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