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 /* 23dc7cd546SMark Shellenbaum * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens /* 27fa9e4066Sahrens * Routines to manage ZFS mounts. We separate all the nasty routines that have 28f3861e1aSahl * to deal with the OS. The following functions are the main entry points -- 29f3861e1aSahl * they are used by mount and unmount and when changing a filesystem's 30f3861e1aSahl * mountpoint. 31fa9e4066Sahrens * 32fa9e4066Sahrens * zfs_is_mounted() 33fa9e4066Sahrens * zfs_mount() 34fa9e4066Sahrens * zfs_unmount() 35fa9e4066Sahrens * zfs_unmountall() 36fa9e4066Sahrens * 37f3861e1aSahl * This file also contains the functions used to manage sharing filesystems via 38f3861e1aSahl * NFS and iSCSI: 39fa9e4066Sahrens * 40fa9e4066Sahrens * zfs_is_shared() 41fa9e4066Sahrens * zfs_share() 42fa9e4066Sahrens * zfs_unshare() 43f3861e1aSahl * 44f3861e1aSahl * zfs_is_shared_nfs() 45da6c28aaSamw * zfs_is_shared_smb() 46da6c28aaSamw * zfs_share_proto() 47da6c28aaSamw * zfs_shareall(); 48da6c28aaSamw * zfs_unshare_nfs() 49da6c28aaSamw * zfs_unshare_smb() 50da6c28aaSamw * zfs_unshareall_nfs() 51da6c28aaSamw * zfs_unshareall_smb() 52da6c28aaSamw * zfs_unshareall() 53da6c28aaSamw * zfs_unshareall_bypath() 543bb79becSeschrock * 553bb79becSeschrock * The following functions are available for pool consumers, and will 56f3861e1aSahl * mount/unmount and share/unshare all datasets within pool: 573bb79becSeschrock * 58f3861e1aSahl * zpool_enable_datasets() 59f3861e1aSahl * zpool_disable_datasets() 60fa9e4066Sahrens */ 61fa9e4066Sahrens 62fa9e4066Sahrens #include <dirent.h> 63d8d59944Sahl #include <dlfcn.h> 64fa9e4066Sahrens #include <errno.h> 65fa9e4066Sahrens #include <libgen.h> 66fa9e4066Sahrens #include <libintl.h> 67fa9e4066Sahrens #include <stdio.h> 68fa9e4066Sahrens #include <stdlib.h> 69fa9e4066Sahrens #include <strings.h> 70fa9e4066Sahrens #include <unistd.h> 71fa9e4066Sahrens #include <zone.h> 72fa9e4066Sahrens #include <sys/mntent.h> 73fa9e4066Sahrens #include <sys/mount.h> 74fa9e4066Sahrens #include <sys/stat.h> 75fa9e4066Sahrens 76fa9e4066Sahrens #include <libzfs.h> 77fa9e4066Sahrens 78fa9e4066Sahrens #include "libzfs_impl.h" 79fa9e4066Sahrens 8067331909Sdougm #include <libshare.h> 8167331909Sdougm #include <sys/systeminfo.h> 8267331909Sdougm #define MAXISALEN 257 /* based on sysinfo(2) man page */ 8367331909Sdougm 84da6c28aaSamw static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); 85da6c28aaSamw zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, 86da6c28aaSamw zfs_share_proto_t); 87da6c28aaSamw 88da6c28aaSamw /* 89da6c28aaSamw * The share protocols table must be in the same order as the zfs_share_prot_t 90da6c28aaSamw * enum in libzfs_impl.h 91da6c28aaSamw */ 92da6c28aaSamw typedef struct { 93da6c28aaSamw zfs_prop_t p_prop; 94da6c28aaSamw char *p_name; 95da6c28aaSamw int p_share_err; 96da6c28aaSamw int p_unshare_err; 97da6c28aaSamw } proto_table_t; 98da6c28aaSamw 99da6c28aaSamw proto_table_t proto_table[PROTO_END] = { 100da6c28aaSamw {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, 101da6c28aaSamw {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, 102da6c28aaSamw }; 103da6c28aaSamw 104da6c28aaSamw zfs_share_proto_t nfs_only[] = { 105da6c28aaSamw PROTO_NFS, 106da6c28aaSamw PROTO_END 107da6c28aaSamw }; 108da6c28aaSamw 109da6c28aaSamw zfs_share_proto_t smb_only[] = { 110da6c28aaSamw PROTO_SMB, 111da6c28aaSamw PROTO_END 112da6c28aaSamw }; 113da6c28aaSamw zfs_share_proto_t share_all_proto[] = { 114da6c28aaSamw PROTO_NFS, 115da6c28aaSamw PROTO_SMB, 116da6c28aaSamw PROTO_END 117da6c28aaSamw }; 118da6c28aaSamw 119fa9e4066Sahrens /* 120da6c28aaSamw * Search the sharetab for the given mountpoint and protocol, returning 121da6c28aaSamw * a zfs_share_type_t value. 122fa9e4066Sahrens */ 123da6c28aaSamw static zfs_share_type_t 124da6c28aaSamw is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) 125fa9e4066Sahrens { 126fa9e4066Sahrens char buf[MAXPATHLEN], *tab; 127da6c28aaSamw char *ptr; 128fa9e4066Sahrens 12999653d4eSeschrock if (hdl->libzfs_sharetab == NULL) 130da6c28aaSamw return (SHARED_NOT_SHARED); 131fa9e4066Sahrens 13299653d4eSeschrock (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); 133fa9e4066Sahrens 13499653d4eSeschrock while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { 135fa9e4066Sahrens 136fa9e4066Sahrens /* the mountpoint is the first entry on each line */ 137da6c28aaSamw if ((tab = strchr(buf, '\t')) == NULL) 138da6c28aaSamw continue; 139da6c28aaSamw 140da6c28aaSamw *tab = '\0'; 141da6c28aaSamw if (strcmp(buf, mountpoint) == 0) { 142da6c28aaSamw /* 143da6c28aaSamw * the protocol field is the third field 144da6c28aaSamw * skip over second field 145da6c28aaSamw */ 146da6c28aaSamw ptr = ++tab; 147da6c28aaSamw if ((tab = strchr(ptr, '\t')) == NULL) 148da6c28aaSamw continue; 149da6c28aaSamw ptr = ++tab; 150da6c28aaSamw if ((tab = strchr(ptr, '\t')) == NULL) 151da6c28aaSamw continue; 152fa9e4066Sahrens *tab = '\0'; 153da6c28aaSamw if (strcmp(ptr, 154da6c28aaSamw proto_table[proto].p_name) == 0) { 155da6c28aaSamw switch (proto) { 156da6c28aaSamw case PROTO_NFS: 157da6c28aaSamw return (SHARED_NFS); 158da6c28aaSamw case PROTO_SMB: 159da6c28aaSamw return (SHARED_SMB); 160da6c28aaSamw default: 161da6c28aaSamw return (0); 162da6c28aaSamw } 163da6c28aaSamw } 164fa9e4066Sahrens } 165fa9e4066Sahrens } 166fa9e4066Sahrens 167da6c28aaSamw return (SHARED_NOT_SHARED); 168fa9e4066Sahrens } 169fa9e4066Sahrens 170fa9e4066Sahrens /* 17199653d4eSeschrock * Returns true if the specified directory is empty. If we can't open the 17299653d4eSeschrock * directory at all, return true so that the mount can fail with a more 173fa9e4066Sahrens * informative error message. 174fa9e4066Sahrens */ 17599653d4eSeschrock static boolean_t 176fa9e4066Sahrens dir_is_empty(const char *dirname) 177fa9e4066Sahrens { 178fa9e4066Sahrens DIR *dirp; 179fa9e4066Sahrens struct dirent64 *dp; 180fa9e4066Sahrens 181fa9e4066Sahrens if ((dirp = opendir(dirname)) == NULL) 18299653d4eSeschrock return (B_TRUE); 183fa9e4066Sahrens 184fa9e4066Sahrens while ((dp = readdir64(dirp)) != NULL) { 185fa9e4066Sahrens 186fa9e4066Sahrens if (strcmp(dp->d_name, ".") == 0 || 187fa9e4066Sahrens strcmp(dp->d_name, "..") == 0) 188fa9e4066Sahrens continue; 189fa9e4066Sahrens 190fa9e4066Sahrens (void) closedir(dirp); 19199653d4eSeschrock return (B_FALSE); 192fa9e4066Sahrens } 193fa9e4066Sahrens 194fa9e4066Sahrens (void) closedir(dirp); 19599653d4eSeschrock return (B_TRUE); 196fa9e4066Sahrens } 197fa9e4066Sahrens 198fa9e4066Sahrens /* 199fa9e4066Sahrens * Checks to see if the mount is active. If the filesystem is mounted, we fill 200fa9e4066Sahrens * in 'where' with the current mountpoint, and return 1. Otherwise, we return 201fa9e4066Sahrens * 0. 202fa9e4066Sahrens */ 20399653d4eSeschrock boolean_t 20455434c77Sek is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) 205fa9e4066Sahrens { 206ebedde84SEric Taylor struct mnttab entry; 207fa9e4066Sahrens 208ebedde84SEric Taylor if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) 20999653d4eSeschrock return (B_FALSE); 210fa9e4066Sahrens 211fa9e4066Sahrens if (where != NULL) 21255434c77Sek *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); 213fa9e4066Sahrens 21499653d4eSeschrock return (B_TRUE); 215fa9e4066Sahrens } 216fa9e4066Sahrens 21755434c77Sek boolean_t 21855434c77Sek zfs_is_mounted(zfs_handle_t *zhp, char **where) 21955434c77Sek { 22055434c77Sek return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); 22155434c77Sek } 22255434c77Sek 223e9dbad6fSeschrock /* 224e9dbad6fSeschrock * Returns true if the given dataset is mountable, false otherwise. Returns the 225e9dbad6fSeschrock * mountpoint in 'buf'. 226e9dbad6fSeschrock */ 227e9dbad6fSeschrock static boolean_t 228e9dbad6fSeschrock zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, 229990b4856Slling zprop_source_t *source) 230e9dbad6fSeschrock { 231e9dbad6fSeschrock char sourceloc[ZFS_MAXNAMELEN]; 232990b4856Slling zprop_source_t sourcetype; 233e9dbad6fSeschrock 234e9dbad6fSeschrock if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) 235e9dbad6fSeschrock return (B_FALSE); 236e9dbad6fSeschrock 237e9dbad6fSeschrock verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, 238e9dbad6fSeschrock &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); 239e9dbad6fSeschrock 240e9dbad6fSeschrock if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || 241e9dbad6fSeschrock strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) 242e9dbad6fSeschrock return (B_FALSE); 243e9dbad6fSeschrock 244a227b7f4Shs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) 245e9dbad6fSeschrock return (B_FALSE); 246e9dbad6fSeschrock 247e9dbad6fSeschrock if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && 248e9dbad6fSeschrock getzoneid() == GLOBAL_ZONEID) 249e9dbad6fSeschrock return (B_FALSE); 250e9dbad6fSeschrock 251e9dbad6fSeschrock if (source) 252e9dbad6fSeschrock *source = sourcetype; 253e9dbad6fSeschrock 254e9dbad6fSeschrock return (B_TRUE); 255e9dbad6fSeschrock } 256e9dbad6fSeschrock 257fa9e4066Sahrens /* 258fa9e4066Sahrens * Mount the given filesystem. 259fa9e4066Sahrens */ 260fa9e4066Sahrens int 261fa9e4066Sahrens zfs_mount(zfs_handle_t *zhp, const char *options, int flags) 262fa9e4066Sahrens { 263fa9e4066Sahrens struct stat buf; 264fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 265fa9e4066Sahrens char mntopts[MNT_LINE_MAX]; 26699653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 267fa9e4066Sahrens 268fa9e4066Sahrens if (options == NULL) 269fa9e4066Sahrens mntopts[0] = '\0'; 270fa9e4066Sahrens else 271fa9e4066Sahrens (void) strlcpy(mntopts, options, sizeof (mntopts)); 272fa9e4066Sahrens 273*f9af39baSGeorge Wilson /* 274*f9af39baSGeorge Wilson * If the pool is imported read-only then all mounts must be read-only 275*f9af39baSGeorge Wilson */ 276*f9af39baSGeorge Wilson if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL)) 277*f9af39baSGeorge Wilson flags |= MS_RDONLY; 278*f9af39baSGeorge Wilson 279e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 28099653d4eSeschrock return (0); 281fa9e4066Sahrens 282fa9e4066Sahrens /* Create the directory if it doesn't already exist */ 283fa9e4066Sahrens if (lstat(mountpoint, &buf) != 0) { 284fa9e4066Sahrens if (mkdirp(mountpoint, 0755) != 0) { 28599653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 28699653d4eSeschrock "failed to create mountpoint")); 287ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 28899653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 28999653d4eSeschrock mountpoint)); 290fa9e4066Sahrens } 291fa9e4066Sahrens } 292fa9e4066Sahrens 293fa9e4066Sahrens /* 294fa9e4066Sahrens * Determine if the mountpoint is empty. If so, refuse to perform the 295fa9e4066Sahrens * mount. We don't perform this check if MS_OVERLAY is specified, which 296fa9e4066Sahrens * would defeat the point. We also avoid this check if 'remount' is 297fa9e4066Sahrens * specified. 298fa9e4066Sahrens */ 299fa9e4066Sahrens if ((flags & MS_OVERLAY) == 0 && 300fa9e4066Sahrens strstr(mntopts, MNTOPT_REMOUNT) == NULL && 301fa9e4066Sahrens !dir_is_empty(mountpoint)) { 30299653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 30399653d4eSeschrock "directory is not empty")); 304ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 30599653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); 306fa9e4066Sahrens } 307fa9e4066Sahrens 308fa9e4066Sahrens /* perform the mount */ 309fa9e4066Sahrens if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, 310fa9e4066Sahrens MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { 311fa9e4066Sahrens /* 312fa9e4066Sahrens * Generic errors are nasty, but there are just way too many 313fa9e4066Sahrens * from mount(), and they're well-understood. We pick a few 314fa9e4066Sahrens * common ones to improve upon. 315fa9e4066Sahrens */ 316d8689a57Sdougm if (errno == EBUSY) { 31799653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 31899653d4eSeschrock "mountpoint or dataset is busy")); 319ecd6cf80Smarks } else if (errno == EPERM) { 320ecd6cf80Smarks zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 321ecd6cf80Smarks "Insufficient privileges")); 32254a91118SChris Kirby } else if (errno == ENOTSUP) { 32354a91118SChris Kirby char buf[256]; 324dc7cd546SMark Shellenbaum int spa_version; 32554a91118SChris Kirby 326dc7cd546SMark Shellenbaum VERIFY(zfs_spa_version(zhp, &spa_version) == 0); 32754a91118SChris Kirby (void) snprintf(buf, sizeof (buf), 328dc7cd546SMark Shellenbaum dgettext(TEXT_DOMAIN, "Can't mount a version %lld " 329dc7cd546SMark Shellenbaum "file system on a version %d pool. Pool must be" 330dc7cd546SMark Shellenbaum " upgraded to mount this file system."), 33154a91118SChris Kirby (u_longlong_t)zfs_prop_get_int(zhp, 332dc7cd546SMark Shellenbaum ZFS_PROP_VERSION), spa_version); 33354a91118SChris Kirby zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); 334d8689a57Sdougm } else { 33599653d4eSeschrock zfs_error_aux(hdl, strerror(errno)); 336d8689a57Sdougm } 337ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 33899653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 33999653d4eSeschrock zhp->zfs_name)); 340fa9e4066Sahrens } 341fa9e4066Sahrens 342ebedde84SEric Taylor /* add the mounted entry into our cache */ 343ebedde84SEric Taylor libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, 344ebedde84SEric Taylor mntopts); 345fa9e4066Sahrens return (0); 346fa9e4066Sahrens } 347fa9e4066Sahrens 3483bb79becSeschrock /* 3493bb79becSeschrock * Unmount a single filesystem. 3503bb79becSeschrock */ 3513bb79becSeschrock static int 3523bb79becSeschrock unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) 3533bb79becSeschrock { 3543bb79becSeschrock if (umount2(mountpoint, flags) != 0) { 3553bb79becSeschrock zfs_error_aux(hdl, strerror(errno)); 356ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, 3573bb79becSeschrock dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), 3583bb79becSeschrock mountpoint)); 3593bb79becSeschrock } 3603bb79becSeschrock 3613bb79becSeschrock return (0); 3623bb79becSeschrock } 3633bb79becSeschrock 364fa9e4066Sahrens /* 365fa9e4066Sahrens * Unmount the given filesystem. 366fa9e4066Sahrens */ 367fa9e4066Sahrens int 368fa9e4066Sahrens zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) 369fa9e4066Sahrens { 370ebedde84SEric Taylor libzfs_handle_t *hdl = zhp->zfs_hdl; 371ebedde84SEric Taylor struct mnttab entry; 37267331909Sdougm char *mntpt = NULL; 373fa9e4066Sahrens 374ebedde84SEric Taylor /* check to see if we need to unmount the filesystem */ 375fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 376ebedde84SEric Taylor libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { 37767331909Sdougm /* 37867331909Sdougm * mountpoint may have come from a call to 37967331909Sdougm * getmnt/getmntany if it isn't NULL. If it is NULL, 380ebedde84SEric Taylor * we know it comes from libzfs_mnttab_find which can 381ebedde84SEric Taylor * then get freed later. We strdup it to play it safe. 38267331909Sdougm */ 383fa9e4066Sahrens if (mountpoint == NULL) 384ebedde84SEric Taylor mntpt = zfs_strdup(hdl, entry.mnt_mountp); 38567331909Sdougm else 386ebedde84SEric Taylor mntpt = zfs_strdup(hdl, mountpoint); 387fa9e4066Sahrens 388fa9e4066Sahrens /* 3893bb79becSeschrock * Unshare and unmount the filesystem 390fa9e4066Sahrens */ 391da6c28aaSamw if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) 392eb66cf86Sth return (-1); 393eb66cf86Sth 394ebedde84SEric Taylor if (unmount_one(hdl, mntpt, flags) != 0) { 39567331909Sdougm free(mntpt); 396da6c28aaSamw (void) zfs_shareall(zhp); 397fa9e4066Sahrens return (-1); 39867331909Sdougm } 399ebedde84SEric Taylor libzfs_mnttab_remove(hdl, zhp->zfs_name); 40067331909Sdougm free(mntpt); 401fa9e4066Sahrens } 402fa9e4066Sahrens 403fa9e4066Sahrens return (0); 404fa9e4066Sahrens } 405fa9e4066Sahrens 406fa9e4066Sahrens /* 407fa9e4066Sahrens * Unmount this filesystem and any children inheriting the mountpoint property. 408fa9e4066Sahrens * To do this, just act like we're changing the mountpoint property, but don't 409fa9e4066Sahrens * remount the filesystems afterwards. 410fa9e4066Sahrens */ 411fa9e4066Sahrens int 412fa9e4066Sahrens zfs_unmountall(zfs_handle_t *zhp, int flags) 413fa9e4066Sahrens { 414fa9e4066Sahrens prop_changelist_t *clp; 415fa9e4066Sahrens int ret; 416fa9e4066Sahrens 4170069fd67STim Haley clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); 418fa9e4066Sahrens if (clp == NULL) 419fa9e4066Sahrens return (-1); 420fa9e4066Sahrens 421fa9e4066Sahrens ret = changelist_prefix(clp); 422fa9e4066Sahrens changelist_free(clp); 423fa9e4066Sahrens 424fa9e4066Sahrens return (ret); 425fa9e4066Sahrens } 426fa9e4066Sahrens 427f3861e1aSahl boolean_t 428f3861e1aSahl zfs_is_shared(zfs_handle_t *zhp) 429f3861e1aSahl { 430da6c28aaSamw zfs_share_type_t rc = 0; 431da6c28aaSamw zfs_share_proto_t *curr_proto; 432da6c28aaSamw 433f3861e1aSahl if (ZFS_IS_VOLUME(zhp)) 434ab003da8SJim Dunham return (B_FALSE); 435f3861e1aSahl 436da6c28aaSamw for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 437da6c28aaSamw curr_proto++) 438da6c28aaSamw rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); 439da6c28aaSamw 440da6c28aaSamw return (rc ? B_TRUE : B_FALSE); 441f3861e1aSahl } 442f3861e1aSahl 443f3861e1aSahl int 444f3861e1aSahl zfs_share(zfs_handle_t *zhp) 445f3861e1aSahl { 4469d9a58e3SEric Taylor assert(!ZFS_IS_VOLUME(zhp)); 447da6c28aaSamw return (zfs_share_proto(zhp, share_all_proto)); 448f3861e1aSahl } 449f3861e1aSahl 450f3861e1aSahl int 451f3861e1aSahl zfs_unshare(zfs_handle_t *zhp) 452f3861e1aSahl { 4539d9a58e3SEric Taylor assert(!ZFS_IS_VOLUME(zhp)); 454da6c28aaSamw return (zfs_unshareall(zhp)); 455f3861e1aSahl } 456f3861e1aSahl 457fa9e4066Sahrens /* 458fa9e4066Sahrens * Check to see if the filesystem is currently shared. 459fa9e4066Sahrens */ 460da6c28aaSamw zfs_share_type_t 461da6c28aaSamw zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) 462fa9e4066Sahrens { 463fa9e4066Sahrens char *mountpoint; 464da6c28aaSamw zfs_share_type_t rc; 465fa9e4066Sahrens 466fa9e4066Sahrens if (!zfs_is_mounted(zhp, &mountpoint)) 467da6c28aaSamw return (SHARED_NOT_SHARED); 468fa9e4066Sahrens 469da6c28aaSamw if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) { 470fa9e4066Sahrens if (where != NULL) 471fa9e4066Sahrens *where = mountpoint; 472fa9e4066Sahrens else 473fa9e4066Sahrens free(mountpoint); 474da6c28aaSamw return (rc); 475fa9e4066Sahrens } else { 476fa9e4066Sahrens free(mountpoint); 477da6c28aaSamw return (SHARED_NOT_SHARED); 478fa9e4066Sahrens } 479fa9e4066Sahrens } 480fa9e4066Sahrens 481da6c28aaSamw boolean_t 482da6c28aaSamw zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) 483da6c28aaSamw { 484da6c28aaSamw return (zfs_is_shared_proto(zhp, where, 485da6c28aaSamw PROTO_NFS) != SHARED_NOT_SHARED); 486da6c28aaSamw } 487da6c28aaSamw 488da6c28aaSamw boolean_t 489da6c28aaSamw zfs_is_shared_smb(zfs_handle_t *zhp, char **where) 490da6c28aaSamw { 491da6c28aaSamw return (zfs_is_shared_proto(zhp, where, 492da6c28aaSamw PROTO_SMB) != SHARED_NOT_SHARED); 493da6c28aaSamw } 494da6c28aaSamw 49567331909Sdougm /* 49667331909Sdougm * Make sure things will work if libshare isn't installed by using 49767331909Sdougm * wrapper functions that check to see that the pointers to functions 49867331909Sdougm * initialized in _zfs_init_libshare() are actually present. 49967331909Sdougm */ 50067331909Sdougm 50167331909Sdougm static sa_handle_t (*_sa_init)(int); 50267331909Sdougm static void (*_sa_fini)(sa_handle_t); 50367331909Sdougm static sa_share_t (*_sa_find_share)(sa_handle_t, char *); 50467331909Sdougm static int (*_sa_enable_share)(sa_share_t, char *); 50567331909Sdougm static int (*_sa_disable_share)(sa_share_t, char *); 50667331909Sdougm static char *(*_sa_errorstr)(int); 50767331909Sdougm static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); 5085b6e0c46Sdougm static boolean_t (*_sa_needs_refresh)(sa_handle_t *); 5095b6e0c46Sdougm static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); 5105b6e0c46Sdougm static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, 5115b6e0c46Sdougm char *, char *, zprop_source_t, char *, char *, char *); 5125b6e0c46Sdougm static void (*_sa_update_sharetab_ts)(sa_handle_t); 51367331909Sdougm 51467331909Sdougm /* 51567331909Sdougm * _zfs_init_libshare() 51667331909Sdougm * 51767331909Sdougm * Find the libshare.so.1 entry points that we use here and save the 51867331909Sdougm * values to be used later. This is triggered by the runtime loader. 51967331909Sdougm * Make sure the correct ISA version is loaded. 52067331909Sdougm */ 5215b6e0c46Sdougm 52267331909Sdougm #pragma init(_zfs_init_libshare) 52367331909Sdougm static void 52467331909Sdougm _zfs_init_libshare(void) 52567331909Sdougm { 52667331909Sdougm void *libshare; 52767331909Sdougm char path[MAXPATHLEN]; 52867331909Sdougm char isa[MAXISALEN]; 52967331909Sdougm 53067331909Sdougm #if defined(_LP64) 53167331909Sdougm if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) 532d8689a57Sdougm isa[0] = '\0'; 53367331909Sdougm #else 53467331909Sdougm isa[0] = '\0'; 53567331909Sdougm #endif 53667331909Sdougm (void) snprintf(path, MAXPATHLEN, 537d8689a57Sdougm "/usr/lib/%s/libshare.so.1", isa); 53867331909Sdougm 53967331909Sdougm if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { 540d8689a57Sdougm _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); 541d8689a57Sdougm _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); 542d8689a57Sdougm _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) 543d8689a57Sdougm dlsym(libshare, "sa_find_share"); 544d8689a57Sdougm _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 545d8689a57Sdougm "sa_enable_share"); 546d8689a57Sdougm _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 547d8689a57Sdougm "sa_disable_share"); 548d8689a57Sdougm _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); 549d8689a57Sdougm _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) 550d8689a57Sdougm dlsym(libshare, "sa_parse_legacy_options"); 5515b6e0c46Sdougm _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) 5525b6e0c46Sdougm dlsym(libshare, "sa_needs_refresh"); 5535b6e0c46Sdougm _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) 5545b6e0c46Sdougm dlsym(libshare, "sa_get_zfs_handle"); 5555b6e0c46Sdougm _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, 5565b6e0c46Sdougm sa_share_t, char *, char *, zprop_source_t, char *, 5575b6e0c46Sdougm char *, char *))dlsym(libshare, "sa_zfs_process_share"); 5585b6e0c46Sdougm _sa_update_sharetab_ts = (void (*)(sa_handle_t)) 5595b6e0c46Sdougm dlsym(libshare, "sa_update_sharetab_ts"); 56057b448deSdougm if (_sa_init == NULL || _sa_fini == NULL || 56157b448deSdougm _sa_find_share == NULL || _sa_enable_share == NULL || 56257b448deSdougm _sa_disable_share == NULL || _sa_errorstr == NULL || 5635b6e0c46Sdougm _sa_parse_legacy_options == NULL || 5645b6e0c46Sdougm _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || 5655b6e0c46Sdougm _sa_zfs_process_share == NULL || 5665b6e0c46Sdougm _sa_update_sharetab_ts == NULL) { 56757b448deSdougm _sa_init = NULL; 56857b448deSdougm _sa_fini = NULL; 56957b448deSdougm _sa_disable_share = NULL; 57057b448deSdougm _sa_enable_share = NULL; 57157b448deSdougm _sa_errorstr = NULL; 57257b448deSdougm _sa_parse_legacy_options = NULL; 57357b448deSdougm (void) dlclose(libshare); 5745b6e0c46Sdougm _sa_needs_refresh = NULL; 5755b6e0c46Sdougm _sa_get_zfs_handle = NULL; 5765b6e0c46Sdougm _sa_zfs_process_share = NULL; 5775b6e0c46Sdougm _sa_update_sharetab_ts = NULL; 57857b448deSdougm } 57967331909Sdougm } 58067331909Sdougm } 58167331909Sdougm 58267331909Sdougm /* 58367331909Sdougm * zfs_init_libshare(zhandle, service) 58467331909Sdougm * 58567331909Sdougm * Initialize the libshare API if it hasn't already been initialized. 58667331909Sdougm * In all cases it returns 0 if it succeeded and an error if not. The 58767331909Sdougm * service value is which part(s) of the API to initialize and is a 58867331909Sdougm * direct map to the libshare sa_init(service) interface. 58967331909Sdougm */ 59067331909Sdougm int 59167331909Sdougm zfs_init_libshare(libzfs_handle_t *zhandle, int service) 59267331909Sdougm { 59367331909Sdougm int ret = SA_OK; 59467331909Sdougm 595d8689a57Sdougm if (_sa_init == NULL) 596d8689a57Sdougm ret = SA_CONFIG_ERR; 597d8689a57Sdougm 5985b6e0c46Sdougm if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) { 5995b6e0c46Sdougm /* 6005b6e0c46Sdougm * We had a cache miss. Most likely it is a new ZFS 6015b6e0c46Sdougm * dataset that was just created. We want to make sure 6025b6e0c46Sdougm * so check timestamps to see if a different process 6035b6e0c46Sdougm * has updated any of the configuration. If there was 6045b6e0c46Sdougm * some non-ZFS change, we need to re-initialize the 6055b6e0c46Sdougm * internal cache. 6065b6e0c46Sdougm */ 6075b6e0c46Sdougm zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS; 6085b6e0c46Sdougm if (_sa_needs_refresh != NULL && 6095b6e0c46Sdougm _sa_needs_refresh(zhandle->libzfs_sharehdl)) { 6105b6e0c46Sdougm zfs_uninit_libshare(zhandle); 6115b6e0c46Sdougm zhandle->libzfs_sharehdl = _sa_init(service); 6125b6e0c46Sdougm } 6135b6e0c46Sdougm } 6145b6e0c46Sdougm 615d8689a57Sdougm if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) 616d8689a57Sdougm zhandle->libzfs_sharehdl = _sa_init(service); 617d8689a57Sdougm 618d8689a57Sdougm if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) 619d8689a57Sdougm ret = SA_NO_MEMORY; 620d8689a57Sdougm 62167331909Sdougm return (ret); 62267331909Sdougm } 62367331909Sdougm 62467331909Sdougm /* 62567331909Sdougm * zfs_uninit_libshare(zhandle) 62667331909Sdougm * 62767331909Sdougm * Uninitialize the libshare API if it hasn't already been 62867331909Sdougm * uninitialized. It is OK to call multiple times. 62967331909Sdougm */ 63067331909Sdougm void 63167331909Sdougm zfs_uninit_libshare(libzfs_handle_t *zhandle) 63267331909Sdougm { 63367331909Sdougm if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { 634d8689a57Sdougm if (_sa_fini != NULL) 635d8689a57Sdougm _sa_fini(zhandle->libzfs_sharehdl); 636d8689a57Sdougm zhandle->libzfs_sharehdl = NULL; 63767331909Sdougm } 63867331909Sdougm } 63967331909Sdougm 64067331909Sdougm /* 64167331909Sdougm * zfs_parse_options(options, proto) 64267331909Sdougm * 64367331909Sdougm * Call the legacy parse interface to get the protocol specific 64467331909Sdougm * options using the NULL arg to indicate that this is a "parse" only. 64567331909Sdougm */ 64667331909Sdougm int 647da6c28aaSamw zfs_parse_options(char *options, zfs_share_proto_t proto) 64867331909Sdougm { 6493cb34c60Sahrens if (_sa_parse_legacy_options != NULL) { 6503cb34c60Sahrens return (_sa_parse_legacy_options(NULL, options, 6513cb34c60Sahrens proto_table[proto].p_name)); 6523cb34c60Sahrens } 6533cb34c60Sahrens return (SA_CONFIG_ERR); 65467331909Sdougm } 65567331909Sdougm 65667331909Sdougm /* 65767331909Sdougm * zfs_sa_find_share(handle, path) 65867331909Sdougm * 65967331909Sdougm * wrapper around sa_find_share to find a share path in the 66067331909Sdougm * configuration. 66167331909Sdougm */ 66267331909Sdougm static sa_share_t 66367331909Sdougm zfs_sa_find_share(sa_handle_t handle, char *path) 66467331909Sdougm { 66567331909Sdougm if (_sa_find_share != NULL) 666d8689a57Sdougm return (_sa_find_share(handle, path)); 66767331909Sdougm return (NULL); 66867331909Sdougm } 66967331909Sdougm 67067331909Sdougm /* 67167331909Sdougm * zfs_sa_enable_share(share, proto) 67267331909Sdougm * 67367331909Sdougm * Wrapper for sa_enable_share which enables a share for a specified 67467331909Sdougm * protocol. 67567331909Sdougm */ 67667331909Sdougm static int 67767331909Sdougm zfs_sa_enable_share(sa_share_t share, char *proto) 67867331909Sdougm { 67967331909Sdougm if (_sa_enable_share != NULL) 680d8689a57Sdougm return (_sa_enable_share(share, proto)); 68167331909Sdougm return (SA_CONFIG_ERR); 68267331909Sdougm } 68367331909Sdougm 68467331909Sdougm /* 68567331909Sdougm * zfs_sa_disable_share(share, proto) 68667331909Sdougm * 68767331909Sdougm * Wrapper for sa_enable_share which disables a share for a specified 68867331909Sdougm * protocol. 68967331909Sdougm */ 69067331909Sdougm static int 69167331909Sdougm zfs_sa_disable_share(sa_share_t share, char *proto) 69267331909Sdougm { 69367331909Sdougm if (_sa_disable_share != NULL) 694d8689a57Sdougm return (_sa_disable_share(share, proto)); 69567331909Sdougm return (SA_CONFIG_ERR); 69667331909Sdougm } 69767331909Sdougm 698fa9e4066Sahrens /* 699da6c28aaSamw * Share the given filesystem according to the options in the specified 700da6c28aaSamw * protocol specific properties (sharenfs, sharesmb). We rely 70167331909Sdougm * on "libshare" to the dirty work for us. 702fa9e4066Sahrens */ 703da6c28aaSamw static int 704da6c28aaSamw zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 705fa9e4066Sahrens { 706fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 707fa9e4066Sahrens char shareopts[ZFS_MAXPROPLEN]; 7085b6e0c46Sdougm char sourcestr[ZFS_MAXPROPLEN]; 70999653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 71067331909Sdougm sa_share_t share; 711da6c28aaSamw zfs_share_proto_t *curr_proto; 7125b6e0c46Sdougm zprop_source_t sourcetype; 71367331909Sdougm int ret; 714fa9e4066Sahrens 715e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 716fa9e4066Sahrens return (0); 717fa9e4066Sahrens 71867331909Sdougm if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { 719d8689a57Sdougm (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 720d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), 7215b6e0c46Sdougm zfs_get_name(zhp), _sa_errorstr != NULL ? 7225b6e0c46Sdougm _sa_errorstr(ret) : ""); 723d8689a57Sdougm return (-1); 72467331909Sdougm } 725da6c28aaSamw 726da6c28aaSamw for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { 727da6c28aaSamw /* 728da6c28aaSamw * Return success if there are no share options. 729da6c28aaSamw */ 730da6c28aaSamw if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, 7315b6e0c46Sdougm shareopts, sizeof (shareopts), &sourcetype, sourcestr, 7325b6e0c46Sdougm ZFS_MAXPROPLEN, B_FALSE) != 0 || 7335b6e0c46Sdougm strcmp(shareopts, "off") == 0) 734da6c28aaSamw continue; 735da6c28aaSamw 736da6c28aaSamw /* 737da6c28aaSamw * If the 'zoned' property is set, then zfs_is_mountable() 738da6c28aaSamw * will have already bailed out if we are in the global zone. 739da6c28aaSamw * But local zones cannot be NFS servers, so we ignore it for 740da6c28aaSamw * local zones as well. 741da6c28aaSamw */ 742da6c28aaSamw if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) 743da6c28aaSamw continue; 744da6c28aaSamw 745da6c28aaSamw share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); 7465b6e0c46Sdougm if (share == NULL) { 7475b6e0c46Sdougm /* 7485b6e0c46Sdougm * This may be a new file system that was just 7495b6e0c46Sdougm * created so isn't in the internal cache 7505b6e0c46Sdougm * (second time through). Rather than 7515b6e0c46Sdougm * reloading the entire configuration, we can 7525b6e0c46Sdougm * assume ZFS has done the checking and it is 7535b6e0c46Sdougm * safe to add this to the internal 7545b6e0c46Sdougm * configuration. 7555b6e0c46Sdougm */ 7565b6e0c46Sdougm if (_sa_zfs_process_share(hdl->libzfs_sharehdl, 7575b6e0c46Sdougm NULL, NULL, mountpoint, 7585b6e0c46Sdougm proto_table[*curr_proto].p_name, sourcetype, 7595b6e0c46Sdougm shareopts, sourcestr, zhp->zfs_name) != SA_OK) { 7605b6e0c46Sdougm (void) zfs_error_fmt(hdl, 7615b6e0c46Sdougm proto_table[*curr_proto].p_share_err, 7625b6e0c46Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 7635b6e0c46Sdougm zfs_get_name(zhp)); 7645b6e0c46Sdougm return (-1); 7655b6e0c46Sdougm } 7665b6e0c46Sdougm hdl->libzfs_shareflags |= ZFSSHARE_MISS; 7675b6e0c46Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, 7685b6e0c46Sdougm mountpoint); 7695b6e0c46Sdougm } 770da6c28aaSamw if (share != NULL) { 771da6c28aaSamw int err; 772da6c28aaSamw err = zfs_sa_enable_share(share, 773da6c28aaSamw proto_table[*curr_proto].p_name); 774da6c28aaSamw if (err != SA_OK) { 775da6c28aaSamw (void) zfs_error_fmt(hdl, 776da6c28aaSamw proto_table[*curr_proto].p_share_err, 777da6c28aaSamw dgettext(TEXT_DOMAIN, "cannot share '%s'"), 778da6c28aaSamw zfs_get_name(zhp)); 779da6c28aaSamw return (-1); 780da6c28aaSamw } 781da6c28aaSamw } else { 782da6c28aaSamw (void) zfs_error_fmt(hdl, 783da6c28aaSamw proto_table[*curr_proto].p_share_err, 784d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 785d8689a57Sdougm zfs_get_name(zhp)); 786d8689a57Sdougm return (-1); 787d8689a57Sdougm } 788fa9e4066Sahrens 789da6c28aaSamw } 790fa9e4066Sahrens return (0); 791fa9e4066Sahrens } 792fa9e4066Sahrens 793da6c28aaSamw 794da6c28aaSamw int 795da6c28aaSamw zfs_share_nfs(zfs_handle_t *zhp) 796da6c28aaSamw { 797da6c28aaSamw return (zfs_share_proto(zhp, nfs_only)); 798da6c28aaSamw } 799da6c28aaSamw 800da6c28aaSamw int 801da6c28aaSamw zfs_share_smb(zfs_handle_t *zhp) 802da6c28aaSamw { 803da6c28aaSamw return (zfs_share_proto(zhp, smb_only)); 804da6c28aaSamw } 805da6c28aaSamw 806da6c28aaSamw int 807da6c28aaSamw zfs_shareall(zfs_handle_t *zhp) 808da6c28aaSamw { 809da6c28aaSamw return (zfs_share_proto(zhp, share_all_proto)); 810da6c28aaSamw } 811da6c28aaSamw 8123bb79becSeschrock /* 8133bb79becSeschrock * Unshare a filesystem by mountpoint. 8143bb79becSeschrock */ 8153bb79becSeschrock static int 816da6c28aaSamw unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, 817da6c28aaSamw zfs_share_proto_t proto) 8183bb79becSeschrock { 81967331909Sdougm sa_share_t share; 82067331909Sdougm int err; 82167331909Sdougm char *mntpt; 8223bb79becSeschrock /* 82367331909Sdougm * Mountpoint could get trashed if libshare calls getmntany 824ebedde84SEric Taylor * which it does during API initialization, so strdup the 82567331909Sdougm * value. 8263bb79becSeschrock */ 82767331909Sdougm mntpt = zfs_strdup(hdl, mountpoint); 8283bb79becSeschrock 82967331909Sdougm /* make sure libshare initialized */ 83067331909Sdougm if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { 83167331909Sdougm free(mntpt); /* don't need the copy anymore */ 83267331909Sdougm return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 833d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 834d8689a57Sdougm name, _sa_errorstr(err))); 83567331909Sdougm } 8363bb79becSeschrock 83767331909Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); 83867331909Sdougm free(mntpt); /* don't need the copy anymore */ 8393bb79becSeschrock 84067331909Sdougm if (share != NULL) { 841da6c28aaSamw err = zfs_sa_disable_share(share, proto_table[proto].p_name); 84267331909Sdougm if (err != SA_OK) { 843d8689a57Sdougm return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 844d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 845d8689a57Sdougm name, _sa_errorstr(err))); 84667331909Sdougm } 84767331909Sdougm } else { 848ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 849d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), 850d8689a57Sdougm name)); 8513bb79becSeschrock } 8523bb79becSeschrock return (0); 8533bb79becSeschrock } 8543bb79becSeschrock 855fa9e4066Sahrens /* 856fa9e4066Sahrens * Unshare the given filesystem. 857fa9e4066Sahrens */ 858fa9e4066Sahrens int 859da6c28aaSamw zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, 860da6c28aaSamw zfs_share_proto_t *proto) 861fa9e4066Sahrens { 862ebedde84SEric Taylor libzfs_handle_t *hdl = zhp->zfs_hdl; 863ebedde84SEric Taylor struct mnttab entry; 86467331909Sdougm char *mntpt = NULL; 865fa9e4066Sahrens 866fa9e4066Sahrens /* check to see if need to unmount the filesystem */ 86799653d4eSeschrock rewind(zhp->zfs_hdl->libzfs_mnttab); 868d8689a57Sdougm if (mountpoint != NULL) 869ebedde84SEric Taylor mountpoint = mntpt = zfs_strdup(hdl, mountpoint); 870d8689a57Sdougm 871fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 872ebedde84SEric Taylor libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { 873da6c28aaSamw zfs_share_proto_t *curr_proto; 874fa9e4066Sahrens 875fa9e4066Sahrens if (mountpoint == NULL) 876da6c28aaSamw mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); 877fa9e4066Sahrens 878da6c28aaSamw for (curr_proto = proto; *curr_proto != PROTO_END; 879da6c28aaSamw curr_proto++) { 880da6c28aaSamw 881ebedde84SEric Taylor if (is_shared(hdl, mntpt, *curr_proto) && 882ebedde84SEric Taylor unshare_one(hdl, zhp->zfs_name, 883da6c28aaSamw mntpt, *curr_proto) != 0) { 884da6c28aaSamw if (mntpt != NULL) 885da6c28aaSamw free(mntpt); 886da6c28aaSamw return (-1); 887da6c28aaSamw } 88867331909Sdougm } 889fa9e4066Sahrens } 89067331909Sdougm if (mntpt != NULL) 891d8689a57Sdougm free(mntpt); 892fa9e4066Sahrens 893fa9e4066Sahrens return (0); 894fa9e4066Sahrens } 895fa9e4066Sahrens 896da6c28aaSamw int 897da6c28aaSamw zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) 898da6c28aaSamw { 899da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); 900da6c28aaSamw } 901da6c28aaSamw 902da6c28aaSamw int 903da6c28aaSamw zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) 904da6c28aaSamw { 905da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, smb_only)); 906da6c28aaSamw } 907da6c28aaSamw 908fa9e4066Sahrens /* 909da6c28aaSamw * Same as zfs_unmountall(), but for NFS and SMB unshares. 910fa9e4066Sahrens */ 911fa9e4066Sahrens int 912da6c28aaSamw zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 913fa9e4066Sahrens { 914fa9e4066Sahrens prop_changelist_t *clp; 915fa9e4066Sahrens int ret; 916fa9e4066Sahrens 9170069fd67STim Haley clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); 918fa9e4066Sahrens if (clp == NULL) 919fa9e4066Sahrens return (-1); 920fa9e4066Sahrens 921da6c28aaSamw ret = changelist_unshare(clp, proto); 922fa9e4066Sahrens changelist_free(clp); 923fa9e4066Sahrens 924fa9e4066Sahrens return (ret); 925fa9e4066Sahrens } 926fa9e4066Sahrens 927da6c28aaSamw int 928da6c28aaSamw zfs_unshareall_nfs(zfs_handle_t *zhp) 929da6c28aaSamw { 930da6c28aaSamw return (zfs_unshareall_proto(zhp, nfs_only)); 931da6c28aaSamw } 932da6c28aaSamw 933da6c28aaSamw int 934da6c28aaSamw zfs_unshareall_smb(zfs_handle_t *zhp) 935da6c28aaSamw { 936da6c28aaSamw return (zfs_unshareall_proto(zhp, smb_only)); 937da6c28aaSamw } 938da6c28aaSamw 939da6c28aaSamw int 940da6c28aaSamw zfs_unshareall(zfs_handle_t *zhp) 941da6c28aaSamw { 942da6c28aaSamw return (zfs_unshareall_proto(zhp, share_all_proto)); 943da6c28aaSamw } 944da6c28aaSamw 945da6c28aaSamw int 946da6c28aaSamw zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) 947da6c28aaSamw { 948da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); 949da6c28aaSamw } 950da6c28aaSamw 951fa9e4066Sahrens /* 952fa9e4066Sahrens * Remove the mountpoint associated with the current dataset, if necessary. 953fa9e4066Sahrens * We only remove the underlying directory if: 954fa9e4066Sahrens * 955fa9e4066Sahrens * - The mountpoint is not 'none' or 'legacy' 956fa9e4066Sahrens * - The mountpoint is non-empty 957fa9e4066Sahrens * - The mountpoint is the default or inherited 958fa9e4066Sahrens * - The 'zoned' property is set, or we're in a local zone 959fa9e4066Sahrens * 960fa9e4066Sahrens * Any other directories we leave alone. 961fa9e4066Sahrens */ 962fa9e4066Sahrens void 963fa9e4066Sahrens remove_mountpoint(zfs_handle_t *zhp) 964fa9e4066Sahrens { 965fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 966990b4856Slling zprop_source_t source; 967fa9e4066Sahrens 968e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), 969e9dbad6fSeschrock &source)) 970fa9e4066Sahrens return; 971fa9e4066Sahrens 972990b4856Slling if (source == ZPROP_SRC_DEFAULT || 973990b4856Slling source == ZPROP_SRC_INHERITED) { 974fa9e4066Sahrens /* 975fa9e4066Sahrens * Try to remove the directory, silently ignoring any errors. 976fa9e4066Sahrens * The filesystem may have since been removed or moved around, 977e9dbad6fSeschrock * and this error isn't really useful to the administrator in 978e9dbad6fSeschrock * any way. 979fa9e4066Sahrens */ 980fa9e4066Sahrens (void) rmdir(mountpoint); 981fa9e4066Sahrens } 982fa9e4066Sahrens } 9833bb79becSeschrock 9849d9a58e3SEric Taylor void 9859d9a58e3SEric Taylor libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp) 9869d9a58e3SEric Taylor { 9879d9a58e3SEric Taylor if (cbp->cb_alloc == cbp->cb_used) { 9889d9a58e3SEric Taylor size_t newsz; 9899d9a58e3SEric Taylor void *ptr; 9909d9a58e3SEric Taylor 9919d9a58e3SEric Taylor newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64; 9929d9a58e3SEric Taylor ptr = zfs_realloc(zhp->zfs_hdl, 9939d9a58e3SEric Taylor cbp->cb_handles, cbp->cb_alloc * sizeof (void *), 9949d9a58e3SEric Taylor newsz * sizeof (void *)); 9959d9a58e3SEric Taylor cbp->cb_handles = ptr; 9969d9a58e3SEric Taylor cbp->cb_alloc = newsz; 9979d9a58e3SEric Taylor } 9989d9a58e3SEric Taylor cbp->cb_handles[cbp->cb_used++] = zhp; 9999d9a58e3SEric Taylor } 10003bb79becSeschrock 10013bb79becSeschrock static int 10023bb79becSeschrock mount_cb(zfs_handle_t *zhp, void *data) 10033bb79becSeschrock { 10049d9a58e3SEric Taylor get_all_cb_t *cbp = data; 10053bb79becSeschrock 10069d9a58e3SEric Taylor if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) { 10073bb79becSeschrock zfs_close(zhp); 10083bb79becSeschrock return (0); 10093bb79becSeschrock } 10103bb79becSeschrock 1011a227b7f4Shs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { 1012a227b7f4Shs zfs_close(zhp); 1013a227b7f4Shs return (0); 1014a227b7f4Shs } 1015a227b7f4Shs 10169d9a58e3SEric Taylor libzfs_add_handle(cbp, zhp); 10179d9a58e3SEric Taylor if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) { 10189d9a58e3SEric Taylor zfs_close(zhp); 10199d9a58e3SEric Taylor return (-1); 10203bb79becSeschrock } 10219d9a58e3SEric Taylor return (0); 10223bb79becSeschrock } 10233bb79becSeschrock 10249d9a58e3SEric Taylor int 10259d9a58e3SEric Taylor libzfs_dataset_cmp(const void *a, const void *b) 10263bb79becSeschrock { 10273bb79becSeschrock zfs_handle_t **za = (zfs_handle_t **)a; 10283bb79becSeschrock zfs_handle_t **zb = (zfs_handle_t **)b; 10293bb79becSeschrock char mounta[MAXPATHLEN]; 10303bb79becSeschrock char mountb[MAXPATHLEN]; 1031f3861e1aSahl boolean_t gota, gotb; 1032f3861e1aSahl 1033f3861e1aSahl if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) 1034f3861e1aSahl verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, 1035f3861e1aSahl sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 1036f3861e1aSahl if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) 1037f3861e1aSahl verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, 1038f3861e1aSahl sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 1039f3861e1aSahl 1040f3861e1aSahl if (gota && gotb) 1041f3861e1aSahl return (strcmp(mounta, mountb)); 10423bb79becSeschrock 1043f3861e1aSahl if (gota) 1044f3861e1aSahl return (-1); 1045f3861e1aSahl if (gotb) 1046f3861e1aSahl return (1); 10473bb79becSeschrock 1048f3861e1aSahl return (strcmp(zfs_get_name(a), zfs_get_name(b))); 10493bb79becSeschrock } 10503bb79becSeschrock 1051f3861e1aSahl /* 1052f3861e1aSahl * Mount and share all datasets within the given pool. This assumes that no 1053f3861e1aSahl * datasets within the pool are currently mounted. Because users can create 1054f3861e1aSahl * complicated nested hierarchies of mountpoints, we first gather all the 1055f3861e1aSahl * datasets and mountpoints within the pool, and sort them by mountpoint. Once 1056f3861e1aSahl * we have the list of all filesystems, we iterate over them in order and mount 1057f3861e1aSahl * and/or share each one. 1058f3861e1aSahl */ 1059f3861e1aSahl #pragma weak zpool_mount_datasets = zpool_enable_datasets 10603bb79becSeschrock int 1061f3861e1aSahl zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) 10623bb79becSeschrock { 10639d9a58e3SEric Taylor get_all_cb_t cb = { 0 }; 10643bb79becSeschrock libzfs_handle_t *hdl = zhp->zpool_hdl; 10653bb79becSeschrock zfs_handle_t *zfsp; 10663bb79becSeschrock int i, ret = -1; 106767331909Sdougm int *good; 10683bb79becSeschrock 10693bb79becSeschrock /* 1070d87468daSrm * Gather all non-snap datasets within the pool. 10713bb79becSeschrock */ 1072990b4856Slling if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) 10733bb79becSeschrock goto out; 10743bb79becSeschrock 10759d9a58e3SEric Taylor libzfs_add_handle(&cb, zfsp); 1076d87468daSrm if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) 10773bb79becSeschrock goto out; 10783bb79becSeschrock /* 10793bb79becSeschrock * Sort the datasets by mountpoint. 10803bb79becSeschrock */ 10819d9a58e3SEric Taylor qsort(cb.cb_handles, cb.cb_used, sizeof (void *), 10829d9a58e3SEric Taylor libzfs_dataset_cmp); 10833bb79becSeschrock 10843bb79becSeschrock /* 108567331909Sdougm * And mount all the datasets, keeping track of which ones 10866e77af0aSDavid Pacheco * succeeded or failed. 10873bb79becSeschrock */ 10886e77af0aSDavid Pacheco if ((good = zfs_alloc(zhp->zpool_hdl, 10896e77af0aSDavid Pacheco cb.cb_used * sizeof (int))) == NULL) 10906e77af0aSDavid Pacheco goto out; 10916e77af0aSDavid Pacheco 10923bb79becSeschrock ret = 0; 10933bb79becSeschrock for (i = 0; i < cb.cb_used; i++) { 10949d9a58e3SEric Taylor if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0) 10953bb79becSeschrock ret = -1; 1096d8689a57Sdougm else 109767331909Sdougm good[i] = 1; 10983bb79becSeschrock } 10995b6e0c46Sdougm 110067331909Sdougm /* 110167331909Sdougm * Then share all the ones that need to be shared. This needs 110267331909Sdougm * to be a separate pass in order to avoid excessive reloading 110367331909Sdougm * of the configuration. Good should never be NULL since 110467331909Sdougm * zfs_alloc is supposed to exit if memory isn't available. 110567331909Sdougm */ 110667331909Sdougm for (i = 0; i < cb.cb_used; i++) { 11079d9a58e3SEric Taylor if (good[i] && zfs_share(cb.cb_handles[i]) != 0) 110867331909Sdougm ret = -1; 110967331909Sdougm } 111067331909Sdougm 111167331909Sdougm free(good); 11123bb79becSeschrock 11133bb79becSeschrock out: 11143bb79becSeschrock for (i = 0; i < cb.cb_used; i++) 11159d9a58e3SEric Taylor zfs_close(cb.cb_handles[i]); 11169d9a58e3SEric Taylor free(cb.cb_handles); 11173bb79becSeschrock 11183bb79becSeschrock return (ret); 11193bb79becSeschrock } 11203bb79becSeschrock 11213bb79becSeschrock static int 11223bb79becSeschrock mountpoint_compare(const void *a, const void *b) 11233bb79becSeschrock { 11243bb79becSeschrock const char *mounta = *((char **)a); 11253bb79becSeschrock const char *mountb = *((char **)b); 11263bb79becSeschrock 11273bb79becSeschrock return (strcmp(mountb, mounta)); 11283bb79becSeschrock } 11293bb79becSeschrock 1130681d9761SEric Taylor /* alias for 2002/240 */ 1131681d9761SEric Taylor #pragma weak zpool_unmount_datasets = zpool_disable_datasets 1132f3861e1aSahl /* 1133f3861e1aSahl * Unshare and unmount all datasets within the given pool. We don't want to 1134f3861e1aSahl * rely on traversing the DSL to discover the filesystems within the pool, 1135f3861e1aSahl * because this may be expensive (if not all of them are mounted), and can fail 1136f3861e1aSahl * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and 1137f3861e1aSahl * gather all the filesystems that are currently mounted. 1138f3861e1aSahl */ 11393bb79becSeschrock int 1140f3861e1aSahl zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) 11413bb79becSeschrock { 11423bb79becSeschrock int used, alloc; 11433bb79becSeschrock struct mnttab entry; 11443bb79becSeschrock size_t namelen; 11453bb79becSeschrock char **mountpoints = NULL; 11463bb79becSeschrock zfs_handle_t **datasets = NULL; 11473bb79becSeschrock libzfs_handle_t *hdl = zhp->zpool_hdl; 11483bb79becSeschrock int i; 11493bb79becSeschrock int ret = -1; 11503bb79becSeschrock int flags = (force ? MS_FORCE : 0); 11513bb79becSeschrock 11523bb79becSeschrock namelen = strlen(zhp->zpool_name); 11533bb79becSeschrock 11543bb79becSeschrock rewind(hdl->libzfs_mnttab); 11553bb79becSeschrock used = alloc = 0; 11563bb79becSeschrock while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 11573bb79becSeschrock /* 11583bb79becSeschrock * Ignore non-ZFS entries. 11593bb79becSeschrock */ 11603bb79becSeschrock if (entry.mnt_fstype == NULL || 11613bb79becSeschrock strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 11623bb79becSeschrock continue; 11633bb79becSeschrock 11643bb79becSeschrock /* 11653bb79becSeschrock * Ignore filesystems not within this pool. 11663bb79becSeschrock */ 11673bb79becSeschrock if (entry.mnt_mountp == NULL || 11683bb79becSeschrock strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || 11693bb79becSeschrock (entry.mnt_special[namelen] != '/' && 11703bb79becSeschrock entry.mnt_special[namelen] != '\0')) 11713bb79becSeschrock continue; 11723bb79becSeschrock 11733bb79becSeschrock /* 11743bb79becSeschrock * At this point we've found a filesystem within our pool. Add 11753bb79becSeschrock * it to our growing list. 11763bb79becSeschrock */ 11773bb79becSeschrock if (used == alloc) { 11783bb79becSeschrock if (alloc == 0) { 11793bb79becSeschrock if ((mountpoints = zfs_alloc(hdl, 11803bb79becSeschrock 8 * sizeof (void *))) == NULL) 11813bb79becSeschrock goto out; 11823bb79becSeschrock 11833bb79becSeschrock if ((datasets = zfs_alloc(hdl, 11843bb79becSeschrock 8 * sizeof (void *))) == NULL) 11853bb79becSeschrock goto out; 11863bb79becSeschrock 11873bb79becSeschrock alloc = 8; 11883bb79becSeschrock } else { 1189e9dbad6fSeschrock void *ptr; 11903bb79becSeschrock 1191e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, mountpoints, 1192e9dbad6fSeschrock alloc * sizeof (void *), 11933bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 11943bb79becSeschrock goto out; 1195e9dbad6fSeschrock mountpoints = ptr; 11963bb79becSeschrock 1197e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, datasets, 1198e9dbad6fSeschrock alloc * sizeof (void *), 11993bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 12003bb79becSeschrock goto out; 1201e9dbad6fSeschrock datasets = ptr; 12023bb79becSeschrock 12033bb79becSeschrock alloc *= 2; 12043bb79becSeschrock } 12053bb79becSeschrock } 12063bb79becSeschrock 12073bb79becSeschrock if ((mountpoints[used] = zfs_strdup(hdl, 12083bb79becSeschrock entry.mnt_mountp)) == NULL) 12093bb79becSeschrock goto out; 12103bb79becSeschrock 12113bb79becSeschrock /* 12123bb79becSeschrock * This is allowed to fail, in case there is some I/O error. It 12133bb79becSeschrock * is only used to determine if we need to remove the underlying 12143bb79becSeschrock * mountpoint, so failure is not fatal. 12153bb79becSeschrock */ 12163bb79becSeschrock datasets[used] = make_dataset_handle(hdl, entry.mnt_special); 12173bb79becSeschrock 12183bb79becSeschrock used++; 12193bb79becSeschrock } 12203bb79becSeschrock 12213bb79becSeschrock /* 12223bb79becSeschrock * At this point, we have the entire list of filesystems, so sort it by 12233bb79becSeschrock * mountpoint. 12243bb79becSeschrock */ 12253bb79becSeschrock qsort(mountpoints, used, sizeof (char *), mountpoint_compare); 12263bb79becSeschrock 12273bb79becSeschrock /* 12283bb79becSeschrock * Walk through and first unshare everything. 12293bb79becSeschrock */ 12303bb79becSeschrock for (i = 0; i < used; i++) { 1231da6c28aaSamw zfs_share_proto_t *curr_proto; 1232da6c28aaSamw for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 1233da6c28aaSamw curr_proto++) { 1234da6c28aaSamw if (is_shared(hdl, mountpoints[i], *curr_proto) && 1235da6c28aaSamw unshare_one(hdl, mountpoints[i], 1236da6c28aaSamw mountpoints[i], *curr_proto) != 0) 1237da6c28aaSamw goto out; 1238da6c28aaSamw } 12393bb79becSeschrock } 12403bb79becSeschrock 12413bb79becSeschrock /* 12423bb79becSeschrock * Now unmount everything, removing the underlying directories as 12433bb79becSeschrock * appropriate. 12443bb79becSeschrock */ 12453bb79becSeschrock for (i = 0; i < used; i++) { 12463bb79becSeschrock if (unmount_one(hdl, mountpoints[i], flags) != 0) 12473bb79becSeschrock goto out; 1248e9dbad6fSeschrock } 12493bb79becSeschrock 1250e9dbad6fSeschrock for (i = 0; i < used; i++) { 12513bb79becSeschrock if (datasets[i]) 12523bb79becSeschrock remove_mountpoint(datasets[i]); 12533bb79becSeschrock } 12543bb79becSeschrock 12553bb79becSeschrock ret = 0; 12563bb79becSeschrock out: 12573bb79becSeschrock for (i = 0; i < used; i++) { 12583bb79becSeschrock if (datasets[i]) 12593bb79becSeschrock zfs_close(datasets[i]); 12603bb79becSeschrock free(mountpoints[i]); 12613bb79becSeschrock } 12623bb79becSeschrock free(datasets); 12633bb79becSeschrock free(mountpoints); 12643bb79becSeschrock 12653bb79becSeschrock return (ret); 12663bb79becSeschrock } 1267