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
));
273 if (!zfs_is_mountable(zhp
, mountpoint
, sizeof (mountpoint
), NULL
))
276 /* Create the directory if it doesn't already exist */
277 if (lstat(mountpoint
, &buf
) != 0) {
278 if (mkdirp(mountpoint
, 0755) != 0) {
279 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
280 "failed to create mountpoint"));
281 return (zfs_error_fmt(hdl
, EZFS_MOUNTFAILED
,
282 dgettext(TEXT_DOMAIN
, "cannot mount '%s'"),
288 * Determine if the mountpoint is empty. If so, refuse to perform the
289 * mount. We don't perform this check if MS_OVERLAY is specified, which
290 * would defeat the point. We also avoid this check if 'remount' is
293 if ((flags
& MS_OVERLAY
) == 0 &&
294 strstr(mntopts
, MNTOPT_REMOUNT
) == NULL
&&
295 !dir_is_empty(mountpoint
)) {
296 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
297 "directory is not empty"));
298 return (zfs_error_fmt(hdl
, EZFS_MOUNTFAILED
,
299 dgettext(TEXT_DOMAIN
, "cannot mount '%s'"), mountpoint
));
302 /* perform the mount */
303 if (mount(zfs_get_name(zhp
), mountpoint
, MS_OPTIONSTR
| flags
,
304 MNTTYPE_ZFS
, NULL
, 0, mntopts
, sizeof (mntopts
)) != 0) {
306 * Generic errors are nasty, but there are just way too many
307 * from mount(), and they're well-understood. We pick a few
308 * common ones to improve upon.
310 if (errno
== EBUSY
) {
311 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
312 "mountpoint or dataset is busy"));
313 } else if (errno
== EPERM
) {
314 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
315 "Insufficient privileges"));
316 } else if (errno
== ENOTSUP
) {
320 VERIFY(zfs_spa_version(zhp
, &spa_version
) == 0);
321 (void) snprintf(buf
, sizeof (buf
),
322 dgettext(TEXT_DOMAIN
, "Can't mount a version %lld "
323 "file system on a version %d pool. Pool must be"
324 " upgraded to mount this file system."),
325 (u_longlong_t
)zfs_prop_get_int(zhp
,
326 ZFS_PROP_VERSION
), spa_version
);
327 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, buf
));
329 zfs_error_aux(hdl
, strerror(errno
));
331 return (zfs_error_fmt(hdl
, EZFS_MOUNTFAILED
,
332 dgettext(TEXT_DOMAIN
, "cannot mount '%s'"),
336 /* add the mounted entry into our cache */
337 libzfs_mnttab_add(hdl
, zfs_get_name(zhp
), mountpoint
,
343 * Unmount a single filesystem.
346 unmount_one(libzfs_handle_t
*hdl
, const char *mountpoint
, int flags
)
348 if (umount2(mountpoint
, flags
) != 0) {
349 zfs_error_aux(hdl
, strerror(errno
));
350 return (zfs_error_fmt(hdl
, EZFS_UMOUNTFAILED
,
351 dgettext(TEXT_DOMAIN
, "cannot unmount '%s'"),
359 * Unmount the given filesystem.
362 zfs_unmount(zfs_handle_t
*zhp
, const char *mountpoint
, int flags
)
364 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
368 /* check to see if we need to unmount the filesystem */
369 if (mountpoint
!= NULL
|| ((zfs_get_type(zhp
) == ZFS_TYPE_FILESYSTEM
) &&
370 libzfs_mnttab_find(hdl
, zhp
->zfs_name
, &entry
) == 0)) {
372 * mountpoint may have come from a call to
373 * getmnt/getmntany if it isn't NULL. If it is NULL,
374 * we know it comes from libzfs_mnttab_find which can
375 * then get freed later. We strdup it to play it safe.
377 if (mountpoint
== NULL
)
378 mntpt
= zfs_strdup(hdl
, entry
.mnt_mountp
);
380 mntpt
= zfs_strdup(hdl
, mountpoint
);
383 * Unshare and unmount the filesystem
385 if (zfs_unshare_proto(zhp
, mntpt
, share_all_proto
) != 0)
388 if (unmount_one(hdl
, mntpt
, flags
) != 0) {
390 (void) zfs_shareall(zhp
);
393 libzfs_mnttab_remove(hdl
, zhp
->zfs_name
);
401 * Unmount this filesystem and any children inheriting the mountpoint property.
402 * To do this, just act like we're changing the mountpoint property, but don't
403 * remount the filesystems afterwards.
406 zfs_unmountall(zfs_handle_t
*zhp
, int flags
)
408 prop_changelist_t
*clp
;
411 clp
= changelist_gather(zhp
, ZFS_PROP_MOUNTPOINT
, 0, flags
);
415 ret
= changelist_prefix(clp
);
416 changelist_free(clp
);
422 zfs_is_shared(zfs_handle_t
*zhp
)
424 zfs_share_type_t rc
= 0;
425 zfs_share_proto_t
*curr_proto
;
427 if (ZFS_IS_VOLUME(zhp
))
430 for (curr_proto
= share_all_proto
; *curr_proto
!= PROTO_END
;
432 rc
|= zfs_is_shared_proto(zhp
, NULL
, *curr_proto
);
434 return (rc
? B_TRUE
: B_FALSE
);
438 zfs_share(zfs_handle_t
*zhp
)
440 if (ZFS_IS_VOLUME(zhp
))
443 return (zfs_share_proto(zhp
, share_all_proto
));
447 zfs_unshare(zfs_handle_t
*zhp
)
449 if (ZFS_IS_VOLUME(zhp
))
452 return (zfs_unshareall(zhp
));
456 * Check to see if the filesystem is currently shared.
459 zfs_is_shared_proto(zfs_handle_t
*zhp
, char **where
, zfs_share_proto_t proto
)
464 if (!zfs_is_mounted(zhp
, &mountpoint
))
465 return (SHARED_NOT_SHARED
);
467 if (rc
= is_shared(zhp
->zfs_hdl
, mountpoint
, proto
)) {
475 return (SHARED_NOT_SHARED
);
480 zfs_is_shared_nfs(zfs_handle_t
*zhp
, char **where
)
482 return (zfs_is_shared_proto(zhp
, where
,
483 PROTO_NFS
) != SHARED_NOT_SHARED
);
487 zfs_is_shared_smb(zfs_handle_t
*zhp
, char **where
)
489 return (zfs_is_shared_proto(zhp
, where
,
490 PROTO_SMB
) != SHARED_NOT_SHARED
);
494 * Make sure things will work if libshare isn't installed by using
495 * wrapper functions that check to see that the pointers to functions
496 * initialized in _zfs_init_libshare() are actually present.
499 static sa_handle_t (*_sa_init
)(int);
500 static void (*_sa_fini
)(sa_handle_t
);
501 static sa_share_t (*_sa_find_share
)(sa_handle_t
, char *);
502 static int (*_sa_enable_share
)(sa_share_t
, char *);
503 static int (*_sa_disable_share
)(sa_share_t
, char *);
504 static char *(*_sa_errorstr
)(int);
505 static int (*_sa_parse_legacy_options
)(sa_group_t
, char *, char *);
506 static boolean_t (*_sa_needs_refresh
)(sa_handle_t
*);
507 static libzfs_handle_t
*(*_sa_get_zfs_handle
)(sa_handle_t
);
508 static int (*_sa_zfs_process_share
)(sa_handle_t
, sa_group_t
, sa_share_t
,
509 char *, char *, zprop_source_t
, char *, char *, char *);
510 static void (*_sa_update_sharetab_ts
)(sa_handle_t
);
513 * _zfs_init_libshare()
515 * Find the libshare.so.1 entry points that we use here and save the
516 * values to be used later. This is triggered by the runtime loader.
517 * Make sure the correct ISA version is loaded.
520 #pragma init(_zfs_init_libshare)
522 _zfs_init_libshare(void)
525 char path
[MAXPATHLEN
];
529 if (sysinfo(SI_ARCHITECTURE_64
, isa
, MAXISALEN
) == -1)
534 (void) snprintf(path
, MAXPATHLEN
,
535 "/usr/lib/%s/libshare.so.1", isa
);
537 if ((libshare
= dlopen(path
, RTLD_LAZY
| RTLD_GLOBAL
)) != NULL
) {
538 _sa_init
= (sa_handle_t (*)(int))dlsym(libshare
, "sa_init");
539 _sa_fini
= (void (*)(sa_handle_t
))dlsym(libshare
, "sa_fini");
540 _sa_find_share
= (sa_share_t (*)(sa_handle_t
, char *))
541 dlsym(libshare
, "sa_find_share");
542 _sa_enable_share
= (int (*)(sa_share_t
, char *))dlsym(libshare
,
544 _sa_disable_share
= (int (*)(sa_share_t
, char *))dlsym(libshare
,
546 _sa_errorstr
= (char *(*)(int))dlsym(libshare
, "sa_errorstr");
547 _sa_parse_legacy_options
= (int (*)(sa_group_t
, char *, char *))
548 dlsym(libshare
, "sa_parse_legacy_options");
549 _sa_needs_refresh
= (boolean_t (*)(sa_handle_t
*))
550 dlsym(libshare
, "sa_needs_refresh");
551 _sa_get_zfs_handle
= (libzfs_handle_t
*(*)(sa_handle_t
))
552 dlsym(libshare
, "sa_get_zfs_handle");
553 _sa_zfs_process_share
= (int (*)(sa_handle_t
, sa_group_t
,
554 sa_share_t
, char *, char *, zprop_source_t
, char *,
555 char *, char *))dlsym(libshare
, "sa_zfs_process_share");
556 _sa_update_sharetab_ts
= (void (*)(sa_handle_t
))
557 dlsym(libshare
, "sa_update_sharetab_ts");
558 if (_sa_init
== NULL
|| _sa_fini
== NULL
||
559 _sa_find_share
== NULL
|| _sa_enable_share
== NULL
||
560 _sa_disable_share
== NULL
|| _sa_errorstr
== NULL
||
561 _sa_parse_legacy_options
== NULL
||
562 _sa_needs_refresh
== NULL
|| _sa_get_zfs_handle
== NULL
||
563 _sa_zfs_process_share
== NULL
||
564 _sa_update_sharetab_ts
== NULL
) {
567 _sa_disable_share
= NULL
;
568 _sa_enable_share
= NULL
;
570 _sa_parse_legacy_options
= NULL
;
571 (void) dlclose(libshare
);
572 _sa_needs_refresh
= NULL
;
573 _sa_get_zfs_handle
= NULL
;
574 _sa_zfs_process_share
= NULL
;
575 _sa_update_sharetab_ts
= NULL
;
581 * zfs_init_libshare(zhandle, service)
583 * Initialize the libshare API if it hasn't already been initialized.
584 * In all cases it returns 0 if it succeeded and an error if not. The
585 * service value is which part(s) of the API to initialize and is a
586 * direct map to the libshare sa_init(service) interface.
589 zfs_init_libshare(libzfs_handle_t
*zhandle
, int service
)
593 if (_sa_init
== NULL
)
596 if (ret
== SA_OK
&& zhandle
->libzfs_shareflags
& ZFSSHARE_MISS
) {
598 * We had a cache miss. Most likely it is a new ZFS
599 * dataset that was just created. We want to make sure
600 * so check timestamps to see if a different process
601 * has updated any of the configuration. If there was
602 * some non-ZFS change, we need to re-initialize the
605 zhandle
->libzfs_shareflags
&= ~ZFSSHARE_MISS
;
606 if (_sa_needs_refresh
!= NULL
&&
607 _sa_needs_refresh(zhandle
->libzfs_sharehdl
)) {
608 zfs_uninit_libshare(zhandle
);
609 zhandle
->libzfs_sharehdl
= _sa_init(service
);
613 if (ret
== SA_OK
&& zhandle
&& zhandle
->libzfs_sharehdl
== NULL
)
614 zhandle
->libzfs_sharehdl
= _sa_init(service
);
616 if (ret
== SA_OK
&& zhandle
->libzfs_sharehdl
== NULL
)
623 * zfs_uninit_libshare(zhandle)
625 * Uninitialize the libshare API if it hasn't already been
626 * uninitialized. It is OK to call multiple times.
629 zfs_uninit_libshare(libzfs_handle_t
*zhandle
)
631 if (zhandle
!= NULL
&& zhandle
->libzfs_sharehdl
!= NULL
) {
632 if (_sa_fini
!= NULL
)
633 _sa_fini(zhandle
->libzfs_sharehdl
);
634 zhandle
->libzfs_sharehdl
= NULL
;
639 * zfs_parse_options(options, proto)
641 * Call the legacy parse interface to get the protocol specific
642 * options using the NULL arg to indicate that this is a "parse" only.
645 zfs_parse_options(char *options
, zfs_share_proto_t proto
)
647 if (_sa_parse_legacy_options
!= NULL
) {
648 return (_sa_parse_legacy_options(NULL
, options
,
649 proto_table
[proto
].p_name
));
651 return (SA_CONFIG_ERR
);
655 * zfs_sa_find_share(handle, path)
657 * wrapper around sa_find_share to find a share path in the
661 zfs_sa_find_share(sa_handle_t handle
, char *path
)
663 if (_sa_find_share
!= NULL
)
664 return (_sa_find_share(handle
, path
));
669 * zfs_sa_enable_share(share, proto)
671 * Wrapper for sa_enable_share which enables a share for a specified
675 zfs_sa_enable_share(sa_share_t share
, char *proto
)
677 if (_sa_enable_share
!= NULL
)
678 return (_sa_enable_share(share
, proto
));
679 return (SA_CONFIG_ERR
);
683 * zfs_sa_disable_share(share, proto)
685 * Wrapper for sa_enable_share which disables a share for a specified
689 zfs_sa_disable_share(sa_share_t share
, char *proto
)
691 if (_sa_disable_share
!= NULL
)
692 return (_sa_disable_share(share
, proto
));
693 return (SA_CONFIG_ERR
);
697 * Share the given filesystem according to the options in the specified
698 * protocol specific properties (sharenfs, sharesmb). We rely
699 * on "libshare" to the dirty work for us.
702 zfs_share_proto(zfs_handle_t
*zhp
, zfs_share_proto_t
*proto
)
704 char mountpoint
[ZFS_MAXPROPLEN
];
705 char shareopts
[ZFS_MAXPROPLEN
];
706 char sourcestr
[ZFS_MAXPROPLEN
];
707 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
709 zfs_share_proto_t
*curr_proto
;
710 zprop_source_t sourcetype
;
713 if (!zfs_is_mountable(zhp
, mountpoint
, sizeof (mountpoint
), NULL
))
716 if ((ret
= zfs_init_libshare(hdl
, SA_INIT_SHARE_API
)) != SA_OK
) {
717 (void) zfs_error_fmt(hdl
, EZFS_SHARENFSFAILED
,
718 dgettext(TEXT_DOMAIN
, "cannot share '%s': %s"),
719 zfs_get_name(zhp
), _sa_errorstr
!= NULL
?
720 _sa_errorstr(ret
) : "");
724 for (curr_proto
= proto
; *curr_proto
!= PROTO_END
; curr_proto
++) {
726 * Return success if there are no share options.
728 if (zfs_prop_get(zhp
, proto_table
[*curr_proto
].p_prop
,
729 shareopts
, sizeof (shareopts
), &sourcetype
, sourcestr
,
730 ZFS_MAXPROPLEN
, B_FALSE
) != 0 ||
731 strcmp(shareopts
, "off") == 0)
735 * If the 'zoned' property is set, then zfs_is_mountable()
736 * will have already bailed out if we are in the global zone.
737 * But local zones cannot be NFS servers, so we ignore it for
738 * local zones as well.
740 if (zfs_prop_get_int(zhp
, ZFS_PROP_ZONED
))
743 share
= zfs_sa_find_share(hdl
->libzfs_sharehdl
, mountpoint
);
746 * This may be a new file system that was just
747 * created so isn't in the internal cache
748 * (second time through). Rather than
749 * reloading the entire configuration, we can
750 * assume ZFS has done the checking and it is
751 * safe to add this to the internal
754 if (_sa_zfs_process_share(hdl
->libzfs_sharehdl
,
755 NULL
, NULL
, mountpoint
,
756 proto_table
[*curr_proto
].p_name
, sourcetype
,
757 shareopts
, sourcestr
, zhp
->zfs_name
) != SA_OK
) {
758 (void) zfs_error_fmt(hdl
,
759 proto_table
[*curr_proto
].p_share_err
,
760 dgettext(TEXT_DOMAIN
, "cannot share '%s'"),
764 hdl
->libzfs_shareflags
|= ZFSSHARE_MISS
;
765 share
= zfs_sa_find_share(hdl
->libzfs_sharehdl
,
770 err
= zfs_sa_enable_share(share
,
771 proto_table
[*curr_proto
].p_name
);
773 (void) zfs_error_fmt(hdl
,
774 proto_table
[*curr_proto
].p_share_err
,
775 dgettext(TEXT_DOMAIN
, "cannot share '%s'"),
780 (void) zfs_error_fmt(hdl
,
781 proto_table
[*curr_proto
].p_share_err
,
782 dgettext(TEXT_DOMAIN
, "cannot share '%s'"),
793 zfs_share_nfs(zfs_handle_t
*zhp
)
795 return (zfs_share_proto(zhp
, nfs_only
));
799 zfs_share_smb(zfs_handle_t
*zhp
)
801 return (zfs_share_proto(zhp
, smb_only
));
805 zfs_shareall(zfs_handle_t
*zhp
)
807 return (zfs_share_proto(zhp
, share_all_proto
));
811 * Unshare a filesystem by mountpoint.
814 unshare_one(libzfs_handle_t
*hdl
, const char *name
, const char *mountpoint
,
815 zfs_share_proto_t proto
)
821 * Mountpoint could get trashed if libshare calls getmntany
822 * which it does during API initialization, so strdup the
825 mntpt
= zfs_strdup(hdl
, mountpoint
);
827 /* make sure libshare initialized */
828 if ((err
= zfs_init_libshare(hdl
, SA_INIT_SHARE_API
)) != SA_OK
) {
829 free(mntpt
); /* don't need the copy anymore */
830 return (zfs_error_fmt(hdl
, EZFS_SHARENFSFAILED
,
831 dgettext(TEXT_DOMAIN
, "cannot unshare '%s': %s"),
832 name
, _sa_errorstr(err
)));
835 share
= zfs_sa_find_share(hdl
->libzfs_sharehdl
, mntpt
);
836 free(mntpt
); /* don't need the copy anymore */
839 err
= zfs_sa_disable_share(share
, proto_table
[proto
].p_name
);
841 return (zfs_error_fmt(hdl
, EZFS_UNSHARENFSFAILED
,
842 dgettext(TEXT_DOMAIN
, "cannot unshare '%s': %s"),
843 name
, _sa_errorstr(err
)));
846 return (zfs_error_fmt(hdl
, EZFS_UNSHARENFSFAILED
,
847 dgettext(TEXT_DOMAIN
, "cannot unshare '%s': not found"),
854 * Unshare the given filesystem.
857 zfs_unshare_proto(zfs_handle_t
*zhp
, const char *mountpoint
,
858 zfs_share_proto_t
*proto
)
860 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
864 /* check to see if need to unmount the filesystem */
865 rewind(zhp
->zfs_hdl
->libzfs_mnttab
);
866 if (mountpoint
!= NULL
)
867 mountpoint
= mntpt
= zfs_strdup(hdl
, mountpoint
);
869 if (mountpoint
!= NULL
|| ((zfs_get_type(zhp
) == ZFS_TYPE_FILESYSTEM
) &&
870 libzfs_mnttab_find(hdl
, zfs_get_name(zhp
), &entry
) == 0)) {
871 zfs_share_proto_t
*curr_proto
;
873 if (mountpoint
== NULL
)
874 mntpt
= zfs_strdup(zhp
->zfs_hdl
, entry
.mnt_mountp
);
876 for (curr_proto
= proto
; *curr_proto
!= PROTO_END
;
879 if (is_shared(hdl
, mntpt
, *curr_proto
) &&
880 unshare_one(hdl
, zhp
->zfs_name
,
881 mntpt
, *curr_proto
) != 0) {
895 zfs_unshare_nfs(zfs_handle_t
*zhp
, const char *mountpoint
)
897 return (zfs_unshare_proto(zhp
, mountpoint
, nfs_only
));
901 zfs_unshare_smb(zfs_handle_t
*zhp
, const char *mountpoint
)
903 return (zfs_unshare_proto(zhp
, mountpoint
, smb_only
));
907 * Same as zfs_unmountall(), but for NFS and SMB unshares.
910 zfs_unshareall_proto(zfs_handle_t
*zhp
, zfs_share_proto_t
*proto
)
912 prop_changelist_t
*clp
;
915 clp
= changelist_gather(zhp
, ZFS_PROP_SHARENFS
, 0, 0);
919 ret
= changelist_unshare(clp
, proto
);
920 changelist_free(clp
);
926 zfs_unshareall_nfs(zfs_handle_t
*zhp
)
928 return (zfs_unshareall_proto(zhp
, nfs_only
));
932 zfs_unshareall_smb(zfs_handle_t
*zhp
)
934 return (zfs_unshareall_proto(zhp
, smb_only
));
938 zfs_unshareall(zfs_handle_t
*zhp
)
940 return (zfs_unshareall_proto(zhp
, share_all_proto
));
944 zfs_unshareall_bypath(zfs_handle_t
*zhp
, const char *mountpoint
)
946 return (zfs_unshare_proto(zhp
, mountpoint
, share_all_proto
));
950 * Remove the mountpoint associated with the current dataset, if necessary.
951 * We only remove the underlying directory if:
953 * - The mountpoint is not 'none' or 'legacy'
954 * - The mountpoint is non-empty
955 * - The mountpoint is the default or inherited
956 * - The 'zoned' property is set, or we're in a local zone
958 * Any other directories we leave alone.
961 remove_mountpoint(zfs_handle_t
*zhp
)
963 char mountpoint
[ZFS_MAXPROPLEN
];
964 zprop_source_t source
;
966 if (!zfs_is_mountable(zhp
, mountpoint
, sizeof (mountpoint
),
970 if (source
== ZPROP_SRC_DEFAULT
||
971 source
== ZPROP_SRC_INHERITED
) {
973 * Try to remove the directory, silently ignoring any errors.
974 * The filesystem may have since been removed or moved around,
975 * and this error isn't really useful to the administrator in
978 (void) rmdir(mountpoint
);
982 typedef struct mount_cbdata
{
983 zfs_handle_t
**cb_datasets
;
989 mount_cb(zfs_handle_t
*zhp
, void *data
)
991 mount_cbdata_t
*cbp
= data
;
993 if (!(zfs_get_type(zhp
) & (ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
))) {
998 if (zfs_prop_get_int(zhp
, ZFS_PROP_CANMOUNT
) == ZFS_CANMOUNT_NOAUTO
) {
1003 if (cbp
->cb_alloc
== cbp
->cb_used
) {
1006 if ((ptr
= zfs_realloc(zhp
->zfs_hdl
,
1007 cbp
->cb_datasets
, cbp
->cb_alloc
* sizeof (void *),
1008 cbp
->cb_alloc
* 2 * sizeof (void *))) == NULL
)
1010 cbp
->cb_datasets
= ptr
;
1015 cbp
->cb_datasets
[cbp
->cb_used
++] = zhp
;
1017 return (zfs_iter_filesystems(zhp
, mount_cb
, cbp
));
1021 dataset_cmp(const void *a
, const void *b
)
1023 zfs_handle_t
**za
= (zfs_handle_t
**)a
;
1024 zfs_handle_t
**zb
= (zfs_handle_t
**)b
;
1025 char mounta
[MAXPATHLEN
];
1026 char mountb
[MAXPATHLEN
];
1027 boolean_t gota
, gotb
;
1029 if ((gota
= (zfs_get_type(*za
) == ZFS_TYPE_FILESYSTEM
)) != 0)
1030 verify(zfs_prop_get(*za
, ZFS_PROP_MOUNTPOINT
, mounta
,
1031 sizeof (mounta
), NULL
, NULL
, 0, B_FALSE
) == 0);
1032 if ((gotb
= (zfs_get_type(*zb
) == ZFS_TYPE_FILESYSTEM
)) != 0)
1033 verify(zfs_prop_get(*zb
, ZFS_PROP_MOUNTPOINT
, mountb
,
1034 sizeof (mountb
), NULL
, NULL
, 0, B_FALSE
) == 0);
1037 return (strcmp(mounta
, mountb
));
1044 return (strcmp(zfs_get_name(a
), zfs_get_name(b
)));
1048 * Mount and share all datasets within the given pool. This assumes that no
1049 * datasets within the pool are currently mounted. Because users can create
1050 * complicated nested hierarchies of mountpoints, we first gather all the
1051 * datasets and mountpoints within the pool, and sort them by mountpoint. Once
1052 * we have the list of all filesystems, we iterate over them in order and mount
1053 * and/or share each one.
1055 #pragma weak zpool_mount_datasets = zpool_enable_datasets
1057 zpool_enable_datasets(zpool_handle_t
*zhp
, const char *mntopts
, int flags
)
1059 mount_cbdata_t cb
= { 0 };
1060 libzfs_handle_t
*hdl
= zhp
->zpool_hdl
;
1066 * Gather all non-snap datasets within the pool.
1068 if ((cb
.cb_datasets
= zfs_alloc(hdl
, 4 * sizeof (void *))) == NULL
)
1072 if ((zfsp
= zfs_open(hdl
, zhp
->zpool_name
, ZFS_TYPE_DATASET
)) == NULL
)
1075 cb
.cb_datasets
[0] = zfsp
;
1078 if (zfs_iter_filesystems(zfsp
, mount_cb
, &cb
) != 0)
1082 * Sort the datasets by mountpoint.
1084 qsort(cb
.cb_datasets
, cb
.cb_used
, sizeof (void *), dataset_cmp
);
1087 * And mount all the datasets, keeping track of which ones
1088 * succeeded or failed.
1090 if ((good
= zfs_alloc(zhp
->zpool_hdl
,
1091 cb
.cb_used
* sizeof (int))) == NULL
)
1095 for (i
= 0; i
< cb
.cb_used
; i
++) {
1096 if (zfs_mount(cb
.cb_datasets
[i
], mntopts
, flags
) != 0)
1103 * Then share all the ones that need to be shared. This needs
1104 * to be a separate pass in order to avoid excessive reloading
1105 * of the configuration. Good should never be NULL since
1106 * zfs_alloc is supposed to exit if memory isn't available.
1108 for (i
= 0; i
< cb
.cb_used
; i
++) {
1109 if (good
[i
] && zfs_share(cb
.cb_datasets
[i
]) != 0)
1116 for (i
= 0; i
< cb
.cb_used
; i
++)
1117 zfs_close(cb
.cb_datasets
[i
]);
1118 free(cb
.cb_datasets
);
1124 mountpoint_compare(const void *a
, const void *b
)
1126 const char *mounta
= *((char **)a
);
1127 const char *mountb
= *((char **)b
);
1129 return (strcmp(mountb
, mounta
));
1132 /* alias for 2002/240 */
1133 #pragma weak zpool_unmount_datasets = zpool_disable_datasets
1135 * Unshare and unmount all datasets within the given pool. We don't want to
1136 * rely on traversing the DSL to discover the filesystems within the pool,
1137 * because this may be expensive (if not all of them are mounted), and can fail
1138 * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and
1139 * gather all the filesystems that are currently mounted.
1142 zpool_disable_datasets(zpool_handle_t
*zhp
, boolean_t force
)
1145 struct mnttab entry
;
1147 char **mountpoints
= NULL
;
1148 zfs_handle_t
**datasets
= NULL
;
1149 libzfs_handle_t
*hdl
= zhp
->zpool_hdl
;
1152 int flags
= (force
? MS_FORCE
: 0);
1154 namelen
= strlen(zhp
->zpool_name
);
1156 rewind(hdl
->libzfs_mnttab
);
1158 while (getmntent(hdl
->libzfs_mnttab
, &entry
) == 0) {
1160 * Ignore non-ZFS entries.
1162 if (entry
.mnt_fstype
== NULL
||
1163 strcmp(entry
.mnt_fstype
, MNTTYPE_ZFS
) != 0)
1167 * Ignore filesystems not within this pool.
1169 if (entry
.mnt_mountp
== NULL
||
1170 strncmp(entry
.mnt_special
, zhp
->zpool_name
, namelen
) != 0 ||
1171 (entry
.mnt_special
[namelen
] != '/' &&
1172 entry
.mnt_special
[namelen
] != '\0'))
1176 * At this point we've found a filesystem within our pool. Add
1177 * it to our growing list.
1179 if (used
== alloc
) {
1181 if ((mountpoints
= zfs_alloc(hdl
,
1182 8 * sizeof (void *))) == NULL
)
1185 if ((datasets
= zfs_alloc(hdl
,
1186 8 * sizeof (void *))) == NULL
)
1193 if ((ptr
= zfs_realloc(hdl
, mountpoints
,
1194 alloc
* sizeof (void *),
1195 alloc
* 2 * sizeof (void *))) == NULL
)
1199 if ((ptr
= zfs_realloc(hdl
, datasets
,
1200 alloc
* sizeof (void *),
1201 alloc
* 2 * sizeof (void *))) == NULL
)
1209 if ((mountpoints
[used
] = zfs_strdup(hdl
,
1210 entry
.mnt_mountp
)) == NULL
)
1214 * This is allowed to fail, in case there is some I/O error. It
1215 * is only used to determine if we need to remove the underlying
1216 * mountpoint, so failure is not fatal.
1218 datasets
[used
] = make_dataset_handle(hdl
, entry
.mnt_special
);
1224 * At this point, we have the entire list of filesystems, so sort it by
1227 qsort(mountpoints
, used
, sizeof (char *), mountpoint_compare
);
1230 * Walk through and first unshare everything.
1232 for (i
= 0; i
< used
; i
++) {
1233 zfs_share_proto_t
*curr_proto
;
1234 for (curr_proto
= share_all_proto
; *curr_proto
!= PROTO_END
;
1236 if (is_shared(hdl
, mountpoints
[i
], *curr_proto
) &&
1237 unshare_one(hdl
, mountpoints
[i
],
1238 mountpoints
[i
], *curr_proto
) != 0)
1244 * Now unmount everything, removing the underlying directories as
1247 for (i
= 0; i
< used
; i
++) {
1248 if (unmount_one(hdl
, mountpoints
[i
], flags
) != 0)
1252 for (i
= 0; i
< used
; i
++) {
1254 remove_mountpoint(datasets
[i
]);
1259 for (i
= 0; i
< used
; i
++) {
1261 zfs_close(datasets
[i
]);
1262 free(mountpoints
[i
]);