]>
Commit | Line | Data |
---|---|---|
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 | ||
27 | #pragma ident "@(#)libzfs_mount.c 1.25 08/03/04 SMI" | |
28 | ||
29 | /* | |
30 | * Routines to manage ZFS mounts. We separate all the nasty routines that have | |
31 | * to deal with the OS. The following functions are the main entry points -- | |
32 | * they are used by mount and unmount and when changing a filesystem's | |
33 | * mountpoint. | |
34 | * | |
35 | * zfs_is_mounted() | |
36 | * zfs_mount() | |
37 | * zfs_unmount() | |
38 | * zfs_unmountall() | |
39 | * | |
40 | * This file also contains the functions used to manage sharing filesystems via | |
41 | * NFS and iSCSI: | |
42 | * | |
43 | * zfs_is_shared() | |
44 | * zfs_share() | |
45 | * zfs_unshare() | |
46 | * | |
47 | * zfs_is_shared_nfs() | |
48 | * zfs_is_shared_smb() | |
49 | * zfs_is_shared_iscsi() | |
50 | * zfs_share_proto() | |
51 | * zfs_shareall(); | |
52 | * zfs_share_iscsi() | |
53 | * zfs_unshare_nfs() | |
54 | * zfs_unshare_smb() | |
55 | * zfs_unshareall_nfs() | |
56 | * zfs_unshareall_smb() | |
57 | * zfs_unshareall() | |
58 | * zfs_unshareall_bypath() | |
59 | * zfs_unshare_iscsi() | |
60 | * | |
61 | * The following functions are available for pool consumers, and will | |
62 | * mount/unmount and share/unshare all datasets within pool: | |
63 | * | |
64 | * zpool_enable_datasets() | |
65 | * zpool_disable_datasets() | |
66 | */ | |
67 | ||
68 | #include <dirent.h> | |
69 | #include <dlfcn.h> | |
70 | #include <errno.h> | |
71 | #include <libgen.h> | |
72 | #include <libintl.h> | |
73 | #include <stdio.h> | |
74 | #include <stdlib.h> | |
75 | #include <strings.h> | |
76 | #include <unistd.h> | |
77 | #include <zone.h> | |
78 | #include <sys/mntent.h> | |
79 | #include <sys/mnttab.h> | |
80 | #include <sys/mount.h> | |
81 | #include <sys/stat.h> | |
82 | ||
83 | #include <libzfs.h> | |
84 | ||
85 | #include "libzfs_impl.h" | |
86 | ||
87 | #include <libshare.h> | |
88 | #include <sys/systeminfo.h> | |
89 | #define MAXISALEN 257 /* based on sysinfo(2) man page */ | |
90 | ||
91 | static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); | |
92 | zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, | |
93 | zfs_share_proto_t); | |
94 | ||
95 | static int (*iscsitgt_zfs_share)(const char *); | |
96 | static int (*iscsitgt_zfs_unshare)(const char *); | |
97 | static int (*iscsitgt_zfs_is_shared)(const char *); | |
98 | static int (*iscsitgt_svc_online)(); | |
99 | ||
100 | /* | |
101 | * The share protocols table must be in the same order as the zfs_share_prot_t | |
102 | * enum in libzfs_impl.h | |
103 | */ | |
104 | typedef struct { | |
105 | zfs_prop_t p_prop; | |
106 | char *p_name; | |
107 | int p_share_err; | |
108 | int p_unshare_err; | |
109 | } proto_table_t; | |
110 | ||
111 | proto_table_t proto_table[PROTO_END] = { | |
112 | {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, | |
113 | {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, | |
114 | }; | |
115 | ||
116 | zfs_share_proto_t nfs_only[] = { | |
117 | PROTO_NFS, | |
118 | PROTO_END | |
119 | }; | |
120 | ||
121 | zfs_share_proto_t smb_only[] = { | |
122 | PROTO_SMB, | |
123 | PROTO_END | |
124 | }; | |
125 | zfs_share_proto_t share_all_proto[] = { | |
126 | PROTO_NFS, | |
127 | PROTO_SMB, | |
128 | PROTO_END | |
129 | }; | |
130 | ||
131 | #pragma init(zfs_iscsi_init) | |
132 | static void | |
133 | zfs_iscsi_init(void) | |
134 | { | |
135 | void *libiscsitgt; | |
136 | ||
137 | if ((libiscsitgt = dlopen("/lib/libiscsitgt.so.1", | |
138 | RTLD_LAZY | RTLD_GLOBAL)) == NULL || | |
139 | (iscsitgt_zfs_share = (int (*)(const char *))dlsym(libiscsitgt, | |
140 | "iscsitgt_zfs_share")) == NULL || | |
141 | (iscsitgt_zfs_unshare = (int (*)(const char *))dlsym(libiscsitgt, | |
142 | "iscsitgt_zfs_unshare")) == NULL || | |
143 | (iscsitgt_zfs_is_shared = (int (*)(const char *))dlsym(libiscsitgt, | |
144 | "iscsitgt_zfs_is_shared")) == NULL || | |
145 | (iscsitgt_svc_online = (int (*)(const char *))dlsym(libiscsitgt, | |
146 | "iscsitgt_svc_online")) == NULL) { | |
147 | iscsitgt_zfs_share = NULL; | |
148 | iscsitgt_zfs_unshare = NULL; | |
149 | iscsitgt_zfs_is_shared = NULL; | |
150 | iscsitgt_svc_online = NULL; | |
151 | } | |
152 | } | |
153 | ||
154 | /* | |
155 | * Search the sharetab for the given mountpoint and protocol, returning | |
156 | * a zfs_share_type_t value. | |
157 | */ | |
158 | static zfs_share_type_t | |
159 | is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) | |
160 | { | |
161 | char buf[MAXPATHLEN], *tab; | |
162 | char *ptr; | |
163 | ||
164 | if (hdl->libzfs_sharetab == NULL) | |
165 | return (SHARED_NOT_SHARED); | |
166 | ||
167 | (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); | |
168 | ||
169 | while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { | |
170 | ||
171 | /* the mountpoint is the first entry on each line */ | |
172 | if ((tab = strchr(buf, '\t')) == NULL) | |
173 | continue; | |
174 | ||
175 | *tab = '\0'; | |
176 | if (strcmp(buf, mountpoint) == 0) { | |
177 | /* | |
178 | * the protocol field is the third field | |
179 | * skip over second field | |
180 | */ | |
181 | ptr = ++tab; | |
182 | if ((tab = strchr(ptr, '\t')) == NULL) | |
183 | continue; | |
184 | ptr = ++tab; | |
185 | if ((tab = strchr(ptr, '\t')) == NULL) | |
186 | continue; | |
187 | *tab = '\0'; | |
188 | if (strcmp(ptr, | |
189 | proto_table[proto].p_name) == 0) { | |
190 | switch (proto) { | |
191 | case PROTO_NFS: | |
192 | return (SHARED_NFS); | |
193 | case PROTO_SMB: | |
194 | return (SHARED_SMB); | |
195 | default: | |
196 | return (0); | |
197 | } | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
202 | return (SHARED_NOT_SHARED); | |
203 | } | |
204 | ||
205 | /* | |
206 | * Returns true if the specified directory is empty. If we can't open the | |
207 | * directory at all, return true so that the mount can fail with a more | |
208 | * informative error message. | |
209 | */ | |
210 | static boolean_t | |
211 | dir_is_empty(const char *dirname) | |
212 | { | |
213 | DIR *dirp; | |
214 | struct dirent64 *dp; | |
215 | ||
216 | if ((dirp = opendir(dirname)) == NULL) | |
217 | return (B_TRUE); | |
218 | ||
219 | while ((dp = readdir64(dirp)) != NULL) { | |
220 | ||
221 | if (strcmp(dp->d_name, ".") == 0 || | |
222 | strcmp(dp->d_name, "..") == 0) | |
223 | continue; | |
224 | ||
225 | (void) closedir(dirp); | |
226 | return (B_FALSE); | |
227 | } | |
228 | ||
229 | (void) closedir(dirp); | |
230 | return (B_TRUE); | |
231 | } | |
232 | ||
233 | /* | |
234 | * Checks to see if the mount is active. If the filesystem is mounted, we fill | |
235 | * in 'where' with the current mountpoint, and return 1. Otherwise, we return | |
236 | * 0. | |
237 | */ | |
238 | boolean_t | |
239 | is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) | |
240 | { | |
241 | struct mnttab search = { 0 }, entry; | |
242 | ||
243 | /* | |
244 | * Search for the entry in /etc/mnttab. We don't bother getting the | |
245 | * mountpoint, as we can just search for the special device. This will | |
246 | * also let us find mounts when the mountpoint is 'legacy'. | |
247 | */ | |
248 | search.mnt_special = (char *)special; | |
249 | search.mnt_fstype = MNTTYPE_ZFS; | |
250 | ||
251 | rewind(zfs_hdl->libzfs_mnttab); | |
252 | if (getmntany(zfs_hdl->libzfs_mnttab, &entry, &search) != 0) | |
253 | return (B_FALSE); | |
254 | ||
255 | if (where != NULL) | |
256 | *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); | |
257 | ||
258 | return (B_TRUE); | |
259 | } | |
260 | ||
261 | boolean_t | |
262 | zfs_is_mounted(zfs_handle_t *zhp, char **where) | |
263 | { | |
264 | return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); | |
265 | } | |
266 | ||
267 | /* | |
268 | * Returns true if the given dataset is mountable, false otherwise. Returns the | |
269 | * mountpoint in 'buf'. | |
270 | */ | |
271 | static boolean_t | |
272 | zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, | |
273 | zprop_source_t *source) | |
274 | { | |
275 | char sourceloc[ZFS_MAXNAMELEN]; | |
276 | zprop_source_t sourcetype; | |
277 | ||
278 | if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) | |
279 | return (B_FALSE); | |
280 | ||
281 | verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, | |
282 | &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); | |
283 | ||
284 | if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || | |
285 | strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) | |
286 | return (B_FALSE); | |
287 | ||
288 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) | |
289 | return (B_FALSE); | |
290 | ||
291 | if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && | |
292 | getzoneid() == GLOBAL_ZONEID) | |
293 | return (B_FALSE); | |
294 | ||
295 | if (source) | |
296 | *source = sourcetype; | |
297 | ||
298 | return (B_TRUE); | |
299 | } | |
300 | ||
301 | /* | |
302 | * Mount the given filesystem. | |
303 | */ | |
304 | int | |
305 | zfs_mount(zfs_handle_t *zhp, const char *options, int flags) | |
306 | { | |
307 | struct stat buf; | |
308 | char mountpoint[ZFS_MAXPROPLEN]; | |
309 | char mntopts[MNT_LINE_MAX]; | |
310 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
311 | ||
312 | if (options == NULL) | |
313 | mntopts[0] = '\0'; | |
314 | else | |
315 | (void) strlcpy(mntopts, options, sizeof (mntopts)); | |
316 | ||
317 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) | |
318 | return (0); | |
319 | ||
320 | /* Create the directory if it doesn't already exist */ | |
321 | if (lstat(mountpoint, &buf) != 0) { | |
322 | if (mkdirp(mountpoint, 0755) != 0) { | |
323 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
324 | "failed to create mountpoint")); | |
325 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
326 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
327 | mountpoint)); | |
328 | } | |
329 | } | |
330 | ||
331 | /* | |
332 | * Determine if the mountpoint is empty. If so, refuse to perform the | |
333 | * mount. We don't perform this check if MS_OVERLAY is specified, which | |
334 | * would defeat the point. We also avoid this check if 'remount' is | |
335 | * specified. | |
336 | */ | |
337 | if ((flags & MS_OVERLAY) == 0 && | |
338 | strstr(mntopts, MNTOPT_REMOUNT) == NULL && | |
339 | !dir_is_empty(mountpoint)) { | |
340 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
341 | "directory is not empty")); | |
342 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
343 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); | |
344 | } | |
345 | ||
346 | /* perform the mount */ | |
347 | if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, | |
348 | MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { | |
349 | /* | |
350 | * Generic errors are nasty, but there are just way too many | |
351 | * from mount(), and they're well-understood. We pick a few | |
352 | * common ones to improve upon. | |
353 | */ | |
354 | if (errno == EBUSY) { | |
355 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
356 | "mountpoint or dataset is busy")); | |
357 | } else if (errno == EPERM) { | |
358 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
359 | "Insufficient privileges")); | |
360 | } else { | |
361 | zfs_error_aux(hdl, strerror(errno)); | |
362 | } | |
363 | ||
364 | return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, | |
365 | dgettext(TEXT_DOMAIN, "cannot mount '%s'"), | |
366 | zhp->zfs_name)); | |
367 | } | |
368 | ||
369 | return (0); | |
370 | } | |
371 | ||
372 | /* | |
373 | * Unmount a single filesystem. | |
374 | */ | |
375 | static int | |
376 | unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) | |
377 | { | |
378 | if (umount2(mountpoint, flags) != 0) { | |
379 | zfs_error_aux(hdl, strerror(errno)); | |
380 | return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, | |
381 | dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), | |
382 | mountpoint)); | |
383 | } | |
384 | ||
385 | return (0); | |
386 | } | |
387 | ||
388 | /* | |
389 | * Unmount the given filesystem. | |
390 | */ | |
391 | int | |
392 | zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) | |
393 | { | |
394 | struct mnttab search = { 0 }, entry; | |
395 | char *mntpt = NULL; | |
396 | ||
397 | /* check to see if need to unmount the filesystem */ | |
398 | search.mnt_special = zhp->zfs_name; | |
399 | search.mnt_fstype = MNTTYPE_ZFS; | |
400 | rewind(zhp->zfs_hdl->libzfs_mnttab); | |
401 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && | |
402 | getmntany(zhp->zfs_hdl->libzfs_mnttab, &entry, &search) == 0)) { | |
403 | ||
404 | /* | |
405 | * mountpoint may have come from a call to | |
406 | * getmnt/getmntany if it isn't NULL. If it is NULL, | |
407 | * we know it comes from getmntany which can then get | |
408 | * overwritten later. We strdup it to play it safe. | |
409 | */ | |
410 | if (mountpoint == NULL) | |
411 | mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); | |
412 | else | |
413 | mntpt = zfs_strdup(zhp->zfs_hdl, mountpoint); | |
414 | ||
415 | /* | |
416 | * Unshare and unmount the filesystem | |
417 | */ | |
418 | if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) | |
419 | return (-1); | |
420 | ||
421 | if (unmount_one(zhp->zfs_hdl, mntpt, flags) != 0) { | |
422 | free(mntpt); | |
423 | (void) zfs_shareall(zhp); | |
424 | return (-1); | |
425 | } | |
426 | free(mntpt); | |
427 | } | |
428 | ||
429 | return (0); | |
430 | } | |
431 | ||
432 | /* | |
433 | * Unmount this filesystem and any children inheriting the mountpoint property. | |
434 | * To do this, just act like we're changing the mountpoint property, but don't | |
435 | * remount the filesystems afterwards. | |
436 | */ | |
437 | int | |
438 | zfs_unmountall(zfs_handle_t *zhp, int flags) | |
439 | { | |
440 | prop_changelist_t *clp; | |
441 | int ret; | |
442 | ||
443 | clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, flags); | |
444 | if (clp == NULL) | |
445 | return (-1); | |
446 | ||
447 | ret = changelist_prefix(clp); | |
448 | changelist_free(clp); | |
449 | ||
450 | return (ret); | |
451 | } | |
452 | ||
453 | boolean_t | |
454 | zfs_is_shared(zfs_handle_t *zhp) | |
455 | { | |
456 | zfs_share_type_t rc = 0; | |
457 | zfs_share_proto_t *curr_proto; | |
458 | ||
459 | if (ZFS_IS_VOLUME(zhp)) | |
460 | return (zfs_is_shared_iscsi(zhp)); | |
461 | ||
462 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
463 | curr_proto++) | |
464 | rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); | |
465 | ||
466 | return (rc ? B_TRUE : B_FALSE); | |
467 | } | |
468 | ||
469 | int | |
470 | zfs_share(zfs_handle_t *zhp) | |
471 | { | |
472 | if (ZFS_IS_VOLUME(zhp)) | |
473 | return (zfs_share_iscsi(zhp)); | |
474 | ||
475 | return (zfs_share_proto(zhp, share_all_proto)); | |
476 | } | |
477 | ||
478 | int | |
479 | zfs_unshare(zfs_handle_t *zhp) | |
480 | { | |
481 | if (ZFS_IS_VOLUME(zhp)) | |
482 | return (zfs_unshare_iscsi(zhp)); | |
483 | ||
484 | return (zfs_unshareall(zhp)); | |
485 | } | |
486 | ||
487 | /* | |
488 | * Check to see if the filesystem is currently shared. | |
489 | */ | |
490 | zfs_share_type_t | |
491 | zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) | |
492 | { | |
493 | char *mountpoint; | |
494 | zfs_share_type_t rc; | |
495 | ||
496 | if (!zfs_is_mounted(zhp, &mountpoint)) | |
497 | return (SHARED_NOT_SHARED); | |
498 | ||
499 | if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) { | |
500 | if (where != NULL) | |
501 | *where = mountpoint; | |
502 | else | |
503 | free(mountpoint); | |
504 | return (rc); | |
505 | } else { | |
506 | free(mountpoint); | |
507 | return (SHARED_NOT_SHARED); | |
508 | } | |
509 | } | |
510 | ||
511 | boolean_t | |
512 | zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) | |
513 | { | |
514 | return (zfs_is_shared_proto(zhp, where, | |
515 | PROTO_NFS) != SHARED_NOT_SHARED); | |
516 | } | |
517 | ||
518 | boolean_t | |
519 | zfs_is_shared_smb(zfs_handle_t *zhp, char **where) | |
520 | { | |
521 | return (zfs_is_shared_proto(zhp, where, | |
522 | PROTO_SMB) != SHARED_NOT_SHARED); | |
523 | } | |
524 | ||
525 | /* | |
526 | * Make sure things will work if libshare isn't installed by using | |
527 | * wrapper functions that check to see that the pointers to functions | |
528 | * initialized in _zfs_init_libshare() are actually present. | |
529 | */ | |
530 | ||
531 | static sa_handle_t (*_sa_init)(int); | |
532 | static void (*_sa_fini)(sa_handle_t); | |
533 | static sa_share_t (*_sa_find_share)(sa_handle_t, char *); | |
534 | static int (*_sa_enable_share)(sa_share_t, char *); | |
535 | static int (*_sa_disable_share)(sa_share_t, char *); | |
536 | static char *(*_sa_errorstr)(int); | |
537 | static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); | |
538 | static boolean_t (*_sa_needs_refresh)(sa_handle_t *); | |
539 | static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); | |
540 | static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, | |
541 | char *, char *, zprop_source_t, char *, char *, char *); | |
542 | static void (*_sa_update_sharetab_ts)(sa_handle_t); | |
543 | ||
544 | /* | |
545 | * _zfs_init_libshare() | |
546 | * | |
547 | * Find the libshare.so.1 entry points that we use here and save the | |
548 | * values to be used later. This is triggered by the runtime loader. | |
549 | * Make sure the correct ISA version is loaded. | |
550 | */ | |
551 | ||
552 | #pragma init(_zfs_init_libshare) | |
553 | static void | |
554 | _zfs_init_libshare(void) | |
555 | { | |
556 | void *libshare; | |
557 | char path[MAXPATHLEN]; | |
558 | char isa[MAXISALEN]; | |
559 | ||
560 | #if defined(_LP64) | |
561 | if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) | |
562 | isa[0] = '\0'; | |
563 | #else | |
564 | isa[0] = '\0'; | |
565 | #endif | |
566 | (void) snprintf(path, MAXPATHLEN, | |
567 | "/usr/lib/%s/libshare.so.1", isa); | |
568 | ||
569 | if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { | |
570 | _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); | |
571 | _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); | |
572 | _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) | |
573 | dlsym(libshare, "sa_find_share"); | |
574 | _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, | |
575 | "sa_enable_share"); | |
576 | _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, | |
577 | "sa_disable_share"); | |
578 | _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); | |
579 | _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) | |
580 | dlsym(libshare, "sa_parse_legacy_options"); | |
581 | _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) | |
582 | dlsym(libshare, "sa_needs_refresh"); | |
583 | _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) | |
584 | dlsym(libshare, "sa_get_zfs_handle"); | |
585 | _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, | |
586 | sa_share_t, char *, char *, zprop_source_t, char *, | |
587 | char *, char *))dlsym(libshare, "sa_zfs_process_share"); | |
588 | _sa_update_sharetab_ts = (void (*)(sa_handle_t)) | |
589 | dlsym(libshare, "sa_update_sharetab_ts"); | |
590 | if (_sa_init == NULL || _sa_fini == NULL || | |
591 | _sa_find_share == NULL || _sa_enable_share == NULL || | |
592 | _sa_disable_share == NULL || _sa_errorstr == NULL || | |
593 | _sa_parse_legacy_options == NULL || | |
594 | _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || | |
595 | _sa_zfs_process_share == NULL || | |
596 | _sa_update_sharetab_ts == NULL) { | |
597 | _sa_init = NULL; | |
598 | _sa_fini = NULL; | |
599 | _sa_disable_share = NULL; | |
600 | _sa_enable_share = NULL; | |
601 | _sa_errorstr = NULL; | |
602 | _sa_parse_legacy_options = NULL; | |
603 | (void) dlclose(libshare); | |
604 | _sa_needs_refresh = NULL; | |
605 | _sa_get_zfs_handle = NULL; | |
606 | _sa_zfs_process_share = NULL; | |
607 | _sa_update_sharetab_ts = NULL; | |
608 | } | |
609 | } | |
610 | } | |
611 | ||
612 | /* | |
613 | * zfs_init_libshare(zhandle, service) | |
614 | * | |
615 | * Initialize the libshare API if it hasn't already been initialized. | |
616 | * In all cases it returns 0 if it succeeded and an error if not. The | |
617 | * service value is which part(s) of the API to initialize and is a | |
618 | * direct map to the libshare sa_init(service) interface. | |
619 | */ | |
620 | int | |
621 | zfs_init_libshare(libzfs_handle_t *zhandle, int service) | |
622 | { | |
623 | int ret = SA_OK; | |
624 | ||
625 | if (_sa_init == NULL) | |
626 | ret = SA_CONFIG_ERR; | |
627 | ||
628 | if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) { | |
629 | /* | |
630 | * We had a cache miss. Most likely it is a new ZFS | |
631 | * dataset that was just created. We want to make sure | |
632 | * so check timestamps to see if a different process | |
633 | * has updated any of the configuration. If there was | |
634 | * some non-ZFS change, we need to re-initialize the | |
635 | * internal cache. | |
636 | */ | |
637 | zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS; | |
638 | if (_sa_needs_refresh != NULL && | |
639 | _sa_needs_refresh(zhandle->libzfs_sharehdl)) { | |
640 | zfs_uninit_libshare(zhandle); | |
641 | zhandle->libzfs_sharehdl = _sa_init(service); | |
642 | } | |
643 | } | |
644 | ||
645 | if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) | |
646 | zhandle->libzfs_sharehdl = _sa_init(service); | |
647 | ||
648 | if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) | |
649 | ret = SA_NO_MEMORY; | |
650 | ||
651 | return (ret); | |
652 | } | |
653 | ||
654 | /* | |
655 | * zfs_uninit_libshare(zhandle) | |
656 | * | |
657 | * Uninitialize the libshare API if it hasn't already been | |
658 | * uninitialized. It is OK to call multiple times. | |
659 | */ | |
660 | void | |
661 | zfs_uninit_libshare(libzfs_handle_t *zhandle) | |
662 | { | |
663 | if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { | |
664 | if (_sa_fini != NULL) | |
665 | _sa_fini(zhandle->libzfs_sharehdl); | |
666 | zhandle->libzfs_sharehdl = NULL; | |
667 | } | |
668 | } | |
669 | ||
670 | /* | |
671 | * zfs_parse_options(options, proto) | |
672 | * | |
673 | * Call the legacy parse interface to get the protocol specific | |
674 | * options using the NULL arg to indicate that this is a "parse" only. | |
675 | */ | |
676 | int | |
677 | zfs_parse_options(char *options, zfs_share_proto_t proto) | |
678 | { | |
679 | if (_sa_parse_legacy_options != NULL) { | |
680 | return (_sa_parse_legacy_options(NULL, options, | |
681 | proto_table[proto].p_name)); | |
682 | } | |
683 | return (SA_CONFIG_ERR); | |
684 | } | |
685 | ||
686 | /* | |
687 | * zfs_sa_find_share(handle, path) | |
688 | * | |
689 | * wrapper around sa_find_share to find a share path in the | |
690 | * configuration. | |
691 | */ | |
692 | static sa_share_t | |
693 | zfs_sa_find_share(sa_handle_t handle, char *path) | |
694 | { | |
695 | if (_sa_find_share != NULL) | |
696 | return (_sa_find_share(handle, path)); | |
697 | return (NULL); | |
698 | } | |
699 | ||
700 | /* | |
701 | * zfs_sa_enable_share(share, proto) | |
702 | * | |
703 | * Wrapper for sa_enable_share which enables a share for a specified | |
704 | * protocol. | |
705 | */ | |
706 | static int | |
707 | zfs_sa_enable_share(sa_share_t share, char *proto) | |
708 | { | |
709 | if (_sa_enable_share != NULL) | |
710 | return (_sa_enable_share(share, proto)); | |
711 | return (SA_CONFIG_ERR); | |
712 | } | |
713 | ||
714 | /* | |
715 | * zfs_sa_disable_share(share, proto) | |
716 | * | |
717 | * Wrapper for sa_enable_share which disables a share for a specified | |
718 | * protocol. | |
719 | */ | |
720 | static int | |
721 | zfs_sa_disable_share(sa_share_t share, char *proto) | |
722 | { | |
723 | if (_sa_disable_share != NULL) | |
724 | return (_sa_disable_share(share, proto)); | |
725 | return (SA_CONFIG_ERR); | |
726 | } | |
727 | ||
728 | /* | |
729 | * Share the given filesystem according to the options in the specified | |
730 | * protocol specific properties (sharenfs, sharesmb). We rely | |
731 | * on "libshare" to the dirty work for us. | |
732 | */ | |
733 | static int | |
734 | zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
735 | { | |
736 | char mountpoint[ZFS_MAXPROPLEN]; | |
737 | char shareopts[ZFS_MAXPROPLEN]; | |
738 | char sourcestr[ZFS_MAXPROPLEN]; | |
739 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
740 | sa_share_t share; | |
741 | zfs_share_proto_t *curr_proto; | |
742 | zprop_source_t sourcetype; | |
743 | int ret; | |
744 | ||
745 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) | |
746 | return (0); | |
747 | ||
748 | if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
749 | (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
750 | dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), | |
751 | zfs_get_name(zhp), _sa_errorstr != NULL ? | |
752 | _sa_errorstr(ret) : ""); | |
753 | return (-1); | |
754 | } | |
755 | ||
756 | for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { | |
757 | /* | |
758 | * Return success if there are no share options. | |
759 | */ | |
760 | if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, | |
761 | shareopts, sizeof (shareopts), &sourcetype, sourcestr, | |
762 | ZFS_MAXPROPLEN, B_FALSE) != 0 || | |
763 | strcmp(shareopts, "off") == 0) | |
764 | continue; | |
765 | ||
766 | /* | |
767 | * If the 'zoned' property is set, then zfs_is_mountable() | |
768 | * will have already bailed out if we are in the global zone. | |
769 | * But local zones cannot be NFS servers, so we ignore it for | |
770 | * local zones as well. | |
771 | */ | |
772 | if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) | |
773 | continue; | |
774 | ||
775 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); | |
776 | if (share == NULL) { | |
777 | /* | |
778 | * This may be a new file system that was just | |
779 | * created so isn't in the internal cache | |
780 | * (second time through). Rather than | |
781 | * reloading the entire configuration, we can | |
782 | * assume ZFS has done the checking and it is | |
783 | * safe to add this to the internal | |
784 | * configuration. | |
785 | */ | |
786 | if (_sa_zfs_process_share(hdl->libzfs_sharehdl, | |
787 | NULL, NULL, mountpoint, | |
788 | proto_table[*curr_proto].p_name, sourcetype, | |
789 | shareopts, sourcestr, zhp->zfs_name) != SA_OK) { | |
790 | (void) zfs_error_fmt(hdl, | |
791 | proto_table[*curr_proto].p_share_err, | |
792 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
793 | zfs_get_name(zhp)); | |
794 | return (-1); | |
795 | } | |
796 | hdl->libzfs_shareflags |= ZFSSHARE_MISS; | |
797 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, | |
798 | mountpoint); | |
799 | } | |
800 | if (share != NULL) { | |
801 | int err; | |
802 | err = zfs_sa_enable_share(share, | |
803 | proto_table[*curr_proto].p_name); | |
804 | if (err != SA_OK) { | |
805 | (void) zfs_error_fmt(hdl, | |
806 | proto_table[*curr_proto].p_share_err, | |
807 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
808 | zfs_get_name(zhp)); | |
809 | return (-1); | |
810 | } | |
811 | } else { | |
812 | (void) zfs_error_fmt(hdl, | |
813 | proto_table[*curr_proto].p_share_err, | |
814 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), | |
815 | zfs_get_name(zhp)); | |
816 | return (-1); | |
817 | } | |
818 | ||
819 | } | |
820 | return (0); | |
821 | } | |
822 | ||
823 | ||
824 | int | |
825 | zfs_share_nfs(zfs_handle_t *zhp) | |
826 | { | |
827 | return (zfs_share_proto(zhp, nfs_only)); | |
828 | } | |
829 | ||
830 | int | |
831 | zfs_share_smb(zfs_handle_t *zhp) | |
832 | { | |
833 | return (zfs_share_proto(zhp, smb_only)); | |
834 | } | |
835 | ||
836 | int | |
837 | zfs_shareall(zfs_handle_t *zhp) | |
838 | { | |
839 | return (zfs_share_proto(zhp, share_all_proto)); | |
840 | } | |
841 | ||
842 | /* | |
843 | * Unshare a filesystem by mountpoint. | |
844 | */ | |
845 | static int | |
846 | unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, | |
847 | zfs_share_proto_t proto) | |
848 | { | |
849 | sa_share_t share; | |
850 | int err; | |
851 | char *mntpt; | |
852 | /* | |
853 | * Mountpoint could get trashed if libshare calls getmntany | |
854 | * which id does during API initialization, so strdup the | |
855 | * value. | |
856 | */ | |
857 | mntpt = zfs_strdup(hdl, mountpoint); | |
858 | ||
859 | /* make sure libshare initialized */ | |
860 | if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { | |
861 | free(mntpt); /* don't need the copy anymore */ | |
862 | return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, | |
863 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
864 | name, _sa_errorstr(err))); | |
865 | } | |
866 | ||
867 | share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); | |
868 | free(mntpt); /* don't need the copy anymore */ | |
869 | ||
870 | if (share != NULL) { | |
871 | err = zfs_sa_disable_share(share, proto_table[proto].p_name); | |
872 | if (err != SA_OK) { | |
873 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
874 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), | |
875 | name, _sa_errorstr(err))); | |
876 | } | |
877 | } else { | |
878 | return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, | |
879 | dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), | |
880 | name)); | |
881 | } | |
882 | return (0); | |
883 | } | |
884 | ||
885 | /* | |
886 | * Unshare the given filesystem. | |
887 | */ | |
888 | int | |
889 | zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, | |
890 | zfs_share_proto_t *proto) | |
891 | { | |
892 | struct mnttab search = { 0 }, entry; | |
893 | char *mntpt = NULL; | |
894 | ||
895 | /* check to see if need to unmount the filesystem */ | |
896 | search.mnt_special = (char *)zfs_get_name(zhp); | |
897 | search.mnt_fstype = MNTTYPE_ZFS; | |
898 | rewind(zhp->zfs_hdl->libzfs_mnttab); | |
899 | if (mountpoint != NULL) | |
900 | mntpt = zfs_strdup(zhp->zfs_hdl, mountpoint); | |
901 | ||
902 | if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && | |
903 | getmntany(zhp->zfs_hdl->libzfs_mnttab, &entry, &search) == 0)) { | |
904 | zfs_share_proto_t *curr_proto; | |
905 | ||
906 | if (mountpoint == NULL) | |
907 | mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); | |
908 | ||
909 | for (curr_proto = proto; *curr_proto != PROTO_END; | |
910 | curr_proto++) { | |
911 | ||
912 | if (is_shared(zhp->zfs_hdl, mntpt, *curr_proto) && | |
913 | unshare_one(zhp->zfs_hdl, zhp->zfs_name, | |
914 | mntpt, *curr_proto) != 0) { | |
915 | if (mntpt != NULL) | |
916 | free(mntpt); | |
917 | return (-1); | |
918 | } | |
919 | } | |
920 | } | |
921 | if (mntpt != NULL) | |
922 | free(mntpt); | |
923 | ||
924 | return (0); | |
925 | } | |
926 | ||
927 | int | |
928 | zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) | |
929 | { | |
930 | return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); | |
931 | } | |
932 | ||
933 | int | |
934 | zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) | |
935 | { | |
936 | return (zfs_unshare_proto(zhp, mountpoint, smb_only)); | |
937 | } | |
938 | ||
939 | /* | |
940 | * Same as zfs_unmountall(), but for NFS and SMB unshares. | |
941 | */ | |
942 | int | |
943 | zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) | |
944 | { | |
945 | prop_changelist_t *clp; | |
946 | int ret; | |
947 | ||
948 | clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0); | |
949 | if (clp == NULL) | |
950 | return (-1); | |
951 | ||
952 | ret = changelist_unshare(clp, proto); | |
953 | changelist_free(clp); | |
954 | ||
955 | return (ret); | |
956 | } | |
957 | ||
958 | int | |
959 | zfs_unshareall_nfs(zfs_handle_t *zhp) | |
960 | { | |
961 | return (zfs_unshareall_proto(zhp, nfs_only)); | |
962 | } | |
963 | ||
964 | int | |
965 | zfs_unshareall_smb(zfs_handle_t *zhp) | |
966 | { | |
967 | return (zfs_unshareall_proto(zhp, smb_only)); | |
968 | } | |
969 | ||
970 | int | |
971 | zfs_unshareall(zfs_handle_t *zhp) | |
972 | { | |
973 | return (zfs_unshareall_proto(zhp, share_all_proto)); | |
974 | } | |
975 | ||
976 | int | |
977 | zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) | |
978 | { | |
979 | return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); | |
980 | } | |
981 | ||
982 | /* | |
983 | * Remove the mountpoint associated with the current dataset, if necessary. | |
984 | * We only remove the underlying directory if: | |
985 | * | |
986 | * - The mountpoint is not 'none' or 'legacy' | |
987 | * - The mountpoint is non-empty | |
988 | * - The mountpoint is the default or inherited | |
989 | * - The 'zoned' property is set, or we're in a local zone | |
990 | * | |
991 | * Any other directories we leave alone. | |
992 | */ | |
993 | void | |
994 | remove_mountpoint(zfs_handle_t *zhp) | |
995 | { | |
996 | char mountpoint[ZFS_MAXPROPLEN]; | |
997 | zprop_source_t source; | |
998 | ||
999 | if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), | |
1000 | &source)) | |
1001 | return; | |
1002 | ||
1003 | if (source == ZPROP_SRC_DEFAULT || | |
1004 | source == ZPROP_SRC_INHERITED) { | |
1005 | /* | |
1006 | * Try to remove the directory, silently ignoring any errors. | |
1007 | * The filesystem may have since been removed or moved around, | |
1008 | * and this error isn't really useful to the administrator in | |
1009 | * any way. | |
1010 | */ | |
1011 | (void) rmdir(mountpoint); | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | boolean_t | |
1016 | zfs_is_shared_iscsi(zfs_handle_t *zhp) | |
1017 | { | |
1018 | ||
1019 | /* | |
1020 | * If iscsi deamon isn't running then we aren't shared | |
1021 | */ | |
1022 | if (iscsitgt_svc_online && iscsitgt_svc_online() == 1) | |
1023 | return (B_FALSE); | |
1024 | else | |
1025 | return (iscsitgt_zfs_is_shared != NULL && | |
1026 | iscsitgt_zfs_is_shared(zhp->zfs_name) != 0); | |
1027 | } | |
1028 | ||
1029 | int | |
1030 | zfs_share_iscsi(zfs_handle_t *zhp) | |
1031 | { | |
1032 | char shareopts[ZFS_MAXPROPLEN]; | |
1033 | const char *dataset = zhp->zfs_name; | |
1034 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
1035 | ||
1036 | /* | |
1037 | * Return success if there are no share options. | |
1038 | */ | |
1039 | if (zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts, | |
1040 | sizeof (shareopts), NULL, NULL, 0, B_FALSE) != 0 || | |
1041 | strcmp(shareopts, "off") == 0) | |
1042 | return (0); | |
1043 | ||
1044 | if (iscsitgt_zfs_share == NULL || iscsitgt_zfs_share(dataset) != 0) { | |
1045 | int error = EZFS_SHAREISCSIFAILED; | |
1046 | ||
1047 | /* | |
1048 | * If service isn't availabele and EPERM was | |
1049 | * returned then use special error. | |
1050 | */ | |
1051 | if (iscsitgt_svc_online && errno == EPERM && | |
1052 | (iscsitgt_svc_online() != 0)) | |
1053 | error = EZFS_ISCSISVCUNAVAIL; | |
1054 | ||
1055 | return (zfs_error_fmt(hdl, error, | |
1056 | dgettext(TEXT_DOMAIN, "cannot share '%s'"), dataset)); | |
1057 | } | |
1058 | ||
1059 | return (0); | |
1060 | } | |
1061 | ||
1062 | int | |
1063 | zfs_unshare_iscsi(zfs_handle_t *zhp) | |
1064 | { | |
1065 | const char *dataset = zfs_get_name(zhp); | |
1066 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
1067 | ||
1068 | /* | |
1069 | * Return if the volume is not shared | |
1070 | */ | |
1071 | if (zfs_is_shared_iscsi(zhp) != SHARED_ISCSI) | |
1072 | return (0); | |
1073 | ||
1074 | /* | |
1075 | * If this fails with ENODEV it indicates that zvol wasn't shared so | |
1076 | * we should return success in that case. | |
1077 | */ | |
1078 | if (iscsitgt_zfs_unshare == NULL || | |
1079 | (iscsitgt_zfs_unshare(dataset) != 0 && errno != ENODEV)) { | |
1080 | if (errno == EPERM) | |
1081 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1082 | "Insufficient privileges to unshare iscsi")); | |
1083 | return (zfs_error_fmt(hdl, EZFS_UNSHAREISCSIFAILED, | |
1084 | dgettext(TEXT_DOMAIN, "cannot unshare '%s'"), dataset)); | |
1085 | } | |
1086 | ||
1087 | return (0); | |
1088 | } | |
1089 | ||
1090 | typedef struct mount_cbdata { | |
1091 | zfs_handle_t **cb_datasets; | |
1092 | int cb_used; | |
1093 | int cb_alloc; | |
1094 | } mount_cbdata_t; | |
1095 | ||
1096 | static int | |
1097 | mount_cb(zfs_handle_t *zhp, void *data) | |
1098 | { | |
1099 | mount_cbdata_t *cbp = data; | |
1100 | ||
1101 | if (!(zfs_get_type(zhp) & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) { | |
1102 | zfs_close(zhp); | |
1103 | return (0); | |
1104 | } | |
1105 | ||
1106 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { | |
1107 | zfs_close(zhp); | |
1108 | return (0); | |
1109 | } | |
1110 | ||
1111 | if (cbp->cb_alloc == cbp->cb_used) { | |
1112 | void *ptr; | |
1113 | ||
1114 | if ((ptr = zfs_realloc(zhp->zfs_hdl, | |
1115 | cbp->cb_datasets, cbp->cb_alloc * sizeof (void *), | |
1116 | cbp->cb_alloc * 2 * sizeof (void *))) == NULL) | |
1117 | return (-1); | |
1118 | cbp->cb_datasets = ptr; | |
1119 | ||
1120 | cbp->cb_alloc *= 2; | |
1121 | } | |
1122 | ||
1123 | cbp->cb_datasets[cbp->cb_used++] = zhp; | |
1124 | ||
1125 | return (zfs_iter_filesystems(zhp, mount_cb, cbp)); | |
1126 | } | |
1127 | ||
1128 | static int | |
1129 | dataset_cmp(const void *a, const void *b) | |
1130 | { | |
1131 | zfs_handle_t **za = (zfs_handle_t **)a; | |
1132 | zfs_handle_t **zb = (zfs_handle_t **)b; | |
1133 | char mounta[MAXPATHLEN]; | |
1134 | char mountb[MAXPATHLEN]; | |
1135 | boolean_t gota, gotb; | |
1136 | ||
1137 | if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1138 | verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, | |
1139 | sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); | |
1140 | if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) | |
1141 | verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, | |
1142 | sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); | |
1143 | ||
1144 | if (gota && gotb) | |
1145 | return (strcmp(mounta, mountb)); | |
1146 | ||
1147 | if (gota) | |
1148 | return (-1); | |
1149 | if (gotb) | |
1150 | return (1); | |
1151 | ||
1152 | return (strcmp(zfs_get_name(a), zfs_get_name(b))); | |
1153 | } | |
1154 | ||
1155 | /* | |
1156 | * Mount and share all datasets within the given pool. This assumes that no | |
1157 | * datasets within the pool are currently mounted. Because users can create | |
1158 | * complicated nested hierarchies of mountpoints, we first gather all the | |
1159 | * datasets and mountpoints within the pool, and sort them by mountpoint. Once | |
1160 | * we have the list of all filesystems, we iterate over them in order and mount | |
1161 | * and/or share each one. | |
1162 | */ | |
1163 | #pragma weak zpool_mount_datasets = zpool_enable_datasets | |
1164 | int | |
1165 | zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) | |
1166 | { | |
1167 | mount_cbdata_t cb = { 0 }; | |
1168 | libzfs_handle_t *hdl = zhp->zpool_hdl; | |
1169 | zfs_handle_t *zfsp; | |
1170 | int i, ret = -1; | |
1171 | int *good; | |
1172 | ||
1173 | /* | |
1174 | * Gather all non-snap datasets within the pool. | |
1175 | */ | |
1176 | if ((cb.cb_datasets = zfs_alloc(hdl, 4 * sizeof (void *))) == NULL) | |
1177 | return (-1); | |
1178 | cb.cb_alloc = 4; | |
1179 | ||
1180 | if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) | |
1181 | goto out; | |
1182 | ||
1183 | cb.cb_datasets[0] = zfsp; | |
1184 | cb.cb_used = 1; | |
1185 | ||
1186 | if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) | |
1187 | goto out; | |
1188 | ||
1189 | /* | |
1190 | * Sort the datasets by mountpoint. | |
1191 | */ | |
1192 | qsort(cb.cb_datasets, cb.cb_used, sizeof (void *), dataset_cmp); | |
1193 | ||
1194 | /* | |
1195 | * And mount all the datasets, keeping track of which ones | |
1196 | * succeeded or failed. By using zfs_alloc(), the good pointer | |
1197 | * will always be non-NULL. | |
1198 | */ | |
1199 | good = zfs_alloc(zhp->zpool_hdl, cb.cb_used * sizeof (int)); | |
1200 | ret = 0; | |
1201 | for (i = 0; i < cb.cb_used; i++) { | |
1202 | if (zfs_mount(cb.cb_datasets[i], mntopts, flags) != 0) | |
1203 | ret = -1; | |
1204 | else | |
1205 | good[i] = 1; | |
1206 | } | |
1207 | ||
1208 | /* | |
1209 | * Then share all the ones that need to be shared. This needs | |
1210 | * to be a separate pass in order to avoid excessive reloading | |
1211 | * of the configuration. Good should never be NULL since | |
1212 | * zfs_alloc is supposed to exit if memory isn't available. | |
1213 | */ | |
1214 | for (i = 0; i < cb.cb_used; i++) { | |
1215 | if (good[i] && zfs_share(cb.cb_datasets[i]) != 0) | |
1216 | ret = -1; | |
1217 | } | |
1218 | ||
1219 | free(good); | |
1220 | ||
1221 | out: | |
1222 | for (i = 0; i < cb.cb_used; i++) | |
1223 | zfs_close(cb.cb_datasets[i]); | |
1224 | free(cb.cb_datasets); | |
1225 | ||
1226 | return (ret); | |
1227 | } | |
1228 | ||
1229 | ||
1230 | static int | |
1231 | zvol_cb(const char *dataset, void *data) | |
1232 | { | |
1233 | libzfs_handle_t *hdl = data; | |
1234 | zfs_handle_t *zhp; | |
1235 | ||
1236 | /* | |
1237 | * Ignore snapshots and ignore failures from non-existant datasets. | |
1238 | */ | |
1239 | if (strchr(dataset, '@') != NULL || | |
1240 | (zhp = zfs_open(hdl, dataset, ZFS_TYPE_VOLUME)) == NULL) | |
1241 | return (0); | |
1242 | ||
1243 | if (zfs_unshare_iscsi(zhp) != 0) | |
1244 | return (-1); | |
1245 | ||
1246 | zfs_close(zhp); | |
1247 | ||
1248 | return (0); | |
1249 | } | |
1250 | ||
1251 | static int | |
1252 | mountpoint_compare(const void *a, const void *b) | |
1253 | { | |
1254 | const char *mounta = *((char **)a); | |
1255 | const char *mountb = *((char **)b); | |
1256 | ||
1257 | return (strcmp(mountb, mounta)); | |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * Unshare and unmount all datasets within the given pool. We don't want to | |
1262 | * rely on traversing the DSL to discover the filesystems within the pool, | |
1263 | * because this may be expensive (if not all of them are mounted), and can fail | |
1264 | * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and | |
1265 | * gather all the filesystems that are currently mounted. | |
1266 | */ | |
1267 | #pragma weak zpool_unmount_datasets = zpool_disable_datasets | |
1268 | int | |
1269 | zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) | |
1270 | { | |
1271 | int used, alloc; | |
1272 | struct mnttab entry; | |
1273 | size_t namelen; | |
1274 | char **mountpoints = NULL; | |
1275 | zfs_handle_t **datasets = NULL; | |
1276 | libzfs_handle_t *hdl = zhp->zpool_hdl; | |
1277 | int i; | |
1278 | int ret = -1; | |
1279 | int flags = (force ? MS_FORCE : 0); | |
1280 | ||
1281 | /* | |
1282 | * First unshare all zvols. | |
1283 | */ | |
1284 | if (zpool_iter_zvol(zhp, zvol_cb, hdl) != 0) | |
1285 | return (-1); | |
1286 | ||
1287 | namelen = strlen(zhp->zpool_name); | |
1288 | ||
1289 | rewind(hdl->libzfs_mnttab); | |
1290 | used = alloc = 0; | |
1291 | while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { | |
1292 | /* | |
1293 | * Ignore non-ZFS entries. | |
1294 | */ | |
1295 | if (entry.mnt_fstype == NULL || | |
1296 | strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) | |
1297 | continue; | |
1298 | ||
1299 | /* | |
1300 | * Ignore filesystems not within this pool. | |
1301 | */ | |
1302 | if (entry.mnt_mountp == NULL || | |
1303 | strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || | |
1304 | (entry.mnt_special[namelen] != '/' && | |
1305 | entry.mnt_special[namelen] != '\0')) | |
1306 | continue; | |
1307 | ||
1308 | /* | |
1309 | * At this point we've found a filesystem within our pool. Add | |
1310 | * it to our growing list. | |
1311 | */ | |
1312 | if (used == alloc) { | |
1313 | if (alloc == 0) { | |
1314 | if ((mountpoints = zfs_alloc(hdl, | |
1315 | 8 * sizeof (void *))) == NULL) | |
1316 | goto out; | |
1317 | ||
1318 | if ((datasets = zfs_alloc(hdl, | |
1319 | 8 * sizeof (void *))) == NULL) | |
1320 | goto out; | |
1321 | ||
1322 | alloc = 8; | |
1323 | } else { | |
1324 | void *ptr; | |
1325 | ||
1326 | if ((ptr = zfs_realloc(hdl, mountpoints, | |
1327 | alloc * sizeof (void *), | |
1328 | alloc * 2 * sizeof (void *))) == NULL) | |
1329 | goto out; | |
1330 | mountpoints = ptr; | |
1331 | ||
1332 | if ((ptr = zfs_realloc(hdl, datasets, | |
1333 | alloc * sizeof (void *), | |
1334 | alloc * 2 * sizeof (void *))) == NULL) | |
1335 | goto out; | |
1336 | datasets = ptr; | |
1337 | ||
1338 | alloc *= 2; | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | if ((mountpoints[used] = zfs_strdup(hdl, | |
1343 | entry.mnt_mountp)) == NULL) | |
1344 | goto out; | |
1345 | ||
1346 | /* | |
1347 | * This is allowed to fail, in case there is some I/O error. It | |
1348 | * is only used to determine if we need to remove the underlying | |
1349 | * mountpoint, so failure is not fatal. | |
1350 | */ | |
1351 | datasets[used] = make_dataset_handle(hdl, entry.mnt_special); | |
1352 | ||
1353 | used++; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * At this point, we have the entire list of filesystems, so sort it by | |
1358 | * mountpoint. | |
1359 | */ | |
1360 | qsort(mountpoints, used, sizeof (char *), mountpoint_compare); | |
1361 | ||
1362 | /* | |
1363 | * Walk through and first unshare everything. | |
1364 | */ | |
1365 | for (i = 0; i < used; i++) { | |
1366 | zfs_share_proto_t *curr_proto; | |
1367 | for (curr_proto = share_all_proto; *curr_proto != PROTO_END; | |
1368 | curr_proto++) { | |
1369 | if (is_shared(hdl, mountpoints[i], *curr_proto) && | |
1370 | unshare_one(hdl, mountpoints[i], | |
1371 | mountpoints[i], *curr_proto) != 0) | |
1372 | goto out; | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * Now unmount everything, removing the underlying directories as | |
1378 | * appropriate. | |
1379 | */ | |
1380 | for (i = 0; i < used; i++) { | |
1381 | if (unmount_one(hdl, mountpoints[i], flags) != 0) | |
1382 | goto out; | |
1383 | } | |
1384 | ||
1385 | for (i = 0; i < used; i++) { | |
1386 | if (datasets[i]) | |
1387 | remove_mountpoint(datasets[i]); | |
1388 | } | |
1389 | ||
1390 | ret = 0; | |
1391 | out: | |
1392 | for (i = 0; i < used; i++) { | |
1393 | if (datasets[i]) | |
1394 | zfs_close(datasets[i]); | |
1395 | free(mountpoints[i]); | |
1396 | } | |
1397 | free(datasets); | |
1398 | free(mountpoints); | |
1399 | ||
1400 | return (ret); | |
1401 | } |