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. 24*0dfe541eSEvan Layton */ 25*0dfe541eSEvan Layton 26*0dfe541eSEvan Layton /* 27*0dfe541eSEvan Layton * Copyright 2019 Nexenta Systems, Inc. 28*0dfe541eSEvan Layton * Copyright (c) 2014, 2016 by Delphix. All rights reserved. 2988f61deeSIgor Kozhukhov * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 301c18e8fbSJerry Jelinek * Copyright 2017 Joyent, Inc. 314f4378ccSAndrew Stormont * Copyright 2017 RackTop Systems. 32bc4c0ff1SAndy Fiddaman * Copyright 2018 OmniOS Community Edition (OmniOSce) Association. 33fa9e4066Sahrens */ 34fa9e4066Sahrens 35fa9e4066Sahrens /* 36fa9e4066Sahrens * Routines to manage ZFS mounts. We separate all the nasty routines that have 37f3861e1aSahl * to deal with the OS. The following functions are the main entry points -- 38f3861e1aSahl * they are used by mount and unmount and when changing a filesystem's 39f3861e1aSahl * mountpoint. 40fa9e4066Sahrens * 41591e0e13SSebastien Roy * zfs_is_mounted() 42591e0e13SSebastien Roy * zfs_mount() 43591e0e13SSebastien Roy * zfs_unmount() 44591e0e13SSebastien Roy * zfs_unmountall() 45fa9e4066Sahrens * 46f3861e1aSahl * This file also contains the functions used to manage sharing filesystems via 47f3861e1aSahl * NFS and iSCSI: 48fa9e4066Sahrens * 49591e0e13SSebastien Roy * zfs_is_shared() 50591e0e13SSebastien Roy * zfs_share() 51591e0e13SSebastien Roy * zfs_unshare() 52f3861e1aSahl * 53591e0e13SSebastien Roy * zfs_is_shared_nfs() 54591e0e13SSebastien Roy * zfs_is_shared_smb() 55591e0e13SSebastien Roy * zfs_share_proto() 56591e0e13SSebastien Roy * zfs_shareall(); 57591e0e13SSebastien Roy * zfs_unshare_nfs() 58591e0e13SSebastien Roy * zfs_unshare_smb() 59591e0e13SSebastien Roy * zfs_unshareall_nfs() 60da6c28aaSamw * zfs_unshareall_smb() 61da6c28aaSamw * zfs_unshareall() 62da6c28aaSamw * zfs_unshareall_bypath() 633bb79becSeschrock * 643bb79becSeschrock * The following functions are available for pool consumers, and will 65f3861e1aSahl * mount/unmount and share/unshare all datasets within pool: 663bb79becSeschrock * 67591e0e13SSebastien Roy * zpool_enable_datasets() 68591e0e13SSebastien Roy * zpool_disable_datasets() 69fa9e4066Sahrens */ 70fa9e4066Sahrens 71fa9e4066Sahrens #include <dirent.h> 72d8d59944Sahl #include <dlfcn.h> 73fa9e4066Sahrens #include <errno.h> 74d420209dSAlex Reece #include <fcntl.h> 75fa9e4066Sahrens #include <libgen.h> 76fa9e4066Sahrens #include <libintl.h> 77fa9e4066Sahrens #include <stdio.h> 78fa9e4066Sahrens #include <stdlib.h> 79fa9e4066Sahrens #include <strings.h> 80fa9e4066Sahrens #include <unistd.h> 81fa9e4066Sahrens #include <zone.h> 82fa9e4066Sahrens #include <sys/mntent.h> 83fa9e4066Sahrens #include <sys/mount.h> 84fa9e4066Sahrens #include <sys/stat.h> 85873c4903SPrakash Surya #include <sys/statvfs.h> 86eb633035STom Caputi #include <sys/dsl_crypt.h> 87fa9e4066Sahrens 88fa9e4066Sahrens #include <libzfs.h> 89fa9e4066Sahrens 90fa9e4066Sahrens #include "libzfs_impl.h" 91591e0e13SSebastien Roy #include "libzfs_taskq.h" 92fa9e4066Sahrens 9367331909Sdougm #include <libshare.h> 9467331909Sdougm #include <sys/systeminfo.h> 9567331909Sdougm #define MAXISALEN 257 /* based on sysinfo(2) man page */ 9667331909Sdougm 97591e0e13SSebastien Roy static int mount_tq_nthr = 512; /* taskq threads for multi-threaded mounting */ 98591e0e13SSebastien Roy 99591e0e13SSebastien Roy static void zfs_mount_task(void *); 100da6c28aaSamw static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); 101da6c28aaSamw zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, 102da6c28aaSamw zfs_share_proto_t); 103da6c28aaSamw 104da6c28aaSamw /* 1054f4378ccSAndrew Stormont * The share protocols table must be in the same order as the zfs_share_proto_t 106da6c28aaSamw * enum in libzfs_impl.h 107da6c28aaSamw */ 108da6c28aaSamw typedef struct { 109da6c28aaSamw zfs_prop_t p_prop; 110da6c28aaSamw char *p_name; 111da6c28aaSamw int p_share_err; 112da6c28aaSamw int p_unshare_err; 113da6c28aaSamw } proto_table_t; 114da6c28aaSamw 115da6c28aaSamw proto_table_t proto_table[PROTO_END] = { 116da6c28aaSamw {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, 117da6c28aaSamw {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, 118da6c28aaSamw }; 119da6c28aaSamw 120da6c28aaSamw zfs_share_proto_t nfs_only[] = { 121da6c28aaSamw PROTO_NFS, 122da6c28aaSamw PROTO_END 123da6c28aaSamw }; 124da6c28aaSamw 125da6c28aaSamw zfs_share_proto_t smb_only[] = { 126da6c28aaSamw PROTO_SMB, 127da6c28aaSamw PROTO_END 128da6c28aaSamw }; 129da6c28aaSamw zfs_share_proto_t share_all_proto[] = { 130da6c28aaSamw PROTO_NFS, 131da6c28aaSamw PROTO_SMB, 132da6c28aaSamw PROTO_END 133da6c28aaSamw }; 134da6c28aaSamw 135fa9e4066Sahrens /* 136da6c28aaSamw * Search the sharetab for the given mountpoint and protocol, returning 137da6c28aaSamw * a zfs_share_type_t value. 138fa9e4066Sahrens */ 139da6c28aaSamw static zfs_share_type_t 140da6c28aaSamw is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) 141fa9e4066Sahrens { 142fa9e4066Sahrens char buf[MAXPATHLEN], *tab; 143da6c28aaSamw char *ptr; 144fa9e4066Sahrens 14599653d4eSeschrock if (hdl->libzfs_sharetab == NULL) 146da6c28aaSamw return (SHARED_NOT_SHARED); 147fa9e4066Sahrens 14899653d4eSeschrock (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); 149fa9e4066Sahrens 15099653d4eSeschrock while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { 151fa9e4066Sahrens 152fa9e4066Sahrens /* the mountpoint is the first entry on each line */ 153da6c28aaSamw if ((tab = strchr(buf, '\t')) == NULL) 154da6c28aaSamw continue; 155da6c28aaSamw 156da6c28aaSamw *tab = '\0'; 157da6c28aaSamw if (strcmp(buf, mountpoint) == 0) { 158da6c28aaSamw /* 159da6c28aaSamw * the protocol field is the third field 160da6c28aaSamw * skip over second field 161da6c28aaSamw */ 162da6c28aaSamw ptr = ++tab; 163da6c28aaSamw if ((tab = strchr(ptr, '\t')) == NULL) 164da6c28aaSamw continue; 165da6c28aaSamw ptr = ++tab; 166da6c28aaSamw if ((tab = strchr(ptr, '\t')) == NULL) 167da6c28aaSamw continue; 168fa9e4066Sahrens *tab = '\0'; 169da6c28aaSamw if (strcmp(ptr, 170da6c28aaSamw proto_table[proto].p_name) == 0) { 171da6c28aaSamw switch (proto) { 172da6c28aaSamw case PROTO_NFS: 173da6c28aaSamw return (SHARED_NFS); 174da6c28aaSamw case PROTO_SMB: 175da6c28aaSamw return (SHARED_SMB); 176da6c28aaSamw default: 177da6c28aaSamw return (0); 178da6c28aaSamw } 179da6c28aaSamw } 180fa9e4066Sahrens } 181fa9e4066Sahrens } 182fa9e4066Sahrens 183da6c28aaSamw return (SHARED_NOT_SHARED); 184fa9e4066Sahrens } 185fa9e4066Sahrens 18699653d4eSeschrock static boolean_t 187873c4903SPrakash Surya dir_is_empty_stat(const char *dirname) 188873c4903SPrakash Surya { 189873c4903SPrakash Surya struct stat st; 190873c4903SPrakash Surya 191873c4903SPrakash Surya /* 192873c4903SPrakash Surya * We only want to return false if the given path is a non empty 193873c4903SPrakash Surya * directory, all other errors are handled elsewhere. 194873c4903SPrakash Surya */ 195873c4903SPrakash Surya if (stat(dirname, &st) < 0 || !S_ISDIR(st.st_mode)) { 196873c4903SPrakash Surya return (B_TRUE); 197873c4903SPrakash Surya } 198873c4903SPrakash Surya 199873c4903SPrakash Surya /* 200873c4903SPrakash Surya * An empty directory will still have two entries in it, one 201873c4903SPrakash Surya * entry for each of "." and "..". 202873c4903SPrakash Surya */ 203873c4903SPrakash Surya if (st.st_size > 2) { 204873c4903SPrakash Surya return (B_FALSE); 205873c4903SPrakash Surya } 206873c4903SPrakash Surya 207873c4903SPrakash Surya return (B_TRUE); 208873c4903SPrakash Surya } 209873c4903SPrakash Surya 210873c4903SPrakash Surya static boolean_t 211873c4903SPrakash Surya dir_is_empty_readdir(const char *dirname) 212fa9e4066Sahrens { 213fa9e4066Sahrens DIR *dirp; 214fa9e4066Sahrens struct dirent64 *dp; 215d420209dSAlex Reece int dirfd; 216fa9e4066Sahrens 217d420209dSAlex Reece if ((dirfd = openat(AT_FDCWD, dirname, 218d420209dSAlex Reece O_RDONLY | O_NDELAY | O_LARGEFILE | O_CLOEXEC, 0)) < 0) { 21999653d4eSeschrock return (B_TRUE); 220d420209dSAlex Reece } 221d420209dSAlex Reece 222d420209dSAlex Reece if ((dirp = fdopendir(dirfd)) == NULL) { 223ba6e7e65SSowrabha Gopal (void) close(dirfd); 224d420209dSAlex Reece return (B_TRUE); 225d420209dSAlex Reece } 226fa9e4066Sahrens 227fa9e4066Sahrens while ((dp = readdir64(dirp)) != NULL) { 228fa9e4066Sahrens 229fa9e4066Sahrens if (strcmp(dp->d_name, ".") == 0 || 230fa9e4066Sahrens strcmp(dp->d_name, "..") == 0) 231fa9e4066Sahrens continue; 232fa9e4066Sahrens 233fa9e4066Sahrens (void) closedir(dirp); 23499653d4eSeschrock return (B_FALSE); 235fa9e4066Sahrens } 236fa9e4066Sahrens 237fa9e4066Sahrens (void) closedir(dirp); 23899653d4eSeschrock return (B_TRUE); 239fa9e4066Sahrens } 240fa9e4066Sahrens 241873c4903SPrakash Surya /* 242873c4903SPrakash Surya * Returns true if the specified directory is empty. If we can't open the 243873c4903SPrakash Surya * directory at all, return true so that the mount can fail with a more 244873c4903SPrakash Surya * informative error message. 245873c4903SPrakash Surya */ 246873c4903SPrakash Surya static boolean_t 247873c4903SPrakash Surya dir_is_empty(const char *dirname) 248873c4903SPrakash Surya { 249873c4903SPrakash Surya struct statvfs64 st; 250873c4903SPrakash Surya 251873c4903SPrakash Surya /* 252873c4903SPrakash Surya * If the statvfs call fails or the filesystem is not a ZFS 253873c4903SPrakash Surya * filesystem, fall back to the slow path which uses readdir. 254873c4903SPrakash Surya */ 255873c4903SPrakash Surya if ((statvfs64(dirname, &st) != 0) || 256873c4903SPrakash Surya (strcmp(st.f_basetype, "zfs") != 0)) { 257873c4903SPrakash Surya return (dir_is_empty_readdir(dirname)); 258873c4903SPrakash Surya } 259873c4903SPrakash Surya 260873c4903SPrakash Surya /* 261873c4903SPrakash Surya * At this point, we know the provided path is on a ZFS 262873c4903SPrakash Surya * filesystem, so we can use stat instead of readdir to 263873c4903SPrakash Surya * determine if the directory is empty or not. We try to avoid 264873c4903SPrakash Surya * using readdir because that requires opening "dirname"; this 265873c4903SPrakash Surya * open file descriptor can potentially end up in a child 266873c4903SPrakash Surya * process if there's a concurrent fork, thus preventing the 267873c4903SPrakash Surya * zfs_mount() from otherwise succeeding (the open file 268873c4903SPrakash Surya * descriptor inherited by the child process will cause the 269873c4903SPrakash Surya * parent's mount to fail with EBUSY). The performance 270873c4903SPrakash Surya * implications of replacing the open, read, and close with a 271873c4903SPrakash Surya * single stat is nice; but is not the main motivation for the 272873c4903SPrakash Surya * added complexity. 273873c4903SPrakash Surya */ 274873c4903SPrakash Surya return (dir_is_empty_stat(dirname)); 275873c4903SPrakash Surya } 276873c4903SPrakash Surya 277fa9e4066Sahrens /* 278fa9e4066Sahrens * Checks to see if the mount is active. If the filesystem is mounted, we fill 279fa9e4066Sahrens * in 'where' with the current mountpoint, and return 1. Otherwise, we return 280fa9e4066Sahrens * 0. 281fa9e4066Sahrens */ 28299653d4eSeschrock boolean_t 28355434c77Sek is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) 284fa9e4066Sahrens { 285ebedde84SEric Taylor struct mnttab entry; 286fa9e4066Sahrens 287ebedde84SEric Taylor if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) 28899653d4eSeschrock return (B_FALSE); 289fa9e4066Sahrens 290fa9e4066Sahrens if (where != NULL) 29155434c77Sek *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); 292fa9e4066Sahrens 29399653d4eSeschrock return (B_TRUE); 294fa9e4066Sahrens } 295fa9e4066Sahrens 29655434c77Sek boolean_t 29755434c77Sek zfs_is_mounted(zfs_handle_t *zhp, char **where) 29855434c77Sek { 29955434c77Sek return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); 30055434c77Sek } 30155434c77Sek 302e9dbad6fSeschrock /* 303e9dbad6fSeschrock * Returns true if the given dataset is mountable, false otherwise. Returns the 304e9dbad6fSeschrock * mountpoint in 'buf'. 305e9dbad6fSeschrock */ 306e9dbad6fSeschrock static boolean_t 307e9dbad6fSeschrock zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, 308990b4856Slling zprop_source_t *source) 309e9dbad6fSeschrock { 3109adfa60dSMatthew Ahrens char sourceloc[MAXNAMELEN]; 311990b4856Slling zprop_source_t sourcetype; 312e9dbad6fSeschrock 313e9dbad6fSeschrock if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) 314e9dbad6fSeschrock return (B_FALSE); 315e9dbad6fSeschrock 316e9dbad6fSeschrock verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, 317e9dbad6fSeschrock &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); 318e9dbad6fSeschrock 319e9dbad6fSeschrock if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || 320e9dbad6fSeschrock strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) 321e9dbad6fSeschrock return (B_FALSE); 322e9dbad6fSeschrock 323a227b7f4Shs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) 324e9dbad6fSeschrock return (B_FALSE); 325e9dbad6fSeschrock 326e9dbad6fSeschrock if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && 327e9dbad6fSeschrock getzoneid() == GLOBAL_ZONEID) 328e9dbad6fSeschrock return (B_FALSE); 329e9dbad6fSeschrock 330e9dbad6fSeschrock if (source) 331e9dbad6fSeschrock *source = sourcetype; 332e9dbad6fSeschrock 333e9dbad6fSeschrock return (B_TRUE); 334e9dbad6fSeschrock } 335e9dbad6fSeschrock 336fa9e4066Sahrens /* 337fa9e4066Sahrens * Mount the given filesystem. 338fa9e4066Sahrens */ 339fa9e4066Sahrens int 340fa9e4066Sahrens zfs_mount(zfs_handle_t *zhp, const char *options, int flags) 341fa9e4066Sahrens { 342fa9e4066Sahrens struct stat buf; 343fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 344fa9e4066Sahrens char mntopts[MNT_LINE_MAX]; 34599653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 346eb633035STom Caputi uint64_t keystatus; 347eb633035STom Caputi int rc; 348fa9e4066Sahrens 349fa9e4066Sahrens if (options == NULL) 350fa9e4066Sahrens mntopts[0] = '\0'; 351fa9e4066Sahrens else 352fa9e4066Sahrens (void) strlcpy(mntopts, options, sizeof (mntopts)); 353fa9e4066Sahrens 354f9af39baSGeorge Wilson /* 355f9af39baSGeorge Wilson * If the pool is imported read-only then all mounts must be read-only 356f9af39baSGeorge Wilson */ 357f9af39baSGeorge Wilson if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL)) 358f9af39baSGeorge Wilson flags |= MS_RDONLY; 359f9af39baSGeorge Wilson 360e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 36199653d4eSeschrock return (0); 362fa9e4066Sahrens 363eb633035STom Caputi /* 364eb633035STom Caputi * If the filesystem is encrypted the key must be loaded in order to 365eb633035STom Caputi * mount. If the key isn't loaded, the MS_CRYPT flag decides whether 366eb633035STom Caputi * or not we attempt to load the keys. Note: we must call 367eb633035STom Caputi * zfs_refresh_properties() here since some callers of this function 368eb633035STom Caputi * (most notably zpool_enable_datasets()) may implicitly load our key 369eb633035STom Caputi * by loading the parent's key first. 370eb633035STom Caputi */ 371eb633035STom Caputi if (zfs_prop_get_int(zhp, ZFS_PROP_ENCRYPTION) != ZIO_CRYPT_OFF) { 372eb633035STom Caputi zfs_refresh_properties(zhp); 373eb633035STom Caputi keystatus = zfs_prop_get_int(zhp, ZFS_PROP_KEYSTATUS); 374eb633035STom Caputi 375eb633035STom Caputi /* 376eb633035STom Caputi * If the key is unavailable and MS_CRYPT is set give the 377eb633035STom Caputi * user a chance to enter the key. Otherwise just fail 378eb633035STom Caputi * immediately. 379eb633035STom Caputi */ 380eb633035STom Caputi if (keystatus == ZFS_KEYSTATUS_UNAVAILABLE) { 381eb633035STom Caputi if (flags & MS_CRYPT) { 382eb633035STom Caputi rc = zfs_crypto_load_key(zhp, B_FALSE, NULL); 383eb633035STom Caputi if (rc != 0) 384eb633035STom Caputi return (rc); 385eb633035STom Caputi } else { 386eb633035STom Caputi zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 387eb633035STom Caputi "encryption key not loaded")); 388eb633035STom Caputi return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 389eb633035STom Caputi dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 390eb633035STom Caputi mountpoint)); 391eb633035STom Caputi } 392eb633035STom Caputi } 393eb633035STom Caputi 394eb633035STom Caputi } 395eb633035STom Caputi 396fa9e4066Sahrens /* Create the directory if it doesn't already exist */ 397fa9e4066Sahrens if (lstat(mountpoint, &buf) != 0) { 398fa9e4066Sahrens if (mkdirp(mountpoint, 0755) != 0) { 39999653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 40099653d4eSeschrock "failed to create mountpoint")); 401ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 40299653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 40399653d4eSeschrock mountpoint)); 404fa9e4066Sahrens } 405fa9e4066Sahrens } 406fa9e4066Sahrens 407fa9e4066Sahrens /* 408fa9e4066Sahrens * Determine if the mountpoint is empty. If so, refuse to perform the 409fa9e4066Sahrens * mount. We don't perform this check if MS_OVERLAY is specified, which 410fa9e4066Sahrens * would defeat the point. We also avoid this check if 'remount' is 411fa9e4066Sahrens * specified. 412fa9e4066Sahrens */ 413fa9e4066Sahrens if ((flags & MS_OVERLAY) == 0 && 414fa9e4066Sahrens strstr(mntopts, MNTOPT_REMOUNT) == NULL && 415fa9e4066Sahrens !dir_is_empty(mountpoint)) { 41699653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 41799653d4eSeschrock "directory is not empty")); 418ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 41999653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); 420fa9e4066Sahrens } 421fa9e4066Sahrens 422fa9e4066Sahrens /* perform the mount */ 423fa9e4066Sahrens if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, 424fa9e4066Sahrens MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { 425fa9e4066Sahrens /* 426fa9e4066Sahrens * Generic errors are nasty, but there are just way too many 427fa9e4066Sahrens * from mount(), and they're well-understood. We pick a few 428fa9e4066Sahrens * common ones to improve upon. 429fa9e4066Sahrens */ 430d8689a57Sdougm if (errno == EBUSY) { 43199653d4eSeschrock zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 43299653d4eSeschrock "mountpoint or dataset is busy")); 433ecd6cf80Smarks } else if (errno == EPERM) { 434ecd6cf80Smarks zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 435ecd6cf80Smarks "Insufficient privileges")); 43654a91118SChris Kirby } else if (errno == ENOTSUP) { 43754a91118SChris Kirby char buf[256]; 438dc7cd546SMark Shellenbaum int spa_version; 43954a91118SChris Kirby 440dc7cd546SMark Shellenbaum VERIFY(zfs_spa_version(zhp, &spa_version) == 0); 44154a91118SChris Kirby (void) snprintf(buf, sizeof (buf), 442dc7cd546SMark Shellenbaum dgettext(TEXT_DOMAIN, "Can't mount a version %lld " 443dc7cd546SMark Shellenbaum "file system on a version %d pool. Pool must be" 444dc7cd546SMark Shellenbaum " upgraded to mount this file system."), 44554a91118SChris Kirby (u_longlong_t)zfs_prop_get_int(zhp, 446dc7cd546SMark Shellenbaum ZFS_PROP_VERSION), spa_version); 44754a91118SChris Kirby zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); 448d8689a57Sdougm } else { 44999653d4eSeschrock zfs_error_aux(hdl, strerror(errno)); 450d8689a57Sdougm } 451ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 45299653d4eSeschrock dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 45399653d4eSeschrock zhp->zfs_name)); 454fa9e4066Sahrens } 455fa9e4066Sahrens 456ebedde84SEric Taylor /* add the mounted entry into our cache */ 457ebedde84SEric Taylor libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, 458ebedde84SEric Taylor mntopts); 459fa9e4066Sahrens return (0); 460fa9e4066Sahrens } 461fa9e4066Sahrens 4623bb79becSeschrock /* 4633bb79becSeschrock * Unmount a single filesystem. 4643bb79becSeschrock */ 4653bb79becSeschrock static int 4663bb79becSeschrock unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) 4673bb79becSeschrock { 4683bb79becSeschrock if (umount2(mountpoint, flags) != 0) { 4693bb79becSeschrock zfs_error_aux(hdl, strerror(errno)); 470ece3d9b3Slling return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, 4713bb79becSeschrock dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), 4723bb79becSeschrock mountpoint)); 4733bb79becSeschrock } 4743bb79becSeschrock 4753bb79becSeschrock return (0); 4763bb79becSeschrock } 4773bb79becSeschrock 478fa9e4066Sahrens /* 479fa9e4066Sahrens * Unmount the given filesystem. 480fa9e4066Sahrens */ 481fa9e4066Sahrens int 482fa9e4066Sahrens zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) 483fa9e4066Sahrens { 484ebedde84SEric Taylor libzfs_handle_t *hdl = zhp->zfs_hdl; 485ebedde84SEric Taylor struct mnttab entry; 48667331909Sdougm char *mntpt = NULL; 487fa9e4066Sahrens 488ebedde84SEric Taylor /* check to see if we need to unmount the filesystem */ 489fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 490ebedde84SEric Taylor libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { 49167331909Sdougm /* 49267331909Sdougm * mountpoint may have come from a call to 49367331909Sdougm * getmnt/getmntany if it isn't NULL. If it is NULL, 494ebedde84SEric Taylor * we know it comes from libzfs_mnttab_find which can 495ebedde84SEric Taylor * then get freed later. We strdup it to play it safe. 49667331909Sdougm */ 497fa9e4066Sahrens if (mountpoint == NULL) 498ebedde84SEric Taylor mntpt = zfs_strdup(hdl, entry.mnt_mountp); 49967331909Sdougm else 500ebedde84SEric Taylor mntpt = zfs_strdup(hdl, mountpoint); 501fa9e4066Sahrens 502fa9e4066Sahrens /* 5033bb79becSeschrock * Unshare and unmount the filesystem 504fa9e4066Sahrens */ 505da6c28aaSamw if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) 506eb66cf86Sth return (-1); 507eb66cf86Sth 508ebedde84SEric Taylor if (unmount_one(hdl, mntpt, flags) != 0) { 50967331909Sdougm free(mntpt); 510da6c28aaSamw (void) zfs_shareall(zhp); 511fa9e4066Sahrens return (-1); 51267331909Sdougm } 513ebedde84SEric Taylor libzfs_mnttab_remove(hdl, zhp->zfs_name); 51467331909Sdougm free(mntpt); 515fa9e4066Sahrens } 516fa9e4066Sahrens 517fa9e4066Sahrens return (0); 518fa9e4066Sahrens } 519fa9e4066Sahrens 520fa9e4066Sahrens /* 521fa9e4066Sahrens * Unmount this filesystem and any children inheriting the mountpoint property. 522fa9e4066Sahrens * To do this, just act like we're changing the mountpoint property, but don't 523fa9e4066Sahrens * remount the filesystems afterwards. 524fa9e4066Sahrens */ 525fa9e4066Sahrens int 526fa9e4066Sahrens zfs_unmountall(zfs_handle_t *zhp, int flags) 527fa9e4066Sahrens { 528fa9e4066Sahrens prop_changelist_t *clp; 529fa9e4066Sahrens int ret; 530fa9e4066Sahrens 5310069fd67STim Haley clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); 532fa9e4066Sahrens if (clp == NULL) 533fa9e4066Sahrens return (-1); 534fa9e4066Sahrens 535fa9e4066Sahrens ret = changelist_prefix(clp); 536fa9e4066Sahrens changelist_free(clp); 537fa9e4066Sahrens 538fa9e4066Sahrens return (ret); 539fa9e4066Sahrens } 540fa9e4066Sahrens 541f3861e1aSahl boolean_t 542f3861e1aSahl zfs_is_shared(zfs_handle_t *zhp) 543f3861e1aSahl { 544da6c28aaSamw zfs_share_type_t rc = 0; 545da6c28aaSamw zfs_share_proto_t *curr_proto; 546da6c28aaSamw 547f3861e1aSahl if (ZFS_IS_VOLUME(zhp)) 548ab003da8SJim Dunham return (B_FALSE); 549f3861e1aSahl 550da6c28aaSamw for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 551da6c28aaSamw curr_proto++) 552da6c28aaSamw rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); 553da6c28aaSamw 554da6c28aaSamw return (rc ? B_TRUE : B_FALSE); 555f3861e1aSahl } 556f3861e1aSahl 557f3861e1aSahl int 558f3861e1aSahl zfs_share(zfs_handle_t *zhp) 559f3861e1aSahl { 5609d9a58e3SEric Taylor assert(!ZFS_IS_VOLUME(zhp)); 561da6c28aaSamw return (zfs_share_proto(zhp, share_all_proto)); 562f3861e1aSahl } 563f3861e1aSahl 564f3861e1aSahl int 565f3861e1aSahl zfs_unshare(zfs_handle_t *zhp) 566f3861e1aSahl { 5679d9a58e3SEric Taylor assert(!ZFS_IS_VOLUME(zhp)); 568da6c28aaSamw return (zfs_unshareall(zhp)); 569f3861e1aSahl } 570f3861e1aSahl 571fa9e4066Sahrens /* 572fa9e4066Sahrens * Check to see if the filesystem is currently shared. 573fa9e4066Sahrens */ 574da6c28aaSamw zfs_share_type_t 575da6c28aaSamw zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) 576fa9e4066Sahrens { 577fa9e4066Sahrens char *mountpoint; 578da6c28aaSamw zfs_share_type_t rc; 579fa9e4066Sahrens 580fa9e4066Sahrens if (!zfs_is_mounted(zhp, &mountpoint)) 581da6c28aaSamw return (SHARED_NOT_SHARED); 582fa9e4066Sahrens 58388f61deeSIgor Kozhukhov if ((rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) 58488f61deeSIgor Kozhukhov != SHARED_NOT_SHARED) { 585fa9e4066Sahrens if (where != NULL) 586fa9e4066Sahrens *where = mountpoint; 587fa9e4066Sahrens else 588fa9e4066Sahrens free(mountpoint); 589da6c28aaSamw return (rc); 590fa9e4066Sahrens } else { 591fa9e4066Sahrens free(mountpoint); 592da6c28aaSamw return (SHARED_NOT_SHARED); 593fa9e4066Sahrens } 594fa9e4066Sahrens } 595fa9e4066Sahrens 596da6c28aaSamw boolean_t 597da6c28aaSamw zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) 598da6c28aaSamw { 599da6c28aaSamw return (zfs_is_shared_proto(zhp, where, 600da6c28aaSamw PROTO_NFS) != SHARED_NOT_SHARED); 601da6c28aaSamw } 602da6c28aaSamw 603da6c28aaSamw boolean_t 604da6c28aaSamw zfs_is_shared_smb(zfs_handle_t *zhp, char **where) 605da6c28aaSamw { 606da6c28aaSamw return (zfs_is_shared_proto(zhp, where, 607da6c28aaSamw PROTO_SMB) != SHARED_NOT_SHARED); 608da6c28aaSamw } 609da6c28aaSamw 61067331909Sdougm /* 61167331909Sdougm * Make sure things will work if libshare isn't installed by using 61267331909Sdougm * wrapper functions that check to see that the pointers to functions 61367331909Sdougm * initialized in _zfs_init_libshare() are actually present. 61467331909Sdougm */ 61567331909Sdougm 61667331909Sdougm static sa_handle_t (*_sa_init)(int); 6178a981c33SDaniel Hoffman static sa_handle_t (*_sa_init_arg)(int, void *); 618b8dc1b43SJoyce McIntosh static int (*_sa_service)(sa_handle_t); 61967331909Sdougm static void (*_sa_fini)(sa_handle_t); 62067331909Sdougm static sa_share_t (*_sa_find_share)(sa_handle_t, char *); 62167331909Sdougm static int (*_sa_enable_share)(sa_share_t, char *); 62267331909Sdougm static int (*_sa_disable_share)(sa_share_t, char *); 62367331909Sdougm static char *(*_sa_errorstr)(int); 62467331909Sdougm static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); 6255b6e0c46Sdougm static boolean_t (*_sa_needs_refresh)(sa_handle_t *); 6265b6e0c46Sdougm static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); 627*0dfe541eSEvan Layton static int (* _sa_get_zfs_share)(sa_handle_t, char *, zfs_handle_t *); 6285b6e0c46Sdougm static void (*_sa_update_sharetab_ts)(sa_handle_t); 62967331909Sdougm 63067331909Sdougm /* 63167331909Sdougm * _zfs_init_libshare() 63267331909Sdougm * 63367331909Sdougm * Find the libshare.so.1 entry points that we use here and save the 63467331909Sdougm * values to be used later. This is triggered by the runtime loader. 63567331909Sdougm * Make sure the correct ISA version is loaded. 63667331909Sdougm */ 6375b6e0c46Sdougm 63867331909Sdougm #pragma init(_zfs_init_libshare) 63967331909Sdougm static void 64067331909Sdougm _zfs_init_libshare(void) 64167331909Sdougm { 64267331909Sdougm void *libshare; 64367331909Sdougm char path[MAXPATHLEN]; 64467331909Sdougm char isa[MAXISALEN]; 64567331909Sdougm 64667331909Sdougm #if defined(_LP64) 64767331909Sdougm if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) 648d8689a57Sdougm isa[0] = '\0'; 64967331909Sdougm #else 65067331909Sdougm isa[0] = '\0'; 65167331909Sdougm #endif 65267331909Sdougm (void) snprintf(path, MAXPATHLEN, 653d8689a57Sdougm "/usr/lib/%s/libshare.so.1", isa); 65467331909Sdougm 65567331909Sdougm if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { 656d8689a57Sdougm _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); 6578a981c33SDaniel Hoffman _sa_init_arg = (sa_handle_t (*)(int, void *))dlsym(libshare, 6588a981c33SDaniel Hoffman "sa_init_arg"); 659d8689a57Sdougm _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); 660b8dc1b43SJoyce McIntosh _sa_service = (int (*)(sa_handle_t))dlsym(libshare, 661b8dc1b43SJoyce McIntosh "sa_service"); 662d8689a57Sdougm _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) 663d8689a57Sdougm dlsym(libshare, "sa_find_share"); 664d8689a57Sdougm _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 665d8689a57Sdougm "sa_enable_share"); 666d8689a57Sdougm _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 667d8689a57Sdougm "sa_disable_share"); 668d8689a57Sdougm _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); 669d8689a57Sdougm _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) 670d8689a57Sdougm dlsym(libshare, "sa_parse_legacy_options"); 6715b6e0c46Sdougm _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) 6725b6e0c46Sdougm dlsym(libshare, "sa_needs_refresh"); 6735b6e0c46Sdougm _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) 6745b6e0c46Sdougm dlsym(libshare, "sa_get_zfs_handle"); 675*0dfe541eSEvan Layton _sa_get_zfs_share = (int (*)(sa_handle_t, char *, 676*0dfe541eSEvan Layton zfs_handle_t *)) dlsym(libshare, "sa_get_zfs_share"); 6775b6e0c46Sdougm _sa_update_sharetab_ts = (void (*)(sa_handle_t)) 6785b6e0c46Sdougm dlsym(libshare, "sa_update_sharetab_ts"); 6798a981c33SDaniel Hoffman if (_sa_init == NULL || _sa_init_arg == NULL || 6808a981c33SDaniel Hoffman _sa_fini == NULL || _sa_find_share == NULL || 6818a981c33SDaniel Hoffman _sa_enable_share == NULL || _sa_disable_share == NULL || 6828a981c33SDaniel Hoffman _sa_errorstr == NULL || _sa_parse_legacy_options == NULL || 6835b6e0c46Sdougm _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || 684*0dfe541eSEvan Layton _sa_get_zfs_share == NULL || _sa_service == NULL || 6855b6e0c46Sdougm _sa_update_sharetab_ts == NULL) { 68657b448deSdougm _sa_init = NULL; 6878a981c33SDaniel Hoffman _sa_init_arg = NULL; 688b8dc1b43SJoyce McIntosh _sa_service = NULL; 68957b448deSdougm _sa_fini = NULL; 69057b448deSdougm _sa_disable_share = NULL; 69157b448deSdougm _sa_enable_share = NULL; 69257b448deSdougm _sa_errorstr = NULL; 69357b448deSdougm _sa_parse_legacy_options = NULL; 69457b448deSdougm (void) dlclose(libshare); 6955b6e0c46Sdougm _sa_needs_refresh = NULL; 6965b6e0c46Sdougm _sa_get_zfs_handle = NULL; 697*0dfe541eSEvan Layton _sa_get_zfs_share = NULL; 6985b6e0c46Sdougm _sa_update_sharetab_ts = NULL; 69957b448deSdougm } 70067331909Sdougm } 70167331909Sdougm } 70267331909Sdougm 70367331909Sdougm /* 70467331909Sdougm * zfs_init_libshare(zhandle, service) 70567331909Sdougm * 70667331909Sdougm * Initialize the libshare API if it hasn't already been initialized. 70767331909Sdougm * In all cases it returns 0 if it succeeded and an error if not. The 70867331909Sdougm * service value is which part(s) of the API to initialize and is a 70967331909Sdougm * direct map to the libshare sa_init(service) interface. 71067331909Sdougm */ 7118a981c33SDaniel Hoffman static int 7128a981c33SDaniel Hoffman zfs_init_libshare_impl(libzfs_handle_t *zhandle, int service, void *arg) 71367331909Sdougm { 7141c18e8fbSJerry Jelinek /* 7151c18e8fbSJerry Jelinek * libshare is either not installed or we're in a branded zone. The 7161c18e8fbSJerry Jelinek * rest of the wrapper functions around the libshare calls already 7171c18e8fbSJerry Jelinek * handle NULL function pointers, but we don't want the callers of 7181c18e8fbSJerry Jelinek * zfs_init_libshare() to fail prematurely if libshare is not available. 7191c18e8fbSJerry Jelinek */ 720d8689a57Sdougm if (_sa_init == NULL) 7211c18e8fbSJerry Jelinek return (SA_OK); 722d8689a57Sdougm 72309c9e6dcSChris Williamson /* 72409c9e6dcSChris Williamson * Attempt to refresh libshare. This is necessary if there was a cache 72509c9e6dcSChris Williamson * miss for a new ZFS dataset that was just created, or if state of the 72609c9e6dcSChris Williamson * sharetab file has changed since libshare was last initialized. We 72709c9e6dcSChris Williamson * want to make sure so check timestamps to see if a different process 72809c9e6dcSChris Williamson * has updated any of the configuration. If there was some non-ZFS 72909c9e6dcSChris Williamson * change, we need to re-initialize the internal cache. 73009c9e6dcSChris Williamson */ 73109c9e6dcSChris Williamson if (_sa_needs_refresh != NULL && 73209c9e6dcSChris Williamson _sa_needs_refresh(zhandle->libzfs_sharehdl)) { 73309c9e6dcSChris Williamson zfs_uninit_libshare(zhandle); 7348a981c33SDaniel Hoffman zhandle->libzfs_sharehdl = _sa_init_arg(service, arg); 7355b6e0c46Sdougm } 7365b6e0c46Sdougm 73709c9e6dcSChris Williamson if (zhandle && zhandle->libzfs_sharehdl == NULL) 7388a981c33SDaniel Hoffman zhandle->libzfs_sharehdl = _sa_init_arg(service, arg); 739d8689a57Sdougm 74009c9e6dcSChris Williamson if (zhandle->libzfs_sharehdl == NULL) 74109c9e6dcSChris Williamson return (SA_NO_MEMORY); 742d8689a57Sdougm 74309c9e6dcSChris Williamson return (SA_OK); 74467331909Sdougm } 7458a981c33SDaniel Hoffman int 7468a981c33SDaniel Hoffman zfs_init_libshare(libzfs_handle_t *zhandle, int service) 7478a981c33SDaniel Hoffman { 7488a981c33SDaniel Hoffman return (zfs_init_libshare_impl(zhandle, service, NULL)); 7498a981c33SDaniel Hoffman } 7508a981c33SDaniel Hoffman 7518a981c33SDaniel Hoffman int 7528a981c33SDaniel Hoffman zfs_init_libshare_arg(libzfs_handle_t *zhandle, int service, void *arg) 7538a981c33SDaniel Hoffman { 7548a981c33SDaniel Hoffman return (zfs_init_libshare_impl(zhandle, service, arg)); 7558a981c33SDaniel Hoffman } 7568a981c33SDaniel Hoffman 75767331909Sdougm 75867331909Sdougm /* 75967331909Sdougm * zfs_uninit_libshare(zhandle) 76067331909Sdougm * 76167331909Sdougm * Uninitialize the libshare API if it hasn't already been 76267331909Sdougm * uninitialized. It is OK to call multiple times. 76367331909Sdougm */ 76467331909Sdougm void 76567331909Sdougm zfs_uninit_libshare(libzfs_handle_t *zhandle) 76667331909Sdougm { 76767331909Sdougm if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { 768d8689a57Sdougm if (_sa_fini != NULL) 769d8689a57Sdougm _sa_fini(zhandle->libzfs_sharehdl); 770d8689a57Sdougm zhandle->libzfs_sharehdl = NULL; 77167331909Sdougm } 77267331909Sdougm } 77367331909Sdougm 77467331909Sdougm /* 77567331909Sdougm * zfs_parse_options(options, proto) 77667331909Sdougm * 77767331909Sdougm * Call the legacy parse interface to get the protocol specific 77867331909Sdougm * options using the NULL arg to indicate that this is a "parse" only. 77967331909Sdougm */ 78067331909Sdougm int 781da6c28aaSamw zfs_parse_options(char *options, zfs_share_proto_t proto) 78267331909Sdougm { 7833cb34c60Sahrens if (_sa_parse_legacy_options != NULL) { 7843cb34c60Sahrens return (_sa_parse_legacy_options(NULL, options, 7853cb34c60Sahrens proto_table[proto].p_name)); 7863cb34c60Sahrens } 7873cb34c60Sahrens return (SA_CONFIG_ERR); 78867331909Sdougm } 78967331909Sdougm 79067331909Sdougm /* 79167331909Sdougm * zfs_sa_find_share(handle, path) 79267331909Sdougm * 79367331909Sdougm * wrapper around sa_find_share to find a share path in the 79467331909Sdougm * configuration. 79567331909Sdougm */ 79667331909Sdougm static sa_share_t 79767331909Sdougm zfs_sa_find_share(sa_handle_t handle, char *path) 79867331909Sdougm { 79967331909Sdougm if (_sa_find_share != NULL) 800d8689a57Sdougm return (_sa_find_share(handle, path)); 80167331909Sdougm return (NULL); 80267331909Sdougm } 80367331909Sdougm 80467331909Sdougm /* 80567331909Sdougm * zfs_sa_enable_share(share, proto) 80667331909Sdougm * 80767331909Sdougm * Wrapper for sa_enable_share which enables a share for a specified 80867331909Sdougm * protocol. 80967331909Sdougm */ 81067331909Sdougm static int 81167331909Sdougm zfs_sa_enable_share(sa_share_t share, char *proto) 81267331909Sdougm { 81367331909Sdougm if (_sa_enable_share != NULL) 814d8689a57Sdougm return (_sa_enable_share(share, proto)); 81567331909Sdougm return (SA_CONFIG_ERR); 81667331909Sdougm } 81767331909Sdougm 81867331909Sdougm /* 81967331909Sdougm * zfs_sa_disable_share(share, proto) 82067331909Sdougm * 82167331909Sdougm * Wrapper for sa_enable_share which disables a share for a specified 82267331909Sdougm * protocol. 82367331909Sdougm */ 82467331909Sdougm static int 82567331909Sdougm zfs_sa_disable_share(sa_share_t share, char *proto) 82667331909Sdougm { 82767331909Sdougm if (_sa_disable_share != NULL) 828d8689a57Sdougm return (_sa_disable_share(share, proto)); 82967331909Sdougm return (SA_CONFIG_ERR); 83067331909Sdougm } 83167331909Sdougm 832fa9e4066Sahrens /* 833da6c28aaSamw * Share the given filesystem according to the options in the specified 834da6c28aaSamw * protocol specific properties (sharenfs, sharesmb). We rely 83567331909Sdougm * on "libshare" to the dirty work for us. 836fa9e4066Sahrens */ 837da6c28aaSamw static int 838da6c28aaSamw zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 839fa9e4066Sahrens { 840fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 841fa9e4066Sahrens char shareopts[ZFS_MAXPROPLEN]; 8425b6e0c46Sdougm char sourcestr[ZFS_MAXPROPLEN]; 84399653d4eSeschrock libzfs_handle_t *hdl = zhp->zfs_hdl; 84467331909Sdougm sa_share_t share; 845da6c28aaSamw zfs_share_proto_t *curr_proto; 8465b6e0c46Sdougm zprop_source_t sourcetype; 847b8dc1b43SJoyce McIntosh int service = SA_INIT_ONE_SHARE_FROM_HANDLE; 84867331909Sdougm int ret; 849fa9e4066Sahrens 850e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 851fa9e4066Sahrens return (0); 852fa9e4066Sahrens 853b8dc1b43SJoyce McIntosh /* 854b8dc1b43SJoyce McIntosh * Function may be called in a loop from higher up stack, with libshare 855b8dc1b43SJoyce McIntosh * initialized for multiple shares (SA_INIT_SHARE_API_SELECTIVE). 856b8dc1b43SJoyce McIntosh * zfs_init_libshare_arg will refresh the handle's cache if necessary. 857b8dc1b43SJoyce McIntosh * In this case we do not want to switch to per share initialization. 858b8dc1b43SJoyce McIntosh * Specify SA_INIT_SHARE_API to do full refresh, if refresh required. 859b8dc1b43SJoyce McIntosh */ 860b8dc1b43SJoyce McIntosh if ((hdl->libzfs_sharehdl != NULL) && (_sa_service != NULL) && 861b8dc1b43SJoyce McIntosh (_sa_service(hdl->libzfs_sharehdl) == 862b8dc1b43SJoyce McIntosh SA_INIT_SHARE_API_SELECTIVE)) { 863b8dc1b43SJoyce McIntosh service = SA_INIT_SHARE_API; 864b8dc1b43SJoyce McIntosh } 865b8dc1b43SJoyce McIntosh 866da6c28aaSamw for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { 867da6c28aaSamw /* 868da6c28aaSamw * Return success if there are no share options. 869da6c28aaSamw */ 870da6c28aaSamw if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, 8715b6e0c46Sdougm shareopts, sizeof (shareopts), &sourcetype, sourcestr, 8725b6e0c46Sdougm ZFS_MAXPROPLEN, B_FALSE) != 0 || 8735b6e0c46Sdougm strcmp(shareopts, "off") == 0) 874da6c28aaSamw continue; 875b8dc1b43SJoyce McIntosh ret = zfs_init_libshare_arg(hdl, service, zhp); 87633cde0d0SMatthew Ahrens if (ret != SA_OK) { 87733cde0d0SMatthew Ahrens (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 87833cde0d0SMatthew Ahrens dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), 87933cde0d0SMatthew Ahrens zfs_get_name(zhp), _sa_errorstr != NULL ? 88033cde0d0SMatthew Ahrens _sa_errorstr(ret) : ""); 88133cde0d0SMatthew Ahrens return (-1); 88233cde0d0SMatthew Ahrens } 88333cde0d0SMatthew Ahrens 884da6c28aaSamw share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); 8855b6e0c46Sdougm if (share == NULL) { 8865b6e0c46Sdougm /* 8875b6e0c46Sdougm * This may be a new file system that was just 888*0dfe541eSEvan Layton * created so isn't in the internal cache. 889*0dfe541eSEvan Layton * Rather than reloading the entire configuration, 890*0dfe541eSEvan Layton * we can add just this one share to the cache. 8915b6e0c46Sdougm */ 892*0dfe541eSEvan Layton if ((_sa_get_zfs_share == NULL) || 893*0dfe541eSEvan Layton (_sa_get_zfs_share(hdl->libzfs_sharehdl, "zfs", zhp) 894*0dfe541eSEvan Layton != SA_OK)) { 8955b6e0c46Sdougm (void) zfs_error_fmt(hdl, 8965b6e0c46Sdougm proto_table[*curr_proto].p_share_err, 8975b6e0c46Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 8985b6e0c46Sdougm zfs_get_name(zhp)); 8995b6e0c46Sdougm return (-1); 9005b6e0c46Sdougm } 9015b6e0c46Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, 9025b6e0c46Sdougm mountpoint); 9035b6e0c46Sdougm } 904da6c28aaSamw if (share != NULL) { 905da6c28aaSamw int err; 906da6c28aaSamw err = zfs_sa_enable_share(share, 907da6c28aaSamw proto_table[*curr_proto].p_name); 908da6c28aaSamw if (err != SA_OK) { 909da6c28aaSamw (void) zfs_error_fmt(hdl, 910da6c28aaSamw proto_table[*curr_proto].p_share_err, 911da6c28aaSamw dgettext(TEXT_DOMAIN, "cannot share '%s'"), 912da6c28aaSamw zfs_get_name(zhp)); 913da6c28aaSamw return (-1); 914da6c28aaSamw } 915da6c28aaSamw } else { 916da6c28aaSamw (void) zfs_error_fmt(hdl, 917da6c28aaSamw proto_table[*curr_proto].p_share_err, 918d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot share '%s'"), 919d8689a57Sdougm zfs_get_name(zhp)); 920d8689a57Sdougm return (-1); 921d8689a57Sdougm } 922fa9e4066Sahrens 923da6c28aaSamw } 924fa9e4066Sahrens return (0); 925fa9e4066Sahrens } 926fa9e4066Sahrens 927da6c28aaSamw 928da6c28aaSamw int 929da6c28aaSamw zfs_share_nfs(zfs_handle_t *zhp) 930da6c28aaSamw { 931da6c28aaSamw return (zfs_share_proto(zhp, nfs_only)); 932da6c28aaSamw } 933da6c28aaSamw 934da6c28aaSamw int 935da6c28aaSamw zfs_share_smb(zfs_handle_t *zhp) 936da6c28aaSamw { 937da6c28aaSamw return (zfs_share_proto(zhp, smb_only)); 938da6c28aaSamw } 939da6c28aaSamw 940da6c28aaSamw int 941da6c28aaSamw zfs_shareall(zfs_handle_t *zhp) 942da6c28aaSamw { 943da6c28aaSamw return (zfs_share_proto(zhp, share_all_proto)); 944da6c28aaSamw } 945da6c28aaSamw 9463bb79becSeschrock /* 9473bb79becSeschrock * Unshare a filesystem by mountpoint. 9483bb79becSeschrock */ 9493bb79becSeschrock static int 950da6c28aaSamw unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, 951da6c28aaSamw zfs_share_proto_t proto) 9523bb79becSeschrock { 95367331909Sdougm sa_share_t share; 95467331909Sdougm int err; 95567331909Sdougm char *mntpt; 956b8dc1b43SJoyce McIntosh int service = SA_INIT_ONE_SHARE_FROM_NAME; 9578a981c33SDaniel Hoffman 9583bb79becSeschrock /* 95967331909Sdougm * Mountpoint could get trashed if libshare calls getmntany 960ebedde84SEric Taylor * which it does during API initialization, so strdup the 96167331909Sdougm * value. 9623bb79becSeschrock */ 96367331909Sdougm mntpt = zfs_strdup(hdl, mountpoint); 9643bb79becSeschrock 9658a981c33SDaniel Hoffman /* 966b8dc1b43SJoyce McIntosh * Function may be called in a loop from higher up stack, with libshare 967b8dc1b43SJoyce McIntosh * initialized for multiple shares (SA_INIT_SHARE_API_SELECTIVE). 968b8dc1b43SJoyce McIntosh * zfs_init_libshare_arg will refresh the handle's cache if necessary. 969b8dc1b43SJoyce McIntosh * In this case we do not want to switch to per share initialization. 970b8dc1b43SJoyce McIntosh * Specify SA_INIT_SHARE_API to do full refresh, if refresh required. 9718a981c33SDaniel Hoffman */ 972b8dc1b43SJoyce McIntosh if ((hdl->libzfs_sharehdl != NULL) && (_sa_service != NULL) && 973b8dc1b43SJoyce McIntosh (_sa_service(hdl->libzfs_sharehdl) == 974b8dc1b43SJoyce McIntosh SA_INIT_SHARE_API_SELECTIVE)) { 975b8dc1b43SJoyce McIntosh service = SA_INIT_SHARE_API; 976b8dc1b43SJoyce McIntosh } 977b8dc1b43SJoyce McIntosh 978b8dc1b43SJoyce McIntosh err = zfs_init_libshare_arg(hdl, service, (void *)name); 979b8dc1b43SJoyce McIntosh if (err != SA_OK) { 98067331909Sdougm free(mntpt); /* don't need the copy anymore */ 9814f4378ccSAndrew Stormont return (zfs_error_fmt(hdl, proto_table[proto].p_unshare_err, 982d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 983d8689a57Sdougm name, _sa_errorstr(err))); 98467331909Sdougm } 9853bb79becSeschrock 98667331909Sdougm share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); 98767331909Sdougm free(mntpt); /* don't need the copy anymore */ 9883bb79becSeschrock 98967331909Sdougm if (share != NULL) { 990da6c28aaSamw err = zfs_sa_disable_share(share, proto_table[proto].p_name); 99167331909Sdougm if (err != SA_OK) { 9924f4378ccSAndrew Stormont return (zfs_error_fmt(hdl, 9934f4378ccSAndrew Stormont proto_table[proto].p_unshare_err, 994d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 995d8689a57Sdougm name, _sa_errorstr(err))); 99667331909Sdougm } 99767331909Sdougm } else { 9984f4378ccSAndrew Stormont return (zfs_error_fmt(hdl, proto_table[proto].p_unshare_err, 999d8689a57Sdougm dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), 1000d8689a57Sdougm name)); 10013bb79becSeschrock } 10023bb79becSeschrock return (0); 10033bb79becSeschrock } 10043bb79becSeschrock 1005fa9e4066Sahrens /* 1006fa9e4066Sahrens * Unshare the given filesystem. 1007fa9e4066Sahrens */ 1008fa9e4066Sahrens int 1009da6c28aaSamw zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, 1010da6c28aaSamw zfs_share_proto_t *proto) 1011fa9e4066Sahrens { 1012ebedde84SEric Taylor libzfs_handle_t *hdl = zhp->zfs_hdl; 1013ebedde84SEric Taylor struct mnttab entry; 101467331909Sdougm char *mntpt = NULL; 1015fa9e4066Sahrens 1016fa9e4066Sahrens /* check to see if need to unmount the filesystem */ 101799653d4eSeschrock rewind(zhp->zfs_hdl->libzfs_mnttab); 1018d8689a57Sdougm if (mountpoint != NULL) 1019ebedde84SEric Taylor mountpoint = mntpt = zfs_strdup(hdl, mountpoint); 1020d8689a57Sdougm 1021fa9e4066Sahrens if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 1022ebedde84SEric Taylor libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { 1023da6c28aaSamw zfs_share_proto_t *curr_proto; 1024fa9e4066Sahrens 1025fa9e4066Sahrens if (mountpoint == NULL) 1026da6c28aaSamw mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); 1027fa9e4066Sahrens 1028da6c28aaSamw for (curr_proto = proto; *curr_proto != PROTO_END; 1029da6c28aaSamw curr_proto++) { 1030da6c28aaSamw 1031ebedde84SEric Taylor if (is_shared(hdl, mntpt, *curr_proto) && 1032ebedde84SEric Taylor unshare_one(hdl, zhp->zfs_name, 1033da6c28aaSamw mntpt, *curr_proto) != 0) { 1034da6c28aaSamw if (mntpt != NULL) 1035da6c28aaSamw free(mntpt); 1036da6c28aaSamw return (-1); 1037da6c28aaSamw } 103867331909Sdougm } 1039fa9e4066Sahrens } 104067331909Sdougm if (mntpt != NULL) 1041d8689a57Sdougm free(mntpt); 1042fa9e4066Sahrens 1043fa9e4066Sahrens return (0); 1044fa9e4066Sahrens } 1045fa9e4066Sahrens 1046da6c28aaSamw int 1047da6c28aaSamw zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) 1048da6c28aaSamw { 1049da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); 1050da6c28aaSamw } 1051da6c28aaSamw 1052da6c28aaSamw int 1053da6c28aaSamw zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) 1054da6c28aaSamw { 1055da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, smb_only)); 1056da6c28aaSamw } 1057da6c28aaSamw 1058fa9e4066Sahrens /* 1059da6c28aaSamw * Same as zfs_unmountall(), but for NFS and SMB unshares. 1060fa9e4066Sahrens */ 1061fa9e4066Sahrens int 1062da6c28aaSamw zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 1063fa9e4066Sahrens { 1064fa9e4066Sahrens prop_changelist_t *clp; 1065fa9e4066Sahrens int ret; 1066fa9e4066Sahrens 10670069fd67STim Haley clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); 1068fa9e4066Sahrens if (clp == NULL) 1069fa9e4066Sahrens return (-1); 1070fa9e4066Sahrens 1071da6c28aaSamw ret = changelist_unshare(clp, proto); 1072fa9e4066Sahrens changelist_free(clp); 1073fa9e4066Sahrens 1074fa9e4066Sahrens return (ret); 1075fa9e4066Sahrens } 1076fa9e4066Sahrens 1077da6c28aaSamw int 1078da6c28aaSamw zfs_unshareall_nfs(zfs_handle_t *zhp) 1079da6c28aaSamw { 1080da6c28aaSamw return (zfs_unshareall_proto(zhp, nfs_only)); 1081da6c28aaSamw } 1082da6c28aaSamw 1083da6c28aaSamw int 1084da6c28aaSamw zfs_unshareall_smb(zfs_handle_t *zhp) 1085da6c28aaSamw { 1086da6c28aaSamw return (zfs_unshareall_proto(zhp, smb_only)); 1087da6c28aaSamw } 1088da6c28aaSamw 1089da6c28aaSamw int 1090da6c28aaSamw zfs_unshareall(zfs_handle_t *zhp) 1091da6c28aaSamw { 1092da6c28aaSamw return (zfs_unshareall_proto(zhp, share_all_proto)); 1093da6c28aaSamw } 1094da6c28aaSamw 1095da6c28aaSamw int 1096da6c28aaSamw zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) 1097da6c28aaSamw { 1098da6c28aaSamw return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); 1099da6c28aaSamw } 1100da6c28aaSamw 1101fa9e4066Sahrens /* 1102fa9e4066Sahrens * Remove the mountpoint associated with the current dataset, if necessary. 1103fa9e4066Sahrens * We only remove the underlying directory if: 1104fa9e4066Sahrens * 1105fa9e4066Sahrens * - The mountpoint is not 'none' or 'legacy' 1106fa9e4066Sahrens * - The mountpoint is non-empty 1107fa9e4066Sahrens * - The mountpoint is the default or inherited 1108fa9e4066Sahrens * - The 'zoned' property is set, or we're in a local zone 1109fa9e4066Sahrens * 1110fa9e4066Sahrens * Any other directories we leave alone. 1111fa9e4066Sahrens */ 1112fa9e4066Sahrens void 1113fa9e4066Sahrens remove_mountpoint(zfs_handle_t *zhp) 1114fa9e4066Sahrens { 1115fa9e4066Sahrens char mountpoint[ZFS_MAXPROPLEN]; 1116990b4856Slling zprop_source_t source; 1117fa9e4066Sahrens 1118e9dbad6fSeschrock if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), 1119e9dbad6fSeschrock &source)) 1120fa9e4066Sahrens return; 1121fa9e4066Sahrens 1122990b4856Slling if (source == ZPROP_SRC_DEFAULT || 1123990b4856Slling source == ZPROP_SRC_INHERITED) { 1124fa9e4066Sahrens /* 1125fa9e4066Sahrens * Try to remove the directory, silently ignoring any errors. 1126fa9e4066Sahrens * The filesystem may have since been removed or moved around, 1127e9dbad6fSeschrock * and this error isn't really useful to the administrator in 1128e9dbad6fSeschrock * any way. 1129fa9e4066Sahrens */ 1130fa9e4066Sahrens (void) rmdir(mountpoint); 1131fa9e4066Sahrens } 1132fa9e4066Sahrens } 11333bb79becSeschrock 1134591e0e13SSebastien Roy /* 1135591e0e13SSebastien Roy * Add the given zfs handle to the cb_handles array, dynamically reallocating 1136591e0e13SSebastien Roy * the array if it is out of space. 1137591e0e13SSebastien Roy */ 11389d9a58e3SEric Taylor void 11399d9a58e3SEric Taylor libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp) 11409d9a58e3SEric Taylor { 11419d9a58e3SEric Taylor if (cbp->cb_alloc == cbp->cb_used) { 11429d9a58e3SEric Taylor size_t newsz; 1143591e0e13SSebastien Roy zfs_handle_t **newhandles; 11449d9a58e3SEric Taylor 1145591e0e13SSebastien Roy newsz = cbp->cb_alloc != 0 ? cbp->cb_alloc * 2 : 64; 1146591e0e13SSebastien Roy newhandles = zfs_realloc(zhp->zfs_hdl, 1147591e0e13SSebastien Roy cbp->cb_handles, cbp->cb_alloc * sizeof (zfs_handle_t *), 1148591e0e13SSebastien Roy newsz * sizeof (zfs_handle_t *)); 1149591e0e13SSebastien Roy cbp->cb_handles = newhandles; 11509d9a58e3SEric Taylor cbp->cb_alloc = newsz; 11519d9a58e3SEric Taylor } 11529d9a58e3SEric Taylor cbp->cb_handles[cbp->cb_used++] = zhp; 11539d9a58e3SEric Taylor } 11543bb79becSeschrock 1155591e0e13SSebastien Roy /* 1156591e0e13SSebastien Roy * Recursive helper function used during file system enumeration 1157591e0e13SSebastien Roy */ 11583bb79becSeschrock static int 1159591e0e13SSebastien Roy zfs_iter_cb(zfs_handle_t *zhp, void *data) 11603bb79becSeschrock { 11619d9a58e3SEric Taylor get_all_cb_t *cbp = data; 11623bb79becSeschrock 11639d9a58e3SEric Taylor if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) { 11643bb79becSeschrock zfs_close(zhp); 11653bb79becSeschrock return (0); 11663bb79becSeschrock } 11673bb79becSeschrock 1168a227b7f4Shs if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { 1169a227b7f4Shs zfs_close(zhp); 1170a227b7f4Shs return (0); 1171a227b7f4Shs } 1172a227b7f4Shs 1173eb633035STom Caputi if (zfs_prop_get_int(zhp, ZFS_PROP_KEYSTATUS) == 1174eb633035STom Caputi ZFS_KEYSTATUS_UNAVAILABLE) { 1175eb633035STom Caputi zfs_close(zhp); 1176eb633035STom Caputi return (0); 1177eb633035STom Caputi } 1178eb633035STom Caputi 11799c3fd121SMatthew Ahrens /* 11809c3fd121SMatthew Ahrens * If this filesystem is inconsistent and has a receive resume 11819c3fd121SMatthew Ahrens * token, we can not mount it. 11829c3fd121SMatthew Ahrens */ 11839c3fd121SMatthew Ahrens if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) && 11849c3fd121SMatthew Ahrens zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN, 11859c3fd121SMatthew Ahrens NULL, 0, NULL, NULL, 0, B_TRUE) == 0) { 11869c3fd121SMatthew Ahrens zfs_close(zhp); 11879c3fd121SMatthew Ahrens return (0); 11889c3fd121SMatthew Ahrens } 11899c3fd121SMatthew Ahrens 11909d9a58e3SEric Taylor libzfs_add_handle(cbp, zhp); 1191591e0e13SSebastien Roy if (zfs_iter_filesystems(zhp, zfs_iter_cb, cbp) != 0) { 11929d9a58e3SEric Taylor zfs_close(zhp); 11939d9a58e3SEric Taylor return (-1); 11943bb79becSeschrock } 11959d9a58e3SEric Taylor return (0); 11963bb79becSeschrock } 11973bb79becSeschrock 1198591e0e13SSebastien Roy /* 1199591e0e13SSebastien Roy * Sort comparator that compares two mountpoint paths. We sort these paths so 1200591e0e13SSebastien Roy * that subdirectories immediately follow their parents. This means that we 1201bc4c0ff1SAndy Fiddaman * effectively treat the '/' character as the lowest value non-nul char. 1202bc4c0ff1SAndy Fiddaman * Since filesystems from non-global zones can have the same mountpoint 1203bc4c0ff1SAndy Fiddaman * as other filesystems, the comparator sorts global zone filesystems to 1204bc4c0ff1SAndy Fiddaman * the top of the list. This means that the global zone will traverse the 1205bc4c0ff1SAndy Fiddaman * filesystem list in the correct order and can stop when it sees the 1206bc4c0ff1SAndy Fiddaman * first zoned filesystem. In a non-global zone, only the delegated 1207bc4c0ff1SAndy Fiddaman * filesystems are seen. 1208bc4c0ff1SAndy Fiddaman * 1209bc4c0ff1SAndy Fiddaman * An example sorted list using this comparator would look like: 1210591e0e13SSebastien Roy * 1211591e0e13SSebastien Roy * /foo 1212591e0e13SSebastien Roy * /foo/bar 1213591e0e13SSebastien Roy * /foo/bar/baz 1214591e0e13SSebastien Roy * /foo/baz 1215591e0e13SSebastien Roy * /foo.bar 1216bc4c0ff1SAndy Fiddaman * /foo (NGZ1) 1217bc4c0ff1SAndy Fiddaman * /foo (NGZ2) 1218591e0e13SSebastien Roy * 1219591e0e13SSebastien Roy * The mounting code depends on this ordering to deterministically iterate 1220591e0e13SSebastien Roy * over filesystems in order to spawn parallel mount tasks. 1221591e0e13SSebastien Roy */ 1222bc4c0ff1SAndy Fiddaman static int 1223591e0e13SSebastien Roy mountpoint_cmp(const void *arga, const void *argb) 12243bb79becSeschrock { 1225591e0e13SSebastien Roy zfs_handle_t *const *zap = arga; 1226591e0e13SSebastien Roy zfs_handle_t *za = *zap; 1227591e0e13SSebastien Roy zfs_handle_t *const *zbp = argb; 1228591e0e13SSebastien Roy zfs_handle_t *zb = *zbp; 12293bb79becSeschrock char mounta[MAXPATHLEN]; 12303bb79becSeschrock char mountb[MAXPATHLEN]; 1231591e0e13SSebastien Roy const char *a = mounta; 1232591e0e13SSebastien Roy const char *b = mountb; 1233f3861e1aSahl boolean_t gota, gotb; 1234bc4c0ff1SAndy Fiddaman uint64_t zoneda, zonedb; 1235bc4c0ff1SAndy Fiddaman 1236bc4c0ff1SAndy Fiddaman zoneda = zfs_prop_get_int(za, ZFS_PROP_ZONED); 1237bc4c0ff1SAndy Fiddaman zonedb = zfs_prop_get_int(zb, ZFS_PROP_ZONED); 1238bc4c0ff1SAndy Fiddaman if (zoneda && !zonedb) 1239bc4c0ff1SAndy Fiddaman return (1); 1240bc4c0ff1SAndy Fiddaman if (!zoneda && zonedb) 1241bc4c0ff1SAndy Fiddaman return (-1); 1242f3861e1aSahl 1243591e0e13SSebastien Roy gota = (zfs_get_type(za) == ZFS_TYPE_FILESYSTEM); 1244591e0e13SSebastien Roy if (gota) { 1245591e0e13SSebastien Roy verify(zfs_prop_get(za, ZFS_PROP_MOUNTPOINT, mounta, 1246f3861e1aSahl sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 1247591e0e13SSebastien Roy } 1248591e0e13SSebastien Roy gotb = (zfs_get_type(zb) == ZFS_TYPE_FILESYSTEM); 1249591e0e13SSebastien Roy if (gotb) { 1250591e0e13SSebastien Roy verify(zfs_prop_get(zb, ZFS_PROP_MOUNTPOINT, mountb, 1251f3861e1aSahl sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 1252591e0e13SSebastien Roy } 1253f3861e1aSahl 1254591e0e13SSebastien Roy if (gota && gotb) { 1255591e0e13SSebastien Roy while (*a != '\0' && (*a == *b)) { 1256591e0e13SSebastien Roy a++; 1257591e0e13SSebastien Roy b++; 1258591e0e13SSebastien Roy } 1259591e0e13SSebastien Roy if (*a == *b) 1260591e0e13SSebastien Roy return (0); 1261591e0e13SSebastien Roy if (*a == '\0') 1262591e0e13SSebastien Roy return (-1); 1263591e0e13SSebastien Roy if (*b == '\0') 1264591e0e13SSebastien Roy return (1); 1265591e0e13SSebastien Roy if (*a == '/') 1266591e0e13SSebastien Roy return (-1); 1267591e0e13SSebastien Roy if (*b == '/') 1268591e0e13SSebastien Roy return (1); 1269591e0e13SSebastien Roy return (*a < *b ? -1 : *a > *b); 1270591e0e13SSebastien Roy } 12713bb79becSeschrock 1272f3861e1aSahl if (gota) 1273f3861e1aSahl return (-1); 1274f3861e1aSahl if (gotb) 1275f3861e1aSahl return (1); 12763bb79becSeschrock 1277591e0e13SSebastien Roy /* 1278591e0e13SSebastien Roy * If neither filesystem has a mountpoint, revert to sorting by 1279591e0e13SSebastien Roy * dataset name. 1280591e0e13SSebastien Roy */ 1281591e0e13SSebastien Roy return (strcmp(zfs_get_name(za), zfs_get_name(zb))); 1282591e0e13SSebastien Roy } 1283591e0e13SSebastien Roy 1284591e0e13SSebastien Roy /* 1285591e0e13SSebastien Roy * Return true if path2 is a child of path1. 1286591e0e13SSebastien Roy */ 1287591e0e13SSebastien Roy static boolean_t 1288591e0e13SSebastien Roy libzfs_path_contains(const char *path1, const char *path2) 1289591e0e13SSebastien Roy { 1290591e0e13SSebastien Roy return (strstr(path2, path1) == path2 && path2[strlen(path1)] == '/'); 1291591e0e13SSebastien Roy } 1292591e0e13SSebastien Roy 1293591e0e13SSebastien Roy /* 1294591e0e13SSebastien Roy * Given a mountpoint specified by idx in the handles array, find the first 1295591e0e13SSebastien Roy * non-descendent of that mountpoint and return its index. Descendant paths 1296591e0e13SSebastien Roy * start with the parent's path. This function relies on the ordering 1297591e0e13SSebastien Roy * enforced by mountpoint_cmp(). 1298591e0e13SSebastien Roy */ 1299591e0e13SSebastien Roy static int 1300591e0e13SSebastien Roy non_descendant_idx(zfs_handle_t **handles, size_t num_handles, int idx) 1301591e0e13SSebastien Roy { 1302591e0e13SSebastien Roy char parent[ZFS_MAXPROPLEN]; 1303591e0e13SSebastien Roy char child[ZFS_MAXPROPLEN]; 1304591e0e13SSebastien Roy int i; 1305591e0e13SSebastien Roy 1306591e0e13SSebastien Roy verify(zfs_prop_get(handles[idx], ZFS_PROP_MOUNTPOINT, parent, 1307591e0e13SSebastien Roy sizeof (parent), NULL, NULL, 0, B_FALSE) == 0); 1308591e0e13SSebastien Roy 1309591e0e13SSebastien Roy for (i = idx + 1; i < num_handles; i++) { 1310591e0e13SSebastien Roy verify(zfs_prop_get(handles[i], ZFS_PROP_MOUNTPOINT, child, 1311591e0e13SSebastien Roy sizeof (child), NULL, NULL, 0, B_FALSE) == 0); 1312591e0e13SSebastien Roy if (!libzfs_path_contains(parent, child)) 1313591e0e13SSebastien Roy break; 1314591e0e13SSebastien Roy } 1315591e0e13SSebastien Roy return (i); 1316591e0e13SSebastien Roy } 1317591e0e13SSebastien Roy 1318591e0e13SSebastien Roy typedef struct mnt_param { 1319591e0e13SSebastien Roy libzfs_handle_t *mnt_hdl; 1320591e0e13SSebastien Roy zfs_taskq_t *mnt_tq; 1321591e0e13SSebastien Roy zfs_handle_t **mnt_zhps; /* filesystems to mount */ 1322591e0e13SSebastien Roy size_t mnt_num_handles; 1323591e0e13SSebastien Roy int mnt_idx; /* Index of selected entry to mount */ 1324591e0e13SSebastien Roy zfs_iter_f mnt_func; 1325591e0e13SSebastien Roy void *mnt_data; 1326591e0e13SSebastien Roy } mnt_param_t; 1327591e0e13SSebastien Roy 1328591e0e13SSebastien Roy /* 1329591e0e13SSebastien Roy * Allocate and populate the parameter struct for mount function, and 1330591e0e13SSebastien Roy * schedule mounting of the entry selected by idx. 1331591e0e13SSebastien Roy */ 1332591e0e13SSebastien Roy static void 1333591e0e13SSebastien Roy zfs_dispatch_mount(libzfs_handle_t *hdl, zfs_handle_t **handles, 1334591e0e13SSebastien Roy size_t num_handles, int idx, zfs_iter_f func, void *data, zfs_taskq_t *tq) 1335591e0e13SSebastien Roy { 1336591e0e13SSebastien Roy mnt_param_t *mnt_param = zfs_alloc(hdl, sizeof (mnt_param_t)); 1337591e0e13SSebastien Roy 1338591e0e13SSebastien Roy mnt_param->mnt_hdl = hdl; 1339591e0e13SSebastien Roy mnt_param->mnt_tq = tq; 1340591e0e13SSebastien Roy mnt_param->mnt_zhps = handles; 1341591e0e13SSebastien Roy mnt_param->mnt_num_handles = num_handles; 1342591e0e13SSebastien Roy mnt_param->mnt_idx = idx; 1343591e0e13SSebastien Roy mnt_param->mnt_func = func; 1344591e0e13SSebastien Roy mnt_param->mnt_data = data; 1345591e0e13SSebastien Roy 1346591e0e13SSebastien Roy (void) zfs_taskq_dispatch(tq, zfs_mount_task, (void*)mnt_param, 1347591e0e13SSebastien Roy ZFS_TQ_SLEEP); 1348591e0e13SSebastien Roy } 1349591e0e13SSebastien Roy 1350591e0e13SSebastien Roy /* 1351591e0e13SSebastien Roy * This is the structure used to keep state of mounting or sharing operations 1352591e0e13SSebastien Roy * during a call to zpool_enable_datasets(). 1353591e0e13SSebastien Roy */ 1354591e0e13SSebastien Roy typedef struct mount_state { 1355591e0e13SSebastien Roy /* 1356591e0e13SSebastien Roy * ms_mntstatus is set to -1 if any mount fails. While multiple threads 1357591e0e13SSebastien Roy * could update this variable concurrently, no synchronization is 1358591e0e13SSebastien Roy * needed as it's only ever set to -1. 1359591e0e13SSebastien Roy */ 1360591e0e13SSebastien Roy int ms_mntstatus; 1361591e0e13SSebastien Roy int ms_mntflags; 1362591e0e13SSebastien Roy const char *ms_mntopts; 1363591e0e13SSebastien Roy } mount_state_t; 1364591e0e13SSebastien Roy 1365591e0e13SSebastien Roy static int 1366591e0e13SSebastien Roy zfs_mount_one(zfs_handle_t *zhp, void *arg) 1367591e0e13SSebastien Roy { 1368591e0e13SSebastien Roy mount_state_t *ms = arg; 1369591e0e13SSebastien Roy int ret = 0; 1370591e0e13SSebastien Roy 1371eb633035STom Caputi if (zfs_prop_get_int(zhp, ZFS_PROP_KEYSTATUS) == 1372eb633035STom Caputi ZFS_KEYSTATUS_UNAVAILABLE) 1373eb633035STom Caputi return (0); 1374eb633035STom Caputi 1375591e0e13SSebastien Roy if (zfs_mount(zhp, ms->ms_mntopts, ms->ms_mntflags) != 0) 1376591e0e13SSebastien Roy ret = ms->ms_mntstatus = -1; 1377591e0e13SSebastien Roy return (ret); 1378591e0e13SSebastien Roy } 1379591e0e13SSebastien Roy 1380591e0e13SSebastien Roy static int 1381591e0e13SSebastien Roy zfs_share_one(zfs_handle_t *zhp, void *arg) 1382591e0e13SSebastien Roy { 1383591e0e13SSebastien Roy mount_state_t *ms = arg; 1384591e0e13SSebastien Roy int ret = 0; 1385591e0e13SSebastien Roy 1386591e0e13SSebastien Roy if (zfs_share(zhp) != 0) 1387591e0e13SSebastien Roy ret = ms->ms_mntstatus = -1; 1388591e0e13SSebastien Roy return (ret); 1389591e0e13SSebastien Roy } 1390591e0e13SSebastien Roy 1391591e0e13SSebastien Roy /* 1392591e0e13SSebastien Roy * Task queue function to mount one file system. On completion, it finds and 1393591e0e13SSebastien Roy * schedules its children to be mounted. This depends on the sorting done in 1394591e0e13SSebastien Roy * zfs_foreach_mountpoint(). Note that the degenerate case (chain of entries 1395591e0e13SSebastien Roy * each descending from the previous) will have no parallelism since we always 1396591e0e13SSebastien Roy * have to wait for the parent to finish mounting before we can schedule 1397591e0e13SSebastien Roy * its children. 1398591e0e13SSebastien Roy */ 1399591e0e13SSebastien Roy static void 1400591e0e13SSebastien Roy zfs_mount_task(void *arg) 1401591e0e13SSebastien Roy { 1402591e0e13SSebastien Roy mnt_param_t *mp = arg; 1403591e0e13SSebastien Roy int idx = mp->mnt_idx; 1404591e0e13SSebastien Roy zfs_handle_t **handles = mp->mnt_zhps; 1405591e0e13SSebastien Roy size_t num_handles = mp->mnt_num_handles; 1406591e0e13SSebastien Roy char mountpoint[ZFS_MAXPROPLEN]; 1407591e0e13SSebastien Roy 1408591e0e13SSebastien Roy verify(zfs_prop_get(handles[idx], ZFS_PROP_MOUNTPOINT, mountpoint, 1409591e0e13SSebastien Roy sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0); 1410591e0e13SSebastien Roy 1411591e0e13SSebastien Roy if (mp->mnt_func(handles[idx], mp->mnt_data) != 0) 1412591e0e13SSebastien Roy return; 1413591e0e13SSebastien Roy 1414591e0e13SSebastien Roy /* 1415591e0e13SSebastien Roy * We dispatch tasks to mount filesystems with mountpoints underneath 1416591e0e13SSebastien Roy * this one. We do this by dispatching the next filesystem with a 1417591e0e13SSebastien Roy * descendant mountpoint of the one we just mounted, then skip all of 1418591e0e13SSebastien Roy * its descendants, dispatch the next descendant mountpoint, and so on. 1419591e0e13SSebastien Roy * The non_descendant_idx() function skips over filesystems that are 1420591e0e13SSebastien Roy * descendants of the filesystem we just dispatched. 1421591e0e13SSebastien Roy */ 1422591e0e13SSebastien Roy for (int i = idx + 1; i < num_handles; 1423591e0e13SSebastien Roy i = non_descendant_idx(handles, num_handles, i)) { 1424591e0e13SSebastien Roy char child[ZFS_MAXPROPLEN]; 1425591e0e13SSebastien Roy verify(zfs_prop_get(handles[i], ZFS_PROP_MOUNTPOINT, 1426591e0e13SSebastien Roy child, sizeof (child), NULL, NULL, 0, B_FALSE) == 0); 1427591e0e13SSebastien Roy 1428591e0e13SSebastien Roy if (!libzfs_path_contains(mountpoint, child)) 1429591e0e13SSebastien Roy break; /* not a descendant, return */ 1430591e0e13SSebastien Roy zfs_dispatch_mount(mp->mnt_hdl, handles, num_handles, i, 1431591e0e13SSebastien Roy mp->mnt_func, mp->mnt_data, mp->mnt_tq); 1432591e0e13SSebastien Roy } 1433591e0e13SSebastien Roy free(mp); 1434591e0e13SSebastien Roy } 1435591e0e13SSebastien Roy 1436591e0e13SSebastien Roy /* 1437591e0e13SSebastien Roy * Issue the func callback for each ZFS handle contained in the handles 1438591e0e13SSebastien Roy * array. This function is used to mount all datasets, and so this function 1439591e0e13SSebastien Roy * guarantees that filesystems for parent mountpoints are called before their 1440591e0e13SSebastien Roy * children. As such, before issuing any callbacks, we first sort the array 1441591e0e13SSebastien Roy * of handles by mountpoint. 1442591e0e13SSebastien Roy * 1443591e0e13SSebastien Roy * Callbacks are issued in one of two ways: 1444591e0e13SSebastien Roy * 1445591e0e13SSebastien Roy * 1. Sequentially: If the parallel argument is B_FALSE or the ZFS_SERIAL_MOUNT 1446591e0e13SSebastien Roy * environment variable is set, then we issue callbacks sequentially. 1447591e0e13SSebastien Roy * 1448591e0e13SSebastien Roy * 2. In parallel: If the parallel argument is B_TRUE and the ZFS_SERIAL_MOUNT 1449591e0e13SSebastien Roy * environment variable is not set, then we use a taskq to dispatch threads 1450591e0e13SSebastien Roy * to mount filesystems is parallel. This function dispatches tasks to mount 1451591e0e13SSebastien Roy * the filesystems at the top-level mountpoints, and these tasks in turn 1452591e0e13SSebastien Roy * are responsible for recursively mounting filesystems in their children 1453591e0e13SSebastien Roy * mountpoints. 1454591e0e13SSebastien Roy */ 1455591e0e13SSebastien Roy void 1456591e0e13SSebastien Roy zfs_foreach_mountpoint(libzfs_handle_t *hdl, zfs_handle_t **handles, 1457591e0e13SSebastien Roy size_t num_handles, zfs_iter_f func, void *data, boolean_t parallel) 1458591e0e13SSebastien Roy { 1459bc4c0ff1SAndy Fiddaman zoneid_t zoneid = getzoneid(); 1460bc4c0ff1SAndy Fiddaman 1461591e0e13SSebastien Roy /* 1462591e0e13SSebastien Roy * The ZFS_SERIAL_MOUNT environment variable is an undocumented 1463591e0e13SSebastien Roy * variable that can be used as a convenience to do a/b comparison 1464591e0e13SSebastien Roy * of serial vs. parallel mounting. 1465591e0e13SSebastien Roy */ 1466591e0e13SSebastien Roy boolean_t serial_mount = !parallel || 1467591e0e13SSebastien Roy (getenv("ZFS_SERIAL_MOUNT") != NULL); 1468591e0e13SSebastien Roy 1469591e0e13SSebastien Roy /* 1470591e0e13SSebastien Roy * Sort the datasets by mountpoint. See mountpoint_cmp for details 1471591e0e13SSebastien Roy * of how these are sorted. 1472591e0e13SSebastien Roy */ 1473591e0e13SSebastien Roy qsort(handles, num_handles, sizeof (zfs_handle_t *), mountpoint_cmp); 1474591e0e13SSebastien Roy 1475591e0e13SSebastien Roy if (serial_mount) { 1476591e0e13SSebastien Roy for (int i = 0; i < num_handles; i++) { 1477591e0e13SSebastien Roy func(handles[i], data); 1478591e0e13SSebastien Roy } 1479591e0e13SSebastien Roy return; 1480591e0e13SSebastien Roy } 1481591e0e13SSebastien Roy 1482591e0e13SSebastien Roy /* 1483591e0e13SSebastien Roy * Issue the callback function for each dataset using a parallel 1484591e0e13SSebastien Roy * algorithm that uses a taskq to manage threads. 1485591e0e13SSebastien Roy */ 1486591e0e13SSebastien Roy zfs_taskq_t *tq = zfs_taskq_create("mount_taskq", mount_tq_nthr, 0, 1487591e0e13SSebastien Roy mount_tq_nthr, mount_tq_nthr, ZFS_TASKQ_PREPOPULATE); 1488591e0e13SSebastien Roy 1489591e0e13SSebastien Roy /* 1490591e0e13SSebastien Roy * There may be multiple "top level" mountpoints outside of the pool's 1491591e0e13SSebastien Roy * root mountpoint, e.g.: /foo /bar. Dispatch a mount task for each of 1492591e0e13SSebastien Roy * these. 1493591e0e13SSebastien Roy */ 1494591e0e13SSebastien Roy for (int i = 0; i < num_handles; 1495591e0e13SSebastien Roy i = non_descendant_idx(handles, num_handles, i)) { 1496bc4c0ff1SAndy Fiddaman /* 1497bc4c0ff1SAndy Fiddaman * Since the mountpoints have been sorted so that the zoned 1498bc4c0ff1SAndy Fiddaman * filesystems are at the end, a zoned filesystem seen from 1499bc4c0ff1SAndy Fiddaman * the global zone means that we're done. 1500bc4c0ff1SAndy Fiddaman */ 1501bc4c0ff1SAndy Fiddaman if (zoneid == GLOBAL_ZONEID && 1502bc4c0ff1SAndy Fiddaman zfs_prop_get_int(handles[i], ZFS_PROP_ZONED)) 1503bc4c0ff1SAndy Fiddaman break; 1504591e0e13SSebastien Roy zfs_dispatch_mount(hdl, handles, num_handles, i, func, data, 1505591e0e13SSebastien Roy tq); 1506591e0e13SSebastien Roy } 1507591e0e13SSebastien Roy 1508591e0e13SSebastien Roy zfs_taskq_wait(tq); /* wait for all scheduled mounts to complete */ 1509591e0e13SSebastien Roy zfs_taskq_destroy(tq); 15103bb79becSeschrock } 15113bb79becSeschrock 1512f3861e1aSahl /* 1513f3861e1aSahl * Mount and share all datasets within the given pool. This assumes that no 1514591e0e13SSebastien Roy * datasets within the pool are currently mounted. 1515f3861e1aSahl */ 1516f3861e1aSahl #pragma weak zpool_mount_datasets = zpool_enable_datasets 15173bb79becSeschrock int 1518f3861e1aSahl zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) 15193bb79becSeschrock { 15209d9a58e3SEric Taylor get_all_cb_t cb = { 0 }; 1521591e0e13SSebastien Roy mount_state_t ms = { 0 }; 15223bb79becSeschrock zfs_handle_t *zfsp; 1523591e0e13SSebastien Roy sa_init_selective_arg_t sharearg; 1524591e0e13SSebastien Roy int ret = 0; 15253bb79becSeschrock 1526591e0e13SSebastien Roy if ((zfsp = zfs_open(zhp->zpool_hdl, zhp->zpool_name, 1527591e0e13SSebastien Roy ZFS_TYPE_DATASET)) == NULL) 15283bb79becSeschrock goto out; 15293bb79becSeschrock 15303bb79becSeschrock 15313bb79becSeschrock /* 1532591e0e13SSebastien Roy * Gather all non-snapshot datasets within the pool. Start by adding 1533591e0e13SSebastien Roy * the root filesystem for this pool to the list, and then iterate 1534591e0e13SSebastien Roy * over all child filesystems. 15353bb79becSeschrock */ 1536591e0e13SSebastien Roy libzfs_add_handle(&cb, zfsp); 1537591e0e13SSebastien Roy if (zfs_iter_filesystems(zfsp, zfs_iter_cb, &cb) != 0) 15386e77af0aSDavid Pacheco goto out; 15396e77af0aSDavid Pacheco 1540591e0e13SSebastien Roy ms.ms_mntopts = mntopts; 1541591e0e13SSebastien Roy ms.ms_mntflags = flags; 1542591e0e13SSebastien Roy zfs_foreach_mountpoint(zhp->zpool_hdl, cb.cb_handles, cb.cb_used, 1543591e0e13SSebastien Roy zfs_mount_one, &ms, B_TRUE); 1544591e0e13SSebastien Roy if (ms.ms_mntstatus != 0) 1545591e0e13SSebastien Roy ret = ms.ms_mntstatus; 15465b6e0c46Sdougm 154767331909Sdougm /* 1548b8dc1b43SJoyce McIntosh * Initialize libshare SA_INIT_SHARE_API_SELECTIVE here 1549b8dc1b43SJoyce McIntosh * to avoid unnecessary load/unload of the libshare API 1550b8dc1b43SJoyce McIntosh * per shared dataset downstream. 155167331909Sdougm */ 1552591e0e13SSebastien Roy sharearg.zhandle_arr = cb.cb_handles; 1553591e0e13SSebastien Roy sharearg.zhandle_len = cb.cb_used; 1554591e0e13SSebastien Roy if ((ret = zfs_init_libshare_arg(zhp->zpool_hdl, 1555591e0e13SSebastien Roy SA_INIT_SHARE_API_SELECTIVE, &sharearg)) != 0) 1556591e0e13SSebastien Roy goto out; 155767331909Sdougm 1558591e0e13SSebastien Roy ms.ms_mntstatus = 0; 1559591e0e13SSebastien Roy zfs_foreach_mountpoint(zhp->zpool_hdl, cb.cb_handles, cb.cb_used, 1560591e0e13SSebastien Roy zfs_share_one, &ms, B_FALSE); 1561591e0e13SSebastien Roy if (ms.ms_mntstatus != 0) 1562591e0e13SSebastien Roy ret = ms.ms_mntstatus; 15633bb79becSeschrock 15643bb79becSeschrock out: 1565591e0e13SSebastien Roy for (int i = 0; i < cb.cb_used; i++) 15669d9a58e3SEric Taylor zfs_close(cb.cb_handles[i]); 15679d9a58e3SEric Taylor free(cb.cb_handles); 15683bb79becSeschrock 15693bb79becSeschrock return (ret); 15703bb79becSeschrock } 15713bb79becSeschrock 15723bb79becSeschrock static int 15733bb79becSeschrock mountpoint_compare(const void *a, const void *b) 15743bb79becSeschrock { 15753bb79becSeschrock const char *mounta = *((char **)a); 15763bb79becSeschrock const char *mountb = *((char **)b); 15773bb79becSeschrock 15783bb79becSeschrock return (strcmp(mountb, mounta)); 15793bb79becSeschrock } 15803bb79becSeschrock 1581681d9761SEric Taylor /* alias for 2002/240 */ 1582681d9761SEric Taylor #pragma weak zpool_unmount_datasets = zpool_disable_datasets 1583f3861e1aSahl /* 1584f3861e1aSahl * Unshare and unmount all datasets within the given pool. We don't want to 1585f3861e1aSahl * rely on traversing the DSL to discover the filesystems within the pool, 1586f3861e1aSahl * because this may be expensive (if not all of them are mounted), and can fail 1587f3861e1aSahl * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and 1588f3861e1aSahl * gather all the filesystems that are currently mounted. 1589f3861e1aSahl */ 15903bb79becSeschrock int 1591f3861e1aSahl zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) 15923bb79becSeschrock { 15933bb79becSeschrock int used, alloc; 15943bb79becSeschrock struct mnttab entry; 15953bb79becSeschrock size_t namelen; 15963bb79becSeschrock char **mountpoints = NULL; 15973bb79becSeschrock zfs_handle_t **datasets = NULL; 15983bb79becSeschrock libzfs_handle_t *hdl = zhp->zpool_hdl; 15993bb79becSeschrock int i; 16003bb79becSeschrock int ret = -1; 16013bb79becSeschrock int flags = (force ? MS_FORCE : 0); 16028a981c33SDaniel Hoffman sa_init_selective_arg_t sharearg; 16033bb79becSeschrock 16043bb79becSeschrock namelen = strlen(zhp->zpool_name); 16053bb79becSeschrock 16063bb79becSeschrock rewind(hdl->libzfs_mnttab); 16073bb79becSeschrock used = alloc = 0; 16083bb79becSeschrock while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 16093bb79becSeschrock /* 16103bb79becSeschrock * Ignore non-ZFS entries. 16113bb79becSeschrock */ 16123bb79becSeschrock if (entry.mnt_fstype == NULL || 16133bb79becSeschrock strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 16143bb79becSeschrock continue; 16153bb79becSeschrock 16163bb79becSeschrock /* 16173bb79becSeschrock * Ignore filesystems not within this pool. 16183bb79becSeschrock */ 16193bb79becSeschrock if (entry.mnt_mountp == NULL || 16203bb79becSeschrock strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || 16213bb79becSeschrock (entry.mnt_special[namelen] != '/' && 16223bb79becSeschrock entry.mnt_special[namelen] != '\0')) 16233bb79becSeschrock continue; 16243bb79becSeschrock 16253bb79becSeschrock /* 16263bb79becSeschrock * At this point we've found a filesystem within our pool. Add 16273bb79becSeschrock * it to our growing list. 16283bb79becSeschrock */ 16293bb79becSeschrock if (used == alloc) { 16303bb79becSeschrock if (alloc == 0) { 16313bb79becSeschrock if ((mountpoints = zfs_alloc(hdl, 16323bb79becSeschrock 8 * sizeof (void *))) == NULL) 16333bb79becSeschrock goto out; 16343bb79becSeschrock 16353bb79becSeschrock if ((datasets = zfs_alloc(hdl, 16363bb79becSeschrock 8 * sizeof (void *))) == NULL) 16373bb79becSeschrock goto out; 16383bb79becSeschrock 16393bb79becSeschrock alloc = 8; 16403bb79becSeschrock } else { 1641e9dbad6fSeschrock void *ptr; 16423bb79becSeschrock 1643e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, mountpoints, 1644e9dbad6fSeschrock alloc * sizeof (void *), 16453bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 16463bb79becSeschrock goto out; 1647e9dbad6fSeschrock mountpoints = ptr; 16483bb79becSeschrock 1649e9dbad6fSeschrock if ((ptr = zfs_realloc(hdl, datasets, 1650e9dbad6fSeschrock alloc * sizeof (void *), 16513bb79becSeschrock alloc * 2 * sizeof (void *))) == NULL) 16523bb79becSeschrock goto out; 1653e9dbad6fSeschrock datasets = ptr; 16543bb79becSeschrock 16553bb79becSeschrock alloc *= 2; 16563bb79becSeschrock } 16573bb79becSeschrock } 16583bb79becSeschrock 16593bb79becSeschrock if ((mountpoints[used] = zfs_strdup(hdl, 16603bb79becSeschrock entry.mnt_mountp)) == NULL) 16613bb79becSeschrock goto out; 16623bb79becSeschrock 16633bb79becSeschrock /* 16643bb79becSeschrock * This is allowed to fail, in case there is some I/O error. It 16653bb79becSeschrock * is only used to determine if we need to remove the underlying 16663bb79becSeschrock * mountpoint, so failure is not fatal. 16673bb79becSeschrock */ 16683bb79becSeschrock datasets[used] = make_dataset_handle(hdl, entry.mnt_special); 16693bb79becSeschrock 16703bb79becSeschrock used++; 16713bb79becSeschrock } 16723bb79becSeschrock 16733bb79becSeschrock /* 16743bb79becSeschrock * At this point, we have the entire list of filesystems, so sort it by 16753bb79becSeschrock * mountpoint. 16763bb79becSeschrock */ 16778a981c33SDaniel Hoffman sharearg.zhandle_arr = datasets; 16788a981c33SDaniel Hoffman sharearg.zhandle_len = used; 16798a981c33SDaniel Hoffman ret = zfs_init_libshare_arg(hdl, SA_INIT_SHARE_API_SELECTIVE, 16808a981c33SDaniel Hoffman &sharearg); 16818a981c33SDaniel Hoffman if (ret != 0) 16828a981c33SDaniel Hoffman goto out; 16833bb79becSeschrock qsort(mountpoints, used, sizeof (char *), mountpoint_compare); 16843bb79becSeschrock 16853bb79becSeschrock /* 16863bb79becSeschrock * Walk through and first unshare everything. 16873bb79becSeschrock */ 16883bb79becSeschrock for (i = 0; i < used; i++) { 1689da6c28aaSamw zfs_share_proto_t *curr_proto; 1690da6c28aaSamw for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 1691da6c28aaSamw curr_proto++) { 1692da6c28aaSamw if (is_shared(hdl, mountpoints[i], *curr_proto) && 1693da6c28aaSamw unshare_one(hdl, mountpoints[i], 1694da6c28aaSamw mountpoints[i], *curr_proto) != 0) 1695da6c28aaSamw goto out; 1696da6c28aaSamw } 16973bb79becSeschrock } 16983bb79becSeschrock 16993bb79becSeschrock /* 17003bb79becSeschrock * Now unmount everything, removing the underlying directories as 17013bb79becSeschrock * appropriate. 17023bb79becSeschrock */ 17033bb79becSeschrock for (i = 0; i < used; i++) { 17043bb79becSeschrock if (unmount_one(hdl, mountpoints[i], flags) != 0) 17053bb79becSeschrock goto out; 1706e9dbad6fSeschrock } 17073bb79becSeschrock 1708e9dbad6fSeschrock for (i = 0; i < used; i++) { 17093bb79becSeschrock if (datasets[i]) 17103bb79becSeschrock remove_mountpoint(datasets[i]); 17113bb79becSeschrock } 17123bb79becSeschrock 17133bb79becSeschrock ret = 0; 17143bb79becSeschrock out: 17153bb79becSeschrock for (i = 0; i < used; i++) { 17163bb79becSeschrock if (datasets[i]) 17173bb79becSeschrock zfs_close(datasets[i]); 17183bb79becSeschrock free(mountpoints[i]); 17193bb79becSeschrock } 17203bb79becSeschrock free(datasets); 17213bb79becSeschrock free(mountpoints); 17223bb79becSeschrock 17233bb79becSeschrock return (ret); 17243bb79becSeschrock } 1725