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>
75 #ifdef HAVE_LIBSELINUX
76 #include <selinux/selinux.h>
77 #endif /* HAVE_LIBSELINUX */
81 #include "libzfs_impl.h"
84 #include <sys/systeminfo.h>
85 #define MAXISALEN 257 /* based on sysinfo(2) man page */
87 static int zfs_share_proto(zfs_handle_t
*, zfs_share_proto_t
*);
88 zfs_share_type_t
zfs_is_shared_proto(zfs_handle_t
*, char **,
92 * The share protocols table must be in the same order as the zfs_share_prot_t
93 * enum in libzfs_impl.h
102 proto_table_t proto_table
[PROTO_END
] = {
103 {ZFS_PROP_SHARENFS
, "nfs", EZFS_SHARENFSFAILED
, EZFS_UNSHARENFSFAILED
},
104 {ZFS_PROP_SHARESMB
, "smb", EZFS_SHARESMBFAILED
, EZFS_UNSHARESMBFAILED
},
107 zfs_share_proto_t nfs_only
[] = {
112 zfs_share_proto_t smb_only
[] = {
116 zfs_share_proto_t share_all_proto
[] = {
123 * Search for NFS and SMB exports for the given mountpoint and protocol, returning
124 * a zfs_share_type_t value.
126 static zfs_share_type_t
127 is_shared(libzfs_handle_t
*hdl
, const char *mountpoint
, zfs_share_proto_t proto
)
129 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 /* Search /etc/exports for NFS exports */
137 /* FIXME: Assumes the file is tab delimited. */
138 while (fgets(buf
, sizeof (buf
), hdl
->libzfs_sharetab
) != NULL
) {
140 /* the mountpoint is the first entry on each line */
141 if ((tab
= strchr(buf
, '\t')) == NULL
)
145 if (strcmp(buf
, mountpoint
) == 0) {
146 if (proto
== PROTO_NFS
)
149 return (SHARED_NOT_SHARED
);
153 /* XXX: Search /etc/samba/smb.conf for SMB exports, return SHARED_SMB */
155 return (SHARED_NOT_SHARED
);
159 * Returns true if the specified directory is empty. If we can't open the
160 * directory at all, return true so that the mount can fail with a more
161 * informative error message.
164 dir_is_empty(const char *dirname
)
169 if ((dirp
= opendir(dirname
)) == NULL
)
172 while ((dp
= readdir64(dirp
)) != NULL
) {
174 if (strcmp(dp
->d_name
, ".") == 0 ||
175 strcmp(dp
->d_name
, "..") == 0)
178 (void) closedir(dirp
);
182 (void) closedir(dirp
);
187 * Checks to see if the mount is active. If the filesystem is mounted, we fill
188 * in 'where' with the current mountpoint, and return 1. Otherwise, we return
192 is_mounted(libzfs_handle_t
*zfs_hdl
, const char *special
, char **where
)
196 if (libzfs_mnttab_find(zfs_hdl
, special
, &entry
) != 0)
200 *where
= zfs_strdup(zfs_hdl
, entry
.mnt_mountp
);
206 zfs_is_mounted(zfs_handle_t
*zhp
, char **where
)
208 return (is_mounted(zhp
->zfs_hdl
, zfs_get_name(zhp
), where
));
212 * Returns true if the given dataset is mountable, false otherwise. Returns the
213 * mountpoint in 'buf'.
216 zfs_is_mountable(zfs_handle_t
*zhp
, char *buf
, size_t buflen
,
217 zprop_source_t
*source
)
219 char sourceloc
[ZFS_MAXNAMELEN
];
220 zprop_source_t sourcetype
;
222 if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT
, zhp
->zfs_type
))
225 verify(zfs_prop_get(zhp
, ZFS_PROP_MOUNTPOINT
, buf
, buflen
,
226 &sourcetype
, sourceloc
, sizeof (sourceloc
), B_FALSE
) == 0);
228 if (strcmp(buf
, ZFS_MOUNTPOINT_NONE
) == 0 ||
229 strcmp(buf
, ZFS_MOUNTPOINT_LEGACY
) == 0)
232 if (zfs_prop_get_int(zhp
, ZFS_PROP_CANMOUNT
) == ZFS_CANMOUNT_OFF
)
235 if (zfs_prop_get_int(zhp
, ZFS_PROP_ZONED
) &&
236 getzoneid() == GLOBAL_ZONEID
)
240 *source
= sourcetype
;
246 * The filesystem is mounted by invoking the system mount utility rather
247 * than by the system call mount(2). This ensures that the /etc/mtab
248 * file is correctly locked for the update. Performing our own locking
249 * and /etc/mtab update requires making an unsafe assumption about how
250 * the mount utility performs its locking. Unfortunately, this also means
251 * in the case of a mount failure we do not have the exact errno. We must
252 * make due with return value from the mount process.
254 * In the long term a shared library called libmount is under development
255 * which provides a common API to address the locking and errno issues.
256 * Once the standard mount utility has been updated to use this library
257 * we can add an autoconf check to conditionally use it.
259 * http://www.kernel.org/pub/linux/utils/util-linux/libmount-docs/index.html
263 do_mount(const char *src
, const char *mntpt
, char *opts
)
274 /* Return only the most critical mount error */
275 rc
= libzfs_run_process(argv
[0], argv
);
277 if (rc
& MOUNT_FILEIO
)
281 if (rc
& MOUNT_SOFTWARE
)
283 if (rc
& MOUNT_SYSERR
)
285 if (rc
& MOUNT_USAGE
)
288 return ENXIO
; /* Generic error */
295 do_unmount(const char *mntpt
, int flags
)
297 char force_opt
[] = "-f";
298 char lazy_opt
[] = "-l";
302 NULL
, NULL
, NULL
, NULL
};
305 if (flags
& MS_FORCE
) {
306 argv
[count
] = force_opt
;
310 if (flags
& MS_DETACH
) {
311 argv
[count
] = lazy_opt
;
315 argv
[count
] = (char *)mntpt
;
316 rc
= libzfs_run_process(argv
[0], argv
);
318 return (rc
? EINVAL
: 0);
322 * Mount the given filesystem.
325 zfs_mount(zfs_handle_t
*zhp
, const char *options
, int flags
)
328 char mountpoint
[ZFS_MAXPROPLEN
];
329 char mntopts
[MNT_LINE_MAX
];
330 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
334 (void) strlcpy(mntopts
, MNTOPT_DEFAULTS
, sizeof (mntopts
));
336 (void) strlcpy(mntopts
, options
, sizeof (mntopts
));
339 * If the pool is imported read-only then all mounts must be read-only
341 if (zpool_get_prop_int(zhp
->zpool_hdl
, ZPOOL_PROP_READONLY
, NULL
))
342 (void) strlcat(mntopts
, "," MNTOPT_RO
, sizeof (mntopts
));
345 * Append zfsutil option so the mount helper allow the mount
347 strlcat(mntopts
, "," MNTOPT_ZFSUTIL
, sizeof (mntopts
));
349 #ifdef HAVE_LIBSELINUX
350 if (is_selinux_enabled())
351 (void) strlcat(mntopts
, ",context=\"system_u:"
352 "object_r:file_t:s0\"", sizeof (mntopts
));
353 #endif /* HAVE_LIBSELINUX */
355 if (!zfs_is_mountable(zhp
, mountpoint
, sizeof (mountpoint
), NULL
))
358 /* Create the directory if it doesn't already exist */
359 if (lstat(mountpoint
, &buf
) != 0) {
360 if (mkdirp(mountpoint
, 0755) != 0) {
361 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
362 "failed to create mountpoint"));
363 return (zfs_error_fmt(hdl
, EZFS_MOUNTFAILED
,
364 dgettext(TEXT_DOMAIN
, "cannot mount '%s'"),
370 * Determine if the mountpoint is empty. If so, refuse to perform the
371 * mount. We don't perform this check if 'remount' is specified.
373 if (strstr(mntopts
, MNTOPT_REMOUNT
) == NULL
&&
374 !dir_is_empty(mountpoint
)) {
375 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
376 "directory is not empty"));
377 return (zfs_error_fmt(hdl
, EZFS_MOUNTFAILED
,
378 dgettext(TEXT_DOMAIN
, "cannot mount '%s'"), mountpoint
));
381 /* perform the mount */
382 rc
= do_mount(zfs_get_name(zhp
), mountpoint
, mntopts
);
385 * Generic errors are nasty, but there are just way too many
386 * from mount(), and they're well-understood. We pick a few
387 * common ones to improve upon.
390 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
391 "mountpoint or dataset is busy"));
392 } else if (rc
== EPERM
) {
393 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
394 "Insufficient privileges"));
395 } else if (rc
== ENOTSUP
) {
399 VERIFY(zfs_spa_version(zhp
, &spa_version
) == 0);
400 (void) snprintf(buf
, sizeof (buf
),
401 dgettext(TEXT_DOMAIN
, "Can't mount a version %lld "
402 "file system on a version %d pool. Pool must be"
403 " upgraded to mount this file system."),
404 (u_longlong_t
)zfs_prop_get_int(zhp
,
405 ZFS_PROP_VERSION
), spa_version
);
406 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, buf
));
408 zfs_error_aux(hdl
, strerror(rc
));
410 return (zfs_error_fmt(hdl
, EZFS_MOUNTFAILED
,
411 dgettext(TEXT_DOMAIN
, "cannot mount '%s'"),
415 /* add the mounted entry into our cache */
416 libzfs_mnttab_add(hdl
, zfs_get_name(zhp
), mountpoint
, mntopts
);
421 * Unmount a single filesystem.
424 unmount_one(libzfs_handle_t
*hdl
, const char *mountpoint
, int flags
)
426 if (do_unmount(mountpoint
, flags
) != 0) {
427 zfs_error_aux(hdl
, strerror(errno
));
428 return (zfs_error_fmt(hdl
, EZFS_UMOUNTFAILED
,
429 dgettext(TEXT_DOMAIN
, "cannot unmount '%s'"),
437 * Unmount the given filesystem.
440 zfs_unmount(zfs_handle_t
*zhp
, const char *mountpoint
, int flags
)
442 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
446 /* check to see if we need to unmount the filesystem */
447 if (mountpoint
!= NULL
|| ((zfs_get_type(zhp
) == ZFS_TYPE_FILESYSTEM
) &&
448 libzfs_mnttab_find(hdl
, zhp
->zfs_name
, &entry
) == 0)) {
450 * mountpoint may have come from a call to
451 * getmnt/getmntany if it isn't NULL. If it is NULL,
452 * we know it comes from libzfs_mnttab_find which can
453 * then get freed later. We strdup it to play it safe.
455 if (mountpoint
== NULL
)
456 mntpt
= zfs_strdup(hdl
, entry
.mnt_mountp
);
458 mntpt
= zfs_strdup(hdl
, mountpoint
);
461 * Unshare and unmount the filesystem
463 if (zfs_unshare_proto(zhp
, mntpt
, share_all_proto
) != 0)
466 if (unmount_one(hdl
, mntpt
, flags
) != 0) {
468 (void) zfs_shareall(zhp
);
471 libzfs_mnttab_remove(hdl
, zhp
->zfs_name
);
479 * Unmount this filesystem and any children inheriting the mountpoint property.
480 * To do this, just act like we're changing the mountpoint property, but don't
481 * remount the filesystems afterwards.
484 zfs_unmountall(zfs_handle_t
*zhp
, int flags
)
486 prop_changelist_t
*clp
;
489 clp
= changelist_gather(zhp
, ZFS_PROP_MOUNTPOINT
, 0, flags
);
493 ret
= changelist_prefix(clp
);
494 changelist_free(clp
);
500 zfs_is_shared(zfs_handle_t
*zhp
)
502 zfs_share_type_t rc
= 0;
503 zfs_share_proto_t
*curr_proto
;
505 if (ZFS_IS_VOLUME(zhp
))
508 for (curr_proto
= share_all_proto
; *curr_proto
!= PROTO_END
;
510 rc
|= zfs_is_shared_proto(zhp
, NULL
, *curr_proto
);
512 return (rc
? B_TRUE
: B_FALSE
);
516 zfs_share(zfs_handle_t
*zhp
)
518 assert(!ZFS_IS_VOLUME(zhp
));
519 return (zfs_share_proto(zhp
, share_all_proto
));
523 zfs_unshare(zfs_handle_t
*zhp
)
525 assert(!ZFS_IS_VOLUME(zhp
));
526 return (zfs_unshareall(zhp
));
530 * Check to see if the filesystem is currently shared.
533 zfs_is_shared_proto(zfs_handle_t
*zhp
, char **where
, zfs_share_proto_t proto
)
538 if (!zfs_is_mounted(zhp
, &mountpoint
))
539 return (SHARED_NOT_SHARED
);
541 if ((rc
= is_shared(zhp
->zfs_hdl
, mountpoint
, proto
))) {
549 return (SHARED_NOT_SHARED
);
554 zfs_is_shared_nfs(zfs_handle_t
*zhp
, char **where
)
556 return (zfs_is_shared_proto(zhp
, where
,
557 PROTO_NFS
) != SHARED_NOT_SHARED
);
561 zfs_is_shared_smb(zfs_handle_t
*zhp
, char **where
)
563 return (zfs_is_shared_proto(zhp
, where
,
564 PROTO_SMB
) != SHARED_NOT_SHARED
);
568 * Make sure things will work if libshare isn't installed by using
569 * wrapper functions that check to see that the pointers to functions
570 * initialized in _zfs_init_libshare() are actually present.
573 static sa_handle_t (*_sa_init
)(int);
574 static void (*_sa_fini
)(sa_handle_t
);
575 static sa_share_t (*_sa_find_share
)(sa_handle_t
, char *);
576 static int (*_sa_enable_share
)(sa_share_t
, char *);
577 static int (*_sa_disable_share
)(sa_share_t
, char *);
578 static char *(*_sa_errorstr
)(int);
579 static int (*_sa_parse_legacy_options
)(sa_group_t
, char *, char *);
580 static boolean_t (*_sa_needs_refresh
)(sa_handle_t
*);
581 static libzfs_handle_t
*(*_sa_get_zfs_handle
)(sa_handle_t
);
582 static int (*_sa_zfs_process_share
)(sa_handle_t
, sa_group_t
, sa_share_t
,
583 char *, char *, zprop_source_t
, char *, char *, char *);
584 static void (*_sa_update_sharetab_ts
)(sa_handle_t
);
587 * _zfs_init_libshare()
589 * Find the libshare.so.1 entry points that we use here and save the
590 * values to be used later. This is triggered by the runtime loader.
591 * Make sure the correct ISA version is loaded.
595 _zfs_init_libshare(void) __attribute__((constructor
));
597 #pragma init(_zfs_init_libshare)
600 _zfs_init_libshare(void)
603 char path
[MAXPATHLEN
];
607 if (sysinfo(SI_ARCHITECTURE_64
, isa
, MAXISALEN
) == -1)
612 (void) snprintf(path
, MAXPATHLEN
,
613 "/usr/lib/%s/libshare.so.1", isa
);
615 if ((libshare
= dlopen(path
, RTLD_LAZY
| RTLD_GLOBAL
)) != NULL
) {
616 _sa_init
= (sa_handle_t (*)(int))dlsym(libshare
, "sa_init");
617 _sa_fini
= (void (*)(sa_handle_t
))dlsym(libshare
, "sa_fini");
618 _sa_find_share
= (sa_share_t (*)(sa_handle_t
, char *))
619 dlsym(libshare
, "sa_find_share");
620 _sa_enable_share
= (int (*)(sa_share_t
, char *))dlsym(libshare
,
622 _sa_disable_share
= (int (*)(sa_share_t
, char *))dlsym(libshare
,
624 _sa_errorstr
= (char *(*)(int))dlsym(libshare
, "sa_errorstr");
625 _sa_parse_legacy_options
= (int (*)(sa_group_t
, char *, char *))
626 dlsym(libshare
, "sa_parse_legacy_options");
627 _sa_needs_refresh
= (boolean_t (*)(sa_handle_t
*))
628 dlsym(libshare
, "sa_needs_refresh");
629 _sa_get_zfs_handle
= (libzfs_handle_t
*(*)(sa_handle_t
))
630 dlsym(libshare
, "sa_get_zfs_handle");
631 _sa_zfs_process_share
= (int (*)(sa_handle_t
, sa_group_t
,
632 sa_share_t
, char *, char *, zprop_source_t
, char *,
633 char *, char *))dlsym(libshare
, "sa_zfs_process_share");
634 _sa_update_sharetab_ts
= (void (*)(sa_handle_t
))
635 dlsym(libshare
, "sa_update_sharetab_ts");
636 if (_sa_init
== NULL
|| _sa_fini
== NULL
||
637 _sa_find_share
== NULL
|| _sa_enable_share
== NULL
||
638 _sa_disable_share
== NULL
|| _sa_errorstr
== NULL
||
639 _sa_parse_legacy_options
== NULL
||
640 _sa_needs_refresh
== NULL
|| _sa_get_zfs_handle
== NULL
||
641 _sa_zfs_process_share
== NULL
||
642 _sa_update_sharetab_ts
== NULL
) {
645 _sa_disable_share
= NULL
;
646 _sa_enable_share
= NULL
;
648 _sa_parse_legacy_options
= NULL
;
649 (void) dlclose(libshare
);
650 _sa_needs_refresh
= NULL
;
651 _sa_get_zfs_handle
= NULL
;
652 _sa_zfs_process_share
= NULL
;
653 _sa_update_sharetab_ts
= NULL
;
659 * zfs_init_libshare(zhandle, service)
661 * Initialize the libshare API if it hasn't already been initialized.
662 * In all cases it returns 0 if it succeeded and an error if not. The
663 * service value is which part(s) of the API to initialize and is a
664 * direct map to the libshare sa_init(service) interface.
667 zfs_init_libshare(libzfs_handle_t
*zhandle
, int service
)
671 if (_sa_init
== NULL
)
674 if (ret
== SA_OK
&& zhandle
->libzfs_shareflags
& ZFSSHARE_MISS
) {
676 * We had a cache miss. Most likely it is a new ZFS
677 * dataset that was just created. We want to make sure
678 * so check timestamps to see if a different process
679 * has updated any of the configuration. If there was
680 * some non-ZFS change, we need to re-initialize the
683 zhandle
->libzfs_shareflags
&= ~ZFSSHARE_MISS
;
684 if (_sa_needs_refresh
!= NULL
&&
685 _sa_needs_refresh(zhandle
->libzfs_sharehdl
)) {
686 zfs_uninit_libshare(zhandle
);
687 zhandle
->libzfs_sharehdl
= _sa_init(service
);
691 if (ret
== SA_OK
&& zhandle
&& zhandle
->libzfs_sharehdl
== NULL
)
692 zhandle
->libzfs_sharehdl
= _sa_init(service
);
694 if (ret
== SA_OK
&& zhandle
->libzfs_sharehdl
== NULL
)
701 * zfs_uninit_libshare(zhandle)
703 * Uninitialize the libshare API if it hasn't already been
704 * uninitialized. It is OK to call multiple times.
707 zfs_uninit_libshare(libzfs_handle_t
*zhandle
)
709 if (zhandle
!= NULL
&& zhandle
->libzfs_sharehdl
!= NULL
) {
710 if (_sa_fini
!= NULL
)
711 _sa_fini(zhandle
->libzfs_sharehdl
);
712 zhandle
->libzfs_sharehdl
= NULL
;
717 * zfs_parse_options(options, proto)
719 * Call the legacy parse interface to get the protocol specific
720 * options using the NULL arg to indicate that this is a "parse" only.
723 zfs_parse_options(char *options
, zfs_share_proto_t proto
)
725 if (_sa_parse_legacy_options
!= NULL
) {
726 return (_sa_parse_legacy_options(NULL
, options
,
727 proto_table
[proto
].p_name
));
729 return (SA_CONFIG_ERR
);
733 * zfs_sa_find_share(handle, path)
735 * wrapper around sa_find_share to find a share path in the
739 zfs_sa_find_share(sa_handle_t handle
, char *path
)
741 if (_sa_find_share
!= NULL
)
742 return (_sa_find_share(handle
, path
));
747 * zfs_sa_enable_share(share, proto)
749 * Wrapper for sa_enable_share which enables a share for a specified
753 zfs_sa_enable_share(sa_share_t share
, char *proto
)
755 if (_sa_enable_share
!= NULL
)
756 return (_sa_enable_share(share
, proto
));
757 return (SA_CONFIG_ERR
);
761 * zfs_sa_disable_share(share, proto)
763 * Wrapper for sa_enable_share which disables a share for a specified
767 zfs_sa_disable_share(sa_share_t share
, char *proto
)
769 if (_sa_disable_share
!= NULL
)
770 return (_sa_disable_share(share
, proto
));
771 return (SA_CONFIG_ERR
);
775 * Share the given filesystem according to the options in the specified
776 * protocol specific properties (sharenfs, sharesmb). We rely
777 * on "libshare" to the dirty work for us.
780 zfs_share_proto(zfs_handle_t
*zhp
, zfs_share_proto_t
*proto
)
782 char mountpoint
[ZFS_MAXPROPLEN
];
783 char shareopts
[ZFS_MAXPROPLEN
];
784 char sourcestr
[ZFS_MAXPROPLEN
];
785 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
787 zfs_share_proto_t
*curr_proto
;
788 zprop_source_t sourcetype
;
791 if (!zfs_is_mountable(zhp
, mountpoint
, sizeof (mountpoint
), NULL
))
794 if ((ret
= zfs_init_libshare(hdl
, SA_INIT_SHARE_API
)) != SA_OK
) {
796 (void) zfs_error_fmt(hdl
, EZFS_SHARENFSFAILED
,
797 dgettext(TEXT_DOMAIN
, "cannot share '%s': %s"),
798 zfs_get_name(zhp
), _sa_errorstr
!= NULL
?
799 _sa_errorstr(ret
) : "");
801 #endif /* HAVE_SHARE */
805 for (curr_proto
= proto
; *curr_proto
!= PROTO_END
; curr_proto
++) {
807 * Return success if there are no share options.
809 if (zfs_prop_get(zhp
, proto_table
[*curr_proto
].p_prop
,
810 shareopts
, sizeof (shareopts
), &sourcetype
, sourcestr
,
811 ZFS_MAXPROPLEN
, B_FALSE
) != 0 ||
812 strcmp(shareopts
, "off") == 0)
816 * If the 'zoned' property is set, then zfs_is_mountable()
817 * will have already bailed out if we are in the global zone.
818 * But local zones cannot be NFS servers, so we ignore it for
819 * local zones as well.
821 if (zfs_prop_get_int(zhp
, ZFS_PROP_ZONED
))
824 share
= zfs_sa_find_share(hdl
->libzfs_sharehdl
, mountpoint
);
827 * This may be a new file system that was just
828 * created so isn't in the internal cache
829 * (second time through). Rather than
830 * reloading the entire configuration, we can
831 * assume ZFS has done the checking and it is
832 * safe to add this to the internal
835 if (_sa_zfs_process_share(hdl
->libzfs_sharehdl
,
836 NULL
, NULL
, mountpoint
,
837 proto_table
[*curr_proto
].p_name
, sourcetype
,
838 shareopts
, sourcestr
, zhp
->zfs_name
) != SA_OK
) {
839 (void) zfs_error_fmt(hdl
,
840 proto_table
[*curr_proto
].p_share_err
,
841 dgettext(TEXT_DOMAIN
, "cannot share '%s'"),
845 hdl
->libzfs_shareflags
|= ZFSSHARE_MISS
;
846 share
= zfs_sa_find_share(hdl
->libzfs_sharehdl
,
851 err
= zfs_sa_enable_share(share
,
852 proto_table
[*curr_proto
].p_name
);
854 (void) zfs_error_fmt(hdl
,
855 proto_table
[*curr_proto
].p_share_err
,
856 dgettext(TEXT_DOMAIN
, "cannot share '%s'"),
861 (void) zfs_error_fmt(hdl
,
862 proto_table
[*curr_proto
].p_share_err
,
863 dgettext(TEXT_DOMAIN
, "cannot share '%s'"),
874 zfs_share_nfs(zfs_handle_t
*zhp
)
876 return (zfs_share_proto(zhp
, nfs_only
));
880 zfs_share_smb(zfs_handle_t
*zhp
)
882 return (zfs_share_proto(zhp
, smb_only
));
886 zfs_shareall(zfs_handle_t
*zhp
)
888 return (zfs_share_proto(zhp
, share_all_proto
));
892 * Unshare a filesystem by mountpoint.
895 unshare_one(libzfs_handle_t
*hdl
, const char *name
, const char *mountpoint
,
896 zfs_share_proto_t proto
)
902 * Mountpoint could get trashed if libshare calls getmntany
903 * which it does during API initialization, so strdup the
906 mntpt
= zfs_strdup(hdl
, mountpoint
);
908 /* make sure libshare initialized */
909 if ((err
= zfs_init_libshare(hdl
, SA_INIT_SHARE_API
)) != SA_OK
) {
910 free(mntpt
); /* don't need the copy anymore */
911 return (zfs_error_fmt(hdl
, EZFS_SHARENFSFAILED
,
912 dgettext(TEXT_DOMAIN
, "cannot unshare '%s': %s"),
913 name
, _sa_errorstr(err
)));
916 share
= zfs_sa_find_share(hdl
->libzfs_sharehdl
, mntpt
);
917 free(mntpt
); /* don't need the copy anymore */
920 err
= zfs_sa_disable_share(share
, proto_table
[proto
].p_name
);
922 return (zfs_error_fmt(hdl
, EZFS_UNSHARENFSFAILED
,
923 dgettext(TEXT_DOMAIN
, "cannot unshare '%s': %s"),
924 name
, _sa_errorstr(err
)));
927 return (zfs_error_fmt(hdl
, EZFS_UNSHARENFSFAILED
,
928 dgettext(TEXT_DOMAIN
, "cannot unshare '%s': not found"),
935 * Unshare the given filesystem.
938 zfs_unshare_proto(zfs_handle_t
*zhp
, const char *mountpoint
,
939 zfs_share_proto_t
*proto
)
941 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
945 /* check to see if need to unmount the filesystem */
946 rewind(zhp
->zfs_hdl
->libzfs_mnttab
);
947 if (mountpoint
!= NULL
)
948 mountpoint
= mntpt
= zfs_strdup(hdl
, mountpoint
);
950 if (mountpoint
!= NULL
|| ((zfs_get_type(zhp
) == ZFS_TYPE_FILESYSTEM
) &&
951 libzfs_mnttab_find(hdl
, zfs_get_name(zhp
), &entry
) == 0)) {
952 zfs_share_proto_t
*curr_proto
;
954 if (mountpoint
== NULL
)
955 mntpt
= zfs_strdup(zhp
->zfs_hdl
, entry
.mnt_mountp
);
957 for (curr_proto
= proto
; *curr_proto
!= PROTO_END
;
960 if (is_shared(hdl
, mntpt
, *curr_proto
) &&
961 unshare_one(hdl
, zhp
->zfs_name
,
962 mntpt
, *curr_proto
) != 0) {
976 zfs_unshare_nfs(zfs_handle_t
*zhp
, const char *mountpoint
)
978 return (zfs_unshare_proto(zhp
, mountpoint
, nfs_only
));
982 zfs_unshare_smb(zfs_handle_t
*zhp
, const char *mountpoint
)
984 return (zfs_unshare_proto(zhp
, mountpoint
, smb_only
));
988 * Same as zfs_unmountall(), but for NFS and SMB unshares.
991 zfs_unshareall_proto(zfs_handle_t
*zhp
, zfs_share_proto_t
*proto
)
993 prop_changelist_t
*clp
;
996 clp
= changelist_gather(zhp
, ZFS_PROP_SHARENFS
, 0, 0);
1000 ret
= changelist_unshare(clp
, proto
);
1001 changelist_free(clp
);
1007 zfs_unshareall_nfs(zfs_handle_t
*zhp
)
1009 return (zfs_unshareall_proto(zhp
, nfs_only
));
1013 zfs_unshareall_smb(zfs_handle_t
*zhp
)
1015 return (zfs_unshareall_proto(zhp
, smb_only
));
1019 zfs_unshareall(zfs_handle_t
*zhp
)
1021 return (zfs_unshareall_proto(zhp
, share_all_proto
));
1025 zfs_unshareall_bypath(zfs_handle_t
*zhp
, const char *mountpoint
)
1027 return (zfs_unshare_proto(zhp
, mountpoint
, share_all_proto
));
1031 * Remove the mountpoint associated with the current dataset, if necessary.
1032 * We only remove the underlying directory if:
1034 * - The mountpoint is not 'none' or 'legacy'
1035 * - The mountpoint is non-empty
1036 * - The mountpoint is the default or inherited
1037 * - The 'zoned' property is set, or we're in a local zone
1039 * Any other directories we leave alone.
1042 remove_mountpoint(zfs_handle_t
*zhp
)
1044 char mountpoint
[ZFS_MAXPROPLEN
];
1045 zprop_source_t source
;
1047 if (!zfs_is_mountable(zhp
, mountpoint
, sizeof (mountpoint
),
1051 if (source
== ZPROP_SRC_DEFAULT
||
1052 source
== ZPROP_SRC_INHERITED
) {
1054 * Try to remove the directory, silently ignoring any errors.
1055 * The filesystem may have since been removed or moved around,
1056 * and this error isn't really useful to the administrator in
1059 (void) rmdir(mountpoint
);
1064 libzfs_add_handle(get_all_cb_t
*cbp
, zfs_handle_t
*zhp
)
1066 if (cbp
->cb_alloc
== cbp
->cb_used
) {
1070 newsz
= cbp
->cb_alloc
? cbp
->cb_alloc
* 2 : 64;
1071 ptr
= zfs_realloc(zhp
->zfs_hdl
,
1072 cbp
->cb_handles
, cbp
->cb_alloc
* sizeof (void *),
1073 newsz
* sizeof (void *));
1074 cbp
->cb_handles
= ptr
;
1075 cbp
->cb_alloc
= newsz
;
1077 cbp
->cb_handles
[cbp
->cb_used
++] = zhp
;
1081 mount_cb(zfs_handle_t
*zhp
, void *data
)
1083 get_all_cb_t
*cbp
= data
;
1085 if (!(zfs_get_type(zhp
) & ZFS_TYPE_FILESYSTEM
)) {
1090 if (zfs_prop_get_int(zhp
, ZFS_PROP_CANMOUNT
) == ZFS_CANMOUNT_NOAUTO
) {
1095 libzfs_add_handle(cbp
, zhp
);
1096 if (zfs_iter_filesystems(zhp
, mount_cb
, cbp
) != 0) {
1104 libzfs_dataset_cmp(const void *a
, const void *b
)
1106 zfs_handle_t
**za
= (zfs_handle_t
**)a
;
1107 zfs_handle_t
**zb
= (zfs_handle_t
**)b
;
1108 char mounta
[MAXPATHLEN
];
1109 char mountb
[MAXPATHLEN
];
1110 boolean_t gota
, gotb
;
1112 if ((gota
= (zfs_get_type(*za
) == ZFS_TYPE_FILESYSTEM
)) != 0)
1113 verify(zfs_prop_get(*za
, ZFS_PROP_MOUNTPOINT
, mounta
,
1114 sizeof (mounta
), NULL
, NULL
, 0, B_FALSE
) == 0);
1115 if ((gotb
= (zfs_get_type(*zb
) == ZFS_TYPE_FILESYSTEM
)) != 0)
1116 verify(zfs_prop_get(*zb
, ZFS_PROP_MOUNTPOINT
, mountb
,
1117 sizeof (mountb
), NULL
, NULL
, 0, B_FALSE
) == 0);
1120 return (strcmp(mounta
, mountb
));
1127 return (strcmp(zfs_get_name(a
), zfs_get_name(b
)));
1131 * Mount and share all datasets within the given pool. This assumes that no
1132 * datasets within the pool are currently mounted. Because users can create
1133 * complicated nested hierarchies of mountpoints, we first gather all the
1134 * datasets and mountpoints within the pool, and sort them by mountpoint. Once
1135 * we have the list of all filesystems, we iterate over them in order and mount
1136 * and/or share each one.
1138 #pragma weak zpool_mount_datasets = zpool_enable_datasets
1140 zpool_enable_datasets(zpool_handle_t
*zhp
, const char *mntopts
, int flags
)
1142 get_all_cb_t cb
= { 0 };
1143 libzfs_handle_t
*hdl
= zhp
->zpool_hdl
;
1149 * Gather all non-snap datasets within the pool.
1151 if ((zfsp
= zfs_open(hdl
, zhp
->zpool_name
, ZFS_TYPE_DATASET
)) == NULL
)
1154 libzfs_add_handle(&cb
, zfsp
);
1155 if (zfs_iter_filesystems(zfsp
, mount_cb
, &cb
) != 0)
1158 * Sort the datasets by mountpoint.
1160 qsort(cb
.cb_handles
, cb
.cb_used
, sizeof (void *),
1161 libzfs_dataset_cmp
);
1164 * And mount all the datasets, keeping track of which ones
1165 * succeeded or failed.
1167 if ((good
= zfs_alloc(zhp
->zpool_hdl
,
1168 cb
.cb_used
* sizeof (int))) == NULL
)
1172 for (i
= 0; i
< cb
.cb_used
; i
++) {
1173 if (zfs_mount(cb
.cb_handles
[i
], mntopts
, flags
) != 0)
1180 * Then share all the ones that need to be shared. This needs
1181 * to be a separate pass in order to avoid excessive reloading
1182 * of the configuration. Good should never be NULL since
1183 * zfs_alloc is supposed to exit if memory isn't available.
1185 for (i
= 0; i
< cb
.cb_used
; i
++) {
1186 if (good
[i
] && zfs_share(cb
.cb_handles
[i
]) != 0)
1193 for (i
= 0; i
< cb
.cb_used
; i
++)
1194 zfs_close(cb
.cb_handles
[i
]);
1195 free(cb
.cb_handles
);
1201 mountpoint_compare(const void *a
, const void *b
)
1203 const char *mounta
= *((char **)a
);
1204 const char *mountb
= *((char **)b
);
1206 return (strcmp(mountb
, mounta
));
1209 /* alias for 2002/240 */
1210 #pragma weak zpool_unmount_datasets = zpool_disable_datasets
1212 * Unshare and unmount all datasets within the given pool. We don't want to
1213 * rely on traversing the DSL to discover the filesystems within the pool,
1214 * because this may be expensive (if not all of them are mounted), and can fail
1215 * arbitrarily (on I/O error, for example). Instead, we walk /etc/mtab and
1216 * gather all the filesystems that are currently mounted.
1219 zpool_disable_datasets(zpool_handle_t
*zhp
, boolean_t force
)
1222 struct mnttab entry
;
1224 char **mountpoints
= NULL
;
1225 zfs_handle_t
**datasets
= NULL
;
1226 libzfs_handle_t
*hdl
= zhp
->zpool_hdl
;
1229 int flags
= (force
? MS_FORCE
: 0);
1231 namelen
= strlen(zhp
->zpool_name
);
1233 rewind(hdl
->libzfs_mnttab
);
1235 while (getmntent(hdl
->libzfs_mnttab
, &entry
) == 0) {
1237 * Ignore non-ZFS entries.
1239 if (entry
.mnt_fstype
== NULL
||
1240 strcmp(entry
.mnt_fstype
, MNTTYPE_ZFS
) != 0)
1244 * Ignore filesystems not within this pool.
1246 if (entry
.mnt_mountp
== NULL
||
1247 strncmp(entry
.mnt_special
, zhp
->zpool_name
, namelen
) != 0 ||
1248 (entry
.mnt_special
[namelen
] != '/' &&
1249 entry
.mnt_special
[namelen
] != '\0'))
1253 * At this point we've found a filesystem within our pool. Add
1254 * it to our growing list.
1256 if (used
== alloc
) {
1258 if ((mountpoints
= zfs_alloc(hdl
,
1259 8 * sizeof (void *))) == NULL
)
1262 if ((datasets
= zfs_alloc(hdl
,
1263 8 * sizeof (void *))) == NULL
)
1270 if ((ptr
= zfs_realloc(hdl
, mountpoints
,
1271 alloc
* sizeof (void *),
1272 alloc
* 2 * sizeof (void *))) == NULL
)
1276 if ((ptr
= zfs_realloc(hdl
, datasets
,
1277 alloc
* sizeof (void *),
1278 alloc
* 2 * sizeof (void *))) == NULL
)
1286 if ((mountpoints
[used
] = zfs_strdup(hdl
,
1287 entry
.mnt_mountp
)) == NULL
)
1291 * This is allowed to fail, in case there is some I/O error. It
1292 * is only used to determine if we need to remove the underlying
1293 * mountpoint, so failure is not fatal.
1295 datasets
[used
] = make_dataset_handle(hdl
, entry
.mnt_special
);
1301 * At this point, we have the entire list of filesystems, so sort it by
1304 qsort(mountpoints
, used
, sizeof (char *), mountpoint_compare
);
1307 * Walk through and first unshare everything.
1309 for (i
= 0; i
< used
; i
++) {
1310 zfs_share_proto_t
*curr_proto
;
1311 for (curr_proto
= share_all_proto
; *curr_proto
!= PROTO_END
;
1313 if (is_shared(hdl
, mountpoints
[i
], *curr_proto
) &&
1314 unshare_one(hdl
, mountpoints
[i
],
1315 mountpoints
[i
], *curr_proto
) != 0)
1321 * Now unmount everything, removing the underlying directories as
1324 for (i
= 0; i
< used
; i
++) {
1325 if (unmount_one(hdl
, mountpoints
[i
], flags
) != 0)
1329 for (i
= 0; i
< used
; i
++) {
1331 remove_mountpoint(datasets
[i
]);
1336 for (i
= 0; i
< used
; i
++) {
1338 zfs_close(datasets
[i
]);
1339 free(mountpoints
[i
]);