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 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <sys/param.h> 30 #include <sys/errno.h> 31 #include <sys/uio.h> 32 #include <sys/buf.h> 33 #include <sys/modctl.h> 34 #include <sys/open.h> 35 #include <sys/file.h> 36 #include <sys/kmem.h> 37 #include <sys/conf.h> 38 #include <sys/cmn_err.h> 39 #include <sys/stat.h> 40 #include <sys/zfs_ioctl.h> 41 #include <sys/zap.h> 42 #include <sys/spa.h> 43 #include <sys/vdev.h> 44 #include <sys/dmu.h> 45 #include <sys/dsl_dir.h> 46 #include <sys/dsl_dataset.h> 47 #include <sys/dsl_prop.h> 48 #include <sys/ddi.h> 49 #include <sys/sunddi.h> 50 #include <sys/sunldi.h> 51 #include <sys/policy.h> 52 #include <sys/zone.h> 53 #include <sys/nvpair.h> 54 #include <sys/pathname.h> 55 #include <sys/mount.h> 56 #include <sys/sdt.h> 57 #include <sys/fs/zfs.h> 58 #include <sys/zfs_ctldir.h> 59 60 #include "zfs_namecheck.h" 61 #include "zfs_prop.h" 62 63 extern struct modlfs zfs_modlfs; 64 65 extern void zfs_init(void); 66 extern void zfs_fini(void); 67 68 ldi_ident_t zfs_li = NULL; 69 dev_info_t *zfs_dip; 70 71 typedef int zfs_ioc_func_t(zfs_cmd_t *); 72 typedef int zfs_secpolicy_func_t(const char *, cred_t *); 73 74 typedef struct zfs_ioc_vec { 75 zfs_ioc_func_t *zvec_func; 76 zfs_secpolicy_func_t *zvec_secpolicy; 77 enum { 78 no_name, 79 pool_name, 80 dataset_name 81 } zvec_namecheck; 82 } zfs_ioc_vec_t; 83 84 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ 85 void 86 __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 87 { 88 const char *newfile; 89 char buf[256]; 90 va_list adx; 91 92 /* 93 * Get rid of annoying "../common/" prefix to filename. 94 */ 95 newfile = strrchr(file, '/'); 96 if (newfile != NULL) { 97 newfile = newfile + 1; /* Get rid of leading / */ 98 } else { 99 newfile = file; 100 } 101 102 va_start(adx, fmt); 103 (void) vsnprintf(buf, sizeof (buf), fmt, adx); 104 va_end(adx); 105 106 /* 107 * To get this data, use the zfs-dprintf probe as so: 108 * dtrace -q -n 'zfs-dprintf \ 109 * /stringof(arg0) == "dbuf.c"/ \ 110 * {printf("%s: %s", stringof(arg1), stringof(arg3))}' 111 * arg0 = file name 112 * arg1 = function name 113 * arg2 = line number 114 * arg3 = message 115 */ 116 DTRACE_PROBE4(zfs__dprintf, 117 char *, newfile, char *, func, int, line, char *, buf); 118 } 119 120 /* 121 * Policy for top-level read operations (list pools). Requires no privileges, 122 * and can be used in the local zone, as there is no associated dataset. 123 */ 124 /* ARGSUSED */ 125 static int 126 zfs_secpolicy_none(const char *unused1, cred_t *cr) 127 { 128 return (0); 129 } 130 131 /* 132 * Policy for dataset read operations (list children, get statistics). Requires 133 * no privileges, but must be visible in the local zone. 134 */ 135 /* ARGSUSED */ 136 static int 137 zfs_secpolicy_read(const char *dataset, cred_t *cr) 138 { 139 if (INGLOBALZONE(curproc) || 140 zone_dataset_visible(dataset, NULL)) 141 return (0); 142 143 return (ENOENT); 144 } 145 146 static int 147 zfs_dozonecheck(const char *dataset, cred_t *cr) 148 { 149 uint64_t zoned; 150 int writable = 1; 151 152 /* 153 * The dataset must be visible by this zone -- check this first 154 * so they don't see EPERM on something they shouldn't know about. 155 */ 156 if (!INGLOBALZONE(curproc) && 157 !zone_dataset_visible(dataset, &writable)) 158 return (ENOENT); 159 160 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL)) 161 return (ENOENT); 162 163 if (INGLOBALZONE(curproc)) { 164 /* 165 * If the fs is zoned, only root can access it from the 166 * global zone. 167 */ 168 if (secpolicy_zfs(cr) && zoned) 169 return (EPERM); 170 } else { 171 /* 172 * If we are in a local zone, the 'zoned' property must be set. 173 */ 174 if (!zoned) 175 return (EPERM); 176 177 /* must be writable by this zone */ 178 if (!writable) 179 return (EPERM); 180 } 181 return (0); 182 } 183 184 /* 185 * Policy for dataset write operations (create children, set properties, etc). 186 * Requires SYS_MOUNT privilege, and must be writable in the local zone. 187 */ 188 int 189 zfs_secpolicy_write(const char *dataset, cred_t *cr) 190 { 191 int error; 192 193 if (error = zfs_dozonecheck(dataset, cr)) 194 return (error); 195 196 return (secpolicy_zfs(cr)); 197 } 198 199 /* 200 * Policy for operations that want to write a dataset's parent: 201 * create, destroy, snapshot, clone, restore. 202 */ 203 static int 204 zfs_secpolicy_parent(const char *dataset, cred_t *cr) 205 { 206 char parentname[MAXNAMELEN]; 207 char *cp; 208 209 /* 210 * Remove the @bla or /bla from the end of the name to get the parent. 211 */ 212 (void) strncpy(parentname, dataset, sizeof (parentname)); 213 cp = strrchr(parentname, '@'); 214 if (cp != NULL) { 215 cp[0] = '\0'; 216 } else { 217 cp = strrchr(parentname, '/'); 218 if (cp == NULL) 219 return (ENOENT); 220 cp[0] = '\0'; 221 222 } 223 224 return (zfs_secpolicy_write(parentname, cr)); 225 } 226 227 /* 228 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 229 * SYS_CONFIG privilege, which is not available in a local zone. 230 */ 231 /* ARGSUSED */ 232 static int 233 zfs_secpolicy_config(const char *unused, cred_t *cr) 234 { 235 if (secpolicy_sys_config(cr, B_FALSE) != 0) 236 return (EPERM); 237 238 return (0); 239 } 240 241 /* 242 * Policy for fault injection. Requires all privileges. 243 */ 244 /* ARGSUSED */ 245 static int 246 zfs_secpolicy_inject(const char *unused, cred_t *cr) 247 { 248 return (secpolicy_zinject(cr)); 249 } 250 251 /* 252 * Returns the nvlist as specified by the user in the zfs_cmd_t. 253 */ 254 static int 255 get_nvlist(zfs_cmd_t *zc, nvlist_t **nvp) 256 { 257 char *packed; 258 size_t size; 259 int error; 260 nvlist_t *config = NULL; 261 262 /* 263 * Read in and unpack the user-supplied nvlist. 264 */ 265 if ((size = zc->zc_nvlist_src_size) == 0) 266 return (EINVAL); 267 268 packed = kmem_alloc(size, KM_SLEEP); 269 270 if ((error = xcopyin((void *)(uintptr_t)zc->zc_nvlist_src, packed, 271 size)) != 0) { 272 kmem_free(packed, size); 273 return (error); 274 } 275 276 if ((error = nvlist_unpack(packed, size, &config, 0)) != 0) { 277 kmem_free(packed, size); 278 return (error); 279 } 280 281 kmem_free(packed, size); 282 283 *nvp = config; 284 return (0); 285 } 286 287 static int 288 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 289 { 290 char *packed = NULL; 291 size_t size; 292 int error; 293 294 VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0); 295 296 if (size > zc->zc_nvlist_dst_size) { 297 error = ENOMEM; 298 } else { 299 VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE, 300 KM_SLEEP) == 0); 301 error = xcopyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 302 size); 303 kmem_free(packed, size); 304 } 305 306 zc->zc_nvlist_dst_size = size; 307 return (error); 308 } 309 310 static int 311 zfs_ioc_pool_create(zfs_cmd_t *zc) 312 { 313 int error; 314 nvlist_t *config; 315 316 if ((error = get_nvlist(zc, &config)) != 0) 317 return (error); 318 319 error = spa_create(zc->zc_name, config, zc->zc_value[0] == '\0' ? 320 NULL : zc->zc_value); 321 322 nvlist_free(config); 323 324 return (error); 325 } 326 327 static int 328 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 329 { 330 return (spa_destroy(zc->zc_name)); 331 } 332 333 static int 334 zfs_ioc_pool_import(zfs_cmd_t *zc) 335 { 336 int error; 337 nvlist_t *config; 338 uint64_t guid; 339 340 if ((error = get_nvlist(zc, &config)) != 0) 341 return (error); 342 343 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 344 guid != zc->zc_guid) 345 error = EINVAL; 346 else 347 error = spa_import(zc->zc_name, config, 348 zc->zc_value[0] == '\0' ? NULL : zc->zc_value); 349 350 nvlist_free(config); 351 352 return (error); 353 } 354 355 static int 356 zfs_ioc_pool_export(zfs_cmd_t *zc) 357 { 358 return (spa_export(zc->zc_name, NULL)); 359 } 360 361 static int 362 zfs_ioc_pool_configs(zfs_cmd_t *zc) 363 { 364 nvlist_t *configs; 365 int error; 366 367 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 368 return (EEXIST); 369 370 error = put_nvlist(zc, configs); 371 372 nvlist_free(configs); 373 374 return (error); 375 } 376 377 static int 378 zfs_ioc_pool_stats(zfs_cmd_t *zc) 379 { 380 nvlist_t *config; 381 int error; 382 int ret = 0; 383 384 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 385 sizeof (zc->zc_value)); 386 387 if (config != NULL) { 388 ret = put_nvlist(zc, config); 389 nvlist_free(config); 390 391 /* 392 * The config may be present even if 'error' is non-zero. 393 * In this case we return success, and preserve the real errno 394 * in 'zc_cookie'. 395 */ 396 zc->zc_cookie = error; 397 } else { 398 ret = error; 399 } 400 401 return (ret); 402 } 403 404 /* 405 * Try to import the given pool, returning pool stats as appropriate so that 406 * user land knows which devices are available and overall pool health. 407 */ 408 static int 409 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 410 { 411 nvlist_t *tryconfig, *config; 412 int error; 413 414 if ((error = get_nvlist(zc, &tryconfig)) != 0) 415 return (error); 416 417 config = spa_tryimport(tryconfig); 418 419 nvlist_free(tryconfig); 420 421 if (config == NULL) 422 return (EINVAL); 423 424 error = put_nvlist(zc, config); 425 nvlist_free(config); 426 427 return (error); 428 } 429 430 static int 431 zfs_ioc_pool_scrub(zfs_cmd_t *zc) 432 { 433 spa_t *spa; 434 int error; 435 436 error = spa_open(zc->zc_name, &spa, FTAG); 437 if (error == 0) { 438 error = spa_scrub(spa, zc->zc_cookie, B_FALSE); 439 spa_close(spa, FTAG); 440 } 441 return (error); 442 } 443 444 static int 445 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 446 { 447 spa_t *spa; 448 int error; 449 450 error = spa_open(zc->zc_name, &spa, FTAG); 451 if (error == 0) { 452 spa_freeze(spa); 453 spa_close(spa, FTAG); 454 } 455 return (error); 456 } 457 458 static int 459 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 460 { 461 spa_t *spa; 462 int error; 463 464 error = spa_open(zc->zc_name, &spa, FTAG); 465 if (error == 0) { 466 spa_upgrade(spa); 467 spa_close(spa, FTAG); 468 } 469 return (error); 470 } 471 472 static int 473 zfs_ioc_vdev_add(zfs_cmd_t *zc) 474 { 475 spa_t *spa; 476 int error; 477 nvlist_t *config; 478 479 error = spa_open(zc->zc_name, &spa, FTAG); 480 if (error != 0) 481 return (error); 482 483 if ((error = get_nvlist(zc, &config)) == 0) { 484 error = spa_vdev_add(spa, config); 485 nvlist_free(config); 486 } 487 488 spa_close(spa, FTAG); 489 return (error); 490 } 491 492 static int 493 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 494 { 495 spa_t *spa; 496 int error; 497 498 error = spa_open(zc->zc_name, &spa, FTAG); 499 if (error != 0) 500 return (error); 501 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 502 spa_close(spa, FTAG); 503 return (error); 504 } 505 506 static int 507 zfs_ioc_vdev_online(zfs_cmd_t *zc) 508 { 509 spa_t *spa; 510 int error; 511 512 error = spa_open(zc->zc_name, &spa, FTAG); 513 if (error != 0) 514 return (error); 515 error = vdev_online(spa, zc->zc_guid); 516 spa_close(spa, FTAG); 517 return (error); 518 } 519 520 static int 521 zfs_ioc_vdev_offline(zfs_cmd_t *zc) 522 { 523 spa_t *spa; 524 int istmp = zc->zc_cookie; 525 int error; 526 527 error = spa_open(zc->zc_name, &spa, FTAG); 528 if (error != 0) 529 return (error); 530 error = vdev_offline(spa, zc->zc_guid, istmp); 531 spa_close(spa, FTAG); 532 return (error); 533 } 534 535 static int 536 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 537 { 538 spa_t *spa; 539 int replacing = zc->zc_cookie; 540 nvlist_t *config; 541 int error; 542 543 error = spa_open(zc->zc_name, &spa, FTAG); 544 if (error != 0) 545 return (error); 546 547 if ((error = get_nvlist(zc, &config)) == 0) { 548 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 549 nvlist_free(config); 550 } 551 552 spa_close(spa, FTAG); 553 return (error); 554 } 555 556 static int 557 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 558 { 559 spa_t *spa; 560 int error; 561 562 error = spa_open(zc->zc_name, &spa, FTAG); 563 if (error != 0) 564 return (error); 565 566 error = spa_vdev_detach(spa, zc->zc_guid, B_FALSE); 567 568 spa_close(spa, FTAG); 569 return (error); 570 } 571 572 static int 573 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 574 { 575 spa_t *spa; 576 char *path = zc->zc_value; 577 uint64_t guid = zc->zc_guid; 578 int error; 579 580 error = spa_open(zc->zc_name, &spa, FTAG); 581 if (error != 0) 582 return (error); 583 584 error = spa_vdev_setpath(spa, guid, path); 585 586 spa_close(spa, FTAG); 587 return (error); 588 } 589 590 static int 591 zfs_ioc_objset_stats(zfs_cmd_t *zc) 592 { 593 objset_t *os = NULL; 594 int error; 595 nvlist_t *nv; 596 597 retry: 598 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 599 DS_MODE_STANDARD | DS_MODE_READONLY, &os); 600 if (error != 0) { 601 /* 602 * This is ugly: dmu_objset_open() can return EBUSY if 603 * the objset is held exclusively. Fortunately this hold is 604 * only for a short while, so we retry here. 605 * This avoids user code having to handle EBUSY, 606 * for example for a "zfs list". 607 */ 608 if (error == EBUSY) { 609 delay(1); 610 goto retry; 611 } 612 return (error); 613 } 614 615 dmu_objset_stats(os, &zc->zc_objset_stats); 616 617 if (zc->zc_nvlist_dst != NULL && 618 (error = dsl_prop_get_all(os, &nv)) == 0) { 619 error = put_nvlist(zc, nv); 620 nvlist_free(nv); 621 } 622 623 if (!error && zc->zc_objset_stats.dds_type == DMU_OST_ZVOL) 624 error = zvol_get_stats(os, &zc->zc_vol_stats); 625 626 spa_altroot(dmu_objset_spa(os), zc->zc_value, sizeof (zc->zc_value)); 627 628 dmu_objset_close(os); 629 return (error); 630 } 631 632 static int 633 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 634 { 635 objset_t *os; 636 int error; 637 char *p; 638 639 retry: 640 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 641 DS_MODE_STANDARD | DS_MODE_READONLY, &os); 642 if (error != 0) { 643 /* 644 * This is ugly: dmu_objset_open() can return EBUSY if 645 * the objset is held exclusively. Fortunately this hold is 646 * only for a short while, so we retry here. 647 * This avoids user code having to handle EBUSY, 648 * for example for a "zfs list". 649 */ 650 if (error == EBUSY) { 651 delay(1); 652 goto retry; 653 } 654 if (error == ENOENT) 655 error = ESRCH; 656 return (error); 657 } 658 659 p = strrchr(zc->zc_name, '/'); 660 if (p == NULL || p[1] != '\0') 661 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 662 p = zc->zc_name + strlen(zc->zc_name); 663 664 do { 665 error = dmu_dir_list_next(os, 666 sizeof (zc->zc_name) - (p - zc->zc_name), p, 667 NULL, &zc->zc_cookie); 668 if (error == ENOENT) 669 error = ESRCH; 670 } while (error == 0 && !INGLOBALZONE(curproc) && 671 !zone_dataset_visible(zc->zc_name, NULL)); 672 673 /* 674 * If it's a hidden dataset (ie. with a '$' in its name), don't 675 * try to get stats for it. Userland will skip over it. 676 */ 677 if (error == 0 && strchr(zc->zc_name, '$') == NULL) 678 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 679 680 dmu_objset_close(os); 681 return (error); 682 } 683 684 static int 685 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 686 { 687 objset_t *os; 688 int error; 689 690 retry: 691 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 692 DS_MODE_STANDARD | DS_MODE_READONLY, &os); 693 if (error != 0) { 694 /* 695 * This is ugly: dmu_objset_open() can return EBUSY if 696 * the objset is held exclusively. Fortunately this hold is 697 * only for a short while, so we retry here. 698 * This avoids user code having to handle EBUSY, 699 * for example for a "zfs list". 700 */ 701 if (error == EBUSY) { 702 delay(1); 703 goto retry; 704 } 705 if (error == ENOENT) 706 error = ESRCH; 707 return (error); 708 } 709 710 /* 711 * A dataset name of maximum length cannot have any snapshots, 712 * so exit immediately. 713 */ 714 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 715 dmu_objset_close(os); 716 return (ESRCH); 717 } 718 719 error = dmu_snapshot_list_next(os, 720 sizeof (zc->zc_name) - strlen(zc->zc_name), 721 zc->zc_name + strlen(zc->zc_name), NULL, &zc->zc_cookie); 722 if (error == ENOENT) 723 error = ESRCH; 724 725 if (error == 0) 726 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 727 728 dmu_objset_close(os); 729 return (error); 730 } 731 732 static int 733 zfs_set_prop_nvlist(const char *name, dev_t dev, cred_t *cr, nvlist_t *nvl) 734 { 735 nvpair_t *elem; 736 int error; 737 const char *propname; 738 zfs_prop_t prop; 739 uint64_t intval; 740 char *strval; 741 const char *unused; 742 743 elem = NULL; 744 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 745 propname = nvpair_name(elem); 746 747 if ((prop = zfs_name_to_prop(propname)) == 748 ZFS_PROP_INVAL) { 749 /* 750 * If this is a user-defined property, it must be a 751 * string, and there is no further validation to do. 752 */ 753 if (!zfs_prop_user(propname) || 754 nvpair_type(elem) != DATA_TYPE_STRING) 755 return (EINVAL); 756 757 VERIFY(nvpair_value_string(elem, &strval) == 0); 758 error = dsl_prop_set(name, propname, 1, 759 strlen(strval) + 1, strval); 760 if (error == 0) 761 continue; 762 else 763 break; 764 } 765 766 /* 767 * Check permissions for special properties. 768 */ 769 switch (prop) { 770 case ZFS_PROP_ZONED: 771 /* 772 * Disallow setting of 'zoned' from within a local zone. 773 */ 774 if (!INGLOBALZONE(curproc)) 775 return (EPERM); 776 break; 777 778 case ZFS_PROP_QUOTA: 779 if (error = zfs_dozonecheck(name, cr)) 780 return (error); 781 782 if (!INGLOBALZONE(curproc)) { 783 uint64_t zoned; 784 char setpoint[MAXNAMELEN]; 785 int dslen; 786 /* 787 * Unprivileged users are allowed to modify the 788 * quota on things *under* (ie. contained by) 789 * the thing they own. 790 */ 791 if (dsl_prop_get_integer(name, "zoned", &zoned, 792 setpoint)) 793 return (EPERM); 794 if (!zoned) /* this shouldn't happen */ 795 return (EPERM); 796 dslen = strlen(name); 797 if (dslen <= strlen(setpoint)) 798 return (EPERM); 799 } 800 } 801 802 switch (prop) { 803 case ZFS_PROP_QUOTA: 804 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 805 (error = dsl_dir_set_quota(name, 806 intval)) != 0) 807 return (error); 808 break; 809 810 case ZFS_PROP_RESERVATION: 811 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 812 (error = dsl_dir_set_reservation(name, 813 intval)) != 0) 814 return (error); 815 break; 816 817 case ZFS_PROP_VOLSIZE: 818 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 819 (error = zvol_set_volsize(name, dev, 820 intval)) != 0) 821 return (error); 822 break; 823 824 case ZFS_PROP_VOLBLOCKSIZE: 825 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 826 (error = zvol_set_volblocksize(name, 827 intval)) != 0) 828 return (error); 829 break; 830 831 default: 832 if (nvpair_type(elem) == DATA_TYPE_STRING) { 833 if (zfs_prop_get_type(prop) != 834 prop_type_string) 835 return (EINVAL); 836 VERIFY(nvpair_value_string(elem, &strval) == 0); 837 if ((error = dsl_prop_set(name, 838 nvpair_name(elem), 1, strlen(strval) + 1, 839 strval)) != 0) 840 return (error); 841 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 842 VERIFY(nvpair_value_uint64(elem, &intval) == 0); 843 844 switch (zfs_prop_get_type(prop)) { 845 case prop_type_number: 846 break; 847 case prop_type_boolean: 848 if (intval > 1) 849 return (EINVAL); 850 break; 851 case prop_type_string: 852 return (EINVAL); 853 case prop_type_index: 854 if (zfs_prop_index_to_string(prop, 855 intval, &unused) != 0) 856 return (EINVAL); 857 break; 858 default: 859 cmn_err(CE_PANIC, "unknown property " 860 "type"); 861 break; 862 } 863 864 if ((error = dsl_prop_set(name, propname, 865 8, 1, &intval)) != 0) 866 return (error); 867 } else { 868 return (EINVAL); 869 } 870 break; 871 } 872 } 873 874 return (0); 875 } 876 877 static int 878 zfs_ioc_set_prop(zfs_cmd_t *zc) 879 { 880 nvlist_t *nvl; 881 int error; 882 zfs_prop_t prop; 883 884 /* 885 * If zc_value is set, then this is an attempt to inherit a value. 886 * Otherwise, zc_nvlist refers to a list of properties to set. 887 */ 888 if (zc->zc_value[0] != '\0') { 889 if (!zfs_prop_user(zc->zc_value) && 890 ((prop = zfs_name_to_prop(zc->zc_value)) == 891 ZFS_PROP_INVAL || 892 !zfs_prop_inheritable(prop))) 893 return (EINVAL); 894 895 return (dsl_prop_set(zc->zc_name, zc->zc_value, 0, 0, NULL)); 896 } 897 898 if ((error = get_nvlist(zc, &nvl)) != 0) 899 return (error); 900 901 error = zfs_set_prop_nvlist(zc->zc_name, zc->zc_dev, 902 (cred_t *)(uintptr_t)zc->zc_cred, nvl); 903 nvlist_free(nvl); 904 return (error); 905 } 906 907 static int 908 zfs_ioc_create_minor(zfs_cmd_t *zc) 909 { 910 return (zvol_create_minor(zc->zc_name, zc->zc_dev)); 911 } 912 913 static int 914 zfs_ioc_remove_minor(zfs_cmd_t *zc) 915 { 916 return (zvol_remove_minor(zc->zc_name)); 917 } 918 919 /* 920 * Search the vfs list for a specified resource. Returns a pointer to it 921 * or NULL if no suitable entry is found. The caller of this routine 922 * is responsible for releasing the returned vfs pointer. 923 */ 924 static vfs_t * 925 zfs_get_vfs(const char *resource) 926 { 927 struct vfs *vfsp; 928 struct vfs *vfs_found = NULL; 929 930 vfs_list_read_lock(); 931 vfsp = rootvfs; 932 do { 933 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 934 VFS_HOLD(vfsp); 935 vfs_found = vfsp; 936 break; 937 } 938 vfsp = vfsp->vfs_next; 939 } while (vfsp != rootvfs); 940 vfs_list_unlock(); 941 return (vfs_found); 942 } 943 944 static void 945 zfs_create_cb(objset_t *os, void *arg, dmu_tx_t *tx) 946 { 947 zfs_create_data_t *zc = arg; 948 zfs_create_fs(os, (cred_t *)(uintptr_t)zc->zc_cred, tx); 949 } 950 951 static int 952 zfs_ioc_create(zfs_cmd_t *zc) 953 { 954 objset_t *clone; 955 int error = 0; 956 zfs_create_data_t cbdata = { 0 }; 957 void (*cbfunc)(objset_t *os, void *arg, dmu_tx_t *tx); 958 dmu_objset_type_t type = zc->zc_objset_type; 959 960 switch (type) { 961 962 case DMU_OST_ZFS: 963 cbfunc = zfs_create_cb; 964 break; 965 966 case DMU_OST_ZVOL: 967 cbfunc = zvol_create_cb; 968 break; 969 970 default: 971 cbfunc = NULL; 972 } 973 if (strchr(zc->zc_name, '@')) 974 return (EINVAL); 975 976 if (zc->zc_nvlist_src != NULL && 977 (error = get_nvlist(zc, &cbdata.zc_props)) != 0) 978 return (error); 979 980 cbdata.zc_cred = (cred_t *)(uintptr_t)zc->zc_cred; 981 cbdata.zc_dev = (dev_t)zc->zc_dev; 982 983 if (zc->zc_value[0] != '\0') { 984 /* 985 * We're creating a clone of an existing snapshot. 986 */ 987 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 988 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) { 989 nvlist_free(cbdata.zc_props); 990 return (EINVAL); 991 } 992 993 error = dmu_objset_open(zc->zc_value, type, 994 DS_MODE_STANDARD | DS_MODE_READONLY, &clone); 995 if (error) { 996 nvlist_free(cbdata.zc_props); 997 return (error); 998 } 999 error = dmu_objset_create(zc->zc_name, type, clone, NULL, NULL); 1000 dmu_objset_close(clone); 1001 } else { 1002 if (cbfunc == NULL) { 1003 nvlist_free(cbdata.zc_props); 1004 return (EINVAL); 1005 } 1006 1007 if (type == DMU_OST_ZVOL) { 1008 uint64_t volsize, volblocksize; 1009 1010 if (cbdata.zc_props == NULL || 1011 nvlist_lookup_uint64(cbdata.zc_props, 1012 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1013 &volsize) != 0) { 1014 nvlist_free(cbdata.zc_props); 1015 return (EINVAL); 1016 } 1017 1018 if ((error = nvlist_lookup_uint64(cbdata.zc_props, 1019 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1020 &volblocksize)) != 0 && error != ENOENT) { 1021 nvlist_free(cbdata.zc_props); 1022 return (EINVAL); 1023 } 1024 1025 if (error != 0) 1026 volblocksize = zfs_prop_default_numeric( 1027 ZFS_PROP_VOLBLOCKSIZE); 1028 1029 if ((error = zvol_check_volblocksize( 1030 volblocksize)) != 0 || 1031 (error = zvol_check_volsize(volsize, 1032 volblocksize)) != 0) { 1033 nvlist_free(cbdata.zc_props); 1034 return (error); 1035 } 1036 } 1037 1038 error = dmu_objset_create(zc->zc_name, type, NULL, cbfunc, 1039 &cbdata); 1040 } 1041 1042 /* 1043 * It would be nice to do this atomically. 1044 */ 1045 if (error == 0) { 1046 if ((error = zfs_set_prop_nvlist(zc->zc_name, 1047 zc->zc_dev, (cred_t *)(uintptr_t)zc->zc_cred, 1048 cbdata.zc_props)) != 0) 1049 (void) dmu_objset_destroy(zc->zc_name); 1050 } 1051 1052 nvlist_free(cbdata.zc_props); 1053 return (error); 1054 } 1055 1056 static int 1057 zfs_ioc_snapshot(zfs_cmd_t *zc) 1058 { 1059 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 1060 return (EINVAL); 1061 return (dmu_objset_snapshot(zc->zc_name, 1062 zc->zc_value, zc->zc_cookie)); 1063 } 1064 1065 static int 1066 zfs_unmount_snap(char *name, void *arg) 1067 { 1068 char *snapname = arg; 1069 char *cp; 1070 vfs_t *vfsp = NULL; 1071 1072 /* 1073 * Snapshots (which are under .zfs control) must be unmounted 1074 * before they can be destroyed. 1075 */ 1076 1077 if (snapname) { 1078 (void) strcat(name, "@"); 1079 (void) strcat(name, snapname); 1080 vfsp = zfs_get_vfs(name); 1081 cp = strchr(name, '@'); 1082 *cp = '\0'; 1083 } else if (strchr(name, '@')) { 1084 vfsp = zfs_get_vfs(name); 1085 } 1086 1087 if (vfsp) { 1088 /* 1089 * Always force the unmount for snapshots. 1090 */ 1091 int flag = MS_FORCE; 1092 int err; 1093 1094 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) { 1095 VFS_RELE(vfsp); 1096 return (err); 1097 } 1098 VFS_RELE(vfsp); 1099 if ((err = dounmount(vfsp, flag, kcred)) != 0) 1100 return (err); 1101 } 1102 return (0); 1103 } 1104 1105 static int 1106 zfs_ioc_destroy_snaps(zfs_cmd_t *zc) 1107 { 1108 int err; 1109 1110 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 1111 return (EINVAL); 1112 err = dmu_objset_find(zc->zc_name, 1113 zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN); 1114 if (err) 1115 return (err); 1116 return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value)); 1117 } 1118 1119 static int 1120 zfs_ioc_destroy(zfs_cmd_t *zc) 1121 { 1122 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) { 1123 int err = zfs_unmount_snap(zc->zc_name, NULL); 1124 if (err) 1125 return (err); 1126 } 1127 1128 return (dmu_objset_destroy(zc->zc_name)); 1129 } 1130 1131 static int 1132 zfs_ioc_rollback(zfs_cmd_t *zc) 1133 { 1134 return (dmu_objset_rollback(zc->zc_name)); 1135 } 1136 1137 static int 1138 zfs_ioc_rename(zfs_cmd_t *zc) 1139 { 1140 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 1141 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) 1142 return (EINVAL); 1143 1144 if (strchr(zc->zc_name, '@') != NULL && 1145 zc->zc_objset_type == DMU_OST_ZFS) { 1146 int err = zfs_unmount_snap(zc->zc_name, NULL); 1147 if (err) 1148 return (err); 1149 } 1150 1151 return (dmu_objset_rename(zc->zc_name, zc->zc_value)); 1152 } 1153 1154 static int 1155 zfs_ioc_recvbackup(zfs_cmd_t *zc) 1156 { 1157 file_t *fp; 1158 int error, fd; 1159 1160 fd = zc->zc_cookie; 1161 fp = getf(fd); 1162 if (fp == NULL) 1163 return (EBADF); 1164 error = dmu_recvbackup(zc->zc_value, &zc->zc_begin_record, 1165 &zc->zc_cookie, (boolean_t)zc->zc_guid, fp->f_vnode, 1166 fp->f_offset); 1167 releasef(fd); 1168 return (error); 1169 } 1170 1171 static int 1172 zfs_ioc_sendbackup(zfs_cmd_t *zc) 1173 { 1174 objset_t *fromsnap = NULL; 1175 objset_t *tosnap; 1176 file_t *fp; 1177 int error; 1178 1179 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 1180 DS_MODE_STANDARD | DS_MODE_READONLY, &tosnap); 1181 if (error) 1182 return (error); 1183 1184 if (zc->zc_value[0] != '\0') { 1185 error = dmu_objset_open(zc->zc_value, DMU_OST_ANY, 1186 DS_MODE_STANDARD | DS_MODE_READONLY, &fromsnap); 1187 if (error) { 1188 dmu_objset_close(tosnap); 1189 return (error); 1190 } 1191 } 1192 1193 fp = getf(zc->zc_cookie); 1194 if (fp == NULL) { 1195 dmu_objset_close(tosnap); 1196 if (fromsnap) 1197 dmu_objset_close(fromsnap); 1198 return (EBADF); 1199 } 1200 1201 error = dmu_sendbackup(tosnap, fromsnap, fp->f_vnode); 1202 1203 releasef(zc->zc_cookie); 1204 if (fromsnap) 1205 dmu_objset_close(fromsnap); 1206 dmu_objset_close(tosnap); 1207 return (error); 1208 } 1209 1210 static int 1211 zfs_ioc_inject_fault(zfs_cmd_t *zc) 1212 { 1213 int id, error; 1214 1215 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 1216 &zc->zc_inject_record); 1217 1218 if (error == 0) 1219 zc->zc_guid = (uint64_t)id; 1220 1221 return (error); 1222 } 1223 1224 static int 1225 zfs_ioc_clear_fault(zfs_cmd_t *zc) 1226 { 1227 return (zio_clear_fault((int)zc->zc_guid)); 1228 } 1229 1230 static int 1231 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 1232 { 1233 int id = (int)zc->zc_guid; 1234 int error; 1235 1236 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 1237 &zc->zc_inject_record); 1238 1239 zc->zc_guid = id; 1240 1241 return (error); 1242 } 1243 1244 static int 1245 zfs_ioc_error_log(zfs_cmd_t *zc) 1246 { 1247 spa_t *spa; 1248 int error; 1249 size_t count = (size_t)zc->zc_nvlist_dst_size; 1250 1251 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1252 return (error); 1253 1254 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 1255 &count); 1256 if (error == 0) 1257 zc->zc_nvlist_dst_size = count; 1258 else 1259 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 1260 1261 spa_close(spa, FTAG); 1262 1263 return (error); 1264 } 1265 1266 static int 1267 zfs_ioc_clear(zfs_cmd_t *zc) 1268 { 1269 spa_t *spa; 1270 vdev_t *vd; 1271 int error; 1272 1273 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1274 return (error); 1275 1276 spa_config_enter(spa, RW_WRITER, FTAG); 1277 1278 if (zc->zc_guid == 0) { 1279 vd = NULL; 1280 } else if ((vd = spa_lookup_by_guid(spa, zc->zc_guid)) == NULL) { 1281 spa_config_exit(spa, FTAG); 1282 spa_close(spa, FTAG); 1283 return (ENODEV); 1284 } 1285 1286 vdev_clear(spa, vd); 1287 1288 spa_config_exit(spa, FTAG); 1289 1290 spa_close(spa, FTAG); 1291 1292 return (0); 1293 } 1294 1295 static int 1296 zfs_ioc_bookmark_name(zfs_cmd_t *zc) 1297 { 1298 spa_t *spa; 1299 int error; 1300 nvlist_t *nvl; 1301 1302 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1303 return (error); 1304 1305 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1306 1307 error = spa_bookmark_name(spa, &zc->zc_bookmark, nvl); 1308 if (error == 0) 1309 error = put_nvlist(zc, nvl); 1310 nvlist_free(nvl); 1311 1312 spa_close(spa, FTAG); 1313 1314 return (error); 1315 } 1316 1317 static int 1318 zfs_ioc_promote(zfs_cmd_t *zc) 1319 { 1320 char *cp; 1321 1322 /* 1323 * We don't need to unmount *all* the origin fs's snapshots, but 1324 * it's easier. 1325 */ 1326 cp = strchr(zc->zc_value, '@'); 1327 if (cp) 1328 *cp = '\0'; 1329 (void) dmu_objset_find(zc->zc_value, 1330 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS); 1331 return (dsl_dataset_promote(zc->zc_name)); 1332 } 1333 1334 static zfs_ioc_vec_t zfs_ioc_vec[] = { 1335 { zfs_ioc_pool_create, zfs_secpolicy_config, pool_name }, 1336 { zfs_ioc_pool_destroy, zfs_secpolicy_config, pool_name }, 1337 { zfs_ioc_pool_import, zfs_secpolicy_config, pool_name }, 1338 { zfs_ioc_pool_export, zfs_secpolicy_config, pool_name }, 1339 { zfs_ioc_pool_configs, zfs_secpolicy_none, no_name }, 1340 { zfs_ioc_pool_stats, zfs_secpolicy_read, pool_name }, 1341 { zfs_ioc_pool_tryimport, zfs_secpolicy_config, no_name }, 1342 { zfs_ioc_pool_scrub, zfs_secpolicy_config, pool_name }, 1343 { zfs_ioc_pool_freeze, zfs_secpolicy_config, no_name }, 1344 { zfs_ioc_pool_upgrade, zfs_secpolicy_config, pool_name }, 1345 { zfs_ioc_vdev_add, zfs_secpolicy_config, pool_name }, 1346 { zfs_ioc_vdev_remove, zfs_secpolicy_config, pool_name }, 1347 { zfs_ioc_vdev_online, zfs_secpolicy_config, pool_name }, 1348 { zfs_ioc_vdev_offline, zfs_secpolicy_config, pool_name }, 1349 { zfs_ioc_vdev_attach, zfs_secpolicy_config, pool_name }, 1350 { zfs_ioc_vdev_detach, zfs_secpolicy_config, pool_name }, 1351 { zfs_ioc_vdev_setpath, zfs_secpolicy_config, pool_name }, 1352 { zfs_ioc_objset_stats, zfs_secpolicy_read, dataset_name }, 1353 { zfs_ioc_dataset_list_next, zfs_secpolicy_read, dataset_name }, 1354 { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, dataset_name }, 1355 { zfs_ioc_set_prop, zfs_secpolicy_write, dataset_name }, 1356 { zfs_ioc_create_minor, zfs_secpolicy_config, dataset_name }, 1357 { zfs_ioc_remove_minor, zfs_secpolicy_config, dataset_name }, 1358 { zfs_ioc_create, zfs_secpolicy_parent, dataset_name }, 1359 { zfs_ioc_destroy, zfs_secpolicy_parent, dataset_name }, 1360 { zfs_ioc_rollback, zfs_secpolicy_write, dataset_name }, 1361 { zfs_ioc_rename, zfs_secpolicy_write, dataset_name }, 1362 { zfs_ioc_recvbackup, zfs_secpolicy_write, dataset_name }, 1363 { zfs_ioc_sendbackup, zfs_secpolicy_write, dataset_name }, 1364 { zfs_ioc_inject_fault, zfs_secpolicy_inject, no_name }, 1365 { zfs_ioc_clear_fault, zfs_secpolicy_inject, no_name }, 1366 { zfs_ioc_inject_list_next, zfs_secpolicy_inject, no_name }, 1367 { zfs_ioc_error_log, zfs_secpolicy_inject, pool_name }, 1368 { zfs_ioc_clear, zfs_secpolicy_config, pool_name }, 1369 { zfs_ioc_bookmark_name, zfs_secpolicy_inject, pool_name }, 1370 { zfs_ioc_promote, zfs_secpolicy_write, dataset_name }, 1371 { zfs_ioc_destroy_snaps, zfs_secpolicy_write, dataset_name }, 1372 { zfs_ioc_snapshot, zfs_secpolicy_write, dataset_name } 1373 }; 1374 1375 static int 1376 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 1377 { 1378 zfs_cmd_t *zc; 1379 uint_t vec; 1380 int error, rc; 1381 1382 if (getminor(dev) != 0) 1383 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 1384 1385 vec = cmd - ZFS_IOC; 1386 1387 if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 1388 return (EINVAL); 1389 1390 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 1391 1392 error = xcopyin((void *)arg, zc, sizeof (zfs_cmd_t)); 1393 1394 if (error == 0) { 1395 zc->zc_cred = (uintptr_t)cr; 1396 zc->zc_dev = dev; 1397 error = zfs_ioc_vec[vec].zvec_secpolicy(zc->zc_name, cr); 1398 } 1399 1400 /* 1401 * Ensure that all pool/dataset names are valid before we pass down to 1402 * the lower layers. 1403 */ 1404 if (error == 0) { 1405 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 1406 switch (zfs_ioc_vec[vec].zvec_namecheck) { 1407 case pool_name: 1408 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 1409 error = EINVAL; 1410 break; 1411 1412 case dataset_name: 1413 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 1414 error = EINVAL; 1415 break; 1416 } 1417 } 1418 1419 if (error == 0) 1420 error = zfs_ioc_vec[vec].zvec_func(zc); 1421 1422 rc = xcopyout(zc, (void *)arg, sizeof (zfs_cmd_t)); 1423 if (error == 0) 1424 error = rc; 1425 1426 kmem_free(zc, sizeof (zfs_cmd_t)); 1427 return (error); 1428 } 1429 1430 static int 1431 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 1432 { 1433 if (cmd != DDI_ATTACH) 1434 return (DDI_FAILURE); 1435 1436 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 1437 DDI_PSEUDO, 0) == DDI_FAILURE) 1438 return (DDI_FAILURE); 1439 1440 zfs_dip = dip; 1441 1442 ddi_report_dev(dip); 1443 1444 return (DDI_SUCCESS); 1445 } 1446 1447 static int 1448 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 1449 { 1450 if (spa_busy() || zfs_busy() || zvol_busy()) 1451 return (DDI_FAILURE); 1452 1453 if (cmd != DDI_DETACH) 1454 return (DDI_FAILURE); 1455 1456 zfs_dip = NULL; 1457 1458 ddi_prop_remove_all(dip); 1459 ddi_remove_minor_node(dip, NULL); 1460 1461 return (DDI_SUCCESS); 1462 } 1463 1464 /*ARGSUSED*/ 1465 static int 1466 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 1467 { 1468 switch (infocmd) { 1469 case DDI_INFO_DEVT2DEVINFO: 1470 *result = zfs_dip; 1471 return (DDI_SUCCESS); 1472 1473 case DDI_INFO_DEVT2INSTANCE: 1474 *result = (void *)0; 1475 return (DDI_SUCCESS); 1476 } 1477 1478 return (DDI_FAILURE); 1479 } 1480 1481 /* 1482 * OK, so this is a little weird. 1483 * 1484 * /dev/zfs is the control node, i.e. minor 0. 1485 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 1486 * 1487 * /dev/zfs has basically nothing to do except serve up ioctls, 1488 * so most of the standard driver entry points are in zvol.c. 1489 */ 1490 static struct cb_ops zfs_cb_ops = { 1491 zvol_open, /* open */ 1492 zvol_close, /* close */ 1493 zvol_strategy, /* strategy */ 1494 nodev, /* print */ 1495 nodev, /* dump */ 1496 zvol_read, /* read */ 1497 zvol_write, /* write */ 1498 zfsdev_ioctl, /* ioctl */ 1499 nodev, /* devmap */ 1500 nodev, /* mmap */ 1501 nodev, /* segmap */ 1502 nochpoll, /* poll */ 1503 ddi_prop_op, /* prop_op */ 1504 NULL, /* streamtab */ 1505 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 1506 CB_REV, /* version */ 1507 zvol_aread, /* async read */ 1508 zvol_awrite, /* async write */ 1509 }; 1510 1511 static struct dev_ops zfs_dev_ops = { 1512 DEVO_REV, /* version */ 1513 0, /* refcnt */ 1514 zfs_info, /* info */ 1515 nulldev, /* identify */ 1516 nulldev, /* probe */ 1517 zfs_attach, /* attach */ 1518 zfs_detach, /* detach */ 1519 nodev, /* reset */ 1520 &zfs_cb_ops, /* driver operations */ 1521 NULL /* no bus operations */ 1522 }; 1523 1524 static struct modldrv zfs_modldrv = { 1525 &mod_driverops, "ZFS storage pool version " ZFS_VERSION_STRING, 1526 &zfs_dev_ops 1527 }; 1528 1529 static struct modlinkage modlinkage = { 1530 MODREV_1, 1531 (void *)&zfs_modlfs, 1532 (void *)&zfs_modldrv, 1533 NULL 1534 }; 1535 1536 int 1537 _init(void) 1538 { 1539 int error; 1540 1541 spa_init(FREAD | FWRITE); 1542 zfs_init(); 1543 zvol_init(); 1544 1545 if ((error = mod_install(&modlinkage)) != 0) { 1546 zvol_fini(); 1547 zfs_fini(); 1548 spa_fini(); 1549 return (error); 1550 } 1551 1552 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 1553 ASSERT(error == 0); 1554 1555 return (0); 1556 } 1557 1558 int 1559 _fini(void) 1560 { 1561 int error; 1562 1563 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 1564 return (EBUSY); 1565 1566 if ((error = mod_remove(&modlinkage)) != 0) 1567 return (error); 1568 1569 zvol_fini(); 1570 zfs_fini(); 1571 spa_fini(); 1572 1573 ldi_ident_release(zfs_li); 1574 zfs_li = NULL; 1575 1576 return (error); 1577 } 1578 1579 int 1580 _info(struct modinfo *modinfop) 1581 { 1582 return (mod_info(&modlinkage, modinfop)); 1583 } 1584