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34dc7c2f BB |
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 | /* | |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
34dc7c2f BB |
24 | */ |
25 | ||
34dc7c2f BB |
26 | /* |
27 | * Routines to manage ZFS mounts. We separate all the nasty routines that have | |
28 | * to deal with the OS. The following functions are the main entry points -- | |
29 | * they are used by mount and unmount and when changing a filesystem's | |
30 | * mountpoint. | |
31 | * | |
32 | * zfs_is_mounted() | |
33 | * zfs_mount() | |
34 | * zfs_unmount() | |
35 | * zfs_unmountall() | |
36 | * | |
37 | * This file also contains the functions used to manage sharing filesystems via | |
38 | * NFS and iSCSI: | |
39 | * | |
40 | * zfs_is_shared() | |
41 | * zfs_share() | |
42 | * zfs_unshare() | |
43 | * | |
44 | * zfs_is_shared_nfs() | |
45 | * zfs_is_shared_smb() | |
34dc7c2f BB |
46 | * zfs_share_proto() |
47 | * zfs_shareall(); | |
34dc7c2f BB |
48 | * zfs_unshare_nfs() |
49 | * zfs_unshare_smb() | |
50 | * zfs_unshareall_nfs() | |
51 | * zfs_unshareall_smb() | |
52 | * zfs_unshareall() | |
53 | * zfs_unshareall_bypath() | |
34dc7c2f BB |
54 | * |
55 | * The following functions are available for pool consumers, and will | |
56 | * mount/unmount and share/unshare all datasets within pool: | |
57 | * | |
58 | * zpool_enable_datasets() | |
59 | * zpool_disable_datasets() | |
60 | */ | |
61 | ||
62 | #include <dirent.h> | |
63 | #include <dlfcn.h> | |
64 | #include <errno.h> | |
65 | #include <libgen.h> | |
66 | #include <libintl.h> | |
67 | #include <stdio.h> | |
68 | #include <stdlib.h> | |
69 | #include <strings.h> | |
70 | #include <unistd.h> | |
71 | #include <zone.h> | |
72 | #include <sys/mntent.h> | |
34dc7c2f BB |
73 | #include <sys/mount.h> |
74 | #include <sys/stat.h> | |
75 | ||
76 | #include <libzfs.h> | |
77 | ||
78 | #include "libzfs_impl.h" | |
79 | ||
80 | #include <libshare.h> | |
81 | #include <sys/systeminfo.h> | |
82 | #define MAXISALEN 257 /* based on sysinfo(2) man page */ | |
83 | ||
84 | static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); | |
85 | zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, | |
86 | zfs_share_proto_t); | |
87 | ||
34dc7c2f BB |
88 | /* |
89 | * The share protocols table must be in the same order as the zfs_share_prot_t | |
90 | * enum in libzfs_impl.h | |
91 | */ | |
92 | typedef struct { | |
93 | zfs_prop_t p_prop; | |
94 | char *p_name; | |
95 | int p_share_err; | |
96 | int p_unshare_err; | |
97 | } proto_table_t; | |
98 | ||
99 | proto_table_t proto_table[PROTO_END] = { | |
100 | {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, | |
101 | {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, | |
102 | }; | |
103 | ||
104 | zfs_share_proto_t nfs_only[] = { | |
105 | PROTO_NFS, | |
106 | PROTO_END | |
107 | }; | |
108 | ||
109 | zfs_share_proto_t smb_only[] = { | |
110 | PROTO_SMB, | |
111 | PROTO_END | |
112 | }; | |
113 | zfs_share_proto_t share_all_proto[] = { | |
114 | PROTO_NFS, | |
115 | PROTO_SMB, | |
116 | PROTO_END | |
117 | }; | |
118 | ||
34dc7c2f BB |
119 | /* |
120 | * Search the sharetab for the given mountpoint and protocol, returning | |
121 | * a zfs_share_type_t value. | |
122 | */ | |
123 | static zfs_share_type_t | |
124 | is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) | |
125 | { | |
126 | char buf[MAXPATHLEN], *tab; | |
127 | char *ptr; | |
128 | ||
129 | if (hdl->libzfs_sharetab == NULL) | |
130 | return (SHARED_NOT_SHARED); | |
131 | ||
132 | (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); | |
133 | ||
134 | while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { | |
135 | ||
136 | /* the mountpoint is the first entry on each line */ | |
137 | if ((tab = strchr(buf, '\t')) == NULL) | |
138 | continue; | |
139 | ||
140 | *tab = '\0'; | |
141 | if (strcmp(buf, mountpoint) == 0) { | |
142 | /* | |
143 | * the protocol field is the third field | |
144 | * skip over second field | |
145 | */ | |
146 | ptr = ++tab; | |
147 | if ((tab = strchr(ptr, '\t')) == NULL) | |
148 | continue; | |
149 | ptr = ++tab; | |
150 | if ((tab = strchr(ptr, '\t')) == NULL) | |
151 | continue; | |
152 | *tab = '\0'; | |
153 | if (strcmp(ptr, | |
154 | proto_table[proto].p_name) == 0) { | |
155 | switch (proto) { | |
156 | case PROTO_NFS: | |
157 | return (SHARED_NFS); | |
158 | case PROTO_SMB: | |
159 | return (SHARED_SMB); | |
160 | default: | |
161 | return (0); | |
162 | } | |
163 | } | |
164 | } | |
165 | } | |
166 | ||
167 | return (SHARED_NOT_SHARED); | |
168 | } | |
169 | ||
170 | /* | |
171 | * Returns true if the specified directory is empty. If we can't open the | |
172 | * directory at all, return true so that the mount can fail with a more | |
173 | * informative error message. | |
174 | */ | |
175 | static boolean_t | |
176 | dir_is_empty(const char *dirname) | |
177 | { | |
178 | DIR *dirp; | |
179 | struct dirent64 *dp; | |
180 | ||
181 | if ((dirp = opendir(dirname)) == NULL) | |
182 | return (B_TRUE); | |
183 | ||
184 | while ((dp = readdir64(dirp)) != NULL) { | |
185 | ||
186 | if (strcmp(dp->d_name, ".") == 0 || | |
187 | strcmp(dp->d_name, "..") == 0) | |
188 | continue; | |
189 | ||
190 | (void) closedir(dirp); | |
191 | return (B_FALSE); | |
192 | } | |
193 | ||
194 | (void) closedir(dirp); | |
195 | return (B_TRUE); | |
196 | } | |
197 | ||
198 | /* | |
199 | * Checks to see if the mount is active. If the filesystem is mounted, we fill | |
200 | * in 'where' with the current mountpoint, and return 1. Otherwise, we return | |
201 | * 0. | |
202 | */ | |
203 | boolean_t | |
204 | is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) | |
205 | { | |
fb5f0bc8 | 206 | struct mnttab entry; |
34dc7c2f | 207 | |
fb5f0bc8 | 208 | if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) |
34dc7c2f BB |
209 | return (B_FALSE); |
210 | ||
211 | if (where != NULL) | |
212 | *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); | |
213 | ||
214 | return (B_TRUE); | |
215 | } | |
216 | ||
217 | boolean_t | |
218 | zfs_is_mounted(zfs_handle_t *zhp, char **where) | |
219 | { | |
220 | return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Returns true if the given dataset is mountable, false otherwise. Returns the | |
225 | * mountpoint in 'buf'. | |
226 | */ | |
227 | static boolean_t | |
228 | zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, | |
229 | zprop_source_t *source) | |
230 | { | |
231 | char sourceloc[ZFS_MAXNAMELEN]; | |
232 | zprop_source_t sourcetype; | |
233 | ||
234 | if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) | |
235 | return (B_FALSE); | |
236 | ||
237 | verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, | |
238 | &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); | |
239 | ||
240 | if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || | |
241 | strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) | |
242 | return (B_FALSE); | |
243 | ||
244 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) | |
245 | return (B_FALSE); | |
246 | ||
247 | if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && | |
248 | getzoneid() == GLOBAL_ZONEID) | |
249 | return (B_FALSE); | |
250 | ||
251 | if (source) | |
252 | *source = sourcetype; | |
253 | ||
254 | return (B_TRUE); | |
255 | } | |
256 | ||
257 | /* | |
258 | * Mount the given filesystem. | |
259 | */ | |
260 | int | |
261 | zfs_mount(zfs_handle_t *zhp, const char *options, int flags) | |
262 | { | |
263 | struct stat buf; | |
264 | char mountpoint[ZFS_MAXPROPLEN]; | |
265 | char mntopts[MNT_LINE_MAX]; | |
266 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
267 | ||
268 | if (options == NULL) | |
269 | mntopts[0] = '\0'; | |
270 | else | |
271 | (void) strlcpy(mntopts, options, sizeof (mntopts)); | |
272 | ||
572e2857 BB |
273 | /* |
274 | * If the pool is imported read-only then all mounts must be read-only | |
275 | */ | |
276 | if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL)) | |
277 | flags |= MS_RDONLY; | |
278 | ||
34dc7c2f BB |
279 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) |
280 | return (0); | |
281 | ||
282 | /* Create the directory if it doesn't already exist */ | |
283 | if (lstat(mountpoint, &buf) != 0) { | |
284 | if (mkdirp(mountpoint, 0755) != 0) { | |
285 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
286 | "failed to create mountpoint")); | |
287 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
288 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
289 | mountpoint)); | |
290 | } | |
291 | } | |
292 | ||
293 | /* | |
294 | * Determine if the mountpoint is empty. If so, refuse to perform the | |
295 | * mount. We don't perform this check if MS_OVERLAY is specified, which | |
296 | * would defeat the point. We also avoid this check if 'remount' is | |
297 | * specified. | |
298 | */ | |
299 | if ((flags & MS_OVERLAY) == 0 && | |
300 | strstr(mntopts, MNTOPT_REMOUNT) == NULL && | |
301 | !dir_is_empty(mountpoint)) { | |
302 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
303 | "directory is not empty")); | |
304 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
305 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); | |
306 | } | |
307 | ||
308 | /* perform the mount */ | |
309 | if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, | |
310 | MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { | |
311 | /* | |
312 | * Generic errors are nasty, but there are just way too many | |
313 | * from mount(), and they're well-understood. We pick a few | |
314 | * common ones to improve upon. | |
315 | */ | |
316 | if (errno == EBUSY) { | |
317 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
318 | "mountpoint or dataset is busy")); | |
319 | } else if (errno == EPERM) { | |
320 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
321 | "Insufficient privileges")); | |
428870ff BB |
322 | } else if (errno == ENOTSUP) { |
323 | char buf[256]; | |
324 | int spa_version; | |
325 | ||
326 | VERIFY(zfs_spa_version(zhp, &spa_version) == 0); | |
327 | (void) snprintf(buf, sizeof (buf), | |
328 | dgettext(TEXT_DOMAIN, "Can't mount a version %lld " | |
329 | "file system on a version %d pool. Pool must be" | |
330 | " upgraded to mount this file system."), | |
331 | (u_longlong_t)zfs_prop_get_int(zhp, | |
332 | ZFS_PROP_VERSION), spa_version); | |
333 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); | |
34dc7c2f BB |
334 | } else { |
335 | zfs_error_aux(hdl, strerror(errno)); | |
336 | } | |
34dc7c2f BB |
337 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, |
338 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
339 | zhp->zfs_name)); | |
340 | } | |
341 | ||
fb5f0bc8 BB |
342 | /* add the mounted entry into our cache */ |
343 | libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, | |
344 | mntopts); | |
34dc7c2f BB |
345 | return (0); |
346 | } | |
347 | ||
348 | /* | |
349 | * Unmount a single filesystem. | |
350 | */ | |
351 | static int | |
352 | unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) | |
353 | { | |
354 | if (umount2(mountpoint, flags) != 0) { | |
355 | zfs_error_aux(hdl, strerror(errno)); | |
356 | return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, | |
357 | dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), | |
358 | mountpoint)); | |
359 | } | |
360 | ||
361 | return (0); | |
362 | } | |
363 | ||
364 | /* | |
365 | * Unmount the given filesystem. | |
366 | */ | |
367 | int | |
368 | zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) | |
369 | { | |
fb5f0bc8 BB |
370 | libzfs_handle_t *hdl = zhp->zfs_hdl; |
371 | struct mnttab entry; | |
34dc7c2f BB |
372 | char *mntpt = NULL; |
373 | ||
fb5f0bc8 | 374 | /* check to see if we need to unmount the filesystem */ |
34dc7c2f | 375 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && |
fb5f0bc8 | 376 | libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { |
34dc7c2f BB |
377 | /* |
378 | * mountpoint may have come from a call to | |
379 | * getmnt/getmntany if it isn't NULL. If it is NULL, | |
fb5f0bc8 BB |
380 | * we know it comes from libzfs_mnttab_find which can |
381 | * then get freed later. We strdup it to play it safe. | |
34dc7c2f BB |
382 | */ |
383 | if (mountpoint == NULL) | |
fb5f0bc8 | 384 | mntpt = zfs_strdup(hdl, entry.mnt_mountp); |
34dc7c2f | 385 | else |
fb5f0bc8 | 386 | mntpt = zfs_strdup(hdl, mountpoint); |
34dc7c2f BB |
387 | |
388 | /* | |
389 | * Unshare and unmount the filesystem | |
390 | */ | |
391 | if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) | |
392 | return (-1); | |
393 | ||
fb5f0bc8 | 394 | if (unmount_one(hdl, mntpt, flags) != 0) { |
34dc7c2f BB |
395 | free(mntpt); |
396 | (void) zfs_shareall(zhp); | |
397 | return (-1); | |
398 | } | |
fb5f0bc8 | 399 | libzfs_mnttab_remove(hdl, zhp->zfs_name); |
34dc7c2f BB |
400 | free(mntpt); |
401 | } | |
402 | ||
403 | return (0); | |
404 | } | |
405 | ||
406 | /* | |
407 | * Unmount this filesystem and any children inheriting the mountpoint property. | |
408 | * To do this, just act like we're changing the mountpoint property, but don't | |
409 | * remount the filesystems afterwards. | |
410 | */ | |
411 | int | |
412 | zfs_unmountall(zfs_handle_t *zhp, int flags) | |
413 | { | |
414 | prop_changelist_t *clp; | |
415 | int ret; | |
416 | ||
b128c09f | 417 | clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); |
34dc7c2f BB |
418 | if (clp == NULL) |
419 | return (-1); | |
420 | ||
421 | ret = changelist_prefix(clp); | |
422 | changelist_free(clp); | |
423 | ||
424 | return (ret); | |
425 | } | |
426 | ||
427 | boolean_t | |
428 | zfs_is_shared(zfs_handle_t *zhp) | |
429 | { | |
430 | zfs_share_type_t rc = 0; | |
431 | zfs_share_proto_t *curr_proto; | |
432 | ||
433 | if (ZFS_IS_VOLUME(zhp)) | |
428870ff | 434 | return (B_FALSE); |
34dc7c2f BB |
435 | |
436 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
437 | curr_proto++) | |
438 | rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); | |
439 | ||
440 | return (rc ? B_TRUE : B_FALSE); | |
441 | } | |
442 | ||
443 | int | |
444 | zfs_share(zfs_handle_t *zhp) | |
445 | { | |
572e2857 | 446 | assert(!ZFS_IS_VOLUME(zhp)); |
34dc7c2f BB |
447 | return (zfs_share_proto(zhp, share_all_proto)); |
448 | } | |
449 | ||
450 | int | |
451 | zfs_unshare(zfs_handle_t *zhp) | |
452 | { | |
572e2857 | 453 | assert(!ZFS_IS_VOLUME(zhp)); |
34dc7c2f BB |
454 | return (zfs_unshareall(zhp)); |
455 | } | |
456 | ||
457 | /* | |
458 | * Check to see if the filesystem is currently shared. | |
459 | */ | |
460 | zfs_share_type_t | |
461 | zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) | |
462 | { | |
463 | char *mountpoint; | |
464 | zfs_share_type_t rc; | |
465 | ||
466 | if (!zfs_is_mounted(zhp, &mountpoint)) | |
467 | return (SHARED_NOT_SHARED); | |
468 | ||
469 | if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) { | |
470 | if (where != NULL) | |
471 | *where = mountpoint; | |
472 | else | |
473 | free(mountpoint); | |
474 | return (rc); | |
475 | } else { | |
476 | free(mountpoint); | |
477 | return (SHARED_NOT_SHARED); | |
478 | } | |
479 | } | |
480 | ||
481 | boolean_t | |
482 | zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) | |
483 | { | |
484 | return (zfs_is_shared_proto(zhp, where, | |
485 | PROTO_NFS) != SHARED_NOT_SHARED); | |
486 | } | |
487 | ||
488 | boolean_t | |
489 | zfs_is_shared_smb(zfs_handle_t *zhp, char **where) | |
490 | { | |
491 | return (zfs_is_shared_proto(zhp, where, | |
492 | PROTO_SMB) != SHARED_NOT_SHARED); | |
493 | } | |
494 | ||
495 | /* | |
496 | * Make sure things will work if libshare isn't installed by using | |
497 | * wrapper functions that check to see that the pointers to functions | |
498 | * initialized in _zfs_init_libshare() are actually present. | |
499 | */ | |
500 | ||
501 | static sa_handle_t (*_sa_init)(int); | |
502 | static void (*_sa_fini)(sa_handle_t); | |
503 | static sa_share_t (*_sa_find_share)(sa_handle_t, char *); | |
504 | static int (*_sa_enable_share)(sa_share_t, char *); | |
505 | static int (*_sa_disable_share)(sa_share_t, char *); | |
506 | static char *(*_sa_errorstr)(int); | |
507 | static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); | |
508 | static boolean_t (*_sa_needs_refresh)(sa_handle_t *); | |
509 | static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); | |
510 | static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, | |
511 | char *, char *, zprop_source_t, char *, char *, char *); | |
512 | static void (*_sa_update_sharetab_ts)(sa_handle_t); | |
513 | ||
514 | /* | |
515 | * _zfs_init_libshare() | |
516 | * | |
517 | * Find the libshare.so.1 entry points that we use here and save the | |
518 | * values to be used later. This is triggered by the runtime loader. | |
519 | * Make sure the correct ISA version is loaded. | |
520 | */ | |
521 | ||
522 | #pragma init(_zfs_init_libshare) | |
523 | static void | |
524 | _zfs_init_libshare(void) | |
525 | { | |
526 | void *libshare; | |
527 | char path[MAXPATHLEN]; | |
528 | char isa[MAXISALEN]; | |
529 | ||
530 | #if defined(_LP64) | |
531 | if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) | |
532 | isa[0] = '\0'; | |
533 | #else | |
534 | isa[0] = '\0'; | |
535 | #endif | |
536 | (void) snprintf(path, MAXPATHLEN, | |
537 | "/usr/lib/%s/libshare.so.1", isa); | |
538 | ||
539 | if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { | |
540 | _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); | |
541 | _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); | |
542 | _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) | |
543 | dlsym(libshare, "sa_find_share"); | |
544 | _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, | |
545 | "sa_enable_share"); | |
546 | _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, | |
547 | "sa_disable_share"); | |
548 | _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); | |
549 | _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) | |
550 | dlsym(libshare, "sa_parse_legacy_options"); | |
551 | _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) | |
552 | dlsym(libshare, "sa_needs_refresh"); | |
553 | _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) | |
554 | dlsym(libshare, "sa_get_zfs_handle"); | |
555 | _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, | |
556 | sa_share_t, char *, char *, zprop_source_t, char *, | |
557 | char *, char *))dlsym(libshare, "sa_zfs_process_share"); | |
558 | _sa_update_sharetab_ts = (void (*)(sa_handle_t)) | |
559 | dlsym(libshare, "sa_update_sharetab_ts"); | |
560 | if (_sa_init == NULL || _sa_fini == NULL || | |
561 | _sa_find_share == NULL || _sa_enable_share == NULL || | |
562 | _sa_disable_share == NULL || _sa_errorstr == NULL || | |
563 | _sa_parse_legacy_options == NULL || | |
564 | _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || | |
565 | _sa_zfs_process_share == NULL || | |
566 | _sa_update_sharetab_ts == NULL) { | |
567 | _sa_init = NULL; | |
568 | _sa_fini = NULL; | |
569 | _sa_disable_share = NULL; | |
570 | _sa_enable_share = NULL; | |
571 | _sa_errorstr = NULL; | |
572 | _sa_parse_legacy_options = NULL; | |
573 | (void) dlclose(libshare); | |
574 | _sa_needs_refresh = NULL; | |
575 | _sa_get_zfs_handle = NULL; | |
576 | _sa_zfs_process_share = NULL; | |
577 | _sa_update_sharetab_ts = NULL; | |
578 | } | |
579 | } | |
580 | } | |
581 | ||
582 | /* | |
583 | * zfs_init_libshare(zhandle, service) | |
584 | * | |
585 | * Initialize the libshare API if it hasn't already been initialized. | |
586 | * In all cases it returns 0 if it succeeded and an error if not. The | |
587 | * service value is which part(s) of the API to initialize and is a | |
588 | * direct map to the libshare sa_init(service) interface. | |
589 | */ | |
590 | int | |
591 | zfs_init_libshare(libzfs_handle_t *zhandle, int service) | |
592 | { | |
593 | int ret = SA_OK; | |
594 | ||
595 | if (_sa_init == NULL) | |
596 | ret = SA_CONFIG_ERR; | |
597 | ||
598 | if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) { | |
599 | /* | |
600 | * We had a cache miss. Most likely it is a new ZFS | |
601 | * dataset that was just created. We want to make sure | |
602 | * so check timestamps to see if a different process | |
603 | * has updated any of the configuration. If there was | |
604 | * some non-ZFS change, we need to re-initialize the | |
605 | * internal cache. | |
606 | */ | |
607 | zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS; | |
608 | if (_sa_needs_refresh != NULL && | |
609 | _sa_needs_refresh(zhandle->libzfs_sharehdl)) { | |
610 | zfs_uninit_libshare(zhandle); | |
611 | zhandle->libzfs_sharehdl = _sa_init(service); | |
612 | } | |
613 | } | |
614 | ||
615 | if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) | |
616 | zhandle->libzfs_sharehdl = _sa_init(service); | |
617 | ||
618 | if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) | |
619 | ret = SA_NO_MEMORY; | |
620 | ||
621 | return (ret); | |
622 | } | |
623 | ||
624 | /* | |
625 | * zfs_uninit_libshare(zhandle) | |
626 | * | |
627 | * Uninitialize the libshare API if it hasn't already been | |
628 | * uninitialized. It is OK to call multiple times. | |
629 | */ | |
630 | void | |
631 | zfs_uninit_libshare(libzfs_handle_t *zhandle) | |
632 | { | |
633 | if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { | |
634 | if (_sa_fini != NULL) | |
635 | _sa_fini(zhandle->libzfs_sharehdl); | |
636 | zhandle->libzfs_sharehdl = NULL; | |
637 | } | |
638 | } | |
639 | ||
640 | /* | |
641 | * zfs_parse_options(options, proto) | |
642 | * | |
643 | * Call the legacy parse interface to get the protocol specific | |
644 | * options using the NULL arg to indicate that this is a "parse" only. | |
645 | */ | |
646 | int | |
647 | zfs_parse_options(char *options, zfs_share_proto_t proto) | |
648 | { | |
649 | if (_sa_parse_legacy_options != NULL) { | |
650 | return (_sa_parse_legacy_options(NULL, options, | |
651 | proto_table[proto].p_name)); | |
652 | } | |
653 | return (SA_CONFIG_ERR); | |
654 | } | |
655 | ||
656 | /* | |
657 | * zfs_sa_find_share(handle, path) | |
658 | * | |
659 | * wrapper around sa_find_share to find a share path in the | |
660 | * configuration. | |
661 | */ | |
662 | static sa_share_t | |
663 | zfs_sa_find_share(sa_handle_t handle, char *path) | |
664 | { | |
665 | if (_sa_find_share != NULL) | |
666 | return (_sa_find_share(handle, path)); | |
667 | return (NULL); | |
668 | } | |
669 | ||
670 | /* | |
671 | * zfs_sa_enable_share(share, proto) | |
672 | * | |
673 | * Wrapper for sa_enable_share which enables a share for a specified | |
674 | * protocol. | |
675 | */ | |
676 | static int | |
677 | zfs_sa_enable_share(sa_share_t share, char *proto) | |
678 | { | |
679 | if (_sa_enable_share != NULL) | |
680 | return (_sa_enable_share(share, proto)); | |
681 | return (SA_CONFIG_ERR); | |
682 | } | |
683 | ||
684 | /* | |
685 | * zfs_sa_disable_share(share, proto) | |
686 | * | |
687 | * Wrapper for sa_enable_share which disables a share for a specified | |
688 | * protocol. | |
689 | */ | |
690 | static int | |
691 | zfs_sa_disable_share(sa_share_t share, char *proto) | |
692 | { | |
693 | if (_sa_disable_share != NULL) | |
694 | return (_sa_disable_share(share, proto)); | |
695 | return (SA_CONFIG_ERR); | |
696 | } | |
697 | ||
698 | /* | |
699 | * Share the given filesystem according to the options in the specified | |
700 | * protocol specific properties (sharenfs, sharesmb). We rely | |
701 | * on "libshare" to the dirty work for us. | |
702 | */ | |
703 | static int | |
704 | zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
705 | { | |
706 | char mountpoint[ZFS_MAXPROPLEN]; | |
707 | char shareopts[ZFS_MAXPROPLEN]; | |
708 | char sourcestr[ZFS_MAXPROPLEN]; | |
709 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
710 | sa_share_t share; | |
711 | zfs_share_proto_t *curr_proto; | |
712 | zprop_source_t sourcetype; | |
713 | int ret; | |
714 | ||
715 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) | |
716 | return (0); | |
717 | ||
718 | if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
719 | (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
720 | dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), | |
721 | zfs_get_name(zhp), _sa_errorstr != NULL ? | |
722 | _sa_errorstr(ret) : ""); | |
723 | return (-1); | |
724 | } | |
725 | ||
726 | for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { | |
727 | /* | |
728 | * Return success if there are no share options. | |
729 | */ | |
730 | if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, | |
731 | shareopts, sizeof (shareopts), &sourcetype, sourcestr, | |
732 | ZFS_MAXPROPLEN, B_FALSE) != 0 || | |
733 | strcmp(shareopts, "off") == 0) | |
734 | continue; | |
735 | ||
736 | /* | |
737 | * If the 'zoned' property is set, then zfs_is_mountable() | |
738 | * will have already bailed out if we are in the global zone. | |
739 | * But local zones cannot be NFS servers, so we ignore it for | |
740 | * local zones as well. | |
741 | */ | |
742 | if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) | |
743 | continue; | |
744 | ||
745 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); | |
746 | if (share == NULL) { | |
747 | /* | |
748 | * This may be a new file system that was just | |
749 | * created so isn't in the internal cache | |
750 | * (second time through). Rather than | |
751 | * reloading the entire configuration, we can | |
752 | * assume ZFS has done the checking and it is | |
753 | * safe to add this to the internal | |
754 | * configuration. | |
755 | */ | |
756 | if (_sa_zfs_process_share(hdl->libzfs_sharehdl, | |
757 | NULL, NULL, mountpoint, | |
758 | proto_table[*curr_proto].p_name, sourcetype, | |
759 | shareopts, sourcestr, zhp->zfs_name) != SA_OK) { | |
760 | (void) zfs_error_fmt(hdl, | |
761 | proto_table[*curr_proto].p_share_err, | |
762 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
763 | zfs_get_name(zhp)); | |
764 | return (-1); | |
765 | } | |
766 | hdl->libzfs_shareflags |= ZFSSHARE_MISS; | |
767 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, | |
768 | mountpoint); | |
769 | } | |
770 | if (share != NULL) { | |
771 | int err; | |
772 | err = zfs_sa_enable_share(share, | |
773 | proto_table[*curr_proto].p_name); | |
774 | if (err != SA_OK) { | |
775 | (void) zfs_error_fmt(hdl, | |
776 | proto_table[*curr_proto].p_share_err, | |
777 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
778 | zfs_get_name(zhp)); | |
779 | return (-1); | |
780 | } | |
781 | } else { | |
782 | (void) zfs_error_fmt(hdl, | |
783 | proto_table[*curr_proto].p_share_err, | |
784 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
785 | zfs_get_name(zhp)); | |
786 | return (-1); | |
787 | } | |
788 | ||
789 | } | |
790 | return (0); | |
791 | } | |
792 | ||
793 | ||
794 | int | |
795 | zfs_share_nfs(zfs_handle_t *zhp) | |
796 | { | |
797 | return (zfs_share_proto(zhp, nfs_only)); | |
798 | } | |
799 | ||
800 | int | |
801 | zfs_share_smb(zfs_handle_t *zhp) | |
802 | { | |
803 | return (zfs_share_proto(zhp, smb_only)); | |
804 | } | |
805 | ||
806 | int | |
807 | zfs_shareall(zfs_handle_t *zhp) | |
808 | { | |
809 | return (zfs_share_proto(zhp, share_all_proto)); | |
810 | } | |
811 | ||
812 | /* | |
813 | * Unshare a filesystem by mountpoint. | |
814 | */ | |
815 | static int | |
816 | unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, | |
817 | zfs_share_proto_t proto) | |
818 | { | |
819 | sa_share_t share; | |
820 | int err; | |
821 | char *mntpt; | |
822 | /* | |
823 | * Mountpoint could get trashed if libshare calls getmntany | |
fb5f0bc8 | 824 | * which it does during API initialization, so strdup the |
34dc7c2f BB |
825 | * value. |
826 | */ | |
827 | mntpt = zfs_strdup(hdl, mountpoint); | |
828 | ||
829 | /* make sure libshare initialized */ | |
830 | if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
831 | free(mntpt); /* don't need the copy anymore */ | |
832 | return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
833 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
834 | name, _sa_errorstr(err))); | |
835 | } | |
836 | ||
837 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); | |
838 | free(mntpt); /* don't need the copy anymore */ | |
839 | ||
840 | if (share != NULL) { | |
841 | err = zfs_sa_disable_share(share, proto_table[proto].p_name); | |
842 | if (err != SA_OK) { | |
843 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
844 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
845 | name, _sa_errorstr(err))); | |
846 | } | |
847 | } else { | |
848 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
849 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), | |
850 | name)); | |
851 | } | |
852 | return (0); | |
853 | } | |
854 | ||
855 | /* | |
856 | * Unshare the given filesystem. | |
857 | */ | |
858 | int | |
859 | zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, | |
860 | zfs_share_proto_t *proto) | |
861 | { | |
fb5f0bc8 BB |
862 | libzfs_handle_t *hdl = zhp->zfs_hdl; |
863 | struct mnttab entry; | |
34dc7c2f BB |
864 | char *mntpt = NULL; |
865 | ||
866 | /* check to see if need to unmount the filesystem */ | |
34dc7c2f BB |
867 | rewind(zhp->zfs_hdl->libzfs_mnttab); |
868 | if (mountpoint != NULL) | |
fb5f0bc8 | 869 | mountpoint = mntpt = zfs_strdup(hdl, mountpoint); |
34dc7c2f BB |
870 | |
871 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && | |
fb5f0bc8 | 872 | libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { |
34dc7c2f BB |
873 | zfs_share_proto_t *curr_proto; |
874 | ||
875 | if (mountpoint == NULL) | |
876 | mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); | |
877 | ||
878 | for (curr_proto = proto; *curr_proto != PROTO_END; | |
879 | curr_proto++) { | |
880 | ||
fb5f0bc8 BB |
881 | if (is_shared(hdl, mntpt, *curr_proto) && |
882 | unshare_one(hdl, zhp->zfs_name, | |
34dc7c2f BB |
883 | mntpt, *curr_proto) != 0) { |
884 | if (mntpt != NULL) | |
885 | free(mntpt); | |
886 | return (-1); | |
887 | } | |
888 | } | |
889 | } | |
890 | if (mntpt != NULL) | |
891 | free(mntpt); | |
892 | ||
893 | return (0); | |
894 | } | |
895 | ||
896 | int | |
897 | zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) | |
898 | { | |
899 | return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); | |
900 | } | |
901 | ||
902 | int | |
903 | zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) | |
904 | { | |
905 | return (zfs_unshare_proto(zhp, mountpoint, smb_only)); | |
906 | } | |
907 | ||
908 | /* | |
909 | * Same as zfs_unmountall(), but for NFS and SMB unshares. | |
910 | */ | |
911 | int | |
912 | zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
913 | { | |
914 | prop_changelist_t *clp; | |
915 | int ret; | |
916 | ||
b128c09f | 917 | clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); |
34dc7c2f BB |
918 | if (clp == NULL) |
919 | return (-1); | |
920 | ||
921 | ret = changelist_unshare(clp, proto); | |
922 | changelist_free(clp); | |
923 | ||
924 | return (ret); | |
925 | } | |
926 | ||
927 | int | |
928 | zfs_unshareall_nfs(zfs_handle_t *zhp) | |
929 | { | |
930 | return (zfs_unshareall_proto(zhp, nfs_only)); | |
931 | } | |
932 | ||
933 | int | |
934 | zfs_unshareall_smb(zfs_handle_t *zhp) | |
935 | { | |
936 | return (zfs_unshareall_proto(zhp, smb_only)); | |
937 | } | |
938 | ||
939 | int | |
940 | zfs_unshareall(zfs_handle_t *zhp) | |
941 | { | |
942 | return (zfs_unshareall_proto(zhp, share_all_proto)); | |
943 | } | |
944 | ||
945 | int | |
946 | zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) | |
947 | { | |
948 | return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); | |
949 | } | |
950 | ||
951 | /* | |
952 | * Remove the mountpoint associated with the current dataset, if necessary. | |
953 | * We only remove the underlying directory if: | |
954 | * | |
955 | * - The mountpoint is not 'none' or 'legacy' | |
956 | * - The mountpoint is non-empty | |
957 | * - The mountpoint is the default or inherited | |
958 | * - The 'zoned' property is set, or we're in a local zone | |
959 | * | |
960 | * Any other directories we leave alone. | |
961 | */ | |
962 | void | |
963 | remove_mountpoint(zfs_handle_t *zhp) | |
964 | { | |
965 | char mountpoint[ZFS_MAXPROPLEN]; | |
966 | zprop_source_t source; | |
967 | ||
968 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), | |
969 | &source)) | |
970 | return; | |
971 | ||
972 | if (source == ZPROP_SRC_DEFAULT || | |
973 | source == ZPROP_SRC_INHERITED) { | |
974 | /* | |
975 | * Try to remove the directory, silently ignoring any errors. | |
976 | * The filesystem may have since been removed or moved around, | |
977 | * and this error isn't really useful to the administrator in | |
978 | * any way. | |
979 | */ | |
980 | (void) rmdir(mountpoint); | |
981 | } | |
982 | } | |
983 | ||
572e2857 BB |
984 | void |
985 | libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp) | |
986 | { | |
987 | if (cbp->cb_alloc == cbp->cb_used) { | |
988 | size_t newsz; | |
989 | void *ptr; | |
990 | ||
991 | newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64; | |
992 | ptr = zfs_realloc(zhp->zfs_hdl, | |
993 | cbp->cb_handles, cbp->cb_alloc * sizeof (void *), | |
994 | newsz * sizeof (void *)); | |
995 | cbp->cb_handles = ptr; | |
996 | cbp->cb_alloc = newsz; | |
997 | } | |
998 | cbp->cb_handles[cbp->cb_used++] = zhp; | |
999 | } | |
34dc7c2f BB |
1000 | |
1001 | static int | |
1002 | mount_cb(zfs_handle_t *zhp, void *data) | |
1003 | { | |
572e2857 | 1004 | get_all_cb_t *cbp = data; |
34dc7c2f | 1005 | |
572e2857 | 1006 | if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) { |
34dc7c2f BB |
1007 | zfs_close(zhp); |
1008 | return (0); | |
1009 | } | |
1010 | ||
1011 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { | |
1012 | zfs_close(zhp); | |
1013 | return (0); | |
1014 | } | |
1015 | ||
572e2857 BB |
1016 | libzfs_add_handle(cbp, zhp); |
1017 | if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) { | |
1018 | zfs_close(zhp); | |
1019 | return (-1); | |
34dc7c2f | 1020 | } |
572e2857 | 1021 | return (0); |
34dc7c2f BB |
1022 | } |
1023 | ||
572e2857 BB |
1024 | int |
1025 | libzfs_dataset_cmp(const void *a, const void *b) | |
34dc7c2f BB |
1026 | { |
1027 | zfs_handle_t **za = (zfs_handle_t **)a; | |
1028 | zfs_handle_t **zb = (zfs_handle_t **)b; | |
1029 | char mounta[MAXPATHLEN]; | |
1030 | char mountb[MAXPATHLEN]; | |
1031 | boolean_t gota, gotb; | |
1032 | ||
1033 | if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1034 | verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, | |
1035 | sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); | |
1036 | if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1037 | verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, | |
1038 | sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); | |
1039 | ||
1040 | if (gota && gotb) | |
1041 | return (strcmp(mounta, mountb)); | |
1042 | ||
1043 | if (gota) | |
1044 | return (-1); | |
1045 | if (gotb) | |
1046 | return (1); | |
1047 | ||
1048 | return (strcmp(zfs_get_name(a), zfs_get_name(b))); | |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * Mount and share all datasets within the given pool. This assumes that no | |
1053 | * datasets within the pool are currently mounted. Because users can create | |
1054 | * complicated nested hierarchies of mountpoints, we first gather all the | |
1055 | * datasets and mountpoints within the pool, and sort them by mountpoint. Once | |
1056 | * we have the list of all filesystems, we iterate over them in order and mount | |
1057 | * and/or share each one. | |
1058 | */ | |
1059 | #pragma weak zpool_mount_datasets = zpool_enable_datasets | |
1060 | int | |
1061 | zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) | |
1062 | { | |
572e2857 | 1063 | get_all_cb_t cb = { 0 }; |
34dc7c2f BB |
1064 | libzfs_handle_t *hdl = zhp->zpool_hdl; |
1065 | zfs_handle_t *zfsp; | |
1066 | int i, ret = -1; | |
1067 | int *good; | |
1068 | ||
1069 | /* | |
1070 | * Gather all non-snap datasets within the pool. | |
1071 | */ | |
34dc7c2f BB |
1072 | if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) |
1073 | goto out; | |
1074 | ||
572e2857 | 1075 | libzfs_add_handle(&cb, zfsp); |
34dc7c2f BB |
1076 | if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) |
1077 | goto out; | |
34dc7c2f BB |
1078 | /* |
1079 | * Sort the datasets by mountpoint. | |
1080 | */ | |
572e2857 BB |
1081 | qsort(cb.cb_handles, cb.cb_used, sizeof (void *), |
1082 | libzfs_dataset_cmp); | |
34dc7c2f BB |
1083 | |
1084 | /* | |
1085 | * And mount all the datasets, keeping track of which ones | |
d164b209 | 1086 | * succeeded or failed. |
34dc7c2f | 1087 | */ |
d164b209 BB |
1088 | if ((good = zfs_alloc(zhp->zpool_hdl, |
1089 | cb.cb_used * sizeof (int))) == NULL) | |
1090 | goto out; | |
1091 | ||
34dc7c2f BB |
1092 | ret = 0; |
1093 | for (i = 0; i < cb.cb_used; i++) { | |
572e2857 | 1094 | if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0) |
34dc7c2f BB |
1095 | ret = -1; |
1096 | else | |
1097 | good[i] = 1; | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Then share all the ones that need to be shared. This needs | |
1102 | * to be a separate pass in order to avoid excessive reloading | |
1103 | * of the configuration. Good should never be NULL since | |
1104 | * zfs_alloc is supposed to exit if memory isn't available. | |
1105 | */ | |
1106 | for (i = 0; i < cb.cb_used; i++) { | |
572e2857 | 1107 | if (good[i] && zfs_share(cb.cb_handles[i]) != 0) |
34dc7c2f BB |
1108 | ret = -1; |
1109 | } | |
1110 | ||
1111 | free(good); | |
1112 | ||
1113 | out: | |
1114 | for (i = 0; i < cb.cb_used; i++) | |
572e2857 BB |
1115 | zfs_close(cb.cb_handles[i]); |
1116 | free(cb.cb_handles); | |
34dc7c2f BB |
1117 | |
1118 | return (ret); | |
1119 | } | |
1120 | ||
34dc7c2f BB |
1121 | static int |
1122 | mountpoint_compare(const void *a, const void *b) | |
1123 | { | |
1124 | const char *mounta = *((char **)a); | |
1125 | const char *mountb = *((char **)b); | |
1126 | ||
1127 | return (strcmp(mountb, mounta)); | |
1128 | } | |
1129 | ||
428870ff BB |
1130 | /* alias for 2002/240 */ |
1131 | #pragma weak zpool_unmount_datasets = zpool_disable_datasets | |
34dc7c2f BB |
1132 | /* |
1133 | * Unshare and unmount all datasets within the given pool. We don't want to | |
1134 | * rely on traversing the DSL to discover the filesystems within the pool, | |
1135 | * because this may be expensive (if not all of them are mounted), and can fail | |
1136 | * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and | |
1137 | * gather all the filesystems that are currently mounted. | |
1138 | */ | |
34dc7c2f BB |
1139 | int |
1140 | zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) | |
1141 | { | |
1142 | int used, alloc; | |
1143 | struct mnttab entry; | |
1144 | size_t namelen; | |
1145 | char **mountpoints = NULL; | |
1146 | zfs_handle_t **datasets = NULL; | |
1147 | libzfs_handle_t *hdl = zhp->zpool_hdl; | |
1148 | int i; | |
1149 | int ret = -1; | |
1150 | int flags = (force ? MS_FORCE : 0); | |
1151 | ||
34dc7c2f BB |
1152 | namelen = strlen(zhp->zpool_name); |
1153 | ||
1154 | rewind(hdl->libzfs_mnttab); | |
1155 | used = alloc = 0; | |
1156 | while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { | |
1157 | /* | |
1158 | * Ignore non-ZFS entries. | |
1159 | */ | |
1160 | if (entry.mnt_fstype == NULL || | |
1161 | strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) | |
1162 | continue; | |
1163 | ||
1164 | /* | |
1165 | * Ignore filesystems not within this pool. | |
1166 | */ | |
1167 | if (entry.mnt_mountp == NULL || | |
1168 | strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || | |
1169 | (entry.mnt_special[namelen] != '/' && | |
1170 | entry.mnt_special[namelen] != '\0')) | |
1171 | continue; | |
1172 | ||
1173 | /* | |
1174 | * At this point we've found a filesystem within our pool. Add | |
1175 | * it to our growing list. | |
1176 | */ | |
1177 | if (used == alloc) { | |
1178 | if (alloc == 0) { | |
1179 | if ((mountpoints = zfs_alloc(hdl, | |
1180 | 8 * sizeof (void *))) == NULL) | |
1181 | goto out; | |
1182 | ||
1183 | if ((datasets = zfs_alloc(hdl, | |
1184 | 8 * sizeof (void *))) == NULL) | |
1185 | goto out; | |
1186 | ||
1187 | alloc = 8; | |
1188 | } else { | |
1189 | void *ptr; | |
1190 | ||
1191 | if ((ptr = zfs_realloc(hdl, mountpoints, | |
1192 | alloc * sizeof (void *), | |
1193 | alloc * 2 * sizeof (void *))) == NULL) | |
1194 | goto out; | |
1195 | mountpoints = ptr; | |
1196 | ||
1197 | if ((ptr = zfs_realloc(hdl, datasets, | |
1198 | alloc * sizeof (void *), | |
1199 | alloc * 2 * sizeof (void *))) == NULL) | |
1200 | goto out; | |
1201 | datasets = ptr; | |
1202 | ||
1203 | alloc *= 2; | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | if ((mountpoints[used] = zfs_strdup(hdl, | |
1208 | entry.mnt_mountp)) == NULL) | |
1209 | goto out; | |
1210 | ||
1211 | /* | |
1212 | * This is allowed to fail, in case there is some I/O error. It | |
1213 | * is only used to determine if we need to remove the underlying | |
1214 | * mountpoint, so failure is not fatal. | |
1215 | */ | |
1216 | datasets[used] = make_dataset_handle(hdl, entry.mnt_special); | |
1217 | ||
1218 | used++; | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * At this point, we have the entire list of filesystems, so sort it by | |
1223 | * mountpoint. | |
1224 | */ | |
1225 | qsort(mountpoints, used, sizeof (char *), mountpoint_compare); | |
1226 | ||
1227 | /* | |
1228 | * Walk through and first unshare everything. | |
1229 | */ | |
1230 | for (i = 0; i < used; i++) { | |
1231 | zfs_share_proto_t *curr_proto; | |
1232 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
1233 | curr_proto++) { | |
1234 | if (is_shared(hdl, mountpoints[i], *curr_proto) && | |
1235 | unshare_one(hdl, mountpoints[i], | |
1236 | mountpoints[i], *curr_proto) != 0) | |
1237 | goto out; | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Now unmount everything, removing the underlying directories as | |
1243 | * appropriate. | |
1244 | */ | |
1245 | for (i = 0; i < used; i++) { | |
1246 | if (unmount_one(hdl, mountpoints[i], flags) != 0) | |
1247 | goto out; | |
1248 | } | |
1249 | ||
1250 | for (i = 0; i < used; i++) { | |
1251 | if (datasets[i]) | |
1252 | remove_mountpoint(datasets[i]); | |
1253 | } | |
1254 | ||
1255 | ret = 0; | |
1256 | out: | |
1257 | for (i = 0; i < used; i++) { | |
1258 | if (datasets[i]) | |
1259 | zfs_close(datasets[i]); | |
1260 | free(mountpoints[i]); | |
1261 | } | |
1262 | free(datasets); | |
1263 | free(mountpoints); | |
1264 | ||
1265 | return (ret); | |
1266 | } |