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 2015, 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 rctl_qty_t 1490 zone_shmmax_usage(rctl_t *rctl, struct proc *p) 1491 { 1492 ASSERT(MUTEX_HELD(&p->p_lock)); 1493 return (p->p_zone->zone_shmmax); 1494 } 1495 1496 /*ARGSUSED*/ 1497 static int 1498 zone_shmmax_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rval, 1499 rctl_qty_t incr, uint_t flags) 1500 { 1501 rctl_qty_t v; 1502 ASSERT(MUTEX_HELD(&p->p_lock)); 1503 ASSERT(e->rcep_t == RCENTITY_ZONE); 1504 v = e->rcep_p.zone->zone_shmmax + incr; 1505 if (v > rval->rcv_value) 1506 return (1); 1507 return (0); 1508 } 1509 1510 static rctl_ops_t zone_shmmax_ops = { 1511 rcop_no_action, 1512 zone_shmmax_usage, 1513 rcop_no_set, 1514 zone_shmmax_test 1515 }; 1516 1517 /*ARGSUSED*/ 1518 static rctl_qty_t 1519 zone_shmmni_usage(rctl_t *rctl, struct proc *p) 1520 { 1521 ASSERT(MUTEX_HELD(&p->p_lock)); 1522 return (p->p_zone->zone_ipc.ipcq_shmmni); 1523 } 1524 1525 /*ARGSUSED*/ 1526 static int 1527 zone_shmmni_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rval, 1528 rctl_qty_t incr, uint_t flags) 1529 { 1530 rctl_qty_t v; 1531 ASSERT(MUTEX_HELD(&p->p_lock)); 1532 ASSERT(e->rcep_t == RCENTITY_ZONE); 1533 v = e->rcep_p.zone->zone_ipc.ipcq_shmmni + incr; 1534 if (v > rval->rcv_value) 1535 return (1); 1536 return (0); 1537 } 1538 1539 static rctl_ops_t zone_shmmni_ops = { 1540 rcop_no_action, 1541 zone_shmmni_usage, 1542 rcop_no_set, 1543 zone_shmmni_test 1544 }; 1545 1546 /*ARGSUSED*/ 1547 static rctl_qty_t 1548 zone_semmni_usage(rctl_t *rctl, struct proc *p) 1549 { 1550 ASSERT(MUTEX_HELD(&p->p_lock)); 1551 return (p->p_zone->zone_ipc.ipcq_semmni); 1552 } 1553 1554 /*ARGSUSED*/ 1555 static int 1556 zone_semmni_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rval, 1557 rctl_qty_t incr, uint_t flags) 1558 { 1559 rctl_qty_t v; 1560 ASSERT(MUTEX_HELD(&p->p_lock)); 1561 ASSERT(e->rcep_t == RCENTITY_ZONE); 1562 v = e->rcep_p.zone->zone_ipc.ipcq_semmni + incr; 1563 if (v > rval->rcv_value) 1564 return (1); 1565 return (0); 1566 } 1567 1568 static rctl_ops_t zone_semmni_ops = { 1569 rcop_no_action, 1570 zone_semmni_usage, 1571 rcop_no_set, 1572 zone_semmni_test 1573 }; 1574 1575 /*ARGSUSED*/ 1576 static rctl_qty_t 1577 zone_msgmni_usage(rctl_t *rctl, struct proc *p) 1578 { 1579 ASSERT(MUTEX_HELD(&p->p_lock)); 1580 return (p->p_zone->zone_ipc.ipcq_msgmni); 1581 } 1582 1583 /*ARGSUSED*/ 1584 static int 1585 zone_msgmni_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, rctl_val_t *rval, 1586 rctl_qty_t incr, uint_t flags) 1587 { 1588 rctl_qty_t v; 1589 ASSERT(MUTEX_HELD(&p->p_lock)); 1590 ASSERT(e->rcep_t == RCENTITY_ZONE); 1591 v = e->rcep_p.zone->zone_ipc.ipcq_msgmni + incr; 1592 if (v > rval->rcv_value) 1593 return (1); 1594 return (0); 1595 } 1596 1597 static rctl_ops_t zone_msgmni_ops = { 1598 rcop_no_action, 1599 zone_msgmni_usage, 1600 rcop_no_set, 1601 zone_msgmni_test 1602 }; 1603 1604 /*ARGSUSED*/ 1605 static rctl_qty_t 1606 zone_locked_mem_usage(rctl_t *rctl, struct proc *p) 1607 { 1608 rctl_qty_t q; 1609 ASSERT(MUTEX_HELD(&p->p_lock)); 1610 mutex_enter(&p->p_zone->zone_mem_lock); 1611 q = p->p_zone->zone_locked_mem; 1612 mutex_exit(&p->p_zone->zone_mem_lock); 1613 return (q); 1614 } 1615 1616 /*ARGSUSED*/ 1617 static int 1618 zone_locked_mem_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, 1619 rctl_val_t *rcntl, rctl_qty_t incr, uint_t flags) 1620 { 1621 rctl_qty_t q; 1622 zone_t *z; 1623 1624 z = e->rcep_p.zone; 1625 ASSERT(MUTEX_HELD(&p->p_lock)); 1626 ASSERT(MUTEX_HELD(&z->zone_mem_lock)); 1627 q = z->zone_locked_mem; 1628 if (q + incr > rcntl->rcv_value) 1629 return (1); 1630 return (0); 1631 } 1632 1633 /*ARGSUSED*/ 1634 static int 1635 zone_locked_mem_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e, 1636 rctl_qty_t nv) 1637 { 1638 ASSERT(MUTEX_HELD(&p->p_lock)); 1639 ASSERT(e->rcep_t == RCENTITY_ZONE); 1640 if (e->rcep_p.zone == NULL) 1641 return (0); 1642 e->rcep_p.zone->zone_locked_mem_ctl = nv; 1643 return (0); 1644 } 1645 1646 static rctl_ops_t zone_locked_mem_ops = { 1647 rcop_no_action, 1648 zone_locked_mem_usage, 1649 zone_locked_mem_set, 1650 zone_locked_mem_test 1651 }; 1652 1653 /*ARGSUSED*/ 1654 static rctl_qty_t 1655 zone_max_swap_usage(rctl_t *rctl, struct proc *p) 1656 { 1657 rctl_qty_t q; 1658 zone_t *z = p->p_zone; 1659 1660 ASSERT(MUTEX_HELD(&p->p_lock)); 1661 mutex_enter(&z->zone_mem_lock); 1662 q = z->zone_max_swap; 1663 mutex_exit(&z->zone_mem_lock); 1664 return (q); 1665 } 1666 1667 /*ARGSUSED*/ 1668 static int 1669 zone_max_swap_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, 1670 rctl_val_t *rcntl, rctl_qty_t incr, uint_t flags) 1671 { 1672 rctl_qty_t q; 1673 zone_t *z; 1674 1675 z = e->rcep_p.zone; 1676 ASSERT(MUTEX_HELD(&p->p_lock)); 1677 ASSERT(MUTEX_HELD(&z->zone_mem_lock)); 1678 q = z->zone_max_swap; 1679 if (q + incr > rcntl->rcv_value) 1680 return (1); 1681 return (0); 1682 } 1683 1684 /*ARGSUSED*/ 1685 static int 1686 zone_max_swap_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e, 1687 rctl_qty_t nv) 1688 { 1689 ASSERT(MUTEX_HELD(&p->p_lock)); 1690 ASSERT(e->rcep_t == RCENTITY_ZONE); 1691 if (e->rcep_p.zone == NULL) 1692 return (0); 1693 e->rcep_p.zone->zone_max_swap_ctl = nv; 1694 return (0); 1695 } 1696 1697 static rctl_ops_t zone_max_swap_ops = { 1698 rcop_no_action, 1699 zone_max_swap_usage, 1700 zone_max_swap_set, 1701 zone_max_swap_test 1702 }; 1703 1704 /*ARGSUSED*/ 1705 static rctl_qty_t 1706 zone_max_lofi_usage(rctl_t *rctl, struct proc *p) 1707 { 1708 rctl_qty_t q; 1709 zone_t *z = p->p_zone; 1710 1711 ASSERT(MUTEX_HELD(&p->p_lock)); 1712 mutex_enter(&z->zone_rctl_lock); 1713 q = z->zone_max_lofi; 1714 mutex_exit(&z->zone_rctl_lock); 1715 return (q); 1716 } 1717 1718 /*ARGSUSED*/ 1719 static int 1720 zone_max_lofi_test(rctl_t *r, proc_t *p, rctl_entity_p_t *e, 1721 rctl_val_t *rcntl, rctl_qty_t incr, uint_t flags) 1722 { 1723 rctl_qty_t q; 1724 zone_t *z; 1725 1726 z = e->rcep_p.zone; 1727 ASSERT(MUTEX_HELD(&p->p_lock)); 1728 ASSERT(MUTEX_HELD(&z->zone_rctl_lock)); 1729 q = z->zone_max_lofi; 1730 if (q + incr > rcntl->rcv_value) 1731 return (1); 1732 return (0); 1733 } 1734 1735 /*ARGSUSED*/ 1736 static int 1737 zone_max_lofi_set(rctl_t *rctl, struct proc *p, rctl_entity_p_t *e, 1738 rctl_qty_t nv) 1739 { 1740 ASSERT(MUTEX_HELD(&p->p_lock)); 1741 ASSERT(e->rcep_t == RCENTITY_ZONE); 1742 if (e->rcep_p.zone == NULL) 1743 return (0); 1744 e->rcep_p.zone->zone_max_lofi_ctl = nv; 1745 return (0); 1746 } 1747 1748 static rctl_ops_t zone_max_lofi_ops = { 1749 rcop_no_action, 1750 zone_max_lofi_usage, 1751 zone_max_lofi_set, 1752 zone_max_lofi_test 1753 }; 1754 1755 /* 1756 * Helper function to brand the zone with a unique ID. 1757 */ 1758 static void 1759 zone_uniqid(zone_t *zone) 1760 { 1761 static uint64_t uniqid = 0; 1762 1763 ASSERT(MUTEX_HELD(&zonehash_lock)); 1764 zone->zone_uniqid = uniqid++; 1765 } 1766 1767 /* 1768 * Returns a held pointer to the "kcred" for the specified zone. 1769 */ 1770 struct cred * 1771 zone_get_kcred(zoneid_t zoneid) 1772 { 1773 zone_t *zone; 1774 cred_t *cr; 1775 1776 if ((zone = zone_find_by_id(zoneid)) == NULL) 1777 return (NULL); 1778 cr = zone->zone_kcred; 1779 crhold(cr); 1780 zone_rele(zone); 1781 return (cr); 1782 } 1783 1784 static int 1785 zone_lockedmem_kstat_update(kstat_t *ksp, int rw) 1786 { 1787 zone_t *zone = ksp->ks_private; 1788 zone_kstat_t *zk = ksp->ks_data; 1789 1790 if (rw == KSTAT_WRITE) 1791 return (EACCES); 1792 1793 zk->zk_usage.value.ui64 = zone->zone_locked_mem; 1794 zk->zk_value.value.ui64 = zone->zone_locked_mem_ctl; 1795 return (0); 1796 } 1797 1798 static int 1799 zone_nprocs_kstat_update(kstat_t *ksp, int rw) 1800 { 1801 zone_t *zone = ksp->ks_private; 1802 zone_kstat_t *zk = ksp->ks_data; 1803 1804 if (rw == KSTAT_WRITE) 1805 return (EACCES); 1806 1807 zk->zk_usage.value.ui64 = zone->zone_nprocs; 1808 zk->zk_value.value.ui64 = zone->zone_nprocs_ctl; 1809 return (0); 1810 } 1811 1812 static int 1813 zone_swapresv_kstat_update(kstat_t *ksp, int rw) 1814 { 1815 zone_t *zone = ksp->ks_private; 1816 zone_kstat_t *zk = ksp->ks_data; 1817 1818 if (rw == KSTAT_WRITE) 1819 return (EACCES); 1820 1821 zk->zk_usage.value.ui64 = zone->zone_max_swap; 1822 zk->zk_value.value.ui64 = zone->zone_max_swap_ctl; 1823 return (0); 1824 } 1825 1826 static kstat_t * 1827 zone_kstat_create_common(zone_t *zone, char *name, 1828 int (*updatefunc) (kstat_t *, int)) 1829 { 1830 kstat_t *ksp; 1831 zone_kstat_t *zk; 1832 1833 ksp = rctl_kstat_create_zone(zone, name, KSTAT_TYPE_NAMED, 1834 sizeof (zone_kstat_t) / sizeof (kstat_named_t), 1835 KSTAT_FLAG_VIRTUAL); 1836 1837 if (ksp == NULL) 1838 return (NULL); 1839 1840 zk = ksp->ks_data = kmem_alloc(sizeof (zone_kstat_t), KM_SLEEP); 1841 ksp->ks_data_size += strlen(zone->zone_name) + 1; 1842 kstat_named_init(&zk->zk_zonename, "zonename", KSTAT_DATA_STRING); 1843 kstat_named_setstr(&zk->zk_zonename, zone->zone_name); 1844 kstat_named_init(&zk->zk_usage, "usage", KSTAT_DATA_UINT64); 1845 kstat_named_init(&zk->zk_value, "value", KSTAT_DATA_UINT64); 1846 ksp->ks_update = updatefunc; 1847 ksp->ks_private = zone; 1848 kstat_install(ksp); 1849 return (ksp); 1850 } 1851 1852 1853 static int 1854 zone_mcap_kstat_update(kstat_t *ksp, int rw) 1855 { 1856 zone_t *zone = ksp->ks_private; 1857 zone_mcap_kstat_t *zmp = ksp->ks_data; 1858 1859 if (rw == KSTAT_WRITE) 1860 return (EACCES); 1861 1862 zmp->zm_pgpgin.value.ui64 = zone->zone_pgpgin; 1863 zmp->zm_anonpgin.value.ui64 = zone->zone_anonpgin; 1864 zmp->zm_execpgin.value.ui64 = zone->zone_execpgin; 1865 zmp->zm_fspgin.value.ui64 = zone->zone_fspgin; 1866 zmp->zm_anon_alloc_fail.value.ui64 = zone->zone_anon_alloc_fail; 1867 1868 return (0); 1869 } 1870 1871 static kstat_t * 1872 zone_mcap_kstat_create(zone_t *zone) 1873 { 1874 kstat_t *ksp; 1875 zone_mcap_kstat_t *zmp; 1876 1877 if ((ksp = kstat_create_zone("memory_cap", zone->zone_id, 1878 zone->zone_name, "zone_memory_cap", KSTAT_TYPE_NAMED, 1879 sizeof (zone_mcap_kstat_t) / sizeof (kstat_named_t), 1880 KSTAT_FLAG_VIRTUAL, zone->zone_id)) == NULL) 1881 return (NULL); 1882 1883 if (zone->zone_id != GLOBAL_ZONEID) 1884 kstat_zone_add(ksp, GLOBAL_ZONEID); 1885 1886 zmp = ksp->ks_data = kmem_zalloc(sizeof (zone_mcap_kstat_t), KM_SLEEP); 1887 ksp->ks_data_size += strlen(zone->zone_name) + 1; 1888 ksp->ks_lock = &zone->zone_mcap_lock; 1889 zone->zone_mcap_stats = zmp; 1890 1891 /* The kstat "name" field is not large enough for a full zonename */ 1892 kstat_named_init(&zmp->zm_zonename, "zonename", KSTAT_DATA_STRING); 1893 kstat_named_setstr(&zmp->zm_zonename, zone->zone_name); 1894 kstat_named_init(&zmp->zm_pgpgin, "pgpgin", KSTAT_DATA_UINT64); 1895 kstat_named_init(&zmp->zm_anonpgin, "anonpgin", KSTAT_DATA_UINT64); 1896 kstat_named_init(&zmp->zm_execpgin, "execpgin", KSTAT_DATA_UINT64); 1897 kstat_named_init(&zmp->zm_fspgin, "fspgin", KSTAT_DATA_UINT64); 1898 kstat_named_init(&zmp->zm_anon_alloc_fail, "anon_alloc_fail", 1899 KSTAT_DATA_UINT64); 1900 1901 ksp->ks_update = zone_mcap_kstat_update; 1902 ksp->ks_private = zone; 1903 1904 kstat_install(ksp); 1905 return (ksp); 1906 } 1907 1908 static int 1909 zone_misc_kstat_update(kstat_t *ksp, int rw) 1910 { 1911 zone_t *zone = ksp->ks_private; 1912 zone_misc_kstat_t *zmp = ksp->ks_data; 1913 hrtime_t tmp; 1914 1915 if (rw == KSTAT_WRITE) 1916 return (EACCES); 1917 1918 tmp = zone->zone_utime; 1919 scalehrtime(&tmp); 1920 zmp->zm_utime.value.ui64 = tmp; 1921 tmp = zone->zone_stime; 1922 scalehrtime(&tmp); 1923 zmp->zm_stime.value.ui64 = tmp; 1924 tmp = zone->zone_wtime; 1925 scalehrtime(&tmp); 1926 zmp->zm_wtime.value.ui64 = tmp; 1927 1928 zmp->zm_avenrun1.value.ui32 = zone->zone_avenrun[0]; 1929 zmp->zm_avenrun5.value.ui32 = zone->zone_avenrun[1]; 1930 zmp->zm_avenrun15.value.ui32 = zone->zone_avenrun[2]; 1931 1932 zmp->zm_ffcap.value.ui32 = zone->zone_ffcap; 1933 zmp->zm_ffnoproc.value.ui32 = zone->zone_ffnoproc; 1934 zmp->zm_ffnomem.value.ui32 = zone->zone_ffnomem; 1935 zmp->zm_ffmisc.value.ui32 = zone->zone_ffmisc; 1936 1937 zmp->zm_nested_intp.value.ui32 = zone->zone_nested_intp; 1938 1939 zmp->zm_init_pid.value.ui32 = zone->zone_proc_initpid; 1940 zmp->zm_boot_time.value.ui64 = (uint64_t)zone->zone_boot_time; 1941 1942 return (0); 1943 } 1944 1945 static kstat_t * 1946 zone_misc_kstat_create(zone_t *zone) 1947 { 1948 kstat_t *ksp; 1949 zone_misc_kstat_t *zmp; 1950 1951 if ((ksp = kstat_create_zone("zones", zone->zone_id, 1952 zone->zone_name, "zone_misc", KSTAT_TYPE_NAMED, 1953 sizeof (zone_misc_kstat_t) / sizeof (kstat_named_t), 1954 KSTAT_FLAG_VIRTUAL, zone->zone_id)) == NULL) 1955 return (NULL); 1956 1957 if (zone->zone_id != GLOBAL_ZONEID) 1958 kstat_zone_add(ksp, GLOBAL_ZONEID); 1959 1960 zmp = ksp->ks_data = kmem_zalloc(sizeof (zone_misc_kstat_t), KM_SLEEP); 1961 ksp->ks_data_size += strlen(zone->zone_name) + 1; 1962 ksp->ks_lock = &zone->zone_misc_lock; 1963 zone->zone_misc_stats = zmp; 1964 1965 /* The kstat "name" field is not large enough for a full zonename */ 1966 kstat_named_init(&zmp->zm_zonename, "zonename", KSTAT_DATA_STRING); 1967 kstat_named_setstr(&zmp->zm_zonename, zone->zone_name); 1968 kstat_named_init(&zmp->zm_utime, "nsec_user", KSTAT_DATA_UINT64); 1969 kstat_named_init(&zmp->zm_stime, "nsec_sys", KSTAT_DATA_UINT64); 1970 kstat_named_init(&zmp->zm_wtime, "nsec_waitrq", KSTAT_DATA_UINT64); 1971 kstat_named_init(&zmp->zm_avenrun1, "avenrun_1min", KSTAT_DATA_UINT32); 1972 kstat_named_init(&zmp->zm_avenrun5, "avenrun_5min", KSTAT_DATA_UINT32); 1973 kstat_named_init(&zmp->zm_avenrun15, "avenrun_15min", 1974 KSTAT_DATA_UINT32); 1975 kstat_named_init(&zmp->zm_ffcap, "forkfail_cap", KSTAT_DATA_UINT32); 1976 kstat_named_init(&zmp->zm_ffnoproc, "forkfail_noproc", 1977 KSTAT_DATA_UINT32); 1978 kstat_named_init(&zmp->zm_ffnomem, "forkfail_nomem", KSTAT_DATA_UINT32); 1979 kstat_named_init(&zmp->zm_ffmisc, "forkfail_misc", KSTAT_DATA_UINT32); 1980 kstat_named_init(&zmp->zm_nested_intp, "nested_interp", 1981 KSTAT_DATA_UINT32); 1982 kstat_named_init(&zmp->zm_init_pid, "init_pid", KSTAT_DATA_UINT32); 1983 kstat_named_init(&zmp->zm_boot_time, "boot_time", KSTAT_DATA_UINT64); 1984 1985 ksp->ks_update = zone_misc_kstat_update; 1986 ksp->ks_private = zone; 1987 1988 kstat_install(ksp); 1989 return (ksp); 1990 } 1991 1992 static void 1993 zone_kstat_create(zone_t *zone) 1994 { 1995 zone->zone_lockedmem_kstat = zone_kstat_create_common(zone, 1996 "lockedmem", zone_lockedmem_kstat_update); 1997 zone->zone_swapresv_kstat = zone_kstat_create_common(zone, 1998 "swapresv", zone_swapresv_kstat_update); 1999 zone->zone_nprocs_kstat = zone_kstat_create_common(zone, 2000 "nprocs", zone_nprocs_kstat_update); 2001 2002 if ((zone->zone_mcap_ksp = zone_mcap_kstat_create(zone)) == NULL) { 2003 zone->zone_mcap_stats = kmem_zalloc( 2004 sizeof (zone_mcap_kstat_t), KM_SLEEP); 2005 } 2006 2007 if ((zone->zone_misc_ksp = zone_misc_kstat_create(zone)) == NULL) { 2008 zone->zone_misc_stats = kmem_zalloc( 2009 sizeof (zone_misc_kstat_t), KM_SLEEP); 2010 } 2011 } 2012 2013 static void 2014 zone_kstat_delete_common(kstat_t **pkstat, size_t datasz) 2015 { 2016 void *data; 2017 2018 if (*pkstat != NULL) { 2019 data = (*pkstat)->ks_data; 2020 kstat_delete(*pkstat); 2021 kmem_free(data, datasz); 2022 *pkstat = NULL; 2023 } 2024 } 2025 2026 static void 2027 zone_kstat_delete(zone_t *zone) 2028 { 2029 zone_kstat_delete_common(&zone->zone_lockedmem_kstat, 2030 sizeof (zone_kstat_t)); 2031 zone_kstat_delete_common(&zone->zone_swapresv_kstat, 2032 sizeof (zone_kstat_t)); 2033 zone_kstat_delete_common(&zone->zone_nprocs_kstat, 2034 sizeof (zone_kstat_t)); 2035 zone_kstat_delete_common(&zone->zone_mcap_ksp, 2036 sizeof (zone_mcap_kstat_t)); 2037 zone_kstat_delete_common(&zone->zone_misc_ksp, 2038 sizeof (zone_misc_kstat_t)); 2039 } 2040 2041 /* 2042 * Called very early on in boot to initialize the ZSD list so that 2043 * zone_key_create() can be called before zone_init(). It also initializes 2044 * portions of zone0 which may be used before zone_init() is called. The 2045 * variable "global_zone" will be set when zone0 is fully initialized by 2046 * zone_init(). 2047 */ 2048 void 2049 zone_zsd_init(void) 2050 { 2051 mutex_init(&zonehash_lock, NULL, MUTEX_DEFAULT, NULL); 2052 mutex_init(&zsd_key_lock, NULL, MUTEX_DEFAULT, NULL); 2053 list_create(&zsd_registered_keys, sizeof (struct zsd_entry), 2054 offsetof(struct zsd_entry, zsd_linkage)); 2055 list_create(&zone_active, sizeof (zone_t), 2056 offsetof(zone_t, zone_linkage)); 2057 list_create(&zone_deathrow, sizeof (zone_t), 2058 offsetof(zone_t, zone_linkage)); 2059 2060 mutex_init(&zone0.zone_lock, NULL, MUTEX_DEFAULT, NULL); 2061 mutex_init(&zone0.zone_nlwps_lock, NULL, MUTEX_DEFAULT, NULL); 2062 mutex_init(&zone0.zone_mem_lock, NULL, MUTEX_DEFAULT, NULL); 2063 zone0.zone_shares = 1; 2064 zone0.zone_nlwps = 0; 2065 zone0.zone_nlwps_ctl = INT_MAX; 2066 zone0.zone_nprocs = 0; 2067 zone0.zone_nprocs_ctl = INT_MAX; 2068 zone0.zone_locked_mem = 0; 2069 zone0.zone_locked_mem_ctl = UINT64_MAX; 2070 ASSERT(zone0.zone_max_swap == 0); 2071 zone0.zone_max_swap_ctl = UINT64_MAX; 2072 zone0.zone_max_lofi = 0; 2073 zone0.zone_max_lofi_ctl = UINT64_MAX; 2074 zone0.zone_shmmax = 0; 2075 zone0.zone_ipc.ipcq_shmmni = 0; 2076 zone0.zone_ipc.ipcq_semmni = 0; 2077 zone0.zone_ipc.ipcq_msgmni = 0; 2078 zone0.zone_name = GLOBAL_ZONENAME; 2079 zone0.zone_nodename = utsname.nodename; 2080 zone0.zone_domain = srpc_domain; 2081 zone0.zone_hostid = HW_INVALID_HOSTID; 2082 zone0.zone_fs_allowed = NULL; 2083 zone0.zone_ref = 1; 2084 zone0.zone_id = GLOBAL_ZONEID; 2085 zone0.zone_status = ZONE_IS_RUNNING; 2086 zone0.zone_rootpath = "/"; 2087 zone0.zone_rootpathlen = 2; 2088 zone0.zone_psetid = ZONE_PS_INVAL; 2089 zone0.zone_ncpus = 0; 2090 zone0.zone_ncpus_online = 0; 2091 zone0.zone_proc_initpid = 1; 2092 zone0.zone_initname = initname; 2093 zone0.zone_lockedmem_kstat = NULL; 2094 zone0.zone_swapresv_kstat = NULL; 2095 zone0.zone_nprocs_kstat = NULL; 2096 2097 zone0.zone_stime = 0; 2098 zone0.zone_utime = 0; 2099 zone0.zone_wtime = 0; 2100 2101 list_create(&zone0.zone_ref_list, sizeof (zone_ref_t), 2102 offsetof(zone_ref_t, zref_linkage)); 2103 list_create(&zone0.zone_zsd, sizeof (struct zsd_entry), 2104 offsetof(struct zsd_entry, zsd_linkage)); 2105 list_insert_head(&zone_active, &zone0); 2106 2107 /* 2108 * The root filesystem is not mounted yet, so zone_rootvp cannot be set 2109 * to anything meaningful. It is assigned to be 'rootdir' in 2110 * vfs_mountroot(). 2111 */ 2112 zone0.zone_rootvp = NULL; 2113 zone0.zone_vfslist = NULL; 2114 zone0.zone_bootargs = initargs; 2115 zone0.zone_privset = kmem_alloc(sizeof (priv_set_t), KM_SLEEP); 2116 /* 2117 * The global zone has all privileges 2118 */ 2119 priv_fillset(zone0.zone_privset); 2120 /* 2121 * Add p0 to the global zone 2122 */ 2123 zone0.zone_zsched = &p0; 2124 p0.p_zone = &zone0; 2125 } 2126 2127 /* 2128 * Compute a hash value based on the contents of the label and the DOI. The 2129 * hash algorithm is somewhat arbitrary, but is based on the observation that 2130 * humans will likely pick labels that differ by amounts that work out to be 2131 * multiples of the number of hash chains, and thus stirring in some primes 2132 * should help. 2133 */ 2134 static uint_t 2135 hash_bylabel(void *hdata, mod_hash_key_t key) 2136 { 2137 const ts_label_t *lab = (ts_label_t *)key; 2138 const uint32_t *up, *ue; 2139 uint_t hash; 2140 int i; 2141 2142 _NOTE(ARGUNUSED(hdata)); 2143 2144 hash = lab->tsl_doi + (lab->tsl_doi << 1); 2145 /* we depend on alignment of label, but not representation */ 2146 up = (const uint32_t *)&lab->tsl_label; 2147 ue = up + sizeof (lab->tsl_label) / sizeof (*up); 2148 i = 1; 2149 while (up < ue) { 2150 /* using 2^n + 1, 1 <= n <= 16 as source of many primes */ 2151 hash += *up + (*up << ((i % 16) + 1)); 2152 up++; 2153 i++; 2154 } 2155 return (hash); 2156 } 2157 2158 /* 2159 * All that mod_hash cares about here is zero (equal) versus non-zero (not 2160 * equal). This may need to be changed if less than / greater than is ever 2161 * needed. 2162 */ 2163 static int 2164 hash_labelkey_cmp(mod_hash_key_t key1, mod_hash_key_t key2) 2165 { 2166 ts_label_t *lab1 = (ts_label_t *)key1; 2167 ts_label_t *lab2 = (ts_label_t *)key2; 2168 2169 return (label_equal(lab1, lab2) ? 0 : 1); 2170 } 2171 2172 /* 2173 * Called by main() to initialize the zones framework. 2174 */ 2175 void 2176 zone_init(void) 2177 { 2178 rctl_dict_entry_t *rde; 2179 rctl_val_t *dval; 2180 rctl_set_t *set; 2181 rctl_alloc_gp_t *gp; 2182 rctl_entity_p_t e; 2183 int res; 2184 2185 ASSERT(curproc == &p0); 2186 2187 /* 2188 * Create ID space for zone IDs. ID 0 is reserved for the 2189 * global zone. 2190 */ 2191 zoneid_space = id_space_create("zoneid_space", 1, MAX_ZONEID); 2192 2193 /* 2194 * Initialize generic zone resource controls, if any. 2195 */ 2196 rc_zone_cpu_shares = rctl_register("zone.cpu-shares", 2197 RCENTITY_ZONE, RCTL_GLOBAL_SIGNAL_NEVER | RCTL_GLOBAL_DENY_NEVER | 2198 RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT | RCTL_GLOBAL_SYSLOG_NEVER, 2199 FSS_MAXSHARES, FSS_MAXSHARES, &zone_cpu_shares_ops); 2200 2201 rc_zone_cpu_cap = rctl_register("zone.cpu-cap", 2202 RCENTITY_ZONE, RCTL_GLOBAL_SIGNAL_NEVER | RCTL_GLOBAL_DENY_ALWAYS | 2203 RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT |RCTL_GLOBAL_SYSLOG_NEVER | 2204 RCTL_GLOBAL_INFINITE, 2205 MAXCAP, MAXCAP, &zone_cpu_cap_ops); 2206 2207 rc_zone_nlwps = rctl_register("zone.max-lwps", RCENTITY_ZONE, 2208 RCTL_GLOBAL_NOACTION | RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT, 2209 INT_MAX, INT_MAX, &zone_lwps_ops); 2210 2211 rc_zone_nprocs = rctl_register("zone.max-processes", RCENTITY_ZONE, 2212 RCTL_GLOBAL_NOACTION | RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT, 2213 INT_MAX, INT_MAX, &zone_procs_ops); 2214 2215 /* 2216 * System V IPC resource controls 2217 */ 2218 rc_zone_msgmni = rctl_register("zone.max-msg-ids", 2219 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC | 2220 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_msgmni_ops); 2221 2222 rc_zone_semmni = rctl_register("zone.max-sem-ids", 2223 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC | 2224 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_semmni_ops); 2225 2226 rc_zone_shmmni = rctl_register("zone.max-shm-ids", 2227 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC | 2228 RCTL_GLOBAL_COUNT, IPC_IDS_MAX, IPC_IDS_MAX, &zone_shmmni_ops); 2229 2230 rc_zone_shmmax = rctl_register("zone.max-shm-memory", 2231 RCENTITY_ZONE, RCTL_GLOBAL_DENY_ALWAYS | RCTL_GLOBAL_NOBASIC | 2232 RCTL_GLOBAL_BYTES, UINT64_MAX, UINT64_MAX, &zone_shmmax_ops); 2233 2234 /* 2235 * Create a rctl_val with PRIVILEGED, NOACTION, value = 1. Then attach 2236 * this at the head of the rctl_dict_entry for ``zone.cpu-shares''. 2237 */ 2238 dval = kmem_cache_alloc(rctl_val_cache, KM_SLEEP); 2239 bzero(dval, sizeof (rctl_val_t)); 2240 dval->rcv_value = 1; 2241 dval->rcv_privilege = RCPRIV_PRIVILEGED; 2242 dval->rcv_flagaction = RCTL_LOCAL_NOACTION; 2243 dval->rcv_action_recip_pid = -1; 2244 2245 rde = rctl_dict_lookup("zone.cpu-shares"); 2246 (void) rctl_val_list_insert(&rde->rcd_default_value, dval); 2247 2248 rc_zone_locked_mem = rctl_register("zone.max-locked-memory", 2249 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_BYTES | 2250 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX, 2251 &zone_locked_mem_ops); 2252 2253 rc_zone_max_swap = rctl_register("zone.max-swap", 2254 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_BYTES | 2255 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX, 2256 &zone_max_swap_ops); 2257 2258 rc_zone_max_lofi = rctl_register("zone.max-lofi", 2259 RCENTITY_ZONE, RCTL_GLOBAL_NOBASIC | RCTL_GLOBAL_COUNT | 2260 RCTL_GLOBAL_DENY_ALWAYS, UINT64_MAX, UINT64_MAX, 2261 &zone_max_lofi_ops); 2262 2263 /* 2264 * Initialize the ``global zone''. 2265 */ 2266 set = rctl_set_create(); 2267 gp = rctl_set_init_prealloc(RCENTITY_ZONE); 2268 mutex_enter(&p0.p_lock); 2269 e.rcep_p.zone = &zone0; 2270 e.rcep_t = RCENTITY_ZONE; 2271 zone0.zone_rctls = rctl_set_init(RCENTITY_ZONE, &p0, &e, set, 2272 gp); 2273 2274 zone0.zone_nlwps = p0.p_lwpcnt; 2275 zone0.zone_nprocs = 1; 2276 zone0.zone_ntasks = 1; 2277 mutex_exit(&p0.p_lock); 2278 zone0.zone_restart_init = B_TRUE; 2279 zone0.zone_brand = &native_brand; 2280 rctl_prealloc_destroy(gp); 2281 /* 2282 * pool_default hasn't been initialized yet, so we let pool_init() 2283 * take care of making sure the global zone is in the default pool. 2284 */ 2285 2286 /* 2287 * Initialize global zone kstats 2288 */ 2289 zone_kstat_create(&zone0); 2290 2291 /* 2292 * Initialize zone label. 2293 * mlp are initialized when tnzonecfg is loaded. 2294 */ 2295 zone0.zone_slabel = l_admin_low; 2296 rw_init(&zone0.zone_mlps.mlpl_rwlock, NULL, RW_DEFAULT, NULL); 2297 label_hold(l_admin_low); 2298 2299 /* 2300 * Initialise the lock for the database structure used by mntfs. 2301 */ 2302 rw_init(&zone0.zone_mntfs_db_lock, NULL, RW_DEFAULT, NULL); 2303 2304 mutex_enter(&zonehash_lock); 2305 zone_uniqid(&zone0); 2306 ASSERT(zone0.zone_uniqid == GLOBAL_ZONEUNIQID); 2307 2308 zonehashbyid = mod_hash_create_idhash("zone_by_id", zone_hash_size, 2309 mod_hash_null_valdtor); 2310 zonehashbyname = mod_hash_create_strhash("zone_by_name", 2311 zone_hash_size, mod_hash_null_valdtor); 2312 /* 2313 * maintain zonehashbylabel only for labeled systems 2314 */ 2315 if (is_system_labeled()) 2316 zonehashbylabel = mod_hash_create_extended("zone_by_label", 2317 zone_hash_size, mod_hash_null_keydtor, 2318 mod_hash_null_valdtor, hash_bylabel, NULL, 2319 hash_labelkey_cmp, KM_SLEEP); 2320 zonecount = 1; 2321 2322 (void) mod_hash_insert(zonehashbyid, (mod_hash_key_t)GLOBAL_ZONEID, 2323 (mod_hash_val_t)&zone0); 2324 (void) mod_hash_insert(zonehashbyname, (mod_hash_key_t)zone0.zone_name, 2325 (mod_hash_val_t)&zone0); 2326 if (is_system_labeled()) { 2327 zone0.zone_flags |= ZF_HASHED_LABEL; 2328 (void) mod_hash_insert(zonehashbylabel, 2329 (mod_hash_key_t)zone0.zone_slabel, (mod_hash_val_t)&zone0); 2330 } 2331 mutex_exit(&zonehash_lock); 2332 2333 /* 2334 * We avoid setting zone_kcred until now, since kcred is initialized 2335 * sometime after zone_zsd_init() and before zone_init(). 2336 */ 2337 zone0.zone_kcred = kcred; 2338 /* 2339 * The global zone is fully initialized (except for zone_rootvp which 2340 * will be set when the root filesystem is mounted). 2341 */ 2342 global_zone = &zone0; 2343 2344 /* 2345 * Setup an event channel to send zone status change notifications on 2346 */ 2347 res = sysevent_evc_bind(ZONE_EVENT_CHANNEL, &zone_event_chan, 2348 EVCH_CREAT); 2349 2350 if (res) 2351 panic("Sysevent_evc_bind failed during zone setup.\n"); 2352 2353 } 2354 2355 static void 2356 zone_free(zone_t *zone) 2357 { 2358 ASSERT(zone != global_zone); 2359 ASSERT(zone->zone_ntasks == 0); 2360 ASSERT(zone->zone_nlwps == 0); 2361 ASSERT(zone->zone_nprocs == 0); 2362 ASSERT(zone->zone_cred_ref == 0); 2363 ASSERT(zone->zone_kcred == NULL); 2364 ASSERT(zone_status_get(zone) == ZONE_IS_DEAD || 2365 zone_status_get(zone) == ZONE_IS_UNINITIALIZED); 2366 ASSERT(list_is_empty(&zone->zone_ref_list)); 2367 2368 /* 2369 * Remove any zone caps. 2370 */ 2371 cpucaps_zone_remove(zone); 2372 2373 ASSERT(zone->zone_cpucap == NULL); 2374 2375 /* remove from deathrow list */ 2376 if (zone_status_get(zone) == ZONE_IS_DEAD) { 2377 ASSERT(zone->zone_ref == 0); 2378 mutex_enter(&zone_deathrow_lock); 2379 list_remove(&zone_deathrow, zone); 2380 mutex_exit(&zone_deathrow_lock); 2381 } 2382 2383 list_destroy(&zone->zone_ref_list); 2384 zone_free_zsd(zone); 2385 zone_free_datasets(zone); 2386 list_destroy(&zone->zone_dl_list); 2387 2388 if (zone->zone_rootvp != NULL) 2389 VN_RELE(zone->zone_rootvp); 2390 if (zone->zone_rootpath) 2391 kmem_free(zone->zone_rootpath, zone->zone_rootpathlen); 2392 if (zone->zone_name != NULL) 2393 kmem_free(zone->zone_name, ZONENAME_MAX); 2394 if (zone->zone_slabel != NULL) 2395 label_rele(zone->zone_slabel); 2396 if (zone->zone_nodename != NULL) 2397 kmem_free(zone->zone_nodename, _SYS_NMLN); 2398 if (zone->zone_domain != NULL) 2399 kmem_free(zone->zone_domain, _SYS_NMLN); 2400 if (zone->zone_privset != NULL) 2401 kmem_free(zone->zone_privset, sizeof (priv_set_t)); 2402 if (zone->zone_rctls != NULL) 2403 rctl_set_free(zone->zone_rctls); 2404 if (zone->zone_bootargs != NULL) 2405 strfree(zone->zone_bootargs); 2406 if (zone->zone_initname != NULL) 2407 strfree(zone->zone_initname); 2408 if (zone->zone_fs_allowed != NULL) 2409 strfree(zone->zone_fs_allowed); 2410 if (zone->zone_pfexecd != NULL) 2411 klpd_freelist(&zone->zone_pfexecd); 2412 id_free(zoneid_space, zone->zone_id); 2413 mutex_destroy(&zone->zone_lock); 2414 cv_destroy(&zone->zone_cv); 2415 rw_destroy(&zone->zone_mlps.mlpl_rwlock); 2416 rw_destroy(&zone->zone_mntfs_db_lock); 2417 kmem_free(zone, sizeof (zone_t)); 2418 } 2419 2420 /* 2421 * See block comment at the top of this file for information about zone 2422 * status values. 2423 */ 2424 /* 2425 * Convenience function for setting zone status. 2426 */ 2427 static void 2428 zone_status_set(zone_t *zone, zone_status_t status) 2429 { 2430 2431 nvlist_t *nvl = NULL; 2432 ASSERT(MUTEX_HELD(&zone_status_lock)); 2433 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE && 2434 status >= zone_status_get(zone)); 2435 2436 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) || 2437 nvlist_add_string(nvl, ZONE_CB_NAME, zone->zone_name) || 2438 nvlist_add_string(nvl, ZONE_CB_NEWSTATE, 2439 zone_status_table[status]) || 2440 nvlist_add_string(nvl, ZONE_CB_OLDSTATE, 2441 zone_status_table[zone->zone_status]) || 2442 nvlist_add_int32(nvl, ZONE_CB_ZONEID, zone->zone_id) || 2443 nvlist_add_uint64(nvl, ZONE_CB_TIMESTAMP, (uint64_t)gethrtime()) || 2444 sysevent_evc_publish(zone_event_chan, ZONE_EVENT_STATUS_CLASS, 2445 ZONE_EVENT_STATUS_SUBCLASS, "sun.com", "kernel", nvl, EVCH_SLEEP)) { 2446 #ifdef DEBUG 2447 (void) printf( 2448 "Failed to allocate and send zone state change event.\n"); 2449 #endif 2450 } 2451 nvlist_free(nvl); 2452 2453 zone->zone_status = status; 2454 2455 cv_broadcast(&zone->zone_cv); 2456 } 2457 2458 /* 2459 * Public function to retrieve the zone status. The zone status may 2460 * change after it is retrieved. 2461 */ 2462 zone_status_t 2463 zone_status_get(zone_t *zone) 2464 { 2465 return (zone->zone_status); 2466 } 2467 2468 static int 2469 zone_set_bootargs(zone_t *zone, const char *zone_bootargs) 2470 { 2471 char *buf = kmem_zalloc(BOOTARGS_MAX, KM_SLEEP); 2472 int err = 0; 2473 2474 ASSERT(zone != global_zone); 2475 if ((err = copyinstr(zone_bootargs, buf, BOOTARGS_MAX, NULL)) != 0) 2476 goto done; /* EFAULT or ENAMETOOLONG */ 2477 2478 if (zone->zone_bootargs != NULL) 2479 strfree(zone->zone_bootargs); 2480 2481 zone->zone_bootargs = strdup(buf); 2482 2483 done: 2484 kmem_free(buf, BOOTARGS_MAX); 2485 return (err); 2486 } 2487 2488 static int 2489 zone_set_brand(zone_t *zone, const char *brand) 2490 { 2491 struct brand_attr *attrp; 2492 brand_t *bp; 2493 2494 attrp = kmem_alloc(sizeof (struct brand_attr), KM_SLEEP); 2495 if (copyin(brand, attrp, sizeof (struct brand_attr)) != 0) { 2496 kmem_free(attrp, sizeof (struct brand_attr)); 2497 return (EFAULT); 2498 } 2499 2500 bp = brand_register_zone(attrp); 2501 kmem_free(attrp, sizeof (struct brand_attr)); 2502 if (bp == NULL) 2503 return (EINVAL); 2504 2505 /* 2506 * This is the only place where a zone can change it's brand. 2507 * We already need to hold zone_status_lock to check the zone 2508 * status, so we'll just use that lock to serialize zone 2509 * branding requests as well. 2510 */ 2511 mutex_enter(&zone_status_lock); 2512 2513 /* Re-Branding is not allowed and the zone can't be booted yet */ 2514 if ((ZONE_IS_BRANDED(zone)) || 2515 (zone_status_get(zone) >= ZONE_IS_BOOTING)) { 2516 mutex_exit(&zone_status_lock); 2517 brand_unregister_zone(bp); 2518 return (EINVAL); 2519 } 2520 2521 /* set up the brand specific data */ 2522 zone->zone_brand = bp; 2523 ZBROP(zone)->b_init_brand_data(zone); 2524 2525 mutex_exit(&zone_status_lock); 2526 return (0); 2527 } 2528 2529 static int 2530 zone_set_fs_allowed(zone_t *zone, const char *zone_fs_allowed) 2531 { 2532 char *buf = kmem_zalloc(ZONE_FS_ALLOWED_MAX, KM_SLEEP); 2533 int err = 0; 2534 2535 ASSERT(zone != global_zone); 2536 if ((err = copyinstr(zone_fs_allowed, buf, 2537 ZONE_FS_ALLOWED_MAX, NULL)) != 0) 2538 goto done; 2539 2540 if (zone->zone_fs_allowed != NULL) 2541 strfree(zone->zone_fs_allowed); 2542 2543 zone->zone_fs_allowed = strdup(buf); 2544 2545 done: 2546 kmem_free(buf, ZONE_FS_ALLOWED_MAX); 2547 return (err); 2548 } 2549 2550 static int 2551 zone_set_initname(zone_t *zone, const char *zone_initname) 2552 { 2553 char initname[INITNAME_SZ]; 2554 size_t len; 2555 int err = 0; 2556 2557 ASSERT(zone != global_zone); 2558 if ((err = copyinstr(zone_initname, initname, INITNAME_SZ, &len)) != 0) 2559 return (err); /* EFAULT or ENAMETOOLONG */ 2560 2561 if (zone->zone_initname != NULL) 2562 strfree(zone->zone_initname); 2563 2564 zone->zone_initname = kmem_alloc(strlen(initname) + 1, KM_SLEEP); 2565 (void) strcpy(zone->zone_initname, initname); 2566 return (0); 2567 } 2568 2569 static int 2570 zone_set_phys_mcap(zone_t *zone, const uint64_t *zone_mcap) 2571 { 2572 uint64_t mcap; 2573 int err = 0; 2574 2575 if ((err = copyin(zone_mcap, &mcap, sizeof (uint64_t))) == 0) 2576 zone->zone_phys_mcap = mcap; 2577 2578 return (err); 2579 } 2580 2581 static int 2582 zone_set_sched_class(zone_t *zone, const char *new_class) 2583 { 2584 char sched_class[PC_CLNMSZ]; 2585 id_t classid; 2586 int err; 2587 2588 ASSERT(zone != global_zone); 2589 if ((err = copyinstr(new_class, sched_class, PC_CLNMSZ, NULL)) != 0) 2590 return (err); /* EFAULT or ENAMETOOLONG */ 2591 2592 if (getcid(sched_class, &classid) != 0 || CLASS_KERNEL(classid)) 2593 return (set_errno(EINVAL)); 2594 zone->zone_defaultcid = classid; 2595 ASSERT(zone->zone_defaultcid > 0 && 2596 zone->zone_defaultcid < loaded_classes); 2597 2598 return (0); 2599 } 2600 2601 /* 2602 * Block indefinitely waiting for (zone_status >= status) 2603 */ 2604 void 2605 zone_status_wait(zone_t *zone, zone_status_t status) 2606 { 2607 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE); 2608 2609 mutex_enter(&zone_status_lock); 2610 while (zone->zone_status < status) { 2611 cv_wait(&zone->zone_cv, &zone_status_lock); 2612 } 2613 mutex_exit(&zone_status_lock); 2614 } 2615 2616 /* 2617 * Private CPR-safe version of zone_status_wait(). 2618 */ 2619 static void 2620 zone_status_wait_cpr(zone_t *zone, zone_status_t status, char *str) 2621 { 2622 callb_cpr_t cprinfo; 2623 2624 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE); 2625 2626 CALLB_CPR_INIT(&cprinfo, &zone_status_lock, callb_generic_cpr, 2627 str); 2628 mutex_enter(&zone_status_lock); 2629 while (zone->zone_status < status) { 2630 CALLB_CPR_SAFE_BEGIN(&cprinfo); 2631 cv_wait(&zone->zone_cv, &zone_status_lock); 2632 CALLB_CPR_SAFE_END(&cprinfo, &zone_status_lock); 2633 } 2634 /* 2635 * zone_status_lock is implicitly released by the following. 2636 */ 2637 CALLB_CPR_EXIT(&cprinfo); 2638 } 2639 2640 /* 2641 * Block until zone enters requested state or signal is received. Return (0) 2642 * if signaled, non-zero otherwise. 2643 */ 2644 int 2645 zone_status_wait_sig(zone_t *zone, zone_status_t status) 2646 { 2647 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE); 2648 2649 mutex_enter(&zone_status_lock); 2650 while (zone->zone_status < status) { 2651 if (!cv_wait_sig(&zone->zone_cv, &zone_status_lock)) { 2652 mutex_exit(&zone_status_lock); 2653 return (0); 2654 } 2655 } 2656 mutex_exit(&zone_status_lock); 2657 return (1); 2658 } 2659 2660 /* 2661 * Block until the zone enters the requested state or the timeout expires, 2662 * whichever happens first. Return (-1) if operation timed out, time remaining 2663 * otherwise. 2664 */ 2665 clock_t 2666 zone_status_timedwait(zone_t *zone, clock_t tim, zone_status_t status) 2667 { 2668 clock_t timeleft = 0; 2669 2670 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE); 2671 2672 mutex_enter(&zone_status_lock); 2673 while (zone->zone_status < status && timeleft != -1) { 2674 timeleft = cv_timedwait(&zone->zone_cv, &zone_status_lock, tim); 2675 } 2676 mutex_exit(&zone_status_lock); 2677 return (timeleft); 2678 } 2679 2680 /* 2681 * Block until the zone enters the requested state, the current process is 2682 * signaled, or the timeout expires, whichever happens first. Return (-1) if 2683 * operation timed out, 0 if signaled, time remaining otherwise. 2684 */ 2685 clock_t 2686 zone_status_timedwait_sig(zone_t *zone, clock_t tim, zone_status_t status) 2687 { 2688 clock_t timeleft = tim - ddi_get_lbolt(); 2689 2690 ASSERT(status > ZONE_MIN_STATE && status <= ZONE_MAX_STATE); 2691 2692 mutex_enter(&zone_status_lock); 2693 while (zone->zone_status < status) { 2694 timeleft = cv_timedwait_sig(&zone->zone_cv, &zone_status_lock, 2695 tim); 2696 if (timeleft <= 0) 2697 break; 2698 } 2699 mutex_exit(&zone_status_lock); 2700 return (timeleft); 2701 } 2702 2703 /* 2704 * Zones have two reference counts: one for references from credential 2705 * structures (zone_cred_ref), and one (zone_ref) for everything else. 2706 * This is so we can allow a zone to be rebooted while there are still 2707 * outstanding cred references, since certain drivers cache dblks (which 2708 * implicitly results in cached creds). We wait for zone_ref to drop to 2709 * 0 (actually 1), but not zone_cred_ref. The zone structure itself is 2710 * later freed when the zone_cred_ref drops to 0, though nothing other 2711 * than the zone id and privilege set should be accessed once the zone 2712 * is "dead". 2713 * 2714 * A debugging flag, zone_wait_for_cred, can be set to a non-zero value 2715 * to force halt/reboot to block waiting for the zone_cred_ref to drop 2716 * to 0. This can be useful to flush out other sources of cached creds 2717 * that may be less innocuous than the driver case. 2718 * 2719 * Zones also provide a tracked reference counting mechanism in which zone 2720 * references are represented by "crumbs" (zone_ref structures). Crumbs help 2721 * debuggers determine the sources of leaked zone references. See 2722 * zone_hold_ref() and zone_rele_ref() below for more information. 2723 */ 2724 2725 int zone_wait_for_cred = 0; 2726 2727 static void 2728 zone_hold_locked(zone_t *z) 2729 { 2730 ASSERT(MUTEX_HELD(&z->zone_lock)); 2731 z->zone_ref++; 2732 ASSERT(z->zone_ref != 0); 2733 } 2734 2735 /* 2736 * Increment the specified zone's reference count. The zone's zone_t structure 2737 * will not be freed as long as the zone's reference count is nonzero. 2738 * Decrement the zone's reference count via zone_rele(). 2739 * 2740 * NOTE: This function should only be used to hold zones for short periods of 2741 * time. Use zone_hold_ref() if the zone must be held for a long time. 2742 */ 2743 void 2744 zone_hold(zone_t *z) 2745 { 2746 mutex_enter(&z->zone_lock); 2747 zone_hold_locked(z); 2748 mutex_exit(&z->zone_lock); 2749 } 2750 2751 /* 2752 * If the non-cred ref count drops to 1 and either the cred ref count 2753 * is 0 or we aren't waiting for cred references, the zone is ready to 2754 * be destroyed. 2755 */ 2756 #define ZONE_IS_UNREF(zone) ((zone)->zone_ref == 1 && \ 2757 (!zone_wait_for_cred || (zone)->zone_cred_ref == 0)) 2758 2759 /* 2760 * Common zone reference release function invoked by zone_rele() and 2761 * zone_rele_ref(). If subsys is ZONE_REF_NUM_SUBSYS, then the specified 2762 * zone's subsystem-specific reference counters are not affected by the 2763 * release. If ref is not NULL, then the zone_ref_t to which it refers is 2764 * removed from the specified zone's reference list. ref must be non-NULL iff 2765 * subsys is not ZONE_REF_NUM_SUBSYS. 2766 */ 2767 static void 2768 zone_rele_common(zone_t *z, zone_ref_t *ref, zone_ref_subsys_t subsys) 2769 { 2770 boolean_t wakeup; 2771 2772 mutex_enter(&z->zone_lock); 2773 ASSERT(z->zone_ref != 0); 2774 z->zone_ref--; 2775 if (subsys != ZONE_REF_NUM_SUBSYS) { 2776 ASSERT(z->zone_subsys_ref[subsys] != 0); 2777 z->zone_subsys_ref[subsys]--; 2778 list_remove(&z->zone_ref_list, ref); 2779 } 2780 if (z->zone_ref == 0 && z->zone_cred_ref == 0) { 2781 /* no more refs, free the structure */ 2782 mutex_exit(&z->zone_lock); 2783 zone_free(z); 2784 return; 2785 } 2786 /* signal zone_destroy so the zone can finish halting */ 2787 wakeup = (ZONE_IS_UNREF(z) && zone_status_get(z) >= ZONE_IS_DEAD); 2788 mutex_exit(&z->zone_lock); 2789 2790 if (wakeup) { 2791 /* 2792 * Grabbing zonehash_lock here effectively synchronizes with 2793 * zone_destroy() to avoid missed signals. 2794 */ 2795 mutex_enter(&zonehash_lock); 2796 cv_broadcast(&zone_destroy_cv); 2797 mutex_exit(&zonehash_lock); 2798 } 2799 } 2800 2801 /* 2802 * Decrement the specified zone's reference count. The specified zone will 2803 * cease to exist after this function returns if the reference count drops to 2804 * zero. This function should be paired with zone_hold(). 2805 */ 2806 void 2807 zone_rele(zone_t *z) 2808 { 2809 zone_rele_common(z, NULL, ZONE_REF_NUM_SUBSYS); 2810 } 2811 2812 /* 2813 * Initialize a zone reference structure. This function must be invoked for 2814 * a reference structure before the structure is passed to zone_hold_ref(). 2815 */ 2816 void 2817 zone_init_ref(zone_ref_t *ref) 2818 { 2819 ref->zref_zone = NULL; 2820 list_link_init(&ref->zref_linkage); 2821 } 2822 2823 /* 2824 * Acquire a reference to zone z. The caller must specify the 2825 * zone_ref_subsys_t constant associated with its subsystem. The specified 2826 * zone_ref_t structure will represent a reference to the specified zone. Use 2827 * zone_rele_ref() to release the reference. 2828 * 2829 * The referenced zone_t structure will not be freed as long as the zone_t's 2830 * zone_status field is not ZONE_IS_DEAD and the zone has outstanding 2831 * references. 2832 * 2833 * NOTE: The zone_ref_t structure must be initialized before it is used. 2834 * See zone_init_ref() above. 2835 */ 2836 void 2837 zone_hold_ref(zone_t *z, zone_ref_t *ref, zone_ref_subsys_t subsys) 2838 { 2839 ASSERT(subsys >= 0 && subsys < ZONE_REF_NUM_SUBSYS); 2840 2841 /* 2842 * Prevent consumers from reusing a reference structure before 2843 * releasing it. 2844 */ 2845 VERIFY(ref->zref_zone == NULL); 2846 2847 ref->zref_zone = z; 2848 mutex_enter(&z->zone_lock); 2849 zone_hold_locked(z); 2850 z->zone_subsys_ref[subsys]++; 2851 ASSERT(z->zone_subsys_ref[subsys] != 0); 2852 list_insert_head(&z->zone_ref_list, ref); 2853 mutex_exit(&z->zone_lock); 2854 } 2855 2856 /* 2857 * Release the zone reference represented by the specified zone_ref_t. 2858 * The reference is invalid after it's released; however, the zone_ref_t 2859 * structure can be reused without having to invoke zone_init_ref(). 2860 * subsys should be the same value that was passed to zone_hold_ref() 2861 * when the reference was acquired. 2862 */ 2863 void 2864 zone_rele_ref(zone_ref_t *ref, zone_ref_subsys_t subsys) 2865 { 2866 zone_rele_common(ref->zref_zone, ref, subsys); 2867 2868 /* 2869 * Set the zone_ref_t's zref_zone field to NULL to generate panics 2870 * when consumers dereference the reference. This helps us catch 2871 * consumers who use released references. Furthermore, this lets 2872 * consumers reuse the zone_ref_t structure without having to 2873 * invoke zone_init_ref(). 2874 */ 2875 ref->zref_zone = NULL; 2876 } 2877 2878 void 2879 zone_cred_hold(zone_t *z) 2880 { 2881 mutex_enter(&z->zone_lock); 2882 z->zone_cred_ref++; 2883 ASSERT(z->zone_cred_ref != 0); 2884 mutex_exit(&z->zone_lock); 2885 } 2886 2887 void 2888 zone_cred_rele(zone_t *z) 2889 { 2890 boolean_t wakeup; 2891 2892 mutex_enter(&z->zone_lock); 2893 ASSERT(z->zone_cred_ref != 0); 2894 z->zone_cred_ref--; 2895 if (z->zone_ref == 0 && z->zone_cred_ref == 0) { 2896 /* no more refs, free the structure */ 2897 mutex_exit(&z->zone_lock); 2898 zone_free(z); 2899 return; 2900 } 2901 /* 2902 * If zone_destroy is waiting for the cred references to drain 2903 * out, and they have, signal it. 2904 */ 2905 wakeup = (zone_wait_for_cred && ZONE_IS_UNREF(z) && 2906 zone_status_get(z) >= ZONE_IS_DEAD); 2907 mutex_exit(&z->zone_lock); 2908 2909 if (wakeup) { 2910 /* 2911 * Grabbing zonehash_lock here effectively synchronizes with 2912 * zone_destroy() to avoid missed signals. 2913 */ 2914 mutex_enter(&zonehash_lock); 2915 cv_broadcast(&zone_destroy_cv); 2916 mutex_exit(&zonehash_lock); 2917 } 2918 } 2919 2920 void 2921 zone_task_hold(zone_t *z) 2922 { 2923 mutex_enter(&z->zone_lock); 2924 z->zone_ntasks++; 2925 ASSERT(z->zone_ntasks != 0); 2926 mutex_exit(&z->zone_lock); 2927 } 2928 2929 void 2930 zone_task_rele(zone_t *zone) 2931 { 2932 uint_t refcnt; 2933 2934 mutex_enter(&zone->zone_lock); 2935 ASSERT(zone->zone_ntasks != 0); 2936 refcnt = --zone->zone_ntasks; 2937 if (refcnt > 1) { /* Common case */ 2938 mutex_exit(&zone->zone_lock); 2939 return; 2940 } 2941 zone_hold_locked(zone); /* so we can use the zone_t later */ 2942 mutex_exit(&zone->zone_lock); 2943 if (refcnt == 1) { 2944 /* 2945 * See if the zone is shutting down. 2946 */ 2947 mutex_enter(&zone_status_lock); 2948 if (zone_status_get(zone) != ZONE_IS_SHUTTING_DOWN) { 2949 goto out; 2950 } 2951 2952 /* 2953 * Make sure the ntasks didn't change since we 2954 * dropped zone_lock. 2955 */ 2956 mutex_enter(&zone->zone_lock); 2957 if (refcnt != zone->zone_ntasks) { 2958 mutex_exit(&zone->zone_lock); 2959 goto out; 2960 } 2961 mutex_exit(&zone->zone_lock); 2962 2963 /* 2964 * No more user processes in the zone. The zone is empty. 2965 */ 2966 zone_status_set(zone, ZONE_IS_EMPTY); 2967 goto out; 2968 } 2969 2970 ASSERT(refcnt == 0); 2971 /* 2972 * zsched has exited; the zone is dead. 2973 */ 2974 zone->zone_zsched = NULL; /* paranoia */ 2975 mutex_enter(&zone_status_lock); 2976 zone_status_set(zone, ZONE_IS_DEAD); 2977 out: 2978 mutex_exit(&zone_status_lock); 2979 zone_rele(zone); 2980 } 2981 2982 zoneid_t 2983 getzoneid(void) 2984 { 2985 return (curproc->p_zone->zone_id); 2986 } 2987 2988 /* 2989 * Internal versions of zone_find_by_*(). These don't zone_hold() or 2990 * check the validity of a zone's state. 2991 */ 2992 static zone_t * 2993 zone_find_all_by_id(zoneid_t zoneid) 2994 { 2995 mod_hash_val_t hv; 2996 zone_t *zone = NULL; 2997 2998 ASSERT(MUTEX_HELD(&zonehash_lock)); 2999 3000 if (mod_hash_find(zonehashbyid, 3001 (mod_hash_key_t)(uintptr_t)zoneid, &hv) == 0) 3002 zone = (zone_t *)hv; 3003 return (zone); 3004 } 3005 3006 static zone_t * 3007 zone_find_all_by_label(const ts_label_t *label) 3008 { 3009 mod_hash_val_t hv; 3010 zone_t *zone = NULL; 3011 3012 ASSERT(MUTEX_HELD(&zonehash_lock)); 3013 3014 /* 3015 * zonehashbylabel is not maintained for unlabeled systems 3016 */ 3017 if (!is_system_labeled()) 3018 return (NULL); 3019 if (mod_hash_find(zonehashbylabel, (mod_hash_key_t)label, &hv) == 0) 3020 zone = (zone_t *)hv; 3021 return (zone); 3022 } 3023 3024 static zone_t * 3025 zone_find_all_by_name(char *name) 3026 { 3027 mod_hash_val_t hv; 3028 zone_t *zone = NULL; 3029 3030 ASSERT(MUTEX_HELD(&zonehash_lock)); 3031 3032 if (mod_hash_find(zonehashbyname, (mod_hash_key_t)name, &hv) == 0) 3033 zone = (zone_t *)hv; 3034 return (zone); 3035 } 3036 3037 /* 3038 * Public interface for looking up a zone by zoneid. Only returns the zone if 3039 * it is fully initialized, and has not yet begun the zone_destroy() sequence. 3040 * Caller must call zone_rele() once it is done with the zone. 3041 * 3042 * The zone may begin the zone_destroy() sequence immediately after this 3043 * function returns, but may be safely used until zone_rele() is called. 3044 */ 3045 zone_t * 3046 zone_find_by_id(zoneid_t zoneid) 3047 { 3048 zone_t *zone; 3049 zone_status_t status; 3050 3051 mutex_enter(&zonehash_lock); 3052 if ((zone = zone_find_all_by_id(zoneid)) == NULL) { 3053 mutex_exit(&zonehash_lock); 3054 return (NULL); 3055 } 3056 status = zone_status_get(zone); 3057 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) { 3058 /* 3059 * For all practical purposes the zone doesn't exist. 3060 */ 3061 mutex_exit(&zonehash_lock); 3062 return (NULL); 3063 } 3064 zone_hold(zone); 3065 mutex_exit(&zonehash_lock); 3066 return (zone); 3067 } 3068 3069 /* 3070 * Similar to zone_find_by_id, but using zone label as the key. 3071 */ 3072 zone_t * 3073 zone_find_by_label(const ts_label_t *label) 3074 { 3075 zone_t *zone; 3076 zone_status_t status; 3077 3078 mutex_enter(&zonehash_lock); 3079 if ((zone = zone_find_all_by_label(label)) == NULL) { 3080 mutex_exit(&zonehash_lock); 3081 return (NULL); 3082 } 3083 3084 status = zone_status_get(zone); 3085 if (status > ZONE_IS_DOWN) { 3086 /* 3087 * For all practical purposes the zone doesn't exist. 3088 */ 3089 mutex_exit(&zonehash_lock); 3090 return (NULL); 3091 } 3092 zone_hold(zone); 3093 mutex_exit(&zonehash_lock); 3094 return (zone); 3095 } 3096 3097 /* 3098 * Similar to zone_find_by_id, but using zone name as the key. 3099 */ 3100 zone_t * 3101 zone_find_by_name(char *name) 3102 { 3103 zone_t *zone; 3104 zone_status_t status; 3105 3106 mutex_enter(&zonehash_lock); 3107 if ((zone = zone_find_all_by_name(name)) == NULL) { 3108 mutex_exit(&zonehash_lock); 3109 return (NULL); 3110 } 3111 status = zone_status_get(zone); 3112 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) { 3113 /* 3114 * For all practical purposes the zone doesn't exist. 3115 */ 3116 mutex_exit(&zonehash_lock); 3117 return (NULL); 3118 } 3119 zone_hold(zone); 3120 mutex_exit(&zonehash_lock); 3121 return (zone); 3122 } 3123 3124 /* 3125 * Similar to zone_find_by_id(), using the path as a key. For instance, 3126 * if there is a zone "foo" rooted at /foo/root, and the path argument 3127 * is "/foo/root/proc", it will return the held zone_t corresponding to 3128 * zone "foo". 3129 * 3130 * zone_find_by_path() always returns a non-NULL value, since at the 3131 * very least every path will be contained in the global zone. 3132 * 3133 * As with the other zone_find_by_*() functions, the caller is 3134 * responsible for zone_rele()ing the return value of this function. 3135 */ 3136 zone_t * 3137 zone_find_by_path(const char *path) 3138 { 3139 zone_t *zone; 3140 zone_t *zret = NULL; 3141 zone_status_t status; 3142 3143 if (path == NULL) { 3144 /* 3145 * Call from rootconf(). 3146 */ 3147 zone_hold(global_zone); 3148 return (global_zone); 3149 } 3150 ASSERT(*path == '/'); 3151 mutex_enter(&zonehash_lock); 3152 for (zone = list_head(&zone_active); zone != NULL; 3153 zone = list_next(&zone_active, zone)) { 3154 if (ZONE_PATH_VISIBLE(path, zone)) 3155 zret = zone; 3156 } 3157 ASSERT(zret != NULL); 3158 status = zone_status_get(zret); 3159 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) { 3160 /* 3161 * Zone practically doesn't exist. 3162 */ 3163 zret = global_zone; 3164 } 3165 zone_hold(zret); 3166 mutex_exit(&zonehash_lock); 3167 return (zret); 3168 } 3169 3170 /* 3171 * Public interface for updating per-zone load averages. Called once per 3172 * second. 3173 * 3174 * Based on loadavg_update(), genloadavg() and calcloadavg() from clock.c. 3175 */ 3176 void 3177 zone_loadavg_update() 3178 { 3179 zone_t *zp; 3180 zone_status_t status; 3181 struct loadavg_s *lavg; 3182 hrtime_t zone_total; 3183 int i; 3184 hrtime_t hr_avg; 3185 int nrun; 3186 static int64_t f[3] = { 135, 27, 9 }; 3187 int64_t q, r; 3188 3189 mutex_enter(&zonehash_lock); 3190 for (zp = list_head(&zone_active); zp != NULL; 3191 zp = list_next(&zone_active, zp)) { 3192 mutex_enter(&zp->zone_lock); 3193 3194 /* Skip zones that are on the way down or not yet up */ 3195 status = zone_status_get(zp); 3196 if (status < ZONE_IS_READY || status >= ZONE_IS_DOWN) { 3197 /* For all practical purposes the zone doesn't exist. */ 3198 mutex_exit(&zp->zone_lock); 3199 continue; 3200 } 3201 3202 /* 3203 * Update the 10 second moving average data in zone_loadavg. 3204 */ 3205 lavg = &zp->zone_loadavg; 3206 3207 zone_total = zp->zone_utime + zp->zone_stime + zp->zone_wtime; 3208 scalehrtime(&zone_total); 3209 3210 /* The zone_total should always be increasing. */ 3211 lavg->lg_loads[lavg->lg_cur] = (zone_total > lavg->lg_total) ? 3212 zone_total - lavg->lg_total : 0; 3213 lavg->lg_cur = (lavg->lg_cur + 1) % S_LOADAVG_SZ; 3214 /* lg_total holds the prev. 1 sec. total */ 3215 lavg->lg_total = zone_total; 3216 3217 /* 3218 * To simplify the calculation, we don't calculate the load avg. 3219 * until the zone has been up for at least 10 seconds and our 3220 * moving average is thus full. 3221 */ 3222 if ((lavg->lg_len + 1) < S_LOADAVG_SZ) { 3223 lavg->lg_len++; 3224 mutex_exit(&zp->zone_lock); 3225 continue; 3226 } 3227 3228 /* Now calculate the 1min, 5min, 15 min load avg. */ 3229 hr_avg = 0; 3230 for (i = 0; i < S_LOADAVG_SZ; i++) 3231 hr_avg += lavg->lg_loads[i]; 3232 hr_avg = hr_avg / S_LOADAVG_SZ; 3233 nrun = hr_avg / (NANOSEC / LGRP_LOADAVG_IN_THREAD_MAX); 3234 3235 /* Compute load avg. See comment in calcloadavg() */ 3236 for (i = 0; i < 3; i++) { 3237 q = (zp->zone_hp_avenrun[i] >> 16) << 7; 3238 r = (zp->zone_hp_avenrun[i] & 0xffff) << 7; 3239 zp->zone_hp_avenrun[i] += 3240 ((nrun - q) * f[i] - ((r * f[i]) >> 16)) >> 4; 3241 3242 /* avenrun[] can only hold 31 bits of load avg. */ 3243 if (zp->zone_hp_avenrun[i] < 3244 ((uint64_t)1<<(31+16-FSHIFT))) 3245 zp->zone_avenrun[i] = (int32_t) 3246 (zp->zone_hp_avenrun[i] >> (16 - FSHIFT)); 3247 else 3248 zp->zone_avenrun[i] = 0x7fffffff; 3249 } 3250 3251 mutex_exit(&zp->zone_lock); 3252 } 3253 mutex_exit(&zonehash_lock); 3254 } 3255 3256 /* 3257 * Get the number of cpus visible to this zone. The system-wide global 3258 * 'ncpus' is returned if pools are disabled, the caller is in the 3259 * global zone, or a NULL zone argument is passed in. 3260 */ 3261 int 3262 zone_ncpus_get(zone_t *zone) 3263 { 3264 int myncpus = zone == NULL ? 0 : zone->zone_ncpus; 3265 3266 return (myncpus != 0 ? myncpus : ncpus); 3267 } 3268 3269 /* 3270 * Get the number of online cpus visible to this zone. The system-wide 3271 * global 'ncpus_online' is returned if pools are disabled, the caller 3272 * is in the global zone, or a NULL zone argument is passed in. 3273 */ 3274 int 3275 zone_ncpus_online_get(zone_t *zone) 3276 { 3277 int myncpus_online = zone == NULL ? 0 : zone->zone_ncpus_online; 3278 3279 return (myncpus_online != 0 ? myncpus_online : ncpus_online); 3280 } 3281 3282 /* 3283 * Return the pool to which the zone is currently bound. 3284 */ 3285 pool_t * 3286 zone_pool_get(zone_t *zone) 3287 { 3288 ASSERT(pool_lock_held()); 3289 3290 return (zone->zone_pool); 3291 } 3292 3293 /* 3294 * Set the zone's pool pointer and update the zone's visibility to match 3295 * the resources in the new pool. 3296 */ 3297 void 3298 zone_pool_set(zone_t *zone, pool_t *pool) 3299 { 3300 ASSERT(pool_lock_held()); 3301 ASSERT(MUTEX_HELD(&cpu_lock)); 3302 3303 zone->zone_pool = pool; 3304 zone_pset_set(zone, pool->pool_pset->pset_id); 3305 } 3306 3307 /* 3308 * Return the cached value of the id of the processor set to which the 3309 * zone is currently bound. The value will be ZONE_PS_INVAL if the pools 3310 * facility is disabled. 3311 */ 3312 psetid_t 3313 zone_pset_get(zone_t *zone) 3314 { 3315 ASSERT(MUTEX_HELD(&cpu_lock)); 3316 3317 return (zone->zone_psetid); 3318 } 3319 3320 /* 3321 * Set the cached value of the id of the processor set to which the zone 3322 * is currently bound. Also update the zone's visibility to match the 3323 * resources in the new processor set. 3324 */ 3325 void 3326 zone_pset_set(zone_t *zone, psetid_t newpsetid) 3327 { 3328 psetid_t oldpsetid; 3329 3330 ASSERT(MUTEX_HELD(&cpu_lock)); 3331 oldpsetid = zone_pset_get(zone); 3332 3333 if (oldpsetid == newpsetid) 3334 return; 3335 /* 3336 * Global zone sees all. 3337 */ 3338 if (zone != global_zone) { 3339 zone->zone_psetid = newpsetid; 3340 if (newpsetid != ZONE_PS_INVAL) 3341 pool_pset_visibility_add(newpsetid, zone); 3342 if (oldpsetid != ZONE_PS_INVAL) 3343 pool_pset_visibility_remove(oldpsetid, zone); 3344 } 3345 /* 3346 * Disabling pools, so we should start using the global values 3347 * for ncpus and ncpus_online. 3348 */ 3349 if (newpsetid == ZONE_PS_INVAL) { 3350 zone->zone_ncpus = 0; 3351 zone->zone_ncpus_online = 0; 3352 } 3353 } 3354 3355 /* 3356 * Walk the list of active zones and issue the provided callback for 3357 * each of them. 3358 * 3359 * Caller must not be holding any locks that may be acquired under 3360 * zonehash_lock. See comment at the beginning of the file for a list of 3361 * common locks and their interactions with zones. 3362 */ 3363 int 3364 zone_walk(int (*cb)(zone_t *, void *), void *data) 3365 { 3366 zone_t *zone; 3367 int ret = 0; 3368 zone_status_t status; 3369 3370 mutex_enter(&zonehash_lock); 3371 for (zone = list_head(&zone_active); zone != NULL; 3372 zone = list_next(&zone_active, zone)) { 3373 /* 3374 * Skip zones that shouldn't be externally visible. 3375 */ 3376 status = zone_status_get(zone); 3377 if (status < ZONE_IS_READY || status > ZONE_IS_DOWN) 3378 continue; 3379 /* 3380 * Bail immediately if any callback invocation returns a 3381 * non-zero value. 3382 */ 3383 ret = (*cb)(zone, data); 3384 if (ret != 0) 3385 break; 3386 } 3387 mutex_exit(&zonehash_lock); 3388 return (ret); 3389 } 3390 3391 static int 3392 zone_set_root(zone_t *zone, const char *upath) 3393 { 3394 vnode_t *vp; 3395 int trycount; 3396 int error = 0; 3397 char *path; 3398 struct pathname upn, pn; 3399 size_t pathlen; 3400 3401 if ((error = pn_get((char *)upath, UIO_USERSPACE, &upn)) != 0) 3402 return (error); 3403 3404 pn_alloc(&pn); 3405 3406 /* prevent infinite loop */ 3407 trycount = 10; 3408 for (;;) { 3409 if (--trycount <= 0) { 3410 error = ESTALE; 3411 goto out; 3412 } 3413 3414 if ((error = lookuppn(&upn, &pn, FOLLOW, NULLVPP, &vp)) == 0) { 3415 /* 3416 * VOP_ACCESS() may cover 'vp' with a new 3417 * filesystem, if 'vp' is an autoFS vnode. 3418 * Get the new 'vp' if so. 3419 */ 3420 if ((error = 3421 VOP_ACCESS(vp, VEXEC, 0, CRED(), NULL)) == 0 && 3422 (!vn_ismntpt(vp) || 3423 (error = traverse(&vp)) == 0)) { 3424 pathlen = pn.pn_pathlen + 2; 3425 path = kmem_alloc(pathlen, KM_SLEEP); 3426 (void) strncpy(path, pn.pn_path, 3427 pn.pn_pathlen + 1); 3428 path[pathlen - 2] = '/'; 3429 path[pathlen - 1] = '\0'; 3430 pn_free(&pn); 3431 pn_free(&upn); 3432 3433 /* Success! */ 3434 break; 3435 } 3436 VN_RELE(vp); 3437 } 3438 if (error != ESTALE) 3439 goto out; 3440 } 3441 3442 ASSERT(error == 0); 3443 zone->zone_rootvp = vp; /* we hold a reference to vp */ 3444 zone->zone_rootpath = path; 3445 zone->zone_rootpathlen = pathlen; 3446 if (pathlen > 5 && strcmp(path + pathlen - 5, "/lu/") == 0) 3447 zone->zone_flags |= ZF_IS_SCRATCH; 3448 return (0); 3449 3450 out: 3451 pn_free(&pn); 3452 pn_free(&upn); 3453 return (error); 3454 } 3455 3456 #define isalnum(c) (((c) >= '0' && (c) <= '9') || \ 3457 ((c) >= 'a' && (c) <= 'z') || \ 3458 ((c) >= 'A' && (c) <= 'Z')) 3459 3460 static int 3461 zone_set_name(zone_t *zone, const char *uname) 3462 { 3463 char *kname = kmem_zalloc(ZONENAME_MAX, KM_SLEEP); 3464 size_t len; 3465 int i, err; 3466 3467 if ((err = copyinstr(uname, kname, ZONENAME_MAX, &len)) != 0) { 3468 kmem_free(kname, ZONENAME_MAX); 3469 return (err); /* EFAULT or ENAMETOOLONG */ 3470 } 3471 3472 /* must be less than ZONENAME_MAX */ 3473 if (len == ZONENAME_MAX && kname[ZONENAME_MAX - 1] != '\0') { 3474 kmem_free(kname, ZONENAME_MAX); 3475 return (EINVAL); 3476 } 3477 3478 /* 3479 * Name must start with an alphanumeric and must contain only 3480 * alphanumerics, '-', '_' and '.'. 3481 */ 3482 if (!isalnum(kname[0])) { 3483 kmem_free(kname, ZONENAME_MAX); 3484 return (EINVAL); 3485 } 3486 for (i = 1; i < len - 1; i++) { 3487 if (!isalnum(kname[i]) && kname[i] != '-' && kname[i] != '_' && 3488 kname[i] != '.') { 3489 kmem_free(kname, ZONENAME_MAX); 3490 return (EINVAL); 3491 } 3492 } 3493 3494 zone->zone_name = kname; 3495 return (0); 3496 } 3497 3498 /* 3499 * Gets the 32-bit hostid of the specified zone as an unsigned int. If 'zonep' 3500 * is NULL or it points to a zone with no hostid emulation, then the machine's 3501 * hostid (i.e., the global zone's hostid) is returned. This function returns 3502 * zero if neither the zone nor the host machine (global zone) have hostids. It 3503 * returns HW_INVALID_HOSTID if the function attempts to return the machine's 3504 * hostid and the machine's hostid is invalid. 3505 */ 3506 uint32_t 3507 zone_get_hostid(zone_t *zonep) 3508 { 3509 unsigned long machine_hostid; 3510 3511 if (zonep == NULL || zonep->zone_hostid == HW_INVALID_HOSTID) { 3512 if (ddi_strtoul(hw_serial, NULL, 10, &machine_hostid) != 0) 3513 return (HW_INVALID_HOSTID); 3514 return ((uint32_t)machine_hostid); 3515 } 3516 return (zonep->zone_hostid); 3517 } 3518 3519 /* 3520 * Similar to thread_create(), but makes sure the thread is in the appropriate 3521 * zone's zsched process (curproc->p_zone->zone_zsched) before returning. 3522 */ 3523 /*ARGSUSED*/ 3524 kthread_t * 3525 zthread_create( 3526 caddr_t stk, 3527 size_t stksize, 3528 void (*proc)(), 3529 void *arg, 3530 size_t len, 3531 pri_t pri) 3532 { 3533 kthread_t *t; 3534 zone_t *zone = curproc->p_zone; 3535 proc_t *pp = zone->zone_zsched; 3536 3537 zone_hold(zone); /* Reference to be dropped when thread exits */ 3538 3539 /* 3540 * No-one should be trying to create threads if the zone is shutting 3541 * down and there aren't any kernel threads around. See comment 3542 * in zthread_exit(). 3543 */ 3544 ASSERT(!(zone->zone_kthreads == NULL && 3545 zone_status_get(zone) >= ZONE_IS_EMPTY)); 3546 /* 3547 * Create a thread, but don't let it run until we've finished setting 3548 * things up. 3549 */ 3550 t = thread_create(stk, stksize, proc, arg, len, pp, TS_STOPPED, pri); 3551 ASSERT(t->t_forw == NULL); 3552 mutex_enter(&zone_status_lock); 3553 if (zone->zone_kthreads == NULL) { 3554 t->t_forw = t->t_back = t; 3555 } else { 3556 kthread_t *tx = zone->zone_kthreads; 3557 3558 t->t_forw = tx; 3559 t->t_back = tx->t_back; 3560 tx->t_back->t_forw = t; 3561 tx->t_back = t; 3562 } 3563 zone->zone_kthreads = t; 3564 mutex_exit(&zone_status_lock); 3565 3566 mutex_enter(&pp->p_lock); 3567 t->t_proc_flag |= TP_ZTHREAD; 3568 project_rele(t->t_proj); 3569 t->t_proj = project_hold(pp->p_task->tk_proj); 3570 3571 /* 3572 * Setup complete, let it run. 3573 */ 3574 thread_lock(t); 3575 t->t_schedflag |= TS_ALLSTART; 3576 setrun_locked(t); 3577 thread_unlock(t); 3578 3579 mutex_exit(&pp->p_lock); 3580 3581 return (t); 3582 } 3583 3584 /* 3585 * Similar to thread_exit(). Must be called by threads created via 3586 * zthread_exit(). 3587 */ 3588 void 3589 zthread_exit(void) 3590 { 3591 kthread_t *t = curthread; 3592 proc_t *pp = curproc; 3593 zone_t *zone = pp->p_zone; 3594 3595 mutex_enter(&zone_status_lock); 3596 3597 /* 3598 * Reparent to p0 3599 */ 3600 kpreempt_disable(); 3601 mutex_enter(&pp->p_lock); 3602 t->t_proc_flag &= ~TP_ZTHREAD; 3603 t->t_procp = &p0; 3604 hat_thread_exit(t); 3605 mutex_exit(&pp->p_lock); 3606 kpreempt_enable(); 3607 3608 if (t->t_back == t) { 3609 ASSERT(t->t_forw == t); 3610 /* 3611 * If the zone is empty, once the thread count 3612 * goes to zero no further kernel threads can be 3613 * created. This is because if the creator is a process 3614 * in the zone, then it must have exited before the zone 3615 * state could be set to ZONE_IS_EMPTY. 3616 * Otherwise, if the creator is a kernel thread in the 3617 * zone, the thread count is non-zero. 3618 * 3619 * This really means that non-zone kernel threads should 3620 * not create zone kernel threads. 3621 */ 3622 zone->zone_kthreads = NULL; 3623 if (zone_status_get(zone) == ZONE_IS_EMPTY) { 3624 zone_status_set(zone, ZONE_IS_DOWN); 3625 /* 3626 * Remove any CPU caps on this zone. 3627 */ 3628 cpucaps_zone_remove(zone); 3629 } 3630 } else { 3631 t->t_forw->t_back = t->t_back; 3632 t->t_back->t_forw = t->t_forw; 3633 if (zone->zone_kthreads == t) 3634 zone->zone_kthreads = t->t_forw; 3635 } 3636 mutex_exit(&zone_status_lock); 3637 zone_rele(zone); 3638 thread_exit(); 3639 /* NOTREACHED */ 3640 } 3641 3642 static void 3643 zone_chdir(vnode_t *vp, vnode_t **vpp, proc_t *pp) 3644 { 3645 vnode_t *oldvp; 3646 3647 /* we're going to hold a reference here to the directory */ 3648 VN_HOLD(vp); 3649 3650 /* update abs cwd/root path see c2/audit.c */ 3651 if (AU_AUDITING()) 3652 audit_chdirec(vp, vpp); 3653 3654 mutex_enter(&pp->p_lock); 3655 oldvp = *vpp; 3656 *vpp = vp; 3657 mutex_exit(&pp->p_lock); 3658 if (oldvp != NULL) 3659 VN_RELE(oldvp); 3660 } 3661 3662 /* 3663 * Convert an rctl value represented by an nvlist_t into an rctl_val_t. 3664 */ 3665 static int 3666 nvlist2rctlval(nvlist_t *nvl, rctl_val_t *rv) 3667 { 3668 nvpair_t *nvp = NULL; 3669 boolean_t priv_set = B_FALSE; 3670 boolean_t limit_set = B_FALSE; 3671 boolean_t action_set = B_FALSE; 3672 3673 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) { 3674 const char *name; 3675 uint64_t ui64; 3676 3677 name = nvpair_name(nvp); 3678 if (nvpair_type(nvp) != DATA_TYPE_UINT64) 3679 return (EINVAL); 3680 (void) nvpair_value_uint64(nvp, &ui64); 3681 if (strcmp(name, "privilege") == 0) { 3682 /* 3683 * Currently only privileged values are allowed, but 3684 * this may change in the future. 3685 */ 3686 if (ui64 != RCPRIV_PRIVILEGED) 3687 return (EINVAL); 3688 rv->rcv_privilege = ui64; 3689 priv_set = B_TRUE; 3690 } else if (strcmp(name, "limit") == 0) { 3691 rv->rcv_value = ui64; 3692 limit_set = B_TRUE; 3693 } else if (strcmp(name, "action") == 0) { 3694 if (ui64 != RCTL_LOCAL_NOACTION && 3695 ui64 != RCTL_LOCAL_DENY) 3696 return (EINVAL); 3697 rv->rcv_flagaction = ui64; 3698 action_set = B_TRUE; 3699 } else { 3700 return (EINVAL); 3701 } 3702 } 3703 3704 if (!(priv_set && limit_set && action_set)) 3705 return (EINVAL); 3706 rv->rcv_action_signal = 0; 3707 rv->rcv_action_recipient = NULL; 3708 rv->rcv_action_recip_pid = -1; 3709 rv->rcv_firing_time = 0; 3710 3711 return (0); 3712 } 3713 3714 /* 3715 * Non-global zone version of start_init. 3716 */ 3717 void 3718 zone_start_init(void) 3719 { 3720 proc_t *p = ttoproc(curthread); 3721 zone_t *z = p->p_zone; 3722 3723 ASSERT(!INGLOBALZONE(curproc)); 3724 3725 /* 3726 * For all purposes (ZONE_ATTR_INITPID and restart_init), 3727 * storing just the pid of init is sufficient. 3728 */ 3729 z->zone_proc_initpid = p->p_pid; 3730 3731 /* 3732 * We maintain zone_boot_err so that we can return the cause of the 3733 * failure back to the caller of the zone_boot syscall. 3734 */ 3735 p->p_zone->zone_boot_err = start_init_common(); 3736 3737 /* 3738 * We will prevent booting zones from becoming running zones if the 3739 * global zone is shutting down. 3740 */ 3741 mutex_enter(&zone_status_lock); 3742 if (z->zone_boot_err != 0 || zone_status_get(global_zone) >= 3743 ZONE_IS_SHUTTING_DOWN) { 3744 /* 3745 * Make sure we are still in the booting state-- we could have 3746 * raced and already be shutting down, or even further along. 3747 */ 3748 if (zone_status_get(z) == ZONE_IS_BOOTING) { 3749 zone_status_set(z, ZONE_IS_SHUTTING_DOWN); 3750 } 3751 mutex_exit(&zone_status_lock); 3752 /* It's gone bad, dispose of the process */ 3753 if (proc_exit(CLD_EXITED, z->zone_boot_err) != 0) { 3754 mutex_enter(&p->p_lock); 3755 ASSERT(p->p_flag & SEXITLWPS); 3756 lwp_exit(); 3757 } 3758 } else { 3759 if (zone_status_get(z) == ZONE_IS_BOOTING) 3760 zone_status_set(z, ZONE_IS_RUNNING); 3761 mutex_exit(&zone_status_lock); 3762 /* cause the process to return to userland. */ 3763 lwp_rtt(); 3764 } 3765 } 3766 3767 struct zsched_arg { 3768 zone_t *zone; 3769 nvlist_t *nvlist; 3770 }; 3771 3772 /* 3773 * Per-zone "sched" workalike. The similarity to "sched" doesn't have 3774 * anything to do with scheduling, but rather with the fact that 3775 * per-zone kernel threads are parented to zsched, just like regular 3776 * kernel threads are parented to sched (p0). 3777 * 3778 * zsched is also responsible for launching init for the zone. 3779 */ 3780 static void 3781 zsched(void *arg) 3782 { 3783 struct zsched_arg *za = arg; 3784 proc_t *pp = curproc; 3785 proc_t *initp = proc_init; 3786 zone_t *zone = za->zone; 3787 cred_t *cr, *oldcred; 3788 rctl_set_t *set; 3789 rctl_alloc_gp_t *gp; 3790 contract_t *ct = NULL; 3791 task_t *tk, *oldtk; 3792 rctl_entity_p_t e; 3793 kproject_t *pj; 3794 3795 nvlist_t *nvl = za->nvlist; 3796 nvpair_t *nvp = NULL; 3797 3798 bcopy("zsched", PTOU(pp)->u_psargs, sizeof ("zsched")); 3799 bcopy("zsched", PTOU(pp)->u_comm, sizeof ("zsched")); 3800 PTOU(pp)->u_argc = 0; 3801 PTOU(pp)->u_argv = NULL; 3802 PTOU(pp)->u_envp = NULL; 3803 closeall(P_FINFO(pp)); 3804 3805 /* 3806 * We are this zone's "zsched" process. As the zone isn't generally 3807 * visible yet we don't need to grab any locks before initializing its 3808 * zone_proc pointer. 3809 */ 3810 zone_hold(zone); /* this hold is released by zone_destroy() */ 3811 zone->zone_zsched = pp; 3812 mutex_enter(&pp->p_lock); 3813 pp->p_zone = zone; 3814 mutex_exit(&pp->p_lock); 3815 3816 /* 3817 * Disassociate process from its 'parent'; parent ourselves to init 3818 * (pid 1) and change other values as needed. 3819 */ 3820 sess_create(); 3821 3822 mutex_enter(&pidlock); 3823 proc_detach(pp); 3824 pp->p_ppid = 1; 3825 pp->p_flag |= SZONETOP; 3826 pp->p_ancpid = 1; 3827 pp->p_parent = initp; 3828 pp->p_psibling = NULL; 3829 if (initp->p_child) 3830 initp->p_child->p_psibling = pp; 3831 pp->p_sibling = initp->p_child; 3832 initp->p_child = pp; 3833 3834 /* Decrement what newproc() incremented. */ 3835 upcount_dec(crgetruid(CRED()), GLOBAL_ZONEID); 3836 /* 3837 * Our credentials are about to become kcred-like, so we don't care 3838 * about the caller's ruid. 3839 */ 3840 upcount_inc(crgetruid(kcred), zone->zone_id); 3841 mutex_exit(&pidlock); 3842 3843 /* 3844 * getting out of global zone, so decrement lwp and process counts 3845 */ 3846 pj = pp->p_task->tk_proj; 3847 mutex_enter(&global_zone->zone_nlwps_lock); 3848 pj->kpj_nlwps -= pp->p_lwpcnt; 3849 global_zone->zone_nlwps -= pp->p_lwpcnt; 3850 pj->kpj_nprocs--; 3851 global_zone->zone_nprocs--; 3852 mutex_exit(&global_zone->zone_nlwps_lock); 3853 3854 /* 3855 * Decrement locked memory counts on old zone and project. 3856 */ 3857 mutex_enter(&global_zone->zone_mem_lock); 3858 global_zone->zone_locked_mem -= pp->p_locked_mem; 3859 pj->kpj_data.kpd_locked_mem -= pp->p_locked_mem; 3860 mutex_exit(&global_zone->zone_mem_lock); 3861 3862 /* 3863 * Create and join a new task in project '0' of this zone. 3864 * 3865 * We don't need to call holdlwps() since we know we're the only lwp in 3866 * this process. 3867 * 3868 * task_join() returns with p_lock held. 3869 */ 3870 tk = task_create(0, zone); 3871 mutex_enter(&cpu_lock); 3872 oldtk = task_join(tk, 0); 3873 3874 pj = pp->p_task->tk_proj; 3875 3876 mutex_enter(&zone->zone_mem_lock); 3877 zone->zone_locked_mem += pp->p_locked_mem; 3878 pj->kpj_data.kpd_locked_mem += pp->p_locked_mem; 3879 mutex_exit(&zone->zone_mem_lock); 3880 3881 /* 3882 * add lwp and process counts to zsched's zone, and increment 3883 * project's task and process count due to the task created in 3884 * the above task_create. 3885 */ 3886 mutex_enter(&zone->zone_nlwps_lock); 3887 pj->kpj_nlwps += pp->p_lwpcnt; 3888 pj->kpj_ntasks += 1; 3889 zone->zone_nlwps += pp->p_lwpcnt; 3890 pj->kpj_nprocs++; 3891 zone->zone_nprocs++; 3892 mutex_exit(&zone->zone_nlwps_lock); 3893 3894 mutex_exit(&curproc->p_lock); 3895 mutex_exit(&cpu_lock); 3896 task_rele(oldtk); 3897 3898 /* 3899 * The process was created by a process in the global zone, hence the 3900 * credentials are wrong. We might as well have kcred-ish credentials. 3901 */ 3902 cr = zone->zone_kcred; 3903 crhold(cr); 3904 mutex_enter(&pp->p_crlock); 3905 oldcred = pp->p_cred; 3906 pp->p_cred = cr; 3907 mutex_exit(&pp->p_crlock); 3908 crfree(oldcred); 3909 3910 /* 3911 * Hold credentials again (for thread) 3912 */ 3913 crhold(cr); 3914 3915 /* 3916 * p_lwpcnt can't change since this is a kernel process. 3917 */ 3918 crset(pp, cr); 3919 3920 /* 3921 * Chroot 3922 */ 3923 zone_chdir(zone->zone_rootvp, &PTOU(pp)->u_cdir, pp); 3924 zone_chdir(zone->zone_rootvp, &PTOU(pp)->u_rdir, pp); 3925 3926 /* 3927 * Initialize zone's rctl set. 3928 */ 3929 set = rctl_set_create(); 3930 gp = rctl_set_init_prealloc(RCENTITY_ZONE); 3931 mutex_enter(&pp->p_lock); 3932 e.rcep_p.zone = zone; 3933 e.rcep_t = RCENTITY_ZONE; 3934 zone->zone_rctls = rctl_set_init(RCENTITY_ZONE, pp, &e, set, gp); 3935 mutex_exit(&pp->p_lock); 3936 rctl_prealloc_destroy(gp); 3937 3938 /* 3939 * Apply the rctls passed in to zone_create(). This is basically a list 3940 * assignment: all of the old values are removed and the new ones 3941 * inserted. That is, if an empty list is passed in, all values are 3942 * removed. 3943 */ 3944 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) { 3945 rctl_dict_entry_t *rde; 3946 rctl_hndl_t hndl; 3947 char *name; 3948 nvlist_t **nvlarray; 3949 uint_t i, nelem; 3950 int error; /* For ASSERT()s */ 3951 3952 name = nvpair_name(nvp); 3953 hndl = rctl_hndl_lookup(name); 3954 ASSERT(hndl != -1); 3955 rde = rctl_dict_lookup_hndl(hndl); 3956 ASSERT(rde != NULL); 3957 3958 for (; /* ever */; ) { 3959 rctl_val_t oval; 3960 3961 mutex_enter(&pp->p_lock); 3962 error = rctl_local_get(hndl, NULL, &oval, pp); 3963 mutex_exit(&pp->p_lock); 3964 ASSERT(error == 0); /* Can't fail for RCTL_FIRST */ 3965 ASSERT(oval.rcv_privilege != RCPRIV_BASIC); 3966 if (oval.rcv_privilege == RCPRIV_SYSTEM) 3967 break; 3968 mutex_enter(&pp->p_lock); 3969 error = rctl_local_delete(hndl, &oval, pp); 3970 mutex_exit(&pp->p_lock); 3971 ASSERT(error == 0); 3972 } 3973 error = nvpair_value_nvlist_array(nvp, &nvlarray, &nelem); 3974 ASSERT(error == 0); 3975 for (i = 0; i < nelem; i++) { 3976 rctl_val_t *nvalp; 3977 3978 nvalp = kmem_cache_alloc(rctl_val_cache, KM_SLEEP); 3979 error = nvlist2rctlval(nvlarray[i], nvalp); 3980 ASSERT(error == 0); 3981 /* 3982 * rctl_local_insert can fail if the value being 3983 * inserted is a duplicate; this is OK. 3984 */ 3985 mutex_enter(&pp->p_lock); 3986 if (rctl_local_insert(hndl, nvalp, pp) != 0) 3987 kmem_cache_free(rctl_val_cache, nvalp); 3988 mutex_exit(&pp->p_lock); 3989 } 3990 } 3991 /* 3992 * Tell the world that we're done setting up. 3993 * 3994 * At this point we want to set the zone status to ZONE_IS_INITIALIZED 3995 * and atomically set the zone's processor set visibility. Once 3996 * we drop pool_lock() this zone will automatically get updated 3997 * to reflect any future changes to the pools configuration. 3998 * 3999 * Note that after we drop the locks below (zonehash_lock in 4000 * particular) other operations such as a zone_getattr call can 4001 * now proceed and observe the zone. That is the reason for doing a 4002 * state transition to the INITIALIZED state. 4003 */ 4004 pool_lock(); 4005 mutex_enter(&cpu_lock); 4006 mutex_enter(&zonehash_lock); 4007 zone_uniqid(zone); 4008 zone_zsd_configure(zone); 4009 if (pool_state == POOL_ENABLED) 4010 zone_pset_set(zone, pool_default->pool_pset->pset_id); 4011 mutex_enter(&zone_status_lock); 4012 ASSERT(zone_status_get(zone) == ZONE_IS_UNINITIALIZED); 4013 zone_status_set(zone, ZONE_IS_INITIALIZED); 4014 mutex_exit(&zone_status_lock); 4015 mutex_exit(&zonehash_lock); 4016 mutex_exit(&cpu_lock); 4017 pool_unlock(); 4018 4019 /* Now call the create callback for this key */ 4020 zsd_apply_all_keys(zsd_apply_create, zone); 4021 4022 /* The callbacks are complete. Mark ZONE_IS_READY */ 4023 mutex_enter(&zone_status_lock); 4024 ASSERT(zone_status_get(zone) == ZONE_IS_INITIALIZED); 4025 zone_status_set(zone, ZONE_IS_READY); 4026 mutex_exit(&zone_status_lock); 4027 4028 /* 4029 * Once we see the zone transition to the ZONE_IS_BOOTING state, 4030 * we launch init, and set the state to running. 4031 */ 4032 zone_status_wait_cpr(zone, ZONE_IS_BOOTING, "zsched"); 4033 4034 if (zone_status_get(zone) == ZONE_IS_BOOTING) { 4035 id_t cid; 4036 4037 /* 4038 * Ok, this is a little complicated. We need to grab the 4039 * zone's pool's scheduling class ID; note that by now, we 4040 * are already bound to a pool if we need to be (zoneadmd 4041 * will have done that to us while we're in the READY 4042 * state). *But* the scheduling class for the zone's 'init' 4043 * must be explicitly passed to newproc, which doesn't 4044 * respect pool bindings. 4045 * 4046 * We hold the pool_lock across the call to newproc() to 4047 * close the obvious race: the pool's scheduling class 4048 * could change before we manage to create the LWP with 4049 * classid 'cid'. 4050 */ 4051 pool_lock(); 4052 if (zone->zone_defaultcid > 0) 4053 cid = zone->zone_defaultcid; 4054 else 4055 cid = pool_get_class(zone->zone_pool); 4056 if (cid == -1) 4057 cid = defaultcid; 4058 4059 /* 4060 * If this fails, zone_boot will ultimately fail. The 4061 * state of the zone will be set to SHUTTING_DOWN-- userland 4062 * will have to tear down the zone, and fail, or try again. 4063 */ 4064 if ((zone->zone_boot_err = newproc(zone_start_init, NULL, cid, 4065 minclsyspri - 1, &ct, 0)) != 0) { 4066 mutex_enter(&zone_status_lock); 4067 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN); 4068 mutex_exit(&zone_status_lock); 4069 } else { 4070 zone->zone_boot_time = gethrestime_sec(); 4071 } 4072 4073 pool_unlock(); 4074 } 4075 4076 /* 4077 * Wait for zone_destroy() to be called. This is what we spend 4078 * most of our life doing. 4079 */ 4080 zone_status_wait_cpr(zone, ZONE_IS_DYING, "zsched"); 4081 4082 if (ct) 4083 /* 4084 * At this point the process contract should be empty. 4085 * (Though if it isn't, it's not the end of the world.) 4086 */ 4087 VERIFY(contract_abandon(ct, curproc, B_TRUE) == 0); 4088 4089 /* 4090 * Allow kcred to be freed when all referring processes 4091 * (including this one) go away. We can't just do this in 4092 * zone_free because we need to wait for the zone_cred_ref to 4093 * drop to 0 before calling zone_free, and the existence of 4094 * zone_kcred will prevent that. Thus, we call crfree here to 4095 * balance the crdup in zone_create. The crhold calls earlier 4096 * in zsched will be dropped when the thread and process exit. 4097 */ 4098 crfree(zone->zone_kcred); 4099 zone->zone_kcred = NULL; 4100 4101 exit(CLD_EXITED, 0); 4102 } 4103 4104 /* 4105 * Helper function to determine if there are any submounts of the 4106 * provided path. Used to make sure the zone doesn't "inherit" any 4107 * mounts from before it is created. 4108 */ 4109 static uint_t 4110 zone_mount_count(const char *rootpath) 4111 { 4112 vfs_t *vfsp; 4113 uint_t count = 0; 4114 size_t rootpathlen = strlen(rootpath); 4115 4116 /* 4117 * Holding zonehash_lock prevents race conditions with 4118 * vfs_list_add()/vfs_list_remove() since we serialize with 4119 * zone_find_by_path(). 4120 */ 4121 ASSERT(MUTEX_HELD(&zonehash_lock)); 4122 /* 4123 * The rootpath must end with a '/' 4124 */ 4125 ASSERT(rootpath[rootpathlen - 1] == '/'); 4126 4127 /* 4128 * This intentionally does not count the rootpath itself if that 4129 * happens to be a mount point. 4130 */ 4131 vfs_list_read_lock(); 4132 vfsp = rootvfs; 4133 do { 4134 if (strncmp(rootpath, refstr_value(vfsp->vfs_mntpt), 4135 rootpathlen) == 0) 4136 count++; 4137 vfsp = vfsp->vfs_next; 4138 } while (vfsp != rootvfs); 4139 vfs_list_unlock(); 4140 return (count); 4141 } 4142 4143 /* 4144 * Helper function to make sure that a zone created on 'rootpath' 4145 * wouldn't end up containing other zones' rootpaths. 4146 */ 4147 static boolean_t 4148 zone_is_nested(const char *rootpath) 4149 { 4150 zone_t *zone; 4151 size_t rootpathlen = strlen(rootpath); 4152 size_t len; 4153 4154 ASSERT(MUTEX_HELD(&zonehash_lock)); 4155 4156 /* 4157 * zone_set_root() appended '/' and '\0' at the end of rootpath 4158 */ 4159 if ((rootpathlen <= 3) && (rootpath[0] == '/') && 4160 (rootpath[1] == '/') && (rootpath[2] == '\0')) 4161 return (B_TRUE); 4162 4163 for (zone = list_head(&zone_active); zone != NULL; 4164 zone = list_next(&zone_active, zone)) { 4165 if (zone == global_zone) 4166 continue; 4167 len = strlen(zone->zone_rootpath); 4168 if (strncmp(rootpath, zone->zone_rootpath, 4169 MIN(rootpathlen, len)) == 0) 4170 return (B_TRUE); 4171 } 4172 return (B_FALSE); 4173 } 4174 4175 static int 4176 zone_set_privset(zone_t *zone, const priv_set_t *zone_privs, 4177 size_t zone_privssz) 4178 { 4179 priv_set_t *privs; 4180 4181 if (zone_privssz < sizeof (priv_set_t)) 4182 return (ENOMEM); 4183 4184 privs = kmem_alloc(sizeof (priv_set_t), KM_SLEEP); 4185 4186 if (copyin(zone_privs, privs, sizeof (priv_set_t))) { 4187 kmem_free(privs, sizeof (priv_set_t)); 4188 return (EFAULT); 4189 } 4190 4191 zone->zone_privset = privs; 4192 return (0); 4193 } 4194 4195 /* 4196 * We make creative use of nvlists to pass in rctls from userland. The list is 4197 * a list of the following structures: 4198 * 4199 * (name = rctl_name, value = nvpair_list_array) 4200 * 4201 * Where each element of the nvpair_list_array is of the form: 4202 * 4203 * [(name = "privilege", value = RCPRIV_PRIVILEGED), 4204 * (name = "limit", value = uint64_t), 4205 * (name = "action", value = (RCTL_LOCAL_NOACTION || RCTL_LOCAL_DENY))] 4206 */ 4207 static int 4208 parse_rctls(caddr_t ubuf, size_t buflen, nvlist_t **nvlp) 4209 { 4210 nvpair_t *nvp = NULL; 4211 nvlist_t *nvl = NULL; 4212 char *kbuf; 4213 int error; 4214 rctl_val_t rv; 4215 4216 *nvlp = NULL; 4217 4218 if (buflen == 0) 4219 return (0); 4220 4221 if ((kbuf = kmem_alloc(buflen, KM_NOSLEEP)) == NULL) 4222 return (ENOMEM); 4223 if (copyin(ubuf, kbuf, buflen)) { 4224 error = EFAULT; 4225 goto out; 4226 } 4227 if (nvlist_unpack(kbuf, buflen, &nvl, KM_SLEEP) != 0) { 4228 /* 4229 * nvl may have been allocated/free'd, but the value set to 4230 * non-NULL, so we reset it here. 4231 */ 4232 nvl = NULL; 4233 error = EINVAL; 4234 goto out; 4235 } 4236 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) { 4237 rctl_dict_entry_t *rde; 4238 rctl_hndl_t hndl; 4239 nvlist_t **nvlarray; 4240 uint_t i, nelem; 4241 char *name; 4242 4243 error = EINVAL; 4244 name = nvpair_name(nvp); 4245 if (strncmp(nvpair_name(nvp), "zone.", sizeof ("zone.") - 1) 4246 != 0 || nvpair_type(nvp) != DATA_TYPE_NVLIST_ARRAY) { 4247 goto out; 4248 } 4249 if ((hndl = rctl_hndl_lookup(name)) == -1) { 4250 goto out; 4251 } 4252 rde = rctl_dict_lookup_hndl(hndl); 4253 error = nvpair_value_nvlist_array(nvp, &nvlarray, &nelem); 4254 ASSERT(error == 0); 4255 for (i = 0; i < nelem; i++) { 4256 if (error = nvlist2rctlval(nvlarray[i], &rv)) 4257 goto out; 4258 } 4259 if (rctl_invalid_value(rde, &rv)) { 4260 error = EINVAL; 4261 goto out; 4262 } 4263 } 4264 error = 0; 4265 *nvlp = nvl; 4266 out: 4267 kmem_free(kbuf, buflen); 4268 if (error && nvl != NULL) 4269 nvlist_free(nvl); 4270 return (error); 4271 } 4272 4273 int 4274 zone_create_error(int er_error, int er_ext, int *er_out) 4275 { 4276 if (er_out != NULL) { 4277 if (copyout(&er_ext, er_out, sizeof (int))) { 4278 return (set_errno(EFAULT)); 4279 } 4280 } 4281 return (set_errno(er_error)); 4282 } 4283 4284 static int 4285 zone_set_label(zone_t *zone, const bslabel_t *lab, uint32_t doi) 4286 { 4287 ts_label_t *tsl; 4288 bslabel_t blab; 4289 4290 /* Get label from user */ 4291 if (copyin(lab, &blab, sizeof (blab)) != 0) 4292 return (EFAULT); 4293 tsl = labelalloc(&blab, doi, KM_NOSLEEP); 4294 if (tsl == NULL) 4295 return (ENOMEM); 4296 4297 zone->zone_slabel = tsl; 4298 return (0); 4299 } 4300 4301 /* 4302 * Parses a comma-separated list of ZFS datasets into a per-zone dictionary. 4303 */ 4304 static int 4305 parse_zfs(zone_t *zone, caddr_t ubuf, size_t buflen) 4306 { 4307 char *kbuf; 4308 char *dataset, *next; 4309 zone_dataset_t *zd; 4310 size_t len; 4311 4312 if (ubuf == NULL || buflen == 0) 4313 return (0); 4314 4315 if ((kbuf = kmem_alloc(buflen, KM_NOSLEEP)) == NULL) 4316 return (ENOMEM); 4317 4318 if (copyin(ubuf, kbuf, buflen) != 0) { 4319 kmem_free(kbuf, buflen); 4320 return (EFAULT); 4321 } 4322 4323 dataset = next = kbuf; 4324 for (;;) { 4325 zd = kmem_alloc(sizeof (zone_dataset_t), KM_SLEEP); 4326 4327 next = strchr(dataset, ','); 4328 4329 if (next == NULL) 4330 len = strlen(dataset); 4331 else 4332 len = next - dataset; 4333 4334 zd->zd_dataset = kmem_alloc(len + 1, KM_SLEEP); 4335 bcopy(dataset, zd->zd_dataset, len); 4336 zd->zd_dataset[len] = '\0'; 4337 4338 list_insert_head(&zone->zone_datasets, zd); 4339 4340 if (next == NULL) 4341 break; 4342 4343 dataset = next + 1; 4344 } 4345 4346 kmem_free(kbuf, buflen); 4347 return (0); 4348 } 4349 4350 /* 4351 * System call to create/initialize a new zone named 'zone_name', rooted 4352 * at 'zone_root', with a zone-wide privilege limit set of 'zone_privs', 4353 * and initialized with the zone-wide rctls described in 'rctlbuf', and 4354 * with labeling set by 'match', 'doi', and 'label'. 4355 * 4356 * If extended error is non-null, we may use it to return more detailed 4357 * error information. 4358 */ 4359 static zoneid_t 4360 zone_create(const char *zone_name, const char *zone_root, 4361 const priv_set_t *zone_privs, size_t zone_privssz, 4362 caddr_t rctlbuf, size_t rctlbufsz, 4363 caddr_t zfsbuf, size_t zfsbufsz, int *extended_error, 4364 int match, uint32_t doi, const bslabel_t *label, 4365 int flags) 4366 { 4367 struct zsched_arg zarg; 4368 nvlist_t *rctls = NULL; 4369 proc_t *pp = curproc; 4370 zone_t *zone, *ztmp; 4371 zoneid_t zoneid, start = GLOBAL_ZONEID; 4372 int error; 4373 int error2 = 0; 4374 char *str; 4375 cred_t *zkcr; 4376 boolean_t insert_label_hash; 4377 4378 if (secpolicy_zone_config(CRED()) != 0) 4379 return (set_errno(EPERM)); 4380 4381 /* can't boot zone from within chroot environment */ 4382 if (PTOU(pp)->u_rdir != NULL && PTOU(pp)->u_rdir != rootdir) 4383 return (zone_create_error(ENOTSUP, ZE_CHROOTED, 4384 extended_error)); 4385 /* 4386 * As the first step of zone creation, we want to allocate a zoneid. 4387 * This allocation is complicated by the fact that netstacks use the 4388 * zoneid to determine their stackid, but netstacks themselves are 4389 * freed asynchronously with respect to zone destruction. This means 4390 * that a netstack reference leak (or in principle, an extraordinarily 4391 * long netstack reference hold) could result in a zoneid being 4392 * allocated that in fact corresponds to a stackid from an active 4393 * (referenced) netstack -- unleashing all sorts of havoc when that 4394 * netstack is actually (re)used. (In the abstract, we might wish a 4395 * zoneid to not be deallocated until its last referencing netstack 4396 * has been released, but netstacks lack a backpointer into their 4397 * referencing zone -- and changing them to have such a pointer would 4398 * be substantial, to put it euphemistically.) To avoid this, we 4399 * detect this condition on allocation: if we have allocated a zoneid 4400 * that corresponds to a netstack that's still in use, we warn about 4401 * it (as it is much more likely to be a reference leak than an actual 4402 * netstack reference), free it, and allocate another. That these 4403 * identifers are allocated out of an ID space assures that we won't 4404 * see the identifier we just allocated. 4405 */ 4406 for (;;) { 4407 zoneid = id_alloc(zoneid_space); 4408 4409 if (!netstack_inuse_by_stackid(zoneid_to_netstackid(zoneid))) 4410 break; 4411 4412 id_free(zoneid_space, zoneid); 4413 4414 if (start == GLOBAL_ZONEID) { 4415 start = zoneid; 4416 } else if (zoneid == start) { 4417 /* 4418 * We have managed to iterate over the entire available 4419 * zoneid space -- there are no identifiers available, 4420 * presumably due to some number of leaked netstack 4421 * references. While it's in principle possible for us 4422 * to continue to try, it seems wiser to give up at 4423 * this point to warn and fail explicitly with a 4424 * distinctive error. 4425 */ 4426 cmn_err(CE_WARN, "zone_create() failed: all available " 4427 "zone IDs have netstacks still in use"); 4428 return (set_errno(ENFILE)); 4429 } 4430 4431 cmn_err(CE_WARN, "unable to reuse zone ID %d; " 4432 "netstack still in use", zoneid); 4433 } 4434 4435 zone = kmem_zalloc(sizeof (zone_t), KM_SLEEP); 4436 zone->zone_id = zoneid; 4437 zone->zone_status = ZONE_IS_UNINITIALIZED; 4438 zone->zone_pool = pool_default; 4439 zone->zone_pool_mod = gethrtime(); 4440 zone->zone_psetid = ZONE_PS_INVAL; 4441 zone->zone_ncpus = 0; 4442 zone->zone_ncpus_online = 0; 4443 zone->zone_restart_init = B_TRUE; 4444 zone->zone_brand = &native_brand; 4445 zone->zone_initname = NULL; 4446 mutex_init(&zone->zone_lock, NULL, MUTEX_DEFAULT, NULL); 4447 mutex_init(&zone->zone_nlwps_lock, NULL, MUTEX_DEFAULT, NULL); 4448 mutex_init(&zone->zone_mem_lock, NULL, MUTEX_DEFAULT, NULL); 4449 cv_init(&zone->zone_cv, NULL, CV_DEFAULT, NULL); 4450 list_create(&zone->zone_ref_list, sizeof (zone_ref_t), 4451 offsetof(zone_ref_t, zref_linkage)); 4452 list_create(&zone->zone_zsd, sizeof (struct zsd_entry), 4453 offsetof(struct zsd_entry, zsd_linkage)); 4454 list_create(&zone->zone_datasets, sizeof (zone_dataset_t), 4455 offsetof(zone_dataset_t, zd_linkage)); 4456 list_create(&zone->zone_dl_list, sizeof (zone_dl_t), 4457 offsetof(zone_dl_t, zdl_linkage)); 4458 rw_init(&zone->zone_mlps.mlpl_rwlock, NULL, RW_DEFAULT, NULL); 4459 rw_init(&zone->zone_mntfs_db_lock, NULL, RW_DEFAULT, NULL); 4460 4461 if (flags & ZCF_NET_EXCL) { 4462 zone->zone_flags |= ZF_NET_EXCL; 4463 } 4464 4465 if ((error = zone_set_name(zone, zone_name)) != 0) { 4466 zone_free(zone); 4467 return (zone_create_error(error, 0, extended_error)); 4468 } 4469 4470 if ((error = zone_set_root(zone, zone_root)) != 0) { 4471 zone_free(zone); 4472 return (zone_create_error(error, 0, extended_error)); 4473 } 4474 if ((error = zone_set_privset(zone, zone_privs, zone_privssz)) != 0) { 4475 zone_free(zone); 4476 return (zone_create_error(error, 0, extended_error)); 4477 } 4478 4479 /* initialize node name to be the same as zone name */ 4480 zone->zone_nodename = kmem_alloc(_SYS_NMLN, KM_SLEEP); 4481 (void) strncpy(zone->zone_nodename, zone->zone_name, _SYS_NMLN); 4482 zone->zone_nodename[_SYS_NMLN - 1] = '\0'; 4483 4484 zone->zone_domain = kmem_alloc(_SYS_NMLN, KM_SLEEP); 4485 zone->zone_domain[0] = '\0'; 4486 zone->zone_hostid = HW_INVALID_HOSTID; 4487 zone->zone_shares = 1; 4488 zone->zone_shmmax = 0; 4489 zone->zone_ipc.ipcq_shmmni = 0; 4490 zone->zone_ipc.ipcq_semmni = 0; 4491 zone->zone_ipc.ipcq_msgmni = 0; 4492 zone->zone_bootargs = NULL; 4493 zone->zone_fs_allowed = NULL; 4494 zone->zone_initname = 4495 kmem_alloc(strlen(zone_default_initname) + 1, KM_SLEEP); 4496 (void) strcpy(zone->zone_initname, zone_default_initname); 4497 zone->zone_nlwps = 0; 4498 zone->zone_nlwps_ctl = INT_MAX; 4499 zone->zone_nprocs = 0; 4500 zone->zone_nprocs_ctl = INT_MAX; 4501 zone->zone_locked_mem = 0; 4502 zone->zone_locked_mem_ctl = UINT64_MAX; 4503 zone->zone_max_swap = 0; 4504 zone->zone_max_swap_ctl = UINT64_MAX; 4505 zone->zone_max_lofi = 0; 4506 zone->zone_max_lofi_ctl = UINT64_MAX; 4507 zone0.zone_lockedmem_kstat = NULL; 4508 zone0.zone_swapresv_kstat = NULL; 4509 4510 /* 4511 * Zsched initializes the rctls. 4512 */ 4513 zone->zone_rctls = NULL; 4514 4515 if ((error = parse_rctls(rctlbuf, rctlbufsz, &rctls)) != 0) { 4516 zone_free(zone); 4517 return (zone_create_error(error, 0, extended_error)); 4518 } 4519 4520 if ((error = parse_zfs(zone, zfsbuf, zfsbufsz)) != 0) { 4521 zone_free(zone); 4522 return (set_errno(error)); 4523 } 4524 4525 /* 4526 * Read in the trusted system parameters: 4527 * match flag and sensitivity label. 4528 */ 4529 zone->zone_match = match; 4530 if (is_system_labeled() && !(zone->zone_flags & ZF_IS_SCRATCH)) { 4531 /* Fail if requested to set doi to anything but system's doi */ 4532 if (doi != 0 && doi != default_doi) { 4533 zone_free(zone); 4534 return (set_errno(EINVAL)); 4535 } 4536 /* Always apply system's doi to the zone */ 4537 error = zone_set_label(zone, label, default_doi); 4538 if (error != 0) { 4539 zone_free(zone); 4540 return (set_errno(error)); 4541 } 4542 insert_label_hash = B_TRUE; 4543 } else { 4544 /* all zones get an admin_low label if system is not labeled */ 4545 zone->zone_slabel = l_admin_low; 4546 label_hold(l_admin_low); 4547 insert_label_hash = B_FALSE; 4548 } 4549 4550 /* 4551 * Stop all lwps since that's what normally happens as part of fork(). 4552 * This needs to happen before we grab any locks to avoid deadlock 4553 * (another lwp in the process could be waiting for the held lock). 4554 */ 4555 if (curthread != pp->p_agenttp && !holdlwps(SHOLDFORK)) { 4556 zone_free(zone); 4557 nvlist_free(rctls); 4558 return (zone_create_error(error, 0, extended_error)); 4559 } 4560 4561 if (block_mounts(zone) == 0) { 4562 mutex_enter(&pp->p_lock); 4563 if (curthread != pp->p_agenttp) 4564 continuelwps(pp); 4565 mutex_exit(&pp->p_lock); 4566 zone_free(zone); 4567 nvlist_free(rctls); 4568 return (zone_create_error(error, 0, extended_error)); 4569 } 4570 4571 /* 4572 * Set up credential for kernel access. After this, any errors 4573 * should go through the dance in errout rather than calling 4574 * zone_free directly. 4575 */ 4576 zone->zone_kcred = crdup(kcred); 4577 crsetzone(zone->zone_kcred, zone); 4578 priv_intersect(zone->zone_privset, &CR_PPRIV(zone->zone_kcred)); 4579 priv_intersect(zone->zone_privset, &CR_EPRIV(zone->zone_kcred)); 4580 priv_intersect(zone->zone_privset, &CR_IPRIV(zone->zone_kcred)); 4581 priv_intersect(zone->zone_privset, &CR_LPRIV(zone->zone_kcred)); 4582 4583 mutex_enter(&zonehash_lock); 4584 /* 4585 * Make sure zone doesn't already exist. 4586 * 4587 * If the system and zone are labeled, 4588 * make sure no other zone exists that has the same label. 4589 */ 4590 if ((ztmp = zone_find_all_by_name(zone->zone_name)) != NULL || 4591 (insert_label_hash && 4592 (ztmp = zone_find_all_by_label(zone->zone_slabel)) != NULL)) { 4593 zone_status_t status; 4594 4595 status = zone_status_get(ztmp); 4596 if (status == ZONE_IS_READY || status == ZONE_IS_RUNNING) 4597 error = EEXIST; 4598 else 4599 error = EBUSY; 4600 4601 if (insert_label_hash) 4602 error2 = ZE_LABELINUSE; 4603 4604 goto errout; 4605 } 4606 4607 /* 4608 * Don't allow zone creations which would cause one zone's rootpath to 4609 * be accessible from that of another (non-global) zone. 4610 */ 4611 if (zone_is_nested(zone->zone_rootpath)) { 4612 error = EBUSY; 4613 goto errout; 4614 } 4615 4616 ASSERT(zonecount != 0); /* check for leaks */ 4617 if (zonecount + 1 > maxzones) { 4618 error = ENOMEM; 4619 goto errout; 4620 } 4621 4622 if (zone_mount_count(zone->zone_rootpath) != 0) { 4623 error = EBUSY; 4624 error2 = ZE_AREMOUNTS; 4625 goto errout; 4626 } 4627 4628 /* 4629 * Zone is still incomplete, but we need to drop all locks while 4630 * zsched() initializes this zone's kernel process. We 4631 * optimistically add the zone to the hashtable and associated 4632 * lists so a parallel zone_create() doesn't try to create the 4633 * same zone. 4634 */ 4635 zonecount++; 4636 (void) mod_hash_insert(zonehashbyid, 4637 (mod_hash_key_t)(uintptr_t)zone->zone_id, 4638 (mod_hash_val_t)(uintptr_t)zone); 4639 str = kmem_alloc(strlen(zone->zone_name) + 1, KM_SLEEP); 4640 (void) strcpy(str, zone->zone_name); 4641 (void) mod_hash_insert(zonehashbyname, (mod_hash_key_t)str, 4642 (mod_hash_val_t)(uintptr_t)zone); 4643 if (insert_label_hash) { 4644 (void) mod_hash_insert(zonehashbylabel, 4645 (mod_hash_key_t)zone->zone_slabel, (mod_hash_val_t)zone); 4646 zone->zone_flags |= ZF_HASHED_LABEL; 4647 } 4648 4649 /* 4650 * Insert into active list. At this point there are no 'hold's 4651 * on the zone, but everyone else knows not to use it, so we can 4652 * continue to use it. zsched() will do a zone_hold() if the 4653 * newproc() is successful. 4654 */ 4655 list_insert_tail(&zone_active, zone); 4656 mutex_exit(&zonehash_lock); 4657 4658 zarg.zone = zone; 4659 zarg.nvlist = rctls; 4660 /* 4661 * The process, task, and project rctls are probably wrong; 4662 * we need an interface to get the default values of all rctls, 4663 * and initialize zsched appropriately. I'm not sure that that 4664 * makes much of a difference, though. 4665 */ 4666 error = newproc(zsched, (void *)&zarg, syscid, minclsyspri, NULL, 0); 4667 if (error != 0) { 4668 /* 4669 * We need to undo all globally visible state. 4670 */ 4671 mutex_enter(&zonehash_lock); 4672 list_remove(&zone_active, zone); 4673 if (zone->zone_flags & ZF_HASHED_LABEL) { 4674 ASSERT(zone->zone_slabel != NULL); 4675 (void) mod_hash_destroy(zonehashbylabel, 4676 (mod_hash_key_t)zone->zone_slabel); 4677 } 4678 (void) mod_hash_destroy(zonehashbyname, 4679 (mod_hash_key_t)(uintptr_t)zone->zone_name); 4680 (void) mod_hash_destroy(zonehashbyid, 4681 (mod_hash_key_t)(uintptr_t)zone->zone_id); 4682 ASSERT(zonecount > 1); 4683 zonecount--; 4684 goto errout; 4685 } 4686 4687 /* 4688 * Zone creation can't fail from now on. 4689 */ 4690 4691 /* 4692 * Create zone kstats 4693 */ 4694 zone_kstat_create(zone); 4695 4696 /* 4697 * Let the other lwps continue. 4698 */ 4699 mutex_enter(&pp->p_lock); 4700 if (curthread != pp->p_agenttp) 4701 continuelwps(pp); 4702 mutex_exit(&pp->p_lock); 4703 4704 /* 4705 * Wait for zsched to finish initializing the zone. 4706 */ 4707 zone_status_wait(zone, ZONE_IS_READY); 4708 /* 4709 * The zone is fully visible, so we can let mounts progress. 4710 */ 4711 resume_mounts(zone); 4712 nvlist_free(rctls); 4713 4714 return (zoneid); 4715 4716 errout: 4717 mutex_exit(&zonehash_lock); 4718 /* 4719 * Let the other lwps continue. 4720 */ 4721 mutex_enter(&pp->p_lock); 4722 if (curthread != pp->p_agenttp) 4723 continuelwps(pp); 4724 mutex_exit(&pp->p_lock); 4725 4726 resume_mounts(zone); 4727 nvlist_free(rctls); 4728 /* 4729 * There is currently one reference to the zone, a cred_ref from 4730 * zone_kcred. To free the zone, we call crfree, which will call 4731 * zone_cred_rele, which will call zone_free. 4732 */ 4733 ASSERT(zone->zone_cred_ref == 1); 4734 ASSERT(zone->zone_kcred->cr_ref == 1); 4735 ASSERT(zone->zone_ref == 0); 4736 zkcr = zone->zone_kcred; 4737 zone->zone_kcred = NULL; 4738 crfree(zkcr); /* triggers call to zone_free */ 4739 return (zone_create_error(error, error2, extended_error)); 4740 } 4741 4742 /* 4743 * Cause the zone to boot. This is pretty simple, since we let zoneadmd do 4744 * the heavy lifting. initname is the path to the program to launch 4745 * at the "top" of the zone; if this is NULL, we use the system default, 4746 * which is stored at zone_default_initname. 4747 */ 4748 static int 4749 zone_boot(zoneid_t zoneid) 4750 { 4751 int err; 4752 zone_t *zone; 4753 4754 if (secpolicy_zone_config(CRED()) != 0) 4755 return (set_errno(EPERM)); 4756 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID) 4757 return (set_errno(EINVAL)); 4758 4759 mutex_enter(&zonehash_lock); 4760 /* 4761 * Look for zone under hash lock to prevent races with calls to 4762 * zone_shutdown, zone_destroy, etc. 4763 */ 4764 if ((zone = zone_find_all_by_id(zoneid)) == NULL) { 4765 mutex_exit(&zonehash_lock); 4766 return (set_errno(EINVAL)); 4767 } 4768 4769 mutex_enter(&zone_status_lock); 4770 if (zone_status_get(zone) != ZONE_IS_READY) { 4771 mutex_exit(&zone_status_lock); 4772 mutex_exit(&zonehash_lock); 4773 return (set_errno(EINVAL)); 4774 } 4775 zone_status_set(zone, ZONE_IS_BOOTING); 4776 mutex_exit(&zone_status_lock); 4777 4778 zone_hold(zone); /* so we can use the zone_t later */ 4779 mutex_exit(&zonehash_lock); 4780 4781 if (zone_status_wait_sig(zone, ZONE_IS_RUNNING) == 0) { 4782 zone_rele(zone); 4783 return (set_errno(EINTR)); 4784 } 4785 4786 /* 4787 * Boot (starting init) might have failed, in which case the zone 4788 * will go to the SHUTTING_DOWN state; an appropriate errno will 4789 * be placed in zone->zone_boot_err, and so we return that. 4790 */ 4791 err = zone->zone_boot_err; 4792 zone_rele(zone); 4793 return (err ? set_errno(err) : 0); 4794 } 4795 4796 /* 4797 * Kills all user processes in the zone, waiting for them all to exit 4798 * before returning. 4799 */ 4800 static int 4801 zone_empty(zone_t *zone) 4802 { 4803 int waitstatus; 4804 4805 /* 4806 * We need to drop zonehash_lock before killing all 4807 * processes, otherwise we'll deadlock with zone_find_* 4808 * which can be called from the exit path. 4809 */ 4810 ASSERT(MUTEX_NOT_HELD(&zonehash_lock)); 4811 while ((waitstatus = zone_status_timedwait_sig(zone, 4812 ddi_get_lbolt() + hz, ZONE_IS_EMPTY)) == -1) { 4813 killall(zone->zone_id); 4814 } 4815 /* 4816 * return EINTR if we were signaled 4817 */ 4818 if (waitstatus == 0) 4819 return (EINTR); 4820 return (0); 4821 } 4822 4823 /* 4824 * This function implements the policy for zone visibility. 4825 * 4826 * In standard Solaris, a non-global zone can only see itself. 4827 * 4828 * In Trusted Extensions, a labeled zone can lookup any zone whose label 4829 * it dominates. For this test, the label of the global zone is treated as 4830 * admin_high so it is special-cased instead of being checked for dominance. 4831 * 4832 * Returns true if zone attributes are viewable, false otherwise. 4833 */ 4834 static boolean_t 4835 zone_list_access(zone_t *zone) 4836 { 4837 4838 if (curproc->p_zone == global_zone || 4839 curproc->p_zone == zone) { 4840 return (B_TRUE); 4841 } else if (is_system_labeled() && !(zone->zone_flags & ZF_IS_SCRATCH)) { 4842 bslabel_t *curproc_label; 4843 bslabel_t *zone_label; 4844 4845 curproc_label = label2bslabel(curproc->p_zone->zone_slabel); 4846 zone_label = label2bslabel(zone->zone_slabel); 4847 4848 if (zone->zone_id != GLOBAL_ZONEID && 4849 bldominates(curproc_label, zone_label)) { 4850 return (B_TRUE); 4851 } else { 4852 return (B_FALSE); 4853 } 4854 } else { 4855 return (B_FALSE); 4856 } 4857 } 4858 4859 /* 4860 * Systemcall to start the zone's halt sequence. By the time this 4861 * function successfully returns, all user processes and kernel threads 4862 * executing in it will have exited, ZSD shutdown callbacks executed, 4863 * and the zone status set to ZONE_IS_DOWN. 4864 * 4865 * It is possible that the call will interrupt itself if the caller is the 4866 * parent of any process running in the zone, and doesn't have SIGCHLD blocked. 4867 */ 4868 static int 4869 zone_shutdown(zoneid_t zoneid) 4870 { 4871 int error; 4872 zone_t *zone; 4873 zone_status_t status; 4874 4875 if (secpolicy_zone_config(CRED()) != 0) 4876 return (set_errno(EPERM)); 4877 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID) 4878 return (set_errno(EINVAL)); 4879 4880 mutex_enter(&zonehash_lock); 4881 /* 4882 * Look for zone under hash lock to prevent races with other 4883 * calls to zone_shutdown and zone_destroy. 4884 */ 4885 if ((zone = zone_find_all_by_id(zoneid)) == NULL) { 4886 mutex_exit(&zonehash_lock); 4887 return (set_errno(EINVAL)); 4888 } 4889 4890 /* 4891 * We have to drop zonehash_lock before calling block_mounts. 4892 * Hold the zone so we can continue to use the zone_t. 4893 */ 4894 zone_hold(zone); 4895 mutex_exit(&zonehash_lock); 4896 4897 /* 4898 * Block mounts so that VFS_MOUNT() can get an accurate view of 4899 * the zone's status with regards to ZONE_IS_SHUTTING down. 4900 * 4901 * e.g. NFS can fail the mount if it determines that the zone 4902 * has already begun the shutdown sequence. 4903 * 4904 */ 4905 if (block_mounts(zone) == 0) { 4906 zone_rele(zone); 4907 return (set_errno(EINTR)); 4908 } 4909 4910 mutex_enter(&zonehash_lock); 4911 mutex_enter(&zone_status_lock); 4912 status = zone_status_get(zone); 4913 /* 4914 * Fail if the zone isn't fully initialized yet. 4915 */ 4916 if (status < ZONE_IS_READY) { 4917 mutex_exit(&zone_status_lock); 4918 mutex_exit(&zonehash_lock); 4919 resume_mounts(zone); 4920 zone_rele(zone); 4921 return (set_errno(EINVAL)); 4922 } 4923 /* 4924 * If conditions required for zone_shutdown() to return have been met, 4925 * return success. 4926 */ 4927 if (status >= ZONE_IS_DOWN) { 4928 mutex_exit(&zone_status_lock); 4929 mutex_exit(&zonehash_lock); 4930 resume_mounts(zone); 4931 zone_rele(zone); 4932 return (0); 4933 } 4934 /* 4935 * If zone_shutdown() hasn't been called before, go through the motions. 4936 * If it has, there's nothing to do but wait for the kernel threads to 4937 * drain. 4938 */ 4939 if (status < ZONE_IS_EMPTY) { 4940 uint_t ntasks; 4941 4942 mutex_enter(&zone->zone_lock); 4943 if ((ntasks = zone->zone_ntasks) != 1) { 4944 /* 4945 * There's still stuff running. 4946 */ 4947 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN); 4948 } 4949 mutex_exit(&zone->zone_lock); 4950 if (ntasks == 1) { 4951 /* 4952 * The only way to create another task is through 4953 * zone_enter(), which will block until we drop 4954 * zonehash_lock. The zone is empty. 4955 */ 4956 if (zone->zone_kthreads == NULL) { 4957 /* 4958 * Skip ahead to ZONE_IS_DOWN 4959 */ 4960 zone_status_set(zone, ZONE_IS_DOWN); 4961 } else { 4962 zone_status_set(zone, ZONE_IS_EMPTY); 4963 } 4964 } 4965 } 4966 mutex_exit(&zone_status_lock); 4967 mutex_exit(&zonehash_lock); 4968 resume_mounts(zone); 4969 4970 if (error = zone_empty(zone)) { 4971 zone_rele(zone); 4972 return (set_errno(error)); 4973 } 4974 /* 4975 * After the zone status goes to ZONE_IS_DOWN this zone will no 4976 * longer be notified of changes to the pools configuration, so 4977 * in order to not end up with a stale pool pointer, we point 4978 * ourselves at the default pool and remove all resource 4979 * visibility. This is especially important as the zone_t may 4980 * languish on the deathrow for a very long time waiting for 4981 * cred's to drain out. 4982 * 4983 * This rebinding of the zone can happen multiple times 4984 * (presumably due to interrupted or parallel systemcalls) 4985 * without any adverse effects. 4986 */ 4987 if (pool_lock_intr() != 0) { 4988 zone_rele(zone); 4989 return (set_errno(EINTR)); 4990 } 4991 if (pool_state == POOL_ENABLED) { 4992 mutex_enter(&cpu_lock); 4993 zone_pool_set(zone, pool_default); 4994 /* 4995 * The zone no longer needs to be able to see any cpus. 4996 */ 4997 zone_pset_set(zone, ZONE_PS_INVAL); 4998 mutex_exit(&cpu_lock); 4999 } 5000 pool_unlock(); 5001 5002 /* 5003 * ZSD shutdown callbacks can be executed multiple times, hence 5004 * it is safe to not be holding any locks across this call. 5005 */ 5006 zone_zsd_callbacks(zone, ZSD_SHUTDOWN); 5007 5008 mutex_enter(&zone_status_lock); 5009 if (zone->zone_kthreads == NULL && zone_status_get(zone) < ZONE_IS_DOWN) 5010 zone_status_set(zone, ZONE_IS_DOWN); 5011 mutex_exit(&zone_status_lock); 5012 5013 /* 5014 * Wait for kernel threads to drain. 5015 */ 5016 if (!zone_status_wait_sig(zone, ZONE_IS_DOWN)) { 5017 zone_rele(zone); 5018 return (set_errno(EINTR)); 5019 } 5020 5021 /* 5022 * Zone can be become down/destroyable even if the above wait 5023 * returns EINTR, so any code added here may never execute. 5024 * (i.e. don't add code here) 5025 */ 5026 5027 zone_rele(zone); 5028 return (0); 5029 } 5030 5031 /* 5032 * Log the specified zone's reference counts. The caller should not be 5033 * holding the zone's zone_lock. 5034 */ 5035 static void 5036 zone_log_refcounts(zone_t *zone) 5037 { 5038 char *buffer; 5039 char *buffer_position; 5040 uint32_t buffer_size; 5041 uint32_t index; 5042 uint_t ref; 5043 uint_t cred_ref; 5044 5045 /* 5046 * Construct a string representing the subsystem-specific reference 5047 * counts. The counts are printed in ascending order by index into the 5048 * zone_t::zone_subsys_ref array. The list will be surrounded by 5049 * square brackets [] and will only contain nonzero reference counts. 5050 * 5051 * The buffer will hold two square bracket characters plus ten digits, 5052 * one colon, one space, one comma, and some characters for a 5053 * subsystem name per subsystem-specific reference count. (Unsigned 32- 5054 * bit integers have at most ten decimal digits.) The last 5055 * reference count's comma is replaced by the closing square 5056 * bracket and a NULL character to terminate the string. 5057 * 5058 * NOTE: We have to grab the zone's zone_lock to create a consistent 5059 * snapshot of the zone's reference counters. 5060 * 5061 * First, figure out how much space the string buffer will need. 5062 * The buffer's size is stored in buffer_size. 5063 */ 5064 buffer_size = 2; /* for the square brackets */ 5065 mutex_enter(&zone->zone_lock); 5066 zone->zone_flags |= ZF_REFCOUNTS_LOGGED; 5067 ref = zone->zone_ref; 5068 cred_ref = zone->zone_cred_ref; 5069 for (index = 0; index < ZONE_REF_NUM_SUBSYS; ++index) 5070 if (zone->zone_subsys_ref[index] != 0) 5071 buffer_size += strlen(zone_ref_subsys_names[index]) + 5072 13; 5073 if (buffer_size == 2) { 5074 /* 5075 * No subsystems had nonzero reference counts. Don't bother 5076 * with allocating a buffer; just log the general-purpose and 5077 * credential reference counts. 5078 */ 5079 mutex_exit(&zone->zone_lock); 5080 (void) strlog(0, 0, 1, SL_CONSOLE | SL_NOTE, 5081 "Zone '%s' (ID: %d) is shutting down, but %u zone " 5082 "references and %u credential references are still extant", 5083 zone->zone_name, zone->zone_id, ref, cred_ref); 5084 return; 5085 } 5086 5087 /* 5088 * buffer_size contains the exact number of characters that the 5089 * buffer will need. Allocate the buffer and fill it with nonzero 5090 * subsystem-specific reference counts. Surround the results with 5091 * square brackets afterwards. 5092 */ 5093 buffer = kmem_alloc(buffer_size, KM_SLEEP); 5094 buffer_position = &buffer[1]; 5095 for (index = 0; index < ZONE_REF_NUM_SUBSYS; ++index) { 5096 /* 5097 * NOTE: The DDI's version of sprintf() returns a pointer to 5098 * the modified buffer rather than the number of bytes written 5099 * (as in snprintf(3C)). This is unfortunate and annoying. 5100 * Therefore, we'll use snprintf() with INT_MAX to get the 5101 * number of bytes written. Using INT_MAX is safe because 5102 * the buffer is perfectly sized for the data: we'll never 5103 * overrun the buffer. 5104 */ 5105 if (zone->zone_subsys_ref[index] != 0) 5106 buffer_position += snprintf(buffer_position, INT_MAX, 5107 "%s: %u,", zone_ref_subsys_names[index], 5108 zone->zone_subsys_ref[index]); 5109 } 5110 mutex_exit(&zone->zone_lock); 5111 buffer[0] = '['; 5112 ASSERT((uintptr_t)(buffer_position - buffer) < buffer_size); 5113 ASSERT(buffer_position[0] == '\0' && buffer_position[-1] == ','); 5114 buffer_position[-1] = ']'; 5115 5116 /* 5117 * Log the reference counts and free the message buffer. 5118 */ 5119 (void) strlog(0, 0, 1, SL_CONSOLE | SL_NOTE, 5120 "Zone '%s' (ID: %d) is shutting down, but %u zone references and " 5121 "%u credential references are still extant %s", zone->zone_name, 5122 zone->zone_id, ref, cred_ref, buffer); 5123 kmem_free(buffer, buffer_size); 5124 } 5125 5126 /* 5127 * Systemcall entry point to finalize the zone halt process. The caller 5128 * must have already successfully called zone_shutdown(). 5129 * 5130 * Upon successful completion, the zone will have been fully destroyed: 5131 * zsched will have exited, destructor callbacks executed, and the zone 5132 * removed from the list of active zones. 5133 */ 5134 static int 5135 zone_destroy(zoneid_t zoneid) 5136 { 5137 uint64_t uniqid; 5138 zone_t *zone; 5139 zone_status_t status; 5140 clock_t wait_time; 5141 boolean_t log_refcounts; 5142 5143 if (secpolicy_zone_config(CRED()) != 0) 5144 return (set_errno(EPERM)); 5145 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID) 5146 return (set_errno(EINVAL)); 5147 5148 mutex_enter(&zonehash_lock); 5149 /* 5150 * Look for zone under hash lock to prevent races with other 5151 * calls to zone_destroy. 5152 */ 5153 if ((zone = zone_find_all_by_id(zoneid)) == NULL) { 5154 mutex_exit(&zonehash_lock); 5155 return (set_errno(EINVAL)); 5156 } 5157 5158 if (zone_mount_count(zone->zone_rootpath) != 0) { 5159 mutex_exit(&zonehash_lock); 5160 return (set_errno(EBUSY)); 5161 } 5162 mutex_enter(&zone_status_lock); 5163 status = zone_status_get(zone); 5164 if (status < ZONE_IS_DOWN) { 5165 mutex_exit(&zone_status_lock); 5166 mutex_exit(&zonehash_lock); 5167 return (set_errno(EBUSY)); 5168 } else if (status == ZONE_IS_DOWN) { 5169 zone_status_set(zone, ZONE_IS_DYING); /* Tell zsched to exit */ 5170 } 5171 mutex_exit(&zone_status_lock); 5172 zone_hold(zone); 5173 mutex_exit(&zonehash_lock); 5174 5175 /* 5176 * wait for zsched to exit 5177 */ 5178 zone_status_wait(zone, ZONE_IS_DEAD); 5179 zone_zsd_callbacks(zone, ZSD_DESTROY); 5180 zone->zone_netstack = NULL; 5181 uniqid = zone->zone_uniqid; 5182 zone_rele(zone); 5183 zone = NULL; /* potentially free'd */ 5184 5185 log_refcounts = B_FALSE; 5186 wait_time = SEC_TO_TICK(ZONE_DESTROY_TIMEOUT_SECS); 5187 mutex_enter(&zonehash_lock); 5188 for (; /* ever */; ) { 5189 boolean_t unref; 5190 boolean_t refs_have_been_logged; 5191 5192 if ((zone = zone_find_all_by_id(zoneid)) == NULL || 5193 zone->zone_uniqid != uniqid) { 5194 /* 5195 * The zone has gone away. Necessary conditions 5196 * are met, so we return success. 5197 */ 5198 mutex_exit(&zonehash_lock); 5199 return (0); 5200 } 5201 mutex_enter(&zone->zone_lock); 5202 unref = ZONE_IS_UNREF(zone); 5203 refs_have_been_logged = (zone->zone_flags & 5204 ZF_REFCOUNTS_LOGGED); 5205 mutex_exit(&zone->zone_lock); 5206 if (unref) { 5207 /* 5208 * There is only one reference to the zone -- that 5209 * added when the zone was added to the hashtables -- 5210 * and things will remain this way until we drop 5211 * zonehash_lock... we can go ahead and cleanup the 5212 * zone. 5213 */ 5214 break; 5215 } 5216 5217 /* 5218 * Wait for zone_rele_common() or zone_cred_rele() to signal 5219 * zone_destroy_cv. zone_destroy_cv is signaled only when 5220 * some zone's general-purpose reference count reaches one. 5221 * If ZONE_DESTROY_TIMEOUT_SECS seconds elapse while waiting 5222 * on zone_destroy_cv, then log the zone's reference counts and 5223 * continue to wait for zone_rele() and zone_cred_rele(). 5224 */ 5225 if (!refs_have_been_logged) { 5226 if (!log_refcounts) { 5227 /* 5228 * This thread hasn't timed out waiting on 5229 * zone_destroy_cv yet. Wait wait_time clock 5230 * ticks (initially ZONE_DESTROY_TIMEOUT_SECS 5231 * seconds) for the zone's references to clear. 5232 */ 5233 ASSERT(wait_time > 0); 5234 wait_time = cv_reltimedwait_sig( 5235 &zone_destroy_cv, &zonehash_lock, wait_time, 5236 TR_SEC); 5237 if (wait_time > 0) { 5238 /* 5239 * A thread in zone_rele() or 5240 * zone_cred_rele() signaled 5241 * zone_destroy_cv before this thread's 5242 * wait timed out. The zone might have 5243 * only one reference left; find out! 5244 */ 5245 continue; 5246 } else if (wait_time == 0) { 5247 /* The thread's process was signaled. */ 5248 mutex_exit(&zonehash_lock); 5249 return (set_errno(EINTR)); 5250 } 5251 5252 /* 5253 * The thread timed out while waiting on 5254 * zone_destroy_cv. Even though the thread 5255 * timed out, it has to check whether another 5256 * thread woke up from zone_destroy_cv and 5257 * destroyed the zone. 5258 * 5259 * If the zone still exists and has more than 5260 * one unreleased general-purpose reference, 5261 * then log the zone's reference counts. 5262 */ 5263 log_refcounts = B_TRUE; 5264 continue; 5265 } 5266 5267 /* 5268 * The thread already timed out on zone_destroy_cv while 5269 * waiting for subsystems to release the zone's last 5270 * general-purpose references. Log the zone's reference 5271 * counts and wait indefinitely on zone_destroy_cv. 5272 */ 5273 zone_log_refcounts(zone); 5274 } 5275 if (cv_wait_sig(&zone_destroy_cv, &zonehash_lock) == 0) { 5276 /* The thread's process was signaled. */ 5277 mutex_exit(&zonehash_lock); 5278 return (set_errno(EINTR)); 5279 } 5280 } 5281 5282 /* 5283 * Remove CPU cap for this zone now since we're not going to 5284 * fail below this point. 5285 */ 5286 cpucaps_zone_remove(zone); 5287 5288 /* Get rid of the zone's kstats */ 5289 zone_kstat_delete(zone); 5290 5291 /* remove the pfexecd doors */ 5292 if (zone->zone_pfexecd != NULL) { 5293 klpd_freelist(&zone->zone_pfexecd); 5294 zone->zone_pfexecd = NULL; 5295 } 5296 5297 /* free brand specific data */ 5298 if (ZONE_IS_BRANDED(zone)) 5299 ZBROP(zone)->b_free_brand_data(zone); 5300 5301 /* Say goodbye to brand framework. */ 5302 brand_unregister_zone(zone->zone_brand); 5303 5304 /* 5305 * It is now safe to let the zone be recreated; remove it from the 5306 * lists. The memory will not be freed until the last cred 5307 * reference goes away. 5308 */ 5309 ASSERT(zonecount > 1); /* must be > 1; can't destroy global zone */ 5310 zonecount--; 5311 /* remove from active list and hash tables */ 5312 list_remove(&zone_active, zone); 5313 (void) mod_hash_destroy(zonehashbyname, 5314 (mod_hash_key_t)zone->zone_name); 5315 (void) mod_hash_destroy(zonehashbyid, 5316 (mod_hash_key_t)(uintptr_t)zone->zone_id); 5317 if (zone->zone_flags & ZF_HASHED_LABEL) 5318 (void) mod_hash_destroy(zonehashbylabel, 5319 (mod_hash_key_t)zone->zone_slabel); 5320 mutex_exit(&zonehash_lock); 5321 5322 /* 5323 * Release the root vnode; we're not using it anymore. Nor should any 5324 * other thread that might access it exist. 5325 */ 5326 if (zone->zone_rootvp != NULL) { 5327 VN_RELE(zone->zone_rootvp); 5328 zone->zone_rootvp = NULL; 5329 } 5330 5331 /* add to deathrow list */ 5332 mutex_enter(&zone_deathrow_lock); 5333 list_insert_tail(&zone_deathrow, zone); 5334 mutex_exit(&zone_deathrow_lock); 5335 5336 /* 5337 * Drop last reference (which was added by zsched()), this will 5338 * free the zone unless there are outstanding cred references. 5339 */ 5340 zone_rele(zone); 5341 return (0); 5342 } 5343 5344 /* 5345 * Systemcall entry point for zone_getattr(2). 5346 */ 5347 static ssize_t 5348 zone_getattr(zoneid_t zoneid, int attr, void *buf, size_t bufsize) 5349 { 5350 size_t size; 5351 int error = 0, err; 5352 zone_t *zone; 5353 char *zonepath; 5354 char *outstr; 5355 zone_status_t zone_status; 5356 pid_t initpid; 5357 boolean_t global = (curzone == global_zone); 5358 boolean_t inzone = (curzone->zone_id == zoneid); 5359 ushort_t flags; 5360 zone_net_data_t *zbuf; 5361 5362 mutex_enter(&zonehash_lock); 5363 if ((zone = zone_find_all_by_id(zoneid)) == NULL) { 5364 mutex_exit(&zonehash_lock); 5365 return (set_errno(EINVAL)); 5366 } 5367 zone_status = zone_status_get(zone); 5368 if (zone_status < ZONE_IS_INITIALIZED) { 5369 mutex_exit(&zonehash_lock); 5370 return (set_errno(EINVAL)); 5371 } 5372 zone_hold(zone); 5373 mutex_exit(&zonehash_lock); 5374 5375 /* 5376 * If not in the global zone, don't show information about other zones, 5377 * unless the system is labeled and the local zone's label dominates 5378 * the other zone. 5379 */ 5380 if (!zone_list_access(zone)) { 5381 zone_rele(zone); 5382 return (set_errno(EINVAL)); 5383 } 5384 5385 switch (attr) { 5386 case ZONE_ATTR_ROOT: 5387 if (global) { 5388 /* 5389 * Copy the path to trim the trailing "/" (except for 5390 * the global zone). 5391 */ 5392 if (zone != global_zone) 5393 size = zone->zone_rootpathlen - 1; 5394 else 5395 size = zone->zone_rootpathlen; 5396 zonepath = kmem_alloc(size, KM_SLEEP); 5397 bcopy(zone->zone_rootpath, zonepath, size); 5398 zonepath[size - 1] = '\0'; 5399 } else { 5400 if (inzone || !is_system_labeled()) { 5401 /* 5402 * Caller is not in the global zone. 5403 * if the query is on the current zone 5404 * or the system is not labeled, 5405 * just return faked-up path for current zone. 5406 */ 5407 zonepath = "/"; 5408 size = 2; 5409 } else { 5410 /* 5411 * Return related path for current zone. 5412 */ 5413 int prefix_len = strlen(zone_prefix); 5414 int zname_len = strlen(zone->zone_name); 5415 5416 size = prefix_len + zname_len + 1; 5417 zonepath = kmem_alloc(size, KM_SLEEP); 5418 bcopy(zone_prefix, zonepath, prefix_len); 5419 bcopy(zone->zone_name, zonepath + 5420 prefix_len, zname_len); 5421 zonepath[size - 1] = '\0'; 5422 } 5423 } 5424 if (bufsize > size) 5425 bufsize = size; 5426 if (buf != NULL) { 5427 err = copyoutstr(zonepath, buf, bufsize, NULL); 5428 if (err != 0 && err != ENAMETOOLONG) 5429 error = EFAULT; 5430 } 5431 if (global || (is_system_labeled() && !inzone)) 5432 kmem_free(zonepath, size); 5433 break; 5434 5435 case ZONE_ATTR_NAME: 5436 size = strlen(zone->zone_name) + 1; 5437 if (bufsize > size) 5438 bufsize = size; 5439 if (buf != NULL) { 5440 err = copyoutstr(zone->zone_name, buf, bufsize, NULL); 5441 if (err != 0 && err != ENAMETOOLONG) 5442 error = EFAULT; 5443 } 5444 break; 5445 5446 case ZONE_ATTR_STATUS: 5447 /* 5448 * Since we're not holding zonehash_lock, the zone status 5449 * may be anything; leave it up to userland to sort it out. 5450 */ 5451 size = sizeof (zone_status); 5452 if (bufsize > size) 5453 bufsize = size; 5454 zone_status = zone_status_get(zone); 5455 if (buf != NULL && 5456 copyout(&zone_status, buf, bufsize) != 0) 5457 error = EFAULT; 5458 break; 5459 case ZONE_ATTR_FLAGS: 5460 size = sizeof (zone->zone_flags); 5461 if (bufsize > size) 5462 bufsize = size; 5463 flags = zone->zone_flags; 5464 if (buf != NULL && 5465 copyout(&flags, buf, bufsize) != 0) 5466 error = EFAULT; 5467 break; 5468 case ZONE_ATTR_PRIVSET: 5469 size = sizeof (priv_set_t); 5470 if (bufsize > size) 5471 bufsize = size; 5472 if (buf != NULL && 5473 copyout(zone->zone_privset, buf, bufsize) != 0) 5474 error = EFAULT; 5475 break; 5476 case ZONE_ATTR_UNIQID: 5477 size = sizeof (zone->zone_uniqid); 5478 if (bufsize > size) 5479 bufsize = size; 5480 if (buf != NULL && 5481 copyout(&zone->zone_uniqid, buf, bufsize) != 0) 5482 error = EFAULT; 5483 break; 5484 case ZONE_ATTR_POOLID: 5485 { 5486 pool_t *pool; 5487 poolid_t poolid; 5488 5489 if (pool_lock_intr() != 0) { 5490 error = EINTR; 5491 break; 5492 } 5493 pool = zone_pool_get(zone); 5494 poolid = pool->pool_id; 5495 pool_unlock(); 5496 size = sizeof (poolid); 5497 if (bufsize > size) 5498 bufsize = size; 5499 if (buf != NULL && copyout(&poolid, buf, size) != 0) 5500 error = EFAULT; 5501 } 5502 break; 5503 case ZONE_ATTR_SLBL: 5504 size = sizeof (bslabel_t); 5505 if (bufsize > size) 5506 bufsize = size; 5507 if (zone->zone_slabel == NULL) 5508 error = EINVAL; 5509 else if (buf != NULL && 5510 copyout(label2bslabel(zone->zone_slabel), buf, 5511 bufsize) != 0) 5512 error = EFAULT; 5513 break; 5514 case ZONE_ATTR_INITPID: 5515 size = sizeof (initpid); 5516 if (bufsize > size) 5517 bufsize = size; 5518 initpid = zone->zone_proc_initpid; 5519 if (initpid == -1) { 5520 error = ESRCH; 5521 break; 5522 } 5523 if (buf != NULL && 5524 copyout(&initpid, buf, bufsize) != 0) 5525 error = EFAULT; 5526 break; 5527 case ZONE_ATTR_BRAND: 5528 size = strlen(zone->zone_brand->b_name) + 1; 5529 5530 if (bufsize > size) 5531 bufsize = size; 5532 if (buf != NULL) { 5533 err = copyoutstr(zone->zone_brand->b_name, buf, 5534 bufsize, NULL); 5535 if (err != 0 && err != ENAMETOOLONG) 5536 error = EFAULT; 5537 } 5538 break; 5539 case ZONE_ATTR_INITNAME: 5540 size = strlen(zone->zone_initname) + 1; 5541 if (bufsize > size) 5542 bufsize = size; 5543 if (buf != NULL) { 5544 err = copyoutstr(zone->zone_initname, buf, bufsize, 5545 NULL); 5546 if (err != 0 && err != ENAMETOOLONG) 5547 error = EFAULT; 5548 } 5549 break; 5550 case ZONE_ATTR_BOOTARGS: 5551 if (zone->zone_bootargs == NULL) 5552 outstr = ""; 5553 else 5554 outstr = zone->zone_bootargs; 5555 size = strlen(outstr) + 1; 5556 if (bufsize > size) 5557 bufsize = size; 5558 if (buf != NULL) { 5559 err = copyoutstr(outstr, buf, bufsize, NULL); 5560 if (err != 0 && err != ENAMETOOLONG) 5561 error = EFAULT; 5562 } 5563 break; 5564 case ZONE_ATTR_PHYS_MCAP: 5565 size = sizeof (zone->zone_phys_mcap); 5566 if (bufsize > size) 5567 bufsize = size; 5568 if (buf != NULL && 5569 copyout(&zone->zone_phys_mcap, buf, bufsize) != 0) 5570 error = EFAULT; 5571 break; 5572 case ZONE_ATTR_SCHED_CLASS: 5573 mutex_enter(&class_lock); 5574 5575 if (zone->zone_defaultcid >= loaded_classes) 5576 outstr = ""; 5577 else 5578 outstr = sclass[zone->zone_defaultcid].cl_name; 5579 size = strlen(outstr) + 1; 5580 if (bufsize > size) 5581 bufsize = size; 5582 if (buf != NULL) { 5583 err = copyoutstr(outstr, buf, bufsize, NULL); 5584 if (err != 0 && err != ENAMETOOLONG) 5585 error = EFAULT; 5586 } 5587 5588 mutex_exit(&class_lock); 5589 break; 5590 case ZONE_ATTR_HOSTID: 5591 if (zone->zone_hostid != HW_INVALID_HOSTID && 5592 bufsize == sizeof (zone->zone_hostid)) { 5593 size = sizeof (zone->zone_hostid); 5594 if (buf != NULL && copyout(&zone->zone_hostid, buf, 5595 bufsize) != 0) 5596 error = EFAULT; 5597 } else { 5598 error = EINVAL; 5599 } 5600 break; 5601 case ZONE_ATTR_FS_ALLOWED: 5602 if (zone->zone_fs_allowed == NULL) 5603 outstr = ""; 5604 else 5605 outstr = zone->zone_fs_allowed; 5606 size = strlen(outstr) + 1; 5607 if (bufsize > size) 5608 bufsize = size; 5609 if (buf != NULL) { 5610 err = copyoutstr(outstr, buf, bufsize, NULL); 5611 if (err != 0 && err != ENAMETOOLONG) 5612 error = EFAULT; 5613 } 5614 break; 5615 case ZONE_ATTR_NETWORK: 5616 zbuf = kmem_alloc(bufsize, KM_SLEEP); 5617 if (copyin(buf, zbuf, bufsize) != 0) { 5618 error = EFAULT; 5619 } else { 5620 error = zone_get_network(zoneid, zbuf); 5621 if (error == 0 && copyout(zbuf, buf, bufsize) != 0) 5622 error = EFAULT; 5623 } 5624 kmem_free(zbuf, bufsize); 5625 break; 5626 default: 5627 if ((attr >= ZONE_ATTR_BRAND_ATTRS) && ZONE_IS_BRANDED(zone)) { 5628 size = bufsize; 5629 error = ZBROP(zone)->b_getattr(zone, attr, buf, &size); 5630 } else { 5631 error = EINVAL; 5632 } 5633 } 5634 zone_rele(zone); 5635 5636 if (error) 5637 return (set_errno(error)); 5638 return ((ssize_t)size); 5639 } 5640 5641 /* 5642 * Systemcall entry point for zone_setattr(2). 5643 */ 5644 /*ARGSUSED*/ 5645 static int 5646 zone_setattr(zoneid_t zoneid, int attr, void *buf, size_t bufsize) 5647 { 5648 zone_t *zone; 5649 zone_status_t zone_status; 5650 int err = -1; 5651 zone_net_data_t *zbuf; 5652 5653 if (secpolicy_zone_config(CRED()) != 0) 5654 return (set_errno(EPERM)); 5655 5656 /* 5657 * Only the ZONE_ATTR_PHYS_MCAP attribute can be set on the 5658 * global zone. 5659 */ 5660 if (zoneid == GLOBAL_ZONEID && attr != ZONE_ATTR_PHYS_MCAP) { 5661 return (set_errno(EINVAL)); 5662 } 5663 5664 mutex_enter(&zonehash_lock); 5665 if ((zone = zone_find_all_by_id(zoneid)) == NULL) { 5666 mutex_exit(&zonehash_lock); 5667 return (set_errno(EINVAL)); 5668 } 5669 zone_hold(zone); 5670 mutex_exit(&zonehash_lock); 5671 5672 /* 5673 * At present most attributes can only be set on non-running, 5674 * non-global zones. 5675 */ 5676 zone_status = zone_status_get(zone); 5677 if (attr != ZONE_ATTR_PHYS_MCAP && zone_status > ZONE_IS_READY) { 5678 err = EINVAL; 5679 goto done; 5680 } 5681 5682 switch (attr) { 5683 case ZONE_ATTR_INITNAME: 5684 err = zone_set_initname(zone, (const char *)buf); 5685 break; 5686 case ZONE_ATTR_INITNORESTART: 5687 zone->zone_restart_init = B_FALSE; 5688 err = 0; 5689 break; 5690 case ZONE_ATTR_BOOTARGS: 5691 err = zone_set_bootargs(zone, (const char *)buf); 5692 break; 5693 case ZONE_ATTR_BRAND: 5694 err = zone_set_brand(zone, (const char *)buf); 5695 break; 5696 case ZONE_ATTR_FS_ALLOWED: 5697 err = zone_set_fs_allowed(zone, (const char *)buf); 5698 break; 5699 case ZONE_ATTR_PHYS_MCAP: 5700 err = zone_set_phys_mcap(zone, (const uint64_t *)buf); 5701 break; 5702 case ZONE_ATTR_SCHED_CLASS: 5703 err = zone_set_sched_class(zone, (const char *)buf); 5704 break; 5705 case ZONE_ATTR_HOSTID: 5706 if (bufsize == sizeof (zone->zone_hostid)) { 5707 if (copyin(buf, &zone->zone_hostid, bufsize) == 0) 5708 err = 0; 5709 else 5710 err = EFAULT; 5711 } else { 5712 err = EINVAL; 5713 } 5714 break; 5715 case ZONE_ATTR_NETWORK: 5716 if (bufsize > (PIPE_BUF + sizeof (zone_net_data_t))) { 5717 err = EINVAL; 5718 break; 5719 } 5720 zbuf = kmem_alloc(bufsize, KM_SLEEP); 5721 if (copyin(buf, zbuf, bufsize) != 0) { 5722 kmem_free(zbuf, bufsize); 5723 err = EFAULT; 5724 break; 5725 } 5726 err = zone_set_network(zoneid, zbuf); 5727 kmem_free(zbuf, bufsize); 5728 break; 5729 default: 5730 if ((attr >= ZONE_ATTR_BRAND_ATTRS) && ZONE_IS_BRANDED(zone)) 5731 err = ZBROP(zone)->b_setattr(zone, attr, buf, bufsize); 5732 else 5733 err = EINVAL; 5734 } 5735 5736 done: 5737 zone_rele(zone); 5738 ASSERT(err != -1); 5739 return (err != 0 ? set_errno(err) : 0); 5740 } 5741 5742 /* 5743 * Return zero if the process has at least one vnode mapped in to its 5744 * address space which shouldn't be allowed to change zones. 5745 * 5746 * Also return zero if the process has any shared mappings which reserve 5747 * swap. This is because the counting for zone.max-swap does not allow swap 5748 * reservation to be shared between zones. zone swap reservation is counted 5749 * on zone->zone_max_swap. 5750 */ 5751 static int 5752 as_can_change_zones(void) 5753 { 5754 proc_t *pp = curproc; 5755 struct seg *seg; 5756 struct as *as = pp->p_as; 5757 vnode_t *vp; 5758 int allow = 1; 5759 5760 ASSERT(pp->p_as != &kas); 5761 AS_LOCK_ENTER(as, RW_READER); 5762 for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg)) { 5763 5764 /* 5765 * Cannot enter zone with shared anon memory which 5766 * reserves swap. See comment above. 5767 */ 5768 if (seg_can_change_zones(seg) == B_FALSE) { 5769 allow = 0; 5770 break; 5771 } 5772 /* 5773 * if we can't get a backing vnode for this segment then skip 5774 * it. 5775 */ 5776 vp = NULL; 5777 if (SEGOP_GETVP(seg, seg->s_base, &vp) != 0 || vp == NULL) 5778 continue; 5779 if (!vn_can_change_zones(vp)) { /* bail on first match */ 5780 allow = 0; 5781 break; 5782 } 5783 } 5784 AS_LOCK_EXIT(as); 5785 return (allow); 5786 } 5787 5788 /* 5789 * Count swap reserved by curproc's address space 5790 */ 5791 static size_t 5792 as_swresv(void) 5793 { 5794 proc_t *pp = curproc; 5795 struct seg *seg; 5796 struct as *as = pp->p_as; 5797 size_t swap = 0; 5798 5799 ASSERT(pp->p_as != &kas); 5800 ASSERT(AS_WRITE_HELD(as)); 5801 for (seg = AS_SEGFIRST(as); seg != NULL; seg = AS_SEGNEXT(as, seg)) 5802 swap += seg_swresv(seg); 5803 5804 return (swap); 5805 } 5806 5807 /* 5808 * Systemcall entry point for zone_enter(). 5809 * 5810 * The current process is injected into said zone. In the process 5811 * it will change its project membership, privileges, rootdir/cwd, 5812 * zone-wide rctls, and pool association to match those of the zone. 5813 * 5814 * The first zone_enter() called while the zone is in the ZONE_IS_READY 5815 * state will transition it to ZONE_IS_RUNNING. Processes may only 5816 * enter a zone that is "ready" or "running". 5817 */ 5818 static int 5819 zone_enter(zoneid_t zoneid) 5820 { 5821 zone_t *zone; 5822 vnode_t *vp; 5823 proc_t *pp = curproc; 5824 contract_t *ct; 5825 cont_process_t *ctp; 5826 task_t *tk, *oldtk; 5827 kproject_t *zone_proj0; 5828 cred_t *cr, *newcr; 5829 pool_t *oldpool, *newpool; 5830 sess_t *sp; 5831 uid_t uid; 5832 zone_status_t status; 5833 int err = 0; 5834 rctl_entity_p_t e; 5835 size_t swap; 5836 kthread_id_t t; 5837 5838 if (secpolicy_zone_config(CRED()) != 0) 5839 return (set_errno(EPERM)); 5840 if (zoneid < MIN_USERZONEID || zoneid > MAX_ZONEID) 5841 return (set_errno(EINVAL)); 5842 5843 /* 5844 * Stop all lwps so we don't need to hold a lock to look at 5845 * curproc->p_zone. This needs to happen before we grab any 5846 * locks to avoid deadlock (another lwp in the process could 5847 * be waiting for the held lock). 5848 */ 5849 if (curthread != pp->p_agenttp && !holdlwps(SHOLDFORK)) 5850 return (set_errno(EINTR)); 5851 5852 /* 5853 * Make sure we're not changing zones with files open or mapped in 5854 * to our address space which shouldn't be changing zones. 5855 */ 5856 if (!files_can_change_zones()) { 5857 err = EBADF; 5858 goto out; 5859 } 5860 if (!as_can_change_zones()) { 5861 err = EFAULT; 5862 goto out; 5863 } 5864 5865 mutex_enter(&zonehash_lock); 5866 if (pp->p_zone != global_zone) { 5867 mutex_exit(&zonehash_lock); 5868 err = EINVAL; 5869 goto out; 5870 } 5871 5872 zone = zone_find_all_by_id(zoneid); 5873 if (zone == NULL) { 5874 mutex_exit(&zonehash_lock); 5875 err = EINVAL; 5876 goto out; 5877 } 5878 5879 /* 5880 * To prevent processes in a zone from holding contracts on 5881 * extrazonal resources, and to avoid process contract 5882 * memberships which span zones, contract holders and processes 5883 * which aren't the sole members of their encapsulating process 5884 * contracts are not allowed to zone_enter. 5885 */ 5886 ctp = pp->p_ct_process; 5887 ct = &ctp->conp_contract; 5888 mutex_enter(&ct->ct_lock); 5889 mutex_enter(&pp->p_lock); 5890 if ((avl_numnodes(&pp->p_ct_held) != 0) || (ctp->conp_nmembers != 1)) { 5891 mutex_exit(&pp->p_lock); 5892 mutex_exit(&ct->ct_lock); 5893 mutex_exit(&zonehash_lock); 5894 err = EINVAL; 5895 goto out; 5896 } 5897 5898 /* 5899 * Moreover, we don't allow processes whose encapsulating 5900 * process contracts have inherited extrazonal contracts. 5901 * While it would be easier to eliminate all process contracts 5902 * with inherited contracts, we need to be able to give a 5903 * restarted init (or other zone-penetrating process) its 5904 * predecessor's contracts. 5905 */ 5906 if (ctp->conp_ninherited != 0) { 5907 contract_t *next; 5908 for (next = list_head(&ctp->conp_inherited); next; 5909 next = list_next(&ctp->conp_inherited, next)) { 5910 if (contract_getzuniqid(next) != zone->zone_uniqid) { 5911 mutex_exit(&pp->p_lock); 5912 mutex_exit(&ct->ct_lock); 5913 mutex_exit(&zonehash_lock); 5914 err = EINVAL; 5915 goto out; 5916 } 5917 } 5918 } 5919 5920 mutex_exit(&pp->p_lock); 5921 mutex_exit(&ct->ct_lock); 5922 5923 status = zone_status_get(zone); 5924 if (status < ZONE_IS_READY || status >= ZONE_IS_SHUTTING_DOWN) { 5925 /* 5926 * Can't join 5927 */ 5928 mutex_exit(&zonehash_lock); 5929 err = EINVAL; 5930 goto out; 5931 } 5932 5933 /* 5934 * Make sure new priv set is within the permitted set for caller 5935 */ 5936 if (!priv_issubset(zone->zone_privset, &CR_OPPRIV(CRED()))) { 5937 mutex_exit(&zonehash_lock); 5938 err = EPERM; 5939 goto out; 5940 } 5941 /* 5942 * We want to momentarily drop zonehash_lock while we optimistically 5943 * bind curproc to the pool it should be running in. This is safe 5944 * since the zone can't disappear (we have a hold on it). 5945 */ 5946 zone_hold(zone); 5947 mutex_exit(&zonehash_lock); 5948 5949 /* 5950 * Grab pool_lock to keep the pools configuration from changing 5951 * and to stop ourselves from getting rebound to another pool 5952 * until we join the zone. 5953 */ 5954 if (pool_lock_intr() != 0) { 5955 zone_rele(zone); 5956 err = EINTR; 5957 goto out; 5958 } 5959 ASSERT(secpolicy_pool(CRED()) == 0); 5960 /* 5961 * Bind ourselves to the pool currently associated with the zone. 5962 */ 5963 oldpool = curproc->p_pool; 5964 newpool = zone_pool_get(zone); 5965 if (pool_state == POOL_ENABLED && newpool != oldpool && 5966 (err = pool_do_bind(newpool, P_PID, P_MYID, 5967 POOL_BIND_ALL)) != 0) { 5968 pool_unlock(); 5969 zone_rele(zone); 5970 goto out; 5971 } 5972 5973 /* 5974 * Grab cpu_lock now; we'll need it later when we call 5975 * task_join(). 5976 */ 5977 mutex_enter(&cpu_lock); 5978 mutex_enter(&zonehash_lock); 5979 /* 5980 * Make sure the zone hasn't moved on since we dropped zonehash_lock. 5981 */ 5982 if (zone_status_get(zone) >= ZONE_IS_SHUTTING_DOWN) { 5983 /* 5984 * Can't join anymore. 5985 */ 5986 mutex_exit(&zonehash_lock); 5987 mutex_exit(&cpu_lock); 5988 if (pool_state == POOL_ENABLED && 5989 newpool != oldpool) 5990 (void) pool_do_bind(oldpool, P_PID, P_MYID, 5991 POOL_BIND_ALL); 5992 pool_unlock(); 5993 zone_rele(zone); 5994 err = EINVAL; 5995 goto out; 5996 } 5997 5998 /* 5999 * a_lock must be held while transfering locked memory and swap 6000 * reservation from the global zone to the non global zone because 6001 * asynchronous faults on the processes' address space can lock 6002 * memory and reserve swap via MCL_FUTURE and MAP_NORESERVE 6003 * segments respectively. 6004 */ 6005 AS_LOCK_ENTER(pp->p_as, RW_WRITER); 6006 swap = as_swresv(); 6007 mutex_enter(&pp->p_lock); 6008 zone_proj0 = zone->zone_zsched->p_task->tk_proj; 6009 /* verify that we do not exceed and task or lwp limits */ 6010 mutex_enter(&zone->zone_nlwps_lock); 6011 /* add new lwps to zone and zone's proj0 */ 6012 zone_proj0->kpj_nlwps += pp->p_lwpcnt; 6013 zone->zone_nlwps += pp->p_lwpcnt; 6014 /* add 1 task to zone's proj0 */ 6015 zone_proj0->kpj_ntasks += 1; 6016 6017 zone_proj0->kpj_nprocs++; 6018 zone->zone_nprocs++; 6019 mutex_exit(&zone->zone_nlwps_lock); 6020 6021 mutex_enter(&zone->zone_mem_lock); 6022 zone->zone_locked_mem += pp->p_locked_mem; 6023 zone_proj0->kpj_data.kpd_locked_mem += pp->p_locked_mem; 6024 zone->zone_max_swap += swap; 6025 mutex_exit(&zone->zone_mem_lock); 6026 6027 mutex_enter(&(zone_proj0->kpj_data.kpd_crypto_lock)); 6028 zone_proj0->kpj_data.kpd_crypto_mem += pp->p_crypto_mem; 6029 mutex_exit(&(zone_proj0->kpj_data.kpd_crypto_lock)); 6030 6031 /* remove lwps and process from proc's old zone and old project */ 6032 mutex_enter(&pp->p_zone->zone_nlwps_lock); 6033 pp->p_zone->zone_nlwps -= pp->p_lwpcnt; 6034 pp->p_task->tk_proj->kpj_nlwps -= pp->p_lwpcnt; 6035 pp->p_task->tk_proj->kpj_nprocs--; 6036 pp->p_zone->zone_nprocs--; 6037 mutex_exit(&pp->p_zone->zone_nlwps_lock); 6038 6039 mutex_enter(&pp->p_zone->zone_mem_lock); 6040 pp->p_zone->zone_locked_mem -= pp->p_locked_mem; 6041 pp->p_task->tk_proj->kpj_data.kpd_locked_mem -= pp->p_locked_mem; 6042 pp->p_zone->zone_max_swap -= swap; 6043 mutex_exit(&pp->p_zone->zone_mem_lock); 6044 6045 mutex_enter(&(pp->p_task->tk_proj->kpj_data.kpd_crypto_lock)); 6046 pp->p_task->tk_proj->kpj_data.kpd_crypto_mem -= pp->p_crypto_mem; 6047 mutex_exit(&(pp->p_task->tk_proj->kpj_data.kpd_crypto_lock)); 6048 6049 pp->p_flag |= SZONETOP; 6050 pp->p_zone = zone; 6051 mutex_exit(&pp->p_lock); 6052 AS_LOCK_EXIT(pp->p_as); 6053 6054 /* 6055 * Joining the zone cannot fail from now on. 6056 * 6057 * This means that a lot of the following code can be commonized and 6058 * shared with zsched(). 6059 */ 6060 6061 /* 6062 * If the process contract fmri was inherited, we need to 6063 * flag this so that any contract status will not leak 6064 * extra zone information, svc_fmri in this case 6065 */ 6066 if (ctp->conp_svc_ctid != ct->ct_id) { 6067 mutex_enter(&ct->ct_lock); 6068 ctp->conp_svc_zone_enter = ct->ct_id; 6069 mutex_exit(&ct->ct_lock); 6070 } 6071 6072 /* 6073 * Reset the encapsulating process contract's zone. 6074 */ 6075 ASSERT(ct->ct_mzuniqid == GLOBAL_ZONEUNIQID); 6076 contract_setzuniqid(ct, zone->zone_uniqid); 6077 6078 /* 6079 * Create a new task and associate the process with the project keyed 6080 * by (projid,zoneid). 6081 * 6082 * We might as well be in project 0; the global zone's projid doesn't 6083 * make much sense in a zone anyhow. 6084 * 6085 * This also increments zone_ntasks, and returns with p_lock held. 6086 */ 6087 tk = task_create(0, zone); 6088 oldtk = task_join(tk, 0); 6089 mutex_exit(&cpu_lock); 6090 6091 /* 6092 * call RCTLOP_SET functions on this proc 6093 */ 6094 e.rcep_p.zone = zone; 6095 e.rcep_t = RCENTITY_ZONE; 6096 (void) rctl_set_dup(NULL, NULL, pp, &e, zone->zone_rctls, NULL, 6097 RCD_CALLBACK); 6098 mutex_exit(&pp->p_lock); 6099 6100 /* 6101 * We don't need to hold any of zsched's locks here; not only do we know 6102 * the process and zone aren't going away, we know its session isn't 6103 * changing either. 6104 * 6105 * By joining zsched's session here, we mimic the behavior in the 6106 * global zone of init's sid being the pid of sched. We extend this 6107 * to all zlogin-like zone_enter()'ing processes as well. 6108 */ 6109 mutex_enter(&pidlock); 6110 sp = zone->zone_zsched->p_sessp; 6111 sess_hold(zone->zone_zsched); 6112 mutex_enter(&pp->p_lock); 6113 pgexit(pp); 6114 sess_rele(pp->p_sessp, B_TRUE); 6115 pp->p_sessp = sp; 6116 pgjoin(pp, zone->zone_zsched->p_pidp); 6117 6118 /* 6119 * If any threads are scheduled to be placed on zone wait queue they 6120 * should abandon the idea since the wait queue is changing. 6121 * We need to be holding pidlock & p_lock to do this. 6122 */ 6123 if ((t = pp->p_tlist) != NULL) { 6124 do { 6125 thread_lock(t); 6126 /* 6127 * Kick this thread so that he doesn't sit 6128 * on a wrong wait queue. 6129 */ 6130 if (ISWAITING(t)) 6131 setrun_locked(t); 6132 6133 if (t->t_schedflag & TS_ANYWAITQ) 6134 t->t_schedflag &= ~ TS_ANYWAITQ; 6135 6136 thread_unlock(t); 6137 } while ((t = t->t_forw) != pp->p_tlist); 6138 } 6139 6140 /* 6141 * If there is a default scheduling class for the zone and it is not 6142 * the class we are currently in, change all of the threads in the 6143 * process to the new class. We need to be holding pidlock & p_lock 6144 * when we call parmsset so this is a good place to do it. 6145 */ 6146 if (zone->zone_defaultcid > 0 && 6147 zone->zone_defaultcid != curthread->t_cid) { 6148 pcparms_t pcparms; 6149 6150 pcparms.pc_cid = zone->zone_defaultcid; 6151 pcparms.pc_clparms[0] = 0; 6152 6153 /* 6154 * If setting the class fails, we still want to enter the zone. 6155 */ 6156 if ((t = pp->p_tlist) != NULL) { 6157 do { 6158 (void) parmsset(&pcparms, t); 6159 } while ((t = t->t_forw) != pp->p_tlist); 6160 } 6161 } 6162 6163 mutex_exit(&pp->p_lock); 6164 mutex_exit(&pidlock); 6165 6166 mutex_exit(&zonehash_lock); 6167 /* 6168 * We're firmly in the zone; let pools progress. 6169 */ 6170 pool_unlock(); 6171 task_rele(oldtk); 6172 /* 6173 * We don't need to retain a hold on the zone since we already 6174 * incremented zone_ntasks, so the zone isn't going anywhere. 6175 */ 6176 zone_rele(zone); 6177 6178 /* 6179 * Chroot 6180 */ 6181 vp = zone->zone_rootvp; 6182 zone_chdir(vp, &PTOU(pp)->u_cdir, pp); 6183 zone_chdir(vp, &PTOU(pp)->u_rdir, pp); 6184 6185 /* 6186 * Change process credentials 6187 */ 6188 newcr = cralloc(); 6189 mutex_enter(&pp->p_crlock); 6190 cr = pp->p_cred; 6191 crcopy_to(cr, newcr); 6192 crsetzone(newcr, zone); 6193 pp->p_cred = newcr; 6194 6195 /* 6196 * Restrict all process privilege sets to zone limit 6197 */ 6198 priv_intersect(zone->zone_privset, &CR_PPRIV(newcr)); 6199 priv_intersect(zone->zone_privset, &CR_EPRIV(newcr)); 6200 priv_intersect(zone->zone_privset, &CR_IPRIV(newcr)); 6201 priv_intersect(zone->zone_privset, &CR_LPRIV(newcr)); 6202 mutex_exit(&pp->p_crlock); 6203 crset(pp, newcr); 6204 6205 /* 6206 * Adjust upcount to reflect zone entry. 6207 */ 6208 uid = crgetruid(newcr); 6209 mutex_enter(&pidlock); 6210 upcount_dec(uid, GLOBAL_ZONEID); 6211 upcount_inc(uid, zoneid); 6212 mutex_exit(&pidlock); 6213 6214 /* 6215 * Set up core file path and content. 6216 */ 6217 set_core_defaults(); 6218 6219 out: 6220 /* 6221 * Let the other lwps continue. 6222 */ 6223 mutex_enter(&pp->p_lock); 6224 if (curthread != pp->p_agenttp) 6225 continuelwps(pp); 6226 mutex_exit(&pp->p_lock); 6227 6228 return (err != 0 ? set_errno(err) : 0); 6229 } 6230 6231 /* 6232 * Systemcall entry point for zone_list(2). 6233 * 6234 * Processes running in a (non-global) zone only see themselves. 6235 * On labeled systems, they see all zones whose label they dominate. 6236 */ 6237 static int 6238 zone_list(zoneid_t *zoneidlist, uint_t *numzones) 6239 { 6240 zoneid_t *zoneids; 6241 zone_t *zone, *myzone; 6242 uint_t user_nzones, real_nzones; 6243 uint_t domi_nzones; 6244 int error; 6245 6246 if (copyin(numzones, &user_nzones, sizeof (uint_t)) != 0) 6247 return (set_errno(EFAULT)); 6248 6249 myzone = curproc->p_zone; 6250 if (myzone != global_zone) { 6251 bslabel_t *mybslab; 6252 6253 if (!is_system_labeled()) { 6254 /* just return current zone */ 6255 real_nzones = domi_nzones = 1; 6256 zoneids = kmem_alloc(sizeof (zoneid_t), KM_SLEEP); 6257 zoneids[0] = myzone->zone_id; 6258 } else { 6259 /* return all zones that are dominated */ 6260 mutex_enter(&zonehash_lock); 6261 real_nzones = zonecount; 6262 domi_nzones = 0; 6263 if (real_nzones > 0) { 6264 zoneids = kmem_alloc(real_nzones * 6265 sizeof (zoneid_t), KM_SLEEP); 6266 mybslab = label2bslabel(myzone->zone_slabel); 6267 for (zone = list_head(&zone_active); 6268 zone != NULL; 6269 zone = list_next(&zone_active, zone)) { 6270 if (zone->zone_id == GLOBAL_ZONEID) 6271 continue; 6272 if (zone != myzone && 6273 (zone->zone_flags & ZF_IS_SCRATCH)) 6274 continue; 6275 /* 6276 * Note that a label always dominates 6277 * itself, so myzone is always included 6278 * in the list. 6279 */ 6280 if (bldominates(mybslab, 6281 label2bslabel(zone->zone_slabel))) { 6282 zoneids[domi_nzones++] = 6283 zone->zone_id; 6284 } 6285 } 6286 } 6287 mutex_exit(&zonehash_lock); 6288 } 6289 } else { 6290 mutex_enter(&zonehash_lock); 6291 real_nzones = zonecount; 6292 domi_nzones = 0; 6293 if (real_nzones > 0) { 6294 zoneids = kmem_alloc(real_nzones * sizeof (zoneid_t), 6295 KM_SLEEP); 6296 for (zone = list_head(&zone_active); zone != NULL; 6297 zone = list_next(&zone_active, zone)) 6298 zoneids[domi_nzones++] = zone->zone_id; 6299 ASSERT(domi_nzones == real_nzones); 6300 } 6301 mutex_exit(&zonehash_lock); 6302 } 6303 6304 /* 6305 * If user has allocated space for fewer entries than we found, then 6306 * return only up to his limit. Either way, tell him exactly how many 6307 * we found. 6308 */ 6309 if (domi_nzones < user_nzones) 6310 user_nzones = domi_nzones; 6311 error = 0; 6312 if (copyout(&domi_nzones, numzones, sizeof (uint_t)) != 0) { 6313 error = EFAULT; 6314 } else if (zoneidlist != NULL && user_nzones != 0) { 6315 if (copyout(zoneids, zoneidlist, 6316 user_nzones * sizeof (zoneid_t)) != 0) 6317 error = EFAULT; 6318 } 6319 6320 if (real_nzones > 0) 6321 kmem_free(zoneids, real_nzones * sizeof (zoneid_t)); 6322 6323 if (error != 0) 6324 return (set_errno(error)); 6325 else 6326 return (0); 6327 } 6328 6329 /* 6330 * Systemcall entry point for zone_lookup(2). 6331 * 6332 * Non-global zones are only able to see themselves and (on labeled systems) 6333 * the zones they dominate. 6334 */ 6335 static zoneid_t 6336 zone_lookup(const char *zone_name) 6337 { 6338 char *kname; 6339 zone_t *zone; 6340 zoneid_t zoneid; 6341 int err; 6342 6343 if (zone_name == NULL) { 6344 /* return caller's zone id */ 6345 return (getzoneid()); 6346 } 6347 6348 kname = kmem_zalloc(ZONENAME_MAX, KM_SLEEP); 6349 if ((err = copyinstr(zone_name, kname, ZONENAME_MAX, NULL)) != 0) { 6350 kmem_free(kname, ZONENAME_MAX); 6351 return (set_errno(err)); 6352 } 6353 6354 mutex_enter(&zonehash_lock); 6355 zone = zone_find_all_by_name(kname); 6356 kmem_free(kname, ZONENAME_MAX); 6357 /* 6358 * In a non-global zone, can only lookup global and own name. 6359 * In Trusted Extensions zone label dominance rules apply. 6360 */ 6361 if (zone == NULL || 6362 zone_status_get(zone) < ZONE_IS_READY || 6363 !zone_list_access(zone)) { 6364 mutex_exit(&zonehash_lock); 6365 return (set_errno(EINVAL)); 6366 } else { 6367 zoneid = zone->zone_id; 6368 mutex_exit(&zonehash_lock); 6369 return (zoneid); 6370 } 6371 } 6372 6373 static int 6374 zone_version(int *version_arg) 6375 { 6376 int version = ZONE_SYSCALL_API_VERSION; 6377 6378 if (copyout(&version, version_arg, sizeof (int)) != 0) 6379 return (set_errno(EFAULT)); 6380 return (0); 6381 } 6382 6383 /* ARGSUSED */ 6384 long 6385 zone(int cmd, void *arg1, void *arg2, void *arg3, void *arg4) 6386 { 6387 zone_def zs; 6388 int err; 6389 6390 switch (cmd) { 6391 case ZONE_CREATE: 6392 if (get_udatamodel() == DATAMODEL_NATIVE) { 6393 if (copyin(arg1, &zs, sizeof (zone_def))) { 6394 return (set_errno(EFAULT)); 6395 } 6396 } else { 6397 #ifdef _SYSCALL32_IMPL 6398 zone_def32 zs32; 6399 6400 if (copyin(arg1, &zs32, sizeof (zone_def32))) { 6401 return (set_errno(EFAULT)); 6402 } 6403 zs.zone_name = 6404 (const char *)(unsigned long)zs32.zone_name; 6405 zs.zone_root = 6406 (const char *)(unsigned long)zs32.zone_root; 6407 zs.zone_privs = 6408 (const struct priv_set *) 6409 (unsigned long)zs32.zone_privs; 6410 zs.zone_privssz = zs32.zone_privssz; 6411 zs.rctlbuf = (caddr_t)(unsigned long)zs32.rctlbuf; 6412 zs.rctlbufsz = zs32.rctlbufsz; 6413 zs.zfsbuf = (caddr_t)(unsigned long)zs32.zfsbuf; 6414 zs.zfsbufsz = zs32.zfsbufsz; 6415 zs.extended_error = 6416 (int *)(unsigned long)zs32.extended_error; 6417 zs.match = zs32.match; 6418 zs.doi = zs32.doi; 6419 zs.label = (const bslabel_t *)(uintptr_t)zs32.label; 6420 zs.flags = zs32.flags; 6421 #else 6422 panic("get_udatamodel() returned bogus result\n"); 6423 #endif 6424 } 6425 6426 return (zone_create(zs.zone_name, zs.zone_root, 6427 zs.zone_privs, zs.zone_privssz, 6428 (caddr_t)zs.rctlbuf, zs.rctlbufsz, 6429 (caddr_t)zs.zfsbuf, zs.zfsbufsz, 6430 zs.extended_error, zs.match, zs.doi, 6431 zs.label, zs.flags)); 6432 case ZONE_BOOT: 6433 return (zone_boot((zoneid_t)(uintptr_t)arg1)); 6434 case ZONE_DESTROY: 6435 return (zone_destroy((zoneid_t)(uintptr_t)arg1)); 6436 case ZONE_GETATTR: 6437 return (zone_getattr((zoneid_t)(uintptr_t)arg1, 6438 (int)(uintptr_t)arg2, arg3, (size_t)arg4)); 6439 case ZONE_SETATTR: 6440 return (zone_setattr((zoneid_t)(uintptr_t)arg1, 6441 (int)(uintptr_t)arg2, arg3, (size_t)arg4)); 6442 case ZONE_ENTER: 6443 return (zone_enter((zoneid_t)(uintptr_t)arg1)); 6444 case ZONE_LIST: 6445 return (zone_list((zoneid_t *)arg1, (uint_t *)arg2)); 6446 case ZONE_SHUTDOWN: 6447 return (zone_shutdown((zoneid_t)(uintptr_t)arg1)); 6448 case ZONE_LOOKUP: 6449 return (zone_lookup((const char *)arg1)); 6450 case ZONE_VERSION: 6451 return (zone_version((int *)arg1)); 6452 case ZONE_ADD_DATALINK: 6453 return (zone_add_datalink((zoneid_t)(uintptr_t)arg1, 6454 (datalink_id_t)(uintptr_t)arg2)); 6455 case ZONE_DEL_DATALINK: 6456 return (zone_remove_datalink((zoneid_t)(uintptr_t)arg1, 6457 (datalink_id_t)(uintptr_t)arg2)); 6458 case ZONE_CHECK_DATALINK: { 6459 zoneid_t zoneid; 6460 boolean_t need_copyout; 6461 6462 if (copyin(arg1, &zoneid, sizeof (zoneid)) != 0) 6463 return (EFAULT); 6464 need_copyout = (zoneid == ALL_ZONES); 6465 err = zone_check_datalink(&zoneid, 6466 (datalink_id_t)(uintptr_t)arg2); 6467 if (err == 0 && need_copyout) { 6468 if (copyout(&zoneid, arg1, sizeof (zoneid)) != 0) 6469 err = EFAULT; 6470 } 6471 return (err == 0 ? 0 : set_errno(err)); 6472 } 6473 case ZONE_LIST_DATALINK: 6474 return (zone_list_datalink((zoneid_t)(uintptr_t)arg1, 6475 (int *)arg2, (datalink_id_t *)(uintptr_t)arg3)); 6476 default: 6477 return (set_errno(EINVAL)); 6478 } 6479 } 6480 6481 struct zarg { 6482 zone_t *zone; 6483 zone_cmd_arg_t arg; 6484 }; 6485 6486 static int 6487 zone_lookup_door(const char *zone_name, door_handle_t *doorp) 6488 { 6489 char *buf; 6490 size_t buflen; 6491 int error; 6492 6493 buflen = sizeof (ZONE_DOOR_PATH) + strlen(zone_name); 6494 buf = kmem_alloc(buflen, KM_SLEEP); 6495 (void) snprintf(buf, buflen, ZONE_DOOR_PATH, zone_name); 6496 error = door_ki_open(buf, doorp); 6497 kmem_free(buf, buflen); 6498 return (error); 6499 } 6500 6501 static void 6502 zone_release_door(door_handle_t *doorp) 6503 { 6504 door_ki_rele(*doorp); 6505 *doorp = NULL; 6506 } 6507 6508 static void 6509 zone_ki_call_zoneadmd(struct zarg *zargp) 6510 { 6511 door_handle_t door = NULL; 6512 door_arg_t darg, save_arg; 6513 char *zone_name; 6514 size_t zone_namelen; 6515 zoneid_t zoneid; 6516 zone_t *zone; 6517 zone_cmd_arg_t arg; 6518 uint64_t uniqid; 6519 size_t size; 6520 int error; 6521 int retry; 6522 6523 zone = zargp->zone; 6524 arg = zargp->arg; 6525 kmem_free(zargp, sizeof (*zargp)); 6526 6527 zone_namelen = strlen(zone->zone_name) + 1; 6528 zone_name = kmem_alloc(zone_namelen, KM_SLEEP); 6529 bcopy(zone->zone_name, zone_name, zone_namelen); 6530 zoneid = zone->zone_id; 6531 uniqid = zone->zone_uniqid; 6532 /* 6533 * zoneadmd may be down, but at least we can empty out the zone. 6534 * We can ignore the return value of zone_empty() since we're called 6535 * from a kernel thread and know we won't be delivered any signals. 6536 */ 6537 ASSERT(curproc == &p0); 6538 (void) zone_empty(zone); 6539 ASSERT(zone_status_get(zone) >= ZONE_IS_EMPTY); 6540 zone_rele(zone); 6541 6542 size = sizeof (arg); 6543 darg.rbuf = (char *)&arg; 6544 darg.data_ptr = (char *)&arg; 6545 darg.rsize = size; 6546 darg.data_size = size; 6547 darg.desc_ptr = NULL; 6548 darg.desc_num = 0; 6549 6550 save_arg = darg; 6551 /* 6552 * Since we're not holding a reference to the zone, any number of 6553 * things can go wrong, including the zone disappearing before we get a 6554 * chance to talk to zoneadmd. 6555 */ 6556 for (retry = 0; /* forever */; retry++) { 6557 if (door == NULL && 6558 (error = zone_lookup_door(zone_name, &door)) != 0) { 6559 goto next; 6560 } 6561 ASSERT(door != NULL); 6562 6563 if ((error = door_ki_upcall_limited(door, &darg, NULL, 6564 SIZE_MAX, 0)) == 0) { 6565 break; 6566 } 6567 switch (error) { 6568 case EINTR: 6569 /* FALLTHROUGH */ 6570 case EAGAIN: /* process may be forking */ 6571 /* 6572 * Back off for a bit 6573 */ 6574 break; 6575 case EBADF: 6576 zone_release_door(&door); 6577 if (zone_lookup_door(zone_name, &door) != 0) { 6578 /* 6579 * zoneadmd may be dead, but it may come back to 6580 * life later. 6581 */ 6582 break; 6583 } 6584 break; 6585 default: 6586 cmn_err(CE_WARN, 6587 "zone_ki_call_zoneadmd: door_ki_upcall error %d\n", 6588 error); 6589 goto out; 6590 } 6591 next: 6592 /* 6593 * If this isn't the same zone_t that we originally had in mind, 6594 * then this is the same as if two kadmin requests come in at 6595 * the same time: the first one wins. This means we lose, so we 6596 * bail. 6597 */ 6598 if ((zone = zone_find_by_id(zoneid)) == NULL) { 6599 /* 6600 * Problem is solved. 6601 */ 6602 break; 6603 } 6604 if (zone->zone_uniqid != uniqid) { 6605 /* 6606 * zoneid recycled 6607 */ 6608 zone_rele(zone); 6609 break; 6610 } 6611 /* 6612 * We could zone_status_timedwait(), but there doesn't seem to 6613 * be much point in doing that (plus, it would mean that 6614 * zone_free() isn't called until this thread exits). 6615 */ 6616 zone_rele(zone); 6617 delay(hz); 6618 darg = save_arg; 6619 } 6620 out: 6621 if (door != NULL) { 6622 zone_release_door(&door); 6623 } 6624 kmem_free(zone_name, zone_namelen); 6625 thread_exit(); 6626 } 6627 6628 /* 6629 * Entry point for uadmin() to tell the zone to go away or reboot. Analog to 6630 * kadmin(). The caller is a process in the zone. 6631 * 6632 * In order to shutdown the zone, we will hand off control to zoneadmd 6633 * (running in the global zone) via a door. We do a half-hearted job at 6634 * killing all processes in the zone, create a kernel thread to contact 6635 * zoneadmd, and make note of the "uniqid" of the zone. The uniqid is 6636 * a form of generation number used to let zoneadmd (as well as 6637 * zone_destroy()) know exactly which zone they're re talking about. 6638 */ 6639 int 6640 zone_kadmin(int cmd, int fcn, const char *mdep, cred_t *credp) 6641 { 6642 struct zarg *zargp; 6643 zone_cmd_t zcmd; 6644 zone_t *zone; 6645 6646 zone = curproc->p_zone; 6647 ASSERT(getzoneid() != GLOBAL_ZONEID); 6648 6649 switch (cmd) { 6650 case A_SHUTDOWN: 6651 switch (fcn) { 6652 case AD_HALT: 6653 case AD_POWEROFF: 6654 zcmd = Z_HALT; 6655 break; 6656 case AD_BOOT: 6657 zcmd = Z_REBOOT; 6658 break; 6659 case AD_IBOOT: 6660 case AD_SBOOT: 6661 case AD_SIBOOT: 6662 case AD_NOSYNC: 6663 return (ENOTSUP); 6664 default: 6665 return (EINVAL); 6666 } 6667 break; 6668 case A_REBOOT: 6669 zcmd = Z_REBOOT; 6670 break; 6671 case A_FTRACE: 6672 case A_REMOUNT: 6673 case A_FREEZE: 6674 case A_DUMP: 6675 case A_CONFIG: 6676 return (ENOTSUP); 6677 default: 6678 ASSERT(cmd != A_SWAPCTL); /* handled by uadmin() */ 6679 return (EINVAL); 6680 } 6681 6682 if (secpolicy_zone_admin(credp, B_FALSE)) 6683 return (EPERM); 6684 mutex_enter(&zone_status_lock); 6685 6686 /* 6687 * zone_status can't be ZONE_IS_EMPTY or higher since curproc 6688 * is in the zone. 6689 */ 6690 ASSERT(zone_status_get(zone) < ZONE_IS_EMPTY); 6691 if (zone_status_get(zone) > ZONE_IS_RUNNING) { 6692 /* 6693 * This zone is already on its way down. 6694 */ 6695 mutex_exit(&zone_status_lock); 6696 return (0); 6697 } 6698 /* 6699 * Prevent future zone_enter()s 6700 */ 6701 zone_status_set(zone, ZONE_IS_SHUTTING_DOWN); 6702 mutex_exit(&zone_status_lock); 6703 6704 /* 6705 * Kill everyone now and call zoneadmd later. 6706 * zone_ki_call_zoneadmd() will do a more thorough job of this 6707 * later. 6708 */ 6709 killall(zone->zone_id); 6710 /* 6711 * Now, create the thread to contact zoneadmd and do the rest of the 6712 * work. This thread can't be created in our zone otherwise 6713 * zone_destroy() would deadlock. 6714 */ 6715 zargp = kmem_zalloc(sizeof (*zargp), KM_SLEEP); 6716 zargp->arg.cmd = zcmd; 6717 zargp->arg.uniqid = zone->zone_uniqid; 6718 zargp->zone = zone; 6719 (void) strcpy(zargp->arg.locale, "C"); 6720 /* mdep was already copied in for us by uadmin */ 6721 if (mdep != NULL) 6722 (void) strlcpy(zargp->arg.bootbuf, mdep, 6723 sizeof (zargp->arg.bootbuf)); 6724 zone_hold(zone); 6725 6726 (void) thread_create(NULL, 0, zone_ki_call_zoneadmd, zargp, 0, &p0, 6727 TS_RUN, minclsyspri); 6728 exit(CLD_EXITED, 0); 6729 6730 return (EINVAL); 6731 } 6732 6733 /* 6734 * Entry point so kadmin(A_SHUTDOWN, ...) can set the global zone's 6735 * status to ZONE_IS_SHUTTING_DOWN. 6736 * 6737 * This function also shuts down all running zones to ensure that they won't 6738 * fork new processes. 6739 */ 6740 void 6741 zone_shutdown_global(void) 6742 { 6743 zone_t *current_zonep; 6744 6745 ASSERT(INGLOBALZONE(curproc)); 6746 mutex_enter(&zonehash_lock); 6747 mutex_enter(&zone_status_lock); 6748 6749 /* Modify the global zone's status first. */ 6750 ASSERT(zone_status_get(global_zone) == ZONE_IS_RUNNING); 6751 zone_status_set(global_zone, ZONE_IS_SHUTTING_DOWN); 6752 6753 /* 6754 * Now change the states of all running zones to ZONE_IS_SHUTTING_DOWN. 6755 * We don't mark all zones with ZONE_IS_SHUTTING_DOWN because doing so 6756 * could cause assertions to fail (e.g., assertions about a zone's 6757 * state during initialization, readying, or booting) or produce races. 6758 * We'll let threads continue to initialize and ready new zones: they'll 6759 * fail to boot the new zones when they see that the global zone is 6760 * shutting down. 6761 */ 6762 for (current_zonep = list_head(&zone_active); current_zonep != NULL; 6763 current_zonep = list_next(&zone_active, current_zonep)) { 6764 if (zone_status_get(current_zonep) == ZONE_IS_RUNNING) 6765 zone_status_set(current_zonep, ZONE_IS_SHUTTING_DOWN); 6766 } 6767 mutex_exit(&zone_status_lock); 6768 mutex_exit(&zonehash_lock); 6769 } 6770 6771 /* 6772 * Returns true if the named dataset is visible in the current zone. 6773 * The 'write' parameter is set to 1 if the dataset is also writable. 6774 */ 6775 int 6776 zone_dataset_visible(const char *dataset, int *write) 6777 { 6778 static int zfstype = -1; 6779 zone_dataset_t *zd; 6780 size_t len; 6781 zone_t *zone = curproc->p_zone; 6782 const char *name = NULL; 6783 vfs_t *vfsp = NULL; 6784 6785 if (dataset[0] == '\0') 6786 return (0); 6787 6788 /* 6789 * Walk the list once, looking for datasets which match exactly, or 6790 * specify a dataset underneath an exported dataset. If found, return 6791 * true and note that it is writable. 6792 */ 6793 for (zd = list_head(&zone->zone_datasets); zd != NULL; 6794 zd = list_next(&zone->zone_datasets, zd)) { 6795 6796 len = strlen(zd->zd_dataset); 6797 if (strlen(dataset) >= len && 6798 bcmp(dataset, zd->zd_dataset, len) == 0 && 6799 (dataset[len] == '\0' || dataset[len] == '/' || 6800 dataset[len] == '@')) { 6801 if (write) 6802 *write = 1; 6803 return (1); 6804 } 6805 } 6806 6807 /* 6808 * Walk the list a second time, searching for datasets which are parents 6809 * of exported datasets. These should be visible, but read-only. 6810 * 6811 * Note that we also have to support forms such as 'pool/dataset/', with 6812 * a trailing slash. 6813 */ 6814 for (zd = list_head(&zone->zone_datasets); zd != NULL; 6815 zd = list_next(&zone->zone_datasets, zd)) { 6816 6817 len = strlen(dataset); 6818 if (dataset[len - 1] == '/') 6819 len--; /* Ignore trailing slash */ 6820 if (len < strlen(zd->zd_dataset) && 6821 bcmp(dataset, zd->zd_dataset, len) == 0 && 6822 zd->zd_dataset[len] == '/') { 6823 if (write) 6824 *write = 0; 6825 return (1); 6826 } 6827 } 6828 6829 /* 6830 * We reach here if the given dataset is not found in the zone_dataset 6831 * list. Check if this dataset was added as a filesystem (ie. "add fs") 6832 * instead of delegation. For this we search for the dataset in the 6833 * zone_vfslist of this zone. If found, return true and note that it is 6834 * not writable. 6835 */ 6836 6837 /* 6838 * Initialize zfstype if it is not initialized yet. 6839 */ 6840 if (zfstype == -1) { 6841 struct vfssw *vswp = vfs_getvfssw("zfs"); 6842 zfstype = vswp - vfssw; 6843 vfs_unrefvfssw(vswp); 6844 } 6845 6846 vfs_list_read_lock(); 6847 vfsp = zone->zone_vfslist; 6848 do { 6849 ASSERT(vfsp); 6850 if (vfsp->vfs_fstype == zfstype) { 6851 name = refstr_value(vfsp->vfs_resource); 6852 6853 /* 6854 * Check if we have an exact match. 6855 */ 6856 if (strcmp(dataset, name) == 0) { 6857 vfs_list_unlock(); 6858 if (write) 6859 *write = 0; 6860 return (1); 6861 } 6862 /* 6863 * We need to check if we are looking for parents of 6864 * a dataset. These should be visible, but read-only. 6865 */ 6866 len = strlen(dataset); 6867 if (dataset[len - 1] == '/') 6868 len--; 6869 6870 if (len < strlen(name) && 6871 bcmp(dataset, name, len) == 0 && name[len] == '/') { 6872 vfs_list_unlock(); 6873 if (write) 6874 *write = 0; 6875 return (1); 6876 } 6877 } 6878 vfsp = vfsp->vfs_zone_next; 6879 } while (vfsp != zone->zone_vfslist); 6880 6881 vfs_list_unlock(); 6882 return (0); 6883 } 6884 6885 /* 6886 * zone_find_by_any_path() - 6887 * 6888 * kernel-private routine similar to zone_find_by_path(), but which 6889 * effectively compares against zone paths rather than zonerootpath 6890 * (i.e., the last component of zonerootpaths, which should be "root/", 6891 * are not compared.) This is done in order to accurately identify all 6892 * paths, whether zone-visible or not, including those which are parallel 6893 * to /root/, such as /dev/, /home/, etc... 6894 * 6895 * If the specified path does not fall under any zone path then global 6896 * zone is returned. 6897 * 6898 * The treat_abs parameter indicates whether the path should be treated as 6899 * an absolute path although it does not begin with "/". (This supports 6900 * nfs mount syntax such as host:any/path.) 6901 * 6902 * The caller is responsible for zone_rele of the returned zone. 6903 */ 6904 zone_t * 6905 zone_find_by_any_path(const char *path, boolean_t treat_abs) 6906 { 6907 zone_t *zone; 6908 int path_offset = 0; 6909 6910 if (path == NULL) { 6911 zone_hold(global_zone); 6912 return (global_zone); 6913 } 6914 6915 if (*path != '/') { 6916 ASSERT(treat_abs); 6917 path_offset = 1; 6918 } 6919 6920 mutex_enter(&zonehash_lock); 6921 for (zone = list_head(&zone_active); zone != NULL; 6922 zone = list_next(&zone_active, zone)) { 6923 char *c; 6924 size_t pathlen; 6925 char *rootpath_start; 6926 6927 if (zone == global_zone) /* skip global zone */ 6928 continue; 6929 6930 /* scan backwards to find start of last component */ 6931 c = zone->zone_rootpath + zone->zone_rootpathlen - 2; 6932 do { 6933 c--; 6934 } while (*c != '/'); 6935 6936 pathlen = c - zone->zone_rootpath + 1 - path_offset; 6937 rootpath_start = (zone->zone_rootpath + path_offset); 6938 if (strncmp(path, rootpath_start, pathlen) == 0) 6939 break; 6940 } 6941 if (zone == NULL) 6942 zone = global_zone; 6943 zone_hold(zone); 6944 mutex_exit(&zonehash_lock); 6945 return (zone); 6946 } 6947 6948 /* 6949 * Finds a zone_dl_t with the given linkid in the given zone. Returns the 6950 * zone_dl_t pointer if found, and NULL otherwise. 6951 */ 6952 static zone_dl_t * 6953 zone_find_dl(zone_t *zone, datalink_id_t linkid) 6954 { 6955 zone_dl_t *zdl; 6956 6957 ASSERT(mutex_owned(&zone->zone_lock)); 6958 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL; 6959 zdl = list_next(&zone->zone_dl_list, zdl)) { 6960 if (zdl->zdl_id == linkid) 6961 break; 6962 } 6963 return (zdl); 6964 } 6965 6966 static boolean_t 6967 zone_dl_exists(zone_t *zone, datalink_id_t linkid) 6968 { 6969 boolean_t exists; 6970 6971 mutex_enter(&zone->zone_lock); 6972 exists = (zone_find_dl(zone, linkid) != NULL); 6973 mutex_exit(&zone->zone_lock); 6974 return (exists); 6975 } 6976 6977 /* 6978 * Add an data link name for the zone. 6979 */ 6980 static int 6981 zone_add_datalink(zoneid_t zoneid, datalink_id_t linkid) 6982 { 6983 zone_dl_t *zdl; 6984 zone_t *zone; 6985 zone_t *thiszone; 6986 6987 if ((thiszone = zone_find_by_id(zoneid)) == NULL) 6988 return (set_errno(ENXIO)); 6989 6990 /* Verify that the datalink ID doesn't already belong to a zone. */ 6991 mutex_enter(&zonehash_lock); 6992 for (zone = list_head(&zone_active); zone != NULL; 6993 zone = list_next(&zone_active, zone)) { 6994 if (zone_dl_exists(zone, linkid)) { 6995 mutex_exit(&zonehash_lock); 6996 zone_rele(thiszone); 6997 return (set_errno((zone == thiszone) ? EEXIST : EPERM)); 6998 } 6999 } 7000 7001 zdl = kmem_zalloc(sizeof (*zdl), KM_SLEEP); 7002 zdl->zdl_id = linkid; 7003 zdl->zdl_net = NULL; 7004 mutex_enter(&thiszone->zone_lock); 7005 list_insert_head(&thiszone->zone_dl_list, zdl); 7006 mutex_exit(&thiszone->zone_lock); 7007 mutex_exit(&zonehash_lock); 7008 zone_rele(thiszone); 7009 return (0); 7010 } 7011 7012 static int 7013 zone_remove_datalink(zoneid_t zoneid, datalink_id_t linkid) 7014 { 7015 zone_dl_t *zdl; 7016 zone_t *zone; 7017 int err = 0; 7018 7019 if ((zone = zone_find_by_id(zoneid)) == NULL) 7020 return (set_errno(EINVAL)); 7021 7022 mutex_enter(&zone->zone_lock); 7023 if ((zdl = zone_find_dl(zone, linkid)) == NULL) { 7024 err = ENXIO; 7025 } else { 7026 list_remove(&zone->zone_dl_list, zdl); 7027 nvlist_free(zdl->zdl_net); 7028 kmem_free(zdl, sizeof (zone_dl_t)); 7029 } 7030 mutex_exit(&zone->zone_lock); 7031 zone_rele(zone); 7032 return (err == 0 ? 0 : set_errno(err)); 7033 } 7034 7035 /* 7036 * Using the zoneidp as ALL_ZONES, we can lookup which zone has been assigned 7037 * the linkid. Otherwise we just check if the specified zoneidp has been 7038 * assigned the supplied linkid. 7039 */ 7040 int 7041 zone_check_datalink(zoneid_t *zoneidp, datalink_id_t linkid) 7042 { 7043 zone_t *zone; 7044 int err = ENXIO; 7045 7046 if (*zoneidp != ALL_ZONES) { 7047 if ((zone = zone_find_by_id(*zoneidp)) != NULL) { 7048 if (zone_dl_exists(zone, linkid)) 7049 err = 0; 7050 zone_rele(zone); 7051 } 7052 return (err); 7053 } 7054 7055 mutex_enter(&zonehash_lock); 7056 for (zone = list_head(&zone_active); zone != NULL; 7057 zone = list_next(&zone_active, zone)) { 7058 if (zone_dl_exists(zone, linkid)) { 7059 *zoneidp = zone->zone_id; 7060 err = 0; 7061 break; 7062 } 7063 } 7064 mutex_exit(&zonehash_lock); 7065 return (err); 7066 } 7067 7068 /* 7069 * Get the list of datalink IDs assigned to a zone. 7070 * 7071 * On input, *nump is the number of datalink IDs that can fit in the supplied 7072 * idarray. Upon return, *nump is either set to the number of datalink IDs 7073 * that were placed in the array if the array was large enough, or to the 7074 * number of datalink IDs that the function needs to place in the array if the 7075 * array is too small. 7076 */ 7077 static int 7078 zone_list_datalink(zoneid_t zoneid, int *nump, datalink_id_t *idarray) 7079 { 7080 uint_t num, dlcount; 7081 zone_t *zone; 7082 zone_dl_t *zdl; 7083 datalink_id_t *idptr = idarray; 7084 7085 if (copyin(nump, &dlcount, sizeof (dlcount)) != 0) 7086 return (set_errno(EFAULT)); 7087 if ((zone = zone_find_by_id(zoneid)) == NULL) 7088 return (set_errno(ENXIO)); 7089 7090 num = 0; 7091 mutex_enter(&zone->zone_lock); 7092 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL; 7093 zdl = list_next(&zone->zone_dl_list, zdl)) { 7094 /* 7095 * If the list is bigger than what the caller supplied, just 7096 * count, don't do copyout. 7097 */ 7098 if (++num > dlcount) 7099 continue; 7100 if (copyout(&zdl->zdl_id, idptr, sizeof (*idptr)) != 0) { 7101 mutex_exit(&zone->zone_lock); 7102 zone_rele(zone); 7103 return (set_errno(EFAULT)); 7104 } 7105 idptr++; 7106 } 7107 mutex_exit(&zone->zone_lock); 7108 zone_rele(zone); 7109 7110 /* Increased or decreased, caller should be notified. */ 7111 if (num != dlcount) { 7112 if (copyout(&num, nump, sizeof (num)) != 0) 7113 return (set_errno(EFAULT)); 7114 } 7115 return (0); 7116 } 7117 7118 /* 7119 * Public interface for looking up a zone by zoneid. It's a customized version 7120 * for netstack_zone_create(). It can only be called from the zsd create 7121 * callbacks, since it doesn't have reference on the zone structure hence if 7122 * it is called elsewhere the zone could disappear after the zonehash_lock 7123 * is dropped. 7124 * 7125 * Furthermore it 7126 * 1. Doesn't check the status of the zone. 7127 * 2. It will be called even before zone_init is called, in that case the 7128 * address of zone0 is returned directly, and netstack_zone_create() 7129 * will only assign a value to zone0.zone_netstack, won't break anything. 7130 * 3. Returns without the zone being held. 7131 */ 7132 zone_t * 7133 zone_find_by_id_nolock(zoneid_t zoneid) 7134 { 7135 zone_t *zone; 7136 7137 mutex_enter(&zonehash_lock); 7138 if (zonehashbyid == NULL) 7139 zone = &zone0; 7140 else 7141 zone = zone_find_all_by_id(zoneid); 7142 mutex_exit(&zonehash_lock); 7143 return (zone); 7144 } 7145 7146 /* 7147 * Walk the datalinks for a given zone 7148 */ 7149 int 7150 zone_datalink_walk(zoneid_t zoneid, int (*cb)(datalink_id_t, void *), 7151 void *data) 7152 { 7153 zone_t *zone; 7154 zone_dl_t *zdl; 7155 datalink_id_t *idarray; 7156 uint_t idcount = 0; 7157 int i, ret = 0; 7158 7159 if ((zone = zone_find_by_id(zoneid)) == NULL) 7160 return (ENOENT); 7161 7162 /* 7163 * We first build an array of linkid's so that we can walk these and 7164 * execute the callback with the zone_lock dropped. 7165 */ 7166 mutex_enter(&zone->zone_lock); 7167 for (zdl = list_head(&zone->zone_dl_list); zdl != NULL; 7168 zdl = list_next(&zone->zone_dl_list, zdl)) { 7169 idcount++; 7170 } 7171 7172 if (idcount == 0) { 7173 mutex_exit(&zone->zone_lock); 7174 zone_rele(zone); 7175 return (0); 7176 } 7177 7178 idarray = kmem_alloc(sizeof (datalink_id_t) * idcount, KM_NOSLEEP); 7179 if (idarray == NULL) { 7180 mutex_exit(&zone->zone_lock); 7181 zone_rele(zone); 7182 return (ENOMEM); 7183 } 7184 7185 for (i = 0, zdl = list_head(&zone->zone_dl_list); zdl != NULL; 7186 i++, zdl = list_next(&zone->zone_dl_list, zdl)) { 7187 idarray[i] = zdl->zdl_id; 7188 } 7189 7190 mutex_exit(&zone->zone_lock); 7191 7192 for (i = 0; i < idcount && ret == 0; i++) { 7193 if ((ret = (*cb)(idarray[i], data)) != 0) 7194 break; 7195 } 7196 7197 zone_rele(zone); 7198 kmem_free(idarray, sizeof (datalink_id_t) * idcount); 7199 return (ret); 7200 } 7201 7202 static char * 7203 zone_net_type2name(int type) 7204 { 7205 switch (type) { 7206 case ZONE_NETWORK_ADDRESS: 7207 return (ZONE_NET_ADDRNAME); 7208 case ZONE_NETWORK_DEFROUTER: 7209 return (ZONE_NET_RTRNAME); 7210 default: 7211 return (NULL); 7212 } 7213 } 7214 7215 static int 7216 zone_set_network(zoneid_t zoneid, zone_net_data_t *znbuf) 7217 { 7218 zone_t *zone; 7219 zone_dl_t *zdl; 7220 nvlist_t *nvl; 7221 int err = 0; 7222 uint8_t *new = NULL; 7223 char *nvname; 7224 int bufsize; 7225 datalink_id_t linkid = znbuf->zn_linkid; 7226 7227 if (secpolicy_zone_config(CRED()) != 0) 7228 return (set_errno(EPERM)); 7229 7230 if (zoneid == GLOBAL_ZONEID) 7231 return (set_errno(EINVAL)); 7232 7233 nvname = zone_net_type2name(znbuf->zn_type); 7234 bufsize = znbuf->zn_len; 7235 new = znbuf->zn_val; 7236 if (nvname == NULL) 7237 return (set_errno(EINVAL)); 7238 7239 if ((zone = zone_find_by_id(zoneid)) == NULL) { 7240 return (set_errno(EINVAL)); 7241 } 7242 7243 mutex_enter(&zone->zone_lock); 7244 if ((zdl = zone_find_dl(zone, linkid)) == NULL) { 7245 err = ENXIO; 7246 goto done; 7247 } 7248 if ((nvl = zdl->zdl_net) == NULL) { 7249 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP)) { 7250 err = ENOMEM; 7251 goto done; 7252 } else { 7253 zdl->zdl_net = nvl; 7254 } 7255 } 7256 if (nvlist_exists(nvl, nvname)) { 7257 err = EINVAL; 7258 goto done; 7259 } 7260 err = nvlist_add_uint8_array(nvl, nvname, new, bufsize); 7261 ASSERT(err == 0); 7262 done: 7263 mutex_exit(&zone->zone_lock); 7264 zone_rele(zone); 7265 if (err != 0) 7266 return (set_errno(err)); 7267 else 7268 return (0); 7269 } 7270 7271 static int 7272 zone_get_network(zoneid_t zoneid, zone_net_data_t *znbuf) 7273 { 7274 zone_t *zone; 7275 zone_dl_t *zdl; 7276 nvlist_t *nvl; 7277 uint8_t *ptr; 7278 uint_t psize; 7279 int err = 0; 7280 char *nvname; 7281 int bufsize; 7282 void *buf; 7283 datalink_id_t linkid = znbuf->zn_linkid; 7284 7285 if (zoneid == GLOBAL_ZONEID) 7286 return (set_errno(EINVAL)); 7287 7288 nvname = zone_net_type2name(znbuf->zn_type); 7289 bufsize = znbuf->zn_len; 7290 buf = znbuf->zn_val; 7291 7292 if (nvname == NULL) 7293 return (set_errno(EINVAL)); 7294 if ((zone = zone_find_by_id(zoneid)) == NULL) 7295 return (set_errno(EINVAL)); 7296 7297 mutex_enter(&zone->zone_lock); 7298 if ((zdl = zone_find_dl(zone, linkid)) == NULL) { 7299 err = ENXIO; 7300 goto done; 7301 } 7302 if ((nvl = zdl->zdl_net) == NULL || !nvlist_exists(nvl, nvname)) { 7303 err = ENOENT; 7304 goto done; 7305 } 7306 err = nvlist_lookup_uint8_array(nvl, nvname, &ptr, &psize); 7307 ASSERT(err == 0); 7308 7309 if (psize > bufsize) { 7310 err = ENOBUFS; 7311 goto done; 7312 } 7313 znbuf->zn_len = psize; 7314 bcopy(ptr, buf, psize); 7315 done: 7316 mutex_exit(&zone->zone_lock); 7317 zone_rele(zone); 7318 if (err != 0) 7319 return (set_errno(err)); 7320 else 7321 return (0); 7322 } 7323