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. 2509c9e6dcSChris Williamson * Copyright (c) 2014, 2016 by Delphix. All rights reserved. 2688f61deeSIgor Kozhukhov * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 27fa9e4066Sahrens */ 28fa9e4066Sahrens 29fa9e4066Sahrens /* 30fa9e4066Sahrens * Routines to manage ZFS mounts. We separate all the nasty routines that have 31f3861e1aSahl * to deal with the OS. The following functions are the main entry points -- 32f3861e1aSahl * they are used by mount and unmount and when changing a filesystem's 33f3861e1aSahl * mountpoint. 34fa9e4066Sahrens * 35fa9e4066Sahrens * zfs_is_mounted() 36fa9e4066Sahrens * zfs_mount() 37fa9e4066Sahrens * zfs_unmount() 38fa9e4066Sahrens * zfs_unmountall() 39fa9e4066Sahrens * 40f3861e1aSahl * This file also contains the functions used to manage sharing filesystems via 41f3861e1aSahl * NFS and iSCSI: 42fa9e4066Sahrens * 43fa9e4066Sahrens * zfs_is_shared() 44fa9e4066Sahrens * zfs_share() 45fa9e4066Sahrens * zfs_unshare() 46f3861e1aSahl * 47f3861e1aSahl * zfs_is_shared_nfs() 48da6c28aaSamw * zfs_is_shared_smb() 49da6c28aaSamw * zfs_share_proto() 50da6c28aaSamw * zfs_shareall(); 51da6c28aaSamw * zfs_unshare_nfs() 52da6c28aaSamw * zfs_unshare_smb() 53da6c28aaSamw * zfs_unshareall_nfs() 54da6c28aaSamw * zfs_unshareall_smb() 55da6c28aaSamw * zfs_unshareall() 56da6c28aaSamw * zfs_unshareall_bypath() 573bb79becSeschrock * 583bb79becSeschrock * The following functions are available for pool consumers, and will 59f3861e1aSahl * mount/unmount and share/unshare all datasets within pool: 603bb79becSeschrock * 61f3861e1aSahl * zpool_enable_datasets() 62f3861e1aSahl * zpool_disable_datasets() 63fa9e4066Sahrens */ 64fa9e4066Sahrens 65fa9e4066Sahrens #include <dirent.h> 66d8d59944Sahl #include <dlfcn.h> 67fa9e4066Sahrens #include <errno.h> 68d420209dSAlex Reece #include <fcntl.h> 69fa9e4066Sahrens #include <libgen.h> 70fa9e4066Sahrens #include <libintl.h> 71fa9e4066Sahrens #include <stdio.h> 72fa9e4066Sahrens #include <stdlib.h> 73fa9e4066Sahrens #include <strings.h> 74fa9e4066Sahrens #include <unistd.h> 75fa9e4066Sahrens #include <zone.h> 76fa9e4066Sahrens #include <sys/mntent.h> 77fa9e4066Sahrens #include <sys/mount.h> 78fa9e4066Sahrens #include <sys/stat.h> 79873c4903SPrakash Surya #include <sys/statvfs.h> 80fa9e4066Sahrens 81fa9e4066Sahrens #include <libzfs.h> 82fa9e4066Sahrens 83fa9e4066Sahrens #include "libzfs_impl.h" 84fa9e4066Sahrens 8567331909Sdougm #include <libshare.h> 8667331909Sdougm #include <sys/systeminfo.h> 8767331909Sdougm #define MAXISALEN 257 /* based on sysinfo(2) man page */ 8867331909Sdougm 89da6c28aaSamw static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); 90da6c28aaSamw zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, 91da6c28aaSamw zfs_share_proto_t); 92da6c28aaSamw 93da6c28aaSamw /* 94da6c28aaSamw * The share protocols table must be in the same order as the zfs_share_prot_t 95da6c28aaSamw * enum in libzfs_impl.h 96da6c28aaSamw */ 97da6c28aaSamw typedef struct { 98da6c28aaSamw zfs_prop_t p_prop; 99da6c28aaSamw char *p_name; 100da6c28aaSamw int p_share_err; 101da6c28aaSamw int p_unshare_err; 102da6c28aaSamw } proto_table_t; 103da6c28aaSamw 104da6c28aaSamw proto_table_t proto_table[PROTO_END] = { 105da6c28aaSamw {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, 106da6c28aaSamw {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, 107da6c28aaSamw }; 108da6c28aaSamw 109da6c28aaSamw zfs_share_proto_t nfs_only[] = { 110da6c28aaSamw PROTO_NFS, 111da6c28aaSamw PROTO_END 112da6c28aaSamw }; 113da6c28aaSamw 114da6c28aaSamw zfs_share_proto_t smb_only[] = { 115da6c28aaSamw PROTO_SMB, 116da6c28aaSamw PROTO_END 117da6c28aaSamw }; 118da6c28aaSamw zfs_share_proto_t share_all_proto[] = { 119da6c28aaSamw PROTO_NFS, 120da6c28aaSamw PROTO_SMB, 121da6c28aaSamw PROTO_END 122da6c28aaSamw }; 123da6c28aaSamw 124fa9e4066Sahrens /* 125da6c28aaSamw * Search the sharetab for the given mountpoint and protocol, returning 126da6c28aaSamw * a zfs_share_type_t value. 127fa9e4066Sahrens */ 128da6c28aaSamw static zfs_share_type_t 129da6c28aaSamw is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) 130fa9e4066Sahrens { 131fa9e4066Sahrens char buf[MAXPATHLEN], *tab; 132da6c28aaSamw char *ptr; 133fa9e4066Sahrens 13499653d4eSeschrock if (hdl->libzfs_sharetab == NULL) 135da6c28aaSamw return (SHARED_NOT_SHARED); 136fa9e4066Sahrens 13799653d4eSeschrock (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); 138fa9e4066Sahrens 13999653d4eSeschrock while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { 140fa9e4066Sahrens 141fa9e4066Sahrens /* the mountpoint is the first entry on each line */ 142da6c28aaSamw if ((tab = strchr(buf, '\t')) == NULL) 143da6c28aaSamw continue; 144da6c28aaSamw 145da6c28aaSamw *tab = '\0'; 146da6c28aaSamw if (strcmp(buf, mountpoint) == 0) { 147da6c28aaSamw /* 148da6c28aaSamw * the protocol field is the third field 149da6c28aaSamw * skip over second field 150da6c28aaSamw */ 151da6c28aaSamw ptr = ++tab; 152da6c28aaSamw if ((tab = strchr(ptr, '\t')) == NULL) 153da6c28aaSamw continue; 154da6c28aaSamw ptr = ++tab; 155da6c28aaSamw if ((tab = strchr(ptr, '\t')) == NULL) 156da6c28aaSamw continue; 157fa9e4066Sahrens *tab = '\0'; 158da6c28aaSamw if (strcmp(ptr, 159da6c28aaSamw proto_table[proto].p_name) == 0) { 160da6c28aaSamw switch (proto) { 161da6c28aaSamw case PROTO_NFS: 162da6c28aaSamw return (SHARED_NFS); 163da6c28aaSamw case PROTO_SMB: 164da6c28aaSamw return (SHARED_SMB); 165da6c28aaSamw default: 166da6c28aaSamw return (0); 167da6c28aaSamw } 168da6c28aaSamw } 169fa9e4066Sahrens } 170fa9e4066Sahrens } 171fa9e4066Sahrens 172da6c28aaSamw return (SHARED_NOT_SHARED); 173fa9e4066Sahrens } 174fa9e4066Sahrens 17599653d4eSeschrock static boolean_t 176873c4903SPrakash Surya dir_is_empty_stat(const char *dirname) 177873c4903SPrakash Surya { 178873c4903SPrakash Surya struct stat st; 179873c4903SPrakash Surya 180873c4903SPrakash Surya /* 181873c4903SPrakash Surya * We only want to return false if the given path is a non empty 182873c4903SPrakash Surya * directory, all other errors are handled elsewhere. 183873c4903SPrakash Surya */ 184873c4903SPrakash Surya if (stat(dirname, &st) < 0 || !S_ISDIR(st.st_mode)) { 185873c4903SPrakash Surya return (B_TRUE); 186873c4903SPrakash Surya } 187873c4903SPrakash Surya 188873c4903SPrakash Surya /* 189873c4903SPrakash Surya * An empty directory will still have two entries in it, one 190873c4903SPrakash Surya * entry for each of "." and "..". 191873c4903SPrakash Surya */ 192873c4903SPrakash Surya if (st.st_size > 2) { 193873c4903SPrakash Surya return (B_FALSE); 194873c4903SPrakash Surya } 195873c4903SPrakash Surya 196873c4903SPrakash Surya return (B_TRUE); 197873c4903SPrakash Surya } 198873c4903SPrakash Surya 199873c4903SPrakash Surya static boolean_t 200873c4903SPrakash Surya dir_is_empty_readdir(const char *dirname) 201fa9e4066Sahrens { 202fa9e4066Sahrens DIR *dirp; 203fa9e4066Sahrens struct dirent64 *dp; 204d420209dSAlex Reece int dirfd; 205fa9e4066Sahrens 206d420209dSAlex Reece if ((dirfd = openat(AT_FDCWD, dirname, 207d420209dSAlex Reece O_RDONLY | O_NDELAY | O_LARGEFILE | O_CLOEXEC, 0)) < 0) { 20899653d4eSeschrock return (B_TRUE); 209d420209dSAlex Reece } 210d420209dSAlex Reece 211d420209dSAlex Reece if ((dirp = fdopendir(dirfd)) == NULL) { 212d420209dSAlex Reece return (B_TRUE); 213d420209dSAlex Reece } 214fa9e4066Sahrens 215fa9e4066Sahrens while ((dp = readdir64(dirp)) != NULL) { 216fa9e4066Sahrens 217fa9e4066Sahrens if (strcmp(dp->d_name, ".") == 0 || 218fa9e4066Sahrens strcmp(dp->d_name, "..") == 0) 219fa9e4066Sahrens continue; 220fa9e4066Sahrens 221fa9e4066Sahrens (void) closedir(dirp); 22299653d4eSeschrock return (B_FALSE); 223fa9e4066Sahrens } 224fa9e4066Sahrens 225fa9e4066Sahrens (void) closedir(dirp); 22699653d4eSeschrock return (B_TRUE); 227fa9e4066Sahrens } 228fa9e4066Sahrens 229873c4903SPrakash Surya /* 230873c4903SPrakash Surya * Returns true if the specified directory is empty. If we can't open the 231873c4903SPrakash Surya * directory at all, return true so that the mount can fail with a more 232873c4903SPrakash Surya * informative error message. 233873c4903SPrakash Surya */ 234873c4903SPrakash Surya static boolean_t 235873c4903SPrakash Surya dir_is_empty(const char *dirname) 236873c4903SPrakash Surya { 237873c4903SPrakash Surya struct statvfs64 st; 238873c4903SPrakash Surya 239873c4903SPrakash Surya /* 240873c4903SPrakash Surya * If the statvfs call fails or the filesystem is not a ZFS 241873c4903SPrakash Surya * filesystem, fall back to the slow path which uses readdir. 242873c4903SPrakash Surya */ 243873c4903SPrakash Surya if ((statvfs64(dirname, &st) != 0) || 244873c4903SPrakash Surya (strcmp(st.f_basetype, "zfs") != 0)) { 245873c4903SPrakash Surya return (dir_is_empty_readdir(dirname)); 246873c4903SPrakash Surya } 247873c4903SPrakash Surya 248873c4903SPrakash Surya /* 249873c4903SPrakash Surya * At this point, we know the provided path is on a ZFS 250873c4903SPrakash Surya * filesystem, so we can use stat instead of readdir to 251873c4903SPrakash Surya * determine if the directory is empty or not. We try to avoid 252873c4903SPrakash Surya * using readdir because that requires opening "dirname"; this 253873c4903SPrakash Surya * open file descriptor can potentially end up in a child 254873c4903SPrakash Surya * process if there's a concurrent fork, thus preventing the 255873c4903SPrakash Surya * zfs_mount() from otherwise succeeding (the open file 256873c4903SPrakash Surya * descriptor inherited by the child process will cause the 257873c4903SPrakash Surya * parent's mount to fail with EBUSY). The performance 258873c4903SPrakash Surya * implications of replacing the open, read, and close with a 259873c4903SPrakash Surya * single stat is nice; but is not the main motivation for the 260873c4903SPrakash Surya * added complexity. 261873c4903SPrakash Surya */ 262873c4903SPrakash Surya return (dir_is_empty_stat(dirname)); 263873c4903SPrakash Surya } 264873c4903SPrakash Surya 265fa9e4066Sahrens /* 266fa9e4066Sahrens * Checks to see if the mount is active. If the filesystem is mounted, we fill 267fa9e4066Sahrens * in 'where' with the current mountpoint, and return 1. Otherwise, we return 268fa9e4066Sahrens * 0. 269fa9e4066Sahrens */ 27099653d4eSeschrock boolean_t 27155434c77Sek is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) 272fa9e4066Sahrens { 273ebedde84SEric Taylor struct mnttab entry; 274fa9e4066Sahrens 275ebedde84SEric Taylor if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) 27699653d4eSeschrock return (B_FALSE); 277fa9e4066Sahrens 278fa9e4066Sahrens if (where != NULL) 27955434c77Sek *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); 280fa9e4066Sahrens 28199653d4eSeschrock return (B_TRUE); 282fa9e4066Sahrens } 283fa9e4066Sahrens 28455434c77Sek boolean_t 28555434c77Sek zfs_is_mounted(zfs_handle_t *zhp, char **where) 28655434c77Sek { 28755434c77Sek return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); 28855434c77Sek } 28955434c77Sek 290e9dbad6fSeschrock /* 291e9dbad6fSeschrock * Returns true if the given dataset is mountable, false otherwise. Returns the 292e9dbad6fSeschrock * mountpoint in 'buf'. 293e9dbad6fSeschrock */ 294e9dbad6fSeschrock static boolean_t 295e9dbad6fSeschrock zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, 296990b4856Slling zprop_source_t *source) 297e9dbad6fSeschrock { 2989adfa60dSMatthew Ahrens char sourceloc[MAXNAMELEN]; 299990b4856Slling zprop_source_t sourcetype; 300e9dbad6fSeschrock 301e9dbad6fSeschrock if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) 302e9dbad6fSeschrock return (B_FALSE); 303e9dbad6fSeschrock 304e9dbad6fSeschrock verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, 305e9dbad6fSeschrock &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); 306e9dbad6fSeschrock 307e9dbad6fSeschrock if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || 308e9dbad6fSeschrock strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) 309e9dbad6fSeschrock return (B_FALSE); 310e9dbad6fSeschrock 311a227b7f4Shs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) 312e9dbad6fSeschrock return (B_FALSE); 313e9dbad6fSeschrock 314e9dbad6fSeschrock if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && 315e9dbad6fSeschrock getzoneid() == GLOBAL_ZONEID) 316e9dbad6fSeschrock return (B_FALSE); 317e9dbad6fSeschrock 318e9dbad6fSeschrock if (source) 319e9dbad6fSeschrock *source = sourcetype; 320e9dbad6fSeschrock 321e9dbad6fSeschrock return (B_TRUE); 322e9dbad6fSeschrock } 323e9dbad6fSeschrock 324fa9e4066Sahrens /* 325fa9e4066Sahrens * Mount the given filesystem. 326fa9e4066Sahrens */ 327fa9e4066Sahrens int 328fa9e4066Sahrens zfs_mount(zfs_handle_t *zhp, const char *options, int flags) 329fa9e4066Sahrens { 330fa9e4066Sahrens struct stat buf; 331fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 332fa9e4066Sahrens char mntopts[MNT_LINE_MAX]; 33399653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 334fa9e4066Sahrens 335fa9e4066Sahrens if (options == NULL) 336fa9e4066Sahrens mntopts[0] = '\0'; 337fa9e4066Sahrens else 338fa9e4066Sahrens (void) strlcpy(mntopts, options, sizeof (mntopts)); 339fa9e4066Sahrens 340f9af39baSGeorge Wilson /* 341f9af39baSGeorge Wilson * If the pool is imported read-only then all mounts must be read-only 342f9af39baSGeorge Wilson */ 343f9af39baSGeorge Wilson if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL)) 344f9af39baSGeorge Wilson flags |= MS_RDONLY; 345f9af39baSGeorge Wilson 346e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 34799653d4eSeschrock return (0); 348fa9e4066Sahrens 349fa9e4066Sahrens /* Create the directory if it doesn't already exist */ 350fa9e4066Sahrens if (lstat(mountpoint, &buf) != 0) { 351fa9e4066Sahrens if (mkdirp(mountpoint, 0755) != 0) { 35299653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 35399653d4eSeschrock "failed to create mountpoint")); 354ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 35599653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 35699653d4eSeschrock mountpoint)); 357fa9e4066Sahrens } 358fa9e4066Sahrens } 359fa9e4066Sahrens 360fa9e4066Sahrens /* 361fa9e4066Sahrens * Determine if the mountpoint is empty. If so, refuse to perform the 362fa9e4066Sahrens * mount. We don't perform this check if MS_OVERLAY is specified, which 363fa9e4066Sahrens * would defeat the point. We also avoid this check if 'remount' is 364fa9e4066Sahrens * specified. 365fa9e4066Sahrens */ 366fa9e4066Sahrens if ((flags & MS_OVERLAY) == 0 && 367fa9e4066Sahrens strstr(mntopts, MNTOPT_REMOUNT) == NULL && 368fa9e4066Sahrens !dir_is_empty(mountpoint)) { 36999653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 37099653d4eSeschrock "directory is not empty")); 371ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 37299653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); 373fa9e4066Sahrens } 374fa9e4066Sahrens 375fa9e4066Sahrens /* perform the mount */ 376fa9e4066Sahrens if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, 377fa9e4066Sahrens MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { 378fa9e4066Sahrens /* 379fa9e4066Sahrens * Generic errors are nasty, but there are just way too many 380fa9e4066Sahrens * from mount(), and they're well-understood. We pick a few 381fa9e4066Sahrens * common ones to improve upon. 382fa9e4066Sahrens */ 383d8689a57Sdougm if (errno == EBUSY) { 38499653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 38599653d4eSeschrock "mountpoint or dataset is busy")); 386ecd6cf80Smarks } else if (errno == EPERM) { 387ecd6cf80Smarks zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 388ecd6cf80Smarks "Insufficient privileges")); 38954a91118SChris Kirby } else if (errno == ENOTSUP) { 39054a91118SChris Kirby char buf[256]; 391dc7cd546SMark Shellenbaum int spa_version; 39254a91118SChris Kirby 393dc7cd546SMark Shellenbaum VERIFY(zfs_spa_version(zhp, &spa_version) == 0); 39454a91118SChris Kirby (void) snprintf(buf, sizeof (buf), 395dc7cd546SMark Shellenbaum dgettext(TEXT_DOMAIN, "Can't mount a version %lld " 396dc7cd546SMark Shellenbaum "file system on a version %d pool. Pool must be" 397dc7cd546SMark Shellenbaum " upgraded to mount this file system."), 39854a91118SChris Kirby (u_longlong_t)zfs_prop_get_int(zhp, 399dc7cd546SMark Shellenbaum ZFS_PROP_VERSION), spa_version); 40054a91118SChris Kirby zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); 401d8689a57Sdougm } else { 40299653d4eSeschrock zfs_error_aux(hdl, strerror(errno)); 403d8689a57Sdougm } 404ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 40599653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 40699653d4eSeschrock zhp->zfs_name)); 407fa9e4066Sahrens } 408fa9e4066Sahrens 409ebedde84SEric Taylor /* add the mounted entry into our cache */ 410ebedde84SEric Taylor libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, 411ebedde84SEric Taylor mntopts); 412fa9e4066Sahrens return (0); 413fa9e4066Sahrens } 414fa9e4066Sahrens 4153bb79becSeschrock /* 4163bb79becSeschrock * Unmount a single filesystem. 4173bb79becSeschrock */ 4183bb79becSeschrock static int 4193bb79becSeschrock unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) 4203bb79becSeschrock { 4213bb79becSeschrock if (umount2(mountpoint, flags) != 0) { 4223bb79becSeschrock zfs_error_aux(hdl, strerror(errno)); 423ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, 4243bb79becSeschrock dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), 4253bb79becSeschrock mountpoint)); 4263bb79becSeschrock } 4273bb79becSeschrock 4283bb79becSeschrock return (0); 4293bb79becSeschrock } 4303bb79becSeschrock 431fa9e4066Sahrens /* 432fa9e4066Sahrens * Unmount the given filesystem. 433fa9e4066Sahrens */ 434fa9e4066Sahrens int 435fa9e4066Sahrens zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) 436fa9e4066Sahrens { 437ebedde84SEric Taylor libzfs_handle_t *hdl = zhp->zfs_hdl; 438ebedde84SEric Taylor struct mnttab entry; 43967331909Sdougm char *mntpt = NULL; 440fa9e4066Sahrens 441ebedde84SEric Taylor /* check to see if we need to unmount the filesystem */ 442fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 443ebedde84SEric Taylor libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { 44467331909Sdougm /* 44567331909Sdougm * mountpoint may have come from a call to 44667331909Sdougm * getmnt/getmntany if it isn't NULL. If it is NULL, 447ebedde84SEric Taylor * we know it comes from libzfs_mnttab_find which can 448ebedde84SEric Taylor * then get freed later. We strdup it to play it safe. 44967331909Sdougm */ 450fa9e4066Sahrens if (mountpoint == NULL) 451ebedde84SEric Taylor mntpt = zfs_strdup(hdl, entry.mnt_mountp); 45267331909Sdougm else 453ebedde84SEric Taylor mntpt = zfs_strdup(hdl, mountpoint); 454fa9e4066Sahrens 455fa9e4066Sahrens /* 4563bb79becSeschrock * Unshare and unmount the filesystem 457fa9e4066Sahrens */ 458da6c28aaSamw if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) 459eb66cf86Sth return (-1); 460eb66cf86Sth 461ebedde84SEric Taylor if (unmount_one(hdl, mntpt, flags) != 0) { 46267331909Sdougm free(mntpt); 463da6c28aaSamw (void) zfs_shareall(zhp); 464fa9e4066Sahrens return (-1); 46567331909Sdougm } 466ebedde84SEric Taylor libzfs_mnttab_remove(hdl, zhp->zfs_name); 46767331909Sdougm free(mntpt); 468fa9e4066Sahrens } 469fa9e4066Sahrens 470fa9e4066Sahrens return (0); 471fa9e4066Sahrens } 472fa9e4066Sahrens 473fa9e4066Sahrens /* 474fa9e4066Sahrens * Unmount this filesystem and any children inheriting the mountpoint property. 475fa9e4066Sahrens * To do this, just act like we're changing the mountpoint property, but don't 476fa9e4066Sahrens * remount the filesystems afterwards. 477fa9e4066Sahrens */ 478fa9e4066Sahrens int 479fa9e4066Sahrens zfs_unmountall(zfs_handle_t *zhp, int flags) 480fa9e4066Sahrens { 481fa9e4066Sahrens prop_changelist_t *clp; 482fa9e4066Sahrens int ret; 483fa9e4066Sahrens 4840069fd67STim Haley clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); 485fa9e4066Sahrens if (clp == NULL) 486fa9e4066Sahrens return (-1); 487fa9e4066Sahrens 488fa9e4066Sahrens ret = changelist_prefix(clp); 489fa9e4066Sahrens changelist_free(clp); 490fa9e4066Sahrens 491fa9e4066Sahrens return (ret); 492fa9e4066Sahrens } 493fa9e4066Sahrens 494f3861e1aSahl boolean_t 495f3861e1aSahl zfs_is_shared(zfs_handle_t *zhp) 496f3861e1aSahl { 497da6c28aaSamw zfs_share_type_t rc = 0; 498da6c28aaSamw zfs_share_proto_t *curr_proto; 499da6c28aaSamw 500f3861e1aSahl if (ZFS_IS_VOLUME(zhp)) 501ab003da8SJim Dunham return (B_FALSE); 502f3861e1aSahl 503da6c28aaSamw for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 504da6c28aaSamw curr_proto++) 505da6c28aaSamw rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); 506da6c28aaSamw 507da6c28aaSamw return (rc ? B_TRUE : B_FALSE); 508f3861e1aSahl } 509f3861e1aSahl 510f3861e1aSahl int 511f3861e1aSahl zfs_share(zfs_handle_t *zhp) 512f3861e1aSahl { 5139d9a58e3SEric Taylor assert(!ZFS_IS_VOLUME(zhp)); 514da6c28aaSamw return (zfs_share_proto(zhp, share_all_proto)); 515f3861e1aSahl } 516f3861e1aSahl 517f3861e1aSahl int 518f3861e1aSahl zfs_unshare(zfs_handle_t *zhp) 519f3861e1aSahl { 5209d9a58e3SEric Taylor assert(!ZFS_IS_VOLUME(zhp)); 521da6c28aaSamw return (zfs_unshareall(zhp)); 522f3861e1aSahl } 523f3861e1aSahl 524fa9e4066Sahrens /* 525fa9e4066Sahrens * Check to see if the filesystem is currently shared. 526fa9e4066Sahrens */ 527da6c28aaSamw zfs_share_type_t 528da6c28aaSamw zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) 529fa9e4066Sahrens { 530fa9e4066Sahrens char *mountpoint; 531da6c28aaSamw zfs_share_type_t rc; 532fa9e4066Sahrens 533fa9e4066Sahrens if (!zfs_is_mounted(zhp, &mountpoint)) 534da6c28aaSamw return (SHARED_NOT_SHARED); 535fa9e4066Sahrens 53688f61deeSIgor Kozhukhov if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) 53788f61deeSIgor Kozhukhov != SHARED_NOT_SHARED) { 538fa9e4066Sahrens if (where != NULL) 539fa9e4066Sahrens *where = mountpoint; 540fa9e4066Sahrens else 541fa9e4066Sahrens free(mountpoint); 542da6c28aaSamw return (rc); 543fa9e4066Sahrens } else { 544fa9e4066Sahrens free(mountpoint); 545da6c28aaSamw return (SHARED_NOT_SHARED); 546fa9e4066Sahrens } 547fa9e4066Sahrens } 548fa9e4066Sahrens 549da6c28aaSamw boolean_t 550da6c28aaSamw zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) 551da6c28aaSamw { 552da6c28aaSamw return (zfs_is_shared_proto(zhp, where, 553da6c28aaSamw PROTO_NFS) != SHARED_NOT_SHARED); 554da6c28aaSamw } 555da6c28aaSamw 556da6c28aaSamw boolean_t 557da6c28aaSamw zfs_is_shared_smb(zfs_handle_t *zhp, char **where) 558da6c28aaSamw { 559da6c28aaSamw return (zfs_is_shared_proto(zhp, where, 560da6c28aaSamw PROTO_SMB) != SHARED_NOT_SHARED); 561da6c28aaSamw } 562da6c28aaSamw 56367331909Sdougm /* 56467331909Sdougm * Make sure things will work if libshare isn't installed by using 56567331909Sdougm * wrapper functions that check to see that the pointers to functions 56667331909Sdougm * initialized in _zfs_init_libshare() are actually present. 56767331909Sdougm */ 56867331909Sdougm 56967331909Sdougm static sa_handle_t (*_sa_init)(int); 570*8a981c33SDaniel Hoffman static sa_handle_t (*_sa_init_arg)(int, void *); 57167331909Sdougm static void (*_sa_fini)(sa_handle_t); 57267331909Sdougm static sa_share_t (*_sa_find_share)(sa_handle_t, char *); 57367331909Sdougm static int (*_sa_enable_share)(sa_share_t, char *); 57467331909Sdougm static int (*_sa_disable_share)(sa_share_t, char *); 57567331909Sdougm static char *(*_sa_errorstr)(int); 57667331909Sdougm static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); 5775b6e0c46Sdougm static boolean_t (*_sa_needs_refresh)(sa_handle_t *); 5785b6e0c46Sdougm static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); 5795b6e0c46Sdougm static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, 5805b6e0c46Sdougm char *, char *, zprop_source_t, char *, char *, char *); 5815b6e0c46Sdougm static void (*_sa_update_sharetab_ts)(sa_handle_t); 58267331909Sdougm 58367331909Sdougm /* 58467331909Sdougm * _zfs_init_libshare() 58567331909Sdougm * 58667331909Sdougm * Find the libshare.so.1 entry points that we use here and save the 58767331909Sdougm * values to be used later. This is triggered by the runtime loader. 58867331909Sdougm * Make sure the correct ISA version is loaded. 58967331909Sdougm */ 5905b6e0c46Sdougm 59167331909Sdougm #pragma init(_zfs_init_libshare) 59267331909Sdougm static void 59367331909Sdougm _zfs_init_libshare(void) 59467331909Sdougm { 59567331909Sdougm void *libshare; 59667331909Sdougm char path[MAXPATHLEN]; 59767331909Sdougm char isa[MAXISALEN]; 59867331909Sdougm 59967331909Sdougm #if defined(_LP64) 60067331909Sdougm if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) 601d8689a57Sdougm isa[0] = '\0'; 60267331909Sdougm #else 60367331909Sdougm isa[0] = '\0'; 60467331909Sdougm #endif 60567331909Sdougm (void) snprintf(path, MAXPATHLEN, 606d8689a57Sdougm "/usr/lib/%s/libshare.so.1", isa); 60767331909Sdougm 60867331909Sdougm if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { 609d8689a57Sdougm _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); 610*8a981c33SDaniel Hoffman _sa_init_arg = (sa_handle_t (*)(int, void *))dlsym(libshare, 611*8a981c33SDaniel Hoffman "sa_init_arg"); 612d8689a57Sdougm _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); 613d8689a57Sdougm _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) 614d8689a57Sdougm dlsym(libshare, "sa_find_share"); 615d8689a57Sdougm _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 616d8689a57Sdougm "sa_enable_share"); 617d8689a57Sdougm _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 618d8689a57Sdougm "sa_disable_share"); 619d8689a57Sdougm _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); 620d8689a57Sdougm _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) 621d8689a57Sdougm dlsym(libshare, "sa_parse_legacy_options"); 6225b6e0c46Sdougm _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) 6235b6e0c46Sdougm dlsym(libshare, "sa_needs_refresh"); 6245b6e0c46Sdougm _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) 6255b6e0c46Sdougm dlsym(libshare, "sa_get_zfs_handle"); 6265b6e0c46Sdougm _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, 6275b6e0c46Sdougm sa_share_t, char *, char *, zprop_source_t, char *, 6285b6e0c46Sdougm char *, char *))dlsym(libshare, "sa_zfs_process_share"); 6295b6e0c46Sdougm _sa_update_sharetab_ts = (void (*)(sa_handle_t)) 6305b6e0c46Sdougm dlsym(libshare, "sa_update_sharetab_ts"); 631*8a981c33SDaniel Hoffman if (_sa_init == NULL || _sa_init_arg == NULL || 632*8a981c33SDaniel Hoffman _sa_fini == NULL || _sa_find_share == NULL || 633*8a981c33SDaniel Hoffman _sa_enable_share == NULL || _sa_disable_share == NULL || 634*8a981c33SDaniel Hoffman _sa_errorstr == NULL || _sa_parse_legacy_options == NULL || 6355b6e0c46Sdougm _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || 6365b6e0c46Sdougm _sa_zfs_process_share == NULL || 6375b6e0c46Sdougm _sa_update_sharetab_ts == NULL) { 63857b448deSdougm _sa_init = NULL; 639*8a981c33SDaniel Hoffman _sa_init_arg = NULL; 64057b448deSdougm _sa_fini = NULL; 64157b448deSdougm _sa_disable_share = NULL; 64257b448deSdougm _sa_enable_share = NULL; 64357b448deSdougm _sa_errorstr = NULL; 64457b448deSdougm _sa_parse_legacy_options = NULL; 64557b448deSdougm (void) dlclose(libshare); 6465b6e0c46Sdougm _sa_needs_refresh = NULL; 6475b6e0c46Sdougm _sa_get_zfs_handle = NULL; 6485b6e0c46Sdougm _sa_zfs_process_share = NULL; 6495b6e0c46Sdougm _sa_update_sharetab_ts = NULL; 65057b448deSdougm } 65167331909Sdougm } 65267331909Sdougm } 65367331909Sdougm 65467331909Sdougm /* 65567331909Sdougm * zfs_init_libshare(zhandle, service) 65667331909Sdougm * 65767331909Sdougm * Initialize the libshare API if it hasn't already been initialized. 65867331909Sdougm * In all cases it returns 0 if it succeeded and an error if not. The 65967331909Sdougm * service value is which part(s) of the API to initialize and is a 66067331909Sdougm * direct map to the libshare sa_init(service) interface. 66167331909Sdougm */ 662*8a981c33SDaniel Hoffman static int 663*8a981c33SDaniel Hoffman zfs_init_libshare_impl(libzfs_handle_t *zhandle, int service, void *arg) 66467331909Sdougm { 665d8689a57Sdougm if (_sa_init == NULL) 66609c9e6dcSChris Williamson return (SA_CONFIG_ERR); 667d8689a57Sdougm 66809c9e6dcSChris Williamson /* 66909c9e6dcSChris Williamson * Attempt to refresh libshare. This is necessary if there was a cache 67009c9e6dcSChris Williamson * miss for a new ZFS dataset that was just created, or if state of the 67109c9e6dcSChris Williamson * sharetab file has changed since libshare was last initialized. We 67209c9e6dcSChris Williamson * want to make sure so check timestamps to see if a different process 67309c9e6dcSChris Williamson * has updated any of the configuration. If there was some non-ZFS 67409c9e6dcSChris Williamson * change, we need to re-initialize the internal cache. 67509c9e6dcSChris Williamson */ 67609c9e6dcSChris Williamson if (_sa_needs_refresh != NULL && 67709c9e6dcSChris Williamson _sa_needs_refresh(zhandle->libzfs_sharehdl)) { 67809c9e6dcSChris Williamson zfs_uninit_libshare(zhandle); 679*8a981c33SDaniel Hoffman zhandle->libzfs_sharehdl = _sa_init_arg(service, arg); 6805b6e0c46Sdougm } 6815b6e0c46Sdougm 68209c9e6dcSChris Williamson if (zhandle && zhandle->libzfs_sharehdl == NULL) 683*8a981c33SDaniel Hoffman zhandle->libzfs_sharehdl = _sa_init_arg(service, arg); 684d8689a57Sdougm 68509c9e6dcSChris Williamson if (zhandle->libzfs_sharehdl == NULL) 68609c9e6dcSChris Williamson return (SA_NO_MEMORY); 687d8689a57Sdougm 68809c9e6dcSChris Williamson return (SA_OK); 68967331909Sdougm } 690*8a981c33SDaniel Hoffman int 691*8a981c33SDaniel Hoffman zfs_init_libshare(libzfs_handle_t *zhandle, int service) 692*8a981c33SDaniel Hoffman { 693*8a981c33SDaniel Hoffman return (zfs_init_libshare_impl(zhandle, service, NULL)); 694*8a981c33SDaniel Hoffman } 695*8a981c33SDaniel Hoffman 696*8a981c33SDaniel Hoffman int 697*8a981c33SDaniel Hoffman zfs_init_libshare_arg(libzfs_handle_t *zhandle, int service, void *arg) 698*8a981c33SDaniel Hoffman { 699*8a981c33SDaniel Hoffman return (zfs_init_libshare_impl(zhandle, service, arg)); 700*8a981c33SDaniel Hoffman } 701*8a981c33SDaniel Hoffman 70267331909Sdougm 70367331909Sdougm /* 70467331909Sdougm * zfs_uninit_libshare(zhandle) 70567331909Sdougm * 70667331909Sdougm * Uninitialize the libshare API if it hasn't already been 70767331909Sdougm * uninitialized. It is OK to call multiple times. 70867331909Sdougm */ 70967331909Sdougm void 71067331909Sdougm zfs_uninit_libshare(libzfs_handle_t *zhandle) 71167331909Sdougm { 71267331909Sdougm if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { 713d8689a57Sdougm if (_sa_fini != NULL) 714d8689a57Sdougm _sa_fini(zhandle->libzfs_sharehdl); 715d8689a57Sdougm zhandle->libzfs_sharehdl = NULL; 71667331909Sdougm } 71767331909Sdougm } 71867331909Sdougm 71967331909Sdougm /* 72067331909Sdougm * zfs_parse_options(options, proto) 72167331909Sdougm * 72267331909Sdougm * Call the legacy parse interface to get the protocol specific 72367331909Sdougm * options using the NULL arg to indicate that this is a "parse" only. 72467331909Sdougm */ 72567331909Sdougm int 726da6c28aaSamw zfs_parse_options(char *options, zfs_share_proto_t proto) 72767331909Sdougm { 7283cb34c60Sahrens if (_sa_parse_legacy_options != NULL) { 7293cb34c60Sahrens return (_sa_parse_legacy_options(NULL, options, 7303cb34c60Sahrens proto_table[proto].p_name)); 7313cb34c60Sahrens } 7323cb34c60Sahrens return (SA_CONFIG_ERR); 73367331909Sdougm } 73467331909Sdougm 73567331909Sdougm /* 73667331909Sdougm * zfs_sa_find_share(handle, path) 73767331909Sdougm * 73867331909Sdougm * wrapper around sa_find_share to find a share path in the 73967331909Sdougm * configuration. 74067331909Sdougm */ 74167331909Sdougm static sa_share_t 74267331909Sdougm zfs_sa_find_share(sa_handle_t handle, char *path) 74367331909Sdougm { 74467331909Sdougm if (_sa_find_share != NULL) 745d8689a57Sdougm return (_sa_find_share(handle, path)); 74667331909Sdougm return (NULL); 74767331909Sdougm } 74867331909Sdougm 74967331909Sdougm /* 75067331909Sdougm * zfs_sa_enable_share(share, proto) 75167331909Sdougm * 75267331909Sdougm * Wrapper for sa_enable_share which enables a share for a specified 75367331909Sdougm * protocol. 75467331909Sdougm */ 75567331909Sdougm static int 75667331909Sdougm zfs_sa_enable_share(sa_share_t share, char *proto) 75767331909Sdougm { 75867331909Sdougm if (_sa_enable_share != NULL) 759d8689a57Sdougm return (_sa_enable_share(share, proto)); 76067331909Sdougm return (SA_CONFIG_ERR); 76167331909Sdougm } 76267331909Sdougm 76367331909Sdougm /* 76467331909Sdougm * zfs_sa_disable_share(share, proto) 76567331909Sdougm * 76667331909Sdougm * Wrapper for sa_enable_share which disables a share for a specified 76767331909Sdougm * protocol. 76867331909Sdougm */ 76967331909Sdougm static int 77067331909Sdougm zfs_sa_disable_share(sa_share_t share, char *proto) 77167331909Sdougm { 77267331909Sdougm if (_sa_disable_share != NULL) 773d8689a57Sdougm return (_sa_disable_share(share, proto)); 77467331909Sdougm return (SA_CONFIG_ERR); 77567331909Sdougm } 77667331909Sdougm 777fa9e4066Sahrens /* 778da6c28aaSamw * Share the given filesystem according to the options in the specified 779da6c28aaSamw * protocol specific properties (sharenfs, sharesmb). We rely 78067331909Sdougm * on "libshare" to the dirty work for us. 781fa9e4066Sahrens */ 782da6c28aaSamw static int 783da6c28aaSamw zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 784fa9e4066Sahrens { 785fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 786fa9e4066Sahrens char shareopts[ZFS_MAXPROPLEN]; 7875b6e0c46Sdougm char sourcestr[ZFS_MAXPROPLEN]; 78899653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 78967331909Sdougm sa_share_t share; 790da6c28aaSamw zfs_share_proto_t *curr_proto; 7915b6e0c46Sdougm zprop_source_t sourcetype; 79267331909Sdougm int ret; 793fa9e4066Sahrens 794e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 795fa9e4066Sahrens return (0); 796fa9e4066Sahrens 797da6c28aaSamw for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { 798da6c28aaSamw /* 799da6c28aaSamw * Return success if there are no share options. 800da6c28aaSamw */ 801da6c28aaSamw if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, 8025b6e0c46Sdougm shareopts, sizeof (shareopts), &sourcetype, sourcestr, 8035b6e0c46Sdougm ZFS_MAXPROPLEN, B_FALSE) != 0 || 8045b6e0c46Sdougm strcmp(shareopts, "off") == 0) 805da6c28aaSamw continue; 806*8a981c33SDaniel Hoffman ret = zfs_init_libshare_arg(hdl, SA_INIT_ONE_SHARE_FROM_HANDLE, 807*8a981c33SDaniel Hoffman zhp); 80833cde0d0SMatthew Ahrens if (ret != SA_OK) { 80933cde0d0SMatthew Ahrens (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 81033cde0d0SMatthew Ahrens dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), 81133cde0d0SMatthew Ahrens zfs_get_name(zhp), _sa_errorstr != NULL ? 81233cde0d0SMatthew Ahrens _sa_errorstr(ret) : ""); 81333cde0d0SMatthew Ahrens return (-1); 81433cde0d0SMatthew Ahrens } 81533cde0d0SMatthew Ahrens 816da6c28aaSamw /* 817da6c28aaSamw * If the 'zoned' property is set, then zfs_is_mountable() 818da6c28aaSamw * will have already bailed out if we are in the global zone. 819da6c28aaSamw * But local zones cannot be NFS servers, so we ignore it for 820da6c28aaSamw * local zones as well. 821da6c28aaSamw */ 822da6c28aaSamw if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) 823da6c28aaSamw continue; 824da6c28aaSamw 825da6c28aaSamw share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); 8265b6e0c46Sdougm if (share == NULL) { 8275b6e0c46Sdougm /* 8285b6e0c46Sdougm * This may be a new file system that was just 8295b6e0c46Sdougm * created so isn't in the internal cache 8305b6e0c46Sdougm * (second time through). Rather than 8315b6e0c46Sdougm * reloading the entire configuration, we can 8325b6e0c46Sdougm * assume ZFS has done the checking and it is 8335b6e0c46Sdougm * safe to add this to the internal 8345b6e0c46Sdougm * configuration. 8355b6e0c46Sdougm */ 8365b6e0c46Sdougm if (_sa_zfs_process_share(hdl->libzfs_sharehdl, 8375b6e0c46Sdougm NULL, NULL, mountpoint, 8385b6e0c46Sdougm proto_table[*curr_proto].p_name, sourcetype, 8395b6e0c46Sdougm shareopts, sourcestr, zhp->zfs_name) != SA_OK) { 8405b6e0c46Sdougm (void) zfs_error_fmt(hdl, 8415b6e0c46Sdougm proto_table[*curr_proto].p_share_err, 8425b6e0c46Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 8435b6e0c46Sdougm zfs_get_name(zhp)); 8445b6e0c46Sdougm return (-1); 8455b6e0c46Sdougm } 8465b6e0c46Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, 8475b6e0c46Sdougm mountpoint); 8485b6e0c46Sdougm } 849da6c28aaSamw if (share != NULL) { 850da6c28aaSamw int err; 851da6c28aaSamw err = zfs_sa_enable_share(share, 852da6c28aaSamw proto_table[*curr_proto].p_name); 853da6c28aaSamw if (err != SA_OK) { 854da6c28aaSamw (void) zfs_error_fmt(hdl, 855da6c28aaSamw proto_table[*curr_proto].p_share_err, 856da6c28aaSamw dgettext(TEXT_DOMAIN, "cannot share '%s'"), 857da6c28aaSamw zfs_get_name(zhp)); 858da6c28aaSamw return (-1); 859da6c28aaSamw } 860da6c28aaSamw } else { 861da6c28aaSamw (void) zfs_error_fmt(hdl, 862da6c28aaSamw proto_table[*curr_proto].p_share_err, 863d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 864d8689a57Sdougm zfs_get_name(zhp)); 865d8689a57Sdougm return (-1); 866d8689a57Sdougm } 867fa9e4066Sahrens 868da6c28aaSamw } 869fa9e4066Sahrens return (0); 870fa9e4066Sahrens } 871fa9e4066Sahrens 872da6c28aaSamw 873da6c28aaSamw int 874da6c28aaSamw zfs_share_nfs(zfs_handle_t *zhp) 875da6c28aaSamw { 876da6c28aaSamw return (zfs_share_proto(zhp, nfs_only)); 877da6c28aaSamw } 878da6c28aaSamw 879da6c28aaSamw int 880da6c28aaSamw zfs_share_smb(zfs_handle_t *zhp) 881da6c28aaSamw { 882da6c28aaSamw return (zfs_share_proto(zhp, smb_only)); 883da6c28aaSamw } 884da6c28aaSamw 885da6c28aaSamw int 886da6c28aaSamw zfs_shareall(zfs_handle_t *zhp) 887da6c28aaSamw { 888da6c28aaSamw return (zfs_share_proto(zhp, share_all_proto)); 889da6c28aaSamw } 890da6c28aaSamw 8913bb79becSeschrock /* 8923bb79becSeschrock * Unshare a filesystem by mountpoint. 8933bb79becSeschrock */ 8943bb79becSeschrock static int 895da6c28aaSamw unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, 896da6c28aaSamw zfs_share_proto_t proto) 8973bb79becSeschrock { 89867331909Sdougm sa_share_t share; 89967331909Sdougm int err; 90067331909Sdougm char *mntpt; 901*8a981c33SDaniel Hoffman 9023bb79becSeschrock /* 90367331909Sdougm * Mountpoint could get trashed if libshare calls getmntany 904ebedde84SEric Taylor * which it does during API initialization, so strdup the 90567331909Sdougm * value. 9063bb79becSeschrock */ 90767331909Sdougm mntpt = zfs_strdup(hdl, mountpoint); 9083bb79becSeschrock 909*8a981c33SDaniel Hoffman /* 910*8a981c33SDaniel Hoffman * make sure libshare initialized, initialize everything because we 911*8a981c33SDaniel Hoffman * don't know what other unsharing may happen later. Functions up the 912*8a981c33SDaniel Hoffman * stack are allowed to initialize instead a subset of shares at the 913*8a981c33SDaniel Hoffman * time the set is known. 914*8a981c33SDaniel Hoffman */ 915*8a981c33SDaniel Hoffman if ((err = zfs_init_libshare_arg(hdl, SA_INIT_ONE_SHARE_FROM_NAME, 916*8a981c33SDaniel Hoffman (void *)name)) != SA_OK) { 91767331909Sdougm free(mntpt); /* don't need the copy anymore */ 918d1672efbSMarcel Telka return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 919d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 920d8689a57Sdougm name, _sa_errorstr(err))); 92167331909Sdougm } 9223bb79becSeschrock 92367331909Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); 92467331909Sdougm free(mntpt); /* don't need the copy anymore */ 9253bb79becSeschrock 92667331909Sdougm if (share != NULL) { 927da6c28aaSamw err = zfs_sa_disable_share(share, proto_table[proto].p_name); 92867331909Sdougm if (err != SA_OK) { 929d8689a57Sdougm return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 930d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 931d8689a57Sdougm name, _sa_errorstr(err))); 93267331909Sdougm } 93367331909Sdougm } else { 934ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 935d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), 936d8689a57Sdougm name)); 9373bb79becSeschrock } 9383bb79becSeschrock return (0); 9393bb79becSeschrock } 9403bb79becSeschrock 941fa9e4066Sahrens /* 942fa9e4066Sahrens * Unshare the given filesystem. 943fa9e4066Sahrens */ 944fa9e4066Sahrens int 945da6c28aaSamw zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, 946da6c28aaSamw zfs_share_proto_t *proto) 947fa9e4066Sahrens { 948ebedde84SEric Taylor libzfs_handle_t *hdl = zhp->zfs_hdl; 949ebedde84SEric Taylor struct mnttab entry; 95067331909Sdougm char *mntpt = NULL; 951fa9e4066Sahrens 952fa9e4066Sahrens /* check to see if need to unmount the filesystem */ 95399653d4eSeschrock rewind(zhp->zfs_hdl->libzfs_mnttab); 954d8689a57Sdougm if (mountpoint != NULL) 955ebedde84SEric Taylor mountpoint = mntpt = zfs_strdup(hdl, mountpoint); 956d8689a57Sdougm 957fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 958ebedde84SEric Taylor libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { 959da6c28aaSamw zfs_share_proto_t *curr_proto; 960fa9e4066Sahrens 961fa9e4066Sahrens if (mountpoint == NULL) 962da6c28aaSamw mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); 963fa9e4066Sahrens 964da6c28aaSamw for (curr_proto = proto; *curr_proto != PROTO_END; 965da6c28aaSamw curr_proto++) { 966da6c28aaSamw 967ebedde84SEric Taylor if (is_shared(hdl, mntpt, *curr_proto) && 968ebedde84SEric Taylor unshare_one(hdl, zhp->zfs_name, 969da6c28aaSamw mntpt, *curr_proto) != 0) { 970da6c28aaSamw if (mntpt != NULL) 971da6c28aaSamw free(mntpt); 972da6c28aaSamw return (-1); 973da6c28aaSamw } 97467331909Sdougm } 975fa9e4066Sahrens } 97667331909Sdougm if (mntpt != NULL) 977d8689a57Sdougm free(mntpt); 978fa9e4066Sahrens 979fa9e4066Sahrens return (0); 980fa9e4066Sahrens } 981fa9e4066Sahrens 982da6c28aaSamw int 983da6c28aaSamw zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) 984da6c28aaSamw { 985da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); 986da6c28aaSamw } 987da6c28aaSamw 988da6c28aaSamw int 989da6c28aaSamw zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) 990da6c28aaSamw { 991da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, smb_only)); 992da6c28aaSamw } 993da6c28aaSamw 994fa9e4066Sahrens /* 995da6c28aaSamw * Same as zfs_unmountall(), but for NFS and SMB unshares. 996fa9e4066Sahrens */ 997fa9e4066Sahrens int 998da6c28aaSamw zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 999fa9e4066Sahrens { 1000fa9e4066Sahrens prop_changelist_t *clp; 1001fa9e4066Sahrens int ret; 1002fa9e4066Sahrens 10030069fd67STim Haley clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); 1004fa9e4066Sahrens if (clp == NULL) 1005fa9e4066Sahrens return (-1); 1006fa9e4066Sahrens 1007da6c28aaSamw ret = changelist_unshare(clp, proto); 1008fa9e4066Sahrens changelist_free(clp); 1009fa9e4066Sahrens 1010fa9e4066Sahrens return (ret); 1011fa9e4066Sahrens } 1012fa9e4066Sahrens 1013da6c28aaSamw int 1014da6c28aaSamw zfs_unshareall_nfs(zfs_handle_t *zhp) 1015da6c28aaSamw { 1016da6c28aaSamw return (zfs_unshareall_proto(zhp, nfs_only)); 1017da6c28aaSamw } 1018da6c28aaSamw 1019da6c28aaSamw int 1020da6c28aaSamw zfs_unshareall_smb(zfs_handle_t *zhp) 1021da6c28aaSamw { 1022da6c28aaSamw return (zfs_unshareall_proto(zhp, smb_only)); 1023da6c28aaSamw } 1024da6c28aaSamw 1025da6c28aaSamw int 1026da6c28aaSamw zfs_unshareall(zfs_handle_t *zhp) 1027da6c28aaSamw { 1028da6c28aaSamw return (zfs_unshareall_proto(zhp, share_all_proto)); 1029da6c28aaSamw } 1030da6c28aaSamw 1031da6c28aaSamw int 1032da6c28aaSamw zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) 1033da6c28aaSamw { 1034da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); 1035da6c28aaSamw } 1036da6c28aaSamw 1037fa9e4066Sahrens /* 1038fa9e4066Sahrens * Remove the mountpoint associated with the current dataset, if necessary. 1039fa9e4066Sahrens * We only remove the underlying directory if: 1040fa9e4066Sahrens * 1041fa9e4066Sahrens * - The mountpoint is not 'none' or 'legacy' 1042fa9e4066Sahrens * - The mountpoint is non-empty 1043fa9e4066Sahrens * - The mountpoint is the default or inherited 1044fa9e4066Sahrens * - The 'zoned' property is set, or we're in a local zone 1045fa9e4066Sahrens * 1046fa9e4066Sahrens * Any other directories we leave alone. 1047fa9e4066Sahrens */ 1048fa9e4066Sahrens void 1049fa9e4066Sahrens remove_mountpoint(zfs_handle_t *zhp) 1050fa9e4066Sahrens { 1051fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 1052990b4856Slling zprop_source_t source; 1053fa9e4066Sahrens 1054e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), 1055e9dbad6fSeschrock &source)) 1056fa9e4066Sahrens return; 1057fa9e4066Sahrens 1058990b4856Slling if (source == ZPROP_SRC_DEFAULT || 1059990b4856Slling source == ZPROP_SRC_INHERITED) { 1060fa9e4066Sahrens /* 1061fa9e4066Sahrens * Try to remove the directory, silently ignoring any errors. 1062fa9e4066Sahrens * The filesystem may have since been removed or moved around, 1063e9dbad6fSeschrock * and this error isn't really useful to the administrator in 1064e9dbad6fSeschrock * any way. 1065fa9e4066Sahrens */ 1066fa9e4066Sahrens (void) rmdir(mountpoint); 1067fa9e4066Sahrens } 1068fa9e4066Sahrens } 10693bb79becSeschrock 10709d9a58e3SEric Taylor void 10719d9a58e3SEric Taylor libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp) 10729d9a58e3SEric Taylor { 10739d9a58e3SEric Taylor if (cbp->cb_alloc == cbp->cb_used) { 10749d9a58e3SEric Taylor size_t newsz; 10759d9a58e3SEric Taylor void *ptr; 10769d9a58e3SEric Taylor 10779d9a58e3SEric Taylor newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64; 10789d9a58e3SEric Taylor ptr = zfs_realloc(zhp->zfs_hdl, 10799d9a58e3SEric Taylor cbp->cb_handles, cbp->cb_alloc * sizeof (void *), 10809d9a58e3SEric Taylor newsz * sizeof (void *)); 10819d9a58e3SEric Taylor cbp->cb_handles = ptr; 10829d9a58e3SEric Taylor cbp->cb_alloc = newsz; 10839d9a58e3SEric Taylor } 10849d9a58e3SEric Taylor cbp->cb_handles[cbp->cb_used++] = zhp; 10859d9a58e3SEric Taylor } 10863bb79becSeschrock 10873bb79becSeschrock static int 10883bb79becSeschrock mount_cb(zfs_handle_t *zhp, void *data) 10893bb79becSeschrock { 10909d9a58e3SEric Taylor get_all_cb_t *cbp = data; 10913bb79becSeschrock 10929d9a58e3SEric Taylor if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) { 10933bb79becSeschrock zfs_close(zhp); 10943bb79becSeschrock return (0); 10953bb79becSeschrock } 10963bb79becSeschrock 1097a227b7f4Shs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { 1098a227b7f4Shs zfs_close(zhp); 1099a227b7f4Shs return (0); 1100a227b7f4Shs } 1101a227b7f4Shs 11029c3fd121SMatthew Ahrens /* 11039c3fd121SMatthew Ahrens * If this filesystem is inconsistent and has a receive resume 11049c3fd121SMatthew Ahrens * token, we can not mount it. 11059c3fd121SMatthew Ahrens */ 11069c3fd121SMatthew Ahrens if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) && 11079c3fd121SMatthew Ahrens zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN, 11089c3fd121SMatthew Ahrens NULL, 0, NULL, NULL, 0, B_TRUE) == 0) { 11099c3fd121SMatthew Ahrens zfs_close(zhp); 11109c3fd121SMatthew Ahrens return (0); 11119c3fd121SMatthew Ahrens } 11129c3fd121SMatthew Ahrens 11139d9a58e3SEric Taylor libzfs_add_handle(cbp, zhp); 11149d9a58e3SEric Taylor if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) { 11159d9a58e3SEric Taylor zfs_close(zhp); 11169d9a58e3SEric Taylor return (-1); 11173bb79becSeschrock } 11189d9a58e3SEric Taylor return (0); 11193bb79becSeschrock } 11203bb79becSeschrock 11219d9a58e3SEric Taylor int 11229d9a58e3SEric Taylor libzfs_dataset_cmp(const void *a, const void *b) 11233bb79becSeschrock { 11243bb79becSeschrock zfs_handle_t **za = (zfs_handle_t **)a; 11253bb79becSeschrock zfs_handle_t **zb = (zfs_handle_t **)b; 11263bb79becSeschrock char mounta[MAXPATHLEN]; 11273bb79becSeschrock char mountb[MAXPATHLEN]; 1128f3861e1aSahl boolean_t gota, gotb; 1129f3861e1aSahl 1130f3861e1aSahl if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) 1131f3861e1aSahl verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, 1132f3861e1aSahl sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 1133f3861e1aSahl if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) 1134f3861e1aSahl verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, 1135f3861e1aSahl sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 1136f3861e1aSahl 1137f3861e1aSahl if (gota && gotb) 1138f3861e1aSahl return (strcmp(mounta, mountb)); 11393bb79becSeschrock 1140f3861e1aSahl if (gota) 1141f3861e1aSahl return (-1); 1142f3861e1aSahl if (gotb) 1143f3861e1aSahl return (1); 11443bb79becSeschrock 1145f3861e1aSahl return (strcmp(zfs_get_name(a), zfs_get_name(b))); 11463bb79becSeschrock } 11473bb79becSeschrock 1148f3861e1aSahl /* 1149f3861e1aSahl * Mount and share all datasets within the given pool. This assumes that no 1150f3861e1aSahl * datasets within the pool are currently mounted. Because users can create 1151f3861e1aSahl * complicated nested hierarchies of mountpoints, we first gather all the 1152f3861e1aSahl * datasets and mountpoints within the pool, and sort them by mountpoint. Once 1153f3861e1aSahl * we have the list of all filesystems, we iterate over them in order and mount 1154f3861e1aSahl * and/or share each one. 1155f3861e1aSahl */ 1156f3861e1aSahl #pragma weak zpool_mount_datasets = zpool_enable_datasets 11573bb79becSeschrock int 1158f3861e1aSahl zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) 11593bb79becSeschrock { 11609d9a58e3SEric Taylor get_all_cb_t cb = { 0 }; 11613bb79becSeschrock libzfs_handle_t *hdl = zhp->zpool_hdl; 11623bb79becSeschrock zfs_handle_t *zfsp; 11633bb79becSeschrock int i, ret = -1; 116467331909Sdougm int *good; 11653bb79becSeschrock 11663bb79becSeschrock /* 1167d87468daSrm * Gather all non-snap datasets within the pool. 11683bb79becSeschrock */ 1169990b4856Slling if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) 11703bb79becSeschrock goto out; 11713bb79becSeschrock 11729d9a58e3SEric Taylor libzfs_add_handle(&cb, zfsp); 1173d87468daSrm if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) 11743bb79becSeschrock goto out; 11753bb79becSeschrock /* 11763bb79becSeschrock * Sort the datasets by mountpoint. 11773bb79becSeschrock */ 11789d9a58e3SEric Taylor qsort(cb.cb_handles, cb.cb_used, sizeof (void *), 11799d9a58e3SEric Taylor libzfs_dataset_cmp); 11803bb79becSeschrock 11813bb79becSeschrock /* 118267331909Sdougm * And mount all the datasets, keeping track of which ones 11836e77af0aSDavid Pacheco * succeeded or failed. 11843bb79becSeschrock */ 11856e77af0aSDavid Pacheco if ((good = zfs_alloc(zhp->zpool_hdl, 11866e77af0aSDavid Pacheco cb.cb_used * sizeof (int))) == NULL) 11876e77af0aSDavid Pacheco goto out; 11886e77af0aSDavid Pacheco 11893bb79becSeschrock ret = 0; 11903bb79becSeschrock for (i = 0; i < cb.cb_used; i++) { 11919d9a58e3SEric Taylor if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0) 11923bb79becSeschrock ret = -1; 1193d8689a57Sdougm else 119467331909Sdougm good[i] = 1; 11953bb79becSeschrock } 11965b6e0c46Sdougm 119767331909Sdougm /* 119867331909Sdougm * Then share all the ones that need to be shared. This needs 119967331909Sdougm * to be a separate pass in order to avoid excessive reloading 120067331909Sdougm * of the configuration. Good should never be NULL since 120167331909Sdougm * zfs_alloc is supposed to exit if memory isn't available. 120267331909Sdougm */ 120367331909Sdougm for (i = 0; i < cb.cb_used; i++) { 12049d9a58e3SEric Taylor if (good[i] && zfs_share(cb.cb_handles[i]) != 0) 120567331909Sdougm ret = -1; 120667331909Sdougm } 120767331909Sdougm 120867331909Sdougm free(good); 12093bb79becSeschrock 12103bb79becSeschrock out: 12113bb79becSeschrock for (i = 0; i < cb.cb_used; i++) 12129d9a58e3SEric Taylor zfs_close(cb.cb_handles[i]); 12139d9a58e3SEric Taylor free(cb.cb_handles); 12143bb79becSeschrock 12153bb79becSeschrock return (ret); 12163bb79becSeschrock } 12173bb79becSeschrock 12183bb79becSeschrock static int 12193bb79becSeschrock mountpoint_compare(const void *a, const void *b) 12203bb79becSeschrock { 12213bb79becSeschrock const char *mounta = *((char **)a); 12223bb79becSeschrock const char *mountb = *((char **)b); 12233bb79becSeschrock 12243bb79becSeschrock return (strcmp(mountb, mounta)); 12253bb79becSeschrock } 12263bb79becSeschrock 1227681d9761SEric Taylor /* alias for 2002/240 */ 1228681d9761SEric Taylor #pragma weak zpool_unmount_datasets = zpool_disable_datasets 1229f3861e1aSahl /* 1230f3861e1aSahl * Unshare and unmount all datasets within the given pool. We don't want to 1231f3861e1aSahl * rely on traversing the DSL to discover the filesystems within the pool, 1232f3861e1aSahl * because this may be expensive (if not all of them are mounted), and can fail 1233f3861e1aSahl * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and 1234f3861e1aSahl * gather all the filesystems that are currently mounted. 1235f3861e1aSahl */ 12363bb79becSeschrock int 1237f3861e1aSahl zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) 12383bb79becSeschrock { 12393bb79becSeschrock int used, alloc; 12403bb79becSeschrock struct mnttab entry; 12413bb79becSeschrock size_t namelen; 12423bb79becSeschrock char **mountpoints = NULL; 12433bb79becSeschrock zfs_handle_t **datasets = NULL; 12443bb79becSeschrock libzfs_handle_t *hdl = zhp->zpool_hdl; 12453bb79becSeschrock int i; 12463bb79becSeschrock int ret = -1; 12473bb79becSeschrock int flags = (force ? MS_FORCE : 0); 1248*8a981c33SDaniel Hoffman sa_init_selective_arg_t sharearg; 12493bb79becSeschrock 12503bb79becSeschrock namelen = strlen(zhp->zpool_name); 12513bb79becSeschrock 12523bb79becSeschrock rewind(hdl->libzfs_mnttab); 12533bb79becSeschrock used = alloc = 0; 12543bb79becSeschrock while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 12553bb79becSeschrock /* 12563bb79becSeschrock * Ignore non-ZFS entries. 12573bb79becSeschrock */ 12583bb79becSeschrock if (entry.mnt_fstype == NULL || 12593bb79becSeschrock strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 12603bb79becSeschrock continue; 12613bb79becSeschrock 12623bb79becSeschrock /* 12633bb79becSeschrock * Ignore filesystems not within this pool. 12643bb79becSeschrock */ 12653bb79becSeschrock if (entry.mnt_mountp == NULL || 12663bb79becSeschrock strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || 12673bb79becSeschrock (entry.mnt_special[namelen] != '/' && 12683bb79becSeschrock entry.mnt_special[namelen] != '\0')) 12693bb79becSeschrock continue; 12703bb79becSeschrock 12713bb79becSeschrock /* 12723bb79becSeschrock * At this point we've found a filesystem within our pool. Add 12733bb79becSeschrock * it to our growing list. 12743bb79becSeschrock */ 12753bb79becSeschrock if (used == alloc) { 12763bb79becSeschrock if (alloc == 0) { 12773bb79becSeschrock if ((mountpoints = zfs_alloc(hdl, 12783bb79becSeschrock 8 * sizeof (void *))) == NULL) 12793bb79becSeschrock goto out; 12803bb79becSeschrock 12813bb79becSeschrock if ((datasets = zfs_alloc(hdl, 12823bb79becSeschrock 8 * sizeof (void *))) == NULL) 12833bb79becSeschrock goto out; 12843bb79becSeschrock 12853bb79becSeschrock alloc = 8; 12863bb79becSeschrock } else { 1287e9dbad6fSeschrock void *ptr; 12883bb79becSeschrock 1289e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, mountpoints, 1290e9dbad6fSeschrock alloc * sizeof (void *), 12913bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 12923bb79becSeschrock goto out; 1293e9dbad6fSeschrock mountpoints = ptr; 12943bb79becSeschrock 1295e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, datasets, 1296e9dbad6fSeschrock alloc * sizeof (void *), 12973bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 12983bb79becSeschrock goto out; 1299e9dbad6fSeschrock datasets = ptr; 13003bb79becSeschrock 13013bb79becSeschrock alloc *= 2; 13023bb79becSeschrock } 13033bb79becSeschrock } 13043bb79becSeschrock 13053bb79becSeschrock if ((mountpoints[used] = zfs_strdup(hdl, 13063bb79becSeschrock entry.mnt_mountp)) == NULL) 13073bb79becSeschrock goto out; 13083bb79becSeschrock 13093bb79becSeschrock /* 13103bb79becSeschrock * This is allowed to fail, in case there is some I/O error. It 13113bb79becSeschrock * is only used to determine if we need to remove the underlying 13123bb79becSeschrock * mountpoint, so failure is not fatal. 13133bb79becSeschrock */ 13143bb79becSeschrock datasets[used] = make_dataset_handle(hdl, entry.mnt_special); 13153bb79becSeschrock 13163bb79becSeschrock used++; 13173bb79becSeschrock } 13183bb79becSeschrock 13193bb79becSeschrock /* 13203bb79becSeschrock * At this point, we have the entire list of filesystems, so sort it by 13213bb79becSeschrock * mountpoint. 13223bb79becSeschrock */ 1323*8a981c33SDaniel Hoffman sharearg.zhandle_arr = datasets; 1324*8a981c33SDaniel Hoffman sharearg.zhandle_len = used; 1325*8a981c33SDaniel Hoffman ret = zfs_init_libshare_arg(hdl, SA_INIT_SHARE_API_SELECTIVE, 1326*8a981c33SDaniel Hoffman &sharearg); 1327*8a981c33SDaniel Hoffman if (ret != 0) 1328*8a981c33SDaniel Hoffman goto out; 13293bb79becSeschrock qsort(mountpoints, used, sizeof (char *), mountpoint_compare); 13303bb79becSeschrock 13313bb79becSeschrock /* 13323bb79becSeschrock * Walk through and first unshare everything. 13333bb79becSeschrock */ 13343bb79becSeschrock for (i = 0; i < used; i++) { 1335da6c28aaSamw zfs_share_proto_t *curr_proto; 1336da6c28aaSamw for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 1337da6c28aaSamw curr_proto++) { 1338da6c28aaSamw if (is_shared(hdl, mountpoints[i], *curr_proto) && 1339da6c28aaSamw unshare_one(hdl, mountpoints[i], 1340da6c28aaSamw mountpoints[i], *curr_proto) != 0) 1341da6c28aaSamw goto out; 1342da6c28aaSamw } 13433bb79becSeschrock } 13443bb79becSeschrock 13453bb79becSeschrock /* 13463bb79becSeschrock * Now unmount everything, removing the underlying directories as 13473bb79becSeschrock * appropriate. 13483bb79becSeschrock */ 13493bb79becSeschrock for (i = 0; i < used; i++) { 13503bb79becSeschrock if (unmount_one(hdl, mountpoints[i], flags) != 0) 13513bb79becSeschrock goto out; 1352e9dbad6fSeschrock } 13533bb79becSeschrock 1354e9dbad6fSeschrock for (i = 0; i < used; i++) { 13553bb79becSeschrock if (datasets[i]) 13563bb79becSeschrock remove_mountpoint(datasets[i]); 13573bb79becSeschrock } 13583bb79becSeschrock 13593bb79becSeschrock ret = 0; 13603bb79becSeschrock out: 13613bb79becSeschrock for (i = 0; i < used; i++) { 13623bb79becSeschrock if (datasets[i]) 13633bb79becSeschrock zfs_close(datasets[i]); 13643bb79becSeschrock free(mountpoints[i]); 13653bb79becSeschrock } 13663bb79becSeschrock free(datasets); 13673bb79becSeschrock free(mountpoints); 13683bb79becSeschrock 13693bb79becSeschrock return (ret); 13703bb79becSeschrock } 1371