1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24 /*
  25  * Copyright 2012, Nexenta Systems, Inc. All rights reserved.
  26  * Copyright (c) 2013 by Delphix. All rights reserved.
  27  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  28  */
  29 
  30 #include <sys/conf.h>
  31 #include <sys/file.h>
  32 #include <sys/ddi.h>
  33 #include <sys/sunddi.h>
  34 #include <sys/modctl.h>
  35 #include <sys/scsi/scsi.h>
  36 #include <sys/scsi/generic/persist.h>
  37 #include <sys/scsi/impl/scsi_reset_notify.h>
  38 #include <sys/disp.h>
  39 #include <sys/byteorder.h>
  40 #include <sys/atomic.h>
  41 #include <sys/ethernet.h>
  42 #include <sys/sdt.h>
  43 #include <sys/nvpair.h>
  44 #include <sys/zone.h>
  45 #include <sys/id_space.h>
  46 
  47 #include <sys/stmf.h>
  48 #include <sys/lpif.h>
  49 #include <sys/portif.h>
  50 #include <sys/stmf_ioctl.h>
  51 #include <sys/pppt_ic_if.h>
  52 
  53 #include "stmf_impl.h"
  54 #include "lun_map.h"
  55 #include "stmf_state.h"
  56 #include "stmf_stats.h"
  57 
  58 /*
  59  * Lock order:
  60  * stmf_state_lock --> ilport_lock/iss_lockp --> ilu_task_lock
  61  */
  62 
  63 static uint64_t stmf_session_counter = 0;
  64 static uint16_t stmf_rtpid_counter = 0;
  65 /* start messages at 1 */
  66 static uint64_t stmf_proxy_msg_id = 1;
  67 #define MSG_ID_TM_BIT   0x8000000000000000
  68 #define ALIGNED_TO_8BYTE_BOUNDARY(i)    (((i) + 7) & ~7)
  69 
  70 /*
  71  * When stmf_io_deadman_enabled is set to B_TRUE, we check that finishing up
  72  * I/O operations on an offlining LU doesn't take longer than stmf_io_deadman
  73  * seconds. If it does, we trigger a panic to inform the user of hung I/O
  74  * blocking us for too long.
  75  */
  76 boolean_t stmf_io_deadman_enabled = B_TRUE;
  77 int stmf_io_deadman = 1000;                     /* seconds */
  78 
  79 struct stmf_svc_clocks;
  80 
  81 static int stmf_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
  82 static int stmf_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
  83 static int stmf_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg,
  84         void **result);
  85 static int stmf_open(dev_t *devp, int flag, int otype, cred_t *credp);
  86 static int stmf_close(dev_t dev, int flag, int otype, cred_t *credp);
  87 static int stmf_ioctl(dev_t dev, int cmd, intptr_t data, int mode,
  88         cred_t *credp, int *rval);
  89 static int stmf_get_stmf_state(stmf_state_desc_t *std);
  90 static int stmf_set_stmf_state(stmf_state_desc_t *std);
  91 static void stmf_abort_task_offline(scsi_task_t *task, int offline_lu,
  92     char *info);
  93 static int stmf_set_alua_state(stmf_alua_state_desc_t *alua_state);
  94 static void stmf_get_alua_state(stmf_alua_state_desc_t *alua_state);
  95 
  96 static void stmf_task_audit(stmf_i_scsi_task_t *itask,
  97     task_audit_event_t te, uint32_t cmd_or_iof, stmf_data_buf_t *dbuf);
  98 
  99 static boolean_t stmf_base16_str_to_binary(char *c, int dplen, uint8_t *dp);
 100 static char stmf_ctoi(char c);
 101 stmf_xfer_data_t *stmf_prepare_tpgs_data(uint8_t ilu_alua);
 102 void stmf_svc_init();
 103 stmf_status_t stmf_svc_fini();
 104 void stmf_svc(void *arg);
 105 static void stmf_wait_ilu_tasks_finish(stmf_i_lu_t *ilu);
 106 void stmf_svc_queue(int cmd, void *obj, stmf_state_change_info_t *info);
 107 static void stmf_svc_kill_obj_requests(void *obj);
 108 static void stmf_svc_timeout(struct stmf_svc_clocks *);
 109 void stmf_check_freetask();
 110 void stmf_abort_target_reset(scsi_task_t *task);
 111 stmf_status_t stmf_lun_reset_poll(stmf_lu_t *lu, struct scsi_task *task,
 112                                                         int target_reset);
 113 void stmf_target_reset_poll(struct scsi_task *task);
 114 void stmf_handle_lun_reset(scsi_task_t *task);
 115 void stmf_handle_target_reset(scsi_task_t *task);
 116 void stmf_xd_to_dbuf(stmf_data_buf_t *dbuf, int set_rel_off);
 117 int stmf_load_ppd_ioctl(stmf_ppioctl_data_t *ppi, uint64_t *ppi_token,
 118     uint32_t *err_ret);
 119 int stmf_delete_ppd_ioctl(stmf_ppioctl_data_t *ppi);
 120 int stmf_get_ppd_ioctl(stmf_ppioctl_data_t *ppi, stmf_ppioctl_data_t *ppi_out,
 121     uint32_t *err_ret);
 122 void stmf_delete_ppd(stmf_pp_data_t *ppd);
 123 void stmf_delete_all_ppds();
 124 void stmf_trace_clear();
 125 void stmf_worker_init();
 126 stmf_status_t stmf_worker_fini();
 127 void stmf_worker_mgmt();
 128 void stmf_worker_task(void *arg);
 129 static void stmf_task_lu_free(scsi_task_t *task, stmf_i_scsi_session_t *iss);
 130 static stmf_status_t stmf_ic_lu_reg(stmf_ic_reg_dereg_lun_msg_t *msg,
 131     uint32_t type);
 132 static stmf_status_t stmf_ic_lu_dereg(stmf_ic_reg_dereg_lun_msg_t *msg);
 133 static stmf_status_t stmf_ic_rx_scsi_status(stmf_ic_scsi_status_msg_t *msg);
 134 static stmf_status_t stmf_ic_rx_status(stmf_ic_status_msg_t *msg);
 135 static stmf_status_t stmf_ic_rx_scsi_data(stmf_ic_scsi_data_msg_t *msg);
 136 void stmf_task_lu_killall(stmf_lu_t *lu, scsi_task_t *tm_task, stmf_status_t s);
 137 
 138 /* pppt modhandle */
 139 ddi_modhandle_t pppt_mod;
 140 
 141 /* pppt modload imported functions */
 142 stmf_ic_reg_port_msg_alloc_func_t ic_reg_port_msg_alloc;
 143 stmf_ic_dereg_port_msg_alloc_func_t ic_dereg_port_msg_alloc;
 144 stmf_ic_reg_lun_msg_alloc_func_t ic_reg_lun_msg_alloc;
 145 stmf_ic_dereg_lun_msg_alloc_func_t ic_dereg_lun_msg_alloc;
 146 stmf_ic_lun_active_msg_alloc_func_t ic_lun_active_msg_alloc;
 147 stmf_ic_scsi_cmd_msg_alloc_func_t ic_scsi_cmd_msg_alloc;
 148 stmf_ic_scsi_data_xfer_done_msg_alloc_func_t ic_scsi_data_xfer_done_msg_alloc;
 149 stmf_ic_session_create_msg_alloc_func_t ic_session_reg_msg_alloc;
 150 stmf_ic_session_destroy_msg_alloc_func_t ic_session_dereg_msg_alloc;
 151 stmf_ic_tx_msg_func_t ic_tx_msg;
 152 stmf_ic_msg_free_func_t ic_msg_free;
 153 
 154 static void stmf_itl_task_start(stmf_i_scsi_task_t *itask);
 155 static void stmf_itl_lu_new_task(stmf_i_scsi_task_t *itask);
 156 static void stmf_itl_task_done(stmf_i_scsi_task_t *itask);
 157 
 158 static void stmf_lport_xfer_start(stmf_i_scsi_task_t *itask,
 159     stmf_data_buf_t *dbuf);
 160 static void stmf_lport_xfer_done(stmf_i_scsi_task_t *itask,
 161     stmf_data_buf_t *dbuf);
 162 
 163 static void stmf_update_kstat_lu_q(scsi_task_t *, void());
 164 static void stmf_update_kstat_lport_q(scsi_task_t *, void());
 165 static void stmf_update_kstat_lu_io(scsi_task_t *, stmf_data_buf_t *);
 166 static void stmf_update_kstat_lport_io(scsi_task_t *, stmf_data_buf_t *);
 167 
 168 static int stmf_irport_compare(const void *void_irport1,
 169     const void *void_irport2);
 170 static stmf_i_remote_port_t *stmf_irport_create(scsi_devid_desc_t *rport_devid);
 171 static void stmf_irport_destroy(stmf_i_remote_port_t *irport);
 172 static stmf_i_remote_port_t *stmf_irport_register(
 173     scsi_devid_desc_t *rport_devid);
 174 static stmf_i_remote_port_t *stmf_irport_lookup_locked(
 175     scsi_devid_desc_t *rport_devid);
 176 static void stmf_irport_deregister(stmf_i_remote_port_t *irport);
 177 
 178 extern struct mod_ops mod_driverops;
 179 
 180 /* =====[ Tunables ]===== */
 181 /* Internal tracing */
 182 volatile int    stmf_trace_on = 1;
 183 volatile int    stmf_trace_buf_size = (1 * 1024 * 1024);
 184 /*
 185  * The reason default task timeout is 75 is because we want the
 186  * host to timeout 1st and mostly host timeout is 60 seconds.
 187  */
 188 volatile int    stmf_default_task_timeout = 75;
 189 /*
 190  * Setting this to one means, you are responsible for config load and keeping
 191  * things in sync with persistent database.
 192  */
 193 volatile int    stmf_allow_modunload = 0;
 194 
 195 volatile int stmf_max_nworkers = 256;
 196 volatile int stmf_min_nworkers = 4;
 197 volatile int stmf_worker_scale_down_delay = 20;
 198 
 199 /* === [ Debugging and fault injection ] === */
 200 #ifdef  DEBUG
 201 volatile uint32_t stmf_drop_task_counter = 0;
 202 volatile uint32_t stmf_drop_buf_counter = 0;
 203 
 204 #endif
 205 
 206 stmf_state_t            stmf_state;
 207 static stmf_lu_t        *dlun0;
 208 
 209 static uint8_t stmf_first_zero[] =
 210         { 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 0xff };
 211 static uint8_t stmf_first_one[] =
 212         { 0xff, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 };
 213 
 214 static kmutex_t trace_buf_lock;
 215 static int      trace_buf_size;
 216 static int      trace_buf_curndx;
 217 caddr_t stmf_trace_buf;
 218 
 219 static enum {
 220         STMF_WORKERS_DISABLED = 0,
 221         STMF_WORKERS_ENABLING,
 222         STMF_WORKERS_ENABLED
 223 } stmf_workers_state = STMF_WORKERS_DISABLED;
 224 static int stmf_i_max_nworkers;
 225 static int stmf_i_min_nworkers;
 226 static int stmf_nworkers_cur;           /* # of workers currently running */
 227 static int stmf_nworkers_needed;        /* # of workers need to be running */
 228 static int stmf_worker_sel_counter = 0;
 229 static uint32_t stmf_cur_ntasks = 0;
 230 static clock_t stmf_wm_last = 0;
 231 /*
 232  * This is equal to stmf_nworkers_cur while we are increasing # workers and
 233  * stmf_nworkers_needed while we are decreasing the worker count.
 234  */
 235 static int stmf_nworkers_accepting_cmds;
 236 static stmf_worker_t *stmf_workers = NULL;
 237 static clock_t stmf_worker_mgmt_delay = 2;
 238 static clock_t stmf_worker_scale_down_timer = 0;
 239 static int stmf_worker_scale_down_qd = 0;
 240 
 241 static struct cb_ops stmf_cb_ops = {
 242         stmf_open,                      /* open */
 243         stmf_close,                     /* close */
 244         nodev,                          /* strategy */
 245         nodev,                          /* print */
 246         nodev,                          /* dump */
 247         nodev,                          /* read */
 248         nodev,                          /* write */
 249         stmf_ioctl,                     /* ioctl */
 250         nodev,                          /* devmap */
 251         nodev,                          /* mmap */
 252         nodev,                          /* segmap */
 253         nochpoll,                       /* chpoll */
 254         ddi_prop_op,                    /* cb_prop_op */
 255         0,                              /* streamtab */
 256         D_NEW | D_MP,                   /* cb_flag */
 257         CB_REV,                         /* rev */
 258         nodev,                          /* aread */
 259         nodev                           /* awrite */
 260 };
 261 
 262 static struct dev_ops stmf_ops = {
 263         DEVO_REV,
 264         0,
 265         stmf_getinfo,
 266         nulldev,                /* identify */
 267         nulldev,                /* probe */
 268         stmf_attach,
 269         stmf_detach,
 270         nodev,                  /* reset */
 271         &stmf_cb_ops,
 272         NULL,                   /* bus_ops */
 273         NULL                    /* power */
 274 };
 275 
 276 #define STMF_NAME               "COMSTAR STMF"
 277 #define STMF_MODULE_NAME        "stmf"
 278 
 279 static struct modldrv modldrv = {
 280         &mod_driverops,
 281         STMF_NAME,
 282         &stmf_ops
 283 };
 284 
 285 static struct modlinkage modlinkage = {
 286         MODREV_1,
 287         &modldrv,
 288         NULL
 289 };
 290 
 291 int
 292 _init(void)
 293 {
 294         int ret;
 295 
 296         ret = mod_install(&modlinkage);
 297         if (ret)
 298                 return (ret);
 299         stmf_trace_buf = kmem_zalloc(stmf_trace_buf_size, KM_SLEEP);
 300         trace_buf_size = stmf_trace_buf_size;
 301         trace_buf_curndx = 0;
 302         mutex_init(&trace_buf_lock, NULL, MUTEX_DRIVER, 0);
 303         bzero(&stmf_state, sizeof (stmf_state_t));
 304         /* STMF service is off by default */
 305         stmf_state.stmf_service_running = 0;
 306         /* default lu/lport states are online */
 307         stmf_state.stmf_default_lu_state = STMF_STATE_ONLINE;
 308         stmf_state.stmf_default_lport_state = STMF_STATE_ONLINE;
 309         mutex_init(&stmf_state.stmf_lock, NULL, MUTEX_DRIVER, NULL);
 310         cv_init(&stmf_state.stmf_cv, NULL, CV_DRIVER, NULL);
 311         stmf_session_counter = (uint64_t)ddi_get_lbolt();
 312         avl_create(&stmf_state.stmf_irportlist,
 313             stmf_irport_compare, sizeof (stmf_i_remote_port_t),
 314             offsetof(stmf_i_remote_port_t, irport_ln));
 315         stmf_state.stmf_ilport_inst_space =
 316             id_space_create("lport-instances", 0, MAX_ILPORT);
 317         stmf_state.stmf_irport_inst_space =
 318             id_space_create("rport-instances", 0, MAX_IRPORT);
 319         stmf_view_init();
 320         stmf_svc_init();
 321         stmf_dlun_init();
 322         return (ret);
 323 }
 324 
 325 int
 326 _fini(void)
 327 {
 328         int ret;
 329         stmf_i_remote_port_t    *irport;
 330         void                    *avl_dest_cookie = NULL;
 331 
 332         if (stmf_state.stmf_service_running)
 333                 return (EBUSY);
 334         if ((!stmf_allow_modunload) &&
 335             (stmf_state.stmf_config_state != STMF_CONFIG_NONE)) {
 336                 return (EBUSY);
 337         }
 338         if (stmf_state.stmf_nlps || stmf_state.stmf_npps) {
 339                 return (EBUSY);
 340         }
 341         if (stmf_dlun_fini() != STMF_SUCCESS)
 342                 return (EBUSY);
 343         if (stmf_worker_fini() != STMF_SUCCESS) {
 344                 stmf_dlun_init();
 345                 return (EBUSY);
 346         }
 347         if (stmf_svc_fini() != STMF_SUCCESS) {
 348                 stmf_dlun_init();
 349                 stmf_worker_init();
 350                 return (EBUSY);
 351         }
 352 
 353         ret = mod_remove(&modlinkage);
 354         if (ret) {
 355                 stmf_svc_init();
 356                 stmf_dlun_init();
 357                 stmf_worker_init();
 358                 return (ret);
 359         }
 360 
 361         stmf_view_clear_config();
 362 
 363         while ((irport = avl_destroy_nodes(&stmf_state.stmf_irportlist,
 364             &avl_dest_cookie)) != NULL)
 365                 stmf_irport_destroy(irport);
 366         avl_destroy(&stmf_state.stmf_irportlist);
 367         id_space_destroy(stmf_state.stmf_ilport_inst_space);
 368         id_space_destroy(stmf_state.stmf_irport_inst_space);
 369 
 370         kmem_free(stmf_trace_buf, stmf_trace_buf_size);
 371         mutex_destroy(&trace_buf_lock);
 372         mutex_destroy(&stmf_state.stmf_lock);
 373         cv_destroy(&stmf_state.stmf_cv);
 374         return (ret);
 375 }
 376 
 377 int
 378 _info(struct modinfo *modinfop)
 379 {
 380         return (mod_info(&modlinkage, modinfop));
 381 }
 382 
 383 /* ARGSUSED */
 384 static int
 385 stmf_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
 386 {
 387         switch (cmd) {
 388         case DDI_INFO_DEVT2DEVINFO:
 389                 *result = stmf_state.stmf_dip;
 390                 break;
 391         case DDI_INFO_DEVT2INSTANCE:
 392                 *result =
 393                     (void *)(uintptr_t)ddi_get_instance(stmf_state.stmf_dip);
 394                 break;
 395         default:
 396                 return (DDI_FAILURE);
 397         }
 398 
 399         return (DDI_SUCCESS);
 400 }
 401 
 402 static int
 403 stmf_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
 404 {
 405         switch (cmd) {
 406         case DDI_ATTACH:
 407                 stmf_state.stmf_dip = dip;
 408 
 409                 if (ddi_create_minor_node(dip, "admin", S_IFCHR, 0,
 410                     DDI_NT_STMF, 0) != DDI_SUCCESS) {
 411                         break;
 412                 }
 413                 ddi_report_dev(dip);
 414                 return (DDI_SUCCESS);
 415         }
 416 
 417         return (DDI_FAILURE);
 418 }
 419 
 420 static int
 421 stmf_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
 422 {
 423         switch (cmd) {
 424         case DDI_DETACH:
 425                 ddi_remove_minor_node(dip, 0);
 426                 return (DDI_SUCCESS);
 427         }
 428 
 429         return (DDI_FAILURE);
 430 }
 431 
 432 /* ARGSUSED */
 433 static int
 434 stmf_open(dev_t *devp, int flag, int otype, cred_t *credp)
 435 {
 436         mutex_enter(&stmf_state.stmf_lock);
 437         if (stmf_state.stmf_exclusive_open) {
 438                 mutex_exit(&stmf_state.stmf_lock);
 439                 return (EBUSY);
 440         }
 441         if (flag & FEXCL) {
 442                 if (stmf_state.stmf_opened) {
 443                         mutex_exit(&stmf_state.stmf_lock);
 444                         return (EBUSY);
 445                 }
 446                 stmf_state.stmf_exclusive_open = 1;
 447         }
 448         stmf_state.stmf_opened = 1;
 449         mutex_exit(&stmf_state.stmf_lock);
 450         return (0);
 451 }
 452 
 453 /* ARGSUSED */
 454 static int
 455 stmf_close(dev_t dev, int flag, int otype, cred_t *credp)
 456 {
 457         mutex_enter(&stmf_state.stmf_lock);
 458         stmf_state.stmf_opened = 0;
 459         if (stmf_state.stmf_exclusive_open &&
 460             (stmf_state.stmf_config_state != STMF_CONFIG_INIT_DONE)) {
 461                 stmf_state.stmf_config_state = STMF_CONFIG_NONE;
 462                 stmf_delete_all_ppds();
 463                 stmf_view_clear_config();
 464                 stmf_view_init();
 465         }
 466         stmf_state.stmf_exclusive_open = 0;
 467         mutex_exit(&stmf_state.stmf_lock);
 468         return (0);
 469 }
 470 
 471 int
 472 stmf_copyin_iocdata(intptr_t data, int mode, stmf_iocdata_t **iocd,
 473                                                 void **ibuf, void **obuf)
 474 {
 475         int ret;
 476 
 477         *ibuf = NULL;
 478         *obuf = NULL;
 479         *iocd = kmem_zalloc(sizeof (stmf_iocdata_t), KM_SLEEP);
 480 
 481         ret = ddi_copyin((void *)data, *iocd, sizeof (stmf_iocdata_t), mode);
 482         if (ret)
 483                 return (EFAULT);
 484         if ((*iocd)->stmf_version != STMF_VERSION_1) {
 485                 ret = EINVAL;
 486                 goto copyin_iocdata_done;
 487         }
 488         if ((*iocd)->stmf_ibuf_size) {
 489                 *ibuf = kmem_zalloc((*iocd)->stmf_ibuf_size, KM_SLEEP);
 490                 ret = ddi_copyin((void *)((unsigned long)(*iocd)->stmf_ibuf),
 491                     *ibuf, (*iocd)->stmf_ibuf_size, mode);
 492         }
 493         if ((*iocd)->stmf_obuf_size)
 494                 *obuf = kmem_zalloc((*iocd)->stmf_obuf_size, KM_SLEEP);
 495 
 496         if (ret == 0)
 497                 return (0);
 498         ret = EFAULT;
 499 copyin_iocdata_done:;
 500         if (*obuf) {
 501                 kmem_free(*obuf, (*iocd)->stmf_obuf_size);
 502                 *obuf = NULL;
 503         }
 504         if (*ibuf) {
 505                 kmem_free(*ibuf, (*iocd)->stmf_ibuf_size);
 506                 *ibuf = NULL;
 507         }
 508         kmem_free(*iocd, sizeof (stmf_iocdata_t));
 509         return (ret);
 510 }
 511 
 512 int
 513 stmf_copyout_iocdata(intptr_t data, int mode, stmf_iocdata_t *iocd, void *obuf)
 514 {
 515         int ret;
 516 
 517         if (iocd->stmf_obuf_size) {
 518                 ret = ddi_copyout(obuf, (void *)(unsigned long)iocd->stmf_obuf,
 519                     iocd->stmf_obuf_size, mode);
 520                 if (ret)
 521                         return (EFAULT);
 522         }
 523         ret = ddi_copyout(iocd, (void *)data, sizeof (stmf_iocdata_t), mode);
 524         if (ret)
 525                 return (EFAULT);
 526         return (0);
 527 }
 528 
 529 /* ARGSUSED */
 530 static int
 531 stmf_ioctl(dev_t dev, int cmd, intptr_t data, int mode,
 532         cred_t *credp, int *rval)
 533 {
 534         stmf_iocdata_t *iocd;
 535         void *ibuf = NULL, *obuf = NULL;
 536         slist_lu_t *luid_list;
 537         slist_target_port_t *lportid_list;
 538         stmf_i_lu_t *ilu;
 539         stmf_i_local_port_t *ilport;
 540         stmf_i_scsi_session_t *iss;
 541         slist_scsi_session_t *iss_list;
 542         sioc_lu_props_t *lup;
 543         sioc_target_port_props_t *lportp;
 544         stmf_ppioctl_data_t *ppi, *ppi_out = NULL;
 545         uint64_t *ppi_token = NULL;
 546         uint8_t *p_id, *id;
 547         stmf_state_desc_t *std;
 548         stmf_status_t ctl_ret;
 549         stmf_state_change_info_t ssi;
 550         int ret = 0;
 551         uint32_t n;
 552         int i;
 553         stmf_group_op_data_t *grp_entry;
 554         stmf_group_name_t *grpname;
 555         stmf_view_op_entry_t *ve;
 556         stmf_id_type_t idtype;
 557         stmf_id_data_t *id_entry;
 558         stmf_id_list_t  *id_list;
 559         stmf_view_entry_t *view_entry;
 560         stmf_set_props_t *stmf_set_props;
 561         uint32_t        veid;
 562         if ((cmd & 0xff000000) != STMF_IOCTL) {
 563                 return (ENOTTY);
 564         }
 565 
 566         if (drv_priv(credp) != 0) {
 567                 return (EPERM);
 568         }
 569 
 570         ret = stmf_copyin_iocdata(data, mode, &iocd, &ibuf, &obuf);
 571         if (ret)
 572                 return (ret);
 573         iocd->stmf_error = 0;
 574 
 575         switch (cmd) {
 576         case STMF_IOCTL_LU_LIST:
 577                 /* retrieves both registered/unregistered */
 578                 mutex_enter(&stmf_state.stmf_lock);
 579                 id_list = &stmf_state.stmf_luid_list;
 580                 n = min(id_list->id_count,
 581                     (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
 582                 iocd->stmf_obuf_max_nentries = id_list->id_count;
 583                 luid_list = (slist_lu_t *)obuf;
 584                 id_entry = id_list->idl_head;
 585                 for (i = 0; i < n; i++) {
 586                         bcopy(id_entry->id_data, luid_list[i].lu_guid, 16);
 587                         id_entry = id_entry->id_next;
 588                 }
 589 
 590                 n = iocd->stmf_obuf_size/sizeof (slist_lu_t);
 591                 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
 592                         id = (uint8_t *)ilu->ilu_lu->lu_id;
 593                         if (stmf_lookup_id(id_list, 16, id + 4) == NULL) {
 594                                 iocd->stmf_obuf_max_nentries++;
 595                                 if (i < n) {
 596                                         bcopy(id + 4, luid_list[i].lu_guid,
 597                                             sizeof (slist_lu_t));
 598                                         i++;
 599                                 }
 600                         }
 601                 }
 602                 iocd->stmf_obuf_nentries = i;
 603                 mutex_exit(&stmf_state.stmf_lock);
 604                 break;
 605 
 606         case STMF_IOCTL_REG_LU_LIST:
 607                 mutex_enter(&stmf_state.stmf_lock);
 608                 iocd->stmf_obuf_max_nentries = stmf_state.stmf_nlus;
 609                 n = min(stmf_state.stmf_nlus,
 610                     (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
 611                 iocd->stmf_obuf_nentries = n;
 612                 ilu = stmf_state.stmf_ilulist;
 613                 luid_list = (slist_lu_t *)obuf;
 614                 for (i = 0; i < n; i++) {
 615                         uint8_t *id;
 616                         id = (uint8_t *)ilu->ilu_lu->lu_id;
 617                         bcopy(id + 4, luid_list[i].lu_guid, 16);
 618                         ilu = ilu->ilu_next;
 619                 }
 620                 mutex_exit(&stmf_state.stmf_lock);
 621                 break;
 622 
 623         case STMF_IOCTL_VE_LU_LIST:
 624                 mutex_enter(&stmf_state.stmf_lock);
 625                 id_list = &stmf_state.stmf_luid_list;
 626                 n = min(id_list->id_count,
 627                     (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
 628                 iocd->stmf_obuf_max_nentries = id_list->id_count;
 629                 iocd->stmf_obuf_nentries = n;
 630                 luid_list = (slist_lu_t *)obuf;
 631                 id_entry = id_list->idl_head;
 632                 for (i = 0; i < n; i++) {
 633                         bcopy(id_entry->id_data, luid_list[i].lu_guid, 16);
 634                         id_entry = id_entry->id_next;
 635                 }
 636                 mutex_exit(&stmf_state.stmf_lock);
 637                 break;
 638 
 639         case STMF_IOCTL_TARGET_PORT_LIST:
 640                 mutex_enter(&stmf_state.stmf_lock);
 641                 iocd->stmf_obuf_max_nentries = stmf_state.stmf_nlports;
 642                 n = min(stmf_state.stmf_nlports,
 643                     (iocd->stmf_obuf_size)/sizeof (slist_target_port_t));
 644                 iocd->stmf_obuf_nentries = n;
 645                 ilport = stmf_state.stmf_ilportlist;
 646                 lportid_list = (slist_target_port_t *)obuf;
 647                 for (i = 0; i < n; i++) {
 648                         uint8_t *id;
 649                         id = (uint8_t *)ilport->ilport_lport->lport_id;
 650                         bcopy(id, lportid_list[i].target, id[3] + 4);
 651                         ilport = ilport->ilport_next;
 652                 }
 653                 mutex_exit(&stmf_state.stmf_lock);
 654                 break;
 655 
 656         case STMF_IOCTL_SESSION_LIST:
 657                 p_id = (uint8_t *)ibuf;
 658                 if ((p_id == NULL) || (iocd->stmf_ibuf_size < 4) ||
 659                     (iocd->stmf_ibuf_size < (p_id[3] + 4))) {
 660                         ret = EINVAL;
 661                         break;
 662                 }
 663                 mutex_enter(&stmf_state.stmf_lock);
 664                 for (ilport = stmf_state.stmf_ilportlist; ilport; ilport =
 665                     ilport->ilport_next) {
 666                         uint8_t *id;
 667                         id = (uint8_t *)ilport->ilport_lport->lport_id;
 668                         if ((p_id[3] == id[3]) &&
 669                             (bcmp(p_id + 4, id + 4, id[3]) == 0)) {
 670                                 break;
 671                         }
 672                 }
 673                 if (ilport == NULL) {
 674                         mutex_exit(&stmf_state.stmf_lock);
 675                         ret = ENOENT;
 676                         break;
 677                 }
 678                 iocd->stmf_obuf_max_nentries = ilport->ilport_nsessions;
 679                 n = min(ilport->ilport_nsessions,
 680                     (iocd->stmf_obuf_size)/sizeof (slist_scsi_session_t));
 681                 iocd->stmf_obuf_nentries = n;
 682                 iss = ilport->ilport_ss_list;
 683                 iss_list = (slist_scsi_session_t *)obuf;
 684                 for (i = 0; i < n; i++) {
 685                         uint8_t *id;
 686                         id = (uint8_t *)iss->iss_ss->ss_rport_id;
 687                         bcopy(id, iss_list[i].initiator, id[3] + 4);
 688                         iss_list[i].creation_time = (uint32_t)
 689                             iss->iss_creation_time;
 690                         if (iss->iss_ss->ss_rport_alias) {
 691                                 (void) strncpy(iss_list[i].alias,
 692                                     iss->iss_ss->ss_rport_alias, 255);
 693                                 iss_list[i].alias[255] = 0;
 694                         } else {
 695                                 iss_list[i].alias[0] = 0;
 696                         }
 697                         iss = iss->iss_next;
 698                 }
 699                 mutex_exit(&stmf_state.stmf_lock);
 700                 break;
 701 
 702         case STMF_IOCTL_GET_LU_PROPERTIES:
 703                 p_id = (uint8_t *)ibuf;
 704                 if ((iocd->stmf_ibuf_size < 16) ||
 705                     (iocd->stmf_obuf_size < sizeof (sioc_lu_props_t)) ||
 706                     (p_id[0] == 0)) {
 707                         ret = EINVAL;
 708                         break;
 709                 }
 710                 mutex_enter(&stmf_state.stmf_lock);
 711                 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
 712                         if (bcmp(p_id, ilu->ilu_lu->lu_id->ident, 16) == 0)
 713                                 break;
 714                 }
 715                 if (ilu == NULL) {
 716                         mutex_exit(&stmf_state.stmf_lock);
 717                         ret = ENOENT;
 718                         break;
 719                 }
 720                 lup = (sioc_lu_props_t *)obuf;
 721                 bcopy(ilu->ilu_lu->lu_id->ident, lup->lu_guid, 16);
 722                 lup->lu_state = ilu->ilu_state & 0x0f;
 723                 lup->lu_present = 1; /* XXX */
 724                 (void) strncpy(lup->lu_provider_name,
 725                     ilu->ilu_lu->lu_lp->lp_name, 255);
 726                 lup->lu_provider_name[254] = 0;
 727                 if (ilu->ilu_lu->lu_alias) {
 728                         (void) strncpy(lup->lu_alias,
 729                             ilu->ilu_lu->lu_alias, 255);
 730                         lup->lu_alias[255] = 0;
 731                 } else {
 732                         lup->lu_alias[0] = 0;
 733                 }
 734                 mutex_exit(&stmf_state.stmf_lock);
 735                 break;
 736 
 737         case STMF_IOCTL_GET_TARGET_PORT_PROPERTIES:
 738                 p_id = (uint8_t *)ibuf;
 739                 if ((p_id == NULL) ||
 740                     (iocd->stmf_ibuf_size < (p_id[3] + 4)) ||
 741                     (iocd->stmf_obuf_size <
 742                     sizeof (sioc_target_port_props_t))) {
 743                         ret = EINVAL;
 744                         break;
 745                 }
 746                 mutex_enter(&stmf_state.stmf_lock);
 747                 for (ilport = stmf_state.stmf_ilportlist; ilport;
 748                     ilport = ilport->ilport_next) {
 749                         uint8_t *id;
 750                         id = (uint8_t *)ilport->ilport_lport->lport_id;
 751                         if ((p_id[3] == id[3]) &&
 752                             (bcmp(p_id+4, id+4, id[3]) == 0))
 753                                 break;
 754                 }
 755                 if (ilport == NULL) {
 756                         mutex_exit(&stmf_state.stmf_lock);
 757                         ret = ENOENT;
 758                         break;
 759                 }
 760                 lportp = (sioc_target_port_props_t *)obuf;
 761                 bcopy(ilport->ilport_lport->lport_id, lportp->tgt_id,
 762                     ilport->ilport_lport->lport_id->ident_length + 4);
 763                 lportp->tgt_state = ilport->ilport_state & 0x0f;
 764                 lportp->tgt_present = 1; /* XXX */
 765                 (void) strncpy(lportp->tgt_provider_name,
 766                     ilport->ilport_lport->lport_pp->pp_name, 255);
 767                 lportp->tgt_provider_name[254] = 0;
 768                 if (ilport->ilport_lport->lport_alias) {
 769                         (void) strncpy(lportp->tgt_alias,
 770                             ilport->ilport_lport->lport_alias, 255);
 771                         lportp->tgt_alias[255] = 0;
 772                 } else {
 773                         lportp->tgt_alias[0] = 0;
 774                 }
 775                 mutex_exit(&stmf_state.stmf_lock);
 776                 break;
 777 
 778         case STMF_IOCTL_SET_STMF_STATE:
 779                 if ((ibuf == NULL) ||
 780                     (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
 781                         ret = EINVAL;
 782                         break;
 783                 }
 784                 ret = stmf_set_stmf_state((stmf_state_desc_t *)ibuf);
 785                 break;
 786 
 787         case STMF_IOCTL_GET_STMF_STATE:
 788                 if ((obuf == NULL) ||
 789                     (iocd->stmf_obuf_size < sizeof (stmf_state_desc_t))) {
 790                         ret = EINVAL;
 791                         break;
 792                 }
 793                 ret = stmf_get_stmf_state((stmf_state_desc_t *)obuf);
 794                 break;
 795 
 796         case STMF_IOCTL_SET_ALUA_STATE:
 797                 if ((ibuf == NULL) ||
 798                     (iocd->stmf_ibuf_size < sizeof (stmf_alua_state_desc_t))) {
 799                         ret = EINVAL;
 800                         break;
 801                 }
 802                 ret = stmf_set_alua_state((stmf_alua_state_desc_t *)ibuf);
 803                 break;
 804 
 805         case STMF_IOCTL_GET_ALUA_STATE:
 806                 if ((obuf == NULL) ||
 807                     (iocd->stmf_obuf_size < sizeof (stmf_alua_state_desc_t))) {
 808                         ret = EINVAL;
 809                         break;
 810                 }
 811                 stmf_get_alua_state((stmf_alua_state_desc_t *)obuf);
 812                 break;
 813 
 814         case STMF_IOCTL_SET_LU_STATE:
 815                 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
 816                 ssi.st_additional_info = NULL;
 817                 std = (stmf_state_desc_t *)ibuf;
 818                 if ((ibuf == NULL) ||
 819                     (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
 820                         ret = EINVAL;
 821                         break;
 822                 }
 823                 p_id = std->ident;
 824                 mutex_enter(&stmf_state.stmf_lock);
 825                 if (stmf_state.stmf_inventory_locked) {
 826                         mutex_exit(&stmf_state.stmf_lock);
 827                         ret = EBUSY;
 828                         break;
 829                 }
 830                 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
 831                         if (bcmp(p_id, ilu->ilu_lu->lu_id->ident, 16) == 0)
 832                                 break;
 833                 }
 834                 if (ilu == NULL) {
 835                         mutex_exit(&stmf_state.stmf_lock);
 836                         ret = ENOENT;
 837                         break;
 838                 }
 839                 stmf_state.stmf_inventory_locked = 1;
 840                 mutex_exit(&stmf_state.stmf_lock);
 841                 cmd = (std->state == STMF_STATE_ONLINE) ? STMF_CMD_LU_ONLINE :
 842                     STMF_CMD_LU_OFFLINE;
 843                 ctl_ret = stmf_ctl(cmd, (void *)ilu->ilu_lu, &ssi);
 844                 if (ctl_ret == STMF_ALREADY)
 845                         ret = 0;
 846                 else if (ctl_ret == STMF_BUSY)
 847                         ret = EBUSY;
 848                 else if (ctl_ret != STMF_SUCCESS)
 849                         ret = EIO;
 850                 mutex_enter(&stmf_state.stmf_lock);
 851                 stmf_state.stmf_inventory_locked = 0;
 852                 mutex_exit(&stmf_state.stmf_lock);
 853                 break;
 854 
 855         case STMF_IOCTL_SET_STMF_PROPS:
 856                 if ((ibuf == NULL) ||
 857                     (iocd->stmf_ibuf_size < sizeof (stmf_set_props_t))) {
 858                         ret = EINVAL;
 859                         break;
 860                 }
 861                 stmf_set_props = (stmf_set_props_t *)ibuf;
 862                 mutex_enter(&stmf_state.stmf_lock);
 863                 if ((stmf_set_props->default_lu_state_value ==
 864                     STMF_STATE_OFFLINE) ||
 865                     (stmf_set_props->default_lu_state_value ==
 866                     STMF_STATE_ONLINE)) {
 867                         stmf_state.stmf_default_lu_state =
 868                             stmf_set_props->default_lu_state_value;
 869                 }
 870                 if ((stmf_set_props->default_target_state_value ==
 871                     STMF_STATE_OFFLINE) ||
 872                     (stmf_set_props->default_target_state_value ==
 873                     STMF_STATE_ONLINE)) {
 874                         stmf_state.stmf_default_lport_state =
 875                             stmf_set_props->default_target_state_value;
 876                 }
 877 
 878                 mutex_exit(&stmf_state.stmf_lock);
 879                 break;
 880 
 881         case STMF_IOCTL_SET_TARGET_PORT_STATE:
 882                 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
 883                 ssi.st_additional_info = NULL;
 884                 std = (stmf_state_desc_t *)ibuf;
 885                 if ((ibuf == NULL) ||
 886                     (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
 887                         ret = EINVAL;
 888                         break;
 889                 }
 890                 p_id = std->ident;
 891                 mutex_enter(&stmf_state.stmf_lock);
 892                 if (stmf_state.stmf_inventory_locked) {
 893                         mutex_exit(&stmf_state.stmf_lock);
 894                         ret = EBUSY;
 895                         break;
 896                 }
 897                 for (ilport = stmf_state.stmf_ilportlist; ilport;
 898                     ilport = ilport->ilport_next) {
 899                         uint8_t *id;
 900                         id = (uint8_t *)ilport->ilport_lport->lport_id;
 901                         if ((id[3] == p_id[3]) &&
 902                             (bcmp(id+4, p_id+4, id[3]) == 0)) {
 903                                 break;
 904                         }
 905                 }
 906                 if (ilport == NULL) {
 907                         mutex_exit(&stmf_state.stmf_lock);
 908                         ret = ENOENT;
 909                         break;
 910                 }
 911                 stmf_state.stmf_inventory_locked = 1;
 912                 mutex_exit(&stmf_state.stmf_lock);
 913                 cmd = (std->state == STMF_STATE_ONLINE) ?
 914                     STMF_CMD_LPORT_ONLINE : STMF_CMD_LPORT_OFFLINE;
 915                 ctl_ret = stmf_ctl(cmd, (void *)ilport->ilport_lport, &ssi);
 916                 if (ctl_ret == STMF_ALREADY)
 917                         ret = 0;
 918                 else if (ctl_ret == STMF_BUSY)
 919                         ret = EBUSY;
 920                 else if (ctl_ret != STMF_SUCCESS)
 921                         ret = EIO;
 922                 mutex_enter(&stmf_state.stmf_lock);
 923                 stmf_state.stmf_inventory_locked = 0;
 924                 mutex_exit(&stmf_state.stmf_lock);
 925                 break;
 926 
 927         case STMF_IOCTL_ADD_HG_ENTRY:
 928                 idtype = STMF_ID_TYPE_HOST;
 929                 /* FALLTHROUGH */
 930         case STMF_IOCTL_ADD_TG_ENTRY:
 931                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
 932                         ret = EACCES;
 933                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
 934                         break;
 935                 }
 936                 if (cmd == STMF_IOCTL_ADD_TG_ENTRY) {
 937                         idtype = STMF_ID_TYPE_TARGET;
 938                 }
 939                 grp_entry = (stmf_group_op_data_t *)ibuf;
 940                 if ((ibuf == NULL) ||
 941                     (iocd->stmf_ibuf_size < sizeof (stmf_group_op_data_t))) {
 942                         ret = EINVAL;
 943                         break;
 944                 }
 945                 if (grp_entry->group.name[0] == '*') {
 946                         ret = EINVAL;
 947                         break; /* not allowed */
 948                 }
 949                 mutex_enter(&stmf_state.stmf_lock);
 950                 ret = stmf_add_group_member(grp_entry->group.name,
 951                     grp_entry->group.name_size,
 952                     grp_entry->ident + 4,
 953                     grp_entry->ident[3],
 954                     idtype,
 955                     &iocd->stmf_error);
 956                 mutex_exit(&stmf_state.stmf_lock);
 957                 break;
 958         case STMF_IOCTL_REMOVE_HG_ENTRY:
 959                 idtype = STMF_ID_TYPE_HOST;
 960                 /* FALLTHROUGH */
 961         case STMF_IOCTL_REMOVE_TG_ENTRY:
 962                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
 963                         ret = EACCES;
 964                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
 965                         break;
 966                 }
 967                 if (cmd == STMF_IOCTL_REMOVE_TG_ENTRY) {
 968                         idtype = STMF_ID_TYPE_TARGET;
 969                 }
 970                 grp_entry = (stmf_group_op_data_t *)ibuf;
 971                 if ((ibuf == NULL) ||
 972                     (iocd->stmf_ibuf_size < sizeof (stmf_group_op_data_t))) {
 973                         ret = EINVAL;
 974                         break;
 975                 }
 976                 if (grp_entry->group.name[0] == '*') {
 977                         ret = EINVAL;
 978                         break; /* not allowed */
 979                 }
 980                 mutex_enter(&stmf_state.stmf_lock);
 981                 ret = stmf_remove_group_member(grp_entry->group.name,
 982                     grp_entry->group.name_size,
 983                     grp_entry->ident + 4,
 984                     grp_entry->ident[3],
 985                     idtype,
 986                     &iocd->stmf_error);
 987                 mutex_exit(&stmf_state.stmf_lock);
 988                 break;
 989         case STMF_IOCTL_CREATE_HOST_GROUP:
 990                 idtype = STMF_ID_TYPE_HOST_GROUP;
 991                 /* FALLTHROUGH */
 992         case STMF_IOCTL_CREATE_TARGET_GROUP:
 993                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
 994                         ret = EACCES;
 995                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
 996                         break;
 997                 }
 998                 grpname = (stmf_group_name_t *)ibuf;
 999 
1000                 if (cmd == STMF_IOCTL_CREATE_TARGET_GROUP)
1001                         idtype = STMF_ID_TYPE_TARGET_GROUP;
1002                 if ((ibuf == NULL) ||
1003                     (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1004                         ret = EINVAL;
1005                         break;
1006                 }
1007                 if (grpname->name[0] == '*') {
1008                         ret = EINVAL;
1009                         break; /* not allowed */
1010                 }
1011                 mutex_enter(&stmf_state.stmf_lock);
1012                 ret = stmf_add_group(grpname->name,
1013                     grpname->name_size, idtype, &iocd->stmf_error);
1014                 mutex_exit(&stmf_state.stmf_lock);
1015                 break;
1016         case STMF_IOCTL_REMOVE_HOST_GROUP:
1017                 idtype = STMF_ID_TYPE_HOST_GROUP;
1018                 /* FALLTHROUGH */
1019         case STMF_IOCTL_REMOVE_TARGET_GROUP:
1020                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1021                         ret = EACCES;
1022                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1023                         break;
1024                 }
1025                 grpname = (stmf_group_name_t *)ibuf;
1026                 if (cmd == STMF_IOCTL_REMOVE_TARGET_GROUP)
1027                         idtype = STMF_ID_TYPE_TARGET_GROUP;
1028                 if ((ibuf == NULL) ||
1029                     (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1030                         ret = EINVAL;
1031                         break;
1032                 }
1033                 if (grpname->name[0] == '*') {
1034                         ret = EINVAL;
1035                         break; /* not allowed */
1036                 }
1037                 mutex_enter(&stmf_state.stmf_lock);
1038                 ret = stmf_remove_group(grpname->name,
1039                     grpname->name_size, idtype, &iocd->stmf_error);
1040                 mutex_exit(&stmf_state.stmf_lock);
1041                 break;
1042         case STMF_IOCTL_VALIDATE_VIEW:
1043         case STMF_IOCTL_ADD_VIEW_ENTRY:
1044                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1045                         ret = EACCES;
1046                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1047                         break;
1048                 }
1049                 ve = (stmf_view_op_entry_t *)ibuf;
1050                 if ((ibuf == NULL) ||
1051                     (iocd->stmf_ibuf_size < sizeof (stmf_view_op_entry_t))) {
1052                         ret = EINVAL;
1053                         break;
1054                 }
1055                 if (!ve->ve_lu_number_valid)
1056                         ve->ve_lu_nbr[2] = 0xFF;
1057                 if (ve->ve_all_hosts) {
1058                         ve->ve_host_group.name[0] = '*';
1059                         ve->ve_host_group.name_size = 1;
1060                 }
1061                 if (ve->ve_all_targets) {
1062                         ve->ve_target_group.name[0] = '*';
1063                         ve->ve_target_group.name_size = 1;
1064                 }
1065                 if (ve->ve_ndx_valid)
1066                         veid = ve->ve_ndx;
1067                 else
1068                         veid = 0xffffffff;
1069                 mutex_enter(&stmf_state.stmf_lock);
1070                 if (cmd == STMF_IOCTL_ADD_VIEW_ENTRY) {
1071                         ret = stmf_add_ve(ve->ve_host_group.name,
1072                             ve->ve_host_group.name_size,
1073                             ve->ve_target_group.name,
1074                             ve->ve_target_group.name_size,
1075                             ve->ve_guid,
1076                             &veid,
1077                             ve->ve_lu_nbr,
1078                             &iocd->stmf_error);
1079                 } else {  /* STMF_IOCTL_VALIDATE_VIEW */
1080                         ret = stmf_validate_lun_ve(ve->ve_host_group.name,
1081                             ve->ve_host_group.name_size,
1082                             ve->ve_target_group.name,
1083                             ve->ve_target_group.name_size,
1084                             ve->ve_lu_nbr,
1085                             &iocd->stmf_error);
1086                 }
1087                 mutex_exit(&stmf_state.stmf_lock);
1088                 if (ret == 0 &&
1089                     (!ve->ve_ndx_valid || !ve->ve_lu_number_valid) &&
1090                     iocd->stmf_obuf_size >= sizeof (stmf_view_op_entry_t)) {
1091                         stmf_view_op_entry_t *ve_ret =
1092                             (stmf_view_op_entry_t *)obuf;
1093                         iocd->stmf_obuf_nentries = 1;
1094                         iocd->stmf_obuf_max_nentries = 1;
1095                         if (!ve->ve_ndx_valid) {
1096                                 ve_ret->ve_ndx = veid;
1097                                 ve_ret->ve_ndx_valid = 1;
1098                         }
1099                         if (!ve->ve_lu_number_valid) {
1100                                 ve_ret->ve_lu_number_valid = 1;
1101                                 bcopy(ve->ve_lu_nbr, ve_ret->ve_lu_nbr, 8);
1102                         }
1103                 }
1104                 break;
1105         case STMF_IOCTL_REMOVE_VIEW_ENTRY:
1106                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1107                         ret = EACCES;
1108                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1109                         break;
1110                 }
1111                 ve = (stmf_view_op_entry_t *)ibuf;
1112                 if ((ibuf == NULL) ||
1113                     (iocd->stmf_ibuf_size < sizeof (stmf_view_op_entry_t))) {
1114                         ret = EINVAL;
1115                         break;
1116                 }
1117                 if (!ve->ve_ndx_valid) {
1118                         ret = EINVAL;
1119                         break;
1120                 }
1121                 mutex_enter(&stmf_state.stmf_lock);
1122                 ret = stmf_remove_ve_by_id(ve->ve_guid, ve->ve_ndx,
1123                     &iocd->stmf_error);
1124                 mutex_exit(&stmf_state.stmf_lock);
1125                 break;
1126         case STMF_IOCTL_GET_HG_LIST:
1127                 id_list = &stmf_state.stmf_hg_list;
1128                 /* FALLTHROUGH */
1129         case STMF_IOCTL_GET_TG_LIST:
1130                 if (cmd == STMF_IOCTL_GET_TG_LIST)
1131                         id_list = &stmf_state.stmf_tg_list;
1132                 mutex_enter(&stmf_state.stmf_lock);
1133                 iocd->stmf_obuf_max_nentries = id_list->id_count;
1134                 n = min(id_list->id_count,
1135                     (iocd->stmf_obuf_size)/sizeof (stmf_group_name_t));
1136                 iocd->stmf_obuf_nentries = n;
1137                 id_entry = id_list->idl_head;
1138                 grpname = (stmf_group_name_t *)obuf;
1139                 for (i = 0; i < n; i++) {
1140                         if (id_entry->id_data[0] == '*') {
1141                                 if (iocd->stmf_obuf_nentries > 0) {
1142                                         iocd->stmf_obuf_nentries--;
1143                                 }
1144                                 id_entry = id_entry->id_next;
1145                                 continue;
1146                         }
1147                         grpname->name_size = id_entry->id_data_size;
1148                         bcopy(id_entry->id_data, grpname->name,
1149                             id_entry->id_data_size);
1150                         grpname++;
1151                         id_entry = id_entry->id_next;
1152                 }
1153                 mutex_exit(&stmf_state.stmf_lock);
1154                 break;
1155         case STMF_IOCTL_GET_HG_ENTRIES:
1156                 id_list = &stmf_state.stmf_hg_list;
1157                 /* FALLTHROUGH */
1158         case STMF_IOCTL_GET_TG_ENTRIES:
1159                 grpname = (stmf_group_name_t *)ibuf;
1160                 if ((ibuf == NULL) ||
1161                     (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1162                         ret = EINVAL;
1163                         break;
1164                 }
1165                 if (cmd == STMF_IOCTL_GET_TG_ENTRIES) {
1166                         id_list = &stmf_state.stmf_tg_list;
1167                 }
1168                 mutex_enter(&stmf_state.stmf_lock);
1169                 id_entry = stmf_lookup_id(id_list, grpname->name_size,
1170                     grpname->name);
1171                 if (!id_entry)
1172                         ret = ENODEV;
1173                 else {
1174                         stmf_ge_ident_t *grp_entry;
1175                         id_list = (stmf_id_list_t *)id_entry->id_impl_specific;
1176                         iocd->stmf_obuf_max_nentries = id_list->id_count;
1177                         n = min(id_list->id_count,
1178                             iocd->stmf_obuf_size/sizeof (stmf_ge_ident_t));
1179                         iocd->stmf_obuf_nentries = n;
1180                         id_entry = id_list->idl_head;
1181                         grp_entry = (stmf_ge_ident_t *)obuf;
1182                         for (i = 0; i < n; i++) {
1183                                 bcopy(id_entry->id_data, grp_entry->ident,
1184                                     id_entry->id_data_size);
1185                                 grp_entry->ident_size = id_entry->id_data_size;
1186                                 id_entry = id_entry->id_next;
1187                                 grp_entry++;
1188                         }
1189                 }
1190                 mutex_exit(&stmf_state.stmf_lock);
1191                 break;
1192 
1193         case STMF_IOCTL_GET_VE_LIST:
1194                 n = iocd->stmf_obuf_size/sizeof (stmf_view_op_entry_t);
1195                 mutex_enter(&stmf_state.stmf_lock);
1196                 ve = (stmf_view_op_entry_t *)obuf;
1197                 for (id_entry = stmf_state.stmf_luid_list.idl_head;
1198                     id_entry; id_entry = id_entry->id_next) {
1199                         for (view_entry = (stmf_view_entry_t *)
1200                             id_entry->id_impl_specific; view_entry;
1201                             view_entry = view_entry->ve_next) {
1202                                 iocd->stmf_obuf_max_nentries++;
1203                                 if (iocd->stmf_obuf_nentries >= n)
1204                                         continue;
1205                                 ve->ve_ndx_valid = 1;
1206                                 ve->ve_ndx = view_entry->ve_id;
1207                                 ve->ve_lu_number_valid = 1;
1208                                 bcopy(view_entry->ve_lun, ve->ve_lu_nbr, 8);
1209                                 bcopy(view_entry->ve_luid->id_data, ve->ve_guid,
1210                                     view_entry->ve_luid->id_data_size);
1211                                 if (view_entry->ve_hg->id_data[0] == '*') {
1212                                         ve->ve_all_hosts = 1;
1213                                 } else {
1214                                         bcopy(view_entry->ve_hg->id_data,
1215                                             ve->ve_host_group.name,
1216                                             view_entry->ve_hg->id_data_size);
1217                                         ve->ve_host_group.name_size =
1218                                             view_entry->ve_hg->id_data_size;
1219                                 }
1220 
1221                                 if (view_entry->ve_tg->id_data[0] == '*') {
1222                                         ve->ve_all_targets = 1;
1223                                 } else {
1224                                         bcopy(view_entry->ve_tg->id_data,
1225                                             ve->ve_target_group.name,
1226                                             view_entry->ve_tg->id_data_size);
1227                                         ve->ve_target_group.name_size =
1228                                             view_entry->ve_tg->id_data_size;
1229                                 }
1230                                 ve++;
1231                                 iocd->stmf_obuf_nentries++;
1232                         }
1233                 }
1234                 mutex_exit(&stmf_state.stmf_lock);
1235                 break;
1236 
1237         case STMF_IOCTL_LU_VE_LIST:
1238                 p_id = (uint8_t *)ibuf;
1239                 if ((iocd->stmf_ibuf_size != 16) ||
1240                     (iocd->stmf_obuf_size < sizeof (stmf_view_op_entry_t))) {
1241                         ret = EINVAL;
1242                         break;
1243                 }
1244 
1245                 n = iocd->stmf_obuf_size/sizeof (stmf_view_op_entry_t);
1246                 mutex_enter(&stmf_state.stmf_lock);
1247                 ve = (stmf_view_op_entry_t *)obuf;
1248                 for (id_entry = stmf_state.stmf_luid_list.idl_head;
1249                     id_entry; id_entry = id_entry->id_next) {
1250                         if (bcmp(id_entry->id_data, p_id, 16) != 0)
1251                                 continue;
1252                         for (view_entry = (stmf_view_entry_t *)
1253                             id_entry->id_impl_specific; view_entry;
1254                             view_entry = view_entry->ve_next) {
1255                                 iocd->stmf_obuf_max_nentries++;
1256                                 if (iocd->stmf_obuf_nentries >= n)
1257                                         continue;
1258                                 ve->ve_ndx_valid = 1;
1259                                 ve->ve_ndx = view_entry->ve_id;
1260                                 ve->ve_lu_number_valid = 1;
1261                                 bcopy(view_entry->ve_lun, ve->ve_lu_nbr, 8);
1262                                 bcopy(view_entry->ve_luid->id_data, ve->ve_guid,
1263                                     view_entry->ve_luid->id_data_size);
1264                                 if (view_entry->ve_hg->id_data[0] == '*') {
1265                                         ve->ve_all_hosts = 1;
1266                                 } else {
1267                                         bcopy(view_entry->ve_hg->id_data,
1268                                             ve->ve_host_group.name,
1269                                             view_entry->ve_hg->id_data_size);
1270                                         ve->ve_host_group.name_size =
1271                                             view_entry->ve_hg->id_data_size;
1272                                 }
1273 
1274                                 if (view_entry->ve_tg->id_data[0] == '*') {
1275                                         ve->ve_all_targets = 1;
1276                                 } else {
1277                                         bcopy(view_entry->ve_tg->id_data,
1278                                             ve->ve_target_group.name,
1279                                             view_entry->ve_tg->id_data_size);
1280                                         ve->ve_target_group.name_size =
1281                                             view_entry->ve_tg->id_data_size;
1282                                 }
1283                                 ve++;
1284                                 iocd->stmf_obuf_nentries++;
1285                         }
1286                         break;
1287                 }
1288                 mutex_exit(&stmf_state.stmf_lock);
1289                 break;
1290 
1291         case STMF_IOCTL_LOAD_PP_DATA:
1292                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1293                         ret = EACCES;
1294                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1295                         break;
1296                 }
1297                 ppi = (stmf_ppioctl_data_t *)ibuf;
1298                 if ((ppi == NULL) ||
1299                     (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1300                         ret = EINVAL;
1301                         break;
1302                 }
1303                 /* returned token */
1304                 ppi_token = (uint64_t *)obuf;
1305                 if ((ppi_token == NULL) ||
1306                     (iocd->stmf_obuf_size < sizeof (uint64_t))) {
1307                         ret = EINVAL;
1308                         break;
1309                 }
1310                 ret = stmf_load_ppd_ioctl(ppi, ppi_token, &iocd->stmf_error);
1311                 break;
1312 
1313         case STMF_IOCTL_GET_PP_DATA:
1314                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1315                         ret = EACCES;
1316                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1317                         break;
1318                 }
1319                 ppi = (stmf_ppioctl_data_t *)ibuf;
1320                 if (ppi == NULL ||
1321                     (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1322                         ret = EINVAL;
1323                         break;
1324                 }
1325                 ppi_out = (stmf_ppioctl_data_t *)obuf;
1326                 if ((ppi_out == NULL) ||
1327                     (iocd->stmf_obuf_size < sizeof (stmf_ppioctl_data_t))) {
1328                         ret = EINVAL;
1329                         break;
1330                 }
1331                 ret = stmf_get_ppd_ioctl(ppi, ppi_out, &iocd->stmf_error);
1332                 break;
1333 
1334         case STMF_IOCTL_CLEAR_PP_DATA:
1335                 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1336                         ret = EACCES;
1337                         iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1338                         break;
1339                 }
1340                 ppi = (stmf_ppioctl_data_t *)ibuf;
1341                 if ((ppi == NULL) ||
1342                     (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1343                         ret = EINVAL;
1344                         break;
1345                 }
1346                 ret = stmf_delete_ppd_ioctl(ppi);
1347                 break;
1348 
1349         case STMF_IOCTL_CLEAR_TRACE:
1350                 stmf_trace_clear();
1351                 break;
1352 
1353         case STMF_IOCTL_ADD_TRACE:
1354                 if (iocd->stmf_ibuf_size && ibuf) {
1355                         ((uint8_t *)ibuf)[iocd->stmf_ibuf_size - 1] = 0;
1356                         stmf_trace("\nstradm", "%s\n", ibuf);
1357                 }
1358                 break;
1359 
1360         case STMF_IOCTL_GET_TRACE_POSITION:
1361                 if (obuf && (iocd->stmf_obuf_size > 3)) {
1362                         mutex_enter(&trace_buf_lock);
1363                         *((int *)obuf) = trace_buf_curndx;
1364                         mutex_exit(&trace_buf_lock);
1365                 } else {
1366                         ret = EINVAL;
1367                 }
1368                 break;
1369 
1370         case STMF_IOCTL_GET_TRACE:
1371                 if ((iocd->stmf_obuf_size == 0) || (iocd->stmf_ibuf_size < 4)) {
1372                         ret = EINVAL;
1373                         break;
1374                 }
1375                 i = *((int *)ibuf);
1376                 if ((i > trace_buf_size) || ((i + iocd->stmf_obuf_size) >
1377                     trace_buf_size)) {
1378                         ret = EINVAL;
1379                         break;
1380                 }
1381                 mutex_enter(&trace_buf_lock);
1382                 bcopy(stmf_trace_buf + i, obuf, iocd->stmf_obuf_size);
1383                 mutex_exit(&trace_buf_lock);
1384                 break;
1385 
1386         default:
1387                 ret = ENOTTY;
1388         }
1389 
1390         if (ret == 0) {
1391                 ret = stmf_copyout_iocdata(data, mode, iocd, obuf);
1392         } else if (iocd->stmf_error) {
1393                 (void) stmf_copyout_iocdata(data, mode, iocd, obuf);
1394         }
1395         if (obuf) {
1396                 kmem_free(obuf, iocd->stmf_obuf_size);
1397                 obuf = NULL;
1398         }
1399         if (ibuf) {
1400                 kmem_free(ibuf, iocd->stmf_ibuf_size);
1401                 ibuf = NULL;
1402         }
1403         kmem_free(iocd, sizeof (stmf_iocdata_t));
1404         return (ret);
1405 }
1406 
1407 static int
1408 stmf_get_service_state()
1409 {
1410         stmf_i_local_port_t *ilport;
1411         stmf_i_lu_t *ilu;
1412         int online = 0;
1413         int offline = 0;
1414         int onlining = 0;
1415         int offlining = 0;
1416 
1417         ASSERT(mutex_owned(&stmf_state.stmf_lock));
1418         for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1419             ilport = ilport->ilport_next) {
1420                 if (ilport->ilport_state == STMF_STATE_OFFLINE)
1421                         offline++;
1422                 else if (ilport->ilport_state == STMF_STATE_ONLINE)
1423                         online++;
1424                 else if (ilport->ilport_state == STMF_STATE_ONLINING)
1425                         onlining++;
1426                 else if (ilport->ilport_state == STMF_STATE_OFFLINING)
1427                         offlining++;
1428         }
1429 
1430         for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1431             ilu = ilu->ilu_next) {
1432                 if (ilu->ilu_state == STMF_STATE_OFFLINE)
1433                         offline++;
1434                 else if (ilu->ilu_state == STMF_STATE_ONLINE)
1435                         online++;
1436                 else if (ilu->ilu_state == STMF_STATE_ONLINING)
1437                         onlining++;
1438                 else if (ilu->ilu_state == STMF_STATE_OFFLINING)
1439                         offlining++;
1440         }
1441 
1442         if (stmf_state.stmf_service_running) {
1443                 if (onlining)
1444                         return (STMF_STATE_ONLINING);
1445                 else
1446                         return (STMF_STATE_ONLINE);
1447         }
1448 
1449         if (offlining) {
1450                 return (STMF_STATE_OFFLINING);
1451         }
1452 
1453         return (STMF_STATE_OFFLINE);
1454 }
1455 
1456 static int
1457 stmf_set_stmf_state(stmf_state_desc_t *std)
1458 {
1459         stmf_i_local_port_t *ilport;
1460         stmf_i_lu_t *ilu;
1461         stmf_state_change_info_t ssi;
1462         int svc_state;
1463 
1464         ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
1465         ssi.st_additional_info = NULL;
1466 
1467         mutex_enter(&stmf_state.stmf_lock);
1468         if (!stmf_state.stmf_exclusive_open) {
1469                 mutex_exit(&stmf_state.stmf_lock);
1470                 return (EACCES);
1471         }
1472 
1473         if (stmf_state.stmf_inventory_locked) {
1474                 mutex_exit(&stmf_state.stmf_lock);
1475                 return (EBUSY);
1476         }
1477 
1478         if ((std->state != STMF_STATE_ONLINE) &&
1479             (std->state != STMF_STATE_OFFLINE)) {
1480                 mutex_exit(&stmf_state.stmf_lock);
1481                 return (EINVAL);
1482         }
1483 
1484         svc_state = stmf_get_service_state();
1485         if ((svc_state == STMF_STATE_OFFLINING) ||
1486             (svc_state == STMF_STATE_ONLINING)) {
1487                 mutex_exit(&stmf_state.stmf_lock);
1488                 return (EBUSY);
1489         }
1490 
1491         if (svc_state == STMF_STATE_OFFLINE) {
1492                 if (std->config_state == STMF_CONFIG_INIT) {
1493                         if (std->state != STMF_STATE_OFFLINE) {
1494                                 mutex_exit(&stmf_state.stmf_lock);
1495                                 return (EINVAL);
1496                         }
1497                         stmf_state.stmf_config_state = STMF_CONFIG_INIT;
1498                         stmf_delete_all_ppds();
1499                         stmf_view_clear_config();
1500                         stmf_view_init();
1501                         mutex_exit(&stmf_state.stmf_lock);
1502                         return (0);
1503                 }
1504                 if ((stmf_state.stmf_config_state == STMF_CONFIG_INIT) ||
1505                     (stmf_state.stmf_config_state == STMF_CONFIG_NONE)) {
1506                         if (std->config_state != STMF_CONFIG_INIT_DONE) {
1507                                 mutex_exit(&stmf_state.stmf_lock);
1508                                 return (EINVAL);
1509                         }
1510                         stmf_state.stmf_config_state = STMF_CONFIG_INIT_DONE;
1511                 }
1512                 if (std->state == STMF_STATE_OFFLINE) {
1513                         mutex_exit(&stmf_state.stmf_lock);
1514                         return (0);
1515                 }
1516                 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT) {
1517                         mutex_exit(&stmf_state.stmf_lock);
1518                         return (EINVAL);
1519                 }
1520                 stmf_state.stmf_inventory_locked = 1;
1521                 stmf_state.stmf_service_running = 1;
1522                 mutex_exit(&stmf_state.stmf_lock);
1523 
1524                 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1525                     ilport = ilport->ilport_next) {
1526                         if (stmf_state.stmf_default_lport_state !=
1527                             STMF_STATE_ONLINE)
1528                                 continue;
1529                         (void) stmf_ctl(STMF_CMD_LPORT_ONLINE,
1530                             ilport->ilport_lport, &ssi);
1531                 }
1532 
1533                 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1534                     ilu = ilu->ilu_next) {
1535                         if (stmf_state.stmf_default_lu_state !=
1536                             STMF_STATE_ONLINE)
1537                                 continue;
1538                         (void) stmf_ctl(STMF_CMD_LU_ONLINE, ilu->ilu_lu, &ssi);
1539                 }
1540                 mutex_enter(&stmf_state.stmf_lock);
1541                 stmf_state.stmf_inventory_locked = 0;
1542                 mutex_exit(&stmf_state.stmf_lock);
1543                 return (0);
1544         }
1545 
1546         /* svc_state is STMF_STATE_ONLINE here */
1547         if ((std->state != STMF_STATE_OFFLINE) ||
1548             (std->config_state == STMF_CONFIG_INIT)) {
1549                 mutex_exit(&stmf_state.stmf_lock);
1550                 return (EACCES);
1551         }
1552 
1553         stmf_state.stmf_inventory_locked = 1;
1554         stmf_state.stmf_service_running = 0;
1555 
1556         mutex_exit(&stmf_state.stmf_lock);
1557         for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1558             ilport = ilport->ilport_next) {
1559                 if (ilport->ilport_state != STMF_STATE_ONLINE)
1560                         continue;
1561                 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE,
1562                     ilport->ilport_lport, &ssi);
1563         }
1564 
1565         for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1566             ilu = ilu->ilu_next) {
1567                 if (ilu->ilu_state != STMF_STATE_ONLINE)
1568                         continue;
1569                 (void) stmf_ctl(STMF_CMD_LU_OFFLINE, ilu->ilu_lu, &ssi);
1570         }
1571         mutex_enter(&stmf_state.stmf_lock);
1572         stmf_state.stmf_inventory_locked = 0;
1573         mutex_exit(&stmf_state.stmf_lock);
1574         return (0);
1575 }
1576 
1577 static int
1578 stmf_get_stmf_state(stmf_state_desc_t *std)
1579 {
1580         mutex_enter(&stmf_state.stmf_lock);
1581         std->state = stmf_get_service_state();
1582         std->config_state = stmf_state.stmf_config_state;
1583         mutex_exit(&stmf_state.stmf_lock);
1584 
1585         return (0);
1586 }
1587 
1588 /*
1589  * handles registration message from pppt for a logical unit
1590  */
1591 stmf_status_t
1592 stmf_ic_lu_reg(stmf_ic_reg_dereg_lun_msg_t *msg, uint32_t type)
1593 {
1594         stmf_i_lu_provider_t    *ilp;
1595         stmf_lu_provider_t      *lp;
1596         mutex_enter(&stmf_state.stmf_lock);
1597         for (ilp = stmf_state.stmf_ilplist; ilp != NULL; ilp = ilp->ilp_next) {
1598                 if (strcmp(msg->icrl_lu_provider_name,
1599                     ilp->ilp_lp->lp_name) == 0) {
1600                         lp = ilp->ilp_lp;
1601                         mutex_exit(&stmf_state.stmf_lock);
1602                         lp->lp_proxy_msg(msg->icrl_lun_id, msg->icrl_cb_arg,
1603                             msg->icrl_cb_arg_len, type);
1604                         return (STMF_SUCCESS);
1605                 }
1606         }
1607         mutex_exit(&stmf_state.stmf_lock);
1608         return (STMF_SUCCESS);
1609 }
1610 
1611 /*
1612  * handles de-registration message from pppt for a logical unit
1613  */
1614 stmf_status_t
1615 stmf_ic_lu_dereg(stmf_ic_reg_dereg_lun_msg_t *msg)
1616 {
1617         stmf_i_lu_provider_t    *ilp;
1618         stmf_lu_provider_t      *lp;
1619         mutex_enter(&stmf_state.stmf_lock);
1620         for (ilp = stmf_state.stmf_ilplist; ilp != NULL; ilp = ilp->ilp_next) {
1621                 if (strcmp(msg->icrl_lu_provider_name,
1622                     ilp->ilp_lp->lp_name) == 0) {
1623                         lp = ilp->ilp_lp;
1624                         mutex_exit(&stmf_state.stmf_lock);
1625                         lp->lp_proxy_msg(msg->icrl_lun_id, NULL, 0,
1626                             STMF_MSG_LU_DEREGISTER);
1627                         return (STMF_SUCCESS);
1628                 }
1629         }
1630         mutex_exit(&stmf_state.stmf_lock);
1631         return (STMF_SUCCESS);
1632 }
1633 
1634 /*
1635  * helper function to find a task that matches a task_msgid
1636  */
1637 scsi_task_t *
1638 find_task_from_msgid(uint8_t *lu_id, stmf_ic_msgid_t task_msgid)
1639 {
1640         stmf_i_lu_t *ilu;
1641         stmf_i_scsi_task_t *itask;
1642 
1643         mutex_enter(&stmf_state.stmf_lock);
1644         for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
1645                 if (bcmp(lu_id, ilu->ilu_lu->lu_id->ident, 16) == 0) {
1646                         break;
1647                 }
1648         }
1649 
1650         if (ilu == NULL) {
1651                 mutex_exit(&stmf_state.stmf_lock);
1652                 return (NULL);
1653         }
1654 
1655         mutex_enter(&ilu->ilu_task_lock);
1656         for (itask = ilu->ilu_tasks; itask != NULL;
1657             itask = itask->itask_lu_next) {
1658                 if (itask->itask_flags & (ITASK_IN_FREE_LIST |
1659                     ITASK_BEING_ABORTED)) {
1660                         continue;
1661                 }
1662                 if (itask->itask_proxy_msg_id == task_msgid) {
1663                         break;
1664                 }
1665         }
1666         mutex_exit(&ilu->ilu_task_lock);
1667         mutex_exit(&stmf_state.stmf_lock);
1668 
1669         if (itask != NULL) {
1670                 return (itask->itask_task);
1671         } else {
1672                 /* task not found. Likely already aborted. */
1673                 return (NULL);
1674         }
1675 }
1676 
1677 /*
1678  * message received from pppt/ic
1679  */
1680 stmf_status_t
1681 stmf_msg_rx(stmf_ic_msg_t *msg)
1682 {
1683         mutex_enter(&stmf_state.stmf_lock);
1684         if (stmf_state.stmf_alua_state != 1) {
1685                 mutex_exit(&stmf_state.stmf_lock);
1686                 cmn_err(CE_WARN, "stmf alua state is disabled");
1687                 ic_msg_free(msg);
1688                 return (STMF_FAILURE);
1689         }
1690         mutex_exit(&stmf_state.stmf_lock);
1691 
1692         switch (msg->icm_msg_type) {
1693                 case STMF_ICM_REGISTER_LUN:
1694                         (void) stmf_ic_lu_reg(
1695                             (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg,
1696                             STMF_MSG_LU_REGISTER);
1697                         break;
1698                 case STMF_ICM_LUN_ACTIVE:
1699                         (void) stmf_ic_lu_reg(
1700                             (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg,
1701                             STMF_MSG_LU_ACTIVE);
1702                         break;
1703                 case STMF_ICM_DEREGISTER_LUN:
1704                         (void) stmf_ic_lu_dereg(
1705                             (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg);
1706                         break;
1707                 case STMF_ICM_SCSI_DATA:
1708                         (void) stmf_ic_rx_scsi_data(
1709                             (stmf_ic_scsi_data_msg_t *)msg->icm_msg);
1710                         break;
1711                 case STMF_ICM_SCSI_STATUS:
1712                         (void) stmf_ic_rx_scsi_status(
1713                             (stmf_ic_scsi_status_msg_t *)msg->icm_msg);
1714                         break;
1715                 case STMF_ICM_STATUS:
1716                         (void) stmf_ic_rx_status(
1717                             (stmf_ic_status_msg_t *)msg->icm_msg);
1718                         break;
1719                 default:
1720                         cmn_err(CE_WARN, "unknown message received %d",
1721                             msg->icm_msg_type);
1722                         ic_msg_free(msg);
1723                         return (STMF_FAILURE);
1724         }
1725         ic_msg_free(msg);
1726         return (STMF_SUCCESS);
1727 }
1728 
1729 stmf_status_t
1730 stmf_ic_rx_status(stmf_ic_status_msg_t *msg)
1731 {
1732         stmf_i_local_port_t *ilport;
1733 
1734         if (msg->ics_msg_type != STMF_ICM_REGISTER_PROXY_PORT) {
1735                 /* for now, ignore other message status */
1736                 return (STMF_SUCCESS);
1737         }
1738 
1739         if (msg->ics_status != STMF_SUCCESS) {
1740                 return (STMF_SUCCESS);
1741         }
1742 
1743         mutex_enter(&stmf_state.stmf_lock);
1744         for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1745             ilport = ilport->ilport_next) {
1746                 if (msg->ics_msgid == ilport->ilport_reg_msgid) {
1747                         ilport->ilport_proxy_registered = 1;
1748                         break;
1749                 }
1750         }
1751         mutex_exit(&stmf_state.stmf_lock);
1752         return (STMF_SUCCESS);
1753 }
1754 
1755 /*
1756  * handles scsi status message from pppt
1757  */
1758 stmf_status_t
1759 stmf_ic_rx_scsi_status(stmf_ic_scsi_status_msg_t *msg)
1760 {
1761         scsi_task_t *task;
1762 
1763         /* is this a task management command */
1764         if (msg->icss_task_msgid & MSG_ID_TM_BIT) {
1765                 return (STMF_SUCCESS);
1766         }
1767 
1768         task = find_task_from_msgid(msg->icss_lun_id, msg->icss_task_msgid);
1769 
1770         if (task == NULL) {
1771                 return (STMF_SUCCESS);
1772         }
1773 
1774         task->task_scsi_status = msg->icss_status;
1775         task->task_sense_data = msg->icss_sense;
1776         task->task_sense_length = msg->icss_sense_len;
1777         (void) stmf_send_scsi_status(task, STMF_IOF_LU_DONE);
1778 
1779         return (STMF_SUCCESS);
1780 }
1781 
1782 /*
1783  * handles scsi data message from pppt
1784  */
1785 stmf_status_t
1786 stmf_ic_rx_scsi_data(stmf_ic_scsi_data_msg_t *msg)
1787 {
1788         stmf_i_scsi_task_t *itask;
1789         scsi_task_t *task;
1790         stmf_xfer_data_t *xd = NULL;
1791         stmf_data_buf_t *dbuf;
1792         uint32_t sz, minsz, xd_sz, asz;
1793 
1794         /* is this a task management command */
1795         if (msg->icsd_task_msgid & MSG_ID_TM_BIT) {
1796                 return (STMF_SUCCESS);
1797         }
1798 
1799         task = find_task_from_msgid(msg->icsd_lun_id, msg->icsd_task_msgid);
1800         if (task == NULL) {
1801                 stmf_ic_msg_t *ic_xfer_done_msg = NULL;
1802                 static uint64_t data_msg_id;
1803                 stmf_status_t ic_ret = STMF_FAILURE;
1804                 mutex_enter(&stmf_state.stmf_lock);
1805                 data_msg_id = stmf_proxy_msg_id++;
1806                 mutex_exit(&stmf_state.stmf_lock);
1807                 /*
1808                  * send xfer done status to pppt
1809                  * for now, set the session id to 0 as we cannot
1810                  * ascertain it since we cannot find the task
1811                  */
1812                 ic_xfer_done_msg = ic_scsi_data_xfer_done_msg_alloc(
1813                     msg->icsd_task_msgid, 0, STMF_FAILURE, data_msg_id);
1814                 if (ic_xfer_done_msg) {
1815                         ic_ret = ic_tx_msg(ic_xfer_done_msg);
1816                         if (ic_ret != STMF_IC_MSG_SUCCESS) {
1817                                 cmn_err(CE_WARN, "unable to xmit proxy msg");
1818                         }
1819                 }
1820                 return (STMF_FAILURE);
1821         }
1822 
1823         itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
1824         dbuf = itask->itask_proxy_dbuf;
1825 
1826         task->task_cmd_xfer_length += msg->icsd_data_len;
1827 
1828         if (task->task_additional_flags &
1829             TASK_AF_NO_EXPECTED_XFER_LENGTH) {
1830                 task->task_expected_xfer_length =
1831                     task->task_cmd_xfer_length;
1832         }
1833 
1834         sz = min(task->task_expected_xfer_length,
1835             task->task_cmd_xfer_length);
1836 
1837         xd_sz = msg->icsd_data_len;
1838         asz = xd_sz + sizeof (*xd) - 4;
1839         xd = (stmf_xfer_data_t *)kmem_zalloc(asz, KM_NOSLEEP);
1840 
1841         if (xd == NULL) {
1842                 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
1843                     STMF_ALLOC_FAILURE, NULL);
1844                 return (STMF_FAILURE);
1845         }
1846 
1847         xd->alloc_size = asz;
1848         xd->size_left = xd_sz;
1849         bcopy(msg->icsd_data, xd->buf, xd_sz);
1850 
1851         sz = min(sz, xd->size_left);
1852         xd->size_left = sz;
1853         minsz = min(512, sz);
1854 
1855         if (dbuf == NULL)
1856                 dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
1857         if (dbuf == NULL) {
1858                 kmem_free(xd, xd->alloc_size);
1859                 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
1860                     STMF_ALLOC_FAILURE, NULL);
1861                 return (STMF_FAILURE);
1862         }
1863         dbuf->db_lu_private = xd;
1864         dbuf->db_relative_offset = task->task_nbytes_transferred;
1865         stmf_xd_to_dbuf(dbuf, 0);
1866 
1867         dbuf->db_flags = DB_DIRECTION_TO_RPORT;
1868         (void) stmf_xfer_data(task, dbuf, 0);
1869         return (STMF_SUCCESS);
1870 }
1871 
1872 stmf_status_t
1873 stmf_proxy_scsi_cmd(scsi_task_t *task, stmf_data_buf_t *dbuf)
1874 {
1875         stmf_i_scsi_task_t *itask =
1876             (stmf_i_scsi_task_t *)task->task_stmf_private;
1877         stmf_i_local_port_t *ilport =
1878             (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
1879         stmf_ic_msg_t *ic_cmd_msg;
1880         stmf_ic_msg_status_t ic_ret;
1881         stmf_status_t ret = STMF_FAILURE;
1882 
1883         if (stmf_state.stmf_alua_state != 1) {
1884                 cmn_err(CE_WARN, "stmf alua state is disabled");
1885                 return (STMF_FAILURE);
1886         }
1887 
1888         if (ilport->ilport_proxy_registered == 0) {
1889                 return (STMF_FAILURE);
1890         }
1891 
1892         mutex_enter(&stmf_state.stmf_lock);
1893         itask->itask_proxy_msg_id = stmf_proxy_msg_id++;
1894         mutex_exit(&stmf_state.stmf_lock);
1895         itask->itask_proxy_dbuf = dbuf;
1896 
1897         /*
1898          * stmf will now take over the task handling for this task
1899          * but it still needs to be treated differently from other
1900          * default handled tasks, hence the ITASK_PROXY_TASK.
1901          * If this is a task management function, we're really just
1902          * duping the command to the peer. Set the TM bit so that
1903          * we can recognize this on return since we won't be completing
1904          * the proxied task in that case.
1905          */
1906         if (task->task_mgmt_function) {
1907                 itask->itask_proxy_msg_id |= MSG_ID_TM_BIT;
1908         } else {
1909                 uint32_t new, old;
1910                 do {
1911                         new = old = itask->itask_flags;
1912                         if (new & ITASK_BEING_ABORTED)
1913                                 return (STMF_FAILURE);
1914                         new |= ITASK_DEFAULT_HANDLING | ITASK_PROXY_TASK;
1915                 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
1916         }
1917         if (dbuf) {
1918                 ic_cmd_msg = ic_scsi_cmd_msg_alloc(itask->itask_proxy_msg_id,
1919                     task, dbuf->db_data_size, dbuf->db_sglist[0].seg_addr,
1920                     itask->itask_proxy_msg_id);
1921         } else {
1922                 ic_cmd_msg = ic_scsi_cmd_msg_alloc(itask->itask_proxy_msg_id,
1923                     task, 0, NULL, itask->itask_proxy_msg_id);
1924         }
1925         if (ic_cmd_msg) {
1926                 ic_ret = ic_tx_msg(ic_cmd_msg);
1927                 if (ic_ret == STMF_IC_MSG_SUCCESS) {
1928                         ret = STMF_SUCCESS;
1929                 }
1930         }
1931         return (ret);
1932 }
1933 
1934 
1935 stmf_status_t
1936 pppt_modload()
1937 {
1938         int error;
1939 
1940         if (pppt_mod == NULL && ((pppt_mod =
1941             ddi_modopen("drv/pppt", KRTLD_MODE_FIRST, &error)) == NULL)) {
1942                 cmn_err(CE_WARN, "Unable to load pppt");
1943                 return (STMF_FAILURE);
1944         }
1945 
1946         if (ic_reg_port_msg_alloc == NULL && ((ic_reg_port_msg_alloc =
1947             (stmf_ic_reg_port_msg_alloc_func_t)
1948             ddi_modsym(pppt_mod, "stmf_ic_reg_port_msg_alloc",
1949             &error)) == NULL)) {
1950                 cmn_err(CE_WARN,
1951                     "Unable to find symbol - stmf_ic_reg_port_msg_alloc");
1952                 return (STMF_FAILURE);
1953         }
1954 
1955 
1956         if (ic_dereg_port_msg_alloc == NULL && ((ic_dereg_port_msg_alloc =
1957             (stmf_ic_dereg_port_msg_alloc_func_t)
1958             ddi_modsym(pppt_mod, "stmf_ic_dereg_port_msg_alloc",
1959             &error)) == NULL)) {
1960                 cmn_err(CE_WARN,
1961                     "Unable to find symbol - stmf_ic_dereg_port_msg_alloc");
1962                 return (STMF_FAILURE);
1963         }
1964 
1965         if (ic_reg_lun_msg_alloc == NULL && ((ic_reg_lun_msg_alloc =
1966             (stmf_ic_reg_lun_msg_alloc_func_t)
1967             ddi_modsym(pppt_mod, "stmf_ic_reg_lun_msg_alloc",
1968             &error)) == NULL)) {
1969                 cmn_err(CE_WARN,
1970                     "Unable to find symbol - stmf_ic_reg_lun_msg_alloc");
1971                 return (STMF_FAILURE);
1972         }
1973 
1974         if (ic_lun_active_msg_alloc == NULL && ((ic_lun_active_msg_alloc =
1975             (stmf_ic_lun_active_msg_alloc_func_t)
1976             ddi_modsym(pppt_mod, "stmf_ic_lun_active_msg_alloc",
1977             &error)) == NULL)) {
1978                 cmn_err(CE_WARN,
1979                     "Unable to find symbol - stmf_ic_lun_active_msg_alloc");
1980                 return (STMF_FAILURE);
1981         }
1982 
1983         if (ic_dereg_lun_msg_alloc == NULL && ((ic_dereg_lun_msg_alloc =
1984             (stmf_ic_dereg_lun_msg_alloc_func_t)
1985             ddi_modsym(pppt_mod, "stmf_ic_dereg_lun_msg_alloc",
1986             &error)) == NULL)) {
1987                 cmn_err(CE_WARN,
1988                     "Unable to find symbol - stmf_ic_dereg_lun_msg_alloc");
1989                 return (STMF_FAILURE);
1990         }
1991 
1992         if (ic_scsi_cmd_msg_alloc == NULL && ((ic_scsi_cmd_msg_alloc =
1993             (stmf_ic_scsi_cmd_msg_alloc_func_t)
1994             ddi_modsym(pppt_mod, "stmf_ic_scsi_cmd_msg_alloc",
1995             &error)) == NULL)) {
1996                 cmn_err(CE_WARN,
1997                     "Unable to find symbol - stmf_ic_scsi_cmd_msg_alloc");
1998                 return (STMF_FAILURE);
1999         }
2000 
2001         if (ic_scsi_data_xfer_done_msg_alloc == NULL &&
2002             ((ic_scsi_data_xfer_done_msg_alloc =
2003             (stmf_ic_scsi_data_xfer_done_msg_alloc_func_t)
2004             ddi_modsym(pppt_mod, "stmf_ic_scsi_data_xfer_done_msg_alloc",
2005             &error)) == NULL)) {
2006                 cmn_err(CE_WARN,
2007                     "Unable to find symbol -"
2008                     "stmf_ic_scsi_data_xfer_done_msg_alloc");
2009                 return (STMF_FAILURE);
2010         }
2011 
2012         if (ic_session_reg_msg_alloc == NULL &&
2013             ((ic_session_reg_msg_alloc =
2014             (stmf_ic_session_create_msg_alloc_func_t)
2015             ddi_modsym(pppt_mod, "stmf_ic_session_create_msg_alloc",
2016             &error)) == NULL)) {
2017                 cmn_err(CE_WARN,
2018                     "Unable to find symbol -"
2019                     "stmf_ic_session_create_msg_alloc");
2020                 return (STMF_FAILURE);
2021         }
2022 
2023         if (ic_session_dereg_msg_alloc == NULL &&
2024             ((ic_session_dereg_msg_alloc =
2025             (stmf_ic_session_destroy_msg_alloc_func_t)
2026             ddi_modsym(pppt_mod, "stmf_ic_session_destroy_msg_alloc",
2027             &error)) == NULL)) {
2028                 cmn_err(CE_WARN,
2029                     "Unable to find symbol -"
2030                     "stmf_ic_session_destroy_msg_alloc");
2031                 return (STMF_FAILURE);
2032         }
2033 
2034         if (ic_tx_msg == NULL && ((ic_tx_msg =
2035             (stmf_ic_tx_msg_func_t)ddi_modsym(pppt_mod, "stmf_ic_tx_msg",
2036             &error)) == NULL)) {
2037                 cmn_err(CE_WARN, "Unable to find symbol - stmf_ic_tx_msg");
2038                 return (STMF_FAILURE);
2039         }
2040 
2041         if (ic_msg_free == NULL && ((ic_msg_free =
2042             (stmf_ic_msg_free_func_t)ddi_modsym(pppt_mod, "stmf_ic_msg_free",
2043             &error)) == NULL)) {
2044                 cmn_err(CE_WARN, "Unable to find symbol - stmf_ic_msg_free");
2045                 return (STMF_FAILURE);
2046         }
2047         return (STMF_SUCCESS);
2048 }
2049 
2050 static void
2051 stmf_get_alua_state(stmf_alua_state_desc_t *alua_state)
2052 {
2053         mutex_enter(&stmf_state.stmf_lock);
2054         alua_state->alua_node = stmf_state.stmf_alua_node;
2055         alua_state->alua_state = stmf_state.stmf_alua_state;
2056         mutex_exit(&stmf_state.stmf_lock);
2057 }
2058 
2059 
2060 static int
2061 stmf_set_alua_state(stmf_alua_state_desc_t *alua_state)
2062 {
2063         stmf_i_local_port_t *ilport;
2064         stmf_i_lu_t *ilu;
2065         stmf_lu_t *lu;
2066         stmf_ic_msg_status_t ic_ret;
2067         stmf_ic_msg_t *ic_reg_lun, *ic_reg_port;
2068         stmf_local_port_t *lport;
2069         int ret = 0;
2070 
2071         if (alua_state->alua_state > 1 || alua_state->alua_node > 1) {
2072                 return (EINVAL);
2073         }
2074 
2075         mutex_enter(&stmf_state.stmf_lock);
2076         if (alua_state->alua_state == 1) {
2077                 if (pppt_modload() == STMF_FAILURE) {
2078                         ret = EIO;
2079                         goto err;
2080                 }
2081                 if (alua_state->alua_node != 0) {
2082                         /* reset existing rtpids to new base */
2083                         stmf_rtpid_counter = 255;
2084                 }
2085                 stmf_state.stmf_alua_node = alua_state->alua_node;
2086                 stmf_state.stmf_alua_state = 1;
2087                 /* register existing local ports with ppp */
2088                 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
2089                     ilport = ilport->ilport_next) {
2090                         /* skip standby ports and non-alua participants */
2091                         if (ilport->ilport_standby == 1 ||
2092                             ilport->ilport_alua == 0) {
2093                                 continue;
2094                         }
2095                         if (alua_state->alua_node != 0) {
2096                                 ilport->ilport_rtpid =
2097                                     atomic_inc_16_nv(&stmf_rtpid_counter);
2098                         }
2099                         lport = ilport->ilport_lport;
2100                         ic_reg_port = ic_reg_port_msg_alloc(
2101                             lport->lport_id, ilport->ilport_rtpid,
2102                             0, NULL, stmf_proxy_msg_id);
2103                         if (ic_reg_port) {
2104                                 ic_ret = ic_tx_msg(ic_reg_port);
2105                                 if (ic_ret == STMF_IC_MSG_SUCCESS) {
2106                                         ilport->ilport_reg_msgid =
2107                                             stmf_proxy_msg_id++;
2108                                 } else {
2109                                         cmn_err(CE_WARN,
2110                                             "error on port registration "
2111                                             "port - %s",
2112                                             ilport->ilport_kstat_tgt_name);
2113                                 }
2114                         }
2115                 }
2116                 /* register existing logical units */
2117                 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
2118                     ilu = ilu->ilu_next) {
2119                         if (ilu->ilu_access != STMF_LU_ACTIVE) {
2120                                 continue;
2121                         }
2122                         /* register with proxy module */
2123                         lu = ilu->ilu_lu;
2124                         if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
2125                             lu->lu_lp->lp_alua_support) {
2126                                 ilu->ilu_alua = 1;
2127                                 /* allocate the register message */
2128                                 ic_reg_lun = ic_reg_lun_msg_alloc(
2129                                     lu->lu_id->ident, lu->lu_lp->lp_name,
2130                                     lu->lu_proxy_reg_arg_len,
2131                                     (uint8_t *)lu->lu_proxy_reg_arg,
2132                                     stmf_proxy_msg_id);
2133                                 /* send the message */
2134                                 if (ic_reg_lun) {
2135                                         ic_ret = ic_tx_msg(ic_reg_lun);
2136                                         if (ic_ret == STMF_IC_MSG_SUCCESS) {
2137                                                 stmf_proxy_msg_id++;
2138                                         }
2139                                 }
2140                         }
2141                 }
2142         } else {
2143                 stmf_state.stmf_alua_state = 0;
2144         }
2145 
2146 err:
2147         mutex_exit(&stmf_state.stmf_lock);
2148         return (ret);
2149 }
2150 
2151 
2152 typedef struct {
2153         void    *bp;    /* back pointer from internal struct to main struct */
2154         int     alloc_size;
2155 } __istmf_t;
2156 
2157 typedef struct {
2158         __istmf_t       *fp;    /* Framework private */
2159         void            *cp;    /* Caller private */
2160         void            *ss;    /* struct specific */
2161 } __stmf_t;
2162 
2163 static struct {
2164         int shared;
2165         int fw_private;
2166 } stmf_sizes[] = { { 0, 0 },
2167         { GET_STRUCT_SIZE(stmf_lu_provider_t),
2168                 GET_STRUCT_SIZE(stmf_i_lu_provider_t) },
2169         { GET_STRUCT_SIZE(stmf_port_provider_t),
2170                 GET_STRUCT_SIZE(stmf_i_port_provider_t) },
2171         { GET_STRUCT_SIZE(stmf_local_port_t),
2172                 GET_STRUCT_SIZE(stmf_i_local_port_t) },
2173         { GET_STRUCT_SIZE(stmf_lu_t),
2174                 GET_STRUCT_SIZE(stmf_i_lu_t) },
2175         { GET_STRUCT_SIZE(stmf_scsi_session_t),
2176                 GET_STRUCT_SIZE(stmf_i_scsi_session_t) },
2177         { GET_STRUCT_SIZE(scsi_task_t),
2178                 GET_STRUCT_SIZE(stmf_i_scsi_task_t) },
2179         { GET_STRUCT_SIZE(stmf_data_buf_t),
2180                 GET_STRUCT_SIZE(__istmf_t) },
2181         { GET_STRUCT_SIZE(stmf_dbuf_store_t),
2182                 GET_STRUCT_SIZE(__istmf_t) }
2183 
2184 };
2185 
2186 void *
2187 stmf_alloc(stmf_struct_id_t struct_id, int additional_size, int flags)
2188 {
2189         int stmf_size;
2190         int kmem_flag;
2191         __stmf_t *sh;
2192 
2193         if ((struct_id == 0) || (struct_id >= STMF_MAX_STRUCT_IDS))
2194                 return (NULL);
2195 
2196         if ((curthread->t_flag & T_INTR_THREAD) || (flags & AF_FORCE_NOSLEEP)) {
2197                 kmem_flag = KM_NOSLEEP;
2198         } else {
2199                 kmem_flag = KM_SLEEP;
2200         }
2201 
2202         additional_size = (additional_size + 7) & (~7);
2203         stmf_size = stmf_sizes[struct_id].shared +
2204             stmf_sizes[struct_id].fw_private + additional_size;
2205 
2206         if (flags & AF_DONTZERO)
2207                 sh = (__stmf_t *)kmem_alloc(stmf_size, kmem_flag);
2208         else
2209                 sh = (__stmf_t *)kmem_zalloc(stmf_size, kmem_flag);
2210 
2211         if (sh == NULL)
2212                 return (NULL);
2213 
2214         /*
2215          * In principle, the implementation inside stmf_alloc should not
2216          * be changed anyway. But the original order of framework private
2217          * data and caller private data does not support sglist in the caller
2218          * private data.
2219          * To work around this, the memory segments of framework private
2220          * data and caller private data are re-ordered here.
2221          * A better solution is to provide a specific interface to allocate
2222          * the sglist, then we will not need this workaround any more.
2223          * But before the new interface is available, the memory segment
2224          * ordering should be kept as is.
2225          */
2226         sh->cp = GET_BYTE_OFFSET(sh, stmf_sizes[struct_id].shared);
2227         sh->fp = (__istmf_t *)GET_BYTE_OFFSET(sh,
2228             stmf_sizes[struct_id].shared + additional_size);
2229 
2230         sh->fp->bp = sh;
2231         /* Just store the total size instead of storing additional size */
2232         sh->fp->alloc_size = stmf_size;
2233 
2234         return (sh);
2235 }
2236 
2237 void
2238 stmf_free(void *ptr)
2239 {
2240         __stmf_t *sh = (__stmf_t *)ptr;
2241 
2242         /*
2243          * So far we dont need any struct specific processing. If such
2244          * a need ever arises, then store the struct id in the framework
2245          * private section and get it here as sh->fp->struct_id.
2246          */
2247         kmem_free(ptr, sh->fp->alloc_size);
2248 }
2249 
2250 /*
2251  * Given a pointer to stmf_lu_t, verifies if this lu is registered with the
2252  * framework and returns a pointer to framework private data for the lu.
2253  * Returns NULL if the lu was not found.
2254  */
2255 stmf_i_lu_t *
2256 stmf_lookup_lu(stmf_lu_t *lu)
2257 {
2258         stmf_i_lu_t *ilu;
2259         ASSERT(mutex_owned(&stmf_state.stmf_lock));
2260 
2261         for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
2262                 if (ilu->ilu_lu == lu)
2263                         return (ilu);
2264         }
2265         return (NULL);
2266 }
2267 
2268 /*
2269  * Given a pointer to stmf_local_port_t, verifies if this lport is registered
2270  * with the framework and returns a pointer to framework private data for
2271  * the lport.
2272  * Returns NULL if the lport was not found.
2273  */
2274 stmf_i_local_port_t *
2275 stmf_lookup_lport(stmf_local_port_t *lport)
2276 {
2277         stmf_i_local_port_t *ilport;
2278         ASSERT(mutex_owned(&stmf_state.stmf_lock));
2279 
2280         for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
2281             ilport = ilport->ilport_next) {
2282                 if (ilport->ilport_lport == lport)
2283                         return (ilport);
2284         }
2285         return (NULL);
2286 }
2287 
2288 stmf_status_t
2289 stmf_register_lu_provider(stmf_lu_provider_t *lp)
2290 {
2291         stmf_i_lu_provider_t *ilp = (stmf_i_lu_provider_t *)lp->lp_stmf_private;
2292         stmf_pp_data_t *ppd;
2293         uint32_t cb_flags;
2294 
2295         if (lp->lp_lpif_rev != LPIF_REV_1 && lp->lp_lpif_rev != LPIF_REV_2)
2296                 return (STMF_FAILURE);
2297 
2298         mutex_enter(&stmf_state.stmf_lock);
2299         ilp->ilp_next = stmf_state.stmf_ilplist;
2300         stmf_state.stmf_ilplist = ilp;
2301         stmf_state.stmf_nlps++;
2302 
2303         /* See if we need to do a callback */
2304         for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2305                 if (strcmp(ppd->ppd_name, lp->lp_name) == 0) {
2306                         break;
2307                 }
2308         }
2309         if ((ppd == NULL) || (ppd->ppd_nv == NULL)) {
2310                 goto rlp_bail_out;
2311         }
2312         ilp->ilp_ppd = ppd;
2313         ppd->ppd_provider = ilp;
2314         if (lp->lp_cb == NULL)
2315                 goto rlp_bail_out;
2316         ilp->ilp_cb_in_progress = 1;
2317         cb_flags = STMF_PCB_PREG_COMPLETE;
2318         if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2319                 cb_flags |= STMF_PCB_STMF_ONLINING;
2320         mutex_exit(&stmf_state.stmf_lock);
2321         lp->lp_cb(lp, STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2322         mutex_enter(&stmf_state.stmf_lock);
2323         ilp->ilp_cb_in_progress = 0;
2324 
2325 rlp_bail_out:
2326         mutex_exit(&stmf_state.stmf_lock);
2327 
2328         return (STMF_SUCCESS);
2329 }
2330 
2331 stmf_status_t
2332 stmf_deregister_lu_provider(stmf_lu_provider_t *lp)
2333 {
2334         stmf_i_lu_provider_t    **ppilp;
2335         stmf_i_lu_provider_t *ilp = (stmf_i_lu_provider_t *)lp->lp_stmf_private;
2336 
2337         mutex_enter(&stmf_state.stmf_lock);
2338         if (ilp->ilp_nlus || ilp->ilp_cb_in_progress) {
2339                 mutex_exit(&stmf_state.stmf_lock);
2340                 return (STMF_BUSY);
2341         }
2342         for (ppilp = &stmf_state.stmf_ilplist; *ppilp != NULL;
2343             ppilp = &((*ppilp)->ilp_next)) {
2344                 if (*ppilp == ilp) {
2345                         *ppilp = ilp->ilp_next;
2346                         stmf_state.stmf_nlps--;
2347                         if (ilp->ilp_ppd) {
2348                                 ilp->ilp_ppd->ppd_provider = NULL;
2349                                 ilp->ilp_ppd = NULL;
2350                         }
2351                         mutex_exit(&stmf_state.stmf_lock);
2352                         return (STMF_SUCCESS);
2353                 }
2354         }
2355         mutex_exit(&stmf_state.stmf_lock);
2356         return (STMF_NOT_FOUND);
2357 }
2358 
2359 stmf_status_t
2360 stmf_register_port_provider(stmf_port_provider_t *pp)
2361 {
2362         stmf_i_port_provider_t *ipp =
2363             (stmf_i_port_provider_t *)pp->pp_stmf_private;
2364         stmf_pp_data_t *ppd;
2365         uint32_t cb_flags;
2366 
2367         if (pp->pp_portif_rev != PORTIF_REV_1)
2368                 return (STMF_FAILURE);
2369 
2370         mutex_enter(&stmf_state.stmf_lock);
2371         ipp->ipp_next = stmf_state.stmf_ipplist;
2372         stmf_state.stmf_ipplist = ipp;
2373         stmf_state.stmf_npps++;
2374         /* See if we need to do a callback */
2375         for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2376                 if (strcmp(ppd->ppd_name, pp->pp_name) == 0) {
2377                         break;
2378                 }
2379         }
2380         if ((ppd == NULL) || (ppd->ppd_nv == NULL)) {
2381                 goto rpp_bail_out;
2382         }
2383         ipp->ipp_ppd = ppd;
2384         ppd->ppd_provider = ipp;
2385         if (pp->pp_cb == NULL)
2386                 goto rpp_bail_out;
2387         ipp->ipp_cb_in_progress = 1;
2388         cb_flags = STMF_PCB_PREG_COMPLETE;
2389         if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2390                 cb_flags |= STMF_PCB_STMF_ONLINING;
2391         mutex_exit(&stmf_state.stmf_lock);
2392         pp->pp_cb(pp, STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2393         mutex_enter(&stmf_state.stmf_lock);
2394         ipp->ipp_cb_in_progress = 0;
2395 
2396 rpp_bail_out:
2397         mutex_exit(&stmf_state.stmf_lock);
2398 
2399         return (STMF_SUCCESS);
2400 }
2401 
2402 stmf_status_t
2403 stmf_deregister_port_provider(stmf_port_provider_t *pp)
2404 {
2405         stmf_i_port_provider_t *ipp =
2406             (stmf_i_port_provider_t *)pp->pp_stmf_private;
2407         stmf_i_port_provider_t **ppipp;
2408 
2409         mutex_enter(&stmf_state.stmf_lock);
2410         if (ipp->ipp_npps || ipp->ipp_cb_in_progress) {
2411                 mutex_exit(&stmf_state.stmf_lock);
2412                 return (STMF_BUSY);
2413         }
2414         for (ppipp = &stmf_state.stmf_ipplist; *ppipp != NULL;
2415             ppipp = &((*ppipp)->ipp_next)) {
2416                 if (*ppipp == ipp) {
2417                         *ppipp = ipp->ipp_next;
2418                         stmf_state.stmf_npps--;
2419                         if (ipp->ipp_ppd) {
2420                                 ipp->ipp_ppd->ppd_provider = NULL;
2421                                 ipp->ipp_ppd = NULL;
2422                         }
2423                         mutex_exit(&stmf_state.stmf_lock);
2424                         return (STMF_SUCCESS);
2425                 }
2426         }
2427         mutex_exit(&stmf_state.stmf_lock);
2428         return (STMF_NOT_FOUND);
2429 }
2430 
2431 int
2432 stmf_load_ppd_ioctl(stmf_ppioctl_data_t *ppi, uint64_t *ppi_token,
2433     uint32_t *err_ret)
2434 {
2435         stmf_i_port_provider_t          *ipp;
2436         stmf_i_lu_provider_t            *ilp;
2437         stmf_pp_data_t                  *ppd;
2438         nvlist_t                        *nv;
2439         int                             s;
2440         int                             ret;
2441 
2442         *err_ret = 0;
2443 
2444         if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2445                 return (EINVAL);
2446         }
2447 
2448         mutex_enter(&stmf_state.stmf_lock);
2449         for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2450                 if (ppi->ppi_lu_provider) {
2451                         if (!ppd->ppd_lu_provider)
2452                                 continue;
2453                 } else if (ppi->ppi_port_provider) {
2454                         if (!ppd->ppd_port_provider)
2455                                 continue;
2456                 }
2457                 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2458                         break;
2459         }
2460 
2461         if (ppd == NULL) {
2462                 /* New provider */
2463                 s = strlen(ppi->ppi_name);
2464                 if (s > 254) {
2465                         mutex_exit(&stmf_state.stmf_lock);
2466                         return (EINVAL);
2467                 }
2468                 s += sizeof (stmf_pp_data_t) - 7;
2469 
2470                 ppd = kmem_zalloc(s, KM_NOSLEEP);
2471                 if (ppd == NULL) {
2472                         mutex_exit(&stmf_state.stmf_lock);
2473                         return (ENOMEM);
2474                 }
2475                 ppd->ppd_alloc_size = s;
2476                 (void) strcpy(ppd->ppd_name, ppi->ppi_name);
2477 
2478                 /* See if this provider already exists */
2479                 if (ppi->ppi_lu_provider) {
2480                         ppd->ppd_lu_provider = 1;
2481                         for (ilp = stmf_state.stmf_ilplist; ilp != NULL;
2482                             ilp = ilp->ilp_next) {
2483                                 if (strcmp(ppi->ppi_name,
2484                                     ilp->ilp_lp->lp_name) == 0) {
2485                                         ppd->ppd_provider = ilp;
2486                                         ilp->ilp_ppd = ppd;
2487                                         break;
2488                                 }
2489                         }
2490                 } else {
2491                         ppd->ppd_port_provider = 1;
2492                         for (ipp = stmf_state.stmf_ipplist; ipp != NULL;
2493                             ipp = ipp->ipp_next) {
2494                                 if (strcmp(ppi->ppi_name,
2495                                     ipp->ipp_pp->pp_name) == 0) {
2496                                         ppd->ppd_provider = ipp;
2497                                         ipp->ipp_ppd = ppd;
2498                                         break;
2499                                 }
2500                         }
2501                 }
2502 
2503                 /* Link this ppd in */
2504                 ppd->ppd_next = stmf_state.stmf_ppdlist;
2505                 stmf_state.stmf_ppdlist = ppd;
2506         }
2507 
2508         /*
2509          * User is requesting that the token be checked.
2510          * If there was another set after the user's get
2511          * it's an error
2512          */
2513         if (ppi->ppi_token_valid) {
2514                 if (ppi->ppi_token != ppd->ppd_token) {
2515                         *err_ret = STMF_IOCERR_PPD_UPDATED;
2516                         mutex_exit(&stmf_state.stmf_lock);
2517                         return (EINVAL);
2518                 }
2519         }
2520 
2521         if ((ret = nvlist_unpack((char *)ppi->ppi_data,
2522             (size_t)ppi->ppi_data_size, &nv, KM_NOSLEEP)) != 0) {
2523                 mutex_exit(&stmf_state.stmf_lock);
2524                 return (ret);
2525         }
2526 
2527         /* Free any existing lists and add this one to the ppd */
2528         nvlist_free(ppd->ppd_nv);
2529         ppd->ppd_nv = nv;
2530 
2531         /* set the token for writes */
2532         ppd->ppd_token++;
2533         /* return token to caller */
2534         if (ppi_token) {
2535                 *ppi_token = ppd->ppd_token;
2536         }
2537 
2538         /* If there is a provider registered, do the notifications */
2539         if (ppd->ppd_provider) {
2540                 uint32_t cb_flags = 0;
2541 
2542                 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2543                         cb_flags |= STMF_PCB_STMF_ONLINING;
2544                 if (ppi->ppi_lu_provider) {
2545                         ilp = (stmf_i_lu_provider_t *)ppd->ppd_provider;
2546                         if (ilp->ilp_lp->lp_cb == NULL)
2547                                 goto bail_out;
2548                         ilp->ilp_cb_in_progress = 1;
2549                         mutex_exit(&stmf_state.stmf_lock);
2550                         ilp->ilp_lp->lp_cb(ilp->ilp_lp,
2551                             STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2552                         mutex_enter(&stmf_state.stmf_lock);
2553                         ilp->ilp_cb_in_progress = 0;
2554                 } else {
2555                         ipp = (stmf_i_port_provider_t *)ppd->ppd_provider;
2556                         if (ipp->ipp_pp->pp_cb == NULL)
2557                                 goto bail_out;
2558                         ipp->ipp_cb_in_progress = 1;
2559                         mutex_exit(&stmf_state.stmf_lock);
2560                         ipp->ipp_pp->pp_cb(ipp->ipp_pp,
2561                             STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2562                         mutex_enter(&stmf_state.stmf_lock);
2563                         ipp->ipp_cb_in_progress = 0;
2564                 }
2565         }
2566 
2567 bail_out:
2568         mutex_exit(&stmf_state.stmf_lock);
2569 
2570         return (0);
2571 }
2572 
2573 void
2574 stmf_delete_ppd(stmf_pp_data_t *ppd)
2575 {
2576         stmf_pp_data_t **pppd;
2577 
2578         ASSERT(mutex_owned(&stmf_state.stmf_lock));
2579         if (ppd->ppd_provider) {
2580                 if (ppd->ppd_lu_provider) {
2581                         ((stmf_i_lu_provider_t *)
2582                             ppd->ppd_provider)->ilp_ppd = NULL;
2583                 } else {
2584                         ((stmf_i_port_provider_t *)
2585                             ppd->ppd_provider)->ipp_ppd = NULL;
2586                 }
2587                 ppd->ppd_provider = NULL;
2588         }
2589 
2590         for (pppd = &stmf_state.stmf_ppdlist; *pppd != NULL;
2591             pppd = &((*pppd)->ppd_next)) {
2592                 if (*pppd == ppd)
2593                         break;
2594         }
2595 
2596         if (*pppd == NULL)
2597                 return;
2598 
2599         *pppd = ppd->ppd_next;
2600         nvlist_free(ppd->ppd_nv);
2601 
2602         kmem_free(ppd, ppd->ppd_alloc_size);
2603 }
2604 
2605 int
2606 stmf_delete_ppd_ioctl(stmf_ppioctl_data_t *ppi)
2607 {
2608         stmf_pp_data_t *ppd;
2609         int ret = ENOENT;
2610 
2611         if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2612                 return (EINVAL);
2613         }
2614 
2615         mutex_enter(&stmf_state.stmf_lock);
2616 
2617         for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2618                 if (ppi->ppi_lu_provider) {
2619                         if (!ppd->ppd_lu_provider)
2620                                 continue;
2621                 } else if (ppi->ppi_port_provider) {
2622                         if (!ppd->ppd_port_provider)
2623                                 continue;
2624                 }
2625                 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2626                         break;
2627         }
2628 
2629         if (ppd) {
2630                 ret = 0;
2631                 stmf_delete_ppd(ppd);
2632         }
2633         mutex_exit(&stmf_state.stmf_lock);
2634 
2635         return (ret);
2636 }
2637 
2638 int
2639 stmf_get_ppd_ioctl(stmf_ppioctl_data_t *ppi, stmf_ppioctl_data_t *ppi_out,
2640     uint32_t *err_ret)
2641 {
2642         stmf_pp_data_t *ppd;
2643         size_t req_size;
2644         int ret = ENOENT;
2645         char *bufp = (char *)ppi_out->ppi_data;
2646 
2647         if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2648                 return (EINVAL);
2649         }
2650 
2651         mutex_enter(&stmf_state.stmf_lock);
2652 
2653         for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2654                 if (ppi->ppi_lu_provider) {
2655                         if (!ppd->ppd_lu_provider)
2656                                 continue;
2657                 } else if (ppi->ppi_port_provider) {
2658                         if (!ppd->ppd_port_provider)
2659                                 continue;
2660                 }
2661                 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2662                         break;
2663         }
2664 
2665         if (ppd && ppd->ppd_nv) {
2666                 ppi_out->ppi_token = ppd->ppd_token;
2667                 if ((ret = nvlist_size(ppd->ppd_nv, &req_size,
2668                     NV_ENCODE_XDR)) != 0) {
2669                         goto done;
2670                 }
2671                 ppi_out->ppi_data_size = req_size;
2672                 if (req_size > ppi->ppi_data_size) {
2673                         *err_ret = STMF_IOCERR_INSUFFICIENT_BUF;
2674                         ret = EINVAL;
2675                         goto done;
2676                 }
2677 
2678                 if ((ret = nvlist_pack(ppd->ppd_nv, &bufp, &req_size,
2679                     NV_ENCODE_XDR, 0)) != 0) {
2680                         goto done;
2681                 }
2682                 ret = 0;
2683         }
2684 
2685 done:
2686         mutex_exit(&stmf_state.stmf_lock);
2687 
2688         return (ret);
2689 }
2690 
2691 void
2692 stmf_delete_all_ppds()
2693 {
2694         stmf_pp_data_t *ppd, *nppd;
2695 
2696         ASSERT(mutex_owned(&stmf_state.stmf_lock));
2697         for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = nppd) {
2698                 nppd = ppd->ppd_next;
2699                 stmf_delete_ppd(ppd);
2700         }
2701 }
2702 
2703 /*
2704  * 16 is the max string length of a protocol_ident, increase
2705  * the size if needed.
2706  */
2707 #define STMF_KSTAT_LU_SZ        (STMF_GUID_INPUT + 1 + 256)
2708 #define STMF_KSTAT_TGT_SZ       (256 * 2 + 16)
2709 
2710 /*
2711  * This array matches the Protocol Identifier in stmf_ioctl.h
2712  */
2713 #define MAX_PROTO_STR_LEN       32
2714 
2715 char *protocol_ident[PROTOCOL_ANY] = {
2716         "Fibre Channel",
2717         "Parallel SCSI",
2718         "SSA",
2719         "IEEE_1394",
2720         "SRP",
2721         "iSCSI",
2722         "SAS",
2723         "ADT",
2724         "ATAPI",
2725         "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN"
2726 };
2727 
2728 /*
2729  * Update the lun wait/run queue count
2730  */
2731 static void
2732 stmf_update_kstat_lu_q(scsi_task_t *task, void func())
2733 {
2734         stmf_i_lu_t             *ilu;
2735         kstat_io_t              *kip;
2736 
2737         if (task->task_lu == dlun0)
2738                 return;
2739         ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
2740         if (ilu != NULL && ilu->ilu_kstat_io != NULL) {
2741                 kip = KSTAT_IO_PTR(ilu->ilu_kstat_io);
2742                 if (kip != NULL) {
2743                         func(kip);
2744                 }
2745         }
2746 }
2747 
2748 /*
2749  * Update the target(lport) wait/run queue count
2750  */
2751 static void
2752 stmf_update_kstat_lport_q(scsi_task_t *task, void func())
2753 {
2754         stmf_i_local_port_t     *ilp;
2755         kstat_io_t              *kip;
2756 
2757         ilp = (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
2758         if (ilp != NULL && ilp->ilport_kstat_io != NULL) {
2759                 kip = KSTAT_IO_PTR(ilp->ilport_kstat_io);
2760                 if (kip != NULL) {
2761                         mutex_enter(ilp->ilport_kstat_io->ks_lock);
2762                         func(kip);
2763                         mutex_exit(ilp->ilport_kstat_io->ks_lock);
2764                 }
2765         }
2766 }
2767 
2768 static void
2769 stmf_update_kstat_lport_io(scsi_task_t *task, stmf_data_buf_t *dbuf)
2770 {
2771         stmf_i_local_port_t     *ilp;
2772         kstat_io_t              *kip;
2773 
2774         ilp = (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
2775         if (ilp != NULL && ilp->ilport_kstat_io != NULL) {
2776                 kip = KSTAT_IO_PTR(ilp->ilport_kstat_io);
2777                 if (kip != NULL) {
2778                         mutex_enter(ilp->ilport_kstat_io->ks_lock);
2779                         STMF_UPDATE_KSTAT_IO(kip, dbuf);
2780                         mutex_exit(ilp->ilport_kstat_io->ks_lock);
2781                 }
2782         }
2783 }
2784 
2785 static void
2786 stmf_update_kstat_lu_io(scsi_task_t *task, stmf_data_buf_t *dbuf)
2787 {
2788         stmf_i_lu_t             *ilu;
2789         kstat_io_t              *kip;
2790 
2791         ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
2792         if (ilu != NULL && ilu->ilu_kstat_io != NULL) {
2793                 kip = KSTAT_IO_PTR(ilu->ilu_kstat_io);
2794                 if (kip != NULL) {
2795                         mutex_enter(ilu->ilu_kstat_io->ks_lock);
2796                         STMF_UPDATE_KSTAT_IO(kip, dbuf);
2797                         mutex_exit(ilu->ilu_kstat_io->ks_lock);
2798                 }
2799         }
2800 }
2801 
2802 static void
2803 stmf_create_kstat_lu(stmf_i_lu_t *ilu)
2804 {
2805         char                            ks_nm[KSTAT_STRLEN];
2806         stmf_kstat_lu_info_t            *ks_lu;
2807 
2808         /* create kstat lun info */
2809         ks_lu = (stmf_kstat_lu_info_t *)kmem_zalloc(STMF_KSTAT_LU_SZ,
2810             KM_NOSLEEP);
2811         if (ks_lu == NULL) {
2812                 cmn_err(CE_WARN, "STMF: kmem_zalloc failed");
2813                 return;
2814         }
2815 
2816         bzero(ks_nm, sizeof (ks_nm));
2817         (void) sprintf(ks_nm, "stmf_lu_%"PRIxPTR"", (uintptr_t)ilu);
2818         if ((ilu->ilu_kstat_info = kstat_create(STMF_MODULE_NAME, 0,
2819             ks_nm, "misc", KSTAT_TYPE_NAMED,
2820             sizeof (stmf_kstat_lu_info_t) / sizeof (kstat_named_t),
2821             KSTAT_FLAG_VIRTUAL)) == NULL) {
2822                 kmem_free(ks_lu, STMF_KSTAT_LU_SZ);
2823                 cmn_err(CE_WARN, "STMF: kstat_create lu failed");
2824                 return;
2825         }
2826 
2827         ilu->ilu_kstat_info->ks_data_size = STMF_KSTAT_LU_SZ;
2828         ilu->ilu_kstat_info->ks_data = ks_lu;
2829 
2830         kstat_named_init(&ks_lu->i_lun_guid, "lun-guid",
2831             KSTAT_DATA_STRING);
2832         kstat_named_init(&ks_lu->i_lun_alias, "lun-alias",
2833             KSTAT_DATA_STRING);
2834 
2835         /* convert guid to hex string */
2836         int             i;
2837         uint8_t         *p = ilu->ilu_lu->lu_id->ident;
2838         bzero(ilu->ilu_ascii_hex_guid, sizeof (ilu->ilu_ascii_hex_guid));
2839         for (i = 0; i < STMF_GUID_INPUT / 2; i++) {
2840                 (void) sprintf(&ilu->ilu_ascii_hex_guid[i * 2], "%02x", p[i]);
2841         }
2842         kstat_named_setstr(&ks_lu->i_lun_guid,
2843             (const char *)ilu->ilu_ascii_hex_guid);
2844         kstat_named_setstr(&ks_lu->i_lun_alias,
2845             (const char *)ilu->ilu_lu->lu_alias);
2846         kstat_install(ilu->ilu_kstat_info);
2847 
2848         /* create kstat lun io */
2849         bzero(ks_nm, sizeof (ks_nm));
2850         (void) sprintf(ks_nm, "stmf_lu_io_%"PRIxPTR"", (uintptr_t)ilu);
2851         if ((ilu->ilu_kstat_io = kstat_create(STMF_MODULE_NAME, 0,
2852             ks_nm, "io", KSTAT_TYPE_IO, 1, 0)) == NULL) {
2853                 cmn_err(CE_WARN, "STMF: kstat_create lu_io failed");
2854                 return;
2855         }
2856         mutex_init(&ilu->ilu_kstat_lock, NULL, MUTEX_DRIVER, 0);
2857         ilu->ilu_kstat_io->ks_lock = &ilu->ilu_kstat_lock;
2858         kstat_install(ilu->ilu_kstat_io);
2859 }
2860 
2861 static void
2862 stmf_create_kstat_lport(stmf_i_local_port_t *ilport)
2863 {
2864         char                            ks_nm[KSTAT_STRLEN];
2865         stmf_kstat_tgt_info_t           *ks_tgt;
2866         int                             id, len;
2867 
2868         /* create kstat lport info */
2869         ks_tgt = (stmf_kstat_tgt_info_t *)kmem_zalloc(STMF_KSTAT_TGT_SZ,
2870             KM_NOSLEEP);
2871         if (ks_tgt == NULL) {
2872                 cmn_err(CE_WARN, "STMF: kmem_zalloc failed");
2873                 return;
2874         }
2875 
2876         bzero(ks_nm, sizeof (ks_nm));
2877         (void) sprintf(ks_nm, "stmf_tgt_%"PRIxPTR"", (uintptr_t)ilport);
2878         if ((ilport->ilport_kstat_info = kstat_create(STMF_MODULE_NAME,
2879             0, ks_nm, "misc", KSTAT_TYPE_NAMED,
2880             sizeof (stmf_kstat_tgt_info_t) / sizeof (kstat_named_t),
2881             KSTAT_FLAG_VIRTUAL)) == NULL) {
2882                 kmem_free(ks_tgt, STMF_KSTAT_TGT_SZ);
2883                 cmn_err(CE_WARN, "STMF: kstat_create target failed");
2884                 return;
2885         }
2886 
2887         ilport->ilport_kstat_info->ks_data_size = STMF_KSTAT_TGT_SZ;
2888         ilport->ilport_kstat_info->ks_data = ks_tgt;
2889 
2890         kstat_named_init(&ks_tgt->i_tgt_name, "target-name",
2891             KSTAT_DATA_STRING);
2892         kstat_named_init(&ks_tgt->i_tgt_alias, "target-alias",
2893             KSTAT_DATA_STRING);
2894         kstat_named_init(&ks_tgt->i_protocol, "protocol",
2895             KSTAT_DATA_STRING);
2896 
2897         /* ident might not be null terminated */
2898         len = ilport->ilport_lport->lport_id->ident_length;
2899         bcopy(ilport->ilport_lport->lport_id->ident,
2900             ilport->ilport_kstat_tgt_name, len);
2901         ilport->ilport_kstat_tgt_name[len + 1] = NULL;
2902         kstat_named_setstr(&ks_tgt->i_tgt_name,
2903             (const char *)ilport->ilport_kstat_tgt_name);
2904         kstat_named_setstr(&ks_tgt->i_tgt_alias,
2905             (const char *)ilport->ilport_lport->lport_alias);
2906         /* protocol */
2907         if ((id = ilport->ilport_lport->lport_id->protocol_id) > PROTOCOL_ANY) {
2908                 cmn_err(CE_WARN, "STMF: protocol_id out of bound");
2909                 id = PROTOCOL_ANY;
2910         }
2911         kstat_named_setstr(&ks_tgt->i_protocol, protocol_ident[id]);
2912         kstat_install(ilport->ilport_kstat_info);
2913 
2914         /* create kstat lport io */
2915         bzero(ks_nm, sizeof (ks_nm));
2916         (void) sprintf(ks_nm, "stmf_tgt_io_%"PRIxPTR"", (uintptr_t)ilport);
2917         if ((ilport->ilport_kstat_io = kstat_create(STMF_MODULE_NAME, 0,
2918             ks_nm, "io", KSTAT_TYPE_IO, 1, 0)) == NULL) {
2919                 cmn_err(CE_WARN, "STMF: kstat_create target_io failed");
2920                 return;
2921         }
2922         mutex_init(&ilport->ilport_kstat_lock, NULL, MUTEX_DRIVER, 0);
2923         ilport->ilport_kstat_io->ks_lock = &ilport->ilport_kstat_lock;
2924         kstat_install(ilport->ilport_kstat_io);
2925 }
2926 
2927 /*
2928  * set the asymmetric access state for a logical unit
2929  * caller is responsible for establishing SCSI unit attention on
2930  * state change
2931  */
2932 stmf_status_t
2933 stmf_set_lu_access(stmf_lu_t *lu, uint8_t access_state)
2934 {
2935         stmf_i_lu_t *ilu;
2936         uint8_t *p1, *p2;
2937 
2938         if ((access_state != STMF_LU_STANDBY) &&
2939             (access_state != STMF_LU_ACTIVE)) {
2940                 return (STMF_INVALID_ARG);
2941         }
2942 
2943         p1 = &lu->lu_id->ident[0];
2944         mutex_enter(&stmf_state.stmf_lock);
2945         if (stmf_state.stmf_inventory_locked) {
2946                 mutex_exit(&stmf_state.stmf_lock);
2947                 return (STMF_BUSY);
2948         }
2949 
2950         for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
2951                 p2 = &ilu->ilu_lu->lu_id->ident[0];
2952                 if (bcmp(p1, p2, 16) == 0) {
2953                         break;
2954                 }
2955         }
2956 
2957         if (!ilu) {
2958                 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
2959         } else {
2960                 /*
2961                  * We're changing access state on an existing logical unit
2962                  * Send the proxy registration message for this logical unit
2963                  * if we're in alua mode.
2964                  * If the requested state is STMF_LU_ACTIVE, we want to register
2965                  * this logical unit.
2966                  * If the requested state is STMF_LU_STANDBY, we're going to
2967                  * abort all tasks for this logical unit.
2968                  */
2969                 if (stmf_state.stmf_alua_state == 1 &&
2970                     access_state == STMF_LU_ACTIVE) {
2971                         stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
2972                         stmf_ic_msg_t *ic_reg_lun;
2973                         if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
2974                             lu->lu_lp->lp_alua_support) {
2975                                 ilu->ilu_alua = 1;
2976                                 /* allocate the register message */
2977                                 ic_reg_lun = ic_lun_active_msg_alloc(p1,
2978                                     lu->lu_lp->lp_name,
2979                                     lu->lu_proxy_reg_arg_len,
2980                                     (uint8_t *)lu->lu_proxy_reg_arg,
2981                                     stmf_proxy_msg_id);
2982                                 /* send the message */
2983                                 if (ic_reg_lun) {
2984                                         ic_ret = ic_tx_msg(ic_reg_lun);
2985                                         if (ic_ret == STMF_IC_MSG_SUCCESS) {
2986                                                 stmf_proxy_msg_id++;
2987                                         }
2988                                 }
2989                         }
2990                 } else if (stmf_state.stmf_alua_state == 1 &&
2991                     access_state == STMF_LU_STANDBY) {
2992                         /* abort all tasks for this lu */
2993                         stmf_task_lu_killall(lu, NULL, STMF_ABORTED);
2994                 }
2995         }
2996 
2997         ilu->ilu_access = access_state;
2998 
2999         mutex_exit(&stmf_state.stmf_lock);
3000         return (STMF_SUCCESS);
3001 }
3002 
3003 
3004 stmf_status_t
3005 stmf_register_lu(stmf_lu_t *lu)
3006 {
3007         stmf_i_lu_t *ilu;
3008         uint8_t *p1, *p2;
3009         stmf_state_change_info_t ssci;
3010         stmf_id_data_t *luid;
3011 
3012         if ((lu->lu_id->ident_type != ID_TYPE_NAA) ||
3013             (lu->lu_id->ident_length != 16) ||
3014             ((lu->lu_id->ident[0] & 0xf0) != 0x60)) {
3015                 return (STMF_INVALID_ARG);
3016         }
3017         p1 = &lu->lu_id->ident[0];
3018         mutex_enter(&stmf_state.stmf_lock);
3019         if (stmf_state.stmf_inventory_locked) {
3020                 mutex_exit(&stmf_state.stmf_lock);
3021                 return (STMF_BUSY);
3022         }
3023 
3024         for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
3025                 p2 = &ilu->ilu_lu->lu_id->ident[0];
3026                 if (bcmp(p1, p2, 16) == 0) {
3027                         mutex_exit(&stmf_state.stmf_lock);
3028                         return (STMF_ALREADY);
3029                 }
3030         }
3031 
3032         ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3033         luid = stmf_lookup_id(&stmf_state.stmf_luid_list,
3034             lu->lu_id->ident_length, lu->lu_id->ident);
3035         if (luid) {
3036                 luid->id_pt_to_object = (void *)ilu;
3037                 ilu->ilu_luid = luid;
3038         }
3039         ilu->ilu_alias = NULL;
3040 
3041         ilu->ilu_next = stmf_state.stmf_ilulist;
3042         ilu->ilu_prev = NULL;
3043         if (ilu->ilu_next)
3044                 ilu->ilu_next->ilu_prev = ilu;
3045         stmf_state.stmf_ilulist = ilu;
3046         stmf_state.stmf_nlus++;
3047         if (lu->lu_lp) {
3048                 ((stmf_i_lu_provider_t *)
3049                     (lu->lu_lp->lp_stmf_private))->ilp_nlus++;
3050         }
3051         ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
3052         STMF_EVENT_ALLOC_HANDLE(ilu->ilu_event_hdl);
3053         cv_init(&ilu->ilu_offline_pending_cv, NULL, CV_DRIVER, NULL);
3054         stmf_create_kstat_lu(ilu);
3055         /*
3056          * register with proxy module if available and logical unit
3057          * is in active state
3058          */
3059         if (stmf_state.stmf_alua_state == 1 &&
3060             ilu->ilu_access == STMF_LU_ACTIVE) {
3061                 stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
3062                 stmf_ic_msg_t *ic_reg_lun;
3063                 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
3064                     lu->lu_lp->lp_alua_support) {
3065                         ilu->ilu_alua = 1;
3066                         /* allocate the register message */
3067                         ic_reg_lun = ic_reg_lun_msg_alloc(p1,
3068                             lu->lu_lp->lp_name, lu->lu_proxy_reg_arg_len,
3069                             (uint8_t *)lu->lu_proxy_reg_arg, stmf_proxy_msg_id);
3070                         /* send the message */
3071                         if (ic_reg_lun) {
3072                                 ic_ret = ic_tx_msg(ic_reg_lun);
3073                                 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3074                                         stmf_proxy_msg_id++;
3075                                 }
3076                         }
3077                 }
3078         }
3079         mutex_exit(&stmf_state.stmf_lock);
3080 
3081         /*  check the default state for lu */
3082         if (stmf_state.stmf_default_lu_state == STMF_STATE_OFFLINE) {
3083                 ilu->ilu_prev_state = STMF_STATE_OFFLINE;
3084         } else {
3085                 ilu->ilu_prev_state = STMF_STATE_ONLINE;
3086                 if (stmf_state.stmf_service_running) {
3087                         ssci.st_rflags = 0;
3088                         ssci.st_additional_info = NULL;
3089                         (void) stmf_ctl(STMF_CMD_LU_ONLINE, lu, &ssci);
3090                 }
3091         }
3092 
3093         /* XXX: Generate event */
3094         return (STMF_SUCCESS);
3095 }
3096 
3097 stmf_status_t
3098 stmf_deregister_lu(stmf_lu_t *lu)
3099 {
3100         stmf_i_lu_t *ilu;
3101 
3102         mutex_enter(&stmf_state.stmf_lock);
3103         if (stmf_state.stmf_inventory_locked) {
3104                 mutex_exit(&stmf_state.stmf_lock);
3105                 return (STMF_BUSY);
3106         }
3107         ilu = stmf_lookup_lu(lu);
3108         if (ilu == NULL) {
3109                 mutex_exit(&stmf_state.stmf_lock);
3110                 return (STMF_INVALID_ARG);
3111         }
3112         if (ilu->ilu_state == STMF_STATE_OFFLINE) {
3113                 ASSERT(ilu->ilu_ntasks == ilu->ilu_ntasks_free);
3114                 while (ilu->ilu_flags & ILU_STALL_DEREGISTER) {
3115                         cv_wait(&stmf_state.stmf_cv, &stmf_state.stmf_lock);
3116                 }
3117                 if (ilu->ilu_ntasks) {
3118                         stmf_i_scsi_task_t *itask, *nitask;
3119 
3120                         nitask = ilu->ilu_tasks;
3121                         do {
3122                                 itask = nitask;
3123                                 nitask = itask->itask_lu_next;
3124                                 lu->lu_task_free(itask->itask_task);
3125                                 stmf_free(itask->itask_task);
3126                         } while (nitask != NULL);
3127 
3128                         ilu->ilu_tasks = ilu->ilu_free_tasks = NULL;
3129                         ilu->ilu_ntasks = ilu->ilu_ntasks_free = 0;
3130                 }
3131                 /* de-register with proxy if available */
3132                 if (ilu->ilu_access == STMF_LU_ACTIVE &&
3133                     stmf_state.stmf_alua_state == 1) {
3134                         /* de-register with proxy module */
3135                         stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
3136                         stmf_ic_msg_t *ic_dereg_lun;
3137                         if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
3138                             lu->lu_lp->lp_alua_support) {
3139                                 ilu->ilu_alua = 1;
3140                                 /* allocate the de-register message */
3141                                 ic_dereg_lun = ic_dereg_lun_msg_alloc(
3142                                     lu->lu_id->ident, lu->lu_lp->lp_name, 0,
3143                                     NULL, stmf_proxy_msg_id);
3144                                 /* send the message */
3145                                 if (ic_dereg_lun) {
3146                                         ic_ret = ic_tx_msg(ic_dereg_lun);
3147                                         if (ic_ret == STMF_IC_MSG_SUCCESS) {
3148                                                 stmf_proxy_msg_id++;
3149                                         }
3150                                 }
3151                         }
3152                 }
3153 
3154                 if (ilu->ilu_next)
3155                         ilu->ilu_next->ilu_prev = ilu->ilu_prev;
3156                 if (ilu->ilu_prev)
3157                         ilu->ilu_prev->ilu_next = ilu->ilu_next;
3158                 else
3159                         stmf_state.stmf_ilulist = ilu->ilu_next;
3160                 stmf_state.stmf_nlus--;
3161 
3162                 if (ilu == stmf_state.stmf_svc_ilu_draining) {
3163                         stmf_state.stmf_svc_ilu_draining = ilu->ilu_next;
3164                 }
3165                 if (ilu == stmf_state.stmf_svc_ilu_timing) {
3166                         stmf_state.stmf_svc_ilu_timing = ilu->ilu_next;
3167                 }
3168                 if (lu->lu_lp) {
3169                         ((stmf_i_lu_provider_t *)
3170                             (lu->lu_lp->lp_stmf_private))->ilp_nlus--;
3171                 }
3172                 if (ilu->ilu_luid) {
3173                         ((stmf_id_data_t *)ilu->ilu_luid)->id_pt_to_object =
3174                             NULL;
3175                         ilu->ilu_luid = NULL;
3176                 }
3177                 STMF_EVENT_FREE_HANDLE(ilu->ilu_event_hdl);
3178         } else {
3179                 mutex_exit(&stmf_state.stmf_lock);
3180                 return (STMF_BUSY);
3181         }
3182         if (ilu->ilu_kstat_info) {
3183                 kmem_free(ilu->ilu_kstat_info->ks_data,
3184                     ilu->ilu_kstat_info->ks_data_size);
3185                 kstat_delete(ilu->ilu_kstat_info);
3186         }
3187         if (ilu->ilu_kstat_io) {
3188                 kstat_delete(ilu->ilu_kstat_io);
3189                 mutex_destroy(&ilu->ilu_kstat_lock);
3190         }
3191         cv_destroy(&ilu->ilu_offline_pending_cv);
3192         mutex_exit(&stmf_state.stmf_lock);
3193         return (STMF_SUCCESS);
3194 }
3195 
3196 void
3197 stmf_set_port_standby(stmf_local_port_t *lport, uint16_t rtpid)
3198 {
3199         stmf_i_local_port_t *ilport =
3200             (stmf_i_local_port_t *)lport->lport_stmf_private;
3201         ilport->ilport_rtpid = rtpid;
3202         ilport->ilport_standby = 1;
3203 }
3204 
3205 void
3206 stmf_set_port_alua(stmf_local_port_t *lport)
3207 {
3208         stmf_i_local_port_t *ilport =
3209             (stmf_i_local_port_t *)lport->lport_stmf_private;
3210         ilport->ilport_alua = 1;
3211 }
3212 
3213 stmf_status_t
3214 stmf_register_local_port(stmf_local_port_t *lport)
3215 {
3216         stmf_i_local_port_t *ilport;
3217         stmf_state_change_info_t ssci;
3218         int start_workers = 0;
3219 
3220         mutex_enter(&stmf_state.stmf_lock);
3221         if (stmf_state.stmf_inventory_locked) {
3222                 mutex_exit(&stmf_state.stmf_lock);
3223                 return (STMF_BUSY);
3224         }
3225         ilport = (stmf_i_local_port_t *)lport->lport_stmf_private;
3226         rw_init(&ilport->ilport_lock, NULL, RW_DRIVER, NULL);
3227 
3228         ilport->ilport_instance =
3229             id_alloc_nosleep(stmf_state.stmf_ilport_inst_space);
3230         if (ilport->ilport_instance == -1) {
3231                 mutex_exit(&stmf_state.stmf_lock);
3232                 return (STMF_FAILURE);
3233         }
3234         ilport->ilport_next = stmf_state.stmf_ilportlist;
3235         ilport->ilport_prev = NULL;
3236         if (ilport->ilport_next)
3237                 ilport->ilport_next->ilport_prev = ilport;
3238         stmf_state.stmf_ilportlist = ilport;
3239         stmf_state.stmf_nlports++;
3240         if (lport->lport_pp) {
3241                 ((stmf_i_port_provider_t *)
3242                     (lport->lport_pp->pp_stmf_private))->ipp_npps++;
3243         }
3244         ilport->ilport_tg =
3245             stmf_lookup_group_for_target(lport->lport_id->ident,
3246             lport->lport_id->ident_length);
3247 
3248         /*
3249          * rtpid will/must be set if this is a standby port
3250          * only register ports that are not standby (proxy) ports
3251          * and ports that are alua participants (ilport_alua == 1)
3252          */
3253         if (ilport->ilport_standby == 0) {
3254                 ilport->ilport_rtpid = atomic_inc_16_nv(&stmf_rtpid_counter);
3255         }
3256 
3257         if (stmf_state.stmf_alua_state == 1 &&
3258             ilport->ilport_standby == 0 &&
3259             ilport->ilport_alua == 1) {
3260                 stmf_ic_msg_t *ic_reg_port;
3261                 stmf_ic_msg_status_t ic_ret;
3262                 stmf_local_port_t *lport;
3263                 lport = ilport->ilport_lport;
3264                 ic_reg_port = ic_reg_port_msg_alloc(
3265                     lport->lport_id, ilport->ilport_rtpid,
3266                     0, NULL, stmf_proxy_msg_id);
3267                 if (ic_reg_port) {
3268                         ic_ret = ic_tx_msg(ic_reg_port);
3269                         if (ic_ret == STMF_IC_MSG_SUCCESS) {
3270                                 ilport->ilport_reg_msgid = stmf_proxy_msg_id++;
3271                         } else {
3272                                 cmn_err(CE_WARN, "error on port registration "
3273                                 "port - %s", ilport->ilport_kstat_tgt_name);
3274                         }
3275                 }
3276         }
3277         STMF_EVENT_ALLOC_HANDLE(ilport->ilport_event_hdl);
3278         stmf_create_kstat_lport(ilport);
3279         if (stmf_workers_state == STMF_WORKERS_DISABLED) {
3280                 stmf_workers_state = STMF_WORKERS_ENABLING;
3281                 start_workers = 1;
3282         }
3283         mutex_exit(&stmf_state.stmf_lock);
3284 
3285         if (start_workers)
3286                 stmf_worker_init();
3287 
3288         /*  the default state of LPORT */
3289 
3290         if (stmf_state.stmf_default_lport_state == STMF_STATE_OFFLINE) {
3291                 ilport->ilport_prev_state = STMF_STATE_OFFLINE;
3292         } else {
3293                 ilport->ilport_prev_state = STMF_STATE_ONLINE;
3294                 if (stmf_state.stmf_service_running) {
3295                         ssci.st_rflags = 0;
3296                         ssci.st_additional_info = NULL;
3297                         (void) stmf_ctl(STMF_CMD_LPORT_ONLINE, lport, &ssci);
3298                 }
3299         }
3300 
3301         /* XXX: Generate event */
3302         return (STMF_SUCCESS);
3303 }
3304 
3305 stmf_status_t
3306 stmf_deregister_local_port(stmf_local_port_t *lport)
3307 {
3308         stmf_i_local_port_t *ilport;
3309 
3310         mutex_enter(&stmf_state.stmf_lock);
3311         if (stmf_state.stmf_inventory_locked) {
3312                 mutex_exit(&stmf_state.stmf_lock);
3313                 return (STMF_BUSY);
3314         }
3315 
3316         /* dequeue all object requests from active queue */
3317         stmf_svc_kill_obj_requests(lport);
3318 
3319         ilport = (stmf_i_local_port_t *)lport->lport_stmf_private;
3320 
3321         /*
3322          * deregister ports that are not standby (proxy)
3323          */
3324         if (stmf_state.stmf_alua_state == 1 &&
3325             ilport->ilport_standby == 0 &&
3326             ilport->ilport_alua == 1) {
3327                 stmf_ic_msg_t *ic_dereg_port;
3328                 stmf_ic_msg_status_t ic_ret;
3329                 ic_dereg_port = ic_dereg_port_msg_alloc(
3330                     lport->lport_id, 0, NULL, stmf_proxy_msg_id);
3331                 if (ic_dereg_port) {
3332                         ic_ret = ic_tx_msg(ic_dereg_port);
3333                         if (ic_ret == STMF_IC_MSG_SUCCESS) {
3334                                 stmf_proxy_msg_id++;
3335                         }
3336                 }
3337         }
3338 
3339         if (ilport->ilport_nsessions == 0) {
3340                 if (ilport->ilport_next)
3341                         ilport->ilport_next->ilport_prev = ilport->ilport_prev;
3342                 if (ilport->ilport_prev)
3343                         ilport->ilport_prev->ilport_next = ilport->ilport_next;
3344                 else
3345                         stmf_state.stmf_ilportlist = ilport->ilport_next;
3346                 id_free(stmf_state.stmf_ilport_inst_space,
3347                     ilport->ilport_instance);
3348                 rw_destroy(&ilport->ilport_lock);
3349                 stmf_state.stmf_nlports--;
3350                 if (lport->lport_pp) {
3351                         ((stmf_i_port_provider_t *)
3352                             (lport->lport_pp->pp_stmf_private))->ipp_npps--;
3353                 }
3354                 ilport->ilport_tg = NULL;
3355                 STMF_EVENT_FREE_HANDLE(ilport->ilport_event_hdl);
3356         } else {
3357                 mutex_exit(&stmf_state.stmf_lock);
3358                 return (STMF_BUSY);
3359         }
3360         if (ilport->ilport_kstat_info) {
3361                 kmem_free(ilport->ilport_kstat_info->ks_data,
3362                     ilport->ilport_kstat_info->ks_data_size);
3363                 kstat_delete(ilport->ilport_kstat_info);
3364         }
3365         if (ilport->ilport_kstat_io) {
3366                 kstat_delete(ilport->ilport_kstat_io);
3367                 mutex_destroy(&ilport->ilport_kstat_lock);
3368         }
3369         mutex_exit(&stmf_state.stmf_lock);
3370         return (STMF_SUCCESS);
3371 }
3372 
3373 /*
3374  * Rport id/instance mappings remain valid until STMF is unloaded
3375  */
3376 static int
3377 stmf_irport_compare(const void *void_irport1, const void *void_irport2)
3378 {
3379         const   stmf_i_remote_port_t    *irport1 = void_irport1;
3380         const   stmf_i_remote_port_t    *irport2 = void_irport2;
3381         int                     result;
3382 
3383         /* Sort by code set then ident */
3384         if (irport1->irport_id->code_set <
3385             irport2->irport_id->code_set) {
3386                 return (-1);
3387         } else if (irport1->irport_id->code_set >
3388             irport2->irport_id->code_set) {
3389                 return (1);
3390         }
3391 
3392         /* Next by ident length */
3393         if (irport1->irport_id->ident_length <
3394             irport2->irport_id->ident_length) {
3395                 return (-1);
3396         } else if (irport1->irport_id->ident_length >
3397             irport2->irport_id->ident_length) {
3398                 return (1);
3399         }
3400 
3401         /* Code set and ident length both match, now compare idents */
3402         result = memcmp(irport1->irport_id->ident,
3403             irport2->irport_id->ident,
3404             irport1->irport_id->ident_length);
3405 
3406         if (result < 0) {
3407                 return (-1);
3408         } else if (result > 0) {
3409                 return (1);
3410         }
3411 
3412         return (0);
3413 }
3414 
3415 static stmf_i_remote_port_t *
3416 stmf_irport_create(scsi_devid_desc_t *rport_devid)
3417 {
3418         int                     alloc_len;
3419         stmf_i_remote_port_t    *irport;
3420 
3421         /*
3422          * Lookup will bump the refcnt if there's an existing rport
3423          * context for this identifier.
3424          */
3425         ASSERT(mutex_owned(&stmf_state.stmf_lock));
3426 
3427         alloc_len = sizeof (*irport) + sizeof (scsi_devid_desc_t) +
3428             rport_devid->ident_length - 1;
3429         irport = kmem_zalloc(alloc_len, KM_NOSLEEP);
3430         if (irport == NULL) {
3431                 return (NULL);
3432         }
3433 
3434         irport->irport_instance =
3435             id_alloc_nosleep(stmf_state.stmf_irport_inst_space);
3436         if (irport->irport_instance == -1) {
3437                 kmem_free(irport, alloc_len);
3438                 return (NULL);
3439         }
3440 
3441         irport->irport_id =
3442             (struct scsi_devid_desc *)(irport + 1); /* Ptr. Arith. */
3443         bcopy(rport_devid, irport->irport_id,
3444             sizeof (scsi_devid_desc_t) + rport_devid->ident_length - 1);
3445         irport->irport_refcnt = 1;
3446         mutex_init(&irport->irport_mutex, NULL, MUTEX_DEFAULT, NULL);
3447 
3448         return (irport);
3449 }
3450 
3451 static void
3452 stmf_irport_destroy(stmf_i_remote_port_t *irport)
3453 {
3454         id_free(stmf_state.stmf_irport_inst_space, irport->irport_instance);
3455         mutex_destroy(&irport->irport_mutex);
3456         kmem_free(irport, sizeof (*irport) + sizeof (scsi_devid_desc_t) +
3457             irport->irport_id->ident_length - 1);
3458 }
3459 
3460 static stmf_i_remote_port_t *
3461 stmf_irport_register(scsi_devid_desc_t *rport_devid)
3462 {
3463         stmf_i_remote_port_t    *irport;
3464 
3465         mutex_enter(&stmf_state.stmf_lock);
3466 
3467         /*
3468          * Lookup will bump the refcnt if there's an existing rport
3469          * context for this identifier.
3470          */
3471         if ((irport = stmf_irport_lookup_locked(rport_devid)) != NULL) {
3472                 mutex_exit(&stmf_state.stmf_lock);
3473                 return (irport);
3474         }
3475 
3476         irport = stmf_irport_create(rport_devid);
3477         if (irport == NULL) {
3478                 mutex_exit(&stmf_state.stmf_lock);
3479                 return (NULL);
3480         }
3481 
3482         avl_add(&stmf_state.stmf_irportlist, irport);
3483         mutex_exit(&stmf_state.stmf_lock);
3484 
3485         return (irport);
3486 }
3487 
3488 static stmf_i_remote_port_t *
3489 stmf_irport_lookup_locked(scsi_devid_desc_t *rport_devid)
3490 {
3491         stmf_i_remote_port_t    *irport;
3492         stmf_i_remote_port_t    tmp_irport;
3493 
3494         ASSERT(mutex_owned(&stmf_state.stmf_lock));
3495         tmp_irport.irport_id = rport_devid;
3496         irport = avl_find(&stmf_state.stmf_irportlist, &tmp_irport, NULL);
3497         if (irport != NULL) {
3498                 mutex_enter(&irport->irport_mutex);
3499                 irport->irport_refcnt++;
3500                 mutex_exit(&irport->irport_mutex);
3501         }
3502 
3503         return (irport);
3504 }
3505 
3506 static void
3507 stmf_irport_deregister(stmf_i_remote_port_t *irport)
3508 {
3509         /*
3510          * If we were actually going to remove unreferenced remote ports
3511          * we would want to acquire stmf_state.stmf_lock before getting
3512          * the irport mutex.
3513          *
3514          * Instead we're just going to leave it there even if unreferenced.
3515          */
3516         mutex_enter(&irport->irport_mutex);
3517         irport->irport_refcnt--;
3518         mutex_exit(&irport->irport_mutex);
3519 }
3520 
3521 /*
3522  * Port provider has to make sure that register/deregister session and
3523  * port are serialized calls.
3524  */
3525 stmf_status_t
3526 stmf_register_scsi_session(stmf_local_port_t *lport, stmf_scsi_session_t *ss)
3527 {
3528         stmf_i_scsi_session_t *iss;
3529         stmf_i_local_port_t *ilport = (stmf_i_local_port_t *)
3530             lport->lport_stmf_private;
3531         uint8_t         lun[8];
3532 
3533         /*
3534          * Port state has to be online to register a scsi session. It is
3535          * possible that we started an offline operation and a new SCSI
3536          * session started at the same time (in that case also we are going
3537          * to fail the registeration). But any other state is simply
3538          * a bad port provider implementation.
3539          */
3540         if (ilport->ilport_state != STMF_STATE_ONLINE) {
3541                 if (ilport->ilport_state != STMF_STATE_OFFLINING) {
3542                         stmf_trace(lport->lport_alias, "Port is trying to "
3543                             "register a session while the state is neither "
3544                             "online nor offlining");
3545                 }
3546                 return (STMF_FAILURE);
3547         }
3548         bzero(lun, 8);
3549         iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3550         if ((iss->iss_irport = stmf_irport_register(ss->ss_rport_id)) == NULL) {
3551                 stmf_trace(lport->lport_alias, "Could not register "
3552                     "remote port during session registration");
3553                 return (STMF_FAILURE);
3554         }
3555 
3556         iss->iss_flags |= ISS_BEING_CREATED;
3557 
3558         if (ss->ss_rport == NULL) {
3559                 iss->iss_flags |= ISS_NULL_TPTID;
3560                 ss->ss_rport = stmf_scsilib_devid_to_remote_port(
3561                     ss->ss_rport_id);
3562                 if (ss->ss_rport == NULL) {
3563                         iss->iss_flags &= ~(ISS_NULL_TPTID | ISS_BEING_CREATED);
3564                         stmf_trace(lport->lport_alias, "Device id to "
3565                             "remote port conversion failed");
3566                         return (STMF_FAILURE);
3567                 }
3568         } else {
3569                 if (!stmf_scsilib_tptid_validate(ss->ss_rport->rport_tptid,
3570                     ss->ss_rport->rport_tptid_sz, NULL)) {
3571                         iss->iss_flags &= ~ISS_BEING_CREATED;
3572                         stmf_trace(lport->lport_alias, "Remote port "
3573                             "transport id validation failed");
3574                         return (STMF_FAILURE);
3575                 }
3576         }
3577 
3578         /* sessions use the ilport_lock. No separate lock is required */
3579         iss->iss_lockp = &ilport->ilport_lock;
3580 
3581         if (iss->iss_sm != NULL)
3582                 cmn_err(CE_PANIC, "create lun map called with non NULL map");
3583         iss->iss_sm = (stmf_lun_map_t *)kmem_zalloc(sizeof (stmf_lun_map_t),
3584             KM_SLEEP);
3585 
3586         mutex_enter(&stmf_state.stmf_lock);
3587         rw_enter(&ilport->ilport_lock, RW_WRITER);
3588         (void) stmf_session_create_lun_map(ilport, iss);
3589         ilport->ilport_nsessions++;
3590         iss->iss_next = ilport->ilport_ss_list;
3591         ilport->ilport_ss_list = iss;
3592         rw_exit(&ilport->ilport_lock);
3593         mutex_exit(&stmf_state.stmf_lock);
3594 
3595         iss->iss_creation_time = ddi_get_time();
3596         ss->ss_session_id = atomic_inc_64_nv(&stmf_session_counter);
3597         iss->iss_flags &= ~ISS_BEING_CREATED;
3598         /* XXX should we remove ISS_LUN_INVENTORY_CHANGED on new session? */
3599         iss->iss_flags &= ~ISS_LUN_INVENTORY_CHANGED;
3600         DTRACE_PROBE2(session__online, stmf_local_port_t *, lport,
3601             stmf_scsi_session_t *, ss);
3602         return (STMF_SUCCESS);
3603 }
3604 
3605 void
3606 stmf_deregister_scsi_session(stmf_local_port_t *lport, stmf_scsi_session_t *ss)
3607 {
3608         stmf_i_local_port_t *ilport = (stmf_i_local_port_t *)
3609             lport->lport_stmf_private;
3610         stmf_i_scsi_session_t *iss, **ppss;
3611         int found = 0;
3612         stmf_ic_msg_t *ic_session_dereg;
3613         stmf_status_t ic_ret = STMF_FAILURE;
3614 
3615         DTRACE_PROBE2(session__offline, stmf_local_port_t *, lport,
3616             stmf_scsi_session_t *, ss);
3617 
3618         iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3619         if (ss->ss_rport_alias) {
3620                 ss->ss_rport_alias = NULL;
3621         }
3622 
3623 try_dereg_ss_again:
3624         mutex_enter(&stmf_state.stmf_lock);
3625         atomic_and_32(&iss->iss_flags,
3626             ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
3627         if (iss->iss_flags & ISS_EVENT_ACTIVE) {
3628                 mutex_exit(&stmf_state.stmf_lock);
3629                 delay(1);
3630                 goto try_dereg_ss_again;
3631         }
3632 
3633         /* dereg proxy session if not standby port */
3634         if (stmf_state.stmf_alua_state == 1 &&
3635             ilport->ilport_standby == 0 &&
3636             ilport->ilport_alua == 1) {
3637                 ic_session_dereg = ic_session_dereg_msg_alloc(
3638                     ss, stmf_proxy_msg_id);
3639                 if (ic_session_dereg) {
3640                         ic_ret = ic_tx_msg(ic_session_dereg);
3641                         if (ic_ret == STMF_IC_MSG_SUCCESS) {
3642                                 stmf_proxy_msg_id++;
3643                         }
3644                 }
3645         }
3646 
3647         rw_enter(&ilport->ilport_lock, RW_WRITER);
3648         for (ppss = &ilport->ilport_ss_list; *ppss != NULL;
3649             ppss = &((*ppss)->iss_next)) {
3650                 if (iss == (*ppss)) {
3651                         *ppss = (*ppss)->iss_next;
3652                         found = 1;
3653                         break;
3654                 }
3655         }
3656         if (!found) {
3657                 cmn_err(CE_PANIC, "Deregister session called for non existent"
3658                     " session");
3659         }
3660         ilport->ilport_nsessions--;
3661 
3662         stmf_irport_deregister(iss->iss_irport);
3663         (void) stmf_session_destroy_lun_map(ilport, iss);
3664         rw_exit(&ilport->ilport_lock);
3665         mutex_exit(&stmf_state.stmf_lock);
3666 
3667         if (iss->iss_flags & ISS_NULL_TPTID) {
3668                 stmf_remote_port_free(ss->ss_rport);
3669         }
3670 }
3671 
3672 stmf_i_scsi_session_t *
3673 stmf_session_id_to_issptr(uint64_t session_id, int stay_locked)
3674 {
3675         stmf_i_local_port_t *ilport;
3676         stmf_i_scsi_session_t *iss;
3677 
3678         mutex_enter(&stmf_state.stmf_lock);
3679         for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
3680             ilport = ilport->ilport_next) {
3681                 rw_enter(&ilport->ilport_lock, RW_WRITER);
3682                 for (iss = ilport->ilport_ss_list; iss != NULL;
3683                     iss = iss->iss_next) {
3684                         if (iss->iss_ss->ss_session_id == session_id) {
3685                                 if (!stay_locked)
3686                                         rw_exit(&ilport->ilport_lock);
3687                                 mutex_exit(&stmf_state.stmf_lock);
3688                                 return (iss);
3689                         }
3690                 }
3691                 rw_exit(&ilport->ilport_lock);
3692         }
3693         mutex_exit(&stmf_state.stmf_lock);
3694         return (NULL);
3695 }
3696 
3697 void
3698 stmf_release_itl_handle(stmf_lu_t *lu, stmf_itl_data_t *itl)
3699 {
3700         stmf_itl_data_t **itlpp;
3701         stmf_i_lu_t *ilu;
3702 
3703         ASSERT(itl->itl_flags & STMF_ITL_BEING_TERMINATED);
3704 
3705         ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3706         mutex_enter(&ilu->ilu_task_lock);
3707         for (itlpp = &ilu->ilu_itl_list; (*itlpp) != NULL;
3708             itlpp = &(*itlpp)->itl_next) {
3709                 if ((*itlpp) == itl)
3710                         break;
3711         }
3712         ASSERT((*itlpp) != NULL);
3713         *itlpp = itl->itl_next;
3714         mutex_exit(&ilu->ilu_task_lock);
3715         lu->lu_abort(lu, STMF_LU_ITL_HANDLE_REMOVED, itl->itl_handle,
3716             (uint32_t)itl->itl_hdlrm_reason);
3717 
3718         kmem_free(itl, sizeof (*itl));
3719 }
3720 
3721 stmf_status_t
3722 stmf_register_itl_handle(stmf_lu_t *lu, uint8_t *lun,
3723     stmf_scsi_session_t *ss, uint64_t session_id, void *itl_handle)
3724 {
3725         stmf_itl_data_t *itl;
3726         stmf_i_scsi_session_t *iss;
3727         stmf_lun_map_ent_t *lun_map_ent;
3728         stmf_i_lu_t *ilu;
3729         uint16_t n;
3730 
3731         ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3732         if (ss == NULL) {
3733                 iss = stmf_session_id_to_issptr(session_id, 1);
3734                 if (iss == NULL)
3735                         return (STMF_NOT_FOUND);
3736         } else {
3737                 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3738         }
3739 
3740         mutex_enter(&stmf_state.stmf_lock);
3741         rw_enter(iss->iss_lockp, RW_WRITER);
3742         n = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
3743         lun_map_ent = (stmf_lun_map_ent_t *)
3744             stmf_get_ent_from_map(iss->iss_sm, n);
3745         if ((lun_map_ent == NULL) || (lun_map_ent->ent_lu != lu)) {
3746                 rw_exit(iss->iss_lockp);
3747                 mutex_exit(&stmf_state.stmf_lock);
3748                 return (STMF_NOT_FOUND);
3749         }
3750         if (lun_map_ent->ent_itl_datap != NULL) {
3751                 rw_exit(iss->iss_lockp);
3752                 mutex_exit(&stmf_state.stmf_lock);
3753                 return (STMF_ALREADY);
3754         }
3755 
3756         itl = (stmf_itl_data_t *)kmem_zalloc(sizeof (*itl), KM_NOSLEEP);
3757         if (itl == NULL) {
3758                 rw_exit(iss->iss_lockp);
3759                 mutex_exit(&stmf_state.stmf_lock);
3760                 return (STMF_ALLOC_FAILURE);
3761         }
3762 
3763         itl->itl_ilu = ilu;
3764         itl->itl_session = iss;
3765         itl->itl_counter = 1;
3766         itl->itl_lun = n;
3767         itl->itl_handle = itl_handle;
3768 
3769         mutex_enter(&ilu->ilu_task_lock);
3770         itl->itl_next = ilu->ilu_itl_list;
3771         ilu->ilu_itl_list = itl;
3772         mutex_exit(&ilu->ilu_task_lock);
3773         lun_map_ent->ent_itl_datap = itl;
3774         rw_exit(iss->iss_lockp);
3775         mutex_exit(&stmf_state.stmf_lock);
3776 
3777         return (STMF_SUCCESS);
3778 }
3779 
3780 void
3781 stmf_do_itl_dereg(stmf_lu_t *lu, stmf_itl_data_t *itl, uint8_t hdlrm_reason)
3782 {
3783         uint8_t old, new;
3784 
3785         do {
3786                 old = new = itl->itl_flags;
3787                 if (old & STMF_ITL_BEING_TERMINATED)
3788                         return;
3789                 new |= STMF_ITL_BEING_TERMINATED;
3790         } while (atomic_cas_8(&itl->itl_flags, old, new) != old);
3791         itl->itl_hdlrm_reason = hdlrm_reason;
3792 
3793         ASSERT(itl->itl_counter);
3794 
3795         if (atomic_dec_32_nv(&itl->itl_counter))
3796                 return;
3797 
3798         stmf_release_itl_handle(lu, itl);
3799 }
3800 
3801 stmf_status_t
3802 stmf_deregister_all_lu_itl_handles(stmf_lu_t *lu)
3803 {
3804         stmf_i_lu_t *ilu;
3805         stmf_i_local_port_t *ilport;
3806         stmf_i_scsi_session_t *iss;
3807         stmf_lun_map_t *lm;
3808         stmf_lun_map_ent_t *ent;
3809         uint32_t nmaps, nu;
3810         stmf_itl_data_t **itl_list;
3811         int i;
3812 
3813         ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3814 
3815 dereg_itl_start:;
3816         nmaps = ilu->ilu_ref_cnt;
3817         if (nmaps == 0)
3818                 return (STMF_NOT_FOUND);
3819         itl_list = (stmf_itl_data_t **)kmem_zalloc(
3820             nmaps * sizeof (stmf_itl_data_t *), KM_SLEEP);
3821         mutex_enter(&stmf_state.stmf_lock);
3822         if (nmaps != ilu->ilu_ref_cnt) {
3823                 /* Something changed, start all over */
3824                 mutex_exit(&stmf_state.stmf_lock);
3825                 kmem_free(itl_list, nmaps * sizeof (stmf_itl_data_t *));
3826                 goto dereg_itl_start;
3827         }
3828         nu = 0;
3829         for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
3830             ilport = ilport->ilport_next) {
3831                 rw_enter(&ilport->ilport_lock, RW_WRITER);
3832                 for (iss = ilport->ilport_ss_list; iss != NULL;
3833                     iss = iss->iss_next) {
3834                         lm = iss->iss_sm;
3835                         if (!lm)
3836                                 continue;
3837                         for (i = 0; i < lm->lm_nentries; i++) {
3838                                 if (lm->lm_plus[i] == NULL)
3839                                         continue;
3840                                 ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
3841                                 if ((ent->ent_lu == lu) &&
3842                                     (ent->ent_itl_datap)) {
3843                                         itl_list[nu++] = ent->ent_itl_datap;
3844                                         ent->ent_itl_datap = NULL;
3845                                         if (nu == nmaps) {
3846                                                 rw_exit(&ilport->ilport_lock);
3847                                                 goto dai_scan_done;
3848                                         }
3849                                 }
3850                         } /* lun table for a session */
3851                 } /* sessions */
3852                 rw_exit(&ilport->ilport_lock);
3853         } /* ports */
3854 
3855 dai_scan_done:
3856         mutex_exit(&stmf_state.stmf_lock);
3857 
3858         for (i = 0; i < nu; i++) {
3859                 stmf_do_itl_dereg(lu, itl_list[i],
3860                     STMF_ITL_REASON_DEREG_REQUEST);
3861         }
3862         kmem_free(itl_list, nmaps * sizeof (stmf_itl_data_t *));
3863 
3864         return (STMF_SUCCESS);
3865 }
3866 
3867 stmf_status_t
3868 stmf_get_itl_handle(stmf_lu_t *lu, uint8_t *lun, stmf_scsi_session_t *ss,
3869     uint64_t session_id, void **itl_handle_retp)
3870 {
3871         stmf_i_scsi_session_t *iss;
3872         stmf_lun_map_ent_t *ent;
3873         stmf_lun_map_t *lm;
3874         stmf_status_t ret;
3875         int i;
3876         uint16_t n;
3877 
3878         if (ss == NULL) {
3879                 iss = stmf_session_id_to_issptr(session_id, 1);
3880                 if (iss == NULL)
3881                         return (STMF_NOT_FOUND);
3882         } else {
3883                 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3884                 rw_enter(iss->iss_lockp, RW_WRITER);
3885         }
3886 
3887         ent = NULL;
3888         if (lun == NULL) {
3889                 lm = iss->iss_sm;
3890                 for (i = 0; i < lm->lm_nentries; i++) {
3891                         if (lm->lm_plus[i] == NULL)
3892                                 continue;
3893                         ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
3894                         if (ent->ent_lu == lu)
3895                                 break;
3896                 }
3897         } else {
3898                 n = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
3899                 ent = (stmf_lun_map_ent_t *)
3900                     stmf_get_ent_from_map(iss->iss_sm, n);
3901                 if (lu && (ent->ent_lu != lu))
3902                         ent = NULL;
3903         }
3904         if (ent && ent->ent_itl_datap) {
3905                 *itl_handle_retp = ent->ent_itl_datap->itl_handle;
3906                 ret = STMF_SUCCESS;
3907         } else {
3908                 ret = STMF_NOT_FOUND;
3909         }
3910 
3911         rw_exit(iss->iss_lockp);
3912         return (ret);
3913 }
3914 
3915 stmf_data_buf_t *
3916 stmf_alloc_dbuf(scsi_task_t *task, uint32_t size, uint32_t *pminsize,
3917     uint32_t flags)
3918 {
3919         stmf_i_scsi_task_t *itask =
3920             (stmf_i_scsi_task_t *)task->task_stmf_private;
3921         stmf_local_port_t *lport = task->task_lport;
3922         stmf_data_buf_t *dbuf;
3923         uint8_t ndx;
3924 
3925         ndx = stmf_first_zero[itask->itask_allocated_buf_map];
3926         if (ndx == 0xff)
3927                 return (NULL);
3928         dbuf = itask->itask_dbufs[ndx] = lport->lport_ds->ds_alloc_data_buf(
3929             task, size, pminsize, flags);
3930         if (dbuf) {
3931                 task->task_cur_nbufs++;
3932                 itask->itask_allocated_buf_map |= (1 << ndx);
3933                 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
3934                 dbuf->db_handle = ndx;
3935                 return (dbuf);
3936         }
3937 
3938         return (NULL);
3939 }
3940 
3941 stmf_status_t
3942 stmf_setup_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t flags)
3943 {
3944         stmf_i_scsi_task_t *itask =
3945             (stmf_i_scsi_task_t *)task->task_stmf_private;
3946         stmf_local_port_t *lport = task->task_lport;
3947         uint8_t ndx;
3948         stmf_status_t ret;
3949 
3950         ASSERT(task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF);
3951         ASSERT(lport->lport_ds->ds_setup_dbuf != NULL);
3952         ASSERT(dbuf->db_flags & DB_LU_DATA_BUF);
3953 
3954         if ((task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF) == 0)
3955                 return (STMF_FAILURE);
3956         if (lport->lport_ds->ds_setup_dbuf == NULL)
3957                 return (STMF_FAILURE);
3958 
3959         ndx = stmf_first_zero[itask->itask_allocated_buf_map];
3960         if (ndx == 0xff)
3961                 return (STMF_FAILURE);
3962         ret = lport->lport_ds->ds_setup_dbuf(task, dbuf, flags);
3963         if (ret == STMF_FAILURE)
3964                 return (STMF_FAILURE);
3965         itask->itask_dbufs[ndx] = dbuf;
3966         task->task_cur_nbufs++;
3967         itask->itask_allocated_buf_map |= (1 << ndx);
3968         dbuf->db_handle = ndx;
3969 
3970         return (STMF_SUCCESS);
3971 }
3972 
3973 void
3974 stmf_teardown_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf)
3975 {
3976         stmf_i_scsi_task_t *itask =
3977             (stmf_i_scsi_task_t *)task->task_stmf_private;
3978         stmf_local_port_t *lport = task->task_lport;
3979 
3980         ASSERT(task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF);
3981         ASSERT(lport->lport_ds->ds_teardown_dbuf != NULL);
3982         ASSERT(dbuf->db_flags & DB_LU_DATA_BUF);
3983 
3984         itask->itask_allocated_buf_map &= ~(1 << dbuf->db_handle);
3985         task->task_cur_nbufs--;
3986         lport->lport_ds->ds_teardown_dbuf(lport->lport_ds, dbuf);
3987 }
3988 
3989 void
3990 stmf_free_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf)
3991 {
3992         stmf_i_scsi_task_t *itask =
3993             (stmf_i_scsi_task_t *)task->task_stmf_private;
3994         stmf_local_port_t *lport = task->task_lport;
3995 
3996         itask->itask_allocated_buf_map &= ~(1 << dbuf->db_handle);
3997         task->task_cur_nbufs--;
3998         lport->lport_ds->ds_free_data_buf(lport->lport_ds, dbuf);
3999 }
4000 
4001 stmf_data_buf_t *
4002 stmf_handle_to_buf(scsi_task_t *task, uint8_t h)
4003 {
4004         stmf_i_scsi_task_t *itask;
4005 
4006         itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4007         if (h > 3)
4008                 return (NULL);
4009         return (itask->itask_dbufs[h]);
4010 }
4011 
4012 /* ARGSUSED */
4013 struct scsi_task *
4014 stmf_task_alloc(struct stmf_local_port *lport, stmf_scsi_session_t *ss,
4015                         uint8_t *lun, uint16_t cdb_length_in, uint16_t ext_id)
4016 {
4017         stmf_lu_t *lu;
4018         stmf_i_scsi_session_t *iss;
4019         stmf_i_lu_t *ilu;
4020         stmf_i_scsi_task_t *itask;
4021         stmf_i_scsi_task_t **ppitask;
4022         scsi_task_t *task;
4023         uint8_t *l;
4024         stmf_lun_map_ent_t *lun_map_ent;
4025         uint16_t cdb_length;
4026         uint16_t luNbr;
4027         uint8_t new_task = 0;
4028 
4029         /*
4030          * We allocate 7 extra bytes for CDB to provide a cdb pointer which
4031          * is guaranteed to be 8 byte aligned. Some LU providers like OSD
4032          * depend upon this alignment.
4033          */
4034         if (cdb_length_in >= 16)
4035                 cdb_length = cdb_length_in + 7;
4036         else
4037                 cdb_length = 16 + 7;
4038         iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
4039         luNbr = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
4040         rw_enter(iss->iss_lockp, RW_READER);
4041         lun_map_ent =
4042             (stmf_lun_map_ent_t *)stmf_get_ent_from_map(iss->iss_sm, luNbr);
4043         if (!lun_map_ent) {
4044                 lu = dlun0;
4045         } else {
4046                 lu = lun_map_ent->ent_lu;
4047         }
4048         ilu = lu->lu_stmf_private;
4049         if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4050                 rw_exit(iss->iss_lockp);
4051                 return (NULL);
4052         }
4053         ASSERT(lu == dlun0 || (ilu->ilu_state != STMF_STATE_OFFLINING &&
4054             ilu->ilu_state != STMF_STATE_OFFLINE));
4055         do {
4056                 if (ilu->ilu_free_tasks == NULL) {
4057                         new_task = 1;
4058                         break;
4059                 }
4060                 mutex_enter(&ilu->ilu_task_lock);
4061                 for (ppitask = &ilu->ilu_free_tasks; (*ppitask != NULL) &&
4062                     ((*ppitask)->itask_cdb_buf_size < cdb_length);
4063                     ppitask = &((*ppitask)->itask_lu_free_next))
4064                         ;
4065                 if (*ppitask) {
4066                         itask = *ppitask;
4067                         *ppitask = (*ppitask)->itask_lu_free_next;
4068                         ilu->ilu_ntasks_free--;
4069                         if (ilu->ilu_ntasks_free < ilu->ilu_ntasks_min_free)
4070                                 ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4071                 } else {
4072                         new_task = 1;
4073                 }
4074                 mutex_exit(&ilu->ilu_task_lock);
4075         /* CONSTCOND */
4076         } while (0);
4077 
4078         if (!new_task) {
4079                 /*
4080                  * Save the task_cdb pointer and zero per cmd fields.
4081                  * We know the task_cdb_length is large enough by task
4082                  * selection process above.
4083                  */
4084                 uint8_t *save_cdb;
4085                 uintptr_t t_start, t_end;
4086 
4087                 task = itask->itask_task;
4088                 save_cdb = task->task_cdb;   /* save */
4089                 t_start = (uintptr_t)&task->task_flags;
4090                 t_end = (uintptr_t)&task->task_extended_cmd;
4091                 bzero((void *)t_start, (size_t)(t_end - t_start));
4092                 task->task_cdb = save_cdb;   /* restore */
4093                 itask->itask_ncmds = 0;
4094         } else {
4095                 task = (scsi_task_t *)stmf_alloc(STMF_STRUCT_SCSI_TASK,
4096                     cdb_length, AF_FORCE_NOSLEEP);
4097                 if (task == NULL) {
4098                         rw_exit(iss->iss_lockp);
4099                         return (NULL);
4100                 }
4101                 task->task_lu = lu;
4102                 l = task->task_lun_no;
4103                 l[0] = lun[0];
4104                 l[1] = lun[1];
4105                 l[2] = lun[2];
4106                 l[3] = lun[3];
4107                 l[4] = lun[4];
4108                 l[5] = lun[5];
4109                 l[6] = lun[6];
4110                 l[7] = lun[7];
4111                 task->task_cdb = (uint8_t *)task->task_port_private;
4112                 if ((ulong_t)(task->task_cdb) & 7ul) {
4113                         task->task_cdb = (uint8_t *)(((ulong_t)
4114                             (task->task_cdb) + 7ul) & ~(7ul));
4115                 }
4116                 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4117                 itask->itask_cdb_buf_size = cdb_length;
4118                 mutex_init(&itask->itask_audit_mutex, NULL, MUTEX_DRIVER, NULL);
4119         }
4120         task->task_session = ss;
4121         task->task_lport = lport;
4122         task->task_cdb_length = cdb_length_in;
4123         itask->itask_flags = ITASK_IN_TRANSITION;
4124         itask->itask_waitq_time = 0;
4125         itask->itask_lu_read_time = itask->itask_lu_write_time = 0;
4126         itask->itask_lport_read_time = itask->itask_lport_write_time = 0;
4127         itask->itask_read_xfer = itask->itask_write_xfer = 0;
4128         itask->itask_audit_index = 0;
4129 
4130         if (new_task) {
4131                 if (lu->lu_task_alloc(task) != STMF_SUCCESS) {
4132                         rw_exit(iss->iss_lockp);
4133                         stmf_free(task);
4134                         return (NULL);
4135                 }
4136                 mutex_enter(&ilu->ilu_task_lock);
4137                 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4138                         mutex_exit(&ilu->ilu_task_lock);
4139                         rw_exit(iss->iss_lockp);
4140                         stmf_free(task);
4141                         return (NULL);
4142                 }
4143                 itask->itask_lu_next = ilu->ilu_tasks;
4144                 if (ilu->ilu_tasks)
4145                         ilu->ilu_tasks->itask_lu_prev = itask;
4146                 ilu->ilu_tasks = itask;
4147                 /* kmem_zalloc automatically makes itask->itask_lu_prev NULL */
4148                 ilu->ilu_ntasks++;
4149                 mutex_exit(&ilu->ilu_task_lock);
4150         }
4151 
4152         itask->itask_ilu_task_cntr = ilu->ilu_cur_task_cntr;
4153         atomic_inc_32(itask->itask_ilu_task_cntr);
4154         itask->itask_start_time = ddi_get_lbolt();
4155 
4156         if ((lun_map_ent != NULL) && ((itask->itask_itl_datap =
4157             lun_map_ent->ent_itl_datap) != NULL)) {
4158                 atomic_inc_32(&itask->itask_itl_datap->itl_counter);
4159                 task->task_lu_itl_handle = itask->itask_itl_datap->itl_handle;
4160         } else {
4161                 itask->itask_itl_datap = NULL;
4162                 task->task_lu_itl_handle = NULL;
4163         }
4164 
4165         rw_exit(iss->iss_lockp);
4166         return (task);
4167 }
4168 
4169 static void
4170 stmf_task_lu_free(scsi_task_t *task, stmf_i_scsi_session_t *iss)
4171 {
4172         stmf_i_scsi_task_t *itask =
4173             (stmf_i_scsi_task_t *)task->task_stmf_private;
4174         stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
4175 
4176         ASSERT(rw_lock_held(iss->iss_lockp));
4177         itask->itask_flags = ITASK_IN_FREE_LIST;
4178         itask->itask_proxy_msg_id = 0;
4179         mutex_enter(&ilu->ilu_task_lock);
4180         itask->itask_lu_free_next = ilu->ilu_free_tasks;
4181         ilu->ilu_free_tasks = itask;
4182         ilu->ilu_ntasks_free++;
4183         if (ilu->ilu_ntasks == ilu->ilu_ntasks_free)
4184                 cv_signal(&ilu->ilu_offline_pending_cv);
4185         mutex_exit(&ilu->ilu_task_lock);
4186         atomic_dec_32(itask->itask_ilu_task_cntr);
4187 }
4188 
4189 void
4190 stmf_task_lu_check_freelist(stmf_i_lu_t *ilu)
4191 {
4192         uint32_t        num_to_release, ndx;
4193         stmf_i_scsi_task_t *itask;
4194         stmf_lu_t       *lu = ilu->ilu_lu;
4195 
4196         ASSERT(ilu->ilu_ntasks_min_free <= ilu->ilu_ntasks_free);
4197 
4198         /* free half of the minimal free of the free tasks */
4199         num_to_release = (ilu->ilu_ntasks_min_free + 1) / 2;
4200         if (!num_to_release) {
4201                 return;
4202         }
4203         for (ndx = 0; ndx < num_to_release; ndx++) {
4204                 mutex_enter(&ilu->ilu_task_lock);
4205                 itask = ilu->ilu_free_tasks;
4206                 if (itask == NULL) {
4207                         mutex_exit(&ilu->ilu_task_lock);
4208                         break;
4209                 }
4210                 ilu->ilu_free_tasks = itask->itask_lu_free_next;
4211                 ilu->ilu_ntasks_free--;
4212                 mutex_exit(&ilu->ilu_task_lock);
4213 
4214                 lu->lu_task_free(itask->itask_task);
4215                 mutex_enter(&ilu->ilu_task_lock);
4216                 if (itask->itask_lu_next)
4217                         itask->itask_lu_next->itask_lu_prev =
4218                             itask->itask_lu_prev;
4219                 if (itask->itask_lu_prev)
4220                         itask->itask_lu_prev->itask_lu_next =
4221                             itask->itask_lu_next;
4222                 else
4223                         ilu->ilu_tasks = itask->itask_lu_next;
4224 
4225                 ilu->ilu_ntasks--;
4226                 mutex_exit(&ilu->ilu_task_lock);
4227                 stmf_free(itask->itask_task);
4228         }
4229 }
4230 
4231 /*
4232  * Called with stmf_lock held
4233  */
4234 void
4235 stmf_check_freetask()
4236 {
4237         stmf_i_lu_t *ilu;
4238         clock_t endtime = ddi_get_lbolt() + drv_usectohz(10000);
4239 
4240         /* stmf_svc_ilu_draining may get changed after stmf_lock is released */
4241         while ((ilu = stmf_state.stmf_svc_ilu_draining) != NULL) {
4242                 stmf_state.stmf_svc_ilu_draining = ilu->ilu_next;
4243                 if (!ilu->ilu_ntasks_min_free) {
4244                         ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4245                         continue;
4246                 }
4247                 ilu->ilu_flags |= ILU_STALL_DEREGISTER;
4248                 mutex_exit(&stmf_state.stmf_lock);
4249                 stmf_task_lu_check_freelist(ilu);
4250                 /*
4251                  * we do not care about the accuracy of
4252                  * ilu_ntasks_min_free, so we don't lock here
4253                  */
4254                 ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4255                 mutex_enter(&stmf_state.stmf_lock);
4256                 ilu->ilu_flags &= ~ILU_STALL_DEREGISTER;
4257                 cv_broadcast(&stmf_state.stmf_cv);
4258                 if (ddi_get_lbolt() >= endtime)
4259                         break;
4260         }
4261 }
4262 
4263 void
4264 stmf_do_ilu_timeouts(stmf_i_lu_t *ilu)
4265 {
4266         clock_t l = ddi_get_lbolt();
4267         clock_t ps = drv_usectohz(1000000);
4268         stmf_i_scsi_task_t *itask;
4269         scsi_task_t *task;
4270         uint32_t to;
4271 
4272         mutex_enter(&ilu->ilu_task_lock);
4273         for (itask = ilu->ilu_tasks; itask != NULL;
4274             itask = itask->itask_lu_next) {
4275                 if (itask->itask_flags & (ITASK_IN_FREE_LIST |
4276                     ITASK_BEING_ABORTED)) {
4277                         continue;
4278                 }
4279                 task = itask->itask_task;
4280                 if (task->task_timeout == 0)
4281                         to = stmf_default_task_timeout;
4282                 else
4283                         to = task->task_timeout;
4284                 if ((itask->itask_start_time + (to * ps)) > l)
4285                         continue;
4286                 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
4287                     STMF_TIMEOUT, NULL);
4288         }
4289         mutex_exit(&ilu->ilu_task_lock);
4290 }
4291 
4292 /*
4293  * Called with stmf_lock held
4294  */
4295 void
4296 stmf_check_ilu_timing()
4297 {
4298         stmf_i_lu_t *ilu;
4299         clock_t endtime = ddi_get_lbolt() + drv_usectohz(10000);
4300 
4301         /* stmf_svc_ilu_timing may get changed after stmf_lock is released */
4302         while ((ilu = stmf_state.stmf_svc_ilu_timing) != NULL) {
4303                 stmf_state.stmf_svc_ilu_timing = ilu->ilu_next;
4304                 if (ilu->ilu_cur_task_cntr == (&ilu->ilu_task_cntr1)) {
4305                         if (ilu->ilu_task_cntr2 == 0) {
4306                                 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr2;
4307                                 continue;
4308                         }
4309                 } else {
4310                         if (ilu->ilu_task_cntr1 == 0) {
4311                                 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
4312                                 continue;
4313                         }
4314                 }
4315                 /*
4316                  * If we are here then it means that there is some slowdown
4317                  * in tasks on this lu. We need to check.
4318                  */
4319                 ilu->ilu_flags |= ILU_STALL_DEREGISTER;
4320                 mutex_exit(&stmf_state.stmf_lock);
4321                 stmf_do_ilu_timeouts(ilu);
4322                 mutex_enter(&stmf_state.stmf_lock);
4323                 ilu->ilu_flags &= ~ILU_STALL_DEREGISTER;
4324                 cv_broadcast(&stmf_state.stmf_cv);
4325                 if (ddi_get_lbolt() >= endtime)
4326                         break;
4327         }
4328 }
4329 
4330 /*
4331  * Kills all tasks on a lu except tm_task
4332  */
4333 void
4334 stmf_task_lu_killall(stmf_lu_t *lu, scsi_task_t *tm_task, stmf_status_t s)
4335 {
4336         stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
4337         stmf_i_scsi_task_t *itask;
4338 
4339         mutex_enter(&ilu->ilu_task_lock);
4340 
4341         for (itask = ilu->ilu_tasks; itask != NULL;
4342             itask = itask->itask_lu_next) {
4343                 if (itask->itask_flags & ITASK_IN_FREE_LIST)
4344                         continue;
4345                 if (itask->itask_task == tm_task)
4346                         continue;
4347                 stmf_abort(STMF_QUEUE_TASK_ABORT, itask->itask_task, s, NULL);
4348         }
4349         mutex_exit(&ilu->ilu_task_lock);
4350 }
4351 
4352 void
4353 stmf_free_task_bufs(stmf_i_scsi_task_t *itask, stmf_local_port_t *lport)
4354 {
4355         int i;
4356         uint8_t map;
4357 
4358         if ((map = itask->itask_allocated_buf_map) == 0)
4359                 return;
4360         for (i = 0; i < 4; i++) {
4361                 if (map & 1) {
4362                         stmf_data_buf_t *dbuf;
4363 
4364                         dbuf = itask->itask_dbufs[i];
4365                         if (dbuf->db_xfer_start_timestamp) {
4366                                 stmf_lport_xfer_done(itask, dbuf);
4367                         }
4368                         if (dbuf->db_flags & DB_LU_DATA_BUF) {
4369                                 /*
4370                                  * LU needs to clean up buffer.
4371                                  * LU is required to free the buffer
4372                                  * in the xfer_done handler.
4373                                  */
4374                                 scsi_task_t *task = itask->itask_task;
4375                                 stmf_lu_t *lu = task->task_lu;
4376 
4377                                 lu->lu_dbuf_free(task, dbuf);
4378                                 ASSERT(((itask->itask_allocated_buf_map>>i)
4379                                     & 1) == 0); /* must be gone */
4380                         } else {
4381                                 ASSERT(dbuf->db_lu_private == NULL);
4382                                 dbuf->db_lu_private = NULL;
4383                                 lport->lport_ds->ds_free_data_buf(
4384                                     lport->lport_ds, dbuf);
4385                         }
4386                 }
4387                 map >>= 1;
4388         }
4389         itask->itask_allocated_buf_map = 0;
4390 }
4391 
4392 void
4393 stmf_task_free(scsi_task_t *task)
4394 {
4395         stmf_local_port_t *lport = task->task_lport;
4396         stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
4397             task->task_stmf_private;
4398         stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
4399             task->task_session->ss_stmf_private;
4400 
4401         stmf_task_audit(itask, TE_TASK_FREE, CMD_OR_IOF_NA, NULL);
4402 
4403         stmf_free_task_bufs(itask, lport);
4404         stmf_itl_task_done(itask);
4405         DTRACE_PROBE2(stmf__task__end, scsi_task_t *, task,
4406             hrtime_t,
4407             itask->itask_done_timestamp - itask->itask_start_timestamp);
4408         if (itask->itask_itl_datap) {
4409                 if (atomic_dec_32_nv(&itask->itask_itl_datap->itl_counter) ==
4410                     0) {
4411                         stmf_release_itl_handle(task->task_lu,
4412                             itask->itask_itl_datap);
4413                 }
4414         }
4415 
4416         rw_enter(iss->iss_lockp, RW_READER);
4417         lport->lport_task_free(task);
4418         if (itask->itask_worker) {
4419                 atomic_dec_32(&stmf_cur_ntasks);
4420                 atomic_dec_32(&itask->itask_worker->worker_ref_count);
4421         }
4422         /*
4423          * After calling stmf_task_lu_free, the task pointer can no longer
4424          * be trusted.
4425          */
4426         stmf_task_lu_free(task, iss);
4427         rw_exit(iss->iss_lockp);
4428 }
4429 
4430 void
4431 stmf_post_task(scsi_task_t *task, stmf_data_buf_t *dbuf)
4432 {
4433         stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
4434             task->task_stmf_private;
4435         stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
4436         int nv;
4437         uint32_t old, new;
4438         uint32_t ct;
4439         stmf_worker_t *w, *w1;
4440         uint8_t tm;
4441 
4442         if (task->task_max_nbufs > 4)
4443                 task->task_max_nbufs = 4;
4444         task->task_cur_nbufs = 0;
4445         /* Latest value of currently running tasks */
4446         ct = atomic_inc_32_nv(&stmf_cur_ntasks);
4447 
4448         /* Select the next worker using round robin */
4449         nv = (int)atomic_inc_32_nv((uint32_t *)&stmf_worker_sel_counter);
4450         if (nv >= stmf_nworkers_accepting_cmds) {
4451                 int s = nv;
4452                 do {
4453                         nv -= stmf_nworkers_accepting_cmds;
4454                 } while (nv >= stmf_nworkers_accepting_cmds);
4455                 if (nv < 0)
4456                         nv = 0;
4457                 /* Its ok if this cas fails */
4458                 (void) atomic_cas_32((uint32_t *)&stmf_worker_sel_counter,
4459                     s, nv);
4460         }
4461         w = &stmf_workers[nv];
4462 
4463         /*
4464          * A worker can be pinned by interrupt. So select the next one
4465          * if it has lower load.
4466          */
4467         if ((nv + 1) >= stmf_nworkers_accepting_cmds) {
4468                 w1 = stmf_workers;
4469         } else {
4470                 w1 = &stmf_workers[nv + 1];
4471         }
4472         if (w1->worker_queue_depth < w->worker_queue_depth)
4473                 w = w1;
4474 
4475         mutex_enter(&w->worker_lock);
4476         if (((w->worker_flags & STMF_WORKER_STARTED) == 0) ||
4477             (w->worker_flags & STMF_WORKER_TERMINATE)) {
4478                 /*
4479                  * Maybe we are in the middle of a change. Just go to
4480                  * the 1st worker.
4481                  */
4482                 mutex_exit(&w->worker_lock);
4483                 w = stmf_workers;
4484                 mutex_enter(&w->worker_lock);
4485         }
4486         itask->itask_worker = w;
4487         /*
4488          * Track max system load inside the worker as we already have the
4489          * worker lock (no point implementing another lock). The service
4490          * thread will do the comparisons and figure out the max overall
4491          * system load.
4492          */
4493         if (w->worker_max_sys_qdepth_pu < ct)
4494                 w->worker_max_sys_qdepth_pu = ct;
4495 
4496         do {
4497                 old = new = itask->itask_flags;
4498                 new |= ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE;
4499                 if (task->task_mgmt_function) {
4500                         tm = task->task_mgmt_function;
4501                         if ((tm == TM_TARGET_RESET) ||
4502                             (tm == TM_TARGET_COLD_RESET) ||
4503                             (tm == TM_TARGET_WARM_RESET)) {
4504                                 new |= ITASK_DEFAULT_HANDLING;
4505                         }
4506                 } else if (task->task_cdb[0] == SCMD_REPORT_LUNS) {
4507                         new |= ITASK_DEFAULT_HANDLING;
4508                 }
4509                 new &= ~ITASK_IN_TRANSITION;
4510         } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4511 
4512         stmf_itl_task_start(itask);
4513 
4514         itask->itask_worker_next = NULL;
4515         if (w->worker_task_tail) {
4516                 w->worker_task_tail->itask_worker_next = itask;
4517         } else {
4518                 w->worker_task_head = itask;
4519         }
4520         w->worker_task_tail = itask;
4521         if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4522                 w->worker_max_qdepth_pu = w->worker_queue_depth;
4523         }
4524         /* Measure task waitq time */
4525         itask->itask_waitq_enter_timestamp = gethrtime();
4526         atomic_inc_32(&w->worker_ref_count);
4527         itask->itask_cmd_stack[0] = ITASK_CMD_NEW_TASK;
4528         itask->itask_ncmds = 1;
4529         stmf_task_audit(itask, TE_TASK_START, CMD_OR_IOF_NA, dbuf);
4530         if (dbuf) {
4531                 itask->itask_allocated_buf_map = 1;
4532                 itask->itask_dbufs[0] = dbuf;
4533                 dbuf->db_handle = 0;
4534         } else {
4535                 itask->itask_allocated_buf_map = 0;
4536                 itask->itask_dbufs[0] = NULL;
4537         }
4538 
4539         if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0) {
4540                 w->worker_signal_timestamp = gethrtime();
4541                 DTRACE_PROBE2(worker__signal, stmf_worker_t *, w,
4542                     scsi_task_t *, task);
4543                 cv_signal(&w->worker_cv);
4544         }
4545         mutex_exit(&w->worker_lock);
4546 
4547         /*
4548          * This can only happen if during stmf_task_alloc(), ILU_RESET_ACTIVE
4549          * was set between checking of ILU_RESET_ACTIVE and clearing of the
4550          * ITASK_IN_FREE_LIST flag. Take care of these "sneaked-in" tasks here.
4551          */
4552         if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4553                 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ABORTED, NULL);
4554         }
4555 }
4556 
4557 static void
4558 stmf_task_audit(stmf_i_scsi_task_t *itask,
4559     task_audit_event_t te, uint32_t cmd_or_iof, stmf_data_buf_t *dbuf)
4560 {
4561         stmf_task_audit_rec_t *ar;
4562 
4563         mutex_enter(&itask->itask_audit_mutex);
4564         ar = &itask->itask_audit_records[itask->itask_audit_index++];
4565         itask->itask_audit_index &= (ITASK_TASK_AUDIT_DEPTH - 1);
4566         ar->ta_event = te;
4567         ar->ta_cmd_or_iof = cmd_or_iof;
4568         ar->ta_itask_flags = itask->itask_flags;
4569         ar->ta_dbuf = dbuf;
4570         gethrestime(&ar->ta_timestamp);
4571         mutex_exit(&itask->itask_audit_mutex);
4572 }
4573 
4574 
4575 /*
4576  * ++++++++++++++ ABORT LOGIC ++++++++++++++++++++
4577  * Once ITASK_BEING_ABORTED is set, ITASK_KNOWN_TO_LU can be reset already
4578  * i.e. before ITASK_BEING_ABORTED being set. But if it was not, it cannot
4579  * be reset until the LU explicitly calls stmf_task_lu_aborted(). Of course
4580  * the LU will make this call only if we call the LU's abort entry point.
4581  * we will only call that entry point if ITASK_KNOWN_TO_LU was set.
4582  *
4583  * Same logic applies for the port.
4584  *
4585  * Also ITASK_BEING_ABORTED will not be allowed to set if both KNOWN_TO_LU
4586  * and KNOWN_TO_TGT_PORT are reset.
4587  *
4588  * +++++++++++++++++++++++++++++++++++++++++++++++
4589  */
4590 
4591 stmf_status_t
4592 stmf_xfer_data(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t ioflags)
4593 {
4594         stmf_status_t ret = STMF_SUCCESS;
4595 
4596         stmf_i_scsi_task_t *itask =
4597             (stmf_i_scsi_task_t *)task->task_stmf_private;
4598 
4599         stmf_task_audit(itask, TE_XFER_START, ioflags, dbuf);
4600 
4601         if (ioflags & STMF_IOF_LU_DONE) {
4602                 uint32_t new, old;
4603                 do {
4604                         new = old = itask->itask_flags;
4605                         if (new & ITASK_BEING_ABORTED)
4606                                 return (STMF_ABORTED);
4607                         new &= ~ITASK_KNOWN_TO_LU;
4608                 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4609         }
4610         if (itask->itask_flags & ITASK_BEING_ABORTED)
4611                 return (STMF_ABORTED);
4612 #ifdef  DEBUG
4613         if (!(ioflags & STMF_IOF_STATS_ONLY) && stmf_drop_buf_counter > 0) {
4614                 if (atomic_dec_32_nv(&stmf_drop_buf_counter) == 1)
4615                         return (STMF_SUCCESS);
4616         }
4617 #endif
4618 
4619         stmf_update_kstat_lu_io(task, dbuf);
4620         stmf_update_kstat_lport_io(task, dbuf);
4621         stmf_lport_xfer_start(itask, dbuf);
4622         if (ioflags & STMF_IOF_STATS_ONLY) {
4623                 stmf_lport_xfer_done(itask, dbuf);
4624                 return (STMF_SUCCESS);
4625         }
4626 
4627         dbuf->db_flags |= DB_LPORT_XFER_ACTIVE;
4628         ret = task->task_lport->lport_xfer_data(task, dbuf, ioflags);
4629 
4630         /*
4631          * Port provider may have already called the buffer callback in
4632          * which case dbuf->db_xfer_start_timestamp will be 0.
4633          */
4634         if (ret != STMF_SUCCESS) {
4635                 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
4636                 if (dbuf->db_xfer_start_timestamp != 0)
4637                         stmf_lport_xfer_done(itask, dbuf);
4638         }
4639 
4640         return (ret);
4641 }
4642 
4643 void
4644 stmf_data_xfer_done(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t iof)
4645 {
4646         stmf_i_scsi_task_t *itask =
4647             (stmf_i_scsi_task_t *)task->task_stmf_private;
4648         stmf_i_local_port_t *ilport;
4649         stmf_worker_t *w = itask->itask_worker;
4650         uint32_t new, old;
4651         uint8_t update_queue_flags, free_it, queue_it;
4652 
4653         stmf_lport_xfer_done(itask, dbuf);
4654 
4655         stmf_task_audit(itask, TE_XFER_DONE, iof, dbuf);
4656 
4657         /* Guard against unexpected completions from the lport */
4658         if (dbuf->db_flags & DB_LPORT_XFER_ACTIVE) {
4659                 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
4660         } else {
4661                 /*
4662                  * This should never happen.
4663                  */
4664                 ilport = task->task_lport->lport_stmf_private;
4665                 ilport->ilport_unexpected_comp++;
4666                 cmn_err(CE_PANIC, "Unexpected xfer completion task %p dbuf %p",
4667                     (void *)task, (void *)dbuf);
4668                 return;
4669         }
4670 
4671         mutex_enter(&w->worker_lock);
4672         do {
4673                 new = old = itask->itask_flags;
4674                 if (old & ITASK_BEING_ABORTED) {
4675                         mutex_exit(&w->worker_lock);
4676                         return;
4677                 }
4678                 free_it = 0;
4679                 if (iof & STMF_IOF_LPORT_DONE) {
4680                         new &= ~ITASK_KNOWN_TO_TGT_PORT;
4681                         task->task_completion_status = dbuf->db_xfer_status;
4682                         free_it = 1;
4683                 }
4684                 /*
4685                  * If the task is known to LU then queue it. But if
4686                  * it is already queued (multiple completions) then
4687                  * just update the buffer information by grabbing the
4688                  * worker lock. If the task is not known to LU,
4689                  * completed/aborted, then see if we need to
4690                  * free this task.
4691                  */
4692                 if (old & ITASK_KNOWN_TO_LU) {
4693                         free_it = 0;
4694                         update_queue_flags = 1;
4695                         if (old & ITASK_IN_WORKER_QUEUE) {
4696                                 queue_it = 0;
4697                         } else {
4698                                 queue_it = 1;
4699                                 new |= ITASK_IN_WORKER_QUEUE;
4700                         }
4701                 } else {
4702                         update_queue_flags = 0;
4703                         queue_it = 0;
4704                 }
4705         } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4706 
4707         if (update_queue_flags) {
4708                 uint8_t cmd = (dbuf->db_handle << 5) | ITASK_CMD_DATA_XFER_DONE;
4709 
4710                 ASSERT(itask->itask_ncmds < ITASK_MAX_NCMDS);
4711                 itask->itask_cmd_stack[itask->itask_ncmds++] = cmd;
4712                 if (queue_it) {
4713                         itask->itask_worker_next = NULL;
4714                         if (w->worker_task_tail) {
4715                                 w->worker_task_tail->itask_worker_next = itask;
4716                         } else {
4717                                 w->worker_task_head = itask;
4718                         }
4719                         w->worker_task_tail = itask;
4720                         /* Measure task waitq time */
4721                         itask->itask_waitq_enter_timestamp = gethrtime();
4722                         if (++(w->worker_queue_depth) >
4723                             w->worker_max_qdepth_pu) {
4724                                 w->worker_max_qdepth_pu = w->worker_queue_depth;
4725                         }
4726                         if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4727                                 cv_signal(&w->worker_cv);
4728                 }
4729         }
4730         mutex_exit(&w->worker_lock);
4731 
4732         if (free_it) {
4733                 if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4734                     ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4735                     ITASK_BEING_ABORTED)) == 0) {
4736                         stmf_task_free(task);
4737                 }
4738         }
4739 }
4740 
4741 stmf_status_t
4742 stmf_send_scsi_status(scsi_task_t *task, uint32_t ioflags)
4743 {
4744         DTRACE_PROBE1(scsi__send__status, scsi_task_t *, task);
4745 
4746         stmf_i_scsi_task_t *itask =
4747             (stmf_i_scsi_task_t *)task->task_stmf_private;
4748 
4749         stmf_task_audit(itask, TE_SEND_STATUS, ioflags, NULL);
4750 
4751         if (ioflags & STMF_IOF_LU_DONE) {
4752                 uint32_t new, old;
4753                 do {
4754                         new = old = itask->itask_flags;
4755                         if (new & ITASK_BEING_ABORTED)
4756                                 return (STMF_ABORTED);
4757                         new &= ~ITASK_KNOWN_TO_LU;
4758                 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4759         }
4760 
4761         if (!(itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT)) {
4762                 return (STMF_SUCCESS);
4763         }
4764 
4765         if (itask->itask_flags & ITASK_BEING_ABORTED)
4766                 return (STMF_ABORTED);
4767 
4768         if (task->task_additional_flags & TASK_AF_NO_EXPECTED_XFER_LENGTH) {
4769                 task->task_status_ctrl = 0;
4770                 task->task_resid = 0;
4771         } else if (task->task_cmd_xfer_length >
4772             task->task_expected_xfer_length) {
4773                 task->task_status_ctrl = TASK_SCTRL_OVER;
4774                 task->task_resid = task->task_cmd_xfer_length -
4775                     task->task_expected_xfer_length;
4776         } else if (task->task_nbytes_transferred <
4777             task->task_expected_xfer_length) {
4778                 task->task_status_ctrl = TASK_SCTRL_UNDER;
4779                 task->task_resid = task->task_expected_xfer_length -
4780                     task->task_nbytes_transferred;
4781         } else {
4782                 task->task_status_ctrl = 0;
4783                 task->task_resid = 0;
4784         }
4785         return (task->task_lport->lport_send_status(task, ioflags));
4786 }
4787 
4788 void
4789 stmf_send_status_done(scsi_task_t *task, stmf_status_t s, uint32_t iof)
4790 {
4791         stmf_i_scsi_task_t *itask =
4792             (stmf_i_scsi_task_t *)task->task_stmf_private;
4793         stmf_worker_t *w = itask->itask_worker;
4794         uint32_t new, old;
4795         uint8_t free_it, queue_it;
4796 
4797         stmf_task_audit(itask, TE_SEND_STATUS_DONE, iof, NULL);
4798 
4799         mutex_enter(&w->worker_lock);
4800         do {
4801                 new = old = itask->itask_flags;
4802                 if (old & ITASK_BEING_ABORTED) {
4803                         mutex_exit(&w->worker_lock);
4804                         return;
4805                 }
4806                 free_it = 0;
4807                 if (iof & STMF_IOF_LPORT_DONE) {
4808                         new &= ~ITASK_KNOWN_TO_TGT_PORT;
4809                         free_it = 1;
4810                 }
4811                 /*
4812                  * If the task is known to LU then queue it. But if
4813                  * it is already queued (multiple completions) then
4814                  * just update the buffer information by grabbing the
4815                  * worker lock. If the task is not known to LU,
4816                  * completed/aborted, then see if we need to
4817                  * free this task.
4818                  */
4819                 if (old & ITASK_KNOWN_TO_LU) {
4820                         free_it = 0;
4821                         queue_it = 1;
4822                         if (old & ITASK_IN_WORKER_QUEUE) {
4823                                 cmn_err(CE_PANIC, "status completion received"
4824                                     " when task is already in worker queue "
4825                                     " task = %p", (void *)task);
4826                         }
4827                         new |= ITASK_IN_WORKER_QUEUE;
4828                 } else {
4829                         queue_it = 0;
4830                 }
4831         } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4832         task->task_completion_status = s;
4833 
4834 
4835         if (queue_it) {
4836                 ASSERT(itask->itask_ncmds < ITASK_MAX_NCMDS);
4837                 itask->itask_cmd_stack[itask->itask_ncmds++] =
4838                     ITASK_CMD_STATUS_DONE;
4839                 itask->itask_worker_next = NULL;
4840                 if (w->worker_task_tail) {
4841                         w->worker_task_tail->itask_worker_next = itask;
4842                 } else {
4843                         w->worker_task_head = itask;
4844                 }
4845                 w->worker_task_tail = itask;
4846                 /* Measure task waitq time */
4847                 itask->itask_waitq_enter_timestamp = gethrtime();
4848                 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4849                         w->worker_max_qdepth_pu = w->worker_queue_depth;
4850                 }
4851                 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4852                         cv_signal(&w->worker_cv);
4853         }
4854         mutex_exit(&w->worker_lock);
4855 
4856         if (free_it) {
4857                 if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4858                     ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4859                     ITASK_BEING_ABORTED)) == 0) {
4860                         stmf_task_free(task);
4861                 } else {
4862                         cmn_err(CE_PANIC, "LU is done with the task but LPORT "
4863                             " is not done, itask %p itask_flags %x",
4864                             (void *)itask, itask->itask_flags);
4865                 }
4866         }
4867 }
4868 
4869 void
4870 stmf_task_lu_done(scsi_task_t *task)
4871 {
4872         stmf_i_scsi_task_t *itask =
4873             (stmf_i_scsi_task_t *)task->task_stmf_private;
4874         stmf_worker_t *w = itask->itask_worker;
4875         uint32_t new, old;
4876 
4877         mutex_enter(&w->worker_lock);
4878         do {
4879                 new = old = itask->itask_flags;
4880                 if (old & ITASK_BEING_ABORTED) {
4881                         mutex_exit(&w->worker_lock);
4882                         return;
4883                 }
4884                 if (old & ITASK_IN_WORKER_QUEUE) {
4885                         cmn_err(CE_PANIC, "task_lu_done received"
4886                             " when task is in worker queue "
4887                             " task = %p", (void *)task);
4888                 }
4889                 new &= ~ITASK_KNOWN_TO_LU;
4890         } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4891 
4892         mutex_exit(&w->worker_lock);
4893 
4894         if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4895             ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4896             ITASK_BEING_ABORTED)) == 0) {
4897                 stmf_task_free(task);
4898         } else {
4899                 cmn_err(CE_PANIC, "stmf_lu_done should be the last stage but "
4900                     " the task is still not done, task = %p", (void *)task);
4901         }
4902 }
4903 
4904 void
4905 stmf_queue_task_for_abort(scsi_task_t *task, stmf_status_t s)
4906 {
4907         stmf_i_scsi_task_t *itask =
4908             (stmf_i_scsi_task_t *)task->task_stmf_private;
4909         stmf_worker_t *w;
4910         uint32_t old, new;
4911 
4912         stmf_task_audit(itask, TE_TASK_ABORT, CMD_OR_IOF_NA, NULL);
4913 
4914         do {
4915                 old = new = itask->itask_flags;
4916                 if ((old & ITASK_BEING_ABORTED) ||
4917                     ((old & (ITASK_KNOWN_TO_TGT_PORT |
4918                     ITASK_KNOWN_TO_LU)) == 0)) {
4919                         return;
4920                 }
4921                 new |= ITASK_BEING_ABORTED;
4922         } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4923         task->task_completion_status = s;
4924         itask->itask_start_time = ddi_get_lbolt();
4925 
4926         if (((w = itask->itask_worker) == NULL) ||
4927             (itask->itask_flags & ITASK_IN_TRANSITION)) {
4928                 return;
4929         }
4930 
4931         /* Queue it and get out */
4932         mutex_enter(&w->worker_lock);
4933         if (itask->itask_flags & ITASK_IN_WORKER_QUEUE) {
4934                 mutex_exit(&w->worker_lock);
4935                 return;
4936         }
4937         atomic_or_32(&itask->itask_flags, ITASK_IN_WORKER_QUEUE);
4938         itask->itask_worker_next = NULL;
4939         if (w->worker_task_tail) {
4940                 w->worker_task_tail->itask_worker_next = itask;
4941         } else {
4942                 w->worker_task_head = itask;
4943         }
4944         w->worker_task_tail = itask;
4945         if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4946                 w->worker_max_qdepth_pu = w->worker_queue_depth;
4947         }
4948         if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4949                 cv_signal(&w->worker_cv);
4950         mutex_exit(&w->worker_lock);
4951 }
4952 
4953 void
4954 stmf_abort(int abort_cmd, scsi_task_t *task, stmf_status_t s, void *arg)
4955 {
4956         stmf_i_scsi_task_t *itask = NULL;
4957         uint32_t old, new, f, rf;
4958 
4959         DTRACE_PROBE2(scsi__task__abort, scsi_task_t *, task,
4960             stmf_status_t, s);
4961 
4962         switch (abort_cmd) {
4963         case STMF_QUEUE_ABORT_LU:
4964                 stmf_task_lu_killall((stmf_lu_t *)arg, task, s);
4965                 return;
4966         case STMF_QUEUE_TASK_ABORT:
4967                 stmf_queue_task_for_abort(task, s);
4968                 return;
4969         case STMF_REQUEUE_TASK_ABORT_LPORT:
4970                 rf = ITASK_TGT_PORT_ABORT_CALLED;
4971                 f = ITASK_KNOWN_TO_TGT_PORT;
4972                 break;
4973         case STMF_REQUEUE_TASK_ABORT_LU:
4974                 rf = ITASK_LU_ABORT_CALLED;
4975                 f = ITASK_KNOWN_TO_LU;
4976                 break;
4977         default:
4978                 return;
4979         }
4980         itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4981         f |= ITASK_BEING_ABORTED | rf;
4982         do {
4983                 old = new = itask->itask_flags;
4984                 if ((old & f) != f) {
4985                         return;
4986                 }
4987                 new &= ~rf;
4988         } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4989 }
4990 
4991 void
4992 stmf_task_lu_aborted(scsi_task_t *task, stmf_status_t s, uint32_t iof)
4993 {
4994         char                     info[STMF_CHANGE_INFO_LEN];
4995         stmf_i_scsi_task_t      *itask = TASK_TO_ITASK(task);
4996         unsigned long long      st;
4997 
4998         stmf_task_audit(itask, TE_TASK_LU_ABORTED, iof, NULL);
4999 
5000         st = s; /* gcc fix */
5001         if ((s != STMF_ABORT_SUCCESS) && (s != STMF_NOT_FOUND)) {
5002                 (void) snprintf(info, sizeof (info),
5003                     "task %p, lu failed to abort ret=%llx", (void *)task, st);
5004         } else if ((iof & STMF_IOF_LU_DONE) == 0) {
5005                 (void) snprintf(info, sizeof (info),
5006                     "Task aborted but LU is not finished, task ="
5007                     "%p, s=%llx, iof=%x", (void *)task, st, iof);
5008         } else {
5009                 /*
5010                  * LU abort successfully
5011                  */
5012                 atomic_and_32(&itask->itask_flags, ~ITASK_KNOWN_TO_LU);
5013                 return;
5014         }
5015 
5016         stmf_abort_task_offline(task, 1, info);
5017 }
5018 
5019 void
5020 stmf_task_lport_aborted(scsi_task_t *task, stmf_status_t s, uint32_t iof)
5021 {
5022         char                    info[STMF_CHANGE_INFO_LEN];
5023         stmf_i_scsi_task_t      *itask = TASK_TO_ITASK(task);
5024         unsigned long long      st;
5025         uint32_t                old, new;
5026 
5027         stmf_task_audit(itask, TE_TASK_LPORT_ABORTED, iof, NULL);
5028 
5029         st = s;
5030         if ((s != STMF_ABORT_SUCCESS) && (s != STMF_NOT_FOUND)) {
5031                 (void) snprintf(info, sizeof (info),
5032                     "task %p, tgt port failed to abort ret=%llx", (void *)task,
5033                     st);
5034         } else if ((iof & STMF_IOF_LPORT_DONE) == 0) {
5035                 (void) snprintf(info, sizeof (info),
5036                     "Task aborted but tgt port is not finished, "
5037                     "task=%p, s=%llx, iof=%x", (void *)task, st, iof);
5038         } else {
5039                 /*
5040                  * LPORT abort successfully
5041                  */
5042                 do {
5043                         old = new = itask->itask_flags;
5044                         if (!(old & ITASK_KNOWN_TO_TGT_PORT))
5045                                 return;
5046                         new &= ~ITASK_KNOWN_TO_TGT_PORT;
5047                 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5048                 return;
5049         }
5050 
5051         stmf_abort_task_offline(task, 0, info);
5052 }
5053 
5054 stmf_status_t
5055 stmf_task_poll_lu(scsi_task_t *task, uint32_t timeout)
5056 {
5057         stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
5058             task->task_stmf_private;
5059         stmf_worker_t *w = itask->itask_worker;
5060         int i;
5061 
5062         ASSERT(itask->itask_flags & ITASK_KNOWN_TO_LU);
5063         mutex_enter(&w->worker_lock);
5064         if (itask->itask_ncmds >= ITASK_MAX_NCMDS) {
5065                 mutex_exit(&w->worker_lock);
5066                 return (STMF_BUSY);
5067         }
5068         for (i = 0; i < itask->itask_ncmds; i++) {
5069                 if (itask->itask_cmd_stack[i] == ITASK_CMD_POLL_LU) {
5070                         mutex_exit(&w->worker_lock);
5071                         return (STMF_SUCCESS);
5072                 }
5073         }
5074         itask->itask_cmd_stack[itask->itask_ncmds++] = ITASK_CMD_POLL_LU;
5075         if (timeout == ITASK_DEFAULT_POLL_TIMEOUT) {
5076                 itask->itask_poll_timeout = ddi_get_lbolt() + 1;
5077         } else {
5078                 clock_t t = drv_usectohz(timeout * 1000);
5079                 if (t == 0)
5080                         t = 1;
5081                 itask->itask_poll_timeout = ddi_get_lbolt() + t;
5082         }
5083         if ((itask->itask_flags & ITASK_IN_WORKER_QUEUE) == 0) {
5084                 itask->itask_worker_next = NULL;
5085                 if (w->worker_task_tail) {
5086                         w->worker_task_tail->itask_worker_next = itask;
5087                 } else {
5088                         w->worker_task_head = itask;
5089                 }
5090                 w->worker_task_tail = itask;
5091                 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
5092                         w->worker_max_qdepth_pu = w->worker_queue_depth;
5093                 }
5094                 atomic_or_32(&itask->itask_flags, ITASK_IN_WORKER_QUEUE);
5095                 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
5096                         cv_signal(&w->worker_cv);
5097         }
5098         mutex_exit(&w->worker_lock);
5099         return (STMF_SUCCESS);
5100 }
5101 
5102 stmf_status_t
5103 stmf_task_poll_lport(scsi_task_t *task, uint32_t timeout)
5104 {
5105         stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
5106             task->task_stmf_private;
5107         stmf_worker_t *w = itask->itask_worker;
5108         int i;
5109 
5110         ASSERT(itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT);
5111         mutex_enter(&w->worker_lock);
5112         if (itask->itask_ncmds >= ITASK_MAX_NCMDS) {
5113                 mutex_exit(&w->worker_lock);
5114                 return (STMF_BUSY);
5115         }
5116         for (i = 0; i < itask->itask_ncmds; i++) {
5117                 if (itask->itask_cmd_stack[i] == ITASK_CMD_POLL_LPORT) {
5118                         mutex_exit(&w->worker_lock);
5119                         return (STMF_SUCCESS);
5120                 }
5121         }
5122         itask->itask_cmd_stack[itask->itask_ncmds++] = ITASK_CMD_POLL_LPORT;
5123         if (timeout == ITASK_DEFAULT_POLL_TIMEOUT) {
5124                 itask->itask_poll_timeout = ddi_get_lbolt() + 1;
5125         } else {
5126                 clock_t t = drv_usectohz(timeout * 1000);
5127                 if (t == 0)
5128                         t = 1;
5129                 itask->itask_poll_timeout = ddi_get_lbolt() + t;
5130         }
5131         if ((itask->itask_flags & ITASK_IN_WORKER_QUEUE) == 0) {
5132                 itask->itask_worker_next = NULL;
5133                 if (w->worker_task_tail) {
5134                         w->worker_task_tail->itask_worker_next = itask;
5135                 } else {
5136                         w->worker_task_head = itask;
5137                 }
5138                 w->worker_task_tail = itask;
5139                 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
5140                         w->worker_max_qdepth_pu = w->worker_queue_depth;
5141                 }
5142                 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
5143                         cv_signal(&w->worker_cv);
5144         }
5145         mutex_exit(&w->worker_lock);
5146         return (STMF_SUCCESS);
5147 }
5148 
5149 void
5150 stmf_do_task_abort(scsi_task_t *task)
5151 {
5152         stmf_i_scsi_task_t      *itask = TASK_TO_ITASK(task);
5153         stmf_lu_t               *lu;
5154         stmf_local_port_t       *lport;
5155         unsigned long long       ret;
5156         uint32_t                 old, new;
5157         uint8_t                  call_lu_abort, call_port_abort;
5158         char                     info[STMF_CHANGE_INFO_LEN];
5159 
5160         lu = task->task_lu;
5161         lport = task->task_lport;
5162         do {
5163                 old = new = itask->itask_flags;
5164                 if ((old & (ITASK_KNOWN_TO_LU | ITASK_LU_ABORT_CALLED)) ==
5165                     ITASK_KNOWN_TO_LU) {
5166                         new |= ITASK_LU_ABORT_CALLED;
5167                         call_lu_abort = 1;
5168                 } else {
5169                         call_lu_abort = 0;
5170                 }
5171         } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5172 
5173         if (call_lu_abort) {
5174                 if ((itask->itask_flags & ITASK_DEFAULT_HANDLING) == 0) {
5175                         ret = lu->lu_abort(lu, STMF_LU_ABORT_TASK, task, 0);
5176                 } else {
5177                         ret = dlun0->lu_abort(lu, STMF_LU_ABORT_TASK, task, 0);
5178                 }
5179                 if ((ret == STMF_ABORT_SUCCESS) || (ret == STMF_NOT_FOUND)) {
5180                         stmf_task_lu_aborted(task, ret, STMF_IOF_LU_DONE);
5181                 } else if (ret == STMF_BUSY) {
5182                         atomic_and_32(&itask->itask_flags,
5183                             ~ITASK_LU_ABORT_CALLED);
5184                 } else if (ret != STMF_SUCCESS) {
5185                         (void) snprintf(info, sizeof (info),
5186                             "Abort failed by LU %p, ret %llx", (void *)lu, ret);
5187                         stmf_abort_task_offline(task, 1, info);
5188                 }
5189         } else if (itask->itask_flags & ITASK_KNOWN_TO_LU) {
5190                 if (ddi_get_lbolt() > (itask->itask_start_time +
5191                     STMF_SEC2TICK(lu->lu_abort_timeout?
5192                     lu->lu_abort_timeout : ITASK_DEFAULT_ABORT_TIMEOUT))) {
5193                         (void) snprintf(info, sizeof (info),
5194                             "lu abort timed out");
5195                         stmf_abort_task_offline(itask->itask_task, 1, info);
5196                 }
5197         }
5198 
5199         do {
5200                 old = new = itask->itask_flags;
5201                 if ((old & (ITASK_KNOWN_TO_TGT_PORT |
5202                     ITASK_TGT_PORT_ABORT_CALLED)) == ITASK_KNOWN_TO_TGT_PORT) {
5203                         new |= ITASK_TGT_PORT_ABORT_CALLED;
5204                         call_port_abort = 1;
5205                 } else {
5206                         call_port_abort = 0;
5207                 }
5208         } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5209         if (call_port_abort) {
5210                 ret = lport->lport_abort(lport, STMF_LPORT_ABORT_TASK, task, 0);
5211                 if ((ret == STMF_ABORT_SUCCESS) || (ret == STMF_NOT_FOUND)) {
5212                         stmf_task_lport_aborted(task, ret, STMF_IOF_LPORT_DONE);
5213                 } else if (ret == STMF_BUSY) {
5214                         atomic_and_32(&itask->itask_flags,
5215                             ~ITASK_TGT_PORT_ABORT_CALLED);
5216                 } else if (ret != STMF_SUCCESS) {
5217                         (void) snprintf(info, sizeof (info),
5218                             "Abort failed by tgt port %p ret %llx",
5219                             (void *)lport, ret);
5220                         stmf_abort_task_offline(task, 0, info);
5221                 }
5222         } else if (itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT) {
5223                 if (ddi_get_lbolt() > (itask->itask_start_time +
5224                     STMF_SEC2TICK(lport->lport_abort_timeout?
5225                     lport->lport_abort_timeout :
5226                     ITASK_DEFAULT_ABORT_TIMEOUT))) {
5227                         (void) snprintf(info, sizeof (info),
5228                             "lport abort timed out");
5229                         stmf_abort_task_offline(itask->itask_task, 0, info);
5230                 }
5231         }
5232 }
5233 
5234 stmf_status_t
5235 stmf_ctl(int cmd, void *obj, void *arg)
5236 {
5237         stmf_status_t                   ret;
5238         stmf_i_lu_t                     *ilu;
5239         stmf_i_local_port_t             *ilport;
5240         stmf_state_change_info_t        *ssci = (stmf_state_change_info_t *)arg;
5241 
5242         mutex_enter(&stmf_state.stmf_lock);
5243         ret = STMF_INVALID_ARG;
5244         if (cmd & STMF_CMD_LU_OP) {
5245                 ilu = stmf_lookup_lu((stmf_lu_t *)obj);
5246                 if (ilu == NULL) {
5247                         goto stmf_ctl_lock_exit;
5248                 }
5249                 DTRACE_PROBE3(lu__state__change,
5250                     stmf_lu_t *, ilu->ilu_lu,
5251                     int, cmd, stmf_state_change_info_t *, ssci);
5252         } else if (cmd & STMF_CMD_LPORT_OP) {
5253                 ilport = stmf_lookup_lport((stmf_local_port_t *)obj);
5254                 if (ilport == NULL) {
5255                         goto stmf_ctl_lock_exit;
5256                 }
5257                 DTRACE_PROBE3(lport__state__change,
5258                     stmf_local_port_t *, ilport->ilport_lport,
5259                     int, cmd, stmf_state_change_info_t *, ssci);
5260         } else {
5261                 goto stmf_ctl_lock_exit;
5262         }
5263 
5264         switch (cmd) {
5265         case STMF_CMD_LU_ONLINE:
5266                 switch (ilu->ilu_state) {
5267                         case STMF_STATE_OFFLINE:
5268                                 ret = STMF_SUCCESS;
5269                                 break;
5270                         case STMF_STATE_ONLINE:
5271                         case STMF_STATE_ONLINING:
5272                                 ret = STMF_ALREADY;
5273                                 break;
5274                         case STMF_STATE_OFFLINING:
5275                                 ret = STMF_BUSY;
5276                                 break;
5277                         default:
5278                                 ret = STMF_BADSTATE;
5279                                 break;
5280                 }
5281                 if (ret != STMF_SUCCESS)
5282                         goto stmf_ctl_lock_exit;
5283 
5284                 ilu->ilu_state = STMF_STATE_ONLINING;
5285                 mutex_exit(&stmf_state.stmf_lock);
5286                 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5287                 break;
5288 
5289         case STMF_CMD_LU_ONLINE_COMPLETE:
5290                 if (ilu->ilu_state != STMF_STATE_ONLINING) {
5291                         ret = STMF_BADSTATE;
5292                         goto stmf_ctl_lock_exit;
5293                 }
5294                 if (((stmf_change_status_t *)arg)->st_completion_status ==
5295                     STMF_SUCCESS) {
5296                         ilu->ilu_state = STMF_STATE_ONLINE;
5297                         mutex_exit(&stmf_state.stmf_lock);
5298                         ((stmf_lu_t *)obj)->lu_ctl((stmf_lu_t *)obj,
5299                             STMF_ACK_LU_ONLINE_COMPLETE, arg);
5300                         mutex_enter(&stmf_state.stmf_lock);
5301                         stmf_add_lu_to_active_sessions((stmf_lu_t *)obj);
5302                 } else {
5303                         /* XXX: should throw a meesage an record more data */
5304                         ilu->ilu_state = STMF_STATE_OFFLINE;
5305                 }
5306                 ret = STMF_SUCCESS;
5307                 goto stmf_ctl_lock_exit;
5308 
5309         case STMF_CMD_LU_OFFLINE:
5310                 switch (ilu->ilu_state) {
5311                         case STMF_STATE_ONLINE:
5312                                 ret = STMF_SUCCESS;
5313                                 break;
5314                         case STMF_STATE_OFFLINE:
5315                         case STMF_STATE_OFFLINING:
5316                                 ret = STMF_ALREADY;
5317                                 break;
5318                         case STMF_STATE_ONLINING:
5319                                 ret = STMF_BUSY;
5320                                 break;
5321                         default:
5322                                 ret = STMF_BADSTATE;
5323                                 break;
5324                 }
5325                 if (ret != STMF_SUCCESS)
5326                         goto stmf_ctl_lock_exit;
5327                 ilu->ilu_state = STMF_STATE_OFFLINING;
5328                 mutex_exit(&stmf_state.stmf_lock);
5329                 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5330                 break;
5331 
5332         case STMF_CMD_LU_OFFLINE_COMPLETE:
5333                 if (ilu->ilu_state != STMF_STATE_OFFLINING) {
5334                         ret = STMF_BADSTATE;
5335                         goto stmf_ctl_lock_exit;
5336                 }
5337                 if (((stmf_change_status_t *)arg)->st_completion_status ==
5338                     STMF_SUCCESS) {
5339                         ilu->ilu_state = STMF_STATE_OFFLINE;
5340                         mutex_exit(&stmf_state.stmf_lock);
5341                         ((stmf_lu_t *)obj)->lu_ctl((stmf_lu_t *)obj,
5342                             STMF_ACK_LU_OFFLINE_COMPLETE, arg);
5343                         mutex_enter(&stmf_state.stmf_lock);
5344                 } else {
5345                         ilu->ilu_state = STMF_STATE_ONLINE;
5346                         stmf_add_lu_to_active_sessions((stmf_lu_t *)obj);
5347                 }
5348                 mutex_exit(&stmf_state.stmf_lock);
5349                 break;
5350 
5351         /*
5352          * LPORT_ONLINE/OFFLINE has nothing to do with link offline/online.
5353          * It's related with hardware disable/enable.
5354          */
5355         case STMF_CMD_LPORT_ONLINE:
5356                 switch (ilport->ilport_state) {
5357                         case STMF_STATE_OFFLINE:
5358                                 ret = STMF_SUCCESS;
5359                                 break;
5360                         case STMF_STATE_ONLINE:
5361                         case STMF_STATE_ONLINING:
5362                                 ret = STMF_ALREADY;
5363                                 break;
5364                         case STMF_STATE_OFFLINING:
5365                                 ret = STMF_BUSY;
5366                                 break;
5367                         default:
5368                                 ret = STMF_BADSTATE;
5369                                 break;
5370                 }
5371                 if (ret != STMF_SUCCESS)
5372                         goto stmf_ctl_lock_exit;
5373 
5374                 /*
5375                  * Only user request can recover the port from the
5376                  * FORCED_OFFLINE state
5377                  */
5378                 if (ilport->ilport_flags & ILPORT_FORCED_OFFLINE) {
5379                         if (!(ssci->st_rflags & STMF_RFLAG_USER_REQUEST)) {
5380                                 ret = STMF_FAILURE;
5381                                 goto stmf_ctl_lock_exit;
5382                         }
5383                 }
5384 
5385                 /*
5386                  * Avoid too frequent request to online
5387                  */
5388                 if (ssci->st_rflags & STMF_RFLAG_USER_REQUEST) {
5389                         ilport->ilport_online_times = 0;
5390                         ilport->ilport_avg_interval = 0;
5391                 }
5392                 if ((ilport->ilport_avg_interval < STMF_AVG_ONLINE_INTERVAL) &&
5393                     (ilport->ilport_online_times >= 4)) {
5394                         ret = STMF_FAILURE;
5395                         ilport->ilport_flags |= ILPORT_FORCED_OFFLINE;
5396                         stmf_trace(NULL, "stmf_ctl: too frequent request to "
5397                             "online the port");
5398                         cmn_err(CE_WARN, "stmf_ctl: too frequent request to "
5399                             "online the port, set FORCED_OFFLINE now");
5400                         goto stmf_ctl_lock_exit;
5401                 }
5402                 if (ilport->ilport_online_times > 0) {
5403                         if (ilport->ilport_online_times == 1) {
5404                                 ilport->ilport_avg_interval = ddi_get_lbolt() -
5405                                     ilport->ilport_last_online_clock;
5406                         } else {
5407                                 ilport->ilport_avg_interval =
5408                                     (ilport->ilport_avg_interval +
5409                                     ddi_get_lbolt() -
5410                                     ilport->ilport_last_online_clock) >> 1;
5411                         }
5412                 }
5413                 ilport->ilport_last_online_clock = ddi_get_lbolt();
5414                 ilport->ilport_online_times++;
5415 
5416                 /*
5417                  * Submit online service request
5418                  */
5419                 ilport->ilport_flags &= ~ILPORT_FORCED_OFFLINE;
5420                 ilport->ilport_state = STMF_STATE_ONLINING;
5421                 mutex_exit(&stmf_state.stmf_lock);
5422                 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5423                 break;
5424 
5425         case STMF_CMD_LPORT_ONLINE_COMPLETE:
5426                 if (ilport->ilport_state != STMF_STATE_ONLINING) {
5427                         ret = STMF_BADSTATE;
5428                         goto stmf_ctl_lock_exit;
5429                 }
5430                 if (((stmf_change_status_t *)arg)->st_completion_status ==
5431                     STMF_SUCCESS) {
5432                         ilport->ilport_state = STMF_STATE_ONLINE;
5433                         mutex_exit(&stmf_state.stmf_lock);
5434                         ((stmf_local_port_t *)obj)->lport_ctl(
5435                             (stmf_local_port_t *)obj,
5436                             STMF_ACK_LPORT_ONLINE_COMPLETE, arg);
5437                         mutex_enter(&stmf_state.stmf_lock);
5438                 } else {
5439                         ilport->ilport_state = STMF_STATE_OFFLINE;
5440                 }
5441                 ret = STMF_SUCCESS;
5442                 goto stmf_ctl_lock_exit;
5443 
5444         case STMF_CMD_LPORT_OFFLINE:
5445                 switch (ilport->ilport_state) {
5446                         case STMF_STATE_ONLINE:
5447                                 ret = STMF_SUCCESS;
5448                                 break;
5449                         case STMF_STATE_OFFLINE:
5450                         case STMF_STATE_OFFLINING:
5451                                 ret = STMF_ALREADY;
5452                                 break;
5453                         case STMF_STATE_ONLINING:
5454                                 ret = STMF_BUSY;
5455                                 break;
5456                         default:
5457                                 ret = STMF_BADSTATE;
5458                                 break;
5459                 }
5460                 if (ret != STMF_SUCCESS)
5461                         goto stmf_ctl_lock_exit;
5462 
5463                 ilport->ilport_state = STMF_STATE_OFFLINING;
5464                 mutex_exit(&stmf_state.stmf_lock);
5465                 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5466                 break;
5467 
5468         case STMF_CMD_LPORT_OFFLINE_COMPLETE:
5469                 if (ilport->ilport_state != STMF_STATE_OFFLINING) {
5470                         ret = STMF_BADSTATE;
5471                         goto stmf_ctl_lock_exit;
5472                 }
5473                 if (((stmf_change_status_t *)arg)->st_completion_status ==
5474                     STMF_SUCCESS) {
5475                         ilport->ilport_state = STMF_STATE_OFFLINE;
5476                         mutex_exit(&stmf_state.stmf_lock);
5477                         ((stmf_local_port_t *)obj)->lport_ctl(
5478                             (stmf_local_port_t *)obj,
5479                             STMF_ACK_LPORT_OFFLINE_COMPLETE, arg);
5480                         mutex_enter(&stmf_state.stmf_lock);
5481                 } else {
5482                         ilport->ilport_state = STMF_STATE_ONLINE;
5483                 }
5484                 mutex_exit(&stmf_state.stmf_lock);
5485                 break;
5486 
5487         default:
5488                 cmn_err(CE_WARN, "Invalid ctl cmd received %x", cmd);
5489                 ret = STMF_INVALID_ARG;
5490                 goto stmf_ctl_lock_exit;
5491         }
5492 
5493         return (STMF_SUCCESS);
5494 
5495 stmf_ctl_lock_exit:;
5496         mutex_exit(&stmf_state.stmf_lock);
5497         return (ret);
5498 }
5499 
5500 /* ARGSUSED */
5501 stmf_status_t
5502 stmf_info_impl(uint32_t cmd, void *arg1, void *arg2, uint8_t *buf,
5503                                                 uint32_t *bufsizep)
5504 {
5505         return (STMF_NOT_SUPPORTED);
5506 }
5507 
5508 /* ARGSUSED */
5509 stmf_status_t
5510 stmf_info(uint32_t cmd, void *arg1, void *arg2, uint8_t *buf,
5511                                                 uint32_t *bufsizep)
5512 {
5513         uint32_t cl = SI_GET_CLASS(cmd);
5514 
5515         if (cl == SI_STMF) {
5516                 return (stmf_info_impl(cmd, arg1, arg2, buf, bufsizep));
5517         }
5518         if (cl == SI_LPORT) {
5519                 return (((stmf_local_port_t *)arg1)->lport_info(cmd, arg1,
5520                     arg2, buf, bufsizep));
5521         } else if (cl == SI_LU) {
5522                 return (((stmf_lu_t *)arg1)->lu_info(cmd, arg1, arg2, buf,
5523                     bufsizep));
5524         }
5525 
5526         return (STMF_NOT_SUPPORTED);
5527 }
5528 
5529 /*
5530  * Used by port providers. pwwn is 8 byte wwn, sdid is the devid used by
5531  * stmf to register local ports. The ident should have 20 bytes in buffer
5532  * space to convert the wwn to "wwn.xxxxxxxxxxxxxxxx" string.
5533  */
5534 void
5535 stmf_wwn_to_devid_desc(scsi_devid_desc_t *sdid, uint8_t *wwn,
5536     uint8_t protocol_id)
5537 {
5538         char wwn_str[20+1];
5539 
5540         sdid->protocol_id = protocol_id;
5541         sdid->piv = 1;
5542         sdid->code_set = CODE_SET_ASCII;
5543         sdid->association = ID_IS_TARGET_PORT;
5544         sdid->ident_length = 20;
5545         /* Convert wwn value to "wwn.XXXXXXXXXXXXXXXX" format */
5546         (void) snprintf(wwn_str, sizeof (wwn_str),
5547             "wwn.%02X%02X%02X%02X%02X%02X%02X%02X",
5548             wwn[0], wwn[1], wwn[2], wwn[3], wwn[4], wwn[5], wwn[6], wwn[7]);
5549         bcopy(wwn_str, (char *)sdid->ident, 20);
5550 }
5551 
5552 
5553 stmf_xfer_data_t *
5554 stmf_prepare_tpgs_data(uint8_t ilu_alua)
5555 {
5556         stmf_xfer_data_t *xd;
5557         stmf_i_local_port_t *ilport;
5558         uint8_t *p;
5559         uint32_t sz, asz, nports = 0, nports_standby = 0;
5560 
5561         mutex_enter(&stmf_state.stmf_lock);
5562         /* check if any ports are standby and create second group */
5563         for (ilport = stmf_state.stmf_ilportlist; ilport;
5564             ilport = ilport->ilport_next) {
5565                 if (ilport->ilport_standby == 1) {
5566                         nports_standby++;
5567                 } else {
5568                         nports++;
5569                 }
5570         }
5571 
5572         /* The spec only allows for 255 ports to be reported per group */
5573         nports = min(nports, 255);
5574         nports_standby = min(nports_standby, 255);
5575         sz = (nports * 4) + 12;
5576         if (nports_standby && ilu_alua) {
5577                 sz += (nports_standby * 4) + 8;
5578         }
5579         asz = sz + sizeof (*xd) - 4;
5580         xd = (stmf_xfer_data_t *)kmem_zalloc(asz, KM_NOSLEEP);
5581         if (xd == NULL) {
5582                 mutex_exit(&stmf_state.stmf_lock);
5583                 return (NULL);
5584         }
5585         xd->alloc_size = asz;
5586         xd->size_left = sz;
5587 
5588         p = xd->buf;
5589 
5590         *((uint32_t *)p) = BE_32(sz - 4);
5591         p += 4;
5592         p[0] = 0x80;    /* PREF */
5593         p[1] = 5;       /* AO_SUP, S_SUP */
5594         if (stmf_state.stmf_alua_node == 1) {
5595                 p[3] = 1;       /* Group 1 */
5596         } else {
5597                 p[3] = 0;       /* Group 0 */
5598         }
5599         p[7] = nports & 0xff;
5600         p += 8;
5601         for (ilport = stmf_state.stmf_ilportlist; ilport;
5602             ilport = ilport->ilport_next) {
5603                 if (ilport->ilport_standby == 1) {
5604                         continue;
5605                 }
5606                 ((uint16_t *)p)[1] = BE_16(ilport->ilport_rtpid);
5607                 p += 4;
5608         }
5609         if (nports_standby && ilu_alua) {
5610                 p[0] = 0x02;    /* Non PREF, Standby */
5611                 p[1] = 5;       /* AO_SUP, S_SUP */
5612                 if (stmf_state.stmf_alua_node == 1) {
5613                         p[3] = 0;       /* Group 0 */
5614                 } else {
5615                         p[3] = 1;       /* Group 1 */
5616                 }
5617                 p[7] = nports_standby & 0xff;
5618                 p += 8;
5619                 for (ilport = stmf_state.stmf_ilportlist; ilport;
5620                     ilport = ilport->ilport_next) {
5621                         if (ilport->ilport_standby == 0) {
5622                                 continue;
5623                         }
5624                         ((uint16_t *)p)[1] = BE_16(ilport->ilport_rtpid);
5625                         p += 4;
5626                 }
5627         }
5628 
5629         mutex_exit(&stmf_state.stmf_lock);
5630 
5631         return (xd);
5632 }
5633 
5634 struct scsi_devid_desc *
5635 stmf_scsilib_get_devid_desc(uint16_t rtpid)
5636 {
5637         scsi_devid_desc_t *devid = NULL;
5638         stmf_i_local_port_t *ilport;
5639 
5640         mutex_enter(&stmf_state.stmf_lock);
5641 
5642         for (ilport = stmf_state.stmf_ilportlist; ilport;
5643             ilport = ilport->ilport_next) {
5644                 if (ilport->ilport_rtpid == rtpid) {
5645                         scsi_devid_desc_t *id = ilport->ilport_lport->lport_id;
5646                         uint32_t id_sz = sizeof (scsi_devid_desc_t) +
5647                             id->ident_length;
5648                         devid = (scsi_devid_desc_t *)kmem_zalloc(id_sz,
5649                             KM_NOSLEEP);
5650                         if (devid != NULL) {
5651                                 bcopy(id, devid, id_sz);
5652                         }
5653                         break;
5654                 }
5655         }
5656 
5657         mutex_exit(&stmf_state.stmf_lock);
5658         return (devid);
5659 }
5660 
5661 uint16_t
5662 stmf_scsilib_get_lport_rtid(struct scsi_devid_desc *devid)
5663 {
5664         stmf_i_local_port_t     *ilport;
5665         scsi_devid_desc_t       *id;
5666         uint16_t                rtpid = 0;
5667 
5668         mutex_enter(&stmf_state.stmf_lock);
5669         for (ilport = stmf_state.stmf_ilportlist; ilport;
5670             ilport = ilport->ilport_next) {
5671                 id = ilport->ilport_lport->lport_id;
5672                 if ((devid->ident_length == id->ident_length) &&
5673                     (memcmp(devid->ident, id->ident, id->ident_length) == 0)) {
5674                         rtpid = ilport->ilport_rtpid;
5675                         break;
5676                 }
5677         }
5678         mutex_exit(&stmf_state.stmf_lock);
5679         return (rtpid);
5680 }
5681 
5682 static uint16_t stmf_lu_id_gen_number = 0;
5683 
5684 stmf_status_t
5685 stmf_scsilib_uniq_lu_id(uint32_t company_id, scsi_devid_desc_t *lu_id)
5686 {
5687         return (stmf_scsilib_uniq_lu_id2(company_id, 0, lu_id));
5688 }
5689 
5690 stmf_status_t
5691 stmf_scsilib_uniq_lu_id2(uint32_t company_id, uint32_t host_id,
5692     scsi_devid_desc_t *lu_id)
5693 {
5694         uint8_t *p;
5695         struct timeval32 timestamp32;
5696         uint32_t *t = (uint32_t *)&timestamp32;
5697         struct ether_addr mac;
5698         uint8_t *e = (uint8_t *)&mac;
5699         int hid = (int)host_id;
5700         uint16_t gen_number;
5701 
5702         if (company_id == COMPANY_ID_NONE)
5703                 company_id = COMPANY_ID_SUN;
5704 
5705         if (lu_id->ident_length != 0x10)
5706                 return (STMF_INVALID_ARG);
5707 
5708         p = (uint8_t *)lu_id;
5709 
5710         gen_number = atomic_inc_16_nv(&stmf_lu_id_gen_number);
5711 
5712         p[0] = 0xf1; p[1] = 3; p[2] = 0; p[3] = 0x10;
5713         p[4] = ((company_id >> 20) & 0xf) | 0x60;
5714         p[5] = (company_id >> 12) & 0xff;
5715         p[6] = (company_id >> 4) & 0xff;
5716         p[7] = (company_id << 4) & 0xf0;
5717         if (hid == 0 && !localetheraddr((struct ether_addr *)NULL, &mac)) {
5718                 hid = BE_32((int)zone_get_hostid(NULL));
5719         }
5720         if (hid != 0) {
5721                 e[0] = (hid >> 24) & 0xff;
5722                 e[1] = (hid >> 16) & 0xff;
5723                 e[2] = (hid >> 8) & 0xff;
5724                 e[3] = hid & 0xff;
5725                 e[4] = e[5] = 0;
5726         }
5727         bcopy(e, p+8, 6);
5728         uniqtime32(&timestamp32);
5729         *t = BE_32(*t);
5730         bcopy(t, p+14, 4);
5731         p[18] = (gen_number >> 8) & 0xff;
5732         p[19] = gen_number & 0xff;
5733 
5734         return (STMF_SUCCESS);
5735 }
5736 
5737 /*
5738  * saa is sense key, ASC, ASCQ
5739  */
5740 void
5741 stmf_scsilib_send_status(scsi_task_t *task, uint8_t st, uint32_t saa)
5742 {
5743         uint8_t sd[18];
5744         task->task_scsi_status = st;
5745         if (st == 2) {
5746                 bzero(sd, 18);
5747                 sd[0] = 0x70;
5748                 sd[2] = (saa >> 16) & 0xf;
5749                 sd[7] = 10;
5750                 sd[12] = (saa >> 8) & 0xff;
5751                 sd[13] = saa & 0xff;
5752                 task->task_sense_data = sd;
5753                 task->task_sense_length = 18;
5754         } else {
5755                 task->task_sense_data = NULL;
5756                 task->task_sense_length = 0;
5757         }
5758         (void) stmf_send_scsi_status(task, STMF_IOF_LU_DONE);
5759 }
5760 
5761 uint32_t
5762 stmf_scsilib_prepare_vpd_page83(scsi_task_t *task, uint8_t *page,
5763     uint32_t page_len, uint8_t byte0, uint32_t vpd_mask)
5764 {
5765         uint8_t         *p = NULL;
5766         uint8_t         small_buf[32];
5767         uint32_t        sz = 0;
5768         uint32_t        n = 4;
5769         uint32_t        m = 0;
5770         uint32_t        last_bit = 0;
5771 
5772         if (page_len < 4)
5773                 return (0);
5774         if (page_len > 65535)
5775                 page_len = 65535;
5776 
5777         page[0] = byte0;
5778         page[1] = 0x83;
5779 
5780         /* CONSTCOND */
5781         while (1) {
5782                 m += sz;
5783                 if (sz && (page_len > n)) {
5784                         uint32_t copysz;
5785                         copysz = page_len > (n + sz) ? sz : page_len - n;
5786                         bcopy(p, page + n, copysz);
5787                         n += copysz;
5788                 }
5789                 vpd_mask &= ~last_bit;
5790                 if (vpd_mask == 0)
5791                         break;
5792 
5793                 if (vpd_mask & STMF_VPD_LU_ID) {
5794                         last_bit = STMF_VPD_LU_ID;
5795                         sz = task->task_lu->lu_id->ident_length + 4;
5796                         p = (uint8_t *)task->task_lu->lu_id;
5797                         continue;
5798                 } else if (vpd_mask & STMF_VPD_TARGET_ID) {
5799                         last_bit = STMF_VPD_TARGET_ID;
5800                         sz = task->task_lport->lport_id->ident_length + 4;
5801                         p = (uint8_t *)task->task_lport->lport_id;
5802                         continue;
5803                 } else if (vpd_mask & STMF_VPD_TP_GROUP) {
5804                         stmf_i_local_port_t *ilport;
5805                         last_bit = STMF_VPD_TP_GROUP;
5806                         p = small_buf;
5807                         bzero(p, 8);
5808                         p[0] = 1;
5809                         p[1] = 0x15;
5810                         p[3] = 4;
5811                         ilport = (stmf_i_local_port_t *)
5812                             task->task_lport->lport_stmf_private;
5813                         /*
5814                          * If we're in alua mode, group 1 contains all alua
5815                          * participating ports and all standby ports
5816                          * > 255. Otherwise, if we're in alua mode, any local
5817                          * ports (non standby/pppt) are also in group 1 if the
5818                          * alua node is 1. Otherwise the group is 0.
5819                          */
5820                         if ((stmf_state.stmf_alua_state &&
5821                             (ilport->ilport_alua || ilport->ilport_standby) &&
5822                             ilport->ilport_rtpid > 255) ||
5823                             (stmf_state.stmf_alua_node == 1 &&
5824                             ilport->ilport_standby != 1)) {
5825                                 p[7] = 1;       /* Group 1 */
5826                         }
5827                         sz = 8;
5828                         continue;
5829                 } else if (vpd_mask & STMF_VPD_RELATIVE_TP_ID) {
5830                         stmf_i_local_port_t *ilport;
5831 
5832                         last_bit = STMF_VPD_RELATIVE_TP_ID;
5833                         p = small_buf;
5834                         bzero(p, 8);
5835                         p[0] = 1;
5836                         p[1] = 0x14;
5837                         p[3] = 4;
5838                         ilport = (stmf_i_local_port_t *)
5839                             task->task_lport->lport_stmf_private;
5840                         p[6] = (ilport->ilport_rtpid >> 8) & 0xff;
5841                         p[7] = ilport->ilport_rtpid & 0xff;
5842                         sz = 8;
5843                         continue;
5844                 } else {
5845                         cmn_err(CE_WARN, "Invalid vpd_mask");
5846                         break;
5847                 }
5848         }
5849 
5850         page[2] = (m >> 8) & 0xff;
5851         page[3] = m & 0xff;
5852 
5853         return (n);
5854 }
5855 
5856 void
5857 stmf_scsilib_handle_report_tpgs(scsi_task_t *task, stmf_data_buf_t *dbuf)
5858 {
5859         stmf_i_scsi_task_t *itask =
5860             (stmf_i_scsi_task_t *)task->task_stmf_private;
5861         stmf_i_lu_t *ilu =
5862             (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
5863         stmf_xfer_data_t *xd;
5864         uint32_t sz, minsz;
5865 
5866         itask->itask_flags |= ITASK_DEFAULT_HANDLING;
5867         task->task_cmd_xfer_length =
5868             ((((uint32_t)task->task_cdb[6]) << 24) |
5869             (((uint32_t)task->task_cdb[7]) << 16) |
5870             (((uint32_t)task->task_cdb[8]) << 8) |
5871             ((uint32_t)task->task_cdb[9]));
5872 
5873         if (task->task_additional_flags &
5874             TASK_AF_NO_EXPECTED_XFER_LENGTH) {
5875                 task->task_expected_xfer_length =
5876                     task->task_cmd_xfer_length;
5877         }
5878 
5879         if (task->task_cmd_xfer_length == 0) {
5880                 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
5881                 return;
5882         }
5883         if (task->task_cmd_xfer_length < 4) {
5884                 stmf_scsilib_send_status(task, STATUS_CHECK,
5885                     STMF_SAA_INVALID_FIELD_IN_CDB);
5886                 return;
5887         }
5888 
5889         sz = min(task->task_expected_xfer_length,
5890             task->task_cmd_xfer_length);
5891 
5892         xd = stmf_prepare_tpgs_data(ilu->ilu_alua);
5893 
5894         if (xd == NULL) {
5895                 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
5896                     STMF_ALLOC_FAILURE, NULL);
5897                 return;
5898         }
5899 
5900         sz = min(sz, xd->size_left);
5901         xd->size_left = sz;
5902         minsz = min(512, sz);
5903 
5904         if (dbuf == NULL)
5905                 dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
5906         if (dbuf == NULL) {
5907                 kmem_free(xd, xd->alloc_size);
5908                 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
5909                     STMF_ALLOC_FAILURE, NULL);
5910                 return;
5911         }
5912         dbuf->db_lu_private = xd;
5913         stmf_xd_to_dbuf(dbuf, 1);
5914 
5915         dbuf->db_flags = DB_DIRECTION_TO_RPORT;
5916         (void) stmf_xfer_data(task, dbuf, 0);
5917 
5918 }
5919 
5920 void
5921 stmf_scsilib_handle_task_mgmt(scsi_task_t *task)
5922 {
5923 
5924         switch (task->task_mgmt_function) {
5925         /*
5926          * For now we will abort all I/Os on the LU in case of ABORT_TASK_SET
5927          * and ABORT_TASK. But unlike LUN_RESET we will not reset LU state
5928          * in these cases. This needs to be changed to abort only the required
5929          * set.
5930          */
5931         case TM_ABORT_TASK:
5932         case TM_ABORT_TASK_SET:
5933         case TM_CLEAR_TASK_SET:
5934         case TM_LUN_RESET:
5935                 stmf_handle_lun_reset(task);
5936                 /* issue the reset to the proxy node as well */
5937                 if (stmf_state.stmf_alua_state == 1) {
5938                         (void) stmf_proxy_scsi_cmd(task, NULL);
5939                 }
5940                 return;
5941         case TM_TARGET_RESET:
5942         case TM_TARGET_COLD_RESET:
5943         case TM_TARGET_WARM_RESET:
5944                 stmf_handle_target_reset(task);
5945                 return;
5946         default:
5947                 /* We dont support this task mgmt function */
5948                 stmf_scsilib_send_status(task, STATUS_CHECK,
5949                     STMF_SAA_INVALID_FIELD_IN_CMD_IU);
5950                 return;
5951         }
5952 }
5953 
5954 void
5955 stmf_handle_lun_reset(scsi_task_t *task)
5956 {
5957         stmf_i_scsi_task_t *itask;
5958         stmf_i_lu_t *ilu;
5959 
5960         itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
5961         ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
5962 
5963         /*
5964          * To sync with target reset, grab this lock. The LU is not going
5965          * anywhere as there is atleast one task pending (this task).
5966          */
5967         mutex_enter(&stmf_state.stmf_lock);
5968 
5969         if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
5970                 mutex_exit(&stmf_state.stmf_lock);
5971                 stmf_scsilib_send_status(task, STATUS_CHECK,
5972                     STMF_SAA_OPERATION_IN_PROGRESS);
5973                 return;
5974         }
5975         atomic_or_32(&ilu->ilu_flags, ILU_RESET_ACTIVE);
5976         mutex_exit(&stmf_state.stmf_lock);
5977 
5978         /*
5979          * Mark this task as the one causing LU reset so that we know who
5980          * was responsible for setting the ILU_RESET_ACTIVE. In case this
5981          * task itself gets aborted, we will clear ILU_RESET_ACTIVE.
5982          */
5983         itask->itask_flags |= ITASK_DEFAULT_HANDLING | ITASK_CAUSING_LU_RESET;
5984 
5985         /* Initiatiate abort on all commands on this LU except this one */
5986         stmf_abort(STMF_QUEUE_ABORT_LU, task, STMF_ABORTED, task->task_lu);
5987 
5988         /* Start polling on this task */
5989         if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
5990             != STMF_SUCCESS) {
5991                 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ALLOC_FAILURE,
5992                     NULL);
5993                 return;
5994         }
5995 }
5996 
5997 void
5998 stmf_handle_target_reset(scsi_task_t *task)
5999 {
6000         stmf_i_scsi_task_t *itask;
6001         stmf_i_lu_t *ilu;
6002         stmf_i_scsi_session_t *iss;
6003         stmf_lun_map_t *lm;
6004         stmf_lun_map_ent_t *lm_ent;
6005         int i, lf;
6006 
6007         itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
6008         iss = (stmf_i_scsi_session_t *)task->task_session->ss_stmf_private;
6009         ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
6010 
6011         /*
6012          * To sync with LUN reset, grab this lock. The session is not going
6013          * anywhere as there is atleast one task pending (this task).
6014          */
6015         mutex_enter(&stmf_state.stmf_lock);
6016 
6017         /* Grab the session lock as a writer to prevent any changes in it */
6018         rw_enter(iss->iss_lockp, RW_WRITER);
6019 
6020         if (iss->iss_flags & ISS_RESET_ACTIVE) {
6021                 rw_exit(iss->iss_lockp);
6022                 mutex_exit(&stmf_state.stmf_lock);
6023                 stmf_scsilib_send_status(task, STATUS_CHECK,
6024                     STMF_SAA_OPERATION_IN_PROGRESS);
6025                 return;
6026         }
6027         atomic_or_32(&iss->iss_flags, ISS_RESET_ACTIVE);
6028 
6029         /*
6030          * Now go through each LUN in this session and make sure all of them
6031          * can be reset.
6032          */
6033         lm = iss->iss_sm;
6034         for (i = 0, lf = 0; i < lm->lm_nentries; i++) {
6035                 if (lm->lm_plus[i] == NULL)
6036                         continue;
6037                 lf++;
6038                 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6039                 ilu = (stmf_i_lu_t *)(lm_ent->ent_lu->lu_stmf_private);
6040                 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
6041                         atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6042                         rw_exit(iss->iss_lockp);
6043                         mutex_exit(&stmf_state.stmf_lock);
6044                         stmf_scsilib_send_status(task, STATUS_CHECK,
6045                             STMF_SAA_OPERATION_IN_PROGRESS);
6046                         return;
6047                 }
6048         }
6049         if (lf == 0) {
6050                 /* No luns in this session */
6051                 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6052                 rw_exit(iss->iss_lockp);
6053                 mutex_exit(&stmf_state.stmf_lock);
6054                 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6055                 return;
6056         }
6057 
6058         /* ok, start the damage */
6059         itask->itask_flags |= ITASK_DEFAULT_HANDLING |
6060             ITASK_CAUSING_TARGET_RESET;
6061         for (i = 0; i < lm->lm_nentries; i++) {
6062                 if (lm->lm_plus[i] == NULL)
6063                         continue;
6064                 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6065                 ilu = (stmf_i_lu_t *)(lm_ent->ent_lu->lu_stmf_private);
6066                 atomic_or_32(&ilu->ilu_flags, ILU_RESET_ACTIVE);
6067         }
6068 
6069         for (i = 0; i < lm->lm_nentries; i++) {
6070                 if (lm->lm_plus[i] == NULL)
6071                         continue;
6072                 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6073                 stmf_abort(STMF_QUEUE_ABORT_LU, task, STMF_ABORTED,
6074                     lm_ent->ent_lu);
6075         }
6076 
6077         rw_exit(iss->iss_lockp);
6078         mutex_exit(&stmf_state.stmf_lock);
6079 
6080         /* Start polling on this task */
6081         if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
6082             != STMF_SUCCESS) {
6083                 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ALLOC_FAILURE,
6084                     NULL);
6085                 return;
6086         }
6087 }
6088 
6089 int
6090 stmf_handle_cmd_during_ic(stmf_i_scsi_task_t *itask)
6091 {
6092         scsi_task_t *task = itask->itask_task;
6093         stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
6094             task->task_session->ss_stmf_private;
6095 
6096         rw_enter(iss->iss_lockp, RW_WRITER);
6097         if (((iss->iss_flags & ISS_LUN_INVENTORY_CHANGED) == 0) ||
6098             (task->task_cdb[0] == SCMD_INQUIRY)) {
6099                 rw_exit(iss->iss_lockp);
6100                 return (0);
6101         }
6102         atomic_and_32(&iss->iss_flags,
6103             ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
6104         rw_exit(iss->iss_lockp);
6105 
6106         if (task->task_cdb[0] == SCMD_REPORT_LUNS) {
6107                 return (0);
6108         }
6109         stmf_scsilib_send_status(task, STATUS_CHECK,
6110             STMF_SAA_REPORT_LUN_DATA_HAS_CHANGED);
6111         return (1);
6112 }
6113 
6114 void
6115 stmf_worker_init()
6116 {
6117         uint32_t i;
6118 
6119         /* Make local copy of global tunables */
6120         stmf_i_max_nworkers = stmf_max_nworkers;
6121         stmf_i_min_nworkers = stmf_min_nworkers;
6122 
6123         ASSERT(stmf_workers == NULL);
6124         if (stmf_i_min_nworkers < 4) {
6125                 stmf_i_min_nworkers = 4;
6126         }
6127         if (stmf_i_max_nworkers < stmf_i_min_nworkers) {
6128                 stmf_i_max_nworkers = stmf_i_min_nworkers;
6129         }
6130         stmf_workers = (stmf_worker_t *)kmem_zalloc(
6131             sizeof (stmf_worker_t) * stmf_i_max_nworkers, KM_SLEEP);
6132         for (i = 0; i < stmf_i_max_nworkers; i++) {
6133                 stmf_worker_t *w = &stmf_workers[i];
6134                 mutex_init(&w->worker_lock, NULL, MUTEX_DRIVER, NULL);
6135                 cv_init(&w->worker_cv, NULL, CV_DRIVER, NULL);
6136         }
6137         stmf_worker_mgmt_delay = drv_usectohz(20 * 1000);
6138         stmf_workers_state = STMF_WORKERS_ENABLED;
6139 
6140         /* Workers will be started by stmf_worker_mgmt() */
6141 
6142         /* Lets wait for atleast one worker to start */
6143         while (stmf_nworkers_cur == 0)
6144                 delay(drv_usectohz(20 * 1000));
6145         stmf_worker_mgmt_delay = drv_usectohz(3 * 1000 * 1000);
6146 }
6147 
6148 stmf_status_t
6149 stmf_worker_fini()
6150 {
6151         int i;
6152         clock_t sb;
6153 
6154         if (stmf_workers_state == STMF_WORKERS_DISABLED)
6155                 return (STMF_SUCCESS);
6156         ASSERT(stmf_workers);
6157         stmf_workers_state = STMF_WORKERS_DISABLED;
6158         stmf_worker_mgmt_delay = drv_usectohz(20 * 1000);
6159         cv_signal(&stmf_state.stmf_cv);
6160 
6161         sb = ddi_get_lbolt() + drv_usectohz(10 * 1000 * 1000);
6162         /* Wait for all the threads to die */
6163         while (stmf_nworkers_cur != 0) {
6164                 if (ddi_get_lbolt() > sb) {
6165                         stmf_workers_state = STMF_WORKERS_ENABLED;
6166                         return (STMF_BUSY);
6167                 }
6168                 delay(drv_usectohz(100 * 1000));
6169         }
6170         for (i = 0; i < stmf_i_max_nworkers; i++) {
6171                 stmf_worker_t *w = &stmf_workers[i];
6172                 mutex_destroy(&w->worker_lock);
6173                 cv_destroy(&w->worker_cv);
6174         }
6175         kmem_free(stmf_workers, sizeof (stmf_worker_t) * stmf_i_max_nworkers);
6176         stmf_workers = NULL;
6177 
6178         return (STMF_SUCCESS);
6179 }
6180 
6181 void
6182 stmf_worker_task(void *arg)
6183 {
6184         stmf_worker_t *w;
6185         stmf_i_scsi_session_t *iss;
6186         scsi_task_t *task;
6187         stmf_i_scsi_task_t *itask;
6188         stmf_data_buf_t *dbuf;
6189         stmf_lu_t *lu;
6190         clock_t wait_timer = 0;
6191         clock_t wait_ticks, wait_delta = 0;
6192         uint32_t old, new;
6193         uint8_t curcmd;
6194         uint8_t abort_free;
6195         uint8_t wait_queue;
6196         uint8_t dec_qdepth;
6197 
6198         w = (stmf_worker_t *)arg;
6199         wait_ticks = drv_usectohz(10000);
6200 
6201         DTRACE_PROBE1(worker__create, stmf_worker_t, w);
6202         mutex_enter(&w->worker_lock);
6203         w->worker_flags |= STMF_WORKER_STARTED | STMF_WORKER_ACTIVE;
6204 stmf_worker_loop:;
6205         if ((w->worker_ref_count == 0) &&
6206             (w->worker_flags & STMF_WORKER_TERMINATE)) {
6207                 w->worker_flags &= ~(STMF_WORKER_STARTED |
6208                     STMF_WORKER_ACTIVE | STMF_WORKER_TERMINATE);
6209                 w->worker_tid = NULL;
6210                 mutex_exit(&w->worker_lock);
6211                 DTRACE_PROBE1(worker__destroy, stmf_worker_t, w);
6212                 thread_exit();
6213         }
6214         /* CONSTCOND */
6215         while (1) {
6216                 dec_qdepth = 0;
6217                 if (wait_timer && (ddi_get_lbolt() >= wait_timer)) {
6218                         wait_timer = 0;
6219                         wait_delta = 0;
6220                         if (w->worker_wait_head) {
6221                                 ASSERT(w->worker_wait_tail);
6222                                 if (w->worker_task_head == NULL)
6223                                         w->worker_task_head =
6224                                             w->worker_wait_head;
6225                                 else
6226                                         w->worker_task_tail->itask_worker_next =
6227                                             w->worker_wait_head;
6228                                 w->worker_task_tail = w->worker_wait_tail;
6229                                 w->worker_wait_head = w->worker_wait_tail =
6230                                     NULL;
6231                         }
6232                 }
6233                 if ((itask = w->worker_task_head) == NULL) {
6234                         break;
6235                 }
6236                 task = itask->itask_task;
6237                 DTRACE_PROBE2(worker__active, stmf_worker_t, w,
6238                     scsi_task_t *, task);
6239                 w->worker_task_head = itask->itask_worker_next;
6240                 if (w->worker_task_head == NULL)
6241                         w->worker_task_tail = NULL;
6242 
6243                 wait_queue = 0;
6244                 abort_free = 0;
6245                 if (itask->itask_ncmds > 0) {
6246                         curcmd = itask->itask_cmd_stack[itask->itask_ncmds - 1];
6247                 } else {
6248                         ASSERT(itask->itask_flags & ITASK_BEING_ABORTED);
6249                 }
6250                 do {
6251                         old = itask->itask_flags;
6252                         if (old & ITASK_BEING_ABORTED) {
6253                                 itask->itask_ncmds = 1;
6254                                 curcmd = itask->itask_cmd_stack[0] =
6255                                     ITASK_CMD_ABORT;
6256                                 goto out_itask_flag_loop;
6257                         } else if ((curcmd & ITASK_CMD_MASK) ==
6258                             ITASK_CMD_NEW_TASK) {
6259                                 /*
6260                                  * set ITASK_KSTAT_IN_RUNQ, this flag
6261                                  * will not reset until task completed
6262                                  */
6263                                 new = old | ITASK_KNOWN_TO_LU |
6264                                     ITASK_KSTAT_IN_RUNQ;
6265                         } else {
6266                                 goto out_itask_flag_loop;
6267                         }
6268                 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
6269 
6270 out_itask_flag_loop:
6271 
6272                 /*
6273                  * Decide if this task needs to go to a queue and/or if
6274                  * we can decrement the itask_cmd_stack.
6275                  */
6276                 if (curcmd == ITASK_CMD_ABORT) {
6277                         if (itask->itask_flags & (ITASK_KNOWN_TO_LU |
6278                             ITASK_KNOWN_TO_TGT_PORT)) {
6279                                 wait_queue = 1;
6280                         } else {
6281                                 abort_free = 1;
6282                         }
6283                 } else if ((curcmd & ITASK_CMD_POLL) &&
6284                     (itask->itask_poll_timeout > ddi_get_lbolt())) {
6285                         wait_queue = 1;
6286                 }
6287 
6288                 if (wait_queue) {
6289                         itask->itask_worker_next = NULL;
6290                         if (w->worker_wait_tail) {
6291                                 w->worker_wait_tail->itask_worker_next = itask;
6292                         } else {
6293                                 w->worker_wait_head = itask;
6294                         }
6295                         w->worker_wait_tail = itask;
6296                         if (wait_timer == 0) {
6297                                 wait_timer = ddi_get_lbolt() + wait_ticks;
6298                                 wait_delta = wait_ticks;
6299                         }
6300                 } else if ((--(itask->itask_ncmds)) != 0) {
6301                         itask->itask_worker_next = NULL;
6302                         if (w->worker_task_tail) {
6303                                 w->worker_task_tail->itask_worker_next = itask;
6304                         } else {
6305                                 w->worker_task_head = itask;
6306                         }
6307                         w->worker_task_tail = itask;
6308                 } else {
6309                         atomic_and_32(&itask->itask_flags,
6310                             ~ITASK_IN_WORKER_QUEUE);
6311                         /*
6312                          * This is where the queue depth should go down by
6313                          * one but we delay that on purpose to account for
6314                          * the call into the provider. The actual decrement
6315                          * happens after the worker has done its job.
6316                          */
6317                         dec_qdepth = 1;
6318                         itask->itask_waitq_time +=
6319                             gethrtime() - itask->itask_waitq_enter_timestamp;
6320                 }
6321 
6322                 /* We made it here means we are going to call LU */
6323                 if ((itask->itask_flags & ITASK_DEFAULT_HANDLING) == 0)
6324                         lu = task->task_lu;
6325                 else
6326                         lu = dlun0;
6327                 dbuf = itask->itask_dbufs[ITASK_CMD_BUF_NDX(curcmd)];
6328                 mutex_exit(&w->worker_lock);
6329                 curcmd &= ITASK_CMD_MASK;
6330                 stmf_task_audit(itask, TE_PROCESS_CMD, curcmd, dbuf);
6331                 switch (curcmd) {
6332                 case ITASK_CMD_NEW_TASK:
6333                         iss = (stmf_i_scsi_session_t *)
6334                             task->task_session->ss_stmf_private;
6335                         stmf_itl_lu_new_task(itask);
6336                         if (iss->iss_flags & ISS_LUN_INVENTORY_CHANGED) {
6337                                 if (stmf_handle_cmd_during_ic(itask))
6338                                         break;
6339                         }
6340 #ifdef  DEBUG
6341                         if (stmf_drop_task_counter > 0) {
6342                                 if (atomic_dec_32_nv(&stmf_drop_task_counter)
6343                                     == 1)
6344                                         break;
6345                         }
6346 #endif
6347                         DTRACE_PROBE1(scsi__task__start, scsi_task_t *, task);
6348                         lu->lu_new_task(task, dbuf);
6349                         break;
6350                 case ITASK_CMD_DATA_XFER_DONE:
6351                         lu->lu_dbuf_xfer_done(task, dbuf);
6352                         break;
6353                 case ITASK_CMD_STATUS_DONE:
6354                         lu->lu_send_status_done(task);
6355                         break;
6356                 case ITASK_CMD_ABORT:
6357                         if (abort_free) {
6358                                 stmf_task_free(task);
6359                         } else {
6360                                 stmf_do_task_abort(task);
6361                         }
6362                         break;
6363                 case ITASK_CMD_POLL_LU:
6364                         if (!wait_queue) {
6365                                 lu->lu_task_poll(task);
6366                         }
6367                         break;
6368                 case ITASK_CMD_POLL_LPORT:
6369                         if (!wait_queue)
6370                                 task->task_lport->lport_task_poll(task);
6371                         break;
6372                 case ITASK_CMD_SEND_STATUS:
6373                 /* case ITASK_CMD_XFER_DATA: */
6374                         break;
6375                 }
6376                 mutex_enter(&w->worker_lock);
6377                 if (dec_qdepth) {
6378                         w->worker_queue_depth--;
6379                 }
6380         }
6381         if ((w->worker_flags & STMF_WORKER_TERMINATE) && (wait_timer == 0)) {
6382                 if (w->worker_ref_count == 0)
6383                         goto stmf_worker_loop;
6384                 else {
6385                         wait_timer = ddi_get_lbolt() + 1;
6386                         wait_delta = 1;
6387                 }
6388         }
6389         w->worker_flags &= ~STMF_WORKER_ACTIVE;
6390         if (wait_timer) {
6391                 DTRACE_PROBE1(worker__timed__sleep, stmf_worker_t, w);
6392                 (void) cv_reltimedwait(&w->worker_cv, &w->worker_lock,
6393                     wait_delta, TR_CLOCK_TICK);
6394         } else {
6395                 DTRACE_PROBE1(worker__sleep, stmf_worker_t, w);
6396                 cv_wait(&w->worker_cv, &w->worker_lock);
6397         }
6398         DTRACE_PROBE1(worker__wakeup, stmf_worker_t, w);
6399         w->worker_flags |= STMF_WORKER_ACTIVE;
6400         goto stmf_worker_loop;
6401 }
6402 
6403 void
6404 stmf_worker_mgmt()
6405 {
6406         int i;
6407         int workers_needed;
6408         uint32_t qd;
6409         clock_t tps, d = 0;
6410         uint32_t cur_max_ntasks = 0;
6411         stmf_worker_t *w;
6412 
6413         /* Check if we are trying to increase the # of threads */
6414         for (i = stmf_nworkers_cur; i < stmf_nworkers_needed; i++) {
6415                 if (stmf_workers[i].worker_flags & STMF_WORKER_STARTED) {
6416                         stmf_nworkers_cur++;
6417                         stmf_nworkers_accepting_cmds++;
6418                 } else {
6419                         /* Wait for transition to complete */
6420                         return;
6421                 }
6422         }
6423         /* Check if we are trying to decrease the # of workers */
6424         for (i = (stmf_nworkers_cur - 1); i >= stmf_nworkers_needed; i--) {
6425                 if ((stmf_workers[i].worker_flags & STMF_WORKER_STARTED) == 0) {
6426                         stmf_nworkers_cur--;
6427                         /*
6428                          * stmf_nworkers_accepting_cmds has already been
6429                          * updated by the request to reduce the # of workers.
6430                          */
6431                 } else {
6432                         /* Wait for transition to complete */
6433                         return;
6434                 }
6435         }
6436         /* Check if we are being asked to quit */
6437         if (stmf_workers_state != STMF_WORKERS_ENABLED) {
6438                 if (stmf_nworkers_cur) {
6439                         workers_needed = 0;
6440                         goto worker_mgmt_trigger_change;
6441                 }
6442                 return;
6443         }
6444         /* Check if we are starting */
6445         if (stmf_nworkers_cur < stmf_i_min_nworkers) {
6446                 workers_needed = stmf_i_min_nworkers;
6447                 goto worker_mgmt_trigger_change;
6448         }
6449 
6450         tps = drv_usectohz(1 * 1000 * 1000);
6451         if ((stmf_wm_last != 0) &&
6452             ((d = ddi_get_lbolt() - stmf_wm_last) > tps)) {
6453                 qd = 0;
6454                 for (i = 0; i < stmf_nworkers_accepting_cmds; i++) {
6455                         qd += stmf_workers[i].worker_max_qdepth_pu;
6456                         stmf_workers[i].worker_max_qdepth_pu = 0;
6457                         if (stmf_workers[i].worker_max_sys_qdepth_pu >
6458                             cur_max_ntasks) {
6459                                 cur_max_ntasks =
6460                                     stmf_workers[i].worker_max_sys_qdepth_pu;
6461                         }
6462                         stmf_workers[i].worker_max_sys_qdepth_pu = 0;
6463                 }
6464         }
6465         stmf_wm_last = ddi_get_lbolt();
6466         if (d <= tps) {
6467                 /* still ramping up */
6468                 return;
6469         }
6470         /* max qdepth cannot be more than max tasks */
6471         if (qd > cur_max_ntasks)
6472                 qd = cur_max_ntasks;
6473 
6474         /* See if we have more workers */
6475         if (qd < stmf_nworkers_accepting_cmds) {
6476                 /*
6477                  * Since we dont reduce the worker count right away, monitor
6478                  * the highest load during the scale_down_delay.
6479                  */
6480                 if (qd > stmf_worker_scale_down_qd)
6481                         stmf_worker_scale_down_qd = qd;
6482                 if (stmf_worker_scale_down_timer == 0) {
6483                         stmf_worker_scale_down_timer = ddi_get_lbolt() +
6484                             drv_usectohz(stmf_worker_scale_down_delay *
6485                             1000 * 1000);
6486                         return;
6487                 }
6488                 if (ddi_get_lbolt() < stmf_worker_scale_down_timer) {
6489                         return;
6490                 }
6491                 /* Its time to reduce the workers */
6492                 if (stmf_worker_scale_down_qd < stmf_i_min_nworkers)
6493                         stmf_worker_scale_down_qd = stmf_i_min_nworkers;
6494                 if (stmf_worker_scale_down_qd > stmf_i_max_nworkers)
6495                         stmf_worker_scale_down_qd = stmf_i_max_nworkers;
6496                 if (stmf_worker_scale_down_qd == stmf_nworkers_cur)
6497                         return;
6498                 workers_needed = stmf_worker_scale_down_qd;
6499                 stmf_worker_scale_down_qd = 0;
6500                 goto worker_mgmt_trigger_change;
6501         }
6502         stmf_worker_scale_down_qd = 0;
6503         stmf_worker_scale_down_timer = 0;
6504         if (qd > stmf_i_max_nworkers)
6505                 qd = stmf_i_max_nworkers;
6506         if (qd < stmf_i_min_nworkers)
6507                 qd = stmf_i_min_nworkers;
6508         if (qd == stmf_nworkers_cur)
6509                 return;
6510         workers_needed = qd;
6511         goto worker_mgmt_trigger_change;
6512 
6513         /* NOTREACHED */
6514         return;
6515 
6516 worker_mgmt_trigger_change:
6517         ASSERT(workers_needed != stmf_nworkers_cur);
6518         if (workers_needed > stmf_nworkers_cur) {
6519                 stmf_nworkers_needed = workers_needed;
6520                 for (i = stmf_nworkers_cur; i < workers_needed; i++) {
6521                         w = &stmf_workers[i];
6522                         w->worker_tid = thread_create(NULL, 0, stmf_worker_task,
6523                             (void *)&stmf_workers[i], 0, &p0, TS_RUN,
6524                             minclsyspri);
6525                 }
6526                 return;
6527         }
6528         /* At this point we know that we are decreasing the # of workers */
6529         stmf_nworkers_accepting_cmds = workers_needed;
6530         stmf_nworkers_needed = workers_needed;
6531         /* Signal the workers that its time to quit */
6532         for (i = (stmf_nworkers_cur - 1); i >= stmf_nworkers_needed; i--) {
6533                 w = &stmf_workers[i];
6534                 ASSERT(w && (w->worker_flags & STMF_WORKER_STARTED));
6535                 mutex_enter(&w->worker_lock);
6536                 w->worker_flags |= STMF_WORKER_TERMINATE;
6537                 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
6538                         cv_signal(&w->worker_cv);
6539                 mutex_exit(&w->worker_lock);
6540         }
6541 }
6542 
6543 /*
6544  * Fills out a dbuf from stmf_xfer_data_t (contained in the db_lu_private).
6545  * If all the data has been filled out, frees the xd and makes
6546  * db_lu_private NULL.
6547  */
6548 void
6549 stmf_xd_to_dbuf(stmf_data_buf_t *dbuf, int set_rel_off)
6550 {
6551         stmf_xfer_data_t *xd;
6552         uint8_t *p;
6553         int i;
6554         uint32_t s;
6555 
6556         xd = (stmf_xfer_data_t *)dbuf->db_lu_private;
6557         dbuf->db_data_size = 0;
6558         if (set_rel_off)
6559                 dbuf->db_relative_offset = xd->size_done;
6560         for (i = 0; i < dbuf->db_sglist_length; i++) {
6561                 s = min(xd->size_left, dbuf->db_sglist[i].seg_length);
6562                 p = &xd->buf[xd->size_done];
6563                 bcopy(p, dbuf->db_sglist[i].seg_addr, s);
6564                 xd->size_left -= s;
6565                 xd->size_done += s;
6566                 dbuf->db_data_size += s;
6567                 if (xd->size_left == 0) {
6568                         kmem_free(xd, xd->alloc_size);
6569                         dbuf->db_lu_private = NULL;
6570                         return;
6571                 }
6572         }
6573 }
6574 
6575 /* ARGSUSED */
6576 stmf_status_t
6577 stmf_dlun0_task_alloc(scsi_task_t *task)
6578 {
6579         return (STMF_SUCCESS);
6580 }
6581 
6582 void
6583 stmf_dlun0_new_task(scsi_task_t *task, stmf_data_buf_t *dbuf)
6584 {
6585         uint8_t *cdbp = (uint8_t *)&task->task_cdb[0];
6586         stmf_i_scsi_session_t *iss;
6587         uint32_t sz, minsz;
6588         uint8_t *p;
6589         stmf_xfer_data_t *xd;
6590         uint8_t inq_page_length = 31;
6591 
6592         if (task->task_mgmt_function) {
6593                 stmf_scsilib_handle_task_mgmt(task);
6594                 return;
6595         }
6596 
6597         switch (cdbp[0]) {
6598         case SCMD_INQUIRY:
6599                 /*
6600                  * Basic protocol checks.  In addition, only reply to
6601                  * standard inquiry.  Otherwise, the LU provider needs
6602                  * to respond.
6603                  */
6604 
6605                 if (cdbp[2] || (cdbp[1] & 1) || cdbp[5]) {
6606                         stmf_scsilib_send_status(task, STATUS_CHECK,
6607                             STMF_SAA_INVALID_FIELD_IN_CDB);
6608                         return;
6609                 }
6610 
6611                 task->task_cmd_xfer_length =
6612                     (((uint32_t)cdbp[3]) << 8) | cdbp[4];
6613 
6614                 if (task->task_additional_flags &
6615                     TASK_AF_NO_EXPECTED_XFER_LENGTH) {
6616                         task->task_expected_xfer_length =
6617                             task->task_cmd_xfer_length;
6618                 }
6619 
6620                 sz = min(task->task_expected_xfer_length,
6621                     min(36, task->task_cmd_xfer_length));
6622                 minsz = 36;
6623 
6624                 if (sz == 0) {
6625                         stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6626                         return;
6627                 }
6628 
6629                 if (dbuf && (dbuf->db_sglist[0].seg_length < 36)) {
6630                         /*
6631                          * Ignore any preallocated dbuf if the size is less
6632                          * than 36. It will be freed during the task_free.
6633                          */
6634                         dbuf = NULL;
6635                 }
6636                 if (dbuf == NULL)
6637                         dbuf = stmf_alloc_dbuf(task, minsz, &minsz, 0);
6638                 if ((dbuf == NULL) || (dbuf->db_sglist[0].seg_length < sz)) {
6639                         stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6640                             STMF_ALLOC_FAILURE, NULL);
6641                         return;
6642                 }
6643                 dbuf->db_lu_private = NULL;
6644 
6645                 p = dbuf->db_sglist[0].seg_addr;
6646 
6647                 /*
6648                  * Standard inquiry handling only.
6649                  */
6650 
6651                 bzero(p, inq_page_length + 5);
6652 
6653                 p[0] = DPQ_SUPPORTED | DTYPE_UNKNOWN;
6654                 p[2] = 5;
6655                 p[3] = 0x12;
6656                 p[4] = inq_page_length;
6657                 p[6] = 0x80;
6658 
6659                 (void) strncpy((char *)p+8, "SUN     ", 8);
6660                 (void) strncpy((char *)p+16, "COMSTAR          ", 16);
6661                 (void) strncpy((char *)p+32, "1.0 ", 4);
6662 
6663                 dbuf->db_data_size = sz;
6664                 dbuf->db_relative_offset = 0;
6665                 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
6666                 (void) stmf_xfer_data(task, dbuf, 0);
6667 
6668                 return;
6669 
6670         case SCMD_REPORT_LUNS:
6671                 task->task_cmd_xfer_length =
6672                     ((((uint32_t)task->task_cdb[6]) << 24) |
6673                     (((uint32_t)task->task_cdb[7]) << 16) |
6674                     (((uint32_t)task->task_cdb[8]) << 8) |
6675                     ((uint32_t)task->task_cdb[9]));
6676 
6677                 if (task->task_additional_flags &
6678                     TASK_AF_NO_EXPECTED_XFER_LENGTH) {
6679                         task->task_expected_xfer_length =
6680                             task->task_cmd_xfer_length;
6681                 }
6682 
6683                 sz = min(task->task_expected_xfer_length,
6684                     task->task_cmd_xfer_length);
6685 
6686                 if (sz < 16) {
6687                         stmf_scsilib_send_status(task, STATUS_CHECK,
6688                             STMF_SAA_INVALID_FIELD_IN_CDB);
6689                         return;
6690                 }
6691 
6692                 iss = (stmf_i_scsi_session_t *)
6693                     task->task_session->ss_stmf_private;
6694                 rw_enter(iss->iss_lockp, RW_WRITER);
6695                 xd = stmf_session_prepare_report_lun_data(iss->iss_sm);
6696                 rw_exit(iss->iss_lockp);
6697 
6698                 if (xd == NULL) {
6699                         stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6700                             STMF_ALLOC_FAILURE, NULL);
6701                         return;
6702                 }
6703 
6704                 sz = min(sz, xd->size_left);
6705                 xd->size_left = sz;
6706                 minsz = min(512, sz);
6707 
6708                 if (dbuf == NULL)
6709                         dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
6710                 if (dbuf == NULL) {
6711                         kmem_free(xd, xd->alloc_size);
6712                         stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6713                             STMF_ALLOC_FAILURE, NULL);
6714                         return;
6715                 }
6716                 dbuf->db_lu_private = xd;
6717                 stmf_xd_to_dbuf(dbuf, 1);
6718 
6719                 atomic_and_32(&iss->iss_flags,
6720                     ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
6721                 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
6722                 (void) stmf_xfer_data(task, dbuf, 0);
6723                 return;
6724         }
6725 
6726         stmf_scsilib_send_status(task, STATUS_CHECK, STMF_SAA_INVALID_OPCODE);
6727 }
6728 
6729 void
6730 stmf_dlun0_dbuf_done(scsi_task_t *task, stmf_data_buf_t *dbuf)
6731 {
6732         stmf_i_scsi_task_t *itask =
6733             (stmf_i_scsi_task_t *)task->task_stmf_private;
6734 
6735         if (dbuf->db_xfer_status != STMF_SUCCESS) {
6736                 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6737                     dbuf->db_xfer_status, NULL);
6738                 return;
6739         }
6740         task->task_nbytes_transferred += dbuf->db_data_size;
6741         if (dbuf->db_lu_private) {
6742                 /* There is more */
6743                 stmf_xd_to_dbuf(dbuf, 1);
6744                 (void) stmf_xfer_data(task, dbuf, 0);
6745                 return;
6746         }
6747 
6748         stmf_free_dbuf(task, dbuf);
6749         /*
6750          * If this is a proxy task, it will need to be completed from the
6751          * proxy port provider. This message lets pppt know that the xfer
6752          * is complete. When we receive the status from pppt, we will
6753          * then relay that status back to the lport.
6754          */
6755         if (itask->itask_flags & ITASK_PROXY_TASK) {
6756                 stmf_ic_msg_t *ic_xfer_done_msg = NULL;
6757                 stmf_status_t ic_ret = STMF_FAILURE;
6758                 uint64_t session_msg_id;
6759                 mutex_enter(&stmf_state.stmf_lock);
6760                 session_msg_id = stmf_proxy_msg_id++;
6761                 mutex_exit(&stmf_state.stmf_lock);
6762                 /* send xfer done status to pppt */
6763                 ic_xfer_done_msg = ic_scsi_data_xfer_done_msg_alloc(
6764                     itask->itask_proxy_msg_id,
6765                     task->task_session->ss_session_id,
6766                     STMF_SUCCESS, session_msg_id);
6767                 if (ic_xfer_done_msg) {
6768                         ic_ret = ic_tx_msg(ic_xfer_done_msg);
6769                         if (ic_ret != STMF_IC_MSG_SUCCESS) {
6770                                 cmn_err(CE_WARN, "unable to xmit session msg");
6771                         }
6772                 }
6773                 /* task will be completed from pppt */
6774                 return;
6775         }
6776         stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6777 }
6778 
6779 /* ARGSUSED */
6780 void
6781 stmf_dlun0_status_done(scsi_task_t *task)
6782 {
6783 }
6784 
6785 /* ARGSUSED */
6786 void
6787 stmf_dlun0_task_free(scsi_task_t *task)
6788 {
6789 }
6790 
6791 /* ARGSUSED */
6792 stmf_status_t
6793 stmf_dlun0_abort(struct stmf_lu *lu, int abort_cmd, void *arg, uint32_t flags)
6794 {
6795         scsi_task_t *task = (scsi_task_t *)arg;
6796         stmf_i_scsi_task_t *itask =
6797             (stmf_i_scsi_task_t *)task->task_stmf_private;
6798         stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
6799         int i;
6800         uint8_t map;
6801 
6802         if ((task->task_mgmt_function) && (itask->itask_flags &
6803             (ITASK_CAUSING_LU_RESET | ITASK_CAUSING_TARGET_RESET))) {
6804                 switch (task->task_mgmt_function) {
6805                 case TM_ABORT_TASK:
6806                 case TM_ABORT_TASK_SET:
6807                 case TM_CLEAR_TASK_SET:
6808                 case TM_LUN_RESET:
6809                         atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6810                         break;
6811                 case TM_TARGET_RESET:
6812                 case TM_TARGET_COLD_RESET:
6813                 case TM_TARGET_WARM_RESET:
6814                         stmf_abort_target_reset(task);
6815                         break;
6816                 }
6817                 return (STMF_ABORT_SUCCESS);
6818         }
6819 
6820         /*
6821          * OK so its not a task mgmt. Make sure we free any xd sitting
6822          * inside any dbuf.
6823          */
6824         if ((map = itask->itask_allocated_buf_map) != 0) {
6825                 for (i = 0; i < 4; i++) {
6826                         if ((map & 1) &&
6827                             ((itask->itask_dbufs[i])->db_lu_private)) {
6828                                 stmf_xfer_data_t *xd;
6829                                 stmf_data_buf_t *dbuf;
6830 
6831                                 dbuf = itask->itask_dbufs[i];
6832                                 xd = (stmf_xfer_data_t *)dbuf->db_lu_private;
6833                                 dbuf->db_lu_private = NULL;
6834                                 kmem_free(xd, xd->alloc_size);
6835                         }
6836                         map >>= 1;
6837                 }
6838         }
6839         return (STMF_ABORT_SUCCESS);
6840 }
6841 
6842 void
6843 stmf_dlun0_task_poll(struct scsi_task *task)
6844 {
6845         /* Right now we only do this for handling task management functions */
6846         ASSERT(task->task_mgmt_function);
6847 
6848         switch (task->task_mgmt_function) {
6849         case TM_ABORT_TASK:
6850         case TM_ABORT_TASK_SET:
6851         case TM_CLEAR_TASK_SET:
6852         case TM_LUN_RESET:
6853                 (void) stmf_lun_reset_poll(task->task_lu, task, 0);
6854                 return;
6855         case TM_TARGET_RESET:
6856         case TM_TARGET_COLD_RESET:
6857         case TM_TARGET_WARM_RESET:
6858                 stmf_target_reset_poll(task);
6859                 return;
6860         }
6861 }
6862 
6863 /* ARGSUSED */
6864 void
6865 stmf_dlun0_ctl(struct stmf_lu *lu, int cmd, void *arg)
6866 {
6867         /* This function will never be called */
6868         cmn_err(CE_WARN, "stmf_dlun0_ctl called with cmd %x", cmd);
6869 }
6870 
6871 void
6872 stmf_dlun_init()
6873 {
6874         stmf_i_lu_t *ilu;
6875 
6876         dlun0 = stmf_alloc(STMF_STRUCT_STMF_LU, 0, 0);
6877         dlun0->lu_task_alloc = stmf_dlun0_task_alloc;
6878         dlun0->lu_new_task = stmf_dlun0_new_task;
6879         dlun0->lu_dbuf_xfer_done = stmf_dlun0_dbuf_done;
6880         dlun0->lu_send_status_done = stmf_dlun0_status_done;
6881         dlun0->lu_task_free = stmf_dlun0_task_free;
6882         dlun0->lu_abort = stmf_dlun0_abort;
6883         dlun0->lu_task_poll = stmf_dlun0_task_poll;
6884         dlun0->lu_ctl = stmf_dlun0_ctl;
6885 
6886         ilu = (stmf_i_lu_t *)dlun0->lu_stmf_private;
6887         ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
6888 }
6889 
6890 stmf_status_t
6891 stmf_dlun_fini()
6892 {
6893         stmf_i_lu_t *ilu;
6894 
6895         ilu = (stmf_i_lu_t *)dlun0->lu_stmf_private;
6896 
6897         ASSERT(ilu->ilu_ntasks == ilu->ilu_ntasks_free);
6898         if (ilu->ilu_ntasks) {
6899                 stmf_i_scsi_task_t *itask, *nitask;
6900 
6901                 nitask = ilu->ilu_tasks;
6902                 do {
6903                         itask = nitask;
6904                         nitask = itask->itask_lu_next;
6905                         dlun0->lu_task_free(itask->itask_task);
6906                         stmf_free(itask->itask_task);
6907                 } while (nitask != NULL);
6908 
6909         }
6910         stmf_free(dlun0);
6911         return (STMF_SUCCESS);
6912 }
6913 
6914 void
6915 stmf_abort_target_reset(scsi_task_t *task)
6916 {
6917         stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
6918             task->task_session->ss_stmf_private;
6919         stmf_lun_map_t *lm;
6920         stmf_lun_map_ent_t *lm_ent;
6921         stmf_i_lu_t *ilu;
6922         int i;
6923 
6924         rw_enter(iss->iss_lockp, RW_READER);
6925         lm = iss->iss_sm;
6926         for (i = 0; i < lm->lm_nentries; i++) {
6927                 if (lm->lm_plus[i] == NULL)
6928                         continue;
6929                 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6930                 ilu = (stmf_i_lu_t *)lm_ent->ent_lu->lu_stmf_private;
6931                 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
6932                         atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6933                 }
6934         }
6935         atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6936         rw_exit(iss->iss_lockp);
6937 }
6938 
6939 /*
6940  * The return value is only used by function managing target reset.
6941  */
6942 stmf_status_t
6943 stmf_lun_reset_poll(stmf_lu_t *lu, struct scsi_task *task, int target_reset)
6944 {
6945         stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
6946         int ntasks_pending;
6947 
6948         ntasks_pending = ilu->ilu_ntasks - ilu->ilu_ntasks_free;
6949         /*
6950          * This function is also used during Target reset. The idea is that
6951          * once all the commands are aborted, call the LU's reset entry
6952          * point (abort entry point with a reset flag). But if this Task
6953          * mgmt is running on this LU then all the tasks cannot be aborted.
6954          * one task (this task) will still be running which is OK.
6955          */
6956         if ((ntasks_pending == 0) || ((task->task_lu == lu) &&
6957             (ntasks_pending == 1))) {
6958                 stmf_status_t ret;
6959 
6960                 if ((task->task_mgmt_function == TM_LUN_RESET) ||
6961                     (task->task_mgmt_function == TM_TARGET_RESET) ||
6962                     (task->task_mgmt_function == TM_TARGET_WARM_RESET) ||
6963                     (task->task_mgmt_function == TM_TARGET_COLD_RESET)) {
6964                         ret = lu->lu_abort(lu, STMF_LU_RESET_STATE, task, 0);
6965                 } else {
6966                         ret = STMF_SUCCESS;
6967                 }
6968                 if (ret == STMF_SUCCESS) {
6969                         atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6970                 }
6971                 if (target_reset) {
6972                         return (ret);
6973                 }
6974                 if (ret == STMF_SUCCESS) {
6975                         stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6976                         return (ret);
6977                 }
6978                 if (ret != STMF_BUSY) {
6979                         stmf_abort(STMF_QUEUE_TASK_ABORT, task, ret, NULL);
6980                         return (ret);
6981                 }
6982         }
6983 
6984         if (target_reset) {
6985                 /* Tell target reset polling code that we are not done */
6986                 return (STMF_BUSY);
6987         }
6988 
6989         if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
6990             != STMF_SUCCESS) {
6991                 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6992                     STMF_ALLOC_FAILURE, NULL);
6993                 return (STMF_SUCCESS);
6994         }
6995 
6996         return (STMF_SUCCESS);
6997 }
6998 
6999 void
7000 stmf_target_reset_poll(struct scsi_task *task)
7001 {
7002         stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
7003             task->task_session->ss_stmf_private;
7004         stmf_lun_map_t *lm;
7005         stmf_lun_map_ent_t *lm_ent;
7006         stmf_i_lu_t *ilu;
7007         stmf_status_t ret;
7008         int i;
7009         int not_done = 0;
7010 
7011         ASSERT(iss->iss_flags & ISS_RESET_ACTIVE);
7012 
7013         rw_enter(iss->iss_lockp, RW_READER);
7014         lm = iss->iss_sm;
7015         for (i = 0; i < lm->lm_nentries; i++) {
7016                 if (lm->lm_plus[i] == NULL)
7017                         continue;
7018                 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
7019                 ilu = (stmf_i_lu_t *)lm_ent->ent_lu->lu_stmf_private;
7020                 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
7021                         rw_exit(iss->iss_lockp);
7022                         ret = stmf_lun_reset_poll(lm_ent->ent_lu, task, 1);
7023                         rw_enter(iss->iss_lockp, RW_READER);
7024                         if (ret == STMF_SUCCESS)
7025                                 continue;
7026                         not_done = 1;
7027                         if (ret != STMF_BUSY) {
7028                                 rw_exit(iss->iss_lockp);
7029                                 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
7030                                     STMF_ABORTED, NULL);
7031                                 return;
7032                         }
7033                 }
7034         }
7035         rw_exit(iss->iss_lockp);
7036 
7037         if (not_done) {
7038                 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
7039                     != STMF_SUCCESS) {
7040                         stmf_abort(STMF_QUEUE_TASK_ABORT, task,
7041                             STMF_ALLOC_FAILURE, NULL);
7042                         return;
7043                 }
7044                 return;
7045         }
7046 
7047         atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
7048 
7049         stmf_scsilib_send_status(task, STATUS_GOOD, 0);
7050 }
7051 
7052 stmf_status_t
7053 stmf_lu_add_event(stmf_lu_t *lu, int eventid)
7054 {
7055         stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7056 
7057         if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7058                 return (STMF_INVALID_ARG);
7059         }
7060 
7061         STMF_EVENT_ADD(ilu->ilu_event_hdl, eventid);
7062         return (STMF_SUCCESS);
7063 }
7064 
7065 stmf_status_t
7066 stmf_lu_remove_event(stmf_lu_t *lu, int eventid)
7067 {
7068         stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7069 
7070         if (eventid == STMF_EVENT_ALL) {
7071                 STMF_EVENT_CLEAR_ALL(ilu->ilu_event_hdl);
7072                 return (STMF_SUCCESS);
7073         }
7074 
7075         if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7076                 return (STMF_INVALID_ARG);
7077         }
7078 
7079         STMF_EVENT_REMOVE(ilu->ilu_event_hdl, eventid);
7080         return (STMF_SUCCESS);
7081 }
7082 
7083 stmf_status_t
7084 stmf_lport_add_event(stmf_local_port_t *lport, int eventid)
7085 {
7086         stmf_i_local_port_t *ilport =
7087             (stmf_i_local_port_t *)lport->lport_stmf_private;
7088 
7089         if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7090                 return (STMF_INVALID_ARG);
7091         }
7092 
7093         STMF_EVENT_ADD(ilport->ilport_event_hdl, eventid);
7094         return (STMF_SUCCESS);
7095 }
7096 
7097 stmf_status_t
7098 stmf_lport_remove_event(stmf_local_port_t *lport, int eventid)
7099 {
7100         stmf_i_local_port_t *ilport =
7101             (stmf_i_local_port_t *)lport->lport_stmf_private;
7102 
7103         if (eventid == STMF_EVENT_ALL) {
7104                 STMF_EVENT_CLEAR_ALL(ilport->ilport_event_hdl);
7105                 return (STMF_SUCCESS);
7106         }
7107 
7108         if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7109                 return (STMF_INVALID_ARG);
7110         }
7111 
7112         STMF_EVENT_REMOVE(ilport->ilport_event_hdl, eventid);
7113         return (STMF_SUCCESS);
7114 }
7115 
7116 void
7117 stmf_generate_lu_event(stmf_i_lu_t *ilu, int eventid, void *arg, uint32_t flags)
7118 {
7119         if (STMF_EVENT_ENABLED(ilu->ilu_event_hdl, eventid) &&
7120             (ilu->ilu_lu->lu_event_handler != NULL)) {
7121                 ilu->ilu_lu->lu_event_handler(ilu->ilu_lu, eventid, arg, flags);
7122         }
7123 }
7124 
7125 void
7126 stmf_generate_lport_event(stmf_i_local_port_t *ilport, int eventid, void *arg,
7127                                 uint32_t flags)
7128 {
7129         if (STMF_EVENT_ENABLED(ilport->ilport_event_hdl, eventid) &&
7130             (ilport->ilport_lport->lport_event_handler != NULL)) {
7131                 ilport->ilport_lport->lport_event_handler(
7132                     ilport->ilport_lport, eventid, arg, flags);
7133         }
7134 }
7135 
7136 /*
7137  * With the possibility of having multiple itl sessions pointing to the
7138  * same itl_kstat_info, the ilu_kstat_lock mutex is used to synchronize
7139  * the kstat update of the ilu_kstat_io, itl_kstat_taskq and itl_kstat_lu_xfer
7140  * statistics.
7141  */
7142 void
7143 stmf_itl_task_start(stmf_i_scsi_task_t *itask)
7144 {
7145         stmf_itl_data_t *itl = itask->itask_itl_datap;
7146         scsi_task_t     *task = itask->itask_task;
7147         stmf_i_lu_t     *ilu;
7148 
7149         if (itl == NULL || task->task_lu == dlun0)
7150                 return;
7151         ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7152         itask->itask_start_timestamp = gethrtime();
7153         if (ilu->ilu_kstat_io != NULL) {
7154                 mutex_enter(ilu->ilu_kstat_io->ks_lock);
7155                 stmf_update_kstat_lu_q(itask->itask_task, kstat_waitq_enter);
7156                 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7157         }
7158 
7159         stmf_update_kstat_lport_q(itask->itask_task, kstat_waitq_enter);
7160 }
7161 
7162 void
7163 stmf_itl_lu_new_task(stmf_i_scsi_task_t *itask)
7164 {
7165         stmf_itl_data_t *itl = itask->itask_itl_datap;
7166         scsi_task_t     *task = itask->itask_task;
7167         stmf_i_lu_t     *ilu;
7168 
7169         if (itl == NULL || task->task_lu == dlun0)
7170                 return;
7171         ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7172         if (ilu->ilu_kstat_io != NULL) {
7173                 mutex_enter(ilu->ilu_kstat_io->ks_lock);
7174                 stmf_update_kstat_lu_q(itask->itask_task, kstat_waitq_to_runq);
7175                 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7176         }
7177 
7178         stmf_update_kstat_lport_q(itask->itask_task, kstat_waitq_to_runq);
7179 }
7180 
7181 void
7182 stmf_itl_task_done(stmf_i_scsi_task_t *itask)
7183 {
7184         stmf_itl_data_t         *itl = itask->itask_itl_datap;
7185         scsi_task_t             *task = itask->itask_task;
7186         stmf_i_lu_t     *ilu;
7187 
7188         itask->itask_done_timestamp = gethrtime();
7189 
7190         if (itl == NULL || task->task_lu == dlun0)
7191                 return;
7192         ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7193 
7194         if (ilu->ilu_kstat_io == NULL)
7195                 return;
7196 
7197         mutex_enter(ilu->ilu_kstat_io->ks_lock);
7198 
7199         if (itask->itask_flags & ITASK_KSTAT_IN_RUNQ) {
7200                 stmf_update_kstat_lu_q(task, kstat_runq_exit);
7201                 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7202                 stmf_update_kstat_lport_q(task, kstat_runq_exit);
7203         } else {
7204                 stmf_update_kstat_lu_q(task, kstat_waitq_exit);
7205                 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7206                 stmf_update_kstat_lport_q(task, kstat_waitq_exit);
7207         }
7208 }
7209 
7210 static void
7211 stmf_lport_xfer_start(stmf_i_scsi_task_t *itask, stmf_data_buf_t *dbuf)
7212 {
7213         stmf_itl_data_t         *itl = itask->itask_itl_datap;
7214 
7215         if (itl == NULL)
7216                 return;
7217 
7218         DTRACE_PROBE2(scsi__xfer__start, scsi_task_t *, itask->itask_task,
7219             stmf_data_buf_t *, dbuf);
7220 
7221         dbuf->db_xfer_start_timestamp = gethrtime();
7222 }
7223 
7224 static void
7225 stmf_lport_xfer_done(stmf_i_scsi_task_t *itask, stmf_data_buf_t *dbuf)
7226 {
7227         stmf_itl_data_t         *itl = itask->itask_itl_datap;
7228         hrtime_t                elapsed_time;
7229         uint64_t                xfer_size;
7230 
7231         if (itl == NULL)
7232                 return;
7233 
7234         xfer_size = (dbuf->db_xfer_status == STMF_SUCCESS) ?
7235             dbuf->db_data_size : 0;
7236 
7237         elapsed_time = gethrtime() - dbuf->db_xfer_start_timestamp;
7238         if (dbuf->db_flags & DB_DIRECTION_TO_RPORT) {
7239                 atomic_add_64((uint64_t *)&itask->itask_lport_read_time,
7240                     elapsed_time);
7241                 atomic_add_64((uint64_t *)&itask->itask_read_xfer,
7242                     xfer_size);
7243         } else {
7244                 atomic_add_64((uint64_t *)&itask->itask_lport_write_time,
7245                     elapsed_time);
7246                 atomic_add_64((uint64_t *)&itask->itask_write_xfer,
7247                     xfer_size);
7248         }
7249 
7250         DTRACE_PROBE3(scsi__xfer__end, scsi_task_t *, itask->itask_task,
7251             stmf_data_buf_t *, dbuf, hrtime_t, elapsed_time);
7252 
7253         dbuf->db_xfer_start_timestamp = 0;
7254 }
7255 
7256 void
7257 stmf_svc_init()
7258 {
7259         if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED)
7260                 return;
7261         stmf_state.stmf_svc_tailp = &stmf_state.stmf_svc_active;
7262         stmf_state.stmf_svc_taskq = ddi_taskq_create(0, "STMF_SVC_TASKQ", 1,
7263             TASKQ_DEFAULTPRI, 0);
7264         (void) ddi_taskq_dispatch(stmf_state.stmf_svc_taskq,
7265             stmf_svc, 0, DDI_SLEEP);
7266 }
7267 
7268 stmf_status_t
7269 stmf_svc_fini()
7270 {
7271         uint32_t i;
7272 
7273         mutex_enter(&stmf_state.stmf_lock);
7274         if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED) {
7275                 stmf_state.stmf_svc_flags |= STMF_SVC_TERMINATE;
7276                 cv_signal(&stmf_state.stmf_cv);
7277         }
7278         mutex_exit(&stmf_state.stmf_lock);
7279 
7280         /* Wait for 5 seconds */
7281         for (i = 0; i < 500; i++) {
7282                 if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED)
7283                         delay(drv_usectohz(10000));
7284                 else
7285                         break;
7286         }
7287         if (i == 500)
7288                 return (STMF_BUSY);
7289 
7290         ddi_taskq_destroy(stmf_state.stmf_svc_taskq);
7291 
7292         return (STMF_SUCCESS);
7293 }
7294 
7295 struct stmf_svc_clocks {
7296         clock_t drain_start, drain_next;
7297         clock_t timing_start, timing_next;
7298         clock_t worker_delay;
7299 };
7300 
7301 /* ARGSUSED */
7302 void
7303 stmf_svc(void *arg)
7304 {
7305         stmf_svc_req_t *req;
7306         stmf_lu_t *lu;
7307         stmf_i_lu_t *ilu;
7308         stmf_local_port_t *lport;
7309         struct stmf_svc_clocks clks = { 0 };
7310 
7311         mutex_enter(&stmf_state.stmf_lock);
7312         stmf_state.stmf_svc_flags |= STMF_SVC_STARTED | STMF_SVC_ACTIVE;
7313 
7314         while (!(stmf_state.stmf_svc_flags & STMF_SVC_TERMINATE)) {
7315                 if (stmf_state.stmf_svc_active == NULL) {
7316                         stmf_svc_timeout(&clks);
7317                         continue;
7318                 }
7319 
7320                 /*
7321                  * Pop the front request from the active list.  After this,
7322                  * the request will no longer be referenced by global state,
7323                  * so it should be safe to access it without holding the
7324                  * stmf state lock.
7325                  */
7326                 req = stmf_state.stmf_svc_active;
7327                 stmf_state.stmf_svc_active = req->svc_next;
7328 
7329                 if (stmf_state.stmf_svc_active == NULL)
7330                         stmf_state.stmf_svc_tailp = &stmf_state.stmf_svc_active;
7331 
7332                 switch (req->svc_cmd) {
7333                 case STMF_CMD_LPORT_ONLINE:
7334                         /* Fallthrough */
7335                 case STMF_CMD_LPORT_OFFLINE:
7336                         mutex_exit(&stmf_state.stmf_lock);
7337                         lport = (stmf_local_port_t *)req->svc_obj;
7338                         lport->lport_ctl(lport, req->svc_cmd, &req->svc_info);
7339                         break;
7340                 case STMF_CMD_LU_ONLINE:
7341                         mutex_exit(&stmf_state.stmf_lock);
7342                         lu = (stmf_lu_t *)req->svc_obj;
7343                         lu->lu_ctl(lu, req->svc_cmd, &req->svc_info);
7344                         break;
7345                 case STMF_CMD_LU_OFFLINE:
7346                         /* Remove all mappings of this LU */
7347                         stmf_session_lu_unmapall((stmf_lu_t *)req->svc_obj);
7348                         /* Kill all the pending I/Os for this LU */
7349                         mutex_exit(&stmf_state.stmf_lock);
7350                         stmf_task_lu_killall((stmf_lu_t *)req->svc_obj, NULL,
7351                             STMF_ABORTED);
7352                         lu = (stmf_lu_t *)req->svc_obj;
7353                         ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7354                         stmf_wait_ilu_tasks_finish(ilu);
7355                         lu->lu_ctl(lu, req->svc_cmd, &req->svc_info);
7356                         break;
7357                 default:
7358                         cmn_err(CE_PANIC, "stmf_svc: unknown cmd %d",
7359                             req->svc_cmd);
7360                 }
7361 
7362                 kmem_free(req, req->svc_req_alloc_size);
7363                 mutex_enter(&stmf_state.stmf_lock);
7364         }
7365 
7366         stmf_state.stmf_svc_flags &= ~(STMF_SVC_STARTED | STMF_SVC_ACTIVE);
7367         mutex_exit(&stmf_state.stmf_lock);
7368 }
7369 
7370 static void
7371 stmf_svc_timeout(struct stmf_svc_clocks *clks)
7372 {
7373         clock_t td;
7374         stmf_i_local_port_t *ilport, *next_ilport;
7375         stmf_i_scsi_session_t *iss;
7376 
7377         ASSERT(mutex_owned(&stmf_state.stmf_lock));
7378 
7379         td = drv_usectohz(20000);
7380 
7381         /* Do timeouts */
7382         if (stmf_state.stmf_nlus &&
7383             ((!clks->timing_next) || (ddi_get_lbolt() >= clks->timing_next))) {
7384                 if (!stmf_state.stmf_svc_ilu_timing) {
7385                         /* we are starting a new round */
7386                         stmf_state.stmf_svc_ilu_timing =
7387                             stmf_state.stmf_ilulist;
7388                         clks->timing_start = ddi_get_lbolt();
7389                 }
7390 
7391                 stmf_check_ilu_timing();
7392                 if (!stmf_state.stmf_svc_ilu_timing) {
7393                         /* we finished a complete round */
7394                         clks->timing_next =
7395                             clks->timing_start + drv_usectohz(5*1000*1000);
7396                 } else {
7397                         /* we still have some ilu items to check */
7398                         clks->timing_next =
7399                             ddi_get_lbolt() + drv_usectohz(1*1000*1000);
7400                 }
7401 
7402                 if (stmf_state.stmf_svc_active)
7403                         return;
7404         }
7405 
7406         /* Check if there are free tasks to clear */
7407         if (stmf_state.stmf_nlus &&
7408             ((!clks->drain_next) || (ddi_get_lbolt() >= clks->drain_next))) {
7409                 if (!stmf_state.stmf_svc_ilu_draining) {
7410                         /* we are starting a new round */
7411                         stmf_state.stmf_svc_ilu_draining =
7412                             stmf_state.stmf_ilulist;
7413                         clks->drain_start = ddi_get_lbolt();
7414                 }
7415 
7416                 stmf_check_freetask();
7417                 if (!stmf_state.stmf_svc_ilu_draining) {
7418                         /* we finished a complete round */
7419                         clks->drain_next =
7420                             clks->drain_start + drv_usectohz(10*1000*1000);
7421                 } else {
7422                         /* we still have some ilu items to check */
7423                         clks->drain_next =
7424                             ddi_get_lbolt() + drv_usectohz(1*1000*1000);
7425                 }
7426 
7427                 if (stmf_state.stmf_svc_active)
7428                         return;
7429         }
7430 
7431         /* Check if we need to run worker_mgmt */
7432         if (ddi_get_lbolt() > clks->worker_delay) {
7433                 stmf_worker_mgmt();
7434                 clks->worker_delay = ddi_get_lbolt() +
7435                     stmf_worker_mgmt_delay;
7436         }
7437 
7438         /* Check if any active session got its 1st LUN */
7439         if (stmf_state.stmf_process_initial_luns) {
7440                 int stmf_level = 0;
7441                 int port_level;
7442 
7443                 for (ilport = stmf_state.stmf_ilportlist; ilport;
7444                     ilport = next_ilport) {
7445                         int ilport_lock_held;
7446                         next_ilport = ilport->ilport_next;
7447 
7448                         if ((ilport->ilport_flags &
7449                             ILPORT_SS_GOT_INITIAL_LUNS) == 0)
7450                                 continue;
7451 
7452                         port_level = 0;
7453                         rw_enter(&ilport->ilport_lock, RW_READER);
7454                         ilport_lock_held = 1;
7455 
7456                         for (iss = ilport->ilport_ss_list; iss;
7457                             iss = iss->iss_next) {
7458                                 if ((iss->iss_flags &
7459                                     ISS_GOT_INITIAL_LUNS) == 0)
7460                                         continue;
7461 
7462                                 port_level++;
7463                                 stmf_level++;
7464                                 atomic_and_32(&iss->iss_flags,
7465                                     ~ISS_GOT_INITIAL_LUNS);
7466                                 atomic_or_32(&iss->iss_flags,
7467                                     ISS_EVENT_ACTIVE);
7468                                 rw_exit(&ilport->ilport_lock);
7469                                 ilport_lock_held = 0;
7470                                 mutex_exit(&stmf_state.stmf_lock);
7471                                 stmf_generate_lport_event(ilport,
7472                                     LPORT_EVENT_INITIAL_LUN_MAPPED,
7473                                     iss->iss_ss, 0);
7474                                 atomic_and_32(&iss->iss_flags,
7475                                     ~ISS_EVENT_ACTIVE);
7476                                 mutex_enter(&stmf_state.stmf_lock);
7477                                 /*
7478                                  * scan all the ilports again as the
7479                                  * ilport list might have changed.
7480                                  */
7481                                 next_ilport = stmf_state.stmf_ilportlist;
7482                                 break;
7483                         }
7484 
7485                         if (port_level == 0)
7486                                 atomic_and_32(&ilport->ilport_flags,
7487                                     ~ILPORT_SS_GOT_INITIAL_LUNS);
7488                         /* drop the lock if we are holding it. */
7489                         if (ilport_lock_held == 1)
7490                                 rw_exit(&ilport->ilport_lock);
7491 
7492                         /* Max 4 session at a time */
7493                         if (stmf_level >= 4)
7494                                 break;
7495                 }
7496 
7497                 if (stmf_level == 0)
7498                         stmf_state.stmf_process_initial_luns = 0;
7499         }
7500 
7501         stmf_state.stmf_svc_flags &= ~STMF_SVC_ACTIVE;
7502         (void) cv_reltimedwait(&stmf_state.stmf_cv,
7503             &stmf_state.stmf_lock, td, TR_CLOCK_TICK);
7504         stmf_state.stmf_svc_flags |= STMF_SVC_ACTIVE;
7505 }
7506 
7507 /*
7508  * Waits for ongoing I/O tasks to finish on an LU in preparation for
7509  * the LU's offlining. The LU should already be in an Offlining state
7510  * (otherwise I/O to the LU might never end). There is an additional
7511  * enforcement of this via a deadman timer check.
7512  */
7513 static void
7514 stmf_wait_ilu_tasks_finish(stmf_i_lu_t *ilu)
7515 {
7516         clock_t start, now, deadline;
7517 
7518         start = now = ddi_get_lbolt();
7519         deadline = start + drv_usectohz(stmf_io_deadman * 1000000llu);
7520         mutex_enter(&ilu->ilu_task_lock);
7521         while (ilu->ilu_ntasks != ilu->ilu_ntasks_free) {
7522                 (void) cv_timedwait(&ilu->ilu_offline_pending_cv,
7523                     &ilu->ilu_task_lock, deadline);
7524                 now = ddi_get_lbolt();
7525                 if (now > deadline) {
7526                         if (stmf_io_deadman_enabled) {
7527                                 cmn_err(CE_PANIC, "stmf_svc: I/O deadman hit "
7528                                     "on STMF_CMD_LU_OFFLINE after %d seconds",
7529                                     stmf_io_deadman);
7530                         } else {
7531                                 /* keep on spinning */
7532                                 deadline = now + drv_usectohz(stmf_io_deadman *
7533                                     1000000llu);
7534                         }
7535                 }
7536         }
7537         mutex_exit(&ilu->ilu_task_lock);
7538         DTRACE_PROBE1(deadman__timeout__wait, clock_t, now - start);
7539 }
7540 
7541 void
7542 stmf_svc_queue(int cmd, void *obj, stmf_state_change_info_t *info)
7543 {
7544         stmf_svc_req_t *req;
7545         int s;
7546 
7547         ASSERT(!mutex_owned(&stmf_state.stmf_lock));
7548         s = sizeof (stmf_svc_req_t);
7549         if (info->st_additional_info) {
7550                 s += strlen(info->st_additional_info) + 1;
7551         }
7552         req = kmem_zalloc(s, KM_SLEEP);
7553 
7554         req->svc_cmd = cmd;
7555         req->svc_obj = obj;
7556         req->svc_info.st_rflags = info->st_rflags;
7557         if (info->st_additional_info) {
7558                 req->svc_info.st_additional_info = (char *)(GET_BYTE_OFFSET(req,
7559                     sizeof (stmf_svc_req_t)));
7560                 (void) strcpy(req->svc_info.st_additional_info,
7561                     info->st_additional_info);
7562         }
7563         req->svc_req_alloc_size = s;
7564         req->svc_next = NULL;
7565 
7566         mutex_enter(&stmf_state.stmf_lock);
7567         *stmf_state.stmf_svc_tailp = req;
7568         stmf_state.stmf_svc_tailp = &req->svc_next;
7569         if ((stmf_state.stmf_svc_flags & STMF_SVC_ACTIVE) == 0) {
7570                 cv_signal(&stmf_state.stmf_cv);
7571         }
7572         mutex_exit(&stmf_state.stmf_lock);
7573 }
7574 
7575 static void
7576 stmf_svc_kill_obj_requests(void *obj)
7577 {
7578         stmf_svc_req_t *prev_req = NULL;
7579         stmf_svc_req_t *next_req;
7580         stmf_svc_req_t *req;
7581 
7582         ASSERT(mutex_owned(&stmf_state.stmf_lock));
7583 
7584         for (req = stmf_state.stmf_svc_active; req != NULL; req = next_req) {
7585                 next_req = req->svc_next;
7586 
7587                 if (req->svc_obj == obj) {
7588                         if (prev_req != NULL)
7589                                 prev_req->svc_next = next_req;
7590                         else
7591                                 stmf_state.stmf_svc_active = next_req;
7592 
7593                         if (next_req == NULL)
7594                                 stmf_state.stmf_svc_tailp = (prev_req != NULL) ?
7595                                     &prev_req->svc_next :
7596                                     &stmf_state.stmf_svc_active;
7597 
7598                         kmem_free(req, req->svc_req_alloc_size);
7599                 } else {
7600                         prev_req = req;
7601                 }
7602         }
7603 }
7604 
7605 void
7606 stmf_trace(caddr_t ident, const char *fmt, ...)
7607 {
7608         va_list args;
7609         char tbuf[160];
7610         int len;
7611 
7612         if (!stmf_trace_on)
7613                 return;
7614         len = snprintf(tbuf, 158, "%s:%07lu: ", ident ? ident : "",
7615             ddi_get_lbolt());
7616         va_start(args, fmt);
7617         len += vsnprintf(tbuf + len, 158 - len, fmt, args);
7618         va_end(args);
7619 
7620         if (len > 158) {
7621                 len = 158;
7622         }
7623         tbuf[len++] = '\n';
7624         tbuf[len] = 0;
7625 
7626         mutex_enter(&trace_buf_lock);
7627         bcopy(tbuf, &stmf_trace_buf[trace_buf_curndx], len+1);
7628         trace_buf_curndx += len;
7629         if (trace_buf_curndx > (trace_buf_size - 320))
7630                 trace_buf_curndx = 0;
7631         mutex_exit(&trace_buf_lock);
7632 }
7633 
7634 void
7635 stmf_trace_clear()
7636 {
7637         if (!stmf_trace_on)
7638                 return;
7639         mutex_enter(&trace_buf_lock);
7640         trace_buf_curndx = 0;
7641         if (trace_buf_size > 0)
7642                 stmf_trace_buf[0] = 0;
7643         mutex_exit(&trace_buf_lock);
7644 }
7645 
7646 static void
7647 stmf_abort_task_offline(scsi_task_t *task, int offline_lu, char *info)
7648 {
7649         stmf_state_change_info_t        change_info;
7650         void                            *ctl_private;
7651         uint32_t                        ctl_cmd;
7652         int                             msg = 0;
7653 
7654         stmf_trace("FROM STMF", "abort_task_offline called for %s: %s",
7655             offline_lu ? "LU" : "LPORT", info ? info : "no additional info");
7656         change_info.st_additional_info = info;
7657         if (offline_lu) {
7658                 change_info.st_rflags = STMF_RFLAG_RESET |
7659                     STMF_RFLAG_LU_ABORT;
7660                 ctl_private = task->task_lu;
7661                 if (((stmf_i_lu_t *)
7662                     task->task_lu->lu_stmf_private)->ilu_state ==
7663                     STMF_STATE_ONLINE) {
7664                         msg = 1;
7665                 }
7666                 ctl_cmd = STMF_CMD_LU_OFFLINE;
7667         } else {
7668                 change_info.st_rflags = STMF_RFLAG_RESET |
7669                     STMF_RFLAG_LPORT_ABORT;
7670                 ctl_private = task->task_lport;
7671                 if (((stmf_i_local_port_t *)
7672                     task->task_lport->lport_stmf_private)->ilport_state ==
7673                     STMF_STATE_ONLINE) {
7674                         msg = 1;
7675                 }
7676                 ctl_cmd = STMF_CMD_LPORT_OFFLINE;
7677         }
7678 
7679         if (msg) {
7680                 stmf_trace(0, "Calling stmf_ctl to offline %s : %s",
7681                     offline_lu ? "LU" : "LPORT", info ? info :
7682                     "<no additional info>");
7683         }
7684         (void) stmf_ctl(ctl_cmd, ctl_private, &change_info);
7685 }
7686 
7687 static char
7688 stmf_ctoi(char c)
7689 {
7690         if ((c >= '0') && (c <= '9'))
7691                 c -= '0';
7692         else if ((c >= 'A') && (c <= 'F'))
7693                 c = c - 'A' + 10;
7694         else if ((c >= 'a') && (c <= 'f'))
7695                 c = c - 'a' + 10;
7696         else
7697                 c = -1;
7698         return (c);
7699 }
7700 
7701 /* Convert from Hex value in ASCII format to the equivalent bytes */
7702 static boolean_t
7703 stmf_base16_str_to_binary(char *c, int dplen, uint8_t *dp)
7704 {
7705         int             ii;
7706 
7707         for (ii = 0; ii < dplen; ii++) {
7708                 char nibble1, nibble2;
7709                 char enc_char = *c++;
7710                 nibble1 = stmf_ctoi(enc_char);
7711 
7712                 enc_char = *c++;
7713                 nibble2 = stmf_ctoi(enc_char);
7714                 if (nibble1 == -1 || nibble2 == -1)
7715                         return (B_FALSE);
7716 
7717                 dp[ii] = (nibble1 << 4) | nibble2;
7718         }
7719         return (B_TRUE);
7720 }
7721 
7722 boolean_t
7723 stmf_scsilib_tptid_validate(scsi_transport_id_t *tptid, uint32_t total_sz,
7724                                 uint16_t *tptid_sz)
7725 {
7726         uint16_t tpd_len = SCSI_TPTID_SIZE;
7727 
7728         if (tptid_sz)
7729                 *tptid_sz = 0;
7730         if (total_sz < sizeof (scsi_transport_id_t))
7731                 return (B_FALSE);
7732 
7733         switch (tptid->protocol_id) {
7734 
7735         case PROTOCOL_FIBRE_CHANNEL:
7736                 /* FC Transport ID validation checks. SPC3 rev23, Table 284 */
7737                 if (total_sz < tpd_len || tptid->format_code != 0)
7738                         return (B_FALSE);
7739                 break;
7740 
7741         case PROTOCOL_iSCSI:
7742                 {
7743                 iscsi_transport_id_t    *iscsiid;
7744                 uint16_t                adn_len, name_len;
7745 
7746                 /* Check for valid format code, SPC3 rev 23 Table 288 */
7747                 if ((total_sz < tpd_len) ||
7748                     (tptid->format_code != 0 && tptid->format_code != 1))
7749                         return (B_FALSE);
7750 
7751                 iscsiid = (iscsi_transport_id_t *)tptid;
7752                 adn_len = READ_SCSI16(iscsiid->add_len, uint16_t);
7753                 tpd_len = sizeof (iscsi_transport_id_t) + adn_len - 1;
7754 
7755                 /*
7756                  * iSCSI Transport ID validation checks.
7757                  * As per SPC3 rev 23 Section 7.5.4.6 and Table 289 & Table 290
7758                  */
7759                 if (adn_len < 20 || (adn_len % 4 != 0))
7760                         return (B_FALSE);
7761 
7762                 name_len = strnlen(iscsiid->iscsi_name, adn_len);
7763                 if (name_len == 0 || name_len >= adn_len)
7764                         return (B_FALSE);
7765 
7766                 /* If the format_code is 1 check for ISID seperator */
7767                 if ((tptid->format_code == 1) && (strstr(iscsiid->iscsi_name,
7768                     SCSI_TPTID_ISCSI_ISID_SEPERATOR) == NULL))
7769                         return (B_FALSE);
7770 
7771                 }
7772                 break;
7773 
7774         case PROTOCOL_SRP:
7775                 /* SRP Transport ID validation checks. SPC3 rev23, Table 287 */
7776                 if (total_sz < tpd_len || tptid->format_code != 0)
7777                         return (B_FALSE);
7778                 break;
7779 
7780         case PROTOCOL_PARALLEL_SCSI:
7781         case PROTOCOL_SSA:
7782         case PROTOCOL_IEEE_1394:
7783         case PROTOCOL_SAS:
7784         case PROTOCOL_ADT:
7785         case PROTOCOL_ATAPI:
7786         default:
7787                 {
7788                 stmf_dflt_scsi_tptid_t *dflttpd;
7789 
7790                 tpd_len = sizeof (stmf_dflt_scsi_tptid_t);
7791                 if (total_sz < tpd_len)
7792                         return (B_FALSE);
7793                 dflttpd = (stmf_dflt_scsi_tptid_t *)tptid;
7794                 tpd_len = tpd_len + SCSI_READ16(&dflttpd->ident_len) - 1;
7795                 if (total_sz < tpd_len)
7796                         return (B_FALSE);
7797                 }
7798                 break;
7799         }
7800         if (tptid_sz)
7801                 *tptid_sz = tpd_len;
7802         return (B_TRUE);
7803 }
7804 
7805 boolean_t
7806 stmf_scsilib_tptid_compare(scsi_transport_id_t *tpd1,
7807                                 scsi_transport_id_t *tpd2)
7808 {
7809         if ((tpd1->protocol_id != tpd2->protocol_id) ||
7810             (tpd1->format_code != tpd2->format_code))
7811                 return (B_FALSE);
7812 
7813         switch (tpd1->protocol_id) {
7814 
7815         case PROTOCOL_iSCSI:
7816                 {
7817                 iscsi_transport_id_t *iscsitpd1, *iscsitpd2;
7818                 uint16_t len;
7819 
7820                 iscsitpd1 = (iscsi_transport_id_t *)tpd1;
7821                 iscsitpd2 = (iscsi_transport_id_t *)tpd2;
7822                 len = SCSI_READ16(&iscsitpd1->add_len);
7823                 if ((memcmp(iscsitpd1->add_len, iscsitpd2->add_len, 2) != 0) ||
7824                     (memcmp(iscsitpd1->iscsi_name, iscsitpd2->iscsi_name, len)
7825                     != 0))
7826                         return (B_FALSE);
7827                 }
7828                 break;
7829 
7830         case PROTOCOL_SRP:
7831                 {
7832                 scsi_srp_transport_id_t *srptpd1, *srptpd2;
7833 
7834                 srptpd1 = (scsi_srp_transport_id_t *)tpd1;
7835                 srptpd2 = (scsi_srp_transport_id_t *)tpd2;
7836                 if (memcmp(srptpd1->srp_name, srptpd2->srp_name,
7837                     sizeof (srptpd1->srp_name)) != 0)
7838                         return (B_FALSE);
7839                 }
7840                 break;
7841 
7842         case PROTOCOL_FIBRE_CHANNEL:
7843                 {
7844                 scsi_fc_transport_id_t *fctpd1, *fctpd2;
7845 
7846                 fctpd1 = (scsi_fc_transport_id_t *)tpd1;
7847                 fctpd2 = (scsi_fc_transport_id_t *)tpd2;
7848                 if (memcmp(fctpd1->port_name, fctpd2->port_name,
7849                     sizeof (fctpd1->port_name)) != 0)
7850                         return (B_FALSE);
7851                 }
7852                 break;
7853 
7854         case PROTOCOL_PARALLEL_SCSI:
7855         case PROTOCOL_SSA:
7856         case PROTOCOL_IEEE_1394:
7857         case PROTOCOL_SAS:
7858         case PROTOCOL_ADT:
7859         case PROTOCOL_ATAPI:
7860         default:
7861                 {
7862                 stmf_dflt_scsi_tptid_t *dflt1, *dflt2;
7863                 uint16_t len;
7864 
7865                 dflt1 = (stmf_dflt_scsi_tptid_t *)tpd1;
7866                 dflt2 = (stmf_dflt_scsi_tptid_t *)tpd2;
7867                 len = SCSI_READ16(&dflt1->ident_len);
7868                 if ((memcmp(dflt1->ident_len, dflt2->ident_len, 2) != 0) ||
7869                     (memcmp(dflt1->ident, dflt2->ident, len) != 0))
7870                         return (B_FALSE);
7871                 }
7872                 break;
7873         }
7874         return (B_TRUE);
7875 }
7876 
7877 /*
7878  * Changes devid_desc to corresponding TransportID format
7879  * Returns :- pointer to stmf_remote_port_t
7880  * Note    :- Allocates continous memory for stmf_remote_port_t and TransportID,
7881  *            This memory need to be freed when this remote_port is no longer
7882  *            used.
7883  */
7884 stmf_remote_port_t *
7885 stmf_scsilib_devid_to_remote_port(scsi_devid_desc_t *devid)
7886 {
7887         struct scsi_fc_transport_id     *fc_tpd;
7888         struct iscsi_transport_id       *iscsi_tpd;
7889         struct scsi_srp_transport_id    *srp_tpd;
7890         struct stmf_dflt_scsi_tptid     *dflt_tpd;
7891         uint16_t ident_len,  sz = 0;
7892         stmf_remote_port_t *rpt = NULL;
7893 
7894         ident_len = devid->ident_length;
7895         ASSERT(ident_len);
7896         switch (devid->protocol_id) {
7897         case PROTOCOL_FIBRE_CHANNEL:
7898                 sz = sizeof (scsi_fc_transport_id_t);
7899                 rpt = stmf_remote_port_alloc(sz);
7900                 rpt->rport_tptid->format_code = 0;
7901                 rpt->rport_tptid->protocol_id = devid->protocol_id;
7902                 fc_tpd = (scsi_fc_transport_id_t *)rpt->rport_tptid;
7903                 /*
7904                  * convert from "wwn.xxxxxxxxxxxxxxxx" to 8-byte binary
7905                  * skip first 4 byte for "wwn."
7906                  */
7907                 ASSERT(strncmp("wwn.", (char *)devid->ident, 4) == 0);
7908                 if ((ident_len < SCSI_TPTID_FC_PORT_NAME_SIZE * 2 + 4) ||
7909                     !stmf_base16_str_to_binary((char *)devid->ident + 4,
7910                     SCSI_TPTID_FC_PORT_NAME_SIZE, fc_tpd->port_name))
7911                         goto devid_to_remote_port_fail;
7912                 break;
7913 
7914         case PROTOCOL_iSCSI:
7915                 sz = ALIGNED_TO_8BYTE_BOUNDARY(sizeof (iscsi_transport_id_t) +
7916                     ident_len - 1);
7917                 rpt = stmf_remote_port_alloc(sz);
7918                 rpt->rport_tptid->format_code = 0;
7919                 rpt->rport_tptid->protocol_id = devid->protocol_id;
7920                 iscsi_tpd = (iscsi_transport_id_t *)rpt->rport_tptid;
7921                 SCSI_WRITE16(iscsi_tpd->add_len, ident_len);
7922                 (void) memcpy(iscsi_tpd->iscsi_name, devid->ident, ident_len);
7923                 break;
7924 
7925         case PROTOCOL_SRP:
7926                 sz = sizeof (scsi_srp_transport_id_t);
7927                 rpt = stmf_remote_port_alloc(sz);
7928                 rpt->rport_tptid->format_code = 0;
7929                 rpt->rport_tptid->protocol_id = devid->protocol_id;
7930                 srp_tpd = (scsi_srp_transport_id_t *)rpt->rport_tptid;
7931                 /*
7932                  * convert from "eui.xxxxxxxxxxxxxxx" to 8-byte binary
7933                  * skip first 4 byte for "eui."
7934                  * Assume 8-byte initiator-extension part of srp_name is NOT
7935                  * stored in devid and hence will be set as zero
7936                  */
7937                 ASSERT(strncmp("eui.", (char *)devid->ident, 4) == 0);
7938                 if ((ident_len < (SCSI_TPTID_SRP_PORT_NAME_LEN - 8) * 2 + 4) ||
7939                     !stmf_base16_str_to_binary((char *)devid->ident+4,
7940                     SCSI_TPTID_SRP_PORT_NAME_LEN, srp_tpd->srp_name))
7941                         goto devid_to_remote_port_fail;
7942                 break;
7943 
7944         case PROTOCOL_PARALLEL_SCSI:
7945         case PROTOCOL_SSA:
7946         case PROTOCOL_IEEE_1394:
7947         case PROTOCOL_SAS:
7948         case PROTOCOL_ADT:
7949         case PROTOCOL_ATAPI:
7950         default :
7951                 ident_len = devid->ident_length;
7952                 sz = ALIGNED_TO_8BYTE_BOUNDARY(sizeof (stmf_dflt_scsi_tptid_t) +
7953                     ident_len - 1);
7954                 rpt = stmf_remote_port_alloc(sz);
7955                 rpt->rport_tptid->format_code = 0;
7956                 rpt->rport_tptid->protocol_id = devid->protocol_id;
7957                 dflt_tpd = (stmf_dflt_scsi_tptid_t *)rpt->rport_tptid;
7958                 SCSI_WRITE16(dflt_tpd->ident_len, ident_len);
7959                 (void) memcpy(dflt_tpd->ident, devid->ident, ident_len);
7960                 break;
7961         }
7962         return (rpt);
7963 
7964 devid_to_remote_port_fail:
7965         stmf_remote_port_free(rpt);
7966         return (NULL);
7967 
7968 }
7969 
7970 stmf_remote_port_t *
7971 stmf_remote_port_alloc(uint16_t tptid_sz) {
7972         stmf_remote_port_t *rpt;
7973         rpt = (stmf_remote_port_t *)kmem_zalloc(
7974             sizeof (stmf_remote_port_t) + tptid_sz, KM_SLEEP);
7975         rpt->rport_tptid_sz = tptid_sz;
7976         rpt->rport_tptid = (scsi_transport_id_t *)(rpt + 1);
7977         return (rpt);
7978 }
7979 
7980 void
7981 stmf_remote_port_free(stmf_remote_port_t *rpt)
7982 {
7983         /*
7984          * Note: stmf_scsilib_devid_to_remote_port() function allocates
7985          *      remote port structures for all transports in the same way, So
7986          *      it is safe to deallocate it in a protocol independent manner.
7987          *      If any of the allocation method changes, corresponding changes
7988          *      need to be made here too.
7989          */
7990         kmem_free(rpt, sizeof (stmf_remote_port_t) + rpt->rport_tptid_sz);
7991 }