fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER START
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The contents of this file are subject to the terms of the
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock * Common Development and Distribution License (the "License").
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock * You may not use this file except in compliance with the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
fa9e4066f08beec538e775443c5be79dd423fcabahrens * See the License for the specific language governing permissions
fa9e4066f08beec538e775443c5be79dd423fcabahrens * and limitations under the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * When distributing Covered Code, include this CDDL HEADER in each
fa9e4066f08beec538e775443c5be79dd423fcabahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If applicable, add the following below this CDDL HEADER, with the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * fields enclosed by brackets "[]" replaced with your own identifying
fa9e4066f08beec538e775443c5be79dd423fcabahrens * information: Portions Copyright [yyyy] [name of copyright owner]
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER END
d1672efb6feac57c42788e27f739dfa3c4f3baf7Marcel Telka * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
dc7cd546d81fce970935f08099931c2ad2d57731Mark Shellenbaum * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson * Copyright (c) 2014, 2016 by Delphix. All rights reserved.
88f61dee20b358671b1b643e9d1dbf220a1d69beIgor Kozhukhov * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Routines to manage ZFS mounts. We separate all the nasty routines that have
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * to deal with the OS. The following functions are the main entry points --
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * they are used by mount and unmount and when changing a filesystem's
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * mountpoint.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_is_mounted()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_mount()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_unmount()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_unmountall()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * This file also contains the functions used to manage sharing filesystems via
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * NFS and iSCSI:
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_is_shared()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_share()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_unshare()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zfs_is_shared_nfs()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_is_shared_smb()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_share_proto()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_shareall();
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_unshare_nfs()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_unshare_smb()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_unshareall_nfs()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_unshareall_smb()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_unshareall()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zfs_unshareall_bypath()
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * The following functions are available for pool consumers, and will
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * mount/unmount and share/unshare all datasets within pool:
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zpool_enable_datasets()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zpool_disable_datasets()
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#define MAXISALEN 257 /* based on sysinfo(2) man page */
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwstatic int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * The share protocols table must be in the same order as the zfs_share_prot_t
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwtypedef struct {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED},
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED},
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * Search the sharetab for the given mountpoint and protocol, returning
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * a zfs_share_type_t value.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwis_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto)
99653d4ee642c6528e88224f12409a5f23060994eschrock while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* the mountpoint is the first entry on each line */
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * the protocol field is the third field
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * skip over second field
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw switch (proto) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (0);
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * We only want to return false if the given path is a non empty
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * directory, all other errors are handled elsewhere.
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya if (stat(dirname, &st) < 0 || !S_ISDIR(st.st_mode)) {
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * An empty directory will still have two entries in it, one
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * entry for each of "." and "..".
d420209d9c807f782c1d31f5683be74798142198Alex Reece O_RDONLY | O_NDELAY | O_LARGEFILE | O_CLOEXEC, 0)) < 0) {
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * Returns true if the specified directory is empty. If we can't open the
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * directory at all, return true so that the mount can fail with a more
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * informative error message.
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * If the statvfs call fails or the filesystem is not a ZFS
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * filesystem, fall back to the slow path which uses readdir.
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * At this point, we know the provided path is on a ZFS
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * filesystem, so we can use stat instead of readdir to
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * determine if the directory is empty or not. We try to avoid
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * using readdir because that requires opening "dirname"; this
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * open file descriptor can potentially end up in a child
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * process if there's a concurrent fork, thus preventing the
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * zfs_mount() from otherwise succeeding (the open file
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * descriptor inherited by the child process will cause the
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * parent's mount to fail with EBUSY). The performance
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * implications of replacing the open, read, and close with a
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * single stat is nice; but is not the main motivation for the
873c4903a52d089cd8234b79d24f5a3fc3bccc82Prakash Surya * added complexity.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Checks to see if the mount is active. If the filesystem is mounted, we fill
fa9e4066f08beec538e775443c5be79dd423fcabahrens * in 'where' with the current mountpoint, and return 1. Otherwise, we return
55434c770c89aa1b84474f2559a106803511aba0ekis_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where)
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0)
55434c770c89aa1b84474f2559a106803511aba0ek return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where));
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * Returns true if the given dataset is mountable, false otherwise. Returns the
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * mountpoint in 'buf'.
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrockzfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen,
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type))
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen,
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0);
a227b7f4f323ad89c40a86c430a5e891504a8e8bhs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF)
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Mount the given filesystem.
fa9e4066f08beec538e775443c5be79dd423fcabahrenszfs_mount(zfs_handle_t *zhp, const char *options, int flags)
f9af39bacaaa0f9dda3b75ff6858b9f3988a39afGeorge Wilson * If the pool is imported read-only then all mounts must be read-only
f9af39bacaaa0f9dda3b75ff6858b9f3988a39afGeorge Wilson if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL))
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
99653d4ee642c6528e88224f12409a5f23060994eschrock return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* Create the directory if it doesn't already exist */
99653d4ee642c6528e88224f12409a5f23060994eschrock "failed to create mountpoint"));
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Determine if the mountpoint is empty. If so, refuse to perform the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * mount. We don't perform this check if MS_OVERLAY is specified, which
fa9e4066f08beec538e775443c5be79dd423fcabahrens * would defeat the point. We also avoid this check if 'remount' is
fa9e4066f08beec538e775443c5be79dd423fcabahrens * specified.
99653d4ee642c6528e88224f12409a5f23060994eschrock "directory is not empty"));
99653d4ee642c6528e88224f12409a5f23060994eschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint));
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* perform the mount */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags,
fa9e4066f08beec538e775443c5be79dd423fcabahrens MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Generic errors are nasty, but there are just way too many
fa9e4066f08beec538e775443c5be79dd423fcabahrens * from mount(), and they're well-understood. We pick a few
fa9e4066f08beec538e775443c5be79dd423fcabahrens * common ones to improve upon.
99653d4ee642c6528e88224f12409a5f23060994eschrock "mountpoint or dataset is busy"));
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks "Insufficient privileges"));
dc7cd546d81fce970935f08099931c2ad2d57731Mark Shellenbaum VERIFY(zfs_spa_version(zhp, &spa_version) == 0);
dc7cd546d81fce970935f08099931c2ad2d57731Mark Shellenbaum dgettext(TEXT_DOMAIN, "Can't mount a version %lld "
dc7cd546d81fce970935f08099931c2ad2d57731Mark Shellenbaum "file system on a version %d pool. Pool must be"
dc7cd546d81fce970935f08099931c2ad2d57731Mark Shellenbaum " upgraded to mount this file system."),
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor /* add the mounted entry into our cache */
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint,
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Unmount a single filesystem.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockunmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Unmount the given filesystem.
fa9e4066f08beec538e775443c5be79dd423fcabahrenszfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags)
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor /* check to see if we need to unmount the filesystem */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) {
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * mountpoint may have come from a call to
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * getmnt/getmntany if it isn't NULL. If it is NULL,
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor * we know it comes from libzfs_mnttab_find which can
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor * then get freed later. We strdup it to play it safe.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Unshare and unmount the filesystem
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0)
eb66cf861f74a9a3d0549a7c2a30df192f00e668th return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Unmount this filesystem and any children inheriting the mountpoint property.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * To do this, just act like we're changing the mountpoint property, but don't
fa9e4066f08beec538e775443c5be79dd423fcabahrens * remount the filesystems afterwards.
0069fd67511146f5f43175204d5b71d2b357be71Tim Haley clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Check to see if the filesystem is currently shared.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto)
88f61dee20b358671b1b643e9d1dbf220a1d69beIgor Kozhukhov if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto))
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Make sure things will work if libshare isn't installed by using
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * wrapper functions that check to see that the pointers to functions
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * initialized in _zfs_init_libshare() are actually present.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic sa_share_t (*_sa_find_share)(sa_handle_t, char *);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic int (*_sa_parse_legacy_options)(sa_group_t, char *, char *);
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougmstatic libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t);
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougmstatic int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t,
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm char *, char *, zprop_source_t, char *, char *, char *);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * _zfs_init_libshare()
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Find the libshare.so.1 entry points that we use here and save the
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * values to be used later. This is triggered by the runtime loader.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Make sure the correct ISA version is loaded.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#if defined(_LP64)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) {
d8689a57b109f75e2654627f1847266e18f5a7f2dougm _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init");
d8689a57b109f75e2654627f1847266e18f5a7f2dougm _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini");
d8689a57b109f75e2654627f1847266e18f5a7f2dougm _sa_find_share = (sa_share_t (*)(sa_handle_t, char *))
d8689a57b109f75e2654627f1847266e18f5a7f2dougm _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm "sa_enable_share");
d8689a57b109f75e2654627f1847266e18f5a7f2dougm _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm "sa_disable_share");
d8689a57b109f75e2654627f1847266e18f5a7f2dougm _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr");
d8689a57b109f75e2654627f1847266e18f5a7f2dougm _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *))
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t))
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t,
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm char *, char *))dlsym(libshare, "sa_zfs_process_share");
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL ||
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_init_libshare(zhandle, service)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Initialize the libshare API if it hasn't already been initialized.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * In all cases it returns 0 if it succeeded and an error if not. The
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * service value is which part(s) of the API to initialize and is a
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * direct map to the libshare sa_init(service) interface.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmzfs_init_libshare(libzfs_handle_t *zhandle, int service)
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson * Attempt to refresh libshare. This is necessary if there was a cache
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson * miss for a new ZFS dataset that was just created, or if state of the
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson * sharetab file has changed since libshare was last initialized. We
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson * want to make sure so check timestamps to see if a different process
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson * has updated any of the configuration. If there was some non-ZFS
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson * change, we need to re-initialize the internal cache.
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson _sa_needs_refresh(zhandle->libzfs_sharehdl)) {
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson zhandle->libzfs_sharehdl = _sa_init(service);
09c9e6dc9b69d10b771bb87e01040ec320a0bfd3Chris Williamson if (zhandle && zhandle->libzfs_sharehdl == NULL)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_uninit_libshare(zhandle)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Uninitialize the libshare API if it hasn't already been
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * uninitialized. It is OK to call multiple times.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) {
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_parse_options(options, proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Call the legacy parse interface to get the protocol specific
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * options using the NULL arg to indicate that this is a "parse" only.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_parse_options(char *options, zfs_share_proto_t proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_sa_find_share(handle, path)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * wrapper around sa_find_share to find a share path in the
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * configuration.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_sa_enable_share(share, proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Wrapper for sa_enable_share which enables a share for a specified
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * protocol.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_sa_disable_share(share, proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Wrapper for sa_enable_share which disables a share for a specified
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * protocol.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * Share the given filesystem according to the options in the specified
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * protocol specific properties (sharenfs, sharesmb). We rely
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * on "libshare" to the dirty work for us.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * Return success if there are no share options.
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm shareopts, sizeof (shareopts), &sourcetype, sourcestr,
33cde0d0c27645bc9ec94c4d2955193c3dd4027cMatthew Ahrens ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API);
33cde0d0c27645bc9ec94c4d2955193c3dd4027cMatthew Ahrens (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
33cde0d0c27645bc9ec94c4d2955193c3dd4027cMatthew Ahrens dgettext(TEXT_DOMAIN, "cannot share '%s': %s"),
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * If the 'zoned' property is set, then zfs_is_mountable()
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * will have already bailed out if we are in the global zone.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * But local zones cannot be NFS servers, so we ignore it for
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * local zones as well.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint);
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm * This may be a new file system that was just
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm * created so isn't in the internal cache
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm * (second time through). Rather than
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm * reloading the entire configuration, we can
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm * assume ZFS has done the checking and it is
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm * safe to add this to the internal
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm * configuration.
5b6e0c463149a26dd0aeb4c1f70611c97161ff32dougm return (-1);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (-1);
d8689a57b109f75e2654627f1847266e18f5a7f2dougm return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Unshare a filesystem by mountpoint.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwunshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint,
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Mountpoint could get trashed if libshare calls getmntany
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor * which it does during API initialization, so strdup the
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm /* make sure libshare initialized */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) {
d1672efb6feac57c42788e27f739dfa3c4f3baf7Marcel Telka return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw err = zfs_sa_disable_share(share, proto_table[proto].p_name);
d8689a57b109f75e2654627f1847266e18f5a7f2dougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"),
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Unshare the given filesystem.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint,
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* check to see if need to unmount the filesystem */
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor mountpoint = mntpt = zfs_strdup(hdl, mountpoint);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
ebedde844eddf46049b2403f974b50bcba47356eEric Taylor libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * Same as zfs_unmountall(), but for NFS and SMB unshares.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
0069fd67511146f5f43175204d5b71d2b357be71Tim Haley clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (zfs_unshare_proto(zhp, mountpoint, share_all_proto));
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Remove the mountpoint associated with the current dataset, if necessary.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * We only remove the underlying directory if:
fa9e4066f08beec538e775443c5be79dd423fcabahrens * - The mountpoint is not 'none' or 'legacy'
fa9e4066f08beec538e775443c5be79dd423fcabahrens * - The mountpoint is non-empty
fa9e4066f08beec538e775443c5be79dd423fcabahrens * - The mountpoint is the default or inherited
fa9e4066f08beec538e775443c5be79dd423fcabahrens * - The 'zoned' property is set, or we're in a local zone
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Any other directories we leave alone.
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint),
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Try to remove the directory, silently ignoring any errors.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The filesystem may have since been removed or moved around,
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * and this error isn't really useful to the administrator in
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylorlibzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp)
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylor cbp->cb_handles, cbp->cb_alloc * sizeof (void *),
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylor newsz * sizeof (void *));
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylor if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (0);
a227b7f4f323ad89c40a86c430a5e891504a8e8bhs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) {
a227b7f4f323ad89c40a86c430a5e891504a8e8bhs return (0);
9c3fd1216fa7fb02cfbc78a2518a686d54b48ab8Matthew Ahrens * If this filesystem is inconsistent and has a receive resume
9c3fd1216fa7fb02cfbc78a2518a686d54b48ab8Matthew Ahrens * token, we can not mount it.
9c3fd1216fa7fb02cfbc78a2518a686d54b48ab8Matthew Ahrens if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) &&
9c3fd1216fa7fb02cfbc78a2518a686d54b48ab8Matthew Ahrens zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN,
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylor if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) {
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylor return (-1);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (-1);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (1);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * Mount and share all datasets within the given pool. This assumes that no
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * datasets within the pool are currently mounted. Because users can create
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * complicated nested hierarchies of mountpoints, we first gather all the
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * datasets and mountpoints within the pool, and sort them by mountpoint. Once
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * we have the list of all filesystems, we iterate over them in order and mount
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * and/or share each one.
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl#pragma weak zpool_mount_datasets = zpool_enable_datasets
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
d87468da622d0a816b26cc636aa7dcc08249300erm * Gather all non-snap datasets within the pool.
990b4856d0eaada6f8140335733a1b1771ed2746lling if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Sort the datasets by mountpoint.
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylor qsort(cb.cb_handles, cb.cb_used, sizeof (void *),
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * And mount all the datasets, keeping track of which ones
6e77af0a94cdc57c7be78bc6175d54fae6b3abafDavid Pacheco * succeeded or failed.
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylor if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Then share all the ones that need to be shared. This needs
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * to be a separate pass in order to avoid excessive reloading
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * of the configuration. Good should never be NULL since
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_alloc is supposed to exit if memory isn't available.
9d9a58e3638ed2e79c339c93e9c52b7150075364Eric Taylor if (good[i] && zfs_share(cb.cb_handles[i]) != 0)
681d9761e8516a7dc5ab6589e2dfe717777e1123Eric Taylor/* alias for 2002/240 */
681d9761e8516a7dc5ab6589e2dfe717777e1123Eric Taylor#pragma weak zpool_unmount_datasets = zpool_disable_datasets
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * Unshare and unmount all datasets within the given pool. We don't want to
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * rely on traversing the DSL to discover the filesystems within the pool,
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * because this may be expensive (if not all of them are mounted), and can fail
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * gather all the filesystems that are currently mounted.
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Ignore non-ZFS entries.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Ignore filesystems not within this pool.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 ||
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * At this point we've found a filesystem within our pool. Add
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * it to our growing list.
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock alloc * sizeof (void *),
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock alloc * sizeof (void *),
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * This is allowed to fail, in case there is some I/O error. It
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * is only used to determine if we need to remove the underlying
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * mountpoint, so failure is not fatal.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock datasets[used] = make_dataset_handle(hdl, entry.mnt_special);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * At this point, we have the entire list of filesystems, so sort it by
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * mountpoint.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock qsort(mountpoints, used, sizeof (char *), mountpoint_compare);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Walk through and first unshare everything.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock for (i = 0; i < used; i++) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw for (curr_proto = share_all_proto; *curr_proto != PROTO_END;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Now unmount everything, removing the underlying directories as
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * appropriate.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock for (i = 0; i < used; i++) {
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock for (i = 0; i < used; i++) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock for (i = 0; i < used; i++) {