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 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Portions Copyright 2011 Martin Matuska 25 * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved. 26 * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 27 * Copyright (c) 2014, Joyent, Inc. All rights reserved. 28 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 29 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 30 * Copyright (c) 2013 Steven Hartland. All rights reserved. 31 * Copyright (c) 2014 Integros [integros.com] 32 */ 33 34 /* 35 * ZFS ioctls. 36 * 37 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage 38 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool. 39 * 40 * There are two ways that we handle ioctls: the legacy way where almost 41 * all of the logic is in the ioctl callback, and the new way where most 42 * of the marshalling is handled in the common entry point, zfsdev_ioctl(). 43 * 44 * Non-legacy ioctls should be registered by calling 45 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked 46 * from userland by lzc_ioctl(). 47 * 48 * The registration arguments are as follows: 49 * 50 * const char *name 51 * The name of the ioctl. This is used for history logging. If the 52 * ioctl returns successfully (the callback returns 0), and allow_log 53 * is true, then a history log entry will be recorded with the input & 54 * output nvlists. The log entry can be printed with "zpool history -i". 55 * 56 * zfs_ioc_t ioc 57 * The ioctl request number, which userland will pass to ioctl(2). 58 * The ioctl numbers can change from release to release, because 59 * the caller (libzfs) must be matched to the kernel. 60 * 61 * zfs_secpolicy_func_t *secpolicy 62 * This function will be called before the zfs_ioc_func_t, to 63 * determine if this operation is permitted. It should return EPERM 64 * on failure, and 0 on success. Checks include determining if the 65 * dataset is visible in this zone, and if the user has either all 66 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission 67 * to do this operation on this dataset with "zfs allow". 68 * 69 * zfs_ioc_namecheck_t namecheck 70 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool 71 * name, a dataset name, or nothing. If the name is not well-formed, 72 * the ioctl will fail and the callback will not be called. 73 * Therefore, the callback can assume that the name is well-formed 74 * (e.g. is null-terminated, doesn't have more than one '@' character, 75 * doesn't have invalid characters). 76 * 77 * zfs_ioc_poolcheck_t pool_check 78 * This specifies requirements on the pool state. If the pool does 79 * not meet them (is suspended or is readonly), the ioctl will fail 80 * and the callback will not be called. If any checks are specified 81 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME. 82 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED | 83 * POOL_CHECK_READONLY). 84 * 85 * boolean_t smush_outnvlist 86 * If smush_outnvlist is true, then the output is presumed to be a 87 * list of errors, and it will be "smushed" down to fit into the 88 * caller's buffer, by removing some entries and replacing them with a 89 * single "N_MORE_ERRORS" entry indicating how many were removed. See 90 * nvlist_smush() for details. If smush_outnvlist is false, and the 91 * outnvlist does not fit into the userland-provided buffer, then the 92 * ioctl will fail with ENOMEM. 93 * 94 * zfs_ioc_func_t *func 95 * The callback function that will perform the operation. 96 * 97 * The callback should return 0 on success, or an error number on 98 * failure. If the function fails, the userland ioctl will return -1, 99 * and errno will be set to the callback's return value. The callback 100 * will be called with the following arguments: 101 * 102 * const char *name 103 * The name of the pool or dataset to operate on, from 104 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the 105 * expected type (pool, dataset, or none). 106 * 107 * nvlist_t *innvl 108 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or 109 * NULL if no input nvlist was provided. Changes to this nvlist are 110 * ignored. If the input nvlist could not be deserialized, the 111 * ioctl will fail and the callback will not be called. 112 * 113 * nvlist_t *outnvl 114 * The output nvlist, initially empty. The callback can fill it in, 115 * and it will be returned to userland by serializing it into 116 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization 117 * fails (e.g. because the caller didn't supply a large enough 118 * buffer), then the overall ioctl will fail. See the 119 * 'smush_nvlist' argument above for additional behaviors. 120 * 121 * There are two typical uses of the output nvlist: 122 * - To return state, e.g. property values. In this case, 123 * smush_outnvlist should be false. If the buffer was not large 124 * enough, the caller will reallocate a larger buffer and try 125 * the ioctl again. 126 * 127 * - To return multiple errors from an ioctl which makes on-disk 128 * changes. In this case, smush_outnvlist should be true. 129 * Ioctls which make on-disk modifications should generally not 130 * use the outnvl if they succeed, because the caller can not 131 * distinguish between the operation failing, and 132 * deserialization failing. 133 */ 134 135 #include <sys/types.h> 136 #include <sys/param.h> 137 #include <sys/errno.h> 138 #include <sys/uio.h> 139 #include <sys/buf.h> 140 #include <sys/modctl.h> 141 #include <sys/open.h> 142 #include <sys/file.h> 143 #include <sys/kmem.h> 144 #include <sys/conf.h> 145 #include <sys/cmn_err.h> 146 #include <sys/stat.h> 147 #include <sys/zfs_ioctl.h> 148 #include <sys/zfs_vfsops.h> 149 #include <sys/zfs_znode.h> 150 #include <sys/zap.h> 151 #include <sys/spa.h> 152 #include <sys/spa_impl.h> 153 #include <sys/vdev.h> 154 #include <sys/priv_impl.h> 155 #include <sys/dmu.h> 156 #include <sys/dsl_dir.h> 157 #include <sys/dsl_dataset.h> 158 #include <sys/dsl_prop.h> 159 #include <sys/dsl_deleg.h> 160 #include <sys/dmu_objset.h> 161 #include <sys/dmu_impl.h> 162 #include <sys/dmu_tx.h> 163 #include <sys/ddi.h> 164 #include <sys/sunddi.h> 165 #include <sys/sunldi.h> 166 #include <sys/policy.h> 167 #include <sys/zone.h> 168 #include <sys/nvpair.h> 169 #include <sys/pathname.h> 170 #include <sys/mount.h> 171 #include <sys/sdt.h> 172 #include <sys/fs/zfs.h> 173 #include <sys/zfs_ctldir.h> 174 #include <sys/zfs_dir.h> 175 #include <sys/zfs_onexit.h> 176 #include <sys/zvol.h> 177 #include <sys/dsl_scan.h> 178 #include <sharefs/share.h> 179 #include <sys/dmu_objset.h> 180 #include <sys/dmu_send.h> 181 #include <sys/dsl_destroy.h> 182 #include <sys/dsl_bookmark.h> 183 #include <sys/dsl_userhold.h> 184 #include <sys/zfeature.h> 185 #include <sys/zio_checksum.h> 186 #include <sys/zfs_events.h> 187 188 #include "zfs_namecheck.h" 189 #include "zfs_prop.h" 190 #include "zfs_deleg.h" 191 #include "zfs_comutil.h" 192 193 extern struct modlfs zfs_modlfs; 194 195 extern void zfs_init(void); 196 extern void zfs_fini(void); 197 198 ldi_ident_t zfs_li = NULL; 199 dev_info_t *zfs_dip; 200 201 uint_t zfs_fsyncer_key; 202 extern uint_t rrw_tsd_key; 203 static uint_t zfs_allow_log_key; 204 205 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *); 206 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *); 207 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *); 208 209 typedef enum { 210 NO_NAME, 211 POOL_NAME, 212 DATASET_NAME 213 } zfs_ioc_namecheck_t; 214 215 typedef enum { 216 POOL_CHECK_NONE = 1 << 0, 217 POOL_CHECK_SUSPENDED = 1 << 1, 218 POOL_CHECK_READONLY = 1 << 2, 219 } zfs_ioc_poolcheck_t; 220 221 typedef struct zfs_ioc_vec { 222 zfs_ioc_legacy_func_t *zvec_legacy_func; 223 zfs_ioc_func_t *zvec_func; 224 zfs_secpolicy_func_t *zvec_secpolicy; 225 zfs_ioc_namecheck_t zvec_namecheck; 226 boolean_t zvec_allow_log; 227 zfs_ioc_poolcheck_t zvec_pool_check; 228 boolean_t zvec_smush_outnvlist; 229 const char *zvec_name; 230 } zfs_ioc_vec_t; 231 232 /* This array is indexed by zfs_userquota_prop_t */ 233 static const char *userquota_perms[] = { 234 ZFS_DELEG_PERM_USERUSED, 235 ZFS_DELEG_PERM_USERQUOTA, 236 ZFS_DELEG_PERM_GROUPUSED, 237 ZFS_DELEG_PERM_GROUPQUOTA, 238 }; 239 240 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc); 241 static int zfs_check_settable(const char *name, nvpair_t *property, 242 cred_t *cr); 243 static int zfs_check_clearable(char *dataset, nvlist_t *props, 244 nvlist_t **errors); 245 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *, 246 boolean_t *); 247 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *); 248 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp); 249 250 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature); 251 252 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ 253 void 254 __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 255 { 256 const char *newfile; 257 char buf[512]; 258 va_list adx; 259 260 /* 261 * Get rid of annoying "../common/" prefix to filename. 262 */ 263 newfile = strrchr(file, '/'); 264 if (newfile != NULL) { 265 newfile = newfile + 1; /* Get rid of leading / */ 266 } else { 267 newfile = file; 268 } 269 270 va_start(adx, fmt); 271 (void) vsnprintf(buf, sizeof (buf), fmt, adx); 272 va_end(adx); 273 274 /* 275 * To get this data, use the zfs-dprintf probe as so: 276 * dtrace -q -n 'zfs-dprintf \ 277 * /stringof(arg0) == "dbuf.c"/ \ 278 * {printf("%s: %s", stringof(arg1), stringof(arg3))}' 279 * arg0 = file name 280 * arg1 = function name 281 * arg2 = line number 282 * arg3 = message 283 */ 284 DTRACE_PROBE4(zfs__dprintf, 285 char *, newfile, char *, func, int, line, char *, buf); 286 } 287 288 static void 289 history_str_free(char *buf) 290 { 291 kmem_free(buf, HIS_MAX_RECORD_LEN); 292 } 293 294 static char * 295 history_str_get(zfs_cmd_t *zc) 296 { 297 char *buf; 298 299 if (zc->zc_history == NULL) 300 return (NULL); 301 302 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); 303 if (copyinstr((void *)(uintptr_t)zc->zc_history, 304 buf, HIS_MAX_RECORD_LEN, NULL) != 0) { 305 history_str_free(buf); 306 return (NULL); 307 } 308 309 buf[HIS_MAX_RECORD_LEN -1] = '\0'; 310 311 return (buf); 312 } 313 314 /* 315 * Check to see if the named dataset is currently defined as bootable 316 */ 317 static boolean_t 318 zfs_is_bootfs(const char *name) 319 { 320 objset_t *os; 321 322 if (dmu_objset_hold(name, FTAG, &os) == 0) { 323 boolean_t ret; 324 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os))); 325 dmu_objset_rele(os, FTAG); 326 return (ret); 327 } 328 return (B_FALSE); 329 } 330 331 /* 332 * Return non-zero if the spa version is less than requested version. 333 */ 334 static int 335 zfs_earlier_version(const char *name, int version) 336 { 337 spa_t *spa; 338 339 if (spa_open(name, &spa, FTAG) == 0) { 340 if (spa_version(spa) < version) { 341 spa_close(spa, FTAG); 342 return (1); 343 } 344 spa_close(spa, FTAG); 345 } 346 return (0); 347 } 348 349 /* 350 * Return TRUE if the ZPL version is less than requested version. 351 */ 352 static boolean_t 353 zpl_earlier_version(const char *name, int version) 354 { 355 objset_t *os; 356 boolean_t rc = B_TRUE; 357 358 if (dmu_objset_hold(name, FTAG, &os) == 0) { 359 uint64_t zplversion; 360 361 if (dmu_objset_type(os) != DMU_OST_ZFS) { 362 dmu_objset_rele(os, FTAG); 363 return (B_TRUE); 364 } 365 /* XXX reading from non-owned objset */ 366 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0) 367 rc = zplversion < version; 368 dmu_objset_rele(os, FTAG); 369 } 370 return (rc); 371 } 372 373 static void 374 zfs_log_history(zfs_cmd_t *zc) 375 { 376 spa_t *spa; 377 char *buf; 378 379 if ((buf = history_str_get(zc)) == NULL) 380 return; 381 382 if (spa_open(zc->zc_name, &spa, FTAG) == 0) { 383 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) 384 (void) spa_history_log(spa, buf); 385 spa_close(spa, FTAG); 386 } 387 history_str_free(buf); 388 } 389 390 /* 391 * Policy for top-level read operations (list pools). Requires no privileges, 392 * and can be used in the local zone, as there is no associated dataset. 393 */ 394 /* ARGSUSED */ 395 static int 396 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 397 { 398 return (0); 399 } 400 401 /* 402 * Policy for dataset read operations (list children, get statistics). Requires 403 * no privileges, but must be visible in the local zone. 404 */ 405 /* ARGSUSED */ 406 static int 407 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 408 { 409 if (INGLOBALZONE(curproc) || 410 zone_dataset_visible(zc->zc_name, NULL)) 411 return (0); 412 413 return (SET_ERROR(ENOENT)); 414 } 415 416 static int 417 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr) 418 { 419 int writable = 1; 420 421 /* 422 * The dataset must be visible by this zone -- check this first 423 * so they don't see EPERM on something they shouldn't know about. 424 */ 425 if (!INGLOBALZONE(curproc) && 426 !zone_dataset_visible(dataset, &writable)) 427 return (SET_ERROR(ENOENT)); 428 429 if (INGLOBALZONE(curproc)) { 430 /* 431 * If the fs is zoned, only root can access it from the 432 * global zone. 433 */ 434 if (secpolicy_zfs(cr) && zoned) 435 return (SET_ERROR(EPERM)); 436 } else { 437 /* 438 * If we are in a local zone, the 'zoned' property must be set. 439 */ 440 if (!zoned) 441 return (SET_ERROR(EPERM)); 442 443 /* must be writable by this zone */ 444 if (!writable) 445 return (SET_ERROR(EPERM)); 446 } 447 return (0); 448 } 449 450 static int 451 zfs_dozonecheck(const char *dataset, cred_t *cr) 452 { 453 uint64_t zoned; 454 455 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL)) 456 return (SET_ERROR(ENOENT)); 457 458 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 459 } 460 461 static int 462 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr) 463 { 464 uint64_t zoned; 465 466 if (dsl_prop_get_int_ds(ds, "zoned", &zoned)) 467 return (SET_ERROR(ENOENT)); 468 469 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 470 } 471 472 static int 473 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds, 474 const char *perm, cred_t *cr) 475 { 476 int error; 477 478 error = zfs_dozonecheck_ds(name, ds, cr); 479 if (error == 0) { 480 error = secpolicy_zfs(cr); 481 if (error != 0) 482 error = dsl_deleg_access_impl(ds, perm, cr); 483 } 484 return (error); 485 } 486 487 static int 488 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) 489 { 490 int error; 491 dsl_dataset_t *ds; 492 dsl_pool_t *dp; 493 494 error = dsl_pool_hold(name, FTAG, &dp); 495 if (error != 0) 496 return (error); 497 498 error = dsl_dataset_hold(dp, name, FTAG, &ds); 499 if (error != 0) { 500 dsl_pool_rele(dp, FTAG); 501 return (error); 502 } 503 504 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr); 505 506 dsl_dataset_rele(ds, FTAG); 507 dsl_pool_rele(dp, FTAG); 508 return (error); 509 } 510 511 /* 512 * Policy for setting the security label property. 513 * 514 * Returns 0 for success, non-zero for access and other errors. 515 */ 516 static int 517 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr) 518 { 519 char ds_hexsl[MAXNAMELEN]; 520 bslabel_t ds_sl, new_sl; 521 boolean_t new_default = FALSE; 522 uint64_t zoned; 523 int needed_priv = -1; 524 int error; 525 526 /* First get the existing dataset label. */ 527 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 528 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 529 if (error != 0) 530 return (SET_ERROR(EPERM)); 531 532 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 533 new_default = TRUE; 534 535 /* The label must be translatable */ 536 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0)) 537 return (SET_ERROR(EINVAL)); 538 539 /* 540 * In a non-global zone, disallow attempts to set a label that 541 * doesn't match that of the zone; otherwise no other checks 542 * are needed. 543 */ 544 if (!INGLOBALZONE(curproc)) { 545 if (new_default || !blequal(&new_sl, CR_SL(CRED()))) 546 return (SET_ERROR(EPERM)); 547 return (0); 548 } 549 550 /* 551 * For global-zone datasets (i.e., those whose zoned property is 552 * "off", verify that the specified new label is valid for the 553 * global zone. 554 */ 555 if (dsl_prop_get_integer(name, 556 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 557 return (SET_ERROR(EPERM)); 558 if (!zoned) { 559 if (zfs_check_global_label(name, strval) != 0) 560 return (SET_ERROR(EPERM)); 561 } 562 563 /* 564 * If the existing dataset label is nondefault, check if the 565 * dataset is mounted (label cannot be changed while mounted). 566 * Get the zfsvfs; if there isn't one, then the dataset isn't 567 * mounted (or isn't a dataset, doesn't exist, ...). 568 */ 569 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) { 570 objset_t *os; 571 static char *setsl_tag = "setsl_tag"; 572 573 /* 574 * Try to own the dataset; abort if there is any error, 575 * (e.g., already mounted, in use, or other error). 576 */ 577 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE, 578 setsl_tag, &os); 579 if (error != 0) 580 return (SET_ERROR(EPERM)); 581 582 dmu_objset_disown(os, setsl_tag); 583 584 if (new_default) { 585 needed_priv = PRIV_FILE_DOWNGRADE_SL; 586 goto out_check; 587 } 588 589 if (hexstr_to_label(strval, &new_sl) != 0) 590 return (SET_ERROR(EPERM)); 591 592 if (blstrictdom(&ds_sl, &new_sl)) 593 needed_priv = PRIV_FILE_DOWNGRADE_SL; 594 else if (blstrictdom(&new_sl, &ds_sl)) 595 needed_priv = PRIV_FILE_UPGRADE_SL; 596 } else { 597 /* dataset currently has a default label */ 598 if (!new_default) 599 needed_priv = PRIV_FILE_UPGRADE_SL; 600 } 601 602 out_check: 603 if (needed_priv != -1) 604 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL)); 605 return (0); 606 } 607 608 static int 609 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval, 610 cred_t *cr) 611 { 612 char *strval; 613 614 /* 615 * Check permissions for special properties. 616 */ 617 switch (prop) { 618 case ZFS_PROP_ZONED: 619 /* 620 * Disallow setting of 'zoned' from within a local zone. 621 */ 622 if (!INGLOBALZONE(curproc)) 623 return (SET_ERROR(EPERM)); 624 break; 625 626 case ZFS_PROP_QUOTA: 627 case ZFS_PROP_FILESYSTEM_LIMIT: 628 case ZFS_PROP_SNAPSHOT_LIMIT: 629 if (!INGLOBALZONE(curproc)) { 630 uint64_t zoned; 631 char setpoint[MAXNAMELEN]; 632 /* 633 * Unprivileged users are allowed to modify the 634 * limit on things *under* (ie. contained by) 635 * the thing they own. 636 */ 637 if (dsl_prop_get_integer(dsname, "zoned", &zoned, 638 setpoint)) 639 return (SET_ERROR(EPERM)); 640 if (!zoned || strlen(dsname) <= strlen(setpoint)) 641 return (SET_ERROR(EPERM)); 642 } 643 break; 644 645 case ZFS_PROP_MLSLABEL: 646 if (!is_system_labeled()) 647 return (SET_ERROR(EPERM)); 648 649 if (nvpair_value_string(propval, &strval) == 0) { 650 int err; 651 652 err = zfs_set_slabel_policy(dsname, strval, CRED()); 653 if (err != 0) 654 return (err); 655 } 656 break; 657 } 658 659 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr)); 660 } 661 662 /* ARGSUSED */ 663 static int 664 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 665 { 666 int error; 667 668 error = zfs_dozonecheck(zc->zc_name, cr); 669 if (error != 0) 670 return (error); 671 672 /* 673 * permission to set permissions will be evaluated later in 674 * dsl_deleg_can_allow() 675 */ 676 return (0); 677 } 678 679 /* ARGSUSED */ 680 static int 681 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 682 { 683 return (zfs_secpolicy_write_perms(zc->zc_name, 684 ZFS_DELEG_PERM_ROLLBACK, cr)); 685 } 686 687 /* ARGSUSED */ 688 static int 689 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 690 { 691 dsl_pool_t *dp; 692 dsl_dataset_t *ds; 693 char *cp; 694 int error; 695 696 /* 697 * Generate the current snapshot name from the given objsetid, then 698 * use that name for the secpolicy/zone checks. 699 */ 700 cp = strchr(zc->zc_name, '@'); 701 if (cp == NULL) 702 return (SET_ERROR(EINVAL)); 703 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 704 if (error != 0) 705 return (error); 706 707 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 708 if (error != 0) { 709 dsl_pool_rele(dp, FTAG); 710 return (error); 711 } 712 713 dsl_dataset_name(ds, zc->zc_name); 714 715 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds, 716 ZFS_DELEG_PERM_SEND, cr); 717 dsl_dataset_rele(ds, FTAG); 718 dsl_pool_rele(dp, FTAG); 719 720 return (error); 721 } 722 723 /* ARGSUSED */ 724 static int 725 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 726 { 727 return (zfs_secpolicy_write_perms(zc->zc_name, 728 ZFS_DELEG_PERM_SEND, cr)); 729 } 730 731 /* ARGSUSED */ 732 static int 733 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 734 { 735 vnode_t *vp; 736 int error; 737 738 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 739 NO_FOLLOW, NULL, &vp)) != 0) 740 return (error); 741 742 /* Now make sure mntpnt and dataset are ZFS */ 743 744 if (vp->v_vfsp->vfs_fstype != zfsfstype || 745 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 746 zc->zc_name) != 0)) { 747 VN_RELE(vp); 748 return (SET_ERROR(EPERM)); 749 } 750 751 VN_RELE(vp); 752 return (dsl_deleg_access(zc->zc_name, 753 ZFS_DELEG_PERM_SHARE, cr)); 754 } 755 756 int 757 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 758 { 759 if (!INGLOBALZONE(curproc)) 760 return (SET_ERROR(EPERM)); 761 762 if (secpolicy_nfs(cr) == 0) { 763 return (0); 764 } else { 765 return (zfs_secpolicy_deleg_share(zc, innvl, cr)); 766 } 767 } 768 769 int 770 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 771 { 772 if (!INGLOBALZONE(curproc)) 773 return (SET_ERROR(EPERM)); 774 775 if (secpolicy_smb(cr) == 0) { 776 return (0); 777 } else { 778 return (zfs_secpolicy_deleg_share(zc, innvl, cr)); 779 } 780 } 781 782 static int 783 zfs_get_parent(const char *datasetname, char *parent, int parentsize) 784 { 785 char *cp; 786 787 /* 788 * Remove the @bla or /bla from the end of the name to get the parent. 789 */ 790 (void) strncpy(parent, datasetname, parentsize); 791 cp = strrchr(parent, '@'); 792 if (cp != NULL) { 793 cp[0] = '\0'; 794 } else { 795 cp = strrchr(parent, '/'); 796 if (cp == NULL) 797 return (SET_ERROR(ENOENT)); 798 cp[0] = '\0'; 799 } 800 801 return (0); 802 } 803 804 int 805 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 806 { 807 int error; 808 809 if ((error = zfs_secpolicy_write_perms(name, 810 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 811 return (error); 812 813 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); 814 } 815 816 /* ARGSUSED */ 817 static int 818 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 819 { 820 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); 821 } 822 823 /* 824 * Destroying snapshots with delegated permissions requires 825 * descendant mount and destroy permissions. 826 */ 827 /* ARGSUSED */ 828 static int 829 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 830 { 831 nvlist_t *snaps; 832 nvpair_t *pair, *nextpair; 833 int error = 0; 834 835 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 836 return (SET_ERROR(EINVAL)); 837 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 838 pair = nextpair) { 839 nextpair = nvlist_next_nvpair(snaps, pair); 840 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr); 841 if (error == ENOENT) { 842 /* 843 * Ignore any snapshots that don't exist (we consider 844 * them "already destroyed"). Remove the name from the 845 * nvl here in case the snapshot is created between 846 * now and when we try to destroy it (in which case 847 * we don't want to destroy it since we haven't 848 * checked for permission). 849 */ 850 fnvlist_remove_nvpair(snaps, pair); 851 error = 0; 852 } 853 if (error != 0) 854 break; 855 } 856 857 return (error); 858 } 859 860 int 861 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 862 { 863 char parentname[MAXNAMELEN]; 864 int error; 865 866 if ((error = zfs_secpolicy_write_perms(from, 867 ZFS_DELEG_PERM_RENAME, cr)) != 0) 868 return (error); 869 870 if ((error = zfs_secpolicy_write_perms(from, 871 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 872 return (error); 873 874 if ((error = zfs_get_parent(to, parentname, 875 sizeof (parentname))) != 0) 876 return (error); 877 878 if ((error = zfs_secpolicy_write_perms(parentname, 879 ZFS_DELEG_PERM_CREATE, cr)) != 0) 880 return (error); 881 882 if ((error = zfs_secpolicy_write_perms(parentname, 883 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 884 return (error); 885 886 return (error); 887 } 888 889 /* ARGSUSED */ 890 static int 891 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 892 { 893 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); 894 } 895 896 /* ARGSUSED */ 897 static int 898 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 899 { 900 dsl_pool_t *dp; 901 dsl_dataset_t *clone; 902 int error; 903 904 error = zfs_secpolicy_write_perms(zc->zc_name, 905 ZFS_DELEG_PERM_PROMOTE, cr); 906 if (error != 0) 907 return (error); 908 909 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 910 if (error != 0) 911 return (error); 912 913 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone); 914 915 if (error == 0) { 916 char parentname[MAXNAMELEN]; 917 dsl_dataset_t *origin = NULL; 918 dsl_dir_t *dd; 919 dd = clone->ds_dir; 920 921 error = dsl_dataset_hold_obj(dd->dd_pool, 922 dsl_dir_phys(dd)->dd_origin_obj, FTAG, &origin); 923 if (error != 0) { 924 dsl_dataset_rele(clone, FTAG); 925 dsl_pool_rele(dp, FTAG); 926 return (error); 927 } 928 929 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone, 930 ZFS_DELEG_PERM_MOUNT, cr); 931 932 dsl_dataset_name(origin, parentname); 933 if (error == 0) { 934 error = zfs_secpolicy_write_perms_ds(parentname, origin, 935 ZFS_DELEG_PERM_PROMOTE, cr); 936 } 937 dsl_dataset_rele(clone, FTAG); 938 dsl_dataset_rele(origin, FTAG); 939 } 940 dsl_pool_rele(dp, FTAG); 941 return (error); 942 } 943 944 /* ARGSUSED */ 945 static int 946 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 947 { 948 int error; 949 950 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 951 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 952 return (error); 953 954 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 955 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 956 return (error); 957 958 return (zfs_secpolicy_write_perms(zc->zc_name, 959 ZFS_DELEG_PERM_CREATE, cr)); 960 } 961 962 int 963 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 964 { 965 return (zfs_secpolicy_write_perms(name, 966 ZFS_DELEG_PERM_SNAPSHOT, cr)); 967 } 968 969 /* 970 * Check for permission to create each snapshot in the nvlist. 971 */ 972 /* ARGSUSED */ 973 static int 974 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 975 { 976 nvlist_t *snaps; 977 int error = 0; 978 nvpair_t *pair; 979 980 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 981 return (SET_ERROR(EINVAL)); 982 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 983 pair = nvlist_next_nvpair(snaps, pair)) { 984 char *name = nvpair_name(pair); 985 char *atp = strchr(name, '@'); 986 987 if (atp == NULL) { 988 error = SET_ERROR(EINVAL); 989 break; 990 } 991 *atp = '\0'; 992 error = zfs_secpolicy_snapshot_perms(name, cr); 993 *atp = '@'; 994 if (error != 0) 995 break; 996 } 997 return (error); 998 } 999 1000 /* 1001 * Check for permission to create each snapshot in the nvlist. 1002 */ 1003 /* ARGSUSED */ 1004 static int 1005 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1006 { 1007 int error = 0; 1008 1009 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 1010 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 1011 char *name = nvpair_name(pair); 1012 char *hashp = strchr(name, '#'); 1013 1014 if (hashp == NULL) { 1015 error = SET_ERROR(EINVAL); 1016 break; 1017 } 1018 *hashp = '\0'; 1019 error = zfs_secpolicy_write_perms(name, 1020 ZFS_DELEG_PERM_BOOKMARK, cr); 1021 *hashp = '#'; 1022 if (error != 0) 1023 break; 1024 } 1025 return (error); 1026 } 1027 1028 /* ARGSUSED */ 1029 static int 1030 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1031 { 1032 nvpair_t *pair, *nextpair; 1033 int error = 0; 1034 1035 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; 1036 pair = nextpair) { 1037 char *name = nvpair_name(pair); 1038 char *hashp = strchr(name, '#'); 1039 nextpair = nvlist_next_nvpair(innvl, pair); 1040 1041 if (hashp == NULL) { 1042 error = SET_ERROR(EINVAL); 1043 break; 1044 } 1045 1046 *hashp = '\0'; 1047 error = zfs_secpolicy_write_perms(name, 1048 ZFS_DELEG_PERM_DESTROY, cr); 1049 *hashp = '#'; 1050 if (error == ENOENT) { 1051 /* 1052 * Ignore any filesystems that don't exist (we consider 1053 * their bookmarks "already destroyed"). Remove 1054 * the name from the nvl here in case the filesystem 1055 * is created between now and when we try to destroy 1056 * the bookmark (in which case we don't want to 1057 * destroy it since we haven't checked for permission). 1058 */ 1059 fnvlist_remove_nvpair(innvl, pair); 1060 error = 0; 1061 } 1062 if (error != 0) 1063 break; 1064 } 1065 1066 return (error); 1067 } 1068 1069 /* ARGSUSED */ 1070 static int 1071 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1072 { 1073 /* 1074 * Even root must have a proper TSD so that we know what pool 1075 * to log to. 1076 */ 1077 if (tsd_get(zfs_allow_log_key) == NULL) 1078 return (SET_ERROR(EPERM)); 1079 return (0); 1080 } 1081 1082 static int 1083 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1084 { 1085 char parentname[MAXNAMELEN]; 1086 int error; 1087 char *origin; 1088 1089 if ((error = zfs_get_parent(zc->zc_name, parentname, 1090 sizeof (parentname))) != 0) 1091 return (error); 1092 1093 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 && 1094 (error = zfs_secpolicy_write_perms(origin, 1095 ZFS_DELEG_PERM_CLONE, cr)) != 0) 1096 return (error); 1097 1098 if ((error = zfs_secpolicy_write_perms(parentname, 1099 ZFS_DELEG_PERM_CREATE, cr)) != 0) 1100 return (error); 1101 1102 return (zfs_secpolicy_write_perms(parentname, 1103 ZFS_DELEG_PERM_MOUNT, cr)); 1104 } 1105 1106 /* 1107 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 1108 * SYS_CONFIG privilege, which is not available in a local zone. 1109 */ 1110 /* ARGSUSED */ 1111 static int 1112 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1113 { 1114 if (secpolicy_sys_config(cr, B_FALSE) != 0) 1115 return (SET_ERROR(EPERM)); 1116 1117 return (0); 1118 } 1119 1120 /* 1121 * Policy for object to name lookups. 1122 */ 1123 /* ARGSUSED */ 1124 static int 1125 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1126 { 1127 int error; 1128 1129 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0) 1130 return (0); 1131 1132 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr); 1133 return (error); 1134 } 1135 1136 /* 1137 * Policy for fault injection. Requires all privileges. 1138 */ 1139 /* ARGSUSED */ 1140 static int 1141 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1142 { 1143 return (secpolicy_zinject(cr)); 1144 } 1145 1146 /* ARGSUSED */ 1147 static int 1148 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1149 { 1150 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 1151 1152 if (prop == ZPROP_INVAL) { 1153 if (!zfs_prop_user(zc->zc_value)) 1154 return (SET_ERROR(EINVAL)); 1155 return (zfs_secpolicy_write_perms(zc->zc_name, 1156 ZFS_DELEG_PERM_USERPROP, cr)); 1157 } else { 1158 return (zfs_secpolicy_setprop(zc->zc_name, prop, 1159 NULL, cr)); 1160 } 1161 } 1162 1163 static int 1164 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1165 { 1166 int err = zfs_secpolicy_read(zc, innvl, cr); 1167 if (err) 1168 return (err); 1169 1170 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 1171 return (SET_ERROR(EINVAL)); 1172 1173 if (zc->zc_value[0] == 0) { 1174 /* 1175 * They are asking about a posix uid/gid. If it's 1176 * themself, allow it. 1177 */ 1178 if (zc->zc_objset_type == ZFS_PROP_USERUSED || 1179 zc->zc_objset_type == ZFS_PROP_USERQUOTA) { 1180 if (zc->zc_guid == crgetuid(cr)) 1181 return (0); 1182 } else { 1183 if (groupmember(zc->zc_guid, cr)) 1184 return (0); 1185 } 1186 } 1187 1188 return (zfs_secpolicy_write_perms(zc->zc_name, 1189 userquota_perms[zc->zc_objset_type], cr)); 1190 } 1191 1192 static int 1193 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1194 { 1195 int err = zfs_secpolicy_read(zc, innvl, cr); 1196 if (err) 1197 return (err); 1198 1199 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 1200 return (SET_ERROR(EINVAL)); 1201 1202 return (zfs_secpolicy_write_perms(zc->zc_name, 1203 userquota_perms[zc->zc_objset_type], cr)); 1204 } 1205 1206 /* ARGSUSED */ 1207 static int 1208 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1209 { 1210 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, 1211 NULL, cr)); 1212 } 1213 1214 /* ARGSUSED */ 1215 static int 1216 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1217 { 1218 nvpair_t *pair; 1219 nvlist_t *holds; 1220 int error; 1221 1222 error = nvlist_lookup_nvlist(innvl, "holds", &holds); 1223 if (error != 0) 1224 return (SET_ERROR(EINVAL)); 1225 1226 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; 1227 pair = nvlist_next_nvpair(holds, pair)) { 1228 char fsname[MAXNAMELEN]; 1229 error = dmu_fsname(nvpair_name(pair), fsname); 1230 if (error != 0) 1231 return (error); 1232 error = zfs_secpolicy_write_perms(fsname, 1233 ZFS_DELEG_PERM_HOLD, cr); 1234 if (error != 0) 1235 return (error); 1236 } 1237 return (0); 1238 } 1239 1240 /* ARGSUSED */ 1241 static int 1242 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1243 { 1244 nvpair_t *pair; 1245 int error; 1246 1247 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; 1248 pair = nvlist_next_nvpair(innvl, pair)) { 1249 char fsname[MAXNAMELEN]; 1250 error = dmu_fsname(nvpair_name(pair), fsname); 1251 if (error != 0) 1252 return (error); 1253 error = zfs_secpolicy_write_perms(fsname, 1254 ZFS_DELEG_PERM_RELEASE, cr); 1255 if (error != 0) 1256 return (error); 1257 } 1258 return (0); 1259 } 1260 1261 /* 1262 * Policy for allowing temporary snapshots to be taken or released 1263 */ 1264 static int 1265 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1266 { 1267 /* 1268 * A temporary snapshot is the same as a snapshot, 1269 * hold, destroy and release all rolled into one. 1270 * Delegated diff alone is sufficient that we allow this. 1271 */ 1272 int error; 1273 1274 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 1275 ZFS_DELEG_PERM_DIFF, cr)) == 0) 1276 return (0); 1277 1278 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr); 1279 if (error == 0) 1280 error = zfs_secpolicy_hold(zc, innvl, cr); 1281 if (error == 0) 1282 error = zfs_secpolicy_release(zc, innvl, cr); 1283 if (error == 0) 1284 error = zfs_secpolicy_destroy(zc, innvl, cr); 1285 return (error); 1286 } 1287 1288 /* 1289 * Policy for allowing setting the zev callback list. 1290 */ 1291 static int 1292 zfs_secpolicy_set_zev_callbacks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1293 { 1294 /* must be called from kernel context */ 1295 if (!(zc->zc_iflags & FKIOCTL)) 1296 return (SET_ERROR(EPERM)); 1297 /* callback pointer must be unset (set to default value) */ 1298 rw_enter(&rz_zev_rwlock, RW_READER); 1299 if (rz_zev_callbacks != rz_zev_default_callbacks) { 1300 rw_exit(&rz_zev_rwlock); 1301 return (SET_ERROR(EBUSY)); 1302 } 1303 rw_exit(&rz_zev_rwlock); 1304 return (0); 1305 } 1306 1307 /* 1308 * Policy for allowing unsetting/resetting the zev callback list. 1309 */ 1310 static int 1311 zfs_secpolicy_unset_zev_callbacks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1312 { 1313 /* must be called from kernel context */ 1314 if (!(zc->zc_iflags & FKIOCTL)) 1315 return (SET_ERROR(EPERM)); 1316 return (0); 1317 } 1318 1319 /* 1320 * Returns the nvlist as specified by the user in the zfs_cmd_t. 1321 */ 1322 static int 1323 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) 1324 { 1325 char *packed; 1326 int error; 1327 nvlist_t *list = NULL; 1328 1329 /* 1330 * Read in and unpack the user-supplied nvlist. 1331 */ 1332 if (size == 0) 1333 return (SET_ERROR(EINVAL)); 1334 1335 packed = kmem_alloc(size, KM_SLEEP); 1336 1337 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, 1338 iflag)) != 0) { 1339 kmem_free(packed, size); 1340 return (SET_ERROR(EFAULT)); 1341 } 1342 1343 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 1344 kmem_free(packed, size); 1345 return (error); 1346 } 1347 1348 kmem_free(packed, size); 1349 1350 *nvp = list; 1351 return (0); 1352 } 1353 1354 /* 1355 * Reduce the size of this nvlist until it can be serialized in 'max' bytes. 1356 * Entries will be removed from the end of the nvlist, and one int32 entry 1357 * named "N_MORE_ERRORS" will be added indicating how many entries were 1358 * removed. 1359 */ 1360 static int 1361 nvlist_smush(nvlist_t *errors, size_t max) 1362 { 1363 size_t size; 1364 1365 size = fnvlist_size(errors); 1366 1367 if (size > max) { 1368 nvpair_t *more_errors; 1369 int n = 0; 1370 1371 if (max < 1024) 1372 return (SET_ERROR(ENOMEM)); 1373 1374 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0); 1375 more_errors = nvlist_prev_nvpair(errors, NULL); 1376 1377 do { 1378 nvpair_t *pair = nvlist_prev_nvpair(errors, 1379 more_errors); 1380 fnvlist_remove_nvpair(errors, pair); 1381 n++; 1382 size = fnvlist_size(errors); 1383 } while (size > max); 1384 1385 fnvlist_remove_nvpair(errors, more_errors); 1386 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n); 1387 ASSERT3U(fnvlist_size(errors), <=, max); 1388 } 1389 1390 return (0); 1391 } 1392 1393 static int 1394 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 1395 { 1396 char *packed = NULL; 1397 int error = 0; 1398 size_t size; 1399 1400 size = fnvlist_size(nvl); 1401 1402 if (size > zc->zc_nvlist_dst_size) { 1403 error = SET_ERROR(ENOMEM); 1404 } else { 1405 packed = fnvlist_pack(nvl, &size); 1406 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 1407 size, zc->zc_iflags) != 0) 1408 error = SET_ERROR(EFAULT); 1409 fnvlist_pack_free(packed, size); 1410 } 1411 1412 zc->zc_nvlist_dst_size = size; 1413 zc->zc_nvlist_dst_filled = B_TRUE; 1414 return (error); 1415 } 1416 1417 static int 1418 getzfsvfs(const char *dsname, zfsvfs_t **zfvp) 1419 { 1420 objset_t *os; 1421 int error; 1422 1423 error = dmu_objset_hold(dsname, FTAG, &os); 1424 if (error != 0) 1425 return (error); 1426 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1427 dmu_objset_rele(os, FTAG); 1428 return (SET_ERROR(EINVAL)); 1429 } 1430 1431 mutex_enter(&os->os_user_ptr_lock); 1432 *zfvp = dmu_objset_get_user(os); 1433 if (*zfvp) { 1434 VFS_HOLD((*zfvp)->z_vfs); 1435 } else { 1436 error = SET_ERROR(ESRCH); 1437 } 1438 mutex_exit(&os->os_user_ptr_lock); 1439 dmu_objset_rele(os, FTAG); 1440 return (error); 1441 } 1442 1443 /* 1444 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which 1445 * case its z_vfs will be NULL, and it will be opened as the owner. 1446 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER, 1447 * which prevents all vnode ops from running. 1448 */ 1449 static int 1450 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer) 1451 { 1452 int error = 0; 1453 1454 if (getzfsvfs(name, zfvp) != 0) 1455 error = zfsvfs_create(name, zfvp); 1456 if (error == 0) { 1457 rrm_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER : 1458 RW_READER, tag); 1459 if ((*zfvp)->z_unmounted) { 1460 /* 1461 * XXX we could probably try again, since the unmounting 1462 * thread should be just about to disassociate the 1463 * objset from the zfsvfs. 1464 */ 1465 rrm_exit(&(*zfvp)->z_teardown_lock, tag); 1466 return (SET_ERROR(EBUSY)); 1467 } 1468 } 1469 return (error); 1470 } 1471 1472 static void 1473 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) 1474 { 1475 rrm_exit(&zfsvfs->z_teardown_lock, tag); 1476 1477 if (zfsvfs->z_vfs) { 1478 VFS_RELE(zfsvfs->z_vfs); 1479 } else { 1480 dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1481 zfsvfs_free(zfsvfs); 1482 } 1483 } 1484 1485 static int 1486 zfs_ioc_pool_create(zfs_cmd_t *zc) 1487 { 1488 int error; 1489 nvlist_t *config, *props = NULL; 1490 nvlist_t *rootprops = NULL; 1491 nvlist_t *zplprops = NULL; 1492 1493 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1494 zc->zc_iflags, &config)) 1495 return (error); 1496 1497 if (zc->zc_nvlist_src_size != 0 && (error = 1498 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1499 zc->zc_iflags, &props))) { 1500 nvlist_free(config); 1501 return (error); 1502 } 1503 1504 if (props) { 1505 nvlist_t *nvl = NULL; 1506 uint64_t version = SPA_VERSION; 1507 1508 (void) nvlist_lookup_uint64(props, 1509 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); 1510 if (!SPA_VERSION_IS_SUPPORTED(version)) { 1511 error = SET_ERROR(EINVAL); 1512 goto pool_props_bad; 1513 } 1514 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); 1515 if (nvl) { 1516 error = nvlist_dup(nvl, &rootprops, KM_SLEEP); 1517 if (error != 0) { 1518 nvlist_free(config); 1519 nvlist_free(props); 1520 return (error); 1521 } 1522 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); 1523 } 1524 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1525 error = zfs_fill_zplprops_root(version, rootprops, 1526 zplprops, NULL); 1527 if (error != 0) 1528 goto pool_props_bad; 1529 } 1530 1531 error = spa_create(zc->zc_name, config, props, zplprops); 1532 1533 /* 1534 * Set the remaining root properties 1535 */ 1536 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, 1537 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) 1538 (void) spa_destroy(zc->zc_name); 1539 1540 pool_props_bad: 1541 nvlist_free(rootprops); 1542 nvlist_free(zplprops); 1543 nvlist_free(config); 1544 nvlist_free(props); 1545 1546 return (error); 1547 } 1548 1549 static int 1550 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 1551 { 1552 int error; 1553 zfs_log_history(zc); 1554 error = spa_destroy(zc->zc_name); 1555 if (error == 0) 1556 zvol_remove_minors(zc->zc_name); 1557 return (error); 1558 } 1559 1560 static int 1561 zfs_ioc_pool_import(zfs_cmd_t *zc) 1562 { 1563 nvlist_t *config, *props = NULL; 1564 uint64_t guid; 1565 int error; 1566 1567 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1568 zc->zc_iflags, &config)) != 0) 1569 return (error); 1570 1571 if (zc->zc_nvlist_src_size != 0 && (error = 1572 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1573 zc->zc_iflags, &props))) { 1574 nvlist_free(config); 1575 return (error); 1576 } 1577 1578 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1579 guid != zc->zc_guid) 1580 error = SET_ERROR(EINVAL); 1581 else 1582 error = spa_import(zc->zc_name, config, props, zc->zc_cookie); 1583 1584 if (zc->zc_nvlist_dst != 0) { 1585 int err; 1586 1587 if ((err = put_nvlist(zc, config)) != 0) 1588 error = err; 1589 } 1590 1591 nvlist_free(config); 1592 1593 nvlist_free(props); 1594 1595 return (error); 1596 } 1597 1598 static int 1599 zfs_ioc_pool_export(zfs_cmd_t *zc) 1600 { 1601 int error; 1602 boolean_t force = (boolean_t)zc->zc_cookie; 1603 boolean_t hardforce = (boolean_t)zc->zc_guid; 1604 1605 zfs_log_history(zc); 1606 error = spa_export(zc->zc_name, NULL, force, hardforce); 1607 if (error == 0) 1608 zvol_remove_minors(zc->zc_name); 1609 return (error); 1610 } 1611 1612 static int 1613 zfs_ioc_pool_configs(zfs_cmd_t *zc) 1614 { 1615 nvlist_t *configs; 1616 int error; 1617 1618 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 1619 return (SET_ERROR(EEXIST)); 1620 1621 error = put_nvlist(zc, configs); 1622 1623 nvlist_free(configs); 1624 1625 return (error); 1626 } 1627 1628 /* 1629 * inputs: 1630 * zc_name name of the pool 1631 * 1632 * outputs: 1633 * zc_cookie real errno 1634 * zc_nvlist_dst config nvlist 1635 * zc_nvlist_dst_size size of config nvlist 1636 */ 1637 static int 1638 zfs_ioc_pool_stats(zfs_cmd_t *zc) 1639 { 1640 nvlist_t *config; 1641 int error; 1642 int ret = 0; 1643 1644 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 1645 sizeof (zc->zc_value)); 1646 1647 if (config != NULL) { 1648 ret = put_nvlist(zc, config); 1649 nvlist_free(config); 1650 1651 /* 1652 * The config may be present even if 'error' is non-zero. 1653 * In this case we return success, and preserve the real errno 1654 * in 'zc_cookie'. 1655 */ 1656 zc->zc_cookie = error; 1657 } else { 1658 ret = error; 1659 } 1660 1661 return (ret); 1662 } 1663 1664 /* 1665 * Try to import the given pool, returning pool stats as appropriate so that 1666 * user land knows which devices are available and overall pool health. 1667 */ 1668 static int 1669 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 1670 { 1671 nvlist_t *tryconfig, *config; 1672 int error; 1673 1674 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1675 zc->zc_iflags, &tryconfig)) != 0) 1676 return (error); 1677 1678 config = spa_tryimport(tryconfig); 1679 1680 nvlist_free(tryconfig); 1681 1682 if (config == NULL) 1683 return (SET_ERROR(EINVAL)); 1684 1685 error = put_nvlist(zc, config); 1686 nvlist_free(config); 1687 1688 return (error); 1689 } 1690 1691 /* 1692 * inputs: 1693 * zc_name name of the pool 1694 * zc_cookie scan func (pool_scan_func_t) 1695 */ 1696 static int 1697 zfs_ioc_pool_scan(zfs_cmd_t *zc) 1698 { 1699 spa_t *spa; 1700 int error; 1701 1702 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1703 return (error); 1704 1705 if (zc->zc_cookie == POOL_SCAN_NONE) 1706 error = spa_scan_stop(spa); 1707 else 1708 error = spa_scan(spa, zc->zc_cookie); 1709 1710 spa_close(spa, FTAG); 1711 1712 return (error); 1713 } 1714 1715 static int 1716 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 1717 { 1718 spa_t *spa; 1719 int error; 1720 1721 error = spa_open(zc->zc_name, &spa, FTAG); 1722 if (error == 0) { 1723 spa_freeze(spa); 1724 spa_close(spa, FTAG); 1725 } 1726 return (error); 1727 } 1728 1729 static int 1730 zfs_ioc_arc_info(zfs_cmd_t *zc) 1731 { 1732 int ret; 1733 void *buf; 1734 size_t sz = zc->zc_nvlist_dst_size; 1735 size_t returned_bytes; 1736 1737 if (zc->zc_nvlist_dst == 0) 1738 return (SET_ERROR(EINVAL)); 1739 1740 buf = kmem_alloc(sz, KM_NOSLEEP); 1741 if (buf == NULL) 1742 return (SET_ERROR(ENOMEM)); 1743 1744 ret = arc_dump(zc->zc_obj, buf, sz, &returned_bytes); 1745 if (ret != 0) { 1746 kmem_free(buf, sz); 1747 return (SET_ERROR(ret)); 1748 } 1749 1750 zc->zc_nvlist_dst_filled = 1; 1751 ret = ddi_copyout(buf, (void *)(uintptr_t)zc->zc_nvlist_dst, 1752 returned_bytes, zc->zc_iflags); 1753 kmem_free(buf, sz); 1754 if (ret != 0) 1755 ret = SET_ERROR(EFAULT); 1756 1757 return (ret); 1758 } 1759 1760 static int 1761 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 1762 { 1763 spa_t *spa; 1764 int error; 1765 1766 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1767 return (error); 1768 1769 if (zc->zc_cookie < spa_version(spa) || 1770 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) { 1771 spa_close(spa, FTAG); 1772 return (SET_ERROR(EINVAL)); 1773 } 1774 1775 spa_upgrade(spa, zc->zc_cookie); 1776 spa_close(spa, FTAG); 1777 1778 return (error); 1779 } 1780 1781 static int 1782 zfs_ioc_pool_get_history(zfs_cmd_t *zc) 1783 { 1784 spa_t *spa; 1785 char *hist_buf; 1786 uint64_t size; 1787 int error; 1788 1789 if ((size = zc->zc_history_len) == 0) 1790 return (SET_ERROR(EINVAL)); 1791 1792 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1793 return (error); 1794 1795 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 1796 spa_close(spa, FTAG); 1797 return (SET_ERROR(ENOTSUP)); 1798 } 1799 1800 hist_buf = kmem_alloc(size, KM_SLEEP); 1801 if ((error = spa_history_get(spa, &zc->zc_history_offset, 1802 &zc->zc_history_len, hist_buf)) == 0) { 1803 error = ddi_copyout(hist_buf, 1804 (void *)(uintptr_t)zc->zc_history, 1805 zc->zc_history_len, zc->zc_iflags); 1806 } 1807 1808 spa_close(spa, FTAG); 1809 kmem_free(hist_buf, size); 1810 return (error); 1811 } 1812 1813 static int 1814 zfs_ioc_pool_reguid(zfs_cmd_t *zc) 1815 { 1816 spa_t *spa; 1817 int error; 1818 1819 error = spa_open(zc->zc_name, &spa, FTAG); 1820 if (error == 0) { 1821 error = spa_change_guid(spa); 1822 spa_close(spa, FTAG); 1823 } 1824 return (error); 1825 } 1826 1827 static int 1828 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 1829 { 1830 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)); 1831 } 1832 1833 /* 1834 * inputs: 1835 * zc_name name of filesystem 1836 * zc_obj object to find 1837 * 1838 * outputs: 1839 * zc_value name of object 1840 */ 1841 static int 1842 zfs_ioc_obj_to_path(zfs_cmd_t *zc) 1843 { 1844 objset_t *os; 1845 int error; 1846 1847 /* XXX reading from objset not owned */ 1848 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1849 return (error); 1850 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1851 dmu_objset_rele(os, FTAG); 1852 return (SET_ERROR(EINVAL)); 1853 } 1854 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, 1855 sizeof (zc->zc_value)); 1856 dmu_objset_rele(os, FTAG); 1857 1858 return (error); 1859 } 1860 1861 /* 1862 * inputs: 1863 * zc_name name of filesystem 1864 * zc_obj object to find 1865 * 1866 * outputs: 1867 * zc_stat stats on object 1868 * zc_value path to object 1869 */ 1870 static int 1871 zfs_ioc_obj_to_stats(zfs_cmd_t *zc) 1872 { 1873 objset_t *os; 1874 int error; 1875 1876 /* XXX reading from objset not owned */ 1877 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1878 return (error); 1879 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1880 dmu_objset_rele(os, FTAG); 1881 return (SET_ERROR(EINVAL)); 1882 } 1883 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value, 1884 sizeof (zc->zc_value)); 1885 dmu_objset_rele(os, FTAG); 1886 1887 return (error); 1888 } 1889 1890 static int 1891 zfs_ioc_vdev_add(zfs_cmd_t *zc) 1892 { 1893 spa_t *spa; 1894 int error; 1895 nvlist_t *config, **l2cache, **spares; 1896 uint_t nl2cache = 0, nspares = 0; 1897 1898 error = spa_open(zc->zc_name, &spa, FTAG); 1899 if (error != 0) 1900 return (error); 1901 1902 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1903 zc->zc_iflags, &config); 1904 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, 1905 &l2cache, &nl2cache); 1906 1907 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, 1908 &spares, &nspares); 1909 1910 /* 1911 * A root pool with concatenated devices is not supported. 1912 * Thus, can not add a device to a root pool. 1913 * 1914 * Intent log device can not be added to a rootpool because 1915 * during mountroot, zil is replayed, a seperated log device 1916 * can not be accessed during the mountroot time. 1917 * 1918 * l2cache and spare devices are ok to be added to a rootpool. 1919 */ 1920 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { 1921 nvlist_free(config); 1922 spa_close(spa, FTAG); 1923 return (SET_ERROR(EDOM)); 1924 } 1925 1926 if (error == 0) { 1927 error = spa_vdev_add(spa, config); 1928 nvlist_free(config); 1929 } 1930 spa_close(spa, FTAG); 1931 return (error); 1932 } 1933 1934 /* 1935 * inputs: 1936 * zc_name name of the pool 1937 * zc_nvlist_conf nvlist of devices to remove 1938 * zc_cookie to stop the remove? 1939 */ 1940 static int 1941 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 1942 { 1943 spa_t *spa; 1944 int error; 1945 1946 error = spa_open(zc->zc_name, &spa, FTAG); 1947 if (error != 0) 1948 return (error); 1949 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 1950 spa_close(spa, FTAG); 1951 return (error); 1952 } 1953 1954 static int 1955 zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 1956 { 1957 spa_t *spa; 1958 int error; 1959 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 1960 1961 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1962 return (error); 1963 switch (zc->zc_cookie) { 1964 case VDEV_STATE_ONLINE: 1965 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 1966 break; 1967 1968 case VDEV_STATE_OFFLINE: 1969 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 1970 break; 1971 1972 case VDEV_STATE_FAULTED: 1973 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1974 zc->zc_obj != VDEV_AUX_EXTERNAL) 1975 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1976 1977 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); 1978 break; 1979 1980 case VDEV_STATE_DEGRADED: 1981 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1982 zc->zc_obj != VDEV_AUX_EXTERNAL) 1983 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1984 1985 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj); 1986 break; 1987 1988 default: 1989 error = SET_ERROR(EINVAL); 1990 } 1991 zc->zc_cookie = newstate; 1992 spa_close(spa, FTAG); 1993 return (error); 1994 } 1995 1996 static int 1997 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1998 { 1999 spa_t *spa; 2000 int replacing = zc->zc_cookie; 2001 nvlist_t *config; 2002 int error; 2003 2004 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 2005 return (error); 2006 2007 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 2008 zc->zc_iflags, &config)) == 0) { 2009 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 2010 nvlist_free(config); 2011 } 2012 2013 spa_close(spa, FTAG); 2014 return (error); 2015 } 2016 2017 static int 2018 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 2019 { 2020 spa_t *spa; 2021 int error; 2022 2023 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 2024 return (error); 2025 2026 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); 2027 2028 spa_close(spa, FTAG); 2029 return (error); 2030 } 2031 2032 static int 2033 zfs_ioc_vdev_split(zfs_cmd_t *zc) 2034 { 2035 spa_t *spa; 2036 nvlist_t *config, *props = NULL; 2037 int error; 2038 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT); 2039 2040 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 2041 return (error); 2042 2043 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 2044 zc->zc_iflags, &config)) { 2045 spa_close(spa, FTAG); 2046 return (error); 2047 } 2048 2049 if (zc->zc_nvlist_src_size != 0 && (error = 2050 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2051 zc->zc_iflags, &props))) { 2052 spa_close(spa, FTAG); 2053 nvlist_free(config); 2054 return (error); 2055 } 2056 2057 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp); 2058 2059 spa_close(spa, FTAG); 2060 2061 nvlist_free(config); 2062 nvlist_free(props); 2063 2064 return (error); 2065 } 2066 2067 static int 2068 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 2069 { 2070 spa_t *spa; 2071 char *path = zc->zc_value; 2072 uint64_t guid = zc->zc_guid; 2073 int error; 2074 2075 error = spa_open(zc->zc_name, &spa, FTAG); 2076 if (error != 0) 2077 return (error); 2078 2079 error = spa_vdev_setpath(spa, guid, path); 2080 spa_close(spa, FTAG); 2081 return (error); 2082 } 2083 2084 static int 2085 zfs_ioc_vdev_setfru(zfs_cmd_t *zc) 2086 { 2087 spa_t *spa; 2088 char *fru = zc->zc_value; 2089 uint64_t guid = zc->zc_guid; 2090 int error; 2091 2092 error = spa_open(zc->zc_name, &spa, FTAG); 2093 if (error != 0) 2094 return (error); 2095 2096 error = spa_vdev_setfru(spa, guid, fru); 2097 spa_close(spa, FTAG); 2098 return (error); 2099 } 2100 2101 static int 2102 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os) 2103 { 2104 int error = 0; 2105 nvlist_t *nv; 2106 2107 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 2108 2109 if (zc->zc_nvlist_dst != 0 && 2110 (error = dsl_prop_get_all(os, &nv)) == 0) { 2111 dmu_objset_stats(os, nv); 2112 /* 2113 * NB: zvol_get_stats() will read the objset contents, 2114 * which we aren't supposed to do with a 2115 * DS_MODE_USER hold, because it could be 2116 * inconsistent. So this is a bit of a workaround... 2117 * XXX reading with out owning 2118 */ 2119 if (!zc->zc_objset_stats.dds_inconsistent && 2120 dmu_objset_type(os) == DMU_OST_ZVOL) { 2121 error = zvol_get_stats(os, nv); 2122 if (error == EIO) 2123 return (error); 2124 VERIFY0(error); 2125 } 2126 error = put_nvlist(zc, nv); 2127 nvlist_free(nv); 2128 } 2129 2130 return (error); 2131 } 2132 2133 /* 2134 * inputs: 2135 * zc_name name of filesystem 2136 * zc_nvlist_dst_size size of buffer for property nvlist 2137 * 2138 * outputs: 2139 * zc_objset_stats stats 2140 * zc_nvlist_dst property nvlist 2141 * zc_nvlist_dst_size size of property nvlist 2142 */ 2143 static int 2144 zfs_ioc_objset_stats(zfs_cmd_t *zc) 2145 { 2146 objset_t *os; 2147 int error; 2148 2149 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2150 if (error == 0) { 2151 error = zfs_ioc_objset_stats_impl(zc, os); 2152 dmu_objset_rele(os, FTAG); 2153 } 2154 2155 return (error); 2156 } 2157 2158 /* 2159 * inputs: 2160 * zc_name name of filesystem 2161 * zc_nvlist_dst_size size of buffer for property nvlist 2162 * 2163 * outputs: 2164 * zc_nvlist_dst received property nvlist 2165 * zc_nvlist_dst_size size of received property nvlist 2166 * 2167 * Gets received properties (distinct from local properties on or after 2168 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from 2169 * local property values. 2170 */ 2171 static int 2172 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) 2173 { 2174 int error = 0; 2175 nvlist_t *nv; 2176 2177 /* 2178 * Without this check, we would return local property values if the 2179 * caller has not already received properties on or after 2180 * SPA_VERSION_RECVD_PROPS. 2181 */ 2182 if (!dsl_prop_get_hasrecvd(zc->zc_name)) 2183 return (SET_ERROR(ENOTSUP)); 2184 2185 if (zc->zc_nvlist_dst != 0 && 2186 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) { 2187 error = put_nvlist(zc, nv); 2188 nvlist_free(nv); 2189 } 2190 2191 return (error); 2192 } 2193 2194 static int 2195 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) 2196 { 2197 uint64_t value; 2198 int error; 2199 2200 /* 2201 * zfs_get_zplprop() will either find a value or give us 2202 * the default value (if there is one). 2203 */ 2204 if ((error = zfs_get_zplprop(os, prop, &value)) != 0) 2205 return (error); 2206 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); 2207 return (0); 2208 } 2209 2210 /* 2211 * inputs: 2212 * zc_name name of filesystem 2213 * zc_nvlist_dst_size size of buffer for zpl property nvlist 2214 * 2215 * outputs: 2216 * zc_nvlist_dst zpl property nvlist 2217 * zc_nvlist_dst_size size of zpl property nvlist 2218 */ 2219 static int 2220 zfs_ioc_objset_zplprops(zfs_cmd_t *zc) 2221 { 2222 objset_t *os; 2223 int err; 2224 2225 /* XXX reading without owning */ 2226 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) 2227 return (err); 2228 2229 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 2230 2231 /* 2232 * NB: nvl_add_zplprop() will read the objset contents, 2233 * which we aren't supposed to do with a DS_MODE_USER 2234 * hold, because it could be inconsistent. 2235 */ 2236 if (zc->zc_nvlist_dst != NULL && 2237 !zc->zc_objset_stats.dds_inconsistent && 2238 dmu_objset_type(os) == DMU_OST_ZFS) { 2239 nvlist_t *nv; 2240 2241 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2242 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && 2243 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && 2244 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && 2245 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) 2246 err = put_nvlist(zc, nv); 2247 nvlist_free(nv); 2248 } else { 2249 err = SET_ERROR(ENOENT); 2250 } 2251 dmu_objset_rele(os, FTAG); 2252 return (err); 2253 } 2254 2255 static boolean_t 2256 dataset_name_hidden(const char *name) 2257 { 2258 /* 2259 * Skip over datasets that are not visible in this zone, 2260 * internal datasets (which have a $ in their name), and 2261 * temporary datasets (which have a % in their name). 2262 */ 2263 if (strchr(name, '$') != NULL) 2264 return (B_TRUE); 2265 if (strchr(name, '%') != NULL) 2266 return (B_TRUE); 2267 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 2268 return (B_TRUE); 2269 return (B_FALSE); 2270 } 2271 2272 /* 2273 * inputs: 2274 * zc_name name of filesystem 2275 * zc_cookie zap cursor 2276 * zc_nvlist_dst_size size of buffer for property nvlist 2277 * 2278 * outputs: 2279 * zc_name name of next filesystem 2280 * zc_cookie zap cursor 2281 * zc_objset_stats stats 2282 * zc_nvlist_dst property nvlist 2283 * zc_nvlist_dst_size size of property nvlist 2284 */ 2285 static int 2286 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 2287 { 2288 objset_t *os; 2289 int error; 2290 char *p; 2291 size_t orig_len = strlen(zc->zc_name); 2292 2293 top: 2294 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { 2295 if (error == ENOENT) 2296 error = SET_ERROR(ESRCH); 2297 return (error); 2298 } 2299 2300 p = strrchr(zc->zc_name, '/'); 2301 if (p == NULL || p[1] != '\0') 2302 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 2303 p = zc->zc_name + strlen(zc->zc_name); 2304 2305 do { 2306 error = dmu_dir_list_next(os, 2307 sizeof (zc->zc_name) - (p - zc->zc_name), p, 2308 NULL, &zc->zc_cookie); 2309 if (error == ENOENT) 2310 error = SET_ERROR(ESRCH); 2311 } while (error == 0 && dataset_name_hidden(zc->zc_name)); 2312 dmu_objset_rele(os, FTAG); 2313 2314 /* 2315 * If it's an internal dataset (ie. with a '$' in its name), 2316 * don't try to get stats for it, otherwise we'll return ENOENT. 2317 */ 2318 if (error == 0 && strchr(zc->zc_name, '$') == NULL) { 2319 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 2320 if (error == ENOENT) { 2321 /* We lost a race with destroy, get the next one. */ 2322 zc->zc_name[orig_len] = '\0'; 2323 goto top; 2324 } 2325 } 2326 return (error); 2327 } 2328 2329 /* 2330 * inputs: 2331 * zc_name name of filesystem 2332 * zc_cookie zap cursor 2333 * zc_nvlist_dst_size size of buffer for property nvlist 2334 * 2335 * outputs: 2336 * zc_name name of next snapshot 2337 * zc_objset_stats stats 2338 * zc_nvlist_dst property nvlist 2339 * zc_nvlist_dst_size size of property nvlist 2340 */ 2341 static int 2342 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 2343 { 2344 objset_t *os; 2345 int error; 2346 2347 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2348 if (error != 0) { 2349 return (error == ENOENT ? ESRCH : error); 2350 } 2351 2352 /* 2353 * A dataset name of maximum length cannot have any snapshots, 2354 * so exit immediately. 2355 */ 2356 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 2357 dmu_objset_rele(os, FTAG); 2358 return (SET_ERROR(ESRCH)); 2359 } 2360 2361 error = dmu_snapshot_list_next(os, 2362 sizeof (zc->zc_name) - strlen(zc->zc_name), 2363 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie, 2364 NULL); 2365 2366 if (error == 0) { 2367 dsl_dataset_t *ds; 2368 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool; 2369 2370 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds); 2371 if (error == 0) { 2372 objset_t *ossnap; 2373 2374 error = dmu_objset_from_ds(ds, &ossnap); 2375 if (error == 0) 2376 error = zfs_ioc_objset_stats_impl(zc, ossnap); 2377 dsl_dataset_rele(ds, FTAG); 2378 } 2379 } else if (error == ENOENT) { 2380 error = SET_ERROR(ESRCH); 2381 } 2382 2383 dmu_objset_rele(os, FTAG); 2384 /* if we failed, undo the @ that we tacked on to zc_name */ 2385 if (error != 0) 2386 *strchr(zc->zc_name, '@') = '\0'; 2387 return (error); 2388 } 2389 2390 static int 2391 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) 2392 { 2393 const char *propname = nvpair_name(pair); 2394 uint64_t *valary; 2395 unsigned int vallen; 2396 const char *domain; 2397 char *dash; 2398 zfs_userquota_prop_t type; 2399 uint64_t rid; 2400 uint64_t quota; 2401 zfsvfs_t *zfsvfs; 2402 int err; 2403 2404 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2405 nvlist_t *attrs; 2406 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2407 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2408 &pair) != 0) 2409 return (SET_ERROR(EINVAL)); 2410 } 2411 2412 /* 2413 * A correctly constructed propname is encoded as 2414 * userquota@<rid>-<domain>. 2415 */ 2416 if ((dash = strchr(propname, '-')) == NULL || 2417 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 || 2418 vallen != 3) 2419 return (SET_ERROR(EINVAL)); 2420 2421 domain = dash + 1; 2422 type = valary[0]; 2423 rid = valary[1]; 2424 quota = valary[2]; 2425 2426 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE); 2427 if (err == 0) { 2428 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); 2429 zfsvfs_rele(zfsvfs, FTAG); 2430 } 2431 2432 return (err); 2433 } 2434 2435 /* 2436 * If the named property is one that has a special function to set its value, 2437 * return 0 on success and a positive error code on failure; otherwise if it is 2438 * not one of the special properties handled by this function, return -1. 2439 * 2440 * XXX: It would be better for callers of the property interface if we handled 2441 * these special cases in dsl_prop.c (in the dsl layer). 2442 */ 2443 static int 2444 zfs_prop_set_special(const char *dsname, zprop_source_t source, 2445 nvpair_t *pair) 2446 { 2447 const char *propname = nvpair_name(pair); 2448 zfs_prop_t prop = zfs_name_to_prop(propname); 2449 uint64_t intval; 2450 int err = -1; 2451 2452 if (prop == ZPROP_INVAL) { 2453 if (zfs_prop_userquota(propname)) 2454 return (zfs_prop_set_userquota(dsname, pair)); 2455 return (-1); 2456 } 2457 2458 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2459 nvlist_t *attrs; 2460 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2461 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2462 &pair) == 0); 2463 } 2464 2465 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) 2466 return (-1); 2467 2468 VERIFY(0 == nvpair_value_uint64(pair, &intval)); 2469 2470 switch (prop) { 2471 case ZFS_PROP_QUOTA: 2472 err = dsl_dir_set_quota(dsname, source, intval); 2473 break; 2474 case ZFS_PROP_REFQUOTA: 2475 err = dsl_dataset_set_refquota(dsname, source, intval); 2476 break; 2477 case ZFS_PROP_FILESYSTEM_LIMIT: 2478 case ZFS_PROP_SNAPSHOT_LIMIT: 2479 if (intval == UINT64_MAX) { 2480 /* clearing the limit, just do it */ 2481 err = 0; 2482 } else { 2483 err = dsl_dir_activate_fs_ss_limit(dsname); 2484 } 2485 /* 2486 * Set err to -1 to force the zfs_set_prop_nvlist code down the 2487 * default path to set the value in the nvlist. 2488 */ 2489 if (err == 0) 2490 err = -1; 2491 break; 2492 case ZFS_PROP_RESERVATION: 2493 err = dsl_dir_set_reservation(dsname, source, intval); 2494 break; 2495 case ZFS_PROP_REFRESERVATION: 2496 err = dsl_dataset_set_refreservation(dsname, source, intval); 2497 break; 2498 case ZFS_PROP_VOLSIZE: 2499 err = zvol_set_volsize(dsname, intval); 2500 break; 2501 case ZFS_PROP_VERSION: 2502 { 2503 zfsvfs_t *zfsvfs; 2504 2505 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0) 2506 break; 2507 2508 err = zfs_set_version(zfsvfs, intval); 2509 zfsvfs_rele(zfsvfs, FTAG); 2510 2511 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { 2512 zfs_cmd_t *zc; 2513 2514 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 2515 (void) strcpy(zc->zc_name, dsname); 2516 (void) zfs_ioc_userspace_upgrade(zc); 2517 kmem_free(zc, sizeof (zfs_cmd_t)); 2518 } 2519 break; 2520 } 2521 default: 2522 err = -1; 2523 } 2524 2525 return (err); 2526 } 2527 2528 /* 2529 * This function is best effort. If it fails to set any of the given properties, 2530 * it continues to set as many as it can and returns the last error 2531 * encountered. If the caller provides a non-NULL errlist, it will be filled in 2532 * with the list of names of all the properties that failed along with the 2533 * corresponding error numbers. 2534 * 2535 * If every property is set successfully, zero is returned and errlist is not 2536 * modified. 2537 */ 2538 int 2539 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, 2540 nvlist_t *errlist) 2541 { 2542 nvpair_t *pair; 2543 nvpair_t *propval; 2544 int rv = 0; 2545 uint64_t intval; 2546 char *strval; 2547 nvlist_t *genericnvl = fnvlist_alloc(); 2548 nvlist_t *retrynvl = fnvlist_alloc(); 2549 2550 retry: 2551 pair = NULL; 2552 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2553 const char *propname = nvpair_name(pair); 2554 zfs_prop_t prop = zfs_name_to_prop(propname); 2555 int err = 0; 2556 2557 /* decode the property value */ 2558 propval = pair; 2559 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2560 nvlist_t *attrs; 2561 attrs = fnvpair_value_nvlist(pair); 2562 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2563 &propval) != 0) 2564 err = SET_ERROR(EINVAL); 2565 } 2566 2567 /* Validate value type */ 2568 if (err == 0 && prop == ZPROP_INVAL) { 2569 if (zfs_prop_user(propname)) { 2570 if (nvpair_type(propval) != DATA_TYPE_STRING) 2571 err = SET_ERROR(EINVAL); 2572 } else if (zfs_prop_userquota(propname)) { 2573 if (nvpair_type(propval) != 2574 DATA_TYPE_UINT64_ARRAY) 2575 err = SET_ERROR(EINVAL); 2576 } else { 2577 err = SET_ERROR(EINVAL); 2578 } 2579 } else if (err == 0) { 2580 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2581 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) 2582 err = SET_ERROR(EINVAL); 2583 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { 2584 const char *unused; 2585 2586 intval = fnvpair_value_uint64(propval); 2587 2588 switch (zfs_prop_get_type(prop)) { 2589 case PROP_TYPE_NUMBER: 2590 break; 2591 case PROP_TYPE_STRING: 2592 err = SET_ERROR(EINVAL); 2593 break; 2594 case PROP_TYPE_INDEX: 2595 if (zfs_prop_index_to_string(prop, 2596 intval, &unused) != 0) 2597 err = SET_ERROR(EINVAL); 2598 break; 2599 default: 2600 cmn_err(CE_PANIC, 2601 "unknown property type"); 2602 } 2603 } else { 2604 err = SET_ERROR(EINVAL); 2605 } 2606 } 2607 2608 /* Validate permissions */ 2609 if (err == 0) 2610 err = zfs_check_settable(dsname, pair, CRED()); 2611 2612 if (err == 0) { 2613 err = zfs_prop_set_special(dsname, source, pair); 2614 if (err == -1) { 2615 /* 2616 * For better performance we build up a list of 2617 * properties to set in a single transaction. 2618 */ 2619 err = nvlist_add_nvpair(genericnvl, pair); 2620 } else if (err != 0 && nvl != retrynvl) { 2621 /* 2622 * This may be a spurious error caused by 2623 * receiving quota and reservation out of order. 2624 * Try again in a second pass. 2625 */ 2626 err = nvlist_add_nvpair(retrynvl, pair); 2627 } 2628 } 2629 2630 if (err != 0) { 2631 if (errlist != NULL) 2632 fnvlist_add_int32(errlist, propname, err); 2633 rv = err; 2634 } 2635 } 2636 2637 if (nvl != retrynvl && !nvlist_empty(retrynvl)) { 2638 nvl = retrynvl; 2639 goto retry; 2640 } 2641 2642 if (!nvlist_empty(genericnvl) && 2643 dsl_props_set(dsname, source, genericnvl) != 0) { 2644 /* 2645 * If this fails, we still want to set as many properties as we 2646 * can, so try setting them individually. 2647 */ 2648 pair = NULL; 2649 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { 2650 const char *propname = nvpair_name(pair); 2651 int err = 0; 2652 2653 propval = pair; 2654 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2655 nvlist_t *attrs; 2656 attrs = fnvpair_value_nvlist(pair); 2657 propval = fnvlist_lookup_nvpair(attrs, 2658 ZPROP_VALUE); 2659 } 2660 2661 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2662 strval = fnvpair_value_string(propval); 2663 err = dsl_prop_set_string(dsname, propname, 2664 source, strval); 2665 } else { 2666 intval = fnvpair_value_uint64(propval); 2667 err = dsl_prop_set_int(dsname, propname, source, 2668 intval); 2669 } 2670 2671 if (err != 0) { 2672 if (errlist != NULL) { 2673 fnvlist_add_int32(errlist, propname, 2674 err); 2675 } 2676 rv = err; 2677 } 2678 } 2679 } 2680 nvlist_free(genericnvl); 2681 nvlist_free(retrynvl); 2682 2683 return (rv); 2684 } 2685 2686 /* 2687 * Check that all the properties are valid user properties. 2688 */ 2689 static int 2690 zfs_check_userprops(const char *fsname, nvlist_t *nvl) 2691 { 2692 nvpair_t *pair = NULL; 2693 int error = 0; 2694 2695 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2696 const char *propname = nvpair_name(pair); 2697 2698 if (!zfs_prop_user(propname) || 2699 nvpair_type(pair) != DATA_TYPE_STRING) 2700 return (SET_ERROR(EINVAL)); 2701 2702 if (error = zfs_secpolicy_write_perms(fsname, 2703 ZFS_DELEG_PERM_USERPROP, CRED())) 2704 return (error); 2705 2706 if (strlen(propname) >= ZAP_MAXNAMELEN) 2707 return (SET_ERROR(ENAMETOOLONG)); 2708 2709 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN) 2710 return (E2BIG); 2711 } 2712 return (0); 2713 } 2714 2715 static void 2716 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) 2717 { 2718 nvpair_t *pair; 2719 2720 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2721 2722 pair = NULL; 2723 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { 2724 if (nvlist_exists(skipped, nvpair_name(pair))) 2725 continue; 2726 2727 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); 2728 } 2729 } 2730 2731 static int 2732 clear_received_props(const char *dsname, nvlist_t *props, 2733 nvlist_t *skipped) 2734 { 2735 int err = 0; 2736 nvlist_t *cleared_props = NULL; 2737 props_skip(props, skipped, &cleared_props); 2738 if (!nvlist_empty(cleared_props)) { 2739 /* 2740 * Acts on local properties until the dataset has received 2741 * properties at least once on or after SPA_VERSION_RECVD_PROPS. 2742 */ 2743 zprop_source_t flags = (ZPROP_SRC_NONE | 2744 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0)); 2745 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL); 2746 } 2747 nvlist_free(cleared_props); 2748 return (err); 2749 } 2750 2751 /* 2752 * inputs: 2753 * zc_name name of filesystem 2754 * zc_value name of property to set 2755 * zc_nvlist_src{_size} nvlist of properties to apply 2756 * zc_cookie received properties flag 2757 * 2758 * outputs: 2759 * zc_nvlist_dst{_size} error for each unapplied received property 2760 */ 2761 static int 2762 zfs_ioc_set_prop(zfs_cmd_t *zc) 2763 { 2764 nvlist_t *nvl; 2765 boolean_t received = zc->zc_cookie; 2766 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : 2767 ZPROP_SRC_LOCAL); 2768 nvlist_t *errors; 2769 int error; 2770 2771 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2772 zc->zc_iflags, &nvl)) != 0) 2773 return (error); 2774 2775 if (received) { 2776 nvlist_t *origprops; 2777 2778 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) { 2779 (void) clear_received_props(zc->zc_name, 2780 origprops, nvl); 2781 nvlist_free(origprops); 2782 } 2783 2784 error = dsl_prop_set_hasrecvd(zc->zc_name); 2785 } 2786 2787 errors = fnvlist_alloc(); 2788 if (error == 0) 2789 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors); 2790 2791 if (zc->zc_nvlist_dst != NULL && errors != NULL) { 2792 (void) put_nvlist(zc, errors); 2793 } 2794 2795 nvlist_free(errors); 2796 nvlist_free(nvl); 2797 return (error); 2798 } 2799 2800 /* 2801 * inputs: 2802 * zc_name name of filesystem 2803 * zc_value name of property to inherit 2804 * zc_cookie revert to received value if TRUE 2805 * 2806 * outputs: none 2807 */ 2808 static int 2809 zfs_ioc_inherit_prop(zfs_cmd_t *zc) 2810 { 2811 const char *propname = zc->zc_value; 2812 zfs_prop_t prop = zfs_name_to_prop(propname); 2813 boolean_t received = zc->zc_cookie; 2814 zprop_source_t source = (received 2815 ? ZPROP_SRC_NONE /* revert to received value, if any */ 2816 : ZPROP_SRC_INHERITED); /* explicitly inherit */ 2817 2818 if (received) { 2819 nvlist_t *dummy; 2820 nvpair_t *pair; 2821 zprop_type_t type; 2822 int err; 2823 2824 /* 2825 * zfs_prop_set_special() expects properties in the form of an 2826 * nvpair with type info. 2827 */ 2828 if (prop == ZPROP_INVAL) { 2829 if (!zfs_prop_user(propname)) 2830 return (SET_ERROR(EINVAL)); 2831 2832 type = PROP_TYPE_STRING; 2833 } else if (prop == ZFS_PROP_VOLSIZE || 2834 prop == ZFS_PROP_VERSION) { 2835 return (SET_ERROR(EINVAL)); 2836 } else { 2837 type = zfs_prop_get_type(prop); 2838 } 2839 2840 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2841 2842 switch (type) { 2843 case PROP_TYPE_STRING: 2844 VERIFY(0 == nvlist_add_string(dummy, propname, "")); 2845 break; 2846 case PROP_TYPE_NUMBER: 2847 case PROP_TYPE_INDEX: 2848 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); 2849 break; 2850 default: 2851 nvlist_free(dummy); 2852 return (SET_ERROR(EINVAL)); 2853 } 2854 2855 pair = nvlist_next_nvpair(dummy, NULL); 2856 err = zfs_prop_set_special(zc->zc_name, source, pair); 2857 nvlist_free(dummy); 2858 if (err != -1) 2859 return (err); /* special property already handled */ 2860 } else { 2861 /* 2862 * Only check this in the non-received case. We want to allow 2863 * 'inherit -S' to revert non-inheritable properties like quota 2864 * and reservation to the received or default values even though 2865 * they are not considered inheritable. 2866 */ 2867 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) 2868 return (SET_ERROR(EINVAL)); 2869 } 2870 2871 /* property name has been validated by zfs_secpolicy_inherit_prop() */ 2872 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source)); 2873 } 2874 2875 static int 2876 zfs_ioc_pool_set_props(zfs_cmd_t *zc) 2877 { 2878 nvlist_t *props; 2879 spa_t *spa; 2880 int error; 2881 nvpair_t *pair; 2882 2883 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2884 zc->zc_iflags, &props)) 2885 return (error); 2886 2887 /* 2888 * If the only property is the configfile, then just do a spa_lookup() 2889 * to handle the faulted case. 2890 */ 2891 pair = nvlist_next_nvpair(props, NULL); 2892 if (pair != NULL && strcmp(nvpair_name(pair), 2893 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && 2894 nvlist_next_nvpair(props, pair) == NULL) { 2895 mutex_enter(&spa_namespace_lock); 2896 if ((spa = spa_lookup(zc->zc_name)) != NULL) { 2897 spa_configfile_set(spa, props, B_FALSE); 2898 spa_config_sync(spa, B_FALSE, B_TRUE); 2899 } 2900 mutex_exit(&spa_namespace_lock); 2901 if (spa != NULL) { 2902 nvlist_free(props); 2903 return (0); 2904 } 2905 } 2906 2907 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2908 nvlist_free(props); 2909 return (error); 2910 } 2911 2912 error = spa_prop_set(spa, props); 2913 2914 nvlist_free(props); 2915 spa_close(spa, FTAG); 2916 2917 return (error); 2918 } 2919 2920 static int 2921 zfs_ioc_pool_get_props(zfs_cmd_t *zc) 2922 { 2923 spa_t *spa; 2924 int error; 2925 nvlist_t *nvp = NULL; 2926 2927 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2928 /* 2929 * If the pool is faulted, there may be properties we can still 2930 * get (such as altroot and cachefile), so attempt to get them 2931 * anyway. 2932 */ 2933 mutex_enter(&spa_namespace_lock); 2934 if ((spa = spa_lookup(zc->zc_name)) != NULL) 2935 error = spa_prop_get(spa, &nvp); 2936 mutex_exit(&spa_namespace_lock); 2937 } else { 2938 error = spa_prop_get(spa, &nvp); 2939 spa_close(spa, FTAG); 2940 } 2941 2942 if (error == 0 && zc->zc_nvlist_dst != NULL) 2943 error = put_nvlist(zc, nvp); 2944 else 2945 error = SET_ERROR(EFAULT); 2946 2947 nvlist_free(nvp); 2948 return (error); 2949 } 2950 2951 /* 2952 * inputs: 2953 * zc_name name of filesystem 2954 * zc_nvlist_src{_size} nvlist of delegated permissions 2955 * zc_perm_action allow/unallow flag 2956 * 2957 * outputs: none 2958 */ 2959 static int 2960 zfs_ioc_set_fsacl(zfs_cmd_t *zc) 2961 { 2962 int error; 2963 nvlist_t *fsaclnv = NULL; 2964 2965 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2966 zc->zc_iflags, &fsaclnv)) != 0) 2967 return (error); 2968 2969 /* 2970 * Verify nvlist is constructed correctly 2971 */ 2972 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 2973 nvlist_free(fsaclnv); 2974 return (SET_ERROR(EINVAL)); 2975 } 2976 2977 /* 2978 * If we don't have PRIV_SYS_MOUNT, then validate 2979 * that user is allowed to hand out each permission in 2980 * the nvlist(s) 2981 */ 2982 2983 error = secpolicy_zfs(CRED()); 2984 if (error != 0) { 2985 if (zc->zc_perm_action == B_FALSE) { 2986 error = dsl_deleg_can_allow(zc->zc_name, 2987 fsaclnv, CRED()); 2988 } else { 2989 error = dsl_deleg_can_unallow(zc->zc_name, 2990 fsaclnv, CRED()); 2991 } 2992 } 2993 2994 if (error == 0) 2995 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 2996 2997 nvlist_free(fsaclnv); 2998 return (error); 2999 } 3000 3001 /* 3002 * inputs: 3003 * zc_name name of filesystem 3004 * 3005 * outputs: 3006 * zc_nvlist_src{_size} nvlist of delegated permissions 3007 */ 3008 static int 3009 zfs_ioc_get_fsacl(zfs_cmd_t *zc) 3010 { 3011 nvlist_t *nvp; 3012 int error; 3013 3014 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 3015 error = put_nvlist(zc, nvp); 3016 nvlist_free(nvp); 3017 } 3018 3019 return (error); 3020 } 3021 3022 /* 3023 * Search the vfs list for a specified resource. Returns a pointer to it 3024 * or NULL if no suitable entry is found. The caller of this routine 3025 * is responsible for releasing the returned vfs pointer. 3026 */ 3027 static vfs_t * 3028 zfs_get_vfs(const char *resource) 3029 { 3030 struct vfs *vfsp; 3031 struct vfs *vfs_found = NULL; 3032 3033 vfs_list_read_lock(); 3034 vfsp = rootvfs; 3035 do { 3036 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 3037 VFS_HOLD(vfsp); 3038 vfs_found = vfsp; 3039 break; 3040 } 3041 vfsp = vfsp->vfs_next; 3042 } while (vfsp != rootvfs); 3043 vfs_list_unlock(); 3044 return (vfs_found); 3045 } 3046 3047 /* ARGSUSED */ 3048 static void 3049 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 3050 { 3051 zfs_creat_t *zct = arg; 3052 3053 zfs_create_fs(os, cr, zct->zct_zplprops, tx); 3054 } 3055 3056 #define ZFS_PROP_UNDEFINED ((uint64_t)-1) 3057 3058 /* 3059 * inputs: 3060 * os parent objset pointer (NULL if root fs) 3061 * fuids_ok fuids allowed in this version of the spa? 3062 * sa_ok SAs allowed in this version of the spa? 3063 * createprops list of properties requested by creator 3064 * 3065 * outputs: 3066 * zplprops values for the zplprops we attach to the master node object 3067 * is_ci true if requested file system will be purely case-insensitive 3068 * 3069 * Determine the settings for utf8only, normalization and 3070 * casesensitivity. Specific values may have been requested by the 3071 * creator and/or we can inherit values from the parent dataset. If 3072 * the file system is of too early a vintage, a creator can not 3073 * request settings for these properties, even if the requested 3074 * setting is the default value. We don't actually want to create dsl 3075 * properties for these, so remove them from the source nvlist after 3076 * processing. 3077 */ 3078 static int 3079 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, 3080 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops, 3081 nvlist_t *zplprops, boolean_t *is_ci) 3082 { 3083 uint64_t sense = ZFS_PROP_UNDEFINED; 3084 uint64_t norm = ZFS_PROP_UNDEFINED; 3085 uint64_t u8 = ZFS_PROP_UNDEFINED; 3086 3087 ASSERT(zplprops != NULL); 3088 3089 /* 3090 * Pull out creator prop choices, if any. 3091 */ 3092 if (createprops) { 3093 (void) nvlist_lookup_uint64(createprops, 3094 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); 3095 (void) nvlist_lookup_uint64(createprops, 3096 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); 3097 (void) nvlist_remove_all(createprops, 3098 zfs_prop_to_name(ZFS_PROP_NORMALIZE)); 3099 (void) nvlist_lookup_uint64(createprops, 3100 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); 3101 (void) nvlist_remove_all(createprops, 3102 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 3103 (void) nvlist_lookup_uint64(createprops, 3104 zfs_prop_to_name(ZFS_PROP_CASE), &sense); 3105 (void) nvlist_remove_all(createprops, 3106 zfs_prop_to_name(ZFS_PROP_CASE)); 3107 } 3108 3109 /* 3110 * If the zpl version requested is whacky or the file system 3111 * or pool is version is too "young" to support normalization 3112 * and the creator tried to set a value for one of the props, 3113 * error out. 3114 */ 3115 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || 3116 (zplver >= ZPL_VERSION_FUID && !fuids_ok) || 3117 (zplver >= ZPL_VERSION_SA && !sa_ok) || 3118 (zplver < ZPL_VERSION_NORMALIZATION && 3119 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || 3120 sense != ZFS_PROP_UNDEFINED))) 3121 return (SET_ERROR(ENOTSUP)); 3122 3123 /* 3124 * Put the version in the zplprops 3125 */ 3126 VERIFY(nvlist_add_uint64(zplprops, 3127 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); 3128 3129 if (norm == ZFS_PROP_UNDEFINED) 3130 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); 3131 VERIFY(nvlist_add_uint64(zplprops, 3132 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); 3133 3134 /* 3135 * If we're normalizing, names must always be valid UTF-8 strings. 3136 */ 3137 if (norm) 3138 u8 = 1; 3139 if (u8 == ZFS_PROP_UNDEFINED) 3140 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); 3141 VERIFY(nvlist_add_uint64(zplprops, 3142 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); 3143 3144 if (sense == ZFS_PROP_UNDEFINED) 3145 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); 3146 VERIFY(nvlist_add_uint64(zplprops, 3147 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); 3148 3149 if (is_ci) 3150 *is_ci = (sense == ZFS_CASE_INSENSITIVE); 3151 3152 return (0); 3153 } 3154 3155 static int 3156 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, 3157 nvlist_t *zplprops, boolean_t *is_ci) 3158 { 3159 boolean_t fuids_ok, sa_ok; 3160 uint64_t zplver = ZPL_VERSION; 3161 objset_t *os = NULL; 3162 char parentname[MAXNAMELEN]; 3163 char *cp; 3164 spa_t *spa; 3165 uint64_t spa_vers; 3166 int error; 3167 3168 (void) strlcpy(parentname, dataset, sizeof (parentname)); 3169 cp = strrchr(parentname, '/'); 3170 ASSERT(cp != NULL); 3171 cp[0] = '\0'; 3172 3173 if ((error = spa_open(dataset, &spa, FTAG)) != 0) 3174 return (error); 3175 3176 spa_vers = spa_version(spa); 3177 spa_close(spa, FTAG); 3178 3179 zplver = zfs_zpl_version_map(spa_vers); 3180 fuids_ok = (zplver >= ZPL_VERSION_FUID); 3181 sa_ok = (zplver >= ZPL_VERSION_SA); 3182 3183 /* 3184 * Open parent object set so we can inherit zplprop values. 3185 */ 3186 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) 3187 return (error); 3188 3189 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops, 3190 zplprops, is_ci); 3191 dmu_objset_rele(os, FTAG); 3192 return (error); 3193 } 3194 3195 static int 3196 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, 3197 nvlist_t *zplprops, boolean_t *is_ci) 3198 { 3199 boolean_t fuids_ok; 3200 boolean_t sa_ok; 3201 uint64_t zplver = ZPL_VERSION; 3202 int error; 3203 3204 zplver = zfs_zpl_version_map(spa_vers); 3205 fuids_ok = (zplver >= ZPL_VERSION_FUID); 3206 sa_ok = (zplver >= ZPL_VERSION_SA); 3207 3208 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok, 3209 createprops, zplprops, is_ci); 3210 return (error); 3211 } 3212 3213 /* 3214 * innvl: { 3215 * "type" -> dmu_objset_type_t (int32) 3216 * (optional) "props" -> { prop -> value } 3217 * } 3218 * 3219 * outnvl: propname -> error code (int32) 3220 */ 3221 static int 3222 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3223 { 3224 int error = 0; 3225 zfs_creat_t zct = { 0 }; 3226 nvlist_t *nvprops = NULL; 3227 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 3228 int32_t type32; 3229 dmu_objset_type_t type; 3230 boolean_t is_insensitive = B_FALSE; 3231 3232 if (nvlist_lookup_int32(innvl, "type", &type32) != 0) 3233 return (SET_ERROR(EINVAL)); 3234 type = type32; 3235 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); 3236 3237 switch (type) { 3238 case DMU_OST_ZFS: 3239 cbfunc = zfs_create_cb; 3240 break; 3241 3242 case DMU_OST_ZVOL: 3243 cbfunc = zvol_create_cb; 3244 break; 3245 3246 default: 3247 cbfunc = NULL; 3248 break; 3249 } 3250 if (strchr(fsname, '@') || 3251 strchr(fsname, '%')) 3252 return (SET_ERROR(EINVAL)); 3253 3254 zct.zct_props = nvprops; 3255 3256 if (cbfunc == NULL) 3257 return (SET_ERROR(EINVAL)); 3258 3259 if (type == DMU_OST_ZVOL) { 3260 uint64_t volsize, volblocksize; 3261 3262 if (nvprops == NULL) 3263 return (SET_ERROR(EINVAL)); 3264 if (nvlist_lookup_uint64(nvprops, 3265 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0) 3266 return (SET_ERROR(EINVAL)); 3267 3268 if ((error = nvlist_lookup_uint64(nvprops, 3269 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3270 &volblocksize)) != 0 && error != ENOENT) 3271 return (SET_ERROR(EINVAL)); 3272 3273 if (error != 0) 3274 volblocksize = zfs_prop_default_numeric( 3275 ZFS_PROP_VOLBLOCKSIZE); 3276 3277 if ((error = zvol_check_volblocksize( 3278 volblocksize)) != 0 || 3279 (error = zvol_check_volsize(volsize, 3280 volblocksize)) != 0) 3281 return (error); 3282 } else if (type == DMU_OST_ZFS) { 3283 int error; 3284 3285 /* 3286 * We have to have normalization and 3287 * case-folding flags correct when we do the 3288 * file system creation, so go figure them out 3289 * now. 3290 */ 3291 VERIFY(nvlist_alloc(&zct.zct_zplprops, 3292 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3293 error = zfs_fill_zplprops(fsname, nvprops, 3294 zct.zct_zplprops, &is_insensitive); 3295 if (error != 0) { 3296 nvlist_free(zct.zct_zplprops); 3297 return (error); 3298 } 3299 } 3300 3301 error = dmu_objset_create(fsname, type, 3302 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); 3303 nvlist_free(zct.zct_zplprops); 3304 3305 /* 3306 * It would be nice to do this atomically. 3307 */ 3308 if (error == 0) { 3309 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3310 nvprops, outnvl); 3311 if (error != 0) 3312 (void) dsl_destroy_head(fsname); 3313 } 3314 return (error); 3315 } 3316 3317 /* 3318 * innvl: { 3319 * "origin" -> name of origin snapshot 3320 * (optional) "props" -> { prop -> value } 3321 * } 3322 * 3323 * outnvl: propname -> error code (int32) 3324 */ 3325 static int 3326 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3327 { 3328 int error = 0; 3329 nvlist_t *nvprops = NULL; 3330 char *origin_name; 3331 3332 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0) 3333 return (SET_ERROR(EINVAL)); 3334 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); 3335 3336 if (strchr(fsname, '@') || 3337 strchr(fsname, '%')) 3338 return (SET_ERROR(EINVAL)); 3339 3340 if (dataset_namecheck(origin_name, NULL, NULL) != 0) 3341 return (SET_ERROR(EINVAL)); 3342 error = dmu_objset_clone(fsname, origin_name); 3343 if (error != 0) 3344 return (error); 3345 3346 /* 3347 * It would be nice to do this atomically. 3348 */ 3349 if (error == 0) { 3350 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3351 nvprops, outnvl); 3352 if (error != 0) 3353 (void) dsl_destroy_head(fsname); 3354 } 3355 return (error); 3356 } 3357 3358 /* 3359 * innvl: { 3360 * "snaps" -> { snapshot1, snapshot2 } 3361 * (optional) "props" -> { prop -> value (string) } 3362 * } 3363 * 3364 * outnvl: snapshot -> error code (int32) 3365 */ 3366 static int 3367 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3368 { 3369 nvlist_t *snaps; 3370 nvlist_t *props = NULL; 3371 int error, poollen; 3372 nvpair_t *pair; 3373 3374 (void) nvlist_lookup_nvlist(innvl, "props", &props); 3375 if ((error = zfs_check_userprops(poolname, props)) != 0) 3376 return (error); 3377 3378 if (!nvlist_empty(props) && 3379 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS)) 3380 return (SET_ERROR(ENOTSUP)); 3381 3382 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3383 return (SET_ERROR(EINVAL)); 3384 poollen = strlen(poolname); 3385 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3386 pair = nvlist_next_nvpair(snaps, pair)) { 3387 const char *name = nvpair_name(pair); 3388 const char *cp = strchr(name, '@'); 3389 3390 /* 3391 * The snap name must contain an @, and the part after it must 3392 * contain only valid characters. 3393 */ 3394 if (cp == NULL || 3395 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3396 return (SET_ERROR(EINVAL)); 3397 3398 /* 3399 * The snap must be in the specified pool. 3400 */ 3401 if (strncmp(name, poolname, poollen) != 0 || 3402 (name[poollen] != '/' && name[poollen] != '@')) 3403 return (SET_ERROR(EXDEV)); 3404 3405 /* This must be the only snap of this fs. */ 3406 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair); 3407 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) { 3408 if (strncmp(name, nvpair_name(pair2), cp - name + 1) 3409 == 0) { 3410 return (SET_ERROR(EXDEV)); 3411 } 3412 } 3413 } 3414 3415 error = dsl_dataset_snapshot(snaps, props, outnvl); 3416 return (error); 3417 } 3418 3419 /* 3420 * innvl: "message" -> string 3421 */ 3422 /* ARGSUSED */ 3423 static int 3424 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl) 3425 { 3426 char *message; 3427 spa_t *spa; 3428 int error; 3429 char *poolname; 3430 3431 /* 3432 * The poolname in the ioctl is not set, we get it from the TSD, 3433 * which was set at the end of the last successful ioctl that allows 3434 * logging. The secpolicy func already checked that it is set. 3435 * Only one log ioctl is allowed after each successful ioctl, so 3436 * we clear the TSD here. 3437 */ 3438 poolname = tsd_get(zfs_allow_log_key); 3439 (void) tsd_set(zfs_allow_log_key, NULL); 3440 error = spa_open(poolname, &spa, FTAG); 3441 strfree(poolname); 3442 if (error != 0) 3443 return (error); 3444 3445 if (nvlist_lookup_string(innvl, "message", &message) != 0) { 3446 spa_close(spa, FTAG); 3447 return (SET_ERROR(EINVAL)); 3448 } 3449 3450 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 3451 spa_close(spa, FTAG); 3452 return (SET_ERROR(ENOTSUP)); 3453 } 3454 3455 error = spa_history_log(spa, message); 3456 spa_close(spa, FTAG); 3457 return (error); 3458 } 3459 3460 /* 3461 * The dp_config_rwlock must not be held when calling this, because the 3462 * unmount may need to write out data. 3463 * 3464 * This function is best-effort. Callers must deal gracefully if it 3465 * remains mounted (or is remounted after this call). 3466 * 3467 * Returns 0 if the argument is not a snapshot, or it is not currently a 3468 * filesystem, or we were able to unmount it. Returns error code otherwise. 3469 */ 3470 int 3471 zfs_unmount_snap(const char *snapname) 3472 { 3473 vfs_t *vfsp; 3474 zfsvfs_t *zfsvfs; 3475 int err; 3476 3477 if (strchr(snapname, '@') == NULL) 3478 return (0); 3479 3480 vfsp = zfs_get_vfs(snapname); 3481 if (vfsp == NULL) 3482 return (0); 3483 3484 zfsvfs = vfsp->vfs_data; 3485 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os))); 3486 3487 err = vn_vfswlock(vfsp->vfs_vnodecovered); 3488 VFS_RELE(vfsp); 3489 if (err != 0) 3490 return (SET_ERROR(err)); 3491 3492 /* 3493 * Always force the unmount for snapshots. 3494 */ 3495 (void) dounmount(vfsp, MS_FORCE, kcred); 3496 return (0); 3497 } 3498 3499 /* ARGSUSED */ 3500 static int 3501 zfs_unmount_snap_cb(const char *snapname, void *arg) 3502 { 3503 return (zfs_unmount_snap(snapname)); 3504 } 3505 3506 /* 3507 * When a clone is destroyed, its origin may also need to be destroyed, 3508 * in which case it must be unmounted. This routine will do that unmount 3509 * if necessary. 3510 */ 3511 void 3512 zfs_destroy_unmount_origin(const char *fsname) 3513 { 3514 int error; 3515 objset_t *os; 3516 dsl_dataset_t *ds; 3517 3518 error = dmu_objset_hold(fsname, FTAG, &os); 3519 if (error != 0) 3520 return; 3521 ds = dmu_objset_ds(os); 3522 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) { 3523 char originname[MAXNAMELEN]; 3524 dsl_dataset_name(ds->ds_prev, originname); 3525 dmu_objset_rele(os, FTAG); 3526 (void) zfs_unmount_snap(originname); 3527 } else { 3528 dmu_objset_rele(os, FTAG); 3529 } 3530 } 3531 3532 /* 3533 * innvl: { 3534 * "snaps" -> { snapshot1, snapshot2 } 3535 * (optional boolean) "defer" 3536 * } 3537 * 3538 * outnvl: snapshot -> error code (int32) 3539 * 3540 */ 3541 /* ARGSUSED */ 3542 static int 3543 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3544 { 3545 nvlist_t *snaps; 3546 nvpair_t *pair; 3547 boolean_t defer; 3548 3549 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3550 return (SET_ERROR(EINVAL)); 3551 defer = nvlist_exists(innvl, "defer"); 3552 3553 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3554 pair = nvlist_next_nvpair(snaps, pair)) { 3555 (void) zfs_unmount_snap(nvpair_name(pair)); 3556 } 3557 3558 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl)); 3559 } 3560 3561 /* 3562 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>. 3563 * All bookmarks must be in the same pool. 3564 * 3565 * innvl: { 3566 * bookmark1 -> snapshot1, bookmark2 -> snapshot2 3567 * } 3568 * 3569 * outnvl: bookmark -> error code (int32) 3570 * 3571 */ 3572 /* ARGSUSED */ 3573 static int 3574 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3575 { 3576 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3577 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3578 char *snap_name; 3579 3580 /* 3581 * Verify the snapshot argument. 3582 */ 3583 if (nvpair_value_string(pair, &snap_name) != 0) 3584 return (SET_ERROR(EINVAL)); 3585 3586 3587 /* Verify that the keys (bookmarks) are unique */ 3588 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair); 3589 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) { 3590 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0) 3591 return (SET_ERROR(EINVAL)); 3592 } 3593 } 3594 3595 return (dsl_bookmark_create(innvl, outnvl)); 3596 } 3597 3598 /* 3599 * innvl: { 3600 * property 1, property 2, ... 3601 * } 3602 * 3603 * outnvl: { 3604 * bookmark name 1 -> { property 1, property 2, ... }, 3605 * bookmark name 2 -> { property 1, property 2, ... } 3606 * } 3607 * 3608 */ 3609 static int 3610 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3611 { 3612 return (dsl_get_bookmarks(fsname, innvl, outnvl)); 3613 } 3614 3615 /* 3616 * innvl: { 3617 * bookmark name 1, bookmark name 2 3618 * } 3619 * 3620 * outnvl: bookmark -> error code (int32) 3621 * 3622 */ 3623 static int 3624 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl, 3625 nvlist_t *outnvl) 3626 { 3627 int error, poollen; 3628 3629 poollen = strlen(poolname); 3630 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3631 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3632 const char *name = nvpair_name(pair); 3633 const char *cp = strchr(name, '#'); 3634 3635 /* 3636 * The bookmark name must contain an #, and the part after it 3637 * must contain only valid characters. 3638 */ 3639 if (cp == NULL || 3640 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3641 return (SET_ERROR(EINVAL)); 3642 3643 /* 3644 * The bookmark must be in the specified pool. 3645 */ 3646 if (strncmp(name, poolname, poollen) != 0 || 3647 (name[poollen] != '/' && name[poollen] != '#')) 3648 return (SET_ERROR(EXDEV)); 3649 } 3650 3651 error = dsl_bookmark_destroy(innvl, outnvl); 3652 return (error); 3653 } 3654 3655 /* 3656 * inputs: 3657 * zc_name name of dataset to destroy 3658 * zc_objset_type type of objset 3659 * zc_defer_destroy mark for deferred destroy 3660 * 3661 * outputs: none 3662 */ 3663 static int 3664 zfs_ioc_destroy(zfs_cmd_t *zc) 3665 { 3666 int err; 3667 3668 if (zc->zc_objset_type == DMU_OST_ZFS) { 3669 err = zfs_unmount_snap(zc->zc_name); 3670 if (err != 0) 3671 return (err); 3672 } 3673 3674 if (strchr(zc->zc_name, '@')) 3675 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy); 3676 else 3677 err = dsl_destroy_head(zc->zc_name); 3678 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 3679 (void) zvol_remove_minor(zc->zc_name); 3680 return (err); 3681 } 3682 3683 /* 3684 * fsname is name of dataset to rollback (to most recent snapshot) 3685 * 3686 * innvl is not used. 3687 * 3688 * outnvl: "target" -> name of most recent snapshot 3689 * } 3690 */ 3691 /* ARGSUSED */ 3692 static int 3693 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl) 3694 { 3695 zfsvfs_t *zfsvfs; 3696 int error; 3697 3698 if (getzfsvfs(fsname, &zfsvfs) == 0) { 3699 error = zfs_suspend_fs(zfsvfs); 3700 if (error == 0) { 3701 int resume_err; 3702 3703 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl); 3704 resume_err = zfs_resume_fs(zfsvfs, fsname); 3705 error = error ? error : resume_err; 3706 } 3707 VFS_RELE(zfsvfs->z_vfs); 3708 } else { 3709 error = dsl_dataset_rollback(fsname, NULL, outnvl); 3710 } 3711 return (error); 3712 } 3713 3714 static int 3715 recursive_unmount(const char *fsname, void *arg) 3716 { 3717 const char *snapname = arg; 3718 char fullname[MAXNAMELEN]; 3719 3720 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname); 3721 return (zfs_unmount_snap(fullname)); 3722 } 3723 3724 /* 3725 * inputs: 3726 * zc_name old name of dataset 3727 * zc_value new name of dataset 3728 * zc_cookie recursive flag (only valid for snapshots) 3729 * 3730 * outputs: none 3731 */ 3732 static int 3733 zfs_ioc_rename(zfs_cmd_t *zc) 3734 { 3735 boolean_t recursive = zc->zc_cookie & 1; 3736 char *at; 3737 3738 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3739 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3740 strchr(zc->zc_value, '%')) 3741 return (SET_ERROR(EINVAL)); 3742 3743 at = strchr(zc->zc_name, '@'); 3744 if (at != NULL) { 3745 /* snaps must be in same fs */ 3746 int error; 3747 3748 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1)) 3749 return (SET_ERROR(EXDEV)); 3750 *at = '\0'; 3751 if (zc->zc_objset_type == DMU_OST_ZFS) { 3752 error = dmu_objset_find(zc->zc_name, 3753 recursive_unmount, at + 1, 3754 recursive ? DS_FIND_CHILDREN : 0); 3755 if (error != 0) { 3756 *at = '@'; 3757 return (error); 3758 } 3759 } 3760 error = dsl_dataset_rename_snapshot(zc->zc_name, 3761 at + 1, strchr(zc->zc_value, '@') + 1, recursive); 3762 *at = '@'; 3763 3764 return (error); 3765 } else { 3766 if (zc->zc_objset_type == DMU_OST_ZVOL) 3767 (void) zvol_remove_minor(zc->zc_name); 3768 return (dsl_dir_rename(zc->zc_name, zc->zc_value)); 3769 } 3770 } 3771 3772 static int 3773 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3774 { 3775 const char *propname = nvpair_name(pair); 3776 boolean_t issnap = (strchr(dsname, '@') != NULL); 3777 zfs_prop_t prop = zfs_name_to_prop(propname); 3778 uint64_t intval; 3779 int err; 3780 3781 if (prop == ZPROP_INVAL) { 3782 if (zfs_prop_user(propname)) { 3783 if (err = zfs_secpolicy_write_perms(dsname, 3784 ZFS_DELEG_PERM_USERPROP, cr)) 3785 return (err); 3786 return (0); 3787 } 3788 3789 if (!issnap && zfs_prop_userquota(propname)) { 3790 const char *perm = NULL; 3791 const char *uq_prefix = 3792 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3793 const char *gq_prefix = 3794 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3795 3796 if (strncmp(propname, uq_prefix, 3797 strlen(uq_prefix)) == 0) { 3798 perm = ZFS_DELEG_PERM_USERQUOTA; 3799 } else if (strncmp(propname, gq_prefix, 3800 strlen(gq_prefix)) == 0) { 3801 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3802 } else { 3803 /* USERUSED and GROUPUSED are read-only */ 3804 return (SET_ERROR(EINVAL)); 3805 } 3806 3807 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3808 return (err); 3809 return (0); 3810 } 3811 3812 return (SET_ERROR(EINVAL)); 3813 } 3814 3815 if (issnap) 3816 return (SET_ERROR(EINVAL)); 3817 3818 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3819 /* 3820 * dsl_prop_get_all_impl() returns properties in this 3821 * format. 3822 */ 3823 nvlist_t *attrs; 3824 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3825 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3826 &pair) == 0); 3827 } 3828 3829 /* 3830 * Check that this value is valid for this pool version 3831 */ 3832 switch (prop) { 3833 case ZFS_PROP_COMPRESSION: 3834 /* 3835 * If the user specified gzip compression, make sure 3836 * the SPA supports it. We ignore any errors here since 3837 * we'll catch them later. 3838 */ 3839 if (nvpair_value_uint64(pair, &intval) == 0) { 3840 if (intval >= ZIO_COMPRESS_GZIP_1 && 3841 intval <= ZIO_COMPRESS_GZIP_9 && 3842 zfs_earlier_version(dsname, 3843 SPA_VERSION_GZIP_COMPRESSION)) { 3844 return (SET_ERROR(ENOTSUP)); 3845 } 3846 3847 if (intval == ZIO_COMPRESS_ZLE && 3848 zfs_earlier_version(dsname, 3849 SPA_VERSION_ZLE_COMPRESSION)) 3850 return (SET_ERROR(ENOTSUP)); 3851 3852 if (intval == ZIO_COMPRESS_LZ4) { 3853 spa_t *spa; 3854 3855 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3856 return (err); 3857 3858 if (!spa_feature_is_enabled(spa, 3859 SPA_FEATURE_LZ4_COMPRESS)) { 3860 spa_close(spa, FTAG); 3861 return (SET_ERROR(ENOTSUP)); 3862 } 3863 spa_close(spa, FTAG); 3864 } 3865 3866 /* 3867 * If this is a bootable dataset then 3868 * verify that the compression algorithm 3869 * is supported for booting. We must return 3870 * something other than ENOTSUP since it 3871 * implies a downrev pool version. 3872 */ 3873 if (zfs_is_bootfs(dsname) && 3874 !BOOTFS_COMPRESS_VALID(intval)) { 3875 return (SET_ERROR(ERANGE)); 3876 } 3877 } 3878 break; 3879 3880 case ZFS_PROP_COPIES: 3881 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3882 return (SET_ERROR(ENOTSUP)); 3883 break; 3884 3885 case ZFS_PROP_RECORDSIZE: 3886 /* Record sizes above 128k need the feature to be enabled */ 3887 if (nvpair_value_uint64(pair, &intval) == 0 && 3888 intval > SPA_OLD_MAXBLOCKSIZE) { 3889 spa_t *spa; 3890 3891 /* 3892 * If this is a bootable dataset then 3893 * the we don't allow large (>128K) blocks, 3894 * because GRUB doesn't support them. 3895 */ 3896 if (zfs_is_bootfs(dsname) && 3897 intval > SPA_OLD_MAXBLOCKSIZE) { 3898 return (SET_ERROR(ERANGE)); 3899 } 3900 3901 /* 3902 * We don't allow setting the property above 1MB, 3903 * unless the tunable has been changed. 3904 */ 3905 if (intval > zfs_max_recordsize || 3906 intval > SPA_MAXBLOCKSIZE) 3907 return (SET_ERROR(ERANGE)); 3908 3909 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3910 return (err); 3911 3912 if (!spa_feature_is_enabled(spa, 3913 SPA_FEATURE_LARGE_BLOCKS)) { 3914 spa_close(spa, FTAG); 3915 return (SET_ERROR(ENOTSUP)); 3916 } 3917 spa_close(spa, FTAG); 3918 } 3919 break; 3920 3921 case ZFS_PROP_SHARESMB: 3922 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3923 return (SET_ERROR(ENOTSUP)); 3924 break; 3925 3926 case ZFS_PROP_ACLINHERIT: 3927 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3928 nvpair_value_uint64(pair, &intval) == 0) { 3929 if (intval == ZFS_ACL_PASSTHROUGH_X && 3930 zfs_earlier_version(dsname, 3931 SPA_VERSION_PASSTHROUGH_X)) 3932 return (SET_ERROR(ENOTSUP)); 3933 } 3934 break; 3935 3936 case ZFS_PROP_CHECKSUM: 3937 case ZFS_PROP_DEDUP: 3938 { 3939 spa_feature_t feature; 3940 spa_t *spa; 3941 3942 /* dedup feature version checks */ 3943 if (prop == ZFS_PROP_DEDUP && 3944 zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3945 return (SET_ERROR(ENOTSUP)); 3946 3947 if (nvpair_value_uint64(pair, &intval) != 0) 3948 return (SET_ERROR(EINVAL)); 3949 3950 /* check prop value is enabled in features */ 3951 feature = zio_checksum_to_feature(intval & ZIO_CHECKSUM_MASK); 3952 if (feature == SPA_FEATURE_NONE) 3953 break; 3954 3955 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3956 return (err); 3957 /* 3958 * Salted checksums are not supported on root pools. 3959 */ 3960 if (spa_bootfs(spa) != 0 && 3961 intval < ZIO_CHECKSUM_FUNCTIONS && 3962 (zio_checksum_table[intval].ci_flags & 3963 ZCHECKSUM_FLAG_SALTED)) { 3964 spa_close(spa, FTAG); 3965 return (SET_ERROR(ERANGE)); 3966 } 3967 if (!spa_feature_is_enabled(spa, feature)) { 3968 spa_close(spa, FTAG); 3969 return (SET_ERROR(ENOTSUP)); 3970 } 3971 spa_close(spa, FTAG); 3972 break; 3973 } 3974 } 3975 3976 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3977 } 3978 3979 /* 3980 * Checks for a race condition to make sure we don't increment a feature flag 3981 * multiple times. 3982 */ 3983 static int 3984 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx) 3985 { 3986 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3987 spa_feature_t *featurep = arg; 3988 3989 if (!spa_feature_is_active(spa, *featurep)) 3990 return (0); 3991 else 3992 return (SET_ERROR(EBUSY)); 3993 } 3994 3995 /* 3996 * The callback invoked on feature activation in the sync task caused by 3997 * zfs_prop_activate_feature. 3998 */ 3999 static void 4000 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx) 4001 { 4002 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 4003 spa_feature_t *featurep = arg; 4004 4005 spa_feature_incr(spa, *featurep, tx); 4006 } 4007 4008 /* 4009 * Activates a feature on a pool in response to a property setting. This 4010 * creates a new sync task which modifies the pool to reflect the feature 4011 * as being active. 4012 */ 4013 static int 4014 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature) 4015 { 4016 int err; 4017 4018 /* EBUSY here indicates that the feature is already active */ 4019 err = dsl_sync_task(spa_name(spa), 4020 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync, 4021 &feature, 2, ZFS_SPACE_CHECK_RESERVED); 4022 4023 if (err != 0 && err != EBUSY) 4024 return (err); 4025 else 4026 return (0); 4027 } 4028 4029 /* 4030 * Removes properties from the given props list that fail permission checks 4031 * needed to clear them and to restore them in case of a receive error. For each 4032 * property, make sure we have both set and inherit permissions. 4033 * 4034 * Returns the first error encountered if any permission checks fail. If the 4035 * caller provides a non-NULL errlist, it also gives the complete list of names 4036 * of all the properties that failed a permission check along with the 4037 * corresponding error numbers. The caller is responsible for freeing the 4038 * returned errlist. 4039 * 4040 * If every property checks out successfully, zero is returned and the list 4041 * pointed at by errlist is NULL. 4042 */ 4043 static int 4044 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 4045 { 4046 zfs_cmd_t *zc; 4047 nvpair_t *pair, *next_pair; 4048 nvlist_t *errors; 4049 int err, rv = 0; 4050 4051 if (props == NULL) 4052 return (0); 4053 4054 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4055 4056 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 4057 (void) strcpy(zc->zc_name, dataset); 4058 pair = nvlist_next_nvpair(props, NULL); 4059 while (pair != NULL) { 4060 next_pair = nvlist_next_nvpair(props, pair); 4061 4062 (void) strcpy(zc->zc_value, nvpair_name(pair)); 4063 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 4064 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) { 4065 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 4066 VERIFY(nvlist_add_int32(errors, 4067 zc->zc_value, err) == 0); 4068 } 4069 pair = next_pair; 4070 } 4071 kmem_free(zc, sizeof (zfs_cmd_t)); 4072 4073 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 4074 nvlist_free(errors); 4075 errors = NULL; 4076 } else { 4077 VERIFY(nvpair_value_int32(pair, &rv) == 0); 4078 } 4079 4080 if (errlist == NULL) 4081 nvlist_free(errors); 4082 else 4083 *errlist = errors; 4084 4085 return (rv); 4086 } 4087 4088 static boolean_t 4089 propval_equals(nvpair_t *p1, nvpair_t *p2) 4090 { 4091 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 4092 /* dsl_prop_get_all_impl() format */ 4093 nvlist_t *attrs; 4094 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 4095 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4096 &p1) == 0); 4097 } 4098 4099 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 4100 nvlist_t *attrs; 4101 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 4102 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4103 &p2) == 0); 4104 } 4105 4106 if (nvpair_type(p1) != nvpair_type(p2)) 4107 return (B_FALSE); 4108 4109 if (nvpair_type(p1) == DATA_TYPE_STRING) { 4110 char *valstr1, *valstr2; 4111 4112 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 4113 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 4114 return (strcmp(valstr1, valstr2) == 0); 4115 } else { 4116 uint64_t intval1, intval2; 4117 4118 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 4119 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 4120 return (intval1 == intval2); 4121 } 4122 } 4123 4124 /* 4125 * Remove properties from props if they are not going to change (as determined 4126 * by comparison with origprops). Remove them from origprops as well, since we 4127 * do not need to clear or restore properties that won't change. 4128 */ 4129 static void 4130 props_reduce(nvlist_t *props, nvlist_t *origprops) 4131 { 4132 nvpair_t *pair, *next_pair; 4133 4134 if (origprops == NULL) 4135 return; /* all props need to be received */ 4136 4137 pair = nvlist_next_nvpair(props, NULL); 4138 while (pair != NULL) { 4139 const char *propname = nvpair_name(pair); 4140 nvpair_t *match; 4141 4142 next_pair = nvlist_next_nvpair(props, pair); 4143 4144 if ((nvlist_lookup_nvpair(origprops, propname, 4145 &match) != 0) || !propval_equals(pair, match)) 4146 goto next; /* need to set received value */ 4147 4148 /* don't clear the existing received value */ 4149 (void) nvlist_remove_nvpair(origprops, match); 4150 /* don't bother receiving the property */ 4151 (void) nvlist_remove_nvpair(props, pair); 4152 next: 4153 pair = next_pair; 4154 } 4155 } 4156 4157 /* 4158 * Extract properties that cannot be set PRIOR to the receipt of a dataset. 4159 * For example, refquota cannot be set until after the receipt of a dataset, 4160 * because in replication streams, an older/earlier snapshot may exceed the 4161 * refquota. We want to receive the older/earlier snapshot, but setting 4162 * refquota pre-receipt will set the dsl's ACTUAL quota, which will prevent 4163 * the older/earlier snapshot from being received (with EDQUOT). 4164 * 4165 * The ZFS test "zfs_receive_011_pos" demonstrates such a scenario. 4166 * 4167 * libzfs will need to be judicious handling errors encountered by props 4168 * extracted by this function. 4169 */ 4170 static nvlist_t * 4171 extract_delay_props(nvlist_t *props) 4172 { 4173 nvlist_t *delayprops; 4174 nvpair_t *nvp, *tmp; 4175 static const zfs_prop_t delayable[] = { ZFS_PROP_REFQUOTA, 0 }; 4176 int i; 4177 4178 VERIFY(nvlist_alloc(&delayprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4179 4180 for (nvp = nvlist_next_nvpair(props, NULL); nvp != NULL; 4181 nvp = nvlist_next_nvpair(props, nvp)) { 4182 /* 4183 * strcmp() is safe because zfs_prop_to_name() always returns 4184 * a bounded string. 4185 */ 4186 for (i = 0; delayable[i] != 0; i++) { 4187 if (strcmp(zfs_prop_to_name(delayable[i]), 4188 nvpair_name(nvp)) == 0) { 4189 break; 4190 } 4191 } 4192 if (delayable[i] != 0) { 4193 tmp = nvlist_prev_nvpair(props, nvp); 4194 VERIFY(nvlist_add_nvpair(delayprops, nvp) == 0); 4195 VERIFY(nvlist_remove_nvpair(props, nvp) == 0); 4196 nvp = tmp; 4197 } 4198 } 4199 4200 if (nvlist_empty(delayprops)) { 4201 nvlist_free(delayprops); 4202 delayprops = NULL; 4203 } 4204 return (delayprops); 4205 } 4206 4207 #ifdef DEBUG 4208 static boolean_t zfs_ioc_recv_inject_err; 4209 #endif 4210 4211 /* 4212 * inputs: 4213 * zc_name name of containing filesystem 4214 * zc_nvlist_src{_size} nvlist of properties to apply 4215 * zc_value name of snapshot to create 4216 * zc_string name of clone origin (if DRR_FLAG_CLONE) 4217 * zc_cookie file descriptor to recv from 4218 * zc_begin_record the BEGIN record of the stream (not byteswapped) 4219 * zc_guid force flag 4220 * zc_cleanup_fd cleanup-on-exit file descriptor 4221 * zc_action_handle handle for this guid/ds mapping (or zero on first call) 4222 * zc_resumable if data is incomplete assume sender will resume 4223 * 4224 * outputs: 4225 * zc_cookie number of bytes read 4226 * zc_nvlist_dst{_size} error for each unapplied received property 4227 * zc_obj zprop_errflags_t 4228 * zc_action_handle handle for this guid/ds mapping 4229 */ 4230 static int 4231 zfs_ioc_recv(zfs_cmd_t *zc) 4232 { 4233 file_t *fp; 4234 dmu_recv_cookie_t drc; 4235 boolean_t force = (boolean_t)zc->zc_guid; 4236 int fd; 4237 int error = 0; 4238 int props_error = 0; 4239 nvlist_t *errors; 4240 offset_t off; 4241 nvlist_t *props = NULL; /* sent properties */ 4242 nvlist_t *origprops = NULL; /* existing properties */ 4243 nvlist_t *delayprops = NULL; /* sent properties applied post-receive */ 4244 char *origin = NULL; 4245 char *tosnap; 4246 char tofs[ZFS_MAXNAMELEN]; 4247 boolean_t first_recvd_props = B_FALSE; 4248 4249 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 4250 strchr(zc->zc_value, '@') == NULL || 4251 strchr(zc->zc_value, '%')) 4252 return (SET_ERROR(EINVAL)); 4253 4254 (void) strcpy(tofs, zc->zc_value); 4255 tosnap = strchr(tofs, '@'); 4256 *tosnap++ = '\0'; 4257 4258 if (zc->zc_nvlist_src != NULL && 4259 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 4260 zc->zc_iflags, &props)) != 0) 4261 return (error); 4262 4263 fd = zc->zc_cookie; 4264 fp = getf(fd); 4265 if (fp == NULL) { 4266 nvlist_free(props); 4267 return (SET_ERROR(EBADF)); 4268 } 4269 4270 errors = fnvlist_alloc(); 4271 4272 if (zc->zc_string[0]) 4273 origin = zc->zc_string; 4274 4275 error = dmu_recv_begin(tofs, tosnap, 4276 &zc->zc_begin_record, force, zc->zc_resumable, origin, &drc); 4277 if (error != 0) 4278 goto out; 4279 4280 /* 4281 * Set properties before we receive the stream so that they are applied 4282 * to the new data. Note that we must call dmu_recv_stream() if 4283 * dmu_recv_begin() succeeds. 4284 */ 4285 if (props != NULL && !drc.drc_newfs) { 4286 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >= 4287 SPA_VERSION_RECVD_PROPS && 4288 !dsl_prop_get_hasrecvd(tofs)) 4289 first_recvd_props = B_TRUE; 4290 4291 /* 4292 * If new received properties are supplied, they are to 4293 * completely replace the existing received properties, so stash 4294 * away the existing ones. 4295 */ 4296 if (dsl_prop_get_received(tofs, &origprops) == 0) { 4297 nvlist_t *errlist = NULL; 4298 /* 4299 * Don't bother writing a property if its value won't 4300 * change (and avoid the unnecessary security checks). 4301 * 4302 * The first receive after SPA_VERSION_RECVD_PROPS is a 4303 * special case where we blow away all local properties 4304 * regardless. 4305 */ 4306 if (!first_recvd_props) 4307 props_reduce(props, origprops); 4308 if (zfs_check_clearable(tofs, origprops, &errlist) != 0) 4309 (void) nvlist_merge(errors, errlist, 0); 4310 nvlist_free(errlist); 4311 4312 if (clear_received_props(tofs, origprops, 4313 first_recvd_props ? NULL : props) != 0) 4314 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4315 } else { 4316 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4317 } 4318 } 4319 4320 if (props != NULL) { 4321 props_error = dsl_prop_set_hasrecvd(tofs); 4322 4323 if (props_error == 0) { 4324 delayprops = extract_delay_props(props); 4325 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4326 props, errors); 4327 } 4328 } 4329 4330 off = fp->f_offset; 4331 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd, 4332 &zc->zc_action_handle); 4333 4334 if (error == 0) { 4335 zfsvfs_t *zfsvfs = NULL; 4336 4337 if (getzfsvfs(tofs, &zfsvfs) == 0) { 4338 /* online recv */ 4339 int end_err; 4340 4341 error = zfs_suspend_fs(zfsvfs); 4342 /* 4343 * If the suspend fails, then the recv_end will 4344 * likely also fail, and clean up after itself. 4345 */ 4346 end_err = dmu_recv_end(&drc, zfsvfs); 4347 if (error == 0) 4348 error = zfs_resume_fs(zfsvfs, tofs); 4349 error = error ? error : end_err; 4350 VFS_RELE(zfsvfs->z_vfs); 4351 } else { 4352 error = dmu_recv_end(&drc, NULL); 4353 } 4354 4355 /* Set delayed properties now, after we're done receiving. */ 4356 if (delayprops != NULL && error == 0) { 4357 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4358 delayprops, errors); 4359 } 4360 } 4361 4362 if (delayprops != NULL) { 4363 /* 4364 * Merge delayed props back in with initial props, in case 4365 * we're DEBUG and zfs_ioc_recv_inject_err is set (which means 4366 * we have to make sure clear_received_props() includes 4367 * the delayed properties). 4368 * 4369 * Since zfs_ioc_recv_inject_err is only in DEBUG kernels, 4370 * using ASSERT() will be just like a VERIFY. 4371 */ 4372 ASSERT(nvlist_merge(props, delayprops, 0) == 0); 4373 nvlist_free(delayprops); 4374 } 4375 4376 /* 4377 * Now that all props, initial and delayed, are set, report the prop 4378 * errors to the caller. 4379 */ 4380 if (zc->zc_nvlist_dst_size != 0 && 4381 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 || 4382 put_nvlist(zc, errors) != 0)) { 4383 /* 4384 * Caller made zc->zc_nvlist_dst less than the minimum expected 4385 * size or supplied an invalid address. 4386 */ 4387 props_error = SET_ERROR(EINVAL); 4388 } 4389 4390 zc->zc_cookie = off - fp->f_offset; 4391 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4392 fp->f_offset = off; 4393 4394 #ifdef DEBUG 4395 if (zfs_ioc_recv_inject_err) { 4396 zfs_ioc_recv_inject_err = B_FALSE; 4397 error = 1; 4398 } 4399 #endif 4400 /* 4401 * On error, restore the original props. 4402 */ 4403 if (error != 0 && props != NULL && !drc.drc_newfs) { 4404 if (clear_received_props(tofs, props, NULL) != 0) { 4405 /* 4406 * We failed to clear the received properties. 4407 * Since we may have left a $recvd value on the 4408 * system, we can't clear the $hasrecvd flag. 4409 */ 4410 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4411 } else if (first_recvd_props) { 4412 dsl_prop_unset_hasrecvd(tofs); 4413 } 4414 4415 if (origprops == NULL && !drc.drc_newfs) { 4416 /* We failed to stash the original properties. */ 4417 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4418 } 4419 4420 /* 4421 * dsl_props_set() will not convert RECEIVED to LOCAL on or 4422 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 4423 * explictly if we're restoring local properties cleared in the 4424 * first new-style receive. 4425 */ 4426 if (origprops != NULL && 4427 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 4428 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 4429 origprops, NULL) != 0) { 4430 /* 4431 * We stashed the original properties but failed to 4432 * restore them. 4433 */ 4434 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4435 } 4436 } 4437 out: 4438 nvlist_free(props); 4439 nvlist_free(origprops); 4440 nvlist_free(errors); 4441 releasef(fd); 4442 4443 if (error == 0) 4444 error = props_error; 4445 4446 return (error); 4447 } 4448 4449 /* 4450 * inputs: 4451 * zc_name name of snapshot to send 4452 * zc_cookie file descriptor to send stream to 4453 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj) 4454 * zc_sendobj objsetid of snapshot to send 4455 * zc_fromobj objsetid of incremental fromsnap (may be zero) 4456 * zc_guid if set, estimate size of stream only. zc_cookie is ignored. 4457 * output size in zc_objset_type. 4458 * zc_flags lzc_send_flags 4459 * 4460 * outputs: 4461 * zc_objset_type estimated size, if zc_guid is set 4462 */ 4463 static int 4464 zfs_ioc_send(zfs_cmd_t *zc) 4465 { 4466 int error; 4467 offset_t off; 4468 boolean_t estimate = (zc->zc_guid != 0); 4469 boolean_t embedok = (zc->zc_flags & 0x1); 4470 boolean_t large_block_ok = (zc->zc_flags & 0x2); 4471 4472 if (zc->zc_obj != 0) { 4473 dsl_pool_t *dp; 4474 dsl_dataset_t *tosnap; 4475 4476 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4477 if (error != 0) 4478 return (error); 4479 4480 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4481 if (error != 0) { 4482 dsl_pool_rele(dp, FTAG); 4483 return (error); 4484 } 4485 4486 if (dsl_dir_is_clone(tosnap->ds_dir)) 4487 zc->zc_fromobj = 4488 dsl_dir_phys(tosnap->ds_dir)->dd_origin_obj; 4489 dsl_dataset_rele(tosnap, FTAG); 4490 dsl_pool_rele(dp, FTAG); 4491 } 4492 4493 if (estimate) { 4494 dsl_pool_t *dp; 4495 dsl_dataset_t *tosnap; 4496 dsl_dataset_t *fromsnap = NULL; 4497 4498 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4499 if (error != 0) 4500 return (error); 4501 4502 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4503 if (error != 0) { 4504 dsl_pool_rele(dp, FTAG); 4505 return (error); 4506 } 4507 4508 if (zc->zc_fromobj != 0) { 4509 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, 4510 FTAG, &fromsnap); 4511 if (error != 0) { 4512 dsl_dataset_rele(tosnap, FTAG); 4513 dsl_pool_rele(dp, FTAG); 4514 return (error); 4515 } 4516 } 4517 4518 error = dmu_send_estimate(tosnap, fromsnap, 4519 &zc->zc_objset_type); 4520 4521 if (fromsnap != NULL) 4522 dsl_dataset_rele(fromsnap, FTAG); 4523 dsl_dataset_rele(tosnap, FTAG); 4524 dsl_pool_rele(dp, FTAG); 4525 } else { 4526 file_t *fp = getf(zc->zc_cookie); 4527 if (fp == NULL) 4528 return (SET_ERROR(EBADF)); 4529 4530 off = fp->f_offset; 4531 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj, 4532 zc->zc_fromobj, embedok, large_block_ok, 4533 zc->zc_cookie, fp->f_vnode, &off); 4534 4535 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4536 fp->f_offset = off; 4537 releasef(zc->zc_cookie); 4538 } 4539 return (error); 4540 } 4541 4542 /* 4543 * inputs: 4544 * zc_name name of snapshot on which to report progress 4545 * zc_cookie file descriptor of send stream 4546 * 4547 * outputs: 4548 * zc_cookie number of bytes written in send stream thus far 4549 */ 4550 static int 4551 zfs_ioc_send_progress(zfs_cmd_t *zc) 4552 { 4553 dsl_pool_t *dp; 4554 dsl_dataset_t *ds; 4555 dmu_sendarg_t *dsp = NULL; 4556 int error; 4557 4558 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4559 if (error != 0) 4560 return (error); 4561 4562 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds); 4563 if (error != 0) { 4564 dsl_pool_rele(dp, FTAG); 4565 return (error); 4566 } 4567 4568 mutex_enter(&ds->ds_sendstream_lock); 4569 4570 /* 4571 * Iterate over all the send streams currently active on this dataset. 4572 * If there's one which matches the specified file descriptor _and_ the 4573 * stream was started by the current process, return the progress of 4574 * that stream. 4575 */ 4576 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL; 4577 dsp = list_next(&ds->ds_sendstreams, dsp)) { 4578 if (dsp->dsa_outfd == zc->zc_cookie && 4579 dsp->dsa_proc == curproc) 4580 break; 4581 } 4582 4583 if (dsp != NULL) 4584 zc->zc_cookie = *(dsp->dsa_off); 4585 else 4586 error = SET_ERROR(ENOENT); 4587 4588 mutex_exit(&ds->ds_sendstream_lock); 4589 dsl_dataset_rele(ds, FTAG); 4590 dsl_pool_rele(dp, FTAG); 4591 return (error); 4592 } 4593 4594 static int 4595 zfs_ioc_inject_fault(zfs_cmd_t *zc) 4596 { 4597 int id, error; 4598 4599 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 4600 &zc->zc_inject_record); 4601 4602 if (error == 0) 4603 zc->zc_guid = (uint64_t)id; 4604 4605 return (error); 4606 } 4607 4608 static int 4609 zfs_ioc_clear_fault(zfs_cmd_t *zc) 4610 { 4611 return (zio_clear_fault((int)zc->zc_guid)); 4612 } 4613 4614 static int 4615 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 4616 { 4617 int id = (int)zc->zc_guid; 4618 int error; 4619 4620 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 4621 &zc->zc_inject_record); 4622 4623 zc->zc_guid = id; 4624 4625 return (error); 4626 } 4627 4628 static int 4629 zfs_ioc_error_log(zfs_cmd_t *zc) 4630 { 4631 spa_t *spa; 4632 int error; 4633 size_t count = (size_t)zc->zc_nvlist_dst_size; 4634 4635 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 4636 return (error); 4637 4638 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 4639 &count); 4640 if (error == 0) 4641 zc->zc_nvlist_dst_size = count; 4642 else 4643 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 4644 4645 spa_close(spa, FTAG); 4646 4647 return (error); 4648 } 4649 4650 static int 4651 zfs_ioc_clear(zfs_cmd_t *zc) 4652 { 4653 spa_t *spa; 4654 vdev_t *vd; 4655 int error; 4656 4657 /* 4658 * On zpool clear we also fix up missing slogs 4659 */ 4660 mutex_enter(&spa_namespace_lock); 4661 spa = spa_lookup(zc->zc_name); 4662 if (spa == NULL) { 4663 mutex_exit(&spa_namespace_lock); 4664 return (SET_ERROR(EIO)); 4665 } 4666 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 4667 /* we need to let spa_open/spa_load clear the chains */ 4668 spa_set_log_state(spa, SPA_LOG_CLEAR); 4669 } 4670 spa->spa_last_open_failed = 0; 4671 mutex_exit(&spa_namespace_lock); 4672 4673 if (zc->zc_cookie & ZPOOL_NO_REWIND) { 4674 error = spa_open(zc->zc_name, &spa, FTAG); 4675 } else { 4676 nvlist_t *policy; 4677 nvlist_t *config = NULL; 4678 4679 if (zc->zc_nvlist_src == NULL) 4680 return (SET_ERROR(EINVAL)); 4681 4682 if ((error = get_nvlist(zc->zc_nvlist_src, 4683 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 4684 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 4685 policy, &config); 4686 if (config != NULL) { 4687 int err; 4688 4689 if ((err = put_nvlist(zc, config)) != 0) 4690 error = err; 4691 nvlist_free(config); 4692 } 4693 nvlist_free(policy); 4694 } 4695 } 4696 4697 if (error != 0) 4698 return (error); 4699 4700 spa_vdev_state_enter(spa, SCL_NONE); 4701 4702 if (zc->zc_guid == 0) { 4703 vd = NULL; 4704 } else { 4705 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 4706 if (vd == NULL) { 4707 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 4708 spa_close(spa, FTAG); 4709 return (SET_ERROR(ENODEV)); 4710 } 4711 } 4712 4713 vdev_clear(spa, vd); 4714 4715 (void) spa_vdev_state_exit(spa, NULL, 0); 4716 4717 /* 4718 * Resume any suspended I/Os. 4719 */ 4720 if (zio_resume(spa) != 0) 4721 error = SET_ERROR(EIO); 4722 4723 spa_close(spa, FTAG); 4724 4725 return (error); 4726 } 4727 4728 static int 4729 zfs_ioc_pool_reopen(zfs_cmd_t *zc) 4730 { 4731 spa_t *spa; 4732 int error; 4733 4734 error = spa_open(zc->zc_name, &spa, FTAG); 4735 if (error != 0) 4736 return (error); 4737 4738 spa_vdev_state_enter(spa, SCL_NONE); 4739 4740 /* 4741 * If a resilver is already in progress then set the 4742 * spa_scrub_reopen flag to B_TRUE so that we don't restart 4743 * the scan as a side effect of the reopen. Otherwise, let 4744 * vdev_open() decided if a resilver is required. 4745 */ 4746 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool); 4747 vdev_reopen(spa->spa_root_vdev); 4748 spa->spa_scrub_reopen = B_FALSE; 4749 4750 (void) spa_vdev_state_exit(spa, NULL, 0); 4751 spa_close(spa, FTAG); 4752 return (0); 4753 } 4754 /* 4755 * inputs: 4756 * zc_name name of filesystem 4757 * zc_value name of origin snapshot 4758 * 4759 * outputs: 4760 * zc_string name of conflicting snapshot, if there is one 4761 */ 4762 static int 4763 zfs_ioc_promote(zfs_cmd_t *zc) 4764 { 4765 char *cp; 4766 4767 /* 4768 * We don't need to unmount *all* the origin fs's snapshots, but 4769 * it's easier. 4770 */ 4771 cp = strchr(zc->zc_value, '@'); 4772 if (cp) 4773 *cp = '\0'; 4774 (void) dmu_objset_find(zc->zc_value, 4775 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS); 4776 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 4777 } 4778 4779 /* 4780 * Retrieve a single {user|group}{used|quota}@... property. 4781 * 4782 * inputs: 4783 * zc_name name of filesystem 4784 * zc_objset_type zfs_userquota_prop_t 4785 * zc_value domain name (eg. "S-1-234-567-89") 4786 * zc_guid RID/UID/GID 4787 * 4788 * outputs: 4789 * zc_cookie property value 4790 */ 4791 static int 4792 zfs_ioc_userspace_one(zfs_cmd_t *zc) 4793 { 4794 zfsvfs_t *zfsvfs; 4795 int error; 4796 4797 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 4798 return (SET_ERROR(EINVAL)); 4799 4800 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4801 if (error != 0) 4802 return (error); 4803 4804 error = zfs_userspace_one(zfsvfs, 4805 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 4806 zfsvfs_rele(zfsvfs, FTAG); 4807 4808 return (error); 4809 } 4810 4811 /* 4812 * inputs: 4813 * zc_name name of filesystem 4814 * zc_cookie zap cursor 4815 * zc_objset_type zfs_userquota_prop_t 4816 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 4817 * 4818 * outputs: 4819 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 4820 * zc_cookie zap cursor 4821 */ 4822 static int 4823 zfs_ioc_userspace_many(zfs_cmd_t *zc) 4824 { 4825 zfsvfs_t *zfsvfs; 4826 int bufsize = zc->zc_nvlist_dst_size; 4827 4828 if (bufsize <= 0) 4829 return (SET_ERROR(ENOMEM)); 4830 4831 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4832 if (error != 0) 4833 return (error); 4834 4835 void *buf = kmem_alloc(bufsize, KM_SLEEP); 4836 4837 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 4838 buf, &zc->zc_nvlist_dst_size); 4839 4840 if (error == 0) { 4841 error = xcopyout(buf, 4842 (void *)(uintptr_t)zc->zc_nvlist_dst, 4843 zc->zc_nvlist_dst_size); 4844 } 4845 kmem_free(buf, bufsize); 4846 zfsvfs_rele(zfsvfs, FTAG); 4847 4848 return (error); 4849 } 4850 4851 /* 4852 * inputs: 4853 * zc_name name of filesystem 4854 * 4855 * outputs: 4856 * none 4857 */ 4858 static int 4859 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 4860 { 4861 objset_t *os; 4862 int error = 0; 4863 zfsvfs_t *zfsvfs; 4864 4865 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 4866 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 4867 /* 4868 * If userused is not enabled, it may be because the 4869 * objset needs to be closed & reopened (to grow the 4870 * objset_phys_t). Suspend/resume the fs will do that. 4871 */ 4872 error = zfs_suspend_fs(zfsvfs); 4873 if (error == 0) { 4874 dmu_objset_refresh_ownership(zfsvfs->z_os, 4875 zfsvfs); 4876 error = zfs_resume_fs(zfsvfs, zc->zc_name); 4877 } 4878 } 4879 if (error == 0) 4880 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 4881 VFS_RELE(zfsvfs->z_vfs); 4882 } else { 4883 /* XXX kind of reading contents without owning */ 4884 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4885 if (error != 0) 4886 return (error); 4887 4888 error = dmu_objset_userspace_upgrade(os); 4889 dmu_objset_rele(os, FTAG); 4890 } 4891 4892 return (error); 4893 } 4894 4895 /* 4896 * We don't want to have a hard dependency 4897 * against some special symbols in sharefs 4898 * nfs, and smbsrv. Determine them if needed when 4899 * the first file system is shared. 4900 * Neither sharefs, nfs or smbsrv are unloadable modules. 4901 */ 4902 int (*znfsexport_fs)(void *arg); 4903 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 4904 int (*zsmbexport_fs)(void *arg, boolean_t add_share); 4905 4906 int zfs_nfsshare_inited; 4907 int zfs_smbshare_inited; 4908 4909 ddi_modhandle_t nfs_mod; 4910 ddi_modhandle_t sharefs_mod; 4911 ddi_modhandle_t smbsrv_mod; 4912 kmutex_t zfs_share_lock; 4913 4914 static int 4915 zfs_init_sharefs() 4916 { 4917 int error; 4918 4919 ASSERT(MUTEX_HELD(&zfs_share_lock)); 4920 /* Both NFS and SMB shares also require sharetab support. */ 4921 if (sharefs_mod == NULL && ((sharefs_mod = 4922 ddi_modopen("fs/sharefs", 4923 KRTLD_MODE_FIRST, &error)) == NULL)) { 4924 return (SET_ERROR(ENOSYS)); 4925 } 4926 if (zshare_fs == NULL && ((zshare_fs = 4927 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 4928 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 4929 return (SET_ERROR(ENOSYS)); 4930 } 4931 return (0); 4932 } 4933 4934 static int 4935 zfs_ioc_share(zfs_cmd_t *zc) 4936 { 4937 int error; 4938 int opcode; 4939 4940 switch (zc->zc_share.z_sharetype) { 4941 case ZFS_SHARE_NFS: 4942 case ZFS_UNSHARE_NFS: 4943 if (zfs_nfsshare_inited == 0) { 4944 mutex_enter(&zfs_share_lock); 4945 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 4946 KRTLD_MODE_FIRST, &error)) == NULL)) { 4947 mutex_exit(&zfs_share_lock); 4948 return (SET_ERROR(ENOSYS)); 4949 } 4950 if (znfsexport_fs == NULL && 4951 ((znfsexport_fs = (int (*)(void *)) 4952 ddi_modsym(nfs_mod, 4953 "nfs_export", &error)) == NULL)) { 4954 mutex_exit(&zfs_share_lock); 4955 return (SET_ERROR(ENOSYS)); 4956 } 4957 error = zfs_init_sharefs(); 4958 if (error != 0) { 4959 mutex_exit(&zfs_share_lock); 4960 return (SET_ERROR(ENOSYS)); 4961 } 4962 zfs_nfsshare_inited = 1; 4963 mutex_exit(&zfs_share_lock); 4964 } 4965 break; 4966 case ZFS_SHARE_SMB: 4967 case ZFS_UNSHARE_SMB: 4968 if (zfs_smbshare_inited == 0) { 4969 mutex_enter(&zfs_share_lock); 4970 if (smbsrv_mod == NULL && ((smbsrv_mod = 4971 ddi_modopen("drv/smbsrv", 4972 KRTLD_MODE_FIRST, &error)) == NULL)) { 4973 mutex_exit(&zfs_share_lock); 4974 return (SET_ERROR(ENOSYS)); 4975 } 4976 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 4977 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 4978 "smb_server_share", &error)) == NULL)) { 4979 mutex_exit(&zfs_share_lock); 4980 return (SET_ERROR(ENOSYS)); 4981 } 4982 error = zfs_init_sharefs(); 4983 if (error != 0) { 4984 mutex_exit(&zfs_share_lock); 4985 return (SET_ERROR(ENOSYS)); 4986 } 4987 zfs_smbshare_inited = 1; 4988 mutex_exit(&zfs_share_lock); 4989 } 4990 break; 4991 default: 4992 return (SET_ERROR(EINVAL)); 4993 } 4994 4995 switch (zc->zc_share.z_sharetype) { 4996 case ZFS_SHARE_NFS: 4997 case ZFS_UNSHARE_NFS: 4998 if (error = 4999 znfsexport_fs((void *) 5000 (uintptr_t)zc->zc_share.z_exportdata)) 5001 return (error); 5002 break; 5003 case ZFS_SHARE_SMB: 5004 case ZFS_UNSHARE_SMB: 5005 if (error = zsmbexport_fs((void *) 5006 (uintptr_t)zc->zc_share.z_exportdata, 5007 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 5008 B_TRUE: B_FALSE)) { 5009 return (error); 5010 } 5011 break; 5012 } 5013 5014 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 5015 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 5016 SHAREFS_ADD : SHAREFS_REMOVE; 5017 5018 /* 5019 * Add or remove share from sharetab 5020 */ 5021 error = zshare_fs(opcode, 5022 (void *)(uintptr_t)zc->zc_share.z_sharedata, 5023 zc->zc_share.z_sharemax); 5024 5025 return (error); 5026 5027 } 5028 5029 ace_t full_access[] = { 5030 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 5031 }; 5032 5033 /* 5034 * inputs: 5035 * zc_name name of containing filesystem 5036 * zc_obj object # beyond which we want next in-use object # 5037 * 5038 * outputs: 5039 * zc_obj next in-use object # 5040 */ 5041 static int 5042 zfs_ioc_next_obj(zfs_cmd_t *zc) 5043 { 5044 objset_t *os = NULL; 5045 int error; 5046 5047 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 5048 if (error != 0) 5049 return (error); 5050 5051 error = dmu_object_next(os, &zc->zc_obj, B_FALSE, 5052 dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg); 5053 5054 dmu_objset_rele(os, FTAG); 5055 return (error); 5056 } 5057 5058 /* 5059 * inputs: 5060 * zc_name name of filesystem 5061 * zc_value prefix name for snapshot 5062 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 5063 * 5064 * outputs: 5065 * zc_value short name of new snapshot 5066 */ 5067 static int 5068 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc) 5069 { 5070 char *snap_name; 5071 char *hold_name; 5072 int error; 5073 minor_t minor; 5074 5075 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor); 5076 if (error != 0) 5077 return (error); 5078 5079 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value, 5080 (u_longlong_t)ddi_get_lbolt64()); 5081 hold_name = kmem_asprintf("%%%s", zc->zc_value); 5082 5083 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor, 5084 hold_name); 5085 if (error == 0) 5086 (void) strcpy(zc->zc_value, snap_name); 5087 strfree(snap_name); 5088 strfree(hold_name); 5089 zfs_onexit_fd_rele(zc->zc_cleanup_fd); 5090 return (error); 5091 } 5092 5093 /* 5094 * inputs: 5095 * zc_name name of "to" snapshot 5096 * zc_value name of "from" snapshot 5097 * zc_cookie file descriptor to write diff data on 5098 * 5099 * outputs: 5100 * dmu_diff_record_t's to the file descriptor 5101 */ 5102 static int 5103 zfs_ioc_diff(zfs_cmd_t *zc) 5104 { 5105 file_t *fp; 5106 offset_t off; 5107 int error; 5108 5109 fp = getf(zc->zc_cookie); 5110 if (fp == NULL) 5111 return (SET_ERROR(EBADF)); 5112 5113 off = fp->f_offset; 5114 5115 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off); 5116 5117 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5118 fp->f_offset = off; 5119 releasef(zc->zc_cookie); 5120 5121 return (error); 5122 } 5123 5124 /* 5125 * Remove all ACL files in shares dir 5126 */ 5127 static int 5128 zfs_smb_acl_purge(znode_t *dzp) 5129 { 5130 zap_cursor_t zc; 5131 zap_attribute_t zap; 5132 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 5133 int error; 5134 5135 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 5136 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 5137 zap_cursor_advance(&zc)) { 5138 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 5139 NULL, 0)) != 0) 5140 break; 5141 } 5142 zap_cursor_fini(&zc); 5143 return (error); 5144 } 5145 5146 static int 5147 zfs_ioc_smb_acl(zfs_cmd_t *zc) 5148 { 5149 vnode_t *vp; 5150 znode_t *dzp; 5151 vnode_t *resourcevp = NULL; 5152 znode_t *sharedir; 5153 zfsvfs_t *zfsvfs; 5154 nvlist_t *nvlist; 5155 char *src, *target; 5156 vattr_t vattr; 5157 vsecattr_t vsec; 5158 int error = 0; 5159 5160 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 5161 NO_FOLLOW, NULL, &vp)) != 0) 5162 return (error); 5163 5164 /* Now make sure mntpnt and dataset are ZFS */ 5165 5166 if (vp->v_vfsp->vfs_fstype != zfsfstype || 5167 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 5168 zc->zc_name) != 0)) { 5169 VN_RELE(vp); 5170 return (SET_ERROR(EINVAL)); 5171 } 5172 5173 dzp = VTOZ(vp); 5174 zfsvfs = dzp->z_zfsvfs; 5175 ZFS_ENTER(zfsvfs); 5176 5177 /* 5178 * Create share dir if its missing. 5179 */ 5180 mutex_enter(&zfsvfs->z_lock); 5181 if (zfsvfs->z_shares_dir == 0) { 5182 dmu_tx_t *tx; 5183 5184 tx = dmu_tx_create(zfsvfs->z_os); 5185 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 5186 ZFS_SHARES_DIR); 5187 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 5188 error = dmu_tx_assign(tx, TXG_WAIT); 5189 if (error != 0) { 5190 dmu_tx_abort(tx); 5191 } else { 5192 error = zfs_create_share_dir(zfsvfs, tx); 5193 dmu_tx_commit(tx); 5194 } 5195 if (error != 0) { 5196 mutex_exit(&zfsvfs->z_lock); 5197 VN_RELE(vp); 5198 ZFS_EXIT(zfsvfs); 5199 return (error); 5200 } 5201 } 5202 mutex_exit(&zfsvfs->z_lock); 5203 5204 ASSERT(zfsvfs->z_shares_dir); 5205 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 5206 VN_RELE(vp); 5207 ZFS_EXIT(zfsvfs); 5208 return (error); 5209 } 5210 5211 switch (zc->zc_cookie) { 5212 case ZFS_SMB_ACL_ADD: 5213 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 5214 vattr.va_type = VREG; 5215 vattr.va_mode = S_IFREG|0777; 5216 vattr.va_uid = 0; 5217 vattr.va_gid = 0; 5218 5219 vsec.vsa_mask = VSA_ACE; 5220 vsec.vsa_aclentp = &full_access; 5221 vsec.vsa_aclentsz = sizeof (full_access); 5222 vsec.vsa_aclcnt = 1; 5223 5224 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 5225 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 5226 if (resourcevp) 5227 VN_RELE(resourcevp); 5228 break; 5229 5230 case ZFS_SMB_ACL_REMOVE: 5231 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 5232 NULL, 0); 5233 break; 5234 5235 case ZFS_SMB_ACL_RENAME: 5236 if ((error = get_nvlist(zc->zc_nvlist_src, 5237 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 5238 VN_RELE(vp); 5239 VN_RELE(ZTOV(sharedir)); 5240 ZFS_EXIT(zfsvfs); 5241 return (error); 5242 } 5243 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 5244 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 5245 &target)) { 5246 VN_RELE(vp); 5247 VN_RELE(ZTOV(sharedir)); 5248 ZFS_EXIT(zfsvfs); 5249 nvlist_free(nvlist); 5250 return (error); 5251 } 5252 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 5253 kcred, NULL, 0); 5254 nvlist_free(nvlist); 5255 break; 5256 5257 case ZFS_SMB_ACL_PURGE: 5258 error = zfs_smb_acl_purge(sharedir); 5259 break; 5260 5261 default: 5262 error = SET_ERROR(EINVAL); 5263 break; 5264 } 5265 5266 VN_RELE(vp); 5267 VN_RELE(ZTOV(sharedir)); 5268 5269 ZFS_EXIT(zfsvfs); 5270 5271 return (error); 5272 } 5273 5274 /* 5275 * innvl: { 5276 * "holds" -> { snapname -> holdname (string), ... } 5277 * (optional) "cleanup_fd" -> fd (int32) 5278 * } 5279 * 5280 * outnvl: { 5281 * snapname -> error value (int32) 5282 * ... 5283 * } 5284 */ 5285 /* ARGSUSED */ 5286 static int 5287 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist) 5288 { 5289 nvpair_t *pair; 5290 nvlist_t *holds; 5291 int cleanup_fd = -1; 5292 int error; 5293 minor_t minor = 0; 5294 5295 error = nvlist_lookup_nvlist(args, "holds", &holds); 5296 if (error != 0) 5297 return (SET_ERROR(EINVAL)); 5298 5299 /* make sure the user didn't pass us any invalid (empty) tags */ 5300 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; 5301 pair = nvlist_next_nvpair(holds, pair)) { 5302 char *htag; 5303 5304 error = nvpair_value_string(pair, &htag); 5305 if (error != 0) 5306 return (SET_ERROR(error)); 5307 5308 if (strlen(htag) == 0) 5309 return (SET_ERROR(EINVAL)); 5310 } 5311 5312 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) { 5313 error = zfs_onexit_fd_hold(cleanup_fd, &minor); 5314 if (error != 0) 5315 return (error); 5316 } 5317 5318 error = dsl_dataset_user_hold(holds, minor, errlist); 5319 if (minor != 0) 5320 zfs_onexit_fd_rele(cleanup_fd); 5321 return (error); 5322 } 5323 5324 /* 5325 * innvl is not used. 5326 * 5327 * outnvl: { 5328 * holdname -> time added (uint64 seconds since epoch) 5329 * ... 5330 * } 5331 */ 5332 /* ARGSUSED */ 5333 static int 5334 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl) 5335 { 5336 return (dsl_dataset_get_holds(snapname, outnvl)); 5337 } 5338 5339 /* 5340 * innvl: { 5341 * snapname -> { holdname, ... } 5342 * ... 5343 * } 5344 * 5345 * outnvl: { 5346 * snapname -> error value (int32) 5347 * ... 5348 * } 5349 */ 5350 /* ARGSUSED */ 5351 static int 5352 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist) 5353 { 5354 return (dsl_dataset_user_release(holds, errlist)); 5355 } 5356 5357 /* 5358 * inputs: 5359 * zc_name name of new filesystem or snapshot 5360 * zc_value full name of old snapshot 5361 * 5362 * outputs: 5363 * zc_cookie space in bytes 5364 * zc_objset_type compressed space in bytes 5365 * zc_perm_action uncompressed space in bytes 5366 */ 5367 static int 5368 zfs_ioc_space_written(zfs_cmd_t *zc) 5369 { 5370 int error; 5371 dsl_pool_t *dp; 5372 dsl_dataset_t *new, *old; 5373 5374 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 5375 if (error != 0) 5376 return (error); 5377 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new); 5378 if (error != 0) { 5379 dsl_pool_rele(dp, FTAG); 5380 return (error); 5381 } 5382 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old); 5383 if (error != 0) { 5384 dsl_dataset_rele(new, FTAG); 5385 dsl_pool_rele(dp, FTAG); 5386 return (error); 5387 } 5388 5389 error = dsl_dataset_space_written(old, new, &zc->zc_cookie, 5390 &zc->zc_objset_type, &zc->zc_perm_action); 5391 dsl_dataset_rele(old, FTAG); 5392 dsl_dataset_rele(new, FTAG); 5393 dsl_pool_rele(dp, FTAG); 5394 return (error); 5395 } 5396 5397 /* 5398 * innvl: { 5399 * "firstsnap" -> snapshot name 5400 * } 5401 * 5402 * outnvl: { 5403 * "used" -> space in bytes 5404 * "compressed" -> compressed space in bytes 5405 * "uncompressed" -> uncompressed space in bytes 5406 * } 5407 */ 5408 static int 5409 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl) 5410 { 5411 int error; 5412 dsl_pool_t *dp; 5413 dsl_dataset_t *new, *old; 5414 char *firstsnap; 5415 uint64_t used, comp, uncomp; 5416 5417 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0) 5418 return (SET_ERROR(EINVAL)); 5419 5420 error = dsl_pool_hold(lastsnap, FTAG, &dp); 5421 if (error != 0) 5422 return (error); 5423 5424 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new); 5425 if (error == 0 && !new->ds_is_snapshot) { 5426 dsl_dataset_rele(new, FTAG); 5427 error = SET_ERROR(EINVAL); 5428 } 5429 if (error != 0) { 5430 dsl_pool_rele(dp, FTAG); 5431 return (error); 5432 } 5433 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old); 5434 if (error == 0 && !old->ds_is_snapshot) { 5435 dsl_dataset_rele(old, FTAG); 5436 error = SET_ERROR(EINVAL); 5437 } 5438 if (error != 0) { 5439 dsl_dataset_rele(new, FTAG); 5440 dsl_pool_rele(dp, FTAG); 5441 return (error); 5442 } 5443 5444 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp); 5445 dsl_dataset_rele(old, FTAG); 5446 dsl_dataset_rele(new, FTAG); 5447 dsl_pool_rele(dp, FTAG); 5448 fnvlist_add_uint64(outnvl, "used", used); 5449 fnvlist_add_uint64(outnvl, "compressed", comp); 5450 fnvlist_add_uint64(outnvl, "uncompressed", uncomp); 5451 return (error); 5452 } 5453 5454 /* 5455 * innvl: { 5456 * "fd" -> file descriptor to write stream to (int32) 5457 * (optional) "fromsnap" -> full snap name to send an incremental from 5458 * (optional) "largeblockok" -> (value ignored) 5459 * indicates that blocks > 128KB are permitted 5460 * (optional) "embedok" -> (value ignored) 5461 * presence indicates DRR_WRITE_EMBEDDED records are permitted 5462 * (optional) "resume_object" and "resume_offset" -> (uint64) 5463 * if present, resume send stream from specified object and offset. 5464 * } 5465 * 5466 * outnvl is unused 5467 */ 5468 /* ARGSUSED */ 5469 static int 5470 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5471 { 5472 int error; 5473 offset_t off; 5474 char *fromname = NULL; 5475 int fd; 5476 boolean_t largeblockok; 5477 boolean_t embedok; 5478 uint64_t resumeobj = 0; 5479 uint64_t resumeoff = 0; 5480 5481 error = nvlist_lookup_int32(innvl, "fd", &fd); 5482 if (error != 0) 5483 return (SET_ERROR(EINVAL)); 5484 5485 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname); 5486 5487 largeblockok = nvlist_exists(innvl, "largeblockok"); 5488 embedok = nvlist_exists(innvl, "embedok"); 5489 5490 (void) nvlist_lookup_uint64(innvl, "resume_object", &resumeobj); 5491 (void) nvlist_lookup_uint64(innvl, "resume_offset", &resumeoff); 5492 5493 file_t *fp = getf(fd); 5494 if (fp == NULL) 5495 return (SET_ERROR(EBADF)); 5496 5497 off = fp->f_offset; 5498 error = dmu_send(snapname, fromname, embedok, largeblockok, fd, 5499 resumeobj, resumeoff, fp->f_vnode, &off); 5500 5501 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5502 fp->f_offset = off; 5503 releasef(fd); 5504 return (error); 5505 } 5506 5507 /* 5508 * Determine approximately how large a zfs send stream will be -- the number 5509 * of bytes that will be written to the fd supplied to zfs_ioc_send_new(). 5510 * 5511 * innvl: { 5512 * (optional) "from" -> full snap or bookmark name to send an incremental 5513 * from 5514 * } 5515 * 5516 * outnvl: { 5517 * "space" -> bytes of space (uint64) 5518 * } 5519 */ 5520 static int 5521 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5522 { 5523 dsl_pool_t *dp; 5524 dsl_dataset_t *tosnap; 5525 int error; 5526 char *fromname; 5527 uint64_t space; 5528 5529 error = dsl_pool_hold(snapname, FTAG, &dp); 5530 if (error != 0) 5531 return (error); 5532 5533 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap); 5534 if (error != 0) { 5535 dsl_pool_rele(dp, FTAG); 5536 return (error); 5537 } 5538 5539 error = nvlist_lookup_string(innvl, "from", &fromname); 5540 if (error == 0) { 5541 if (strchr(fromname, '@') != NULL) { 5542 /* 5543 * If from is a snapshot, hold it and use the more 5544 * efficient dmu_send_estimate to estimate send space 5545 * size using deadlists. 5546 */ 5547 dsl_dataset_t *fromsnap; 5548 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap); 5549 if (error != 0) 5550 goto out; 5551 error = dmu_send_estimate(tosnap, fromsnap, &space); 5552 dsl_dataset_rele(fromsnap, FTAG); 5553 } else if (strchr(fromname, '#') != NULL) { 5554 /* 5555 * If from is a bookmark, fetch the creation TXG of the 5556 * snapshot it was created from and use that to find 5557 * blocks that were born after it. 5558 */ 5559 zfs_bookmark_phys_t frombm; 5560 5561 error = dsl_bookmark_lookup(dp, fromname, tosnap, 5562 &frombm); 5563 if (error != 0) 5564 goto out; 5565 error = dmu_send_estimate_from_txg(tosnap, 5566 frombm.zbm_creation_txg, &space); 5567 } else { 5568 /* 5569 * from is not properly formatted as a snapshot or 5570 * bookmark 5571 */ 5572 error = SET_ERROR(EINVAL); 5573 goto out; 5574 } 5575 } else { 5576 // If estimating the size of a full send, use dmu_send_estimate 5577 error = dmu_send_estimate(tosnap, NULL, &space); 5578 } 5579 5580 fnvlist_add_uint64(outnvl, "space", space); 5581 5582 out: 5583 dsl_dataset_rele(tosnap, FTAG); 5584 dsl_pool_rele(dp, FTAG); 5585 return (error); 5586 } 5587 5588 static int 5589 zfs_ioc_set_zev_callbacks(const char *unused, nvlist_t *innvl, 5590 nvlist_t *outnvl) 5591 { 5592 int error; 5593 uint64_t cb_addr; 5594 /* 5595 * Our secpolicy for this op makes sure it's called in 5596 * kernel context, and that no other callbacks have 5597 * been registered, yet. 5598 */ 5599 error = nvlist_lookup_uint64(innvl, "callbacks", &cb_addr); 5600 if (error != 0) { 5601 cmn_err(CE_WARN, "set_zev_callbacks nvlist lookup failed (%d)", 5602 error); 5603 return (error); 5604 } 5605 /* cb_addr is always a kernel memory address */ 5606 rw_enter(&rz_zev_rwlock, RW_WRITER); 5607 if (rz_zev_callbacks != rz_zev_default_callbacks) { 5608 rw_exit(&rz_zev_rwlock); 5609 return (EBUSY); 5610 } 5611 rz_zev_callbacks = (void *)(uintptr_t)cb_addr; 5612 rw_exit(&rz_zev_rwlock); 5613 return (0); 5614 } 5615 5616 static int 5617 zfs_ioc_unset_zev_callbacks(const char *unused, nvlist_t *innvl, 5618 nvlist_t *outnvl) 5619 { 5620 /* 5621 * Our secpolicy for this op makes sure it's called in 5622 * kernel context. 5623 */ 5624 rw_enter(&rz_zev_rwlock, RW_WRITER); 5625 rz_zev_callbacks = rz_zev_default_callbacks; 5626 rw_exit(&rz_zev_rwlock); 5627 /* after mutex release, no thread is using the old table anymore. */ 5628 return (0); 5629 } 5630 5631 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST]; 5632 5633 static void 5634 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5635 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5636 boolean_t log_history, zfs_ioc_poolcheck_t pool_check) 5637 { 5638 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5639 5640 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5641 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5642 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5643 ASSERT3P(vec->zvec_func, ==, NULL); 5644 5645 vec->zvec_legacy_func = func; 5646 vec->zvec_secpolicy = secpolicy; 5647 vec->zvec_namecheck = namecheck; 5648 vec->zvec_allow_log = log_history; 5649 vec->zvec_pool_check = pool_check; 5650 } 5651 5652 /* 5653 * See the block comment at the beginning of this file for details on 5654 * each argument to this function. 5655 */ 5656 static void 5657 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func, 5658 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5659 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist, 5660 boolean_t allow_log) 5661 { 5662 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5663 5664 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5665 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5666 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5667 ASSERT3P(vec->zvec_func, ==, NULL); 5668 5669 /* if we are logging, the name must be valid */ 5670 ASSERT(!allow_log || namecheck != NO_NAME); 5671 5672 vec->zvec_name = name; 5673 vec->zvec_func = func; 5674 vec->zvec_secpolicy = secpolicy; 5675 vec->zvec_namecheck = namecheck; 5676 vec->zvec_pool_check = pool_check; 5677 vec->zvec_smush_outnvlist = smush_outnvlist; 5678 vec->zvec_allow_log = allow_log; 5679 } 5680 5681 static void 5682 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5683 zfs_secpolicy_func_t *secpolicy, boolean_t log_history, 5684 zfs_ioc_poolcheck_t pool_check) 5685 { 5686 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5687 POOL_NAME, log_history, pool_check); 5688 } 5689 5690 static void 5691 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5692 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check) 5693 { 5694 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5695 DATASET_NAME, B_FALSE, pool_check); 5696 } 5697 5698 static void 5699 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5700 { 5701 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config, 5702 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5703 } 5704 5705 static void 5706 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5707 zfs_secpolicy_func_t *secpolicy) 5708 { 5709 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5710 NO_NAME, B_FALSE, POOL_CHECK_NONE); 5711 } 5712 5713 static void 5714 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc, 5715 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy) 5716 { 5717 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5718 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED); 5719 } 5720 5721 static void 5722 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5723 { 5724 zfs_ioctl_register_dataset_read_secpolicy(ioc, func, 5725 zfs_secpolicy_read); 5726 } 5727 5728 static void 5729 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5730 zfs_secpolicy_func_t *secpolicy) 5731 { 5732 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5733 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5734 } 5735 5736 static void 5737 zfs_ioctl_init(void) 5738 { 5739 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT, 5740 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME, 5741 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5742 5743 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY, 5744 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME, 5745 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE); 5746 5747 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS, 5748 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME, 5749 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5750 5751 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW, 5752 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME, 5753 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5754 5755 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE, 5756 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME, 5757 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5758 5759 zfs_ioctl_register("create", ZFS_IOC_CREATE, 5760 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME, 5761 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5762 5763 zfs_ioctl_register("clone", ZFS_IOC_CLONE, 5764 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME, 5765 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5766 5767 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS, 5768 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME, 5769 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5770 5771 zfs_ioctl_register("hold", ZFS_IOC_HOLD, 5772 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME, 5773 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5774 zfs_ioctl_register("release", ZFS_IOC_RELEASE, 5775 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME, 5776 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5777 5778 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS, 5779 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, 5780 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5781 5782 zfs_ioctl_register("set_zev_callbacks", ZFS_IOC_SET_ZEV_CALLBACKS, 5783 zfs_ioc_set_zev_callbacks, zfs_secpolicy_set_zev_callbacks, NO_NAME, 5784 POOL_CHECK_NONE, B_TRUE, B_FALSE); 5785 5786 zfs_ioctl_register("unset_zev_callbacks", ZFS_IOC_UNSET_ZEV_CALLBACKS, 5787 zfs_ioc_unset_zev_callbacks, zfs_secpolicy_unset_zev_callbacks, 5788 NO_NAME, POOL_CHECK_NONE, B_TRUE, B_FALSE); 5789 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK, 5790 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, 5791 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE); 5792 5793 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK, 5794 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME, 5795 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5796 5797 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS, 5798 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME, 5799 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5800 5801 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS, 5802 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks, 5803 POOL_NAME, 5804 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5805 5806 /* IOCTLS that use the legacy function signature */ 5807 5808 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze, 5809 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY); 5810 5811 zfs_ioctl_register_legacy(ZFS_IOC_ARC_INFO, zfs_ioc_arc_info, 5812 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_NONE); 5813 5814 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create, 5815 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5816 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN, 5817 zfs_ioc_pool_scan); 5818 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE, 5819 zfs_ioc_pool_upgrade); 5820 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD, 5821 zfs_ioc_vdev_add); 5822 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE, 5823 zfs_ioc_vdev_remove); 5824 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE, 5825 zfs_ioc_vdev_set_state); 5826 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH, 5827 zfs_ioc_vdev_attach); 5828 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH, 5829 zfs_ioc_vdev_detach); 5830 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH, 5831 zfs_ioc_vdev_setpath); 5832 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU, 5833 zfs_ioc_vdev_setfru); 5834 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS, 5835 zfs_ioc_pool_set_props); 5836 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT, 5837 zfs_ioc_vdev_split); 5838 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID, 5839 zfs_ioc_pool_reguid); 5840 5841 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS, 5842 zfs_ioc_pool_configs, zfs_secpolicy_none); 5843 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT, 5844 zfs_ioc_pool_tryimport, zfs_secpolicy_config); 5845 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT, 5846 zfs_ioc_inject_fault, zfs_secpolicy_inject); 5847 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT, 5848 zfs_ioc_clear_fault, zfs_secpolicy_inject); 5849 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT, 5850 zfs_ioc_inject_list_next, zfs_secpolicy_inject); 5851 5852 /* 5853 * pool destroy, and export don't log the history as part of 5854 * zfsdev_ioctl, but rather zfs_ioc_pool_export 5855 * does the logging of those commands. 5856 */ 5857 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy, 5858 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5859 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export, 5860 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5861 5862 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats, 5863 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5864 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props, 5865 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5866 5867 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log, 5868 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED); 5869 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME, 5870 zfs_ioc_dsobj_to_dsname, 5871 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED); 5872 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY, 5873 zfs_ioc_pool_get_history, 5874 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED); 5875 5876 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import, 5877 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5878 5879 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear, 5880 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5881 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen, 5882 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED); 5883 5884 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN, 5885 zfs_ioc_space_written); 5886 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS, 5887 zfs_ioc_objset_recvd_props); 5888 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ, 5889 zfs_ioc_next_obj); 5890 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL, 5891 zfs_ioc_get_fsacl); 5892 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS, 5893 zfs_ioc_objset_stats); 5894 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS, 5895 zfs_ioc_objset_zplprops); 5896 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT, 5897 zfs_ioc_dataset_list_next); 5898 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT, 5899 zfs_ioc_snapshot_list_next); 5900 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS, 5901 zfs_ioc_send_progress); 5902 5903 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF, 5904 zfs_ioc_diff, zfs_secpolicy_diff); 5905 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS, 5906 zfs_ioc_obj_to_stats, zfs_secpolicy_diff); 5907 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH, 5908 zfs_ioc_obj_to_path, zfs_secpolicy_diff); 5909 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE, 5910 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one); 5911 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY, 5912 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many); 5913 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND, 5914 zfs_ioc_send, zfs_secpolicy_send); 5915 5916 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop, 5917 zfs_secpolicy_none); 5918 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy, 5919 zfs_secpolicy_destroy); 5920 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename, 5921 zfs_secpolicy_rename); 5922 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv, 5923 zfs_secpolicy_recv); 5924 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote, 5925 zfs_secpolicy_promote); 5926 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP, 5927 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop); 5928 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl, 5929 zfs_secpolicy_set_fsacl); 5930 5931 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share, 5932 zfs_secpolicy_share, POOL_CHECK_NONE); 5933 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl, 5934 zfs_secpolicy_smb_acl, POOL_CHECK_NONE); 5935 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE, 5936 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 5937 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5938 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT, 5939 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, 5940 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5941 } 5942 5943 int 5944 pool_status_check(const char *name, zfs_ioc_namecheck_t type, 5945 zfs_ioc_poolcheck_t check) 5946 { 5947 spa_t *spa; 5948 int error; 5949 5950 ASSERT(type == POOL_NAME || type == DATASET_NAME); 5951 5952 if (check & POOL_CHECK_NONE) 5953 return (0); 5954 5955 error = spa_open(name, &spa, FTAG); 5956 if (error == 0) { 5957 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa)) 5958 error = SET_ERROR(EAGAIN); 5959 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa)) 5960 error = SET_ERROR(EROFS); 5961 spa_close(spa, FTAG); 5962 } 5963 return (error); 5964 } 5965 5966 /* 5967 * Find a free minor number. 5968 */ 5969 minor_t 5970 zfsdev_minor_alloc(void) 5971 { 5972 static minor_t last_minor; 5973 minor_t m; 5974 5975 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5976 5977 for (m = last_minor + 1; m != last_minor; m++) { 5978 if (m > ZFSDEV_MAX_MINOR) 5979 m = 1; 5980 if (ddi_get_soft_state(zfsdev_state, m) == NULL) { 5981 last_minor = m; 5982 return (m); 5983 } 5984 } 5985 5986 return (0); 5987 } 5988 5989 static int 5990 zfs_ctldev_init(dev_t *devp) 5991 { 5992 minor_t minor; 5993 zfs_soft_state_t *zs; 5994 5995 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5996 ASSERT(getminor(*devp) == 0); 5997 5998 minor = zfsdev_minor_alloc(); 5999 if (minor == 0) 6000 return (SET_ERROR(ENXIO)); 6001 6002 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) 6003 return (SET_ERROR(EAGAIN)); 6004 6005 *devp = makedevice(getemajor(*devp), minor); 6006 6007 zs = ddi_get_soft_state(zfsdev_state, minor); 6008 zs->zss_type = ZSST_CTLDEV; 6009 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data); 6010 6011 return (0); 6012 } 6013 6014 static void 6015 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor) 6016 { 6017 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 6018 6019 zfs_onexit_destroy(zo); 6020 ddi_soft_state_free(zfsdev_state, minor); 6021 } 6022 6023 void * 6024 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which) 6025 { 6026 zfs_soft_state_t *zp; 6027 6028 zp = ddi_get_soft_state(zfsdev_state, minor); 6029 if (zp == NULL || zp->zss_type != which) 6030 return (NULL); 6031 6032 return (zp->zss_data); 6033 } 6034 6035 static int 6036 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr) 6037 { 6038 int error = 0; 6039 6040 if (getminor(*devp) != 0) 6041 return (zvol_open(devp, flag, otyp, cr)); 6042 6043 /* This is the control device. Allocate a new minor if requested. */ 6044 if (flag & FEXCL) { 6045 mutex_enter(&zfsdev_state_lock); 6046 error = zfs_ctldev_init(devp); 6047 mutex_exit(&zfsdev_state_lock); 6048 } 6049 6050 return (error); 6051 } 6052 6053 static int 6054 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr) 6055 { 6056 zfs_onexit_t *zo; 6057 minor_t minor = getminor(dev); 6058 6059 if (minor == 0) 6060 return (0); 6061 6062 mutex_enter(&zfsdev_state_lock); 6063 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV); 6064 if (zo == NULL) { 6065 mutex_exit(&zfsdev_state_lock); 6066 return (zvol_close(dev, flag, otyp, cr)); 6067 } 6068 zfs_ctldev_destroy(zo, minor); 6069 mutex_exit(&zfsdev_state_lock); 6070 6071 return (0); 6072 } 6073 6074 static int 6075 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 6076 { 6077 zfs_cmd_t *zc; 6078 uint_t vecnum; 6079 int error, rc, len; 6080 minor_t minor = getminor(dev); 6081 const zfs_ioc_vec_t *vec; 6082 char *saved_poolname = NULL; 6083 nvlist_t *innvl = NULL; 6084 6085 if (minor != 0 && 6086 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL) 6087 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 6088 6089 vecnum = cmd - ZFS_IOC_FIRST; 6090 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 6091 6092 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 6093 return (SET_ERROR(EINVAL)); 6094 vec = &zfs_ioc_vec[vecnum]; 6095 6096 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 6097 6098 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 6099 if (error != 0) { 6100 error = SET_ERROR(EFAULT); 6101 goto out; 6102 } 6103 6104 zc->zc_iflags = flag & FKIOCTL; 6105 if (zc->zc_nvlist_src_size != 0) { 6106 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 6107 zc->zc_iflags, &innvl); 6108 if (error != 0) 6109 goto out; 6110 } 6111 6112 /* 6113 * Ensure that all pool/dataset names are valid before we pass down to 6114 * the lower layers. 6115 */ 6116 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 6117 switch (vec->zvec_namecheck) { 6118 case POOL_NAME: 6119 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 6120 error = SET_ERROR(EINVAL); 6121 else 6122 error = pool_status_check(zc->zc_name, 6123 vec->zvec_namecheck, vec->zvec_pool_check); 6124 break; 6125 6126 case DATASET_NAME: 6127 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 6128 error = SET_ERROR(EINVAL); 6129 else 6130 error = pool_status_check(zc->zc_name, 6131 vec->zvec_namecheck, vec->zvec_pool_check); 6132 break; 6133 6134 case NO_NAME: 6135 break; 6136 } 6137 6138 6139 if (error == 0 && !(flag & FKIOCTL)) 6140 error = vec->zvec_secpolicy(zc, innvl, cr); 6141 6142 if (error != 0) 6143 goto out; 6144 6145 /* legacy ioctls can modify zc_name */ 6146 len = strcspn(zc->zc_name, "/@#") + 1; 6147 saved_poolname = kmem_alloc(len, KM_SLEEP); 6148 (void) strlcpy(saved_poolname, zc->zc_name, len); 6149 6150 if (vec->zvec_func != NULL) { 6151 nvlist_t *outnvl; 6152 int puterror = 0; 6153 spa_t *spa; 6154 nvlist_t *lognv = NULL; 6155 6156 ASSERT(vec->zvec_legacy_func == NULL); 6157 6158 /* 6159 * Add the innvl to the lognv before calling the func, 6160 * in case the func changes the innvl. 6161 */ 6162 if (vec->zvec_allow_log) { 6163 lognv = fnvlist_alloc(); 6164 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL, 6165 vec->zvec_name); 6166 if (!nvlist_empty(innvl)) { 6167 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL, 6168 innvl); 6169 } 6170 } 6171 6172 outnvl = fnvlist_alloc(); 6173 error = vec->zvec_func(zc->zc_name, innvl, outnvl); 6174 6175 if (error == 0 && vec->zvec_allow_log && 6176 spa_open(zc->zc_name, &spa, FTAG) == 0) { 6177 if (!nvlist_empty(outnvl)) { 6178 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL, 6179 outnvl); 6180 } 6181 (void) spa_history_log_nvl(spa, lognv); 6182 spa_close(spa, FTAG); 6183 } 6184 fnvlist_free(lognv); 6185 6186 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) { 6187 int smusherror = 0; 6188 if (vec->zvec_smush_outnvlist) { 6189 smusherror = nvlist_smush(outnvl, 6190 zc->zc_nvlist_dst_size); 6191 } 6192 if (smusherror == 0) 6193 puterror = put_nvlist(zc, outnvl); 6194 } 6195 6196 if (puterror != 0) 6197 error = puterror; 6198 6199 nvlist_free(outnvl); 6200 } else { 6201 error = vec->zvec_legacy_func(zc); 6202 } 6203 6204 out: 6205 nvlist_free(innvl); 6206 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 6207 if (error == 0 && rc != 0) 6208 error = SET_ERROR(EFAULT); 6209 if (error == 0 && vec->zvec_allow_log) { 6210 char *s = tsd_get(zfs_allow_log_key); 6211 if (s != NULL) 6212 strfree(s); 6213 (void) tsd_set(zfs_allow_log_key, saved_poolname); 6214 } else { 6215 if (saved_poolname != NULL) 6216 strfree(saved_poolname); 6217 } 6218 6219 kmem_free(zc, sizeof (zfs_cmd_t)); 6220 return (error); 6221 } 6222 6223 static int 6224 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 6225 { 6226 if (cmd != DDI_ATTACH) 6227 return (DDI_FAILURE); 6228 6229 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 6230 DDI_PSEUDO, 0) == DDI_FAILURE) 6231 return (DDI_FAILURE); 6232 6233 zfs_dip = dip; 6234 6235 ddi_report_dev(dip); 6236 6237 return (DDI_SUCCESS); 6238 } 6239 6240 static int 6241 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 6242 { 6243 if (spa_busy() || zfs_busy() || zvol_busy()) 6244 return (DDI_FAILURE); 6245 6246 if (cmd != DDI_DETACH) 6247 return (DDI_FAILURE); 6248 6249 zfs_dip = NULL; 6250 6251 ddi_prop_remove_all(dip); 6252 ddi_remove_minor_node(dip, NULL); 6253 6254 return (DDI_SUCCESS); 6255 } 6256 6257 /*ARGSUSED*/ 6258 static int 6259 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 6260 { 6261 switch (infocmd) { 6262 case DDI_INFO_DEVT2DEVINFO: 6263 *result = zfs_dip; 6264 return (DDI_SUCCESS); 6265 6266 case DDI_INFO_DEVT2INSTANCE: 6267 *result = (void *)0; 6268 return (DDI_SUCCESS); 6269 } 6270 6271 return (DDI_FAILURE); 6272 } 6273 6274 /* 6275 * OK, so this is a little weird. 6276 * 6277 * /dev/zfs is the control node, i.e. minor 0. 6278 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 6279 * 6280 * /dev/zfs has basically nothing to do except serve up ioctls, 6281 * so most of the standard driver entry points are in zvol.c. 6282 */ 6283 static struct cb_ops zfs_cb_ops = { 6284 zfsdev_open, /* open */ 6285 zfsdev_close, /* close */ 6286 zvol_strategy, /* strategy */ 6287 nodev, /* print */ 6288 zvol_dump, /* dump */ 6289 zvol_read, /* read */ 6290 zvol_write, /* write */ 6291 zfsdev_ioctl, /* ioctl */ 6292 nodev, /* devmap */ 6293 nodev, /* mmap */ 6294 nodev, /* segmap */ 6295 nochpoll, /* poll */ 6296 ddi_prop_op, /* prop_op */ 6297 NULL, /* streamtab */ 6298 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 6299 CB_REV, /* version */ 6300 nodev, /* async read */ 6301 nodev, /* async write */ 6302 }; 6303 6304 static struct dev_ops zfs_dev_ops = { 6305 DEVO_REV, /* version */ 6306 0, /* refcnt */ 6307 zfs_info, /* info */ 6308 nulldev, /* identify */ 6309 nulldev, /* probe */ 6310 zfs_attach, /* attach */ 6311 zfs_detach, /* detach */ 6312 nodev, /* reset */ 6313 &zfs_cb_ops, /* driver operations */ 6314 NULL, /* no bus operations */ 6315 NULL, /* power */ 6316 ddi_quiesce_not_needed, /* quiesce */ 6317 }; 6318 6319 static struct modldrv zfs_modldrv = { 6320 &mod_driverops, 6321 "ZFS storage pool", 6322 &zfs_dev_ops 6323 }; 6324 6325 static struct modlinkage modlinkage = { 6326 MODREV_1, 6327 (void *)&zfs_modlfs, 6328 (void *)&zfs_modldrv, 6329 NULL 6330 }; 6331 6332 static void 6333 zfs_allow_log_destroy(void *arg) 6334 { 6335 char *poolname = arg; 6336 strfree(poolname); 6337 } 6338 6339 int 6340 _init(void) 6341 { 6342 int error; 6343 6344 spa_init(FREAD | FWRITE); 6345 zfs_init(); 6346 zvol_init(); 6347 zfs_ioctl_init(); 6348 rz_zev_init(); 6349 6350 if ((error = mod_install(&modlinkage)) != 0) { 6351 zvol_fini(); 6352 zfs_fini(); 6353 spa_fini(); 6354 return (error); 6355 } 6356 6357 tsd_create(&zfs_fsyncer_key, NULL); 6358 tsd_create(&rrw_tsd_key, rrw_tsd_destroy); 6359 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy); 6360 6361 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 6362 ASSERT(error == 0); 6363 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 6364 6365 return (0); 6366 } 6367 6368 int 6369 _fini(void) 6370 { 6371 int error; 6372 6373 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 6374 return (SET_ERROR(EBUSY)); 6375 6376 if ((error = mod_remove(&modlinkage)) != 0) 6377 return (error); 6378 6379 rz_zev_fini(); 6380 zvol_fini(); 6381 zfs_fini(); 6382 spa_fini(); 6383 if (zfs_nfsshare_inited) 6384 (void) ddi_modclose(nfs_mod); 6385 if (zfs_smbshare_inited) 6386 (void) ddi_modclose(smbsrv_mod); 6387 if (zfs_nfsshare_inited || zfs_smbshare_inited) 6388 (void) ddi_modclose(sharefs_mod); 6389 6390 tsd_destroy(&zfs_fsyncer_key); 6391 ldi_ident_release(zfs_li); 6392 zfs_li = NULL; 6393 mutex_destroy(&zfs_share_lock); 6394 6395 return (error); 6396 } 6397 6398 int 6399 _info(struct modinfo *modinfop) 6400 { 6401 return (mod_info(&modlinkage, modinfop)); 6402 } 6403