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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 | 119 | /* |
46e18b3f | 120 | * Search the sharetab for the given mountpoint and protocol, returning |
34dc7c2f BB |
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; | |
46e18b3f | 127 | char *ptr; |
34dc7c2f BB |
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) { | |
46e18b3f GB |
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 | } | |
34dc7c2f BB |
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 | ||
3fb1fcde BB |
257 | /* |
258 | * The filesystem is mounted by invoking the system mount utility rather | |
259 | * than by the system call mount(2). This ensures that the /etc/mtab | |
260 | * file is correctly locked for the update. Performing our own locking | |
261 | * and /etc/mtab update requires making an unsafe assumption about how | |
262 | * the mount utility performs its locking. Unfortunately, this also means | |
263 | * in the case of a mount failure we do not have the exact errno. We must | |
264 | * make due with return value from the mount process. | |
265 | * | |
266 | * In the long term a shared library called libmount is under development | |
267 | * which provides a common API to address the locking and errno issues. | |
268 | * Once the standard mount utility has been updated to use this library | |
269 | * we can add an autoconf check to conditionally use it. | |
270 | * | |
271 | * http://www.kernel.org/pub/linux/utils/util-linux/libmount-docs/index.html | |
272 | */ | |
273 | ||
274 | static int | |
275 | do_mount(const char *src, const char *mntpt, char *opts) | |
276 | { | |
277 | char *argv[8] = { | |
278 | "/bin/mount", | |
279 | "-t", MNTTYPE_ZFS, | |
280 | "-o", opts, | |
281 | (char *)src, | |
282 | (char *)mntpt, | |
283 | (char *)NULL }; | |
284 | int rc; | |
285 | ||
286 | /* Return only the most critical mount error */ | |
9ac97c2a | 287 | rc = libzfs_run_process(argv[0], argv, STDOUT_VERBOSE|STDERR_VERBOSE); |
3fb1fcde BB |
288 | if (rc) { |
289 | if (rc & MOUNT_FILEIO) | |
290 | return EIO; | |
291 | if (rc & MOUNT_USER) | |
292 | return EINTR; | |
293 | if (rc & MOUNT_SOFTWARE) | |
294 | return EPIPE; | |
295 | if (rc & MOUNT_SYSERR) | |
296 | return EAGAIN; | |
297 | if (rc & MOUNT_USAGE) | |
298 | return EINVAL; | |
299 | ||
300 | return ENXIO; /* Generic error */ | |
301 | } | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | static int | |
307 | do_unmount(const char *mntpt, int flags) | |
308 | { | |
309 | char force_opt[] = "-f"; | |
310 | char lazy_opt[] = "-l"; | |
311 | char *argv[7] = { | |
312 | "/bin/umount", | |
313 | "-t", MNTTYPE_ZFS, | |
314 | NULL, NULL, NULL, NULL }; | |
315 | int rc, count = 3; | |
316 | ||
317 | if (flags & MS_FORCE) { | |
318 | argv[count] = force_opt; | |
319 | count++; | |
320 | } | |
321 | ||
322 | if (flags & MS_DETACH) { | |
323 | argv[count] = lazy_opt; | |
324 | count++; | |
325 | } | |
326 | ||
327 | argv[count] = (char *)mntpt; | |
9ac97c2a | 328 | rc = libzfs_run_process(argv[0], argv, STDOUT_VERBOSE|STDERR_VERBOSE); |
3fb1fcde BB |
329 | |
330 | return (rc ? EINVAL : 0); | |
331 | } | |
332 | ||
2cf7f52b BB |
333 | static int |
334 | zfs_add_option(zfs_handle_t *zhp, char *options, int len, | |
335 | zfs_prop_t prop, char *on, char *off) | |
336 | { | |
337 | char *source; | |
338 | uint64_t value; | |
339 | ||
340 | /* Skip adding duplicate default options */ | |
341 | if ((strstr(options, on) != NULL) || (strstr(options, off) != NULL)) | |
342 | return (0); | |
343 | ||
344 | /* | |
345 | * zfs_prop_get_int() to not used to ensure our mount options | |
346 | * are not influenced by the current /etc/mtab contents. | |
347 | */ | |
348 | value = getprop_uint64(zhp, prop, &source); | |
349 | ||
350 | (void) strlcat(options, ",", len); | |
351 | (void) strlcat(options, value ? on : off, len); | |
352 | ||
353 | return (0); | |
354 | } | |
355 | ||
356 | static int | |
357 | zfs_add_options(zfs_handle_t *zhp, char *options, int len) | |
358 | { | |
359 | int error = 0; | |
360 | ||
361 | error = zfs_add_option(zhp, options, len, | |
362 | ZFS_PROP_ATIME, MNTOPT_ATIME, MNTOPT_NOATIME); | |
363 | error = error ? error : zfs_add_option(zhp, options, len, | |
364 | ZFS_PROP_DEVICES, MNTOPT_DEVICES, MNTOPT_NODEVICES); | |
365 | error = error ? error : zfs_add_option(zhp, options, len, | |
366 | ZFS_PROP_EXEC, MNTOPT_EXEC, MNTOPT_NOEXEC); | |
367 | error = error ? error : zfs_add_option(zhp, options, len, | |
368 | ZFS_PROP_READONLY, MNTOPT_RO, MNTOPT_RW); | |
369 | error = error ? error : zfs_add_option(zhp, options, len, | |
370 | ZFS_PROP_SETUID, MNTOPT_SETUID, MNTOPT_NOSETUID); | |
371 | error = error ? error : zfs_add_option(zhp, options, len, | |
372 | ZFS_PROP_XATTR, MNTOPT_XATTR, MNTOPT_NOXATTR); | |
373 | error = error ? error : zfs_add_option(zhp, options, len, | |
374 | ZFS_PROP_NBMAND, MNTOPT_NBMAND, MNTOPT_NONBMAND); | |
375 | ||
376 | return (error); | |
377 | } | |
378 | ||
34dc7c2f BB |
379 | /* |
380 | * Mount the given filesystem. | |
381 | */ | |
382 | int | |
383 | zfs_mount(zfs_handle_t *zhp, const char *options, int flags) | |
384 | { | |
385 | struct stat buf; | |
386 | char mountpoint[ZFS_MAXPROPLEN]; | |
387 | char mntopts[MNT_LINE_MAX]; | |
388 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
2cf7f52b | 389 | int remount = 0, rc; |
34dc7c2f | 390 | |
2cf7f52b | 391 | if (options == NULL) { |
3fb1fcde | 392 | (void) strlcpy(mntopts, MNTOPT_DEFAULTS, sizeof (mntopts)); |
2cf7f52b | 393 | } else { |
34dc7c2f | 394 | (void) strlcpy(mntopts, options, sizeof (mntopts)); |
2cf7f52b BB |
395 | } |
396 | ||
397 | if (strstr(mntopts, MNTOPT_REMOUNT) != NULL) | |
398 | remount = 1; | |
34dc7c2f | 399 | |
572e2857 BB |
400 | /* |
401 | * If the pool is imported read-only then all mounts must be read-only | |
402 | */ | |
403 | if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL)) | |
3fb1fcde BB |
404 | (void) strlcat(mntopts, "," MNTOPT_RO, sizeof (mntopts)); |
405 | ||
2cf7f52b BB |
406 | /* |
407 | * Append default mount options which apply to the mount point. | |
408 | * This is done because under Linux (unlike Solaris) multiple mount | |
409 | * points may reference a single super block. This means that just | |
410 | * given a super block there is no back reference to update the per | |
411 | * mount point options. | |
412 | */ | |
413 | rc = zfs_add_options(zhp, mntopts, sizeof (mntopts)); | |
414 | if (rc) { | |
415 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
416 | "default options unavailable")); | |
417 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
418 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
419 | mountpoint)); | |
420 | } | |
421 | ||
3fb1fcde BB |
422 | /* |
423 | * Append zfsutil option so the mount helper allow the mount | |
424 | */ | |
425 | strlcat(mntopts, "," MNTOPT_ZFSUTIL, sizeof (mntopts)); | |
572e2857 | 426 | |
34dc7c2f BB |
427 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) |
428 | return (0); | |
429 | ||
430 | /* Create the directory if it doesn't already exist */ | |
431 | if (lstat(mountpoint, &buf) != 0) { | |
432 | if (mkdirp(mountpoint, 0755) != 0) { | |
433 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
434 | "failed to create mountpoint")); | |
435 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
436 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
437 | mountpoint)); | |
438 | } | |
439 | } | |
440 | ||
441 | /* | |
442 | * Determine if the mountpoint is empty. If so, refuse to perform the | |
e18be9a6 SC |
443 | * mount. We don't perform this check if 'remount' is |
444 | * specified or if overlay option(-O) is given | |
34dc7c2f | 445 | */ |
e18be9a6 SC |
446 | if ((flags & MS_OVERLAY) == 0 && !remount && |
447 | !dir_is_empty(mountpoint)) { | |
34dc7c2f BB |
448 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
449 | "directory is not empty")); | |
450 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
451 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); | |
452 | } | |
453 | ||
454 | /* perform the mount */ | |
3fb1fcde BB |
455 | rc = do_mount(zfs_get_name(zhp), mountpoint, mntopts); |
456 | if (rc) { | |
34dc7c2f BB |
457 | /* |
458 | * Generic errors are nasty, but there are just way too many | |
459 | * from mount(), and they're well-understood. We pick a few | |
460 | * common ones to improve upon. | |
461 | */ | |
3fb1fcde | 462 | if (rc == EBUSY) { |
34dc7c2f BB |
463 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
464 | "mountpoint or dataset is busy")); | |
3fb1fcde | 465 | } else if (rc == EPERM) { |
34dc7c2f BB |
466 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
467 | "Insufficient privileges")); | |
3fb1fcde | 468 | } else if (rc == ENOTSUP) { |
428870ff BB |
469 | char buf[256]; |
470 | int spa_version; | |
471 | ||
472 | VERIFY(zfs_spa_version(zhp, &spa_version) == 0); | |
473 | (void) snprintf(buf, sizeof (buf), | |
474 | dgettext(TEXT_DOMAIN, "Can't mount a version %lld " | |
475 | "file system on a version %d pool. Pool must be" | |
476 | " upgraded to mount this file system."), | |
477 | (u_longlong_t)zfs_prop_get_int(zhp, | |
478 | ZFS_PROP_VERSION), spa_version); | |
479 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); | |
34dc7c2f | 480 | } else { |
3fb1fcde | 481 | zfs_error_aux(hdl, strerror(rc)); |
34dc7c2f | 482 | } |
34dc7c2f BB |
483 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, |
484 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
485 | zhp->zfs_name)); | |
486 | } | |
487 | ||
2cf7f52b BB |
488 | /* remove the mounted entry before re-adding on remount */ |
489 | if (remount) | |
490 | libzfs_mnttab_remove(hdl, zhp->zfs_name); | |
491 | ||
fb5f0bc8 | 492 | /* add the mounted entry into our cache */ |
3fb1fcde | 493 | libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, mntopts); |
34dc7c2f BB |
494 | return (0); |
495 | } | |
496 | ||
497 | /* | |
498 | * Unmount a single filesystem. | |
499 | */ | |
500 | static int | |
501 | unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) | |
502 | { | |
9ac97c2a BB |
503 | int error; |
504 | ||
505 | error = do_unmount(mountpoint, flags); | |
506 | if (error != 0) { | |
34dc7c2f BB |
507 | return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, |
508 | dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), | |
509 | mountpoint)); | |
510 | } | |
511 | ||
512 | return (0); | |
513 | } | |
514 | ||
515 | /* | |
516 | * Unmount the given filesystem. | |
517 | */ | |
518 | int | |
519 | zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) | |
520 | { | |
fb5f0bc8 BB |
521 | libzfs_handle_t *hdl = zhp->zfs_hdl; |
522 | struct mnttab entry; | |
34dc7c2f BB |
523 | char *mntpt = NULL; |
524 | ||
fb5f0bc8 | 525 | /* check to see if we need to unmount the filesystem */ |
34dc7c2f | 526 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && |
fb5f0bc8 | 527 | libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { |
34dc7c2f BB |
528 | /* |
529 | * mountpoint may have come from a call to | |
530 | * getmnt/getmntany if it isn't NULL. If it is NULL, | |
fb5f0bc8 BB |
531 | * we know it comes from libzfs_mnttab_find which can |
532 | * then get freed later. We strdup it to play it safe. | |
34dc7c2f BB |
533 | */ |
534 | if (mountpoint == NULL) | |
fb5f0bc8 | 535 | mntpt = zfs_strdup(hdl, entry.mnt_mountp); |
34dc7c2f | 536 | else |
fb5f0bc8 | 537 | mntpt = zfs_strdup(hdl, mountpoint); |
34dc7c2f BB |
538 | |
539 | /* | |
540 | * Unshare and unmount the filesystem | |
541 | */ | |
542 | if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) | |
543 | return (-1); | |
544 | ||
fb5f0bc8 | 545 | if (unmount_one(hdl, mntpt, flags) != 0) { |
34dc7c2f BB |
546 | free(mntpt); |
547 | (void) zfs_shareall(zhp); | |
548 | return (-1); | |
549 | } | |
fb5f0bc8 | 550 | libzfs_mnttab_remove(hdl, zhp->zfs_name); |
34dc7c2f BB |
551 | free(mntpt); |
552 | } | |
553 | ||
554 | return (0); | |
555 | } | |
556 | ||
557 | /* | |
558 | * Unmount this filesystem and any children inheriting the mountpoint property. | |
559 | * To do this, just act like we're changing the mountpoint property, but don't | |
560 | * remount the filesystems afterwards. | |
561 | */ | |
562 | int | |
563 | zfs_unmountall(zfs_handle_t *zhp, int flags) | |
564 | { | |
565 | prop_changelist_t *clp; | |
566 | int ret; | |
567 | ||
b128c09f | 568 | clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); |
34dc7c2f BB |
569 | if (clp == NULL) |
570 | return (-1); | |
571 | ||
572 | ret = changelist_prefix(clp); | |
573 | changelist_free(clp); | |
574 | ||
575 | return (ret); | |
576 | } | |
577 | ||
578 | boolean_t | |
579 | zfs_is_shared(zfs_handle_t *zhp) | |
580 | { | |
581 | zfs_share_type_t rc = 0; | |
582 | zfs_share_proto_t *curr_proto; | |
583 | ||
584 | if (ZFS_IS_VOLUME(zhp)) | |
428870ff | 585 | return (B_FALSE); |
34dc7c2f BB |
586 | |
587 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
588 | curr_proto++) | |
589 | rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); | |
590 | ||
591 | return (rc ? B_TRUE : B_FALSE); | |
592 | } | |
593 | ||
594 | int | |
595 | zfs_share(zfs_handle_t *zhp) | |
596 | { | |
572e2857 | 597 | assert(!ZFS_IS_VOLUME(zhp)); |
34dc7c2f BB |
598 | return (zfs_share_proto(zhp, share_all_proto)); |
599 | } | |
600 | ||
601 | int | |
602 | zfs_unshare(zfs_handle_t *zhp) | |
603 | { | |
572e2857 | 604 | assert(!ZFS_IS_VOLUME(zhp)); |
34dc7c2f BB |
605 | return (zfs_unshareall(zhp)); |
606 | } | |
607 | ||
608 | /* | |
609 | * Check to see if the filesystem is currently shared. | |
610 | */ | |
611 | zfs_share_type_t | |
612 | zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) | |
613 | { | |
614 | char *mountpoint; | |
615 | zfs_share_type_t rc; | |
616 | ||
617 | if (!zfs_is_mounted(zhp, &mountpoint)) | |
618 | return (SHARED_NOT_SHARED); | |
619 | ||
149e873a | 620 | if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto))) { |
34dc7c2f BB |
621 | if (where != NULL) |
622 | *where = mountpoint; | |
623 | else | |
624 | free(mountpoint); | |
625 | return (rc); | |
626 | } else { | |
627 | free(mountpoint); | |
628 | return (SHARED_NOT_SHARED); | |
629 | } | |
630 | } | |
631 | ||
632 | boolean_t | |
633 | zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) | |
634 | { | |
635 | return (zfs_is_shared_proto(zhp, where, | |
636 | PROTO_NFS) != SHARED_NOT_SHARED); | |
637 | } | |
638 | ||
639 | boolean_t | |
640 | zfs_is_shared_smb(zfs_handle_t *zhp, char **where) | |
641 | { | |
642 | return (zfs_is_shared_proto(zhp, where, | |
643 | PROTO_SMB) != SHARED_NOT_SHARED); | |
644 | } | |
645 | ||
34dc7c2f BB |
646 | /* |
647 | * zfs_init_libshare(zhandle, service) | |
648 | * | |
649 | * Initialize the libshare API if it hasn't already been initialized. | |
650 | * In all cases it returns 0 if it succeeded and an error if not. The | |
651 | * service value is which part(s) of the API to initialize and is a | |
652 | * direct map to the libshare sa_init(service) interface. | |
653 | */ | |
654 | int | |
655 | zfs_init_libshare(libzfs_handle_t *zhandle, int service) | |
656 | { | |
657 | int ret = SA_OK; | |
658 | ||
34dc7c2f BB |
659 | if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) { |
660 | /* | |
661 | * We had a cache miss. Most likely it is a new ZFS | |
662 | * dataset that was just created. We want to make sure | |
663 | * so check timestamps to see if a different process | |
664 | * has updated any of the configuration. If there was | |
665 | * some non-ZFS change, we need to re-initialize the | |
666 | * internal cache. | |
667 | */ | |
668 | zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS; | |
52e7c3a2 | 669 | if (sa_needs_refresh(zhandle->libzfs_sharehdl)) { |
34dc7c2f | 670 | zfs_uninit_libshare(zhandle); |
52e7c3a2 | 671 | zhandle->libzfs_sharehdl = sa_init(service); |
34dc7c2f BB |
672 | } |
673 | } | |
674 | ||
675 | if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) | |
52e7c3a2 | 676 | zhandle->libzfs_sharehdl = sa_init(service); |
34dc7c2f BB |
677 | |
678 | if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) | |
679 | ret = SA_NO_MEMORY; | |
680 | ||
681 | return (ret); | |
682 | } | |
683 | ||
684 | /* | |
685 | * zfs_uninit_libshare(zhandle) | |
686 | * | |
687 | * Uninitialize the libshare API if it hasn't already been | |
688 | * uninitialized. It is OK to call multiple times. | |
689 | */ | |
690 | void | |
691 | zfs_uninit_libshare(libzfs_handle_t *zhandle) | |
692 | { | |
693 | if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { | |
52e7c3a2 | 694 | sa_fini(zhandle->libzfs_sharehdl); |
34dc7c2f BB |
695 | zhandle->libzfs_sharehdl = NULL; |
696 | } | |
697 | } | |
698 | ||
699 | /* | |
700 | * zfs_parse_options(options, proto) | |
701 | * | |
702 | * Call the legacy parse interface to get the protocol specific | |
703 | * options using the NULL arg to indicate that this is a "parse" only. | |
704 | */ | |
705 | int | |
706 | zfs_parse_options(char *options, zfs_share_proto_t proto) | |
707 | { | |
52e7c3a2 GB |
708 | return (sa_parse_legacy_options(NULL, options, |
709 | proto_table[proto].p_name)); | |
34dc7c2f BB |
710 | } |
711 | ||
712 | /* | |
713 | * Share the given filesystem according to the options in the specified | |
714 | * protocol specific properties (sharenfs, sharesmb). We rely | |
645fb9cc | 715 | * on "libshare" to do the dirty work for us. |
34dc7c2f BB |
716 | */ |
717 | static int | |
718 | zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
719 | { | |
720 | char mountpoint[ZFS_MAXPROPLEN]; | |
721 | char shareopts[ZFS_MAXPROPLEN]; | |
722 | char sourcestr[ZFS_MAXPROPLEN]; | |
723 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
724 | sa_share_t share; | |
725 | zfs_share_proto_t *curr_proto; | |
726 | zprop_source_t sourcetype; | |
727 | int ret; | |
728 | ||
729 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) | |
730 | return (0); | |
731 | ||
732 | if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
733 | (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
734 | dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), | |
52e7c3a2 | 735 | zfs_get_name(zhp), sa_errorstr(ret)); |
34dc7c2f BB |
736 | return (-1); |
737 | } | |
738 | ||
739 | for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { | |
740 | /* | |
741 | * Return success if there are no share options. | |
742 | */ | |
743 | if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, | |
744 | shareopts, sizeof (shareopts), &sourcetype, sourcestr, | |
745 | ZFS_MAXPROPLEN, B_FALSE) != 0 || | |
746 | strcmp(shareopts, "off") == 0) | |
747 | continue; | |
748 | ||
749 | /* | |
750 | * If the 'zoned' property is set, then zfs_is_mountable() | |
751 | * will have already bailed out if we are in the global zone. | |
752 | * But local zones cannot be NFS servers, so we ignore it for | |
753 | * local zones as well. | |
754 | */ | |
755 | if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) | |
756 | continue; | |
757 | ||
52e7c3a2 | 758 | share = sa_find_share(hdl->libzfs_sharehdl, mountpoint); |
34dc7c2f BB |
759 | if (share == NULL) { |
760 | /* | |
761 | * This may be a new file system that was just | |
762 | * created so isn't in the internal cache | |
763 | * (second time through). Rather than | |
764 | * reloading the entire configuration, we can | |
765 | * assume ZFS has done the checking and it is | |
766 | * safe to add this to the internal | |
767 | * configuration. | |
768 | */ | |
52e7c3a2 | 769 | if (sa_zfs_process_share(hdl->libzfs_sharehdl, |
34dc7c2f BB |
770 | NULL, NULL, mountpoint, |
771 | proto_table[*curr_proto].p_name, sourcetype, | |
772 | shareopts, sourcestr, zhp->zfs_name) != SA_OK) { | |
773 | (void) zfs_error_fmt(hdl, | |
774 | proto_table[*curr_proto].p_share_err, | |
775 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
776 | zfs_get_name(zhp)); | |
777 | return (-1); | |
778 | } | |
779 | hdl->libzfs_shareflags |= ZFSSHARE_MISS; | |
52e7c3a2 | 780 | share = sa_find_share(hdl->libzfs_sharehdl, |
34dc7c2f BB |
781 | mountpoint); |
782 | } | |
783 | if (share != NULL) { | |
784 | int err; | |
52e7c3a2 | 785 | err = sa_enable_share(share, |
34dc7c2f BB |
786 | proto_table[*curr_proto].p_name); |
787 | if (err != SA_OK) { | |
788 | (void) zfs_error_fmt(hdl, | |
789 | proto_table[*curr_proto].p_share_err, | |
790 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
791 | zfs_get_name(zhp)); | |
792 | return (-1); | |
793 | } | |
794 | } else { | |
795 | (void) zfs_error_fmt(hdl, | |
796 | proto_table[*curr_proto].p_share_err, | |
797 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
798 | zfs_get_name(zhp)); | |
799 | return (-1); | |
800 | } | |
801 | ||
802 | } | |
803 | return (0); | |
804 | } | |
805 | ||
806 | ||
807 | int | |
808 | zfs_share_nfs(zfs_handle_t *zhp) | |
809 | { | |
810 | return (zfs_share_proto(zhp, nfs_only)); | |
811 | } | |
812 | ||
813 | int | |
814 | zfs_share_smb(zfs_handle_t *zhp) | |
815 | { | |
816 | return (zfs_share_proto(zhp, smb_only)); | |
817 | } | |
818 | ||
819 | int | |
820 | zfs_shareall(zfs_handle_t *zhp) | |
821 | { | |
822 | return (zfs_share_proto(zhp, share_all_proto)); | |
823 | } | |
824 | ||
825 | /* | |
826 | * Unshare a filesystem by mountpoint. | |
827 | */ | |
828 | static int | |
829 | unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, | |
830 | zfs_share_proto_t proto) | |
831 | { | |
832 | sa_share_t share; | |
833 | int err; | |
834 | char *mntpt; | |
835 | /* | |
836 | * Mountpoint could get trashed if libshare calls getmntany | |
fb5f0bc8 | 837 | * which it does during API initialization, so strdup the |
34dc7c2f BB |
838 | * value. |
839 | */ | |
840 | mntpt = zfs_strdup(hdl, mountpoint); | |
841 | ||
842 | /* make sure libshare initialized */ | |
843 | if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
844 | free(mntpt); /* don't need the copy anymore */ | |
845 | return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
846 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
52e7c3a2 | 847 | name, sa_errorstr(err))); |
34dc7c2f BB |
848 | } |
849 | ||
52e7c3a2 | 850 | share = sa_find_share(hdl->libzfs_sharehdl, mntpt); |
34dc7c2f BB |
851 | free(mntpt); /* don't need the copy anymore */ |
852 | ||
853 | if (share != NULL) { | |
52e7c3a2 | 854 | err = sa_disable_share(share, proto_table[proto].p_name); |
34dc7c2f BB |
855 | if (err != SA_OK) { |
856 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
857 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
52e7c3a2 | 858 | name, sa_errorstr(err))); |
34dc7c2f BB |
859 | } |
860 | } else { | |
861 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
862 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), | |
863 | name)); | |
864 | } | |
865 | return (0); | |
866 | } | |
867 | ||
868 | /* | |
869 | * Unshare the given filesystem. | |
870 | */ | |
871 | int | |
872 | zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, | |
873 | zfs_share_proto_t *proto) | |
874 | { | |
fb5f0bc8 BB |
875 | libzfs_handle_t *hdl = zhp->zfs_hdl; |
876 | struct mnttab entry; | |
34dc7c2f BB |
877 | char *mntpt = NULL; |
878 | ||
879 | /* check to see if need to unmount the filesystem */ | |
34dc7c2f BB |
880 | rewind(zhp->zfs_hdl->libzfs_mnttab); |
881 | if (mountpoint != NULL) | |
fb5f0bc8 | 882 | mountpoint = mntpt = zfs_strdup(hdl, mountpoint); |
34dc7c2f BB |
883 | |
884 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && | |
fb5f0bc8 | 885 | libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { |
34dc7c2f BB |
886 | zfs_share_proto_t *curr_proto; |
887 | ||
888 | if (mountpoint == NULL) | |
889 | mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); | |
890 | ||
891 | for (curr_proto = proto; *curr_proto != PROTO_END; | |
645fb9cc | 892 | curr_proto++) { |
34dc7c2f | 893 | |
fb5f0bc8 BB |
894 | if (is_shared(hdl, mntpt, *curr_proto) && |
895 | unshare_one(hdl, zhp->zfs_name, | |
645fb9cc | 896 | mntpt, *curr_proto) != 0) { |
34dc7c2f BB |
897 | if (mntpt != NULL) |
898 | free(mntpt); | |
899 | return (-1); | |
900 | } | |
901 | } | |
902 | } | |
903 | if (mntpt != NULL) | |
904 | free(mntpt); | |
905 | ||
906 | return (0); | |
907 | } | |
908 | ||
909 | int | |
910 | zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) | |
911 | { | |
912 | return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); | |
913 | } | |
914 | ||
915 | int | |
916 | zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) | |
917 | { | |
918 | return (zfs_unshare_proto(zhp, mountpoint, smb_only)); | |
919 | } | |
920 | ||
921 | /* | |
922 | * Same as zfs_unmountall(), but for NFS and SMB unshares. | |
923 | */ | |
924 | int | |
925 | zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
926 | { | |
927 | prop_changelist_t *clp; | |
928 | int ret; | |
929 | ||
b128c09f | 930 | clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); |
34dc7c2f BB |
931 | if (clp == NULL) |
932 | return (-1); | |
933 | ||
934 | ret = changelist_unshare(clp, proto); | |
935 | changelist_free(clp); | |
936 | ||
937 | return (ret); | |
938 | } | |
939 | ||
940 | int | |
941 | zfs_unshareall_nfs(zfs_handle_t *zhp) | |
942 | { | |
943 | return (zfs_unshareall_proto(zhp, nfs_only)); | |
944 | } | |
945 | ||
946 | int | |
947 | zfs_unshareall_smb(zfs_handle_t *zhp) | |
948 | { | |
949 | return (zfs_unshareall_proto(zhp, smb_only)); | |
950 | } | |
951 | ||
952 | int | |
953 | zfs_unshareall(zfs_handle_t *zhp) | |
954 | { | |
955 | return (zfs_unshareall_proto(zhp, share_all_proto)); | |
956 | } | |
957 | ||
958 | int | |
959 | zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) | |
960 | { | |
961 | return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); | |
962 | } | |
963 | ||
964 | /* | |
965 | * Remove the mountpoint associated with the current dataset, if necessary. | |
966 | * We only remove the underlying directory if: | |
967 | * | |
968 | * - The mountpoint is not 'none' or 'legacy' | |
969 | * - The mountpoint is non-empty | |
970 | * - The mountpoint is the default or inherited | |
971 | * - The 'zoned' property is set, or we're in a local zone | |
972 | * | |
973 | * Any other directories we leave alone. | |
974 | */ | |
975 | void | |
976 | remove_mountpoint(zfs_handle_t *zhp) | |
977 | { | |
978 | char mountpoint[ZFS_MAXPROPLEN]; | |
979 | zprop_source_t source; | |
980 | ||
981 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), | |
982 | &source)) | |
983 | return; | |
984 | ||
985 | if (source == ZPROP_SRC_DEFAULT || | |
986 | source == ZPROP_SRC_INHERITED) { | |
987 | /* | |
988 | * Try to remove the directory, silently ignoring any errors. | |
989 | * The filesystem may have since been removed or moved around, | |
990 | * and this error isn't really useful to the administrator in | |
991 | * any way. | |
992 | */ | |
993 | (void) rmdir(mountpoint); | |
994 | } | |
995 | } | |
996 | ||
572e2857 BB |
997 | void |
998 | libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp) | |
999 | { | |
1000 | if (cbp->cb_alloc == cbp->cb_used) { | |
1001 | size_t newsz; | |
1002 | void *ptr; | |
1003 | ||
1004 | newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64; | |
1005 | ptr = zfs_realloc(zhp->zfs_hdl, | |
1006 | cbp->cb_handles, cbp->cb_alloc * sizeof (void *), | |
1007 | newsz * sizeof (void *)); | |
1008 | cbp->cb_handles = ptr; | |
1009 | cbp->cb_alloc = newsz; | |
1010 | } | |
1011 | cbp->cb_handles[cbp->cb_used++] = zhp; | |
1012 | } | |
34dc7c2f BB |
1013 | |
1014 | static int | |
1015 | mount_cb(zfs_handle_t *zhp, void *data) | |
1016 | { | |
572e2857 | 1017 | get_all_cb_t *cbp = data; |
34dc7c2f | 1018 | |
572e2857 | 1019 | if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) { |
34dc7c2f BB |
1020 | zfs_close(zhp); |
1021 | return (0); | |
1022 | } | |
1023 | ||
1024 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { | |
1025 | zfs_close(zhp); | |
1026 | return (0); | |
1027 | } | |
1028 | ||
572e2857 BB |
1029 | libzfs_add_handle(cbp, zhp); |
1030 | if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) { | |
1031 | zfs_close(zhp); | |
1032 | return (-1); | |
34dc7c2f | 1033 | } |
572e2857 | 1034 | return (0); |
34dc7c2f BB |
1035 | } |
1036 | ||
572e2857 BB |
1037 | int |
1038 | libzfs_dataset_cmp(const void *a, const void *b) | |
34dc7c2f BB |
1039 | { |
1040 | zfs_handle_t **za = (zfs_handle_t **)a; | |
1041 | zfs_handle_t **zb = (zfs_handle_t **)b; | |
1042 | char mounta[MAXPATHLEN]; | |
1043 | char mountb[MAXPATHLEN]; | |
1044 | boolean_t gota, gotb; | |
1045 | ||
1046 | if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1047 | verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, | |
1048 | sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); | |
1049 | if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1050 | verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, | |
1051 | sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); | |
1052 | ||
1053 | if (gota && gotb) | |
1054 | return (strcmp(mounta, mountb)); | |
1055 | ||
1056 | if (gota) | |
1057 | return (-1); | |
1058 | if (gotb) | |
1059 | return (1); | |
1060 | ||
1061 | return (strcmp(zfs_get_name(a), zfs_get_name(b))); | |
1062 | } | |
1063 | ||
1064 | /* | |
1065 | * Mount and share all datasets within the given pool. This assumes that no | |
1066 | * datasets within the pool are currently mounted. Because users can create | |
1067 | * complicated nested hierarchies of mountpoints, we first gather all the | |
1068 | * datasets and mountpoints within the pool, and sort them by mountpoint. Once | |
1069 | * we have the list of all filesystems, we iterate over them in order and mount | |
1070 | * and/or share each one. | |
1071 | */ | |
1072 | #pragma weak zpool_mount_datasets = zpool_enable_datasets | |
1073 | int | |
1074 | zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) | |
1075 | { | |
572e2857 | 1076 | get_all_cb_t cb = { 0 }; |
34dc7c2f BB |
1077 | libzfs_handle_t *hdl = zhp->zpool_hdl; |
1078 | zfs_handle_t *zfsp; | |
1079 | int i, ret = -1; | |
1080 | int *good; | |
1081 | ||
1082 | /* | |
1083 | * Gather all non-snap datasets within the pool. | |
1084 | */ | |
34dc7c2f BB |
1085 | if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) |
1086 | goto out; | |
1087 | ||
572e2857 | 1088 | libzfs_add_handle(&cb, zfsp); |
34dc7c2f BB |
1089 | if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) |
1090 | goto out; | |
34dc7c2f BB |
1091 | /* |
1092 | * Sort the datasets by mountpoint. | |
1093 | */ | |
572e2857 BB |
1094 | qsort(cb.cb_handles, cb.cb_used, sizeof (void *), |
1095 | libzfs_dataset_cmp); | |
34dc7c2f BB |
1096 | |
1097 | /* | |
1098 | * And mount all the datasets, keeping track of which ones | |
d164b209 | 1099 | * succeeded or failed. |
34dc7c2f | 1100 | */ |
d164b209 BB |
1101 | if ((good = zfs_alloc(zhp->zpool_hdl, |
1102 | cb.cb_used * sizeof (int))) == NULL) | |
1103 | goto out; | |
1104 | ||
34dc7c2f BB |
1105 | ret = 0; |
1106 | for (i = 0; i < cb.cb_used; i++) { | |
572e2857 | 1107 | if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0) |
34dc7c2f BB |
1108 | ret = -1; |
1109 | else | |
1110 | good[i] = 1; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Then share all the ones that need to be shared. This needs | |
1115 | * to be a separate pass in order to avoid excessive reloading | |
1116 | * of the configuration. Good should never be NULL since | |
1117 | * zfs_alloc is supposed to exit if memory isn't available. | |
1118 | */ | |
1119 | for (i = 0; i < cb.cb_used; i++) { | |
572e2857 | 1120 | if (good[i] && zfs_share(cb.cb_handles[i]) != 0) |
34dc7c2f BB |
1121 | ret = -1; |
1122 | } | |
1123 | ||
1124 | free(good); | |
1125 | ||
1126 | out: | |
1127 | for (i = 0; i < cb.cb_used; i++) | |
572e2857 BB |
1128 | zfs_close(cb.cb_handles[i]); |
1129 | free(cb.cb_handles); | |
34dc7c2f BB |
1130 | |
1131 | return (ret); | |
1132 | } | |
1133 | ||
34dc7c2f BB |
1134 | static int |
1135 | mountpoint_compare(const void *a, const void *b) | |
1136 | { | |
1137 | const char *mounta = *((char **)a); | |
1138 | const char *mountb = *((char **)b); | |
1139 | ||
1140 | return (strcmp(mountb, mounta)); | |
1141 | } | |
1142 | ||
428870ff BB |
1143 | /* alias for 2002/240 */ |
1144 | #pragma weak zpool_unmount_datasets = zpool_disable_datasets | |
34dc7c2f BB |
1145 | /* |
1146 | * Unshare and unmount all datasets within the given pool. We don't want to | |
1147 | * rely on traversing the DSL to discover the filesystems within the pool, | |
1148 | * because this may be expensive (if not all of them are mounted), and can fail | |
9a616b5d | 1149 | * arbitrarily (on I/O error, for example). Instead, we walk /etc/mtab and |
34dc7c2f BB |
1150 | * gather all the filesystems that are currently mounted. |
1151 | */ | |
34dc7c2f BB |
1152 | int |
1153 | zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) | |
1154 | { | |
1155 | int used, alloc; | |
1156 | struct mnttab entry; | |
1157 | size_t namelen; | |
1158 | char **mountpoints = NULL; | |
1159 | zfs_handle_t **datasets = NULL; | |
1160 | libzfs_handle_t *hdl = zhp->zpool_hdl; | |
1161 | int i; | |
1162 | int ret = -1; | |
1163 | int flags = (force ? MS_FORCE : 0); | |
1164 | ||
34dc7c2f BB |
1165 | namelen = strlen(zhp->zpool_name); |
1166 | ||
1167 | rewind(hdl->libzfs_mnttab); | |
1168 | used = alloc = 0; | |
1169 | while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { | |
1170 | /* | |
1171 | * Ignore non-ZFS entries. | |
1172 | */ | |
1173 | if (entry.mnt_fstype == NULL || | |
1174 | strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) | |
1175 | continue; | |
1176 | ||
1177 | /* | |
1178 | * Ignore filesystems not within this pool. | |
1179 | */ | |
1180 | if (entry.mnt_mountp == NULL || | |
1181 | strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || | |
1182 | (entry.mnt_special[namelen] != '/' && | |
1183 | entry.mnt_special[namelen] != '\0')) | |
1184 | continue; | |
1185 | ||
1186 | /* | |
1187 | * At this point we've found a filesystem within our pool. Add | |
1188 | * it to our growing list. | |
1189 | */ | |
1190 | if (used == alloc) { | |
1191 | if (alloc == 0) { | |
1192 | if ((mountpoints = zfs_alloc(hdl, | |
1193 | 8 * sizeof (void *))) == NULL) | |
1194 | goto out; | |
1195 | ||
1196 | if ((datasets = zfs_alloc(hdl, | |
1197 | 8 * sizeof (void *))) == NULL) | |
1198 | goto out; | |
1199 | ||
1200 | alloc = 8; | |
1201 | } else { | |
1202 | void *ptr; | |
1203 | ||
1204 | if ((ptr = zfs_realloc(hdl, mountpoints, | |
1205 | alloc * sizeof (void *), | |
1206 | alloc * 2 * sizeof (void *))) == NULL) | |
1207 | goto out; | |
1208 | mountpoints = ptr; | |
1209 | ||
1210 | if ((ptr = zfs_realloc(hdl, datasets, | |
1211 | alloc * sizeof (void *), | |
1212 | alloc * 2 * sizeof (void *))) == NULL) | |
1213 | goto out; | |
1214 | datasets = ptr; | |
1215 | ||
1216 | alloc *= 2; | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | if ((mountpoints[used] = zfs_strdup(hdl, | |
1221 | entry.mnt_mountp)) == NULL) | |
1222 | goto out; | |
1223 | ||
1224 | /* | |
1225 | * This is allowed to fail, in case there is some I/O error. It | |
1226 | * is only used to determine if we need to remove the underlying | |
1227 | * mountpoint, so failure is not fatal. | |
1228 | */ | |
1229 | datasets[used] = make_dataset_handle(hdl, entry.mnt_special); | |
1230 | ||
1231 | used++; | |
1232 | } | |
1233 | ||
1234 | /* | |
1235 | * At this point, we have the entire list of filesystems, so sort it by | |
1236 | * mountpoint. | |
1237 | */ | |
1238 | qsort(mountpoints, used, sizeof (char *), mountpoint_compare); | |
1239 | ||
1240 | /* | |
1241 | * Walk through and first unshare everything. | |
1242 | */ | |
1243 | for (i = 0; i < used; i++) { | |
1244 | zfs_share_proto_t *curr_proto; | |
1245 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
1246 | curr_proto++) { | |
1247 | if (is_shared(hdl, mountpoints[i], *curr_proto) && | |
1248 | unshare_one(hdl, mountpoints[i], | |
1249 | mountpoints[i], *curr_proto) != 0) | |
1250 | goto out; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Now unmount everything, removing the underlying directories as | |
1256 | * appropriate. | |
1257 | */ | |
1258 | for (i = 0; i < used; i++) { | |
1259 | if (unmount_one(hdl, mountpoints[i], flags) != 0) | |
1260 | goto out; | |
1261 | } | |
1262 | ||
1263 | for (i = 0; i < used; i++) { | |
1264 | if (datasets[i]) | |
1265 | remove_mountpoint(datasets[i]); | |
1266 | } | |
1267 | ||
1268 | ret = 0; | |
1269 | out: | |
1270 | for (i = 0; i < used; i++) { | |
1271 | if (datasets[i]) | |
1272 | zfs_close(datasets[i]); | |
1273 | free(mountpoints[i]); | |
1274 | } | |
1275 | free(datasets); | |
1276 | free(mountpoints); | |
1277 | ||
1278 | return (ret); | |
1279 | } |