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