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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Portions Copyright 2011 Martin Matuska 24 */ 25 /* 26 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 27 * Copyright (c) 2011 by Delphix. All rights reserved. 28 */ 29 30 #include <sys/types.h> 31 #include <sys/param.h> 32 #include <sys/errno.h> 33 #include <sys/uio.h> 34 #include <sys/buf.h> 35 #include <sys/modctl.h> 36 #include <sys/open.h> 37 #include <sys/file.h> 38 #include <sys/kmem.h> 39 #include <sys/conf.h> 40 #include <sys/cmn_err.h> 41 #include <sys/stat.h> 42 #include <sys/zfs_ioctl.h> 43 #include <sys/zfs_vfsops.h> 44 #include <sys/zfs_znode.h> 45 #include <sys/zap.h> 46 #include <sys/spa.h> 47 #include <sys/spa_impl.h> 48 #include <sys/vdev.h> 49 #include <sys/priv_impl.h> 50 #include <sys/dmu.h> 51 #include <sys/dsl_dir.h> 52 #include <sys/dsl_dataset.h> 53 #include <sys/dsl_prop.h> 54 #include <sys/dsl_deleg.h> 55 #include <sys/dmu_objset.h> 56 #include <sys/ddi.h> 57 #include <sys/sunddi.h> 58 #include <sys/sunldi.h> 59 #include <sys/policy.h> 60 #include <sys/zone.h> 61 #include <sys/nvpair.h> 62 #include <sys/pathname.h> 63 #include <sys/mount.h> 64 #include <sys/sdt.h> 65 #include <sys/fs/zfs.h> 66 #include <sys/zfs_ctldir.h> 67 #include <sys/zfs_dir.h> 68 #include <sys/zfs_onexit.h> 69 #include <sys/zvol.h> 70 #include <sys/dsl_scan.h> 71 #include <sharefs/share.h> 72 #include <sys/dmu_objset.h> 73 74 #include "zfs_namecheck.h" 75 #include "zfs_prop.h" 76 #include "zfs_deleg.h" 77 #include "zfs_comutil.h" 78 79 extern struct modlfs zfs_modlfs; 80 81 extern void zfs_init(void); 82 extern void zfs_fini(void); 83 84 ldi_ident_t zfs_li = NULL; 85 dev_info_t *zfs_dip; 86 87 typedef int zfs_ioc_func_t(zfs_cmd_t *); 88 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, cred_t *); 89 90 typedef enum { 91 NO_NAME, 92 POOL_NAME, 93 DATASET_NAME 94 } zfs_ioc_namecheck_t; 95 96 typedef enum { 97 POOL_CHECK_NONE = 1 << 0, 98 POOL_CHECK_SUSPENDED = 1 << 1, 99 POOL_CHECK_READONLY = 1 << 2 100 } zfs_ioc_poolcheck_t; 101 102 typedef struct zfs_ioc_vec { 103 zfs_ioc_func_t *zvec_func; 104 zfs_secpolicy_func_t *zvec_secpolicy; 105 zfs_ioc_namecheck_t zvec_namecheck; 106 boolean_t zvec_his_log; 107 zfs_ioc_poolcheck_t zvec_pool_check; 108 } zfs_ioc_vec_t; 109 110 /* This array is indexed by zfs_userquota_prop_t */ 111 static const char *userquota_perms[] = { 112 ZFS_DELEG_PERM_USERUSED, 113 ZFS_DELEG_PERM_USERQUOTA, 114 ZFS_DELEG_PERM_GROUPUSED, 115 ZFS_DELEG_PERM_GROUPQUOTA, 116 }; 117 118 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc); 119 static int zfs_check_settable(const char *name, nvpair_t *property, 120 cred_t *cr); 121 static int zfs_check_clearable(char *dataset, nvlist_t *props, 122 nvlist_t **errors); 123 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *, 124 boolean_t *); 125 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t **); 126 127 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ 128 void 129 __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 130 { 131 const char *newfile; 132 char buf[512]; 133 va_list adx; 134 135 /* 136 * Get rid of annoying "../common/" prefix to filename. 137 */ 138 newfile = strrchr(file, '/'); 139 if (newfile != NULL) { 140 newfile = newfile + 1; /* Get rid of leading / */ 141 } else { 142 newfile = file; 143 } 144 145 va_start(adx, fmt); 146 (void) vsnprintf(buf, sizeof (buf), fmt, adx); 147 va_end(adx); 148 149 /* 150 * To get this data, use the zfs-dprintf probe as so: 151 * dtrace -q -n 'zfs-dprintf \ 152 * /stringof(arg0) == "dbuf.c"/ \ 153 * {printf("%s: %s", stringof(arg1), stringof(arg3))}' 154 * arg0 = file name 155 * arg1 = function name 156 * arg2 = line number 157 * arg3 = message 158 */ 159 DTRACE_PROBE4(zfs__dprintf, 160 char *, newfile, char *, func, int, line, char *, buf); 161 } 162 163 static void 164 history_str_free(char *buf) 165 { 166 kmem_free(buf, HIS_MAX_RECORD_LEN); 167 } 168 169 static char * 170 history_str_get(zfs_cmd_t *zc) 171 { 172 char *buf; 173 174 if (zc->zc_history == NULL) 175 return (NULL); 176 177 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); 178 if (copyinstr((void *)(uintptr_t)zc->zc_history, 179 buf, HIS_MAX_RECORD_LEN, NULL) != 0) { 180 history_str_free(buf); 181 return (NULL); 182 } 183 184 buf[HIS_MAX_RECORD_LEN -1] = '\0'; 185 186 return (buf); 187 } 188 189 /* 190 * Check to see if the named dataset is currently defined as bootable 191 */ 192 static boolean_t 193 zfs_is_bootfs(const char *name) 194 { 195 objset_t *os; 196 197 if (dmu_objset_hold(name, FTAG, &os) == 0) { 198 boolean_t ret; 199 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os))); 200 dmu_objset_rele(os, FTAG); 201 return (ret); 202 } 203 return (B_FALSE); 204 } 205 206 /* 207 * zfs_earlier_version 208 * 209 * Return non-zero if the spa version is less than requested version. 210 */ 211 static int 212 zfs_earlier_version(const char *name, int version) 213 { 214 spa_t *spa; 215 216 if (spa_open(name, &spa, FTAG) == 0) { 217 if (spa_version(spa) < version) { 218 spa_close(spa, FTAG); 219 return (1); 220 } 221 spa_close(spa, FTAG); 222 } 223 return (0); 224 } 225 226 /* 227 * zpl_earlier_version 228 * 229 * Return TRUE if the ZPL version is less than requested version. 230 */ 231 static boolean_t 232 zpl_earlier_version(const char *name, int version) 233 { 234 objset_t *os; 235 boolean_t rc = B_TRUE; 236 237 if (dmu_objset_hold(name, FTAG, &os) == 0) { 238 uint64_t zplversion; 239 240 if (dmu_objset_type(os) != DMU_OST_ZFS) { 241 dmu_objset_rele(os, FTAG); 242 return (B_TRUE); 243 } 244 /* XXX reading from non-owned objset */ 245 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0) 246 rc = zplversion < version; 247 dmu_objset_rele(os, FTAG); 248 } 249 return (rc); 250 } 251 252 static void 253 zfs_log_history(zfs_cmd_t *zc) 254 { 255 spa_t *spa; 256 char *buf; 257 258 if ((buf = history_str_get(zc)) == NULL) 259 return; 260 261 if (spa_open(zc->zc_name, &spa, FTAG) == 0) { 262 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) 263 (void) spa_history_log(spa, buf, LOG_CMD_NORMAL); 264 spa_close(spa, FTAG); 265 } 266 history_str_free(buf); 267 } 268 269 /* 270 * Policy for top-level read operations (list pools). Requires no privileges, 271 * and can be used in the local zone, as there is no associated dataset. 272 */ 273 /* ARGSUSED */ 274 static int 275 zfs_secpolicy_none(zfs_cmd_t *zc, cred_t *cr) 276 { 277 return (0); 278 } 279 280 /* 281 * Policy for dataset read operations (list children, get statistics). Requires 282 * no privileges, but must be visible in the local zone. 283 */ 284 /* ARGSUSED */ 285 static int 286 zfs_secpolicy_read(zfs_cmd_t *zc, cred_t *cr) 287 { 288 if (INGLOBALZONE(curproc) || 289 zone_dataset_visible(zc->zc_name, NULL)) 290 return (0); 291 292 return (ENOENT); 293 } 294 295 static int 296 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr) 297 { 298 int writable = 1; 299 300 /* 301 * The dataset must be visible by this zone -- check this first 302 * so they don't see EPERM on something they shouldn't know about. 303 */ 304 if (!INGLOBALZONE(curproc) && 305 !zone_dataset_visible(dataset, &writable)) 306 return (ENOENT); 307 308 if (INGLOBALZONE(curproc)) { 309 /* 310 * If the fs is zoned, only root can access it from the 311 * global zone. 312 */ 313 if (secpolicy_zfs(cr) && zoned) 314 return (EPERM); 315 } else { 316 /* 317 * If we are in a local zone, the 'zoned' property must be set. 318 */ 319 if (!zoned) 320 return (EPERM); 321 322 /* must be writable by this zone */ 323 if (!writable) 324 return (EPERM); 325 } 326 return (0); 327 } 328 329 static int 330 zfs_dozonecheck(const char *dataset, cred_t *cr) 331 { 332 uint64_t zoned; 333 334 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL)) 335 return (ENOENT); 336 337 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 338 } 339 340 static int 341 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr) 342 { 343 uint64_t zoned; 344 345 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER); 346 if (dsl_prop_get_ds(ds, "zoned", 8, 1, &zoned, NULL)) { 347 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); 348 return (ENOENT); 349 } 350 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock); 351 352 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 353 } 354 355 int 356 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) 357 { 358 int error; 359 360 error = zfs_dozonecheck(name, cr); 361 if (error == 0) { 362 error = secpolicy_zfs(cr); 363 if (error) 364 error = dsl_deleg_access(name, perm, cr); 365 } 366 return (error); 367 } 368 369 int 370 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds, 371 const char *perm, cred_t *cr) 372 { 373 int error; 374 375 error = zfs_dozonecheck_ds(name, ds, cr); 376 if (error == 0) { 377 error = secpolicy_zfs(cr); 378 if (error) 379 error = dsl_deleg_access_impl(ds, perm, cr); 380 } 381 return (error); 382 } 383 384 /* 385 * Policy for setting the security label property. 386 * 387 * Returns 0 for success, non-zero for access and other errors. 388 */ 389 static int 390 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr) 391 { 392 char ds_hexsl[MAXNAMELEN]; 393 bslabel_t ds_sl, new_sl; 394 boolean_t new_default = FALSE; 395 uint64_t zoned; 396 int needed_priv = -1; 397 int error; 398 399 /* First get the existing dataset label. */ 400 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 401 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 402 if (error) 403 return (EPERM); 404 405 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 406 new_default = TRUE; 407 408 /* The label must be translatable */ 409 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0)) 410 return (EINVAL); 411 412 /* 413 * In a non-global zone, disallow attempts to set a label that 414 * doesn't match that of the zone; otherwise no other checks 415 * are needed. 416 */ 417 if (!INGLOBALZONE(curproc)) { 418 if (new_default || !blequal(&new_sl, CR_SL(CRED()))) 419 return (EPERM); 420 return (0); 421 } 422 423 /* 424 * For global-zone datasets (i.e., those whose zoned property is 425 * "off", verify that the specified new label is valid for the 426 * global zone. 427 */ 428 if (dsl_prop_get_integer(name, 429 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 430 return (EPERM); 431 if (!zoned) { 432 if (zfs_check_global_label(name, strval) != 0) 433 return (EPERM); 434 } 435 436 /* 437 * If the existing dataset label is nondefault, check if the 438 * dataset is mounted (label cannot be changed while mounted). 439 * Get the zfsvfs; if there isn't one, then the dataset isn't 440 * mounted (or isn't a dataset, doesn't exist, ...). 441 */ 442 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) { 443 objset_t *os; 444 static char *setsl_tag = "setsl_tag"; 445 446 /* 447 * Try to own the dataset; abort if there is any error, 448 * (e.g., already mounted, in use, or other error). 449 */ 450 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE, 451 setsl_tag, &os); 452 if (error) 453 return (EPERM); 454 455 dmu_objset_disown(os, setsl_tag); 456 457 if (new_default) { 458 needed_priv = PRIV_FILE_DOWNGRADE_SL; 459 goto out_check; 460 } 461 462 if (hexstr_to_label(strval, &new_sl) != 0) 463 return (EPERM); 464 465 if (blstrictdom(&ds_sl, &new_sl)) 466 needed_priv = PRIV_FILE_DOWNGRADE_SL; 467 else if (blstrictdom(&new_sl, &ds_sl)) 468 needed_priv = PRIV_FILE_UPGRADE_SL; 469 } else { 470 /* dataset currently has a default label */ 471 if (!new_default) 472 needed_priv = PRIV_FILE_UPGRADE_SL; 473 } 474 475 out_check: 476 if (needed_priv != -1) 477 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL)); 478 return (0); 479 } 480 481 static int 482 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval, 483 cred_t *cr) 484 { 485 char *strval; 486 487 /* 488 * Check permissions for special properties. 489 */ 490 switch (prop) { 491 case ZFS_PROP_ZONED: 492 /* 493 * Disallow setting of 'zoned' from within a local zone. 494 */ 495 if (!INGLOBALZONE(curproc)) 496 return (EPERM); 497 break; 498 499 case ZFS_PROP_QUOTA: 500 if (!INGLOBALZONE(curproc)) { 501 uint64_t zoned; 502 char setpoint[MAXNAMELEN]; 503 /* 504 * Unprivileged users are allowed to modify the 505 * quota on things *under* (ie. contained by) 506 * the thing they own. 507 */ 508 if (dsl_prop_get_integer(dsname, "zoned", &zoned, 509 setpoint)) 510 return (EPERM); 511 if (!zoned || strlen(dsname) <= strlen(setpoint)) 512 return (EPERM); 513 } 514 break; 515 516 case ZFS_PROP_MLSLABEL: 517 if (!is_system_labeled()) 518 return (EPERM); 519 520 if (nvpair_value_string(propval, &strval) == 0) { 521 int err; 522 523 err = zfs_set_slabel_policy(dsname, strval, CRED()); 524 if (err != 0) 525 return (err); 526 } 527 break; 528 } 529 530 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr)); 531 } 532 533 int 534 zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr) 535 { 536 int error; 537 538 error = zfs_dozonecheck(zc->zc_name, cr); 539 if (error) 540 return (error); 541 542 /* 543 * permission to set permissions will be evaluated later in 544 * dsl_deleg_can_allow() 545 */ 546 return (0); 547 } 548 549 int 550 zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr) 551 { 552 return (zfs_secpolicy_write_perms(zc->zc_name, 553 ZFS_DELEG_PERM_ROLLBACK, cr)); 554 } 555 556 int 557 zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr) 558 { 559 spa_t *spa; 560 dsl_pool_t *dp; 561 dsl_dataset_t *ds; 562 char *cp; 563 int error; 564 565 /* 566 * Generate the current snapshot name from the given objsetid, then 567 * use that name for the secpolicy/zone checks. 568 */ 569 cp = strchr(zc->zc_name, '@'); 570 if (cp == NULL) 571 return (EINVAL); 572 error = spa_open(zc->zc_name, &spa, FTAG); 573 if (error) 574 return (error); 575 576 dp = spa_get_dsl(spa); 577 rw_enter(&dp->dp_config_rwlock, RW_READER); 578 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 579 rw_exit(&dp->dp_config_rwlock); 580 spa_close(spa, FTAG); 581 if (error) 582 return (error); 583 584 dsl_dataset_name(ds, zc->zc_name); 585 586 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds, 587 ZFS_DELEG_PERM_SEND, cr); 588 dsl_dataset_rele(ds, FTAG); 589 590 return (error); 591 } 592 593 static int 594 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, cred_t *cr) 595 { 596 vnode_t *vp; 597 int error; 598 599 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 600 NO_FOLLOW, NULL, &vp)) != 0) 601 return (error); 602 603 /* Now make sure mntpnt and dataset are ZFS */ 604 605 if (vp->v_vfsp->vfs_fstype != zfsfstype || 606 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 607 zc->zc_name) != 0)) { 608 VN_RELE(vp); 609 return (EPERM); 610 } 611 612 VN_RELE(vp); 613 return (dsl_deleg_access(zc->zc_name, 614 ZFS_DELEG_PERM_SHARE, cr)); 615 } 616 617 int 618 zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr) 619 { 620 if (!INGLOBALZONE(curproc)) 621 return (EPERM); 622 623 if (secpolicy_nfs(cr) == 0) { 624 return (0); 625 } else { 626 return (zfs_secpolicy_deleg_share(zc, cr)); 627 } 628 } 629 630 int 631 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, cred_t *cr) 632 { 633 if (!INGLOBALZONE(curproc)) 634 return (EPERM); 635 636 if (secpolicy_smb(cr) == 0) { 637 return (0); 638 } else { 639 return (zfs_secpolicy_deleg_share(zc, cr)); 640 } 641 } 642 643 static int 644 zfs_get_parent(const char *datasetname, char *parent, int parentsize) 645 { 646 char *cp; 647 648 /* 649 * Remove the @bla or /bla from the end of the name to get the parent. 650 */ 651 (void) strncpy(parent, datasetname, parentsize); 652 cp = strrchr(parent, '@'); 653 if (cp != NULL) { 654 cp[0] = '\0'; 655 } else { 656 cp = strrchr(parent, '/'); 657 if (cp == NULL) 658 return (ENOENT); 659 cp[0] = '\0'; 660 } 661 662 return (0); 663 } 664 665 int 666 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 667 { 668 int error; 669 670 if ((error = zfs_secpolicy_write_perms(name, 671 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 672 return (error); 673 674 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); 675 } 676 677 static int 678 zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr) 679 { 680 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); 681 } 682 683 /* 684 * Destroying snapshots with delegated permissions requires 685 * descendent mount and destroy permissions. 686 * Reassemble the full filesystem@snap name so dsl_deleg_access() 687 * can do the correct permission check. 688 * 689 * Since this routine is used when doing a recursive destroy of snapshots 690 * and destroying snapshots requires descendent permissions, a successfull 691 * check of the top level snapshot applies to snapshots of all descendent 692 * datasets as well. 693 */ 694 static int 695 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, cred_t *cr) 696 { 697 int error; 698 char *dsname; 699 700 dsname = kmem_asprintf("%s@%s", zc->zc_name, zc->zc_value); 701 702 error = zfs_secpolicy_destroy_perms(dsname, cr); 703 704 strfree(dsname); 705 return (error); 706 } 707 708 int 709 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 710 { 711 char parentname[MAXNAMELEN]; 712 int error; 713 714 if ((error = zfs_secpolicy_write_perms(from, 715 ZFS_DELEG_PERM_RENAME, cr)) != 0) 716 return (error); 717 718 if ((error = zfs_secpolicy_write_perms(from, 719 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 720 return (error); 721 722 if ((error = zfs_get_parent(to, parentname, 723 sizeof (parentname))) != 0) 724 return (error); 725 726 if ((error = zfs_secpolicy_write_perms(parentname, 727 ZFS_DELEG_PERM_CREATE, cr)) != 0) 728 return (error); 729 730 if ((error = zfs_secpolicy_write_perms(parentname, 731 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 732 return (error); 733 734 return (error); 735 } 736 737 static int 738 zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr) 739 { 740 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); 741 } 742 743 static int 744 zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr) 745 { 746 char parentname[MAXNAMELEN]; 747 objset_t *clone; 748 int error; 749 750 error = zfs_secpolicy_write_perms(zc->zc_name, 751 ZFS_DELEG_PERM_PROMOTE, cr); 752 if (error) 753 return (error); 754 755 error = dmu_objset_hold(zc->zc_name, FTAG, &clone); 756 757 if (error == 0) { 758 dsl_dataset_t *pclone = NULL; 759 dsl_dir_t *dd; 760 dd = clone->os_dsl_dataset->ds_dir; 761 762 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); 763 error = dsl_dataset_hold_obj(dd->dd_pool, 764 dd->dd_phys->dd_origin_obj, FTAG, &pclone); 765 rw_exit(&dd->dd_pool->dp_config_rwlock); 766 if (error) { 767 dmu_objset_rele(clone, FTAG); 768 return (error); 769 } 770 771 error = zfs_secpolicy_write_perms(zc->zc_name, 772 ZFS_DELEG_PERM_MOUNT, cr); 773 774 dsl_dataset_name(pclone, parentname); 775 dmu_objset_rele(clone, FTAG); 776 dsl_dataset_rele(pclone, FTAG); 777 if (error == 0) 778 error = zfs_secpolicy_write_perms(parentname, 779 ZFS_DELEG_PERM_PROMOTE, cr); 780 } 781 return (error); 782 } 783 784 static int 785 zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr) 786 { 787 int error; 788 789 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 790 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 791 return (error); 792 793 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 794 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 795 return (error); 796 797 return (zfs_secpolicy_write_perms(zc->zc_name, 798 ZFS_DELEG_PERM_CREATE, cr)); 799 } 800 801 int 802 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 803 { 804 return (zfs_secpolicy_write_perms(name, 805 ZFS_DELEG_PERM_SNAPSHOT, cr)); 806 } 807 808 static int 809 zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr) 810 { 811 812 return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr)); 813 } 814 815 static int 816 zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr) 817 { 818 char parentname[MAXNAMELEN]; 819 int error; 820 821 if ((error = zfs_get_parent(zc->zc_name, parentname, 822 sizeof (parentname))) != 0) 823 return (error); 824 825 if (zc->zc_value[0] != '\0') { 826 if ((error = zfs_secpolicy_write_perms(zc->zc_value, 827 ZFS_DELEG_PERM_CLONE, cr)) != 0) 828 return (error); 829 } 830 831 if ((error = zfs_secpolicy_write_perms(parentname, 832 ZFS_DELEG_PERM_CREATE, cr)) != 0) 833 return (error); 834 835 error = zfs_secpolicy_write_perms(parentname, 836 ZFS_DELEG_PERM_MOUNT, cr); 837 838 return (error); 839 } 840 841 static int 842 zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr) 843 { 844 int error; 845 846 error = secpolicy_fs_unmount(cr, NULL); 847 if (error) { 848 error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr); 849 } 850 return (error); 851 } 852 853 /* 854 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 855 * SYS_CONFIG privilege, which is not available in a local zone. 856 */ 857 /* ARGSUSED */ 858 static int 859 zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr) 860 { 861 if (secpolicy_sys_config(cr, B_FALSE) != 0) 862 return (EPERM); 863 864 return (0); 865 } 866 867 /* 868 * Policy for object to name lookups. 869 */ 870 /* ARGSUSED */ 871 static int 872 zfs_secpolicy_diff(zfs_cmd_t *zc, cred_t *cr) 873 { 874 int error; 875 876 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0) 877 return (0); 878 879 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr); 880 return (error); 881 } 882 883 /* 884 * Policy for fault injection. Requires all privileges. 885 */ 886 /* ARGSUSED */ 887 static int 888 zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr) 889 { 890 return (secpolicy_zinject(cr)); 891 } 892 893 static int 894 zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr) 895 { 896 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 897 898 if (prop == ZPROP_INVAL) { 899 if (!zfs_prop_user(zc->zc_value)) 900 return (EINVAL); 901 return (zfs_secpolicy_write_perms(zc->zc_name, 902 ZFS_DELEG_PERM_USERPROP, cr)); 903 } else { 904 return (zfs_secpolicy_setprop(zc->zc_name, prop, 905 NULL, cr)); 906 } 907 } 908 909 static int 910 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, cred_t *cr) 911 { 912 int err = zfs_secpolicy_read(zc, cr); 913 if (err) 914 return (err); 915 916 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 917 return (EINVAL); 918 919 if (zc->zc_value[0] == 0) { 920 /* 921 * They are asking about a posix uid/gid. If it's 922 * themself, allow it. 923 */ 924 if (zc->zc_objset_type == ZFS_PROP_USERUSED || 925 zc->zc_objset_type == ZFS_PROP_USERQUOTA) { 926 if (zc->zc_guid == crgetuid(cr)) 927 return (0); 928 } else { 929 if (groupmember(zc->zc_guid, cr)) 930 return (0); 931 } 932 } 933 934 return (zfs_secpolicy_write_perms(zc->zc_name, 935 userquota_perms[zc->zc_objset_type], cr)); 936 } 937 938 static int 939 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, cred_t *cr) 940 { 941 int err = zfs_secpolicy_read(zc, cr); 942 if (err) 943 return (err); 944 945 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 946 return (EINVAL); 947 948 return (zfs_secpolicy_write_perms(zc->zc_name, 949 userquota_perms[zc->zc_objset_type], cr)); 950 } 951 952 static int 953 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, cred_t *cr) 954 { 955 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, 956 NULL, cr)); 957 } 958 959 static int 960 zfs_secpolicy_hold(zfs_cmd_t *zc, cred_t *cr) 961 { 962 return (zfs_secpolicy_write_perms(zc->zc_name, 963 ZFS_DELEG_PERM_HOLD, cr)); 964 } 965 966 static int 967 zfs_secpolicy_release(zfs_cmd_t *zc, cred_t *cr) 968 { 969 return (zfs_secpolicy_write_perms(zc->zc_name, 970 ZFS_DELEG_PERM_RELEASE, cr)); 971 } 972 973 /* 974 * Policy for allowing temporary snapshots to be taken or released 975 */ 976 static int 977 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, cred_t *cr) 978 { 979 /* 980 * A temporary snapshot is the same as a snapshot, 981 * hold, destroy and release all rolled into one. 982 * Delegated diff alone is sufficient that we allow this. 983 */ 984 int error; 985 986 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 987 ZFS_DELEG_PERM_DIFF, cr)) == 0) 988 return (0); 989 990 error = zfs_secpolicy_snapshot(zc, cr); 991 if (!error) 992 error = zfs_secpolicy_hold(zc, cr); 993 if (!error) 994 error = zfs_secpolicy_release(zc, cr); 995 if (!error) 996 error = zfs_secpolicy_destroy(zc, cr); 997 return (error); 998 } 999 1000 /* 1001 * Returns the nvlist as specified by the user in the zfs_cmd_t. 1002 */ 1003 static int 1004 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) 1005 { 1006 char *packed; 1007 int error; 1008 nvlist_t *list = NULL; 1009 1010 /* 1011 * Read in and unpack the user-supplied nvlist. 1012 */ 1013 if (size == 0) 1014 return (EINVAL); 1015 1016 packed = kmem_alloc(size, KM_SLEEP); 1017 1018 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, 1019 iflag)) != 0) { 1020 kmem_free(packed, size); 1021 return (error); 1022 } 1023 1024 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 1025 kmem_free(packed, size); 1026 return (error); 1027 } 1028 1029 kmem_free(packed, size); 1030 1031 *nvp = list; 1032 return (0); 1033 } 1034 1035 static int 1036 fit_error_list(zfs_cmd_t *zc, nvlist_t **errors) 1037 { 1038 size_t size; 1039 1040 VERIFY(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0); 1041 1042 if (size > zc->zc_nvlist_dst_size) { 1043 nvpair_t *more_errors; 1044 int n = 0; 1045 1046 if (zc->zc_nvlist_dst_size < 1024) 1047 return (ENOMEM); 1048 1049 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, 0) == 0); 1050 more_errors = nvlist_prev_nvpair(*errors, NULL); 1051 1052 do { 1053 nvpair_t *pair = nvlist_prev_nvpair(*errors, 1054 more_errors); 1055 VERIFY(nvlist_remove_nvpair(*errors, pair) == 0); 1056 n++; 1057 VERIFY(nvlist_size(*errors, &size, 1058 NV_ENCODE_NATIVE) == 0); 1059 } while (size > zc->zc_nvlist_dst_size); 1060 1061 VERIFY(nvlist_remove_nvpair(*errors, more_errors) == 0); 1062 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, n) == 0); 1063 ASSERT(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0); 1064 ASSERT(size <= zc->zc_nvlist_dst_size); 1065 } 1066 1067 return (0); 1068 } 1069 1070 static int 1071 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 1072 { 1073 char *packed = NULL; 1074 int error = 0; 1075 size_t size; 1076 1077 VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0); 1078 1079 if (size > zc->zc_nvlist_dst_size) { 1080 error = ENOMEM; 1081 } else { 1082 packed = kmem_alloc(size, KM_SLEEP); 1083 VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE, 1084 KM_SLEEP) == 0); 1085 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 1086 size, zc->zc_iflags) != 0) 1087 error = EFAULT; 1088 kmem_free(packed, size); 1089 } 1090 1091 zc->zc_nvlist_dst_size = size; 1092 return (error); 1093 } 1094 1095 static int 1096 getzfsvfs(const char *dsname, zfsvfs_t **zfvp) 1097 { 1098 objset_t *os; 1099 int error; 1100 1101 error = dmu_objset_hold(dsname, FTAG, &os); 1102 if (error) 1103 return (error); 1104 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1105 dmu_objset_rele(os, FTAG); 1106 return (EINVAL); 1107 } 1108 1109 mutex_enter(&os->os_user_ptr_lock); 1110 *zfvp = dmu_objset_get_user(os); 1111 if (*zfvp) { 1112 VFS_HOLD((*zfvp)->z_vfs); 1113 } else { 1114 error = ESRCH; 1115 } 1116 mutex_exit(&os->os_user_ptr_lock); 1117 dmu_objset_rele(os, FTAG); 1118 return (error); 1119 } 1120 1121 /* 1122 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which 1123 * case its z_vfs will be NULL, and it will be opened as the owner. 1124 */ 1125 static int 1126 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer) 1127 { 1128 int error = 0; 1129 1130 if (getzfsvfs(name, zfvp) != 0) 1131 error = zfsvfs_create(name, zfvp); 1132 if (error == 0) { 1133 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER : 1134 RW_READER, tag); 1135 if ((*zfvp)->z_unmounted) { 1136 /* 1137 * XXX we could probably try again, since the unmounting 1138 * thread should be just about to disassociate the 1139 * objset from the zfsvfs. 1140 */ 1141 rrw_exit(&(*zfvp)->z_teardown_lock, tag); 1142 return (EBUSY); 1143 } 1144 } 1145 return (error); 1146 } 1147 1148 static void 1149 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) 1150 { 1151 rrw_exit(&zfsvfs->z_teardown_lock, tag); 1152 1153 if (zfsvfs->z_vfs) { 1154 VFS_RELE(zfsvfs->z_vfs); 1155 } else { 1156 dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1157 zfsvfs_free(zfsvfs); 1158 } 1159 } 1160 1161 static int 1162 zfs_ioc_pool_create(zfs_cmd_t *zc) 1163 { 1164 int error; 1165 nvlist_t *config, *props = NULL; 1166 nvlist_t *rootprops = NULL; 1167 nvlist_t *zplprops = NULL; 1168 char *buf; 1169 1170 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1171 zc->zc_iflags, &config)) 1172 return (error); 1173 1174 if (zc->zc_nvlist_src_size != 0 && (error = 1175 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1176 zc->zc_iflags, &props))) { 1177 nvlist_free(config); 1178 return (error); 1179 } 1180 1181 if (props) { 1182 nvlist_t *nvl = NULL; 1183 uint64_t version = SPA_VERSION; 1184 1185 (void) nvlist_lookup_uint64(props, 1186 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); 1187 if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) { 1188 error = EINVAL; 1189 goto pool_props_bad; 1190 } 1191 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); 1192 if (nvl) { 1193 error = nvlist_dup(nvl, &rootprops, KM_SLEEP); 1194 if (error != 0) { 1195 nvlist_free(config); 1196 nvlist_free(props); 1197 return (error); 1198 } 1199 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); 1200 } 1201 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1202 error = zfs_fill_zplprops_root(version, rootprops, 1203 zplprops, NULL); 1204 if (error) 1205 goto pool_props_bad; 1206 } 1207 1208 buf = history_str_get(zc); 1209 1210 error = spa_create(zc->zc_name, config, props, buf, zplprops); 1211 1212 /* 1213 * Set the remaining root properties 1214 */ 1215 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, 1216 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) 1217 (void) spa_destroy(zc->zc_name); 1218 1219 if (buf != NULL) 1220 history_str_free(buf); 1221 1222 pool_props_bad: 1223 nvlist_free(rootprops); 1224 nvlist_free(zplprops); 1225 nvlist_free(config); 1226 nvlist_free(props); 1227 1228 return (error); 1229 } 1230 1231 static int 1232 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 1233 { 1234 int error; 1235 zfs_log_history(zc); 1236 error = spa_destroy(zc->zc_name); 1237 if (error == 0) 1238 zvol_remove_minors(zc->zc_name); 1239 return (error); 1240 } 1241 1242 static int 1243 zfs_ioc_pool_import(zfs_cmd_t *zc) 1244 { 1245 nvlist_t *config, *props = NULL; 1246 uint64_t guid; 1247 int error; 1248 1249 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1250 zc->zc_iflags, &config)) != 0) 1251 return (error); 1252 1253 if (zc->zc_nvlist_src_size != 0 && (error = 1254 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1255 zc->zc_iflags, &props))) { 1256 nvlist_free(config); 1257 return (error); 1258 } 1259 1260 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1261 guid != zc->zc_guid) 1262 error = EINVAL; 1263 else 1264 error = spa_import(zc->zc_name, config, props, zc->zc_cookie); 1265 1266 if (zc->zc_nvlist_dst != 0) { 1267 int err; 1268 1269 if ((err = put_nvlist(zc, config)) != 0) 1270 error = err; 1271 } 1272 1273 nvlist_free(config); 1274 1275 if (props) 1276 nvlist_free(props); 1277 1278 return (error); 1279 } 1280 1281 static int 1282 zfs_ioc_pool_export(zfs_cmd_t *zc) 1283 { 1284 int error; 1285 boolean_t force = (boolean_t)zc->zc_cookie; 1286 boolean_t hardforce = (boolean_t)zc->zc_guid; 1287 1288 zfs_log_history(zc); 1289 error = spa_export(zc->zc_name, NULL, force, hardforce); 1290 if (error == 0) 1291 zvol_remove_minors(zc->zc_name); 1292 return (error); 1293 } 1294 1295 static int 1296 zfs_ioc_pool_configs(zfs_cmd_t *zc) 1297 { 1298 nvlist_t *configs; 1299 int error; 1300 1301 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 1302 return (EEXIST); 1303 1304 error = put_nvlist(zc, configs); 1305 1306 nvlist_free(configs); 1307 1308 return (error); 1309 } 1310 1311 static int 1312 zfs_ioc_pool_stats(zfs_cmd_t *zc) 1313 { 1314 nvlist_t *config; 1315 int error; 1316 int ret = 0; 1317 1318 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 1319 sizeof (zc->zc_value)); 1320 1321 if (config != NULL) { 1322 ret = put_nvlist(zc, config); 1323 nvlist_free(config); 1324 1325 /* 1326 * The config may be present even if 'error' is non-zero. 1327 * In this case we return success, and preserve the real errno 1328 * in 'zc_cookie'. 1329 */ 1330 zc->zc_cookie = error; 1331 } else { 1332 ret = error; 1333 } 1334 1335 return (ret); 1336 } 1337 1338 /* 1339 * Try to import the given pool, returning pool stats as appropriate so that 1340 * user land knows which devices are available and overall pool health. 1341 */ 1342 static int 1343 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 1344 { 1345 nvlist_t *tryconfig, *config; 1346 int error; 1347 1348 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1349 zc->zc_iflags, &tryconfig)) != 0) 1350 return (error); 1351 1352 config = spa_tryimport(tryconfig); 1353 1354 nvlist_free(tryconfig); 1355 1356 if (config == NULL) 1357 return (EINVAL); 1358 1359 error = put_nvlist(zc, config); 1360 nvlist_free(config); 1361 1362 return (error); 1363 } 1364 1365 /* 1366 * inputs: 1367 * zc_name name of the pool 1368 * zc_cookie scan func (pool_scan_func_t) 1369 */ 1370 static int 1371 zfs_ioc_pool_scan(zfs_cmd_t *zc) 1372 { 1373 spa_t *spa; 1374 int error; 1375 1376 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1377 return (error); 1378 1379 if (zc->zc_cookie == POOL_SCAN_NONE) 1380 error = spa_scan_stop(spa); 1381 else 1382 error = spa_scan(spa, zc->zc_cookie); 1383 1384 spa_close(spa, FTAG); 1385 1386 return (error); 1387 } 1388 1389 static int 1390 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 1391 { 1392 spa_t *spa; 1393 int error; 1394 1395 error = spa_open(zc->zc_name, &spa, FTAG); 1396 if (error == 0) { 1397 spa_freeze(spa); 1398 spa_close(spa, FTAG); 1399 } 1400 return (error); 1401 } 1402 1403 static int 1404 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 1405 { 1406 spa_t *spa; 1407 int error; 1408 1409 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1410 return (error); 1411 1412 if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) { 1413 spa_close(spa, FTAG); 1414 return (EINVAL); 1415 } 1416 1417 spa_upgrade(spa, zc->zc_cookie); 1418 spa_close(spa, FTAG); 1419 1420 return (error); 1421 } 1422 1423 static int 1424 zfs_ioc_pool_get_history(zfs_cmd_t *zc) 1425 { 1426 spa_t *spa; 1427 char *hist_buf; 1428 uint64_t size; 1429 int error; 1430 1431 if ((size = zc->zc_history_len) == 0) 1432 return (EINVAL); 1433 1434 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1435 return (error); 1436 1437 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 1438 spa_close(spa, FTAG); 1439 return (ENOTSUP); 1440 } 1441 1442 hist_buf = kmem_alloc(size, KM_SLEEP); 1443 if ((error = spa_history_get(spa, &zc->zc_history_offset, 1444 &zc->zc_history_len, hist_buf)) == 0) { 1445 error = ddi_copyout(hist_buf, 1446 (void *)(uintptr_t)zc->zc_history, 1447 zc->zc_history_len, zc->zc_iflags); 1448 } 1449 1450 spa_close(spa, FTAG); 1451 kmem_free(hist_buf, size); 1452 return (error); 1453 } 1454 1455 static int 1456 zfs_ioc_pool_reguid(zfs_cmd_t *zc) 1457 { 1458 spa_t *spa; 1459 int error; 1460 1461 error = spa_open(zc->zc_name, &spa, FTAG); 1462 if (error == 0) { 1463 error = spa_change_guid(spa); 1464 spa_close(spa, FTAG); 1465 } 1466 return (error); 1467 } 1468 1469 static int 1470 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 1471 { 1472 int error; 1473 1474 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)) 1475 return (error); 1476 1477 return (0); 1478 } 1479 1480 /* 1481 * inputs: 1482 * zc_name name of filesystem 1483 * zc_obj object to find 1484 * 1485 * outputs: 1486 * zc_value name of object 1487 */ 1488 static int 1489 zfs_ioc_obj_to_path(zfs_cmd_t *zc) 1490 { 1491 objset_t *os; 1492 int error; 1493 1494 /* XXX reading from objset not owned */ 1495 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1496 return (error); 1497 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1498 dmu_objset_rele(os, FTAG); 1499 return (EINVAL); 1500 } 1501 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, 1502 sizeof (zc->zc_value)); 1503 dmu_objset_rele(os, FTAG); 1504 1505 return (error); 1506 } 1507 1508 /* 1509 * inputs: 1510 * zc_name name of filesystem 1511 * zc_obj object to find 1512 * 1513 * outputs: 1514 * zc_stat stats on object 1515 * zc_value path to object 1516 */ 1517 static int 1518 zfs_ioc_obj_to_stats(zfs_cmd_t *zc) 1519 { 1520 objset_t *os; 1521 int error; 1522 1523 /* XXX reading from objset not owned */ 1524 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1525 return (error); 1526 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1527 dmu_objset_rele(os, FTAG); 1528 return (EINVAL); 1529 } 1530 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value, 1531 sizeof (zc->zc_value)); 1532 dmu_objset_rele(os, FTAG); 1533 1534 return (error); 1535 } 1536 1537 static int 1538 zfs_ioc_vdev_add(zfs_cmd_t *zc) 1539 { 1540 spa_t *spa; 1541 int error; 1542 nvlist_t *config, **l2cache, **spares; 1543 uint_t nl2cache = 0, nspares = 0; 1544 1545 error = spa_open(zc->zc_name, &spa, FTAG); 1546 if (error != 0) 1547 return (error); 1548 1549 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1550 zc->zc_iflags, &config); 1551 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, 1552 &l2cache, &nl2cache); 1553 1554 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, 1555 &spares, &nspares); 1556 1557 /* 1558 * A root pool with concatenated devices is not supported. 1559 * Thus, can not add a device to a root pool. 1560 * 1561 * Intent log device can not be added to a rootpool because 1562 * during mountroot, zil is replayed, a seperated log device 1563 * can not be accessed during the mountroot time. 1564 * 1565 * l2cache and spare devices are ok to be added to a rootpool. 1566 */ 1567 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { 1568 nvlist_free(config); 1569 spa_close(spa, FTAG); 1570 return (EDOM); 1571 } 1572 1573 if (error == 0) { 1574 error = spa_vdev_add(spa, config); 1575 nvlist_free(config); 1576 } 1577 spa_close(spa, FTAG); 1578 return (error); 1579 } 1580 1581 /* 1582 * inputs: 1583 * zc_name name of the pool 1584 * zc_nvlist_conf nvlist of devices to remove 1585 * zc_cookie to stop the remove? 1586 */ 1587 static int 1588 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 1589 { 1590 spa_t *spa; 1591 int error; 1592 1593 error = spa_open(zc->zc_name, &spa, FTAG); 1594 if (error != 0) 1595 return (error); 1596 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 1597 spa_close(spa, FTAG); 1598 return (error); 1599 } 1600 1601 static int 1602 zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 1603 { 1604 spa_t *spa; 1605 int error; 1606 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 1607 1608 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1609 return (error); 1610 switch (zc->zc_cookie) { 1611 case VDEV_STATE_ONLINE: 1612 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 1613 break; 1614 1615 case VDEV_STATE_OFFLINE: 1616 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 1617 break; 1618 1619 case VDEV_STATE_FAULTED: 1620 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1621 zc->zc_obj != VDEV_AUX_EXTERNAL) 1622 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1623 1624 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); 1625 break; 1626 1627 case VDEV_STATE_DEGRADED: 1628 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1629 zc->zc_obj != VDEV_AUX_EXTERNAL) 1630 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1631 1632 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj); 1633 break; 1634 1635 default: 1636 error = EINVAL; 1637 } 1638 zc->zc_cookie = newstate; 1639 spa_close(spa, FTAG); 1640 return (error); 1641 } 1642 1643 static int 1644 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1645 { 1646 spa_t *spa; 1647 int replacing = zc->zc_cookie; 1648 nvlist_t *config; 1649 int error; 1650 1651 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1652 return (error); 1653 1654 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1655 zc->zc_iflags, &config)) == 0) { 1656 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 1657 nvlist_free(config); 1658 } 1659 1660 spa_close(spa, FTAG); 1661 return (error); 1662 } 1663 1664 static int 1665 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 1666 { 1667 spa_t *spa; 1668 int error; 1669 1670 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1671 return (error); 1672 1673 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); 1674 1675 spa_close(spa, FTAG); 1676 return (error); 1677 } 1678 1679 static int 1680 zfs_ioc_vdev_split(zfs_cmd_t *zc) 1681 { 1682 spa_t *spa; 1683 nvlist_t *config, *props = NULL; 1684 int error; 1685 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT); 1686 1687 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1688 return (error); 1689 1690 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1691 zc->zc_iflags, &config)) { 1692 spa_close(spa, FTAG); 1693 return (error); 1694 } 1695 1696 if (zc->zc_nvlist_src_size != 0 && (error = 1697 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1698 zc->zc_iflags, &props))) { 1699 spa_close(spa, FTAG); 1700 nvlist_free(config); 1701 return (error); 1702 } 1703 1704 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp); 1705 1706 spa_close(spa, FTAG); 1707 1708 nvlist_free(config); 1709 nvlist_free(props); 1710 1711 return (error); 1712 } 1713 1714 static int 1715 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 1716 { 1717 spa_t *spa; 1718 char *path = zc->zc_value; 1719 uint64_t guid = zc->zc_guid; 1720 int error; 1721 1722 error = spa_open(zc->zc_name, &spa, FTAG); 1723 if (error != 0) 1724 return (error); 1725 1726 error = spa_vdev_setpath(spa, guid, path); 1727 spa_close(spa, FTAG); 1728 return (error); 1729 } 1730 1731 static int 1732 zfs_ioc_vdev_setfru(zfs_cmd_t *zc) 1733 { 1734 spa_t *spa; 1735 char *fru = zc->zc_value; 1736 uint64_t guid = zc->zc_guid; 1737 int error; 1738 1739 error = spa_open(zc->zc_name, &spa, FTAG); 1740 if (error != 0) 1741 return (error); 1742 1743 error = spa_vdev_setfru(spa, guid, fru); 1744 spa_close(spa, FTAG); 1745 return (error); 1746 } 1747 1748 static int 1749 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os) 1750 { 1751 int error = 0; 1752 nvlist_t *nv; 1753 1754 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1755 1756 if (zc->zc_nvlist_dst != 0 && 1757 (error = dsl_prop_get_all(os, &nv)) == 0) { 1758 dmu_objset_stats(os, nv); 1759 /* 1760 * NB: zvol_get_stats() will read the objset contents, 1761 * which we aren't supposed to do with a 1762 * DS_MODE_USER hold, because it could be 1763 * inconsistent. So this is a bit of a workaround... 1764 * XXX reading with out owning 1765 */ 1766 if (!zc->zc_objset_stats.dds_inconsistent) { 1767 if (dmu_objset_type(os) == DMU_OST_ZVOL) 1768 VERIFY(zvol_get_stats(os, nv) == 0); 1769 } 1770 error = put_nvlist(zc, nv); 1771 nvlist_free(nv); 1772 } 1773 1774 return (error); 1775 } 1776 1777 /* 1778 * inputs: 1779 * zc_name name of filesystem 1780 * zc_nvlist_dst_size size of buffer for property nvlist 1781 * 1782 * outputs: 1783 * zc_objset_stats stats 1784 * zc_nvlist_dst property nvlist 1785 * zc_nvlist_dst_size size of property nvlist 1786 */ 1787 static int 1788 zfs_ioc_objset_stats(zfs_cmd_t *zc) 1789 { 1790 objset_t *os = NULL; 1791 int error; 1792 1793 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1794 return (error); 1795 1796 error = zfs_ioc_objset_stats_impl(zc, os); 1797 1798 dmu_objset_rele(os, FTAG); 1799 1800 return (error); 1801 } 1802 1803 /* 1804 * inputs: 1805 * zc_name name of filesystem 1806 * zc_nvlist_dst_size size of buffer for property nvlist 1807 * 1808 * outputs: 1809 * zc_nvlist_dst received property nvlist 1810 * zc_nvlist_dst_size size of received property nvlist 1811 * 1812 * Gets received properties (distinct from local properties on or after 1813 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from 1814 * local property values. 1815 */ 1816 static int 1817 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) 1818 { 1819 objset_t *os = NULL; 1820 int error; 1821 nvlist_t *nv; 1822 1823 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1824 return (error); 1825 1826 /* 1827 * Without this check, we would return local property values if the 1828 * caller has not already received properties on or after 1829 * SPA_VERSION_RECVD_PROPS. 1830 */ 1831 if (!dsl_prop_get_hasrecvd(os)) { 1832 dmu_objset_rele(os, FTAG); 1833 return (ENOTSUP); 1834 } 1835 1836 if (zc->zc_nvlist_dst != 0 && 1837 (error = dsl_prop_get_received(os, &nv)) == 0) { 1838 error = put_nvlist(zc, nv); 1839 nvlist_free(nv); 1840 } 1841 1842 dmu_objset_rele(os, FTAG); 1843 return (error); 1844 } 1845 1846 static int 1847 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) 1848 { 1849 uint64_t value; 1850 int error; 1851 1852 /* 1853 * zfs_get_zplprop() will either find a value or give us 1854 * the default value (if there is one). 1855 */ 1856 if ((error = zfs_get_zplprop(os, prop, &value)) != 0) 1857 return (error); 1858 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); 1859 return (0); 1860 } 1861 1862 /* 1863 * inputs: 1864 * zc_name name of filesystem 1865 * zc_nvlist_dst_size size of buffer for zpl property nvlist 1866 * 1867 * outputs: 1868 * zc_nvlist_dst zpl property nvlist 1869 * zc_nvlist_dst_size size of zpl property nvlist 1870 */ 1871 static int 1872 zfs_ioc_objset_zplprops(zfs_cmd_t *zc) 1873 { 1874 objset_t *os; 1875 int err; 1876 1877 /* XXX reading without owning */ 1878 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1879 return (err); 1880 1881 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1882 1883 /* 1884 * NB: nvl_add_zplprop() will read the objset contents, 1885 * which we aren't supposed to do with a DS_MODE_USER 1886 * hold, because it could be inconsistent. 1887 */ 1888 if (zc->zc_nvlist_dst != NULL && 1889 !zc->zc_objset_stats.dds_inconsistent && 1890 dmu_objset_type(os) == DMU_OST_ZFS) { 1891 nvlist_t *nv; 1892 1893 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1894 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && 1895 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && 1896 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && 1897 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) 1898 err = put_nvlist(zc, nv); 1899 nvlist_free(nv); 1900 } else { 1901 err = ENOENT; 1902 } 1903 dmu_objset_rele(os, FTAG); 1904 return (err); 1905 } 1906 1907 static boolean_t 1908 dataset_name_hidden(const char *name) 1909 { 1910 /* 1911 * Skip over datasets that are not visible in this zone, 1912 * internal datasets (which have a $ in their name), and 1913 * temporary datasets (which have a % in their name). 1914 */ 1915 if (strchr(name, '$') != NULL) 1916 return (B_TRUE); 1917 if (strchr(name, '%') != NULL) 1918 return (B_TRUE); 1919 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 1920 return (B_TRUE); 1921 return (B_FALSE); 1922 } 1923 1924 /* 1925 * inputs: 1926 * zc_name name of filesystem 1927 * zc_cookie zap cursor 1928 * zc_nvlist_dst_size size of buffer for property nvlist 1929 * 1930 * outputs: 1931 * zc_name name of next filesystem 1932 * zc_cookie zap cursor 1933 * zc_objset_stats stats 1934 * zc_nvlist_dst property nvlist 1935 * zc_nvlist_dst_size size of property nvlist 1936 */ 1937 static int 1938 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 1939 { 1940 objset_t *os; 1941 int error; 1942 char *p; 1943 size_t orig_len = strlen(zc->zc_name); 1944 1945 top: 1946 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { 1947 if (error == ENOENT) 1948 error = ESRCH; 1949 return (error); 1950 } 1951 1952 p = strrchr(zc->zc_name, '/'); 1953 if (p == NULL || p[1] != '\0') 1954 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 1955 p = zc->zc_name + strlen(zc->zc_name); 1956 1957 /* 1958 * Pre-fetch the datasets. dmu_objset_prefetch() always returns 0 1959 * but is not declared void because its called by dmu_objset_find(). 1960 */ 1961 if (zc->zc_cookie == 0) { 1962 uint64_t cookie = 0; 1963 int len = sizeof (zc->zc_name) - (p - zc->zc_name); 1964 1965 while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0) { 1966 if (!dataset_name_hidden(zc->zc_name)) 1967 (void) dmu_objset_prefetch(zc->zc_name, NULL); 1968 } 1969 } 1970 1971 do { 1972 error = dmu_dir_list_next(os, 1973 sizeof (zc->zc_name) - (p - zc->zc_name), p, 1974 NULL, &zc->zc_cookie); 1975 if (error == ENOENT) 1976 error = ESRCH; 1977 } while (error == 0 && dataset_name_hidden(zc->zc_name) && 1978 !(zc->zc_iflags & FKIOCTL)); 1979 dmu_objset_rele(os, FTAG); 1980 1981 /* 1982 * If it's an internal dataset (ie. with a '$' in its name), 1983 * don't try to get stats for it, otherwise we'll return ENOENT. 1984 */ 1985 if (error == 0 && strchr(zc->zc_name, '$') == NULL) { 1986 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 1987 if (error == ENOENT) { 1988 /* We lost a race with destroy, get the next one. */ 1989 zc->zc_name[orig_len] = '\0'; 1990 goto top; 1991 } 1992 } 1993 return (error); 1994 } 1995 1996 /* 1997 * inputs: 1998 * zc_name name of filesystem 1999 * zc_cookie zap cursor 2000 * zc_nvlist_dst_size size of buffer for property nvlist 2001 * 2002 * outputs: 2003 * zc_name name of next snapshot 2004 * zc_objset_stats stats 2005 * zc_nvlist_dst property nvlist 2006 * zc_nvlist_dst_size size of property nvlist 2007 */ 2008 static int 2009 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 2010 { 2011 objset_t *os; 2012 int error; 2013 2014 top: 2015 if (zc->zc_cookie == 0) 2016 (void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch, 2017 NULL, DS_FIND_SNAPSHOTS); 2018 2019 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2020 if (error) 2021 return (error == ENOENT ? ESRCH : error); 2022 2023 /* 2024 * A dataset name of maximum length cannot have any snapshots, 2025 * so exit immediately. 2026 */ 2027 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 2028 dmu_objset_rele(os, FTAG); 2029 return (ESRCH); 2030 } 2031 2032 error = dmu_snapshot_list_next(os, 2033 sizeof (zc->zc_name) - strlen(zc->zc_name), 2034 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie, 2035 NULL); 2036 2037 if (error == 0) { 2038 dsl_dataset_t *ds; 2039 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool; 2040 2041 /* 2042 * Since we probably don't have a hold on this snapshot, 2043 * it's possible that the objsetid could have been destroyed 2044 * and reused for a new objset. It's OK if this happens during 2045 * a zfs send operation, since the new createtxg will be 2046 * beyond the range we're interested in. 2047 */ 2048 rw_enter(&dp->dp_config_rwlock, RW_READER); 2049 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds); 2050 rw_exit(&dp->dp_config_rwlock); 2051 if (error) { 2052 if (error == ENOENT) { 2053 /* Racing with destroy, get the next one. */ 2054 *strchr(zc->zc_name, '@') = '\0'; 2055 dmu_objset_rele(os, FTAG); 2056 goto top; 2057 } 2058 } else { 2059 objset_t *ossnap; 2060 2061 error = dmu_objset_from_ds(ds, &ossnap); 2062 if (error == 0) 2063 error = zfs_ioc_objset_stats_impl(zc, ossnap); 2064 dsl_dataset_rele(ds, FTAG); 2065 } 2066 } else if (error == ENOENT) { 2067 error = ESRCH; 2068 } 2069 2070 dmu_objset_rele(os, FTAG); 2071 /* if we failed, undo the @ that we tacked on to zc_name */ 2072 if (error) 2073 *strchr(zc->zc_name, '@') = '\0'; 2074 return (error); 2075 } 2076 2077 static int 2078 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) 2079 { 2080 const char *propname = nvpair_name(pair); 2081 uint64_t *valary; 2082 unsigned int vallen; 2083 const char *domain; 2084 char *dash; 2085 zfs_userquota_prop_t type; 2086 uint64_t rid; 2087 uint64_t quota; 2088 zfsvfs_t *zfsvfs; 2089 int err; 2090 2091 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2092 nvlist_t *attrs; 2093 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2094 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2095 &pair) != 0) 2096 return (EINVAL); 2097 } 2098 2099 /* 2100 * A correctly constructed propname is encoded as 2101 * userquota@<rid>-<domain>. 2102 */ 2103 if ((dash = strchr(propname, '-')) == NULL || 2104 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 || 2105 vallen != 3) 2106 return (EINVAL); 2107 2108 domain = dash + 1; 2109 type = valary[0]; 2110 rid = valary[1]; 2111 quota = valary[2]; 2112 2113 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE); 2114 if (err == 0) { 2115 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); 2116 zfsvfs_rele(zfsvfs, FTAG); 2117 } 2118 2119 return (err); 2120 } 2121 2122 /* 2123 * If the named property is one that has a special function to set its value, 2124 * return 0 on success and a positive error code on failure; otherwise if it is 2125 * not one of the special properties handled by this function, return -1. 2126 * 2127 * XXX: It would be better for callers of the property interface if we handled 2128 * these special cases in dsl_prop.c (in the dsl layer). 2129 */ 2130 static int 2131 zfs_prop_set_special(const char *dsname, zprop_source_t source, 2132 nvpair_t *pair) 2133 { 2134 const char *propname = nvpair_name(pair); 2135 zfs_prop_t prop = zfs_name_to_prop(propname); 2136 uint64_t intval; 2137 int err; 2138 2139 if (prop == ZPROP_INVAL) { 2140 if (zfs_prop_userquota(propname)) 2141 return (zfs_prop_set_userquota(dsname, pair)); 2142 return (-1); 2143 } 2144 2145 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2146 nvlist_t *attrs; 2147 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2148 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2149 &pair) == 0); 2150 } 2151 2152 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) 2153 return (-1); 2154 2155 VERIFY(0 == nvpair_value_uint64(pair, &intval)); 2156 2157 switch (prop) { 2158 case ZFS_PROP_QUOTA: 2159 err = dsl_dir_set_quota(dsname, source, intval); 2160 break; 2161 case ZFS_PROP_REFQUOTA: 2162 err = dsl_dataset_set_quota(dsname, source, intval); 2163 break; 2164 case ZFS_PROP_RESERVATION: 2165 err = dsl_dir_set_reservation(dsname, source, intval); 2166 break; 2167 case ZFS_PROP_REFRESERVATION: 2168 err = dsl_dataset_set_reservation(dsname, source, intval); 2169 break; 2170 case ZFS_PROP_VOLSIZE: 2171 err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip), 2172 intval); 2173 break; 2174 case ZFS_PROP_VERSION: 2175 { 2176 zfsvfs_t *zfsvfs; 2177 2178 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0) 2179 break; 2180 2181 err = zfs_set_version(zfsvfs, intval); 2182 zfsvfs_rele(zfsvfs, FTAG); 2183 2184 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { 2185 zfs_cmd_t *zc; 2186 2187 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 2188 (void) strcpy(zc->zc_name, dsname); 2189 (void) zfs_ioc_userspace_upgrade(zc); 2190 kmem_free(zc, sizeof (zfs_cmd_t)); 2191 } 2192 break; 2193 } 2194 2195 default: 2196 err = -1; 2197 } 2198 2199 return (err); 2200 } 2201 2202 /* 2203 * This function is best effort. If it fails to set any of the given properties, 2204 * it continues to set as many as it can and returns the first error 2205 * encountered. If the caller provides a non-NULL errlist, it also gives the 2206 * complete list of names of all the properties it failed to set along with the 2207 * corresponding error numbers. The caller is responsible for freeing the 2208 * returned errlist. 2209 * 2210 * If every property is set successfully, zero is returned and the list pointed 2211 * at by errlist is NULL. 2212 */ 2213 int 2214 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, 2215 nvlist_t **errlist) 2216 { 2217 nvpair_t *pair; 2218 nvpair_t *propval; 2219 int rv = 0; 2220 uint64_t intval; 2221 char *strval; 2222 nvlist_t *genericnvl; 2223 nvlist_t *errors; 2224 nvlist_t *retrynvl; 2225 2226 VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2227 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2228 VERIFY(nvlist_alloc(&retrynvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2229 2230 retry: 2231 pair = NULL; 2232 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2233 const char *propname = nvpair_name(pair); 2234 zfs_prop_t prop = zfs_name_to_prop(propname); 2235 int err = 0; 2236 2237 /* decode the property value */ 2238 propval = pair; 2239 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2240 nvlist_t *attrs; 2241 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2242 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2243 &propval) != 0) 2244 err = EINVAL; 2245 } 2246 2247 /* Validate value type */ 2248 if (err == 0 && prop == ZPROP_INVAL) { 2249 if (zfs_prop_user(propname)) { 2250 if (nvpair_type(propval) != DATA_TYPE_STRING) 2251 err = EINVAL; 2252 } else if (zfs_prop_userquota(propname)) { 2253 if (nvpair_type(propval) != 2254 DATA_TYPE_UINT64_ARRAY) 2255 err = EINVAL; 2256 } 2257 } else if (err == 0) { 2258 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2259 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) 2260 err = EINVAL; 2261 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { 2262 const char *unused; 2263 2264 VERIFY(nvpair_value_uint64(propval, 2265 &intval) == 0); 2266 2267 switch (zfs_prop_get_type(prop)) { 2268 case PROP_TYPE_NUMBER: 2269 break; 2270 case PROP_TYPE_STRING: 2271 err = EINVAL; 2272 break; 2273 case PROP_TYPE_INDEX: 2274 if (zfs_prop_index_to_string(prop, 2275 intval, &unused) != 0) 2276 err = EINVAL; 2277 break; 2278 default: 2279 cmn_err(CE_PANIC, 2280 "unknown property type"); 2281 } 2282 } else { 2283 err = EINVAL; 2284 } 2285 } 2286 2287 /* Validate permissions */ 2288 if (err == 0) 2289 err = zfs_check_settable(dsname, pair, CRED()); 2290 2291 if (err == 0) { 2292 err = zfs_prop_set_special(dsname, source, pair); 2293 if (err == -1) { 2294 /* 2295 * For better performance we build up a list of 2296 * properties to set in a single transaction. 2297 */ 2298 err = nvlist_add_nvpair(genericnvl, pair); 2299 } else if (err != 0 && nvl != retrynvl) { 2300 /* 2301 * This may be a spurious error caused by 2302 * receiving quota and reservation out of order. 2303 * Try again in a second pass. 2304 */ 2305 err = nvlist_add_nvpair(retrynvl, pair); 2306 } 2307 } 2308 2309 if (err != 0) 2310 VERIFY(nvlist_add_int32(errors, propname, err) == 0); 2311 } 2312 2313 if (nvl != retrynvl && !nvlist_empty(retrynvl)) { 2314 nvl = retrynvl; 2315 goto retry; 2316 } 2317 2318 if (!nvlist_empty(genericnvl) && 2319 dsl_props_set(dsname, source, genericnvl) != 0) { 2320 /* 2321 * If this fails, we still want to set as many properties as we 2322 * can, so try setting them individually. 2323 */ 2324 pair = NULL; 2325 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { 2326 const char *propname = nvpair_name(pair); 2327 int err = 0; 2328 2329 propval = pair; 2330 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2331 nvlist_t *attrs; 2332 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2333 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2334 &propval) == 0); 2335 } 2336 2337 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2338 VERIFY(nvpair_value_string(propval, 2339 &strval) == 0); 2340 err = dsl_prop_set(dsname, propname, source, 1, 2341 strlen(strval) + 1, strval); 2342 } else { 2343 VERIFY(nvpair_value_uint64(propval, 2344 &intval) == 0); 2345 err = dsl_prop_set(dsname, propname, source, 8, 2346 1, &intval); 2347 } 2348 2349 if (err != 0) { 2350 VERIFY(nvlist_add_int32(errors, propname, 2351 err) == 0); 2352 } 2353 } 2354 } 2355 nvlist_free(genericnvl); 2356 nvlist_free(retrynvl); 2357 2358 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 2359 nvlist_free(errors); 2360 errors = NULL; 2361 } else { 2362 VERIFY(nvpair_value_int32(pair, &rv) == 0); 2363 } 2364 2365 if (errlist == NULL) 2366 nvlist_free(errors); 2367 else 2368 *errlist = errors; 2369 2370 return (rv); 2371 } 2372 2373 /* 2374 * Check that all the properties are valid user properties. 2375 */ 2376 static int 2377 zfs_check_userprops(char *fsname, nvlist_t *nvl) 2378 { 2379 nvpair_t *pair = NULL; 2380 int error = 0; 2381 2382 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2383 const char *propname = nvpair_name(pair); 2384 char *valstr; 2385 2386 if (!zfs_prop_user(propname) || 2387 nvpair_type(pair) != DATA_TYPE_STRING) 2388 return (EINVAL); 2389 2390 if (error = zfs_secpolicy_write_perms(fsname, 2391 ZFS_DELEG_PERM_USERPROP, CRED())) 2392 return (error); 2393 2394 if (strlen(propname) >= ZAP_MAXNAMELEN) 2395 return (ENAMETOOLONG); 2396 2397 VERIFY(nvpair_value_string(pair, &valstr) == 0); 2398 if (strlen(valstr) >= ZAP_MAXVALUELEN) 2399 return (E2BIG); 2400 } 2401 return (0); 2402 } 2403 2404 static void 2405 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) 2406 { 2407 nvpair_t *pair; 2408 2409 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2410 2411 pair = NULL; 2412 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { 2413 if (nvlist_exists(skipped, nvpair_name(pair))) 2414 continue; 2415 2416 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); 2417 } 2418 } 2419 2420 static int 2421 clear_received_props(objset_t *os, const char *fs, nvlist_t *props, 2422 nvlist_t *skipped) 2423 { 2424 int err = 0; 2425 nvlist_t *cleared_props = NULL; 2426 props_skip(props, skipped, &cleared_props); 2427 if (!nvlist_empty(cleared_props)) { 2428 /* 2429 * Acts on local properties until the dataset has received 2430 * properties at least once on or after SPA_VERSION_RECVD_PROPS. 2431 */ 2432 zprop_source_t flags = (ZPROP_SRC_NONE | 2433 (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0)); 2434 err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL); 2435 } 2436 nvlist_free(cleared_props); 2437 return (err); 2438 } 2439 2440 /* 2441 * inputs: 2442 * zc_name name of filesystem 2443 * zc_value name of property to set 2444 * zc_nvlist_src{_size} nvlist of properties to apply 2445 * zc_cookie received properties flag 2446 * 2447 * outputs: 2448 * zc_nvlist_dst{_size} error for each unapplied received property 2449 */ 2450 static int 2451 zfs_ioc_set_prop(zfs_cmd_t *zc) 2452 { 2453 nvlist_t *nvl; 2454 boolean_t received = zc->zc_cookie; 2455 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : 2456 ZPROP_SRC_LOCAL); 2457 nvlist_t *errors = NULL; 2458 int error; 2459 2460 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2461 zc->zc_iflags, &nvl)) != 0) 2462 return (error); 2463 2464 if (received) { 2465 nvlist_t *origprops; 2466 objset_t *os; 2467 2468 if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) { 2469 if (dsl_prop_get_received(os, &origprops) == 0) { 2470 (void) clear_received_props(os, 2471 zc->zc_name, origprops, nvl); 2472 nvlist_free(origprops); 2473 } 2474 2475 dsl_prop_set_hasrecvd(os); 2476 dmu_objset_rele(os, FTAG); 2477 } 2478 } 2479 2480 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors); 2481 2482 if (zc->zc_nvlist_dst != NULL && errors != NULL) { 2483 (void) put_nvlist(zc, errors); 2484 } 2485 2486 nvlist_free(errors); 2487 nvlist_free(nvl); 2488 return (error); 2489 } 2490 2491 /* 2492 * inputs: 2493 * zc_name name of filesystem 2494 * zc_value name of property to inherit 2495 * zc_cookie revert to received value if TRUE 2496 * 2497 * outputs: none 2498 */ 2499 static int 2500 zfs_ioc_inherit_prop(zfs_cmd_t *zc) 2501 { 2502 const char *propname = zc->zc_value; 2503 zfs_prop_t prop = zfs_name_to_prop(propname); 2504 boolean_t received = zc->zc_cookie; 2505 zprop_source_t source = (received 2506 ? ZPROP_SRC_NONE /* revert to received value, if any */ 2507 : ZPROP_SRC_INHERITED); /* explicitly inherit */ 2508 2509 if (received) { 2510 nvlist_t *dummy; 2511 nvpair_t *pair; 2512 zprop_type_t type; 2513 int err; 2514 2515 /* 2516 * zfs_prop_set_special() expects properties in the form of an 2517 * nvpair with type info. 2518 */ 2519 if (prop == ZPROP_INVAL) { 2520 if (!zfs_prop_user(propname)) 2521 return (EINVAL); 2522 2523 type = PROP_TYPE_STRING; 2524 } else if (prop == ZFS_PROP_VOLSIZE || 2525 prop == ZFS_PROP_VERSION) { 2526 return (EINVAL); 2527 } else { 2528 type = zfs_prop_get_type(prop); 2529 } 2530 2531 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2532 2533 switch (type) { 2534 case PROP_TYPE_STRING: 2535 VERIFY(0 == nvlist_add_string(dummy, propname, "")); 2536 break; 2537 case PROP_TYPE_NUMBER: 2538 case PROP_TYPE_INDEX: 2539 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); 2540 break; 2541 default: 2542 nvlist_free(dummy); 2543 return (EINVAL); 2544 } 2545 2546 pair = nvlist_next_nvpair(dummy, NULL); 2547 err = zfs_prop_set_special(zc->zc_name, source, pair); 2548 nvlist_free(dummy); 2549 if (err != -1) 2550 return (err); /* special property already handled */ 2551 } else { 2552 /* 2553 * Only check this in the non-received case. We want to allow 2554 * 'inherit -S' to revert non-inheritable properties like quota 2555 * and reservation to the received or default values even though 2556 * they are not considered inheritable. 2557 */ 2558 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) 2559 return (EINVAL); 2560 } 2561 2562 /* the property name has been validated by zfs_secpolicy_inherit() */ 2563 return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL)); 2564 } 2565 2566 static int 2567 zfs_ioc_pool_set_props(zfs_cmd_t *zc) 2568 { 2569 nvlist_t *props; 2570 spa_t *spa; 2571 int error; 2572 nvpair_t *pair; 2573 2574 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2575 zc->zc_iflags, &props)) 2576 return (error); 2577 2578 /* 2579 * If the only property is the configfile, then just do a spa_lookup() 2580 * to handle the faulted case. 2581 */ 2582 pair = nvlist_next_nvpair(props, NULL); 2583 if (pair != NULL && strcmp(nvpair_name(pair), 2584 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && 2585 nvlist_next_nvpair(props, pair) == NULL) { 2586 mutex_enter(&spa_namespace_lock); 2587 if ((spa = spa_lookup(zc->zc_name)) != NULL) { 2588 spa_configfile_set(spa, props, B_FALSE); 2589 spa_config_sync(spa, B_FALSE, B_TRUE); 2590 } 2591 mutex_exit(&spa_namespace_lock); 2592 if (spa != NULL) { 2593 nvlist_free(props); 2594 return (0); 2595 } 2596 } 2597 2598 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2599 nvlist_free(props); 2600 return (error); 2601 } 2602 2603 error = spa_prop_set(spa, props); 2604 2605 nvlist_free(props); 2606 spa_close(spa, FTAG); 2607 2608 return (error); 2609 } 2610 2611 static int 2612 zfs_ioc_pool_get_props(zfs_cmd_t *zc) 2613 { 2614 spa_t *spa; 2615 int error; 2616 nvlist_t *nvp = NULL; 2617 2618 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2619 /* 2620 * If the pool is faulted, there may be properties we can still 2621 * get (such as altroot and cachefile), so attempt to get them 2622 * anyway. 2623 */ 2624 mutex_enter(&spa_namespace_lock); 2625 if ((spa = spa_lookup(zc->zc_name)) != NULL) 2626 error = spa_prop_get(spa, &nvp); 2627 mutex_exit(&spa_namespace_lock); 2628 } else { 2629 error = spa_prop_get(spa, &nvp); 2630 spa_close(spa, FTAG); 2631 } 2632 2633 if (error == 0 && zc->zc_nvlist_dst != NULL) 2634 error = put_nvlist(zc, nvp); 2635 else 2636 error = EFAULT; 2637 2638 nvlist_free(nvp); 2639 return (error); 2640 } 2641 2642 /* 2643 * inputs: 2644 * zc_name name of filesystem 2645 * zc_nvlist_src{_size} nvlist of delegated permissions 2646 * zc_perm_action allow/unallow flag 2647 * 2648 * outputs: none 2649 */ 2650 static int 2651 zfs_ioc_set_fsacl(zfs_cmd_t *zc) 2652 { 2653 int error; 2654 nvlist_t *fsaclnv = NULL; 2655 2656 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2657 zc->zc_iflags, &fsaclnv)) != 0) 2658 return (error); 2659 2660 /* 2661 * Verify nvlist is constructed correctly 2662 */ 2663 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 2664 nvlist_free(fsaclnv); 2665 return (EINVAL); 2666 } 2667 2668 /* 2669 * If we don't have PRIV_SYS_MOUNT, then validate 2670 * that user is allowed to hand out each permission in 2671 * the nvlist(s) 2672 */ 2673 2674 error = secpolicy_zfs(CRED()); 2675 if (error) { 2676 if (zc->zc_perm_action == B_FALSE) { 2677 error = dsl_deleg_can_allow(zc->zc_name, 2678 fsaclnv, CRED()); 2679 } else { 2680 error = dsl_deleg_can_unallow(zc->zc_name, 2681 fsaclnv, CRED()); 2682 } 2683 } 2684 2685 if (error == 0) 2686 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 2687 2688 nvlist_free(fsaclnv); 2689 return (error); 2690 } 2691 2692 /* 2693 * inputs: 2694 * zc_name name of filesystem 2695 * 2696 * outputs: 2697 * zc_nvlist_src{_size} nvlist of delegated permissions 2698 */ 2699 static int 2700 zfs_ioc_get_fsacl(zfs_cmd_t *zc) 2701 { 2702 nvlist_t *nvp; 2703 int error; 2704 2705 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 2706 error = put_nvlist(zc, nvp); 2707 nvlist_free(nvp); 2708 } 2709 2710 return (error); 2711 } 2712 2713 /* 2714 * Search the vfs list for a specified resource. Returns a pointer to it 2715 * or NULL if no suitable entry is found. The caller of this routine 2716 * is responsible for releasing the returned vfs pointer. 2717 */ 2718 static vfs_t * 2719 zfs_get_vfs(const char *resource) 2720 { 2721 struct vfs *vfsp; 2722 struct vfs *vfs_found = NULL; 2723 2724 vfs_list_read_lock(); 2725 vfsp = rootvfs; 2726 do { 2727 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 2728 VFS_HOLD(vfsp); 2729 vfs_found = vfsp; 2730 break; 2731 } 2732 vfsp = vfsp->vfs_next; 2733 } while (vfsp != rootvfs); 2734 vfs_list_unlock(); 2735 return (vfs_found); 2736 } 2737 2738 /* ARGSUSED */ 2739 static void 2740 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 2741 { 2742 zfs_creat_t *zct = arg; 2743 2744 zfs_create_fs(os, cr, zct->zct_zplprops, tx); 2745 } 2746 2747 #define ZFS_PROP_UNDEFINED ((uint64_t)-1) 2748 2749 /* 2750 * inputs: 2751 * createprops list of properties requested by creator 2752 * default_zplver zpl version to use if unspecified in createprops 2753 * fuids_ok fuids allowed in this version of the spa? 2754 * os parent objset pointer (NULL if root fs) 2755 * 2756 * outputs: 2757 * zplprops values for the zplprops we attach to the master node object 2758 * is_ci true if requested file system will be purely case-insensitive 2759 * 2760 * Determine the settings for utf8only, normalization and 2761 * casesensitivity. Specific values may have been requested by the 2762 * creator and/or we can inherit values from the parent dataset. If 2763 * the file system is of too early a vintage, a creator can not 2764 * request settings for these properties, even if the requested 2765 * setting is the default value. We don't actually want to create dsl 2766 * properties for these, so remove them from the source nvlist after 2767 * processing. 2768 */ 2769 static int 2770 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, 2771 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops, 2772 nvlist_t *zplprops, boolean_t *is_ci) 2773 { 2774 uint64_t sense = ZFS_PROP_UNDEFINED; 2775 uint64_t norm = ZFS_PROP_UNDEFINED; 2776 uint64_t u8 = ZFS_PROP_UNDEFINED; 2777 2778 ASSERT(zplprops != NULL); 2779 2780 /* 2781 * Pull out creator prop choices, if any. 2782 */ 2783 if (createprops) { 2784 (void) nvlist_lookup_uint64(createprops, 2785 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); 2786 (void) nvlist_lookup_uint64(createprops, 2787 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); 2788 (void) nvlist_remove_all(createprops, 2789 zfs_prop_to_name(ZFS_PROP_NORMALIZE)); 2790 (void) nvlist_lookup_uint64(createprops, 2791 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); 2792 (void) nvlist_remove_all(createprops, 2793 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 2794 (void) nvlist_lookup_uint64(createprops, 2795 zfs_prop_to_name(ZFS_PROP_CASE), &sense); 2796 (void) nvlist_remove_all(createprops, 2797 zfs_prop_to_name(ZFS_PROP_CASE)); 2798 } 2799 2800 /* 2801 * If the zpl version requested is whacky or the file system 2802 * or pool is version is too "young" to support normalization 2803 * and the creator tried to set a value for one of the props, 2804 * error out. 2805 */ 2806 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || 2807 (zplver >= ZPL_VERSION_FUID && !fuids_ok) || 2808 (zplver >= ZPL_VERSION_SA && !sa_ok) || 2809 (zplver < ZPL_VERSION_NORMALIZATION && 2810 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || 2811 sense != ZFS_PROP_UNDEFINED))) 2812 return (ENOTSUP); 2813 2814 /* 2815 * Put the version in the zplprops 2816 */ 2817 VERIFY(nvlist_add_uint64(zplprops, 2818 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); 2819 2820 if (norm == ZFS_PROP_UNDEFINED) 2821 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); 2822 VERIFY(nvlist_add_uint64(zplprops, 2823 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); 2824 2825 /* 2826 * If we're normalizing, names must always be valid UTF-8 strings. 2827 */ 2828 if (norm) 2829 u8 = 1; 2830 if (u8 == ZFS_PROP_UNDEFINED) 2831 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); 2832 VERIFY(nvlist_add_uint64(zplprops, 2833 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); 2834 2835 if (sense == ZFS_PROP_UNDEFINED) 2836 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); 2837 VERIFY(nvlist_add_uint64(zplprops, 2838 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); 2839 2840 if (is_ci) 2841 *is_ci = (sense == ZFS_CASE_INSENSITIVE); 2842 2843 return (0); 2844 } 2845 2846 static int 2847 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, 2848 nvlist_t *zplprops, boolean_t *is_ci) 2849 { 2850 boolean_t fuids_ok, sa_ok; 2851 uint64_t zplver = ZPL_VERSION; 2852 objset_t *os = NULL; 2853 char parentname[MAXNAMELEN]; 2854 char *cp; 2855 spa_t *spa; 2856 uint64_t spa_vers; 2857 int error; 2858 2859 (void) strlcpy(parentname, dataset, sizeof (parentname)); 2860 cp = strrchr(parentname, '/'); 2861 ASSERT(cp != NULL); 2862 cp[0] = '\0'; 2863 2864 if ((error = spa_open(dataset, &spa, FTAG)) != 0) 2865 return (error); 2866 2867 spa_vers = spa_version(spa); 2868 spa_close(spa, FTAG); 2869 2870 zplver = zfs_zpl_version_map(spa_vers); 2871 fuids_ok = (zplver >= ZPL_VERSION_FUID); 2872 sa_ok = (zplver >= ZPL_VERSION_SA); 2873 2874 /* 2875 * Open parent object set so we can inherit zplprop values. 2876 */ 2877 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) 2878 return (error); 2879 2880 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops, 2881 zplprops, is_ci); 2882 dmu_objset_rele(os, FTAG); 2883 return (error); 2884 } 2885 2886 static int 2887 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, 2888 nvlist_t *zplprops, boolean_t *is_ci) 2889 { 2890 boolean_t fuids_ok; 2891 boolean_t sa_ok; 2892 uint64_t zplver = ZPL_VERSION; 2893 int error; 2894 2895 zplver = zfs_zpl_version_map(spa_vers); 2896 fuids_ok = (zplver >= ZPL_VERSION_FUID); 2897 sa_ok = (zplver >= ZPL_VERSION_SA); 2898 2899 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok, 2900 createprops, zplprops, is_ci); 2901 return (error); 2902 } 2903 2904 /* 2905 * inputs: 2906 * zc_objset_type type of objset to create (fs vs zvol) 2907 * zc_name name of new objset 2908 * zc_value name of snapshot to clone from (may be empty) 2909 * zc_nvlist_src{_size} nvlist of properties to apply 2910 * 2911 * outputs: none 2912 */ 2913 static int 2914 zfs_ioc_create(zfs_cmd_t *zc) 2915 { 2916 objset_t *clone; 2917 int error = 0; 2918 zfs_creat_t zct; 2919 nvlist_t *nvprops = NULL; 2920 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 2921 dmu_objset_type_t type = zc->zc_objset_type; 2922 2923 switch (type) { 2924 2925 case DMU_OST_ZFS: 2926 cbfunc = zfs_create_cb; 2927 break; 2928 2929 case DMU_OST_ZVOL: 2930 cbfunc = zvol_create_cb; 2931 break; 2932 2933 default: 2934 cbfunc = NULL; 2935 break; 2936 } 2937 if (strchr(zc->zc_name, '@') || 2938 strchr(zc->zc_name, '%')) 2939 return (EINVAL); 2940 2941 if (zc->zc_nvlist_src != NULL && 2942 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2943 zc->zc_iflags, &nvprops)) != 0) 2944 return (error); 2945 2946 zct.zct_zplprops = NULL; 2947 zct.zct_props = nvprops; 2948 2949 if (zc->zc_value[0] != '\0') { 2950 /* 2951 * We're creating a clone of an existing snapshot. 2952 */ 2953 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 2954 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) { 2955 nvlist_free(nvprops); 2956 return (EINVAL); 2957 } 2958 2959 error = dmu_objset_hold(zc->zc_value, FTAG, &clone); 2960 if (error) { 2961 nvlist_free(nvprops); 2962 return (error); 2963 } 2964 2965 error = dmu_objset_clone(zc->zc_name, dmu_objset_ds(clone), 0); 2966 dmu_objset_rele(clone, FTAG); 2967 if (error) { 2968 nvlist_free(nvprops); 2969 return (error); 2970 } 2971 } else { 2972 boolean_t is_insensitive = B_FALSE; 2973 2974 if (cbfunc == NULL) { 2975 nvlist_free(nvprops); 2976 return (EINVAL); 2977 } 2978 2979 if (type == DMU_OST_ZVOL) { 2980 uint64_t volsize, volblocksize; 2981 2982 if (nvprops == NULL || 2983 nvlist_lookup_uint64(nvprops, 2984 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 2985 &volsize) != 0) { 2986 nvlist_free(nvprops); 2987 return (EINVAL); 2988 } 2989 2990 if ((error = nvlist_lookup_uint64(nvprops, 2991 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 2992 &volblocksize)) != 0 && error != ENOENT) { 2993 nvlist_free(nvprops); 2994 return (EINVAL); 2995 } 2996 2997 if (error != 0) 2998 volblocksize = zfs_prop_default_numeric( 2999 ZFS_PROP_VOLBLOCKSIZE); 3000 3001 if ((error = zvol_check_volblocksize( 3002 volblocksize)) != 0 || 3003 (error = zvol_check_volsize(volsize, 3004 volblocksize)) != 0) { 3005 nvlist_free(nvprops); 3006 return (error); 3007 } 3008 } else if (type == DMU_OST_ZFS) { 3009 int error; 3010 3011 /* 3012 * We have to have normalization and 3013 * case-folding flags correct when we do the 3014 * file system creation, so go figure them out 3015 * now. 3016 */ 3017 VERIFY(nvlist_alloc(&zct.zct_zplprops, 3018 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3019 error = zfs_fill_zplprops(zc->zc_name, nvprops, 3020 zct.zct_zplprops, &is_insensitive); 3021 if (error != 0) { 3022 nvlist_free(nvprops); 3023 nvlist_free(zct.zct_zplprops); 3024 return (error); 3025 } 3026 } 3027 error = dmu_objset_create(zc->zc_name, type, 3028 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); 3029 nvlist_free(zct.zct_zplprops); 3030 } 3031 3032 /* 3033 * It would be nice to do this atomically. 3034 */ 3035 if (error == 0) { 3036 error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL, 3037 nvprops, NULL); 3038 if (error != 0) 3039 (void) dmu_objset_destroy(zc->zc_name, B_FALSE); 3040 } 3041 nvlist_free(nvprops); 3042 return (error); 3043 } 3044 3045 /* 3046 * inputs: 3047 * zc_name name of filesystem 3048 * zc_value short name of snapshot 3049 * zc_cookie recursive flag 3050 * zc_nvlist_src[_size] property list 3051 * 3052 * outputs: 3053 * zc_value short snapname (i.e. part after the '@') 3054 */ 3055 static int 3056 zfs_ioc_snapshot(zfs_cmd_t *zc) 3057 { 3058 nvlist_t *nvprops = NULL; 3059 int error; 3060 boolean_t recursive = zc->zc_cookie; 3061 3062 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 3063 return (EINVAL); 3064 3065 if (zc->zc_nvlist_src != NULL && 3066 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 3067 zc->zc_iflags, &nvprops)) != 0) 3068 return (error); 3069 3070 error = zfs_check_userprops(zc->zc_name, nvprops); 3071 if (error) 3072 goto out; 3073 3074 if (!nvlist_empty(nvprops) && 3075 zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) { 3076 error = ENOTSUP; 3077 goto out; 3078 } 3079 3080 error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, NULL, 3081 nvprops, recursive, B_FALSE, -1); 3082 3083 out: 3084 nvlist_free(nvprops); 3085 return (error); 3086 } 3087 3088 int 3089 zfs_unmount_snap(const char *name, void *arg) 3090 { 3091 vfs_t *vfsp = NULL; 3092 3093 if (arg) { 3094 char *snapname = arg; 3095 char *fullname = kmem_asprintf("%s@%s", name, snapname); 3096 vfsp = zfs_get_vfs(fullname); 3097 strfree(fullname); 3098 } else if (strchr(name, '@')) { 3099 vfsp = zfs_get_vfs(name); 3100 } 3101 3102 if (vfsp) { 3103 /* 3104 * Always force the unmount for snapshots. 3105 */ 3106 int flag = MS_FORCE; 3107 int err; 3108 3109 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) { 3110 VFS_RELE(vfsp); 3111 return (err); 3112 } 3113 VFS_RELE(vfsp); 3114 if ((err = dounmount(vfsp, flag, kcred)) != 0) 3115 return (err); 3116 } 3117 return (0); 3118 } 3119 3120 /* 3121 * inputs: 3122 * zc_name name of filesystem 3123 * zc_value short name of snapshot 3124 * zc_defer_destroy mark for deferred destroy 3125 * 3126 * outputs: none 3127 */ 3128 static int 3129 zfs_ioc_destroy_snaps(zfs_cmd_t *zc) 3130 { 3131 int err; 3132 3133 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 3134 return (EINVAL); 3135 err = dmu_objset_find(zc->zc_name, 3136 zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN); 3137 if (err) 3138 return (err); 3139 return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value, 3140 zc->zc_defer_destroy)); 3141 } 3142 3143 /* 3144 * inputs: 3145 * zc_name name of dataset to destroy 3146 * zc_objset_type type of objset 3147 * zc_defer_destroy mark for deferred destroy 3148 * 3149 * outputs: none 3150 */ 3151 static int 3152 zfs_ioc_destroy(zfs_cmd_t *zc) 3153 { 3154 int err; 3155 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) { 3156 err = zfs_unmount_snap(zc->zc_name, NULL); 3157 if (err) 3158 return (err); 3159 } 3160 3161 err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy); 3162 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 3163 (void) zvol_remove_minor(zc->zc_name); 3164 return (err); 3165 } 3166 3167 /* 3168 * inputs: 3169 * zc_name name of dataset to rollback (to most recent snapshot) 3170 * 3171 * outputs: none 3172 */ 3173 static int 3174 zfs_ioc_rollback(zfs_cmd_t *zc) 3175 { 3176 dsl_dataset_t *ds, *clone; 3177 int error; 3178 zfsvfs_t *zfsvfs; 3179 char *clone_name; 3180 3181 error = dsl_dataset_hold(zc->zc_name, FTAG, &ds); 3182 if (error) 3183 return (error); 3184 3185 /* must not be a snapshot */ 3186 if (dsl_dataset_is_snapshot(ds)) { 3187 dsl_dataset_rele(ds, FTAG); 3188 return (EINVAL); 3189 } 3190 3191 /* must have a most recent snapshot */ 3192 if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) { 3193 dsl_dataset_rele(ds, FTAG); 3194 return (EINVAL); 3195 } 3196 3197 /* 3198 * Create clone of most recent snapshot. 3199 */ 3200 clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name); 3201 error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT); 3202 if (error) 3203 goto out; 3204 3205 error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone); 3206 if (error) 3207 goto out; 3208 3209 /* 3210 * Do clone swap. 3211 */ 3212 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 3213 error = zfs_suspend_fs(zfsvfs); 3214 if (error == 0) { 3215 int resume_err; 3216 3217 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) { 3218 error = dsl_dataset_clone_swap(clone, ds, 3219 B_TRUE); 3220 dsl_dataset_disown(ds, FTAG); 3221 ds = NULL; 3222 } else { 3223 error = EBUSY; 3224 } 3225 resume_err = zfs_resume_fs(zfsvfs, zc->zc_name); 3226 error = error ? error : resume_err; 3227 } 3228 VFS_RELE(zfsvfs->z_vfs); 3229 } else { 3230 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) { 3231 error = dsl_dataset_clone_swap(clone, ds, B_TRUE); 3232 dsl_dataset_disown(ds, FTAG); 3233 ds = NULL; 3234 } else { 3235 error = EBUSY; 3236 } 3237 } 3238 3239 /* 3240 * Destroy clone (which also closes it). 3241 */ 3242 (void) dsl_dataset_destroy(clone, FTAG, B_FALSE); 3243 3244 out: 3245 strfree(clone_name); 3246 if (ds) 3247 dsl_dataset_rele(ds, FTAG); 3248 return (error); 3249 } 3250 3251 /* 3252 * inputs: 3253 * zc_name old name of dataset 3254 * zc_value new name of dataset 3255 * zc_cookie recursive flag (only valid for snapshots) 3256 * 3257 * outputs: none 3258 */ 3259 static int 3260 zfs_ioc_rename(zfs_cmd_t *zc) 3261 { 3262 boolean_t recursive = zc->zc_cookie & 1; 3263 3264 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3265 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3266 strchr(zc->zc_value, '%')) 3267 return (EINVAL); 3268 3269 /* 3270 * Unmount snapshot unless we're doing a recursive rename, 3271 * in which case the dataset code figures out which snapshots 3272 * to unmount. 3273 */ 3274 if (!recursive && strchr(zc->zc_name, '@') != NULL && 3275 zc->zc_objset_type == DMU_OST_ZFS) { 3276 int err = zfs_unmount_snap(zc->zc_name, NULL); 3277 if (err) 3278 return (err); 3279 } 3280 if (zc->zc_objset_type == DMU_OST_ZVOL) 3281 (void) zvol_remove_minor(zc->zc_name); 3282 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive)); 3283 } 3284 3285 static int 3286 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3287 { 3288 const char *propname = nvpair_name(pair); 3289 boolean_t issnap = (strchr(dsname, '@') != NULL); 3290 zfs_prop_t prop = zfs_name_to_prop(propname); 3291 uint64_t intval; 3292 int err; 3293 3294 if (prop == ZPROP_INVAL) { 3295 if (zfs_prop_user(propname)) { 3296 if (err = zfs_secpolicy_write_perms(dsname, 3297 ZFS_DELEG_PERM_USERPROP, cr)) 3298 return (err); 3299 return (0); 3300 } 3301 3302 if (!issnap && zfs_prop_userquota(propname)) { 3303 const char *perm = NULL; 3304 const char *uq_prefix = 3305 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3306 const char *gq_prefix = 3307 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3308 3309 if (strncmp(propname, uq_prefix, 3310 strlen(uq_prefix)) == 0) { 3311 perm = ZFS_DELEG_PERM_USERQUOTA; 3312 } else if (strncmp(propname, gq_prefix, 3313 strlen(gq_prefix)) == 0) { 3314 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3315 } else { 3316 /* USERUSED and GROUPUSED are read-only */ 3317 return (EINVAL); 3318 } 3319 3320 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3321 return (err); 3322 return (0); 3323 } 3324 3325 return (EINVAL); 3326 } 3327 3328 if (issnap) 3329 return (EINVAL); 3330 3331 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3332 /* 3333 * dsl_prop_get_all_impl() returns properties in this 3334 * format. 3335 */ 3336 nvlist_t *attrs; 3337 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3338 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3339 &pair) == 0); 3340 } 3341 3342 /* 3343 * Check that this value is valid for this pool version 3344 */ 3345 switch (prop) { 3346 case ZFS_PROP_COMPRESSION: 3347 /* 3348 * If the user specified gzip compression, make sure 3349 * the SPA supports it. We ignore any errors here since 3350 * we'll catch them later. 3351 */ 3352 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3353 nvpair_value_uint64(pair, &intval) == 0) { 3354 if (intval >= ZIO_COMPRESS_GZIP_1 && 3355 intval <= ZIO_COMPRESS_GZIP_9 && 3356 zfs_earlier_version(dsname, 3357 SPA_VERSION_GZIP_COMPRESSION)) { 3358 return (ENOTSUP); 3359 } 3360 3361 if (intval == ZIO_COMPRESS_ZLE && 3362 zfs_earlier_version(dsname, 3363 SPA_VERSION_ZLE_COMPRESSION)) 3364 return (ENOTSUP); 3365 3366 /* 3367 * If this is a bootable dataset then 3368 * verify that the compression algorithm 3369 * is supported for booting. We must return 3370 * something other than ENOTSUP since it 3371 * implies a downrev pool version. 3372 */ 3373 if (zfs_is_bootfs(dsname) && 3374 !BOOTFS_COMPRESS_VALID(intval)) { 3375 return (ERANGE); 3376 } 3377 } 3378 break; 3379 3380 case ZFS_PROP_COPIES: 3381 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3382 return (ENOTSUP); 3383 break; 3384 3385 case ZFS_PROP_DEDUP: 3386 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3387 return (ENOTSUP); 3388 break; 3389 3390 case ZFS_PROP_SHARESMB: 3391 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3392 return (ENOTSUP); 3393 break; 3394 3395 case ZFS_PROP_ACLINHERIT: 3396 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3397 nvpair_value_uint64(pair, &intval) == 0) { 3398 if (intval == ZFS_ACL_PASSTHROUGH_X && 3399 zfs_earlier_version(dsname, 3400 SPA_VERSION_PASSTHROUGH_X)) 3401 return (ENOTSUP); 3402 } 3403 break; 3404 } 3405 3406 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3407 } 3408 3409 /* 3410 * Removes properties from the given props list that fail permission checks 3411 * needed to clear them and to restore them in case of a receive error. For each 3412 * property, make sure we have both set and inherit permissions. 3413 * 3414 * Returns the first error encountered if any permission checks fail. If the 3415 * caller provides a non-NULL errlist, it also gives the complete list of names 3416 * of all the properties that failed a permission check along with the 3417 * corresponding error numbers. The caller is responsible for freeing the 3418 * returned errlist. 3419 * 3420 * If every property checks out successfully, zero is returned and the list 3421 * pointed at by errlist is NULL. 3422 */ 3423 static int 3424 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 3425 { 3426 zfs_cmd_t *zc; 3427 nvpair_t *pair, *next_pair; 3428 nvlist_t *errors; 3429 int err, rv = 0; 3430 3431 if (props == NULL) 3432 return (0); 3433 3434 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3435 3436 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 3437 (void) strcpy(zc->zc_name, dataset); 3438 pair = nvlist_next_nvpair(props, NULL); 3439 while (pair != NULL) { 3440 next_pair = nvlist_next_nvpair(props, pair); 3441 3442 (void) strcpy(zc->zc_value, nvpair_name(pair)); 3443 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 3444 (err = zfs_secpolicy_inherit(zc, CRED())) != 0) { 3445 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 3446 VERIFY(nvlist_add_int32(errors, 3447 zc->zc_value, err) == 0); 3448 } 3449 pair = next_pair; 3450 } 3451 kmem_free(zc, sizeof (zfs_cmd_t)); 3452 3453 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 3454 nvlist_free(errors); 3455 errors = NULL; 3456 } else { 3457 VERIFY(nvpair_value_int32(pair, &rv) == 0); 3458 } 3459 3460 if (errlist == NULL) 3461 nvlist_free(errors); 3462 else 3463 *errlist = errors; 3464 3465 return (rv); 3466 } 3467 3468 static boolean_t 3469 propval_equals(nvpair_t *p1, nvpair_t *p2) 3470 { 3471 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 3472 /* dsl_prop_get_all_impl() format */ 3473 nvlist_t *attrs; 3474 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 3475 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3476 &p1) == 0); 3477 } 3478 3479 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 3480 nvlist_t *attrs; 3481 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 3482 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3483 &p2) == 0); 3484 } 3485 3486 if (nvpair_type(p1) != nvpair_type(p2)) 3487 return (B_FALSE); 3488 3489 if (nvpair_type(p1) == DATA_TYPE_STRING) { 3490 char *valstr1, *valstr2; 3491 3492 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 3493 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 3494 return (strcmp(valstr1, valstr2) == 0); 3495 } else { 3496 uint64_t intval1, intval2; 3497 3498 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 3499 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 3500 return (intval1 == intval2); 3501 } 3502 } 3503 3504 /* 3505 * Remove properties from props if they are not going to change (as determined 3506 * by comparison with origprops). Remove them from origprops as well, since we 3507 * do not need to clear or restore properties that won't change. 3508 */ 3509 static void 3510 props_reduce(nvlist_t *props, nvlist_t *origprops) 3511 { 3512 nvpair_t *pair, *next_pair; 3513 3514 if (origprops == NULL) 3515 return; /* all props need to be received */ 3516 3517 pair = nvlist_next_nvpair(props, NULL); 3518 while (pair != NULL) { 3519 const char *propname = nvpair_name(pair); 3520 nvpair_t *match; 3521 3522 next_pair = nvlist_next_nvpair(props, pair); 3523 3524 if ((nvlist_lookup_nvpair(origprops, propname, 3525 &match) != 0) || !propval_equals(pair, match)) 3526 goto next; /* need to set received value */ 3527 3528 /* don't clear the existing received value */ 3529 (void) nvlist_remove_nvpair(origprops, match); 3530 /* don't bother receiving the property */ 3531 (void) nvlist_remove_nvpair(props, pair); 3532 next: 3533 pair = next_pair; 3534 } 3535 } 3536 3537 #ifdef DEBUG 3538 static boolean_t zfs_ioc_recv_inject_err; 3539 #endif 3540 3541 /* 3542 * inputs: 3543 * zc_name name of containing filesystem 3544 * zc_nvlist_src{_size} nvlist of properties to apply 3545 * zc_value name of snapshot to create 3546 * zc_string name of clone origin (if DRR_FLAG_CLONE) 3547 * zc_cookie file descriptor to recv from 3548 * zc_begin_record the BEGIN record of the stream (not byteswapped) 3549 * zc_guid force flag 3550 * zc_cleanup_fd cleanup-on-exit file descriptor 3551 * zc_action_handle handle for this guid/ds mapping (or zero on first call) 3552 * 3553 * outputs: 3554 * zc_cookie number of bytes read 3555 * zc_nvlist_dst{_size} error for each unapplied received property 3556 * zc_obj zprop_errflags_t 3557 * zc_action_handle handle for this guid/ds mapping 3558 */ 3559 static int 3560 zfs_ioc_recv(zfs_cmd_t *zc) 3561 { 3562 file_t *fp; 3563 objset_t *os; 3564 dmu_recv_cookie_t drc; 3565 boolean_t force = (boolean_t)zc->zc_guid; 3566 int fd; 3567 int error = 0; 3568 int props_error = 0; 3569 nvlist_t *errors; 3570 offset_t off; 3571 nvlist_t *props = NULL; /* sent properties */ 3572 nvlist_t *origprops = NULL; /* existing properties */ 3573 objset_t *origin = NULL; 3574 char *tosnap; 3575 char tofs[ZFS_MAXNAMELEN]; 3576 boolean_t first_recvd_props = B_FALSE; 3577 3578 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3579 strchr(zc->zc_value, '@') == NULL || 3580 strchr(zc->zc_value, '%')) 3581 return (EINVAL); 3582 3583 (void) strcpy(tofs, zc->zc_value); 3584 tosnap = strchr(tofs, '@'); 3585 *tosnap++ = '\0'; 3586 3587 if (zc->zc_nvlist_src != NULL && 3588 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 3589 zc->zc_iflags, &props)) != 0) 3590 return (error); 3591 3592 fd = zc->zc_cookie; 3593 fp = getf(fd); 3594 if (fp == NULL) { 3595 nvlist_free(props); 3596 return (EBADF); 3597 } 3598 3599 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3600 3601 if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) { 3602 if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) && 3603 !dsl_prop_get_hasrecvd(os)) { 3604 first_recvd_props = B_TRUE; 3605 } 3606 3607 /* 3608 * If new received properties are supplied, they are to 3609 * completely replace the existing received properties, so stash 3610 * away the existing ones. 3611 */ 3612 if (dsl_prop_get_received(os, &origprops) == 0) { 3613 nvlist_t *errlist = NULL; 3614 /* 3615 * Don't bother writing a property if its value won't 3616 * change (and avoid the unnecessary security checks). 3617 * 3618 * The first receive after SPA_VERSION_RECVD_PROPS is a 3619 * special case where we blow away all local properties 3620 * regardless. 3621 */ 3622 if (!first_recvd_props) 3623 props_reduce(props, origprops); 3624 if (zfs_check_clearable(tofs, origprops, 3625 &errlist) != 0) 3626 (void) nvlist_merge(errors, errlist, 0); 3627 nvlist_free(errlist); 3628 } 3629 3630 dmu_objset_rele(os, FTAG); 3631 } 3632 3633 if (zc->zc_string[0]) { 3634 error = dmu_objset_hold(zc->zc_string, FTAG, &origin); 3635 if (error) 3636 goto out; 3637 } 3638 3639 error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds, 3640 &zc->zc_begin_record, force, origin, &drc); 3641 if (origin) 3642 dmu_objset_rele(origin, FTAG); 3643 if (error) 3644 goto out; 3645 3646 /* 3647 * Set properties before we receive the stream so that they are applied 3648 * to the new data. Note that we must call dmu_recv_stream() if 3649 * dmu_recv_begin() succeeds. 3650 */ 3651 if (props) { 3652 nvlist_t *errlist; 3653 3654 if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) { 3655 if (drc.drc_newfs) { 3656 if (spa_version(os->os_spa) >= 3657 SPA_VERSION_RECVD_PROPS) 3658 first_recvd_props = B_TRUE; 3659 } else if (origprops != NULL) { 3660 if (clear_received_props(os, tofs, origprops, 3661 first_recvd_props ? NULL : props) != 0) 3662 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3663 } else { 3664 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3665 } 3666 dsl_prop_set_hasrecvd(os); 3667 } else if (!drc.drc_newfs) { 3668 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3669 } 3670 3671 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 3672 props, &errlist); 3673 (void) nvlist_merge(errors, errlist, 0); 3674 nvlist_free(errlist); 3675 } 3676 3677 if (fit_error_list(zc, &errors) != 0 || put_nvlist(zc, errors) != 0) { 3678 /* 3679 * Caller made zc->zc_nvlist_dst less than the minimum expected 3680 * size or supplied an invalid address. 3681 */ 3682 props_error = EINVAL; 3683 } 3684 3685 off = fp->f_offset; 3686 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd, 3687 &zc->zc_action_handle); 3688 3689 if (error == 0) { 3690 zfsvfs_t *zfsvfs = NULL; 3691 3692 if (getzfsvfs(tofs, &zfsvfs) == 0) { 3693 /* online recv */ 3694 int end_err; 3695 3696 error = zfs_suspend_fs(zfsvfs); 3697 /* 3698 * If the suspend fails, then the recv_end will 3699 * likely also fail, and clean up after itself. 3700 */ 3701 end_err = dmu_recv_end(&drc); 3702 if (error == 0) 3703 error = zfs_resume_fs(zfsvfs, tofs); 3704 error = error ? error : end_err; 3705 VFS_RELE(zfsvfs->z_vfs); 3706 } else { 3707 error = dmu_recv_end(&drc); 3708 } 3709 } 3710 3711 zc->zc_cookie = off - fp->f_offset; 3712 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 3713 fp->f_offset = off; 3714 3715 #ifdef DEBUG 3716 if (zfs_ioc_recv_inject_err) { 3717 zfs_ioc_recv_inject_err = B_FALSE; 3718 error = 1; 3719 } 3720 #endif 3721 /* 3722 * On error, restore the original props. 3723 */ 3724 if (error && props) { 3725 if (dmu_objset_hold(tofs, FTAG, &os) == 0) { 3726 if (clear_received_props(os, tofs, props, NULL) != 0) { 3727 /* 3728 * We failed to clear the received properties. 3729 * Since we may have left a $recvd value on the 3730 * system, we can't clear the $hasrecvd flag. 3731 */ 3732 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3733 } else if (first_recvd_props) { 3734 dsl_prop_unset_hasrecvd(os); 3735 } 3736 dmu_objset_rele(os, FTAG); 3737 } else if (!drc.drc_newfs) { 3738 /* We failed to clear the received properties. */ 3739 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3740 } 3741 3742 if (origprops == NULL && !drc.drc_newfs) { 3743 /* We failed to stash the original properties. */ 3744 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3745 } 3746 3747 /* 3748 * dsl_props_set() will not convert RECEIVED to LOCAL on or 3749 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 3750 * explictly if we're restoring local properties cleared in the 3751 * first new-style receive. 3752 */ 3753 if (origprops != NULL && 3754 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 3755 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 3756 origprops, NULL) != 0) { 3757 /* 3758 * We stashed the original properties but failed to 3759 * restore them. 3760 */ 3761 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3762 } 3763 } 3764 out: 3765 nvlist_free(props); 3766 nvlist_free(origprops); 3767 nvlist_free(errors); 3768 releasef(fd); 3769 3770 if (error == 0) 3771 error = props_error; 3772 3773 return (error); 3774 } 3775 3776 /* 3777 * inputs: 3778 * zc_name name of snapshot to send 3779 * zc_cookie file descriptor to send stream to 3780 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj) 3781 * zc_sendobj objsetid of snapshot to send 3782 * zc_fromobj objsetid of incremental fromsnap (may be zero) 3783 * 3784 * outputs: none 3785 */ 3786 static int 3787 zfs_ioc_send(zfs_cmd_t *zc) 3788 { 3789 objset_t *fromsnap = NULL; 3790 objset_t *tosnap; 3791 file_t *fp; 3792 int error; 3793 offset_t off; 3794 dsl_dataset_t *ds; 3795 dsl_dataset_t *dsfrom = NULL; 3796 spa_t *spa; 3797 dsl_pool_t *dp; 3798 3799 error = spa_open(zc->zc_name, &spa, FTAG); 3800 if (error) 3801 return (error); 3802 3803 dp = spa_get_dsl(spa); 3804 rw_enter(&dp->dp_config_rwlock, RW_READER); 3805 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 3806 rw_exit(&dp->dp_config_rwlock); 3807 if (error) { 3808 spa_close(spa, FTAG); 3809 return (error); 3810 } 3811 3812 error = dmu_objset_from_ds(ds, &tosnap); 3813 if (error) { 3814 dsl_dataset_rele(ds, FTAG); 3815 spa_close(spa, FTAG); 3816 return (error); 3817 } 3818 3819 if (zc->zc_fromobj != 0) { 3820 rw_enter(&dp->dp_config_rwlock, RW_READER); 3821 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom); 3822 rw_exit(&dp->dp_config_rwlock); 3823 spa_close(spa, FTAG); 3824 if (error) { 3825 dsl_dataset_rele(ds, FTAG); 3826 return (error); 3827 } 3828 error = dmu_objset_from_ds(dsfrom, &fromsnap); 3829 if (error) { 3830 dsl_dataset_rele(dsfrom, FTAG); 3831 dsl_dataset_rele(ds, FTAG); 3832 return (error); 3833 } 3834 } else { 3835 spa_close(spa, FTAG); 3836 } 3837 3838 fp = getf(zc->zc_cookie); 3839 if (fp == NULL) { 3840 dsl_dataset_rele(ds, FTAG); 3841 if (dsfrom) 3842 dsl_dataset_rele(dsfrom, FTAG); 3843 return (EBADF); 3844 } 3845 3846 off = fp->f_offset; 3847 error = dmu_sendbackup(tosnap, fromsnap, zc->zc_obj, fp->f_vnode, &off); 3848 3849 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 3850 fp->f_offset = off; 3851 releasef(zc->zc_cookie); 3852 if (dsfrom) 3853 dsl_dataset_rele(dsfrom, FTAG); 3854 dsl_dataset_rele(ds, FTAG); 3855 return (error); 3856 } 3857 3858 static int 3859 zfs_ioc_inject_fault(zfs_cmd_t *zc) 3860 { 3861 int id, error; 3862 3863 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 3864 &zc->zc_inject_record); 3865 3866 if (error == 0) 3867 zc->zc_guid = (uint64_t)id; 3868 3869 return (error); 3870 } 3871 3872 static int 3873 zfs_ioc_clear_fault(zfs_cmd_t *zc) 3874 { 3875 return (zio_clear_fault((int)zc->zc_guid)); 3876 } 3877 3878 static int 3879 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 3880 { 3881 int id = (int)zc->zc_guid; 3882 int error; 3883 3884 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 3885 &zc->zc_inject_record); 3886 3887 zc->zc_guid = id; 3888 3889 return (error); 3890 } 3891 3892 static int 3893 zfs_ioc_error_log(zfs_cmd_t *zc) 3894 { 3895 spa_t *spa; 3896 int error; 3897 size_t count = (size_t)zc->zc_nvlist_dst_size; 3898 3899 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 3900 return (error); 3901 3902 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 3903 &count); 3904 if (error == 0) 3905 zc->zc_nvlist_dst_size = count; 3906 else 3907 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 3908 3909 spa_close(spa, FTAG); 3910 3911 return (error); 3912 } 3913 3914 static int 3915 zfs_ioc_clear(zfs_cmd_t *zc) 3916 { 3917 spa_t *spa; 3918 vdev_t *vd; 3919 int error; 3920 3921 /* 3922 * On zpool clear we also fix up missing slogs 3923 */ 3924 mutex_enter(&spa_namespace_lock); 3925 spa = spa_lookup(zc->zc_name); 3926 if (spa == NULL) { 3927 mutex_exit(&spa_namespace_lock); 3928 return (EIO); 3929 } 3930 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 3931 /* we need to let spa_open/spa_load clear the chains */ 3932 spa_set_log_state(spa, SPA_LOG_CLEAR); 3933 } 3934 spa->spa_last_open_failed = 0; 3935 mutex_exit(&spa_namespace_lock); 3936 3937 if (zc->zc_cookie & ZPOOL_NO_REWIND) { 3938 error = spa_open(zc->zc_name, &spa, FTAG); 3939 } else { 3940 nvlist_t *policy; 3941 nvlist_t *config = NULL; 3942 3943 if (zc->zc_nvlist_src == NULL) 3944 return (EINVAL); 3945 3946 if ((error = get_nvlist(zc->zc_nvlist_src, 3947 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 3948 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 3949 policy, &config); 3950 if (config != NULL) { 3951 int err; 3952 3953 if ((err = put_nvlist(zc, config)) != 0) 3954 error = err; 3955 nvlist_free(config); 3956 } 3957 nvlist_free(policy); 3958 } 3959 } 3960 3961 if (error) 3962 return (error); 3963 3964 spa_vdev_state_enter(spa, SCL_NONE); 3965 3966 if (zc->zc_guid == 0) { 3967 vd = NULL; 3968 } else { 3969 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 3970 if (vd == NULL) { 3971 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 3972 spa_close(spa, FTAG); 3973 return (ENODEV); 3974 } 3975 } 3976 3977 vdev_clear(spa, vd); 3978 3979 (void) spa_vdev_state_exit(spa, NULL, 0); 3980 3981 /* 3982 * Resume any suspended I/Os. 3983 */ 3984 if (zio_resume(spa) != 0) 3985 error = EIO; 3986 3987 spa_close(spa, FTAG); 3988 3989 return (error); 3990 } 3991 3992 /* 3993 * inputs: 3994 * zc_name name of filesystem 3995 * zc_value name of origin snapshot 3996 * 3997 * outputs: 3998 * zc_string name of conflicting snapshot, if there is one 3999 */ 4000 static int 4001 zfs_ioc_promote(zfs_cmd_t *zc) 4002 { 4003 char *cp; 4004 4005 /* 4006 * We don't need to unmount *all* the origin fs's snapshots, but 4007 * it's easier. 4008 */ 4009 cp = strchr(zc->zc_value, '@'); 4010 if (cp) 4011 *cp = '\0'; 4012 (void) dmu_objset_find(zc->zc_value, 4013 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS); 4014 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 4015 } 4016 4017 /* 4018 * Retrieve a single {user|group}{used|quota}@... property. 4019 * 4020 * inputs: 4021 * zc_name name of filesystem 4022 * zc_objset_type zfs_userquota_prop_t 4023 * zc_value domain name (eg. "S-1-234-567-89") 4024 * zc_guid RID/UID/GID 4025 * 4026 * outputs: 4027 * zc_cookie property value 4028 */ 4029 static int 4030 zfs_ioc_userspace_one(zfs_cmd_t *zc) 4031 { 4032 zfsvfs_t *zfsvfs; 4033 int error; 4034 4035 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 4036 return (EINVAL); 4037 4038 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4039 if (error) 4040 return (error); 4041 4042 error = zfs_userspace_one(zfsvfs, 4043 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 4044 zfsvfs_rele(zfsvfs, FTAG); 4045 4046 return (error); 4047 } 4048 4049 /* 4050 * inputs: 4051 * zc_name name of filesystem 4052 * zc_cookie zap cursor 4053 * zc_objset_type zfs_userquota_prop_t 4054 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 4055 * 4056 * outputs: 4057 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 4058 * zc_cookie zap cursor 4059 */ 4060 static int 4061 zfs_ioc_userspace_many(zfs_cmd_t *zc) 4062 { 4063 zfsvfs_t *zfsvfs; 4064 int bufsize = zc->zc_nvlist_dst_size; 4065 4066 if (bufsize <= 0) 4067 return (ENOMEM); 4068 4069 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4070 if (error) 4071 return (error); 4072 4073 void *buf = kmem_alloc(bufsize, KM_SLEEP); 4074 4075 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 4076 buf, &zc->zc_nvlist_dst_size); 4077 4078 if (error == 0) { 4079 error = xcopyout(buf, 4080 (void *)(uintptr_t)zc->zc_nvlist_dst, 4081 zc->zc_nvlist_dst_size); 4082 } 4083 kmem_free(buf, bufsize); 4084 zfsvfs_rele(zfsvfs, FTAG); 4085 4086 return (error); 4087 } 4088 4089 /* 4090 * inputs: 4091 * zc_name name of filesystem 4092 * 4093 * outputs: 4094 * none 4095 */ 4096 static int 4097 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 4098 { 4099 objset_t *os; 4100 int error = 0; 4101 zfsvfs_t *zfsvfs; 4102 4103 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 4104 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 4105 /* 4106 * If userused is not enabled, it may be because the 4107 * objset needs to be closed & reopened (to grow the 4108 * objset_phys_t). Suspend/resume the fs will do that. 4109 */ 4110 error = zfs_suspend_fs(zfsvfs); 4111 if (error == 0) 4112 error = zfs_resume_fs(zfsvfs, zc->zc_name); 4113 } 4114 if (error == 0) 4115 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 4116 VFS_RELE(zfsvfs->z_vfs); 4117 } else { 4118 /* XXX kind of reading contents without owning */ 4119 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4120 if (error) 4121 return (error); 4122 4123 error = dmu_objset_userspace_upgrade(os); 4124 dmu_objset_rele(os, FTAG); 4125 } 4126 4127 return (error); 4128 } 4129 4130 /* 4131 * We don't want to have a hard dependency 4132 * against some special symbols in sharefs 4133 * nfs, and smbsrv. Determine them if needed when 4134 * the first file system is shared. 4135 * Neither sharefs, nfs or smbsrv are unloadable modules. 4136 */ 4137 int (*znfsexport_fs)(void *arg); 4138 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 4139 int (*zsmbexport_fs)(void *arg, boolean_t add_share); 4140 4141 int zfs_nfsshare_inited; 4142 int zfs_smbshare_inited; 4143 4144 ddi_modhandle_t nfs_mod; 4145 ddi_modhandle_t sharefs_mod; 4146 ddi_modhandle_t smbsrv_mod; 4147 kmutex_t zfs_share_lock; 4148 4149 static int 4150 zfs_init_sharefs() 4151 { 4152 int error; 4153 4154 ASSERT(MUTEX_HELD(&zfs_share_lock)); 4155 /* Both NFS and SMB shares also require sharetab support. */ 4156 if (sharefs_mod == NULL && ((sharefs_mod = 4157 ddi_modopen("fs/sharefs", 4158 KRTLD_MODE_FIRST, &error)) == NULL)) { 4159 return (ENOSYS); 4160 } 4161 if (zshare_fs == NULL && ((zshare_fs = 4162 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 4163 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 4164 return (ENOSYS); 4165 } 4166 return (0); 4167 } 4168 4169 static int 4170 zfs_ioc_share(zfs_cmd_t *zc) 4171 { 4172 int error; 4173 int opcode; 4174 4175 switch (zc->zc_share.z_sharetype) { 4176 case ZFS_SHARE_NFS: 4177 case ZFS_UNSHARE_NFS: 4178 if (zfs_nfsshare_inited == 0) { 4179 mutex_enter(&zfs_share_lock); 4180 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 4181 KRTLD_MODE_FIRST, &error)) == NULL)) { 4182 mutex_exit(&zfs_share_lock); 4183 return (ENOSYS); 4184 } 4185 if (znfsexport_fs == NULL && 4186 ((znfsexport_fs = (int (*)(void *)) 4187 ddi_modsym(nfs_mod, 4188 "nfs_export", &error)) == NULL)) { 4189 mutex_exit(&zfs_share_lock); 4190 return (ENOSYS); 4191 } 4192 error = zfs_init_sharefs(); 4193 if (error) { 4194 mutex_exit(&zfs_share_lock); 4195 return (ENOSYS); 4196 } 4197 zfs_nfsshare_inited = 1; 4198 mutex_exit(&zfs_share_lock); 4199 } 4200 break; 4201 case ZFS_SHARE_SMB: 4202 case ZFS_UNSHARE_SMB: 4203 if (zfs_smbshare_inited == 0) { 4204 mutex_enter(&zfs_share_lock); 4205 if (smbsrv_mod == NULL && ((smbsrv_mod = 4206 ddi_modopen("drv/smbsrv", 4207 KRTLD_MODE_FIRST, &error)) == NULL)) { 4208 mutex_exit(&zfs_share_lock); 4209 return (ENOSYS); 4210 } 4211 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 4212 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 4213 "smb_server_share", &error)) == NULL)) { 4214 mutex_exit(&zfs_share_lock); 4215 return (ENOSYS); 4216 } 4217 error = zfs_init_sharefs(); 4218 if (error) { 4219 mutex_exit(&zfs_share_lock); 4220 return (ENOSYS); 4221 } 4222 zfs_smbshare_inited = 1; 4223 mutex_exit(&zfs_share_lock); 4224 } 4225 break; 4226 default: 4227 return (EINVAL); 4228 } 4229 4230 switch (zc->zc_share.z_sharetype) { 4231 case ZFS_SHARE_NFS: 4232 case ZFS_UNSHARE_NFS: 4233 if (error = 4234 znfsexport_fs((void *) 4235 (uintptr_t)zc->zc_share.z_exportdata)) 4236 return (error); 4237 break; 4238 case ZFS_SHARE_SMB: 4239 case ZFS_UNSHARE_SMB: 4240 if (error = zsmbexport_fs((void *) 4241 (uintptr_t)zc->zc_share.z_exportdata, 4242 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 4243 B_TRUE: B_FALSE)) { 4244 return (error); 4245 } 4246 break; 4247 } 4248 4249 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 4250 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 4251 SHAREFS_ADD : SHAREFS_REMOVE; 4252 4253 /* 4254 * Add or remove share from sharetab 4255 */ 4256 error = zshare_fs(opcode, 4257 (void *)(uintptr_t)zc->zc_share.z_sharedata, 4258 zc->zc_share.z_sharemax); 4259 4260 return (error); 4261 4262 } 4263 4264 ace_t full_access[] = { 4265 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 4266 }; 4267 4268 /* 4269 * inputs: 4270 * zc_name name of containing filesystem 4271 * zc_obj object # beyond which we want next in-use object # 4272 * 4273 * outputs: 4274 * zc_obj next in-use object # 4275 */ 4276 static int 4277 zfs_ioc_next_obj(zfs_cmd_t *zc) 4278 { 4279 objset_t *os = NULL; 4280 int error; 4281 4282 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4283 if (error) 4284 return (error); 4285 4286 error = dmu_object_next(os, &zc->zc_obj, B_FALSE, 4287 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg); 4288 4289 dmu_objset_rele(os, FTAG); 4290 return (error); 4291 } 4292 4293 /* 4294 * inputs: 4295 * zc_name name of filesystem 4296 * zc_value prefix name for snapshot 4297 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 4298 * 4299 * outputs: 4300 */ 4301 static int 4302 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc) 4303 { 4304 char *snap_name; 4305 int error; 4306 4307 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value, 4308 (u_longlong_t)ddi_get_lbolt64()); 4309 4310 if (strlen(snap_name) >= MAXNAMELEN) { 4311 strfree(snap_name); 4312 return (E2BIG); 4313 } 4314 4315 error = dmu_objset_snapshot(zc->zc_name, snap_name, snap_name, 4316 NULL, B_FALSE, B_TRUE, zc->zc_cleanup_fd); 4317 if (error != 0) { 4318 strfree(snap_name); 4319 return (error); 4320 } 4321 4322 (void) strcpy(zc->zc_value, snap_name); 4323 strfree(snap_name); 4324 return (0); 4325 } 4326 4327 /* 4328 * inputs: 4329 * zc_name name of "to" snapshot 4330 * zc_value name of "from" snapshot 4331 * zc_cookie file descriptor to write diff data on 4332 * 4333 * outputs: 4334 * dmu_diff_record_t's to the file descriptor 4335 */ 4336 static int 4337 zfs_ioc_diff(zfs_cmd_t *zc) 4338 { 4339 objset_t *fromsnap; 4340 objset_t *tosnap; 4341 file_t *fp; 4342 offset_t off; 4343 int error; 4344 4345 error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap); 4346 if (error) 4347 return (error); 4348 4349 error = dmu_objset_hold(zc->zc_value, FTAG, &fromsnap); 4350 if (error) { 4351 dmu_objset_rele(tosnap, FTAG); 4352 return (error); 4353 } 4354 4355 fp = getf(zc->zc_cookie); 4356 if (fp == NULL) { 4357 dmu_objset_rele(fromsnap, FTAG); 4358 dmu_objset_rele(tosnap, FTAG); 4359 return (EBADF); 4360 } 4361 4362 off = fp->f_offset; 4363 4364 error = dmu_diff(tosnap, fromsnap, fp->f_vnode, &off); 4365 4366 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4367 fp->f_offset = off; 4368 releasef(zc->zc_cookie); 4369 4370 dmu_objset_rele(fromsnap, FTAG); 4371 dmu_objset_rele(tosnap, FTAG); 4372 return (error); 4373 } 4374 4375 /* 4376 * Remove all ACL files in shares dir 4377 */ 4378 static int 4379 zfs_smb_acl_purge(znode_t *dzp) 4380 { 4381 zap_cursor_t zc; 4382 zap_attribute_t zap; 4383 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 4384 int error; 4385 4386 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 4387 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 4388 zap_cursor_advance(&zc)) { 4389 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 4390 NULL, 0)) != 0) 4391 break; 4392 } 4393 zap_cursor_fini(&zc); 4394 return (error); 4395 } 4396 4397 static int 4398 zfs_ioc_smb_acl(zfs_cmd_t *zc) 4399 { 4400 vnode_t *vp; 4401 znode_t *dzp; 4402 vnode_t *resourcevp = NULL; 4403 znode_t *sharedir; 4404 zfsvfs_t *zfsvfs; 4405 nvlist_t *nvlist; 4406 char *src, *target; 4407 vattr_t vattr; 4408 vsecattr_t vsec; 4409 int error = 0; 4410 4411 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 4412 NO_FOLLOW, NULL, &vp)) != 0) 4413 return (error); 4414 4415 /* Now make sure mntpnt and dataset are ZFS */ 4416 4417 if (vp->v_vfsp->vfs_fstype != zfsfstype || 4418 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 4419 zc->zc_name) != 0)) { 4420 VN_RELE(vp); 4421 return (EINVAL); 4422 } 4423 4424 dzp = VTOZ(vp); 4425 zfsvfs = dzp->z_zfsvfs; 4426 ZFS_ENTER(zfsvfs); 4427 4428 /* 4429 * Create share dir if its missing. 4430 */ 4431 mutex_enter(&zfsvfs->z_lock); 4432 if (zfsvfs->z_shares_dir == 0) { 4433 dmu_tx_t *tx; 4434 4435 tx = dmu_tx_create(zfsvfs->z_os); 4436 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 4437 ZFS_SHARES_DIR); 4438 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 4439 error = dmu_tx_assign(tx, TXG_WAIT); 4440 if (error) { 4441 dmu_tx_abort(tx); 4442 } else { 4443 error = zfs_create_share_dir(zfsvfs, tx); 4444 dmu_tx_commit(tx); 4445 } 4446 if (error) { 4447 mutex_exit(&zfsvfs->z_lock); 4448 VN_RELE(vp); 4449 ZFS_EXIT(zfsvfs); 4450 return (error); 4451 } 4452 } 4453 mutex_exit(&zfsvfs->z_lock); 4454 4455 ASSERT(zfsvfs->z_shares_dir); 4456 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 4457 VN_RELE(vp); 4458 ZFS_EXIT(zfsvfs); 4459 return (error); 4460 } 4461 4462 switch (zc->zc_cookie) { 4463 case ZFS_SMB_ACL_ADD: 4464 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 4465 vattr.va_type = VREG; 4466 vattr.va_mode = S_IFREG|0777; 4467 vattr.va_uid = 0; 4468 vattr.va_gid = 0; 4469 4470 vsec.vsa_mask = VSA_ACE; 4471 vsec.vsa_aclentp = &full_access; 4472 vsec.vsa_aclentsz = sizeof (full_access); 4473 vsec.vsa_aclcnt = 1; 4474 4475 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 4476 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 4477 if (resourcevp) 4478 VN_RELE(resourcevp); 4479 break; 4480 4481 case ZFS_SMB_ACL_REMOVE: 4482 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 4483 NULL, 0); 4484 break; 4485 4486 case ZFS_SMB_ACL_RENAME: 4487 if ((error = get_nvlist(zc->zc_nvlist_src, 4488 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 4489 VN_RELE(vp); 4490 ZFS_EXIT(zfsvfs); 4491 return (error); 4492 } 4493 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 4494 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 4495 &target)) { 4496 VN_RELE(vp); 4497 VN_RELE(ZTOV(sharedir)); 4498 ZFS_EXIT(zfsvfs); 4499 nvlist_free(nvlist); 4500 return (error); 4501 } 4502 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 4503 kcred, NULL, 0); 4504 nvlist_free(nvlist); 4505 break; 4506 4507 case ZFS_SMB_ACL_PURGE: 4508 error = zfs_smb_acl_purge(sharedir); 4509 break; 4510 4511 default: 4512 error = EINVAL; 4513 break; 4514 } 4515 4516 VN_RELE(vp); 4517 VN_RELE(ZTOV(sharedir)); 4518 4519 ZFS_EXIT(zfsvfs); 4520 4521 return (error); 4522 } 4523 4524 /* 4525 * inputs: 4526 * zc_name name of filesystem 4527 * zc_value short name of snap 4528 * zc_string user-supplied tag for this hold 4529 * zc_cookie recursive flag 4530 * zc_temphold set if hold is temporary 4531 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 4532 * zc_sendobj if non-zero, the objid for zc_name@zc_value 4533 * zc_createtxg if zc_sendobj is non-zero, snap must have zc_createtxg 4534 * 4535 * outputs: none 4536 */ 4537 static int 4538 zfs_ioc_hold(zfs_cmd_t *zc) 4539 { 4540 boolean_t recursive = zc->zc_cookie; 4541 spa_t *spa; 4542 dsl_pool_t *dp; 4543 dsl_dataset_t *ds; 4544 int error; 4545 minor_t minor = 0; 4546 4547 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 4548 return (EINVAL); 4549 4550 if (zc->zc_sendobj == 0) { 4551 return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value, 4552 zc->zc_string, recursive, zc->zc_temphold, 4553 zc->zc_cleanup_fd)); 4554 } 4555 4556 if (recursive) 4557 return (EINVAL); 4558 4559 error = spa_open(zc->zc_name, &spa, FTAG); 4560 if (error) 4561 return (error); 4562 4563 dp = spa_get_dsl(spa); 4564 rw_enter(&dp->dp_config_rwlock, RW_READER); 4565 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 4566 rw_exit(&dp->dp_config_rwlock); 4567 spa_close(spa, FTAG); 4568 if (error) 4569 return (error); 4570 4571 /* 4572 * Until we have a hold on this snapshot, it's possible that 4573 * zc_sendobj could've been destroyed and reused as part 4574 * of a later txg. Make sure we're looking at the right object. 4575 */ 4576 if (zc->zc_createtxg != ds->ds_phys->ds_creation_txg) { 4577 dsl_dataset_rele(ds, FTAG); 4578 return (ENOENT); 4579 } 4580 4581 if (zc->zc_cleanup_fd != -1 && zc->zc_temphold) { 4582 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor); 4583 if (error) { 4584 dsl_dataset_rele(ds, FTAG); 4585 return (error); 4586 } 4587 } 4588 4589 error = dsl_dataset_user_hold_for_send(ds, zc->zc_string, 4590 zc->zc_temphold); 4591 if (minor != 0) { 4592 if (error == 0) { 4593 dsl_register_onexit_hold_cleanup(ds, zc->zc_string, 4594 minor); 4595 } 4596 zfs_onexit_fd_rele(zc->zc_cleanup_fd); 4597 } 4598 dsl_dataset_rele(ds, FTAG); 4599 4600 return (error); 4601 } 4602 4603 /* 4604 * inputs: 4605 * zc_name name of dataset from which we're releasing a user hold 4606 * zc_value short name of snap 4607 * zc_string user-supplied tag for this hold 4608 * zc_cookie recursive flag 4609 * 4610 * outputs: none 4611 */ 4612 static int 4613 zfs_ioc_release(zfs_cmd_t *zc) 4614 { 4615 boolean_t recursive = zc->zc_cookie; 4616 4617 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 4618 return (EINVAL); 4619 4620 return (dsl_dataset_user_release(zc->zc_name, zc->zc_value, 4621 zc->zc_string, recursive)); 4622 } 4623 4624 /* 4625 * inputs: 4626 * zc_name name of filesystem 4627 * 4628 * outputs: 4629 * zc_nvlist_src{_size} nvlist of snapshot holds 4630 */ 4631 static int 4632 zfs_ioc_get_holds(zfs_cmd_t *zc) 4633 { 4634 nvlist_t *nvp; 4635 int error; 4636 4637 if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) { 4638 error = put_nvlist(zc, nvp); 4639 nvlist_free(nvp); 4640 } 4641 4642 return (error); 4643 } 4644 4645 /* 4646 * pool create, destroy, and export don't log the history as part of 4647 * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export 4648 * do the logging of those commands. 4649 */ 4650 static zfs_ioc_vec_t zfs_ioc_vec[] = { 4651 { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4652 POOL_CHECK_NONE }, 4653 { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4654 POOL_CHECK_NONE }, 4655 { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4656 POOL_CHECK_NONE }, 4657 { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4658 POOL_CHECK_NONE }, 4659 { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE, 4660 POOL_CHECK_NONE }, 4661 { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE, 4662 POOL_CHECK_NONE }, 4663 { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE, 4664 POOL_CHECK_NONE }, 4665 { zfs_ioc_pool_scan, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4666 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4667 { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE, 4668 POOL_CHECK_READONLY }, 4669 { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4670 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4671 { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4672 POOL_CHECK_NONE }, 4673 { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4674 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4675 { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4676 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4677 { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4678 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4679 { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4680 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4681 { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4682 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4683 { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4684 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4685 { zfs_ioc_vdev_setfru, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4686 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4687 { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4688 POOL_CHECK_SUSPENDED }, 4689 { zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4690 POOL_CHECK_NONE }, 4691 { zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4692 POOL_CHECK_SUSPENDED }, 4693 { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4694 POOL_CHECK_SUSPENDED }, 4695 { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE, 4696 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4697 { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE, 4698 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4699 { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE, 4700 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4701 { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE, 4702 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4703 { zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE, 4704 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4705 { zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE, 4706 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4707 { zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE, 4708 POOL_CHECK_NONE }, 4709 { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4710 POOL_CHECK_NONE }, 4711 { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4712 POOL_CHECK_NONE }, 4713 { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4714 POOL_CHECK_NONE }, 4715 { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE, 4716 POOL_CHECK_NONE }, 4717 { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4718 POOL_CHECK_NONE }, 4719 { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE, 4720 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4721 { zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, DATASET_NAME, 4722 B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4723 { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE, 4724 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4725 { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_diff, POOL_NAME, B_FALSE, 4726 POOL_CHECK_NONE }, 4727 { zfs_ioc_obj_to_path, zfs_secpolicy_diff, DATASET_NAME, B_FALSE, 4728 POOL_CHECK_SUSPENDED }, 4729 { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4730 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4731 { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE, 4732 POOL_CHECK_NONE }, 4733 { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE, 4734 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4735 { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4736 POOL_CHECK_NONE }, 4737 { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE, 4738 POOL_CHECK_NONE }, 4739 { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE, 4740 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4741 { zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE, 4742 POOL_CHECK_NONE }, 4743 { zfs_ioc_userspace_one, zfs_secpolicy_userspace_one, DATASET_NAME, 4744 B_FALSE, POOL_CHECK_NONE }, 4745 { zfs_ioc_userspace_many, zfs_secpolicy_userspace_many, DATASET_NAME, 4746 B_FALSE, POOL_CHECK_NONE }, 4747 { zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 4748 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4749 { zfs_ioc_hold, zfs_secpolicy_hold, DATASET_NAME, B_TRUE, 4750 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4751 { zfs_ioc_release, zfs_secpolicy_release, DATASET_NAME, B_TRUE, 4752 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4753 { zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4754 POOL_CHECK_SUSPENDED }, 4755 { zfs_ioc_objset_recvd_props, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4756 POOL_CHECK_NONE }, 4757 { zfs_ioc_vdev_split, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4758 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4759 { zfs_ioc_next_obj, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4760 POOL_CHECK_NONE }, 4761 { zfs_ioc_diff, zfs_secpolicy_diff, DATASET_NAME, B_FALSE, 4762 POOL_CHECK_NONE }, 4763 { zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, DATASET_NAME, 4764 B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4765 { zfs_ioc_obj_to_stats, zfs_secpolicy_diff, DATASET_NAME, B_FALSE, 4766 POOL_CHECK_SUSPENDED }, 4767 { zfs_ioc_pool_reguid, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4768 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY } 4769 }; 4770 4771 int 4772 pool_status_check(const char *name, zfs_ioc_namecheck_t type, 4773 zfs_ioc_poolcheck_t check) 4774 { 4775 spa_t *spa; 4776 int error; 4777 4778 ASSERT(type == POOL_NAME || type == DATASET_NAME); 4779 4780 if (check & POOL_CHECK_NONE) 4781 return (0); 4782 4783 error = spa_open(name, &spa, FTAG); 4784 if (error == 0) { 4785 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa)) 4786 error = EAGAIN; 4787 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa)) 4788 error = EROFS; 4789 spa_close(spa, FTAG); 4790 } 4791 return (error); 4792 } 4793 4794 /* 4795 * Find a free minor number. 4796 */ 4797 minor_t 4798 zfsdev_minor_alloc(void) 4799 { 4800 static minor_t last_minor; 4801 minor_t m; 4802 4803 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 4804 4805 for (m = last_minor + 1; m != last_minor; m++) { 4806 if (m > ZFSDEV_MAX_MINOR) 4807 m = 1; 4808 if (ddi_get_soft_state(zfsdev_state, m) == NULL) { 4809 last_minor = m; 4810 return (m); 4811 } 4812 } 4813 4814 return (0); 4815 } 4816 4817 static int 4818 zfs_ctldev_init(dev_t *devp) 4819 { 4820 minor_t minor; 4821 zfs_soft_state_t *zs; 4822 4823 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 4824 ASSERT(getminor(*devp) == 0); 4825 4826 minor = zfsdev_minor_alloc(); 4827 if (minor == 0) 4828 return (ENXIO); 4829 4830 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) 4831 return (EAGAIN); 4832 4833 *devp = makedevice(getemajor(*devp), minor); 4834 4835 zs = ddi_get_soft_state(zfsdev_state, minor); 4836 zs->zss_type = ZSST_CTLDEV; 4837 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data); 4838 4839 return (0); 4840 } 4841 4842 static void 4843 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor) 4844 { 4845 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 4846 4847 zfs_onexit_destroy(zo); 4848 ddi_soft_state_free(zfsdev_state, minor); 4849 } 4850 4851 void * 4852 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which) 4853 { 4854 zfs_soft_state_t *zp; 4855 4856 zp = ddi_get_soft_state(zfsdev_state, minor); 4857 if (zp == NULL || zp->zss_type != which) 4858 return (NULL); 4859 4860 return (zp->zss_data); 4861 } 4862 4863 static int 4864 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr) 4865 { 4866 int error = 0; 4867 4868 if (getminor(*devp) != 0) 4869 return (zvol_open(devp, flag, otyp, cr)); 4870 4871 /* This is the control device. Allocate a new minor if requested. */ 4872 if (flag & FEXCL) { 4873 mutex_enter(&zfsdev_state_lock); 4874 error = zfs_ctldev_init(devp); 4875 mutex_exit(&zfsdev_state_lock); 4876 } 4877 4878 return (error); 4879 } 4880 4881 static int 4882 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr) 4883 { 4884 zfs_onexit_t *zo; 4885 minor_t minor = getminor(dev); 4886 4887 if (minor == 0) 4888 return (0); 4889 4890 mutex_enter(&zfsdev_state_lock); 4891 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV); 4892 if (zo == NULL) { 4893 mutex_exit(&zfsdev_state_lock); 4894 return (zvol_close(dev, flag, otyp, cr)); 4895 } 4896 zfs_ctldev_destroy(zo, minor); 4897 mutex_exit(&zfsdev_state_lock); 4898 4899 return (0); 4900 } 4901 4902 static int 4903 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 4904 { 4905 zfs_cmd_t *zc; 4906 uint_t vec; 4907 int error, rc; 4908 minor_t minor = getminor(dev); 4909 4910 if (minor != 0 && 4911 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL) 4912 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 4913 4914 vec = cmd - ZFS_IOC; 4915 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 4916 4917 if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 4918 return (EINVAL); 4919 4920 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 4921 4922 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 4923 if (error != 0) 4924 error = EFAULT; 4925 4926 if ((error == 0) && !(flag & FKIOCTL)) 4927 error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr); 4928 4929 /* 4930 * Ensure that all pool/dataset names are valid before we pass down to 4931 * the lower layers. 4932 */ 4933 if (error == 0) { 4934 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 4935 zc->zc_iflags = flag & FKIOCTL; 4936 switch (zfs_ioc_vec[vec].zvec_namecheck) { 4937 case POOL_NAME: 4938 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 4939 error = EINVAL; 4940 error = pool_status_check(zc->zc_name, 4941 zfs_ioc_vec[vec].zvec_namecheck, 4942 zfs_ioc_vec[vec].zvec_pool_check); 4943 break; 4944 4945 case DATASET_NAME: 4946 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 4947 error = EINVAL; 4948 error = pool_status_check(zc->zc_name, 4949 zfs_ioc_vec[vec].zvec_namecheck, 4950 zfs_ioc_vec[vec].zvec_pool_check); 4951 break; 4952 4953 case NO_NAME: 4954 break; 4955 } 4956 } 4957 4958 if (error == 0) 4959 error = zfs_ioc_vec[vec].zvec_func(zc); 4960 4961 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 4962 if (error == 0) { 4963 if (rc != 0) 4964 error = EFAULT; 4965 if (zfs_ioc_vec[vec].zvec_his_log) 4966 zfs_log_history(zc); 4967 } 4968 4969 kmem_free(zc, sizeof (zfs_cmd_t)); 4970 return (error); 4971 } 4972 4973 static int 4974 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 4975 { 4976 if (cmd != DDI_ATTACH) 4977 return (DDI_FAILURE); 4978 4979 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 4980 DDI_PSEUDO, 0) == DDI_FAILURE) 4981 return (DDI_FAILURE); 4982 4983 zfs_dip = dip; 4984 4985 ddi_report_dev(dip); 4986 4987 return (DDI_SUCCESS); 4988 } 4989 4990 static int 4991 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 4992 { 4993 if (spa_busy() || zfs_busy() || zvol_busy()) 4994 return (DDI_FAILURE); 4995 4996 if (cmd != DDI_DETACH) 4997 return (DDI_FAILURE); 4998 4999 zfs_dip = NULL; 5000 5001 ddi_prop_remove_all(dip); 5002 ddi_remove_minor_node(dip, NULL); 5003 5004 return (DDI_SUCCESS); 5005 } 5006 5007 /*ARGSUSED*/ 5008 static int 5009 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 5010 { 5011 switch (infocmd) { 5012 case DDI_INFO_DEVT2DEVINFO: 5013 *result = zfs_dip; 5014 return (DDI_SUCCESS); 5015 5016 case DDI_INFO_DEVT2INSTANCE: 5017 *result = (void *)0; 5018 return (DDI_SUCCESS); 5019 } 5020 5021 return (DDI_FAILURE); 5022 } 5023 5024 /* 5025 * OK, so this is a little weird. 5026 * 5027 * /dev/zfs is the control node, i.e. minor 0. 5028 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 5029 * 5030 * /dev/zfs has basically nothing to do except serve up ioctls, 5031 * so most of the standard driver entry points are in zvol.c. 5032 */ 5033 static struct cb_ops zfs_cb_ops = { 5034 zfsdev_open, /* open */ 5035 zfsdev_close, /* close */ 5036 zvol_strategy, /* strategy */ 5037 nodev, /* print */ 5038 zvol_dump, /* dump */ 5039 zvol_read, /* read */ 5040 zvol_write, /* write */ 5041 zfsdev_ioctl, /* ioctl */ 5042 nodev, /* devmap */ 5043 nodev, /* mmap */ 5044 nodev, /* segmap */ 5045 nochpoll, /* poll */ 5046 ddi_prop_op, /* prop_op */ 5047 NULL, /* streamtab */ 5048 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 5049 CB_REV, /* version */ 5050 nodev, /* async read */ 5051 nodev, /* async write */ 5052 }; 5053 5054 static struct dev_ops zfs_dev_ops = { 5055 DEVO_REV, /* version */ 5056 0, /* refcnt */ 5057 zfs_info, /* info */ 5058 nulldev, /* identify */ 5059 nulldev, /* probe */ 5060 zfs_attach, /* attach */ 5061 zfs_detach, /* detach */ 5062 nodev, /* reset */ 5063 &zfs_cb_ops, /* driver operations */ 5064 NULL, /* no bus operations */ 5065 NULL, /* power */ 5066 ddi_quiesce_not_needed, /* quiesce */ 5067 }; 5068 5069 static struct modldrv zfs_modldrv = { 5070 &mod_driverops, 5071 "ZFS storage pool", 5072 &zfs_dev_ops 5073 }; 5074 5075 static struct modlinkage modlinkage = { 5076 MODREV_1, 5077 (void *)&zfs_modlfs, 5078 (void *)&zfs_modldrv, 5079 NULL 5080 }; 5081 5082 5083 uint_t zfs_fsyncer_key; 5084 extern uint_t rrw_tsd_key; 5085 5086 int 5087 _init(void) 5088 { 5089 int error; 5090 5091 spa_init(FREAD | FWRITE); 5092 zfs_init(); 5093 zvol_init(); 5094 5095 if ((error = mod_install(&modlinkage)) != 0) { 5096 zvol_fini(); 5097 zfs_fini(); 5098 spa_fini(); 5099 return (error); 5100 } 5101 5102 tsd_create(&zfs_fsyncer_key, NULL); 5103 tsd_create(&rrw_tsd_key, NULL); 5104 5105 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 5106 ASSERT(error == 0); 5107 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 5108 5109 return (0); 5110 } 5111 5112 int 5113 _fini(void) 5114 { 5115 int error; 5116 5117 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 5118 return (EBUSY); 5119 5120 if ((error = mod_remove(&modlinkage)) != 0) 5121 return (error); 5122 5123 zvol_fini(); 5124 zfs_fini(); 5125 spa_fini(); 5126 if (zfs_nfsshare_inited) 5127 (void) ddi_modclose(nfs_mod); 5128 if (zfs_smbshare_inited) 5129 (void) ddi_modclose(smbsrv_mod); 5130 if (zfs_nfsshare_inited || zfs_smbshare_inited) 5131 (void) ddi_modclose(sharefs_mod); 5132 5133 tsd_destroy(&zfs_fsyncer_key); 5134 ldi_ident_release(zfs_li); 5135 zfs_li = NULL; 5136 mutex_destroy(&zfs_share_lock); 5137 5138 return (error); 5139 } 5140 5141 int 5142 _info(struct modinfo *modinfop) 5143 { 5144 return (mod_info(&modlinkage, modinfop)); 5145 } 5146