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.
27 * Routines to manage ZFS mounts. We separate all the nasty routines that have
28 * to deal with the OS. The following functions are the main entry points --
29 * they are used by mount and unmount and when changing a filesystem's
37 * This file also contains the functions used to manage sharing filesystems via
50 * zfs_unshareall_nfs()
51 * zfs_unshareall_smb()
53 * zfs_unshareall_bypath()
55 * The following functions are available for pool consumers, and will
56 * mount/unmount and share/unshare all datasets within pool:
58 * zpool_enable_datasets()
59 * zpool_disable_datasets()
72 #include <sys/mntent.h>
73 #include <sys/mount.h>
78 #include "libzfs_impl.h"
81 #include <sys/systeminfo.h>
82 #define MAXISALEN 257 /* based on sysinfo(2) man page */
84 static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *);
85 zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **,
89 * The share protocols table must be in the same order as the zfs_share_prot_t
90 * enum in libzfs_impl.h
99 proto_table_t proto_table[PROTO_END] = {
100 {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED},
101 {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED},
104 zfs_share_proto_t nfs_only[] = {
109 zfs_share_proto_t smb_only[] = {
113 zfs_share_proto_t share_all_proto[] = {
120 * Search the sharetab for the given mountpoint and protocol, returning
121 * a zfs_share_type_t value.
123 static zfs_share_type_t
124 is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto)
126 char buf[MAXPATHLEN], *tab;
129 if (hdl->libzfs_sharetab == NULL)
130 return (SHARED_NOT_SHARED);
132 (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET);
134 while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) {
136 /* the mountpoint is the first entry on each line */
137 if ((tab = strchr(buf, '\t')) == NULL)
141 if (strcmp(buf, mountpoint) == 0) {
143 * the protocol field is the third field
144 * skip over second field
147 if ((tab = strchr(ptr, '\t')) == NULL)
150 if ((tab = strchr(ptr, '\t')) == NULL)
154 proto_table[proto].p_name) == 0) {
167 return (SHARED_NOT_SHARED);
171 * Returns true if the specified directory is empty. If we can't open the
172 * directory at all, return true so that the mount can fail with a more
173 * informative error message.
176 dir_is_empty(const char *dirname)
181 if ((dirp = opendir(dirname)) == NULL)
184 while ((dp = readdir64(dirp)) != NULL) {
186 if (strcmp(dp->d_name, ".") == 0 ||
187 strcmp(dp->d_name, "..") == 0)
190 (void) closedir(dirp);
194 (void) closedir(dirp);
199 * Checks to see if the mount is active. If the filesystem is mounted, we fill
200 * in 'where' with the current mountpoint, and return 1. Otherwise, we return
204 is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where)
208 if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0)
212 *where = zfs_strdup(zfs_hdl, entry.mnt_mountp);
218 zfs_is_mounted(zfs_handle_t *zhp, char **where)
220 return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where));
224 * Returns true if the given dataset is mountable, false otherwise. Returns the
225 * mountpoint in 'buf'.
228 zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen,
229 zprop_source_t *source)
231 char sourceloc[ZFS_MAXNAMELEN];
232 zprop_source_t sourcetype;
234 if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type))
237 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen,
238 &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0);
240 if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 ||
241 strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0)
244 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF)
247 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) &&
248 getzoneid() == GLOBAL_ZONEID)
252 *source = sourcetype;
258 * Mount the given filesystem.
261 zfs_mount(zfs_handle_t *zhp, const char *options, int flags)
264 char mountpoint[ZFS_MAXPROPLEN];
265 char mntopts[MNT_LINE_MAX];
266 libzfs_handle_t *hdl = zhp->zfs_hdl;
271 (void) strlcpy(mntopts, options, sizeof (mntopts));
274 * If the pool is imported read-only then all mounts must be read-only
276 if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL))
279 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
282 /* Create the directory if it doesn't already exist */
283 if (lstat(mountpoint, &buf) != 0) {
284 if (mkdirp(mountpoint, 0755) != 0) {
285 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
286 "failed to create mountpoint"));
287 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
288 dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
294 * Determine if the mountpoint is empty. If so, refuse to perform the
295 * mount. We don't perform this check if MS_OVERLAY is specified, which
296 * would defeat the point. We also avoid this check if 'remount' is
299 if ((flags & MS_OVERLAY) == 0 &&
300 strstr(mntopts, MNTOPT_REMOUNT) == NULL &&
301 !dir_is_empty(mountpoint)) {
302 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
303 "directory is not empty"));
304 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
305 dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint));
308 /* perform the mount */
309 if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags,
310 MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) {
312 * Generic errors are nasty, but there are just way too many
313 * from mount(), and they're well-understood. We pick a few
314 * common ones to improve upon.
316 if (errno == EBUSY) {
317 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
318 "mountpoint or dataset is busy"));
319 } else if (errno == EPERM) {
320 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
321 "Insufficient privileges"));
322 } else if (errno == ENOTSUP) {
326 VERIFY(zfs_spa_version(zhp, &spa_version) == 0);
327 (void) snprintf(buf, sizeof (buf),
328 dgettext(TEXT_DOMAIN, "Can't mount a version %lld "
329 "file system on a version %d pool. Pool must be"
330 " upgraded to mount this file system."),
331 (u_longlong_t)zfs_prop_get_int(zhp,
332 ZFS_PROP_VERSION), spa_version);
333 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf));
335 zfs_error_aux(hdl, strerror(errno));
337 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
338 dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
342 /* add the mounted entry into our cache */
343 libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint,
349 * Unmount a single filesystem.
352 unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags)
354 if (umount2(mountpoint, flags) != 0) {
355 zfs_error_aux(hdl, strerror(errno));
356 return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED,
357 dgettext(TEXT_DOMAIN, "cannot unmount '%s'"),
365 * Unmount the given filesystem.
368 zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags)
370 libzfs_handle_t *hdl = zhp->zfs_hdl;
374 /* check to see if we need to unmount the filesystem */
375 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
376 libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) {
378 * mountpoint may have come from a call to
379 * getmnt/getmntany if it isn't NULL. If it is NULL,
380 * we know it comes from libzfs_mnttab_find which can
381 * then get freed later. We strdup it to play it safe.
383 if (mountpoint == NULL)
384 mntpt = zfs_strdup(hdl, entry.mnt_mountp);
386 mntpt = zfs_strdup(hdl, mountpoint);
389 * Unshare and unmount the filesystem
391 if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0)
394 if (unmount_one(hdl, mntpt, flags) != 0) {
396 (void) zfs_shareall(zhp);
399 libzfs_mnttab_remove(hdl, zhp->zfs_name);
407 * Unmount this filesystem and any children inheriting the mountpoint property.
408 * To do this, just act like we're changing the mountpoint property, but don't
409 * remount the filesystems afterwards.
412 zfs_unmountall(zfs_handle_t *zhp, int flags)
414 prop_changelist_t *clp;
417 clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags);
421 ret = changelist_prefix(clp);
422 changelist_free(clp);
428 zfs_is_shared(zfs_handle_t *zhp)
430 zfs_share_type_t rc = 0;
431 zfs_share_proto_t *curr_proto;
433 if (ZFS_IS_VOLUME(zhp))
436 for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
438 rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto);
440 return (rc ? B_TRUE : B_FALSE);
444 zfs_share(zfs_handle_t *zhp)
446 assert(!ZFS_IS_VOLUME(zhp));
447 return (zfs_share_proto(zhp, share_all_proto));
451 zfs_unshare(zfs_handle_t *zhp)
453 assert(!ZFS_IS_VOLUME(zhp));
454 return (zfs_unshareall(zhp));
458 * Check to see if the filesystem is currently shared.
461 zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto)
466 if (!zfs_is_mounted(zhp, &mountpoint))
467 return (SHARED_NOT_SHARED);
469 if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) {
477 return (SHARED_NOT_SHARED);
482 zfs_is_shared_nfs(zfs_handle_t *zhp, char **where)
484 return (zfs_is_shared_proto(zhp, where,
485 PROTO_NFS) != SHARED_NOT_SHARED);
489 zfs_is_shared_smb(zfs_handle_t *zhp, char **where)
491 return (zfs_is_shared_proto(zhp, where,
492 PROTO_SMB) != SHARED_NOT_SHARED);
496 * Make sure things will work if libshare isn't installed by using
497 * wrapper functions that check to see that the pointers to functions
498 * initialized in _zfs_init_libshare() are actually present.
501 static sa_handle_t (*_sa_init)(int);
502 static void (*_sa_fini)(sa_handle_t);
503 static sa_share_t (*_sa_find_share)(sa_handle_t, char *);
504 static int (*_sa_enable_share)(sa_share_t, char *);
505 static int (*_sa_disable_share)(sa_share_t, char *);
506 static char *(*_sa_errorstr)(int);
507 static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *);
508 static boolean_t (*_sa_needs_refresh)(sa_handle_t *);
509 static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t);
510 static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t,
511 char *, char *, zprop_source_t, char *, char *, char *);
512 static void (*_sa_update_sharetab_ts)(sa_handle_t);
515 * _zfs_init_libshare()
517 * Find the libshare.so.1 entry points that we use here and save the
518 * values to be used later. This is triggered by the runtime loader.
519 * Make sure the correct ISA version is loaded.
522 #pragma init(_zfs_init_libshare)
524 _zfs_init_libshare(void)
527 char path[MAXPATHLEN];
531 if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1)
536 (void) snprintf(path, MAXPATHLEN,
537 "/usr/lib/%s/libshare.so.1", isa);
539 if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) {
540 _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init");
541 _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini");
542 _sa_find_share = (sa_share_t (*)(sa_handle_t, char *))
543 dlsym(libshare, "sa_find_share");
544 _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
546 _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
548 _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr");
549 _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *))
550 dlsym(libshare, "sa_parse_legacy_options");
551 _sa_needs_refresh = (boolean_t (*)(sa_handle_t *))
552 dlsym(libshare, "sa_needs_refresh");
553 _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t))
554 dlsym(libshare, "sa_get_zfs_handle");
555 _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t,
556 sa_share_t, char *, char *, zprop_source_t, char *,
557 char *, char *))dlsym(libshare, "sa_zfs_process_share");
558 _sa_update_sharetab_ts = (void (*)(sa_handle_t))
559 dlsym(libshare, "sa_update_sharetab_ts");
560 if (_sa_init == NULL || _sa_fini == NULL ||
561 _sa_find_share == NULL || _sa_enable_share == NULL ||
562 _sa_disable_share == NULL || _sa_errorstr == NULL ||
563 _sa_parse_legacy_options == NULL ||
564 _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL ||
565 _sa_zfs_process_share == NULL ||
566 _sa_update_sharetab_ts == NULL) {
569 _sa_disable_share = NULL;
570 _sa_enable_share = NULL;
572 _sa_parse_legacy_options = NULL;
573 (void) dlclose(libshare);
574 _sa_needs_refresh = NULL;
575 _sa_get_zfs_handle = NULL;
576 _sa_zfs_process_share = NULL;
577 _sa_update_sharetab_ts = NULL;
583 * zfs_init_libshare(zhandle, service)
585 * Initialize the libshare API if it hasn't already been initialized.
586 * In all cases it returns 0 if it succeeded and an error if not. The
587 * service value is which part(s) of the API to initialize and is a
588 * direct map to the libshare sa_init(service) interface.
591 zfs_init_libshare(libzfs_handle_t *zhandle, int service)
595 if (_sa_init == NULL)
598 if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) {
600 * We had a cache miss. Most likely it is a new ZFS
601 * dataset that was just created. We want to make sure
602 * so check timestamps to see if a different process
603 * has updated any of the configuration. If there was
604 * some non-ZFS change, we need to re-initialize the
607 zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS;
608 if (_sa_needs_refresh != NULL &&
609 _sa_needs_refresh(zhandle->libzfs_sharehdl)) {
610 zfs_uninit_libshare(zhandle);
611 zhandle->libzfs_sharehdl = _sa_init(service);
615 if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL)
616 zhandle->libzfs_sharehdl = _sa_init(service);
618 if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL)
625 * zfs_uninit_libshare(zhandle)
627 * Uninitialize the libshare API if it hasn't already been
628 * uninitialized. It is OK to call multiple times.
631 zfs_uninit_libshare(libzfs_handle_t *zhandle)
633 if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) {
634 if (_sa_fini != NULL)
635 _sa_fini(zhandle->libzfs_sharehdl);
636 zhandle->libzfs_sharehdl = NULL;
641 * zfs_parse_options(options, proto)
643 * Call the legacy parse interface to get the protocol specific
644 * options using the NULL arg to indicate that this is a "parse" only.
647 zfs_parse_options(char *options, zfs_share_proto_t proto)
649 if (_sa_parse_legacy_options != NULL) {
650 return (_sa_parse_legacy_options(NULL, options,
651 proto_table[proto].p_name));
653 return (SA_CONFIG_ERR);
657 * zfs_sa_find_share(handle, path)
659 * wrapper around sa_find_share to find a share path in the
663 zfs_sa_find_share(sa_handle_t handle, char *path)
665 if (_sa_find_share != NULL)
666 return (_sa_find_share(handle, path));
671 * zfs_sa_enable_share(share, proto)
673 * Wrapper for sa_enable_share which enables a share for a specified
677 zfs_sa_enable_share(sa_share_t share, char *proto)
679 if (_sa_enable_share != NULL)
680 return (_sa_enable_share(share, proto));
681 return (SA_CONFIG_ERR);
685 * zfs_sa_disable_share(share, proto)
687 * Wrapper for sa_enable_share which disables a share for a specified
691 zfs_sa_disable_share(sa_share_t share, char *proto)
693 if (_sa_disable_share != NULL)
694 return (_sa_disable_share(share, proto));
695 return (SA_CONFIG_ERR);
699 * Share the given filesystem according to the options in the specified
700 * protocol specific properties (sharenfs, sharesmb). We rely
701 * on "libshare" to the dirty work for us.
704 zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
706 char mountpoint[ZFS_MAXPROPLEN];
707 char shareopts[ZFS_MAXPROPLEN];
708 char sourcestr[ZFS_MAXPROPLEN];
709 libzfs_handle_t *hdl = zhp->zfs_hdl;
711 zfs_share_proto_t *curr_proto;
712 zprop_source_t sourcetype;
715 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
718 if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) {
719 (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
720 dgettext(TEXT_DOMAIN, "cannot share '%s': %s"),
721 zfs_get_name(zhp), _sa_errorstr != NULL ?
722 _sa_errorstr(ret) : "");
726 for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) {
728 * Return success if there are no share options.
730 if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop,
731 shareopts, sizeof (shareopts), &sourcetype, sourcestr,
732 ZFS_MAXPROPLEN, B_FALSE) != 0 ||
733 strcmp(shareopts, "off") == 0)
737 * If the 'zoned' property is set, then zfs_is_mountable()
738 * will have already bailed out if we are in the global zone.
739 * But local zones cannot be NFS servers, so we ignore it for
740 * local zones as well.
742 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED))
745 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint);
748 * This may be a new file system that was just
749 * created so isn't in the internal cache
750 * (second time through). Rather than
751 * reloading the entire configuration, we can
752 * assume ZFS has done the checking and it is
753 * safe to add this to the internal
756 if (_sa_zfs_process_share(hdl->libzfs_sharehdl,
757 NULL, NULL, mountpoint,
758 proto_table[*curr_proto].p_name, sourcetype,
759 shareopts, sourcestr, zhp->zfs_name) != SA_OK) {
760 (void) zfs_error_fmt(hdl,
761 proto_table[*curr_proto].p_share_err,
762 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
766 hdl->libzfs_shareflags |= ZFSSHARE_MISS;
767 share = zfs_sa_find_share(hdl->libzfs_sharehdl,
772 err = zfs_sa_enable_share(share,
773 proto_table[*curr_proto].p_name);
775 (void) zfs_error_fmt(hdl,
776 proto_table[*curr_proto].p_share_err,
777 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
782 (void) zfs_error_fmt(hdl,
783 proto_table[*curr_proto].p_share_err,
784 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
795 zfs_share_nfs(zfs_handle_t *zhp)
797 return (zfs_share_proto(zhp, nfs_only));
801 zfs_share_smb(zfs_handle_t *zhp)
803 return (zfs_share_proto(zhp, smb_only));
807 zfs_shareall(zfs_handle_t *zhp)
809 return (zfs_share_proto(zhp, share_all_proto));
813 * Unshare a filesystem by mountpoint.
816 unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint,
817 zfs_share_proto_t proto)
823 * Mountpoint could get trashed if libshare calls getmntany
824 * which it does during API initialization, so strdup the
827 mntpt = zfs_strdup(hdl, mountpoint);
829 /* make sure libshare initialized */
830 if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) {
831 free(mntpt); /* don't need the copy anymore */
832 return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
833 dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"),
834 name, _sa_errorstr(err)));
837 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt);
838 free(mntpt); /* don't need the copy anymore */
841 err = zfs_sa_disable_share(share, proto_table[proto].p_name);
843 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
844 dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"),
845 name, _sa_errorstr(err)));
848 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
849 dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"),
856 * Unshare the given filesystem.
859 zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint,
860 zfs_share_proto_t *proto)
862 libzfs_handle_t *hdl = zhp->zfs_hdl;
866 /* check to see if need to unmount the filesystem */
867 rewind(zhp->zfs_hdl->libzfs_mnttab);
868 if (mountpoint != NULL)
869 mountpoint = mntpt = zfs_strdup(hdl, mountpoint);
871 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
872 libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) {
873 zfs_share_proto_t *curr_proto;
875 if (mountpoint == NULL)
876 mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp);
878 for (curr_proto = proto; *curr_proto != PROTO_END;
881 if (is_shared(hdl, mntpt, *curr_proto) &&
882 unshare_one(hdl, zhp->zfs_name,
883 mntpt, *curr_proto) != 0) {
897 zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint)
899 return (zfs_unshare_proto(zhp, mountpoint, nfs_only));
903 zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint)
905 return (zfs_unshare_proto(zhp, mountpoint, smb_only));
909 * Same as zfs_unmountall(), but for NFS and SMB unshares.
912 zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
914 prop_changelist_t *clp;
917 clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0);
921 ret = changelist_unshare(clp, proto);
922 changelist_free(clp);
928 zfs_unshareall_nfs(zfs_handle_t *zhp)
930 return (zfs_unshareall_proto(zhp, nfs_only));
934 zfs_unshareall_smb(zfs_handle_t *zhp)
936 return (zfs_unshareall_proto(zhp, smb_only));
940 zfs_unshareall(zfs_handle_t *zhp)
942 return (zfs_unshareall_proto(zhp, share_all_proto));
946 zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint)
948 return (zfs_unshare_proto(zhp, mountpoint, share_all_proto));
952 * Remove the mountpoint associated with the current dataset, if necessary.
953 * We only remove the underlying directory if:
955 * - The mountpoint is not 'none' or 'legacy'
956 * - The mountpoint is non-empty
957 * - The mountpoint is the default or inherited
958 * - The 'zoned' property is set, or we're in a local zone
960 * Any other directories we leave alone.
963 remove_mountpoint(zfs_handle_t *zhp)
965 char mountpoint[ZFS_MAXPROPLEN];
966 zprop_source_t source;
968 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint),
972 if (source == ZPROP_SRC_DEFAULT ||
973 source == ZPROP_SRC_INHERITED) {
975 * Try to remove the directory, silently ignoring any errors.
976 * The filesystem may have since been removed or moved around,
977 * and this error isn't really useful to the administrator in
980 (void) rmdir(mountpoint);
985 libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp)
987 if (cbp->cb_alloc == cbp->cb_used) {
991 newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64;
992 ptr = zfs_realloc(zhp->zfs_hdl,
993 cbp->cb_handles, cbp->cb_alloc * sizeof (void *),
994 newsz * sizeof (void *));
995 cbp->cb_handles = ptr;
996 cbp->cb_alloc = newsz;
998 cbp->cb_handles[cbp->cb_used++] = zhp;
1002 mount_cb(zfs_handle_t *zhp, void *data)
1004 get_all_cb_t *cbp = data;
1006 if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) {
1011 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) {
1016 libzfs_add_handle(cbp, zhp);
1017 if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) {
1025 libzfs_dataset_cmp(const void *a, const void *b)
1027 zfs_handle_t **za = (zfs_handle_t **)a;
1028 zfs_handle_t **zb = (zfs_handle_t **)b;
1029 char mounta[MAXPATHLEN];
1030 char mountb[MAXPATHLEN];
1031 boolean_t gota, gotb;
1033 if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
1034 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
1035 sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
1036 if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
1037 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
1038 sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
1041 return (strcmp(mounta, mountb));
1048 return (strcmp(zfs_get_name(a), zfs_get_name(b)));
1052 * Mount and share all datasets within the given pool. This assumes that no
1053 * datasets within the pool are currently mounted. Because users can create
1054 * complicated nested hierarchies of mountpoints, we first gather all the
1055 * datasets and mountpoints within the pool, and sort them by mountpoint. Once
1056 * we have the list of all filesystems, we iterate over them in order and mount
1057 * and/or share each one.
1059 #pragma weak zpool_mount_datasets = zpool_enable_datasets
1061 zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
1063 get_all_cb_t cb = { 0 };
1064 libzfs_handle_t *hdl = zhp->zpool_hdl;
1070 * Gather all non-snap datasets within the pool.
1072 if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL)
1075 libzfs_add_handle(&cb, zfsp);
1076 if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0)
1079 * Sort the datasets by mountpoint.
1081 qsort(cb.cb_handles, cb.cb_used, sizeof (void *),
1082 libzfs_dataset_cmp);
1085 * And mount all the datasets, keeping track of which ones
1086 * succeeded or failed.
1088 if ((good = zfs_alloc(zhp->zpool_hdl,
1089 cb.cb_used * sizeof (int))) == NULL)
1093 for (i = 0; i < cb.cb_used; i++) {
1094 if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0)
1101 * Then share all the ones that need to be shared. This needs
1102 * to be a separate pass in order to avoid excessive reloading
1103 * of the configuration. Good should never be NULL since
1104 * zfs_alloc is supposed to exit if memory isn't available.
1106 for (i = 0; i < cb.cb_used; i++) {
1107 if (good[i] && zfs_share(cb.cb_handles[i]) != 0)
1114 for (i = 0; i < cb.cb_used; i++)
1115 zfs_close(cb.cb_handles[i]);
1116 free(cb.cb_handles);
1122 mountpoint_compare(const void *a, const void *b)
1124 const char *mounta = *((char **)a);
1125 const char *mountb = *((char **)b);
1127 return (strcmp(mountb, mounta));
1130 /* alias for 2002/240 */
1131 #pragma weak zpool_unmount_datasets = zpool_disable_datasets
1133 * Unshare and unmount all datasets within the given pool. We don't want to
1134 * rely on traversing the DSL to discover the filesystems within the pool,
1135 * because this may be expensive (if not all of them are mounted), and can fail
1136 * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and
1137 * gather all the filesystems that are currently mounted.
1140 zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
1143 struct mnttab entry;
1145 char **mountpoints = NULL;
1146 zfs_handle_t **datasets = NULL;
1147 libzfs_handle_t *hdl = zhp->zpool_hdl;
1150 int flags = (force ? MS_FORCE : 0);
1152 namelen = strlen(zhp->zpool_name);
1154 rewind(hdl->libzfs_mnttab);
1156 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
1158 * Ignore non-ZFS entries.
1160 if (entry.mnt_fstype == NULL ||
1161 strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
1165 * Ignore filesystems not within this pool.
1167 if (entry.mnt_mountp == NULL ||
1168 strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 ||
1169 (entry.mnt_special[namelen] != '/' &&
1170 entry.mnt_special[namelen] != '\0'))
1174 * At this point we've found a filesystem within our pool. Add
1175 * it to our growing list.
1177 if (used == alloc) {
1179 if ((mountpoints = zfs_alloc(hdl,
1180 8 * sizeof (void *))) == NULL)
1183 if ((datasets = zfs_alloc(hdl,
1184 8 * sizeof (void *))) == NULL)
1191 if ((ptr = zfs_realloc(hdl, mountpoints,
1192 alloc * sizeof (void *),
1193 alloc * 2 * sizeof (void *))) == NULL)
1197 if ((ptr = zfs_realloc(hdl, datasets,
1198 alloc * sizeof (void *),
1199 alloc * 2 * sizeof (void *))) == NULL)
1207 if ((mountpoints[used] = zfs_strdup(hdl,
1208 entry.mnt_mountp)) == NULL)
1212 * This is allowed to fail, in case there is some I/O error. It
1213 * is only used to determine if we need to remove the underlying
1214 * mountpoint, so failure is not fatal.
1216 datasets[used] = make_dataset_handle(hdl, entry.mnt_special);
1222 * At this point, we have the entire list of filesystems, so sort it by
1225 qsort(mountpoints, used, sizeof (char *), mountpoint_compare);
1228 * Walk through and first unshare everything.
1230 for (i = 0; i < used; i++) {
1231 zfs_share_proto_t *curr_proto;
1232 for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
1234 if (is_shared(hdl, mountpoints[i], *curr_proto) &&
1235 unshare_one(hdl, mountpoints[i],
1236 mountpoints[i], *curr_proto) != 0)
1242 * Now unmount everything, removing the underlying directories as
1245 for (i = 0; i < used; i++) {
1246 if (unmount_one(hdl, mountpoints[i], flags) != 0)
1250 for (i = 0; i < used; i++) {
1252 remove_mountpoint(datasets[i]);
1257 for (i = 0; i < used; i++) {
1259 zfs_close(datasets[i]);
1260 free(mountpoints[i]);