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7029 want per-process exploit mitigation features (secflags)
7030 want basic address space layout randomization (aslr)
7031 noexec_user_stack should be a secflag
7032 want a means to forbid mappings around NULL.
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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 2015, 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
1821 1821 static int
1822 1822 zone_mcap_kstat_update(kstat_t *ksp, int rw)
1823 1823 {
1824 1824 zone_t *zone = ksp->ks_private;
1825 1825 zone_mcap_kstat_t *zmp = ksp->ks_data;
1826 1826
1827 1827 if (rw == KSTAT_WRITE)
1828 1828 return (EACCES);
1829 1829
1830 1830 zmp->zm_pgpgin.value.ui64 = zone->zone_pgpgin;
1831 1831 zmp->zm_anonpgin.value.ui64 = zone->zone_anonpgin;
1832 1832 zmp->zm_execpgin.value.ui64 = zone->zone_execpgin;
1833 1833 zmp->zm_fspgin.value.ui64 = zone->zone_fspgin;
1834 1834 zmp->zm_anon_alloc_fail.value.ui64 = zone->zone_anon_alloc_fail;
1835 1835
1836 1836 return (0);
1837 1837 }
1838 1838
1839 1839 static kstat_t *
1840 1840 zone_mcap_kstat_create(zone_t *zone)
1841 1841 {
1842 1842 kstat_t *ksp;
1843 1843 zone_mcap_kstat_t *zmp;
1844 1844
1845 1845 if ((ksp = kstat_create_zone("memory_cap", zone->zone_id,
1846 1846 zone->zone_name, "zone_memory_cap", KSTAT_TYPE_NAMED,
1847 1847 sizeof (zone_mcap_kstat_t) / sizeof (kstat_named_t),
1848 1848 KSTAT_FLAG_VIRTUAL, zone->zone_id)) == NULL)
1849 1849 return (NULL);
1850 1850
1851 1851 if (zone->zone_id != GLOBAL_ZONEID)
1852 1852 kstat_zone_add(ksp, GLOBAL_ZONEID);
1853 1853
1854 1854 zmp = ksp->ks_data = kmem_zalloc(sizeof (zone_mcap_kstat_t), KM_SLEEP);
1855 1855 ksp->ks_data_size += strlen(zone->zone_name) + 1;
1856 1856 ksp->ks_lock = &zone->zone_mcap_lock;
1857 1857 zone->zone_mcap_stats = zmp;
1858 1858
1859 1859 /* The kstat "name" field is not large enough for a full zonename */
1860 1860 kstat_named_init(&zmp->zm_zonename, "zonename", KSTAT_DATA_STRING);
1861 1861 kstat_named_setstr(&zmp->zm_zonename, zone->zone_name);
1862 1862 kstat_named_init(&zmp->zm_pgpgin, "pgpgin", KSTAT_DATA_UINT64);
1863 1863 kstat_named_init(&zmp->zm_anonpgin, "anonpgin", KSTAT_DATA_UINT64);
1864 1864 kstat_named_init(&zmp->zm_execpgin, "execpgin", KSTAT_DATA_UINT64);
1865 1865 kstat_named_init(&zmp->zm_fspgin, "fspgin", KSTAT_DATA_UINT64);
1866 1866 kstat_named_init(&zmp->zm_anon_alloc_fail, "anon_alloc_fail",
1867 1867 KSTAT_DATA_UINT64);
1868 1868
1869 1869 ksp->ks_update = zone_mcap_kstat_update;
1870 1870 ksp->ks_private = zone;
1871 1871
1872 1872 kstat_install(ksp);
1873 1873 return (ksp);
1874 1874 }
1875 1875
1876 1876 static int
1877 1877 zone_misc_kstat_update(kstat_t *ksp, int rw)
1878 1878 {
1879 1879 zone_t *zone = ksp->ks_private;
1880 1880 zone_misc_kstat_t *zmp = ksp->ks_data;
1881 1881 hrtime_t tmp;
1882 1882
1883 1883 if (rw == KSTAT_WRITE)
1884 1884 return (EACCES);
1885 1885
1886 1886 tmp = zone->zone_utime;
1887 1887 scalehrtime(&tmp);
1888 1888 zmp->zm_utime.value.ui64 = tmp;
1889 1889 tmp = zone->zone_stime;
1890 1890 scalehrtime(&tmp);
1891 1891 zmp->zm_stime.value.ui64 = tmp;
1892 1892 tmp = zone->zone_wtime;
1893 1893 scalehrtime(&tmp);
1894 1894 zmp->zm_wtime.value.ui64 = tmp;
1895 1895
1896 1896 zmp->zm_avenrun1.value.ui32 = zone->zone_avenrun[0];
1897 1897 zmp->zm_avenrun5.value.ui32 = zone->zone_avenrun[1];
1898 1898 zmp->zm_avenrun15.value.ui32 = zone->zone_avenrun[2];
1899 1899
1900 1900 zmp->zm_ffcap.value.ui32 = zone->zone_ffcap;
1901 1901 zmp->zm_ffnoproc.value.ui32 = zone->zone_ffnoproc;
1902 1902 zmp->zm_ffnomem.value.ui32 = zone->zone_ffnomem;
1903 1903 zmp->zm_ffmisc.value.ui32 = zone->zone_ffmisc;
1904 1904
1905 1905 zmp->zm_nested_intp.value.ui32 = zone->zone_nested_intp;
1906 1906
1907 1907 zmp->zm_init_pid.value.ui32 = zone->zone_proc_initpid;
1908 1908 zmp->zm_boot_time.value.ui64 = (uint64_t)zone->zone_boot_time;
1909 1909
1910 1910 return (0);
1911 1911 }
1912 1912
1913 1913 static kstat_t *
1914 1914 zone_misc_kstat_create(zone_t *zone)
1915 1915 {
1916 1916 kstat_t *ksp;
1917 1917 zone_misc_kstat_t *zmp;
1918 1918
1919 1919 if ((ksp = kstat_create_zone("zones", zone->zone_id,
1920 1920 zone->zone_name, "zone_misc", KSTAT_TYPE_NAMED,
1921 1921 sizeof (zone_misc_kstat_t) / sizeof (kstat_named_t),
1922 1922 KSTAT_FLAG_VIRTUAL, zone->zone_id)) == NULL)
1923 1923 return (NULL);
1924 1924
1925 1925 if (zone->zone_id != GLOBAL_ZONEID)
1926 1926 kstat_zone_add(ksp, GLOBAL_ZONEID);
1927 1927
1928 1928 zmp = ksp->ks_data = kmem_zalloc(sizeof (zone_misc_kstat_t), KM_SLEEP);
1929 1929 ksp->ks_data_size += strlen(zone->zone_name) + 1;
1930 1930 ksp->ks_lock = &zone->zone_misc_lock;
1931 1931 zone->zone_misc_stats = zmp;
1932 1932
1933 1933 /* The kstat "name" field is not large enough for a full zonename */
1934 1934 kstat_named_init(&zmp->zm_zonename, "zonename", KSTAT_DATA_STRING);
1935 1935 kstat_named_setstr(&zmp->zm_zonename, zone->zone_name);
1936 1936 kstat_named_init(&zmp->zm_utime, "nsec_user", KSTAT_DATA_UINT64);
1937 1937 kstat_named_init(&zmp->zm_stime, "nsec_sys", KSTAT_DATA_UINT64);
1938 1938 kstat_named_init(&zmp->zm_wtime, "nsec_waitrq", KSTAT_DATA_UINT64);
1939 1939 kstat_named_init(&zmp->zm_avenrun1, "avenrun_1min", KSTAT_DATA_UINT32);
1940 1940 kstat_named_init(&zmp->zm_avenrun5, "avenrun_5min", KSTAT_DATA_UINT32);
1941 1941 kstat_named_init(&zmp->zm_avenrun15, "avenrun_15min",
1942 1942 KSTAT_DATA_UINT32);
1943 1943 kstat_named_init(&zmp->zm_ffcap, "forkfail_cap", KSTAT_DATA_UINT32);
1944 1944 kstat_named_init(&zmp->zm_ffnoproc, "forkfail_noproc",
1945 1945 KSTAT_DATA_UINT32);
1946 1946 kstat_named_init(&zmp->zm_ffnomem, "forkfail_nomem", KSTAT_DATA_UINT32);
1947 1947 kstat_named_init(&zmp->zm_ffmisc, "forkfail_misc", KSTAT_DATA_UINT32);
1948 1948 kstat_named_init(&zmp->zm_nested_intp, "nested_interp",
1949 1949 KSTAT_DATA_UINT32);
1950 1950 kstat_named_init(&zmp->zm_init_pid, "init_pid", KSTAT_DATA_UINT32);
1951 1951 kstat_named_init(&zmp->zm_boot_time, "boot_time", KSTAT_DATA_UINT64);
1952 1952
1953 1953 ksp->ks_update = zone_misc_kstat_update;
1954 1954 ksp->ks_private = zone;
1955 1955
1956 1956 kstat_install(ksp);
1957 1957 return (ksp);
1958 1958 }
1959 1959
1960 1960 static void
1961 1961 zone_kstat_create(zone_t *zone)
1962 1962 {
1963 1963 zone->zone_lockedmem_kstat = zone_kstat_create_common(zone,
1964 1964 "lockedmem", zone_lockedmem_kstat_update);
1965 1965 zone->zone_swapresv_kstat = zone_kstat_create_common(zone,
1966 1966 "swapresv", zone_swapresv_kstat_update);
1967 1967 zone->zone_nprocs_kstat = zone_kstat_create_common(zone,
1968 1968 "nprocs", zone_nprocs_kstat_update);
1969 1969
1970 1970 if ((zone->zone_mcap_ksp = zone_mcap_kstat_create(zone)) == NULL) {
1971 1971 zone->zone_mcap_stats = kmem_zalloc(
1972 1972 sizeof (zone_mcap_kstat_t), KM_SLEEP);
1973 1973 }
1974 1974
1975 1975 if ((zone->zone_misc_ksp = zone_misc_kstat_create(zone)) == NULL) {
1976 1976 zone->zone_misc_stats = kmem_zalloc(
1977 1977 sizeof (zone_misc_kstat_t), KM_SLEEP);
1978 1978 }
1979 1979 }
1980 1980
1981 1981 static void
1982 1982 zone_kstat_delete_common(kstat_t **pkstat, size_t datasz)
1983 1983 {
1984 1984 void *data;
1985 1985
1986 1986 if (*pkstat != NULL) {
1987 1987 data = (*pkstat)->ks_data;
1988 1988 kstat_delete(*pkstat);
1989 1989 kmem_free(data, datasz);
1990 1990 *pkstat = NULL;
1991 1991 }
1992 1992 }
1993 1993
1994 1994 static void
1995 1995 zone_kstat_delete(zone_t *zone)
1996 1996 {
1997 1997 zone_kstat_delete_common(&zone->zone_lockedmem_kstat,
1998 1998 sizeof (zone_kstat_t));
1999 1999 zone_kstat_delete_common(&zone->zone_swapresv_kstat,
2000 2000 sizeof (zone_kstat_t));
2001 2001 zone_kstat_delete_common(&zone->zone_nprocs_kstat,
2002 2002 sizeof (zone_kstat_t));
2003 2003 zone_kstat_delete_common(&zone->zone_mcap_ksp,
2004 2004 sizeof (zone_mcap_kstat_t));
2005 2005 zone_kstat_delete_common(&zone->zone_misc_ksp,
2006 2006 sizeof (zone_misc_kstat_t));
2007 2007 }
2008 2008
2009 2009 /*
2010 2010 * Called very early on in boot to initialize the ZSD list so that
2011 2011 * zone_key_create() can be called before zone_init(). It also initializes
2012 2012 * portions of zone0 which may be used before zone_init() is called. The
2013 2013 * variable "global_zone" will be set when zone0 is fully initialized by
2014 2014 * zone_init().
2015 2015 */
2016 2016 void
2017 2017 zone_zsd_init(void)
2018 2018 {
2019 2019 mutex_init(&zonehash_lock, NULL, MUTEX_DEFAULT, NULL);
2020 2020 mutex_init(&zsd_key_lock, NULL, MUTEX_DEFAULT, NULL);
2021 2021 list_create(&zsd_registered_keys, sizeof (struct zsd_entry),
2022 2022 offsetof(struct zsd_entry, zsd_linkage));
2023 2023 list_create(&zone_active, sizeof (zone_t),
2024 2024 offsetof(zone_t, zone_linkage));
2025 2025 list_create(&zone_deathrow, sizeof (zone_t),
2026 2026 offsetof(zone_t, zone_linkage));
2027 2027
2028 2028 mutex_init(&zone0.zone_lock, NULL, MUTEX_DEFAULT, NULL);
2029 2029 mutex_init(&zone0.zone_nlwps_lock, NULL, MUTEX_DEFAULT, NULL);
2030 2030 mutex_init(&zone0.zone_mem_lock, NULL, MUTEX_DEFAULT, NULL);
2031 2031 zone0.zone_shares = 1;
2032 2032 zone0.zone_nlwps = 0;
2033 2033 zone0.zone_nlwps_ctl = INT_MAX;
2034 2034 zone0.zone_nprocs = 0;
2035 2035 zone0.zone_nprocs_ctl = INT_MAX;
2036 2036 zone0.zone_locked_mem = 0;
2037 2037 zone0.zone_locked_mem_ctl = UINT64_MAX;
2038 2038 ASSERT(zone0.zone_max_swap == 0);
2039 2039 zone0.zone_max_swap_ctl = UINT64_MAX;
2040 2040 zone0.zone_max_lofi = 0;
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2041 2041 zone0.zone_max_lofi_ctl = UINT64_MAX;
2042 2042 zone0.zone_shmmax = 0;
2043 2043 zone0.zone_ipc.ipcq_shmmni = 0;
2044 2044 zone0.zone_ipc.ipcq_semmni = 0;
2045 2045 zone0.zone_ipc.ipcq_msgmni = 0;
2046 2046 zone0.zone_name = GLOBAL_ZONENAME;
2047 2047 zone0.zone_nodename = utsname.nodename;
2048 2048 zone0.zone_domain = srpc_domain;
2049 2049 zone0.zone_hostid = HW_INVALID_HOSTID;
2050 2050 zone0.zone_fs_allowed = NULL;
2051 + psecflags_default(&zone0.zone_secflags);
2051 2052 zone0.zone_ref = 1;
2052 2053 zone0.zone_id = GLOBAL_ZONEID;
2053 2054 zone0.zone_status = ZONE_IS_RUNNING;
2054 2055 zone0.zone_rootpath = "/";
2055 2056 zone0.zone_rootpathlen = 2;
2056 2057 zone0.zone_psetid = ZONE_PS_INVAL;
2057 2058 zone0.zone_ncpus = 0;
2058 2059 zone0.zone_ncpus_online = 0;
2059 2060 zone0.zone_proc_initpid = 1;
2060 2061 zone0.zone_initname = initname;
2061 2062 zone0.zone_lockedmem_kstat = NULL;
2062 2063 zone0.zone_swapresv_kstat = NULL;
2063 2064 zone0.zone_nprocs_kstat = NULL;
2064 2065
2065 2066 zone0.zone_stime = 0;
2066 2067 zone0.zone_utime = 0;
2067 2068 zone0.zone_wtime = 0;
2068 2069
2069 2070 list_create(&zone0.zone_ref_list, sizeof (zone_ref_t),
2070 2071 offsetof(zone_ref_t, zref_linkage));
2071 2072 list_create(&zone0.zone_zsd, sizeof (struct zsd_entry),
2072 2073 offsetof(struct zsd_entry, zsd_linkage));
2073 2074 list_insert_head(&zone_active, &zone0);
2074 2075
2075 2076 /*
2076 2077 * The root filesystem is not mounted yet, so zone_rootvp cannot be set
2077 2078 * to anything meaningful. It is assigned to be 'rootdir' in
2078 2079 * vfs_mountroot().
2079 2080 */
2080 2081 zone0.zone_rootvp = NULL;
2081 2082 zone0.zone_vfslist = NULL;
2082 2083 zone0.zone_bootargs = initargs;
2083 2084 zone0.zone_privset = kmem_alloc(sizeof (priv_set_t), KM_SLEEP);
2084 2085 /*
2085 2086 * The global zone has all privileges
2086 2087 */
2087 2088 priv_fillset(zone0.zone_privset);
2088 2089 /*
2089 2090 * Add p0 to the global zone
2090 2091 */
2091 2092 zone0.zone_zsched = &p0;
2092 2093 p0.p_zone = &zone0;
2093 2094 }
2094 2095
2095 2096 /*
2096 2097 * Compute a hash value based on the contents of the label and the DOI. The
2097 2098 * hash algorithm is somewhat arbitrary, but is based on the observation that
2098 2099 * humans will likely pick labels that differ by amounts that work out to be
2099 2100 * multiples of the number of hash chains, and thus stirring in some primes
2100 2101 * should help.
2101 2102 */
2102 2103 static uint_t
2103 2104 hash_bylabel(void *hdata, mod_hash_key_t key)
2104 2105 {
2105 2106 const ts_label_t *lab = (ts_label_t *)key;
2106 2107 const uint32_t *up, *ue;
2107 2108 uint_t hash;
2108 2109 int i;
2109 2110
2110 2111 _NOTE(ARGUNUSED(hdata));
2111 2112
2112 2113 hash = lab->tsl_doi + (lab->tsl_doi << 1);
2113 2114 /* we depend on alignment of label, but not representation */
2114 2115 up = (const uint32_t *)&lab->tsl_label;
2115 2116 ue = up + sizeof (lab->tsl_label) / sizeof (*up);
2116 2117 i = 1;
2117 2118 while (up < ue) {
2118 2119 /* using 2^n + 1, 1 <= n <= 16 as source of many primes */
2119 2120 hash += *up + (*up << ((i % 16) + 1));
2120 2121 up++;
2121 2122 i++;
2122 2123 }
2123 2124 return (hash);
2124 2125 }
2125 2126
2126 2127 /*
2127 2128 * All that mod_hash cares about here is zero (equal) versus non-zero (not
2128 2129 * equal). This may need to be changed if less than / greater than is ever
2129 2130 * needed.
2130 2131 */
2131 2132 static int
2132 2133 hash_labelkey_cmp(mod_hash_key_t key1, mod_hash_key_t key2)
2133 2134 {
2134 2135 ts_label_t *lab1 = (ts_label_t *)key1;
2135 2136 ts_label_t *lab2 = (ts_label_t *)key2;
2136 2137
2137 2138 return (label_equal(lab1, lab2) ? 0 : 1);
2138 2139 }
2139 2140
2140 2141 /*
2141 2142 * Called by main() to initialize the zones framework.
2142 2143 */
2143 2144 void
2144 2145 zone_init(void)
2145 2146 {
2146 2147 rctl_dict_entry_t *rde;
2147 2148 rctl_val_t *dval;
2148 2149 rctl_set_t *set;
2149 2150 rctl_alloc_gp_t *gp;
2150 2151 rctl_entity_p_t e;
2151 2152 int res;
2152 2153
2153 2154 ASSERT(curproc == &p0);
2154 2155
2155 2156 /*
2156 2157 * Create ID space for zone IDs. ID 0 is reserved for the
2157 2158 * global zone.
2158 2159 */
2159 2160 zoneid_space = id_space_create("zoneid_space", 1, MAX_ZONEID);
2160 2161
2161 2162 /*
2162 2163 * Initialize generic zone resource controls, if any.
2163 2164 */
2164 2165 rc_zone_cpu_shares = rctl_register("zone.cpu-shares",
2165 2166 RCENTITY_ZONE, RCTL_GLOBAL_SIGNAL_NEVER | RCTL_GLOBAL_DENY_NEVER |
2166 2167 RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT | RCTL_GLOBAL_SYSLOG_NEVER,
2167 2168 FSS_MAXSHARES, FSS_MAXSHARES, &zone_cpu_shares_ops);
2168 2169
2169 2170 rc_zone_cpu_cap = rctl_register("zone.cpu-cap",
2170 2171 RCENTITY_ZONE, RCTL_GLOBAL_SIGNAL_NEVER | RCTL_GLOBAL_DENY_ALWAYS |
2171 2172 RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT |RCTL_GLOBAL_SYSLOG_NEVER |
2172 2173 RCTL_GLOBAL_INFINITE,
2173 2174 MAXCAP, MAXCAP, &zone_cpu_cap_ops);
2174 2175
2175 2176 rc_zone_nlwps = rctl_register("zone.max-lwps", RCENTITY_ZONE,
2176 2177 RCTL_GLOBAL_NOACTION | RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT,
2177 2178 INT_MAX, INT_MAX, &zone_lwps_ops);
2178 2179
2179 2180 rc_zone_nprocs = rctl_register("zone.max-processes", RCENTITY_ZONE,
2180 2181 RCTL_GLOBAL_NOACTION | RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT,
2181 2182 INT_MAX, INT_MAX, &zone_procs_ops);
2182 2183
2183 2184 /*
2184 2185 * System V IPC resource controls
2185 2186 */
2186 2187 rc_zone_msgmni = rctl_register("zone.max-msg-ids",
2187 2188 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC |
2188 2189 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_msgmni_ops);
2189 2190
2190 2191 rc_zone_semmni = rctl_register("zone.max-sem-ids",
2191 2192 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC |
2192 2193 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_semmni_ops);
2193 2194
2194 2195 rc_zone_shmmni = rctl_register("zone.max-shm-ids",
2195 2196 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC |
2196 2197 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_shmmni_ops);
2197 2198
2198 2199 rc_zone_shmmax = rctl_register("zone.max-shm-memory",
2199 2200 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC |
2200 2201 RCTL_GLOBAL_BYTES, UINT64_MAX, UINT64_MAX, &zone_shmmax_ops);
2201 2202
2202 2203 /*
2203 2204 * Create a rctl_val with PRIVILEGED, NOACTION, value = 1. Then attach
2204 2205 * this at the head of the rctl_dict_entry for ``zone.cpu-shares''.
2205 2206 */
2206 2207 dval = kmem_cache_alloc(rctl_val_cache, KM_SLEEP);
2207 2208 bzero(dval, sizeof (rctl_val_t));
2208 2209 dval->rcv_value = 1;
2209 2210 dval->rcv_privilege = RCPRIV_PRIVILEGED;
2210 2211 dval->rcv_flagaction = RCTL_LOCAL_NOACTION;
2211 2212 dval->rcv_action_recip_pid = -1;
2212 2213
2213 2214 rde = rctl_dict_lookup("zone.cpu-shares");
2214 2215 (void) rctl_val_list_insert(&rde->rcd_default_value, dval);
2215 2216
2216 2217 rc_zone_locked_mem = rctl_register("zone.max-locked-memory",
2217 2218 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_BYTES |
2218 2219 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX,
2219 2220 &zone_locked_mem_ops);
2220 2221
2221 2222 rc_zone_max_swap = rctl_register("zone.max-swap",
2222 2223 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_BYTES |
2223 2224 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX,
2224 2225 &zone_max_swap_ops);
2225 2226
2226 2227 rc_zone_max_lofi = rctl_register("zone.max-lofi",
2227 2228 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT |
2228 2229 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX,
2229 2230 &zone_max_lofi_ops);
2230 2231
2231 2232 /*
2232 2233 * Initialize the ``global zone''.
2233 2234 */
2234 2235 set = rctl_set_create();
2235 2236 gp = rctl_set_init_prealloc(RCENTITY_ZONE);
2236 2237 mutex_enter(&p0.p_lock);
2237 2238 e.rcep_p.zone = &zone0;
2238 2239 e.rcep_t = RCENTITY_ZONE;
2239 2240 zone0.zone_rctls = rctl_set_init(RCENTITY_ZONE, &p0, &e, set,
2240 2241 gp);
2241 2242
2242 2243 zone0.zone_nlwps = p0.p_lwpcnt;
2243 2244 zone0.zone_nprocs = 1;
2244 2245 zone0.zone_ntasks = 1;
2245 2246 mutex_exit(&p0.p_lock);
2246 2247 zone0.zone_restart_init = B_TRUE;
2247 2248 zone0.zone_brand = &native_brand;
2248 2249 rctl_prealloc_destroy(gp);
2249 2250 /*
2250 2251 * pool_default hasn't been initialized yet, so we let pool_init()
2251 2252 * take care of making sure the global zone is in the default pool.
2252 2253 */
2253 2254
2254 2255 /*
2255 2256 * Initialize global zone kstats
2256 2257 */
2257 2258 zone_kstat_create(&zone0);
2258 2259
2259 2260 /*
2260 2261 * Initialize zone label.
2261 2262 * mlp are initialized when tnzonecfg is loaded.
2262 2263 */
2263 2264 zone0.zone_slabel = l_admin_low;
2264 2265 rw_init(&zone0.zone_mlps.mlpl_rwlock, NULL, RW_DEFAULT, NULL);
2265 2266 label_hold(l_admin_low);
2266 2267
2267 2268 /*
2268 2269 * Initialise the lock for the database structure used by mntfs.
2269 2270 */
2270 2271 rw_init(&zone0.zone_mntfs_db_lock, NULL, RW_DEFAULT, NULL);
2271 2272
2272 2273 mutex_enter(&zonehash_lock);
2273 2274 zone_uniqid(&zone0);
2274 2275 ASSERT(zone0.zone_uniqid == GLOBAL_ZONEUNIQID);
2275 2276
2276 2277 zonehashbyid = mod_hash_create_idhash("zone_by_id", zone_hash_size,
2277 2278 mod_hash_null_valdtor);
2278 2279 zonehashbyname = mod_hash_create_strhash("zone_by_name",
2279 2280 zone_hash_size, mod_hash_null_valdtor);
2280 2281 /*
2281 2282 * maintain zonehashbylabel only for labeled systems
2282 2283 */
2283 2284 if (is_system_labeled())
2284 2285 zonehashbylabel = mod_hash_create_extended("zone_by_label",
2285 2286 zone_hash_size, mod_hash_null_keydtor,
2286 2287 mod_hash_null_valdtor, hash_bylabel, NULL,
2287 2288 hash_labelkey_cmp, KM_SLEEP);
2288 2289 zonecount = 1;
2289 2290
2290 2291 (void) mod_hash_insert(zonehashbyid, (mod_hash_key_t)GLOBAL_ZONEID,
2291 2292 (mod_hash_val_t)&zone0);
2292 2293 (void) mod_hash_insert(zonehashbyname, (mod_hash_key_t)zone0.zone_name,
2293 2294 (mod_hash_val_t)&zone0);
2294 2295 if (is_system_labeled()) {
2295 2296 zone0.zone_flags |= ZF_HASHED_LABEL;
2296 2297 (void) mod_hash_insert(zonehashbylabel,
2297 2298 (mod_hash_key_t)zone0.zone_slabel, (mod_hash_val_t)&zone0);
2298 2299 }
2299 2300 mutex_exit(&zonehash_lock);
2300 2301
2301 2302 /*
2302 2303 * We avoid setting zone_kcred until now, since kcred is initialized
2303 2304 * sometime after zone_zsd_init() and before zone_init().
2304 2305 */
2305 2306 zone0.zone_kcred = kcred;
2306 2307 /*
2307 2308 * The global zone is fully initialized (except for zone_rootvp which
2308 2309 * will be set when the root filesystem is mounted).
2309 2310 */
2310 2311 global_zone = &zone0;
2311 2312
2312 2313 /*
2313 2314 * Setup an event channel to send zone status change notifications on
2314 2315 */
2315 2316 res = sysevent_evc_bind(ZONE_EVENT_CHANNEL, &zone_event_chan,
2316 2317 EVCH_CREAT);
2317 2318
2318 2319 if (res)
2319 2320 panic("Sysevent_evc_bind failed during zone setup.\n");
2320 2321
2321 2322 }
2322 2323
2323 2324 static void
2324 2325 zone_free(zone_t *zone)
2325 2326 {
2326 2327 ASSERT(zone != global_zone);
2327 2328 ASSERT(zone->zone_ntasks == 0);
2328 2329 ASSERT(zone->zone_nlwps == 0);
2329 2330 ASSERT(zone->zone_nprocs == 0);
2330 2331 ASSERT(zone->zone_cred_ref == 0);
2331 2332 ASSERT(zone->zone_kcred == NULL);
2332 2333 ASSERT(zone_status_get(zone) == ZONE_IS_DEAD ||
2333 2334 zone_status_get(zone) == ZONE_IS_UNINITIALIZED);
2334 2335 ASSERT(list_is_empty(&zone->zone_ref_list));
2335 2336
2336 2337 /*
2337 2338 * Remove any zone caps.
2338 2339 */
2339 2340 cpucaps_zone_remove(zone);
2340 2341
2341 2342 ASSERT(zone->zone_cpucap == NULL);
2342 2343
2343 2344 /* remove from deathrow list */
2344 2345 if (zone_status_get(zone) == ZONE_IS_DEAD) {
2345 2346 ASSERT(zone->zone_ref == 0);
2346 2347 mutex_enter(&zone_deathrow_lock);
2347 2348 list_remove(&zone_deathrow, zone);
2348 2349 mutex_exit(&zone_deathrow_lock);
2349 2350 }
2350 2351
2351 2352 list_destroy(&zone->zone_ref_list);
2352 2353 zone_free_zsd(zone);
2353 2354 zone_free_datasets(zone);
2354 2355 list_destroy(&zone->zone_dl_list);
2355 2356
2356 2357 if (zone->zone_rootvp != NULL)
2357 2358 VN_RELE(zone->zone_rootvp);
2358 2359 if (zone->zone_rootpath)
2359 2360 kmem_free(zone->zone_rootpath, zone->zone_rootpathlen);
2360 2361 if (zone->zone_name != NULL)
2361 2362 kmem_free(zone->zone_name, ZONENAME_MAX);
2362 2363 if (zone->zone_slabel != NULL)
2363 2364 label_rele(zone->zone_slabel);
2364 2365 if (zone->zone_nodename != NULL)
2365 2366 kmem_free(zone->zone_nodename, _SYS_NMLN);
2366 2367 if (zone->zone_domain != NULL)
2367 2368 kmem_free(zone->zone_domain, _SYS_NMLN);
2368 2369 if (zone->zone_privset != NULL)
2369 2370 kmem_free(zone->zone_privset, sizeof (priv_set_t));
2370 2371 if (zone->zone_rctls != NULL)
2371 2372 rctl_set_free(zone->zone_rctls);
2372 2373 if (zone->zone_bootargs != NULL)
2373 2374 strfree(zone->zone_bootargs);
2374 2375 if (zone->zone_initname != NULL)
2375 2376 strfree(zone->zone_initname);
2376 2377 if (zone->zone_fs_allowed != NULL)
2377 2378 strfree(zone->zone_fs_allowed);
2378 2379 if (zone->zone_pfexecd != NULL)
2379 2380 klpd_freelist(&zone->zone_pfexecd);
2380 2381 id_free(zoneid_space, zone->zone_id);
2381 2382 mutex_destroy(&zone->zone_lock);
2382 2383 cv_destroy(&zone->zone_cv);
2383 2384 rw_destroy(&zone->zone_mlps.mlpl_rwlock);
2384 2385 rw_destroy(&zone->zone_mntfs_db_lock);
2385 2386 kmem_free(zone, sizeof (zone_t));
2386 2387 }
2387 2388
2388 2389 /*
2389 2390 * See block comment at the top of this file for information about zone
2390 2391 * status values.
2391 2392 */
2392 2393 /*
2393 2394 * Convenience function for setting zone status.
2394 2395 */
2395 2396 static void
2396 2397 zone_status_set(zone_t *zone, zone_status_t status)
2397 2398 {
2398 2399
2399 2400 nvlist_t *nvl = NULL;
2400 2401 ASSERT(MUTEX_HELD(&zone_status_lock));
2401 2402 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE &&
2402 2403 status >= zone_status_get(zone));
2403 2404
2404 2405 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) ||
2405 2406 nvlist_add_string(nvl, ZONE_CB_NAME, zone->zone_name) ||
2406 2407 nvlist_add_string(nvl, ZONE_CB_NEWSTATE,
2407 2408 zone_status_table[status]) ||
2408 2409 nvlist_add_string(nvl, ZONE_CB_OLDSTATE,
2409 2410 zone_status_table[zone->zone_status]) ||
2410 2411 nvlist_add_int32(nvl, ZONE_CB_ZONEID, zone->zone_id) ||
2411 2412 nvlist_add_uint64(nvl, ZONE_CB_TIMESTAMP, (uint64_t)gethrtime()) ||
2412 2413 sysevent_evc_publish(zone_event_chan, ZONE_EVENT_STATUS_CLASS,
2413 2414 ZONE_EVENT_STATUS_SUBCLASS, "sun.com", "kernel", nvl, EVCH_SLEEP)) {
2414 2415 #ifdef DEBUG
2415 2416 (void) printf(
2416 2417 "Failed to allocate and send zone state change event.\n");
2417 2418 #endif
2418 2419 }
2419 2420 nvlist_free(nvl);
2420 2421
2421 2422 zone->zone_status = status;
2422 2423
2423 2424 cv_broadcast(&zone->zone_cv);
2424 2425 }
2425 2426
2426 2427 /*
2427 2428 * Public function to retrieve the zone status. The zone status may
2428 2429 * change after it is retrieved.
2429 2430 */
2430 2431 zone_status_t
2431 2432 zone_status_get(zone_t *zone)
2432 2433 {
2433 2434 return (zone->zone_status);
2434 2435 }
2435 2436
2436 2437 static int
2437 2438 zone_set_bootargs(zone_t *zone, const char *zone_bootargs)
2438 2439 {
2439 2440 char *buf = kmem_zalloc(BOOTARGS_MAX, KM_SLEEP);
2440 2441 int err = 0;
2441 2442
2442 2443 ASSERT(zone != global_zone);
2443 2444 if ((err = copyinstr(zone_bootargs, buf, BOOTARGS_MAX, NULL)) != 0)
2444 2445 goto done; /* EFAULT or ENAMETOOLONG */
2445 2446
2446 2447 if (zone->zone_bootargs != NULL)
2447 2448 strfree(zone->zone_bootargs);
2448 2449
2449 2450 zone->zone_bootargs = strdup(buf);
2450 2451
2451 2452 done:
2452 2453 kmem_free(buf, BOOTARGS_MAX);
2453 2454 return (err);
2454 2455 }
2455 2456
2456 2457 static int
2457 2458 zone_set_brand(zone_t *zone, const char *brand)
2458 2459 {
2459 2460 struct brand_attr *attrp;
2460 2461 brand_t *bp;
2461 2462
2462 2463 attrp = kmem_alloc(sizeof (struct brand_attr), KM_SLEEP);
2463 2464 if (copyin(brand, attrp, sizeof (struct brand_attr)) != 0) {
2464 2465 kmem_free(attrp, sizeof (struct brand_attr));
2465 2466 return (EFAULT);
2466 2467 }
2467 2468
2468 2469 bp = brand_register_zone(attrp);
2469 2470 kmem_free(attrp, sizeof (struct brand_attr));
2470 2471 if (bp == NULL)
2471 2472 return (EINVAL);
2472 2473
2473 2474 /*
2474 2475 * This is the only place where a zone can change it's brand.
2475 2476 * We already need to hold zone_status_lock to check the zone
2476 2477 * status, so we'll just use that lock to serialize zone
2477 2478 * branding requests as well.
2478 2479 */
2479 2480 mutex_enter(&zone_status_lock);
2480 2481
2481 2482 /* Re-Branding is not allowed and the zone can't be booted yet */
2482 2483 if ((ZONE_IS_BRANDED(zone)) ||
2483 2484 (zone_status_get(zone) >= ZONE_IS_BOOTING)) {
2484 2485 mutex_exit(&zone_status_lock);
2485 2486 brand_unregister_zone(bp);
2486 2487 return (EINVAL);
2487 2488 }
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2488 2489
2489 2490 /* set up the brand specific data */
2490 2491 zone->zone_brand = bp;
2491 2492 ZBROP(zone)->b_init_brand_data(zone);
2492 2493
2493 2494 mutex_exit(&zone_status_lock);
2494 2495 return (0);
2495 2496 }
2496 2497
2497 2498 static int
2499 +zone_set_secflags(zone_t *zone, const psecflags_t *zone_secflags)
2500 +{
2501 + int err = 0;
2502 + psecflags_t psf;
2503 +
2504 + ASSERT(zone != global_zone);
2505 +
2506 + if ((err = copyin(zone_secflags, &psf, sizeof (psf))) != 0)
2507 + return (err);
2508 +
2509 + if (zone_status_get(zone) > ZONE_IS_READY)
2510 + return (EINVAL);
2511 +
2512 + if (!psecflags_validate(&psf))
2513 + return (EINVAL);
2514 +
2515 + (void) memcpy(&zone->zone_secflags, &psf, sizeof (psf));
2516 +
2517 + /* Set security flags on the zone's zsched */
2518 + (void) memcpy(&zone->zone_zsched->p_secflags, &zone->zone_secflags,
2519 + sizeof (zone->zone_zsched->p_secflags));
2520 +
2521 + return (0);
2522 +}
2523 +
2524 +static int
2498 2525 zone_set_fs_allowed(zone_t *zone, const char *zone_fs_allowed)
2499 2526 {
2500 2527 char *buf = kmem_zalloc(ZONE_FS_ALLOWED_MAX, KM_SLEEP);
2501 2528 int err = 0;
2502 2529
2503 2530 ASSERT(zone != global_zone);
2504 2531 if ((err = copyinstr(zone_fs_allowed, buf,
2505 2532 ZONE_FS_ALLOWED_MAX, NULL)) != 0)
2506 2533 goto done;
2507 2534
2508 2535 if (zone->zone_fs_allowed != NULL)
2509 2536 strfree(zone->zone_fs_allowed);
2510 2537
2511 2538 zone->zone_fs_allowed = strdup(buf);
2512 2539
2513 2540 done:
2514 2541 kmem_free(buf, ZONE_FS_ALLOWED_MAX);
2515 2542 return (err);
2516 2543 }
2517 2544
2518 2545 static int
2519 2546 zone_set_initname(zone_t *zone, const char *zone_initname)
2520 2547 {
2521 2548 char initname[INITNAME_SZ];
2522 2549 size_t len;
2523 2550 int err = 0;
2524 2551
2525 2552 ASSERT(zone != global_zone);
2526 2553 if ((err = copyinstr(zone_initname, initname, INITNAME_SZ, &len)) != 0)
2527 2554 return (err); /* EFAULT or ENAMETOOLONG */
2528 2555
2529 2556 if (zone->zone_initname != NULL)
2530 2557 strfree(zone->zone_initname);
2531 2558
2532 2559 zone->zone_initname = kmem_alloc(strlen(initname) + 1, KM_SLEEP);
2533 2560 (void) strcpy(zone->zone_initname, initname);
2534 2561 return (0);
2535 2562 }
2536 2563
2537 2564 static int
2538 2565 zone_set_phys_mcap(zone_t *zone, const uint64_t *zone_mcap)
2539 2566 {
2540 2567 uint64_t mcap;
2541 2568 int err = 0;
2542 2569
2543 2570 if ((err = copyin(zone_mcap, &mcap, sizeof (uint64_t))) == 0)
2544 2571 zone->zone_phys_mcap = mcap;
2545 2572
2546 2573 return (err);
2547 2574 }
2548 2575
2549 2576 static int
2550 2577 zone_set_sched_class(zone_t *zone, const char *new_class)
2551 2578 {
2552 2579 char sched_class[PC_CLNMSZ];
2553 2580 id_t classid;
2554 2581 int err;
2555 2582
2556 2583 ASSERT(zone != global_zone);
2557 2584 if ((err = copyinstr(new_class, sched_class, PC_CLNMSZ, NULL)) != 0)
2558 2585 return (err); /* EFAULT or ENAMETOOLONG */
2559 2586
2560 2587 if (getcid(sched_class, &classid) != 0 || CLASS_KERNEL(classid))
2561 2588 return (set_errno(EINVAL));
2562 2589 zone->zone_defaultcid = classid;
2563 2590 ASSERT(zone->zone_defaultcid > 0 &&
2564 2591 zone->zone_defaultcid < loaded_classes);
2565 2592
2566 2593 return (0);
2567 2594 }
2568 2595
2569 2596 /*
2570 2597 * Block indefinitely waiting for (zone_status >= status)
2571 2598 */
2572 2599 void
2573 2600 zone_status_wait(zone_t *zone, zone_status_t status)
2574 2601 {
2575 2602 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2576 2603
2577 2604 mutex_enter(&zone_status_lock);
2578 2605 while (zone->zone_status < status) {
2579 2606 cv_wait(&zone->zone_cv, &zone_status_lock);
2580 2607 }
2581 2608 mutex_exit(&zone_status_lock);
2582 2609 }
2583 2610
2584 2611 /*
2585 2612 * Private CPR-safe version of zone_status_wait().
2586 2613 */
2587 2614 static void
2588 2615 zone_status_wait_cpr(zone_t *zone, zone_status_t status, char *str)
2589 2616 {
2590 2617 callb_cpr_t cprinfo;
2591 2618
2592 2619 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2593 2620
2594 2621 CALLB_CPR_INIT(&cprinfo, &zone_status_lock, callb_generic_cpr,
2595 2622 str);
2596 2623 mutex_enter(&zone_status_lock);
2597 2624 while (zone->zone_status < status) {
2598 2625 CALLB_CPR_SAFE_BEGIN(&cprinfo);
2599 2626 cv_wait(&zone->zone_cv, &zone_status_lock);
2600 2627 CALLB_CPR_SAFE_END(&cprinfo, &zone_status_lock);
2601 2628 }
2602 2629 /*
2603 2630 * zone_status_lock is implicitly released by the following.
2604 2631 */
2605 2632 CALLB_CPR_EXIT(&cprinfo);
2606 2633 }
2607 2634
2608 2635 /*
2609 2636 * Block until zone enters requested state or signal is received. Return (0)
2610 2637 * if signaled, non-zero otherwise.
2611 2638 */
2612 2639 int
2613 2640 zone_status_wait_sig(zone_t *zone, zone_status_t status)
2614 2641 {
2615 2642 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2616 2643
2617 2644 mutex_enter(&zone_status_lock);
2618 2645 while (zone->zone_status < status) {
2619 2646 if (!cv_wait_sig(&zone->zone_cv, &zone_status_lock)) {
2620 2647 mutex_exit(&zone_status_lock);
2621 2648 return (0);
2622 2649 }
2623 2650 }
2624 2651 mutex_exit(&zone_status_lock);
2625 2652 return (1);
2626 2653 }
2627 2654
2628 2655 /*
2629 2656 * Block until the zone enters the requested state or the timeout expires,
2630 2657 * whichever happens first. Return (-1) if operation timed out, time remaining
2631 2658 * otherwise.
2632 2659 */
2633 2660 clock_t
2634 2661 zone_status_timedwait(zone_t *zone, clock_t tim, zone_status_t status)
2635 2662 {
2636 2663 clock_t timeleft = 0;
2637 2664
2638 2665 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2639 2666
2640 2667 mutex_enter(&zone_status_lock);
2641 2668 while (zone->zone_status < status && timeleft != -1) {
2642 2669 timeleft = cv_timedwait(&zone->zone_cv, &zone_status_lock, tim);
2643 2670 }
2644 2671 mutex_exit(&zone_status_lock);
2645 2672 return (timeleft);
2646 2673 }
2647 2674
2648 2675 /*
2649 2676 * Block until the zone enters the requested state, the current process is
2650 2677 * signaled, or the timeout expires, whichever happens first. Return (-1) if
2651 2678 * operation timed out, 0 if signaled, time remaining otherwise.
2652 2679 */
2653 2680 clock_t
2654 2681 zone_status_timedwait_sig(zone_t *zone, clock_t tim, zone_status_t status)
2655 2682 {
2656 2683 clock_t timeleft = tim - ddi_get_lbolt();
2657 2684
2658 2685 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE);
2659 2686
2660 2687 mutex_enter(&zone_status_lock);
2661 2688 while (zone->zone_status < status) {
2662 2689 timeleft = cv_timedwait_sig(&zone->zone_cv, &zone_status_lock,
2663 2690 tim);
2664 2691 if (timeleft <= 0)
2665 2692 break;
2666 2693 }
2667 2694 mutex_exit(&zone_status_lock);
2668 2695 return (timeleft);
2669 2696 }
2670 2697
2671 2698 /*
2672 2699 * Zones have two reference counts: one for references from credential
2673 2700 * structures (zone_cred_ref), and one (zone_ref) for everything else.
2674 2701 * This is so we can allow a zone to be rebooted while there are still
2675 2702 * outstanding cred references, since certain drivers cache dblks (which
2676 2703 * implicitly results in cached creds). We wait for zone_ref to drop to
2677 2704 * 0 (actually 1), but not zone_cred_ref. The zone structure itself is
2678 2705 * later freed when the zone_cred_ref drops to 0, though nothing other
2679 2706 * than the zone id and privilege set should be accessed once the zone
2680 2707 * is "dead".
2681 2708 *
2682 2709 * A debugging flag, zone_wait_for_cred, can be set to a non-zero value
2683 2710 * to force halt/reboot to block waiting for the zone_cred_ref to drop
2684 2711 * to 0. This can be useful to flush out other sources of cached creds
2685 2712 * that may be less innocuous than the driver case.
2686 2713 *
2687 2714 * Zones also provide a tracked reference counting mechanism in which zone
2688 2715 * references are represented by "crumbs" (zone_ref structures). Crumbs help
2689 2716 * debuggers determine the sources of leaked zone references. See
2690 2717 * zone_hold_ref() and zone_rele_ref() below for more information.
2691 2718 */
2692 2719
2693 2720 int zone_wait_for_cred = 0;
2694 2721
2695 2722 static void
2696 2723 zone_hold_locked(zone_t *z)
2697 2724 {
2698 2725 ASSERT(MUTEX_HELD(&z->zone_lock));
2699 2726 z->zone_ref++;
2700 2727 ASSERT(z->zone_ref != 0);
2701 2728 }
2702 2729
2703 2730 /*
2704 2731 * Increment the specified zone's reference count. The zone's zone_t structure
2705 2732 * will not be freed as long as the zone's reference count is nonzero.
2706 2733 * Decrement the zone's reference count via zone_rele().
2707 2734 *
2708 2735 * NOTE: This function should only be used to hold zones for short periods of
2709 2736 * time. Use zone_hold_ref() if the zone must be held for a long time.
2710 2737 */
2711 2738 void
2712 2739 zone_hold(zone_t *z)
2713 2740 {
2714 2741 mutex_enter(&z->zone_lock);
2715 2742 zone_hold_locked(z);
2716 2743 mutex_exit(&z->zone_lock);
2717 2744 }
2718 2745
2719 2746 /*
2720 2747 * If the non-cred ref count drops to 1 and either the cred ref count
2721 2748 * is 0 or we aren't waiting for cred references, the zone is ready to
2722 2749 * be destroyed.
2723 2750 */
2724 2751 #define ZONE_IS_UNREF(zone) ((zone)->zone_ref == 1 && \
2725 2752 (!zone_wait_for_cred || (zone)->zone_cred_ref == 0))
2726 2753
2727 2754 /*
2728 2755 * Common zone reference release function invoked by zone_rele() and
2729 2756 * zone_rele_ref(). If subsys is ZONE_REF_NUM_SUBSYS, then the specified
2730 2757 * zone's subsystem-specific reference counters are not affected by the
2731 2758 * release. If ref is not NULL, then the zone_ref_t to which it refers is
2732 2759 * removed from the specified zone's reference list. ref must be non-NULL iff
2733 2760 * subsys is not ZONE_REF_NUM_SUBSYS.
2734 2761 */
2735 2762 static void
2736 2763 zone_rele_common(zone_t *z, zone_ref_t *ref, zone_ref_subsys_t subsys)
2737 2764 {
2738 2765 boolean_t wakeup;
2739 2766
2740 2767 mutex_enter(&z->zone_lock);
2741 2768 ASSERT(z->zone_ref != 0);
2742 2769 z->zone_ref--;
2743 2770 if (subsys != ZONE_REF_NUM_SUBSYS) {
2744 2771 ASSERT(z->zone_subsys_ref[subsys] != 0);
2745 2772 z->zone_subsys_ref[subsys]--;
2746 2773 list_remove(&z->zone_ref_list, ref);
2747 2774 }
2748 2775 if (z->zone_ref == 0 && z->zone_cred_ref == 0) {
2749 2776 /* no more refs, free the structure */
2750 2777 mutex_exit(&z->zone_lock);
2751 2778 zone_free(z);
2752 2779 return;
2753 2780 }
2754 2781 /* signal zone_destroy so the zone can finish halting */
2755 2782 wakeup = (ZONE_IS_UNREF(z) && zone_status_get(z) >= ZONE_IS_DEAD);
2756 2783 mutex_exit(&z->zone_lock);
2757 2784
2758 2785 if (wakeup) {
2759 2786 /*
2760 2787 * Grabbing zonehash_lock here effectively synchronizes with
2761 2788 * zone_destroy() to avoid missed signals.
2762 2789 */
2763 2790 mutex_enter(&zonehash_lock);
2764 2791 cv_broadcast(&zone_destroy_cv);
2765 2792 mutex_exit(&zonehash_lock);
2766 2793 }
2767 2794 }
2768 2795
2769 2796 /*
2770 2797 * Decrement the specified zone's reference count. The specified zone will
2771 2798 * cease to exist after this function returns if the reference count drops to
2772 2799 * zero. This function should be paired with zone_hold().
2773 2800 */
2774 2801 void
2775 2802 zone_rele(zone_t *z)
2776 2803 {
2777 2804 zone_rele_common(z, NULL, ZONE_REF_NUM_SUBSYS);
2778 2805 }
2779 2806
2780 2807 /*
2781 2808 * Initialize a zone reference structure. This function must be invoked for
2782 2809 * a reference structure before the structure is passed to zone_hold_ref().
2783 2810 */
2784 2811 void
2785 2812 zone_init_ref(zone_ref_t *ref)
2786 2813 {
2787 2814 ref->zref_zone = NULL;
2788 2815 list_link_init(&ref->zref_linkage);
2789 2816 }
2790 2817
2791 2818 /*
2792 2819 * Acquire a reference to zone z. The caller must specify the
2793 2820 * zone_ref_subsys_t constant associated with its subsystem. The specified
2794 2821 * zone_ref_t structure will represent a reference to the specified zone. Use
2795 2822 * zone_rele_ref() to release the reference.
2796 2823 *
2797 2824 * The referenced zone_t structure will not be freed as long as the zone_t's
2798 2825 * zone_status field is not ZONE_IS_DEAD and the zone has outstanding
2799 2826 * references.
2800 2827 *
2801 2828 * NOTE: The zone_ref_t structure must be initialized before it is used.
2802 2829 * See zone_init_ref() above.
2803 2830 */
2804 2831 void
2805 2832 zone_hold_ref(zone_t *z, zone_ref_t *ref, zone_ref_subsys_t subsys)
2806 2833 {
2807 2834 ASSERT(subsys >= 0 && subsys < ZONE_REF_NUM_SUBSYS);
2808 2835
2809 2836 /*
2810 2837 * Prevent consumers from reusing a reference structure before
2811 2838 * releasing it.
2812 2839 */
2813 2840 VERIFY(ref->zref_zone == NULL);
2814 2841
2815 2842 ref->zref_zone = z;
2816 2843 mutex_enter(&z->zone_lock);
2817 2844 zone_hold_locked(z);
2818 2845 z->zone_subsys_ref[subsys]++;
2819 2846 ASSERT(z->zone_subsys_ref[subsys] != 0);
2820 2847 list_insert_head(&z->zone_ref_list, ref);
2821 2848 mutex_exit(&z->zone_lock);
2822 2849 }
2823 2850
2824 2851 /*
2825 2852 * Release the zone reference represented by the specified zone_ref_t.
2826 2853 * The reference is invalid after it's released; however, the zone_ref_t
2827 2854 * structure can be reused without having to invoke zone_init_ref().
2828 2855 * subsys should be the same value that was passed to zone_hold_ref()
2829 2856 * when the reference was acquired.
2830 2857 */
2831 2858 void
2832 2859 zone_rele_ref(zone_ref_t *ref, zone_ref_subsys_t subsys)
2833 2860 {
2834 2861 zone_rele_common(ref->zref_zone, ref, subsys);
2835 2862
2836 2863 /*
2837 2864 * Set the zone_ref_t's zref_zone field to NULL to generate panics
2838 2865 * when consumers dereference the reference. This helps us catch
2839 2866 * consumers who use released references. Furthermore, this lets
2840 2867 * consumers reuse the zone_ref_t structure without having to
2841 2868 * invoke zone_init_ref().
2842 2869 */
2843 2870 ref->zref_zone = NULL;
2844 2871 }
2845 2872
2846 2873 void
2847 2874 zone_cred_hold(zone_t *z)
2848 2875 {
2849 2876 mutex_enter(&z->zone_lock);
2850 2877 z->zone_cred_ref++;
2851 2878 ASSERT(z->zone_cred_ref != 0);
2852 2879 mutex_exit(&z->zone_lock);
2853 2880 }
2854 2881
2855 2882 void
2856 2883 zone_cred_rele(zone_t *z)
2857 2884 {
2858 2885 boolean_t wakeup;
2859 2886
2860 2887 mutex_enter(&z->zone_lock);
2861 2888 ASSERT(z->zone_cred_ref != 0);
2862 2889 z->zone_cred_ref--;
2863 2890 if (z->zone_ref == 0 && z->zone_cred_ref == 0) {
2864 2891 /* no more refs, free the structure */
2865 2892 mutex_exit(&z->zone_lock);
2866 2893 zone_free(z);
2867 2894 return;
2868 2895 }
2869 2896 /*
2870 2897 * If zone_destroy is waiting for the cred references to drain
2871 2898 * out, and they have, signal it.
2872 2899 */
2873 2900 wakeup = (zone_wait_for_cred && ZONE_IS_UNREF(z) &&
2874 2901 zone_status_get(z) >= ZONE_IS_DEAD);
2875 2902 mutex_exit(&z->zone_lock);
2876 2903
2877 2904 if (wakeup) {
2878 2905 /*
2879 2906 * Grabbing zonehash_lock here effectively synchronizes with
2880 2907 * zone_destroy() to avoid missed signals.
2881 2908 */
2882 2909 mutex_enter(&zonehash_lock);
2883 2910 cv_broadcast(&zone_destroy_cv);
2884 2911 mutex_exit(&zonehash_lock);
2885 2912 }
2886 2913 }
2887 2914
2888 2915 void
2889 2916 zone_task_hold(zone_t *z)
2890 2917 {
2891 2918 mutex_enter(&z->zone_lock);
2892 2919 z->zone_ntasks++;
2893 2920 ASSERT(z->zone_ntasks != 0);
2894 2921 mutex_exit(&z->zone_lock);
2895 2922 }
2896 2923
2897 2924 void
2898 2925 zone_task_rele(zone_t *zone)
2899 2926 {
2900 2927 uint_t refcnt;
2901 2928
2902 2929 mutex_enter(&zone->zone_lock);
2903 2930 ASSERT(zone->zone_ntasks != 0);
2904 2931 refcnt = --zone->zone_ntasks;
2905 2932 if (refcnt > 1) { /* Common case */
2906 2933 mutex_exit(&zone->zone_lock);
2907 2934 return;
2908 2935 }
2909 2936 zone_hold_locked(zone); /* so we can use the zone_t later */
2910 2937 mutex_exit(&zone->zone_lock);
2911 2938 if (refcnt == 1) {
2912 2939 /*
2913 2940 * See if the zone is shutting down.
2914 2941 */
2915 2942 mutex_enter(&zone_status_lock);
2916 2943 if (zone_status_get(zone) != ZONE_IS_SHUTTING_DOWN) {
2917 2944 goto out;
2918 2945 }
2919 2946
2920 2947 /*
2921 2948 * Make sure the ntasks didn't change since we
2922 2949 * dropped zone_lock.
2923 2950 */
2924 2951 mutex_enter(&zone->zone_lock);
2925 2952 if (refcnt != zone->zone_ntasks) {
2926 2953 mutex_exit(&zone->zone_lock);
2927 2954 goto out;
2928 2955 }
2929 2956 mutex_exit(&zone->zone_lock);
2930 2957
2931 2958 /*
2932 2959 * No more user processes in the zone. The zone is empty.
2933 2960 */
2934 2961 zone_status_set(zone, ZONE_IS_EMPTY);
2935 2962 goto out;
2936 2963 }
2937 2964
2938 2965 ASSERT(refcnt == 0);
2939 2966 /*
2940 2967 * zsched has exited; the zone is dead.
2941 2968 */
2942 2969 zone->zone_zsched = NULL; /* paranoia */
2943 2970 mutex_enter(&zone_status_lock);
2944 2971 zone_status_set(zone, ZONE_IS_DEAD);
2945 2972 out:
2946 2973 mutex_exit(&zone_status_lock);
2947 2974 zone_rele(zone);
2948 2975 }
2949 2976
2950 2977 zoneid_t
2951 2978 getzoneid(void)
2952 2979 {
2953 2980 return (curproc->p_zone->zone_id);
2954 2981 }
2955 2982
2956 2983 /*
2957 2984 * Internal versions of zone_find_by_*(). These don't zone_hold() or
2958 2985 * check the validity of a zone's state.
2959 2986 */
2960 2987 static zone_t *
2961 2988 zone_find_all_by_id(zoneid_t zoneid)
2962 2989 {
2963 2990 mod_hash_val_t hv;
2964 2991 zone_t *zone = NULL;
2965 2992
2966 2993 ASSERT(MUTEX_HELD(&zonehash_lock));
2967 2994
2968 2995 if (mod_hash_find(zonehashbyid,
2969 2996 (mod_hash_key_t)(uintptr_t)zoneid, &hv) == 0)
2970 2997 zone = (zone_t *)hv;
2971 2998 return (zone);
2972 2999 }
2973 3000
2974 3001 static zone_t *
2975 3002 zone_find_all_by_label(const ts_label_t *label)
2976 3003 {
2977 3004 mod_hash_val_t hv;
2978 3005 zone_t *zone = NULL;
2979 3006
2980 3007 ASSERT(MUTEX_HELD(&zonehash_lock));
2981 3008
2982 3009 /*
2983 3010 * zonehashbylabel is not maintained for unlabeled systems
2984 3011 */
2985 3012 if (!is_system_labeled())
2986 3013 return (NULL);
2987 3014 if (mod_hash_find(zonehashbylabel, (mod_hash_key_t)label, &hv) == 0)
2988 3015 zone = (zone_t *)hv;
2989 3016 return (zone);
2990 3017 }
2991 3018
2992 3019 static zone_t *
2993 3020 zone_find_all_by_name(char *name)
2994 3021 {
2995 3022 mod_hash_val_t hv;
2996 3023 zone_t *zone = NULL;
2997 3024
2998 3025 ASSERT(MUTEX_HELD(&zonehash_lock));
2999 3026
3000 3027 if (mod_hash_find(zonehashbyname, (mod_hash_key_t)name, &hv) == 0)
3001 3028 zone = (zone_t *)hv;
3002 3029 return (zone);
3003 3030 }
3004 3031
3005 3032 /*
3006 3033 * Public interface for looking up a zone by zoneid. Only returns the zone if
3007 3034 * it is fully initialized, and has not yet begun the zone_destroy() sequence.
3008 3035 * Caller must call zone_rele() once it is done with the zone.
3009 3036 *
3010 3037 * The zone may begin the zone_destroy() sequence immediately after this
3011 3038 * function returns, but may be safely used until zone_rele() is called.
3012 3039 */
3013 3040 zone_t *
3014 3041 zone_find_by_id(zoneid_t zoneid)
3015 3042 {
3016 3043 zone_t *zone;
3017 3044 zone_status_t status;
3018 3045
3019 3046 mutex_enter(&zonehash_lock);
3020 3047 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
3021 3048 mutex_exit(&zonehash_lock);
3022 3049 return (NULL);
3023 3050 }
3024 3051 status = zone_status_get(zone);
3025 3052 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) {
3026 3053 /*
3027 3054 * For all practical purposes the zone doesn't exist.
3028 3055 */
3029 3056 mutex_exit(&zonehash_lock);
3030 3057 return (NULL);
3031 3058 }
3032 3059 zone_hold(zone);
3033 3060 mutex_exit(&zonehash_lock);
3034 3061 return (zone);
3035 3062 }
3036 3063
3037 3064 /*
3038 3065 * Similar to zone_find_by_id, but using zone label as the key.
3039 3066 */
3040 3067 zone_t *
3041 3068 zone_find_by_label(const ts_label_t *label)
3042 3069 {
3043 3070 zone_t *zone;
3044 3071 zone_status_t status;
3045 3072
3046 3073 mutex_enter(&zonehash_lock);
3047 3074 if ((zone = zone_find_all_by_label(label)) == NULL) {
3048 3075 mutex_exit(&zonehash_lock);
3049 3076 return (NULL);
3050 3077 }
3051 3078
3052 3079 status = zone_status_get(zone);
3053 3080 if (status > ZONE_IS_DOWN) {
3054 3081 /*
3055 3082 * For all practical purposes the zone doesn't exist.
3056 3083 */
3057 3084 mutex_exit(&zonehash_lock);
3058 3085 return (NULL);
3059 3086 }
3060 3087 zone_hold(zone);
3061 3088 mutex_exit(&zonehash_lock);
3062 3089 return (zone);
3063 3090 }
3064 3091
3065 3092 /*
3066 3093 * Similar to zone_find_by_id, but using zone name as the key.
3067 3094 */
3068 3095 zone_t *
3069 3096 zone_find_by_name(char *name)
3070 3097 {
3071 3098 zone_t *zone;
3072 3099 zone_status_t status;
3073 3100
3074 3101 mutex_enter(&zonehash_lock);
3075 3102 if ((zone = zone_find_all_by_name(name)) == NULL) {
3076 3103 mutex_exit(&zonehash_lock);
3077 3104 return (NULL);
3078 3105 }
3079 3106 status = zone_status_get(zone);
3080 3107 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) {
3081 3108 /*
3082 3109 * For all practical purposes the zone doesn't exist.
3083 3110 */
3084 3111 mutex_exit(&zonehash_lock);
3085 3112 return (NULL);
3086 3113 }
3087 3114 zone_hold(zone);
3088 3115 mutex_exit(&zonehash_lock);
3089 3116 return (zone);
3090 3117 }
3091 3118
3092 3119 /*
3093 3120 * Similar to zone_find_by_id(), using the path as a key. For instance,
3094 3121 * if there is a zone "foo" rooted at /foo/root, and the path argument
3095 3122 * is "/foo/root/proc", it will return the held zone_t corresponding to
3096 3123 * zone "foo".
3097 3124 *
3098 3125 * zone_find_by_path() always returns a non-NULL value, since at the
3099 3126 * very least every path will be contained in the global zone.
3100 3127 *
3101 3128 * As with the other zone_find_by_*() functions, the caller is
3102 3129 * responsible for zone_rele()ing the return value of this function.
3103 3130 */
3104 3131 zone_t *
3105 3132 zone_find_by_path(const char *path)
3106 3133 {
3107 3134 zone_t *zone;
3108 3135 zone_t *zret = NULL;
3109 3136 zone_status_t status;
3110 3137
3111 3138 if (path == NULL) {
3112 3139 /*
3113 3140 * Call from rootconf().
3114 3141 */
3115 3142 zone_hold(global_zone);
3116 3143 return (global_zone);
3117 3144 }
3118 3145 ASSERT(*path == '/');
3119 3146 mutex_enter(&zonehash_lock);
3120 3147 for (zone = list_head(&zone_active); zone != NULL;
3121 3148 zone = list_next(&zone_active, zone)) {
3122 3149 if (ZONE_PATH_VISIBLE(path, zone))
3123 3150 zret = zone;
3124 3151 }
3125 3152 ASSERT(zret != NULL);
3126 3153 status = zone_status_get(zret);
3127 3154 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) {
3128 3155 /*
3129 3156 * Zone practically doesn't exist.
3130 3157 */
3131 3158 zret = global_zone;
3132 3159 }
3133 3160 zone_hold(zret);
3134 3161 mutex_exit(&zonehash_lock);
3135 3162 return (zret);
3136 3163 }
3137 3164
3138 3165 /*
3139 3166 * Public interface for updating per-zone load averages. Called once per
3140 3167 * second.
3141 3168 *
3142 3169 * Based on loadavg_update(), genloadavg() and calcloadavg() from clock.c.
3143 3170 */
3144 3171 void
3145 3172 zone_loadavg_update()
3146 3173 {
3147 3174 zone_t *zp;
3148 3175 zone_status_t status;
3149 3176 struct loadavg_s *lavg;
3150 3177 hrtime_t zone_total;
3151 3178 int i;
3152 3179 hrtime_t hr_avg;
3153 3180 int nrun;
3154 3181 static int64_t f[3] = { 135, 27, 9 };
3155 3182 int64_t q, r;
3156 3183
3157 3184 mutex_enter(&zonehash_lock);
3158 3185 for (zp = list_head(&zone_active); zp != NULL;
3159 3186 zp = list_next(&zone_active, zp)) {
3160 3187 mutex_enter(&zp->zone_lock);
3161 3188
3162 3189 /* Skip zones that are on the way down or not yet up */
3163 3190 status = zone_status_get(zp);
3164 3191 if (status < ZONE_IS_READY || status >= ZONE_IS_DOWN) {
3165 3192 /* For all practical purposes the zone doesn't exist. */
3166 3193 mutex_exit(&zp->zone_lock);
3167 3194 continue;
3168 3195 }
3169 3196
3170 3197 /*
3171 3198 * Update the 10 second moving average data in zone_loadavg.
3172 3199 */
3173 3200 lavg = &zp->zone_loadavg;
3174 3201
3175 3202 zone_total = zp->zone_utime + zp->zone_stime + zp->zone_wtime;
3176 3203 scalehrtime(&zone_total);
3177 3204
3178 3205 /* The zone_total should always be increasing. */
3179 3206 lavg->lg_loads[lavg->lg_cur] = (zone_total > lavg->lg_total) ?
3180 3207 zone_total - lavg->lg_total : 0;
3181 3208 lavg->lg_cur = (lavg->lg_cur + 1) % S_LOADAVG_SZ;
3182 3209 /* lg_total holds the prev. 1 sec. total */
3183 3210 lavg->lg_total = zone_total;
3184 3211
3185 3212 /*
3186 3213 * To simplify the calculation, we don't calculate the load avg.
3187 3214 * until the zone has been up for at least 10 seconds and our
3188 3215 * moving average is thus full.
3189 3216 */
3190 3217 if ((lavg->lg_len + 1) < S_LOADAVG_SZ) {
3191 3218 lavg->lg_len++;
3192 3219 mutex_exit(&zp->zone_lock);
3193 3220 continue;
3194 3221 }
3195 3222
3196 3223 /* Now calculate the 1min, 5min, 15 min load avg. */
3197 3224 hr_avg = 0;
3198 3225 for (i = 0; i < S_LOADAVG_SZ; i++)
3199 3226 hr_avg += lavg->lg_loads[i];
3200 3227 hr_avg = hr_avg / S_LOADAVG_SZ;
3201 3228 nrun = hr_avg / (NANOSEC / LGRP_LOADAVG_IN_THREAD_MAX);
3202 3229
3203 3230 /* Compute load avg. See comment in calcloadavg() */
3204 3231 for (i = 0; i < 3; i++) {
3205 3232 q = (zp->zone_hp_avenrun[i] >> 16) << 7;
3206 3233 r = (zp->zone_hp_avenrun[i] & 0xffff) << 7;
3207 3234 zp->zone_hp_avenrun[i] +=
3208 3235 ((nrun - q) * f[i] - ((r * f[i]) >> 16)) >> 4;
3209 3236
3210 3237 /* avenrun[] can only hold 31 bits of load avg. */
3211 3238 if (zp->zone_hp_avenrun[i] <
3212 3239 ((uint64_t)1<<(31+16-FSHIFT)))
3213 3240 zp->zone_avenrun[i] = (int32_t)
3214 3241 (zp->zone_hp_avenrun[i] >> (16 - FSHIFT));
3215 3242 else
3216 3243 zp->zone_avenrun[i] = 0x7fffffff;
3217 3244 }
3218 3245
3219 3246 mutex_exit(&zp->zone_lock);
3220 3247 }
3221 3248 mutex_exit(&zonehash_lock);
3222 3249 }
3223 3250
3224 3251 /*
3225 3252 * Get the number of cpus visible to this zone. The system-wide global
3226 3253 * 'ncpus' is returned if pools are disabled, the caller is in the
3227 3254 * global zone, or a NULL zone argument is passed in.
3228 3255 */
3229 3256 int
3230 3257 zone_ncpus_get(zone_t *zone)
3231 3258 {
3232 3259 int myncpus = zone == NULL ? 0 : zone->zone_ncpus;
3233 3260
3234 3261 return (myncpus != 0 ? myncpus : ncpus);
3235 3262 }
3236 3263
3237 3264 /*
3238 3265 * Get the number of online cpus visible to this zone. The system-wide
3239 3266 * global 'ncpus_online' is returned if pools are disabled, the caller
3240 3267 * is in the global zone, or a NULL zone argument is passed in.
3241 3268 */
3242 3269 int
3243 3270 zone_ncpus_online_get(zone_t *zone)
3244 3271 {
3245 3272 int myncpus_online = zone == NULL ? 0 : zone->zone_ncpus_online;
3246 3273
3247 3274 return (myncpus_online != 0 ? myncpus_online : ncpus_online);
3248 3275 }
3249 3276
3250 3277 /*
3251 3278 * Return the pool to which the zone is currently bound.
3252 3279 */
3253 3280 pool_t *
3254 3281 zone_pool_get(zone_t *zone)
3255 3282 {
3256 3283 ASSERT(pool_lock_held());
3257 3284
3258 3285 return (zone->zone_pool);
3259 3286 }
3260 3287
3261 3288 /*
3262 3289 * Set the zone's pool pointer and update the zone's visibility to match
3263 3290 * the resources in the new pool.
3264 3291 */
3265 3292 void
3266 3293 zone_pool_set(zone_t *zone, pool_t *pool)
3267 3294 {
3268 3295 ASSERT(pool_lock_held());
3269 3296 ASSERT(MUTEX_HELD(&cpu_lock));
3270 3297
3271 3298 zone->zone_pool = pool;
3272 3299 zone_pset_set(zone, pool->pool_pset->pset_id);
3273 3300 }
3274 3301
3275 3302 /*
3276 3303 * Return the cached value of the id of the processor set to which the
3277 3304 * zone is currently bound. The value will be ZONE_PS_INVAL if the pools
3278 3305 * facility is disabled.
3279 3306 */
3280 3307 psetid_t
3281 3308 zone_pset_get(zone_t *zone)
3282 3309 {
3283 3310 ASSERT(MUTEX_HELD(&cpu_lock));
3284 3311
3285 3312 return (zone->zone_psetid);
3286 3313 }
3287 3314
3288 3315 /*
3289 3316 * Set the cached value of the id of the processor set to which the zone
3290 3317 * is currently bound. Also update the zone's visibility to match the
3291 3318 * resources in the new processor set.
3292 3319 */
3293 3320 void
3294 3321 zone_pset_set(zone_t *zone, psetid_t newpsetid)
3295 3322 {
3296 3323 psetid_t oldpsetid;
3297 3324
3298 3325 ASSERT(MUTEX_HELD(&cpu_lock));
3299 3326 oldpsetid = zone_pset_get(zone);
3300 3327
3301 3328 if (oldpsetid == newpsetid)
3302 3329 return;
3303 3330 /*
3304 3331 * Global zone sees all.
3305 3332 */
3306 3333 if (zone != global_zone) {
3307 3334 zone->zone_psetid = newpsetid;
3308 3335 if (newpsetid != ZONE_PS_INVAL)
3309 3336 pool_pset_visibility_add(newpsetid, zone);
3310 3337 if (oldpsetid != ZONE_PS_INVAL)
3311 3338 pool_pset_visibility_remove(oldpsetid, zone);
3312 3339 }
3313 3340 /*
3314 3341 * Disabling pools, so we should start using the global values
3315 3342 * for ncpus and ncpus_online.
3316 3343 */
3317 3344 if (newpsetid == ZONE_PS_INVAL) {
3318 3345 zone->zone_ncpus = 0;
3319 3346 zone->zone_ncpus_online = 0;
3320 3347 }
3321 3348 }
3322 3349
3323 3350 /*
3324 3351 * Walk the list of active zones and issue the provided callback for
3325 3352 * each of them.
3326 3353 *
3327 3354 * Caller must not be holding any locks that may be acquired under
3328 3355 * zonehash_lock. See comment at the beginning of the file for a list of
3329 3356 * common locks and their interactions with zones.
3330 3357 */
3331 3358 int
3332 3359 zone_walk(int (*cb)(zone_t *, void *), void *data)
3333 3360 {
3334 3361 zone_t *zone;
3335 3362 int ret = 0;
3336 3363 zone_status_t status;
3337 3364
3338 3365 mutex_enter(&zonehash_lock);
3339 3366 for (zone = list_head(&zone_active); zone != NULL;
3340 3367 zone = list_next(&zone_active, zone)) {
3341 3368 /*
3342 3369 * Skip zones that shouldn't be externally visible.
3343 3370 */
3344 3371 status = zone_status_get(zone);
3345 3372 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN)
3346 3373 continue;
3347 3374 /*
3348 3375 * Bail immediately if any callback invocation returns a
3349 3376 * non-zero value.
3350 3377 */
3351 3378 ret = (*cb)(zone, data);
3352 3379 if (ret != 0)
3353 3380 break;
3354 3381 }
3355 3382 mutex_exit(&zonehash_lock);
3356 3383 return (ret);
3357 3384 }
3358 3385
3359 3386 static int
3360 3387 zone_set_root(zone_t *zone, const char *upath)
3361 3388 {
3362 3389 vnode_t *vp;
3363 3390 int trycount;
3364 3391 int error = 0;
3365 3392 char *path;
3366 3393 struct pathname upn, pn;
3367 3394 size_t pathlen;
3368 3395
3369 3396 if ((error = pn_get((char *)upath, UIO_USERSPACE, &upn)) != 0)
3370 3397 return (error);
3371 3398
3372 3399 pn_alloc(&pn);
3373 3400
3374 3401 /* prevent infinite loop */
3375 3402 trycount = 10;
3376 3403 for (;;) {
3377 3404 if (--trycount <= 0) {
3378 3405 error = ESTALE;
3379 3406 goto out;
3380 3407 }
3381 3408
3382 3409 if ((error = lookuppn(&upn, &pn, FOLLOW, NULLVPP, &vp)) == 0) {
3383 3410 /*
3384 3411 * VOP_ACCESS() may cover 'vp' with a new
3385 3412 * filesystem, if 'vp' is an autoFS vnode.
3386 3413 * Get the new 'vp' if so.
3387 3414 */
3388 3415 if ((error =
3389 3416 VOP_ACCESS(vp, VEXEC, 0, CRED(), NULL)) == 0 &&
3390 3417 (!vn_ismntpt(vp) ||
3391 3418 (error = traverse(&vp)) == 0)) {
3392 3419 pathlen = pn.pn_pathlen + 2;
3393 3420 path = kmem_alloc(pathlen, KM_SLEEP);
3394 3421 (void) strncpy(path, pn.pn_path,
3395 3422 pn.pn_pathlen + 1);
3396 3423 path[pathlen - 2] = '/';
3397 3424 path[pathlen - 1] = '\0';
3398 3425 pn_free(&pn);
3399 3426 pn_free(&upn);
3400 3427
3401 3428 /* Success! */
3402 3429 break;
3403 3430 }
3404 3431 VN_RELE(vp);
3405 3432 }
3406 3433 if (error != ESTALE)
3407 3434 goto out;
3408 3435 }
3409 3436
3410 3437 ASSERT(error == 0);
3411 3438 zone->zone_rootvp = vp; /* we hold a reference to vp */
3412 3439 zone->zone_rootpath = path;
3413 3440 zone->zone_rootpathlen = pathlen;
3414 3441 if (pathlen > 5 && strcmp(path + pathlen - 5, "/lu/") == 0)
3415 3442 zone->zone_flags |= ZF_IS_SCRATCH;
3416 3443 return (0);
3417 3444
3418 3445 out:
3419 3446 pn_free(&pn);
3420 3447 pn_free(&upn);
3421 3448 return (error);
3422 3449 }
3423 3450
3424 3451 #define isalnum(c) (((c) >= '0' && (c) <= '9') || \
3425 3452 ((c) >= 'a' && (c) <= 'z') || \
3426 3453 ((c) >= 'A' && (c) <= 'Z'))
3427 3454
3428 3455 static int
3429 3456 zone_set_name(zone_t *zone, const char *uname)
3430 3457 {
3431 3458 char *kname = kmem_zalloc(ZONENAME_MAX, KM_SLEEP);
3432 3459 size_t len;
3433 3460 int i, err;
3434 3461
3435 3462 if ((err = copyinstr(uname, kname, ZONENAME_MAX, &len)) != 0) {
3436 3463 kmem_free(kname, ZONENAME_MAX);
3437 3464 return (err); /* EFAULT or ENAMETOOLONG */
3438 3465 }
3439 3466
3440 3467 /* must be less than ZONENAME_MAX */
3441 3468 if (len == ZONENAME_MAX && kname[ZONENAME_MAX - 1] != '\0') {
3442 3469 kmem_free(kname, ZONENAME_MAX);
3443 3470 return (EINVAL);
3444 3471 }
3445 3472
3446 3473 /*
3447 3474 * Name must start with an alphanumeric and must contain only
3448 3475 * alphanumerics, '-', '_' and '.'.
3449 3476 */
3450 3477 if (!isalnum(kname[0])) {
3451 3478 kmem_free(kname, ZONENAME_MAX);
3452 3479 return (EINVAL);
3453 3480 }
3454 3481 for (i = 1; i < len - 1; i++) {
3455 3482 if (!isalnum(kname[i]) && kname[i] != '-' && kname[i] != '_' &&
3456 3483 kname[i] != '.') {
3457 3484 kmem_free(kname, ZONENAME_MAX);
3458 3485 return (EINVAL);
3459 3486 }
3460 3487 }
3461 3488
3462 3489 zone->zone_name = kname;
3463 3490 return (0);
3464 3491 }
3465 3492
3466 3493 /*
3467 3494 * Gets the 32-bit hostid of the specified zone as an unsigned int. If 'zonep'
3468 3495 * is NULL or it points to a zone with no hostid emulation, then the machine's
3469 3496 * hostid (i.e., the global zone's hostid) is returned. This function returns
3470 3497 * zero if neither the zone nor the host machine (global zone) have hostids. It
3471 3498 * returns HW_INVALID_HOSTID if the function attempts to return the machine's
3472 3499 * hostid and the machine's hostid is invalid.
3473 3500 */
3474 3501 uint32_t
3475 3502 zone_get_hostid(zone_t *zonep)
3476 3503 {
3477 3504 unsigned long machine_hostid;
3478 3505
3479 3506 if (zonep == NULL || zonep->zone_hostid == HW_INVALID_HOSTID) {
3480 3507 if (ddi_strtoul(hw_serial, NULL, 10, &machine_hostid) != 0)
3481 3508 return (HW_INVALID_HOSTID);
3482 3509 return ((uint32_t)machine_hostid);
3483 3510 }
3484 3511 return (zonep->zone_hostid);
3485 3512 }
3486 3513
3487 3514 /*
3488 3515 * Similar to thread_create(), but makes sure the thread is in the appropriate
3489 3516 * zone's zsched process (curproc->p_zone->zone_zsched) before returning.
3490 3517 */
3491 3518 /*ARGSUSED*/
3492 3519 kthread_t *
3493 3520 zthread_create(
3494 3521 caddr_t stk,
3495 3522 size_t stksize,
3496 3523 void (*proc)(),
3497 3524 void *arg,
3498 3525 size_t len,
3499 3526 pri_t pri)
3500 3527 {
3501 3528 kthread_t *t;
3502 3529 zone_t *zone = curproc->p_zone;
3503 3530 proc_t *pp = zone->zone_zsched;
3504 3531
3505 3532 zone_hold(zone); /* Reference to be dropped when thread exits */
3506 3533
3507 3534 /*
3508 3535 * No-one should be trying to create threads if the zone is shutting
3509 3536 * down and there aren't any kernel threads around. See comment
3510 3537 * in zthread_exit().
3511 3538 */
3512 3539 ASSERT(!(zone->zone_kthreads == NULL &&
3513 3540 zone_status_get(zone) >= ZONE_IS_EMPTY));
3514 3541 /*
3515 3542 * Create a thread, but don't let it run until we've finished setting
3516 3543 * things up.
3517 3544 */
3518 3545 t = thread_create(stk, stksize, proc, arg, len, pp, TS_STOPPED, pri);
3519 3546 ASSERT(t->t_forw == NULL);
3520 3547 mutex_enter(&zone_status_lock);
3521 3548 if (zone->zone_kthreads == NULL) {
3522 3549 t->t_forw = t->t_back = t;
3523 3550 } else {
3524 3551 kthread_t *tx = zone->zone_kthreads;
3525 3552
3526 3553 t->t_forw = tx;
3527 3554 t->t_back = tx->t_back;
3528 3555 tx->t_back->t_forw = t;
3529 3556 tx->t_back = t;
3530 3557 }
3531 3558 zone->zone_kthreads = t;
3532 3559 mutex_exit(&zone_status_lock);
3533 3560
3534 3561 mutex_enter(&pp->p_lock);
3535 3562 t->t_proc_flag |= TP_ZTHREAD;
3536 3563 project_rele(t->t_proj);
3537 3564 t->t_proj = project_hold(pp->p_task->tk_proj);
3538 3565
3539 3566 /*
3540 3567 * Setup complete, let it run.
3541 3568 */
3542 3569 thread_lock(t);
3543 3570 t->t_schedflag |= TS_ALLSTART;
3544 3571 setrun_locked(t);
3545 3572 thread_unlock(t);
3546 3573
3547 3574 mutex_exit(&pp->p_lock);
3548 3575
3549 3576 return (t);
3550 3577 }
3551 3578
3552 3579 /*
3553 3580 * Similar to thread_exit(). Must be called by threads created via
3554 3581 * zthread_exit().
3555 3582 */
3556 3583 void
3557 3584 zthread_exit(void)
3558 3585 {
3559 3586 kthread_t *t = curthread;
3560 3587 proc_t *pp = curproc;
3561 3588 zone_t *zone = pp->p_zone;
3562 3589
3563 3590 mutex_enter(&zone_status_lock);
3564 3591
3565 3592 /*
3566 3593 * Reparent to p0
3567 3594 */
3568 3595 kpreempt_disable();
3569 3596 mutex_enter(&pp->p_lock);
3570 3597 t->t_proc_flag &= ~TP_ZTHREAD;
3571 3598 t->t_procp = &p0;
3572 3599 hat_thread_exit(t);
3573 3600 mutex_exit(&pp->p_lock);
3574 3601 kpreempt_enable();
3575 3602
3576 3603 if (t->t_back == t) {
3577 3604 ASSERT(t->t_forw == t);
3578 3605 /*
3579 3606 * If the zone is empty, once the thread count
3580 3607 * goes to zero no further kernel threads can be
3581 3608 * created. This is because if the creator is a process
3582 3609 * in the zone, then it must have exited before the zone
3583 3610 * state could be set to ZONE_IS_EMPTY.
3584 3611 * Otherwise, if the creator is a kernel thread in the
3585 3612 * zone, the thread count is non-zero.
3586 3613 *
3587 3614 * This really means that non-zone kernel threads should
3588 3615 * not create zone kernel threads.
3589 3616 */
3590 3617 zone->zone_kthreads = NULL;
3591 3618 if (zone_status_get(zone) == ZONE_IS_EMPTY) {
3592 3619 zone_status_set(zone, ZONE_IS_DOWN);
3593 3620 /*
3594 3621 * Remove any CPU caps on this zone.
3595 3622 */
3596 3623 cpucaps_zone_remove(zone);
3597 3624 }
3598 3625 } else {
3599 3626 t->t_forw->t_back = t->t_back;
3600 3627 t->t_back->t_forw = t->t_forw;
3601 3628 if (zone->zone_kthreads == t)
3602 3629 zone->zone_kthreads = t->t_forw;
3603 3630 }
3604 3631 mutex_exit(&zone_status_lock);
3605 3632 zone_rele(zone);
3606 3633 thread_exit();
3607 3634 /* NOTREACHED */
3608 3635 }
3609 3636
3610 3637 static void
3611 3638 zone_chdir(vnode_t *vp, vnode_t **vpp, proc_t *pp)
3612 3639 {
3613 3640 vnode_t *oldvp;
3614 3641
3615 3642 /* we're going to hold a reference here to the directory */
3616 3643 VN_HOLD(vp);
3617 3644
3618 3645 /* update abs cwd/root path see c2/audit.c */
3619 3646 if (AU_AUDITING())
3620 3647 audit_chdirec(vp, vpp);
3621 3648
3622 3649 mutex_enter(&pp->p_lock);
3623 3650 oldvp = *vpp;
3624 3651 *vpp = vp;
3625 3652 mutex_exit(&pp->p_lock);
3626 3653 if (oldvp != NULL)
3627 3654 VN_RELE(oldvp);
3628 3655 }
3629 3656
3630 3657 /*
3631 3658 * Convert an rctl value represented by an nvlist_t into an rctl_val_t.
3632 3659 */
3633 3660 static int
3634 3661 nvlist2rctlval(nvlist_t *nvl, rctl_val_t *rv)
3635 3662 {
3636 3663 nvpair_t *nvp = NULL;
3637 3664 boolean_t priv_set = B_FALSE;
3638 3665 boolean_t limit_set = B_FALSE;
3639 3666 boolean_t action_set = B_FALSE;
3640 3667
3641 3668 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
3642 3669 const char *name;
3643 3670 uint64_t ui64;
3644 3671
3645 3672 name = nvpair_name(nvp);
3646 3673 if (nvpair_type(nvp) != DATA_TYPE_UINT64)
3647 3674 return (EINVAL);
3648 3675 (void) nvpair_value_uint64(nvp, &ui64);
3649 3676 if (strcmp(name, "privilege") == 0) {
3650 3677 /*
3651 3678 * Currently only privileged values are allowed, but
3652 3679 * this may change in the future.
3653 3680 */
3654 3681 if (ui64 != RCPRIV_PRIVILEGED)
3655 3682 return (EINVAL);
3656 3683 rv->rcv_privilege = ui64;
3657 3684 priv_set = B_TRUE;
3658 3685 } else if (strcmp(name, "limit") == 0) {
3659 3686 rv->rcv_value = ui64;
3660 3687 limit_set = B_TRUE;
3661 3688 } else if (strcmp(name, "action") == 0) {
3662 3689 if (ui64 != RCTL_LOCAL_NOACTION &&
3663 3690 ui64 != RCTL_LOCAL_DENY)
3664 3691 return (EINVAL);
3665 3692 rv->rcv_flagaction = ui64;
3666 3693 action_set = B_TRUE;
3667 3694 } else {
3668 3695 return (EINVAL);
3669 3696 }
3670 3697 }
3671 3698
3672 3699 if (!(priv_set && limit_set && action_set))
3673 3700 return (EINVAL);
3674 3701 rv->rcv_action_signal = 0;
3675 3702 rv->rcv_action_recipient = NULL;
3676 3703 rv->rcv_action_recip_pid = -1;
3677 3704 rv->rcv_firing_time = 0;
3678 3705
3679 3706 return (0);
3680 3707 }
3681 3708
3682 3709 /*
3683 3710 * Non-global zone version of start_init.
3684 3711 */
3685 3712 void
3686 3713 zone_start_init(void)
3687 3714 {
3688 3715 proc_t *p = ttoproc(curthread);
3689 3716 zone_t *z = p->p_zone;
3690 3717
3691 3718 ASSERT(!INGLOBALZONE(curproc));
3692 3719
3693 3720 /*
3694 3721 * For all purposes (ZONE_ATTR_INITPID and restart_init),
3695 3722 * storing just the pid of init is sufficient.
3696 3723 */
3697 3724 z->zone_proc_initpid = p->p_pid;
3698 3725
3699 3726 /*
3700 3727 * We maintain zone_boot_err so that we can return the cause of the
3701 3728 * failure back to the caller of the zone_boot syscall.
3702 3729 */
3703 3730 p->p_zone->zone_boot_err = start_init_common();
3704 3731
3705 3732 /*
3706 3733 * We will prevent booting zones from becoming running zones if the
3707 3734 * global zone is shutting down.
3708 3735 */
3709 3736 mutex_enter(&zone_status_lock);
3710 3737 if (z->zone_boot_err != 0 || zone_status_get(global_zone) >=
3711 3738 ZONE_IS_SHUTTING_DOWN) {
3712 3739 /*
3713 3740 * Make sure we are still in the booting state-- we could have
3714 3741 * raced and already be shutting down, or even further along.
3715 3742 */
3716 3743 if (zone_status_get(z) == ZONE_IS_BOOTING) {
3717 3744 zone_status_set(z, ZONE_IS_SHUTTING_DOWN);
3718 3745 }
3719 3746 mutex_exit(&zone_status_lock);
3720 3747 /* It's gone bad, dispose of the process */
3721 3748 if (proc_exit(CLD_EXITED, z->zone_boot_err) != 0) {
3722 3749 mutex_enter(&p->p_lock);
3723 3750 ASSERT(p->p_flag & SEXITLWPS);
3724 3751 lwp_exit();
3725 3752 }
3726 3753 } else {
3727 3754 if (zone_status_get(z) == ZONE_IS_BOOTING)
3728 3755 zone_status_set(z, ZONE_IS_RUNNING);
3729 3756 mutex_exit(&zone_status_lock);
3730 3757 /* cause the process to return to userland. */
3731 3758 lwp_rtt();
3732 3759 }
3733 3760 }
3734 3761
3735 3762 struct zsched_arg {
3736 3763 zone_t *zone;
3737 3764 nvlist_t *nvlist;
3738 3765 };
3739 3766
3740 3767 /*
3741 3768 * Per-zone "sched" workalike. The similarity to "sched" doesn't have
3742 3769 * anything to do with scheduling, but rather with the fact that
3743 3770 * per-zone kernel threads are parented to zsched, just like regular
3744 3771 * kernel threads are parented to sched (p0).
3745 3772 *
3746 3773 * zsched is also responsible for launching init for the zone.
3747 3774 */
3748 3775 static void
3749 3776 zsched(void *arg)
3750 3777 {
3751 3778 struct zsched_arg *za = arg;
3752 3779 proc_t *pp = curproc;
3753 3780 proc_t *initp = proc_init;
3754 3781 zone_t *zone = za->zone;
3755 3782 cred_t *cr, *oldcred;
3756 3783 rctl_set_t *set;
3757 3784 rctl_alloc_gp_t *gp;
3758 3785 contract_t *ct = NULL;
3759 3786 task_t *tk, *oldtk;
3760 3787 rctl_entity_p_t e;
3761 3788 kproject_t *pj;
3762 3789
3763 3790 nvlist_t *nvl = za->nvlist;
3764 3791 nvpair_t *nvp = NULL;
3765 3792
3766 3793 bcopy("zsched", PTOU(pp)->u_psargs, sizeof ("zsched"));
3767 3794 bcopy("zsched", PTOU(pp)->u_comm, sizeof ("zsched"));
3768 3795 PTOU(pp)->u_argc = 0;
3769 3796 PTOU(pp)->u_argv = NULL;
3770 3797 PTOU(pp)->u_envp = NULL;
3771 3798 closeall(P_FINFO(pp));
3772 3799
3773 3800 /*
3774 3801 * We are this zone's "zsched" process. As the zone isn't generally
3775 3802 * visible yet we don't need to grab any locks before initializing its
3776 3803 * zone_proc pointer.
3777 3804 */
3778 3805 zone_hold(zone); /* this hold is released by zone_destroy() */
3779 3806 zone->zone_zsched = pp;
3780 3807 mutex_enter(&pp->p_lock);
3781 3808 pp->p_zone = zone;
3782 3809 mutex_exit(&pp->p_lock);
3783 3810
3784 3811 /*
3785 3812 * Disassociate process from its 'parent'; parent ourselves to init
3786 3813 * (pid 1) and change other values as needed.
3787 3814 */
3788 3815 sess_create();
3789 3816
3790 3817 mutex_enter(&pidlock);
3791 3818 proc_detach(pp);
3792 3819 pp->p_ppid = 1;
3793 3820 pp->p_flag |= SZONETOP;
3794 3821 pp->p_ancpid = 1;
3795 3822 pp->p_parent = initp;
3796 3823 pp->p_psibling = NULL;
3797 3824 if (initp->p_child)
3798 3825 initp->p_child->p_psibling = pp;
3799 3826 pp->p_sibling = initp->p_child;
3800 3827 initp->p_child = pp;
3801 3828
3802 3829 /* Decrement what newproc() incremented. */
3803 3830 upcount_dec(crgetruid(CRED()), GLOBAL_ZONEID);
3804 3831 /*
3805 3832 * Our credentials are about to become kcred-like, so we don't care
3806 3833 * about the caller's ruid.
3807 3834 */
3808 3835 upcount_inc(crgetruid(kcred), zone->zone_id);
3809 3836 mutex_exit(&pidlock);
3810 3837
3811 3838 /*
3812 3839 * getting out of global zone, so decrement lwp and process counts
3813 3840 */
3814 3841 pj = pp->p_task->tk_proj;
3815 3842 mutex_enter(&global_zone->zone_nlwps_lock);
3816 3843 pj->kpj_nlwps -= pp->p_lwpcnt;
3817 3844 global_zone->zone_nlwps -= pp->p_lwpcnt;
3818 3845 pj->kpj_nprocs--;
3819 3846 global_zone->zone_nprocs--;
3820 3847 mutex_exit(&global_zone->zone_nlwps_lock);
3821 3848
3822 3849 /*
3823 3850 * Decrement locked memory counts on old zone and project.
3824 3851 */
3825 3852 mutex_enter(&global_zone->zone_mem_lock);
3826 3853 global_zone->zone_locked_mem -= pp->p_locked_mem;
3827 3854 pj->kpj_data.kpd_locked_mem -= pp->p_locked_mem;
3828 3855 mutex_exit(&global_zone->zone_mem_lock);
3829 3856
3830 3857 /*
3831 3858 * Create and join a new task in project '0' of this zone.
3832 3859 *
3833 3860 * We don't need to call holdlwps() since we know we're the only lwp in
3834 3861 * this process.
3835 3862 *
3836 3863 * task_join() returns with p_lock held.
3837 3864 */
3838 3865 tk = task_create(0, zone);
3839 3866 mutex_enter(&cpu_lock);
3840 3867 oldtk = task_join(tk, 0);
3841 3868
3842 3869 pj = pp->p_task->tk_proj;
3843 3870
3844 3871 mutex_enter(&zone->zone_mem_lock);
3845 3872 zone->zone_locked_mem += pp->p_locked_mem;
3846 3873 pj->kpj_data.kpd_locked_mem += pp->p_locked_mem;
3847 3874 mutex_exit(&zone->zone_mem_lock);
3848 3875
3849 3876 /*
3850 3877 * add lwp and process counts to zsched's zone, and increment
3851 3878 * project's task and process count due to the task created in
3852 3879 * the above task_create.
3853 3880 */
3854 3881 mutex_enter(&zone->zone_nlwps_lock);
3855 3882 pj->kpj_nlwps += pp->p_lwpcnt;
3856 3883 pj->kpj_ntasks += 1;
3857 3884 zone->zone_nlwps += pp->p_lwpcnt;
3858 3885 pj->kpj_nprocs++;
3859 3886 zone->zone_nprocs++;
3860 3887 mutex_exit(&zone->zone_nlwps_lock);
3861 3888
3862 3889 mutex_exit(&curproc->p_lock);
3863 3890 mutex_exit(&cpu_lock);
3864 3891 task_rele(oldtk);
3865 3892
3866 3893 /*
3867 3894 * The process was created by a process in the global zone, hence the
3868 3895 * credentials are wrong. We might as well have kcred-ish credentials.
3869 3896 */
3870 3897 cr = zone->zone_kcred;
3871 3898 crhold(cr);
3872 3899 mutex_enter(&pp->p_crlock);
3873 3900 oldcred = pp->p_cred;
3874 3901 pp->p_cred = cr;
3875 3902 mutex_exit(&pp->p_crlock);
3876 3903 crfree(oldcred);
3877 3904
3878 3905 /*
3879 3906 * Hold credentials again (for thread)
3880 3907 */
3881 3908 crhold(cr);
3882 3909
3883 3910 /*
3884 3911 * p_lwpcnt can't change since this is a kernel process.
3885 3912 */
3886 3913 crset(pp, cr);
3887 3914
3888 3915 /*
3889 3916 * Chroot
3890 3917 */
3891 3918 zone_chdir(zone->zone_rootvp, &PTOU(pp)->u_cdir, pp);
3892 3919 zone_chdir(zone->zone_rootvp, &PTOU(pp)->u_rdir, pp);
3893 3920
3894 3921 /*
3895 3922 * Initialize zone's rctl set.
3896 3923 */
3897 3924 set = rctl_set_create();
3898 3925 gp = rctl_set_init_prealloc(RCENTITY_ZONE);
3899 3926 mutex_enter(&pp->p_lock);
3900 3927 e.rcep_p.zone = zone;
3901 3928 e.rcep_t = RCENTITY_ZONE;
3902 3929 zone->zone_rctls = rctl_set_init(RCENTITY_ZONE, pp, &e, set, gp);
3903 3930 mutex_exit(&pp->p_lock);
3904 3931 rctl_prealloc_destroy(gp);
3905 3932
3906 3933 /*
3907 3934 * Apply the rctls passed in to zone_create(). This is basically a list
3908 3935 * assignment: all of the old values are removed and the new ones
3909 3936 * inserted. That is, if an empty list is passed in, all values are
3910 3937 * removed.
3911 3938 */
3912 3939 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
3913 3940 rctl_dict_entry_t *rde;
3914 3941 rctl_hndl_t hndl;
3915 3942 char *name;
3916 3943 nvlist_t **nvlarray;
3917 3944 uint_t i, nelem;
3918 3945 int error; /* For ASSERT()s */
3919 3946
3920 3947 name = nvpair_name(nvp);
3921 3948 hndl = rctl_hndl_lookup(name);
3922 3949 ASSERT(hndl != -1);
3923 3950 rde = rctl_dict_lookup_hndl(hndl);
3924 3951 ASSERT(rde != NULL);
3925 3952
3926 3953 for (; /* ever */; ) {
3927 3954 rctl_val_t oval;
3928 3955
3929 3956 mutex_enter(&pp->p_lock);
3930 3957 error = rctl_local_get(hndl, NULL, &oval, pp);
3931 3958 mutex_exit(&pp->p_lock);
3932 3959 ASSERT(error == 0); /* Can't fail for RCTL_FIRST */
3933 3960 ASSERT(oval.rcv_privilege != RCPRIV_BASIC);
3934 3961 if (oval.rcv_privilege == RCPRIV_SYSTEM)
3935 3962 break;
3936 3963 mutex_enter(&pp->p_lock);
3937 3964 error = rctl_local_delete(hndl, &oval, pp);
3938 3965 mutex_exit(&pp->p_lock);
3939 3966 ASSERT(error == 0);
3940 3967 }
3941 3968 error = nvpair_value_nvlist_array(nvp, &nvlarray, &nelem);
3942 3969 ASSERT(error == 0);
3943 3970 for (i = 0; i < nelem; i++) {
3944 3971 rctl_val_t *nvalp;
3945 3972
3946 3973 nvalp = kmem_cache_alloc(rctl_val_cache, KM_SLEEP);
3947 3974 error = nvlist2rctlval(nvlarray[i], nvalp);
3948 3975 ASSERT(error == 0);
|
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1441 lines elided |
↑ open up ↑ |
3949 3976 /*
3950 3977 * rctl_local_insert can fail if the value being
3951 3978 * inserted is a duplicate; this is OK.
3952 3979 */
3953 3980 mutex_enter(&pp->p_lock);
3954 3981 if (rctl_local_insert(hndl, nvalp, pp) != 0)
3955 3982 kmem_cache_free(rctl_val_cache, nvalp);
3956 3983 mutex_exit(&pp->p_lock);
3957 3984 }
3958 3985 }
3986 +
3959 3987 /*
3960 3988 * Tell the world that we're done setting up.
3961 3989 *
3962 3990 * At this point we want to set the zone status to ZONE_IS_INITIALIZED
3963 3991 * and atomically set the zone's processor set visibility. Once
3964 3992 * we drop pool_lock() this zone will automatically get updated
3965 3993 * to reflect any future changes to the pools configuration.
3966 3994 *
3967 3995 * Note that after we drop the locks below (zonehash_lock in
3968 3996 * particular) other operations such as a zone_getattr call can
3969 3997 * now proceed and observe the zone. That is the reason for doing a
3970 3998 * state transition to the INITIALIZED state.
3971 3999 */
3972 4000 pool_lock();
3973 4001 mutex_enter(&cpu_lock);
3974 4002 mutex_enter(&zonehash_lock);
3975 4003 zone_uniqid(zone);
3976 4004 zone_zsd_configure(zone);
3977 4005 if (pool_state == POOL_ENABLED)
3978 4006 zone_pset_set(zone, pool_default->pool_pset->pset_id);
3979 4007 mutex_enter(&zone_status_lock);
3980 4008 ASSERT(zone_status_get(zone) == ZONE_IS_UNINITIALIZED);
3981 4009 zone_status_set(zone, ZONE_IS_INITIALIZED);
3982 4010 mutex_exit(&zone_status_lock);
3983 4011 mutex_exit(&zonehash_lock);
3984 4012 mutex_exit(&cpu_lock);
3985 4013 pool_unlock();
3986 4014
3987 4015 /* Now call the create callback for this key */
3988 4016 zsd_apply_all_keys(zsd_apply_create, zone);
3989 4017
3990 4018 /* The callbacks are complete. Mark ZONE_IS_READY */
3991 4019 mutex_enter(&zone_status_lock);
3992 4020 ASSERT(zone_status_get(zone) == ZONE_IS_INITIALIZED);
3993 4021 zone_status_set(zone, ZONE_IS_READY);
3994 4022 mutex_exit(&zone_status_lock);
3995 4023
3996 4024 /*
3997 4025 * Once we see the zone transition to the ZONE_IS_BOOTING state,
3998 4026 * we launch init, and set the state to running.
3999 4027 */
4000 4028 zone_status_wait_cpr(zone, ZONE_IS_BOOTING, "zsched");
4001 4029
4002 4030 if (zone_status_get(zone) == ZONE_IS_BOOTING) {
4003 4031 id_t cid;
4004 4032
4005 4033 /*
4006 4034 * Ok, this is a little complicated. We need to grab the
4007 4035 * zone's pool's scheduling class ID; note that by now, we
4008 4036 * are already bound to a pool if we need to be (zoneadmd
4009 4037 * will have done that to us while we're in the READY
4010 4038 * state). *But* the scheduling class for the zone's 'init'
4011 4039 * must be explicitly passed to newproc, which doesn't
4012 4040 * respect pool bindings.
4013 4041 *
4014 4042 * We hold the pool_lock across the call to newproc() to
4015 4043 * close the obvious race: the pool's scheduling class
4016 4044 * could change before we manage to create the LWP with
4017 4045 * classid 'cid'.
4018 4046 */
4019 4047 pool_lock();
4020 4048 if (zone->zone_defaultcid > 0)
4021 4049 cid = zone->zone_defaultcid;
4022 4050 else
4023 4051 cid = pool_get_class(zone->zone_pool);
4024 4052 if (cid == -1)
4025 4053 cid = defaultcid;
4026 4054
4027 4055 /*
4028 4056 * If this fails, zone_boot will ultimately fail. The
4029 4057 * state of the zone will be set to SHUTTING_DOWN-- userland
4030 4058 * will have to tear down the zone, and fail, or try again.
4031 4059 */
4032 4060 if ((zone->zone_boot_err = newproc(zone_start_init, NULL, cid,
4033 4061 minclsyspri - 1, &ct, 0)) != 0) {
4034 4062 mutex_enter(&zone_status_lock);
4035 4063 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN);
4036 4064 mutex_exit(&zone_status_lock);
4037 4065 } else {
4038 4066 zone->zone_boot_time = gethrestime_sec();
4039 4067 }
4040 4068
4041 4069 pool_unlock();
4042 4070 }
4043 4071
4044 4072 /*
4045 4073 * Wait for zone_destroy() to be called. This is what we spend
4046 4074 * most of our life doing.
4047 4075 */
4048 4076 zone_status_wait_cpr(zone, ZONE_IS_DYING, "zsched");
4049 4077
4050 4078 if (ct)
4051 4079 /*
4052 4080 * At this point the process contract should be empty.
4053 4081 * (Though if it isn't, it's not the end of the world.)
4054 4082 */
4055 4083 VERIFY(contract_abandon(ct, curproc, B_TRUE) == 0);
4056 4084
4057 4085 /*
4058 4086 * Allow kcred to be freed when all referring processes
4059 4087 * (including this one) go away. We can't just do this in
4060 4088 * zone_free because we need to wait for the zone_cred_ref to
4061 4089 * drop to 0 before calling zone_free, and the existence of
4062 4090 * zone_kcred will prevent that. Thus, we call crfree here to
4063 4091 * balance the crdup in zone_create. The crhold calls earlier
4064 4092 * in zsched will be dropped when the thread and process exit.
4065 4093 */
4066 4094 crfree(zone->zone_kcred);
4067 4095 zone->zone_kcred = NULL;
4068 4096
4069 4097 exit(CLD_EXITED, 0);
4070 4098 }
4071 4099
4072 4100 /*
4073 4101 * Helper function to determine if there are any submounts of the
4074 4102 * provided path. Used to make sure the zone doesn't "inherit" any
4075 4103 * mounts from before it is created.
4076 4104 */
4077 4105 static uint_t
4078 4106 zone_mount_count(const char *rootpath)
4079 4107 {
4080 4108 vfs_t *vfsp;
4081 4109 uint_t count = 0;
4082 4110 size_t rootpathlen = strlen(rootpath);
4083 4111
4084 4112 /*
4085 4113 * Holding zonehash_lock prevents race conditions with
4086 4114 * vfs_list_add()/vfs_list_remove() since we serialize with
4087 4115 * zone_find_by_path().
4088 4116 */
4089 4117 ASSERT(MUTEX_HELD(&zonehash_lock));
4090 4118 /*
4091 4119 * The rootpath must end with a '/'
4092 4120 */
4093 4121 ASSERT(rootpath[rootpathlen - 1] == '/');
4094 4122
4095 4123 /*
4096 4124 * This intentionally does not count the rootpath itself if that
4097 4125 * happens to be a mount point.
4098 4126 */
4099 4127 vfs_list_read_lock();
4100 4128 vfsp = rootvfs;
4101 4129 do {
4102 4130 if (strncmp(rootpath, refstr_value(vfsp->vfs_mntpt),
4103 4131 rootpathlen) == 0)
4104 4132 count++;
4105 4133 vfsp = vfsp->vfs_next;
4106 4134 } while (vfsp != rootvfs);
4107 4135 vfs_list_unlock();
4108 4136 return (count);
4109 4137 }
4110 4138
4111 4139 /*
4112 4140 * Helper function to make sure that a zone created on 'rootpath'
4113 4141 * wouldn't end up containing other zones' rootpaths.
4114 4142 */
4115 4143 static boolean_t
4116 4144 zone_is_nested(const char *rootpath)
4117 4145 {
4118 4146 zone_t *zone;
4119 4147 size_t rootpathlen = strlen(rootpath);
4120 4148 size_t len;
4121 4149
4122 4150 ASSERT(MUTEX_HELD(&zonehash_lock));
4123 4151
4124 4152 /*
4125 4153 * zone_set_root() appended '/' and '\0' at the end of rootpath
4126 4154 */
4127 4155 if ((rootpathlen <= 3) && (rootpath[0] == '/') &&
4128 4156 (rootpath[1] == '/') && (rootpath[2] == '\0'))
4129 4157 return (B_TRUE);
4130 4158
4131 4159 for (zone = list_head(&zone_active); zone != NULL;
4132 4160 zone = list_next(&zone_active, zone)) {
4133 4161 if (zone == global_zone)
4134 4162 continue;
4135 4163 len = strlen(zone->zone_rootpath);
4136 4164 if (strncmp(rootpath, zone->zone_rootpath,
4137 4165 MIN(rootpathlen, len)) == 0)
4138 4166 return (B_TRUE);
4139 4167 }
4140 4168 return (B_FALSE);
4141 4169 }
4142 4170
4143 4171 static int
4144 4172 zone_set_privset(zone_t *zone, const priv_set_t *zone_privs,
4145 4173 size_t zone_privssz)
4146 4174 {
4147 4175 priv_set_t *privs;
4148 4176
4149 4177 if (zone_privssz < sizeof (priv_set_t))
4150 4178 return (ENOMEM);
4151 4179
4152 4180 privs = kmem_alloc(sizeof (priv_set_t), KM_SLEEP);
4153 4181
4154 4182 if (copyin(zone_privs, privs, sizeof (priv_set_t))) {
4155 4183 kmem_free(privs, sizeof (priv_set_t));
4156 4184 return (EFAULT);
4157 4185 }
4158 4186
4159 4187 zone->zone_privset = privs;
4160 4188 return (0);
4161 4189 }
4162 4190
4163 4191 /*
4164 4192 * We make creative use of nvlists to pass in rctls from userland. The list is
4165 4193 * a list of the following structures:
4166 4194 *
4167 4195 * (name = rctl_name, value = nvpair_list_array)
4168 4196 *
4169 4197 * Where each element of the nvpair_list_array is of the form:
4170 4198 *
4171 4199 * [(name = "privilege", value = RCPRIV_PRIVILEGED),
4172 4200 * (name = "limit", value = uint64_t),
4173 4201 * (name = "action", value = (RCTL_LOCAL_NOACTION || RCTL_LOCAL_DENY))]
4174 4202 */
4175 4203 static int
4176 4204 parse_rctls(caddr_t ubuf, size_t buflen, nvlist_t **nvlp)
4177 4205 {
4178 4206 nvpair_t *nvp = NULL;
4179 4207 nvlist_t *nvl = NULL;
4180 4208 char *kbuf;
4181 4209 int error;
4182 4210 rctl_val_t rv;
4183 4211
4184 4212 *nvlp = NULL;
4185 4213
4186 4214 if (buflen == 0)
4187 4215 return (0);
4188 4216
4189 4217 if ((kbuf = kmem_alloc(buflen, KM_NOSLEEP)) == NULL)
4190 4218 return (ENOMEM);
4191 4219 if (copyin(ubuf, kbuf, buflen)) {
4192 4220 error = EFAULT;
4193 4221 goto out;
4194 4222 }
4195 4223 if (nvlist_unpack(kbuf, buflen, &nvl, KM_SLEEP) != 0) {
4196 4224 /*
4197 4225 * nvl may have been allocated/free'd, but the value set to
4198 4226 * non-NULL, so we reset it here.
4199 4227 */
4200 4228 nvl = NULL;
4201 4229 error = EINVAL;
4202 4230 goto out;
4203 4231 }
4204 4232 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4205 4233 rctl_dict_entry_t *rde;
4206 4234 rctl_hndl_t hndl;
4207 4235 nvlist_t **nvlarray;
4208 4236 uint_t i, nelem;
4209 4237 char *name;
4210 4238
4211 4239 error = EINVAL;
4212 4240 name = nvpair_name(nvp);
4213 4241 if (strncmp(nvpair_name(nvp), "zone.", sizeof ("zone.") - 1)
4214 4242 != 0 || nvpair_type(nvp) != DATA_TYPE_NVLIST_ARRAY) {
4215 4243 goto out;
4216 4244 }
4217 4245 if ((hndl = rctl_hndl_lookup(name)) == -1) {
4218 4246 goto out;
4219 4247 }
4220 4248 rde = rctl_dict_lookup_hndl(hndl);
4221 4249 error = nvpair_value_nvlist_array(nvp, &nvlarray, &nelem);
4222 4250 ASSERT(error == 0);
4223 4251 for (i = 0; i < nelem; i++) {
4224 4252 if (error = nvlist2rctlval(nvlarray[i], &rv))
4225 4253 goto out;
4226 4254 }
4227 4255 if (rctl_invalid_value(rde, &rv)) {
4228 4256 error = EINVAL;
4229 4257 goto out;
4230 4258 }
4231 4259 }
|
↓ open down ↓ |
263 lines elided |
↑ open up ↑ |
4232 4260 error = 0;
4233 4261 *nvlp = nvl;
4234 4262 out:
4235 4263 kmem_free(kbuf, buflen);
4236 4264 if (error && nvl != NULL)
4237 4265 nvlist_free(nvl);
4238 4266 return (error);
4239 4267 }
4240 4268
4241 4269 int
4242 -zone_create_error(int er_error, int er_ext, int *er_out) {
4270 +zone_create_error(int er_error, int er_ext, int *er_out)
4271 +{
4243 4272 if (er_out != NULL) {
4244 4273 if (copyout(&er_ext, er_out, sizeof (int))) {
4245 4274 return (set_errno(EFAULT));
4246 4275 }
4247 4276 }
4248 4277 return (set_errno(er_error));
4249 4278 }
4250 4279
4251 4280 static int
4252 4281 zone_set_label(zone_t *zone, const bslabel_t *lab, uint32_t doi)
4253 4282 {
4254 4283 ts_label_t *tsl;
4255 4284 bslabel_t blab;
4256 4285
4257 4286 /* Get label from user */
4258 4287 if (copyin(lab, &blab, sizeof (blab)) != 0)
4259 4288 return (EFAULT);
4260 4289 tsl = labelalloc(&blab, doi, KM_NOSLEEP);
4261 4290 if (tsl == NULL)
4262 4291 return (ENOMEM);
4263 4292
4264 4293 zone->zone_slabel = tsl;
4265 4294 return (0);
4266 4295 }
4267 4296
4268 4297 /*
4269 4298 * Parses a comma-separated list of ZFS datasets into a per-zone dictionary.
4270 4299 */
4271 4300 static int
4272 4301 parse_zfs(zone_t *zone, caddr_t ubuf, size_t buflen)
4273 4302 {
4274 4303 char *kbuf;
4275 4304 char *dataset, *next;
4276 4305 zone_dataset_t *zd;
4277 4306 size_t len;
4278 4307
4279 4308 if (ubuf == NULL || buflen == 0)
4280 4309 return (0);
4281 4310
4282 4311 if ((kbuf = kmem_alloc(buflen, KM_NOSLEEP)) == NULL)
4283 4312 return (ENOMEM);
4284 4313
4285 4314 if (copyin(ubuf, kbuf, buflen) != 0) {
4286 4315 kmem_free(kbuf, buflen);
4287 4316 return (EFAULT);
4288 4317 }
4289 4318
4290 4319 dataset = next = kbuf;
4291 4320 for (;;) {
4292 4321 zd = kmem_alloc(sizeof (zone_dataset_t), KM_SLEEP);
4293 4322
4294 4323 next = strchr(dataset, ',');
4295 4324
4296 4325 if (next == NULL)
4297 4326 len = strlen(dataset);
4298 4327 else
4299 4328 len = next - dataset;
4300 4329
4301 4330 zd->zd_dataset = kmem_alloc(len + 1, KM_SLEEP);
4302 4331 bcopy(dataset, zd->zd_dataset, len);
4303 4332 zd->zd_dataset[len] = '\0';
4304 4333
4305 4334 list_insert_head(&zone->zone_datasets, zd);
4306 4335
4307 4336 if (next == NULL)
4308 4337 break;
4309 4338
4310 4339 dataset = next + 1;
4311 4340 }
4312 4341
4313 4342 kmem_free(kbuf, buflen);
4314 4343 return (0);
4315 4344 }
4316 4345
4317 4346 /*
4318 4347 * System call to create/initialize a new zone named 'zone_name', rooted
4319 4348 * at 'zone_root', with a zone-wide privilege limit set of 'zone_privs',
4320 4349 * and initialized with the zone-wide rctls described in 'rctlbuf', and
4321 4350 * with labeling set by 'match', 'doi', and 'label'.
4322 4351 *
4323 4352 * If extended error is non-null, we may use it to return more detailed
4324 4353 * error information.
4325 4354 */
4326 4355 static zoneid_t
4327 4356 zone_create(const char *zone_name, const char *zone_root,
4328 4357 const priv_set_t *zone_privs, size_t zone_privssz,
4329 4358 caddr_t rctlbuf, size_t rctlbufsz,
4330 4359 caddr_t zfsbuf, size_t zfsbufsz, int *extended_error,
4331 4360 int match, uint32_t doi, const bslabel_t *label,
4332 4361 int flags)
4333 4362 {
4334 4363 struct zsched_arg zarg;
4335 4364 nvlist_t *rctls = NULL;
4336 4365 proc_t *pp = curproc;
4337 4366 zone_t *zone, *ztmp;
4338 4367 zoneid_t zoneid;
4339 4368 int error;
4340 4369 int error2 = 0;
4341 4370 char *str;
4342 4371 cred_t *zkcr;
4343 4372 boolean_t insert_label_hash;
4344 4373
4345 4374 if (secpolicy_zone_config(CRED()) != 0)
4346 4375 return (set_errno(EPERM));
4347 4376
4348 4377 /* can't boot zone from within chroot environment */
4349 4378 if (PTOU(pp)->u_rdir != NULL && PTOU(pp)->u_rdir != rootdir)
4350 4379 return (zone_create_error(ENOTSUP, ZE_CHROOTED,
4351 4380 extended_error));
4352 4381
4353 4382 zone = kmem_zalloc(sizeof (zone_t), KM_SLEEP);
4354 4383 zoneid = zone->zone_id = id_alloc(zoneid_space);
4355 4384 zone->zone_status = ZONE_IS_UNINITIALIZED;
4356 4385 zone->zone_pool = pool_default;
4357 4386 zone->zone_pool_mod = gethrtime();
4358 4387 zone->zone_psetid = ZONE_PS_INVAL;
4359 4388 zone->zone_ncpus = 0;
4360 4389 zone->zone_ncpus_online = 0;
4361 4390 zone->zone_restart_init = B_TRUE;
4362 4391 zone->zone_brand = &native_brand;
4363 4392 zone->zone_initname = NULL;
4364 4393 mutex_init(&zone->zone_lock, NULL, MUTEX_DEFAULT, NULL);
4365 4394 mutex_init(&zone->zone_nlwps_lock, NULL, MUTEX_DEFAULT, NULL);
4366 4395 mutex_init(&zone->zone_mem_lock, NULL, MUTEX_DEFAULT, NULL);
4367 4396 cv_init(&zone->zone_cv, NULL, CV_DEFAULT, NULL);
4368 4397 list_create(&zone->zone_ref_list, sizeof (zone_ref_t),
4369 4398 offsetof(zone_ref_t, zref_linkage));
4370 4399 list_create(&zone->zone_zsd, sizeof (struct zsd_entry),
4371 4400 offsetof(struct zsd_entry, zsd_linkage));
4372 4401 list_create(&zone->zone_datasets, sizeof (zone_dataset_t),
4373 4402 offsetof(zone_dataset_t, zd_linkage));
4374 4403 list_create(&zone->zone_dl_list, sizeof (zone_dl_t),
4375 4404 offsetof(zone_dl_t, zdl_linkage));
4376 4405 rw_init(&zone->zone_mlps.mlpl_rwlock, NULL, RW_DEFAULT, NULL);
4377 4406 rw_init(&zone->zone_mntfs_db_lock, NULL, RW_DEFAULT, NULL);
4378 4407
4379 4408 if (flags & ZCF_NET_EXCL) {
4380 4409 zone->zone_flags |= ZF_NET_EXCL;
4381 4410 }
4382 4411
4383 4412 if ((error = zone_set_name(zone, zone_name)) != 0) {
4384 4413 zone_free(zone);
4385 4414 return (zone_create_error(error, 0, extended_error));
4386 4415 }
4387 4416
4388 4417 if ((error = zone_set_root(zone, zone_root)) != 0) {
4389 4418 zone_free(zone);
4390 4419 return (zone_create_error(error, 0, extended_error));
4391 4420 }
4392 4421 if ((error = zone_set_privset(zone, zone_privs, zone_privssz)) != 0) {
4393 4422 zone_free(zone);
4394 4423 return (zone_create_error(error, 0, extended_error));
4395 4424 }
4396 4425
4397 4426 /* initialize node name to be the same as zone name */
4398 4427 zone->zone_nodename = kmem_alloc(_SYS_NMLN, KM_SLEEP);
4399 4428 (void) strncpy(zone->zone_nodename, zone->zone_name, _SYS_NMLN);
4400 4429 zone->zone_nodename[_SYS_NMLN - 1] = '\0';
4401 4430
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4402 4431 zone->zone_domain = kmem_alloc(_SYS_NMLN, KM_SLEEP);
4403 4432 zone->zone_domain[0] = '\0';
4404 4433 zone->zone_hostid = HW_INVALID_HOSTID;
4405 4434 zone->zone_shares = 1;
4406 4435 zone->zone_shmmax = 0;
4407 4436 zone->zone_ipc.ipcq_shmmni = 0;
4408 4437 zone->zone_ipc.ipcq_semmni = 0;
4409 4438 zone->zone_ipc.ipcq_msgmni = 0;
4410 4439 zone->zone_bootargs = NULL;
4411 4440 zone->zone_fs_allowed = NULL;
4441 +
4442 + secflags_zero(&zone0.zone_secflags.psf_lower);
4443 + secflags_zero(&zone0.zone_secflags.psf_effective);
4444 + secflags_zero(&zone0.zone_secflags.psf_inherit);
4445 + secflags_fullset(&zone0.zone_secflags.psf_upper);
4446 +
4412 4447 zone->zone_initname =
4413 4448 kmem_alloc(strlen(zone_default_initname) + 1, KM_SLEEP);
4414 4449 (void) strcpy(zone->zone_initname, zone_default_initname);
4415 4450 zone->zone_nlwps = 0;
4416 4451 zone->zone_nlwps_ctl = INT_MAX;
4417 4452 zone->zone_nprocs = 0;
4418 4453 zone->zone_nprocs_ctl = INT_MAX;
4419 4454 zone->zone_locked_mem = 0;
4420 4455 zone->zone_locked_mem_ctl = UINT64_MAX;
4421 4456 zone->zone_max_swap = 0;
4422 4457 zone->zone_max_swap_ctl = UINT64_MAX;
4423 4458 zone->zone_max_lofi = 0;
4424 4459 zone->zone_max_lofi_ctl = UINT64_MAX;
4425 4460 zone0.zone_lockedmem_kstat = NULL;
4426 4461 zone0.zone_swapresv_kstat = NULL;
4427 4462
4428 4463 /*
4429 4464 * Zsched initializes the rctls.
4430 4465 */
4431 4466 zone->zone_rctls = NULL;
4432 4467
4433 4468 if ((error = parse_rctls(rctlbuf, rctlbufsz, &rctls)) != 0) {
4434 4469 zone_free(zone);
4435 4470 return (zone_create_error(error, 0, extended_error));
4436 4471 }
4437 4472
4438 4473 if ((error = parse_zfs(zone, zfsbuf, zfsbufsz)) != 0) {
4439 4474 zone_free(zone);
4440 4475 return (set_errno(error));
4441 4476 }
4442 4477
4443 4478 /*
4444 4479 * Read in the trusted system parameters:
4445 4480 * match flag and sensitivity label.
4446 4481 */
4447 4482 zone->zone_match = match;
4448 4483 if (is_system_labeled() && !(zone->zone_flags & ZF_IS_SCRATCH)) {
4449 4484 /* Fail if requested to set doi to anything but system's doi */
4450 4485 if (doi != 0 && doi != default_doi) {
4451 4486 zone_free(zone);
4452 4487 return (set_errno(EINVAL));
4453 4488 }
4454 4489 /* Always apply system's doi to the zone */
4455 4490 error = zone_set_label(zone, label, default_doi);
4456 4491 if (error != 0) {
4457 4492 zone_free(zone);
4458 4493 return (set_errno(error));
4459 4494 }
4460 4495 insert_label_hash = B_TRUE;
4461 4496 } else {
4462 4497 /* all zones get an admin_low label if system is not labeled */
4463 4498 zone->zone_slabel = l_admin_low;
4464 4499 label_hold(l_admin_low);
4465 4500 insert_label_hash = B_FALSE;
4466 4501 }
4467 4502
4468 4503 /*
4469 4504 * Stop all lwps since that's what normally happens as part of fork().
4470 4505 * This needs to happen before we grab any locks to avoid deadlock
4471 4506 * (another lwp in the process could be waiting for the held lock).
4472 4507 */
4473 4508 if (curthread != pp->p_agenttp && !holdlwps(SHOLDFORK)) {
4474 4509 zone_free(zone);
4475 4510 nvlist_free(rctls);
4476 4511 return (zone_create_error(error, 0, extended_error));
4477 4512 }
4478 4513
4479 4514 if (block_mounts(zone) == 0) {
4480 4515 mutex_enter(&pp->p_lock);
4481 4516 if (curthread != pp->p_agenttp)
4482 4517 continuelwps(pp);
4483 4518 mutex_exit(&pp->p_lock);
4484 4519 zone_free(zone);
4485 4520 nvlist_free(rctls);
4486 4521 return (zone_create_error(error, 0, extended_error));
4487 4522 }
4488 4523
4489 4524 /*
4490 4525 * Set up credential for kernel access. After this, any errors
4491 4526 * should go through the dance in errout rather than calling
4492 4527 * zone_free directly.
4493 4528 */
4494 4529 zone->zone_kcred = crdup(kcred);
4495 4530 crsetzone(zone->zone_kcred, zone);
4496 4531 priv_intersect(zone->zone_privset, &CR_PPRIV(zone->zone_kcred));
4497 4532 priv_intersect(zone->zone_privset, &CR_EPRIV(zone->zone_kcred));
4498 4533 priv_intersect(zone->zone_privset, &CR_IPRIV(zone->zone_kcred));
4499 4534 priv_intersect(zone->zone_privset, &CR_LPRIV(zone->zone_kcred));
4500 4535
4501 4536 mutex_enter(&zonehash_lock);
4502 4537 /*
4503 4538 * Make sure zone doesn't already exist.
4504 4539 *
4505 4540 * If the system and zone are labeled,
4506 4541 * make sure no other zone exists that has the same label.
4507 4542 */
4508 4543 if ((ztmp = zone_find_all_by_name(zone->zone_name)) != NULL ||
4509 4544 (insert_label_hash &&
4510 4545 (ztmp = zone_find_all_by_label(zone->zone_slabel)) != NULL)) {
4511 4546 zone_status_t status;
4512 4547
4513 4548 status = zone_status_get(ztmp);
4514 4549 if (status == ZONE_IS_READY || status == ZONE_IS_RUNNING)
4515 4550 error = EEXIST;
4516 4551 else
4517 4552 error = EBUSY;
4518 4553
4519 4554 if (insert_label_hash)
4520 4555 error2 = ZE_LABELINUSE;
4521 4556
4522 4557 goto errout;
4523 4558 }
4524 4559
4525 4560 /*
4526 4561 * Don't allow zone creations which would cause one zone's rootpath to
4527 4562 * be accessible from that of another (non-global) zone.
4528 4563 */
4529 4564 if (zone_is_nested(zone->zone_rootpath)) {
4530 4565 error = EBUSY;
4531 4566 goto errout;
4532 4567 }
4533 4568
4534 4569 ASSERT(zonecount != 0); /* check for leaks */
4535 4570 if (zonecount + 1 > maxzones) {
4536 4571 error = ENOMEM;
4537 4572 goto errout;
4538 4573 }
4539 4574
4540 4575 if (zone_mount_count(zone->zone_rootpath) != 0) {
4541 4576 error = EBUSY;
4542 4577 error2 = ZE_AREMOUNTS;
4543 4578 goto errout;
4544 4579 }
4545 4580
4546 4581 /*
4547 4582 * Zone is still incomplete, but we need to drop all locks while
4548 4583 * zsched() initializes this zone's kernel process. We
4549 4584 * optimistically add the zone to the hashtable and associated
4550 4585 * lists so a parallel zone_create() doesn't try to create the
4551 4586 * same zone.
4552 4587 */
4553 4588 zonecount++;
4554 4589 (void) mod_hash_insert(zonehashbyid,
4555 4590 (mod_hash_key_t)(uintptr_t)zone->zone_id,
4556 4591 (mod_hash_val_t)(uintptr_t)zone);
4557 4592 str = kmem_alloc(strlen(zone->zone_name) + 1, KM_SLEEP);
4558 4593 (void) strcpy(str, zone->zone_name);
4559 4594 (void) mod_hash_insert(zonehashbyname, (mod_hash_key_t)str,
4560 4595 (mod_hash_val_t)(uintptr_t)zone);
4561 4596 if (insert_label_hash) {
4562 4597 (void) mod_hash_insert(zonehashbylabel,
4563 4598 (mod_hash_key_t)zone->zone_slabel, (mod_hash_val_t)zone);
4564 4599 zone->zone_flags |= ZF_HASHED_LABEL;
4565 4600 }
4566 4601
4567 4602 /*
4568 4603 * Insert into active list. At this point there are no 'hold's
4569 4604 * on the zone, but everyone else knows not to use it, so we can
4570 4605 * continue to use it. zsched() will do a zone_hold() if the
4571 4606 * newproc() is successful.
4572 4607 */
4573 4608 list_insert_tail(&zone_active, zone);
4574 4609 mutex_exit(&zonehash_lock);
4575 4610
4576 4611 zarg.zone = zone;
4577 4612 zarg.nvlist = rctls;
4578 4613 /*
4579 4614 * The process, task, and project rctls are probably wrong;
4580 4615 * we need an interface to get the default values of all rctls,
4581 4616 * and initialize zsched appropriately. I'm not sure that that
4582 4617 * makes much of a difference, though.
4583 4618 */
4584 4619 error = newproc(zsched, (void *)&zarg, syscid, minclsyspri, NULL, 0);
4585 4620 if (error != 0) {
4586 4621 /*
4587 4622 * We need to undo all globally visible state.
4588 4623 */
4589 4624 mutex_enter(&zonehash_lock);
4590 4625 list_remove(&zone_active, zone);
4591 4626 if (zone->zone_flags & ZF_HASHED_LABEL) {
4592 4627 ASSERT(zone->zone_slabel != NULL);
4593 4628 (void) mod_hash_destroy(zonehashbylabel,
4594 4629 (mod_hash_key_t)zone->zone_slabel);
4595 4630 }
4596 4631 (void) mod_hash_destroy(zonehashbyname,
4597 4632 (mod_hash_key_t)(uintptr_t)zone->zone_name);
4598 4633 (void) mod_hash_destroy(zonehashbyid,
4599 4634 (mod_hash_key_t)(uintptr_t)zone->zone_id);
4600 4635 ASSERT(zonecount > 1);
4601 4636 zonecount--;
4602 4637 goto errout;
4603 4638 }
4604 4639
4605 4640 /*
4606 4641 * Zone creation can't fail from now on.
4607 4642 */
4608 4643
4609 4644 /*
4610 4645 * Create zone kstats
4611 4646 */
4612 4647 zone_kstat_create(zone);
4613 4648
4614 4649 /*
4615 4650 * Let the other lwps continue.
4616 4651 */
4617 4652 mutex_enter(&pp->p_lock);
4618 4653 if (curthread != pp->p_agenttp)
4619 4654 continuelwps(pp);
4620 4655 mutex_exit(&pp->p_lock);
4621 4656
4622 4657 /*
4623 4658 * Wait for zsched to finish initializing the zone.
4624 4659 */
4625 4660 zone_status_wait(zone, ZONE_IS_READY);
4626 4661 /*
4627 4662 * The zone is fully visible, so we can let mounts progress.
4628 4663 */
4629 4664 resume_mounts(zone);
4630 4665 nvlist_free(rctls);
4631 4666
4632 4667 return (zoneid);
4633 4668
4634 4669 errout:
4635 4670 mutex_exit(&zonehash_lock);
4636 4671 /*
4637 4672 * Let the other lwps continue.
4638 4673 */
4639 4674 mutex_enter(&pp->p_lock);
4640 4675 if (curthread != pp->p_agenttp)
4641 4676 continuelwps(pp);
4642 4677 mutex_exit(&pp->p_lock);
4643 4678
4644 4679 resume_mounts(zone);
4645 4680 nvlist_free(rctls);
4646 4681 /*
4647 4682 * There is currently one reference to the zone, a cred_ref from
4648 4683 * zone_kcred. To free the zone, we call crfree, which will call
4649 4684 * zone_cred_rele, which will call zone_free.
4650 4685 */
4651 4686 ASSERT(zone->zone_cred_ref == 1);
4652 4687 ASSERT(zone->zone_kcred->cr_ref == 1);
4653 4688 ASSERT(zone->zone_ref == 0);
4654 4689 zkcr = zone->zone_kcred;
4655 4690 zone->zone_kcred = NULL;
4656 4691 crfree(zkcr); /* triggers call to zone_free */
4657 4692 return (zone_create_error(error, error2, extended_error));
4658 4693 }
4659 4694
4660 4695 /*
4661 4696 * Cause the zone to boot. This is pretty simple, since we let zoneadmd do
4662 4697 * the heavy lifting. initname is the path to the program to launch
4663 4698 * at the "top" of the zone; if this is NULL, we use the system default,
4664 4699 * which is stored at zone_default_initname.
4665 4700 */
4666 4701 static int
4667 4702 zone_boot(zoneid_t zoneid)
4668 4703 {
4669 4704 int err;
4670 4705 zone_t *zone;
4671 4706
4672 4707 if (secpolicy_zone_config(CRED()) != 0)
4673 4708 return (set_errno(EPERM));
4674 4709 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID)
4675 4710 return (set_errno(EINVAL));
4676 4711
4677 4712 mutex_enter(&zonehash_lock);
4678 4713 /*
4679 4714 * Look for zone under hash lock to prevent races with calls to
4680 4715 * zone_shutdown, zone_destroy, etc.
4681 4716 */
4682 4717 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
4683 4718 mutex_exit(&zonehash_lock);
4684 4719 return (set_errno(EINVAL));
4685 4720 }
4686 4721
4687 4722 mutex_enter(&zone_status_lock);
4688 4723 if (zone_status_get(zone) != ZONE_IS_READY) {
4689 4724 mutex_exit(&zone_status_lock);
4690 4725 mutex_exit(&zonehash_lock);
4691 4726 return (set_errno(EINVAL));
4692 4727 }
4693 4728 zone_status_set(zone, ZONE_IS_BOOTING);
4694 4729 mutex_exit(&zone_status_lock);
4695 4730
4696 4731 zone_hold(zone); /* so we can use the zone_t later */
4697 4732 mutex_exit(&zonehash_lock);
4698 4733
4699 4734 if (zone_status_wait_sig(zone, ZONE_IS_RUNNING) == 0) {
4700 4735 zone_rele(zone);
4701 4736 return (set_errno(EINTR));
4702 4737 }
4703 4738
4704 4739 /*
4705 4740 * Boot (starting init) might have failed, in which case the zone
4706 4741 * will go to the SHUTTING_DOWN state; an appropriate errno will
4707 4742 * be placed in zone->zone_boot_err, and so we return that.
4708 4743 */
4709 4744 err = zone->zone_boot_err;
4710 4745 zone_rele(zone);
4711 4746 return (err ? set_errno(err) : 0);
4712 4747 }
4713 4748
4714 4749 /*
4715 4750 * Kills all user processes in the zone, waiting for them all to exit
4716 4751 * before returning.
4717 4752 */
4718 4753 static int
4719 4754 zone_empty(zone_t *zone)
4720 4755 {
4721 4756 int waitstatus;
4722 4757
4723 4758 /*
4724 4759 * We need to drop zonehash_lock before killing all
4725 4760 * processes, otherwise we'll deadlock with zone_find_*
4726 4761 * which can be called from the exit path.
4727 4762 */
4728 4763 ASSERT(MUTEX_NOT_HELD(&zonehash_lock));
4729 4764 while ((waitstatus = zone_status_timedwait_sig(zone,
4730 4765 ddi_get_lbolt() + hz, ZONE_IS_EMPTY)) == -1) {
4731 4766 killall(zone->zone_id);
4732 4767 }
4733 4768 /*
4734 4769 * return EINTR if we were signaled
4735 4770 */
4736 4771 if (waitstatus == 0)
4737 4772 return (EINTR);
4738 4773 return (0);
4739 4774 }
4740 4775
4741 4776 /*
4742 4777 * This function implements the policy for zone visibility.
4743 4778 *
4744 4779 * In standard Solaris, a non-global zone can only see itself.
4745 4780 *
4746 4781 * In Trusted Extensions, a labeled zone can lookup any zone whose label
4747 4782 * it dominates. For this test, the label of the global zone is treated as
4748 4783 * admin_high so it is special-cased instead of being checked for dominance.
4749 4784 *
4750 4785 * Returns true if zone attributes are viewable, false otherwise.
4751 4786 */
4752 4787 static boolean_t
4753 4788 zone_list_access(zone_t *zone)
4754 4789 {
4755 4790
4756 4791 if (curproc->p_zone == global_zone ||
4757 4792 curproc->p_zone == zone) {
4758 4793 return (B_TRUE);
4759 4794 } else if (is_system_labeled() && !(zone->zone_flags & ZF_IS_SCRATCH)) {
4760 4795 bslabel_t *curproc_label;
4761 4796 bslabel_t *zone_label;
4762 4797
4763 4798 curproc_label = label2bslabel(curproc->p_zone->zone_slabel);
4764 4799 zone_label = label2bslabel(zone->zone_slabel);
4765 4800
4766 4801 if (zone->zone_id != GLOBAL_ZONEID &&
4767 4802 bldominates(curproc_label, zone_label)) {
4768 4803 return (B_TRUE);
4769 4804 } else {
4770 4805 return (B_FALSE);
4771 4806 }
4772 4807 } else {
4773 4808 return (B_FALSE);
4774 4809 }
4775 4810 }
4776 4811
4777 4812 /*
4778 4813 * Systemcall to start the zone's halt sequence. By the time this
4779 4814 * function successfully returns, all user processes and kernel threads
4780 4815 * executing in it will have exited, ZSD shutdown callbacks executed,
4781 4816 * and the zone status set to ZONE_IS_DOWN.
4782 4817 *
4783 4818 * It is possible that the call will interrupt itself if the caller is the
4784 4819 * parent of any process running in the zone, and doesn't have SIGCHLD blocked.
4785 4820 */
4786 4821 static int
4787 4822 zone_shutdown(zoneid_t zoneid)
4788 4823 {
4789 4824 int error;
4790 4825 zone_t *zone;
4791 4826 zone_status_t status;
4792 4827
4793 4828 if (secpolicy_zone_config(CRED()) != 0)
4794 4829 return (set_errno(EPERM));
4795 4830 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID)
4796 4831 return (set_errno(EINVAL));
4797 4832
4798 4833 mutex_enter(&zonehash_lock);
4799 4834 /*
4800 4835 * Look for zone under hash lock to prevent races with other
4801 4836 * calls to zone_shutdown and zone_destroy.
4802 4837 */
4803 4838 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
4804 4839 mutex_exit(&zonehash_lock);
4805 4840 return (set_errno(EINVAL));
4806 4841 }
4807 4842
4808 4843 /*
4809 4844 * We have to drop zonehash_lock before calling block_mounts.
4810 4845 * Hold the zone so we can continue to use the zone_t.
4811 4846 */
4812 4847 zone_hold(zone);
4813 4848 mutex_exit(&zonehash_lock);
4814 4849
4815 4850 /*
4816 4851 * Block mounts so that VFS_MOUNT() can get an accurate view of
4817 4852 * the zone's status with regards to ZONE_IS_SHUTTING down.
4818 4853 *
4819 4854 * e.g. NFS can fail the mount if it determines that the zone
4820 4855 * has already begun the shutdown sequence.
4821 4856 *
4822 4857 */
4823 4858 if (block_mounts(zone) == 0) {
4824 4859 zone_rele(zone);
4825 4860 return (set_errno(EINTR));
4826 4861 }
4827 4862
4828 4863 mutex_enter(&zonehash_lock);
4829 4864 mutex_enter(&zone_status_lock);
4830 4865 status = zone_status_get(zone);
4831 4866 /*
4832 4867 * Fail if the zone isn't fully initialized yet.
4833 4868 */
4834 4869 if (status < ZONE_IS_READY) {
4835 4870 mutex_exit(&zone_status_lock);
4836 4871 mutex_exit(&zonehash_lock);
4837 4872 resume_mounts(zone);
4838 4873 zone_rele(zone);
4839 4874 return (set_errno(EINVAL));
4840 4875 }
4841 4876 /*
4842 4877 * If conditions required for zone_shutdown() to return have been met,
4843 4878 * return success.
4844 4879 */
4845 4880 if (status >= ZONE_IS_DOWN) {
4846 4881 mutex_exit(&zone_status_lock);
4847 4882 mutex_exit(&zonehash_lock);
4848 4883 resume_mounts(zone);
4849 4884 zone_rele(zone);
4850 4885 return (0);
4851 4886 }
4852 4887 /*
4853 4888 * If zone_shutdown() hasn't been called before, go through the motions.
4854 4889 * If it has, there's nothing to do but wait for the kernel threads to
4855 4890 * drain.
4856 4891 */
4857 4892 if (status < ZONE_IS_EMPTY) {
4858 4893 uint_t ntasks;
4859 4894
4860 4895 mutex_enter(&zone->zone_lock);
4861 4896 if ((ntasks = zone->zone_ntasks) != 1) {
4862 4897 /*
4863 4898 * There's still stuff running.
4864 4899 */
4865 4900 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN);
4866 4901 }
4867 4902 mutex_exit(&zone->zone_lock);
4868 4903 if (ntasks == 1) {
4869 4904 /*
4870 4905 * The only way to create another task is through
4871 4906 * zone_enter(), which will block until we drop
4872 4907 * zonehash_lock. The zone is empty.
4873 4908 */
4874 4909 if (zone->zone_kthreads == NULL) {
4875 4910 /*
4876 4911 * Skip ahead to ZONE_IS_DOWN
4877 4912 */
4878 4913 zone_status_set(zone, ZONE_IS_DOWN);
4879 4914 } else {
4880 4915 zone_status_set(zone, ZONE_IS_EMPTY);
4881 4916 }
4882 4917 }
4883 4918 }
4884 4919 mutex_exit(&zone_status_lock);
4885 4920 mutex_exit(&zonehash_lock);
4886 4921 resume_mounts(zone);
4887 4922
4888 4923 if (error = zone_empty(zone)) {
4889 4924 zone_rele(zone);
4890 4925 return (set_errno(error));
4891 4926 }
4892 4927 /*
4893 4928 * After the zone status goes to ZONE_IS_DOWN this zone will no
4894 4929 * longer be notified of changes to the pools configuration, so
4895 4930 * in order to not end up with a stale pool pointer, we point
4896 4931 * ourselves at the default pool and remove all resource
4897 4932 * visibility. This is especially important as the zone_t may
4898 4933 * languish on the deathrow for a very long time waiting for
4899 4934 * cred's to drain out.
4900 4935 *
4901 4936 * This rebinding of the zone can happen multiple times
4902 4937 * (presumably due to interrupted or parallel systemcalls)
4903 4938 * without any adverse effects.
4904 4939 */
4905 4940 if (pool_lock_intr() != 0) {
4906 4941 zone_rele(zone);
4907 4942 return (set_errno(EINTR));
4908 4943 }
4909 4944 if (pool_state == POOL_ENABLED) {
4910 4945 mutex_enter(&cpu_lock);
4911 4946 zone_pool_set(zone, pool_default);
4912 4947 /*
4913 4948 * The zone no longer needs to be able to see any cpus.
4914 4949 */
4915 4950 zone_pset_set(zone, ZONE_PS_INVAL);
4916 4951 mutex_exit(&cpu_lock);
4917 4952 }
4918 4953 pool_unlock();
4919 4954
4920 4955 /*
4921 4956 * ZSD shutdown callbacks can be executed multiple times, hence
4922 4957 * it is safe to not be holding any locks across this call.
4923 4958 */
4924 4959 zone_zsd_callbacks(zone, ZSD_SHUTDOWN);
4925 4960
4926 4961 mutex_enter(&zone_status_lock);
4927 4962 if (zone->zone_kthreads == NULL && zone_status_get(zone) < ZONE_IS_DOWN)
4928 4963 zone_status_set(zone, ZONE_IS_DOWN);
4929 4964 mutex_exit(&zone_status_lock);
4930 4965
4931 4966 /*
4932 4967 * Wait for kernel threads to drain.
4933 4968 */
4934 4969 if (!zone_status_wait_sig(zone, ZONE_IS_DOWN)) {
4935 4970 zone_rele(zone);
4936 4971 return (set_errno(EINTR));
4937 4972 }
4938 4973
4939 4974 /*
4940 4975 * Zone can be become down/destroyable even if the above wait
4941 4976 * returns EINTR, so any code added here may never execute.
4942 4977 * (i.e. don't add code here)
4943 4978 */
4944 4979
4945 4980 zone_rele(zone);
4946 4981 return (0);
4947 4982 }
4948 4983
4949 4984 /*
4950 4985 * Log the specified zone's reference counts. The caller should not be
4951 4986 * holding the zone's zone_lock.
4952 4987 */
4953 4988 static void
4954 4989 zone_log_refcounts(zone_t *zone)
4955 4990 {
4956 4991 char *buffer;
4957 4992 char *buffer_position;
4958 4993 uint32_t buffer_size;
4959 4994 uint32_t index;
4960 4995 uint_t ref;
4961 4996 uint_t cred_ref;
4962 4997
4963 4998 /*
4964 4999 * Construct a string representing the subsystem-specific reference
4965 5000 * counts. The counts are printed in ascending order by index into the
4966 5001 * zone_t::zone_subsys_ref array. The list will be surrounded by
4967 5002 * square brackets [] and will only contain nonzero reference counts.
4968 5003 *
4969 5004 * The buffer will hold two square bracket characters plus ten digits,
4970 5005 * one colon, one space, one comma, and some characters for a
4971 5006 * subsystem name per subsystem-specific reference count. (Unsigned 32-
4972 5007 * bit integers have at most ten decimal digits.) The last
4973 5008 * reference count's comma is replaced by the closing square
4974 5009 * bracket and a NULL character to terminate the string.
4975 5010 *
4976 5011 * NOTE: We have to grab the zone's zone_lock to create a consistent
4977 5012 * snapshot of the zone's reference counters.
4978 5013 *
4979 5014 * First, figure out how much space the string buffer will need.
4980 5015 * The buffer's size is stored in buffer_size.
4981 5016 */
4982 5017 buffer_size = 2; /* for the square brackets */
4983 5018 mutex_enter(&zone->zone_lock);
4984 5019 zone->zone_flags |= ZF_REFCOUNTS_LOGGED;
4985 5020 ref = zone->zone_ref;
4986 5021 cred_ref = zone->zone_cred_ref;
4987 5022 for (index = 0; index < ZONE_REF_NUM_SUBSYS; ++index)
4988 5023 if (zone->zone_subsys_ref[index] != 0)
4989 5024 buffer_size += strlen(zone_ref_subsys_names[index]) +
4990 5025 13;
4991 5026 if (buffer_size == 2) {
4992 5027 /*
4993 5028 * No subsystems had nonzero reference counts. Don't bother
4994 5029 * with allocating a buffer; just log the general-purpose and
4995 5030 * credential reference counts.
4996 5031 */
4997 5032 mutex_exit(&zone->zone_lock);
4998 5033 (void) strlog(0, 0, 1, SL_CONSOLE | SL_NOTE,
4999 5034 "Zone '%s' (ID: %d) is shutting down, but %u zone "
5000 5035 "references and %u credential references are still extant",
5001 5036 zone->zone_name, zone->zone_id, ref, cred_ref);
5002 5037 return;
5003 5038 }
5004 5039
5005 5040 /*
5006 5041 * buffer_size contains the exact number of characters that the
5007 5042 * buffer will need. Allocate the buffer and fill it with nonzero
5008 5043 * subsystem-specific reference counts. Surround the results with
5009 5044 * square brackets afterwards.
5010 5045 */
5011 5046 buffer = kmem_alloc(buffer_size, KM_SLEEP);
5012 5047 buffer_position = &buffer[1];
5013 5048 for (index = 0; index < ZONE_REF_NUM_SUBSYS; ++index) {
5014 5049 /*
5015 5050 * NOTE: The DDI's version of sprintf() returns a pointer to
5016 5051 * the modified buffer rather than the number of bytes written
5017 5052 * (as in snprintf(3C)). This is unfortunate and annoying.
5018 5053 * Therefore, we'll use snprintf() with INT_MAX to get the
5019 5054 * number of bytes written. Using INT_MAX is safe because
5020 5055 * the buffer is perfectly sized for the data: we'll never
5021 5056 * overrun the buffer.
5022 5057 */
5023 5058 if (zone->zone_subsys_ref[index] != 0)
5024 5059 buffer_position += snprintf(buffer_position, INT_MAX,
5025 5060 "%s: %u,", zone_ref_subsys_names[index],
5026 5061 zone->zone_subsys_ref[index]);
5027 5062 }
5028 5063 mutex_exit(&zone->zone_lock);
5029 5064 buffer[0] = '[';
5030 5065 ASSERT((uintptr_t)(buffer_position - buffer) < buffer_size);
5031 5066 ASSERT(buffer_position[0] == '\0' && buffer_position[-1] == ',');
5032 5067 buffer_position[-1] = ']';
5033 5068
5034 5069 /*
5035 5070 * Log the reference counts and free the message buffer.
5036 5071 */
5037 5072 (void) strlog(0, 0, 1, SL_CONSOLE | SL_NOTE,
5038 5073 "Zone '%s' (ID: %d) is shutting down, but %u zone references and "
5039 5074 "%u credential references are still extant %s", zone->zone_name,
5040 5075 zone->zone_id, ref, cred_ref, buffer);
5041 5076 kmem_free(buffer, buffer_size);
5042 5077 }
5043 5078
5044 5079 /*
5045 5080 * Systemcall entry point to finalize the zone halt process. The caller
5046 5081 * must have already successfully called zone_shutdown().
5047 5082 *
5048 5083 * Upon successful completion, the zone will have been fully destroyed:
5049 5084 * zsched will have exited, destructor callbacks executed, and the zone
5050 5085 * removed from the list of active zones.
5051 5086 */
5052 5087 static int
5053 5088 zone_destroy(zoneid_t zoneid)
5054 5089 {
5055 5090 uint64_t uniqid;
5056 5091 zone_t *zone;
5057 5092 zone_status_t status;
5058 5093 clock_t wait_time;
5059 5094 boolean_t log_refcounts;
5060 5095
5061 5096 if (secpolicy_zone_config(CRED()) != 0)
5062 5097 return (set_errno(EPERM));
5063 5098 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID)
5064 5099 return (set_errno(EINVAL));
5065 5100
5066 5101 mutex_enter(&zonehash_lock);
5067 5102 /*
5068 5103 * Look for zone under hash lock to prevent races with other
5069 5104 * calls to zone_destroy.
5070 5105 */
5071 5106 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
5072 5107 mutex_exit(&zonehash_lock);
5073 5108 return (set_errno(EINVAL));
5074 5109 }
5075 5110
5076 5111 if (zone_mount_count(zone->zone_rootpath) != 0) {
5077 5112 mutex_exit(&zonehash_lock);
5078 5113 return (set_errno(EBUSY));
5079 5114 }
5080 5115 mutex_enter(&zone_status_lock);
5081 5116 status = zone_status_get(zone);
5082 5117 if (status < ZONE_IS_DOWN) {
5083 5118 mutex_exit(&zone_status_lock);
5084 5119 mutex_exit(&zonehash_lock);
5085 5120 return (set_errno(EBUSY));
5086 5121 } else if (status == ZONE_IS_DOWN) {
5087 5122 zone_status_set(zone, ZONE_IS_DYING); /* Tell zsched to exit */
5088 5123 }
5089 5124 mutex_exit(&zone_status_lock);
5090 5125 zone_hold(zone);
5091 5126 mutex_exit(&zonehash_lock);
5092 5127
5093 5128 /*
5094 5129 * wait for zsched to exit
5095 5130 */
5096 5131 zone_status_wait(zone, ZONE_IS_DEAD);
5097 5132 zone_zsd_callbacks(zone, ZSD_DESTROY);
5098 5133 zone->zone_netstack = NULL;
5099 5134 uniqid = zone->zone_uniqid;
5100 5135 zone_rele(zone);
5101 5136 zone = NULL; /* potentially free'd */
5102 5137
5103 5138 log_refcounts = B_FALSE;
5104 5139 wait_time = SEC_TO_TICK(ZONE_DESTROY_TIMEOUT_SECS);
5105 5140 mutex_enter(&zonehash_lock);
5106 5141 for (; /* ever */; ) {
5107 5142 boolean_t unref;
5108 5143 boolean_t refs_have_been_logged;
5109 5144
5110 5145 if ((zone = zone_find_all_by_id(zoneid)) == NULL ||
5111 5146 zone->zone_uniqid != uniqid) {
5112 5147 /*
5113 5148 * The zone has gone away. Necessary conditions
5114 5149 * are met, so we return success.
5115 5150 */
5116 5151 mutex_exit(&zonehash_lock);
5117 5152 return (0);
5118 5153 }
5119 5154 mutex_enter(&zone->zone_lock);
5120 5155 unref = ZONE_IS_UNREF(zone);
5121 5156 refs_have_been_logged = (zone->zone_flags &
5122 5157 ZF_REFCOUNTS_LOGGED);
5123 5158 mutex_exit(&zone->zone_lock);
5124 5159 if (unref) {
5125 5160 /*
5126 5161 * There is only one reference to the zone -- that
5127 5162 * added when the zone was added to the hashtables --
5128 5163 * and things will remain this way until we drop
5129 5164 * zonehash_lock... we can go ahead and cleanup the
5130 5165 * zone.
5131 5166 */
5132 5167 break;
5133 5168 }
5134 5169
5135 5170 /*
5136 5171 * Wait for zone_rele_common() or zone_cred_rele() to signal
5137 5172 * zone_destroy_cv. zone_destroy_cv is signaled only when
5138 5173 * some zone's general-purpose reference count reaches one.
5139 5174 * If ZONE_DESTROY_TIMEOUT_SECS seconds elapse while waiting
5140 5175 * on zone_destroy_cv, then log the zone's reference counts and
5141 5176 * continue to wait for zone_rele() and zone_cred_rele().
5142 5177 */
5143 5178 if (!refs_have_been_logged) {
5144 5179 if (!log_refcounts) {
5145 5180 /*
5146 5181 * This thread hasn't timed out waiting on
5147 5182 * zone_destroy_cv yet. Wait wait_time clock
5148 5183 * ticks (initially ZONE_DESTROY_TIMEOUT_SECS
5149 5184 * seconds) for the zone's references to clear.
5150 5185 */
5151 5186 ASSERT(wait_time > 0);
5152 5187 wait_time = cv_reltimedwait_sig(
5153 5188 &zone_destroy_cv, &zonehash_lock, wait_time,
5154 5189 TR_SEC);
5155 5190 if (wait_time > 0) {
5156 5191 /*
5157 5192 * A thread in zone_rele() or
5158 5193 * zone_cred_rele() signaled
5159 5194 * zone_destroy_cv before this thread's
5160 5195 * wait timed out. The zone might have
5161 5196 * only one reference left; find out!
5162 5197 */
5163 5198 continue;
5164 5199 } else if (wait_time == 0) {
5165 5200 /* The thread's process was signaled. */
5166 5201 mutex_exit(&zonehash_lock);
5167 5202 return (set_errno(EINTR));
5168 5203 }
5169 5204
5170 5205 /*
5171 5206 * The thread timed out while waiting on
5172 5207 * zone_destroy_cv. Even though the thread
5173 5208 * timed out, it has to check whether another
5174 5209 * thread woke up from zone_destroy_cv and
5175 5210 * destroyed the zone.
5176 5211 *
5177 5212 * If the zone still exists and has more than
5178 5213 * one unreleased general-purpose reference,
5179 5214 * then log the zone's reference counts.
5180 5215 */
5181 5216 log_refcounts = B_TRUE;
5182 5217 continue;
5183 5218 }
5184 5219
5185 5220 /*
5186 5221 * The thread already timed out on zone_destroy_cv while
5187 5222 * waiting for subsystems to release the zone's last
5188 5223 * general-purpose references. Log the zone's reference
5189 5224 * counts and wait indefinitely on zone_destroy_cv.
5190 5225 */
5191 5226 zone_log_refcounts(zone);
5192 5227 }
5193 5228 if (cv_wait_sig(&zone_destroy_cv, &zonehash_lock) == 0) {
5194 5229 /* The thread's process was signaled. */
5195 5230 mutex_exit(&zonehash_lock);
5196 5231 return (set_errno(EINTR));
5197 5232 }
5198 5233 }
5199 5234
5200 5235 /*
5201 5236 * Remove CPU cap for this zone now since we're not going to
5202 5237 * fail below this point.
5203 5238 */
5204 5239 cpucaps_zone_remove(zone);
5205 5240
5206 5241 /* Get rid of the zone's kstats */
5207 5242 zone_kstat_delete(zone);
5208 5243
5209 5244 /* remove the pfexecd doors */
5210 5245 if (zone->zone_pfexecd != NULL) {
5211 5246 klpd_freelist(&zone->zone_pfexecd);
5212 5247 zone->zone_pfexecd = NULL;
5213 5248 }
5214 5249
5215 5250 /* free brand specific data */
5216 5251 if (ZONE_IS_BRANDED(zone))
5217 5252 ZBROP(zone)->b_free_brand_data(zone);
5218 5253
5219 5254 /* Say goodbye to brand framework. */
5220 5255 brand_unregister_zone(zone->zone_brand);
5221 5256
5222 5257 /*
5223 5258 * It is now safe to let the zone be recreated; remove it from the
5224 5259 * lists. The memory will not be freed until the last cred
5225 5260 * reference goes away.
5226 5261 */
5227 5262 ASSERT(zonecount > 1); /* must be > 1; can't destroy global zone */
5228 5263 zonecount--;
5229 5264 /* remove from active list and hash tables */
5230 5265 list_remove(&zone_active, zone);
5231 5266 (void) mod_hash_destroy(zonehashbyname,
5232 5267 (mod_hash_key_t)zone->zone_name);
5233 5268 (void) mod_hash_destroy(zonehashbyid,
5234 5269 (mod_hash_key_t)(uintptr_t)zone->zone_id);
5235 5270 if (zone->zone_flags & ZF_HASHED_LABEL)
5236 5271 (void) mod_hash_destroy(zonehashbylabel,
5237 5272 (mod_hash_key_t)zone->zone_slabel);
5238 5273 mutex_exit(&zonehash_lock);
5239 5274
5240 5275 /*
5241 5276 * Release the root vnode; we're not using it anymore. Nor should any
5242 5277 * other thread that might access it exist.
5243 5278 */
5244 5279 if (zone->zone_rootvp != NULL) {
5245 5280 VN_RELE(zone->zone_rootvp);
5246 5281 zone->zone_rootvp = NULL;
5247 5282 }
5248 5283
5249 5284 /* add to deathrow list */
5250 5285 mutex_enter(&zone_deathrow_lock);
5251 5286 list_insert_tail(&zone_deathrow, zone);
5252 5287 mutex_exit(&zone_deathrow_lock);
5253 5288
5254 5289 /*
5255 5290 * Drop last reference (which was added by zsched()), this will
5256 5291 * free the zone unless there are outstanding cred references.
5257 5292 */
5258 5293 zone_rele(zone);
5259 5294 return (0);
5260 5295 }
5261 5296
5262 5297 /*
5263 5298 * Systemcall entry point for zone_getattr(2).
5264 5299 */
5265 5300 static ssize_t
5266 5301 zone_getattr(zoneid_t zoneid, int attr, void *buf, size_t bufsize)
5267 5302 {
5268 5303 size_t size;
5269 5304 int error = 0, err;
5270 5305 zone_t *zone;
5271 5306 char *zonepath;
5272 5307 char *outstr;
5273 5308 zone_status_t zone_status;
5274 5309 pid_t initpid;
5275 5310 boolean_t global = (curzone == global_zone);
5276 5311 boolean_t inzone = (curzone->zone_id == zoneid);
5277 5312 ushort_t flags;
5278 5313 zone_net_data_t *zbuf;
5279 5314
5280 5315 mutex_enter(&zonehash_lock);
5281 5316 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
5282 5317 mutex_exit(&zonehash_lock);
5283 5318 return (set_errno(EINVAL));
5284 5319 }
5285 5320 zone_status = zone_status_get(zone);
5286 5321 if (zone_status < ZONE_IS_INITIALIZED) {
5287 5322 mutex_exit(&zonehash_lock);
5288 5323 return (set_errno(EINVAL));
5289 5324 }
5290 5325 zone_hold(zone);
5291 5326 mutex_exit(&zonehash_lock);
5292 5327
5293 5328 /*
5294 5329 * If not in the global zone, don't show information about other zones,
5295 5330 * unless the system is labeled and the local zone's label dominates
5296 5331 * the other zone.
5297 5332 */
5298 5333 if (!zone_list_access(zone)) {
5299 5334 zone_rele(zone);
5300 5335 return (set_errno(EINVAL));
5301 5336 }
5302 5337
5303 5338 switch (attr) {
5304 5339 case ZONE_ATTR_ROOT:
5305 5340 if (global) {
5306 5341 /*
5307 5342 * Copy the path to trim the trailing "/" (except for
5308 5343 * the global zone).
5309 5344 */
5310 5345 if (zone != global_zone)
5311 5346 size = zone->zone_rootpathlen - 1;
5312 5347 else
5313 5348 size = zone->zone_rootpathlen;
5314 5349 zonepath = kmem_alloc(size, KM_SLEEP);
5315 5350 bcopy(zone->zone_rootpath, zonepath, size);
5316 5351 zonepath[size - 1] = '\0';
5317 5352 } else {
5318 5353 if (inzone || !is_system_labeled()) {
5319 5354 /*
5320 5355 * Caller is not in the global zone.
5321 5356 * if the query is on the current zone
5322 5357 * or the system is not labeled,
5323 5358 * just return faked-up path for current zone.
5324 5359 */
5325 5360 zonepath = "/";
5326 5361 size = 2;
5327 5362 } else {
5328 5363 /*
5329 5364 * Return related path for current zone.
5330 5365 */
5331 5366 int prefix_len = strlen(zone_prefix);
5332 5367 int zname_len = strlen(zone->zone_name);
5333 5368
5334 5369 size = prefix_len + zname_len + 1;
5335 5370 zonepath = kmem_alloc(size, KM_SLEEP);
5336 5371 bcopy(zone_prefix, zonepath, prefix_len);
5337 5372 bcopy(zone->zone_name, zonepath +
5338 5373 prefix_len, zname_len);
5339 5374 zonepath[size - 1] = '\0';
5340 5375 }
5341 5376 }
5342 5377 if (bufsize > size)
5343 5378 bufsize = size;
5344 5379 if (buf != NULL) {
5345 5380 err = copyoutstr(zonepath, buf, bufsize, NULL);
5346 5381 if (err != 0 && err != ENAMETOOLONG)
5347 5382 error = EFAULT;
5348 5383 }
5349 5384 if (global || (is_system_labeled() && !inzone))
5350 5385 kmem_free(zonepath, size);
5351 5386 break;
5352 5387
5353 5388 case ZONE_ATTR_NAME:
5354 5389 size = strlen(zone->zone_name) + 1;
5355 5390 if (bufsize > size)
5356 5391 bufsize = size;
5357 5392 if (buf != NULL) {
5358 5393 err = copyoutstr(zone->zone_name, buf, bufsize, NULL);
5359 5394 if (err != 0 && err != ENAMETOOLONG)
5360 5395 error = EFAULT;
5361 5396 }
5362 5397 break;
5363 5398
5364 5399 case ZONE_ATTR_STATUS:
5365 5400 /*
5366 5401 * Since we're not holding zonehash_lock, the zone status
5367 5402 * may be anything; leave it up to userland to sort it out.
5368 5403 */
5369 5404 size = sizeof (zone_status);
5370 5405 if (bufsize > size)
5371 5406 bufsize = size;
5372 5407 zone_status = zone_status_get(zone);
5373 5408 if (buf != NULL &&
5374 5409 copyout(&zone_status, buf, bufsize) != 0)
5375 5410 error = EFAULT;
5376 5411 break;
5377 5412 case ZONE_ATTR_FLAGS:
5378 5413 size = sizeof (zone->zone_flags);
5379 5414 if (bufsize > size)
5380 5415 bufsize = size;
5381 5416 flags = zone->zone_flags;
5382 5417 if (buf != NULL &&
5383 5418 copyout(&flags, buf, bufsize) != 0)
5384 5419 error = EFAULT;
5385 5420 break;
5386 5421 case ZONE_ATTR_PRIVSET:
5387 5422 size = sizeof (priv_set_t);
5388 5423 if (bufsize > size)
5389 5424 bufsize = size;
5390 5425 if (buf != NULL &&
5391 5426 copyout(zone->zone_privset, buf, bufsize) != 0)
5392 5427 error = EFAULT;
5393 5428 break;
5394 5429 case ZONE_ATTR_UNIQID:
5395 5430 size = sizeof (zone->zone_uniqid);
5396 5431 if (bufsize > size)
5397 5432 bufsize = size;
5398 5433 if (buf != NULL &&
5399 5434 copyout(&zone->zone_uniqid, buf, bufsize) != 0)
5400 5435 error = EFAULT;
5401 5436 break;
5402 5437 case ZONE_ATTR_POOLID:
5403 5438 {
5404 5439 pool_t *pool;
5405 5440 poolid_t poolid;
5406 5441
5407 5442 if (pool_lock_intr() != 0) {
5408 5443 error = EINTR;
5409 5444 break;
5410 5445 }
5411 5446 pool = zone_pool_get(zone);
5412 5447 poolid = pool->pool_id;
5413 5448 pool_unlock();
5414 5449 size = sizeof (poolid);
5415 5450 if (bufsize > size)
5416 5451 bufsize = size;
5417 5452 if (buf != NULL && copyout(&poolid, buf, size) != 0)
5418 5453 error = EFAULT;
5419 5454 }
5420 5455 break;
5421 5456 case ZONE_ATTR_SLBL:
5422 5457 size = sizeof (bslabel_t);
5423 5458 if (bufsize > size)
5424 5459 bufsize = size;
5425 5460 if (zone->zone_slabel == NULL)
5426 5461 error = EINVAL;
5427 5462 else if (buf != NULL &&
5428 5463 copyout(label2bslabel(zone->zone_slabel), buf,
5429 5464 bufsize) != 0)
5430 5465 error = EFAULT;
5431 5466 break;
5432 5467 case ZONE_ATTR_INITPID:
5433 5468 size = sizeof (initpid);
5434 5469 if (bufsize > size)
5435 5470 bufsize = size;
5436 5471 initpid = zone->zone_proc_initpid;
5437 5472 if (initpid == -1) {
5438 5473 error = ESRCH;
5439 5474 break;
5440 5475 }
5441 5476 if (buf != NULL &&
5442 5477 copyout(&initpid, buf, bufsize) != 0)
5443 5478 error = EFAULT;
5444 5479 break;
5445 5480 case ZONE_ATTR_BRAND:
5446 5481 size = strlen(zone->zone_brand->b_name) + 1;
5447 5482
5448 5483 if (bufsize > size)
5449 5484 bufsize = size;
5450 5485 if (buf != NULL) {
5451 5486 err = copyoutstr(zone->zone_brand->b_name, buf,
5452 5487 bufsize, NULL);
5453 5488 if (err != 0 && err != ENAMETOOLONG)
5454 5489 error = EFAULT;
5455 5490 }
5456 5491 break;
5457 5492 case ZONE_ATTR_INITNAME:
5458 5493 size = strlen(zone->zone_initname) + 1;
5459 5494 if (bufsize > size)
5460 5495 bufsize = size;
5461 5496 if (buf != NULL) {
5462 5497 err = copyoutstr(zone->zone_initname, buf, bufsize,
5463 5498 NULL);
5464 5499 if (err != 0 && err != ENAMETOOLONG)
5465 5500 error = EFAULT;
5466 5501 }
5467 5502 break;
5468 5503 case ZONE_ATTR_BOOTARGS:
5469 5504 if (zone->zone_bootargs == NULL)
5470 5505 outstr = "";
5471 5506 else
5472 5507 outstr = zone->zone_bootargs;
5473 5508 size = strlen(outstr) + 1;
5474 5509 if (bufsize > size)
5475 5510 bufsize = size;
5476 5511 if (buf != NULL) {
5477 5512 err = copyoutstr(outstr, buf, bufsize, NULL);
5478 5513 if (err != 0 && err != ENAMETOOLONG)
5479 5514 error = EFAULT;
5480 5515 }
5481 5516 break;
5482 5517 case ZONE_ATTR_PHYS_MCAP:
5483 5518 size = sizeof (zone->zone_phys_mcap);
5484 5519 if (bufsize > size)
5485 5520 bufsize = size;
5486 5521 if (buf != NULL &&
5487 5522 copyout(&zone->zone_phys_mcap, buf, bufsize) != 0)
5488 5523 error = EFAULT;
5489 5524 break;
5490 5525 case ZONE_ATTR_SCHED_CLASS:
5491 5526 mutex_enter(&class_lock);
5492 5527
5493 5528 if (zone->zone_defaultcid >= loaded_classes)
5494 5529 outstr = "";
5495 5530 else
5496 5531 outstr = sclass[zone->zone_defaultcid].cl_name;
5497 5532 size = strlen(outstr) + 1;
5498 5533 if (bufsize > size)
5499 5534 bufsize = size;
5500 5535 if (buf != NULL) {
5501 5536 err = copyoutstr(outstr, buf, bufsize, NULL);
5502 5537 if (err != 0 && err != ENAMETOOLONG)
5503 5538 error = EFAULT;
5504 5539 }
5505 5540
5506 5541 mutex_exit(&class_lock);
5507 5542 break;
5508 5543 case ZONE_ATTR_HOSTID:
5509 5544 if (zone->zone_hostid != HW_INVALID_HOSTID &&
5510 5545 bufsize == sizeof (zone->zone_hostid)) {
5511 5546 size = sizeof (zone->zone_hostid);
5512 5547 if (buf != NULL && copyout(&zone->zone_hostid, buf,
5513 5548 bufsize) != 0)
5514 5549 error = EFAULT;
5515 5550 } else {
5516 5551 error = EINVAL;
5517 5552 }
5518 5553 break;
5519 5554 case ZONE_ATTR_FS_ALLOWED:
5520 5555 if (zone->zone_fs_allowed == NULL)
5521 5556 outstr = "";
5522 5557 else
|
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5523 5558 outstr = zone->zone_fs_allowed;
5524 5559 size = strlen(outstr) + 1;
5525 5560 if (bufsize > size)
5526 5561 bufsize = size;
5527 5562 if (buf != NULL) {
5528 5563 err = copyoutstr(outstr, buf, bufsize, NULL);
5529 5564 if (err != 0 && err != ENAMETOOLONG)
5530 5565 error = EFAULT;
5531 5566 }
5532 5567 break;
5568 + case ZONE_ATTR_SECFLAGS:
5569 + size = sizeof (zone->zone_secflags);
5570 + if (bufsize > size)
5571 + bufsize = size;
5572 + if ((err = copyout(&zone->zone_secflags, buf, bufsize)) != 0)
5573 + error = EFAULT;
5574 + break;
5533 5575 case ZONE_ATTR_NETWORK:
5534 5576 zbuf = kmem_alloc(bufsize, KM_SLEEP);
5535 5577 if (copyin(buf, zbuf, bufsize) != 0) {
5536 5578 error = EFAULT;
5537 5579 } else {
5538 5580 error = zone_get_network(zoneid, zbuf);
5539 5581 if (error == 0 && copyout(zbuf, buf, bufsize) != 0)
5540 5582 error = EFAULT;
5541 5583 }
5542 5584 kmem_free(zbuf, bufsize);
5543 5585 break;
5544 5586 default:
5545 5587 if ((attr >= ZONE_ATTR_BRAND_ATTRS) && ZONE_IS_BRANDED(zone)) {
5546 5588 size = bufsize;
5547 5589 error = ZBROP(zone)->b_getattr(zone, attr, buf, &size);
5548 5590 } else {
5549 5591 error = EINVAL;
5550 5592 }
5551 5593 }
5552 5594 zone_rele(zone);
5553 5595
5554 5596 if (error)
5555 5597 return (set_errno(error));
5556 5598 return ((ssize_t)size);
5557 5599 }
5558 5600
5559 5601 /*
5560 5602 * Systemcall entry point for zone_setattr(2).
5561 5603 */
5562 5604 /*ARGSUSED*/
5563 5605 static int
5564 5606 zone_setattr(zoneid_t zoneid, int attr, void *buf, size_t bufsize)
5565 5607 {
5566 5608 zone_t *zone;
5567 5609 zone_status_t zone_status;
5568 5610 int err = -1;
5569 5611 zone_net_data_t *zbuf;
5570 5612
5571 5613 if (secpolicy_zone_config(CRED()) != 0)
5572 5614 return (set_errno(EPERM));
5573 5615
5574 5616 /*
5575 5617 * Only the ZONE_ATTR_PHYS_MCAP attribute can be set on the
5576 5618 * global zone.
5577 5619 */
5578 5620 if (zoneid == GLOBAL_ZONEID && attr != ZONE_ATTR_PHYS_MCAP) {
5579 5621 return (set_errno(EINVAL));
5580 5622 }
5581 5623
5582 5624 mutex_enter(&zonehash_lock);
5583 5625 if ((zone = zone_find_all_by_id(zoneid)) == NULL) {
5584 5626 mutex_exit(&zonehash_lock);
5585 5627 return (set_errno(EINVAL));
5586 5628 }
5587 5629 zone_hold(zone);
5588 5630 mutex_exit(&zonehash_lock);
5589 5631
5590 5632 /*
5591 5633 * At present most attributes can only be set on non-running,
5592 5634 * non-global zones.
5593 5635 */
5594 5636 zone_status = zone_status_get(zone);
5595 5637 if (attr != ZONE_ATTR_PHYS_MCAP && zone_status > ZONE_IS_READY) {
5596 5638 err = EINVAL;
5597 5639 goto done;
5598 5640 }
5599 5641
5600 5642 switch (attr) {
5601 5643 case ZONE_ATTR_INITNAME:
5602 5644 err = zone_set_initname(zone, (const char *)buf);
5603 5645 break;
5604 5646 case ZONE_ATTR_INITNORESTART:
5605 5647 zone->zone_restart_init = B_FALSE;
5606 5648 err = 0;
|
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5607 5649 break;
5608 5650 case ZONE_ATTR_BOOTARGS:
5609 5651 err = zone_set_bootargs(zone, (const char *)buf);
5610 5652 break;
5611 5653 case ZONE_ATTR_BRAND:
5612 5654 err = zone_set_brand(zone, (const char *)buf);
5613 5655 break;
5614 5656 case ZONE_ATTR_FS_ALLOWED:
5615 5657 err = zone_set_fs_allowed(zone, (const char *)buf);
5616 5658 break;
5659 + case ZONE_ATTR_SECFLAGS:
5660 + err = zone_set_secflags(zone, (psecflags_t *)buf);
5661 + break;
5617 5662 case ZONE_ATTR_PHYS_MCAP:
5618 5663 err = zone_set_phys_mcap(zone, (const uint64_t *)buf);
5619 5664 break;
5620 5665 case ZONE_ATTR_SCHED_CLASS:
5621 5666 err = zone_set_sched_class(zone, (const char *)buf);
5622 5667 break;
5623 5668 case ZONE_ATTR_HOSTID:
5624 5669 if (bufsize == sizeof (zone->zone_hostid)) {
5625 5670 if (copyin(buf, &zone->zone_hostid, bufsize) == 0)
5626 5671 err = 0;
5627 5672 else
5628 5673 err = EFAULT;
5629 5674 } else {
5630 5675 err = EINVAL;
5631 5676 }
5632 5677 break;
5633 5678 case ZONE_ATTR_NETWORK:
5634 5679 if (bufsize > (PIPE_BUF + sizeof (zone_net_data_t))) {
5635 5680 err = EINVAL;
5636 5681 break;
5637 5682 }
5638 5683 zbuf = kmem_alloc(bufsize, KM_SLEEP);
5639 5684 if (copyin(buf, zbuf, bufsize) != 0) {
5640 5685 kmem_free(zbuf, bufsize);
5641 5686 err = EFAULT;
5642 5687 break;
5643 5688 }
5644 5689 err = zone_set_network(zoneid, zbuf);
5645 5690 kmem_free(zbuf, bufsize);
5646 5691 break;
5647 5692 default:
5648 5693 if ((attr >= ZONE_ATTR_BRAND_ATTRS) && ZONE_IS_BRANDED(zone))
5649 5694 err = ZBROP(zone)->b_setattr(zone, attr, buf, bufsize);
5650 5695 else
5651 5696 err = EINVAL;
5652 5697 }
5653 5698
5654 5699 done:
5655 5700 zone_rele(zone);
5656 5701 ASSERT(err != -1);
5657 5702 return (err != 0 ? set_errno(err) : 0);
5658 5703 }
5659 5704
5660 5705 /*
5661 5706 * Return zero if the process has at least one vnode mapped in to its
5662 5707 * address space which shouldn't be allowed to change zones.
5663 5708 *
5664 5709 * Also return zero if the process has any shared mappings which reserve
5665 5710 * swap. This is because the counting for zone.max-swap does not allow swap
5666 5711 * reservation to be shared between zones. zone swap reservation is counted
5667 5712 * on zone->zone_max_swap.
5668 5713 */
5669 5714 static int
5670 5715 as_can_change_zones(void)
5671 5716 {
5672 5717 proc_t *pp = curproc;
5673 5718 struct seg *seg;
5674 5719 struct as *as = pp->p_as;
5675 5720 vnode_t *vp;
5676 5721 int allow = 1;
5677 5722
5678 5723 ASSERT(pp->p_as != &kas);
5679 5724 AS_LOCK_ENTER(as, RW_READER);
5680 5725 for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg)) {
5681 5726
5682 5727 /*
5683 5728 * Cannot enter zone with shared anon memory which
5684 5729 * reserves swap. See comment above.
5685 5730 */
5686 5731 if (seg_can_change_zones(seg) == B_FALSE) {
5687 5732 allow = 0;
5688 5733 break;
5689 5734 }
5690 5735 /*
5691 5736 * if we can't get a backing vnode for this segment then skip
5692 5737 * it.
5693 5738 */
5694 5739 vp = NULL;
5695 5740 if (SEGOP_GETVP(seg, seg->s_base, &vp) != 0 || vp == NULL)
5696 5741 continue;
5697 5742 if (!vn_can_change_zones(vp)) { /* bail on first match */
5698 5743 allow = 0;
5699 5744 break;
5700 5745 }
5701 5746 }
5702 5747 AS_LOCK_EXIT(as);
5703 5748 return (allow);
5704 5749 }
5705 5750
5706 5751 /*
5707 5752 * Count swap reserved by curproc's address space
5708 5753 */
5709 5754 static size_t
5710 5755 as_swresv(void)
5711 5756 {
5712 5757 proc_t *pp = curproc;
5713 5758 struct seg *seg;
5714 5759 struct as *as = pp->p_as;
5715 5760 size_t swap = 0;
5716 5761
5717 5762 ASSERT(pp->p_as != &kas);
5718 5763 ASSERT(AS_WRITE_HELD(as));
5719 5764 for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg))
5720 5765 swap += seg_swresv(seg);
5721 5766
5722 5767 return (swap);
5723 5768 }
5724 5769
5725 5770 /*
5726 5771 * Systemcall entry point for zone_enter().
5727 5772 *
5728 5773 * The current process is injected into said zone. In the process
5729 5774 * it will change its project membership, privileges, rootdir/cwd,
5730 5775 * zone-wide rctls, and pool association to match those of the zone.
5731 5776 *
5732 5777 * The first zone_enter() called while the zone is in the ZONE_IS_READY
5733 5778 * state will transition it to ZONE_IS_RUNNING. Processes may only
5734 5779 * enter a zone that is "ready" or "running".
5735 5780 */
5736 5781 static int
5737 5782 zone_enter(zoneid_t zoneid)
5738 5783 {
5739 5784 zone_t *zone;
5740 5785 vnode_t *vp;
5741 5786 proc_t *pp = curproc;
5742 5787 contract_t *ct;
5743 5788 cont_process_t *ctp;
5744 5789 task_t *tk, *oldtk;
5745 5790 kproject_t *zone_proj0;
5746 5791 cred_t *cr, *newcr;
5747 5792 pool_t *oldpool, *newpool;
5748 5793 sess_t *sp;
5749 5794 uid_t uid;
5750 5795 zone_status_t status;
5751 5796 int err = 0;
5752 5797 rctl_entity_p_t e;
5753 5798 size_t swap;
5754 5799 kthread_id_t t;
5755 5800
5756 5801 if (secpolicy_zone_config(CRED()) != 0)
5757 5802 return (set_errno(EPERM));
5758 5803 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID)
5759 5804 return (set_errno(EINVAL));
5760 5805
5761 5806 /*
5762 5807 * Stop all lwps so we don't need to hold a lock to look at
5763 5808 * curproc->p_zone. This needs to happen before we grab any
5764 5809 * locks to avoid deadlock (another lwp in the process could
5765 5810 * be waiting for the held lock).
5766 5811 */
5767 5812 if (curthread != pp->p_agenttp && !holdlwps(SHOLDFORK))
5768 5813 return (set_errno(EINTR));
5769 5814
5770 5815 /*
5771 5816 * Make sure we're not changing zones with files open or mapped in
5772 5817 * to our address space which shouldn't be changing zones.
5773 5818 */
5774 5819 if (!files_can_change_zones()) {
5775 5820 err = EBADF;
5776 5821 goto out;
5777 5822 }
5778 5823 if (!as_can_change_zones()) {
5779 5824 err = EFAULT;
5780 5825 goto out;
5781 5826 }
5782 5827
5783 5828 mutex_enter(&zonehash_lock);
5784 5829 if (pp->p_zone != global_zone) {
5785 5830 mutex_exit(&zonehash_lock);
5786 5831 err = EINVAL;
5787 5832 goto out;
5788 5833 }
5789 5834
5790 5835 zone = zone_find_all_by_id(zoneid);
5791 5836 if (zone == NULL) {
5792 5837 mutex_exit(&zonehash_lock);
5793 5838 err = EINVAL;
5794 5839 goto out;
5795 5840 }
5796 5841
5797 5842 /*
5798 5843 * To prevent processes in a zone from holding contracts on
5799 5844 * extrazonal resources, and to avoid process contract
5800 5845 * memberships which span zones, contract holders and processes
5801 5846 * which aren't the sole members of their encapsulating process
5802 5847 * contracts are not allowed to zone_enter.
5803 5848 */
5804 5849 ctp = pp->p_ct_process;
5805 5850 ct = &ctp->conp_contract;
5806 5851 mutex_enter(&ct->ct_lock);
5807 5852 mutex_enter(&pp->p_lock);
5808 5853 if ((avl_numnodes(&pp->p_ct_held) != 0) || (ctp->conp_nmembers != 1)) {
5809 5854 mutex_exit(&pp->p_lock);
5810 5855 mutex_exit(&ct->ct_lock);
5811 5856 mutex_exit(&zonehash_lock);
5812 5857 err = EINVAL;
5813 5858 goto out;
5814 5859 }
5815 5860
5816 5861 /*
5817 5862 * Moreover, we don't allow processes whose encapsulating
5818 5863 * process contracts have inherited extrazonal contracts.
5819 5864 * While it would be easier to eliminate all process contracts
5820 5865 * with inherited contracts, we need to be able to give a
5821 5866 * restarted init (or other zone-penetrating process) its
5822 5867 * predecessor's contracts.
5823 5868 */
5824 5869 if (ctp->conp_ninherited != 0) {
5825 5870 contract_t *next;
5826 5871 for (next = list_head(&ctp->conp_inherited); next;
5827 5872 next = list_next(&ctp->conp_inherited, next)) {
5828 5873 if (contract_getzuniqid(next) != zone->zone_uniqid) {
5829 5874 mutex_exit(&pp->p_lock);
5830 5875 mutex_exit(&ct->ct_lock);
5831 5876 mutex_exit(&zonehash_lock);
5832 5877 err = EINVAL;
5833 5878 goto out;
5834 5879 }
5835 5880 }
5836 5881 }
5837 5882
5838 5883 mutex_exit(&pp->p_lock);
5839 5884 mutex_exit(&ct->ct_lock);
5840 5885
5841 5886 status = zone_status_get(zone);
5842 5887 if (status < ZONE_IS_READY || status >= ZONE_IS_SHUTTING_DOWN) {
5843 5888 /*
5844 5889 * Can't join
5845 5890 */
5846 5891 mutex_exit(&zonehash_lock);
5847 5892 err = EINVAL;
5848 5893 goto out;
5849 5894 }
5850 5895
5851 5896 /*
5852 5897 * Make sure new priv set is within the permitted set for caller
5853 5898 */
5854 5899 if (!priv_issubset(zone->zone_privset, &CR_OPPRIV(CRED()))) {
5855 5900 mutex_exit(&zonehash_lock);
5856 5901 err = EPERM;
5857 5902 goto out;
5858 5903 }
5859 5904 /*
5860 5905 * We want to momentarily drop zonehash_lock while we optimistically
5861 5906 * bind curproc to the pool it should be running in. This is safe
5862 5907 * since the zone can't disappear (we have a hold on it).
5863 5908 */
5864 5909 zone_hold(zone);
5865 5910 mutex_exit(&zonehash_lock);
5866 5911
5867 5912 /*
5868 5913 * Grab pool_lock to keep the pools configuration from changing
5869 5914 * and to stop ourselves from getting rebound to another pool
5870 5915 * until we join the zone.
5871 5916 */
5872 5917 if (pool_lock_intr() != 0) {
5873 5918 zone_rele(zone);
5874 5919 err = EINTR;
5875 5920 goto out;
5876 5921 }
5877 5922 ASSERT(secpolicy_pool(CRED()) == 0);
5878 5923 /*
5879 5924 * Bind ourselves to the pool currently associated with the zone.
5880 5925 */
5881 5926 oldpool = curproc->p_pool;
5882 5927 newpool = zone_pool_get(zone);
5883 5928 if (pool_state == POOL_ENABLED && newpool != oldpool &&
5884 5929 (err = pool_do_bind(newpool, P_PID, P_MYID,
5885 5930 POOL_BIND_ALL)) != 0) {
5886 5931 pool_unlock();
5887 5932 zone_rele(zone);
5888 5933 goto out;
5889 5934 }
5890 5935
5891 5936 /*
5892 5937 * Grab cpu_lock now; we'll need it later when we call
5893 5938 * task_join().
5894 5939 */
5895 5940 mutex_enter(&cpu_lock);
5896 5941 mutex_enter(&zonehash_lock);
5897 5942 /*
5898 5943 * Make sure the zone hasn't moved on since we dropped zonehash_lock.
5899 5944 */
5900 5945 if (zone_status_get(zone) >= ZONE_IS_SHUTTING_DOWN) {
5901 5946 /*
5902 5947 * Can't join anymore.
5903 5948 */
5904 5949 mutex_exit(&zonehash_lock);
5905 5950 mutex_exit(&cpu_lock);
5906 5951 if (pool_state == POOL_ENABLED &&
5907 5952 newpool != oldpool)
5908 5953 (void) pool_do_bind(oldpool, P_PID, P_MYID,
5909 5954 POOL_BIND_ALL);
5910 5955 pool_unlock();
5911 5956 zone_rele(zone);
5912 5957 err = EINVAL;
5913 5958 goto out;
5914 5959 }
5915 5960
5916 5961 /*
5917 5962 * a_lock must be held while transfering locked memory and swap
5918 5963 * reservation from the global zone to the non global zone because
5919 5964 * asynchronous faults on the processes' address space can lock
5920 5965 * memory and reserve swap via MCL_FUTURE and MAP_NORESERVE
5921 5966 * segments respectively.
5922 5967 */
5923 5968 AS_LOCK_ENTER(pp->p_as, RW_WRITER);
5924 5969 swap = as_swresv();
5925 5970 mutex_enter(&pp->p_lock);
5926 5971 zone_proj0 = zone->zone_zsched->p_task->tk_proj;
5927 5972 /* verify that we do not exceed and task or lwp limits */
5928 5973 mutex_enter(&zone->zone_nlwps_lock);
5929 5974 /* add new lwps to zone and zone's proj0 */
5930 5975 zone_proj0->kpj_nlwps += pp->p_lwpcnt;
5931 5976 zone->zone_nlwps += pp->p_lwpcnt;
5932 5977 /* add 1 task to zone's proj0 */
5933 5978 zone_proj0->kpj_ntasks += 1;
5934 5979
5935 5980 zone_proj0->kpj_nprocs++;
5936 5981 zone->zone_nprocs++;
5937 5982 mutex_exit(&zone->zone_nlwps_lock);
5938 5983
5939 5984 mutex_enter(&zone->zone_mem_lock);
5940 5985 zone->zone_locked_mem += pp->p_locked_mem;
5941 5986 zone_proj0->kpj_data.kpd_locked_mem += pp->p_locked_mem;
5942 5987 zone->zone_max_swap += swap;
5943 5988 mutex_exit(&zone->zone_mem_lock);
5944 5989
5945 5990 mutex_enter(&(zone_proj0->kpj_data.kpd_crypto_lock));
5946 5991 zone_proj0->kpj_data.kpd_crypto_mem += pp->p_crypto_mem;
5947 5992 mutex_exit(&(zone_proj0->kpj_data.kpd_crypto_lock));
5948 5993
5949 5994 /* remove lwps and process from proc's old zone and old project */
5950 5995 mutex_enter(&pp->p_zone->zone_nlwps_lock);
5951 5996 pp->p_zone->zone_nlwps -= pp->p_lwpcnt;
5952 5997 pp->p_task->tk_proj->kpj_nlwps -= pp->p_lwpcnt;
5953 5998 pp->p_task->tk_proj->kpj_nprocs--;
5954 5999 pp->p_zone->zone_nprocs--;
5955 6000 mutex_exit(&pp->p_zone->zone_nlwps_lock);
5956 6001
5957 6002 mutex_enter(&pp->p_zone->zone_mem_lock);
5958 6003 pp->p_zone->zone_locked_mem -= pp->p_locked_mem;
5959 6004 pp->p_task->tk_proj->kpj_data.kpd_locked_mem -= pp->p_locked_mem;
5960 6005 pp->p_zone->zone_max_swap -= swap;
5961 6006 mutex_exit(&pp->p_zone->zone_mem_lock);
5962 6007
5963 6008 mutex_enter(&(pp->p_task->tk_proj->kpj_data.kpd_crypto_lock));
5964 6009 pp->p_task->tk_proj->kpj_data.kpd_crypto_mem -= pp->p_crypto_mem;
5965 6010 mutex_exit(&(pp->p_task->tk_proj->kpj_data.kpd_crypto_lock));
5966 6011
5967 6012 pp->p_flag |= SZONETOP;
5968 6013 pp->p_zone = zone;
5969 6014 mutex_exit(&pp->p_lock);
5970 6015 AS_LOCK_EXIT(pp->p_as);
5971 6016
5972 6017 /*
5973 6018 * Joining the zone cannot fail from now on.
5974 6019 *
5975 6020 * This means that a lot of the following code can be commonized and
5976 6021 * shared with zsched().
5977 6022 */
5978 6023
5979 6024 /*
5980 6025 * If the process contract fmri was inherited, we need to
5981 6026 * flag this so that any contract status will not leak
5982 6027 * extra zone information, svc_fmri in this case
5983 6028 */
5984 6029 if (ctp->conp_svc_ctid != ct->ct_id) {
5985 6030 mutex_enter(&ct->ct_lock);
5986 6031 ctp->conp_svc_zone_enter = ct->ct_id;
5987 6032 mutex_exit(&ct->ct_lock);
5988 6033 }
5989 6034
5990 6035 /*
5991 6036 * Reset the encapsulating process contract's zone.
5992 6037 */
5993 6038 ASSERT(ct->ct_mzuniqid == GLOBAL_ZONEUNIQID);
5994 6039 contract_setzuniqid(ct, zone->zone_uniqid);
5995 6040
5996 6041 /*
5997 6042 * Create a new task and associate the process with the project keyed
5998 6043 * by (projid,zoneid).
5999 6044 *
6000 6045 * We might as well be in project 0; the global zone's projid doesn't
6001 6046 * make much sense in a zone anyhow.
6002 6047 *
6003 6048 * This also increments zone_ntasks, and returns with p_lock held.
6004 6049 */
6005 6050 tk = task_create(0, zone);
6006 6051 oldtk = task_join(tk, 0);
6007 6052 mutex_exit(&cpu_lock);
6008 6053
6009 6054 /*
6010 6055 * call RCTLOP_SET functions on this proc
6011 6056 */
6012 6057 e.rcep_p.zone = zone;
6013 6058 e.rcep_t = RCENTITY_ZONE;
6014 6059 (void) rctl_set_dup(NULL, NULL, pp, &e, zone->zone_rctls, NULL,
6015 6060 RCD_CALLBACK);
6016 6061 mutex_exit(&pp->p_lock);
6017 6062
6018 6063 /*
6019 6064 * We don't need to hold any of zsched's locks here; not only do we know
6020 6065 * the process and zone aren't going away, we know its session isn't
6021 6066 * changing either.
6022 6067 *
6023 6068 * By joining zsched's session here, we mimic the behavior in the
6024 6069 * global zone of init's sid being the pid of sched. We extend this
6025 6070 * to all zlogin-like zone_enter()'ing processes as well.
6026 6071 */
6027 6072 mutex_enter(&pidlock);
6028 6073 sp = zone->zone_zsched->p_sessp;
6029 6074 sess_hold(zone->zone_zsched);
6030 6075 mutex_enter(&pp->p_lock);
6031 6076 pgexit(pp);
6032 6077 sess_rele(pp->p_sessp, B_TRUE);
6033 6078 pp->p_sessp = sp;
6034 6079 pgjoin(pp, zone->zone_zsched->p_pidp);
6035 6080
6036 6081 /*
6037 6082 * If any threads are scheduled to be placed on zone wait queue they
6038 6083 * should abandon the idea since the wait queue is changing.
6039 6084 * We need to be holding pidlock & p_lock to do this.
6040 6085 */
6041 6086 if ((t = pp->p_tlist) != NULL) {
6042 6087 do {
6043 6088 thread_lock(t);
6044 6089 /*
6045 6090 * Kick this thread so that he doesn't sit
6046 6091 * on a wrong wait queue.
6047 6092 */
6048 6093 if (ISWAITING(t))
6049 6094 setrun_locked(t);
6050 6095
6051 6096 if (t->t_schedflag & TS_ANYWAITQ)
6052 6097 t->t_schedflag &= ~ TS_ANYWAITQ;
6053 6098
6054 6099 thread_unlock(t);
6055 6100 } while ((t = t->t_forw) != pp->p_tlist);
6056 6101 }
6057 6102
6058 6103 /*
6059 6104 * If there is a default scheduling class for the zone and it is not
6060 6105 * the class we are currently in, change all of the threads in the
6061 6106 * process to the new class. We need to be holding pidlock & p_lock
6062 6107 * when we call parmsset so this is a good place to do it.
6063 6108 */
6064 6109 if (zone->zone_defaultcid > 0 &&
6065 6110 zone->zone_defaultcid != curthread->t_cid) {
6066 6111 pcparms_t pcparms;
6067 6112
6068 6113 pcparms.pc_cid = zone->zone_defaultcid;
6069 6114 pcparms.pc_clparms[0] = 0;
6070 6115
6071 6116 /*
6072 6117 * If setting the class fails, we still want to enter the zone.
6073 6118 */
6074 6119 if ((t = pp->p_tlist) != NULL) {
6075 6120 do {
6076 6121 (void) parmsset(&pcparms, t);
6077 6122 } while ((t = t->t_forw) != pp->p_tlist);
6078 6123 }
6079 6124 }
6080 6125
6081 6126 mutex_exit(&pp->p_lock);
6082 6127 mutex_exit(&pidlock);
6083 6128
6084 6129 mutex_exit(&zonehash_lock);
6085 6130 /*
6086 6131 * We're firmly in the zone; let pools progress.
6087 6132 */
6088 6133 pool_unlock();
6089 6134 task_rele(oldtk);
6090 6135 /*
6091 6136 * We don't need to retain a hold on the zone since we already
6092 6137 * incremented zone_ntasks, so the zone isn't going anywhere.
6093 6138 */
6094 6139 zone_rele(zone);
6095 6140
6096 6141 /*
6097 6142 * Chroot
6098 6143 */
6099 6144 vp = zone->zone_rootvp;
6100 6145 zone_chdir(vp, &PTOU(pp)->u_cdir, pp);
6101 6146 zone_chdir(vp, &PTOU(pp)->u_rdir, pp);
6102 6147
6103 6148 /*
6104 6149 * Change process credentials
6105 6150 */
6106 6151 newcr = cralloc();
6107 6152 mutex_enter(&pp->p_crlock);
6108 6153 cr = pp->p_cred;
6109 6154 crcopy_to(cr, newcr);
6110 6155 crsetzone(newcr, zone);
6111 6156 pp->p_cred = newcr;
6112 6157
6113 6158 /*
6114 6159 * Restrict all process privilege sets to zone limit
6115 6160 */
6116 6161 priv_intersect(zone->zone_privset, &CR_PPRIV(newcr));
6117 6162 priv_intersect(zone->zone_privset, &CR_EPRIV(newcr));
6118 6163 priv_intersect(zone->zone_privset, &CR_IPRIV(newcr));
6119 6164 priv_intersect(zone->zone_privset, &CR_LPRIV(newcr));
6120 6165 mutex_exit(&pp->p_crlock);
6121 6166 crset(pp, newcr);
6122 6167
6123 6168 /*
6124 6169 * Adjust upcount to reflect zone entry.
6125 6170 */
6126 6171 uid = crgetruid(newcr);
6127 6172 mutex_enter(&pidlock);
6128 6173 upcount_dec(uid, GLOBAL_ZONEID);
6129 6174 upcount_inc(uid, zoneid);
6130 6175 mutex_exit(&pidlock);
6131 6176
6132 6177 /*
6133 6178 * Set up core file path and content.
6134 6179 */
6135 6180 set_core_defaults();
6136 6181
6137 6182 out:
6138 6183 /*
6139 6184 * Let the other lwps continue.
6140 6185 */
6141 6186 mutex_enter(&pp->p_lock);
6142 6187 if (curthread != pp->p_agenttp)
6143 6188 continuelwps(pp);
6144 6189 mutex_exit(&pp->p_lock);
6145 6190
6146 6191 return (err != 0 ? set_errno(err) : 0);
6147 6192 }
6148 6193
6149 6194 /*
6150 6195 * Systemcall entry point for zone_list(2).
6151 6196 *
6152 6197 * Processes running in a (non-global) zone only see themselves.
6153 6198 * On labeled systems, they see all zones whose label they dominate.
6154 6199 */
6155 6200 static int
6156 6201 zone_list(zoneid_t *zoneidlist, uint_t *numzones)
6157 6202 {
6158 6203 zoneid_t *zoneids;
6159 6204 zone_t *zone, *myzone;
6160 6205 uint_t user_nzones, real_nzones;
6161 6206 uint_t domi_nzones;
6162 6207 int error;
6163 6208
6164 6209 if (copyin(numzones, &user_nzones, sizeof (uint_t)) != 0)
6165 6210 return (set_errno(EFAULT));
6166 6211
6167 6212 myzone = curproc->p_zone;
6168 6213 if (myzone != global_zone) {
6169 6214 bslabel_t *mybslab;
6170 6215
6171 6216 if (!is_system_labeled()) {
6172 6217 /* just return current zone */
6173 6218 real_nzones = domi_nzones = 1;
6174 6219 zoneids = kmem_alloc(sizeof (zoneid_t), KM_SLEEP);
6175 6220 zoneids[0] = myzone->zone_id;
6176 6221 } else {
6177 6222 /* return all zones that are dominated */
6178 6223 mutex_enter(&zonehash_lock);
6179 6224 real_nzones = zonecount;
6180 6225 domi_nzones = 0;
6181 6226 if (real_nzones > 0) {
6182 6227 zoneids = kmem_alloc(real_nzones *
6183 6228 sizeof (zoneid_t), KM_SLEEP);
6184 6229 mybslab = label2bslabel(myzone->zone_slabel);
6185 6230 for (zone = list_head(&zone_active);
6186 6231 zone != NULL;
6187 6232 zone = list_next(&zone_active, zone)) {
6188 6233 if (zone->zone_id == GLOBAL_ZONEID)
6189 6234 continue;
6190 6235 if (zone != myzone &&
6191 6236 (zone->zone_flags & ZF_IS_SCRATCH))
6192 6237 continue;
6193 6238 /*
6194 6239 * Note that a label always dominates
6195 6240 * itself, so myzone is always included
6196 6241 * in the list.
6197 6242 */
6198 6243 if (bldominates(mybslab,
6199 6244 label2bslabel(zone->zone_slabel))) {
6200 6245 zoneids[domi_nzones++] =
6201 6246 zone->zone_id;
6202 6247 }
6203 6248 }
6204 6249 }
6205 6250 mutex_exit(&zonehash_lock);
6206 6251 }
6207 6252 } else {
6208 6253 mutex_enter(&zonehash_lock);
6209 6254 real_nzones = zonecount;
6210 6255 domi_nzones = 0;
6211 6256 if (real_nzones > 0) {
6212 6257 zoneids = kmem_alloc(real_nzones * sizeof (zoneid_t),
6213 6258 KM_SLEEP);
6214 6259 for (zone = list_head(&zone_active); zone != NULL;
6215 6260 zone = list_next(&zone_active, zone))
6216 6261 zoneids[domi_nzones++] = zone->zone_id;
6217 6262 ASSERT(domi_nzones == real_nzones);
6218 6263 }
6219 6264 mutex_exit(&zonehash_lock);
6220 6265 }
6221 6266
6222 6267 /*
6223 6268 * If user has allocated space for fewer entries than we found, then
6224 6269 * return only up to his limit. Either way, tell him exactly how many
6225 6270 * we found.
6226 6271 */
6227 6272 if (domi_nzones < user_nzones)
6228 6273 user_nzones = domi_nzones;
6229 6274 error = 0;
6230 6275 if (copyout(&domi_nzones, numzones, sizeof (uint_t)) != 0) {
6231 6276 error = EFAULT;
6232 6277 } else if (zoneidlist != NULL && user_nzones != 0) {
6233 6278 if (copyout(zoneids, zoneidlist,
6234 6279 user_nzones * sizeof (zoneid_t)) != 0)
6235 6280 error = EFAULT;
6236 6281 }
6237 6282
6238 6283 if (real_nzones > 0)
6239 6284 kmem_free(zoneids, real_nzones * sizeof (zoneid_t));
6240 6285
6241 6286 if (error != 0)
6242 6287 return (set_errno(error));
6243 6288 else
6244 6289 return (0);
6245 6290 }
6246 6291
6247 6292 /*
6248 6293 * Systemcall entry point for zone_lookup(2).
6249 6294 *
6250 6295 * Non-global zones are only able to see themselves and (on labeled systems)
6251 6296 * the zones they dominate.
6252 6297 */
6253 6298 static zoneid_t
6254 6299 zone_lookup(const char *zone_name)
6255 6300 {
6256 6301 char *kname;
6257 6302 zone_t *zone;
6258 6303 zoneid_t zoneid;
6259 6304 int err;
6260 6305
6261 6306 if (zone_name == NULL) {
6262 6307 /* return caller's zone id */
6263 6308 return (getzoneid());
6264 6309 }
6265 6310
6266 6311 kname = kmem_zalloc(ZONENAME_MAX, KM_SLEEP);
6267 6312 if ((err = copyinstr(zone_name, kname, ZONENAME_MAX, NULL)) != 0) {
6268 6313 kmem_free(kname, ZONENAME_MAX);
6269 6314 return (set_errno(err));
6270 6315 }
6271 6316
6272 6317 mutex_enter(&zonehash_lock);
6273 6318 zone = zone_find_all_by_name(kname);
6274 6319 kmem_free(kname, ZONENAME_MAX);
6275 6320 /*
6276 6321 * In a non-global zone, can only lookup global and own name.
6277 6322 * In Trusted Extensions zone label dominance rules apply.
6278 6323 */
6279 6324 if (zone == NULL ||
6280 6325 zone_status_get(zone) < ZONE_IS_READY ||
6281 6326 !zone_list_access(zone)) {
6282 6327 mutex_exit(&zonehash_lock);
6283 6328 return (set_errno(EINVAL));
6284 6329 } else {
6285 6330 zoneid = zone->zone_id;
6286 6331 mutex_exit(&zonehash_lock);
6287 6332 return (zoneid);
6288 6333 }
6289 6334 }
6290 6335
6291 6336 static int
6292 6337 zone_version(int *version_arg)
6293 6338 {
6294 6339 int version = ZONE_SYSCALL_API_VERSION;
6295 6340
6296 6341 if (copyout(&version, version_arg, sizeof (int)) != 0)
6297 6342 return (set_errno(EFAULT));
6298 6343 return (0);
6299 6344 }
6300 6345
6301 6346 /* ARGSUSED */
6302 6347 long
6303 6348 zone(int cmd, void *arg1, void *arg2, void *arg3, void *arg4)
6304 6349 {
6305 6350 zone_def zs;
6306 6351 int err;
6307 6352
6308 6353 switch (cmd) {
6309 6354 case ZONE_CREATE:
6310 6355 if (get_udatamodel() == DATAMODEL_NATIVE) {
6311 6356 if (copyin(arg1, &zs, sizeof (zone_def))) {
6312 6357 return (set_errno(EFAULT));
6313 6358 }
6314 6359 } else {
6315 6360 #ifdef _SYSCALL32_IMPL
6316 6361 zone_def32 zs32;
6317 6362
6318 6363 if (copyin(arg1, &zs32, sizeof (zone_def32))) {
6319 6364 return (set_errno(EFAULT));
6320 6365 }
6321 6366 zs.zone_name =
6322 6367 (const char *)(unsigned long)zs32.zone_name;
6323 6368 zs.zone_root =
6324 6369 (const char *)(unsigned long)zs32.zone_root;
6325 6370 zs.zone_privs =
6326 6371 (const struct priv_set *)
6327 6372 (unsigned long)zs32.zone_privs;
6328 6373 zs.zone_privssz = zs32.zone_privssz;
6329 6374 zs.rctlbuf = (caddr_t)(unsigned long)zs32.rctlbuf;
6330 6375 zs.rctlbufsz = zs32.rctlbufsz;
6331 6376 zs.zfsbuf = (caddr_t)(unsigned long)zs32.zfsbuf;
6332 6377 zs.zfsbufsz = zs32.zfsbufsz;
6333 6378 zs.extended_error =
6334 6379 (int *)(unsigned long)zs32.extended_error;
6335 6380 zs.match = zs32.match;
6336 6381 zs.doi = zs32.doi;
6337 6382 zs.label = (const bslabel_t *)(uintptr_t)zs32.label;
6338 6383 zs.flags = zs32.flags;
6339 6384 #else
6340 6385 panic("get_udatamodel() returned bogus result\n");
6341 6386 #endif
6342 6387 }
6343 6388
6344 6389 return (zone_create(zs.zone_name, zs.zone_root,
6345 6390 zs.zone_privs, zs.zone_privssz,
6346 6391 (caddr_t)zs.rctlbuf, zs.rctlbufsz,
6347 6392 (caddr_t)zs.zfsbuf, zs.zfsbufsz,
6348 6393 zs.extended_error, zs.match, zs.doi,
6349 6394 zs.label, zs.flags));
6350 6395 case ZONE_BOOT:
6351 6396 return (zone_boot((zoneid_t)(uintptr_t)arg1));
6352 6397 case ZONE_DESTROY:
6353 6398 return (zone_destroy((zoneid_t)(uintptr_t)arg1));
6354 6399 case ZONE_GETATTR:
6355 6400 return (zone_getattr((zoneid_t)(uintptr_t)arg1,
6356 6401 (int)(uintptr_t)arg2, arg3, (size_t)arg4));
6357 6402 case ZONE_SETATTR:
6358 6403 return (zone_setattr((zoneid_t)(uintptr_t)arg1,
6359 6404 (int)(uintptr_t)arg2, arg3, (size_t)arg4));
6360 6405 case ZONE_ENTER:
6361 6406 return (zone_enter((zoneid_t)(uintptr_t)arg1));
6362 6407 case ZONE_LIST:
6363 6408 return (zone_list((zoneid_t *)arg1, (uint_t *)arg2));
6364 6409 case ZONE_SHUTDOWN:
6365 6410 return (zone_shutdown((zoneid_t)(uintptr_t)arg1));
6366 6411 case ZONE_LOOKUP:
6367 6412 return (zone_lookup((const char *)arg1));
6368 6413 case ZONE_VERSION:
6369 6414 return (zone_version((int *)arg1));
6370 6415 case ZONE_ADD_DATALINK:
6371 6416 return (zone_add_datalink((zoneid_t)(uintptr_t)arg1,
6372 6417 (datalink_id_t)(uintptr_t)arg2));
6373 6418 case ZONE_DEL_DATALINK:
6374 6419 return (zone_remove_datalink((zoneid_t)(uintptr_t)arg1,
6375 6420 (datalink_id_t)(uintptr_t)arg2));
6376 6421 case ZONE_CHECK_DATALINK: {
6377 6422 zoneid_t zoneid;
6378 6423 boolean_t need_copyout;
6379 6424
6380 6425 if (copyin(arg1, &zoneid, sizeof (zoneid)) != 0)
6381 6426 return (EFAULT);
6382 6427 need_copyout = (zoneid == ALL_ZONES);
6383 6428 err = zone_check_datalink(&zoneid,
6384 6429 (datalink_id_t)(uintptr_t)arg2);
6385 6430 if (err == 0 && need_copyout) {
6386 6431 if (copyout(&zoneid, arg1, sizeof (zoneid)) != 0)
6387 6432 err = EFAULT;
6388 6433 }
6389 6434 return (err == 0 ? 0 : set_errno(err));
6390 6435 }
6391 6436 case ZONE_LIST_DATALINK:
6392 6437 return (zone_list_datalink((zoneid_t)(uintptr_t)arg1,
6393 6438 (int *)arg2, (datalink_id_t *)(uintptr_t)arg3));
6394 6439 default:
6395 6440 return (set_errno(EINVAL));
6396 6441 }
6397 6442 }
6398 6443
6399 6444 struct zarg {
6400 6445 zone_t *zone;
6401 6446 zone_cmd_arg_t arg;
6402 6447 };
6403 6448
6404 6449 static int
6405 6450 zone_lookup_door(const char *zone_name, door_handle_t *doorp)
6406 6451 {
6407 6452 char *buf;
6408 6453 size_t buflen;
6409 6454 int error;
6410 6455
6411 6456 buflen = sizeof (ZONE_DOOR_PATH) + strlen(zone_name);
6412 6457 buf = kmem_alloc(buflen, KM_SLEEP);
6413 6458 (void) snprintf(buf, buflen, ZONE_DOOR_PATH, zone_name);
6414 6459 error = door_ki_open(buf, doorp);
6415 6460 kmem_free(buf, buflen);
6416 6461 return (error);
6417 6462 }
6418 6463
6419 6464 static void
6420 6465 zone_release_door(door_handle_t *doorp)
6421 6466 {
6422 6467 door_ki_rele(*doorp);
6423 6468 *doorp = NULL;
6424 6469 }
6425 6470
6426 6471 static void
6427 6472 zone_ki_call_zoneadmd(struct zarg *zargp)
6428 6473 {
6429 6474 door_handle_t door = NULL;
6430 6475 door_arg_t darg, save_arg;
6431 6476 char *zone_name;
6432 6477 size_t zone_namelen;
6433 6478 zoneid_t zoneid;
6434 6479 zone_t *zone;
6435 6480 zone_cmd_arg_t arg;
6436 6481 uint64_t uniqid;
6437 6482 size_t size;
6438 6483 int error;
6439 6484 int retry;
6440 6485
6441 6486 zone = zargp->zone;
6442 6487 arg = zargp->arg;
6443 6488 kmem_free(zargp, sizeof (*zargp));
6444 6489
6445 6490 zone_namelen = strlen(zone->zone_name) + 1;
6446 6491 zone_name = kmem_alloc(zone_namelen, KM_SLEEP);
6447 6492 bcopy(zone->zone_name, zone_name, zone_namelen);
6448 6493 zoneid = zone->zone_id;
6449 6494 uniqid = zone->zone_uniqid;
6450 6495 /*
6451 6496 * zoneadmd may be down, but at least we can empty out the zone.
6452 6497 * We can ignore the return value of zone_empty() since we're called
6453 6498 * from a kernel thread and know we won't be delivered any signals.
6454 6499 */
6455 6500 ASSERT(curproc == &p0);
6456 6501 (void) zone_empty(zone);
6457 6502 ASSERT(zone_status_get(zone) >= ZONE_IS_EMPTY);
6458 6503 zone_rele(zone);
6459 6504
6460 6505 size = sizeof (arg);
6461 6506 darg.rbuf = (char *)&arg;
6462 6507 darg.data_ptr = (char *)&arg;
6463 6508 darg.rsize = size;
6464 6509 darg.data_size = size;
6465 6510 darg.desc_ptr = NULL;
6466 6511 darg.desc_num = 0;
6467 6512
6468 6513 save_arg = darg;
6469 6514 /*
6470 6515 * Since we're not holding a reference to the zone, any number of
6471 6516 * things can go wrong, including the zone disappearing before we get a
6472 6517 * chance to talk to zoneadmd.
6473 6518 */
6474 6519 for (retry = 0; /* forever */; retry++) {
6475 6520 if (door == NULL &&
6476 6521 (error = zone_lookup_door(zone_name, &door)) != 0) {
6477 6522 goto next;
6478 6523 }
6479 6524 ASSERT(door != NULL);
6480 6525
6481 6526 if ((error = door_ki_upcall_limited(door, &darg, NULL,
6482 6527 SIZE_MAX, 0)) == 0) {
6483 6528 break;
6484 6529 }
6485 6530 switch (error) {
6486 6531 case EINTR:
6487 6532 /* FALLTHROUGH */
6488 6533 case EAGAIN: /* process may be forking */
6489 6534 /*
6490 6535 * Back off for a bit
6491 6536 */
6492 6537 break;
6493 6538 case EBADF:
6494 6539 zone_release_door(&door);
6495 6540 if (zone_lookup_door(zone_name, &door) != 0) {
6496 6541 /*
6497 6542 * zoneadmd may be dead, but it may come back to
6498 6543 * life later.
6499 6544 */
6500 6545 break;
6501 6546 }
6502 6547 break;
6503 6548 default:
6504 6549 cmn_err(CE_WARN,
6505 6550 "zone_ki_call_zoneadmd: door_ki_upcall error %d\n",
6506 6551 error);
6507 6552 goto out;
6508 6553 }
6509 6554 next:
6510 6555 /*
6511 6556 * If this isn't the same zone_t that we originally had in mind,
6512 6557 * then this is the same as if two kadmin requests come in at
6513 6558 * the same time: the first one wins. This means we lose, so we
6514 6559 * bail.
6515 6560 */
6516 6561 if ((zone = zone_find_by_id(zoneid)) == NULL) {
6517 6562 /*
6518 6563 * Problem is solved.
6519 6564 */
6520 6565 break;
6521 6566 }
6522 6567 if (zone->zone_uniqid != uniqid) {
6523 6568 /*
6524 6569 * zoneid recycled
6525 6570 */
6526 6571 zone_rele(zone);
6527 6572 break;
6528 6573 }
6529 6574 /*
6530 6575 * We could zone_status_timedwait(), but there doesn't seem to
6531 6576 * be much point in doing that (plus, it would mean that
6532 6577 * zone_free() isn't called until this thread exits).
6533 6578 */
6534 6579 zone_rele(zone);
6535 6580 delay(hz);
6536 6581 darg = save_arg;
6537 6582 }
6538 6583 out:
6539 6584 if (door != NULL) {
6540 6585 zone_release_door(&door);
6541 6586 }
6542 6587 kmem_free(zone_name, zone_namelen);
6543 6588 thread_exit();
6544 6589 }
6545 6590
6546 6591 /*
6547 6592 * Entry point for uadmin() to tell the zone to go away or reboot. Analog to
6548 6593 * kadmin(). The caller is a process in the zone.
6549 6594 *
6550 6595 * In order to shutdown the zone, we will hand off control to zoneadmd
6551 6596 * (running in the global zone) via a door. We do a half-hearted job at
6552 6597 * killing all processes in the zone, create a kernel thread to contact
6553 6598 * zoneadmd, and make note of the "uniqid" of the zone. The uniqid is
6554 6599 * a form of generation number used to let zoneadmd (as well as
6555 6600 * zone_destroy()) know exactly which zone they're re talking about.
6556 6601 */
6557 6602 int
6558 6603 zone_kadmin(int cmd, int fcn, const char *mdep, cred_t *credp)
6559 6604 {
6560 6605 struct zarg *zargp;
6561 6606 zone_cmd_t zcmd;
6562 6607 zone_t *zone;
6563 6608
6564 6609 zone = curproc->p_zone;
6565 6610 ASSERT(getzoneid() != GLOBAL_ZONEID);
6566 6611
6567 6612 switch (cmd) {
6568 6613 case A_SHUTDOWN:
6569 6614 switch (fcn) {
6570 6615 case AD_HALT:
6571 6616 case AD_POWEROFF:
6572 6617 zcmd = Z_HALT;
6573 6618 break;
6574 6619 case AD_BOOT:
6575 6620 zcmd = Z_REBOOT;
6576 6621 break;
6577 6622 case AD_IBOOT:
6578 6623 case AD_SBOOT:
6579 6624 case AD_SIBOOT:
6580 6625 case AD_NOSYNC:
6581 6626 return (ENOTSUP);
6582 6627 default:
6583 6628 return (EINVAL);
6584 6629 }
6585 6630 break;
6586 6631 case A_REBOOT:
6587 6632 zcmd = Z_REBOOT;
6588 6633 break;
6589 6634 case A_FTRACE:
6590 6635 case A_REMOUNT:
6591 6636 case A_FREEZE:
6592 6637 case A_DUMP:
6593 6638 case A_CONFIG:
6594 6639 return (ENOTSUP);
6595 6640 default:
6596 6641 ASSERT(cmd != A_SWAPCTL); /* handled by uadmin() */
6597 6642 return (EINVAL);
6598 6643 }
6599 6644
6600 6645 if (secpolicy_zone_admin(credp, B_FALSE))
6601 6646 return (EPERM);
6602 6647 mutex_enter(&zone_status_lock);
6603 6648
6604 6649 /*
6605 6650 * zone_status can't be ZONE_IS_EMPTY or higher since curproc
6606 6651 * is in the zone.
6607 6652 */
6608 6653 ASSERT(zone_status_get(zone) < ZONE_IS_EMPTY);
6609 6654 if (zone_status_get(zone) > ZONE_IS_RUNNING) {
6610 6655 /*
6611 6656 * This zone is already on its way down.
6612 6657 */
6613 6658 mutex_exit(&zone_status_lock);
6614 6659 return (0);
6615 6660 }
6616 6661 /*
6617 6662 * Prevent future zone_enter()s
6618 6663 */
6619 6664 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN);
6620 6665 mutex_exit(&zone_status_lock);
6621 6666
6622 6667 /*
6623 6668 * Kill everyone now and call zoneadmd later.
6624 6669 * zone_ki_call_zoneadmd() will do a more thorough job of this
6625 6670 * later.
6626 6671 */
6627 6672 killall(zone->zone_id);
6628 6673 /*
6629 6674 * Now, create the thread to contact zoneadmd and do the rest of the
6630 6675 * work. This thread can't be created in our zone otherwise
6631 6676 * zone_destroy() would deadlock.
6632 6677 */
6633 6678 zargp = kmem_zalloc(sizeof (*zargp), KM_SLEEP);
6634 6679 zargp->arg.cmd = zcmd;
6635 6680 zargp->arg.uniqid = zone->zone_uniqid;
6636 6681 zargp->zone = zone;
6637 6682 (void) strcpy(zargp->arg.locale, "C");
6638 6683 /* mdep was already copied in for us by uadmin */
6639 6684 if (mdep != NULL)
6640 6685 (void) strlcpy(zargp->arg.bootbuf, mdep,
6641 6686 sizeof (zargp->arg.bootbuf));
6642 6687 zone_hold(zone);
6643 6688
6644 6689 (void) thread_create(NULL, 0, zone_ki_call_zoneadmd, zargp, 0, &p0,
6645 6690 TS_RUN, minclsyspri);
6646 6691 exit(CLD_EXITED, 0);
6647 6692
6648 6693 return (EINVAL);
6649 6694 }
6650 6695
6651 6696 /*
6652 6697 * Entry point so kadmin(A_SHUTDOWN, ...) can set the global zone's
6653 6698 * status to ZONE_IS_SHUTTING_DOWN.
6654 6699 *
6655 6700 * This function also shuts down all running zones to ensure that they won't
6656 6701 * fork new processes.
6657 6702 */
6658 6703 void
6659 6704 zone_shutdown_global(void)
6660 6705 {
6661 6706 zone_t *current_zonep;
6662 6707
6663 6708 ASSERT(INGLOBALZONE(curproc));
6664 6709 mutex_enter(&zonehash_lock);
6665 6710 mutex_enter(&zone_status_lock);
6666 6711
6667 6712 /* Modify the global zone's status first. */
6668 6713 ASSERT(zone_status_get(global_zone) == ZONE_IS_RUNNING);
6669 6714 zone_status_set(global_zone, ZONE_IS_SHUTTING_DOWN);
6670 6715
6671 6716 /*
6672 6717 * Now change the states of all running zones to ZONE_IS_SHUTTING_DOWN.
6673 6718 * We don't mark all zones with ZONE_IS_SHUTTING_DOWN because doing so
6674 6719 * could cause assertions to fail (e.g., assertions about a zone's
6675 6720 * state during initialization, readying, or booting) or produce races.
6676 6721 * We'll let threads continue to initialize and ready new zones: they'll
6677 6722 * fail to boot the new zones when they see that the global zone is
6678 6723 * shutting down.
6679 6724 */
6680 6725 for (current_zonep = list_head(&zone_active); current_zonep != NULL;
6681 6726 current_zonep = list_next(&zone_active, current_zonep)) {
6682 6727 if (zone_status_get(current_zonep) == ZONE_IS_RUNNING)
6683 6728 zone_status_set(current_zonep, ZONE_IS_SHUTTING_DOWN);
6684 6729 }
6685 6730 mutex_exit(&zone_status_lock);
6686 6731 mutex_exit(&zonehash_lock);
6687 6732 }
6688 6733
6689 6734 /*
6690 6735 * Returns true if the named dataset is visible in the current zone.
6691 6736 * The 'write' parameter is set to 1 if the dataset is also writable.
6692 6737 */
6693 6738 int
6694 6739 zone_dataset_visible(const char *dataset, int *write)
6695 6740 {
6696 6741 static int zfstype = -1;
6697 6742 zone_dataset_t *zd;
6698 6743 size_t len;
6699 6744 zone_t *zone = curproc->p_zone;
6700 6745 const char *name = NULL;
6701 6746 vfs_t *vfsp = NULL;
6702 6747
6703 6748 if (dataset[0] == '\0')
6704 6749 return (0);
6705 6750
6706 6751 /*
6707 6752 * Walk the list once, looking for datasets which match exactly, or
6708 6753 * specify a dataset underneath an exported dataset. If found, return
6709 6754 * true and note that it is writable.
6710 6755 */
6711 6756 for (zd = list_head(&zone->zone_datasets); zd != NULL;
6712 6757 zd = list_next(&zone->zone_datasets, zd)) {
6713 6758
6714 6759 len = strlen(zd->zd_dataset);
6715 6760 if (strlen(dataset) >= len &&
6716 6761 bcmp(dataset, zd->zd_dataset, len) == 0 &&
6717 6762 (dataset[len] == '\0' || dataset[len] == '/' ||
6718 6763 dataset[len] == '@')) {
6719 6764 if (write)
6720 6765 *write = 1;
6721 6766 return (1);
6722 6767 }
6723 6768 }
6724 6769
6725 6770 /*
6726 6771 * Walk the list a second time, searching for datasets which are parents
6727 6772 * of exported datasets. These should be visible, but read-only.
6728 6773 *
6729 6774 * Note that we also have to support forms such as 'pool/dataset/', with
6730 6775 * a trailing slash.
6731 6776 */
6732 6777 for (zd = list_head(&zone->zone_datasets); zd != NULL;
6733 6778 zd = list_next(&zone->zone_datasets, zd)) {
6734 6779
6735 6780 len = strlen(dataset);
6736 6781 if (dataset[len - 1] == '/')
6737 6782 len--; /* Ignore trailing slash */
6738 6783 if (len < strlen(zd->zd_dataset) &&
6739 6784 bcmp(dataset, zd->zd_dataset, len) == 0 &&
6740 6785 zd->zd_dataset[len] == '/') {
6741 6786 if (write)
6742 6787 *write = 0;
6743 6788 return (1);
6744 6789 }
6745 6790 }
6746 6791
6747 6792 /*
6748 6793 * We reach here if the given dataset is not found in the zone_dataset
6749 6794 * list. Check if this dataset was added as a filesystem (ie. "add fs")
6750 6795 * instead of delegation. For this we search for the dataset in the
6751 6796 * zone_vfslist of this zone. If found, return true and note that it is
6752 6797 * not writable.
6753 6798 */
6754 6799
6755 6800 /*
6756 6801 * Initialize zfstype if it is not initialized yet.
6757 6802 */
6758 6803 if (zfstype == -1) {
6759 6804 struct vfssw *vswp = vfs_getvfssw("zfs");
6760 6805 zfstype = vswp - vfssw;
6761 6806 vfs_unrefvfssw(vswp);
6762 6807 }
6763 6808
6764 6809 vfs_list_read_lock();
6765 6810 vfsp = zone->zone_vfslist;
6766 6811 do {
6767 6812 ASSERT(vfsp);
6768 6813 if (vfsp->vfs_fstype == zfstype) {
6769 6814 name = refstr_value(vfsp->vfs_resource);
6770 6815
6771 6816 /*
6772 6817 * Check if we have an exact match.
6773 6818 */
6774 6819 if (strcmp(dataset, name) == 0) {
6775 6820 vfs_list_unlock();
6776 6821 if (write)
6777 6822 *write = 0;
6778 6823 return (1);
6779 6824 }
6780 6825 /*
6781 6826 * We need to check if we are looking for parents of
6782 6827 * a dataset. These should be visible, but read-only.
6783 6828 */
6784 6829 len = strlen(dataset);
6785 6830 if (dataset[len - 1] == '/')
6786 6831 len--;
6787 6832
6788 6833 if (len < strlen(name) &&
6789 6834 bcmp(dataset, name, len) == 0 && name[len] == '/') {
6790 6835 vfs_list_unlock();
6791 6836 if (write)
6792 6837 *write = 0;
6793 6838 return (1);
6794 6839 }
6795 6840 }
6796 6841 vfsp = vfsp->vfs_zone_next;
6797 6842 } while (vfsp != zone->zone_vfslist);
6798 6843
6799 6844 vfs_list_unlock();
6800 6845 return (0);
6801 6846 }
6802 6847
6803 6848 /*
6804 6849 * zone_find_by_any_path() -
6805 6850 *
6806 6851 * kernel-private routine similar to zone_find_by_path(), but which
6807 6852 * effectively compares against zone paths rather than zonerootpath
6808 6853 * (i.e., the last component of zonerootpaths, which should be "root/",
6809 6854 * are not compared.) This is done in order to accurately identify all
6810 6855 * paths, whether zone-visible or not, including those which are parallel
6811 6856 * to /root/, such as /dev/, /home/, etc...
6812 6857 *
6813 6858 * If the specified path does not fall under any zone path then global
6814 6859 * zone is returned.
6815 6860 *
6816 6861 * The treat_abs parameter indicates whether the path should be treated as
6817 6862 * an absolute path although it does not begin with "/". (This supports
6818 6863 * nfs mount syntax such as host:any/path.)
6819 6864 *
6820 6865 * The caller is responsible for zone_rele of the returned zone.
6821 6866 */
6822 6867 zone_t *
6823 6868 zone_find_by_any_path(const char *path, boolean_t treat_abs)
6824 6869 {
6825 6870 zone_t *zone;
6826 6871 int path_offset = 0;
6827 6872
6828 6873 if (path == NULL) {
6829 6874 zone_hold(global_zone);
6830 6875 return (global_zone);
6831 6876 }
6832 6877
6833 6878 if (*path != '/') {
6834 6879 ASSERT(treat_abs);
6835 6880 path_offset = 1;
6836 6881 }
6837 6882
6838 6883 mutex_enter(&zonehash_lock);
6839 6884 for (zone = list_head(&zone_active); zone != NULL;
6840 6885 zone = list_next(&zone_active, zone)) {
6841 6886 char *c;
6842 6887 size_t pathlen;
6843 6888 char *rootpath_start;
6844 6889
6845 6890 if (zone == global_zone) /* skip global zone */
6846 6891 continue;
6847 6892
6848 6893 /* scan backwards to find start of last component */
6849 6894 c = zone->zone_rootpath + zone->zone_rootpathlen - 2;
6850 6895 do {
6851 6896 c--;
6852 6897 } while (*c != '/');
6853 6898
6854 6899 pathlen = c - zone->zone_rootpath + 1 - path_offset;
6855 6900 rootpath_start = (zone->zone_rootpath + path_offset);
6856 6901 if (strncmp(path, rootpath_start, pathlen) == 0)
6857 6902 break;
6858 6903 }
6859 6904 if (zone == NULL)
6860 6905 zone = global_zone;
6861 6906 zone_hold(zone);
6862 6907 mutex_exit(&zonehash_lock);
6863 6908 return (zone);
6864 6909 }
6865 6910
6866 6911 /*
6867 6912 * Finds a zone_dl_t with the given linkid in the given zone. Returns the
6868 6913 * zone_dl_t pointer if found, and NULL otherwise.
6869 6914 */
6870 6915 static zone_dl_t *
6871 6916 zone_find_dl(zone_t *zone, datalink_id_t linkid)
6872 6917 {
6873 6918 zone_dl_t *zdl;
6874 6919
6875 6920 ASSERT(mutex_owned(&zone->zone_lock));
6876 6921 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL;
6877 6922 zdl = list_next(&zone->zone_dl_list, zdl)) {
6878 6923 if (zdl->zdl_id == linkid)
6879 6924 break;
6880 6925 }
6881 6926 return (zdl);
6882 6927 }
6883 6928
6884 6929 static boolean_t
6885 6930 zone_dl_exists(zone_t *zone, datalink_id_t linkid)
6886 6931 {
6887 6932 boolean_t exists;
6888 6933
6889 6934 mutex_enter(&zone->zone_lock);
6890 6935 exists = (zone_find_dl(zone, linkid) != NULL);
6891 6936 mutex_exit(&zone->zone_lock);
6892 6937 return (exists);
6893 6938 }
6894 6939
6895 6940 /*
6896 6941 * Add an data link name for the zone.
6897 6942 */
6898 6943 static int
6899 6944 zone_add_datalink(zoneid_t zoneid, datalink_id_t linkid)
6900 6945 {
6901 6946 zone_dl_t *zdl;
6902 6947 zone_t *zone;
6903 6948 zone_t *thiszone;
6904 6949
6905 6950 if ((thiszone = zone_find_by_id(zoneid)) == NULL)
6906 6951 return (set_errno(ENXIO));
6907 6952
6908 6953 /* Verify that the datalink ID doesn't already belong to a zone. */
6909 6954 mutex_enter(&zonehash_lock);
6910 6955 for (zone = list_head(&zone_active); zone != NULL;
6911 6956 zone = list_next(&zone_active, zone)) {
6912 6957 if (zone_dl_exists(zone, linkid)) {
6913 6958 mutex_exit(&zonehash_lock);
6914 6959 zone_rele(thiszone);
6915 6960 return (set_errno((zone == thiszone) ? EEXIST : EPERM));
6916 6961 }
6917 6962 }
6918 6963
6919 6964 zdl = kmem_zalloc(sizeof (*zdl), KM_SLEEP);
6920 6965 zdl->zdl_id = linkid;
6921 6966 zdl->zdl_net = NULL;
6922 6967 mutex_enter(&thiszone->zone_lock);
6923 6968 list_insert_head(&thiszone->zone_dl_list, zdl);
6924 6969 mutex_exit(&thiszone->zone_lock);
6925 6970 mutex_exit(&zonehash_lock);
6926 6971 zone_rele(thiszone);
6927 6972 return (0);
6928 6973 }
6929 6974
6930 6975 static int
6931 6976 zone_remove_datalink(zoneid_t zoneid, datalink_id_t linkid)
6932 6977 {
6933 6978 zone_dl_t *zdl;
6934 6979 zone_t *zone;
6935 6980 int err = 0;
6936 6981
6937 6982 if ((zone = zone_find_by_id(zoneid)) == NULL)
6938 6983 return (set_errno(EINVAL));
6939 6984
6940 6985 mutex_enter(&zone->zone_lock);
6941 6986 if ((zdl = zone_find_dl(zone, linkid)) == NULL) {
6942 6987 err = ENXIO;
6943 6988 } else {
6944 6989 list_remove(&zone->zone_dl_list, zdl);
6945 6990 nvlist_free(zdl->zdl_net);
6946 6991 kmem_free(zdl, sizeof (zone_dl_t));
6947 6992 }
6948 6993 mutex_exit(&zone->zone_lock);
6949 6994 zone_rele(zone);
6950 6995 return (err == 0 ? 0 : set_errno(err));
6951 6996 }
6952 6997
6953 6998 /*
6954 6999 * Using the zoneidp as ALL_ZONES, we can lookup which zone has been assigned
6955 7000 * the linkid. Otherwise we just check if the specified zoneidp has been
6956 7001 * assigned the supplied linkid.
6957 7002 */
6958 7003 int
6959 7004 zone_check_datalink(zoneid_t *zoneidp, datalink_id_t linkid)
6960 7005 {
6961 7006 zone_t *zone;
6962 7007 int err = ENXIO;
6963 7008
6964 7009 if (*zoneidp != ALL_ZONES) {
6965 7010 if ((zone = zone_find_by_id(*zoneidp)) != NULL) {
6966 7011 if (zone_dl_exists(zone, linkid))
6967 7012 err = 0;
6968 7013 zone_rele(zone);
6969 7014 }
6970 7015 return (err);
6971 7016 }
6972 7017
6973 7018 mutex_enter(&zonehash_lock);
6974 7019 for (zone = list_head(&zone_active); zone != NULL;
6975 7020 zone = list_next(&zone_active, zone)) {
6976 7021 if (zone_dl_exists(zone, linkid)) {
6977 7022 *zoneidp = zone->zone_id;
6978 7023 err = 0;
6979 7024 break;
6980 7025 }
6981 7026 }
6982 7027 mutex_exit(&zonehash_lock);
6983 7028 return (err);
6984 7029 }
6985 7030
6986 7031 /*
6987 7032 * Get the list of datalink IDs assigned to a zone.
6988 7033 *
6989 7034 * On input, *nump is the number of datalink IDs that can fit in the supplied
6990 7035 * idarray. Upon return, *nump is either set to the number of datalink IDs
6991 7036 * that were placed in the array if the array was large enough, or to the
6992 7037 * number of datalink IDs that the function needs to place in the array if the
6993 7038 * array is too small.
6994 7039 */
6995 7040 static int
6996 7041 zone_list_datalink(zoneid_t zoneid, int *nump, datalink_id_t *idarray)
6997 7042 {
6998 7043 uint_t num, dlcount;
6999 7044 zone_t *zone;
7000 7045 zone_dl_t *zdl;
7001 7046 datalink_id_t *idptr = idarray;
7002 7047
7003 7048 if (copyin(nump, &dlcount, sizeof (dlcount)) != 0)
7004 7049 return (set_errno(EFAULT));
7005 7050 if ((zone = zone_find_by_id(zoneid)) == NULL)
7006 7051 return (set_errno(ENXIO));
7007 7052
7008 7053 num = 0;
7009 7054 mutex_enter(&zone->zone_lock);
7010 7055 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL;
7011 7056 zdl = list_next(&zone->zone_dl_list, zdl)) {
7012 7057 /*
7013 7058 * If the list is bigger than what the caller supplied, just
7014 7059 * count, don't do copyout.
7015 7060 */
7016 7061 if (++num > dlcount)
7017 7062 continue;
7018 7063 if (copyout(&zdl->zdl_id, idptr, sizeof (*idptr)) != 0) {
7019 7064 mutex_exit(&zone->zone_lock);
7020 7065 zone_rele(zone);
7021 7066 return (set_errno(EFAULT));
7022 7067 }
7023 7068 idptr++;
7024 7069 }
7025 7070 mutex_exit(&zone->zone_lock);
7026 7071 zone_rele(zone);
7027 7072
7028 7073 /* Increased or decreased, caller should be notified. */
7029 7074 if (num != dlcount) {
7030 7075 if (copyout(&num, nump, sizeof (num)) != 0)
7031 7076 return (set_errno(EFAULT));
7032 7077 }
7033 7078 return (0);
7034 7079 }
7035 7080
7036 7081 /*
7037 7082 * Public interface for looking up a zone by zoneid. It's a customized version
7038 7083 * for netstack_zone_create(). It can only be called from the zsd create
7039 7084 * callbacks, since it doesn't have reference on the zone structure hence if
7040 7085 * it is called elsewhere the zone could disappear after the zonehash_lock
7041 7086 * is dropped.
7042 7087 *
7043 7088 * Furthermore it
7044 7089 * 1. Doesn't check the status of the zone.
7045 7090 * 2. It will be called even before zone_init is called, in that case the
7046 7091 * address of zone0 is returned directly, and netstack_zone_create()
7047 7092 * will only assign a value to zone0.zone_netstack, won't break anything.
7048 7093 * 3. Returns without the zone being held.
7049 7094 */
7050 7095 zone_t *
7051 7096 zone_find_by_id_nolock(zoneid_t zoneid)
7052 7097 {
7053 7098 zone_t *zone;
7054 7099
7055 7100 mutex_enter(&zonehash_lock);
7056 7101 if (zonehashbyid == NULL)
7057 7102 zone = &zone0;
7058 7103 else
7059 7104 zone = zone_find_all_by_id(zoneid);
7060 7105 mutex_exit(&zonehash_lock);
7061 7106 return (zone);
7062 7107 }
7063 7108
7064 7109 /*
7065 7110 * Walk the datalinks for a given zone
7066 7111 */
7067 7112 int
7068 7113 zone_datalink_walk(zoneid_t zoneid, int (*cb)(datalink_id_t, void *),
7069 7114 void *data)
7070 7115 {
7071 7116 zone_t *zone;
7072 7117 zone_dl_t *zdl;
7073 7118 datalink_id_t *idarray;
7074 7119 uint_t idcount = 0;
7075 7120 int i, ret = 0;
7076 7121
7077 7122 if ((zone = zone_find_by_id(zoneid)) == NULL)
7078 7123 return (ENOENT);
7079 7124
7080 7125 /*
7081 7126 * We first build an array of linkid's so that we can walk these and
7082 7127 * execute the callback with the zone_lock dropped.
7083 7128 */
7084 7129 mutex_enter(&zone->zone_lock);
7085 7130 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL;
7086 7131 zdl = list_next(&zone->zone_dl_list, zdl)) {
7087 7132 idcount++;
7088 7133 }
7089 7134
7090 7135 if (idcount == 0) {
7091 7136 mutex_exit(&zone->zone_lock);
7092 7137 zone_rele(zone);
7093 7138 return (0);
7094 7139 }
7095 7140
7096 7141 idarray = kmem_alloc(sizeof (datalink_id_t) * idcount, KM_NOSLEEP);
7097 7142 if (idarray == NULL) {
7098 7143 mutex_exit(&zone->zone_lock);
7099 7144 zone_rele(zone);
7100 7145 return (ENOMEM);
7101 7146 }
7102 7147
7103 7148 for (i = 0, zdl = list_head(&zone->zone_dl_list); zdl != NULL;
7104 7149 i++, zdl = list_next(&zone->zone_dl_list, zdl)) {
7105 7150 idarray[i] = zdl->zdl_id;
7106 7151 }
7107 7152
7108 7153 mutex_exit(&zone->zone_lock);
7109 7154
7110 7155 for (i = 0; i < idcount && ret == 0; i++) {
7111 7156 if ((ret = (*cb)(idarray[i], data)) != 0)
7112 7157 break;
7113 7158 }
7114 7159
7115 7160 zone_rele(zone);
7116 7161 kmem_free(idarray, sizeof (datalink_id_t) * idcount);
7117 7162 return (ret);
7118 7163 }
7119 7164
7120 7165 static char *
7121 7166 zone_net_type2name(int type)
7122 7167 {
7123 7168 switch (type) {
7124 7169 case ZONE_NETWORK_ADDRESS:
7125 7170 return (ZONE_NET_ADDRNAME);
7126 7171 case ZONE_NETWORK_DEFROUTER:
7127 7172 return (ZONE_NET_RTRNAME);
7128 7173 default:
7129 7174 return (NULL);
7130 7175 }
7131 7176 }
7132 7177
7133 7178 static int
7134 7179 zone_set_network(zoneid_t zoneid, zone_net_data_t *znbuf)
7135 7180 {
7136 7181 zone_t *zone;
7137 7182 zone_dl_t *zdl;
7138 7183 nvlist_t *nvl;
7139 7184 int err = 0;
7140 7185 uint8_t *new = NULL;
7141 7186 char *nvname;
7142 7187 int bufsize;
7143 7188 datalink_id_t linkid = znbuf->zn_linkid;
7144 7189
7145 7190 if (secpolicy_zone_config(CRED()) != 0)
7146 7191 return (set_errno(EPERM));
7147 7192
7148 7193 if (zoneid == GLOBAL_ZONEID)
7149 7194 return (set_errno(EINVAL));
7150 7195
7151 7196 nvname = zone_net_type2name(znbuf->zn_type);
7152 7197 bufsize = znbuf->zn_len;
7153 7198 new = znbuf->zn_val;
7154 7199 if (nvname == NULL)
7155 7200 return (set_errno(EINVAL));
7156 7201
7157 7202 if ((zone = zone_find_by_id(zoneid)) == NULL) {
7158 7203 return (set_errno(EINVAL));
7159 7204 }
7160 7205
7161 7206 mutex_enter(&zone->zone_lock);
7162 7207 if ((zdl = zone_find_dl(zone, linkid)) == NULL) {
7163 7208 err = ENXIO;
7164 7209 goto done;
7165 7210 }
7166 7211 if ((nvl = zdl->zdl_net) == NULL) {
7167 7212 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP)) {
7168 7213 err = ENOMEM;
7169 7214 goto done;
7170 7215 } else {
7171 7216 zdl->zdl_net = nvl;
7172 7217 }
7173 7218 }
7174 7219 if (nvlist_exists(nvl, nvname)) {
7175 7220 err = EINVAL;
7176 7221 goto done;
7177 7222 }
7178 7223 err = nvlist_add_uint8_array(nvl, nvname, new, bufsize);
7179 7224 ASSERT(err == 0);
7180 7225 done:
7181 7226 mutex_exit(&zone->zone_lock);
7182 7227 zone_rele(zone);
7183 7228 if (err != 0)
7184 7229 return (set_errno(err));
7185 7230 else
7186 7231 return (0);
7187 7232 }
7188 7233
7189 7234 static int
7190 7235 zone_get_network(zoneid_t zoneid, zone_net_data_t *znbuf)
7191 7236 {
7192 7237 zone_t *zone;
7193 7238 zone_dl_t *zdl;
7194 7239 nvlist_t *nvl;
7195 7240 uint8_t *ptr;
7196 7241 uint_t psize;
7197 7242 int err = 0;
7198 7243 char *nvname;
7199 7244 int bufsize;
7200 7245 void *buf;
7201 7246 datalink_id_t linkid = znbuf->zn_linkid;
7202 7247
7203 7248 if (zoneid == GLOBAL_ZONEID)
7204 7249 return (set_errno(EINVAL));
7205 7250
7206 7251 nvname = zone_net_type2name(znbuf->zn_type);
7207 7252 bufsize = znbuf->zn_len;
7208 7253 buf = znbuf->zn_val;
7209 7254
7210 7255 if (nvname == NULL)
7211 7256 return (set_errno(EINVAL));
7212 7257 if ((zone = zone_find_by_id(zoneid)) == NULL)
7213 7258 return (set_errno(EINVAL));
7214 7259
7215 7260 mutex_enter(&zone->zone_lock);
7216 7261 if ((zdl = zone_find_dl(zone, linkid)) == NULL) {
7217 7262 err = ENXIO;
7218 7263 goto done;
7219 7264 }
7220 7265 if ((nvl = zdl->zdl_net) == NULL || !nvlist_exists(nvl, nvname)) {
7221 7266 err = ENOENT;
7222 7267 goto done;
7223 7268 }
7224 7269 err = nvlist_lookup_uint8_array(nvl, nvname, &ptr, &psize);
7225 7270 ASSERT(err == 0);
7226 7271
7227 7272 if (psize > bufsize) {
7228 7273 err = ENOBUFS;
7229 7274 goto done;
7230 7275 }
7231 7276 znbuf->zn_len = psize;
7232 7277 bcopy(ptr, buf, psize);
7233 7278 done:
7234 7279 mutex_exit(&zone->zone_lock);
7235 7280 zone_rele(zone);
7236 7281 if (err != 0)
7237 7282 return (set_errno(err));
7238 7283 else
7239 7284 return (0);
7240 7285 }
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