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 strchr(origin_name, '#') != NULL) 3342 return (SET_ERROR(EINVAL)); 3343 error = dmu_objset_clone(fsname, origin_name); 3344 if (error != 0) 3345 return (error); 3346 3347 /* 3348 * It would be nice to do this atomically. 3349 */ 3350 if (error == 0) { 3351 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3352 nvprops, outnvl); 3353 if (error != 0) 3354 (void) dsl_destroy_head(fsname); 3355 } 3356 return (error); 3357 } 3358 3359 /* 3360 * innvl: { 3361 * "snaps" -> { snapshot1, snapshot2 } 3362 * (optional) "props" -> { prop -> value (string) } 3363 * } 3364 * 3365 * outnvl: snapshot -> error code (int32) 3366 */ 3367 static int 3368 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3369 { 3370 nvlist_t *snaps; 3371 nvlist_t *props = NULL; 3372 int error, poollen; 3373 nvpair_t *pair; 3374 3375 (void) nvlist_lookup_nvlist(innvl, "props", &props); 3376 if ((error = zfs_check_userprops(poolname, props)) != 0) 3377 return (error); 3378 3379 if (!nvlist_empty(props) && 3380 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS)) 3381 return (SET_ERROR(ENOTSUP)); 3382 3383 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3384 return (SET_ERROR(EINVAL)); 3385 poollen = strlen(poolname); 3386 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3387 pair = nvlist_next_nvpair(snaps, pair)) { 3388 const char *name = nvpair_name(pair); 3389 const char *cp = strchr(name, '@'); 3390 3391 /* 3392 * The snap name must contain an @, and the part after it must 3393 * contain only valid characters. 3394 */ 3395 if (cp == NULL || 3396 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3397 return (SET_ERROR(EINVAL)); 3398 3399 /* 3400 * The snap must be in the specified pool. 3401 */ 3402 if (strncmp(name, poolname, poollen) != 0 || 3403 (name[poollen] != '/' && name[poollen] != '@')) 3404 return (SET_ERROR(EXDEV)); 3405 3406 /* This must be the only snap of this fs. */ 3407 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair); 3408 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) { 3409 if (strncmp(name, nvpair_name(pair2), cp - name + 1) 3410 == 0) { 3411 return (SET_ERROR(EXDEV)); 3412 } 3413 } 3414 } 3415 3416 error = dsl_dataset_snapshot(snaps, props, outnvl); 3417 return (error); 3418 } 3419 3420 /* 3421 * innvl: "message" -> string 3422 */ 3423 /* ARGSUSED */ 3424 static int 3425 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl) 3426 { 3427 char *message; 3428 spa_t *spa; 3429 int error; 3430 char *poolname; 3431 3432 /* 3433 * The poolname in the ioctl is not set, we get it from the TSD, 3434 * which was set at the end of the last successful ioctl that allows 3435 * logging. The secpolicy func already checked that it is set. 3436 * Only one log ioctl is allowed after each successful ioctl, so 3437 * we clear the TSD here. 3438 */ 3439 poolname = tsd_get(zfs_allow_log_key); 3440 (void) tsd_set(zfs_allow_log_key, NULL); 3441 error = spa_open(poolname, &spa, FTAG); 3442 strfree(poolname); 3443 if (error != 0) 3444 return (error); 3445 3446 if (nvlist_lookup_string(innvl, "message", &message) != 0) { 3447 spa_close(spa, FTAG); 3448 return (SET_ERROR(EINVAL)); 3449 } 3450 3451 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 3452 spa_close(spa, FTAG); 3453 return (SET_ERROR(ENOTSUP)); 3454 } 3455 3456 error = spa_history_log(spa, message); 3457 spa_close(spa, FTAG); 3458 return (error); 3459 } 3460 3461 /* 3462 * The dp_config_rwlock must not be held when calling this, because the 3463 * unmount may need to write out data. 3464 * 3465 * This function is best-effort. Callers must deal gracefully if it 3466 * remains mounted (or is remounted after this call). 3467 * 3468 * Returns 0 if the argument is not a snapshot, or it is not currently a 3469 * filesystem, or we were able to unmount it. Returns error code otherwise. 3470 */ 3471 int 3472 zfs_unmount_snap(const char *snapname) 3473 { 3474 vfs_t *vfsp; 3475 zfsvfs_t *zfsvfs; 3476 int err; 3477 3478 if (strchr(snapname, '@') == NULL) 3479 return (0); 3480 3481 vfsp = zfs_get_vfs(snapname); 3482 if (vfsp == NULL) 3483 return (0); 3484 3485 zfsvfs = vfsp->vfs_data; 3486 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os))); 3487 3488 err = vn_vfswlock(vfsp->vfs_vnodecovered); 3489 VFS_RELE(vfsp); 3490 if (err != 0) 3491 return (SET_ERROR(err)); 3492 3493 /* 3494 * Always force the unmount for snapshots. 3495 */ 3496 (void) dounmount(vfsp, MS_FORCE, kcred); 3497 return (0); 3498 } 3499 3500 /* ARGSUSED */ 3501 static int 3502 zfs_unmount_snap_cb(const char *snapname, void *arg) 3503 { 3504 return (zfs_unmount_snap(snapname)); 3505 } 3506 3507 /* 3508 * When a clone is destroyed, its origin may also need to be destroyed, 3509 * in which case it must be unmounted. This routine will do that unmount 3510 * if necessary. 3511 */ 3512 void 3513 zfs_destroy_unmount_origin(const char *fsname) 3514 { 3515 int error; 3516 objset_t *os; 3517 dsl_dataset_t *ds; 3518 3519 error = dmu_objset_hold(fsname, FTAG, &os); 3520 if (error != 0) 3521 return; 3522 ds = dmu_objset_ds(os); 3523 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) { 3524 char originname[MAXNAMELEN]; 3525 dsl_dataset_name(ds->ds_prev, originname); 3526 dmu_objset_rele(os, FTAG); 3527 (void) zfs_unmount_snap(originname); 3528 } else { 3529 dmu_objset_rele(os, FTAG); 3530 } 3531 } 3532 3533 /* 3534 * innvl: { 3535 * "snaps" -> { snapshot1, snapshot2 } 3536 * (optional boolean) "defer" 3537 * } 3538 * 3539 * outnvl: snapshot -> error code (int32) 3540 * 3541 */ 3542 /* ARGSUSED */ 3543 static int 3544 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3545 { 3546 nvlist_t *snaps; 3547 nvpair_t *pair; 3548 boolean_t defer; 3549 3550 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3551 return (SET_ERROR(EINVAL)); 3552 defer = nvlist_exists(innvl, "defer"); 3553 3554 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3555 pair = nvlist_next_nvpair(snaps, pair)) { 3556 (void) zfs_unmount_snap(nvpair_name(pair)); 3557 } 3558 3559 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl)); 3560 } 3561 3562 /* 3563 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>. 3564 * All bookmarks must be in the same pool. 3565 * 3566 * innvl: { 3567 * bookmark1 -> snapshot1, bookmark2 -> snapshot2 3568 * } 3569 * 3570 * outnvl: bookmark -> error code (int32) 3571 * 3572 */ 3573 /* ARGSUSED */ 3574 static int 3575 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3576 { 3577 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3578 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3579 char *snap_name; 3580 3581 /* 3582 * Verify the snapshot argument. 3583 */ 3584 if (nvpair_value_string(pair, &snap_name) != 0) 3585 return (SET_ERROR(EINVAL)); 3586 3587 3588 /* Verify that the keys (bookmarks) are unique */ 3589 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair); 3590 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) { 3591 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0) 3592 return (SET_ERROR(EINVAL)); 3593 } 3594 } 3595 3596 return (dsl_bookmark_create(innvl, outnvl)); 3597 } 3598 3599 /* 3600 * innvl: { 3601 * property 1, property 2, ... 3602 * } 3603 * 3604 * outnvl: { 3605 * bookmark name 1 -> { property 1, property 2, ... }, 3606 * bookmark name 2 -> { property 1, property 2, ... } 3607 * } 3608 * 3609 */ 3610 static int 3611 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3612 { 3613 return (dsl_get_bookmarks(fsname, innvl, outnvl)); 3614 } 3615 3616 /* 3617 * innvl: { 3618 * bookmark name 1, bookmark name 2 3619 * } 3620 * 3621 * outnvl: bookmark -> error code (int32) 3622 * 3623 */ 3624 static int 3625 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl, 3626 nvlist_t *outnvl) 3627 { 3628 int error, poollen; 3629 3630 poollen = strlen(poolname); 3631 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3632 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3633 const char *name = nvpair_name(pair); 3634 const char *cp = strchr(name, '#'); 3635 3636 /* 3637 * The bookmark name must contain an #, and the part after it 3638 * must contain only valid characters. 3639 */ 3640 if (cp == NULL || 3641 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3642 return (SET_ERROR(EINVAL)); 3643 3644 /* 3645 * The bookmark must be in the specified pool. 3646 */ 3647 if (strncmp(name, poolname, poollen) != 0 || 3648 (name[poollen] != '/' && name[poollen] != '#')) 3649 return (SET_ERROR(EXDEV)); 3650 } 3651 3652 error = dsl_bookmark_destroy(innvl, outnvl); 3653 return (error); 3654 } 3655 3656 /* 3657 * inputs: 3658 * zc_name name of dataset to destroy 3659 * zc_objset_type type of objset 3660 * zc_defer_destroy mark for deferred destroy 3661 * 3662 * outputs: none 3663 */ 3664 static int 3665 zfs_ioc_destroy(zfs_cmd_t *zc) 3666 { 3667 int err; 3668 3669 if (zc->zc_objset_type == DMU_OST_ZFS) { 3670 err = zfs_unmount_snap(zc->zc_name); 3671 if (err != 0) 3672 return (err); 3673 } 3674 3675 if (strchr(zc->zc_name, '@')) 3676 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy); 3677 else 3678 err = dsl_destroy_head(zc->zc_name); 3679 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 3680 (void) zvol_remove_minor(zc->zc_name); 3681 return (err); 3682 } 3683 3684 /* 3685 * fsname is name of dataset to rollback (to most recent snapshot) 3686 * 3687 * innvl is not used. 3688 * 3689 * outnvl: "target" -> name of most recent snapshot 3690 * } 3691 */ 3692 /* ARGSUSED */ 3693 static int 3694 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl) 3695 { 3696 zfsvfs_t *zfsvfs; 3697 int error; 3698 3699 if (getzfsvfs(fsname, &zfsvfs) == 0) { 3700 error = zfs_suspend_fs(zfsvfs); 3701 if (error == 0) { 3702 int resume_err; 3703 3704 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl); 3705 resume_err = zfs_resume_fs(zfsvfs, fsname); 3706 error = error ? error : resume_err; 3707 } 3708 VFS_RELE(zfsvfs->z_vfs); 3709 } else { 3710 error = dsl_dataset_rollback(fsname, NULL, outnvl); 3711 } 3712 return (error); 3713 } 3714 3715 static int 3716 recursive_unmount(const char *fsname, void *arg) 3717 { 3718 const char *snapname = arg; 3719 char fullname[MAXNAMELEN]; 3720 3721 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname); 3722 return (zfs_unmount_snap(fullname)); 3723 } 3724 3725 /* 3726 * inputs: 3727 * zc_name old name of dataset 3728 * zc_value new name of dataset 3729 * zc_cookie recursive flag (only valid for snapshots) 3730 * 3731 * outputs: none 3732 */ 3733 static int 3734 zfs_ioc_rename(zfs_cmd_t *zc) 3735 { 3736 boolean_t recursive = zc->zc_cookie & 1; 3737 char *at; 3738 3739 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3740 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3741 strchr(zc->zc_value, '#') != NULL || 3742 strchr(zc->zc_value, '%') != NULL) 3743 return (SET_ERROR(EINVAL)); 3744 3745 at = strchr(zc->zc_name, '@'); 3746 if (at != NULL) { 3747 /* snaps must be in same fs */ 3748 int error; 3749 3750 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1)) 3751 return (SET_ERROR(EXDEV)); 3752 *at = '\0'; 3753 if (zc->zc_objset_type == DMU_OST_ZFS) { 3754 error = dmu_objset_find(zc->zc_name, 3755 recursive_unmount, at + 1, 3756 recursive ? DS_FIND_CHILDREN : 0); 3757 if (error != 0) { 3758 *at = '@'; 3759 return (error); 3760 } 3761 } 3762 error = dsl_dataset_rename_snapshot(zc->zc_name, 3763 at + 1, strchr(zc->zc_value, '@') + 1, recursive); 3764 *at = '@'; 3765 3766 return (error); 3767 } else { 3768 if (zc->zc_objset_type == DMU_OST_ZVOL) 3769 (void) zvol_remove_minor(zc->zc_name); 3770 return (dsl_dir_rename(zc->zc_name, zc->zc_value)); 3771 } 3772 } 3773 3774 static int 3775 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3776 { 3777 const char *propname = nvpair_name(pair); 3778 boolean_t issnap = (strchr(dsname, '@') != NULL); 3779 zfs_prop_t prop = zfs_name_to_prop(propname); 3780 uint64_t intval; 3781 int err; 3782 3783 if (prop == ZPROP_INVAL) { 3784 if (zfs_prop_user(propname)) { 3785 if (err = zfs_secpolicy_write_perms(dsname, 3786 ZFS_DELEG_PERM_USERPROP, cr)) 3787 return (err); 3788 return (0); 3789 } 3790 3791 if (!issnap && zfs_prop_userquota(propname)) { 3792 const char *perm = NULL; 3793 const char *uq_prefix = 3794 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3795 const char *gq_prefix = 3796 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3797 3798 if (strncmp(propname, uq_prefix, 3799 strlen(uq_prefix)) == 0) { 3800 perm = ZFS_DELEG_PERM_USERQUOTA; 3801 } else if (strncmp(propname, gq_prefix, 3802 strlen(gq_prefix)) == 0) { 3803 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3804 } else { 3805 /* USERUSED and GROUPUSED are read-only */ 3806 return (SET_ERROR(EINVAL)); 3807 } 3808 3809 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3810 return (err); 3811 return (0); 3812 } 3813 3814 return (SET_ERROR(EINVAL)); 3815 } 3816 3817 if (issnap) 3818 return (SET_ERROR(EINVAL)); 3819 3820 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3821 /* 3822 * dsl_prop_get_all_impl() returns properties in this 3823 * format. 3824 */ 3825 nvlist_t *attrs; 3826 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3827 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3828 &pair) == 0); 3829 } 3830 3831 /* 3832 * Check that this value is valid for this pool version 3833 */ 3834 switch (prop) { 3835 case ZFS_PROP_COMPRESSION: 3836 /* 3837 * If the user specified gzip compression, make sure 3838 * the SPA supports it. We ignore any errors here since 3839 * we'll catch them later. 3840 */ 3841 if (nvpair_value_uint64(pair, &intval) == 0) { 3842 if (intval >= ZIO_COMPRESS_GZIP_1 && 3843 intval <= ZIO_COMPRESS_GZIP_9 && 3844 zfs_earlier_version(dsname, 3845 SPA_VERSION_GZIP_COMPRESSION)) { 3846 return (SET_ERROR(ENOTSUP)); 3847 } 3848 3849 if (intval == ZIO_COMPRESS_ZLE && 3850 zfs_earlier_version(dsname, 3851 SPA_VERSION_ZLE_COMPRESSION)) 3852 return (SET_ERROR(ENOTSUP)); 3853 3854 if (intval == ZIO_COMPRESS_LZ4) { 3855 spa_t *spa; 3856 3857 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3858 return (err); 3859 3860 if (!spa_feature_is_enabled(spa, 3861 SPA_FEATURE_LZ4_COMPRESS)) { 3862 spa_close(spa, FTAG); 3863 return (SET_ERROR(ENOTSUP)); 3864 } 3865 spa_close(spa, FTAG); 3866 } 3867 3868 /* 3869 * If this is a bootable dataset then 3870 * verify that the compression algorithm 3871 * is supported for booting. We must return 3872 * something other than ENOTSUP since it 3873 * implies a downrev pool version. 3874 */ 3875 if (zfs_is_bootfs(dsname) && 3876 !BOOTFS_COMPRESS_VALID(intval)) { 3877 return (SET_ERROR(ERANGE)); 3878 } 3879 } 3880 break; 3881 3882 case ZFS_PROP_COPIES: 3883 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3884 return (SET_ERROR(ENOTSUP)); 3885 break; 3886 3887 case ZFS_PROP_RECORDSIZE: 3888 /* Record sizes above 128k need the feature to be enabled */ 3889 if (nvpair_value_uint64(pair, &intval) == 0 && 3890 intval > SPA_OLD_MAXBLOCKSIZE) { 3891 spa_t *spa; 3892 3893 /* 3894 * If this is a bootable dataset then 3895 * the we don't allow large (>128K) blocks, 3896 * because GRUB doesn't support them. 3897 */ 3898 if (zfs_is_bootfs(dsname) && 3899 intval > SPA_OLD_MAXBLOCKSIZE) { 3900 return (SET_ERROR(ERANGE)); 3901 } 3902 3903 /* 3904 * We don't allow setting the property above 1MB, 3905 * unless the tunable has been changed. 3906 */ 3907 if (intval > zfs_max_recordsize || 3908 intval > SPA_MAXBLOCKSIZE) 3909 return (SET_ERROR(ERANGE)); 3910 3911 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3912 return (err); 3913 3914 if (!spa_feature_is_enabled(spa, 3915 SPA_FEATURE_LARGE_BLOCKS)) { 3916 spa_close(spa, FTAG); 3917 return (SET_ERROR(ENOTSUP)); 3918 } 3919 spa_close(spa, FTAG); 3920 } 3921 break; 3922 3923 case ZFS_PROP_SHARESMB: 3924 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3925 return (SET_ERROR(ENOTSUP)); 3926 break; 3927 3928 case ZFS_PROP_ACLINHERIT: 3929 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3930 nvpair_value_uint64(pair, &intval) == 0) { 3931 if (intval == ZFS_ACL_PASSTHROUGH_X && 3932 zfs_earlier_version(dsname, 3933 SPA_VERSION_PASSTHROUGH_X)) 3934 return (SET_ERROR(ENOTSUP)); 3935 } 3936 break; 3937 3938 case ZFS_PROP_CHECKSUM: 3939 case ZFS_PROP_DEDUP: 3940 { 3941 spa_feature_t feature; 3942 spa_t *spa; 3943 3944 /* dedup feature version checks */ 3945 if (prop == ZFS_PROP_DEDUP && 3946 zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3947 return (SET_ERROR(ENOTSUP)); 3948 3949 if (nvpair_value_uint64(pair, &intval) != 0) 3950 return (SET_ERROR(EINVAL)); 3951 3952 /* check prop value is enabled in features */ 3953 feature = zio_checksum_to_feature(intval & ZIO_CHECKSUM_MASK); 3954 if (feature == SPA_FEATURE_NONE) 3955 break; 3956 3957 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3958 return (err); 3959 /* 3960 * Salted checksums are not supported on root pools. 3961 */ 3962 if (spa_bootfs(spa) != 0 && 3963 intval < ZIO_CHECKSUM_FUNCTIONS && 3964 (zio_checksum_table[intval].ci_flags & 3965 ZCHECKSUM_FLAG_SALTED)) { 3966 spa_close(spa, FTAG); 3967 return (SET_ERROR(ERANGE)); 3968 } 3969 if (!spa_feature_is_enabled(spa, feature)) { 3970 spa_close(spa, FTAG); 3971 return (SET_ERROR(ENOTSUP)); 3972 } 3973 spa_close(spa, FTAG); 3974 break; 3975 } 3976 } 3977 3978 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3979 } 3980 3981 /* 3982 * Checks for a race condition to make sure we don't increment a feature flag 3983 * multiple times. 3984 */ 3985 static int 3986 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx) 3987 { 3988 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3989 spa_feature_t *featurep = arg; 3990 3991 if (!spa_feature_is_active(spa, *featurep)) 3992 return (0); 3993 else 3994 return (SET_ERROR(EBUSY)); 3995 } 3996 3997 /* 3998 * The callback invoked on feature activation in the sync task caused by 3999 * zfs_prop_activate_feature. 4000 */ 4001 static void 4002 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx) 4003 { 4004 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 4005 spa_feature_t *featurep = arg; 4006 4007 spa_feature_incr(spa, *featurep, tx); 4008 } 4009 4010 /* 4011 * Activates a feature on a pool in response to a property setting. This 4012 * creates a new sync task which modifies the pool to reflect the feature 4013 * as being active. 4014 */ 4015 static int 4016 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature) 4017 { 4018 int err; 4019 4020 /* EBUSY here indicates that the feature is already active */ 4021 err = dsl_sync_task(spa_name(spa), 4022 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync, 4023 &feature, 2, ZFS_SPACE_CHECK_RESERVED); 4024 4025 if (err != 0 && err != EBUSY) 4026 return (err); 4027 else 4028 return (0); 4029 } 4030 4031 /* 4032 * Removes properties from the given props list that fail permission checks 4033 * needed to clear them and to restore them in case of a receive error. For each 4034 * property, make sure we have both set and inherit permissions. 4035 * 4036 * Returns the first error encountered if any permission checks fail. If the 4037 * caller provides a non-NULL errlist, it also gives the complete list of names 4038 * of all the properties that failed a permission check along with the 4039 * corresponding error numbers. The caller is responsible for freeing the 4040 * returned errlist. 4041 * 4042 * If every property checks out successfully, zero is returned and the list 4043 * pointed at by errlist is NULL. 4044 */ 4045 static int 4046 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 4047 { 4048 zfs_cmd_t *zc; 4049 nvpair_t *pair, *next_pair; 4050 nvlist_t *errors; 4051 int err, rv = 0; 4052 4053 if (props == NULL) 4054 return (0); 4055 4056 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4057 4058 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 4059 (void) strcpy(zc->zc_name, dataset); 4060 pair = nvlist_next_nvpair(props, NULL); 4061 while (pair != NULL) { 4062 next_pair = nvlist_next_nvpair(props, pair); 4063 4064 (void) strcpy(zc->zc_value, nvpair_name(pair)); 4065 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 4066 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) { 4067 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 4068 VERIFY(nvlist_add_int32(errors, 4069 zc->zc_value, err) == 0); 4070 } 4071 pair = next_pair; 4072 } 4073 kmem_free(zc, sizeof (zfs_cmd_t)); 4074 4075 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 4076 nvlist_free(errors); 4077 errors = NULL; 4078 } else { 4079 VERIFY(nvpair_value_int32(pair, &rv) == 0); 4080 } 4081 4082 if (errlist == NULL) 4083 nvlist_free(errors); 4084 else 4085 *errlist = errors; 4086 4087 return (rv); 4088 } 4089 4090 static boolean_t 4091 propval_equals(nvpair_t *p1, nvpair_t *p2) 4092 { 4093 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 4094 /* dsl_prop_get_all_impl() format */ 4095 nvlist_t *attrs; 4096 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 4097 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4098 &p1) == 0); 4099 } 4100 4101 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 4102 nvlist_t *attrs; 4103 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 4104 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4105 &p2) == 0); 4106 } 4107 4108 if (nvpair_type(p1) != nvpair_type(p2)) 4109 return (B_FALSE); 4110 4111 if (nvpair_type(p1) == DATA_TYPE_STRING) { 4112 char *valstr1, *valstr2; 4113 4114 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 4115 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 4116 return (strcmp(valstr1, valstr2) == 0); 4117 } else { 4118 uint64_t intval1, intval2; 4119 4120 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 4121 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 4122 return (intval1 == intval2); 4123 } 4124 } 4125 4126 /* 4127 * Remove properties from props if they are not going to change (as determined 4128 * by comparison with origprops). Remove them from origprops as well, since we 4129 * do not need to clear or restore properties that won't change. 4130 */ 4131 static void 4132 props_reduce(nvlist_t *props, nvlist_t *origprops) 4133 { 4134 nvpair_t *pair, *next_pair; 4135 4136 if (origprops == NULL) 4137 return; /* all props need to be received */ 4138 4139 pair = nvlist_next_nvpair(props, NULL); 4140 while (pair != NULL) { 4141 const char *propname = nvpair_name(pair); 4142 nvpair_t *match; 4143 4144 next_pair = nvlist_next_nvpair(props, pair); 4145 4146 if ((nvlist_lookup_nvpair(origprops, propname, 4147 &match) != 0) || !propval_equals(pair, match)) 4148 goto next; /* need to set received value */ 4149 4150 /* don't clear the existing received value */ 4151 (void) nvlist_remove_nvpair(origprops, match); 4152 /* don't bother receiving the property */ 4153 (void) nvlist_remove_nvpair(props, pair); 4154 next: 4155 pair = next_pair; 4156 } 4157 } 4158 4159 /* 4160 * Extract properties that cannot be set PRIOR to the receipt of a dataset. 4161 * For example, refquota cannot be set until after the receipt of a dataset, 4162 * because in replication streams, an older/earlier snapshot may exceed the 4163 * refquota. We want to receive the older/earlier snapshot, but setting 4164 * refquota pre-receipt will set the dsl's ACTUAL quota, which will prevent 4165 * the older/earlier snapshot from being received (with EDQUOT). 4166 * 4167 * The ZFS test "zfs_receive_011_pos" demonstrates such a scenario. 4168 * 4169 * libzfs will need to be judicious handling errors encountered by props 4170 * extracted by this function. 4171 */ 4172 static nvlist_t * 4173 extract_delay_props(nvlist_t *props) 4174 { 4175 nvlist_t *delayprops; 4176 nvpair_t *nvp, *tmp; 4177 static const zfs_prop_t delayable[] = { ZFS_PROP_REFQUOTA, 0 }; 4178 int i; 4179 4180 VERIFY(nvlist_alloc(&delayprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4181 4182 for (nvp = nvlist_next_nvpair(props, NULL); nvp != NULL; 4183 nvp = nvlist_next_nvpair(props, nvp)) { 4184 /* 4185 * strcmp() is safe because zfs_prop_to_name() always returns 4186 * a bounded string. 4187 */ 4188 for (i = 0; delayable[i] != 0; i++) { 4189 if (strcmp(zfs_prop_to_name(delayable[i]), 4190 nvpair_name(nvp)) == 0) { 4191 break; 4192 } 4193 } 4194 if (delayable[i] != 0) { 4195 tmp = nvlist_prev_nvpair(props, nvp); 4196 VERIFY(nvlist_add_nvpair(delayprops, nvp) == 0); 4197 VERIFY(nvlist_remove_nvpair(props, nvp) == 0); 4198 nvp = tmp; 4199 } 4200 } 4201 4202 if (nvlist_empty(delayprops)) { 4203 nvlist_free(delayprops); 4204 delayprops = NULL; 4205 } 4206 return (delayprops); 4207 } 4208 4209 #ifdef DEBUG 4210 static boolean_t zfs_ioc_recv_inject_err; 4211 #endif 4212 4213 /* 4214 * inputs: 4215 * zc_name name of containing filesystem 4216 * zc_nvlist_src{_size} nvlist of properties to apply 4217 * zc_value name of snapshot to create 4218 * zc_string name of clone origin (if DRR_FLAG_CLONE) 4219 * zc_cookie file descriptor to recv from 4220 * zc_begin_record the BEGIN record of the stream (not byteswapped) 4221 * zc_guid force flag 4222 * zc_cleanup_fd cleanup-on-exit file descriptor 4223 * zc_action_handle handle for this guid/ds mapping (or zero on first call) 4224 * zc_resumable if data is incomplete assume sender will resume 4225 * 4226 * outputs: 4227 * zc_cookie number of bytes read 4228 * zc_nvlist_dst{_size} error for each unapplied received property 4229 * zc_obj zprop_errflags_t 4230 * zc_action_handle handle for this guid/ds mapping 4231 */ 4232 static int 4233 zfs_ioc_recv(zfs_cmd_t *zc) 4234 { 4235 file_t *fp; 4236 dmu_recv_cookie_t drc; 4237 boolean_t force = (boolean_t)zc->zc_guid; 4238 int fd; 4239 int error = 0; 4240 int props_error = 0; 4241 nvlist_t *errors; 4242 offset_t off; 4243 nvlist_t *props = NULL; /* sent properties */ 4244 nvlist_t *origprops = NULL; /* existing properties */ 4245 nvlist_t *delayprops = NULL; /* sent properties applied post-receive */ 4246 char *origin = NULL; 4247 char *tosnap; 4248 char tofs[ZFS_MAXNAMELEN]; 4249 boolean_t first_recvd_props = B_FALSE; 4250 4251 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 4252 strchr(zc->zc_value, '@') == NULL || 4253 strchr(zc->zc_value, '%')) 4254 return (SET_ERROR(EINVAL)); 4255 4256 (void) strcpy(tofs, zc->zc_value); 4257 tosnap = strchr(tofs, '@'); 4258 *tosnap++ = '\0'; 4259 4260 if (zc->zc_nvlist_src != NULL && 4261 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 4262 zc->zc_iflags, &props)) != 0) 4263 return (error); 4264 4265 fd = zc->zc_cookie; 4266 fp = getf(fd); 4267 if (fp == NULL) { 4268 nvlist_free(props); 4269 return (SET_ERROR(EBADF)); 4270 } 4271 4272 errors = fnvlist_alloc(); 4273 4274 if (zc->zc_string[0]) 4275 origin = zc->zc_string; 4276 4277 error = dmu_recv_begin(tofs, tosnap, 4278 &zc->zc_begin_record, force, zc->zc_resumable, origin, &drc); 4279 if (error != 0) 4280 goto out; 4281 4282 /* 4283 * Set properties before we receive the stream so that they are applied 4284 * to the new data. Note that we must call dmu_recv_stream() if 4285 * dmu_recv_begin() succeeds. 4286 */ 4287 if (props != NULL && !drc.drc_newfs) { 4288 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >= 4289 SPA_VERSION_RECVD_PROPS && 4290 !dsl_prop_get_hasrecvd(tofs)) 4291 first_recvd_props = B_TRUE; 4292 4293 /* 4294 * If new received properties are supplied, they are to 4295 * completely replace the existing received properties, so stash 4296 * away the existing ones. 4297 */ 4298 if (dsl_prop_get_received(tofs, &origprops) == 0) { 4299 nvlist_t *errlist = NULL; 4300 /* 4301 * Don't bother writing a property if its value won't 4302 * change (and avoid the unnecessary security checks). 4303 * 4304 * The first receive after SPA_VERSION_RECVD_PROPS is a 4305 * special case where we blow away all local properties 4306 * regardless. 4307 */ 4308 if (!first_recvd_props) 4309 props_reduce(props, origprops); 4310 if (zfs_check_clearable(tofs, origprops, &errlist) != 0) 4311 (void) nvlist_merge(errors, errlist, 0); 4312 nvlist_free(errlist); 4313 4314 if (clear_received_props(tofs, origprops, 4315 first_recvd_props ? NULL : props) != 0) 4316 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4317 } else { 4318 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4319 } 4320 } 4321 4322 if (props != NULL) { 4323 props_error = dsl_prop_set_hasrecvd(tofs); 4324 4325 if (props_error == 0) { 4326 delayprops = extract_delay_props(props); 4327 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4328 props, errors); 4329 } 4330 } 4331 4332 off = fp->f_offset; 4333 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd, 4334 &zc->zc_action_handle); 4335 4336 if (error == 0) { 4337 zfsvfs_t *zfsvfs = NULL; 4338 4339 if (getzfsvfs(tofs, &zfsvfs) == 0) { 4340 /* online recv */ 4341 int end_err; 4342 4343 error = zfs_suspend_fs(zfsvfs); 4344 /* 4345 * If the suspend fails, then the recv_end will 4346 * likely also fail, and clean up after itself. 4347 */ 4348 end_err = dmu_recv_end(&drc, zfsvfs); 4349 if (error == 0) 4350 error = zfs_resume_fs(zfsvfs, tofs); 4351 error = error ? error : end_err; 4352 VFS_RELE(zfsvfs->z_vfs); 4353 } else { 4354 error = dmu_recv_end(&drc, NULL); 4355 } 4356 4357 /* Set delayed properties now, after we're done receiving. */ 4358 if (delayprops != NULL && error == 0) { 4359 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4360 delayprops, errors); 4361 } 4362 } 4363 4364 if (delayprops != NULL) { 4365 /* 4366 * Merge delayed props back in with initial props, in case 4367 * we're DEBUG and zfs_ioc_recv_inject_err is set (which means 4368 * we have to make sure clear_received_props() includes 4369 * the delayed properties). 4370 * 4371 * Since zfs_ioc_recv_inject_err is only in DEBUG kernels, 4372 * using ASSERT() will be just like a VERIFY. 4373 */ 4374 ASSERT(nvlist_merge(props, delayprops, 0) == 0); 4375 nvlist_free(delayprops); 4376 } 4377 4378 /* 4379 * Now that all props, initial and delayed, are set, report the prop 4380 * errors to the caller. 4381 */ 4382 if (zc->zc_nvlist_dst_size != 0 && 4383 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 || 4384 put_nvlist(zc, errors) != 0)) { 4385 /* 4386 * Caller made zc->zc_nvlist_dst less than the minimum expected 4387 * size or supplied an invalid address. 4388 */ 4389 props_error = SET_ERROR(EINVAL); 4390 } 4391 4392 zc->zc_cookie = off - fp->f_offset; 4393 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4394 fp->f_offset = off; 4395 4396 #ifdef DEBUG 4397 if (zfs_ioc_recv_inject_err) { 4398 zfs_ioc_recv_inject_err = B_FALSE; 4399 error = 1; 4400 } 4401 #endif 4402 /* 4403 * On error, restore the original props. 4404 */ 4405 if (error != 0 && props != NULL && !drc.drc_newfs) { 4406 if (clear_received_props(tofs, props, NULL) != 0) { 4407 /* 4408 * We failed to clear the received properties. 4409 * Since we may have left a $recvd value on the 4410 * system, we can't clear the $hasrecvd flag. 4411 */ 4412 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4413 } else if (first_recvd_props) { 4414 dsl_prop_unset_hasrecvd(tofs); 4415 } 4416 4417 if (origprops == NULL && !drc.drc_newfs) { 4418 /* We failed to stash the original properties. */ 4419 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4420 } 4421 4422 /* 4423 * dsl_props_set() will not convert RECEIVED to LOCAL on or 4424 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 4425 * explictly if we're restoring local properties cleared in the 4426 * first new-style receive. 4427 */ 4428 if (origprops != NULL && 4429 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 4430 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 4431 origprops, NULL) != 0) { 4432 /* 4433 * We stashed the original properties but failed to 4434 * restore them. 4435 */ 4436 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4437 } 4438 } 4439 out: 4440 nvlist_free(props); 4441 nvlist_free(origprops); 4442 nvlist_free(errors); 4443 releasef(fd); 4444 4445 if (error == 0) 4446 error = props_error; 4447 4448 return (error); 4449 } 4450 4451 /* 4452 * inputs: 4453 * zc_name name of snapshot to send 4454 * zc_cookie file descriptor to send stream to 4455 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj) 4456 * zc_sendobj objsetid of snapshot to send 4457 * zc_fromobj objsetid of incremental fromsnap (may be zero) 4458 * zc_guid if set, estimate size of stream only. zc_cookie is ignored. 4459 * output size in zc_objset_type. 4460 * zc_flags lzc_send_flags 4461 * 4462 * outputs: 4463 * zc_objset_type estimated size, if zc_guid is set 4464 */ 4465 static int 4466 zfs_ioc_send(zfs_cmd_t *zc) 4467 { 4468 int error; 4469 offset_t off; 4470 boolean_t estimate = (zc->zc_guid != 0); 4471 boolean_t embedok = (zc->zc_flags & 0x1); 4472 boolean_t large_block_ok = (zc->zc_flags & 0x2); 4473 4474 if (zc->zc_obj != 0) { 4475 dsl_pool_t *dp; 4476 dsl_dataset_t *tosnap; 4477 4478 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4479 if (error != 0) 4480 return (error); 4481 4482 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4483 if (error != 0) { 4484 dsl_pool_rele(dp, FTAG); 4485 return (error); 4486 } 4487 4488 if (dsl_dir_is_clone(tosnap->ds_dir)) 4489 zc->zc_fromobj = 4490 dsl_dir_phys(tosnap->ds_dir)->dd_origin_obj; 4491 dsl_dataset_rele(tosnap, FTAG); 4492 dsl_pool_rele(dp, FTAG); 4493 } 4494 4495 if (estimate) { 4496 dsl_pool_t *dp; 4497 dsl_dataset_t *tosnap; 4498 dsl_dataset_t *fromsnap = NULL; 4499 4500 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4501 if (error != 0) 4502 return (error); 4503 4504 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4505 if (error != 0) { 4506 dsl_pool_rele(dp, FTAG); 4507 return (error); 4508 } 4509 4510 if (zc->zc_fromobj != 0) { 4511 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, 4512 FTAG, &fromsnap); 4513 if (error != 0) { 4514 dsl_dataset_rele(tosnap, FTAG); 4515 dsl_pool_rele(dp, FTAG); 4516 return (error); 4517 } 4518 } 4519 4520 error = dmu_send_estimate(tosnap, fromsnap, 4521 &zc->zc_objset_type); 4522 4523 if (fromsnap != NULL) 4524 dsl_dataset_rele(fromsnap, FTAG); 4525 dsl_dataset_rele(tosnap, FTAG); 4526 dsl_pool_rele(dp, FTAG); 4527 } else { 4528 file_t *fp = getf(zc->zc_cookie); 4529 if (fp == NULL) 4530 return (SET_ERROR(EBADF)); 4531 4532 off = fp->f_offset; 4533 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj, 4534 zc->zc_fromobj, embedok, large_block_ok, 4535 zc->zc_cookie, fp->f_vnode, &off); 4536 4537 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4538 fp->f_offset = off; 4539 releasef(zc->zc_cookie); 4540 } 4541 return (error); 4542 } 4543 4544 /* 4545 * inputs: 4546 * zc_name name of snapshot on which to report progress 4547 * zc_cookie file descriptor of send stream 4548 * 4549 * outputs: 4550 * zc_cookie number of bytes written in send stream thus far 4551 */ 4552 static int 4553 zfs_ioc_send_progress(zfs_cmd_t *zc) 4554 { 4555 dsl_pool_t *dp; 4556 dsl_dataset_t *ds; 4557 dmu_sendarg_t *dsp = NULL; 4558 int error; 4559 4560 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4561 if (error != 0) 4562 return (error); 4563 4564 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds); 4565 if (error != 0) { 4566 dsl_pool_rele(dp, FTAG); 4567 return (error); 4568 } 4569 4570 mutex_enter(&ds->ds_sendstream_lock); 4571 4572 /* 4573 * Iterate over all the send streams currently active on this dataset. 4574 * If there's one which matches the specified file descriptor _and_ the 4575 * stream was started by the current process, return the progress of 4576 * that stream. 4577 */ 4578 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL; 4579 dsp = list_next(&ds->ds_sendstreams, dsp)) { 4580 if (dsp->dsa_outfd == zc->zc_cookie && 4581 dsp->dsa_proc == curproc) 4582 break; 4583 } 4584 4585 if (dsp != NULL) 4586 zc->zc_cookie = *(dsp->dsa_off); 4587 else 4588 error = SET_ERROR(ENOENT); 4589 4590 mutex_exit(&ds->ds_sendstream_lock); 4591 dsl_dataset_rele(ds, FTAG); 4592 dsl_pool_rele(dp, FTAG); 4593 return (error); 4594 } 4595 4596 static int 4597 zfs_ioc_inject_fault(zfs_cmd_t *zc) 4598 { 4599 int id, error; 4600 4601 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 4602 &zc->zc_inject_record); 4603 4604 if (error == 0) 4605 zc->zc_guid = (uint64_t)id; 4606 4607 return (error); 4608 } 4609 4610 static int 4611 zfs_ioc_clear_fault(zfs_cmd_t *zc) 4612 { 4613 return (zio_clear_fault((int)zc->zc_guid)); 4614 } 4615 4616 static int 4617 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 4618 { 4619 int id = (int)zc->zc_guid; 4620 int error; 4621 4622 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 4623 &zc->zc_inject_record); 4624 4625 zc->zc_guid = id; 4626 4627 return (error); 4628 } 4629 4630 static int 4631 zfs_ioc_error_log(zfs_cmd_t *zc) 4632 { 4633 spa_t *spa; 4634 int error; 4635 size_t count = (size_t)zc->zc_nvlist_dst_size; 4636 4637 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 4638 return (error); 4639 4640 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 4641 &count); 4642 if (error == 0) 4643 zc->zc_nvlist_dst_size = count; 4644 else 4645 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 4646 4647 spa_close(spa, FTAG); 4648 4649 return (error); 4650 } 4651 4652 static int 4653 zfs_ioc_clear(zfs_cmd_t *zc) 4654 { 4655 spa_t *spa; 4656 vdev_t *vd; 4657 int error; 4658 4659 /* 4660 * On zpool clear we also fix up missing slogs 4661 */ 4662 mutex_enter(&spa_namespace_lock); 4663 spa = spa_lookup(zc->zc_name); 4664 if (spa == NULL) { 4665 mutex_exit(&spa_namespace_lock); 4666 return (SET_ERROR(EIO)); 4667 } 4668 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 4669 /* we need to let spa_open/spa_load clear the chains */ 4670 spa_set_log_state(spa, SPA_LOG_CLEAR); 4671 } 4672 spa->spa_last_open_failed = 0; 4673 mutex_exit(&spa_namespace_lock); 4674 4675 if (zc->zc_cookie & ZPOOL_NO_REWIND) { 4676 error = spa_open(zc->zc_name, &spa, FTAG); 4677 } else { 4678 nvlist_t *policy; 4679 nvlist_t *config = NULL; 4680 4681 if (zc->zc_nvlist_src == NULL) 4682 return (SET_ERROR(EINVAL)); 4683 4684 if ((error = get_nvlist(zc->zc_nvlist_src, 4685 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 4686 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 4687 policy, &config); 4688 if (config != NULL) { 4689 int err; 4690 4691 if ((err = put_nvlist(zc, config)) != 0) 4692 error = err; 4693 nvlist_free(config); 4694 } 4695 nvlist_free(policy); 4696 } 4697 } 4698 4699 if (error != 0) 4700 return (error); 4701 4702 spa_vdev_state_enter(spa, SCL_NONE); 4703 4704 if (zc->zc_guid == 0) { 4705 vd = NULL; 4706 } else { 4707 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 4708 if (vd == NULL) { 4709 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 4710 spa_close(spa, FTAG); 4711 return (SET_ERROR(ENODEV)); 4712 } 4713 } 4714 4715 vdev_clear(spa, vd); 4716 4717 (void) spa_vdev_state_exit(spa, NULL, 0); 4718 4719 /* 4720 * Resume any suspended I/Os. 4721 */ 4722 if (zio_resume(spa) != 0) 4723 error = SET_ERROR(EIO); 4724 4725 spa_close(spa, FTAG); 4726 4727 return (error); 4728 } 4729 4730 static int 4731 zfs_ioc_pool_reopen(zfs_cmd_t *zc) 4732 { 4733 spa_t *spa; 4734 int error; 4735 4736 error = spa_open(zc->zc_name, &spa, FTAG); 4737 if (error != 0) 4738 return (error); 4739 4740 spa_vdev_state_enter(spa, SCL_NONE); 4741 4742 /* 4743 * If a resilver is already in progress then set the 4744 * spa_scrub_reopen flag to B_TRUE so that we don't restart 4745 * the scan as a side effect of the reopen. Otherwise, let 4746 * vdev_open() decided if a resilver is required. 4747 */ 4748 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool); 4749 vdev_reopen(spa->spa_root_vdev); 4750 spa->spa_scrub_reopen = B_FALSE; 4751 4752 (void) spa_vdev_state_exit(spa, NULL, 0); 4753 spa_close(spa, FTAG); 4754 return (0); 4755 } 4756 /* 4757 * inputs: 4758 * zc_name name of filesystem 4759 * zc_value name of origin snapshot 4760 * 4761 * outputs: 4762 * zc_string name of conflicting snapshot, if there is one 4763 */ 4764 static int 4765 zfs_ioc_promote(zfs_cmd_t *zc) 4766 { 4767 char *cp; 4768 4769 /* 4770 * We don't need to unmount *all* the origin fs's snapshots, but 4771 * it's easier. 4772 */ 4773 cp = strchr(zc->zc_value, '@'); 4774 if (cp) 4775 *cp = '\0'; 4776 (void) dmu_objset_find(zc->zc_value, 4777 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS); 4778 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 4779 } 4780 4781 /* 4782 * Retrieve a single {user|group}{used|quota}@... property. 4783 * 4784 * inputs: 4785 * zc_name name of filesystem 4786 * zc_objset_type zfs_userquota_prop_t 4787 * zc_value domain name (eg. "S-1-234-567-89") 4788 * zc_guid RID/UID/GID 4789 * 4790 * outputs: 4791 * zc_cookie property value 4792 */ 4793 static int 4794 zfs_ioc_userspace_one(zfs_cmd_t *zc) 4795 { 4796 zfsvfs_t *zfsvfs; 4797 int error; 4798 4799 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 4800 return (SET_ERROR(EINVAL)); 4801 4802 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4803 if (error != 0) 4804 return (error); 4805 4806 error = zfs_userspace_one(zfsvfs, 4807 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 4808 zfsvfs_rele(zfsvfs, FTAG); 4809 4810 return (error); 4811 } 4812 4813 /* 4814 * inputs: 4815 * zc_name name of filesystem 4816 * zc_cookie zap cursor 4817 * zc_objset_type zfs_userquota_prop_t 4818 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 4819 * 4820 * outputs: 4821 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 4822 * zc_cookie zap cursor 4823 */ 4824 static int 4825 zfs_ioc_userspace_many(zfs_cmd_t *zc) 4826 { 4827 zfsvfs_t *zfsvfs; 4828 int bufsize = zc->zc_nvlist_dst_size; 4829 4830 if (bufsize <= 0) 4831 return (SET_ERROR(ENOMEM)); 4832 4833 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4834 if (error != 0) 4835 return (error); 4836 4837 void *buf = kmem_alloc(bufsize, KM_SLEEP); 4838 4839 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 4840 buf, &zc->zc_nvlist_dst_size); 4841 4842 if (error == 0) { 4843 error = xcopyout(buf, 4844 (void *)(uintptr_t)zc->zc_nvlist_dst, 4845 zc->zc_nvlist_dst_size); 4846 } 4847 kmem_free(buf, bufsize); 4848 zfsvfs_rele(zfsvfs, FTAG); 4849 4850 return (error); 4851 } 4852 4853 /* 4854 * inputs: 4855 * zc_name name of filesystem 4856 * 4857 * outputs: 4858 * none 4859 */ 4860 static int 4861 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 4862 { 4863 objset_t *os; 4864 int error = 0; 4865 zfsvfs_t *zfsvfs; 4866 4867 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 4868 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 4869 /* 4870 * If userused is not enabled, it may be because the 4871 * objset needs to be closed & reopened (to grow the 4872 * objset_phys_t). Suspend/resume the fs will do that. 4873 */ 4874 error = zfs_suspend_fs(zfsvfs); 4875 if (error == 0) { 4876 dmu_objset_refresh_ownership(zfsvfs->z_os, 4877 zfsvfs); 4878 error = zfs_resume_fs(zfsvfs, zc->zc_name); 4879 } 4880 } 4881 if (error == 0) 4882 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 4883 VFS_RELE(zfsvfs->z_vfs); 4884 } else { 4885 /* XXX kind of reading contents without owning */ 4886 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4887 if (error != 0) 4888 return (error); 4889 4890 error = dmu_objset_userspace_upgrade(os); 4891 dmu_objset_rele(os, FTAG); 4892 } 4893 4894 return (error); 4895 } 4896 4897 /* 4898 * We don't want to have a hard dependency 4899 * against some special symbols in sharefs 4900 * nfs, and smbsrv. Determine them if needed when 4901 * the first file system is shared. 4902 * Neither sharefs, nfs or smbsrv are unloadable modules. 4903 */ 4904 int (*znfsexport_fs)(void *arg); 4905 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 4906 int (*zsmbexport_fs)(void *arg, boolean_t add_share); 4907 4908 int zfs_nfsshare_inited; 4909 int zfs_smbshare_inited; 4910 4911 ddi_modhandle_t nfs_mod; 4912 ddi_modhandle_t sharefs_mod; 4913 ddi_modhandle_t smbsrv_mod; 4914 kmutex_t zfs_share_lock; 4915 4916 static int 4917 zfs_init_sharefs() 4918 { 4919 int error; 4920 4921 ASSERT(MUTEX_HELD(&zfs_share_lock)); 4922 /* Both NFS and SMB shares also require sharetab support. */ 4923 if (sharefs_mod == NULL && ((sharefs_mod = 4924 ddi_modopen("fs/sharefs", 4925 KRTLD_MODE_FIRST, &error)) == NULL)) { 4926 return (SET_ERROR(ENOSYS)); 4927 } 4928 if (zshare_fs == NULL && ((zshare_fs = 4929 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 4930 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 4931 return (SET_ERROR(ENOSYS)); 4932 } 4933 return (0); 4934 } 4935 4936 static int 4937 zfs_ioc_share(zfs_cmd_t *zc) 4938 { 4939 int error; 4940 int opcode; 4941 4942 switch (zc->zc_share.z_sharetype) { 4943 case ZFS_SHARE_NFS: 4944 case ZFS_UNSHARE_NFS: 4945 if (zfs_nfsshare_inited == 0) { 4946 mutex_enter(&zfs_share_lock); 4947 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 4948 KRTLD_MODE_FIRST, &error)) == NULL)) { 4949 mutex_exit(&zfs_share_lock); 4950 return (SET_ERROR(ENOSYS)); 4951 } 4952 if (znfsexport_fs == NULL && 4953 ((znfsexport_fs = (int (*)(void *)) 4954 ddi_modsym(nfs_mod, 4955 "nfs_export", &error)) == NULL)) { 4956 mutex_exit(&zfs_share_lock); 4957 return (SET_ERROR(ENOSYS)); 4958 } 4959 error = zfs_init_sharefs(); 4960 if (error != 0) { 4961 mutex_exit(&zfs_share_lock); 4962 return (SET_ERROR(ENOSYS)); 4963 } 4964 zfs_nfsshare_inited = 1; 4965 mutex_exit(&zfs_share_lock); 4966 } 4967 break; 4968 case ZFS_SHARE_SMB: 4969 case ZFS_UNSHARE_SMB: 4970 if (zfs_smbshare_inited == 0) { 4971 mutex_enter(&zfs_share_lock); 4972 if (smbsrv_mod == NULL && ((smbsrv_mod = 4973 ddi_modopen("drv/smbsrv", 4974 KRTLD_MODE_FIRST, &error)) == NULL)) { 4975 mutex_exit(&zfs_share_lock); 4976 return (SET_ERROR(ENOSYS)); 4977 } 4978 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 4979 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 4980 "smb_server_share", &error)) == NULL)) { 4981 mutex_exit(&zfs_share_lock); 4982 return (SET_ERROR(ENOSYS)); 4983 } 4984 error = zfs_init_sharefs(); 4985 if (error != 0) { 4986 mutex_exit(&zfs_share_lock); 4987 return (SET_ERROR(ENOSYS)); 4988 } 4989 zfs_smbshare_inited = 1; 4990 mutex_exit(&zfs_share_lock); 4991 } 4992 break; 4993 default: 4994 return (SET_ERROR(EINVAL)); 4995 } 4996 4997 switch (zc->zc_share.z_sharetype) { 4998 case ZFS_SHARE_NFS: 4999 case ZFS_UNSHARE_NFS: 5000 if (error = 5001 znfsexport_fs((void *) 5002 (uintptr_t)zc->zc_share.z_exportdata)) 5003 return (error); 5004 break; 5005 case ZFS_SHARE_SMB: 5006 case ZFS_UNSHARE_SMB: 5007 if (error = zsmbexport_fs((void *) 5008 (uintptr_t)zc->zc_share.z_exportdata, 5009 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 5010 B_TRUE: B_FALSE)) { 5011 return (error); 5012 } 5013 break; 5014 } 5015 5016 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 5017 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 5018 SHAREFS_ADD : SHAREFS_REMOVE; 5019 5020 /* 5021 * Add or remove share from sharetab 5022 */ 5023 error = zshare_fs(opcode, 5024 (void *)(uintptr_t)zc->zc_share.z_sharedata, 5025 zc->zc_share.z_sharemax); 5026 5027 return (error); 5028 5029 } 5030 5031 ace_t full_access[] = { 5032 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 5033 }; 5034 5035 /* 5036 * inputs: 5037 * zc_name name of containing filesystem 5038 * zc_obj object # beyond which we want next in-use object # 5039 * 5040 * outputs: 5041 * zc_obj next in-use object # 5042 */ 5043 static int 5044 zfs_ioc_next_obj(zfs_cmd_t *zc) 5045 { 5046 objset_t *os = NULL; 5047 int error; 5048 5049 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 5050 if (error != 0) 5051 return (error); 5052 5053 error = dmu_object_next(os, &zc->zc_obj, B_FALSE, 5054 dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg); 5055 5056 dmu_objset_rele(os, FTAG); 5057 return (error); 5058 } 5059 5060 /* 5061 * inputs: 5062 * zc_name name of filesystem 5063 * zc_value prefix name for snapshot 5064 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 5065 * 5066 * outputs: 5067 * zc_value short name of new snapshot 5068 */ 5069 static int 5070 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc) 5071 { 5072 char *snap_name; 5073 char *hold_name; 5074 int error; 5075 minor_t minor; 5076 5077 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor); 5078 if (error != 0) 5079 return (error); 5080 5081 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value, 5082 (u_longlong_t)ddi_get_lbolt64()); 5083 hold_name = kmem_asprintf("%%%s", zc->zc_value); 5084 5085 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor, 5086 hold_name); 5087 if (error == 0) 5088 (void) strcpy(zc->zc_value, snap_name); 5089 strfree(snap_name); 5090 strfree(hold_name); 5091 zfs_onexit_fd_rele(zc->zc_cleanup_fd); 5092 return (error); 5093 } 5094 5095 /* 5096 * inputs: 5097 * zc_name name of "to" snapshot 5098 * zc_value name of "from" snapshot 5099 * zc_cookie file descriptor to write diff data on 5100 * 5101 * outputs: 5102 * dmu_diff_record_t's to the file descriptor 5103 */ 5104 static int 5105 zfs_ioc_diff(zfs_cmd_t *zc) 5106 { 5107 file_t *fp; 5108 offset_t off; 5109 int error; 5110 5111 fp = getf(zc->zc_cookie); 5112 if (fp == NULL) 5113 return (SET_ERROR(EBADF)); 5114 5115 off = fp->f_offset; 5116 5117 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off); 5118 5119 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5120 fp->f_offset = off; 5121 releasef(zc->zc_cookie); 5122 5123 return (error); 5124 } 5125 5126 /* 5127 * Remove all ACL files in shares dir 5128 */ 5129 static int 5130 zfs_smb_acl_purge(znode_t *dzp) 5131 { 5132 zap_cursor_t zc; 5133 zap_attribute_t zap; 5134 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 5135 int error; 5136 5137 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 5138 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 5139 zap_cursor_advance(&zc)) { 5140 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 5141 NULL, 0)) != 0) 5142 break; 5143 } 5144 zap_cursor_fini(&zc); 5145 return (error); 5146 } 5147 5148 static int 5149 zfs_ioc_smb_acl(zfs_cmd_t *zc) 5150 { 5151 vnode_t *vp; 5152 znode_t *dzp; 5153 vnode_t *resourcevp = NULL; 5154 znode_t *sharedir; 5155 zfsvfs_t *zfsvfs; 5156 nvlist_t *nvlist; 5157 char *src, *target; 5158 vattr_t vattr; 5159 vsecattr_t vsec; 5160 int error = 0; 5161 5162 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 5163 NO_FOLLOW, NULL, &vp)) != 0) 5164 return (error); 5165 5166 /* Now make sure mntpnt and dataset are ZFS */ 5167 5168 if (vp->v_vfsp->vfs_fstype != zfsfstype || 5169 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 5170 zc->zc_name) != 0)) { 5171 VN_RELE(vp); 5172 return (SET_ERROR(EINVAL)); 5173 } 5174 5175 dzp = VTOZ(vp); 5176 zfsvfs = dzp->z_zfsvfs; 5177 ZFS_ENTER(zfsvfs); 5178 5179 /* 5180 * Create share dir if its missing. 5181 */ 5182 mutex_enter(&zfsvfs->z_lock); 5183 if (zfsvfs->z_shares_dir == 0) { 5184 dmu_tx_t *tx; 5185 5186 tx = dmu_tx_create(zfsvfs->z_os); 5187 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 5188 ZFS_SHARES_DIR); 5189 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 5190 error = dmu_tx_assign(tx, TXG_WAIT); 5191 if (error != 0) { 5192 dmu_tx_abort(tx); 5193 } else { 5194 error = zfs_create_share_dir(zfsvfs, tx); 5195 dmu_tx_commit(tx); 5196 } 5197 if (error != 0) { 5198 mutex_exit(&zfsvfs->z_lock); 5199 VN_RELE(vp); 5200 ZFS_EXIT(zfsvfs); 5201 return (error); 5202 } 5203 } 5204 mutex_exit(&zfsvfs->z_lock); 5205 5206 ASSERT(zfsvfs->z_shares_dir); 5207 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 5208 VN_RELE(vp); 5209 ZFS_EXIT(zfsvfs); 5210 return (error); 5211 } 5212 5213 switch (zc->zc_cookie) { 5214 case ZFS_SMB_ACL_ADD: 5215 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 5216 vattr.va_type = VREG; 5217 vattr.va_mode = S_IFREG|0777; 5218 vattr.va_uid = 0; 5219 vattr.va_gid = 0; 5220 5221 vsec.vsa_mask = VSA_ACE; 5222 vsec.vsa_aclentp = &full_access; 5223 vsec.vsa_aclentsz = sizeof (full_access); 5224 vsec.vsa_aclcnt = 1; 5225 5226 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 5227 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 5228 if (resourcevp) 5229 VN_RELE(resourcevp); 5230 break; 5231 5232 case ZFS_SMB_ACL_REMOVE: 5233 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 5234 NULL, 0); 5235 break; 5236 5237 case ZFS_SMB_ACL_RENAME: 5238 if ((error = get_nvlist(zc->zc_nvlist_src, 5239 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 5240 VN_RELE(vp); 5241 VN_RELE(ZTOV(sharedir)); 5242 ZFS_EXIT(zfsvfs); 5243 return (error); 5244 } 5245 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 5246 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 5247 &target)) { 5248 VN_RELE(vp); 5249 VN_RELE(ZTOV(sharedir)); 5250 ZFS_EXIT(zfsvfs); 5251 nvlist_free(nvlist); 5252 return (error); 5253 } 5254 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 5255 kcred, NULL, 0); 5256 nvlist_free(nvlist); 5257 break; 5258 5259 case ZFS_SMB_ACL_PURGE: 5260 error = zfs_smb_acl_purge(sharedir); 5261 break; 5262 5263 default: 5264 error = SET_ERROR(EINVAL); 5265 break; 5266 } 5267 5268 VN_RELE(vp); 5269 VN_RELE(ZTOV(sharedir)); 5270 5271 ZFS_EXIT(zfsvfs); 5272 5273 return (error); 5274 } 5275 5276 /* 5277 * innvl: { 5278 * "holds" -> { snapname -> holdname (string), ... } 5279 * (optional) "cleanup_fd" -> fd (int32) 5280 * } 5281 * 5282 * outnvl: { 5283 * snapname -> error value (int32) 5284 * ... 5285 * } 5286 */ 5287 /* ARGSUSED */ 5288 static int 5289 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist) 5290 { 5291 nvpair_t *pair; 5292 nvlist_t *holds; 5293 int cleanup_fd = -1; 5294 int error; 5295 minor_t minor = 0; 5296 5297 error = nvlist_lookup_nvlist(args, "holds", &holds); 5298 if (error != 0) 5299 return (SET_ERROR(EINVAL)); 5300 5301 /* make sure the user didn't pass us any invalid (empty) tags */ 5302 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; 5303 pair = nvlist_next_nvpair(holds, pair)) { 5304 char *htag; 5305 5306 error = nvpair_value_string(pair, &htag); 5307 if (error != 0) 5308 return (SET_ERROR(error)); 5309 5310 if (strlen(htag) == 0) 5311 return (SET_ERROR(EINVAL)); 5312 } 5313 5314 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) { 5315 error = zfs_onexit_fd_hold(cleanup_fd, &minor); 5316 if (error != 0) 5317 return (error); 5318 } 5319 5320 error = dsl_dataset_user_hold(holds, minor, errlist); 5321 if (minor != 0) 5322 zfs_onexit_fd_rele(cleanup_fd); 5323 return (error); 5324 } 5325 5326 /* 5327 * innvl is not used. 5328 * 5329 * outnvl: { 5330 * holdname -> time added (uint64 seconds since epoch) 5331 * ... 5332 * } 5333 */ 5334 /* ARGSUSED */ 5335 static int 5336 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl) 5337 { 5338 return (dsl_dataset_get_holds(snapname, outnvl)); 5339 } 5340 5341 /* 5342 * innvl: { 5343 * snapname -> { holdname, ... } 5344 * ... 5345 * } 5346 * 5347 * outnvl: { 5348 * snapname -> error value (int32) 5349 * ... 5350 * } 5351 */ 5352 /* ARGSUSED */ 5353 static int 5354 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist) 5355 { 5356 return (dsl_dataset_user_release(holds, errlist)); 5357 } 5358 5359 /* 5360 * inputs: 5361 * zc_name name of new filesystem or snapshot 5362 * zc_value full name of old snapshot 5363 * 5364 * outputs: 5365 * zc_cookie space in bytes 5366 * zc_objset_type compressed space in bytes 5367 * zc_perm_action uncompressed space in bytes 5368 */ 5369 static int 5370 zfs_ioc_space_written(zfs_cmd_t *zc) 5371 { 5372 int error; 5373 dsl_pool_t *dp; 5374 dsl_dataset_t *new, *old; 5375 5376 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 5377 if (error != 0) 5378 return (error); 5379 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new); 5380 if (error != 0) { 5381 dsl_pool_rele(dp, FTAG); 5382 return (error); 5383 } 5384 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old); 5385 if (error != 0) { 5386 dsl_dataset_rele(new, FTAG); 5387 dsl_pool_rele(dp, FTAG); 5388 return (error); 5389 } 5390 5391 error = dsl_dataset_space_written(old, new, &zc->zc_cookie, 5392 &zc->zc_objset_type, &zc->zc_perm_action); 5393 dsl_dataset_rele(old, FTAG); 5394 dsl_dataset_rele(new, FTAG); 5395 dsl_pool_rele(dp, FTAG); 5396 return (error); 5397 } 5398 5399 /* 5400 * innvl: { 5401 * "firstsnap" -> snapshot name 5402 * } 5403 * 5404 * outnvl: { 5405 * "used" -> space in bytes 5406 * "compressed" -> compressed space in bytes 5407 * "uncompressed" -> uncompressed space in bytes 5408 * } 5409 */ 5410 static int 5411 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl) 5412 { 5413 int error; 5414 dsl_pool_t *dp; 5415 dsl_dataset_t *new, *old; 5416 char *firstsnap; 5417 uint64_t used, comp, uncomp; 5418 5419 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0) 5420 return (SET_ERROR(EINVAL)); 5421 5422 error = dsl_pool_hold(lastsnap, FTAG, &dp); 5423 if (error != 0) 5424 return (error); 5425 5426 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new); 5427 if (error == 0 && !new->ds_is_snapshot) { 5428 dsl_dataset_rele(new, FTAG); 5429 error = SET_ERROR(EINVAL); 5430 } 5431 if (error != 0) { 5432 dsl_pool_rele(dp, FTAG); 5433 return (error); 5434 } 5435 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old); 5436 if (error == 0 && !old->ds_is_snapshot) { 5437 dsl_dataset_rele(old, FTAG); 5438 error = SET_ERROR(EINVAL); 5439 } 5440 if (error != 0) { 5441 dsl_dataset_rele(new, FTAG); 5442 dsl_pool_rele(dp, FTAG); 5443 return (error); 5444 } 5445 5446 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp); 5447 dsl_dataset_rele(old, FTAG); 5448 dsl_dataset_rele(new, FTAG); 5449 dsl_pool_rele(dp, FTAG); 5450 fnvlist_add_uint64(outnvl, "used", used); 5451 fnvlist_add_uint64(outnvl, "compressed", comp); 5452 fnvlist_add_uint64(outnvl, "uncompressed", uncomp); 5453 return (error); 5454 } 5455 5456 /* 5457 * innvl: { 5458 * "fd" -> file descriptor to write stream to (int32) 5459 * (optional) "fromsnap" -> full snap name to send an incremental from 5460 * (optional) "largeblockok" -> (value ignored) 5461 * indicates that blocks > 128KB are permitted 5462 * (optional) "embedok" -> (value ignored) 5463 * presence indicates DRR_WRITE_EMBEDDED records are permitted 5464 * (optional) "resume_object" and "resume_offset" -> (uint64) 5465 * if present, resume send stream from specified object and offset. 5466 * } 5467 * 5468 * outnvl is unused 5469 */ 5470 /* ARGSUSED */ 5471 static int 5472 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5473 { 5474 int error; 5475 offset_t off; 5476 char *fromname = NULL; 5477 int fd; 5478 boolean_t largeblockok; 5479 boolean_t embedok; 5480 uint64_t resumeobj = 0; 5481 uint64_t resumeoff = 0; 5482 5483 error = nvlist_lookup_int32(innvl, "fd", &fd); 5484 if (error != 0) 5485 return (SET_ERROR(EINVAL)); 5486 5487 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname); 5488 5489 largeblockok = nvlist_exists(innvl, "largeblockok"); 5490 embedok = nvlist_exists(innvl, "embedok"); 5491 5492 (void) nvlist_lookup_uint64(innvl, "resume_object", &resumeobj); 5493 (void) nvlist_lookup_uint64(innvl, "resume_offset", &resumeoff); 5494 5495 file_t *fp = getf(fd); 5496 if (fp == NULL) 5497 return (SET_ERROR(EBADF)); 5498 5499 off = fp->f_offset; 5500 error = dmu_send(snapname, fromname, embedok, largeblockok, fd, 5501 resumeobj, resumeoff, fp->f_vnode, &off); 5502 5503 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5504 fp->f_offset = off; 5505 releasef(fd); 5506 return (error); 5507 } 5508 5509 /* 5510 * Determine approximately how large a zfs send stream will be -- the number 5511 * of bytes that will be written to the fd supplied to zfs_ioc_send_new(). 5512 * 5513 * innvl: { 5514 * (optional) "from" -> full snap or bookmark name to send an incremental 5515 * from 5516 * } 5517 * 5518 * outnvl: { 5519 * "space" -> bytes of space (uint64) 5520 * } 5521 */ 5522 static int 5523 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5524 { 5525 dsl_pool_t *dp; 5526 dsl_dataset_t *tosnap; 5527 int error; 5528 char *fromname; 5529 uint64_t space; 5530 5531 error = dsl_pool_hold(snapname, FTAG, &dp); 5532 if (error != 0) 5533 return (error); 5534 5535 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap); 5536 if (error != 0) { 5537 dsl_pool_rele(dp, FTAG); 5538 return (error); 5539 } 5540 5541 error = nvlist_lookup_string(innvl, "from", &fromname); 5542 if (error == 0) { 5543 if (strchr(fromname, '@') != NULL) { 5544 /* 5545 * If from is a snapshot, hold it and use the more 5546 * efficient dmu_send_estimate to estimate send space 5547 * size using deadlists. 5548 */ 5549 dsl_dataset_t *fromsnap; 5550 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap); 5551 if (error != 0) 5552 goto out; 5553 error = dmu_send_estimate(tosnap, fromsnap, &space); 5554 dsl_dataset_rele(fromsnap, FTAG); 5555 } else if (strchr(fromname, '#') != NULL) { 5556 /* 5557 * If from is a bookmark, fetch the creation TXG of the 5558 * snapshot it was created from and use that to find 5559 * blocks that were born after it. 5560 */ 5561 zfs_bookmark_phys_t frombm; 5562 5563 error = dsl_bookmark_lookup(dp, fromname, tosnap, 5564 &frombm); 5565 if (error != 0) 5566 goto out; 5567 error = dmu_send_estimate_from_txg(tosnap, 5568 frombm.zbm_creation_txg, &space); 5569 } else { 5570 /* 5571 * from is not properly formatted as a snapshot or 5572 * bookmark 5573 */ 5574 error = SET_ERROR(EINVAL); 5575 goto out; 5576 } 5577 } else { 5578 // If estimating the size of a full send, use dmu_send_estimate 5579 error = dmu_send_estimate(tosnap, NULL, &space); 5580 } 5581 5582 fnvlist_add_uint64(outnvl, "space", space); 5583 5584 out: 5585 dsl_dataset_rele(tosnap, FTAG); 5586 dsl_pool_rele(dp, FTAG); 5587 return (error); 5588 } 5589 5590 static int 5591 zfs_ioc_set_zev_callbacks(const char *unused, nvlist_t *innvl, 5592 nvlist_t *outnvl) 5593 { 5594 int error; 5595 uint64_t cb_addr; 5596 /* 5597 * Our secpolicy for this op makes sure it's called in 5598 * kernel context, and that no other callbacks have 5599 * been registered, yet. 5600 */ 5601 error = nvlist_lookup_uint64(innvl, "callbacks", &cb_addr); 5602 if (error != 0) { 5603 cmn_err(CE_WARN, "set_zev_callbacks nvlist lookup failed (%d)", 5604 error); 5605 return (error); 5606 } 5607 /* cb_addr is always a kernel memory address */ 5608 rw_enter(&rz_zev_rwlock, RW_WRITER); 5609 if (rz_zev_callbacks != rz_zev_default_callbacks) { 5610 rw_exit(&rz_zev_rwlock); 5611 return (EBUSY); 5612 } 5613 rz_zev_callbacks = (void *)(uintptr_t)cb_addr; 5614 rw_exit(&rz_zev_rwlock); 5615 return (0); 5616 } 5617 5618 static int 5619 zfs_ioc_unset_zev_callbacks(const char *unused, nvlist_t *innvl, 5620 nvlist_t *outnvl) 5621 { 5622 /* 5623 * Our secpolicy for this op makes sure it's called in 5624 * kernel context. 5625 */ 5626 rw_enter(&rz_zev_rwlock, RW_WRITER); 5627 rz_zev_callbacks = rz_zev_default_callbacks; 5628 rw_exit(&rz_zev_rwlock); 5629 /* after mutex release, no thread is using the old table anymore. */ 5630 return (0); 5631 } 5632 5633 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST]; 5634 5635 static void 5636 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5637 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5638 boolean_t log_history, zfs_ioc_poolcheck_t pool_check) 5639 { 5640 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5641 5642 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5643 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5644 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5645 ASSERT3P(vec->zvec_func, ==, NULL); 5646 5647 vec->zvec_legacy_func = func; 5648 vec->zvec_secpolicy = secpolicy; 5649 vec->zvec_namecheck = namecheck; 5650 vec->zvec_allow_log = log_history; 5651 vec->zvec_pool_check = pool_check; 5652 } 5653 5654 /* 5655 * See the block comment at the beginning of this file for details on 5656 * each argument to this function. 5657 */ 5658 static void 5659 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func, 5660 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5661 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist, 5662 boolean_t allow_log) 5663 { 5664 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5665 5666 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5667 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5668 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5669 ASSERT3P(vec->zvec_func, ==, NULL); 5670 5671 /* if we are logging, the name must be valid */ 5672 ASSERT(!allow_log || namecheck != NO_NAME); 5673 5674 vec->zvec_name = name; 5675 vec->zvec_func = func; 5676 vec->zvec_secpolicy = secpolicy; 5677 vec->zvec_namecheck = namecheck; 5678 vec->zvec_pool_check = pool_check; 5679 vec->zvec_smush_outnvlist = smush_outnvlist; 5680 vec->zvec_allow_log = allow_log; 5681 } 5682 5683 static void 5684 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5685 zfs_secpolicy_func_t *secpolicy, boolean_t log_history, 5686 zfs_ioc_poolcheck_t pool_check) 5687 { 5688 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5689 POOL_NAME, log_history, pool_check); 5690 } 5691 5692 static void 5693 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5694 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check) 5695 { 5696 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5697 DATASET_NAME, B_FALSE, pool_check); 5698 } 5699 5700 static void 5701 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5702 { 5703 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config, 5704 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5705 } 5706 5707 static void 5708 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5709 zfs_secpolicy_func_t *secpolicy) 5710 { 5711 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5712 NO_NAME, B_FALSE, POOL_CHECK_NONE); 5713 } 5714 5715 static void 5716 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc, 5717 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy) 5718 { 5719 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5720 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED); 5721 } 5722 5723 static void 5724 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5725 { 5726 zfs_ioctl_register_dataset_read_secpolicy(ioc, func, 5727 zfs_secpolicy_read); 5728 } 5729 5730 static void 5731 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5732 zfs_secpolicy_func_t *secpolicy) 5733 { 5734 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5735 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5736 } 5737 5738 static void 5739 zfs_ioctl_init(void) 5740 { 5741 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT, 5742 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME, 5743 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5744 5745 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY, 5746 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME, 5747 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE); 5748 5749 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS, 5750 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME, 5751 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5752 5753 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW, 5754 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME, 5755 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5756 5757 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE, 5758 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME, 5759 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5760 5761 zfs_ioctl_register("create", ZFS_IOC_CREATE, 5762 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME, 5763 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5764 5765 zfs_ioctl_register("clone", ZFS_IOC_CLONE, 5766 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME, 5767 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5768 5769 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS, 5770 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME, 5771 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5772 5773 zfs_ioctl_register("hold", ZFS_IOC_HOLD, 5774 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME, 5775 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5776 zfs_ioctl_register("release", ZFS_IOC_RELEASE, 5777 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME, 5778 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5779 5780 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS, 5781 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, 5782 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5783 5784 zfs_ioctl_register("set_zev_callbacks", ZFS_IOC_SET_ZEV_CALLBACKS, 5785 zfs_ioc_set_zev_callbacks, zfs_secpolicy_set_zev_callbacks, NO_NAME, 5786 POOL_CHECK_NONE, B_TRUE, B_FALSE); 5787 5788 zfs_ioctl_register("unset_zev_callbacks", ZFS_IOC_UNSET_ZEV_CALLBACKS, 5789 zfs_ioc_unset_zev_callbacks, zfs_secpolicy_unset_zev_callbacks, 5790 NO_NAME, POOL_CHECK_NONE, B_TRUE, B_FALSE); 5791 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK, 5792 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, 5793 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE); 5794 5795 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK, 5796 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME, 5797 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5798 5799 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS, 5800 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME, 5801 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5802 5803 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS, 5804 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks, 5805 POOL_NAME, 5806 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5807 5808 /* IOCTLS that use the legacy function signature */ 5809 5810 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze, 5811 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY); 5812 5813 zfs_ioctl_register_legacy(ZFS_IOC_ARC_INFO, zfs_ioc_arc_info, 5814 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_NONE); 5815 5816 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create, 5817 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5818 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN, 5819 zfs_ioc_pool_scan); 5820 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE, 5821 zfs_ioc_pool_upgrade); 5822 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD, 5823 zfs_ioc_vdev_add); 5824 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE, 5825 zfs_ioc_vdev_remove); 5826 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE, 5827 zfs_ioc_vdev_set_state); 5828 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH, 5829 zfs_ioc_vdev_attach); 5830 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH, 5831 zfs_ioc_vdev_detach); 5832 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH, 5833 zfs_ioc_vdev_setpath); 5834 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU, 5835 zfs_ioc_vdev_setfru); 5836 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS, 5837 zfs_ioc_pool_set_props); 5838 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT, 5839 zfs_ioc_vdev_split); 5840 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID, 5841 zfs_ioc_pool_reguid); 5842 5843 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS, 5844 zfs_ioc_pool_configs, zfs_secpolicy_none); 5845 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT, 5846 zfs_ioc_pool_tryimport, zfs_secpolicy_config); 5847 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT, 5848 zfs_ioc_inject_fault, zfs_secpolicy_inject); 5849 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT, 5850 zfs_ioc_clear_fault, zfs_secpolicy_inject); 5851 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT, 5852 zfs_ioc_inject_list_next, zfs_secpolicy_inject); 5853 5854 /* 5855 * pool destroy, and export don't log the history as part of 5856 * zfsdev_ioctl, but rather zfs_ioc_pool_export 5857 * does the logging of those commands. 5858 */ 5859 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy, 5860 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5861 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export, 5862 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5863 5864 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats, 5865 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5866 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props, 5867 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5868 5869 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log, 5870 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED); 5871 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME, 5872 zfs_ioc_dsobj_to_dsname, 5873 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED); 5874 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY, 5875 zfs_ioc_pool_get_history, 5876 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED); 5877 5878 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import, 5879 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5880 5881 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear, 5882 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5883 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen, 5884 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED); 5885 5886 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN, 5887 zfs_ioc_space_written); 5888 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS, 5889 zfs_ioc_objset_recvd_props); 5890 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ, 5891 zfs_ioc_next_obj); 5892 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL, 5893 zfs_ioc_get_fsacl); 5894 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS, 5895 zfs_ioc_objset_stats); 5896 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS, 5897 zfs_ioc_objset_zplprops); 5898 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT, 5899 zfs_ioc_dataset_list_next); 5900 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT, 5901 zfs_ioc_snapshot_list_next); 5902 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS, 5903 zfs_ioc_send_progress); 5904 5905 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF, 5906 zfs_ioc_diff, zfs_secpolicy_diff); 5907 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS, 5908 zfs_ioc_obj_to_stats, zfs_secpolicy_diff); 5909 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH, 5910 zfs_ioc_obj_to_path, zfs_secpolicy_diff); 5911 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE, 5912 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one); 5913 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY, 5914 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many); 5915 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND, 5916 zfs_ioc_send, zfs_secpolicy_send); 5917 5918 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop, 5919 zfs_secpolicy_none); 5920 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy, 5921 zfs_secpolicy_destroy); 5922 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename, 5923 zfs_secpolicy_rename); 5924 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv, 5925 zfs_secpolicy_recv); 5926 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote, 5927 zfs_secpolicy_promote); 5928 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP, 5929 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop); 5930 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl, 5931 zfs_secpolicy_set_fsacl); 5932 5933 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share, 5934 zfs_secpolicy_share, POOL_CHECK_NONE); 5935 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl, 5936 zfs_secpolicy_smb_acl, POOL_CHECK_NONE); 5937 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE, 5938 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 5939 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5940 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT, 5941 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, 5942 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5943 } 5944 5945 int 5946 pool_status_check(const char *name, zfs_ioc_namecheck_t type, 5947 zfs_ioc_poolcheck_t check) 5948 { 5949 spa_t *spa; 5950 int error; 5951 5952 ASSERT(type == POOL_NAME || type == DATASET_NAME); 5953 5954 if (check & POOL_CHECK_NONE) 5955 return (0); 5956 5957 error = spa_open(name, &spa, FTAG); 5958 if (error == 0) { 5959 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa)) 5960 error = SET_ERROR(EAGAIN); 5961 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa)) 5962 error = SET_ERROR(EROFS); 5963 spa_close(spa, FTAG); 5964 } 5965 return (error); 5966 } 5967 5968 /* 5969 * Find a free minor number. 5970 */ 5971 minor_t 5972 zfsdev_minor_alloc(void) 5973 { 5974 static minor_t last_minor; 5975 minor_t m; 5976 5977 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5978 5979 for (m = last_minor + 1; m != last_minor; m++) { 5980 if (m > ZFSDEV_MAX_MINOR) 5981 m = 1; 5982 if (ddi_get_soft_state(zfsdev_state, m) == NULL) { 5983 last_minor = m; 5984 return (m); 5985 } 5986 } 5987 5988 return (0); 5989 } 5990 5991 static int 5992 zfs_ctldev_init(dev_t *devp) 5993 { 5994 minor_t minor; 5995 zfs_soft_state_t *zs; 5996 5997 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5998 ASSERT(getminor(*devp) == 0); 5999 6000 minor = zfsdev_minor_alloc(); 6001 if (minor == 0) 6002 return (SET_ERROR(ENXIO)); 6003 6004 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) 6005 return (SET_ERROR(EAGAIN)); 6006 6007 *devp = makedevice(getemajor(*devp), minor); 6008 6009 zs = ddi_get_soft_state(zfsdev_state, minor); 6010 zs->zss_type = ZSST_CTLDEV; 6011 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data); 6012 6013 return (0); 6014 } 6015 6016 static void 6017 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor) 6018 { 6019 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 6020 6021 zfs_onexit_destroy(zo); 6022 ddi_soft_state_free(zfsdev_state, minor); 6023 } 6024 6025 void * 6026 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which) 6027 { 6028 zfs_soft_state_t *zp; 6029 6030 zp = ddi_get_soft_state(zfsdev_state, minor); 6031 if (zp == NULL || zp->zss_type != which) 6032 return (NULL); 6033 6034 return (zp->zss_data); 6035 } 6036 6037 static int 6038 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr) 6039 { 6040 int error = 0; 6041 6042 if (getminor(*devp) != 0) 6043 return (zvol_open(devp, flag, otyp, cr)); 6044 6045 /* This is the control device. Allocate a new minor if requested. */ 6046 if (flag & FEXCL) { 6047 mutex_enter(&zfsdev_state_lock); 6048 error = zfs_ctldev_init(devp); 6049 mutex_exit(&zfsdev_state_lock); 6050 } 6051 6052 return (error); 6053 } 6054 6055 static int 6056 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr) 6057 { 6058 zfs_onexit_t *zo; 6059 minor_t minor = getminor(dev); 6060 6061 if (minor == 0) 6062 return (0); 6063 6064 mutex_enter(&zfsdev_state_lock); 6065 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV); 6066 if (zo == NULL) { 6067 mutex_exit(&zfsdev_state_lock); 6068 return (zvol_close(dev, flag, otyp, cr)); 6069 } 6070 zfs_ctldev_destroy(zo, minor); 6071 mutex_exit(&zfsdev_state_lock); 6072 6073 return (0); 6074 } 6075 6076 static int 6077 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 6078 { 6079 zfs_cmd_t *zc; 6080 uint_t vecnum; 6081 int error, rc, len; 6082 minor_t minor = getminor(dev); 6083 const zfs_ioc_vec_t *vec; 6084 char *saved_poolname = NULL; 6085 nvlist_t *innvl = NULL; 6086 6087 if (minor != 0 && 6088 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL) 6089 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 6090 6091 vecnum = cmd - ZFS_IOC_FIRST; 6092 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 6093 6094 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 6095 return (SET_ERROR(EINVAL)); 6096 vec = &zfs_ioc_vec[vecnum]; 6097 6098 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 6099 6100 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 6101 if (error != 0) { 6102 error = SET_ERROR(EFAULT); 6103 goto out; 6104 } 6105 6106 zc->zc_iflags = flag & FKIOCTL; 6107 if (zc->zc_nvlist_src_size != 0) { 6108 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 6109 zc->zc_iflags, &innvl); 6110 if (error != 0) 6111 goto out; 6112 } 6113 6114 /* 6115 * Ensure that all pool/dataset names are valid before we pass down to 6116 * the lower layers. 6117 */ 6118 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 6119 switch (vec->zvec_namecheck) { 6120 case POOL_NAME: 6121 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 6122 error = SET_ERROR(EINVAL); 6123 else 6124 error = pool_status_check(zc->zc_name, 6125 vec->zvec_namecheck, vec->zvec_pool_check); 6126 break; 6127 6128 case DATASET_NAME: 6129 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0 || 6130 strchr(zc->zc_name, '#') != NULL) 6131 error = SET_ERROR(EINVAL); 6132 else 6133 error = pool_status_check(zc->zc_name, 6134 vec->zvec_namecheck, vec->zvec_pool_check); 6135 break; 6136 6137 case NO_NAME: 6138 break; 6139 } 6140 6141 6142 if (error == 0 && !(flag & FKIOCTL)) 6143 error = vec->zvec_secpolicy(zc, innvl, cr); 6144 6145 if (error != 0) 6146 goto out; 6147 6148 /* legacy ioctls can modify zc_name */ 6149 len = strcspn(zc->zc_name, "/@#") + 1; 6150 saved_poolname = kmem_alloc(len, KM_SLEEP); 6151 (void) strlcpy(saved_poolname, zc->zc_name, len); 6152 6153 if (vec->zvec_func != NULL) { 6154 nvlist_t *outnvl; 6155 int puterror = 0; 6156 spa_t *spa; 6157 nvlist_t *lognv = NULL; 6158 6159 ASSERT(vec->zvec_legacy_func == NULL); 6160 6161 /* 6162 * Add the innvl to the lognv before calling the func, 6163 * in case the func changes the innvl. 6164 */ 6165 if (vec->zvec_allow_log) { 6166 lognv = fnvlist_alloc(); 6167 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL, 6168 vec->zvec_name); 6169 if (!nvlist_empty(innvl)) { 6170 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL, 6171 innvl); 6172 } 6173 } 6174 6175 outnvl = fnvlist_alloc(); 6176 error = vec->zvec_func(zc->zc_name, innvl, outnvl); 6177 6178 if (error == 0 && vec->zvec_allow_log && 6179 spa_open(zc->zc_name, &spa, FTAG) == 0) { 6180 if (!nvlist_empty(outnvl)) { 6181 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL, 6182 outnvl); 6183 } 6184 (void) spa_history_log_nvl(spa, lognv); 6185 spa_close(spa, FTAG); 6186 } 6187 fnvlist_free(lognv); 6188 6189 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) { 6190 int smusherror = 0; 6191 if (vec->zvec_smush_outnvlist) { 6192 smusherror = nvlist_smush(outnvl, 6193 zc->zc_nvlist_dst_size); 6194 } 6195 if (smusherror == 0) 6196 puterror = put_nvlist(zc, outnvl); 6197 } 6198 6199 if (puterror != 0) 6200 error = puterror; 6201 6202 nvlist_free(outnvl); 6203 } else { 6204 error = vec->zvec_legacy_func(zc); 6205 } 6206 6207 out: 6208 nvlist_free(innvl); 6209 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 6210 if (error == 0 && rc != 0) 6211 error = SET_ERROR(EFAULT); 6212 if (error == 0 && vec->zvec_allow_log) { 6213 char *s = tsd_get(zfs_allow_log_key); 6214 if (s != NULL) 6215 strfree(s); 6216 (void) tsd_set(zfs_allow_log_key, saved_poolname); 6217 } else { 6218 if (saved_poolname != NULL) 6219 strfree(saved_poolname); 6220 } 6221 6222 kmem_free(zc, sizeof (zfs_cmd_t)); 6223 return (error); 6224 } 6225 6226 static int 6227 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 6228 { 6229 if (cmd != DDI_ATTACH) 6230 return (DDI_FAILURE); 6231 6232 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 6233 DDI_PSEUDO, 0) == DDI_FAILURE) 6234 return (DDI_FAILURE); 6235 6236 zfs_dip = dip; 6237 6238 ddi_report_dev(dip); 6239 6240 return (DDI_SUCCESS); 6241 } 6242 6243 static int 6244 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 6245 { 6246 if (spa_busy() || zfs_busy() || zvol_busy()) 6247 return (DDI_FAILURE); 6248 6249 if (cmd != DDI_DETACH) 6250 return (DDI_FAILURE); 6251 6252 zfs_dip = NULL; 6253 6254 ddi_prop_remove_all(dip); 6255 ddi_remove_minor_node(dip, NULL); 6256 6257 return (DDI_SUCCESS); 6258 } 6259 6260 /*ARGSUSED*/ 6261 static int 6262 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 6263 { 6264 switch (infocmd) { 6265 case DDI_INFO_DEVT2DEVINFO: 6266 *result = zfs_dip; 6267 return (DDI_SUCCESS); 6268 6269 case DDI_INFO_DEVT2INSTANCE: 6270 *result = (void *)0; 6271 return (DDI_SUCCESS); 6272 } 6273 6274 return (DDI_FAILURE); 6275 } 6276 6277 /* 6278 * OK, so this is a little weird. 6279 * 6280 * /dev/zfs is the control node, i.e. minor 0. 6281 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 6282 * 6283 * /dev/zfs has basically nothing to do except serve up ioctls, 6284 * so most of the standard driver entry points are in zvol.c. 6285 */ 6286 static struct cb_ops zfs_cb_ops = { 6287 zfsdev_open, /* open */ 6288 zfsdev_close, /* close */ 6289 zvol_strategy, /* strategy */ 6290 nodev, /* print */ 6291 zvol_dump, /* dump */ 6292 zvol_read, /* read */ 6293 zvol_write, /* write */ 6294 zfsdev_ioctl, /* ioctl */ 6295 nodev, /* devmap */ 6296 nodev, /* mmap */ 6297 nodev, /* segmap */ 6298 nochpoll, /* poll */ 6299 ddi_prop_op, /* prop_op */ 6300 NULL, /* streamtab */ 6301 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 6302 CB_REV, /* version */ 6303 nodev, /* async read */ 6304 nodev, /* async write */ 6305 }; 6306 6307 static struct dev_ops zfs_dev_ops = { 6308 DEVO_REV, /* version */ 6309 0, /* refcnt */ 6310 zfs_info, /* info */ 6311 nulldev, /* identify */ 6312 nulldev, /* probe */ 6313 zfs_attach, /* attach */ 6314 zfs_detach, /* detach */ 6315 nodev, /* reset */ 6316 &zfs_cb_ops, /* driver operations */ 6317 NULL, /* no bus operations */ 6318 NULL, /* power */ 6319 ddi_quiesce_not_needed, /* quiesce */ 6320 }; 6321 6322 static struct modldrv zfs_modldrv = { 6323 &mod_driverops, 6324 "ZFS storage pool", 6325 &zfs_dev_ops 6326 }; 6327 6328 static struct modlinkage modlinkage = { 6329 MODREV_1, 6330 (void *)&zfs_modlfs, 6331 (void *)&zfs_modldrv, 6332 NULL 6333 }; 6334 6335 static void 6336 zfs_allow_log_destroy(void *arg) 6337 { 6338 char *poolname = arg; 6339 strfree(poolname); 6340 } 6341 6342 int 6343 _init(void) 6344 { 6345 int error; 6346 6347 spa_init(FREAD | FWRITE); 6348 zfs_init(); 6349 zvol_init(); 6350 zfs_ioctl_init(); 6351 rz_zev_init(); 6352 6353 if ((error = mod_install(&modlinkage)) != 0) { 6354 zvol_fini(); 6355 zfs_fini(); 6356 spa_fini(); 6357 return (error); 6358 } 6359 6360 tsd_create(&zfs_fsyncer_key, NULL); 6361 tsd_create(&rrw_tsd_key, rrw_tsd_destroy); 6362 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy); 6363 6364 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 6365 ASSERT(error == 0); 6366 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 6367 6368 return (0); 6369 } 6370 6371 int 6372 _fini(void) 6373 { 6374 int error; 6375 6376 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 6377 return (SET_ERROR(EBUSY)); 6378 6379 if ((error = mod_remove(&modlinkage)) != 0) 6380 return (error); 6381 6382 rz_zev_fini(); 6383 zvol_fini(); 6384 zfs_fini(); 6385 spa_fini(); 6386 if (zfs_nfsshare_inited) 6387 (void) ddi_modclose(nfs_mod); 6388 if (zfs_smbshare_inited) 6389 (void) ddi_modclose(smbsrv_mod); 6390 if (zfs_nfsshare_inited || zfs_smbshare_inited) 6391 (void) ddi_modclose(sharefs_mod); 6392 6393 tsd_destroy(&zfs_fsyncer_key); 6394 ldi_ident_release(zfs_li); 6395 zfs_li = NULL; 6396 mutex_destroy(&zfs_share_lock); 6397 6398 return (error); 6399 } 6400 6401 int 6402 _info(struct modinfo *modinfop) 6403 { 6404 return (mod_info(&modlinkage, modinfop)); 6405 } 6406