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Clean up merge problems with illumos#11083 (nfs-zone)
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--- old/usr/src/uts/common/sys/zone.h
+++ new/usr/src/uts/common/sys/zone.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 24 * Copyright 2014 Igor Kozhukhov <ikozhukhov@gmail.com>.
25 25 * Copyright 2019 Nexenta Systems, Inc. All rights reserved.
26 26 * Copyright 2020 Joyent, Inc.
27 27 */
28 28
29 29 #ifndef _SYS_ZONE_H
30 30 #define _SYS_ZONE_H
31 31
32 32 #include <sys/types.h>
33 33 #include <sys/param.h>
34 34 #include <sys/tsol/label.h>
35 35 #include <sys/uadmin.h>
36 36 #include <netinet/in.h>
37 37
38 38 #ifdef _KERNEL
39 39 /*
40 40 * Many includes are kernel-only to reduce namespace pollution of
41 41 * userland applications.
42 42 */
43 43 #include <sys/mutex.h>
44 44 #include <sys/rctl.h>
45 45 #include <sys/ipc_rctl.h>
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46 46 #include <sys/pset.h>
47 47 #include <sys/cred.h>
48 48 #include <sys/netstack.h>
49 49 #include <sys/ksynch.h>
50 50 #include <sys/socket_impl.h>
51 51 #include <sys/secflags.h>
52 52 #include <sys/cpu_uarray.h>
53 53 #include <sys/nvpair.h>
54 54 #include <sys/list.h>
55 55 #include <sys/loadavg.h>
56 +#include <sys/vnode.h>
56 57 #endif /* _KERNEL */
57 58
58 59 #ifdef __cplusplus
59 60 extern "C" {
60 61 #endif
61 62
62 63 /*
63 64 * NOTE
64 65 *
65 66 * The contents of this file are private to the implementation of
66 67 * illumos and are subject to change at any time without notice.
67 68 * Applications and drivers using these interfaces may fail to
68 69 * run on future releases.
69 70 */
70 71
71 72 /* Available both in kernel and for user space */
72 73
73 74 /*
74 75 * zone id restrictions and special ids.
75 76 * See 'maxzones' for run-time zone limit.
76 77 *
77 78 * The current 8k value for MAX_ZONES was originally derived from the virtual
78 79 * interface limit in IP when "shared-stack" was the only supported networking
79 80 * for zones. The virtual interface limit is the number of addresses allowed
80 81 * on an interface (see MAX_ADDRS_PER_IF). Even with exclusive stacks, an 8k
81 82 * zone limit is still a reasonable choice at this time, given other limits
82 83 * within the kernel. Since we only support 8192 zones (which includes GZ),
83 84 * there is no point in allowing MAX_ZONEID > 8k.
84 85 */
85 86 #define MAX_ZONES 8192
86 87 #define MAX_ZONEID (MAX_ZONES - 1)
87 88 #define MIN_USERZONEID 1 /* lowest user-creatable zone ID */
88 89 #define MIN_ZONEID 0 /* minimum zone ID on system */
89 90 #define GLOBAL_ZONEID 0
90 91 #define ZONEID_WIDTH 4 /* for printf */
91 92
92 93 /*
93 94 * Special zoneid_t token to refer to all zones.
94 95 */
95 96 #define ALL_ZONES (-1)
96 97
97 98 /* system call subcodes */
98 99 #define ZONE_CREATE 0
99 100 #define ZONE_DESTROY 1
100 101 #define ZONE_GETATTR 2
101 102 #define ZONE_ENTER 3
102 103 #define ZONE_LIST 4
103 104 #define ZONE_SHUTDOWN 5
104 105 #define ZONE_LOOKUP 6
105 106 #define ZONE_BOOT 7
106 107 #define ZONE_VERSION 8
107 108 #define ZONE_SETATTR 9
108 109 #define ZONE_ADD_DATALINK 10
109 110 #define ZONE_DEL_DATALINK 11
110 111 #define ZONE_CHECK_DATALINK 12
111 112 #define ZONE_LIST_DATALINK 13
112 113
113 114 /* zone attributes */
114 115 #define ZONE_ATTR_ROOT 1
115 116 #define ZONE_ATTR_NAME 2
116 117 #define ZONE_ATTR_STATUS 3
117 118 #define ZONE_ATTR_PRIVSET 4
118 119 #define ZONE_ATTR_UNIQID 5
119 120 #define ZONE_ATTR_POOLID 6
120 121 #define ZONE_ATTR_INITPID 7
121 122 #define ZONE_ATTR_SLBL 8
122 123 #define ZONE_ATTR_INITNAME 9
123 124 #define ZONE_ATTR_BOOTARGS 10
124 125 #define ZONE_ATTR_BRAND 11
125 126 #define ZONE_ATTR_SCHED_CLASS 12
126 127 #define ZONE_ATTR_FLAGS 13
127 128 #define ZONE_ATTR_HOSTID 14
128 129 #define ZONE_ATTR_FS_ALLOWED 15
129 130 #define ZONE_ATTR_NETWORK 16
130 131 #define ZONE_ATTR_DID 17
131 132 #define ZONE_ATTR_INITNORESTART 18
132 133 #define ZONE_ATTR_APP_SVC_CT 19
133 134 #define ZONE_ATTR_SCHED_FIXEDHI 20
134 135 #define ZONE_ATTR_SECFLAGS 21
135 136 #define ZONE_ATTR_INITRESTART0 22
136 137 #define ZONE_ATTR_INITREBOOT 23
137 138
138 139 /* Start of the brand-specific attribute namespace */
139 140 #define ZONE_ATTR_BRAND_ATTRS 32768
140 141
141 142 #define ZONE_FS_ALLOWED_MAX 1024
142 143
143 144 #define ZONE_EVENT_CHANNEL "com.sun:zones:status"
144 145 #define ZONE_EVENT_STATUS_CLASS "status"
145 146 #define ZONE_EVENT_STATUS_SUBCLASS "change"
146 147
147 148 #define ZONE_EVENT_UNINITIALIZED "uninitialized"
148 149 #define ZONE_EVENT_INITIALIZED "initialized"
149 150 #define ZONE_EVENT_READY "ready"
150 151 #define ZONE_EVENT_RUNNING "running"
151 152 #define ZONE_EVENT_SHUTTING_DOWN "shutting_down"
152 153 #define ZONE_EVENT_FREE "free"
153 154
154 155 #define ZONE_CB_NAME "zonename"
155 156 #define ZONE_CB_NEWSTATE "newstate"
156 157 #define ZONE_CB_OLDSTATE "oldstate"
157 158 #define ZONE_CB_RESTARTS "restarts"
158 159 #define ZONE_CB_TIMESTAMP "when"
159 160 #define ZONE_CB_ZONEID "zoneid"
160 161
161 162 #define ZONE_EVENT_INIT_CLASS "init"
162 163 #define ZONE_EVENT_INIT_RESTART_SC "restart"
163 164
164 165 /*
165 166 * Exit values that may be returned by scripts or programs invoked by various
166 167 * zone commands.
167 168 *
168 169 * These are defined as:
169 170 *
170 171 * ZONE_SUBPROC_OK
171 172 * ===============
172 173 * The subprocess completed successfully.
173 174 *
174 175 * ZONE_SUBPROC_USAGE
175 176 * ==================
176 177 * The subprocess failed with a usage message, or a usage message should
177 178 * be output in its behalf.
178 179 *
179 180 * ZONE_SUBPROC_NOTCOMPLETE
180 181 * ========================
181 182 * The subprocess did not complete, but the actions performed by the
182 183 * subprocess require no recovery actions by the user.
183 184 *
184 185 * For example, if the subprocess were called by "zoneadm install," the
185 186 * installation of the zone did not succeed but the user need not perform
186 187 * a "zoneadm uninstall" before attempting another install.
187 188 *
188 189 * ZONE_SUBPROC_FATAL
189 190 * ==================
190 191 * The subprocess failed in a fatal manner, usually one that will require
191 192 * some type of recovery action by the user.
192 193 *
193 194 * For example, if the subprocess were called by "zoneadm install," the
194 195 * installation of the zone did not succeed and the user will need to
195 196 * perform a "zoneadm uninstall" before another install attempt is
196 197 * possible.
197 198 *
198 199 * The non-success exit values are large to avoid accidental collision
199 200 * with values used internally by some commands (e.g. "Z_ERR" and
200 201 * "Z_USAGE" as used by zoneadm.)
201 202 */
202 203 #define ZONE_SUBPROC_OK 0
203 204 #define ZONE_SUBPROC_USAGE 253
204 205 #define ZONE_SUBPROC_NOTCOMPLETE 254
205 206 #define ZONE_SUBPROC_FATAL 255
206 207
207 208 #ifdef _SYSCALL32
208 209 typedef struct {
209 210 caddr32_t zone_name;
210 211 caddr32_t zone_root;
211 212 caddr32_t zone_privs;
212 213 size32_t zone_privssz;
213 214 caddr32_t rctlbuf;
214 215 size32_t rctlbufsz;
215 216 caddr32_t extended_error;
216 217 caddr32_t zfsbuf;
217 218 size32_t zfsbufsz;
218 219 int match; /* match level */
219 220 uint32_t doi; /* DOI for label */
220 221 caddr32_t label; /* label associated with zone */
221 222 int flags;
222 223 zoneid_t zoneid; /* requested zoneid */
223 224 } zone_def32;
224 225 #endif
225 226 typedef struct {
226 227 const char *zone_name;
227 228 const char *zone_root;
228 229 const struct priv_set *zone_privs;
229 230 size_t zone_privssz;
230 231 const char *rctlbuf;
231 232 size_t rctlbufsz;
232 233 int *extended_error;
233 234 const char *zfsbuf;
234 235 size_t zfsbufsz;
235 236 int match; /* match level */
236 237 uint32_t doi; /* DOI for label */
237 238 const bslabel_t *label; /* label associated with zone */
238 239 int flags;
239 240 zoneid_t zoneid; /* requested zoneid */
240 241 } zone_def;
241 242
242 243 /* extended error information */
243 244 #define ZE_UNKNOWN 0 /* No extended error info */
244 245 #define ZE_CHROOTED 1 /* tried to zone_create from chroot */
245 246 #define ZE_AREMOUNTS 2 /* there are mounts within the zone */
246 247 #define ZE_LABELINUSE 3 /* label is already in use by some other zone */
247 248
248 249 /*
249 250 * zone_status values
250 251 *
251 252 * You must modify zone_status_names in mdb(1M)'s genunix module
252 253 * (genunix/zone.c) when you modify this enum.
253 254 */
254 255 typedef enum {
255 256 ZONE_IS_UNINITIALIZED = 0,
256 257 ZONE_IS_INITIALIZED,
257 258 ZONE_IS_READY,
258 259 ZONE_IS_BOOTING,
259 260 ZONE_IS_RUNNING,
260 261 ZONE_IS_SHUTTING_DOWN,
261 262 ZONE_IS_EMPTY,
262 263 ZONE_IS_DOWN,
263 264 ZONE_IS_DYING,
264 265 ZONE_IS_DEAD,
265 266 ZONE_IS_FREE /* transient state for zone sysevent */
266 267 } zone_status_t;
267 268 #define ZONE_MIN_STATE ZONE_IS_UNINITIALIZED
268 269 #define ZONE_MAX_STATE ZONE_IS_DEAD
269 270
270 271 /*
271 272 * Valid commands which may be issued by zoneadm to zoneadmd. The kernel also
272 273 * communicates with zoneadmd, but only uses Z_REBOOT and Z_HALT.
273 274 */
274 275 typedef enum zone_cmd {
275 276 Z_READY, Z_BOOT, Z_FORCEBOOT, Z_REBOOT, Z_HALT, Z_NOTE_UNINSTALLING,
276 277 Z_MOUNT, Z_FORCEMOUNT, Z_UNMOUNT, Z_SHUTDOWN
277 278 } zone_cmd_t;
278 279
279 280 /*
280 281 * The structure of a request to zoneadmd.
281 282 */
282 283 typedef struct zone_cmd_arg {
283 284 uint64_t uniqid; /* unique "generation number" */
284 285 zone_cmd_t cmd; /* requested action */
285 286 int status; /* init status on shutdown */
286 287 uint32_t debug; /* enable brand hook debug */
287 288 char locale[MAXPATHLEN]; /* locale in which to render messages */
288 289 char bootbuf[BOOTARGS_MAX]; /* arguments passed to zone_boot() */
289 290 /* Needed for 32/64 zoneadm -> zoneadmd door arg size check. */
290 291 int pad;
291 292 } zone_cmd_arg_t;
292 293
293 294 /*
294 295 * Structure of zoneadmd's response to a request. A NULL return value means
295 296 * the caller should attempt to restart zoneadmd and retry.
296 297 */
297 298 typedef struct zone_cmd_rval {
298 299 int rval; /* return value of request */
299 300 char errbuf[1]; /* variable-sized buffer containing error messages */
300 301 } zone_cmd_rval_t;
301 302
302 303 /*
303 304 * The zone support infrastructure uses the zone name as a component
304 305 * of unix domain (AF_UNIX) sockets, which are limited to 108 characters
305 306 * in length, so ZONENAME_MAX is limited by that.
306 307 */
307 308 #define ZONENAME_MAX 64
308 309
309 310 #define GLOBAL_ZONENAME "global"
310 311
311 312 /*
312 313 * Extended Regular expression (see regex(5)) which matches all valid zone
313 314 * names.
314 315 */
315 316 #define ZONENAME_REGEXP "[a-zA-Z0-9][-_.a-zA-Z0-9]{0,62}"
316 317
317 318 /*
318 319 * Where the zones support infrastructure places temporary files.
319 320 */
320 321 #define ZONES_TMPDIR "/var/run/zones"
321 322
322 323 /*
323 324 * The path to the door used by clients to communicate with zoneadmd.
324 325 */
325 326 #define ZONE_DOOR_PATH ZONES_TMPDIR "/%s.zoneadmd_door"
326 327
327 328
328 329 /* zone_flags */
329 330 /*
330 331 * Threads that read or write the following flag must hold zone_lock.
331 332 */
332 333 #define ZF_REFCOUNTS_LOGGED 0x1 /* a thread logged the zone's refs */
333 334
334 335 /*
335 336 * The following threads are set when the zone is created and never changed.
336 337 * Threads that test for these flags don't have to hold zone_lock.
337 338 */
338 339 #define ZF_HASHED_LABEL 0x2 /* zone has a unique label */
339 340 #define ZF_IS_SCRATCH 0x4 /* scratch zone */
340 341 #define ZF_NET_EXCL 0x8 /* Zone has an exclusive IP stack */
341 342
342 343
343 344 /* zone_create flags */
344 345 #define ZCF_NET_EXCL 0x1 /* Create a zone with exclusive IP */
345 346
346 347 /* zone network properties */
347 348 #define ZONE_NETWORK_ADDRESS 1
348 349 #define ZONE_NETWORK_DEFROUTER 2
349 350
350 351 #define ZONE_NET_ADDRNAME "address"
351 352 #define ZONE_NET_RTRNAME "route"
352 353
353 354 typedef struct zone_net_data {
354 355 int zn_type;
355 356 int zn_len;
356 357 datalink_id_t zn_linkid;
357 358 uint8_t zn_val[1];
358 359 } zone_net_data_t;
359 360
360 361
361 362 #ifdef _KERNEL
362 363
363 364 #define GLOBAL_ZONEUNIQID 0 /* uniqid of the global zone */
364 365
365 366 /*
366 367 * Indexes into ->zone_ustate array, summing the micro state of all threads in a
367 368 * particular zone.
368 369 */
369 370 #define ZONE_USTATE_STIME (0)
370 371 #define ZONE_USTATE_UTIME (1)
371 372 #define ZONE_USTATE_WTIME (2)
372 373 #define ZONE_USTATE_MAX (3)
373 374
374 375 struct pool;
375 376 struct brand;
376 377
377 378 /*
378 379 * Each of these constants identifies a kernel subsystem that acquires and
379 380 * releases zone references. Each subsystem that invokes
380 381 * zone_hold_ref() and zone_rele_ref() should specify the
381 382 * zone_ref_subsys_t constant associated with the subsystem. Tracked holds
382 383 * help users and developers quickly identify subsystems that stall zone
383 384 * shutdowns indefinitely.
384 385 *
385 386 * NOTE: You must modify zone_ref_subsys_names in usr/src/uts/common/os/zone.c
386 387 * when you modify this enumeration.
387 388 */
388 389 typedef enum zone_ref_subsys {
389 390 ZONE_REF_NFS, /* NFS */
390 391 ZONE_REF_NFSV4, /* NFSv4 */
391 392 ZONE_REF_SMBFS, /* SMBFS */
392 393 ZONE_REF_MNTFS, /* MNTFS */
393 394 ZONE_REF_LOFI, /* LOFI devices */
394 395 ZONE_REF_VFS, /* VFS infrastructure */
395 396 ZONE_REF_IPC, /* IPC infrastructure */
396 397 ZONE_REF_NUM_SUBSYS /* This must be the last entry. */
397 398 } zone_ref_subsys_t;
398 399
399 400 /*
400 401 * zone_ref represents a general-purpose references to a zone. Each zone's
401 402 * references are linked into the zone's zone_t::zone_ref_list. This allows
402 403 * debuggers to walk zones' references.
403 404 */
404 405 typedef struct zone_ref {
405 406 struct zone *zref_zone; /* the zone to which the reference refers */
406 407 list_node_t zref_linkage; /* linkage for zone_t::zone_ref_list */
407 408 } zone_ref_t;
408 409
409 410 /*
410 411 * Structure to record list of ZFS datasets exported to a zone.
411 412 */
412 413 typedef struct zone_dataset {
413 414 char *zd_dataset;
414 415 list_node_t zd_linkage;
415 416 } zone_dataset_t;
416 417
417 418 /*
418 419 * structure for rctl zone kstats
419 420 */
420 421 typedef struct zone_kstat {
421 422 kstat_named_t zk_zonename;
422 423 kstat_named_t zk_usage;
423 424 kstat_named_t zk_value;
424 425 } zone_kstat_t;
425 426
426 427 struct cpucap;
427 428
428 429 typedef struct {
429 430 hrtime_t cycle_start;
430 431 uint_t cycle_cnt;
431 432 hrtime_t zone_avg_cnt;
432 433 } sys_zio_cntr_t;
433 434
434 435 typedef struct {
435 436 kstat_named_t zv_zonename;
436 437 kstat_named_t zv_nread;
437 438 kstat_named_t zv_reads;
438 439 kstat_named_t zv_rtime;
439 440 kstat_named_t zv_rlentime;
440 441 kstat_named_t zv_rcnt;
441 442 kstat_named_t zv_nwritten;
442 443 kstat_named_t zv_writes;
443 444 kstat_named_t zv_wtime;
444 445 kstat_named_t zv_wlentime;
445 446 kstat_named_t zv_wcnt;
446 447 kstat_named_t zv_10ms_ops;
447 448 kstat_named_t zv_100ms_ops;
448 449 kstat_named_t zv_1s_ops;
449 450 kstat_named_t zv_10s_ops;
450 451 kstat_named_t zv_delay_cnt;
451 452 kstat_named_t zv_delay_time;
452 453 } zone_vfs_kstat_t;
453 454
454 455 typedef struct {
455 456 kstat_named_t zz_zonename;
456 457 kstat_named_t zz_nread;
457 458 kstat_named_t zz_reads;
458 459 kstat_named_t zz_rtime;
459 460 kstat_named_t zz_rlentime;
460 461 kstat_named_t zz_nwritten;
461 462 kstat_named_t zz_writes;
462 463 kstat_named_t zz_waittime;
463 464 } zone_zfs_kstat_t;
464 465
465 466 typedef struct {
466 467 kstat_named_t zm_zonename;
467 468 kstat_named_t zm_rss;
468 469 kstat_named_t zm_phys_cap;
469 470 kstat_named_t zm_swap;
470 471 kstat_named_t zm_swap_cap;
471 472 kstat_named_t zm_nover;
472 473 kstat_named_t zm_pagedout;
473 474 kstat_named_t zm_pgpgin;
474 475 kstat_named_t zm_anonpgin;
475 476 kstat_named_t zm_execpgin;
476 477 kstat_named_t zm_fspgin;
477 478 kstat_named_t zm_anon_alloc_fail;
478 479 kstat_named_t zm_pf_throttle;
479 480 kstat_named_t zm_pf_throttle_usec;
480 481 } zone_mcap_kstat_t;
481 482
482 483 typedef struct {
483 484 kstat_named_t zm_zonename; /* full name, kstat truncates name */
484 485 kstat_named_t zm_utime;
485 486 kstat_named_t zm_stime;
486 487 kstat_named_t zm_wtime;
487 488 kstat_named_t zm_avenrun1;
488 489 kstat_named_t zm_avenrun5;
489 490 kstat_named_t zm_avenrun15;
490 491 kstat_named_t zm_ffcap;
491 492 kstat_named_t zm_ffnoproc;
492 493 kstat_named_t zm_ffnomem;
493 494 kstat_named_t zm_ffmisc;
494 495 kstat_named_t zm_mfseglim;
495 496 kstat_named_t zm_nested_intp;
496 497 kstat_named_t zm_init_pid;
497 498 kstat_named_t zm_init_restarts;
498 499 kstat_named_t zm_boot_time;
499 500 } zone_misc_kstat_t;
500 501
501 502 typedef struct zone {
502 503 /*
503 504 * zone_name is never modified once set.
504 505 */
505 506 char *zone_name; /* zone's configuration name */
506 507 /*
507 508 * zone_nodename and zone_domain are never freed once allocated.
508 509 */
509 510 char *zone_nodename; /* utsname.nodename equivalent */
510 511 char *zone_domain; /* srpc_domain equivalent */
511 512 /*
512 513 * zone_hostid is used for per-zone hostid emulation.
513 514 * Currently it isn't modified after it's set (so no locks protect
514 515 * accesses), but that might have to change when we allow
515 516 * administrators to change running zones' properties.
516 517 *
517 518 * The global zone's zone_hostid must always be HW_INVALID_HOSTID so
518 519 * that zone_get_hostid() will function correctly.
519 520 */
520 521 uint32_t zone_hostid; /* zone's hostid, HW_INVALID_HOSTID */
521 522 /* if not emulated */
522 523 /*
523 524 * zone_lock protects the following fields of a zone_t:
524 525 * zone_ref
525 526 * zone_cred_ref
526 527 * zone_subsys_ref
527 528 * zone_ref_list
528 529 * zone_ntasks
529 530 * zone_flags
530 531 * zone_zsd
531 532 * zone_pfexecd
532 533 */
533 534 kmutex_t zone_lock;
534 535 /*
535 536 * zone_linkage is the zone's linkage into the active or
536 537 * death-row list. The field is protected by zonehash_lock.
537 538 */
538 539 list_node_t zone_linkage;
539 540 zoneid_t zone_id; /* ID of zone */
540 541 zoneid_t zone_did; /* persistent debug ID of zone */
541 542 uint_t zone_ref; /* count of zone_hold()s on zone */
542 543 uint_t zone_cred_ref; /* count of zone_hold_cred()s on zone */
543 544 /*
544 545 * Fixed-sized array of subsystem-specific reference counts
545 546 * The sum of all of the counts must be less than or equal to zone_ref.
546 547 * The array is indexed by the counts' subsystems' zone_ref_subsys_t
547 548 * constants.
548 549 */
549 550 uint_t zone_subsys_ref[ZONE_REF_NUM_SUBSYS];
550 551 list_t zone_ref_list; /* list of zone_ref_t structs */
551 552 /*
552 553 * zone_rootvp and zone_rootpath can never be modified once set.
553 554 */
554 555 struct vnode *zone_rootvp; /* zone's root vnode */
555 556 char *zone_rootpath; /* Path to zone's root + '/' */
556 557 ushort_t zone_flags; /* misc flags */
557 558 zone_status_t zone_status; /* protected by zone_status_lock */
558 559 uint_t zone_ntasks; /* number of tasks executing in zone */
559 560 kmutex_t zone_nlwps_lock; /* protects zone_nlwps, and *_nlwps */
560 561 /* counters in projects and tasks */
561 562 /* that are within the zone */
562 563 rctl_qty_t zone_nlwps; /* number of lwps in zone */
563 564 rctl_qty_t zone_nlwps_ctl; /* protected by zone_rctls->rcs_lock */
564 565 rctl_qty_t zone_shmmax; /* System V shared memory usage */
565 566 ipc_rqty_t zone_ipc; /* System V IPC id resource usage */
566 567
567 568 uint_t zone_rootpathlen; /* strlen(zone_rootpath) + 1 */
568 569 uint32_t zone_shares; /* FSS shares allocated to zone */
569 570 rctl_set_t *zone_rctls; /* zone-wide (zone.*) rctls */
570 571 kmutex_t zone_mem_lock; /* protects zone_locked_mem and */
571 572 /* kpd_locked_mem for all */
572 573 /* projects in zone. */
573 574 /* Also protects zone_max_swap */
574 575 /* grab after p_lock, before rcs_lock */
575 576 rctl_qty_t zone_locked_mem; /* bytes of locked memory in */
576 577 /* zone */
577 578 rctl_qty_t zone_locked_mem_ctl; /* Current locked memory */
578 579 /* limit. Protected by */
579 580 /* zone_rctls->rcs_lock */
580 581 rctl_qty_t zone_max_swap; /* bytes of swap reserved by zone */
581 582 rctl_qty_t zone_max_swap_ctl; /* current swap limit. */
582 583 /* Protected by */
583 584 /* zone_rctls->rcs_lock */
584 585 kmutex_t zone_rctl_lock; /* protects zone_max_lofi */
585 586 rctl_qty_t zone_max_lofi; /* lofi devs for zone */
586 587 rctl_qty_t zone_max_lofi_ctl; /* current lofi limit. */
587 588 /* Protected by */
588 589 /* zone_rctls->rcs_lock */
589 590 list_t zone_zsd; /* list of Zone-Specific Data values */
590 591 kcondvar_t zone_cv; /* used to signal state changes */
591 592 struct proc *zone_zsched; /* Dummy kernel "zsched" process */
592 593 pid_t zone_proc_initpid; /* pid of "init" for this zone */
593 594 uint_t zone_proc_init_restarts; /* times init restarted */
594 595 char *zone_initname; /* fs path to 'init' */
595 596 int zone_init_status; /* init's exit status */
596 597 int zone_boot_err; /* for zone_boot() if boot fails */
597 598 char *zone_bootargs; /* arguments passed via zone_boot() */
598 599 /*
599 600 * zone_kthreads is protected by zone_status_lock.
600 601 */
601 602 kthread_t *zone_kthreads; /* kernel threads in zone */
602 603 struct priv_set *zone_privset; /* limit set for zone */
603 604 /*
604 605 * zone_vfslist is protected by vfs_list_lock().
605 606 */
606 607 struct vfs *zone_vfslist; /* list of FS's mounted in zone */
607 608 uint64_t zone_uniqid; /* unique zone generation number */
608 609 struct cred *zone_kcred; /* kcred-like, zone-limited cred */
609 610 /*
610 611 * zone_pool is protected by pool_lock().
611 612 */
612 613 struct pool *zone_pool; /* pool the zone is bound to */
613 614 hrtime_t zone_pool_mod; /* last pool bind modification time */
614 615 /* zone_psetid is protected by cpu_lock */
615 616 psetid_t zone_psetid; /* pset the zone is bound to */
616 617
617 618 time_t zone_boot_time; /* Similar to boot_time */
618 619
619 620 /*
620 621 * The following two can be read without holding any locks. They are
621 622 * updated under cpu_lock.
622 623 */
623 624 int zone_ncpus; /* zone's idea of ncpus */
624 625 int zone_ncpus_online; /* zone's idea of ncpus_online */
625 626 /*
626 627 * List of ZFS datasets exported to this zone.
627 628 */
628 629 list_t zone_datasets; /* list of datasets */
629 630
630 631 ts_label_t *zone_slabel; /* zone sensitivity label */
631 632 int zone_match; /* require label match for packets */
632 633 tsol_mlp_list_t zone_mlps; /* MLPs on zone-private addresses */
633 634
634 635 boolean_t zone_restart_init; /* Restart init if it dies? */
635 636 boolean_t zone_reboot_on_init_exit; /* Reboot if init dies? */
636 637 boolean_t zone_restart_init_0; /* Restart only if it exits 0 */
637 638 boolean_t zone_setup_app_contract; /* setup contract? */
638 639 struct brand *zone_brand; /* zone's brand */
639 640 void *zone_brand_data; /* store brand specific data */
640 641 id_t zone_defaultcid; /* dflt scheduling class id */
641 642 boolean_t zone_fixed_hipri; /* fixed sched. hi prio */
642 643 kstat_t *zone_swapresv_kstat;
643 644 kstat_t *zone_lockedmem_kstat;
644 645 /*
645 646 * zone_dl_list is protected by zone_lock
646 647 */
647 648 list_t zone_dl_list;
648 649 netstack_t *zone_netstack;
649 650 struct cpucap *zone_cpucap; /* CPU caps data */
650 651
651 652 /*
652 653 * kstats and counters for VFS ops and bytes.
653 654 */
654 655 kmutex_t zone_vfs_lock; /* protects VFS statistics */
655 656 kstat_t *zone_vfs_ksp;
656 657 kstat_io_t zone_vfs_rwstats;
657 658 zone_vfs_kstat_t *zone_vfs_stats;
658 659
659 660 /*
660 661 * kstats for ZFS I/O ops and bytes.
661 662 */
662 663 kmutex_t zone_zfs_lock; /* protects ZFS statistics */
663 664 kstat_t *zone_zfs_ksp;
664 665 zone_zfs_kstat_t *zone_zfs_stats;
665 666
666 667 /*
667 668 * illumos Auditing per-zone audit context
668 669 */
669 670 struct au_kcontext *zone_audit_kctxt;
670 671 /*
671 672 * For private use by mntfs.
672 673 */
673 674 struct mntelem *zone_mntfs_db;
674 675 krwlock_t zone_mntfs_db_lock;
675 676
676 677 struct klpd_reg *zone_pfexecd;
677 678
678 679 char *zone_fs_allowed;
679 680 rctl_qty_t zone_nprocs; /* number of processes in the zone */
680 681 rctl_qty_t zone_nprocs_ctl; /* current limit protected by */
681 682 /* zone_rctls->rcs_lock */
682 683 kstat_t *zone_nprocs_kstat;
683 684
684 685 /*
685 686 * kstats and counters for physical memory capping.
686 687 */
687 688 kstat_t *zone_physmem_kstat;
688 689 kmutex_t zone_mcap_lock; /* protects mcap statistics */
689 690 kstat_t *zone_mcap_ksp;
690 691 zone_mcap_kstat_t *zone_mcap_stats;
691 692 uint64_t zone_pgpgin; /* pages paged in */
692 693 uint64_t zone_anonpgin; /* anon pages paged in */
693 694 uint64_t zone_execpgin; /* exec pages paged in */
694 695 uint64_t zone_fspgin; /* fs pages paged in */
695 696 uint64_t zone_anon_alloc_fail; /* cnt of anon alloc fails */
696 697
697 698 psecflags_t zone_secflags; /* default zone security-flags */
698 699
699 700 /*
700 701 * Misc. kstats and counters for zone cpu-usage aggregation.
701 702 */
702 703 kmutex_t zone_misc_lock; /* protects misc statistics */
703 704 kstat_t *zone_misc_ksp;
704 705 zone_misc_kstat_t *zone_misc_stats;
705 706 /* Accumulated microstate for all threads in this zone. */
706 707 cpu_uarray_t *zone_ustate;
707 708 /* fork-fail kstat tracking */
708 709 uint32_t zone_ffcap; /* hit an rctl cap */
709 710 uint32_t zone_ffnoproc; /* get proc/lwp error */
710 711 uint32_t zone_ffnomem; /* as_dup/memory error */
711 712 uint32_t zone_ffmisc; /* misc. other error */
712 713
713 714 uint32_t zone_mfseglim; /* map failure (# segs limit) */
714 715
715 716 uint32_t zone_nested_intp; /* nested interp. kstat */
716 717
717 718 struct loadavg_s zone_loadavg; /* loadavg for this zone */
718 719 uint64_t zone_hp_avenrun[3]; /* high-precision avenrun */
719 720 int zone_avenrun[3]; /* FSCALED avg. run queue len */
720 721
721 722 /*
722 723 * FSS stats updated once per second by fss_decay_usage.
723 724 */
724 725 uint32_t zone_fss_gen; /* FSS generation cntr */
725 726 uint64_t zone_run_ticks; /* tot # of ticks running */
726 727
727 728 /*
728 729 * DTrace-private per-zone state
729 730 */
730 731 int zone_dtrace_getf; /* # of unprivileged getf()s */
731 732
732 733 /*
733 734 * Synchronization primitives used to synchronize between mounts and
734 735 * zone creation/destruction.
735 736 */
736 737 int zone_mounts_in_progress;
737 738 kcondvar_t zone_mount_cv;
738 739 kmutex_t zone_mount_lock;
739 740 } zone_t;
740 741
741 742 /*
742 743 * Data and counters used for ZFS fair-share disk IO.
743 744 */
744 745 typedef struct zone_zfs_io {
745 746 uint16_t zpers_zfs_io_pri; /* ZFS IO priority - 16k max */
746 747 uint_t zpers_zfs_queued[2]; /* sync I/O enqueued count */
747 748 sys_zio_cntr_t zpers_rd_ops; /* Counters for ZFS reads, */
748 749 sys_zio_cntr_t zpers_wr_ops; /* writes, and */
749 750 sys_zio_cntr_t zpers_lwr_ops; /* logical writes. */
750 751 kstat_io_t zpers_zfs_rwstats;
751 752 uint64_t zpers_io_util; /* IO utilization metric */
752 753 uint64_t zpers_zfs_rd_waittime;
753 754 uint8_t zpers_io_delay; /* IO delay on logical r/w */
754 755 uint8_t zpers_zfs_weight; /* used to prevent starvation */
755 756 uint8_t zpers_io_util_above_avg; /* IO util percent > avg. */
756 757 } zone_zfs_io_t;
757 758
758 759 /*
759 760 * "Persistent" zone data which can be accessed idependently of the zone_t.
760 761 */
761 762 typedef struct zone_persist {
762 763 kmutex_t zpers_zfs_lock; /* Protects zpers_zfsp references */
763 764 zone_zfs_io_t *zpers_zfsp; /* ZFS fair-share IO data */
764 765 uint8_t zpers_over; /* currently over cap */
765 766 uint32_t zpers_pg_cnt; /* current RSS in pages */
766 767 uint32_t zpers_pg_limit; /* current RRS limit in pages */
767 768 uint32_t zpers_nover; /* # of times over phys. cap */
768 769 #ifndef DEBUG
769 770 uint64_t zpers_pg_out; /* # pages flushed */
770 771 #else
771 772 /*
772 773 * To conserve memory, some detailed kstats are only kept for DEBUG
773 774 * builds.
774 775 */
775 776 uint64_t zpers_zfs_rd_waittime;
776 777
777 778 uint64_t zpers_pg_anon; /* # clean anon pages flushed */
778 779 uint64_t zpers_pg_anondirty; /* # dirty anon pages flushed */
779 780 uint64_t zpers_pg_fs; /* # clean fs pages flushed */
780 781 uint64_t zpers_pg_fsdirty; /* # dirty fs pages flushed */
781 782 #endif
782 783 } zone_persist_t;
783 784
784 785 typedef enum zone_pageout_op {
785 786 ZPO_DIRTY, ZPO_FS, ZPO_ANON, ZPO_ANONDIRTY
786 787 } zone_pageout_op_t;
787 788
788 789 /*
789 790 * Special value of zone_psetid to indicate that pools are disabled.
790 791 */
791 792 #define ZONE_PS_INVAL PS_MYID
792 793
793 794 extern zone_t zone0;
794 795 extern zone_t *global_zone;
795 796 extern uint_t maxzones;
796 797 extern rctl_hndl_t rc_zone_nlwps;
797 798 extern rctl_hndl_t rc_zone_nprocs;
798 799
799 800 extern long zone(int, void *, void *, void *, void *);
800 801 extern void zone_zsd_init(void);
801 802 extern void zone_init(void);
802 803 extern void zone_hold(zone_t *);
803 804 extern void zone_rele(zone_t *);
804 805 extern void zone_init_ref(zone_ref_t *);
805 806 extern void zone_hold_ref(zone_t *, zone_ref_t *, zone_ref_subsys_t);
806 807 extern void zone_rele_ref(zone_ref_t *, zone_ref_subsys_t);
807 808 extern void zone_cred_hold(zone_t *);
808 809 extern void zone_cred_rele(zone_t *);
809 810 extern void zone_task_hold(zone_t *);
810 811 extern void zone_task_rele(zone_t *);
811 812 extern zone_t *zone_find_by_id(zoneid_t);
812 813 extern zone_t *zone_find_by_label(const ts_label_t *);
813 814 extern zone_t *zone_find_by_name(char *);
814 815 extern zone_t *zone_find_by_any_path(const char *, boolean_t);
815 816 extern zone_t *zone_find_by_path(const char *);
816 817 extern zoneid_t getzoneid(void);
817 818 extern zoneid_t getzonedid(void);
818 819 extern zone_t *zone_find_by_id_nolock(zoneid_t);
819 820 extern int zone_datalink_walk(zoneid_t, int (*)(datalink_id_t, void *), void *);
820 821 extern int zone_check_datalink(zoneid_t *, datalink_id_t);
821 822 extern void zone_loadavg_update();
822 823
823 824 /*
824 825 * Zone-specific data (ZSD) APIs
825 826 */
826 827 /*
827 828 * The following is what code should be initializing its zone_key_t to if it
828 829 * calls zone_getspecific() without necessarily knowing that zone_key_create()
829 830 * has been called on the key.
830 831 */
831 832 #define ZONE_KEY_UNINITIALIZED 0
832 833
833 834 typedef uint_t zone_key_t;
834 835
835 836 extern void zone_key_create(zone_key_t *, void *(*)(zoneid_t),
836 837 void (*)(zoneid_t, void *), void (*)(zoneid_t, void *));
837 838 extern int zone_key_delete(zone_key_t);
838 839 extern void *zone_getspecific(zone_key_t, zone_t *);
839 840 extern int zone_setspecific(zone_key_t, zone_t *, const void *);
840 841
841 842 /*
842 843 * The definition of a zsd_entry is truly private to zone.c and is only
843 844 * placed here so it can be shared with mdb.
844 845 *
845 846 * State maintained for each zone times each registered key, which tracks
846 847 * the state of the create, shutdown and destroy callbacks.
847 848 *
848 849 * zsd_flags is used to keep track of pending actions to avoid holding locks
849 850 * when calling the create/shutdown/destroy callbacks, since doing so
850 851 * could lead to deadlocks.
851 852 */
852 853 struct zsd_entry {
853 854 zone_key_t zsd_key; /* Key used to lookup value */
854 855 void *zsd_data; /* Caller-managed value */
855 856 /*
856 857 * Callbacks to be executed when a zone is created, shutdown, and
857 858 * destroyed, respectively.
858 859 */
859 860 void *(*zsd_create)(zoneid_t);
860 861 void (*zsd_shutdown)(zoneid_t, void *);
861 862 void (*zsd_destroy)(zoneid_t, void *);
862 863 list_node_t zsd_linkage;
863 864 uint16_t zsd_flags; /* See below */
864 865 kcondvar_t zsd_cv;
865 866 };
866 867
867 868 /*
868 869 * zsd_flags
869 870 */
870 871 #define ZSD_CREATE_NEEDED 0x0001
871 872 #define ZSD_CREATE_INPROGRESS 0x0002
872 873 #define ZSD_CREATE_COMPLETED 0x0004
873 874 #define ZSD_SHUTDOWN_NEEDED 0x0010
874 875 #define ZSD_SHUTDOWN_INPROGRESS 0x0020
875 876 #define ZSD_SHUTDOWN_COMPLETED 0x0040
876 877 #define ZSD_DESTROY_NEEDED 0x0100
877 878 #define ZSD_DESTROY_INPROGRESS 0x0200
878 879 #define ZSD_DESTROY_COMPLETED 0x0400
879 880
880 881 #define ZSD_CREATE_ALL \
881 882 (ZSD_CREATE_NEEDED|ZSD_CREATE_INPROGRESS|ZSD_CREATE_COMPLETED)
882 883 #define ZSD_SHUTDOWN_ALL \
883 884 (ZSD_SHUTDOWN_NEEDED|ZSD_SHUTDOWN_INPROGRESS|ZSD_SHUTDOWN_COMPLETED)
884 885 #define ZSD_DESTROY_ALL \
885 886 (ZSD_DESTROY_NEEDED|ZSD_DESTROY_INPROGRESS|ZSD_DESTROY_COMPLETED)
886 887
887 888 #define ZSD_ALL_INPROGRESS \
888 889 (ZSD_CREATE_INPROGRESS|ZSD_SHUTDOWN_INPROGRESS|ZSD_DESTROY_INPROGRESS)
889 890
890 891 /*
891 892 * Macros to help with zone visibility restrictions.
892 893 */
893 894
894 895 /*
895 896 * Is process in the global zone?
896 897 */
897 898 #define INGLOBALZONE(p) \
898 899 ((p)->p_zone == global_zone)
899 900
900 901 /*
901 902 * Can process view objects in given zone?
902 903 */
903 904 #define HASZONEACCESS(p, zoneid) \
904 905 ((p)->p_zone->zone_id == (zoneid) || INGLOBALZONE(p))
905 906
906 907 /*
907 908 * Convenience macro to see if a resolved path is visible from within a
908 909 * given zone.
909 910 *
910 911 * The basic idea is that the first (zone_rootpathlen - 1) bytes of the
911 912 * two strings must be equal. Since the rootpathlen has a trailing '/',
912 913 * we want to skip everything in the path up to (but not including) the
913 914 * trailing '/'.
914 915 */
915 916 #define ZONE_PATH_VISIBLE(path, zone) \
916 917 (strncmp((path), (zone)->zone_rootpath, \
917 918 (zone)->zone_rootpathlen - 1) == 0)
918 919
919 920 /*
920 921 * Convenience macro to go from the global view of a path to that seen
921 922 * from within said zone. It is the responsibility of the caller to
922 923 * ensure that the path is a resolved one (ie, no '..'s or '.'s), and is
923 924 * in fact visible from within the zone.
924 925 */
925 926 #define ZONE_PATH_TRANSLATE(path, zone) \
926 927 (ASSERT(ZONE_PATH_VISIBLE(path, zone)), \
927 928 (path) + (zone)->zone_rootpathlen - 2)
928 929
929 930 /*
930 931 * Special processes visible in all zones.
931 932 */
932 933 #define ZONE_SPECIALPID(x) ((x) == 0 || (x) == 1)
933 934
934 935 /*
935 936 * A root vnode of the current zone.
936 937 *
937 938 * NOTE: It may be necessary (initialization time for file sharing where an
938 939 * NGZ loads a file-sharing kernel module that does zsd initialization) to NOT
939 940 * use this macro. One should ASSERT() that curzone == active ZSD (an
940 941 * ASSERTion that's not always true at ZSD initialization time) during regular
941 942 * use of this macro.
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942 943 */
943 944 #define ZONE_ROOTVP() (curzone->zone_rootvp)
944 945
945 946 /*
946 947 * Since a zone's root isn't necessarily an actual filesystem boundary
947 948 * (i.e. VROOT may not be set on zone->zone_rootvp) we need to not assume it.
948 949 * This macro helps in checking if a vnode is the current zone's rootvp.
949 950 * NOTE: Using the VN_ prefix, even though it's defined here in zone.h.
950 951 * NOTE2: See above warning about ZONE_ROOTVP().
951 952 */
952 -#define VN_IS_CURZONEROOT(vp) (VN_CMP(vp, ZONE_ROOTVP()))
953 +#define VN_IS_CURZONEROOT(vp) (VN_CMP(vp, ZONE_ROOTVP()))
953 954
954 955 /*
955 956 * Zone-safe version of thread_create() to be used when the caller wants to
956 957 * create a kernel thread to run within the current zone's context.
957 958 */
958 959 extern kthread_t *zthread_create(caddr_t, size_t, void (*)(), void *, size_t,
959 960 pri_t);
960 961 extern void zthread_exit(void);
961 962
962 963 /*
963 964 * Functions for an external observer to register interest in a zone's status
964 965 * change. Observers will be woken up when the zone status equals the status
965 966 * argument passed in (in the case of zone_status_timedwait, the function may
966 967 * also return because of a timeout; zone_status_wait_sig may return early due
967 968 * to a signal being delivered; zone_status_timedwait_sig may return for any of
968 969 * the above reasons).
969 970 *
970 971 * Otherwise these behave identically to cv_timedwait(), cv_wait(), and
971 972 * cv_wait_sig() respectively.
972 973 */
973 974 extern clock_t zone_status_timedwait(zone_t *, clock_t, zone_status_t);
974 975 extern clock_t zone_status_timedwait_sig(zone_t *, clock_t, zone_status_t);
975 976 extern void zone_status_wait(zone_t *, zone_status_t);
976 977 extern int zone_status_wait_sig(zone_t *, zone_status_t);
977 978
978 979 /*
979 980 * Get the status of the zone (at the time it was called). The state may
980 981 * have progressed by the time it is returned.
981 982 */
982 983 extern zone_status_t zone_status_get(zone_t *);
983 984
984 985 /*
985 986 * Safely get the hostid of the specified zone (defaults to machine's hostid
986 987 * if the specified zone doesn't emulate a hostid). Passing NULL retrieves
987 988 * the global zone's (i.e., physical system's) hostid.
988 989 */
989 990 extern uint32_t zone_get_hostid(zone_t *);
990 991
991 992 /*
992 993 * Get the "kcred" credentials corresponding to the given zone.
993 994 */
994 995 extern struct cred *zone_get_kcred(zoneid_t);
995 996
996 997 /*
997 998 * Get/set the pool the zone is currently bound to.
998 999 */
999 1000 extern struct pool *zone_pool_get(zone_t *);
1000 1001 extern void zone_pool_set(zone_t *, struct pool *);
1001 1002
1002 1003 /*
1003 1004 * Get/set the pset the zone is currently using.
1004 1005 */
1005 1006 extern psetid_t zone_pset_get(zone_t *);
1006 1007 extern void zone_pset_set(zone_t *, psetid_t);
1007 1008
1008 1009 /*
1009 1010 * Get the number of cpus/online-cpus visible from the given zone.
1010 1011 */
1011 1012 extern int zone_ncpus_get(zone_t *);
1012 1013 extern int zone_ncpus_online_get(zone_t *);
1013 1014
1014 1015 /*
1015 1016 * Returns true if the named pool/dataset is visible in the current zone.
1016 1017 */
1017 1018 extern int zone_dataset_visible(const char *, int *);
1018 1019 extern int zone_dataset_visible_inzone(zone_t *, const char *, int *);
1019 1020
1020 1021 /*
1021 1022 * zone version of kadmin()
1022 1023 */
1023 1024 extern int zone_kadmin(int, int, const char *, cred_t *);
1024 1025 extern void zone_shutdown_global(void);
1025 1026
1026 1027 extern void mount_in_progress(zone_t *);
1027 1028 extern void mount_completed(zone_t *);
1028 1029
1029 1030 extern int zone_walk(int (*)(zone_t *, void *), void *);
1030 1031
1031 1032 struct page;
1032 1033 extern void zone_add_page(struct page *);
1033 1034 extern void zone_rm_page(struct page *);
1034 1035 extern void zone_pageout_stat(int, zone_pageout_op_t);
1035 1036 extern void zone_get_physmem_data(int, pgcnt_t *, pgcnt_t *);
1036 1037
1037 1038 /* Interfaces for page scanning */
1038 1039 extern uint_t zone_num_over_cap;
1039 1040 extern zone_persist_t zone_pdata[MAX_ZONES];
1040 1041
1041 1042 extern rctl_hndl_t rc_zone_locked_mem;
1042 1043 extern rctl_hndl_t rc_zone_max_swap;
1043 1044 extern rctl_hndl_t rc_zone_phys_mem;
1044 1045 extern rctl_hndl_t rc_zone_max_lofi;
1045 1046
1046 1047 /* For publishing sysevents related to a particular zone */
1047 1048 extern void zone_sysevent_publish(zone_t *, const char *, const char *,
1048 1049 nvlist_t *);
1049 1050
1050 1051 #endif /* _KERNEL */
1051 1052
1052 1053 #ifdef __cplusplus
1053 1054 }
1054 1055 #endif
1055 1056
1056 1057 #endif /* _SYS_ZONE_H */
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