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.
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.
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]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2014 by Delphix. All rights reserved.
25 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
29 * Routines to manage ZFS mounts. We separate all the nasty routines that have
30 * to deal with the OS. The following functions are the main entry points --
31 * they are used by mount and unmount and when changing a filesystem's
39 * This file also contains the functions used to manage sharing filesystems via
52 * zfs_unshareall_nfs()
53 * zfs_unshareall_smb()
55 * zfs_unshareall_bypath()
57 * The following functions are available for pool consumers, and will
58 * mount/unmount and share/unshare all datasets within pool:
60 * zpool_enable_datasets()
61 * zpool_disable_datasets()
74 #include <sys/mntent.h>
75 #include <sys/mount.h>
80 #include "libzfs_impl.h"
83 #define MAXISALEN 257 /* based on sysinfo(2) man page */
85 static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *);
86 zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **,
90 * The share protocols table must be in the same order as the zfs_share_prot_t
91 * enum in libzfs_impl.h
100 proto_table_t proto_table[PROTO_END] = {
101 {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED},
102 {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED},
105 zfs_share_proto_t nfs_only[] = {
110 zfs_share_proto_t smb_only[] = {
114 zfs_share_proto_t share_all_proto[] = {
121 * Search the sharetab for the given mountpoint and protocol, returning
122 * a zfs_share_type_t value.
124 static zfs_share_type_t
125 is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto)
127 char buf[MAXPATHLEN], *tab;
130 if (hdl->libzfs_sharetab == NULL)
131 return (SHARED_NOT_SHARED);
133 (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET);
135 while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) {
137 /* the mountpoint is the first entry on each line */
138 if ((tab = strchr(buf, '\t')) == NULL)
142 if (strcmp(buf, mountpoint) == 0) {
145 * the protocol field is the third field
146 * skip over second field
149 if ((tab = strchr(ptr, '\t')) == NULL)
152 if ((tab = strchr(ptr, '\t')) == NULL)
156 proto_table[proto].p_name) == 0) {
167 if (proto == PROTO_NFS)
173 return (SHARED_NOT_SHARED);
178 * Returns true if the specified directory is empty. If we can't open the
179 * directory at all, return true so that the mount can fail with a more
180 * informative error message.
183 dir_is_empty(const char *dirname)
188 if ((dirp = opendir(dirname)) == NULL)
191 while ((dp = readdir64(dirp)) != NULL) {
193 if (strcmp(dp->d_name, ".") == 0 ||
194 strcmp(dp->d_name, "..") == 0)
197 (void) closedir(dirp);
201 (void) closedir(dirp);
207 * Checks to see if the mount is active. If the filesystem is mounted, we fill
208 * in 'where' with the current mountpoint, and return 1. Otherwise, we return
212 is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where)
216 if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0)
220 *where = zfs_strdup(zfs_hdl, entry.mnt_mountp);
226 zfs_is_mounted(zfs_handle_t *zhp, char **where)
228 return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where));
232 * Returns true if the given dataset is mountable, false otherwise. Returns the
233 * mountpoint in 'buf'.
236 zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen,
237 zprop_source_t *source)
239 char sourceloc[MAXNAMELEN];
240 zprop_source_t sourcetype;
242 if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type))
245 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen,
246 &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0);
248 if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 ||
249 strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0)
252 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF)
255 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) &&
256 getzoneid() == GLOBAL_ZONEID)
260 *source = sourcetype;
266 * Mount the given filesystem.
269 zfs_mount(zfs_handle_t *zhp, const char *options, int flags)
272 char mountpoint[ZFS_MAXPROPLEN];
273 char mntopts[MNT_LINE_MAX];
274 libzfs_handle_t *hdl = zhp->zfs_hdl;
279 (void) strlcpy(mntopts, options, sizeof (mntopts));
282 * If the pool is imported read-only then all mounts must be read-only
284 if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL))
287 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
290 /* Create the directory if it doesn't already exist */
291 if (lstat(mountpoint, &buf) != 0) {
292 if (mkdirp(mountpoint, 0755) != 0) {
293 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
294 "failed to create mountpoint"));
295 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
296 dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
301 #ifdef illumos /* FreeBSD: overlay mounts are not checked. */
303 * Determine if the mountpoint is empty. If so, refuse to perform the
304 * mount. We don't perform this check if MS_OVERLAY is specified, which
305 * would defeat the point. We also avoid this check if 'remount' is
308 if ((flags & MS_OVERLAY) == 0 &&
309 strstr(mntopts, MNTOPT_REMOUNT) == NULL &&
310 !dir_is_empty(mountpoint)) {
311 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
312 "directory is not empty"));
313 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
314 dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint));
318 /* perform the mount */
319 if (zmount(zfs_get_name(zhp), mountpoint, flags,
320 MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) {
322 * Generic errors are nasty, but there are just way too many
323 * from mount(), and they're well-understood. We pick a few
324 * common ones to improve upon.
326 if (errno == EBUSY) {
327 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
328 "mountpoint or dataset is busy"));
329 } else if (errno == EPERM) {
330 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
331 "Insufficient privileges"));
332 } else if (errno == ENOTSUP) {
336 VERIFY(zfs_spa_version(zhp, &spa_version) == 0);
337 (void) snprintf(buf, sizeof (buf),
338 dgettext(TEXT_DOMAIN, "Can't mount a version %lld "
339 "file system on a version %d pool. Pool must be"
340 " upgraded to mount this file system."),
341 (u_longlong_t)zfs_prop_get_int(zhp,
342 ZFS_PROP_VERSION), spa_version);
343 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf));
345 zfs_error_aux(hdl, strerror(errno));
347 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
348 dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
352 /* add the mounted entry into our cache */
353 libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint,
359 * Unmount a single filesystem.
362 unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags)
364 if (umount2(mountpoint, flags) != 0) {
365 zfs_error_aux(hdl, strerror(errno));
366 return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED,
367 dgettext(TEXT_DOMAIN, "cannot unmount '%s'"),
375 * Unmount the given filesystem.
378 zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags)
380 libzfs_handle_t *hdl = zhp->zfs_hdl;
384 /* check to see if we need to unmount the filesystem */
385 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
386 libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) {
388 * mountpoint may have come from a call to
389 * getmnt/getmntany if it isn't NULL. If it is NULL,
390 * we know it comes from libzfs_mnttab_find which can
391 * then get freed later. We strdup it to play it safe.
393 if (mountpoint == NULL)
394 mntpt = zfs_strdup(hdl, entry.mnt_mountp);
396 mntpt = zfs_strdup(hdl, mountpoint);
399 * Unshare and unmount the filesystem
401 if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0)
404 if (unmount_one(hdl, mntpt, flags) != 0) {
406 (void) zfs_shareall(zhp);
409 libzfs_mnttab_remove(hdl, zhp->zfs_name);
417 * Unmount this filesystem and any children inheriting the mountpoint property.
418 * To do this, just act like we're changing the mountpoint property, but don't
419 * remount the filesystems afterwards.
422 zfs_unmountall(zfs_handle_t *zhp, int flags)
424 prop_changelist_t *clp;
427 clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags);
431 ret = changelist_prefix(clp);
432 changelist_free(clp);
438 zfs_is_shared(zfs_handle_t *zhp)
440 zfs_share_type_t rc = 0;
441 zfs_share_proto_t *curr_proto;
443 if (ZFS_IS_VOLUME(zhp))
446 for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
448 rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto);
450 return (rc ? B_TRUE : B_FALSE);
454 zfs_share(zfs_handle_t *zhp)
456 assert(!ZFS_IS_VOLUME(zhp));
457 return (zfs_share_proto(zhp, share_all_proto));
461 zfs_unshare(zfs_handle_t *zhp)
463 assert(!ZFS_IS_VOLUME(zhp));
464 return (zfs_unshareall(zhp));
468 * Check to see if the filesystem is currently shared.
471 zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto)
476 if (!zfs_is_mounted(zhp, &mountpoint))
477 return (SHARED_NOT_SHARED);
479 if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto))
480 != SHARED_NOT_SHARED) {
488 return (SHARED_NOT_SHARED);
493 zfs_is_shared_nfs(zfs_handle_t *zhp, char **where)
495 return (zfs_is_shared_proto(zhp, where,
496 PROTO_NFS) != SHARED_NOT_SHARED);
500 zfs_is_shared_smb(zfs_handle_t *zhp, char **where)
502 return (zfs_is_shared_proto(zhp, where,
503 PROTO_SMB) != SHARED_NOT_SHARED);
507 * Make sure things will work if libshare isn't installed by using
508 * wrapper functions that check to see that the pointers to functions
509 * initialized in _zfs_init_libshare() are actually present.
513 static sa_handle_t (*_sa_init)(int);
514 static void (*_sa_fini)(sa_handle_t);
515 static sa_share_t (*_sa_find_share)(sa_handle_t, char *);
516 static int (*_sa_enable_share)(sa_share_t, char *);
517 static int (*_sa_disable_share)(sa_share_t, char *);
518 static char *(*_sa_errorstr)(int);
519 static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *);
520 static boolean_t (*_sa_needs_refresh)(sa_handle_t *);
521 static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t);
522 static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t,
523 char *, char *, zprop_source_t, char *, char *, char *);
524 static void (*_sa_update_sharetab_ts)(sa_handle_t);
528 * _zfs_init_libshare()
530 * Find the libshare.so.1 entry points that we use here and save the
531 * values to be used later. This is triggered by the runtime loader.
532 * Make sure the correct ISA version is loaded.
535 #pragma init(_zfs_init_libshare)
537 _zfs_init_libshare(void)
541 char path[MAXPATHLEN];
545 if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1)
550 (void) snprintf(path, MAXPATHLEN,
551 "/usr/lib/%s/libshare.so.1", isa);
553 if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) {
554 _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init");
555 _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini");
556 _sa_find_share = (sa_share_t (*)(sa_handle_t, char *))
557 dlsym(libshare, "sa_find_share");
558 _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
560 _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
562 _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr");
563 _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *))
564 dlsym(libshare, "sa_parse_legacy_options");
565 _sa_needs_refresh = (boolean_t (*)(sa_handle_t *))
566 dlsym(libshare, "sa_needs_refresh");
567 _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t))
568 dlsym(libshare, "sa_get_zfs_handle");
569 _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t,
570 sa_share_t, char *, char *, zprop_source_t, char *,
571 char *, char *))dlsym(libshare, "sa_zfs_process_share");
572 _sa_update_sharetab_ts = (void (*)(sa_handle_t))
573 dlsym(libshare, "sa_update_sharetab_ts");
574 if (_sa_init == NULL || _sa_fini == NULL ||
575 _sa_find_share == NULL || _sa_enable_share == NULL ||
576 _sa_disable_share == NULL || _sa_errorstr == NULL ||
577 _sa_parse_legacy_options == NULL ||
578 _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL ||
579 _sa_zfs_process_share == NULL ||
580 _sa_update_sharetab_ts == NULL) {
583 _sa_disable_share = NULL;
584 _sa_enable_share = NULL;
586 _sa_parse_legacy_options = NULL;
587 (void) dlclose(libshare);
588 _sa_needs_refresh = NULL;
589 _sa_get_zfs_handle = NULL;
590 _sa_zfs_process_share = NULL;
591 _sa_update_sharetab_ts = NULL;
598 * zfs_init_libshare(zhandle, service)
600 * Initialize the libshare API if it hasn't already been initialized.
601 * In all cases it returns 0 if it succeeded and an error if not. The
602 * service value is which part(s) of the API to initialize and is a
603 * direct map to the libshare sa_init(service) interface.
606 zfs_init_libshare(libzfs_handle_t *zhandle, int service)
611 if (_sa_init == NULL)
614 if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) {
616 * We had a cache miss. Most likely it is a new ZFS
617 * dataset that was just created. We want to make sure
618 * so check timestamps to see if a different process
619 * has updated any of the configuration. If there was
620 * some non-ZFS change, we need to re-initialize the
623 zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS;
624 if (_sa_needs_refresh != NULL &&
625 _sa_needs_refresh(zhandle->libzfs_sharehdl)) {
626 zfs_uninit_libshare(zhandle);
627 zhandle->libzfs_sharehdl = _sa_init(service);
631 if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL)
632 zhandle->libzfs_sharehdl = _sa_init(service);
634 if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL)
642 * zfs_uninit_libshare(zhandle)
644 * Uninitialize the libshare API if it hasn't already been
645 * uninitialized. It is OK to call multiple times.
648 zfs_uninit_libshare(libzfs_handle_t *zhandle)
650 if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) {
652 if (_sa_fini != NULL)
653 _sa_fini(zhandle->libzfs_sharehdl);
655 zhandle->libzfs_sharehdl = NULL;
660 * zfs_parse_options(options, proto)
662 * Call the legacy parse interface to get the protocol specific
663 * options using the NULL arg to indicate that this is a "parse" only.
666 zfs_parse_options(char *options, zfs_share_proto_t proto)
669 if (_sa_parse_legacy_options != NULL) {
670 return (_sa_parse_legacy_options(NULL, options,
671 proto_table[proto].p_name));
673 return (SA_CONFIG_ERR);
681 * zfs_sa_find_share(handle, path)
683 * wrapper around sa_find_share to find a share path in the
687 zfs_sa_find_share(sa_handle_t handle, char *path)
689 if (_sa_find_share != NULL)
690 return (_sa_find_share(handle, path));
695 * zfs_sa_enable_share(share, proto)
697 * Wrapper for sa_enable_share which enables a share for a specified
701 zfs_sa_enable_share(sa_share_t share, char *proto)
703 if (_sa_enable_share != NULL)
704 return (_sa_enable_share(share, proto));
705 return (SA_CONFIG_ERR);
709 * zfs_sa_disable_share(share, proto)
711 * Wrapper for sa_enable_share which disables a share for a specified
715 zfs_sa_disable_share(sa_share_t share, char *proto)
717 if (_sa_disable_share != NULL)
718 return (_sa_disable_share(share, proto));
719 return (SA_CONFIG_ERR);
724 * Share the given filesystem according to the options in the specified
725 * protocol specific properties (sharenfs, sharesmb). We rely
726 * on "libshare" to the dirty work for us.
729 zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
731 char mountpoint[ZFS_MAXPROPLEN];
732 char shareopts[ZFS_MAXPROPLEN];
733 char sourcestr[ZFS_MAXPROPLEN];
734 libzfs_handle_t *hdl = zhp->zfs_hdl;
735 zfs_share_proto_t *curr_proto;
736 zprop_source_t sourcetype;
739 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
742 for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) {
744 * Return success if there are no share options.
746 if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop,
747 shareopts, sizeof (shareopts), &sourcetype, sourcestr,
748 ZFS_MAXPROPLEN, B_FALSE) != 0 ||
749 strcmp(shareopts, "off") == 0)
753 ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API);
755 (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
756 dgettext(TEXT_DOMAIN, "cannot share '%s': %s"),
757 zfs_get_name(zhp), _sa_errorstr != NULL ?
758 _sa_errorstr(ret) : "");
764 * If the 'zoned' property is set, then zfs_is_mountable()
765 * will have already bailed out if we are in the global zone.
766 * But local zones cannot be NFS servers, so we ignore it for
767 * local zones as well.
769 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED))
773 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint);
776 * This may be a new file system that was just
777 * created so isn't in the internal cache
778 * (second time through). Rather than
779 * reloading the entire configuration, we can
780 * assume ZFS has done the checking and it is
781 * safe to add this to the internal
784 if (_sa_zfs_process_share(hdl->libzfs_sharehdl,
785 NULL, NULL, mountpoint,
786 proto_table[*curr_proto].p_name, sourcetype,
787 shareopts, sourcestr, zhp->zfs_name) != SA_OK) {
788 (void) zfs_error_fmt(hdl,
789 proto_table[*curr_proto].p_share_err,
790 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
794 hdl->libzfs_shareflags |= ZFSSHARE_MISS;
795 share = zfs_sa_find_share(hdl->libzfs_sharehdl,
800 err = zfs_sa_enable_share(share,
801 proto_table[*curr_proto].p_name);
803 (void) zfs_error_fmt(hdl,
804 proto_table[*curr_proto].p_share_err,
805 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
811 if (*curr_proto != PROTO_NFS) {
812 fprintf(stderr, "Unsupported share protocol: %d.\n",
817 if (strcmp(shareopts, "on") == 0)
818 error = fsshare(ZFS_EXPORTS_PATH, mountpoint, "");
820 error = fsshare(ZFS_EXPORTS_PATH, mountpoint, shareopts);
824 (void) zfs_error_fmt(hdl,
825 proto_table[*curr_proto].p_share_err,
826 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
837 zfs_share_nfs(zfs_handle_t *zhp)
839 return (zfs_share_proto(zhp, nfs_only));
843 zfs_share_smb(zfs_handle_t *zhp)
845 return (zfs_share_proto(zhp, smb_only));
849 zfs_shareall(zfs_handle_t *zhp)
851 return (zfs_share_proto(zhp, share_all_proto));
855 * Unshare a filesystem by mountpoint.
858 unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint,
859 zfs_share_proto_t proto)
866 * Mountpoint could get trashed if libshare calls getmntany
867 * which it does during API initialization, so strdup the
870 mntpt = zfs_strdup(hdl, mountpoint);
872 /* make sure libshare initialized */
873 if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) {
874 free(mntpt); /* don't need the copy anymore */
875 return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
876 dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"),
877 name, _sa_errorstr(err)));
880 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt);
881 free(mntpt); /* don't need the copy anymore */
884 err = zfs_sa_disable_share(share, proto_table[proto].p_name);
886 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
887 dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"),
888 name, _sa_errorstr(err)));
891 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
892 dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"),
896 char buf[MAXPATHLEN];
900 if (proto != PROTO_NFS) {
901 fprintf(stderr, "No SMB support in FreeBSD yet.\n");
905 err = fsunshare(ZFS_EXPORTS_PATH, mountpoint);
907 zfs_error_aux(hdl, "%s", strerror(err));
908 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
909 dgettext(TEXT_DOMAIN,
910 "cannot unshare '%s'"), name));
917 * Unshare the given filesystem.
920 zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint,
921 zfs_share_proto_t *proto)
923 libzfs_handle_t *hdl = zhp->zfs_hdl;
927 /* check to see if need to unmount the filesystem */
928 rewind(zhp->zfs_hdl->libzfs_mnttab);
929 if (mountpoint != NULL)
930 mountpoint = mntpt = zfs_strdup(hdl, mountpoint);
932 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
933 libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) {
934 zfs_share_proto_t *curr_proto;
936 if (mountpoint == NULL)
937 mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp);
939 for (curr_proto = proto; *curr_proto != PROTO_END;
942 if (is_shared(hdl, mntpt, *curr_proto) &&
943 unshare_one(hdl, zhp->zfs_name,
944 mntpt, *curr_proto) != 0) {
958 zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint)
960 return (zfs_unshare_proto(zhp, mountpoint, nfs_only));
964 zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint)
966 return (zfs_unshare_proto(zhp, mountpoint, smb_only));
970 * Same as zfs_unmountall(), but for NFS and SMB unshares.
973 zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
975 prop_changelist_t *clp;
978 clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0);
982 ret = changelist_unshare(clp, proto);
983 changelist_free(clp);
989 zfs_unshareall_nfs(zfs_handle_t *zhp)
991 return (zfs_unshareall_proto(zhp, nfs_only));
995 zfs_unshareall_smb(zfs_handle_t *zhp)
997 return (zfs_unshareall_proto(zhp, smb_only));
1001 zfs_unshareall(zfs_handle_t *zhp)
1003 return (zfs_unshareall_proto(zhp, share_all_proto));
1007 zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint)
1009 return (zfs_unshare_proto(zhp, mountpoint, share_all_proto));
1013 * Remove the mountpoint associated with the current dataset, if necessary.
1014 * We only remove the underlying directory if:
1016 * - The mountpoint is not 'none' or 'legacy'
1017 * - The mountpoint is non-empty
1018 * - The mountpoint is the default or inherited
1019 * - The 'zoned' property is set, or we're in a local zone
1021 * Any other directories we leave alone.
1024 remove_mountpoint(zfs_handle_t *zhp)
1026 char mountpoint[ZFS_MAXPROPLEN];
1027 zprop_source_t source;
1029 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint),
1033 if (source == ZPROP_SRC_DEFAULT ||
1034 source == ZPROP_SRC_INHERITED) {
1036 * Try to remove the directory, silently ignoring any errors.
1037 * The filesystem may have since been removed or moved around,
1038 * and this error isn't really useful to the administrator in
1041 (void) rmdir(mountpoint);
1046 libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp)
1048 if (cbp->cb_alloc == cbp->cb_used) {
1052 newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64;
1053 ptr = zfs_realloc(zhp->zfs_hdl,
1054 cbp->cb_handles, cbp->cb_alloc * sizeof (void *),
1055 newsz * sizeof (void *));
1056 cbp->cb_handles = ptr;
1057 cbp->cb_alloc = newsz;
1059 cbp->cb_handles[cbp->cb_used++] = zhp;
1063 mount_cb(zfs_handle_t *zhp, void *data)
1065 get_all_cb_t *cbp = data;
1067 if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) {
1072 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) {
1078 * If this filesystem is inconsistent and has a receive resume
1079 * token, we can not mount it.
1081 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) &&
1082 zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN,
1083 NULL, 0, NULL, NULL, 0, B_TRUE) == 0) {
1088 libzfs_add_handle(cbp, zhp);
1089 if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) {
1097 libzfs_dataset_cmp(const void *a, const void *b)
1099 zfs_handle_t **za = (zfs_handle_t **)a;
1100 zfs_handle_t **zb = (zfs_handle_t **)b;
1101 char mounta[MAXPATHLEN];
1102 char mountb[MAXPATHLEN];
1103 boolean_t gota, gotb;
1105 if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
1106 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
1107 sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
1108 if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
1109 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
1110 sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
1113 return (strcmp(mounta, mountb));
1120 return (strcmp(zfs_get_name(a), zfs_get_name(b)));
1124 * Mount and share all datasets within the given pool. This assumes that no
1125 * datasets within the pool are currently mounted. Because users can create
1126 * complicated nested hierarchies of mountpoints, we first gather all the
1127 * datasets and mountpoints within the pool, and sort them by mountpoint. Once
1128 * we have the list of all filesystems, we iterate over them in order and mount
1129 * and/or share each one.
1131 #pragma weak zpool_mount_datasets = zpool_enable_datasets
1133 zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
1135 get_all_cb_t cb = { 0 };
1136 libzfs_handle_t *hdl = zhp->zpool_hdl;
1142 * Gather all non-snap datasets within the pool.
1144 if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL)
1147 libzfs_add_handle(&cb, zfsp);
1148 if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0)
1151 * Sort the datasets by mountpoint.
1153 qsort(cb.cb_handles, cb.cb_used, sizeof (void *),
1154 libzfs_dataset_cmp);
1157 * And mount all the datasets, keeping track of which ones
1158 * succeeded or failed.
1160 if ((good = zfs_alloc(zhp->zpool_hdl,
1161 cb.cb_used * sizeof (int))) == NULL)
1165 for (i = 0; i < cb.cb_used; i++) {
1166 if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0)
1173 * Then share all the ones that need to be shared. This needs
1174 * to be a separate pass in order to avoid excessive reloading
1175 * of the configuration. Good should never be NULL since
1176 * zfs_alloc is supposed to exit if memory isn't available.
1178 for (i = 0; i < cb.cb_used; i++) {
1179 if (good[i] && zfs_share(cb.cb_handles[i]) != 0)
1186 for (i = 0; i < cb.cb_used; i++)
1187 zfs_close(cb.cb_handles[i]);
1188 free(cb.cb_handles);
1194 mountpoint_compare(const void *a, const void *b)
1196 const char *mounta = *((char **)a);
1197 const char *mountb = *((char **)b);
1199 return (strcmp(mountb, mounta));
1202 /* alias for 2002/240 */
1203 #pragma weak zpool_unmount_datasets = zpool_disable_datasets
1205 * Unshare and unmount all datasets within the given pool. We don't want to
1206 * rely on traversing the DSL to discover the filesystems within the pool,
1207 * because this may be expensive (if not all of them are mounted), and can fail
1208 * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and
1209 * gather all the filesystems that are currently mounted.
1212 zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
1215 struct mnttab entry;
1217 char **mountpoints = NULL;
1218 zfs_handle_t **datasets = NULL;
1219 libzfs_handle_t *hdl = zhp->zpool_hdl;
1222 int flags = (force ? MS_FORCE : 0);
1224 namelen = strlen(zhp->zpool_name);
1226 rewind(hdl->libzfs_mnttab);
1228 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
1230 * Ignore non-ZFS entries.
1232 if (entry.mnt_fstype == NULL ||
1233 strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
1237 * Ignore filesystems not within this pool.
1239 if (entry.mnt_mountp == NULL ||
1240 strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 ||
1241 (entry.mnt_special[namelen] != '/' &&
1242 entry.mnt_special[namelen] != '\0'))
1246 * At this point we've found a filesystem within our pool. Add
1247 * it to our growing list.
1249 if (used == alloc) {
1251 if ((mountpoints = zfs_alloc(hdl,
1252 8 * sizeof (void *))) == NULL)
1255 if ((datasets = zfs_alloc(hdl,
1256 8 * sizeof (void *))) == NULL)
1263 if ((ptr = zfs_realloc(hdl, mountpoints,
1264 alloc * sizeof (void *),
1265 alloc * 2 * sizeof (void *))) == NULL)
1269 if ((ptr = zfs_realloc(hdl, datasets,
1270 alloc * sizeof (void *),
1271 alloc * 2 * sizeof (void *))) == NULL)
1279 if ((mountpoints[used] = zfs_strdup(hdl,
1280 entry.mnt_mountp)) == NULL)
1284 * This is allowed to fail, in case there is some I/O error. It
1285 * is only used to determine if we need to remove the underlying
1286 * mountpoint, so failure is not fatal.
1288 datasets[used] = make_dataset_handle(hdl, entry.mnt_special);
1294 * At this point, we have the entire list of filesystems, so sort it by
1297 qsort(mountpoints, used, sizeof (char *), mountpoint_compare);
1300 * Walk through and first unshare everything.
1302 for (i = 0; i < used; i++) {
1303 zfs_share_proto_t *curr_proto;
1304 for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
1306 if (is_shared(hdl, mountpoints[i], *curr_proto) &&
1307 unshare_one(hdl, mountpoints[i],
1308 mountpoints[i], *curr_proto) != 0)
1314 * Now unmount everything, removing the underlying directories as
1317 for (i = 0; i < used; i++) {
1318 if (unmount_one(hdl, mountpoints[i], flags) != 0)
1322 for (i = 0; i < used; i++) {
1324 remove_mountpoint(datasets[i]);
1329 for (i = 0; i < used; i++) {
1331 zfs_close(datasets[i]);
1332 free(mountpoints[i]);