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 /* 2311d2789dSgw * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24fa9e4066Sahrens * Use is subject to license terms. 25fa9e4066Sahrens */ 26fa9e4066Sahrens 27fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 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() 48f3861e1aSahl * zfs_share_nfs() 49f3861e1aSahl * zfs_unshare_nfs() 50f3861e1aSahl * zfs_unshareall_nfs() 51f3861e1aSahl * zfs_is_shared_iscsi() 52f3861e1aSahl * zfs_share_iscsi() 53f3861e1aSahl * zfs_unshare_iscsi() 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/mnttab.h> 74fa9e4066Sahrens #include <sys/mount.h> 75fa9e4066Sahrens #include <sys/stat.h> 76fa9e4066Sahrens 77fa9e4066Sahrens #include <libzfs.h> 78fa9e4066Sahrens 79fa9e4066Sahrens #include "libzfs_impl.h" 80fa9e4066Sahrens 8167331909Sdougm #include <libshare.h> 8267331909Sdougm #include <sys/systeminfo.h> 8367331909Sdougm #define MAXISALEN 257 /* based on sysinfo(2) man page */ 8467331909Sdougm 85d8d59944Sahl static int (*iscsitgt_zfs_share)(const char *); 86d8d59944Sahl static int (*iscsitgt_zfs_unshare)(const char *); 87d8d59944Sahl static int (*iscsitgt_zfs_is_shared)(const char *); 88ecd6cf80Smarks static int (*iscsitgt_svc_online)(); 89d8d59944Sahl 90d8d59944Sahl #pragma init(zfs_iscsi_init) 91d8d59944Sahl static void 92d8d59944Sahl zfs_iscsi_init(void) 93d8d59944Sahl { 94d8d59944Sahl void *libiscsitgt; 95d8d59944Sahl 96d8d59944Sahl if ((libiscsitgt = dlopen("/lib/libiscsitgt.so.1", 97d8d59944Sahl RTLD_LAZY | RTLD_GLOBAL)) == NULL || 98d8d59944Sahl (iscsitgt_zfs_share = (int (*)(const char *))dlsym(libiscsitgt, 99d8d59944Sahl "iscsitgt_zfs_share")) == NULL || 100d8d59944Sahl (iscsitgt_zfs_unshare = (int (*)(const char *))dlsym(libiscsitgt, 101d8d59944Sahl "iscsitgt_zfs_unshare")) == NULL || 102d8d59944Sahl (iscsitgt_zfs_is_shared = (int (*)(const char *))dlsym(libiscsitgt, 103ecd6cf80Smarks "iscsitgt_zfs_is_shared")) == NULL || 104ecd6cf80Smarks (iscsitgt_svc_online = (int (*)(const char *))dlsym(libiscsitgt, 105ecd6cf80Smarks "iscsitgt_svc_online")) == NULL) { 106d8d59944Sahl iscsitgt_zfs_share = NULL; 107d8d59944Sahl iscsitgt_zfs_unshare = NULL; 108d8d59944Sahl iscsitgt_zfs_is_shared = NULL; 109ecd6cf80Smarks iscsitgt_svc_online = NULL; 110d8d59944Sahl } 111d8d59944Sahl } 112d8d59944Sahl 113fa9e4066Sahrens /* 11499653d4eSeschrock * Search the sharetab for the given mountpoint, returning true if it is found. 115fa9e4066Sahrens */ 11699653d4eSeschrock static boolean_t 11799653d4eSeschrock is_shared(libzfs_handle_t *hdl, const char *mountpoint) 118fa9e4066Sahrens { 119fa9e4066Sahrens char buf[MAXPATHLEN], *tab; 120fa9e4066Sahrens 12199653d4eSeschrock if (hdl->libzfs_sharetab == NULL) 122fa9e4066Sahrens return (0); 123fa9e4066Sahrens 12499653d4eSeschrock (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); 125fa9e4066Sahrens 12699653d4eSeschrock while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { 127fa9e4066Sahrens 128fa9e4066Sahrens /* the mountpoint is the first entry on each line */ 129fa9e4066Sahrens if ((tab = strchr(buf, '\t')) != NULL) { 130fa9e4066Sahrens *tab = '\0'; 131fa9e4066Sahrens if (strcmp(buf, mountpoint) == 0) 13299653d4eSeschrock return (B_TRUE); 133fa9e4066Sahrens } 134fa9e4066Sahrens } 135fa9e4066Sahrens 13699653d4eSeschrock return (B_FALSE); 137fa9e4066Sahrens } 138fa9e4066Sahrens 139fa9e4066Sahrens /* 14099653d4eSeschrock * Returns true if the specified directory is empty. If we can't open the 14199653d4eSeschrock * directory at all, return true so that the mount can fail with a more 142fa9e4066Sahrens * informative error message. 143fa9e4066Sahrens */ 14499653d4eSeschrock static boolean_t 145fa9e4066Sahrens dir_is_empty(const char *dirname) 146fa9e4066Sahrens { 147fa9e4066Sahrens DIR *dirp; 148fa9e4066Sahrens struct dirent64 *dp; 149fa9e4066Sahrens 150fa9e4066Sahrens if ((dirp = opendir(dirname)) == NULL) 15199653d4eSeschrock return (B_TRUE); 152fa9e4066Sahrens 153fa9e4066Sahrens while ((dp = readdir64(dirp)) != NULL) { 154fa9e4066Sahrens 155fa9e4066Sahrens if (strcmp(dp->d_name, ".") == 0 || 156fa9e4066Sahrens strcmp(dp->d_name, "..") == 0) 157fa9e4066Sahrens continue; 158fa9e4066Sahrens 159fa9e4066Sahrens (void) closedir(dirp); 16099653d4eSeschrock return (B_FALSE); 161fa9e4066Sahrens } 162fa9e4066Sahrens 163fa9e4066Sahrens (void) closedir(dirp); 16499653d4eSeschrock return (B_TRUE); 165fa9e4066Sahrens } 166fa9e4066Sahrens 167fa9e4066Sahrens /* 168fa9e4066Sahrens * Checks to see if the mount is active. If the filesystem is mounted, we fill 169fa9e4066Sahrens * in 'where' with the current mountpoint, and return 1. Otherwise, we return 170fa9e4066Sahrens * 0. 171fa9e4066Sahrens */ 17299653d4eSeschrock boolean_t 17355434c77Sek is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) 174fa9e4066Sahrens { 175fa9e4066Sahrens struct mnttab search = { 0 }, entry; 176fa9e4066Sahrens 177fa9e4066Sahrens /* 178fa9e4066Sahrens * Search for the entry in /etc/mnttab. We don't bother getting the 179fa9e4066Sahrens * mountpoint, as we can just search for the special device. This will 180fa9e4066Sahrens * also let us find mounts when the mountpoint is 'legacy'. 181fa9e4066Sahrens */ 18255434c77Sek search.mnt_special = (char *)special; 18396dedd18Snd search.mnt_fstype = MNTTYPE_ZFS; 184fa9e4066Sahrens 18555434c77Sek rewind(zfs_hdl->libzfs_mnttab); 18655434c77Sek if (getmntany(zfs_hdl->libzfs_mnttab, &entry, &search) != 0) 18799653d4eSeschrock return (B_FALSE); 188fa9e4066Sahrens 189fa9e4066Sahrens if (where != NULL) 19055434c77Sek *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); 191fa9e4066Sahrens 19299653d4eSeschrock return (B_TRUE); 193fa9e4066Sahrens } 194fa9e4066Sahrens 19555434c77Sek boolean_t 19655434c77Sek zfs_is_mounted(zfs_handle_t *zhp, char **where) 19755434c77Sek { 19855434c77Sek return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); 19955434c77Sek } 20055434c77Sek 201e9dbad6fSeschrock /* 202e9dbad6fSeschrock * Returns true if the given dataset is mountable, false otherwise. Returns the 203e9dbad6fSeschrock * mountpoint in 'buf'. 204e9dbad6fSeschrock */ 205e9dbad6fSeschrock static boolean_t 206e9dbad6fSeschrock zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, 207*990b4856Slling zprop_source_t *source) 208e9dbad6fSeschrock { 209e9dbad6fSeschrock char sourceloc[ZFS_MAXNAMELEN]; 210*990b4856Slling zprop_source_t sourcetype; 211e9dbad6fSeschrock 212e9dbad6fSeschrock if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) 213e9dbad6fSeschrock return (B_FALSE); 214e9dbad6fSeschrock 215e9dbad6fSeschrock verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, 216e9dbad6fSeschrock &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); 217e9dbad6fSeschrock 218e9dbad6fSeschrock if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || 219e9dbad6fSeschrock strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) 220e9dbad6fSeschrock return (B_FALSE); 221e9dbad6fSeschrock 222e9dbad6fSeschrock if (!zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT)) 223e9dbad6fSeschrock return (B_FALSE); 224e9dbad6fSeschrock 225e9dbad6fSeschrock if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && 226e9dbad6fSeschrock getzoneid() == GLOBAL_ZONEID) 227e9dbad6fSeschrock return (B_FALSE); 228e9dbad6fSeschrock 229e9dbad6fSeschrock if (source) 230e9dbad6fSeschrock *source = sourcetype; 231e9dbad6fSeschrock 232e9dbad6fSeschrock return (B_TRUE); 233e9dbad6fSeschrock } 234e9dbad6fSeschrock 235fa9e4066Sahrens /* 236fa9e4066Sahrens * Mount the given filesystem. 237fa9e4066Sahrens */ 238fa9e4066Sahrens int 239fa9e4066Sahrens zfs_mount(zfs_handle_t *zhp, const char *options, int flags) 240fa9e4066Sahrens { 241fa9e4066Sahrens struct stat buf; 242fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 243fa9e4066Sahrens char mntopts[MNT_LINE_MAX]; 24499653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 245fa9e4066Sahrens 246fa9e4066Sahrens if (options == NULL) 247fa9e4066Sahrens mntopts[0] = '\0'; 248fa9e4066Sahrens else 249fa9e4066Sahrens (void) strlcpy(mntopts, options, sizeof (mntopts)); 250fa9e4066Sahrens 251e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 25299653d4eSeschrock return (0); 253fa9e4066Sahrens 254fa9e4066Sahrens /* Create the directory if it doesn't already exist */ 255fa9e4066Sahrens if (lstat(mountpoint, &buf) != 0) { 256fa9e4066Sahrens if (mkdirp(mountpoint, 0755) != 0) { 25799653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 25899653d4eSeschrock "failed to create mountpoint")); 259ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 26099653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 26199653d4eSeschrock mountpoint)); 262fa9e4066Sahrens } 263fa9e4066Sahrens } 264fa9e4066Sahrens 265fa9e4066Sahrens /* 266fa9e4066Sahrens * Determine if the mountpoint is empty. If so, refuse to perform the 267fa9e4066Sahrens * mount. We don't perform this check if MS_OVERLAY is specified, which 268fa9e4066Sahrens * would defeat the point. We also avoid this check if 'remount' is 269fa9e4066Sahrens * specified. 270fa9e4066Sahrens */ 271fa9e4066Sahrens if ((flags & MS_OVERLAY) == 0 && 272fa9e4066Sahrens strstr(mntopts, MNTOPT_REMOUNT) == NULL && 273fa9e4066Sahrens !dir_is_empty(mountpoint)) { 27499653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 27599653d4eSeschrock "directory is not empty")); 276ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 27799653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); 278fa9e4066Sahrens } 279fa9e4066Sahrens 280fa9e4066Sahrens /* perform the mount */ 281fa9e4066Sahrens if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, 282fa9e4066Sahrens MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { 283fa9e4066Sahrens /* 284fa9e4066Sahrens * Generic errors are nasty, but there are just way too many 285fa9e4066Sahrens * from mount(), and they're well-understood. We pick a few 286fa9e4066Sahrens * common ones to improve upon. 287fa9e4066Sahrens */ 288d8689a57Sdougm if (errno == EBUSY) { 28999653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 29099653d4eSeschrock "mountpoint or dataset is busy")); 291ecd6cf80Smarks } else if (errno == EPERM) { 292ecd6cf80Smarks zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 293ecd6cf80Smarks "Insufficient privileges")); 294d8689a57Sdougm } else { 29599653d4eSeschrock zfs_error_aux(hdl, strerror(errno)); 296d8689a57Sdougm } 29799653d4eSeschrock 298ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 29999653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 30099653d4eSeschrock zhp->zfs_name)); 301fa9e4066Sahrens } 302fa9e4066Sahrens 303fa9e4066Sahrens return (0); 304fa9e4066Sahrens } 305fa9e4066Sahrens 3063bb79becSeschrock /* 3073bb79becSeschrock * Unmount a single filesystem. 3083bb79becSeschrock */ 3093bb79becSeschrock static int 3103bb79becSeschrock unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) 3113bb79becSeschrock { 3123bb79becSeschrock if (umount2(mountpoint, flags) != 0) { 3133bb79becSeschrock zfs_error_aux(hdl, strerror(errno)); 314ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, 3153bb79becSeschrock dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), 3163bb79becSeschrock mountpoint)); 3173bb79becSeschrock } 3183bb79becSeschrock 3193bb79becSeschrock return (0); 3203bb79becSeschrock } 3213bb79becSeschrock 322fa9e4066Sahrens /* 323fa9e4066Sahrens * Unmount the given filesystem. 324fa9e4066Sahrens */ 325fa9e4066Sahrens int 326fa9e4066Sahrens zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) 327fa9e4066Sahrens { 328fa9e4066Sahrens struct mnttab search = { 0 }, entry; 32967331909Sdougm char *mntpt = NULL; 330fa9e4066Sahrens 331fa9e4066Sahrens /* check to see if need to unmount the filesystem */ 3323bb79becSeschrock search.mnt_special = zhp->zfs_name; 33396dedd18Snd search.mnt_fstype = MNTTYPE_ZFS; 33499653d4eSeschrock rewind(zhp->zfs_hdl->libzfs_mnttab); 335fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 33699653d4eSeschrock getmntany(zhp->zfs_hdl->libzfs_mnttab, &entry, &search) == 0)) { 337fa9e4066Sahrens 33867331909Sdougm /* 33967331909Sdougm * mountpoint may have come from a call to 34067331909Sdougm * getmnt/getmntany if it isn't NULL. If it is NULL, 34167331909Sdougm * we know it comes from getmntany which can then get 34267331909Sdougm * overwritten later. We strdup it to play it safe. 34367331909Sdougm */ 344fa9e4066Sahrens if (mountpoint == NULL) 345d8689a57Sdougm mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); 34667331909Sdougm else 347d8689a57Sdougm mntpt = zfs_strdup(zhp->zfs_hdl, mountpoint); 348fa9e4066Sahrens 349fa9e4066Sahrens /* 3503bb79becSeschrock * Unshare and unmount the filesystem 351fa9e4066Sahrens */ 352eb66cf86Sth if (zfs_unshare_nfs(zhp, mntpt) != 0) 353eb66cf86Sth return (-1); 354eb66cf86Sth 355eb66cf86Sth if (unmount_one(zhp->zfs_hdl, mntpt, flags) != 0) { 35667331909Sdougm free(mntpt); 3578ed277d8Sth (void) zfs_share_nfs(zhp); 358fa9e4066Sahrens return (-1); 35967331909Sdougm } 36067331909Sdougm free(mntpt); 361fa9e4066Sahrens } 362fa9e4066Sahrens 363fa9e4066Sahrens return (0); 364fa9e4066Sahrens } 365fa9e4066Sahrens 366fa9e4066Sahrens /* 367fa9e4066Sahrens * Unmount this filesystem and any children inheriting the mountpoint property. 368fa9e4066Sahrens * To do this, just act like we're changing the mountpoint property, but don't 369fa9e4066Sahrens * remount the filesystems afterwards. 370fa9e4066Sahrens */ 371fa9e4066Sahrens int 372fa9e4066Sahrens zfs_unmountall(zfs_handle_t *zhp, int flags) 373fa9e4066Sahrens { 374fa9e4066Sahrens prop_changelist_t *clp; 375fa9e4066Sahrens int ret; 376fa9e4066Sahrens 377fa9e4066Sahrens clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, flags); 378fa9e4066Sahrens if (clp == NULL) 379fa9e4066Sahrens return (-1); 380fa9e4066Sahrens 381fa9e4066Sahrens ret = changelist_prefix(clp); 382fa9e4066Sahrens changelist_free(clp); 383fa9e4066Sahrens 384fa9e4066Sahrens return (ret); 385fa9e4066Sahrens } 386fa9e4066Sahrens 387f3861e1aSahl boolean_t 388f3861e1aSahl zfs_is_shared(zfs_handle_t *zhp) 389f3861e1aSahl { 390f3861e1aSahl if (ZFS_IS_VOLUME(zhp)) 391f3861e1aSahl return (zfs_is_shared_iscsi(zhp)); 392f3861e1aSahl 393f3861e1aSahl return (zfs_is_shared_nfs(zhp, NULL)); 394f3861e1aSahl } 395f3861e1aSahl 396f3861e1aSahl int 397f3861e1aSahl zfs_share(zfs_handle_t *zhp) 398f3861e1aSahl { 399f3861e1aSahl if (ZFS_IS_VOLUME(zhp)) 400f3861e1aSahl return (zfs_share_iscsi(zhp)); 401f3861e1aSahl 402f3861e1aSahl return (zfs_share_nfs(zhp)); 403f3861e1aSahl } 404f3861e1aSahl 405f3861e1aSahl int 406f3861e1aSahl zfs_unshare(zfs_handle_t *zhp) 407f3861e1aSahl { 408f3861e1aSahl if (ZFS_IS_VOLUME(zhp)) 409f3861e1aSahl return (zfs_unshare_iscsi(zhp)); 410f3861e1aSahl 411f3861e1aSahl return (zfs_unshare_nfs(zhp, NULL)); 412f3861e1aSahl } 413f3861e1aSahl 414fa9e4066Sahrens /* 415fa9e4066Sahrens * Check to see if the filesystem is currently shared. 416fa9e4066Sahrens */ 41799653d4eSeschrock boolean_t 418f3861e1aSahl zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) 419fa9e4066Sahrens { 420fa9e4066Sahrens char *mountpoint; 421fa9e4066Sahrens 422fa9e4066Sahrens if (!zfs_is_mounted(zhp, &mountpoint)) 42399653d4eSeschrock return (B_FALSE); 424fa9e4066Sahrens 42599653d4eSeschrock if (is_shared(zhp->zfs_hdl, mountpoint)) { 426fa9e4066Sahrens if (where != NULL) 427fa9e4066Sahrens *where = mountpoint; 428fa9e4066Sahrens else 429fa9e4066Sahrens free(mountpoint); 43099653d4eSeschrock return (B_TRUE); 431fa9e4066Sahrens } else { 432fa9e4066Sahrens free(mountpoint); 43399653d4eSeschrock return (B_FALSE); 434fa9e4066Sahrens } 435fa9e4066Sahrens } 436fa9e4066Sahrens 43767331909Sdougm /* 43867331909Sdougm * Make sure things will work if libshare isn't installed by using 43967331909Sdougm * wrapper functions that check to see that the pointers to functions 44067331909Sdougm * initialized in _zfs_init_libshare() are actually present. 44167331909Sdougm */ 44267331909Sdougm 44367331909Sdougm static sa_handle_t (*_sa_init)(int); 44467331909Sdougm static void (*_sa_fini)(sa_handle_t); 44567331909Sdougm static sa_share_t (*_sa_find_share)(sa_handle_t, char *); 44667331909Sdougm static int (*_sa_enable_share)(sa_share_t, char *); 44767331909Sdougm static int (*_sa_disable_share)(sa_share_t, char *); 44867331909Sdougm static char *(*_sa_errorstr)(int); 44967331909Sdougm static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); 45067331909Sdougm 45167331909Sdougm /* 45267331909Sdougm * _zfs_init_libshare() 45367331909Sdougm * 45467331909Sdougm * Find the libshare.so.1 entry points that we use here and save the 45567331909Sdougm * values to be used later. This is triggered by the runtime loader. 45667331909Sdougm * Make sure the correct ISA version is loaded. 45767331909Sdougm */ 45867331909Sdougm 45967331909Sdougm #pragma init(_zfs_init_libshare) 46067331909Sdougm static void 46167331909Sdougm _zfs_init_libshare(void) 46267331909Sdougm { 46367331909Sdougm void *libshare; 46467331909Sdougm char path[MAXPATHLEN]; 46567331909Sdougm char isa[MAXISALEN]; 46667331909Sdougm 46767331909Sdougm #if defined(_LP64) 46867331909Sdougm if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) 469d8689a57Sdougm isa[0] = '\0'; 47067331909Sdougm #else 47167331909Sdougm isa[0] = '\0'; 47267331909Sdougm #endif 47367331909Sdougm (void) snprintf(path, MAXPATHLEN, 474d8689a57Sdougm "/usr/lib/%s/libshare.so.1", isa); 47567331909Sdougm 47667331909Sdougm if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { 477d8689a57Sdougm _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); 478d8689a57Sdougm _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); 479d8689a57Sdougm _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) 480d8689a57Sdougm dlsym(libshare, "sa_find_share"); 481d8689a57Sdougm _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 482d8689a57Sdougm "sa_enable_share"); 483d8689a57Sdougm _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 484d8689a57Sdougm "sa_disable_share"); 485d8689a57Sdougm _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); 486d8689a57Sdougm _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) 487d8689a57Sdougm dlsym(libshare, "sa_parse_legacy_options"); 48857b448deSdougm if (_sa_init == NULL || _sa_fini == NULL || 48957b448deSdougm _sa_find_share == NULL || _sa_enable_share == NULL || 49057b448deSdougm _sa_disable_share == NULL || _sa_errorstr == NULL || 49157b448deSdougm _sa_parse_legacy_options == NULL) { 49257b448deSdougm _sa_init = NULL; 49357b448deSdougm _sa_fini = NULL; 49457b448deSdougm _sa_disable_share = NULL; 49557b448deSdougm _sa_enable_share = NULL; 49657b448deSdougm _sa_errorstr = NULL; 49757b448deSdougm _sa_parse_legacy_options = NULL; 49857b448deSdougm (void) dlclose(libshare); 49957b448deSdougm } 50067331909Sdougm } 50167331909Sdougm } 50267331909Sdougm 50367331909Sdougm /* 50467331909Sdougm * zfs_init_libshare(zhandle, service) 50567331909Sdougm * 50667331909Sdougm * Initialize the libshare API if it hasn't already been initialized. 50767331909Sdougm * In all cases it returns 0 if it succeeded and an error if not. The 50867331909Sdougm * service value is which part(s) of the API to initialize and is a 50967331909Sdougm * direct map to the libshare sa_init(service) interface. 51067331909Sdougm */ 51167331909Sdougm 51267331909Sdougm int 51367331909Sdougm zfs_init_libshare(libzfs_handle_t *zhandle, int service) 51467331909Sdougm { 51567331909Sdougm int ret = SA_OK; 51667331909Sdougm 517d8689a57Sdougm if (_sa_init == NULL) 518d8689a57Sdougm ret = SA_CONFIG_ERR; 519d8689a57Sdougm 520d8689a57Sdougm if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) 521d8689a57Sdougm zhandle->libzfs_sharehdl = _sa_init(service); 522d8689a57Sdougm 523d8689a57Sdougm if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) 524d8689a57Sdougm ret = SA_NO_MEMORY; 525d8689a57Sdougm 52667331909Sdougm return (ret); 52767331909Sdougm } 52867331909Sdougm 52967331909Sdougm /* 53067331909Sdougm * zfs_uninit_libshare(zhandle) 53167331909Sdougm * 53267331909Sdougm * Uninitialize the libshare API if it hasn't already been 53367331909Sdougm * uninitialized. It is OK to call multiple times. 53467331909Sdougm */ 53567331909Sdougm 53667331909Sdougm void 53767331909Sdougm zfs_uninit_libshare(libzfs_handle_t *zhandle) 53867331909Sdougm { 53967331909Sdougm 54067331909Sdougm if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { 541d8689a57Sdougm if (_sa_fini != NULL) 542d8689a57Sdougm _sa_fini(zhandle->libzfs_sharehdl); 543d8689a57Sdougm zhandle->libzfs_sharehdl = NULL; 54467331909Sdougm } 54567331909Sdougm } 54667331909Sdougm 54767331909Sdougm /* 54867331909Sdougm * zfs_parse_options(options, proto) 54967331909Sdougm * 55067331909Sdougm * Call the legacy parse interface to get the protocol specific 55167331909Sdougm * options using the NULL arg to indicate that this is a "parse" only. 55267331909Sdougm */ 55367331909Sdougm 55467331909Sdougm int 55567331909Sdougm zfs_parse_options(char *options, char *proto) 55667331909Sdougm { 55767331909Sdougm int ret; 55867331909Sdougm 55967331909Sdougm if (_sa_parse_legacy_options != NULL) 560d8689a57Sdougm ret = _sa_parse_legacy_options(NULL, options, proto); 56167331909Sdougm else 562d8689a57Sdougm ret = SA_CONFIG_ERR; 56367331909Sdougm return (ret); 56467331909Sdougm } 56567331909Sdougm 56667331909Sdougm /* 56767331909Sdougm * zfs_sa_find_share(handle, path) 56867331909Sdougm * 56967331909Sdougm * wrapper around sa_find_share to find a share path in the 57067331909Sdougm * configuration. 57167331909Sdougm */ 57267331909Sdougm 57367331909Sdougm static sa_share_t 57467331909Sdougm zfs_sa_find_share(sa_handle_t handle, char *path) 57567331909Sdougm { 57667331909Sdougm if (_sa_find_share != NULL) 577d8689a57Sdougm return (_sa_find_share(handle, path)); 57867331909Sdougm return (NULL); 57967331909Sdougm } 58067331909Sdougm 58167331909Sdougm /* 58267331909Sdougm * zfs_sa_enable_share(share, proto) 58367331909Sdougm * 58467331909Sdougm * Wrapper for sa_enable_share which enables a share for a specified 58567331909Sdougm * protocol. 58667331909Sdougm */ 58767331909Sdougm 58867331909Sdougm static int 58967331909Sdougm zfs_sa_enable_share(sa_share_t share, char *proto) 59067331909Sdougm { 59167331909Sdougm if (_sa_enable_share != NULL) 592d8689a57Sdougm return (_sa_enable_share(share, proto)); 59367331909Sdougm return (SA_CONFIG_ERR); 59467331909Sdougm } 59567331909Sdougm 59667331909Sdougm /* 59767331909Sdougm * zfs_sa_disable_share(share, proto) 59867331909Sdougm * 59967331909Sdougm * Wrapper for sa_enable_share which disables a share for a specified 60067331909Sdougm * protocol. 60167331909Sdougm */ 60267331909Sdougm 60367331909Sdougm static int 60467331909Sdougm zfs_sa_disable_share(sa_share_t share, char *proto) 60567331909Sdougm { 60667331909Sdougm if (_sa_disable_share != NULL) 607d8689a57Sdougm return (_sa_disable_share(share, proto)); 60867331909Sdougm return (SA_CONFIG_ERR); 60967331909Sdougm } 61067331909Sdougm 611fa9e4066Sahrens /* 612fa9e4066Sahrens * Share the given filesystem according to the options in 'sharenfs'. We rely 61367331909Sdougm * on "libshare" to the dirty work for us. 614fa9e4066Sahrens */ 61567331909Sdougm 616fa9e4066Sahrens int 617f3861e1aSahl zfs_share_nfs(zfs_handle_t *zhp) 618fa9e4066Sahrens { 619fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 620fa9e4066Sahrens char shareopts[ZFS_MAXPROPLEN]; 62199653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 62267331909Sdougm sa_share_t share; 62367331909Sdougm int ret; 624fa9e4066Sahrens 625e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 626fa9e4066Sahrens return (0); 627fa9e4066Sahrens 628f3861e1aSahl /* 629f3861e1aSahl * Return success if there are no share options. 630f3861e1aSahl */ 631fa9e4066Sahrens if (zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts, sizeof (shareopts), 63299653d4eSeschrock NULL, NULL, 0, B_FALSE) != 0 || 633fa9e4066Sahrens strcmp(shareopts, "off") == 0) 634fa9e4066Sahrens return (0); 635fa9e4066Sahrens 636fa9e4066Sahrens /* 637e9dbad6fSeschrock * If the 'zoned' property is set, then zfs_is_mountable() will have 638e9dbad6fSeschrock * already bailed out if we are in the global zone. But local 639e9dbad6fSeschrock * zones cannot be NFS servers, so we ignore it for local zones as well. 640fa9e4066Sahrens */ 641e9dbad6fSeschrock if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) 642fa9e4066Sahrens return (0); 643fa9e4066Sahrens 64467331909Sdougm if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { 645d8689a57Sdougm (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 646d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), 647d8689a57Sdougm zfs_get_name(zhp), _sa_errorstr(ret)); 648d8689a57Sdougm return (-1); 64967331909Sdougm } 65067331909Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); 65167331909Sdougm if (share != NULL) { 652d8689a57Sdougm int err; 653d8689a57Sdougm err = zfs_sa_enable_share(share, "nfs"); 654d8689a57Sdougm if (err != SA_OK) { 655d8689a57Sdougm (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 656d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 657d8689a57Sdougm zfs_get_name(zhp)); 658d8689a57Sdougm return (-1); 659d8689a57Sdougm } 66067331909Sdougm } else { 66167331909Sdougm (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 662d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 663d8689a57Sdougm zfs_get_name(zhp)); 664fa9e4066Sahrens return (-1); 665fa9e4066Sahrens } 666fa9e4066Sahrens 667fa9e4066Sahrens return (0); 668fa9e4066Sahrens } 669fa9e4066Sahrens 6703bb79becSeschrock /* 6713bb79becSeschrock * Unshare a filesystem by mountpoint. 6723bb79becSeschrock */ 6733bb79becSeschrock static int 6743bb79becSeschrock unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint) 6753bb79becSeschrock { 67667331909Sdougm sa_share_t share; 67767331909Sdougm int err; 67867331909Sdougm char *mntpt; 6793bb79becSeschrock 6803bb79becSeschrock /* 68167331909Sdougm * Mountpoint could get trashed if libshare calls getmntany 68267331909Sdougm * which id does during API initialization, so strdup the 68367331909Sdougm * value. 6843bb79becSeschrock */ 68567331909Sdougm mntpt = zfs_strdup(hdl, mountpoint); 6863bb79becSeschrock 68767331909Sdougm /* make sure libshare initialized */ 68867331909Sdougm if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { 68967331909Sdougm free(mntpt); /* don't need the copy anymore */ 69067331909Sdougm return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 691d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 692d8689a57Sdougm name, _sa_errorstr(err))); 69367331909Sdougm } 6943bb79becSeschrock 69567331909Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); 69667331909Sdougm free(mntpt); /* don't need the copy anymore */ 6973bb79becSeschrock 69867331909Sdougm if (share != NULL) { 69967331909Sdougm err = zfs_sa_disable_share(share, "nfs"); 70067331909Sdougm if (err != SA_OK) { 701d8689a57Sdougm return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 702d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 703d8689a57Sdougm name, _sa_errorstr(err))); 70467331909Sdougm } 70567331909Sdougm } else { 706ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 707d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), 708d8689a57Sdougm name)); 7093bb79becSeschrock } 7103bb79becSeschrock return (0); 7113bb79becSeschrock } 7123bb79becSeschrock 713fa9e4066Sahrens /* 714fa9e4066Sahrens * Unshare the given filesystem. 715fa9e4066Sahrens */ 716fa9e4066Sahrens int 717f3861e1aSahl zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) 718fa9e4066Sahrens { 719fa9e4066Sahrens struct mnttab search = { 0 }, entry; 72067331909Sdougm char *mntpt = NULL; 721fa9e4066Sahrens 722fa9e4066Sahrens /* check to see if need to unmount the filesystem */ 723fa9e4066Sahrens search.mnt_special = (char *)zfs_get_name(zhp); 72496dedd18Snd search.mnt_fstype = MNTTYPE_ZFS; 72599653d4eSeschrock rewind(zhp->zfs_hdl->libzfs_mnttab); 726d8689a57Sdougm if (mountpoint != NULL) 727d8689a57Sdougm mountpoint = mntpt = zfs_strdup(zhp->zfs_hdl, mountpoint); 728d8689a57Sdougm 729fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 73099653d4eSeschrock getmntany(zhp->zfs_hdl->libzfs_mnttab, &entry, &search) == 0)) { 731fa9e4066Sahrens 732fa9e4066Sahrens if (mountpoint == NULL) 733fa9e4066Sahrens mountpoint = entry.mnt_mountp; 734fa9e4066Sahrens 7353bb79becSeschrock if (is_shared(zhp->zfs_hdl, mountpoint) && 73667331909Sdougm unshare_one(zhp->zfs_hdl, zhp->zfs_name, mountpoint) != 0) { 73767331909Sdougm if (mntpt != NULL) 73867331909Sdougm free(mntpt); 7393bb79becSeschrock return (-1); 74067331909Sdougm } 741fa9e4066Sahrens } 74267331909Sdougm if (mntpt != NULL) 743d8689a57Sdougm free(mntpt); 744fa9e4066Sahrens 745fa9e4066Sahrens return (0); 746fa9e4066Sahrens } 747fa9e4066Sahrens 748fa9e4066Sahrens /* 749f3861e1aSahl * Same as zfs_unmountall(), but for NFS unshares. 750fa9e4066Sahrens */ 751fa9e4066Sahrens int 752f3861e1aSahl zfs_unshareall_nfs(zfs_handle_t *zhp) 753fa9e4066Sahrens { 754fa9e4066Sahrens prop_changelist_t *clp; 755fa9e4066Sahrens int ret; 756fa9e4066Sahrens 757fa9e4066Sahrens clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0); 758fa9e4066Sahrens if (clp == NULL) 759fa9e4066Sahrens return (-1); 760fa9e4066Sahrens 761fa9e4066Sahrens ret = changelist_unshare(clp); 762fa9e4066Sahrens changelist_free(clp); 763fa9e4066Sahrens 764fa9e4066Sahrens return (ret); 765fa9e4066Sahrens } 766fa9e4066Sahrens 767fa9e4066Sahrens /* 768fa9e4066Sahrens * Remove the mountpoint associated with the current dataset, if necessary. 769fa9e4066Sahrens * We only remove the underlying directory if: 770fa9e4066Sahrens * 771fa9e4066Sahrens * - The mountpoint is not 'none' or 'legacy' 772fa9e4066Sahrens * - The mountpoint is non-empty 773fa9e4066Sahrens * - The mountpoint is the default or inherited 774fa9e4066Sahrens * - The 'zoned' property is set, or we're in a local zone 775fa9e4066Sahrens * 776fa9e4066Sahrens * Any other directories we leave alone. 777fa9e4066Sahrens */ 778fa9e4066Sahrens void 779fa9e4066Sahrens remove_mountpoint(zfs_handle_t *zhp) 780fa9e4066Sahrens { 781fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 782*990b4856Slling zprop_source_t source; 783fa9e4066Sahrens 784e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), 785e9dbad6fSeschrock &source)) 786fa9e4066Sahrens return; 787fa9e4066Sahrens 788*990b4856Slling if (source == ZPROP_SRC_DEFAULT || 789*990b4856Slling source == ZPROP_SRC_INHERITED) { 790fa9e4066Sahrens /* 791fa9e4066Sahrens * Try to remove the directory, silently ignoring any errors. 792fa9e4066Sahrens * The filesystem may have since been removed or moved around, 793e9dbad6fSeschrock * and this error isn't really useful to the administrator in 794e9dbad6fSeschrock * any way. 795fa9e4066Sahrens */ 796fa9e4066Sahrens (void) rmdir(mountpoint); 797fa9e4066Sahrens } 798fa9e4066Sahrens } 7993bb79becSeschrock 800f3861e1aSahl boolean_t 801f3861e1aSahl zfs_is_shared_iscsi(zfs_handle_t *zhp) 802f3861e1aSahl { 803ecd6cf80Smarks 804ecd6cf80Smarks /* 805ecd6cf80Smarks * If iscsi deamon isn't running then we aren't shared 806ecd6cf80Smarks */ 807ecd6cf80Smarks if (iscsitgt_svc_online && iscsitgt_svc_online() == 1) 808ecd6cf80Smarks return (0); 809ecd6cf80Smarks else 810ecd6cf80Smarks return (iscsitgt_zfs_is_shared != NULL && 811ecd6cf80Smarks iscsitgt_zfs_is_shared(zhp->zfs_name) != 0); 812f3861e1aSahl } 813f3861e1aSahl 814f3861e1aSahl int 815f3861e1aSahl zfs_share_iscsi(zfs_handle_t *zhp) 816f3861e1aSahl { 817f3861e1aSahl char shareopts[ZFS_MAXPROPLEN]; 818f3861e1aSahl const char *dataset = zhp->zfs_name; 819f3861e1aSahl libzfs_handle_t *hdl = zhp->zfs_hdl; 820f3861e1aSahl 821f3861e1aSahl /* 822f3861e1aSahl * Return success if there are no share options. 823f3861e1aSahl */ 824f3861e1aSahl if (zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts, 825f3861e1aSahl sizeof (shareopts), NULL, NULL, 0, B_FALSE) != 0 || 826f3861e1aSahl strcmp(shareopts, "off") == 0) 827f3861e1aSahl return (0); 828f3861e1aSahl 829ecd6cf80Smarks if (iscsitgt_zfs_share == NULL || iscsitgt_zfs_share(dataset) != 0) { 830ecd6cf80Smarks int error = EZFS_SHAREISCSIFAILED; 831ecd6cf80Smarks 832ecd6cf80Smarks /* 833ecd6cf80Smarks * If service isn't availabele and EPERM was 834ecd6cf80Smarks * returned then use special error. 835ecd6cf80Smarks */ 836ecd6cf80Smarks if (iscsitgt_svc_online && errno == EPERM && 837ecd6cf80Smarks (iscsitgt_svc_online() != 0)) 838ecd6cf80Smarks error = EZFS_ISCSISVCUNAVAIL; 839ecd6cf80Smarks 840ecd6cf80Smarks return (zfs_error_fmt(hdl, error, 841f3861e1aSahl dgettext(TEXT_DOMAIN, "cannot share '%s'"), dataset)); 842ecd6cf80Smarks } 843f3861e1aSahl 844f3861e1aSahl return (0); 845f3861e1aSahl } 846f3861e1aSahl 847f3861e1aSahl int 848f3861e1aSahl zfs_unshare_iscsi(zfs_handle_t *zhp) 849f3861e1aSahl { 850f3861e1aSahl const char *dataset = zfs_get_name(zhp); 851f3861e1aSahl libzfs_handle_t *hdl = zhp->zfs_hdl; 852f3861e1aSahl 85311d2789dSgw /* 85411d2789dSgw * Return if the volume is not shared 85511d2789dSgw */ 85611d2789dSgw if (!zfs_is_shared_iscsi(zhp)) 85711d2789dSgw return (0); 85811d2789dSgw 859f3861e1aSahl /* 860f3861e1aSahl * If this fails with ENODEV it indicates that zvol wasn't shared so 861f3861e1aSahl * we should return success in that case. 862f3861e1aSahl */ 863d8d59944Sahl if (iscsitgt_zfs_unshare == NULL || 864ecd6cf80Smarks (iscsitgt_zfs_unshare(dataset) != 0 && errno != ENODEV)) { 865ecd6cf80Smarks if (errno == EPERM) 866ecd6cf80Smarks zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 867ecd6cf80Smarks "Insufficient privileges to unshare iscsi")); 868ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UNSHAREISCSIFAILED, 869f3861e1aSahl dgettext(TEXT_DOMAIN, "cannot unshare '%s'"), dataset)); 870ecd6cf80Smarks } 871f3861e1aSahl 872f3861e1aSahl return (0); 873f3861e1aSahl } 874f3861e1aSahl 8753bb79becSeschrock typedef struct mount_cbdata { 8763bb79becSeschrock zfs_handle_t **cb_datasets; 8773bb79becSeschrock int cb_used; 8783bb79becSeschrock int cb_alloc; 8793bb79becSeschrock } mount_cbdata_t; 8803bb79becSeschrock 8813bb79becSeschrock static int 8823bb79becSeschrock mount_cb(zfs_handle_t *zhp, void *data) 8833bb79becSeschrock { 8843bb79becSeschrock mount_cbdata_t *cbp = data; 8853bb79becSeschrock 886f3861e1aSahl if (!(zfs_get_type(zhp) & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) { 8873bb79becSeschrock zfs_close(zhp); 8883bb79becSeschrock return (0); 8893bb79becSeschrock } 8903bb79becSeschrock 8913bb79becSeschrock if (cbp->cb_alloc == cbp->cb_used) { 892e9dbad6fSeschrock void *ptr; 8933bb79becSeschrock 894e9dbad6fSeschrock if ((ptr = zfs_realloc(zhp->zfs_hdl, 895e9dbad6fSeschrock cbp->cb_datasets, cbp->cb_alloc * sizeof (void *), 896e9dbad6fSeschrock cbp->cb_alloc * 2 * sizeof (void *))) == NULL) 8973bb79becSeschrock return (-1); 898e9dbad6fSeschrock cbp->cb_datasets = ptr; 8993bb79becSeschrock 900e9dbad6fSeschrock cbp->cb_alloc *= 2; 9013bb79becSeschrock } 9023bb79becSeschrock 9033bb79becSeschrock cbp->cb_datasets[cbp->cb_used++] = zhp; 904f3861e1aSahl 905f3861e1aSahl return (zfs_iter_children(zhp, mount_cb, cbp)); 9063bb79becSeschrock } 9073bb79becSeschrock 9083bb79becSeschrock static int 909f3861e1aSahl dataset_cmp(const void *a, const void *b) 9103bb79becSeschrock { 9113bb79becSeschrock zfs_handle_t **za = (zfs_handle_t **)a; 9123bb79becSeschrock zfs_handle_t **zb = (zfs_handle_t **)b; 9133bb79becSeschrock char mounta[MAXPATHLEN]; 9143bb79becSeschrock char mountb[MAXPATHLEN]; 915f3861e1aSahl boolean_t gota, gotb; 916f3861e1aSahl 917f3861e1aSahl if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) 918f3861e1aSahl verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, 919f3861e1aSahl sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 920f3861e1aSahl if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) 921f3861e1aSahl verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, 922f3861e1aSahl sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 923f3861e1aSahl 924f3861e1aSahl if (gota && gotb) 925f3861e1aSahl return (strcmp(mounta, mountb)); 9263bb79becSeschrock 927f3861e1aSahl if (gota) 928f3861e1aSahl return (-1); 929f3861e1aSahl if (gotb) 930f3861e1aSahl return (1); 9313bb79becSeschrock 932f3861e1aSahl return (strcmp(zfs_get_name(a), zfs_get_name(b))); 9333bb79becSeschrock } 9343bb79becSeschrock 935f3861e1aSahl /* 936f3861e1aSahl * Mount and share all datasets within the given pool. This assumes that no 937f3861e1aSahl * datasets within the pool are currently mounted. Because users can create 938f3861e1aSahl * complicated nested hierarchies of mountpoints, we first gather all the 939f3861e1aSahl * datasets and mountpoints within the pool, and sort them by mountpoint. Once 940f3861e1aSahl * we have the list of all filesystems, we iterate over them in order and mount 941f3861e1aSahl * and/or share each one. 942f3861e1aSahl */ 943f3861e1aSahl #pragma weak zpool_mount_datasets = zpool_enable_datasets 9443bb79becSeschrock int 945f3861e1aSahl zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) 9463bb79becSeschrock { 9473bb79becSeschrock mount_cbdata_t cb = { 0 }; 9483bb79becSeschrock libzfs_handle_t *hdl = zhp->zpool_hdl; 9493bb79becSeschrock zfs_handle_t *zfsp; 9503bb79becSeschrock int i, ret = -1; 95167331909Sdougm int *good; 9523bb79becSeschrock 9533bb79becSeschrock /* 9543bb79becSeschrock * Gather all datasets within the pool. 9553bb79becSeschrock */ 9563bb79becSeschrock if ((cb.cb_datasets = zfs_alloc(hdl, 4 * sizeof (void *))) == NULL) 9573bb79becSeschrock return (-1); 9583bb79becSeschrock cb.cb_alloc = 4; 9593bb79becSeschrock 960*990b4856Slling if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) 9613bb79becSeschrock goto out; 9623bb79becSeschrock 9633bb79becSeschrock cb.cb_datasets[0] = zfsp; 9643bb79becSeschrock cb.cb_used = 1; 9653bb79becSeschrock 9663bb79becSeschrock if (zfs_iter_children(zfsp, mount_cb, &cb) != 0) 9673bb79becSeschrock goto out; 9683bb79becSeschrock 9693bb79becSeschrock /* 9703bb79becSeschrock * Sort the datasets by mountpoint. 9713bb79becSeschrock */ 972f3861e1aSahl qsort(cb.cb_datasets, cb.cb_used, sizeof (void *), dataset_cmp); 9733bb79becSeschrock 9743bb79becSeschrock /* 97567331909Sdougm * And mount all the datasets, keeping track of which ones 97667331909Sdougm * succeeded or failed. By using zfs_alloc(), the good pointer 97767331909Sdougm * will always be non-NULL. 9783bb79becSeschrock */ 97967331909Sdougm good = zfs_alloc(zhp->zpool_hdl, cb.cb_used * sizeof (int)); 9803bb79becSeschrock ret = 0; 9813bb79becSeschrock for (i = 0; i < cb.cb_used; i++) { 982d8689a57Sdougm if (zfs_mount(cb.cb_datasets[i], mntopts, flags) != 0) 9833bb79becSeschrock ret = -1; 984d8689a57Sdougm else 98567331909Sdougm good[i] = 1; 9863bb79becSeschrock } 98767331909Sdougm /* 98867331909Sdougm * Then share all the ones that need to be shared. This needs 98967331909Sdougm * to be a separate pass in order to avoid excessive reloading 99067331909Sdougm * of the configuration. Good should never be NULL since 99167331909Sdougm * zfs_alloc is supposed to exit if memory isn't available. 99267331909Sdougm */ 99367331909Sdougm zfs_uninit_libshare(hdl); 99467331909Sdougm for (i = 0; i < cb.cb_used; i++) { 99567331909Sdougm if (good[i] && zfs_share(cb.cb_datasets[i]) != 0) 99667331909Sdougm ret = -1; 99767331909Sdougm } 99867331909Sdougm 99967331909Sdougm free(good); 10003bb79becSeschrock 10013bb79becSeschrock out: 10023bb79becSeschrock for (i = 0; i < cb.cb_used; i++) 10033bb79becSeschrock zfs_close(cb.cb_datasets[i]); 10043bb79becSeschrock free(cb.cb_datasets); 10053bb79becSeschrock 10063bb79becSeschrock return (ret); 10073bb79becSeschrock } 10083bb79becSeschrock 1009f3861e1aSahl 1010f3861e1aSahl static int 1011f3861e1aSahl zvol_cb(const char *dataset, void *data) 1012f3861e1aSahl { 1013f3861e1aSahl libzfs_handle_t *hdl = data; 1014f3861e1aSahl zfs_handle_t *zhp; 1015f3861e1aSahl 1016f3861e1aSahl /* 1017f3861e1aSahl * Ignore snapshots and ignore failures from non-existant datasets. 1018f3861e1aSahl */ 1019f3861e1aSahl if (strchr(dataset, '@') != NULL || 1020f3861e1aSahl (zhp = zfs_open(hdl, dataset, ZFS_TYPE_VOLUME)) == NULL) 1021f3861e1aSahl return (0); 1022f3861e1aSahl 1023ecd6cf80Smarks if (zfs_unshare_iscsi(zhp) != 0) 1024ecd6cf80Smarks return (-1); 1025f3861e1aSahl 1026f3861e1aSahl zfs_close(zhp); 1027f3861e1aSahl 1028f3861e1aSahl return (0); 1029f3861e1aSahl } 1030f3861e1aSahl 10313bb79becSeschrock static int 10323bb79becSeschrock mountpoint_compare(const void *a, const void *b) 10333bb79becSeschrock { 10343bb79becSeschrock const char *mounta = *((char **)a); 10353bb79becSeschrock const char *mountb = *((char **)b); 10363bb79becSeschrock 10373bb79becSeschrock return (strcmp(mountb, mounta)); 10383bb79becSeschrock } 10393bb79becSeschrock 1040f3861e1aSahl /* 1041f3861e1aSahl * Unshare and unmount all datasets within the given pool. We don't want to 1042f3861e1aSahl * rely on traversing the DSL to discover the filesystems within the pool, 1043f3861e1aSahl * because this may be expensive (if not all of them are mounted), and can fail 1044f3861e1aSahl * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and 1045f3861e1aSahl * gather all the filesystems that are currently mounted. 1046f3861e1aSahl */ 1047f3861e1aSahl #pragma weak zpool_unmount_datasets = zpool_disable_datasets 10483bb79becSeschrock int 1049f3861e1aSahl zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) 10503bb79becSeschrock { 10513bb79becSeschrock int used, alloc; 10523bb79becSeschrock struct mnttab entry; 10533bb79becSeschrock size_t namelen; 10543bb79becSeschrock char **mountpoints = NULL; 10553bb79becSeschrock zfs_handle_t **datasets = NULL; 10563bb79becSeschrock libzfs_handle_t *hdl = zhp->zpool_hdl; 10573bb79becSeschrock int i; 10583bb79becSeschrock int ret = -1; 10593bb79becSeschrock int flags = (force ? MS_FORCE : 0); 10603bb79becSeschrock 1061f3861e1aSahl /* 1062f3861e1aSahl * First unshare all zvols. 1063f3861e1aSahl */ 1064f3861e1aSahl if (zpool_iter_zvol(zhp, zvol_cb, hdl) != 0) 1065f3861e1aSahl return (-1); 1066f3861e1aSahl 10673bb79becSeschrock namelen = strlen(zhp->zpool_name); 10683bb79becSeschrock 10693bb79becSeschrock rewind(hdl->libzfs_mnttab); 10703bb79becSeschrock used = alloc = 0; 10713bb79becSeschrock while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 10723bb79becSeschrock /* 10733bb79becSeschrock * Ignore non-ZFS entries. 10743bb79becSeschrock */ 10753bb79becSeschrock if (entry.mnt_fstype == NULL || 10763bb79becSeschrock strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 10773bb79becSeschrock continue; 10783bb79becSeschrock 10793bb79becSeschrock /* 10803bb79becSeschrock * Ignore filesystems not within this pool. 10813bb79becSeschrock */ 10823bb79becSeschrock if (entry.mnt_mountp == NULL || 10833bb79becSeschrock strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || 10843bb79becSeschrock (entry.mnt_special[namelen] != '/' && 10853bb79becSeschrock entry.mnt_special[namelen] != '\0')) 10863bb79becSeschrock continue; 10873bb79becSeschrock 10883bb79becSeschrock /* 10893bb79becSeschrock * At this point we've found a filesystem within our pool. Add 10903bb79becSeschrock * it to our growing list. 10913bb79becSeschrock */ 10923bb79becSeschrock if (used == alloc) { 10933bb79becSeschrock if (alloc == 0) { 10943bb79becSeschrock if ((mountpoints = zfs_alloc(hdl, 10953bb79becSeschrock 8 * sizeof (void *))) == NULL) 10963bb79becSeschrock goto out; 10973bb79becSeschrock 10983bb79becSeschrock if ((datasets = zfs_alloc(hdl, 10993bb79becSeschrock 8 * sizeof (void *))) == NULL) 11003bb79becSeschrock goto out; 11013bb79becSeschrock 11023bb79becSeschrock alloc = 8; 11033bb79becSeschrock } else { 1104e9dbad6fSeschrock void *ptr; 11053bb79becSeschrock 1106e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, mountpoints, 1107e9dbad6fSeschrock alloc * sizeof (void *), 11083bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 11093bb79becSeschrock goto out; 1110e9dbad6fSeschrock mountpoints = ptr; 11113bb79becSeschrock 1112e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, datasets, 1113e9dbad6fSeschrock alloc * sizeof (void *), 11143bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 11153bb79becSeschrock goto out; 1116e9dbad6fSeschrock datasets = ptr; 11173bb79becSeschrock 11183bb79becSeschrock alloc *= 2; 11193bb79becSeschrock } 11203bb79becSeschrock } 11213bb79becSeschrock 11223bb79becSeschrock if ((mountpoints[used] = zfs_strdup(hdl, 11233bb79becSeschrock entry.mnt_mountp)) == NULL) 11243bb79becSeschrock goto out; 11253bb79becSeschrock 11263bb79becSeschrock /* 11273bb79becSeschrock * This is allowed to fail, in case there is some I/O error. It 11283bb79becSeschrock * is only used to determine if we need to remove the underlying 11293bb79becSeschrock * mountpoint, so failure is not fatal. 11303bb79becSeschrock */ 11313bb79becSeschrock datasets[used] = make_dataset_handle(hdl, entry.mnt_special); 11323bb79becSeschrock 11333bb79becSeschrock used++; 11343bb79becSeschrock } 11353bb79becSeschrock 11363bb79becSeschrock /* 11373bb79becSeschrock * At this point, we have the entire list of filesystems, so sort it by 11383bb79becSeschrock * mountpoint. 11393bb79becSeschrock */ 11403bb79becSeschrock qsort(mountpoints, used, sizeof (char *), mountpoint_compare); 11413bb79becSeschrock 11423bb79becSeschrock /* 11433bb79becSeschrock * Walk through and first unshare everything. 11443bb79becSeschrock */ 11453bb79becSeschrock for (i = 0; i < used; i++) { 11463bb79becSeschrock if (is_shared(hdl, mountpoints[i]) && 1147e9dbad6fSeschrock unshare_one(hdl, mountpoints[i], mountpoints[i]) != 0) 11483bb79becSeschrock goto out; 11493bb79becSeschrock } 11503bb79becSeschrock 11513bb79becSeschrock /* 11523bb79becSeschrock * Now unmount everything, removing the underlying directories as 11533bb79becSeschrock * appropriate. 11543bb79becSeschrock */ 11553bb79becSeschrock for (i = 0; i < used; i++) { 11563bb79becSeschrock if (unmount_one(hdl, mountpoints[i], flags) != 0) 11573bb79becSeschrock goto out; 1158e9dbad6fSeschrock } 11593bb79becSeschrock 1160e9dbad6fSeschrock for (i = 0; i < used; i++) { 11613bb79becSeschrock if (datasets[i]) 11623bb79becSeschrock remove_mountpoint(datasets[i]); 11633bb79becSeschrock } 11643bb79becSeschrock 11653bb79becSeschrock ret = 0; 11663bb79becSeschrock out: 11673bb79becSeschrock for (i = 0; i < used; i++) { 11683bb79becSeschrock if (datasets[i]) 11693bb79becSeschrock zfs_close(datasets[i]); 11703bb79becSeschrock free(mountpoints[i]); 11713bb79becSeschrock } 11723bb79becSeschrock free(datasets); 11733bb79becSeschrock free(mountpoints); 11743bb79becSeschrock 11753bb79becSeschrock return (ret); 11763bb79becSeschrock } 1177