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 (c) 2013, Joyent Inc. All rights reserved.
25 * Copyright (c) 2015 by Delphix. All rights reserved.
26 */
27
28 /*
29 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
30 */
31
32 /*
33 * This module contains functions used to bring up and tear down the
34 * Virtual Platform: [un]mounting file-systems, [un]plumbing network
35 * interfaces, [un]configuring devices, establishing resource controls,
36 * and creating/destroying the zone in the kernel. These actions, on
37 * the way up, ready the zone; on the way down, they halt the zone.
38 * See the much longer block comment at the beginning of zoneadmd.c
39 * for a bigger picture of how the whole program functions.
40 *
41 * This module also has primary responsibility for the layout of "scratch
42 * zones." These are mounted, but inactive, zones that are used during
43 * operating system upgrade and potentially other administrative action. The
44 * scratch zone environment is similar to the miniroot environment. The zone's
45 * actual root is mounted read-write on /a, and the standard paths (/usr,
46 * /sbin, /lib) all lead to read-only copies of the running system's binaries.
47 * This allows the administrative tools to manipulate the zone using "-R /a"
48 * without relying on any binaries in the zone itself.
49 *
50 * If the scratch zone is on an alternate root (Live Upgrade [LU] boot
51 * environment), then we must resolve the lofs mounts used there to uncover
52 * writable (unshared) resources. Shared resources, though, are always
53 * read-only. In addition, if the "same" zone with a different root path is
54 * currently running, then "/b" inside the zone points to the running zone's
55 * root. This allows LU to synchronize configuration files during the upgrade
56 * process.
57 *
58 * To construct this environment, this module creates a tmpfs mount on
59 * $ZONEPATH/lu. Inside this scratch area, the miniroot-like environment as
60 * described above is constructed on the fly. The zone is then created using
61 * $ZONEPATH/lu as the root.
62 *
63 * Note that scratch zones are inactive. The zone's bits are not running and
64 * likely cannot be run correctly until upgrade is done. Init is not running
65 * there, nor is SMF. Because of this, the "mounted" state of a scratch zone
66 * is not a part of the usual halt/ready/boot state machine.
67 */
68
69 #include <sys/param.h>
70 #include <sys/mount.h>
71 #include <sys/mntent.h>
72 #include <sys/socket.h>
73 #include <sys/utsname.h>
74 #include <sys/types.h>
75 #include <sys/stat.h>
76 #include <sys/sockio.h>
77 #include <sys/stropts.h>
78 #include <sys/conf.h>
79 #include <sys/systeminfo.h>
80
81 #include <libdlpi.h>
82 #include <libdllink.h>
83 #include <libdlvlan.h>
84
85 #include <inet/tcp.h>
86 #include <arpa/inet.h>
87 #include <netinet/in.h>
88 #include <net/route.h>
89
90 #include <stdio.h>
91 #include <errno.h>
92 #include <fcntl.h>
93 #include <unistd.h>
94 #include <rctl.h>
95 #include <stdlib.h>
96 #include <string.h>
97 #include <strings.h>
98 #include <wait.h>
99 #include <limits.h>
100 #include <libgen.h>
101 #include <libzfs.h>
102 #include <libdevinfo.h>
103 #include <zone.h>
104 #include <assert.h>
105 #include <libcontract.h>
106 #include <libcontract_priv.h>
107 #include <uuid/uuid.h>
108
109 #include <sys/mntio.h>
110 #include <sys/mnttab.h>
111 #include <sys/fs/autofs.h> /* for _autofssys() */
112 #include <sys/fs/lofs_info.h>
113 #include <sys/fs/zfs.h>
114
115 #include <pool.h>
116 #include <sys/pool.h>
117 #include <sys/priocntl.h>
118
119 #include <libbrand.h>
120 #include <sys/brand.h>
121 #include <libzonecfg.h>
122 #include <synch.h>
123
124 #include "zoneadmd.h"
125 #include <tsol/label.h>
126 #include <libtsnet.h>
127 #include <sys/priv.h>
128 #include <libinetutil.h>
129
130 #define V4_ADDR_LEN 32
131 #define V6_ADDR_LEN 128
132
133 #define RESOURCE_DEFAULT_OPTS \
134 MNTOPT_RO "," MNTOPT_LOFS_NOSUB "," MNTOPT_NODEVICES
135
136 #define DFSTYPES "/etc/dfs/fstypes"
137 #define MAXTNZLEN 2048
138
139 #define ALT_MOUNT(mount_cmd) ((mount_cmd) != Z_MNT_BOOT)
140
141 /* a reasonable estimate for the number of lwps per process */
142 #define LWPS_PER_PROCESS 10
143
144 /* for routing socket */
145 static int rts_seqno = 0;
146
147 /* mangled zone name when mounting in an alternate root environment */
148 static char kernzone[ZONENAME_MAX];
149
150 /* array of cached mount entries for resolve_lofs */
151 static struct mnttab *resolve_lofs_mnts, *resolve_lofs_mnt_max;
152
153 /* for Trusted Extensions */
154 static tsol_zcent_t *get_zone_label(zlog_t *, priv_set_t *);
155 static int tsol_mounts(zlog_t *, char *, char *);
156 static void tsol_unmounts(zlog_t *, char *);
157
158 static m_label_t *zlabel = NULL;
159 static m_label_t *zid_label = NULL;
160 static priv_set_t *zprivs = NULL;
161
162 static const char *DFLT_FS_ALLOWED = "hsfs,smbfs,nfs,nfs3,nfs4,nfsdyn";
163
164 /* from libsocket, not in any header file */
165 extern int getnetmaskbyaddr(struct in_addr, struct in_addr *);
166
167 /* from zoneadmd */
168 extern char query_hook[];
169
170 /*
171 * For each "net" resource configured in zonecfg, we track a zone_addr_list_t
172 * node in a linked list that is sorted by linkid. The list is constructed as
173 * the xml configuration file is parsed, and the information
174 * contained in each node is added to the kernel before the zone is
175 * booted, to be retrieved and applied from within the exclusive-IP NGZ
176 * on boot.
177 */
178 typedef struct zone_addr_list {
179 struct zone_addr_list *za_next;
180 datalink_id_t za_linkid; /* datalink_id_t of interface */
181 struct zone_nwiftab za_nwiftab; /* address, defrouter properties */
182 } zone_addr_list_t;
183
184 /*
185 * An optimization for build_mnttable: reallocate (and potentially copy the
186 * data) only once every N times through the loop.
187 */
188 #define MNTTAB_HUNK 32
189
190 /* some handy macros */
191 #define SIN(s) ((struct sockaddr_in *)s)
192 #define SIN6(s) ((struct sockaddr_in6 *)s)
193
194 /*
195 * Private autofs system call
196 */
197 extern int _autofssys(int, void *);
198
199 static int
200 autofs_cleanup(zoneid_t zoneid)
201 {
202 /*
203 * Ask autofs to unmount all trigger nodes in the given zone.
204 */
205 return (_autofssys(AUTOFS_UNMOUNTALL, (void *)zoneid));
206 }
207
208 static void
209 free_mnttable(struct mnttab *mnt_array, uint_t nelem)
210 {
211 uint_t i;
212
213 if (mnt_array == NULL)
214 return;
215 for (i = 0; i < nelem; i++) {
216 free(mnt_array[i].mnt_mountp);
217 free(mnt_array[i].mnt_fstype);
218 free(mnt_array[i].mnt_special);
219 free(mnt_array[i].mnt_mntopts);
220 assert(mnt_array[i].mnt_time == NULL);
221 }
222 free(mnt_array);
223 }
224
225 /*
226 * Build the mount table for the zone rooted at "zroot", storing the resulting
227 * array of struct mnttabs in "mnt_arrayp" and the number of elements in the
228 * array in "nelemp".
229 */
230 static int
231 build_mnttable(zlog_t *zlogp, const char *zroot, size_t zrootlen, FILE *mnttab,
232 struct mnttab **mnt_arrayp, uint_t *nelemp)
233 {
234 struct mnttab mnt;
235 struct mnttab *mnts;
236 struct mnttab *mnp;
237 uint_t nmnt;
238
239 rewind(mnttab);
240 resetmnttab(mnttab);
241 nmnt = 0;
242 mnts = NULL;
243 while (getmntent(mnttab, &mnt) == 0) {
244 struct mnttab *tmp_array;
245
246 if (strncmp(mnt.mnt_mountp, zroot, zrootlen) != 0)
247 continue;
248 if (nmnt % MNTTAB_HUNK == 0) {
249 tmp_array = realloc(mnts,
250 (nmnt + MNTTAB_HUNK) * sizeof (*mnts));
251 if (tmp_array == NULL) {
252 free_mnttable(mnts, nmnt);
253 return (-1);
254 }
255 mnts = tmp_array;
256 }
257 mnp = &mnts[nmnt++];
258
259 /*
260 * Zero out any fields we're not using.
261 */
262 (void) memset(mnp, 0, sizeof (*mnp));
263
264 if (mnt.mnt_special != NULL)
265 mnp->mnt_special = strdup(mnt.mnt_special);
266 if (mnt.mnt_mntopts != NULL)
267 mnp->mnt_mntopts = strdup(mnt.mnt_mntopts);
268 mnp->mnt_mountp = strdup(mnt.mnt_mountp);
269 mnp->mnt_fstype = strdup(mnt.mnt_fstype);
270 if ((mnt.mnt_special != NULL && mnp->mnt_special == NULL) ||
271 (mnt.mnt_mntopts != NULL && mnp->mnt_mntopts == NULL) ||
272 mnp->mnt_mountp == NULL || mnp->mnt_fstype == NULL) {
273 zerror(zlogp, B_TRUE, "memory allocation failed");
274 free_mnttable(mnts, nmnt);
275 return (-1);
276 }
277 }
278 *mnt_arrayp = mnts;
279 *nelemp = nmnt;
280 return (0);
281 }
282
283 /*
284 * This is an optimization. The resolve_lofs function is used quite frequently
285 * to manipulate file paths, and on a machine with a large number of zones,
286 * there will be a huge number of mounted file systems. Thus, we trigger a
287 * reread of the list of mount points
288 */
289 static void
290 lofs_discard_mnttab(void)
291 {
292 free_mnttable(resolve_lofs_mnts,
293 resolve_lofs_mnt_max - resolve_lofs_mnts);
294 resolve_lofs_mnts = resolve_lofs_mnt_max = NULL;
295 }
296
297 static int
298 lofs_read_mnttab(zlog_t *zlogp)
299 {
300 FILE *mnttab;
301 uint_t nmnts;
302
303 if ((mnttab = fopen(MNTTAB, "r")) == NULL)
304 return (-1);
305 if (build_mnttable(zlogp, "", 0, mnttab, &resolve_lofs_mnts,
306 &nmnts) == -1) {
307 (void) fclose(mnttab);
308 return (-1);
309 }
310 (void) fclose(mnttab);
311 resolve_lofs_mnt_max = resolve_lofs_mnts + nmnts;
312 return (0);
313 }
314
315 /*
316 * This function loops over potential loopback mounts and symlinks in a given
317 * path and resolves them all down to an absolute path.
318 */
319 void
320 resolve_lofs(zlog_t *zlogp, char *path, size_t pathlen)
321 {
322 int len, arlen;
323 const char *altroot;
324 char tmppath[MAXPATHLEN];
325 boolean_t outside_altroot;
326
327 if ((len = resolvepath(path, tmppath, sizeof (tmppath))) == -1)
328 return;
329 tmppath[len] = '\0';
330 (void) strlcpy(path, tmppath, sizeof (tmppath));
331
332 /* This happens once per zoneadmd operation. */
333 if (resolve_lofs_mnts == NULL && lofs_read_mnttab(zlogp) == -1)
334 return;
335
336 altroot = zonecfg_get_root();
337 arlen = strlen(altroot);
338 outside_altroot = B_FALSE;
339 for (;;) {
340 struct mnttab *mnp;
341
342 /* Search in reverse order to find longest match */
343 for (mnp = resolve_lofs_mnt_max - 1; mnp >= resolve_lofs_mnts;
344 mnp--) {
345 if (mnp->mnt_fstype == NULL ||
346 mnp->mnt_mountp == NULL ||
347 mnp->mnt_special == NULL)
348 continue;
349 len = strlen(mnp->mnt_mountp);
350 if (strncmp(mnp->mnt_mountp, path, len) == 0 &&
351 (path[len] == '/' || path[len] == '\0'))
352 break;
353 }
354 if (mnp < resolve_lofs_mnts)
355 break;
356 /* If it's not a lofs then we're done */
357 if (strcmp(mnp->mnt_fstype, MNTTYPE_LOFS) != 0)
358 break;
359 if (outside_altroot) {
360 char *cp;
361 int olen = sizeof (MNTOPT_RO) - 1;
362
363 /*
364 * If we run into a read-only mount outside of the
365 * alternate root environment, then the user doesn't
366 * want this path to be made read-write.
367 */
368 if (mnp->mnt_mntopts != NULL &&
369 (cp = strstr(mnp->mnt_mntopts, MNTOPT_RO)) !=
370 NULL &&
371 (cp == mnp->mnt_mntopts || cp[-1] == ',') &&
372 (cp[olen] == '\0' || cp[olen] == ',')) {
373 break;
374 }
375 } else if (arlen > 0 &&
376 (strncmp(mnp->mnt_special, altroot, arlen) != 0 ||
377 (mnp->mnt_special[arlen] != '\0' &&
378 mnp->mnt_special[arlen] != '/'))) {
379 outside_altroot = B_TRUE;
380 }
381 /* use temporary buffer because new path might be longer */
382 (void) snprintf(tmppath, sizeof (tmppath), "%s%s",
383 mnp->mnt_special, path + len);
384 if ((len = resolvepath(tmppath, path, pathlen)) == -1)
385 break;
386 path[len] = '\0';
387 }
388 }
389
390 /*
391 * For a regular mount, check if a replacement lofs mount is needed because the
392 * referenced device is already mounted somewhere.
393 */
394 static int
395 check_lofs_needed(zlog_t *zlogp, struct zone_fstab *fsptr)
396 {
397 struct mnttab *mnp;
398 zone_fsopt_t *optptr, *onext;
399
400 /* This happens once per zoneadmd operation. */
401 if (resolve_lofs_mnts == NULL && lofs_read_mnttab(zlogp) == -1)
402 return (-1);
403
404 /*
405 * If this special node isn't already in use, then it's ours alone;
406 * no need to worry about conflicting mounts.
407 */
408 for (mnp = resolve_lofs_mnts; mnp < resolve_lofs_mnt_max;
409 mnp++) {
410 if (strcmp(mnp->mnt_special, fsptr->zone_fs_special) == 0)
411 break;
412 }
413 if (mnp >= resolve_lofs_mnt_max)
414 return (0);
415
416 /*
417 * Convert this duplicate mount into a lofs mount.
418 */
419 (void) strlcpy(fsptr->zone_fs_special, mnp->mnt_mountp,
420 sizeof (fsptr->zone_fs_special));
421 (void) strlcpy(fsptr->zone_fs_type, MNTTYPE_LOFS,
422 sizeof (fsptr->zone_fs_type));
423 fsptr->zone_fs_raw[0] = '\0';
424
425 /*
426 * Discard all but one of the original options and set that to our
427 * default set of options used for resources.
428 */
429 optptr = fsptr->zone_fs_options;
430 if (optptr == NULL) {
431 optptr = malloc(sizeof (*optptr));
432 if (optptr == NULL) {
433 zerror(zlogp, B_TRUE, "cannot mount %s",
434 fsptr->zone_fs_dir);
435 return (-1);
436 }
437 } else {
438 while ((onext = optptr->zone_fsopt_next) != NULL) {
439 optptr->zone_fsopt_next = onext->zone_fsopt_next;
440 free(onext);
441 }
442 }
443 (void) strcpy(optptr->zone_fsopt_opt, RESOURCE_DEFAULT_OPTS);
444 optptr->zone_fsopt_next = NULL;
445 fsptr->zone_fs_options = optptr;
446 return (0);
447 }
448
449 int
450 make_one_dir(zlog_t *zlogp, const char *prefix, const char *subdir, mode_t mode,
451 uid_t userid, gid_t groupid)
452 {
453 char path[MAXPATHLEN];
454 struct stat st;
455
456 if (snprintf(path, sizeof (path), "%s%s", prefix, subdir) >
457 sizeof (path)) {
458 zerror(zlogp, B_FALSE, "pathname %s%s is too long", prefix,
459 subdir);
460 return (-1);
461 }
462
463 if (lstat(path, &st) == 0) {
464 /*
465 * We don't check the file mode since presumably the zone
466 * administrator may have had good reason to change the mode,
467 * and we don't need to second guess him.
468 */
469 if (!S_ISDIR(st.st_mode)) {
470 if (S_ISREG(st.st_mode)) {
471 /*
472 * Allow readonly mounts of /etc/ files; this
473 * is needed most by Trusted Extensions.
474 */
475 if (strncmp(subdir, "/etc/",
476 strlen("/etc/")) != 0) {
477 zerror(zlogp, B_FALSE,
478 "%s is not in /etc", path);
479 return (-1);
480 }
481 } else {
482 zerror(zlogp, B_FALSE,
483 "%s is not a directory", path);
484 return (-1);
485 }
486 }
487 return (0);
488 }
489
490 if (mkdirp(path, mode) != 0) {
491 if (errno == EROFS)
492 zerror(zlogp, B_FALSE, "Could not mkdir %s.\nIt is on "
493 "a read-only file system in this local zone.\nMake "
494 "sure %s exists in the global zone.", path, subdir);
495 else
496 zerror(zlogp, B_TRUE, "mkdirp of %s failed", path);
497 return (-1);
498 }
499
500 (void) chown(path, userid, groupid);
501 return (0);
502 }
503
504 static void
505 free_remote_fstypes(char **types)
506 {
507 uint_t i;
508
509 if (types == NULL)
510 return;
511 for (i = 0; types[i] != NULL; i++)
512 free(types[i]);
513 free(types);
514 }
515
516 static char **
517 get_remote_fstypes(zlog_t *zlogp)
518 {
519 char **types = NULL;
520 FILE *fp;
521 char buf[MAXPATHLEN];
522 char fstype[MAXPATHLEN];
523 uint_t lines = 0;
524 uint_t i;
525
526 if ((fp = fopen(DFSTYPES, "r")) == NULL) {
527 zerror(zlogp, B_TRUE, "failed to open %s", DFSTYPES);
528 return (NULL);
529 }
530 /*
531 * Count the number of lines
532 */
533 while (fgets(buf, sizeof (buf), fp) != NULL)
534 lines++;
535 if (lines == 0) /* didn't read anything; empty file */
536 goto out;
537 rewind(fp);
538 /*
539 * Allocate enough space for a NULL-terminated array.
540 */
541 types = calloc(lines + 1, sizeof (char *));
542 if (types == NULL) {
543 zerror(zlogp, B_TRUE, "memory allocation failed");
544 goto out;
545 }
546 i = 0;
547 while (fgets(buf, sizeof (buf), fp) != NULL) {
548 /* LINTED - fstype is big enough to hold buf */
549 if (sscanf(buf, "%s", fstype) == 0) {
550 zerror(zlogp, B_FALSE, "unable to parse %s", DFSTYPES);
551 free_remote_fstypes(types);
552 types = NULL;
553 goto out;
554 }
555 types[i] = strdup(fstype);
556 if (types[i] == NULL) {
557 zerror(zlogp, B_TRUE, "memory allocation failed");
558 free_remote_fstypes(types);
559 types = NULL;
560 goto out;
561 }
562 i++;
563 }
564 out:
565 (void) fclose(fp);
566 return (types);
567 }
568
569 static boolean_t
570 is_remote_fstype(const char *fstype, char *const *remote_fstypes)
571 {
572 uint_t i;
573
574 if (remote_fstypes == NULL)
575 return (B_FALSE);
576 for (i = 0; remote_fstypes[i] != NULL; i++) {
577 if (strcmp(remote_fstypes[i], fstype) == 0)
578 return (B_TRUE);
579 }
580 return (B_FALSE);
581 }
582
583 /*
584 * This converts a zone root path (normally of the form .../root) to a Live
585 * Upgrade scratch zone root (of the form .../lu).
586 */
587 static void
588 root_to_lu(zlog_t *zlogp, char *zroot, size_t zrootlen, boolean_t isresolved)
589 {
590 if (!isresolved && zonecfg_in_alt_root())
591 resolve_lofs(zlogp, zroot, zrootlen);
592 (void) strcpy(strrchr(zroot, '/') + 1, "lu");
593 }
594
595 /*
596 * The general strategy for unmounting filesystems is as follows:
597 *
598 * - Remote filesystems may be dead, and attempting to contact them as
599 * part of a regular unmount may hang forever; we want to always try to
600 * forcibly unmount such filesystems and only fall back to regular
601 * unmounts if the filesystem doesn't support forced unmounts.
602 *
603 * - We don't want to unnecessarily corrupt metadata on local
604 * filesystems (ie UFS), so we want to start off with graceful unmounts,
605 * and only escalate to doing forced unmounts if we get stuck.
606 *
607 * We start off walking backwards through the mount table. This doesn't
608 * give us strict ordering but ensures that we try to unmount submounts
609 * first. We thus limit the number of failed umount2(2) calls.
610 *
611 * The mechanism for determining if we're stuck is to count the number
612 * of failed unmounts each iteration through the mount table. This
613 * gives us an upper bound on the number of filesystems which remain
614 * mounted (autofs trigger nodes are dealt with separately). If at the
615 * end of one unmount+autofs_cleanup cycle we still have the same number
616 * of mounts that we started out with, we're stuck and try a forced
617 * unmount. If that fails (filesystem doesn't support forced unmounts)
618 * then we bail and are unable to teardown the zone. If it succeeds,
619 * we're no longer stuck so we continue with our policy of trying
620 * graceful mounts first.
621 *
622 * Zone must be down (ie, no processes or threads active).
623 */
624 static int
625 unmount_filesystems(zlog_t *zlogp, zoneid_t zoneid, boolean_t unmount_cmd)
626 {
627 int error = 0;
628 FILE *mnttab;
629 struct mnttab *mnts;
630 uint_t nmnt;
631 char zroot[MAXPATHLEN + 1];
632 size_t zrootlen;
633 uint_t oldcount = UINT_MAX;
634 boolean_t stuck = B_FALSE;
635 char **remote_fstypes = NULL;
636
637 if (zone_get_rootpath(zone_name, zroot, sizeof (zroot)) != Z_OK) {
638 zerror(zlogp, B_FALSE, "unable to determine zone root");
639 return (-1);
640 }
641 if (unmount_cmd)
642 root_to_lu(zlogp, zroot, sizeof (zroot), B_FALSE);
643
644 (void) strcat(zroot, "/");
645 zrootlen = strlen(zroot);
646
647 /*
648 * For Trusted Extensions unmount each higher level zone's mount
649 * of our zone's /export/home
650 */
651 if (!unmount_cmd)
652 tsol_unmounts(zlogp, zone_name);
653
654 if ((mnttab = fopen(MNTTAB, "r")) == NULL) {
655 zerror(zlogp, B_TRUE, "failed to open %s", MNTTAB);
656 return (-1);
657 }
658 /*
659 * Use our hacky mntfs ioctl so we see everything, even mounts with
660 * MS_NOMNTTAB.
661 */
662 if (ioctl(fileno(mnttab), MNTIOC_SHOWHIDDEN, NULL) < 0) {
663 zerror(zlogp, B_TRUE, "unable to configure %s", MNTTAB);
664 error++;
665 goto out;
666 }
667
668 /*
669 * Build the list of remote fstypes so we know which ones we
670 * should forcibly unmount.
671 */
672 remote_fstypes = get_remote_fstypes(zlogp);
673 for (; /* ever */; ) {
674 uint_t newcount = 0;
675 boolean_t unmounted;
676 struct mnttab *mnp;
677 char *path;
678 uint_t i;
679
680 mnts = NULL;
681 nmnt = 0;
682 /*
683 * MNTTAB gives us a way to walk through mounted
684 * filesystems; we need to be able to walk them in
685 * reverse order, so we build a list of all mounted
686 * filesystems.
687 */
688 if (build_mnttable(zlogp, zroot, zrootlen, mnttab, &mnts,
689 &nmnt) != 0) {
690 error++;
691 goto out;
692 }
693 for (i = 0; i < nmnt; i++) {
694 mnp = &mnts[nmnt - i - 1]; /* access in reverse order */
695 path = mnp->mnt_mountp;
696 unmounted = B_FALSE;
697 /*
698 * Try forced unmount first for remote filesystems.
699 *
700 * Not all remote filesystems support forced unmounts,
701 * so if this fails (ENOTSUP) we'll continue on
702 * and try a regular unmount.
703 */
704 if (is_remote_fstype(mnp->mnt_fstype, remote_fstypes)) {
705 if (umount2(path, MS_FORCE) == 0)
706 unmounted = B_TRUE;
707 }
708 /*
709 * Try forced unmount if we're stuck.
710 */
711 if (stuck) {
712 if (umount2(path, MS_FORCE) == 0) {
713 unmounted = B_TRUE;
714 stuck = B_FALSE;
715 } else {
716 /*
717 * The first failure indicates a
718 * mount we won't be able to get
719 * rid of automatically, so we
720 * bail.
721 */
722 error++;
723 zerror(zlogp, B_FALSE,
724 "unable to unmount '%s'", path);
725 free_mnttable(mnts, nmnt);
726 goto out;
727 }
728 }
729 /*
730 * Try regular unmounts for everything else.
731 */
732 if (!unmounted && umount2(path, 0) != 0)
733 newcount++;
734 }
735 free_mnttable(mnts, nmnt);
736
737 if (newcount == 0)
738 break;
739 if (newcount >= oldcount) {
740 /*
741 * Last round didn't unmount anything; we're stuck and
742 * should start trying forced unmounts.
743 */
744 stuck = B_TRUE;
745 }
746 oldcount = newcount;
747
748 /*
749 * Autofs doesn't let you unmount its trigger nodes from
750 * userland so we have to tell the kernel to cleanup for us.
751 */
752 if (autofs_cleanup(zoneid) != 0) {
753 zerror(zlogp, B_TRUE, "unable to remove autofs nodes");
754 error++;
755 goto out;
756 }
757 }
758
759 out:
760 free_remote_fstypes(remote_fstypes);
761 (void) fclose(mnttab);
762 return (error ? -1 : 0);
763 }
764
765 static int
766 fs_compare(const void *m1, const void *m2)
767 {
768 struct zone_fstab *i = (struct zone_fstab *)m1;
769 struct zone_fstab *j = (struct zone_fstab *)m2;
770
771 return (strcmp(i->zone_fs_dir, j->zone_fs_dir));
772 }
773
774 /*
775 * Fork and exec (and wait for) the mentioned binary with the provided
776 * arguments. Returns (-1) if something went wrong with fork(2) or exec(2),
777 * returns the exit status otherwise.
778 *
779 * If we were unable to exec the provided pathname (for whatever
780 * reason), we return the special token ZEXIT_EXEC. The current value
781 * of ZEXIT_EXEC doesn't conflict with legitimate exit codes of the
782 * consumers of this function; any future consumers must make sure this
783 * remains the case.
784 */
785 static int
786 forkexec(zlog_t *zlogp, const char *path, char *const argv[])
787 {
788 pid_t child_pid;
789 int child_status = 0;
790
791 /*
792 * Do not let another thread localize a message while we are forking.
793 */
794 (void) mutex_lock(&msglock);
795 child_pid = fork();
796 (void) mutex_unlock(&msglock);
797 if (child_pid == -1) {
798 zerror(zlogp, B_TRUE, "could not fork for %s", argv[0]);
799 return (-1);
800 } else if (child_pid == 0) {
801 closefrom(0);
802 /* redirect stdin, stdout & stderr to /dev/null */
803 (void) open("/dev/null", O_RDONLY); /* stdin */
804 (void) open("/dev/null", O_WRONLY); /* stdout */
805 (void) open("/dev/null", O_WRONLY); /* stderr */
806 (void) execv(path, argv);
807 /*
808 * Since we are in the child, there is no point calling zerror()
809 * since there is nobody waiting to consume it. So exit with a
810 * special code that the parent will recognize and call zerror()
811 * accordingly.
812 */
813
814 _exit(ZEXIT_EXEC);
815 } else {
816 (void) waitpid(child_pid, &child_status, 0);
817 }
818
819 if (WIFSIGNALED(child_status)) {
820 zerror(zlogp, B_FALSE, "%s unexpectedly terminated due to "
821 "signal %d", path, WTERMSIG(child_status));
822 return (-1);
823 }
824 assert(WIFEXITED(child_status));
825 if (WEXITSTATUS(child_status) == ZEXIT_EXEC) {
826 zerror(zlogp, B_FALSE, "failed to exec %s", path);
827 return (-1);
828 }
829 return (WEXITSTATUS(child_status));
830 }
831
832 static int
833 isregfile(const char *path)
834 {
835 struct stat64 st;
836
837 if (stat64(path, &st) == -1)
838 return (-1);
839
840 return (S_ISREG(st.st_mode));
841 }
842
843 static int
844 dofsck(zlog_t *zlogp, const char *fstype, const char *rawdev)
845 {
846 char cmdbuf[MAXPATHLEN];
847 char *argv[5];
848 int status;
849
850 /*
851 * We could alternatively have called /usr/sbin/fsck -F <fstype>, but
852 * that would cost us an extra fork/exec without buying us anything.
853 */
854 if (snprintf(cmdbuf, sizeof (cmdbuf), "/usr/lib/fs/%s/fsck", fstype)
855 >= sizeof (cmdbuf)) {
856 zerror(zlogp, B_FALSE, "file-system type %s too long", fstype);
857 return (-1);
858 }
859
860 /*
861 * If it doesn't exist, that's OK: we verified this previously
862 * in zoneadm.
863 */
864 if (isregfile(cmdbuf) == -1)
865 return (0);
866
867 argv[0] = "fsck";
868 argv[1] = "-o";
869 argv[2] = "p";
870 argv[3] = (char *)rawdev;
871 argv[4] = NULL;
872
873 status = forkexec(zlogp, cmdbuf, argv);
874 if (status == 0 || status == -1)
875 return (status);
876 zerror(zlogp, B_FALSE, "fsck of '%s' failed with exit status %d; "
877 "run fsck manually", rawdev, status);
878 return (-1);
879 }
880
881 static int
882 domount(zlog_t *zlogp, const char *fstype, const char *opts,
883 const char *special, const char *directory)
884 {
885 char cmdbuf[MAXPATHLEN];
886 char *argv[6];
887 int status;
888
889 /*
890 * We could alternatively have called /usr/sbin/mount -F <fstype>, but
891 * that would cost us an extra fork/exec without buying us anything.
892 */
893 if (snprintf(cmdbuf, sizeof (cmdbuf), "/usr/lib/fs/%s/mount", fstype)
894 >= sizeof (cmdbuf)) {
895 zerror(zlogp, B_FALSE, "file-system type %s too long", fstype);
896 return (-1);
897 }
898 argv[0] = "mount";
899 if (opts[0] == '\0') {
900 argv[1] = (char *)special;
901 argv[2] = (char *)directory;
902 argv[3] = NULL;
903 } else {
904 argv[1] = "-o";
905 argv[2] = (char *)opts;
906 argv[3] = (char *)special;
907 argv[4] = (char *)directory;
908 argv[5] = NULL;
909 }
910
911 status = forkexec(zlogp, cmdbuf, argv);
912 if (status == 0 || status == -1)
913 return (status);
914 if (opts[0] == '\0')
915 zerror(zlogp, B_FALSE, "\"%s %s %s\" "
916 "failed with exit code %d",
917 cmdbuf, special, directory, status);
918 else
919 zerror(zlogp, B_FALSE, "\"%s -o %s %s %s\" "
920 "failed with exit code %d",
921 cmdbuf, opts, special, directory, status);
922 return (-1);
923 }
924
925 /*
926 * Check if a given mount point path exists.
927 * If it does, make sure it doesn't contain any symlinks.
928 * Note that if "leaf" is false we're checking an intermediate
929 * component of the mount point path, so it must be a directory.
930 * If "leaf" is true, then we're checking the entire mount point
931 * path, so the mount point itself can be anything aside from a
932 * symbolic link.
933 *
934 * If the path is invalid then a negative value is returned. If the
935 * path exists and is a valid mount point path then 0 is returned.
936 * If the path doesn't exist return a positive value.
937 */
938 static int
939 valid_mount_point(zlog_t *zlogp, const char *path, const boolean_t leaf)
940 {
941 struct stat statbuf;
942 char respath[MAXPATHLEN];
943 int res;
944
945 if (lstat(path, &statbuf) != 0) {
946 if (errno == ENOENT)
947 return (1);
948 zerror(zlogp, B_TRUE, "can't stat %s", path);
949 return (-1);
950 }
951 if (S_ISLNK(statbuf.st_mode)) {
952 zerror(zlogp, B_FALSE, "%s is a symlink", path);
953 return (-1);
954 }
955 if (!leaf && !S_ISDIR(statbuf.st_mode)) {
956 zerror(zlogp, B_FALSE, "%s is not a directory", path);
957 return (-1);
958 }
959 if ((res = resolvepath(path, respath, sizeof (respath))) == -1) {
960 zerror(zlogp, B_TRUE, "unable to resolve path %s", path);
961 return (-1);
962 }
963 respath[res] = '\0';
964 if (strcmp(path, respath) != 0) {
965 /*
966 * We don't like ".."s, "."s, or "//"s throwing us off
967 */
968 zerror(zlogp, B_FALSE, "%s is not a canonical path", path);
969 return (-1);
970 }
971 return (0);
972 }
973
974 /*
975 * Validate a mount point path. A valid mount point path is an
976 * absolute path that either doesn't exist, or, if it does exists it
977 * must be an absolute canonical path that doesn't have any symbolic
978 * links in it. The target of a mount point path can be any filesystem
979 * object. (Different filesystems can support different mount points,
980 * for example "lofs" and "mntfs" both support files and directories
981 * while "ufs" just supports directories.)
982 *
983 * If the path is invalid then a negative value is returned. If the
984 * path exists and is a valid mount point path then 0 is returned.
985 * If the path doesn't exist return a positive value.
986 */
987 int
988 valid_mount_path(zlog_t *zlogp, const char *rootpath, const char *spec,
989 const char *dir, const char *fstype)
990 {
991 char abspath[MAXPATHLEN], *slashp, *slashp_next;
992 int rv;
993
994 /*
995 * Sanity check the target mount point path.
996 * It must be a non-null string that starts with a '/'.
997 */
998 if (dir[0] != '/') {
999 /* Something went wrong. */
1000 zerror(zlogp, B_FALSE, "invalid mount directory, "
1001 "type: \"%s\", special: \"%s\", dir: \"%s\"",
1002 fstype, spec, dir);
1003 return (-1);
1004 }
1005
1006 /*
1007 * Join rootpath and dir. Make sure abspath ends with '/', this
1008 * is added to all paths (even non-directory paths) to allow us
1009 * to detect the end of paths below. If the path already ends
1010 * in a '/', then that's ok too (although we'll fail the
1011 * cannonical path check in valid_mount_point()).
1012 */
1013 if (snprintf(abspath, sizeof (abspath),
1014 "%s%s/", rootpath, dir) >= sizeof (abspath)) {
1015 zerror(zlogp, B_FALSE, "pathname %s%s is too long",
1016 rootpath, dir);
1017 return (-1);
1018 }
1019
1020 /*
1021 * Starting with rootpath, verify the mount path one component
1022 * at a time. Continue until we've evaluated all of abspath.
1023 */
1024 slashp = &abspath[strlen(rootpath)];
1025 assert(*slashp == '/');
1026 do {
1027 slashp_next = strchr(slashp + 1, '/');
1028 *slashp = '\0';
1029 if (slashp_next != NULL) {
1030 /* This is an intermediary mount path component. */
1031 rv = valid_mount_point(zlogp, abspath, B_FALSE);
1032 } else {
1033 /* This is the last component of the mount path. */
1034 rv = valid_mount_point(zlogp, abspath, B_TRUE);
1035 }
1036 if (rv < 0)
1037 return (rv);
1038 *slashp = '/';
1039 } while ((slashp = slashp_next) != NULL);
1040 return (rv);
1041 }
1042
1043 static int
1044 mount_one_dev_device_cb(void *arg, const char *match, const char *name)
1045 {
1046 di_prof_t prof = arg;
1047
1048 if (name == NULL)
1049 return (di_prof_add_dev(prof, match));
1050 return (di_prof_add_map(prof, match, name));
1051 }
1052
1053 static int
1054 mount_one_dev_symlink_cb(void *arg, const char *source, const char *target)
1055 {
1056 di_prof_t prof = arg;
1057
1058 return (di_prof_add_symlink(prof, source, target));
1059 }
1060
1061 int
1062 vplat_get_iptype(zlog_t *zlogp, zone_iptype_t *iptypep)
1063 {
1064 zone_dochandle_t handle;
1065
1066 if ((handle = zonecfg_init_handle()) == NULL) {
1067 zerror(zlogp, B_TRUE, "getting zone configuration handle");
1068 return (-1);
1069 }
1070 if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK) {
1071 zerror(zlogp, B_FALSE, "invalid configuration");
1072 zonecfg_fini_handle(handle);
1073 return (-1);
1074 }
1075 if (zonecfg_get_iptype(handle, iptypep) != Z_OK) {
1076 zerror(zlogp, B_FALSE, "invalid ip-type configuration");
1077 zonecfg_fini_handle(handle);
1078 return (-1);
1079 }
1080 zonecfg_fini_handle(handle);
1081 return (0);
1082 }
1083
1084 /*
1085 * Apply the standard lists of devices/symlinks/mappings and the user-specified
1086 * list of devices (via zonecfg) to the /dev filesystem. The filesystem will
1087 * use these as a profile/filter to determine what exists in /dev.
1088 */
1089 static int
1090 mount_one_dev(zlog_t *zlogp, char *devpath, zone_mnt_t mount_cmd)
1091 {
1092 char brand[MAXNAMELEN];
1093 zone_dochandle_t handle = NULL;
1094 brand_handle_t bh = NULL;
1095 struct zone_devtab ztab;
1096 di_prof_t prof = NULL;
1097 int err;
1098 int retval = -1;
1099 zone_iptype_t iptype;
1100 const char *curr_iptype;
1101
1102 if (di_prof_init(devpath, &prof)) {
1103 zerror(zlogp, B_TRUE, "failed to initialize profile");
1104 goto cleanup;
1105 }
1106
1107 /*
1108 * Get a handle to the brand info for this zone.
1109 * If we are mounting the zone, then we must always use the default
1110 * brand device mounts.
1111 */
1112 if (ALT_MOUNT(mount_cmd)) {
1113 (void) strlcpy(brand, default_brand, sizeof (brand));
1114 } else {
1115 (void) strlcpy(brand, brand_name, sizeof (brand));
1116 }
1117
1118 if ((bh = brand_open(brand)) == NULL) {
1119 zerror(zlogp, B_FALSE, "unable to determine zone brand");
1120 goto cleanup;
1121 }
1122
1123 if (vplat_get_iptype(zlogp, &iptype) < 0) {
1124 zerror(zlogp, B_TRUE, "unable to determine ip-type");
1125 goto cleanup;
1126 }
1127 switch (iptype) {
1128 case ZS_SHARED:
1129 curr_iptype = "shared";
1130 break;
1131 case ZS_EXCLUSIVE:
1132 curr_iptype = "exclusive";
1133 break;
1134 }
1135
1136 if (brand_platform_iter_devices(bh, zone_name,
1137 mount_one_dev_device_cb, prof, curr_iptype) != 0) {
1138 zerror(zlogp, B_TRUE, "failed to add standard device");
1139 goto cleanup;
1140 }
1141
1142 if (brand_platform_iter_link(bh,
1143 mount_one_dev_symlink_cb, prof) != 0) {
1144 zerror(zlogp, B_TRUE, "failed to add standard symlink");
1145 goto cleanup;
1146 }
1147
1148 /* Add user-specified devices and directories */
1149 if ((handle = zonecfg_init_handle()) == NULL) {
1150 zerror(zlogp, B_FALSE, "can't initialize zone handle");
1151 goto cleanup;
1152 }
1153 if (err = zonecfg_get_handle(zone_name, handle)) {
1154 zerror(zlogp, B_FALSE, "can't get handle for zone "
1155 "%s: %s", zone_name, zonecfg_strerror(err));
1156 goto cleanup;
1157 }
1158 if (err = zonecfg_setdevent(handle)) {
1159 zerror(zlogp, B_FALSE, "%s: %s", zone_name,
1160 zonecfg_strerror(err));
1161 goto cleanup;
1162 }
1163 while (zonecfg_getdevent(handle, &ztab) == Z_OK) {
1164 if (di_prof_add_dev(prof, ztab.zone_dev_match)) {
1165 zerror(zlogp, B_TRUE, "failed to add "
1166 "user-specified device");
1167 goto cleanup;
1168 }
1169 }
1170 (void) zonecfg_enddevent(handle);
1171
1172 /* Send profile to kernel */
1173 if (di_prof_commit(prof)) {
1174 zerror(zlogp, B_TRUE, "failed to commit profile");
1175 goto cleanup;
1176 }
1177
1178 retval = 0;
1179
1180 cleanup:
1181 if (bh != NULL)
1182 brand_close(bh);
1183 if (handle != NULL)
1184 zonecfg_fini_handle(handle);
1185 if (prof)
1186 di_prof_fini(prof);
1187 return (retval);
1188 }
1189
1190 static int
1191 mount_one(zlog_t *zlogp, struct zone_fstab *fsptr, const char *rootpath,
1192 zone_mnt_t mount_cmd)
1193 {
1194 char path[MAXPATHLEN];
1195 char optstr[MAX_MNTOPT_STR];
1196 zone_fsopt_t *optptr;
1197 int rv;
1198
1199 if ((rv = valid_mount_path(zlogp, rootpath, fsptr->zone_fs_special,
1200 fsptr->zone_fs_dir, fsptr->zone_fs_type)) < 0) {
1201 zerror(zlogp, B_FALSE, "%s%s is not a valid mount point",
1202 rootpath, fsptr->zone_fs_dir);
1203 return (-1);
1204 } else if (rv > 0) {
1205 /* The mount point path doesn't exist, create it now. */
1206 if (make_one_dir(zlogp, rootpath, fsptr->zone_fs_dir,
1207 DEFAULT_DIR_MODE, DEFAULT_DIR_USER,
1208 DEFAULT_DIR_GROUP) != 0) {
1209 zerror(zlogp, B_FALSE, "failed to create mount point");
1210 return (-1);
1211 }
1212
1213 /*
1214 * Now this might seem weird, but we need to invoke
1215 * valid_mount_path() again. Why? Because it checks
1216 * to make sure that the mount point path is canonical,
1217 * which it can only do if the path exists, so now that
1218 * we've created the path we have to verify it again.
1219 */
1220 if ((rv = valid_mount_path(zlogp, rootpath,
1221 fsptr->zone_fs_special, fsptr->zone_fs_dir,
1222 fsptr->zone_fs_type)) < 0) {
1223 zerror(zlogp, B_FALSE,
1224 "%s%s is not a valid mount point",
1225 rootpath, fsptr->zone_fs_dir);
1226 return (-1);
1227 }
1228 }
1229
1230 (void) snprintf(path, sizeof (path), "%s%s", rootpath,
1231 fsptr->zone_fs_dir);
1232
1233 /*
1234 * In general the strategy here is to do just as much verification as
1235 * necessary to avoid crashing or otherwise doing something bad; if the
1236 * administrator initiated the operation via zoneadm(1m), he'll get
1237 * auto-verification which will let him know what's wrong. If he
1238 * modifies the zone configuration of a running zone and doesn't attempt
1239 * to verify that it's OK we won't crash but won't bother trying to be
1240 * too helpful either. zoneadm verify is only a couple keystrokes away.
1241 */
1242 if (!zonecfg_valid_fs_type(fsptr->zone_fs_type)) {
1243 zerror(zlogp, B_FALSE, "cannot mount %s on %s: "
1244 "invalid file-system type %s", fsptr->zone_fs_special,
1245 fsptr->zone_fs_dir, fsptr->zone_fs_type);
1246 return (-1);
1247 }
1248
1249 /*
1250 * If we're looking at an alternate root environment, then construct
1251 * read-only loopback mounts as necessary. Note that any special
1252 * paths for lofs zone mounts in an alternate root must have
1253 * already been pre-pended with any alternate root path by the
1254 * time we get here.
1255 */
1256 if (zonecfg_in_alt_root()) {
1257 struct stat64 st;
1258
1259 if (stat64(fsptr->zone_fs_special, &st) != -1 &&
1260 S_ISBLK(st.st_mode)) {
1261 /*
1262 * If we're going to mount a block device we need
1263 * to check if that device is already mounted
1264 * somewhere else, and if so, do a lofs mount
1265 * of the device instead of a direct mount
1266 */
1267 if (check_lofs_needed(zlogp, fsptr) == -1)
1268 return (-1);
1269 } else if (strcmp(fsptr->zone_fs_type, MNTTYPE_LOFS) == 0) {
1270 /*
1271 * For lofs mounts, the special node is inside the
1272 * alternate root. We need lofs resolution for
1273 * this case in order to get at the underlying
1274 * read-write path.
1275 */
1276 resolve_lofs(zlogp, fsptr->zone_fs_special,
1277 sizeof (fsptr->zone_fs_special));
1278 }
1279 }
1280
1281 /*
1282 * Run 'fsck -m' if there's a device to fsck.
1283 */
1284 if (fsptr->zone_fs_raw[0] != '\0' &&
1285 dofsck(zlogp, fsptr->zone_fs_type, fsptr->zone_fs_raw) != 0) {
1286 return (-1);
1287 } else if (isregfile(fsptr->zone_fs_special) == 1 &&
1288 dofsck(zlogp, fsptr->zone_fs_type, fsptr->zone_fs_special) != 0) {
1289 return (-1);
1290 }
1291
1292 /*
1293 * Build up mount option string.
1294 */
1295 optstr[0] = '\0';
1296 if (fsptr->zone_fs_options != NULL) {
1297 (void) strlcpy(optstr, fsptr->zone_fs_options->zone_fsopt_opt,
1298 sizeof (optstr));
1299 for (optptr = fsptr->zone_fs_options->zone_fsopt_next;
1300 optptr != NULL; optptr = optptr->zone_fsopt_next) {
1301 (void) strlcat(optstr, ",", sizeof (optstr));
1302 (void) strlcat(optstr, optptr->zone_fsopt_opt,
1303 sizeof (optstr));
1304 }
1305 }
1306
1307 if ((rv = domount(zlogp, fsptr->zone_fs_type, optstr,
1308 fsptr->zone_fs_special, path)) != 0)
1309 return (rv);
1310
1311 /*
1312 * The mount succeeded. If this was not a mount of /dev then
1313 * we're done.
1314 */
1315 if (strcmp(fsptr->zone_fs_type, MNTTYPE_DEV) != 0)
1316 return (0);
1317
1318 /*
1319 * We just mounted an instance of a /dev filesystem, so now we
1320 * need to configure it.
1321 */
1322 return (mount_one_dev(zlogp, path, mount_cmd));
1323 }
1324
1325 static void
1326 free_fs_data(struct zone_fstab *fsarray, uint_t nelem)
1327 {
1328 uint_t i;
1329
1330 if (fsarray == NULL)
1331 return;
1332 for (i = 0; i < nelem; i++)
1333 zonecfg_free_fs_option_list(fsarray[i].zone_fs_options);
1334 free(fsarray);
1335 }
1336
1337 /*
1338 * This function initiates the creation of a small Solaris Environment for
1339 * scratch zone. The Environment creation process is split up into two
1340 * functions(build_mounted_pre_var() and build_mounted_post_var()). It
1341 * is done this way because:
1342 * We need to have both /etc and /var in the root of the scratchzone.
1343 * We loopback mount zone's own /etc and /var into the root of the
1344 * scratch zone. Unlike /etc, /var can be a seperate filesystem. So we
1345 * need to delay the mount of /var till the zone's root gets populated.
1346 * So mounting of localdirs[](/etc and /var) have been moved to the
1347 * build_mounted_post_var() which gets called only after the zone
1348 * specific filesystems are mounted.
1349 *
1350 * Note that the scratch zone we set up for updating the zone (Z_MNT_UPDATE)
1351 * does not loopback mount the zone's own /etc and /var into the root of the
1352 * scratch zone.
1353 */
1354 static boolean_t
1355 build_mounted_pre_var(zlog_t *zlogp, char *rootpath,
1356 size_t rootlen, const char *zonepath, char *luroot, size_t lurootlen)
1357 {
1358 char tmp[MAXPATHLEN], fromdir[MAXPATHLEN];
1359 const char **cpp;
1360 static const char *mkdirs[] = {
1361 "/system", "/system/contract", "/system/object", "/proc",
1362 "/dev", "/tmp", "/a", NULL
1363 };
1364 char *altstr;
1365 FILE *fp;
1366 uuid_t uuid;
1367
1368 resolve_lofs(zlogp, rootpath, rootlen);
1369 (void) snprintf(luroot, lurootlen, "%s/lu", zonepath);
1370 resolve_lofs(zlogp, luroot, lurootlen);
1371 (void) snprintf(tmp, sizeof (tmp), "%s/bin", luroot);
1372 (void) symlink("./usr/bin", tmp);
1373
1374 /*
1375 * These are mostly special mount points; not handled here. (See
1376 * zone_mount_early.)
1377 */
1378 for (cpp = mkdirs; *cpp != NULL; cpp++) {
1379 (void) snprintf(tmp, sizeof (tmp), "%s%s", luroot, *cpp);
1380 if (mkdir(tmp, 0755) != 0) {
1381 zerror(zlogp, B_TRUE, "cannot create %s", tmp);
1382 return (B_FALSE);
1383 }
1384 }
1385 /*
1386 * This is here to support lucopy. If there's an instance of this same
1387 * zone on the current running system, then we mount its root up as
1388 * read-only inside the scratch zone.
1389 */
1390 (void) zonecfg_get_uuid(zone_name, uuid);
1391 altstr = strdup(zonecfg_get_root());
1392 if (altstr == NULL) {
1393 zerror(zlogp, B_TRUE, "memory allocation failed");
1394 return (B_FALSE);
1395 }
1396 zonecfg_set_root("");
1397 (void) strlcpy(tmp, zone_name, sizeof (tmp));
1398 (void) zonecfg_get_name_by_uuid(uuid, tmp, sizeof (tmp));
1399 if (zone_get_rootpath(tmp, fromdir, sizeof (fromdir)) == Z_OK &&
1400 strcmp(fromdir, rootpath) != 0) {
1401 (void) snprintf(tmp, sizeof (tmp), "%s/b", luroot);
1402 if (mkdir(tmp, 0755) != 0) {
1403 zerror(zlogp, B_TRUE, "cannot create %s", tmp);
1404 return (B_FALSE);
1405 }
1406 if (domount(zlogp, MNTTYPE_LOFS, RESOURCE_DEFAULT_OPTS, fromdir,
1407 tmp) != 0) {
1408 zerror(zlogp, B_TRUE, "cannot mount %s on %s", tmp,
1409 fromdir);
1410 return (B_FALSE);
1411 }
1412 }
1413 zonecfg_set_root(altstr);
1414 free(altstr);
1415
1416 if ((fp = zonecfg_open_scratch(luroot, B_TRUE)) == NULL) {
1417 zerror(zlogp, B_TRUE, "cannot open zone mapfile");
1418 return (B_FALSE);
1419 }
1420 (void) ftruncate(fileno(fp), 0);
1421 if (zonecfg_add_scratch(fp, zone_name, kernzone, "/") == -1) {
1422 zerror(zlogp, B_TRUE, "cannot add zone mapfile entry");
1423 }
1424 zonecfg_close_scratch(fp);
1425 (void) snprintf(tmp, sizeof (tmp), "%s/a", luroot);
1426 if (domount(zlogp, MNTTYPE_LOFS, "", rootpath, tmp) != 0)
1427 return (B_FALSE);
1428 (void) strlcpy(rootpath, tmp, rootlen);
1429 return (B_TRUE);
1430 }
1431
1432
1433 static boolean_t
1434 build_mounted_post_var(zlog_t *zlogp, zone_mnt_t mount_cmd, char *rootpath,
1435 const char *luroot)
1436 {
1437 char tmp[MAXPATHLEN], fromdir[MAXPATHLEN];
1438 const char **cpp;
1439 const char **loopdirs;
1440 const char **tmpdirs;
1441 static const char *localdirs[] = {
1442 "/etc", "/var", NULL
1443 };
1444 static const char *scr_loopdirs[] = {
1445 "/etc/lib", "/etc/fs", "/lib", "/sbin", "/platform",
1446 "/usr", NULL
1447 };
1448 static const char *upd_loopdirs[] = {
1449 "/etc", "/kernel", "/lib", "/opt", "/platform", "/sbin",
1450 "/usr", "/var", NULL
1451 };
1452 static const char *scr_tmpdirs[] = {
1453 "/tmp", "/var/run", NULL
1454 };
1455 static const char *upd_tmpdirs[] = {
1456 "/tmp", "/var/run", "/var/tmp", NULL
1457 };
1458 struct stat st;
1459
1460 if (mount_cmd == Z_MNT_SCRATCH) {
1461 /*
1462 * These are mounted read-write from the zone undergoing
1463 * upgrade. We must be careful not to 'leak' things from the
1464 * main system into the zone, and this accomplishes that goal.
1465 */
1466 for (cpp = localdirs; *cpp != NULL; cpp++) {
1467 (void) snprintf(tmp, sizeof (tmp), "%s%s", luroot,
1468 *cpp);
1469 (void) snprintf(fromdir, sizeof (fromdir), "%s%s",
1470 rootpath, *cpp);
1471 if (mkdir(tmp, 0755) != 0) {
1472 zerror(zlogp, B_TRUE, "cannot create %s", tmp);
1473 return (B_FALSE);
1474 }
1475 if (domount(zlogp, MNTTYPE_LOFS, "", fromdir, tmp)
1476 != 0) {
1477 zerror(zlogp, B_TRUE, "cannot mount %s on %s",
1478 tmp, *cpp);
1479 return (B_FALSE);
1480 }
1481 }
1482 }
1483
1484 if (mount_cmd == Z_MNT_UPDATE)
1485 loopdirs = upd_loopdirs;
1486 else
1487 loopdirs = scr_loopdirs;
1488
1489 /*
1490 * These are things mounted read-only from the running system because
1491 * they contain binaries that must match system.
1492 */
1493 for (cpp = loopdirs; *cpp != NULL; cpp++) {
1494 (void) snprintf(tmp, sizeof (tmp), "%s%s", luroot, *cpp);
1495 if (mkdir(tmp, 0755) != 0) {
1496 if (errno != EEXIST) {
1497 zerror(zlogp, B_TRUE, "cannot create %s", tmp);
1498 return (B_FALSE);
1499 }
1500 if (lstat(tmp, &st) != 0) {
1501 zerror(zlogp, B_TRUE, "cannot stat %s", tmp);
1502 return (B_FALSE);
1503 }
1504 /*
1505 * Ignore any non-directories encountered. These are
1506 * things that have been converted into symlinks
1507 * (/etc/fs and /etc/lib) and no longer need a lofs
1508 * fixup.
1509 */
1510 if (!S_ISDIR(st.st_mode))
1511 continue;
1512 }
1513 if (domount(zlogp, MNTTYPE_LOFS, RESOURCE_DEFAULT_OPTS, *cpp,
1514 tmp) != 0) {
1515 zerror(zlogp, B_TRUE, "cannot mount %s on %s", tmp,
1516 *cpp);
1517 return (B_FALSE);
1518 }
1519 }
1520
1521 if (mount_cmd == Z_MNT_UPDATE)
1522 tmpdirs = upd_tmpdirs;
1523 else
1524 tmpdirs = scr_tmpdirs;
1525
1526 /*
1527 * These are things with tmpfs mounted inside.
1528 */
1529 for (cpp = tmpdirs; *cpp != NULL; cpp++) {
1530 (void) snprintf(tmp, sizeof (tmp), "%s%s", luroot, *cpp);
1531 if (mount_cmd == Z_MNT_SCRATCH && mkdir(tmp, 0755) != 0 &&
1532 errno != EEXIST) {
1533 zerror(zlogp, B_TRUE, "cannot create %s", tmp);
1534 return (B_FALSE);
1535 }
1536
1537 /*
1538 * We could set the mode for /tmp when we do the mkdir but
1539 * since that can be modified by the umask we will just set
1540 * the correct mode for /tmp now.
1541 */
1542 if (strcmp(*cpp, "/tmp") == 0 && chmod(tmp, 01777) != 0) {
1543 zerror(zlogp, B_TRUE, "cannot chmod %s", tmp);
1544 return (B_FALSE);
1545 }
1546
1547 if (domount(zlogp, MNTTYPE_TMPFS, "", "swap", tmp) != 0) {
1548 zerror(zlogp, B_TRUE, "cannot mount swap on %s", *cpp);
1549 return (B_FALSE);
1550 }
1551 }
1552 return (B_TRUE);
1553 }
1554
1555 typedef struct plat_gmount_cb_data {
1556 zlog_t *pgcd_zlogp;
1557 struct zone_fstab **pgcd_fs_tab;
1558 int *pgcd_num_fs;
1559 } plat_gmount_cb_data_t;
1560
1561 /*
1562 * plat_gmount_cb() is a callback function invoked by libbrand to iterate
1563 * through all global brand platform mounts.
1564 */
1565 int
1566 plat_gmount_cb(void *data, const char *spec, const char *dir,
1567 const char *fstype, const char *opt)
1568 {
1569 plat_gmount_cb_data_t *cp = data;
1570 zlog_t *zlogp = cp->pgcd_zlogp;
1571 struct zone_fstab *fs_ptr = *cp->pgcd_fs_tab;
1572 int num_fs = *cp->pgcd_num_fs;
1573 struct zone_fstab *fsp, *tmp_ptr;
1574
1575 num_fs++;
1576 if ((tmp_ptr = realloc(fs_ptr, num_fs * sizeof (*tmp_ptr))) == NULL) {
1577 zerror(zlogp, B_TRUE, "memory allocation failed");
1578 return (-1);
1579 }
1580
1581 fs_ptr = tmp_ptr;
1582 fsp = &fs_ptr[num_fs - 1];
1583
1584 /* update the callback struct passed in */
1585 *cp->pgcd_fs_tab = fs_ptr;
1586 *cp->pgcd_num_fs = num_fs;
1587
1588 fsp->zone_fs_raw[0] = '\0';
1589 (void) strlcpy(fsp->zone_fs_special, spec,
1590 sizeof (fsp->zone_fs_special));
1591 (void) strlcpy(fsp->zone_fs_dir, dir, sizeof (fsp->zone_fs_dir));
1592 (void) strlcpy(fsp->zone_fs_type, fstype, sizeof (fsp->zone_fs_type));
1593 fsp->zone_fs_options = NULL;
1594 if ((opt != NULL) &&
1595 (zonecfg_add_fs_option(fsp, (char *)opt) != Z_OK)) {
1596 zerror(zlogp, B_FALSE, "error adding property");
1597 return (-1);
1598 }
1599
1600 return (0);
1601 }
1602
1603 static int
1604 mount_filesystems_fsent(zone_dochandle_t handle, zlog_t *zlogp,
1605 struct zone_fstab **fs_tabp, int *num_fsp, zone_mnt_t mount_cmd)
1606 {
1607 struct zone_fstab *tmp_ptr, *fs_ptr, *fsp, fstab;
1608 int num_fs;
1609
1610 num_fs = *num_fsp;
1611 fs_ptr = *fs_tabp;
1612
1613 if (zonecfg_setfsent(handle) != Z_OK) {
1614 zerror(zlogp, B_FALSE, "invalid configuration");
1615 return (-1);
1616 }
1617 while (zonecfg_getfsent(handle, &fstab) == Z_OK) {
1618 /*
1619 * ZFS filesystems will not be accessible under an alternate
1620 * root, since the pool will not be known. Ignore them in this
1621 * case.
1622 */
1623 if (ALT_MOUNT(mount_cmd) &&
1624 strcmp(fstab.zone_fs_type, MNTTYPE_ZFS) == 0)
1625 continue;
1626
1627 num_fs++;
1628 if ((tmp_ptr = realloc(fs_ptr,
1629 num_fs * sizeof (*tmp_ptr))) == NULL) {
1630 zerror(zlogp, B_TRUE, "memory allocation failed");
1631 (void) zonecfg_endfsent(handle);
1632 return (-1);
1633 }
1634 /* update the pointers passed in */
1635 *fs_tabp = tmp_ptr;
1636 *num_fsp = num_fs;
1637
1638 fs_ptr = tmp_ptr;
1639 fsp = &fs_ptr[num_fs - 1];
1640 (void) strlcpy(fsp->zone_fs_dir,
1641 fstab.zone_fs_dir, sizeof (fsp->zone_fs_dir));
1642 (void) strlcpy(fsp->zone_fs_raw, fstab.zone_fs_raw,
1643 sizeof (fsp->zone_fs_raw));
1644 (void) strlcpy(fsp->zone_fs_type, fstab.zone_fs_type,
1645 sizeof (fsp->zone_fs_type));
1646 fsp->zone_fs_options = fstab.zone_fs_options;
1647
1648 /*
1649 * For all lofs mounts, make sure that the 'special'
1650 * entry points inside the alternate root. The
1651 * source path for a lofs mount in a given zone needs
1652 * to be relative to the root of the boot environment
1653 * that contains the zone. Note that we don't do this
1654 * for non-lofs mounts since they will have a device
1655 * as a backing store and device paths must always be
1656 * specified relative to the current boot environment.
1657 */
1658 fsp->zone_fs_special[0] = '\0';
1659 if (strcmp(fsp->zone_fs_type, MNTTYPE_LOFS) == 0) {
1660 (void) strlcat(fsp->zone_fs_special, zonecfg_get_root(),
1661 sizeof (fsp->zone_fs_special));
1662 }
1663 (void) strlcat(fsp->zone_fs_special, fstab.zone_fs_special,
1664 sizeof (fsp->zone_fs_special));
1665 }
1666 (void) zonecfg_endfsent(handle);
1667 return (0);
1668 }
1669
1670 static int
1671 mount_filesystems(zlog_t *zlogp, zone_mnt_t mount_cmd)
1672 {
1673 char rootpath[MAXPATHLEN];
1674 char zonepath[MAXPATHLEN];
1675 char brand[MAXNAMELEN];
1676 char luroot[MAXPATHLEN];
1677 int i, num_fs = 0;
1678 struct zone_fstab *fs_ptr = NULL;
1679 zone_dochandle_t handle = NULL;
1680 zone_state_t zstate;
1681 brand_handle_t bh;
1682 plat_gmount_cb_data_t cb;
1683
1684 if (zone_get_state(zone_name, &zstate) != Z_OK ||
1685 (zstate != ZONE_STATE_READY && zstate != ZONE_STATE_MOUNTED)) {
1686 zerror(zlogp, B_FALSE,
1687 "zone must be in '%s' or '%s' state to mount file-systems",
1688 zone_state_str(ZONE_STATE_READY),
1689 zone_state_str(ZONE_STATE_MOUNTED));
1690 goto bad;
1691 }
1692
1693 if (zone_get_zonepath(zone_name, zonepath, sizeof (zonepath)) != Z_OK) {
1694 zerror(zlogp, B_TRUE, "unable to determine zone path");
1695 goto bad;
1696 }
1697
1698 if (zone_get_rootpath(zone_name, rootpath, sizeof (rootpath)) != Z_OK) {
1699 zerror(zlogp, B_TRUE, "unable to determine zone root");
1700 goto bad;
1701 }
1702
1703 if ((handle = zonecfg_init_handle()) == NULL) {
1704 zerror(zlogp, B_TRUE, "getting zone configuration handle");
1705 goto bad;
1706 }
1707 if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK ||
1708 zonecfg_setfsent(handle) != Z_OK) {
1709 zerror(zlogp, B_FALSE, "invalid configuration");
1710 goto bad;
1711 }
1712
1713 /*
1714 * If we are mounting the zone, then we must always use the default
1715 * brand global mounts.
1716 */
1717 if (ALT_MOUNT(mount_cmd)) {
1718 (void) strlcpy(brand, default_brand, sizeof (brand));
1719 } else {
1720 (void) strlcpy(brand, brand_name, sizeof (brand));
1721 }
1722
1723 /* Get a handle to the brand info for this zone */
1724 if ((bh = brand_open(brand)) == NULL) {
1725 zerror(zlogp, B_FALSE, "unable to determine zone brand");
1726 zonecfg_fini_handle(handle);
1727 return (-1);
1728 }
1729
1730 /*
1731 * Get the list of global filesystems to mount from the brand
1732 * configuration.
1733 */
1734 cb.pgcd_zlogp = zlogp;
1735 cb.pgcd_fs_tab = &fs_ptr;
1736 cb.pgcd_num_fs = &num_fs;
1737 if (brand_platform_iter_gmounts(bh, zonepath,
1738 plat_gmount_cb, &cb) != 0) {
1739 zerror(zlogp, B_FALSE, "unable to mount filesystems");
1740 brand_close(bh);
1741 zonecfg_fini_handle(handle);
1742 return (-1);
1743 }
1744 brand_close(bh);
1745
1746 /*
1747 * Iterate through the rest of the filesystems. Sort them all,
1748 * then mount them in sorted order. This is to make sure the
1749 * higher level directories (e.g., /usr) get mounted before
1750 * any beneath them (e.g., /usr/local).
1751 */
1752 if (mount_filesystems_fsent(handle, zlogp, &fs_ptr, &num_fs,
1753 mount_cmd) != 0)
1754 goto bad;
1755
1756 zonecfg_fini_handle(handle);
1757 handle = NULL;
1758
1759 /*
1760 * Normally when we mount a zone all the zone filesystems
1761 * get mounted relative to rootpath, which is usually
1762 * <zonepath>/root. But when mounting a zone for administration
1763 * purposes via the zone "mount" state, build_mounted_pre_var()
1764 * updates rootpath to be <zonepath>/lu/a so we'll mount all
1765 * the zones filesystems there instead.
1766 *
1767 * build_mounted_pre_var() and build_mounted_post_var() will
1768 * also do some extra work to create directories and lofs mount
1769 * a bunch of global zone file system paths into <zonepath>/lu.
1770 *
1771 * This allows us to be able to enter the zone (now rooted at
1772 * <zonepath>/lu) and run the upgrade/patch tools that are in the
1773 * global zone and have them upgrade the to-be-modified zone's
1774 * files mounted on /a. (Which mirrors the existing standard
1775 * upgrade environment.)
1776 *
1777 * There is of course one catch. When doing the upgrade
1778 * we need <zoneroot>/lu/dev to be the /dev filesystem
1779 * for the zone and we don't want to have any /dev filesystem
1780 * mounted at <zoneroot>/lu/a/dev. Since /dev is specified
1781 * as a normal zone filesystem by default we'll try to mount
1782 * it at <zoneroot>/lu/a/dev, so we have to detect this
1783 * case and instead mount it at <zoneroot>/lu/dev.
1784 *
1785 * All this work is done in three phases:
1786 * 1) Create and populate lu directory (build_mounted_pre_var()).
1787 * 2) Mount the required filesystems as per the zone configuration.
1788 * 3) Set up the rest of the scratch zone environment
1789 * (build_mounted_post_var()).
1790 */
1791 if (ALT_MOUNT(mount_cmd) && !build_mounted_pre_var(zlogp,
1792 rootpath, sizeof (rootpath), zonepath, luroot, sizeof (luroot)))
1793 goto bad;
1794
1795 qsort(fs_ptr, num_fs, sizeof (*fs_ptr), fs_compare);
1796
1797 for (i = 0; i < num_fs; i++) {
1798 if (ALT_MOUNT(mount_cmd) &&
1799 strcmp(fs_ptr[i].zone_fs_dir, "/dev") == 0) {
1800 size_t slen = strlen(rootpath) - 2;
1801
1802 /*
1803 * By default we'll try to mount /dev as /a/dev
1804 * but /dev is special and always goes at the top
1805 * so strip the trailing '/a' from the rootpath.
1806 */
1807 assert(strcmp(&rootpath[slen], "/a") == 0);
1808 rootpath[slen] = '\0';
1809 if (mount_one(zlogp, &fs_ptr[i], rootpath, mount_cmd)
1810 != 0)
1811 goto bad;
1812 rootpath[slen] = '/';
1813 continue;
1814 }
1815 if (mount_one(zlogp, &fs_ptr[i], rootpath, mount_cmd) != 0)
1816 goto bad;
1817 }
1818 if (ALT_MOUNT(mount_cmd) &&
1819 !build_mounted_post_var(zlogp, mount_cmd, rootpath, luroot))
1820 goto bad;
1821
1822 /*
1823 * For Trusted Extensions cross-mount each lower level /export/home
1824 */
1825 if (mount_cmd == Z_MNT_BOOT &&
1826 tsol_mounts(zlogp, zone_name, rootpath) != 0)
1827 goto bad;
1828
1829 free_fs_data(fs_ptr, num_fs);
1830
1831 /*
1832 * Everything looks fine.
1833 */
1834 return (0);
1835
1836 bad:
1837 if (handle != NULL)
1838 zonecfg_fini_handle(handle);
1839 free_fs_data(fs_ptr, num_fs);
1840 return (-1);
1841 }
1842
1843 /* caller makes sure neither parameter is NULL */
1844 static int
1845 addr2netmask(char *prefixstr, int maxprefixlen, uchar_t *maskstr)
1846 {
1847 int prefixlen;
1848
1849 prefixlen = atoi(prefixstr);
1850 if (prefixlen < 0 || prefixlen > maxprefixlen)
1851 return (1);
1852 while (prefixlen > 0) {
1853 if (prefixlen >= 8) {
1854 *maskstr++ = 0xFF;
1855 prefixlen -= 8;
1856 continue;
1857 }
1858 *maskstr |= 1 << (8 - prefixlen);
1859 prefixlen--;
1860 }
1861 return (0);
1862 }
1863
1864 /*
1865 * Tear down all interfaces belonging to the given zone. This should
1866 * be called with the zone in a state other than "running", so that
1867 * interfaces can't be assigned to the zone after this returns.
1868 *
1869 * If anything goes wrong, log an error message and return an error.
1870 */
1871 static int
1872 unconfigure_shared_network_interfaces(zlog_t *zlogp, zoneid_t zone_id)
1873 {
1874 struct lifnum lifn;
1875 struct lifconf lifc;
1876 struct lifreq *lifrp, lifrl;
1877 int64_t lifc_flags = LIFC_NOXMIT | LIFC_ALLZONES;
1878 int num_ifs, s, i, ret_code = 0;
1879 uint_t bufsize;
1880 char *buf = NULL;
1881
1882 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1883 zerror(zlogp, B_TRUE, "could not get socket");
1884 ret_code = -1;
1885 goto bad;
1886 }
1887 lifn.lifn_family = AF_UNSPEC;
1888 lifn.lifn_flags = (int)lifc_flags;
1889 if (ioctl(s, SIOCGLIFNUM, (char *)&lifn) < 0) {
1890 zerror(zlogp, B_TRUE,
1891 "could not determine number of network interfaces");
1892 ret_code = -1;
1893 goto bad;
1894 }
1895 num_ifs = lifn.lifn_count;
1896 bufsize = num_ifs * sizeof (struct lifreq);
1897 if ((buf = malloc(bufsize)) == NULL) {
1898 zerror(zlogp, B_TRUE, "memory allocation failed");
1899 ret_code = -1;
1900 goto bad;
1901 }
1902 lifc.lifc_family = AF_UNSPEC;
1903 lifc.lifc_flags = (int)lifc_flags;
1904 lifc.lifc_len = bufsize;
1905 lifc.lifc_buf = buf;
1906 if (ioctl(s, SIOCGLIFCONF, (char *)&lifc) < 0) {
1907 zerror(zlogp, B_TRUE, "could not get configured network "
1908 "interfaces");
1909 ret_code = -1;
1910 goto bad;
1911 }
1912 lifrp = lifc.lifc_req;
1913 for (i = lifc.lifc_len / sizeof (struct lifreq); i > 0; i--, lifrp++) {
1914 (void) close(s);
1915 if ((s = socket(lifrp->lifr_addr.ss_family, SOCK_DGRAM, 0)) <
1916 0) {
1917 zerror(zlogp, B_TRUE, "%s: could not get socket",
1918 lifrl.lifr_name);
1919 ret_code = -1;
1920 continue;
1921 }
1922 (void) memset(&lifrl, 0, sizeof (lifrl));
1923 (void) strncpy(lifrl.lifr_name, lifrp->lifr_name,
1924 sizeof (lifrl.lifr_name));
1925 if (ioctl(s, SIOCGLIFZONE, (caddr_t)&lifrl) < 0) {
1926 if (errno == ENXIO)
1927 /*
1928 * Interface may have been removed by admin or
1929 * another zone halting.
1930 */
1931 continue;
1932 zerror(zlogp, B_TRUE,
1933 "%s: could not determine the zone to which this "
1934 "network interface is bound", lifrl.lifr_name);
1935 ret_code = -1;
1936 continue;
1937 }
1938 if (lifrl.lifr_zoneid == zone_id) {
1939 if (ioctl(s, SIOCLIFREMOVEIF, (caddr_t)&lifrl) < 0) {
1940 zerror(zlogp, B_TRUE,
1941 "%s: could not remove network interface",
1942 lifrl.lifr_name);
1943 ret_code = -1;
1944 continue;
1945 }
1946 }
1947 }
1948 bad:
1949 if (s > 0)
1950 (void) close(s);
1951 if (buf)
1952 free(buf);
1953 return (ret_code);
1954 }
1955
1956 static union sockunion {
1957 struct sockaddr sa;
1958 struct sockaddr_in sin;
1959 struct sockaddr_dl sdl;
1960 struct sockaddr_in6 sin6;
1961 } so_dst, so_ifp;
1962
1963 static struct {
1964 struct rt_msghdr hdr;
1965 char space[512];
1966 } rtmsg;
1967
1968 static int
1969 salen(struct sockaddr *sa)
1970 {
1971 switch (sa->sa_family) {
1972 case AF_INET:
1973 return (sizeof (struct sockaddr_in));
1974 case AF_LINK:
1975 return (sizeof (struct sockaddr_dl));
1976 case AF_INET6:
1977 return (sizeof (struct sockaddr_in6));
1978 default:
1979 return (sizeof (struct sockaddr));
1980 }
1981 }
1982
1983 #define ROUNDUP_LONG(a) \
1984 ((a) > 0 ? (1 + (((a) - 1) | (sizeof (long) - 1))) : sizeof (long))
1985
1986 /*
1987 * Look up which zone is using a given IP address. The address in question
1988 * is expected to have been stuffed into the structure to which lifr points
1989 * via a previous SIOCGLIFADDR ioctl().
1990 *
1991 * This is done using black router socket magic.
1992 *
1993 * Return the name of the zone on success or NULL on failure.
1994 *
1995 * This is a lot of code for a simple task; a new ioctl request to take care
1996 * of this might be a useful RFE.
1997 */
1998
1999 static char *
2000 who_is_using(zlog_t *zlogp, struct lifreq *lifr)
2001 {
2002 static char answer[ZONENAME_MAX];
2003 pid_t pid;
2004 int s, rlen, l, i;
2005 char *cp = rtmsg.space;
2006 struct sockaddr_dl *ifp = NULL;
2007 struct sockaddr *sa;
2008 char save_if_name[LIFNAMSIZ];
2009
2010 answer[0] = '\0';
2011
2012 pid = getpid();
2013 if ((s = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) {
2014 zerror(zlogp, B_TRUE, "could not get routing socket");
2015 return (NULL);
2016 }
2017
2018 if (lifr->lifr_addr.ss_family == AF_INET) {
2019 struct sockaddr_in *sin4;
2020
2021 so_dst.sa.sa_family = AF_INET;
2022 sin4 = (struct sockaddr_in *)&lifr->lifr_addr;
2023 so_dst.sin.sin_addr = sin4->sin_addr;
2024 } else {
2025 struct sockaddr_in6 *sin6;
2026
2027 so_dst.sa.sa_family = AF_INET6;
2028 sin6 = (struct sockaddr_in6 *)&lifr->lifr_addr;
2029 so_dst.sin6.sin6_addr = sin6->sin6_addr;
2030 }
2031
2032 so_ifp.sa.sa_family = AF_LINK;
2033
2034 (void) memset(&rtmsg, 0, sizeof (rtmsg));
2035 rtmsg.hdr.rtm_type = RTM_GET;
2036 rtmsg.hdr.rtm_flags = RTF_UP | RTF_HOST;
2037 rtmsg.hdr.rtm_version = RTM_VERSION;
2038 rtmsg.hdr.rtm_seq = ++rts_seqno;
2039 rtmsg.hdr.rtm_addrs = RTA_IFP | RTA_DST;
2040
2041 l = ROUNDUP_LONG(salen(&so_dst.sa));
2042 (void) memmove(cp, &(so_dst), l);
2043 cp += l;
2044 l = ROUNDUP_LONG(salen(&so_ifp.sa));
2045 (void) memmove(cp, &(so_ifp), l);
2046 cp += l;
2047
2048 rtmsg.hdr.rtm_msglen = l = cp - (char *)&rtmsg;
2049
2050 if ((rlen = write(s, &rtmsg, l)) < 0) {
2051 zerror(zlogp, B_TRUE, "writing to routing socket");
2052 return (NULL);
2053 } else if (rlen < (int)rtmsg.hdr.rtm_msglen) {
2054 zerror(zlogp, B_TRUE,
2055 "write to routing socket got only %d for len\n", rlen);
2056 return (NULL);
2057 }
2058 do {
2059 l = read(s, &rtmsg, sizeof (rtmsg));
2060 } while (l > 0 && (rtmsg.hdr.rtm_seq != rts_seqno ||
2061 rtmsg.hdr.rtm_pid != pid));
2062 if (l < 0) {
2063 zerror(zlogp, B_TRUE, "reading from routing socket");
2064 return (NULL);
2065 }
2066
2067 if (rtmsg.hdr.rtm_version != RTM_VERSION) {
2068 zerror(zlogp, B_FALSE,
2069 "routing message version %d not understood",
2070 rtmsg.hdr.rtm_version);
2071 return (NULL);
2072 }
2073 if (rtmsg.hdr.rtm_msglen != (ushort_t)l) {
2074 zerror(zlogp, B_FALSE, "message length mismatch, "
2075 "expected %d bytes, returned %d bytes",
2076 rtmsg.hdr.rtm_msglen, l);
2077 return (NULL);
2078 }
2079 if (rtmsg.hdr.rtm_errno != 0) {
2080 errno = rtmsg.hdr.rtm_errno;
2081 zerror(zlogp, B_TRUE, "RTM_GET routing socket message");
2082 return (NULL);
2083 }
2084 if ((rtmsg.hdr.rtm_addrs & RTA_IFP) == 0) {
2085 zerror(zlogp, B_FALSE, "network interface not found");
2086 return (NULL);
2087 }
2088 cp = ((char *)(&rtmsg.hdr + 1));
2089 for (i = 1; i != 0; i <<= 1) {
2090 /* LINTED E_BAD_PTR_CAST_ALIGN */
2091 sa = (struct sockaddr *)cp;
2092 if (i != RTA_IFP) {
2093 if ((i & rtmsg.hdr.rtm_addrs) != 0)
2094 cp += ROUNDUP_LONG(salen(sa));
2095 continue;
2096 }
2097 if (sa->sa_family == AF_LINK &&
2098 ((struct sockaddr_dl *)sa)->sdl_nlen != 0)
2099 ifp = (struct sockaddr_dl *)sa;
2100 break;
2101 }
2102 if (ifp == NULL) {
2103 zerror(zlogp, B_FALSE, "network interface could not be "
2104 "determined");
2105 return (NULL);
2106 }
2107
2108 /*
2109 * We need to set the I/F name to what we got above, then do the
2110 * appropriate ioctl to get its zone name. But lifr->lifr_name is
2111 * used by the calling function to do a REMOVEIF, so if we leave the
2112 * "good" zone's I/F name in place, *that* I/F will be removed instead
2113 * of the bad one. So we save the old (bad) I/F name before over-
2114 * writing it and doing the ioctl, then restore it after the ioctl.
2115 */
2116 (void) strlcpy(save_if_name, lifr->lifr_name, sizeof (save_if_name));
2117 (void) strncpy(lifr->lifr_name, ifp->sdl_data, ifp->sdl_nlen);
2118 lifr->lifr_name[ifp->sdl_nlen] = '\0';
2119 i = ioctl(s, SIOCGLIFZONE, lifr);
2120 (void) strlcpy(lifr->lifr_name, save_if_name, sizeof (save_if_name));
2121 if (i < 0) {
2122 zerror(zlogp, B_TRUE,
2123 "%s: could not determine the zone network interface "
2124 "belongs to", lifr->lifr_name);
2125 return (NULL);
2126 }
2127 if (getzonenamebyid(lifr->lifr_zoneid, answer, sizeof (answer)) < 0)
2128 (void) snprintf(answer, sizeof (answer), "%d",
2129 lifr->lifr_zoneid);
2130
2131 if (strlen(answer) > 0)
2132 return (answer);
2133 return (NULL);
2134 }
2135
2136 /*
2137 * Configures a single interface: a new virtual interface is added, based on
2138 * the physical interface nwiftabptr->zone_nwif_physical, with the address
2139 * specified in nwiftabptr->zone_nwif_address, for zone zone_id. Note that
2140 * the "address" can be an IPv6 address (with a /prefixlength required), an
2141 * IPv4 address (with a /prefixlength optional), or a name; for the latter,
2142 * an IPv4 name-to-address resolution will be attempted.
2143 *
2144 * If anything goes wrong, we log an detailed error message, attempt to tear
2145 * down whatever we set up and return an error.
2146 */
2147 static int
2148 configure_one_interface(zlog_t *zlogp, zoneid_t zone_id,
2149 struct zone_nwiftab *nwiftabptr)
2150 {
2151 struct lifreq lifr;
2152 struct sockaddr_in netmask4;
2153 struct sockaddr_in6 netmask6;
2154 struct sockaddr_storage laddr;
2155 struct in_addr in4;
2156 sa_family_t af;
2157 char *slashp = strchr(nwiftabptr->zone_nwif_address, '/');
2158 int s;
2159 boolean_t got_netmask = B_FALSE;
2160 boolean_t is_loopback = B_FALSE;
2161 char addrstr4[INET_ADDRSTRLEN];
2162 int res;
2163
2164 res = zonecfg_valid_net_address(nwiftabptr->zone_nwif_address, &lifr);
2165 if (res != Z_OK) {
2166 zerror(zlogp, B_FALSE, "%s: %s", zonecfg_strerror(res),
2167 nwiftabptr->zone_nwif_address);
2168 return (-1);
2169 }
2170 af = lifr.lifr_addr.ss_family;
2171 if (af == AF_INET)
2172 in4 = ((struct sockaddr_in *)(&lifr.lifr_addr))->sin_addr;
2173 if ((s = socket(af, SOCK_DGRAM, 0)) < 0) {
2174 zerror(zlogp, B_TRUE, "could not get socket");
2175 return (-1);
2176 }
2177
2178 /*
2179 * This is a similar kind of "hack" like in addif() to get around
2180 * the problem of SIOCLIFADDIF. The problem is that this ioctl
2181 * does not include the netmask when adding a logical interface.
2182 * To get around this problem, we first add the logical interface
2183 * with a 0 address. After that, we set the netmask if provided.
2184 * Finally we set the interface address.
2185 */
2186 laddr = lifr.lifr_addr;
2187 (void) strlcpy(lifr.lifr_name, nwiftabptr->zone_nwif_physical,
2188 sizeof (lifr.lifr_name));
2189 (void) memset(&lifr.lifr_addr, 0, sizeof (lifr.lifr_addr));
2190
2191 if (ioctl(s, SIOCLIFADDIF, (caddr_t)&lifr) < 0) {
2192 /*
2193 * Here, we know that the interface can't be brought up.
2194 * A similar warning message was already printed out to
2195 * the console by zoneadm(1M) so instead we log the
2196 * message to syslog and continue.
2197 */
2198 zerror(&logsys, B_TRUE, "WARNING: skipping network interface "
2199 "'%s' which may not be present/plumbed in the "
2200 "global zone.", lifr.lifr_name);
2201 (void) close(s);
2202 return (Z_OK);
2203 }
2204
2205 /* Preserve literal IPv4 address for later potential printing. */
2206 if (af == AF_INET)
2207 (void) inet_ntop(AF_INET, &in4, addrstr4, INET_ADDRSTRLEN);
2208
2209 lifr.lifr_zoneid = zone_id;
2210 if (ioctl(s, SIOCSLIFZONE, (caddr_t)&lifr) < 0) {
2211 zerror(zlogp, B_TRUE, "%s: could not place network interface "
2212 "into zone", lifr.lifr_name);
2213 goto bad;
2214 }
2215
2216 /*
2217 * Loopback interface will use the default netmask assigned, if no
2218 * netmask is found.
2219 */
2220 if (strcmp(nwiftabptr->zone_nwif_physical, "lo0") == 0) {
2221 is_loopback = B_TRUE;
2222 }
2223 if (af == AF_INET) {
2224 /*
2225 * The IPv4 netmask can be determined either
2226 * directly if a prefix length was supplied with
2227 * the address or via the netmasks database. Not
2228 * being able to determine it is a common failure,
2229 * but it often is not fatal to operation of the
2230 * interface. In that case, a warning will be
2231 * printed after the rest of the interface's
2232 * parameters have been configured.
2233 */
2234 (void) memset(&netmask4, 0, sizeof (netmask4));
2235 if (slashp != NULL) {
2236 if (addr2netmask(slashp + 1, V4_ADDR_LEN,
2237 (uchar_t *)&netmask4.sin_addr) != 0) {
2238 *slashp = '/';
2239 zerror(zlogp, B_FALSE,
2240 "%s: invalid prefix length in %s",
2241 lifr.lifr_name,
2242 nwiftabptr->zone_nwif_address);
2243 goto bad;
2244 }
2245 got_netmask = B_TRUE;
2246 } else if (getnetmaskbyaddr(in4,
2247 &netmask4.sin_addr) == 0) {
2248 got_netmask = B_TRUE;
2249 }
2250 if (got_netmask) {
2251 netmask4.sin_family = af;
2252 (void) memcpy(&lifr.lifr_addr, &netmask4,
2253 sizeof (netmask4));
2254 }
2255 } else {
2256 (void) memset(&netmask6, 0, sizeof (netmask6));
2257 if (addr2netmask(slashp + 1, V6_ADDR_LEN,
2258 (uchar_t *)&netmask6.sin6_addr) != 0) {
2259 *slashp = '/';
2260 zerror(zlogp, B_FALSE,
2261 "%s: invalid prefix length in %s",
2262 lifr.lifr_name,
2263 nwiftabptr->zone_nwif_address);
2264 goto bad;
2265 }
2266 got_netmask = B_TRUE;
2267 netmask6.sin6_family = af;
2268 (void) memcpy(&lifr.lifr_addr, &netmask6,
2269 sizeof (netmask6));
2270 }
2271 if (got_netmask &&
2272 ioctl(s, SIOCSLIFNETMASK, (caddr_t)&lifr) < 0) {
2273 zerror(zlogp, B_TRUE, "%s: could not set netmask",
2274 lifr.lifr_name);
2275 goto bad;
2276 }
2277
2278 /* Set the interface address */
2279 lifr.lifr_addr = laddr;
2280 if (ioctl(s, SIOCSLIFADDR, (caddr_t)&lifr) < 0) {
2281 zerror(zlogp, B_TRUE,
2282 "%s: could not set IP address to %s",
2283 lifr.lifr_name, nwiftabptr->zone_nwif_address);
2284 goto bad;
2285 }
2286
2287 if (ioctl(s, SIOCGLIFFLAGS, (caddr_t)&lifr) < 0) {
2288 zerror(zlogp, B_TRUE, "%s: could not get flags",
2289 lifr.lifr_name);
2290 goto bad;
2291 }
2292 lifr.lifr_flags |= IFF_UP;
2293 if (ioctl(s, SIOCSLIFFLAGS, (caddr_t)&lifr) < 0) {
2294 int save_errno = errno;
2295 char *zone_using;
2296
2297 /*
2298 * If we failed with something other than EADDRNOTAVAIL,
2299 * then skip to the end. Otherwise, look up our address,
2300 * then call a function to determine which zone is already
2301 * using that address.
2302 */
2303 if (errno != EADDRNOTAVAIL) {
2304 zerror(zlogp, B_TRUE,
2305 "%s: could not bring network interface up",
2306 lifr.lifr_name);
2307 goto bad;
2308 }
2309 if (ioctl(s, SIOCGLIFADDR, (caddr_t)&lifr) < 0) {
2310 zerror(zlogp, B_TRUE, "%s: could not get address",
2311 lifr.lifr_name);
2312 goto bad;
2313 }
2314 zone_using = who_is_using(zlogp, &lifr);
2315 errno = save_errno;
2316 if (zone_using == NULL)
2317 zerror(zlogp, B_TRUE,
2318 "%s: could not bring network interface up",
2319 lifr.lifr_name);
2320 else
2321 zerror(zlogp, B_TRUE, "%s: could not bring network "
2322 "interface up: address in use by zone '%s'",
2323 lifr.lifr_name, zone_using);
2324 goto bad;
2325 }
2326
2327 if (!got_netmask && !is_loopback) {
2328 /*
2329 * A common, but often non-fatal problem, is that the system
2330 * cannot find the netmask for an interface address. This is
2331 * often caused by it being only in /etc/inet/netmasks, but
2332 * /etc/nsswitch.conf says to use NIS or NIS+ and it's not
2333 * in that. This doesn't show up at boot because the netmask
2334 * is obtained from /etc/inet/netmasks when no network
2335 * interfaces are up, but isn't consulted when NIS/NIS+ is
2336 * available. We warn the user here that something like this
2337 * has happened and we're just running with a default and
2338 * possible incorrect netmask.
2339 */
2340 char buffer[INET6_ADDRSTRLEN];
2341 void *addr;
2342 const char *nomatch = "no matching subnet found in netmasks(4)";
2343
2344 if (af == AF_INET)
2345 addr = &((struct sockaddr_in *)
2346 (&lifr.lifr_addr))->sin_addr;
2347 else
2348 addr = &((struct sockaddr_in6 *)
2349 (&lifr.lifr_addr))->sin6_addr;
2350
2351 /*
2352 * Find out what netmask the interface is going to be using.
2353 * If we just brought up an IPMP data address on an underlying
2354 * interface above, the address will have already migrated, so
2355 * the SIOCGLIFNETMASK won't be able to find it (but we need
2356 * to bring the address up to get the actual netmask). Just
2357 * omit printing the actual netmask in this corner-case.
2358 */
2359 if (ioctl(s, SIOCGLIFNETMASK, (caddr_t)&lifr) < 0 ||
2360 inet_ntop(af, addr, buffer, sizeof (buffer)) == NULL) {
2361 zerror(zlogp, B_FALSE, "WARNING: %s; using default.",
2362 nomatch);
2363 } else {
2364 zerror(zlogp, B_FALSE,
2365 "WARNING: %s: %s: %s; using default of %s.",
2366 lifr.lifr_name, nomatch, addrstr4, buffer);
2367 }
2368 }
2369
2370 /*
2371 * If a default router was specified for this interface
2372 * set the route now. Ignore if already set.
2373 */
2374 if (strlen(nwiftabptr->zone_nwif_defrouter) > 0) {
2375 int status;
2376 char *argv[7];
2377
2378 argv[0] = "route";
2379 argv[1] = "add";
2380 argv[2] = "-ifp";
2381 argv[3] = nwiftabptr->zone_nwif_physical;
2382 argv[4] = "default";
2383 argv[5] = nwiftabptr->zone_nwif_defrouter;
2384 argv[6] = NULL;
2385
2386 status = forkexec(zlogp, "/usr/sbin/route", argv);
2387 if (status != 0 && status != EEXIST)
2388 zerror(zlogp, B_FALSE, "Unable to set route for "
2389 "interface %s to %s\n",
2390 nwiftabptr->zone_nwif_physical,
2391 nwiftabptr->zone_nwif_defrouter);
2392 }
2393
2394 (void) close(s);
2395 return (Z_OK);
2396 bad:
2397 (void) ioctl(s, SIOCLIFREMOVEIF, (caddr_t)&lifr);
2398 (void) close(s);
2399 return (-1);
2400 }
2401
2402 /*
2403 * Sets up network interfaces based on information from the zone configuration.
2404 * IPv4 and IPv6 loopback interfaces are set up "for free", modeling the global
2405 * system.
2406 *
2407 * If anything goes wrong, we log a general error message, attempt to tear down
2408 * whatever we set up, and return an error.
2409 */
2410 static int
2411 configure_shared_network_interfaces(zlog_t *zlogp)
2412 {
2413 zone_dochandle_t handle;
2414 struct zone_nwiftab nwiftab, loopback_iftab;
2415 zoneid_t zoneid;
2416
2417 if ((zoneid = getzoneidbyname(zone_name)) == ZONE_ID_UNDEFINED) {
2418 zerror(zlogp, B_TRUE, "unable to get zoneid");
2419 return (-1);
2420 }
2421
2422 if ((handle = zonecfg_init_handle()) == NULL) {
2423 zerror(zlogp, B_TRUE, "getting zone configuration handle");
2424 return (-1);
2425 }
2426 if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK) {
2427 zerror(zlogp, B_FALSE, "invalid configuration");
2428 zonecfg_fini_handle(handle);
2429 return (-1);
2430 }
2431 if (zonecfg_setnwifent(handle) == Z_OK) {
2432 for (;;) {
2433 if (zonecfg_getnwifent(handle, &nwiftab) != Z_OK)
2434 break;
2435 if (configure_one_interface(zlogp, zoneid, &nwiftab) !=
2436 Z_OK) {
2437 (void) zonecfg_endnwifent(handle);
2438 zonecfg_fini_handle(handle);
2439 return (-1);
2440 }
2441 }
2442 (void) zonecfg_endnwifent(handle);
2443 }
2444 zonecfg_fini_handle(handle);
2445 if (is_system_labeled()) {
2446 /*
2447 * Labeled zones share the loopback interface
2448 * so it is not plumbed for shared stack instances.
2449 */
2450 return (0);
2451 }
2452 (void) strlcpy(loopback_iftab.zone_nwif_physical, "lo0",
2453 sizeof (loopback_iftab.zone_nwif_physical));
2454 (void) strlcpy(loopback_iftab.zone_nwif_address, "127.0.0.1",
2455 sizeof (loopback_iftab.zone_nwif_address));
2456 loopback_iftab.zone_nwif_defrouter[0] = '\0';
2457 if (configure_one_interface(zlogp, zoneid, &loopback_iftab) != Z_OK)
2458 return (-1);
2459
2460 /* Always plumb up the IPv6 loopback interface. */
2461 (void) strlcpy(loopback_iftab.zone_nwif_address, "::1/128",
2462 sizeof (loopback_iftab.zone_nwif_address));
2463 if (configure_one_interface(zlogp, zoneid, &loopback_iftab) != Z_OK)
2464 return (-1);
2465 return (0);
2466 }
2467
2468 static void
2469 zdlerror(zlog_t *zlogp, dladm_status_t err, const char *dlname, const char *str)
2470 {
2471 char errmsg[DLADM_STRSIZE];
2472
2473 (void) dladm_status2str(err, errmsg);
2474 zerror(zlogp, B_FALSE, "%s '%s': %s", str, dlname, errmsg);
2475 }
2476
2477 static int
2478 add_datalink(zlog_t *zlogp, char *zone_name, datalink_id_t linkid, char *dlname)
2479 {
2480 dladm_status_t err;
2481 boolean_t cpuset, poolset;
2482 char *poolp;
2483
2484 /* First check if it's in use by global zone. */
2485 if (zonecfg_ifname_exists(AF_INET, dlname) ||
2486 zonecfg_ifname_exists(AF_INET6, dlname)) {
2487 zerror(zlogp, B_FALSE, "WARNING: skipping network interface "
2488 "'%s' which is used in the global zone", dlname);
2489 return (-1);
2490 }
2491
2492 /* Set zoneid of this link. */
2493 err = dladm_set_linkprop(dld_handle, linkid, "zone", &zone_name, 1,
2494 DLADM_OPT_ACTIVE);
2495 if (err != DLADM_STATUS_OK) {
2496 zdlerror(zlogp, err, dlname,
2497 "WARNING: unable to add network interface");
2498 return (-1);
2499 }
2500
2501 /*
2502 * Set the pool of this link if the zone has a pool and
2503 * neither the cpus nor the pool datalink property is
2504 * already set.
2505 */
2506 err = dladm_linkprop_is_set(dld_handle, linkid, DLADM_PROP_VAL_CURRENT,
2507 "cpus", &cpuset);
2508 if (err != DLADM_STATUS_OK) {
2509 zdlerror(zlogp, err, dlname,
2510 "WARNING: unable to check if cpus link property is set");
2511 }
2512 err = dladm_linkprop_is_set(dld_handle, linkid, DLADM_PROP_VAL_CURRENT,
2513 "pool", &poolset);
2514 if (err != DLADM_STATUS_OK) {
2515 zdlerror(zlogp, err, dlname,
2516 "WARNING: unable to check if pool link property is set");
2517 }
2518
2519 if ((strlen(pool_name) != 0) && !cpuset && !poolset) {
2520 poolp = pool_name;
2521 err = dladm_set_linkprop(dld_handle, linkid, "pool",
2522 &poolp, 1, DLADM_OPT_ACTIVE);
2523 if (err != DLADM_STATUS_OK) {
2524 zerror(zlogp, B_FALSE, "WARNING: unable to set "
2525 "pool %s to datalink %s", pool_name, dlname);
2526 bzero(pool_name, sizeof (pool_name));
2527 }
2528 } else {
2529 bzero(pool_name, sizeof (pool_name));
2530 }
2531 return (0);
2532 }
2533
2534 static boolean_t
2535 sockaddr_to_str(sa_family_t af, const struct sockaddr *sockaddr,
2536 char *straddr, size_t len)
2537 {
2538 struct sockaddr_in *sin;
2539 struct sockaddr_in6 *sin6;
2540 const char *str = NULL;
2541
2542 if (af == AF_INET) {
2543 /* LINTED E_BAD_PTR_CAST_ALIGN */
2544 sin = SIN(sockaddr);
2545 str = inet_ntop(AF_INET, (void *)&sin->sin_addr, straddr, len);
2546 } else if (af == AF_INET6) {
2547 /* LINTED E_BAD_PTR_CAST_ALIGN */
2548 sin6 = SIN6(sockaddr);
2549 str = inet_ntop(AF_INET6, (void *)&sin6->sin6_addr, straddr,
2550 len);
2551 }
2552
2553 return (str != NULL);
2554 }
2555
2556 static int
2557 ipv4_prefixlen(struct sockaddr_in *sin)
2558 {
2559 struct sockaddr_in *m;
2560 struct sockaddr_storage mask;
2561
2562 m = SIN(&mask);
2563 m->sin_family = AF_INET;
2564 if (getnetmaskbyaddr(sin->sin_addr, &m->sin_addr) == 0) {
2565 return (mask2plen((struct sockaddr *)&mask));
2566 } else if (IN_CLASSA(htonl(sin->sin_addr.s_addr))) {
2567 return (8);
2568 } else if (IN_CLASSB(ntohl(sin->sin_addr.s_addr))) {
2569 return (16);
2570 } else if (IN_CLASSC(ntohl(sin->sin_addr.s_addr))) {
2571 return (24);
2572 }
2573 return (0);
2574 }
2575
2576 static int
2577 zone_setattr_network(int type, zoneid_t zoneid, datalink_id_t linkid,
2578 void *buf, size_t bufsize)
2579 {
2580 zone_net_data_t *zndata;
2581 size_t znsize;
2582 int err;
2583
2584 znsize = sizeof (*zndata) + bufsize;
2585 zndata = calloc(1, znsize);
2586 if (zndata == NULL)
2587 return (ENOMEM);
2588 zndata->zn_type = type;
2589 zndata->zn_len = bufsize;
2590 zndata->zn_linkid = linkid;
2591 bcopy(buf, zndata->zn_val, zndata->zn_len);
2592 err = zone_setattr(zoneid, ZONE_ATTR_NETWORK, zndata, znsize);
2593 free(zndata);
2594 return (err);
2595 }
2596
2597 static int
2598 add_net_for_linkid(zlog_t *zlogp, zoneid_t zoneid, zone_addr_list_t *start)
2599 {
2600 struct lifreq lifr;
2601 char **astr, *address;
2602 dladm_status_t dlstatus;
2603 char *ip_nospoof = "ip-nospoof";
2604 int nnet, naddr, err = 0, j;
2605 size_t zlen, cpleft;
2606 zone_addr_list_t *ptr, *end;
2607 char tmp[INET6_ADDRSTRLEN], *maskstr;
2608 char *zaddr, *cp;
2609 struct in6_addr *routes = NULL;
2610 boolean_t is_set;
2611 datalink_id_t linkid;
2612
2613 assert(start != NULL);
2614 naddr = 0; /* number of addresses */
2615 nnet = 0; /* number of net resources */
2616 linkid = start->za_linkid;
2617 for (ptr = start; ptr != NULL && ptr->za_linkid == linkid;
2618 ptr = ptr->za_next) {
2619 nnet++;
2620 }
2621 end = ptr;
2622 zlen = nnet * (INET6_ADDRSTRLEN + 1);
2623 astr = calloc(1, nnet * sizeof (uintptr_t));
2624 zaddr = calloc(1, zlen);
2625 if (astr == NULL || zaddr == NULL) {
2626 err = ENOMEM;
2627 goto done;
2628 }
2629 cp = zaddr;
2630 cpleft = zlen;
2631 j = 0;
2632 for (ptr = start; ptr != end; ptr = ptr->za_next) {
2633 address = ptr->za_nwiftab.zone_nwif_allowed_address;
2634 if (address[0] == '\0')
2635 continue;
2636 (void) snprintf(tmp, sizeof (tmp), "%s", address);
2637 /*
2638 * Validate the data. zonecfg_valid_net_address() clobbers
2639 * the /<mask> in the address string.
2640 */
2641 if (zonecfg_valid_net_address(address, &lifr) != Z_OK) {
2642 zerror(zlogp, B_FALSE, "invalid address [%s]\n",
2643 address);
2644 err = EINVAL;
2645 goto done;
2646 }
2647 /*
2648 * convert any hostnames to numeric address strings.
2649 */
2650 if (!sockaddr_to_str(lifr.lifr_addr.ss_family,
2651 (const struct sockaddr *)&lifr.lifr_addr, cp, cpleft)) {
2652 err = EINVAL;
2653 goto done;
2654 }
2655 /*
2656 * make a copy of the numeric string for the data needed
2657 * by the "allowed-ips" datalink property.
2658 */
2659 astr[j] = strdup(cp);
2660 if (astr[j] == NULL) {
2661 err = ENOMEM;
2662 goto done;
2663 }
2664 j++;
2665 /*
2666 * compute the default netmask from the address, if necessary
2667 */
2668 if ((maskstr = strchr(tmp, '/')) == NULL) {
2669 int prefixlen;
2670
2671 if (lifr.lifr_addr.ss_family == AF_INET) {
2672 prefixlen = ipv4_prefixlen(
2673 SIN(&lifr.lifr_addr));
2674 } else {
2675 struct sockaddr_in6 *sin6;
2676
2677 sin6 = SIN6(&lifr.lifr_addr);
2678 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2679 prefixlen = 10;
2680 else
2681 prefixlen = 64;
2682 }
2683 (void) snprintf(tmp, sizeof (tmp), "%d", prefixlen);
2684 maskstr = tmp;
2685 } else {
2686 maskstr++;
2687 }
2688 /* append the "/<netmask>" */
2689 (void) strlcat(cp, "/", cpleft);
2690 (void) strlcat(cp, maskstr, cpleft);
2691 (void) strlcat(cp, ",", cpleft);
2692 cp += strnlen(cp, zlen);
2693 cpleft = &zaddr[INET6_ADDRSTRLEN] - cp;
2694 }
2695 naddr = j; /* the actual number of addresses in the net resource */
2696 assert(naddr <= nnet);
2697
2698 /*
2699 * zonecfg has already verified that the defrouter property can only
2700 * be set if there is at least one address defined for the net resource.
2701 * If j is 0, there are no addresses defined, and therefore no routers
2702 * to configure, and we are done at that point.
2703 */
2704 if (j == 0)
2705 goto done;
2706
2707 /* over-write last ',' with '\0' */
2708 zaddr[strnlen(zaddr, zlen) + 1] = '\0';
2709
2710 /*
2711 * First make sure L3 protection is not already set on the link.
2712 */
2713 dlstatus = dladm_linkprop_is_set(dld_handle, linkid, DLADM_OPT_ACTIVE,
2714 "protection", &is_set);
2715 if (dlstatus != DLADM_STATUS_OK) {
2716 err = EINVAL;
2717 zerror(zlogp, B_FALSE, "unable to check if protection is set");
2718 goto done;
2719 }
2720 if (is_set) {
2721 err = EINVAL;
2722 zerror(zlogp, B_FALSE, "Protection is already set");
2723 goto done;
2724 }
2725 dlstatus = dladm_linkprop_is_set(dld_handle, linkid, DLADM_OPT_ACTIVE,
2726 "allowed-ips", &is_set);
2727 if (dlstatus != DLADM_STATUS_OK) {
2728 err = EINVAL;
2729 zerror(zlogp, B_FALSE, "unable to check if allowed-ips is set");
2730 goto done;
2731 }
2732 if (is_set) {
2733 zerror(zlogp, B_FALSE, "allowed-ips is already set");
2734 err = EINVAL;
2735 goto done;
2736 }
2737
2738 /*
2739 * Enable ip-nospoof for the link, and add address to the allowed-ips
2740 * list.
2741 */
2742 dlstatus = dladm_set_linkprop(dld_handle, linkid, "protection",
2743 &ip_nospoof, 1, DLADM_OPT_ACTIVE);
2744 if (dlstatus != DLADM_STATUS_OK) {
2745 zerror(zlogp, B_FALSE, "could not set protection\n");
2746 err = EINVAL;
2747 goto done;
2748 }
2749 dlstatus = dladm_set_linkprop(dld_handle, linkid, "allowed-ips",
2750 astr, naddr, DLADM_OPT_ACTIVE);
2751 if (dlstatus != DLADM_STATUS_OK) {
2752 zerror(zlogp, B_FALSE, "could not set allowed-ips\n");
2753 err = EINVAL;
2754 goto done;
2755 }
2756
2757 /* now set the address in the data-store */
2758 err = zone_setattr_network(ZONE_NETWORK_ADDRESS, zoneid, linkid,
2759 zaddr, strnlen(zaddr, zlen) + 1);
2760 if (err != 0)
2761 goto done;
2762
2763 /*
2764 * add the defaultrouters
2765 */
2766 routes = calloc(1, nnet * sizeof (*routes));
2767 j = 0;
2768 for (ptr = start; ptr != end; ptr = ptr->za_next) {
2769 address = ptr->za_nwiftab.zone_nwif_defrouter;
2770 if (address[0] == '\0')
2771 continue;
2772 if (strchr(address, '/') == NULL && strchr(address, ':') != 0) {
2773 /*
2774 * zonecfg_valid_net_address() expects numeric IPv6
2775 * addresses to have a CIDR format netmask.
2776 */
2777 (void) snprintf(tmp, sizeof (tmp), "/%d", V6_ADDR_LEN);
2778 (void) strlcat(address, tmp, INET6_ADDRSTRLEN);
2779 }
2780 if (zonecfg_valid_net_address(address, &lifr) != Z_OK) {
2781 zerror(zlogp, B_FALSE,
2782 "invalid router [%s]\n", address);
2783 err = EINVAL;
2784 goto done;
2785 }
2786 if (lifr.lifr_addr.ss_family == AF_INET6) {
2787 routes[j] = SIN6(&lifr.lifr_addr)->sin6_addr;
2788 } else {
2789 IN6_INADDR_TO_V4MAPPED(&SIN(&lifr.lifr_addr)->sin_addr,
2790 &routes[j]);
2791 }
2792 j++;
2793 }
2794 assert(j <= nnet);
2795 if (j > 0) {
2796 err = zone_setattr_network(ZONE_NETWORK_DEFROUTER, zoneid,
2797 linkid, routes, j * sizeof (*routes));
2798 }
2799 done:
2800 free(routes);
2801 for (j = 0; j < naddr; j++)
2802 free(astr[j]);
2803 free(astr);
2804 free(zaddr);
2805 return (err);
2806
2807 }
2808
2809 static int
2810 add_net(zlog_t *zlogp, zoneid_t zoneid, zone_addr_list_t *zalist)
2811 {
2812 zone_addr_list_t *ptr;
2813 datalink_id_t linkid;
2814 int err;
2815
2816 if (zalist == NULL)
2817 return (0);
2818
2819 linkid = zalist->za_linkid;
2820
2821 err = add_net_for_linkid(zlogp, zoneid, zalist);
2822 if (err != 0)
2823 return (err);
2824
2825 for (ptr = zalist; ptr != NULL; ptr = ptr->za_next) {
2826 if (ptr->za_linkid == linkid)
2827 continue;
2828 linkid = ptr->za_linkid;
2829 err = add_net_for_linkid(zlogp, zoneid, ptr);
2830 if (err != 0)
2831 return (err);
2832 }
2833 return (0);
2834 }
2835
2836 /*
2837 * Add "new" to the list of network interfaces to be configured by
2838 * add_net on zone boot in "old". The list of interfaces in "old" is
2839 * sorted by datalink_id_t, with interfaces sorted FIFO for a given
2840 * datalink_id_t.
2841 *
2842 * Returns the merged list of IP interfaces containing "old" and "new"
2843 */
2844 static zone_addr_list_t *
2845 add_ip_interface(zone_addr_list_t *old, zone_addr_list_t *new)
2846 {
2847 zone_addr_list_t *ptr, *next;
2848 datalink_id_t linkid = new->za_linkid;
2849
2850 assert(old != new);
2851
2852 if (old == NULL)
2853 return (new);
2854 for (ptr = old; ptr != NULL; ptr = ptr->za_next) {
2855 if (ptr->za_linkid == linkid)
2856 break;
2857 }
2858 if (ptr == NULL) {
2859 /* linkid does not already exist, add to the beginning */
2860 new->za_next = old;
2861 return (new);
2862 }
2863 /*
2864 * adding to the middle of the list; ptr points at the first
2865 * occurrence of linkid. Find the last occurrence.
2866 */
2867 while ((next = ptr->za_next) != NULL) {
2868 if (next->za_linkid != linkid)
2869 break;
2870 ptr = next;
2871 }
2872 /* insert new after ptr */
2873 new->za_next = next;
2874 ptr->za_next = new;
2875 return (old);
2876 }
2877
2878 void
2879 free_ip_interface(zone_addr_list_t *zalist)
2880 {
2881 zone_addr_list_t *ptr, *new;
2882
2883 for (ptr = zalist; ptr != NULL; ) {
2884 new = ptr;
2885 ptr = ptr->za_next;
2886 free(new);
2887 }
2888 }
2889
2890 /*
2891 * Add the kernel access control information for the interface names.
2892 * If anything goes wrong, we log a general error message, attempt to tear down
2893 * whatever we set up, and return an error.
2894 */
2895 static int
2896 configure_exclusive_network_interfaces(zlog_t *zlogp, zoneid_t zoneid)
2897 {
2898 zone_dochandle_t handle;
2899 struct zone_nwiftab nwiftab;
2900 char rootpath[MAXPATHLEN];
2901 char path[MAXPATHLEN];
2902 datalink_id_t linkid;
2903 di_prof_t prof = NULL;
2904 boolean_t added = B_FALSE;
2905 zone_addr_list_t *zalist = NULL, *new;
2906
2907 if ((handle = zonecfg_init_handle()) == NULL) {
2908 zerror(zlogp, B_TRUE, "getting zone configuration handle");
2909 return (-1);
2910 }
2911 if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK) {
2912 zerror(zlogp, B_FALSE, "invalid configuration");
2913 zonecfg_fini_handle(handle);
2914 return (-1);
2915 }
2916
2917 if (zonecfg_setnwifent(handle) != Z_OK) {
2918 zonecfg_fini_handle(handle);
2919 return (0);
2920 }
2921
2922 for (;;) {
2923 if (zonecfg_getnwifent(handle, &nwiftab) != Z_OK)
2924 break;
2925
2926 if (prof == NULL) {
2927 if (zone_get_devroot(zone_name, rootpath,
2928 sizeof (rootpath)) != Z_OK) {
2929 (void) zonecfg_endnwifent(handle);
2930 zonecfg_fini_handle(handle);
2931 zerror(zlogp, B_TRUE,
2932 "unable to determine dev root");
2933 return (-1);
2934 }
2935 (void) snprintf(path, sizeof (path), "%s%s", rootpath,
2936 "/dev");
2937 if (di_prof_init(path, &prof) != 0) {
2938 (void) zonecfg_endnwifent(handle);
2939 zonecfg_fini_handle(handle);
2940 zerror(zlogp, B_TRUE,
2941 "failed to initialize profile");
2942 return (-1);
2943 }
2944 }
2945
2946 /*
2947 * Create the /dev entry for backward compatibility.
2948 * Only create the /dev entry if it's not in use.
2949 * Note that the zone still boots when the assigned
2950 * interface is inaccessible, used by others, etc.
2951 * Also, when vanity naming is used, some interface do
2952 * do not have corresponding /dev node names (for example,
2953 * vanity named aggregations). The /dev entry is not
2954 * created in that case. The /dev/net entry is always
2955 * accessible.
2956 */
2957 if (dladm_name2info(dld_handle, nwiftab.zone_nwif_physical,
2958 &linkid, NULL, NULL, NULL) == DLADM_STATUS_OK &&
2959 add_datalink(zlogp, zone_name, linkid,
2960 nwiftab.zone_nwif_physical) == 0) {
2961 added = B_TRUE;
2962 } else {
2963 (void) zonecfg_endnwifent(handle);
2964 zonecfg_fini_handle(handle);
2965 zerror(zlogp, B_TRUE, "failed to add network device");
2966 return (-1);
2967 }
2968 /* set up the new IP interface, and add them all later */
2969 new = malloc(sizeof (*new));
2970 if (new == NULL) {
2971 zerror(zlogp, B_TRUE, "no memory for %s",
2972 nwiftab.zone_nwif_physical);
2973 zonecfg_fini_handle(handle);
2974 free_ip_interface(zalist);
2975 }
2976 bzero(new, sizeof (*new));
2977 new->za_nwiftab = nwiftab;
2978 new->za_linkid = linkid;
2979 zalist = add_ip_interface(zalist, new);
2980 }
2981 if (zalist != NULL) {
2982 if ((errno = add_net(zlogp, zoneid, zalist)) != 0) {
2983 (void) zonecfg_endnwifent(handle);
2984 zonecfg_fini_handle(handle);
2985 zerror(zlogp, B_TRUE, "failed to add address");
2986 free_ip_interface(zalist);
2987 return (-1);
2988 }
2989 free_ip_interface(zalist);
2990 }
2991 (void) zonecfg_endnwifent(handle);
2992 zonecfg_fini_handle(handle);
2993
2994 if (prof != NULL && added) {
2995 if (di_prof_commit(prof) != 0) {
2996 zerror(zlogp, B_TRUE, "failed to commit profile");
2997 return (-1);
2998 }
2999 }
3000 if (prof != NULL)
3001 di_prof_fini(prof);
3002
3003 return (0);
3004 }
3005
3006 static int
3007 remove_datalink_pool(zlog_t *zlogp, zoneid_t zoneid)
3008 {
3009 ushort_t flags;
3010 zone_iptype_t iptype;
3011 int i, dlnum = 0;
3012 datalink_id_t *dllink, *dllinks = NULL;
3013 dladm_status_t err;
3014
3015 if (strlen(pool_name) == 0)
3016 return (0);
3017
3018 if (zone_getattr(zoneid, ZONE_ATTR_FLAGS, &flags,
3019 sizeof (flags)) < 0) {
3020 if (vplat_get_iptype(zlogp, &iptype) < 0) {
3021 zerror(zlogp, B_FALSE, "unable to determine ip-type");
3022 return (-1);
3023 }
3024 } else {
3025 if (flags & ZF_NET_EXCL)
3026 iptype = ZS_EXCLUSIVE;
3027 else
3028 iptype = ZS_SHARED;
3029 }
3030
3031 if (iptype == ZS_EXCLUSIVE) {
3032 /*
3033 * Get the datalink count and for each datalink,
3034 * attempt to clear the pool property and clear
3035 * the pool_name.
3036 */
3037 if (zone_list_datalink(zoneid, &dlnum, NULL) != 0) {
3038 zerror(zlogp, B_TRUE, "unable to count network "
3039 "interfaces");
3040 return (-1);
3041 }
3042
3043 if (dlnum == 0)
3044 return (0);
3045
3046 if ((dllinks = malloc(dlnum * sizeof (datalink_id_t)))
3047 == NULL) {
3048 zerror(zlogp, B_TRUE, "memory allocation failed");
3049 return (-1);
3050 }
3051 if (zone_list_datalink(zoneid, &dlnum, dllinks) != 0) {
3052 zerror(zlogp, B_TRUE, "unable to list network "
3053 "interfaces");
3054 return (-1);
3055 }
3056
3057 bzero(pool_name, sizeof (pool_name));
3058 for (i = 0, dllink = dllinks; i < dlnum; i++, dllink++) {
3059 err = dladm_set_linkprop(dld_handle, *dllink, "pool",
3060 NULL, 0, DLADM_OPT_ACTIVE);
3061 if (err != DLADM_STATUS_OK) {
3062 zerror(zlogp, B_TRUE,
3063 "WARNING: unable to clear pool");
3064 }
3065 }
3066 free(dllinks);
3067 }
3068 return (0);
3069 }
3070
3071 static int
3072 remove_datalink_protect(zlog_t *zlogp, zoneid_t zoneid)
3073 {
3074 ushort_t flags;
3075 zone_iptype_t iptype;
3076 int i, dlnum = 0;
3077 dladm_status_t dlstatus;
3078 datalink_id_t *dllink, *dllinks = NULL;
3079
3080 if (zone_getattr(zoneid, ZONE_ATTR_FLAGS, &flags,
3081 sizeof (flags)) < 0) {
3082 if (vplat_get_iptype(zlogp, &iptype) < 0) {
3083 zerror(zlogp, B_FALSE, "unable to determine ip-type");
3084 return (-1);
3085 }
3086 } else {
3087 if (flags & ZF_NET_EXCL)
3088 iptype = ZS_EXCLUSIVE;
3089 else
3090 iptype = ZS_SHARED;
3091 }
3092
3093 if (iptype != ZS_EXCLUSIVE)
3094 return (0);
3095
3096 /*
3097 * Get the datalink count and for each datalink,
3098 * attempt to clear the pool property and clear
3099 * the pool_name.
3100 */
3101 if (zone_list_datalink(zoneid, &dlnum, NULL) != 0) {
3102 zerror(zlogp, B_TRUE, "unable to count network interfaces");
3103 return (-1);
3104 }
3105
3106 if (dlnum == 0)
3107 return (0);
3108
3109 if ((dllinks = malloc(dlnum * sizeof (datalink_id_t))) == NULL) {
3110 zerror(zlogp, B_TRUE, "memory allocation failed");
3111 return (-1);
3112 }
3113 if (zone_list_datalink(zoneid, &dlnum, dllinks) != 0) {
3114 zerror(zlogp, B_TRUE, "unable to list network interfaces");
3115 free(dllinks);
3116 return (-1);
3117 }
3118
3119 for (i = 0, dllink = dllinks; i < dlnum; i++, dllink++) {
3120 char dlerr[DLADM_STRSIZE];
3121
3122 dlstatus = dladm_set_linkprop(dld_handle, *dllink,
3123 "protection", NULL, 0, DLADM_OPT_ACTIVE);
3124 if (dlstatus == DLADM_STATUS_NOTFOUND) {
3125 /* datalink does not belong to the GZ */
3126 continue;
3127 }
3128 if (dlstatus != DLADM_STATUS_OK) {
3129 zerror(zlogp, B_FALSE,
3130 dladm_status2str(dlstatus, dlerr));
3131 free(dllinks);
3132 return (-1);
3133 }
3134 dlstatus = dladm_set_linkprop(dld_handle, *dllink,
3135 "allowed-ips", NULL, 0, DLADM_OPT_ACTIVE);
3136 if (dlstatus != DLADM_STATUS_OK) {
3137 zerror(zlogp, B_FALSE,
3138 dladm_status2str(dlstatus, dlerr));
3139 free(dllinks);
3140 return (-1);
3141 }
3142 }
3143 free(dllinks);
3144 return (0);
3145 }
3146
3147 static int
3148 unconfigure_exclusive_network_interfaces(zlog_t *zlogp, zoneid_t zoneid)
3149 {
3150 int dlnum = 0;
3151
3152 /*
3153 * The kernel shutdown callback for the dls module should have removed
3154 * all datalinks from this zone. If any remain, then there's a
3155 * problem.
3156 */
3157 if (zone_list_datalink(zoneid, &dlnum, NULL) != 0) {
3158 zerror(zlogp, B_TRUE, "unable to list network interfaces");
3159 return (-1);
3160 }
3161 if (dlnum != 0) {
3162 zerror(zlogp, B_FALSE,
3163 "datalinks remain in zone after shutdown");
3164 return (-1);
3165 }
3166 return (0);
3167 }
3168
3169 static int
3170 tcp_abort_conn(zlog_t *zlogp, zoneid_t zoneid,
3171 const struct sockaddr_storage *local, const struct sockaddr_storage *remote)
3172 {
3173 int fd;
3174 struct strioctl ioc;
3175 tcp_ioc_abort_conn_t conn;
3176 int error;
3177
3178 conn.ac_local = *local;
3179 conn.ac_remote = *remote;
3180 conn.ac_start = TCPS_SYN_SENT;
3181 conn.ac_end = TCPS_TIME_WAIT;
3182 conn.ac_zoneid = zoneid;
3183
3184 ioc.ic_cmd = TCP_IOC_ABORT_CONN;
3185 ioc.ic_timout = -1; /* infinite timeout */
3186 ioc.ic_len = sizeof (conn);
3187 ioc.ic_dp = (char *)&conn;
3188
3189 if ((fd = open("/dev/tcp", O_RDONLY)) < 0) {
3190 zerror(zlogp, B_TRUE, "unable to open %s", "/dev/tcp");
3191 return (-1);
3192 }
3193
3194 error = ioctl(fd, I_STR, &ioc);
3195 (void) close(fd);
3196 if (error == 0 || errno == ENOENT) /* ENOENT is not an error */
3197 return (0);
3198 return (-1);
3199 }
3200
3201 static int
3202 tcp_abort_connections(zlog_t *zlogp, zoneid_t zoneid)
3203 {
3204 struct sockaddr_storage l, r;
3205 struct sockaddr_in *local, *remote;
3206 struct sockaddr_in6 *local6, *remote6;
3207 int error;
3208
3209 /*
3210 * Abort IPv4 connections.
3211 */
3212 bzero(&l, sizeof (*local));
3213 local = (struct sockaddr_in *)&l;
3214 local->sin_family = AF_INET;
3215 local->sin_addr.s_addr = INADDR_ANY;
3216 local->sin_port = 0;
3217
3218 bzero(&r, sizeof (*remote));
3219 remote = (struct sockaddr_in *)&r;
3220 remote->sin_family = AF_INET;
3221 remote->sin_addr.s_addr = INADDR_ANY;
3222 remote->sin_port = 0;
3223
3224 if ((error = tcp_abort_conn(zlogp, zoneid, &l, &r)) != 0)
3225 return (error);
3226
3227 /*
3228 * Abort IPv6 connections.
3229 */
3230 bzero(&l, sizeof (*local6));
3231 local6 = (struct sockaddr_in6 *)&l;
3232 local6->sin6_family = AF_INET6;
3233 local6->sin6_port = 0;
3234 local6->sin6_addr = in6addr_any;
3235
3236 bzero(&r, sizeof (*remote6));
3237 remote6 = (struct sockaddr_in6 *)&r;
3238 remote6->sin6_family = AF_INET6;
3239 remote6->sin6_port = 0;
3240 remote6->sin6_addr = in6addr_any;
3241
3242 if ((error = tcp_abort_conn(zlogp, zoneid, &l, &r)) != 0)
3243 return (error);
3244 return (0);
3245 }
3246
3247 static int
3248 get_privset(zlog_t *zlogp, priv_set_t *privs, zone_mnt_t mount_cmd)
3249 {
3250 int error = -1;
3251 zone_dochandle_t handle;
3252 char *privname = NULL;
3253
3254 if ((handle = zonecfg_init_handle()) == NULL) {
3255 zerror(zlogp, B_TRUE, "getting zone configuration handle");
3256 return (-1);
3257 }
3258 if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK) {
3259 zerror(zlogp, B_FALSE, "invalid configuration");
3260 zonecfg_fini_handle(handle);
3261 return (-1);
3262 }
3263
3264 if (ALT_MOUNT(mount_cmd)) {
3265 zone_iptype_t iptype;
3266 const char *curr_iptype;
3267
3268 if (zonecfg_get_iptype(handle, &iptype) != Z_OK) {
3269 zerror(zlogp, B_TRUE, "unable to determine ip-type");
3270 zonecfg_fini_handle(handle);
3271 return (-1);
3272 }
3273
3274 switch (iptype) {
3275 case ZS_SHARED:
3276 curr_iptype = "shared";
3277 break;
3278 case ZS_EXCLUSIVE:
3279 curr_iptype = "exclusive";
3280 break;
3281 }
3282
3283 if (zonecfg_default_privset(privs, curr_iptype) == Z_OK) {
3284 zonecfg_fini_handle(handle);
3285 return (0);
3286 }
3287 zerror(zlogp, B_FALSE,
3288 "failed to determine the zone's default privilege set");
3289 zonecfg_fini_handle(handle);
3290 return (-1);
3291 }
3292
3293 switch (zonecfg_get_privset(handle, privs, &privname)) {
3294 case Z_OK:
3295 error = 0;
3296 break;
3297 case Z_PRIV_PROHIBITED:
3298 zerror(zlogp, B_FALSE, "privilege \"%s\" is not permitted "
3299 "within the zone's privilege set", privname);
3300 break;
3301 case Z_PRIV_REQUIRED:
3302 zerror(zlogp, B_FALSE, "required privilege \"%s\" is missing "
3303 "from the zone's privilege set", privname);
3304 break;
3305 case Z_PRIV_UNKNOWN:
3306 zerror(zlogp, B_FALSE, "unknown privilege \"%s\" specified "
3307 "in the zone's privilege set", privname);
3308 break;
3309 default:
3310 zerror(zlogp, B_FALSE, "failed to determine the zone's "
3311 "privilege set");
3312 break;
3313 }
3314
3315 free(privname);
3316 zonecfg_fini_handle(handle);
3317 return (error);
3318 }
3319
3320 static int
3321 get_rctls(zlog_t *zlogp, char **bufp, size_t *bufsizep)
3322 {
3323 nvlist_t *nvl = NULL;
3324 char *nvl_packed = NULL;
3325 size_t nvl_size = 0;
3326 nvlist_t **nvlv = NULL;
3327 int rctlcount = 0;
3328 int error = -1;
3329 zone_dochandle_t handle;
3330 struct zone_rctltab rctltab;
3331 rctlblk_t *rctlblk = NULL;
3332 uint64_t maxlwps;
3333 uint64_t maxprocs;
3334
3335 *bufp = NULL;
3336 *bufsizep = 0;
3337
3338 if ((handle = zonecfg_init_handle()) == NULL) {
3339 zerror(zlogp, B_TRUE, "getting zone configuration handle");
3340 return (-1);
3341 }
3342 if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK) {
3343 zerror(zlogp, B_FALSE, "invalid configuration");
3344 zonecfg_fini_handle(handle);
3345 return (-1);
3346 }
3347
3348 rctltab.zone_rctl_valptr = NULL;
3349 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
3350 zerror(zlogp, B_TRUE, "%s failed", "nvlist_alloc");
3351 goto out;
3352 }
3353
3354 /*
3355 * Allow the administrator to control both the maximum number of
3356 * process table slots and the maximum number of lwps with just the
3357 * max-processes property. If only the max-processes property is set,
3358 * we add a max-lwps property with a limit derived from max-processes.
3359 */
3360 if (zonecfg_get_aliased_rctl(handle, ALIAS_MAXPROCS, &maxprocs)
3361 == Z_OK &&
3362 zonecfg_get_aliased_rctl(handle, ALIAS_MAXLWPS, &maxlwps)
3363 == Z_NO_ENTRY) {
3364 if (zonecfg_set_aliased_rctl(handle, ALIAS_MAXLWPS,
3365 maxprocs * LWPS_PER_PROCESS) != Z_OK) {
3366 zerror(zlogp, B_FALSE, "unable to set max-lwps alias");
3367 goto out;
3368 }
3369 }
3370
3371 if (zonecfg_setrctlent(handle) != Z_OK) {
3372 zerror(zlogp, B_FALSE, "%s failed", "zonecfg_setrctlent");
3373 goto out;
3374 }
3375
3376 if ((rctlblk = malloc(rctlblk_size())) == NULL) {
3377 zerror(zlogp, B_TRUE, "memory allocation failed");
3378 goto out;
3379 }
3380 while (zonecfg_getrctlent(handle, &rctltab) == Z_OK) {
3381 struct zone_rctlvaltab *rctlval;
3382 uint_t i, count;
3383 const char *name = rctltab.zone_rctl_name;
3384
3385 /* zoneadm should have already warned about unknown rctls. */
3386 if (!zonecfg_is_rctl(name)) {
3387 zonecfg_free_rctl_value_list(rctltab.zone_rctl_valptr);
3388 rctltab.zone_rctl_valptr = NULL;
3389 continue;
3390 }
3391 count = 0;
3392 for (rctlval = rctltab.zone_rctl_valptr; rctlval != NULL;
3393 rctlval = rctlval->zone_rctlval_next) {
3394 count++;
3395 }
3396 if (count == 0) { /* ignore */
3397 continue; /* Nothing to free */
3398 }
3399 if ((nvlv = malloc(sizeof (*nvlv) * count)) == NULL)
3400 goto out;
3401 i = 0;
3402 for (rctlval = rctltab.zone_rctl_valptr; rctlval != NULL;
3403 rctlval = rctlval->zone_rctlval_next, i++) {
3404 if (nvlist_alloc(&nvlv[i], NV_UNIQUE_NAME, 0) != 0) {
3405 zerror(zlogp, B_TRUE, "%s failed",
3406 "nvlist_alloc");
3407 goto out;
3408 }
3409 if (zonecfg_construct_rctlblk(rctlval, rctlblk)
3410 != Z_OK) {
3411 zerror(zlogp, B_FALSE, "invalid rctl value: "
3412 "(priv=%s,limit=%s,action=%s)",
3413 rctlval->zone_rctlval_priv,
3414 rctlval->zone_rctlval_limit,
3415 rctlval->zone_rctlval_action);
3416 goto out;
3417 }
3418 if (!zonecfg_valid_rctl(name, rctlblk)) {
3419 zerror(zlogp, B_FALSE,
3420 "(priv=%s,limit=%s,action=%s) is not a "
3421 "valid value for rctl '%s'",
3422 rctlval->zone_rctlval_priv,
3423 rctlval->zone_rctlval_limit,
3424 rctlval->zone_rctlval_action,
3425 name);
3426 goto out;
3427 }
3428 if (nvlist_add_uint64(nvlv[i], "privilege",
3429 rctlblk_get_privilege(rctlblk)) != 0) {
3430 zerror(zlogp, B_FALSE, "%s failed",
3431 "nvlist_add_uint64");
3432 goto out;
3433 }
3434 if (nvlist_add_uint64(nvlv[i], "limit",
3435 rctlblk_get_value(rctlblk)) != 0) {
3436 zerror(zlogp, B_FALSE, "%s failed",
3437 "nvlist_add_uint64");
3438 goto out;
3439 }
3440 if (nvlist_add_uint64(nvlv[i], "action",
3441 (uint_t)rctlblk_get_local_action(rctlblk, NULL))
3442 != 0) {
3443 zerror(zlogp, B_FALSE, "%s failed",
3444 "nvlist_add_uint64");
3445 goto out;
3446 }
3447 }
3448 zonecfg_free_rctl_value_list(rctltab.zone_rctl_valptr);
3449 rctltab.zone_rctl_valptr = NULL;
3450 if (nvlist_add_nvlist_array(nvl, (char *)name, nvlv, count)
3451 != 0) {
3452 zerror(zlogp, B_FALSE, "%s failed",
3453 "nvlist_add_nvlist_array");
3454 goto out;
3455 }
3456 for (i = 0; i < count; i++)
3457 nvlist_free(nvlv[i]);
3458 free(nvlv);
3459 nvlv = NULL;
3460 rctlcount++;
3461 }
3462 (void) zonecfg_endrctlent(handle);
3463
3464 if (rctlcount == 0) {
3465 error = 0;
3466 goto out;
3467 }
3468 if (nvlist_pack(nvl, &nvl_packed, &nvl_size, NV_ENCODE_NATIVE, 0)
3469 != 0) {
3470 zerror(zlogp, B_FALSE, "%s failed", "nvlist_pack");
3471 goto out;
3472 }
3473
3474 error = 0;
3475 *bufp = nvl_packed;
3476 *bufsizep = nvl_size;
3477
3478 out:
3479 free(rctlblk);
3480 zonecfg_free_rctl_value_list(rctltab.zone_rctl_valptr);
3481 if (error && nvl_packed != NULL)
3482 free(nvl_packed);
3483 if (nvl != NULL)
3484 nvlist_free(nvl);
3485 if (nvlv != NULL)
3486 free(nvlv);
3487 if (handle != NULL)
3488 zonecfg_fini_handle(handle);
3489 return (error);
3490 }
3491
3492 static int
3493 get_implicit_datasets(zlog_t *zlogp, char **retstr)
3494 {
3495 char cmdbuf[2 * MAXPATHLEN];
3496
3497 if (query_hook[0] == '\0')
3498 return (0);
3499
3500 if (snprintf(cmdbuf, sizeof (cmdbuf), "%s datasets", query_hook)
3501 > sizeof (cmdbuf))
3502 return (-1);
3503
3504 if (do_subproc(zlogp, cmdbuf, retstr) != 0)
3505 return (-1);
3506
3507 return (0);
3508 }
3509
3510 static int
3511 get_datasets(zlog_t *zlogp, char **bufp, size_t *bufsizep)
3512 {
3513 zone_dochandle_t handle;
3514 struct zone_dstab dstab;
3515 size_t total, offset, len;
3516 int error = -1;
3517 char *str = NULL;
3518 char *implicit_datasets = NULL;
3519 int implicit_len = 0;
3520
3521 *bufp = NULL;
3522 *bufsizep = 0;
3523
3524 if ((handle = zonecfg_init_handle()) == NULL) {
3525 zerror(zlogp, B_TRUE, "getting zone configuration handle");
3526 return (-1);
3527 }
3528 if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK) {
3529 zerror(zlogp, B_FALSE, "invalid configuration");
3530 zonecfg_fini_handle(handle);
3531 return (-1);
3532 }
3533
3534 if (get_implicit_datasets(zlogp, &implicit_datasets) != 0) {
3535 zerror(zlogp, B_FALSE, "getting implicit datasets failed");
3536 goto out;
3537 }
3538
3539 if (zonecfg_setdsent(handle) != Z_OK) {
3540 zerror(zlogp, B_FALSE, "%s failed", "zonecfg_setdsent");
3541 goto out;
3542 }
3543
3544 total = 0;
3545 while (zonecfg_getdsent(handle, &dstab) == Z_OK)
3546 total += strlen(dstab.zone_dataset_name) + 1;
3547 (void) zonecfg_enddsent(handle);
3548
3549 if (implicit_datasets != NULL)
3550 implicit_len = strlen(implicit_datasets);
3551 if (implicit_len > 0)
3552 total += implicit_len + 1;
3553
3554 if (total == 0) {
3555 error = 0;
3556 goto out;
3557 }
3558
3559 if ((str = malloc(total)) == NULL) {
3560 zerror(zlogp, B_TRUE, "memory allocation failed");
3561 goto out;
3562 }
3563
3564 if (zonecfg_setdsent(handle) != Z_OK) {
3565 zerror(zlogp, B_FALSE, "%s failed", "zonecfg_setdsent");
3566 goto out;
3567 }
3568 offset = 0;
3569 while (zonecfg_getdsent(handle, &dstab) == Z_OK) {
3570 len = strlen(dstab.zone_dataset_name);
3571 (void) strlcpy(str + offset, dstab.zone_dataset_name,
3572 total - offset);
3573 offset += len;
3574 if (offset < total - 1)
3575 str[offset++] = ',';
3576 }
3577 (void) zonecfg_enddsent(handle);
3578
3579 if (implicit_len > 0)
3580 (void) strlcpy(str + offset, implicit_datasets, total - offset);
3581
3582 error = 0;
3583 *bufp = str;
3584 *bufsizep = total;
3585
3586 out:
3587 if (error != 0 && str != NULL)
3588 free(str);
3589 if (handle != NULL)
3590 zonecfg_fini_handle(handle);
3591 if (implicit_datasets != NULL)
3592 free(implicit_datasets);
3593
3594 return (error);
3595 }
3596
3597 static int
3598 validate_datasets(zlog_t *zlogp)
3599 {
3600 zone_dochandle_t handle;
3601 struct zone_dstab dstab;
3602 zfs_handle_t *zhp;
3603 libzfs_handle_t *hdl;
3604
3605 if ((handle = zonecfg_init_handle()) == NULL) {
3606 zerror(zlogp, B_TRUE, "getting zone configuration handle");
3607 return (-1);
3608 }
3609 if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK) {
3610 zerror(zlogp, B_FALSE, "invalid configuration");
3611 zonecfg_fini_handle(handle);
3612 return (-1);
3613 }
3614
3615 if (zonecfg_setdsent(handle) != Z_OK) {
3616 zerror(zlogp, B_FALSE, "invalid configuration");
3617 zonecfg_fini_handle(handle);
3618 return (-1);
3619 }
3620
3621 if ((hdl = libzfs_init()) == NULL) {
3622 zerror(zlogp, B_FALSE, "opening ZFS library");
3623 zonecfg_fini_handle(handle);
3624 return (-1);
3625 }
3626
3627 while (zonecfg_getdsent(handle, &dstab) == Z_OK) {
3628
3629 if ((zhp = zfs_open(hdl, dstab.zone_dataset_name,
3630 ZFS_TYPE_FILESYSTEM)) == NULL) {
3631 zerror(zlogp, B_FALSE, "cannot open ZFS dataset '%s'",
3632 dstab.zone_dataset_name);
3633 zonecfg_fini_handle(handle);
3634 libzfs_fini(hdl);
3635 return (-1);
3636 }
3637
3638 /*
3639 * Automatically set the 'zoned' property. We check the value
3640 * first because we'll get EPERM if it is already set.
3641 */
3642 if (!zfs_prop_get_int(zhp, ZFS_PROP_ZONED) &&
3643 zfs_prop_set(zhp, zfs_prop_to_name(ZFS_PROP_ZONED),
3644 "on") != 0) {
3645 zerror(zlogp, B_FALSE, "cannot set 'zoned' "
3646 "property for ZFS dataset '%s'\n",
3647 dstab.zone_dataset_name);
3648 zonecfg_fini_handle(handle);
3649 zfs_close(zhp);
3650 libzfs_fini(hdl);
3651 return (-1);
3652 }
3653
3654 zfs_close(zhp);
3655 }
3656 (void) zonecfg_enddsent(handle);
3657
3658 zonecfg_fini_handle(handle);
3659 libzfs_fini(hdl);
3660
3661 return (0);
3662 }
3663
3664 /*
3665 * Return true if the path is its own zfs file system. We determine this
3666 * by stat-ing the path to see if it is zfs and stat-ing the parent to see
3667 * if it is a different fs.
3668 */
3669 boolean_t
3670 is_zonepath_zfs(char *zonepath)
3671 {
3672 int res;
3673 char *path;
3674 char *parent;
3675 struct statvfs64 buf1, buf2;
3676
3677 if (statvfs64(zonepath, &buf1) != 0)
3678 return (B_FALSE);
3679
3680 if (strcmp(buf1.f_basetype, "zfs") != 0)
3681 return (B_FALSE);
3682
3683 if ((path = strdup(zonepath)) == NULL)
3684 return (B_FALSE);
3685
3686 parent = dirname(path);
3687 res = statvfs64(parent, &buf2);
3688 free(path);
3689
3690 if (res != 0)
3691 return (B_FALSE);
3692
3693 if (buf1.f_fsid == buf2.f_fsid)
3694 return (B_FALSE);
3695
3696 return (B_TRUE);
3697 }
3698
3699 /*
3700 * Verify the MAC label in the root dataset for the zone.
3701 * If the label exists, it must match the label configured for the zone.
3702 * Otherwise if there's no label on the dataset, create one here.
3703 */
3704
3705 static int
3706 validate_rootds_label(zlog_t *zlogp, char *rootpath, m_label_t *zone_sl)
3707 {
3708 int error = -1;
3709 zfs_handle_t *zhp;
3710 libzfs_handle_t *hdl;
3711 m_label_t ds_sl;
3712 char zonepath[MAXPATHLEN];
3713 char ds_hexsl[MAXNAMELEN];
3714
3715 if (!is_system_labeled())
3716 return (0);
3717
3718 if (zone_get_zonepath(zone_name, zonepath, sizeof (zonepath)) != Z_OK) {
3719 zerror(zlogp, B_TRUE, "unable to determine zone path");
3720 return (-1);
3721 }
3722
3723 if (!is_zonepath_zfs(zonepath))
3724 return (0);
3725
3726 if ((hdl = libzfs_init()) == NULL) {
3727 zerror(zlogp, B_FALSE, "opening ZFS library");
3728 return (-1);
3729 }
3730
3731 if ((zhp = zfs_path_to_zhandle(hdl, rootpath,
3732 ZFS_TYPE_FILESYSTEM)) == NULL) {
3733 zerror(zlogp, B_FALSE, "cannot open ZFS dataset for path '%s'",
3734 rootpath);
3735 libzfs_fini(hdl);
3736 return (-1);
3737 }
3738
3739 /* Get the mlslabel property if it exists. */
3740 if ((zfs_prop_get(zhp, ZFS_PROP_MLSLABEL, ds_hexsl, MAXNAMELEN,
3741 NULL, NULL, 0, B_TRUE) != 0) ||
3742 (strcmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0)) {
3743 char *str2 = NULL;
3744
3745 /*
3746 * No label on the dataset (or default only); create one.
3747 * (Only do this automatic labeling for the labeled brand.)
3748 */
3749 if (strcmp(brand_name, LABELED_BRAND_NAME) != 0) {
3750 error = 0;
3751 goto out;
3752 }
3753
3754 error = l_to_str_internal(zone_sl, &str2);
3755 if (error)
3756 goto out;
3757 if (str2 == NULL) {
3758 error = -1;
3759 goto out;
3760 }
3761 if ((error = zfs_prop_set(zhp,
3762 zfs_prop_to_name(ZFS_PROP_MLSLABEL), str2)) != 0) {
3763 zerror(zlogp, B_FALSE, "cannot set 'mlslabel' "
3764 "property for root dataset at '%s'\n", rootpath);
3765 }
3766 free(str2);
3767 goto out;
3768 }
3769
3770 /* Convert the retrieved dataset label to binary form. */
3771 error = hexstr_to_label(ds_hexsl, &ds_sl);
3772 if (error) {
3773 zerror(zlogp, B_FALSE, "invalid 'mlslabel' "
3774 "property on root dataset at '%s'\n", rootpath);
3775 goto out; /* exit with error */
3776 }
3777
3778 /*
3779 * Perform a MAC check by comparing the zone label with the
3780 * dataset label.
3781 */
3782 error = (!blequal(zone_sl, &ds_sl));
3783 if (error)
3784 zerror(zlogp, B_FALSE, "Rootpath dataset has mismatched label");
3785 out:
3786 zfs_close(zhp);
3787 libzfs_fini(hdl);
3788
3789 return (error);
3790 }
3791
3792 /*
3793 * Mount lower level home directories into/from current zone
3794 * Share exported directories specified in dfstab for zone
3795 */
3796 static int
3797 tsol_mounts(zlog_t *zlogp, char *zone_name, char *rootpath)
3798 {
3799 zoneid_t *zids = NULL;
3800 priv_set_t *zid_privs;
3801 const priv_impl_info_t *ip = NULL;
3802 uint_t nzents_saved;
3803 uint_t nzents;
3804 int i;
3805 char readonly[] = "ro";
3806 struct zone_fstab lower_fstab;
3807 char *argv[4];
3808
3809 if (!is_system_labeled())
3810 return (0);
3811
3812 if (zid_label == NULL) {
3813 zid_label = m_label_alloc(MAC_LABEL);
3814 if (zid_label == NULL)
3815 return (-1);
3816 }
3817
3818 /* Make sure our zone has an /export/home dir */
3819 (void) make_one_dir(zlogp, rootpath, "/export/home",
3820 DEFAULT_DIR_MODE, DEFAULT_DIR_USER, DEFAULT_DIR_GROUP);
3821
3822 lower_fstab.zone_fs_raw[0] = '\0';
3823 (void) strlcpy(lower_fstab.zone_fs_type, MNTTYPE_LOFS,
3824 sizeof (lower_fstab.zone_fs_type));
3825 lower_fstab.zone_fs_options = NULL;
3826 (void) zonecfg_add_fs_option(&lower_fstab, readonly);
3827
3828 /*
3829 * Get the list of zones from the kernel
3830 */
3831 if (zone_list(NULL, &nzents) != 0) {
3832 zerror(zlogp, B_TRUE, "unable to list zones");
3833 zonecfg_free_fs_option_list(lower_fstab.zone_fs_options);
3834 return (-1);
3835 }
3836 again:
3837 if (nzents == 0) {
3838 zonecfg_free_fs_option_list(lower_fstab.zone_fs_options);
3839 return (-1);
3840 }
3841
3842 zids = malloc(nzents * sizeof (zoneid_t));
3843 if (zids == NULL) {
3844 zerror(zlogp, B_TRUE, "memory allocation failed");
3845 return (-1);
3846 }
3847 nzents_saved = nzents;
3848
3849 if (zone_list(zids, &nzents) != 0) {
3850 zerror(zlogp, B_TRUE, "unable to list zones");
3851 zonecfg_free_fs_option_list(lower_fstab.zone_fs_options);
3852 free(zids);
3853 return (-1);
3854 }
3855 if (nzents != nzents_saved) {
3856 /* list changed, try again */
3857 free(zids);
3858 goto again;
3859 }
3860
3861 ip = getprivimplinfo();
3862 if ((zid_privs = priv_allocset()) == NULL) {
3863 zerror(zlogp, B_TRUE, "%s failed", "priv_allocset");
3864 zonecfg_free_fs_option_list(
3865 lower_fstab.zone_fs_options);
3866 free(zids);
3867 return (-1);
3868 }
3869
3870 for (i = 0; i < nzents; i++) {
3871 char zid_name[ZONENAME_MAX];
3872 zone_state_t zid_state;
3873 char zid_rpath[MAXPATHLEN];
3874 struct stat stat_buf;
3875
3876 if (zids[i] == GLOBAL_ZONEID)
3877 continue;
3878
3879 if (getzonenamebyid(zids[i], zid_name, ZONENAME_MAX) == -1)
3880 continue;
3881
3882 /*
3883 * Do special setup for the zone we are booting
3884 */
3885 if (strcmp(zid_name, zone_name) == 0) {
3886 struct zone_fstab autofs_fstab;
3887 char map_path[MAXPATHLEN];
3888 int fd;
3889
3890 /*
3891 * Create auto_home_<zone> map for this zone
3892 * in the global zone. The non-global zone entry
3893 * will be created by automount when the zone
3894 * is booted.
3895 */
3896
3897 (void) snprintf(autofs_fstab.zone_fs_special,
3898 MAXPATHLEN, "auto_home_%s", zid_name);
3899
3900 (void) snprintf(autofs_fstab.zone_fs_dir, MAXPATHLEN,
3901 "/zone/%s/home", zid_name);
3902
3903 (void) snprintf(map_path, sizeof (map_path),
3904 "/etc/%s", autofs_fstab.zone_fs_special);
3905 /*
3906 * If the map file doesn't exist create a template
3907 */
3908 if ((fd = open(map_path, O_RDWR | O_CREAT | O_EXCL,
3909 S_IRUSR | S_IWUSR | S_IRGRP| S_IROTH)) != -1) {
3910 int len;
3911 char map_rec[MAXPATHLEN];
3912
3913 len = snprintf(map_rec, sizeof (map_rec),
3914 "+%s\n*\t-fstype=lofs\t:%s/export/home/&\n",
3915 autofs_fstab.zone_fs_special, rootpath);
3916 (void) write(fd, map_rec, len);
3917 (void) close(fd);
3918 }
3919
3920 /*
3921 * Mount auto_home_<zone> in the global zone if absent.
3922 * If it's already of type autofs, then
3923 * don't mount it again.
3924 */
3925 if ((stat(autofs_fstab.zone_fs_dir, &stat_buf) == -1) ||
3926 strcmp(stat_buf.st_fstype, MNTTYPE_AUTOFS) != 0) {
3927 char optstr[] = "indirect,ignore,nobrowse";
3928
3929 (void) make_one_dir(zlogp, "",
3930 autofs_fstab.zone_fs_dir, DEFAULT_DIR_MODE,
3931 DEFAULT_DIR_USER, DEFAULT_DIR_GROUP);
3932
3933 /*
3934 * Mount will fail if automounter has already
3935 * processed the auto_home_<zonename> map
3936 */
3937 (void) domount(zlogp, MNTTYPE_AUTOFS, optstr,
3938 autofs_fstab.zone_fs_special,
3939 autofs_fstab.zone_fs_dir);
3940 }
3941 continue;
3942 }
3943
3944
3945 if (zone_get_state(zid_name, &zid_state) != Z_OK ||
3946 (zid_state != ZONE_STATE_READY &&
3947 zid_state != ZONE_STATE_RUNNING))
3948 /* Skip over zones without mounted filesystems */
3949 continue;
3950
3951 if (zone_getattr(zids[i], ZONE_ATTR_SLBL, zid_label,
3952 sizeof (m_label_t)) < 0)
3953 /* Skip over zones with unspecified label */
3954 continue;
3955
3956 if (zone_getattr(zids[i], ZONE_ATTR_ROOT, zid_rpath,
3957 sizeof (zid_rpath)) == -1)
3958 /* Skip over zones with bad path */
3959 continue;
3960
3961 if (zone_getattr(zids[i], ZONE_ATTR_PRIVSET, zid_privs,
3962 sizeof (priv_chunk_t) * ip->priv_setsize) == -1)
3963 /* Skip over zones with bad privs */
3964 continue;
3965
3966 /*
3967 * Reading down is valid according to our label model
3968 * but some customers want to disable it because it
3969 * allows execute down and other possible attacks.
3970 * Therefore, we restrict this feature to zones that
3971 * have the NET_MAC_AWARE privilege which is required
3972 * for NFS read-down semantics.
3973 */
3974 if ((bldominates(zlabel, zid_label)) &&
3975 (priv_ismember(zprivs, PRIV_NET_MAC_AWARE))) {
3976 /*
3977 * Our zone dominates this one.
3978 * Create a lofs mount from lower zone's /export/home
3979 */
3980 (void) snprintf(lower_fstab.zone_fs_dir, MAXPATHLEN,
3981 "%s/zone/%s/export/home", rootpath, zid_name);
3982
3983 /*
3984 * If the target is already an LOFS mount
3985 * then don't do it again.
3986 */
3987 if ((stat(lower_fstab.zone_fs_dir, &stat_buf) == -1) ||
3988 strcmp(stat_buf.st_fstype, MNTTYPE_LOFS) != 0) {
3989
3990 if (snprintf(lower_fstab.zone_fs_special,
3991 MAXPATHLEN, "%s/export",
3992 zid_rpath) > MAXPATHLEN)
3993 continue;
3994
3995 /*
3996 * Make sure the lower-level home exists
3997 */
3998 if (make_one_dir(zlogp,
3999 lower_fstab.zone_fs_special, "/home",
4000 DEFAULT_DIR_MODE, DEFAULT_DIR_USER,
4001 DEFAULT_DIR_GROUP) != 0)
4002 continue;
4003
4004 (void) strlcat(lower_fstab.zone_fs_special,
4005 "/home", MAXPATHLEN);
4006
4007 /*
4008 * Mount can fail because the lower-level
4009 * zone may have already done a mount up.
4010 */
4011 (void) mount_one(zlogp, &lower_fstab, "",
4012 Z_MNT_BOOT);
4013 }
4014 } else if ((bldominates(zid_label, zlabel)) &&
4015 (priv_ismember(zid_privs, PRIV_NET_MAC_AWARE))) {
4016 /*
4017 * This zone dominates our zone.
4018 * Create a lofs mount from our zone's /export/home
4019 */
4020 if (snprintf(lower_fstab.zone_fs_dir, MAXPATHLEN,
4021 "%s/zone/%s/export/home", zid_rpath,
4022 zone_name) > MAXPATHLEN)
4023 continue;
4024
4025 /*
4026 * If the target is already an LOFS mount
4027 * then don't do it again.
4028 */
4029 if ((stat(lower_fstab.zone_fs_dir, &stat_buf) == -1) ||
4030 strcmp(stat_buf.st_fstype, MNTTYPE_LOFS) != 0) {
4031
4032 (void) snprintf(lower_fstab.zone_fs_special,
4033 MAXPATHLEN, "%s/export/home", rootpath);
4034
4035 /*
4036 * Mount can fail because the higher-level
4037 * zone may have already done a mount down.
4038 */
4039 (void) mount_one(zlogp, &lower_fstab, "",
4040 Z_MNT_BOOT);
4041 }
4042 }
4043 }
4044 zonecfg_free_fs_option_list(lower_fstab.zone_fs_options);
4045 priv_freeset(zid_privs);
4046 free(zids);
4047
4048 /*
4049 * Now share any exported directories from this zone.
4050 * Each zone can have its own dfstab.
4051 */
4052
4053 argv[0] = "zoneshare";
4054 argv[1] = "-z";
4055 argv[2] = zone_name;
4056 argv[3] = NULL;
4057
4058 (void) forkexec(zlogp, "/usr/lib/zones/zoneshare", argv);
4059 /* Don't check for errors since they don't affect the zone */
4060
4061 return (0);
4062 }
4063
4064 /*
4065 * Unmount lofs mounts from higher level zones
4066 * Unshare nfs exported directories
4067 */
4068 static void
4069 tsol_unmounts(zlog_t *zlogp, char *zone_name)
4070 {
4071 zoneid_t *zids = NULL;
4072 uint_t nzents_saved;
4073 uint_t nzents;
4074 int i;
4075 char *argv[4];
4076 char path[MAXPATHLEN];
4077
4078 if (!is_system_labeled())
4079 return;
4080
4081 /*
4082 * Get the list of zones from the kernel
4083 */
4084 if (zone_list(NULL, &nzents) != 0) {
4085 return;
4086 }
4087
4088 if (zid_label == NULL) {
4089 zid_label = m_label_alloc(MAC_LABEL);
4090 if (zid_label == NULL)
4091 return;
4092 }
4093
4094 again:
4095 if (nzents == 0)
4096 return;
4097
4098 zids = malloc(nzents * sizeof (zoneid_t));
4099 if (zids == NULL) {
4100 zerror(zlogp, B_TRUE, "memory allocation failed");
4101 return;
4102 }
4103 nzents_saved = nzents;
4104
4105 if (zone_list(zids, &nzents) != 0) {
4106 free(zids);
4107 return;
4108 }
4109 if (nzents != nzents_saved) {
4110 /* list changed, try again */
4111 free(zids);
4112 goto again;
4113 }
4114
4115 for (i = 0; i < nzents; i++) {
4116 char zid_name[ZONENAME_MAX];
4117 zone_state_t zid_state;
4118 char zid_rpath[MAXPATHLEN];
4119
4120 if (zids[i] == GLOBAL_ZONEID)
4121 continue;
4122
4123 if (getzonenamebyid(zids[i], zid_name, ZONENAME_MAX) == -1)
4124 continue;
4125
4126 /*
4127 * Skip the zone we are halting
4128 */
4129 if (strcmp(zid_name, zone_name) == 0)
4130 continue;
4131
4132 if ((zone_getattr(zids[i], ZONE_ATTR_STATUS, &zid_state,
4133 sizeof (zid_state)) < 0) ||
4134 (zid_state < ZONE_IS_READY))
4135 /* Skip over zones without mounted filesystems */
4136 continue;
4137
4138 if (zone_getattr(zids[i], ZONE_ATTR_SLBL, zid_label,
4139 sizeof (m_label_t)) < 0)
4140 /* Skip over zones with unspecified label */
4141 continue;
4142
4143 if (zone_getattr(zids[i], ZONE_ATTR_ROOT, zid_rpath,
4144 sizeof (zid_rpath)) == -1)
4145 /* Skip over zones with bad path */
4146 continue;
4147
4148 if (zlabel != NULL && bldominates(zid_label, zlabel)) {
4149 /*
4150 * This zone dominates our zone.
4151 * Unmount the lofs mount of our zone's /export/home
4152 */
4153
4154 if (snprintf(path, MAXPATHLEN,
4155 "%s/zone/%s/export/home", zid_rpath,
4156 zone_name) > MAXPATHLEN)
4157 continue;
4158
4159 /* Skip over mount failures */
4160 (void) umount(path);
4161 }
4162 }
4163 free(zids);
4164
4165 /*
4166 * Unmount global zone autofs trigger for this zone
4167 */
4168 (void) snprintf(path, MAXPATHLEN, "/zone/%s/home", zone_name);
4169 /* Skip over mount failures */
4170 (void) umount(path);
4171
4172 /*
4173 * Next unshare any exported directories from this zone.
4174 */
4175
4176 argv[0] = "zoneunshare";
4177 argv[1] = "-z";
4178 argv[2] = zone_name;
4179 argv[3] = NULL;
4180
4181 (void) forkexec(zlogp, "/usr/lib/zones/zoneunshare", argv);
4182 /* Don't check for errors since they don't affect the zone */
4183
4184 /*
4185 * Finally, deallocate any devices in the zone.
4186 */
4187
4188 argv[0] = "deallocate";
4189 argv[1] = "-Isz";
4190 argv[2] = zone_name;
4191 argv[3] = NULL;
4192
4193 (void) forkexec(zlogp, "/usr/sbin/deallocate", argv);
4194 /* Don't check for errors since they don't affect the zone */
4195 }
4196
4197 /*
4198 * Fetch the Trusted Extensions label and multi-level ports (MLPs) for
4199 * this zone.
4200 */
4201 static tsol_zcent_t *
4202 get_zone_label(zlog_t *zlogp, priv_set_t *privs)
4203 {
4204 FILE *fp;
4205 tsol_zcent_t *zcent = NULL;
4206 char line[MAXTNZLEN];
4207
4208 if ((fp = fopen(TNZONECFG_PATH, "r")) == NULL) {
4209 zerror(zlogp, B_TRUE, "%s", TNZONECFG_PATH);
4210 return (NULL);
4211 }
4212
4213 while (fgets(line, sizeof (line), fp) != NULL) {
4214 /*
4215 * Check for malformed database
4216 */
4217 if (strlen(line) == MAXTNZLEN - 1)
4218 break;
4219 if ((zcent = tsol_sgetzcent(line, NULL, NULL)) == NULL)
4220 continue;
4221 if (strcmp(zcent->zc_name, zone_name) == 0)
4222 break;
4223 tsol_freezcent(zcent);
4224 zcent = NULL;
4225 }
4226 (void) fclose(fp);
4227
4228 if (zcent == NULL) {
4229 zerror(zlogp, B_FALSE, "zone requires a label assignment. "
4230 "See tnzonecfg(4)");
4231 } else {
4232 if (zlabel == NULL)
4233 zlabel = m_label_alloc(MAC_LABEL);
4234 /*
4235 * Save this zone's privileges for later read-down processing
4236 */
4237 if ((zprivs = priv_allocset()) == NULL) {
4238 zerror(zlogp, B_TRUE, "%s failed", "priv_allocset");
4239 return (NULL);
4240 } else {
4241 priv_copyset(privs, zprivs);
4242 }
4243 }
4244 return (zcent);
4245 }
4246
4247 /*
4248 * Add the Trusted Extensions multi-level ports for this zone.
4249 */
4250 static void
4251 set_mlps(zlog_t *zlogp, zoneid_t zoneid, tsol_zcent_t *zcent)
4252 {
4253 tsol_mlp_t *mlp;
4254 tsol_mlpent_t tsme;
4255
4256 if (!is_system_labeled())
4257 return;
4258
4259 tsme.tsme_zoneid = zoneid;
4260 tsme.tsme_flags = 0;
4261 for (mlp = zcent->zc_private_mlp; !TSOL_MLP_END(mlp); mlp++) {
4262 tsme.tsme_mlp = *mlp;
4263 if (tnmlp(TNDB_LOAD, &tsme) != 0) {
4264 zerror(zlogp, B_TRUE, "cannot set zone-specific MLP "
4265 "on %d-%d/%d", mlp->mlp_port,
4266 mlp->mlp_port_upper, mlp->mlp_ipp);
4267 }
4268 }
4269
4270 tsme.tsme_flags = TSOL_MEF_SHARED;
4271 for (mlp = zcent->zc_shared_mlp; !TSOL_MLP_END(mlp); mlp++) {
4272 tsme.tsme_mlp = *mlp;
4273 if (tnmlp(TNDB_LOAD, &tsme) != 0) {
4274 zerror(zlogp, B_TRUE, "cannot set shared MLP "
4275 "on %d-%d/%d", mlp->mlp_port,
4276 mlp->mlp_port_upper, mlp->mlp_ipp);
4277 }
4278 }
4279 }
4280
4281 static void
4282 remove_mlps(zlog_t *zlogp, zoneid_t zoneid)
4283 {
4284 tsol_mlpent_t tsme;
4285
4286 if (!is_system_labeled())
4287 return;
4288
4289 (void) memset(&tsme, 0, sizeof (tsme));
4290 tsme.tsme_zoneid = zoneid;
4291 if (tnmlp(TNDB_FLUSH, &tsme) != 0)
4292 zerror(zlogp, B_TRUE, "cannot flush MLPs");
4293 }
4294
4295 int
4296 prtmount(const struct mnttab *fs, void *x)
4297 {
4298 zerror((zlog_t *)x, B_FALSE, " %s", fs->mnt_mountp);
4299 return (0);
4300 }
4301
4302 /*
4303 * Look for zones running on the main system that are using this root (or any
4304 * subdirectory of it). Return B_TRUE and print an error if a conflicting zone
4305 * is found or if we can't tell.
4306 */
4307 static boolean_t
4308 duplicate_zone_root(zlog_t *zlogp, const char *rootpath)
4309 {
4310 zoneid_t *zids = NULL;
4311 uint_t nzids = 0;
4312 boolean_t retv;
4313 int rlen, zlen;
4314 char zroot[MAXPATHLEN];
4315 char zonename[ZONENAME_MAX];
4316
4317 for (;;) {
4318 nzids += 10;
4319 zids = malloc(nzids * sizeof (*zids));
4320 if (zids == NULL) {
4321 zerror(zlogp, B_TRUE, "memory allocation failed");
4322 return (B_TRUE);
4323 }
4324 if (zone_list(zids, &nzids) == 0)
4325 break;
4326 free(zids);
4327 }
4328 retv = B_FALSE;
4329 rlen = strlen(rootpath);
4330 while (nzids > 0) {
4331 /*
4332 * Ignore errors; they just mean that the zone has disappeared
4333 * while we were busy.
4334 */
4335 if (zone_getattr(zids[--nzids], ZONE_ATTR_ROOT, zroot,
4336 sizeof (zroot)) == -1)
4337 continue;
4338 zlen = strlen(zroot);
4339 if (zlen > rlen)
4340 zlen = rlen;
4341 if (strncmp(rootpath, zroot, zlen) == 0 &&
4342 (zroot[zlen] == '\0' || zroot[zlen] == '/') &&
4343 (rootpath[zlen] == '\0' || rootpath[zlen] == '/')) {
4344 if (getzonenamebyid(zids[nzids], zonename,
4345 sizeof (zonename)) == -1)
4346 (void) snprintf(zonename, sizeof (zonename),
4347 "id %d", (int)zids[nzids]);
4348 zerror(zlogp, B_FALSE,
4349 "zone root %s already in use by zone %s",
4350 rootpath, zonename);
4351 retv = B_TRUE;
4352 break;
4353 }
4354 }
4355 free(zids);
4356 return (retv);
4357 }
4358
4359 /*
4360 * Search for loopback mounts that use this same source node (same device and
4361 * inode). Return B_TRUE if there is one or if we can't tell.
4362 */
4363 static boolean_t
4364 duplicate_reachable_path(zlog_t *zlogp, const char *rootpath)
4365 {
4366 struct stat64 rst, zst;
4367 struct mnttab *mnp;
4368
4369 if (stat64(rootpath, &rst) == -1) {
4370 zerror(zlogp, B_TRUE, "can't stat %s", rootpath);
4371 return (B_TRUE);
4372 }
4373 if (resolve_lofs_mnts == NULL && lofs_read_mnttab(zlogp) == -1)
4374 return (B_TRUE);
4375 for (mnp = resolve_lofs_mnts; mnp < resolve_lofs_mnt_max; mnp++) {
4376 if (mnp->mnt_fstype == NULL ||
4377 strcmp(MNTTYPE_LOFS, mnp->mnt_fstype) != 0)
4378 continue;
4379 /* We're looking at a loopback mount. Stat it. */
4380 if (mnp->mnt_special != NULL &&
4381 stat64(mnp->mnt_special, &zst) != -1 &&
4382 rst.st_dev == zst.st_dev && rst.st_ino == zst.st_ino) {
4383 zerror(zlogp, B_FALSE,
4384 "zone root %s is reachable through %s",
4385 rootpath, mnp->mnt_mountp);
4386 return (B_TRUE);
4387 }
4388 }
4389 return (B_FALSE);
4390 }
4391
4392 /*
4393 * Set memory cap and pool info for the zone's resource management
4394 * configuration.
4395 */
4396 static int
4397 setup_zone_rm(zlog_t *zlogp, char *zone_name, zoneid_t zoneid)
4398 {
4399 int res;
4400 uint64_t tmp;
4401 struct zone_mcaptab mcap;
4402 char sched[MAXNAMELEN];
4403 zone_dochandle_t handle = NULL;
4404 char pool_err[128];
4405
4406 if ((handle = zonecfg_init_handle()) == NULL) {
4407 zerror(zlogp, B_TRUE, "getting zone configuration handle");
4408 return (Z_BAD_HANDLE);
4409 }
4410
4411 if ((res = zonecfg_get_snapshot_handle(zone_name, handle)) != Z_OK) {
4412 zerror(zlogp, B_FALSE, "invalid configuration");
4413 zonecfg_fini_handle(handle);
4414 return (res);
4415 }
4416
4417 /*
4418 * If a memory cap is configured, set the cap in the kernel using
4419 * zone_setattr() and make sure the rcapd SMF service is enabled.
4420 */
4421 if (zonecfg_getmcapent(handle, &mcap) == Z_OK) {
4422 uint64_t num;
4423 char smf_err[128];
4424
4425 num = (uint64_t)strtoull(mcap.zone_physmem_cap, NULL, 10);
4426 if (zone_setattr(zoneid, ZONE_ATTR_PHYS_MCAP, &num, 0) == -1) {
4427 zerror(zlogp, B_TRUE, "could not set zone memory cap");
4428 zonecfg_fini_handle(handle);
4429 return (Z_INVAL);
4430 }
4431
4432 if (zonecfg_enable_rcapd(smf_err, sizeof (smf_err)) != Z_OK) {
4433 zerror(zlogp, B_FALSE, "enabling system/rcap service "
4434 "failed: %s", smf_err);
4435 zonecfg_fini_handle(handle);
4436 return (Z_INVAL);
4437 }
4438 }
4439
4440 /* Get the scheduling class set in the zone configuration. */
4441 if (zonecfg_get_sched_class(handle, sched, sizeof (sched)) == Z_OK &&
4442 strlen(sched) > 0) {
4443 if (zone_setattr(zoneid, ZONE_ATTR_SCHED_CLASS, sched,
4444 strlen(sched)) == -1)
4445 zerror(zlogp, B_TRUE, "WARNING: unable to set the "
4446 "default scheduling class");
4447
4448 } else if (zonecfg_get_aliased_rctl(handle, ALIAS_SHARES, &tmp)
4449 == Z_OK) {
4450 /*
4451 * If the zone has the zone.cpu-shares rctl set then we want to
4452 * use the Fair Share Scheduler (FSS) for processes in the
4453 * zone. Check what scheduling class the zone would be running
4454 * in by default so we can print a warning and modify the class
4455 * if we wouldn't be using FSS.
4456 */
4457 char class_name[PC_CLNMSZ];
4458
4459 if (zonecfg_get_dflt_sched_class(handle, class_name,
4460 sizeof (class_name)) != Z_OK) {
4461 zerror(zlogp, B_FALSE, "WARNING: unable to determine "
4462 "the zone's scheduling class");
4463
4464 } else if (strcmp("FSS", class_name) != 0) {
4465 zerror(zlogp, B_FALSE, "WARNING: The zone.cpu-shares "
4466 "rctl is set but\nFSS is not the default "
4467 "scheduling class for\nthis zone. FSS will be "
4468 "used for processes\nin the zone but to get the "
4469 "full benefit of FSS,\nit should be the default "
4470 "scheduling class.\nSee dispadmin(1M) for more "
4471 "details.");
4472
4473 if (zone_setattr(zoneid, ZONE_ATTR_SCHED_CLASS, "FSS",
4474 strlen("FSS")) == -1)
4475 zerror(zlogp, B_TRUE, "WARNING: unable to set "
4476 "zone scheduling class to FSS");
4477 }
4478 }
4479
4480 /*
4481 * The next few blocks of code attempt to set up temporary pools as
4482 * well as persistent pools. In all cases we call the functions
4483 * unconditionally. Within each funtion the code will check if the
4484 * zone is actually configured for a temporary pool or persistent pool
4485 * and just return if there is nothing to do.
4486 *
4487 * If we are rebooting we want to attempt to reuse any temporary pool
4488 * that was previously set up. zonecfg_bind_tmp_pool() will do the
4489 * right thing in all cases (reuse or create) based on the current
4490 * zonecfg.
4491 */
4492 if ((res = zonecfg_bind_tmp_pool(handle, zoneid, pool_err,
4493 sizeof (pool_err))) != Z_OK) {
4494 if (res == Z_POOL || res == Z_POOL_CREATE || res == Z_POOL_BIND)
4495 zerror(zlogp, B_FALSE, "%s: %s\ndedicated-cpu setting "
4496 "cannot be instantiated", zonecfg_strerror(res),
4497 pool_err);
4498 else
4499 zerror(zlogp, B_FALSE, "could not bind zone to "
4500 "temporary pool: %s", zonecfg_strerror(res));
4501 zonecfg_fini_handle(handle);
4502 return (Z_POOL_BIND);
4503 }
4504
4505 /*
4506 * Check if we need to warn about poold not being enabled.
4507 */
4508 if (zonecfg_warn_poold(handle)) {
4509 zerror(zlogp, B_FALSE, "WARNING: A range of dedicated-cpus has "
4510 "been specified\nbut the dynamic pool service is not "
4511 "enabled.\nThe system will not dynamically adjust the\n"
4512 "processor allocation within the specified range\n"
4513 "until svc:/system/pools/dynamic is enabled.\n"
4514 "See poold(1M).");
4515 }
4516
4517 /* The following is a warning, not an error. */
4518 if ((res = zonecfg_bind_pool(handle, zoneid, pool_err,
4519 sizeof (pool_err))) != Z_OK) {
4520 if (res == Z_POOL_BIND)
4521 zerror(zlogp, B_FALSE, "WARNING: unable to bind to "
4522 "pool '%s'; using default pool.", pool_err);
4523 else if (res == Z_POOL)
4524 zerror(zlogp, B_FALSE, "WARNING: %s: %s",
4525 zonecfg_strerror(res), pool_err);
4526 else
4527 zerror(zlogp, B_FALSE, "WARNING: %s",
4528 zonecfg_strerror(res));
4529 }
4530
4531 /* Update saved pool name in case it has changed */
4532 (void) zonecfg_get_poolname(handle, zone_name, pool_name,
4533 sizeof (pool_name));
4534
4535 zonecfg_fini_handle(handle);
4536 return (Z_OK);
4537 }
4538
4539 static void
4540 report_prop_err(zlog_t *zlogp, const char *name, const char *value, int res)
4541 {
4542 switch (res) {
4543 case Z_TOO_BIG:
4544 zerror(zlogp, B_FALSE, "%s property value is too large.", name);
4545 break;
4546
4547 case Z_INVALID_PROPERTY:
4548 zerror(zlogp, B_FALSE, "%s property value \"%s\" is not valid",
4549 name, value);
4550 break;
4551
4552 default:
4553 zerror(zlogp, B_TRUE, "fetching property %s: %d", name, res);
4554 break;
4555 }
4556 }
4557
4558 /*
4559 * Sets the hostid of the new zone based on its configured value. The zone's
4560 * zone_t structure must already exist in kernel memory. 'zlogp' refers to the
4561 * log used to report errors and warnings and must be non-NULL. 'zone_namep'
4562 * is the name of the new zone and must be non-NULL. 'zoneid' is the numeric
4563 * ID of the new zone.
4564 *
4565 * This function returns zero on success and a nonzero error code on failure.
4566 */
4567 static int
4568 setup_zone_hostid(zone_dochandle_t handle, zlog_t *zlogp, zoneid_t zoneid)
4569 {
4570 int res;
4571 char hostidp[HW_HOSTID_LEN];
4572 unsigned int hostid;
4573
4574 res = zonecfg_get_hostid(handle, hostidp, sizeof (hostidp));
4575
4576 if (res == Z_BAD_PROPERTY) {
4577 return (Z_OK);
4578 } else if (res != Z_OK) {
4579 report_prop_err(zlogp, "hostid", hostidp, res);
4580 return (res);
4581 }
4582
4583 hostid = (unsigned int)strtoul(hostidp, NULL, 16);
4584 if ((res = zone_setattr(zoneid, ZONE_ATTR_HOSTID, &hostid,
4585 sizeof (hostid))) != 0) {
4586 zerror(zlogp, B_TRUE,
4587 "zone hostid is not valid: %s: %d", hostidp, res);
4588 return (Z_SYSTEM);
4589 }
4590
4591 return (res);
4592 }
4593
4594 static int
4595 setup_zone_fs_allowed(zone_dochandle_t handle, zlog_t *zlogp, zoneid_t zoneid)
4596 {
4597 char fsallowed[ZONE_FS_ALLOWED_MAX];
4598 char *fsallowedp = fsallowed;
4599 int len = sizeof (fsallowed);
4600 int res;
4601
4602 res = zonecfg_get_fs_allowed(handle, fsallowed, len);
4603
4604 if (res == Z_BAD_PROPERTY) {
4605 /* No value, set the defaults */
4606 (void) strlcpy(fsallowed, DFLT_FS_ALLOWED, len);
4607 } else if (res != Z_OK) {
4608 report_prop_err(zlogp, "fs-allowed", fsallowed, res);
4609 return (res);
4610 } else if (fsallowed[0] == '-') {
4611 /* dropping default privs - use remaining list */
4612 if (fsallowed[1] != ',')
4613 return (Z_OK);
4614 fsallowedp += 2;
4615 len -= 2;
4616 } else {
4617 /* Has a value, append the defaults */
4618 if (strlcat(fsallowed, ",", len) >= len ||
4619 strlcat(fsallowed, DFLT_FS_ALLOWED, len) >= len) {
4620 report_prop_err(zlogp, "fs-allowed", fsallowed,
4621 Z_TOO_BIG);
4622 return (Z_TOO_BIG);
4623 }
4624 }
4625
4626 if (zone_setattr(zoneid, ZONE_ATTR_FS_ALLOWED, fsallowedp, len) != 0) {
4627 zerror(zlogp, B_TRUE,
4628 "fs-allowed couldn't be set: %s: %d", fsallowedp, res);
4629 return (Z_SYSTEM);
4630 }
4631
4632 return (Z_OK);
4633 }
4634
4635 static int
4636 setup_zone_attrs(zlog_t *zlogp, char *zone_namep, zoneid_t zoneid)
4637 {
4638 zone_dochandle_t handle;
4639 int res = Z_OK;
4640
4641 if ((handle = zonecfg_init_handle()) == NULL) {
4642 zerror(zlogp, B_TRUE, "getting zone configuration handle");
4643 return (Z_BAD_HANDLE);
4644 }
4645 if ((res = zonecfg_get_snapshot_handle(zone_namep, handle)) != Z_OK) {
4646 zerror(zlogp, B_FALSE, "invalid configuration");
4647 goto out;
4648 }
4649
4650 if ((res = setup_zone_hostid(handle, zlogp, zoneid)) != Z_OK)
4651 goto out;
4652
4653 if ((res = setup_zone_fs_allowed(handle, zlogp, zoneid)) != Z_OK)
4654 goto out;
4655
4656 out:
4657 zonecfg_fini_handle(handle);
4658 return (res);
4659 }
4660
4661 zoneid_t
4662 vplat_create(zlog_t *zlogp, zone_mnt_t mount_cmd)
4663 {
4664 zoneid_t rval = -1;
4665 priv_set_t *privs;
4666 char rootpath[MAXPATHLEN];
4667 char *rctlbuf = NULL;
4668 size_t rctlbufsz = 0;
4669 char *zfsbuf = NULL;
4670 size_t zfsbufsz = 0;
4671 zoneid_t zoneid = -1;
4672 int xerr;
4673 char *kzone;
4674 FILE *fp = NULL;
4675 tsol_zcent_t *zcent = NULL;
4676 int match = 0;
4677 int doi = 0;
4678 int flags;
4679 zone_iptype_t iptype;
4680
4681 if (zone_get_rootpath(zone_name, rootpath, sizeof (rootpath)) != Z_OK) {
4682 zerror(zlogp, B_TRUE, "unable to determine zone root");
4683 return (-1);
4684 }
4685 if (zonecfg_in_alt_root())
4686 resolve_lofs(zlogp, rootpath, sizeof (rootpath));
4687
4688 if (vplat_get_iptype(zlogp, &iptype) < 0) {
4689 zerror(zlogp, B_TRUE, "unable to determine ip-type");
4690 return (-1);
4691 }
4692 switch (iptype) {
4693 case ZS_SHARED:
4694 flags = 0;
4695 break;
4696 case ZS_EXCLUSIVE:
4697 flags = ZCF_NET_EXCL;
4698 break;
4699 }
4700
4701 if ((privs = priv_allocset()) == NULL) {
4702 zerror(zlogp, B_TRUE, "%s failed", "priv_allocset");
4703 return (-1);
4704 }
4705 priv_emptyset(privs);
4706 if (get_privset(zlogp, privs, mount_cmd) != 0)
4707 goto error;
4708
4709 if (mount_cmd == Z_MNT_BOOT &&
4710 get_rctls(zlogp, &rctlbuf, &rctlbufsz) != 0) {
4711 zerror(zlogp, B_FALSE, "Unable to get list of rctls");
4712 goto error;
4713 }
4714
4715 if (get_datasets(zlogp, &zfsbuf, &zfsbufsz) != 0) {
4716 zerror(zlogp, B_FALSE, "Unable to get list of ZFS datasets");
4717 goto error;
4718 }
4719
4720 if (mount_cmd == Z_MNT_BOOT && is_system_labeled()) {
4721 zcent = get_zone_label(zlogp, privs);
4722 if (zcent != NULL) {
4723 match = zcent->zc_match;
4724 doi = zcent->zc_doi;
4725 *zlabel = zcent->zc_label;
4726 } else {
4727 goto error;
4728 }
4729 if (validate_rootds_label(zlogp, rootpath, zlabel) != 0)
4730 goto error;
4731 }
4732
4733 kzone = zone_name;
4734
4735 /*
4736 * We must do this scan twice. First, we look for zones running on the
4737 * main system that are using this root (or any subdirectory of it).
4738 * Next, we reduce to the shortest path and search for loopback mounts
4739 * that use this same source node (same device and inode).
4740 */
4741 if (duplicate_zone_root(zlogp, rootpath))
4742 goto error;
4743 if (duplicate_reachable_path(zlogp, rootpath))
4744 goto error;
4745
4746 if (ALT_MOUNT(mount_cmd)) {
4747 root_to_lu(zlogp, rootpath, sizeof (rootpath), B_TRUE);
4748
4749 /*
4750 * Forge up a special root for this zone. When a zone is
4751 * mounted, we can't let the zone have its own root because the
4752 * tools that will be used in this "scratch zone" need access
4753 * to both the zone's resources and the running machine's
4754 * executables.
4755 *
4756 * Note that the mkdir here also catches read-only filesystems.
4757 */
4758 if (mkdir(rootpath, 0755) != 0 && errno != EEXIST) {
4759 zerror(zlogp, B_TRUE, "cannot create %s", rootpath);
4760 goto error;
4761 }
4762 if (domount(zlogp, "tmpfs", "", "swap", rootpath) != 0)
4763 goto error;
4764 }
4765
4766 if (zonecfg_in_alt_root()) {
4767 /*
4768 * If we are mounting up a zone in an alternate root partition,
4769 * then we have some additional work to do before starting the
4770 * zone. First, resolve the root path down so that we're not
4771 * fooled by duplicates. Then forge up an internal name for
4772 * the zone.
4773 */
4774 if ((fp = zonecfg_open_scratch("", B_TRUE)) == NULL) {
4775 zerror(zlogp, B_TRUE, "cannot open mapfile");
4776 goto error;
4777 }
4778 if (zonecfg_lock_scratch(fp) != 0) {
4779 zerror(zlogp, B_TRUE, "cannot lock mapfile");
4780 goto error;
4781 }
4782 if (zonecfg_find_scratch(fp, zone_name, zonecfg_get_root(),
4783 NULL, 0) == 0) {
4784 zerror(zlogp, B_FALSE, "scratch zone already running");
4785 goto error;
4786 }
4787 /* This is the preferred name */
4788 (void) snprintf(kernzone, sizeof (kernzone), "SUNWlu-%s",
4789 zone_name);
4790 srandom(getpid());
4791 while (zonecfg_reverse_scratch(fp, kernzone, NULL, 0, NULL,
4792 0) == 0) {
4793 /* This is just an arbitrary name; note "." usage */
4794 (void) snprintf(kernzone, sizeof (kernzone),
4795 "SUNWlu.%08lX%08lX", random(), random());
4796 }
4797 kzone = kernzone;
4798 }
4799
4800 xerr = 0;
4801 if ((zoneid = zone_create(kzone, rootpath, privs, rctlbuf,
4802 rctlbufsz, zfsbuf, zfsbufsz, &xerr, match, doi, zlabel,
4803 flags)) == -1) {
4804 if (xerr == ZE_AREMOUNTS) {
4805 if (zonecfg_find_mounts(rootpath, NULL, NULL) < 1) {
4806 zerror(zlogp, B_FALSE,
4807 "An unknown file-system is mounted on "
4808 "a subdirectory of %s", rootpath);
4809 } else {
4810
4811 zerror(zlogp, B_FALSE,
4812 "These file-systems are mounted on "
4813 "subdirectories of %s:", rootpath);
4814 (void) zonecfg_find_mounts(rootpath,
4815 prtmount, zlogp);
4816 }
4817 } else if (xerr == ZE_CHROOTED) {
4818 zerror(zlogp, B_FALSE, "%s: "
4819 "cannot create a zone from a chrooted "
4820 "environment", "zone_create");
4821 } else if (xerr == ZE_LABELINUSE) {
4822 char zonename[ZONENAME_MAX];
4823 (void) getzonenamebyid(getzoneidbylabel(zlabel),
4824 zonename, ZONENAME_MAX);
4825 zerror(zlogp, B_FALSE, "The zone label is already "
4826 "used by the zone '%s'.", zonename);
4827 } else {
4828 zerror(zlogp, B_TRUE, "%s failed", "zone_create");
4829 }
4830 goto error;
4831 }
4832
4833 if (zonecfg_in_alt_root() &&
4834 zonecfg_add_scratch(fp, zone_name, kernzone,
4835 zonecfg_get_root()) == -1) {
4836 zerror(zlogp, B_TRUE, "cannot add mapfile entry");
4837 goto error;
4838 }
4839
4840 /*
4841 * The following actions are not performed when merely mounting a zone
4842 * for administrative use.
4843 */
4844 if (mount_cmd == Z_MNT_BOOT) {
4845 brand_handle_t bh;
4846 struct brand_attr attr;
4847 char modname[MAXPATHLEN];
4848
4849 if (setup_zone_attrs(zlogp, zone_name, zoneid) != Z_OK)
4850 goto error;
4851
4852 if ((bh = brand_open(brand_name)) == NULL) {
4853 zerror(zlogp, B_FALSE,
4854 "unable to determine brand name");
4855 goto error;
4856 }
4857
4858 if (!is_system_labeled() &&
4859 (strcmp(brand_name, LABELED_BRAND_NAME) == 0)) {
4860 brand_close(bh);
4861 zerror(zlogp, B_FALSE,
4862 "cannot boot labeled zone on unlabeled system");
4863 goto error;
4864 }
4865
4866 /*
4867 * If this brand requires any kernel support, now is the time to
4868 * get it loaded and initialized.
4869 */
4870 if (brand_get_modname(bh, modname, MAXPATHLEN) < 0) {
4871 brand_close(bh);
4872 zerror(zlogp, B_FALSE,
4873 "unable to determine brand kernel module");
4874 goto error;
4875 }
4876 brand_close(bh);
4877
4878 if (strlen(modname) > 0) {
4879 (void) strlcpy(attr.ba_brandname, brand_name,
4880 sizeof (attr.ba_brandname));
4881 (void) strlcpy(attr.ba_modname, modname,
4882 sizeof (attr.ba_modname));
4883 if (zone_setattr(zoneid, ZONE_ATTR_BRAND, &attr,
4884 sizeof (attr) != 0)) {
4885 zerror(zlogp, B_TRUE,
4886 "could not set zone brand attribute.");
4887 goto error;
4888 }
4889 }
4890
4891 if (setup_zone_rm(zlogp, zone_name, zoneid) != Z_OK)
4892 goto error;
4893
4894 set_mlps(zlogp, zoneid, zcent);
4895 }
4896
4897 rval = zoneid;
4898 zoneid = -1;
4899
4900 error:
4901 if (zoneid != -1) {
4902 (void) zone_shutdown(zoneid);
4903 (void) zone_destroy(zoneid);
4904 }
4905 if (rctlbuf != NULL)
4906 free(rctlbuf);
4907 priv_freeset(privs);
4908 if (fp != NULL)
4909 zonecfg_close_scratch(fp);
4910 lofs_discard_mnttab();
4911 if (zcent != NULL)
4912 tsol_freezcent(zcent);
4913 return (rval);
4914 }
4915
4916 /*
4917 * Enter the zone and write a /etc/zones/index file there. This allows
4918 * libzonecfg (and thus zoneadm) to report the UUID and potentially other zone
4919 * details from inside the zone.
4920 */
4921 static void
4922 write_index_file(zoneid_t zoneid)
4923 {
4924 FILE *zef;
4925 FILE *zet;
4926 struct zoneent *zep;
4927 pid_t child;
4928 int tmpl_fd;
4929 ctid_t ct;
4930 int fd;
4931 char uuidstr[UUID_PRINTABLE_STRING_LENGTH];
4932
4933 /* Locate the zone entry in the global zone's index file */
4934 if ((zef = setzoneent()) == NULL)
4935 return;
4936 while ((zep = getzoneent_private(zef)) != NULL) {
4937 if (strcmp(zep->zone_name, zone_name) == 0)
4938 break;
4939 free(zep);
4940 }
4941 endzoneent(zef);
4942 if (zep == NULL)
4943 return;
4944
4945 if ((tmpl_fd = init_template()) == -1) {
4946 free(zep);
4947 return;
4948 }
4949
4950 if ((child = fork()) == -1) {
4951 (void) ct_tmpl_clear(tmpl_fd);
4952 (void) close(tmpl_fd);
4953 free(zep);
4954 return;
4955 }
4956
4957 /* parent waits for child to finish */
4958 if (child != 0) {
4959 free(zep);
4960 if (contract_latest(&ct) == -1)
4961 ct = -1;
4962 (void) ct_tmpl_clear(tmpl_fd);
4963 (void) close(tmpl_fd);
4964 (void) waitpid(child, NULL, 0);
4965 (void) contract_abandon_id(ct);
4966 return;
4967 }
4968
4969 /* child enters zone and sets up index file */
4970 (void) ct_tmpl_clear(tmpl_fd);
4971 if (zone_enter(zoneid) != -1) {
4972 (void) mkdir(ZONE_CONFIG_ROOT, ZONE_CONFIG_MODE);
4973 (void) chown(ZONE_CONFIG_ROOT, ZONE_CONFIG_UID,
4974 ZONE_CONFIG_GID);
4975 fd = open(ZONE_INDEX_FILE, O_WRONLY|O_CREAT|O_TRUNC,
4976 ZONE_INDEX_MODE);
4977 if (fd != -1 && (zet = fdopen(fd, "w")) != NULL) {
4978 (void) fchown(fd, ZONE_INDEX_UID, ZONE_INDEX_GID);
4979 if (uuid_is_null(zep->zone_uuid))
4980 uuidstr[0] = '\0';
4981 else
4982 uuid_unparse(zep->zone_uuid, uuidstr);
4983 (void) fprintf(zet, "%s:%s:/:%s\n", zep->zone_name,
4984 zone_state_str(zep->zone_state),
4985 uuidstr);
4986 (void) fclose(zet);
4987 }
4988 }
4989 _exit(0);
4990 }
4991
4992 int
4993 vplat_bringup(zlog_t *zlogp, zone_mnt_t mount_cmd, zoneid_t zoneid)
4994 {
4995 char zonepath[MAXPATHLEN];
4996
4997 if (mount_cmd == Z_MNT_BOOT && validate_datasets(zlogp) != 0) {
4998 lofs_discard_mnttab();
4999 return (-1);
5000 }
5001
5002 /*
5003 * Before we try to mount filesystems we need to create the
5004 * attribute backing store for /dev
5005 */
5006 if (zone_get_zonepath(zone_name, zonepath, sizeof (zonepath)) != Z_OK) {
5007 lofs_discard_mnttab();
5008 return (-1);
5009 }
5010 resolve_lofs(zlogp, zonepath, sizeof (zonepath));
5011
5012 /* Make /dev directory owned by root, grouped sys */
5013 if (make_one_dir(zlogp, zonepath, "/dev", DEFAULT_DIR_MODE,
5014 0, 3) != 0) {
5015 lofs_discard_mnttab();
5016 return (-1);
5017 }
5018
5019 if (mount_filesystems(zlogp, mount_cmd) != 0) {
5020 lofs_discard_mnttab();
5021 return (-1);
5022 }
5023
5024 if (mount_cmd == Z_MNT_BOOT) {
5025 zone_iptype_t iptype;
5026
5027 if (vplat_get_iptype(zlogp, &iptype) < 0) {
5028 zerror(zlogp, B_TRUE, "unable to determine ip-type");
5029 lofs_discard_mnttab();
5030 return (-1);
5031 }
5032
5033 switch (iptype) {
5034 case ZS_SHARED:
5035 /* Always do this to make lo0 get configured */
5036 if (configure_shared_network_interfaces(zlogp) != 0) {
5037 lofs_discard_mnttab();
5038 return (-1);
5039 }
5040 break;
5041 case ZS_EXCLUSIVE:
5042 if (configure_exclusive_network_interfaces(zlogp,
5043 zoneid) !=
5044 0) {
5045 lofs_discard_mnttab();
5046 return (-1);
5047 }
5048 break;
5049 }
5050 }
5051
5052 write_index_file(zoneid);
5053
5054 lofs_discard_mnttab();
5055 return (0);
5056 }
5057
5058 static int
5059 lu_root_teardown(zlog_t *zlogp)
5060 {
5061 char zroot[MAXPATHLEN];
5062
5063 if (zone_get_rootpath(zone_name, zroot, sizeof (zroot)) != Z_OK) {
5064 zerror(zlogp, B_FALSE, "unable to determine zone root");
5065 return (-1);
5066 }
5067 root_to_lu(zlogp, zroot, sizeof (zroot), B_FALSE);
5068
5069 /*
5070 * At this point, the processes are gone, the filesystems (save the
5071 * root) are unmounted, and the zone is on death row. But there may
5072 * still be creds floating about in the system that reference the
5073 * zone_t, and which pin down zone_rootvp causing this call to fail
5074 * with EBUSY. Thus, we try for a little while before just giving up.
5075 * (How I wish this were not true, and umount2 just did the right
5076 * thing, or tmpfs supported MS_FORCE This is a gross hack.)
5077 */
5078 if (umount2(zroot, MS_FORCE) != 0) {
5079 if (errno == ENOTSUP && umount2(zroot, 0) == 0)
5080 goto unmounted;
5081 if (errno == EBUSY) {
5082 int tries = 10;
5083
5084 while (--tries >= 0) {
5085 (void) sleep(1);
5086 if (umount2(zroot, 0) == 0)
5087 goto unmounted;
5088 if (errno != EBUSY)
5089 break;
5090 }
5091 }
5092 zerror(zlogp, B_TRUE, "unable to unmount '%s'", zroot);
5093 return (-1);
5094 }
5095 unmounted:
5096
5097 /*
5098 * Only zones in an alternate root environment have scratch zone
5099 * entries.
5100 */
5101 if (zonecfg_in_alt_root()) {
5102 FILE *fp;
5103 int retv;
5104
5105 if ((fp = zonecfg_open_scratch("", B_FALSE)) == NULL) {
5106 zerror(zlogp, B_TRUE, "cannot open mapfile");
5107 return (-1);
5108 }
5109 retv = -1;
5110 if (zonecfg_lock_scratch(fp) != 0)
5111 zerror(zlogp, B_TRUE, "cannot lock mapfile");
5112 else if (zonecfg_delete_scratch(fp, kernzone) != 0)
5113 zerror(zlogp, B_TRUE, "cannot delete map entry");
5114 else
5115 retv = 0;
5116 zonecfg_close_scratch(fp);
5117 return (retv);
5118 } else {
5119 return (0);
5120 }
5121 }
5122
5123 int
5124 vplat_teardown(zlog_t *zlogp, boolean_t unmount_cmd, boolean_t rebooting)
5125 {
5126 char *kzone;
5127 zoneid_t zoneid;
5128 int res;
5129 char pool_err[128];
5130 char zpath[MAXPATHLEN];
5131 char cmdbuf[MAXPATHLEN];
5132 brand_handle_t bh = NULL;
5133 dladm_status_t status;
5134 char errmsg[DLADM_STRSIZE];
5135 ushort_t flags;
5136
5137 kzone = zone_name;
5138 if (zonecfg_in_alt_root()) {
5139 FILE *fp;
5140
5141 if ((fp = zonecfg_open_scratch("", B_FALSE)) == NULL) {
5142 zerror(zlogp, B_TRUE, "unable to open map file");
5143 goto error;
5144 }
5145 if (zonecfg_find_scratch(fp, zone_name, zonecfg_get_root(),
5146 kernzone, sizeof (kernzone)) != 0) {
5147 zerror(zlogp, B_FALSE, "unable to find scratch zone");
5148 zonecfg_close_scratch(fp);
5149 goto error;
5150 }
5151 zonecfg_close_scratch(fp);
5152 kzone = kernzone;
5153 }
5154
5155 if ((zoneid = getzoneidbyname(kzone)) == ZONE_ID_UNDEFINED) {
5156 if (!bringup_failure_recovery)
5157 zerror(zlogp, B_TRUE, "unable to get zoneid");
5158 if (unmount_cmd)
5159 (void) lu_root_teardown(zlogp);
5160 goto error;
5161 }
5162
5163 if (remove_datalink_pool(zlogp, zoneid) != 0) {
5164 zerror(zlogp, B_FALSE, "unable clear datalink pool property");
5165 goto error;
5166 }
5167
5168 if (remove_datalink_protect(zlogp, zoneid) != 0) {
5169 zerror(zlogp, B_FALSE,
5170 "unable clear datalink protect property");
5171 goto error;
5172 }
5173
5174 /*
5175 * The datalinks assigned to the zone will be removed from the NGZ as
5176 * part of zone_shutdown() so that we need to remove protect/pool etc.
5177 * before zone_shutdown(). Even if the shutdown itself fails, the zone
5178 * will not be able to violate any constraints applied because the
5179 * datalinks are no longer available to the zone.
5180 */
5181 if (zone_shutdown(zoneid) != 0) {
5182 zerror(zlogp, B_TRUE, "unable to shutdown zone");
5183 goto error;
5184 }
5185
5186 /* Get the zonepath of this zone */
5187 if (zone_get_zonepath(zone_name, zpath, sizeof (zpath)) != Z_OK) {
5188 zerror(zlogp, B_FALSE, "unable to determine zone path");
5189 goto error;
5190 }
5191
5192 /* Get a handle to the brand info for this zone */
5193 if ((bh = brand_open(brand_name)) == NULL) {
5194 zerror(zlogp, B_FALSE, "unable to determine zone brand");
5195 return (-1);
5196 }
5197 /*
5198 * If there is a brand 'halt' callback, execute it now to give the
5199 * brand a chance to cleanup any custom configuration.
5200 */
5201 (void) strcpy(cmdbuf, EXEC_PREFIX);
5202 if (brand_get_halt(bh, zone_name, zpath, cmdbuf + EXEC_LEN,
5203 sizeof (cmdbuf) - EXEC_LEN) < 0) {
5204 brand_close(bh);
5205 zerror(zlogp, B_FALSE, "unable to determine branded zone's "
5206 "halt callback.");
5207 goto error;
5208 }
5209 brand_close(bh);
5210
5211 if ((strlen(cmdbuf) > EXEC_LEN) &&
5212 (do_subproc(zlogp, cmdbuf, NULL) != Z_OK)) {
5213 zerror(zlogp, B_FALSE, "%s failed", cmdbuf);
5214 goto error;
5215 }
5216
5217 if (!unmount_cmd) {
5218 zone_iptype_t iptype;
5219
5220 if (zone_getattr(zoneid, ZONE_ATTR_FLAGS, &flags,
5221 sizeof (flags)) < 0) {
5222 if (vplat_get_iptype(zlogp, &iptype) < 0) {
5223 zerror(zlogp, B_TRUE, "unable to determine "
5224 "ip-type");
5225 goto error;
5226 }
5227 } else {
5228 if (flags & ZF_NET_EXCL)
5229 iptype = ZS_EXCLUSIVE;
5230 else
5231 iptype = ZS_SHARED;
5232 }
5233
5234 switch (iptype) {
5235 case ZS_SHARED:
5236 if (unconfigure_shared_network_interfaces(zlogp,
5237 zoneid) != 0) {
5238 zerror(zlogp, B_FALSE, "unable to unconfigure "
5239 "network interfaces in zone");
5240 goto error;
5241 }
5242 break;
5243 case ZS_EXCLUSIVE:
5244 if (unconfigure_exclusive_network_interfaces(zlogp,
5245 zoneid) != 0) {
5246 zerror(zlogp, B_FALSE, "unable to unconfigure "
5247 "network interfaces in zone");
5248 goto error;
5249 }
5250 status = dladm_zone_halt(dld_handle, zoneid);
5251 if (status != DLADM_STATUS_OK) {
5252 zerror(zlogp, B_FALSE, "unable to notify "
5253 "dlmgmtd of zone halt: %s",
5254 dladm_status2str(status, errmsg));
5255 }
5256 break;
5257 }
5258 }
5259
5260 if (!unmount_cmd && tcp_abort_connections(zlogp, zoneid) != 0) {
5261 zerror(zlogp, B_TRUE, "unable to abort TCP connections");
5262 goto error;
5263 }
5264
5265 if (unmount_filesystems(zlogp, zoneid, unmount_cmd) != 0) {
5266 zerror(zlogp, B_FALSE,
5267 "unable to unmount file systems in zone");
5268 goto error;
5269 }
5270
5271 /*
5272 * If we are rebooting then we normally don't want to destroy an
5273 * existing temporary pool at this point so that we can just reuse it
5274 * when the zone boots back up. However, it is also possible we were
5275 * running with a temporary pool and the zone configuration has been
5276 * modified to no longer use a temporary pool. In that case we need
5277 * to destroy the temporary pool now. This case looks like the case
5278 * where we never had a temporary pool configured but
5279 * zonecfg_destroy_tmp_pool will do the right thing either way.
5280 */
5281 if (!unmount_cmd) {
5282 boolean_t destroy_tmp_pool = B_TRUE;
5283
5284 if (rebooting) {
5285 struct zone_psettab pset_tab;
5286 zone_dochandle_t handle;
5287
5288 if ((handle = zonecfg_init_handle()) != NULL &&
5289 zonecfg_get_handle(zone_name, handle) == Z_OK &&
5290 zonecfg_lookup_pset(handle, &pset_tab) == Z_OK)
5291 destroy_tmp_pool = B_FALSE;
5292
5293 zonecfg_fini_handle(handle);
5294 }
5295
5296 if (destroy_tmp_pool) {
5297 if ((res = zonecfg_destroy_tmp_pool(zone_name, pool_err,
5298 sizeof (pool_err))) != Z_OK) {
5299 if (res == Z_POOL)
5300 zerror(zlogp, B_FALSE, pool_err);
5301 }
5302 }
5303 }
5304
5305 remove_mlps(zlogp, zoneid);
5306
5307 if (zone_destroy(zoneid) != 0) {
5308 zerror(zlogp, B_TRUE, "unable to destroy zone");
5309 goto error;
5310 }
5311
5312 /*
5313 * Special teardown for alternate boot environments: remove the tmpfs
5314 * root for the zone and then remove it from the map file.
5315 */
5316 if (unmount_cmd && lu_root_teardown(zlogp) != 0)
5317 goto error;
5318
5319 lofs_discard_mnttab();
5320 return (0);
5321
5322 error:
5323 lofs_discard_mnttab();
5324 return (-1);
5325 }