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patch fix-bad-code
patch as-lock-macro-simplification
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--- old/usr/src/uts/common/os/zone.c
+++ new/usr/src/uts/common/os/zone.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 24 * Copyright 2013, Joyent Inc. All rights reserved.
25 25 */
26 26
27 27 /*
28 28 * Zones
29 29 *
30 30 * A zone is a named collection of processes, namespace constraints,
31 31 * and other system resources which comprise a secure and manageable
32 32 * application containment facility.
33 33 *
34 34 * Zones (represented by the reference counted zone_t) are tracked in
35 35 * the kernel in the zonehash. Elsewhere in the kernel, Zone IDs
36 36 * (zoneid_t) are used to track zone association. Zone IDs are
37 37 * dynamically generated when the zone is created; if a persistent
38 38 * identifier is needed (core files, accounting logs, audit trail,
39 39 * etc.), the zone name should be used.
40 40 *
41 41 *
42 42 * Global Zone:
43 43 *
44 44 * The global zone (zoneid 0) is automatically associated with all
45 45 * system resources that have not been bound to a user-created zone.
46 46 * This means that even systems where zones are not in active use
47 47 * have a global zone, and all processes, mounts, etc. are
48 48 * associated with that zone. The global zone is generally
49 49 * unconstrained in terms of privileges and access, though the usual
50 50 * credential and privilege based restrictions apply.
51 51 *
52 52 *
53 53 * Zone States:
54 54 *
55 55 * The states in which a zone may be in and the transitions are as
56 56 * follows:
57 57 *
58 58 * ZONE_IS_UNINITIALIZED: primordial state for a zone. The partially
59 59 * initialized zone is added to the list of active zones on the system but
60 60 * isn't accessible.
61 61 *
62 62 * ZONE_IS_INITIALIZED: Initialization complete except the ZSD callbacks are
63 63 * not yet completed. Not possible to enter the zone, but attributes can
64 64 * be retrieved.
65 65 *
66 66 * ZONE_IS_READY: zsched (the kernel dummy process for a zone) is
67 67 * ready. The zone is made visible after the ZSD constructor callbacks are
68 68 * executed. A zone remains in this state until it transitions into
69 69 * the ZONE_IS_BOOTING state as a result of a call to zone_boot().
70 70 *
71 71 * ZONE_IS_BOOTING: in this shortlived-state, zsched attempts to start
72 72 * init. Should that fail, the zone proceeds to the ZONE_IS_SHUTTING_DOWN
73 73 * state.
74 74 *
75 75 * ZONE_IS_RUNNING: The zone is open for business: zsched has
76 76 * successfully started init. A zone remains in this state until
77 77 * zone_shutdown() is called.
78 78 *
79 79 * ZONE_IS_SHUTTING_DOWN: zone_shutdown() has been called, the system is
80 80 * killing all processes running in the zone. The zone remains
81 81 * in this state until there are no more user processes running in the zone.
82 82 * zone_create(), zone_enter(), and zone_destroy() on this zone will fail.
83 83 * Since zone_shutdown() is restartable, it may be called successfully
84 84 * multiple times for the same zone_t. Setting of the zone's state to
85 85 * ZONE_IS_SHUTTING_DOWN is synchronized with mounts, so VOP_MOUNT() may check
86 86 * the zone's status without worrying about it being a moving target.
87 87 *
88 88 * ZONE_IS_EMPTY: zone_shutdown() has been called, and there
89 89 * are no more user processes in the zone. The zone remains in this
90 90 * state until there are no more kernel threads associated with the
91 91 * zone. zone_create(), zone_enter(), and zone_destroy() on this zone will
92 92 * fail.
93 93 *
94 94 * ZONE_IS_DOWN: All kernel threads doing work on behalf of the zone
95 95 * have exited. zone_shutdown() returns. Henceforth it is not possible to
96 96 * join the zone or create kernel threads therein.
97 97 *
98 98 * ZONE_IS_DYING: zone_destroy() has been called on the zone; zone
99 99 * remains in this state until zsched exits. Calls to zone_find_by_*()
100 100 * return NULL from now on.
101 101 *
102 102 * ZONE_IS_DEAD: zsched has exited (zone_ntasks == 0). There are no
103 103 * processes or threads doing work on behalf of the zone. The zone is
104 104 * removed from the list of active zones. zone_destroy() returns, and
105 105 * the zone can be recreated.
106 106 *
107 107 * ZONE_IS_FREE (internal state): zone_ref goes to 0, ZSD destructor
108 108 * callbacks are executed, and all memory associated with the zone is
109 109 * freed.
110 110 *
111 111 * Threads can wait for the zone to enter a requested state by using
112 112 * zone_status_wait() or zone_status_timedwait() with the desired
113 113 * state passed in as an argument. Zone state transitions are
114 114 * uni-directional; it is not possible to move back to an earlier state.
115 115 *
116 116 *
117 117 * Zone-Specific Data:
118 118 *
119 119 * Subsystems needing to maintain zone-specific data can store that
120 120 * data using the ZSD mechanism. This provides a zone-specific data
121 121 * store, similar to thread-specific data (see pthread_getspecific(3C)
122 122 * or the TSD code in uts/common/disp/thread.c. Also, ZSD can be used
123 123 * to register callbacks to be invoked when a zone is created, shut
124 124 * down, or destroyed. This can be used to initialize zone-specific
125 125 * data for new zones and to clean up when zones go away.
126 126 *
127 127 *
128 128 * Data Structures:
129 129 *
130 130 * The per-zone structure (zone_t) is reference counted, and freed
131 131 * when all references are released. zone_hold and zone_rele can be
132 132 * used to adjust the reference count. In addition, reference counts
133 133 * associated with the cred_t structure are tracked separately using
134 134 * zone_cred_hold and zone_cred_rele.
135 135 *
136 136 * Pointers to active zone_t's are stored in two hash tables; one
137 137 * for searching by id, the other for searching by name. Lookups
138 138 * can be performed on either basis, using zone_find_by_id and
139 139 * zone_find_by_name. Both return zone_t pointers with the zone
140 140 * held, so zone_rele should be called when the pointer is no longer
141 141 * needed. Zones can also be searched by path; zone_find_by_path
142 142 * returns the zone with which a path name is associated (global
143 143 * zone if the path is not within some other zone's file system
144 144 * hierarchy). This currently requires iterating through each zone,
145 145 * so it is slower than an id or name search via a hash table.
146 146 *
147 147 *
148 148 * Locking:
149 149 *
150 150 * zonehash_lock: This is a top-level global lock used to protect the
151 151 * zone hash tables and lists. Zones cannot be created or destroyed
152 152 * while this lock is held.
153 153 * zone_status_lock: This is a global lock protecting zone state.
154 154 * Zones cannot change state while this lock is held. It also
155 155 * protects the list of kernel threads associated with a zone.
156 156 * zone_lock: This is a per-zone lock used to protect several fields of
157 157 * the zone_t (see <sys/zone.h> for details). In addition, holding
158 158 * this lock means that the zone cannot go away.
159 159 * zone_nlwps_lock: This is a per-zone lock used to protect the fields
160 160 * related to the zone.max-lwps rctl.
161 161 * zone_mem_lock: This is a per-zone lock used to protect the fields
162 162 * related to the zone.max-locked-memory and zone.max-swap rctls.
163 163 * zone_rctl_lock: This is a per-zone lock used to protect other rctls,
164 164 * currently just max_lofi
165 165 * zsd_key_lock: This is a global lock protecting the key state for ZSD.
166 166 * zone_deathrow_lock: This is a global lock protecting the "deathrow"
167 167 * list (a list of zones in the ZONE_IS_DEAD state).
168 168 *
169 169 * Ordering requirements:
170 170 * pool_lock --> cpu_lock --> zonehash_lock --> zone_status_lock -->
171 171 * zone_lock --> zsd_key_lock --> pidlock --> p_lock
172 172 *
173 173 * When taking zone_mem_lock or zone_nlwps_lock, the lock ordering is:
174 174 * zonehash_lock --> a_lock --> pidlock --> p_lock --> zone_mem_lock
175 175 * zonehash_lock --> a_lock --> pidlock --> p_lock --> zone_nlwps_lock
176 176 *
177 177 * Blocking memory allocations are permitted while holding any of the
178 178 * zone locks.
179 179 *
180 180 *
181 181 * System Call Interface:
182 182 *
183 183 * The zone subsystem can be managed and queried from user level with
184 184 * the following system calls (all subcodes of the primary "zone"
185 185 * system call):
186 186 * - zone_create: creates a zone with selected attributes (name,
187 187 * root path, privileges, resource controls, ZFS datasets)
188 188 * - zone_enter: allows the current process to enter a zone
189 189 * - zone_getattr: reports attributes of a zone
190 190 * - zone_setattr: set attributes of a zone
191 191 * - zone_boot: set 'init' running for the zone
192 192 * - zone_list: lists all zones active in the system
193 193 * - zone_lookup: looks up zone id based on name
194 194 * - zone_shutdown: initiates shutdown process (see states above)
195 195 * - zone_destroy: completes shutdown process (see states above)
196 196 *
197 197 */
198 198
199 199 #include <sys/priv_impl.h>
200 200 #include <sys/cred.h>
201 201 #include <c2/audit.h>
202 202 #include <sys/debug.h>
203 203 #include <sys/file.h>
204 204 #include <sys/kmem.h>
205 205 #include <sys/kstat.h>
206 206 #include <sys/mutex.h>
207 207 #include <sys/note.h>
208 208 #include <sys/pathname.h>
209 209 #include <sys/proc.h>
210 210 #include <sys/project.h>
211 211 #include <sys/sysevent.h>
212 212 #include <sys/task.h>
213 213 #include <sys/systm.h>
214 214 #include <sys/types.h>
215 215 #include <sys/utsname.h>
216 216 #include <sys/vnode.h>
217 217 #include <sys/vfs.h>
218 218 #include <sys/systeminfo.h>
219 219 #include <sys/policy.h>
220 220 #include <sys/cred_impl.h>
221 221 #include <sys/contract_impl.h>
222 222 #include <sys/contract/process_impl.h>
223 223 #include <sys/class.h>
224 224 #include <sys/pool.h>
225 225 #include <sys/pool_pset.h>
226 226 #include <sys/pset.h>
227 227 #include <sys/strlog.h>
228 228 #include <sys/sysmacros.h>
229 229 #include <sys/callb.h>
230 230 #include <sys/vmparam.h>
231 231 #include <sys/corectl.h>
232 232 #include <sys/ipc_impl.h>
233 233 #include <sys/klpd.h>
234 234
235 235 #include <sys/door.h>
236 236 #include <sys/cpuvar.h>
237 237 #include <sys/sdt.h>
238 238
239 239 #include <sys/uadmin.h>
240 240 #include <sys/session.h>
241 241 #include <sys/cmn_err.h>
242 242 #include <sys/modhash.h>
243 243 #include <sys/sunddi.h>
244 244 #include <sys/nvpair.h>
245 245 #include <sys/rctl.h>
246 246 #include <sys/fss.h>
247 247 #include <sys/brand.h>
248 248 #include <sys/zone.h>
249 249 #include <net/if.h>
250 250 #include <sys/cpucaps.h>
251 251 #include <vm/seg.h>
252 252 #include <sys/mac.h>
253 253
254 254 /*
255 255 * This constant specifies the number of seconds that threads waiting for
256 256 * subsystems to release a zone's general-purpose references will wait before
257 257 * they log the zone's reference counts. The constant's value shouldn't
258 258 * be so small that reference counts are unnecessarily reported for zones
259 259 * whose references are slowly released. On the other hand, it shouldn't be so
260 260 * large that users reboot their systems out of frustration over hung zones
261 261 * before the system logs the zones' reference counts.
262 262 */
263 263 #define ZONE_DESTROY_TIMEOUT_SECS 60
264 264
265 265 /* List of data link IDs which are accessible from the zone */
266 266 typedef struct zone_dl {
267 267 datalink_id_t zdl_id;
268 268 nvlist_t *zdl_net;
269 269 list_node_t zdl_linkage;
270 270 } zone_dl_t;
271 271
272 272 /*
273 273 * cv used to signal that all references to the zone have been released. This
274 274 * needs to be global since there may be multiple waiters, and the first to
275 275 * wake up will free the zone_t, hence we cannot use zone->zone_cv.
276 276 */
277 277 static kcondvar_t zone_destroy_cv;
278 278 /*
279 279 * Lock used to serialize access to zone_cv. This could have been per-zone,
280 280 * but then we'd need another lock for zone_destroy_cv, and why bother?
281 281 */
282 282 static kmutex_t zone_status_lock;
283 283
284 284 /*
285 285 * ZSD-related global variables.
286 286 */
287 287 static kmutex_t zsd_key_lock; /* protects the following two */
288 288 /*
289 289 * The next caller of zone_key_create() will be assigned a key of ++zsd_keyval.
290 290 */
291 291 static zone_key_t zsd_keyval = 0;
292 292 /*
293 293 * Global list of registered keys. We use this when a new zone is created.
294 294 */
295 295 static list_t zsd_registered_keys;
296 296
297 297 int zone_hash_size = 256;
298 298 static mod_hash_t *zonehashbyname, *zonehashbyid, *zonehashbylabel;
299 299 static kmutex_t zonehash_lock;
300 300 static uint_t zonecount;
301 301 static id_space_t *zoneid_space;
302 302
303 303 /*
304 304 * The global zone (aka zone0) is the all-seeing, all-knowing zone in which the
305 305 * kernel proper runs, and which manages all other zones.
306 306 *
307 307 * Although not declared as static, the variable "zone0" should not be used
308 308 * except for by code that needs to reference the global zone early on in boot,
309 309 * before it is fully initialized. All other consumers should use
310 310 * 'global_zone'.
311 311 */
312 312 zone_t zone0;
313 313 zone_t *global_zone = NULL; /* Set when the global zone is initialized */
314 314
315 315 /*
316 316 * List of active zones, protected by zonehash_lock.
317 317 */
318 318 static list_t zone_active;
319 319
320 320 /*
321 321 * List of destroyed zones that still have outstanding cred references.
322 322 * Used for debugging. Uses a separate lock to avoid lock ordering
323 323 * problems in zone_free.
324 324 */
325 325 static list_t zone_deathrow;
326 326 static kmutex_t zone_deathrow_lock;
327 327
328 328 /* number of zones is limited by virtual interface limit in IP */
329 329 uint_t maxzones = 8192;
330 330
331 331 /* Event channel to sent zone state change notifications */
332 332 evchan_t *zone_event_chan;
333 333
334 334 /*
335 335 * This table holds the mapping from kernel zone states to
336 336 * states visible in the state notification API.
337 337 * The idea is that we only expose "obvious" states and
338 338 * do not expose states which are just implementation details.
339 339 */
340 340 const char *zone_status_table[] = {
341 341 ZONE_EVENT_UNINITIALIZED, /* uninitialized */
342 342 ZONE_EVENT_INITIALIZED, /* initialized */
343 343 ZONE_EVENT_READY, /* ready */
344 344 ZONE_EVENT_READY, /* booting */
345 345 ZONE_EVENT_RUNNING, /* running */
346 346 ZONE_EVENT_SHUTTING_DOWN, /* shutting_down */
347 347 ZONE_EVENT_SHUTTING_DOWN, /* empty */
348 348 ZONE_EVENT_SHUTTING_DOWN, /* down */
349 349 ZONE_EVENT_SHUTTING_DOWN, /* dying */
350 350 ZONE_EVENT_UNINITIALIZED, /* dead */
351 351 };
352 352
353 353 /*
354 354 * This array contains the names of the subsystems listed in zone_ref_subsys_t
355 355 * (see sys/zone.h).
356 356 */
357 357 static char *zone_ref_subsys_names[] = {
358 358 "NFS", /* ZONE_REF_NFS */
359 359 "NFSv4", /* ZONE_REF_NFSV4 */
360 360 "SMBFS", /* ZONE_REF_SMBFS */
361 361 "MNTFS", /* ZONE_REF_MNTFS */
362 362 "LOFI", /* ZONE_REF_LOFI */
363 363 "VFS", /* ZONE_REF_VFS */
364 364 "IPC" /* ZONE_REF_IPC */
365 365 };
366 366
367 367 /*
368 368 * This isn't static so lint doesn't complain.
369 369 */
370 370 rctl_hndl_t rc_zone_cpu_shares;
371 371 rctl_hndl_t rc_zone_locked_mem;
372 372 rctl_hndl_t rc_zone_max_swap;
373 373 rctl_hndl_t rc_zone_max_lofi;
374 374 rctl_hndl_t rc_zone_cpu_cap;
375 375 rctl_hndl_t rc_zone_nlwps;
376 376 rctl_hndl_t rc_zone_nprocs;
377 377 rctl_hndl_t rc_zone_shmmax;
378 378 rctl_hndl_t rc_zone_shmmni;
379 379 rctl_hndl_t rc_zone_semmni;
380 380 rctl_hndl_t rc_zone_msgmni;
381 381
382 382 const char * const zone_default_initname = "/sbin/init";
383 383 static char * const zone_prefix = "/zone/";
384 384 static int zone_shutdown(zoneid_t zoneid);
385 385 static int zone_add_datalink(zoneid_t, datalink_id_t);
386 386 static int zone_remove_datalink(zoneid_t, datalink_id_t);
387 387 static int zone_list_datalink(zoneid_t, int *, datalink_id_t *);
388 388 static int zone_set_network(zoneid_t, zone_net_data_t *);
389 389 static int zone_get_network(zoneid_t, zone_net_data_t *);
390 390
391 391 typedef boolean_t zsd_applyfn_t(kmutex_t *, boolean_t, zone_t *, zone_key_t);
392 392
393 393 static void zsd_apply_all_zones(zsd_applyfn_t *, zone_key_t);
394 394 static void zsd_apply_all_keys(zsd_applyfn_t *, zone_t *);
395 395 static boolean_t zsd_apply_create(kmutex_t *, boolean_t, zone_t *, zone_key_t);
396 396 static boolean_t zsd_apply_shutdown(kmutex_t *, boolean_t, zone_t *,
397 397 zone_key_t);
398 398 static boolean_t zsd_apply_destroy(kmutex_t *, boolean_t, zone_t *, zone_key_t);
399 399 static boolean_t zsd_wait_for_creator(zone_t *, struct zsd_entry *,
400 400 kmutex_t *);
401 401 static boolean_t zsd_wait_for_inprogress(zone_t *, struct zsd_entry *,
402 402 kmutex_t *);
403 403
404 404 /*
405 405 * Bump this number when you alter the zone syscall interfaces; this is
406 406 * because we need to have support for previous API versions in libc
407 407 * to support patching; libc calls into the kernel to determine this number.
408 408 *
409 409 * Version 1 of the API is the version originally shipped with Solaris 10
410 410 * Version 2 alters the zone_create system call in order to support more
411 411 * arguments by moving the args into a structure; and to do better
412 412 * error reporting when zone_create() fails.
413 413 * Version 3 alters the zone_create system call in order to support the
414 414 * import of ZFS datasets to zones.
415 415 * Version 4 alters the zone_create system call in order to support
416 416 * Trusted Extensions.
417 417 * Version 5 alters the zone_boot system call, and converts its old
418 418 * bootargs parameter to be set by the zone_setattr API instead.
419 419 * Version 6 adds the flag argument to zone_create.
420 420 */
421 421 static const int ZONE_SYSCALL_API_VERSION = 6;
422 422
423 423 /*
424 424 * Certain filesystems (such as NFS and autofs) need to know which zone
425 425 * the mount is being placed in. Because of this, we need to be able to
426 426 * ensure that a zone isn't in the process of being created/destroyed such
427 427 * that nfs_mount() thinks it is in the global/NGZ zone, while by the time
428 428 * it gets added the list of mounted zones, it ends up on the wrong zone's
429 429 * mount list. Since a zone can't reside on an NFS file system, we don't
430 430 * have to worry about the zonepath itself.
431 431 *
432 432 * The following functions: block_mounts()/resume_mounts() and
433 433 * mount_in_progress()/mount_completed() are used by zones and the VFS
434 434 * layer (respectively) to synchronize zone state transitions and new
435 435 * mounts within a zone. This syncronization is on a per-zone basis, so
436 436 * activity for one zone will not interfere with activity for another zone.
437 437 *
438 438 * The semantics are like a reader-reader lock such that there may
439 439 * either be multiple mounts (or zone state transitions, if that weren't
440 440 * serialized by zonehash_lock) in progress at the same time, but not
441 441 * both.
442 442 *
443 443 * We use cv's so the user can ctrl-C out of the operation if it's
444 444 * taking too long.
445 445 *
446 446 * The semantics are such that there is unfair bias towards the
447 447 * "current" operation. This means that zone halt may starve if
448 448 * there is a rapid succession of new mounts coming in to the zone.
449 449 */
450 450 /*
451 451 * Prevent new mounts from progressing to the point of calling
452 452 * VFS_MOUNT(). If there are already mounts in this "region", wait for
453 453 * them to complete.
454 454 */
455 455 static int
456 456 block_mounts(zone_t *zp)
457 457 {
458 458 int retval = 0;
459 459
460 460 /*
461 461 * Since it may block for a long time, block_mounts() shouldn't be
462 462 * called with zonehash_lock held.
463 463 */
464 464 ASSERT(MUTEX_NOT_HELD(&zonehash_lock));
465 465 mutex_enter(&zp->zone_mount_lock);
466 466 while (zp->zone_mounts_in_progress > 0) {
467 467 if (cv_wait_sig(&zp->zone_mount_cv, &zp->zone_mount_lock) == 0)
468 468 goto signaled;
469 469 }
470 470 /*
471 471 * A negative value of mounts_in_progress indicates that mounts
472 472 * have been blocked by (-mounts_in_progress) different callers
473 473 * (remotely possible if two threads enter zone_shutdown at the same
474 474 * time).
475 475 */
476 476 zp->zone_mounts_in_progress--;
477 477 retval = 1;
478 478 signaled:
479 479 mutex_exit(&zp->zone_mount_lock);
480 480 return (retval);
481 481 }
482 482
483 483 /*
484 484 * The VFS layer may progress with new mounts as far as we're concerned.
485 485 * Allow them to progress if we were the last obstacle.
486 486 */
487 487 static void
488 488 resume_mounts(zone_t *zp)
489 489 {
490 490 mutex_enter(&zp->zone_mount_lock);
491 491 if (++zp->zone_mounts_in_progress == 0)
492 492 cv_broadcast(&zp->zone_mount_cv);
493 493 mutex_exit(&zp->zone_mount_lock);
494 494 }
495 495
496 496 /*
497 497 * The VFS layer is busy with a mount; this zone should wait until all
498 498 * of its mounts are completed to progress.
499 499 */
500 500 void
501 501 mount_in_progress(zone_t *zp)
502 502 {
503 503 mutex_enter(&zp->zone_mount_lock);
504 504 while (zp->zone_mounts_in_progress < 0)
505 505 cv_wait(&zp->zone_mount_cv, &zp->zone_mount_lock);
506 506 zp->zone_mounts_in_progress++;
507 507 mutex_exit(&zp->zone_mount_lock);
508 508 }
509 509
510 510 /*
511 511 * VFS is done with one mount; wake up any waiting block_mounts()
512 512 * callers if this is the last mount.
513 513 */
514 514 void
515 515 mount_completed(zone_t *zp)
516 516 {
517 517 mutex_enter(&zp->zone_mount_lock);
518 518 if (--zp->zone_mounts_in_progress == 0)
519 519 cv_broadcast(&zp->zone_mount_cv);
520 520 mutex_exit(&zp->zone_mount_lock);
521 521 }
522 522
523 523 /*
524 524 * ZSD routines.
525 525 *
526 526 * Zone Specific Data (ZSD) is modeled after Thread Specific Data as
527 527 * defined by the pthread_key_create() and related interfaces.
528 528 *
529 529 * Kernel subsystems may register one or more data items and/or
530 530 * callbacks to be executed when a zone is created, shutdown, or
531 531 * destroyed.
532 532 *
533 533 * Unlike the thread counterpart, destructor callbacks will be executed
534 534 * even if the data pointer is NULL and/or there are no constructor
535 535 * callbacks, so it is the responsibility of such callbacks to check for
536 536 * NULL data values if necessary.
537 537 *
538 538 * The locking strategy and overall picture is as follows:
539 539 *
540 540 * When someone calls zone_key_create(), a template ZSD entry is added to the
541 541 * global list "zsd_registered_keys", protected by zsd_key_lock. While
542 542 * holding that lock all the existing zones are marked as
543 543 * ZSD_CREATE_NEEDED and a copy of the ZSD entry added to the per-zone
544 544 * zone_zsd list (protected by zone_lock). The global list is updated first
545 545 * (under zone_key_lock) to make sure that newly created zones use the
546 546 * most recent list of keys. Then under zonehash_lock we walk the zones
547 547 * and mark them. Similar locking is used in zone_key_delete().
548 548 *
549 549 * The actual create, shutdown, and destroy callbacks are done without
550 550 * holding any lock. And zsd_flags are used to ensure that the operations
551 551 * completed so that when zone_key_create (and zone_create) is done, as well as
552 552 * zone_key_delete (and zone_destroy) is done, all the necessary callbacks
553 553 * are completed.
554 554 *
555 555 * When new zones are created constructor callbacks for all registered ZSD
556 556 * entries will be called. That also uses the above two phases of marking
557 557 * what needs to be done, and then running the callbacks without holding
558 558 * any locks.
559 559 *
560 560 * The framework does not provide any locking around zone_getspecific() and
561 561 * zone_setspecific() apart from that needed for internal consistency, so
562 562 * callers interested in atomic "test-and-set" semantics will need to provide
563 563 * their own locking.
564 564 */
565 565
566 566 /*
567 567 * Helper function to find the zsd_entry associated with the key in the
568 568 * given list.
569 569 */
570 570 static struct zsd_entry *
571 571 zsd_find(list_t *l, zone_key_t key)
572 572 {
573 573 struct zsd_entry *zsd;
574 574
575 575 for (zsd = list_head(l); zsd != NULL; zsd = list_next(l, zsd)) {
576 576 if (zsd->zsd_key == key) {
577 577 return (zsd);
578 578 }
579 579 }
580 580 return (NULL);
581 581 }
582 582
583 583 /*
584 584 * Helper function to find the zsd_entry associated with the key in the
585 585 * given list. Move it to the front of the list.
586 586 */
587 587 static struct zsd_entry *
588 588 zsd_find_mru(list_t *l, zone_key_t key)
589 589 {
590 590 struct zsd_entry *zsd;
591 591
592 592 for (zsd = list_head(l); zsd != NULL; zsd = list_next(l, zsd)) {
593 593 if (zsd->zsd_key == key) {
594 594 /*
595 595 * Move to head of list to keep list in MRU order.
596 596 */
597 597 if (zsd != list_head(l)) {
598 598 list_remove(l, zsd);
599 599 list_insert_head(l, zsd);
600 600 }
601 601 return (zsd);
602 602 }
603 603 }
604 604 return (NULL);
605 605 }
606 606
607 607 void
608 608 zone_key_create(zone_key_t *keyp, void *(*create)(zoneid_t),
609 609 void (*shutdown)(zoneid_t, void *), void (*destroy)(zoneid_t, void *))
610 610 {
611 611 struct zsd_entry *zsdp;
612 612 struct zsd_entry *t;
613 613 struct zone *zone;
614 614 zone_key_t key;
615 615
616 616 zsdp = kmem_zalloc(sizeof (*zsdp), KM_SLEEP);
617 617 zsdp->zsd_data = NULL;
618 618 zsdp->zsd_create = create;
619 619 zsdp->zsd_shutdown = shutdown;
620 620 zsdp->zsd_destroy = destroy;
621 621
622 622 /*
623 623 * Insert in global list of callbacks. Makes future zone creations
624 624 * see it.
625 625 */
626 626 mutex_enter(&zsd_key_lock);
627 627 key = zsdp->zsd_key = ++zsd_keyval;
628 628 ASSERT(zsd_keyval != 0);
629 629 list_insert_tail(&zsd_registered_keys, zsdp);
630 630 mutex_exit(&zsd_key_lock);
631 631
632 632 /*
633 633 * Insert for all existing zones and mark them as needing
634 634 * a create callback.
635 635 */
636 636 mutex_enter(&zonehash_lock); /* stop the world */
637 637 for (zone = list_head(&zone_active); zone != NULL;
638 638 zone = list_next(&zone_active, zone)) {
639 639 zone_status_t status;
640 640
641 641 mutex_enter(&zone->zone_lock);
642 642
643 643 /* Skip zones that are on the way down or not yet up */
644 644 status = zone_status_get(zone);
645 645 if (status >= ZONE_IS_DOWN ||
646 646 status == ZONE_IS_UNINITIALIZED) {
647 647 mutex_exit(&zone->zone_lock);
648 648 continue;
649 649 }
650 650
651 651 t = zsd_find_mru(&zone->zone_zsd, key);
652 652 if (t != NULL) {
653 653 /*
654 654 * A zsd_configure already inserted it after
655 655 * we dropped zsd_key_lock above.
656 656 */
657 657 mutex_exit(&zone->zone_lock);
658 658 continue;
659 659 }
660 660 t = kmem_zalloc(sizeof (*t), KM_SLEEP);
661 661 t->zsd_key = key;
662 662 t->zsd_create = create;
663 663 t->zsd_shutdown = shutdown;
664 664 t->zsd_destroy = destroy;
665 665 if (create != NULL) {
666 666 t->zsd_flags = ZSD_CREATE_NEEDED;
667 667 DTRACE_PROBE2(zsd__create__needed,
668 668 zone_t *, zone, zone_key_t, key);
669 669 }
670 670 list_insert_tail(&zone->zone_zsd, t);
671 671 mutex_exit(&zone->zone_lock);
672 672 }
673 673 mutex_exit(&zonehash_lock);
674 674
675 675 if (create != NULL) {
676 676 /* Now call the create callback for this key */
677 677 zsd_apply_all_zones(zsd_apply_create, key);
678 678 }
679 679 /*
680 680 * It is safe for consumers to use the key now, make it
681 681 * globally visible. Specifically zone_getspecific() will
682 682 * always successfully return the zone specific data associated
683 683 * with the key.
684 684 */
685 685 *keyp = key;
686 686
687 687 }
688 688
689 689 /*
690 690 * Function called when a module is being unloaded, or otherwise wishes
691 691 * to unregister its ZSD key and callbacks.
692 692 *
693 693 * Remove from the global list and determine the functions that need to
694 694 * be called under a global lock. Then call the functions without
695 695 * holding any locks. Finally free up the zone_zsd entries. (The apply
696 696 * functions need to access the zone_zsd entries to find zsd_data etc.)
697 697 */
698 698 int
699 699 zone_key_delete(zone_key_t key)
700 700 {
701 701 struct zsd_entry *zsdp = NULL;
702 702 zone_t *zone;
703 703
704 704 mutex_enter(&zsd_key_lock);
705 705 zsdp = zsd_find_mru(&zsd_registered_keys, key);
706 706 if (zsdp == NULL) {
707 707 mutex_exit(&zsd_key_lock);
708 708 return (-1);
709 709 }
710 710 list_remove(&zsd_registered_keys, zsdp);
711 711 mutex_exit(&zsd_key_lock);
712 712
713 713 mutex_enter(&zonehash_lock);
714 714 for (zone = list_head(&zone_active); zone != NULL;
715 715 zone = list_next(&zone_active, zone)) {
716 716 struct zsd_entry *del;
717 717
718 718 mutex_enter(&zone->zone_lock);
719 719 del = zsd_find_mru(&zone->zone_zsd, key);
720 720 if (del == NULL) {
721 721 /*
722 722 * Somebody else got here first e.g the zone going
723 723 * away.
724 724 */
725 725 mutex_exit(&zone->zone_lock);
726 726 continue;
727 727 }
728 728 ASSERT(del->zsd_shutdown == zsdp->zsd_shutdown);
729 729 ASSERT(del->zsd_destroy == zsdp->zsd_destroy);
730 730 if (del->zsd_shutdown != NULL &&
731 731 (del->zsd_flags & ZSD_SHUTDOWN_ALL) == 0) {
732 732 del->zsd_flags |= ZSD_SHUTDOWN_NEEDED;
733 733 DTRACE_PROBE2(zsd__shutdown__needed,
734 734 zone_t *, zone, zone_key_t, key);
735 735 }
736 736 if (del->zsd_destroy != NULL &&
737 737 (del->zsd_flags & ZSD_DESTROY_ALL) == 0) {
738 738 del->zsd_flags |= ZSD_DESTROY_NEEDED;
739 739 DTRACE_PROBE2(zsd__destroy__needed,
740 740 zone_t *, zone, zone_key_t, key);
741 741 }
742 742 mutex_exit(&zone->zone_lock);
743 743 }
744 744 mutex_exit(&zonehash_lock);
745 745 kmem_free(zsdp, sizeof (*zsdp));
746 746
747 747 /* Now call the shutdown and destroy callback for this key */
748 748 zsd_apply_all_zones(zsd_apply_shutdown, key);
749 749 zsd_apply_all_zones(zsd_apply_destroy, key);
750 750
751 751 /* Now we can free up the zsdp structures in each zone */
752 752 mutex_enter(&zonehash_lock);
753 753 for (zone = list_head(&zone_active); zone != NULL;
754 754 zone = list_next(&zone_active, zone)) {
755 755 struct zsd_entry *del;
756 756
757 757 mutex_enter(&zone->zone_lock);
758 758 del = zsd_find(&zone->zone_zsd, key);
759 759 if (del != NULL) {
760 760 list_remove(&zone->zone_zsd, del);
761 761 ASSERT(!(del->zsd_flags & ZSD_ALL_INPROGRESS));
762 762 kmem_free(del, sizeof (*del));
763 763 }
764 764 mutex_exit(&zone->zone_lock);
765 765 }
766 766 mutex_exit(&zonehash_lock);
767 767
768 768 return (0);
769 769 }
770 770
771 771 /*
772 772 * ZSD counterpart of pthread_setspecific().
773 773 *
774 774 * Since all zsd callbacks, including those with no create function,
775 775 * have an entry in zone_zsd, if the key is registered it is part of
776 776 * the zone_zsd list.
777 777 * Return an error if the key wasn't registerd.
778 778 */
779 779 int
780 780 zone_setspecific(zone_key_t key, zone_t *zone, const void *data)
781 781 {
782 782 struct zsd_entry *t;
783 783
784 784 mutex_enter(&zone->zone_lock);
785 785 t = zsd_find_mru(&zone->zone_zsd, key);
786 786 if (t != NULL) {
787 787 /*
788 788 * Replace old value with new
789 789 */
790 790 t->zsd_data = (void *)data;
791 791 mutex_exit(&zone->zone_lock);
792 792 return (0);
793 793 }
794 794 mutex_exit(&zone->zone_lock);
795 795 return (-1);
796 796 }
797 797
798 798 /*
799 799 * ZSD counterpart of pthread_getspecific().
800 800 */
801 801 void *
802 802 zone_getspecific(zone_key_t key, zone_t *zone)
803 803 {
804 804 struct zsd_entry *t;
805 805 void *data;
806 806
807 807 mutex_enter(&zone->zone_lock);
808 808 t = zsd_find_mru(&zone->zone_zsd, key);
809 809 data = (t == NULL ? NULL : t->zsd_data);
810 810 mutex_exit(&zone->zone_lock);
811 811 return (data);
812 812 }
813 813
814 814 /*
815 815 * Function used to initialize a zone's list of ZSD callbacks and data
816 816 * when the zone is being created. The callbacks are initialized from
817 817 * the template list (zsd_registered_keys). The constructor callback is
818 818 * executed later (once the zone exists and with locks dropped).
819 819 */
820 820 static void
821 821 zone_zsd_configure(zone_t *zone)
822 822 {
823 823 struct zsd_entry *zsdp;
824 824 struct zsd_entry *t;
825 825
826 826 ASSERT(MUTEX_HELD(&zonehash_lock));
827 827 ASSERT(list_head(&zone->zone_zsd) == NULL);
828 828 mutex_enter(&zone->zone_lock);
829 829 mutex_enter(&zsd_key_lock);
830 830 for (zsdp = list_head(&zsd_registered_keys); zsdp != NULL;
831 831 zsdp = list_next(&zsd_registered_keys, zsdp)) {
832 832 /*
833 833 * Since this zone is ZONE_IS_UNCONFIGURED, zone_key_create
834 834 * should not have added anything to it.
835 835 */
836 836 ASSERT(zsd_find(&zone->zone_zsd, zsdp->zsd_key) == NULL);
837 837
838 838 t = kmem_zalloc(sizeof (*t), KM_SLEEP);
839 839 t->zsd_key = zsdp->zsd_key;
840 840 t->zsd_create = zsdp->zsd_create;
841 841 t->zsd_shutdown = zsdp->zsd_shutdown;
842 842 t->zsd_destroy = zsdp->zsd_destroy;
843 843 if (zsdp->zsd_create != NULL) {
844 844 t->zsd_flags = ZSD_CREATE_NEEDED;
845 845 DTRACE_PROBE2(zsd__create__needed,
846 846 zone_t *, zone, zone_key_t, zsdp->zsd_key);
847 847 }
848 848 list_insert_tail(&zone->zone_zsd, t);
849 849 }
850 850 mutex_exit(&zsd_key_lock);
851 851 mutex_exit(&zone->zone_lock);
852 852 }
853 853
854 854 enum zsd_callback_type { ZSD_CREATE, ZSD_SHUTDOWN, ZSD_DESTROY };
855 855
856 856 /*
857 857 * Helper function to execute shutdown or destructor callbacks.
858 858 */
859 859 static void
860 860 zone_zsd_callbacks(zone_t *zone, enum zsd_callback_type ct)
861 861 {
862 862 struct zsd_entry *t;
863 863
864 864 ASSERT(ct == ZSD_SHUTDOWN || ct == ZSD_DESTROY);
865 865 ASSERT(ct != ZSD_SHUTDOWN || zone_status_get(zone) >= ZONE_IS_EMPTY);
866 866 ASSERT(ct != ZSD_DESTROY || zone_status_get(zone) >= ZONE_IS_DOWN);
867 867
868 868 /*
869 869 * Run the callback solely based on what is registered for the zone
870 870 * in zone_zsd. The global list can change independently of this
871 871 * as keys are registered and unregistered and we don't register new
872 872 * callbacks for a zone that is in the process of going away.
873 873 */
874 874 mutex_enter(&zone->zone_lock);
875 875 for (t = list_head(&zone->zone_zsd); t != NULL;
876 876 t = list_next(&zone->zone_zsd, t)) {
877 877 zone_key_t key = t->zsd_key;
878 878
879 879 /* Skip if no callbacks registered */
880 880
881 881 if (ct == ZSD_SHUTDOWN) {
882 882 if (t->zsd_shutdown != NULL &&
883 883 (t->zsd_flags & ZSD_SHUTDOWN_ALL) == 0) {
884 884 t->zsd_flags |= ZSD_SHUTDOWN_NEEDED;
885 885 DTRACE_PROBE2(zsd__shutdown__needed,
886 886 zone_t *, zone, zone_key_t, key);
887 887 }
888 888 } else {
889 889 if (t->zsd_destroy != NULL &&
890 890 (t->zsd_flags & ZSD_DESTROY_ALL) == 0) {
891 891 t->zsd_flags |= ZSD_DESTROY_NEEDED;
892 892 DTRACE_PROBE2(zsd__destroy__needed,
893 893 zone_t *, zone, zone_key_t, key);
894 894 }
895 895 }
896 896 }
897 897 mutex_exit(&zone->zone_lock);
898 898
899 899 /* Now call the shutdown and destroy callback for this key */
900 900 zsd_apply_all_keys(zsd_apply_shutdown, zone);
901 901 zsd_apply_all_keys(zsd_apply_destroy, zone);
902 902
903 903 }
904 904
905 905 /*
906 906 * Called when the zone is going away; free ZSD-related memory, and
907 907 * destroy the zone_zsd list.
908 908 */
909 909 static void
910 910 zone_free_zsd(zone_t *zone)
911 911 {
912 912 struct zsd_entry *t, *next;
913 913
914 914 /*
915 915 * Free all the zsd_entry's we had on this zone.
916 916 */
917 917 mutex_enter(&zone->zone_lock);
918 918 for (t = list_head(&zone->zone_zsd); t != NULL; t = next) {
919 919 next = list_next(&zone->zone_zsd, t);
920 920 list_remove(&zone->zone_zsd, t);
921 921 ASSERT(!(t->zsd_flags & ZSD_ALL_INPROGRESS));
922 922 kmem_free(t, sizeof (*t));
923 923 }
924 924 list_destroy(&zone->zone_zsd);
925 925 mutex_exit(&zone->zone_lock);
926 926
927 927 }
928 928
929 929 /*
930 930 * Apply a function to all zones for particular key value.
931 931 *
932 932 * The applyfn has to drop zonehash_lock if it does some work, and
933 933 * then reacquire it before it returns.
934 934 * When the lock is dropped we don't follow list_next even
935 935 * if it is possible to do so without any hazards. This is
936 936 * because we want the design to allow for the list of zones
937 937 * to change in any arbitrary way during the time the
938 938 * lock was dropped.
939 939 *
940 940 * It is safe to restart the loop at list_head since the applyfn
941 941 * changes the zsd_flags as it does work, so a subsequent
942 942 * pass through will have no effect in applyfn, hence the loop will terminate
943 943 * in at worst O(N^2).
944 944 */
945 945 static void
946 946 zsd_apply_all_zones(zsd_applyfn_t *applyfn, zone_key_t key)
947 947 {
948 948 zone_t *zone;
949 949
950 950 mutex_enter(&zonehash_lock);
951 951 zone = list_head(&zone_active);
952 952 while (zone != NULL) {
953 953 if ((applyfn)(&zonehash_lock, B_FALSE, zone, key)) {
954 954 /* Lock dropped - restart at head */
955 955 zone = list_head(&zone_active);
956 956 } else {
957 957 zone = list_next(&zone_active, zone);
958 958 }
959 959 }
960 960 mutex_exit(&zonehash_lock);
961 961 }
962 962
963 963 /*
964 964 * Apply a function to all keys for a particular zone.
965 965 *
966 966 * The applyfn has to drop zonehash_lock if it does some work, and
967 967 * then reacquire it before it returns.
968 968 * When the lock is dropped we don't follow list_next even
969 969 * if it is possible to do so without any hazards. This is
970 970 * because we want the design to allow for the list of zsd callbacks
971 971 * to change in any arbitrary way during the time the
972 972 * lock was dropped.
973 973 *
974 974 * It is safe to restart the loop at list_head since the applyfn
975 975 * changes the zsd_flags as it does work, so a subsequent
976 976 * pass through will have no effect in applyfn, hence the loop will terminate
977 977 * in at worst O(N^2).
978 978 */
979 979 static void
980 980 zsd_apply_all_keys(zsd_applyfn_t *applyfn, zone_t *zone)
981 981 {
982 982 struct zsd_entry *t;
983 983
984 984 mutex_enter(&zone->zone_lock);
985 985 t = list_head(&zone->zone_zsd);
986 986 while (t != NULL) {
987 987 if ((applyfn)(NULL, B_TRUE, zone, t->zsd_key)) {
988 988 /* Lock dropped - restart at head */
989 989 t = list_head(&zone->zone_zsd);
990 990 } else {
991 991 t = list_next(&zone->zone_zsd, t);
992 992 }
993 993 }
994 994 mutex_exit(&zone->zone_lock);
995 995 }
996 996
997 997 /*
998 998 * Call the create function for the zone and key if CREATE_NEEDED
999 999 * is set.
1000 1000 * If some other thread gets here first and sets CREATE_INPROGRESS, then
1001 1001 * we wait for that thread to complete so that we can ensure that
1002 1002 * all the callbacks are done when we've looped over all zones/keys.
1003 1003 *
1004 1004 * When we call the create function, we drop the global held by the
1005 1005 * caller, and return true to tell the caller it needs to re-evalute the
1006 1006 * state.
1007 1007 * If the caller holds zone_lock then zone_lock_held is set, and zone_lock
1008 1008 * remains held on exit.
1009 1009 */
1010 1010 static boolean_t
1011 1011 zsd_apply_create(kmutex_t *lockp, boolean_t zone_lock_held,
1012 1012 zone_t *zone, zone_key_t key)
1013 1013 {
1014 1014 void *result;
1015 1015 struct zsd_entry *t;
1016 1016 boolean_t dropped;
1017 1017
1018 1018 if (lockp != NULL) {
1019 1019 ASSERT(MUTEX_HELD(lockp));
1020 1020 }
1021 1021 if (zone_lock_held) {
1022 1022 ASSERT(MUTEX_HELD(&zone->zone_lock));
1023 1023 } else {
1024 1024 mutex_enter(&zone->zone_lock);
1025 1025 }
1026 1026
1027 1027 t = zsd_find(&zone->zone_zsd, key);
1028 1028 if (t == NULL) {
1029 1029 /*
1030 1030 * Somebody else got here first e.g the zone going
1031 1031 * away.
1032 1032 */
1033 1033 if (!zone_lock_held)
1034 1034 mutex_exit(&zone->zone_lock);
1035 1035 return (B_FALSE);
1036 1036 }
1037 1037 dropped = B_FALSE;
1038 1038 if (zsd_wait_for_inprogress(zone, t, lockp))
1039 1039 dropped = B_TRUE;
1040 1040
1041 1041 if (t->zsd_flags & ZSD_CREATE_NEEDED) {
1042 1042 t->zsd_flags &= ~ZSD_CREATE_NEEDED;
1043 1043 t->zsd_flags |= ZSD_CREATE_INPROGRESS;
1044 1044 DTRACE_PROBE2(zsd__create__inprogress,
1045 1045 zone_t *, zone, zone_key_t, key);
1046 1046 mutex_exit(&zone->zone_lock);
1047 1047 if (lockp != NULL)
1048 1048 mutex_exit(lockp);
1049 1049
1050 1050 dropped = B_TRUE;
1051 1051 ASSERT(t->zsd_create != NULL);
1052 1052 DTRACE_PROBE2(zsd__create__start,
1053 1053 zone_t *, zone, zone_key_t, key);
1054 1054
1055 1055 result = (*t->zsd_create)(zone->zone_id);
1056 1056
1057 1057 DTRACE_PROBE2(zsd__create__end,
1058 1058 zone_t *, zone, voidn *, result);
1059 1059
1060 1060 ASSERT(result != NULL);
1061 1061 if (lockp != NULL)
1062 1062 mutex_enter(lockp);
1063 1063 mutex_enter(&zone->zone_lock);
1064 1064 t->zsd_data = result;
1065 1065 t->zsd_flags &= ~ZSD_CREATE_INPROGRESS;
1066 1066 t->zsd_flags |= ZSD_CREATE_COMPLETED;
1067 1067 cv_broadcast(&t->zsd_cv);
1068 1068 DTRACE_PROBE2(zsd__create__completed,
1069 1069 zone_t *, zone, zone_key_t, key);
1070 1070 }
1071 1071 if (!zone_lock_held)
1072 1072 mutex_exit(&zone->zone_lock);
1073 1073 return (dropped);
1074 1074 }
1075 1075
1076 1076 /*
1077 1077 * Call the shutdown function for the zone and key if SHUTDOWN_NEEDED
1078 1078 * is set.
1079 1079 * If some other thread gets here first and sets *_INPROGRESS, then
1080 1080 * we wait for that thread to complete so that we can ensure that
1081 1081 * all the callbacks are done when we've looped over all zones/keys.
1082 1082 *
1083 1083 * When we call the shutdown function, we drop the global held by the
1084 1084 * caller, and return true to tell the caller it needs to re-evalute the
1085 1085 * state.
1086 1086 * If the caller holds zone_lock then zone_lock_held is set, and zone_lock
1087 1087 * remains held on exit.
1088 1088 */
1089 1089 static boolean_t
1090 1090 zsd_apply_shutdown(kmutex_t *lockp, boolean_t zone_lock_held,
1091 1091 zone_t *zone, zone_key_t key)
1092 1092 {
1093 1093 struct zsd_entry *t;
1094 1094 void *data;
1095 1095 boolean_t dropped;
1096 1096
1097 1097 if (lockp != NULL) {
1098 1098 ASSERT(MUTEX_HELD(lockp));
1099 1099 }
1100 1100 if (zone_lock_held) {
1101 1101 ASSERT(MUTEX_HELD(&zone->zone_lock));
1102 1102 } else {
1103 1103 mutex_enter(&zone->zone_lock);
1104 1104 }
1105 1105
1106 1106 t = zsd_find(&zone->zone_zsd, key);
1107 1107 if (t == NULL) {
1108 1108 /*
1109 1109 * Somebody else got here first e.g the zone going
1110 1110 * away.
1111 1111 */
1112 1112 if (!zone_lock_held)
1113 1113 mutex_exit(&zone->zone_lock);
1114 1114 return (B_FALSE);
1115 1115 }
1116 1116 dropped = B_FALSE;
1117 1117 if (zsd_wait_for_creator(zone, t, lockp))
1118 1118 dropped = B_TRUE;
1119 1119
1120 1120 if (zsd_wait_for_inprogress(zone, t, lockp))
1121 1121 dropped = B_TRUE;
1122 1122
1123 1123 if (t->zsd_flags & ZSD_SHUTDOWN_NEEDED) {
1124 1124 t->zsd_flags &= ~ZSD_SHUTDOWN_NEEDED;
1125 1125 t->zsd_flags |= ZSD_SHUTDOWN_INPROGRESS;
1126 1126 DTRACE_PROBE2(zsd__shutdown__inprogress,
1127 1127 zone_t *, zone, zone_key_t, key);
1128 1128 mutex_exit(&zone->zone_lock);
1129 1129 if (lockp != NULL)
1130 1130 mutex_exit(lockp);
1131 1131 dropped = B_TRUE;
1132 1132
1133 1133 ASSERT(t->zsd_shutdown != NULL);
1134 1134 data = t->zsd_data;
1135 1135
1136 1136 DTRACE_PROBE2(zsd__shutdown__start,
1137 1137 zone_t *, zone, zone_key_t, key);
1138 1138
1139 1139 (t->zsd_shutdown)(zone->zone_id, data);
1140 1140 DTRACE_PROBE2(zsd__shutdown__end,
1141 1141 zone_t *, zone, zone_key_t, key);
1142 1142
1143 1143 if (lockp != NULL)
1144 1144 mutex_enter(lockp);
1145 1145 mutex_enter(&zone->zone_lock);
1146 1146 t->zsd_flags &= ~ZSD_SHUTDOWN_INPROGRESS;
1147 1147 t->zsd_flags |= ZSD_SHUTDOWN_COMPLETED;
1148 1148 cv_broadcast(&t->zsd_cv);
1149 1149 DTRACE_PROBE2(zsd__shutdown__completed,
1150 1150 zone_t *, zone, zone_key_t, key);
1151 1151 }
1152 1152 if (!zone_lock_held)
1153 1153 mutex_exit(&zone->zone_lock);
1154 1154 return (dropped);
1155 1155 }
1156 1156
1157 1157 /*
1158 1158 * Call the destroy function for the zone and key if DESTROY_NEEDED
1159 1159 * is set.
1160 1160 * If some other thread gets here first and sets *_INPROGRESS, then
1161 1161 * we wait for that thread to complete so that we can ensure that
1162 1162 * all the callbacks are done when we've looped over all zones/keys.
1163 1163 *
1164 1164 * When we call the destroy function, we drop the global held by the
1165 1165 * caller, and return true to tell the caller it needs to re-evalute the
1166 1166 * state.
1167 1167 * If the caller holds zone_lock then zone_lock_held is set, and zone_lock
1168 1168 * remains held on exit.
1169 1169 */
1170 1170 static boolean_t
1171 1171 zsd_apply_destroy(kmutex_t *lockp, boolean_t zone_lock_held,
1172 1172 zone_t *zone, zone_key_t key)
1173 1173 {
1174 1174 struct zsd_entry *t;
1175 1175 void *data;
1176 1176 boolean_t dropped;
1177 1177
1178 1178 if (lockp != NULL) {
1179 1179 ASSERT(MUTEX_HELD(lockp));
1180 1180 }
1181 1181 if (zone_lock_held) {
1182 1182 ASSERT(MUTEX_HELD(&zone->zone_lock));
1183 1183 } else {
1184 1184 mutex_enter(&zone->zone_lock);
1185 1185 }
1186 1186
1187 1187 t = zsd_find(&zone->zone_zsd, key);
1188 1188 if (t == NULL) {
1189 1189 /*
1190 1190 * Somebody else got here first e.g the zone going
1191 1191 * away.
1192 1192 */
1193 1193 if (!zone_lock_held)
1194 1194 mutex_exit(&zone->zone_lock);
1195 1195 return (B_FALSE);
1196 1196 }
1197 1197 dropped = B_FALSE;
1198 1198 if (zsd_wait_for_creator(zone, t, lockp))
1199 1199 dropped = B_TRUE;
1200 1200
1201 1201 if (zsd_wait_for_inprogress(zone, t, lockp))
1202 1202 dropped = B_TRUE;
1203 1203
1204 1204 if (t->zsd_flags & ZSD_DESTROY_NEEDED) {
1205 1205 t->zsd_flags &= ~ZSD_DESTROY_NEEDED;
1206 1206 t->zsd_flags |= ZSD_DESTROY_INPROGRESS;
1207 1207 DTRACE_PROBE2(zsd__destroy__inprogress,
1208 1208 zone_t *, zone, zone_key_t, key);
1209 1209 mutex_exit(&zone->zone_lock);
1210 1210 if (lockp != NULL)
1211 1211 mutex_exit(lockp);
1212 1212 dropped = B_TRUE;
1213 1213
1214 1214 ASSERT(t->zsd_destroy != NULL);
1215 1215 data = t->zsd_data;
1216 1216 DTRACE_PROBE2(zsd__destroy__start,
1217 1217 zone_t *, zone, zone_key_t, key);
1218 1218
1219 1219 (t->zsd_destroy)(zone->zone_id, data);
1220 1220 DTRACE_PROBE2(zsd__destroy__end,
1221 1221 zone_t *, zone, zone_key_t, key);
1222 1222
1223 1223 if (lockp != NULL)
1224 1224 mutex_enter(lockp);
1225 1225 mutex_enter(&zone->zone_lock);
1226 1226 t->zsd_data = NULL;
1227 1227 t->zsd_flags &= ~ZSD_DESTROY_INPROGRESS;
1228 1228 t->zsd_flags |= ZSD_DESTROY_COMPLETED;
1229 1229 cv_broadcast(&t->zsd_cv);
1230 1230 DTRACE_PROBE2(zsd__destroy__completed,
1231 1231 zone_t *, zone, zone_key_t, key);
1232 1232 }
1233 1233 if (!zone_lock_held)
1234 1234 mutex_exit(&zone->zone_lock);
1235 1235 return (dropped);
1236 1236 }
1237 1237
1238 1238 /*
1239 1239 * Wait for any CREATE_NEEDED flag to be cleared.
1240 1240 * Returns true if lockp was temporarily dropped while waiting.
1241 1241 */
1242 1242 static boolean_t
1243 1243 zsd_wait_for_creator(zone_t *zone, struct zsd_entry *t, kmutex_t *lockp)
1244 1244 {
1245 1245 boolean_t dropped = B_FALSE;
1246 1246
1247 1247 while (t->zsd_flags & ZSD_CREATE_NEEDED) {
1248 1248 DTRACE_PROBE2(zsd__wait__for__creator,
1249 1249 zone_t *, zone, struct zsd_entry *, t);
1250 1250 if (lockp != NULL) {
1251 1251 dropped = B_TRUE;
1252 1252 mutex_exit(lockp);
1253 1253 }
1254 1254 cv_wait(&t->zsd_cv, &zone->zone_lock);
1255 1255 if (lockp != NULL) {
1256 1256 /* First drop zone_lock to preserve order */
1257 1257 mutex_exit(&zone->zone_lock);
1258 1258 mutex_enter(lockp);
1259 1259 mutex_enter(&zone->zone_lock);
1260 1260 }
1261 1261 }
1262 1262 return (dropped);
1263 1263 }
1264 1264
1265 1265 /*
1266 1266 * Wait for any INPROGRESS flag to be cleared.
1267 1267 * Returns true if lockp was temporarily dropped while waiting.
1268 1268 */
1269 1269 static boolean_t
1270 1270 zsd_wait_for_inprogress(zone_t *zone, struct zsd_entry *t, kmutex_t *lockp)
1271 1271 {
1272 1272 boolean_t dropped = B_FALSE;
1273 1273
1274 1274 while (t->zsd_flags & ZSD_ALL_INPROGRESS) {
1275 1275 DTRACE_PROBE2(zsd__wait__for__inprogress,
1276 1276 zone_t *, zone, struct zsd_entry *, t);
1277 1277 if (lockp != NULL) {
1278 1278 dropped = B_TRUE;
1279 1279 mutex_exit(lockp);
1280 1280 }
1281 1281 cv_wait(&t->zsd_cv, &zone->zone_lock);
1282 1282 if (lockp != NULL) {
1283 1283 /* First drop zone_lock to preserve order */
1284 1284 mutex_exit(&zone->zone_lock);
1285 1285 mutex_enter(lockp);
1286 1286 mutex_enter(&zone->zone_lock);
1287 1287 }
1288 1288 }
1289 1289 return (dropped);
1290 1290 }
1291 1291
1292 1292 /*
1293 1293 * Frees memory associated with the zone dataset list.
1294 1294 */
1295 1295 static void
1296 1296 zone_free_datasets(zone_t *zone)
1297 1297 {
1298 1298 zone_dataset_t *t, *next;
1299 1299
1300 1300 for (t = list_head(&zone->zone_datasets); t != NULL; t = next) {
1301 1301 next = list_next(&zone->zone_datasets, t);
1302 1302 list_remove(&zone->zone_datasets, t);
1303 1303 kmem_free(t->zd_dataset, strlen(t->zd_dataset) + 1);
1304 1304 kmem_free(t, sizeof (*t));
1305 1305 }
1306 1306 list_destroy(&zone->zone_datasets);
1307 1307 }
1308 1308
1309 1309 /*
1310 1310 * zone.cpu-shares resource control support.
1311 1311 */
1312 1312 /*ARGSUSED*/
1313 1313 static rctl_qty_t
1314 1314 zone_cpu_shares_usage(rctl_t *rctl, struct proc *p)
1315 1315 {
1316 1316 ASSERT(MUTEX_HELD(&p->p_lock));
1317 1317 return (p->p_zone->zone_shares);
1318 1318 }
1319 1319
1320 1320 /*ARGSUSED*/
1321 1321 static int
1322 1322 zone_cpu_shares_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e,
1323 1323 rctl_qty_t nv)
1324 1324 {
1325 1325 ASSERT(MUTEX_HELD(&p->p_lock));
1326 1326 ASSERT(e->rcep_t == RCENTITY_ZONE);
1327 1327 if (e->rcep_p.zone == NULL)
1328 1328 return (0);
1329 1329
1330 1330 e->rcep_p.zone->zone_shares = nv;
1331 1331 return (0);
1332 1332 }
1333 1333
1334 1334 static rctl_ops_t zone_cpu_shares_ops = {
1335 1335 rcop_no_action,
1336 1336 zone_cpu_shares_usage,
1337 1337 zone_cpu_shares_set,
1338 1338 rcop_no_test
1339 1339 };
1340 1340
1341 1341 /*
1342 1342 * zone.cpu-cap resource control support.
1343 1343 */
1344 1344 /*ARGSUSED*/
1345 1345 static rctl_qty_t
1346 1346 zone_cpu_cap_get(rctl_t *rctl, struct proc *p)
1347 1347 {
1348 1348 ASSERT(MUTEX_HELD(&p->p_lock));
1349 1349 return (cpucaps_zone_get(p->p_zone));
1350 1350 }
1351 1351
1352 1352 /*ARGSUSED*/
1353 1353 static int
1354 1354 zone_cpu_cap_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e,
1355 1355 rctl_qty_t nv)
1356 1356 {
1357 1357 zone_t *zone = e->rcep_p.zone;
1358 1358
1359 1359 ASSERT(MUTEX_HELD(&p->p_lock));
1360 1360 ASSERT(e->rcep_t == RCENTITY_ZONE);
1361 1361
1362 1362 if (zone == NULL)
1363 1363 return (0);
1364 1364
1365 1365 /*
1366 1366 * set cap to the new value.
1367 1367 */
1368 1368 return (cpucaps_zone_set(zone, nv));
1369 1369 }
1370 1370
1371 1371 static rctl_ops_t zone_cpu_cap_ops = {
1372 1372 rcop_no_action,
1373 1373 zone_cpu_cap_get,
1374 1374 zone_cpu_cap_set,
1375 1375 rcop_no_test
1376 1376 };
1377 1377
1378 1378 /*ARGSUSED*/
1379 1379 static rctl_qty_t
1380 1380 zone_lwps_usage(rctl_t *r, proc_t *p)
1381 1381 {
1382 1382 rctl_qty_t nlwps;
1383 1383 zone_t *zone = p->p_zone;
1384 1384
1385 1385 ASSERT(MUTEX_HELD(&p->p_lock));
1386 1386
1387 1387 mutex_enter(&zone->zone_nlwps_lock);
1388 1388 nlwps = zone->zone_nlwps;
1389 1389 mutex_exit(&zone->zone_nlwps_lock);
1390 1390
1391 1391 return (nlwps);
1392 1392 }
1393 1393
1394 1394 /*ARGSUSED*/
1395 1395 static int
1396 1396 zone_lwps_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rcntl,
1397 1397 rctl_qty_t incr, uint_t flags)
1398 1398 {
1399 1399 rctl_qty_t nlwps;
1400 1400
1401 1401 ASSERT(MUTEX_HELD(&p->p_lock));
1402 1402 ASSERT(e->rcep_t == RCENTITY_ZONE);
1403 1403 if (e->rcep_p.zone == NULL)
1404 1404 return (0);
1405 1405 ASSERT(MUTEX_HELD(&(e->rcep_p.zone->zone_nlwps_lock)));
1406 1406 nlwps = e->rcep_p.zone->zone_nlwps;
1407 1407
1408 1408 if (nlwps + incr > rcntl->rcv_value)
1409 1409 return (1);
1410 1410
1411 1411 return (0);
1412 1412 }
1413 1413
1414 1414 /*ARGSUSED*/
1415 1415 static int
1416 1416 zone_lwps_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e, rctl_qty_t nv)
1417 1417 {
1418 1418 ASSERT(MUTEX_HELD(&p->p_lock));
1419 1419 ASSERT(e->rcep_t == RCENTITY_ZONE);
1420 1420 if (e->rcep_p.zone == NULL)
1421 1421 return (0);
1422 1422 e->rcep_p.zone->zone_nlwps_ctl = nv;
1423 1423 return (0);
1424 1424 }
1425 1425
1426 1426 static rctl_ops_t zone_lwps_ops = {
1427 1427 rcop_no_action,
1428 1428 zone_lwps_usage,
1429 1429 zone_lwps_set,
1430 1430 zone_lwps_test,
1431 1431 };
1432 1432
1433 1433 /*ARGSUSED*/
1434 1434 static rctl_qty_t
1435 1435 zone_procs_usage(rctl_t *r, proc_t *p)
1436 1436 {
1437 1437 rctl_qty_t nprocs;
1438 1438 zone_t *zone = p->p_zone;
1439 1439
1440 1440 ASSERT(MUTEX_HELD(&p->p_lock));
1441 1441
1442 1442 mutex_enter(&zone->zone_nlwps_lock);
1443 1443 nprocs = zone->zone_nprocs;
1444 1444 mutex_exit(&zone->zone_nlwps_lock);
1445 1445
1446 1446 return (nprocs);
1447 1447 }
1448 1448
1449 1449 /*ARGSUSED*/
1450 1450 static int
1451 1451 zone_procs_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rcntl,
1452 1452 rctl_qty_t incr, uint_t flags)
1453 1453 {
1454 1454 rctl_qty_t nprocs;
1455 1455
1456 1456 ASSERT(MUTEX_HELD(&p->p_lock));
1457 1457 ASSERT(e->rcep_t == RCENTITY_ZONE);
1458 1458 if (e->rcep_p.zone == NULL)
1459 1459 return (0);
1460 1460 ASSERT(MUTEX_HELD(&(e->rcep_p.zone->zone_nlwps_lock)));
1461 1461 nprocs = e->rcep_p.zone->zone_nprocs;
1462 1462
1463 1463 if (nprocs + incr > rcntl->rcv_value)
1464 1464 return (1);
1465 1465
1466 1466 return (0);
1467 1467 }
1468 1468
1469 1469 /*ARGSUSED*/
1470 1470 static int
1471 1471 zone_procs_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e, rctl_qty_t nv)
1472 1472 {
1473 1473 ASSERT(MUTEX_HELD(&p->p_lock));
1474 1474 ASSERT(e->rcep_t == RCENTITY_ZONE);
1475 1475 if (e->rcep_p.zone == NULL)
1476 1476 return (0);
1477 1477 e->rcep_p.zone->zone_nprocs_ctl = nv;
1478 1478 return (0);
1479 1479 }
1480 1480
1481 1481 static rctl_ops_t zone_procs_ops = {
1482 1482 rcop_no_action,
1483 1483 zone_procs_usage,
1484 1484 zone_procs_set,
1485 1485 zone_procs_test,
1486 1486 };
1487 1487
1488 1488 /*ARGSUSED*/
1489 1489 static int
1490 1490 zone_shmmax_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rval,
1491 1491 rctl_qty_t incr, uint_t flags)
1492 1492 {
1493 1493 rctl_qty_t v;
1494 1494 ASSERT(MUTEX_HELD(&p->p_lock));
1495 1495 ASSERT(e->rcep_t == RCENTITY_ZONE);
1496 1496 v = e->rcep_p.zone->zone_shmmax + incr;
1497 1497 if (v > rval->rcv_value)
1498 1498 return (1);
1499 1499 return (0);
1500 1500 }
1501 1501
1502 1502 static rctl_ops_t zone_shmmax_ops = {
1503 1503 rcop_no_action,
1504 1504 rcop_no_usage,
1505 1505 rcop_no_set,
1506 1506 zone_shmmax_test
1507 1507 };
1508 1508
1509 1509 /*ARGSUSED*/
1510 1510 static int
1511 1511 zone_shmmni_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rval,
1512 1512 rctl_qty_t incr, uint_t flags)
1513 1513 {
1514 1514 rctl_qty_t v;
1515 1515 ASSERT(MUTEX_HELD(&p->p_lock));
1516 1516 ASSERT(e->rcep_t == RCENTITY_ZONE);
1517 1517 v = e->rcep_p.zone->zone_ipc.ipcq_shmmni + incr;
1518 1518 if (v > rval->rcv_value)
1519 1519 return (1);
1520 1520 return (0);
1521 1521 }
1522 1522
1523 1523 static rctl_ops_t zone_shmmni_ops = {
1524 1524 rcop_no_action,
1525 1525 rcop_no_usage,
1526 1526 rcop_no_set,
1527 1527 zone_shmmni_test
1528 1528 };
1529 1529
1530 1530 /*ARGSUSED*/
1531 1531 static int
1532 1532 zone_semmni_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rval,
1533 1533 rctl_qty_t incr, uint_t flags)
1534 1534 {
1535 1535 rctl_qty_t v;
1536 1536 ASSERT(MUTEX_HELD(&p->p_lock));
1537 1537 ASSERT(e->rcep_t == RCENTITY_ZONE);
1538 1538 v = e->rcep_p.zone->zone_ipc.ipcq_semmni + incr;
1539 1539 if (v > rval->rcv_value)
1540 1540 return (1);
1541 1541 return (0);
1542 1542 }
1543 1543
1544 1544 static rctl_ops_t zone_semmni_ops = {
1545 1545 rcop_no_action,
1546 1546 rcop_no_usage,
1547 1547 rcop_no_set,
1548 1548 zone_semmni_test
1549 1549 };
1550 1550
1551 1551 /*ARGSUSED*/
1552 1552 static int
1553 1553 zone_msgmni_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rval,
1554 1554 rctl_qty_t incr, uint_t flags)
1555 1555 {
1556 1556 rctl_qty_t v;
1557 1557 ASSERT(MUTEX_HELD(&p->p_lock));
1558 1558 ASSERT(e->rcep_t == RCENTITY_ZONE);
1559 1559 v = e->rcep_p.zone->zone_ipc.ipcq_msgmni + incr;
1560 1560 if (v > rval->rcv_value)
1561 1561 return (1);
1562 1562 return (0);
1563 1563 }
1564 1564
1565 1565 static rctl_ops_t zone_msgmni_ops = {
1566 1566 rcop_no_action,
1567 1567 rcop_no_usage,
1568 1568 rcop_no_set,
1569 1569 zone_msgmni_test
1570 1570 };
1571 1571
1572 1572 /*ARGSUSED*/
1573 1573 static rctl_qty_t
1574 1574 zone_locked_mem_usage(rctl_t *rctl, struct proc *p)
1575 1575 {
1576 1576 rctl_qty_t q;
1577 1577 ASSERT(MUTEX_HELD(&p->p_lock));
1578 1578 mutex_enter(&p->p_zone->zone_mem_lock);
1579 1579 q = p->p_zone->zone_locked_mem;
1580 1580 mutex_exit(&p->p_zone->zone_mem_lock);
1581 1581 return (q);
1582 1582 }
1583 1583
1584 1584 /*ARGSUSED*/
1585 1585 static int
1586 1586 zone_locked_mem_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e,
1587 1587 rctl_val_t *rcntl, rctl_qty_t incr, uint_t flags)
1588 1588 {
1589 1589 rctl_qty_t q;
1590 1590 zone_t *z;
1591 1591
1592 1592 z = e->rcep_p.zone;
1593 1593 ASSERT(MUTEX_HELD(&p->p_lock));
1594 1594 ASSERT(MUTEX_HELD(&z->zone_mem_lock));
1595 1595 q = z->zone_locked_mem;
1596 1596 if (q + incr > rcntl->rcv_value)
1597 1597 return (1);
1598 1598 return (0);
1599 1599 }
1600 1600
1601 1601 /*ARGSUSED*/
1602 1602 static int
1603 1603 zone_locked_mem_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e,
1604 1604 rctl_qty_t nv)
1605 1605 {
1606 1606 ASSERT(MUTEX_HELD(&p->p_lock));
1607 1607 ASSERT(e->rcep_t == RCENTITY_ZONE);
1608 1608 if (e->rcep_p.zone == NULL)
1609 1609 return (0);
1610 1610 e->rcep_p.zone->zone_locked_mem_ctl = nv;
1611 1611 return (0);
1612 1612 }
1613 1613
1614 1614 static rctl_ops_t zone_locked_mem_ops = {
1615 1615 rcop_no_action,
1616 1616 zone_locked_mem_usage,
1617 1617 zone_locked_mem_set,
1618 1618 zone_locked_mem_test
1619 1619 };
1620 1620
1621 1621 /*ARGSUSED*/
1622 1622 static rctl_qty_t
1623 1623 zone_max_swap_usage(rctl_t *rctl, struct proc *p)
1624 1624 {
1625 1625 rctl_qty_t q;
1626 1626 zone_t *z = p->p_zone;
1627 1627
1628 1628 ASSERT(MUTEX_HELD(&p->p_lock));
1629 1629 mutex_enter(&z->zone_mem_lock);
1630 1630 q = z->zone_max_swap;
1631 1631 mutex_exit(&z->zone_mem_lock);
1632 1632 return (q);
1633 1633 }
1634 1634
1635 1635 /*ARGSUSED*/
1636 1636 static int
1637 1637 zone_max_swap_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e,
1638 1638 rctl_val_t *rcntl, rctl_qty_t incr, uint_t flags)
1639 1639 {
1640 1640 rctl_qty_t q;
1641 1641 zone_t *z;
1642 1642
1643 1643 z = e->rcep_p.zone;
1644 1644 ASSERT(MUTEX_HELD(&p->p_lock));
1645 1645 ASSERT(MUTEX_HELD(&z->zone_mem_lock));
1646 1646 q = z->zone_max_swap;
1647 1647 if (q + incr > rcntl->rcv_value)
1648 1648 return (1);
1649 1649 return (0);
1650 1650 }
1651 1651
1652 1652 /*ARGSUSED*/
1653 1653 static int
1654 1654 zone_max_swap_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e,
1655 1655 rctl_qty_t nv)
1656 1656 {
1657 1657 ASSERT(MUTEX_HELD(&p->p_lock));
1658 1658 ASSERT(e->rcep_t == RCENTITY_ZONE);
1659 1659 if (e->rcep_p.zone == NULL)
1660 1660 return (0);
1661 1661 e->rcep_p.zone->zone_max_swap_ctl = nv;
1662 1662 return (0);
1663 1663 }
1664 1664
1665 1665 static rctl_ops_t zone_max_swap_ops = {
1666 1666 rcop_no_action,
1667 1667 zone_max_swap_usage,
1668 1668 zone_max_swap_set,
1669 1669 zone_max_swap_test
1670 1670 };
1671 1671
1672 1672 /*ARGSUSED*/
1673 1673 static rctl_qty_t
1674 1674 zone_max_lofi_usage(rctl_t *rctl, struct proc *p)
1675 1675 {
1676 1676 rctl_qty_t q;
1677 1677 zone_t *z = p->p_zone;
1678 1678
1679 1679 ASSERT(MUTEX_HELD(&p->p_lock));
1680 1680 mutex_enter(&z->zone_rctl_lock);
1681 1681 q = z->zone_max_lofi;
1682 1682 mutex_exit(&z->zone_rctl_lock);
1683 1683 return (q);
1684 1684 }
1685 1685
1686 1686 /*ARGSUSED*/
1687 1687 static int
1688 1688 zone_max_lofi_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e,
1689 1689 rctl_val_t *rcntl, rctl_qty_t incr, uint_t flags)
1690 1690 {
1691 1691 rctl_qty_t q;
1692 1692 zone_t *z;
1693 1693
1694 1694 z = e->rcep_p.zone;
1695 1695 ASSERT(MUTEX_HELD(&p->p_lock));
1696 1696 ASSERT(MUTEX_HELD(&z->zone_rctl_lock));
1697 1697 q = z->zone_max_lofi;
1698 1698 if (q + incr > rcntl->rcv_value)
1699 1699 return (1);
1700 1700 return (0);
1701 1701 }
1702 1702
1703 1703 /*ARGSUSED*/
1704 1704 static int
1705 1705 zone_max_lofi_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e,
1706 1706 rctl_qty_t nv)
1707 1707 {
1708 1708 ASSERT(MUTEX_HELD(&p->p_lock));
1709 1709 ASSERT(e->rcep_t == RCENTITY_ZONE);
1710 1710 if (e->rcep_p.zone == NULL)
1711 1711 return (0);
1712 1712 e->rcep_p.zone->zone_max_lofi_ctl = nv;
1713 1713 return (0);
1714 1714 }
1715 1715
1716 1716 static rctl_ops_t zone_max_lofi_ops = {
1717 1717 rcop_no_action,
1718 1718 zone_max_lofi_usage,
1719 1719 zone_max_lofi_set,
1720 1720 zone_max_lofi_test
1721 1721 };
1722 1722
1723 1723 /*
1724 1724 * Helper function to brand the zone with a unique ID.
1725 1725 */
1726 1726 static void
1727 1727 zone_uniqid(zone_t *zone)
1728 1728 {
1729 1729 static uint64_t uniqid = 0;
1730 1730
1731 1731 ASSERT(MUTEX_HELD(&zonehash_lock));
1732 1732 zone->zone_uniqid = uniqid++;
1733 1733 }
1734 1734
1735 1735 /*
1736 1736 * Returns a held pointer to the "kcred" for the specified zone.
1737 1737 */
1738 1738 struct cred *
1739 1739 zone_get_kcred(zoneid_t zoneid)
1740 1740 {
1741 1741 zone_t *zone;
1742 1742 cred_t *cr;
1743 1743
1744 1744 if ((zone = zone_find_by_id(zoneid)) == NULL)
1745 1745 return (NULL);
1746 1746 cr = zone->zone_kcred;
1747 1747 crhold(cr);
1748 1748 zone_rele(zone);
1749 1749 return (cr);
1750 1750 }
1751 1751
1752 1752 static int
1753 1753 zone_lockedmem_kstat_update(kstat_t *ksp, int rw)
1754 1754 {
1755 1755 zone_t *zone = ksp->ks_private;
1756 1756 zone_kstat_t *zk = ksp->ks_data;
1757 1757
1758 1758 if (rw == KSTAT_WRITE)
1759 1759 return (EACCES);
1760 1760
1761 1761 zk->zk_usage.value.ui64 = zone->zone_locked_mem;
1762 1762 zk->zk_value.value.ui64 = zone->zone_locked_mem_ctl;
1763 1763 return (0);
1764 1764 }
1765 1765
1766 1766 static int
1767 1767 zone_nprocs_kstat_update(kstat_t *ksp, int rw)
1768 1768 {
1769 1769 zone_t *zone = ksp->ks_private;
1770 1770 zone_kstat_t *zk = ksp->ks_data;
1771 1771
1772 1772 if (rw == KSTAT_WRITE)
1773 1773 return (EACCES);
1774 1774
1775 1775 zk->zk_usage.value.ui64 = zone->zone_nprocs;
1776 1776 zk->zk_value.value.ui64 = zone->zone_nprocs_ctl;
1777 1777 return (0);
1778 1778 }
1779 1779
1780 1780 static int
1781 1781 zone_swapresv_kstat_update(kstat_t *ksp, int rw)
1782 1782 {
1783 1783 zone_t *zone = ksp->ks_private;
1784 1784 zone_kstat_t *zk = ksp->ks_data;
1785 1785
1786 1786 if (rw == KSTAT_WRITE)
1787 1787 return (EACCES);
1788 1788
1789 1789 zk->zk_usage.value.ui64 = zone->zone_max_swap;
1790 1790 zk->zk_value.value.ui64 = zone->zone_max_swap_ctl;
1791 1791 return (0);
1792 1792 }
1793 1793
1794 1794 static kstat_t *
1795 1795 zone_kstat_create_common(zone_t *zone, char *name,
1796 1796 int (*updatefunc) (kstat_t *, int))
1797 1797 {
1798 1798 kstat_t *ksp;
1799 1799 zone_kstat_t *zk;
1800 1800
1801 1801 ksp = rctl_kstat_create_zone(zone, name, KSTAT_TYPE_NAMED,
1802 1802 sizeof (zone_kstat_t) / sizeof (kstat_named_t),
1803 1803 KSTAT_FLAG_VIRTUAL);
1804 1804
1805 1805 if (ksp == NULL)
1806 1806 return (NULL);
1807 1807
1808 1808 zk = ksp->ks_data = kmem_alloc(sizeof (zone_kstat_t), KM_SLEEP);
1809 1809 ksp->ks_data_size += strlen(zone->zone_name) + 1;
1810 1810 kstat_named_init(&zk->zk_zonename, "zonename", KSTAT_DATA_STRING);
1811 1811 kstat_named_setstr(&zk->zk_zonename, zone->zone_name);
1812 1812 kstat_named_init(&zk->zk_usage, "usage", KSTAT_DATA_UINT64);
1813 1813 kstat_named_init(&zk->zk_value, "value", KSTAT_DATA_UINT64);
1814 1814 ksp->ks_update = updatefunc;
1815 1815 ksp->ks_private = zone;
1816 1816 kstat_install(ksp);
1817 1817 return (ksp);
1818 1818 }
1819 1819
1820 1820 static int
1821 1821 zone_misc_kstat_update(kstat_t *ksp, int rw)
1822 1822 {
1823 1823 zone_t *zone = ksp->ks_private;
1824 1824 zone_misc_kstat_t *zmp = ksp->ks_data;
1825 1825 hrtime_t tmp;
1826 1826
1827 1827 if (rw == KSTAT_WRITE)
1828 1828 return (EACCES);
1829 1829
1830 1830 tmp = zone->zone_utime;
1831 1831 scalehrtime(&tmp);
1832 1832 zmp->zm_utime.value.ui64 = tmp;
1833 1833 tmp = zone->zone_stime;
1834 1834 scalehrtime(&tmp);
1835 1835 zmp->zm_stime.value.ui64 = tmp;
1836 1836 tmp = zone->zone_wtime;
1837 1837 scalehrtime(&tmp);
1838 1838 zmp->zm_wtime.value.ui64 = tmp;
1839 1839
1840 1840 zmp->zm_avenrun1.value.ui32 = zone->zone_avenrun[0];
1841 1841 zmp->zm_avenrun5.value.ui32 = zone->zone_avenrun[1];
1842 1842 zmp->zm_avenrun15.value.ui32 = zone->zone_avenrun[2];
1843 1843
1844 1844 zmp->zm_ffcap.value.ui32 = zone->zone_ffcap;
1845 1845 zmp->zm_ffnoproc.value.ui32 = zone->zone_ffnoproc;
1846 1846 zmp->zm_ffnomem.value.ui32 = zone->zone_ffnomem;
1847 1847 zmp->zm_ffmisc.value.ui32 = zone->zone_ffmisc;
1848 1848
1849 1849 return (0);
1850 1850 }
1851 1851
1852 1852 static kstat_t *
1853 1853 zone_misc_kstat_create(zone_t *zone)
1854 1854 {
1855 1855 kstat_t *ksp;
1856 1856 zone_misc_kstat_t *zmp;
1857 1857
1858 1858 if ((ksp = kstat_create_zone("zones", zone->zone_id,
1859 1859 zone->zone_name, "zone_misc", KSTAT_TYPE_NAMED,
1860 1860 sizeof (zone_misc_kstat_t) / sizeof (kstat_named_t),
1861 1861 KSTAT_FLAG_VIRTUAL, zone->zone_id)) == NULL)
1862 1862 return (NULL);
1863 1863
1864 1864 if (zone->zone_id != GLOBAL_ZONEID)
1865 1865 kstat_zone_add(ksp, GLOBAL_ZONEID);
1866 1866
1867 1867 zmp = ksp->ks_data = kmem_zalloc(sizeof (zone_misc_kstat_t), KM_SLEEP);
1868 1868 ksp->ks_data_size += strlen(zone->zone_name) + 1;
1869 1869 ksp->ks_lock = &zone->zone_misc_lock;
1870 1870 zone->zone_misc_stats = zmp;
1871 1871
1872 1872 /* The kstat "name" field is not large enough for a full zonename */
1873 1873 kstat_named_init(&zmp->zm_zonename, "zonename", KSTAT_DATA_STRING);
1874 1874 kstat_named_setstr(&zmp->zm_zonename, zone->zone_name);
1875 1875 kstat_named_init(&zmp->zm_utime, "nsec_user", KSTAT_DATA_UINT64);
1876 1876 kstat_named_init(&zmp->zm_stime, "nsec_sys", KSTAT_DATA_UINT64);
1877 1877 kstat_named_init(&zmp->zm_wtime, "nsec_waitrq", KSTAT_DATA_UINT64);
1878 1878 kstat_named_init(&zmp->zm_avenrun1, "avenrun_1min", KSTAT_DATA_UINT32);
1879 1879 kstat_named_init(&zmp->zm_avenrun5, "avenrun_5min", KSTAT_DATA_UINT32);
1880 1880 kstat_named_init(&zmp->zm_avenrun15, "avenrun_15min",
1881 1881 KSTAT_DATA_UINT32);
1882 1882 kstat_named_init(&zmp->zm_ffcap, "forkfail_cap", KSTAT_DATA_UINT32);
1883 1883 kstat_named_init(&zmp->zm_ffnoproc, "forkfail_noproc",
1884 1884 KSTAT_DATA_UINT32);
1885 1885 kstat_named_init(&zmp->zm_ffnomem, "forkfail_nomem", KSTAT_DATA_UINT32);
1886 1886 kstat_named_init(&zmp->zm_ffmisc, "forkfail_misc", KSTAT_DATA_UINT32);
1887 1887
1888 1888
1889 1889 ksp->ks_update = zone_misc_kstat_update;
1890 1890 ksp->ks_private = zone;
1891 1891
1892 1892 kstat_install(ksp);
1893 1893 return (ksp);
1894 1894 }
1895 1895
1896 1896 static void
1897 1897 zone_kstat_create(zone_t *zone)
1898 1898 {
1899 1899 zone->zone_lockedmem_kstat = zone_kstat_create_common(zone,
1900 1900 "lockedmem", zone_lockedmem_kstat_update);
1901 1901 zone->zone_swapresv_kstat = zone_kstat_create_common(zone,
1902 1902 "swapresv", zone_swapresv_kstat_update);
1903 1903 zone->zone_nprocs_kstat = zone_kstat_create_common(zone,
1904 1904 "nprocs", zone_nprocs_kstat_update);
1905 1905
1906 1906 if ((zone->zone_misc_ksp = zone_misc_kstat_create(zone)) == NULL) {
1907 1907 zone->zone_misc_stats = kmem_zalloc(
1908 1908 sizeof (zone_misc_kstat_t), KM_SLEEP);
1909 1909 }
1910 1910 }
1911 1911
1912 1912 static void
1913 1913 zone_kstat_delete_common(kstat_t **pkstat, size_t datasz)
1914 1914 {
1915 1915 void *data;
1916 1916
1917 1917 if (*pkstat != NULL) {
1918 1918 data = (*pkstat)->ks_data;
1919 1919 kstat_delete(*pkstat);
1920 1920 kmem_free(data, datasz);
1921 1921 *pkstat = NULL;
1922 1922 }
1923 1923 }
1924 1924
1925 1925 static void
1926 1926 zone_kstat_delete(zone_t *zone)
1927 1927 {
1928 1928 zone_kstat_delete_common(&zone->zone_lockedmem_kstat,
1929 1929 sizeof (zone_kstat_t));
1930 1930 zone_kstat_delete_common(&zone->zone_swapresv_kstat,
1931 1931 sizeof (zone_kstat_t));
1932 1932 zone_kstat_delete_common(&zone->zone_nprocs_kstat,
1933 1933 sizeof (zone_kstat_t));
1934 1934 zone_kstat_delete_common(&zone->zone_misc_ksp,
1935 1935 sizeof (zone_misc_kstat_t));
1936 1936 }
1937 1937
1938 1938 /*
1939 1939 * Called very early on in boot to initialize the ZSD list so that
1940 1940 * zone_key_create() can be called before zone_init(). It also initializes
1941 1941 * portions of zone0 which may be used before zone_init() is called. The
1942 1942 * variable "global_zone" will be set when zone0 is fully initialized by
1943 1943 * zone_init().
1944 1944 */
1945 1945 void
1946 1946 zone_zsd_init(void)
1947 1947 {
1948 1948 mutex_init(&zonehash_lock, NULL, MUTEX_DEFAULT, NULL);
1949 1949 mutex_init(&zsd_key_lock, NULL, MUTEX_DEFAULT, NULL);
1950 1950 list_create(&zsd_registered_keys, sizeof (struct zsd_entry),
1951 1951 offsetof(struct zsd_entry, zsd_linkage));
1952 1952 list_create(&zone_active, sizeof (zone_t),
1953 1953 offsetof(zone_t, zone_linkage));
1954 1954 list_create(&zone_deathrow, sizeof (zone_t),
1955 1955 offsetof(zone_t, zone_linkage));
1956 1956
1957 1957 mutex_init(&zone0.zone_lock, NULL, MUTEX_DEFAULT, NULL);
1958 1958 mutex_init(&zone0.zone_nlwps_lock, NULL, MUTEX_DEFAULT, NULL);
1959 1959 mutex_init(&zone0.zone_mem_lock, NULL, MUTEX_DEFAULT, NULL);
1960 1960 zone0.zone_shares = 1;
1961 1961 zone0.zone_nlwps = 0;
1962 1962 zone0.zone_nlwps_ctl = INT_MAX;
1963 1963 zone0.zone_nprocs = 0;
1964 1964 zone0.zone_nprocs_ctl = INT_MAX;
1965 1965 zone0.zone_locked_mem = 0;
1966 1966 zone0.zone_locked_mem_ctl = UINT64_MAX;
1967 1967 ASSERT(zone0.zone_max_swap == 0);
1968 1968 zone0.zone_max_swap_ctl = UINT64_MAX;
1969 1969 zone0.zone_max_lofi = 0;
1970 1970 zone0.zone_max_lofi_ctl = UINT64_MAX;
1971 1971 zone0.zone_shmmax = 0;
1972 1972 zone0.zone_ipc.ipcq_shmmni = 0;
1973 1973 zone0.zone_ipc.ipcq_semmni = 0;
1974 1974 zone0.zone_ipc.ipcq_msgmni = 0;
1975 1975 zone0.zone_name = GLOBAL_ZONENAME;
1976 1976 zone0.zone_nodename = utsname.nodename;
1977 1977 zone0.zone_domain = srpc_domain;
1978 1978 zone0.zone_hostid = HW_INVALID_HOSTID;
1979 1979 zone0.zone_fs_allowed = NULL;
1980 1980 zone0.zone_ref = 1;
1981 1981 zone0.zone_id = GLOBAL_ZONEID;
1982 1982 zone0.zone_status = ZONE_IS_RUNNING;
1983 1983 zone0.zone_rootpath = "/";
1984 1984 zone0.zone_rootpathlen = 2;
1985 1985 zone0.zone_psetid = ZONE_PS_INVAL;
1986 1986 zone0.zone_ncpus = 0;
1987 1987 zone0.zone_ncpus_online = 0;
1988 1988 zone0.zone_proc_initpid = 1;
1989 1989 zone0.zone_initname = initname;
1990 1990 zone0.zone_lockedmem_kstat = NULL;
1991 1991 zone0.zone_swapresv_kstat = NULL;
1992 1992 zone0.zone_nprocs_kstat = NULL;
1993 1993
1994 1994 zone0.zone_stime = 0;
1995 1995 zone0.zone_utime = 0;
1996 1996 zone0.zone_wtime = 0;
1997 1997
1998 1998 list_create(&zone0.zone_ref_list, sizeof (zone_ref_t),
1999 1999 offsetof(zone_ref_t, zref_linkage));
2000 2000 list_create(&zone0.zone_zsd, sizeof (struct zsd_entry),
2001 2001 offsetof(struct zsd_entry, zsd_linkage));
2002 2002 list_insert_head(&zone_active, &zone0);
2003 2003
2004 2004 /*
2005 2005 * The root filesystem is not mounted yet, so zone_rootvp cannot be set
2006 2006 * to anything meaningful. It is assigned to be 'rootdir' in
2007 2007 * vfs_mountroot().
2008 2008 */
2009 2009 zone0.zone_rootvp = NULL;
2010 2010 zone0.zone_vfslist = NULL;
2011 2011 zone0.zone_bootargs = initargs;
2012 2012 zone0.zone_privset = kmem_alloc(sizeof (priv_set_t), KM_SLEEP);
2013 2013 /*
2014 2014 * The global zone has all privileges
2015 2015 */
2016 2016 priv_fillset(zone0.zone_privset);
2017 2017 /*
2018 2018 * Add p0 to the global zone
2019 2019 */
2020 2020 zone0.zone_zsched = &p0;
2021 2021 p0.p_zone = &zone0;
2022 2022 }
2023 2023
2024 2024 /*
2025 2025 * Compute a hash value based on the contents of the label and the DOI. The
2026 2026 * hash algorithm is somewhat arbitrary, but is based on the observation that
2027 2027 * humans will likely pick labels that differ by amounts that work out to be
2028 2028 * multiples of the number of hash chains, and thus stirring in some primes
2029 2029 * should help.
2030 2030 */
2031 2031 static uint_t
2032 2032 hash_bylabel(void *hdata, mod_hash_key_t key)
2033 2033 {
2034 2034 const ts_label_t *lab = (ts_label_t *)key;
2035 2035 const uint32_t *up, *ue;
2036 2036 uint_t hash;
2037 2037 int i;
2038 2038
2039 2039 _NOTE(ARGUNUSED(hdata));
2040 2040
2041 2041 hash = lab->tsl_doi + (lab->tsl_doi << 1);
2042 2042 /* we depend on alignment of label, but not representation */
2043 2043 up = (const uint32_t *)&lab->tsl_label;
2044 2044 ue = up + sizeof (lab->tsl_label) / sizeof (*up);
2045 2045 i = 1;
2046 2046 while (up < ue) {
2047 2047 /* using 2^n + 1, 1 <= n <= 16 as source of many primes */
2048 2048 hash += *up + (*up << ((i % 16) + 1));
2049 2049 up++;
2050 2050 i++;
2051 2051 }
2052 2052 return (hash);
2053 2053 }
2054 2054
2055 2055 /*
2056 2056 * All that mod_hash cares about here is zero (equal) versus non-zero (not
2057 2057 * equal). This may need to be changed if less than / greater than is ever
2058 2058 * needed.
2059 2059 */
2060 2060 static int
2061 2061 hash_labelkey_cmp(mod_hash_key_t key1, mod_hash_key_t key2)
2062 2062 {
2063 2063 ts_label_t *lab1 = (ts_label_t *)key1;
2064 2064 ts_label_t *lab2 = (ts_label_t *)key2;
2065 2065
2066 2066 return (label_equal(lab1, lab2) ? 0 : 1);
2067 2067 }
2068 2068
2069 2069 /*
2070 2070 * Called by main() to initialize the zones framework.
2071 2071 */
2072 2072 void
2073 2073 zone_init(void)
2074 2074 {
2075 2075 rctl_dict_entry_t *rde;
2076 2076 rctl_val_t *dval;
2077 2077 rctl_set_t *set;
2078 2078 rctl_alloc_gp_t *gp;
2079 2079 rctl_entity_p_t e;
2080 2080 int res;
2081 2081
2082 2082 ASSERT(curproc == &p0);
2083 2083
2084 2084 /*
2085 2085 * Create ID space for zone IDs. ID 0 is reserved for the
2086 2086 * global zone.
2087 2087 */
2088 2088 zoneid_space = id_space_create("zoneid_space", 1, MAX_ZONEID);
2089 2089
2090 2090 /*
2091 2091 * Initialize generic zone resource controls, if any.
2092 2092 */
2093 2093 rc_zone_cpu_shares = rctl_register("zone.cpu-shares",
2094 2094 RCENTITY_ZONE, RCTL_GLOBAL_SIGNAL_NEVER | RCTL_GLOBAL_DENY_NEVER |
2095 2095 RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT | RCTL_GLOBAL_SYSLOG_NEVER,
2096 2096 FSS_MAXSHARES, FSS_MAXSHARES, &zone_cpu_shares_ops);
2097 2097
2098 2098 rc_zone_cpu_cap = rctl_register("zone.cpu-cap",
2099 2099 RCENTITY_ZONE, RCTL_GLOBAL_SIGNAL_NEVER | RCTL_GLOBAL_DENY_ALWAYS |
2100 2100 RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT |RCTL_GLOBAL_SYSLOG_NEVER |
2101 2101 RCTL_GLOBAL_INFINITE,
2102 2102 MAXCAP, MAXCAP, &zone_cpu_cap_ops);
2103 2103
2104 2104 rc_zone_nlwps = rctl_register("zone.max-lwps", RCENTITY_ZONE,
2105 2105 RCTL_GLOBAL_NOACTION | RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT,
2106 2106 INT_MAX, INT_MAX, &zone_lwps_ops);
2107 2107
2108 2108 rc_zone_nprocs = rctl_register("zone.max-processes", RCENTITY_ZONE,
2109 2109 RCTL_GLOBAL_NOACTION | RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT,
2110 2110 INT_MAX, INT_MAX, &zone_procs_ops);
2111 2111
2112 2112 /*
2113 2113 * System V IPC resource controls
2114 2114 */
2115 2115 rc_zone_msgmni = rctl_register("zone.max-msg-ids",
2116 2116 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC |
2117 2117 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_msgmni_ops);
2118 2118
2119 2119 rc_zone_semmni = rctl_register("zone.max-sem-ids",
2120 2120 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC |
2121 2121 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_semmni_ops);
2122 2122
2123 2123 rc_zone_shmmni = rctl_register("zone.max-shm-ids",
2124 2124 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC |
2125 2125 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_shmmni_ops);
2126 2126
2127 2127 rc_zone_shmmax = rctl_register("zone.max-shm-memory",
2128 2128 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC |
2129 2129 RCTL_GLOBAL_BYTES, UINT64_MAX, UINT64_MAX, &zone_shmmax_ops);
2130 2130
2131 2131 /*
2132 2132 * Create a rctl_val with PRIVILEGED, NOACTION, value = 1. Then attach
2133 2133 * this at the head of the rctl_dict_entry for ``zone.cpu-shares''.
2134 2134 */
2135 2135 dval = kmem_cache_alloc(rctl_val_cache, KM_SLEEP);
2136 2136 bzero(dval, sizeof (rctl_val_t));
2137 2137 dval->rcv_value = 1;
2138 2138 dval->rcv_privilege = RCPRIV_PRIVILEGED;
2139 2139 dval->rcv_flagaction = RCTL_LOCAL_NOACTION;
2140 2140 dval->rcv_action_recip_pid = -1;
2141 2141
2142 2142 rde = rctl_dict_lookup("zone.cpu-shares");
2143 2143 (void) rctl_val_list_insert(&rde->rcd_default_value, dval);
2144 2144
2145 2145 rc_zone_locked_mem = rctl_register("zone.max-locked-memory",
2146 2146 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_BYTES |
2147 2147 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX,
2148 2148 &zone_locked_mem_ops);
2149 2149
2150 2150 rc_zone_max_swap = rctl_register("zone.max-swap",
2151 2151 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_BYTES |
2152 2152 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX,
2153 2153 &zone_max_swap_ops);
2154 2154
2155 2155 rc_zone_max_lofi = rctl_register("zone.max-lofi",
2156 2156 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT |
2157 2157 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX,
2158 2158 &zone_max_lofi_ops);
2159 2159
2160 2160 /*
2161 2161 * Initialize the ``global zone''.
2162 2162 */
2163 2163 set = rctl_set_create();
2164 2164 gp = rctl_set_init_prealloc(RCENTITY_ZONE);
2165 2165 mutex_enter(&p0.p_lock);
2166 2166 e.rcep_p.zone = &zone0;
2167 2167 e.rcep_t = RCENTITY_ZONE;
2168 2168 zone0.zone_rctls = rctl_set_init(RCENTITY_ZONE, &p0, &e, set,
2169 2169 gp);
2170 2170
2171 2171 zone0.zone_nlwps = p0.p_lwpcnt;
2172 2172 zone0.zone_nprocs = 1;
2173 2173 zone0.zone_ntasks = 1;
2174 2174 mutex_exit(&p0.p_lock);
2175 2175 zone0.zone_restart_init = B_TRUE;
2176 2176 zone0.zone_brand = &native_brand;
2177 2177 rctl_prealloc_destroy(gp);
2178 2178 /*
2179 2179 * pool_default hasn't been initialized yet, so we let pool_init()
2180 2180 * take care of making sure the global zone is in the default pool.
2181 2181 */
2182 2182
2183 2183 /*
2184 2184 * Initialize global zone kstats
2185 2185 */
2186 2186 zone_kstat_create(&zone0);
2187 2187
2188 2188 /*
2189 2189 * Initialize zone label.
2190 2190 * mlp are initialized when tnzonecfg is loaded.
2191 2191 */
2192 2192 zone0.zone_slabel = l_admin_low;
2193 2193 rw_init(&zone0.zone_mlps.mlpl_rwlock, NULL, RW_DEFAULT, NULL);
2194 2194 label_hold(l_admin_low);
2195 2195
2196 2196 /*
2197 2197 * Initialise the lock for the database structure used by mntfs.
2198 2198 */
2199 2199 rw_init(&zone0.zone_mntfs_db_lock, NULL, RW_DEFAULT, NULL);
2200 2200
2201 2201 mutex_enter(&zonehash_lock);
2202 2202 zone_uniqid(&zone0);
2203 2203 ASSERT(zone0.zone_uniqid == GLOBAL_ZONEUNIQID);
2204 2204
2205 2205 zonehashbyid = mod_hash_create_idhash("zone_by_id", zone_hash_size,
2206 2206 mod_hash_null_valdtor);
2207 2207 zonehashbyname = mod_hash_create_strhash("zone_by_name",
2208 2208 zone_hash_size, mod_hash_null_valdtor);
2209 2209 /*
2210 2210 * maintain zonehashbylabel only for labeled systems
2211 2211 */
2212 2212 if (is_system_labeled())
2213 2213 zonehashbylabel = mod_hash_create_extended("zone_by_label",
2214 2214 zone_hash_size, mod_hash_null_keydtor,
2215 2215 mod_hash_null_valdtor, hash_bylabel, NULL,
2216 2216 hash_labelkey_cmp, KM_SLEEP);
2217 2217 zonecount = 1;
2218 2218
2219 2219 (void) mod_hash_insert(zonehashbyid, (mod_hash_key_t)GLOBAL_ZONEID,
2220 2220 (mod_hash_val_t)&zone0);
2221 2221 (void) mod_hash_insert(zonehashbyname, (mod_hash_key_t)zone0.zone_name,
2222 2222 (mod_hash_val_t)&zone0);
2223 2223 if (is_system_labeled()) {
2224 2224 zone0.zone_flags |= ZF_HASHED_LABEL;
2225 2225 (void) mod_hash_insert(zonehashbylabel,
2226 2226 (mod_hash_key_t)zone0.zone_slabel, (mod_hash_val_t)&zone0);
2227 2227 }
2228 2228 mutex_exit(&zonehash_lock);
2229 2229
2230 2230 /*
2231 2231 * We avoid setting zone_kcred until now, since kcred is initialized
2232 2232 * sometime after zone_zsd_init() and before zone_init().
2233 2233 */
2234 2234 zone0.zone_kcred = kcred;
2235 2235 /*
2236 2236 * The global zone is fully initialized (except for zone_rootvp which
2237 2237 * will be set when the root filesystem is mounted).
2238 2238 */
2239 2239 global_zone = &zone0;
2240 2240
2241 2241 /*
2242 2242 * Setup an event channel to send zone status change notifications on
2243 2243 */
2244 2244 res = sysevent_evc_bind(ZONE_EVENT_CHANNEL, &zone_event_chan,
2245 2245 EVCH_CREAT);
2246 2246
2247 2247 if (res)
2248 2248 panic("Sysevent_evc_bind failed during zone setup.\n");
2249 2249
2250 2250 }
2251 2251
2252 2252 static void
2253 2253 zone_free(zone_t *zone)
2254 2254 {
2255 2255 ASSERT(zone != global_zone);
2256 2256 ASSERT(zone->zone_ntasks == 0);
2257 2257 ASSERT(zone->zone_nlwps == 0);
2258 2258 ASSERT(zone->zone_nprocs == 0);
2259 2259 ASSERT(zone->zone_cred_ref == 0);
2260 2260 ASSERT(zone->zone_kcred == NULL);
2261 2261 ASSERT(zone_status_get(zone) == ZONE_IS_DEAD ||
2262 2262 zone_status_get(zone) == ZONE_IS_UNINITIALIZED);
2263 2263 ASSERT(list_is_empty(&zone->zone_ref_list));
2264 2264
2265 2265 /*
2266 2266 * Remove any zone caps.
2267 2267 */
2268 2268 cpucaps_zone_remove(zone);
2269 2269
2270 2270 ASSERT(zone->zone_cpucap == NULL);
2271 2271
2272 2272 /* remove from deathrow list */
2273 2273 if (zone_status_get(zone) == ZONE_IS_DEAD) {
2274 2274 ASSERT(zone->zone_ref == 0);
2275 2275 mutex_enter(&zone_deathrow_lock);
2276 2276 list_remove(&zone_deathrow, zone);
2277 2277 mutex_exit(&zone_deathrow_lock);
2278 2278 }
2279 2279
2280 2280 list_destroy(&zone->zone_ref_list);
2281 2281 zone_free_zsd(zone);
2282 2282 zone_free_datasets(zone);
2283 2283 list_destroy(&zone->zone_dl_list);
2284 2284
2285 2285 if (zone->zone_rootvp != NULL)
2286 2286 VN_RELE(zone->zone_rootvp);
2287 2287 if (zone->zone_rootpath)
2288 2288 kmem_free(zone->zone_rootpath, zone->zone_rootpathlen);
2289 2289 if (zone->zone_name != NULL)
2290 2290 kmem_free(zone->zone_name, ZONENAME_MAX);
2291 2291 if (zone->zone_slabel != NULL)
2292 2292 label_rele(zone->zone_slabel);
2293 2293 if (zone->zone_nodename != NULL)
2294 2294 kmem_free(zone->zone_nodename, _SYS_NMLN);
2295 2295 if (zone->zone_domain != NULL)
2296 2296 kmem_free(zone->zone_domain, _SYS_NMLN);
2297 2297 if (zone->zone_privset != NULL)
2298 2298 kmem_free(zone->zone_privset, sizeof (priv_set_t));
2299 2299 if (zone->zone_rctls != NULL)
2300 2300 rctl_set_free(zone->zone_rctls);
2301 2301 if (zone->zone_bootargs != NULL)
2302 2302 strfree(zone->zone_bootargs);
2303 2303 if (zone->zone_initname != NULL)
2304 2304 strfree(zone->zone_initname);
2305 2305 if (zone->zone_fs_allowed != NULL)
2306 2306 strfree(zone->zone_fs_allowed);
2307 2307 if (zone->zone_pfexecd != NULL)
2308 2308 klpd_freelist(&zone->zone_pfexecd);
2309 2309 id_free(zoneid_space, zone->zone_id);
2310 2310 mutex_destroy(&zone->zone_lock);
2311 2311 cv_destroy(&zone->zone_cv);
2312 2312 rw_destroy(&zone->zone_mlps.mlpl_rwlock);
2313 2313 rw_destroy(&zone->zone_mntfs_db_lock);
2314 2314 kmem_free(zone, sizeof (zone_t));
2315 2315 }
2316 2316
2317 2317 /*
2318 2318 * See block comment at the top of this file for information about zone
2319 2319 * status values.
2320 2320 */
2321 2321 /*
2322 2322 * Convenience function for setting zone status.
2323 2323 */
2324 2324 static void
2325 2325 zone_status_set(zone_t *zone, zone_status_t status)
2326 2326 {
2327 2327
2328 2328 nvlist_t *nvl = NULL;
2329 2329 ASSERT(MUTEX_HELD(&zone_status_lock));
2330 2330 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE &&
2331 2331 status >= zone_status_get(zone));
2332 2332
2333 2333 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) ||
2334 2334 nvlist_add_string(nvl, ZONE_CB_NAME, zone->zone_name) ||
2335 2335 nvlist_add_string(nvl, ZONE_CB_NEWSTATE,
2336 2336 zone_status_table[status]) ||
2337 2337 nvlist_add_string(nvl, ZONE_CB_OLDSTATE,
2338 2338 zone_status_table[zone->zone_status]) ||
2339 2339 nvlist_add_int32(nvl, ZONE_CB_ZONEID, zone->zone_id) ||
2340 2340 nvlist_add_uint64(nvl, ZONE_CB_TIMESTAMP, (uint64_t)gethrtime()) ||
2341 2341 sysevent_evc_publish(zone_event_chan, ZONE_EVENT_STATUS_CLASS,
2342 2342 ZONE_EVENT_STATUS_SUBCLASS, "sun.com", "kernel", nvl, EVCH_SLEEP)) {
2343 2343 #ifdef DEBUG
2344 2344 (void) printf(
2345 2345 "Failed to allocate and send zone state change event.\n");
2346 2346 #endif
2347 2347 }
2348 2348 nvlist_free(nvl);
2349 2349
2350 2350 zone->zone_status = status;
2351 2351
2352 2352 cv_broadcast(&zone->zone_cv);
2353 2353 }
2354 2354
2355 2355 /*
2356 2356 * Public function to retrieve the zone status. The zone status may
2357 2357 * change after it is retrieved.
2358 2358 */
2359 2359 zone_status_t
2360 2360 zone_status_get(zone_t *zone)
2361 2361 {
2362 2362 return (zone->zone_status);
2363 2363 }
2364 2364
2365 2365 static int
2366 2366 zone_set_bootargs(zone_t *zone, const char *zone_bootargs)
2367 2367 {
2368 2368 char *buf = kmem_zalloc(BOOTARGS_MAX, KM_SLEEP);
2369 2369 int err = 0;
2370 2370
2371 2371 ASSERT(zone != global_zone);
2372 2372 if ((err = copyinstr(zone_bootargs, buf, BOOTARGS_MAX, NULL)) != 0)
2373 2373 goto done; /* EFAULT or ENAMETOOLONG */
2374 2374
2375 2375 if (zone->zone_bootargs != NULL)
2376 2376 strfree(zone->zone_bootargs);
2377 2377
2378 2378 zone->zone_bootargs = strdup(buf);
2379 2379
2380 2380 done:
2381 2381 kmem_free(buf, BOOTARGS_MAX);
2382 2382 return (err);
2383 2383 }
2384 2384
2385 2385 static int
2386 2386 zone_set_brand(zone_t *zone, const char *brand)
2387 2387 {
2388 2388 struct brand_attr *attrp;
2389 2389 brand_t *bp;
2390 2390
2391 2391 attrp = kmem_alloc(sizeof (struct brand_attr), KM_SLEEP);
2392 2392 if (copyin(brand, attrp, sizeof (struct brand_attr)) != 0) {
2393 2393 kmem_free(attrp, sizeof (struct brand_attr));
2394 2394 return (EFAULT);
2395 2395 }
2396 2396
2397 2397 bp = brand_register_zone(attrp);
2398 2398 kmem_free(attrp, sizeof (struct brand_attr));
2399 2399 if (bp == NULL)
2400 2400 return (EINVAL);
2401 2401
2402 2402 /*
2403 2403 * This is the only place where a zone can change it's brand.
2404 2404 * We already need to hold zone_status_lock to check the zone
2405 2405 * status, so we'll just use that lock to serialize zone
2406 2406 * branding requests as well.
2407 2407 */
2408 2408 mutex_enter(&zone_status_lock);
2409 2409
2410 2410 /* Re-Branding is not allowed and the zone can't be booted yet */
2411 2411 if ((ZONE_IS_BRANDED(zone)) ||
2412 2412 (zone_status_get(zone) >= ZONE_IS_BOOTING)) {
2413 2413 mutex_exit(&zone_status_lock);
2414 2414 brand_unregister_zone(bp);
2415 2415 return (EINVAL);
2416 2416 }
2417 2417
2418 2418 /* set up the brand specific data */
2419 2419 zone->zone_brand = bp;
2420 2420 ZBROP(zone)->b_init_brand_data(zone);
2421 2421
2422 2422 mutex_exit(&zone_status_lock);
2423 2423 return (0);
2424 2424 }
2425 2425
2426 2426 static int
2427 2427 zone_set_fs_allowed(zone_t *zone, const char *zone_fs_allowed)
2428 2428 {
2429 2429 char *buf = kmem_zalloc(ZONE_FS_ALLOWED_MAX, KM_SLEEP);
2430 2430 int err = 0;
2431 2431
2432 2432 ASSERT(zone != global_zone);
2433 2433 if ((err = copyinstr(zone_fs_allowed, buf,
2434 2434 ZONE_FS_ALLOWED_MAX, NULL)) != 0)
2435 2435 goto done;
2436 2436
2437 2437 if (zone->zone_fs_allowed != NULL)
2438 2438 strfree(zone->zone_fs_allowed);
2439 2439
2440 2440 zone->zone_fs_allowed = strdup(buf);
2441 2441
2442 2442 done:
2443 2443 kmem_free(buf, ZONE_FS_ALLOWED_MAX);
2444 2444 return (err);
2445 2445 }
2446 2446
2447 2447 static int
2448 2448 zone_set_initname(zone_t *zone, const char *zone_initname)
2449 2449 {
2450 2450 char initname[INITNAME_SZ];
2451 2451 size_t len;
2452 2452 int err = 0;
2453 2453
2454 2454 ASSERT(zone != global_zone);
2455 2455 if ((err = copyinstr(zone_initname, initname, INITNAME_SZ, &len)) != 0)
2456 2456 return (err); /* EFAULT or ENAMETOOLONG */
2457 2457
2458 2458 if (zone->zone_initname != NULL)
2459 2459 strfree(zone->zone_initname);
2460 2460
2461 2461 zone->zone_initname = kmem_alloc(strlen(initname) + 1, KM_SLEEP);
2462 2462 (void) strcpy(zone->zone_initname, initname);
2463 2463 return (0);
2464 2464 }
2465 2465
2466 2466 static int
2467 2467 zone_set_phys_mcap(zone_t *zone, const uint64_t *zone_mcap)
2468 2468 {
2469 2469 uint64_t mcap;
2470 2470 int err = 0;
2471 2471
2472 2472 if ((err = copyin(zone_mcap, &mcap, sizeof (uint64_t))) == 0)
2473 2473 zone->zone_phys_mcap = mcap;
2474 2474
2475 2475 return (err);
2476 2476 }
2477 2477
2478 2478 static int
2479 2479 zone_set_sched_class(zone_t *zone, const char *new_class)
2480 2480 {
2481 2481 char sched_class[PC_CLNMSZ];
2482 2482 id_t classid;
2483 2483 int err;
2484 2484
2485 2485 ASSERT(zone != global_zone);
2486 2486 if ((err = copyinstr(new_class, sched_class, PC_CLNMSZ, NULL)) != 0)
2487 2487 return (err); /* EFAULT or ENAMETOOLONG */
2488 2488
2489 2489 if (getcid(sched_class, &classid) != 0 || CLASS_KERNEL(classid))
2490 2490 return (set_errno(EINVAL));
2491 2491 zone->zone_defaultcid = classid;
2492 2492 ASSERT(zone->zone_defaultcid > 0 &&
2493 2493 zone->zone_defaultcid < loaded_classes);
2494 2494
2495 2495 return (0);
2496 2496 }
2497 2497
2498 2498 /*
2499 2499 * Block indefinitely waiting for (zone_status >= status)
2500 2500 */
2501 2501 void
2502 2502 zone_status_wait(zone_t *zone, zone_status_t status)
2503 2503 {
2504 2504 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2505 2505
2506 2506 mutex_enter(&zone_status_lock);
2507 2507 while (zone->zone_status < status) {
2508 2508 cv_wait(&zone->zone_cv, &zone_status_lock);
2509 2509 }
2510 2510 mutex_exit(&zone_status_lock);
2511 2511 }
2512 2512
2513 2513 /*
2514 2514 * Private CPR-safe version of zone_status_wait().
2515 2515 */
2516 2516 static void
2517 2517 zone_status_wait_cpr(zone_t *zone, zone_status_t status, char *str)
2518 2518 {
2519 2519 callb_cpr_t cprinfo;
2520 2520
2521 2521 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2522 2522
2523 2523 CALLB_CPR_INIT(&cprinfo, &zone_status_lock, callb_generic_cpr,
2524 2524 str);
2525 2525 mutex_enter(&zone_status_lock);
2526 2526 while (zone->zone_status < status) {
2527 2527 CALLB_CPR_SAFE_BEGIN(&cprinfo);
2528 2528 cv_wait(&zone->zone_cv, &zone_status_lock);
2529 2529 CALLB_CPR_SAFE_END(&cprinfo, &zone_status_lock);
2530 2530 }
2531 2531 /*
2532 2532 * zone_status_lock is implicitly released by the following.
2533 2533 */
2534 2534 CALLB_CPR_EXIT(&cprinfo);
2535 2535 }
2536 2536
2537 2537 /*
2538 2538 * Block until zone enters requested state or signal is received. Return (0)
2539 2539 * if signaled, non-zero otherwise.
2540 2540 */
2541 2541 int
2542 2542 zone_status_wait_sig(zone_t *zone, zone_status_t status)
2543 2543 {
2544 2544 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2545 2545
2546 2546 mutex_enter(&zone_status_lock);
2547 2547 while (zone->zone_status < status) {
2548 2548 if (!cv_wait_sig(&zone->zone_cv, &zone_status_lock)) {
2549 2549 mutex_exit(&zone_status_lock);
2550 2550 return (0);
2551 2551 }
2552 2552 }
2553 2553 mutex_exit(&zone_status_lock);
2554 2554 return (1);
2555 2555 }
2556 2556
2557 2557 /*
2558 2558 * Block until the zone enters the requested state or the timeout expires,
2559 2559 * whichever happens first. Return (-1) if operation timed out, time remaining
2560 2560 * otherwise.
2561 2561 */
2562 2562 clock_t
2563 2563 zone_status_timedwait(zone_t *zone, clock_t tim, zone_status_t status)
2564 2564 {
2565 2565 clock_t timeleft = 0;
2566 2566
2567 2567 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2568 2568
2569 2569 mutex_enter(&zone_status_lock);
2570 2570 while (zone->zone_status < status && timeleft != -1) {
2571 2571 timeleft = cv_timedwait(&zone->zone_cv, &zone_status_lock, tim);
2572 2572 }
2573 2573 mutex_exit(&zone_status_lock);
2574 2574 return (timeleft);
2575 2575 }
2576 2576
2577 2577 /*
2578 2578 * Block until the zone enters the requested state, the current process is
2579 2579 * signaled, or the timeout expires, whichever happens first. Return (-1) if
2580 2580 * operation timed out, 0 if signaled, time remaining otherwise.
2581 2581 */
2582 2582 clock_t
2583 2583 zone_status_timedwait_sig(zone_t *zone, clock_t tim, zone_status_t status)
2584 2584 {
2585 2585 clock_t timeleft = tim - ddi_get_lbolt();
2586 2586
2587 2587 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2588 2588
2589 2589 mutex_enter(&zone_status_lock);
2590 2590 while (zone->zone_status < status) {
2591 2591 timeleft = cv_timedwait_sig(&zone->zone_cv, &zone_status_lock,
2592 2592 tim);
2593 2593 if (timeleft <= 0)
2594 2594 break;
2595 2595 }
2596 2596 mutex_exit(&zone_status_lock);
2597 2597 return (timeleft);
2598 2598 }
2599 2599
2600 2600 /*
2601 2601 * Zones have two reference counts: one for references from credential
2602 2602 * structures (zone_cred_ref), and one (zone_ref) for everything else.
2603 2603 * This is so we can allow a zone to be rebooted while there are still
2604 2604 * outstanding cred references, since certain drivers cache dblks (which
2605 2605 * implicitly results in cached creds). We wait for zone_ref to drop to
2606 2606 * 0 (actually 1), but not zone_cred_ref. The zone structure itself is
2607 2607 * later freed when the zone_cred_ref drops to 0, though nothing other
2608 2608 * than the zone id and privilege set should be accessed once the zone
2609 2609 * is "dead".
2610 2610 *
2611 2611 * A debugging flag, zone_wait_for_cred, can be set to a non-zero value
2612 2612 * to force halt/reboot to block waiting for the zone_cred_ref to drop
2613 2613 * to 0. This can be useful to flush out other sources of cached creds
2614 2614 * that may be less innocuous than the driver case.
2615 2615 *
2616 2616 * Zones also provide a tracked reference counting mechanism in which zone
2617 2617 * references are represented by "crumbs" (zone_ref structures). Crumbs help
2618 2618 * debuggers determine the sources of leaked zone references. See
2619 2619 * zone_hold_ref() and zone_rele_ref() below for more information.
2620 2620 */
2621 2621
2622 2622 int zone_wait_for_cred = 0;
2623 2623
2624 2624 static void
2625 2625 zone_hold_locked(zone_t *z)
2626 2626 {
2627 2627 ASSERT(MUTEX_HELD(&z->zone_lock));
2628 2628 z->zone_ref++;
2629 2629 ASSERT(z->zone_ref != 0);
2630 2630 }
2631 2631
2632 2632 /*
2633 2633 * Increment the specified zone's reference count. The zone's zone_t structure
2634 2634 * will not be freed as long as the zone's reference count is nonzero.
2635 2635 * Decrement the zone's reference count via zone_rele().
2636 2636 *
2637 2637 * NOTE: This function should only be used to hold zones for short periods of
2638 2638 * time. Use zone_hold_ref() if the zone must be held for a long time.
2639 2639 */
2640 2640 void
2641 2641 zone_hold(zone_t *z)
2642 2642 {
2643 2643 mutex_enter(&z->zone_lock);
2644 2644 zone_hold_locked(z);
2645 2645 mutex_exit(&z->zone_lock);
2646 2646 }
2647 2647
2648 2648 /*
2649 2649 * If the non-cred ref count drops to 1 and either the cred ref count
2650 2650 * is 0 or we aren't waiting for cred references, the zone is ready to
2651 2651 * be destroyed.
2652 2652 */
2653 2653 #define ZONE_IS_UNREF(zone) ((zone)->zone_ref == 1 && \
2654 2654 (!zone_wait_for_cred || (zone)->zone_cred_ref == 0))
2655 2655
2656 2656 /*
2657 2657 * Common zone reference release function invoked by zone_rele() and
2658 2658 * zone_rele_ref(). If subsys is ZONE_REF_NUM_SUBSYS, then the specified
2659 2659 * zone's subsystem-specific reference counters are not affected by the
2660 2660 * release. If ref is not NULL, then the zone_ref_t to which it refers is
2661 2661 * removed from the specified zone's reference list. ref must be non-NULL iff
2662 2662 * subsys is not ZONE_REF_NUM_SUBSYS.
2663 2663 */
2664 2664 static void
2665 2665 zone_rele_common(zone_t *z, zone_ref_t *ref, zone_ref_subsys_t subsys)
2666 2666 {
2667 2667 boolean_t wakeup;
2668 2668
2669 2669 mutex_enter(&z->zone_lock);
2670 2670 ASSERT(z->zone_ref != 0);
2671 2671 z->zone_ref--;
2672 2672 if (subsys != ZONE_REF_NUM_SUBSYS) {
2673 2673 ASSERT(z->zone_subsys_ref[subsys] != 0);
2674 2674 z->zone_subsys_ref[subsys]--;
2675 2675 list_remove(&z->zone_ref_list, ref);
2676 2676 }
2677 2677 if (z->zone_ref == 0 && z->zone_cred_ref == 0) {
2678 2678 /* no more refs, free the structure */
2679 2679 mutex_exit(&z->zone_lock);
2680 2680 zone_free(z);
2681 2681 return;
2682 2682 }
2683 2683 /* signal zone_destroy so the zone can finish halting */
2684 2684 wakeup = (ZONE_IS_UNREF(z) && zone_status_get(z) >= ZONE_IS_DEAD);
2685 2685 mutex_exit(&z->zone_lock);
2686 2686
2687 2687 if (wakeup) {
2688 2688 /*
2689 2689 * Grabbing zonehash_lock here effectively synchronizes with
2690 2690 * zone_destroy() to avoid missed signals.
2691 2691 */
2692 2692 mutex_enter(&zonehash_lock);
2693 2693 cv_broadcast(&zone_destroy_cv);
2694 2694 mutex_exit(&zonehash_lock);
2695 2695 }
2696 2696 }
2697 2697
2698 2698 /*
2699 2699 * Decrement the specified zone's reference count. The specified zone will
2700 2700 * cease to exist after this function returns if the reference count drops to
2701 2701 * zero. This function should be paired with zone_hold().
2702 2702 */
2703 2703 void
2704 2704 zone_rele(zone_t *z)
2705 2705 {
2706 2706 zone_rele_common(z, NULL, ZONE_REF_NUM_SUBSYS);
2707 2707 }
2708 2708
2709 2709 /*
2710 2710 * Initialize a zone reference structure. This function must be invoked for
2711 2711 * a reference structure before the structure is passed to zone_hold_ref().
2712 2712 */
2713 2713 void
2714 2714 zone_init_ref(zone_ref_t *ref)
2715 2715 {
2716 2716 ref->zref_zone = NULL;
2717 2717 list_link_init(&ref->zref_linkage);
2718 2718 }
2719 2719
2720 2720 /*
2721 2721 * Acquire a reference to zone z. The caller must specify the
2722 2722 * zone_ref_subsys_t constant associated with its subsystem. The specified
2723 2723 * zone_ref_t structure will represent a reference to the specified zone. Use
2724 2724 * zone_rele_ref() to release the reference.
2725 2725 *
2726 2726 * The referenced zone_t structure will not be freed as long as the zone_t's
2727 2727 * zone_status field is not ZONE_IS_DEAD and the zone has outstanding
2728 2728 * references.
2729 2729 *
2730 2730 * NOTE: The zone_ref_t structure must be initialized before it is used.
2731 2731 * See zone_init_ref() above.
2732 2732 */
2733 2733 void
2734 2734 zone_hold_ref(zone_t *z, zone_ref_t *ref, zone_ref_subsys_t subsys)
2735 2735 {
2736 2736 ASSERT(subsys >= 0 && subsys < ZONE_REF_NUM_SUBSYS);
2737 2737
2738 2738 /*
2739 2739 * Prevent consumers from reusing a reference structure before
2740 2740 * releasing it.
2741 2741 */
2742 2742 VERIFY(ref->zref_zone == NULL);
2743 2743
2744 2744 ref->zref_zone = z;
2745 2745 mutex_enter(&z->zone_lock);
2746 2746 zone_hold_locked(z);
2747 2747 z->zone_subsys_ref[subsys]++;
2748 2748 ASSERT(z->zone_subsys_ref[subsys] != 0);
2749 2749 list_insert_head(&z->zone_ref_list, ref);
2750 2750 mutex_exit(&z->zone_lock);
2751 2751 }
2752 2752
2753 2753 /*
2754 2754 * Release the zone reference represented by the specified zone_ref_t.
2755 2755 * The reference is invalid after it's released; however, the zone_ref_t
2756 2756 * structure can be reused without having to invoke zone_init_ref().
2757 2757 * subsys should be the same value that was passed to zone_hold_ref()
2758 2758 * when the reference was acquired.
2759 2759 */
2760 2760 void
2761 2761 zone_rele_ref(zone_ref_t *ref, zone_ref_subsys_t subsys)
2762 2762 {
2763 2763 zone_rele_common(ref->zref_zone, ref, subsys);
2764 2764
2765 2765 /*
2766 2766 * Set the zone_ref_t's zref_zone field to NULL to generate panics
2767 2767 * when consumers dereference the reference. This helps us catch
2768 2768 * consumers who use released references. Furthermore, this lets
2769 2769 * consumers reuse the zone_ref_t structure without having to
2770 2770 * invoke zone_init_ref().
2771 2771 */
2772 2772 ref->zref_zone = NULL;
2773 2773 }
2774 2774
2775 2775 void
2776 2776 zone_cred_hold(zone_t *z)
2777 2777 {
2778 2778 mutex_enter(&z->zone_lock);
2779 2779 z->zone_cred_ref++;
2780 2780 ASSERT(z->zone_cred_ref != 0);
2781 2781 mutex_exit(&z->zone_lock);
2782 2782 }
2783 2783
2784 2784 void
2785 2785 zone_cred_rele(zone_t *z)
2786 2786 {
2787 2787 boolean_t wakeup;
2788 2788
2789 2789 mutex_enter(&z->zone_lock);
2790 2790 ASSERT(z->zone_cred_ref != 0);
2791 2791 z->zone_cred_ref--;
2792 2792 if (z->zone_ref == 0 && z->zone_cred_ref == 0) {
2793 2793 /* no more refs, free the structure */
2794 2794 mutex_exit(&z->zone_lock);
2795 2795 zone_free(z);
2796 2796 return;
2797 2797 }
2798 2798 /*
2799 2799 * If zone_destroy is waiting for the cred references to drain
2800 2800 * out, and they have, signal it.
2801 2801 */
2802 2802 wakeup = (zone_wait_for_cred && ZONE_IS_UNREF(z) &&
2803 2803 zone_status_get(z) >= ZONE_IS_DEAD);
2804 2804 mutex_exit(&z->zone_lock);
2805 2805
2806 2806 if (wakeup) {
2807 2807 /*
2808 2808 * Grabbing zonehash_lock here effectively synchronizes with
2809 2809 * zone_destroy() to avoid missed signals.
2810 2810 */
2811 2811 mutex_enter(&zonehash_lock);
2812 2812 cv_broadcast(&zone_destroy_cv);
2813 2813 mutex_exit(&zonehash_lock);
2814 2814 }
2815 2815 }
2816 2816
2817 2817 void
2818 2818 zone_task_hold(zone_t *z)
2819 2819 {
2820 2820 mutex_enter(&z->zone_lock);
2821 2821 z->zone_ntasks++;
2822 2822 ASSERT(z->zone_ntasks != 0);
2823 2823 mutex_exit(&z->zone_lock);
2824 2824 }
2825 2825
2826 2826 void
2827 2827 zone_task_rele(zone_t *zone)
2828 2828 {
2829 2829 uint_t refcnt;
2830 2830
2831 2831 mutex_enter(&zone->zone_lock);
2832 2832 ASSERT(zone->zone_ntasks != 0);
2833 2833 refcnt = --zone->zone_ntasks;
2834 2834 if (refcnt > 1) { /* Common case */
2835 2835 mutex_exit(&zone->zone_lock);
2836 2836 return;
2837 2837 }
2838 2838 zone_hold_locked(zone); /* so we can use the zone_t later */
2839 2839 mutex_exit(&zone->zone_lock);
2840 2840 if (refcnt == 1) {
2841 2841 /*
2842 2842 * See if the zone is shutting down.
2843 2843 */
2844 2844 mutex_enter(&zone_status_lock);
2845 2845 if (zone_status_get(zone) != ZONE_IS_SHUTTING_DOWN) {
2846 2846 goto out;
2847 2847 }
2848 2848
2849 2849 /*
2850 2850 * Make sure the ntasks didn't change since we
2851 2851 * dropped zone_lock.
2852 2852 */
2853 2853 mutex_enter(&zone->zone_lock);
2854 2854 if (refcnt != zone->zone_ntasks) {
2855 2855 mutex_exit(&zone->zone_lock);
2856 2856 goto out;
2857 2857 }
2858 2858 mutex_exit(&zone->zone_lock);
2859 2859
2860 2860 /*
2861 2861 * No more user processes in the zone. The zone is empty.
2862 2862 */
2863 2863 zone_status_set(zone, ZONE_IS_EMPTY);
2864 2864 goto out;
2865 2865 }
2866 2866
2867 2867 ASSERT(refcnt == 0);
2868 2868 /*
2869 2869 * zsched has exited; the zone is dead.
2870 2870 */
2871 2871 zone->zone_zsched = NULL; /* paranoia */
2872 2872 mutex_enter(&zone_status_lock);
2873 2873 zone_status_set(zone, ZONE_IS_DEAD);
2874 2874 out:
2875 2875 mutex_exit(&zone_status_lock);
2876 2876 zone_rele(zone);
2877 2877 }
2878 2878
2879 2879 zoneid_t
2880 2880 getzoneid(void)
2881 2881 {
2882 2882 return (curproc->p_zone->zone_id);
2883 2883 }
2884 2884
2885 2885 /*
2886 2886 * Internal versions of zone_find_by_*(). These don't zone_hold() or
2887 2887 * check the validity of a zone's state.
2888 2888 */
2889 2889 static zone_t *
2890 2890 zone_find_all_by_id(zoneid_t zoneid)
2891 2891 {
2892 2892 mod_hash_val_t hv;
2893 2893 zone_t *zone = NULL;
2894 2894
2895 2895 ASSERT(MUTEX_HELD(&zonehash_lock));
2896 2896
2897 2897 if (mod_hash_find(zonehashbyid,
2898 2898 (mod_hash_key_t)(uintptr_t)zoneid, &hv) == 0)
2899 2899 zone = (zone_t *)hv;
2900 2900 return (zone);
2901 2901 }
2902 2902
2903 2903 static zone_t *
2904 2904 zone_find_all_by_label(const ts_label_t *label)
2905 2905 {
2906 2906 mod_hash_val_t hv;
2907 2907 zone_t *zone = NULL;
2908 2908
2909 2909 ASSERT(MUTEX_HELD(&zonehash_lock));
2910 2910
2911 2911 /*
2912 2912 * zonehashbylabel is not maintained for unlabeled systems
2913 2913 */
2914 2914 if (!is_system_labeled())
2915 2915 return (NULL);
2916 2916 if (mod_hash_find(zonehashbylabel, (mod_hash_key_t)label, &hv) == 0)
2917 2917 zone = (zone_t *)hv;
2918 2918 return (zone);
2919 2919 }
2920 2920
2921 2921 static zone_t *
2922 2922 zone_find_all_by_name(char *name)
2923 2923 {
2924 2924 mod_hash_val_t hv;
2925 2925 zone_t *zone = NULL;
2926 2926
2927 2927 ASSERT(MUTEX_HELD(&zonehash_lock));
2928 2928
2929 2929 if (mod_hash_find(zonehashbyname, (mod_hash_key_t)name, &hv) == 0)
2930 2930 zone = (zone_t *)hv;
2931 2931 return (zone);
2932 2932 }
2933 2933
2934 2934 /*
2935 2935 * Public interface for looking up a zone by zoneid. Only returns the zone if
2936 2936 * it is fully initialized, and has not yet begun the zone_destroy() sequence.
2937 2937 * Caller must call zone_rele() once it is done with the zone.
2938 2938 *
2939 2939 * The zone may begin the zone_destroy() sequence immediately after this
2940 2940 * function returns, but may be safely used until zone_rele() is called.
2941 2941 */
2942 2942 zone_t *
2943 2943 zone_find_by_id(zoneid_t zoneid)
2944 2944 {
2945 2945 zone_t *zone;
2946 2946 zone_status_t status;
2947 2947
2948 2948 mutex_enter(&zonehash_lock);
2949 2949 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
2950 2950 mutex_exit(&zonehash_lock);
2951 2951 return (NULL);
2952 2952 }
2953 2953 status = zone_status_get(zone);
2954 2954 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) {
2955 2955 /*
2956 2956 * For all practical purposes the zone doesn't exist.
2957 2957 */
2958 2958 mutex_exit(&zonehash_lock);
2959 2959 return (NULL);
2960 2960 }
2961 2961 zone_hold(zone);
2962 2962 mutex_exit(&zonehash_lock);
2963 2963 return (zone);
2964 2964 }
2965 2965
2966 2966 /*
2967 2967 * Similar to zone_find_by_id, but using zone label as the key.
2968 2968 */
2969 2969 zone_t *
2970 2970 zone_find_by_label(const ts_label_t *label)
2971 2971 {
2972 2972 zone_t *zone;
2973 2973 zone_status_t status;
2974 2974
2975 2975 mutex_enter(&zonehash_lock);
2976 2976 if ((zone = zone_find_all_by_label(label)) == NULL) {
2977 2977 mutex_exit(&zonehash_lock);
2978 2978 return (NULL);
2979 2979 }
2980 2980
2981 2981 status = zone_status_get(zone);
2982 2982 if (status > ZONE_IS_DOWN) {
2983 2983 /*
2984 2984 * For all practical purposes the zone doesn't exist.
2985 2985 */
2986 2986 mutex_exit(&zonehash_lock);
2987 2987 return (NULL);
2988 2988 }
2989 2989 zone_hold(zone);
2990 2990 mutex_exit(&zonehash_lock);
2991 2991 return (zone);
2992 2992 }
2993 2993
2994 2994 /*
2995 2995 * Similar to zone_find_by_id, but using zone name as the key.
2996 2996 */
2997 2997 zone_t *
2998 2998 zone_find_by_name(char *name)
2999 2999 {
3000 3000 zone_t *zone;
3001 3001 zone_status_t status;
3002 3002
3003 3003 mutex_enter(&zonehash_lock);
3004 3004 if ((zone = zone_find_all_by_name(name)) == NULL) {
3005 3005 mutex_exit(&zonehash_lock);
3006 3006 return (NULL);
3007 3007 }
3008 3008 status = zone_status_get(zone);
3009 3009 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) {
3010 3010 /*
3011 3011 * For all practical purposes the zone doesn't exist.
3012 3012 */
3013 3013 mutex_exit(&zonehash_lock);
3014 3014 return (NULL);
3015 3015 }
3016 3016 zone_hold(zone);
3017 3017 mutex_exit(&zonehash_lock);
3018 3018 return (zone);
3019 3019 }
3020 3020
3021 3021 /*
3022 3022 * Similar to zone_find_by_id(), using the path as a key. For instance,
3023 3023 * if there is a zone "foo" rooted at /foo/root, and the path argument
3024 3024 * is "/foo/root/proc", it will return the held zone_t corresponding to
3025 3025 * zone "foo".
3026 3026 *
3027 3027 * zone_find_by_path() always returns a non-NULL value, since at the
3028 3028 * very least every path will be contained in the global zone.
3029 3029 *
3030 3030 * As with the other zone_find_by_*() functions, the caller is
3031 3031 * responsible for zone_rele()ing the return value of this function.
3032 3032 */
3033 3033 zone_t *
3034 3034 zone_find_by_path(const char *path)
3035 3035 {
3036 3036 zone_t *zone;
3037 3037 zone_t *zret = NULL;
3038 3038 zone_status_t status;
3039 3039
3040 3040 if (path == NULL) {
3041 3041 /*
3042 3042 * Call from rootconf().
3043 3043 */
3044 3044 zone_hold(global_zone);
3045 3045 return (global_zone);
3046 3046 }
3047 3047 ASSERT(*path == '/');
3048 3048 mutex_enter(&zonehash_lock);
3049 3049 for (zone = list_head(&zone_active); zone != NULL;
3050 3050 zone = list_next(&zone_active, zone)) {
3051 3051 if (ZONE_PATH_VISIBLE(path, zone))
3052 3052 zret = zone;
3053 3053 }
3054 3054 ASSERT(zret != NULL);
3055 3055 status = zone_status_get(zret);
3056 3056 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) {
3057 3057 /*
3058 3058 * Zone practically doesn't exist.
3059 3059 */
3060 3060 zret = global_zone;
3061 3061 }
3062 3062 zone_hold(zret);
3063 3063 mutex_exit(&zonehash_lock);
3064 3064 return (zret);
3065 3065 }
3066 3066
3067 3067 /*
3068 3068 * Public interface for updating per-zone load averages. Called once per
3069 3069 * second.
3070 3070 *
3071 3071 * Based on loadavg_update(), genloadavg() and calcloadavg() from clock.c.
3072 3072 */
3073 3073 void
3074 3074 zone_loadavg_update()
3075 3075 {
3076 3076 zone_t *zp;
3077 3077 zone_status_t status;
3078 3078 struct loadavg_s *lavg;
3079 3079 hrtime_t zone_total;
3080 3080 int i;
3081 3081 hrtime_t hr_avg;
3082 3082 int nrun;
3083 3083 static int64_t f[3] = { 135, 27, 9 };
3084 3084 int64_t q, r;
3085 3085
3086 3086 mutex_enter(&zonehash_lock);
3087 3087 for (zp = list_head(&zone_active); zp != NULL;
3088 3088 zp = list_next(&zone_active, zp)) {
3089 3089 mutex_enter(&zp->zone_lock);
3090 3090
3091 3091 /* Skip zones that are on the way down or not yet up */
3092 3092 status = zone_status_get(zp);
3093 3093 if (status < ZONE_IS_READY || status >= ZONE_IS_DOWN) {
3094 3094 /* For all practical purposes the zone doesn't exist. */
3095 3095 mutex_exit(&zp->zone_lock);
3096 3096 continue;
3097 3097 }
3098 3098
3099 3099 /*
3100 3100 * Update the 10 second moving average data in zone_loadavg.
3101 3101 */
3102 3102 lavg = &zp->zone_loadavg;
3103 3103
3104 3104 zone_total = zp->zone_utime + zp->zone_stime + zp->zone_wtime;
3105 3105 scalehrtime(&zone_total);
3106 3106
3107 3107 /* The zone_total should always be increasing. */
3108 3108 lavg->lg_loads[lavg->lg_cur] = (zone_total > lavg->lg_total) ?
3109 3109 zone_total - lavg->lg_total : 0;
3110 3110 lavg->lg_cur = (lavg->lg_cur + 1) % S_LOADAVG_SZ;
3111 3111 /* lg_total holds the prev. 1 sec. total */
3112 3112 lavg->lg_total = zone_total;
3113 3113
3114 3114 /*
3115 3115 * To simplify the calculation, we don't calculate the load avg.
3116 3116 * until the zone has been up for at least 10 seconds and our
3117 3117 * moving average is thus full.
3118 3118 */
3119 3119 if ((lavg->lg_len + 1) < S_LOADAVG_SZ) {
3120 3120 lavg->lg_len++;
3121 3121 mutex_exit(&zp->zone_lock);
3122 3122 continue;
3123 3123 }
3124 3124
3125 3125 /* Now calculate the 1min, 5min, 15 min load avg. */
3126 3126 hr_avg = 0;
3127 3127 for (i = 0; i < S_LOADAVG_SZ; i++)
3128 3128 hr_avg += lavg->lg_loads[i];
3129 3129 hr_avg = hr_avg / S_LOADAVG_SZ;
3130 3130 nrun = hr_avg / (NANOSEC / LGRP_LOADAVG_IN_THREAD_MAX);
3131 3131
3132 3132 /* Compute load avg. See comment in calcloadavg() */
3133 3133 for (i = 0; i < 3; i++) {
3134 3134 q = (zp->zone_hp_avenrun[i] >> 16) << 7;
3135 3135 r = (zp->zone_hp_avenrun[i] & 0xffff) << 7;
3136 3136 zp->zone_hp_avenrun[i] +=
3137 3137 ((nrun - q) * f[i] - ((r * f[i]) >> 16)) >> 4;
3138 3138
3139 3139 /* avenrun[] can only hold 31 bits of load avg. */
3140 3140 if (zp->zone_hp_avenrun[i] <
3141 3141 ((uint64_t)1<<(31+16-FSHIFT)))
3142 3142 zp->zone_avenrun[i] = (int32_t)
3143 3143 (zp->zone_hp_avenrun[i] >> (16 - FSHIFT));
3144 3144 else
3145 3145 zp->zone_avenrun[i] = 0x7fffffff;
3146 3146 }
3147 3147
3148 3148 mutex_exit(&zp->zone_lock);
3149 3149 }
3150 3150 mutex_exit(&zonehash_lock);
3151 3151 }
3152 3152
3153 3153 /*
3154 3154 * Get the number of cpus visible to this zone. The system-wide global
3155 3155 * 'ncpus' is returned if pools are disabled, the caller is in the
3156 3156 * global zone, or a NULL zone argument is passed in.
3157 3157 */
3158 3158 int
3159 3159 zone_ncpus_get(zone_t *zone)
3160 3160 {
3161 3161 int myncpus = zone == NULL ? 0 : zone->zone_ncpus;
3162 3162
3163 3163 return (myncpus != 0 ? myncpus : ncpus);
3164 3164 }
3165 3165
3166 3166 /*
3167 3167 * Get the number of online cpus visible to this zone. The system-wide
3168 3168 * global 'ncpus_online' is returned if pools are disabled, the caller
3169 3169 * is in the global zone, or a NULL zone argument is passed in.
3170 3170 */
3171 3171 int
3172 3172 zone_ncpus_online_get(zone_t *zone)
3173 3173 {
3174 3174 int myncpus_online = zone == NULL ? 0 : zone->zone_ncpus_online;
3175 3175
3176 3176 return (myncpus_online != 0 ? myncpus_online : ncpus_online);
3177 3177 }
3178 3178
3179 3179 /*
3180 3180 * Return the pool to which the zone is currently bound.
3181 3181 */
3182 3182 pool_t *
3183 3183 zone_pool_get(zone_t *zone)
3184 3184 {
3185 3185 ASSERT(pool_lock_held());
3186 3186
3187 3187 return (zone->zone_pool);
3188 3188 }
3189 3189
3190 3190 /*
3191 3191 * Set the zone's pool pointer and update the zone's visibility to match
3192 3192 * the resources in the new pool.
3193 3193 */
3194 3194 void
3195 3195 zone_pool_set(zone_t *zone, pool_t *pool)
3196 3196 {
3197 3197 ASSERT(pool_lock_held());
3198 3198 ASSERT(MUTEX_HELD(&cpu_lock));
3199 3199
3200 3200 zone->zone_pool = pool;
3201 3201 zone_pset_set(zone, pool->pool_pset->pset_id);
3202 3202 }
3203 3203
3204 3204 /*
3205 3205 * Return the cached value of the id of the processor set to which the
3206 3206 * zone is currently bound. The value will be ZONE_PS_INVAL if the pools
3207 3207 * facility is disabled.
3208 3208 */
3209 3209 psetid_t
3210 3210 zone_pset_get(zone_t *zone)
3211 3211 {
3212 3212 ASSERT(MUTEX_HELD(&cpu_lock));
3213 3213
3214 3214 return (zone->zone_psetid);
3215 3215 }
3216 3216
3217 3217 /*
3218 3218 * Set the cached value of the id of the processor set to which the zone
3219 3219 * is currently bound. Also update the zone's visibility to match the
3220 3220 * resources in the new processor set.
3221 3221 */
3222 3222 void
3223 3223 zone_pset_set(zone_t *zone, psetid_t newpsetid)
3224 3224 {
3225 3225 psetid_t oldpsetid;
3226 3226
3227 3227 ASSERT(MUTEX_HELD(&cpu_lock));
3228 3228 oldpsetid = zone_pset_get(zone);
3229 3229
3230 3230 if (oldpsetid == newpsetid)
3231 3231 return;
3232 3232 /*
3233 3233 * Global zone sees all.
3234 3234 */
3235 3235 if (zone != global_zone) {
3236 3236 zone->zone_psetid = newpsetid;
3237 3237 if (newpsetid != ZONE_PS_INVAL)
3238 3238 pool_pset_visibility_add(newpsetid, zone);
3239 3239 if (oldpsetid != ZONE_PS_INVAL)
3240 3240 pool_pset_visibility_remove(oldpsetid, zone);
3241 3241 }
3242 3242 /*
3243 3243 * Disabling pools, so we should start using the global values
3244 3244 * for ncpus and ncpus_online.
3245 3245 */
3246 3246 if (newpsetid == ZONE_PS_INVAL) {
3247 3247 zone->zone_ncpus = 0;
3248 3248 zone->zone_ncpus_online = 0;
3249 3249 }
3250 3250 }
3251 3251
3252 3252 /*
3253 3253 * Walk the list of active zones and issue the provided callback for
3254 3254 * each of them.
3255 3255 *
3256 3256 * Caller must not be holding any locks that may be acquired under
3257 3257 * zonehash_lock. See comment at the beginning of the file for a list of
3258 3258 * common locks and their interactions with zones.
3259 3259 */
3260 3260 int
3261 3261 zone_walk(int (*cb)(zone_t *, void *), void *data)
3262 3262 {
3263 3263 zone_t *zone;
3264 3264 int ret = 0;
3265 3265 zone_status_t status;
3266 3266
3267 3267 mutex_enter(&zonehash_lock);
3268 3268 for (zone = list_head(&zone_active); zone != NULL;
3269 3269 zone = list_next(&zone_active, zone)) {
3270 3270 /*
3271 3271 * Skip zones that shouldn't be externally visible.
3272 3272 */
3273 3273 status = zone_status_get(zone);
3274 3274 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN)
3275 3275 continue;
3276 3276 /*
3277 3277 * Bail immediately if any callback invocation returns a
3278 3278 * non-zero value.
3279 3279 */
3280 3280 ret = (*cb)(zone, data);
3281 3281 if (ret != 0)
3282 3282 break;
3283 3283 }
3284 3284 mutex_exit(&zonehash_lock);
3285 3285 return (ret);
3286 3286 }
3287 3287
3288 3288 static int
3289 3289 zone_set_root(zone_t *zone, const char *upath)
3290 3290 {
3291 3291 vnode_t *vp;
3292 3292 int trycount;
3293 3293 int error = 0;
3294 3294 char *path;
3295 3295 struct pathname upn, pn;
3296 3296 size_t pathlen;
3297 3297
3298 3298 if ((error = pn_get((char *)upath, UIO_USERSPACE, &upn)) != 0)
3299 3299 return (error);
3300 3300
3301 3301 pn_alloc(&pn);
3302 3302
3303 3303 /* prevent infinite loop */
3304 3304 trycount = 10;
3305 3305 for (;;) {
3306 3306 if (--trycount <= 0) {
3307 3307 error = ESTALE;
3308 3308 goto out;
3309 3309 }
3310 3310
3311 3311 if ((error = lookuppn(&upn, &pn, FOLLOW, NULLVPP, &vp)) == 0) {
3312 3312 /*
3313 3313 * VOP_ACCESS() may cover 'vp' with a new
3314 3314 * filesystem, if 'vp' is an autoFS vnode.
3315 3315 * Get the new 'vp' if so.
3316 3316 */
3317 3317 if ((error =
3318 3318 VOP_ACCESS(vp, VEXEC, 0, CRED(), NULL)) == 0 &&
3319 3319 (!vn_ismntpt(vp) ||
3320 3320 (error = traverse(&vp)) == 0)) {
3321 3321 pathlen = pn.pn_pathlen + 2;
3322 3322 path = kmem_alloc(pathlen, KM_SLEEP);
3323 3323 (void) strncpy(path, pn.pn_path,
3324 3324 pn.pn_pathlen + 1);
3325 3325 path[pathlen - 2] = '/';
3326 3326 path[pathlen - 1] = '\0';
3327 3327 pn_free(&pn);
3328 3328 pn_free(&upn);
3329 3329
3330 3330 /* Success! */
3331 3331 break;
3332 3332 }
3333 3333 VN_RELE(vp);
3334 3334 }
3335 3335 if (error != ESTALE)
3336 3336 goto out;
3337 3337 }
3338 3338
3339 3339 ASSERT(error == 0);
3340 3340 zone->zone_rootvp = vp; /* we hold a reference to vp */
3341 3341 zone->zone_rootpath = path;
3342 3342 zone->zone_rootpathlen = pathlen;
3343 3343 if (pathlen > 5 && strcmp(path + pathlen - 5, "/lu/") == 0)
3344 3344 zone->zone_flags |= ZF_IS_SCRATCH;
3345 3345 return (0);
3346 3346
3347 3347 out:
3348 3348 pn_free(&pn);
3349 3349 pn_free(&upn);
3350 3350 return (error);
3351 3351 }
3352 3352
3353 3353 #define isalnum(c) (((c) >= '0' && (c) <= '9') || \
3354 3354 ((c) >= 'a' && (c) <= 'z') || \
3355 3355 ((c) >= 'A' && (c) <= 'Z'))
3356 3356
3357 3357 static int
3358 3358 zone_set_name(zone_t *zone, const char *uname)
3359 3359 {
3360 3360 char *kname = kmem_zalloc(ZONENAME_MAX, KM_SLEEP);
3361 3361 size_t len;
3362 3362 int i, err;
3363 3363
3364 3364 if ((err = copyinstr(uname, kname, ZONENAME_MAX, &len)) != 0) {
3365 3365 kmem_free(kname, ZONENAME_MAX);
3366 3366 return (err); /* EFAULT or ENAMETOOLONG */
3367 3367 }
3368 3368
3369 3369 /* must be less than ZONENAME_MAX */
3370 3370 if (len == ZONENAME_MAX && kname[ZONENAME_MAX - 1] != '\0') {
3371 3371 kmem_free(kname, ZONENAME_MAX);
3372 3372 return (EINVAL);
3373 3373 }
3374 3374
3375 3375 /*
3376 3376 * Name must start with an alphanumeric and must contain only
3377 3377 * alphanumerics, '-', '_' and '.'.
3378 3378 */
3379 3379 if (!isalnum(kname[0])) {
3380 3380 kmem_free(kname, ZONENAME_MAX);
3381 3381 return (EINVAL);
3382 3382 }
3383 3383 for (i = 1; i < len - 1; i++) {
3384 3384 if (!isalnum(kname[i]) && kname[i] != '-' && kname[i] != '_' &&
3385 3385 kname[i] != '.') {
3386 3386 kmem_free(kname, ZONENAME_MAX);
3387 3387 return (EINVAL);
3388 3388 }
3389 3389 }
3390 3390
3391 3391 zone->zone_name = kname;
3392 3392 return (0);
3393 3393 }
3394 3394
3395 3395 /*
3396 3396 * Gets the 32-bit hostid of the specified zone as an unsigned int. If 'zonep'
3397 3397 * is NULL or it points to a zone with no hostid emulation, then the machine's
3398 3398 * hostid (i.e., the global zone's hostid) is returned. This function returns
3399 3399 * zero if neither the zone nor the host machine (global zone) have hostids. It
3400 3400 * returns HW_INVALID_HOSTID if the function attempts to return the machine's
3401 3401 * hostid and the machine's hostid is invalid.
3402 3402 */
3403 3403 uint32_t
3404 3404 zone_get_hostid(zone_t *zonep)
3405 3405 {
3406 3406 unsigned long machine_hostid;
3407 3407
3408 3408 if (zonep == NULL || zonep->zone_hostid == HW_INVALID_HOSTID) {
3409 3409 if (ddi_strtoul(hw_serial, NULL, 10, &machine_hostid) != 0)
3410 3410 return (HW_INVALID_HOSTID);
3411 3411 return ((uint32_t)machine_hostid);
3412 3412 }
3413 3413 return (zonep->zone_hostid);
3414 3414 }
3415 3415
3416 3416 /*
3417 3417 * Similar to thread_create(), but makes sure the thread is in the appropriate
3418 3418 * zone's zsched process (curproc->p_zone->zone_zsched) before returning.
3419 3419 */
3420 3420 /*ARGSUSED*/
3421 3421 kthread_t *
3422 3422 zthread_create(
3423 3423 caddr_t stk,
3424 3424 size_t stksize,
3425 3425 void (*proc)(),
3426 3426 void *arg,
3427 3427 size_t len,
3428 3428 pri_t pri)
3429 3429 {
3430 3430 kthread_t *t;
3431 3431 zone_t *zone = curproc->p_zone;
3432 3432 proc_t *pp = zone->zone_zsched;
3433 3433
3434 3434 zone_hold(zone); /* Reference to be dropped when thread exits */
3435 3435
3436 3436 /*
3437 3437 * No-one should be trying to create threads if the zone is shutting
3438 3438 * down and there aren't any kernel threads around. See comment
3439 3439 * in zthread_exit().
3440 3440 */
3441 3441 ASSERT(!(zone->zone_kthreads == NULL &&
3442 3442 zone_status_get(zone) >= ZONE_IS_EMPTY));
3443 3443 /*
3444 3444 * Create a thread, but don't let it run until we've finished setting
3445 3445 * things up.
3446 3446 */
3447 3447 t = thread_create(stk, stksize, proc, arg, len, pp, TS_STOPPED, pri);
3448 3448 ASSERT(t->t_forw == NULL);
3449 3449 mutex_enter(&zone_status_lock);
3450 3450 if (zone->zone_kthreads == NULL) {
3451 3451 t->t_forw = t->t_back = t;
3452 3452 } else {
3453 3453 kthread_t *tx = zone->zone_kthreads;
3454 3454
3455 3455 t->t_forw = tx;
3456 3456 t->t_back = tx->t_back;
3457 3457 tx->t_back->t_forw = t;
3458 3458 tx->t_back = t;
3459 3459 }
3460 3460 zone->zone_kthreads = t;
3461 3461 mutex_exit(&zone_status_lock);
3462 3462
3463 3463 mutex_enter(&pp->p_lock);
3464 3464 t->t_proc_flag |= TP_ZTHREAD;
3465 3465 project_rele(t->t_proj);
3466 3466 t->t_proj = project_hold(pp->p_task->tk_proj);
3467 3467
3468 3468 /*
3469 3469 * Setup complete, let it run.
3470 3470 */
3471 3471 thread_lock(t);
3472 3472 t->t_schedflag |= TS_ALLSTART;
3473 3473 setrun_locked(t);
3474 3474 thread_unlock(t);
3475 3475
3476 3476 mutex_exit(&pp->p_lock);
3477 3477
3478 3478 return (t);
3479 3479 }
3480 3480
3481 3481 /*
3482 3482 * Similar to thread_exit(). Must be called by threads created via
3483 3483 * zthread_exit().
3484 3484 */
3485 3485 void
3486 3486 zthread_exit(void)
3487 3487 {
3488 3488 kthread_t *t = curthread;
3489 3489 proc_t *pp = curproc;
3490 3490 zone_t *zone = pp->p_zone;
3491 3491
3492 3492 mutex_enter(&zone_status_lock);
3493 3493
3494 3494 /*
3495 3495 * Reparent to p0
3496 3496 */
3497 3497 kpreempt_disable();
3498 3498 mutex_enter(&pp->p_lock);
3499 3499 t->t_proc_flag &= ~TP_ZTHREAD;
3500 3500 t->t_procp = &p0;
3501 3501 hat_thread_exit(t);
3502 3502 mutex_exit(&pp->p_lock);
3503 3503 kpreempt_enable();
3504 3504
3505 3505 if (t->t_back == t) {
3506 3506 ASSERT(t->t_forw == t);
3507 3507 /*
3508 3508 * If the zone is empty, once the thread count
3509 3509 * goes to zero no further kernel threads can be
3510 3510 * created. This is because if the creator is a process
3511 3511 * in the zone, then it must have exited before the zone
3512 3512 * state could be set to ZONE_IS_EMPTY.
3513 3513 * Otherwise, if the creator is a kernel thread in the
3514 3514 * zone, the thread count is non-zero.
3515 3515 *
3516 3516 * This really means that non-zone kernel threads should
3517 3517 * not create zone kernel threads.
3518 3518 */
3519 3519 zone->zone_kthreads = NULL;
3520 3520 if (zone_status_get(zone) == ZONE_IS_EMPTY) {
3521 3521 zone_status_set(zone, ZONE_IS_DOWN);
3522 3522 /*
3523 3523 * Remove any CPU caps on this zone.
3524 3524 */
3525 3525 cpucaps_zone_remove(zone);
3526 3526 }
3527 3527 } else {
3528 3528 t->t_forw->t_back = t->t_back;
3529 3529 t->t_back->t_forw = t->t_forw;
3530 3530 if (zone->zone_kthreads == t)
3531 3531 zone->zone_kthreads = t->t_forw;
3532 3532 }
3533 3533 mutex_exit(&zone_status_lock);
3534 3534 zone_rele(zone);
3535 3535 thread_exit();
3536 3536 /* NOTREACHED */
3537 3537 }
3538 3538
3539 3539 static void
3540 3540 zone_chdir(vnode_t *vp, vnode_t **vpp, proc_t *pp)
3541 3541 {
3542 3542 vnode_t *oldvp;
3543 3543
3544 3544 /* we're going to hold a reference here to the directory */
3545 3545 VN_HOLD(vp);
3546 3546
3547 3547 /* update abs cwd/root path see c2/audit.c */
3548 3548 if (AU_AUDITING())
3549 3549 audit_chdirec(vp, vpp);
3550 3550
3551 3551 mutex_enter(&pp->p_lock);
3552 3552 oldvp = *vpp;
3553 3553 *vpp = vp;
3554 3554 mutex_exit(&pp->p_lock);
3555 3555 if (oldvp != NULL)
3556 3556 VN_RELE(oldvp);
3557 3557 }
3558 3558
3559 3559 /*
3560 3560 * Convert an rctl value represented by an nvlist_t into an rctl_val_t.
3561 3561 */
3562 3562 static int
3563 3563 nvlist2rctlval(nvlist_t *nvl, rctl_val_t *rv)
3564 3564 {
3565 3565 nvpair_t *nvp = NULL;
3566 3566 boolean_t priv_set = B_FALSE;
3567 3567 boolean_t limit_set = B_FALSE;
3568 3568 boolean_t action_set = B_FALSE;
3569 3569
3570 3570 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
3571 3571 const char *name;
3572 3572 uint64_t ui64;
3573 3573
3574 3574 name = nvpair_name(nvp);
3575 3575 if (nvpair_type(nvp) != DATA_TYPE_UINT64)
3576 3576 return (EINVAL);
3577 3577 (void) nvpair_value_uint64(nvp, &ui64);
3578 3578 if (strcmp(name, "privilege") == 0) {
3579 3579 /*
3580 3580 * Currently only privileged values are allowed, but
3581 3581 * this may change in the future.
3582 3582 */
3583 3583 if (ui64 != RCPRIV_PRIVILEGED)
3584 3584 return (EINVAL);
3585 3585 rv->rcv_privilege = ui64;
3586 3586 priv_set = B_TRUE;
3587 3587 } else if (strcmp(name, "limit") == 0) {
3588 3588 rv->rcv_value = ui64;
3589 3589 limit_set = B_TRUE;
3590 3590 } else if (strcmp(name, "action") == 0) {
3591 3591 if (ui64 != RCTL_LOCAL_NOACTION &&
3592 3592 ui64 != RCTL_LOCAL_DENY)
3593 3593 return (EINVAL);
3594 3594 rv->rcv_flagaction = ui64;
3595 3595 action_set = B_TRUE;
3596 3596 } else {
3597 3597 return (EINVAL);
3598 3598 }
3599 3599 }
3600 3600
3601 3601 if (!(priv_set && limit_set && action_set))
3602 3602 return (EINVAL);
3603 3603 rv->rcv_action_signal = 0;
3604 3604 rv->rcv_action_recipient = NULL;
3605 3605 rv->rcv_action_recip_pid = -1;
3606 3606 rv->rcv_firing_time = 0;
3607 3607
3608 3608 return (0);
3609 3609 }
3610 3610
3611 3611 /*
3612 3612 * Non-global zone version of start_init.
3613 3613 */
3614 3614 void
3615 3615 zone_start_init(void)
3616 3616 {
3617 3617 proc_t *p = ttoproc(curthread);
3618 3618 zone_t *z = p->p_zone;
3619 3619
3620 3620 ASSERT(!INGLOBALZONE(curproc));
3621 3621
3622 3622 /*
3623 3623 * For all purposes (ZONE_ATTR_INITPID and restart_init),
3624 3624 * storing just the pid of init is sufficient.
3625 3625 */
3626 3626 z->zone_proc_initpid = p->p_pid;
3627 3627
3628 3628 /*
3629 3629 * We maintain zone_boot_err so that we can return the cause of the
3630 3630 * failure back to the caller of the zone_boot syscall.
3631 3631 */
3632 3632 p->p_zone->zone_boot_err = start_init_common();
3633 3633
3634 3634 /*
3635 3635 * We will prevent booting zones from becoming running zones if the
3636 3636 * global zone is shutting down.
3637 3637 */
3638 3638 mutex_enter(&zone_status_lock);
3639 3639 if (z->zone_boot_err != 0 || zone_status_get(global_zone) >=
3640 3640 ZONE_IS_SHUTTING_DOWN) {
3641 3641 /*
3642 3642 * Make sure we are still in the booting state-- we could have
3643 3643 * raced and already be shutting down, or even further along.
3644 3644 */
3645 3645 if (zone_status_get(z) == ZONE_IS_BOOTING) {
3646 3646 zone_status_set(z, ZONE_IS_SHUTTING_DOWN);
3647 3647 }
3648 3648 mutex_exit(&zone_status_lock);
3649 3649 /* It's gone bad, dispose of the process */
3650 3650 if (proc_exit(CLD_EXITED, z->zone_boot_err) != 0) {
3651 3651 mutex_enter(&p->p_lock);
3652 3652 ASSERT(p->p_flag & SEXITLWPS);
3653 3653 lwp_exit();
3654 3654 }
3655 3655 } else {
3656 3656 if (zone_status_get(z) == ZONE_IS_BOOTING)
3657 3657 zone_status_set(z, ZONE_IS_RUNNING);
3658 3658 mutex_exit(&zone_status_lock);
3659 3659 /* cause the process to return to userland. */
3660 3660 lwp_rtt();
3661 3661 }
3662 3662 }
3663 3663
3664 3664 struct zsched_arg {
3665 3665 zone_t *zone;
3666 3666 nvlist_t *nvlist;
3667 3667 };
3668 3668
3669 3669 /*
3670 3670 * Per-zone "sched" workalike. The similarity to "sched" doesn't have
3671 3671 * anything to do with scheduling, but rather with the fact that
3672 3672 * per-zone kernel threads are parented to zsched, just like regular
3673 3673 * kernel threads are parented to sched (p0).
3674 3674 *
3675 3675 * zsched is also responsible for launching init for the zone.
3676 3676 */
3677 3677 static void
3678 3678 zsched(void *arg)
3679 3679 {
3680 3680 struct zsched_arg *za = arg;
3681 3681 proc_t *pp = curproc;
3682 3682 proc_t *initp = proc_init;
3683 3683 zone_t *zone = za->zone;
3684 3684 cred_t *cr, *oldcred;
3685 3685 rctl_set_t *set;
3686 3686 rctl_alloc_gp_t *gp;
3687 3687 contract_t *ct = NULL;
3688 3688 task_t *tk, *oldtk;
3689 3689 rctl_entity_p_t e;
3690 3690 kproject_t *pj;
3691 3691
3692 3692 nvlist_t *nvl = za->nvlist;
3693 3693 nvpair_t *nvp = NULL;
3694 3694
3695 3695 bcopy("zsched", PTOU(pp)->u_psargs, sizeof ("zsched"));
3696 3696 bcopy("zsched", PTOU(pp)->u_comm, sizeof ("zsched"));
3697 3697 PTOU(pp)->u_argc = 0;
3698 3698 PTOU(pp)->u_argv = NULL;
3699 3699 PTOU(pp)->u_envp = NULL;
3700 3700 closeall(P_FINFO(pp));
3701 3701
3702 3702 /*
3703 3703 * We are this zone's "zsched" process. As the zone isn't generally
3704 3704 * visible yet we don't need to grab any locks before initializing its
3705 3705 * zone_proc pointer.
3706 3706 */
3707 3707 zone_hold(zone); /* this hold is released by zone_destroy() */
3708 3708 zone->zone_zsched = pp;
3709 3709 mutex_enter(&pp->p_lock);
3710 3710 pp->p_zone = zone;
3711 3711 mutex_exit(&pp->p_lock);
3712 3712
3713 3713 /*
3714 3714 * Disassociate process from its 'parent'; parent ourselves to init
3715 3715 * (pid 1) and change other values as needed.
3716 3716 */
3717 3717 sess_create();
3718 3718
3719 3719 mutex_enter(&pidlock);
3720 3720 proc_detach(pp);
3721 3721 pp->p_ppid = 1;
3722 3722 pp->p_flag |= SZONETOP;
3723 3723 pp->p_ancpid = 1;
3724 3724 pp->p_parent = initp;
3725 3725 pp->p_psibling = NULL;
3726 3726 if (initp->p_child)
3727 3727 initp->p_child->p_psibling = pp;
3728 3728 pp->p_sibling = initp->p_child;
3729 3729 initp->p_child = pp;
3730 3730
3731 3731 /* Decrement what newproc() incremented. */
3732 3732 upcount_dec(crgetruid(CRED()), GLOBAL_ZONEID);
3733 3733 /*
3734 3734 * Our credentials are about to become kcred-like, so we don't care
3735 3735 * about the caller's ruid.
3736 3736 */
3737 3737 upcount_inc(crgetruid(kcred), zone->zone_id);
3738 3738 mutex_exit(&pidlock);
3739 3739
3740 3740 /*
3741 3741 * getting out of global zone, so decrement lwp and process counts
3742 3742 */
3743 3743 pj = pp->p_task->tk_proj;
3744 3744 mutex_enter(&global_zone->zone_nlwps_lock);
3745 3745 pj->kpj_nlwps -= pp->p_lwpcnt;
3746 3746 global_zone->zone_nlwps -= pp->p_lwpcnt;
3747 3747 pj->kpj_nprocs--;
3748 3748 global_zone->zone_nprocs--;
3749 3749 mutex_exit(&global_zone->zone_nlwps_lock);
3750 3750
3751 3751 /*
3752 3752 * Decrement locked memory counts on old zone and project.
3753 3753 */
3754 3754 mutex_enter(&global_zone->zone_mem_lock);
3755 3755 global_zone->zone_locked_mem -= pp->p_locked_mem;
3756 3756 pj->kpj_data.kpd_locked_mem -= pp->p_locked_mem;
3757 3757 mutex_exit(&global_zone->zone_mem_lock);
3758 3758
3759 3759 /*
3760 3760 * Create and join a new task in project '0' of this zone.
3761 3761 *
3762 3762 * We don't need to call holdlwps() since we know we're the only lwp in
3763 3763 * this process.
3764 3764 *
3765 3765 * task_join() returns with p_lock held.
3766 3766 */
3767 3767 tk = task_create(0, zone);
3768 3768 mutex_enter(&cpu_lock);
3769 3769 oldtk = task_join(tk, 0);
3770 3770
3771 3771 pj = pp->p_task->tk_proj;
3772 3772
3773 3773 mutex_enter(&zone->zone_mem_lock);
3774 3774 zone->zone_locked_mem += pp->p_locked_mem;
3775 3775 pj->kpj_data.kpd_locked_mem += pp->p_locked_mem;
3776 3776 mutex_exit(&zone->zone_mem_lock);
3777 3777
3778 3778 /*
3779 3779 * add lwp and process counts to zsched's zone, and increment
3780 3780 * project's task and process count due to the task created in
3781 3781 * the above task_create.
3782 3782 */
3783 3783 mutex_enter(&zone->zone_nlwps_lock);
3784 3784 pj->kpj_nlwps += pp->p_lwpcnt;
3785 3785 pj->kpj_ntasks += 1;
3786 3786 zone->zone_nlwps += pp->p_lwpcnt;
3787 3787 pj->kpj_nprocs++;
3788 3788 zone->zone_nprocs++;
3789 3789 mutex_exit(&zone->zone_nlwps_lock);
3790 3790
3791 3791 mutex_exit(&curproc->p_lock);
3792 3792 mutex_exit(&cpu_lock);
3793 3793 task_rele(oldtk);
3794 3794
3795 3795 /*
3796 3796 * The process was created by a process in the global zone, hence the
3797 3797 * credentials are wrong. We might as well have kcred-ish credentials.
3798 3798 */
3799 3799 cr = zone->zone_kcred;
3800 3800 crhold(cr);
3801 3801 mutex_enter(&pp->p_crlock);
3802 3802 oldcred = pp->p_cred;
3803 3803 pp->p_cred = cr;
3804 3804 mutex_exit(&pp->p_crlock);
3805 3805 crfree(oldcred);
3806 3806
3807 3807 /*
3808 3808 * Hold credentials again (for thread)
3809 3809 */
3810 3810 crhold(cr);
3811 3811
3812 3812 /*
3813 3813 * p_lwpcnt can't change since this is a kernel process.
3814 3814 */
3815 3815 crset(pp, cr);
3816 3816
3817 3817 /*
3818 3818 * Chroot
3819 3819 */
3820 3820 zone_chdir(zone->zone_rootvp, &PTOU(pp)->u_cdir, pp);
3821 3821 zone_chdir(zone->zone_rootvp, &PTOU(pp)->u_rdir, pp);
3822 3822
3823 3823 /*
3824 3824 * Initialize zone's rctl set.
3825 3825 */
3826 3826 set = rctl_set_create();
3827 3827 gp = rctl_set_init_prealloc(RCENTITY_ZONE);
3828 3828 mutex_enter(&pp->p_lock);
3829 3829 e.rcep_p.zone = zone;
3830 3830 e.rcep_t = RCENTITY_ZONE;
3831 3831 zone->zone_rctls = rctl_set_init(RCENTITY_ZONE, pp, &e, set, gp);
3832 3832 mutex_exit(&pp->p_lock);
3833 3833 rctl_prealloc_destroy(gp);
3834 3834
3835 3835 /*
3836 3836 * Apply the rctls passed in to zone_create(). This is basically a list
3837 3837 * assignment: all of the old values are removed and the new ones
3838 3838 * inserted. That is, if an empty list is passed in, all values are
3839 3839 * removed.
3840 3840 */
3841 3841 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
3842 3842 rctl_dict_entry_t *rde;
3843 3843 rctl_hndl_t hndl;
3844 3844 char *name;
3845 3845 nvlist_t **nvlarray;
3846 3846 uint_t i, nelem;
3847 3847 int error; /* For ASSERT()s */
3848 3848
3849 3849 name = nvpair_name(nvp);
3850 3850 hndl = rctl_hndl_lookup(name);
3851 3851 ASSERT(hndl != -1);
3852 3852 rde = rctl_dict_lookup_hndl(hndl);
3853 3853 ASSERT(rde != NULL);
3854 3854
3855 3855 for (; /* ever */; ) {
3856 3856 rctl_val_t oval;
3857 3857
3858 3858 mutex_enter(&pp->p_lock);
3859 3859 error = rctl_local_get(hndl, NULL, &oval, pp);
3860 3860 mutex_exit(&pp->p_lock);
3861 3861 ASSERT(error == 0); /* Can't fail for RCTL_FIRST */
3862 3862 ASSERT(oval.rcv_privilege != RCPRIV_BASIC);
3863 3863 if (oval.rcv_privilege == RCPRIV_SYSTEM)
3864 3864 break;
3865 3865 mutex_enter(&pp->p_lock);
3866 3866 error = rctl_local_delete(hndl, &oval, pp);
3867 3867 mutex_exit(&pp->p_lock);
3868 3868 ASSERT(error == 0);
3869 3869 }
3870 3870 error = nvpair_value_nvlist_array(nvp, &nvlarray, &nelem);
3871 3871 ASSERT(error == 0);
3872 3872 for (i = 0; i < nelem; i++) {
3873 3873 rctl_val_t *nvalp;
3874 3874
3875 3875 nvalp = kmem_cache_alloc(rctl_val_cache, KM_SLEEP);
3876 3876 error = nvlist2rctlval(nvlarray[i], nvalp);
3877 3877 ASSERT(error == 0);
3878 3878 /*
3879 3879 * rctl_local_insert can fail if the value being
3880 3880 * inserted is a duplicate; this is OK.
3881 3881 */
3882 3882 mutex_enter(&pp->p_lock);
3883 3883 if (rctl_local_insert(hndl, nvalp, pp) != 0)
3884 3884 kmem_cache_free(rctl_val_cache, nvalp);
3885 3885 mutex_exit(&pp->p_lock);
3886 3886 }
3887 3887 }
3888 3888 /*
3889 3889 * Tell the world that we're done setting up.
3890 3890 *
3891 3891 * At this point we want to set the zone status to ZONE_IS_INITIALIZED
3892 3892 * and atomically set the zone's processor set visibility. Once
3893 3893 * we drop pool_lock() this zone will automatically get updated
3894 3894 * to reflect any future changes to the pools configuration.
3895 3895 *
3896 3896 * Note that after we drop the locks below (zonehash_lock in
3897 3897 * particular) other operations such as a zone_getattr call can
3898 3898 * now proceed and observe the zone. That is the reason for doing a
3899 3899 * state transition to the INITIALIZED state.
3900 3900 */
3901 3901 pool_lock();
3902 3902 mutex_enter(&cpu_lock);
3903 3903 mutex_enter(&zonehash_lock);
3904 3904 zone_uniqid(zone);
3905 3905 zone_zsd_configure(zone);
3906 3906 if (pool_state == POOL_ENABLED)
3907 3907 zone_pset_set(zone, pool_default->pool_pset->pset_id);
3908 3908 mutex_enter(&zone_status_lock);
3909 3909 ASSERT(zone_status_get(zone) == ZONE_IS_UNINITIALIZED);
3910 3910 zone_status_set(zone, ZONE_IS_INITIALIZED);
3911 3911 mutex_exit(&zone_status_lock);
3912 3912 mutex_exit(&zonehash_lock);
3913 3913 mutex_exit(&cpu_lock);
3914 3914 pool_unlock();
3915 3915
3916 3916 /* Now call the create callback for this key */
3917 3917 zsd_apply_all_keys(zsd_apply_create, zone);
3918 3918
3919 3919 /* The callbacks are complete. Mark ZONE_IS_READY */
3920 3920 mutex_enter(&zone_status_lock);
3921 3921 ASSERT(zone_status_get(zone) == ZONE_IS_INITIALIZED);
3922 3922 zone_status_set(zone, ZONE_IS_READY);
3923 3923 mutex_exit(&zone_status_lock);
3924 3924
3925 3925 /*
3926 3926 * Once we see the zone transition to the ZONE_IS_BOOTING state,
3927 3927 * we launch init, and set the state to running.
3928 3928 */
3929 3929 zone_status_wait_cpr(zone, ZONE_IS_BOOTING, "zsched");
3930 3930
3931 3931 if (zone_status_get(zone) == ZONE_IS_BOOTING) {
3932 3932 id_t cid;
3933 3933
3934 3934 /*
3935 3935 * Ok, this is a little complicated. We need to grab the
3936 3936 * zone's pool's scheduling class ID; note that by now, we
3937 3937 * are already bound to a pool if we need to be (zoneadmd
3938 3938 * will have done that to us while we're in the READY
3939 3939 * state). *But* the scheduling class for the zone's 'init'
3940 3940 * must be explicitly passed to newproc, which doesn't
3941 3941 * respect pool bindings.
3942 3942 *
3943 3943 * We hold the pool_lock across the call to newproc() to
3944 3944 * close the obvious race: the pool's scheduling class
3945 3945 * could change before we manage to create the LWP with
3946 3946 * classid 'cid'.
3947 3947 */
3948 3948 pool_lock();
3949 3949 if (zone->zone_defaultcid > 0)
3950 3950 cid = zone->zone_defaultcid;
3951 3951 else
3952 3952 cid = pool_get_class(zone->zone_pool);
3953 3953 if (cid == -1)
3954 3954 cid = defaultcid;
3955 3955
3956 3956 /*
3957 3957 * If this fails, zone_boot will ultimately fail. The
3958 3958 * state of the zone will be set to SHUTTING_DOWN-- userland
3959 3959 * will have to tear down the zone, and fail, or try again.
3960 3960 */
3961 3961 if ((zone->zone_boot_err = newproc(zone_start_init, NULL, cid,
3962 3962 minclsyspri - 1, &ct, 0)) != 0) {
3963 3963 mutex_enter(&zone_status_lock);
3964 3964 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN);
3965 3965 mutex_exit(&zone_status_lock);
3966 3966 } else {
3967 3967 zone->zone_boot_time = gethrestime_sec();
3968 3968 }
3969 3969
3970 3970 pool_unlock();
3971 3971 }
3972 3972
3973 3973 /*
3974 3974 * Wait for zone_destroy() to be called. This is what we spend
3975 3975 * most of our life doing.
3976 3976 */
3977 3977 zone_status_wait_cpr(zone, ZONE_IS_DYING, "zsched");
3978 3978
3979 3979 if (ct)
3980 3980 /*
3981 3981 * At this point the process contract should be empty.
3982 3982 * (Though if it isn't, it's not the end of the world.)
3983 3983 */
3984 3984 VERIFY(contract_abandon(ct, curproc, B_TRUE) == 0);
3985 3985
3986 3986 /*
3987 3987 * Allow kcred to be freed when all referring processes
3988 3988 * (including this one) go away. We can't just do this in
3989 3989 * zone_free because we need to wait for the zone_cred_ref to
3990 3990 * drop to 0 before calling zone_free, and the existence of
3991 3991 * zone_kcred will prevent that. Thus, we call crfree here to
3992 3992 * balance the crdup in zone_create. The crhold calls earlier
3993 3993 * in zsched will be dropped when the thread and process exit.
3994 3994 */
3995 3995 crfree(zone->zone_kcred);
3996 3996 zone->zone_kcred = NULL;
3997 3997
3998 3998 exit(CLD_EXITED, 0);
3999 3999 }
4000 4000
4001 4001 /*
4002 4002 * Helper function to determine if there are any submounts of the
4003 4003 * provided path. Used to make sure the zone doesn't "inherit" any
4004 4004 * mounts from before it is created.
4005 4005 */
4006 4006 static uint_t
4007 4007 zone_mount_count(const char *rootpath)
4008 4008 {
4009 4009 vfs_t *vfsp;
4010 4010 uint_t count = 0;
4011 4011 size_t rootpathlen = strlen(rootpath);
4012 4012
4013 4013 /*
4014 4014 * Holding zonehash_lock prevents race conditions with
4015 4015 * vfs_list_add()/vfs_list_remove() since we serialize with
4016 4016 * zone_find_by_path().
4017 4017 */
4018 4018 ASSERT(MUTEX_HELD(&zonehash_lock));
4019 4019 /*
4020 4020 * The rootpath must end with a '/'
4021 4021 */
4022 4022 ASSERT(rootpath[rootpathlen - 1] == '/');
4023 4023
4024 4024 /*
4025 4025 * This intentionally does not count the rootpath itself if that
4026 4026 * happens to be a mount point.
4027 4027 */
4028 4028 vfs_list_read_lock();
4029 4029 vfsp = rootvfs;
4030 4030 do {
4031 4031 if (strncmp(rootpath, refstr_value(vfsp->vfs_mntpt),
4032 4032 rootpathlen) == 0)
4033 4033 count++;
4034 4034 vfsp = vfsp->vfs_next;
4035 4035 } while (vfsp != rootvfs);
4036 4036 vfs_list_unlock();
4037 4037 return (count);
4038 4038 }
4039 4039
4040 4040 /*
4041 4041 * Helper function to make sure that a zone created on 'rootpath'
4042 4042 * wouldn't end up containing other zones' rootpaths.
4043 4043 */
4044 4044 static boolean_t
4045 4045 zone_is_nested(const char *rootpath)
4046 4046 {
4047 4047 zone_t *zone;
4048 4048 size_t rootpathlen = strlen(rootpath);
4049 4049 size_t len;
4050 4050
4051 4051 ASSERT(MUTEX_HELD(&zonehash_lock));
4052 4052
4053 4053 /*
4054 4054 * zone_set_root() appended '/' and '\0' at the end of rootpath
4055 4055 */
4056 4056 if ((rootpathlen <= 3) && (rootpath[0] == '/') &&
4057 4057 (rootpath[1] == '/') && (rootpath[2] == '\0'))
4058 4058 return (B_TRUE);
4059 4059
4060 4060 for (zone = list_head(&zone_active); zone != NULL;
4061 4061 zone = list_next(&zone_active, zone)) {
4062 4062 if (zone == global_zone)
4063 4063 continue;
4064 4064 len = strlen(zone->zone_rootpath);
4065 4065 if (strncmp(rootpath, zone->zone_rootpath,
4066 4066 MIN(rootpathlen, len)) == 0)
4067 4067 return (B_TRUE);
4068 4068 }
4069 4069 return (B_FALSE);
4070 4070 }
4071 4071
4072 4072 static int
4073 4073 zone_set_privset(zone_t *zone, const priv_set_t *zone_privs,
4074 4074 size_t zone_privssz)
4075 4075 {
4076 4076 priv_set_t *privs;
4077 4077
4078 4078 if (zone_privssz < sizeof (priv_set_t))
4079 4079 return (ENOMEM);
4080 4080
4081 4081 privs = kmem_alloc(sizeof (priv_set_t), KM_SLEEP);
4082 4082
4083 4083 if (copyin(zone_privs, privs, sizeof (priv_set_t))) {
4084 4084 kmem_free(privs, sizeof (priv_set_t));
4085 4085 return (EFAULT);
4086 4086 }
4087 4087
4088 4088 zone->zone_privset = privs;
4089 4089 return (0);
4090 4090 }
4091 4091
4092 4092 /*
4093 4093 * We make creative use of nvlists to pass in rctls from userland. The list is
4094 4094 * a list of the following structures:
4095 4095 *
4096 4096 * (name = rctl_name, value = nvpair_list_array)
4097 4097 *
4098 4098 * Where each element of the nvpair_list_array is of the form:
4099 4099 *
4100 4100 * [(name = "privilege", value = RCPRIV_PRIVILEGED),
4101 4101 * (name = "limit", value = uint64_t),
4102 4102 * (name = "action", value = (RCTL_LOCAL_NOACTION || RCTL_LOCAL_DENY))]
4103 4103 */
4104 4104 static int
4105 4105 parse_rctls(caddr_t ubuf, size_t buflen, nvlist_t **nvlp)
4106 4106 {
4107 4107 nvpair_t *nvp = NULL;
4108 4108 nvlist_t *nvl = NULL;
4109 4109 char *kbuf;
4110 4110 int error;
4111 4111 rctl_val_t rv;
4112 4112
4113 4113 *nvlp = NULL;
4114 4114
4115 4115 if (buflen == 0)
4116 4116 return (0);
4117 4117
4118 4118 if ((kbuf = kmem_alloc(buflen, KM_NOSLEEP)) == NULL)
4119 4119 return (ENOMEM);
4120 4120 if (copyin(ubuf, kbuf, buflen)) {
4121 4121 error = EFAULT;
4122 4122 goto out;
4123 4123 }
4124 4124 if (nvlist_unpack(kbuf, buflen, &nvl, KM_SLEEP) != 0) {
4125 4125 /*
4126 4126 * nvl may have been allocated/free'd, but the value set to
4127 4127 * non-NULL, so we reset it here.
4128 4128 */
4129 4129 nvl = NULL;
4130 4130 error = EINVAL;
4131 4131 goto out;
4132 4132 }
4133 4133 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4134 4134 rctl_dict_entry_t *rde;
4135 4135 rctl_hndl_t hndl;
4136 4136 nvlist_t **nvlarray;
4137 4137 uint_t i, nelem;
4138 4138 char *name;
4139 4139
4140 4140 error = EINVAL;
4141 4141 name = nvpair_name(nvp);
4142 4142 if (strncmp(nvpair_name(nvp), "zone.", sizeof ("zone.") - 1)
4143 4143 != 0 || nvpair_type(nvp) != DATA_TYPE_NVLIST_ARRAY) {
4144 4144 goto out;
4145 4145 }
4146 4146 if ((hndl = rctl_hndl_lookup(name)) == -1) {
4147 4147 goto out;
4148 4148 }
4149 4149 rde = rctl_dict_lookup_hndl(hndl);
4150 4150 error = nvpair_value_nvlist_array(nvp, &nvlarray, &nelem);
4151 4151 ASSERT(error == 0);
4152 4152 for (i = 0; i < nelem; i++) {
4153 4153 if (error = nvlist2rctlval(nvlarray[i], &rv))
4154 4154 goto out;
4155 4155 }
4156 4156 if (rctl_invalid_value(rde, &rv)) {
4157 4157 error = EINVAL;
4158 4158 goto out;
4159 4159 }
4160 4160 }
4161 4161 error = 0;
4162 4162 *nvlp = nvl;
4163 4163 out:
4164 4164 kmem_free(kbuf, buflen);
4165 4165 if (error && nvl != NULL)
4166 4166 nvlist_free(nvl);
4167 4167 return (error);
4168 4168 }
4169 4169
4170 4170 int
4171 4171 zone_create_error(int er_error, int er_ext, int *er_out) {
4172 4172 if (er_out != NULL) {
4173 4173 if (copyout(&er_ext, er_out, sizeof (int))) {
4174 4174 return (set_errno(EFAULT));
4175 4175 }
4176 4176 }
4177 4177 return (set_errno(er_error));
4178 4178 }
4179 4179
4180 4180 static int
4181 4181 zone_set_label(zone_t *zone, const bslabel_t *lab, uint32_t doi)
4182 4182 {
4183 4183 ts_label_t *tsl;
4184 4184 bslabel_t blab;
4185 4185
4186 4186 /* Get label from user */
4187 4187 if (copyin(lab, &blab, sizeof (blab)) != 0)
4188 4188 return (EFAULT);
4189 4189 tsl = labelalloc(&blab, doi, KM_NOSLEEP);
4190 4190 if (tsl == NULL)
4191 4191 return (ENOMEM);
4192 4192
4193 4193 zone->zone_slabel = tsl;
4194 4194 return (0);
4195 4195 }
4196 4196
4197 4197 /*
4198 4198 * Parses a comma-separated list of ZFS datasets into a per-zone dictionary.
4199 4199 */
4200 4200 static int
4201 4201 parse_zfs(zone_t *zone, caddr_t ubuf, size_t buflen)
4202 4202 {
4203 4203 char *kbuf;
4204 4204 char *dataset, *next;
4205 4205 zone_dataset_t *zd;
4206 4206 size_t len;
4207 4207
4208 4208 if (ubuf == NULL || buflen == 0)
4209 4209 return (0);
4210 4210
4211 4211 if ((kbuf = kmem_alloc(buflen, KM_NOSLEEP)) == NULL)
4212 4212 return (ENOMEM);
4213 4213
4214 4214 if (copyin(ubuf, kbuf, buflen) != 0) {
4215 4215 kmem_free(kbuf, buflen);
4216 4216 return (EFAULT);
4217 4217 }
4218 4218
4219 4219 dataset = next = kbuf;
4220 4220 for (;;) {
4221 4221 zd = kmem_alloc(sizeof (zone_dataset_t), KM_SLEEP);
4222 4222
4223 4223 next = strchr(dataset, ',');
4224 4224
4225 4225 if (next == NULL)
4226 4226 len = strlen(dataset);
4227 4227 else
4228 4228 len = next - dataset;
4229 4229
4230 4230 zd->zd_dataset = kmem_alloc(len + 1, KM_SLEEP);
4231 4231 bcopy(dataset, zd->zd_dataset, len);
4232 4232 zd->zd_dataset[len] = '\0';
4233 4233
4234 4234 list_insert_head(&zone->zone_datasets, zd);
4235 4235
4236 4236 if (next == NULL)
4237 4237 break;
4238 4238
4239 4239 dataset = next + 1;
4240 4240 }
4241 4241
4242 4242 kmem_free(kbuf, buflen);
4243 4243 return (0);
4244 4244 }
4245 4245
4246 4246 /*
4247 4247 * System call to create/initialize a new zone named 'zone_name', rooted
4248 4248 * at 'zone_root', with a zone-wide privilege limit set of 'zone_privs',
4249 4249 * and initialized with the zone-wide rctls described in 'rctlbuf', and
4250 4250 * with labeling set by 'match', 'doi', and 'label'.
4251 4251 *
4252 4252 * If extended error is non-null, we may use it to return more detailed
4253 4253 * error information.
4254 4254 */
4255 4255 static zoneid_t
4256 4256 zone_create(const char *zone_name, const char *zone_root,
4257 4257 const priv_set_t *zone_privs, size_t zone_privssz,
4258 4258 caddr_t rctlbuf, size_t rctlbufsz,
4259 4259 caddr_t zfsbuf, size_t zfsbufsz, int *extended_error,
4260 4260 int match, uint32_t doi, const bslabel_t *label,
4261 4261 int flags)
4262 4262 {
4263 4263 struct zsched_arg zarg;
4264 4264 nvlist_t *rctls = NULL;
4265 4265 proc_t *pp = curproc;
4266 4266 zone_t *zone, *ztmp;
4267 4267 zoneid_t zoneid;
4268 4268 int error;
4269 4269 int error2 = 0;
4270 4270 char *str;
4271 4271 cred_t *zkcr;
4272 4272 boolean_t insert_label_hash;
4273 4273
4274 4274 if (secpolicy_zone_config(CRED()) != 0)
4275 4275 return (set_errno(EPERM));
4276 4276
4277 4277 /* can't boot zone from within chroot environment */
4278 4278 if (PTOU(pp)->u_rdir != NULL && PTOU(pp)->u_rdir != rootdir)
4279 4279 return (zone_create_error(ENOTSUP, ZE_CHROOTED,
4280 4280 extended_error));
4281 4281
4282 4282 zone = kmem_zalloc(sizeof (zone_t), KM_SLEEP);
4283 4283 zoneid = zone->zone_id = id_alloc(zoneid_space);
4284 4284 zone->zone_status = ZONE_IS_UNINITIALIZED;
4285 4285 zone->zone_pool = pool_default;
4286 4286 zone->zone_pool_mod = gethrtime();
4287 4287 zone->zone_psetid = ZONE_PS_INVAL;
4288 4288 zone->zone_ncpus = 0;
4289 4289 zone->zone_ncpus_online = 0;
4290 4290 zone->zone_restart_init = B_TRUE;
4291 4291 zone->zone_brand = &native_brand;
4292 4292 zone->zone_initname = NULL;
4293 4293 mutex_init(&zone->zone_lock, NULL, MUTEX_DEFAULT, NULL);
4294 4294 mutex_init(&zone->zone_nlwps_lock, NULL, MUTEX_DEFAULT, NULL);
4295 4295 mutex_init(&zone->zone_mem_lock, NULL, MUTEX_DEFAULT, NULL);
4296 4296 cv_init(&zone->zone_cv, NULL, CV_DEFAULT, NULL);
4297 4297 list_create(&zone->zone_ref_list, sizeof (zone_ref_t),
4298 4298 offsetof(zone_ref_t, zref_linkage));
4299 4299 list_create(&zone->zone_zsd, sizeof (struct zsd_entry),
4300 4300 offsetof(struct zsd_entry, zsd_linkage));
4301 4301 list_create(&zone->zone_datasets, sizeof (zone_dataset_t),
4302 4302 offsetof(zone_dataset_t, zd_linkage));
4303 4303 list_create(&zone->zone_dl_list, sizeof (zone_dl_t),
4304 4304 offsetof(zone_dl_t, zdl_linkage));
4305 4305 rw_init(&zone->zone_mlps.mlpl_rwlock, NULL, RW_DEFAULT, NULL);
4306 4306 rw_init(&zone->zone_mntfs_db_lock, NULL, RW_DEFAULT, NULL);
4307 4307
4308 4308 if (flags & ZCF_NET_EXCL) {
4309 4309 zone->zone_flags |= ZF_NET_EXCL;
4310 4310 }
4311 4311
4312 4312 if ((error = zone_set_name(zone, zone_name)) != 0) {
4313 4313 zone_free(zone);
4314 4314 return (zone_create_error(error, 0, extended_error));
4315 4315 }
4316 4316
4317 4317 if ((error = zone_set_root(zone, zone_root)) != 0) {
4318 4318 zone_free(zone);
4319 4319 return (zone_create_error(error, 0, extended_error));
4320 4320 }
4321 4321 if ((error = zone_set_privset(zone, zone_privs, zone_privssz)) != 0) {
4322 4322 zone_free(zone);
4323 4323 return (zone_create_error(error, 0, extended_error));
4324 4324 }
4325 4325
4326 4326 /* initialize node name to be the same as zone name */
4327 4327 zone->zone_nodename = kmem_alloc(_SYS_NMLN, KM_SLEEP);
4328 4328 (void) strncpy(zone->zone_nodename, zone->zone_name, _SYS_NMLN);
4329 4329 zone->zone_nodename[_SYS_NMLN - 1] = '\0';
4330 4330
4331 4331 zone->zone_domain = kmem_alloc(_SYS_NMLN, KM_SLEEP);
4332 4332 zone->zone_domain[0] = '\0';
4333 4333 zone->zone_hostid = HW_INVALID_HOSTID;
4334 4334 zone->zone_shares = 1;
4335 4335 zone->zone_shmmax = 0;
4336 4336 zone->zone_ipc.ipcq_shmmni = 0;
4337 4337 zone->zone_ipc.ipcq_semmni = 0;
4338 4338 zone->zone_ipc.ipcq_msgmni = 0;
4339 4339 zone->zone_bootargs = NULL;
4340 4340 zone->zone_fs_allowed = NULL;
4341 4341 zone->zone_initname =
4342 4342 kmem_alloc(strlen(zone_default_initname) + 1, KM_SLEEP);
4343 4343 (void) strcpy(zone->zone_initname, zone_default_initname);
4344 4344 zone->zone_nlwps = 0;
4345 4345 zone->zone_nlwps_ctl = INT_MAX;
4346 4346 zone->zone_nprocs = 0;
4347 4347 zone->zone_nprocs_ctl = INT_MAX;
4348 4348 zone->zone_locked_mem = 0;
4349 4349 zone->zone_locked_mem_ctl = UINT64_MAX;
4350 4350 zone->zone_max_swap = 0;
4351 4351 zone->zone_max_swap_ctl = UINT64_MAX;
4352 4352 zone->zone_max_lofi = 0;
4353 4353 zone->zone_max_lofi_ctl = UINT64_MAX;
4354 4354 zone0.zone_lockedmem_kstat = NULL;
4355 4355 zone0.zone_swapresv_kstat = NULL;
4356 4356
4357 4357 /*
4358 4358 * Zsched initializes the rctls.
4359 4359 */
4360 4360 zone->zone_rctls = NULL;
4361 4361
4362 4362 if ((error = parse_rctls(rctlbuf, rctlbufsz, &rctls)) != 0) {
4363 4363 zone_free(zone);
4364 4364 return (zone_create_error(error, 0, extended_error));
4365 4365 }
4366 4366
4367 4367 if ((error = parse_zfs(zone, zfsbuf, zfsbufsz)) != 0) {
4368 4368 zone_free(zone);
4369 4369 return (set_errno(error));
4370 4370 }
4371 4371
4372 4372 /*
4373 4373 * Read in the trusted system parameters:
4374 4374 * match flag and sensitivity label.
4375 4375 */
4376 4376 zone->zone_match = match;
4377 4377 if (is_system_labeled() && !(zone->zone_flags & ZF_IS_SCRATCH)) {
4378 4378 /* Fail if requested to set doi to anything but system's doi */
4379 4379 if (doi != 0 && doi != default_doi) {
4380 4380 zone_free(zone);
4381 4381 return (set_errno(EINVAL));
4382 4382 }
4383 4383 /* Always apply system's doi to the zone */
4384 4384 error = zone_set_label(zone, label, default_doi);
4385 4385 if (error != 0) {
4386 4386 zone_free(zone);
4387 4387 return (set_errno(error));
4388 4388 }
4389 4389 insert_label_hash = B_TRUE;
4390 4390 } else {
4391 4391 /* all zones get an admin_low label if system is not labeled */
4392 4392 zone->zone_slabel = l_admin_low;
4393 4393 label_hold(l_admin_low);
4394 4394 insert_label_hash = B_FALSE;
4395 4395 }
4396 4396
4397 4397 /*
4398 4398 * Stop all lwps since that's what normally happens as part of fork().
4399 4399 * This needs to happen before we grab any locks to avoid deadlock
4400 4400 * (another lwp in the process could be waiting for the held lock).
4401 4401 */
4402 4402 if (curthread != pp->p_agenttp && !holdlwps(SHOLDFORK)) {
4403 4403 zone_free(zone);
4404 4404 if (rctls)
4405 4405 nvlist_free(rctls);
4406 4406 return (zone_create_error(error, 0, extended_error));
4407 4407 }
4408 4408
4409 4409 if (block_mounts(zone) == 0) {
4410 4410 mutex_enter(&pp->p_lock);
4411 4411 if (curthread != pp->p_agenttp)
4412 4412 continuelwps(pp);
4413 4413 mutex_exit(&pp->p_lock);
4414 4414 zone_free(zone);
4415 4415 if (rctls)
4416 4416 nvlist_free(rctls);
4417 4417 return (zone_create_error(error, 0, extended_error));
4418 4418 }
4419 4419
4420 4420 /*
4421 4421 * Set up credential for kernel access. After this, any errors
4422 4422 * should go through the dance in errout rather than calling
4423 4423 * zone_free directly.
4424 4424 */
4425 4425 zone->zone_kcred = crdup(kcred);
4426 4426 crsetzone(zone->zone_kcred, zone);
4427 4427 priv_intersect(zone->zone_privset, &CR_PPRIV(zone->zone_kcred));
4428 4428 priv_intersect(zone->zone_privset, &CR_EPRIV(zone->zone_kcred));
4429 4429 priv_intersect(zone->zone_privset, &CR_IPRIV(zone->zone_kcred));
4430 4430 priv_intersect(zone->zone_privset, &CR_LPRIV(zone->zone_kcred));
4431 4431
4432 4432 mutex_enter(&zonehash_lock);
4433 4433 /*
4434 4434 * Make sure zone doesn't already exist.
4435 4435 *
4436 4436 * If the system and zone are labeled,
4437 4437 * make sure no other zone exists that has the same label.
4438 4438 */
4439 4439 if ((ztmp = zone_find_all_by_name(zone->zone_name)) != NULL ||
4440 4440 (insert_label_hash &&
4441 4441 (ztmp = zone_find_all_by_label(zone->zone_slabel)) != NULL)) {
4442 4442 zone_status_t status;
4443 4443
4444 4444 status = zone_status_get(ztmp);
4445 4445 if (status == ZONE_IS_READY || status == ZONE_IS_RUNNING)
4446 4446 error = EEXIST;
4447 4447 else
4448 4448 error = EBUSY;
4449 4449
4450 4450 if (insert_label_hash)
4451 4451 error2 = ZE_LABELINUSE;
4452 4452
4453 4453 goto errout;
4454 4454 }
4455 4455
4456 4456 /*
4457 4457 * Don't allow zone creations which would cause one zone's rootpath to
4458 4458 * be accessible from that of another (non-global) zone.
4459 4459 */
4460 4460 if (zone_is_nested(zone->zone_rootpath)) {
4461 4461 error = EBUSY;
4462 4462 goto errout;
4463 4463 }
4464 4464
4465 4465 ASSERT(zonecount != 0); /* check for leaks */
4466 4466 if (zonecount + 1 > maxzones) {
4467 4467 error = ENOMEM;
4468 4468 goto errout;
4469 4469 }
4470 4470
4471 4471 if (zone_mount_count(zone->zone_rootpath) != 0) {
4472 4472 error = EBUSY;
4473 4473 error2 = ZE_AREMOUNTS;
4474 4474 goto errout;
4475 4475 }
4476 4476
4477 4477 /*
4478 4478 * Zone is still incomplete, but we need to drop all locks while
4479 4479 * zsched() initializes this zone's kernel process. We
4480 4480 * optimistically add the zone to the hashtable and associated
4481 4481 * lists so a parallel zone_create() doesn't try to create the
4482 4482 * same zone.
4483 4483 */
4484 4484 zonecount++;
4485 4485 (void) mod_hash_insert(zonehashbyid,
4486 4486 (mod_hash_key_t)(uintptr_t)zone->zone_id,
4487 4487 (mod_hash_val_t)(uintptr_t)zone);
4488 4488 str = kmem_alloc(strlen(zone->zone_name) + 1, KM_SLEEP);
4489 4489 (void) strcpy(str, zone->zone_name);
4490 4490 (void) mod_hash_insert(zonehashbyname, (mod_hash_key_t)str,
4491 4491 (mod_hash_val_t)(uintptr_t)zone);
4492 4492 if (insert_label_hash) {
4493 4493 (void) mod_hash_insert(zonehashbylabel,
4494 4494 (mod_hash_key_t)zone->zone_slabel, (mod_hash_val_t)zone);
4495 4495 zone->zone_flags |= ZF_HASHED_LABEL;
4496 4496 }
4497 4497
4498 4498 /*
4499 4499 * Insert into active list. At this point there are no 'hold's
4500 4500 * on the zone, but everyone else knows not to use it, so we can
4501 4501 * continue to use it. zsched() will do a zone_hold() if the
4502 4502 * newproc() is successful.
4503 4503 */
4504 4504 list_insert_tail(&zone_active, zone);
4505 4505 mutex_exit(&zonehash_lock);
4506 4506
4507 4507 zarg.zone = zone;
4508 4508 zarg.nvlist = rctls;
4509 4509 /*
4510 4510 * The process, task, and project rctls are probably wrong;
4511 4511 * we need an interface to get the default values of all rctls,
4512 4512 * and initialize zsched appropriately. I'm not sure that that
4513 4513 * makes much of a difference, though.
4514 4514 */
4515 4515 error = newproc(zsched, (void *)&zarg, syscid, minclsyspri, NULL, 0);
4516 4516 if (error != 0) {
4517 4517 /*
4518 4518 * We need to undo all globally visible state.
4519 4519 */
4520 4520 mutex_enter(&zonehash_lock);
4521 4521 list_remove(&zone_active, zone);
4522 4522 if (zone->zone_flags & ZF_HASHED_LABEL) {
4523 4523 ASSERT(zone->zone_slabel != NULL);
4524 4524 (void) mod_hash_destroy(zonehashbylabel,
4525 4525 (mod_hash_key_t)zone->zone_slabel);
4526 4526 }
4527 4527 (void) mod_hash_destroy(zonehashbyname,
4528 4528 (mod_hash_key_t)(uintptr_t)zone->zone_name);
4529 4529 (void) mod_hash_destroy(zonehashbyid,
4530 4530 (mod_hash_key_t)(uintptr_t)zone->zone_id);
4531 4531 ASSERT(zonecount > 1);
4532 4532 zonecount--;
4533 4533 goto errout;
4534 4534 }
4535 4535
4536 4536 /*
4537 4537 * Zone creation can't fail from now on.
4538 4538 */
4539 4539
4540 4540 /*
4541 4541 * Create zone kstats
4542 4542 */
4543 4543 zone_kstat_create(zone);
4544 4544
4545 4545 /*
4546 4546 * Let the other lwps continue.
4547 4547 */
4548 4548 mutex_enter(&pp->p_lock);
4549 4549 if (curthread != pp->p_agenttp)
4550 4550 continuelwps(pp);
4551 4551 mutex_exit(&pp->p_lock);
4552 4552
4553 4553 /*
4554 4554 * Wait for zsched to finish initializing the zone.
4555 4555 */
4556 4556 zone_status_wait(zone, ZONE_IS_READY);
4557 4557 /*
4558 4558 * The zone is fully visible, so we can let mounts progress.
4559 4559 */
4560 4560 resume_mounts(zone);
4561 4561 if (rctls)
4562 4562 nvlist_free(rctls);
4563 4563
4564 4564 return (zoneid);
4565 4565
4566 4566 errout:
4567 4567 mutex_exit(&zonehash_lock);
4568 4568 /*
4569 4569 * Let the other lwps continue.
4570 4570 */
4571 4571 mutex_enter(&pp->p_lock);
4572 4572 if (curthread != pp->p_agenttp)
4573 4573 continuelwps(pp);
4574 4574 mutex_exit(&pp->p_lock);
4575 4575
4576 4576 resume_mounts(zone);
4577 4577 if (rctls)
4578 4578 nvlist_free(rctls);
4579 4579 /*
4580 4580 * There is currently one reference to the zone, a cred_ref from
4581 4581 * zone_kcred. To free the zone, we call crfree, which will call
4582 4582 * zone_cred_rele, which will call zone_free.
4583 4583 */
4584 4584 ASSERT(zone->zone_cred_ref == 1);
4585 4585 ASSERT(zone->zone_kcred->cr_ref == 1);
4586 4586 ASSERT(zone->zone_ref == 0);
4587 4587 zkcr = zone->zone_kcred;
4588 4588 zone->zone_kcred = NULL;
4589 4589 crfree(zkcr); /* triggers call to zone_free */
4590 4590 return (zone_create_error(error, error2, extended_error));
4591 4591 }
4592 4592
4593 4593 /*
4594 4594 * Cause the zone to boot. This is pretty simple, since we let zoneadmd do
4595 4595 * the heavy lifting. initname is the path to the program to launch
4596 4596 * at the "top" of the zone; if this is NULL, we use the system default,
4597 4597 * which is stored at zone_default_initname.
4598 4598 */
4599 4599 static int
4600 4600 zone_boot(zoneid_t zoneid)
4601 4601 {
4602 4602 int err;
4603 4603 zone_t *zone;
4604 4604
4605 4605 if (secpolicy_zone_config(CRED()) != 0)
4606 4606 return (set_errno(EPERM));
4607 4607 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID)
4608 4608 return (set_errno(EINVAL));
4609 4609
4610 4610 mutex_enter(&zonehash_lock);
4611 4611 /*
4612 4612 * Look for zone under hash lock to prevent races with calls to
4613 4613 * zone_shutdown, zone_destroy, etc.
4614 4614 */
4615 4615 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
4616 4616 mutex_exit(&zonehash_lock);
4617 4617 return (set_errno(EINVAL));
4618 4618 }
4619 4619
4620 4620 mutex_enter(&zone_status_lock);
4621 4621 if (zone_status_get(zone) != ZONE_IS_READY) {
4622 4622 mutex_exit(&zone_status_lock);
4623 4623 mutex_exit(&zonehash_lock);
4624 4624 return (set_errno(EINVAL));
4625 4625 }
4626 4626 zone_status_set(zone, ZONE_IS_BOOTING);
4627 4627 mutex_exit(&zone_status_lock);
4628 4628
4629 4629 zone_hold(zone); /* so we can use the zone_t later */
4630 4630 mutex_exit(&zonehash_lock);
4631 4631
4632 4632 if (zone_status_wait_sig(zone, ZONE_IS_RUNNING) == 0) {
4633 4633 zone_rele(zone);
4634 4634 return (set_errno(EINTR));
4635 4635 }
4636 4636
4637 4637 /*
4638 4638 * Boot (starting init) might have failed, in which case the zone
4639 4639 * will go to the SHUTTING_DOWN state; an appropriate errno will
4640 4640 * be placed in zone->zone_boot_err, and so we return that.
4641 4641 */
4642 4642 err = zone->zone_boot_err;
4643 4643 zone_rele(zone);
4644 4644 return (err ? set_errno(err) : 0);
4645 4645 }
4646 4646
4647 4647 /*
4648 4648 * Kills all user processes in the zone, waiting for them all to exit
4649 4649 * before returning.
4650 4650 */
4651 4651 static int
4652 4652 zone_empty(zone_t *zone)
4653 4653 {
4654 4654 int waitstatus;
4655 4655
4656 4656 /*
4657 4657 * We need to drop zonehash_lock before killing all
4658 4658 * processes, otherwise we'll deadlock with zone_find_*
4659 4659 * which can be called from the exit path.
4660 4660 */
4661 4661 ASSERT(MUTEX_NOT_HELD(&zonehash_lock));
4662 4662 while ((waitstatus = zone_status_timedwait_sig(zone,
4663 4663 ddi_get_lbolt() + hz, ZONE_IS_EMPTY)) == -1) {
4664 4664 killall(zone->zone_id);
4665 4665 }
4666 4666 /*
4667 4667 * return EINTR if we were signaled
4668 4668 */
4669 4669 if (waitstatus == 0)
4670 4670 return (EINTR);
4671 4671 return (0);
4672 4672 }
4673 4673
4674 4674 /*
4675 4675 * This function implements the policy for zone visibility.
4676 4676 *
4677 4677 * In standard Solaris, a non-global zone can only see itself.
4678 4678 *
4679 4679 * In Trusted Extensions, a labeled zone can lookup any zone whose label
4680 4680 * it dominates. For this test, the label of the global zone is treated as
4681 4681 * admin_high so it is special-cased instead of being checked for dominance.
4682 4682 *
4683 4683 * Returns true if zone attributes are viewable, false otherwise.
4684 4684 */
4685 4685 static boolean_t
4686 4686 zone_list_access(zone_t *zone)
4687 4687 {
4688 4688
4689 4689 if (curproc->p_zone == global_zone ||
4690 4690 curproc->p_zone == zone) {
4691 4691 return (B_TRUE);
4692 4692 } else if (is_system_labeled() && !(zone->zone_flags & ZF_IS_SCRATCH)) {
4693 4693 bslabel_t *curproc_label;
4694 4694 bslabel_t *zone_label;
4695 4695
4696 4696 curproc_label = label2bslabel(curproc->p_zone->zone_slabel);
4697 4697 zone_label = label2bslabel(zone->zone_slabel);
4698 4698
4699 4699 if (zone->zone_id != GLOBAL_ZONEID &&
4700 4700 bldominates(curproc_label, zone_label)) {
4701 4701 return (B_TRUE);
4702 4702 } else {
4703 4703 return (B_FALSE);
4704 4704 }
4705 4705 } else {
4706 4706 return (B_FALSE);
4707 4707 }
4708 4708 }
4709 4709
4710 4710 /*
4711 4711 * Systemcall to start the zone's halt sequence. By the time this
4712 4712 * function successfully returns, all user processes and kernel threads
4713 4713 * executing in it will have exited, ZSD shutdown callbacks executed,
4714 4714 * and the zone status set to ZONE_IS_DOWN.
4715 4715 *
4716 4716 * It is possible that the call will interrupt itself if the caller is the
4717 4717 * parent of any process running in the zone, and doesn't have SIGCHLD blocked.
4718 4718 */
4719 4719 static int
4720 4720 zone_shutdown(zoneid_t zoneid)
4721 4721 {
4722 4722 int error;
4723 4723 zone_t *zone;
4724 4724 zone_status_t status;
4725 4725
4726 4726 if (secpolicy_zone_config(CRED()) != 0)
4727 4727 return (set_errno(EPERM));
4728 4728 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID)
4729 4729 return (set_errno(EINVAL));
4730 4730
4731 4731 mutex_enter(&zonehash_lock);
4732 4732 /*
4733 4733 * Look for zone under hash lock to prevent races with other
4734 4734 * calls to zone_shutdown and zone_destroy.
4735 4735 */
4736 4736 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
4737 4737 mutex_exit(&zonehash_lock);
4738 4738 return (set_errno(EINVAL));
4739 4739 }
4740 4740
4741 4741 /*
4742 4742 * We have to drop zonehash_lock before calling block_mounts.
4743 4743 * Hold the zone so we can continue to use the zone_t.
4744 4744 */
4745 4745 zone_hold(zone);
4746 4746 mutex_exit(&zonehash_lock);
4747 4747
4748 4748 /*
4749 4749 * Block mounts so that VFS_MOUNT() can get an accurate view of
4750 4750 * the zone's status with regards to ZONE_IS_SHUTTING down.
4751 4751 *
4752 4752 * e.g. NFS can fail the mount if it determines that the zone
4753 4753 * has already begun the shutdown sequence.
4754 4754 *
4755 4755 */
4756 4756 if (block_mounts(zone) == 0) {
4757 4757 zone_rele(zone);
4758 4758 return (set_errno(EINTR));
4759 4759 }
4760 4760
4761 4761 mutex_enter(&zonehash_lock);
4762 4762 mutex_enter(&zone_status_lock);
4763 4763 status = zone_status_get(zone);
4764 4764 /*
4765 4765 * Fail if the zone isn't fully initialized yet.
4766 4766 */
4767 4767 if (status < ZONE_IS_READY) {
4768 4768 mutex_exit(&zone_status_lock);
4769 4769 mutex_exit(&zonehash_lock);
4770 4770 resume_mounts(zone);
4771 4771 zone_rele(zone);
4772 4772 return (set_errno(EINVAL));
4773 4773 }
4774 4774 /*
4775 4775 * If conditions required for zone_shutdown() to return have been met,
4776 4776 * return success.
4777 4777 */
4778 4778 if (status >= ZONE_IS_DOWN) {
4779 4779 mutex_exit(&zone_status_lock);
4780 4780 mutex_exit(&zonehash_lock);
4781 4781 resume_mounts(zone);
4782 4782 zone_rele(zone);
4783 4783 return (0);
4784 4784 }
4785 4785 /*
4786 4786 * If zone_shutdown() hasn't been called before, go through the motions.
4787 4787 * If it has, there's nothing to do but wait for the kernel threads to
4788 4788 * drain.
4789 4789 */
4790 4790 if (status < ZONE_IS_EMPTY) {
4791 4791 uint_t ntasks;
4792 4792
4793 4793 mutex_enter(&zone->zone_lock);
4794 4794 if ((ntasks = zone->zone_ntasks) != 1) {
4795 4795 /*
4796 4796 * There's still stuff running.
4797 4797 */
4798 4798 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN);
4799 4799 }
4800 4800 mutex_exit(&zone->zone_lock);
4801 4801 if (ntasks == 1) {
4802 4802 /*
4803 4803 * The only way to create another task is through
4804 4804 * zone_enter(), which will block until we drop
4805 4805 * zonehash_lock. The zone is empty.
4806 4806 */
4807 4807 if (zone->zone_kthreads == NULL) {
4808 4808 /*
4809 4809 * Skip ahead to ZONE_IS_DOWN
4810 4810 */
4811 4811 zone_status_set(zone, ZONE_IS_DOWN);
4812 4812 } else {
4813 4813 zone_status_set(zone, ZONE_IS_EMPTY);
4814 4814 }
4815 4815 }
4816 4816 }
4817 4817 mutex_exit(&zone_status_lock);
4818 4818 mutex_exit(&zonehash_lock);
4819 4819 resume_mounts(zone);
4820 4820
4821 4821 if (error = zone_empty(zone)) {
4822 4822 zone_rele(zone);
4823 4823 return (set_errno(error));
4824 4824 }
4825 4825 /*
4826 4826 * After the zone status goes to ZONE_IS_DOWN this zone will no
4827 4827 * longer be notified of changes to the pools configuration, so
4828 4828 * in order to not end up with a stale pool pointer, we point
4829 4829 * ourselves at the default pool and remove all resource
4830 4830 * visibility. This is especially important as the zone_t may
4831 4831 * languish on the deathrow for a very long time waiting for
4832 4832 * cred's to drain out.
4833 4833 *
4834 4834 * This rebinding of the zone can happen multiple times
4835 4835 * (presumably due to interrupted or parallel systemcalls)
4836 4836 * without any adverse effects.
4837 4837 */
4838 4838 if (pool_lock_intr() != 0) {
4839 4839 zone_rele(zone);
4840 4840 return (set_errno(EINTR));
4841 4841 }
4842 4842 if (pool_state == POOL_ENABLED) {
4843 4843 mutex_enter(&cpu_lock);
4844 4844 zone_pool_set(zone, pool_default);
4845 4845 /*
4846 4846 * The zone no longer needs to be able to see any cpus.
4847 4847 */
4848 4848 zone_pset_set(zone, ZONE_PS_INVAL);
4849 4849 mutex_exit(&cpu_lock);
4850 4850 }
4851 4851 pool_unlock();
4852 4852
4853 4853 /*
4854 4854 * ZSD shutdown callbacks can be executed multiple times, hence
4855 4855 * it is safe to not be holding any locks across this call.
4856 4856 */
4857 4857 zone_zsd_callbacks(zone, ZSD_SHUTDOWN);
4858 4858
4859 4859 mutex_enter(&zone_status_lock);
4860 4860 if (zone->zone_kthreads == NULL && zone_status_get(zone) < ZONE_IS_DOWN)
4861 4861 zone_status_set(zone, ZONE_IS_DOWN);
4862 4862 mutex_exit(&zone_status_lock);
4863 4863
4864 4864 /*
4865 4865 * Wait for kernel threads to drain.
4866 4866 */
4867 4867 if (!zone_status_wait_sig(zone, ZONE_IS_DOWN)) {
4868 4868 zone_rele(zone);
4869 4869 return (set_errno(EINTR));
4870 4870 }
4871 4871
4872 4872 /*
4873 4873 * Zone can be become down/destroyable even if the above wait
4874 4874 * returns EINTR, so any code added here may never execute.
4875 4875 * (i.e. don't add code here)
4876 4876 */
4877 4877
4878 4878 zone_rele(zone);
4879 4879 return (0);
4880 4880 }
4881 4881
4882 4882 /*
4883 4883 * Log the specified zone's reference counts. The caller should not be
4884 4884 * holding the zone's zone_lock.
4885 4885 */
4886 4886 static void
4887 4887 zone_log_refcounts(zone_t *zone)
4888 4888 {
4889 4889 char *buffer;
4890 4890 char *buffer_position;
4891 4891 uint32_t buffer_size;
4892 4892 uint32_t index;
4893 4893 uint_t ref;
4894 4894 uint_t cred_ref;
4895 4895
4896 4896 /*
4897 4897 * Construct a string representing the subsystem-specific reference
4898 4898 * counts. The counts are printed in ascending order by index into the
4899 4899 * zone_t::zone_subsys_ref array. The list will be surrounded by
4900 4900 * square brackets [] and will only contain nonzero reference counts.
4901 4901 *
4902 4902 * The buffer will hold two square bracket characters plus ten digits,
4903 4903 * one colon, one space, one comma, and some characters for a
4904 4904 * subsystem name per subsystem-specific reference count. (Unsigned 32-
4905 4905 * bit integers have at most ten decimal digits.) The last
4906 4906 * reference count's comma is replaced by the closing square
4907 4907 * bracket and a NULL character to terminate the string.
4908 4908 *
4909 4909 * NOTE: We have to grab the zone's zone_lock to create a consistent
4910 4910 * snapshot of the zone's reference counters.
4911 4911 *
4912 4912 * First, figure out how much space the string buffer will need.
4913 4913 * The buffer's size is stored in buffer_size.
4914 4914 */
4915 4915 buffer_size = 2; /* for the square brackets */
4916 4916 mutex_enter(&zone->zone_lock);
4917 4917 zone->zone_flags |= ZF_REFCOUNTS_LOGGED;
4918 4918 ref = zone->zone_ref;
4919 4919 cred_ref = zone->zone_cred_ref;
4920 4920 for (index = 0; index < ZONE_REF_NUM_SUBSYS; ++index)
4921 4921 if (zone->zone_subsys_ref[index] != 0)
4922 4922 buffer_size += strlen(zone_ref_subsys_names[index]) +
4923 4923 13;
4924 4924 if (buffer_size == 2) {
4925 4925 /*
4926 4926 * No subsystems had nonzero reference counts. Don't bother
4927 4927 * with allocating a buffer; just log the general-purpose and
4928 4928 * credential reference counts.
4929 4929 */
4930 4930 mutex_exit(&zone->zone_lock);
4931 4931 (void) strlog(0, 0, 1, SL_CONSOLE | SL_NOTE,
4932 4932 "Zone '%s' (ID: %d) is shutting down, but %u zone "
4933 4933 "references and %u credential references are still extant",
4934 4934 zone->zone_name, zone->zone_id, ref, cred_ref);
4935 4935 return;
4936 4936 }
4937 4937
4938 4938 /*
4939 4939 * buffer_size contains the exact number of characters that the
4940 4940 * buffer will need. Allocate the buffer and fill it with nonzero
4941 4941 * subsystem-specific reference counts. Surround the results with
4942 4942 * square brackets afterwards.
4943 4943 */
4944 4944 buffer = kmem_alloc(buffer_size, KM_SLEEP);
4945 4945 buffer_position = &buffer[1];
4946 4946 for (index = 0; index < ZONE_REF_NUM_SUBSYS; ++index) {
4947 4947 /*
4948 4948 * NOTE: The DDI's version of sprintf() returns a pointer to
4949 4949 * the modified buffer rather than the number of bytes written
4950 4950 * (as in snprintf(3C)). This is unfortunate and annoying.
4951 4951 * Therefore, we'll use snprintf() with INT_MAX to get the
4952 4952 * number of bytes written. Using INT_MAX is safe because
4953 4953 * the buffer is perfectly sized for the data: we'll never
4954 4954 * overrun the buffer.
4955 4955 */
4956 4956 if (zone->zone_subsys_ref[index] != 0)
4957 4957 buffer_position += snprintf(buffer_position, INT_MAX,
4958 4958 "%s: %u,", zone_ref_subsys_names[index],
4959 4959 zone->zone_subsys_ref[index]);
4960 4960 }
4961 4961 mutex_exit(&zone->zone_lock);
4962 4962 buffer[0] = '[';
4963 4963 ASSERT((uintptr_t)(buffer_position - buffer) < buffer_size);
4964 4964 ASSERT(buffer_position[0] == '\0' && buffer_position[-1] == ',');
4965 4965 buffer_position[-1] = ']';
4966 4966
4967 4967 /*
4968 4968 * Log the reference counts and free the message buffer.
4969 4969 */
4970 4970 (void) strlog(0, 0, 1, SL_CONSOLE | SL_NOTE,
4971 4971 "Zone '%s' (ID: %d) is shutting down, but %u zone references and "
4972 4972 "%u credential references are still extant %s", zone->zone_name,
4973 4973 zone->zone_id, ref, cred_ref, buffer);
4974 4974 kmem_free(buffer, buffer_size);
4975 4975 }
4976 4976
4977 4977 /*
4978 4978 * Systemcall entry point to finalize the zone halt process. The caller
4979 4979 * must have already successfully called zone_shutdown().
4980 4980 *
4981 4981 * Upon successful completion, the zone will have been fully destroyed:
4982 4982 * zsched will have exited, destructor callbacks executed, and the zone
4983 4983 * removed from the list of active zones.
4984 4984 */
4985 4985 static int
4986 4986 zone_destroy(zoneid_t zoneid)
4987 4987 {
4988 4988 uint64_t uniqid;
4989 4989 zone_t *zone;
4990 4990 zone_status_t status;
4991 4991 clock_t wait_time;
4992 4992 boolean_t log_refcounts;
4993 4993
4994 4994 if (secpolicy_zone_config(CRED()) != 0)
4995 4995 return (set_errno(EPERM));
4996 4996 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID)
4997 4997 return (set_errno(EINVAL));
4998 4998
4999 4999 mutex_enter(&zonehash_lock);
5000 5000 /*
5001 5001 * Look for zone under hash lock to prevent races with other
5002 5002 * calls to zone_destroy.
5003 5003 */
5004 5004 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
5005 5005 mutex_exit(&zonehash_lock);
5006 5006 return (set_errno(EINVAL));
5007 5007 }
5008 5008
5009 5009 if (zone_mount_count(zone->zone_rootpath) != 0) {
5010 5010 mutex_exit(&zonehash_lock);
5011 5011 return (set_errno(EBUSY));
5012 5012 }
5013 5013 mutex_enter(&zone_status_lock);
5014 5014 status = zone_status_get(zone);
5015 5015 if (status < ZONE_IS_DOWN) {
5016 5016 mutex_exit(&zone_status_lock);
5017 5017 mutex_exit(&zonehash_lock);
5018 5018 return (set_errno(EBUSY));
5019 5019 } else if (status == ZONE_IS_DOWN) {
5020 5020 zone_status_set(zone, ZONE_IS_DYING); /* Tell zsched to exit */
5021 5021 }
5022 5022 mutex_exit(&zone_status_lock);
5023 5023 zone_hold(zone);
5024 5024 mutex_exit(&zonehash_lock);
5025 5025
5026 5026 /*
5027 5027 * wait for zsched to exit
5028 5028 */
5029 5029 zone_status_wait(zone, ZONE_IS_DEAD);
5030 5030 zone_zsd_callbacks(zone, ZSD_DESTROY);
5031 5031 zone->zone_netstack = NULL;
5032 5032 uniqid = zone->zone_uniqid;
5033 5033 zone_rele(zone);
5034 5034 zone = NULL; /* potentially free'd */
5035 5035
5036 5036 log_refcounts = B_FALSE;
5037 5037 wait_time = SEC_TO_TICK(ZONE_DESTROY_TIMEOUT_SECS);
5038 5038 mutex_enter(&zonehash_lock);
5039 5039 for (; /* ever */; ) {
5040 5040 boolean_t unref;
5041 5041 boolean_t refs_have_been_logged;
5042 5042
5043 5043 if ((zone = zone_find_all_by_id(zoneid)) == NULL ||
5044 5044 zone->zone_uniqid != uniqid) {
5045 5045 /*
5046 5046 * The zone has gone away. Necessary conditions
5047 5047 * are met, so we return success.
5048 5048 */
5049 5049 mutex_exit(&zonehash_lock);
5050 5050 return (0);
5051 5051 }
5052 5052 mutex_enter(&zone->zone_lock);
5053 5053 unref = ZONE_IS_UNREF(zone);
5054 5054 refs_have_been_logged = (zone->zone_flags &
5055 5055 ZF_REFCOUNTS_LOGGED);
5056 5056 mutex_exit(&zone->zone_lock);
5057 5057 if (unref) {
5058 5058 /*
5059 5059 * There is only one reference to the zone -- that
5060 5060 * added when the zone was added to the hashtables --
5061 5061 * and things will remain this way until we drop
5062 5062 * zonehash_lock... we can go ahead and cleanup the
5063 5063 * zone.
5064 5064 */
5065 5065 break;
5066 5066 }
5067 5067
5068 5068 /*
5069 5069 * Wait for zone_rele_common() or zone_cred_rele() to signal
5070 5070 * zone_destroy_cv. zone_destroy_cv is signaled only when
5071 5071 * some zone's general-purpose reference count reaches one.
5072 5072 * If ZONE_DESTROY_TIMEOUT_SECS seconds elapse while waiting
5073 5073 * on zone_destroy_cv, then log the zone's reference counts and
5074 5074 * continue to wait for zone_rele() and zone_cred_rele().
5075 5075 */
5076 5076 if (!refs_have_been_logged) {
5077 5077 if (!log_refcounts) {
5078 5078 /*
5079 5079 * This thread hasn't timed out waiting on
5080 5080 * zone_destroy_cv yet. Wait wait_time clock
5081 5081 * ticks (initially ZONE_DESTROY_TIMEOUT_SECS
5082 5082 * seconds) for the zone's references to clear.
5083 5083 */
5084 5084 ASSERT(wait_time > 0);
5085 5085 wait_time = cv_reltimedwait_sig(
5086 5086 &zone_destroy_cv, &zonehash_lock, wait_time,
5087 5087 TR_SEC);
5088 5088 if (wait_time > 0) {
5089 5089 /*
5090 5090 * A thread in zone_rele() or
5091 5091 * zone_cred_rele() signaled
5092 5092 * zone_destroy_cv before this thread's
5093 5093 * wait timed out. The zone might have
5094 5094 * only one reference left; find out!
5095 5095 */
5096 5096 continue;
5097 5097 } else if (wait_time == 0) {
5098 5098 /* The thread's process was signaled. */
5099 5099 mutex_exit(&zonehash_lock);
5100 5100 return (set_errno(EINTR));
5101 5101 }
5102 5102
5103 5103 /*
5104 5104 * The thread timed out while waiting on
5105 5105 * zone_destroy_cv. Even though the thread
5106 5106 * timed out, it has to check whether another
5107 5107 * thread woke up from zone_destroy_cv and
5108 5108 * destroyed the zone.
5109 5109 *
5110 5110 * If the zone still exists and has more than
5111 5111 * one unreleased general-purpose reference,
5112 5112 * then log the zone's reference counts.
5113 5113 */
5114 5114 log_refcounts = B_TRUE;
5115 5115 continue;
5116 5116 }
5117 5117
5118 5118 /*
5119 5119 * The thread already timed out on zone_destroy_cv while
5120 5120 * waiting for subsystems to release the zone's last
5121 5121 * general-purpose references. Log the zone's reference
5122 5122 * counts and wait indefinitely on zone_destroy_cv.
5123 5123 */
5124 5124 zone_log_refcounts(zone);
5125 5125 }
5126 5126 if (cv_wait_sig(&zone_destroy_cv, &zonehash_lock) == 0) {
5127 5127 /* The thread's process was signaled. */
5128 5128 mutex_exit(&zonehash_lock);
5129 5129 return (set_errno(EINTR));
5130 5130 }
5131 5131 }
5132 5132
5133 5133 /*
5134 5134 * Remove CPU cap for this zone now since we're not going to
5135 5135 * fail below this point.
5136 5136 */
5137 5137 cpucaps_zone_remove(zone);
5138 5138
5139 5139 /* Get rid of the zone's kstats */
5140 5140 zone_kstat_delete(zone);
5141 5141
5142 5142 /* remove the pfexecd doors */
5143 5143 if (zone->zone_pfexecd != NULL) {
5144 5144 klpd_freelist(&zone->zone_pfexecd);
5145 5145 zone->zone_pfexecd = NULL;
5146 5146 }
5147 5147
5148 5148 /* free brand specific data */
5149 5149 if (ZONE_IS_BRANDED(zone))
5150 5150 ZBROP(zone)->b_free_brand_data(zone);
5151 5151
5152 5152 /* Say goodbye to brand framework. */
5153 5153 brand_unregister_zone(zone->zone_brand);
5154 5154
5155 5155 /*
5156 5156 * It is now safe to let the zone be recreated; remove it from the
5157 5157 * lists. The memory will not be freed until the last cred
5158 5158 * reference goes away.
5159 5159 */
5160 5160 ASSERT(zonecount > 1); /* must be > 1; can't destroy global zone */
5161 5161 zonecount--;
5162 5162 /* remove from active list and hash tables */
5163 5163 list_remove(&zone_active, zone);
5164 5164 (void) mod_hash_destroy(zonehashbyname,
5165 5165 (mod_hash_key_t)zone->zone_name);
5166 5166 (void) mod_hash_destroy(zonehashbyid,
5167 5167 (mod_hash_key_t)(uintptr_t)zone->zone_id);
5168 5168 if (zone->zone_flags & ZF_HASHED_LABEL)
5169 5169 (void) mod_hash_destroy(zonehashbylabel,
5170 5170 (mod_hash_key_t)zone->zone_slabel);
5171 5171 mutex_exit(&zonehash_lock);
5172 5172
5173 5173 /*
5174 5174 * Release the root vnode; we're not using it anymore. Nor should any
5175 5175 * other thread that might access it exist.
5176 5176 */
5177 5177 if (zone->zone_rootvp != NULL) {
5178 5178 VN_RELE(zone->zone_rootvp);
5179 5179 zone->zone_rootvp = NULL;
5180 5180 }
5181 5181
5182 5182 /* add to deathrow list */
5183 5183 mutex_enter(&zone_deathrow_lock);
5184 5184 list_insert_tail(&zone_deathrow, zone);
5185 5185 mutex_exit(&zone_deathrow_lock);
5186 5186
5187 5187 /*
5188 5188 * Drop last reference (which was added by zsched()), this will
5189 5189 * free the zone unless there are outstanding cred references.
5190 5190 */
5191 5191 zone_rele(zone);
5192 5192 return (0);
5193 5193 }
5194 5194
5195 5195 /*
5196 5196 * Systemcall entry point for zone_getattr(2).
5197 5197 */
5198 5198 static ssize_t
5199 5199 zone_getattr(zoneid_t zoneid, int attr, void *buf, size_t bufsize)
5200 5200 {
5201 5201 size_t size;
5202 5202 int error = 0, err;
5203 5203 zone_t *zone;
5204 5204 char *zonepath;
5205 5205 char *outstr;
5206 5206 zone_status_t zone_status;
5207 5207 pid_t initpid;
5208 5208 boolean_t global = (curzone == global_zone);
5209 5209 boolean_t inzone = (curzone->zone_id == zoneid);
5210 5210 ushort_t flags;
5211 5211 zone_net_data_t *zbuf;
5212 5212
5213 5213 mutex_enter(&zonehash_lock);
5214 5214 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
5215 5215 mutex_exit(&zonehash_lock);
5216 5216 return (set_errno(EINVAL));
5217 5217 }
5218 5218 zone_status = zone_status_get(zone);
5219 5219 if (zone_status < ZONE_IS_INITIALIZED) {
5220 5220 mutex_exit(&zonehash_lock);
5221 5221 return (set_errno(EINVAL));
5222 5222 }
5223 5223 zone_hold(zone);
5224 5224 mutex_exit(&zonehash_lock);
5225 5225
5226 5226 /*
5227 5227 * If not in the global zone, don't show information about other zones,
5228 5228 * unless the system is labeled and the local zone's label dominates
5229 5229 * the other zone.
5230 5230 */
5231 5231 if (!zone_list_access(zone)) {
5232 5232 zone_rele(zone);
5233 5233 return (set_errno(EINVAL));
5234 5234 }
5235 5235
5236 5236 switch (attr) {
5237 5237 case ZONE_ATTR_ROOT:
5238 5238 if (global) {
5239 5239 /*
5240 5240 * Copy the path to trim the trailing "/" (except for
5241 5241 * the global zone).
5242 5242 */
5243 5243 if (zone != global_zone)
5244 5244 size = zone->zone_rootpathlen - 1;
5245 5245 else
5246 5246 size = zone->zone_rootpathlen;
5247 5247 zonepath = kmem_alloc(size, KM_SLEEP);
5248 5248 bcopy(zone->zone_rootpath, zonepath, size);
5249 5249 zonepath[size - 1] = '\0';
5250 5250 } else {
5251 5251 if (inzone || !is_system_labeled()) {
5252 5252 /*
5253 5253 * Caller is not in the global zone.
5254 5254 * if the query is on the current zone
5255 5255 * or the system is not labeled,
5256 5256 * just return faked-up path for current zone.
5257 5257 */
5258 5258 zonepath = "/";
5259 5259 size = 2;
5260 5260 } else {
5261 5261 /*
5262 5262 * Return related path for current zone.
5263 5263 */
5264 5264 int prefix_len = strlen(zone_prefix);
5265 5265 int zname_len = strlen(zone->zone_name);
5266 5266
5267 5267 size = prefix_len + zname_len + 1;
5268 5268 zonepath = kmem_alloc(size, KM_SLEEP);
5269 5269 bcopy(zone_prefix, zonepath, prefix_len);
5270 5270 bcopy(zone->zone_name, zonepath +
5271 5271 prefix_len, zname_len);
5272 5272 zonepath[size - 1] = '\0';
5273 5273 }
5274 5274 }
5275 5275 if (bufsize > size)
5276 5276 bufsize = size;
5277 5277 if (buf != NULL) {
5278 5278 err = copyoutstr(zonepath, buf, bufsize, NULL);
5279 5279 if (err != 0 && err != ENAMETOOLONG)
5280 5280 error = EFAULT;
5281 5281 }
5282 5282 if (global || (is_system_labeled() && !inzone))
5283 5283 kmem_free(zonepath, size);
5284 5284 break;
5285 5285
5286 5286 case ZONE_ATTR_NAME:
5287 5287 size = strlen(zone->zone_name) + 1;
5288 5288 if (bufsize > size)
5289 5289 bufsize = size;
5290 5290 if (buf != NULL) {
5291 5291 err = copyoutstr(zone->zone_name, buf, bufsize, NULL);
5292 5292 if (err != 0 && err != ENAMETOOLONG)
5293 5293 error = EFAULT;
5294 5294 }
5295 5295 break;
5296 5296
5297 5297 case ZONE_ATTR_STATUS:
5298 5298 /*
5299 5299 * Since we're not holding zonehash_lock, the zone status
5300 5300 * may be anything; leave it up to userland to sort it out.
5301 5301 */
5302 5302 size = sizeof (zone_status);
5303 5303 if (bufsize > size)
5304 5304 bufsize = size;
5305 5305 zone_status = zone_status_get(zone);
5306 5306 if (buf != NULL &&
5307 5307 copyout(&zone_status, buf, bufsize) != 0)
5308 5308 error = EFAULT;
5309 5309 break;
5310 5310 case ZONE_ATTR_FLAGS:
5311 5311 size = sizeof (zone->zone_flags);
5312 5312 if (bufsize > size)
5313 5313 bufsize = size;
5314 5314 flags = zone->zone_flags;
5315 5315 if (buf != NULL &&
5316 5316 copyout(&flags, buf, bufsize) != 0)
5317 5317 error = EFAULT;
5318 5318 break;
5319 5319 case ZONE_ATTR_PRIVSET:
5320 5320 size = sizeof (priv_set_t);
5321 5321 if (bufsize > size)
5322 5322 bufsize = size;
5323 5323 if (buf != NULL &&
5324 5324 copyout(zone->zone_privset, buf, bufsize) != 0)
5325 5325 error = EFAULT;
5326 5326 break;
5327 5327 case ZONE_ATTR_UNIQID:
5328 5328 size = sizeof (zone->zone_uniqid);
5329 5329 if (bufsize > size)
5330 5330 bufsize = size;
5331 5331 if (buf != NULL &&
5332 5332 copyout(&zone->zone_uniqid, buf, bufsize) != 0)
5333 5333 error = EFAULT;
5334 5334 break;
5335 5335 case ZONE_ATTR_POOLID:
5336 5336 {
5337 5337 pool_t *pool;
5338 5338 poolid_t poolid;
5339 5339
5340 5340 if (pool_lock_intr() != 0) {
5341 5341 error = EINTR;
5342 5342 break;
5343 5343 }
5344 5344 pool = zone_pool_get(zone);
5345 5345 poolid = pool->pool_id;
5346 5346 pool_unlock();
5347 5347 size = sizeof (poolid);
5348 5348 if (bufsize > size)
5349 5349 bufsize = size;
5350 5350 if (buf != NULL && copyout(&poolid, buf, size) != 0)
5351 5351 error = EFAULT;
5352 5352 }
5353 5353 break;
5354 5354 case ZONE_ATTR_SLBL:
5355 5355 size = sizeof (bslabel_t);
5356 5356 if (bufsize > size)
5357 5357 bufsize = size;
5358 5358 if (zone->zone_slabel == NULL)
5359 5359 error = EINVAL;
5360 5360 else if (buf != NULL &&
5361 5361 copyout(label2bslabel(zone->zone_slabel), buf,
5362 5362 bufsize) != 0)
5363 5363 error = EFAULT;
5364 5364 break;
5365 5365 case ZONE_ATTR_INITPID:
5366 5366 size = sizeof (initpid);
5367 5367 if (bufsize > size)
5368 5368 bufsize = size;
5369 5369 initpid = zone->zone_proc_initpid;
5370 5370 if (initpid == -1) {
5371 5371 error = ESRCH;
5372 5372 break;
5373 5373 }
5374 5374 if (buf != NULL &&
5375 5375 copyout(&initpid, buf, bufsize) != 0)
5376 5376 error = EFAULT;
5377 5377 break;
5378 5378 case ZONE_ATTR_BRAND:
5379 5379 size = strlen(zone->zone_brand->b_name) + 1;
5380 5380
5381 5381 if (bufsize > size)
5382 5382 bufsize = size;
5383 5383 if (buf != NULL) {
5384 5384 err = copyoutstr(zone->zone_brand->b_name, buf,
5385 5385 bufsize, NULL);
5386 5386 if (err != 0 && err != ENAMETOOLONG)
5387 5387 error = EFAULT;
5388 5388 }
5389 5389 break;
5390 5390 case ZONE_ATTR_INITNAME:
5391 5391 size = strlen(zone->zone_initname) + 1;
5392 5392 if (bufsize > size)
5393 5393 bufsize = size;
5394 5394 if (buf != NULL) {
5395 5395 err = copyoutstr(zone->zone_initname, buf, bufsize,
5396 5396 NULL);
5397 5397 if (err != 0 && err != ENAMETOOLONG)
5398 5398 error = EFAULT;
5399 5399 }
5400 5400 break;
5401 5401 case ZONE_ATTR_BOOTARGS:
5402 5402 if (zone->zone_bootargs == NULL)
5403 5403 outstr = "";
5404 5404 else
5405 5405 outstr = zone->zone_bootargs;
5406 5406 size = strlen(outstr) + 1;
5407 5407 if (bufsize > size)
5408 5408 bufsize = size;
5409 5409 if (buf != NULL) {
5410 5410 err = copyoutstr(outstr, buf, bufsize, NULL);
5411 5411 if (err != 0 && err != ENAMETOOLONG)
5412 5412 error = EFAULT;
5413 5413 }
5414 5414 break;
5415 5415 case ZONE_ATTR_PHYS_MCAP:
5416 5416 size = sizeof (zone->zone_phys_mcap);
5417 5417 if (bufsize > size)
5418 5418 bufsize = size;
5419 5419 if (buf != NULL &&
5420 5420 copyout(&zone->zone_phys_mcap, buf, bufsize) != 0)
5421 5421 error = EFAULT;
5422 5422 break;
5423 5423 case ZONE_ATTR_SCHED_CLASS:
5424 5424 mutex_enter(&class_lock);
5425 5425
5426 5426 if (zone->zone_defaultcid >= loaded_classes)
5427 5427 outstr = "";
5428 5428 else
5429 5429 outstr = sclass[zone->zone_defaultcid].cl_name;
5430 5430 size = strlen(outstr) + 1;
5431 5431 if (bufsize > size)
5432 5432 bufsize = size;
5433 5433 if (buf != NULL) {
5434 5434 err = copyoutstr(outstr, buf, bufsize, NULL);
5435 5435 if (err != 0 && err != ENAMETOOLONG)
5436 5436 error = EFAULT;
5437 5437 }
5438 5438
5439 5439 mutex_exit(&class_lock);
5440 5440 break;
5441 5441 case ZONE_ATTR_HOSTID:
5442 5442 if (zone->zone_hostid != HW_INVALID_HOSTID &&
5443 5443 bufsize == sizeof (zone->zone_hostid)) {
5444 5444 size = sizeof (zone->zone_hostid);
5445 5445 if (buf != NULL && copyout(&zone->zone_hostid, buf,
5446 5446 bufsize) != 0)
5447 5447 error = EFAULT;
5448 5448 } else {
5449 5449 error = EINVAL;
5450 5450 }
5451 5451 break;
5452 5452 case ZONE_ATTR_FS_ALLOWED:
5453 5453 if (zone->zone_fs_allowed == NULL)
5454 5454 outstr = "";
5455 5455 else
5456 5456 outstr = zone->zone_fs_allowed;
5457 5457 size = strlen(outstr) + 1;
5458 5458 if (bufsize > size)
5459 5459 bufsize = size;
5460 5460 if (buf != NULL) {
5461 5461 err = copyoutstr(outstr, buf, bufsize, NULL);
5462 5462 if (err != 0 && err != ENAMETOOLONG)
5463 5463 error = EFAULT;
5464 5464 }
5465 5465 break;
5466 5466 case ZONE_ATTR_NETWORK:
5467 5467 zbuf = kmem_alloc(bufsize, KM_SLEEP);
5468 5468 if (copyin(buf, zbuf, bufsize) != 0) {
5469 5469 error = EFAULT;
5470 5470 } else {
5471 5471 error = zone_get_network(zoneid, zbuf);
5472 5472 if (error == 0 && copyout(zbuf, buf, bufsize) != 0)
5473 5473 error = EFAULT;
5474 5474 }
5475 5475 kmem_free(zbuf, bufsize);
5476 5476 break;
5477 5477 default:
5478 5478 if ((attr >= ZONE_ATTR_BRAND_ATTRS) && ZONE_IS_BRANDED(zone)) {
5479 5479 size = bufsize;
5480 5480 error = ZBROP(zone)->b_getattr(zone, attr, buf, &size);
5481 5481 } else {
5482 5482 error = EINVAL;
5483 5483 }
5484 5484 }
5485 5485 zone_rele(zone);
5486 5486
5487 5487 if (error)
5488 5488 return (set_errno(error));
5489 5489 return ((ssize_t)size);
5490 5490 }
5491 5491
5492 5492 /*
5493 5493 * Systemcall entry point for zone_setattr(2).
5494 5494 */
5495 5495 /*ARGSUSED*/
5496 5496 static int
5497 5497 zone_setattr(zoneid_t zoneid, int attr, void *buf, size_t bufsize)
5498 5498 {
5499 5499 zone_t *zone;
5500 5500 zone_status_t zone_status;
5501 5501 int err = -1;
5502 5502 zone_net_data_t *zbuf;
5503 5503
5504 5504 if (secpolicy_zone_config(CRED()) != 0)
5505 5505 return (set_errno(EPERM));
5506 5506
5507 5507 /*
5508 5508 * Only the ZONE_ATTR_PHYS_MCAP attribute can be set on the
5509 5509 * global zone.
5510 5510 */
5511 5511 if (zoneid == GLOBAL_ZONEID && attr != ZONE_ATTR_PHYS_MCAP) {
5512 5512 return (set_errno(EINVAL));
5513 5513 }
5514 5514
5515 5515 mutex_enter(&zonehash_lock);
5516 5516 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
5517 5517 mutex_exit(&zonehash_lock);
5518 5518 return (set_errno(EINVAL));
5519 5519 }
5520 5520 zone_hold(zone);
5521 5521 mutex_exit(&zonehash_lock);
5522 5522
5523 5523 /*
5524 5524 * At present most attributes can only be set on non-running,
5525 5525 * non-global zones.
5526 5526 */
5527 5527 zone_status = zone_status_get(zone);
5528 5528 if (attr != ZONE_ATTR_PHYS_MCAP && zone_status > ZONE_IS_READY) {
5529 5529 err = EINVAL;
5530 5530 goto done;
5531 5531 }
5532 5532
5533 5533 switch (attr) {
5534 5534 case ZONE_ATTR_INITNAME:
5535 5535 err = zone_set_initname(zone, (const char *)buf);
5536 5536 break;
5537 5537 case ZONE_ATTR_INITNORESTART:
5538 5538 zone->zone_restart_init = B_FALSE;
5539 5539 err = 0;
5540 5540 break;
5541 5541 case ZONE_ATTR_BOOTARGS:
5542 5542 err = zone_set_bootargs(zone, (const char *)buf);
5543 5543 break;
5544 5544 case ZONE_ATTR_BRAND:
5545 5545 err = zone_set_brand(zone, (const char *)buf);
5546 5546 break;
5547 5547 case ZONE_ATTR_FS_ALLOWED:
5548 5548 err = zone_set_fs_allowed(zone, (const char *)buf);
5549 5549 break;
5550 5550 case ZONE_ATTR_PHYS_MCAP:
5551 5551 err = zone_set_phys_mcap(zone, (const uint64_t *)buf);
5552 5552 break;
5553 5553 case ZONE_ATTR_SCHED_CLASS:
5554 5554 err = zone_set_sched_class(zone, (const char *)buf);
5555 5555 break;
5556 5556 case ZONE_ATTR_HOSTID:
5557 5557 if (bufsize == sizeof (zone->zone_hostid)) {
5558 5558 if (copyin(buf, &zone->zone_hostid, bufsize) == 0)
5559 5559 err = 0;
5560 5560 else
5561 5561 err = EFAULT;
5562 5562 } else {
5563 5563 err = EINVAL;
5564 5564 }
5565 5565 break;
5566 5566 case ZONE_ATTR_NETWORK:
5567 5567 if (bufsize > (PIPE_BUF + sizeof (zone_net_data_t))) {
5568 5568 err = EINVAL;
5569 5569 break;
5570 5570 }
5571 5571 zbuf = kmem_alloc(bufsize, KM_SLEEP);
5572 5572 if (copyin(buf, zbuf, bufsize) != 0) {
5573 5573 kmem_free(zbuf, bufsize);
5574 5574 err = EFAULT;
5575 5575 break;
5576 5576 }
5577 5577 err = zone_set_network(zoneid, zbuf);
5578 5578 kmem_free(zbuf, bufsize);
5579 5579 break;
5580 5580 default:
5581 5581 if ((attr >= ZONE_ATTR_BRAND_ATTRS) && ZONE_IS_BRANDED(zone))
5582 5582 err = ZBROP(zone)->b_setattr(zone, attr, buf, bufsize);
5583 5583 else
5584 5584 err = EINVAL;
5585 5585 }
5586 5586
5587 5587 done:
5588 5588 zone_rele(zone);
5589 5589 ASSERT(err != -1);
5590 5590 return (err != 0 ? set_errno(err) : 0);
5591 5591 }
5592 5592
5593 5593 /*
5594 5594 * Return zero if the process has at least one vnode mapped in to its
5595 5595 * address space which shouldn't be allowed to change zones.
5596 5596 *
5597 5597 * Also return zero if the process has any shared mappings which reserve
5598 5598 * swap. This is because the counting for zone.max-swap does not allow swap
5599 5599 * reservation to be shared between zones. zone swap reservation is counted
5600 5600 * on zone->zone_max_swap.
5601 5601 */
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5602 5602 static int
5603 5603 as_can_change_zones(void)
5604 5604 {
5605 5605 proc_t *pp = curproc;
5606 5606 struct seg *seg;
5607 5607 struct as *as = pp->p_as;
5608 5608 vnode_t *vp;
5609 5609 int allow = 1;
5610 5610
5611 5611 ASSERT(pp->p_as != &kas);
5612 - AS_LOCK_ENTER(as, &as->a_lock, RW_READER);
5612 + AS_LOCK_ENTER(as, RW_READER);
5613 5613 for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg)) {
5614 5614
5615 5615 /*
5616 5616 * Cannot enter zone with shared anon memory which
5617 5617 * reserves swap. See comment above.
5618 5618 */
5619 5619 if (seg_can_change_zones(seg) == B_FALSE) {
5620 5620 allow = 0;
5621 5621 break;
5622 5622 }
5623 5623 /*
5624 5624 * if we can't get a backing vnode for this segment then skip
|
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5625 5625 * it.
5626 5626 */
5627 5627 vp = NULL;
5628 5628 if (SEGOP_GETVP(seg, seg->s_base, &vp) != 0 || vp == NULL)
5629 5629 continue;
5630 5630 if (!vn_can_change_zones(vp)) { /* bail on first match */
5631 5631 allow = 0;
5632 5632 break;
5633 5633 }
5634 5634 }
5635 - AS_LOCK_EXIT(as, &as->a_lock);
5635 + AS_LOCK_EXIT(as);
5636 5636 return (allow);
5637 5637 }
5638 5638
5639 5639 /*
5640 5640 * Count swap reserved by curproc's address space
5641 5641 */
5642 5642 static size_t
5643 5643 as_swresv(void)
5644 5644 {
5645 5645 proc_t *pp = curproc;
5646 5646 struct seg *seg;
5647 5647 struct as *as = pp->p_as;
5648 5648 size_t swap = 0;
5649 5649
5650 5650 ASSERT(pp->p_as != &kas);
5651 - ASSERT(AS_WRITE_HELD(as, &as->a_lock));
5651 + ASSERT(AS_WRITE_HELD(as));
5652 5652 for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg))
5653 5653 swap += seg_swresv(seg);
5654 5654
5655 5655 return (swap);
5656 5656 }
5657 5657
5658 5658 /*
5659 5659 * Systemcall entry point for zone_enter().
5660 5660 *
5661 5661 * The current process is injected into said zone. In the process
5662 5662 * it will change its project membership, privileges, rootdir/cwd,
5663 5663 * zone-wide rctls, and pool association to match those of the zone.
5664 5664 *
5665 5665 * The first zone_enter() called while the zone is in the ZONE_IS_READY
5666 5666 * state will transition it to ZONE_IS_RUNNING. Processes may only
5667 5667 * enter a zone that is "ready" or "running".
5668 5668 */
5669 5669 static int
5670 5670 zone_enter(zoneid_t zoneid)
5671 5671 {
5672 5672 zone_t *zone;
5673 5673 vnode_t *vp;
5674 5674 proc_t *pp = curproc;
5675 5675 contract_t *ct;
5676 5676 cont_process_t *ctp;
5677 5677 task_t *tk, *oldtk;
5678 5678 kproject_t *zone_proj0;
5679 5679 cred_t *cr, *newcr;
5680 5680 pool_t *oldpool, *newpool;
5681 5681 sess_t *sp;
5682 5682 uid_t uid;
5683 5683 zone_status_t status;
5684 5684 int err = 0;
5685 5685 rctl_entity_p_t e;
5686 5686 size_t swap;
5687 5687 kthread_id_t t;
5688 5688
5689 5689 if (secpolicy_zone_config(CRED()) != 0)
5690 5690 return (set_errno(EPERM));
5691 5691 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID)
5692 5692 return (set_errno(EINVAL));
5693 5693
5694 5694 /*
5695 5695 * Stop all lwps so we don't need to hold a lock to look at
5696 5696 * curproc->p_zone. This needs to happen before we grab any
5697 5697 * locks to avoid deadlock (another lwp in the process could
5698 5698 * be waiting for the held lock).
5699 5699 */
5700 5700 if (curthread != pp->p_agenttp && !holdlwps(SHOLDFORK))
5701 5701 return (set_errno(EINTR));
5702 5702
5703 5703 /*
5704 5704 * Make sure we're not changing zones with files open or mapped in
5705 5705 * to our address space which shouldn't be changing zones.
5706 5706 */
5707 5707 if (!files_can_change_zones()) {
5708 5708 err = EBADF;
5709 5709 goto out;
5710 5710 }
5711 5711 if (!as_can_change_zones()) {
5712 5712 err = EFAULT;
5713 5713 goto out;
5714 5714 }
5715 5715
5716 5716 mutex_enter(&zonehash_lock);
5717 5717 if (pp->p_zone != global_zone) {
5718 5718 mutex_exit(&zonehash_lock);
5719 5719 err = EINVAL;
5720 5720 goto out;
5721 5721 }
5722 5722
5723 5723 zone = zone_find_all_by_id(zoneid);
5724 5724 if (zone == NULL) {
5725 5725 mutex_exit(&zonehash_lock);
5726 5726 err = EINVAL;
5727 5727 goto out;
5728 5728 }
5729 5729
5730 5730 /*
5731 5731 * To prevent processes in a zone from holding contracts on
5732 5732 * extrazonal resources, and to avoid process contract
5733 5733 * memberships which span zones, contract holders and processes
5734 5734 * which aren't the sole members of their encapsulating process
5735 5735 * contracts are not allowed to zone_enter.
5736 5736 */
5737 5737 ctp = pp->p_ct_process;
5738 5738 ct = &ctp->conp_contract;
5739 5739 mutex_enter(&ct->ct_lock);
5740 5740 mutex_enter(&pp->p_lock);
5741 5741 if ((avl_numnodes(&pp->p_ct_held) != 0) || (ctp->conp_nmembers != 1)) {
5742 5742 mutex_exit(&pp->p_lock);
5743 5743 mutex_exit(&ct->ct_lock);
5744 5744 mutex_exit(&zonehash_lock);
5745 5745 err = EINVAL;
5746 5746 goto out;
5747 5747 }
5748 5748
5749 5749 /*
5750 5750 * Moreover, we don't allow processes whose encapsulating
5751 5751 * process contracts have inherited extrazonal contracts.
5752 5752 * While it would be easier to eliminate all process contracts
5753 5753 * with inherited contracts, we need to be able to give a
5754 5754 * restarted init (or other zone-penetrating process) its
5755 5755 * predecessor's contracts.
5756 5756 */
5757 5757 if (ctp->conp_ninherited != 0) {
5758 5758 contract_t *next;
5759 5759 for (next = list_head(&ctp->conp_inherited); next;
5760 5760 next = list_next(&ctp->conp_inherited, next)) {
5761 5761 if (contract_getzuniqid(next) != zone->zone_uniqid) {
5762 5762 mutex_exit(&pp->p_lock);
5763 5763 mutex_exit(&ct->ct_lock);
5764 5764 mutex_exit(&zonehash_lock);
5765 5765 err = EINVAL;
5766 5766 goto out;
5767 5767 }
5768 5768 }
5769 5769 }
5770 5770
5771 5771 mutex_exit(&pp->p_lock);
5772 5772 mutex_exit(&ct->ct_lock);
5773 5773
5774 5774 status = zone_status_get(zone);
5775 5775 if (status < ZONE_IS_READY || status >= ZONE_IS_SHUTTING_DOWN) {
5776 5776 /*
5777 5777 * Can't join
5778 5778 */
5779 5779 mutex_exit(&zonehash_lock);
5780 5780 err = EINVAL;
5781 5781 goto out;
5782 5782 }
5783 5783
5784 5784 /*
5785 5785 * Make sure new priv set is within the permitted set for caller
5786 5786 */
5787 5787 if (!priv_issubset(zone->zone_privset, &CR_OPPRIV(CRED()))) {
5788 5788 mutex_exit(&zonehash_lock);
5789 5789 err = EPERM;
5790 5790 goto out;
5791 5791 }
5792 5792 /*
5793 5793 * We want to momentarily drop zonehash_lock while we optimistically
5794 5794 * bind curproc to the pool it should be running in. This is safe
5795 5795 * since the zone can't disappear (we have a hold on it).
5796 5796 */
5797 5797 zone_hold(zone);
5798 5798 mutex_exit(&zonehash_lock);
5799 5799
5800 5800 /*
5801 5801 * Grab pool_lock to keep the pools configuration from changing
5802 5802 * and to stop ourselves from getting rebound to another pool
5803 5803 * until we join the zone.
5804 5804 */
5805 5805 if (pool_lock_intr() != 0) {
5806 5806 zone_rele(zone);
5807 5807 err = EINTR;
5808 5808 goto out;
5809 5809 }
5810 5810 ASSERT(secpolicy_pool(CRED()) == 0);
5811 5811 /*
5812 5812 * Bind ourselves to the pool currently associated with the zone.
5813 5813 */
5814 5814 oldpool = curproc->p_pool;
5815 5815 newpool = zone_pool_get(zone);
5816 5816 if (pool_state == POOL_ENABLED && newpool != oldpool &&
5817 5817 (err = pool_do_bind(newpool, P_PID, P_MYID,
5818 5818 POOL_BIND_ALL)) != 0) {
5819 5819 pool_unlock();
5820 5820 zone_rele(zone);
5821 5821 goto out;
5822 5822 }
5823 5823
5824 5824 /*
5825 5825 * Grab cpu_lock now; we'll need it later when we call
5826 5826 * task_join().
5827 5827 */
5828 5828 mutex_enter(&cpu_lock);
5829 5829 mutex_enter(&zonehash_lock);
5830 5830 /*
5831 5831 * Make sure the zone hasn't moved on since we dropped zonehash_lock.
5832 5832 */
5833 5833 if (zone_status_get(zone) >= ZONE_IS_SHUTTING_DOWN) {
5834 5834 /*
5835 5835 * Can't join anymore.
5836 5836 */
5837 5837 mutex_exit(&zonehash_lock);
5838 5838 mutex_exit(&cpu_lock);
5839 5839 if (pool_state == POOL_ENABLED &&
5840 5840 newpool != oldpool)
5841 5841 (void) pool_do_bind(oldpool, P_PID, P_MYID,
5842 5842 POOL_BIND_ALL);
5843 5843 pool_unlock();
5844 5844 zone_rele(zone);
5845 5845 err = EINVAL;
|
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↑ open up ↑ |
5846 5846 goto out;
5847 5847 }
5848 5848
5849 5849 /*
5850 5850 * a_lock must be held while transfering locked memory and swap
5851 5851 * reservation from the global zone to the non global zone because
5852 5852 * asynchronous faults on the processes' address space can lock
5853 5853 * memory and reserve swap via MCL_FUTURE and MAP_NORESERVE
5854 5854 * segments respectively.
5855 5855 */
5856 - AS_LOCK_ENTER(pp->as, &pp->p_as->a_lock, RW_WRITER);
5856 + AS_LOCK_ENTER(pp->p_as, RW_WRITER);
5857 5857 swap = as_swresv();
5858 5858 mutex_enter(&pp->p_lock);
5859 5859 zone_proj0 = zone->zone_zsched->p_task->tk_proj;
5860 5860 /* verify that we do not exceed and task or lwp limits */
5861 5861 mutex_enter(&zone->zone_nlwps_lock);
5862 5862 /* add new lwps to zone and zone's proj0 */
5863 5863 zone_proj0->kpj_nlwps += pp->p_lwpcnt;
5864 5864 zone->zone_nlwps += pp->p_lwpcnt;
5865 5865 /* add 1 task to zone's proj0 */
5866 5866 zone_proj0->kpj_ntasks += 1;
5867 5867
5868 5868 zone_proj0->kpj_nprocs++;
5869 5869 zone->zone_nprocs++;
5870 5870 mutex_exit(&zone->zone_nlwps_lock);
5871 5871
5872 5872 mutex_enter(&zone->zone_mem_lock);
5873 5873 zone->zone_locked_mem += pp->p_locked_mem;
5874 5874 zone_proj0->kpj_data.kpd_locked_mem += pp->p_locked_mem;
5875 5875 zone->zone_max_swap += swap;
5876 5876 mutex_exit(&zone->zone_mem_lock);
5877 5877
5878 5878 mutex_enter(&(zone_proj0->kpj_data.kpd_crypto_lock));
5879 5879 zone_proj0->kpj_data.kpd_crypto_mem += pp->p_crypto_mem;
5880 5880 mutex_exit(&(zone_proj0->kpj_data.kpd_crypto_lock));
5881 5881
5882 5882 /* remove lwps and process from proc's old zone and old project */
5883 5883 mutex_enter(&pp->p_zone->zone_nlwps_lock);
5884 5884 pp->p_zone->zone_nlwps -= pp->p_lwpcnt;
5885 5885 pp->p_task->tk_proj->kpj_nlwps -= pp->p_lwpcnt;
5886 5886 pp->p_task->tk_proj->kpj_nprocs--;
5887 5887 pp->p_zone->zone_nprocs--;
5888 5888 mutex_exit(&pp->p_zone->zone_nlwps_lock);
5889 5889
5890 5890 mutex_enter(&pp->p_zone->zone_mem_lock);
5891 5891 pp->p_zone->zone_locked_mem -= pp->p_locked_mem;
5892 5892 pp->p_task->tk_proj->kpj_data.kpd_locked_mem -= pp->p_locked_mem;
|
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26 lines elided |
↑ open up ↑ |
5893 5893 pp->p_zone->zone_max_swap -= swap;
5894 5894 mutex_exit(&pp->p_zone->zone_mem_lock);
5895 5895
5896 5896 mutex_enter(&(pp->p_task->tk_proj->kpj_data.kpd_crypto_lock));
5897 5897 pp->p_task->tk_proj->kpj_data.kpd_crypto_mem -= pp->p_crypto_mem;
5898 5898 mutex_exit(&(pp->p_task->tk_proj->kpj_data.kpd_crypto_lock));
5899 5899
5900 5900 pp->p_flag |= SZONETOP;
5901 5901 pp->p_zone = zone;
5902 5902 mutex_exit(&pp->p_lock);
5903 - AS_LOCK_EXIT(pp->p_as, &pp->p_as->a_lock);
5903 + AS_LOCK_EXIT(pp->p_as);
5904 5904
5905 5905 /*
5906 5906 * Joining the zone cannot fail from now on.
5907 5907 *
5908 5908 * This means that a lot of the following code can be commonized and
5909 5909 * shared with zsched().
5910 5910 */
5911 5911
5912 5912 /*
5913 5913 * If the process contract fmri was inherited, we need to
5914 5914 * flag this so that any contract status will not leak
5915 5915 * extra zone information, svc_fmri in this case
5916 5916 */
5917 5917 if (ctp->conp_svc_ctid != ct->ct_id) {
5918 5918 mutex_enter(&ct->ct_lock);
5919 5919 ctp->conp_svc_zone_enter = ct->ct_id;
5920 5920 mutex_exit(&ct->ct_lock);
5921 5921 }
5922 5922
5923 5923 /*
5924 5924 * Reset the encapsulating process contract's zone.
5925 5925 */
5926 5926 ASSERT(ct->ct_mzuniqid == GLOBAL_ZONEUNIQID);
5927 5927 contract_setzuniqid(ct, zone->zone_uniqid);
5928 5928
5929 5929 /*
5930 5930 * Create a new task and associate the process with the project keyed
5931 5931 * by (projid,zoneid).
5932 5932 *
5933 5933 * We might as well be in project 0; the global zone's projid doesn't
5934 5934 * make much sense in a zone anyhow.
5935 5935 *
5936 5936 * This also increments zone_ntasks, and returns with p_lock held.
5937 5937 */
5938 5938 tk = task_create(0, zone);
5939 5939 oldtk = task_join(tk, 0);
5940 5940 mutex_exit(&cpu_lock);
5941 5941
5942 5942 /*
5943 5943 * call RCTLOP_SET functions on this proc
5944 5944 */
5945 5945 e.rcep_p.zone = zone;
5946 5946 e.rcep_t = RCENTITY_ZONE;
5947 5947 (void) rctl_set_dup(NULL, NULL, pp, &e, zone->zone_rctls, NULL,
5948 5948 RCD_CALLBACK);
5949 5949 mutex_exit(&pp->p_lock);
5950 5950
5951 5951 /*
5952 5952 * We don't need to hold any of zsched's locks here; not only do we know
5953 5953 * the process and zone aren't going away, we know its session isn't
5954 5954 * changing either.
5955 5955 *
5956 5956 * By joining zsched's session here, we mimic the behavior in the
5957 5957 * global zone of init's sid being the pid of sched. We extend this
5958 5958 * to all zlogin-like zone_enter()'ing processes as well.
5959 5959 */
5960 5960 mutex_enter(&pidlock);
5961 5961 sp = zone->zone_zsched->p_sessp;
5962 5962 sess_hold(zone->zone_zsched);
5963 5963 mutex_enter(&pp->p_lock);
5964 5964 pgexit(pp);
5965 5965 sess_rele(pp->p_sessp, B_TRUE);
5966 5966 pp->p_sessp = sp;
5967 5967 pgjoin(pp, zone->zone_zsched->p_pidp);
5968 5968
5969 5969 /*
5970 5970 * If any threads are scheduled to be placed on zone wait queue they
5971 5971 * should abandon the idea since the wait queue is changing.
5972 5972 * We need to be holding pidlock & p_lock to do this.
5973 5973 */
5974 5974 if ((t = pp->p_tlist) != NULL) {
5975 5975 do {
5976 5976 thread_lock(t);
5977 5977 /*
5978 5978 * Kick this thread so that he doesn't sit
5979 5979 * on a wrong wait queue.
5980 5980 */
5981 5981 if (ISWAITING(t))
5982 5982 setrun_locked(t);
5983 5983
5984 5984 if (t->t_schedflag & TS_ANYWAITQ)
5985 5985 t->t_schedflag &= ~ TS_ANYWAITQ;
5986 5986
5987 5987 thread_unlock(t);
5988 5988 } while ((t = t->t_forw) != pp->p_tlist);
5989 5989 }
5990 5990
5991 5991 /*
5992 5992 * If there is a default scheduling class for the zone and it is not
5993 5993 * the class we are currently in, change all of the threads in the
5994 5994 * process to the new class. We need to be holding pidlock & p_lock
5995 5995 * when we call parmsset so this is a good place to do it.
5996 5996 */
5997 5997 if (zone->zone_defaultcid > 0 &&
5998 5998 zone->zone_defaultcid != curthread->t_cid) {
5999 5999 pcparms_t pcparms;
6000 6000
6001 6001 pcparms.pc_cid = zone->zone_defaultcid;
6002 6002 pcparms.pc_clparms[0] = 0;
6003 6003
6004 6004 /*
6005 6005 * If setting the class fails, we still want to enter the zone.
6006 6006 */
6007 6007 if ((t = pp->p_tlist) != NULL) {
6008 6008 do {
6009 6009 (void) parmsset(&pcparms, t);
6010 6010 } while ((t = t->t_forw) != pp->p_tlist);
6011 6011 }
6012 6012 }
6013 6013
6014 6014 mutex_exit(&pp->p_lock);
6015 6015 mutex_exit(&pidlock);
6016 6016
6017 6017 mutex_exit(&zonehash_lock);
6018 6018 /*
6019 6019 * We're firmly in the zone; let pools progress.
6020 6020 */
6021 6021 pool_unlock();
6022 6022 task_rele(oldtk);
6023 6023 /*
6024 6024 * We don't need to retain a hold on the zone since we already
6025 6025 * incremented zone_ntasks, so the zone isn't going anywhere.
6026 6026 */
6027 6027 zone_rele(zone);
6028 6028
6029 6029 /*
6030 6030 * Chroot
6031 6031 */
6032 6032 vp = zone->zone_rootvp;
6033 6033 zone_chdir(vp, &PTOU(pp)->u_cdir, pp);
6034 6034 zone_chdir(vp, &PTOU(pp)->u_rdir, pp);
6035 6035
6036 6036 /*
6037 6037 * Change process credentials
6038 6038 */
6039 6039 newcr = cralloc();
6040 6040 mutex_enter(&pp->p_crlock);
6041 6041 cr = pp->p_cred;
6042 6042 crcopy_to(cr, newcr);
6043 6043 crsetzone(newcr, zone);
6044 6044 pp->p_cred = newcr;
6045 6045
6046 6046 /*
6047 6047 * Restrict all process privilege sets to zone limit
6048 6048 */
6049 6049 priv_intersect(zone->zone_privset, &CR_PPRIV(newcr));
6050 6050 priv_intersect(zone->zone_privset, &CR_EPRIV(newcr));
6051 6051 priv_intersect(zone->zone_privset, &CR_IPRIV(newcr));
6052 6052 priv_intersect(zone->zone_privset, &CR_LPRIV(newcr));
6053 6053 mutex_exit(&pp->p_crlock);
6054 6054 crset(pp, newcr);
6055 6055
6056 6056 /*
6057 6057 * Adjust upcount to reflect zone entry.
6058 6058 */
6059 6059 uid = crgetruid(newcr);
6060 6060 mutex_enter(&pidlock);
6061 6061 upcount_dec(uid, GLOBAL_ZONEID);
6062 6062 upcount_inc(uid, zoneid);
6063 6063 mutex_exit(&pidlock);
6064 6064
6065 6065 /*
6066 6066 * Set up core file path and content.
6067 6067 */
6068 6068 set_core_defaults();
6069 6069
6070 6070 out:
6071 6071 /*
6072 6072 * Let the other lwps continue.
6073 6073 */
6074 6074 mutex_enter(&pp->p_lock);
6075 6075 if (curthread != pp->p_agenttp)
6076 6076 continuelwps(pp);
6077 6077 mutex_exit(&pp->p_lock);
6078 6078
6079 6079 return (err != 0 ? set_errno(err) : 0);
6080 6080 }
6081 6081
6082 6082 /*
6083 6083 * Systemcall entry point for zone_list(2).
6084 6084 *
6085 6085 * Processes running in a (non-global) zone only see themselves.
6086 6086 * On labeled systems, they see all zones whose label they dominate.
6087 6087 */
6088 6088 static int
6089 6089 zone_list(zoneid_t *zoneidlist, uint_t *numzones)
6090 6090 {
6091 6091 zoneid_t *zoneids;
6092 6092 zone_t *zone, *myzone;
6093 6093 uint_t user_nzones, real_nzones;
6094 6094 uint_t domi_nzones;
6095 6095 int error;
6096 6096
6097 6097 if (copyin(numzones, &user_nzones, sizeof (uint_t)) != 0)
6098 6098 return (set_errno(EFAULT));
6099 6099
6100 6100 myzone = curproc->p_zone;
6101 6101 if (myzone != global_zone) {
6102 6102 bslabel_t *mybslab;
6103 6103
6104 6104 if (!is_system_labeled()) {
6105 6105 /* just return current zone */
6106 6106 real_nzones = domi_nzones = 1;
6107 6107 zoneids = kmem_alloc(sizeof (zoneid_t), KM_SLEEP);
6108 6108 zoneids[0] = myzone->zone_id;
6109 6109 } else {
6110 6110 /* return all zones that are dominated */
6111 6111 mutex_enter(&zonehash_lock);
6112 6112 real_nzones = zonecount;
6113 6113 domi_nzones = 0;
6114 6114 if (real_nzones > 0) {
6115 6115 zoneids = kmem_alloc(real_nzones *
6116 6116 sizeof (zoneid_t), KM_SLEEP);
6117 6117 mybslab = label2bslabel(myzone->zone_slabel);
6118 6118 for (zone = list_head(&zone_active);
6119 6119 zone != NULL;
6120 6120 zone = list_next(&zone_active, zone)) {
6121 6121 if (zone->zone_id == GLOBAL_ZONEID)
6122 6122 continue;
6123 6123 if (zone != myzone &&
6124 6124 (zone->zone_flags & ZF_IS_SCRATCH))
6125 6125 continue;
6126 6126 /*
6127 6127 * Note that a label always dominates
6128 6128 * itself, so myzone is always included
6129 6129 * in the list.
6130 6130 */
6131 6131 if (bldominates(mybslab,
6132 6132 label2bslabel(zone->zone_slabel))) {
6133 6133 zoneids[domi_nzones++] =
6134 6134 zone->zone_id;
6135 6135 }
6136 6136 }
6137 6137 }
6138 6138 mutex_exit(&zonehash_lock);
6139 6139 }
6140 6140 } else {
6141 6141 mutex_enter(&zonehash_lock);
6142 6142 real_nzones = zonecount;
6143 6143 domi_nzones = 0;
6144 6144 if (real_nzones > 0) {
6145 6145 zoneids = kmem_alloc(real_nzones * sizeof (zoneid_t),
6146 6146 KM_SLEEP);
6147 6147 for (zone = list_head(&zone_active); zone != NULL;
6148 6148 zone = list_next(&zone_active, zone))
6149 6149 zoneids[domi_nzones++] = zone->zone_id;
6150 6150 ASSERT(domi_nzones == real_nzones);
6151 6151 }
6152 6152 mutex_exit(&zonehash_lock);
6153 6153 }
6154 6154
6155 6155 /*
6156 6156 * If user has allocated space for fewer entries than we found, then
6157 6157 * return only up to his limit. Either way, tell him exactly how many
6158 6158 * we found.
6159 6159 */
6160 6160 if (domi_nzones < user_nzones)
6161 6161 user_nzones = domi_nzones;
6162 6162 error = 0;
6163 6163 if (copyout(&domi_nzones, numzones, sizeof (uint_t)) != 0) {
6164 6164 error = EFAULT;
6165 6165 } else if (zoneidlist != NULL && user_nzones != 0) {
6166 6166 if (copyout(zoneids, zoneidlist,
6167 6167 user_nzones * sizeof (zoneid_t)) != 0)
6168 6168 error = EFAULT;
6169 6169 }
6170 6170
6171 6171 if (real_nzones > 0)
6172 6172 kmem_free(zoneids, real_nzones * sizeof (zoneid_t));
6173 6173
6174 6174 if (error != 0)
6175 6175 return (set_errno(error));
6176 6176 else
6177 6177 return (0);
6178 6178 }
6179 6179
6180 6180 /*
6181 6181 * Systemcall entry point for zone_lookup(2).
6182 6182 *
6183 6183 * Non-global zones are only able to see themselves and (on labeled systems)
6184 6184 * the zones they dominate.
6185 6185 */
6186 6186 static zoneid_t
6187 6187 zone_lookup(const char *zone_name)
6188 6188 {
6189 6189 char *kname;
6190 6190 zone_t *zone;
6191 6191 zoneid_t zoneid;
6192 6192 int err;
6193 6193
6194 6194 if (zone_name == NULL) {
6195 6195 /* return caller's zone id */
6196 6196 return (getzoneid());
6197 6197 }
6198 6198
6199 6199 kname = kmem_zalloc(ZONENAME_MAX, KM_SLEEP);
6200 6200 if ((err = copyinstr(zone_name, kname, ZONENAME_MAX, NULL)) != 0) {
6201 6201 kmem_free(kname, ZONENAME_MAX);
6202 6202 return (set_errno(err));
6203 6203 }
6204 6204
6205 6205 mutex_enter(&zonehash_lock);
6206 6206 zone = zone_find_all_by_name(kname);
6207 6207 kmem_free(kname, ZONENAME_MAX);
6208 6208 /*
6209 6209 * In a non-global zone, can only lookup global and own name.
6210 6210 * In Trusted Extensions zone label dominance rules apply.
6211 6211 */
6212 6212 if (zone == NULL ||
6213 6213 zone_status_get(zone) < ZONE_IS_READY ||
6214 6214 !zone_list_access(zone)) {
6215 6215 mutex_exit(&zonehash_lock);
6216 6216 return (set_errno(EINVAL));
6217 6217 } else {
6218 6218 zoneid = zone->zone_id;
6219 6219 mutex_exit(&zonehash_lock);
6220 6220 return (zoneid);
6221 6221 }
6222 6222 }
6223 6223
6224 6224 static int
6225 6225 zone_version(int *version_arg)
6226 6226 {
6227 6227 int version = ZONE_SYSCALL_API_VERSION;
6228 6228
6229 6229 if (copyout(&version, version_arg, sizeof (int)) != 0)
6230 6230 return (set_errno(EFAULT));
6231 6231 return (0);
6232 6232 }
6233 6233
6234 6234 /* ARGSUSED */
6235 6235 long
6236 6236 zone(int cmd, void *arg1, void *arg2, void *arg3, void *arg4)
6237 6237 {
6238 6238 zone_def zs;
6239 6239 int err;
6240 6240
6241 6241 switch (cmd) {
6242 6242 case ZONE_CREATE:
6243 6243 if (get_udatamodel() == DATAMODEL_NATIVE) {
6244 6244 if (copyin(arg1, &zs, sizeof (zone_def))) {
6245 6245 return (set_errno(EFAULT));
6246 6246 }
6247 6247 } else {
6248 6248 #ifdef _SYSCALL32_IMPL
6249 6249 zone_def32 zs32;
6250 6250
6251 6251 if (copyin(arg1, &zs32, sizeof (zone_def32))) {
6252 6252 return (set_errno(EFAULT));
6253 6253 }
6254 6254 zs.zone_name =
6255 6255 (const char *)(unsigned long)zs32.zone_name;
6256 6256 zs.zone_root =
6257 6257 (const char *)(unsigned long)zs32.zone_root;
6258 6258 zs.zone_privs =
6259 6259 (const struct priv_set *)
6260 6260 (unsigned long)zs32.zone_privs;
6261 6261 zs.zone_privssz = zs32.zone_privssz;
6262 6262 zs.rctlbuf = (caddr_t)(unsigned long)zs32.rctlbuf;
6263 6263 zs.rctlbufsz = zs32.rctlbufsz;
6264 6264 zs.zfsbuf = (caddr_t)(unsigned long)zs32.zfsbuf;
6265 6265 zs.zfsbufsz = zs32.zfsbufsz;
6266 6266 zs.extended_error =
6267 6267 (int *)(unsigned long)zs32.extended_error;
6268 6268 zs.match = zs32.match;
6269 6269 zs.doi = zs32.doi;
6270 6270 zs.label = (const bslabel_t *)(uintptr_t)zs32.label;
6271 6271 zs.flags = zs32.flags;
6272 6272 #else
6273 6273 panic("get_udatamodel() returned bogus result\n");
6274 6274 #endif
6275 6275 }
6276 6276
6277 6277 return (zone_create(zs.zone_name, zs.zone_root,
6278 6278 zs.zone_privs, zs.zone_privssz,
6279 6279 (caddr_t)zs.rctlbuf, zs.rctlbufsz,
6280 6280 (caddr_t)zs.zfsbuf, zs.zfsbufsz,
6281 6281 zs.extended_error, zs.match, zs.doi,
6282 6282 zs.label, zs.flags));
6283 6283 case ZONE_BOOT:
6284 6284 return (zone_boot((zoneid_t)(uintptr_t)arg1));
6285 6285 case ZONE_DESTROY:
6286 6286 return (zone_destroy((zoneid_t)(uintptr_t)arg1));
6287 6287 case ZONE_GETATTR:
6288 6288 return (zone_getattr((zoneid_t)(uintptr_t)arg1,
6289 6289 (int)(uintptr_t)arg2, arg3, (size_t)arg4));
6290 6290 case ZONE_SETATTR:
6291 6291 return (zone_setattr((zoneid_t)(uintptr_t)arg1,
6292 6292 (int)(uintptr_t)arg2, arg3, (size_t)arg4));
6293 6293 case ZONE_ENTER:
6294 6294 return (zone_enter((zoneid_t)(uintptr_t)arg1));
6295 6295 case ZONE_LIST:
6296 6296 return (zone_list((zoneid_t *)arg1, (uint_t *)arg2));
6297 6297 case ZONE_SHUTDOWN:
6298 6298 return (zone_shutdown((zoneid_t)(uintptr_t)arg1));
6299 6299 case ZONE_LOOKUP:
6300 6300 return (zone_lookup((const char *)arg1));
6301 6301 case ZONE_VERSION:
6302 6302 return (zone_version((int *)arg1));
6303 6303 case ZONE_ADD_DATALINK:
6304 6304 return (zone_add_datalink((zoneid_t)(uintptr_t)arg1,
6305 6305 (datalink_id_t)(uintptr_t)arg2));
6306 6306 case ZONE_DEL_DATALINK:
6307 6307 return (zone_remove_datalink((zoneid_t)(uintptr_t)arg1,
6308 6308 (datalink_id_t)(uintptr_t)arg2));
6309 6309 case ZONE_CHECK_DATALINK: {
6310 6310 zoneid_t zoneid;
6311 6311 boolean_t need_copyout;
6312 6312
6313 6313 if (copyin(arg1, &zoneid, sizeof (zoneid)) != 0)
6314 6314 return (EFAULT);
6315 6315 need_copyout = (zoneid == ALL_ZONES);
6316 6316 err = zone_check_datalink(&zoneid,
6317 6317 (datalink_id_t)(uintptr_t)arg2);
6318 6318 if (err == 0 && need_copyout) {
6319 6319 if (copyout(&zoneid, arg1, sizeof (zoneid)) != 0)
6320 6320 err = EFAULT;
6321 6321 }
6322 6322 return (err == 0 ? 0 : set_errno(err));
6323 6323 }
6324 6324 case ZONE_LIST_DATALINK:
6325 6325 return (zone_list_datalink((zoneid_t)(uintptr_t)arg1,
6326 6326 (int *)arg2, (datalink_id_t *)(uintptr_t)arg3));
6327 6327 default:
6328 6328 return (set_errno(EINVAL));
6329 6329 }
6330 6330 }
6331 6331
6332 6332 struct zarg {
6333 6333 zone_t *zone;
6334 6334 zone_cmd_arg_t arg;
6335 6335 };
6336 6336
6337 6337 static int
6338 6338 zone_lookup_door(const char *zone_name, door_handle_t *doorp)
6339 6339 {
6340 6340 char *buf;
6341 6341 size_t buflen;
6342 6342 int error;
6343 6343
6344 6344 buflen = sizeof (ZONE_DOOR_PATH) + strlen(zone_name);
6345 6345 buf = kmem_alloc(buflen, KM_SLEEP);
6346 6346 (void) snprintf(buf, buflen, ZONE_DOOR_PATH, zone_name);
6347 6347 error = door_ki_open(buf, doorp);
6348 6348 kmem_free(buf, buflen);
6349 6349 return (error);
6350 6350 }
6351 6351
6352 6352 static void
6353 6353 zone_release_door(door_handle_t *doorp)
6354 6354 {
6355 6355 door_ki_rele(*doorp);
6356 6356 *doorp = NULL;
6357 6357 }
6358 6358
6359 6359 static void
6360 6360 zone_ki_call_zoneadmd(struct zarg *zargp)
6361 6361 {
6362 6362 door_handle_t door = NULL;
6363 6363 door_arg_t darg, save_arg;
6364 6364 char *zone_name;
6365 6365 size_t zone_namelen;
6366 6366 zoneid_t zoneid;
6367 6367 zone_t *zone;
6368 6368 zone_cmd_arg_t arg;
6369 6369 uint64_t uniqid;
6370 6370 size_t size;
6371 6371 int error;
6372 6372 int retry;
6373 6373
6374 6374 zone = zargp->zone;
6375 6375 arg = zargp->arg;
6376 6376 kmem_free(zargp, sizeof (*zargp));
6377 6377
6378 6378 zone_namelen = strlen(zone->zone_name) + 1;
6379 6379 zone_name = kmem_alloc(zone_namelen, KM_SLEEP);
6380 6380 bcopy(zone->zone_name, zone_name, zone_namelen);
6381 6381 zoneid = zone->zone_id;
6382 6382 uniqid = zone->zone_uniqid;
6383 6383 /*
6384 6384 * zoneadmd may be down, but at least we can empty out the zone.
6385 6385 * We can ignore the return value of zone_empty() since we're called
6386 6386 * from a kernel thread and know we won't be delivered any signals.
6387 6387 */
6388 6388 ASSERT(curproc == &p0);
6389 6389 (void) zone_empty(zone);
6390 6390 ASSERT(zone_status_get(zone) >= ZONE_IS_EMPTY);
6391 6391 zone_rele(zone);
6392 6392
6393 6393 size = sizeof (arg);
6394 6394 darg.rbuf = (char *)&arg;
6395 6395 darg.data_ptr = (char *)&arg;
6396 6396 darg.rsize = size;
6397 6397 darg.data_size = size;
6398 6398 darg.desc_ptr = NULL;
6399 6399 darg.desc_num = 0;
6400 6400
6401 6401 save_arg = darg;
6402 6402 /*
6403 6403 * Since we're not holding a reference to the zone, any number of
6404 6404 * things can go wrong, including the zone disappearing before we get a
6405 6405 * chance to talk to zoneadmd.
6406 6406 */
6407 6407 for (retry = 0; /* forever */; retry++) {
6408 6408 if (door == NULL &&
6409 6409 (error = zone_lookup_door(zone_name, &door)) != 0) {
6410 6410 goto next;
6411 6411 }
6412 6412 ASSERT(door != NULL);
6413 6413
6414 6414 if ((error = door_ki_upcall_limited(door, &darg, NULL,
6415 6415 SIZE_MAX, 0)) == 0) {
6416 6416 break;
6417 6417 }
6418 6418 switch (error) {
6419 6419 case EINTR:
6420 6420 /* FALLTHROUGH */
6421 6421 case EAGAIN: /* process may be forking */
6422 6422 /*
6423 6423 * Back off for a bit
6424 6424 */
6425 6425 break;
6426 6426 case EBADF:
6427 6427 zone_release_door(&door);
6428 6428 if (zone_lookup_door(zone_name, &door) != 0) {
6429 6429 /*
6430 6430 * zoneadmd may be dead, but it may come back to
6431 6431 * life later.
6432 6432 */
6433 6433 break;
6434 6434 }
6435 6435 break;
6436 6436 default:
6437 6437 cmn_err(CE_WARN,
6438 6438 "zone_ki_call_zoneadmd: door_ki_upcall error %d\n",
6439 6439 error);
6440 6440 goto out;
6441 6441 }
6442 6442 next:
6443 6443 /*
6444 6444 * If this isn't the same zone_t that we originally had in mind,
6445 6445 * then this is the same as if two kadmin requests come in at
6446 6446 * the same time: the first one wins. This means we lose, so we
6447 6447 * bail.
6448 6448 */
6449 6449 if ((zone = zone_find_by_id(zoneid)) == NULL) {
6450 6450 /*
6451 6451 * Problem is solved.
6452 6452 */
6453 6453 break;
6454 6454 }
6455 6455 if (zone->zone_uniqid != uniqid) {
6456 6456 /*
6457 6457 * zoneid recycled
6458 6458 */
6459 6459 zone_rele(zone);
6460 6460 break;
6461 6461 }
6462 6462 /*
6463 6463 * We could zone_status_timedwait(), but there doesn't seem to
6464 6464 * be much point in doing that (plus, it would mean that
6465 6465 * zone_free() isn't called until this thread exits).
6466 6466 */
6467 6467 zone_rele(zone);
6468 6468 delay(hz);
6469 6469 darg = save_arg;
6470 6470 }
6471 6471 out:
6472 6472 if (door != NULL) {
6473 6473 zone_release_door(&door);
6474 6474 }
6475 6475 kmem_free(zone_name, zone_namelen);
6476 6476 thread_exit();
6477 6477 }
6478 6478
6479 6479 /*
6480 6480 * Entry point for uadmin() to tell the zone to go away or reboot. Analog to
6481 6481 * kadmin(). The caller is a process in the zone.
6482 6482 *
6483 6483 * In order to shutdown the zone, we will hand off control to zoneadmd
6484 6484 * (running in the global zone) via a door. We do a half-hearted job at
6485 6485 * killing all processes in the zone, create a kernel thread to contact
6486 6486 * zoneadmd, and make note of the "uniqid" of the zone. The uniqid is
6487 6487 * a form of generation number used to let zoneadmd (as well as
6488 6488 * zone_destroy()) know exactly which zone they're re talking about.
6489 6489 */
6490 6490 int
6491 6491 zone_kadmin(int cmd, int fcn, const char *mdep, cred_t *credp)
6492 6492 {
6493 6493 struct zarg *zargp;
6494 6494 zone_cmd_t zcmd;
6495 6495 zone_t *zone;
6496 6496
6497 6497 zone = curproc->p_zone;
6498 6498 ASSERT(getzoneid() != GLOBAL_ZONEID);
6499 6499
6500 6500 switch (cmd) {
6501 6501 case A_SHUTDOWN:
6502 6502 switch (fcn) {
6503 6503 case AD_HALT:
6504 6504 case AD_POWEROFF:
6505 6505 zcmd = Z_HALT;
6506 6506 break;
6507 6507 case AD_BOOT:
6508 6508 zcmd = Z_REBOOT;
6509 6509 break;
6510 6510 case AD_IBOOT:
6511 6511 case AD_SBOOT:
6512 6512 case AD_SIBOOT:
6513 6513 case AD_NOSYNC:
6514 6514 return (ENOTSUP);
6515 6515 default:
6516 6516 return (EINVAL);
6517 6517 }
6518 6518 break;
6519 6519 case A_REBOOT:
6520 6520 zcmd = Z_REBOOT;
6521 6521 break;
6522 6522 case A_FTRACE:
6523 6523 case A_REMOUNT:
6524 6524 case A_FREEZE:
6525 6525 case A_DUMP:
6526 6526 case A_CONFIG:
6527 6527 return (ENOTSUP);
6528 6528 default:
6529 6529 ASSERT(cmd != A_SWAPCTL); /* handled by uadmin() */
6530 6530 return (EINVAL);
6531 6531 }
6532 6532
6533 6533 if (secpolicy_zone_admin(credp, B_FALSE))
6534 6534 return (EPERM);
6535 6535 mutex_enter(&zone_status_lock);
6536 6536
6537 6537 /*
6538 6538 * zone_status can't be ZONE_IS_EMPTY or higher since curproc
6539 6539 * is in the zone.
6540 6540 */
6541 6541 ASSERT(zone_status_get(zone) < ZONE_IS_EMPTY);
6542 6542 if (zone_status_get(zone) > ZONE_IS_RUNNING) {
6543 6543 /*
6544 6544 * This zone is already on its way down.
6545 6545 */
6546 6546 mutex_exit(&zone_status_lock);
6547 6547 return (0);
6548 6548 }
6549 6549 /*
6550 6550 * Prevent future zone_enter()s
6551 6551 */
6552 6552 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN);
6553 6553 mutex_exit(&zone_status_lock);
6554 6554
6555 6555 /*
6556 6556 * Kill everyone now and call zoneadmd later.
6557 6557 * zone_ki_call_zoneadmd() will do a more thorough job of this
6558 6558 * later.
6559 6559 */
6560 6560 killall(zone->zone_id);
6561 6561 /*
6562 6562 * Now, create the thread to contact zoneadmd and do the rest of the
6563 6563 * work. This thread can't be created in our zone otherwise
6564 6564 * zone_destroy() would deadlock.
6565 6565 */
6566 6566 zargp = kmem_zalloc(sizeof (*zargp), KM_SLEEP);
6567 6567 zargp->arg.cmd = zcmd;
6568 6568 zargp->arg.uniqid = zone->zone_uniqid;
6569 6569 zargp->zone = zone;
6570 6570 (void) strcpy(zargp->arg.locale, "C");
6571 6571 /* mdep was already copied in for us by uadmin */
6572 6572 if (mdep != NULL)
6573 6573 (void) strlcpy(zargp->arg.bootbuf, mdep,
6574 6574 sizeof (zargp->arg.bootbuf));
6575 6575 zone_hold(zone);
6576 6576
6577 6577 (void) thread_create(NULL, 0, zone_ki_call_zoneadmd, zargp, 0, &p0,
6578 6578 TS_RUN, minclsyspri);
6579 6579 exit(CLD_EXITED, 0);
6580 6580
6581 6581 return (EINVAL);
6582 6582 }
6583 6583
6584 6584 /*
6585 6585 * Entry point so kadmin(A_SHUTDOWN, ...) can set the global zone's
6586 6586 * status to ZONE_IS_SHUTTING_DOWN.
6587 6587 *
6588 6588 * This function also shuts down all running zones to ensure that they won't
6589 6589 * fork new processes.
6590 6590 */
6591 6591 void
6592 6592 zone_shutdown_global(void)
6593 6593 {
6594 6594 zone_t *current_zonep;
6595 6595
6596 6596 ASSERT(INGLOBALZONE(curproc));
6597 6597 mutex_enter(&zonehash_lock);
6598 6598 mutex_enter(&zone_status_lock);
6599 6599
6600 6600 /* Modify the global zone's status first. */
6601 6601 ASSERT(zone_status_get(global_zone) == ZONE_IS_RUNNING);
6602 6602 zone_status_set(global_zone, ZONE_IS_SHUTTING_DOWN);
6603 6603
6604 6604 /*
6605 6605 * Now change the states of all running zones to ZONE_IS_SHUTTING_DOWN.
6606 6606 * We don't mark all zones with ZONE_IS_SHUTTING_DOWN because doing so
6607 6607 * could cause assertions to fail (e.g., assertions about a zone's
6608 6608 * state during initialization, readying, or booting) or produce races.
6609 6609 * We'll let threads continue to initialize and ready new zones: they'll
6610 6610 * fail to boot the new zones when they see that the global zone is
6611 6611 * shutting down.
6612 6612 */
6613 6613 for (current_zonep = list_head(&zone_active); current_zonep != NULL;
6614 6614 current_zonep = list_next(&zone_active, current_zonep)) {
6615 6615 if (zone_status_get(current_zonep) == ZONE_IS_RUNNING)
6616 6616 zone_status_set(current_zonep, ZONE_IS_SHUTTING_DOWN);
6617 6617 }
6618 6618 mutex_exit(&zone_status_lock);
6619 6619 mutex_exit(&zonehash_lock);
6620 6620 }
6621 6621
6622 6622 /*
6623 6623 * Returns true if the named dataset is visible in the current zone.
6624 6624 * The 'write' parameter is set to 1 if the dataset is also writable.
6625 6625 */
6626 6626 int
6627 6627 zone_dataset_visible(const char *dataset, int *write)
6628 6628 {
6629 6629 static int zfstype = -1;
6630 6630 zone_dataset_t *zd;
6631 6631 size_t len;
6632 6632 zone_t *zone = curproc->p_zone;
6633 6633 const char *name = NULL;
6634 6634 vfs_t *vfsp = NULL;
6635 6635
6636 6636 if (dataset[0] == '\0')
6637 6637 return (0);
6638 6638
6639 6639 /*
6640 6640 * Walk the list once, looking for datasets which match exactly, or
6641 6641 * specify a dataset underneath an exported dataset. If found, return
6642 6642 * true and note that it is writable.
6643 6643 */
6644 6644 for (zd = list_head(&zone->zone_datasets); zd != NULL;
6645 6645 zd = list_next(&zone->zone_datasets, zd)) {
6646 6646
6647 6647 len = strlen(zd->zd_dataset);
6648 6648 if (strlen(dataset) >= len &&
6649 6649 bcmp(dataset, zd->zd_dataset, len) == 0 &&
6650 6650 (dataset[len] == '\0' || dataset[len] == '/' ||
6651 6651 dataset[len] == '@')) {
6652 6652 if (write)
6653 6653 *write = 1;
6654 6654 return (1);
6655 6655 }
6656 6656 }
6657 6657
6658 6658 /*
6659 6659 * Walk the list a second time, searching for datasets which are parents
6660 6660 * of exported datasets. These should be visible, but read-only.
6661 6661 *
6662 6662 * Note that we also have to support forms such as 'pool/dataset/', with
6663 6663 * a trailing slash.
6664 6664 */
6665 6665 for (zd = list_head(&zone->zone_datasets); zd != NULL;
6666 6666 zd = list_next(&zone->zone_datasets, zd)) {
6667 6667
6668 6668 len = strlen(dataset);
6669 6669 if (dataset[len - 1] == '/')
6670 6670 len--; /* Ignore trailing slash */
6671 6671 if (len < strlen(zd->zd_dataset) &&
6672 6672 bcmp(dataset, zd->zd_dataset, len) == 0 &&
6673 6673 zd->zd_dataset[len] == '/') {
6674 6674 if (write)
6675 6675 *write = 0;
6676 6676 return (1);
6677 6677 }
6678 6678 }
6679 6679
6680 6680 /*
6681 6681 * We reach here if the given dataset is not found in the zone_dataset
6682 6682 * list. Check if this dataset was added as a filesystem (ie. "add fs")
6683 6683 * instead of delegation. For this we search for the dataset in the
6684 6684 * zone_vfslist of this zone. If found, return true and note that it is
6685 6685 * not writable.
6686 6686 */
6687 6687
6688 6688 /*
6689 6689 * Initialize zfstype if it is not initialized yet.
6690 6690 */
6691 6691 if (zfstype == -1) {
6692 6692 struct vfssw *vswp = vfs_getvfssw("zfs");
6693 6693 zfstype = vswp - vfssw;
6694 6694 vfs_unrefvfssw(vswp);
6695 6695 }
6696 6696
6697 6697 vfs_list_read_lock();
6698 6698 vfsp = zone->zone_vfslist;
6699 6699 do {
6700 6700 ASSERT(vfsp);
6701 6701 if (vfsp->vfs_fstype == zfstype) {
6702 6702 name = refstr_value(vfsp->vfs_resource);
6703 6703
6704 6704 /*
6705 6705 * Check if we have an exact match.
6706 6706 */
6707 6707 if (strcmp(dataset, name) == 0) {
6708 6708 vfs_list_unlock();
6709 6709 if (write)
6710 6710 *write = 0;
6711 6711 return (1);
6712 6712 }
6713 6713 /*
6714 6714 * We need to check if we are looking for parents of
6715 6715 * a dataset. These should be visible, but read-only.
6716 6716 */
6717 6717 len = strlen(dataset);
6718 6718 if (dataset[len - 1] == '/')
6719 6719 len--;
6720 6720
6721 6721 if (len < strlen(name) &&
6722 6722 bcmp(dataset, name, len) == 0 && name[len] == '/') {
6723 6723 vfs_list_unlock();
6724 6724 if (write)
6725 6725 *write = 0;
6726 6726 return (1);
6727 6727 }
6728 6728 }
6729 6729 vfsp = vfsp->vfs_zone_next;
6730 6730 } while (vfsp != zone->zone_vfslist);
6731 6731
6732 6732 vfs_list_unlock();
6733 6733 return (0);
6734 6734 }
6735 6735
6736 6736 /*
6737 6737 * zone_find_by_any_path() -
6738 6738 *
6739 6739 * kernel-private routine similar to zone_find_by_path(), but which
6740 6740 * effectively compares against zone paths rather than zonerootpath
6741 6741 * (i.e., the last component of zonerootpaths, which should be "root/",
6742 6742 * are not compared.) This is done in order to accurately identify all
6743 6743 * paths, whether zone-visible or not, including those which are parallel
6744 6744 * to /root/, such as /dev/, /home/, etc...
6745 6745 *
6746 6746 * If the specified path does not fall under any zone path then global
6747 6747 * zone is returned.
6748 6748 *
6749 6749 * The treat_abs parameter indicates whether the path should be treated as
6750 6750 * an absolute path although it does not begin with "/". (This supports
6751 6751 * nfs mount syntax such as host:any/path.)
6752 6752 *
6753 6753 * The caller is responsible for zone_rele of the returned zone.
6754 6754 */
6755 6755 zone_t *
6756 6756 zone_find_by_any_path(const char *path, boolean_t treat_abs)
6757 6757 {
6758 6758 zone_t *zone;
6759 6759 int path_offset = 0;
6760 6760
6761 6761 if (path == NULL) {
6762 6762 zone_hold(global_zone);
6763 6763 return (global_zone);
6764 6764 }
6765 6765
6766 6766 if (*path != '/') {
6767 6767 ASSERT(treat_abs);
6768 6768 path_offset = 1;
6769 6769 }
6770 6770
6771 6771 mutex_enter(&zonehash_lock);
6772 6772 for (zone = list_head(&zone_active); zone != NULL;
6773 6773 zone = list_next(&zone_active, zone)) {
6774 6774 char *c;
6775 6775 size_t pathlen;
6776 6776 char *rootpath_start;
6777 6777
6778 6778 if (zone == global_zone) /* skip global zone */
6779 6779 continue;
6780 6780
6781 6781 /* scan backwards to find start of last component */
6782 6782 c = zone->zone_rootpath + zone->zone_rootpathlen - 2;
6783 6783 do {
6784 6784 c--;
6785 6785 } while (*c != '/');
6786 6786
6787 6787 pathlen = c - zone->zone_rootpath + 1 - path_offset;
6788 6788 rootpath_start = (zone->zone_rootpath + path_offset);
6789 6789 if (strncmp(path, rootpath_start, pathlen) == 0)
6790 6790 break;
6791 6791 }
6792 6792 if (zone == NULL)
6793 6793 zone = global_zone;
6794 6794 zone_hold(zone);
6795 6795 mutex_exit(&zonehash_lock);
6796 6796 return (zone);
6797 6797 }
6798 6798
6799 6799 /*
6800 6800 * Finds a zone_dl_t with the given linkid in the given zone. Returns the
6801 6801 * zone_dl_t pointer if found, and NULL otherwise.
6802 6802 */
6803 6803 static zone_dl_t *
6804 6804 zone_find_dl(zone_t *zone, datalink_id_t linkid)
6805 6805 {
6806 6806 zone_dl_t *zdl;
6807 6807
6808 6808 ASSERT(mutex_owned(&zone->zone_lock));
6809 6809 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL;
6810 6810 zdl = list_next(&zone->zone_dl_list, zdl)) {
6811 6811 if (zdl->zdl_id == linkid)
6812 6812 break;
6813 6813 }
6814 6814 return (zdl);
6815 6815 }
6816 6816
6817 6817 static boolean_t
6818 6818 zone_dl_exists(zone_t *zone, datalink_id_t linkid)
6819 6819 {
6820 6820 boolean_t exists;
6821 6821
6822 6822 mutex_enter(&zone->zone_lock);
6823 6823 exists = (zone_find_dl(zone, linkid) != NULL);
6824 6824 mutex_exit(&zone->zone_lock);
6825 6825 return (exists);
6826 6826 }
6827 6827
6828 6828 /*
6829 6829 * Add an data link name for the zone.
6830 6830 */
6831 6831 static int
6832 6832 zone_add_datalink(zoneid_t zoneid, datalink_id_t linkid)
6833 6833 {
6834 6834 zone_dl_t *zdl;
6835 6835 zone_t *zone;
6836 6836 zone_t *thiszone;
6837 6837
6838 6838 if ((thiszone = zone_find_by_id(zoneid)) == NULL)
6839 6839 return (set_errno(ENXIO));
6840 6840
6841 6841 /* Verify that the datalink ID doesn't already belong to a zone. */
6842 6842 mutex_enter(&zonehash_lock);
6843 6843 for (zone = list_head(&zone_active); zone != NULL;
6844 6844 zone = list_next(&zone_active, zone)) {
6845 6845 if (zone_dl_exists(zone, linkid)) {
6846 6846 mutex_exit(&zonehash_lock);
6847 6847 zone_rele(thiszone);
6848 6848 return (set_errno((zone == thiszone) ? EEXIST : EPERM));
6849 6849 }
6850 6850 }
6851 6851
6852 6852 zdl = kmem_zalloc(sizeof (*zdl), KM_SLEEP);
6853 6853 zdl->zdl_id = linkid;
6854 6854 zdl->zdl_net = NULL;
6855 6855 mutex_enter(&thiszone->zone_lock);
6856 6856 list_insert_head(&thiszone->zone_dl_list, zdl);
6857 6857 mutex_exit(&thiszone->zone_lock);
6858 6858 mutex_exit(&zonehash_lock);
6859 6859 zone_rele(thiszone);
6860 6860 return (0);
6861 6861 }
6862 6862
6863 6863 static int
6864 6864 zone_remove_datalink(zoneid_t zoneid, datalink_id_t linkid)
6865 6865 {
6866 6866 zone_dl_t *zdl;
6867 6867 zone_t *zone;
6868 6868 int err = 0;
6869 6869
6870 6870 if ((zone = zone_find_by_id(zoneid)) == NULL)
6871 6871 return (set_errno(EINVAL));
6872 6872
6873 6873 mutex_enter(&zone->zone_lock);
6874 6874 if ((zdl = zone_find_dl(zone, linkid)) == NULL) {
6875 6875 err = ENXIO;
6876 6876 } else {
6877 6877 list_remove(&zone->zone_dl_list, zdl);
6878 6878 if (zdl->zdl_net != NULL)
6879 6879 nvlist_free(zdl->zdl_net);
6880 6880 kmem_free(zdl, sizeof (zone_dl_t));
6881 6881 }
6882 6882 mutex_exit(&zone->zone_lock);
6883 6883 zone_rele(zone);
6884 6884 return (err == 0 ? 0 : set_errno(err));
6885 6885 }
6886 6886
6887 6887 /*
6888 6888 * Using the zoneidp as ALL_ZONES, we can lookup which zone has been assigned
6889 6889 * the linkid. Otherwise we just check if the specified zoneidp has been
6890 6890 * assigned the supplied linkid.
6891 6891 */
6892 6892 int
6893 6893 zone_check_datalink(zoneid_t *zoneidp, datalink_id_t linkid)
6894 6894 {
6895 6895 zone_t *zone;
6896 6896 int err = ENXIO;
6897 6897
6898 6898 if (*zoneidp != ALL_ZONES) {
6899 6899 if ((zone = zone_find_by_id(*zoneidp)) != NULL) {
6900 6900 if (zone_dl_exists(zone, linkid))
6901 6901 err = 0;
6902 6902 zone_rele(zone);
6903 6903 }
6904 6904 return (err);
6905 6905 }
6906 6906
6907 6907 mutex_enter(&zonehash_lock);
6908 6908 for (zone = list_head(&zone_active); zone != NULL;
6909 6909 zone = list_next(&zone_active, zone)) {
6910 6910 if (zone_dl_exists(zone, linkid)) {
6911 6911 *zoneidp = zone->zone_id;
6912 6912 err = 0;
6913 6913 break;
6914 6914 }
6915 6915 }
6916 6916 mutex_exit(&zonehash_lock);
6917 6917 return (err);
6918 6918 }
6919 6919
6920 6920 /*
6921 6921 * Get the list of datalink IDs assigned to a zone.
6922 6922 *
6923 6923 * On input, *nump is the number of datalink IDs that can fit in the supplied
6924 6924 * idarray. Upon return, *nump is either set to the number of datalink IDs
6925 6925 * that were placed in the array if the array was large enough, or to the
6926 6926 * number of datalink IDs that the function needs to place in the array if the
6927 6927 * array is too small.
6928 6928 */
6929 6929 static int
6930 6930 zone_list_datalink(zoneid_t zoneid, int *nump, datalink_id_t *idarray)
6931 6931 {
6932 6932 uint_t num, dlcount;
6933 6933 zone_t *zone;
6934 6934 zone_dl_t *zdl;
6935 6935 datalink_id_t *idptr = idarray;
6936 6936
6937 6937 if (copyin(nump, &dlcount, sizeof (dlcount)) != 0)
6938 6938 return (set_errno(EFAULT));
6939 6939 if ((zone = zone_find_by_id(zoneid)) == NULL)
6940 6940 return (set_errno(ENXIO));
6941 6941
6942 6942 num = 0;
6943 6943 mutex_enter(&zone->zone_lock);
6944 6944 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL;
6945 6945 zdl = list_next(&zone->zone_dl_list, zdl)) {
6946 6946 /*
6947 6947 * If the list is bigger than what the caller supplied, just
6948 6948 * count, don't do copyout.
6949 6949 */
6950 6950 if (++num > dlcount)
6951 6951 continue;
6952 6952 if (copyout(&zdl->zdl_id, idptr, sizeof (*idptr)) != 0) {
6953 6953 mutex_exit(&zone->zone_lock);
6954 6954 zone_rele(zone);
6955 6955 return (set_errno(EFAULT));
6956 6956 }
6957 6957 idptr++;
6958 6958 }
6959 6959 mutex_exit(&zone->zone_lock);
6960 6960 zone_rele(zone);
6961 6961
6962 6962 /* Increased or decreased, caller should be notified. */
6963 6963 if (num != dlcount) {
6964 6964 if (copyout(&num, nump, sizeof (num)) != 0)
6965 6965 return (set_errno(EFAULT));
6966 6966 }
6967 6967 return (0);
6968 6968 }
6969 6969
6970 6970 /*
6971 6971 * Public interface for looking up a zone by zoneid. It's a customized version
6972 6972 * for netstack_zone_create(). It can only be called from the zsd create
6973 6973 * callbacks, since it doesn't have reference on the zone structure hence if
6974 6974 * it is called elsewhere the zone could disappear after the zonehash_lock
6975 6975 * is dropped.
6976 6976 *
6977 6977 * Furthermore it
6978 6978 * 1. Doesn't check the status of the zone.
6979 6979 * 2. It will be called even before zone_init is called, in that case the
6980 6980 * address of zone0 is returned directly, and netstack_zone_create()
6981 6981 * will only assign a value to zone0.zone_netstack, won't break anything.
6982 6982 * 3. Returns without the zone being held.
6983 6983 */
6984 6984 zone_t *
6985 6985 zone_find_by_id_nolock(zoneid_t zoneid)
6986 6986 {
6987 6987 zone_t *zone;
6988 6988
6989 6989 mutex_enter(&zonehash_lock);
6990 6990 if (zonehashbyid == NULL)
6991 6991 zone = &zone0;
6992 6992 else
6993 6993 zone = zone_find_all_by_id(zoneid);
6994 6994 mutex_exit(&zonehash_lock);
6995 6995 return (zone);
6996 6996 }
6997 6997
6998 6998 /*
6999 6999 * Walk the datalinks for a given zone
7000 7000 */
7001 7001 int
7002 7002 zone_datalink_walk(zoneid_t zoneid, int (*cb)(datalink_id_t, void *),
7003 7003 void *data)
7004 7004 {
7005 7005 zone_t *zone;
7006 7006 zone_dl_t *zdl;
7007 7007 datalink_id_t *idarray;
7008 7008 uint_t idcount = 0;
7009 7009 int i, ret = 0;
7010 7010
7011 7011 if ((zone = zone_find_by_id(zoneid)) == NULL)
7012 7012 return (ENOENT);
7013 7013
7014 7014 /*
7015 7015 * We first build an array of linkid's so that we can walk these and
7016 7016 * execute the callback with the zone_lock dropped.
7017 7017 */
7018 7018 mutex_enter(&zone->zone_lock);
7019 7019 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL;
7020 7020 zdl = list_next(&zone->zone_dl_list, zdl)) {
7021 7021 idcount++;
7022 7022 }
7023 7023
7024 7024 if (idcount == 0) {
7025 7025 mutex_exit(&zone->zone_lock);
7026 7026 zone_rele(zone);
7027 7027 return (0);
7028 7028 }
7029 7029
7030 7030 idarray = kmem_alloc(sizeof (datalink_id_t) * idcount, KM_NOSLEEP);
7031 7031 if (idarray == NULL) {
7032 7032 mutex_exit(&zone->zone_lock);
7033 7033 zone_rele(zone);
7034 7034 return (ENOMEM);
7035 7035 }
7036 7036
7037 7037 for (i = 0, zdl = list_head(&zone->zone_dl_list); zdl != NULL;
7038 7038 i++, zdl = list_next(&zone->zone_dl_list, zdl)) {
7039 7039 idarray[i] = zdl->zdl_id;
7040 7040 }
7041 7041
7042 7042 mutex_exit(&zone->zone_lock);
7043 7043
7044 7044 for (i = 0; i < idcount && ret == 0; i++) {
7045 7045 if ((ret = (*cb)(idarray[i], data)) != 0)
7046 7046 break;
7047 7047 }
7048 7048
7049 7049 zone_rele(zone);
7050 7050 kmem_free(idarray, sizeof (datalink_id_t) * idcount);
7051 7051 return (ret);
7052 7052 }
7053 7053
7054 7054 static char *
7055 7055 zone_net_type2name(int type)
7056 7056 {
7057 7057 switch (type) {
7058 7058 case ZONE_NETWORK_ADDRESS:
7059 7059 return (ZONE_NET_ADDRNAME);
7060 7060 case ZONE_NETWORK_DEFROUTER:
7061 7061 return (ZONE_NET_RTRNAME);
7062 7062 default:
7063 7063 return (NULL);
7064 7064 }
7065 7065 }
7066 7066
7067 7067 static int
7068 7068 zone_set_network(zoneid_t zoneid, zone_net_data_t *znbuf)
7069 7069 {
7070 7070 zone_t *zone;
7071 7071 zone_dl_t *zdl;
7072 7072 nvlist_t *nvl;
7073 7073 int err = 0;
7074 7074 uint8_t *new = NULL;
7075 7075 char *nvname;
7076 7076 int bufsize;
7077 7077 datalink_id_t linkid = znbuf->zn_linkid;
7078 7078
7079 7079 if (secpolicy_zone_config(CRED()) != 0)
7080 7080 return (set_errno(EPERM));
7081 7081
7082 7082 if (zoneid == GLOBAL_ZONEID)
7083 7083 return (set_errno(EINVAL));
7084 7084
7085 7085 nvname = zone_net_type2name(znbuf->zn_type);
7086 7086 bufsize = znbuf->zn_len;
7087 7087 new = znbuf->zn_val;
7088 7088 if (nvname == NULL)
7089 7089 return (set_errno(EINVAL));
7090 7090
7091 7091 if ((zone = zone_find_by_id(zoneid)) == NULL) {
7092 7092 return (set_errno(EINVAL));
7093 7093 }
7094 7094
7095 7095 mutex_enter(&zone->zone_lock);
7096 7096 if ((zdl = zone_find_dl(zone, linkid)) == NULL) {
7097 7097 err = ENXIO;
7098 7098 goto done;
7099 7099 }
7100 7100 if ((nvl = zdl->zdl_net) == NULL) {
7101 7101 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP)) {
7102 7102 err = ENOMEM;
7103 7103 goto done;
7104 7104 } else {
7105 7105 zdl->zdl_net = nvl;
7106 7106 }
7107 7107 }
7108 7108 if (nvlist_exists(nvl, nvname)) {
7109 7109 err = EINVAL;
7110 7110 goto done;
7111 7111 }
7112 7112 err = nvlist_add_uint8_array(nvl, nvname, new, bufsize);
7113 7113 ASSERT(err == 0);
7114 7114 done:
7115 7115 mutex_exit(&zone->zone_lock);
7116 7116 zone_rele(zone);
7117 7117 if (err != 0)
7118 7118 return (set_errno(err));
7119 7119 else
7120 7120 return (0);
7121 7121 }
7122 7122
7123 7123 static int
7124 7124 zone_get_network(zoneid_t zoneid, zone_net_data_t *znbuf)
7125 7125 {
7126 7126 zone_t *zone;
7127 7127 zone_dl_t *zdl;
7128 7128 nvlist_t *nvl;
7129 7129 uint8_t *ptr;
7130 7130 uint_t psize;
7131 7131 int err = 0;
7132 7132 char *nvname;
7133 7133 int bufsize;
7134 7134 void *buf;
7135 7135 datalink_id_t linkid = znbuf->zn_linkid;
7136 7136
7137 7137 if (zoneid == GLOBAL_ZONEID)
7138 7138 return (set_errno(EINVAL));
7139 7139
7140 7140 nvname = zone_net_type2name(znbuf->zn_type);
7141 7141 bufsize = znbuf->zn_len;
7142 7142 buf = znbuf->zn_val;
7143 7143
7144 7144 if (nvname == NULL)
7145 7145 return (set_errno(EINVAL));
7146 7146 if ((zone = zone_find_by_id(zoneid)) == NULL)
7147 7147 return (set_errno(EINVAL));
7148 7148
7149 7149 mutex_enter(&zone->zone_lock);
7150 7150 if ((zdl = zone_find_dl(zone, linkid)) == NULL) {
7151 7151 err = ENXIO;
7152 7152 goto done;
7153 7153 }
7154 7154 if ((nvl = zdl->zdl_net) == NULL || !nvlist_exists(nvl, nvname)) {
7155 7155 err = ENOENT;
7156 7156 goto done;
7157 7157 }
7158 7158 err = nvlist_lookup_uint8_array(nvl, nvname, &ptr, &psize);
7159 7159 ASSERT(err == 0);
7160 7160
7161 7161 if (psize > bufsize) {
7162 7162 err = ENOBUFS;
7163 7163 goto done;
7164 7164 }
7165 7165 znbuf->zn_len = psize;
7166 7166 bcopy(ptr, buf, psize);
7167 7167 done:
7168 7168 mutex_exit(&zone->zone_lock);
7169 7169 zone_rele(zone);
7170 7170 if (err != 0)
7171 7171 return (set_errno(err));
7172 7172 else
7173 7173 return (0);
7174 7174 }
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