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 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
28 * Routines to manage ZFS mounts. We separate all the nasty routines that have
29 * to deal with the OS. The following functions are the main entry points --
30 * they are used by mount and unmount and when changing a filesystem's
38 * This file also contains the functions used to manage sharing filesystems via
47 * zfs_is_shared_iscsi()
53 * zfs_unshareall_nfs()
54 * zfs_unshareall_smb()
56 * zfs_unshareall_bypath()
59 * The following functions are available for pool consumers, and will
60 * mount/unmount and share/unshare all datasets within pool:
62 * zpool_enable_datasets()
63 * zpool_disable_datasets()
76 #include <sys/mntent.h>
77 #include <sys/mount.h>
82 #include "libzfs_impl.h"
86 #define MAXISALEN 257 /* based on sysinfo(2) man page */
88 static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *);
89 zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **,
92 static int (*iscsitgt_zfs_share)(const char *);
93 static int (*iscsitgt_zfs_unshare)(const char *);
94 static int (*iscsitgt_zfs_is_shared)(const char *);
95 static int (*iscsitgt_svc_online)();
98 * The share protocols table must be in the same order as the zfs_share_prot_t
99 * enum in libzfs_impl.h
108 proto_table_t proto_table[PROTO_END] = {
109 {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED},
110 {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED},
113 zfs_share_proto_t nfs_only[] = {
118 zfs_share_proto_t smb_only[] = {
122 zfs_share_proto_t share_all_proto[] = {
128 #pragma init(zfs_iscsi_init)
134 if ((libiscsitgt = dlopen("/lib/libiscsitgt.so.1",
135 RTLD_LAZY | RTLD_GLOBAL)) == NULL ||
136 (iscsitgt_zfs_share = (int (*)(const char *))dlsym(libiscsitgt,
137 "iscsitgt_zfs_share")) == NULL ||
138 (iscsitgt_zfs_unshare = (int (*)(const char *))dlsym(libiscsitgt,
139 "iscsitgt_zfs_unshare")) == NULL ||
140 (iscsitgt_zfs_is_shared = (int (*)(const char *))dlsym(libiscsitgt,
141 "iscsitgt_zfs_is_shared")) == NULL ||
142 (iscsitgt_svc_online = (int (*)(const char *))dlsym(libiscsitgt,
143 "iscsitgt_svc_online")) == NULL) {
144 iscsitgt_zfs_share = NULL;
145 iscsitgt_zfs_unshare = NULL;
146 iscsitgt_zfs_is_shared = NULL;
147 iscsitgt_svc_online = NULL;
152 * Search the sharetab for the given mountpoint and protocol, returning
153 * a zfs_share_type_t value.
155 static zfs_share_type_t
156 is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto)
158 char buf[MAXPATHLEN], *tab;
161 if (hdl->libzfs_sharetab == NULL)
162 return (SHARED_NOT_SHARED);
164 (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET);
166 while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) {
168 /* the mountpoint is the first entry on each line */
169 if ((tab = strchr(buf, '\t')) == NULL)
173 if (strcmp(buf, mountpoint) == 0) {
176 * the protocol field is the third field
177 * skip over second field
180 if ((tab = strchr(ptr, '\t')) == NULL)
183 if ((tab = strchr(ptr, '\t')) == NULL)
187 proto_table[proto].p_name) == 0) {
198 if (proto == PROTO_NFS)
204 return (SHARED_NOT_SHARED);
209 * Returns true if the specified directory is empty. If we can't open the
210 * directory at all, return true so that the mount can fail with a more
211 * informative error message.
214 dir_is_empty(const char *dirname)
219 if ((dirp = opendir(dirname)) == NULL)
222 while ((dp = readdir64(dirp)) != NULL) {
224 if (strcmp(dp->d_name, ".") == 0 ||
225 strcmp(dp->d_name, "..") == 0)
228 (void) closedir(dirp);
232 (void) closedir(dirp);
238 * Checks to see if the mount is active. If the filesystem is mounted, we fill
239 * in 'where' with the current mountpoint, and return 1. Otherwise, we return
243 is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where)
247 if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0)
251 *where = zfs_strdup(zfs_hdl, entry.mnt_mountp);
257 zfs_is_mounted(zfs_handle_t *zhp, char **where)
259 return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where));
263 * Returns true if the given dataset is mountable, false otherwise. Returns the
264 * mountpoint in 'buf'.
267 zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen,
268 zprop_source_t *source)
270 char sourceloc[ZFS_MAXNAMELEN];
271 zprop_source_t sourcetype;
273 if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type))
276 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen,
277 &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0);
279 if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 ||
280 strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0)
283 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF)
286 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) &&
287 getzoneid() == GLOBAL_ZONEID)
291 *source = sourcetype;
297 * Mount the given filesystem.
300 zfs_mount(zfs_handle_t *zhp, const char *options, int flags)
303 char mountpoint[ZFS_MAXPROPLEN];
304 char mntopts[MNT_LINE_MAX];
305 libzfs_handle_t *hdl = zhp->zfs_hdl;
310 (void) strlcpy(mntopts, options, sizeof (mntopts));
312 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
315 /* Create the directory if it doesn't already exist */
316 if (lstat(mountpoint, &buf) != 0) {
317 if (mkdirp(mountpoint, 0755) != 0) {
318 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
319 "failed to create mountpoint"));
320 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
321 dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
326 #if 0 /* FreeBSD: overlay mounts are not checked. */
328 * Determine if the mountpoint is empty. If so, refuse to perform the
329 * mount. We don't perform this check if MS_OVERLAY is specified, which
330 * would defeat the point. We also avoid this check if 'remount' is
333 if ((flags & MS_OVERLAY) == 0 &&
334 strstr(mntopts, MNTOPT_REMOUNT) == NULL &&
335 !dir_is_empty(mountpoint)) {
336 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
337 "directory is not empty"));
338 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
339 dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint));
343 /* perform the mount */
344 if (zmount(zfs_get_name(zhp), mountpoint, flags,
345 MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) {
347 * Generic errors are nasty, but there are just way too many
348 * from mount(), and they're well-understood. We pick a few
349 * common ones to improve upon.
351 if (errno == EBUSY) {
352 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
353 "mountpoint or dataset is busy"));
354 } else if (errno == EPERM) {
355 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
356 "Insufficient privileges"));
358 zfs_error_aux(hdl, strerror(errno));
360 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
361 dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
365 /* add the mounted entry into our cache */
366 libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint,
372 * Unmount a single filesystem.
375 unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags)
377 if (unmount(mountpoint, flags) != 0) {
378 zfs_error_aux(hdl, strerror(errno));
379 return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED,
380 dgettext(TEXT_DOMAIN, "cannot unmount '%s'"),
388 * Unmount the given filesystem.
391 zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags)
393 libzfs_handle_t *hdl = zhp->zfs_hdl;
397 /* check to see if we need to unmount the filesystem */
398 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
399 libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) {
401 * mountpoint may have come from a call to
402 * getmnt/getmntany if it isn't NULL. If it is NULL,
403 * we know it comes from libzfs_mnttab_find which can
404 * then get freed later. We strdup it to play it safe.
406 if (mountpoint == NULL)
407 mntpt = zfs_strdup(hdl, entry.mnt_mountp);
409 mntpt = zfs_strdup(hdl, mountpoint);
412 * Unshare and unmount the filesystem
414 if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0)
417 if (unmount_one(hdl, mntpt, flags) != 0) {
419 (void) zfs_shareall(zhp);
422 libzfs_mnttab_remove(hdl, zhp->zfs_name);
430 * Unmount this filesystem and any children inheriting the mountpoint property.
431 * To do this, just act like we're changing the mountpoint property, but don't
432 * remount the filesystems afterwards.
435 zfs_unmountall(zfs_handle_t *zhp, int flags)
437 prop_changelist_t *clp;
440 clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags);
444 ret = changelist_prefix(clp);
445 changelist_free(clp);
451 zfs_is_shared(zfs_handle_t *zhp)
453 zfs_share_type_t rc = 0;
454 zfs_share_proto_t *curr_proto;
456 if (ZFS_IS_VOLUME(zhp))
457 return (zfs_is_shared_iscsi(zhp));
459 for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
461 rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto);
463 return (rc ? B_TRUE : B_FALSE);
467 zfs_share(zfs_handle_t *zhp)
469 if (ZFS_IS_VOLUME(zhp))
470 return (zfs_share_iscsi(zhp));
472 return (zfs_share_proto(zhp, share_all_proto));
476 zfs_unshare(zfs_handle_t *zhp)
478 if (ZFS_IS_VOLUME(zhp))
479 return (zfs_unshare_iscsi(zhp));
481 return (zfs_unshareall(zhp));
485 * Check to see if the filesystem is currently shared.
488 zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto)
493 if (!zfs_is_mounted(zhp, &mountpoint))
494 return (SHARED_NOT_SHARED);
496 if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) {
504 return (SHARED_NOT_SHARED);
509 zfs_is_shared_nfs(zfs_handle_t *zhp, char **where)
511 return (zfs_is_shared_proto(zhp, where,
512 PROTO_NFS) != SHARED_NOT_SHARED);
516 zfs_is_shared_smb(zfs_handle_t *zhp, char **where)
518 return (zfs_is_shared_proto(zhp, where,
519 PROTO_SMB) != SHARED_NOT_SHARED);
523 * Make sure things will work if libshare isn't installed by using
524 * wrapper functions that check to see that the pointers to functions
525 * initialized in _zfs_init_libshare() are actually present.
529 static sa_handle_t (*_sa_init)(int);
530 static void (*_sa_fini)(sa_handle_t);
531 static sa_share_t (*_sa_find_share)(sa_handle_t, char *);
532 static int (*_sa_enable_share)(sa_share_t, char *);
533 static int (*_sa_disable_share)(sa_share_t, char *);
534 static char *(*_sa_errorstr)(int);
535 static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *);
536 static boolean_t (*_sa_needs_refresh)(sa_handle_t *);
537 static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t);
538 static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t,
539 char *, char *, zprop_source_t, char *, char *, char *);
540 static void (*_sa_update_sharetab_ts)(sa_handle_t);
544 * _zfs_init_libshare()
546 * Find the libshare.so.1 entry points that we use here and save the
547 * values to be used later. This is triggered by the runtime loader.
548 * Make sure the correct ISA version is loaded.
551 #pragma init(_zfs_init_libshare)
553 _zfs_init_libshare(void)
557 char path[MAXPATHLEN];
561 if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1)
566 (void) snprintf(path, MAXPATHLEN,
567 "/usr/lib/%s/libshare.so.1", isa);
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,
576 _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
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) {
599 _sa_disable_share = NULL;
600 _sa_enable_share = 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;
614 * zfs_init_libshare(zhandle, service)
616 * Initialize the libshare API if it hasn't already been initialized.
617 * In all cases it returns 0 if it succeeded and an error if not. The
618 * service value is which part(s) of the API to initialize and is a
619 * direct map to the libshare sa_init(service) interface.
622 zfs_init_libshare(libzfs_handle_t *zhandle, int service)
627 if (_sa_init == NULL)
630 if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) {
632 * We had a cache miss. Most likely it is a new ZFS
633 * dataset that was just created. We want to make sure
634 * so check timestamps to see if a different process
635 * has updated any of the configuration. If there was
636 * some non-ZFS change, we need to re-initialize the
639 zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS;
640 if (_sa_needs_refresh != NULL &&
641 _sa_needs_refresh(zhandle->libzfs_sharehdl)) {
642 zfs_uninit_libshare(zhandle);
643 zhandle->libzfs_sharehdl = _sa_init(service);
647 if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL)
648 zhandle->libzfs_sharehdl = _sa_init(service);
650 if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL)
658 * zfs_uninit_libshare(zhandle)
660 * Uninitialize the libshare API if it hasn't already been
661 * uninitialized. It is OK to call multiple times.
664 zfs_uninit_libshare(libzfs_handle_t *zhandle)
666 if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) {
668 if (_sa_fini != NULL)
669 _sa_fini(zhandle->libzfs_sharehdl);
671 zhandle->libzfs_sharehdl = NULL;
676 * zfs_parse_options(options, proto)
678 * Call the legacy parse interface to get the protocol specific
679 * options using the NULL arg to indicate that this is a "parse" only.
682 zfs_parse_options(char *options, zfs_share_proto_t proto)
685 if (_sa_parse_legacy_options != NULL) {
686 return (_sa_parse_legacy_options(NULL, options,
687 proto_table[proto].p_name));
689 return (SA_CONFIG_ERR);
697 * zfs_sa_find_share(handle, path)
699 * wrapper around sa_find_share to find a share path in the
703 zfs_sa_find_share(sa_handle_t handle, char *path)
705 if (_sa_find_share != NULL)
706 return (_sa_find_share(handle, path));
711 * zfs_sa_enable_share(share, proto)
713 * Wrapper for sa_enable_share which enables a share for a specified
717 zfs_sa_enable_share(sa_share_t share, char *proto)
719 if (_sa_enable_share != NULL)
720 return (_sa_enable_share(share, proto));
721 return (SA_CONFIG_ERR);
725 * zfs_sa_disable_share(share, proto)
727 * Wrapper for sa_enable_share which disables a share for a specified
731 zfs_sa_disable_share(sa_share_t share, char *proto)
733 if (_sa_disable_share != NULL)
734 return (_sa_disable_share(share, proto));
735 return (SA_CONFIG_ERR);
740 * Share the given filesystem according to the options in the specified
741 * protocol specific properties (sharenfs, sharesmb). We rely
742 * on "libshare" to the dirty work for us.
745 zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
747 char mountpoint[ZFS_MAXPROPLEN];
748 char shareopts[ZFS_MAXPROPLEN];
749 char sourcestr[ZFS_MAXPROPLEN];
750 libzfs_handle_t *hdl = zhp->zfs_hdl;
751 zfs_share_proto_t *curr_proto;
752 zprop_source_t sourcetype;
755 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
758 for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) {
760 * Return success if there are no share options.
762 if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop,
763 shareopts, sizeof (shareopts), &sourcetype, sourcestr,
764 ZFS_MAXPROPLEN, B_FALSE) != 0 ||
765 strcmp(shareopts, "off") == 0)
769 * If the 'zoned' property is set, then zfs_is_mountable()
770 * will have already bailed out if we are in the global zone.
771 * But local zones cannot be NFS servers, so we ignore it for
772 * local zones as well.
774 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED))
777 if (*curr_proto != PROTO_NFS) {
778 fprintf(stderr, "Unsupported share protocol: %d.\n",
784 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint);
787 * This may be a new file system that was just
788 * created so isn't in the internal cache
789 * (second time through). Rather than
790 * reloading the entire configuration, we can
791 * assume ZFS has done the checking and it is
792 * safe to add this to the internal
795 if (_sa_zfs_process_share(hdl->libzfs_sharehdl,
796 NULL, NULL, mountpoint,
797 proto_table[*curr_proto].p_name, sourcetype,
798 shareopts, sourcestr, zhp->zfs_name) != SA_OK) {
799 (void) zfs_error_fmt(hdl,
800 proto_table[*curr_proto].p_share_err,
801 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
805 hdl->libzfs_shareflags |= ZFSSHARE_MISS;
806 share = zfs_sa_find_share(hdl->libzfs_sharehdl,
811 err = zfs_sa_enable_share(share,
812 proto_table[*curr_proto].p_name);
814 (void) zfs_error_fmt(hdl,
815 proto_table[*curr_proto].p_share_err,
816 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
822 if (strcmp(shareopts, "on") == 0)
823 error = fsshare(ZFS_EXPORTS_PATH, mountpoint, "");
825 error = fsshare(ZFS_EXPORTS_PATH, mountpoint, shareopts);
829 (void) zfs_error_fmt(hdl,
830 proto_table[*curr_proto].p_share_err,
831 dgettext(TEXT_DOMAIN, "cannot share '%s'"),
841 zfs_share_nfs(zfs_handle_t *zhp)
843 return (zfs_share_proto(zhp, nfs_only));
847 zfs_share_smb(zfs_handle_t *zhp)
849 return (zfs_share_proto(zhp, smb_only));
853 zfs_shareall(zfs_handle_t *zhp)
855 return (zfs_share_proto(zhp, share_all_proto));
859 * Unshare a filesystem by mountpoint.
862 unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint,
863 zfs_share_proto_t proto)
865 char buf[MAXPATHLEN];
869 if (proto != PROTO_NFS) {
870 fprintf(stderr, "No SMB support in FreeBSD yet.\n");
874 error = fsunshare(ZFS_EXPORTS_PATH, mountpoint);
876 zfs_error_aux(hdl, "%s", strerror(error));
877 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
878 dgettext(TEXT_DOMAIN,
879 "cannot unshare '%s'"), name));
886 * Unshare the given filesystem.
889 zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint,
890 zfs_share_proto_t *proto)
892 libzfs_handle_t *hdl = zhp->zfs_hdl;
896 /* check to see if need to unmount the filesystem */
897 rewind(zhp->zfs_hdl->libzfs_mnttab);
898 if (mountpoint != NULL)
899 mountpoint = mntpt = zfs_strdup(hdl, mountpoint);
901 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
902 libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) {
903 zfs_share_proto_t *curr_proto;
905 if (mountpoint == NULL)
906 mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp);
908 for (curr_proto = proto; *curr_proto != PROTO_END;
911 if (is_shared(hdl, mntpt, *curr_proto) &&
912 unshare_one(hdl, zhp->zfs_name,
913 mntpt, *curr_proto) != 0) {
927 zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint)
929 return (zfs_unshare_proto(zhp, mountpoint, nfs_only));
933 zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint)
935 return (zfs_unshare_proto(zhp, mountpoint, smb_only));
939 * Same as zfs_unmountall(), but for NFS and SMB unshares.
942 zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
944 prop_changelist_t *clp;
947 clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0);
951 ret = changelist_unshare(clp, proto);
952 changelist_free(clp);
958 zfs_unshareall_nfs(zfs_handle_t *zhp)
960 return (zfs_unshareall_proto(zhp, nfs_only));
964 zfs_unshareall_smb(zfs_handle_t *zhp)
966 return (zfs_unshareall_proto(zhp, smb_only));
970 zfs_unshareall(zfs_handle_t *zhp)
972 return (zfs_unshareall_proto(zhp, share_all_proto));
976 zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint)
978 return (zfs_unshare_proto(zhp, mountpoint, share_all_proto));
982 * Remove the mountpoint associated with the current dataset, if necessary.
983 * We only remove the underlying directory if:
985 * - The mountpoint is not 'none' or 'legacy'
986 * - The mountpoint is non-empty
987 * - The mountpoint is the default or inherited
988 * - The 'zoned' property is set, or we're in a local zone
990 * Any other directories we leave alone.
993 remove_mountpoint(zfs_handle_t *zhp)
995 char mountpoint[ZFS_MAXPROPLEN];
996 zprop_source_t source;
998 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint),
1002 if (source == ZPROP_SRC_DEFAULT ||
1003 source == ZPROP_SRC_INHERITED) {
1005 * Try to remove the directory, silently ignoring any errors.
1006 * The filesystem may have since been removed or moved around,
1007 * and this error isn't really useful to the administrator in
1010 (void) rmdir(mountpoint);
1015 zfs_is_shared_iscsi(zfs_handle_t *zhp)
1019 * If iscsi deamon isn't running then we aren't shared
1021 if (iscsitgt_svc_online && iscsitgt_svc_online() == 1)
1024 return (iscsitgt_zfs_is_shared != NULL &&
1025 iscsitgt_zfs_is_shared(zhp->zfs_name) != 0);
1029 zfs_share_iscsi(zfs_handle_t *zhp)
1031 char shareopts[ZFS_MAXPROPLEN];
1032 const char *dataset = zhp->zfs_name;
1033 libzfs_handle_t *hdl = zhp->zfs_hdl;
1036 * Return success if there are no share options.
1038 if (zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts,
1039 sizeof (shareopts), NULL, NULL, 0, B_FALSE) != 0 ||
1040 strcmp(shareopts, "off") == 0)
1043 /* We don't support iSCSI on FreeBSD yet. */
1045 if (iscsitgt_zfs_share == NULL || iscsitgt_zfs_share(dataset) != 0) {
1046 int error = EZFS_SHAREISCSIFAILED;
1049 * If service isn't availabele and EPERM was
1050 * returned then use special error.
1052 if (iscsitgt_svc_online && errno == EPERM &&
1053 (iscsitgt_svc_online() != 0))
1054 error = EZFS_ISCSISVCUNAVAIL;
1056 return (zfs_error_fmt(hdl, error,
1057 dgettext(TEXT_DOMAIN, "cannot share '%s'"), dataset));
1065 zfs_unshare_iscsi(zfs_handle_t *zhp)
1067 const char *dataset = zfs_get_name(zhp);
1068 libzfs_handle_t *hdl = zhp->zfs_hdl;
1070 /* We don't support iSCSI on FreeBSD yet. */
1073 * Return if the volume is not shared
1075 if (zfs_is_shared_iscsi(zhp) != SHARED_ISCSI)
1079 * If this fails with ENODEV it indicates that zvol wasn't shared so
1080 * we should return success in that case.
1082 if (iscsitgt_zfs_unshare == NULL ||
1083 (iscsitgt_zfs_unshare(dataset) != 0 && errno != ENODEV)) {
1085 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1086 "Insufficient privileges to unshare iscsi"));
1087 return (zfs_error_fmt(hdl, EZFS_UNSHAREISCSIFAILED,
1088 dgettext(TEXT_DOMAIN, "cannot unshare '%s'"), dataset));
1095 typedef struct mount_cbdata {
1096 zfs_handle_t **cb_datasets;
1102 mount_cb(zfs_handle_t *zhp, void *data)
1104 mount_cbdata_t *cbp = data;
1106 if (!(zfs_get_type(zhp) & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) {
1111 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) {
1116 if (cbp->cb_alloc == cbp->cb_used) {
1119 if ((ptr = zfs_realloc(zhp->zfs_hdl,
1120 cbp->cb_datasets, cbp->cb_alloc * sizeof (void *),
1121 cbp->cb_alloc * 2 * sizeof (void *))) == NULL)
1123 cbp->cb_datasets = ptr;
1128 cbp->cb_datasets[cbp->cb_used++] = zhp;
1130 return (zfs_iter_filesystems(zhp, mount_cb, cbp));
1134 dataset_cmp(const void *a, const void *b)
1136 zfs_handle_t **za = (zfs_handle_t **)a;
1137 zfs_handle_t **zb = (zfs_handle_t **)b;
1138 char mounta[MAXPATHLEN];
1139 char mountb[MAXPATHLEN];
1140 boolean_t gota, gotb;
1142 if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
1143 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
1144 sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
1145 if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
1146 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
1147 sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
1150 return (strcmp(mounta, mountb));
1157 return (strcmp(zfs_get_name(a), zfs_get_name(b)));
1161 * Mount and share all datasets within the given pool. This assumes that no
1162 * datasets within the pool are currently mounted. Because users can create
1163 * complicated nested hierarchies of mountpoints, we first gather all the
1164 * datasets and mountpoints within the pool, and sort them by mountpoint. Once
1165 * we have the list of all filesystems, we iterate over them in order and mount
1166 * and/or share each one.
1168 #pragma weak zpool_mount_datasets = zpool_enable_datasets
1170 zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
1172 mount_cbdata_t cb = { 0 };
1173 libzfs_handle_t *hdl = zhp->zpool_hdl;
1179 * Gather all non-snap datasets within the pool.
1181 if ((cb.cb_datasets = zfs_alloc(hdl, 4 * sizeof (void *))) == NULL)
1185 if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL)
1188 cb.cb_datasets[0] = zfsp;
1191 if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0)
1195 * Sort the datasets by mountpoint.
1197 qsort(cb.cb_datasets, cb.cb_used, sizeof (void *), dataset_cmp);
1200 * And mount all the datasets, keeping track of which ones
1201 * succeeded or failed.
1203 if ((good = zfs_alloc(zhp->zpool_hdl,
1204 cb.cb_used * sizeof (int))) == NULL)
1208 for (i = 0; i < cb.cb_used; i++) {
1209 if (zfs_mount(cb.cb_datasets[i], mntopts, flags) != 0)
1216 * Then share all the ones that need to be shared. This needs
1217 * to be a separate pass in order to avoid excessive reloading
1218 * of the configuration. Good should never be NULL since
1219 * zfs_alloc is supposed to exit if memory isn't available.
1221 for (i = 0; i < cb.cb_used; i++) {
1222 if (good[i] && zfs_share(cb.cb_datasets[i]) != 0)
1229 for (i = 0; i < cb.cb_used; i++)
1230 zfs_close(cb.cb_datasets[i]);
1231 free(cb.cb_datasets);
1238 zvol_cb(const char *dataset, void *data)
1240 libzfs_handle_t *hdl = data;
1244 * Ignore snapshots and ignore failures from non-existant datasets.
1246 if (strchr(dataset, '@') != NULL ||
1247 (zhp = zfs_open(hdl, dataset, ZFS_TYPE_VOLUME)) == NULL)
1250 if (zfs_unshare_iscsi(zhp) != 0)
1259 mountpoint_compare(const void *a, const void *b)
1261 const char *mounta = *((char **)a);
1262 const char *mountb = *((char **)b);
1264 return (strcmp(mountb, mounta));
1268 * Unshare and unmount all datasets within the given pool. We don't want to
1269 * rely on traversing the DSL to discover the filesystems within the pool,
1270 * because this may be expensive (if not all of them are mounted), and can fail
1271 * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and
1272 * gather all the filesystems that are currently mounted.
1274 #pragma weak zpool_unmount_datasets = zpool_disable_datasets
1276 zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
1281 char **mountpoints = NULL;
1282 zfs_handle_t **datasets = NULL;
1283 libzfs_handle_t *hdl = zhp->zpool_hdl;
1286 int flags = (force ? MS_FORCE : 0);
1289 * First unshare all zvols.
1291 if (zpool_iter_zvol(zhp, zvol_cb, hdl) != 0)
1294 namelen = strlen(zhp->zpool_name);
1297 if ((n = getmntinfo(&sfs, MNT_WAIT)) == 0) {
1298 fprintf(stderr, "getmntinfo(): %s\n", strerror(errno));
1301 for (j = 0; j < n; j++) {
1303 * Ignore non-ZFS entries.
1305 if (strcmp(sfs[j].f_fstypename, MNTTYPE_ZFS) != 0)
1309 * Ignore filesystems not within this pool.
1311 if (strncmp(sfs[j].f_mntfromname, zhp->zpool_name, namelen) != 0 ||
1312 (sfs[j].f_mntfromname[namelen] != '/' &&
1313 sfs[j].f_mntfromname[namelen] != '\0'))
1317 * At this point we've found a filesystem within our pool. Add
1318 * it to our growing list.
1320 if (used == alloc) {
1322 if ((mountpoints = zfs_alloc(hdl,
1323 8 * sizeof (void *))) == NULL)
1326 if ((datasets = zfs_alloc(hdl,
1327 8 * sizeof (void *))) == NULL)
1334 if ((ptr = zfs_realloc(hdl, mountpoints,
1335 alloc * sizeof (void *),
1336 alloc * 2 * sizeof (void *))) == NULL)
1340 if ((ptr = zfs_realloc(hdl, datasets,
1341 alloc * sizeof (void *),
1342 alloc * 2 * sizeof (void *))) == NULL)
1350 if ((mountpoints[used] = zfs_strdup(hdl,
1351 sfs[j].f_mntonname)) == NULL)
1355 * This is allowed to fail, in case there is some I/O error. It
1356 * is only used to determine if we need to remove the underlying
1357 * mountpoint, so failure is not fatal.
1359 datasets[used] = make_dataset_handle(hdl, sfs[j].f_mntfromname);
1365 * At this point, we have the entire list of filesystems, so sort it by
1368 qsort(mountpoints, used, sizeof (char *), mountpoint_compare);
1371 * Walk through and first unshare everything.
1373 for (i = 0; i < used; i++) {
1374 zfs_share_proto_t *curr_proto;
1375 for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
1377 if (is_shared(hdl, mountpoints[i], *curr_proto) &&
1378 unshare_one(hdl, mountpoints[i],
1379 mountpoints[i], *curr_proto) != 0)
1385 * Now unmount everything, removing the underlying directories as
1388 for (i = 0; i < used; i++) {
1389 if (unmount_one(hdl, mountpoints[i], flags) != 0)
1393 for (i = 0; i < used; i++) {
1395 remove_mountpoint(datasets[i]);
1400 for (i = 0; i < used; i++) {
1402 zfs_close(datasets[i]);
1403 free(mountpoints[i]);