1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21f3861e1aSahl 22fa9e4066Sahrens /* 23d1672efbSMarcel Telka * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 24dc7cd546SMark Shellenbaum * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 25*591e0e13SSebastien Roy * Copyright (c) 2014, 2017 by Delphix. All rights reserved. 2688f61deeSIgor Kozhukhov * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 271c18e8fbSJerry Jelinek * Copyright 2017 Joyent, Inc. 284f4378ccSAndrew Stormont * Copyright 2017 RackTop Systems. 29fa9e4066Sahrens */ 30fa9e4066Sahrens 31fa9e4066Sahrens /* 32fa9e4066Sahrens * Routines to manage ZFS mounts. We separate all the nasty routines that have 33f3861e1aSahl * to deal with the OS. The following functions are the main entry points -- 34f3861e1aSahl * they are used by mount and unmount and when changing a filesystem's 35f3861e1aSahl * mountpoint. 36fa9e4066Sahrens * 37*591e0e13SSebastien Roy * zfs_is_mounted() 38*591e0e13SSebastien Roy * zfs_mount() 39*591e0e13SSebastien Roy * zfs_unmount() 40*591e0e13SSebastien Roy * zfs_unmountall() 41fa9e4066Sahrens * 42f3861e1aSahl * This file also contains the functions used to manage sharing filesystems via 43f3861e1aSahl * NFS and iSCSI: 44fa9e4066Sahrens * 45*591e0e13SSebastien Roy * zfs_is_shared() 46*591e0e13SSebastien Roy * zfs_share() 47*591e0e13SSebastien Roy * zfs_unshare() 48f3861e1aSahl * 49*591e0e13SSebastien Roy * zfs_is_shared_nfs() 50*591e0e13SSebastien Roy * zfs_is_shared_smb() 51*591e0e13SSebastien Roy * zfs_share_proto() 52*591e0e13SSebastien Roy * zfs_shareall(); 53*591e0e13SSebastien Roy * zfs_unshare_nfs() 54*591e0e13SSebastien Roy * zfs_unshare_smb() 55*591e0e13SSebastien Roy * zfs_unshareall_nfs() 56da6c28aaSamw * zfs_unshareall_smb() 57da6c28aaSamw * zfs_unshareall() 58da6c28aaSamw * zfs_unshareall_bypath() 593bb79becSeschrock * 603bb79becSeschrock * The following functions are available for pool consumers, and will 61f3861e1aSahl * mount/unmount and share/unshare all datasets within pool: 623bb79becSeschrock * 63*591e0e13SSebastien Roy * zpool_enable_datasets() 64*591e0e13SSebastien Roy * zpool_disable_datasets() 65fa9e4066Sahrens */ 66fa9e4066Sahrens 67fa9e4066Sahrens #include <dirent.h> 68d8d59944Sahl #include <dlfcn.h> 69fa9e4066Sahrens #include <errno.h> 70d420209dSAlex Reece #include <fcntl.h> 71fa9e4066Sahrens #include <libgen.h> 72fa9e4066Sahrens #include <libintl.h> 73fa9e4066Sahrens #include <stdio.h> 74fa9e4066Sahrens #include <stdlib.h> 75fa9e4066Sahrens #include <strings.h> 76fa9e4066Sahrens #include <unistd.h> 77fa9e4066Sahrens #include <zone.h> 78fa9e4066Sahrens #include <sys/mntent.h> 79fa9e4066Sahrens #include <sys/mount.h> 80fa9e4066Sahrens #include <sys/stat.h> 81873c4903SPrakash Surya #include <sys/statvfs.h> 82fa9e4066Sahrens 83fa9e4066Sahrens #include <libzfs.h> 84fa9e4066Sahrens 85fa9e4066Sahrens #include "libzfs_impl.h" 86*591e0e13SSebastien Roy #include "libzfs_taskq.h" 87fa9e4066Sahrens 8867331909Sdougm #include <libshare.h> 8967331909Sdougm #include <sys/systeminfo.h> 9067331909Sdougm #define MAXISALEN 257 /* based on sysinfo(2) man page */ 9167331909Sdougm 92*591e0e13SSebastien Roy static int mount_tq_nthr = 512; /* taskq threads for multi-threaded mounting */ 93*591e0e13SSebastien Roy 94*591e0e13SSebastien Roy static void zfs_mount_task(void *); 95da6c28aaSamw static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); 96da6c28aaSamw zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, 97da6c28aaSamw zfs_share_proto_t); 98da6c28aaSamw 99da6c28aaSamw /* 1004f4378ccSAndrew Stormont * The share protocols table must be in the same order as the zfs_share_proto_t 101da6c28aaSamw * enum in libzfs_impl.h 102da6c28aaSamw */ 103da6c28aaSamw typedef struct { 104da6c28aaSamw zfs_prop_t p_prop; 105da6c28aaSamw char *p_name; 106da6c28aaSamw int p_share_err; 107da6c28aaSamw int p_unshare_err; 108da6c28aaSamw } proto_table_t; 109da6c28aaSamw 110da6c28aaSamw proto_table_t proto_table[PROTO_END] = { 111da6c28aaSamw {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, 112da6c28aaSamw {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, 113da6c28aaSamw }; 114da6c28aaSamw 115da6c28aaSamw zfs_share_proto_t nfs_only[] = { 116da6c28aaSamw PROTO_NFS, 117da6c28aaSamw PROTO_END 118da6c28aaSamw }; 119da6c28aaSamw 120da6c28aaSamw zfs_share_proto_t smb_only[] = { 121da6c28aaSamw PROTO_SMB, 122da6c28aaSamw PROTO_END 123da6c28aaSamw }; 124da6c28aaSamw zfs_share_proto_t share_all_proto[] = { 125da6c28aaSamw PROTO_NFS, 126da6c28aaSamw PROTO_SMB, 127da6c28aaSamw PROTO_END 128da6c28aaSamw }; 129da6c28aaSamw 130fa9e4066Sahrens /* 131da6c28aaSamw * Search the sharetab for the given mountpoint and protocol, returning 132da6c28aaSamw * a zfs_share_type_t value. 133fa9e4066Sahrens */ 134da6c28aaSamw static zfs_share_type_t 135da6c28aaSamw is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) 136fa9e4066Sahrens { 137fa9e4066Sahrens char buf[MAXPATHLEN], *tab; 138da6c28aaSamw char *ptr; 139fa9e4066Sahrens 14099653d4eSeschrock if (hdl->libzfs_sharetab == NULL) 141da6c28aaSamw return (SHARED_NOT_SHARED); 142fa9e4066Sahrens 14399653d4eSeschrock (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); 144fa9e4066Sahrens 14599653d4eSeschrock while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { 146fa9e4066Sahrens 147fa9e4066Sahrens /* the mountpoint is the first entry on each line */ 148da6c28aaSamw if ((tab = strchr(buf, '\t')) == NULL) 149da6c28aaSamw continue; 150da6c28aaSamw 151da6c28aaSamw *tab = '\0'; 152da6c28aaSamw if (strcmp(buf, mountpoint) == 0) { 153da6c28aaSamw /* 154da6c28aaSamw * the protocol field is the third field 155da6c28aaSamw * skip over second field 156da6c28aaSamw */ 157da6c28aaSamw ptr = ++tab; 158da6c28aaSamw if ((tab = strchr(ptr, '\t')) == NULL) 159da6c28aaSamw continue; 160da6c28aaSamw ptr = ++tab; 161da6c28aaSamw if ((tab = strchr(ptr, '\t')) == NULL) 162da6c28aaSamw continue; 163fa9e4066Sahrens *tab = '\0'; 164da6c28aaSamw if (strcmp(ptr, 165da6c28aaSamw proto_table[proto].p_name) == 0) { 166da6c28aaSamw switch (proto) { 167da6c28aaSamw case PROTO_NFS: 168da6c28aaSamw return (SHARED_NFS); 169da6c28aaSamw case PROTO_SMB: 170da6c28aaSamw return (SHARED_SMB); 171da6c28aaSamw default: 172da6c28aaSamw return (0); 173da6c28aaSamw } 174da6c28aaSamw } 175fa9e4066Sahrens } 176fa9e4066Sahrens } 177fa9e4066Sahrens 178da6c28aaSamw return (SHARED_NOT_SHARED); 179fa9e4066Sahrens } 180fa9e4066Sahrens 18199653d4eSeschrock static boolean_t 182873c4903SPrakash Surya dir_is_empty_stat(const char *dirname) 183873c4903SPrakash Surya { 184873c4903SPrakash Surya struct stat st; 185873c4903SPrakash Surya 186873c4903SPrakash Surya /* 187873c4903SPrakash Surya * We only want to return false if the given path is a non empty 188873c4903SPrakash Surya * directory, all other errors are handled elsewhere. 189873c4903SPrakash Surya */ 190873c4903SPrakash Surya if (stat(dirname, &st) < 0 || !S_ISDIR(st.st_mode)) { 191873c4903SPrakash Surya return (B_TRUE); 192873c4903SPrakash Surya } 193873c4903SPrakash Surya 194873c4903SPrakash Surya /* 195873c4903SPrakash Surya * An empty directory will still have two entries in it, one 196873c4903SPrakash Surya * entry for each of "." and "..". 197873c4903SPrakash Surya */ 198873c4903SPrakash Surya if (st.st_size > 2) { 199873c4903SPrakash Surya return (B_FALSE); 200873c4903SPrakash Surya } 201873c4903SPrakash Surya 202873c4903SPrakash Surya return (B_TRUE); 203873c4903SPrakash Surya } 204873c4903SPrakash Surya 205873c4903SPrakash Surya static boolean_t 206873c4903SPrakash Surya dir_is_empty_readdir(const char *dirname) 207fa9e4066Sahrens { 208fa9e4066Sahrens DIR *dirp; 209fa9e4066Sahrens struct dirent64 *dp; 210d420209dSAlex Reece int dirfd; 211fa9e4066Sahrens 212d420209dSAlex Reece if ((dirfd = openat(AT_FDCWD, dirname, 213d420209dSAlex Reece O_RDONLY | O_NDELAY | O_LARGEFILE | O_CLOEXEC, 0)) < 0) { 21499653d4eSeschrock return (B_TRUE); 215d420209dSAlex Reece } 216d420209dSAlex Reece 217d420209dSAlex Reece if ((dirp = fdopendir(dirfd)) == NULL) { 218ba6e7e65SSowrabha Gopal (void) close(dirfd); 219d420209dSAlex Reece return (B_TRUE); 220d420209dSAlex Reece } 221fa9e4066Sahrens 222fa9e4066Sahrens while ((dp = readdir64(dirp)) != NULL) { 223fa9e4066Sahrens 224fa9e4066Sahrens if (strcmp(dp->d_name, ".") == 0 || 225fa9e4066Sahrens strcmp(dp->d_name, "..") == 0) 226fa9e4066Sahrens continue; 227fa9e4066Sahrens 228fa9e4066Sahrens (void) closedir(dirp); 22999653d4eSeschrock return (B_FALSE); 230fa9e4066Sahrens } 231fa9e4066Sahrens 232fa9e4066Sahrens (void) closedir(dirp); 23399653d4eSeschrock return (B_TRUE); 234fa9e4066Sahrens } 235fa9e4066Sahrens 236873c4903SPrakash Surya /* 237873c4903SPrakash Surya * Returns true if the specified directory is empty. If we can't open the 238873c4903SPrakash Surya * directory at all, return true so that the mount can fail with a more 239873c4903SPrakash Surya * informative error message. 240873c4903SPrakash Surya */ 241873c4903SPrakash Surya static boolean_t 242873c4903SPrakash Surya dir_is_empty(const char *dirname) 243873c4903SPrakash Surya { 244873c4903SPrakash Surya struct statvfs64 st; 245873c4903SPrakash Surya 246873c4903SPrakash Surya /* 247873c4903SPrakash Surya * If the statvfs call fails or the filesystem is not a ZFS 248873c4903SPrakash Surya * filesystem, fall back to the slow path which uses readdir. 249873c4903SPrakash Surya */ 250873c4903SPrakash Surya if ((statvfs64(dirname, &st) != 0) || 251873c4903SPrakash Surya (strcmp(st.f_basetype, "zfs") != 0)) { 252873c4903SPrakash Surya return (dir_is_empty_readdir(dirname)); 253873c4903SPrakash Surya } 254873c4903SPrakash Surya 255873c4903SPrakash Surya /* 256873c4903SPrakash Surya * At this point, we know the provided path is on a ZFS 257873c4903SPrakash Surya * filesystem, so we can use stat instead of readdir to 258873c4903SPrakash Surya * determine if the directory is empty or not. We try to avoid 259873c4903SPrakash Surya * using readdir because that requires opening "dirname"; this 260873c4903SPrakash Surya * open file descriptor can potentially end up in a child 261873c4903SPrakash Surya * process if there's a concurrent fork, thus preventing the 262873c4903SPrakash Surya * zfs_mount() from otherwise succeeding (the open file 263873c4903SPrakash Surya * descriptor inherited by the child process will cause the 264873c4903SPrakash Surya * parent's mount to fail with EBUSY). The performance 265873c4903SPrakash Surya * implications of replacing the open, read, and close with a 266873c4903SPrakash Surya * single stat is nice; but is not the main motivation for the 267873c4903SPrakash Surya * added complexity. 268873c4903SPrakash Surya */ 269873c4903SPrakash Surya return (dir_is_empty_stat(dirname)); 270873c4903SPrakash Surya } 271873c4903SPrakash Surya 272fa9e4066Sahrens /* 273fa9e4066Sahrens * Checks to see if the mount is active. If the filesystem is mounted, we fill 274fa9e4066Sahrens * in 'where' with the current mountpoint, and return 1. Otherwise, we return 275fa9e4066Sahrens * 0. 276fa9e4066Sahrens */ 27799653d4eSeschrock boolean_t 27855434c77Sek is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) 279fa9e4066Sahrens { 280ebedde84SEric Taylor struct mnttab entry; 281fa9e4066Sahrens 282ebedde84SEric Taylor if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) 28399653d4eSeschrock return (B_FALSE); 284fa9e4066Sahrens 285fa9e4066Sahrens if (where != NULL) 28655434c77Sek *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); 287fa9e4066Sahrens 28899653d4eSeschrock return (B_TRUE); 289fa9e4066Sahrens } 290fa9e4066Sahrens 29155434c77Sek boolean_t 29255434c77Sek zfs_is_mounted(zfs_handle_t *zhp, char **where) 29355434c77Sek { 29455434c77Sek return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); 29555434c77Sek } 29655434c77Sek 297e9dbad6fSeschrock /* 298e9dbad6fSeschrock * Returns true if the given dataset is mountable, false otherwise. Returns the 299e9dbad6fSeschrock * mountpoint in 'buf'. 300e9dbad6fSeschrock */ 301e9dbad6fSeschrock static boolean_t 302e9dbad6fSeschrock zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, 303990b4856Slling zprop_source_t *source) 304e9dbad6fSeschrock { 3059adfa60dSMatthew Ahrens char sourceloc[MAXNAMELEN]; 306990b4856Slling zprop_source_t sourcetype; 307e9dbad6fSeschrock 308e9dbad6fSeschrock if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) 309e9dbad6fSeschrock return (B_FALSE); 310e9dbad6fSeschrock 311e9dbad6fSeschrock verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, 312e9dbad6fSeschrock &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); 313e9dbad6fSeschrock 314e9dbad6fSeschrock if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || 315e9dbad6fSeschrock strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) 316e9dbad6fSeschrock return (B_FALSE); 317e9dbad6fSeschrock 318a227b7f4Shs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) 319e9dbad6fSeschrock return (B_FALSE); 320e9dbad6fSeschrock 321e9dbad6fSeschrock if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && 322e9dbad6fSeschrock getzoneid() == GLOBAL_ZONEID) 323e9dbad6fSeschrock return (B_FALSE); 324e9dbad6fSeschrock 325e9dbad6fSeschrock if (source) 326e9dbad6fSeschrock *source = sourcetype; 327e9dbad6fSeschrock 328e9dbad6fSeschrock return (B_TRUE); 329e9dbad6fSeschrock } 330e9dbad6fSeschrock 331fa9e4066Sahrens /* 332fa9e4066Sahrens * Mount the given filesystem. 333fa9e4066Sahrens */ 334fa9e4066Sahrens int 335fa9e4066Sahrens zfs_mount(zfs_handle_t *zhp, const char *options, int flags) 336fa9e4066Sahrens { 337fa9e4066Sahrens struct stat buf; 338fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 339fa9e4066Sahrens char mntopts[MNT_LINE_MAX]; 34099653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 341fa9e4066Sahrens 342fa9e4066Sahrens if (options == NULL) 343fa9e4066Sahrens mntopts[0] = '\0'; 344fa9e4066Sahrens else 345fa9e4066Sahrens (void) strlcpy(mntopts, options, sizeof (mntopts)); 346fa9e4066Sahrens 347f9af39baSGeorge Wilson /* 348f9af39baSGeorge Wilson * If the pool is imported read-only then all mounts must be read-only 349f9af39baSGeorge Wilson */ 350f9af39baSGeorge Wilson if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL)) 351f9af39baSGeorge Wilson flags |= MS_RDONLY; 352f9af39baSGeorge Wilson 353e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 35499653d4eSeschrock return (0); 355fa9e4066Sahrens 356fa9e4066Sahrens /* Create the directory if it doesn't already exist */ 357fa9e4066Sahrens if (lstat(mountpoint, &buf) != 0) { 358fa9e4066Sahrens if (mkdirp(mountpoint, 0755) != 0) { 35999653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 36099653d4eSeschrock "failed to create mountpoint")); 361ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 36299653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 36399653d4eSeschrock mountpoint)); 364fa9e4066Sahrens } 365fa9e4066Sahrens } 366fa9e4066Sahrens 367fa9e4066Sahrens /* 368fa9e4066Sahrens * Determine if the mountpoint is empty. If so, refuse to perform the 369fa9e4066Sahrens * mount. We don't perform this check if MS_OVERLAY is specified, which 370fa9e4066Sahrens * would defeat the point. We also avoid this check if 'remount' is 371fa9e4066Sahrens * specified. 372fa9e4066Sahrens */ 373fa9e4066Sahrens if ((flags & MS_OVERLAY) == 0 && 374fa9e4066Sahrens strstr(mntopts, MNTOPT_REMOUNT) == NULL && 375fa9e4066Sahrens !dir_is_empty(mountpoint)) { 37699653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 37799653d4eSeschrock "directory is not empty")); 378ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 37999653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); 380fa9e4066Sahrens } 381fa9e4066Sahrens 382fa9e4066Sahrens /* perform the mount */ 383fa9e4066Sahrens if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, 384fa9e4066Sahrens MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { 385fa9e4066Sahrens /* 386fa9e4066Sahrens * Generic errors are nasty, but there are just way too many 387fa9e4066Sahrens * from mount(), and they're well-understood. We pick a few 388fa9e4066Sahrens * common ones to improve upon. 389fa9e4066Sahrens */ 390d8689a57Sdougm if (errno == EBUSY) { 39199653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 39299653d4eSeschrock "mountpoint or dataset is busy")); 393ecd6cf80Smarks } else if (errno == EPERM) { 394ecd6cf80Smarks zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 395ecd6cf80Smarks "Insufficient privileges")); 39654a91118SChris Kirby } else if (errno == ENOTSUP) { 39754a91118SChris Kirby char buf[256]; 398dc7cd546SMark Shellenbaum int spa_version; 39954a91118SChris Kirby 400dc7cd546SMark Shellenbaum VERIFY(zfs_spa_version(zhp, &spa_version) == 0); 40154a91118SChris Kirby (void) snprintf(buf, sizeof (buf), 402dc7cd546SMark Shellenbaum dgettext(TEXT_DOMAIN, "Can't mount a version %lld " 403dc7cd546SMark Shellenbaum "file system on a version %d pool. Pool must be" 404dc7cd546SMark Shellenbaum " upgraded to mount this file system."), 40554a91118SChris Kirby (u_longlong_t)zfs_prop_get_int(zhp, 406dc7cd546SMark Shellenbaum ZFS_PROP_VERSION), spa_version); 40754a91118SChris Kirby zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); 408d8689a57Sdougm } else { 40999653d4eSeschrock zfs_error_aux(hdl, strerror(errno)); 410d8689a57Sdougm } 411ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 41299653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 41399653d4eSeschrock zhp->zfs_name)); 414fa9e4066Sahrens } 415fa9e4066Sahrens 416ebedde84SEric Taylor /* add the mounted entry into our cache */ 417ebedde84SEric Taylor libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, 418ebedde84SEric Taylor mntopts); 419fa9e4066Sahrens return (0); 420fa9e4066Sahrens } 421fa9e4066Sahrens 4223bb79becSeschrock /* 4233bb79becSeschrock * Unmount a single filesystem. 4243bb79becSeschrock */ 4253bb79becSeschrock static int 4263bb79becSeschrock unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) 4273bb79becSeschrock { 4283bb79becSeschrock if (umount2(mountpoint, flags) != 0) { 4293bb79becSeschrock zfs_error_aux(hdl, strerror(errno)); 430ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, 4313bb79becSeschrock dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), 4323bb79becSeschrock mountpoint)); 4333bb79becSeschrock } 4343bb79becSeschrock 4353bb79becSeschrock return (0); 4363bb79becSeschrock } 4373bb79becSeschrock 438fa9e4066Sahrens /* 439fa9e4066Sahrens * Unmount the given filesystem. 440fa9e4066Sahrens */ 441fa9e4066Sahrens int 442fa9e4066Sahrens zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) 443fa9e4066Sahrens { 444ebedde84SEric Taylor libzfs_handle_t *hdl = zhp->zfs_hdl; 445ebedde84SEric Taylor struct mnttab entry; 44667331909Sdougm char *mntpt = NULL; 447fa9e4066Sahrens 448ebedde84SEric Taylor /* check to see if we need to unmount the filesystem */ 449fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 450ebedde84SEric Taylor libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { 45167331909Sdougm /* 45267331909Sdougm * mountpoint may have come from a call to 45367331909Sdougm * getmnt/getmntany if it isn't NULL. If it is NULL, 454ebedde84SEric Taylor * we know it comes from libzfs_mnttab_find which can 455ebedde84SEric Taylor * then get freed later. We strdup it to play it safe. 45667331909Sdougm */ 457fa9e4066Sahrens if (mountpoint == NULL) 458ebedde84SEric Taylor mntpt = zfs_strdup(hdl, entry.mnt_mountp); 45967331909Sdougm else 460ebedde84SEric Taylor mntpt = zfs_strdup(hdl, mountpoint); 461fa9e4066Sahrens 462fa9e4066Sahrens /* 4633bb79becSeschrock * Unshare and unmount the filesystem 464fa9e4066Sahrens */ 465da6c28aaSamw if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) 466eb66cf86Sth return (-1); 467eb66cf86Sth 468ebedde84SEric Taylor if (unmount_one(hdl, mntpt, flags) != 0) { 46967331909Sdougm free(mntpt); 470da6c28aaSamw (void) zfs_shareall(zhp); 471fa9e4066Sahrens return (-1); 47267331909Sdougm } 473ebedde84SEric Taylor libzfs_mnttab_remove(hdl, zhp->zfs_name); 47467331909Sdougm free(mntpt); 475fa9e4066Sahrens } 476fa9e4066Sahrens 477fa9e4066Sahrens return (0); 478fa9e4066Sahrens } 479fa9e4066Sahrens 480fa9e4066Sahrens /* 481fa9e4066Sahrens * Unmount this filesystem and any children inheriting the mountpoint property. 482fa9e4066Sahrens * To do this, just act like we're changing the mountpoint property, but don't 483fa9e4066Sahrens * remount the filesystems afterwards. 484fa9e4066Sahrens */ 485fa9e4066Sahrens int 486fa9e4066Sahrens zfs_unmountall(zfs_handle_t *zhp, int flags) 487fa9e4066Sahrens { 488fa9e4066Sahrens prop_changelist_t *clp; 489fa9e4066Sahrens int ret; 490fa9e4066Sahrens 4910069fd67STim Haley clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); 492fa9e4066Sahrens if (clp == NULL) 493fa9e4066Sahrens return (-1); 494fa9e4066Sahrens 495fa9e4066Sahrens ret = changelist_prefix(clp); 496fa9e4066Sahrens changelist_free(clp); 497fa9e4066Sahrens 498fa9e4066Sahrens return (ret); 499fa9e4066Sahrens } 500fa9e4066Sahrens 501f3861e1aSahl boolean_t 502f3861e1aSahl zfs_is_shared(zfs_handle_t *zhp) 503f3861e1aSahl { 504da6c28aaSamw zfs_share_type_t rc = 0; 505da6c28aaSamw zfs_share_proto_t *curr_proto; 506da6c28aaSamw 507f3861e1aSahl if (ZFS_IS_VOLUME(zhp)) 508ab003da8SJim Dunham return (B_FALSE); 509f3861e1aSahl 510da6c28aaSamw for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 511da6c28aaSamw curr_proto++) 512da6c28aaSamw rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); 513da6c28aaSamw 514da6c28aaSamw return (rc ? B_TRUE : B_FALSE); 515f3861e1aSahl } 516f3861e1aSahl 517f3861e1aSahl int 518f3861e1aSahl zfs_share(zfs_handle_t *zhp) 519f3861e1aSahl { 5209d9a58e3SEric Taylor assert(!ZFS_IS_VOLUME(zhp)); 521da6c28aaSamw return (zfs_share_proto(zhp, share_all_proto)); 522f3861e1aSahl } 523f3861e1aSahl 524f3861e1aSahl int 525f3861e1aSahl zfs_unshare(zfs_handle_t *zhp) 526f3861e1aSahl { 5279d9a58e3SEric Taylor assert(!ZFS_IS_VOLUME(zhp)); 528da6c28aaSamw return (zfs_unshareall(zhp)); 529f3861e1aSahl } 530f3861e1aSahl 531fa9e4066Sahrens /* 532fa9e4066Sahrens * Check to see if the filesystem is currently shared. 533fa9e4066Sahrens */ 534da6c28aaSamw zfs_share_type_t 535da6c28aaSamw zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) 536fa9e4066Sahrens { 537fa9e4066Sahrens char *mountpoint; 538da6c28aaSamw zfs_share_type_t rc; 539fa9e4066Sahrens 540fa9e4066Sahrens if (!zfs_is_mounted(zhp, &mountpoint)) 541da6c28aaSamw return (SHARED_NOT_SHARED); 542fa9e4066Sahrens 54388f61deeSIgor Kozhukhov if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) 54488f61deeSIgor Kozhukhov != SHARED_NOT_SHARED) { 545fa9e4066Sahrens if (where != NULL) 546fa9e4066Sahrens *where = mountpoint; 547fa9e4066Sahrens else 548fa9e4066Sahrens free(mountpoint); 549da6c28aaSamw return (rc); 550fa9e4066Sahrens } else { 551fa9e4066Sahrens free(mountpoint); 552da6c28aaSamw return (SHARED_NOT_SHARED); 553fa9e4066Sahrens } 554fa9e4066Sahrens } 555fa9e4066Sahrens 556da6c28aaSamw boolean_t 557da6c28aaSamw zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) 558da6c28aaSamw { 559da6c28aaSamw return (zfs_is_shared_proto(zhp, where, 560da6c28aaSamw PROTO_NFS) != SHARED_NOT_SHARED); 561da6c28aaSamw } 562da6c28aaSamw 563da6c28aaSamw boolean_t 564da6c28aaSamw zfs_is_shared_smb(zfs_handle_t *zhp, char **where) 565da6c28aaSamw { 566da6c28aaSamw return (zfs_is_shared_proto(zhp, where, 567da6c28aaSamw PROTO_SMB) != SHARED_NOT_SHARED); 568da6c28aaSamw } 569da6c28aaSamw 57067331909Sdougm /* 57167331909Sdougm * Make sure things will work if libshare isn't installed by using 57267331909Sdougm * wrapper functions that check to see that the pointers to functions 57367331909Sdougm * initialized in _zfs_init_libshare() are actually present. 57467331909Sdougm */ 57567331909Sdougm 57667331909Sdougm static sa_handle_t (*_sa_init)(int); 5778a981c33SDaniel Hoffman static sa_handle_t (*_sa_init_arg)(int, void *); 57867331909Sdougm static void (*_sa_fini)(sa_handle_t); 57967331909Sdougm static sa_share_t (*_sa_find_share)(sa_handle_t, char *); 58067331909Sdougm static int (*_sa_enable_share)(sa_share_t, char *); 58167331909Sdougm static int (*_sa_disable_share)(sa_share_t, char *); 58267331909Sdougm static char *(*_sa_errorstr)(int); 58367331909Sdougm static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); 5845b6e0c46Sdougm static boolean_t (*_sa_needs_refresh)(sa_handle_t *); 5855b6e0c46Sdougm static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); 5865b6e0c46Sdougm static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, 5875b6e0c46Sdougm char *, char *, zprop_source_t, char *, char *, char *); 5885b6e0c46Sdougm static void (*_sa_update_sharetab_ts)(sa_handle_t); 58967331909Sdougm 59067331909Sdougm /* 59167331909Sdougm * _zfs_init_libshare() 59267331909Sdougm * 59367331909Sdougm * Find the libshare.so.1 entry points that we use here and save the 59467331909Sdougm * values to be used later. This is triggered by the runtime loader. 59567331909Sdougm * Make sure the correct ISA version is loaded. 59667331909Sdougm */ 5975b6e0c46Sdougm 59867331909Sdougm #pragma init(_zfs_init_libshare) 59967331909Sdougm static void 60067331909Sdougm _zfs_init_libshare(void) 60167331909Sdougm { 60267331909Sdougm void *libshare; 60367331909Sdougm char path[MAXPATHLEN]; 60467331909Sdougm char isa[MAXISALEN]; 60567331909Sdougm 60667331909Sdougm #if defined(_LP64) 60767331909Sdougm if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) 608d8689a57Sdougm isa[0] = '\0'; 60967331909Sdougm #else 61067331909Sdougm isa[0] = '\0'; 61167331909Sdougm #endif 61267331909Sdougm (void) snprintf(path, MAXPATHLEN, 613d8689a57Sdougm "/usr/lib/%s/libshare.so.1", isa); 61467331909Sdougm 61567331909Sdougm if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { 616d8689a57Sdougm _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); 6178a981c33SDaniel Hoffman _sa_init_arg = (sa_handle_t (*)(int, void *))dlsym(libshare, 6188a981c33SDaniel Hoffman "sa_init_arg"); 619d8689a57Sdougm _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); 620d8689a57Sdougm _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) 621d8689a57Sdougm dlsym(libshare, "sa_find_share"); 622d8689a57Sdougm _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 623d8689a57Sdougm "sa_enable_share"); 624d8689a57Sdougm _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 625d8689a57Sdougm "sa_disable_share"); 626d8689a57Sdougm _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); 627d8689a57Sdougm _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) 628d8689a57Sdougm dlsym(libshare, "sa_parse_legacy_options"); 6295b6e0c46Sdougm _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) 6305b6e0c46Sdougm dlsym(libshare, "sa_needs_refresh"); 6315b6e0c46Sdougm _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) 6325b6e0c46Sdougm dlsym(libshare, "sa_get_zfs_handle"); 6335b6e0c46Sdougm _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, 6345b6e0c46Sdougm sa_share_t, char *, char *, zprop_source_t, char *, 6355b6e0c46Sdougm char *, char *))dlsym(libshare, "sa_zfs_process_share"); 6365b6e0c46Sdougm _sa_update_sharetab_ts = (void (*)(sa_handle_t)) 6375b6e0c46Sdougm dlsym(libshare, "sa_update_sharetab_ts"); 6388a981c33SDaniel Hoffman if (_sa_init == NULL || _sa_init_arg == NULL || 6398a981c33SDaniel Hoffman _sa_fini == NULL || _sa_find_share == NULL || 6408a981c33SDaniel Hoffman _sa_enable_share == NULL || _sa_disable_share == NULL || 6418a981c33SDaniel Hoffman _sa_errorstr == NULL || _sa_parse_legacy_options == NULL || 6425b6e0c46Sdougm _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || 6435b6e0c46Sdougm _sa_zfs_process_share == NULL || 6445b6e0c46Sdougm _sa_update_sharetab_ts == NULL) { 64557b448deSdougm _sa_init = NULL; 6468a981c33SDaniel Hoffman _sa_init_arg = NULL; 64757b448deSdougm _sa_fini = NULL; 64857b448deSdougm _sa_disable_share = NULL; 64957b448deSdougm _sa_enable_share = NULL; 65057b448deSdougm _sa_errorstr = NULL; 65157b448deSdougm _sa_parse_legacy_options = NULL; 65257b448deSdougm (void) dlclose(libshare); 6535b6e0c46Sdougm _sa_needs_refresh = NULL; 6545b6e0c46Sdougm _sa_get_zfs_handle = NULL; 6555b6e0c46Sdougm _sa_zfs_process_share = NULL; 6565b6e0c46Sdougm _sa_update_sharetab_ts = NULL; 65757b448deSdougm } 65867331909Sdougm } 65967331909Sdougm } 66067331909Sdougm 66167331909Sdougm /* 66267331909Sdougm * zfs_init_libshare(zhandle, service) 66367331909Sdougm * 66467331909Sdougm * Initialize the libshare API if it hasn't already been initialized. 66567331909Sdougm * In all cases it returns 0 if it succeeded and an error if not. The 66667331909Sdougm * service value is which part(s) of the API to initialize and is a 66767331909Sdougm * direct map to the libshare sa_init(service) interface. 66867331909Sdougm */ 6698a981c33SDaniel Hoffman static int 6708a981c33SDaniel Hoffman zfs_init_libshare_impl(libzfs_handle_t *zhandle, int service, void *arg) 67167331909Sdougm { 6721c18e8fbSJerry Jelinek /* 6731c18e8fbSJerry Jelinek * libshare is either not installed or we're in a branded zone. The 6741c18e8fbSJerry Jelinek * rest of the wrapper functions around the libshare calls already 6751c18e8fbSJerry Jelinek * handle NULL function pointers, but we don't want the callers of 6761c18e8fbSJerry Jelinek * zfs_init_libshare() to fail prematurely if libshare is not available. 6771c18e8fbSJerry Jelinek */ 678d8689a57Sdougm if (_sa_init == NULL) 6791c18e8fbSJerry Jelinek return (SA_OK); 680d8689a57Sdougm 68109c9e6dcSChris Williamson /* 68209c9e6dcSChris Williamson * Attempt to refresh libshare. This is necessary if there was a cache 68309c9e6dcSChris Williamson * miss for a new ZFS dataset that was just created, or if state of the 68409c9e6dcSChris Williamson * sharetab file has changed since libshare was last initialized. We 68509c9e6dcSChris Williamson * want to make sure so check timestamps to see if a different process 68609c9e6dcSChris Williamson * has updated any of the configuration. If there was some non-ZFS 68709c9e6dcSChris Williamson * change, we need to re-initialize the internal cache. 68809c9e6dcSChris Williamson */ 68909c9e6dcSChris Williamson if (_sa_needs_refresh != NULL && 69009c9e6dcSChris Williamson _sa_needs_refresh(zhandle->libzfs_sharehdl)) { 69109c9e6dcSChris Williamson zfs_uninit_libshare(zhandle); 6928a981c33SDaniel Hoffman zhandle->libzfs_sharehdl = _sa_init_arg(service, arg); 6935b6e0c46Sdougm } 6945b6e0c46Sdougm 69509c9e6dcSChris Williamson if (zhandle && zhandle->libzfs_sharehdl == NULL) 6968a981c33SDaniel Hoffman zhandle->libzfs_sharehdl = _sa_init_arg(service, arg); 697d8689a57Sdougm 69809c9e6dcSChris Williamson if (zhandle->libzfs_sharehdl == NULL) 69909c9e6dcSChris Williamson return (SA_NO_MEMORY); 700d8689a57Sdougm 70109c9e6dcSChris Williamson return (SA_OK); 70267331909Sdougm } 7038a981c33SDaniel Hoffman int 7048a981c33SDaniel Hoffman zfs_init_libshare(libzfs_handle_t *zhandle, int service) 7058a981c33SDaniel Hoffman { 7068a981c33SDaniel Hoffman return (zfs_init_libshare_impl(zhandle, service, NULL)); 7078a981c33SDaniel Hoffman } 7088a981c33SDaniel Hoffman 7098a981c33SDaniel Hoffman int 7108a981c33SDaniel Hoffman zfs_init_libshare_arg(libzfs_handle_t *zhandle, int service, void *arg) 7118a981c33SDaniel Hoffman { 7128a981c33SDaniel Hoffman return (zfs_init_libshare_impl(zhandle, service, arg)); 7138a981c33SDaniel Hoffman } 7148a981c33SDaniel Hoffman 71567331909Sdougm 71667331909Sdougm /* 71767331909Sdougm * zfs_uninit_libshare(zhandle) 71867331909Sdougm * 71967331909Sdougm * Uninitialize the libshare API if it hasn't already been 72067331909Sdougm * uninitialized. It is OK to call multiple times. 72167331909Sdougm */ 72267331909Sdougm void 72367331909Sdougm zfs_uninit_libshare(libzfs_handle_t *zhandle) 72467331909Sdougm { 72567331909Sdougm if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { 726d8689a57Sdougm if (_sa_fini != NULL) 727d8689a57Sdougm _sa_fini(zhandle->libzfs_sharehdl); 728d8689a57Sdougm zhandle->libzfs_sharehdl = NULL; 72967331909Sdougm } 73067331909Sdougm } 73167331909Sdougm 73267331909Sdougm /* 73367331909Sdougm * zfs_parse_options(options, proto) 73467331909Sdougm * 73567331909Sdougm * Call the legacy parse interface to get the protocol specific 73667331909Sdougm * options using the NULL arg to indicate that this is a "parse" only. 73767331909Sdougm */ 73867331909Sdougm int 739da6c28aaSamw zfs_parse_options(char *options, zfs_share_proto_t proto) 74067331909Sdougm { 7413cb34c60Sahrens if (_sa_parse_legacy_options != NULL) { 7423cb34c60Sahrens return (_sa_parse_legacy_options(NULL, options, 7433cb34c60Sahrens proto_table[proto].p_name)); 7443cb34c60Sahrens } 7453cb34c60Sahrens return (SA_CONFIG_ERR); 74667331909Sdougm } 74767331909Sdougm 74867331909Sdougm /* 74967331909Sdougm * zfs_sa_find_share(handle, path) 75067331909Sdougm * 75167331909Sdougm * wrapper around sa_find_share to find a share path in the 75267331909Sdougm * configuration. 75367331909Sdougm */ 75467331909Sdougm static sa_share_t 75567331909Sdougm zfs_sa_find_share(sa_handle_t handle, char *path) 75667331909Sdougm { 75767331909Sdougm if (_sa_find_share != NULL) 758d8689a57Sdougm return (_sa_find_share(handle, path)); 75967331909Sdougm return (NULL); 76067331909Sdougm } 76167331909Sdougm 76267331909Sdougm /* 76367331909Sdougm * zfs_sa_enable_share(share, proto) 76467331909Sdougm * 76567331909Sdougm * Wrapper for sa_enable_share which enables a share for a specified 76667331909Sdougm * protocol. 76767331909Sdougm */ 76867331909Sdougm static int 76967331909Sdougm zfs_sa_enable_share(sa_share_t share, char *proto) 77067331909Sdougm { 77167331909Sdougm if (_sa_enable_share != NULL) 772d8689a57Sdougm return (_sa_enable_share(share, proto)); 77367331909Sdougm return (SA_CONFIG_ERR); 77467331909Sdougm } 77567331909Sdougm 77667331909Sdougm /* 77767331909Sdougm * zfs_sa_disable_share(share, proto) 77867331909Sdougm * 77967331909Sdougm * Wrapper for sa_enable_share which disables a share for a specified 78067331909Sdougm * protocol. 78167331909Sdougm */ 78267331909Sdougm static int 78367331909Sdougm zfs_sa_disable_share(sa_share_t share, char *proto) 78467331909Sdougm { 78567331909Sdougm if (_sa_disable_share != NULL) 786d8689a57Sdougm return (_sa_disable_share(share, proto)); 78767331909Sdougm return (SA_CONFIG_ERR); 78867331909Sdougm } 78967331909Sdougm 790fa9e4066Sahrens /* 791da6c28aaSamw * Share the given filesystem according to the options in the specified 792da6c28aaSamw * protocol specific properties (sharenfs, sharesmb). We rely 79367331909Sdougm * on "libshare" to the dirty work for us. 794fa9e4066Sahrens */ 795da6c28aaSamw static int 796da6c28aaSamw zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 797fa9e4066Sahrens { 798fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 799fa9e4066Sahrens char shareopts[ZFS_MAXPROPLEN]; 8005b6e0c46Sdougm char sourcestr[ZFS_MAXPROPLEN]; 80199653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 80267331909Sdougm sa_share_t share; 803da6c28aaSamw zfs_share_proto_t *curr_proto; 8045b6e0c46Sdougm zprop_source_t sourcetype; 80567331909Sdougm int ret; 806fa9e4066Sahrens 807e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 808fa9e4066Sahrens return (0); 809fa9e4066Sahrens 810da6c28aaSamw for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { 811da6c28aaSamw /* 812da6c28aaSamw * Return success if there are no share options. 813da6c28aaSamw */ 814da6c28aaSamw if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, 8155b6e0c46Sdougm shareopts, sizeof (shareopts), &sourcetype, sourcestr, 8165b6e0c46Sdougm ZFS_MAXPROPLEN, B_FALSE) != 0 || 8175b6e0c46Sdougm strcmp(shareopts, "off") == 0) 818da6c28aaSamw continue; 8198a981c33SDaniel Hoffman ret = zfs_init_libshare_arg(hdl, SA_INIT_ONE_SHARE_FROM_HANDLE, 8208a981c33SDaniel Hoffman zhp); 82133cde0d0SMatthew Ahrens if (ret != SA_OK) { 82233cde0d0SMatthew Ahrens (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 82333cde0d0SMatthew Ahrens dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), 82433cde0d0SMatthew Ahrens zfs_get_name(zhp), _sa_errorstr != NULL ? 82533cde0d0SMatthew Ahrens _sa_errorstr(ret) : ""); 82633cde0d0SMatthew Ahrens return (-1); 82733cde0d0SMatthew Ahrens } 82833cde0d0SMatthew Ahrens 829da6c28aaSamw /* 830da6c28aaSamw * If the 'zoned' property is set, then zfs_is_mountable() 831da6c28aaSamw * will have already bailed out if we are in the global zone. 832da6c28aaSamw * But local zones cannot be NFS servers, so we ignore it for 833da6c28aaSamw * local zones as well. 834da6c28aaSamw */ 835da6c28aaSamw if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) 836da6c28aaSamw continue; 837da6c28aaSamw 838da6c28aaSamw share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); 8395b6e0c46Sdougm if (share == NULL) { 8405b6e0c46Sdougm /* 8415b6e0c46Sdougm * This may be a new file system that was just 8425b6e0c46Sdougm * created so isn't in the internal cache 8435b6e0c46Sdougm * (second time through). Rather than 8445b6e0c46Sdougm * reloading the entire configuration, we can 8455b6e0c46Sdougm * assume ZFS has done the checking and it is 8465b6e0c46Sdougm * safe to add this to the internal 8475b6e0c46Sdougm * configuration. 8485b6e0c46Sdougm */ 8495b6e0c46Sdougm if (_sa_zfs_process_share(hdl->libzfs_sharehdl, 8505b6e0c46Sdougm NULL, NULL, mountpoint, 8515b6e0c46Sdougm proto_table[*curr_proto].p_name, sourcetype, 8525b6e0c46Sdougm shareopts, sourcestr, zhp->zfs_name) != SA_OK) { 8535b6e0c46Sdougm (void) zfs_error_fmt(hdl, 8545b6e0c46Sdougm proto_table[*curr_proto].p_share_err, 8555b6e0c46Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 8565b6e0c46Sdougm zfs_get_name(zhp)); 8575b6e0c46Sdougm return (-1); 8585b6e0c46Sdougm } 8595b6e0c46Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, 8605b6e0c46Sdougm mountpoint); 8615b6e0c46Sdougm } 862da6c28aaSamw if (share != NULL) { 863da6c28aaSamw int err; 864da6c28aaSamw err = zfs_sa_enable_share(share, 865da6c28aaSamw proto_table[*curr_proto].p_name); 866da6c28aaSamw if (err != SA_OK) { 867da6c28aaSamw (void) zfs_error_fmt(hdl, 868da6c28aaSamw proto_table[*curr_proto].p_share_err, 869da6c28aaSamw dgettext(TEXT_DOMAIN, "cannot share '%s'"), 870da6c28aaSamw zfs_get_name(zhp)); 871da6c28aaSamw return (-1); 872da6c28aaSamw } 873da6c28aaSamw } else { 874da6c28aaSamw (void) zfs_error_fmt(hdl, 875da6c28aaSamw proto_table[*curr_proto].p_share_err, 876d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 877d8689a57Sdougm zfs_get_name(zhp)); 878d8689a57Sdougm return (-1); 879d8689a57Sdougm } 880fa9e4066Sahrens 881da6c28aaSamw } 882fa9e4066Sahrens return (0); 883fa9e4066Sahrens } 884fa9e4066Sahrens 885da6c28aaSamw 886da6c28aaSamw int 887da6c28aaSamw zfs_share_nfs(zfs_handle_t *zhp) 888da6c28aaSamw { 889da6c28aaSamw return (zfs_share_proto(zhp, nfs_only)); 890da6c28aaSamw } 891da6c28aaSamw 892da6c28aaSamw int 893da6c28aaSamw zfs_share_smb(zfs_handle_t *zhp) 894da6c28aaSamw { 895da6c28aaSamw return (zfs_share_proto(zhp, smb_only)); 896da6c28aaSamw } 897da6c28aaSamw 898da6c28aaSamw int 899da6c28aaSamw zfs_shareall(zfs_handle_t *zhp) 900da6c28aaSamw { 901da6c28aaSamw return (zfs_share_proto(zhp, share_all_proto)); 902da6c28aaSamw } 903da6c28aaSamw 9043bb79becSeschrock /* 9053bb79becSeschrock * Unshare a filesystem by mountpoint. 9063bb79becSeschrock */ 9073bb79becSeschrock static int 908da6c28aaSamw unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, 909da6c28aaSamw zfs_share_proto_t proto) 9103bb79becSeschrock { 91167331909Sdougm sa_share_t share; 91267331909Sdougm int err; 91367331909Sdougm char *mntpt; 9148a981c33SDaniel Hoffman 9153bb79becSeschrock /* 91667331909Sdougm * Mountpoint could get trashed if libshare calls getmntany 917ebedde84SEric Taylor * which it does during API initialization, so strdup the 91867331909Sdougm * value. 9193bb79becSeschrock */ 92067331909Sdougm mntpt = zfs_strdup(hdl, mountpoint); 9213bb79becSeschrock 9228a981c33SDaniel Hoffman /* 9238a981c33SDaniel Hoffman * make sure libshare initialized, initialize everything because we 9248a981c33SDaniel Hoffman * don't know what other unsharing may happen later. Functions up the 9258a981c33SDaniel Hoffman * stack are allowed to initialize instead a subset of shares at the 9268a981c33SDaniel Hoffman * time the set is known. 9278a981c33SDaniel Hoffman */ 9288a981c33SDaniel Hoffman if ((err = zfs_init_libshare_arg(hdl, SA_INIT_ONE_SHARE_FROM_NAME, 9298a981c33SDaniel Hoffman (void *)name)) != SA_OK) { 93067331909Sdougm free(mntpt); /* don't need the copy anymore */ 9314f4378ccSAndrew Stormont return (zfs_error_fmt(hdl, proto_table[proto].p_unshare_err, 932d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 933d8689a57Sdougm name, _sa_errorstr(err))); 93467331909Sdougm } 9353bb79becSeschrock 93667331909Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); 93767331909Sdougm free(mntpt); /* don't need the copy anymore */ 9383bb79becSeschrock 93967331909Sdougm if (share != NULL) { 940da6c28aaSamw err = zfs_sa_disable_share(share, proto_table[proto].p_name); 94167331909Sdougm if (err != SA_OK) { 9424f4378ccSAndrew Stormont return (zfs_error_fmt(hdl, 9434f4378ccSAndrew Stormont proto_table[proto].p_unshare_err, 944d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 945d8689a57Sdougm name, _sa_errorstr(err))); 94667331909Sdougm } 94767331909Sdougm } else { 9484f4378ccSAndrew Stormont return (zfs_error_fmt(hdl, proto_table[proto].p_unshare_err, 949d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), 950d8689a57Sdougm name)); 9513bb79becSeschrock } 9523bb79becSeschrock return (0); 9533bb79becSeschrock } 9543bb79becSeschrock 955fa9e4066Sahrens /* 956fa9e4066Sahrens * Unshare the given filesystem. 957fa9e4066Sahrens */ 958fa9e4066Sahrens int 959da6c28aaSamw zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, 960da6c28aaSamw zfs_share_proto_t *proto) 961fa9e4066Sahrens { 962ebedde84SEric Taylor libzfs_handle_t *hdl = zhp->zfs_hdl; 963ebedde84SEric Taylor struct mnttab entry; 96467331909Sdougm char *mntpt = NULL; 965fa9e4066Sahrens 966fa9e4066Sahrens /* check to see if need to unmount the filesystem */ 96799653d4eSeschrock rewind(zhp->zfs_hdl->libzfs_mnttab); 968d8689a57Sdougm if (mountpoint != NULL) 969ebedde84SEric Taylor mountpoint = mntpt = zfs_strdup(hdl, mountpoint); 970d8689a57Sdougm 971fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 972ebedde84SEric Taylor libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { 973da6c28aaSamw zfs_share_proto_t *curr_proto; 974fa9e4066Sahrens 975fa9e4066Sahrens if (mountpoint == NULL) 976da6c28aaSamw mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); 977fa9e4066Sahrens 978da6c28aaSamw for (curr_proto = proto; *curr_proto != PROTO_END; 979da6c28aaSamw curr_proto++) { 980da6c28aaSamw 981ebedde84SEric Taylor if (is_shared(hdl, mntpt, *curr_proto) && 982ebedde84SEric Taylor unshare_one(hdl, zhp->zfs_name, 983da6c28aaSamw mntpt, *curr_proto) != 0) { 984da6c28aaSamw if (mntpt != NULL) 985da6c28aaSamw free(mntpt); 986da6c28aaSamw return (-1); 987da6c28aaSamw } 98867331909Sdougm } 989fa9e4066Sahrens } 99067331909Sdougm if (mntpt != NULL) 991d8689a57Sdougm free(mntpt); 992fa9e4066Sahrens 993fa9e4066Sahrens return (0); 994fa9e4066Sahrens } 995fa9e4066Sahrens 996da6c28aaSamw int 997da6c28aaSamw zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) 998da6c28aaSamw { 999da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); 1000da6c28aaSamw } 1001da6c28aaSamw 1002da6c28aaSamw int 1003da6c28aaSamw zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) 1004da6c28aaSamw { 1005da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, smb_only)); 1006da6c28aaSamw } 1007da6c28aaSamw 1008fa9e4066Sahrens /* 1009da6c28aaSamw * Same as zfs_unmountall(), but for NFS and SMB unshares. 1010fa9e4066Sahrens */ 1011fa9e4066Sahrens int 1012da6c28aaSamw zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 1013fa9e4066Sahrens { 1014fa9e4066Sahrens prop_changelist_t *clp; 1015fa9e4066Sahrens int ret; 1016fa9e4066Sahrens 10170069fd67STim Haley clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); 1018fa9e4066Sahrens if (clp == NULL) 1019fa9e4066Sahrens return (-1); 1020fa9e4066Sahrens 1021da6c28aaSamw ret = changelist_unshare(clp, proto); 1022fa9e4066Sahrens changelist_free(clp); 1023fa9e4066Sahrens 1024fa9e4066Sahrens return (ret); 1025fa9e4066Sahrens } 1026fa9e4066Sahrens 1027da6c28aaSamw int 1028da6c28aaSamw zfs_unshareall_nfs(zfs_handle_t *zhp) 1029da6c28aaSamw { 1030da6c28aaSamw return (zfs_unshareall_proto(zhp, nfs_only)); 1031da6c28aaSamw } 1032da6c28aaSamw 1033da6c28aaSamw int 1034da6c28aaSamw zfs_unshareall_smb(zfs_handle_t *zhp) 1035da6c28aaSamw { 1036da6c28aaSamw return (zfs_unshareall_proto(zhp, smb_only)); 1037da6c28aaSamw } 1038da6c28aaSamw 1039da6c28aaSamw int 1040da6c28aaSamw zfs_unshareall(zfs_handle_t *zhp) 1041da6c28aaSamw { 1042da6c28aaSamw return (zfs_unshareall_proto(zhp, share_all_proto)); 1043da6c28aaSamw } 1044da6c28aaSamw 1045da6c28aaSamw int 1046da6c28aaSamw zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) 1047da6c28aaSamw { 1048da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); 1049da6c28aaSamw } 1050da6c28aaSamw 1051fa9e4066Sahrens /* 1052fa9e4066Sahrens * Remove the mountpoint associated with the current dataset, if necessary. 1053fa9e4066Sahrens * We only remove the underlying directory if: 1054fa9e4066Sahrens * 1055fa9e4066Sahrens * - The mountpoint is not 'none' or 'legacy' 1056fa9e4066Sahrens * - The mountpoint is non-empty 1057fa9e4066Sahrens * - The mountpoint is the default or inherited 1058fa9e4066Sahrens * - The 'zoned' property is set, or we're in a local zone 1059fa9e4066Sahrens * 1060fa9e4066Sahrens * Any other directories we leave alone. 1061fa9e4066Sahrens */ 1062fa9e4066Sahrens void 1063fa9e4066Sahrens remove_mountpoint(zfs_handle_t *zhp) 1064fa9e4066Sahrens { 1065fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 1066990b4856Slling zprop_source_t source; 1067fa9e4066Sahrens 1068e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), 1069e9dbad6fSeschrock &source)) 1070fa9e4066Sahrens return; 1071fa9e4066Sahrens 1072990b4856Slling if (source == ZPROP_SRC_DEFAULT || 1073990b4856Slling source == ZPROP_SRC_INHERITED) { 1074fa9e4066Sahrens /* 1075fa9e4066Sahrens * Try to remove the directory, silently ignoring any errors. 1076fa9e4066Sahrens * The filesystem may have since been removed or moved around, 1077e9dbad6fSeschrock * and this error isn't really useful to the administrator in 1078e9dbad6fSeschrock * any way. 1079fa9e4066Sahrens */ 1080fa9e4066Sahrens (void) rmdir(mountpoint); 1081fa9e4066Sahrens } 1082fa9e4066Sahrens } 10833bb79becSeschrock 1084*591e0e13SSebastien Roy /* 1085*591e0e13SSebastien Roy * Add the given zfs handle to the cb_handles array, dynamically reallocating 1086*591e0e13SSebastien Roy * the array if it is out of space. 1087*591e0e13SSebastien Roy */ 10889d9a58e3SEric Taylor void 10899d9a58e3SEric Taylor libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp) 10909d9a58e3SEric Taylor { 10919d9a58e3SEric Taylor if (cbp->cb_alloc == cbp->cb_used) { 10929d9a58e3SEric Taylor size_t newsz; 1093*591e0e13SSebastien Roy zfs_handle_t **newhandles; 10949d9a58e3SEric Taylor 1095*591e0e13SSebastien Roy newsz = cbp->cb_alloc != 0 ? cbp->cb_alloc * 2 : 64; 1096*591e0e13SSebastien Roy newhandles = zfs_realloc(zhp->zfs_hdl, 1097*591e0e13SSebastien Roy cbp->cb_handles, cbp->cb_alloc * sizeof (zfs_handle_t *), 1098*591e0e13SSebastien Roy newsz * sizeof (zfs_handle_t *)); 1099*591e0e13SSebastien Roy cbp->cb_handles = newhandles; 11009d9a58e3SEric Taylor cbp->cb_alloc = newsz; 11019d9a58e3SEric Taylor } 11029d9a58e3SEric Taylor cbp->cb_handles[cbp->cb_used++] = zhp; 11039d9a58e3SEric Taylor } 11043bb79becSeschrock 1105*591e0e13SSebastien Roy /* 1106*591e0e13SSebastien Roy * Recursive helper function used during file system enumeration 1107*591e0e13SSebastien Roy */ 11083bb79becSeschrock static int 1109*591e0e13SSebastien Roy zfs_iter_cb(zfs_handle_t *zhp, void *data) 11103bb79becSeschrock { 11119d9a58e3SEric Taylor get_all_cb_t *cbp = data; 11123bb79becSeschrock 11139d9a58e3SEric Taylor if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) { 11143bb79becSeschrock zfs_close(zhp); 11153bb79becSeschrock return (0); 11163bb79becSeschrock } 11173bb79becSeschrock 1118a227b7f4Shs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { 1119a227b7f4Shs zfs_close(zhp); 1120a227b7f4Shs return (0); 1121a227b7f4Shs } 1122a227b7f4Shs 11239c3fd121SMatthew Ahrens /* 11249c3fd121SMatthew Ahrens * If this filesystem is inconsistent and has a receive resume 11259c3fd121SMatthew Ahrens * token, we can not mount it. 11269c3fd121SMatthew Ahrens */ 11279c3fd121SMatthew Ahrens if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) && 11289c3fd121SMatthew Ahrens zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN, 11299c3fd121SMatthew Ahrens NULL, 0, NULL, NULL, 0, B_TRUE) == 0) { 11309c3fd121SMatthew Ahrens zfs_close(zhp); 11319c3fd121SMatthew Ahrens return (0); 11329c3fd121SMatthew Ahrens } 11339c3fd121SMatthew Ahrens 11349d9a58e3SEric Taylor libzfs_add_handle(cbp, zhp); 1135*591e0e13SSebastien Roy if (zfs_iter_filesystems(zhp, zfs_iter_cb, cbp) != 0) { 11369d9a58e3SEric Taylor zfs_close(zhp); 11379d9a58e3SEric Taylor return (-1); 11383bb79becSeschrock } 11399d9a58e3SEric Taylor return (0); 11403bb79becSeschrock } 11413bb79becSeschrock 1142*591e0e13SSebastien Roy /* 1143*591e0e13SSebastien Roy * Sort comparator that compares two mountpoint paths. We sort these paths so 1144*591e0e13SSebastien Roy * that subdirectories immediately follow their parents. This means that we 1145*591e0e13SSebastien Roy * effectively treat the '/' character as the lowest value non-nul char. An 1146*591e0e13SSebastien Roy * example sorted list using this comparator would look like: 1147*591e0e13SSebastien Roy * 1148*591e0e13SSebastien Roy * /foo 1149*591e0e13SSebastien Roy * /foo/bar 1150*591e0e13SSebastien Roy * /foo/bar/baz 1151*591e0e13SSebastien Roy * /foo/baz 1152*591e0e13SSebastien Roy * /foo.bar 1153*591e0e13SSebastien Roy * 1154*591e0e13SSebastien Roy * The mounting code depends on this ordering to deterministically iterate 1155*591e0e13SSebastien Roy * over filesystems in order to spawn parallel mount tasks. 1156*591e0e13SSebastien Roy */ 11579d9a58e3SEric Taylor int 1158*591e0e13SSebastien Roy mountpoint_cmp(const void *arga, const void *argb) 11593bb79becSeschrock { 1160*591e0e13SSebastien Roy zfs_handle_t *const *zap = arga; 1161*591e0e13SSebastien Roy zfs_handle_t *za = *zap; 1162*591e0e13SSebastien Roy zfs_handle_t *const *zbp = argb; 1163*591e0e13SSebastien Roy zfs_handle_t *zb = *zbp; 11643bb79becSeschrock char mounta[MAXPATHLEN]; 11653bb79becSeschrock char mountb[MAXPATHLEN]; 1166*591e0e13SSebastien Roy const char *a = mounta; 1167*591e0e13SSebastien Roy const char *b = mountb; 1168f3861e1aSahl boolean_t gota, gotb; 1169f3861e1aSahl 1170*591e0e13SSebastien Roy gota = (zfs_get_type(za) == ZFS_TYPE_FILESYSTEM); 1171*591e0e13SSebastien Roy if (gota) { 1172*591e0e13SSebastien Roy verify(zfs_prop_get(za, ZFS_PROP_MOUNTPOINT, mounta, 1173f3861e1aSahl sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 1174*591e0e13SSebastien Roy } 1175*591e0e13SSebastien Roy gotb = (zfs_get_type(zb) == ZFS_TYPE_FILESYSTEM); 1176*591e0e13SSebastien Roy if (gotb) { 1177*591e0e13SSebastien Roy verify(zfs_prop_get(zb, ZFS_PROP_MOUNTPOINT, mountb, 1178f3861e1aSahl sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 1179*591e0e13SSebastien Roy } 1180f3861e1aSahl 1181*591e0e13SSebastien Roy if (gota && gotb) { 1182*591e0e13SSebastien Roy while (*a != '\0' && (*a == *b)) { 1183*591e0e13SSebastien Roy a++; 1184*591e0e13SSebastien Roy b++; 1185*591e0e13SSebastien Roy } 1186*591e0e13SSebastien Roy if (*a == *b) 1187*591e0e13SSebastien Roy return (0); 1188*591e0e13SSebastien Roy if (*a == '\0') 1189*591e0e13SSebastien Roy return (-1); 1190*591e0e13SSebastien Roy if (*b == '\0') 1191*591e0e13SSebastien Roy return (1); 1192*591e0e13SSebastien Roy if (*a == '/') 1193*591e0e13SSebastien Roy return (-1); 1194*591e0e13SSebastien Roy if (*b == '/') 1195*591e0e13SSebastien Roy return (1); 1196*591e0e13SSebastien Roy return (*a < *b ? -1 : *a > *b); 1197*591e0e13SSebastien Roy } 11983bb79becSeschrock 1199f3861e1aSahl if (gota) 1200f3861e1aSahl return (-1); 1201f3861e1aSahl if (gotb) 1202f3861e1aSahl return (1); 12033bb79becSeschrock 1204*591e0e13SSebastien Roy /* 1205*591e0e13SSebastien Roy * If neither filesystem has a mountpoint, revert to sorting by 1206*591e0e13SSebastien Roy * dataset name. 1207*591e0e13SSebastien Roy */ 1208*591e0e13SSebastien Roy return (strcmp(zfs_get_name(za), zfs_get_name(zb))); 1209*591e0e13SSebastien Roy } 1210*591e0e13SSebastien Roy 1211*591e0e13SSebastien Roy /* 1212*591e0e13SSebastien Roy * Return true if path2 is a child of path1. 1213*591e0e13SSebastien Roy */ 1214*591e0e13SSebastien Roy static boolean_t 1215*591e0e13SSebastien Roy libzfs_path_contains(const char *path1, const char *path2) 1216*591e0e13SSebastien Roy { 1217*591e0e13SSebastien Roy return (strstr(path2, path1) == path2 && path2[strlen(path1)] == '/'); 1218*591e0e13SSebastien Roy } 1219*591e0e13SSebastien Roy 1220*591e0e13SSebastien Roy /* 1221*591e0e13SSebastien Roy * Given a mountpoint specified by idx in the handles array, find the first 1222*591e0e13SSebastien Roy * non-descendent of that mountpoint and return its index. Descendant paths 1223*591e0e13SSebastien Roy * start with the parent's path. This function relies on the ordering 1224*591e0e13SSebastien Roy * enforced by mountpoint_cmp(). 1225*591e0e13SSebastien Roy */ 1226*591e0e13SSebastien Roy static int 1227*591e0e13SSebastien Roy non_descendant_idx(zfs_handle_t **handles, size_t num_handles, int idx) 1228*591e0e13SSebastien Roy { 1229*591e0e13SSebastien Roy char parent[ZFS_MAXPROPLEN]; 1230*591e0e13SSebastien Roy char child[ZFS_MAXPROPLEN]; 1231*591e0e13SSebastien Roy int i; 1232*591e0e13SSebastien Roy 1233*591e0e13SSebastien Roy verify(zfs_prop_get(handles[idx], ZFS_PROP_MOUNTPOINT, parent, 1234*591e0e13SSebastien Roy sizeof (parent), NULL, NULL, 0, B_FALSE) == 0); 1235*591e0e13SSebastien Roy 1236*591e0e13SSebastien Roy for (i = idx + 1; i < num_handles; i++) { 1237*591e0e13SSebastien Roy verify(zfs_prop_get(handles[i], ZFS_PROP_MOUNTPOINT, child, 1238*591e0e13SSebastien Roy sizeof (child), NULL, NULL, 0, B_FALSE) == 0); 1239*591e0e13SSebastien Roy if (!libzfs_path_contains(parent, child)) 1240*591e0e13SSebastien Roy break; 1241*591e0e13SSebastien Roy } 1242*591e0e13SSebastien Roy return (i); 1243*591e0e13SSebastien Roy } 1244*591e0e13SSebastien Roy 1245*591e0e13SSebastien Roy typedef struct mnt_param { 1246*591e0e13SSebastien Roy libzfs_handle_t *mnt_hdl; 1247*591e0e13SSebastien Roy zfs_taskq_t *mnt_tq; 1248*591e0e13SSebastien Roy zfs_handle_t **mnt_zhps; /* filesystems to mount */ 1249*591e0e13SSebastien Roy size_t mnt_num_handles; 1250*591e0e13SSebastien Roy int mnt_idx; /* Index of selected entry to mount */ 1251*591e0e13SSebastien Roy zfs_iter_f mnt_func; 1252*591e0e13SSebastien Roy void *mnt_data; 1253*591e0e13SSebastien Roy } mnt_param_t; 1254*591e0e13SSebastien Roy 1255*591e0e13SSebastien Roy /* 1256*591e0e13SSebastien Roy * Allocate and populate the parameter struct for mount function, and 1257*591e0e13SSebastien Roy * schedule mounting of the entry selected by idx. 1258*591e0e13SSebastien Roy */ 1259*591e0e13SSebastien Roy static void 1260*591e0e13SSebastien Roy zfs_dispatch_mount(libzfs_handle_t *hdl, zfs_handle_t **handles, 1261*591e0e13SSebastien Roy size_t num_handles, int idx, zfs_iter_f func, void *data, zfs_taskq_t *tq) 1262*591e0e13SSebastien Roy { 1263*591e0e13SSebastien Roy mnt_param_t *mnt_param = zfs_alloc(hdl, sizeof (mnt_param_t)); 1264*591e0e13SSebastien Roy 1265*591e0e13SSebastien Roy mnt_param->mnt_hdl = hdl; 1266*591e0e13SSebastien Roy mnt_param->mnt_tq = tq; 1267*591e0e13SSebastien Roy mnt_param->mnt_zhps = handles; 1268*591e0e13SSebastien Roy mnt_param->mnt_num_handles = num_handles; 1269*591e0e13SSebastien Roy mnt_param->mnt_idx = idx; 1270*591e0e13SSebastien Roy mnt_param->mnt_func = func; 1271*591e0e13SSebastien Roy mnt_param->mnt_data = data; 1272*591e0e13SSebastien Roy 1273*591e0e13SSebastien Roy (void) zfs_taskq_dispatch(tq, zfs_mount_task, (void*)mnt_param, 1274*591e0e13SSebastien Roy ZFS_TQ_SLEEP); 1275*591e0e13SSebastien Roy } 1276*591e0e13SSebastien Roy 1277*591e0e13SSebastien Roy /* 1278*591e0e13SSebastien Roy * This is the structure used to keep state of mounting or sharing operations 1279*591e0e13SSebastien Roy * during a call to zpool_enable_datasets(). 1280*591e0e13SSebastien Roy */ 1281*591e0e13SSebastien Roy typedef struct mount_state { 1282*591e0e13SSebastien Roy /* 1283*591e0e13SSebastien Roy * ms_mntstatus is set to -1 if any mount fails. While multiple threads 1284*591e0e13SSebastien Roy * could update this variable concurrently, no synchronization is 1285*591e0e13SSebastien Roy * needed as it's only ever set to -1. 1286*591e0e13SSebastien Roy */ 1287*591e0e13SSebastien Roy int ms_mntstatus; 1288*591e0e13SSebastien Roy int ms_mntflags; 1289*591e0e13SSebastien Roy const char *ms_mntopts; 1290*591e0e13SSebastien Roy } mount_state_t; 1291*591e0e13SSebastien Roy 1292*591e0e13SSebastien Roy static int 1293*591e0e13SSebastien Roy zfs_mount_one(zfs_handle_t *zhp, void *arg) 1294*591e0e13SSebastien Roy { 1295*591e0e13SSebastien Roy mount_state_t *ms = arg; 1296*591e0e13SSebastien Roy int ret = 0; 1297*591e0e13SSebastien Roy 1298*591e0e13SSebastien Roy if (zfs_mount(zhp, ms->ms_mntopts, ms->ms_mntflags) != 0) 1299*591e0e13SSebastien Roy ret = ms->ms_mntstatus = -1; 1300*591e0e13SSebastien Roy return (ret); 1301*591e0e13SSebastien Roy } 1302*591e0e13SSebastien Roy 1303*591e0e13SSebastien Roy static int 1304*591e0e13SSebastien Roy zfs_share_one(zfs_handle_t *zhp, void *arg) 1305*591e0e13SSebastien Roy { 1306*591e0e13SSebastien Roy mount_state_t *ms = arg; 1307*591e0e13SSebastien Roy int ret = 0; 1308*591e0e13SSebastien Roy 1309*591e0e13SSebastien Roy if (zfs_share(zhp) != 0) 1310*591e0e13SSebastien Roy ret = ms->ms_mntstatus = -1; 1311*591e0e13SSebastien Roy return (ret); 1312*591e0e13SSebastien Roy } 1313*591e0e13SSebastien Roy 1314*591e0e13SSebastien Roy /* 1315*591e0e13SSebastien Roy * Task queue function to mount one file system. On completion, it finds and 1316*591e0e13SSebastien Roy * schedules its children to be mounted. This depends on the sorting done in 1317*591e0e13SSebastien Roy * zfs_foreach_mountpoint(). Note that the degenerate case (chain of entries 1318*591e0e13SSebastien Roy * each descending from the previous) will have no parallelism since we always 1319*591e0e13SSebastien Roy * have to wait for the parent to finish mounting before we can schedule 1320*591e0e13SSebastien Roy * its children. 1321*591e0e13SSebastien Roy */ 1322*591e0e13SSebastien Roy static void 1323*591e0e13SSebastien Roy zfs_mount_task(void *arg) 1324*591e0e13SSebastien Roy { 1325*591e0e13SSebastien Roy mnt_param_t *mp = arg; 1326*591e0e13SSebastien Roy int idx = mp->mnt_idx; 1327*591e0e13SSebastien Roy zfs_handle_t **handles = mp->mnt_zhps; 1328*591e0e13SSebastien Roy size_t num_handles = mp->mnt_num_handles; 1329*591e0e13SSebastien Roy char mountpoint[ZFS_MAXPROPLEN]; 1330*591e0e13SSebastien Roy 1331*591e0e13SSebastien Roy verify(zfs_prop_get(handles[idx], ZFS_PROP_MOUNTPOINT, mountpoint, 1332*591e0e13SSebastien Roy sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0); 1333*591e0e13SSebastien Roy 1334*591e0e13SSebastien Roy if (mp->mnt_func(handles[idx], mp->mnt_data) != 0) 1335*591e0e13SSebastien Roy return; 1336*591e0e13SSebastien Roy 1337*591e0e13SSebastien Roy /* 1338*591e0e13SSebastien Roy * We dispatch tasks to mount filesystems with mountpoints underneath 1339*591e0e13SSebastien Roy * this one. We do this by dispatching the next filesystem with a 1340*591e0e13SSebastien Roy * descendant mountpoint of the one we just mounted, then skip all of 1341*591e0e13SSebastien Roy * its descendants, dispatch the next descendant mountpoint, and so on. 1342*591e0e13SSebastien Roy * The non_descendant_idx() function skips over filesystems that are 1343*591e0e13SSebastien Roy * descendants of the filesystem we just dispatched. 1344*591e0e13SSebastien Roy */ 1345*591e0e13SSebastien Roy for (int i = idx + 1; i < num_handles; 1346*591e0e13SSebastien Roy i = non_descendant_idx(handles, num_handles, i)) { 1347*591e0e13SSebastien Roy char child[ZFS_MAXPROPLEN]; 1348*591e0e13SSebastien Roy verify(zfs_prop_get(handles[i], ZFS_PROP_MOUNTPOINT, 1349*591e0e13SSebastien Roy child, sizeof (child), NULL, NULL, 0, B_FALSE) == 0); 1350*591e0e13SSebastien Roy 1351*591e0e13SSebastien Roy if (!libzfs_path_contains(mountpoint, child)) 1352*591e0e13SSebastien Roy break; /* not a descendant, return */ 1353*591e0e13SSebastien Roy zfs_dispatch_mount(mp->mnt_hdl, handles, num_handles, i, 1354*591e0e13SSebastien Roy mp->mnt_func, mp->mnt_data, mp->mnt_tq); 1355*591e0e13SSebastien Roy } 1356*591e0e13SSebastien Roy free(mp); 1357*591e0e13SSebastien Roy } 1358*591e0e13SSebastien Roy 1359*591e0e13SSebastien Roy /* 1360*591e0e13SSebastien Roy * Issue the func callback for each ZFS handle contained in the handles 1361*591e0e13SSebastien Roy * array. This function is used to mount all datasets, and so this function 1362*591e0e13SSebastien Roy * guarantees that filesystems for parent mountpoints are called before their 1363*591e0e13SSebastien Roy * children. As such, before issuing any callbacks, we first sort the array 1364*591e0e13SSebastien Roy * of handles by mountpoint. 1365*591e0e13SSebastien Roy * 1366*591e0e13SSebastien Roy * Callbacks are issued in one of two ways: 1367*591e0e13SSebastien Roy * 1368*591e0e13SSebastien Roy * 1. Sequentially: If the parallel argument is B_FALSE or the ZFS_SERIAL_MOUNT 1369*591e0e13SSebastien Roy * environment variable is set, then we issue callbacks sequentially. 1370*591e0e13SSebastien Roy * 1371*591e0e13SSebastien Roy * 2. In parallel: If the parallel argument is B_TRUE and the ZFS_SERIAL_MOUNT 1372*591e0e13SSebastien Roy * environment variable is not set, then we use a taskq to dispatch threads 1373*591e0e13SSebastien Roy * to mount filesystems is parallel. This function dispatches tasks to mount 1374*591e0e13SSebastien Roy * the filesystems at the top-level mountpoints, and these tasks in turn 1375*591e0e13SSebastien Roy * are responsible for recursively mounting filesystems in their children 1376*591e0e13SSebastien Roy * mountpoints. 1377*591e0e13SSebastien Roy */ 1378*591e0e13SSebastien Roy void 1379*591e0e13SSebastien Roy zfs_foreach_mountpoint(libzfs_handle_t *hdl, zfs_handle_t **handles, 1380*591e0e13SSebastien Roy size_t num_handles, zfs_iter_f func, void *data, boolean_t parallel) 1381*591e0e13SSebastien Roy { 1382*591e0e13SSebastien Roy /* 1383*591e0e13SSebastien Roy * The ZFS_SERIAL_MOUNT environment variable is an undocumented 1384*591e0e13SSebastien Roy * variable that can be used as a convenience to do a/b comparison 1385*591e0e13SSebastien Roy * of serial vs. parallel mounting. 1386*591e0e13SSebastien Roy */ 1387*591e0e13SSebastien Roy boolean_t serial_mount = !parallel || 1388*591e0e13SSebastien Roy (getenv("ZFS_SERIAL_MOUNT") != NULL); 1389*591e0e13SSebastien Roy 1390*591e0e13SSebastien Roy /* 1391*591e0e13SSebastien Roy * Sort the datasets by mountpoint. See mountpoint_cmp for details 1392*591e0e13SSebastien Roy * of how these are sorted. 1393*591e0e13SSebastien Roy */ 1394*591e0e13SSebastien Roy qsort(handles, num_handles, sizeof (zfs_handle_t *), mountpoint_cmp); 1395*591e0e13SSebastien Roy 1396*591e0e13SSebastien Roy if (serial_mount) { 1397*591e0e13SSebastien Roy for (int i = 0; i < num_handles; i++) { 1398*591e0e13SSebastien Roy func(handles[i], data); 1399*591e0e13SSebastien Roy } 1400*591e0e13SSebastien Roy return; 1401*591e0e13SSebastien Roy } 1402*591e0e13SSebastien Roy 1403*591e0e13SSebastien Roy /* 1404*591e0e13SSebastien Roy * Issue the callback function for each dataset using a parallel 1405*591e0e13SSebastien Roy * algorithm that uses a taskq to manage threads. 1406*591e0e13SSebastien Roy */ 1407*591e0e13SSebastien Roy zfs_taskq_t *tq = zfs_taskq_create("mount_taskq", mount_tq_nthr, 0, 1408*591e0e13SSebastien Roy mount_tq_nthr, mount_tq_nthr, ZFS_TASKQ_PREPOPULATE); 1409*591e0e13SSebastien Roy 1410*591e0e13SSebastien Roy /* 1411*591e0e13SSebastien Roy * There may be multiple "top level" mountpoints outside of the pool's 1412*591e0e13SSebastien Roy * root mountpoint, e.g.: /foo /bar. Dispatch a mount task for each of 1413*591e0e13SSebastien Roy * these. 1414*591e0e13SSebastien Roy */ 1415*591e0e13SSebastien Roy for (int i = 0; i < num_handles; 1416*591e0e13SSebastien Roy i = non_descendant_idx(handles, num_handles, i)) { 1417*591e0e13SSebastien Roy zfs_dispatch_mount(hdl, handles, num_handles, i, func, data, 1418*591e0e13SSebastien Roy tq); 1419*591e0e13SSebastien Roy } 1420*591e0e13SSebastien Roy 1421*591e0e13SSebastien Roy zfs_taskq_wait(tq); /* wait for all scheduled mounts to complete */ 1422*591e0e13SSebastien Roy zfs_taskq_destroy(tq); 14233bb79becSeschrock } 14243bb79becSeschrock 1425f3861e1aSahl /* 1426f3861e1aSahl * Mount and share all datasets within the given pool. This assumes that no 1427*591e0e13SSebastien Roy * datasets within the pool are currently mounted. 1428f3861e1aSahl */ 1429f3861e1aSahl #pragma weak zpool_mount_datasets = zpool_enable_datasets 14303bb79becSeschrock int 1431f3861e1aSahl zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) 14323bb79becSeschrock { 14339d9a58e3SEric Taylor get_all_cb_t cb = { 0 }; 1434*591e0e13SSebastien Roy mount_state_t ms = { 0 }; 14353bb79becSeschrock zfs_handle_t *zfsp; 1436*591e0e13SSebastien Roy sa_init_selective_arg_t sharearg; 1437*591e0e13SSebastien Roy int ret = 0; 14383bb79becSeschrock 1439*591e0e13SSebastien Roy if ((zfsp = zfs_open(zhp->zpool_hdl, zhp->zpool_name, 1440*591e0e13SSebastien Roy ZFS_TYPE_DATASET)) == NULL) 14413bb79becSeschrock goto out; 14423bb79becSeschrock 14433bb79becSeschrock 14443bb79becSeschrock /* 1445*591e0e13SSebastien Roy * Gather all non-snapshot datasets within the pool. Start by adding 1446*591e0e13SSebastien Roy * the root filesystem for this pool to the list, and then iterate 1447*591e0e13SSebastien Roy * over all child filesystems. 14483bb79becSeschrock */ 1449*591e0e13SSebastien Roy libzfs_add_handle(&cb, zfsp); 1450*591e0e13SSebastien Roy if (zfs_iter_filesystems(zfsp, zfs_iter_cb, &cb) != 0) 14516e77af0aSDavid Pacheco goto out; 14526e77af0aSDavid Pacheco 1453*591e0e13SSebastien Roy ms.ms_mntopts = mntopts; 1454*591e0e13SSebastien Roy ms.ms_mntflags = flags; 1455*591e0e13SSebastien Roy zfs_foreach_mountpoint(zhp->zpool_hdl, cb.cb_handles, cb.cb_used, 1456*591e0e13SSebastien Roy zfs_mount_one, &ms, B_TRUE); 1457*591e0e13SSebastien Roy if (ms.ms_mntstatus != 0) 1458*591e0e13SSebastien Roy ret = ms.ms_mntstatus; 14595b6e0c46Sdougm 146067331909Sdougm /* 1461*591e0e13SSebastien Roy * Share all filesystems that need to be shared. This needs to be 1462*591e0e13SSebastien Roy * a separate pass because libshare is not mt-safe, and so we need 1463*591e0e13SSebastien Roy * to share serially. 146467331909Sdougm */ 1465*591e0e13SSebastien Roy sharearg.zhandle_arr = cb.cb_handles; 1466*591e0e13SSebastien Roy sharearg.zhandle_len = cb.cb_used; 1467*591e0e13SSebastien Roy if ((ret = zfs_init_libshare_arg(zhp->zpool_hdl, 1468*591e0e13SSebastien Roy SA_INIT_SHARE_API_SELECTIVE, &sharearg)) != 0) 1469*591e0e13SSebastien Roy goto out; 147067331909Sdougm 1471*591e0e13SSebastien Roy ms.ms_mntstatus = 0; 1472*591e0e13SSebastien Roy zfs_foreach_mountpoint(zhp->zpool_hdl, cb.cb_handles, cb.cb_used, 1473*591e0e13SSebastien Roy zfs_share_one, &ms, B_FALSE); 1474*591e0e13SSebastien Roy if (ms.ms_mntstatus != 0) 1475*591e0e13SSebastien Roy ret = ms.ms_mntstatus; 14763bb79becSeschrock 14773bb79becSeschrock out: 1478*591e0e13SSebastien Roy for (int i = 0; i < cb.cb_used; i++) 14799d9a58e3SEric Taylor zfs_close(cb.cb_handles[i]); 14809d9a58e3SEric Taylor free(cb.cb_handles); 14813bb79becSeschrock 14823bb79becSeschrock return (ret); 14833bb79becSeschrock } 14843bb79becSeschrock 14853bb79becSeschrock static int 14863bb79becSeschrock mountpoint_compare(const void *a, const void *b) 14873bb79becSeschrock { 14883bb79becSeschrock const char *mounta = *((char **)a); 14893bb79becSeschrock const char *mountb = *((char **)b); 14903bb79becSeschrock 14913bb79becSeschrock return (strcmp(mountb, mounta)); 14923bb79becSeschrock } 14933bb79becSeschrock 1494681d9761SEric Taylor /* alias for 2002/240 */ 1495681d9761SEric Taylor #pragma weak zpool_unmount_datasets = zpool_disable_datasets 1496f3861e1aSahl /* 1497f3861e1aSahl * Unshare and unmount all datasets within the given pool. We don't want to 1498f3861e1aSahl * rely on traversing the DSL to discover the filesystems within the pool, 1499f3861e1aSahl * because this may be expensive (if not all of them are mounted), and can fail 1500f3861e1aSahl * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and 1501f3861e1aSahl * gather all the filesystems that are currently mounted. 1502f3861e1aSahl */ 15033bb79becSeschrock int 1504f3861e1aSahl zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) 15053bb79becSeschrock { 15063bb79becSeschrock int used, alloc; 15073bb79becSeschrock struct mnttab entry; 15083bb79becSeschrock size_t namelen; 15093bb79becSeschrock char **mountpoints = NULL; 15103bb79becSeschrock zfs_handle_t **datasets = NULL; 15113bb79becSeschrock libzfs_handle_t *hdl = zhp->zpool_hdl; 15123bb79becSeschrock int i; 15133bb79becSeschrock int ret = -1; 15143bb79becSeschrock int flags = (force ? MS_FORCE : 0); 15158a981c33SDaniel Hoffman sa_init_selective_arg_t sharearg; 15163bb79becSeschrock 15173bb79becSeschrock namelen = strlen(zhp->zpool_name); 15183bb79becSeschrock 15193bb79becSeschrock rewind(hdl->libzfs_mnttab); 15203bb79becSeschrock used = alloc = 0; 15213bb79becSeschrock while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 15223bb79becSeschrock /* 15233bb79becSeschrock * Ignore non-ZFS entries. 15243bb79becSeschrock */ 15253bb79becSeschrock if (entry.mnt_fstype == NULL || 15263bb79becSeschrock strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 15273bb79becSeschrock continue; 15283bb79becSeschrock 15293bb79becSeschrock /* 15303bb79becSeschrock * Ignore filesystems not within this pool. 15313bb79becSeschrock */ 15323bb79becSeschrock if (entry.mnt_mountp == NULL || 15333bb79becSeschrock strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || 15343bb79becSeschrock (entry.mnt_special[namelen] != '/' && 15353bb79becSeschrock entry.mnt_special[namelen] != '\0')) 15363bb79becSeschrock continue; 15373bb79becSeschrock 15383bb79becSeschrock /* 15393bb79becSeschrock * At this point we've found a filesystem within our pool. Add 15403bb79becSeschrock * it to our growing list. 15413bb79becSeschrock */ 15423bb79becSeschrock if (used == alloc) { 15433bb79becSeschrock if (alloc == 0) { 15443bb79becSeschrock if ((mountpoints = zfs_alloc(hdl, 15453bb79becSeschrock 8 * sizeof (void *))) == NULL) 15463bb79becSeschrock goto out; 15473bb79becSeschrock 15483bb79becSeschrock if ((datasets = zfs_alloc(hdl, 15493bb79becSeschrock 8 * sizeof (void *))) == NULL) 15503bb79becSeschrock goto out; 15513bb79becSeschrock 15523bb79becSeschrock alloc = 8; 15533bb79becSeschrock } else { 1554e9dbad6fSeschrock void *ptr; 15553bb79becSeschrock 1556e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, mountpoints, 1557e9dbad6fSeschrock alloc * sizeof (void *), 15583bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 15593bb79becSeschrock goto out; 1560e9dbad6fSeschrock mountpoints = ptr; 15613bb79becSeschrock 1562e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, datasets, 1563e9dbad6fSeschrock alloc * sizeof (void *), 15643bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 15653bb79becSeschrock goto out; 1566e9dbad6fSeschrock datasets = ptr; 15673bb79becSeschrock 15683bb79becSeschrock alloc *= 2; 15693bb79becSeschrock } 15703bb79becSeschrock } 15713bb79becSeschrock 15723bb79becSeschrock if ((mountpoints[used] = zfs_strdup(hdl, 15733bb79becSeschrock entry.mnt_mountp)) == NULL) 15743bb79becSeschrock goto out; 15753bb79becSeschrock 15763bb79becSeschrock /* 15773bb79becSeschrock * This is allowed to fail, in case there is some I/O error. It 15783bb79becSeschrock * is only used to determine if we need to remove the underlying 15793bb79becSeschrock * mountpoint, so failure is not fatal. 15803bb79becSeschrock */ 15813bb79becSeschrock datasets[used] = make_dataset_handle(hdl, entry.mnt_special); 15823bb79becSeschrock 15833bb79becSeschrock used++; 15843bb79becSeschrock } 15853bb79becSeschrock 15863bb79becSeschrock /* 15873bb79becSeschrock * At this point, we have the entire list of filesystems, so sort it by 15883bb79becSeschrock * mountpoint. 15893bb79becSeschrock */ 15908a981c33SDaniel Hoffman sharearg.zhandle_arr = datasets; 15918a981c33SDaniel Hoffman sharearg.zhandle_len = used; 15928a981c33SDaniel Hoffman ret = zfs_init_libshare_arg(hdl, SA_INIT_SHARE_API_SELECTIVE, 15938a981c33SDaniel Hoffman &sharearg); 15948a981c33SDaniel Hoffman if (ret != 0) 15958a981c33SDaniel Hoffman goto out; 15963bb79becSeschrock qsort(mountpoints, used, sizeof (char *), mountpoint_compare); 15973bb79becSeschrock 15983bb79becSeschrock /* 15993bb79becSeschrock * Walk through and first unshare everything. 16003bb79becSeschrock */ 16013bb79becSeschrock for (i = 0; i < used; i++) { 1602da6c28aaSamw zfs_share_proto_t *curr_proto; 1603da6c28aaSamw for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 1604da6c28aaSamw curr_proto++) { 1605da6c28aaSamw if (is_shared(hdl, mountpoints[i], *curr_proto) && 1606da6c28aaSamw unshare_one(hdl, mountpoints[i], 1607da6c28aaSamw mountpoints[i], *curr_proto) != 0) 1608da6c28aaSamw goto out; 1609da6c28aaSamw } 16103bb79becSeschrock } 16113bb79becSeschrock 16123bb79becSeschrock /* 16133bb79becSeschrock * Now unmount everything, removing the underlying directories as 16143bb79becSeschrock * appropriate. 16153bb79becSeschrock */ 16163bb79becSeschrock for (i = 0; i < used; i++) { 16173bb79becSeschrock if (unmount_one(hdl, mountpoints[i], flags) != 0) 16183bb79becSeschrock goto out; 1619e9dbad6fSeschrock } 16203bb79becSeschrock 1621e9dbad6fSeschrock for (i = 0; i < used; i++) { 16223bb79becSeschrock if (datasets[i]) 16233bb79becSeschrock remove_mountpoint(datasets[i]); 16243bb79becSeschrock } 16253bb79becSeschrock 16263bb79becSeschrock ret = 0; 16273bb79becSeschrock out: 16283bb79becSeschrock for (i = 0; i < used; i++) { 16293bb79becSeschrock if (datasets[i]) 16303bb79becSeschrock zfs_close(datasets[i]); 16313bb79becSeschrock free(mountpoints[i]); 16323bb79becSeschrock } 16333bb79becSeschrock free(datasets); 16343bb79becSeschrock free(mountpoints); 16353bb79becSeschrock 16363bb79becSeschrock return (ret); 16373bb79becSeschrock } 1638