libzfs_mount.c revision 57b448de658d89a2c88a001d58073c46ed2180f3
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER START
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
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 *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
fa9e4066f08beec538e775443c5be79dd423fcabahrens * or http://www.opensolaris.org/os/licensing.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * See the License for the specific language governing permissions
fa9e4066f08beec538e775443c5be79dd423fcabahrens * and limitations under the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
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 *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER END
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
11d2789dce8a2752df010d0679d3db12af1f510dgw * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Use is subject to license terms.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#pragma ident "%Z%%M% %I% %E% SMI"
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
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 *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_is_mounted()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_mount()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_unmount()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_unmountall()
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * This file also contains the functions used to manage sharing filesystems via
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * NFS and iSCSI:
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_is_shared()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_share()
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zfs_unshare()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl *
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zfs_is_shared_nfs()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zfs_share_nfs()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zfs_unshare_nfs()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zfs_unshareall_nfs()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zfs_is_shared_iscsi()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zfs_share_iscsi()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zfs_unshare_iscsi()
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock *
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * The following functions are available for pool consumers, and will
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * mount/unmount and share/unshare all datasets within pool:
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock *
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zpool_enable_datasets()
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * zpool_disable_datasets()
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <dirent.h>
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl#include <dlfcn.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <errno.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <libgen.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <libintl.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <stdio.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <stdlib.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <strings.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <unistd.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <zone.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/mntent.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/mnttab.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/mount.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/stat.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <libzfs.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include "libzfs_impl.h"
fa9e4066f08beec538e775443c5be79dd423fcabahrens
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#include <libshare.h>
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#include <sys/systeminfo.h>
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#define MAXISALEN 257 /* based on sysinfo(2) man page */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
d8d59944799a436698b0d88b5e6ae6d7d2422797ahlstatic int (*iscsitgt_zfs_share)(const char *);
d8d59944799a436698b0d88b5e6ae6d7d2422797ahlstatic int (*iscsitgt_zfs_unshare)(const char *);
d8d59944799a436698b0d88b5e6ae6d7d2422797ahlstatic int (*iscsitgt_zfs_is_shared)(const char *);
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl#pragma init(zfs_iscsi_init)
d8d59944799a436698b0d88b5e6ae6d7d2422797ahlstatic void
d8d59944799a436698b0d88b5e6ae6d7d2422797ahlzfs_iscsi_init(void)
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl{
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl void *libiscsitgt;
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl if ((libiscsitgt = dlopen("/lib/libiscsitgt.so.1",
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl RTLD_LAZY | RTLD_GLOBAL)) == NULL ||
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl (iscsitgt_zfs_share = (int (*)(const char *))dlsym(libiscsitgt,
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl "iscsitgt_zfs_share")) == NULL ||
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl (iscsitgt_zfs_unshare = (int (*)(const char *))dlsym(libiscsitgt,
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl "iscsitgt_zfs_unshare")) == NULL ||
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl (iscsitgt_zfs_is_shared = (int (*)(const char *))dlsym(libiscsitgt,
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl "iscsitgt_zfs_is_shared")) == NULL) {
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl iscsitgt_zfs_share = NULL;
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl iscsitgt_zfs_unshare = NULL;
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl iscsitgt_zfs_is_shared = NULL;
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl }
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl}
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
99653d4ee642c6528e88224f12409a5f23060994eschrock * Search the sharetab for the given mountpoint, returning true if it is found.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
99653d4ee642c6528e88224f12409a5f23060994eschrockstatic boolean_t
99653d4ee642c6528e88224f12409a5f23060994eschrockis_shared(libzfs_handle_t *hdl, const char *mountpoint)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens char buf[MAXPATHLEN], *tab;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
99653d4ee642c6528e88224f12409a5f23060994eschrock if (hdl->libzfs_sharetab == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
99653d4ee642c6528e88224f12409a5f23060994eschrock (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
99653d4ee642c6528e88224f12409a5f23060994eschrock while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* the mountpoint is the first entry on each line */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if ((tab = strchr(buf, '\t')) != NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens *tab = '\0';
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (strcmp(buf, mountpoint) == 0)
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_TRUE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_FALSE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
99653d4ee642c6528e88224f12409a5f23060994eschrock * Returns true if the specified directory is empty. If we can't open the
99653d4ee642c6528e88224f12409a5f23060994eschrock * directory at all, return true so that the mount can fail with a more
fa9e4066f08beec538e775443c5be79dd423fcabahrens * informative error message.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
99653d4ee642c6528e88224f12409a5f23060994eschrockstatic boolean_t
fa9e4066f08beec538e775443c5be79dd423fcabahrensdir_is_empty(const char *dirname)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens DIR *dirp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens struct dirent64 *dp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if ((dirp = opendir(dirname)) == NULL)
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_TRUE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens while ((dp = readdir64(dirp)) != NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (strcmp(dp->d_name, ".") == 0 ||
fa9e4066f08beec538e775443c5be79dd423fcabahrens strcmp(dp->d_name, "..") == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens continue;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) closedir(dirp);
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_FALSE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) closedir(dirp);
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_TRUE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
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
fa9e4066f08beec538e775443c5be79dd423fcabahrens * 0.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
99653d4ee642c6528e88224f12409a5f23060994eschrockboolean_t
55434c770c89aa1b84474f2559a106803511aba0ekis_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens struct mnttab search = { 0 }, entry;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Search for the entry in /etc/mnttab. We don't bother getting the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * mountpoint, as we can just search for the special device. This will
fa9e4066f08beec538e775443c5be79dd423fcabahrens * also let us find mounts when the mountpoint is 'legacy'.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
55434c770c89aa1b84474f2559a106803511aba0ek search.mnt_special = (char *)special;
96dedd18a4a04d13febde60137db5a12dc6350bdnd search.mnt_fstype = MNTTYPE_ZFS;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
55434c770c89aa1b84474f2559a106803511aba0ek rewind(zfs_hdl->libzfs_mnttab);
55434c770c89aa1b84474f2559a106803511aba0ek if (getmntany(zfs_hdl->libzfs_mnttab, &entry, &search) != 0)
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_FALSE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (where != NULL)
55434c770c89aa1b84474f2559a106803511aba0ek *where = zfs_strdup(zfs_hdl, entry.mnt_mountp);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_TRUE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
55434c770c89aa1b84474f2559a106803511aba0ekboolean_t
55434c770c89aa1b84474f2559a106803511aba0ekzfs_is_mounted(zfs_handle_t *zhp, char **where)
55434c770c89aa1b84474f2559a106803511aba0ek{
55434c770c89aa1b84474f2559a106803511aba0ek return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where));
55434c770c89aa1b84474f2559a106803511aba0ek}
55434c770c89aa1b84474f2559a106803511aba0ek
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock/*
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * Returns true if the given dataset is mountable, false otherwise. Returns the
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * mountpoint in 'buf'.
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock */
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrockstatic boolean_t
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrockzfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen,
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock zfs_source_t *source)
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock{
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock char sourceloc[ZFS_MAXNAMELEN];
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock zfs_source_t sourcetype;
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type))
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock return (B_FALSE);
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen,
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0);
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 ||
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0)
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock return (B_FALSE);
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT))
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock return (B_FALSE);
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) &&
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock getzoneid() == GLOBAL_ZONEID)
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock return (B_FALSE);
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (source)
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock *source = sourcetype;
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock return (B_TRUE);
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock}
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Mount the given filesystem.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszfs_mount(zfs_handle_t *zhp, const char *options, int flags)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens struct stat buf;
fa9e4066f08beec538e775443c5be79dd423fcabahrens char mountpoint[ZFS_MAXPROPLEN];
fa9e4066f08beec538e775443c5be79dd423fcabahrens char mntopts[MNT_LINE_MAX];
99653d4ee642c6528e88224f12409a5f23060994eschrock libzfs_handle_t *hdl = zhp->zfs_hdl;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (options == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens mntopts[0] = '\0';
fa9e4066f08beec538e775443c5be79dd423fcabahrens else
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) strlcpy(mntopts, options, sizeof (mntopts));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
99653d4ee642c6528e88224f12409a5f23060994eschrock return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* Create the directory if it doesn't already exist */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (lstat(mountpoint, &buf) != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mkdirp(mountpoint, 0755) != 0) {
99653d4ee642c6528e88224f12409a5f23060994eschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
99653d4ee642c6528e88224f12409a5f23060994eschrock "failed to create mountpoint"));
ece3d9b3bacef51a5f34d993935eedbb7bb87059lling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
99653d4ee642c6528e88224f12409a5f23060994eschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
99653d4ee642c6528e88224f12409a5f23060994eschrock mountpoint));
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
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.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if ((flags & MS_OVERLAY) == 0 &&
fa9e4066f08beec538e775443c5be79dd423fcabahrens strstr(mntopts, MNTOPT_REMOUNT) == NULL &&
fa9e4066f08beec538e775443c5be79dd423fcabahrens !dir_is_empty(mountpoint)) {
99653d4ee642c6528e88224f12409a5f23060994eschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
99653d4ee642c6528e88224f12409a5f23060994eschrock "directory is not empty"));
ece3d9b3bacef51a5f34d993935eedbb7bb87059lling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
99653d4ee642c6528e88224f12409a5f23060994eschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint));
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
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 /*
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.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
d8689a57b109f75e2654627f1847266e18f5a7f2dougm if (errno == EBUSY) {
99653d4ee642c6528e88224f12409a5f23060994eschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
99653d4ee642c6528e88224f12409a5f23060994eschrock "mountpoint or dataset is busy"));
d8689a57b109f75e2654627f1847266e18f5a7f2dougm } else {
99653d4ee642c6528e88224f12409a5f23060994eschrock zfs_error_aux(hdl, strerror(errno));
d8689a57b109f75e2654627f1847266e18f5a7f2dougm }
99653d4ee642c6528e88224f12409a5f23060994eschrock
ece3d9b3bacef51a5f34d993935eedbb7bb87059lling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED,
99653d4ee642c6528e88224f12409a5f23060994eschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"),
99653d4ee642c6528e88224f12409a5f23060994eschrock zhp->zfs_name));
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock/*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Unmount a single filesystem.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockstatic int
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockunmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock{
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (umount2(mountpoint, flags) != 0) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_error_aux(hdl, strerror(errno));
ece3d9b3bacef51a5f34d993935eedbb7bb87059lling return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED,
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock dgettext(TEXT_DOMAIN, "cannot unmount '%s'"),
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock mountpoint));
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (0);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock}
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Unmount the given filesystem.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens struct mnttab search = { 0 }, entry;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm char *mntpt = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* check to see if need to unmount the filesystem */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock search.mnt_special = zhp->zfs_name;
96dedd18a4a04d13febde60137db5a12dc6350bdnd search.mnt_fstype = MNTTYPE_ZFS;
99653d4ee642c6528e88224f12409a5f23060994eschrock rewind(zhp->zfs_hdl->libzfs_mnttab);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
99653d4ee642c6528e88224f12409a5f23060994eschrock getmntany(zhp->zfs_hdl->libzfs_mnttab, &entry, &search) == 0)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm /*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * mountpoint may have come from a call to
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * getmnt/getmntany if it isn't NULL. If it is NULL,
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * we know it comes from getmntany which can then get
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * overwritten later. We strdup it to play it safe.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mountpoint == NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm else
d8689a57b109f75e2654627f1847266e18f5a7f2dougm mntpt = zfs_strdup(zhp->zfs_hdl, mountpoint);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Unshare and unmount the filesystem
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (zfs_unshare_nfs(zhp, mntpt) != 0 ||
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm unmount_one(zhp->zfs_hdl, mntpt, flags) != 0) {
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm free(mntpt);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm free(mntpt);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
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.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszfs_unmountall(zfs_handle_t *zhp, int flags)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens prop_changelist_t *clp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int ret;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, flags);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (clp == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ret = changelist_prefix(clp);
fa9e4066f08beec538e775443c5be79dd423fcabahrens changelist_free(clp);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (ret);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlboolean_t
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_is_shared(zfs_handle_t *zhp)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl{
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (ZFS_IS_VOLUME(zhp))
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (zfs_is_shared_iscsi(zhp));
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (zfs_is_shared_nfs(zhp, NULL));
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl}
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_share(zfs_handle_t *zhp)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl{
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (ZFS_IS_VOLUME(zhp))
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (zfs_share_iscsi(zhp));
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (zfs_share_nfs(zhp));
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl}
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_unshare(zfs_handle_t *zhp)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl{
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (ZFS_IS_VOLUME(zhp))
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (zfs_unshare_iscsi(zhp));
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (zfs_unshare_nfs(zhp, NULL));
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl}
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Check to see if the filesystem is currently shared.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
99653d4ee642c6528e88224f12409a5f23060994eschrockboolean_t
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_is_shared_nfs(zfs_handle_t *zhp, char **where)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens char *mountpoint;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (!zfs_is_mounted(zhp, &mountpoint))
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_FALSE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
99653d4ee642c6528e88224f12409a5f23060994eschrock if (is_shared(zhp->zfs_hdl, mountpoint)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (where != NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens *where = mountpoint;
fa9e4066f08beec538e775443c5be79dd423fcabahrens else
fa9e4066f08beec538e775443c5be79dd423fcabahrens free(mountpoint);
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_TRUE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens free(mountpoint);
99653d4ee642c6528e88224f12409a5f23060994eschrock return (B_FALSE);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm/*
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.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic sa_handle_t (*_sa_init)(int);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic void (*_sa_fini)(sa_handle_t);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic sa_share_t (*_sa_find_share)(sa_handle_t, char *);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic int (*_sa_enable_share)(sa_share_t, char *);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic int (*_sa_disable_share)(sa_share_t, char *);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic char *(*_sa_errorstr)(int);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic int (*_sa_parse_legacy_options)(sa_group_t, char *, char *);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm/*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * _zfs_init_libshare()
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm *
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 */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#pragma init(_zfs_init_libshare)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic void
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm_zfs_init_libshare(void)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm{
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm void *libshare;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm char path[MAXPATHLEN];
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm char isa[MAXISALEN];
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#if defined(_LP64)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm isa[0] = '\0';
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#else
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm isa[0] = '\0';
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm#endif
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm (void) snprintf(path, MAXPATHLEN,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm "/usr/lib/%s/libshare.so.1", isa);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
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 dlsym(libshare, "sa_find_share");
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 *))
d8689a57b109f75e2654627f1847266e18f5a7f2dougm dlsym(libshare, "sa_parse_legacy_options");
57b448de658d89a2c88a001d58073c46ed2180f3dougm if (_sa_init == NULL || _sa_fini == NULL ||
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_find_share == NULL || _sa_enable_share == NULL ||
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_disable_share == NULL || _sa_errorstr == NULL ||
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_parse_legacy_options == NULL) {
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_init = NULL;
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_fini = NULL;
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_disable_share = NULL;
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_enable_share = NULL;
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_errorstr = NULL;
57b448de658d89a2c88a001d58073c46ed2180f3dougm _sa_parse_legacy_options = NULL;
57b448de658d89a2c88a001d58073c46ed2180f3dougm (void) dlclose(libshare);
57b448de658d89a2c88a001d58073c46ed2180f3dougm }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm}
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm/*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_init_libshare(zhandle, service)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm *
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.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmint
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmzfs_init_libshare(libzfs_handle_t *zhandle, int service)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm{
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm int ret = SA_OK;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
d8689a57b109f75e2654627f1847266e18f5a7f2dougm if (_sa_init == NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm ret = SA_CONFIG_ERR;
d8689a57b109f75e2654627f1847266e18f5a7f2dougm
d8689a57b109f75e2654627f1847266e18f5a7f2dougm if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm zhandle->libzfs_sharehdl = _sa_init(service);
d8689a57b109f75e2654627f1847266e18f5a7f2dougm
d8689a57b109f75e2654627f1847266e18f5a7f2dougm if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm ret = SA_NO_MEMORY;
d8689a57b109f75e2654627f1847266e18f5a7f2dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm return (ret);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm}
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm/*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_uninit_libshare(zhandle)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm *
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Uninitialize the libshare API if it hasn't already been
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * uninitialized. It is OK to call multiple times.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmvoid
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmzfs_uninit_libshare(libzfs_handle_t *zhandle)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm{
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) {
d8689a57b109f75e2654627f1847266e18f5a7f2dougm if (_sa_fini != NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm _sa_fini(zhandle->libzfs_sharehdl);
d8689a57b109f75e2654627f1847266e18f5a7f2dougm zhandle->libzfs_sharehdl = NULL;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm}
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm/*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_parse_options(options, proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm *
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.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmint
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmzfs_parse_options(char *options, char *proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm{
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm int ret;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (_sa_parse_legacy_options != NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm ret = _sa_parse_legacy_options(NULL, options, proto);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm else
d8689a57b109f75e2654627f1847266e18f5a7f2dougm ret = SA_CONFIG_ERR;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm return (ret);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm}
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm/*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_sa_find_share(handle, path)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm *
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * wrapper around sa_find_share to find a share path in the
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * configuration.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic sa_share_t
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmzfs_sa_find_share(sa_handle_t handle, char *path)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm{
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (_sa_find_share != NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm return (_sa_find_share(handle, path));
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm return (NULL);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm}
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm/*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_sa_enable_share(share, proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm *
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Wrapper for sa_enable_share which enables a share for a specified
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * protocol.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic int
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmzfs_sa_enable_share(sa_share_t share, char *proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm{
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (_sa_enable_share != NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm return (_sa_enable_share(share, proto));
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm return (SA_CONFIG_ERR);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm}
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm/*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * zfs_sa_disable_share(share, proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm *
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Wrapper for sa_enable_share which disables a share for a specified
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * protocol.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmstatic int
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougmzfs_sa_disable_share(sa_share_t share, char *proto)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm{
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (_sa_disable_share != NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm return (_sa_disable_share(share, proto));
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm return (SA_CONFIG_ERR);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm}
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Share the given filesystem according to the options in 'sharenfs'. We rely
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * on "libshare" to the dirty work for us.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_share_nfs(zfs_handle_t *zhp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens char mountpoint[ZFS_MAXPROPLEN];
fa9e4066f08beec538e775443c5be79dd423fcabahrens char shareopts[ZFS_MAXPROPLEN];
99653d4ee642c6528e88224f12409a5f23060994eschrock libzfs_handle_t *hdl = zhp->zfs_hdl;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm sa_share_t share;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm int ret;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL))
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl /*
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * Return success if there are no share options.
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts, sizeof (shareopts),
99653d4ee642c6528e88224f12409a5f23060994eschrock NULL, NULL, 0, B_FALSE) != 0 ||
fa9e4066f08beec538e775443c5be79dd423fcabahrens strcmp(shareopts, "off") == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * If the 'zoned' property is set, then zfs_is_mountable() will have
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * already bailed out if we are in the global zone. But local
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * zones cannot be NFS servers, so we ignore it for local zones as well.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED))
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) {
d8689a57b109f75e2654627f1847266e18f5a7f2dougm (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm dgettext(TEXT_DOMAIN, "cannot share '%s': %s"),
d8689a57b109f75e2654627f1847266e18f5a7f2dougm zfs_get_name(zhp), _sa_errorstr(ret));
d8689a57b109f75e2654627f1847266e18f5a7f2dougm return (-1);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (share != NULL) {
d8689a57b109f75e2654627f1847266e18f5a7f2dougm int err;
d8689a57b109f75e2654627f1847266e18f5a7f2dougm err = zfs_sa_enable_share(share, "nfs");
d8689a57b109f75e2654627f1847266e18f5a7f2dougm if (err != SA_OK) {
d8689a57b109f75e2654627f1847266e18f5a7f2dougm (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm dgettext(TEXT_DOMAIN, "cannot share '%s'"),
d8689a57b109f75e2654627f1847266e18f5a7f2dougm zfs_get_name(zhp));
d8689a57b109f75e2654627f1847266e18f5a7f2dougm return (-1);
d8689a57b109f75e2654627f1847266e18f5a7f2dougm }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm } else {
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm dgettext(TEXT_DOMAIN, "cannot share '%s'"),
d8689a57b109f75e2654627f1847266e18f5a7f2dougm zfs_get_name(zhp));
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock/*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Unshare a filesystem by mountpoint.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockstatic int
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockunshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock{
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm sa_share_t share;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm int err;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm char *mntpt;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * Mountpoint could get trashed if libshare calls getmntany
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * which id does during API initialization, so strdup the
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * value.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm mntpt = zfs_strdup(hdl, mountpoint);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm /* make sure libshare initialized */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) {
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm free(mntpt); /* don't need the copy anymore */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"),
d8689a57b109f75e2654627f1847266e18f5a7f2dougm name, _sa_errorstr(err)));
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm free(mntpt); /* don't need the copy anymore */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (share != NULL) {
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm err = zfs_sa_disable_share(share, "nfs");
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (err != SA_OK) {
d8689a57b109f75e2654627f1847266e18f5a7f2dougm return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"),
d8689a57b109f75e2654627f1847266e18f5a7f2dougm name, _sa_errorstr(err)));
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm } else {
ece3d9b3bacef51a5f34d993935eedbb7bb87059lling return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED,
d8689a57b109f75e2654627f1847266e18f5a7f2dougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"),
d8689a57b109f75e2654627f1847266e18f5a7f2dougm name));
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (0);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock}
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Unshare the given filesystem.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens struct mnttab search = { 0 }, entry;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm char *mntpt = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* check to see if need to unmount the filesystem */
fa9e4066f08beec538e775443c5be79dd423fcabahrens search.mnt_special = (char *)zfs_get_name(zhp);
96dedd18a4a04d13febde60137db5a12dc6350bdnd search.mnt_fstype = MNTTYPE_ZFS;
99653d4ee642c6528e88224f12409a5f23060994eschrock rewind(zhp->zfs_hdl->libzfs_mnttab);
d8689a57b109f75e2654627f1847266e18f5a7f2dougm if (mountpoint != NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm mountpoint = mntpt = zfs_strdup(zhp->zfs_hdl, mountpoint);
d8689a57b109f75e2654627f1847266e18f5a7f2dougm
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) &&
99653d4ee642c6528e88224f12409a5f23060994eschrock getmntany(zhp->zfs_hdl->libzfs_mnttab, &entry, &search) == 0)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mountpoint == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens mountpoint = entry.mnt_mountp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (is_shared(zhp->zfs_hdl, mountpoint) &&
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm unshare_one(zhp->zfs_hdl, zhp->zfs_name, mountpoint) != 0) {
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (mntpt != NULL)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm free(mntpt);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (-1);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (mntpt != NULL)
d8689a57b109f75e2654627f1847266e18f5a7f2dougm free(mntpt);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * Same as zfs_unmountall(), but for NFS unshares.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_unshareall_nfs(zfs_handle_t *zhp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens prop_changelist_t *clp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int ret;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (clp == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ret = changelist_unshare(clp);
fa9e4066f08beec538e775443c5be79dd423fcabahrens changelist_free(clp);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (ret);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Remove the mountpoint associated with the current dataset, if necessary.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * We only remove the underlying directory if:
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
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 *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Any other directories we leave alone.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensremove_mountpoint(zfs_handle_t *zhp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens char mountpoint[ZFS_MAXPROPLEN];
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock zfs_source_t source;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint),
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock &source))
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if (source == ZFS_SRC_DEFAULT ||
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock source == ZFS_SRC_INHERITED) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
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
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock * any way.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) rmdir(mountpoint);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlboolean_t
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_is_shared_iscsi(zfs_handle_t *zhp)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl{
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl return (iscsitgt_zfs_is_shared != NULL &&
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl iscsitgt_zfs_is_shared(zhp->zfs_name) != 0);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl}
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_share_iscsi(zfs_handle_t *zhp)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl{
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl char shareopts[ZFS_MAXPROPLEN];
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl const char *dataset = zhp->zfs_name;
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl libzfs_handle_t *hdl = zhp->zfs_hdl;
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl /*
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * Return success if there are no share options.
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl */
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts,
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl sizeof (shareopts), NULL, NULL, 0, B_FALSE) != 0 ||
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl strcmp(shareopts, "off") == 0)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (0);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl if (iscsitgt_zfs_share == NULL || iscsitgt_zfs_share(dataset) != 0)
ece3d9b3bacef51a5f34d993935eedbb7bb87059lling return (zfs_error_fmt(hdl, EZFS_SHAREISCSIFAILED,
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl dgettext(TEXT_DOMAIN, "cannot share '%s'"), dataset));
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (0);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl}
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzfs_unshare_iscsi(zfs_handle_t *zhp)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl{
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl const char *dataset = zfs_get_name(zhp);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl libzfs_handle_t *hdl = zhp->zfs_hdl;
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
11d2789dce8a2752df010d0679d3db12af1f510dgw /*
11d2789dce8a2752df010d0679d3db12af1f510dgw * Return if the volume is not shared
11d2789dce8a2752df010d0679d3db12af1f510dgw */
11d2789dce8a2752df010d0679d3db12af1f510dgw if (!zfs_is_shared_iscsi(zhp))
11d2789dce8a2752df010d0679d3db12af1f510dgw return (0);
11d2789dce8a2752df010d0679d3db12af1f510dgw
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl /*
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * If this fails with ENODEV it indicates that zvol wasn't shared so
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * we should return success in that case.
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl */
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl if (iscsitgt_zfs_unshare == NULL ||
d8d59944799a436698b0d88b5e6ae6d7d2422797ahl (iscsitgt_zfs_unshare(dataset) != 0 && errno != ENODEV))
ece3d9b3bacef51a5f34d993935eedbb7bb87059lling return (zfs_error_fmt(hdl, EZFS_UNSHAREISCSIFAILED,
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl dgettext(TEXT_DOMAIN, "cannot unshare '%s'"), dataset));
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (0);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl}
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrocktypedef struct mount_cbdata {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_handle_t **cb_datasets;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock int cb_used;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock int cb_alloc;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock} mount_cbdata_t;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockstatic int
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockmount_cb(zfs_handle_t *zhp, void *data)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock{
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock mount_cbdata_t *cbp = data;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (!(zfs_get_type(zhp) & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_close(zhp);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (0);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (cbp->cb_alloc == cbp->cb_used) {
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock void *ptr;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if ((ptr = zfs_realloc(zhp->zfs_hdl,
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock cbp->cb_datasets, cbp->cb_alloc * sizeof (void *),
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock cbp->cb_alloc * 2 * sizeof (void *))) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (-1);
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock cbp->cb_datasets = ptr;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock cbp->cb_alloc *= 2;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock cbp->cb_datasets[cbp->cb_used++] = zhp;
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (zfs_iter_children(zhp, mount_cb, cbp));
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock}
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockstatic int
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahldataset_cmp(const void *a, const void *b)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock{
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_handle_t **za = (zfs_handle_t **)a;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_handle_t **zb = (zfs_handle_t **)b;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock char mounta[MAXPATHLEN];
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock char mountb[MAXPATHLEN];
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl boolean_t gota, gotb;
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (gota && gotb)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (strcmp(mounta, mountb));
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (gota)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (-1);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (gotb)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (1);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (strcmp(zfs_get_name(a), zfs_get_name(b)));
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock}
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl/*
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 */
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl#pragma weak zpool_mount_datasets = zpool_enable_datasets
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock{
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock mount_cbdata_t cb = { 0 };
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock libzfs_handle_t *hdl = zhp->zpool_hdl;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_handle_t *zfsp;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock int i, ret = -1;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm int *good;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Gather all datasets within the pool.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if ((cb.cb_datasets = zfs_alloc(hdl, 4 * sizeof (void *))) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (-1);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock cb.cb_alloc = 4;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_ANY)) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock cb.cb_datasets[0] = zfsp;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock cb.cb_used = 1;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (zfs_iter_children(zfsp, mount_cb, &cb) != 0)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Sort the datasets by mountpoint.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl qsort(cb.cb_datasets, cb.cb_used, sizeof (void *), dataset_cmp);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * And mount all the datasets, keeping track of which ones
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * succeeded or failed. By using zfs_alloc(), the good pointer
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm * will always be non-NULL.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm good = zfs_alloc(zhp->zpool_hdl, cb.cb_used * sizeof (int));
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock ret = 0;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock for (i = 0; i < cb.cb_used; i++) {
d8689a57b109f75e2654627f1847266e18f5a7f2dougm if (zfs_mount(cb.cb_datasets[i], mntopts, flags) != 0)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock ret = -1;
d8689a57b109f75e2654627f1847266e18f5a7f2dougm else
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm good[i] = 1;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm /*
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.
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm */
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm zfs_uninit_libshare(hdl);
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm for (i = 0; i < cb.cb_used; i++) {
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm if (good[i] && zfs_share(cb.cb_datasets[i]) != 0)
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm ret = -1;
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm }
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm
6733190958bbcc0bd6d1d601e7ae0a6994dafb45dougm free(good);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockout:
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock for (i = 0; i < cb.cb_used; i++)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_close(cb.cb_datasets[i]);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock free(cb.cb_datasets);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (ret);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock}
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlstatic int
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzvol_cb(const char *dataset, void *data)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl{
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl libzfs_handle_t *hdl = data;
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl zfs_handle_t *zhp;
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl /*
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * Ignore snapshots and ignore failures from non-existant datasets.
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl */
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (strchr(dataset, '@') != NULL ||
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl (zhp = zfs_open(hdl, dataset, ZFS_TYPE_VOLUME)) == NULL)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (0);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl (void) zfs_unshare_iscsi(zhp);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl zfs_close(zhp);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (0);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl}
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockstatic int
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockmountpoint_compare(const void *a, const void *b)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock{
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock const char *mounta = *((char **)a);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock const char *mountb = *((char **)b);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (strcmp(mountb, mounta));
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock}
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl/*
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.
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl */
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl#pragma weak zpool_unmount_datasets = zpool_disable_datasets
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockint
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahlzpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock{
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock int used, alloc;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock struct mnttab entry;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock size_t namelen;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock char **mountpoints = NULL;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_handle_t **datasets = NULL;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock libzfs_handle_t *hdl = zhp->zpool_hdl;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock int i;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock int ret = -1;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock int flags = (force ? MS_FORCE : 0);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl /*
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl * First unshare all zvols.
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl */
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl if (zpool_iter_zvol(zhp, zvol_cb, hdl) != 0)
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl return (-1);
f3861e1a2ceec23a5b699c24d814b7775a9e0b52ahl
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock namelen = strlen(zhp->zpool_name);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock rewind(hdl->libzfs_mnttab);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock used = alloc = 0;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Ignore non-ZFS entries.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (entry.mnt_fstype == NULL ||
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock continue;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Ignore filesystems not within this pool.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (entry.mnt_mountp == NULL ||
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 ||
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock (entry.mnt_special[namelen] != '/' &&
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock entry.mnt_special[namelen] != '\0'))
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock continue;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * At this point we've found a filesystem within our pool. Add
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * it to our growing list.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (used == alloc) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (alloc == 0) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if ((mountpoints = zfs_alloc(hdl,
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock 8 * sizeof (void *))) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if ((datasets = zfs_alloc(hdl,
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock 8 * sizeof (void *))) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock alloc = 8;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock } else {
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock void *ptr;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if ((ptr = zfs_realloc(hdl, mountpoints,
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock alloc * sizeof (void *),
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock alloc * 2 * sizeof (void *))) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock mountpoints = ptr;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock if ((ptr = zfs_realloc(hdl, datasets,
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock alloc * sizeof (void *),
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock alloc * 2 * sizeof (void *))) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock datasets = ptr;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock alloc *= 2;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if ((mountpoints[used] = zfs_strdup(hdl,
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock entry.mnt_mountp)) == NULL)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
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 */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock datasets[used] = make_dataset_handle(hdl, entry.mnt_special);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock used++;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * At this point, we have the entire list of filesystems, so sort it by
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * mountpoint.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock qsort(mountpoints, used, sizeof (char *), mountpoint_compare);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Walk through and first unshare everything.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock for (i = 0; i < used; i++) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (is_shared(hdl, mountpoints[i]) &&
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock unshare_one(hdl, mountpoints[i], mountpoints[i]) != 0)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock /*
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * Now unmount everything, removing the underlying directories as
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock * appropriate.
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock */
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock for (i = 0; i < used; i++) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (unmount_one(hdl, mountpoints[i], flags) != 0)
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock goto out;
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
e9dbad6f263d5570ed7ff5443ec5b958af8c24d7eschrock for (i = 0; i < used; i++) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (datasets[i])
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock remove_mountpoint(datasets[i]);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock ret = 0;
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrockout:
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock for (i = 0; i < used; i++) {
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock if (datasets[i])
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock zfs_close(datasets[i]);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock free(mountpoints[i]);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock }
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock free(datasets);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock free(mountpoints);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock return (ret);
3bb79bece53191f2cf27aa61a72ea1784a7ce700eschrock}