1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Routines to manage ZFS mounts. We separate all the nasty routines that have 29 * to deal with the OS. The following functions are the main entry points -- 30 * they are used by mount and unmount and when changing a filesystem's 31 * mountpoint. 32 * 33 * zfs_is_mounted() 34 * zfs_mount() 35 * zfs_unmount() 36 * zfs_unmountall() 37 * 38 * This file also contains the functions used to manage sharing filesystems via 39 * NFS and iSCSI: 40 * 41 * zfs_is_shared() 42 * zfs_share() 43 * zfs_unshare() 44 * 45 * zfs_is_shared_nfs() 46 * zfs_is_shared_smb() 47 * zfs_is_shared_iscsi() 48 * zfs_share_proto() 49 * zfs_shareall(); 50 * zfs_share_iscsi() 51 * zfs_unshare_nfs() 52 * zfs_unshare_smb() 53 * zfs_unshareall_nfs() 54 * zfs_unshareall_smb() 55 * zfs_unshareall() 56 * zfs_unshareall_bypath() 57 * zfs_unshare_iscsi() 58 * 59 * The following functions are available for pool consumers, and will 60 * mount/unmount and share/unshare all datasets within pool: 61 * 62 * zpool_enable_datasets() 63 * zpool_disable_datasets() 64 */ 65 66 #include <dirent.h> 67 #include <dlfcn.h> 68 #include <errno.h> 69 #include <libgen.h> 70 #include <libintl.h> 71 #include <stdio.h> 72 #include <stdlib.h> 73 #include <strings.h> 74 #include <unistd.h> 75 #include <zone.h> 76 #include <sys/mntent.h> 77 #include <sys/mount.h> 78 #include <sys/stat.h> 79 80 #include <libzfs.h> 81 82 #include "libzfs_impl.h" 83 84 #include <libshare.h> 85 #include <sys/systeminfo.h> 86 #define MAXISALEN 257 /* based on sysinfo(2) man page */ 87 88 static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *); 89 zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **, 90 zfs_share_proto_t); 91 92 static int (*iscsitgt_zfs_share)(const char *); 93 static int (*iscsitgt_zfs_unshare)(const char *); 94 static int (*iscsitgt_zfs_is_shared)(const char *); 95 static int (*iscsitgt_svc_online)(); 96 97 /* 98 * The share protocols table must be in the same order as the zfs_share_prot_t 99 * enum in libzfs_impl.h 100 */ 101 typedef struct { 102 zfs_prop_t p_prop; 103 char *p_name; 104 int p_share_err; 105 int p_unshare_err; 106 } proto_table_t; 107 108 proto_table_t proto_table[PROTO_END] = { 109 {ZFS_PROP_SHARENFS, "nfs", EZFS_SHARENFSFAILED, EZFS_UNSHARENFSFAILED}, 110 {ZFS_PROP_SHARESMB, "smb", EZFS_SHARESMBFAILED, EZFS_UNSHARESMBFAILED}, 111 }; 112 113 zfs_share_proto_t nfs_only[] = { 114 PROTO_NFS, 115 PROTO_END 116 }; 117 118 zfs_share_proto_t smb_only[] = { 119 PROTO_SMB, 120 PROTO_END 121 }; 122 zfs_share_proto_t share_all_proto[] = { 123 PROTO_NFS, 124 PROTO_SMB, 125 PROTO_END 126 }; 127 128 #pragma init(zfs_iscsi_init) 129 static void 130 zfs_iscsi_init(void) 131 { 132 void *libiscsitgt; 133 134 if ((libiscsitgt = dlopen("/lib/libiscsitgt.so.1", 135 RTLD_LAZY | RTLD_GLOBAL)) == NULL || 136 (iscsitgt_zfs_share = (int (*)(const char *))dlsym(libiscsitgt, 137 "iscsitgt_zfs_share")) == NULL || 138 (iscsitgt_zfs_unshare = (int (*)(const char *))dlsym(libiscsitgt, 139 "iscsitgt_zfs_unshare")) == NULL || 140 (iscsitgt_zfs_is_shared = (int (*)(const char *))dlsym(libiscsitgt, 141 "iscsitgt_zfs_is_shared")) == NULL || 142 (iscsitgt_svc_online = (int (*)(const char *))dlsym(libiscsitgt, 143 "iscsitgt_svc_online")) == NULL) { 144 iscsitgt_zfs_share = NULL; 145 iscsitgt_zfs_unshare = NULL; 146 iscsitgt_zfs_is_shared = NULL; 147 iscsitgt_svc_online = NULL; 148 } 149 } 150 151 /* 152 * Search the sharetab for the given mountpoint and protocol, returning 153 * a zfs_share_type_t value. 154 */ 155 static zfs_share_type_t 156 is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto) 157 { 158 char buf[MAXPATHLEN], *tab; 159 char *ptr; 160 161 if (hdl->libzfs_sharetab == NULL) 162 return (SHARED_NOT_SHARED); 163 164 (void) fseek(hdl->libzfs_sharetab, 0, SEEK_SET); 165 166 while (fgets(buf, sizeof (buf), hdl->libzfs_sharetab) != NULL) { 167 168 /* the mountpoint is the first entry on each line */ 169 if ((tab = strchr(buf, '\t')) == NULL) 170 continue; 171 172 *tab = '\0'; 173 if (strcmp(buf, mountpoint) == 0) { 174 /* 175 * the protocol field is the third field 176 * skip over second field 177 */ 178 ptr = ++tab; 179 if ((tab = strchr(ptr, '\t')) == NULL) 180 continue; 181 ptr = ++tab; 182 if ((tab = strchr(ptr, '\t')) == NULL) 183 continue; 184 *tab = '\0'; 185 if (strcmp(ptr, 186 proto_table[proto].p_name) == 0) { 187 switch (proto) { 188 case PROTO_NFS: 189 return (SHARED_NFS); 190 case PROTO_SMB: 191 return (SHARED_SMB); 192 default: 193 return (0); 194 } 195 } 196 } 197 } 198 199 return (SHARED_NOT_SHARED); 200 } 201 202 /* 203 * Returns true if the specified directory is empty. If we can't open the 204 * directory at all, return true so that the mount can fail with a more 205 * informative error message. 206 */ 207 static boolean_t 208 dir_is_empty(const char *dirname) 209 { 210 DIR *dirp; 211 struct dirent64 *dp; 212 213 if ((dirp = opendir(dirname)) == NULL) 214 return (B_TRUE); 215 216 while ((dp = readdir64(dirp)) != NULL) { 217 218 if (strcmp(dp->d_name, ".") == 0 || 219 strcmp(dp->d_name, "..") == 0) 220 continue; 221 222 (void) closedir(dirp); 223 return (B_FALSE); 224 } 225 226 (void) closedir(dirp); 227 return (B_TRUE); 228 } 229 230 /* 231 * Checks to see if the mount is active. If the filesystem is mounted, we fill 232 * in 'where' with the current mountpoint, and return 1. Otherwise, we return 233 * 0. 234 */ 235 boolean_t 236 is_mounted(libzfs_handle_t *zfs_hdl, const char *special, char **where) 237 { 238 struct mnttab entry; 239 240 if (libzfs_mnttab_find(zfs_hdl, special, &entry) != 0) 241 return (B_FALSE); 242 243 if (where != NULL) 244 *where = zfs_strdup(zfs_hdl, entry.mnt_mountp); 245 246 return (B_TRUE); 247 } 248 249 boolean_t 250 zfs_is_mounted(zfs_handle_t *zhp, char **where) 251 { 252 return (is_mounted(zhp->zfs_hdl, zfs_get_name(zhp), where)); 253 } 254 255 /* 256 * Returns true if the given dataset is mountable, false otherwise. Returns the 257 * mountpoint in 'buf'. 258 */ 259 static boolean_t 260 zfs_is_mountable(zfs_handle_t *zhp, char *buf, size_t buflen, 261 zprop_source_t *source) 262 { 263 char sourceloc[ZFS_MAXNAMELEN]; 264 zprop_source_t sourcetype; 265 266 if (!zfs_prop_valid_for_type(ZFS_PROP_MOUNTPOINT, zhp->zfs_type)) 267 return (B_FALSE); 268 269 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, buf, buflen, 270 &sourcetype, sourceloc, sizeof (sourceloc), B_FALSE) == 0); 271 272 if (strcmp(buf, ZFS_MOUNTPOINT_NONE) == 0 || 273 strcmp(buf, ZFS_MOUNTPOINT_LEGACY) == 0) 274 return (B_FALSE); 275 276 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_OFF) 277 return (B_FALSE); 278 279 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED) && 280 getzoneid() == GLOBAL_ZONEID) 281 return (B_FALSE); 282 283 if (source) 284 *source = sourcetype; 285 286 return (B_TRUE); 287 } 288 289 /* 290 * Mount the given filesystem. 291 */ 292 int 293 zfs_mount(zfs_handle_t *zhp, const char *options, int flags) 294 { 295 struct stat buf; 296 char mountpoint[ZFS_MAXPROPLEN]; 297 char mntopts[MNT_LINE_MAX]; 298 libzfs_handle_t *hdl = zhp->zfs_hdl; 299 300 if (options == NULL) 301 mntopts[0] = '\0'; 302 else 303 (void) strlcpy(mntopts, options, sizeof (mntopts)); 304 305 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 306 return (0); 307 308 /* Create the directory if it doesn't already exist */ 309 if (lstat(mountpoint, &buf) != 0) { 310 if (mkdirp(mountpoint, 0755) != 0) { 311 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 312 "failed to create mountpoint")); 313 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 314 dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 315 mountpoint)); 316 } 317 } 318 319 /* 320 * Determine if the mountpoint is empty. If so, refuse to perform the 321 * mount. We don't perform this check if MS_OVERLAY is specified, which 322 * would defeat the point. We also avoid this check if 'remount' is 323 * specified. 324 */ 325 if ((flags & MS_OVERLAY) == 0 && 326 strstr(mntopts, MNTOPT_REMOUNT) == NULL && 327 !dir_is_empty(mountpoint)) { 328 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 329 "directory is not empty")); 330 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 331 dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); 332 } 333 334 /* perform the mount */ 335 if (mount(zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, 336 MNTTYPE_ZFS, NULL, 0, mntopts, sizeof (mntopts)) != 0) { 337 /* 338 * Generic errors are nasty, but there are just way too many 339 * from mount(), and they're well-understood. We pick a few 340 * common ones to improve upon. 341 */ 342 if (errno == EBUSY) { 343 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 344 "mountpoint or dataset is busy")); 345 } else if (errno == EPERM) { 346 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 347 "Insufficient privileges")); 348 } else { 349 zfs_error_aux(hdl, strerror(errno)); 350 } 351 return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, 352 dgettext(TEXT_DOMAIN, "cannot mount '%s'"), 353 zhp->zfs_name)); 354 } 355 356 /* add the mounted entry into our cache */ 357 libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, 358 mntopts); 359 return (0); 360 } 361 362 /* 363 * Unmount a single filesystem. 364 */ 365 static int 366 unmount_one(libzfs_handle_t *hdl, const char *mountpoint, int flags) 367 { 368 if (umount2(mountpoint, flags) != 0) { 369 zfs_error_aux(hdl, strerror(errno)); 370 return (zfs_error_fmt(hdl, EZFS_UMOUNTFAILED, 371 dgettext(TEXT_DOMAIN, "cannot unmount '%s'"), 372 mountpoint)); 373 } 374 375 return (0); 376 } 377 378 /* 379 * Unmount the given filesystem. 380 */ 381 int 382 zfs_unmount(zfs_handle_t *zhp, const char *mountpoint, int flags) 383 { 384 libzfs_handle_t *hdl = zhp->zfs_hdl; 385 struct mnttab entry; 386 char *mntpt = NULL; 387 388 /* check to see if we need to unmount the filesystem */ 389 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 390 libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)) { 391 /* 392 * mountpoint may have come from a call to 393 * getmnt/getmntany if it isn't NULL. If it is NULL, 394 * we know it comes from libzfs_mnttab_find which can 395 * then get freed later. We strdup it to play it safe. 396 */ 397 if (mountpoint == NULL) 398 mntpt = zfs_strdup(hdl, entry.mnt_mountp); 399 else 400 mntpt = zfs_strdup(hdl, mountpoint); 401 402 /* 403 * Unshare and unmount the filesystem 404 */ 405 if (zfs_unshare_proto(zhp, mntpt, share_all_proto) != 0) 406 return (-1); 407 408 if (unmount_one(hdl, mntpt, flags) != 0) { 409 free(mntpt); 410 (void) zfs_shareall(zhp); 411 return (-1); 412 } 413 libzfs_mnttab_remove(hdl, zhp->zfs_name); 414 free(mntpt); 415 } 416 417 return (0); 418 } 419 420 /* 421 * Unmount this filesystem and any children inheriting the mountpoint property. 422 * To do this, just act like we're changing the mountpoint property, but don't 423 * remount the filesystems afterwards. 424 */ 425 int 426 zfs_unmountall(zfs_handle_t *zhp, int flags) 427 { 428 prop_changelist_t *clp; 429 int ret; 430 431 clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 0, flags); 432 if (clp == NULL) 433 return (-1); 434 435 ret = changelist_prefix(clp); 436 changelist_free(clp); 437 438 return (ret); 439 } 440 441 boolean_t 442 zfs_is_shared(zfs_handle_t *zhp) 443 { 444 zfs_share_type_t rc = 0; 445 zfs_share_proto_t *curr_proto; 446 447 if (ZFS_IS_VOLUME(zhp)) 448 return (zfs_is_shared_iscsi(zhp)); 449 450 for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 451 curr_proto++) 452 rc |= zfs_is_shared_proto(zhp, NULL, *curr_proto); 453 454 return (rc ? B_TRUE : B_FALSE); 455 } 456 457 int 458 zfs_share(zfs_handle_t *zhp) 459 { 460 if (ZFS_IS_VOLUME(zhp)) 461 return (zfs_share_iscsi(zhp)); 462 463 return (zfs_share_proto(zhp, share_all_proto)); 464 } 465 466 int 467 zfs_unshare(zfs_handle_t *zhp) 468 { 469 if (ZFS_IS_VOLUME(zhp)) 470 return (zfs_unshare_iscsi(zhp)); 471 472 return (zfs_unshareall(zhp)); 473 } 474 475 /* 476 * Check to see if the filesystem is currently shared. 477 */ 478 zfs_share_type_t 479 zfs_is_shared_proto(zfs_handle_t *zhp, char **where, zfs_share_proto_t proto) 480 { 481 char *mountpoint; 482 zfs_share_type_t rc; 483 484 if (!zfs_is_mounted(zhp, &mountpoint)) 485 return (SHARED_NOT_SHARED); 486 487 if (rc = is_shared(zhp->zfs_hdl, mountpoint, proto)) { 488 if (where != NULL) 489 *where = mountpoint; 490 else 491 free(mountpoint); 492 return (rc); 493 } else { 494 free(mountpoint); 495 return (SHARED_NOT_SHARED); 496 } 497 } 498 499 boolean_t 500 zfs_is_shared_nfs(zfs_handle_t *zhp, char **where) 501 { 502 return (zfs_is_shared_proto(zhp, where, 503 PROTO_NFS) != SHARED_NOT_SHARED); 504 } 505 506 boolean_t 507 zfs_is_shared_smb(zfs_handle_t *zhp, char **where) 508 { 509 return (zfs_is_shared_proto(zhp, where, 510 PROTO_SMB) != SHARED_NOT_SHARED); 511 } 512 513 /* 514 * Make sure things will work if libshare isn't installed by using 515 * wrapper functions that check to see that the pointers to functions 516 * initialized in _zfs_init_libshare() are actually present. 517 */ 518 519 static sa_handle_t (*_sa_init)(int); 520 static void (*_sa_fini)(sa_handle_t); 521 static sa_share_t (*_sa_find_share)(sa_handle_t, char *); 522 static int (*_sa_enable_share)(sa_share_t, char *); 523 static int (*_sa_disable_share)(sa_share_t, char *); 524 static char *(*_sa_errorstr)(int); 525 static int (*_sa_parse_legacy_options)(sa_group_t, char *, char *); 526 static boolean_t (*_sa_needs_refresh)(sa_handle_t *); 527 static libzfs_handle_t *(*_sa_get_zfs_handle)(sa_handle_t); 528 static int (*_sa_zfs_process_share)(sa_handle_t, sa_group_t, sa_share_t, 529 char *, char *, zprop_source_t, char *, char *, char *); 530 static void (*_sa_update_sharetab_ts)(sa_handle_t); 531 532 /* 533 * _zfs_init_libshare() 534 * 535 * Find the libshare.so.1 entry points that we use here and save the 536 * values to be used later. This is triggered by the runtime loader. 537 * Make sure the correct ISA version is loaded. 538 */ 539 540 #pragma init(_zfs_init_libshare) 541 static void 542 _zfs_init_libshare(void) 543 { 544 void *libshare; 545 char path[MAXPATHLEN]; 546 char isa[MAXISALEN]; 547 548 #if defined(_LP64) 549 if (sysinfo(SI_ARCHITECTURE_64, isa, MAXISALEN) == -1) 550 isa[0] = '\0'; 551 #else 552 isa[0] = '\0'; 553 #endif 554 (void) snprintf(path, MAXPATHLEN, 555 "/usr/lib/%s/libshare.so.1", isa); 556 557 if ((libshare = dlopen(path, RTLD_LAZY | RTLD_GLOBAL)) != NULL) { 558 _sa_init = (sa_handle_t (*)(int))dlsym(libshare, "sa_init"); 559 _sa_fini = (void (*)(sa_handle_t))dlsym(libshare, "sa_fini"); 560 _sa_find_share = (sa_share_t (*)(sa_handle_t, char *)) 561 dlsym(libshare, "sa_find_share"); 562 _sa_enable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 563 "sa_enable_share"); 564 _sa_disable_share = (int (*)(sa_share_t, char *))dlsym(libshare, 565 "sa_disable_share"); 566 _sa_errorstr = (char *(*)(int))dlsym(libshare, "sa_errorstr"); 567 _sa_parse_legacy_options = (int (*)(sa_group_t, char *, char *)) 568 dlsym(libshare, "sa_parse_legacy_options"); 569 _sa_needs_refresh = (boolean_t (*)(sa_handle_t *)) 570 dlsym(libshare, "sa_needs_refresh"); 571 _sa_get_zfs_handle = (libzfs_handle_t *(*)(sa_handle_t)) 572 dlsym(libshare, "sa_get_zfs_handle"); 573 _sa_zfs_process_share = (int (*)(sa_handle_t, sa_group_t, 574 sa_share_t, char *, char *, zprop_source_t, char *, 575 char *, char *))dlsym(libshare, "sa_zfs_process_share"); 576 _sa_update_sharetab_ts = (void (*)(sa_handle_t)) 577 dlsym(libshare, "sa_update_sharetab_ts"); 578 if (_sa_init == NULL || _sa_fini == NULL || 579 _sa_find_share == NULL || _sa_enable_share == NULL || 580 _sa_disable_share == NULL || _sa_errorstr == NULL || 581 _sa_parse_legacy_options == NULL || 582 _sa_needs_refresh == NULL || _sa_get_zfs_handle == NULL || 583 _sa_zfs_process_share == NULL || 584 _sa_update_sharetab_ts == NULL) { 585 _sa_init = NULL; 586 _sa_fini = NULL; 587 _sa_disable_share = NULL; 588 _sa_enable_share = NULL; 589 _sa_errorstr = NULL; 590 _sa_parse_legacy_options = NULL; 591 (void) dlclose(libshare); 592 _sa_needs_refresh = NULL; 593 _sa_get_zfs_handle = NULL; 594 _sa_zfs_process_share = NULL; 595 _sa_update_sharetab_ts = NULL; 596 } 597 } 598 } 599 600 /* 601 * zfs_init_libshare(zhandle, service) 602 * 603 * Initialize the libshare API if it hasn't already been initialized. 604 * In all cases it returns 0 if it succeeded and an error if not. The 605 * service value is which part(s) of the API to initialize and is a 606 * direct map to the libshare sa_init(service) interface. 607 */ 608 int 609 zfs_init_libshare(libzfs_handle_t *zhandle, int service) 610 { 611 int ret = SA_OK; 612 613 if (_sa_init == NULL) 614 ret = SA_CONFIG_ERR; 615 616 if (ret == SA_OK && zhandle->libzfs_shareflags & ZFSSHARE_MISS) { 617 /* 618 * We had a cache miss. Most likely it is a new ZFS 619 * dataset that was just created. We want to make sure 620 * so check timestamps to see if a different process 621 * has updated any of the configuration. If there was 622 * some non-ZFS change, we need to re-initialize the 623 * internal cache. 624 */ 625 zhandle->libzfs_shareflags &= ~ZFSSHARE_MISS; 626 if (_sa_needs_refresh != NULL && 627 _sa_needs_refresh(zhandle->libzfs_sharehdl)) { 628 zfs_uninit_libshare(zhandle); 629 zhandle->libzfs_sharehdl = _sa_init(service); 630 } 631 } 632 633 if (ret == SA_OK && zhandle && zhandle->libzfs_sharehdl == NULL) 634 zhandle->libzfs_sharehdl = _sa_init(service); 635 636 if (ret == SA_OK && zhandle->libzfs_sharehdl == NULL) 637 ret = SA_NO_MEMORY; 638 639 return (ret); 640 } 641 642 /* 643 * zfs_uninit_libshare(zhandle) 644 * 645 * Uninitialize the libshare API if it hasn't already been 646 * uninitialized. It is OK to call multiple times. 647 */ 648 void 649 zfs_uninit_libshare(libzfs_handle_t *zhandle) 650 { 651 if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) { 652 if (_sa_fini != NULL) 653 _sa_fini(zhandle->libzfs_sharehdl); 654 zhandle->libzfs_sharehdl = NULL; 655 } 656 } 657 658 /* 659 * zfs_parse_options(options, proto) 660 * 661 * Call the legacy parse interface to get the protocol specific 662 * options using the NULL arg to indicate that this is a "parse" only. 663 */ 664 int 665 zfs_parse_options(char *options, zfs_share_proto_t proto) 666 { 667 if (_sa_parse_legacy_options != NULL) { 668 return (_sa_parse_legacy_options(NULL, options, 669 proto_table[proto].p_name)); 670 } 671 return (SA_CONFIG_ERR); 672 } 673 674 /* 675 * zfs_sa_find_share(handle, path) 676 * 677 * wrapper around sa_find_share to find a share path in the 678 * configuration. 679 */ 680 static sa_share_t 681 zfs_sa_find_share(sa_handle_t handle, char *path) 682 { 683 if (_sa_find_share != NULL) 684 return (_sa_find_share(handle, path)); 685 return (NULL); 686 } 687 688 /* 689 * zfs_sa_enable_share(share, proto) 690 * 691 * Wrapper for sa_enable_share which enables a share for a specified 692 * protocol. 693 */ 694 static int 695 zfs_sa_enable_share(sa_share_t share, char *proto) 696 { 697 if (_sa_enable_share != NULL) 698 return (_sa_enable_share(share, proto)); 699 return (SA_CONFIG_ERR); 700 } 701 702 /* 703 * zfs_sa_disable_share(share, proto) 704 * 705 * Wrapper for sa_enable_share which disables a share for a specified 706 * protocol. 707 */ 708 static int 709 zfs_sa_disable_share(sa_share_t share, char *proto) 710 { 711 if (_sa_disable_share != NULL) 712 return (_sa_disable_share(share, proto)); 713 return (SA_CONFIG_ERR); 714 } 715 716 /* 717 * Share the given filesystem according to the options in the specified 718 * protocol specific properties (sharenfs, sharesmb). We rely 719 * on "libshare" to the dirty work for us. 720 */ 721 static int 722 zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 723 { 724 char mountpoint[ZFS_MAXPROPLEN]; 725 char shareopts[ZFS_MAXPROPLEN]; 726 char sourcestr[ZFS_MAXPROPLEN]; 727 libzfs_handle_t *hdl = zhp->zfs_hdl; 728 sa_share_t share; 729 zfs_share_proto_t *curr_proto; 730 zprop_source_t sourcetype; 731 int ret; 732 733 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) 734 return (0); 735 736 if ((ret = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { 737 (void) zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 738 dgettext(TEXT_DOMAIN, "cannot share '%s': %s"), 739 zfs_get_name(zhp), _sa_errorstr != NULL ? 740 _sa_errorstr(ret) : ""); 741 return (-1); 742 } 743 744 for (curr_proto = proto; *curr_proto != PROTO_END; curr_proto++) { 745 /* 746 * Return success if there are no share options. 747 */ 748 if (zfs_prop_get(zhp, proto_table[*curr_proto].p_prop, 749 shareopts, sizeof (shareopts), &sourcetype, sourcestr, 750 ZFS_MAXPROPLEN, B_FALSE) != 0 || 751 strcmp(shareopts, "off") == 0) 752 continue; 753 754 /* 755 * If the 'zoned' property is set, then zfs_is_mountable() 756 * will have already bailed out if we are in the global zone. 757 * But local zones cannot be NFS servers, so we ignore it for 758 * local zones as well. 759 */ 760 if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) 761 continue; 762 763 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint); 764 if (share == NULL) { 765 /* 766 * This may be a new file system that was just 767 * created so isn't in the internal cache 768 * (second time through). Rather than 769 * reloading the entire configuration, we can 770 * assume ZFS has done the checking and it is 771 * safe to add this to the internal 772 * configuration. 773 */ 774 if (_sa_zfs_process_share(hdl->libzfs_sharehdl, 775 NULL, NULL, mountpoint, 776 proto_table[*curr_proto].p_name, sourcetype, 777 shareopts, sourcestr, zhp->zfs_name) != SA_OK) { 778 (void) zfs_error_fmt(hdl, 779 proto_table[*curr_proto].p_share_err, 780 dgettext(TEXT_DOMAIN, "cannot share '%s'"), 781 zfs_get_name(zhp)); 782 return (-1); 783 } 784 hdl->libzfs_shareflags |= ZFSSHARE_MISS; 785 share = zfs_sa_find_share(hdl->libzfs_sharehdl, 786 mountpoint); 787 } 788 if (share != NULL) { 789 int err; 790 err = zfs_sa_enable_share(share, 791 proto_table[*curr_proto].p_name); 792 if (err != SA_OK) { 793 (void) zfs_error_fmt(hdl, 794 proto_table[*curr_proto].p_share_err, 795 dgettext(TEXT_DOMAIN, "cannot share '%s'"), 796 zfs_get_name(zhp)); 797 return (-1); 798 } 799 } else { 800 (void) zfs_error_fmt(hdl, 801 proto_table[*curr_proto].p_share_err, 802 dgettext(TEXT_DOMAIN, "cannot share '%s'"), 803 zfs_get_name(zhp)); 804 return (-1); 805 } 806 807 } 808 return (0); 809 } 810 811 812 int 813 zfs_share_nfs(zfs_handle_t *zhp) 814 { 815 return (zfs_share_proto(zhp, nfs_only)); 816 } 817 818 int 819 zfs_share_smb(zfs_handle_t *zhp) 820 { 821 return (zfs_share_proto(zhp, smb_only)); 822 } 823 824 int 825 zfs_shareall(zfs_handle_t *zhp) 826 { 827 return (zfs_share_proto(zhp, share_all_proto)); 828 } 829 830 /* 831 * Unshare a filesystem by mountpoint. 832 */ 833 static int 834 unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint, 835 zfs_share_proto_t proto) 836 { 837 sa_share_t share; 838 int err; 839 char *mntpt; 840 /* 841 * Mountpoint could get trashed if libshare calls getmntany 842 * which it does during API initialization, so strdup the 843 * value. 844 */ 845 mntpt = zfs_strdup(hdl, mountpoint); 846 847 /* make sure libshare initialized */ 848 if ((err = zfs_init_libshare(hdl, SA_INIT_SHARE_API)) != SA_OK) { 849 free(mntpt); /* don't need the copy anymore */ 850 return (zfs_error_fmt(hdl, EZFS_SHARENFSFAILED, 851 dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 852 name, _sa_errorstr(err))); 853 } 854 855 share = zfs_sa_find_share(hdl->libzfs_sharehdl, mntpt); 856 free(mntpt); /* don't need the copy anymore */ 857 858 if (share != NULL) { 859 err = zfs_sa_disable_share(share, proto_table[proto].p_name); 860 if (err != SA_OK) { 861 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 862 dgettext(TEXT_DOMAIN, "cannot unshare '%s': %s"), 863 name, _sa_errorstr(err))); 864 } 865 } else { 866 return (zfs_error_fmt(hdl, EZFS_UNSHARENFSFAILED, 867 dgettext(TEXT_DOMAIN, "cannot unshare '%s': not found"), 868 name)); 869 } 870 return (0); 871 } 872 873 /* 874 * Unshare the given filesystem. 875 */ 876 int 877 zfs_unshare_proto(zfs_handle_t *zhp, const char *mountpoint, 878 zfs_share_proto_t *proto) 879 { 880 libzfs_handle_t *hdl = zhp->zfs_hdl; 881 struct mnttab entry; 882 char *mntpt = NULL; 883 884 /* check to see if need to unmount the filesystem */ 885 rewind(zhp->zfs_hdl->libzfs_mnttab); 886 if (mountpoint != NULL) 887 mountpoint = mntpt = zfs_strdup(hdl, mountpoint); 888 889 if (mountpoint != NULL || ((zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) && 890 libzfs_mnttab_find(hdl, zfs_get_name(zhp), &entry) == 0)) { 891 zfs_share_proto_t *curr_proto; 892 893 if (mountpoint == NULL) 894 mntpt = zfs_strdup(zhp->zfs_hdl, entry.mnt_mountp); 895 896 for (curr_proto = proto; *curr_proto != PROTO_END; 897 curr_proto++) { 898 899 if (is_shared(hdl, mntpt, *curr_proto) && 900 unshare_one(hdl, zhp->zfs_name, 901 mntpt, *curr_proto) != 0) { 902 if (mntpt != NULL) 903 free(mntpt); 904 return (-1); 905 } 906 } 907 } 908 if (mntpt != NULL) 909 free(mntpt); 910 911 return (0); 912 } 913 914 int 915 zfs_unshare_nfs(zfs_handle_t *zhp, const char *mountpoint) 916 { 917 return (zfs_unshare_proto(zhp, mountpoint, nfs_only)); 918 } 919 920 int 921 zfs_unshare_smb(zfs_handle_t *zhp, const char *mountpoint) 922 { 923 return (zfs_unshare_proto(zhp, mountpoint, smb_only)); 924 } 925 926 /* 927 * Same as zfs_unmountall(), but for NFS and SMB unshares. 928 */ 929 int 930 zfs_unshareall_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto) 931 { 932 prop_changelist_t *clp; 933 int ret; 934 935 clp = changelist_gather(zhp, ZFS_PROP_SHARENFS, 0, 0); 936 if (clp == NULL) 937 return (-1); 938 939 ret = changelist_unshare(clp, proto); 940 changelist_free(clp); 941 942 return (ret); 943 } 944 945 int 946 zfs_unshareall_nfs(zfs_handle_t *zhp) 947 { 948 return (zfs_unshareall_proto(zhp, nfs_only)); 949 } 950 951 int 952 zfs_unshareall_smb(zfs_handle_t *zhp) 953 { 954 return (zfs_unshareall_proto(zhp, smb_only)); 955 } 956 957 int 958 zfs_unshareall(zfs_handle_t *zhp) 959 { 960 return (zfs_unshareall_proto(zhp, share_all_proto)); 961 } 962 963 int 964 zfs_unshareall_bypath(zfs_handle_t *zhp, const char *mountpoint) 965 { 966 return (zfs_unshare_proto(zhp, mountpoint, share_all_proto)); 967 } 968 969 /* 970 * Remove the mountpoint associated with the current dataset, if necessary. 971 * We only remove the underlying directory if: 972 * 973 * - The mountpoint is not 'none' or 'legacy' 974 * - The mountpoint is non-empty 975 * - The mountpoint is the default or inherited 976 * - The 'zoned' property is set, or we're in a local zone 977 * 978 * Any other directories we leave alone. 979 */ 980 void 981 remove_mountpoint(zfs_handle_t *zhp) 982 { 983 char mountpoint[ZFS_MAXPROPLEN]; 984 zprop_source_t source; 985 986 if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), 987 &source)) 988 return; 989 990 if (source == ZPROP_SRC_DEFAULT || 991 source == ZPROP_SRC_INHERITED) { 992 /* 993 * Try to remove the directory, silently ignoring any errors. 994 * The filesystem may have since been removed or moved around, 995 * and this error isn't really useful to the administrator in 996 * any way. 997 */ 998 (void) rmdir(mountpoint); 999 } 1000 } 1001 1002 boolean_t 1003 zfs_is_shared_iscsi(zfs_handle_t *zhp) 1004 { 1005 1006 /* 1007 * If iscsi deamon isn't running then we aren't shared 1008 */ 1009 if (iscsitgt_svc_online && iscsitgt_svc_online() == 1) 1010 return (B_FALSE); 1011 else 1012 return (iscsitgt_zfs_is_shared != NULL && 1013 iscsitgt_zfs_is_shared(zhp->zfs_name) != 0); 1014 } 1015 1016 int 1017 zfs_share_iscsi(zfs_handle_t *zhp) 1018 { 1019 char shareopts[ZFS_MAXPROPLEN]; 1020 const char *dataset = zhp->zfs_name; 1021 libzfs_handle_t *hdl = zhp->zfs_hdl; 1022 1023 /* 1024 * Return success if there are no share options. 1025 */ 1026 if (zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts, 1027 sizeof (shareopts), NULL, NULL, 0, B_FALSE) != 0 || 1028 strcmp(shareopts, "off") == 0) 1029 return (0); 1030 1031 if (iscsitgt_zfs_share == NULL || iscsitgt_zfs_share(dataset) != 0) { 1032 int error = EZFS_SHAREISCSIFAILED; 1033 1034 /* 1035 * If service isn't availabele and EPERM was 1036 * returned then use special error. 1037 */ 1038 if (iscsitgt_svc_online && errno == EPERM && 1039 (iscsitgt_svc_online() != 0)) 1040 error = EZFS_ISCSISVCUNAVAIL; 1041 1042 return (zfs_error_fmt(hdl, error, 1043 dgettext(TEXT_DOMAIN, "cannot share '%s'"), dataset)); 1044 } 1045 1046 return (0); 1047 } 1048 1049 int 1050 zfs_unshare_iscsi(zfs_handle_t *zhp) 1051 { 1052 const char *dataset = zfs_get_name(zhp); 1053 libzfs_handle_t *hdl = zhp->zfs_hdl; 1054 1055 /* 1056 * Return if the volume is not shared 1057 */ 1058 if (zfs_is_shared_iscsi(zhp) != SHARED_ISCSI) 1059 return (0); 1060 1061 /* 1062 * If this fails with ENODEV it indicates that zvol wasn't shared so 1063 * we should return success in that case. 1064 */ 1065 if (iscsitgt_zfs_unshare == NULL || 1066 (iscsitgt_zfs_unshare(dataset) != 0 && errno != ENODEV)) { 1067 if (errno == EPERM) 1068 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1069 "Insufficient privileges to unshare iscsi")); 1070 return (zfs_error_fmt(hdl, EZFS_UNSHAREISCSIFAILED, 1071 dgettext(TEXT_DOMAIN, "cannot unshare '%s'"), dataset)); 1072 } 1073 1074 return (0); 1075 } 1076 1077 typedef struct mount_cbdata { 1078 zfs_handle_t **cb_datasets; 1079 int cb_used; 1080 int cb_alloc; 1081 } mount_cbdata_t; 1082 1083 static int 1084 mount_cb(zfs_handle_t *zhp, void *data) 1085 { 1086 mount_cbdata_t *cbp = data; 1087 1088 if (!(zfs_get_type(zhp) & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) { 1089 zfs_close(zhp); 1090 return (0); 1091 } 1092 1093 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_NOAUTO) { 1094 zfs_close(zhp); 1095 return (0); 1096 } 1097 1098 if (cbp->cb_alloc == cbp->cb_used) { 1099 void *ptr; 1100 1101 if ((ptr = zfs_realloc(zhp->zfs_hdl, 1102 cbp->cb_datasets, cbp->cb_alloc * sizeof (void *), 1103 cbp->cb_alloc * 2 * sizeof (void *))) == NULL) 1104 return (-1); 1105 cbp->cb_datasets = ptr; 1106 1107 cbp->cb_alloc *= 2; 1108 } 1109 1110 cbp->cb_datasets[cbp->cb_used++] = zhp; 1111 1112 return (zfs_iter_filesystems(zhp, mount_cb, cbp)); 1113 } 1114 1115 static int 1116 dataset_cmp(const void *a, const void *b) 1117 { 1118 zfs_handle_t **za = (zfs_handle_t **)a; 1119 zfs_handle_t **zb = (zfs_handle_t **)b; 1120 char mounta[MAXPATHLEN]; 1121 char mountb[MAXPATHLEN]; 1122 boolean_t gota, gotb; 1123 1124 if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) 1125 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, 1126 sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 1127 if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) 1128 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, 1129 sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 1130 1131 if (gota && gotb) 1132 return (strcmp(mounta, mountb)); 1133 1134 if (gota) 1135 return (-1); 1136 if (gotb) 1137 return (1); 1138 1139 return (strcmp(zfs_get_name(a), zfs_get_name(b))); 1140 } 1141 1142 /* 1143 * Mount and share all datasets within the given pool. This assumes that no 1144 * datasets within the pool are currently mounted. Because users can create 1145 * complicated nested hierarchies of mountpoints, we first gather all the 1146 * datasets and mountpoints within the pool, and sort them by mountpoint. Once 1147 * we have the list of all filesystems, we iterate over them in order and mount 1148 * and/or share each one. 1149 */ 1150 #pragma weak zpool_mount_datasets = zpool_enable_datasets 1151 int 1152 zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags) 1153 { 1154 mount_cbdata_t cb = { 0 }; 1155 libzfs_handle_t *hdl = zhp->zpool_hdl; 1156 zfs_handle_t *zfsp; 1157 int i, ret = -1; 1158 int *good; 1159 1160 /* 1161 * Gather all non-snap datasets within the pool. 1162 */ 1163 if ((cb.cb_datasets = zfs_alloc(hdl, 4 * sizeof (void *))) == NULL) 1164 return (-1); 1165 cb.cb_alloc = 4; 1166 1167 if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL) 1168 goto out; 1169 1170 cb.cb_datasets[0] = zfsp; 1171 cb.cb_used = 1; 1172 1173 if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0) 1174 goto out; 1175 1176 /* 1177 * Sort the datasets by mountpoint. 1178 */ 1179 qsort(cb.cb_datasets, cb.cb_used, sizeof (void *), dataset_cmp); 1180 1181 /* 1182 * And mount all the datasets, keeping track of which ones 1183 * succeeded or failed. 1184 */ 1185 if ((good = zfs_alloc(zhp->zpool_hdl, 1186 cb.cb_used * sizeof (int))) == NULL) 1187 goto out; 1188 1189 ret = 0; 1190 for (i = 0; i < cb.cb_used; i++) { 1191 if (zfs_mount(cb.cb_datasets[i], mntopts, flags) != 0) 1192 ret = -1; 1193 else 1194 good[i] = 1; 1195 } 1196 1197 /* 1198 * Then share all the ones that need to be shared. This needs 1199 * to be a separate pass in order to avoid excessive reloading 1200 * of the configuration. Good should never be NULL since 1201 * zfs_alloc is supposed to exit if memory isn't available. 1202 */ 1203 for (i = 0; i < cb.cb_used; i++) { 1204 if (good[i] && zfs_share(cb.cb_datasets[i]) != 0) 1205 ret = -1; 1206 } 1207 1208 free(good); 1209 1210 out: 1211 for (i = 0; i < cb.cb_used; i++) 1212 zfs_close(cb.cb_datasets[i]); 1213 free(cb.cb_datasets); 1214 1215 return (ret); 1216 } 1217 1218 1219 static int 1220 zvol_cb(const char *dataset, void *data) 1221 { 1222 libzfs_handle_t *hdl = data; 1223 zfs_handle_t *zhp; 1224 1225 /* 1226 * Ignore snapshots and ignore failures from non-existant datasets. 1227 */ 1228 if (strchr(dataset, '@') != NULL || 1229 (zhp = zfs_open(hdl, dataset, ZFS_TYPE_VOLUME)) == NULL) 1230 return (0); 1231 1232 if (zfs_unshare_iscsi(zhp) != 0) 1233 return (-1); 1234 1235 zfs_close(zhp); 1236 1237 return (0); 1238 } 1239 1240 static int 1241 mountpoint_compare(const void *a, const void *b) 1242 { 1243 const char *mounta = *((char **)a); 1244 const char *mountb = *((char **)b); 1245 1246 return (strcmp(mountb, mounta)); 1247 } 1248 1249 /* 1250 * Unshare and unmount all datasets within the given pool. We don't want to 1251 * rely on traversing the DSL to discover the filesystems within the pool, 1252 * because this may be expensive (if not all of them are mounted), and can fail 1253 * arbitrarily (on I/O error, for example). Instead, we walk /etc/mnttab and 1254 * gather all the filesystems that are currently mounted. 1255 */ 1256 #pragma weak zpool_unmount_datasets = zpool_disable_datasets 1257 int 1258 zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force) 1259 { 1260 int used, alloc; 1261 struct mnttab entry; 1262 size_t namelen; 1263 char **mountpoints = NULL; 1264 zfs_handle_t **datasets = NULL; 1265 libzfs_handle_t *hdl = zhp->zpool_hdl; 1266 int i; 1267 int ret = -1; 1268 int flags = (force ? MS_FORCE : 0); 1269 1270 /* 1271 * First unshare all zvols. 1272 */ 1273 if (zpool_iter_zvol(zhp, zvol_cb, hdl) != 0) 1274 return (-1); 1275 1276 namelen = strlen(zhp->zpool_name); 1277 1278 rewind(hdl->libzfs_mnttab); 1279 used = alloc = 0; 1280 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 1281 /* 1282 * Ignore non-ZFS entries. 1283 */ 1284 if (entry.mnt_fstype == NULL || 1285 strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 1286 continue; 1287 1288 /* 1289 * Ignore filesystems not within this pool. 1290 */ 1291 if (entry.mnt_mountp == NULL || 1292 strncmp(entry.mnt_special, zhp->zpool_name, namelen) != 0 || 1293 (entry.mnt_special[namelen] != '/' && 1294 entry.mnt_special[namelen] != '\0')) 1295 continue; 1296 1297 /* 1298 * At this point we've found a filesystem within our pool. Add 1299 * it to our growing list. 1300 */ 1301 if (used == alloc) { 1302 if (alloc == 0) { 1303 if ((mountpoints = zfs_alloc(hdl, 1304 8 * sizeof (void *))) == NULL) 1305 goto out; 1306 1307 if ((datasets = zfs_alloc(hdl, 1308 8 * sizeof (void *))) == NULL) 1309 goto out; 1310 1311 alloc = 8; 1312 } else { 1313 void *ptr; 1314 1315 if ((ptr = zfs_realloc(hdl, mountpoints, 1316 alloc * sizeof (void *), 1317 alloc * 2 * sizeof (void *))) == NULL) 1318 goto out; 1319 mountpoints = ptr; 1320 1321 if ((ptr = zfs_realloc(hdl, datasets, 1322 alloc * sizeof (void *), 1323 alloc * 2 * sizeof (void *))) == NULL) 1324 goto out; 1325 datasets = ptr; 1326 1327 alloc *= 2; 1328 } 1329 } 1330 1331 if ((mountpoints[used] = zfs_strdup(hdl, 1332 entry.mnt_mountp)) == NULL) 1333 goto out; 1334 1335 /* 1336 * This is allowed to fail, in case there is some I/O error. It 1337 * is only used to determine if we need to remove the underlying 1338 * mountpoint, so failure is not fatal. 1339 */ 1340 datasets[used] = make_dataset_handle(hdl, entry.mnt_special); 1341 1342 used++; 1343 } 1344 1345 /* 1346 * At this point, we have the entire list of filesystems, so sort it by 1347 * mountpoint. 1348 */ 1349 qsort(mountpoints, used, sizeof (char *), mountpoint_compare); 1350 1351 /* 1352 * Walk through and first unshare everything. 1353 */ 1354 for (i = 0; i < used; i++) { 1355 zfs_share_proto_t *curr_proto; 1356 for (curr_proto = share_all_proto; *curr_proto != PROTO_END; 1357 curr_proto++) { 1358 if (is_shared(hdl, mountpoints[i], *curr_proto) && 1359 unshare_one(hdl, mountpoints[i], 1360 mountpoints[i], *curr_proto) != 0) 1361 goto out; 1362 } 1363 } 1364 1365 /* 1366 * Now unmount everything, removing the underlying directories as 1367 * appropriate. 1368 */ 1369 for (i = 0; i < used; i++) { 1370 if (unmount_one(hdl, mountpoints[i], flags) != 0) 1371 goto out; 1372 } 1373 1374 for (i = 0; i < used; i++) { 1375 if (datasets[i]) 1376 remove_mountpoint(datasets[i]); 1377 } 1378 1379 ret = 0; 1380 out: 1381 for (i = 0; i < used; i++) { 1382 if (datasets[i]) 1383 zfs_close(datasets[i]); 1384 free(mountpoints[i]); 1385 } 1386 free(datasets); 1387 free(mountpoints); 1388 1389 return (ret); 1390 } 1391