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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 | |
3fb1fcde | 443 | * mount. We don't perform this check if 'remount' is specified. |
34dc7c2f | 444 | */ |
2cf7f52b | 445 | if (!remount && !dir_is_empty(mountpoint)) { |
34dc7c2f BB |
446 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
447 | "directory is not empty")); | |
448 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
449 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); | |
450 | } | |
451 | ||
452 | /* perform the mount */ | |
3fb1fcde BB |
453 | rc = do_mount(zfs_get_name(zhp), mountpoint, mntopts); |
454 | if (rc) { | |
34dc7c2f BB |
455 | /* |
456 | * Generic errors are nasty, but there are just way too many | |
457 | * from mount(), and they're well-understood. We pick a few | |
458 | * common ones to improve upon. | |
459 | */ | |
3fb1fcde | 460 | if (rc == EBUSY) { |
34dc7c2f BB |
461 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
462 | "mountpoint or dataset is busy")); | |
3fb1fcde | 463 | } else if (rc == EPERM) { |
34dc7c2f BB |
464 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
465 | "Insufficient privileges")); | |
3fb1fcde | 466 | } else if (rc == ENOTSUP) { |
428870ff BB |
467 | char buf[256]; |
468 | int spa_version; | |
469 | ||
470 | VERIFY(zfs_spa_version(zhp, &spa_version) == 0); | |
471 | (void) snprintf(buf, sizeof (buf), | |
472 | dgettext(TEXT_DOMAIN, "Can't mount a version %lld " | |
473 | "file system on a version %d pool. Pool must be" | |
474 | " upgraded to mount this file system."), | |
475 | (u_longlong_t)zfs_prop_get_int(zhp, | |
476 | ZFS_PROP_VERSION), spa_version); | |
477 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); | |
34dc7c2f | 478 | } else { |
3fb1fcde | 479 | zfs_error_aux(hdl, strerror(rc)); |
34dc7c2f | 480 | } |
34dc7c2f BB |
481 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, |
482 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
483 | zhp->zfs_name)); | |
484 | } | |
485 | ||
2cf7f52b BB |
486 | /* remove the mounted entry before re-adding on remount */ |
487 | if (remount) | |
488 | libzfs_mnttab_remove(hdl, zhp->zfs_name); | |
489 | ||
fb5f0bc8 | 490 | /* add the mounted entry into our cache */ |
3fb1fcde | 491 | libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, mntopts); |
34dc7c2f BB |
492 | return (0); |
493 | } | |
494 | ||
495 | /* | |
496 | * Unmount a single filesystem. | |
497 | */ | |
498 | static int | |
499 | unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) | |
500 | { | |
9ac97c2a BB |
501 | int error; |
502 | ||
503 | error = do_unmount(mountpoint, flags); | |
504 | if (error != 0) { | |
34dc7c2f BB |
505 | return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, |
506 | dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), | |
507 | mountpoint)); | |
508 | } | |
509 | ||
510 | return (0); | |
511 | } | |
512 | ||
513 | /* | |
514 | * Unmount the given filesystem. | |
515 | */ | |
516 | int | |
517 | zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) | |
518 | { | |
fb5f0bc8 BB |
519 | libzfs_handle_t *hdl = zhp->zfs_hdl; |
520 | struct mnttab entry; | |
34dc7c2f BB |
521 | char *mntpt = NULL; |
522 | ||
fb5f0bc8 | 523 | /* check to see if we need to unmount the filesystem */ |
34dc7c2f | 524 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && |
fb5f0bc8 | 525 | libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { |
34dc7c2f BB |
526 | /* |
527 | * mountpoint may have come from a call to | |
528 | * getmnt/getmntany if it isn't NULL. If it is NULL, | |
fb5f0bc8 BB |
529 | * we know it comes from libzfs_mnttab_find which can |
530 | * then get freed later. We strdup it to play it safe. | |
34dc7c2f BB |
531 | */ |
532 | if (mountpoint == NULL) | |
fb5f0bc8 | 533 | mntpt = zfs_strdup(hdl, entry.mnt_mountp); |
34dc7c2f | 534 | else |
fb5f0bc8 | 535 | mntpt = zfs_strdup(hdl, mountpoint); |
34dc7c2f BB |
536 | |
537 | /* | |
538 | * Unshare and unmount the filesystem | |
539 | */ | |
540 | if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) | |
541 | return (-1); | |
542 | ||
fb5f0bc8 | 543 | if (unmount_one(hdl, mntpt, flags) != 0) { |
34dc7c2f BB |
544 | free(mntpt); |
545 | (void) zfs_shareall(zhp); | |
546 | return (-1); | |
547 | } | |
fb5f0bc8 | 548 | libzfs_mnttab_remove(hdl, zhp->zfs_name); |
34dc7c2f BB |
549 | free(mntpt); |
550 | } | |
551 | ||
552 | return (0); | |
553 | } | |
554 | ||
555 | /* | |
556 | * Unmount this filesystem and any children inheriting the mountpoint property. | |
557 | * To do this, just act like we're changing the mountpoint property, but don't | |
558 | * remount the filesystems afterwards. | |
559 | */ | |
560 | int | |
561 | zfs_unmountall(zfs_handle_t *zhp, int flags) | |
562 | { | |
563 | prop_changelist_t *clp; | |
564 | int ret; | |
565 | ||
b128c09f | 566 | clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); |
34dc7c2f BB |
567 | if (clp == NULL) |
568 | return (-1); | |
569 | ||
570 | ret = changelist_prefix(clp); | |
571 | changelist_free(clp); | |
572 | ||
573 | return (ret); | |
574 | } | |
575 | ||
576 | boolean_t | |
577 | zfs_is_shared(zfs_handle_t *zhp) | |
578 | { | |
579 | zfs_share_type_t rc = 0; | |
580 | zfs_share_proto_t *curr_proto; | |
581 | ||
582 | if (ZFS_IS_VOLUME(zhp)) | |
428870ff | 583 | return (B_FALSE); |
34dc7c2f BB |
584 | |
585 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
586 | curr_proto++) | |
587 | rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); | |
588 | ||
589 | return (rc ? B_TRUE : B_FALSE); | |
590 | } | |
591 | ||
592 | int | |
593 | zfs_share(zfs_handle_t *zhp) | |
594 | { | |
572e2857 | 595 | assert(!ZFS_IS_VOLUME(zhp)); |
34dc7c2f BB |
596 | return (zfs_share_proto(zhp, share_all_proto)); |
597 | } | |
598 | ||
599 | int | |
600 | zfs_unshare(zfs_handle_t *zhp) | |
601 | { | |
572e2857 | 602 | assert(!ZFS_IS_VOLUME(zhp)); |
34dc7c2f BB |
603 | return (zfs_unshareall(zhp)); |
604 | } | |
605 | ||
606 | /* | |
607 | * Check to see if the filesystem is currently shared. | |
608 | */ | |
609 | zfs_share_type_t | |
610 | zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) | |
611 | { | |
612 | char *mountpoint; | |
613 | zfs_share_type_t rc; | |
614 | ||
615 | if (!zfs_is_mounted(zhp, &mountpoint)) | |
616 | return (SHARED_NOT_SHARED); | |
617 | ||
149e873a | 618 | if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto))) { |
34dc7c2f BB |
619 | if (where != NULL) |
620 | *where = mountpoint; | |
621 | else | |
622 | free(mountpoint); | |
623 | return (rc); | |
624 | } else { | |
625 | free(mountpoint); | |
626 | return (SHARED_NOT_SHARED); | |
627 | } | |
628 | } | |
629 | ||
630 | boolean_t | |
631 | zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) | |
632 | { | |
633 | return (zfs_is_shared_proto(zhp, where, | |
634 | PROTO_NFS) != SHARED_NOT_SHARED); | |
635 | } | |
636 | ||
637 | boolean_t | |
638 | zfs_is_shared_smb(zfs_handle_t *zhp, char **where) | |
639 | { | |
640 | return (zfs_is_shared_proto(zhp, where, | |
641 | PROTO_SMB) != SHARED_NOT_SHARED); | |
642 | } | |
643 | ||
644 | /* | |
645 | * Make sure things will work if libshare isn't installed by using | |
646 | * wrapper functions that check to see that the pointers to functions | |
647 | * initialized in _zfs_init_libshare() are actually present. | |
648 | */ | |
649 | ||
650 | static sa_handle_t (*_sa_init)(int); | |
651 | static void (*_sa_fini)(sa_handle_t); | |
652 | static sa_share_t (*_sa_find_share)(sa_handle_t, char *); | |
653 | static int (*_sa_enable_share)(sa_share_t, char *); | |
654 | static int (*_sa_disable_share)(sa_share_t, char *); | |
655 | static char *(*_sa_errorstr)(int); | |
656 | static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); | |
657 | static boolean_t (*_sa_needs_refresh)(sa_handle_t *); | |
658 | static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); | |
659 | static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, | |
660 | char *, char *, zprop_source_t, char *, char *, char *); | |
661 | static void (*_sa_update_sharetab_ts)(sa_handle_t); | |
662 | ||
663 | /* | |
664 | * _zfs_init_libshare() | |
665 | * | |
666 | * Find the libshare.so.1 entry points that we use here and save the | |
667 | * values to be used later. This is triggered by the runtime loader. | |
668 | * Make sure the correct ISA version is loaded. | |
669 | */ | |
0ccd9d24 BB |
670 | #ifdef __GNUC__ |
671 | static void | |
672 | _zfs_init_libshare(void) __attribute__((constructor)); | |
673 | #else | |
34dc7c2f | 674 | #pragma init(_zfs_init_libshare) |
0ccd9d24 | 675 | #endif |
34dc7c2f BB |
676 | static void |
677 | _zfs_init_libshare(void) | |
678 | { | |
679 | void *libshare; | |
680 | char path[MAXPATHLEN]; | |
681 | char isa[MAXISALEN]; | |
682 | ||
46e18b3f | 683 | /*#if defined(_LP64) |
34dc7c2f BB |
684 | if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) |
685 | isa[0] = '\0'; | |
46e18b3f | 686 | #else*/ |
34dc7c2f | 687 | isa[0] = '\0'; |
46e18b3f | 688 | /*#endif*/ |
34dc7c2f BB |
689 | (void) snprintf(path, MAXPATHLEN, |
690 | "/usr/lib/%s/libshare.so.1", isa); | |
691 | ||
692 | if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { | |
693 | _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); | |
694 | _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); | |
695 | _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) | |
696 | dlsym(libshare, "sa_find_share"); | |
697 | _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, | |
698 | "sa_enable_share"); | |
699 | _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, | |
700 | "sa_disable_share"); | |
701 | _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); | |
702 | _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) | |
703 | dlsym(libshare, "sa_parse_legacy_options"); | |
704 | _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) | |
705 | dlsym(libshare, "sa_needs_refresh"); | |
706 | _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) | |
707 | dlsym(libshare, "sa_get_zfs_handle"); | |
708 | _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, | |
709 | sa_share_t, char *, char *, zprop_source_t, char *, | |
710 | char *, char *))dlsym(libshare, "sa_zfs_process_share"); | |
711 | _sa_update_sharetab_ts = (void (*)(sa_handle_t)) | |
712 | dlsym(libshare, "sa_update_sharetab_ts"); | |
713 | if (_sa_init == NULL || _sa_fini == NULL || | |
714 | _sa_find_share == NULL || _sa_enable_share == NULL || | |
715 | _sa_disable_share == NULL || _sa_errorstr == NULL || | |
716 | _sa_parse_legacy_options == NULL || | |
717 | _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || | |
718 | _sa_zfs_process_share == NULL || | |
719 | _sa_update_sharetab_ts == NULL) { | |
720 | _sa_init = NULL; | |
721 | _sa_fini = NULL; | |
722 | _sa_disable_share = NULL; | |
723 | _sa_enable_share = NULL; | |
724 | _sa_errorstr = NULL; | |
725 | _sa_parse_legacy_options = NULL; | |
726 | (void) dlclose(libshare); | |
727 | _sa_needs_refresh = NULL; | |
728 | _sa_get_zfs_handle = NULL; | |
729 | _sa_zfs_process_share = NULL; | |
730 | _sa_update_sharetab_ts = NULL; | |
731 | } | |
732 | } | |
733 | } | |
734 | ||
735 | /* | |
736 | * zfs_init_libshare(zhandle, service) | |
737 | * | |
738 | * Initialize the libshare API if it hasn't already been initialized. | |
739 | * In all cases it returns 0 if it succeeded and an error if not. The | |
740 | * service value is which part(s) of the API to initialize and is a | |
741 | * direct map to the libshare sa_init(service) interface. | |
742 | */ | |
743 | int | |
744 | zfs_init_libshare(libzfs_handle_t *zhandle, int service) | |
745 | { | |
746 | int ret = SA_OK; | |
747 | ||
748 | if (_sa_init == NULL) | |
749 | ret = SA_CONFIG_ERR; | |
750 | ||
751 | if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) { | |
752 | /* | |
753 | * We had a cache miss. Most likely it is a new ZFS | |
754 | * dataset that was just created. We want to make sure | |
755 | * so check timestamps to see if a different process | |
756 | * has updated any of the configuration. If there was | |
757 | * some non-ZFS change, we need to re-initialize the | |
758 | * internal cache. | |
759 | */ | |
760 | zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS; | |
761 | if (_sa_needs_refresh != NULL && | |
762 | _sa_needs_refresh(zhandle->libzfs_sharehdl)) { | |
763 | zfs_uninit_libshare(zhandle); | |
764 | zhandle->libzfs_sharehdl = _sa_init(service); | |
765 | } | |
766 | } | |
767 | ||
768 | if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) | |
769 | zhandle->libzfs_sharehdl = _sa_init(service); | |
770 | ||
771 | if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) | |
772 | ret = SA_NO_MEMORY; | |
773 | ||
774 | return (ret); | |
775 | } | |
776 | ||
777 | /* | |
778 | * zfs_uninit_libshare(zhandle) | |
779 | * | |
780 | * Uninitialize the libshare API if it hasn't already been | |
781 | * uninitialized. It is OK to call multiple times. | |
782 | */ | |
783 | void | |
784 | zfs_uninit_libshare(libzfs_handle_t *zhandle) | |
785 | { | |
786 | if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { | |
787 | if (_sa_fini != NULL) | |
788 | _sa_fini(zhandle->libzfs_sharehdl); | |
789 | zhandle->libzfs_sharehdl = NULL; | |
790 | } | |
791 | } | |
792 | ||
793 | /* | |
794 | * zfs_parse_options(options, proto) | |
795 | * | |
796 | * Call the legacy parse interface to get the protocol specific | |
797 | * options using the NULL arg to indicate that this is a "parse" only. | |
798 | */ | |
799 | int | |
800 | zfs_parse_options(char *options, zfs_share_proto_t proto) | |
801 | { | |
802 | if (_sa_parse_legacy_options != NULL) { | |
803 | return (_sa_parse_legacy_options(NULL, options, | |
804 | proto_table[proto].p_name)); | |
805 | } | |
806 | return (SA_CONFIG_ERR); | |
807 | } | |
808 | ||
809 | /* | |
810 | * zfs_sa_find_share(handle, path) | |
811 | * | |
812 | * wrapper around sa_find_share to find a share path in the | |
813 | * configuration. | |
814 | */ | |
815 | static sa_share_t | |
816 | zfs_sa_find_share(sa_handle_t handle, char *path) | |
817 | { | |
818 | if (_sa_find_share != NULL) | |
819 | return (_sa_find_share(handle, path)); | |
820 | return (NULL); | |
821 | } | |
822 | ||
823 | /* | |
824 | * zfs_sa_enable_share(share, proto) | |
825 | * | |
826 | * Wrapper for sa_enable_share which enables a share for a specified | |
827 | * protocol. | |
828 | */ | |
829 | static int | |
830 | zfs_sa_enable_share(sa_share_t share, char *proto) | |
831 | { | |
832 | if (_sa_enable_share != NULL) | |
833 | return (_sa_enable_share(share, proto)); | |
834 | return (SA_CONFIG_ERR); | |
835 | } | |
836 | ||
837 | /* | |
838 | * zfs_sa_disable_share(share, proto) | |
839 | * | |
840 | * Wrapper for sa_enable_share which disables a share for a specified | |
841 | * protocol. | |
842 | */ | |
843 | static int | |
844 | zfs_sa_disable_share(sa_share_t share, char *proto) | |
845 | { | |
846 | if (_sa_disable_share != NULL) | |
847 | return (_sa_disable_share(share, proto)); | |
848 | return (SA_CONFIG_ERR); | |
849 | } | |
850 | ||
851 | /* | |
852 | * Share the given filesystem according to the options in the specified | |
853 | * protocol specific properties (sharenfs, sharesmb). We rely | |
854 | * on "libshare" to the dirty work for us. | |
855 | */ | |
856 | static int | |
857 | zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
858 | { | |
859 | char mountpoint[ZFS_MAXPROPLEN]; | |
860 | char shareopts[ZFS_MAXPROPLEN]; | |
861 | char sourcestr[ZFS_MAXPROPLEN]; | |
862 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
863 | sa_share_t share; | |
864 | zfs_share_proto_t *curr_proto; | |
865 | zprop_source_t sourcetype; | |
866 | int ret; | |
867 | ||
868 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) | |
869 | return (0); | |
870 | ||
871 | if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
872 | (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
873 | dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), | |
874 | zfs_get_name(zhp), _sa_errorstr != NULL ? | |
875 | _sa_errorstr(ret) : ""); | |
876 | return (-1); | |
877 | } | |
878 | ||
879 | for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { | |
880 | /* | |
881 | * Return success if there are no share options. | |
882 | */ | |
883 | if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, | |
884 | shareopts, sizeof (shareopts), &sourcetype, sourcestr, | |
885 | ZFS_MAXPROPLEN, B_FALSE) != 0 || | |
886 | strcmp(shareopts, "off") == 0) | |
887 | continue; | |
888 | ||
889 | /* | |
890 | * If the 'zoned' property is set, then zfs_is_mountable() | |
891 | * will have already bailed out if we are in the global zone. | |
892 | * But local zones cannot be NFS servers, so we ignore it for | |
893 | * local zones as well. | |
894 | */ | |
895 | if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) | |
896 | continue; | |
897 | ||
898 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); | |
899 | if (share == NULL) { | |
900 | /* | |
901 | * This may be a new file system that was just | |
902 | * created so isn't in the internal cache | |
903 | * (second time through). Rather than | |
904 | * reloading the entire configuration, we can | |
905 | * assume ZFS has done the checking and it is | |
906 | * safe to add this to the internal | |
907 | * configuration. | |
908 | */ | |
909 | if (_sa_zfs_process_share(hdl->libzfs_sharehdl, | |
910 | NULL, NULL, mountpoint, | |
911 | proto_table[*curr_proto].p_name, sourcetype, | |
912 | shareopts, sourcestr, zhp->zfs_name) != SA_OK) { | |
913 | (void) zfs_error_fmt(hdl, | |
914 | proto_table[*curr_proto].p_share_err, | |
915 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
916 | zfs_get_name(zhp)); | |
917 | return (-1); | |
918 | } | |
919 | hdl->libzfs_shareflags |= ZFSSHARE_MISS; | |
920 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, | |
921 | mountpoint); | |
922 | } | |
923 | if (share != NULL) { | |
924 | int err; | |
925 | err = zfs_sa_enable_share(share, | |
926 | proto_table[*curr_proto].p_name); | |
927 | if (err != SA_OK) { | |
928 | (void) zfs_error_fmt(hdl, | |
929 | proto_table[*curr_proto].p_share_err, | |
930 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
931 | zfs_get_name(zhp)); | |
932 | return (-1); | |
933 | } | |
934 | } else { | |
935 | (void) zfs_error_fmt(hdl, | |
936 | proto_table[*curr_proto].p_share_err, | |
937 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
938 | zfs_get_name(zhp)); | |
939 | return (-1); | |
940 | } | |
941 | ||
942 | } | |
943 | return (0); | |
944 | } | |
945 | ||
946 | ||
947 | int | |
948 | zfs_share_nfs(zfs_handle_t *zhp) | |
949 | { | |
950 | return (zfs_share_proto(zhp, nfs_only)); | |
951 | } | |
952 | ||
953 | int | |
954 | zfs_share_smb(zfs_handle_t *zhp) | |
955 | { | |
956 | return (zfs_share_proto(zhp, smb_only)); | |
957 | } | |
958 | ||
959 | int | |
960 | zfs_shareall(zfs_handle_t *zhp) | |
961 | { | |
962 | return (zfs_share_proto(zhp, share_all_proto)); | |
963 | } | |
964 | ||
965 | /* | |
966 | * Unshare a filesystem by mountpoint. | |
967 | */ | |
968 | static int | |
969 | unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, | |
970 | zfs_share_proto_t proto) | |
971 | { | |
972 | sa_share_t share; | |
973 | int err; | |
974 | char *mntpt; | |
975 | /* | |
976 | * Mountpoint could get trashed if libshare calls getmntany | |
fb5f0bc8 | 977 | * which it does during API initialization, so strdup the |
34dc7c2f BB |
978 | * value. |
979 | */ | |
980 | mntpt = zfs_strdup(hdl, mountpoint); | |
981 | ||
982 | /* make sure libshare initialized */ | |
983 | if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
984 | free(mntpt); /* don't need the copy anymore */ | |
985 | return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
986 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
987 | name, _sa_errorstr(err))); | |
988 | } | |
989 | ||
990 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); | |
991 | free(mntpt); /* don't need the copy anymore */ | |
992 | ||
993 | if (share != NULL) { | |
994 | err = zfs_sa_disable_share(share, proto_table[proto].p_name); | |
995 | if (err != SA_OK) { | |
996 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
997 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
998 | name, _sa_errorstr(err))); | |
999 | } | |
1000 | } else { | |
1001 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
1002 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), | |
1003 | name)); | |
1004 | } | |
1005 | return (0); | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * Unshare the given filesystem. | |
1010 | */ | |
1011 | int | |
1012 | zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, | |
1013 | zfs_share_proto_t *proto) | |
1014 | { | |
fb5f0bc8 BB |
1015 | libzfs_handle_t *hdl = zhp->zfs_hdl; |
1016 | struct mnttab entry; | |
34dc7c2f BB |
1017 | char *mntpt = NULL; |
1018 | ||
1019 | /* check to see if need to unmount the filesystem */ | |
34dc7c2f BB |
1020 | rewind(zhp->zfs_hdl->libzfs_mnttab); |
1021 | if (mountpoint != NULL) | |
fb5f0bc8 | 1022 | mountpoint = mntpt = zfs_strdup(hdl, mountpoint); |
34dc7c2f BB |
1023 | |
1024 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && | |
fb5f0bc8 | 1025 | libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { |
34dc7c2f BB |
1026 | zfs_share_proto_t *curr_proto; |
1027 | ||
1028 | if (mountpoint == NULL) | |
1029 | mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); | |
1030 | ||
1031 | for (curr_proto = proto; *curr_proto != PROTO_END; | |
1032 | curr_proto++) { | |
1033 | ||
fb5f0bc8 BB |
1034 | if (is_shared(hdl, mntpt, *curr_proto) && |
1035 | unshare_one(hdl, zhp->zfs_name, | |
34dc7c2f BB |
1036 | mntpt, *curr_proto) != 0) { |
1037 | if (mntpt != NULL) | |
1038 | free(mntpt); | |
1039 | return (-1); | |
1040 | } | |
1041 | } | |
1042 | } | |
1043 | if (mntpt != NULL) | |
1044 | free(mntpt); | |
1045 | ||
1046 | return (0); | |
1047 | } | |
1048 | ||
1049 | int | |
1050 | zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) | |
1051 | { | |
1052 | return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); | |
1053 | } | |
1054 | ||
1055 | int | |
1056 | zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) | |
1057 | { | |
1058 | return (zfs_unshare_proto(zhp, mountpoint, smb_only)); | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * Same as zfs_unmountall(), but for NFS and SMB unshares. | |
1063 | */ | |
1064 | int | |
1065 | zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
1066 | { | |
1067 | prop_changelist_t *clp; | |
1068 | int ret; | |
1069 | ||
b128c09f | 1070 | clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); |
34dc7c2f BB |
1071 | if (clp == NULL) |
1072 | return (-1); | |
1073 | ||
1074 | ret = changelist_unshare(clp, proto); | |
1075 | changelist_free(clp); | |
1076 | ||
1077 | return (ret); | |
1078 | } | |
1079 | ||
1080 | int | |
1081 | zfs_unshareall_nfs(zfs_handle_t *zhp) | |
1082 | { | |
1083 | return (zfs_unshareall_proto(zhp, nfs_only)); | |
1084 | } | |
1085 | ||
1086 | int | |
1087 | zfs_unshareall_smb(zfs_handle_t *zhp) | |
1088 | { | |
1089 | return (zfs_unshareall_proto(zhp, smb_only)); | |
1090 | } | |
1091 | ||
1092 | int | |
1093 | zfs_unshareall(zfs_handle_t *zhp) | |
1094 | { | |
1095 | return (zfs_unshareall_proto(zhp, share_all_proto)); | |
1096 | } | |
1097 | ||
1098 | int | |
1099 | zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) | |
1100 | { | |
1101 | return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * Remove the mountpoint associated with the current dataset, if necessary. | |
1106 | * We only remove the underlying directory if: | |
1107 | * | |
1108 | * - The mountpoint is not 'none' or 'legacy' | |
1109 | * - The mountpoint is non-empty | |
1110 | * - The mountpoint is the default or inherited | |
1111 | * - The 'zoned' property is set, or we're in a local zone | |
1112 | * | |
1113 | * Any other directories we leave alone. | |
1114 | */ | |
1115 | void | |
1116 | remove_mountpoint(zfs_handle_t *zhp) | |
1117 | { | |
1118 | char mountpoint[ZFS_MAXPROPLEN]; | |
1119 | zprop_source_t source; | |
1120 | ||
1121 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), | |
1122 | &source)) | |
1123 | return; | |
1124 | ||
1125 | if (source == ZPROP_SRC_DEFAULT || | |
1126 | source == ZPROP_SRC_INHERITED) { | |
1127 | /* | |
1128 | * Try to remove the directory, silently ignoring any errors. | |
1129 | * The filesystem may have since been removed or moved around, | |
1130 | * and this error isn't really useful to the administrator in | |
1131 | * any way. | |
1132 | */ | |
1133 | (void) rmdir(mountpoint); | |
1134 | } | |
1135 | } | |
1136 | ||
572e2857 BB |
1137 | void |
1138 | libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp) | |
1139 | { | |
1140 | if (cbp->cb_alloc == cbp->cb_used) { | |
1141 | size_t newsz; | |
1142 | void *ptr; | |
1143 | ||
1144 | newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64; | |
1145 | ptr = zfs_realloc(zhp->zfs_hdl, | |
1146 | cbp->cb_handles, cbp->cb_alloc * sizeof (void *), | |
1147 | newsz * sizeof (void *)); | |
1148 | cbp->cb_handles = ptr; | |
1149 | cbp->cb_alloc = newsz; | |
1150 | } | |
1151 | cbp->cb_handles[cbp->cb_used++] = zhp; | |
1152 | } | |
34dc7c2f BB |
1153 | |
1154 | static int | |
1155 | mount_cb(zfs_handle_t *zhp, void *data) | |
1156 | { | |
572e2857 | 1157 | get_all_cb_t *cbp = data; |
34dc7c2f | 1158 | |
572e2857 | 1159 | if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) { |
34dc7c2f BB |
1160 | zfs_close(zhp); |
1161 | return (0); | |
1162 | } | |
1163 | ||
1164 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { | |
1165 | zfs_close(zhp); | |
1166 | return (0); | |
1167 | } | |
1168 | ||
572e2857 BB |
1169 | libzfs_add_handle(cbp, zhp); |
1170 | if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) { | |
1171 | zfs_close(zhp); | |
1172 | return (-1); | |
34dc7c2f | 1173 | } |
572e2857 | 1174 | return (0); |
34dc7c2f BB |
1175 | } |
1176 | ||
572e2857 BB |
1177 | int |
1178 | libzfs_dataset_cmp(const void *a, const void *b) | |
34dc7c2f BB |
1179 | { |
1180 | zfs_handle_t **za = (zfs_handle_t **)a; | |
1181 | zfs_handle_t **zb = (zfs_handle_t **)b; | |
1182 | char mounta[MAXPATHLEN]; | |
1183 | char mountb[MAXPATHLEN]; | |
1184 | boolean_t gota, gotb; | |
1185 | ||
1186 | if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1187 | verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, | |
1188 | sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); | |
1189 | if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1190 | verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, | |
1191 | sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); | |
1192 | ||
1193 | if (gota && gotb) | |
1194 | return (strcmp(mounta, mountb)); | |
1195 | ||
1196 | if (gota) | |
1197 | return (-1); | |
1198 | if (gotb) | |
1199 | return (1); | |
1200 | ||
1201 | return (strcmp(zfs_get_name(a), zfs_get_name(b))); | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * Mount and share all datasets within the given pool. This assumes that no | |
1206 | * datasets within the pool are currently mounted. Because users can create | |
1207 | * complicated nested hierarchies of mountpoints, we first gather all the | |
1208 | * datasets and mountpoints within the pool, and sort them by mountpoint. Once | |
1209 | * we have the list of all filesystems, we iterate over them in order and mount | |
1210 | * and/or share each one. | |
1211 | */ | |
1212 | #pragma weak zpool_mount_datasets = zpool_enable_datasets | |
1213 | int | |
1214 | zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) | |
1215 | { | |
572e2857 | 1216 | get_all_cb_t cb = { 0 }; |
34dc7c2f BB |
1217 | libzfs_handle_t *hdl = zhp->zpool_hdl; |
1218 | zfs_handle_t *zfsp; | |
1219 | int i, ret = -1; | |
1220 | int *good; | |
1221 | ||
1222 | /* | |
1223 | * Gather all non-snap datasets within the pool. | |
1224 | */ | |
34dc7c2f BB |
1225 | if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) |
1226 | goto out; | |
1227 | ||
572e2857 | 1228 | libzfs_add_handle(&cb, zfsp); |
34dc7c2f BB |
1229 | if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) |
1230 | goto out; | |
34dc7c2f BB |
1231 | /* |
1232 | * Sort the datasets by mountpoint. | |
1233 | */ | |
572e2857 BB |
1234 | qsort(cb.cb_handles, cb.cb_used, sizeof (void *), |
1235 | libzfs_dataset_cmp); | |
34dc7c2f BB |
1236 | |
1237 | /* | |
1238 | * And mount all the datasets, keeping track of which ones | |
d164b209 | 1239 | * succeeded or failed. |
34dc7c2f | 1240 | */ |
d164b209 BB |
1241 | if ((good = zfs_alloc(zhp->zpool_hdl, |
1242 | cb.cb_used * sizeof (int))) == NULL) | |
1243 | goto out; | |
1244 | ||
34dc7c2f BB |
1245 | ret = 0; |
1246 | for (i = 0; i < cb.cb_used; i++) { | |
572e2857 | 1247 | if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0) |
34dc7c2f BB |
1248 | ret = -1; |
1249 | else | |
1250 | good[i] = 1; | |
1251 | } | |
1252 | ||
1253 | /* | |
1254 | * Then share all the ones that need to be shared. This needs | |
1255 | * to be a separate pass in order to avoid excessive reloading | |
1256 | * of the configuration. Good should never be NULL since | |
1257 | * zfs_alloc is supposed to exit if memory isn't available. | |
1258 | */ | |
1259 | for (i = 0; i < cb.cb_used; i++) { | |
572e2857 | 1260 | if (good[i] && zfs_share(cb.cb_handles[i]) != 0) |
34dc7c2f BB |
1261 | ret = -1; |
1262 | } | |
1263 | ||
1264 | free(good); | |
1265 | ||
1266 | out: | |
1267 | for (i = 0; i < cb.cb_used; i++) | |
572e2857 BB |
1268 | zfs_close(cb.cb_handles[i]); |
1269 | free(cb.cb_handles); | |
34dc7c2f BB |
1270 | |
1271 | return (ret); | |
1272 | } | |
1273 | ||
34dc7c2f BB |
1274 | static int |
1275 | mountpoint_compare(const void *a, const void *b) | |
1276 | { | |
1277 | const char *mounta = *((char **)a); | |
1278 | const char *mountb = *((char **)b); | |
1279 | ||
1280 | return (strcmp(mountb, mounta)); | |
1281 | } | |
1282 | ||
428870ff BB |
1283 | /* alias for 2002/240 */ |
1284 | #pragma weak zpool_unmount_datasets = zpool_disable_datasets | |
34dc7c2f BB |
1285 | /* |
1286 | * Unshare and unmount all datasets within the given pool. We don't want to | |
1287 | * rely on traversing the DSL to discover the filesystems within the pool, | |
1288 | * because this may be expensive (if not all of them are mounted), and can fail | |
9a616b5d | 1289 | * arbitrarily (on I/O error, for example). Instead, we walk /etc/mtab and |
34dc7c2f BB |
1290 | * gather all the filesystems that are currently mounted. |
1291 | */ | |
34dc7c2f BB |
1292 | int |
1293 | zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) | |
1294 | { | |
1295 | int used, alloc; | |
1296 | struct mnttab entry; | |
1297 | size_t namelen; | |
1298 | char **mountpoints = NULL; | |
1299 | zfs_handle_t **datasets = NULL; | |
1300 | libzfs_handle_t *hdl = zhp->zpool_hdl; | |
1301 | int i; | |
1302 | int ret = -1; | |
1303 | int flags = (force ? MS_FORCE : 0); | |
1304 | ||
34dc7c2f BB |
1305 | namelen = strlen(zhp->zpool_name); |
1306 | ||
1307 | rewind(hdl->libzfs_mnttab); | |
1308 | used = alloc = 0; | |
1309 | while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { | |
1310 | /* | |
1311 | * Ignore non-ZFS entries. | |
1312 | */ | |
1313 | if (entry.mnt_fstype == NULL || | |
1314 | strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) | |
1315 | continue; | |
1316 | ||
1317 | /* | |
1318 | * Ignore filesystems not within this pool. | |
1319 | */ | |
1320 | if (entry.mnt_mountp == NULL || | |
1321 | strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || | |
1322 | (entry.mnt_special[namelen] != '/' && | |
1323 | entry.mnt_special[namelen] != '\0')) | |
1324 | continue; | |
1325 | ||
1326 | /* | |
1327 | * At this point we've found a filesystem within our pool. Add | |
1328 | * it to our growing list. | |
1329 | */ | |
1330 | if (used == alloc) { | |
1331 | if (alloc == 0) { | |
1332 | if ((mountpoints = zfs_alloc(hdl, | |
1333 | 8 * sizeof (void *))) == NULL) | |
1334 | goto out; | |
1335 | ||
1336 | if ((datasets = zfs_alloc(hdl, | |
1337 | 8 * sizeof (void *))) == NULL) | |
1338 | goto out; | |
1339 | ||
1340 | alloc = 8; | |
1341 | } else { | |
1342 | void *ptr; | |
1343 | ||
1344 | if ((ptr = zfs_realloc(hdl, mountpoints, | |
1345 | alloc * sizeof (void *), | |
1346 | alloc * 2 * sizeof (void *))) == NULL) | |
1347 | goto out; | |
1348 | mountpoints = ptr; | |
1349 | ||
1350 | if ((ptr = zfs_realloc(hdl, datasets, | |
1351 | alloc * sizeof (void *), | |
1352 | alloc * 2 * sizeof (void *))) == NULL) | |
1353 | goto out; | |
1354 | datasets = ptr; | |
1355 | ||
1356 | alloc *= 2; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | if ((mountpoints[used] = zfs_strdup(hdl, | |
1361 | entry.mnt_mountp)) == NULL) | |
1362 | goto out; | |
1363 | ||
1364 | /* | |
1365 | * This is allowed to fail, in case there is some I/O error. It | |
1366 | * is only used to determine if we need to remove the underlying | |
1367 | * mountpoint, so failure is not fatal. | |
1368 | */ | |
1369 | datasets[used] = make_dataset_handle(hdl, entry.mnt_special); | |
1370 | ||
1371 | used++; | |
1372 | } | |
1373 | ||
1374 | /* | |
1375 | * At this point, we have the entire list of filesystems, so sort it by | |
1376 | * mountpoint. | |
1377 | */ | |
1378 | qsort(mountpoints, used, sizeof (char *), mountpoint_compare); | |
1379 | ||
1380 | /* | |
1381 | * Walk through and first unshare everything. | |
1382 | */ | |
1383 | for (i = 0; i < used; i++) { | |
1384 | zfs_share_proto_t *curr_proto; | |
1385 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
1386 | curr_proto++) { | |
1387 | if (is_shared(hdl, mountpoints[i], *curr_proto) && | |
1388 | unshare_one(hdl, mountpoints[i], | |
1389 | mountpoints[i], *curr_proto) != 0) | |
1390 | goto out; | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | /* | |
1395 | * Now unmount everything, removing the underlying directories as | |
1396 | * appropriate. | |
1397 | */ | |
1398 | for (i = 0; i < used; i++) { | |
1399 | if (unmount_one(hdl, mountpoints[i], flags) != 0) | |
1400 | goto out; | |
1401 | } | |
1402 | ||
1403 | for (i = 0; i < used; i++) { | |
1404 | if (datasets[i]) | |
1405 | remove_mountpoint(datasets[i]); | |
1406 | } | |
1407 | ||
1408 | ret = 0; | |
1409 | out: | |
1410 | for (i = 0; i < used; i++) { | |
1411 | if (datasets[i]) | |
1412 | zfs_close(datasets[i]); | |
1413 | free(mountpoints[i]); | |
1414 | } | |
1415 | free(datasets); | |
1416 | free(mountpoints); | |
1417 | ||
1418 | return (ret); | |
1419 | } |