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 2015 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
25 * Copyright (c) 2014 by Delphix. All rights reserved.
26 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
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
40 * This file also contains the functions used to manage sharing filesystems via
53 * zfs_unshareall_nfs()
54 * zfs_unshareall_smb()
56 * zfs_unshareall_bypath()
58 * The following functions are available for pool consumers, and will
59 * mount/unmount and share/unshare all datasets within pool:
61 * zpool_enable_datasets()
62 * zpool_disable_datasets()
75 #include <sys/mntent.h>
76 #include <sys/mount.h>
81 #include "libzfs_impl.h"
84 #define MAXISALEN 257 /* based on sysinfo(2) man page */
86 static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *);
87 zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **,
91 * The share protocols table must be in the same order as the zfs_share_prot_t
92 * enum in libzfs_impl.h
101 proto_table_t proto_table[PROTO_END] = {
102 {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED},
103 {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED},
106 zfs_share_proto_t nfs_only[] = {
111 zfs_share_proto_t smb_only[] = {
115 zfs_share_proto_t share_all_proto[] = {
122 * Search the sharetab for the given mountpoint and protocol, returning
123 * a zfs_share_type_t value.
125 static zfs_share_type_t
126 is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto)
128 char buf[MAXPATHLEN], *tab;
131 if (hdl->libzfs_sharetab == NULL)
132 return (SHARED_NOT_SHARED);
134 (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET);
136 while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) {
138 /* the mountpoint is the first entry on each line */
139 if ((tab = strchr(buf, '\t')) == NULL)
143 if (strcmp(buf, mountpoint) == 0) {
146 * the protocol field is the third field
147 * skip over second field
150 if ((tab = strchr(ptr, '\t')) == NULL)
153 if ((tab = strchr(ptr, '\t')) == NULL)
157 proto_table[proto].p_name) == 0) {
168 if (proto == PROTO_NFS)
174 return (SHARED_NOT_SHARED);
179 * Returns true if the specified directory is empty. If we can't open the
180 * directory at all, return true so that the mount can fail with a more
181 * informative error message.
184 dir_is_empty(const char *dirname)
189 if ((dirp = opendir(dirname)) == NULL)
192 while ((dp = readdir64(dirp)) != NULL) {
194 if (strcmp(dp->d_name, ".") == 0 ||
195 strcmp(dp->d_name, "..") == 0)
198 (void) closedir(dirp);
202 (void) closedir(dirp);
208 * Checks to see if the mount is active. If the filesystem is mounted, we fill
209 * in 'where' with the current mountpoint, and return 1. Otherwise, we return
213 is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where)
217 if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0)
221 *where = zfs_strdup(zfs_hdl, entry.mnt_mountp);
227 zfs_is_mounted(zfs_handle_t *zhp, char **where)
229 return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where));
233 * Returns true if the given dataset is mountable, false otherwise. Returns the
234 * mountpoint in 'buf'.
237 zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen,
238 zprop_source_t *source)
240 char sourceloc[MAXNAMELEN];
241 zprop_source_t sourcetype;
243 if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type))
246 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen,
247 &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0);
249 if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 ||
250 strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0)
253 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF)
256 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) &&
257 getzoneid() == GLOBAL_ZONEID)
261 *source = sourcetype;
267 * Mount the given filesystem.
270 zfs_mount(zfs_handle_t *zhp, const char *options, int flags)
273 char mountpoint[ZFS_MAXPROPLEN];
274 char mntopts[MNT_LINE_MAX];
275 libzfs_handle_t *hdl = zhp->zfs_hdl;
280 (void) strlcpy(mntopts, options, sizeof (mntopts));
283 * If the pool is imported read-only then all mounts must be read-only
285 if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL))
288 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
291 /* Create the directory if it doesn't already exist */
292 if (lstat(mountpoint, &buf) != 0) {
293 if (mkdirp(mountpoint, 0755) != 0) {
294 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
295 "failed to create mountpoint"));
296 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
297 dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
302 #ifdef illumos /* FreeBSD: overlay mounts are not checked. */
304 * Determine if the mountpoint is empty. If so, refuse to perform the
305 * mount. We don't perform this check if MS_OVERLAY is specified, which
306 * would defeat the point. We also avoid this check if 'remount' is
309 if ((flags & MS_OVERLAY) == 0 &&
310 strstr(mntopts, MNTOPT_REMOUNT) == NULL &&
311 !dir_is_empty(mountpoint)) {
312 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
313 "directory is not empty"));
314 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
315 dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint));
319 /* perform the mount */
320 if (zmount(zfs_get_name(zhp), mountpoint, flags,
321 MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) {
323 * Generic errors are nasty, but there are just way too many
324 * from mount(), and they're well-understood. We pick a few
325 * common ones to improve upon.
327 if (errno == EBUSY) {
328 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
329 "mountpoint or dataset is busy"));
330 } else if (errno == EPERM) {
331 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
332 "Insufficient privileges"));
333 } else if (errno == ENOTSUP) {
337 VERIFY(zfs_spa_version(zhp, &spa_version) == 0);
338 (void) snprintf(buf, sizeof (buf),
339 dgettext(TEXT_DOMAIN, "Can't mount a version %lld "
340 "file system on a version %d pool. Pool must be"
341 " upgraded to mount this file system."),
342 (u_longlong_t)zfs_prop_get_int(zhp,
343 ZFS_PROP_VERSION), spa_version);
344 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf));
346 zfs_error_aux(hdl, strerror(errno));
348 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
349 dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
353 /* add the mounted entry into our cache */
354 libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint,
360 * Unmount a single filesystem.
363 unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags)
365 if (umount2(mountpoint, flags) != 0) {
366 zfs_error_aux(hdl, strerror(errno));
367 return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED,
368 dgettext(TEXT_DOMAIN, "cannot unmount '%s'"),
376 * Unmount the given filesystem.
379 zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags)
381 libzfs_handle_t *hdl = zhp->zfs_hdl;
385 /* check to see if we need to unmount the filesystem */
386 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
387 libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) {
389 * mountpoint may have come from a call to
390 * getmnt/getmntany if it isn't NULL. If it is NULL,
391 * we know it comes from libzfs_mnttab_find which can
392 * then get freed later. We strdup it to play it safe.
394 if (mountpoint == NULL)
395 mntpt = zfs_strdup(hdl, entry.mnt_mountp);
397 mntpt = zfs_strdup(hdl, mountpoint);
400 * Unshare and unmount the filesystem
402 if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0)
405 if (unmount_one(hdl, mntpt, flags) != 0) {
407 (void) zfs_shareall(zhp);
410 libzfs_mnttab_remove(hdl, zhp->zfs_name);
418 * Unmount this filesystem and any children inheriting the mountpoint property.
419 * To do this, just act like we're changing the mountpoint property, but don't
420 * remount the filesystems afterwards.
423 zfs_unmountall(zfs_handle_t *zhp, int flags)
425 prop_changelist_t *clp;
428 clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags);
432 ret = changelist_prefix(clp);
433 changelist_free(clp);
439 zfs_is_shared(zfs_handle_t *zhp)
441 zfs_share_type_t rc = 0;
442 zfs_share_proto_t *curr_proto;
444 if (ZFS_IS_VOLUME(zhp))
447 for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
449 rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto);
451 return (rc ? B_TRUE : B_FALSE);
455 zfs_share(zfs_handle_t *zhp)
457 assert(!ZFS_IS_VOLUME(zhp));
458 return (zfs_share_proto(zhp, share_all_proto));
462 zfs_unshare(zfs_handle_t *zhp)
464 assert(!ZFS_IS_VOLUME(zhp));
465 return (zfs_unshareall(zhp));
469 * Check to see if the filesystem is currently shared.
472 zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto)
477 if (!zfs_is_mounted(zhp, &mountpoint))
478 return (SHARED_NOT_SHARED);
480 if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto))
481 != SHARED_NOT_SHARED) {
489 return (SHARED_NOT_SHARED);
494 zfs_is_shared_nfs(zfs_handle_t *zhp, char **where)
496 return (zfs_is_shared_proto(zhp, where,
497 PROTO_NFS) != SHARED_NOT_SHARED);
501 zfs_is_shared_smb(zfs_handle_t *zhp, char **where)
503 return (zfs_is_shared_proto(zhp, where,
504 PROTO_SMB) != SHARED_NOT_SHARED);
508 * Make sure things will work if libshare isn't installed by using
509 * wrapper functions that check to see that the pointers to functions
510 * initialized in _zfs_init_libshare() are actually present.
514 static sa_handle_t (*_sa_init)(int);
515 static void (*_sa_fini)(sa_handle_t);
516 static sa_share_t (*_sa_find_share)(sa_handle_t, char *);
517 static int (*_sa_enable_share)(sa_share_t, char *);
518 static int (*_sa_disable_share)(sa_share_t, char *);
519 static char *(*_sa_errorstr)(int);
520 static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *);
521 static boolean_t (*_sa_needs_refresh)(sa_handle_t *);
522 static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t);
523 static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t,
524 char *, char *, zprop_source_t, char *, char *, char *);
525 static void (*_sa_update_sharetab_ts)(sa_handle_t);
529 * _zfs_init_libshare()
531 * Find the libshare.so.1 entry points that we use here and save the
532 * values to be used later. This is triggered by the runtime loader.
533 * Make sure the correct ISA version is loaded.
536 #pragma init(_zfs_init_libshare)
538 _zfs_init_libshare(void)
542 char path[MAXPATHLEN];
546 if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1)
551 (void) snprintf(path, MAXPATHLEN,
552 "/usr/lib/%s/libshare.so.1", isa);
554 if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) {
555 _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init");
556 _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini");
557 _sa_find_share = (sa_share_t (*)(sa_handle_t, char *))
558 dlsym(libshare, "sa_find_share");
559 _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
561 _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
563 _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr");
564 _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *))
565 dlsym(libshare, "sa_parse_legacy_options");
566 _sa_needs_refresh = (boolean_t (*)(sa_handle_t *))
567 dlsym(libshare, "sa_needs_refresh");
568 _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t))
569 dlsym(libshare, "sa_get_zfs_handle");
570 _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t,
571 sa_share_t, char *, char *, zprop_source_t, char *,
572 char *, char *))dlsym(libshare, "sa_zfs_process_share");
573 _sa_update_sharetab_ts = (void (*)(sa_handle_t))
574 dlsym(libshare, "sa_update_sharetab_ts");
575 if (_sa_init == NULL || _sa_fini == NULL ||
576 _sa_find_share == NULL || _sa_enable_share == NULL ||
577 _sa_disable_share == NULL || _sa_errorstr == NULL ||
578 _sa_parse_legacy_options == NULL ||
579 _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL ||
580 _sa_zfs_process_share == NULL ||
581 _sa_update_sharetab_ts == NULL) {
584 _sa_disable_share = NULL;
585 _sa_enable_share = NULL;
587 _sa_parse_legacy_options = NULL;
588 (void) dlclose(libshare);
589 _sa_needs_refresh = NULL;
590 _sa_get_zfs_handle = NULL;
591 _sa_zfs_process_share = NULL;
592 _sa_update_sharetab_ts = NULL;
599 * zfs_init_libshare(zhandle, service)
601 * Initialize the libshare API if it hasn't already been initialized.
602 * In all cases it returns 0 if it succeeded and an error if not. The
603 * service value is which part(s) of the API to initialize and is a
604 * direct map to the libshare sa_init(service) interface.
607 zfs_init_libshare(libzfs_handle_t *zhandle, int service)
612 if (_sa_init == NULL)
615 if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) {
617 * We had a cache miss. Most likely it is a new ZFS
618 * dataset that was just created. We want to make sure
619 * so check timestamps to see if a different process
620 * has updated any of the configuration. If there was
621 * some non-ZFS change, we need to re-initialize the
624 zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS;
625 if (_sa_needs_refresh != NULL &&
626 _sa_needs_refresh(zhandle->libzfs_sharehdl)) {
627 zfs_uninit_libshare(zhandle);
628 zhandle->libzfs_sharehdl = _sa_init(service);
632 if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL)
633 zhandle->libzfs_sharehdl = _sa_init(service);
635 if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL)
643 * zfs_uninit_libshare(zhandle)
645 * Uninitialize the libshare API if it hasn't already been
646 * uninitialized. It is OK to call multiple times.
649 zfs_uninit_libshare(libzfs_handle_t *zhandle)
651 if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) {
653 if (_sa_fini != NULL)
654 _sa_fini(zhandle->libzfs_sharehdl);
656 zhandle->libzfs_sharehdl = NULL;
661 * zfs_parse_options(options, proto)
663 * Call the legacy parse interface to get the protocol specific
664 * options using the NULL arg to indicate that this is a "parse" only.
667 zfs_parse_options(char *options, zfs_share_proto_t proto)
670 if (_sa_parse_legacy_options != NULL) {
671 return (_sa_parse_legacy_options(NULL, options,
672 proto_table[proto].p_name));
674 return (SA_CONFIG_ERR);
682 * zfs_sa_find_share(handle, path)
684 * wrapper around sa_find_share to find a share path in the
688 zfs_sa_find_share(sa_handle_t handle, char *path)
690 if (_sa_find_share != NULL)
691 return (_sa_find_share(handle, path));
696 * zfs_sa_enable_share(share, proto)
698 * Wrapper for sa_enable_share which enables a share for a specified
702 zfs_sa_enable_share(sa_share_t share, char *proto)
704 if (_sa_enable_share != NULL)
705 return (_sa_enable_share(share, proto));
706 return (SA_CONFIG_ERR);
710 * zfs_sa_disable_share(share, proto)
712 * Wrapper for sa_enable_share which disables a share for a specified
716 zfs_sa_disable_share(sa_share_t share, char *proto)
718 if (_sa_disable_share != NULL)
719 return (_sa_disable_share(share, proto));
720 return (SA_CONFIG_ERR);
725 * Share the given filesystem according to the options in the specified
726 * protocol specific properties (sharenfs, sharesmb). We rely
727 * on "libshare" to the dirty work for us.
730 zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
732 char mountpoint[ZFS_MAXPROPLEN];
733 char shareopts[ZFS_MAXPROPLEN];
734 char sourcestr[ZFS_MAXPROPLEN];
735 libzfs_handle_t *hdl = zhp->zfs_hdl;
736 zfs_share_proto_t *curr_proto;
737 zprop_source_t sourcetype;
740 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
743 for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) {
745 * Return success if there are no share options.
747 if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop,
748 shareopts, sizeof (shareopts), &sourcetype, sourcestr,
749 ZFS_MAXPROPLEN, B_FALSE) != 0 ||
750 strcmp(shareopts, "off") == 0)
754 ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API);
756 (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
757 dgettext(TEXT_DOMAIN, "cannot share '%s': %s"),
758 zfs_get_name(zhp), _sa_errorstr != NULL ?
759 _sa_errorstr(ret) : "");
765 * If the 'zoned' property is set, then zfs_is_mountable()
766 * will have already bailed out if we are in the global zone.
767 * But local zones cannot be NFS servers, so we ignore it for
768 * local zones as well.
770 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED))
774 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint);
777 * This may be a new file system that was just
778 * created so isn't in the internal cache
779 * (second time through). Rather than
780 * reloading the entire configuration, we can
781 * assume ZFS has done the checking and it is
782 * safe to add this to the internal
785 if (_sa_zfs_process_share(hdl->libzfs_sharehdl,
786 NULL, NULL, mountpoint,
787 proto_table[*curr_proto].p_name, sourcetype,
788 shareopts, sourcestr, zhp->zfs_name) != SA_OK) {
789 (void) zfs_error_fmt(hdl,
790 proto_table[*curr_proto].p_share_err,
791 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
795 hdl->libzfs_shareflags |= ZFSSHARE_MISS;
796 share = zfs_sa_find_share(hdl->libzfs_sharehdl,
801 err = zfs_sa_enable_share(share,
802 proto_table[*curr_proto].p_name);
804 (void) zfs_error_fmt(hdl,
805 proto_table[*curr_proto].p_share_err,
806 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
812 if (*curr_proto != PROTO_NFS) {
813 fprintf(stderr, "Unsupported share protocol: %d.\n",
818 if (strcmp(shareopts, "on") == 0)
819 error = fsshare(ZFS_EXPORTS_PATH, mountpoint, "");
821 error = fsshare(ZFS_EXPORTS_PATH, mountpoint, shareopts);
825 (void) zfs_error_fmt(hdl,
826 proto_table[*curr_proto].p_share_err,
827 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
838 zfs_share_nfs(zfs_handle_t *zhp)
840 return (zfs_share_proto(zhp, nfs_only));
844 zfs_share_smb(zfs_handle_t *zhp)
846 return (zfs_share_proto(zhp, smb_only));
850 zfs_shareall(zfs_handle_t *zhp)
852 return (zfs_share_proto(zhp, share_all_proto));
856 * Unshare a filesystem by mountpoint.
859 unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint,
860 zfs_share_proto_t proto)
867 * Mountpoint could get trashed if libshare calls getmntany
868 * which it does during API initialization, so strdup the
871 mntpt = zfs_strdup(hdl, mountpoint);
873 /* make sure libshare initialized */
874 if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) {
875 free(mntpt); /* don't need the copy anymore */
876 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
877 dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"),
878 name, _sa_errorstr(err)));
881 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt);
882 free(mntpt); /* don't need the copy anymore */
885 err = zfs_sa_disable_share(share, proto_table[proto].p_name);
887 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
888 dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"),
889 name, _sa_errorstr(err)));
892 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
893 dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"),
897 char buf[MAXPATHLEN];
901 if (proto != PROTO_NFS) {
902 fprintf(stderr, "No SMB support in FreeBSD yet.\n");
906 err = fsunshare(ZFS_EXPORTS_PATH, mountpoint);
908 zfs_error_aux(hdl, "%s", strerror(err));
909 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
910 dgettext(TEXT_DOMAIN,
911 "cannot unshare '%s'"), name));
918 * Unshare the given filesystem.
921 zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint,
922 zfs_share_proto_t *proto)
924 libzfs_handle_t *hdl = zhp->zfs_hdl;
928 /* check to see if need to unmount the filesystem */
929 rewind(zhp->zfs_hdl->libzfs_mnttab);
930 if (mountpoint != NULL)
931 mountpoint = mntpt = zfs_strdup(hdl, mountpoint);
933 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
934 libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) {
935 zfs_share_proto_t *curr_proto;
937 if (mountpoint == NULL)
938 mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp);
940 for (curr_proto = proto; *curr_proto != PROTO_END;
943 if (is_shared(hdl, mntpt, *curr_proto) &&
944 unshare_one(hdl, zhp->zfs_name,
945 mntpt, *curr_proto) != 0) {
959 zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint)
961 return (zfs_unshare_proto(zhp, mountpoint, nfs_only));
965 zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint)
967 return (zfs_unshare_proto(zhp, mountpoint, smb_only));
971 * Same as zfs_unmountall(), but for NFS and SMB unshares.
974 zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
976 prop_changelist_t *clp;
979 clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0);
983 ret = changelist_unshare(clp, proto);
984 changelist_free(clp);
990 zfs_unshareall_nfs(zfs_handle_t *zhp)
992 return (zfs_unshareall_proto(zhp, nfs_only));
996 zfs_unshareall_smb(zfs_handle_t *zhp)
998 return (zfs_unshareall_proto(zhp, smb_only));
1002 zfs_unshareall(zfs_handle_t *zhp)
1004 return (zfs_unshareall_proto(zhp, share_all_proto));
1008 zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint)
1010 return (zfs_unshare_proto(zhp, mountpoint, share_all_proto));
1014 * Remove the mountpoint associated with the current dataset, if necessary.
1015 * We only remove the underlying directory if:
1017 * - The mountpoint is not 'none' or 'legacy'
1018 * - The mountpoint is non-empty
1019 * - The mountpoint is the default or inherited
1020 * - The 'zoned' property is set, or we're in a local zone
1022 * Any other directories we leave alone.
1025 remove_mountpoint(zfs_handle_t *zhp)
1027 char mountpoint[ZFS_MAXPROPLEN];
1028 zprop_source_t source;
1030 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint),
1034 if (source == ZPROP_SRC_DEFAULT ||
1035 source == ZPROP_SRC_INHERITED) {
1037 * Try to remove the directory, silently ignoring any errors.
1038 * The filesystem may have since been removed or moved around,
1039 * and this error isn't really useful to the administrator in
1042 (void) rmdir(mountpoint);
1047 libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp)
1049 if (cbp->cb_alloc == cbp->cb_used) {
1053 newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64;
1054 ptr = zfs_realloc(zhp->zfs_hdl,
1055 cbp->cb_handles, cbp->cb_alloc * sizeof (void *),
1056 newsz * sizeof (void *));
1057 cbp->cb_handles = ptr;
1058 cbp->cb_alloc = newsz;
1060 cbp->cb_handles[cbp->cb_used++] = zhp;
1064 mount_cb(zfs_handle_t *zhp, void *data)
1066 get_all_cb_t *cbp = data;
1068 if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) {
1073 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) {
1079 * If this filesystem is inconsistent and has a receive resume
1080 * token, we can not mount it.
1082 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) &&
1083 zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN,
1084 NULL, 0, NULL, NULL, 0, B_TRUE) == 0) {
1089 libzfs_add_handle(cbp, zhp);
1090 if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) {
1098 libzfs_dataset_cmp(const void *a, const void *b)
1100 zfs_handle_t **za = (zfs_handle_t **)a;
1101 zfs_handle_t **zb = (zfs_handle_t **)b;
1102 char mounta[MAXPATHLEN];
1103 char mountb[MAXPATHLEN];
1104 boolean_t gota, gotb;
1106 if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
1107 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
1108 sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
1109 if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
1110 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
1111 sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
1114 return (strcmp(mounta, mountb));
1121 return (strcmp(zfs_get_name(a), zfs_get_name(b)));
1125 * Mount and share all datasets within the given pool. This assumes that no
1126 * datasets within the pool are currently mounted. Because users can create
1127 * complicated nested hierarchies of mountpoints, we first gather all the
1128 * datasets and mountpoints within the pool, and sort them by mountpoint. Once
1129 * we have the list of all filesystems, we iterate over them in order and mount
1130 * and/or share each one.
1132 #pragma weak zpool_mount_datasets = zpool_enable_datasets
1134 zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
1136 get_all_cb_t cb = { 0 };
1137 libzfs_handle_t *hdl = zhp->zpool_hdl;
1143 * Gather all non-snap datasets within the pool.
1145 if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL)
1148 libzfs_add_handle(&cb, zfsp);
1149 if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0)
1152 * Sort the datasets by mountpoint.
1154 qsort(cb.cb_handles, cb.cb_used, sizeof (void *),
1155 libzfs_dataset_cmp);
1158 * And mount all the datasets, keeping track of which ones
1159 * succeeded or failed.
1161 if ((good = zfs_alloc(zhp->zpool_hdl,
1162 cb.cb_used * sizeof (int))) == NULL)
1166 for (i = 0; i < cb.cb_used; i++) {
1167 if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0)
1174 * Then share all the ones that need to be shared. This needs
1175 * to be a separate pass in order to avoid excessive reloading
1176 * of the configuration. Good should never be NULL since
1177 * zfs_alloc is supposed to exit if memory isn't available.
1179 for (i = 0; i < cb.cb_used; i++) {
1180 if (good[i] && zfs_share(cb.cb_handles[i]) != 0)
1187 for (i = 0; i < cb.cb_used; i++)
1188 zfs_close(cb.cb_handles[i]);
1189 free(cb.cb_handles);
1195 mountpoint_compare(const void *a, const void *b)
1197 const char *mounta = *((char **)a);
1198 const char *mountb = *((char **)b);
1200 return (strcmp(mountb, mounta));
1203 /* alias for 2002/240 */
1204 #pragma weak zpool_unmount_datasets = zpool_disable_datasets
1206 * Unshare and unmount all datasets within the given pool. We don't want to
1207 * rely on traversing the DSL to discover the filesystems within the pool,
1208 * because this may be expensive (if not all of them are mounted), and can fail
1209 * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and
1210 * gather all the filesystems that are currently mounted.
1213 zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
1216 struct mnttab entry;
1218 char **mountpoints = NULL;
1219 zfs_handle_t **datasets = NULL;
1220 libzfs_handle_t *hdl = zhp->zpool_hdl;
1223 int flags = (force ? MS_FORCE : 0);
1225 namelen = strlen(zhp->zpool_name);
1227 rewind(hdl->libzfs_mnttab);
1229 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
1231 * Ignore non-ZFS entries.
1233 if (entry.mnt_fstype == NULL ||
1234 strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
1238 * Ignore filesystems not within this pool.
1240 if (entry.mnt_mountp == NULL ||
1241 strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 ||
1242 (entry.mnt_special[namelen] != '/' &&
1243 entry.mnt_special[namelen] != '\0'))
1247 * At this point we've found a filesystem within our pool. Add
1248 * it to our growing list.
1250 if (used == alloc) {
1252 if ((mountpoints = zfs_alloc(hdl,
1253 8 * sizeof (void *))) == NULL)
1256 if ((datasets = zfs_alloc(hdl,
1257 8 * sizeof (void *))) == NULL)
1264 if ((ptr = zfs_realloc(hdl, mountpoints,
1265 alloc * sizeof (void *),
1266 alloc * 2 * sizeof (void *))) == NULL)
1270 if ((ptr = zfs_realloc(hdl, datasets,
1271 alloc * sizeof (void *),
1272 alloc * 2 * sizeof (void *))) == NULL)
1280 if ((mountpoints[used] = zfs_strdup(hdl,
1281 entry.mnt_mountp)) == NULL)
1285 * This is allowed to fail, in case there is some I/O error. It
1286 * is only used to determine if we need to remove the underlying
1287 * mountpoint, so failure is not fatal.
1289 datasets[used] = make_dataset_handle(hdl, entry.mnt_special);
1295 * At this point, we have the entire list of filesystems, so sort it by
1298 qsort(mountpoints, used, sizeof (char *), mountpoint_compare);
1301 * Walk through and first unshare everything.
1303 for (i = 0; i < used; i++) {
1304 zfs_share_proto_t *curr_proto;
1305 for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
1307 if (is_shared(hdl, mountpoints[i], *curr_proto) &&
1308 unshare_one(hdl, mountpoints[i],
1309 mountpoints[i], *curr_proto) != 0)
1315 * Now unmount everything, removing the underlying directories as
1318 for (i = 0; i < used; i++) {
1319 if (unmount_one(hdl, mountpoints[i], flags) != 0)
1323 for (i = 0; i < used; i++) {
1325 remove_mountpoint(datasets[i]);
1330 for (i = 0; i < used; i++) {
1332 zfs_close(datasets[i]);
1333 free(mountpoints[i]);