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 2007 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/spa_impl.h> 44 #include <sys/vdev.h> 45 #include <sys/vdev_impl.h> 46 #include <sys/dmu.h> 47 #include <sys/dsl_dir.h> 48 #include <sys/dsl_dataset.h> 49 #include <sys/dsl_prop.h> 50 #include <sys/dsl_deleg.h> 51 #include <sys/dmu_objset.h> 52 #include <sys/ddi.h> 53 #include <sys/sunddi.h> 54 #include <sys/sunldi.h> 55 #include <sys/policy.h> 56 #include <sys/zone.h> 57 #include <sys/nvpair.h> 58 #include <sys/pathname.h> 59 #include <sys/mount.h> 60 #include <sys/sdt.h> 61 #include <sys/fs/zfs.h> 62 #include <sys/zfs_ctldir.h> 63 #include <sys/zvol.h> 64 #include <sharefs/share.h> 65 #include <sys/zfs_znode.h> 66 67 #include "zfs_namecheck.h" 68 #include "zfs_prop.h" 69 #include "zfs_deleg.h" 70 71 extern struct modlfs zfs_modlfs; 72 73 extern void zfs_init(void); 74 extern void zfs_fini(void); 75 76 ldi_ident_t zfs_li = NULL; 77 dev_info_t *zfs_dip; 78 79 typedef int zfs_ioc_func_t(zfs_cmd_t *); 80 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, cred_t *); 81 82 typedef struct zfs_ioc_vec { 83 zfs_ioc_func_t *zvec_func; 84 zfs_secpolicy_func_t *zvec_secpolicy; 85 enum { 86 NO_NAME, 87 POOL_NAME, 88 DATASET_NAME 89 } zvec_namecheck; 90 boolean_t zvec_his_log; 91 } zfs_ioc_vec_t; 92 93 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ 94 void 95 __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 96 { 97 const char *newfile; 98 char buf[256]; 99 va_list adx; 100 101 /* 102 * Get rid of annoying "../common/" prefix to filename. 103 */ 104 newfile = strrchr(file, '/'); 105 if (newfile != NULL) { 106 newfile = newfile + 1; /* Get rid of leading / */ 107 } else { 108 newfile = file; 109 } 110 111 va_start(adx, fmt); 112 (void) vsnprintf(buf, sizeof (buf), fmt, adx); 113 va_end(adx); 114 115 /* 116 * To get this data, use the zfs-dprintf probe as so: 117 * dtrace -q -n 'zfs-dprintf \ 118 * /stringof(arg0) == "dbuf.c"/ \ 119 * {printf("%s: %s", stringof(arg1), stringof(arg3))}' 120 * arg0 = file name 121 * arg1 = function name 122 * arg2 = line number 123 * arg3 = message 124 */ 125 DTRACE_PROBE4(zfs__dprintf, 126 char *, newfile, char *, func, int, line, char *, buf); 127 } 128 129 static void 130 history_str_free(char *buf) 131 { 132 kmem_free(buf, HIS_MAX_RECORD_LEN); 133 } 134 135 static char * 136 history_str_get(zfs_cmd_t *zc) 137 { 138 char *buf; 139 140 if (zc->zc_history == NULL) 141 return (NULL); 142 143 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); 144 if (copyinstr((void *)(uintptr_t)zc->zc_history, 145 buf, HIS_MAX_RECORD_LEN, NULL) != 0) { 146 history_str_free(buf); 147 return (NULL); 148 } 149 150 buf[HIS_MAX_RECORD_LEN -1] = '\0'; 151 152 return (buf); 153 } 154 155 static void 156 zfs_log_history(zfs_cmd_t *zc) 157 { 158 spa_t *spa; 159 char *buf; 160 161 if ((buf = history_str_get(zc)) == NULL) 162 return; 163 164 if (spa_open(zc->zc_name, &spa, FTAG) == 0) { 165 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) 166 (void) spa_history_log(spa, buf, LOG_CMD_NORMAL); 167 spa_close(spa, FTAG); 168 } 169 history_str_free(buf); 170 } 171 172 /* 173 * Policy for top-level read operations (list pools). Requires no privileges, 174 * and can be used in the local zone, as there is no associated dataset. 175 */ 176 /* ARGSUSED */ 177 static int 178 zfs_secpolicy_none(zfs_cmd_t *zc, cred_t *cr) 179 { 180 return (0); 181 } 182 183 /* 184 * Policy for dataset read operations (list children, get statistics). Requires 185 * no privileges, but must be visible in the local zone. 186 */ 187 /* ARGSUSED */ 188 static int 189 zfs_secpolicy_read(zfs_cmd_t *zc, cred_t *cr) 190 { 191 if (INGLOBALZONE(curproc) || 192 zone_dataset_visible(zc->zc_name, NULL)) 193 return (0); 194 195 return (ENOENT); 196 } 197 198 static int 199 zfs_dozonecheck(const char *dataset, cred_t *cr) 200 { 201 uint64_t zoned; 202 int writable = 1; 203 204 /* 205 * The dataset must be visible by this zone -- check this first 206 * so they don't see EPERM on something they shouldn't know about. 207 */ 208 if (!INGLOBALZONE(curproc) && 209 !zone_dataset_visible(dataset, &writable)) 210 return (ENOENT); 211 212 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL)) 213 return (ENOENT); 214 215 if (INGLOBALZONE(curproc)) { 216 /* 217 * If the fs is zoned, only root can access it from the 218 * global zone. 219 */ 220 if (secpolicy_zfs(cr) && zoned) 221 return (EPERM); 222 } else { 223 /* 224 * If we are in a local zone, the 'zoned' property must be set. 225 */ 226 if (!zoned) 227 return (EPERM); 228 229 /* must be writable by this zone */ 230 if (!writable) 231 return (EPERM); 232 } 233 return (0); 234 } 235 236 int 237 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) 238 { 239 int error; 240 241 error = zfs_dozonecheck(name, cr); 242 if (error == 0) { 243 error = secpolicy_zfs(cr); 244 if (error) 245 error = dsl_deleg_access(name, perm, cr); 246 } 247 return (error); 248 } 249 250 static int 251 zfs_secpolicy_setprop(const char *name, zfs_prop_t prop, cred_t *cr) 252 { 253 /* 254 * Check permissions for special properties. 255 */ 256 switch (prop) { 257 case ZFS_PROP_ZONED: 258 /* 259 * Disallow setting of 'zoned' from within a local zone. 260 */ 261 if (!INGLOBALZONE(curproc)) 262 return (EPERM); 263 break; 264 265 case ZFS_PROP_QUOTA: 266 if (!INGLOBALZONE(curproc)) { 267 uint64_t zoned; 268 char setpoint[MAXNAMELEN]; 269 /* 270 * Unprivileged users are allowed to modify the 271 * quota on things *under* (ie. contained by) 272 * the thing they own. 273 */ 274 if (dsl_prop_get_integer(name, "zoned", &zoned, 275 setpoint)) 276 return (EPERM); 277 if (!zoned || strlen(name) <= strlen(setpoint)) 278 return (EPERM); 279 } 280 break; 281 } 282 283 return (zfs_secpolicy_write_perms(name, zfs_prop_to_name(prop), cr)); 284 } 285 286 int 287 zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr) 288 { 289 int error; 290 291 error = zfs_dozonecheck(zc->zc_name, cr); 292 if (error) 293 return (error); 294 295 /* 296 * permission to set permissions will be evaluated later in 297 * dsl_deleg_can_allow() 298 */ 299 return (0); 300 } 301 302 int 303 zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr) 304 { 305 int error; 306 error = zfs_secpolicy_write_perms(zc->zc_name, 307 ZFS_DELEG_PERM_ROLLBACK, cr); 308 if (error == 0) 309 error = zfs_secpolicy_write_perms(zc->zc_name, 310 ZFS_DELEG_PERM_MOUNT, cr); 311 return (error); 312 } 313 314 int 315 zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr) 316 { 317 return (zfs_secpolicy_write_perms(zc->zc_name, 318 ZFS_DELEG_PERM_SEND, cr)); 319 } 320 321 int 322 zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr) 323 { 324 if (!INGLOBALZONE(curproc)) 325 return (EPERM); 326 327 if (secpolicy_nfs(CRED()) == 0) { 328 return (0); 329 } else { 330 vnode_t *vp; 331 int error; 332 333 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 334 NO_FOLLOW, NULL, &vp)) != 0) 335 return (error); 336 337 /* Now make sure mntpnt and dataset are ZFS */ 338 339 if (vp->v_vfsp->vfs_fstype != zfsfstype || 340 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 341 zc->zc_name) != 0)) { 342 VN_RELE(vp); 343 return (EPERM); 344 } 345 346 VN_RELE(vp); 347 return (dsl_deleg_access(zc->zc_name, 348 ZFS_DELEG_PERM_SHARE, cr)); 349 } 350 } 351 352 static int 353 zfs_get_parent(const char *datasetname, char *parent, int parentsize) 354 { 355 char *cp; 356 357 /* 358 * Remove the @bla or /bla from the end of the name to get the parent. 359 */ 360 (void) strncpy(parent, datasetname, parentsize); 361 cp = strrchr(parent, '@'); 362 if (cp != NULL) { 363 cp[0] = '\0'; 364 } else { 365 cp = strrchr(parent, '/'); 366 if (cp == NULL) 367 return (ENOENT); 368 cp[0] = '\0'; 369 } 370 371 return (0); 372 } 373 374 int 375 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 376 { 377 int error; 378 379 if ((error = zfs_secpolicy_write_perms(name, 380 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 381 return (error); 382 383 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); 384 } 385 386 static int 387 zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr) 388 { 389 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); 390 } 391 392 /* 393 * Must have sys_config privilege to check the iscsi permission 394 */ 395 /* ARGSUSED */ 396 static int 397 zfs_secpolicy_iscsi(zfs_cmd_t *zc, cred_t *cr) 398 { 399 return (secpolicy_zfs(cr)); 400 } 401 402 int 403 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 404 { 405 char parentname[MAXNAMELEN]; 406 int error; 407 408 if ((error = zfs_secpolicy_write_perms(from, 409 ZFS_DELEG_PERM_RENAME, cr)) != 0) 410 return (error); 411 412 if ((error = zfs_secpolicy_write_perms(from, 413 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 414 return (error); 415 416 if ((error = zfs_get_parent(to, parentname, 417 sizeof (parentname))) != 0) 418 return (error); 419 420 if ((error = zfs_secpolicy_write_perms(parentname, 421 ZFS_DELEG_PERM_CREATE, cr)) != 0) 422 return (error); 423 424 if ((error = zfs_secpolicy_write_perms(parentname, 425 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 426 return (error); 427 428 return (error); 429 } 430 431 static int 432 zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr) 433 { 434 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); 435 } 436 437 static int 438 zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr) 439 { 440 char parentname[MAXNAMELEN]; 441 objset_t *clone; 442 int error; 443 444 error = zfs_secpolicy_write_perms(zc->zc_name, 445 ZFS_DELEG_PERM_PROMOTE, cr); 446 if (error) 447 return (error); 448 449 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 450 DS_MODE_STANDARD | DS_MODE_READONLY, &clone); 451 452 if (error == 0) { 453 dsl_dataset_t *pclone = NULL; 454 dsl_dir_t *dd; 455 dd = clone->os->os_dsl_dataset->ds_dir; 456 457 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); 458 error = dsl_dataset_open_obj(dd->dd_pool, 459 dd->dd_phys->dd_clone_parent_obj, NULL, 460 DS_MODE_NONE, FTAG, &pclone); 461 rw_exit(&dd->dd_pool->dp_config_rwlock); 462 if (error) { 463 dmu_objset_close(clone); 464 return (error); 465 } 466 467 error = zfs_secpolicy_write_perms(zc->zc_name, 468 ZFS_DELEG_PERM_MOUNT, cr); 469 470 dsl_dataset_name(pclone, parentname); 471 dmu_objset_close(clone); 472 dsl_dataset_close(pclone, DS_MODE_NONE, FTAG); 473 if (error == 0) 474 error = zfs_secpolicy_write_perms(parentname, 475 ZFS_DELEG_PERM_PROMOTE, cr); 476 } 477 return (error); 478 } 479 480 static int 481 zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr) 482 { 483 int error; 484 485 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 486 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 487 return (error); 488 489 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 490 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 491 return (error); 492 493 return (zfs_secpolicy_write_perms(zc->zc_name, 494 ZFS_DELEG_PERM_CREATE, cr)); 495 } 496 497 int 498 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 499 { 500 int error; 501 502 if ((error = zfs_secpolicy_write_perms(name, 503 ZFS_DELEG_PERM_SNAPSHOT, cr)) != 0) 504 return (error); 505 506 error = zfs_secpolicy_write_perms(name, 507 ZFS_DELEG_PERM_MOUNT, cr); 508 509 return (error); 510 } 511 512 static int 513 zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr) 514 { 515 516 return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr)); 517 } 518 519 static int 520 zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr) 521 { 522 char parentname[MAXNAMELEN]; 523 int error; 524 525 if ((error = zfs_get_parent(zc->zc_name, parentname, 526 sizeof (parentname))) != 0) 527 return (error); 528 529 if (zc->zc_value[0] != '\0') { 530 if ((error = zfs_secpolicy_write_perms(zc->zc_value, 531 ZFS_DELEG_PERM_CLONE, cr)) != 0) 532 return (error); 533 } 534 535 if ((error = zfs_secpolicy_write_perms(parentname, 536 ZFS_DELEG_PERM_CREATE, cr)) != 0) 537 return (error); 538 539 error = zfs_secpolicy_write_perms(parentname, 540 ZFS_DELEG_PERM_MOUNT, cr); 541 542 return (error); 543 } 544 545 static int 546 zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr) 547 { 548 int error; 549 550 error = secpolicy_fs_unmount(cr, NULL); 551 if (error) { 552 error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr); 553 } 554 return (error); 555 } 556 557 /* 558 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 559 * SYS_CONFIG privilege, which is not available in a local zone. 560 */ 561 /* ARGSUSED */ 562 static int 563 zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr) 564 { 565 if (secpolicy_sys_config(cr, B_FALSE) != 0) 566 return (EPERM); 567 568 return (0); 569 } 570 571 /* 572 * Just like zfs_secpolicy_config, except that we will check for 573 * mount permission on the dataset for permission to create/remove 574 * the minor nodes. 575 */ 576 static int 577 zfs_secpolicy_minor(zfs_cmd_t *zc, cred_t *cr) 578 { 579 if (secpolicy_sys_config(cr, B_FALSE) != 0) { 580 return (dsl_deleg_access(zc->zc_name, 581 ZFS_DELEG_PERM_MOUNT, cr)); 582 } 583 584 return (0); 585 } 586 587 /* 588 * Policy for fault injection. Requires all privileges. 589 */ 590 /* ARGSUSED */ 591 static int 592 zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr) 593 { 594 return (secpolicy_zinject(cr)); 595 } 596 597 static int 598 zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr) 599 { 600 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 601 602 if (prop == ZPROP_INVAL) { 603 if (!zfs_prop_user(zc->zc_value)) 604 return (EINVAL); 605 return (zfs_secpolicy_write_perms(zc->zc_name, 606 ZFS_DELEG_PERM_USERPROP, cr)); 607 } else { 608 if (!zfs_prop_inheritable(prop)) 609 return (EINVAL); 610 return (zfs_secpolicy_setprop(zc->zc_name, prop, cr)); 611 } 612 } 613 614 /* 615 * Returns the nvlist as specified by the user in the zfs_cmd_t. 616 */ 617 static int 618 get_nvlist(uint64_t nvl, uint64_t size, nvlist_t **nvp) 619 { 620 char *packed; 621 int error; 622 nvlist_t *list = NULL; 623 624 /* 625 * Read in and unpack the user-supplied nvlist. 626 */ 627 if (size == 0) 628 return (EINVAL); 629 630 packed = kmem_alloc(size, KM_SLEEP); 631 632 if ((error = xcopyin((void *)(uintptr_t)nvl, packed, size)) != 0) { 633 kmem_free(packed, size); 634 return (error); 635 } 636 637 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 638 kmem_free(packed, size); 639 return (error); 640 } 641 642 kmem_free(packed, size); 643 644 *nvp = list; 645 return (0); 646 } 647 648 static int 649 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 650 { 651 char *packed = NULL; 652 size_t size; 653 int error; 654 655 VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0); 656 657 if (size > zc->zc_nvlist_dst_size) { 658 error = ENOMEM; 659 } else { 660 packed = kmem_alloc(size, KM_SLEEP); 661 VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE, 662 KM_SLEEP) == 0); 663 error = xcopyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 664 size); 665 kmem_free(packed, size); 666 } 667 668 zc->zc_nvlist_dst_size = size; 669 return (error); 670 } 671 672 static int 673 zfs_ioc_pool_create(zfs_cmd_t *zc) 674 { 675 int error; 676 nvlist_t *config, *props = NULL; 677 char *buf; 678 679 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 680 &config)) 681 return (error); 682 683 if (zc->zc_nvlist_src_size != 0 && (error = 684 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, &props))) { 685 nvlist_free(config); 686 return (error); 687 } 688 689 buf = history_str_get(zc); 690 691 error = spa_create(zc->zc_name, config, props, buf); 692 693 if (buf != NULL) 694 history_str_free(buf); 695 696 nvlist_free(config); 697 698 if (props) 699 nvlist_free(props); 700 701 return (error); 702 } 703 704 static int 705 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 706 { 707 int error; 708 zfs_log_history(zc); 709 error = spa_destroy(zc->zc_name); 710 return (error); 711 } 712 713 static int 714 zfs_ioc_pool_import(zfs_cmd_t *zc) 715 { 716 int error; 717 nvlist_t *config, *props = NULL; 718 uint64_t guid; 719 720 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 721 &config)) != 0) 722 return (error); 723 724 if (zc->zc_nvlist_src_size != 0 && (error = 725 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, &props))) { 726 nvlist_free(config); 727 return (error); 728 } 729 730 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 731 guid != zc->zc_guid) 732 error = EINVAL; 733 else 734 error = spa_import(zc->zc_name, config, props); 735 736 nvlist_free(config); 737 738 if (props) 739 nvlist_free(props); 740 741 return (error); 742 } 743 744 static int 745 zfs_ioc_pool_export(zfs_cmd_t *zc) 746 { 747 int error; 748 zfs_log_history(zc); 749 error = spa_export(zc->zc_name, NULL); 750 return (error); 751 } 752 753 static int 754 zfs_ioc_pool_configs(zfs_cmd_t *zc) 755 { 756 nvlist_t *configs; 757 int error; 758 759 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 760 return (EEXIST); 761 762 error = put_nvlist(zc, configs); 763 764 nvlist_free(configs); 765 766 return (error); 767 } 768 769 static int 770 zfs_ioc_pool_stats(zfs_cmd_t *zc) 771 { 772 nvlist_t *config; 773 int error; 774 int ret = 0; 775 776 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 777 sizeof (zc->zc_value)); 778 779 if (config != NULL) { 780 ret = put_nvlist(zc, config); 781 nvlist_free(config); 782 783 /* 784 * The config may be present even if 'error' is non-zero. 785 * In this case we return success, and preserve the real errno 786 * in 'zc_cookie'. 787 */ 788 zc->zc_cookie = error; 789 } else { 790 ret = error; 791 } 792 793 return (ret); 794 } 795 796 /* 797 * Try to import the given pool, returning pool stats as appropriate so that 798 * user land knows which devices are available and overall pool health. 799 */ 800 static int 801 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 802 { 803 nvlist_t *tryconfig, *config; 804 int error; 805 806 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 807 &tryconfig)) != 0) 808 return (error); 809 810 config = spa_tryimport(tryconfig); 811 812 nvlist_free(tryconfig); 813 814 if (config == NULL) 815 return (EINVAL); 816 817 error = put_nvlist(zc, config); 818 nvlist_free(config); 819 820 return (error); 821 } 822 823 static int 824 zfs_ioc_pool_scrub(zfs_cmd_t *zc) 825 { 826 spa_t *spa; 827 int error; 828 829 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 830 return (error); 831 832 mutex_enter(&spa_namespace_lock); 833 error = spa_scrub(spa, zc->zc_cookie, B_FALSE); 834 mutex_exit(&spa_namespace_lock); 835 836 spa_close(spa, FTAG); 837 838 return (error); 839 } 840 841 static int 842 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 843 { 844 spa_t *spa; 845 int error; 846 847 error = spa_open(zc->zc_name, &spa, FTAG); 848 if (error == 0) { 849 spa_freeze(spa); 850 spa_close(spa, FTAG); 851 } 852 return (error); 853 } 854 855 static int 856 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 857 { 858 spa_t *spa; 859 int error; 860 861 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 862 return (error); 863 864 if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) { 865 spa_close(spa, FTAG); 866 return (EINVAL); 867 } 868 869 spa_upgrade(spa, zc->zc_cookie); 870 spa_close(spa, FTAG); 871 872 return (error); 873 } 874 875 static int 876 zfs_ioc_pool_get_history(zfs_cmd_t *zc) 877 { 878 spa_t *spa; 879 char *hist_buf; 880 uint64_t size; 881 int error; 882 883 if ((size = zc->zc_history_len) == 0) 884 return (EINVAL); 885 886 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 887 return (error); 888 889 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 890 spa_close(spa, FTAG); 891 return (ENOTSUP); 892 } 893 894 hist_buf = kmem_alloc(size, KM_SLEEP); 895 if ((error = spa_history_get(spa, &zc->zc_history_offset, 896 &zc->zc_history_len, hist_buf)) == 0) { 897 error = xcopyout(hist_buf, 898 (char *)(uintptr_t)zc->zc_history, 899 zc->zc_history_len); 900 } 901 902 spa_close(spa, FTAG); 903 kmem_free(hist_buf, size); 904 return (error); 905 } 906 907 static int 908 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 909 { 910 int error; 911 912 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)) 913 return (error); 914 915 return (0); 916 } 917 918 static int 919 zfs_ioc_obj_to_path(zfs_cmd_t *zc) 920 { 921 objset_t *osp; 922 int error; 923 924 if ((error = dmu_objset_open(zc->zc_name, DMU_OST_ZFS, 925 DS_MODE_NONE | DS_MODE_READONLY, &osp)) != 0) 926 return (error); 927 928 error = zfs_obj_to_path(osp, zc->zc_obj, zc->zc_value, 929 sizeof (zc->zc_value)); 930 dmu_objset_close(osp); 931 932 return (error); 933 } 934 935 static int 936 zfs_ioc_vdev_add(zfs_cmd_t *zc) 937 { 938 spa_t *spa; 939 int error; 940 nvlist_t *config; 941 942 error = spa_open(zc->zc_name, &spa, FTAG); 943 if (error != 0) 944 return (error); 945 946 /* 947 * A root pool with concatenated devices is not supported. 948 * Thus, can not add a device to a root pool with one device. 949 */ 950 if (spa->spa_root_vdev->vdev_children == 1 && spa->spa_bootfs != 0) { 951 spa_close(spa, FTAG); 952 return (EDOM); 953 } 954 955 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 956 &config)) == 0) { 957 error = spa_vdev_add(spa, config); 958 nvlist_free(config); 959 } 960 spa_close(spa, FTAG); 961 return (error); 962 } 963 964 static int 965 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 966 { 967 spa_t *spa; 968 int error; 969 970 error = spa_open(zc->zc_name, &spa, FTAG); 971 if (error != 0) 972 return (error); 973 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 974 spa_close(spa, FTAG); 975 return (error); 976 } 977 978 static int 979 zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 980 { 981 spa_t *spa; 982 int error; 983 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 984 985 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 986 return (error); 987 switch (zc->zc_cookie) { 988 case VDEV_STATE_ONLINE: 989 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 990 break; 991 992 case VDEV_STATE_OFFLINE: 993 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 994 break; 995 996 case VDEV_STATE_FAULTED: 997 error = vdev_fault(spa, zc->zc_guid); 998 break; 999 1000 case VDEV_STATE_DEGRADED: 1001 error = vdev_degrade(spa, zc->zc_guid); 1002 break; 1003 1004 default: 1005 error = EINVAL; 1006 } 1007 zc->zc_cookie = newstate; 1008 spa_close(spa, FTAG); 1009 return (error); 1010 } 1011 1012 static int 1013 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1014 { 1015 spa_t *spa; 1016 int replacing = zc->zc_cookie; 1017 nvlist_t *config; 1018 int error; 1019 1020 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1021 return (error); 1022 1023 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1024 &config)) == 0) { 1025 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 1026 nvlist_free(config); 1027 } 1028 1029 spa_close(spa, FTAG); 1030 return (error); 1031 } 1032 1033 static int 1034 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 1035 { 1036 spa_t *spa; 1037 int error; 1038 1039 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1040 return (error); 1041 1042 error = spa_vdev_detach(spa, zc->zc_guid, B_FALSE); 1043 1044 spa_close(spa, FTAG); 1045 return (error); 1046 } 1047 1048 static int 1049 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 1050 { 1051 spa_t *spa; 1052 char *path = zc->zc_value; 1053 uint64_t guid = zc->zc_guid; 1054 int error; 1055 1056 error = spa_open(zc->zc_name, &spa, FTAG); 1057 if (error != 0) 1058 return (error); 1059 1060 error = spa_vdev_setpath(spa, guid, path); 1061 spa_close(spa, FTAG); 1062 return (error); 1063 } 1064 1065 static int 1066 zfs_ioc_objset_stats(zfs_cmd_t *zc) 1067 { 1068 objset_t *os = NULL; 1069 int error; 1070 nvlist_t *nv; 1071 1072 retry: 1073 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 1074 DS_MODE_STANDARD | DS_MODE_READONLY, &os); 1075 if (error != 0) { 1076 /* 1077 * This is ugly: dmu_objset_open() can return EBUSY if 1078 * the objset is held exclusively. Fortunately this hold is 1079 * only for a short while, so we retry here. 1080 * This avoids user code having to handle EBUSY, 1081 * for example for a "zfs list". 1082 */ 1083 if (error == EBUSY) { 1084 delay(1); 1085 goto retry; 1086 } 1087 return (error); 1088 } 1089 1090 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 1091 1092 if (zc->zc_nvlist_dst != 0 && 1093 (error = dsl_prop_get_all(os, &nv)) == 0) { 1094 dmu_objset_stats(os, nv); 1095 /* 1096 * NB: {zpl,zvol}_get_stats() will read the objset contents, 1097 * which we aren't supposed to do with a 1098 * DS_MODE_STANDARD open, because it could be 1099 * inconsistent. So this is a bit of a workaround... 1100 */ 1101 if (!zc->zc_objset_stats.dds_inconsistent) { 1102 if (dmu_objset_type(os) == DMU_OST_ZVOL) 1103 VERIFY(zvol_get_stats(os, nv) == 0); 1104 else if (dmu_objset_type(os) == DMU_OST_ZFS) 1105 (void) zfs_get_stats(os, nv); 1106 } 1107 error = put_nvlist(zc, nv); 1108 nvlist_free(nv); 1109 } 1110 1111 spa_altroot(dmu_objset_spa(os), zc->zc_value, sizeof (zc->zc_value)); 1112 1113 dmu_objset_close(os); 1114 return (error); 1115 } 1116 1117 static int 1118 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 1119 { 1120 objset_t *os; 1121 int error; 1122 char *p; 1123 1124 retry: 1125 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 1126 DS_MODE_STANDARD | DS_MODE_READONLY, &os); 1127 if (error != 0) { 1128 /* 1129 * This is ugly: dmu_objset_open() can return EBUSY if 1130 * the objset is held exclusively. Fortunately this hold is 1131 * only for a short while, so we retry here. 1132 * This avoids user code having to handle EBUSY, 1133 * for example for a "zfs list". 1134 */ 1135 if (error == EBUSY) { 1136 delay(1); 1137 goto retry; 1138 } 1139 if (error == ENOENT) 1140 error = ESRCH; 1141 return (error); 1142 } 1143 1144 p = strrchr(zc->zc_name, '/'); 1145 if (p == NULL || p[1] != '\0') 1146 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 1147 p = zc->zc_name + strlen(zc->zc_name); 1148 1149 do { 1150 error = dmu_dir_list_next(os, 1151 sizeof (zc->zc_name) - (p - zc->zc_name), p, 1152 NULL, &zc->zc_cookie); 1153 if (error == ENOENT) 1154 error = ESRCH; 1155 } while (error == 0 && !INGLOBALZONE(curproc) && 1156 !zone_dataset_visible(zc->zc_name, NULL)); 1157 1158 /* 1159 * If it's a hidden dataset (ie. with a '$' in its name), don't 1160 * try to get stats for it. Userland will skip over it. 1161 */ 1162 if (error == 0 && strchr(zc->zc_name, '$') == NULL) 1163 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 1164 1165 dmu_objset_close(os); 1166 return (error); 1167 } 1168 1169 static int 1170 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 1171 { 1172 objset_t *os; 1173 int error; 1174 1175 retry: 1176 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 1177 DS_MODE_STANDARD | DS_MODE_READONLY, &os); 1178 if (error != 0) { 1179 /* 1180 * This is ugly: dmu_objset_open() can return EBUSY if 1181 * the objset is held exclusively. Fortunately this hold is 1182 * only for a short while, so we retry here. 1183 * This avoids user code having to handle EBUSY, 1184 * for example for a "zfs list". 1185 */ 1186 if (error == EBUSY) { 1187 delay(1); 1188 goto retry; 1189 } 1190 if (error == ENOENT) 1191 error = ESRCH; 1192 return (error); 1193 } 1194 1195 /* 1196 * A dataset name of maximum length cannot have any snapshots, 1197 * so exit immediately. 1198 */ 1199 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 1200 dmu_objset_close(os); 1201 return (ESRCH); 1202 } 1203 1204 error = dmu_snapshot_list_next(os, 1205 sizeof (zc->zc_name) - strlen(zc->zc_name), 1206 zc->zc_name + strlen(zc->zc_name), NULL, &zc->zc_cookie); 1207 if (error == ENOENT) 1208 error = ESRCH; 1209 1210 if (error == 0) 1211 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 1212 1213 dmu_objset_close(os); 1214 return (error); 1215 } 1216 1217 static int 1218 zfs_set_prop_nvlist(const char *name, nvlist_t *nvl) 1219 { 1220 nvpair_t *elem; 1221 int error; 1222 uint64_t intval; 1223 char *strval; 1224 1225 /* 1226 * First validate permission to set all of the properties 1227 */ 1228 elem = NULL; 1229 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 1230 const char *propname = nvpair_name(elem); 1231 zfs_prop_t prop = zfs_name_to_prop(propname); 1232 1233 if (prop == ZPROP_INVAL) { 1234 /* 1235 * If this is a user-defined property, it must be a 1236 * string, and there is no further validation to do. 1237 */ 1238 if (!zfs_prop_user(propname) || 1239 nvpair_type(elem) != DATA_TYPE_STRING) 1240 return (EINVAL); 1241 1242 error = zfs_secpolicy_write_perms(name, 1243 ZFS_DELEG_PERM_USERPROP, CRED()); 1244 if (error) 1245 return (error); 1246 continue; 1247 } 1248 1249 if ((error = zfs_secpolicy_setprop(name, prop, CRED())) != 0) 1250 return (error); 1251 1252 /* 1253 * Check that this value is valid for this pool version 1254 */ 1255 switch (prop) { 1256 case ZFS_PROP_COMPRESSION: 1257 /* 1258 * If the user specified gzip compression, make sure 1259 * the SPA supports it. We ignore any errors here since 1260 * we'll catch them later. 1261 */ 1262 if (nvpair_type(elem) == DATA_TYPE_UINT64 && 1263 nvpair_value_uint64(elem, &intval) == 0 && 1264 intval >= ZIO_COMPRESS_GZIP_1 && 1265 intval <= ZIO_COMPRESS_GZIP_9) { 1266 spa_t *spa; 1267 1268 if (spa_open(name, &spa, FTAG) == 0) { 1269 if (spa_version(spa) < 1270 SPA_VERSION_GZIP_COMPRESSION) { 1271 spa_close(spa, FTAG); 1272 return (ENOTSUP); 1273 } 1274 1275 spa_close(spa, FTAG); 1276 } 1277 } 1278 break; 1279 1280 case ZFS_PROP_COPIES: 1281 { 1282 spa_t *spa; 1283 1284 if (spa_open(name, &spa, FTAG) == 0) { 1285 if (spa_version(spa) < 1286 SPA_VERSION_DITTO_BLOCKS) { 1287 spa_close(spa, FTAG); 1288 return (ENOTSUP); 1289 } 1290 spa_close(spa, FTAG); 1291 } 1292 break; 1293 } 1294 } 1295 } 1296 1297 elem = NULL; 1298 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 1299 const char *propname = nvpair_name(elem); 1300 zfs_prop_t prop = zfs_name_to_prop(propname); 1301 1302 if (prop == ZPROP_INVAL) { 1303 VERIFY(nvpair_value_string(elem, &strval) == 0); 1304 error = dsl_prop_set(name, propname, 1, 1305 strlen(strval) + 1, strval); 1306 if (error == 0) 1307 continue; 1308 else 1309 return (error); 1310 } 1311 1312 switch (prop) { 1313 case ZFS_PROP_QUOTA: 1314 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 1315 (error = dsl_dir_set_quota(name, intval)) != 0) 1316 return (error); 1317 break; 1318 1319 case ZFS_PROP_RESERVATION: 1320 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 1321 (error = dsl_dir_set_reservation(name, 1322 intval)) != 0) 1323 return (error); 1324 break; 1325 1326 case ZFS_PROP_VOLSIZE: 1327 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 1328 (error = zvol_set_volsize(name, 1329 ddi_driver_major(zfs_dip), intval)) != 0) 1330 return (error); 1331 break; 1332 1333 case ZFS_PROP_VOLBLOCKSIZE: 1334 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 1335 (error = zvol_set_volblocksize(name, intval)) != 0) 1336 return (error); 1337 break; 1338 1339 case ZFS_PROP_VERSION: 1340 if ((error = nvpair_value_uint64(elem, &intval)) != 0 || 1341 (error = zfs_set_version(name, intval)) != 0) 1342 return (error); 1343 break; 1344 1345 default: 1346 if (nvpair_type(elem) == DATA_TYPE_STRING) { 1347 if (zfs_prop_get_type(prop) != 1348 PROP_TYPE_STRING) 1349 return (EINVAL); 1350 VERIFY(nvpair_value_string(elem, &strval) == 0); 1351 if ((error = dsl_prop_set(name, 1352 nvpair_name(elem), 1, strlen(strval) + 1, 1353 strval)) != 0) 1354 return (error); 1355 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 1356 const char *unused; 1357 1358 VERIFY(nvpair_value_uint64(elem, &intval) == 0); 1359 1360 switch (zfs_prop_get_type(prop)) { 1361 case PROP_TYPE_NUMBER: 1362 break; 1363 case PROP_TYPE_STRING: 1364 return (EINVAL); 1365 case PROP_TYPE_INDEX: 1366 if (zfs_prop_index_to_string(prop, 1367 intval, &unused) != 0) 1368 return (EINVAL); 1369 break; 1370 default: 1371 cmn_err(CE_PANIC, 1372 "unknown property type"); 1373 break; 1374 } 1375 1376 if ((error = dsl_prop_set(name, propname, 1377 8, 1, &intval)) != 0) 1378 return (error); 1379 } else { 1380 return (EINVAL); 1381 } 1382 break; 1383 } 1384 } 1385 1386 return (0); 1387 } 1388 1389 static int 1390 zfs_ioc_set_prop(zfs_cmd_t *zc) 1391 { 1392 nvlist_t *nvl; 1393 int error; 1394 1395 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1396 &nvl)) != 0) 1397 return (error); 1398 1399 error = zfs_set_prop_nvlist(zc->zc_name, nvl); 1400 1401 nvlist_free(nvl); 1402 return (error); 1403 } 1404 1405 static int 1406 zfs_ioc_inherit_prop(zfs_cmd_t *zc) 1407 { 1408 /* the property name has been validated by zfs_secpolicy_inherit() */ 1409 return (dsl_prop_set(zc->zc_name, zc->zc_value, 0, 0, NULL)); 1410 } 1411 1412 static int 1413 zfs_ioc_pool_set_props(zfs_cmd_t *zc) 1414 { 1415 nvlist_t *props; 1416 spa_t *spa; 1417 int error; 1418 1419 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1420 &props))) 1421 return (error); 1422 1423 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 1424 nvlist_free(props); 1425 return (error); 1426 } 1427 1428 error = spa_prop_set(spa, props); 1429 1430 nvlist_free(props); 1431 spa_close(spa, FTAG); 1432 1433 return (error); 1434 } 1435 1436 static int 1437 zfs_ioc_pool_get_props(zfs_cmd_t *zc) 1438 { 1439 spa_t *spa; 1440 int error; 1441 nvlist_t *nvp = NULL; 1442 1443 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1444 return (error); 1445 1446 error = spa_prop_get(spa, &nvp); 1447 1448 if (error == 0 && zc->zc_nvlist_dst != NULL) 1449 error = put_nvlist(zc, nvp); 1450 else 1451 error = EFAULT; 1452 1453 spa_close(spa, FTAG); 1454 1455 if (nvp) 1456 nvlist_free(nvp); 1457 return (error); 1458 } 1459 1460 static int 1461 zfs_ioc_iscsi_perm_check(zfs_cmd_t *zc) 1462 { 1463 nvlist_t *nvp; 1464 int error; 1465 uint32_t uid; 1466 uint32_t gid; 1467 uint32_t *groups; 1468 uint_t group_cnt; 1469 cred_t *usercred; 1470 1471 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1472 &nvp)) != 0) { 1473 return (error); 1474 } 1475 1476 if ((error = nvlist_lookup_uint32(nvp, 1477 ZFS_DELEG_PERM_UID, &uid)) != 0) { 1478 nvlist_free(nvp); 1479 return (EPERM); 1480 } 1481 1482 if ((error = nvlist_lookup_uint32(nvp, 1483 ZFS_DELEG_PERM_GID, &gid)) != 0) { 1484 nvlist_free(nvp); 1485 return (EPERM); 1486 } 1487 1488 if ((error = nvlist_lookup_uint32_array(nvp, ZFS_DELEG_PERM_GROUPS, 1489 &groups, &group_cnt)) != 0) { 1490 nvlist_free(nvp); 1491 return (EPERM); 1492 } 1493 usercred = cralloc(); 1494 if ((crsetugid(usercred, uid, gid) != 0) || 1495 (crsetgroups(usercred, group_cnt, (gid_t *)groups) != 0)) { 1496 nvlist_free(nvp); 1497 crfree(usercred); 1498 return (EPERM); 1499 } 1500 nvlist_free(nvp); 1501 error = dsl_deleg_access(zc->zc_name, 1502 zfs_prop_to_name(ZFS_PROP_SHAREISCSI), usercred); 1503 crfree(usercred); 1504 return (error); 1505 } 1506 1507 static int 1508 zfs_ioc_set_fsacl(zfs_cmd_t *zc) 1509 { 1510 int error; 1511 nvlist_t *fsaclnv = NULL; 1512 1513 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1514 &fsaclnv)) != 0) 1515 return (error); 1516 1517 /* 1518 * Verify nvlist is constructed correctly 1519 */ 1520 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 1521 nvlist_free(fsaclnv); 1522 return (EINVAL); 1523 } 1524 1525 /* 1526 * If we don't have PRIV_SYS_MOUNT, then validate 1527 * that user is allowed to hand out each permission in 1528 * the nvlist(s) 1529 */ 1530 1531 error = secpolicy_zfs(CRED()); 1532 if (error) { 1533 if (zc->zc_perm_action == B_FALSE) { 1534 error = dsl_deleg_can_allow(zc->zc_name, 1535 fsaclnv, CRED()); 1536 } else { 1537 error = dsl_deleg_can_unallow(zc->zc_name, 1538 fsaclnv, CRED()); 1539 } 1540 } 1541 1542 if (error == 0) 1543 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 1544 1545 nvlist_free(fsaclnv); 1546 return (error); 1547 } 1548 1549 static int 1550 zfs_ioc_get_fsacl(zfs_cmd_t *zc) 1551 { 1552 nvlist_t *nvp; 1553 int error; 1554 1555 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 1556 error = put_nvlist(zc, nvp); 1557 nvlist_free(nvp); 1558 } 1559 1560 return (error); 1561 } 1562 1563 static int 1564 zfs_ioc_create_minor(zfs_cmd_t *zc) 1565 { 1566 return (zvol_create_minor(zc->zc_name, ddi_driver_major(zfs_dip))); 1567 } 1568 1569 static int 1570 zfs_ioc_remove_minor(zfs_cmd_t *zc) 1571 { 1572 return (zvol_remove_minor(zc->zc_name)); 1573 } 1574 1575 /* 1576 * Search the vfs list for a specified resource. Returns a pointer to it 1577 * or NULL if no suitable entry is found. The caller of this routine 1578 * is responsible for releasing the returned vfs pointer. 1579 */ 1580 static vfs_t * 1581 zfs_get_vfs(const char *resource) 1582 { 1583 struct vfs *vfsp; 1584 struct vfs *vfs_found = NULL; 1585 1586 vfs_list_read_lock(); 1587 vfsp = rootvfs; 1588 do { 1589 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 1590 VFS_HOLD(vfsp); 1591 vfs_found = vfsp; 1592 break; 1593 } 1594 vfsp = vfsp->vfs_next; 1595 } while (vfsp != rootvfs); 1596 vfs_list_unlock(); 1597 return (vfs_found); 1598 } 1599 1600 /* ARGSUSED */ 1601 static void 1602 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 1603 { 1604 nvlist_t *nvprops = arg; 1605 uint64_t version = ZPL_VERSION; 1606 1607 (void) nvlist_lookup_uint64(nvprops, 1608 zfs_prop_to_name(ZFS_PROP_VERSION), &version); 1609 1610 zfs_create_fs(os, cr, version, tx); 1611 } 1612 1613 static int 1614 zfs_ioc_create(zfs_cmd_t *zc) 1615 { 1616 objset_t *clone; 1617 int error = 0; 1618 nvlist_t *nvprops = NULL; 1619 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 1620 dmu_objset_type_t type = zc->zc_objset_type; 1621 1622 switch (type) { 1623 1624 case DMU_OST_ZFS: 1625 cbfunc = zfs_create_cb; 1626 break; 1627 1628 case DMU_OST_ZVOL: 1629 cbfunc = zvol_create_cb; 1630 break; 1631 1632 default: 1633 cbfunc = NULL; 1634 } 1635 if (strchr(zc->zc_name, '@')) 1636 return (EINVAL); 1637 1638 if (zc->zc_nvlist_src != NULL && 1639 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1640 &nvprops)) != 0) 1641 return (error); 1642 1643 if (zc->zc_value[0] != '\0') { 1644 /* 1645 * We're creating a clone of an existing snapshot. 1646 */ 1647 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 1648 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) { 1649 nvlist_free(nvprops); 1650 return (EINVAL); 1651 } 1652 1653 error = dmu_objset_open(zc->zc_value, type, 1654 DS_MODE_STANDARD | DS_MODE_READONLY, &clone); 1655 if (error) { 1656 nvlist_free(nvprops); 1657 return (error); 1658 } 1659 error = dmu_objset_create(zc->zc_name, type, clone, NULL, NULL); 1660 dmu_objset_close(clone); 1661 } else { 1662 if (cbfunc == NULL) { 1663 nvlist_free(nvprops); 1664 return (EINVAL); 1665 } 1666 1667 if (type == DMU_OST_ZVOL) { 1668 uint64_t volsize, volblocksize; 1669 1670 if (nvprops == NULL || 1671 nvlist_lookup_uint64(nvprops, 1672 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1673 &volsize) != 0) { 1674 nvlist_free(nvprops); 1675 return (EINVAL); 1676 } 1677 1678 if ((error = nvlist_lookup_uint64(nvprops, 1679 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1680 &volblocksize)) != 0 && error != ENOENT) { 1681 nvlist_free(nvprops); 1682 return (EINVAL); 1683 } 1684 1685 if (error != 0) 1686 volblocksize = zfs_prop_default_numeric( 1687 ZFS_PROP_VOLBLOCKSIZE); 1688 1689 if ((error = zvol_check_volblocksize( 1690 volblocksize)) != 0 || 1691 (error = zvol_check_volsize(volsize, 1692 volblocksize)) != 0) { 1693 nvlist_free(nvprops); 1694 return (error); 1695 } 1696 } else if (type == DMU_OST_ZFS) { 1697 uint64_t version; 1698 1699 if (0 == nvlist_lookup_uint64(nvprops, 1700 zfs_prop_to_name(ZFS_PROP_VERSION), &version) && 1701 (version < ZPL_VERSION_INITIAL || 1702 version > ZPL_VERSION)) { 1703 nvlist_free(nvprops); 1704 return (EINVAL); 1705 } 1706 } 1707 1708 error = dmu_objset_create(zc->zc_name, type, NULL, cbfunc, 1709 nvprops); 1710 } 1711 1712 /* 1713 * It would be nice to do this atomically. 1714 */ 1715 if (error == 0) { 1716 if ((error = zfs_set_prop_nvlist(zc->zc_name, nvprops)) != 0) 1717 (void) dmu_objset_destroy(zc->zc_name); 1718 } 1719 1720 nvlist_free(nvprops); 1721 return (error); 1722 } 1723 1724 static int 1725 zfs_ioc_snapshot(zfs_cmd_t *zc) 1726 { 1727 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 1728 return (EINVAL); 1729 return (dmu_objset_snapshot(zc->zc_name, 1730 zc->zc_value, zc->zc_cookie)); 1731 } 1732 1733 int 1734 zfs_unmount_snap(char *name, void *arg) 1735 { 1736 char *snapname = arg; 1737 char *cp; 1738 vfs_t *vfsp = NULL; 1739 1740 /* 1741 * Snapshots (which are under .zfs control) must be unmounted 1742 * before they can be destroyed. 1743 */ 1744 1745 if (snapname) { 1746 (void) strcat(name, "@"); 1747 (void) strcat(name, snapname); 1748 vfsp = zfs_get_vfs(name); 1749 cp = strchr(name, '@'); 1750 *cp = '\0'; 1751 } else if (strchr(name, '@')) { 1752 vfsp = zfs_get_vfs(name); 1753 } 1754 1755 if (vfsp) { 1756 /* 1757 * Always force the unmount for snapshots. 1758 */ 1759 int flag = MS_FORCE; 1760 int err; 1761 1762 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) { 1763 VFS_RELE(vfsp); 1764 return (err); 1765 } 1766 VFS_RELE(vfsp); 1767 if ((err = dounmount(vfsp, flag, kcred)) != 0) 1768 return (err); 1769 } 1770 return (0); 1771 } 1772 1773 static int 1774 zfs_ioc_destroy_snaps(zfs_cmd_t *zc) 1775 { 1776 int err; 1777 1778 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0) 1779 return (EINVAL); 1780 err = dmu_objset_find(zc->zc_name, 1781 zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN); 1782 if (err) 1783 return (err); 1784 return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value)); 1785 } 1786 1787 static int 1788 zfs_ioc_destroy(zfs_cmd_t *zc) 1789 { 1790 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) { 1791 int err = zfs_unmount_snap(zc->zc_name, NULL); 1792 if (err) 1793 return (err); 1794 } 1795 1796 return (dmu_objset_destroy(zc->zc_name)); 1797 } 1798 1799 static int 1800 zfs_ioc_rollback(zfs_cmd_t *zc) 1801 { 1802 return (dmu_objset_rollback(zc->zc_name)); 1803 } 1804 1805 static int 1806 zfs_ioc_rename(zfs_cmd_t *zc) 1807 { 1808 boolean_t recursive = zc->zc_cookie & 1; 1809 1810 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 1811 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) 1812 return (EINVAL); 1813 1814 /* 1815 * Unmount snapshot unless we're doing a recursive rename, 1816 * in which case the dataset code figures out which snapshots 1817 * to unmount. 1818 */ 1819 if (!recursive && strchr(zc->zc_name, '@') != NULL && 1820 zc->zc_objset_type == DMU_OST_ZFS) { 1821 int err = zfs_unmount_snap(zc->zc_name, NULL); 1822 if (err) 1823 return (err); 1824 } 1825 1826 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive)); 1827 } 1828 1829 static int 1830 zfs_ioc_recvbackup(zfs_cmd_t *zc) 1831 { 1832 file_t *fp; 1833 int error, fd; 1834 offset_t new_off; 1835 1836 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 1837 strchr(zc->zc_value, '@') == NULL) 1838 return (EINVAL); 1839 1840 fd = zc->zc_cookie; 1841 fp = getf(fd); 1842 if (fp == NULL) 1843 return (EBADF); 1844 error = dmu_recvbackup(zc->zc_value, &zc->zc_begin_record, 1845 &zc->zc_cookie, (boolean_t)zc->zc_guid, fp->f_vnode, 1846 fp->f_offset); 1847 1848 new_off = fp->f_offset + zc->zc_cookie; 1849 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &new_off) == 0) 1850 fp->f_offset = new_off; 1851 1852 releasef(fd); 1853 return (error); 1854 } 1855 1856 static int 1857 zfs_ioc_sendbackup(zfs_cmd_t *zc) 1858 { 1859 objset_t *fromsnap = NULL; 1860 objset_t *tosnap; 1861 file_t *fp; 1862 int error; 1863 1864 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, 1865 DS_MODE_STANDARD | DS_MODE_READONLY, &tosnap); 1866 if (error) 1867 return (error); 1868 1869 if (zc->zc_value[0] != '\0') { 1870 char buf[MAXPATHLEN]; 1871 char *cp; 1872 1873 (void) strncpy(buf, zc->zc_name, sizeof (buf)); 1874 cp = strchr(buf, '@'); 1875 if (cp) 1876 *(cp+1) = 0; 1877 (void) strncat(buf, zc->zc_value, sizeof (buf)); 1878 error = dmu_objset_open(buf, DMU_OST_ANY, 1879 DS_MODE_STANDARD | DS_MODE_READONLY, &fromsnap); 1880 if (error) { 1881 dmu_objset_close(tosnap); 1882 return (error); 1883 } 1884 } 1885 1886 fp = getf(zc->zc_cookie); 1887 if (fp == NULL) { 1888 dmu_objset_close(tosnap); 1889 if (fromsnap) 1890 dmu_objset_close(fromsnap); 1891 return (EBADF); 1892 } 1893 1894 error = dmu_sendbackup(tosnap, fromsnap, fp->f_vnode); 1895 1896 releasef(zc->zc_cookie); 1897 if (fromsnap) 1898 dmu_objset_close(fromsnap); 1899 dmu_objset_close(tosnap); 1900 return (error); 1901 } 1902 1903 static int 1904 zfs_ioc_inject_fault(zfs_cmd_t *zc) 1905 { 1906 int id, error; 1907 1908 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 1909 &zc->zc_inject_record); 1910 1911 if (error == 0) 1912 zc->zc_guid = (uint64_t)id; 1913 1914 return (error); 1915 } 1916 1917 static int 1918 zfs_ioc_clear_fault(zfs_cmd_t *zc) 1919 { 1920 return (zio_clear_fault((int)zc->zc_guid)); 1921 } 1922 1923 static int 1924 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 1925 { 1926 int id = (int)zc->zc_guid; 1927 int error; 1928 1929 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 1930 &zc->zc_inject_record); 1931 1932 zc->zc_guid = id; 1933 1934 return (error); 1935 } 1936 1937 static int 1938 zfs_ioc_error_log(zfs_cmd_t *zc) 1939 { 1940 spa_t *spa; 1941 int error; 1942 size_t count = (size_t)zc->zc_nvlist_dst_size; 1943 1944 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1945 return (error); 1946 1947 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 1948 &count); 1949 if (error == 0) 1950 zc->zc_nvlist_dst_size = count; 1951 else 1952 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 1953 1954 spa_close(spa, FTAG); 1955 1956 return (error); 1957 } 1958 1959 static int 1960 zfs_ioc_clear(zfs_cmd_t *zc) 1961 { 1962 spa_t *spa; 1963 vdev_t *vd; 1964 uint64_t txg; 1965 int error; 1966 1967 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1968 return (error); 1969 1970 txg = spa_vdev_enter(spa); 1971 1972 if (zc->zc_guid == 0) { 1973 vd = NULL; 1974 } else if ((vd = spa_lookup_by_guid(spa, zc->zc_guid)) == NULL) { 1975 (void) spa_vdev_exit(spa, NULL, txg, ENODEV); 1976 spa_close(spa, FTAG); 1977 return (ENODEV); 1978 } 1979 1980 vdev_clear(spa, vd); 1981 1982 (void) spa_vdev_exit(spa, NULL, txg, 0); 1983 1984 spa_close(spa, FTAG); 1985 1986 return (0); 1987 } 1988 1989 static int 1990 zfs_ioc_promote(zfs_cmd_t *zc) 1991 { 1992 char *cp; 1993 1994 /* 1995 * We don't need to unmount *all* the origin fs's snapshots, but 1996 * it's easier. 1997 */ 1998 cp = strchr(zc->zc_value, '@'); 1999 if (cp) 2000 *cp = '\0'; 2001 (void) dmu_objset_find(zc->zc_value, 2002 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS); 2003 return (dsl_dataset_promote(zc->zc_name)); 2004 } 2005 2006 /* 2007 * We don't want to have a hard dependency 2008 * against some special symbols in sharefs 2009 * and nfs. Determine them if needed when 2010 * the first file system is shared. 2011 * Neither sharefs or nfs are unloadable modules. 2012 */ 2013 int (*zexport_fs)(void *arg); 2014 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 2015 2016 int zfs_share_inited; 2017 ddi_modhandle_t nfs_mod; 2018 ddi_modhandle_t sharefs_mod; 2019 kmutex_t zfs_share_lock; 2020 2021 static int 2022 zfs_ioc_share(zfs_cmd_t *zc) 2023 { 2024 int error; 2025 int opcode; 2026 2027 if (zfs_share_inited == 0) { 2028 mutex_enter(&zfs_share_lock); 2029 nfs_mod = ddi_modopen("fs/nfs", KRTLD_MODE_FIRST, &error); 2030 sharefs_mod = ddi_modopen("fs/sharefs", 2031 KRTLD_MODE_FIRST, &error); 2032 if (nfs_mod == NULL || sharefs_mod == NULL) { 2033 mutex_exit(&zfs_share_lock); 2034 return (ENOSYS); 2035 } 2036 if (zexport_fs == NULL && ((zexport_fs = (int (*)(void *)) 2037 ddi_modsym(nfs_mod, "nfs_export", &error)) == NULL)) { 2038 mutex_exit(&zfs_share_lock); 2039 return (ENOSYS); 2040 } 2041 2042 if (zshare_fs == NULL && ((zshare_fs = 2043 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 2044 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 2045 mutex_exit(&zfs_share_lock); 2046 return (ENOSYS); 2047 } 2048 zfs_share_inited = 1; 2049 mutex_exit(&zfs_share_lock); 2050 } 2051 2052 if (error = zexport_fs((void *)(uintptr_t)zc->zc_share.z_exportdata)) 2053 return (error); 2054 2055 opcode = (zc->zc_share.z_sharetype == B_TRUE) ? 2056 SHAREFS_ADD : SHAREFS_REMOVE; 2057 2058 error = zshare_fs(opcode, 2059 (void *)(uintptr_t)zc->zc_share.z_sharedata, 2060 zc->zc_share.z_sharemax); 2061 2062 return (error); 2063 2064 } 2065 2066 /* 2067 * pool create, destroy, and export don't log the history as part of 2068 * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export 2069 * do the logging of those commands. 2070 */ 2071 static zfs_ioc_vec_t zfs_ioc_vec[] = { 2072 { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE }, 2073 { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE }, 2074 { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2075 { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE }, 2076 { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE }, 2077 { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE }, 2078 { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE }, 2079 { zfs_ioc_pool_scrub, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2080 { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE }, 2081 { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2082 { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE }, 2083 { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2084 { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2085 { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2086 { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2087 { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2088 { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE }, 2089 { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE }, 2090 { zfs_ioc_dataset_list_next, zfs_secpolicy_read, 2091 DATASET_NAME, B_FALSE }, 2092 { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, 2093 DATASET_NAME, B_FALSE }, 2094 { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE }, 2095 { zfs_ioc_create_minor, zfs_secpolicy_minor, DATASET_NAME, B_FALSE }, 2096 { zfs_ioc_remove_minor, zfs_secpolicy_minor, DATASET_NAME, B_FALSE }, 2097 { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE }, 2098 { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE }, 2099 { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE }, 2100 { zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE }, 2101 { zfs_ioc_recvbackup, zfs_secpolicy_receive, DATASET_NAME, B_TRUE }, 2102 { zfs_ioc_sendbackup, zfs_secpolicy_send, DATASET_NAME, B_TRUE }, 2103 { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE }, 2104 { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE }, 2105 { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE }, 2106 { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE }, 2107 { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2108 { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE }, 2109 { zfs_ioc_destroy_snaps, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE }, 2110 { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE }, 2111 { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_config, POOL_NAME, B_FALSE }, 2112 { zfs_ioc_obj_to_path, zfs_secpolicy_config, NO_NAME, B_FALSE }, 2113 { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE }, 2114 { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE }, 2115 { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE }, 2116 { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE }, 2117 { zfs_ioc_iscsi_perm_check, zfs_secpolicy_iscsi, 2118 DATASET_NAME, B_FALSE }, 2119 { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE }, 2120 { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE }, 2121 }; 2122 2123 static int 2124 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 2125 { 2126 zfs_cmd_t *zc; 2127 uint_t vec; 2128 int error, rc; 2129 2130 if (getminor(dev) != 0) 2131 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 2132 2133 vec = cmd - ZFS_IOC; 2134 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 2135 2136 if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 2137 return (EINVAL); 2138 2139 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 2140 2141 error = xcopyin((void *)arg, zc, sizeof (zfs_cmd_t)); 2142 2143 if (error == 0) 2144 error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr); 2145 2146 /* 2147 * Ensure that all pool/dataset names are valid before we pass down to 2148 * the lower layers. 2149 */ 2150 if (error == 0) { 2151 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 2152 switch (zfs_ioc_vec[vec].zvec_namecheck) { 2153 case POOL_NAME: 2154 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 2155 error = EINVAL; 2156 break; 2157 2158 case DATASET_NAME: 2159 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 2160 error = EINVAL; 2161 break; 2162 2163 case NO_NAME: 2164 break; 2165 } 2166 } 2167 2168 if (error == 0) 2169 error = zfs_ioc_vec[vec].zvec_func(zc); 2170 2171 rc = xcopyout(zc, (void *)arg, sizeof (zfs_cmd_t)); 2172 if (error == 0) { 2173 error = rc; 2174 if (zfs_ioc_vec[vec].zvec_his_log == B_TRUE) 2175 zfs_log_history(zc); 2176 } 2177 2178 kmem_free(zc, sizeof (zfs_cmd_t)); 2179 return (error); 2180 } 2181 2182 static int 2183 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 2184 { 2185 if (cmd != DDI_ATTACH) 2186 return (DDI_FAILURE); 2187 2188 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 2189 DDI_PSEUDO, 0) == DDI_FAILURE) 2190 return (DDI_FAILURE); 2191 2192 zfs_dip = dip; 2193 2194 ddi_report_dev(dip); 2195 2196 return (DDI_SUCCESS); 2197 } 2198 2199 static int 2200 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 2201 { 2202 if (spa_busy() || zfs_busy() || zvol_busy()) 2203 return (DDI_FAILURE); 2204 2205 if (cmd != DDI_DETACH) 2206 return (DDI_FAILURE); 2207 2208 zfs_dip = NULL; 2209 2210 ddi_prop_remove_all(dip); 2211 ddi_remove_minor_node(dip, NULL); 2212 2213 return (DDI_SUCCESS); 2214 } 2215 2216 /*ARGSUSED*/ 2217 static int 2218 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 2219 { 2220 switch (infocmd) { 2221 case DDI_INFO_DEVT2DEVINFO: 2222 *result = zfs_dip; 2223 return (DDI_SUCCESS); 2224 2225 case DDI_INFO_DEVT2INSTANCE: 2226 *result = (void *)0; 2227 return (DDI_SUCCESS); 2228 } 2229 2230 return (DDI_FAILURE); 2231 } 2232 2233 /* 2234 * OK, so this is a little weird. 2235 * 2236 * /dev/zfs is the control node, i.e. minor 0. 2237 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 2238 * 2239 * /dev/zfs has basically nothing to do except serve up ioctls, 2240 * so most of the standard driver entry points are in zvol.c. 2241 */ 2242 static struct cb_ops zfs_cb_ops = { 2243 zvol_open, /* open */ 2244 zvol_close, /* close */ 2245 zvol_strategy, /* strategy */ 2246 nodev, /* print */ 2247 nodev, /* dump */ 2248 zvol_read, /* read */ 2249 zvol_write, /* write */ 2250 zfsdev_ioctl, /* ioctl */ 2251 nodev, /* devmap */ 2252 nodev, /* mmap */ 2253 nodev, /* segmap */ 2254 nochpoll, /* poll */ 2255 ddi_prop_op, /* prop_op */ 2256 NULL, /* streamtab */ 2257 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 2258 CB_REV, /* version */ 2259 nodev, /* async read */ 2260 nodev, /* async write */ 2261 }; 2262 2263 static struct dev_ops zfs_dev_ops = { 2264 DEVO_REV, /* version */ 2265 0, /* refcnt */ 2266 zfs_info, /* info */ 2267 nulldev, /* identify */ 2268 nulldev, /* probe */ 2269 zfs_attach, /* attach */ 2270 zfs_detach, /* detach */ 2271 nodev, /* reset */ 2272 &zfs_cb_ops, /* driver operations */ 2273 NULL /* no bus operations */ 2274 }; 2275 2276 static struct modldrv zfs_modldrv = { 2277 &mod_driverops, "ZFS storage pool version " SPA_VERSION_STRING, 2278 &zfs_dev_ops 2279 }; 2280 2281 static struct modlinkage modlinkage = { 2282 MODREV_1, 2283 (void *)&zfs_modlfs, 2284 (void *)&zfs_modldrv, 2285 NULL 2286 }; 2287 2288 2289 uint_t zfs_fsyncer_key; 2290 2291 int 2292 _init(void) 2293 { 2294 int error; 2295 2296 spa_init(FREAD | FWRITE); 2297 zfs_init(); 2298 zvol_init(); 2299 2300 if ((error = mod_install(&modlinkage)) != 0) { 2301 zvol_fini(); 2302 zfs_fini(); 2303 spa_fini(); 2304 return (error); 2305 } 2306 2307 tsd_create(&zfs_fsyncer_key, NULL); 2308 2309 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 2310 ASSERT(error == 0); 2311 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 2312 2313 return (0); 2314 } 2315 2316 int 2317 _fini(void) 2318 { 2319 int error; 2320 2321 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 2322 return (EBUSY); 2323 2324 if ((error = mod_remove(&modlinkage)) != 0) 2325 return (error); 2326 2327 zvol_fini(); 2328 zfs_fini(); 2329 spa_fini(); 2330 if (zfs_share_inited) { 2331 (void) ddi_modclose(nfs_mod); 2332 (void) ddi_modclose(sharefs_mod); 2333 } 2334 2335 tsd_destroy(&zfs_fsyncer_key); 2336 ldi_ident_release(zfs_li); 2337 zfs_li = NULL; 2338 mutex_destroy(&zfs_share_lock); 2339 2340 return (error); 2341 } 2342 2343 int 2344 _info(struct modinfo *modinfop) 2345 { 2346 return (mod_info(&modlinkage, modinfop)); 2347 } 2348