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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 | /* | |
23 | * Copyright 2008 Sun Microsystems, Inc. All rights reserved. | |
24 | * Use is subject to license terms. | |
25 | */ | |
26 | ||
34dc7c2f BB |
27 | /* |
28 | * Routines to manage ZFS mounts. We separate all the nasty routines that have | |
29 | * to deal with the OS. The following functions are the main entry points -- | |
30 | * they are used by mount and unmount and when changing a filesystem's | |
31 | * mountpoint. | |
32 | * | |
33 | * zfs_is_mounted() | |
34 | * zfs_mount() | |
35 | * zfs_unmount() | |
36 | * zfs_unmountall() | |
37 | * | |
38 | * This file also contains the functions used to manage sharing filesystems via | |
39 | * NFS and iSCSI: | |
40 | * | |
41 | * zfs_is_shared() | |
42 | * zfs_share() | |
43 | * zfs_unshare() | |
44 | * | |
45 | * zfs_is_shared_nfs() | |
46 | * zfs_is_shared_smb() | |
47 | * zfs_is_shared_iscsi() | |
48 | * zfs_share_proto() | |
49 | * zfs_shareall(); | |
50 | * zfs_share_iscsi() | |
51 | * zfs_unshare_nfs() | |
52 | * zfs_unshare_smb() | |
53 | * zfs_unshareall_nfs() | |
54 | * zfs_unshareall_smb() | |
55 | * zfs_unshareall() | |
56 | * zfs_unshareall_bypath() | |
57 | * zfs_unshare_iscsi() | |
58 | * | |
59 | * The following functions are available for pool consumers, and will | |
60 | * mount/unmount and share/unshare all datasets within pool: | |
61 | * | |
62 | * zpool_enable_datasets() | |
63 | * zpool_disable_datasets() | |
64 | */ | |
65 | ||
66 | #include <dirent.h> | |
67 | #include <dlfcn.h> | |
68 | #include <errno.h> | |
69 | #include <libgen.h> | |
70 | #include <libintl.h> | |
71 | #include <stdio.h> | |
72 | #include <stdlib.h> | |
73 | #include <strings.h> | |
74 | #include <unistd.h> | |
75 | #include <zone.h> | |
76 | #include <sys/mntent.h> | |
34dc7c2f BB |
77 | #include <sys/mount.h> |
78 | #include <sys/stat.h> | |
79 | ||
80 | #include <libzfs.h> | |
81 | ||
82 | #include "libzfs_impl.h" | |
83 | ||
84 | #include <libshare.h> | |
85 | #include <sys/systeminfo.h> | |
86 | #define MAXISALEN 257 /* based on sysinfo(2) man page */ | |
87 | ||
88 | static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); | |
89 | zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, | |
90 | zfs_share_proto_t); | |
91 | ||
92 | static int (*iscsitgt_zfs_share)(const char *); | |
93 | static int (*iscsitgt_zfs_unshare)(const char *); | |
94 | static int (*iscsitgt_zfs_is_shared)(const char *); | |
95 | static int (*iscsitgt_svc_online)(); | |
96 | ||
97 | /* | |
98 | * The share protocols table must be in the same order as the zfs_share_prot_t | |
99 | * enum in libzfs_impl.h | |
100 | */ | |
101 | typedef struct { | |
102 | zfs_prop_t p_prop; | |
103 | char *p_name; | |
104 | int p_share_err; | |
105 | int p_unshare_err; | |
106 | } proto_table_t; | |
107 | ||
108 | proto_table_t proto_table[PROTO_END] = { | |
109 | {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, | |
110 | {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, | |
111 | }; | |
112 | ||
113 | zfs_share_proto_t nfs_only[] = { | |
114 | PROTO_NFS, | |
115 | PROTO_END | |
116 | }; | |
117 | ||
118 | zfs_share_proto_t smb_only[] = { | |
119 | PROTO_SMB, | |
120 | PROTO_END | |
121 | }; | |
122 | zfs_share_proto_t share_all_proto[] = { | |
123 | PROTO_NFS, | |
124 | PROTO_SMB, | |
125 | PROTO_END | |
126 | }; | |
127 | ||
128 | #pragma init(zfs_iscsi_init) | |
129 | static void | |
130 | zfs_iscsi_init(void) | |
131 | { | |
132 | void *libiscsitgt; | |
133 | ||
134 | if ((libiscsitgt = dlopen("/lib/libiscsitgt.so.1", | |
135 | RTLD_LAZY | RTLD_GLOBAL)) == NULL || | |
136 | (iscsitgt_zfs_share = (int (*)(const char *))dlsym(libiscsitgt, | |
137 | "iscsitgt_zfs_share")) == NULL || | |
138 | (iscsitgt_zfs_unshare = (int (*)(const char *))dlsym(libiscsitgt, | |
139 | "iscsitgt_zfs_unshare")) == NULL || | |
140 | (iscsitgt_zfs_is_shared = (int (*)(const char *))dlsym(libiscsitgt, | |
141 | "iscsitgt_zfs_is_shared")) == NULL || | |
142 | (iscsitgt_svc_online = (int (*)(const char *))dlsym(libiscsitgt, | |
143 | "iscsitgt_svc_online")) == NULL) { | |
144 | iscsitgt_zfs_share = NULL; | |
145 | iscsitgt_zfs_unshare = NULL; | |
146 | iscsitgt_zfs_is_shared = NULL; | |
147 | iscsitgt_svc_online = NULL; | |
148 | } | |
149 | } | |
150 | ||
151 | /* | |
152 | * Search the sharetab for the given mountpoint and protocol, returning | |
153 | * a zfs_share_type_t value. | |
154 | */ | |
155 | static zfs_share_type_t | |
156 | is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) | |
157 | { | |
158 | char buf[MAXPATHLEN], *tab; | |
159 | char *ptr; | |
160 | ||
161 | if (hdl->libzfs_sharetab == NULL) | |
162 | return (SHARED_NOT_SHARED); | |
163 | ||
164 | (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); | |
165 | ||
166 | while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { | |
167 | ||
168 | /* the mountpoint is the first entry on each line */ | |
169 | if ((tab = strchr(buf, '\t')) == NULL) | |
170 | continue; | |
171 | ||
172 | *tab = '\0'; | |
173 | if (strcmp(buf, mountpoint) == 0) { | |
174 | /* | |
175 | * the protocol field is the third field | |
176 | * skip over second field | |
177 | */ | |
178 | ptr = ++tab; | |
179 | if ((tab = strchr(ptr, '\t')) == NULL) | |
180 | continue; | |
181 | ptr = ++tab; | |
182 | if ((tab = strchr(ptr, '\t')) == NULL) | |
183 | continue; | |
184 | *tab = '\0'; | |
185 | if (strcmp(ptr, | |
186 | proto_table[proto].p_name) == 0) { | |
187 | switch (proto) { | |
188 | case PROTO_NFS: | |
189 | return (SHARED_NFS); | |
190 | case PROTO_SMB: | |
191 | return (SHARED_SMB); | |
192 | default: | |
193 | return (0); | |
194 | } | |
195 | } | |
196 | } | |
197 | } | |
198 | ||
199 | return (SHARED_NOT_SHARED); | |
200 | } | |
201 | ||
202 | /* | |
203 | * Returns true if the specified directory is empty. If we can't open the | |
204 | * directory at all, return true so that the mount can fail with a more | |
205 | * informative error message. | |
206 | */ | |
207 | static boolean_t | |
208 | dir_is_empty(const char *dirname) | |
209 | { | |
210 | DIR *dirp; | |
211 | struct dirent64 *dp; | |
212 | ||
213 | if ((dirp = opendir(dirname)) == NULL) | |
214 | return (B_TRUE); | |
215 | ||
216 | while ((dp = readdir64(dirp)) != NULL) { | |
217 | ||
218 | if (strcmp(dp->d_name, ".") == 0 || | |
219 | strcmp(dp->d_name, "..") == 0) | |
220 | continue; | |
221 | ||
222 | (void) closedir(dirp); | |
223 | return (B_FALSE); | |
224 | } | |
225 | ||
226 | (void) closedir(dirp); | |
227 | return (B_TRUE); | |
228 | } | |
229 | ||
230 | /* | |
231 | * Checks to see if the mount is active. If the filesystem is mounted, we fill | |
232 | * in 'where' with the current mountpoint, and return 1. Otherwise, we return | |
233 | * 0. | |
234 | */ | |
235 | boolean_t | |
236 | is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) | |
237 | { | |
fb5f0bc8 | 238 | struct mnttab entry; |
34dc7c2f | 239 | |
fb5f0bc8 | 240 | if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) |
34dc7c2f BB |
241 | return (B_FALSE); |
242 | ||
243 | if (where != NULL) | |
244 | *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); | |
245 | ||
246 | return (B_TRUE); | |
247 | } | |
248 | ||
249 | boolean_t | |
250 | zfs_is_mounted(zfs_handle_t *zhp, char **where) | |
251 | { | |
252 | return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); | |
253 | } | |
254 | ||
255 | /* | |
256 | * Returns true if the given dataset is mountable, false otherwise. Returns the | |
257 | * mountpoint in 'buf'. | |
258 | */ | |
259 | static boolean_t | |
260 | zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, | |
261 | zprop_source_t *source) | |
262 | { | |
263 | char sourceloc[ZFS_MAXNAMELEN]; | |
264 | zprop_source_t sourcetype; | |
265 | ||
266 | if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) | |
267 | return (B_FALSE); | |
268 | ||
269 | verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, | |
270 | &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); | |
271 | ||
272 | if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || | |
273 | strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) | |
274 | return (B_FALSE); | |
275 | ||
276 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) | |
277 | return (B_FALSE); | |
278 | ||
279 | if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && | |
280 | getzoneid() == GLOBAL_ZONEID) | |
281 | return (B_FALSE); | |
282 | ||
283 | if (source) | |
284 | *source = sourcetype; | |
285 | ||
286 | return (B_TRUE); | |
287 | } | |
288 | ||
289 | /* | |
290 | * Mount the given filesystem. | |
291 | */ | |
292 | int | |
293 | zfs_mount(zfs_handle_t *zhp, const char *options, int flags) | |
294 | { | |
295 | struct stat buf; | |
296 | char mountpoint[ZFS_MAXPROPLEN]; | |
297 | char mntopts[MNT_LINE_MAX]; | |
298 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
299 | ||
300 | if (options == NULL) | |
301 | mntopts[0] = '\0'; | |
302 | else | |
303 | (void) strlcpy(mntopts, options, sizeof (mntopts)); | |
304 | ||
305 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) | |
306 | return (0); | |
307 | ||
308 | /* Create the directory if it doesn't already exist */ | |
309 | if (lstat(mountpoint, &buf) != 0) { | |
310 | if (mkdirp(mountpoint, 0755) != 0) { | |
311 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
312 | "failed to create mountpoint")); | |
313 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
314 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
315 | mountpoint)); | |
316 | } | |
317 | } | |
318 | ||
319 | /* | |
320 | * Determine if the mountpoint is empty. If so, refuse to perform the | |
321 | * mount. We don't perform this check if MS_OVERLAY is specified, which | |
322 | * would defeat the point. We also avoid this check if 'remount' is | |
323 | * specified. | |
324 | */ | |
325 | if ((flags & MS_OVERLAY) == 0 && | |
326 | strstr(mntopts, MNTOPT_REMOUNT) == NULL && | |
327 | !dir_is_empty(mountpoint)) { | |
328 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
329 | "directory is not empty")); | |
330 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
331 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); | |
332 | } | |
333 | ||
334 | /* perform the mount */ | |
335 | if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, | |
336 | MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { | |
337 | /* | |
338 | * Generic errors are nasty, but there are just way too many | |
339 | * from mount(), and they're well-understood. We pick a few | |
340 | * common ones to improve upon. | |
341 | */ | |
342 | if (errno == EBUSY) { | |
343 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
344 | "mountpoint or dataset is busy")); | |
345 | } else if (errno == EPERM) { | |
346 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
347 | "Insufficient privileges")); | |
348 | } else { | |
349 | zfs_error_aux(hdl, strerror(errno)); | |
350 | } | |
34dc7c2f BB |
351 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, |
352 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
353 | zhp->zfs_name)); | |
354 | } | |
355 | ||
fb5f0bc8 BB |
356 | /* add the mounted entry into our cache */ |
357 | libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, | |
358 | mntopts); | |
34dc7c2f BB |
359 | return (0); |
360 | } | |
361 | ||
362 | /* | |
363 | * Unmount a single filesystem. | |
364 | */ | |
365 | static int | |
366 | unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) | |
367 | { | |
368 | if (umount2(mountpoint, flags) != 0) { | |
369 | zfs_error_aux(hdl, strerror(errno)); | |
370 | return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, | |
371 | dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), | |
372 | mountpoint)); | |
373 | } | |
374 | ||
375 | return (0); | |
376 | } | |
377 | ||
378 | /* | |
379 | * Unmount the given filesystem. | |
380 | */ | |
381 | int | |
382 | zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) | |
383 | { | |
fb5f0bc8 BB |
384 | libzfs_handle_t *hdl = zhp->zfs_hdl; |
385 | struct mnttab entry; | |
34dc7c2f BB |
386 | char *mntpt = NULL; |
387 | ||
fb5f0bc8 | 388 | /* check to see if we need to unmount the filesystem */ |
34dc7c2f | 389 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && |
fb5f0bc8 | 390 | libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { |
34dc7c2f BB |
391 | /* |
392 | * mountpoint may have come from a call to | |
393 | * getmnt/getmntany if it isn't NULL. If it is NULL, | |
fb5f0bc8 BB |
394 | * we know it comes from libzfs_mnttab_find which can |
395 | * then get freed later. We strdup it to play it safe. | |
34dc7c2f BB |
396 | */ |
397 | if (mountpoint == NULL) | |
fb5f0bc8 | 398 | mntpt = zfs_strdup(hdl, entry.mnt_mountp); |
34dc7c2f | 399 | else |
fb5f0bc8 | 400 | mntpt = zfs_strdup(hdl, mountpoint); |
34dc7c2f BB |
401 | |
402 | /* | |
403 | * Unshare and unmount the filesystem | |
404 | */ | |
405 | if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) | |
406 | return (-1); | |
407 | ||
fb5f0bc8 | 408 | if (unmount_one(hdl, mntpt, flags) != 0) { |
34dc7c2f BB |
409 | free(mntpt); |
410 | (void) zfs_shareall(zhp); | |
411 | return (-1); | |
412 | } | |
fb5f0bc8 | 413 | libzfs_mnttab_remove(hdl, zhp->zfs_name); |
34dc7c2f BB |
414 | free(mntpt); |
415 | } | |
416 | ||
417 | return (0); | |
418 | } | |
419 | ||
420 | /* | |
421 | * Unmount this filesystem and any children inheriting the mountpoint property. | |
422 | * To do this, just act like we're changing the mountpoint property, but don't | |
423 | * remount the filesystems afterwards. | |
424 | */ | |
425 | int | |
426 | zfs_unmountall(zfs_handle_t *zhp, int flags) | |
427 | { | |
428 | prop_changelist_t *clp; | |
429 | int ret; | |
430 | ||
b128c09f | 431 | clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); |
34dc7c2f BB |
432 | if (clp == NULL) |
433 | return (-1); | |
434 | ||
435 | ret = changelist_prefix(clp); | |
436 | changelist_free(clp); | |
437 | ||
438 | return (ret); | |
439 | } | |
440 | ||
441 | boolean_t | |
442 | zfs_is_shared(zfs_handle_t *zhp) | |
443 | { | |
444 | zfs_share_type_t rc = 0; | |
445 | zfs_share_proto_t *curr_proto; | |
446 | ||
447 | if (ZFS_IS_VOLUME(zhp)) | |
448 | return (zfs_is_shared_iscsi(zhp)); | |
449 | ||
450 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
451 | curr_proto++) | |
452 | rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); | |
453 | ||
454 | return (rc ? B_TRUE : B_FALSE); | |
455 | } | |
456 | ||
457 | int | |
458 | zfs_share(zfs_handle_t *zhp) | |
459 | { | |
460 | if (ZFS_IS_VOLUME(zhp)) | |
461 | return (zfs_share_iscsi(zhp)); | |
462 | ||
463 | return (zfs_share_proto(zhp, share_all_proto)); | |
464 | } | |
465 | ||
466 | int | |
467 | zfs_unshare(zfs_handle_t *zhp) | |
468 | { | |
469 | if (ZFS_IS_VOLUME(zhp)) | |
470 | return (zfs_unshare_iscsi(zhp)); | |
471 | ||
472 | return (zfs_unshareall(zhp)); | |
473 | } | |
474 | ||
475 | /* | |
476 | * Check to see if the filesystem is currently shared. | |
477 | */ | |
478 | zfs_share_type_t | |
479 | zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) | |
480 | { | |
481 | char *mountpoint; | |
482 | zfs_share_type_t rc; | |
483 | ||
484 | if (!zfs_is_mounted(zhp, &mountpoint)) | |
485 | return (SHARED_NOT_SHARED); | |
486 | ||
487 | if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) { | |
488 | if (where != NULL) | |
489 | *where = mountpoint; | |
490 | else | |
491 | free(mountpoint); | |
492 | return (rc); | |
493 | } else { | |
494 | free(mountpoint); | |
495 | return (SHARED_NOT_SHARED); | |
496 | } | |
497 | } | |
498 | ||
499 | boolean_t | |
500 | zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) | |
501 | { | |
502 | return (zfs_is_shared_proto(zhp, where, | |
503 | PROTO_NFS) != SHARED_NOT_SHARED); | |
504 | } | |
505 | ||
506 | boolean_t | |
507 | zfs_is_shared_smb(zfs_handle_t *zhp, char **where) | |
508 | { | |
509 | return (zfs_is_shared_proto(zhp, where, | |
510 | PROTO_SMB) != SHARED_NOT_SHARED); | |
511 | } | |
512 | ||
513 | /* | |
514 | * Make sure things will work if libshare isn't installed by using | |
515 | * wrapper functions that check to see that the pointers to functions | |
516 | * initialized in _zfs_init_libshare() are actually present. | |
517 | */ | |
518 | ||
519 | static sa_handle_t (*_sa_init)(int); | |
520 | static void (*_sa_fini)(sa_handle_t); | |
521 | static sa_share_t (*_sa_find_share)(sa_handle_t, char *); | |
522 | static int (*_sa_enable_share)(sa_share_t, char *); | |
523 | static int (*_sa_disable_share)(sa_share_t, char *); | |
524 | static char *(*_sa_errorstr)(int); | |
525 | static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); | |
526 | static boolean_t (*_sa_needs_refresh)(sa_handle_t *); | |
527 | static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); | |
528 | static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, | |
529 | char *, char *, zprop_source_t, char *, char *, char *); | |
530 | static void (*_sa_update_sharetab_ts)(sa_handle_t); | |
531 | ||
532 | /* | |
533 | * _zfs_init_libshare() | |
534 | * | |
535 | * Find the libshare.so.1 entry points that we use here and save the | |
536 | * values to be used later. This is triggered by the runtime loader. | |
537 | * Make sure the correct ISA version is loaded. | |
538 | */ | |
539 | ||
540 | #pragma init(_zfs_init_libshare) | |
541 | static void | |
542 | _zfs_init_libshare(void) | |
543 | { | |
544 | void *libshare; | |
545 | char path[MAXPATHLEN]; | |
546 | char isa[MAXISALEN]; | |
547 | ||
548 | #if defined(_LP64) | |
549 | if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) | |
550 | isa[0] = '\0'; | |
551 | #else | |
552 | isa[0] = '\0'; | |
553 | #endif | |
554 | (void) snprintf(path, MAXPATHLEN, | |
555 | "/usr/lib/%s/libshare.so.1", isa); | |
556 | ||
557 | if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { | |
558 | _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); | |
559 | _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); | |
560 | _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) | |
561 | dlsym(libshare, "sa_find_share"); | |
562 | _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, | |
563 | "sa_enable_share"); | |
564 | _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, | |
565 | "sa_disable_share"); | |
566 | _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); | |
567 | _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) | |
568 | dlsym(libshare, "sa_parse_legacy_options"); | |
569 | _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) | |
570 | dlsym(libshare, "sa_needs_refresh"); | |
571 | _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) | |
572 | dlsym(libshare, "sa_get_zfs_handle"); | |
573 | _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, | |
574 | sa_share_t, char *, char *, zprop_source_t, char *, | |
575 | char *, char *))dlsym(libshare, "sa_zfs_process_share"); | |
576 | _sa_update_sharetab_ts = (void (*)(sa_handle_t)) | |
577 | dlsym(libshare, "sa_update_sharetab_ts"); | |
578 | if (_sa_init == NULL || _sa_fini == NULL || | |
579 | _sa_find_share == NULL || _sa_enable_share == NULL || | |
580 | _sa_disable_share == NULL || _sa_errorstr == NULL || | |
581 | _sa_parse_legacy_options == NULL || | |
582 | _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || | |
583 | _sa_zfs_process_share == NULL || | |
584 | _sa_update_sharetab_ts == NULL) { | |
585 | _sa_init = NULL; | |
586 | _sa_fini = NULL; | |
587 | _sa_disable_share = NULL; | |
588 | _sa_enable_share = NULL; | |
589 | _sa_errorstr = NULL; | |
590 | _sa_parse_legacy_options = NULL; | |
591 | (void) dlclose(libshare); | |
592 | _sa_needs_refresh = NULL; | |
593 | _sa_get_zfs_handle = NULL; | |
594 | _sa_zfs_process_share = NULL; | |
595 | _sa_update_sharetab_ts = NULL; | |
596 | } | |
597 | } | |
598 | } | |
599 | ||
600 | /* | |
601 | * zfs_init_libshare(zhandle, service) | |
602 | * | |
603 | * Initialize the libshare API if it hasn't already been initialized. | |
604 | * In all cases it returns 0 if it succeeded and an error if not. The | |
605 | * service value is which part(s) of the API to initialize and is a | |
606 | * direct map to the libshare sa_init(service) interface. | |
607 | */ | |
608 | int | |
609 | zfs_init_libshare(libzfs_handle_t *zhandle, int service) | |
610 | { | |
611 | int ret = SA_OK; | |
612 | ||
613 | if (_sa_init == NULL) | |
614 | ret = SA_CONFIG_ERR; | |
615 | ||
616 | if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) { | |
617 | /* | |
618 | * We had a cache miss. Most likely it is a new ZFS | |
619 | * dataset that was just created. We want to make sure | |
620 | * so check timestamps to see if a different process | |
621 | * has updated any of the configuration. If there was | |
622 | * some non-ZFS change, we need to re-initialize the | |
623 | * internal cache. | |
624 | */ | |
625 | zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS; | |
626 | if (_sa_needs_refresh != NULL && | |
627 | _sa_needs_refresh(zhandle->libzfs_sharehdl)) { | |
628 | zfs_uninit_libshare(zhandle); | |
629 | zhandle->libzfs_sharehdl = _sa_init(service); | |
630 | } | |
631 | } | |
632 | ||
633 | if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) | |
634 | zhandle->libzfs_sharehdl = _sa_init(service); | |
635 | ||
636 | if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) | |
637 | ret = SA_NO_MEMORY; | |
638 | ||
639 | return (ret); | |
640 | } | |
641 | ||
642 | /* | |
643 | * zfs_uninit_libshare(zhandle) | |
644 | * | |
645 | * Uninitialize the libshare API if it hasn't already been | |
646 | * uninitialized. It is OK to call multiple times. | |
647 | */ | |
648 | void | |
649 | zfs_uninit_libshare(libzfs_handle_t *zhandle) | |
650 | { | |
651 | if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { | |
652 | if (_sa_fini != NULL) | |
653 | _sa_fini(zhandle->libzfs_sharehdl); | |
654 | zhandle->libzfs_sharehdl = NULL; | |
655 | } | |
656 | } | |
657 | ||
658 | /* | |
659 | * zfs_parse_options(options, proto) | |
660 | * | |
661 | * Call the legacy parse interface to get the protocol specific | |
662 | * options using the NULL arg to indicate that this is a "parse" only. | |
663 | */ | |
664 | int | |
665 | zfs_parse_options(char *options, zfs_share_proto_t proto) | |
666 | { | |
667 | if (_sa_parse_legacy_options != NULL) { | |
668 | return (_sa_parse_legacy_options(NULL, options, | |
669 | proto_table[proto].p_name)); | |
670 | } | |
671 | return (SA_CONFIG_ERR); | |
672 | } | |
673 | ||
674 | /* | |
675 | * zfs_sa_find_share(handle, path) | |
676 | * | |
677 | * wrapper around sa_find_share to find a share path in the | |
678 | * configuration. | |
679 | */ | |
680 | static sa_share_t | |
681 | zfs_sa_find_share(sa_handle_t handle, char *path) | |
682 | { | |
683 | if (_sa_find_share != NULL) | |
684 | return (_sa_find_share(handle, path)); | |
685 | return (NULL); | |
686 | } | |
687 | ||
688 | /* | |
689 | * zfs_sa_enable_share(share, proto) | |
690 | * | |
691 | * Wrapper for sa_enable_share which enables a share for a specified | |
692 | * protocol. | |
693 | */ | |
694 | static int | |
695 | zfs_sa_enable_share(sa_share_t share, char *proto) | |
696 | { | |
697 | if (_sa_enable_share != NULL) | |
698 | return (_sa_enable_share(share, proto)); | |
699 | return (SA_CONFIG_ERR); | |
700 | } | |
701 | ||
702 | /* | |
703 | * zfs_sa_disable_share(share, proto) | |
704 | * | |
705 | * Wrapper for sa_enable_share which disables a share for a specified | |
706 | * protocol. | |
707 | */ | |
708 | static int | |
709 | zfs_sa_disable_share(sa_share_t share, char *proto) | |
710 | { | |
711 | if (_sa_disable_share != NULL) | |
712 | return (_sa_disable_share(share, proto)); | |
713 | return (SA_CONFIG_ERR); | |
714 | } | |
715 | ||
716 | /* | |
717 | * Share the given filesystem according to the options in the specified | |
718 | * protocol specific properties (sharenfs, sharesmb). We rely | |
719 | * on "libshare" to the dirty work for us. | |
720 | */ | |
721 | static int | |
722 | zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
723 | { | |
724 | char mountpoint[ZFS_MAXPROPLEN]; | |
725 | char shareopts[ZFS_MAXPROPLEN]; | |
726 | char sourcestr[ZFS_MAXPROPLEN]; | |
727 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
728 | sa_share_t share; | |
729 | zfs_share_proto_t *curr_proto; | |
730 | zprop_source_t sourcetype; | |
731 | int ret; | |
732 | ||
733 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) | |
734 | return (0); | |
735 | ||
736 | if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
737 | (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
738 | dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), | |
739 | zfs_get_name(zhp), _sa_errorstr != NULL ? | |
740 | _sa_errorstr(ret) : ""); | |
741 | return (-1); | |
742 | } | |
743 | ||
744 | for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { | |
745 | /* | |
746 | * Return success if there are no share options. | |
747 | */ | |
748 | if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, | |
749 | shareopts, sizeof (shareopts), &sourcetype, sourcestr, | |
750 | ZFS_MAXPROPLEN, B_FALSE) != 0 || | |
751 | strcmp(shareopts, "off") == 0) | |
752 | continue; | |
753 | ||
754 | /* | |
755 | * If the 'zoned' property is set, then zfs_is_mountable() | |
756 | * will have already bailed out if we are in the global zone. | |
757 | * But local zones cannot be NFS servers, so we ignore it for | |
758 | * local zones as well. | |
759 | */ | |
760 | if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) | |
761 | continue; | |
762 | ||
763 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); | |
764 | if (share == NULL) { | |
765 | /* | |
766 | * This may be a new file system that was just | |
767 | * created so isn't in the internal cache | |
768 | * (second time through). Rather than | |
769 | * reloading the entire configuration, we can | |
770 | * assume ZFS has done the checking and it is | |
771 | * safe to add this to the internal | |
772 | * configuration. | |
773 | */ | |
774 | if (_sa_zfs_process_share(hdl->libzfs_sharehdl, | |
775 | NULL, NULL, mountpoint, | |
776 | proto_table[*curr_proto].p_name, sourcetype, | |
777 | shareopts, sourcestr, zhp->zfs_name) != SA_OK) { | |
778 | (void) zfs_error_fmt(hdl, | |
779 | proto_table[*curr_proto].p_share_err, | |
780 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
781 | zfs_get_name(zhp)); | |
782 | return (-1); | |
783 | } | |
784 | hdl->libzfs_shareflags |= ZFSSHARE_MISS; | |
785 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, | |
786 | mountpoint); | |
787 | } | |
788 | if (share != NULL) { | |
789 | int err; | |
790 | err = zfs_sa_enable_share(share, | |
791 | proto_table[*curr_proto].p_name); | |
792 | if (err != SA_OK) { | |
793 | (void) zfs_error_fmt(hdl, | |
794 | proto_table[*curr_proto].p_share_err, | |
795 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
796 | zfs_get_name(zhp)); | |
797 | return (-1); | |
798 | } | |
799 | } else { | |
800 | (void) zfs_error_fmt(hdl, | |
801 | proto_table[*curr_proto].p_share_err, | |
802 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
803 | zfs_get_name(zhp)); | |
804 | return (-1); | |
805 | } | |
806 | ||
807 | } | |
808 | return (0); | |
809 | } | |
810 | ||
811 | ||
812 | int | |
813 | zfs_share_nfs(zfs_handle_t *zhp) | |
814 | { | |
815 | return (zfs_share_proto(zhp, nfs_only)); | |
816 | } | |
817 | ||
818 | int | |
819 | zfs_share_smb(zfs_handle_t *zhp) | |
820 | { | |
821 | return (zfs_share_proto(zhp, smb_only)); | |
822 | } | |
823 | ||
824 | int | |
825 | zfs_shareall(zfs_handle_t *zhp) | |
826 | { | |
827 | return (zfs_share_proto(zhp, share_all_proto)); | |
828 | } | |
829 | ||
830 | /* | |
831 | * Unshare a filesystem by mountpoint. | |
832 | */ | |
833 | static int | |
834 | unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, | |
835 | zfs_share_proto_t proto) | |
836 | { | |
837 | sa_share_t share; | |
838 | int err; | |
839 | char *mntpt; | |
840 | /* | |
841 | * Mountpoint could get trashed if libshare calls getmntany | |
fb5f0bc8 | 842 | * which it does during API initialization, so strdup the |
34dc7c2f BB |
843 | * value. |
844 | */ | |
845 | mntpt = zfs_strdup(hdl, mountpoint); | |
846 | ||
847 | /* make sure libshare initialized */ | |
848 | if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
849 | free(mntpt); /* don't need the copy anymore */ | |
850 | return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
851 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
852 | name, _sa_errorstr(err))); | |
853 | } | |
854 | ||
855 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); | |
856 | free(mntpt); /* don't need the copy anymore */ | |
857 | ||
858 | if (share != NULL) { | |
859 | err = zfs_sa_disable_share(share, proto_table[proto].p_name); | |
860 | if (err != SA_OK) { | |
861 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
862 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
863 | name, _sa_errorstr(err))); | |
864 | } | |
865 | } else { | |
866 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
867 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), | |
868 | name)); | |
869 | } | |
870 | return (0); | |
871 | } | |
872 | ||
873 | /* | |
874 | * Unshare the given filesystem. | |
875 | */ | |
876 | int | |
877 | zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, | |
878 | zfs_share_proto_t *proto) | |
879 | { | |
fb5f0bc8 BB |
880 | libzfs_handle_t *hdl = zhp->zfs_hdl; |
881 | struct mnttab entry; | |
34dc7c2f BB |
882 | char *mntpt = NULL; |
883 | ||
884 | /* check to see if need to unmount the filesystem */ | |
34dc7c2f BB |
885 | rewind(zhp->zfs_hdl->libzfs_mnttab); |
886 | if (mountpoint != NULL) | |
fb5f0bc8 | 887 | mountpoint = mntpt = zfs_strdup(hdl, mountpoint); |
34dc7c2f BB |
888 | |
889 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && | |
fb5f0bc8 | 890 | libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { |
34dc7c2f BB |
891 | zfs_share_proto_t *curr_proto; |
892 | ||
893 | if (mountpoint == NULL) | |
894 | mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); | |
895 | ||
896 | for (curr_proto = proto; *curr_proto != PROTO_END; | |
897 | curr_proto++) { | |
898 | ||
fb5f0bc8 BB |
899 | if (is_shared(hdl, mntpt, *curr_proto) && |
900 | unshare_one(hdl, zhp->zfs_name, | |
34dc7c2f BB |
901 | mntpt, *curr_proto) != 0) { |
902 | if (mntpt != NULL) | |
903 | free(mntpt); | |
904 | return (-1); | |
905 | } | |
906 | } | |
907 | } | |
908 | if (mntpt != NULL) | |
909 | free(mntpt); | |
910 | ||
911 | return (0); | |
912 | } | |
913 | ||
914 | int | |
915 | zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) | |
916 | { | |
917 | return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); | |
918 | } | |
919 | ||
920 | int | |
921 | zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) | |
922 | { | |
923 | return (zfs_unshare_proto(zhp, mountpoint, smb_only)); | |
924 | } | |
925 | ||
926 | /* | |
927 | * Same as zfs_unmountall(), but for NFS and SMB unshares. | |
928 | */ | |
929 | int | |
930 | zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
931 | { | |
932 | prop_changelist_t *clp; | |
933 | int ret; | |
934 | ||
b128c09f | 935 | clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); |
34dc7c2f BB |
936 | if (clp == NULL) |
937 | return (-1); | |
938 | ||
939 | ret = changelist_unshare(clp, proto); | |
940 | changelist_free(clp); | |
941 | ||
942 | return (ret); | |
943 | } | |
944 | ||
945 | int | |
946 | zfs_unshareall_nfs(zfs_handle_t *zhp) | |
947 | { | |
948 | return (zfs_unshareall_proto(zhp, nfs_only)); | |
949 | } | |
950 | ||
951 | int | |
952 | zfs_unshareall_smb(zfs_handle_t *zhp) | |
953 | { | |
954 | return (zfs_unshareall_proto(zhp, smb_only)); | |
955 | } | |
956 | ||
957 | int | |
958 | zfs_unshareall(zfs_handle_t *zhp) | |
959 | { | |
960 | return (zfs_unshareall_proto(zhp, share_all_proto)); | |
961 | } | |
962 | ||
963 | int | |
964 | zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) | |
965 | { | |
966 | return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); | |
967 | } | |
968 | ||
969 | /* | |
970 | * Remove the mountpoint associated with the current dataset, if necessary. | |
971 | * We only remove the underlying directory if: | |
972 | * | |
973 | * - The mountpoint is not 'none' or 'legacy' | |
974 | * - The mountpoint is non-empty | |
975 | * - The mountpoint is the default or inherited | |
976 | * - The 'zoned' property is set, or we're in a local zone | |
977 | * | |
978 | * Any other directories we leave alone. | |
979 | */ | |
980 | void | |
981 | remove_mountpoint(zfs_handle_t *zhp) | |
982 | { | |
983 | char mountpoint[ZFS_MAXPROPLEN]; | |
984 | zprop_source_t source; | |
985 | ||
986 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), | |
987 | &source)) | |
988 | return; | |
989 | ||
990 | if (source == ZPROP_SRC_DEFAULT || | |
991 | source == ZPROP_SRC_INHERITED) { | |
992 | /* | |
993 | * Try to remove the directory, silently ignoring any errors. | |
994 | * The filesystem may have since been removed or moved around, | |
995 | * and this error isn't really useful to the administrator in | |
996 | * any way. | |
997 | */ | |
998 | (void) rmdir(mountpoint); | |
999 | } | |
1000 | } | |
1001 | ||
1002 | boolean_t | |
1003 | zfs_is_shared_iscsi(zfs_handle_t *zhp) | |
1004 | { | |
1005 | ||
1006 | /* | |
1007 | * If iscsi deamon isn't running then we aren't shared | |
1008 | */ | |
1009 | if (iscsitgt_svc_online && iscsitgt_svc_online() == 1) | |
1010 | return (B_FALSE); | |
1011 | else | |
1012 | return (iscsitgt_zfs_is_shared != NULL && | |
1013 | iscsitgt_zfs_is_shared(zhp->zfs_name) != 0); | |
1014 | } | |
1015 | ||
1016 | int | |
1017 | zfs_share_iscsi(zfs_handle_t *zhp) | |
1018 | { | |
1019 | char shareopts[ZFS_MAXPROPLEN]; | |
1020 | const char *dataset = zhp->zfs_name; | |
1021 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
1022 | ||
1023 | /* | |
1024 | * Return success if there are no share options. | |
1025 | */ | |
1026 | if (zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts, | |
1027 | sizeof (shareopts), NULL, NULL, 0, B_FALSE) != 0 || | |
1028 | strcmp(shareopts, "off") == 0) | |
1029 | return (0); | |
1030 | ||
1031 | if (iscsitgt_zfs_share == NULL || iscsitgt_zfs_share(dataset) != 0) { | |
1032 | int error = EZFS_SHAREISCSIFAILED; | |
1033 | ||
1034 | /* | |
1035 | * If service isn't availabele and EPERM was | |
1036 | * returned then use special error. | |
1037 | */ | |
1038 | if (iscsitgt_svc_online && errno == EPERM && | |
1039 | (iscsitgt_svc_online() != 0)) | |
1040 | error = EZFS_ISCSISVCUNAVAIL; | |
1041 | ||
1042 | return (zfs_error_fmt(hdl, error, | |
1043 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), dataset)); | |
1044 | } | |
1045 | ||
1046 | return (0); | |
1047 | } | |
1048 | ||
1049 | int | |
1050 | zfs_unshare_iscsi(zfs_handle_t *zhp) | |
1051 | { | |
1052 | const char *dataset = zfs_get_name(zhp); | |
1053 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
1054 | ||
1055 | /* | |
1056 | * Return if the volume is not shared | |
1057 | */ | |
1058 | if (zfs_is_shared_iscsi(zhp) != SHARED_ISCSI) | |
1059 | return (0); | |
1060 | ||
1061 | /* | |
1062 | * If this fails with ENODEV it indicates that zvol wasn't shared so | |
1063 | * we should return success in that case. | |
1064 | */ | |
1065 | if (iscsitgt_zfs_unshare == NULL || | |
1066 | (iscsitgt_zfs_unshare(dataset) != 0 && errno != ENODEV)) { | |
1067 | if (errno == EPERM) | |
1068 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1069 | "Insufficient privileges to unshare iscsi")); | |
1070 | return (zfs_error_fmt(hdl, EZFS_UNSHAREISCSIFAILED, | |
1071 | dgettext(TEXT_DOMAIN, "cannot unshare '%s'"), dataset)); | |
1072 | } | |
1073 | ||
1074 | return (0); | |
1075 | } | |
1076 | ||
1077 | typedef struct mount_cbdata { | |
1078 | zfs_handle_t **cb_datasets; | |
1079 | int cb_used; | |
1080 | int cb_alloc; | |
1081 | } mount_cbdata_t; | |
1082 | ||
1083 | static int | |
1084 | mount_cb(zfs_handle_t *zhp, void *data) | |
1085 | { | |
1086 | mount_cbdata_t *cbp = data; | |
1087 | ||
1088 | if (!(zfs_get_type(zhp) & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) { | |
1089 | zfs_close(zhp); | |
1090 | return (0); | |
1091 | } | |
1092 | ||
1093 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { | |
1094 | zfs_close(zhp); | |
1095 | return (0); | |
1096 | } | |
1097 | ||
1098 | if (cbp->cb_alloc == cbp->cb_used) { | |
1099 | void *ptr; | |
1100 | ||
1101 | if ((ptr = zfs_realloc(zhp->zfs_hdl, | |
1102 | cbp->cb_datasets, cbp->cb_alloc * sizeof (void *), | |
1103 | cbp->cb_alloc * 2 * sizeof (void *))) == NULL) | |
1104 | return (-1); | |
1105 | cbp->cb_datasets = ptr; | |
1106 | ||
1107 | cbp->cb_alloc *= 2; | |
1108 | } | |
1109 | ||
1110 | cbp->cb_datasets[cbp->cb_used++] = zhp; | |
1111 | ||
1112 | return (zfs_iter_filesystems(zhp, mount_cb, cbp)); | |
1113 | } | |
1114 | ||
1115 | static int | |
1116 | dataset_cmp(const void *a, const void *b) | |
1117 | { | |
1118 | zfs_handle_t **za = (zfs_handle_t **)a; | |
1119 | zfs_handle_t **zb = (zfs_handle_t **)b; | |
1120 | char mounta[MAXPATHLEN]; | |
1121 | char mountb[MAXPATHLEN]; | |
1122 | boolean_t gota, gotb; | |
1123 | ||
1124 | if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1125 | verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, | |
1126 | sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); | |
1127 | if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1128 | verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, | |
1129 | sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); | |
1130 | ||
1131 | if (gota && gotb) | |
1132 | return (strcmp(mounta, mountb)); | |
1133 | ||
1134 | if (gota) | |
1135 | return (-1); | |
1136 | if (gotb) | |
1137 | return (1); | |
1138 | ||
1139 | return (strcmp(zfs_get_name(a), zfs_get_name(b))); | |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | * Mount and share all datasets within the given pool. This assumes that no | |
1144 | * datasets within the pool are currently mounted. Because users can create | |
1145 | * complicated nested hierarchies of mountpoints, we first gather all the | |
1146 | * datasets and mountpoints within the pool, and sort them by mountpoint. Once | |
1147 | * we have the list of all filesystems, we iterate over them in order and mount | |
1148 | * and/or share each one. | |
1149 | */ | |
1150 | #pragma weak zpool_mount_datasets = zpool_enable_datasets | |
1151 | int | |
1152 | zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) | |
1153 | { | |
1154 | mount_cbdata_t cb = { 0 }; | |
1155 | libzfs_handle_t *hdl = zhp->zpool_hdl; | |
1156 | zfs_handle_t *zfsp; | |
1157 | int i, ret = -1; | |
1158 | int *good; | |
1159 | ||
1160 | /* | |
1161 | * Gather all non-snap datasets within the pool. | |
1162 | */ | |
1163 | if ((cb.cb_datasets = zfs_alloc(hdl, 4 * sizeof (void *))) == NULL) | |
1164 | return (-1); | |
1165 | cb.cb_alloc = 4; | |
1166 | ||
1167 | if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) | |
1168 | goto out; | |
1169 | ||
1170 | cb.cb_datasets[0] = zfsp; | |
1171 | cb.cb_used = 1; | |
1172 | ||
1173 | if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) | |
1174 | goto out; | |
1175 | ||
1176 | /* | |
1177 | * Sort the datasets by mountpoint. | |
1178 | */ | |
1179 | qsort(cb.cb_datasets, cb.cb_used, sizeof (void *), dataset_cmp); | |
1180 | ||
1181 | /* | |
1182 | * And mount all the datasets, keeping track of which ones | |
1183 | * succeeded or failed. By using zfs_alloc(), the good pointer | |
1184 | * will always be non-NULL. | |
1185 | */ | |
1186 | good = zfs_alloc(zhp->zpool_hdl, cb.cb_used * sizeof (int)); | |
1187 | ret = 0; | |
1188 | for (i = 0; i < cb.cb_used; i++) { | |
1189 | if (zfs_mount(cb.cb_datasets[i], mntopts, flags) != 0) | |
1190 | ret = -1; | |
1191 | else | |
1192 | good[i] = 1; | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Then share all the ones that need to be shared. This needs | |
1197 | * to be a separate pass in order to avoid excessive reloading | |
1198 | * of the configuration. Good should never be NULL since | |
1199 | * zfs_alloc is supposed to exit if memory isn't available. | |
1200 | */ | |
1201 | for (i = 0; i < cb.cb_used; i++) { | |
1202 | if (good[i] && zfs_share(cb.cb_datasets[i]) != 0) | |
1203 | ret = -1; | |
1204 | } | |
1205 | ||
1206 | free(good); | |
1207 | ||
1208 | out: | |
1209 | for (i = 0; i < cb.cb_used; i++) | |
1210 | zfs_close(cb.cb_datasets[i]); | |
1211 | free(cb.cb_datasets); | |
1212 | ||
1213 | return (ret); | |
1214 | } | |
1215 | ||
1216 | ||
1217 | static int | |
1218 | zvol_cb(const char *dataset, void *data) | |
1219 | { | |
1220 | libzfs_handle_t *hdl = data; | |
1221 | zfs_handle_t *zhp; | |
1222 | ||
1223 | /* | |
1224 | * Ignore snapshots and ignore failures from non-existant datasets. | |
1225 | */ | |
1226 | if (strchr(dataset, '@') != NULL || | |
1227 | (zhp = zfs_open(hdl, dataset, ZFS_TYPE_VOLUME)) == NULL) | |
1228 | return (0); | |
1229 | ||
1230 | if (zfs_unshare_iscsi(zhp) != 0) | |
1231 | return (-1); | |
1232 | ||
1233 | zfs_close(zhp); | |
1234 | ||
1235 | return (0); | |
1236 | } | |
1237 | ||
1238 | static int | |
1239 | mountpoint_compare(const void *a, const void *b) | |
1240 | { | |
1241 | const char *mounta = *((char **)a); | |
1242 | const char *mountb = *((char **)b); | |
1243 | ||
1244 | return (strcmp(mountb, mounta)); | |
1245 | } | |
1246 | ||
1247 | /* | |
1248 | * Unshare and unmount all datasets within the given pool. We don't want to | |
1249 | * rely on traversing the DSL to discover the filesystems within the pool, | |
1250 | * because this may be expensive (if not all of them are mounted), and can fail | |
1251 | * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and | |
1252 | * gather all the filesystems that are currently mounted. | |
1253 | */ | |
1254 | #pragma weak zpool_unmount_datasets = zpool_disable_datasets | |
1255 | int | |
1256 | zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) | |
1257 | { | |
1258 | int used, alloc; | |
1259 | struct mnttab entry; | |
1260 | size_t namelen; | |
1261 | char **mountpoints = NULL; | |
1262 | zfs_handle_t **datasets = NULL; | |
1263 | libzfs_handle_t *hdl = zhp->zpool_hdl; | |
1264 | int i; | |
1265 | int ret = -1; | |
1266 | int flags = (force ? MS_FORCE : 0); | |
1267 | ||
1268 | /* | |
1269 | * First unshare all zvols. | |
1270 | */ | |
1271 | if (zpool_iter_zvol(zhp, zvol_cb, hdl) != 0) | |
1272 | return (-1); | |
1273 | ||
1274 | namelen = strlen(zhp->zpool_name); | |
1275 | ||
1276 | rewind(hdl->libzfs_mnttab); | |
1277 | used = alloc = 0; | |
1278 | while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { | |
1279 | /* | |
1280 | * Ignore non-ZFS entries. | |
1281 | */ | |
1282 | if (entry.mnt_fstype == NULL || | |
1283 | strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) | |
1284 | continue; | |
1285 | ||
1286 | /* | |
1287 | * Ignore filesystems not within this pool. | |
1288 | */ | |
1289 | if (entry.mnt_mountp == NULL || | |
1290 | strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || | |
1291 | (entry.mnt_special[namelen] != '/' && | |
1292 | entry.mnt_special[namelen] != '\0')) | |
1293 | continue; | |
1294 | ||
1295 | /* | |
1296 | * At this point we've found a filesystem within our pool. Add | |
1297 | * it to our growing list. | |
1298 | */ | |
1299 | if (used == alloc) { | |
1300 | if (alloc == 0) { | |
1301 | if ((mountpoints = zfs_alloc(hdl, | |
1302 | 8 * sizeof (void *))) == NULL) | |
1303 | goto out; | |
1304 | ||
1305 | if ((datasets = zfs_alloc(hdl, | |
1306 | 8 * sizeof (void *))) == NULL) | |
1307 | goto out; | |
1308 | ||
1309 | alloc = 8; | |
1310 | } else { | |
1311 | void *ptr; | |
1312 | ||
1313 | if ((ptr = zfs_realloc(hdl, mountpoints, | |
1314 | alloc * sizeof (void *), | |
1315 | alloc * 2 * sizeof (void *))) == NULL) | |
1316 | goto out; | |
1317 | mountpoints = ptr; | |
1318 | ||
1319 | if ((ptr = zfs_realloc(hdl, datasets, | |
1320 | alloc * sizeof (void *), | |
1321 | alloc * 2 * sizeof (void *))) == NULL) | |
1322 | goto out; | |
1323 | datasets = ptr; | |
1324 | ||
1325 | alloc *= 2; | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | if ((mountpoints[used] = zfs_strdup(hdl, | |
1330 | entry.mnt_mountp)) == NULL) | |
1331 | goto out; | |
1332 | ||
1333 | /* | |
1334 | * This is allowed to fail, in case there is some I/O error. It | |
1335 | * is only used to determine if we need to remove the underlying | |
1336 | * mountpoint, so failure is not fatal. | |
1337 | */ | |
1338 | datasets[used] = make_dataset_handle(hdl, entry.mnt_special); | |
1339 | ||
1340 | used++; | |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * At this point, we have the entire list of filesystems, so sort it by | |
1345 | * mountpoint. | |
1346 | */ | |
1347 | qsort(mountpoints, used, sizeof (char *), mountpoint_compare); | |
1348 | ||
1349 | /* | |
1350 | * Walk through and first unshare everything. | |
1351 | */ | |
1352 | for (i = 0; i < used; i++) { | |
1353 | zfs_share_proto_t *curr_proto; | |
1354 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
1355 | curr_proto++) { | |
1356 | if (is_shared(hdl, mountpoints[i], *curr_proto) && | |
1357 | unshare_one(hdl, mountpoints[i], | |
1358 | mountpoints[i], *curr_proto) != 0) | |
1359 | goto out; | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | /* | |
1364 | * Now unmount everything, removing the underlying directories as | |
1365 | * appropriate. | |
1366 | */ | |
1367 | for (i = 0; i < used; i++) { | |
1368 | if (unmount_one(hdl, mountpoints[i], flags) != 0) | |
1369 | goto out; | |
1370 | } | |
1371 | ||
1372 | for (i = 0; i < used; i++) { | |
1373 | if (datasets[i]) | |
1374 | remove_mountpoint(datasets[i]); | |
1375 | } | |
1376 | ||
1377 | ret = 0; | |
1378 | out: | |
1379 | for (i = 0; i < used; i++) { | |
1380 | if (datasets[i]) | |
1381 | zfs_close(datasets[i]); | |
1382 | free(mountpoints[i]); | |
1383 | } | |
1384 | free(datasets); | |
1385 | free(mountpoints); | |
1386 | ||
1387 | return (ret); | |
1388 | } |