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 2010 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 int 629 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 630 { 631 char parentname[MAXNAMELEN]; 632 int error; 633 634 if ((error = zfs_secpolicy_write_perms(from, 635 ZFS_DELEG_PERM_RENAME, cr)) != 0) 636 return (error); 637 638 if ((error = zfs_secpolicy_write_perms(from, 639 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 640 return (error); 641 642 if ((error = zfs_get_parent(to, parentname, 643 sizeof (parentname))) != 0) 644 return (error); 645 646 if ((error = zfs_secpolicy_write_perms(parentname, 647 ZFS_DELEG_PERM_CREATE, cr)) != 0) 648 return (error); 649 650 if ((error = zfs_secpolicy_write_perms(parentname, 651 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 652 return (error); 653 654 return (error); 655 } 656 657 static int 658 zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr) 659 { 660 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); 661 } 662 663 static int 664 zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr) 665 { 666 char parentname[MAXNAMELEN]; 667 objset_t *clone; 668 int error; 669 670 error = zfs_secpolicy_write_perms(zc->zc_name, 671 ZFS_DELEG_PERM_PROMOTE, cr); 672 if (error) 673 return (error); 674 675 error = dmu_objset_hold(zc->zc_name, FTAG, &clone); 676 677 if (error == 0) { 678 dsl_dataset_t *pclone = NULL; 679 dsl_dir_t *dd; 680 dd = clone->os_dsl_dataset->ds_dir; 681 682 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); 683 error = dsl_dataset_hold_obj(dd->dd_pool, 684 dd->dd_phys->dd_origin_obj, FTAG, &pclone); 685 rw_exit(&dd->dd_pool->dp_config_rwlock); 686 if (error) { 687 dmu_objset_rele(clone, FTAG); 688 return (error); 689 } 690 691 error = zfs_secpolicy_write_perms(zc->zc_name, 692 ZFS_DELEG_PERM_MOUNT, cr); 693 694 dsl_dataset_name(pclone, parentname); 695 dmu_objset_rele(clone, FTAG); 696 dsl_dataset_rele(pclone, FTAG); 697 if (error == 0) 698 error = zfs_secpolicy_write_perms(parentname, 699 ZFS_DELEG_PERM_PROMOTE, cr); 700 } 701 return (error); 702 } 703 704 static int 705 zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr) 706 { 707 int error; 708 709 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 710 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 711 return (error); 712 713 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 714 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 715 return (error); 716 717 return (zfs_secpolicy_write_perms(zc->zc_name, 718 ZFS_DELEG_PERM_CREATE, cr)); 719 } 720 721 int 722 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 723 { 724 return (zfs_secpolicy_write_perms(name, 725 ZFS_DELEG_PERM_SNAPSHOT, cr)); 726 } 727 728 static int 729 zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr) 730 { 731 732 return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr)); 733 } 734 735 static int 736 zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr) 737 { 738 char parentname[MAXNAMELEN]; 739 int error; 740 741 if ((error = zfs_get_parent(zc->zc_name, parentname, 742 sizeof (parentname))) != 0) 743 return (error); 744 745 if (zc->zc_value[0] != '\0') { 746 if ((error = zfs_secpolicy_write_perms(zc->zc_value, 747 ZFS_DELEG_PERM_CLONE, cr)) != 0) 748 return (error); 749 } 750 751 if ((error = zfs_secpolicy_write_perms(parentname, 752 ZFS_DELEG_PERM_CREATE, cr)) != 0) 753 return (error); 754 755 error = zfs_secpolicy_write_perms(parentname, 756 ZFS_DELEG_PERM_MOUNT, cr); 757 758 return (error); 759 } 760 761 static int 762 zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr) 763 { 764 int error; 765 766 error = secpolicy_fs_unmount(cr, NULL); 767 if (error) { 768 error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr); 769 } 770 return (error); 771 } 772 773 /* 774 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 775 * SYS_CONFIG privilege, which is not available in a local zone. 776 */ 777 /* ARGSUSED */ 778 static int 779 zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr) 780 { 781 if (secpolicy_sys_config(cr, B_FALSE) != 0) 782 return (EPERM); 783 784 return (0); 785 } 786 787 /* 788 * Policy for fault injection. Requires all privileges. 789 */ 790 /* ARGSUSED */ 791 static int 792 zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr) 793 { 794 return (secpolicy_zinject(cr)); 795 } 796 797 static int 798 zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr) 799 { 800 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 801 802 if (prop == ZPROP_INVAL) { 803 if (!zfs_prop_user(zc->zc_value)) 804 return (EINVAL); 805 return (zfs_secpolicy_write_perms(zc->zc_name, 806 ZFS_DELEG_PERM_USERPROP, cr)); 807 } else { 808 return (zfs_secpolicy_setprop(zc->zc_name, prop, 809 NULL, cr)); 810 } 811 } 812 813 static int 814 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, cred_t *cr) 815 { 816 int err = zfs_secpolicy_read(zc, cr); 817 if (err) 818 return (err); 819 820 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 821 return (EINVAL); 822 823 if (zc->zc_value[0] == 0) { 824 /* 825 * They are asking about a posix uid/gid. If it's 826 * themself, allow it. 827 */ 828 if (zc->zc_objset_type == ZFS_PROP_USERUSED || 829 zc->zc_objset_type == ZFS_PROP_USERQUOTA) { 830 if (zc->zc_guid == crgetuid(cr)) 831 return (0); 832 } else { 833 if (groupmember(zc->zc_guid, cr)) 834 return (0); 835 } 836 } 837 838 return (zfs_secpolicy_write_perms(zc->zc_name, 839 userquota_perms[zc->zc_objset_type], cr)); 840 } 841 842 static int 843 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, cred_t *cr) 844 { 845 int err = zfs_secpolicy_read(zc, cr); 846 if (err) 847 return (err); 848 849 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 850 return (EINVAL); 851 852 return (zfs_secpolicy_write_perms(zc->zc_name, 853 userquota_perms[zc->zc_objset_type], cr)); 854 } 855 856 static int 857 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, cred_t *cr) 858 { 859 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, 860 NULL, cr)); 861 } 862 863 static int 864 zfs_secpolicy_hold(zfs_cmd_t *zc, cred_t *cr) 865 { 866 return (zfs_secpolicy_write_perms(zc->zc_name, 867 ZFS_DELEG_PERM_HOLD, cr)); 868 } 869 870 static int 871 zfs_secpolicy_release(zfs_cmd_t *zc, cred_t *cr) 872 { 873 return (zfs_secpolicy_write_perms(zc->zc_name, 874 ZFS_DELEG_PERM_RELEASE, cr)); 875 } 876 877 /* 878 * Returns the nvlist as specified by the user in the zfs_cmd_t. 879 */ 880 static int 881 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) 882 { 883 char *packed; 884 int error; 885 nvlist_t *list = NULL; 886 887 /* 888 * Read in and unpack the user-supplied nvlist. 889 */ 890 if (size == 0) 891 return (EINVAL); 892 893 packed = kmem_alloc(size, KM_SLEEP); 894 895 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, 896 iflag)) != 0) { 897 kmem_free(packed, size); 898 return (error); 899 } 900 901 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 902 kmem_free(packed, size); 903 return (error); 904 } 905 906 kmem_free(packed, size); 907 908 *nvp = list; 909 return (0); 910 } 911 912 static int 913 fit_error_list(zfs_cmd_t *zc, nvlist_t **errors) 914 { 915 size_t size; 916 917 VERIFY(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0); 918 919 if (size > zc->zc_nvlist_dst_size) { 920 nvpair_t *more_errors; 921 int n = 0; 922 923 if (zc->zc_nvlist_dst_size < 1024) 924 return (ENOMEM); 925 926 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, 0) == 0); 927 more_errors = nvlist_prev_nvpair(*errors, NULL); 928 929 do { 930 nvpair_t *pair = nvlist_prev_nvpair(*errors, 931 more_errors); 932 VERIFY(nvlist_remove_nvpair(*errors, pair) == 0); 933 n++; 934 VERIFY(nvlist_size(*errors, &size, 935 NV_ENCODE_NATIVE) == 0); 936 } while (size > zc->zc_nvlist_dst_size); 937 938 VERIFY(nvlist_remove_nvpair(*errors, more_errors) == 0); 939 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, n) == 0); 940 ASSERT(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0); 941 ASSERT(size <= zc->zc_nvlist_dst_size); 942 } 943 944 return (0); 945 } 946 947 static int 948 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 949 { 950 char *packed = NULL; 951 int error = 0; 952 size_t size; 953 954 VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0); 955 956 if (size > zc->zc_nvlist_dst_size) { 957 error = ENOMEM; 958 } else { 959 packed = kmem_alloc(size, KM_SLEEP); 960 VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE, 961 KM_SLEEP) == 0); 962 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 963 size, zc->zc_iflags) != 0) 964 error = EFAULT; 965 kmem_free(packed, size); 966 } 967 968 zc->zc_nvlist_dst_size = size; 969 return (error); 970 } 971 972 static int 973 getzfsvfs(const char *dsname, zfsvfs_t **zfvp) 974 { 975 objset_t *os; 976 int error; 977 978 error = dmu_objset_hold(dsname, FTAG, &os); 979 if (error) 980 return (error); 981 if (dmu_objset_type(os) != DMU_OST_ZFS) { 982 dmu_objset_rele(os, FTAG); 983 return (EINVAL); 984 } 985 986 mutex_enter(&os->os_user_ptr_lock); 987 *zfvp = dmu_objset_get_user(os); 988 if (*zfvp) { 989 VFS_HOLD((*zfvp)->z_vfs); 990 } else { 991 error = ESRCH; 992 } 993 mutex_exit(&os->os_user_ptr_lock); 994 dmu_objset_rele(os, FTAG); 995 return (error); 996 } 997 998 /* 999 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which 1000 * case its z_vfs will be NULL, and it will be opened as the owner. 1001 */ 1002 static int 1003 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp) 1004 { 1005 int error = 0; 1006 1007 if (getzfsvfs(name, zfvp) != 0) 1008 error = zfsvfs_create(name, zfvp); 1009 if (error == 0) { 1010 rrw_enter(&(*zfvp)->z_teardown_lock, RW_READER, tag); 1011 if ((*zfvp)->z_unmounted) { 1012 /* 1013 * XXX we could probably try again, since the unmounting 1014 * thread should be just about to disassociate the 1015 * objset from the zfsvfs. 1016 */ 1017 rrw_exit(&(*zfvp)->z_teardown_lock, tag); 1018 return (EBUSY); 1019 } 1020 } 1021 return (error); 1022 } 1023 1024 static void 1025 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) 1026 { 1027 rrw_exit(&zfsvfs->z_teardown_lock, tag); 1028 1029 if (zfsvfs->z_vfs) { 1030 VFS_RELE(zfsvfs->z_vfs); 1031 } else { 1032 dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1033 zfsvfs_free(zfsvfs); 1034 } 1035 } 1036 1037 static int 1038 zfs_ioc_pool_create(zfs_cmd_t *zc) 1039 { 1040 int error; 1041 nvlist_t *config, *props = NULL; 1042 nvlist_t *rootprops = NULL; 1043 nvlist_t *zplprops = NULL; 1044 char *buf; 1045 1046 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1047 zc->zc_iflags, &config)) 1048 return (error); 1049 1050 if (zc->zc_nvlist_src_size != 0 && (error = 1051 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1052 zc->zc_iflags, &props))) { 1053 nvlist_free(config); 1054 return (error); 1055 } 1056 1057 if (props) { 1058 nvlist_t *nvl = NULL; 1059 uint64_t version = SPA_VERSION; 1060 1061 (void) nvlist_lookup_uint64(props, 1062 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); 1063 if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) { 1064 error = EINVAL; 1065 goto pool_props_bad; 1066 } 1067 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); 1068 if (nvl) { 1069 error = nvlist_dup(nvl, &rootprops, KM_SLEEP); 1070 if (error != 0) { 1071 nvlist_free(config); 1072 nvlist_free(props); 1073 return (error); 1074 } 1075 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); 1076 } 1077 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1078 error = zfs_fill_zplprops_root(version, rootprops, 1079 zplprops, NULL); 1080 if (error) 1081 goto pool_props_bad; 1082 } 1083 1084 buf = history_str_get(zc); 1085 1086 error = spa_create(zc->zc_name, config, props, buf, zplprops); 1087 1088 /* 1089 * Set the remaining root properties 1090 */ 1091 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, 1092 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) 1093 (void) spa_destroy(zc->zc_name); 1094 1095 if (buf != NULL) 1096 history_str_free(buf); 1097 1098 pool_props_bad: 1099 nvlist_free(rootprops); 1100 nvlist_free(zplprops); 1101 nvlist_free(config); 1102 nvlist_free(props); 1103 1104 return (error); 1105 } 1106 1107 static int 1108 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 1109 { 1110 int error; 1111 zfs_log_history(zc); 1112 error = spa_destroy(zc->zc_name); 1113 if (error == 0) 1114 zvol_remove_minors(zc->zc_name); 1115 return (error); 1116 } 1117 1118 static int 1119 zfs_ioc_pool_import(zfs_cmd_t *zc) 1120 { 1121 nvlist_t *config, *props = NULL; 1122 uint64_t guid; 1123 int error; 1124 1125 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1126 zc->zc_iflags, &config)) != 0) 1127 return (error); 1128 1129 if (zc->zc_nvlist_src_size != 0 && (error = 1130 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1131 zc->zc_iflags, &props))) { 1132 nvlist_free(config); 1133 return (error); 1134 } 1135 1136 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1137 guid != zc->zc_guid) 1138 error = EINVAL; 1139 else if (zc->zc_cookie) 1140 error = spa_import_verbatim(zc->zc_name, config, props); 1141 else 1142 error = spa_import(zc->zc_name, config, props); 1143 1144 if (zc->zc_nvlist_dst != 0) 1145 (void) put_nvlist(zc, config); 1146 1147 nvlist_free(config); 1148 1149 if (props) 1150 nvlist_free(props); 1151 1152 return (error); 1153 } 1154 1155 static int 1156 zfs_ioc_pool_export(zfs_cmd_t *zc) 1157 { 1158 int error; 1159 boolean_t force = (boolean_t)zc->zc_cookie; 1160 boolean_t hardforce = (boolean_t)zc->zc_guid; 1161 1162 zfs_log_history(zc); 1163 error = spa_export(zc->zc_name, NULL, force, hardforce); 1164 if (error == 0) 1165 zvol_remove_minors(zc->zc_name); 1166 return (error); 1167 } 1168 1169 static int 1170 zfs_ioc_pool_configs(zfs_cmd_t *zc) 1171 { 1172 nvlist_t *configs; 1173 int error; 1174 1175 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 1176 return (EEXIST); 1177 1178 error = put_nvlist(zc, configs); 1179 1180 nvlist_free(configs); 1181 1182 return (error); 1183 } 1184 1185 static int 1186 zfs_ioc_pool_stats(zfs_cmd_t *zc) 1187 { 1188 nvlist_t *config; 1189 int error; 1190 int ret = 0; 1191 1192 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 1193 sizeof (zc->zc_value)); 1194 1195 if (config != NULL) { 1196 ret = put_nvlist(zc, config); 1197 nvlist_free(config); 1198 1199 /* 1200 * The config may be present even if 'error' is non-zero. 1201 * In this case we return success, and preserve the real errno 1202 * in 'zc_cookie'. 1203 */ 1204 zc->zc_cookie = error; 1205 } else { 1206 ret = error; 1207 } 1208 1209 return (ret); 1210 } 1211 1212 /* 1213 * Try to import the given pool, returning pool stats as appropriate so that 1214 * user land knows which devices are available and overall pool health. 1215 */ 1216 static int 1217 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 1218 { 1219 nvlist_t *tryconfig, *config; 1220 int error; 1221 1222 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1223 zc->zc_iflags, &tryconfig)) != 0) 1224 return (error); 1225 1226 config = spa_tryimport(tryconfig); 1227 1228 nvlist_free(tryconfig); 1229 1230 if (config == NULL) 1231 return (EINVAL); 1232 1233 error = put_nvlist(zc, config); 1234 nvlist_free(config); 1235 1236 return (error); 1237 } 1238 1239 static int 1240 zfs_ioc_pool_scrub(zfs_cmd_t *zc) 1241 { 1242 spa_t *spa; 1243 int error; 1244 1245 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1246 return (error); 1247 1248 error = spa_scrub(spa, zc->zc_cookie); 1249 1250 spa_close(spa, FTAG); 1251 1252 return (error); 1253 } 1254 1255 static int 1256 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 1257 { 1258 spa_t *spa; 1259 int error; 1260 1261 error = spa_open(zc->zc_name, &spa, FTAG); 1262 if (error == 0) { 1263 spa_freeze(spa); 1264 spa_close(spa, FTAG); 1265 } 1266 return (error); 1267 } 1268 1269 static int 1270 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 1271 { 1272 spa_t *spa; 1273 int error; 1274 1275 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1276 return (error); 1277 1278 if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) { 1279 spa_close(spa, FTAG); 1280 return (EINVAL); 1281 } 1282 1283 spa_upgrade(spa, zc->zc_cookie); 1284 spa_close(spa, FTAG); 1285 1286 return (error); 1287 } 1288 1289 static int 1290 zfs_ioc_pool_get_history(zfs_cmd_t *zc) 1291 { 1292 spa_t *spa; 1293 char *hist_buf; 1294 uint64_t size; 1295 int error; 1296 1297 if ((size = zc->zc_history_len) == 0) 1298 return (EINVAL); 1299 1300 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1301 return (error); 1302 1303 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 1304 spa_close(spa, FTAG); 1305 return (ENOTSUP); 1306 } 1307 1308 hist_buf = kmem_alloc(size, KM_SLEEP); 1309 if ((error = spa_history_get(spa, &zc->zc_history_offset, 1310 &zc->zc_history_len, hist_buf)) == 0) { 1311 error = ddi_copyout(hist_buf, 1312 (void *)(uintptr_t)zc->zc_history, 1313 zc->zc_history_len, zc->zc_iflags); 1314 } 1315 1316 spa_close(spa, FTAG); 1317 kmem_free(hist_buf, size); 1318 return (error); 1319 } 1320 1321 static int 1322 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 1323 { 1324 int error; 1325 1326 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)) 1327 return (error); 1328 1329 return (0); 1330 } 1331 1332 /* 1333 * inputs: 1334 * zc_name name of filesystem 1335 * zc_obj object to find 1336 * 1337 * outputs: 1338 * zc_value name of object 1339 */ 1340 static int 1341 zfs_ioc_obj_to_path(zfs_cmd_t *zc) 1342 { 1343 objset_t *os; 1344 int error; 1345 1346 /* XXX reading from objset not owned */ 1347 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1348 return (error); 1349 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1350 dmu_objset_rele(os, FTAG); 1351 return (EINVAL); 1352 } 1353 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, 1354 sizeof (zc->zc_value)); 1355 dmu_objset_rele(os, FTAG); 1356 1357 return (error); 1358 } 1359 1360 static int 1361 zfs_ioc_vdev_add(zfs_cmd_t *zc) 1362 { 1363 spa_t *spa; 1364 int error; 1365 nvlist_t *config, **l2cache, **spares; 1366 uint_t nl2cache = 0, nspares = 0; 1367 1368 error = spa_open(zc->zc_name, &spa, FTAG); 1369 if (error != 0) 1370 return (error); 1371 1372 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1373 zc->zc_iflags, &config); 1374 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, 1375 &l2cache, &nl2cache); 1376 1377 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, 1378 &spares, &nspares); 1379 1380 /* 1381 * A root pool with concatenated devices is not supported. 1382 * Thus, can not add a device to a root pool. 1383 * 1384 * Intent log device can not be added to a rootpool because 1385 * during mountroot, zil is replayed, a seperated log device 1386 * can not be accessed during the mountroot time. 1387 * 1388 * l2cache and spare devices are ok to be added to a rootpool. 1389 */ 1390 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { 1391 nvlist_free(config); 1392 spa_close(spa, FTAG); 1393 return (EDOM); 1394 } 1395 1396 if (error == 0) { 1397 error = spa_vdev_add(spa, config); 1398 nvlist_free(config); 1399 } 1400 spa_close(spa, FTAG); 1401 return (error); 1402 } 1403 1404 static int 1405 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 1406 { 1407 spa_t *spa; 1408 int error; 1409 1410 error = spa_open(zc->zc_name, &spa, FTAG); 1411 if (error != 0) 1412 return (error); 1413 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 1414 spa_close(spa, FTAG); 1415 return (error); 1416 } 1417 1418 static int 1419 zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 1420 { 1421 spa_t *spa; 1422 int error; 1423 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 1424 1425 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1426 return (error); 1427 switch (zc->zc_cookie) { 1428 case VDEV_STATE_ONLINE: 1429 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 1430 break; 1431 1432 case VDEV_STATE_OFFLINE: 1433 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 1434 break; 1435 1436 case VDEV_STATE_FAULTED: 1437 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1438 zc->zc_obj != VDEV_AUX_EXTERNAL) 1439 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1440 1441 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); 1442 break; 1443 1444 case VDEV_STATE_DEGRADED: 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_degrade(spa, zc->zc_guid, zc->zc_obj); 1450 break; 1451 1452 default: 1453 error = EINVAL; 1454 } 1455 zc->zc_cookie = newstate; 1456 spa_close(spa, FTAG); 1457 return (error); 1458 } 1459 1460 static int 1461 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1462 { 1463 spa_t *spa; 1464 int replacing = zc->zc_cookie; 1465 nvlist_t *config; 1466 int error; 1467 1468 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1469 return (error); 1470 1471 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1472 zc->zc_iflags, &config)) == 0) { 1473 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 1474 nvlist_free(config); 1475 } 1476 1477 spa_close(spa, FTAG); 1478 return (error); 1479 } 1480 1481 static int 1482 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 1483 { 1484 spa_t *spa; 1485 int error; 1486 1487 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1488 return (error); 1489 1490 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); 1491 1492 spa_close(spa, FTAG); 1493 return (error); 1494 } 1495 1496 static int 1497 zfs_ioc_vdev_split(zfs_cmd_t *zc) 1498 { 1499 spa_t *spa; 1500 nvlist_t *config, *props = NULL; 1501 int error; 1502 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT); 1503 1504 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1505 return (error); 1506 1507 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1508 zc->zc_iflags, &config)) { 1509 spa_close(spa, FTAG); 1510 return (error); 1511 } 1512 1513 if (zc->zc_nvlist_src_size != 0 && (error = 1514 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1515 zc->zc_iflags, &props))) { 1516 spa_close(spa, FTAG); 1517 nvlist_free(config); 1518 return (error); 1519 } 1520 1521 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp); 1522 1523 spa_close(spa, FTAG); 1524 1525 nvlist_free(config); 1526 nvlist_free(props); 1527 1528 return (error); 1529 } 1530 1531 static int 1532 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 1533 { 1534 spa_t *spa; 1535 char *path = zc->zc_value; 1536 uint64_t guid = zc->zc_guid; 1537 int error; 1538 1539 error = spa_open(zc->zc_name, &spa, FTAG); 1540 if (error != 0) 1541 return (error); 1542 1543 error = spa_vdev_setpath(spa, guid, path); 1544 spa_close(spa, FTAG); 1545 return (error); 1546 } 1547 1548 static int 1549 zfs_ioc_vdev_setfru(zfs_cmd_t *zc) 1550 { 1551 spa_t *spa; 1552 char *fru = zc->zc_value; 1553 uint64_t guid = zc->zc_guid; 1554 int error; 1555 1556 error = spa_open(zc->zc_name, &spa, FTAG); 1557 if (error != 0) 1558 return (error); 1559 1560 error = spa_vdev_setfru(spa, guid, fru); 1561 spa_close(spa, FTAG); 1562 return (error); 1563 } 1564 1565 /* 1566 * inputs: 1567 * zc_name name of filesystem 1568 * zc_nvlist_dst_size size of buffer for property nvlist 1569 * 1570 * outputs: 1571 * zc_objset_stats stats 1572 * zc_nvlist_dst property nvlist 1573 * zc_nvlist_dst_size size of property nvlist 1574 */ 1575 static int 1576 zfs_ioc_objset_stats(zfs_cmd_t *zc) 1577 { 1578 objset_t *os = NULL; 1579 int error; 1580 nvlist_t *nv; 1581 1582 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1583 return (error); 1584 1585 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1586 1587 if (zc->zc_nvlist_dst != 0 && 1588 (error = dsl_prop_get_all(os, &nv)) == 0) { 1589 dmu_objset_stats(os, nv); 1590 /* 1591 * NB: zvol_get_stats() will read the objset contents, 1592 * which we aren't supposed to do with a 1593 * DS_MODE_USER hold, because it could be 1594 * inconsistent. So this is a bit of a workaround... 1595 * XXX reading with out owning 1596 */ 1597 if (!zc->zc_objset_stats.dds_inconsistent) { 1598 if (dmu_objset_type(os) == DMU_OST_ZVOL) 1599 VERIFY(zvol_get_stats(os, nv) == 0); 1600 } 1601 error = put_nvlist(zc, nv); 1602 nvlist_free(nv); 1603 } 1604 1605 dmu_objset_rele(os, FTAG); 1606 return (error); 1607 } 1608 1609 /* 1610 * inputs: 1611 * zc_name name of filesystem 1612 * zc_nvlist_dst_size size of buffer for property nvlist 1613 * 1614 * outputs: 1615 * zc_nvlist_dst received property nvlist 1616 * zc_nvlist_dst_size size of received property nvlist 1617 * 1618 * Gets received properties (distinct from local properties on or after 1619 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from 1620 * local property values. 1621 */ 1622 static int 1623 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) 1624 { 1625 objset_t *os = NULL; 1626 int error; 1627 nvlist_t *nv; 1628 1629 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1630 return (error); 1631 1632 /* 1633 * Without this check, we would return local property values if the 1634 * caller has not already received properties on or after 1635 * SPA_VERSION_RECVD_PROPS. 1636 */ 1637 if (!dsl_prop_get_hasrecvd(os)) { 1638 dmu_objset_rele(os, FTAG); 1639 return (ENOTSUP); 1640 } 1641 1642 if (zc->zc_nvlist_dst != 0 && 1643 (error = dsl_prop_get_received(os, &nv)) == 0) { 1644 error = put_nvlist(zc, nv); 1645 nvlist_free(nv); 1646 } 1647 1648 dmu_objset_rele(os, FTAG); 1649 return (error); 1650 } 1651 1652 static int 1653 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) 1654 { 1655 uint64_t value; 1656 int error; 1657 1658 /* 1659 * zfs_get_zplprop() will either find a value or give us 1660 * the default value (if there is one). 1661 */ 1662 if ((error = zfs_get_zplprop(os, prop, &value)) != 0) 1663 return (error); 1664 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); 1665 return (0); 1666 } 1667 1668 /* 1669 * inputs: 1670 * zc_name name of filesystem 1671 * zc_nvlist_dst_size size of buffer for zpl property nvlist 1672 * 1673 * outputs: 1674 * zc_nvlist_dst zpl property nvlist 1675 * zc_nvlist_dst_size size of zpl property nvlist 1676 */ 1677 static int 1678 zfs_ioc_objset_zplprops(zfs_cmd_t *zc) 1679 { 1680 objset_t *os; 1681 int err; 1682 1683 /* XXX reading without owning */ 1684 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1685 return (err); 1686 1687 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1688 1689 /* 1690 * NB: nvl_add_zplprop() will read the objset contents, 1691 * which we aren't supposed to do with a DS_MODE_USER 1692 * hold, because it could be inconsistent. 1693 */ 1694 if (zc->zc_nvlist_dst != NULL && 1695 !zc->zc_objset_stats.dds_inconsistent && 1696 dmu_objset_type(os) == DMU_OST_ZFS) { 1697 nvlist_t *nv; 1698 1699 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1700 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && 1701 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && 1702 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && 1703 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) 1704 err = put_nvlist(zc, nv); 1705 nvlist_free(nv); 1706 } else { 1707 err = ENOENT; 1708 } 1709 dmu_objset_rele(os, FTAG); 1710 return (err); 1711 } 1712 1713 static boolean_t 1714 dataset_name_hidden(const char *name) 1715 { 1716 /* 1717 * Skip over datasets that are not visible in this zone, 1718 * internal datasets (which have a $ in their name), and 1719 * temporary datasets (which have a % in their name). 1720 */ 1721 if (strchr(name, '$') != NULL) 1722 return (B_TRUE); 1723 if (strchr(name, '%') != NULL) 1724 return (B_TRUE); 1725 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 1726 return (B_TRUE); 1727 return (B_FALSE); 1728 } 1729 1730 /* 1731 * inputs: 1732 * zc_name name of filesystem 1733 * zc_cookie zap cursor 1734 * zc_nvlist_dst_size size of buffer for property nvlist 1735 * 1736 * outputs: 1737 * zc_name name of next filesystem 1738 * zc_cookie zap cursor 1739 * zc_objset_stats stats 1740 * zc_nvlist_dst property nvlist 1741 * zc_nvlist_dst_size size of property nvlist 1742 */ 1743 static int 1744 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 1745 { 1746 objset_t *os; 1747 int error; 1748 char *p; 1749 size_t orig_len = strlen(zc->zc_name); 1750 1751 top: 1752 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { 1753 if (error == ENOENT) 1754 error = ESRCH; 1755 return (error); 1756 } 1757 1758 p = strrchr(zc->zc_name, '/'); 1759 if (p == NULL || p[1] != '\0') 1760 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 1761 p = zc->zc_name + strlen(zc->zc_name); 1762 1763 /* 1764 * Pre-fetch the datasets. dmu_objset_prefetch() always returns 0 1765 * but is not declared void because its called by dmu_objset_find(). 1766 */ 1767 if (zc->zc_cookie == 0) { 1768 uint64_t cookie = 0; 1769 int len = sizeof (zc->zc_name) - (p - zc->zc_name); 1770 1771 while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0) 1772 (void) dmu_objset_prefetch(p, NULL); 1773 } 1774 1775 do { 1776 error = dmu_dir_list_next(os, 1777 sizeof (zc->zc_name) - (p - zc->zc_name), p, 1778 NULL, &zc->zc_cookie); 1779 if (error == ENOENT) 1780 error = ESRCH; 1781 } while (error == 0 && dataset_name_hidden(zc->zc_name) && 1782 !(zc->zc_iflags & FKIOCTL)); 1783 dmu_objset_rele(os, FTAG); 1784 1785 /* 1786 * If it's an internal dataset (ie. with a '$' in its name), 1787 * don't try to get stats for it, otherwise we'll return ENOENT. 1788 */ 1789 if (error == 0 && strchr(zc->zc_name, '$') == NULL) { 1790 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 1791 if (error == ENOENT) { 1792 /* We lost a race with destroy, get the next one. */ 1793 zc->zc_name[orig_len] = '\0'; 1794 goto top; 1795 } 1796 } 1797 return (error); 1798 } 1799 1800 /* 1801 * inputs: 1802 * zc_name name of filesystem 1803 * zc_cookie zap cursor 1804 * zc_nvlist_dst_size size of buffer for property nvlist 1805 * 1806 * outputs: 1807 * zc_name name of next snapshot 1808 * zc_objset_stats stats 1809 * zc_nvlist_dst property nvlist 1810 * zc_nvlist_dst_size size of property nvlist 1811 */ 1812 static int 1813 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 1814 { 1815 objset_t *os; 1816 int error; 1817 1818 top: 1819 if (zc->zc_cookie == 0) 1820 (void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch, 1821 NULL, DS_FIND_SNAPSHOTS); 1822 1823 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 1824 if (error) 1825 return (error == ENOENT ? ESRCH : error); 1826 1827 /* 1828 * A dataset name of maximum length cannot have any snapshots, 1829 * so exit immediately. 1830 */ 1831 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 1832 dmu_objset_rele(os, FTAG); 1833 return (ESRCH); 1834 } 1835 1836 error = dmu_snapshot_list_next(os, 1837 sizeof (zc->zc_name) - strlen(zc->zc_name), 1838 zc->zc_name + strlen(zc->zc_name), NULL, &zc->zc_cookie, NULL); 1839 dmu_objset_rele(os, FTAG); 1840 if (error == 0) { 1841 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 1842 if (error == ENOENT) { 1843 /* We lost a race with destroy, get the next one. */ 1844 *strchr(zc->zc_name, '@') = '\0'; 1845 goto top; 1846 } 1847 } else if (error == ENOENT) { 1848 error = ESRCH; 1849 } 1850 1851 /* if we failed, undo the @ that we tacked on to zc_name */ 1852 if (error) 1853 *strchr(zc->zc_name, '@') = '\0'; 1854 return (error); 1855 } 1856 1857 static int 1858 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) 1859 { 1860 const char *propname = nvpair_name(pair); 1861 uint64_t *valary; 1862 unsigned int vallen; 1863 const char *domain; 1864 char *dash; 1865 zfs_userquota_prop_t type; 1866 uint64_t rid; 1867 uint64_t quota; 1868 zfsvfs_t *zfsvfs; 1869 int err; 1870 1871 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 1872 nvlist_t *attrs; 1873 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 1874 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 1875 &pair) != 0) 1876 return (EINVAL); 1877 } 1878 1879 /* 1880 * A correctly constructed propname is encoded as 1881 * userquota@<rid>-<domain>. 1882 */ 1883 if ((dash = strchr(propname, '-')) == NULL || 1884 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 || 1885 vallen != 3) 1886 return (EINVAL); 1887 1888 domain = dash + 1; 1889 type = valary[0]; 1890 rid = valary[1]; 1891 quota = valary[2]; 1892 1893 err = zfsvfs_hold(dsname, FTAG, &zfsvfs); 1894 if (err == 0) { 1895 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); 1896 zfsvfs_rele(zfsvfs, FTAG); 1897 } 1898 1899 return (err); 1900 } 1901 1902 /* 1903 * If the named property is one that has a special function to set its value, 1904 * return 0 on success and a positive error code on failure; otherwise if it is 1905 * not one of the special properties handled by this function, return -1. 1906 * 1907 * XXX: It would be better for callers of the property interface if we handled 1908 * these special cases in dsl_prop.c (in the dsl layer). 1909 */ 1910 static int 1911 zfs_prop_set_special(const char *dsname, zprop_source_t source, 1912 nvpair_t *pair) 1913 { 1914 const char *propname = nvpair_name(pair); 1915 zfs_prop_t prop = zfs_name_to_prop(propname); 1916 uint64_t intval; 1917 int err; 1918 1919 if (prop == ZPROP_INVAL) { 1920 if (zfs_prop_userquota(propname)) 1921 return (zfs_prop_set_userquota(dsname, pair)); 1922 return (-1); 1923 } 1924 1925 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 1926 nvlist_t *attrs; 1927 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 1928 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 1929 &pair) == 0); 1930 } 1931 1932 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) 1933 return (-1); 1934 1935 VERIFY(0 == nvpair_value_uint64(pair, &intval)); 1936 1937 switch (prop) { 1938 case ZFS_PROP_QUOTA: 1939 err = dsl_dir_set_quota(dsname, source, intval); 1940 break; 1941 case ZFS_PROP_REFQUOTA: 1942 err = dsl_dataset_set_quota(dsname, source, intval); 1943 break; 1944 case ZFS_PROP_RESERVATION: 1945 err = dsl_dir_set_reservation(dsname, source, intval); 1946 break; 1947 case ZFS_PROP_REFRESERVATION: 1948 err = dsl_dataset_set_reservation(dsname, source, intval); 1949 break; 1950 case ZFS_PROP_VOLSIZE: 1951 err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip), 1952 intval); 1953 break; 1954 case ZFS_PROP_VERSION: 1955 { 1956 zfsvfs_t *zfsvfs; 1957 uint64_t maxzplver = ZPL_VERSION; 1958 1959 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs)) != 0) 1960 break; 1961 1962 if (zfs_earlier_version(dsname, SPA_VERSION_USERSPACE)) 1963 maxzplver = ZPL_VERSION_USERSPACE - 1; 1964 if (zfs_earlier_version(dsname, SPA_VERSION_FUID)) 1965 maxzplver = ZPL_VERSION_FUID - 1; 1966 if (intval > maxzplver) { 1967 zfsvfs_rele(zfsvfs, FTAG); 1968 return (ENOTSUP); 1969 } 1970 1971 err = zfs_set_version(zfsvfs, intval); 1972 zfsvfs_rele(zfsvfs, FTAG); 1973 1974 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { 1975 zfs_cmd_t *zc; 1976 1977 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 1978 (void) strcpy(zc->zc_name, dsname); 1979 (void) zfs_ioc_userspace_upgrade(zc); 1980 kmem_free(zc, sizeof (zfs_cmd_t)); 1981 } 1982 break; 1983 } 1984 1985 default: 1986 err = -1; 1987 } 1988 1989 return (err); 1990 } 1991 1992 /* 1993 * This function is best effort. If it fails to set any of the given properties, 1994 * it continues to set as many as it can and returns the first error 1995 * encountered. If the caller provides a non-NULL errlist, it also gives the 1996 * complete list of names of all the properties it failed to set along with the 1997 * corresponding error numbers. The caller is responsible for freeing the 1998 * returned errlist. 1999 * 2000 * If every property is set successfully, zero is returned and the list pointed 2001 * at by errlist is NULL. 2002 */ 2003 int 2004 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, 2005 nvlist_t **errlist) 2006 { 2007 nvpair_t *pair; 2008 nvpair_t *propval; 2009 int rv = 0; 2010 uint64_t intval; 2011 char *strval; 2012 nvlist_t *genericnvl; 2013 nvlist_t *errors; 2014 nvlist_t *retrynvl; 2015 2016 VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2017 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2018 VERIFY(nvlist_alloc(&retrynvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2019 2020 retry: 2021 pair = NULL; 2022 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2023 const char *propname = nvpair_name(pair); 2024 zfs_prop_t prop = zfs_name_to_prop(propname); 2025 int err = 0; 2026 2027 /* decode the property value */ 2028 propval = pair; 2029 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2030 nvlist_t *attrs; 2031 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2032 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2033 &propval) != 0) 2034 err = EINVAL; 2035 } 2036 2037 /* Validate value type */ 2038 if (err == 0 && prop == ZPROP_INVAL) { 2039 if (zfs_prop_user(propname)) { 2040 if (nvpair_type(propval) != DATA_TYPE_STRING) 2041 err = EINVAL; 2042 } else if (zfs_prop_userquota(propname)) { 2043 if (nvpair_type(propval) != 2044 DATA_TYPE_UINT64_ARRAY) 2045 err = EINVAL; 2046 } 2047 } else if (err == 0) { 2048 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2049 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) 2050 err = EINVAL; 2051 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { 2052 const char *unused; 2053 2054 VERIFY(nvpair_value_uint64(propval, 2055 &intval) == 0); 2056 2057 switch (zfs_prop_get_type(prop)) { 2058 case PROP_TYPE_NUMBER: 2059 break; 2060 case PROP_TYPE_STRING: 2061 err = EINVAL; 2062 break; 2063 case PROP_TYPE_INDEX: 2064 if (zfs_prop_index_to_string(prop, 2065 intval, &unused) != 0) 2066 err = EINVAL; 2067 break; 2068 default: 2069 cmn_err(CE_PANIC, 2070 "unknown property type"); 2071 } 2072 } else { 2073 err = EINVAL; 2074 } 2075 } 2076 2077 /* Validate permissions */ 2078 if (err == 0) 2079 err = zfs_check_settable(dsname, pair, CRED()); 2080 2081 if (err == 0) { 2082 err = zfs_prop_set_special(dsname, source, pair); 2083 if (err == -1) { 2084 /* 2085 * For better performance we build up a list of 2086 * properties to set in a single transaction. 2087 */ 2088 err = nvlist_add_nvpair(genericnvl, pair); 2089 } else if (err != 0 && nvl != retrynvl) { 2090 /* 2091 * This may be a spurious error caused by 2092 * receiving quota and reservation out of order. 2093 * Try again in a second pass. 2094 */ 2095 err = nvlist_add_nvpair(retrynvl, pair); 2096 } 2097 } 2098 2099 if (err != 0) 2100 VERIFY(nvlist_add_int32(errors, propname, err) == 0); 2101 } 2102 2103 if (nvl != retrynvl && !nvlist_empty(retrynvl)) { 2104 nvl = retrynvl; 2105 goto retry; 2106 } 2107 2108 if (!nvlist_empty(genericnvl) && 2109 dsl_props_set(dsname, source, genericnvl) != 0) { 2110 /* 2111 * If this fails, we still want to set as many properties as we 2112 * can, so try setting them individually. 2113 */ 2114 pair = NULL; 2115 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { 2116 const char *propname = nvpair_name(pair); 2117 int err = 0; 2118 2119 propval = pair; 2120 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2121 nvlist_t *attrs; 2122 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2123 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2124 &propval) == 0); 2125 } 2126 2127 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2128 VERIFY(nvpair_value_string(propval, 2129 &strval) == 0); 2130 err = dsl_prop_set(dsname, propname, source, 1, 2131 strlen(strval) + 1, strval); 2132 } else { 2133 VERIFY(nvpair_value_uint64(propval, 2134 &intval) == 0); 2135 err = dsl_prop_set(dsname, propname, source, 8, 2136 1, &intval); 2137 } 2138 2139 if (err != 0) { 2140 VERIFY(nvlist_add_int32(errors, propname, 2141 err) == 0); 2142 } 2143 } 2144 } 2145 nvlist_free(genericnvl); 2146 nvlist_free(retrynvl); 2147 2148 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 2149 nvlist_free(errors); 2150 errors = NULL; 2151 } else { 2152 VERIFY(nvpair_value_int32(pair, &rv) == 0); 2153 } 2154 2155 if (errlist == NULL) 2156 nvlist_free(errors); 2157 else 2158 *errlist = errors; 2159 2160 return (rv); 2161 } 2162 2163 /* 2164 * Check that all the properties are valid user properties. 2165 */ 2166 static int 2167 zfs_check_userprops(char *fsname, nvlist_t *nvl) 2168 { 2169 nvpair_t *pair = NULL; 2170 int error = 0; 2171 2172 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2173 const char *propname = nvpair_name(pair); 2174 char *valstr; 2175 2176 if (!zfs_prop_user(propname) || 2177 nvpair_type(pair) != DATA_TYPE_STRING) 2178 return (EINVAL); 2179 2180 if (error = zfs_secpolicy_write_perms(fsname, 2181 ZFS_DELEG_PERM_USERPROP, CRED())) 2182 return (error); 2183 2184 if (strlen(propname) >= ZAP_MAXNAMELEN) 2185 return (ENAMETOOLONG); 2186 2187 VERIFY(nvpair_value_string(pair, &valstr) == 0); 2188 if (strlen(valstr) >= ZAP_MAXVALUELEN) 2189 return (E2BIG); 2190 } 2191 return (0); 2192 } 2193 2194 static void 2195 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) 2196 { 2197 nvpair_t *pair; 2198 2199 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2200 2201 pair = NULL; 2202 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { 2203 if (nvlist_exists(skipped, nvpair_name(pair))) 2204 continue; 2205 2206 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); 2207 } 2208 } 2209 2210 static int 2211 clear_received_props(objset_t *os, const char *fs, nvlist_t *props, 2212 nvlist_t *skipped) 2213 { 2214 int err = 0; 2215 nvlist_t *cleared_props = NULL; 2216 props_skip(props, skipped, &cleared_props); 2217 if (!nvlist_empty(cleared_props)) { 2218 /* 2219 * Acts on local properties until the dataset has received 2220 * properties at least once on or after SPA_VERSION_RECVD_PROPS. 2221 */ 2222 zprop_source_t flags = (ZPROP_SRC_NONE | 2223 (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0)); 2224 err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL); 2225 } 2226 nvlist_free(cleared_props); 2227 return (err); 2228 } 2229 2230 /* 2231 * inputs: 2232 * zc_name name of filesystem 2233 * zc_value name of property to set 2234 * zc_nvlist_src{_size} nvlist of properties to apply 2235 * zc_cookie received properties flag 2236 * 2237 * outputs: 2238 * zc_nvlist_dst{_size} error for each unapplied received property 2239 */ 2240 static int 2241 zfs_ioc_set_prop(zfs_cmd_t *zc) 2242 { 2243 nvlist_t *nvl; 2244 boolean_t received = zc->zc_cookie; 2245 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : 2246 ZPROP_SRC_LOCAL); 2247 nvlist_t *errors = NULL; 2248 int error; 2249 2250 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2251 zc->zc_iflags, &nvl)) != 0) 2252 return (error); 2253 2254 if (received) { 2255 nvlist_t *origprops; 2256 objset_t *os; 2257 2258 if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) { 2259 if (dsl_prop_get_received(os, &origprops) == 0) { 2260 (void) clear_received_props(os, 2261 zc->zc_name, origprops, nvl); 2262 nvlist_free(origprops); 2263 } 2264 2265 dsl_prop_set_hasrecvd(os); 2266 dmu_objset_rele(os, FTAG); 2267 } 2268 } 2269 2270 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors); 2271 2272 if (zc->zc_nvlist_dst != NULL && errors != NULL) { 2273 (void) put_nvlist(zc, errors); 2274 } 2275 2276 nvlist_free(errors); 2277 nvlist_free(nvl); 2278 return (error); 2279 } 2280 2281 /* 2282 * inputs: 2283 * zc_name name of filesystem 2284 * zc_value name of property to inherit 2285 * zc_cookie revert to received value if TRUE 2286 * 2287 * outputs: none 2288 */ 2289 static int 2290 zfs_ioc_inherit_prop(zfs_cmd_t *zc) 2291 { 2292 const char *propname = zc->zc_value; 2293 zfs_prop_t prop = zfs_name_to_prop(propname); 2294 boolean_t received = zc->zc_cookie; 2295 zprop_source_t source = (received 2296 ? ZPROP_SRC_NONE /* revert to received value, if any */ 2297 : ZPROP_SRC_INHERITED); /* explicitly inherit */ 2298 2299 if (received) { 2300 nvlist_t *dummy; 2301 nvpair_t *pair; 2302 zprop_type_t type; 2303 int err; 2304 2305 /* 2306 * zfs_prop_set_special() expects properties in the form of an 2307 * nvpair with type info. 2308 */ 2309 if (prop == ZPROP_INVAL) { 2310 if (!zfs_prop_user(propname)) 2311 return (EINVAL); 2312 2313 type = PROP_TYPE_STRING; 2314 } else if (prop == ZFS_PROP_VOLSIZE || 2315 prop == ZFS_PROP_VERSION) { 2316 return (EINVAL); 2317 } else { 2318 type = zfs_prop_get_type(prop); 2319 } 2320 2321 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2322 2323 switch (type) { 2324 case PROP_TYPE_STRING: 2325 VERIFY(0 == nvlist_add_string(dummy, propname, "")); 2326 break; 2327 case PROP_TYPE_NUMBER: 2328 case PROP_TYPE_INDEX: 2329 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); 2330 break; 2331 default: 2332 nvlist_free(dummy); 2333 return (EINVAL); 2334 } 2335 2336 pair = nvlist_next_nvpair(dummy, NULL); 2337 err = zfs_prop_set_special(zc->zc_name, source, pair); 2338 nvlist_free(dummy); 2339 if (err != -1) 2340 return (err); /* special property already handled */ 2341 } else { 2342 /* 2343 * Only check this in the non-received case. We want to allow 2344 * 'inherit -S' to revert non-inheritable properties like quota 2345 * and reservation to the received or default values even though 2346 * they are not considered inheritable. 2347 */ 2348 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) 2349 return (EINVAL); 2350 } 2351 2352 /* the property name has been validated by zfs_secpolicy_inherit() */ 2353 return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL)); 2354 } 2355 2356 static int 2357 zfs_ioc_pool_set_props(zfs_cmd_t *zc) 2358 { 2359 nvlist_t *props; 2360 spa_t *spa; 2361 int error; 2362 nvpair_t *pair; 2363 2364 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2365 zc->zc_iflags, &props)) 2366 return (error); 2367 2368 /* 2369 * If the only property is the configfile, then just do a spa_lookup() 2370 * to handle the faulted case. 2371 */ 2372 pair = nvlist_next_nvpair(props, NULL); 2373 if (pair != NULL && strcmp(nvpair_name(pair), 2374 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && 2375 nvlist_next_nvpair(props, pair) == NULL) { 2376 mutex_enter(&spa_namespace_lock); 2377 if ((spa = spa_lookup(zc->zc_name)) != NULL) { 2378 spa_configfile_set(spa, props, B_FALSE); 2379 spa_config_sync(spa, B_FALSE, B_TRUE); 2380 } 2381 mutex_exit(&spa_namespace_lock); 2382 if (spa != NULL) { 2383 nvlist_free(props); 2384 return (0); 2385 } 2386 } 2387 2388 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2389 nvlist_free(props); 2390 return (error); 2391 } 2392 2393 error = spa_prop_set(spa, props); 2394 2395 nvlist_free(props); 2396 spa_close(spa, FTAG); 2397 2398 return (error); 2399 } 2400 2401 static int 2402 zfs_ioc_pool_get_props(zfs_cmd_t *zc) 2403 { 2404 spa_t *spa; 2405 int error; 2406 nvlist_t *nvp = NULL; 2407 2408 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2409 /* 2410 * If the pool is faulted, there may be properties we can still 2411 * get (such as altroot and cachefile), so attempt to get them 2412 * anyway. 2413 */ 2414 mutex_enter(&spa_namespace_lock); 2415 if ((spa = spa_lookup(zc->zc_name)) != NULL) 2416 error = spa_prop_get(spa, &nvp); 2417 mutex_exit(&spa_namespace_lock); 2418 } else { 2419 error = spa_prop_get(spa, &nvp); 2420 spa_close(spa, FTAG); 2421 } 2422 2423 if (error == 0 && zc->zc_nvlist_dst != NULL) 2424 error = put_nvlist(zc, nvp); 2425 else 2426 error = EFAULT; 2427 2428 nvlist_free(nvp); 2429 return (error); 2430 } 2431 2432 /* 2433 * inputs: 2434 * zc_name name of filesystem 2435 * zc_nvlist_src{_size} nvlist of delegated permissions 2436 * zc_perm_action allow/unallow flag 2437 * 2438 * outputs: none 2439 */ 2440 static int 2441 zfs_ioc_set_fsacl(zfs_cmd_t *zc) 2442 { 2443 int error; 2444 nvlist_t *fsaclnv = NULL; 2445 2446 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2447 zc->zc_iflags, &fsaclnv)) != 0) 2448 return (error); 2449 2450 /* 2451 * Verify nvlist is constructed correctly 2452 */ 2453 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 2454 nvlist_free(fsaclnv); 2455 return (EINVAL); 2456 } 2457 2458 /* 2459 * If we don't have PRIV_SYS_MOUNT, then validate 2460 * that user is allowed to hand out each permission in 2461 * the nvlist(s) 2462 */ 2463 2464 error = secpolicy_zfs(CRED()); 2465 if (error) { 2466 if (zc->zc_perm_action == B_FALSE) { 2467 error = dsl_deleg_can_allow(zc->zc_name, 2468 fsaclnv, CRED()); 2469 } else { 2470 error = dsl_deleg_can_unallow(zc->zc_name, 2471 fsaclnv, CRED()); 2472 } 2473 } 2474 2475 if (error == 0) 2476 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 2477 2478 nvlist_free(fsaclnv); 2479 return (error); 2480 } 2481 2482 /* 2483 * inputs: 2484 * zc_name name of filesystem 2485 * 2486 * outputs: 2487 * zc_nvlist_src{_size} nvlist of delegated permissions 2488 */ 2489 static int 2490 zfs_ioc_get_fsacl(zfs_cmd_t *zc) 2491 { 2492 nvlist_t *nvp; 2493 int error; 2494 2495 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 2496 error = put_nvlist(zc, nvp); 2497 nvlist_free(nvp); 2498 } 2499 2500 return (error); 2501 } 2502 2503 /* 2504 * Search the vfs list for a specified resource. Returns a pointer to it 2505 * or NULL if no suitable entry is found. The caller of this routine 2506 * is responsible for releasing the returned vfs pointer. 2507 */ 2508 static vfs_t * 2509 zfs_get_vfs(const char *resource) 2510 { 2511 struct vfs *vfsp; 2512 struct vfs *vfs_found = NULL; 2513 2514 vfs_list_read_lock(); 2515 vfsp = rootvfs; 2516 do { 2517 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 2518 VFS_HOLD(vfsp); 2519 vfs_found = vfsp; 2520 break; 2521 } 2522 vfsp = vfsp->vfs_next; 2523 } while (vfsp != rootvfs); 2524 vfs_list_unlock(); 2525 return (vfs_found); 2526 } 2527 2528 /* ARGSUSED */ 2529 static void 2530 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 2531 { 2532 zfs_creat_t *zct = arg; 2533 2534 zfs_create_fs(os, cr, zct->zct_zplprops, tx); 2535 } 2536 2537 #define ZFS_PROP_UNDEFINED ((uint64_t)-1) 2538 2539 /* 2540 * inputs: 2541 * createprops list of properties requested by creator 2542 * default_zplver zpl version to use if unspecified in createprops 2543 * fuids_ok fuids allowed in this version of the spa? 2544 * os parent objset pointer (NULL if root fs) 2545 * 2546 * outputs: 2547 * zplprops values for the zplprops we attach to the master node object 2548 * is_ci true if requested file system will be purely case-insensitive 2549 * 2550 * Determine the settings for utf8only, normalization and 2551 * casesensitivity. Specific values may have been requested by the 2552 * creator and/or we can inherit values from the parent dataset. If 2553 * the file system is of too early a vintage, a creator can not 2554 * request settings for these properties, even if the requested 2555 * setting is the default value. We don't actually want to create dsl 2556 * properties for these, so remove them from the source nvlist after 2557 * processing. 2558 */ 2559 static int 2560 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, 2561 boolean_t fuids_ok, nvlist_t *createprops, nvlist_t *zplprops, 2562 boolean_t *is_ci) 2563 { 2564 uint64_t sense = ZFS_PROP_UNDEFINED; 2565 uint64_t norm = ZFS_PROP_UNDEFINED; 2566 uint64_t u8 = ZFS_PROP_UNDEFINED; 2567 2568 ASSERT(zplprops != NULL); 2569 2570 /* 2571 * Pull out creator prop choices, if any. 2572 */ 2573 if (createprops) { 2574 (void) nvlist_lookup_uint64(createprops, 2575 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); 2576 (void) nvlist_lookup_uint64(createprops, 2577 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); 2578 (void) nvlist_remove_all(createprops, 2579 zfs_prop_to_name(ZFS_PROP_NORMALIZE)); 2580 (void) nvlist_lookup_uint64(createprops, 2581 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); 2582 (void) nvlist_remove_all(createprops, 2583 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 2584 (void) nvlist_lookup_uint64(createprops, 2585 zfs_prop_to_name(ZFS_PROP_CASE), &sense); 2586 (void) nvlist_remove_all(createprops, 2587 zfs_prop_to_name(ZFS_PROP_CASE)); 2588 } 2589 2590 /* 2591 * If the zpl version requested is whacky or the file system 2592 * or pool is version is too "young" to support normalization 2593 * and the creator tried to set a value for one of the props, 2594 * error out. 2595 */ 2596 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || 2597 (zplver >= ZPL_VERSION_FUID && !fuids_ok) || 2598 (zplver < ZPL_VERSION_NORMALIZATION && 2599 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || 2600 sense != ZFS_PROP_UNDEFINED))) 2601 return (ENOTSUP); 2602 2603 /* 2604 * Put the version in the zplprops 2605 */ 2606 VERIFY(nvlist_add_uint64(zplprops, 2607 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); 2608 2609 if (norm == ZFS_PROP_UNDEFINED) 2610 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); 2611 VERIFY(nvlist_add_uint64(zplprops, 2612 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); 2613 2614 /* 2615 * If we're normalizing, names must always be valid UTF-8 strings. 2616 */ 2617 if (norm) 2618 u8 = 1; 2619 if (u8 == ZFS_PROP_UNDEFINED) 2620 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); 2621 VERIFY(nvlist_add_uint64(zplprops, 2622 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); 2623 2624 if (sense == ZFS_PROP_UNDEFINED) 2625 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); 2626 VERIFY(nvlist_add_uint64(zplprops, 2627 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); 2628 2629 if (is_ci) 2630 *is_ci = (sense == ZFS_CASE_INSENSITIVE); 2631 2632 return (0); 2633 } 2634 2635 static int 2636 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, 2637 nvlist_t *zplprops, boolean_t *is_ci) 2638 { 2639 boolean_t fuids_ok = B_TRUE; 2640 uint64_t zplver = ZPL_VERSION; 2641 objset_t *os = NULL; 2642 char parentname[MAXNAMELEN]; 2643 char *cp; 2644 int error; 2645 2646 (void) strlcpy(parentname, dataset, sizeof (parentname)); 2647 cp = strrchr(parentname, '/'); 2648 ASSERT(cp != NULL); 2649 cp[0] = '\0'; 2650 2651 if (zfs_earlier_version(dataset, SPA_VERSION_USERSPACE)) 2652 zplver = ZPL_VERSION_USERSPACE - 1; 2653 if (zfs_earlier_version(dataset, SPA_VERSION_FUID)) { 2654 zplver = ZPL_VERSION_FUID - 1; 2655 fuids_ok = B_FALSE; 2656 } 2657 2658 /* 2659 * Open parent object set so we can inherit zplprop values. 2660 */ 2661 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) 2662 return (error); 2663 2664 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, createprops, 2665 zplprops, is_ci); 2666 dmu_objset_rele(os, FTAG); 2667 return (error); 2668 } 2669 2670 static int 2671 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, 2672 nvlist_t *zplprops, boolean_t *is_ci) 2673 { 2674 boolean_t fuids_ok = B_TRUE; 2675 uint64_t zplver = ZPL_VERSION; 2676 int error; 2677 2678 if (spa_vers < SPA_VERSION_FUID) { 2679 zplver = ZPL_VERSION_FUID - 1; 2680 fuids_ok = B_FALSE; 2681 } 2682 2683 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, createprops, 2684 zplprops, is_ci); 2685 return (error); 2686 } 2687 2688 /* 2689 * inputs: 2690 * zc_objset_type type of objset to create (fs vs zvol) 2691 * zc_name name of new objset 2692 * zc_value name of snapshot to clone from (may be empty) 2693 * zc_nvlist_src{_size} nvlist of properties to apply 2694 * 2695 * outputs: none 2696 */ 2697 static int 2698 zfs_ioc_create(zfs_cmd_t *zc) 2699 { 2700 objset_t *clone; 2701 int error = 0; 2702 zfs_creat_t zct; 2703 nvlist_t *nvprops = NULL; 2704 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 2705 dmu_objset_type_t type = zc->zc_objset_type; 2706 2707 switch (type) { 2708 2709 case DMU_OST_ZFS: 2710 cbfunc = zfs_create_cb; 2711 break; 2712 2713 case DMU_OST_ZVOL: 2714 cbfunc = zvol_create_cb; 2715 break; 2716 2717 default: 2718 cbfunc = NULL; 2719 break; 2720 } 2721 if (strchr(zc->zc_name, '@') || 2722 strchr(zc->zc_name, '%')) 2723 return (EINVAL); 2724 2725 if (zc->zc_nvlist_src != NULL && 2726 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2727 zc->zc_iflags, &nvprops)) != 0) 2728 return (error); 2729 2730 zct.zct_zplprops = NULL; 2731 zct.zct_props = nvprops; 2732 2733 if (zc->zc_value[0] != '\0') { 2734 /* 2735 * We're creating a clone of an existing snapshot. 2736 */ 2737 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 2738 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) { 2739 nvlist_free(nvprops); 2740 return (EINVAL); 2741 } 2742 2743 error = dmu_objset_hold(zc->zc_value, FTAG, &clone); 2744 if (error) { 2745 nvlist_free(nvprops); 2746 return (error); 2747 } 2748 2749 error = dmu_objset_clone(zc->zc_name, dmu_objset_ds(clone), 0); 2750 dmu_objset_rele(clone, FTAG); 2751 if (error) { 2752 nvlist_free(nvprops); 2753 return (error); 2754 } 2755 } else { 2756 boolean_t is_insensitive = B_FALSE; 2757 2758 if (cbfunc == NULL) { 2759 nvlist_free(nvprops); 2760 return (EINVAL); 2761 } 2762 2763 if (type == DMU_OST_ZVOL) { 2764 uint64_t volsize, volblocksize; 2765 2766 if (nvprops == NULL || 2767 nvlist_lookup_uint64(nvprops, 2768 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 2769 &volsize) != 0) { 2770 nvlist_free(nvprops); 2771 return (EINVAL); 2772 } 2773 2774 if ((error = nvlist_lookup_uint64(nvprops, 2775 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 2776 &volblocksize)) != 0 && error != ENOENT) { 2777 nvlist_free(nvprops); 2778 return (EINVAL); 2779 } 2780 2781 if (error != 0) 2782 volblocksize = zfs_prop_default_numeric( 2783 ZFS_PROP_VOLBLOCKSIZE); 2784 2785 if ((error = zvol_check_volblocksize( 2786 volblocksize)) != 0 || 2787 (error = zvol_check_volsize(volsize, 2788 volblocksize)) != 0) { 2789 nvlist_free(nvprops); 2790 return (error); 2791 } 2792 } else if (type == DMU_OST_ZFS) { 2793 int error; 2794 2795 /* 2796 * We have to have normalization and 2797 * case-folding flags correct when we do the 2798 * file system creation, so go figure them out 2799 * now. 2800 */ 2801 VERIFY(nvlist_alloc(&zct.zct_zplprops, 2802 NV_UNIQUE_NAME, KM_SLEEP) == 0); 2803 error = zfs_fill_zplprops(zc->zc_name, nvprops, 2804 zct.zct_zplprops, &is_insensitive); 2805 if (error != 0) { 2806 nvlist_free(nvprops); 2807 nvlist_free(zct.zct_zplprops); 2808 return (error); 2809 } 2810 } 2811 error = dmu_objset_create(zc->zc_name, type, 2812 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); 2813 nvlist_free(zct.zct_zplprops); 2814 } 2815 2816 /* 2817 * It would be nice to do this atomically. 2818 */ 2819 if (error == 0) { 2820 error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL, 2821 nvprops, NULL); 2822 if (error != 0) 2823 (void) dmu_objset_destroy(zc->zc_name, B_FALSE); 2824 } 2825 nvlist_free(nvprops); 2826 return (error); 2827 } 2828 2829 /* 2830 * inputs: 2831 * zc_name name of filesystem 2832 * zc_value short name of snapshot 2833 * zc_cookie recursive flag 2834 * zc_nvlist_src[_size] property list 2835 * 2836 * outputs: 2837 * zc_value short snapname (i.e. part after the '@') 2838 */ 2839 static int 2840 zfs_ioc_snapshot(zfs_cmd_t *zc) 2841 { 2842 nvlist_t *nvprops = NULL; 2843 int error; 2844 boolean_t recursive = zc->zc_cookie; 2845 2846 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 2847 return (EINVAL); 2848 2849 if (zc->zc_nvlist_src != NULL && 2850 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2851 zc->zc_iflags, &nvprops)) != 0) 2852 return (error); 2853 2854 error = zfs_check_userprops(zc->zc_name, nvprops); 2855 if (error) 2856 goto out; 2857 2858 if (!nvlist_empty(nvprops) && 2859 zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) { 2860 error = ENOTSUP; 2861 goto out; 2862 } 2863 2864 error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, 2865 nvprops, recursive); 2866 2867 out: 2868 nvlist_free(nvprops); 2869 return (error); 2870 } 2871 2872 int 2873 zfs_unmount_snap(const char *name, void *arg) 2874 { 2875 vfs_t *vfsp = NULL; 2876 2877 if (arg) { 2878 char *snapname = arg; 2879 char *fullname = kmem_asprintf("%s@%s", name, snapname); 2880 vfsp = zfs_get_vfs(fullname); 2881 strfree(fullname); 2882 } else if (strchr(name, '@')) { 2883 vfsp = zfs_get_vfs(name); 2884 } 2885 2886 if (vfsp) { 2887 /* 2888 * Always force the unmount for snapshots. 2889 */ 2890 int flag = MS_FORCE; 2891 int err; 2892 2893 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) { 2894 VFS_RELE(vfsp); 2895 return (err); 2896 } 2897 VFS_RELE(vfsp); 2898 if ((err = dounmount(vfsp, flag, kcred)) != 0) 2899 return (err); 2900 } 2901 return (0); 2902 } 2903 2904 /* 2905 * inputs: 2906 * zc_name name of filesystem 2907 * zc_value short name of snapshot 2908 * zc_defer_destroy mark for deferred destroy 2909 * 2910 * outputs: none 2911 */ 2912 static int 2913 zfs_ioc_destroy_snaps(zfs_cmd_t *zc) 2914 { 2915 int err; 2916 2917 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 2918 return (EINVAL); 2919 err = dmu_objset_find(zc->zc_name, 2920 zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN); 2921 if (err) 2922 return (err); 2923 return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value, 2924 zc->zc_defer_destroy)); 2925 } 2926 2927 /* 2928 * inputs: 2929 * zc_name name of dataset to destroy 2930 * zc_objset_type type of objset 2931 * zc_defer_destroy mark for deferred destroy 2932 * 2933 * outputs: none 2934 */ 2935 static int 2936 zfs_ioc_destroy(zfs_cmd_t *zc) 2937 { 2938 int err; 2939 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) { 2940 err = zfs_unmount_snap(zc->zc_name, NULL); 2941 if (err) 2942 return (err); 2943 } 2944 2945 err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy); 2946 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 2947 (void) zvol_remove_minor(zc->zc_name); 2948 return (err); 2949 } 2950 2951 /* 2952 * inputs: 2953 * zc_name name of dataset to rollback (to most recent snapshot) 2954 * 2955 * outputs: none 2956 */ 2957 static int 2958 zfs_ioc_rollback(zfs_cmd_t *zc) 2959 { 2960 dsl_dataset_t *ds, *clone; 2961 int error; 2962 zfsvfs_t *zfsvfs; 2963 char *clone_name; 2964 2965 error = dsl_dataset_hold(zc->zc_name, FTAG, &ds); 2966 if (error) 2967 return (error); 2968 2969 /* must not be a snapshot */ 2970 if (dsl_dataset_is_snapshot(ds)) { 2971 dsl_dataset_rele(ds, FTAG); 2972 return (EINVAL); 2973 } 2974 2975 /* must have a most recent snapshot */ 2976 if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) { 2977 dsl_dataset_rele(ds, FTAG); 2978 return (EINVAL); 2979 } 2980 2981 /* 2982 * Create clone of most recent snapshot. 2983 */ 2984 clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name); 2985 error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT); 2986 if (error) 2987 goto out; 2988 2989 error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone); 2990 if (error) 2991 goto out; 2992 2993 /* 2994 * Do clone swap. 2995 */ 2996 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 2997 error = zfs_suspend_fs(zfsvfs); 2998 if (error == 0) { 2999 int resume_err; 3000 3001 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) { 3002 error = dsl_dataset_clone_swap(clone, ds, 3003 B_TRUE); 3004 dsl_dataset_disown(ds, FTAG); 3005 ds = NULL; 3006 } else { 3007 error = EBUSY; 3008 } 3009 resume_err = zfs_resume_fs(zfsvfs, zc->zc_name); 3010 error = error ? error : resume_err; 3011 } 3012 VFS_RELE(zfsvfs->z_vfs); 3013 } else { 3014 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) { 3015 error = dsl_dataset_clone_swap(clone, ds, B_TRUE); 3016 dsl_dataset_disown(ds, FTAG); 3017 ds = NULL; 3018 } else { 3019 error = EBUSY; 3020 } 3021 } 3022 3023 /* 3024 * Destroy clone (which also closes it). 3025 */ 3026 (void) dsl_dataset_destroy(clone, FTAG, B_FALSE); 3027 3028 out: 3029 strfree(clone_name); 3030 if (ds) 3031 dsl_dataset_rele(ds, FTAG); 3032 return (error); 3033 } 3034 3035 /* 3036 * inputs: 3037 * zc_name old name of dataset 3038 * zc_value new name of dataset 3039 * zc_cookie recursive flag (only valid for snapshots) 3040 * 3041 * outputs: none 3042 */ 3043 static int 3044 zfs_ioc_rename(zfs_cmd_t *zc) 3045 { 3046 boolean_t recursive = zc->zc_cookie & 1; 3047 3048 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3049 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3050 strchr(zc->zc_value, '%')) 3051 return (EINVAL); 3052 3053 /* 3054 * Unmount snapshot unless we're doing a recursive rename, 3055 * in which case the dataset code figures out which snapshots 3056 * to unmount. 3057 */ 3058 if (!recursive && strchr(zc->zc_name, '@') != NULL && 3059 zc->zc_objset_type == DMU_OST_ZFS) { 3060 int err = zfs_unmount_snap(zc->zc_name, NULL); 3061 if (err) 3062 return (err); 3063 } 3064 if (zc->zc_objset_type == DMU_OST_ZVOL) 3065 (void) zvol_remove_minor(zc->zc_name); 3066 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive)); 3067 } 3068 3069 static int 3070 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3071 { 3072 const char *propname = nvpair_name(pair); 3073 boolean_t issnap = (strchr(dsname, '@') != NULL); 3074 zfs_prop_t prop = zfs_name_to_prop(propname); 3075 uint64_t intval; 3076 int err; 3077 3078 if (prop == ZPROP_INVAL) { 3079 if (zfs_prop_user(propname)) { 3080 if (err = zfs_secpolicy_write_perms(dsname, 3081 ZFS_DELEG_PERM_USERPROP, cr)) 3082 return (err); 3083 return (0); 3084 } 3085 3086 if (!issnap && zfs_prop_userquota(propname)) { 3087 const char *perm = NULL; 3088 const char *uq_prefix = 3089 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3090 const char *gq_prefix = 3091 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3092 3093 if (strncmp(propname, uq_prefix, 3094 strlen(uq_prefix)) == 0) { 3095 perm = ZFS_DELEG_PERM_USERQUOTA; 3096 } else if (strncmp(propname, gq_prefix, 3097 strlen(gq_prefix)) == 0) { 3098 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3099 } else { 3100 /* USERUSED and GROUPUSED are read-only */ 3101 return (EINVAL); 3102 } 3103 3104 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3105 return (err); 3106 return (0); 3107 } 3108 3109 return (EINVAL); 3110 } 3111 3112 if (issnap) 3113 return (EINVAL); 3114 3115 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3116 /* 3117 * dsl_prop_get_all_impl() returns properties in this 3118 * format. 3119 */ 3120 nvlist_t *attrs; 3121 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3122 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3123 &pair) == 0); 3124 } 3125 3126 /* 3127 * Check that this value is valid for this pool version 3128 */ 3129 switch (prop) { 3130 case ZFS_PROP_COMPRESSION: 3131 /* 3132 * If the user specified gzip compression, make sure 3133 * the SPA supports it. We ignore any errors here since 3134 * we'll catch them later. 3135 */ 3136 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3137 nvpair_value_uint64(pair, &intval) == 0) { 3138 if (intval >= ZIO_COMPRESS_GZIP_1 && 3139 intval <= ZIO_COMPRESS_GZIP_9 && 3140 zfs_earlier_version(dsname, 3141 SPA_VERSION_GZIP_COMPRESSION)) { 3142 return (ENOTSUP); 3143 } 3144 3145 if (intval == ZIO_COMPRESS_ZLE && 3146 zfs_earlier_version(dsname, 3147 SPA_VERSION_ZLE_COMPRESSION)) 3148 return (ENOTSUP); 3149 3150 /* 3151 * If this is a bootable dataset then 3152 * verify that the compression algorithm 3153 * is supported for booting. We must return 3154 * something other than ENOTSUP since it 3155 * implies a downrev pool version. 3156 */ 3157 if (zfs_is_bootfs(dsname) && 3158 !BOOTFS_COMPRESS_VALID(intval)) { 3159 return (ERANGE); 3160 } 3161 } 3162 break; 3163 3164 case ZFS_PROP_COPIES: 3165 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3166 return (ENOTSUP); 3167 break; 3168 3169 case ZFS_PROP_DEDUP: 3170 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3171 return (ENOTSUP); 3172 break; 3173 3174 case ZFS_PROP_SHARESMB: 3175 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3176 return (ENOTSUP); 3177 break; 3178 3179 case ZFS_PROP_ACLINHERIT: 3180 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3181 nvpair_value_uint64(pair, &intval) == 0) { 3182 if (intval == ZFS_ACL_PASSTHROUGH_X && 3183 zfs_earlier_version(dsname, 3184 SPA_VERSION_PASSTHROUGH_X)) 3185 return (ENOTSUP); 3186 } 3187 break; 3188 } 3189 3190 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3191 } 3192 3193 /* 3194 * Removes properties from the given props list that fail permission checks 3195 * needed to clear them and to restore them in case of a receive error. For each 3196 * property, make sure we have both set and inherit permissions. 3197 * 3198 * Returns the first error encountered if any permission checks fail. If the 3199 * caller provides a non-NULL errlist, it also gives the complete list of names 3200 * of all the properties that failed a permission check along with the 3201 * corresponding error numbers. The caller is responsible for freeing the 3202 * returned errlist. 3203 * 3204 * If every property checks out successfully, zero is returned and the list 3205 * pointed at by errlist is NULL. 3206 */ 3207 static int 3208 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 3209 { 3210 zfs_cmd_t *zc; 3211 nvpair_t *pair, *next_pair; 3212 nvlist_t *errors; 3213 int err, rv = 0; 3214 3215 if (props == NULL) 3216 return (0); 3217 3218 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3219 3220 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 3221 (void) strcpy(zc->zc_name, dataset); 3222 pair = nvlist_next_nvpair(props, NULL); 3223 while (pair != NULL) { 3224 next_pair = nvlist_next_nvpair(props, pair); 3225 3226 (void) strcpy(zc->zc_value, nvpair_name(pair)); 3227 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 3228 (err = zfs_secpolicy_inherit(zc, CRED())) != 0) { 3229 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 3230 VERIFY(nvlist_add_int32(errors, 3231 zc->zc_value, err) == 0); 3232 } 3233 pair = next_pair; 3234 } 3235 kmem_free(zc, sizeof (zfs_cmd_t)); 3236 3237 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 3238 nvlist_free(errors); 3239 errors = NULL; 3240 } else { 3241 VERIFY(nvpair_value_int32(pair, &rv) == 0); 3242 } 3243 3244 if (errlist == NULL) 3245 nvlist_free(errors); 3246 else 3247 *errlist = errors; 3248 3249 return (rv); 3250 } 3251 3252 static boolean_t 3253 propval_equals(nvpair_t *p1, nvpair_t *p2) 3254 { 3255 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 3256 /* dsl_prop_get_all_impl() format */ 3257 nvlist_t *attrs; 3258 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 3259 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3260 &p1) == 0); 3261 } 3262 3263 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 3264 nvlist_t *attrs; 3265 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 3266 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3267 &p2) == 0); 3268 } 3269 3270 if (nvpair_type(p1) != nvpair_type(p2)) 3271 return (B_FALSE); 3272 3273 if (nvpair_type(p1) == DATA_TYPE_STRING) { 3274 char *valstr1, *valstr2; 3275 3276 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 3277 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 3278 return (strcmp(valstr1, valstr2) == 0); 3279 } else { 3280 uint64_t intval1, intval2; 3281 3282 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 3283 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 3284 return (intval1 == intval2); 3285 } 3286 } 3287 3288 /* 3289 * Remove properties from props if they are not going to change (as determined 3290 * by comparison with origprops). Remove them from origprops as well, since we 3291 * do not need to clear or restore properties that won't change. 3292 */ 3293 static void 3294 props_reduce(nvlist_t *props, nvlist_t *origprops) 3295 { 3296 nvpair_t *pair, *next_pair; 3297 3298 if (origprops == NULL) 3299 return; /* all props need to be received */ 3300 3301 pair = nvlist_next_nvpair(props, NULL); 3302 while (pair != NULL) { 3303 const char *propname = nvpair_name(pair); 3304 nvpair_t *match; 3305 3306 next_pair = nvlist_next_nvpair(props, pair); 3307 3308 if ((nvlist_lookup_nvpair(origprops, propname, 3309 &match) != 0) || !propval_equals(pair, match)) 3310 goto next; /* need to set received value */ 3311 3312 /* don't clear the existing received value */ 3313 (void) nvlist_remove_nvpair(origprops, match); 3314 /* don't bother receiving the property */ 3315 (void) nvlist_remove_nvpair(props, pair); 3316 next: 3317 pair = next_pair; 3318 } 3319 } 3320 3321 #ifdef DEBUG 3322 static boolean_t zfs_ioc_recv_inject_err; 3323 #endif 3324 3325 /* 3326 * inputs: 3327 * zc_name name of containing filesystem 3328 * zc_nvlist_src{_size} nvlist of properties to apply 3329 * zc_value name of snapshot to create 3330 * zc_string name of clone origin (if DRR_FLAG_CLONE) 3331 * zc_cookie file descriptor to recv from 3332 * zc_begin_record the BEGIN record of the stream (not byteswapped) 3333 * zc_guid force flag 3334 * 3335 * outputs: 3336 * zc_cookie number of bytes read 3337 * zc_nvlist_dst{_size} error for each unapplied received property 3338 * zc_obj zprop_errflags_t 3339 */ 3340 static int 3341 zfs_ioc_recv(zfs_cmd_t *zc) 3342 { 3343 file_t *fp; 3344 objset_t *os; 3345 dmu_recv_cookie_t drc; 3346 boolean_t force = (boolean_t)zc->zc_guid; 3347 int fd; 3348 int error = 0; 3349 int props_error = 0; 3350 nvlist_t *errors; 3351 offset_t off; 3352 nvlist_t *props = NULL; /* sent properties */ 3353 nvlist_t *origprops = NULL; /* existing properties */ 3354 objset_t *origin = NULL; 3355 char *tosnap; 3356 char tofs[ZFS_MAXNAMELEN]; 3357 boolean_t first_recvd_props = B_FALSE; 3358 3359 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3360 strchr(zc->zc_value, '@') == NULL || 3361 strchr(zc->zc_value, '%')) 3362 return (EINVAL); 3363 3364 (void) strcpy(tofs, zc->zc_value); 3365 tosnap = strchr(tofs, '@'); 3366 *tosnap++ = '\0'; 3367 3368 if (zc->zc_nvlist_src != NULL && 3369 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 3370 zc->zc_iflags, &props)) != 0) 3371 return (error); 3372 3373 fd = zc->zc_cookie; 3374 fp = getf(fd); 3375 if (fp == NULL) { 3376 nvlist_free(props); 3377 return (EBADF); 3378 } 3379 3380 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3381 3382 if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) { 3383 if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) && 3384 !dsl_prop_get_hasrecvd(os)) { 3385 first_recvd_props = B_TRUE; 3386 } 3387 3388 /* 3389 * If new received properties are supplied, they are to 3390 * completely replace the existing received properties, so stash 3391 * away the existing ones. 3392 */ 3393 if (dsl_prop_get_received(os, &origprops) == 0) { 3394 nvlist_t *errlist = NULL; 3395 /* 3396 * Don't bother writing a property if its value won't 3397 * change (and avoid the unnecessary security checks). 3398 * 3399 * The first receive after SPA_VERSION_RECVD_PROPS is a 3400 * special case where we blow away all local properties 3401 * regardless. 3402 */ 3403 if (!first_recvd_props) 3404 props_reduce(props, origprops); 3405 if (zfs_check_clearable(tofs, origprops, 3406 &errlist) != 0) 3407 (void) nvlist_merge(errors, errlist, 0); 3408 nvlist_free(errlist); 3409 } 3410 3411 dmu_objset_rele(os, FTAG); 3412 } 3413 3414 if (zc->zc_string[0]) { 3415 error = dmu_objset_hold(zc->zc_string, FTAG, &origin); 3416 if (error) 3417 goto out; 3418 } 3419 3420 error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds, 3421 &zc->zc_begin_record, force, origin, &drc); 3422 if (origin) 3423 dmu_objset_rele(origin, FTAG); 3424 if (error) 3425 goto out; 3426 3427 /* 3428 * Set properties before we receive the stream so that they are applied 3429 * to the new data. Note that we must call dmu_recv_stream() if 3430 * dmu_recv_begin() succeeds. 3431 */ 3432 if (props) { 3433 nvlist_t *errlist; 3434 3435 if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) { 3436 if (drc.drc_newfs) { 3437 if (spa_version(os->os_spa) >= 3438 SPA_VERSION_RECVD_PROPS) 3439 first_recvd_props = B_TRUE; 3440 } else if (origprops != NULL) { 3441 if (clear_received_props(os, tofs, origprops, 3442 first_recvd_props ? NULL : props) != 0) 3443 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3444 } else { 3445 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3446 } 3447 dsl_prop_set_hasrecvd(os); 3448 } else if (!drc.drc_newfs) { 3449 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3450 } 3451 3452 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 3453 props, &errlist); 3454 (void) nvlist_merge(errors, errlist, 0); 3455 nvlist_free(errlist); 3456 } 3457 3458 if (fit_error_list(zc, &errors) != 0 || put_nvlist(zc, errors) != 0) { 3459 /* 3460 * Caller made zc->zc_nvlist_dst less than the minimum expected 3461 * size or supplied an invalid address. 3462 */ 3463 props_error = EINVAL; 3464 } 3465 3466 off = fp->f_offset; 3467 error = dmu_recv_stream(&drc, fp->f_vnode, &off); 3468 3469 if (error == 0) { 3470 zfsvfs_t *zfsvfs = NULL; 3471 3472 if (getzfsvfs(tofs, &zfsvfs) == 0) { 3473 /* online recv */ 3474 int end_err; 3475 3476 error = zfs_suspend_fs(zfsvfs); 3477 /* 3478 * If the suspend fails, then the recv_end will 3479 * likely also fail, and clean up after itself. 3480 */ 3481 end_err = dmu_recv_end(&drc); 3482 if (error == 0) 3483 error = zfs_resume_fs(zfsvfs, tofs); 3484 error = error ? error : end_err; 3485 VFS_RELE(zfsvfs->z_vfs); 3486 } else { 3487 error = dmu_recv_end(&drc); 3488 } 3489 } 3490 3491 zc->zc_cookie = off - fp->f_offset; 3492 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 3493 fp->f_offset = off; 3494 3495 #ifdef DEBUG 3496 if (zfs_ioc_recv_inject_err) { 3497 zfs_ioc_recv_inject_err = B_FALSE; 3498 error = 1; 3499 } 3500 #endif 3501 /* 3502 * On error, restore the original props. 3503 */ 3504 if (error && props) { 3505 if (dmu_objset_hold(tofs, FTAG, &os) == 0) { 3506 if (clear_received_props(os, tofs, props, NULL) != 0) { 3507 /* 3508 * We failed to clear the received properties. 3509 * Since we may have left a $recvd value on the 3510 * system, we can't clear the $hasrecvd flag. 3511 */ 3512 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3513 } else if (first_recvd_props) { 3514 dsl_prop_unset_hasrecvd(os); 3515 } 3516 dmu_objset_rele(os, FTAG); 3517 } else if (!drc.drc_newfs) { 3518 /* We failed to clear the received properties. */ 3519 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3520 } 3521 3522 if (origprops == NULL && !drc.drc_newfs) { 3523 /* We failed to stash the original properties. */ 3524 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3525 } 3526 3527 /* 3528 * dsl_props_set() will not convert RECEIVED to LOCAL on or 3529 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 3530 * explictly if we're restoring local properties cleared in the 3531 * first new-style receive. 3532 */ 3533 if (origprops != NULL && 3534 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 3535 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 3536 origprops, NULL) != 0) { 3537 /* 3538 * We stashed the original properties but failed to 3539 * restore them. 3540 */ 3541 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3542 } 3543 } 3544 out: 3545 nvlist_free(props); 3546 nvlist_free(origprops); 3547 nvlist_free(errors); 3548 releasef(fd); 3549 3550 if (error == 0) 3551 error = props_error; 3552 3553 return (error); 3554 } 3555 3556 /* 3557 * inputs: 3558 * zc_name name of snapshot to send 3559 * zc_value short name of incremental fromsnap (may be empty) 3560 * zc_cookie file descriptor to send stream to 3561 * zc_obj fromorigin flag (mutually exclusive with zc_value) 3562 * 3563 * outputs: none 3564 */ 3565 static int 3566 zfs_ioc_send(zfs_cmd_t *zc) 3567 { 3568 objset_t *fromsnap = NULL; 3569 objset_t *tosnap; 3570 file_t *fp; 3571 int error; 3572 offset_t off; 3573 3574 error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap); 3575 if (error) 3576 return (error); 3577 3578 if (zc->zc_value[0] != '\0') { 3579 char *buf; 3580 char *cp; 3581 3582 buf = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3583 (void) strncpy(buf, zc->zc_name, MAXPATHLEN); 3584 cp = strchr(buf, '@'); 3585 if (cp) 3586 *(cp+1) = 0; 3587 (void) strncat(buf, zc->zc_value, MAXPATHLEN); 3588 error = dmu_objset_hold(buf, FTAG, &fromsnap); 3589 kmem_free(buf, MAXPATHLEN); 3590 if (error) { 3591 dmu_objset_rele(tosnap, FTAG); 3592 return (error); 3593 } 3594 } 3595 3596 fp = getf(zc->zc_cookie); 3597 if (fp == NULL) { 3598 dmu_objset_rele(tosnap, FTAG); 3599 if (fromsnap) 3600 dmu_objset_rele(fromsnap, FTAG); 3601 return (EBADF); 3602 } 3603 3604 off = fp->f_offset; 3605 error = dmu_sendbackup(tosnap, fromsnap, zc->zc_obj, fp->f_vnode, &off); 3606 3607 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 3608 fp->f_offset = off; 3609 releasef(zc->zc_cookie); 3610 if (fromsnap) 3611 dmu_objset_rele(fromsnap, FTAG); 3612 dmu_objset_rele(tosnap, FTAG); 3613 return (error); 3614 } 3615 3616 static int 3617 zfs_ioc_inject_fault(zfs_cmd_t *zc) 3618 { 3619 int id, error; 3620 3621 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 3622 &zc->zc_inject_record); 3623 3624 if (error == 0) 3625 zc->zc_guid = (uint64_t)id; 3626 3627 return (error); 3628 } 3629 3630 static int 3631 zfs_ioc_clear_fault(zfs_cmd_t *zc) 3632 { 3633 return (zio_clear_fault((int)zc->zc_guid)); 3634 } 3635 3636 static int 3637 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 3638 { 3639 int id = (int)zc->zc_guid; 3640 int error; 3641 3642 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 3643 &zc->zc_inject_record); 3644 3645 zc->zc_guid = id; 3646 3647 return (error); 3648 } 3649 3650 static int 3651 zfs_ioc_error_log(zfs_cmd_t *zc) 3652 { 3653 spa_t *spa; 3654 int error; 3655 size_t count = (size_t)zc->zc_nvlist_dst_size; 3656 3657 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 3658 return (error); 3659 3660 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 3661 &count); 3662 if (error == 0) 3663 zc->zc_nvlist_dst_size = count; 3664 else 3665 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 3666 3667 spa_close(spa, FTAG); 3668 3669 return (error); 3670 } 3671 3672 static int 3673 zfs_ioc_clear(zfs_cmd_t *zc) 3674 { 3675 spa_t *spa; 3676 vdev_t *vd; 3677 int error; 3678 3679 /* 3680 * On zpool clear we also fix up missing slogs 3681 */ 3682 mutex_enter(&spa_namespace_lock); 3683 spa = spa_lookup(zc->zc_name); 3684 if (spa == NULL) { 3685 mutex_exit(&spa_namespace_lock); 3686 return (EIO); 3687 } 3688 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 3689 /* we need to let spa_open/spa_load clear the chains */ 3690 spa_set_log_state(spa, SPA_LOG_CLEAR); 3691 } 3692 spa->spa_last_open_failed = 0; 3693 mutex_exit(&spa_namespace_lock); 3694 3695 if (zc->zc_cookie & ZPOOL_NO_REWIND) { 3696 error = spa_open(zc->zc_name, &spa, FTAG); 3697 } else { 3698 nvlist_t *policy; 3699 nvlist_t *config = NULL; 3700 3701 if (zc->zc_nvlist_src == NULL) 3702 return (EINVAL); 3703 3704 if ((error = get_nvlist(zc->zc_nvlist_src, 3705 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 3706 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 3707 policy, &config); 3708 if (config != NULL) { 3709 (void) put_nvlist(zc, config); 3710 nvlist_free(config); 3711 } 3712 nvlist_free(policy); 3713 } 3714 } 3715 3716 if (error) 3717 return (error); 3718 3719 spa_vdev_state_enter(spa, SCL_NONE); 3720 3721 if (zc->zc_guid == 0) { 3722 vd = NULL; 3723 } else { 3724 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 3725 if (vd == NULL) { 3726 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 3727 spa_close(spa, FTAG); 3728 return (ENODEV); 3729 } 3730 } 3731 3732 vdev_clear(spa, vd); 3733 3734 (void) spa_vdev_state_exit(spa, NULL, 0); 3735 3736 /* 3737 * Resume any suspended I/Os. 3738 */ 3739 if (zio_resume(spa) != 0) 3740 error = EIO; 3741 3742 spa_close(spa, FTAG); 3743 3744 return (error); 3745 } 3746 3747 /* 3748 * inputs: 3749 * zc_name name of filesystem 3750 * zc_value name of origin snapshot 3751 * 3752 * outputs: 3753 * zc_string name of conflicting snapshot, if there is one 3754 */ 3755 static int 3756 zfs_ioc_promote(zfs_cmd_t *zc) 3757 { 3758 char *cp; 3759 3760 /* 3761 * We don't need to unmount *all* the origin fs's snapshots, but 3762 * it's easier. 3763 */ 3764 cp = strchr(zc->zc_value, '@'); 3765 if (cp) 3766 *cp = '\0'; 3767 (void) dmu_objset_find(zc->zc_value, 3768 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS); 3769 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 3770 } 3771 3772 /* 3773 * Retrieve a single {user|group}{used|quota}@... property. 3774 * 3775 * inputs: 3776 * zc_name name of filesystem 3777 * zc_objset_type zfs_userquota_prop_t 3778 * zc_value domain name (eg. "S-1-234-567-89") 3779 * zc_guid RID/UID/GID 3780 * 3781 * outputs: 3782 * zc_cookie property value 3783 */ 3784 static int 3785 zfs_ioc_userspace_one(zfs_cmd_t *zc) 3786 { 3787 zfsvfs_t *zfsvfs; 3788 int error; 3789 3790 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 3791 return (EINVAL); 3792 3793 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs); 3794 if (error) 3795 return (error); 3796 3797 error = zfs_userspace_one(zfsvfs, 3798 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 3799 zfsvfs_rele(zfsvfs, FTAG); 3800 3801 return (error); 3802 } 3803 3804 /* 3805 * inputs: 3806 * zc_name name of filesystem 3807 * zc_cookie zap cursor 3808 * zc_objset_type zfs_userquota_prop_t 3809 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 3810 * 3811 * outputs: 3812 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 3813 * zc_cookie zap cursor 3814 */ 3815 static int 3816 zfs_ioc_userspace_many(zfs_cmd_t *zc) 3817 { 3818 zfsvfs_t *zfsvfs; 3819 int bufsize = zc->zc_nvlist_dst_size; 3820 3821 if (bufsize <= 0) 3822 return (ENOMEM); 3823 3824 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs); 3825 if (error) 3826 return (error); 3827 3828 void *buf = kmem_alloc(bufsize, KM_SLEEP); 3829 3830 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 3831 buf, &zc->zc_nvlist_dst_size); 3832 3833 if (error == 0) { 3834 error = xcopyout(buf, 3835 (void *)(uintptr_t)zc->zc_nvlist_dst, 3836 zc->zc_nvlist_dst_size); 3837 } 3838 kmem_free(buf, bufsize); 3839 zfsvfs_rele(zfsvfs, FTAG); 3840 3841 return (error); 3842 } 3843 3844 /* 3845 * inputs: 3846 * zc_name name of filesystem 3847 * 3848 * outputs: 3849 * none 3850 */ 3851 static int 3852 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 3853 { 3854 objset_t *os; 3855 int error = 0; 3856 zfsvfs_t *zfsvfs; 3857 3858 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 3859 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 3860 /* 3861 * If userused is not enabled, it may be because the 3862 * objset needs to be closed & reopened (to grow the 3863 * objset_phys_t). Suspend/resume the fs will do that. 3864 */ 3865 error = zfs_suspend_fs(zfsvfs); 3866 if (error == 0) 3867 error = zfs_resume_fs(zfsvfs, zc->zc_name); 3868 } 3869 if (error == 0) 3870 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 3871 VFS_RELE(zfsvfs->z_vfs); 3872 } else { 3873 /* XXX kind of reading contents without owning */ 3874 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 3875 if (error) 3876 return (error); 3877 3878 error = dmu_objset_userspace_upgrade(os); 3879 dmu_objset_rele(os, FTAG); 3880 } 3881 3882 return (error); 3883 } 3884 3885 /* 3886 * We don't want to have a hard dependency 3887 * against some special symbols in sharefs 3888 * nfs, and smbsrv. Determine them if needed when 3889 * the first file system is shared. 3890 * Neither sharefs, nfs or smbsrv are unloadable modules. 3891 */ 3892 int (*znfsexport_fs)(void *arg); 3893 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 3894 int (*zsmbexport_fs)(void *arg, boolean_t add_share); 3895 3896 int zfs_nfsshare_inited; 3897 int zfs_smbshare_inited; 3898 3899 ddi_modhandle_t nfs_mod; 3900 ddi_modhandle_t sharefs_mod; 3901 ddi_modhandle_t smbsrv_mod; 3902 kmutex_t zfs_share_lock; 3903 3904 static int 3905 zfs_init_sharefs() 3906 { 3907 int error; 3908 3909 ASSERT(MUTEX_HELD(&zfs_share_lock)); 3910 /* Both NFS and SMB shares also require sharetab support. */ 3911 if (sharefs_mod == NULL && ((sharefs_mod = 3912 ddi_modopen("fs/sharefs", 3913 KRTLD_MODE_FIRST, &error)) == NULL)) { 3914 return (ENOSYS); 3915 } 3916 if (zshare_fs == NULL && ((zshare_fs = 3917 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 3918 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 3919 return (ENOSYS); 3920 } 3921 return (0); 3922 } 3923 3924 static int 3925 zfs_ioc_share(zfs_cmd_t *zc) 3926 { 3927 int error; 3928 int opcode; 3929 3930 switch (zc->zc_share.z_sharetype) { 3931 case ZFS_SHARE_NFS: 3932 case ZFS_UNSHARE_NFS: 3933 if (zfs_nfsshare_inited == 0) { 3934 mutex_enter(&zfs_share_lock); 3935 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 3936 KRTLD_MODE_FIRST, &error)) == NULL)) { 3937 mutex_exit(&zfs_share_lock); 3938 return (ENOSYS); 3939 } 3940 if (znfsexport_fs == NULL && 3941 ((znfsexport_fs = (int (*)(void *)) 3942 ddi_modsym(nfs_mod, 3943 "nfs_export", &error)) == NULL)) { 3944 mutex_exit(&zfs_share_lock); 3945 return (ENOSYS); 3946 } 3947 error = zfs_init_sharefs(); 3948 if (error) { 3949 mutex_exit(&zfs_share_lock); 3950 return (ENOSYS); 3951 } 3952 zfs_nfsshare_inited = 1; 3953 mutex_exit(&zfs_share_lock); 3954 } 3955 break; 3956 case ZFS_SHARE_SMB: 3957 case ZFS_UNSHARE_SMB: 3958 if (zfs_smbshare_inited == 0) { 3959 mutex_enter(&zfs_share_lock); 3960 if (smbsrv_mod == NULL && ((smbsrv_mod = 3961 ddi_modopen("drv/smbsrv", 3962 KRTLD_MODE_FIRST, &error)) == NULL)) { 3963 mutex_exit(&zfs_share_lock); 3964 return (ENOSYS); 3965 } 3966 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 3967 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 3968 "smb_server_share", &error)) == NULL)) { 3969 mutex_exit(&zfs_share_lock); 3970 return (ENOSYS); 3971 } 3972 error = zfs_init_sharefs(); 3973 if (error) { 3974 mutex_exit(&zfs_share_lock); 3975 return (ENOSYS); 3976 } 3977 zfs_smbshare_inited = 1; 3978 mutex_exit(&zfs_share_lock); 3979 } 3980 break; 3981 default: 3982 return (EINVAL); 3983 } 3984 3985 switch (zc->zc_share.z_sharetype) { 3986 case ZFS_SHARE_NFS: 3987 case ZFS_UNSHARE_NFS: 3988 if (error = 3989 znfsexport_fs((void *) 3990 (uintptr_t)zc->zc_share.z_exportdata)) 3991 return (error); 3992 break; 3993 case ZFS_SHARE_SMB: 3994 case ZFS_UNSHARE_SMB: 3995 if (error = zsmbexport_fs((void *) 3996 (uintptr_t)zc->zc_share.z_exportdata, 3997 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 3998 B_TRUE: B_FALSE)) { 3999 return (error); 4000 } 4001 break; 4002 } 4003 4004 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 4005 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 4006 SHAREFS_ADD : SHAREFS_REMOVE; 4007 4008 /* 4009 * Add or remove share from sharetab 4010 */ 4011 error = zshare_fs(opcode, 4012 (void *)(uintptr_t)zc->zc_share.z_sharedata, 4013 zc->zc_share.z_sharemax); 4014 4015 return (error); 4016 4017 } 4018 4019 ace_t full_access[] = { 4020 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 4021 }; 4022 4023 /* 4024 * Remove all ACL files in shares dir 4025 */ 4026 static int 4027 zfs_smb_acl_purge(znode_t *dzp) 4028 { 4029 zap_cursor_t zc; 4030 zap_attribute_t zap; 4031 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 4032 int error; 4033 4034 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 4035 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 4036 zap_cursor_advance(&zc)) { 4037 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 4038 NULL, 0)) != 0) 4039 break; 4040 } 4041 zap_cursor_fini(&zc); 4042 return (error); 4043 } 4044 4045 static int 4046 zfs_ioc_smb_acl(zfs_cmd_t *zc) 4047 { 4048 vnode_t *vp; 4049 znode_t *dzp; 4050 vnode_t *resourcevp = NULL; 4051 znode_t *sharedir; 4052 zfsvfs_t *zfsvfs; 4053 nvlist_t *nvlist; 4054 char *src, *target; 4055 vattr_t vattr; 4056 vsecattr_t vsec; 4057 int error = 0; 4058 4059 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 4060 NO_FOLLOW, NULL, &vp)) != 0) 4061 return (error); 4062 4063 /* Now make sure mntpnt and dataset are ZFS */ 4064 4065 if (vp->v_vfsp->vfs_fstype != zfsfstype || 4066 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 4067 zc->zc_name) != 0)) { 4068 VN_RELE(vp); 4069 return (EINVAL); 4070 } 4071 4072 dzp = VTOZ(vp); 4073 zfsvfs = dzp->z_zfsvfs; 4074 ZFS_ENTER(zfsvfs); 4075 4076 /* 4077 * Create share dir if its missing. 4078 */ 4079 mutex_enter(&zfsvfs->z_lock); 4080 if (zfsvfs->z_shares_dir == 0) { 4081 dmu_tx_t *tx; 4082 4083 tx = dmu_tx_create(zfsvfs->z_os); 4084 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 4085 ZFS_SHARES_DIR); 4086 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 4087 error = dmu_tx_assign(tx, TXG_WAIT); 4088 if (error) { 4089 dmu_tx_abort(tx); 4090 } else { 4091 error = zfs_create_share_dir(zfsvfs, tx); 4092 dmu_tx_commit(tx); 4093 } 4094 if (error) { 4095 mutex_exit(&zfsvfs->z_lock); 4096 VN_RELE(vp); 4097 ZFS_EXIT(zfsvfs); 4098 return (error); 4099 } 4100 } 4101 mutex_exit(&zfsvfs->z_lock); 4102 4103 ASSERT(zfsvfs->z_shares_dir); 4104 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 4105 VN_RELE(vp); 4106 ZFS_EXIT(zfsvfs); 4107 return (error); 4108 } 4109 4110 switch (zc->zc_cookie) { 4111 case ZFS_SMB_ACL_ADD: 4112 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 4113 vattr.va_type = VREG; 4114 vattr.va_mode = S_IFREG|0777; 4115 vattr.va_uid = 0; 4116 vattr.va_gid = 0; 4117 4118 vsec.vsa_mask = VSA_ACE; 4119 vsec.vsa_aclentp = &full_access; 4120 vsec.vsa_aclentsz = sizeof (full_access); 4121 vsec.vsa_aclcnt = 1; 4122 4123 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 4124 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 4125 if (resourcevp) 4126 VN_RELE(resourcevp); 4127 break; 4128 4129 case ZFS_SMB_ACL_REMOVE: 4130 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 4131 NULL, 0); 4132 break; 4133 4134 case ZFS_SMB_ACL_RENAME: 4135 if ((error = get_nvlist(zc->zc_nvlist_src, 4136 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 4137 VN_RELE(vp); 4138 ZFS_EXIT(zfsvfs); 4139 return (error); 4140 } 4141 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 4142 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 4143 &target)) { 4144 VN_RELE(vp); 4145 VN_RELE(ZTOV(sharedir)); 4146 ZFS_EXIT(zfsvfs); 4147 nvlist_free(nvlist); 4148 return (error); 4149 } 4150 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 4151 kcred, NULL, 0); 4152 nvlist_free(nvlist); 4153 break; 4154 4155 case ZFS_SMB_ACL_PURGE: 4156 error = zfs_smb_acl_purge(sharedir); 4157 break; 4158 4159 default: 4160 error = EINVAL; 4161 break; 4162 } 4163 4164 VN_RELE(vp); 4165 VN_RELE(ZTOV(sharedir)); 4166 4167 ZFS_EXIT(zfsvfs); 4168 4169 return (error); 4170 } 4171 4172 /* 4173 * inputs: 4174 * zc_name name of filesystem 4175 * zc_value short name of snap 4176 * zc_string user-supplied tag for this reference 4177 * zc_cookie recursive flag 4178 * zc_temphold set if hold is temporary 4179 * 4180 * outputs: none 4181 */ 4182 static int 4183 zfs_ioc_hold(zfs_cmd_t *zc) 4184 { 4185 boolean_t recursive = zc->zc_cookie; 4186 4187 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 4188 return (EINVAL); 4189 4190 return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value, 4191 zc->zc_string, recursive, zc->zc_temphold)); 4192 } 4193 4194 /* 4195 * inputs: 4196 * zc_name name of dataset from which we're releasing a user reference 4197 * zc_value short name of snap 4198 * zc_string user-supplied tag for this reference 4199 * zc_cookie recursive flag 4200 * 4201 * outputs: none 4202 */ 4203 static int 4204 zfs_ioc_release(zfs_cmd_t *zc) 4205 { 4206 boolean_t recursive = zc->zc_cookie; 4207 4208 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 4209 return (EINVAL); 4210 4211 return (dsl_dataset_user_release(zc->zc_name, zc->zc_value, 4212 zc->zc_string, recursive)); 4213 } 4214 4215 /* 4216 * inputs: 4217 * zc_name name of filesystem 4218 * 4219 * outputs: 4220 * zc_nvlist_src{_size} nvlist of snapshot holds 4221 */ 4222 static int 4223 zfs_ioc_get_holds(zfs_cmd_t *zc) 4224 { 4225 nvlist_t *nvp; 4226 int error; 4227 4228 if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) { 4229 error = put_nvlist(zc, nvp); 4230 nvlist_free(nvp); 4231 } 4232 4233 return (error); 4234 } 4235 4236 /* 4237 * pool create, destroy, and export don't log the history as part of 4238 * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export 4239 * do the logging of those commands. 4240 */ 4241 static zfs_ioc_vec_t zfs_ioc_vec[] = { 4242 { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4243 B_FALSE }, 4244 { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4245 B_FALSE }, 4246 { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4247 B_FALSE }, 4248 { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4249 B_FALSE }, 4250 { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE, 4251 B_FALSE }, 4252 { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE, 4253 B_FALSE }, 4254 { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE, 4255 B_FALSE }, 4256 { zfs_ioc_pool_scrub, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4257 B_TRUE }, 4258 { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE, 4259 B_FALSE }, 4260 { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4261 B_TRUE }, 4262 { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4263 B_FALSE }, 4264 { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4265 B_TRUE }, 4266 { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4267 B_TRUE }, 4268 { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4269 B_FALSE }, 4270 { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4271 B_TRUE }, 4272 { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4273 B_TRUE }, 4274 { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4275 B_TRUE }, 4276 { zfs_ioc_vdev_setfru, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4277 B_TRUE }, 4278 { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4279 B_TRUE }, 4280 { zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4281 B_FALSE }, 4282 { zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4283 B_TRUE }, 4284 { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4285 B_TRUE }, 4286 { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE, B_TRUE }, 4287 { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE, B_TRUE }, 4288 { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE, 4289 B_TRUE}, 4290 { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE, 4291 B_TRUE }, 4292 { zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE, B_TRUE }, 4293 { zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE, B_TRUE }, 4294 { zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE, B_FALSE }, 4295 { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4296 B_FALSE }, 4297 { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4298 B_FALSE }, 4299 { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4300 B_FALSE }, 4301 { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE, 4302 B_FALSE }, 4303 { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE, B_FALSE }, 4304 { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE, 4305 B_TRUE }, 4306 { zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, DATASET_NAME, 4307 B_TRUE, B_TRUE }, 4308 { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE, 4309 B_TRUE }, 4310 { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4311 B_FALSE }, 4312 { zfs_ioc_obj_to_path, zfs_secpolicy_config, DATASET_NAME, B_FALSE, 4313 B_TRUE }, 4314 { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4315 B_TRUE }, 4316 { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE, 4317 B_FALSE }, 4318 { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE, 4319 B_TRUE }, 4320 { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4321 B_FALSE }, 4322 { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE, B_FALSE }, 4323 { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE, 4324 B_TRUE }, 4325 { zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE, 4326 B_FALSE }, 4327 { zfs_ioc_userspace_one, zfs_secpolicy_userspace_one, 4328 DATASET_NAME, B_FALSE, B_FALSE }, 4329 { zfs_ioc_userspace_many, zfs_secpolicy_userspace_many, 4330 DATASET_NAME, B_FALSE, B_FALSE }, 4331 { zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 4332 DATASET_NAME, B_FALSE, B_TRUE }, 4333 { zfs_ioc_hold, zfs_secpolicy_hold, DATASET_NAME, B_TRUE, B_TRUE }, 4334 { zfs_ioc_release, zfs_secpolicy_release, DATASET_NAME, B_TRUE, 4335 B_TRUE }, 4336 { zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4337 B_TRUE }, 4338 { zfs_ioc_objset_recvd_props, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4339 B_FALSE }, 4340 { zfs_ioc_vdev_split, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4341 B_TRUE } 4342 }; 4343 4344 int 4345 pool_status_check(const char *name, zfs_ioc_namecheck_t type) 4346 { 4347 spa_t *spa; 4348 int error; 4349 4350 ASSERT(type == POOL_NAME || type == DATASET_NAME); 4351 4352 error = spa_open(name, &spa, FTAG); 4353 if (error == 0) { 4354 if (spa_suspended(spa)) 4355 error = EAGAIN; 4356 spa_close(spa, FTAG); 4357 } 4358 return (error); 4359 } 4360 4361 static int 4362 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 4363 { 4364 zfs_cmd_t *zc; 4365 uint_t vec; 4366 int error, rc; 4367 4368 if (getminor(dev) != 0) 4369 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 4370 4371 vec = cmd - ZFS_IOC; 4372 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 4373 4374 if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 4375 return (EINVAL); 4376 4377 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 4378 4379 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 4380 if (error != 0) 4381 error = EFAULT; 4382 4383 if ((error == 0) && !(flag & FKIOCTL)) 4384 error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr); 4385 4386 /* 4387 * Ensure that all pool/dataset names are valid before we pass down to 4388 * the lower layers. 4389 */ 4390 if (error == 0) { 4391 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 4392 zc->zc_iflags = flag & FKIOCTL; 4393 switch (zfs_ioc_vec[vec].zvec_namecheck) { 4394 case POOL_NAME: 4395 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 4396 error = EINVAL; 4397 if (zfs_ioc_vec[vec].zvec_pool_check) 4398 error = pool_status_check(zc->zc_name, 4399 zfs_ioc_vec[vec].zvec_namecheck); 4400 break; 4401 4402 case DATASET_NAME: 4403 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 4404 error = EINVAL; 4405 if (zfs_ioc_vec[vec].zvec_pool_check) 4406 error = pool_status_check(zc->zc_name, 4407 zfs_ioc_vec[vec].zvec_namecheck); 4408 break; 4409 4410 case NO_NAME: 4411 break; 4412 } 4413 } 4414 4415 if (error == 0) 4416 error = zfs_ioc_vec[vec].zvec_func(zc); 4417 4418 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 4419 if (error == 0) { 4420 if (rc != 0) 4421 error = EFAULT; 4422 if (zfs_ioc_vec[vec].zvec_his_log) 4423 zfs_log_history(zc); 4424 } 4425 4426 kmem_free(zc, sizeof (zfs_cmd_t)); 4427 return (error); 4428 } 4429 4430 static int 4431 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 4432 { 4433 if (cmd != DDI_ATTACH) 4434 return (DDI_FAILURE); 4435 4436 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 4437 DDI_PSEUDO, 0) == DDI_FAILURE) 4438 return (DDI_FAILURE); 4439 4440 zfs_dip = dip; 4441 4442 ddi_report_dev(dip); 4443 4444 return (DDI_SUCCESS); 4445 } 4446 4447 static int 4448 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 4449 { 4450 if (spa_busy() || zfs_busy() || zvol_busy()) 4451 return (DDI_FAILURE); 4452 4453 if (cmd != DDI_DETACH) 4454 return (DDI_FAILURE); 4455 4456 zfs_dip = NULL; 4457 4458 ddi_prop_remove_all(dip); 4459 ddi_remove_minor_node(dip, NULL); 4460 4461 return (DDI_SUCCESS); 4462 } 4463 4464 /*ARGSUSED*/ 4465 static int 4466 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 4467 { 4468 switch (infocmd) { 4469 case DDI_INFO_DEVT2DEVINFO: 4470 *result = zfs_dip; 4471 return (DDI_SUCCESS); 4472 4473 case DDI_INFO_DEVT2INSTANCE: 4474 *result = (void *)0; 4475 return (DDI_SUCCESS); 4476 } 4477 4478 return (DDI_FAILURE); 4479 } 4480 4481 /* 4482 * OK, so this is a little weird. 4483 * 4484 * /dev/zfs is the control node, i.e. minor 0. 4485 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 4486 * 4487 * /dev/zfs has basically nothing to do except serve up ioctls, 4488 * so most of the standard driver entry points are in zvol.c. 4489 */ 4490 static struct cb_ops zfs_cb_ops = { 4491 zvol_open, /* open */ 4492 zvol_close, /* close */ 4493 zvol_strategy, /* strategy */ 4494 nodev, /* print */ 4495 zvol_dump, /* dump */ 4496 zvol_read, /* read */ 4497 zvol_write, /* write */ 4498 zfsdev_ioctl, /* ioctl */ 4499 nodev, /* devmap */ 4500 nodev, /* mmap */ 4501 nodev, /* segmap */ 4502 nochpoll, /* poll */ 4503 ddi_prop_op, /* prop_op */ 4504 NULL, /* streamtab */ 4505 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 4506 CB_REV, /* version */ 4507 nodev, /* async read */ 4508 nodev, /* async write */ 4509 }; 4510 4511 static struct dev_ops zfs_dev_ops = { 4512 DEVO_REV, /* version */ 4513 0, /* refcnt */ 4514 zfs_info, /* info */ 4515 nulldev, /* identify */ 4516 nulldev, /* probe */ 4517 zfs_attach, /* attach */ 4518 zfs_detach, /* detach */ 4519 nodev, /* reset */ 4520 &zfs_cb_ops, /* driver operations */ 4521 NULL, /* no bus operations */ 4522 NULL, /* power */ 4523 ddi_quiesce_not_needed, /* quiesce */ 4524 }; 4525 4526 static struct modldrv zfs_modldrv = { 4527 &mod_driverops, 4528 "ZFS storage pool", 4529 &zfs_dev_ops 4530 }; 4531 4532 static struct modlinkage modlinkage = { 4533 MODREV_1, 4534 (void *)&zfs_modlfs, 4535 (void *)&zfs_modldrv, 4536 NULL 4537 }; 4538 4539 4540 uint_t zfs_fsyncer_key; 4541 extern uint_t rrw_tsd_key; 4542 4543 int 4544 _init(void) 4545 { 4546 int error; 4547 4548 spa_init(FREAD | FWRITE); 4549 zfs_init(); 4550 zvol_init(); 4551 4552 if ((error = mod_install(&modlinkage)) != 0) { 4553 zvol_fini(); 4554 zfs_fini(); 4555 spa_fini(); 4556 return (error); 4557 } 4558 4559 tsd_create(&zfs_fsyncer_key, NULL); 4560 tsd_create(&rrw_tsd_key, NULL); 4561 4562 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 4563 ASSERT(error == 0); 4564 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 4565 4566 return (0); 4567 } 4568 4569 int 4570 _fini(void) 4571 { 4572 int error; 4573 4574 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 4575 return (EBUSY); 4576 4577 if ((error = mod_remove(&modlinkage)) != 0) 4578 return (error); 4579 4580 zvol_fini(); 4581 zfs_fini(); 4582 spa_fini(); 4583 if (zfs_nfsshare_inited) 4584 (void) ddi_modclose(nfs_mod); 4585 if (zfs_smbshare_inited) 4586 (void) ddi_modclose(smbsrv_mod); 4587 if (zfs_nfsshare_inited || zfs_smbshare_inited) 4588 (void) ddi_modclose(sharefs_mod); 4589 4590 tsd_destroy(&zfs_fsyncer_key); 4591 ldi_ident_release(zfs_li); 4592 zfs_li = NULL; 4593 mutex_destroy(&zfs_share_lock); 4594 4595 return (error); 4596 } 4597 4598 int 4599 _info(struct modinfo *modinfop) 4600 { 4601 return (mod_info(&modlinkage, modinfop)); 4602 } 4603