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 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25 * Copyright (c) 2012 by Delphix. All rights reserved. 26 * Copyright (c) 2012, Joyent, Inc. All rights reserved. 27 */ 28 29 #include <sys/types.h> 30 #include <sys/param.h> 31 #include <sys/errno.h> 32 #include <sys/uio.h> 33 #include <sys/buf.h> 34 #include <sys/modctl.h> 35 #include <sys/open.h> 36 #include <sys/file.h> 37 #include <sys/kmem.h> 38 #include <sys/conf.h> 39 #include <sys/cmn_err.h> 40 #include <sys/stat.h> 41 #include <sys/zfs_ioctl.h> 42 #include <sys/zfs_vfsops.h> 43 #include <sys/zfs_znode.h> 44 #include <sys/zap.h> 45 #include <sys/spa.h> 46 #include <sys/spa_impl.h> 47 #include <sys/vdev.h> 48 #include <sys/priv_impl.h> 49 #include <sys/dmu.h> 50 #include <sys/dsl_dir.h> 51 #include <sys/dsl_dataset.h> 52 #include <sys/dsl_prop.h> 53 #include <sys/dsl_deleg.h> 54 #include <sys/dmu_objset.h> 55 #include <sys/dmu_impl.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 /* 356 * If name ends in a '@', then require recursive permissions. 357 */ 358 int 359 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) 360 { 361 int error; 362 boolean_t descendent = B_FALSE; 363 dsl_dataset_t *ds; 364 char *at; 365 366 at = strchr(name, '@'); 367 if (at != NULL && at[1] == '\0') { 368 *at = '\0'; 369 descendent = B_TRUE; 370 } 371 372 error = dsl_dataset_hold(name, FTAG, &ds); 373 if (at != NULL) 374 *at = '@'; 375 if (error != 0) 376 return (error); 377 378 error = zfs_dozonecheck_ds(name, ds, cr); 379 if (error == 0) { 380 error = secpolicy_zfs(cr); 381 if (error) 382 error = dsl_deleg_access_impl(ds, descendent, perm, cr); 383 } 384 385 dsl_dataset_rele(ds, FTAG); 386 return (error); 387 } 388 389 int 390 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds, 391 const char *perm, cred_t *cr) 392 { 393 int error; 394 395 error = zfs_dozonecheck_ds(name, ds, cr); 396 if (error == 0) { 397 error = secpolicy_zfs(cr); 398 if (error) 399 error = dsl_deleg_access_impl(ds, B_FALSE, perm, cr); 400 } 401 return (error); 402 } 403 404 /* 405 * Policy for setting the security label property. 406 * 407 * Returns 0 for success, non-zero for access and other errors. 408 */ 409 static int 410 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr) 411 { 412 char ds_hexsl[MAXNAMELEN]; 413 bslabel_t ds_sl, new_sl; 414 boolean_t new_default = FALSE; 415 uint64_t zoned; 416 int needed_priv = -1; 417 int error; 418 419 /* First get the existing dataset label. */ 420 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 421 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 422 if (error) 423 return (EPERM); 424 425 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 426 new_default = TRUE; 427 428 /* The label must be translatable */ 429 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0)) 430 return (EINVAL); 431 432 /* 433 * In a non-global zone, disallow attempts to set a label that 434 * doesn't match that of the zone; otherwise no other checks 435 * are needed. 436 */ 437 if (!INGLOBALZONE(curproc)) { 438 if (new_default || !blequal(&new_sl, CR_SL(CRED()))) 439 return (EPERM); 440 return (0); 441 } 442 443 /* 444 * For global-zone datasets (i.e., those whose zoned property is 445 * "off", verify that the specified new label is valid for the 446 * global zone. 447 */ 448 if (dsl_prop_get_integer(name, 449 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 450 return (EPERM); 451 if (!zoned) { 452 if (zfs_check_global_label(name, strval) != 0) 453 return (EPERM); 454 } 455 456 /* 457 * If the existing dataset label is nondefault, check if the 458 * dataset is mounted (label cannot be changed while mounted). 459 * Get the zfsvfs; if there isn't one, then the dataset isn't 460 * mounted (or isn't a dataset, doesn't exist, ...). 461 */ 462 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) { 463 objset_t *os; 464 static char *setsl_tag = "setsl_tag"; 465 466 /* 467 * Try to own the dataset; abort if there is any error, 468 * (e.g., already mounted, in use, or other error). 469 */ 470 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE, 471 setsl_tag, &os); 472 if (error) 473 return (EPERM); 474 475 dmu_objset_disown(os, setsl_tag); 476 477 if (new_default) { 478 needed_priv = PRIV_FILE_DOWNGRADE_SL; 479 goto out_check; 480 } 481 482 if (hexstr_to_label(strval, &new_sl) != 0) 483 return (EPERM); 484 485 if (blstrictdom(&ds_sl, &new_sl)) 486 needed_priv = PRIV_FILE_DOWNGRADE_SL; 487 else if (blstrictdom(&new_sl, &ds_sl)) 488 needed_priv = PRIV_FILE_UPGRADE_SL; 489 } else { 490 /* dataset currently has a default label */ 491 if (!new_default) 492 needed_priv = PRIV_FILE_UPGRADE_SL; 493 } 494 495 out_check: 496 if (needed_priv != -1) 497 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL)); 498 return (0); 499 } 500 501 static int 502 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval, 503 cred_t *cr) 504 { 505 char *strval; 506 507 /* 508 * Check permissions for special properties. 509 */ 510 switch (prop) { 511 case ZFS_PROP_ZONED: 512 /* 513 * Disallow setting of 'zoned' from within a local zone. 514 */ 515 if (!INGLOBALZONE(curproc)) 516 return (EPERM); 517 break; 518 519 case ZFS_PROP_QUOTA: 520 if (!INGLOBALZONE(curproc)) { 521 uint64_t zoned; 522 char setpoint[MAXNAMELEN]; 523 /* 524 * Unprivileged users are allowed to modify the 525 * quota on things *under* (ie. contained by) 526 * the thing they own. 527 */ 528 if (dsl_prop_get_integer(dsname, "zoned", &zoned, 529 setpoint)) 530 return (EPERM); 531 if (!zoned || strlen(dsname) <= strlen(setpoint)) 532 return (EPERM); 533 } 534 break; 535 536 case ZFS_PROP_MLSLABEL: 537 if (!is_system_labeled()) 538 return (EPERM); 539 540 if (nvpair_value_string(propval, &strval) == 0) { 541 int err; 542 543 err = zfs_set_slabel_policy(dsname, strval, CRED()); 544 if (err != 0) 545 return (err); 546 } 547 break; 548 } 549 550 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr)); 551 } 552 553 int 554 zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr) 555 { 556 int error; 557 558 error = zfs_dozonecheck(zc->zc_name, cr); 559 if (error) 560 return (error); 561 562 /* 563 * permission to set permissions will be evaluated later in 564 * dsl_deleg_can_allow() 565 */ 566 return (0); 567 } 568 569 int 570 zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr) 571 { 572 return (zfs_secpolicy_write_perms(zc->zc_name, 573 ZFS_DELEG_PERM_ROLLBACK, cr)); 574 } 575 576 int 577 zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr) 578 { 579 spa_t *spa; 580 dsl_pool_t *dp; 581 dsl_dataset_t *ds; 582 char *cp; 583 int error; 584 585 /* 586 * Generate the current snapshot name from the given objsetid, then 587 * use that name for the secpolicy/zone checks. 588 */ 589 cp = strchr(zc->zc_name, '@'); 590 if (cp == NULL) 591 return (EINVAL); 592 error = spa_open(zc->zc_name, &spa, FTAG); 593 if (error) 594 return (error); 595 596 dp = spa_get_dsl(spa); 597 rw_enter(&dp->dp_config_rwlock, RW_READER); 598 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 599 rw_exit(&dp->dp_config_rwlock); 600 spa_close(spa, FTAG); 601 if (error) 602 return (error); 603 604 dsl_dataset_name(ds, zc->zc_name); 605 606 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds, 607 ZFS_DELEG_PERM_SEND, cr); 608 dsl_dataset_rele(ds, FTAG); 609 610 return (error); 611 } 612 613 static int 614 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, cred_t *cr) 615 { 616 vnode_t *vp; 617 int error; 618 619 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 620 NO_FOLLOW, NULL, &vp)) != 0) 621 return (error); 622 623 /* Now make sure mntpnt and dataset are ZFS */ 624 625 if (vp->v_vfsp->vfs_fstype != zfsfstype || 626 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 627 zc->zc_name) != 0)) { 628 VN_RELE(vp); 629 return (EPERM); 630 } 631 632 VN_RELE(vp); 633 return (dsl_deleg_access(zc->zc_name, 634 ZFS_DELEG_PERM_SHARE, cr)); 635 } 636 637 int 638 zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr) 639 { 640 if (!INGLOBALZONE(curproc)) 641 return (EPERM); 642 643 if (secpolicy_nfs(cr) == 0) { 644 return (0); 645 } else { 646 return (zfs_secpolicy_deleg_share(zc, cr)); 647 } 648 } 649 650 int 651 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, cred_t *cr) 652 { 653 if (!INGLOBALZONE(curproc)) 654 return (EPERM); 655 656 if (secpolicy_smb(cr) == 0) { 657 return (0); 658 } else { 659 return (zfs_secpolicy_deleg_share(zc, cr)); 660 } 661 } 662 663 static int 664 zfs_get_parent(const char *datasetname, char *parent, int parentsize) 665 { 666 char *cp; 667 668 /* 669 * Remove the @bla or /bla from the end of the name to get the parent. 670 */ 671 (void) strncpy(parent, datasetname, parentsize); 672 cp = strrchr(parent, '@'); 673 if (cp != NULL) { 674 cp[0] = '\0'; 675 } else { 676 cp = strrchr(parent, '/'); 677 if (cp == NULL) 678 return (ENOENT); 679 cp[0] = '\0'; 680 } 681 682 return (0); 683 } 684 685 int 686 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 687 { 688 int error; 689 690 if ((error = zfs_secpolicy_write_perms(name, 691 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 692 return (error); 693 694 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); 695 } 696 697 static int 698 zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr) 699 { 700 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); 701 } 702 703 /* 704 * Destroying snapshots with delegated permissions requires 705 * descendent mount and destroy permissions. 706 */ 707 static int 708 zfs_secpolicy_destroy_recursive(zfs_cmd_t *zc, cred_t *cr) 709 { 710 int error; 711 char *dsname; 712 713 dsname = kmem_asprintf("%s@", zc->zc_name); 714 715 error = zfs_secpolicy_destroy_perms(dsname, cr); 716 717 strfree(dsname); 718 return (error); 719 } 720 721 int 722 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 723 { 724 char parentname[MAXNAMELEN]; 725 int error; 726 727 if ((error = zfs_secpolicy_write_perms(from, 728 ZFS_DELEG_PERM_RENAME, cr)) != 0) 729 return (error); 730 731 if ((error = zfs_secpolicy_write_perms(from, 732 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 733 return (error); 734 735 if ((error = zfs_get_parent(to, parentname, 736 sizeof (parentname))) != 0) 737 return (error); 738 739 if ((error = zfs_secpolicy_write_perms(parentname, 740 ZFS_DELEG_PERM_CREATE, cr)) != 0) 741 return (error); 742 743 if ((error = zfs_secpolicy_write_perms(parentname, 744 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 745 return (error); 746 747 return (error); 748 } 749 750 static int 751 zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr) 752 { 753 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); 754 } 755 756 static int 757 zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr) 758 { 759 char parentname[MAXNAMELEN]; 760 objset_t *clone; 761 int error; 762 763 error = zfs_secpolicy_write_perms(zc->zc_name, 764 ZFS_DELEG_PERM_PROMOTE, cr); 765 if (error) 766 return (error); 767 768 error = dmu_objset_hold(zc->zc_name, FTAG, &clone); 769 770 if (error == 0) { 771 dsl_dataset_t *pclone = NULL; 772 dsl_dir_t *dd; 773 dd = clone->os_dsl_dataset->ds_dir; 774 775 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); 776 error = dsl_dataset_hold_obj(dd->dd_pool, 777 dd->dd_phys->dd_origin_obj, FTAG, &pclone); 778 rw_exit(&dd->dd_pool->dp_config_rwlock); 779 if (error) { 780 dmu_objset_rele(clone, FTAG); 781 return (error); 782 } 783 784 error = zfs_secpolicy_write_perms(zc->zc_name, 785 ZFS_DELEG_PERM_MOUNT, cr); 786 787 dsl_dataset_name(pclone, parentname); 788 dmu_objset_rele(clone, FTAG); 789 dsl_dataset_rele(pclone, FTAG); 790 if (error == 0) 791 error = zfs_secpolicy_write_perms(parentname, 792 ZFS_DELEG_PERM_PROMOTE, cr); 793 } 794 return (error); 795 } 796 797 static int 798 zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr) 799 { 800 int error; 801 802 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 803 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 804 return (error); 805 806 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 807 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 808 return (error); 809 810 return (zfs_secpolicy_write_perms(zc->zc_name, 811 ZFS_DELEG_PERM_CREATE, cr)); 812 } 813 814 int 815 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 816 { 817 return (zfs_secpolicy_write_perms(name, 818 ZFS_DELEG_PERM_SNAPSHOT, cr)); 819 } 820 821 static int 822 zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr) 823 { 824 825 return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr)); 826 } 827 828 static int 829 zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr) 830 { 831 char parentname[MAXNAMELEN]; 832 int error; 833 834 if ((error = zfs_get_parent(zc->zc_name, parentname, 835 sizeof (parentname))) != 0) 836 return (error); 837 838 if (zc->zc_value[0] != '\0') { 839 if ((error = zfs_secpolicy_write_perms(zc->zc_value, 840 ZFS_DELEG_PERM_CLONE, cr)) != 0) 841 return (error); 842 } 843 844 if ((error = zfs_secpolicy_write_perms(parentname, 845 ZFS_DELEG_PERM_CREATE, cr)) != 0) 846 return (error); 847 848 error = zfs_secpolicy_write_perms(parentname, 849 ZFS_DELEG_PERM_MOUNT, cr); 850 851 return (error); 852 } 853 854 static int 855 zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr) 856 { 857 int error; 858 859 error = secpolicy_fs_unmount(cr, NULL); 860 if (error) { 861 error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr); 862 } 863 return (error); 864 } 865 866 /* 867 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 868 * SYS_CONFIG privilege, which is not available in a local zone. 869 */ 870 /* ARGSUSED */ 871 static int 872 zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr) 873 { 874 if (secpolicy_sys_config(cr, B_FALSE) != 0) 875 return (EPERM); 876 877 return (0); 878 } 879 880 /* 881 * Policy for object to name lookups. 882 */ 883 /* ARGSUSED */ 884 static int 885 zfs_secpolicy_diff(zfs_cmd_t *zc, cred_t *cr) 886 { 887 int error; 888 889 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0) 890 return (0); 891 892 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr); 893 return (error); 894 } 895 896 /* 897 * Policy for fault injection. Requires all privileges. 898 */ 899 /* ARGSUSED */ 900 static int 901 zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr) 902 { 903 return (secpolicy_zinject(cr)); 904 } 905 906 static int 907 zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr) 908 { 909 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 910 911 if (prop == ZPROP_INVAL) { 912 if (!zfs_prop_user(zc->zc_value)) 913 return (EINVAL); 914 return (zfs_secpolicy_write_perms(zc->zc_name, 915 ZFS_DELEG_PERM_USERPROP, cr)); 916 } else { 917 return (zfs_secpolicy_setprop(zc->zc_name, prop, 918 NULL, cr)); 919 } 920 } 921 922 static int 923 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, cred_t *cr) 924 { 925 int err = zfs_secpolicy_read(zc, cr); 926 if (err) 927 return (err); 928 929 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 930 return (EINVAL); 931 932 if (zc->zc_value[0] == 0) { 933 /* 934 * They are asking about a posix uid/gid. If it's 935 * themself, allow it. 936 */ 937 if (zc->zc_objset_type == ZFS_PROP_USERUSED || 938 zc->zc_objset_type == ZFS_PROP_USERQUOTA) { 939 if (zc->zc_guid == crgetuid(cr)) 940 return (0); 941 } else { 942 if (groupmember(zc->zc_guid, cr)) 943 return (0); 944 } 945 } 946 947 return (zfs_secpolicy_write_perms(zc->zc_name, 948 userquota_perms[zc->zc_objset_type], cr)); 949 } 950 951 static int 952 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, cred_t *cr) 953 { 954 int err = zfs_secpolicy_read(zc, cr); 955 if (err) 956 return (err); 957 958 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 959 return (EINVAL); 960 961 return (zfs_secpolicy_write_perms(zc->zc_name, 962 userquota_perms[zc->zc_objset_type], cr)); 963 } 964 965 static int 966 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, cred_t *cr) 967 { 968 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, 969 NULL, cr)); 970 } 971 972 static int 973 zfs_secpolicy_hold(zfs_cmd_t *zc, cred_t *cr) 974 { 975 return (zfs_secpolicy_write_perms(zc->zc_name, 976 ZFS_DELEG_PERM_HOLD, cr)); 977 } 978 979 static int 980 zfs_secpolicy_release(zfs_cmd_t *zc, cred_t *cr) 981 { 982 return (zfs_secpolicy_write_perms(zc->zc_name, 983 ZFS_DELEG_PERM_RELEASE, cr)); 984 } 985 986 /* 987 * Policy for allowing temporary snapshots to be taken or released 988 */ 989 static int 990 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, cred_t *cr) 991 { 992 /* 993 * A temporary snapshot is the same as a snapshot, 994 * hold, destroy and release all rolled into one. 995 * Delegated diff alone is sufficient that we allow this. 996 */ 997 int error; 998 999 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 1000 ZFS_DELEG_PERM_DIFF, cr)) == 0) 1001 return (0); 1002 1003 error = zfs_secpolicy_snapshot(zc, cr); 1004 if (!error) 1005 error = zfs_secpolicy_hold(zc, cr); 1006 if (!error) 1007 error = zfs_secpolicy_release(zc, cr); 1008 if (!error) 1009 error = zfs_secpolicy_destroy(zc, cr); 1010 return (error); 1011 } 1012 1013 /* 1014 * Returns the nvlist as specified by the user in the zfs_cmd_t. 1015 */ 1016 static int 1017 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) 1018 { 1019 char *packed; 1020 int error; 1021 nvlist_t *list = NULL; 1022 1023 /* 1024 * Read in and unpack the user-supplied nvlist. 1025 */ 1026 if (size == 0) 1027 return (EINVAL); 1028 1029 packed = kmem_alloc(size, KM_SLEEP); 1030 1031 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, 1032 iflag)) != 0) { 1033 kmem_free(packed, size); 1034 return (error); 1035 } 1036 1037 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 1038 kmem_free(packed, size); 1039 return (error); 1040 } 1041 1042 kmem_free(packed, size); 1043 1044 *nvp = list; 1045 return (0); 1046 } 1047 1048 static int 1049 fit_error_list(zfs_cmd_t *zc, nvlist_t **errors) 1050 { 1051 size_t size; 1052 1053 VERIFY(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0); 1054 1055 if (size > zc->zc_nvlist_dst_size) { 1056 nvpair_t *more_errors; 1057 int n = 0; 1058 1059 if (zc->zc_nvlist_dst_size < 1024) 1060 return (ENOMEM); 1061 1062 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, 0) == 0); 1063 more_errors = nvlist_prev_nvpair(*errors, NULL); 1064 1065 do { 1066 nvpair_t *pair = nvlist_prev_nvpair(*errors, 1067 more_errors); 1068 VERIFY(nvlist_remove_nvpair(*errors, pair) == 0); 1069 n++; 1070 VERIFY(nvlist_size(*errors, &size, 1071 NV_ENCODE_NATIVE) == 0); 1072 } while (size > zc->zc_nvlist_dst_size); 1073 1074 VERIFY(nvlist_remove_nvpair(*errors, more_errors) == 0); 1075 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, n) == 0); 1076 ASSERT(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0); 1077 ASSERT(size <= zc->zc_nvlist_dst_size); 1078 } 1079 1080 return (0); 1081 } 1082 1083 static int 1084 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 1085 { 1086 char *packed = NULL; 1087 int error = 0; 1088 size_t size; 1089 1090 VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0); 1091 1092 if (size > zc->zc_nvlist_dst_size) { 1093 error = ENOMEM; 1094 } else { 1095 packed = kmem_alloc(size, KM_SLEEP); 1096 VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE, 1097 KM_SLEEP) == 0); 1098 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 1099 size, zc->zc_iflags) != 0) 1100 error = EFAULT; 1101 kmem_free(packed, size); 1102 } 1103 1104 zc->zc_nvlist_dst_size = size; 1105 return (error); 1106 } 1107 1108 static int 1109 getzfsvfs(const char *dsname, zfsvfs_t **zfvp) 1110 { 1111 objset_t *os; 1112 int error; 1113 1114 error = dmu_objset_hold(dsname, FTAG, &os); 1115 if (error) 1116 return (error); 1117 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1118 dmu_objset_rele(os, FTAG); 1119 return (EINVAL); 1120 } 1121 1122 mutex_enter(&os->os_user_ptr_lock); 1123 *zfvp = dmu_objset_get_user(os); 1124 if (*zfvp) { 1125 VFS_HOLD((*zfvp)->z_vfs); 1126 } else { 1127 error = ESRCH; 1128 } 1129 mutex_exit(&os->os_user_ptr_lock); 1130 dmu_objset_rele(os, FTAG); 1131 return (error); 1132 } 1133 1134 /* 1135 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which 1136 * case its z_vfs will be NULL, and it will be opened as the owner. 1137 */ 1138 static int 1139 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer) 1140 { 1141 int error = 0; 1142 1143 if (getzfsvfs(name, zfvp) != 0) 1144 error = zfsvfs_create(name, zfvp); 1145 if (error == 0) { 1146 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER : 1147 RW_READER, tag); 1148 if ((*zfvp)->z_unmounted) { 1149 /* 1150 * XXX we could probably try again, since the unmounting 1151 * thread should be just about to disassociate the 1152 * objset from the zfsvfs. 1153 */ 1154 rrw_exit(&(*zfvp)->z_teardown_lock, tag); 1155 return (EBUSY); 1156 } 1157 } 1158 return (error); 1159 } 1160 1161 static void 1162 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) 1163 { 1164 rrw_exit(&zfsvfs->z_teardown_lock, tag); 1165 1166 if (zfsvfs->z_vfs) { 1167 VFS_RELE(zfsvfs->z_vfs); 1168 } else { 1169 dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1170 zfsvfs_free(zfsvfs); 1171 } 1172 } 1173 1174 static int 1175 zfs_ioc_pool_create(zfs_cmd_t *zc) 1176 { 1177 int error; 1178 nvlist_t *config, *props = NULL; 1179 nvlist_t *rootprops = NULL; 1180 nvlist_t *zplprops = NULL; 1181 char *buf; 1182 1183 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1184 zc->zc_iflags, &config)) 1185 return (error); 1186 1187 if (zc->zc_nvlist_src_size != 0 && (error = 1188 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1189 zc->zc_iflags, &props))) { 1190 nvlist_free(config); 1191 return (error); 1192 } 1193 1194 if (props) { 1195 nvlist_t *nvl = NULL; 1196 uint64_t version = SPA_VERSION; 1197 1198 (void) nvlist_lookup_uint64(props, 1199 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); 1200 if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) { 1201 error = EINVAL; 1202 goto pool_props_bad; 1203 } 1204 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); 1205 if (nvl) { 1206 error = nvlist_dup(nvl, &rootprops, KM_SLEEP); 1207 if (error != 0) { 1208 nvlist_free(config); 1209 nvlist_free(props); 1210 return (error); 1211 } 1212 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); 1213 } 1214 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1215 error = zfs_fill_zplprops_root(version, rootprops, 1216 zplprops, NULL); 1217 if (error) 1218 goto pool_props_bad; 1219 } 1220 1221 buf = history_str_get(zc); 1222 1223 error = spa_create(zc->zc_name, config, props, buf, zplprops); 1224 1225 /* 1226 * Set the remaining root properties 1227 */ 1228 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, 1229 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) 1230 (void) spa_destroy(zc->zc_name); 1231 1232 if (buf != NULL) 1233 history_str_free(buf); 1234 1235 pool_props_bad: 1236 nvlist_free(rootprops); 1237 nvlist_free(zplprops); 1238 nvlist_free(config); 1239 nvlist_free(props); 1240 1241 return (error); 1242 } 1243 1244 static int 1245 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 1246 { 1247 int error; 1248 zfs_log_history(zc); 1249 error = spa_destroy(zc->zc_name); 1250 if (error == 0) 1251 zvol_remove_minors(zc->zc_name); 1252 return (error); 1253 } 1254 1255 static int 1256 zfs_ioc_pool_import(zfs_cmd_t *zc) 1257 { 1258 nvlist_t *config, *props = NULL; 1259 uint64_t guid; 1260 int error; 1261 1262 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1263 zc->zc_iflags, &config)) != 0) 1264 return (error); 1265 1266 if (zc->zc_nvlist_src_size != 0 && (error = 1267 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1268 zc->zc_iflags, &props))) { 1269 nvlist_free(config); 1270 return (error); 1271 } 1272 1273 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1274 guid != zc->zc_guid) 1275 error = EINVAL; 1276 else 1277 error = spa_import(zc->zc_name, config, props, zc->zc_cookie); 1278 1279 if (zc->zc_nvlist_dst != 0) { 1280 int err; 1281 1282 if ((err = put_nvlist(zc, config)) != 0) 1283 error = err; 1284 } 1285 1286 nvlist_free(config); 1287 1288 if (props) 1289 nvlist_free(props); 1290 1291 return (error); 1292 } 1293 1294 static int 1295 zfs_ioc_pool_export(zfs_cmd_t *zc) 1296 { 1297 int error; 1298 boolean_t force = (boolean_t)zc->zc_cookie; 1299 boolean_t hardforce = (boolean_t)zc->zc_guid; 1300 1301 zfs_log_history(zc); 1302 error = spa_export(zc->zc_name, NULL, force, hardforce); 1303 if (error == 0) 1304 zvol_remove_minors(zc->zc_name); 1305 return (error); 1306 } 1307 1308 static int 1309 zfs_ioc_pool_configs(zfs_cmd_t *zc) 1310 { 1311 nvlist_t *configs; 1312 int error; 1313 1314 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 1315 return (EEXIST); 1316 1317 error = put_nvlist(zc, configs); 1318 1319 nvlist_free(configs); 1320 1321 return (error); 1322 } 1323 1324 static int 1325 zfs_ioc_pool_stats(zfs_cmd_t *zc) 1326 { 1327 nvlist_t *config; 1328 int error; 1329 int ret = 0; 1330 1331 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 1332 sizeof (zc->zc_value)); 1333 1334 if (config != NULL) { 1335 ret = put_nvlist(zc, config); 1336 nvlist_free(config); 1337 1338 /* 1339 * The config may be present even if 'error' is non-zero. 1340 * In this case we return success, and preserve the real errno 1341 * in 'zc_cookie'. 1342 */ 1343 zc->zc_cookie = error; 1344 } else { 1345 ret = error; 1346 } 1347 1348 return (ret); 1349 } 1350 1351 /* 1352 * Try to import the given pool, returning pool stats as appropriate so that 1353 * user land knows which devices are available and overall pool health. 1354 */ 1355 static int 1356 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 1357 { 1358 nvlist_t *tryconfig, *config; 1359 int error; 1360 1361 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1362 zc->zc_iflags, &tryconfig)) != 0) 1363 return (error); 1364 1365 config = spa_tryimport(tryconfig); 1366 1367 nvlist_free(tryconfig); 1368 1369 if (config == NULL) 1370 return (EINVAL); 1371 1372 error = put_nvlist(zc, config); 1373 nvlist_free(config); 1374 1375 return (error); 1376 } 1377 1378 /* 1379 * inputs: 1380 * zc_name name of the pool 1381 * zc_cookie scan func (pool_scan_func_t) 1382 */ 1383 static int 1384 zfs_ioc_pool_scan(zfs_cmd_t *zc) 1385 { 1386 spa_t *spa; 1387 int error; 1388 1389 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1390 return (error); 1391 1392 if (zc->zc_cookie == POOL_SCAN_NONE) 1393 error = spa_scan_stop(spa); 1394 else 1395 error = spa_scan(spa, zc->zc_cookie); 1396 1397 spa_close(spa, FTAG); 1398 1399 return (error); 1400 } 1401 1402 static int 1403 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 1404 { 1405 spa_t *spa; 1406 int error; 1407 1408 error = spa_open(zc->zc_name, &spa, FTAG); 1409 if (error == 0) { 1410 spa_freeze(spa); 1411 spa_close(spa, FTAG); 1412 } 1413 return (error); 1414 } 1415 1416 static int 1417 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 1418 { 1419 spa_t *spa; 1420 int error; 1421 1422 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1423 return (error); 1424 1425 if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) { 1426 spa_close(spa, FTAG); 1427 return (EINVAL); 1428 } 1429 1430 spa_upgrade(spa, zc->zc_cookie); 1431 spa_close(spa, FTAG); 1432 1433 return (error); 1434 } 1435 1436 static int 1437 zfs_ioc_pool_get_history(zfs_cmd_t *zc) 1438 { 1439 spa_t *spa; 1440 char *hist_buf; 1441 uint64_t size; 1442 int error; 1443 1444 if ((size = zc->zc_history_len) == 0) 1445 return (EINVAL); 1446 1447 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1448 return (error); 1449 1450 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 1451 spa_close(spa, FTAG); 1452 return (ENOTSUP); 1453 } 1454 1455 hist_buf = kmem_alloc(size, KM_SLEEP); 1456 if ((error = spa_history_get(spa, &zc->zc_history_offset, 1457 &zc->zc_history_len, hist_buf)) == 0) { 1458 error = ddi_copyout(hist_buf, 1459 (void *)(uintptr_t)zc->zc_history, 1460 zc->zc_history_len, zc->zc_iflags); 1461 } 1462 1463 spa_close(spa, FTAG); 1464 kmem_free(hist_buf, size); 1465 return (error); 1466 } 1467 1468 static int 1469 zfs_ioc_pool_reguid(zfs_cmd_t *zc) 1470 { 1471 spa_t *spa; 1472 int error; 1473 1474 error = spa_open(zc->zc_name, &spa, FTAG); 1475 if (error == 0) { 1476 error = spa_change_guid(spa); 1477 spa_close(spa, FTAG); 1478 } 1479 return (error); 1480 } 1481 1482 static int 1483 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 1484 { 1485 int error; 1486 1487 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)) 1488 return (error); 1489 1490 return (0); 1491 } 1492 1493 /* 1494 * inputs: 1495 * zc_name name of filesystem 1496 * zc_obj object to find 1497 * 1498 * outputs: 1499 * zc_value name of object 1500 */ 1501 static int 1502 zfs_ioc_obj_to_path(zfs_cmd_t *zc) 1503 { 1504 objset_t *os; 1505 int error; 1506 1507 /* XXX reading from objset not owned */ 1508 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1509 return (error); 1510 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1511 dmu_objset_rele(os, FTAG); 1512 return (EINVAL); 1513 } 1514 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, 1515 sizeof (zc->zc_value)); 1516 dmu_objset_rele(os, FTAG); 1517 1518 return (error); 1519 } 1520 1521 /* 1522 * inputs: 1523 * zc_name name of filesystem 1524 * zc_obj object to find 1525 * 1526 * outputs: 1527 * zc_stat stats on object 1528 * zc_value path to object 1529 */ 1530 static int 1531 zfs_ioc_obj_to_stats(zfs_cmd_t *zc) 1532 { 1533 objset_t *os; 1534 int error; 1535 1536 /* XXX reading from objset not owned */ 1537 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1538 return (error); 1539 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1540 dmu_objset_rele(os, FTAG); 1541 return (EINVAL); 1542 } 1543 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value, 1544 sizeof (zc->zc_value)); 1545 dmu_objset_rele(os, FTAG); 1546 1547 return (error); 1548 } 1549 1550 static int 1551 zfs_ioc_vdev_add(zfs_cmd_t *zc) 1552 { 1553 spa_t *spa; 1554 int error; 1555 nvlist_t *config, **l2cache, **spares; 1556 uint_t nl2cache = 0, nspares = 0; 1557 1558 error = spa_open(zc->zc_name, &spa, FTAG); 1559 if (error != 0) 1560 return (error); 1561 1562 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1563 zc->zc_iflags, &config); 1564 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, 1565 &l2cache, &nl2cache); 1566 1567 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, 1568 &spares, &nspares); 1569 1570 /* 1571 * A root pool with concatenated devices is not supported. 1572 * Thus, can not add a device to a root pool. 1573 * 1574 * Intent log device can not be added to a rootpool because 1575 * during mountroot, zil is replayed, a seperated log device 1576 * can not be accessed during the mountroot time. 1577 * 1578 * l2cache and spare devices are ok to be added to a rootpool. 1579 */ 1580 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { 1581 nvlist_free(config); 1582 spa_close(spa, FTAG); 1583 return (EDOM); 1584 } 1585 1586 if (error == 0) { 1587 error = spa_vdev_add(spa, config); 1588 nvlist_free(config); 1589 } 1590 spa_close(spa, FTAG); 1591 return (error); 1592 } 1593 1594 /* 1595 * inputs: 1596 * zc_name name of the pool 1597 * zc_nvlist_conf nvlist of devices to remove 1598 * zc_cookie to stop the remove? 1599 */ 1600 static int 1601 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 1602 { 1603 spa_t *spa; 1604 int error; 1605 1606 error = spa_open(zc->zc_name, &spa, FTAG); 1607 if (error != 0) 1608 return (error); 1609 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 1610 spa_close(spa, FTAG); 1611 return (error); 1612 } 1613 1614 static int 1615 zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 1616 { 1617 spa_t *spa; 1618 int error; 1619 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 1620 1621 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1622 return (error); 1623 switch (zc->zc_cookie) { 1624 case VDEV_STATE_ONLINE: 1625 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 1626 break; 1627 1628 case VDEV_STATE_OFFLINE: 1629 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 1630 break; 1631 1632 case VDEV_STATE_FAULTED: 1633 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1634 zc->zc_obj != VDEV_AUX_EXTERNAL) 1635 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1636 1637 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); 1638 break; 1639 1640 case VDEV_STATE_DEGRADED: 1641 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1642 zc->zc_obj != VDEV_AUX_EXTERNAL) 1643 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1644 1645 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj); 1646 break; 1647 1648 default: 1649 error = EINVAL; 1650 } 1651 zc->zc_cookie = newstate; 1652 spa_close(spa, FTAG); 1653 return (error); 1654 } 1655 1656 static int 1657 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1658 { 1659 spa_t *spa; 1660 int replacing = zc->zc_cookie; 1661 nvlist_t *config; 1662 int error; 1663 1664 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1665 return (error); 1666 1667 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1668 zc->zc_iflags, &config)) == 0) { 1669 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 1670 nvlist_free(config); 1671 } 1672 1673 spa_close(spa, FTAG); 1674 return (error); 1675 } 1676 1677 static int 1678 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 1679 { 1680 spa_t *spa; 1681 int error; 1682 1683 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1684 return (error); 1685 1686 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); 1687 1688 spa_close(spa, FTAG); 1689 return (error); 1690 } 1691 1692 static int 1693 zfs_ioc_vdev_split(zfs_cmd_t *zc) 1694 { 1695 spa_t *spa; 1696 nvlist_t *config, *props = NULL; 1697 int error; 1698 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT); 1699 1700 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1701 return (error); 1702 1703 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1704 zc->zc_iflags, &config)) { 1705 spa_close(spa, FTAG); 1706 return (error); 1707 } 1708 1709 if (zc->zc_nvlist_src_size != 0 && (error = 1710 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1711 zc->zc_iflags, &props))) { 1712 spa_close(spa, FTAG); 1713 nvlist_free(config); 1714 return (error); 1715 } 1716 1717 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp); 1718 1719 spa_close(spa, FTAG); 1720 1721 nvlist_free(config); 1722 nvlist_free(props); 1723 1724 return (error); 1725 } 1726 1727 static int 1728 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 1729 { 1730 spa_t *spa; 1731 char *path = zc->zc_value; 1732 uint64_t guid = zc->zc_guid; 1733 int error; 1734 1735 error = spa_open(zc->zc_name, &spa, FTAG); 1736 if (error != 0) 1737 return (error); 1738 1739 error = spa_vdev_setpath(spa, guid, path); 1740 spa_close(spa, FTAG); 1741 return (error); 1742 } 1743 1744 static int 1745 zfs_ioc_vdev_setfru(zfs_cmd_t *zc) 1746 { 1747 spa_t *spa; 1748 char *fru = zc->zc_value; 1749 uint64_t guid = zc->zc_guid; 1750 int error; 1751 1752 error = spa_open(zc->zc_name, &spa, FTAG); 1753 if (error != 0) 1754 return (error); 1755 1756 error = spa_vdev_setfru(spa, guid, fru); 1757 spa_close(spa, FTAG); 1758 return (error); 1759 } 1760 1761 static int 1762 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os) 1763 { 1764 int error = 0; 1765 nvlist_t *nv; 1766 1767 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1768 1769 if (zc->zc_nvlist_dst != 0 && 1770 (error = dsl_prop_get_all(os, &nv)) == 0) { 1771 dmu_objset_stats(os, nv); 1772 /* 1773 * NB: zvol_get_stats() will read the objset contents, 1774 * which we aren't supposed to do with a 1775 * DS_MODE_USER hold, because it could be 1776 * inconsistent. So this is a bit of a workaround... 1777 * XXX reading with out owning 1778 */ 1779 if (!zc->zc_objset_stats.dds_inconsistent && 1780 dmu_objset_type(os) == DMU_OST_ZVOL) { 1781 error = zvol_get_stats(os, nv); 1782 if (error == EIO) 1783 return (error); 1784 VERIFY3S(error, ==, 0); 1785 } 1786 error = put_nvlist(zc, nv); 1787 nvlist_free(nv); 1788 } 1789 1790 return (error); 1791 } 1792 1793 /* 1794 * inputs: 1795 * zc_name name of filesystem 1796 * zc_nvlist_dst_size size of buffer for property nvlist 1797 * 1798 * outputs: 1799 * zc_objset_stats stats 1800 * zc_nvlist_dst property nvlist 1801 * zc_nvlist_dst_size size of property nvlist 1802 */ 1803 static int 1804 zfs_ioc_objset_stats(zfs_cmd_t *zc) 1805 { 1806 objset_t *os = NULL; 1807 int error; 1808 1809 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1810 return (error); 1811 1812 error = zfs_ioc_objset_stats_impl(zc, os); 1813 1814 dmu_objset_rele(os, FTAG); 1815 1816 return (error); 1817 } 1818 1819 /* 1820 * inputs: 1821 * zc_name name of filesystem 1822 * zc_nvlist_dst_size size of buffer for property nvlist 1823 * 1824 * outputs: 1825 * zc_nvlist_dst received property nvlist 1826 * zc_nvlist_dst_size size of received property nvlist 1827 * 1828 * Gets received properties (distinct from local properties on or after 1829 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from 1830 * local property values. 1831 */ 1832 static int 1833 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) 1834 { 1835 objset_t *os = NULL; 1836 int error; 1837 nvlist_t *nv; 1838 1839 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1840 return (error); 1841 1842 /* 1843 * Without this check, we would return local property values if the 1844 * caller has not already received properties on or after 1845 * SPA_VERSION_RECVD_PROPS. 1846 */ 1847 if (!dsl_prop_get_hasrecvd(os)) { 1848 dmu_objset_rele(os, FTAG); 1849 return (ENOTSUP); 1850 } 1851 1852 if (zc->zc_nvlist_dst != 0 && 1853 (error = dsl_prop_get_received(os, &nv)) == 0) { 1854 error = put_nvlist(zc, nv); 1855 nvlist_free(nv); 1856 } 1857 1858 dmu_objset_rele(os, FTAG); 1859 return (error); 1860 } 1861 1862 static int 1863 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) 1864 { 1865 uint64_t value; 1866 int error; 1867 1868 /* 1869 * zfs_get_zplprop() will either find a value or give us 1870 * the default value (if there is one). 1871 */ 1872 if ((error = zfs_get_zplprop(os, prop, &value)) != 0) 1873 return (error); 1874 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); 1875 return (0); 1876 } 1877 1878 /* 1879 * inputs: 1880 * zc_name name of filesystem 1881 * zc_nvlist_dst_size size of buffer for zpl property nvlist 1882 * 1883 * outputs: 1884 * zc_nvlist_dst zpl property nvlist 1885 * zc_nvlist_dst_size size of zpl property nvlist 1886 */ 1887 static int 1888 zfs_ioc_objset_zplprops(zfs_cmd_t *zc) 1889 { 1890 objset_t *os; 1891 int err; 1892 1893 /* XXX reading without owning */ 1894 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) 1895 return (err); 1896 1897 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1898 1899 /* 1900 * NB: nvl_add_zplprop() will read the objset contents, 1901 * which we aren't supposed to do with a DS_MODE_USER 1902 * hold, because it could be inconsistent. 1903 */ 1904 if (zc->zc_nvlist_dst != NULL && 1905 !zc->zc_objset_stats.dds_inconsistent && 1906 dmu_objset_type(os) == DMU_OST_ZFS) { 1907 nvlist_t *nv; 1908 1909 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1910 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && 1911 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && 1912 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && 1913 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) 1914 err = put_nvlist(zc, nv); 1915 nvlist_free(nv); 1916 } else { 1917 err = ENOENT; 1918 } 1919 dmu_objset_rele(os, FTAG); 1920 return (err); 1921 } 1922 1923 static boolean_t 1924 dataset_name_hidden(const char *name) 1925 { 1926 /* 1927 * Skip over datasets that are not visible in this zone, 1928 * internal datasets (which have a $ in their name), and 1929 * temporary datasets (which have a % in their name). 1930 */ 1931 if (strchr(name, '$') != NULL) 1932 return (B_TRUE); 1933 if (strchr(name, '%') != NULL) 1934 return (B_TRUE); 1935 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 1936 return (B_TRUE); 1937 return (B_FALSE); 1938 } 1939 1940 /* 1941 * inputs: 1942 * zc_name name of filesystem 1943 * zc_cookie zap cursor 1944 * zc_nvlist_dst_size size of buffer for property nvlist 1945 * 1946 * outputs: 1947 * zc_name name of next filesystem 1948 * zc_cookie zap cursor 1949 * zc_objset_stats stats 1950 * zc_nvlist_dst property nvlist 1951 * zc_nvlist_dst_size size of property nvlist 1952 */ 1953 static int 1954 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 1955 { 1956 objset_t *os; 1957 int error; 1958 char *p; 1959 size_t orig_len = strlen(zc->zc_name); 1960 1961 top: 1962 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { 1963 if (error == ENOENT) 1964 error = ESRCH; 1965 return (error); 1966 } 1967 1968 p = strrchr(zc->zc_name, '/'); 1969 if (p == NULL || p[1] != '\0') 1970 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 1971 p = zc->zc_name + strlen(zc->zc_name); 1972 1973 /* 1974 * Pre-fetch the datasets. dmu_objset_prefetch() always returns 0 1975 * but is not declared void because its called by dmu_objset_find(). 1976 */ 1977 if (zc->zc_cookie == 0) { 1978 uint64_t cookie = 0; 1979 int len = sizeof (zc->zc_name) - (p - zc->zc_name); 1980 1981 while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0) { 1982 if (!dataset_name_hidden(zc->zc_name)) 1983 (void) dmu_objset_prefetch(zc->zc_name, NULL); 1984 } 1985 } 1986 1987 do { 1988 error = dmu_dir_list_next(os, 1989 sizeof (zc->zc_name) - (p - zc->zc_name), p, 1990 NULL, &zc->zc_cookie); 1991 if (error == ENOENT) 1992 error = ESRCH; 1993 } while (error == 0 && dataset_name_hidden(zc->zc_name)); 1994 dmu_objset_rele(os, FTAG); 1995 1996 /* 1997 * If it's an internal dataset (ie. with a '$' in its name), 1998 * don't try to get stats for it, otherwise we'll return ENOENT. 1999 */ 2000 if (error == 0 && strchr(zc->zc_name, '$') == NULL) { 2001 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 2002 if (error == ENOENT) { 2003 /* We lost a race with destroy, get the next one. */ 2004 zc->zc_name[orig_len] = '\0'; 2005 goto top; 2006 } 2007 } 2008 return (error); 2009 } 2010 2011 /* 2012 * inputs: 2013 * zc_name name of filesystem 2014 * zc_cookie zap cursor 2015 * zc_nvlist_dst_size size of buffer for property nvlist 2016 * 2017 * outputs: 2018 * zc_name name of next snapshot 2019 * zc_objset_stats stats 2020 * zc_nvlist_dst property nvlist 2021 * zc_nvlist_dst_size size of property nvlist 2022 */ 2023 static int 2024 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 2025 { 2026 objset_t *os; 2027 int error; 2028 2029 top: 2030 if (zc->zc_cookie == 0) 2031 (void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch, 2032 NULL, DS_FIND_SNAPSHOTS); 2033 2034 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2035 if (error) 2036 return (error == ENOENT ? ESRCH : error); 2037 2038 /* 2039 * A dataset name of maximum length cannot have any snapshots, 2040 * so exit immediately. 2041 */ 2042 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 2043 dmu_objset_rele(os, FTAG); 2044 return (ESRCH); 2045 } 2046 2047 error = dmu_snapshot_list_next(os, 2048 sizeof (zc->zc_name) - strlen(zc->zc_name), 2049 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie, 2050 NULL); 2051 2052 if (error == 0) { 2053 dsl_dataset_t *ds; 2054 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool; 2055 2056 /* 2057 * Since we probably don't have a hold on this snapshot, 2058 * it's possible that the objsetid could have been destroyed 2059 * and reused for a new objset. It's OK if this happens during 2060 * a zfs send operation, since the new createtxg will be 2061 * beyond the range we're interested in. 2062 */ 2063 rw_enter(&dp->dp_config_rwlock, RW_READER); 2064 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds); 2065 rw_exit(&dp->dp_config_rwlock); 2066 if (error) { 2067 if (error == ENOENT) { 2068 /* Racing with destroy, get the next one. */ 2069 *strchr(zc->zc_name, '@') = '\0'; 2070 dmu_objset_rele(os, FTAG); 2071 goto top; 2072 } 2073 } else { 2074 objset_t *ossnap; 2075 2076 error = dmu_objset_from_ds(ds, &ossnap); 2077 if (error == 0) 2078 error = zfs_ioc_objset_stats_impl(zc, ossnap); 2079 dsl_dataset_rele(ds, FTAG); 2080 } 2081 } else if (error == ENOENT) { 2082 error = ESRCH; 2083 } 2084 2085 dmu_objset_rele(os, FTAG); 2086 /* if we failed, undo the @ that we tacked on to zc_name */ 2087 if (error) 2088 *strchr(zc->zc_name, '@') = '\0'; 2089 return (error); 2090 } 2091 2092 static int 2093 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) 2094 { 2095 const char *propname = nvpair_name(pair); 2096 uint64_t *valary; 2097 unsigned int vallen; 2098 const char *domain; 2099 char *dash; 2100 zfs_userquota_prop_t type; 2101 uint64_t rid; 2102 uint64_t quota; 2103 zfsvfs_t *zfsvfs; 2104 int err; 2105 2106 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2107 nvlist_t *attrs; 2108 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2109 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2110 &pair) != 0) 2111 return (EINVAL); 2112 } 2113 2114 /* 2115 * A correctly constructed propname is encoded as 2116 * userquota@<rid>-<domain>. 2117 */ 2118 if ((dash = strchr(propname, '-')) == NULL || 2119 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 || 2120 vallen != 3) 2121 return (EINVAL); 2122 2123 domain = dash + 1; 2124 type = valary[0]; 2125 rid = valary[1]; 2126 quota = valary[2]; 2127 2128 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE); 2129 if (err == 0) { 2130 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); 2131 zfsvfs_rele(zfsvfs, FTAG); 2132 } 2133 2134 return (err); 2135 } 2136 2137 /* 2138 * If the named property is one that has a special function to set its value, 2139 * return 0 on success and a positive error code on failure; otherwise if it is 2140 * not one of the special properties handled by this function, return -1. 2141 * 2142 * XXX: It would be better for callers of the property interface if we handled 2143 * these special cases in dsl_prop.c (in the dsl layer). 2144 */ 2145 static int 2146 zfs_prop_set_special(const char *dsname, zprop_source_t source, 2147 nvpair_t *pair) 2148 { 2149 const char *propname = nvpair_name(pair); 2150 zfs_prop_t prop = zfs_name_to_prop(propname); 2151 uint64_t intval; 2152 int err; 2153 2154 if (prop == ZPROP_INVAL) { 2155 if (zfs_prop_userquota(propname)) 2156 return (zfs_prop_set_userquota(dsname, pair)); 2157 return (-1); 2158 } 2159 2160 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2161 nvlist_t *attrs; 2162 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2163 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2164 &pair) == 0); 2165 } 2166 2167 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) 2168 return (-1); 2169 2170 VERIFY(0 == nvpair_value_uint64(pair, &intval)); 2171 2172 switch (prop) { 2173 case ZFS_PROP_QUOTA: 2174 err = dsl_dir_set_quota(dsname, source, intval); 2175 break; 2176 case ZFS_PROP_REFQUOTA: 2177 err = dsl_dataset_set_quota(dsname, source, intval); 2178 break; 2179 case ZFS_PROP_RESERVATION: 2180 err = dsl_dir_set_reservation(dsname, source, intval); 2181 break; 2182 case ZFS_PROP_REFRESERVATION: 2183 err = dsl_dataset_set_reservation(dsname, source, intval); 2184 break; 2185 case ZFS_PROP_VOLSIZE: 2186 err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip), 2187 intval); 2188 break; 2189 case ZFS_PROP_VERSION: 2190 { 2191 zfsvfs_t *zfsvfs; 2192 2193 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0) 2194 break; 2195 2196 err = zfs_set_version(zfsvfs, intval); 2197 zfsvfs_rele(zfsvfs, FTAG); 2198 2199 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { 2200 zfs_cmd_t *zc; 2201 2202 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 2203 (void) strcpy(zc->zc_name, dsname); 2204 (void) zfs_ioc_userspace_upgrade(zc); 2205 kmem_free(zc, sizeof (zfs_cmd_t)); 2206 } 2207 break; 2208 } 2209 2210 default: 2211 err = -1; 2212 } 2213 2214 return (err); 2215 } 2216 2217 /* 2218 * This function is best effort. If it fails to set any of the given properties, 2219 * it continues to set as many as it can and returns the first error 2220 * encountered. If the caller provides a non-NULL errlist, it also gives the 2221 * complete list of names of all the properties it failed to set along with the 2222 * corresponding error numbers. The caller is responsible for freeing the 2223 * returned errlist. 2224 * 2225 * If every property is set successfully, zero is returned and the list pointed 2226 * at by errlist is NULL. 2227 */ 2228 int 2229 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, 2230 nvlist_t **errlist) 2231 { 2232 nvpair_t *pair; 2233 nvpair_t *propval; 2234 int rv = 0; 2235 uint64_t intval; 2236 char *strval; 2237 nvlist_t *genericnvl; 2238 nvlist_t *errors; 2239 nvlist_t *retrynvl; 2240 2241 VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2242 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2243 VERIFY(nvlist_alloc(&retrynvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2244 2245 retry: 2246 pair = NULL; 2247 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2248 const char *propname = nvpair_name(pair); 2249 zfs_prop_t prop = zfs_name_to_prop(propname); 2250 int err = 0; 2251 2252 /* decode the property value */ 2253 propval = pair; 2254 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2255 nvlist_t *attrs; 2256 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2257 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2258 &propval) != 0) 2259 err = EINVAL; 2260 } 2261 2262 /* Validate value type */ 2263 if (err == 0 && prop == ZPROP_INVAL) { 2264 if (zfs_prop_user(propname)) { 2265 if (nvpair_type(propval) != DATA_TYPE_STRING) 2266 err = EINVAL; 2267 } else if (zfs_prop_userquota(propname)) { 2268 if (nvpair_type(propval) != 2269 DATA_TYPE_UINT64_ARRAY) 2270 err = EINVAL; 2271 } else { 2272 err = EINVAL; 2273 } 2274 } else if (err == 0) { 2275 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2276 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) 2277 err = EINVAL; 2278 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { 2279 const char *unused; 2280 2281 VERIFY(nvpair_value_uint64(propval, 2282 &intval) == 0); 2283 2284 switch (zfs_prop_get_type(prop)) { 2285 case PROP_TYPE_NUMBER: 2286 break; 2287 case PROP_TYPE_STRING: 2288 err = EINVAL; 2289 break; 2290 case PROP_TYPE_INDEX: 2291 if (zfs_prop_index_to_string(prop, 2292 intval, &unused) != 0) 2293 err = EINVAL; 2294 break; 2295 default: 2296 cmn_err(CE_PANIC, 2297 "unknown property type"); 2298 } 2299 } else { 2300 err = EINVAL; 2301 } 2302 } 2303 2304 /* Validate permissions */ 2305 if (err == 0) 2306 err = zfs_check_settable(dsname, pair, CRED()); 2307 2308 if (err == 0) { 2309 err = zfs_prop_set_special(dsname, source, pair); 2310 if (err == -1) { 2311 /* 2312 * For better performance we build up a list of 2313 * properties to set in a single transaction. 2314 */ 2315 err = nvlist_add_nvpair(genericnvl, pair); 2316 } else if (err != 0 && nvl != retrynvl) { 2317 /* 2318 * This may be a spurious error caused by 2319 * receiving quota and reservation out of order. 2320 * Try again in a second pass. 2321 */ 2322 err = nvlist_add_nvpair(retrynvl, pair); 2323 } 2324 } 2325 2326 if (err != 0) 2327 VERIFY(nvlist_add_int32(errors, propname, err) == 0); 2328 } 2329 2330 if (nvl != retrynvl && !nvlist_empty(retrynvl)) { 2331 nvl = retrynvl; 2332 goto retry; 2333 } 2334 2335 if (!nvlist_empty(genericnvl) && 2336 dsl_props_set(dsname, source, genericnvl) != 0) { 2337 /* 2338 * If this fails, we still want to set as many properties as we 2339 * can, so try setting them individually. 2340 */ 2341 pair = NULL; 2342 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { 2343 const char *propname = nvpair_name(pair); 2344 int err = 0; 2345 2346 propval = pair; 2347 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2348 nvlist_t *attrs; 2349 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2350 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2351 &propval) == 0); 2352 } 2353 2354 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2355 VERIFY(nvpair_value_string(propval, 2356 &strval) == 0); 2357 err = dsl_prop_set(dsname, propname, source, 1, 2358 strlen(strval) + 1, strval); 2359 } else { 2360 VERIFY(nvpair_value_uint64(propval, 2361 &intval) == 0); 2362 err = dsl_prop_set(dsname, propname, source, 8, 2363 1, &intval); 2364 } 2365 2366 if (err != 0) { 2367 VERIFY(nvlist_add_int32(errors, propname, 2368 err) == 0); 2369 } 2370 } 2371 } 2372 nvlist_free(genericnvl); 2373 nvlist_free(retrynvl); 2374 2375 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 2376 nvlist_free(errors); 2377 errors = NULL; 2378 } else { 2379 VERIFY(nvpair_value_int32(pair, &rv) == 0); 2380 } 2381 2382 if (errlist == NULL) 2383 nvlist_free(errors); 2384 else 2385 *errlist = errors; 2386 2387 return (rv); 2388 } 2389 2390 /* 2391 * Check that all the properties are valid user properties. 2392 */ 2393 static int 2394 zfs_check_userprops(char *fsname, nvlist_t *nvl) 2395 { 2396 nvpair_t *pair = NULL; 2397 int error = 0; 2398 2399 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2400 const char *propname = nvpair_name(pair); 2401 char *valstr; 2402 2403 if (!zfs_prop_user(propname) || 2404 nvpair_type(pair) != DATA_TYPE_STRING) 2405 return (EINVAL); 2406 2407 if (error = zfs_secpolicy_write_perms(fsname, 2408 ZFS_DELEG_PERM_USERPROP, CRED())) 2409 return (error); 2410 2411 if (strlen(propname) >= ZAP_MAXNAMELEN) 2412 return (ENAMETOOLONG); 2413 2414 VERIFY(nvpair_value_string(pair, &valstr) == 0); 2415 if (strlen(valstr) >= ZAP_MAXVALUELEN) 2416 return (E2BIG); 2417 } 2418 return (0); 2419 } 2420 2421 static void 2422 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) 2423 { 2424 nvpair_t *pair; 2425 2426 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2427 2428 pair = NULL; 2429 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { 2430 if (nvlist_exists(skipped, nvpair_name(pair))) 2431 continue; 2432 2433 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); 2434 } 2435 } 2436 2437 static int 2438 clear_received_props(objset_t *os, const char *fs, nvlist_t *props, 2439 nvlist_t *skipped) 2440 { 2441 int err = 0; 2442 nvlist_t *cleared_props = NULL; 2443 props_skip(props, skipped, &cleared_props); 2444 if (!nvlist_empty(cleared_props)) { 2445 /* 2446 * Acts on local properties until the dataset has received 2447 * properties at least once on or after SPA_VERSION_RECVD_PROPS. 2448 */ 2449 zprop_source_t flags = (ZPROP_SRC_NONE | 2450 (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0)); 2451 err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL); 2452 } 2453 nvlist_free(cleared_props); 2454 return (err); 2455 } 2456 2457 /* 2458 * inputs: 2459 * zc_name name of filesystem 2460 * zc_value name of property to set 2461 * zc_nvlist_src{_size} nvlist of properties to apply 2462 * zc_cookie received properties flag 2463 * 2464 * outputs: 2465 * zc_nvlist_dst{_size} error for each unapplied received property 2466 */ 2467 static int 2468 zfs_ioc_set_prop(zfs_cmd_t *zc) 2469 { 2470 nvlist_t *nvl; 2471 boolean_t received = zc->zc_cookie; 2472 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : 2473 ZPROP_SRC_LOCAL); 2474 nvlist_t *errors = NULL; 2475 int error; 2476 2477 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2478 zc->zc_iflags, &nvl)) != 0) 2479 return (error); 2480 2481 if (received) { 2482 nvlist_t *origprops; 2483 objset_t *os; 2484 2485 if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) { 2486 if (dsl_prop_get_received(os, &origprops) == 0) { 2487 (void) clear_received_props(os, 2488 zc->zc_name, origprops, nvl); 2489 nvlist_free(origprops); 2490 } 2491 2492 dsl_prop_set_hasrecvd(os); 2493 dmu_objset_rele(os, FTAG); 2494 } 2495 } 2496 2497 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors); 2498 2499 if (zc->zc_nvlist_dst != NULL && errors != NULL) { 2500 (void) put_nvlist(zc, errors); 2501 } 2502 2503 nvlist_free(errors); 2504 nvlist_free(nvl); 2505 return (error); 2506 } 2507 2508 /* 2509 * inputs: 2510 * zc_name name of filesystem 2511 * zc_value name of property to inherit 2512 * zc_cookie revert to received value if TRUE 2513 * 2514 * outputs: none 2515 */ 2516 static int 2517 zfs_ioc_inherit_prop(zfs_cmd_t *zc) 2518 { 2519 const char *propname = zc->zc_value; 2520 zfs_prop_t prop = zfs_name_to_prop(propname); 2521 boolean_t received = zc->zc_cookie; 2522 zprop_source_t source = (received 2523 ? ZPROP_SRC_NONE /* revert to received value, if any */ 2524 : ZPROP_SRC_INHERITED); /* explicitly inherit */ 2525 2526 if (received) { 2527 nvlist_t *dummy; 2528 nvpair_t *pair; 2529 zprop_type_t type; 2530 int err; 2531 2532 /* 2533 * zfs_prop_set_special() expects properties in the form of an 2534 * nvpair with type info. 2535 */ 2536 if (prop == ZPROP_INVAL) { 2537 if (!zfs_prop_user(propname)) 2538 return (EINVAL); 2539 2540 type = PROP_TYPE_STRING; 2541 } else if (prop == ZFS_PROP_VOLSIZE || 2542 prop == ZFS_PROP_VERSION) { 2543 return (EINVAL); 2544 } else { 2545 type = zfs_prop_get_type(prop); 2546 } 2547 2548 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2549 2550 switch (type) { 2551 case PROP_TYPE_STRING: 2552 VERIFY(0 == nvlist_add_string(dummy, propname, "")); 2553 break; 2554 case PROP_TYPE_NUMBER: 2555 case PROP_TYPE_INDEX: 2556 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); 2557 break; 2558 default: 2559 nvlist_free(dummy); 2560 return (EINVAL); 2561 } 2562 2563 pair = nvlist_next_nvpair(dummy, NULL); 2564 err = zfs_prop_set_special(zc->zc_name, source, pair); 2565 nvlist_free(dummy); 2566 if (err != -1) 2567 return (err); /* special property already handled */ 2568 } else { 2569 /* 2570 * Only check this in the non-received case. We want to allow 2571 * 'inherit -S' to revert non-inheritable properties like quota 2572 * and reservation to the received or default values even though 2573 * they are not considered inheritable. 2574 */ 2575 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) 2576 return (EINVAL); 2577 } 2578 2579 /* the property name has been validated by zfs_secpolicy_inherit() */ 2580 return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL)); 2581 } 2582 2583 static int 2584 zfs_ioc_pool_set_props(zfs_cmd_t *zc) 2585 { 2586 nvlist_t *props; 2587 spa_t *spa; 2588 int error; 2589 nvpair_t *pair; 2590 2591 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2592 zc->zc_iflags, &props)) 2593 return (error); 2594 2595 /* 2596 * If the only property is the configfile, then just do a spa_lookup() 2597 * to handle the faulted case. 2598 */ 2599 pair = nvlist_next_nvpair(props, NULL); 2600 if (pair != NULL && strcmp(nvpair_name(pair), 2601 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && 2602 nvlist_next_nvpair(props, pair) == NULL) { 2603 mutex_enter(&spa_namespace_lock); 2604 if ((spa = spa_lookup(zc->zc_name)) != NULL) { 2605 spa_configfile_set(spa, props, B_FALSE); 2606 spa_config_sync(spa, B_FALSE, B_TRUE); 2607 } 2608 mutex_exit(&spa_namespace_lock); 2609 if (spa != NULL) { 2610 nvlist_free(props); 2611 return (0); 2612 } 2613 } 2614 2615 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2616 nvlist_free(props); 2617 return (error); 2618 } 2619 2620 error = spa_prop_set(spa, props); 2621 2622 nvlist_free(props); 2623 spa_close(spa, FTAG); 2624 2625 return (error); 2626 } 2627 2628 static int 2629 zfs_ioc_pool_get_props(zfs_cmd_t *zc) 2630 { 2631 spa_t *spa; 2632 int error; 2633 nvlist_t *nvp = NULL; 2634 2635 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2636 /* 2637 * If the pool is faulted, there may be properties we can still 2638 * get (such as altroot and cachefile), so attempt to get them 2639 * anyway. 2640 */ 2641 mutex_enter(&spa_namespace_lock); 2642 if ((spa = spa_lookup(zc->zc_name)) != NULL) 2643 error = spa_prop_get(spa, &nvp); 2644 mutex_exit(&spa_namespace_lock); 2645 } else { 2646 error = spa_prop_get(spa, &nvp); 2647 spa_close(spa, FTAG); 2648 } 2649 2650 if (error == 0 && zc->zc_nvlist_dst != NULL) 2651 error = put_nvlist(zc, nvp); 2652 else 2653 error = EFAULT; 2654 2655 nvlist_free(nvp); 2656 return (error); 2657 } 2658 2659 /* 2660 * inputs: 2661 * zc_name name of filesystem 2662 * zc_nvlist_src{_size} nvlist of delegated permissions 2663 * zc_perm_action allow/unallow flag 2664 * 2665 * outputs: none 2666 */ 2667 static int 2668 zfs_ioc_set_fsacl(zfs_cmd_t *zc) 2669 { 2670 int error; 2671 nvlist_t *fsaclnv = NULL; 2672 2673 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2674 zc->zc_iflags, &fsaclnv)) != 0) 2675 return (error); 2676 2677 /* 2678 * Verify nvlist is constructed correctly 2679 */ 2680 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 2681 nvlist_free(fsaclnv); 2682 return (EINVAL); 2683 } 2684 2685 /* 2686 * If we don't have PRIV_SYS_MOUNT, then validate 2687 * that user is allowed to hand out each permission in 2688 * the nvlist(s) 2689 */ 2690 2691 error = secpolicy_zfs(CRED()); 2692 if (error) { 2693 if (zc->zc_perm_action == B_FALSE) { 2694 error = dsl_deleg_can_allow(zc->zc_name, 2695 fsaclnv, CRED()); 2696 } else { 2697 error = dsl_deleg_can_unallow(zc->zc_name, 2698 fsaclnv, CRED()); 2699 } 2700 } 2701 2702 if (error == 0) 2703 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 2704 2705 nvlist_free(fsaclnv); 2706 return (error); 2707 } 2708 2709 /* 2710 * inputs: 2711 * zc_name name of filesystem 2712 * 2713 * outputs: 2714 * zc_nvlist_src{_size} nvlist of delegated permissions 2715 */ 2716 static int 2717 zfs_ioc_get_fsacl(zfs_cmd_t *zc) 2718 { 2719 nvlist_t *nvp; 2720 int error; 2721 2722 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 2723 error = put_nvlist(zc, nvp); 2724 nvlist_free(nvp); 2725 } 2726 2727 return (error); 2728 } 2729 2730 /* 2731 * Search the vfs list for a specified resource. Returns a pointer to it 2732 * or NULL if no suitable entry is found. The caller of this routine 2733 * is responsible for releasing the returned vfs pointer. 2734 */ 2735 static vfs_t * 2736 zfs_get_vfs(const char *resource) 2737 { 2738 struct vfs *vfsp; 2739 struct vfs *vfs_found = NULL; 2740 2741 vfs_list_read_lock(); 2742 vfsp = rootvfs; 2743 do { 2744 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 2745 VFS_HOLD(vfsp); 2746 vfs_found = vfsp; 2747 break; 2748 } 2749 vfsp = vfsp->vfs_next; 2750 } while (vfsp != rootvfs); 2751 vfs_list_unlock(); 2752 return (vfs_found); 2753 } 2754 2755 /* ARGSUSED */ 2756 static void 2757 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 2758 { 2759 zfs_creat_t *zct = arg; 2760 2761 zfs_create_fs(os, cr, zct->zct_zplprops, tx); 2762 } 2763 2764 #define ZFS_PROP_UNDEFINED ((uint64_t)-1) 2765 2766 /* 2767 * inputs: 2768 * createprops list of properties requested by creator 2769 * default_zplver zpl version to use if unspecified in createprops 2770 * fuids_ok fuids allowed in this version of the spa? 2771 * os parent objset pointer (NULL if root fs) 2772 * 2773 * outputs: 2774 * zplprops values for the zplprops we attach to the master node object 2775 * is_ci true if requested file system will be purely case-insensitive 2776 * 2777 * Determine the settings for utf8only, normalization and 2778 * casesensitivity. Specific values may have been requested by the 2779 * creator and/or we can inherit values from the parent dataset. If 2780 * the file system is of too early a vintage, a creator can not 2781 * request settings for these properties, even if the requested 2782 * setting is the default value. We don't actually want to create dsl 2783 * properties for these, so remove them from the source nvlist after 2784 * processing. 2785 */ 2786 static int 2787 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, 2788 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops, 2789 nvlist_t *zplprops, boolean_t *is_ci) 2790 { 2791 uint64_t sense = ZFS_PROP_UNDEFINED; 2792 uint64_t norm = ZFS_PROP_UNDEFINED; 2793 uint64_t u8 = ZFS_PROP_UNDEFINED; 2794 2795 ASSERT(zplprops != NULL); 2796 2797 /* 2798 * Pull out creator prop choices, if any. 2799 */ 2800 if (createprops) { 2801 (void) nvlist_lookup_uint64(createprops, 2802 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); 2803 (void) nvlist_lookup_uint64(createprops, 2804 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); 2805 (void) nvlist_remove_all(createprops, 2806 zfs_prop_to_name(ZFS_PROP_NORMALIZE)); 2807 (void) nvlist_lookup_uint64(createprops, 2808 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); 2809 (void) nvlist_remove_all(createprops, 2810 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 2811 (void) nvlist_lookup_uint64(createprops, 2812 zfs_prop_to_name(ZFS_PROP_CASE), &sense); 2813 (void) nvlist_remove_all(createprops, 2814 zfs_prop_to_name(ZFS_PROP_CASE)); 2815 } 2816 2817 /* 2818 * If the zpl version requested is whacky or the file system 2819 * or pool is version is too "young" to support normalization 2820 * and the creator tried to set a value for one of the props, 2821 * error out. 2822 */ 2823 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || 2824 (zplver >= ZPL_VERSION_FUID && !fuids_ok) || 2825 (zplver >= ZPL_VERSION_SA && !sa_ok) || 2826 (zplver < ZPL_VERSION_NORMALIZATION && 2827 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || 2828 sense != ZFS_PROP_UNDEFINED))) 2829 return (ENOTSUP); 2830 2831 /* 2832 * Put the version in the zplprops 2833 */ 2834 VERIFY(nvlist_add_uint64(zplprops, 2835 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); 2836 2837 if (norm == ZFS_PROP_UNDEFINED) 2838 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); 2839 VERIFY(nvlist_add_uint64(zplprops, 2840 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); 2841 2842 /* 2843 * If we're normalizing, names must always be valid UTF-8 strings. 2844 */ 2845 if (norm) 2846 u8 = 1; 2847 if (u8 == ZFS_PROP_UNDEFINED) 2848 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); 2849 VERIFY(nvlist_add_uint64(zplprops, 2850 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); 2851 2852 if (sense == ZFS_PROP_UNDEFINED) 2853 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); 2854 VERIFY(nvlist_add_uint64(zplprops, 2855 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); 2856 2857 if (is_ci) 2858 *is_ci = (sense == ZFS_CASE_INSENSITIVE); 2859 2860 return (0); 2861 } 2862 2863 static int 2864 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, 2865 nvlist_t *zplprops, boolean_t *is_ci) 2866 { 2867 boolean_t fuids_ok, sa_ok; 2868 uint64_t zplver = ZPL_VERSION; 2869 objset_t *os = NULL; 2870 char parentname[MAXNAMELEN]; 2871 char *cp; 2872 spa_t *spa; 2873 uint64_t spa_vers; 2874 int error; 2875 2876 (void) strlcpy(parentname, dataset, sizeof (parentname)); 2877 cp = strrchr(parentname, '/'); 2878 ASSERT(cp != NULL); 2879 cp[0] = '\0'; 2880 2881 if ((error = spa_open(dataset, &spa, FTAG)) != 0) 2882 return (error); 2883 2884 spa_vers = spa_version(spa); 2885 spa_close(spa, FTAG); 2886 2887 zplver = zfs_zpl_version_map(spa_vers); 2888 fuids_ok = (zplver >= ZPL_VERSION_FUID); 2889 sa_ok = (zplver >= ZPL_VERSION_SA); 2890 2891 /* 2892 * Open parent object set so we can inherit zplprop values. 2893 */ 2894 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) 2895 return (error); 2896 2897 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops, 2898 zplprops, is_ci); 2899 dmu_objset_rele(os, FTAG); 2900 return (error); 2901 } 2902 2903 static int 2904 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, 2905 nvlist_t *zplprops, boolean_t *is_ci) 2906 { 2907 boolean_t fuids_ok; 2908 boolean_t sa_ok; 2909 uint64_t zplver = ZPL_VERSION; 2910 int error; 2911 2912 zplver = zfs_zpl_version_map(spa_vers); 2913 fuids_ok = (zplver >= ZPL_VERSION_FUID); 2914 sa_ok = (zplver >= ZPL_VERSION_SA); 2915 2916 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok, 2917 createprops, zplprops, is_ci); 2918 return (error); 2919 } 2920 2921 /* 2922 * inputs: 2923 * zc_objset_type type of objset to create (fs vs zvol) 2924 * zc_name name of new objset 2925 * zc_value name of snapshot to clone from (may be empty) 2926 * zc_nvlist_src{_size} nvlist of properties to apply 2927 * 2928 * outputs: none 2929 */ 2930 static int 2931 zfs_ioc_create(zfs_cmd_t *zc) 2932 { 2933 objset_t *clone; 2934 int error = 0; 2935 zfs_creat_t zct; 2936 nvlist_t *nvprops = NULL; 2937 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 2938 dmu_objset_type_t type = zc->zc_objset_type; 2939 2940 switch (type) { 2941 2942 case DMU_OST_ZFS: 2943 cbfunc = zfs_create_cb; 2944 break; 2945 2946 case DMU_OST_ZVOL: 2947 cbfunc = zvol_create_cb; 2948 break; 2949 2950 default: 2951 cbfunc = NULL; 2952 break; 2953 } 2954 if (strchr(zc->zc_name, '@') || 2955 strchr(zc->zc_name, '%')) 2956 return (EINVAL); 2957 2958 if (zc->zc_nvlist_src != NULL && 2959 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2960 zc->zc_iflags, &nvprops)) != 0) 2961 return (error); 2962 2963 zct.zct_zplprops = NULL; 2964 zct.zct_props = nvprops; 2965 2966 if (zc->zc_value[0] != '\0') { 2967 /* 2968 * We're creating a clone of an existing snapshot. 2969 */ 2970 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 2971 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) { 2972 nvlist_free(nvprops); 2973 return (EINVAL); 2974 } 2975 2976 error = dmu_objset_hold(zc->zc_value, FTAG, &clone); 2977 if (error) { 2978 nvlist_free(nvprops); 2979 return (error); 2980 } 2981 2982 error = dmu_objset_clone(zc->zc_name, dmu_objset_ds(clone), 0); 2983 dmu_objset_rele(clone, FTAG); 2984 if (error) { 2985 nvlist_free(nvprops); 2986 return (error); 2987 } 2988 } else { 2989 boolean_t is_insensitive = B_FALSE; 2990 2991 if (cbfunc == NULL) { 2992 nvlist_free(nvprops); 2993 return (EINVAL); 2994 } 2995 2996 if (type == DMU_OST_ZVOL) { 2997 uint64_t volsize, volblocksize; 2998 2999 if (nvprops == NULL || 3000 nvlist_lookup_uint64(nvprops, 3001 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 3002 &volsize) != 0) { 3003 nvlist_free(nvprops); 3004 return (EINVAL); 3005 } 3006 3007 if ((error = nvlist_lookup_uint64(nvprops, 3008 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3009 &volblocksize)) != 0 && error != ENOENT) { 3010 nvlist_free(nvprops); 3011 return (EINVAL); 3012 } 3013 3014 if (error != 0) 3015 volblocksize = zfs_prop_default_numeric( 3016 ZFS_PROP_VOLBLOCKSIZE); 3017 3018 if ((error = zvol_check_volblocksize( 3019 volblocksize)) != 0 || 3020 (error = zvol_check_volsize(volsize, 3021 volblocksize)) != 0) { 3022 nvlist_free(nvprops); 3023 return (error); 3024 } 3025 } else if (type == DMU_OST_ZFS) { 3026 int error; 3027 3028 /* 3029 * We have to have normalization and 3030 * case-folding flags correct when we do the 3031 * file system creation, so go figure them out 3032 * now. 3033 */ 3034 VERIFY(nvlist_alloc(&zct.zct_zplprops, 3035 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3036 error = zfs_fill_zplprops(zc->zc_name, nvprops, 3037 zct.zct_zplprops, &is_insensitive); 3038 if (error != 0) { 3039 nvlist_free(nvprops); 3040 nvlist_free(zct.zct_zplprops); 3041 return (error); 3042 } 3043 } 3044 error = dmu_objset_create(zc->zc_name, type, 3045 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); 3046 nvlist_free(zct.zct_zplprops); 3047 } 3048 3049 /* 3050 * It would be nice to do this atomically. 3051 */ 3052 if (error == 0) { 3053 error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL, 3054 nvprops, NULL); 3055 if (error != 0) 3056 (void) dmu_objset_destroy(zc->zc_name, B_FALSE); 3057 } 3058 nvlist_free(nvprops); 3059 return (error); 3060 } 3061 3062 /* 3063 * inputs: 3064 * zc_name name of filesystem 3065 * zc_value short name of snapshot 3066 * zc_cookie recursive flag 3067 * zc_nvlist_src[_size] property list 3068 * 3069 * outputs: 3070 * zc_value short snapname (i.e. part after the '@') 3071 */ 3072 static int 3073 zfs_ioc_snapshot(zfs_cmd_t *zc) 3074 { 3075 nvlist_t *nvprops = NULL; 3076 int error; 3077 boolean_t recursive = zc->zc_cookie; 3078 3079 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 3080 return (EINVAL); 3081 3082 if (zc->zc_nvlist_src != NULL && 3083 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 3084 zc->zc_iflags, &nvprops)) != 0) 3085 return (error); 3086 3087 error = zfs_check_userprops(zc->zc_name, nvprops); 3088 if (error) 3089 goto out; 3090 3091 if (!nvlist_empty(nvprops) && 3092 zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) { 3093 error = ENOTSUP; 3094 goto out; 3095 } 3096 3097 error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, NULL, 3098 nvprops, recursive, B_FALSE, -1); 3099 3100 out: 3101 nvlist_free(nvprops); 3102 return (error); 3103 } 3104 3105 int 3106 zfs_unmount_snap(const char *name, void *arg) 3107 { 3108 vfs_t *vfsp = NULL; 3109 3110 if (arg) { 3111 char *snapname = arg; 3112 char *fullname = kmem_asprintf("%s@%s", name, snapname); 3113 vfsp = zfs_get_vfs(fullname); 3114 strfree(fullname); 3115 } else if (strchr(name, '@')) { 3116 vfsp = zfs_get_vfs(name); 3117 } 3118 3119 if (vfsp) { 3120 /* 3121 * Always force the unmount for snapshots. 3122 */ 3123 int flag = MS_FORCE; 3124 int err; 3125 3126 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) { 3127 VFS_RELE(vfsp); 3128 return (err); 3129 } 3130 VFS_RELE(vfsp); 3131 if ((err = dounmount(vfsp, flag, kcred)) != 0) 3132 return (err); 3133 } 3134 return (0); 3135 } 3136 3137 /* 3138 * inputs: 3139 * zc_name name of filesystem, snaps must be under it 3140 * zc_nvlist_src[_size] full names of snapshots to destroy 3141 * zc_defer_destroy mark for deferred destroy 3142 * 3143 * outputs: 3144 * zc_name on failure, name of failed snapshot 3145 */ 3146 static int 3147 zfs_ioc_destroy_snaps_nvl(zfs_cmd_t *zc) 3148 { 3149 int err, len; 3150 nvlist_t *nvl; 3151 nvpair_t *pair; 3152 3153 if ((err = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 3154 zc->zc_iflags, &nvl)) != 0) 3155 return (err); 3156 3157 len = strlen(zc->zc_name); 3158 for (pair = nvlist_next_nvpair(nvl, NULL); pair != NULL; 3159 pair = nvlist_next_nvpair(nvl, pair)) { 3160 const char *name = nvpair_name(pair); 3161 /* 3162 * The snap name must be underneath the zc_name. This ensures 3163 * that our permission checks were legitimate. 3164 */ 3165 if (strncmp(zc->zc_name, name, len) != 0 || 3166 (name[len] != '@' && name[len] != '/')) { 3167 nvlist_free(nvl); 3168 return (EINVAL); 3169 } 3170 3171 (void) zfs_unmount_snap(name, NULL); 3172 } 3173 3174 err = dmu_snapshots_destroy_nvl(nvl, zc->zc_defer_destroy, 3175 zc->zc_name); 3176 nvlist_free(nvl); 3177 return (err); 3178 } 3179 3180 /* 3181 * inputs: 3182 * zc_name name of dataset to destroy 3183 * zc_objset_type type of objset 3184 * zc_defer_destroy mark for deferred destroy 3185 * 3186 * outputs: none 3187 */ 3188 static int 3189 zfs_ioc_destroy(zfs_cmd_t *zc) 3190 { 3191 int err; 3192 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) { 3193 err = zfs_unmount_snap(zc->zc_name, NULL); 3194 if (err) 3195 return (err); 3196 } 3197 3198 err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy); 3199 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 3200 (void) zvol_remove_minor(zc->zc_name); 3201 return (err); 3202 } 3203 3204 /* 3205 * inputs: 3206 * zc_name name of dataset to rollback (to most recent snapshot) 3207 * 3208 * outputs: none 3209 */ 3210 static int 3211 zfs_ioc_rollback(zfs_cmd_t *zc) 3212 { 3213 dsl_dataset_t *ds, *clone; 3214 int error; 3215 zfsvfs_t *zfsvfs; 3216 char *clone_name; 3217 3218 error = dsl_dataset_hold(zc->zc_name, FTAG, &ds); 3219 if (error) 3220 return (error); 3221 3222 /* must not be a snapshot */ 3223 if (dsl_dataset_is_snapshot(ds)) { 3224 dsl_dataset_rele(ds, FTAG); 3225 return (EINVAL); 3226 } 3227 3228 /* must have a most recent snapshot */ 3229 if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) { 3230 dsl_dataset_rele(ds, FTAG); 3231 return (EINVAL); 3232 } 3233 3234 /* 3235 * Create clone of most recent snapshot. 3236 */ 3237 clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name); 3238 error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT); 3239 if (error) 3240 goto out; 3241 3242 error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone); 3243 if (error) 3244 goto out; 3245 3246 /* 3247 * Do clone swap. 3248 */ 3249 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 3250 error = zfs_suspend_fs(zfsvfs); 3251 if (error == 0) { 3252 int resume_err; 3253 3254 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) { 3255 error = dsl_dataset_clone_swap(clone, ds, 3256 B_TRUE); 3257 dsl_dataset_disown(ds, FTAG); 3258 ds = NULL; 3259 } else { 3260 error = EBUSY; 3261 } 3262 resume_err = zfs_resume_fs(zfsvfs, zc->zc_name); 3263 error = error ? error : resume_err; 3264 } 3265 VFS_RELE(zfsvfs->z_vfs); 3266 } else { 3267 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) { 3268 error = dsl_dataset_clone_swap(clone, ds, B_TRUE); 3269 dsl_dataset_disown(ds, FTAG); 3270 ds = NULL; 3271 } else { 3272 error = EBUSY; 3273 } 3274 } 3275 3276 /* 3277 * Destroy clone (which also closes it). 3278 */ 3279 (void) dsl_dataset_destroy(clone, FTAG, B_FALSE); 3280 3281 out: 3282 strfree(clone_name); 3283 if (ds) 3284 dsl_dataset_rele(ds, FTAG); 3285 return (error); 3286 } 3287 3288 /* 3289 * inputs: 3290 * zc_name old name of dataset 3291 * zc_value new name of dataset 3292 * zc_cookie recursive flag (only valid for snapshots) 3293 * 3294 * outputs: none 3295 */ 3296 static int 3297 zfs_ioc_rename(zfs_cmd_t *zc) 3298 { 3299 boolean_t recursive = zc->zc_cookie & 1; 3300 3301 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3302 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3303 strchr(zc->zc_value, '%')) 3304 return (EINVAL); 3305 3306 /* 3307 * Unmount snapshot unless we're doing a recursive rename, 3308 * in which case the dataset code figures out which snapshots 3309 * to unmount. 3310 */ 3311 if (!recursive && strchr(zc->zc_name, '@') != NULL && 3312 zc->zc_objset_type == DMU_OST_ZFS) { 3313 int err = zfs_unmount_snap(zc->zc_name, NULL); 3314 if (err) 3315 return (err); 3316 } 3317 if (zc->zc_objset_type == DMU_OST_ZVOL) 3318 (void) zvol_remove_minor(zc->zc_name); 3319 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive)); 3320 } 3321 3322 static int 3323 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3324 { 3325 const char *propname = nvpair_name(pair); 3326 boolean_t issnap = (strchr(dsname, '@') != NULL); 3327 zfs_prop_t prop = zfs_name_to_prop(propname); 3328 uint64_t intval; 3329 int err; 3330 3331 if (prop == ZPROP_INVAL) { 3332 if (zfs_prop_user(propname)) { 3333 if (err = zfs_secpolicy_write_perms(dsname, 3334 ZFS_DELEG_PERM_USERPROP, cr)) 3335 return (err); 3336 return (0); 3337 } 3338 3339 if (!issnap && zfs_prop_userquota(propname)) { 3340 const char *perm = NULL; 3341 const char *uq_prefix = 3342 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3343 const char *gq_prefix = 3344 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3345 3346 if (strncmp(propname, uq_prefix, 3347 strlen(uq_prefix)) == 0) { 3348 perm = ZFS_DELEG_PERM_USERQUOTA; 3349 } else if (strncmp(propname, gq_prefix, 3350 strlen(gq_prefix)) == 0) { 3351 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3352 } else { 3353 /* USERUSED and GROUPUSED are read-only */ 3354 return (EINVAL); 3355 } 3356 3357 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3358 return (err); 3359 return (0); 3360 } 3361 3362 return (EINVAL); 3363 } 3364 3365 if (issnap) 3366 return (EINVAL); 3367 3368 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3369 /* 3370 * dsl_prop_get_all_impl() returns properties in this 3371 * format. 3372 */ 3373 nvlist_t *attrs; 3374 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3375 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3376 &pair) == 0); 3377 } 3378 3379 /* 3380 * Check that this value is valid for this pool version 3381 */ 3382 switch (prop) { 3383 case ZFS_PROP_COMPRESSION: 3384 /* 3385 * If the user specified gzip compression, make sure 3386 * the SPA supports it. We ignore any errors here since 3387 * we'll catch them later. 3388 */ 3389 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3390 nvpair_value_uint64(pair, &intval) == 0) { 3391 if (intval >= ZIO_COMPRESS_GZIP_1 && 3392 intval <= ZIO_COMPRESS_GZIP_9 && 3393 zfs_earlier_version(dsname, 3394 SPA_VERSION_GZIP_COMPRESSION)) { 3395 return (ENOTSUP); 3396 } 3397 3398 if (intval == ZIO_COMPRESS_ZLE && 3399 zfs_earlier_version(dsname, 3400 SPA_VERSION_ZLE_COMPRESSION)) 3401 return (ENOTSUP); 3402 3403 /* 3404 * If this is a bootable dataset then 3405 * verify that the compression algorithm 3406 * is supported for booting. We must return 3407 * something other than ENOTSUP since it 3408 * implies a downrev pool version. 3409 */ 3410 if (zfs_is_bootfs(dsname) && 3411 !BOOTFS_COMPRESS_VALID(intval)) { 3412 return (ERANGE); 3413 } 3414 } 3415 break; 3416 3417 case ZFS_PROP_COPIES: 3418 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3419 return (ENOTSUP); 3420 break; 3421 3422 case ZFS_PROP_DEDUP: 3423 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3424 return (ENOTSUP); 3425 break; 3426 3427 case ZFS_PROP_SHARESMB: 3428 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3429 return (ENOTSUP); 3430 break; 3431 3432 case ZFS_PROP_ACLINHERIT: 3433 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3434 nvpair_value_uint64(pair, &intval) == 0) { 3435 if (intval == ZFS_ACL_PASSTHROUGH_X && 3436 zfs_earlier_version(dsname, 3437 SPA_VERSION_PASSTHROUGH_X)) 3438 return (ENOTSUP); 3439 } 3440 break; 3441 } 3442 3443 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3444 } 3445 3446 /* 3447 * Removes properties from the given props list that fail permission checks 3448 * needed to clear them and to restore them in case of a receive error. For each 3449 * property, make sure we have both set and inherit permissions. 3450 * 3451 * Returns the first error encountered if any permission checks fail. If the 3452 * caller provides a non-NULL errlist, it also gives the complete list of names 3453 * of all the properties that failed a permission check along with the 3454 * corresponding error numbers. The caller is responsible for freeing the 3455 * returned errlist. 3456 * 3457 * If every property checks out successfully, zero is returned and the list 3458 * pointed at by errlist is NULL. 3459 */ 3460 static int 3461 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 3462 { 3463 zfs_cmd_t *zc; 3464 nvpair_t *pair, *next_pair; 3465 nvlist_t *errors; 3466 int err, rv = 0; 3467 3468 if (props == NULL) 3469 return (0); 3470 3471 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3472 3473 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 3474 (void) strcpy(zc->zc_name, dataset); 3475 pair = nvlist_next_nvpair(props, NULL); 3476 while (pair != NULL) { 3477 next_pair = nvlist_next_nvpair(props, pair); 3478 3479 (void) strcpy(zc->zc_value, nvpair_name(pair)); 3480 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 3481 (err = zfs_secpolicy_inherit(zc, CRED())) != 0) { 3482 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 3483 VERIFY(nvlist_add_int32(errors, 3484 zc->zc_value, err) == 0); 3485 } 3486 pair = next_pair; 3487 } 3488 kmem_free(zc, sizeof (zfs_cmd_t)); 3489 3490 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 3491 nvlist_free(errors); 3492 errors = NULL; 3493 } else { 3494 VERIFY(nvpair_value_int32(pair, &rv) == 0); 3495 } 3496 3497 if (errlist == NULL) 3498 nvlist_free(errors); 3499 else 3500 *errlist = errors; 3501 3502 return (rv); 3503 } 3504 3505 static boolean_t 3506 propval_equals(nvpair_t *p1, nvpair_t *p2) 3507 { 3508 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 3509 /* dsl_prop_get_all_impl() format */ 3510 nvlist_t *attrs; 3511 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 3512 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3513 &p1) == 0); 3514 } 3515 3516 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 3517 nvlist_t *attrs; 3518 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 3519 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3520 &p2) == 0); 3521 } 3522 3523 if (nvpair_type(p1) != nvpair_type(p2)) 3524 return (B_FALSE); 3525 3526 if (nvpair_type(p1) == DATA_TYPE_STRING) { 3527 char *valstr1, *valstr2; 3528 3529 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 3530 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 3531 return (strcmp(valstr1, valstr2) == 0); 3532 } else { 3533 uint64_t intval1, intval2; 3534 3535 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 3536 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 3537 return (intval1 == intval2); 3538 } 3539 } 3540 3541 /* 3542 * Remove properties from props if they are not going to change (as determined 3543 * by comparison with origprops). Remove them from origprops as well, since we 3544 * do not need to clear or restore properties that won't change. 3545 */ 3546 static void 3547 props_reduce(nvlist_t *props, nvlist_t *origprops) 3548 { 3549 nvpair_t *pair, *next_pair; 3550 3551 if (origprops == NULL) 3552 return; /* all props need to be received */ 3553 3554 pair = nvlist_next_nvpair(props, NULL); 3555 while (pair != NULL) { 3556 const char *propname = nvpair_name(pair); 3557 nvpair_t *match; 3558 3559 next_pair = nvlist_next_nvpair(props, pair); 3560 3561 if ((nvlist_lookup_nvpair(origprops, propname, 3562 &match) != 0) || !propval_equals(pair, match)) 3563 goto next; /* need to set received value */ 3564 3565 /* don't clear the existing received value */ 3566 (void) nvlist_remove_nvpair(origprops, match); 3567 /* don't bother receiving the property */ 3568 (void) nvlist_remove_nvpair(props, pair); 3569 next: 3570 pair = next_pair; 3571 } 3572 } 3573 3574 #ifdef DEBUG 3575 static boolean_t zfs_ioc_recv_inject_err; 3576 #endif 3577 3578 /* 3579 * inputs: 3580 * zc_name name of containing filesystem 3581 * zc_nvlist_src{_size} nvlist of properties to apply 3582 * zc_value name of snapshot to create 3583 * zc_string name of clone origin (if DRR_FLAG_CLONE) 3584 * zc_cookie file descriptor to recv from 3585 * zc_begin_record the BEGIN record of the stream (not byteswapped) 3586 * zc_guid force flag 3587 * zc_cleanup_fd cleanup-on-exit file descriptor 3588 * zc_action_handle handle for this guid/ds mapping (or zero on first call) 3589 * 3590 * outputs: 3591 * zc_cookie number of bytes read 3592 * zc_nvlist_dst{_size} error for each unapplied received property 3593 * zc_obj zprop_errflags_t 3594 * zc_action_handle handle for this guid/ds mapping 3595 */ 3596 static int 3597 zfs_ioc_recv(zfs_cmd_t *zc) 3598 { 3599 file_t *fp; 3600 objset_t *os; 3601 dmu_recv_cookie_t drc; 3602 boolean_t force = (boolean_t)zc->zc_guid; 3603 int fd; 3604 int error = 0; 3605 int props_error = 0; 3606 nvlist_t *errors; 3607 offset_t off; 3608 nvlist_t *props = NULL; /* sent properties */ 3609 nvlist_t *origprops = NULL; /* existing properties */ 3610 objset_t *origin = NULL; 3611 char *tosnap; 3612 char tofs[ZFS_MAXNAMELEN]; 3613 boolean_t first_recvd_props = B_FALSE; 3614 3615 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3616 strchr(zc->zc_value, '@') == NULL || 3617 strchr(zc->zc_value, '%')) 3618 return (EINVAL); 3619 3620 (void) strcpy(tofs, zc->zc_value); 3621 tosnap = strchr(tofs, '@'); 3622 *tosnap++ = '\0'; 3623 3624 if (zc->zc_nvlist_src != NULL && 3625 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 3626 zc->zc_iflags, &props)) != 0) 3627 return (error); 3628 3629 fd = zc->zc_cookie; 3630 fp = getf(fd); 3631 if (fp == NULL) { 3632 nvlist_free(props); 3633 return (EBADF); 3634 } 3635 3636 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3637 3638 if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) { 3639 if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) && 3640 !dsl_prop_get_hasrecvd(os)) { 3641 first_recvd_props = B_TRUE; 3642 } 3643 3644 /* 3645 * If new received properties are supplied, they are to 3646 * completely replace the existing received properties, so stash 3647 * away the existing ones. 3648 */ 3649 if (dsl_prop_get_received(os, &origprops) == 0) { 3650 nvlist_t *errlist = NULL; 3651 /* 3652 * Don't bother writing a property if its value won't 3653 * change (and avoid the unnecessary security checks). 3654 * 3655 * The first receive after SPA_VERSION_RECVD_PROPS is a 3656 * special case where we blow away all local properties 3657 * regardless. 3658 */ 3659 if (!first_recvd_props) 3660 props_reduce(props, origprops); 3661 if (zfs_check_clearable(tofs, origprops, 3662 &errlist) != 0) 3663 (void) nvlist_merge(errors, errlist, 0); 3664 nvlist_free(errlist); 3665 } 3666 3667 dmu_objset_rele(os, FTAG); 3668 } 3669 3670 if (zc->zc_string[0]) { 3671 error = dmu_objset_hold(zc->zc_string, FTAG, &origin); 3672 if (error) 3673 goto out; 3674 } 3675 3676 error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds, 3677 &zc->zc_begin_record, force, origin, &drc); 3678 if (origin) 3679 dmu_objset_rele(origin, FTAG); 3680 if (error) 3681 goto out; 3682 3683 /* 3684 * Set properties before we receive the stream so that they are applied 3685 * to the new data. Note that we must call dmu_recv_stream() if 3686 * dmu_recv_begin() succeeds. 3687 */ 3688 if (props) { 3689 nvlist_t *errlist; 3690 3691 if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) { 3692 if (drc.drc_newfs) { 3693 if (spa_version(os->os_spa) >= 3694 SPA_VERSION_RECVD_PROPS) 3695 first_recvd_props = B_TRUE; 3696 } else if (origprops != NULL) { 3697 if (clear_received_props(os, tofs, origprops, 3698 first_recvd_props ? NULL : props) != 0) 3699 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3700 } else { 3701 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3702 } 3703 dsl_prop_set_hasrecvd(os); 3704 } else if (!drc.drc_newfs) { 3705 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 3706 } 3707 3708 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 3709 props, &errlist); 3710 (void) nvlist_merge(errors, errlist, 0); 3711 nvlist_free(errlist); 3712 } 3713 3714 if (fit_error_list(zc, &errors) != 0 || put_nvlist(zc, errors) != 0) { 3715 /* 3716 * Caller made zc->zc_nvlist_dst less than the minimum expected 3717 * size or supplied an invalid address. 3718 */ 3719 props_error = EINVAL; 3720 } 3721 3722 off = fp->f_offset; 3723 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd, 3724 &zc->zc_action_handle); 3725 3726 if (error == 0) { 3727 zfsvfs_t *zfsvfs = NULL; 3728 3729 if (getzfsvfs(tofs, &zfsvfs) == 0) { 3730 /* online recv */ 3731 int end_err; 3732 3733 error = zfs_suspend_fs(zfsvfs); 3734 /* 3735 * If the suspend fails, then the recv_end will 3736 * likely also fail, and clean up after itself. 3737 */ 3738 end_err = dmu_recv_end(&drc); 3739 if (error == 0) 3740 error = zfs_resume_fs(zfsvfs, tofs); 3741 error = error ? error : end_err; 3742 VFS_RELE(zfsvfs->z_vfs); 3743 } else { 3744 error = dmu_recv_end(&drc); 3745 } 3746 } 3747 3748 zc->zc_cookie = off - fp->f_offset; 3749 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 3750 fp->f_offset = off; 3751 3752 #ifdef DEBUG 3753 if (zfs_ioc_recv_inject_err) { 3754 zfs_ioc_recv_inject_err = B_FALSE; 3755 error = 1; 3756 } 3757 #endif 3758 /* 3759 * On error, restore the original props. 3760 */ 3761 if (error && props) { 3762 if (dmu_objset_hold(tofs, FTAG, &os) == 0) { 3763 if (clear_received_props(os, tofs, props, NULL) != 0) { 3764 /* 3765 * We failed to clear the received properties. 3766 * Since we may have left a $recvd value on the 3767 * system, we can't clear the $hasrecvd flag. 3768 */ 3769 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3770 } else if (first_recvd_props) { 3771 dsl_prop_unset_hasrecvd(os); 3772 } 3773 dmu_objset_rele(os, FTAG); 3774 } else if (!drc.drc_newfs) { 3775 /* We failed to clear the received properties. */ 3776 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3777 } 3778 3779 if (origprops == NULL && !drc.drc_newfs) { 3780 /* We failed to stash the original properties. */ 3781 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3782 } 3783 3784 /* 3785 * dsl_props_set() will not convert RECEIVED to LOCAL on or 3786 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 3787 * explictly if we're restoring local properties cleared in the 3788 * first new-style receive. 3789 */ 3790 if (origprops != NULL && 3791 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 3792 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 3793 origprops, NULL) != 0) { 3794 /* 3795 * We stashed the original properties but failed to 3796 * restore them. 3797 */ 3798 zc->zc_obj |= ZPROP_ERR_NORESTORE; 3799 } 3800 } 3801 out: 3802 nvlist_free(props); 3803 nvlist_free(origprops); 3804 nvlist_free(errors); 3805 releasef(fd); 3806 3807 if (error == 0) 3808 error = props_error; 3809 3810 return (error); 3811 } 3812 3813 /* 3814 * inputs: 3815 * zc_name name of snapshot to send 3816 * zc_cookie file descriptor to send stream to 3817 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj) 3818 * zc_sendobj objsetid of snapshot to send 3819 * zc_fromobj objsetid of incremental fromsnap (may be zero) 3820 * zc_guid if set, estimate size of stream only. zc_cookie is ignored. 3821 * output size in zc_objset_type. 3822 * 3823 * outputs: none 3824 */ 3825 static int 3826 zfs_ioc_send(zfs_cmd_t *zc) 3827 { 3828 objset_t *fromsnap = NULL; 3829 objset_t *tosnap; 3830 int error; 3831 offset_t off; 3832 dsl_dataset_t *ds; 3833 dsl_dataset_t *dsfrom = NULL; 3834 spa_t *spa; 3835 dsl_pool_t *dp; 3836 boolean_t estimate = (zc->zc_guid != 0); 3837 3838 error = spa_open(zc->zc_name, &spa, FTAG); 3839 if (error) 3840 return (error); 3841 3842 dp = spa_get_dsl(spa); 3843 rw_enter(&dp->dp_config_rwlock, RW_READER); 3844 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 3845 rw_exit(&dp->dp_config_rwlock); 3846 if (error) { 3847 spa_close(spa, FTAG); 3848 return (error); 3849 } 3850 3851 error = dmu_objset_from_ds(ds, &tosnap); 3852 if (error) { 3853 dsl_dataset_rele(ds, FTAG); 3854 spa_close(spa, FTAG); 3855 return (error); 3856 } 3857 3858 if (zc->zc_fromobj != 0) { 3859 rw_enter(&dp->dp_config_rwlock, RW_READER); 3860 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom); 3861 rw_exit(&dp->dp_config_rwlock); 3862 spa_close(spa, FTAG); 3863 if (error) { 3864 dsl_dataset_rele(ds, FTAG); 3865 return (error); 3866 } 3867 error = dmu_objset_from_ds(dsfrom, &fromsnap); 3868 if (error) { 3869 dsl_dataset_rele(dsfrom, FTAG); 3870 dsl_dataset_rele(ds, FTAG); 3871 return (error); 3872 } 3873 } else { 3874 spa_close(spa, FTAG); 3875 } 3876 3877 if (estimate) { 3878 error = dmu_send_estimate(tosnap, fromsnap, zc->zc_obj, 3879 &zc->zc_objset_type); 3880 } else { 3881 file_t *fp = getf(zc->zc_cookie); 3882 if (fp == NULL) { 3883 dsl_dataset_rele(ds, FTAG); 3884 if (dsfrom) 3885 dsl_dataset_rele(dsfrom, FTAG); 3886 return (EBADF); 3887 } 3888 3889 off = fp->f_offset; 3890 error = dmu_send(tosnap, fromsnap, zc->zc_obj, 3891 zc->zc_cookie, fp->f_vnode, &off); 3892 3893 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 3894 fp->f_offset = off; 3895 releasef(zc->zc_cookie); 3896 } 3897 if (dsfrom) 3898 dsl_dataset_rele(dsfrom, FTAG); 3899 dsl_dataset_rele(ds, FTAG); 3900 return (error); 3901 } 3902 3903 /* 3904 * inputs: 3905 * zc_name name of snapshot on which to report progress 3906 * zc_cookie file descriptor of send stream 3907 * 3908 * outputs: 3909 * zc_cookie number of bytes written in send stream thus far 3910 */ 3911 static int 3912 zfs_ioc_send_progress(zfs_cmd_t *zc) 3913 { 3914 dsl_dataset_t *ds; 3915 dmu_sendarg_t *dsp = NULL; 3916 int error; 3917 3918 if ((error = dsl_dataset_hold(zc->zc_name, FTAG, &ds)) != 0) 3919 return (error); 3920 3921 mutex_enter(&ds->ds_sendstream_lock); 3922 3923 /* 3924 * Iterate over all the send streams currently active on this dataset. 3925 * If there's one which matches the specified file descriptor _and_ the 3926 * stream was started by the current process, return the progress of 3927 * that stream. 3928 */ 3929 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL; 3930 dsp = list_next(&ds->ds_sendstreams, dsp)) { 3931 if (dsp->dsa_outfd == zc->zc_cookie && 3932 dsp->dsa_proc == curproc) 3933 break; 3934 } 3935 3936 if (dsp != NULL) 3937 zc->zc_cookie = *(dsp->dsa_off); 3938 else 3939 error = ENOENT; 3940 3941 mutex_exit(&ds->ds_sendstream_lock); 3942 dsl_dataset_rele(ds, FTAG); 3943 return (error); 3944 } 3945 3946 static int 3947 zfs_ioc_inject_fault(zfs_cmd_t *zc) 3948 { 3949 int id, error; 3950 3951 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 3952 &zc->zc_inject_record); 3953 3954 if (error == 0) 3955 zc->zc_guid = (uint64_t)id; 3956 3957 return (error); 3958 } 3959 3960 static int 3961 zfs_ioc_clear_fault(zfs_cmd_t *zc) 3962 { 3963 return (zio_clear_fault((int)zc->zc_guid)); 3964 } 3965 3966 static int 3967 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 3968 { 3969 int id = (int)zc->zc_guid; 3970 int error; 3971 3972 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 3973 &zc->zc_inject_record); 3974 3975 zc->zc_guid = id; 3976 3977 return (error); 3978 } 3979 3980 static int 3981 zfs_ioc_error_log(zfs_cmd_t *zc) 3982 { 3983 spa_t *spa; 3984 int error; 3985 size_t count = (size_t)zc->zc_nvlist_dst_size; 3986 3987 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 3988 return (error); 3989 3990 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 3991 &count); 3992 if (error == 0) 3993 zc->zc_nvlist_dst_size = count; 3994 else 3995 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 3996 3997 spa_close(spa, FTAG); 3998 3999 return (error); 4000 } 4001 4002 static int 4003 zfs_ioc_clear(zfs_cmd_t *zc) 4004 { 4005 spa_t *spa; 4006 vdev_t *vd; 4007 int error; 4008 4009 /* 4010 * On zpool clear we also fix up missing slogs 4011 */ 4012 mutex_enter(&spa_namespace_lock); 4013 spa = spa_lookup(zc->zc_name); 4014 if (spa == NULL) { 4015 mutex_exit(&spa_namespace_lock); 4016 return (EIO); 4017 } 4018 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 4019 /* we need to let spa_open/spa_load clear the chains */ 4020 spa_set_log_state(spa, SPA_LOG_CLEAR); 4021 } 4022 spa->spa_last_open_failed = 0; 4023 mutex_exit(&spa_namespace_lock); 4024 4025 if (zc->zc_cookie & ZPOOL_NO_REWIND) { 4026 error = spa_open(zc->zc_name, &spa, FTAG); 4027 } else { 4028 nvlist_t *policy; 4029 nvlist_t *config = NULL; 4030 4031 if (zc->zc_nvlist_src == NULL) 4032 return (EINVAL); 4033 4034 if ((error = get_nvlist(zc->zc_nvlist_src, 4035 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 4036 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 4037 policy, &config); 4038 if (config != NULL) { 4039 int err; 4040 4041 if ((err = put_nvlist(zc, config)) != 0) 4042 error = err; 4043 nvlist_free(config); 4044 } 4045 nvlist_free(policy); 4046 } 4047 } 4048 4049 if (error) 4050 return (error); 4051 4052 spa_vdev_state_enter(spa, SCL_NONE); 4053 4054 if (zc->zc_guid == 0) { 4055 vd = NULL; 4056 } else { 4057 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 4058 if (vd == NULL) { 4059 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 4060 spa_close(spa, FTAG); 4061 return (ENODEV); 4062 } 4063 } 4064 4065 vdev_clear(spa, vd); 4066 4067 (void) spa_vdev_state_exit(spa, NULL, 0); 4068 4069 /* 4070 * Resume any suspended I/Os. 4071 */ 4072 if (zio_resume(spa) != 0) 4073 error = EIO; 4074 4075 spa_close(spa, FTAG); 4076 4077 return (error); 4078 } 4079 4080 static int 4081 zfs_ioc_pool_reopen(zfs_cmd_t *zc) 4082 { 4083 spa_t *spa; 4084 int error; 4085 4086 error = spa_open(zc->zc_name, &spa, FTAG); 4087 if (error) 4088 return (error); 4089 4090 spa_vdev_state_enter(spa, SCL_NONE); 4091 vdev_reopen(spa->spa_root_vdev); 4092 (void) spa_vdev_state_exit(spa, NULL, 0); 4093 spa_close(spa, FTAG); 4094 return (0); 4095 } 4096 /* 4097 * inputs: 4098 * zc_name name of filesystem 4099 * zc_value name of origin snapshot 4100 * 4101 * outputs: 4102 * zc_string name of conflicting snapshot, if there is one 4103 */ 4104 static int 4105 zfs_ioc_promote(zfs_cmd_t *zc) 4106 { 4107 char *cp; 4108 4109 /* 4110 * We don't need to unmount *all* the origin fs's snapshots, but 4111 * it's easier. 4112 */ 4113 cp = strchr(zc->zc_value, '@'); 4114 if (cp) 4115 *cp = '\0'; 4116 (void) dmu_objset_find(zc->zc_value, 4117 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS); 4118 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 4119 } 4120 4121 /* 4122 * Retrieve a single {user|group}{used|quota}@... property. 4123 * 4124 * inputs: 4125 * zc_name name of filesystem 4126 * zc_objset_type zfs_userquota_prop_t 4127 * zc_value domain name (eg. "S-1-234-567-89") 4128 * zc_guid RID/UID/GID 4129 * 4130 * outputs: 4131 * zc_cookie property value 4132 */ 4133 static int 4134 zfs_ioc_userspace_one(zfs_cmd_t *zc) 4135 { 4136 zfsvfs_t *zfsvfs; 4137 int error; 4138 4139 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 4140 return (EINVAL); 4141 4142 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4143 if (error) 4144 return (error); 4145 4146 error = zfs_userspace_one(zfsvfs, 4147 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 4148 zfsvfs_rele(zfsvfs, FTAG); 4149 4150 return (error); 4151 } 4152 4153 /* 4154 * inputs: 4155 * zc_name name of filesystem 4156 * zc_cookie zap cursor 4157 * zc_objset_type zfs_userquota_prop_t 4158 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 4159 * 4160 * outputs: 4161 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 4162 * zc_cookie zap cursor 4163 */ 4164 static int 4165 zfs_ioc_userspace_many(zfs_cmd_t *zc) 4166 { 4167 zfsvfs_t *zfsvfs; 4168 int bufsize = zc->zc_nvlist_dst_size; 4169 4170 if (bufsize <= 0) 4171 return (ENOMEM); 4172 4173 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4174 if (error) 4175 return (error); 4176 4177 void *buf = kmem_alloc(bufsize, KM_SLEEP); 4178 4179 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 4180 buf, &zc->zc_nvlist_dst_size); 4181 4182 if (error == 0) { 4183 error = xcopyout(buf, 4184 (void *)(uintptr_t)zc->zc_nvlist_dst, 4185 zc->zc_nvlist_dst_size); 4186 } 4187 kmem_free(buf, bufsize); 4188 zfsvfs_rele(zfsvfs, FTAG); 4189 4190 return (error); 4191 } 4192 4193 /* 4194 * inputs: 4195 * zc_name name of filesystem 4196 * 4197 * outputs: 4198 * none 4199 */ 4200 static int 4201 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 4202 { 4203 objset_t *os; 4204 int error = 0; 4205 zfsvfs_t *zfsvfs; 4206 4207 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 4208 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 4209 /* 4210 * If userused is not enabled, it may be because the 4211 * objset needs to be closed & reopened (to grow the 4212 * objset_phys_t). Suspend/resume the fs will do that. 4213 */ 4214 error = zfs_suspend_fs(zfsvfs); 4215 if (error == 0) 4216 error = zfs_resume_fs(zfsvfs, zc->zc_name); 4217 } 4218 if (error == 0) 4219 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 4220 VFS_RELE(zfsvfs->z_vfs); 4221 } else { 4222 /* XXX kind of reading contents without owning */ 4223 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4224 if (error) 4225 return (error); 4226 4227 error = dmu_objset_userspace_upgrade(os); 4228 dmu_objset_rele(os, FTAG); 4229 } 4230 4231 return (error); 4232 } 4233 4234 /* 4235 * We don't want to have a hard dependency 4236 * against some special symbols in sharefs 4237 * nfs, and smbsrv. Determine them if needed when 4238 * the first file system is shared. 4239 * Neither sharefs, nfs or smbsrv are unloadable modules. 4240 */ 4241 int (*znfsexport_fs)(void *arg); 4242 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 4243 int (*zsmbexport_fs)(void *arg, boolean_t add_share); 4244 4245 int zfs_nfsshare_inited; 4246 int zfs_smbshare_inited; 4247 4248 ddi_modhandle_t nfs_mod; 4249 ddi_modhandle_t sharefs_mod; 4250 ddi_modhandle_t smbsrv_mod; 4251 kmutex_t zfs_share_lock; 4252 4253 static int 4254 zfs_init_sharefs() 4255 { 4256 int error; 4257 4258 ASSERT(MUTEX_HELD(&zfs_share_lock)); 4259 /* Both NFS and SMB shares also require sharetab support. */ 4260 if (sharefs_mod == NULL && ((sharefs_mod = 4261 ddi_modopen("fs/sharefs", 4262 KRTLD_MODE_FIRST, &error)) == NULL)) { 4263 return (ENOSYS); 4264 } 4265 if (zshare_fs == NULL && ((zshare_fs = 4266 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 4267 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 4268 return (ENOSYS); 4269 } 4270 return (0); 4271 } 4272 4273 static int 4274 zfs_ioc_share(zfs_cmd_t *zc) 4275 { 4276 int error; 4277 int opcode; 4278 4279 switch (zc->zc_share.z_sharetype) { 4280 case ZFS_SHARE_NFS: 4281 case ZFS_UNSHARE_NFS: 4282 if (zfs_nfsshare_inited == 0) { 4283 mutex_enter(&zfs_share_lock); 4284 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 4285 KRTLD_MODE_FIRST, &error)) == NULL)) { 4286 mutex_exit(&zfs_share_lock); 4287 return (ENOSYS); 4288 } 4289 if (znfsexport_fs == NULL && 4290 ((znfsexport_fs = (int (*)(void *)) 4291 ddi_modsym(nfs_mod, 4292 "nfs_export", &error)) == NULL)) { 4293 mutex_exit(&zfs_share_lock); 4294 return (ENOSYS); 4295 } 4296 error = zfs_init_sharefs(); 4297 if (error) { 4298 mutex_exit(&zfs_share_lock); 4299 return (ENOSYS); 4300 } 4301 zfs_nfsshare_inited = 1; 4302 mutex_exit(&zfs_share_lock); 4303 } 4304 break; 4305 case ZFS_SHARE_SMB: 4306 case ZFS_UNSHARE_SMB: 4307 if (zfs_smbshare_inited == 0) { 4308 mutex_enter(&zfs_share_lock); 4309 if (smbsrv_mod == NULL && ((smbsrv_mod = 4310 ddi_modopen("drv/smbsrv", 4311 KRTLD_MODE_FIRST, &error)) == NULL)) { 4312 mutex_exit(&zfs_share_lock); 4313 return (ENOSYS); 4314 } 4315 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 4316 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 4317 "smb_server_share", &error)) == NULL)) { 4318 mutex_exit(&zfs_share_lock); 4319 return (ENOSYS); 4320 } 4321 error = zfs_init_sharefs(); 4322 if (error) { 4323 mutex_exit(&zfs_share_lock); 4324 return (ENOSYS); 4325 } 4326 zfs_smbshare_inited = 1; 4327 mutex_exit(&zfs_share_lock); 4328 } 4329 break; 4330 default: 4331 return (EINVAL); 4332 } 4333 4334 switch (zc->zc_share.z_sharetype) { 4335 case ZFS_SHARE_NFS: 4336 case ZFS_UNSHARE_NFS: 4337 if (error = 4338 znfsexport_fs((void *) 4339 (uintptr_t)zc->zc_share.z_exportdata)) 4340 return (error); 4341 break; 4342 case ZFS_SHARE_SMB: 4343 case ZFS_UNSHARE_SMB: 4344 if (error = zsmbexport_fs((void *) 4345 (uintptr_t)zc->zc_share.z_exportdata, 4346 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 4347 B_TRUE: B_FALSE)) { 4348 return (error); 4349 } 4350 break; 4351 } 4352 4353 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 4354 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 4355 SHAREFS_ADD : SHAREFS_REMOVE; 4356 4357 /* 4358 * Add or remove share from sharetab 4359 */ 4360 error = zshare_fs(opcode, 4361 (void *)(uintptr_t)zc->zc_share.z_sharedata, 4362 zc->zc_share.z_sharemax); 4363 4364 return (error); 4365 4366 } 4367 4368 ace_t full_access[] = { 4369 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 4370 }; 4371 4372 /* 4373 * inputs: 4374 * zc_name name of containing filesystem 4375 * zc_obj object # beyond which we want next in-use object # 4376 * 4377 * outputs: 4378 * zc_obj next in-use object # 4379 */ 4380 static int 4381 zfs_ioc_next_obj(zfs_cmd_t *zc) 4382 { 4383 objset_t *os = NULL; 4384 int error; 4385 4386 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4387 if (error) 4388 return (error); 4389 4390 error = dmu_object_next(os, &zc->zc_obj, B_FALSE, 4391 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg); 4392 4393 dmu_objset_rele(os, FTAG); 4394 return (error); 4395 } 4396 4397 /* 4398 * inputs: 4399 * zc_name name of filesystem 4400 * zc_value prefix name for snapshot 4401 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 4402 * 4403 * outputs: 4404 */ 4405 static int 4406 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc) 4407 { 4408 char *snap_name; 4409 int error; 4410 4411 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value, 4412 (u_longlong_t)ddi_get_lbolt64()); 4413 4414 if (strlen(snap_name) >= MAXNAMELEN) { 4415 strfree(snap_name); 4416 return (E2BIG); 4417 } 4418 4419 error = dmu_objset_snapshot(zc->zc_name, snap_name, snap_name, 4420 NULL, B_FALSE, B_TRUE, zc->zc_cleanup_fd); 4421 if (error != 0) { 4422 strfree(snap_name); 4423 return (error); 4424 } 4425 4426 (void) strcpy(zc->zc_value, snap_name); 4427 strfree(snap_name); 4428 return (0); 4429 } 4430 4431 /* 4432 * inputs: 4433 * zc_name name of "to" snapshot 4434 * zc_value name of "from" snapshot 4435 * zc_cookie file descriptor to write diff data on 4436 * 4437 * outputs: 4438 * dmu_diff_record_t's to the file descriptor 4439 */ 4440 static int 4441 zfs_ioc_diff(zfs_cmd_t *zc) 4442 { 4443 objset_t *fromsnap; 4444 objset_t *tosnap; 4445 file_t *fp; 4446 offset_t off; 4447 int error; 4448 4449 error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap); 4450 if (error) 4451 return (error); 4452 4453 error = dmu_objset_hold(zc->zc_value, FTAG, &fromsnap); 4454 if (error) { 4455 dmu_objset_rele(tosnap, FTAG); 4456 return (error); 4457 } 4458 4459 fp = getf(zc->zc_cookie); 4460 if (fp == NULL) { 4461 dmu_objset_rele(fromsnap, FTAG); 4462 dmu_objset_rele(tosnap, FTAG); 4463 return (EBADF); 4464 } 4465 4466 off = fp->f_offset; 4467 4468 error = dmu_diff(tosnap, fromsnap, fp->f_vnode, &off); 4469 4470 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4471 fp->f_offset = off; 4472 releasef(zc->zc_cookie); 4473 4474 dmu_objset_rele(fromsnap, FTAG); 4475 dmu_objset_rele(tosnap, FTAG); 4476 return (error); 4477 } 4478 4479 /* 4480 * Remove all ACL files in shares dir 4481 */ 4482 static int 4483 zfs_smb_acl_purge(znode_t *dzp) 4484 { 4485 zap_cursor_t zc; 4486 zap_attribute_t zap; 4487 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 4488 int error; 4489 4490 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 4491 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 4492 zap_cursor_advance(&zc)) { 4493 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 4494 NULL, 0)) != 0) 4495 break; 4496 } 4497 zap_cursor_fini(&zc); 4498 return (error); 4499 } 4500 4501 static int 4502 zfs_ioc_smb_acl(zfs_cmd_t *zc) 4503 { 4504 vnode_t *vp; 4505 znode_t *dzp; 4506 vnode_t *resourcevp = NULL; 4507 znode_t *sharedir; 4508 zfsvfs_t *zfsvfs; 4509 nvlist_t *nvlist; 4510 char *src, *target; 4511 vattr_t vattr; 4512 vsecattr_t vsec; 4513 int error = 0; 4514 4515 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 4516 NO_FOLLOW, NULL, &vp)) != 0) 4517 return (error); 4518 4519 /* Now make sure mntpnt and dataset are ZFS */ 4520 4521 if (vp->v_vfsp->vfs_fstype != zfsfstype || 4522 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 4523 zc->zc_name) != 0)) { 4524 VN_RELE(vp); 4525 return (EINVAL); 4526 } 4527 4528 dzp = VTOZ(vp); 4529 zfsvfs = dzp->z_zfsvfs; 4530 ZFS_ENTER(zfsvfs); 4531 4532 /* 4533 * Create share dir if its missing. 4534 */ 4535 mutex_enter(&zfsvfs->z_lock); 4536 if (zfsvfs->z_shares_dir == 0) { 4537 dmu_tx_t *tx; 4538 4539 tx = dmu_tx_create(zfsvfs->z_os); 4540 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 4541 ZFS_SHARES_DIR); 4542 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 4543 error = dmu_tx_assign(tx, TXG_WAIT); 4544 if (error) { 4545 dmu_tx_abort(tx); 4546 } else { 4547 error = zfs_create_share_dir(zfsvfs, tx); 4548 dmu_tx_commit(tx); 4549 } 4550 if (error) { 4551 mutex_exit(&zfsvfs->z_lock); 4552 VN_RELE(vp); 4553 ZFS_EXIT(zfsvfs); 4554 return (error); 4555 } 4556 } 4557 mutex_exit(&zfsvfs->z_lock); 4558 4559 ASSERT(zfsvfs->z_shares_dir); 4560 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 4561 VN_RELE(vp); 4562 ZFS_EXIT(zfsvfs); 4563 return (error); 4564 } 4565 4566 switch (zc->zc_cookie) { 4567 case ZFS_SMB_ACL_ADD: 4568 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 4569 vattr.va_type = VREG; 4570 vattr.va_mode = S_IFREG|0777; 4571 vattr.va_uid = 0; 4572 vattr.va_gid = 0; 4573 4574 vsec.vsa_mask = VSA_ACE; 4575 vsec.vsa_aclentp = &full_access; 4576 vsec.vsa_aclentsz = sizeof (full_access); 4577 vsec.vsa_aclcnt = 1; 4578 4579 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 4580 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 4581 if (resourcevp) 4582 VN_RELE(resourcevp); 4583 break; 4584 4585 case ZFS_SMB_ACL_REMOVE: 4586 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 4587 NULL, 0); 4588 break; 4589 4590 case ZFS_SMB_ACL_RENAME: 4591 if ((error = get_nvlist(zc->zc_nvlist_src, 4592 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 4593 VN_RELE(vp); 4594 ZFS_EXIT(zfsvfs); 4595 return (error); 4596 } 4597 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 4598 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 4599 &target)) { 4600 VN_RELE(vp); 4601 VN_RELE(ZTOV(sharedir)); 4602 ZFS_EXIT(zfsvfs); 4603 nvlist_free(nvlist); 4604 return (error); 4605 } 4606 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 4607 kcred, NULL, 0); 4608 nvlist_free(nvlist); 4609 break; 4610 4611 case ZFS_SMB_ACL_PURGE: 4612 error = zfs_smb_acl_purge(sharedir); 4613 break; 4614 4615 default: 4616 error = EINVAL; 4617 break; 4618 } 4619 4620 VN_RELE(vp); 4621 VN_RELE(ZTOV(sharedir)); 4622 4623 ZFS_EXIT(zfsvfs); 4624 4625 return (error); 4626 } 4627 4628 /* 4629 * inputs: 4630 * zc_name name of filesystem 4631 * zc_value short name of snap 4632 * zc_string user-supplied tag for this hold 4633 * zc_cookie recursive flag 4634 * zc_temphold set if hold is temporary 4635 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 4636 * zc_sendobj if non-zero, the objid for zc_name@zc_value 4637 * zc_createtxg if zc_sendobj is non-zero, snap must have zc_createtxg 4638 * 4639 * outputs: none 4640 */ 4641 static int 4642 zfs_ioc_hold(zfs_cmd_t *zc) 4643 { 4644 boolean_t recursive = zc->zc_cookie; 4645 spa_t *spa; 4646 dsl_pool_t *dp; 4647 dsl_dataset_t *ds; 4648 int error; 4649 minor_t minor = 0; 4650 4651 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 4652 return (EINVAL); 4653 4654 if (zc->zc_sendobj == 0) { 4655 return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value, 4656 zc->zc_string, recursive, zc->zc_temphold, 4657 zc->zc_cleanup_fd)); 4658 } 4659 4660 if (recursive) 4661 return (EINVAL); 4662 4663 error = spa_open(zc->zc_name, &spa, FTAG); 4664 if (error) 4665 return (error); 4666 4667 dp = spa_get_dsl(spa); 4668 rw_enter(&dp->dp_config_rwlock, RW_READER); 4669 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 4670 rw_exit(&dp->dp_config_rwlock); 4671 spa_close(spa, FTAG); 4672 if (error) 4673 return (error); 4674 4675 /* 4676 * Until we have a hold on this snapshot, it's possible that 4677 * zc_sendobj could've been destroyed and reused as part 4678 * of a later txg. Make sure we're looking at the right object. 4679 */ 4680 if (zc->zc_createtxg != ds->ds_phys->ds_creation_txg) { 4681 dsl_dataset_rele(ds, FTAG); 4682 return (ENOENT); 4683 } 4684 4685 if (zc->zc_cleanup_fd != -1 && zc->zc_temphold) { 4686 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor); 4687 if (error) { 4688 dsl_dataset_rele(ds, FTAG); 4689 return (error); 4690 } 4691 } 4692 4693 error = dsl_dataset_user_hold_for_send(ds, zc->zc_string, 4694 zc->zc_temphold); 4695 if (minor != 0) { 4696 if (error == 0) { 4697 dsl_register_onexit_hold_cleanup(ds, zc->zc_string, 4698 minor); 4699 } 4700 zfs_onexit_fd_rele(zc->zc_cleanup_fd); 4701 } 4702 dsl_dataset_rele(ds, FTAG); 4703 4704 return (error); 4705 } 4706 4707 /* 4708 * inputs: 4709 * zc_name name of dataset from which we're releasing a user hold 4710 * zc_value short name of snap 4711 * zc_string user-supplied tag for this hold 4712 * zc_cookie recursive flag 4713 * 4714 * outputs: none 4715 */ 4716 static int 4717 zfs_ioc_release(zfs_cmd_t *zc) 4718 { 4719 boolean_t recursive = zc->zc_cookie; 4720 4721 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 4722 return (EINVAL); 4723 4724 return (dsl_dataset_user_release(zc->zc_name, zc->zc_value, 4725 zc->zc_string, recursive)); 4726 } 4727 4728 /* 4729 * inputs: 4730 * zc_name name of filesystem 4731 * 4732 * outputs: 4733 * zc_nvlist_src{_size} nvlist of snapshot holds 4734 */ 4735 static int 4736 zfs_ioc_get_holds(zfs_cmd_t *zc) 4737 { 4738 nvlist_t *nvp; 4739 int error; 4740 4741 if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) { 4742 error = put_nvlist(zc, nvp); 4743 nvlist_free(nvp); 4744 } 4745 4746 return (error); 4747 } 4748 4749 /* 4750 * inputs: 4751 * zc_name name of new filesystem or snapshot 4752 * zc_value full name of old snapshot 4753 * 4754 * outputs: 4755 * zc_cookie space in bytes 4756 * zc_objset_type compressed space in bytes 4757 * zc_perm_action uncompressed space in bytes 4758 */ 4759 static int 4760 zfs_ioc_space_written(zfs_cmd_t *zc) 4761 { 4762 int error; 4763 dsl_dataset_t *new, *old; 4764 4765 error = dsl_dataset_hold(zc->zc_name, FTAG, &new); 4766 if (error != 0) 4767 return (error); 4768 error = dsl_dataset_hold(zc->zc_value, FTAG, &old); 4769 if (error != 0) { 4770 dsl_dataset_rele(new, FTAG); 4771 return (error); 4772 } 4773 4774 error = dsl_dataset_space_written(old, new, &zc->zc_cookie, 4775 &zc->zc_objset_type, &zc->zc_perm_action); 4776 dsl_dataset_rele(old, FTAG); 4777 dsl_dataset_rele(new, FTAG); 4778 return (error); 4779 } 4780 4781 /* 4782 * inputs: 4783 * zc_name full name of last snapshot 4784 * zc_value full name of first snapshot 4785 * 4786 * outputs: 4787 * zc_cookie space in bytes 4788 * zc_objset_type compressed space in bytes 4789 * zc_perm_action uncompressed space in bytes 4790 */ 4791 static int 4792 zfs_ioc_space_snaps(zfs_cmd_t *zc) 4793 { 4794 int error; 4795 dsl_dataset_t *new, *old; 4796 4797 error = dsl_dataset_hold(zc->zc_name, FTAG, &new); 4798 if (error != 0) 4799 return (error); 4800 error = dsl_dataset_hold(zc->zc_value, FTAG, &old); 4801 if (error != 0) { 4802 dsl_dataset_rele(new, FTAG); 4803 return (error); 4804 } 4805 4806 error = dsl_dataset_space_wouldfree(old, new, &zc->zc_cookie, 4807 &zc->zc_objset_type, &zc->zc_perm_action); 4808 dsl_dataset_rele(old, FTAG); 4809 dsl_dataset_rele(new, FTAG); 4810 return (error); 4811 } 4812 4813 /* 4814 * pool create, destroy, and export don't log the history as part of 4815 * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export 4816 * do the logging of those commands. 4817 */ 4818 static zfs_ioc_vec_t zfs_ioc_vec[] = { 4819 { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4820 POOL_CHECK_NONE }, 4821 { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4822 POOL_CHECK_NONE }, 4823 { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4824 POOL_CHECK_NONE }, 4825 { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4826 POOL_CHECK_NONE }, 4827 { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE, 4828 POOL_CHECK_NONE }, 4829 { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE, 4830 POOL_CHECK_NONE }, 4831 { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE, 4832 POOL_CHECK_NONE }, 4833 { zfs_ioc_pool_scan, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4834 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4835 { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE, 4836 POOL_CHECK_READONLY }, 4837 { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4838 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4839 { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4840 POOL_CHECK_NONE }, 4841 { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4842 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4843 { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4844 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4845 { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4846 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4847 { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4848 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4849 { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4850 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4851 { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4852 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4853 { zfs_ioc_vdev_setfru, zfs_secpolicy_config, POOL_NAME, B_FALSE, 4854 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4855 { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4856 POOL_CHECK_SUSPENDED }, 4857 { zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4858 POOL_CHECK_NONE }, 4859 { zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4860 POOL_CHECK_SUSPENDED }, 4861 { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4862 POOL_CHECK_SUSPENDED }, 4863 { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE, 4864 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4865 { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE, 4866 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4867 { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE, 4868 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4869 { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE, 4870 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4871 { zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE, 4872 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4873 { zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE, 4874 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4875 { zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_FALSE, 4876 POOL_CHECK_NONE }, 4877 { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4878 POOL_CHECK_NONE }, 4879 { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4880 POOL_CHECK_NONE }, 4881 { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE, 4882 POOL_CHECK_NONE }, 4883 { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE, 4884 POOL_CHECK_NONE }, 4885 { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4886 POOL_CHECK_NONE }, 4887 { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE, 4888 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4889 { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE, 4890 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4891 { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_diff, POOL_NAME, B_FALSE, 4892 POOL_CHECK_NONE }, 4893 { zfs_ioc_obj_to_path, zfs_secpolicy_diff, DATASET_NAME, B_FALSE, 4894 POOL_CHECK_SUSPENDED }, 4895 { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4896 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4897 { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE, 4898 POOL_CHECK_NONE }, 4899 { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE, 4900 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4901 { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4902 POOL_CHECK_NONE }, 4903 { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE, 4904 POOL_CHECK_NONE }, 4905 { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE, 4906 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4907 { zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE, 4908 POOL_CHECK_NONE }, 4909 { zfs_ioc_userspace_one, zfs_secpolicy_userspace_one, DATASET_NAME, 4910 B_FALSE, POOL_CHECK_NONE }, 4911 { zfs_ioc_userspace_many, zfs_secpolicy_userspace_many, DATASET_NAME, 4912 B_FALSE, POOL_CHECK_NONE }, 4913 { zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 4914 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4915 { zfs_ioc_hold, zfs_secpolicy_hold, DATASET_NAME, B_TRUE, 4916 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4917 { zfs_ioc_release, zfs_secpolicy_release, DATASET_NAME, B_TRUE, 4918 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4919 { zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4920 POOL_CHECK_SUSPENDED }, 4921 { zfs_ioc_objset_recvd_props, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4922 POOL_CHECK_NONE }, 4923 { zfs_ioc_vdev_split, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4924 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4925 { zfs_ioc_next_obj, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4926 POOL_CHECK_NONE }, 4927 { zfs_ioc_diff, zfs_secpolicy_diff, DATASET_NAME, B_FALSE, 4928 POOL_CHECK_NONE }, 4929 { zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, DATASET_NAME, 4930 B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4931 { zfs_ioc_obj_to_stats, zfs_secpolicy_diff, DATASET_NAME, B_FALSE, 4932 POOL_CHECK_SUSPENDED }, 4933 { zfs_ioc_space_written, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4934 POOL_CHECK_SUSPENDED }, 4935 { zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4936 POOL_CHECK_SUSPENDED }, 4937 { zfs_ioc_destroy_snaps_nvl, zfs_secpolicy_destroy_recursive, 4938 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4939 { zfs_ioc_pool_reguid, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4940 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY }, 4941 { zfs_ioc_pool_reopen, zfs_secpolicy_config, POOL_NAME, B_TRUE, 4942 POOL_CHECK_SUSPENDED }, 4943 { zfs_ioc_send_progress, zfs_secpolicy_read, DATASET_NAME, B_FALSE, 4944 POOL_CHECK_NONE } 4945 }; 4946 4947 int 4948 pool_status_check(const char *name, zfs_ioc_namecheck_t type, 4949 zfs_ioc_poolcheck_t check) 4950 { 4951 spa_t *spa; 4952 int error; 4953 4954 ASSERT(type == POOL_NAME || type == DATASET_NAME); 4955 4956 if (check & POOL_CHECK_NONE) 4957 return (0); 4958 4959 error = spa_open(name, &spa, FTAG); 4960 if (error == 0) { 4961 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa)) 4962 error = EAGAIN; 4963 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa)) 4964 error = EROFS; 4965 spa_close(spa, FTAG); 4966 } 4967 return (error); 4968 } 4969 4970 /* 4971 * Find a free minor number. 4972 */ 4973 minor_t 4974 zfsdev_minor_alloc(void) 4975 { 4976 static minor_t last_minor; 4977 minor_t m; 4978 4979 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 4980 4981 for (m = last_minor + 1; m != last_minor; m++) { 4982 if (m > ZFSDEV_MAX_MINOR) 4983 m = 1; 4984 if (ddi_get_soft_state(zfsdev_state, m) == NULL) { 4985 last_minor = m; 4986 return (m); 4987 } 4988 } 4989 4990 return (0); 4991 } 4992 4993 static int 4994 zfs_ctldev_init(dev_t *devp) 4995 { 4996 minor_t minor; 4997 zfs_soft_state_t *zs; 4998 4999 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5000 ASSERT(getminor(*devp) == 0); 5001 5002 minor = zfsdev_minor_alloc(); 5003 if (minor == 0) 5004 return (ENXIO); 5005 5006 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) 5007 return (EAGAIN); 5008 5009 *devp = makedevice(getemajor(*devp), minor); 5010 5011 zs = ddi_get_soft_state(zfsdev_state, minor); 5012 zs->zss_type = ZSST_CTLDEV; 5013 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data); 5014 5015 return (0); 5016 } 5017 5018 static void 5019 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor) 5020 { 5021 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5022 5023 zfs_onexit_destroy(zo); 5024 ddi_soft_state_free(zfsdev_state, minor); 5025 } 5026 5027 void * 5028 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which) 5029 { 5030 zfs_soft_state_t *zp; 5031 5032 zp = ddi_get_soft_state(zfsdev_state, minor); 5033 if (zp == NULL || zp->zss_type != which) 5034 return (NULL); 5035 5036 return (zp->zss_data); 5037 } 5038 5039 static int 5040 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr) 5041 { 5042 int error = 0; 5043 5044 if (getminor(*devp) != 0) 5045 return (zvol_open(devp, flag, otyp, cr)); 5046 5047 /* This is the control device. Allocate a new minor if requested. */ 5048 if (flag & FEXCL) { 5049 mutex_enter(&zfsdev_state_lock); 5050 error = zfs_ctldev_init(devp); 5051 mutex_exit(&zfsdev_state_lock); 5052 } 5053 5054 return (error); 5055 } 5056 5057 static int 5058 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr) 5059 { 5060 zfs_onexit_t *zo; 5061 minor_t minor = getminor(dev); 5062 5063 if (minor == 0) 5064 return (0); 5065 5066 mutex_enter(&zfsdev_state_lock); 5067 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV); 5068 if (zo == NULL) { 5069 mutex_exit(&zfsdev_state_lock); 5070 return (zvol_close(dev, flag, otyp, cr)); 5071 } 5072 zfs_ctldev_destroy(zo, minor); 5073 mutex_exit(&zfsdev_state_lock); 5074 5075 return (0); 5076 } 5077 5078 static int 5079 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 5080 { 5081 zfs_cmd_t *zc; 5082 uint_t vec; 5083 int error, rc; 5084 minor_t minor = getminor(dev); 5085 5086 if (minor != 0 && 5087 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL) 5088 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 5089 5090 vec = cmd - ZFS_IOC; 5091 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 5092 5093 if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 5094 return (EINVAL); 5095 5096 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 5097 5098 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 5099 if (error != 0) 5100 error = EFAULT; 5101 5102 if ((error == 0) && !(flag & FKIOCTL)) 5103 error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr); 5104 5105 /* 5106 * Ensure that all pool/dataset names are valid before we pass down to 5107 * the lower layers. 5108 */ 5109 if (error == 0) { 5110 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 5111 zc->zc_iflags = flag & FKIOCTL; 5112 switch (zfs_ioc_vec[vec].zvec_namecheck) { 5113 case POOL_NAME: 5114 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 5115 error = EINVAL; 5116 error = pool_status_check(zc->zc_name, 5117 zfs_ioc_vec[vec].zvec_namecheck, 5118 zfs_ioc_vec[vec].zvec_pool_check); 5119 break; 5120 5121 case DATASET_NAME: 5122 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 5123 error = EINVAL; 5124 error = pool_status_check(zc->zc_name, 5125 zfs_ioc_vec[vec].zvec_namecheck, 5126 zfs_ioc_vec[vec].zvec_pool_check); 5127 break; 5128 5129 case NO_NAME: 5130 break; 5131 } 5132 } 5133 5134 if (error == 0) 5135 error = zfs_ioc_vec[vec].zvec_func(zc); 5136 5137 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 5138 if (error == 0) { 5139 if (rc != 0) 5140 error = EFAULT; 5141 if (zfs_ioc_vec[vec].zvec_his_log) 5142 zfs_log_history(zc); 5143 } 5144 5145 kmem_free(zc, sizeof (zfs_cmd_t)); 5146 return (error); 5147 } 5148 5149 static int 5150 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 5151 { 5152 if (cmd != DDI_ATTACH) 5153 return (DDI_FAILURE); 5154 5155 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 5156 DDI_PSEUDO, 0) == DDI_FAILURE) 5157 return (DDI_FAILURE); 5158 5159 zfs_dip = dip; 5160 5161 ddi_report_dev(dip); 5162 5163 return (DDI_SUCCESS); 5164 } 5165 5166 static int 5167 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 5168 { 5169 if (spa_busy() || zfs_busy() || zvol_busy()) 5170 return (DDI_FAILURE); 5171 5172 if (cmd != DDI_DETACH) 5173 return (DDI_FAILURE); 5174 5175 zfs_dip = NULL; 5176 5177 ddi_prop_remove_all(dip); 5178 ddi_remove_minor_node(dip, NULL); 5179 5180 return (DDI_SUCCESS); 5181 } 5182 5183 /*ARGSUSED*/ 5184 static int 5185 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 5186 { 5187 switch (infocmd) { 5188 case DDI_INFO_DEVT2DEVINFO: 5189 *result = zfs_dip; 5190 return (DDI_SUCCESS); 5191 5192 case DDI_INFO_DEVT2INSTANCE: 5193 *result = (void *)0; 5194 return (DDI_SUCCESS); 5195 } 5196 5197 return (DDI_FAILURE); 5198 } 5199 5200 /* 5201 * OK, so this is a little weird. 5202 * 5203 * /dev/zfs is the control node, i.e. minor 0. 5204 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 5205 * 5206 * /dev/zfs has basically nothing to do except serve up ioctls, 5207 * so most of the standard driver entry points are in zvol.c. 5208 */ 5209 static struct cb_ops zfs_cb_ops = { 5210 zfsdev_open, /* open */ 5211 zfsdev_close, /* close */ 5212 zvol_strategy, /* strategy */ 5213 nodev, /* print */ 5214 zvol_dump, /* dump */ 5215 zvol_read, /* read */ 5216 zvol_write, /* write */ 5217 zfsdev_ioctl, /* ioctl */ 5218 nodev, /* devmap */ 5219 nodev, /* mmap */ 5220 nodev, /* segmap */ 5221 nochpoll, /* poll */ 5222 ddi_prop_op, /* prop_op */ 5223 NULL, /* streamtab */ 5224 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 5225 CB_REV, /* version */ 5226 nodev, /* async read */ 5227 nodev, /* async write */ 5228 }; 5229 5230 static struct dev_ops zfs_dev_ops = { 5231 DEVO_REV, /* version */ 5232 0, /* refcnt */ 5233 zfs_info, /* info */ 5234 nulldev, /* identify */ 5235 nulldev, /* probe */ 5236 zfs_attach, /* attach */ 5237 zfs_detach, /* detach */ 5238 nodev, /* reset */ 5239 &zfs_cb_ops, /* driver operations */ 5240 NULL, /* no bus operations */ 5241 NULL, /* power */ 5242 ddi_quiesce_not_needed, /* quiesce */ 5243 }; 5244 5245 static struct modldrv zfs_modldrv = { 5246 &mod_driverops, 5247 "ZFS storage pool", 5248 &zfs_dev_ops 5249 }; 5250 5251 static struct modlinkage modlinkage = { 5252 MODREV_1, 5253 (void *)&zfs_modlfs, 5254 (void *)&zfs_modldrv, 5255 NULL 5256 }; 5257 5258 5259 uint_t zfs_fsyncer_key; 5260 extern uint_t rrw_tsd_key; 5261 5262 int 5263 _init(void) 5264 { 5265 int error; 5266 5267 spa_init(FREAD | FWRITE); 5268 zfs_init(); 5269 zvol_init(); 5270 5271 if ((error = mod_install(&modlinkage)) != 0) { 5272 zvol_fini(); 5273 zfs_fini(); 5274 spa_fini(); 5275 return (error); 5276 } 5277 5278 tsd_create(&zfs_fsyncer_key, NULL); 5279 tsd_create(&rrw_tsd_key, NULL); 5280 5281 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 5282 ASSERT(error == 0); 5283 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 5284 5285 return (0); 5286 } 5287 5288 int 5289 _fini(void) 5290 { 5291 int error; 5292 5293 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 5294 return (EBUSY); 5295 5296 if ((error = mod_remove(&modlinkage)) != 0) 5297 return (error); 5298 5299 zvol_fini(); 5300 zfs_fini(); 5301 spa_fini(); 5302 if (zfs_nfsshare_inited) 5303 (void) ddi_modclose(nfs_mod); 5304 if (zfs_smbshare_inited) 5305 (void) ddi_modclose(smbsrv_mod); 5306 if (zfs_nfsshare_inited || zfs_smbshare_inited) 5307 (void) ddi_modclose(sharefs_mod); 5308 5309 tsd_destroy(&zfs_fsyncer_key); 5310 ldi_ident_release(zfs_li); 5311 zfs_li = NULL; 5312 mutex_destroy(&zfs_share_lock); 5313 5314 return (error); 5315 } 5316 5317 int 5318 _info(struct modinfo *modinfop) 5319 { 5320 return (mod_info(&modlinkage, modinfop)); 5321 } 5322