1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd 22168404Spjd/* 23219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24168404Spjd */ 25168404Spjd 26168404Spjd/* 27168404Spjd * Routines to manage ZFS mounts. We separate all the nasty routines that have 28168404Spjd * to deal with the OS. The following functions are the main entry points -- 29168404Spjd * they are used by mount and unmount and when changing a filesystem's 30168404Spjd * mountpoint. 31168404Spjd * 32168404Spjd * zfs_is_mounted() 33168404Spjd * zfs_mount() 34168404Spjd * zfs_unmount() 35168404Spjd * zfs_unmountall() 36168404Spjd * 37168404Spjd * This file also contains the functions used to manage sharing filesystems via 38168404Spjd * NFS and iSCSI: 39168404Spjd * 40168404Spjd * zfs_is_shared() 41168404Spjd * zfs_share() 42168404Spjd * zfs_unshare() 43168404Spjd * 44168404Spjd * zfs_is_shared_nfs() 45185029Spjd * zfs_is_shared_smb() 46185029Spjd * zfs_share_proto() 47185029Spjd * zfs_shareall(); 48168404Spjd * zfs_unshare_nfs() 49185029Spjd * zfs_unshare_smb() 50168404Spjd * zfs_unshareall_nfs() 51185029Spjd * zfs_unshareall_smb() 52185029Spjd * zfs_unshareall() 53185029Spjd * zfs_unshareall_bypath() 54168404Spjd * 55168404Spjd * The following functions are available for pool consumers, and will 56168404Spjd * mount/unmount and share/unshare all datasets within pool: 57168404Spjd * 58168404Spjd * zpool_enable_datasets() 59168404Spjd * zpool_disable_datasets() 60168404Spjd */ 61168404Spjd 62168404Spjd#include <dirent.h> 63168404Spjd#include <dlfcn.h> 64168404Spjd#include <errno.h> 65168404Spjd#include <libgen.h> 66168404Spjd#include <libintl.h> 67168404Spjd#include <stdio.h> 68168404Spjd#include <stdlib.h> 69168404Spjd#include <strings.h> 70168404Spjd#include <unistd.h> 71168404Spjd#include <zone.h> 72168404Spjd#include <sys/mntent.h> 73168404Spjd#include <sys/mount.h> 74168404Spjd#include <sys/stat.h> 75168404Spjd 76168404Spjd#include <libzfs.h> 77168404Spjd 78168404Spjd#include "libzfs_impl.h" 79168404Spjd 80185029Spjd#include <libshare.h> 81185029Spjd#define MAXISALEN 257 /* based on sysinfo(2) man page */ 82185029Spjd 83185029Spjdstatic int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); 84185029Spjdzfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, 85185029Spjd zfs_share_proto_t); 86185029Spjd 87185029Spjd/* 88185029Spjd * The share protocols table must be in the same order as the zfs_share_prot_t 89185029Spjd * enum in libzfs_impl.h 90185029Spjd */ 91185029Spjdtypedef struct { 92185029Spjd zfs_prop_t p_prop; 93185029Spjd char *p_name; 94185029Spjd int p_share_err; 95185029Spjd int p_unshare_err; 96185029Spjd} proto_table_t; 97185029Spjd 98185029Spjdproto_table_t proto_table[PROTO_END] = { 99185029Spjd {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, 100185029Spjd {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, 101185029Spjd}; 102185029Spjd 103185029Spjdzfs_share_proto_t nfs_only[] = { 104185029Spjd PROTO_NFS, 105185029Spjd PROTO_END 106185029Spjd}; 107185029Spjd 108185029Spjdzfs_share_proto_t smb_only[] = { 109185029Spjd PROTO_SMB, 110185029Spjd PROTO_END 111185029Spjd}; 112185029Spjdzfs_share_proto_t share_all_proto[] = { 113185029Spjd PROTO_NFS, 114185029Spjd PROTO_SMB, 115185029Spjd PROTO_END 116185029Spjd}; 117185029Spjd 118168404Spjd/* 119185029Spjd * Search the sharetab for the given mountpoint and protocol, returning 120185029Spjd * a zfs_share_type_t value. 121168404Spjd */ 122185029Spjdstatic zfs_share_type_t 123185029Spjdis_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) 124168404Spjd{ 125168404Spjd char buf[MAXPATHLEN], *tab; 126185029Spjd char *ptr; 127168404Spjd 128168404Spjd if (hdl->libzfs_sharetab == NULL) 129185029Spjd return (SHARED_NOT_SHARED); 130168404Spjd 131168404Spjd (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); 132168404Spjd 133168404Spjd while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { 134168404Spjd 135168404Spjd /* the mountpoint is the first entry on each line */ 136185029Spjd if ((tab = strchr(buf, '\t')) == NULL) 137185029Spjd continue; 138185029Spjd 139185029Spjd *tab = '\0'; 140185029Spjd if (strcmp(buf, mountpoint) == 0) { 141219089Spjd#ifdef sun 142185029Spjd /* 143185029Spjd * the protocol field is the third field 144185029Spjd * skip over second field 145185029Spjd */ 146185029Spjd ptr = ++tab; 147185029Spjd if ((tab = strchr(ptr, '\t')) == NULL) 148185029Spjd continue; 149185029Spjd ptr = ++tab; 150185029Spjd if ((tab = strchr(ptr, '\t')) == NULL) 151185029Spjd continue; 152168404Spjd *tab = '\0'; 153185029Spjd if (strcmp(ptr, 154185029Spjd proto_table[proto].p_name) == 0) { 155185029Spjd switch (proto) { 156185029Spjd case PROTO_NFS: 157185029Spjd return (SHARED_NFS); 158185029Spjd case PROTO_SMB: 159185029Spjd return (SHARED_SMB); 160185029Spjd default: 161185029Spjd return (0); 162185029Spjd } 163185029Spjd } 164196950Spjd#else 165196950Spjd if (proto == PROTO_NFS) 166196950Spjd return (SHARED_NFS); 167196950Spjd#endif 168168404Spjd } 169168404Spjd } 170168404Spjd 171185029Spjd return (SHARED_NOT_SHARED); 172168404Spjd} 173168404Spjd 174219089Spjd#ifdef sun 175168404Spjd/* 176168404Spjd * Returns true if the specified directory is empty. If we can't open the 177168404Spjd * directory at all, return true so that the mount can fail with a more 178168404Spjd * informative error message. 179168404Spjd */ 180168404Spjdstatic boolean_t 181168404Spjddir_is_empty(const char *dirname) 182168404Spjd{ 183168404Spjd DIR *dirp; 184168404Spjd struct dirent64 *dp; 185168404Spjd 186168404Spjd if ((dirp = opendir(dirname)) == NULL) 187168404Spjd return (B_TRUE); 188168404Spjd 189168404Spjd while ((dp = readdir64(dirp)) != NULL) { 190168404Spjd 191168404Spjd if (strcmp(dp->d_name, ".") == 0 || 192168404Spjd strcmp(dp->d_name, "..") == 0) 193168404Spjd continue; 194168404Spjd 195168404Spjd (void) closedir(dirp); 196168404Spjd return (B_FALSE); 197168404Spjd } 198168404Spjd 199168404Spjd (void) closedir(dirp); 200168404Spjd return (B_TRUE); 201168404Spjd} 202168404Spjd#endif 203168404Spjd 204168404Spjd/* 205168404Spjd * Checks to see if the mount is active. If the filesystem is mounted, we fill 206168404Spjd * in 'where' with the current mountpoint, and return 1. Otherwise, we return 207168404Spjd * 0. 208168404Spjd */ 209168404Spjdboolean_t 210168404Spjdis_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) 211168404Spjd{ 212209962Smm struct mnttab entry; 213168404Spjd 214209962Smm if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) 215168404Spjd return (B_FALSE); 216168404Spjd 217168404Spjd if (where != NULL) 218168404Spjd *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); 219168404Spjd 220168404Spjd return (B_TRUE); 221168404Spjd} 222168404Spjd 223168404Spjdboolean_t 224168404Spjdzfs_is_mounted(zfs_handle_t *zhp, char **where) 225168404Spjd{ 226168404Spjd return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); 227168404Spjd} 228168404Spjd 229168404Spjd/* 230168404Spjd * Returns true if the given dataset is mountable, false otherwise. Returns the 231168404Spjd * mountpoint in 'buf'. 232168404Spjd */ 233168404Spjdstatic boolean_t 234168404Spjdzfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, 235185029Spjd zprop_source_t *source) 236168404Spjd{ 237168404Spjd char sourceloc[ZFS_MAXNAMELEN]; 238185029Spjd zprop_source_t sourcetype; 239168404Spjd 240168404Spjd if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) 241168404Spjd return (B_FALSE); 242168404Spjd 243168404Spjd verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, 244168404Spjd &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); 245168404Spjd 246168404Spjd if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || 247168404Spjd strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) 248168404Spjd return (B_FALSE); 249168404Spjd 250185029Spjd if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) 251168404Spjd return (B_FALSE); 252168404Spjd 253168404Spjd if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && 254168404Spjd getzoneid() == GLOBAL_ZONEID) 255168404Spjd return (B_FALSE); 256168404Spjd 257168404Spjd if (source) 258168404Spjd *source = sourcetype; 259168404Spjd 260168404Spjd return (B_TRUE); 261168404Spjd} 262168404Spjd 263168404Spjd/* 264168404Spjd * Mount the given filesystem. 265168404Spjd */ 266168404Spjdint 267168404Spjdzfs_mount(zfs_handle_t *zhp, const char *options, int flags) 268168404Spjd{ 269168404Spjd struct stat buf; 270168404Spjd char mountpoint[ZFS_MAXPROPLEN]; 271168404Spjd char mntopts[MNT_LINE_MAX]; 272168404Spjd libzfs_handle_t *hdl = zhp->zfs_hdl; 273168404Spjd 274168404Spjd if (options == NULL) 275168404Spjd mntopts[0] = '\0'; 276168404Spjd else 277168404Spjd (void) strlcpy(mntopts, options, sizeof (mntopts)); 278168404Spjd 279219089Spjd /* 280219089Spjd * If the pool is imported read-only then all mounts must be read-only 281219089Spjd */ 282219089Spjd if (zpool_get_prop_int(zhp->zpool_hdl, ZPOOL_PROP_READONLY, NULL)) 283219089Spjd flags |= MS_RDONLY; 284219089Spjd 285168404Spjd if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 286168404Spjd return (0); 287168404Spjd 288168404Spjd /* Create the directory if it doesn't already exist */ 289168404Spjd if (lstat(mountpoint, &buf) != 0) { 290168404Spjd if (mkdirp(mountpoint, 0755) != 0) { 291168404Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 292168404Spjd "failed to create mountpoint")); 293168404Spjd return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 294168404Spjd dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 295168404Spjd mountpoint)); 296168404Spjd } 297168404Spjd } 298168404Spjd 299219089Spjd#ifdef sun /* FreeBSD: overlay mounts are not checked. */ 300168404Spjd /* 301168404Spjd * Determine if the mountpoint is empty. If so, refuse to perform the 302168404Spjd * mount. We don't perform this check if MS_OVERLAY is specified, which 303168404Spjd * would defeat the point. We also avoid this check if 'remount' is 304168404Spjd * specified. 305168404Spjd */ 306168404Spjd if ((flags & MS_OVERLAY) == 0 && 307168404Spjd strstr(mntopts, MNTOPT_REMOUNT) == NULL && 308168404Spjd !dir_is_empty(mountpoint)) { 309168404Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 310168404Spjd "directory is not empty")); 311168404Spjd return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 312168404Spjd dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); 313168404Spjd } 314168404Spjd#endif 315168404Spjd 316168404Spjd /* perform the mount */ 317168404Spjd if (zmount(zfs_get_name(zhp), mountpoint, flags, 318168404Spjd MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { 319168404Spjd /* 320168404Spjd * Generic errors are nasty, but there are just way too many 321168404Spjd * from mount(), and they're well-understood. We pick a few 322168404Spjd * common ones to improve upon. 323168404Spjd */ 324185029Spjd if (errno == EBUSY) { 325168404Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 326168404Spjd "mountpoint or dataset is busy")); 327185029Spjd } else if (errno == EPERM) { 328185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 329185029Spjd "Insufficient privileges")); 330219089Spjd } else if (errno == ENOTSUP) { 331219089Spjd char buf[256]; 332219089Spjd int spa_version; 333219089Spjd 334219089Spjd VERIFY(zfs_spa_version(zhp, &spa_version) == 0); 335219089Spjd (void) snprintf(buf, sizeof (buf), 336219089Spjd dgettext(TEXT_DOMAIN, "Can't mount a version %lld " 337219089Spjd "file system on a version %d pool. Pool must be" 338219089Spjd " upgraded to mount this file system."), 339219089Spjd (u_longlong_t)zfs_prop_get_int(zhp, 340219089Spjd ZFS_PROP_VERSION), spa_version); 341219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); 342185029Spjd } else { 343168404Spjd zfs_error_aux(hdl, strerror(errno)); 344185029Spjd } 345168404Spjd return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 346168404Spjd dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 347168404Spjd zhp->zfs_name)); 348168404Spjd } 349168404Spjd 350209962Smm /* add the mounted entry into our cache */ 351209962Smm libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, 352209962Smm mntopts); 353168404Spjd return (0); 354168404Spjd} 355168404Spjd 356168404Spjd/* 357168404Spjd * Unmount a single filesystem. 358168404Spjd */ 359168404Spjdstatic int 360168404Spjdunmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) 361168404Spjd{ 362219089Spjd if (umount2(mountpoint, flags) != 0) { 363168404Spjd zfs_error_aux(hdl, strerror(errno)); 364168404Spjd return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, 365168404Spjd dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), 366168404Spjd mountpoint)); 367168404Spjd } 368168404Spjd 369168404Spjd return (0); 370168404Spjd} 371168404Spjd 372168404Spjd/* 373168404Spjd * Unmount the given filesystem. 374168404Spjd */ 375168404Spjdint 376168404Spjdzfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) 377168404Spjd{ 378209962Smm libzfs_handle_t *hdl = zhp->zfs_hdl; 379209962Smm struct mnttab entry; 380185029Spjd char *mntpt = NULL; 381168404Spjd 382209962Smm /* check to see if we need to unmount the filesystem */ 383168404Spjd if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 384209962Smm libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { 385185029Spjd /* 386185029Spjd * mountpoint may have come from a call to 387185029Spjd * getmnt/getmntany if it isn't NULL. If it is NULL, 388209962Smm * we know it comes from libzfs_mnttab_find which can 389209962Smm * then get freed later. We strdup it to play it safe. 390185029Spjd */ 391168404Spjd if (mountpoint == NULL) 392209962Smm mntpt = zfs_strdup(hdl, entry.mnt_mountp); 393185029Spjd else 394209962Smm mntpt = zfs_strdup(hdl, mountpoint); 395168404Spjd 396168404Spjd /* 397168404Spjd * Unshare and unmount the filesystem 398168404Spjd */ 399185029Spjd if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) 400168404Spjd return (-1); 401185029Spjd 402209962Smm if (unmount_one(hdl, mntpt, flags) != 0) { 403185029Spjd free(mntpt); 404185029Spjd (void) zfs_shareall(zhp); 405185029Spjd return (-1); 406185029Spjd } 407209962Smm libzfs_mnttab_remove(hdl, zhp->zfs_name); 408185029Spjd free(mntpt); 409168404Spjd } 410168404Spjd 411168404Spjd return (0); 412168404Spjd} 413168404Spjd 414168404Spjd/* 415168404Spjd * Unmount this filesystem and any children inheriting the mountpoint property. 416168404Spjd * To do this, just act like we're changing the mountpoint property, but don't 417168404Spjd * remount the filesystems afterwards. 418168404Spjd */ 419168404Spjdint 420168404Spjdzfs_unmountall(zfs_handle_t *zhp, int flags) 421168404Spjd{ 422168404Spjd prop_changelist_t *clp; 423168404Spjd int ret; 424168404Spjd 425185029Spjd clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); 426168404Spjd if (clp == NULL) 427168404Spjd return (-1); 428168404Spjd 429168404Spjd ret = changelist_prefix(clp); 430168404Spjd changelist_free(clp); 431168404Spjd 432168404Spjd return (ret); 433168404Spjd} 434168404Spjd 435168404Spjdboolean_t 436168404Spjdzfs_is_shared(zfs_handle_t *zhp) 437168404Spjd{ 438185029Spjd zfs_share_type_t rc = 0; 439185029Spjd zfs_share_proto_t *curr_proto; 440185029Spjd 441168404Spjd if (ZFS_IS_VOLUME(zhp)) 442219089Spjd return (B_FALSE); 443168404Spjd 444185029Spjd for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 445185029Spjd curr_proto++) 446185029Spjd rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); 447185029Spjd 448185029Spjd return (rc ? B_TRUE : B_FALSE); 449168404Spjd} 450168404Spjd 451168404Spjdint 452168404Spjdzfs_share(zfs_handle_t *zhp) 453168404Spjd{ 454219089Spjd assert(!ZFS_IS_VOLUME(zhp)); 455185029Spjd return (zfs_share_proto(zhp, share_all_proto)); 456168404Spjd} 457168404Spjd 458168404Spjdint 459168404Spjdzfs_unshare(zfs_handle_t *zhp) 460168404Spjd{ 461219089Spjd assert(!ZFS_IS_VOLUME(zhp)); 462185029Spjd return (zfs_unshareall(zhp)); 463168404Spjd} 464168404Spjd 465168404Spjd/* 466168404Spjd * Check to see if the filesystem is currently shared. 467168404Spjd */ 468185029Spjdzfs_share_type_t 469185029Spjdzfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) 470168404Spjd{ 471168404Spjd char *mountpoint; 472185029Spjd zfs_share_type_t rc; 473168404Spjd 474168404Spjd if (!zfs_is_mounted(zhp, &mountpoint)) 475185029Spjd return (SHARED_NOT_SHARED); 476168404Spjd 477185029Spjd if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) { 478168404Spjd if (where != NULL) 479168404Spjd *where = mountpoint; 480168404Spjd else 481168404Spjd free(mountpoint); 482185029Spjd return (rc); 483168404Spjd } else { 484168404Spjd free(mountpoint); 485185029Spjd return (SHARED_NOT_SHARED); 486168404Spjd } 487168404Spjd} 488168404Spjd 489185029Spjdboolean_t 490185029Spjdzfs_is_shared_nfs(zfs_handle_t *zhp, char **where) 491185029Spjd{ 492185029Spjd return (zfs_is_shared_proto(zhp, where, 493185029Spjd PROTO_NFS) != SHARED_NOT_SHARED); 494185029Spjd} 495185029Spjd 496185029Spjdboolean_t 497185029Spjdzfs_is_shared_smb(zfs_handle_t *zhp, char **where) 498185029Spjd{ 499185029Spjd return (zfs_is_shared_proto(zhp, where, 500185029Spjd PROTO_SMB) != SHARED_NOT_SHARED); 501185029Spjd} 502185029Spjd 503168404Spjd/* 504185029Spjd * Make sure things will work if libshare isn't installed by using 505185029Spjd * wrapper functions that check to see that the pointers to functions 506185029Spjd * initialized in _zfs_init_libshare() are actually present. 507168404Spjd */ 508185029Spjd 509219089Spjd#ifdef sun 510185029Spjdstatic sa_handle_t (*_sa_init)(int); 511185029Spjdstatic void (*_sa_fini)(sa_handle_t); 512185029Spjdstatic sa_share_t (*_sa_find_share)(sa_handle_t, char *); 513185029Spjdstatic int (*_sa_enable_share)(sa_share_t, char *); 514185029Spjdstatic int (*_sa_disable_share)(sa_share_t, char *); 515185029Spjdstatic char *(*_sa_errorstr)(int); 516185029Spjdstatic int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); 517185029Spjdstatic boolean_t (*_sa_needs_refresh)(sa_handle_t *); 518185029Spjdstatic libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); 519185029Spjdstatic int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, 520185029Spjd char *, char *, zprop_source_t, char *, char *, char *); 521185029Spjdstatic void (*_sa_update_sharetab_ts)(sa_handle_t); 522185029Spjd#endif 523185029Spjd 524185029Spjd/* 525185029Spjd * _zfs_init_libshare() 526185029Spjd * 527185029Spjd * Find the libshare.so.1 entry points that we use here and save the 528185029Spjd * values to be used later. This is triggered by the runtime loader. 529185029Spjd * Make sure the correct ISA version is loaded. 530185029Spjd */ 531185029Spjd 532185029Spjd#pragma init(_zfs_init_libshare) 533185029Spjdstatic void 534185029Spjd_zfs_init_libshare(void) 535185029Spjd{ 536219089Spjd#ifdef sun 537185029Spjd void *libshare; 538185029Spjd char path[MAXPATHLEN]; 539185029Spjd char isa[MAXISALEN]; 540185029Spjd 541185029Spjd#if defined(_LP64) 542185029Spjd if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) 543185029Spjd isa[0] = '\0'; 544185029Spjd#else 545185029Spjd isa[0] = '\0'; 546185029Spjd#endif 547185029Spjd (void) snprintf(path, MAXPATHLEN, 548185029Spjd "/usr/lib/%s/libshare.so.1", isa); 549185029Spjd 550185029Spjd if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { 551185029Spjd _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); 552185029Spjd _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); 553185029Spjd _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) 554185029Spjd dlsym(libshare, "sa_find_share"); 555185029Spjd _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 556185029Spjd "sa_enable_share"); 557185029Spjd _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 558185029Spjd "sa_disable_share"); 559185029Spjd _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); 560185029Spjd _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) 561185029Spjd dlsym(libshare, "sa_parse_legacy_options"); 562185029Spjd _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) 563185029Spjd dlsym(libshare, "sa_needs_refresh"); 564185029Spjd _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) 565185029Spjd dlsym(libshare, "sa_get_zfs_handle"); 566185029Spjd _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, 567185029Spjd sa_share_t, char *, char *, zprop_source_t, char *, 568185029Spjd char *, char *))dlsym(libshare, "sa_zfs_process_share"); 569185029Spjd _sa_update_sharetab_ts = (void (*)(sa_handle_t)) 570185029Spjd dlsym(libshare, "sa_update_sharetab_ts"); 571185029Spjd if (_sa_init == NULL || _sa_fini == NULL || 572185029Spjd _sa_find_share == NULL || _sa_enable_share == NULL || 573185029Spjd _sa_disable_share == NULL || _sa_errorstr == NULL || 574185029Spjd _sa_parse_legacy_options == NULL || 575185029Spjd _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || 576185029Spjd _sa_zfs_process_share == NULL || 577185029Spjd _sa_update_sharetab_ts == NULL) { 578185029Spjd _sa_init = NULL; 579185029Spjd _sa_fini = NULL; 580185029Spjd _sa_disable_share = NULL; 581185029Spjd _sa_enable_share = NULL; 582185029Spjd _sa_errorstr = NULL; 583185029Spjd _sa_parse_legacy_options = NULL; 584185029Spjd (void) dlclose(libshare); 585185029Spjd _sa_needs_refresh = NULL; 586185029Spjd _sa_get_zfs_handle = NULL; 587185029Spjd _sa_zfs_process_share = NULL; 588185029Spjd _sa_update_sharetab_ts = NULL; 589185029Spjd } 590185029Spjd } 591185029Spjd#endif 592185029Spjd} 593185029Spjd 594185029Spjd/* 595185029Spjd * zfs_init_libshare(zhandle, service) 596185029Spjd * 597185029Spjd * Initialize the libshare API if it hasn't already been initialized. 598185029Spjd * In all cases it returns 0 if it succeeded and an error if not. The 599185029Spjd * service value is which part(s) of the API to initialize and is a 600185029Spjd * direct map to the libshare sa_init(service) interface. 601185029Spjd */ 602168404Spjdint 603185029Spjdzfs_init_libshare(libzfs_handle_t *zhandle, int service) 604168404Spjd{ 605185029Spjd int ret = SA_OK; 606168404Spjd 607219089Spjd#ifdef sun 608185029Spjd if (_sa_init == NULL) 609185029Spjd ret = SA_CONFIG_ERR; 610168404Spjd 611185029Spjd if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) { 612185029Spjd /* 613185029Spjd * We had a cache miss. Most likely it is a new ZFS 614185029Spjd * dataset that was just created. We want to make sure 615185029Spjd * so check timestamps to see if a different process 616185029Spjd * has updated any of the configuration. If there was 617185029Spjd * some non-ZFS change, we need to re-initialize the 618185029Spjd * internal cache. 619185029Spjd */ 620185029Spjd zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS; 621185029Spjd if (_sa_needs_refresh != NULL && 622185029Spjd _sa_needs_refresh(zhandle->libzfs_sharehdl)) { 623185029Spjd zfs_uninit_libshare(zhandle); 624185029Spjd zhandle->libzfs_sharehdl = _sa_init(service); 625185029Spjd } 626185029Spjd } 627168404Spjd 628185029Spjd if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) 629185029Spjd zhandle->libzfs_sharehdl = _sa_init(service); 630168404Spjd 631185029Spjd if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) 632185029Spjd ret = SA_NO_MEMORY; 633185029Spjd#endif 634168404Spjd 635185029Spjd return (ret); 636185029Spjd} 637185029Spjd 638185029Spjd/* 639185029Spjd * zfs_uninit_libshare(zhandle) 640185029Spjd * 641185029Spjd * Uninitialize the libshare API if it hasn't already been 642185029Spjd * uninitialized. It is OK to call multiple times. 643185029Spjd */ 644185029Spjdvoid 645185029Spjdzfs_uninit_libshare(libzfs_handle_t *zhandle) 646185029Spjd{ 647185029Spjd if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { 648219089Spjd#ifdef sun 649185029Spjd if (_sa_fini != NULL) 650185029Spjd _sa_fini(zhandle->libzfs_sharehdl); 651185029Spjd#endif 652185029Spjd zhandle->libzfs_sharehdl = NULL; 653168404Spjd } 654185029Spjd} 655185029Spjd 656185029Spjd/* 657185029Spjd * zfs_parse_options(options, proto) 658185029Spjd * 659185029Spjd * Call the legacy parse interface to get the protocol specific 660185029Spjd * options using the NULL arg to indicate that this is a "parse" only. 661185029Spjd */ 662185029Spjdint 663185029Spjdzfs_parse_options(char *options, zfs_share_proto_t proto) 664185029Spjd{ 665219089Spjd#ifdef sun 666185029Spjd if (_sa_parse_legacy_options != NULL) { 667185029Spjd return (_sa_parse_legacy_options(NULL, options, 668185029Spjd proto_table[proto].p_name)); 669168404Spjd } 670185029Spjd return (SA_CONFIG_ERR); 671168404Spjd#else 672185029Spjd return (SA_OK); 673185029Spjd#endif 674185029Spjd} 675168404Spjd 676219089Spjd#ifdef sun 677185029Spjd/* 678185029Spjd * zfs_sa_find_share(handle, path) 679185029Spjd * 680185029Spjd * wrapper around sa_find_share to find a share path in the 681185029Spjd * configuration. 682185029Spjd */ 683185029Spjdstatic sa_share_t 684185029Spjdzfs_sa_find_share(sa_handle_t handle, char *path) 685185029Spjd{ 686185029Spjd if (_sa_find_share != NULL) 687185029Spjd return (_sa_find_share(handle, path)); 688185029Spjd return (NULL); 689185029Spjd} 690168404Spjd 691185029Spjd/* 692185029Spjd * zfs_sa_enable_share(share, proto) 693185029Spjd * 694185029Spjd * Wrapper for sa_enable_share which enables a share for a specified 695185029Spjd * protocol. 696185029Spjd */ 697185029Spjdstatic int 698185029Spjdzfs_sa_enable_share(sa_share_t share, char *proto) 699185029Spjd{ 700185029Spjd if (_sa_enable_share != NULL) 701185029Spjd return (_sa_enable_share(share, proto)); 702185029Spjd return (SA_CONFIG_ERR); 703185029Spjd} 704168404Spjd 705185029Spjd/* 706185029Spjd * zfs_sa_disable_share(share, proto) 707185029Spjd * 708185029Spjd * Wrapper for sa_enable_share which disables a share for a specified 709185029Spjd * protocol. 710185029Spjd */ 711185029Spjdstatic int 712185029Spjdzfs_sa_disable_share(sa_share_t share, char *proto) 713185029Spjd{ 714185029Spjd if (_sa_disable_share != NULL) 715185029Spjd return (_sa_disable_share(share, proto)); 716185029Spjd return (SA_CONFIG_ERR); 717185029Spjd} 718219089Spjd#endif /* sun */ 719168404Spjd 720185029Spjd/* 721185029Spjd * Share the given filesystem according to the options in the specified 722185029Spjd * protocol specific properties (sharenfs, sharesmb). We rely 723185029Spjd * on "libshare" to the dirty work for us. 724185029Spjd */ 725185029Spjdstatic int 726185029Spjdzfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 727185029Spjd{ 728185029Spjd char mountpoint[ZFS_MAXPROPLEN]; 729185029Spjd char shareopts[ZFS_MAXPROPLEN]; 730185029Spjd char sourcestr[ZFS_MAXPROPLEN]; 731185029Spjd libzfs_handle_t *hdl = zhp->zfs_hdl; 732185029Spjd zfs_share_proto_t *curr_proto; 733185029Spjd zprop_source_t sourcetype; 734185029Spjd int error, ret; 735168404Spjd 736185029Spjd if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 737185029Spjd return (0); 738168404Spjd 739219089Spjd#ifdef sun 740219089Spjd if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { 741219089Spjd (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 742219089Spjd dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), 743219089Spjd zfs_get_name(zhp), _sa_errorstr != NULL ? 744219089Spjd _sa_errorstr(ret) : ""); 745219089Spjd return (-1); 746219089Spjd } 747219089Spjd#endif 748219089Spjd 749185029Spjd for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { 750185029Spjd /* 751185029Spjd * Return success if there are no share options. 752185029Spjd */ 753185029Spjd if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, 754185029Spjd shareopts, sizeof (shareopts), &sourcetype, sourcestr, 755185029Spjd ZFS_MAXPROPLEN, B_FALSE) != 0 || 756185029Spjd strcmp(shareopts, "off") == 0) 757185029Spjd continue; 758168404Spjd 759185029Spjd /* 760185029Spjd * If the 'zoned' property is set, then zfs_is_mountable() 761185029Spjd * will have already bailed out if we are in the global zone. 762185029Spjd * But local zones cannot be NFS servers, so we ignore it for 763185029Spjd * local zones as well. 764185029Spjd */ 765185029Spjd if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) 766185029Spjd continue; 767185029Spjd 768219089Spjd#ifdef sun 769185029Spjd share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); 770185029Spjd if (share == NULL) { 771185029Spjd /* 772185029Spjd * This may be a new file system that was just 773185029Spjd * created so isn't in the internal cache 774185029Spjd * (second time through). Rather than 775185029Spjd * reloading the entire configuration, we can 776185029Spjd * assume ZFS has done the checking and it is 777185029Spjd * safe to add this to the internal 778185029Spjd * configuration. 779185029Spjd */ 780185029Spjd if (_sa_zfs_process_share(hdl->libzfs_sharehdl, 781185029Spjd NULL, NULL, mountpoint, 782185029Spjd proto_table[*curr_proto].p_name, sourcetype, 783185029Spjd shareopts, sourcestr, zhp->zfs_name) != SA_OK) { 784185029Spjd (void) zfs_error_fmt(hdl, 785185029Spjd proto_table[*curr_proto].p_share_err, 786185029Spjd dgettext(TEXT_DOMAIN, "cannot share '%s'"), 787185029Spjd zfs_get_name(zhp)); 788185029Spjd return (-1); 789185029Spjd } 790185029Spjd hdl->libzfs_shareflags |= ZFSSHARE_MISS; 791185029Spjd share = zfs_sa_find_share(hdl->libzfs_sharehdl, 792185029Spjd mountpoint); 793185029Spjd } 794185029Spjd if (share != NULL) { 795185029Spjd int err; 796185029Spjd err = zfs_sa_enable_share(share, 797185029Spjd proto_table[*curr_proto].p_name); 798185029Spjd if (err != SA_OK) { 799185029Spjd (void) zfs_error_fmt(hdl, 800185029Spjd proto_table[*curr_proto].p_share_err, 801185029Spjd dgettext(TEXT_DOMAIN, "cannot share '%s'"), 802185029Spjd zfs_get_name(zhp)); 803185029Spjd return (-1); 804185029Spjd } 805185029Spjd } else 806185029Spjd#else 807219089Spjd if (*curr_proto != PROTO_NFS) { 808219089Spjd fprintf(stderr, "Unsupported share protocol: %d.\n", 809219089Spjd *curr_proto); 810219089Spjd continue; 811219089Spjd } 812219089Spjd 813185029Spjd if (strcmp(shareopts, "on") == 0) 814185029Spjd error = fsshare(ZFS_EXPORTS_PATH, mountpoint, ""); 815185029Spjd else 816185029Spjd error = fsshare(ZFS_EXPORTS_PATH, mountpoint, shareopts); 817185029Spjd if (error != 0) 818168404Spjd#endif 819185029Spjd { 820185029Spjd (void) zfs_error_fmt(hdl, 821185029Spjd proto_table[*curr_proto].p_share_err, 822185029Spjd dgettext(TEXT_DOMAIN, "cannot share '%s'"), 823185029Spjd zfs_get_name(zhp)); 824185029Spjd return (-1); 825185029Spjd } 826219089Spjd 827185029Spjd } 828168404Spjd return (0); 829168404Spjd} 830168404Spjd 831185029Spjd 832185029Spjdint 833185029Spjdzfs_share_nfs(zfs_handle_t *zhp) 834185029Spjd{ 835185029Spjd return (zfs_share_proto(zhp, nfs_only)); 836185029Spjd} 837185029Spjd 838185029Spjdint 839185029Spjdzfs_share_smb(zfs_handle_t *zhp) 840185029Spjd{ 841185029Spjd return (zfs_share_proto(zhp, smb_only)); 842185029Spjd} 843185029Spjd 844185029Spjdint 845185029Spjdzfs_shareall(zfs_handle_t *zhp) 846185029Spjd{ 847185029Spjd return (zfs_share_proto(zhp, share_all_proto)); 848185029Spjd} 849185029Spjd 850168404Spjd/* 851168404Spjd * Unshare a filesystem by mountpoint. 852168404Spjd */ 853168404Spjdstatic int 854185029Spjdunshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, 855185029Spjd zfs_share_proto_t proto) 856168404Spjd{ 857219089Spjd#ifdef sun 858219089Spjd sa_share_t share; 859219089Spjd int err; 860219089Spjd char *mntpt; 861219089Spjd /* 862219089Spjd * Mountpoint could get trashed if libshare calls getmntany 863219089Spjd * which it does during API initialization, so strdup the 864219089Spjd * value. 865219089Spjd */ 866219089Spjd mntpt = zfs_strdup(hdl, mountpoint); 867219089Spjd 868219089Spjd /* make sure libshare initialized */ 869219089Spjd if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { 870219089Spjd free(mntpt); /* don't need the copy anymore */ 871219089Spjd return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 872219089Spjd dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 873219089Spjd name, _sa_errorstr(err))); 874219089Spjd } 875219089Spjd 876219089Spjd share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); 877219089Spjd free(mntpt); /* don't need the copy anymore */ 878219089Spjd 879219089Spjd if (share != NULL) { 880219089Spjd err = zfs_sa_disable_share(share, proto_table[proto].p_name); 881219089Spjd if (err != SA_OK) { 882219089Spjd return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 883219089Spjd dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 884219089Spjd name, _sa_errorstr(err))); 885219089Spjd } 886219089Spjd } else { 887219089Spjd return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 888219089Spjd dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), 889219089Spjd name)); 890219089Spjd } 891219089Spjd#else 892168404Spjd char buf[MAXPATHLEN]; 893168404Spjd FILE *fp; 894219089Spjd int err; 895168404Spjd 896185029Spjd if (proto != PROTO_NFS) { 897185029Spjd fprintf(stderr, "No SMB support in FreeBSD yet.\n"); 898185029Spjd return (EOPNOTSUPP); 899185029Spjd } 900185029Spjd 901219089Spjd err = fsunshare(ZFS_EXPORTS_PATH, mountpoint); 902219089Spjd if (err != 0) { 903219089Spjd zfs_error_aux(hdl, "%s", strerror(err)); 904168404Spjd return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 905168404Spjd dgettext(TEXT_DOMAIN, 906168404Spjd "cannot unshare '%s'"), name)); 907168404Spjd } 908219089Spjd#endif 909168404Spjd return (0); 910168404Spjd} 911168404Spjd 912168404Spjd/* 913168404Spjd * Unshare the given filesystem. 914168404Spjd */ 915168404Spjdint 916185029Spjdzfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, 917185029Spjd zfs_share_proto_t *proto) 918168404Spjd{ 919209962Smm libzfs_handle_t *hdl = zhp->zfs_hdl; 920209962Smm struct mnttab entry; 921185029Spjd char *mntpt = NULL; 922168404Spjd 923168404Spjd /* check to see if need to unmount the filesystem */ 924168404Spjd rewind(zhp->zfs_hdl->libzfs_mnttab); 925185029Spjd if (mountpoint != NULL) 926209962Smm mountpoint = mntpt = zfs_strdup(hdl, mountpoint); 927185029Spjd 928168404Spjd if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 929209962Smm libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { 930185029Spjd zfs_share_proto_t *curr_proto; 931168404Spjd 932168404Spjd if (mountpoint == NULL) 933185029Spjd mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); 934168404Spjd 935185029Spjd for (curr_proto = proto; *curr_proto != PROTO_END; 936185029Spjd curr_proto++) { 937185029Spjd 938209962Smm if (is_shared(hdl, mntpt, *curr_proto) && 939209962Smm unshare_one(hdl, zhp->zfs_name, 940185029Spjd mntpt, *curr_proto) != 0) { 941185029Spjd if (mntpt != NULL) 942185029Spjd free(mntpt); 943185029Spjd return (-1); 944185029Spjd } 945185029Spjd } 946168404Spjd } 947185029Spjd if (mntpt != NULL) 948185029Spjd free(mntpt); 949168404Spjd 950168404Spjd return (0); 951168404Spjd} 952168404Spjd 953185029Spjdint 954185029Spjdzfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) 955185029Spjd{ 956185029Spjd return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); 957185029Spjd} 958185029Spjd 959185029Spjdint 960185029Spjdzfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) 961185029Spjd{ 962185029Spjd return (zfs_unshare_proto(zhp, mountpoint, smb_only)); 963185029Spjd} 964185029Spjd 965168404Spjd/* 966185029Spjd * Same as zfs_unmountall(), but for NFS and SMB unshares. 967168404Spjd */ 968168404Spjdint 969185029Spjdzfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 970168404Spjd{ 971168404Spjd prop_changelist_t *clp; 972168404Spjd int ret; 973168404Spjd 974185029Spjd clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); 975168404Spjd if (clp == NULL) 976168404Spjd return (-1); 977168404Spjd 978185029Spjd ret = changelist_unshare(clp, proto); 979168404Spjd changelist_free(clp); 980168404Spjd 981168404Spjd return (ret); 982168404Spjd} 983168404Spjd 984185029Spjdint 985185029Spjdzfs_unshareall_nfs(zfs_handle_t *zhp) 986185029Spjd{ 987185029Spjd return (zfs_unshareall_proto(zhp, nfs_only)); 988185029Spjd} 989185029Spjd 990185029Spjdint 991185029Spjdzfs_unshareall_smb(zfs_handle_t *zhp) 992185029Spjd{ 993185029Spjd return (zfs_unshareall_proto(zhp, smb_only)); 994185029Spjd} 995185029Spjd 996185029Spjdint 997185029Spjdzfs_unshareall(zfs_handle_t *zhp) 998185029Spjd{ 999185029Spjd return (zfs_unshareall_proto(zhp, share_all_proto)); 1000185029Spjd} 1001185029Spjd 1002185029Spjdint 1003185029Spjdzfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) 1004185029Spjd{ 1005185029Spjd return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); 1006185029Spjd} 1007185029Spjd 1008168404Spjd/* 1009168404Spjd * Remove the mountpoint associated with the current dataset, if necessary. 1010168404Spjd * We only remove the underlying directory if: 1011168404Spjd * 1012168404Spjd * - The mountpoint is not 'none' or 'legacy' 1013168404Spjd * - The mountpoint is non-empty 1014168404Spjd * - The mountpoint is the default or inherited 1015168404Spjd * - The 'zoned' property is set, or we're in a local zone 1016168404Spjd * 1017168404Spjd * Any other directories we leave alone. 1018168404Spjd */ 1019168404Spjdvoid 1020168404Spjdremove_mountpoint(zfs_handle_t *zhp) 1021168404Spjd{ 1022168404Spjd char mountpoint[ZFS_MAXPROPLEN]; 1023185029Spjd zprop_source_t source; 1024168404Spjd 1025168404Spjd if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), 1026168404Spjd &source)) 1027168404Spjd return; 1028168404Spjd 1029185029Spjd if (source == ZPROP_SRC_DEFAULT || 1030185029Spjd source == ZPROP_SRC_INHERITED) { 1031168404Spjd /* 1032168404Spjd * Try to remove the directory, silently ignoring any errors. 1033168404Spjd * The filesystem may have since been removed or moved around, 1034168404Spjd * and this error isn't really useful to the administrator in 1035168404Spjd * any way. 1036168404Spjd */ 1037168404Spjd (void) rmdir(mountpoint); 1038168404Spjd } 1039168404Spjd} 1040168404Spjd 1041219089Spjdvoid 1042219089Spjdlibzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp) 1043168404Spjd{ 1044219089Spjd if (cbp->cb_alloc == cbp->cb_used) { 1045219089Spjd size_t newsz; 1046219089Spjd void *ptr; 1047185029Spjd 1048219089Spjd newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64; 1049219089Spjd ptr = zfs_realloc(zhp->zfs_hdl, 1050219089Spjd cbp->cb_handles, cbp->cb_alloc * sizeof (void *), 1051219089Spjd newsz * sizeof (void *)); 1052219089Spjd cbp->cb_handles = ptr; 1053219089Spjd cbp->cb_alloc = newsz; 1054185029Spjd } 1055219089Spjd cbp->cb_handles[cbp->cb_used++] = zhp; 1056168404Spjd} 1057168404Spjd 1058168404Spjdstatic int 1059168404Spjdmount_cb(zfs_handle_t *zhp, void *data) 1060168404Spjd{ 1061219089Spjd get_all_cb_t *cbp = data; 1062168404Spjd 1063219089Spjd if (!(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM)) { 1064168404Spjd zfs_close(zhp); 1065168404Spjd return (0); 1066168404Spjd } 1067168404Spjd 1068185029Spjd if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { 1069185029Spjd zfs_close(zhp); 1070185029Spjd return (0); 1071185029Spjd } 1072185029Spjd 1073219089Spjd libzfs_add_handle(cbp, zhp); 1074219089Spjd if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) { 1075219089Spjd zfs_close(zhp); 1076219089Spjd return (-1); 1077168404Spjd } 1078219089Spjd return (0); 1079168404Spjd} 1080168404Spjd 1081219089Spjdint 1082219089Spjdlibzfs_dataset_cmp(const void *a, const void *b) 1083168404Spjd{ 1084168404Spjd zfs_handle_t **za = (zfs_handle_t **)a; 1085168404Spjd zfs_handle_t **zb = (zfs_handle_t **)b; 1086168404Spjd char mounta[MAXPATHLEN]; 1087168404Spjd char mountb[MAXPATHLEN]; 1088168404Spjd boolean_t gota, gotb; 1089168404Spjd 1090168404Spjd if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) 1091168404Spjd verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, 1092168404Spjd sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 1093168404Spjd if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) 1094168404Spjd verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, 1095168404Spjd sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 1096168404Spjd 1097168404Spjd if (gota && gotb) 1098168404Spjd return (strcmp(mounta, mountb)); 1099168404Spjd 1100168404Spjd if (gota) 1101168404Spjd return (-1); 1102168404Spjd if (gotb) 1103168404Spjd return (1); 1104168404Spjd 1105168404Spjd return (strcmp(zfs_get_name(a), zfs_get_name(b))); 1106168404Spjd} 1107168404Spjd 1108168404Spjd/* 1109168404Spjd * Mount and share all datasets within the given pool. This assumes that no 1110168404Spjd * datasets within the pool are currently mounted. Because users can create 1111168404Spjd * complicated nested hierarchies of mountpoints, we first gather all the 1112168404Spjd * datasets and mountpoints within the pool, and sort them by mountpoint. Once 1113168404Spjd * we have the list of all filesystems, we iterate over them in order and mount 1114168404Spjd * and/or share each one. 1115168404Spjd */ 1116168404Spjd#pragma weak zpool_mount_datasets = zpool_enable_datasets 1117168404Spjdint 1118168404Spjdzpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) 1119168404Spjd{ 1120219089Spjd get_all_cb_t cb = { 0 }; 1121168404Spjd libzfs_handle_t *hdl = zhp->zpool_hdl; 1122168404Spjd zfs_handle_t *zfsp; 1123168404Spjd int i, ret = -1; 1124185029Spjd int *good; 1125168404Spjd 1126168404Spjd /* 1127185029Spjd * Gather all non-snap datasets within the pool. 1128168404Spjd */ 1129185029Spjd if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) 1130168404Spjd goto out; 1131168404Spjd 1132219089Spjd libzfs_add_handle(&cb, zfsp); 1133185029Spjd if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) 1134168404Spjd goto out; 1135168404Spjd /* 1136168404Spjd * Sort the datasets by mountpoint. 1137168404Spjd */ 1138219089Spjd qsort(cb.cb_handles, cb.cb_used, sizeof (void *), 1139219089Spjd libzfs_dataset_cmp); 1140168404Spjd 1141168404Spjd /* 1142185029Spjd * And mount all the datasets, keeping track of which ones 1143208472Smm * succeeded or failed. 1144168404Spjd */ 1145208472Smm if ((good = zfs_alloc(zhp->zpool_hdl, 1146208472Smm cb.cb_used * sizeof (int))) == NULL) 1147208472Smm goto out; 1148208472Smm 1149168404Spjd ret = 0; 1150168404Spjd for (i = 0; i < cb.cb_used; i++) { 1151219089Spjd if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0) 1152168404Spjd ret = -1; 1153185029Spjd else 1154185029Spjd good[i] = 1; 1155168404Spjd } 1156168404Spjd 1157185029Spjd /* 1158185029Spjd * Then share all the ones that need to be shared. This needs 1159185029Spjd * to be a separate pass in order to avoid excessive reloading 1160185029Spjd * of the configuration. Good should never be NULL since 1161185029Spjd * zfs_alloc is supposed to exit if memory isn't available. 1162185029Spjd */ 1163185029Spjd for (i = 0; i < cb.cb_used; i++) { 1164219089Spjd if (good[i] && zfs_share(cb.cb_handles[i]) != 0) 1165185029Spjd ret = -1; 1166185029Spjd } 1167185029Spjd 1168185029Spjd free(good); 1169185029Spjd 1170168404Spjdout: 1171168404Spjd for (i = 0; i < cb.cb_used; i++) 1172219089Spjd zfs_close(cb.cb_handles[i]); 1173219089Spjd free(cb.cb_handles); 1174168404Spjd 1175168404Spjd return (ret); 1176168404Spjd} 1177168404Spjd 1178168404Spjdstatic int 1179168404Spjdmountpoint_compare(const void *a, const void *b) 1180168404Spjd{ 1181168404Spjd const char *mounta = *((char **)a); 1182168404Spjd const char *mountb = *((char **)b); 1183168404Spjd 1184168404Spjd return (strcmp(mountb, mounta)); 1185168404Spjd} 1186168404Spjd 1187219089Spjd/* alias for 2002/240 */ 1188219089Spjd#pragma weak zpool_unmount_datasets = zpool_disable_datasets 1189168404Spjd/* 1190168404Spjd * Unshare and unmount all datasets within the given pool. We don't want to 1191168404Spjd * rely on traversing the DSL to discover the filesystems within the pool, 1192168404Spjd * because this may be expensive (if not all of them are mounted), and can fail 1193168404Spjd * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and 1194168404Spjd * gather all the filesystems that are currently mounted. 1195168404Spjd */ 1196168404Spjdint 1197168404Spjdzpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) 1198168404Spjd{ 1199168404Spjd int used, alloc; 1200219089Spjd struct mnttab entry; 1201168404Spjd size_t namelen; 1202168404Spjd char **mountpoints = NULL; 1203168404Spjd zfs_handle_t **datasets = NULL; 1204168404Spjd libzfs_handle_t *hdl = zhp->zpool_hdl; 1205219089Spjd int i; 1206168404Spjd int ret = -1; 1207168404Spjd int flags = (force ? MS_FORCE : 0); 1208168404Spjd 1209168404Spjd namelen = strlen(zhp->zpool_name); 1210168404Spjd 1211219089Spjd rewind(hdl->libzfs_mnttab); 1212168404Spjd used = alloc = 0; 1213219089Spjd while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 1214168404Spjd /* 1215168404Spjd * Ignore non-ZFS entries. 1216168404Spjd */ 1217219089Spjd if (entry.mnt_fstype == NULL || 1218219089Spjd strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 1219168404Spjd continue; 1220168404Spjd 1221168404Spjd /* 1222168404Spjd * Ignore filesystems not within this pool. 1223168404Spjd */ 1224219089Spjd if (entry.mnt_mountp == NULL || 1225219089Spjd strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || 1226219089Spjd (entry.mnt_special[namelen] != '/' && 1227219089Spjd entry.mnt_special[namelen] != '\0')) 1228168404Spjd continue; 1229168404Spjd 1230168404Spjd /* 1231168404Spjd * At this point we've found a filesystem within our pool. Add 1232168404Spjd * it to our growing list. 1233168404Spjd */ 1234168404Spjd if (used == alloc) { 1235168404Spjd if (alloc == 0) { 1236168404Spjd if ((mountpoints = zfs_alloc(hdl, 1237168404Spjd 8 * sizeof (void *))) == NULL) 1238168404Spjd goto out; 1239168404Spjd 1240168404Spjd if ((datasets = zfs_alloc(hdl, 1241168404Spjd 8 * sizeof (void *))) == NULL) 1242168404Spjd goto out; 1243168404Spjd 1244168404Spjd alloc = 8; 1245168404Spjd } else { 1246168404Spjd void *ptr; 1247168404Spjd 1248168404Spjd if ((ptr = zfs_realloc(hdl, mountpoints, 1249168404Spjd alloc * sizeof (void *), 1250168404Spjd alloc * 2 * sizeof (void *))) == NULL) 1251168404Spjd goto out; 1252168404Spjd mountpoints = ptr; 1253168404Spjd 1254168404Spjd if ((ptr = zfs_realloc(hdl, datasets, 1255168404Spjd alloc * sizeof (void *), 1256168404Spjd alloc * 2 * sizeof (void *))) == NULL) 1257168404Spjd goto out; 1258168404Spjd datasets = ptr; 1259168404Spjd 1260168404Spjd alloc *= 2; 1261168404Spjd } 1262168404Spjd } 1263168404Spjd 1264168404Spjd if ((mountpoints[used] = zfs_strdup(hdl, 1265219089Spjd entry.mnt_mountp)) == NULL) 1266168404Spjd goto out; 1267168404Spjd 1268168404Spjd /* 1269168404Spjd * This is allowed to fail, in case there is some I/O error. It 1270168404Spjd * is only used to determine if we need to remove the underlying 1271168404Spjd * mountpoint, so failure is not fatal. 1272168404Spjd */ 1273219089Spjd datasets[used] = make_dataset_handle(hdl, entry.mnt_special); 1274168404Spjd 1275168404Spjd used++; 1276168404Spjd } 1277168404Spjd 1278168404Spjd /* 1279168404Spjd * At this point, we have the entire list of filesystems, so sort it by 1280168404Spjd * mountpoint. 1281168404Spjd */ 1282168404Spjd qsort(mountpoints, used, sizeof (char *), mountpoint_compare); 1283168404Spjd 1284168404Spjd /* 1285168404Spjd * Walk through and first unshare everything. 1286168404Spjd */ 1287168404Spjd for (i = 0; i < used; i++) { 1288185029Spjd zfs_share_proto_t *curr_proto; 1289185029Spjd for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 1290185029Spjd curr_proto++) { 1291185029Spjd if (is_shared(hdl, mountpoints[i], *curr_proto) && 1292185029Spjd unshare_one(hdl, mountpoints[i], 1293185029Spjd mountpoints[i], *curr_proto) != 0) 1294185029Spjd goto out; 1295185029Spjd } 1296168404Spjd } 1297168404Spjd 1298168404Spjd /* 1299168404Spjd * Now unmount everything, removing the underlying directories as 1300168404Spjd * appropriate. 1301168404Spjd */ 1302168404Spjd for (i = 0; i < used; i++) { 1303168404Spjd if (unmount_one(hdl, mountpoints[i], flags) != 0) 1304168404Spjd goto out; 1305168404Spjd } 1306168404Spjd 1307168404Spjd for (i = 0; i < used; i++) { 1308168404Spjd if (datasets[i]) 1309168404Spjd remove_mountpoint(datasets[i]); 1310168404Spjd } 1311168404Spjd 1312168404Spjd ret = 0; 1313168404Spjdout: 1314168404Spjd for (i = 0; i < used; i++) { 1315168404Spjd if (datasets[i]) 1316168404Spjd zfs_close(datasets[i]); 1317168404Spjd free(mountpoints[i]); 1318168404Spjd } 1319168404Spjd free(datasets); 1320168404Spjd free(mountpoints); 1321168404Spjd 1322168404Spjd return (ret); 1323168404Spjd} 1324