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 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/param.h> 28 #include <sys/errno.h> 29 #include <sys/uio.h> 30 #include <sys/buf.h> 31 #include <sys/modctl.h> 32 #include <sys/open.h> 33 #include <sys/file.h> 34 #include <sys/kmem.h> 35 #include <sys/conf.h> 36 #include <sys/cmn_err.h> 37 #include <sys/stat.h> 38 #include <sys/zfs_ioctl.h> 39 #include <sys/zfs_vfsops.h> 40 #include <sys/zfs_znode.h> 41 #include <sys/zap.h> 42 #include <sys/spa.h> 43 #include <sys/spa_impl.h> 44 #include <sys/vdev.h> 45 #include <sys/priv_impl.h> 46 #include <sys/dmu.h> 47 #include <sys/dsl_dir.h> 48 #include <sys/dsl_dataset.h> 49 #include <sys/dsl_prop.h> 50 #include <sys/dsl_deleg.h> 51 #include <sys/dmu_objset.h> 52 #include <sys/ddi.h> 53 #include <sys/sunddi.h> 54 #include <sys/sunldi.h> 55 #include <sys/policy.h> 56 #include <sys/zone.h> 57 #include <sys/nvpair.h> 58 #include <sys/pathname.h> 59 #include <sys/mount.h> 60 #include <sys/sdt.h> 61 #include <sys/fs/zfs.h> 62 #include <sys/zfs_ctldir.h> 63 #include <sys/zfs_dir.h> 64 #include <sys/zvol.h> 65 #include <sharefs/share.h> 66 #include <sys/dmu_objset.h> 67 68 #include "zfs_namecheck.h" 69 #include "zfs_prop.h" 70 #include "zfs_deleg.h" 71 72 extern struct modlfs zfs_modlfs; 73 74 extern void zfs_init(void); 75 extern void zfs_fini(void); 76 77 ldi_ident_t zfs_li = NULL; 78 dev_info_t *zfs_dip; 79 80 typedef int zfs_ioc_func_t(zfs_cmd_t *); 81 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, cred_t *); 82 83 typedef enum { 84 NO_NAME, 85 POOL_NAME, 86 DATASET_NAME 87 } zfs_ioc_namecheck_t; 88 89 typedef struct zfs_ioc_vec { 90 zfs_ioc_func_t *zvec_func; 91 zfs_secpolicy_func_t *zvec_secpolicy; 92 zfs_ioc_namecheck_t zvec_namecheck; 93 boolean_t zvec_his_log; 94 boolean_t zvec_pool_check; 95 } zfs_ioc_vec_t; 96 97 /* This array is indexed by zfs_userquota_prop_t */ 98 static const char *userquota_perms[] = { 99 ZFS_DELEG_PERM_USERUSED, 100 ZFS_DELEG_PERM_USERQUOTA, 101 ZFS_DELEG_PERM_GROUPUSED, 102 ZFS_DELEG_PERM_GROUPQUOTA, 103 }; 104 105 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc); 106 static int zfs_check_settable(const char *name, nvpair_t *property, 107 cred_t *cr); 108 static int zfs_check_clearable(char *dataset, nvlist_t *props, 109 nvlist_t **errors); 110 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *, 111 boolean_t *); 112 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t **); 113 114 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ 115 void 116 __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 117 { 118 const char *newfile; 119 char buf[256]; 120 va_list adx; 121 122 /* 123 * Get rid of annoying "../common/" prefix to filename. 124 */ 125 newfile = strrchr(file, '/'); 126 if (newfile != NULL) { 127 newfile = newfile + 1; /* Get rid of leading / */ 128 } else { 129 newfile = file; 130 } 131 132 va_start(adx, fmt); 133 (void) vsnprintf(buf, sizeof (buf), fmt, adx); 134 va_end(adx); 135 136 /* 137 * To get this data, use the zfs-dprintf probe as so: 138 * dtrace -q -n 'zfs-dprintf \ 139 * /stringof(arg0) == "dbuf.c"/ \ 140 * {printf("%s: %s", stringof(arg1), stringof(arg3))}' 141 * arg0 = file name 142 * arg1 = function name 143 * arg2 = line number 144 * arg3 = message 145 */ 146 DTRACE_PROBE4(zfs__dprintf, 147 char *, newfile, char *, func, int, line, char *, buf); 148 } 149 150 static void 151 history_str_free(char *buf) 152 { 153 kmem_free(buf, HIS_MAX_RECORD_LEN); 154 } 155 156 static char * 157 history_str_get(zfs_cmd_t *zc) 158 { 159 char *buf; 160 161 if (zc->zc_history == NULL) 162 return (NULL); 163 164 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); 165 if (copyinstr((void *)(uintptr_t)zc->zc_history, 166 buf, HIS_MAX_RECORD_LEN, NULL) != 0) { 167 history_str_free(buf); 168 return (NULL); 169 } 170 171 buf[HIS_MAX_RECORD_LEN -1] = '\0'; 172 173 return (buf); 174 } 175 176 /* 177 * Check to see if the named dataset is currently defined as bootable 178 */ 179 static boolean_t 180 zfs_is_bootfs(const char *name) 181 { 182 objset_t *os; 183 184 if (dmu_objset_hold(name, FTAG, &os) == 0) { 185 boolean_t ret; 186 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os))); 187 dmu_objset_rele(os, FTAG); 188 return (ret); 189 } 190 return (B_FALSE); 191 } 192 193 /* 194 * zfs_earlier_version 195 * 196 * Return non-zero if the spa version is less than requested version. 197 */ 198 static int 199 zfs_earlier_version(const char *name, int version) 200 { 201 spa_t *spa; 202 203 if (spa_open(name, &spa, FTAG) == 0) { 204 if (spa_version(spa) < version) { 205 spa_close(spa, FTAG); 206 return (1); 207 } 208 spa_close(spa, FTAG); 209 } 210 return (0); 211 } 212 213 /* 214 * zpl_earlier_version 215 * 216 * Return TRUE if the ZPL version is less than requested version. 217 */ 218 static boolean_t 219 zpl_earlier_version(const char *name, int version) 220 { 221 objset_t *os; 222 boolean_t rc = B_TRUE; 223 224 if (dmu_objset_hold(name, FTAG, &os) == 0) { 225 uint64_t zplversion; 226 227 if (dmu_objset_type(os) != DMU_OST_ZFS) { 228 dmu_objset_rele(os, FTAG); 229 return (B_TRUE); 230 } 231 /* XXX reading from non-owned objset */ 232 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0) 233 rc = zplversion < version; 234 dmu_objset_rele(os, FTAG); 235 } 236 return (rc); 237 } 238 239 static void 240 zfs_log_history(zfs_cmd_t *zc) 241 { 242 spa_t *spa; 243 char *buf; 244 245 if ((buf = history_str_get(zc)) == NULL) 246 return; 247 248 if (spa_open(zc->zc_name, &spa, FTAG) == 0) { 249 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) 250 (void) spa_history_log(spa, buf, LOG_CMD_NORMAL); 251 spa_close(spa, FTAG); 252 } 253 history_str_free(buf); 254 } 255 256 /* 257 * Policy for top-level read operations (list pools). Requires no privileges, 258 * and can be used in the local zone, as there is no associated dataset. 259 */ 260 /* ARGSUSED */ 261 static int 262 zfs_secpolicy_none(zfs_cmd_t *zc, cred_t *cr) 263 { 264 return (0); 265 } 266 267 /* 268 * Policy for dataset read operations (list children, get statistics). Requires 269 * no privileges, but must be visible in the local zone. 270 */ 271 /* ARGSUSED */ 272 static int 273 zfs_secpolicy_read(zfs_cmd_t *zc, cred_t *cr) 274 { 275 if (INGLOBALZONE(curproc) || 276 zone_dataset_visible(zc->zc_name, NULL)) 277 return (0); 278 279 return (ENOENT); 280 } 281 282 static int 283 zfs_dozonecheck(const char *dataset, cred_t *cr) 284 { 285 uint64_t zoned; 286 int writable = 1; 287 288 /* 289 * The dataset must be visible by this zone -- check this first 290 * so they don't see EPERM on something they shouldn't know about. 291 */ 292 if (!INGLOBALZONE(curproc) && 293 !zone_dataset_visible(dataset, &writable)) 294 return (ENOENT); 295 296 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL)) 297 return (ENOENT); 298 299 if (INGLOBALZONE(curproc)) { 300 /* 301 * If the fs is zoned, only root can access it from the 302 * global zone. 303 */ 304 if (secpolicy_zfs(cr) && zoned) 305 return (EPERM); 306 } else { 307 /* 308 * If we are in a local zone, the 'zoned' property must be set. 309 */ 310 if (!zoned) 311 return (EPERM); 312 313 /* must be writable by this zone */ 314 if (!writable) 315 return (EPERM); 316 } 317 return (0); 318 } 319 320 int 321 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) 322 { 323 int error; 324 325 error = zfs_dozonecheck(name, cr); 326 if (error == 0) { 327 error = secpolicy_zfs(cr); 328 if (error) 329 error = dsl_deleg_access(name, perm, cr); 330 } 331 return (error); 332 } 333 334 /* 335 * Policy for setting the security label property. 336 * 337 * Returns 0 for success, non-zero for access and other errors. 338 */ 339 static int 340 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr) 341 { 342 char ds_hexsl[MAXNAMELEN]; 343 bslabel_t ds_sl, new_sl; 344 boolean_t new_default = FALSE; 345 uint64_t zoned; 346 int needed_priv = -1; 347 int error; 348 349 /* First get the existing dataset label. */ 350 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 351 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 352 if (error) 353 return (EPERM); 354 355 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 356 new_default = TRUE; 357 358 /* The label must be translatable */ 359 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0)) 360 return (EINVAL); 361 362 /* 363 * In a non-global zone, disallow attempts to set a label that 364 * doesn't match that of the zone; otherwise no other checks 365 * are needed. 366 */ 367 if (!INGLOBALZONE(curproc)) { 368 if (new_default || !blequal(&new_sl, CR_SL(CRED()))) 369 return (EPERM); 370 return (0); 371 } 372 373 /* 374 * For global-zone datasets (i.e., those whose zoned property is 375 * "off", verify that the specified new label is valid for the 376 * global zone. 377 */ 378 if (dsl_prop_get_integer(name, 379 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 380 return (EPERM); 381 if (!zoned) { 382 if (zfs_check_global_label(name, strval) != 0) 383 return (EPERM); 384 } 385 386 /* 387 * If the existing dataset label is nondefault, check if the 388 * dataset is mounted (label cannot be changed while mounted). 389 * Get the zfsvfs; if there isn't one, then the dataset isn't 390 * mounted (or isn't a dataset, doesn't exist, ...). 391 */ 392 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) { 393 objset_t *os; 394 static char *setsl_tag = "setsl_tag"; 395 396 /* 397 * Try to own the dataset; abort if there is any error, 398 * (e.g., already mounted, in use, or other error). 399 */ 400 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE, 401 setsl_tag, &os); 402 if (error) 403 return (EPERM); 404 405 dmu_objset_disown(os, setsl_tag); 406 407 if (new_default) { 408 needed_priv = PRIV_FILE_DOWNGRADE_SL; 409 goto out_check; 410 } 411 412 if (hexstr_to_label(strval, &new_sl) != 0) 413 return (EPERM); 414 415 if (blstrictdom(&ds_sl, &new_sl)) 416 needed_priv = PRIV_FILE_DOWNGRADE_SL; 417 else if (blstrictdom(&new_sl, &ds_sl)) 418 needed_priv = PRIV_FILE_UPGRADE_SL; 419 } else { 420 /* dataset currently has a default label */ 421 if (!new_default) 422 needed_priv = PRIV_FILE_UPGRADE_SL; 423 } 424 425 out_check: 426 if (needed_priv != -1) 427 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL)); 428 return (0); 429 } 430 431 static int 432 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval, 433 cred_t *cr) 434 { 435 char *strval; 436 437 /* 438 * Check permissions for special properties. 439 */ 440 switch (prop) { 441 case ZFS_PROP_ZONED: 442 /* 443 * Disallow setting of 'zoned' from within a local zone. 444 */ 445 if (!INGLOBALZONE(curproc)) 446 return (EPERM); 447 break; 448 449 case ZFS_PROP_QUOTA: 450 if (!INGLOBALZONE(curproc)) { 451 uint64_t zoned; 452 char setpoint[MAXNAMELEN]; 453 /* 454 * Unprivileged users are allowed to modify the 455 * quota on things *under* (ie. contained by) 456 * the thing they own. 457 */ 458 if (dsl_prop_get_integer(dsname, "zoned", &zoned, 459 setpoint)) 460 return (EPERM); 461 if (!zoned || strlen(dsname) <= strlen(setpoint)) 462 return (EPERM); 463 } 464 break; 465 466 case ZFS_PROP_MLSLABEL: 467 if (!is_system_labeled()) 468 return (EPERM); 469 470 if (nvpair_value_string(propval, &strval) == 0) { 471 int err; 472 473 err = zfs_set_slabel_policy(dsname, strval, CRED()); 474 if (err != 0) 475 return (err); 476 } 477 break; 478 } 479 480 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr)); 481 } 482 483 int 484 zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr) 485 { 486 int error; 487 488 error = zfs_dozonecheck(zc->zc_name, cr); 489 if (error) 490 return (error); 491 492 /* 493 * permission to set permissions will be evaluated later in 494 * dsl_deleg_can_allow() 495 */ 496 return (0); 497 } 498 499 int 500 zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr) 501 { 502 return (zfs_secpolicy_write_perms(zc->zc_name, 503 ZFS_DELEG_PERM_ROLLBACK, cr)); 504 } 505 506 int 507 zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr) 508 { 509 return (zfs_secpolicy_write_perms(zc->zc_name, 510 ZFS_DELEG_PERM_SEND, cr)); 511 } 512 513 static int 514 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, cred_t *cr) 515 { 516 vnode_t *vp; 517 int error; 518 519 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 520 NO_FOLLOW, NULL, &vp)) != 0) 521 return (error); 522 523 /* Now make sure mntpnt and dataset are ZFS */ 524 525 if (vp->v_vfsp->vfs_fstype != zfsfstype || 526 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 527 zc->zc_name) != 0)) { 528 VN_RELE(vp); 529 return (EPERM); 530 } 531 532 VN_RELE(vp); 533 return (dsl_deleg_access(zc->zc_name, 534 ZFS_DELEG_PERM_SHARE, cr)); 535 } 536 537 int 538 zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr) 539 { 540 if (!INGLOBALZONE(curproc)) 541 return (EPERM); 542 543 if (secpolicy_nfs(cr) == 0) { 544 return (0); 545 } else { 546 return (zfs_secpolicy_deleg_share(zc, cr)); 547 } 548 } 549 550 int 551 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, cred_t *cr) 552 { 553 if (!INGLOBALZONE(curproc)) 554 return (EPERM); 555 556 if (secpolicy_smb(cr) == 0) { 557 return (0); 558 } else { 559 return (zfs_secpolicy_deleg_share(zc, cr)); 560 } 561 } 562 563 static int 564 zfs_get_parent(const char *datasetname, char *parent, int parentsize) 565 { 566 char *cp; 567 568 /* 569 * Remove the @bla or /bla from the end of the name to get the parent. 570 */ 571 (void) strncpy(parent, datasetname, parentsize); 572 cp = strrchr(parent, '@'); 573 if (cp != NULL) { 574 cp[0] = '\0'; 575 } else { 576 cp = strrchr(parent, '/'); 577 if (cp == NULL) 578 return (ENOENT); 579 cp[0] = '\0'; 580 } 581 582 return (0); 583 } 584 585 int 586 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 587 { 588 int error; 589 590 if ((error = zfs_secpolicy_write_perms(name, 591 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 592 return (error); 593 594 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); 595 } 596 597 static int 598 zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr) 599 { 600 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); 601 } 602 603 /* 604 * Destroying snapshots with delegated permissions requires 605 * descendent mount and destroy permissions. 606 * Reassemble the full filesystem@snap name so dsl_deleg_access() 607 * can do the correct permission check. 608 * 609 * Since this routine is used when doing a recursive destroy of snapshots 610 * and destroying snapshots requires descendent permissions, a successfull 611 * check of the top level snapshot applies to snapshots of all descendent 612 * datasets as well. 613 */ 614 static int 615 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, cred_t *cr) 616 { 617 int error; 618 char *dsname; 619 620 dsname = kmem_asprintf("%s@%s", zc->zc_name, zc->zc_value); 621 622 error = zfs_secpolicy_destroy_perms(dsname, cr); 623 624 strfree(dsname); 625 return (error); 626 } 627 628 /* 629 * Must have sys_config privilege to check the iscsi permission 630 */ 631 /* ARGSUSED */ 632 static int 633 zfs_secpolicy_iscsi(zfs_cmd_t *zc, cred_t *cr) 634 { 635 return (secpolicy_zfs(cr)); 636 } 637 638 int 639 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 640 { 641 char parentname[MAXNAMELEN]; 642 int error; 643 644 if ((error = zfs_secpolicy_write_perms(from, 645 ZFS_DELEG_PERM_RENAME, cr)) != 0) 646 return (error); 647 648 if ((error = zfs_secpolicy_write_perms(from, 649 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 650 return (error); 651 652 if ((error = zfs_get_parent(to, parentname, 653 sizeof (parentname))) != 0) 654 return (error); 655 656 if ((error = zfs_secpolicy_write_perms(parentname, 657 ZFS_DELEG_PERM_CREATE, cr)) != 0) 658 return (error); 659 660 if ((error = zfs_secpolicy_write_perms(parentname, 661 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 662 return (error); 663 664 return (error); 665 } 666 667 static int 668 zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr) 669 { 670 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); 671 } 672 673 static int 674 zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr) 675 { 676 char parentname[MAXNAMELEN]; 677 objset_t *clone; 678 int error; 679 680 error = zfs_secpolicy_write_perms(zc->zc_name, 681 ZFS_DELEG_PERM_PROMOTE, cr); 682 if (error) 683 return (error); 684 685 error = dmu_objset_hold(zc->zc_name, FTAG, &clone); 686 687 if (error == 0) { 688 dsl_dataset_t *pclone = NULL; 689 dsl_dir_t *dd; 690 dd = clone->os_dsl_dataset->ds_dir; 691 692 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); 693 error = dsl_dataset_hold_obj(dd->dd_pool, 694 dd->dd_phys->dd_origin_obj, FTAG, &pclone); 695 rw_exit(&dd->dd_pool->dp_config_rwlock); 696 if (error) { 697 dmu_objset_rele(clone, FTAG); 698 return (error); 699 } 700 701 error = zfs_secpolicy_write_perms(zc->zc_name, 702 ZFS_DELEG_PERM_MOUNT, cr); 703 704 dsl_dataset_name(pclone, parentname); 705 dmu_objset_rele(clone, FTAG); 706 dsl_dataset_rele(pclone, FTAG); 707 if (error == 0) 708 error = zfs_secpolicy_write_perms(parentname, 709 ZFS_DELEG_PERM_PROMOTE, cr); 710 } 711 return (error); 712 } 713 714 static int 715 zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr) 716 { 717 int error; 718 719 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 720 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 721 return (error); 722 723 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 724 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 725 return (error); 726 727 return (zfs_secpolicy_write_perms(zc->zc_name, 728 ZFS_DELEG_PERM_CREATE, cr)); 729 } 730 731 int 732 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 733 { 734 return (zfs_secpolicy_write_perms(name, 735 ZFS_DELEG_PERM_SNAPSHOT, cr)); 736 } 737 738 static int 739 zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr) 740 { 741 742 return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr)); 743 } 744 745 static int 746 zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr) 747 { 748 char parentname[MAXNAMELEN]; 749 int error; 750 751 if ((error = zfs_get_parent(zc->zc_name, parentname, 752 sizeof (parentname))) != 0) 753 return (error); 754 755 if (zc->zc_value[0] != '\0') { 756 if ((error = zfs_secpolicy_write_perms(zc->zc_value, 757 ZFS_DELEG_PERM_CLONE, cr)) != 0) 758 return (error); 759 } 760 761 if ((error = zfs_secpolicy_write_perms(parentname, 762 ZFS_DELEG_PERM_CREATE, cr)) != 0) 763 return (error); 764 765 error = zfs_secpolicy_write_perms(parentname, 766 ZFS_DELEG_PERM_MOUNT, cr); 767 768 return (error); 769 } 770 771 static int 772 zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr) 773 { 774 int error; 775 776 error = secpolicy_fs_unmount(cr, NULL); 777 if (error) { 778 error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr); 779 } 780 return (error); 781 } 782 783 /* 784 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 785 * SYS_CONFIG privilege, which is not available in a local zone. 786 */ 787 /* ARGSUSED */ 788 static int 789 zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr) 790 { 791 if (secpolicy_sys_config(cr, B_FALSE) != 0) 792 return (EPERM); 793 794 return (0); 795 } 796 797 /* 798 * Policy for fault injection. Requires all privileges. 799 */ 800 /* ARGSUSED */ 801 static int 802 zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr) 803 { 804 return (secpolicy_zinject(cr)); 805 } 806 807 static int 808 zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr) 809 { 810 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 811 812 if (prop == ZPROP_INVAL) { 813 if (!zfs_prop_user(zc->zc_value)) 814 return (EINVAL); 815 return (zfs_secpolicy_write_perms(zc->zc_name, 816 ZFS_DELEG_PERM_USERPROP, cr)); 817 } else { 818 return (zfs_secpolicy_setprop(zc->zc_name, prop, 819 NULL, cr)); 820 } 821 } 822 823 static int 824 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, cred_t *cr) 825 { 826 int err = zfs_secpolicy_read(zc, cr); 827 if (err) 828 return (err); 829 830 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 831 return (EINVAL); 832 833 if (zc->zc_value[0] == 0) { 834 /* 835 * They are asking about a posix uid/gid. If it's 836 * themself, allow it. 837 */ 838 if (zc->zc_objset_type == ZFS_PROP_USERUSED || 839 zc->zc_objset_type == ZFS_PROP_USERQUOTA) { 840 if (zc->zc_guid == crgetuid(cr)) 841 return (0); 842 } else { 843 if (groupmember(zc->zc_guid, cr)) 844 return (0); 845 } 846 } 847 848 return (zfs_secpolicy_write_perms(zc->zc_name, 849 userquota_perms[zc->zc_objset_type], cr)); 850 } 851 852 static int 853 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, cred_t *cr) 854 { 855 int err = zfs_secpolicy_read(zc, cr); 856 if (err) 857 return (err); 858 859 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 860 return (EINVAL); 861 862 return (zfs_secpolicy_write_perms(zc->zc_name, 863 userquota_perms[zc->zc_objset_type], cr)); 864 } 865 866 static int 867 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, cred_t *cr) 868 { 869 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, 870 NULL, cr)); 871 } 872 873 static int 874 zfs_secpolicy_hold(zfs_cmd_t *zc, cred_t *cr) 875 { 876 return (zfs_secpolicy_write_perms(zc->zc_name, 877 ZFS_DELEG_PERM_HOLD, cr)); 878 } 879 880 static int 881 zfs_secpolicy_release(zfs_cmd_t *zc, cred_t *cr) 882 { 883 return (zfs_secpolicy_write_perms(zc->zc_name, 884 ZFS_DELEG_PERM_RELEASE, cr)); 885 } 886 887 /* 888 * Returns the nvlist as specified by the user in the zfs_cmd_t. 889 */ 890 static int 891 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) 892 { 893 char *packed; 894 int error; 895 nvlist_t *list = NULL; 896 897 /* 898 * Read in and unpack the user-supplied nvlist. 899 */ 900 if (size == 0) 901 return (EINVAL); 902 903 packed = kmem_alloc(size, KM_SLEEP); 904 905 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, 906 iflag)) != 0) { 907 kmem_free(packed, size); 908 return (error); 909 } 910 911 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 912 kmem_free(packed, size); 913 return (error); 914 } 915 916 kmem_free(packed, size); 917 918 *nvp = list; 919 return (0); 920 } 921 922 static int 923 fit_error_list(zfs_cmd_t *zc, nvlist_t **errors) 924 { 925 size_t size; 926 927 VERIFY(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0); 928 929 if (size > zc->zc_nvlist_dst_size) { 930 nvpair_t *more_errors; 931 int n = 0; 932 933 if (zc->zc_nvlist_dst_size < 1024) 934 return (ENOMEM); 935 936 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, 0) == 0); 937 more_errors = nvlist_prev_nvpair(*errors, NULL); 938 939 do { 940 nvpair_t *pair = nvlist_prev_nvpair(*errors, 941 more_errors); 942 VERIFY(nvlist_remove_nvpair(*errors, pair) == 0); 943 n++; 944 VERIFY(nvlist_size(*errors, &size, 945 NV_ENCODE_NATIVE) == 0); 946 } while (size > zc->zc_nvlist_dst_size); 947 948 VERIFY(nvlist_remove_nvpair(*errors, more_errors) == 0); 949 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, n) == 0); 950 ASSERT(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0); 951 ASSERT(size <= zc->zc_nvlist_dst_size); 952 } 953 954 return (0); 955 } 956 957 static int 958 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 959 { 960 char *packed = NULL; 961 size_t size; 962 int error; 963 964 VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0); 965 966 if (size > zc->zc_nvlist_dst_size) { 967 error = ENOMEM; 968 } else { 969 packed = kmem_alloc(size, KM_SLEEP); 970 VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE, 971 KM_SLEEP) == 0); 972 error = ddi_copyout(packed, 973 (void *)(uintptr_t)zc->zc_nvlist_dst, size, zc->zc_iflags); 974 kmem_free(packed, size); 975 } 976 977 zc->zc_nvlist_dst_size = size; 978 return (error); 979 } 980 981 static int 982 getzfsvfs(const char *dsname, zfsvfs_t **zfvp) 983 { 984 objset_t *os; 985 int error; 986 987 error = dmu_objset_hold(dsname, FTAG, &os); 988 if (error) 989 return (error); 990 if (dmu_objset_type(os) != DMU_OST_ZFS) { 991 dmu_objset_rele(os, FTAG); 992 return (EINVAL); 993 } 994 995 mutex_enter(&os->os_user_ptr_lock); 996 *zfvp = dmu_objset_get_user(os); 997 if (*zfvp) { 998 VFS_HOLD((*zfvp)->z_vfs); 999 } else { 1000 error = ESRCH; 1001 } 1002 mutex_exit(&os->os_user_ptr_lock); 1003 dmu_objset_rele(os, FTAG); 1004 return (error); 1005 } 1006 1007 /* 1008 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which 1009 * case its z_vfs will be NULL, and it will be opened as the owner. 1010 */ 1011 static int 1012 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp) 1013 { 1014 int error = 0; 1015 1016 if (getzfsvfs(name, zfvp) != 0) 1017 error = zfsvfs_create(name, zfvp); 1018 if (error == 0) { 1019 rrw_enter(&(*zfvp)->z_teardown_lock, RW_READER, tag); 1020 if ((*zfvp)->z_unmounted) { 1021 /* 1022 * XXX we could probably try again, since the unmounting 1023 * thread should be just about to disassociate the 1024 * objset from the zfsvfs. 1025 */ 1026 rrw_exit(&(*zfvp)->z_teardown_lock, tag); 1027 return (EBUSY); 1028 } 1029 } 1030 return (error); 1031 } 1032 1033 static void 1034 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) 1035 { 1036 rrw_exit(&zfsvfs->z_teardown_lock, tag); 1037 1038 if (zfsvfs->z_vfs) { 1039 VFS_RELE(zfsvfs->z_vfs); 1040 } else { 1041 dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1042 zfsvfs_free(zfsvfs); 1043 } 1044 } 1045 1046 static int 1047 zfs_ioc_pool_create(zfs_cmd_t *zc) 1048 { 1049 int error; 1050 nvlist_t *config, *props = NULL; 1051 nvlist_t *rootprops = NULL; 1052 nvlist_t *zplprops = NULL; 1053 char *buf; 1054 1055 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1056 zc->zc_iflags, &config)) 1057 return (error); 1058 1059 if (zc->zc_nvlist_src_size != 0 && (error = 1060 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1061 zc->zc_iflags, &props))) { 1062 nvlist_free(config); 1063 return (error); 1064 } 1065 1066 if (props) { 1067 nvlist_t *nvl = NULL; 1068 uint64_t version = SPA_VERSION; 1069 1070 (void) nvlist_lookup_uint64(props, 1071 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); 1072 if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) { 1073 error = EINVAL; 1074 goto pool_props_bad; 1075 } 1076 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); 1077 if (nvl) { 1078 error = nvlist_dup(nvl, &rootprops, KM_SLEEP); 1079 if (error != 0) { 1080 nvlist_free(config); 1081 nvlist_free(props); 1082 return (error); 1083 } 1084 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); 1085 } 1086 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1087 error = zfs_fill_zplprops_root(version, rootprops, 1088 zplprops, NULL); 1089 if (error) 1090 goto pool_props_bad; 1091 } 1092 1093 buf = history_str_get(zc); 1094 1095 error = spa_create(zc->zc_name, config, props, buf, zplprops); 1096 1097 /* 1098 * Set the remaining root properties 1099 */ 1100 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, 1101 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) 1102 (void) spa_destroy(zc->zc_name); 1103 1104 if (buf != NULL) 1105 history_str_free(buf); 1106 1107 pool_props_bad: 1108 nvlist_free(rootprops); 1109 nvlist_free(zplprops); 1110 nvlist_free(config); 1111 nvlist_free(props); 1112 1113 return (error); 1114 } 1115 1116 static int 1117 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 1118 { 1119 int error; 1120 zfs_log_history(zc); 1121 error = spa_destroy(zc->zc_name); 1122 if (error == 0) 1123 zvol_remove_minors(zc->zc_name); 1124 return (error); 1125 } 1126 1127 static int 1128 zfs_ioc_pool_import(zfs_cmd_t *zc) 1129 { 1130 nvlist_t *config, *props = NULL; 1131 uint64_t guid; 1132 int error; 1133 1134 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1135 zc->zc_iflags, &config)) != 0) 1136 return (error); 1137 1138 if (zc->zc_nvlist_src_size != 0 && (error = 1139 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1140 zc->zc_iflags, &props))) { 1141 nvlist_free(config); 1142 return (error); 1143 } 1144 1145 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1146 guid != zc->zc_guid) 1147 error = EINVAL; 1148 else if (zc->zc_cookie) 1149 error = spa_import_verbatim(zc->zc_name, config, props); 1150 else 1151 error = spa_import(zc->zc_name, config, props); 1152 1153 if (zc->zc_nvlist_dst != 0) 1154 (void) put_nvlist(zc, config); 1155 1156 nvlist_free(config); 1157 1158 if (props) 1159 nvlist_free(props); 1160 1161 return (error); 1162 } 1163 1164 static int 1165 zfs_ioc_pool_export(zfs_cmd_t *zc) 1166 { 1167 int error; 1168 boolean_t force = (boolean_t)zc->zc_cookie; 1169 boolean_t hardforce = (boolean_t)zc->zc_guid; 1170 1171 zfs_log_history(zc); 1172 error = spa_export(zc->zc_name, NULL, force, hardforce); 1173 if (error == 0) 1174 zvol_remove_minors(zc->zc_name); 1175 return (error); 1176 } 1177 1178 static int 1179 zfs_ioc_pool_configs(zfs_cmd_t *zc) 1180 { 1181 nvlist_t *configs; 1182 int error; 1183 1184 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 1185 return (EEXIST); 1186 1187 error = put_nvlist(zc, configs); 1188 1189 nvlist_free(configs); 1190 1191 return (error); 1192 } 1193 1194 static int 1195 zfs_ioc_pool_stats(zfs_cmd_t *zc) 1196 { 1197 nvlist_t *config; 1198 int error; 1199 int ret = 0; 1200 1201 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 1202 sizeof (zc->zc_value)); 1203 1204 if (config != NULL) { 1205 ret = put_nvlist(zc, config); 1206 nvlist_free(config); 1207 1208 /* 1209 * The config may be present even if 'error' is non-zero. 1210 * In this case we return success, and preserve the real errno 1211 * in 'zc_cookie'. 1212 */ 1213 zc->zc_cookie = error; 1214 } else { 1215 ret = error; 1216 } 1217 1218 return (ret); 1219 } 1220 1221 /* 1222 * Try to import the given pool, returning pool stats as appropriate so that 1223 * user land knows which devices are available and overall pool health. 1224 */ 1225 static int 1226 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 1227 { 1228 nvlist_t *tryconfig, *config; 1229 int error; 1230 1231 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1232 zc->zc_iflags, &tryconfig)) != 0) 1233 return (error); 1234 1235 config = spa_tryimport(tryconfig); 1236 1237 nvlist_free(tryconfig); 1238 1239 if (config == NULL) 1240 return (EINVAL); 1241 1242 error = put_nvlist(zc, config); 1243 nvlist_free(config); 1244 1245 return (error); 1246 } 1247 1248 static int 1249 zfs_ioc_pool_scrub(zfs_cmd_t *zc) 1250 { 1251 spa_t *spa; 1252 int error; 1253 1254 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1255 return (error); 1256 1257 error = spa_scrub(spa, zc->zc_cookie); 1258 1259 spa_close(spa, FTAG); 1260 1261 return (error); 1262 } 1263 1264 static int 1265 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 1266 { 1267 spa_t *spa; 1268 int error; 1269 1270 error = spa_open(zc->zc_name, &spa, FTAG); 1271 if (error == 0) { 1272 spa_freeze(spa); 1273 spa_close(spa, FTAG); 1274 } 1275 return (error); 1276 } 1277 1278 static int 1279 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 1280 { 1281 spa_t *spa; 1282 int error; 1283 1284 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1285 return (error); 1286 1287 if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) { 1288 spa_close(spa, FTAG); 1289 return (EINVAL); 1290 } 1291 1292 spa_upgrade(spa, zc->zc_cookie); 1293 spa_close(spa, FTAG); 1294 1295 return (error); 1296 } 1297 1298 static int 1299 zfs_ioc_pool_get_history(zfs_cmd_t *zc) 1300 { 1301 spa_t *spa; 1302 char *hist_buf; 1303 uint64_t size; 1304 int error; 1305 1306 if ((size = zc->zc_history_len) == 0) 1307 return (EINVAL); 1308 1309 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1310 return (error); 1311 1312 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 1313 spa_close(spa, FTAG); 1314 return (ENOTSUP); 1315 } 1316 1317 hist_buf = kmem_alloc(size, KM_SLEEP); 1318 if ((error = spa_history_get(spa, &zc->zc_history_offset, 1319 &zc->zc_history_len, hist_buf)) == 0) { 1320 error = ddi_copyout(hist_buf, 1321 (void *)(uintptr_t)zc->zc_history, 1322 zc->zc_history_len, zc->zc_iflags); 1323 } 1324 1325 spa_close(spa, FTAG); 1326 kmem_free(hist_buf, size); 1327 return (error); 1328 } 1329 1330 static int 1331 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 1332 { 1333 int error; 1334 1335 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)) 1336 return (error); 1337 1338 return (0); 1339 } 1340 1341 /* 1342 * inputs: 1343 * zc_name name of filesystem 1344 * zc_obj object to find 1345 * 1346 * outputs: 1347 * zc_value name of object 1348 */ 1349 static int 1350 zfs_ioc_obj_to_path(zfs_cmd_t *zc) 1351 { 1352 objset_t *os; 1353 int error; 1354 1355 /* XXX reading from objset not owned */ 1356 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1357 return (error); 1358 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1359 dmu_objset_rele(os, FTAG); 1360 return (EINVAL); 1361 } 1362 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, 1363 sizeof (zc->zc_value)); 1364 dmu_objset_rele(os, FTAG); 1365 1366 return (error); 1367 } 1368 1369 static int 1370 zfs_ioc_vdev_add(zfs_cmd_t *zc) 1371 { 1372 spa_t *spa; 1373 int error; 1374 nvlist_t *config, **l2cache, **spares; 1375 uint_t nl2cache = 0, nspares = 0; 1376 1377 error = spa_open(zc->zc_name, &spa, FTAG); 1378 if (error != 0) 1379 return (error); 1380 1381 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1382 zc->zc_iflags, &config); 1383 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, 1384 &l2cache, &nl2cache); 1385 1386 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, 1387 &spares, &nspares); 1388 1389 /* 1390 * A root pool with concatenated devices is not supported. 1391 * Thus, can not add a device to a root pool. 1392 * 1393 * Intent log device can not be added to a rootpool because 1394 * during mountroot, zil is replayed, a seperated log device 1395 * can not be accessed during the mountroot time. 1396 * 1397 * l2cache and spare devices are ok to be added to a rootpool. 1398 */ 1399 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { 1400 spa_close(spa, FTAG); 1401 return (EDOM); 1402 } 1403 1404 if (error == 0) { 1405 error = spa_vdev_add(spa, config); 1406 nvlist_free(config); 1407 } 1408 spa_close(spa, FTAG); 1409 return (error); 1410 } 1411 1412 static int 1413 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 1414 { 1415 spa_t *spa; 1416 int error; 1417 1418 error = spa_open(zc->zc_name, &spa, FTAG); 1419 if (error != 0) 1420 return (error); 1421 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 1422 spa_close(spa, FTAG); 1423 return (error); 1424 } 1425 1426 static int 1427 zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 1428 { 1429 spa_t *spa; 1430 int error; 1431 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 1432 1433 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1434 return (error); 1435 switch (zc->zc_cookie) { 1436 case VDEV_STATE_ONLINE: 1437 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 1438 break; 1439 1440 case VDEV_STATE_OFFLINE: 1441 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 1442 break; 1443 1444 case VDEV_STATE_FAULTED: 1445 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1446 zc->zc_obj != VDEV_AUX_EXTERNAL) 1447 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1448 1449 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); 1450 break; 1451 1452 case VDEV_STATE_DEGRADED: 1453 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1454 zc->zc_obj != VDEV_AUX_EXTERNAL) 1455 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1456 1457 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj); 1458 break; 1459 1460 default: 1461 error = EINVAL; 1462 } 1463 zc->zc_cookie = newstate; 1464 spa_close(spa, FTAG); 1465 return (error); 1466 } 1467 1468 static int 1469 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1470 { 1471 spa_t *spa; 1472 int replacing = zc->zc_cookie; 1473 nvlist_t *config; 1474 int error; 1475 1476 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1477 return (error); 1478 1479 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1480 zc->zc_iflags, &config)) == 0) { 1481 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 1482 nvlist_free(config); 1483 } 1484 1485 spa_close(spa, FTAG); 1486 return (error); 1487 } 1488 1489 static int 1490 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 1491 { 1492 spa_t *spa; 1493 int error; 1494 1495 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1496 return (error); 1497 1498 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); 1499 1500 spa_close(spa, FTAG); 1501 return (error); 1502 } 1503 1504 static int 1505 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 1506 { 1507 spa_t *spa; 1508 char *path = zc->zc_value; 1509 uint64_t guid = zc->zc_guid; 1510 int error; 1511 1512 error = spa_open(zc->zc_name, &spa, FTAG); 1513 if (error != 0) 1514 return (error); 1515 1516 error = spa_vdev_setpath(spa, guid, path); 1517 spa_close(spa, FTAG); 1518 return (error); 1519 } 1520 1521 static int 1522 zfs_ioc_vdev_setfru(zfs_cmd_t *zc) 1523 { 1524 spa_t *spa; 1525 char *fru = zc->zc_value; 1526 uint64_t guid = zc->zc_guid; 1527 int error; 1528 1529 error = spa_open(zc->zc_name, &spa, FTAG); 1530 if (error != 0) 1531 return (error); 1532 1533 error = spa_vdev_setfru(spa, guid, fru); 1534 spa_close(spa, FTAG); 1535 return (error); 1536 } 1537 1538 /* 1539 * inputs: 1540 * zc_name name of filesystem 1541 * zc_nvlist_dst_size size of buffer for property nvlist 1542 * 1543 * outputs: 1544 * zc_objset_stats stats 1545 * zc_nvlist_dst property nvlist 1546 * zc_nvlist_dst_size size of property nvlist 1547 */ 1548 static int 1549 zfs_ioc_objset_stats(zfs_cmd_t *zc) 1550 { 1551 objset_t *os = NULL; 1552 int error; 1553 nvlist_t *nv; 1554 1555 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1556 return (error); 1557 1558 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1559 1560 if (zc->zc_nvlist_dst != 0 && 1561 (error = dsl_prop_get_all(os, &nv)) == 0) { 1562 dmu_objset_stats(os, nv); 1563 /* 1564 * NB: zvol_get_stats() will read the objset contents, 1565 * which we aren't supposed to do with a 1566 * DS_MODE_USER hold, because it could be 1567 * inconsistent. So this is a bit of a workaround... 1568 * XXX reading with out owning 1569 */ 1570 if (!zc->zc_objset_stats.dds_inconsistent) { 1571 if (dmu_objset_type(os) == DMU_OST_ZVOL) 1572 VERIFY(zvol_get_stats(os, nv) == 0); 1573 } 1574 error = put_nvlist(zc, nv); 1575 nvlist_free(nv); 1576 } 1577 1578 dmu_objset_rele(os, FTAG); 1579 return (error); 1580 } 1581 1582 /* 1583 * inputs: 1584 * zc_name name of filesystem 1585 * zc_nvlist_dst_size size of buffer for property nvlist 1586 * 1587 * outputs: 1588 * zc_nvlist_dst received property nvlist 1589 * zc_nvlist_dst_size size of received property nvlist 1590 * 1591 * Gets received properties (distinct from local properties on or after 1592 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from 1593 * local property values. 1594 */ 1595 static int 1596 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) 1597 { 1598 objset_t *os = NULL; 1599 int error; 1600 nvlist_t *nv; 1601 1602 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1603 return (error); 1604 1605 /* 1606 * Without this check, we would return local property values if the 1607 * caller has not already received properties on or after 1608 * SPA_VERSION_RECVD_PROPS. 1609 */ 1610 if (!dsl_prop_get_hasrecvd(os)) { 1611 dmu_objset_rele(os, FTAG); 1612 return (ENOTSUP); 1613 } 1614 1615 if (zc->zc_nvlist_dst != 0 && 1616 (error = dsl_prop_get_received(os, &nv)) == 0) { 1617 error = put_nvlist(zc, nv); 1618 nvlist_free(nv); 1619 } 1620 1621 dmu_objset_rele(os, FTAG); 1622 return (error); 1623 } 1624 1625 static int 1626 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) 1627 { 1628 uint64_t value; 1629 int error; 1630 1631 /* 1632 * zfs_get_zplprop() will either find a value or give us 1633 * the default value (if there is one). 1634 */ 1635 if ((error = zfs_get_zplprop(os, prop, &value)) != 0) 1636 return (error); 1637 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); 1638 return (0); 1639 } 1640 1641 /* 1642 * inputs: 1643 * zc_name name of filesystem 1644 * zc_nvlist_dst_size size of buffer for zpl property nvlist 1645 * 1646 * outputs: 1647 * zc_nvlist_dst zpl property nvlist 1648 * zc_nvlist_dst_size size of zpl property nvlist 1649 */ 1650 static int 1651 zfs_ioc_objset_zplprops(zfs_cmd_t *zc) 1652 { 1653 objset_t *os; 1654 int err; 1655 1656 /* XXX reading without owning */ 1657 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1658 return (err); 1659 1660 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1661 1662 /* 1663 * NB: nvl_add_zplprop() will read the objset contents, 1664 * which we aren't supposed to do with a DS_MODE_USER 1665 * hold, because it could be inconsistent. 1666 */ 1667 if (zc->zc_nvlist_dst != NULL && 1668 !zc->zc_objset_stats.dds_inconsistent && 1669 dmu_objset_type(os) == DMU_OST_ZFS) { 1670 nvlist_t *nv; 1671 1672 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1673 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && 1674 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && 1675 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && 1676 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) 1677 err = put_nvlist(zc, nv); 1678 nvlist_free(nv); 1679 } else { 1680 err = ENOENT; 1681 } 1682 dmu_objset_rele(os, FTAG); 1683 return (err); 1684 } 1685 1686 static boolean_t 1687 dataset_name_hidden(const char *name) 1688 { 1689 /* 1690 * Skip over datasets that are not visible in this zone, 1691 * internal datasets (which have a $ in their name), and 1692 * temporary datasets (which have a % in their name). 1693 */ 1694 if (strchr(name, '$') != NULL) 1695 return (B_TRUE); 1696 if (strchr(name, '%') != NULL) 1697 return (B_TRUE); 1698 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 1699 return (B_TRUE); 1700 return (B_FALSE); 1701 } 1702 1703 /* 1704 * inputs: 1705 * zc_name name of filesystem 1706 * zc_cookie zap cursor 1707 * zc_nvlist_dst_size size of buffer for property nvlist 1708 * 1709 * outputs: 1710 * zc_name name of next filesystem 1711 * zc_cookie zap cursor 1712 * zc_objset_stats stats 1713 * zc_nvlist_dst property nvlist 1714 * zc_nvlist_dst_size size of property nvlist 1715 */ 1716 static int 1717 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 1718 { 1719 objset_t *os; 1720 int error; 1721 char *p; 1722 1723 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { 1724 if (error == ENOENT) 1725 error = ESRCH; 1726 return (error); 1727 } 1728 1729 p = strrchr(zc->zc_name, '/'); 1730 if (p == NULL || p[1] != '\0') 1731 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 1732 p = zc->zc_name + strlen(zc->zc_name); 1733 1734 /* 1735 * Pre-fetch the datasets. dmu_objset_prefetch() always returns 0 1736 * but is not declared void because its called by dmu_objset_find(). 1737 */ 1738 if (zc->zc_cookie == 0) { 1739 uint64_t cookie = 0; 1740 int len = sizeof (zc->zc_name) - (p - zc->zc_name); 1741 1742 while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0) 1743 (void) dmu_objset_prefetch(p, NULL); 1744 } 1745 1746 do { 1747 error = dmu_dir_list_next(os, 1748 sizeof (zc->zc_name) - (p - zc->zc_name), p, 1749 NULL, &zc->zc_cookie); 1750 if (error == ENOENT) 1751 error = ESRCH; 1752 } while (error == 0 && dataset_name_hidden(zc->zc_name) && 1753 !(zc->zc_iflags & FKIOCTL)); 1754 dmu_objset_rele(os, FTAG); 1755 1756 /* 1757 * If it's an internal dataset (ie. with a '$' in its name), 1758 * don't try to get stats for it, otherwise we'll return ENOENT. 1759 */ 1760 if (error == 0 && strchr(zc->zc_name, '$') == NULL) 1761 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 1762 return (error); 1763 } 1764 1765 /* 1766 * inputs: 1767 * zc_name name of filesystem 1768 * zc_cookie zap cursor 1769 * zc_nvlist_dst_size size of buffer for property nvlist 1770 * 1771 * outputs: 1772 * zc_name name of next snapshot 1773 * zc_objset_stats stats 1774 * zc_nvlist_dst property nvlist 1775 * zc_nvlist_dst_size size of property nvlist 1776 */ 1777 static int 1778 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 1779 { 1780 objset_t *os; 1781 int error; 1782 1783 if (zc->zc_cookie == 0) 1784 (void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch, 1785 NULL, DS_FIND_SNAPSHOTS); 1786 1787 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 1788 if (error) 1789 return (error == ENOENT ? ESRCH : error); 1790 1791 /* 1792 * A dataset name of maximum length cannot have any snapshots, 1793 * so exit immediately. 1794 */ 1795 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 1796 dmu_objset_rele(os, FTAG); 1797 return (ESRCH); 1798 } 1799 1800 error = dmu_snapshot_list_next(os, 1801 sizeof (zc->zc_name) - strlen(zc->zc_name), 1802 zc->zc_name + strlen(zc->zc_name), NULL, &zc->zc_cookie, NULL); 1803 dmu_objset_rele(os, FTAG); 1804 if (error == 0) 1805 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 1806 else if (error == ENOENT) 1807 error = ESRCH; 1808 1809 /* if we failed, undo the @ that we tacked on to zc_name */ 1810 if (error) 1811 *strchr(zc->zc_name, '@') = '\0'; 1812 return (error); 1813 } 1814 1815 static int 1816 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) 1817 { 1818 const char *propname = nvpair_name(pair); 1819 uint64_t *valary; 1820 unsigned int vallen; 1821 const char *domain; 1822 zfs_userquota_prop_t type; 1823 uint64_t rid; 1824 uint64_t quota; 1825 zfsvfs_t *zfsvfs; 1826 int err; 1827 1828 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 1829 nvlist_t *attrs; 1830 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 1831 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 1832 &pair) == 0); 1833 } 1834 1835 VERIFY(nvpair_value_uint64_array(pair, &valary, &vallen) == 0); 1836 VERIFY(vallen == 3); 1837 type = valary[0]; 1838 rid = valary[1]; 1839 quota = valary[2]; 1840 /* 1841 * The propname is encoded as 1842 * userquota@<rid>-<domain>. 1843 */ 1844 domain = strchr(propname, '-') + 1; 1845 1846 err = zfsvfs_hold(dsname, FTAG, &zfsvfs); 1847 if (err == 0) { 1848 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); 1849 zfsvfs_rele(zfsvfs, FTAG); 1850 } 1851 1852 return (err); 1853 } 1854 1855 /* 1856 * If the named property is one that has a special function to set its value, 1857 * return 0 on success and a positive error code on failure; otherwise if it is 1858 * not one of the special properties handled by this function, return -1. 1859 * 1860 * XXX: It would be better for callers of the properety interface if we handled 1861 * these special cases in dsl_prop.c (in the dsl layer). 1862 */ 1863 static int 1864 zfs_prop_set_special(const char *dsname, zprop_source_t source, 1865 nvpair_t *pair) 1866 { 1867 const char *propname = nvpair_name(pair); 1868 zfs_prop_t prop = zfs_name_to_prop(propname); 1869 uint64_t intval; 1870 int err; 1871 1872 if (prop == ZPROP_INVAL) { 1873 if (zfs_prop_userquota(propname)) 1874 return (zfs_prop_set_userquota(dsname, pair)); 1875 return (-1); 1876 } 1877 1878 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 1879 nvlist_t *attrs; 1880 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 1881 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 1882 &pair) == 0); 1883 } 1884 1885 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) 1886 return (-1); 1887 1888 VERIFY(0 == nvpair_value_uint64(pair, &intval)); 1889 1890 switch (prop) { 1891 case ZFS_PROP_QUOTA: 1892 err = dsl_dir_set_quota(dsname, source, intval); 1893 break; 1894 case ZFS_PROP_REFQUOTA: 1895 err = dsl_dataset_set_quota(dsname, source, intval); 1896 break; 1897 case ZFS_PROP_RESERVATION: 1898 err = dsl_dir_set_reservation(dsname, source, intval); 1899 break; 1900 case ZFS_PROP_REFRESERVATION: 1901 err = dsl_dataset_set_reservation(dsname, source, intval); 1902 break; 1903 case ZFS_PROP_VOLSIZE: 1904 err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip), 1905 intval); 1906 break; 1907 case ZFS_PROP_VERSION: 1908 { 1909 zfsvfs_t *zfsvfs; 1910 1911 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs)) != 0) 1912 break; 1913 1914 err = zfs_set_version(zfsvfs, intval); 1915 zfsvfs_rele(zfsvfs, FTAG); 1916 1917 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { 1918 zfs_cmd_t *zc; 1919 1920 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 1921 (void) strcpy(zc->zc_name, dsname); 1922 (void) zfs_ioc_userspace_upgrade(zc); 1923 kmem_free(zc, sizeof (zfs_cmd_t)); 1924 } 1925 break; 1926 } 1927 1928 default: 1929 err = -1; 1930 } 1931 1932 return (err); 1933 } 1934 1935 /* 1936 * This function is best effort. If it fails to set any of the given properties, 1937 * it continues to set as many as it can and returns the first error 1938 * encountered. If the caller provides a non-NULL errlist, it also gives the 1939 * complete list of names of all the properties it failed to set along with the 1940 * corresponding error numbers. The caller is responsible for freeing the 1941 * returned errlist. 1942 * 1943 * If every property is set successfully, zero is returned and the list pointed 1944 * at by errlist is NULL. 1945 */ 1946 int 1947 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, 1948 nvlist_t **errlist) 1949 { 1950 nvpair_t *pair; 1951 nvpair_t *propval; 1952 int rv = 0; 1953 uint64_t intval; 1954 char *strval; 1955 nvlist_t *genericnvl; 1956 nvlist_t *errors; 1957 nvlist_t *retrynvl; 1958 1959 VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1960 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1961 VERIFY(nvlist_alloc(&retrynvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1962 1963 retry: 1964 pair = NULL; 1965 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 1966 const char *propname = nvpair_name(pair); 1967 zfs_prop_t prop = zfs_name_to_prop(propname); 1968 int err = 0; 1969 1970 /* decode the property value */ 1971 propval = pair; 1972 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 1973 nvlist_t *attrs; 1974 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 1975 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 1976 &propval) == 0); 1977 } 1978 1979 /* Validate value type */ 1980 if (prop == ZPROP_INVAL) { 1981 if (zfs_prop_user(propname)) { 1982 if (nvpair_type(propval) != DATA_TYPE_STRING) 1983 err = EINVAL; 1984 } else if (zfs_prop_userquota(propname)) { 1985 if (nvpair_type(propval) != 1986 DATA_TYPE_UINT64_ARRAY) 1987 err = EINVAL; 1988 } 1989 } else { 1990 if (nvpair_type(propval) == DATA_TYPE_STRING) { 1991 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) 1992 err = EINVAL; 1993 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { 1994 const char *unused; 1995 1996 VERIFY(nvpair_value_uint64(propval, 1997 &intval) == 0); 1998 1999 switch (zfs_prop_get_type(prop)) { 2000 case PROP_TYPE_NUMBER: 2001 break; 2002 case PROP_TYPE_STRING: 2003 err = EINVAL; 2004 break; 2005 case PROP_TYPE_INDEX: 2006 if (zfs_prop_index_to_string(prop, 2007 intval, &unused) != 0) 2008 err = EINVAL; 2009 break; 2010 default: 2011 cmn_err(CE_PANIC, 2012 "unknown property type"); 2013 } 2014 } else { 2015 err = EINVAL; 2016 } 2017 } 2018 2019 /* Validate permissions */ 2020 if (err == 0) 2021 err = zfs_check_settable(dsname, pair, CRED()); 2022 2023 if (err == 0) { 2024 err = zfs_prop_set_special(dsname, source, pair); 2025 if (err == -1) { 2026 /* 2027 * For better performance we build up a list of 2028 * properties to set in a single transaction. 2029 */ 2030 err = nvlist_add_nvpair(genericnvl, pair); 2031 } else if (err != 0 && nvl != retrynvl) { 2032 /* 2033 * This may be a spurious error caused by 2034 * receiving quota and reservation out of order. 2035 * Try again in a second pass. 2036 */ 2037 err = nvlist_add_nvpair(retrynvl, pair); 2038 } 2039 } 2040 2041 if (err != 0) 2042 VERIFY(nvlist_add_int32(errors, propname, err) == 0); 2043 } 2044 2045 if (nvl != retrynvl && !nvlist_empty(retrynvl)) { 2046 nvl = retrynvl; 2047 goto retry; 2048 } 2049 2050 if (!nvlist_empty(genericnvl) && 2051 dsl_props_set(dsname, source, genericnvl) != 0) { 2052 /* 2053 * If this fails, we still want to set as many properties as we 2054 * can, so try setting them individually. 2055 */ 2056 pair = NULL; 2057 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { 2058 const char *propname = nvpair_name(pair); 2059 int err = 0; 2060 2061 propval = pair; 2062 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2063 nvlist_t *attrs; 2064 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2065 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2066 &propval) == 0); 2067 } 2068 2069 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2070 VERIFY(nvpair_value_string(propval, 2071 &strval) == 0); 2072 err = dsl_prop_set(dsname, propname, source, 1, 2073 strlen(strval) + 1, strval); 2074 } else { 2075 VERIFY(nvpair_value_uint64(propval, 2076 &intval) == 0); 2077 err = dsl_prop_set(dsname, propname, source, 8, 2078 1, &intval); 2079 } 2080 2081 if (err != 0) { 2082 VERIFY(nvlist_add_int32(errors, propname, 2083 err) == 0); 2084 } 2085 } 2086 } 2087 nvlist_free(genericnvl); 2088 nvlist_free(retrynvl); 2089 2090 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 2091 nvlist_free(errors); 2092 errors = NULL; 2093 } else { 2094 VERIFY(nvpair_value_int32(pair, &rv) == 0); 2095 } 2096 2097 if (errlist == NULL) 2098 nvlist_free(errors); 2099 else 2100 *errlist = errors; 2101 2102 return (rv); 2103 } 2104 2105 /* 2106 * Check that all the properties are valid user properties. 2107 */ 2108 static int 2109 zfs_check_userprops(char *fsname, nvlist_t *nvl) 2110 { 2111 nvpair_t *pair = NULL; 2112 int error = 0; 2113 2114 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2115 const char *propname = nvpair_name(pair); 2116 char *valstr; 2117 2118 if (!zfs_prop_user(propname) || 2119 nvpair_type(pair) != DATA_TYPE_STRING) 2120 return (EINVAL); 2121 2122 if (error = zfs_secpolicy_write_perms(fsname, 2123 ZFS_DELEG_PERM_USERPROP, CRED())) 2124 return (error); 2125 2126 if (strlen(propname) >= ZAP_MAXNAMELEN) 2127 return (ENAMETOOLONG); 2128 2129 VERIFY(nvpair_value_string(pair, &valstr) == 0); 2130 if (strlen(valstr) >= ZAP_MAXVALUELEN) 2131 return (E2BIG); 2132 } 2133 return (0); 2134 } 2135 2136 static void 2137 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) 2138 { 2139 nvpair_t *pair; 2140 2141 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2142 2143 pair = NULL; 2144 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { 2145 if (nvlist_exists(skipped, nvpair_name(pair))) 2146 continue; 2147 2148 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); 2149 } 2150 } 2151 2152 static int 2153 clear_received_props(objset_t *os, const char *fs, nvlist_t *props, 2154 nvlist_t *skipped) 2155 { 2156 int err = 0; 2157 nvlist_t *cleared_props = NULL; 2158 props_skip(props, skipped, &cleared_props); 2159 if (!nvlist_empty(cleared_props)) { 2160 /* 2161 * Acts on local properties until the dataset has received 2162 * properties at least once on or after SPA_VERSION_RECVD_PROPS. 2163 */ 2164 zprop_source_t flags = (ZPROP_SRC_NONE | 2165 (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0)); 2166 err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL); 2167 } 2168 nvlist_free(cleared_props); 2169 return (err); 2170 } 2171 2172 /* 2173 * inputs: 2174 * zc_name name of filesystem 2175 * zc_value name of property to set 2176 * zc_nvlist_src{_size} nvlist of properties to apply 2177 * zc_cookie received properties flag 2178 * 2179 * outputs: 2180 * zc_nvlist_dst{_size} error for each unapplied received property 2181 */ 2182 static int 2183 zfs_ioc_set_prop(zfs_cmd_t *zc) 2184 { 2185 nvlist_t *nvl; 2186 boolean_t received = zc->zc_cookie; 2187 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : 2188 ZPROP_SRC_LOCAL); 2189 nvlist_t *errors = NULL; 2190 int error; 2191 2192 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2193 zc->zc_iflags, &nvl)) != 0) 2194 return (error); 2195 2196 if (received) { 2197 nvlist_t *origprops; 2198 objset_t *os; 2199 2200 if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) { 2201 if (dsl_prop_get_received(os, &origprops) == 0) { 2202 (void) clear_received_props(os, 2203 zc->zc_name, origprops, nvl); 2204 nvlist_free(origprops); 2205 } 2206 2207 dsl_prop_set_hasrecvd(os); 2208 dmu_objset_rele(os, FTAG); 2209 } 2210 } 2211 2212 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors); 2213 2214 if (zc->zc_nvlist_dst != NULL && errors != NULL) { 2215 (void) put_nvlist(zc, errors); 2216 } 2217 2218 nvlist_free(errors); 2219 nvlist_free(nvl); 2220 return (error); 2221 } 2222 2223 /* 2224 * inputs: 2225 * zc_name name of filesystem 2226 * zc_value name of property to inherit 2227 * zc_cookie revert to received value if TRUE 2228 * 2229 * outputs: none 2230 */ 2231 static int 2232 zfs_ioc_inherit_prop(zfs_cmd_t *zc) 2233 { 2234 const char *propname = zc->zc_value; 2235 zfs_prop_t prop = zfs_name_to_prop(propname); 2236 boolean_t received = zc->zc_cookie; 2237 zprop_source_t source = (received 2238 ? ZPROP_SRC_NONE /* revert to received value, if any */ 2239 : ZPROP_SRC_INHERITED); /* explicitly inherit */ 2240 2241 if (received) { 2242 nvlist_t *dummy; 2243 nvpair_t *pair; 2244 zprop_type_t type; 2245 int err; 2246 2247 /* 2248 * zfs_prop_set_special() expects properties in the form of an 2249 * nvpair with type info. 2250 */ 2251 if (prop == ZPROP_INVAL) { 2252 if (!zfs_prop_user(propname)) 2253 return (EINVAL); 2254 2255 type = PROP_TYPE_STRING; 2256 } else { 2257 type = zfs_prop_get_type(prop); 2258 } 2259 2260 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2261 2262 switch (type) { 2263 case PROP_TYPE_STRING: 2264 VERIFY(0 == nvlist_add_string(dummy, propname, "")); 2265 break; 2266 case PROP_TYPE_NUMBER: 2267 case PROP_TYPE_INDEX: 2268 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); 2269 break; 2270 default: 2271 nvlist_free(dummy); 2272 return (EINVAL); 2273 } 2274 2275 pair = nvlist_next_nvpair(dummy, NULL); 2276 err = zfs_prop_set_special(zc->zc_name, source, pair); 2277 nvlist_free(dummy); 2278 if (err != -1) 2279 return (err); /* special property already handled */ 2280 } else { 2281 /* 2282 * Only check this in the non-received case. We want to allow 2283 * 'inherit -S' to revert non-inheritable properties like quota 2284 * and reservation to the received or default values even though 2285 * they are not considered inheritable. 2286 */ 2287 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) 2288 return (EINVAL); 2289 } 2290 2291 /* the property name has been validated by zfs_secpolicy_inherit() */ 2292 return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL)); 2293 } 2294 2295 static int 2296 zfs_ioc_pool_set_props(zfs_cmd_t *zc) 2297 { 2298 nvlist_t *props; 2299 spa_t *spa; 2300 int error; 2301 nvpair_t *pair; 2302 2303 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2304 zc->zc_iflags, &props)) 2305 return (error); 2306 2307 /* 2308 * If the only property is the configfile, then just do a spa_lookup() 2309 * to handle the faulted case. 2310 */ 2311 pair = nvlist_next_nvpair(props, NULL); 2312 if (pair != NULL && strcmp(nvpair_name(pair), 2313 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && 2314 nvlist_next_nvpair(props, pair) == NULL) { 2315 mutex_enter(&spa_namespace_lock); 2316 if ((spa = spa_lookup(zc->zc_name)) != NULL) { 2317 spa_configfile_set(spa, props, B_FALSE); 2318 spa_config_sync(spa, B_FALSE, B_TRUE); 2319 } 2320 mutex_exit(&spa_namespace_lock); 2321 if (spa != NULL) { 2322 nvlist_free(props); 2323 return (0); 2324 } 2325 } 2326 2327 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2328 nvlist_free(props); 2329 return (error); 2330 } 2331 2332 error = spa_prop_set(spa, props); 2333 2334 nvlist_free(props); 2335 spa_close(spa, FTAG); 2336 2337 return (error); 2338 } 2339 2340 static int 2341 zfs_ioc_pool_get_props(zfs_cmd_t *zc) 2342 { 2343 spa_t *spa; 2344 int error; 2345 nvlist_t *nvp = NULL; 2346 2347 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2348 /* 2349 * If the pool is faulted, there may be properties we can still 2350 * get (such as altroot and cachefile), so attempt to get them 2351 * anyway. 2352 */ 2353 mutex_enter(&spa_namespace_lock); 2354 if ((spa = spa_lookup(zc->zc_name)) != NULL) 2355 error = spa_prop_get(spa, &nvp); 2356 mutex_exit(&spa_namespace_lock); 2357 } else { 2358 error = spa_prop_get(spa, &nvp); 2359 spa_close(spa, FTAG); 2360 } 2361 2362 if (error == 0 && zc->zc_nvlist_dst != NULL) 2363 error = put_nvlist(zc, nvp); 2364 else 2365 error = EFAULT; 2366 2367 nvlist_free(nvp); 2368 return (error); 2369 } 2370 2371 static int 2372 zfs_ioc_iscsi_perm_check(zfs_cmd_t *zc) 2373 { 2374 nvlist_t *nvp; 2375 int error; 2376 uint32_t uid; 2377 uint32_t gid; 2378 uint32_t *groups; 2379 uint_t group_cnt; 2380 cred_t *usercred; 2381 2382 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2383 zc->zc_iflags, &nvp)) != 0) { 2384 return (error); 2385 } 2386 2387 if ((error = nvlist_lookup_uint32(nvp, 2388 ZFS_DELEG_PERM_UID, &uid)) != 0) { 2389 nvlist_free(nvp); 2390 return (EPERM); 2391 } 2392 2393 if ((error = nvlist_lookup_uint32(nvp, 2394 ZFS_DELEG_PERM_GID, &gid)) != 0) { 2395 nvlist_free(nvp); 2396 return (EPERM); 2397 } 2398 2399 if ((error = nvlist_lookup_uint32_array(nvp, ZFS_DELEG_PERM_GROUPS, 2400 &groups, &group_cnt)) != 0) { 2401 nvlist_free(nvp); 2402 return (EPERM); 2403 } 2404 usercred = cralloc(); 2405 if ((crsetugid(usercred, uid, gid) != 0) || 2406 (crsetgroups(usercred, group_cnt, (gid_t *)groups) != 0)) { 2407 nvlist_free(nvp); 2408 crfree(usercred); 2409 return (EPERM); 2410 } 2411 nvlist_free(nvp); 2412 error = dsl_deleg_access(zc->zc_name, 2413 zfs_prop_to_name(ZFS_PROP_SHAREISCSI), usercred); 2414 crfree(usercred); 2415 return (error); 2416 } 2417 2418 /* 2419 * inputs: 2420 * zc_name name of filesystem 2421 * zc_nvlist_src{_size} nvlist of delegated permissions 2422 * zc_perm_action allow/unallow flag 2423 * 2424 * outputs: none 2425 */ 2426 static int 2427 zfs_ioc_set_fsacl(zfs_cmd_t *zc) 2428 { 2429 int error; 2430 nvlist_t *fsaclnv = NULL; 2431 2432 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2433 zc->zc_iflags, &fsaclnv)) != 0) 2434 return (error); 2435 2436 /* 2437 * Verify nvlist is constructed correctly 2438 */ 2439 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 2440 nvlist_free(fsaclnv); 2441 return (EINVAL); 2442 } 2443 2444 /* 2445 * If we don't have PRIV_SYS_MOUNT, then validate 2446 * that user is allowed to hand out each permission in 2447 * the nvlist(s) 2448 */ 2449 2450 error = secpolicy_zfs(CRED()); 2451 if (error) { 2452 if (zc->zc_perm_action == B_FALSE) { 2453 error = dsl_deleg_can_allow(zc->zc_name, 2454 fsaclnv, CRED()); 2455 } else { 2456 error = dsl_deleg_can_unallow(zc->zc_name, 2457 fsaclnv, CRED()); 2458 } 2459 } 2460 2461 if (error == 0) 2462 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 2463 2464 nvlist_free(fsaclnv); 2465 return (error); 2466 } 2467 2468 /* 2469 * inputs: 2470 * zc_name name of filesystem 2471 * 2472 * outputs: 2473 * zc_nvlist_src{_size} nvlist of delegated permissions 2474 */ 2475 static int 2476 zfs_ioc_get_fsacl(zfs_cmd_t *zc) 2477 { 2478 nvlist_t *nvp; 2479 int error; 2480 2481 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 2482 error = put_nvlist(zc, nvp); 2483 nvlist_free(nvp); 2484 } 2485 2486 return (error); 2487 } 2488 2489 /* 2490 * Search the vfs list for a specified resource. Returns a pointer to it 2491 * or NULL if no suitable entry is found. The caller of this routine 2492 * is responsible for releasing the returned vfs pointer. 2493 */ 2494 static vfs_t * 2495 zfs_get_vfs(const char *resource) 2496 { 2497 struct vfs *vfsp; 2498 struct vfs *vfs_found = NULL; 2499 2500 vfs_list_read_lock(); 2501 vfsp = rootvfs; 2502 do { 2503 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 2504 VFS_HOLD(vfsp); 2505 vfs_found = vfsp; 2506 break; 2507 } 2508 vfsp = vfsp->vfs_next; 2509 } while (vfsp != rootvfs); 2510 vfs_list_unlock(); 2511 return (vfs_found); 2512 } 2513 2514 /* ARGSUSED */ 2515 static void 2516 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 2517 { 2518 zfs_creat_t *zct = arg; 2519 2520 zfs_create_fs(os, cr, zct->zct_zplprops, tx); 2521 } 2522 2523 #define ZFS_PROP_UNDEFINED ((uint64_t)-1) 2524 2525 /* 2526 * inputs: 2527 * createprops list of properties requested by creator 2528 * default_zplver zpl version to use if unspecified in createprops 2529 * fuids_ok fuids allowed in this version of the spa? 2530 * os parent objset pointer (NULL if root fs) 2531 * 2532 * outputs: 2533 * zplprops values for the zplprops we attach to the master node object 2534 * is_ci true if requested file system will be purely case-insensitive 2535 * 2536 * Determine the settings for utf8only, normalization and 2537 * casesensitivity. Specific values may have been requested by the 2538 * creator and/or we can inherit values from the parent dataset. If 2539 * the file system is of too early a vintage, a creator can not 2540 * request settings for these properties, even if the requested 2541 * setting is the default value. We don't actually want to create dsl 2542 * properties for these, so remove them from the source nvlist after 2543 * processing. 2544 */ 2545 static int 2546 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, 2547 boolean_t fuids_ok, nvlist_t *createprops, nvlist_t *zplprops, 2548 boolean_t *is_ci) 2549 { 2550 uint64_t sense = ZFS_PROP_UNDEFINED; 2551 uint64_t norm = ZFS_PROP_UNDEFINED; 2552 uint64_t u8 = ZFS_PROP_UNDEFINED; 2553 2554 ASSERT(zplprops != NULL); 2555 2556 /* 2557 * Pull out creator prop choices, if any. 2558 */ 2559 if (createprops) { 2560 (void) nvlist_lookup_uint64(createprops, 2561 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); 2562 (void) nvlist_lookup_uint64(createprops, 2563 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); 2564 (void) nvlist_remove_all(createprops, 2565 zfs_prop_to_name(ZFS_PROP_NORMALIZE)); 2566 (void) nvlist_lookup_uint64(createprops, 2567 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); 2568 (void) nvlist_remove_all(createprops, 2569 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 2570 (void) nvlist_lookup_uint64(createprops, 2571 zfs_prop_to_name(ZFS_PROP_CASE), &sense); 2572 (void) nvlist_remove_all(createprops, 2573 zfs_prop_to_name(ZFS_PROP_CASE)); 2574 } 2575 2576 /* 2577 * If the zpl version requested is whacky or the file system 2578 * or pool is version is too "young" to support normalization 2579 * and the creator tried to set a value for one of the props, 2580 * error out. 2581 */ 2582 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || 2583 (zplver >= ZPL_VERSION_FUID && !fuids_ok) || 2584 (zplver < ZPL_VERSION_NORMALIZATION && 2585 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || 2586 sense != ZFS_PROP_UNDEFINED))) 2587 return (ENOTSUP); 2588 2589 /* 2590 * Put the version in the zplprops 2591 */ 2592 VERIFY(nvlist_add_uint64(zplprops, 2593 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); 2594 2595 if (norm == ZFS_PROP_UNDEFINED) 2596 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); 2597 VERIFY(nvlist_add_uint64(zplprops, 2598 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); 2599 2600 /* 2601 * If we're normalizing, names must always be valid UTF-8 strings. 2602 */ 2603 if (norm) 2604 u8 = 1; 2605 if (u8 == ZFS_PROP_UNDEFINED) 2606 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); 2607 VERIFY(nvlist_add_uint64(zplprops, 2608 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); 2609 2610 if (sense == ZFS_PROP_UNDEFINED) 2611 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); 2612 VERIFY(nvlist_add_uint64(zplprops, 2613 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); 2614 2615 if (is_ci) 2616 *is_ci = (sense == ZFS_CASE_INSENSITIVE); 2617 2618 return (0); 2619 } 2620 2621 static int 2622 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, 2623 nvlist_t *zplprops, boolean_t *is_ci) 2624 { 2625 boolean_t fuids_ok = B_TRUE; 2626 uint64_t zplver = ZPL_VERSION; 2627 objset_t *os = NULL; 2628 char parentname[MAXNAMELEN]; 2629 char *cp; 2630 int error; 2631 2632 (void) strlcpy(parentname, dataset, sizeof (parentname)); 2633 cp = strrchr(parentname, '/'); 2634 ASSERT(cp != NULL); 2635 cp[0] = '\0'; 2636 2637 if (zfs_earlier_version(dataset, SPA_VERSION_USERSPACE)) 2638 zplver = ZPL_VERSION_USERSPACE - 1; 2639 if (zfs_earlier_version(dataset, SPA_VERSION_FUID)) { 2640 zplver = ZPL_VERSION_FUID - 1; 2641 fuids_ok = B_FALSE; 2642 } 2643 2644 /* 2645 * Open parent object set so we can inherit zplprop values. 2646 */ 2647 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) 2648 return (error); 2649 2650 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, createprops, 2651 zplprops, is_ci); 2652 dmu_objset_rele(os, FTAG); 2653 return (error); 2654 } 2655 2656 static int 2657 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, 2658 nvlist_t *zplprops, boolean_t *is_ci) 2659 { 2660 boolean_t fuids_ok = B_TRUE; 2661 uint64_t zplver = ZPL_VERSION; 2662 int error; 2663 2664 if (spa_vers < SPA_VERSION_FUID) { 2665 zplver = ZPL_VERSION_FUID - 1; 2666 fuids_ok = B_FALSE; 2667 } 2668 2669 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, createprops, 2670 zplprops, is_ci); 2671 return (error); 2672 } 2673 2674 /* 2675 * inputs: 2676 * zc_objset_type type of objset to create (fs vs zvol) 2677 * zc_name name of new objset 2678 * zc_value name of snapshot to clone from (may be empty) 2679 * zc_nvlist_src{_size} nvlist of properties to apply 2680 * 2681 * outputs: none 2682 */ 2683 static int 2684 zfs_ioc_create(zfs_cmd_t *zc) 2685 { 2686 objset_t *clone; 2687 int error = 0; 2688 zfs_creat_t zct; 2689 nvlist_t *nvprops = NULL; 2690 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 2691 dmu_objset_type_t type = zc->zc_objset_type; 2692 2693 switch (type) { 2694 2695 case DMU_OST_ZFS: 2696 cbfunc = zfs_create_cb; 2697 break; 2698 2699 case DMU_OST_ZVOL: 2700 cbfunc = zvol_create_cb; 2701 break; 2702 2703 default: 2704 cbfunc = NULL; 2705 break; 2706 } 2707 if (strchr(zc->zc_name, '@') || 2708 strchr(zc->zc_name, '%')) 2709 return (EINVAL); 2710 2711 if (zc->zc_nvlist_src != NULL && 2712 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2713 zc->zc_iflags, &nvprops)) != 0) 2714 return (error); 2715 2716 zct.zct_zplprops = NULL; 2717 zct.zct_props = nvprops; 2718 2719 if (zc->zc_value[0] != '\0') { 2720 /* 2721 * We're creating a clone of an existing snapshot. 2722 */ 2723 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 2724 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) { 2725 nvlist_free(nvprops); 2726 return (EINVAL); 2727 } 2728 2729 error = dmu_objset_hold(zc->zc_value, FTAG, &clone); 2730 if (error) { 2731 nvlist_free(nvprops); 2732 return (error); 2733 } 2734 2735 error = dmu_objset_clone(zc->zc_name, dmu_objset_ds(clone), 0); 2736 dmu_objset_rele(clone, FTAG); 2737 if (error) { 2738 nvlist_free(nvprops); 2739 return (error); 2740 } 2741 } else { 2742 boolean_t is_insensitive = B_FALSE; 2743 2744 if (cbfunc == NULL) { 2745 nvlist_free(nvprops); 2746 return (EINVAL); 2747 } 2748 2749 if (type == DMU_OST_ZVOL) { 2750 uint64_t volsize, volblocksize; 2751 2752 if (nvprops == NULL || 2753 nvlist_lookup_uint64(nvprops, 2754 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 2755 &volsize) != 0) { 2756 nvlist_free(nvprops); 2757 return (EINVAL); 2758 } 2759 2760 if ((error = nvlist_lookup_uint64(nvprops, 2761 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 2762 &volblocksize)) != 0 && error != ENOENT) { 2763 nvlist_free(nvprops); 2764 return (EINVAL); 2765 } 2766 2767 if (error != 0) 2768 volblocksize = zfs_prop_default_numeric( 2769 ZFS_PROP_VOLBLOCKSIZE); 2770 2771 if ((error = zvol_check_volblocksize( 2772 volblocksize)) != 0 || 2773 (error = zvol_check_volsize(volsize, 2774 volblocksize)) != 0) { 2775 nvlist_free(nvprops); 2776 return (error); 2777 } 2778 } else if (type == DMU_OST_ZFS) { 2779 int error; 2780 2781 /* 2782 * We have to have normalization and 2783 * case-folding flags correct when we do the 2784 * file system creation, so go figure them out 2785 * now. 2786 */ 2787 VERIFY(nvlist_alloc(&zct.zct_zplprops, 2788 NV_UNIQUE_NAME, KM_SLEEP) == 0); 2789 error = zfs_fill_zplprops(zc->zc_name, nvprops, 2790 zct.zct_zplprops, &is_insensitive); 2791 if (error != 0) { 2792 nvlist_free(nvprops); 2793 nvlist_free(zct.zct_zplprops); 2794 return (error); 2795 } 2796 } 2797 error = dmu_objset_create(zc->zc_name, type, 2798 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); 2799 nvlist_free(zct.zct_zplprops); 2800 } 2801 2802 /* 2803 * It would be nice to do this atomically. 2804 */ 2805 if (error == 0) { 2806 error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL, 2807 nvprops, NULL); 2808 if (error != 0) 2809 (void) dmu_objset_destroy(zc->zc_name, B_FALSE); 2810 } 2811 nvlist_free(nvprops); 2812 return (error); 2813 } 2814 2815 /* 2816 * inputs: 2817 * zc_name name of filesystem 2818 * zc_value short name of snapshot 2819 * zc_cookie recursive flag 2820 * zc_nvlist_src[_size] property list 2821 * 2822 * outputs: 2823 * zc_value short snapname (i.e. part after the '@') 2824 */ 2825 static int 2826 zfs_ioc_snapshot(zfs_cmd_t *zc) 2827 { 2828 nvlist_t *nvprops = NULL; 2829 int error; 2830 boolean_t recursive = zc->zc_cookie; 2831 2832 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 2833 return (EINVAL); 2834 2835 if (zc->zc_nvlist_src != NULL && 2836 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2837 zc->zc_iflags, &nvprops)) != 0) 2838 return (error); 2839 2840 error = zfs_check_userprops(zc->zc_name, nvprops); 2841 if (error) 2842 goto out; 2843 2844 if (!nvlist_empty(nvprops) && 2845 zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) { 2846 error = ENOTSUP; 2847 goto out; 2848 } 2849 2850 error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, 2851 nvprops, recursive); 2852 2853 out: 2854 nvlist_free(nvprops); 2855 return (error); 2856 } 2857 2858 int 2859 zfs_unmount_snap(const char *name, void *arg) 2860 { 2861 vfs_t *vfsp = NULL; 2862 2863 if (arg) { 2864 char *snapname = arg; 2865 char *fullname = kmem_asprintf("%s@%s", name, snapname); 2866 vfsp = zfs_get_vfs(fullname); 2867 strfree(fullname); 2868 } else if (strchr(name, '@')) { 2869 vfsp = zfs_get_vfs(name); 2870 } 2871 2872 if (vfsp) { 2873 /* 2874 * Always force the unmount for snapshots. 2875 */ 2876 int flag = MS_FORCE; 2877 int err; 2878 2879 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) { 2880 VFS_RELE(vfsp); 2881 return (err); 2882 } 2883 VFS_RELE(vfsp); 2884 if ((err = dounmount(vfsp, flag, kcred)) != 0) 2885 return (err); 2886 } 2887 return (0); 2888 } 2889 2890 /* 2891 * inputs: 2892 * zc_name name of filesystem 2893 * zc_value short name of snapshot 2894 * zc_defer_destroy mark for deferred destroy 2895 * 2896 * outputs: none 2897 */ 2898 static int 2899 zfs_ioc_destroy_snaps(zfs_cmd_t *zc) 2900 { 2901 int err; 2902 2903 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 2904 return (EINVAL); 2905 err = dmu_objset_find(zc->zc_name, 2906 zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN); 2907 if (err) 2908 return (err); 2909 return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value, 2910 zc->zc_defer_destroy)); 2911 } 2912 2913 /* 2914 * inputs: 2915 * zc_name name of dataset to destroy 2916 * zc_objset_type type of objset 2917 * zc_defer_destroy mark for deferred destroy 2918 * 2919 * outputs: none 2920 */ 2921 static int 2922 zfs_ioc_destroy(zfs_cmd_t *zc) 2923 { 2924 int err; 2925 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) { 2926 err = zfs_unmount_snap(zc->zc_name, NULL); 2927 if (err) 2928 return (err); 2929 } 2930 2931 err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy); 2932 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 2933 (void) zvol_remove_minor(zc->zc_name); 2934 return (err); 2935 } 2936 2937 /* 2938 * inputs: 2939 * zc_name name of dataset to rollback (to most recent snapshot) 2940 * 2941 * outputs: none 2942 */ 2943 static int 2944 zfs_ioc_rollback(zfs_cmd_t *zc) 2945 { 2946 dsl_dataset_t *ds, *clone; 2947 int error; 2948 zfsvfs_t *zfsvfs; 2949 char *clone_name; 2950 2951 error = dsl_dataset_hold(zc->zc_name, FTAG, &ds); 2952 if (error) 2953 return (error); 2954 2955 /* must not be a snapshot */ 2956 if (dsl_dataset_is_snapshot(ds)) { 2957 dsl_dataset_rele(ds, FTAG); 2958 return (EINVAL); 2959 } 2960 2961 /* must have a most recent snapshot */ 2962 if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) { 2963 dsl_dataset_rele(ds, FTAG); 2964 return (EINVAL); 2965 } 2966 2967 /* 2968 * Create clone of most recent snapshot. 2969 */ 2970 clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name); 2971 error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT); 2972 if (error) 2973 goto out; 2974 2975 error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone); 2976 if (error) 2977 goto out; 2978 2979 /* 2980 * Do clone swap. 2981 */ 2982 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 2983 error = zfs_suspend_fs(zfsvfs); 2984 if (error == 0) { 2985 int resume_err; 2986 2987 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) { 2988 error = dsl_dataset_clone_swap(clone, ds, 2989 B_TRUE); 2990 dsl_dataset_disown(ds, FTAG); 2991 ds = NULL; 2992 } else { 2993 error = EBUSY; 2994 } 2995 resume_err = zfs_resume_fs(zfsvfs, zc->zc_name); 2996 error = error ? error : resume_err; 2997 } 2998 VFS_RELE(zfsvfs->z_vfs); 2999 } else { 3000 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) { 3001 error = dsl_dataset_clone_swap(clone, ds, B_TRUE); 3002 dsl_dataset_disown(ds, FTAG); 3003 ds = NULL; 3004 } else { 3005 error = EBUSY; 3006 } 3007 } 3008 3009 /* 3010 * Destroy clone (which also closes it). 3011 */ 3012 (void) dsl_dataset_destroy(clone, FTAG, B_FALSE); 3013 3014 out: 3015 strfree(clone_name); 3016 if (ds) 3017 dsl_dataset_rele(ds, FTAG); 3018 return (error); 3019 } 3020 3021 /* 3022 * inputs: 3023 * zc_name old name of dataset 3024 * zc_value new name of dataset 3025 * zc_cookie recursive flag (only valid for snapshots) 3026 * 3027 * outputs: none 3028 */ 3029 static int 3030 zfs_ioc_rename(zfs_cmd_t *zc) 3031 { 3032 boolean_t recursive = zc->zc_cookie & 1; 3033 3034 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3035 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3036 strchr(zc->zc_value, '%')) 3037 return (EINVAL); 3038 3039 /* 3040 * Unmount snapshot unless we're doing a recursive rename, 3041 * in which case the dataset code figures out which snapshots 3042 * to unmount. 3043 */ 3044 if (!recursive && strchr(zc->zc_name, '@') != NULL && 3045 zc->zc_objset_type == DMU_OST_ZFS) { 3046 int err = zfs_unmount_snap(zc->zc_name, NULL); 3047 if (err) 3048 return (err); 3049 } 3050 if (zc->zc_objset_type == DMU_OST_ZVOL) 3051 (void) zvol_remove_minor(zc->zc_name); 3052 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive)); 3053 } 3054 3055 static int 3056 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3057 { 3058 const char *propname = nvpair_name(pair); 3059 boolean_t issnap = (strchr(dsname, '@') != NULL); 3060 zfs_prop_t prop = zfs_name_to_prop(propname); 3061 uint64_t intval; 3062 int err; 3063 3064 if (prop == ZPROP_INVAL) { 3065 if (zfs_prop_user(propname)) { 3066 if (err = zfs_secpolicy_write_perms(dsname, 3067 ZFS_DELEG_PERM_USERPROP, cr)) 3068 return (err); 3069 return (0); 3070 } 3071 3072 if (!issnap && zfs_prop_userquota(propname)) { 3073 const char *perm = NULL; 3074 const char *uq_prefix = 3075 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3076 const char *gq_prefix = 3077 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3078 3079 if (strncmp(propname, uq_prefix, 3080 strlen(uq_prefix)) == 0) { 3081 perm = ZFS_DELEG_PERM_USERQUOTA; 3082 } else if (strncmp(propname, gq_prefix, 3083 strlen(gq_prefix)) == 0) { 3084 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3085 } else { 3086 /* USERUSED and GROUPUSED are read-only */ 3087 return (EINVAL); 3088 } 3089 3090 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3091 return (err); 3092 return (0); 3093 } 3094 3095 return (EINVAL); 3096 } 3097 3098 if (issnap) 3099 return (EINVAL); 3100 3101 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3102 /* 3103 * dsl_prop_get_all_impl() returns properties in this 3104 * format. 3105 */ 3106 nvlist_t *attrs; 3107 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3108 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3109 &pair) == 0); 3110 } 3111 3112 /* 3113 * Check that this value is valid for this pool version 3114 */ 3115 switch (prop) { 3116 case ZFS_PROP_COMPRESSION: 3117 /* 3118 * If the user specified gzip compression, make sure 3119 * the SPA supports it. We ignore any errors here since 3120 * we'll catch them later. 3121 */ 3122 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3123 nvpair_value_uint64(pair, &intval) == 0) { 3124 if (intval >= ZIO_COMPRESS_GZIP_1 && 3125 intval <= ZIO_COMPRESS_GZIP_9 && 3126 zfs_earlier_version(dsname, 3127 SPA_VERSION_GZIP_COMPRESSION)) { 3128 return (ENOTSUP); 3129 } 3130 3131 if (intval == ZIO_COMPRESS_ZLE && 3132 zfs_earlier_version(dsname, 3133 SPA_VERSION_ZLE_COMPRESSION)) 3134 return (ENOTSUP); 3135 3136 /* 3137 * If this is a bootable dataset then 3138 * verify that the compression algorithm 3139 * is supported for booting. We must return 3140 * something other than ENOTSUP since it 3141 * implies a downrev pool version. 3142 */ 3143 if (zfs_is_bootfs(dsname) && 3144 !BOOTFS_COMPRESS_VALID(intval)) { 3145 return (ERANGE); 3146 } 3147 } 3148 break; 3149 3150 case ZFS_PROP_COPIES: 3151 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3152 return (ENOTSUP); 3153 break; 3154 3155 case ZFS_PROP_DEDUP: 3156 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3157 return (ENOTSUP); 3158 break; 3159 3160 case ZFS_PROP_SHARESMB: 3161 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3162 return (ENOTSUP); 3163 break; 3164 3165 case ZFS_PROP_ACLINHERIT: 3166 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3167 nvpair_value_uint64(pair, &intval) == 0) { 3168 if (intval == ZFS_ACL_PASSTHROUGH_X && 3169 zfs_earlier_version(dsname, 3170 SPA_VERSION_PASSTHROUGH_X)) 3171 return (ENOTSUP); 3172 } 3173 break; 3174 } 3175 3176 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3177 } 3178 3179 /* 3180 * Removes properties from the given props list that fail permission checks 3181 * needed to clear them and to restore them in case of a receive error. For each 3182 * property, make sure we have both set and inherit permissions. 3183 * 3184 * Returns the first error encountered if any permission checks fail. If the 3185 * caller provides a non-NULL errlist, it also gives the complete list of names 3186 * of all the properties that failed a permission check along with the 3187 * corresponding error numbers. The caller is responsible for freeing the 3188 * returned errlist. 3189 * 3190 * If every property checks out successfully, zero is returned and the list 3191 * pointed at by errlist is NULL. 3192 */ 3193 static int 3194 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 3195 { 3196 zfs_cmd_t *zc; 3197 nvpair_t *pair, *next_pair; 3198 nvlist_t *errors; 3199 int err, rv = 0; 3200 3201 if (props == NULL) 3202 return (0); 3203 3204 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3205 3206 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 3207 (void) strcpy(zc->zc_name, dataset); 3208 pair = nvlist_next_nvpair(props, NULL); 3209 while (pair != NULL) { 3210 next_pair = nvlist_next_nvpair(props, pair); 3211 3212 (void) strcpy(zc->zc_value, nvpair_name(pair)); 3213 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 3214 (err = zfs_secpolicy_inherit(zc, CRED())) != 0) { 3215 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 3216 VERIFY(nvlist_add_int32(errors, 3217 zc->zc_value, err) == 0); 3218 } 3219 pair = next_pair; 3220 } 3221 kmem_free(zc, sizeof (zfs_cmd_t)); 3222 3223 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 3224 nvlist_free(errors); 3225 errors = NULL; 3226 } else { 3227 VERIFY(nvpair_value_int32(pair, &rv) == 0); 3228 } 3229 3230 if (errlist == NULL) 3231 nvlist_free(errors); 3232 else 3233 *errlist = errors; 3234 3235 return (rv); 3236 } 3237 3238 static boolean_t 3239 propval_equals(nvpair_t *p1, nvpair_t *p2) 3240 { 3241 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 3242 /* dsl_prop_get_all_impl() format */ 3243 nvlist_t *attrs; 3244 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 3245 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3246 &p1) == 0); 3247 } 3248 3249 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 3250 nvlist_t *attrs; 3251 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 3252 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3253 &p2) == 0); 3254 } 3255 3256 if (nvpair_type(p1) != nvpair_type(p2)) 3257 return (B_FALSE); 3258 3259 if (nvpair_type(p1) == DATA_TYPE_STRING) { 3260 char *valstr1, *valstr2; 3261 3262 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 3263 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 3264 return (strcmp(valstr1, valstr2) == 0); 3265 } else { 3266 uint64_t intval1, intval2; 3267 3268 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 3269 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 3270 return (intval1 == intval2); 3271 } 3272 } 3273 3274 /* 3275 * Remove properties from props if they are not going to change (as determined 3276 * by comparison with origprops). Remove them from origprops as well, since we 3277 * do not need to clear or restore properties that won't change. 3278 */ 3279 static void 3280 props_reduce(nvlist_t *props, nvlist_t *origprops) 3281 { 3282 nvpair_t *pair, *next_pair; 3283 3284 if (origprops == NULL) 3285 return; /* all props need to be received */ 3286 3287 pair = nvlist_next_nvpair(props, NULL); 3288 while (pair != NULL) { 3289 const char *propname = nvpair_name(pair); 3290 nvpair_t *match; 3291 3292 next_pair = nvlist_next_nvpair(props, pair); 3293 3294 if ((nvlist_lookup_nvpair(origprops, propname, 3295 &match) != 0) || !propval_equals(pair, match)) 3296 goto next; /* need to set received value */ 3297 3298 /* don't clear the existing received value */ 3299 (void) nvlist_remove_nvpair(origprops, match); 3300 /* don't bother receiving the property */ 3301 (void) nvlist_remove_nvpair(props, pair); 3302 next: 3303 pair = next_pair; 3304 } 3305 } 3306 3307 #ifdef DEBUG 3308 static boolean_t zfs_ioc_recv_inject_err; 3309 #endif 3310 3311 /* 3312 * inputs: 3313 * zc_name name of containing filesystem 3314 * zc_nvlist_src{_size} nvlist of properties to apply 3315 * zc_value name of snapshot to create 3316 * zc_string name of clone origin (if DRR_FLAG_CLONE) 3317 * zc_cookie file descriptor to recv from 3318 * zc_begin_record the BEGIN record of the stream (not byteswapped) 3319 * zc_guid force flag 3320 * 3321 * outputs: 3322 * zc_cookie number of bytes read 3323 * zc_nvlist_dst{_size} error for each unapplied received property 3324 * zc_obj zprop_errflags_t 3325 */ 3326 static int 3327 zfs_ioc_recv(zfs_cmd_t *zc) 3328 { 3329 file_t *fp; 3330 objset_t *os; 3331 dmu_recv_cookie_t drc; 3332 boolean_t force = (boolean_t)zc->zc_guid; 3333 int fd; 3334 int error = 0; 3335 int props_error = 0; 3336 nvlist_t *errors; 3337 offset_t off; 3338 nvlist_t *props = NULL; /* sent properties */ 3339 nvlist_t *origprops = NULL; /* existing properties */ 3340 objset_t *origin = NULL; 3341 char *tosnap; 3342 char tofs[ZFS_MAXNAMELEN]; 3343 boolean_t first_recvd_props = B_FALSE; 3344 3345 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3346 strchr(zc->zc_value, '@') == NULL || 3347 strchr(zc->zc_value, '%')) 3348 return (EINVAL); 3349 3350 (void) strcpy(tofs, zc->zc_value); 3351 tosnap = strchr(tofs, '@'); 3352 *tosnap++ = '\0'; 3353 3354 if (zc->zc_nvlist_src != NULL && 3355 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 3356 zc->zc_iflags, &props)) != 0) 3357 return (error); 3358 3359 fd = zc->zc_cookie; 3360 fp = getf(fd); 3361 if (fp == NULL) { 3362 nvlist_free(props); 3363 return (EBADF); 3364 } 3365 3366 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3367 3368 if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) { 3369 if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) && 3370 !dsl_prop_get_hasrecvd(os)) { 3371 first_recvd_props = B_TRUE; 3372 } 3373 3374 /* 3375 * If new received properties are supplied, they are to 3376 * completely replace the existing received properties, so stash 3377 * away the existing ones. 3378 */ 3379 if (dsl_prop_get_received(os, &origprops) == 0) { 3380 nvlist_t *errlist = NULL; 3381 /* 3382 * Don't bother writing a property if its value won't 3383 * change (and avoid the unnecessary security checks). 3384 * 3385 * The first receive after SPA_VERSION_RECVD_PROPS is a 3386 * special case where we blow away all local properties 3387 * regardless. 3388 */ 3389 if (!first_recvd_props) 3390 props_reduce(props, origprops); 3391 if (zfs_check_clearable(tofs, origprops, 3392 &errlist) != 0) 3393 (void) nvlist_merge(errors, errlist, 0); 3394 nvlist_free(errlist); 3395 } 3396 3397 dmu_objset_rele(os, FTAG); 3398 } 3399 3400 if (zc->zc_string[0]) { 3401 error = dmu_objset_hold(zc->zc_string, FTAG, &origin); 3402 if (error) 3403 goto out; 3404 } 3405 3406 error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds, 3407 &zc->zc_begin_record, force, origin, &drc); 3408 if (origin) 3409 dmu_objset_rele(origin, FTAG); 3410 if (error) 3411 goto out; 3412 3413 /* 3414 * Set properties before we receive the stream so that they are applied 3415 * to the new data. Note that we must call dmu_recv_stream() if 3416 * dmu_recv_begin() succeeds. 3417 */ 3418 if (props) { 3419 nvlist_t *errlist; 3420 3421 if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) { 3422 if (drc.drc_newfs) { 3423 if (spa_version(os->os_spa) >= 3424 SPA_VERSION_RECVD_PROPS) 3425 first_recvd_props = B_TRUE; 3426 } else if (origprops != NULL) { 3427 if (clear_received_props(os, tofs, origprops, 3428 first_recvd_props ? NULL : props) != 0) 3429 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3430 } else { 3431 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3432 } 3433 dsl_prop_set_hasrecvd(os); 3434 } else if (!drc.drc_newfs) { 3435 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3436 } 3437 3438 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 3439 props, &errlist); 3440 (void) nvlist_merge(errors, errlist, 0); 3441 nvlist_free(errlist); 3442 } 3443 3444 if (fit_error_list(zc, &errors) != 0 || put_nvlist(zc, errors) != 0) { 3445 /* 3446 * Caller made zc->zc_nvlist_dst less than the minimum expected 3447 * size or supplied an invalid address. 3448 */ 3449 props_error = EINVAL; 3450 } 3451 3452 off = fp->f_offset; 3453 error = dmu_recv_stream(&drc, fp->f_vnode, &off); 3454 3455 if (error == 0) { 3456 zfsvfs_t *zfsvfs = NULL; 3457 3458 if (getzfsvfs(tofs, &zfsvfs) == 0) { 3459 /* online recv */ 3460 int end_err; 3461 3462 error = zfs_suspend_fs(zfsvfs); 3463 /* 3464 * If the suspend fails, then the recv_end will 3465 * likely also fail, and clean up after itself. 3466 */ 3467 end_err = dmu_recv_end(&drc); 3468 if (error == 0) { 3469 int resume_err = 3470 zfs_resume_fs(zfsvfs, tofs); 3471 error = error ? error : resume_err; 3472 } 3473 error = error ? error : end_err; 3474 VFS_RELE(zfsvfs->z_vfs); 3475 } else { 3476 error = dmu_recv_end(&drc); 3477 } 3478 } 3479 3480 zc->zc_cookie = off - fp->f_offset; 3481 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 3482 fp->f_offset = off; 3483 3484 #ifdef DEBUG 3485 if (zfs_ioc_recv_inject_err) { 3486 zfs_ioc_recv_inject_err = B_FALSE; 3487 error = 1; 3488 } 3489 #endif 3490 /* 3491 * On error, restore the original props. 3492 */ 3493 if (error && props) { 3494 if (dmu_objset_hold(tofs, FTAG, &os) == 0) { 3495 if (clear_received_props(os, tofs, props, NULL) != 0) { 3496 /* 3497 * We failed to clear the received properties. 3498 * Since we may have left a $recvd value on the 3499 * system, we can't clear the $hasrecvd flag. 3500 */ 3501 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3502 } else if (first_recvd_props) { 3503 dsl_prop_unset_hasrecvd(os); 3504 } 3505 dmu_objset_rele(os, FTAG); 3506 } else if (!drc.drc_newfs) { 3507 /* We failed to clear the received properties. */ 3508 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3509 } 3510 3511 if (origprops == NULL && !drc.drc_newfs) { 3512 /* We failed to stash the original properties. */ 3513 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3514 } 3515 3516 /* 3517 * dsl_props_set() will not convert RECEIVED to LOCAL on or 3518 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 3519 * explictly if we're restoring local properties cleared in the 3520 * first new-style receive. 3521 */ 3522 if (origprops != NULL && 3523 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 3524 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 3525 origprops, NULL) != 0) { 3526 /* 3527 * We stashed the original properties but failed to 3528 * restore them. 3529 */ 3530 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3531 } 3532 } 3533 out: 3534 nvlist_free(props); 3535 nvlist_free(origprops); 3536 nvlist_free(errors); 3537 releasef(fd); 3538 3539 if (error == 0) 3540 error = props_error; 3541 3542 return (error); 3543 } 3544 3545 /* 3546 * inputs: 3547 * zc_name name of snapshot to send 3548 * zc_value short name of incremental fromsnap (may be empty) 3549 * zc_cookie file descriptor to send stream to 3550 * zc_obj fromorigin flag (mutually exclusive with zc_value) 3551 * 3552 * outputs: none 3553 */ 3554 static int 3555 zfs_ioc_send(zfs_cmd_t *zc) 3556 { 3557 objset_t *fromsnap = NULL; 3558 objset_t *tosnap; 3559 file_t *fp; 3560 int error; 3561 offset_t off; 3562 3563 error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap); 3564 if (error) 3565 return (error); 3566 3567 if (zc->zc_value[0] != '\0') { 3568 char *buf; 3569 char *cp; 3570 3571 buf = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3572 (void) strncpy(buf, zc->zc_name, MAXPATHLEN); 3573 cp = strchr(buf, '@'); 3574 if (cp) 3575 *(cp+1) = 0; 3576 (void) strncat(buf, zc->zc_value, MAXPATHLEN); 3577 error = dmu_objset_hold(buf, FTAG, &fromsnap); 3578 kmem_free(buf, MAXPATHLEN); 3579 if (error) { 3580 dmu_objset_rele(tosnap, FTAG); 3581 return (error); 3582 } 3583 } 3584 3585 fp = getf(zc->zc_cookie); 3586 if (fp == NULL) { 3587 dmu_objset_rele(tosnap, FTAG); 3588 if (fromsnap) 3589 dmu_objset_rele(fromsnap, FTAG); 3590 return (EBADF); 3591 } 3592 3593 off = fp->f_offset; 3594 error = dmu_sendbackup(tosnap, fromsnap, zc->zc_obj, fp->f_vnode, &off); 3595 3596 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 3597 fp->f_offset = off; 3598 releasef(zc->zc_cookie); 3599 if (fromsnap) 3600 dmu_objset_rele(fromsnap, FTAG); 3601 dmu_objset_rele(tosnap, FTAG); 3602 return (error); 3603 } 3604 3605 static int 3606 zfs_ioc_inject_fault(zfs_cmd_t *zc) 3607 { 3608 int id, error; 3609 3610 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 3611 &zc->zc_inject_record); 3612 3613 if (error == 0) 3614 zc->zc_guid = (uint64_t)id; 3615 3616 return (error); 3617 } 3618 3619 static int 3620 zfs_ioc_clear_fault(zfs_cmd_t *zc) 3621 { 3622 return (zio_clear_fault((int)zc->zc_guid)); 3623 } 3624 3625 static int 3626 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 3627 { 3628 int id = (int)zc->zc_guid; 3629 int error; 3630 3631 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 3632 &zc->zc_inject_record); 3633 3634 zc->zc_guid = id; 3635 3636 return (error); 3637 } 3638 3639 static int 3640 zfs_ioc_error_log(zfs_cmd_t *zc) 3641 { 3642 spa_t *spa; 3643 int error; 3644 size_t count = (size_t)zc->zc_nvlist_dst_size; 3645 3646 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 3647 return (error); 3648 3649 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 3650 &count); 3651 if (error == 0) 3652 zc->zc_nvlist_dst_size = count; 3653 else 3654 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 3655 3656 spa_close(spa, FTAG); 3657 3658 return (error); 3659 } 3660 3661 static int 3662 zfs_ioc_clear(zfs_cmd_t *zc) 3663 { 3664 spa_t *spa; 3665 vdev_t *vd; 3666 int error; 3667 3668 /* 3669 * On zpool clear we also fix up missing slogs 3670 */ 3671 mutex_enter(&spa_namespace_lock); 3672 spa = spa_lookup(zc->zc_name); 3673 if (spa == NULL) { 3674 mutex_exit(&spa_namespace_lock); 3675 return (EIO); 3676 } 3677 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 3678 /* we need to let spa_open/spa_load clear the chains */ 3679 spa_set_log_state(spa, SPA_LOG_CLEAR); 3680 } 3681 spa->spa_last_open_failed = 0; 3682 mutex_exit(&spa_namespace_lock); 3683 3684 if (zc->zc_cookie == ZPOOL_NO_REWIND) { 3685 error = spa_open(zc->zc_name, &spa, FTAG); 3686 } else { 3687 nvlist_t *policy; 3688 nvlist_t *config = NULL; 3689 3690 if (zc->zc_nvlist_src == NULL) 3691 return (EINVAL); 3692 3693 if ((error = get_nvlist(zc->zc_nvlist_src, 3694 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 3695 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 3696 policy, &config); 3697 if (config != NULL) { 3698 (void) put_nvlist(zc, config); 3699 nvlist_free(config); 3700 } 3701 nvlist_free(policy); 3702 } 3703 } 3704 3705 if (error) 3706 return (error); 3707 3708 spa_vdev_state_enter(spa, SCL_NONE); 3709 3710 if (zc->zc_guid == 0) { 3711 vd = NULL; 3712 } else { 3713 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 3714 if (vd == NULL) { 3715 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 3716 spa_close(spa, FTAG); 3717 return (ENODEV); 3718 } 3719 } 3720 3721 vdev_clear(spa, vd); 3722 3723 (void) spa_vdev_state_exit(spa, NULL, 0); 3724 3725 /* 3726 * Resume any suspended I/Os. 3727 */ 3728 if (zio_resume(spa) != 0) 3729 error = EIO; 3730 3731 spa_close(spa, FTAG); 3732 3733 return (error); 3734 } 3735 3736 /* 3737 * inputs: 3738 * zc_name name of filesystem 3739 * zc_value name of origin snapshot 3740 * 3741 * outputs: 3742 * zc_string name of conflicting snapshot, if there is one 3743 */ 3744 static int 3745 zfs_ioc_promote(zfs_cmd_t *zc) 3746 { 3747 char *cp; 3748 3749 /* 3750 * We don't need to unmount *all* the origin fs's snapshots, but 3751 * it's easier. 3752 */ 3753 cp = strchr(zc->zc_value, '@'); 3754 if (cp) 3755 *cp = '\0'; 3756 (void) dmu_objset_find(zc->zc_value, 3757 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS); 3758 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 3759 } 3760 3761 /* 3762 * Retrieve a single {user|group}{used|quota}@... property. 3763 * 3764 * inputs: 3765 * zc_name name of filesystem 3766 * zc_objset_type zfs_userquota_prop_t 3767 * zc_value domain name (eg. "S-1-234-567-89") 3768 * zc_guid RID/UID/GID 3769 * 3770 * outputs: 3771 * zc_cookie property value 3772 */ 3773 static int 3774 zfs_ioc_userspace_one(zfs_cmd_t *zc) 3775 { 3776 zfsvfs_t *zfsvfs; 3777 int error; 3778 3779 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 3780 return (EINVAL); 3781 3782 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs); 3783 if (error) 3784 return (error); 3785 3786 error = zfs_userspace_one(zfsvfs, 3787 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 3788 zfsvfs_rele(zfsvfs, FTAG); 3789 3790 return (error); 3791 } 3792 3793 /* 3794 * inputs: 3795 * zc_name name of filesystem 3796 * zc_cookie zap cursor 3797 * zc_objset_type zfs_userquota_prop_t 3798 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 3799 * 3800 * outputs: 3801 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 3802 * zc_cookie zap cursor 3803 */ 3804 static int 3805 zfs_ioc_userspace_many(zfs_cmd_t *zc) 3806 { 3807 zfsvfs_t *zfsvfs; 3808 int error; 3809 3810 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs); 3811 if (error) 3812 return (error); 3813 3814 int bufsize = zc->zc_nvlist_dst_size; 3815 void *buf = kmem_alloc(bufsize, KM_SLEEP); 3816 3817 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 3818 buf, &zc->zc_nvlist_dst_size); 3819 3820 if (error == 0) { 3821 error = xcopyout(buf, 3822 (void *)(uintptr_t)zc->zc_nvlist_dst, 3823 zc->zc_nvlist_dst_size); 3824 } 3825 kmem_free(buf, bufsize); 3826 zfsvfs_rele(zfsvfs, FTAG); 3827 3828 return (error); 3829 } 3830 3831 /* 3832 * inputs: 3833 * zc_name name of filesystem 3834 * 3835 * outputs: 3836 * none 3837 */ 3838 static int 3839 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 3840 { 3841 objset_t *os; 3842 int error; 3843 zfsvfs_t *zfsvfs; 3844 3845 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 3846 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 3847 /* 3848 * If userused is not enabled, it may be because the 3849 * objset needs to be closed & reopened (to grow the 3850 * objset_phys_t). Suspend/resume the fs will do that. 3851 */ 3852 error = zfs_suspend_fs(zfsvfs); 3853 if (error == 0) 3854 error = zfs_resume_fs(zfsvfs, zc->zc_name); 3855 } 3856 if (error == 0) 3857 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 3858 VFS_RELE(zfsvfs->z_vfs); 3859 } else { 3860 /* XXX kind of reading contents without owning */ 3861 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 3862 if (error) 3863 return (error); 3864 3865 error = dmu_objset_userspace_upgrade(os); 3866 dmu_objset_rele(os, FTAG); 3867 } 3868 3869 return (error); 3870 } 3871 3872 /* 3873 * We don't want to have a hard dependency 3874 * against some special symbols in sharefs 3875 * nfs, and smbsrv. Determine them if needed when 3876 * the first file system is shared. 3877 * Neither sharefs, nfs or smbsrv are unloadable modules. 3878 */ 3879 int (*znfsexport_fs)(void *arg); 3880 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 3881 int (*zsmbexport_fs)(void *arg, boolean_t add_share); 3882 3883 int zfs_nfsshare_inited; 3884 int zfs_smbshare_inited; 3885 3886 ddi_modhandle_t nfs_mod; 3887 ddi_modhandle_t sharefs_mod; 3888 ddi_modhandle_t smbsrv_mod; 3889 kmutex_t zfs_share_lock; 3890 3891 static int 3892 zfs_init_sharefs() 3893 { 3894 int error; 3895 3896 ASSERT(MUTEX_HELD(&zfs_share_lock)); 3897 /* Both NFS and SMB shares also require sharetab support. */ 3898 if (sharefs_mod == NULL && ((sharefs_mod = 3899 ddi_modopen("fs/sharefs", 3900 KRTLD_MODE_FIRST, &error)) == NULL)) { 3901 return (ENOSYS); 3902 } 3903 if (zshare_fs == NULL && ((zshare_fs = 3904 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 3905 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 3906 return (ENOSYS); 3907 } 3908 return (0); 3909 } 3910 3911 static int 3912 zfs_ioc_share(zfs_cmd_t *zc) 3913 { 3914 int error; 3915 int opcode; 3916 3917 switch (zc->zc_share.z_sharetype) { 3918 case ZFS_SHARE_NFS: 3919 case ZFS_UNSHARE_NFS: 3920 if (zfs_nfsshare_inited == 0) { 3921 mutex_enter(&zfs_share_lock); 3922 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 3923 KRTLD_MODE_FIRST, &error)) == NULL)) { 3924 mutex_exit(&zfs_share_lock); 3925 return (ENOSYS); 3926 } 3927 if (znfsexport_fs == NULL && 3928 ((znfsexport_fs = (int (*)(void *)) 3929 ddi_modsym(nfs_mod, 3930 "nfs_export", &error)) == NULL)) { 3931 mutex_exit(&zfs_share_lock); 3932 return (ENOSYS); 3933 } 3934 error = zfs_init_sharefs(); 3935 if (error) { 3936 mutex_exit(&zfs_share_lock); 3937 return (ENOSYS); 3938 } 3939 zfs_nfsshare_inited = 1; 3940 mutex_exit(&zfs_share_lock); 3941 } 3942 break; 3943 case ZFS_SHARE_SMB: 3944 case ZFS_UNSHARE_SMB: 3945 if (zfs_smbshare_inited == 0) { 3946 mutex_enter(&zfs_share_lock); 3947 if (smbsrv_mod == NULL && ((smbsrv_mod = 3948 ddi_modopen("drv/smbsrv", 3949 KRTLD_MODE_FIRST, &error)) == NULL)) { 3950 mutex_exit(&zfs_share_lock); 3951 return (ENOSYS); 3952 } 3953 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 3954 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 3955 "smb_server_share", &error)) == NULL)) { 3956 mutex_exit(&zfs_share_lock); 3957 return (ENOSYS); 3958 } 3959 error = zfs_init_sharefs(); 3960 if (error) { 3961 mutex_exit(&zfs_share_lock); 3962 return (ENOSYS); 3963 } 3964 zfs_smbshare_inited = 1; 3965 mutex_exit(&zfs_share_lock); 3966 } 3967 break; 3968 default: 3969 return (EINVAL); 3970 } 3971 3972 switch (zc->zc_share.z_sharetype) { 3973 case ZFS_SHARE_NFS: 3974 case ZFS_UNSHARE_NFS: 3975 if (error = 3976 znfsexport_fs((void *) 3977 (uintptr_t)zc->zc_share.z_exportdata)) 3978 return (error); 3979 break; 3980 case ZFS_SHARE_SMB: 3981 case ZFS_UNSHARE_SMB: 3982 if (error = zsmbexport_fs((void *) 3983 (uintptr_t)zc->zc_share.z_exportdata, 3984 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 3985 B_TRUE: B_FALSE)) { 3986 return (error); 3987 } 3988 break; 3989 } 3990 3991 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 3992 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 3993 SHAREFS_ADD : SHAREFS_REMOVE; 3994 3995 /* 3996 * Add or remove share from sharetab 3997 */ 3998 error = zshare_fs(opcode, 3999 (void *)(uintptr_t)zc->zc_share.z_sharedata, 4000 zc->zc_share.z_sharemax); 4001 4002 return (error); 4003 4004 } 4005 4006 ace_t full_access[] = { 4007 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 4008 }; 4009 4010 /* 4011 * Remove all ACL files in shares dir 4012 */ 4013 static int 4014 zfs_smb_acl_purge(znode_t *dzp) 4015 { 4016 zap_cursor_t zc; 4017 zap_attribute_t zap; 4018 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 4019 int error; 4020 4021 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 4022 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 4023 zap_cursor_advance(&zc)) { 4024 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 4025 NULL, 0)) != 0) 4026 break; 4027 } 4028 zap_cursor_fini(&zc); 4029 return (error); 4030 } 4031 4032 static int 4033 zfs_ioc_smb_acl(zfs_cmd_t *zc) 4034 { 4035 vnode_t *vp; 4036 znode_t *dzp; 4037 vnode_t *resourcevp = NULL; 4038 znode_t *sharedir; 4039 zfsvfs_t *zfsvfs; 4040 nvlist_t *nvlist; 4041 char *src, *target; 4042 vattr_t vattr; 4043 vsecattr_t vsec; 4044 int error = 0; 4045 4046 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 4047 NO_FOLLOW, NULL, &vp)) != 0) 4048 return (error); 4049 4050 /* Now make sure mntpnt and dataset are ZFS */ 4051 4052 if (vp->v_vfsp->vfs_fstype != zfsfstype || 4053 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 4054 zc->zc_name) != 0)) { 4055 VN_RELE(vp); 4056 return (EINVAL); 4057 } 4058 4059 dzp = VTOZ(vp); 4060 zfsvfs = dzp->z_zfsvfs; 4061 ZFS_ENTER(zfsvfs); 4062 4063 /* 4064 * Create share dir if its missing. 4065 */ 4066 mutex_enter(&zfsvfs->z_lock); 4067 if (zfsvfs->z_shares_dir == 0) { 4068 dmu_tx_t *tx; 4069 4070 tx = dmu_tx_create(zfsvfs->z_os); 4071 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 4072 ZFS_SHARES_DIR); 4073 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 4074 error = dmu_tx_assign(tx, TXG_WAIT); 4075 if (error) { 4076 dmu_tx_abort(tx); 4077 } else { 4078 error = zfs_create_share_dir(zfsvfs, tx); 4079 dmu_tx_commit(tx); 4080 } 4081 if (error) { 4082 mutex_exit(&zfsvfs->z_lock); 4083 VN_RELE(vp); 4084 ZFS_EXIT(zfsvfs); 4085 return (error); 4086 } 4087 } 4088 mutex_exit(&zfsvfs->z_lock); 4089 4090 ASSERT(zfsvfs->z_shares_dir); 4091 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 4092 VN_RELE(vp); 4093 ZFS_EXIT(zfsvfs); 4094 return (error); 4095 } 4096 4097 switch (zc->zc_cookie) { 4098 case ZFS_SMB_ACL_ADD: 4099 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 4100 vattr.va_type = VREG; 4101 vattr.va_mode = S_IFREG|0777; 4102 vattr.va_uid = 0; 4103 vattr.va_gid = 0; 4104 4105 vsec.vsa_mask = VSA_ACE; 4106 vsec.vsa_aclentp = &full_access; 4107 vsec.vsa_aclentsz = sizeof (full_access); 4108 vsec.vsa_aclcnt = 1; 4109 4110 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 4111 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 4112 if (resourcevp) 4113 VN_RELE(resourcevp); 4114 break; 4115 4116 case ZFS_SMB_ACL_REMOVE: 4117 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 4118 NULL, 0); 4119 break; 4120 4121 case ZFS_SMB_ACL_RENAME: 4122 if ((error = get_nvlist(zc->zc_nvlist_src, 4123 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 4124 VN_RELE(vp); 4125 ZFS_EXIT(zfsvfs); 4126 return (error); 4127 } 4128 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 4129 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 4130 &target)) { 4131 VN_RELE(vp); 4132 VN_RELE(ZTOV(sharedir)); 4133 ZFS_EXIT(zfsvfs); 4134 return (error); 4135 } 4136 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 4137 kcred, NULL, 0); 4138 nvlist_free(nvlist); 4139 break; 4140 4141 case ZFS_SMB_ACL_PURGE: 4142 error = zfs_smb_acl_purge(sharedir); 4143 break; 4144 4145 default: 4146 error = EINVAL; 4147 break; 4148 } 4149 4150 VN_RELE(vp); 4151 VN_RELE(ZTOV(sharedir)); 4152 4153 ZFS_EXIT(zfsvfs); 4154 4155 return (error); 4156 } 4157 4158 /* 4159 * inputs: 4160 * zc_name name of filesystem 4161 * zc_value short name of snap 4162 * zc_string user-supplied tag for this reference 4163 * zc_cookie recursive flag 4164 * zc_temphold set if hold is temporary 4165 * 4166 * outputs: none 4167 */ 4168 static int 4169 zfs_ioc_hold(zfs_cmd_t *zc) 4170 { 4171 boolean_t recursive = zc->zc_cookie; 4172 4173 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 4174 return (EINVAL); 4175 4176 return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value, 4177 zc->zc_string, recursive, zc->zc_temphold)); 4178 } 4179 4180 /* 4181 * inputs: 4182 * zc_name name of dataset from which we're releasing a user reference 4183 * zc_value short name of snap 4184 * zc_string user-supplied tag for this reference 4185 * zc_cookie recursive flag 4186 * 4187 * outputs: none 4188 */ 4189 static int 4190 zfs_ioc_release(zfs_cmd_t *zc) 4191 { 4192 boolean_t recursive = zc->zc_cookie; 4193 4194 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 4195 return (EINVAL); 4196 4197 return (dsl_dataset_user_release(zc->zc_name, zc->zc_value, 4198 zc->zc_string, recursive)); 4199 } 4200 4201 /* 4202 * inputs: 4203 * zc_name name of filesystem 4204 * 4205 * outputs: 4206 * zc_nvlist_src{_size} nvlist of snapshot holds 4207 */ 4208 static int 4209 zfs_ioc_get_holds(zfs_cmd_t *zc) 4210 { 4211 nvlist_t *nvp; 4212 int error; 4213 4214 if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) { 4215 error = put_nvlist(zc, nvp); 4216 nvlist_free(nvp); 4217 } 4218 4219 return (error); 4220 } 4221 4222 /* 4223 * pool create, destroy, and export don't log the history as part of 4224 * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export 4225 * do the logging of those commands. 4226 */ 4227 static zfs_ioc_vec_t zfs_ioc_vec[] = { 4228 { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4229 B_FALSE }, 4230 { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4231 B_FALSE }, 4232 { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4233 B_FALSE }, 4234 { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4235 B_FALSE }, 4236 { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE, 4237 B_FALSE }, 4238 { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE, 4239 B_FALSE }, 4240 { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE, 4241 B_FALSE }, 4242 { zfs_ioc_pool_scrub, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4243 B_TRUE }, 4244 { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE, 4245 B_FALSE }, 4246 { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4247 B_TRUE }, 4248 { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4249 B_FALSE }, 4250 { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4251 B_TRUE }, 4252 { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4253 B_TRUE }, 4254 { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4255 B_FALSE }, 4256 { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4257 B_TRUE }, 4258 { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4259 B_TRUE }, 4260 { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4261 B_TRUE }, 4262 { zfs_ioc_vdev_setfru, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4263 B_TRUE }, 4264 { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4265 B_FALSE }, 4266 { zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4267 B_FALSE }, 4268 { zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4269 B_FALSE }, 4270 { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4271 B_FALSE }, 4272 { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE, B_TRUE }, 4273 { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE, B_TRUE }, 4274 { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE, 4275 B_TRUE}, 4276 { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE, 4277 B_TRUE }, 4278 { zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE, B_TRUE }, 4279 { zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE, B_TRUE }, 4280 { zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE, B_FALSE }, 4281 { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4282 B_FALSE }, 4283 { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4284 B_FALSE }, 4285 { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4286 B_FALSE }, 4287 { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE, 4288 B_FALSE }, 4289 { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE, B_FALSE }, 4290 { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE, 4291 B_TRUE }, 4292 { zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, DATASET_NAME, 4293 B_TRUE, B_TRUE }, 4294 { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE, 4295 B_TRUE }, 4296 { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4297 B_FALSE }, 4298 { zfs_ioc_obj_to_path, zfs_secpolicy_config, DATASET_NAME, B_FALSE, 4299 B_TRUE }, 4300 { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4301 B_TRUE }, 4302 { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE, 4303 B_FALSE }, 4304 { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE, 4305 B_TRUE }, 4306 { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4307 B_FALSE }, 4308 { zfs_ioc_iscsi_perm_check, zfs_secpolicy_iscsi, DATASET_NAME, B_FALSE, 4309 B_FALSE }, 4310 { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE, B_FALSE }, 4311 { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE, 4312 B_TRUE }, 4313 { zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE, 4314 B_FALSE }, 4315 { zfs_ioc_userspace_one, zfs_secpolicy_userspace_one, 4316 DATASET_NAME, B_FALSE, B_FALSE }, 4317 { zfs_ioc_userspace_many, zfs_secpolicy_userspace_many, 4318 DATASET_NAME, B_FALSE, B_FALSE }, 4319 { zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 4320 DATASET_NAME, B_FALSE, B_TRUE }, 4321 { zfs_ioc_hold, zfs_secpolicy_hold, DATASET_NAME, B_TRUE, B_TRUE }, 4322 { zfs_ioc_release, zfs_secpolicy_release, DATASET_NAME, B_TRUE, 4323 B_TRUE }, 4324 { zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4325 B_TRUE }, 4326 { zfs_ioc_objset_recvd_props, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4327 B_FALSE } 4328 }; 4329 4330 int 4331 pool_status_check(const char *name, zfs_ioc_namecheck_t type) 4332 { 4333 spa_t *spa; 4334 int error; 4335 4336 ASSERT(type == POOL_NAME || type == DATASET_NAME); 4337 4338 error = spa_open(name, &spa, FTAG); 4339 if (error == 0) { 4340 if (spa_suspended(spa)) 4341 error = EAGAIN; 4342 spa_close(spa, FTAG); 4343 } 4344 return (error); 4345 } 4346 4347 static int 4348 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 4349 { 4350 zfs_cmd_t *zc; 4351 uint_t vec; 4352 int error, rc; 4353 4354 if (getminor(dev) != 0) 4355 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 4356 4357 vec = cmd - ZFS_IOC; 4358 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 4359 4360 if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 4361 return (EINVAL); 4362 4363 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 4364 4365 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 4366 4367 if ((error == 0) && !(flag & FKIOCTL)) 4368 error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr); 4369 4370 /* 4371 * Ensure that all pool/dataset names are valid before we pass down to 4372 * the lower layers. 4373 */ 4374 if (error == 0) { 4375 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 4376 zc->zc_iflags = flag & FKIOCTL; 4377 switch (zfs_ioc_vec[vec].zvec_namecheck) { 4378 case POOL_NAME: 4379 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 4380 error = EINVAL; 4381 if (zfs_ioc_vec[vec].zvec_pool_check) 4382 error = pool_status_check(zc->zc_name, 4383 zfs_ioc_vec[vec].zvec_namecheck); 4384 break; 4385 4386 case DATASET_NAME: 4387 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 4388 error = EINVAL; 4389 if (zfs_ioc_vec[vec].zvec_pool_check) 4390 error = pool_status_check(zc->zc_name, 4391 zfs_ioc_vec[vec].zvec_namecheck); 4392 break; 4393 4394 case NO_NAME: 4395 break; 4396 } 4397 } 4398 4399 if (error == 0) 4400 error = zfs_ioc_vec[vec].zvec_func(zc); 4401 4402 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 4403 if (error == 0) { 4404 error = rc; 4405 if (zfs_ioc_vec[vec].zvec_his_log) 4406 zfs_log_history(zc); 4407 } 4408 4409 kmem_free(zc, sizeof (zfs_cmd_t)); 4410 return (error); 4411 } 4412 4413 static int 4414 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 4415 { 4416 if (cmd != DDI_ATTACH) 4417 return (DDI_FAILURE); 4418 4419 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 4420 DDI_PSEUDO, 0) == DDI_FAILURE) 4421 return (DDI_FAILURE); 4422 4423 zfs_dip = dip; 4424 4425 ddi_report_dev(dip); 4426 4427 return (DDI_SUCCESS); 4428 } 4429 4430 static int 4431 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 4432 { 4433 if (spa_busy() || zfs_busy() || zvol_busy()) 4434 return (DDI_FAILURE); 4435 4436 if (cmd != DDI_DETACH) 4437 return (DDI_FAILURE); 4438 4439 zfs_dip = NULL; 4440 4441 ddi_prop_remove_all(dip); 4442 ddi_remove_minor_node(dip, NULL); 4443 4444 return (DDI_SUCCESS); 4445 } 4446 4447 /*ARGSUSED*/ 4448 static int 4449 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 4450 { 4451 switch (infocmd) { 4452 case DDI_INFO_DEVT2DEVINFO: 4453 *result = zfs_dip; 4454 return (DDI_SUCCESS); 4455 4456 case DDI_INFO_DEVT2INSTANCE: 4457 *result = (void *)0; 4458 return (DDI_SUCCESS); 4459 } 4460 4461 return (DDI_FAILURE); 4462 } 4463 4464 /* 4465 * OK, so this is a little weird. 4466 * 4467 * /dev/zfs is the control node, i.e. minor 0. 4468 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 4469 * 4470 * /dev/zfs has basically nothing to do except serve up ioctls, 4471 * so most of the standard driver entry points are in zvol.c. 4472 */ 4473 static struct cb_ops zfs_cb_ops = { 4474 zvol_open, /* open */ 4475 zvol_close, /* close */ 4476 zvol_strategy, /* strategy */ 4477 nodev, /* print */ 4478 zvol_dump, /* dump */ 4479 zvol_read, /* read */ 4480 zvol_write, /* write */ 4481 zfsdev_ioctl, /* ioctl */ 4482 nodev, /* devmap */ 4483 nodev, /* mmap */ 4484 nodev, /* segmap */ 4485 nochpoll, /* poll */ 4486 ddi_prop_op, /* prop_op */ 4487 NULL, /* streamtab */ 4488 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 4489 CB_REV, /* version */ 4490 nodev, /* async read */ 4491 nodev, /* async write */ 4492 }; 4493 4494 static struct dev_ops zfs_dev_ops = { 4495 DEVO_REV, /* version */ 4496 0, /* refcnt */ 4497 zfs_info, /* info */ 4498 nulldev, /* identify */ 4499 nulldev, /* probe */ 4500 zfs_attach, /* attach */ 4501 zfs_detach, /* detach */ 4502 nodev, /* reset */ 4503 &zfs_cb_ops, /* driver operations */ 4504 NULL, /* no bus operations */ 4505 NULL, /* power */ 4506 ddi_quiesce_not_needed, /* quiesce */ 4507 }; 4508 4509 static struct modldrv zfs_modldrv = { 4510 &mod_driverops, 4511 "ZFS storage pool", 4512 &zfs_dev_ops 4513 }; 4514 4515 static struct modlinkage modlinkage = { 4516 MODREV_1, 4517 (void *)&zfs_modlfs, 4518 (void *)&zfs_modldrv, 4519 NULL 4520 }; 4521 4522 4523 uint_t zfs_fsyncer_key; 4524 extern uint_t rrw_tsd_key; 4525 4526 int 4527 _init(void) 4528 { 4529 int error; 4530 4531 spa_init(FREAD | FWRITE); 4532 zfs_init(); 4533 zvol_init(); 4534 4535 if ((error = mod_install(&modlinkage)) != 0) { 4536 zvol_fini(); 4537 zfs_fini(); 4538 spa_fini(); 4539 return (error); 4540 } 4541 4542 tsd_create(&zfs_fsyncer_key, NULL); 4543 tsd_create(&rrw_tsd_key, NULL); 4544 4545 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 4546 ASSERT(error == 0); 4547 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 4548 4549 return (0); 4550 } 4551 4552 int 4553 _fini(void) 4554 { 4555 int error; 4556 4557 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 4558 return (EBUSY); 4559 4560 if ((error = mod_remove(&modlinkage)) != 0) 4561 return (error); 4562 4563 zvol_fini(); 4564 zfs_fini(); 4565 spa_fini(); 4566 if (zfs_nfsshare_inited) 4567 (void) ddi_modclose(nfs_mod); 4568 if (zfs_smbshare_inited) 4569 (void) ddi_modclose(smbsrv_mod); 4570 if (zfs_nfsshare_inited || zfs_smbshare_inited) 4571 (void) ddi_modclose(sharefs_mod); 4572 4573 tsd_destroy(&zfs_fsyncer_key); 4574 ldi_ident_release(zfs_li); 4575 zfs_li = NULL; 4576 mutex_destroy(&zfs_share_lock); 4577 4578 return (error); 4579 } 4580 4581 int 4582 _info(struct modinfo *modinfop) 4583 { 4584 return (mod_info(&modlinkage, modinfop)); 4585 } 4586