1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Portions Copyright 2011 Martin Matuska 25 * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved. 26 * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 27 * Copyright (c) 2014, Joyent, Inc. All rights reserved. 28 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 29 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 30 * Copyright (c) 2013 Steven Hartland. All rights reserved. 31 * Copyright (c) 2014 Integros [integros.com] 32 */ 33 34 /* 35 * ZFS ioctls. 36 * 37 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage 38 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool. 39 * 40 * There are two ways that we handle ioctls: the legacy way where almost 41 * all of the logic is in the ioctl callback, and the new way where most 42 * of the marshalling is handled in the common entry point, zfsdev_ioctl(). 43 * 44 * Non-legacy ioctls should be registered by calling 45 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked 46 * from userland by lzc_ioctl(). 47 * 48 * The registration arguments are as follows: 49 * 50 * const char *name 51 * The name of the ioctl. This is used for history logging. If the 52 * ioctl returns successfully (the callback returns 0), and allow_log 53 * is true, then a history log entry will be recorded with the input & 54 * output nvlists. The log entry can be printed with "zpool history -i". 55 * 56 * zfs_ioc_t ioc 57 * The ioctl request number, which userland will pass to ioctl(2). 58 * The ioctl numbers can change from release to release, because 59 * the caller (libzfs) must be matched to the kernel. 60 * 61 * zfs_secpolicy_func_t *secpolicy 62 * This function will be called before the zfs_ioc_func_t, to 63 * determine if this operation is permitted. It should return EPERM 64 * on failure, and 0 on success. Checks include determining if the 65 * dataset is visible in this zone, and if the user has either all 66 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission 67 * to do this operation on this dataset with "zfs allow". 68 * 69 * zfs_ioc_namecheck_t namecheck 70 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool 71 * name, a dataset name, or nothing. If the name is not well-formed, 72 * the ioctl will fail and the callback will not be called. 73 * Therefore, the callback can assume that the name is well-formed 74 * (e.g. is null-terminated, doesn't have more than one '@' character, 75 * doesn't have invalid characters). 76 * 77 * zfs_ioc_poolcheck_t pool_check 78 * This specifies requirements on the pool state. If the pool does 79 * not meet them (is suspended or is readonly), the ioctl will fail 80 * and the callback will not be called. If any checks are specified 81 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME. 82 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED | 83 * POOL_CHECK_READONLY). 84 * 85 * boolean_t smush_outnvlist 86 * If smush_outnvlist is true, then the output is presumed to be a 87 * list of errors, and it will be "smushed" down to fit into the 88 * caller's buffer, by removing some entries and replacing them with a 89 * single "N_MORE_ERRORS" entry indicating how many were removed. See 90 * nvlist_smush() for details. If smush_outnvlist is false, and the 91 * outnvlist does not fit into the userland-provided buffer, then the 92 * ioctl will fail with ENOMEM. 93 * 94 * zfs_ioc_func_t *func 95 * The callback function that will perform the operation. 96 * 97 * The callback should return 0 on success, or an error number on 98 * failure. If the function fails, the userland ioctl will return -1, 99 * and errno will be set to the callback's return value. The callback 100 * will be called with the following arguments: 101 * 102 * const char *name 103 * The name of the pool or dataset to operate on, from 104 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the 105 * expected type (pool, dataset, or none). 106 * 107 * nvlist_t *innvl 108 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or 109 * NULL if no input nvlist was provided. Changes to this nvlist are 110 * ignored. If the input nvlist could not be deserialized, the 111 * ioctl will fail and the callback will not be called. 112 * 113 * nvlist_t *outnvl 114 * The output nvlist, initially empty. The callback can fill it in, 115 * and it will be returned to userland by serializing it into 116 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization 117 * fails (e.g. because the caller didn't supply a large enough 118 * buffer), then the overall ioctl will fail. See the 119 * 'smush_nvlist' argument above for additional behaviors. 120 * 121 * There are two typical uses of the output nvlist: 122 * - To return state, e.g. property values. In this case, 123 * smush_outnvlist should be false. If the buffer was not large 124 * enough, the caller will reallocate a larger buffer and try 125 * the ioctl again. 126 * 127 * - To return multiple errors from an ioctl which makes on-disk 128 * changes. In this case, smush_outnvlist should be true. 129 * Ioctls which make on-disk modifications should generally not 130 * use the outnvl if they succeed, because the caller can not 131 * distinguish between the operation failing, and 132 * deserialization failing. 133 */ 134 135 #include <sys/types.h> 136 #include <sys/param.h> 137 #include <sys/errno.h> 138 #include <sys/uio.h> 139 #include <sys/buf.h> 140 #include <sys/modctl.h> 141 #include <sys/open.h> 142 #include <sys/file.h> 143 #include <sys/kmem.h> 144 #include <sys/conf.h> 145 #include <sys/cmn_err.h> 146 #include <sys/stat.h> 147 #include <sys/zfs_ioctl.h> 148 #include <sys/zfs_vfsops.h> 149 #include <sys/zfs_znode.h> 150 #include <sys/zap.h> 151 #include <sys/spa.h> 152 #include <sys/spa_impl.h> 153 #include <sys/vdev.h> 154 #include <sys/priv_impl.h> 155 #include <sys/dmu.h> 156 #include <sys/dsl_dir.h> 157 #include <sys/dsl_dataset.h> 158 #include <sys/dsl_prop.h> 159 #include <sys/dsl_deleg.h> 160 #include <sys/dmu_objset.h> 161 #include <sys/dmu_impl.h> 162 #include <sys/dmu_tx.h> 163 #include <sys/ddi.h> 164 #include <sys/sunddi.h> 165 #include <sys/sunldi.h> 166 #include <sys/policy.h> 167 #include <sys/zone.h> 168 #include <sys/nvpair.h> 169 #include <sys/pathname.h> 170 #include <sys/mount.h> 171 #include <sys/sdt.h> 172 #include <sys/fs/zfs.h> 173 #include <sys/zfs_ctldir.h> 174 #include <sys/zfs_dir.h> 175 #include <sys/zfs_onexit.h> 176 #include <sys/zvol.h> 177 #include <sys/dsl_scan.h> 178 #include <sharefs/share.h> 179 #include <sys/dmu_objset.h> 180 #include <sys/dmu_send.h> 181 #include <sys/dsl_destroy.h> 182 #include <sys/dsl_bookmark.h> 183 #include <sys/dsl_userhold.h> 184 #include <sys/zfeature.h> 185 #include <sys/zio_checksum.h> 186 #include <sys/zfs_events.h> 187 188 #include "zfs_namecheck.h" 189 #include "zfs_prop.h" 190 #include "zfs_deleg.h" 191 #include "zfs_comutil.h" 192 193 extern struct modlfs zfs_modlfs; 194 195 extern void zfs_init(void); 196 extern void zfs_fini(void); 197 198 ldi_ident_t zfs_li = NULL; 199 dev_info_t *zfs_dip; 200 201 uint_t zfs_fsyncer_key; 202 extern uint_t rrw_tsd_key; 203 static uint_t zfs_allow_log_key; 204 205 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *); 206 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *); 207 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *); 208 209 typedef enum { 210 NO_NAME, 211 POOL_NAME, 212 DATASET_NAME 213 } zfs_ioc_namecheck_t; 214 215 typedef enum { 216 POOL_CHECK_NONE = 1 << 0, 217 POOL_CHECK_SUSPENDED = 1 << 1, 218 POOL_CHECK_READONLY = 1 << 2, 219 } zfs_ioc_poolcheck_t; 220 221 typedef struct zfs_ioc_vec { 222 zfs_ioc_legacy_func_t *zvec_legacy_func; 223 zfs_ioc_func_t *zvec_func; 224 zfs_secpolicy_func_t *zvec_secpolicy; 225 zfs_ioc_namecheck_t zvec_namecheck; 226 boolean_t zvec_allow_log; 227 zfs_ioc_poolcheck_t zvec_pool_check; 228 boolean_t zvec_smush_outnvlist; 229 const char *zvec_name; 230 } zfs_ioc_vec_t; 231 232 /* This array is indexed by zfs_userquota_prop_t */ 233 static const char *userquota_perms[] = { 234 ZFS_DELEG_PERM_USERUSED, 235 ZFS_DELEG_PERM_USERQUOTA, 236 ZFS_DELEG_PERM_GROUPUSED, 237 ZFS_DELEG_PERM_GROUPQUOTA, 238 }; 239 240 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc); 241 static int zfs_check_settable(const char *name, nvpair_t *property, 242 cred_t *cr); 243 static int zfs_check_clearable(char *dataset, nvlist_t *props, 244 nvlist_t **errors); 245 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *, 246 boolean_t *); 247 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *); 248 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp); 249 250 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature); 251 252 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ 253 void 254 __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 255 { 256 const char *newfile; 257 char buf[512]; 258 va_list adx; 259 260 /* 261 * Get rid of annoying "../common/" prefix to filename. 262 */ 263 newfile = strrchr(file, '/'); 264 if (newfile != NULL) { 265 newfile = newfile + 1; /* Get rid of leading / */ 266 } else { 267 newfile = file; 268 } 269 270 va_start(adx, fmt); 271 (void) vsnprintf(buf, sizeof (buf), fmt, adx); 272 va_end(adx); 273 274 /* 275 * To get this data, use the zfs-dprintf probe as so: 276 * dtrace -q -n 'zfs-dprintf \ 277 * /stringof(arg0) == "dbuf.c"/ \ 278 * {printf("%s: %s", stringof(arg1), stringof(arg3))}' 279 * arg0 = file name 280 * arg1 = function name 281 * arg2 = line number 282 * arg3 = message 283 */ 284 DTRACE_PROBE4(zfs__dprintf, 285 char *, newfile, char *, func, int, line, char *, buf); 286 } 287 288 static void 289 history_str_free(char *buf) 290 { 291 kmem_free(buf, HIS_MAX_RECORD_LEN); 292 } 293 294 static char * 295 history_str_get(zfs_cmd_t *zc) 296 { 297 char *buf; 298 299 if (zc->zc_history == NULL) 300 return (NULL); 301 302 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); 303 if (copyinstr((void *)(uintptr_t)zc->zc_history, 304 buf, HIS_MAX_RECORD_LEN, NULL) != 0) { 305 history_str_free(buf); 306 return (NULL); 307 } 308 309 buf[HIS_MAX_RECORD_LEN -1] = '\0'; 310 311 return (buf); 312 } 313 314 /* 315 * Check to see if the named dataset is currently defined as bootable 316 */ 317 static boolean_t 318 zfs_is_bootfs(const char *name) 319 { 320 objset_t *os; 321 322 if (dmu_objset_hold(name, FTAG, &os) == 0) { 323 boolean_t ret; 324 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os))); 325 dmu_objset_rele(os, FTAG); 326 return (ret); 327 } 328 return (B_FALSE); 329 } 330 331 /* 332 * Return non-zero if the spa version is less than requested version. 333 */ 334 static int 335 zfs_earlier_version(const char *name, int version) 336 { 337 spa_t *spa; 338 339 if (spa_open(name, &spa, FTAG) == 0) { 340 if (spa_version(spa) < version) { 341 spa_close(spa, FTAG); 342 return (1); 343 } 344 spa_close(spa, FTAG); 345 } 346 return (0); 347 } 348 349 /* 350 * Return TRUE if the ZPL version is less than requested version. 351 */ 352 static boolean_t 353 zpl_earlier_version(const char *name, int version) 354 { 355 objset_t *os; 356 boolean_t rc = B_TRUE; 357 358 if (dmu_objset_hold(name, FTAG, &os) == 0) { 359 uint64_t zplversion; 360 361 if (dmu_objset_type(os) != DMU_OST_ZFS) { 362 dmu_objset_rele(os, FTAG); 363 return (B_TRUE); 364 } 365 /* XXX reading from non-owned objset */ 366 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0) 367 rc = zplversion < version; 368 dmu_objset_rele(os, FTAG); 369 } 370 return (rc); 371 } 372 373 static void 374 zfs_log_history(zfs_cmd_t *zc) 375 { 376 spa_t *spa; 377 char *buf; 378 379 if ((buf = history_str_get(zc)) == NULL) 380 return; 381 382 if (spa_open(zc->zc_name, &spa, FTAG) == 0) { 383 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) 384 (void) spa_history_log(spa, buf); 385 spa_close(spa, FTAG); 386 } 387 history_str_free(buf); 388 } 389 390 /* 391 * Policy for top-level read operations (list pools). Requires no privileges, 392 * and can be used in the local zone, as there is no associated dataset. 393 */ 394 /* ARGSUSED */ 395 static int 396 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 397 { 398 return (0); 399 } 400 401 /* 402 * Policy for dataset read operations (list children, get statistics). Requires 403 * no privileges, but must be visible in the local zone. 404 */ 405 /* ARGSUSED */ 406 static int 407 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 408 { 409 if (INGLOBALZONE(curproc) || 410 zone_dataset_visible(zc->zc_name, NULL)) 411 return (0); 412 413 return (SET_ERROR(ENOENT)); 414 } 415 416 static int 417 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr) 418 { 419 int writable = 1; 420 421 /* 422 * The dataset must be visible by this zone -- check this first 423 * so they don't see EPERM on something they shouldn't know about. 424 */ 425 if (!INGLOBALZONE(curproc) && 426 !zone_dataset_visible(dataset, &writable)) 427 return (SET_ERROR(ENOENT)); 428 429 if (INGLOBALZONE(curproc)) { 430 /* 431 * If the fs is zoned, only root can access it from the 432 * global zone. 433 */ 434 if (secpolicy_zfs(cr) && zoned) 435 return (SET_ERROR(EPERM)); 436 } else { 437 /* 438 * If we are in a local zone, the 'zoned' property must be set. 439 */ 440 if (!zoned) 441 return (SET_ERROR(EPERM)); 442 443 /* must be writable by this zone */ 444 if (!writable) 445 return (SET_ERROR(EPERM)); 446 } 447 return (0); 448 } 449 450 static int 451 zfs_dozonecheck(const char *dataset, cred_t *cr) 452 { 453 uint64_t zoned; 454 455 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL)) 456 return (SET_ERROR(ENOENT)); 457 458 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 459 } 460 461 static int 462 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr) 463 { 464 uint64_t zoned; 465 466 if (dsl_prop_get_int_ds(ds, "zoned", &zoned)) 467 return (SET_ERROR(ENOENT)); 468 469 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 470 } 471 472 static int 473 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds, 474 const char *perm, cred_t *cr) 475 { 476 int error; 477 478 error = zfs_dozonecheck_ds(name, ds, cr); 479 if (error == 0) { 480 error = secpolicy_zfs(cr); 481 if (error != 0) 482 error = dsl_deleg_access_impl(ds, perm, cr); 483 } 484 return (error); 485 } 486 487 static int 488 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) 489 { 490 int error; 491 dsl_dataset_t *ds; 492 dsl_pool_t *dp; 493 494 error = dsl_pool_hold(name, FTAG, &dp); 495 if (error != 0) 496 return (error); 497 498 error = dsl_dataset_hold(dp, name, FTAG, &ds); 499 if (error != 0) { 500 dsl_pool_rele(dp, FTAG); 501 return (error); 502 } 503 504 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr); 505 506 dsl_dataset_rele(ds, FTAG); 507 dsl_pool_rele(dp, FTAG); 508 return (error); 509 } 510 511 /* 512 * Policy for setting the security label property. 513 * 514 * Returns 0 for success, non-zero for access and other errors. 515 */ 516 static int 517 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr) 518 { 519 char ds_hexsl[MAXNAMELEN]; 520 bslabel_t ds_sl, new_sl; 521 boolean_t new_default = FALSE; 522 uint64_t zoned; 523 int needed_priv = -1; 524 int error; 525 526 /* First get the existing dataset label. */ 527 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 528 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 529 if (error != 0) 530 return (SET_ERROR(EPERM)); 531 532 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 533 new_default = TRUE; 534 535 /* The label must be translatable */ 536 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0)) 537 return (SET_ERROR(EINVAL)); 538 539 /* 540 * In a non-global zone, disallow attempts to set a label that 541 * doesn't match that of the zone; otherwise no other checks 542 * are needed. 543 */ 544 if (!INGLOBALZONE(curproc)) { 545 if (new_default || !blequal(&new_sl, CR_SL(CRED()))) 546 return (SET_ERROR(EPERM)); 547 return (0); 548 } 549 550 /* 551 * For global-zone datasets (i.e., those whose zoned property is 552 * "off", verify that the specified new label is valid for the 553 * global zone. 554 */ 555 if (dsl_prop_get_integer(name, 556 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 557 return (SET_ERROR(EPERM)); 558 if (!zoned) { 559 if (zfs_check_global_label(name, strval) != 0) 560 return (SET_ERROR(EPERM)); 561 } 562 563 /* 564 * If the existing dataset label is nondefault, check if the 565 * dataset is mounted (label cannot be changed while mounted). 566 * Get the zfsvfs; if there isn't one, then the dataset isn't 567 * mounted (or isn't a dataset, doesn't exist, ...). 568 */ 569 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) { 570 objset_t *os; 571 static char *setsl_tag = "setsl_tag"; 572 573 /* 574 * Try to own the dataset; abort if there is any error, 575 * (e.g., already mounted, in use, or other error). 576 */ 577 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE, 578 setsl_tag, &os); 579 if (error != 0) 580 return (SET_ERROR(EPERM)); 581 582 dmu_objset_disown(os, setsl_tag); 583 584 if (new_default) { 585 needed_priv = PRIV_FILE_DOWNGRADE_SL; 586 goto out_check; 587 } 588 589 if (hexstr_to_label(strval, &new_sl) != 0) 590 return (SET_ERROR(EPERM)); 591 592 if (blstrictdom(&ds_sl, &new_sl)) 593 needed_priv = PRIV_FILE_DOWNGRADE_SL; 594 else if (blstrictdom(&new_sl, &ds_sl)) 595 needed_priv = PRIV_FILE_UPGRADE_SL; 596 } else { 597 /* dataset currently has a default label */ 598 if (!new_default) 599 needed_priv = PRIV_FILE_UPGRADE_SL; 600 } 601 602 out_check: 603 if (needed_priv != -1) 604 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL)); 605 return (0); 606 } 607 608 static int 609 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval, 610 cred_t *cr) 611 { 612 char *strval; 613 614 /* 615 * Check permissions for special properties. 616 */ 617 switch (prop) { 618 case ZFS_PROP_ZONED: 619 /* 620 * Disallow setting of 'zoned' from within a local zone. 621 */ 622 if (!INGLOBALZONE(curproc)) 623 return (SET_ERROR(EPERM)); 624 break; 625 626 case ZFS_PROP_QUOTA: 627 case ZFS_PROP_FILESYSTEM_LIMIT: 628 case ZFS_PROP_SNAPSHOT_LIMIT: 629 if (!INGLOBALZONE(curproc)) { 630 uint64_t zoned; 631 char setpoint[MAXNAMELEN]; 632 /* 633 * Unprivileged users are allowed to modify the 634 * limit on things *under* (ie. contained by) 635 * the thing they own. 636 */ 637 if (dsl_prop_get_integer(dsname, "zoned", &zoned, 638 setpoint)) 639 return (SET_ERROR(EPERM)); 640 if (!zoned || strlen(dsname) <= strlen(setpoint)) 641 return (SET_ERROR(EPERM)); 642 } 643 break; 644 645 case ZFS_PROP_MLSLABEL: 646 if (!is_system_labeled()) 647 return (SET_ERROR(EPERM)); 648 649 if (nvpair_value_string(propval, &strval) == 0) { 650 int err; 651 652 err = zfs_set_slabel_policy(dsname, strval, CRED()); 653 if (err != 0) 654 return (err); 655 } 656 break; 657 } 658 659 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr)); 660 } 661 662 /* ARGSUSED */ 663 static int 664 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 665 { 666 int error; 667 668 error = zfs_dozonecheck(zc->zc_name, cr); 669 if (error != 0) 670 return (error); 671 672 /* 673 * permission to set permissions will be evaluated later in 674 * dsl_deleg_can_allow() 675 */ 676 return (0); 677 } 678 679 /* ARGSUSED */ 680 static int 681 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 682 { 683 return (zfs_secpolicy_write_perms(zc->zc_name, 684 ZFS_DELEG_PERM_ROLLBACK, cr)); 685 } 686 687 /* ARGSUSED */ 688 static int 689 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 690 { 691 dsl_pool_t *dp; 692 dsl_dataset_t *ds; 693 char *cp; 694 int error; 695 696 /* 697 * Generate the current snapshot name from the given objsetid, then 698 * use that name for the secpolicy/zone checks. 699 */ 700 cp = strchr(zc->zc_name, '@'); 701 if (cp == NULL) 702 return (SET_ERROR(EINVAL)); 703 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 704 if (error != 0) 705 return (error); 706 707 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 708 if (error != 0) { 709 dsl_pool_rele(dp, FTAG); 710 return (error); 711 } 712 713 dsl_dataset_name(ds, zc->zc_name); 714 715 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds, 716 ZFS_DELEG_PERM_SEND, cr); 717 dsl_dataset_rele(ds, FTAG); 718 dsl_pool_rele(dp, FTAG); 719 720 return (error); 721 } 722 723 /* ARGSUSED */ 724 static int 725 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 726 { 727 return (zfs_secpolicy_write_perms(zc->zc_name, 728 ZFS_DELEG_PERM_SEND, cr)); 729 } 730 731 /* ARGSUSED */ 732 static int 733 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 734 { 735 vnode_t *vp; 736 int error; 737 738 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 739 NO_FOLLOW, NULL, &vp)) != 0) 740 return (error); 741 742 /* Now make sure mntpnt and dataset are ZFS */ 743 744 if (vp->v_vfsp->vfs_fstype != zfsfstype || 745 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 746 zc->zc_name) != 0)) { 747 VN_RELE(vp); 748 return (SET_ERROR(EPERM)); 749 } 750 751 VN_RELE(vp); 752 return (dsl_deleg_access(zc->zc_name, 753 ZFS_DELEG_PERM_SHARE, cr)); 754 } 755 756 int 757 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 758 { 759 if (!INGLOBALZONE(curproc)) 760 return (SET_ERROR(EPERM)); 761 762 if (secpolicy_nfs(cr) == 0) { 763 return (0); 764 } else { 765 return (zfs_secpolicy_deleg_share(zc, innvl, cr)); 766 } 767 } 768 769 int 770 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 771 { 772 if (!INGLOBALZONE(curproc)) 773 return (SET_ERROR(EPERM)); 774 775 if (secpolicy_smb(cr) == 0) { 776 return (0); 777 } else { 778 return (zfs_secpolicy_deleg_share(zc, innvl, cr)); 779 } 780 } 781 782 static int 783 zfs_get_parent(const char *datasetname, char *parent, int parentsize) 784 { 785 char *cp; 786 787 /* 788 * Remove the @bla or /bla from the end of the name to get the parent. 789 */ 790 (void) strncpy(parent, datasetname, parentsize); 791 cp = strrchr(parent, '@'); 792 if (cp != NULL) { 793 cp[0] = '\0'; 794 } else { 795 cp = strrchr(parent, '/'); 796 if (cp == NULL) 797 return (SET_ERROR(ENOENT)); 798 cp[0] = '\0'; 799 } 800 801 return (0); 802 } 803 804 int 805 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 806 { 807 int error; 808 809 if ((error = zfs_secpolicy_write_perms(name, 810 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 811 return (error); 812 813 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); 814 } 815 816 /* ARGSUSED */ 817 static int 818 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 819 { 820 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); 821 } 822 823 /* 824 * Destroying snapshots with delegated permissions requires 825 * descendant mount and destroy permissions. 826 */ 827 /* ARGSUSED */ 828 static int 829 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 830 { 831 nvlist_t *snaps; 832 nvpair_t *pair, *nextpair; 833 int error = 0; 834 835 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 836 return (SET_ERROR(EINVAL)); 837 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 838 pair = nextpair) { 839 nextpair = nvlist_next_nvpair(snaps, pair); 840 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr); 841 if (error == ENOENT) { 842 /* 843 * Ignore any snapshots that don't exist (we consider 844 * them "already destroyed"). Remove the name from the 845 * nvl here in case the snapshot is created between 846 * now and when we try to destroy it (in which case 847 * we don't want to destroy it since we haven't 848 * checked for permission). 849 */ 850 fnvlist_remove_nvpair(snaps, pair); 851 error = 0; 852 } 853 if (error != 0) 854 break; 855 } 856 857 return (error); 858 } 859 860 int 861 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 862 { 863 char parentname[MAXNAMELEN]; 864 int error; 865 866 if ((error = zfs_secpolicy_write_perms(from, 867 ZFS_DELEG_PERM_RENAME, cr)) != 0) 868 return (error); 869 870 if ((error = zfs_secpolicy_write_perms(from, 871 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 872 return (error); 873 874 if ((error = zfs_get_parent(to, parentname, 875 sizeof (parentname))) != 0) 876 return (error); 877 878 if ((error = zfs_secpolicy_write_perms(parentname, 879 ZFS_DELEG_PERM_CREATE, cr)) != 0) 880 return (error); 881 882 if ((error = zfs_secpolicy_write_perms(parentname, 883 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 884 return (error); 885 886 return (error); 887 } 888 889 /* ARGSUSED */ 890 static int 891 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 892 { 893 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); 894 } 895 896 /* ARGSUSED */ 897 static int 898 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 899 { 900 dsl_pool_t *dp; 901 dsl_dataset_t *clone; 902 int error; 903 904 error = zfs_secpolicy_write_perms(zc->zc_name, 905 ZFS_DELEG_PERM_PROMOTE, cr); 906 if (error != 0) 907 return (error); 908 909 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 910 if (error != 0) 911 return (error); 912 913 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone); 914 915 if (error == 0) { 916 char parentname[MAXNAMELEN]; 917 dsl_dataset_t *origin = NULL; 918 dsl_dir_t *dd; 919 dd = clone->ds_dir; 920 921 error = dsl_dataset_hold_obj(dd->dd_pool, 922 dsl_dir_phys(dd)->dd_origin_obj, FTAG, &origin); 923 if (error != 0) { 924 dsl_dataset_rele(clone, FTAG); 925 dsl_pool_rele(dp, FTAG); 926 return (error); 927 } 928 929 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone, 930 ZFS_DELEG_PERM_MOUNT, cr); 931 932 dsl_dataset_name(origin, parentname); 933 if (error == 0) { 934 error = zfs_secpolicy_write_perms_ds(parentname, origin, 935 ZFS_DELEG_PERM_PROMOTE, cr); 936 } 937 dsl_dataset_rele(clone, FTAG); 938 dsl_dataset_rele(origin, FTAG); 939 } 940 dsl_pool_rele(dp, FTAG); 941 return (error); 942 } 943 944 /* ARGSUSED */ 945 static int 946 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 947 { 948 int error; 949 950 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 951 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 952 return (error); 953 954 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 955 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 956 return (error); 957 958 return (zfs_secpolicy_write_perms(zc->zc_name, 959 ZFS_DELEG_PERM_CREATE, cr)); 960 } 961 962 int 963 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 964 { 965 return (zfs_secpolicy_write_perms(name, 966 ZFS_DELEG_PERM_SNAPSHOT, cr)); 967 } 968 969 /* 970 * Check for permission to create each snapshot in the nvlist. 971 */ 972 /* ARGSUSED */ 973 static int 974 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 975 { 976 nvlist_t *snaps; 977 int error = 0; 978 nvpair_t *pair; 979 980 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 981 return (SET_ERROR(EINVAL)); 982 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 983 pair = nvlist_next_nvpair(snaps, pair)) { 984 char *name = nvpair_name(pair); 985 char *atp = strchr(name, '@'); 986 987 if (atp == NULL) { 988 error = SET_ERROR(EINVAL); 989 break; 990 } 991 *atp = '\0'; 992 error = zfs_secpolicy_snapshot_perms(name, cr); 993 *atp = '@'; 994 if (error != 0) 995 break; 996 } 997 return (error); 998 } 999 1000 /* 1001 * Check for permission to create each snapshot in the nvlist. 1002 */ 1003 /* ARGSUSED */ 1004 static int 1005 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1006 { 1007 int error = 0; 1008 1009 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 1010 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 1011 char *name = nvpair_name(pair); 1012 char *hashp = strchr(name, '#'); 1013 1014 if (hashp == NULL) { 1015 error = SET_ERROR(EINVAL); 1016 break; 1017 } 1018 *hashp = '\0'; 1019 error = zfs_secpolicy_write_perms(name, 1020 ZFS_DELEG_PERM_BOOKMARK, cr); 1021 *hashp = '#'; 1022 if (error != 0) 1023 break; 1024 } 1025 return (error); 1026 } 1027 1028 /* ARGSUSED */ 1029 static int 1030 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1031 { 1032 nvpair_t *pair, *nextpair; 1033 int error = 0; 1034 1035 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; 1036 pair = nextpair) { 1037 char *name = nvpair_name(pair); 1038 char *hashp = strchr(name, '#'); 1039 nextpair = nvlist_next_nvpair(innvl, pair); 1040 1041 if (hashp == NULL) { 1042 error = SET_ERROR(EINVAL); 1043 break; 1044 } 1045 1046 *hashp = '\0'; 1047 error = zfs_secpolicy_write_perms(name, 1048 ZFS_DELEG_PERM_DESTROY, cr); 1049 *hashp = '#'; 1050 if (error == ENOENT) { 1051 /* 1052 * Ignore any filesystems that don't exist (we consider 1053 * their bookmarks "already destroyed"). Remove 1054 * the name from the nvl here in case the filesystem 1055 * is created between now and when we try to destroy 1056 * the bookmark (in which case we don't want to 1057 * destroy it since we haven't checked for permission). 1058 */ 1059 fnvlist_remove_nvpair(innvl, pair); 1060 error = 0; 1061 } 1062 if (error != 0) 1063 break; 1064 } 1065 1066 return (error); 1067 } 1068 1069 /* ARGSUSED */ 1070 static int 1071 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1072 { 1073 /* 1074 * Even root must have a proper TSD so that we know what pool 1075 * to log to. 1076 */ 1077 if (tsd_get(zfs_allow_log_key) == NULL) 1078 return (SET_ERROR(EPERM)); 1079 return (0); 1080 } 1081 1082 static int 1083 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1084 { 1085 char parentname[MAXNAMELEN]; 1086 int error; 1087 char *origin; 1088 1089 if ((error = zfs_get_parent(zc->zc_name, parentname, 1090 sizeof (parentname))) != 0) 1091 return (error); 1092 1093 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 && 1094 (error = zfs_secpolicy_write_perms(origin, 1095 ZFS_DELEG_PERM_CLONE, cr)) != 0) 1096 return (error); 1097 1098 if ((error = zfs_secpolicy_write_perms(parentname, 1099 ZFS_DELEG_PERM_CREATE, cr)) != 0) 1100 return (error); 1101 1102 return (zfs_secpolicy_write_perms(parentname, 1103 ZFS_DELEG_PERM_MOUNT, cr)); 1104 } 1105 1106 /* 1107 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 1108 * SYS_CONFIG privilege, which is not available in a local zone. 1109 */ 1110 /* ARGSUSED */ 1111 static int 1112 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1113 { 1114 if (secpolicy_sys_config(cr, B_FALSE) != 0) 1115 return (SET_ERROR(EPERM)); 1116 1117 return (0); 1118 } 1119 1120 /* 1121 * Policy for object to name lookups. 1122 */ 1123 /* ARGSUSED */ 1124 static int 1125 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1126 { 1127 int error; 1128 1129 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0) 1130 return (0); 1131 1132 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr); 1133 return (error); 1134 } 1135 1136 /* 1137 * Policy for fault injection. Requires all privileges. 1138 */ 1139 /* ARGSUSED */ 1140 static int 1141 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1142 { 1143 return (secpolicy_zinject(cr)); 1144 } 1145 1146 /* ARGSUSED */ 1147 static int 1148 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1149 { 1150 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 1151 1152 if (prop == ZPROP_INVAL) { 1153 if (!zfs_prop_user(zc->zc_value)) 1154 return (SET_ERROR(EINVAL)); 1155 return (zfs_secpolicy_write_perms(zc->zc_name, 1156 ZFS_DELEG_PERM_USERPROP, cr)); 1157 } else { 1158 return (zfs_secpolicy_setprop(zc->zc_name, prop, 1159 NULL, cr)); 1160 } 1161 } 1162 1163 static int 1164 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1165 { 1166 int err = zfs_secpolicy_read(zc, innvl, cr); 1167 if (err) 1168 return (err); 1169 1170 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 1171 return (SET_ERROR(EINVAL)); 1172 1173 if (zc->zc_value[0] == 0) { 1174 /* 1175 * They are asking about a posix uid/gid. If it's 1176 * themself, allow it. 1177 */ 1178 if (zc->zc_objset_type == ZFS_PROP_USERUSED || 1179 zc->zc_objset_type == ZFS_PROP_USERQUOTA) { 1180 if (zc->zc_guid == crgetuid(cr)) 1181 return (0); 1182 } else { 1183 if (groupmember(zc->zc_guid, cr)) 1184 return (0); 1185 } 1186 } 1187 1188 return (zfs_secpolicy_write_perms(zc->zc_name, 1189 userquota_perms[zc->zc_objset_type], cr)); 1190 } 1191 1192 static int 1193 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1194 { 1195 int err = zfs_secpolicy_read(zc, innvl, cr); 1196 if (err) 1197 return (err); 1198 1199 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 1200 return (SET_ERROR(EINVAL)); 1201 1202 return (zfs_secpolicy_write_perms(zc->zc_name, 1203 userquota_perms[zc->zc_objset_type], cr)); 1204 } 1205 1206 /* ARGSUSED */ 1207 static int 1208 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1209 { 1210 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, 1211 NULL, cr)); 1212 } 1213 1214 /* ARGSUSED */ 1215 static int 1216 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1217 { 1218 nvpair_t *pair; 1219 nvlist_t *holds; 1220 int error; 1221 1222 error = nvlist_lookup_nvlist(innvl, "holds", &holds); 1223 if (error != 0) 1224 return (SET_ERROR(EINVAL)); 1225 1226 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; 1227 pair = nvlist_next_nvpair(holds, pair)) { 1228 char fsname[MAXNAMELEN]; 1229 error = dmu_fsname(nvpair_name(pair), fsname); 1230 if (error != 0) 1231 return (error); 1232 error = zfs_secpolicy_write_perms(fsname, 1233 ZFS_DELEG_PERM_HOLD, cr); 1234 if (error != 0) 1235 return (error); 1236 } 1237 return (0); 1238 } 1239 1240 /* ARGSUSED */ 1241 static int 1242 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1243 { 1244 nvpair_t *pair; 1245 int error; 1246 1247 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; 1248 pair = nvlist_next_nvpair(innvl, pair)) { 1249 char fsname[MAXNAMELEN]; 1250 error = dmu_fsname(nvpair_name(pair), fsname); 1251 if (error != 0) 1252 return (error); 1253 error = zfs_secpolicy_write_perms(fsname, 1254 ZFS_DELEG_PERM_RELEASE, cr); 1255 if (error != 0) 1256 return (error); 1257 } 1258 return (0); 1259 } 1260 1261 /* 1262 * Policy for allowing temporary snapshots to be taken or released 1263 */ 1264 static int 1265 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1266 { 1267 /* 1268 * A temporary snapshot is the same as a snapshot, 1269 * hold, destroy and release all rolled into one. 1270 * Delegated diff alone is sufficient that we allow this. 1271 */ 1272 int error; 1273 1274 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 1275 ZFS_DELEG_PERM_DIFF, cr)) == 0) 1276 return (0); 1277 1278 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr); 1279 if (error == 0) 1280 error = zfs_secpolicy_hold(zc, innvl, cr); 1281 if (error == 0) 1282 error = zfs_secpolicy_release(zc, innvl, cr); 1283 if (error == 0) 1284 error = zfs_secpolicy_destroy(zc, innvl, cr); 1285 return (error); 1286 } 1287 1288 /* 1289 * Policy for allowing setting the zev callback list. 1290 */ 1291 static int 1292 zfs_secpolicy_set_zev_callbacks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1293 { 1294 /* must be called from kernel context */ 1295 if (!(zc->zc_iflags & FKIOCTL)) 1296 return (SET_ERROR(EPERM)); 1297 /* callback pointer must be unset (set to default value) */ 1298 rw_enter(&rz_zev_rwlock, RW_READER); 1299 if (rz_zev_callbacks != rz_zev_default_callbacks) { 1300 rw_exit(&rz_zev_rwlock); 1301 return (SET_ERROR(EBUSY)); 1302 } 1303 rw_exit(&rz_zev_rwlock); 1304 return (0); 1305 } 1306 1307 /* 1308 * Policy for allowing unsetting/resetting the zev callback list. 1309 */ 1310 static int 1311 zfs_secpolicy_unset_zev_callbacks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1312 { 1313 /* must be called from kernel context */ 1314 if (!(zc->zc_iflags & FKIOCTL)) 1315 return (SET_ERROR(EPERM)); 1316 return (0); 1317 } 1318 1319 /* 1320 * Returns the nvlist as specified by the user in the zfs_cmd_t. 1321 */ 1322 static int 1323 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) 1324 { 1325 char *packed; 1326 int error; 1327 nvlist_t *list = NULL; 1328 1329 /* 1330 * Read in and unpack the user-supplied nvlist. 1331 */ 1332 if (size == 0) 1333 return (SET_ERROR(EINVAL)); 1334 1335 packed = kmem_alloc(size, KM_SLEEP); 1336 1337 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, 1338 iflag)) != 0) { 1339 kmem_free(packed, size); 1340 return (SET_ERROR(EFAULT)); 1341 } 1342 1343 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 1344 kmem_free(packed, size); 1345 return (error); 1346 } 1347 1348 kmem_free(packed, size); 1349 1350 *nvp = list; 1351 return (0); 1352 } 1353 1354 /* 1355 * Reduce the size of this nvlist until it can be serialized in 'max' bytes. 1356 * Entries will be removed from the end of the nvlist, and one int32 entry 1357 * named "N_MORE_ERRORS" will be added indicating how many entries were 1358 * removed. 1359 */ 1360 static int 1361 nvlist_smush(nvlist_t *errors, size_t max) 1362 { 1363 size_t size; 1364 1365 size = fnvlist_size(errors); 1366 1367 if (size > max) { 1368 nvpair_t *more_errors; 1369 int n = 0; 1370 1371 if (max < 1024) 1372 return (SET_ERROR(ENOMEM)); 1373 1374 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0); 1375 more_errors = nvlist_prev_nvpair(errors, NULL); 1376 1377 do { 1378 nvpair_t *pair = nvlist_prev_nvpair(errors, 1379 more_errors); 1380 fnvlist_remove_nvpair(errors, pair); 1381 n++; 1382 size = fnvlist_size(errors); 1383 } while (size > max); 1384 1385 fnvlist_remove_nvpair(errors, more_errors); 1386 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n); 1387 ASSERT3U(fnvlist_size(errors), <=, max); 1388 } 1389 1390 return (0); 1391 } 1392 1393 static int 1394 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 1395 { 1396 char *packed = NULL; 1397 int error = 0; 1398 size_t size; 1399 1400 size = fnvlist_size(nvl); 1401 1402 if (size > zc->zc_nvlist_dst_size) { 1403 error = SET_ERROR(ENOMEM); 1404 } else { 1405 packed = fnvlist_pack(nvl, &size); 1406 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 1407 size, zc->zc_iflags) != 0) 1408 error = SET_ERROR(EFAULT); 1409 fnvlist_pack_free(packed, size); 1410 } 1411 1412 zc->zc_nvlist_dst_size = size; 1413 zc->zc_nvlist_dst_filled = B_TRUE; 1414 return (error); 1415 } 1416 1417 static int 1418 getzfsvfs(const char *dsname, zfsvfs_t **zfvp) 1419 { 1420 objset_t *os; 1421 int error; 1422 1423 error = dmu_objset_hold(dsname, FTAG, &os); 1424 if (error != 0) 1425 return (error); 1426 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1427 dmu_objset_rele(os, FTAG); 1428 return (SET_ERROR(EINVAL)); 1429 } 1430 1431 mutex_enter(&os->os_user_ptr_lock); 1432 *zfvp = dmu_objset_get_user(os); 1433 if (*zfvp) { 1434 VFS_HOLD((*zfvp)->z_vfs); 1435 } else { 1436 error = SET_ERROR(ESRCH); 1437 } 1438 mutex_exit(&os->os_user_ptr_lock); 1439 dmu_objset_rele(os, FTAG); 1440 return (error); 1441 } 1442 1443 /* 1444 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which 1445 * case its z_vfs will be NULL, and it will be opened as the owner. 1446 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER, 1447 * which prevents all vnode ops from running. 1448 */ 1449 static int 1450 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer) 1451 { 1452 int error = 0; 1453 1454 if (getzfsvfs(name, zfvp) != 0) 1455 error = zfsvfs_create(name, zfvp); 1456 if (error == 0) { 1457 rrm_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER : 1458 RW_READER, tag); 1459 if ((*zfvp)->z_unmounted) { 1460 /* 1461 * XXX we could probably try again, since the unmounting 1462 * thread should be just about to disassociate the 1463 * objset from the zfsvfs. 1464 */ 1465 rrm_exit(&(*zfvp)->z_teardown_lock, tag); 1466 return (SET_ERROR(EBUSY)); 1467 } 1468 } 1469 return (error); 1470 } 1471 1472 static void 1473 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) 1474 { 1475 rrm_exit(&zfsvfs->z_teardown_lock, tag); 1476 1477 if (zfsvfs->z_vfs) { 1478 VFS_RELE(zfsvfs->z_vfs); 1479 } else { 1480 dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1481 zfsvfs_free(zfsvfs); 1482 } 1483 } 1484 1485 static int 1486 zfs_ioc_pool_create(zfs_cmd_t *zc) 1487 { 1488 int error; 1489 nvlist_t *config, *props = NULL; 1490 nvlist_t *rootprops = NULL; 1491 nvlist_t *zplprops = NULL; 1492 1493 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1494 zc->zc_iflags, &config)) 1495 return (error); 1496 1497 if (zc->zc_nvlist_src_size != 0 && (error = 1498 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1499 zc->zc_iflags, &props))) { 1500 nvlist_free(config); 1501 return (error); 1502 } 1503 1504 if (props) { 1505 nvlist_t *nvl = NULL; 1506 uint64_t version = SPA_VERSION; 1507 1508 (void) nvlist_lookup_uint64(props, 1509 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); 1510 if (!SPA_VERSION_IS_SUPPORTED(version)) { 1511 error = SET_ERROR(EINVAL); 1512 goto pool_props_bad; 1513 } 1514 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); 1515 if (nvl) { 1516 error = nvlist_dup(nvl, &rootprops, KM_SLEEP); 1517 if (error != 0) { 1518 nvlist_free(config); 1519 nvlist_free(props); 1520 return (error); 1521 } 1522 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); 1523 } 1524 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1525 error = zfs_fill_zplprops_root(version, rootprops, 1526 zplprops, NULL); 1527 if (error != 0) 1528 goto pool_props_bad; 1529 } 1530 1531 error = spa_create(zc->zc_name, config, props, zplprops); 1532 1533 /* 1534 * Set the remaining root properties 1535 */ 1536 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, 1537 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) 1538 (void) spa_destroy(zc->zc_name); 1539 1540 pool_props_bad: 1541 nvlist_free(rootprops); 1542 nvlist_free(zplprops); 1543 nvlist_free(config); 1544 nvlist_free(props); 1545 1546 return (error); 1547 } 1548 1549 static int 1550 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 1551 { 1552 int error; 1553 zfs_log_history(zc); 1554 error = spa_destroy(zc->zc_name); 1555 if (error == 0) 1556 zvol_remove_minors(zc->zc_name); 1557 return (error); 1558 } 1559 1560 static int 1561 zfs_ioc_pool_import(zfs_cmd_t *zc) 1562 { 1563 nvlist_t *config, *props = NULL; 1564 uint64_t guid; 1565 int error; 1566 1567 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1568 zc->zc_iflags, &config)) != 0) 1569 return (error); 1570 1571 if (zc->zc_nvlist_src_size != 0 && (error = 1572 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1573 zc->zc_iflags, &props))) { 1574 nvlist_free(config); 1575 return (error); 1576 } 1577 1578 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1579 guid != zc->zc_guid) 1580 error = SET_ERROR(EINVAL); 1581 else 1582 error = spa_import(zc->zc_name, config, props, zc->zc_cookie); 1583 1584 if (zc->zc_nvlist_dst != 0) { 1585 int err; 1586 1587 if ((err = put_nvlist(zc, config)) != 0) 1588 error = err; 1589 } 1590 1591 nvlist_free(config); 1592 1593 nvlist_free(props); 1594 1595 return (error); 1596 } 1597 1598 static int 1599 zfs_ioc_pool_export(zfs_cmd_t *zc) 1600 { 1601 int error; 1602 boolean_t force = (boolean_t)zc->zc_cookie; 1603 boolean_t hardforce = (boolean_t)zc->zc_guid; 1604 1605 zfs_log_history(zc); 1606 error = spa_export(zc->zc_name, NULL, force, hardforce); 1607 if (error == 0) 1608 zvol_remove_minors(zc->zc_name); 1609 return (error); 1610 } 1611 1612 static int 1613 zfs_ioc_pool_configs(zfs_cmd_t *zc) 1614 { 1615 nvlist_t *configs; 1616 int error; 1617 1618 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 1619 return (SET_ERROR(EEXIST)); 1620 1621 error = put_nvlist(zc, configs); 1622 1623 nvlist_free(configs); 1624 1625 return (error); 1626 } 1627 1628 /* 1629 * inputs: 1630 * zc_name name of the pool 1631 * 1632 * outputs: 1633 * zc_cookie real errno 1634 * zc_nvlist_dst config nvlist 1635 * zc_nvlist_dst_size size of config nvlist 1636 */ 1637 static int 1638 zfs_ioc_pool_stats(zfs_cmd_t *zc) 1639 { 1640 nvlist_t *config; 1641 int error; 1642 int ret = 0; 1643 1644 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 1645 sizeof (zc->zc_value)); 1646 1647 if (config != NULL) { 1648 ret = put_nvlist(zc, config); 1649 nvlist_free(config); 1650 1651 /* 1652 * The config may be present even if 'error' is non-zero. 1653 * In this case we return success, and preserve the real errno 1654 * in 'zc_cookie'. 1655 */ 1656 zc->zc_cookie = error; 1657 } else { 1658 ret = error; 1659 } 1660 1661 return (ret); 1662 } 1663 1664 /* 1665 * Try to import the given pool, returning pool stats as appropriate so that 1666 * user land knows which devices are available and overall pool health. 1667 */ 1668 static int 1669 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 1670 { 1671 nvlist_t *tryconfig, *config; 1672 int error; 1673 1674 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1675 zc->zc_iflags, &tryconfig)) != 0) 1676 return (error); 1677 1678 config = spa_tryimport(tryconfig); 1679 1680 nvlist_free(tryconfig); 1681 1682 if (config == NULL) 1683 return (SET_ERROR(EINVAL)); 1684 1685 error = put_nvlist(zc, config); 1686 nvlist_free(config); 1687 1688 return (error); 1689 } 1690 1691 /* 1692 * inputs: 1693 * zc_name name of the pool 1694 * zc_cookie scan func (pool_scan_func_t) 1695 */ 1696 static int 1697 zfs_ioc_pool_scan(zfs_cmd_t *zc) 1698 { 1699 spa_t *spa; 1700 int error; 1701 1702 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1703 return (error); 1704 1705 if (zc->zc_cookie == POOL_SCAN_NONE) 1706 error = spa_scan_stop(spa); 1707 else 1708 error = spa_scan(spa, zc->zc_cookie); 1709 1710 spa_close(spa, FTAG); 1711 1712 return (error); 1713 } 1714 1715 static int 1716 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 1717 { 1718 spa_t *spa; 1719 int error; 1720 1721 error = spa_open(zc->zc_name, &spa, FTAG); 1722 if (error == 0) { 1723 spa_freeze(spa); 1724 spa_close(spa, FTAG); 1725 } 1726 return (error); 1727 } 1728 1729 static int 1730 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 1731 { 1732 spa_t *spa; 1733 int error; 1734 1735 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1736 return (error); 1737 1738 if (zc->zc_cookie < spa_version(spa) || 1739 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) { 1740 spa_close(spa, FTAG); 1741 return (SET_ERROR(EINVAL)); 1742 } 1743 1744 spa_upgrade(spa, zc->zc_cookie); 1745 spa_close(spa, FTAG); 1746 1747 return (error); 1748 } 1749 1750 static int 1751 zfs_ioc_pool_get_history(zfs_cmd_t *zc) 1752 { 1753 spa_t *spa; 1754 char *hist_buf; 1755 uint64_t size; 1756 int error; 1757 1758 if ((size = zc->zc_history_len) == 0) 1759 return (SET_ERROR(EINVAL)); 1760 1761 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1762 return (error); 1763 1764 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 1765 spa_close(spa, FTAG); 1766 return (SET_ERROR(ENOTSUP)); 1767 } 1768 1769 hist_buf = kmem_alloc(size, KM_SLEEP); 1770 if ((error = spa_history_get(spa, &zc->zc_history_offset, 1771 &zc->zc_history_len, hist_buf)) == 0) { 1772 error = ddi_copyout(hist_buf, 1773 (void *)(uintptr_t)zc->zc_history, 1774 zc->zc_history_len, zc->zc_iflags); 1775 } 1776 1777 spa_close(spa, FTAG); 1778 kmem_free(hist_buf, size); 1779 return (error); 1780 } 1781 1782 static int 1783 zfs_ioc_pool_reguid(zfs_cmd_t *zc) 1784 { 1785 spa_t *spa; 1786 int error; 1787 1788 error = spa_open(zc->zc_name, &spa, FTAG); 1789 if (error == 0) { 1790 error = spa_change_guid(spa); 1791 spa_close(spa, FTAG); 1792 } 1793 return (error); 1794 } 1795 1796 static int 1797 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 1798 { 1799 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)); 1800 } 1801 1802 /* 1803 * inputs: 1804 * zc_name name of filesystem 1805 * zc_obj object to find 1806 * 1807 * outputs: 1808 * zc_value name of object 1809 */ 1810 static int 1811 zfs_ioc_obj_to_path(zfs_cmd_t *zc) 1812 { 1813 objset_t *os; 1814 int error; 1815 1816 /* XXX reading from objset not owned */ 1817 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1818 return (error); 1819 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1820 dmu_objset_rele(os, FTAG); 1821 return (SET_ERROR(EINVAL)); 1822 } 1823 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, 1824 sizeof (zc->zc_value)); 1825 dmu_objset_rele(os, FTAG); 1826 1827 return (error); 1828 } 1829 1830 /* 1831 * inputs: 1832 * zc_name name of filesystem 1833 * zc_obj object to find 1834 * 1835 * outputs: 1836 * zc_stat stats on object 1837 * zc_value path to object 1838 */ 1839 static int 1840 zfs_ioc_obj_to_stats(zfs_cmd_t *zc) 1841 { 1842 objset_t *os; 1843 int error; 1844 1845 /* XXX reading from objset not owned */ 1846 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1847 return (error); 1848 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1849 dmu_objset_rele(os, FTAG); 1850 return (SET_ERROR(EINVAL)); 1851 } 1852 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value, 1853 sizeof (zc->zc_value)); 1854 dmu_objset_rele(os, FTAG); 1855 1856 return (error); 1857 } 1858 1859 static int 1860 zfs_ioc_vdev_add(zfs_cmd_t *zc) 1861 { 1862 spa_t *spa; 1863 int error; 1864 nvlist_t *config, **l2cache, **spares; 1865 uint_t nl2cache = 0, nspares = 0; 1866 1867 error = spa_open(zc->zc_name, &spa, FTAG); 1868 if (error != 0) 1869 return (error); 1870 1871 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1872 zc->zc_iflags, &config); 1873 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, 1874 &l2cache, &nl2cache); 1875 1876 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, 1877 &spares, &nspares); 1878 1879 /* 1880 * A root pool with concatenated devices is not supported. 1881 * Thus, can not add a device to a root pool. 1882 * 1883 * Intent log device can not be added to a rootpool because 1884 * during mountroot, zil is replayed, a seperated log device 1885 * can not be accessed during the mountroot time. 1886 * 1887 * l2cache and spare devices are ok to be added to a rootpool. 1888 */ 1889 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { 1890 nvlist_free(config); 1891 spa_close(spa, FTAG); 1892 return (SET_ERROR(EDOM)); 1893 } 1894 1895 if (error == 0) { 1896 error = spa_vdev_add(spa, config); 1897 nvlist_free(config); 1898 } 1899 spa_close(spa, FTAG); 1900 return (error); 1901 } 1902 1903 /* 1904 * inputs: 1905 * zc_name name of the pool 1906 * zc_nvlist_conf nvlist of devices to remove 1907 * zc_cookie to stop the remove? 1908 */ 1909 static int 1910 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 1911 { 1912 spa_t *spa; 1913 int error; 1914 1915 error = spa_open(zc->zc_name, &spa, FTAG); 1916 if (error != 0) 1917 return (error); 1918 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 1919 spa_close(spa, FTAG); 1920 return (error); 1921 } 1922 1923 static int 1924 zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 1925 { 1926 spa_t *spa; 1927 int error; 1928 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 1929 1930 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1931 return (error); 1932 switch (zc->zc_cookie) { 1933 case VDEV_STATE_ONLINE: 1934 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 1935 break; 1936 1937 case VDEV_STATE_OFFLINE: 1938 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 1939 break; 1940 1941 case VDEV_STATE_FAULTED: 1942 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1943 zc->zc_obj != VDEV_AUX_EXTERNAL) 1944 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1945 1946 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); 1947 break; 1948 1949 case VDEV_STATE_DEGRADED: 1950 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1951 zc->zc_obj != VDEV_AUX_EXTERNAL) 1952 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1953 1954 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj); 1955 break; 1956 1957 default: 1958 error = SET_ERROR(EINVAL); 1959 } 1960 zc->zc_cookie = newstate; 1961 spa_close(spa, FTAG); 1962 return (error); 1963 } 1964 1965 static int 1966 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1967 { 1968 spa_t *spa; 1969 int replacing = zc->zc_cookie; 1970 nvlist_t *config; 1971 int error; 1972 1973 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1974 return (error); 1975 1976 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1977 zc->zc_iflags, &config)) == 0) { 1978 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 1979 nvlist_free(config); 1980 } 1981 1982 spa_close(spa, FTAG); 1983 return (error); 1984 } 1985 1986 static int 1987 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 1988 { 1989 spa_t *spa; 1990 int error; 1991 1992 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1993 return (error); 1994 1995 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); 1996 1997 spa_close(spa, FTAG); 1998 return (error); 1999 } 2000 2001 static int 2002 zfs_ioc_vdev_split(zfs_cmd_t *zc) 2003 { 2004 spa_t *spa; 2005 nvlist_t *config, *props = NULL; 2006 int error; 2007 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT); 2008 2009 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 2010 return (error); 2011 2012 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 2013 zc->zc_iflags, &config)) { 2014 spa_close(spa, FTAG); 2015 return (error); 2016 } 2017 2018 if (zc->zc_nvlist_src_size != 0 && (error = 2019 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2020 zc->zc_iflags, &props))) { 2021 spa_close(spa, FTAG); 2022 nvlist_free(config); 2023 return (error); 2024 } 2025 2026 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp); 2027 2028 spa_close(spa, FTAG); 2029 2030 nvlist_free(config); 2031 nvlist_free(props); 2032 2033 return (error); 2034 } 2035 2036 static int 2037 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 2038 { 2039 spa_t *spa; 2040 char *path = zc->zc_value; 2041 uint64_t guid = zc->zc_guid; 2042 int error; 2043 2044 error = spa_open(zc->zc_name, &spa, FTAG); 2045 if (error != 0) 2046 return (error); 2047 2048 error = spa_vdev_setpath(spa, guid, path); 2049 spa_close(spa, FTAG); 2050 return (error); 2051 } 2052 2053 static int 2054 zfs_ioc_vdev_setfru(zfs_cmd_t *zc) 2055 { 2056 spa_t *spa; 2057 char *fru = zc->zc_value; 2058 uint64_t guid = zc->zc_guid; 2059 int error; 2060 2061 error = spa_open(zc->zc_name, &spa, FTAG); 2062 if (error != 0) 2063 return (error); 2064 2065 error = spa_vdev_setfru(spa, guid, fru); 2066 spa_close(spa, FTAG); 2067 return (error); 2068 } 2069 2070 static int 2071 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os) 2072 { 2073 int error = 0; 2074 nvlist_t *nv; 2075 2076 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 2077 2078 if (zc->zc_nvlist_dst != 0 && 2079 (error = dsl_prop_get_all(os, &nv)) == 0) { 2080 dmu_objset_stats(os, nv); 2081 /* 2082 * NB: zvol_get_stats() will read the objset contents, 2083 * which we aren't supposed to do with a 2084 * DS_MODE_USER hold, because it could be 2085 * inconsistent. So this is a bit of a workaround... 2086 * XXX reading with out owning 2087 */ 2088 if (!zc->zc_objset_stats.dds_inconsistent && 2089 dmu_objset_type(os) == DMU_OST_ZVOL) { 2090 error = zvol_get_stats(os, nv); 2091 if (error == EIO) 2092 return (error); 2093 VERIFY0(error); 2094 } 2095 error = put_nvlist(zc, nv); 2096 nvlist_free(nv); 2097 } 2098 2099 return (error); 2100 } 2101 2102 /* 2103 * inputs: 2104 * zc_name name of filesystem 2105 * zc_nvlist_dst_size size of buffer for property nvlist 2106 * 2107 * outputs: 2108 * zc_objset_stats stats 2109 * zc_nvlist_dst property nvlist 2110 * zc_nvlist_dst_size size of property nvlist 2111 */ 2112 static int 2113 zfs_ioc_objset_stats(zfs_cmd_t *zc) 2114 { 2115 objset_t *os; 2116 int error; 2117 2118 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2119 if (error == 0) { 2120 error = zfs_ioc_objset_stats_impl(zc, os); 2121 dmu_objset_rele(os, FTAG); 2122 } 2123 2124 return (error); 2125 } 2126 2127 /* 2128 * inputs: 2129 * zc_name name of filesystem 2130 * zc_nvlist_dst_size size of buffer for property nvlist 2131 * 2132 * outputs: 2133 * zc_nvlist_dst received property nvlist 2134 * zc_nvlist_dst_size size of received property nvlist 2135 * 2136 * Gets received properties (distinct from local properties on or after 2137 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from 2138 * local property values. 2139 */ 2140 static int 2141 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) 2142 { 2143 int error = 0; 2144 nvlist_t *nv; 2145 2146 /* 2147 * Without this check, we would return local property values if the 2148 * caller has not already received properties on or after 2149 * SPA_VERSION_RECVD_PROPS. 2150 */ 2151 if (!dsl_prop_get_hasrecvd(zc->zc_name)) 2152 return (SET_ERROR(ENOTSUP)); 2153 2154 if (zc->zc_nvlist_dst != 0 && 2155 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) { 2156 error = put_nvlist(zc, nv); 2157 nvlist_free(nv); 2158 } 2159 2160 return (error); 2161 } 2162 2163 static int 2164 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) 2165 { 2166 uint64_t value; 2167 int error; 2168 2169 /* 2170 * zfs_get_zplprop() will either find a value or give us 2171 * the default value (if there is one). 2172 */ 2173 if ((error = zfs_get_zplprop(os, prop, &value)) != 0) 2174 return (error); 2175 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); 2176 return (0); 2177 } 2178 2179 /* 2180 * inputs: 2181 * zc_name name of filesystem 2182 * zc_nvlist_dst_size size of buffer for zpl property nvlist 2183 * 2184 * outputs: 2185 * zc_nvlist_dst zpl property nvlist 2186 * zc_nvlist_dst_size size of zpl property nvlist 2187 */ 2188 static int 2189 zfs_ioc_objset_zplprops(zfs_cmd_t *zc) 2190 { 2191 objset_t *os; 2192 int err; 2193 2194 /* XXX reading without owning */ 2195 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) 2196 return (err); 2197 2198 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 2199 2200 /* 2201 * NB: nvl_add_zplprop() will read the objset contents, 2202 * which we aren't supposed to do with a DS_MODE_USER 2203 * hold, because it could be inconsistent. 2204 */ 2205 if (zc->zc_nvlist_dst != NULL && 2206 !zc->zc_objset_stats.dds_inconsistent && 2207 dmu_objset_type(os) == DMU_OST_ZFS) { 2208 nvlist_t *nv; 2209 2210 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2211 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && 2212 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && 2213 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && 2214 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) 2215 err = put_nvlist(zc, nv); 2216 nvlist_free(nv); 2217 } else { 2218 err = SET_ERROR(ENOENT); 2219 } 2220 dmu_objset_rele(os, FTAG); 2221 return (err); 2222 } 2223 2224 static boolean_t 2225 dataset_name_hidden(const char *name) 2226 { 2227 /* 2228 * Skip over datasets that are not visible in this zone, 2229 * internal datasets (which have a $ in their name), and 2230 * temporary datasets (which have a % in their name). 2231 */ 2232 if (strchr(name, '$') != NULL) 2233 return (B_TRUE); 2234 if (strchr(name, '%') != NULL) 2235 return (B_TRUE); 2236 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 2237 return (B_TRUE); 2238 return (B_FALSE); 2239 } 2240 2241 /* 2242 * inputs: 2243 * zc_name name of filesystem 2244 * zc_cookie zap cursor 2245 * zc_nvlist_dst_size size of buffer for property nvlist 2246 * 2247 * outputs: 2248 * zc_name name of next filesystem 2249 * zc_cookie zap cursor 2250 * zc_objset_stats stats 2251 * zc_nvlist_dst property nvlist 2252 * zc_nvlist_dst_size size of property nvlist 2253 */ 2254 static int 2255 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 2256 { 2257 objset_t *os; 2258 int error; 2259 char *p; 2260 size_t orig_len = strlen(zc->zc_name); 2261 2262 top: 2263 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { 2264 if (error == ENOENT) 2265 error = SET_ERROR(ESRCH); 2266 return (error); 2267 } 2268 2269 p = strrchr(zc->zc_name, '/'); 2270 if (p == NULL || p[1] != '\0') 2271 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 2272 p = zc->zc_name + strlen(zc->zc_name); 2273 2274 do { 2275 error = dmu_dir_list_next(os, 2276 sizeof (zc->zc_name) - (p - zc->zc_name), p, 2277 NULL, &zc->zc_cookie); 2278 if (error == ENOENT) 2279 error = SET_ERROR(ESRCH); 2280 } while (error == 0 && dataset_name_hidden(zc->zc_name)); 2281 dmu_objset_rele(os, FTAG); 2282 2283 /* 2284 * If it's an internal dataset (ie. with a '$' in its name), 2285 * don't try to get stats for it, otherwise we'll return ENOENT. 2286 */ 2287 if (error == 0 && strchr(zc->zc_name, '$') == NULL) { 2288 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 2289 if (error == ENOENT) { 2290 /* We lost a race with destroy, get the next one. */ 2291 zc->zc_name[orig_len] = '\0'; 2292 goto top; 2293 } 2294 } 2295 return (error); 2296 } 2297 2298 /* 2299 * inputs: 2300 * zc_name name of filesystem 2301 * zc_cookie zap cursor 2302 * zc_nvlist_dst_size size of buffer for property nvlist 2303 * 2304 * outputs: 2305 * zc_name name of next snapshot 2306 * zc_objset_stats stats 2307 * zc_nvlist_dst property nvlist 2308 * zc_nvlist_dst_size size of property nvlist 2309 */ 2310 static int 2311 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 2312 { 2313 objset_t *os; 2314 int error; 2315 2316 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2317 if (error != 0) { 2318 return (error == ENOENT ? ESRCH : error); 2319 } 2320 2321 /* 2322 * A dataset name of maximum length cannot have any snapshots, 2323 * so exit immediately. 2324 */ 2325 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 2326 dmu_objset_rele(os, FTAG); 2327 return (SET_ERROR(ESRCH)); 2328 } 2329 2330 error = dmu_snapshot_list_next(os, 2331 sizeof (zc->zc_name) - strlen(zc->zc_name), 2332 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie, 2333 NULL); 2334 2335 if (error == 0) { 2336 dsl_dataset_t *ds; 2337 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool; 2338 2339 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds); 2340 if (error == 0) { 2341 objset_t *ossnap; 2342 2343 error = dmu_objset_from_ds(ds, &ossnap); 2344 if (error == 0) 2345 error = zfs_ioc_objset_stats_impl(zc, ossnap); 2346 dsl_dataset_rele(ds, FTAG); 2347 } 2348 } else if (error == ENOENT) { 2349 error = SET_ERROR(ESRCH); 2350 } 2351 2352 dmu_objset_rele(os, FTAG); 2353 /* if we failed, undo the @ that we tacked on to zc_name */ 2354 if (error != 0) 2355 *strchr(zc->zc_name, '@') = '\0'; 2356 return (error); 2357 } 2358 2359 static int 2360 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) 2361 { 2362 const char *propname = nvpair_name(pair); 2363 uint64_t *valary; 2364 unsigned int vallen; 2365 const char *domain; 2366 char *dash; 2367 zfs_userquota_prop_t type; 2368 uint64_t rid; 2369 uint64_t quota; 2370 zfsvfs_t *zfsvfs; 2371 int err; 2372 2373 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2374 nvlist_t *attrs; 2375 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2376 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2377 &pair) != 0) 2378 return (SET_ERROR(EINVAL)); 2379 } 2380 2381 /* 2382 * A correctly constructed propname is encoded as 2383 * userquota@<rid>-<domain>. 2384 */ 2385 if ((dash = strchr(propname, '-')) == NULL || 2386 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 || 2387 vallen != 3) 2388 return (SET_ERROR(EINVAL)); 2389 2390 domain = dash + 1; 2391 type = valary[0]; 2392 rid = valary[1]; 2393 quota = valary[2]; 2394 2395 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE); 2396 if (err == 0) { 2397 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); 2398 zfsvfs_rele(zfsvfs, FTAG); 2399 } 2400 2401 return (err); 2402 } 2403 2404 /* 2405 * If the named property is one that has a special function to set its value, 2406 * return 0 on success and a positive error code on failure; otherwise if it is 2407 * not one of the special properties handled by this function, return -1. 2408 * 2409 * XXX: It would be better for callers of the property interface if we handled 2410 * these special cases in dsl_prop.c (in the dsl layer). 2411 */ 2412 static int 2413 zfs_prop_set_special(const char *dsname, zprop_source_t source, 2414 nvpair_t *pair) 2415 { 2416 const char *propname = nvpair_name(pair); 2417 zfs_prop_t prop = zfs_name_to_prop(propname); 2418 uint64_t intval; 2419 int err = -1; 2420 2421 if (prop == ZPROP_INVAL) { 2422 if (zfs_prop_userquota(propname)) 2423 return (zfs_prop_set_userquota(dsname, pair)); 2424 return (-1); 2425 } 2426 2427 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2428 nvlist_t *attrs; 2429 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2430 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2431 &pair) == 0); 2432 } 2433 2434 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) 2435 return (-1); 2436 2437 VERIFY(0 == nvpair_value_uint64(pair, &intval)); 2438 2439 switch (prop) { 2440 case ZFS_PROP_QUOTA: 2441 err = dsl_dir_set_quota(dsname, source, intval); 2442 break; 2443 case ZFS_PROP_REFQUOTA: 2444 err = dsl_dataset_set_refquota(dsname, source, intval); 2445 break; 2446 case ZFS_PROP_FILESYSTEM_LIMIT: 2447 case ZFS_PROP_SNAPSHOT_LIMIT: 2448 if (intval == UINT64_MAX) { 2449 /* clearing the limit, just do it */ 2450 err = 0; 2451 } else { 2452 err = dsl_dir_activate_fs_ss_limit(dsname); 2453 } 2454 /* 2455 * Set err to -1 to force the zfs_set_prop_nvlist code down the 2456 * default path to set the value in the nvlist. 2457 */ 2458 if (err == 0) 2459 err = -1; 2460 break; 2461 case ZFS_PROP_RESERVATION: 2462 err = dsl_dir_set_reservation(dsname, source, intval); 2463 break; 2464 case ZFS_PROP_REFRESERVATION: 2465 err = dsl_dataset_set_refreservation(dsname, source, intval); 2466 break; 2467 case ZFS_PROP_VOLSIZE: 2468 err = zvol_set_volsize(dsname, intval); 2469 break; 2470 case ZFS_PROP_VERSION: 2471 { 2472 zfsvfs_t *zfsvfs; 2473 2474 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0) 2475 break; 2476 2477 err = zfs_set_version(zfsvfs, intval); 2478 zfsvfs_rele(zfsvfs, FTAG); 2479 2480 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { 2481 zfs_cmd_t *zc; 2482 2483 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 2484 (void) strcpy(zc->zc_name, dsname); 2485 (void) zfs_ioc_userspace_upgrade(zc); 2486 kmem_free(zc, sizeof (zfs_cmd_t)); 2487 } 2488 break; 2489 } 2490 default: 2491 err = -1; 2492 } 2493 2494 return (err); 2495 } 2496 2497 /* 2498 * This function is best effort. If it fails to set any of the given properties, 2499 * it continues to set as many as it can and returns the last error 2500 * encountered. If the caller provides a non-NULL errlist, it will be filled in 2501 * with the list of names of all the properties that failed along with the 2502 * corresponding error numbers. 2503 * 2504 * If every property is set successfully, zero is returned and errlist is not 2505 * modified. 2506 */ 2507 int 2508 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, 2509 nvlist_t *errlist) 2510 { 2511 nvpair_t *pair; 2512 nvpair_t *propval; 2513 int rv = 0; 2514 uint64_t intval; 2515 char *strval; 2516 nvlist_t *genericnvl = fnvlist_alloc(); 2517 nvlist_t *retrynvl = fnvlist_alloc(); 2518 2519 retry: 2520 pair = NULL; 2521 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2522 const char *propname = nvpair_name(pair); 2523 zfs_prop_t prop = zfs_name_to_prop(propname); 2524 int err = 0; 2525 2526 /* decode the property value */ 2527 propval = pair; 2528 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2529 nvlist_t *attrs; 2530 attrs = fnvpair_value_nvlist(pair); 2531 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2532 &propval) != 0) 2533 err = SET_ERROR(EINVAL); 2534 } 2535 2536 /* Validate value type */ 2537 if (err == 0 && prop == ZPROP_INVAL) { 2538 if (zfs_prop_user(propname)) { 2539 if (nvpair_type(propval) != DATA_TYPE_STRING) 2540 err = SET_ERROR(EINVAL); 2541 } else if (zfs_prop_userquota(propname)) { 2542 if (nvpair_type(propval) != 2543 DATA_TYPE_UINT64_ARRAY) 2544 err = SET_ERROR(EINVAL); 2545 } else { 2546 err = SET_ERROR(EINVAL); 2547 } 2548 } else if (err == 0) { 2549 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2550 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) 2551 err = SET_ERROR(EINVAL); 2552 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { 2553 const char *unused; 2554 2555 intval = fnvpair_value_uint64(propval); 2556 2557 switch (zfs_prop_get_type(prop)) { 2558 case PROP_TYPE_NUMBER: 2559 break; 2560 case PROP_TYPE_STRING: 2561 err = SET_ERROR(EINVAL); 2562 break; 2563 case PROP_TYPE_INDEX: 2564 if (zfs_prop_index_to_string(prop, 2565 intval, &unused) != 0) 2566 err = SET_ERROR(EINVAL); 2567 break; 2568 default: 2569 cmn_err(CE_PANIC, 2570 "unknown property type"); 2571 } 2572 } else { 2573 err = SET_ERROR(EINVAL); 2574 } 2575 } 2576 2577 /* Validate permissions */ 2578 if (err == 0) 2579 err = zfs_check_settable(dsname, pair, CRED()); 2580 2581 if (err == 0) { 2582 err = zfs_prop_set_special(dsname, source, pair); 2583 if (err == -1) { 2584 /* 2585 * For better performance we build up a list of 2586 * properties to set in a single transaction. 2587 */ 2588 err = nvlist_add_nvpair(genericnvl, pair); 2589 } else if (err != 0 && nvl != retrynvl) { 2590 /* 2591 * This may be a spurious error caused by 2592 * receiving quota and reservation out of order. 2593 * Try again in a second pass. 2594 */ 2595 err = nvlist_add_nvpair(retrynvl, pair); 2596 } 2597 } 2598 2599 if (err != 0) { 2600 if (errlist != NULL) 2601 fnvlist_add_int32(errlist, propname, err); 2602 rv = err; 2603 } 2604 } 2605 2606 if (nvl != retrynvl && !nvlist_empty(retrynvl)) { 2607 nvl = retrynvl; 2608 goto retry; 2609 } 2610 2611 if (!nvlist_empty(genericnvl) && 2612 dsl_props_set(dsname, source, genericnvl) != 0) { 2613 /* 2614 * If this fails, we still want to set as many properties as we 2615 * can, so try setting them individually. 2616 */ 2617 pair = NULL; 2618 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { 2619 const char *propname = nvpair_name(pair); 2620 int err = 0; 2621 2622 propval = pair; 2623 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2624 nvlist_t *attrs; 2625 attrs = fnvpair_value_nvlist(pair); 2626 propval = fnvlist_lookup_nvpair(attrs, 2627 ZPROP_VALUE); 2628 } 2629 2630 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2631 strval = fnvpair_value_string(propval); 2632 err = dsl_prop_set_string(dsname, propname, 2633 source, strval); 2634 } else { 2635 intval = fnvpair_value_uint64(propval); 2636 err = dsl_prop_set_int(dsname, propname, source, 2637 intval); 2638 } 2639 2640 if (err != 0) { 2641 if (errlist != NULL) { 2642 fnvlist_add_int32(errlist, propname, 2643 err); 2644 } 2645 rv = err; 2646 } 2647 } 2648 } 2649 nvlist_free(genericnvl); 2650 nvlist_free(retrynvl); 2651 2652 return (rv); 2653 } 2654 2655 /* 2656 * Check that all the properties are valid user properties. 2657 */ 2658 static int 2659 zfs_check_userprops(const char *fsname, nvlist_t *nvl) 2660 { 2661 nvpair_t *pair = NULL; 2662 int error = 0; 2663 2664 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2665 const char *propname = nvpair_name(pair); 2666 2667 if (!zfs_prop_user(propname) || 2668 nvpair_type(pair) != DATA_TYPE_STRING) 2669 return (SET_ERROR(EINVAL)); 2670 2671 if (error = zfs_secpolicy_write_perms(fsname, 2672 ZFS_DELEG_PERM_USERPROP, CRED())) 2673 return (error); 2674 2675 if (strlen(propname) >= ZAP_MAXNAMELEN) 2676 return (SET_ERROR(ENAMETOOLONG)); 2677 2678 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN) 2679 return (E2BIG); 2680 } 2681 return (0); 2682 } 2683 2684 static void 2685 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) 2686 { 2687 nvpair_t *pair; 2688 2689 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2690 2691 pair = NULL; 2692 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { 2693 if (nvlist_exists(skipped, nvpair_name(pair))) 2694 continue; 2695 2696 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); 2697 } 2698 } 2699 2700 static int 2701 clear_received_props(const char *dsname, nvlist_t *props, 2702 nvlist_t *skipped) 2703 { 2704 int err = 0; 2705 nvlist_t *cleared_props = NULL; 2706 props_skip(props, skipped, &cleared_props); 2707 if (!nvlist_empty(cleared_props)) { 2708 /* 2709 * Acts on local properties until the dataset has received 2710 * properties at least once on or after SPA_VERSION_RECVD_PROPS. 2711 */ 2712 zprop_source_t flags = (ZPROP_SRC_NONE | 2713 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0)); 2714 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL); 2715 } 2716 nvlist_free(cleared_props); 2717 return (err); 2718 } 2719 2720 /* 2721 * inputs: 2722 * zc_name name of filesystem 2723 * zc_value name of property to set 2724 * zc_nvlist_src{_size} nvlist of properties to apply 2725 * zc_cookie received properties flag 2726 * 2727 * outputs: 2728 * zc_nvlist_dst{_size} error for each unapplied received property 2729 */ 2730 static int 2731 zfs_ioc_set_prop(zfs_cmd_t *zc) 2732 { 2733 nvlist_t *nvl; 2734 boolean_t received = zc->zc_cookie; 2735 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : 2736 ZPROP_SRC_LOCAL); 2737 nvlist_t *errors; 2738 int error; 2739 2740 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2741 zc->zc_iflags, &nvl)) != 0) 2742 return (error); 2743 2744 if (received) { 2745 nvlist_t *origprops; 2746 2747 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) { 2748 (void) clear_received_props(zc->zc_name, 2749 origprops, nvl); 2750 nvlist_free(origprops); 2751 } 2752 2753 error = dsl_prop_set_hasrecvd(zc->zc_name); 2754 } 2755 2756 errors = fnvlist_alloc(); 2757 if (error == 0) 2758 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors); 2759 2760 if (zc->zc_nvlist_dst != NULL && errors != NULL) { 2761 (void) put_nvlist(zc, errors); 2762 } 2763 2764 nvlist_free(errors); 2765 nvlist_free(nvl); 2766 return (error); 2767 } 2768 2769 /* 2770 * inputs: 2771 * zc_name name of filesystem 2772 * zc_value name of property to inherit 2773 * zc_cookie revert to received value if TRUE 2774 * 2775 * outputs: none 2776 */ 2777 static int 2778 zfs_ioc_inherit_prop(zfs_cmd_t *zc) 2779 { 2780 const char *propname = zc->zc_value; 2781 zfs_prop_t prop = zfs_name_to_prop(propname); 2782 boolean_t received = zc->zc_cookie; 2783 zprop_source_t source = (received 2784 ? ZPROP_SRC_NONE /* revert to received value, if any */ 2785 : ZPROP_SRC_INHERITED); /* explicitly inherit */ 2786 2787 if (received) { 2788 nvlist_t *dummy; 2789 nvpair_t *pair; 2790 zprop_type_t type; 2791 int err; 2792 2793 /* 2794 * zfs_prop_set_special() expects properties in the form of an 2795 * nvpair with type info. 2796 */ 2797 if (prop == ZPROP_INVAL) { 2798 if (!zfs_prop_user(propname)) 2799 return (SET_ERROR(EINVAL)); 2800 2801 type = PROP_TYPE_STRING; 2802 } else if (prop == ZFS_PROP_VOLSIZE || 2803 prop == ZFS_PROP_VERSION) { 2804 return (SET_ERROR(EINVAL)); 2805 } else { 2806 type = zfs_prop_get_type(prop); 2807 } 2808 2809 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2810 2811 switch (type) { 2812 case PROP_TYPE_STRING: 2813 VERIFY(0 == nvlist_add_string(dummy, propname, "")); 2814 break; 2815 case PROP_TYPE_NUMBER: 2816 case PROP_TYPE_INDEX: 2817 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); 2818 break; 2819 default: 2820 nvlist_free(dummy); 2821 return (SET_ERROR(EINVAL)); 2822 } 2823 2824 pair = nvlist_next_nvpair(dummy, NULL); 2825 err = zfs_prop_set_special(zc->zc_name, source, pair); 2826 nvlist_free(dummy); 2827 if (err != -1) 2828 return (err); /* special property already handled */ 2829 } else { 2830 /* 2831 * Only check this in the non-received case. We want to allow 2832 * 'inherit -S' to revert non-inheritable properties like quota 2833 * and reservation to the received or default values even though 2834 * they are not considered inheritable. 2835 */ 2836 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) 2837 return (SET_ERROR(EINVAL)); 2838 } 2839 2840 /* property name has been validated by zfs_secpolicy_inherit_prop() */ 2841 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source)); 2842 } 2843 2844 static int 2845 zfs_ioc_pool_set_props(zfs_cmd_t *zc) 2846 { 2847 nvlist_t *props; 2848 spa_t *spa; 2849 int error; 2850 nvpair_t *pair; 2851 2852 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2853 zc->zc_iflags, &props)) 2854 return (error); 2855 2856 /* 2857 * If the only property is the configfile, then just do a spa_lookup() 2858 * to handle the faulted case. 2859 */ 2860 pair = nvlist_next_nvpair(props, NULL); 2861 if (pair != NULL && strcmp(nvpair_name(pair), 2862 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && 2863 nvlist_next_nvpair(props, pair) == NULL) { 2864 mutex_enter(&spa_namespace_lock); 2865 if ((spa = spa_lookup(zc->zc_name)) != NULL) { 2866 spa_configfile_set(spa, props, B_FALSE); 2867 spa_config_sync(spa, B_FALSE, B_TRUE); 2868 } 2869 mutex_exit(&spa_namespace_lock); 2870 if (spa != NULL) { 2871 nvlist_free(props); 2872 return (0); 2873 } 2874 } 2875 2876 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2877 nvlist_free(props); 2878 return (error); 2879 } 2880 2881 error = spa_prop_set(spa, props); 2882 2883 nvlist_free(props); 2884 spa_close(spa, FTAG); 2885 2886 return (error); 2887 } 2888 2889 static int 2890 zfs_ioc_pool_get_props(zfs_cmd_t *zc) 2891 { 2892 spa_t *spa; 2893 int error; 2894 nvlist_t *nvp = NULL; 2895 2896 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2897 /* 2898 * If the pool is faulted, there may be properties we can still 2899 * get (such as altroot and cachefile), so attempt to get them 2900 * anyway. 2901 */ 2902 mutex_enter(&spa_namespace_lock); 2903 if ((spa = spa_lookup(zc->zc_name)) != NULL) 2904 error = spa_prop_get(spa, &nvp); 2905 mutex_exit(&spa_namespace_lock); 2906 } else { 2907 error = spa_prop_get(spa, &nvp); 2908 spa_close(spa, FTAG); 2909 } 2910 2911 if (error == 0 && zc->zc_nvlist_dst != NULL) 2912 error = put_nvlist(zc, nvp); 2913 else 2914 error = SET_ERROR(EFAULT); 2915 2916 nvlist_free(nvp); 2917 return (error); 2918 } 2919 2920 /* 2921 * inputs: 2922 * zc_name name of filesystem 2923 * zc_nvlist_src{_size} nvlist of delegated permissions 2924 * zc_perm_action allow/unallow flag 2925 * 2926 * outputs: none 2927 */ 2928 static int 2929 zfs_ioc_set_fsacl(zfs_cmd_t *zc) 2930 { 2931 int error; 2932 nvlist_t *fsaclnv = NULL; 2933 2934 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2935 zc->zc_iflags, &fsaclnv)) != 0) 2936 return (error); 2937 2938 /* 2939 * Verify nvlist is constructed correctly 2940 */ 2941 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 2942 nvlist_free(fsaclnv); 2943 return (SET_ERROR(EINVAL)); 2944 } 2945 2946 /* 2947 * If we don't have PRIV_SYS_MOUNT, then validate 2948 * that user is allowed to hand out each permission in 2949 * the nvlist(s) 2950 */ 2951 2952 error = secpolicy_zfs(CRED()); 2953 if (error != 0) { 2954 if (zc->zc_perm_action == B_FALSE) { 2955 error = dsl_deleg_can_allow(zc->zc_name, 2956 fsaclnv, CRED()); 2957 } else { 2958 error = dsl_deleg_can_unallow(zc->zc_name, 2959 fsaclnv, CRED()); 2960 } 2961 } 2962 2963 if (error == 0) 2964 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 2965 2966 nvlist_free(fsaclnv); 2967 return (error); 2968 } 2969 2970 /* 2971 * inputs: 2972 * zc_name name of filesystem 2973 * 2974 * outputs: 2975 * zc_nvlist_src{_size} nvlist of delegated permissions 2976 */ 2977 static int 2978 zfs_ioc_get_fsacl(zfs_cmd_t *zc) 2979 { 2980 nvlist_t *nvp; 2981 int error; 2982 2983 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 2984 error = put_nvlist(zc, nvp); 2985 nvlist_free(nvp); 2986 } 2987 2988 return (error); 2989 } 2990 2991 /* 2992 * Search the vfs list for a specified resource. Returns a pointer to it 2993 * or NULL if no suitable entry is found. The caller of this routine 2994 * is responsible for releasing the returned vfs pointer. 2995 */ 2996 static vfs_t * 2997 zfs_get_vfs(const char *resource) 2998 { 2999 struct vfs *vfsp; 3000 struct vfs *vfs_found = NULL; 3001 3002 vfs_list_read_lock(); 3003 vfsp = rootvfs; 3004 do { 3005 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 3006 VFS_HOLD(vfsp); 3007 vfs_found = vfsp; 3008 break; 3009 } 3010 vfsp = vfsp->vfs_next; 3011 } while (vfsp != rootvfs); 3012 vfs_list_unlock(); 3013 return (vfs_found); 3014 } 3015 3016 /* ARGSUSED */ 3017 static void 3018 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 3019 { 3020 zfs_creat_t *zct = arg; 3021 3022 zfs_create_fs(os, cr, zct->zct_zplprops, tx); 3023 } 3024 3025 #define ZFS_PROP_UNDEFINED ((uint64_t)-1) 3026 3027 /* 3028 * inputs: 3029 * os parent objset pointer (NULL if root fs) 3030 * fuids_ok fuids allowed in this version of the spa? 3031 * sa_ok SAs allowed in this version of the spa? 3032 * createprops list of properties requested by creator 3033 * 3034 * outputs: 3035 * zplprops values for the zplprops we attach to the master node object 3036 * is_ci true if requested file system will be purely case-insensitive 3037 * 3038 * Determine the settings for utf8only, normalization and 3039 * casesensitivity. Specific values may have been requested by the 3040 * creator and/or we can inherit values from the parent dataset. If 3041 * the file system is of too early a vintage, a creator can not 3042 * request settings for these properties, even if the requested 3043 * setting is the default value. We don't actually want to create dsl 3044 * properties for these, so remove them from the source nvlist after 3045 * processing. 3046 */ 3047 static int 3048 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, 3049 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops, 3050 nvlist_t *zplprops, boolean_t *is_ci) 3051 { 3052 uint64_t sense = ZFS_PROP_UNDEFINED; 3053 uint64_t norm = ZFS_PROP_UNDEFINED; 3054 uint64_t u8 = ZFS_PROP_UNDEFINED; 3055 3056 ASSERT(zplprops != NULL); 3057 3058 /* 3059 * Pull out creator prop choices, if any. 3060 */ 3061 if (createprops) { 3062 (void) nvlist_lookup_uint64(createprops, 3063 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); 3064 (void) nvlist_lookup_uint64(createprops, 3065 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); 3066 (void) nvlist_remove_all(createprops, 3067 zfs_prop_to_name(ZFS_PROP_NORMALIZE)); 3068 (void) nvlist_lookup_uint64(createprops, 3069 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); 3070 (void) nvlist_remove_all(createprops, 3071 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 3072 (void) nvlist_lookup_uint64(createprops, 3073 zfs_prop_to_name(ZFS_PROP_CASE), &sense); 3074 (void) nvlist_remove_all(createprops, 3075 zfs_prop_to_name(ZFS_PROP_CASE)); 3076 } 3077 3078 /* 3079 * If the zpl version requested is whacky or the file system 3080 * or pool is version is too "young" to support normalization 3081 * and the creator tried to set a value for one of the props, 3082 * error out. 3083 */ 3084 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || 3085 (zplver >= ZPL_VERSION_FUID && !fuids_ok) || 3086 (zplver >= ZPL_VERSION_SA && !sa_ok) || 3087 (zplver < ZPL_VERSION_NORMALIZATION && 3088 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || 3089 sense != ZFS_PROP_UNDEFINED))) 3090 return (SET_ERROR(ENOTSUP)); 3091 3092 /* 3093 * Put the version in the zplprops 3094 */ 3095 VERIFY(nvlist_add_uint64(zplprops, 3096 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); 3097 3098 if (norm == ZFS_PROP_UNDEFINED) 3099 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); 3100 VERIFY(nvlist_add_uint64(zplprops, 3101 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); 3102 3103 /* 3104 * If we're normalizing, names must always be valid UTF-8 strings. 3105 */ 3106 if (norm) 3107 u8 = 1; 3108 if (u8 == ZFS_PROP_UNDEFINED) 3109 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); 3110 VERIFY(nvlist_add_uint64(zplprops, 3111 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); 3112 3113 if (sense == ZFS_PROP_UNDEFINED) 3114 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); 3115 VERIFY(nvlist_add_uint64(zplprops, 3116 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); 3117 3118 if (is_ci) 3119 *is_ci = (sense == ZFS_CASE_INSENSITIVE); 3120 3121 return (0); 3122 } 3123 3124 static int 3125 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, 3126 nvlist_t *zplprops, boolean_t *is_ci) 3127 { 3128 boolean_t fuids_ok, sa_ok; 3129 uint64_t zplver = ZPL_VERSION; 3130 objset_t *os = NULL; 3131 char parentname[MAXNAMELEN]; 3132 char *cp; 3133 spa_t *spa; 3134 uint64_t spa_vers; 3135 int error; 3136 3137 (void) strlcpy(parentname, dataset, sizeof (parentname)); 3138 cp = strrchr(parentname, '/'); 3139 ASSERT(cp != NULL); 3140 cp[0] = '\0'; 3141 3142 if ((error = spa_open(dataset, &spa, FTAG)) != 0) 3143 return (error); 3144 3145 spa_vers = spa_version(spa); 3146 spa_close(spa, FTAG); 3147 3148 zplver = zfs_zpl_version_map(spa_vers); 3149 fuids_ok = (zplver >= ZPL_VERSION_FUID); 3150 sa_ok = (zplver >= ZPL_VERSION_SA); 3151 3152 /* 3153 * Open parent object set so we can inherit zplprop values. 3154 */ 3155 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) 3156 return (error); 3157 3158 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops, 3159 zplprops, is_ci); 3160 dmu_objset_rele(os, FTAG); 3161 return (error); 3162 } 3163 3164 static int 3165 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, 3166 nvlist_t *zplprops, boolean_t *is_ci) 3167 { 3168 boolean_t fuids_ok; 3169 boolean_t sa_ok; 3170 uint64_t zplver = ZPL_VERSION; 3171 int error; 3172 3173 zplver = zfs_zpl_version_map(spa_vers); 3174 fuids_ok = (zplver >= ZPL_VERSION_FUID); 3175 sa_ok = (zplver >= ZPL_VERSION_SA); 3176 3177 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok, 3178 createprops, zplprops, is_ci); 3179 return (error); 3180 } 3181 3182 /* 3183 * innvl: { 3184 * "type" -> dmu_objset_type_t (int32) 3185 * (optional) "props" -> { prop -> value } 3186 * } 3187 * 3188 * outnvl: propname -> error code (int32) 3189 */ 3190 static int 3191 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3192 { 3193 int error = 0; 3194 zfs_creat_t zct = { 0 }; 3195 nvlist_t *nvprops = NULL; 3196 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 3197 int32_t type32; 3198 dmu_objset_type_t type; 3199 boolean_t is_insensitive = B_FALSE; 3200 3201 if (nvlist_lookup_int32(innvl, "type", &type32) != 0) 3202 return (SET_ERROR(EINVAL)); 3203 type = type32; 3204 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); 3205 3206 switch (type) { 3207 case DMU_OST_ZFS: 3208 cbfunc = zfs_create_cb; 3209 break; 3210 3211 case DMU_OST_ZVOL: 3212 cbfunc = zvol_create_cb; 3213 break; 3214 3215 default: 3216 cbfunc = NULL; 3217 break; 3218 } 3219 if (strchr(fsname, '@') || 3220 strchr(fsname, '%')) 3221 return (SET_ERROR(EINVAL)); 3222 3223 zct.zct_props = nvprops; 3224 3225 if (cbfunc == NULL) 3226 return (SET_ERROR(EINVAL)); 3227 3228 if (type == DMU_OST_ZVOL) { 3229 uint64_t volsize, volblocksize; 3230 3231 if (nvprops == NULL) 3232 return (SET_ERROR(EINVAL)); 3233 if (nvlist_lookup_uint64(nvprops, 3234 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0) 3235 return (SET_ERROR(EINVAL)); 3236 3237 if ((error = nvlist_lookup_uint64(nvprops, 3238 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3239 &volblocksize)) != 0 && error != ENOENT) 3240 return (SET_ERROR(EINVAL)); 3241 3242 if (error != 0) 3243 volblocksize = zfs_prop_default_numeric( 3244 ZFS_PROP_VOLBLOCKSIZE); 3245 3246 if ((error = zvol_check_volblocksize( 3247 volblocksize)) != 0 || 3248 (error = zvol_check_volsize(volsize, 3249 volblocksize)) != 0) 3250 return (error); 3251 } else if (type == DMU_OST_ZFS) { 3252 int error; 3253 3254 /* 3255 * We have to have normalization and 3256 * case-folding flags correct when we do the 3257 * file system creation, so go figure them out 3258 * now. 3259 */ 3260 VERIFY(nvlist_alloc(&zct.zct_zplprops, 3261 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3262 error = zfs_fill_zplprops(fsname, nvprops, 3263 zct.zct_zplprops, &is_insensitive); 3264 if (error != 0) { 3265 nvlist_free(zct.zct_zplprops); 3266 return (error); 3267 } 3268 } 3269 3270 error = dmu_objset_create(fsname, type, 3271 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); 3272 nvlist_free(zct.zct_zplprops); 3273 3274 /* 3275 * It would be nice to do this atomically. 3276 */ 3277 if (error == 0) { 3278 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3279 nvprops, outnvl); 3280 if (error != 0) 3281 (void) dsl_destroy_head(fsname); 3282 } 3283 return (error); 3284 } 3285 3286 /* 3287 * innvl: { 3288 * "origin" -> name of origin snapshot 3289 * (optional) "props" -> { prop -> value } 3290 * } 3291 * 3292 * outnvl: propname -> error code (int32) 3293 */ 3294 static int 3295 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3296 { 3297 int error = 0; 3298 nvlist_t *nvprops = NULL; 3299 char *origin_name; 3300 3301 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0) 3302 return (SET_ERROR(EINVAL)); 3303 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); 3304 3305 if (strchr(fsname, '@') || 3306 strchr(fsname, '%')) 3307 return (SET_ERROR(EINVAL)); 3308 3309 if (dataset_namecheck(origin_name, NULL, NULL) != 0) 3310 return (SET_ERROR(EINVAL)); 3311 error = dmu_objset_clone(fsname, origin_name); 3312 if (error != 0) 3313 return (error); 3314 3315 /* 3316 * It would be nice to do this atomically. 3317 */ 3318 if (error == 0) { 3319 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3320 nvprops, outnvl); 3321 if (error != 0) 3322 (void) dsl_destroy_head(fsname); 3323 } 3324 return (error); 3325 } 3326 3327 /* 3328 * innvl: { 3329 * "snaps" -> { snapshot1, snapshot2 } 3330 * (optional) "props" -> { prop -> value (string) } 3331 * } 3332 * 3333 * outnvl: snapshot -> error code (int32) 3334 */ 3335 static int 3336 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3337 { 3338 nvlist_t *snaps; 3339 nvlist_t *props = NULL; 3340 int error, poollen; 3341 nvpair_t *pair; 3342 3343 (void) nvlist_lookup_nvlist(innvl, "props", &props); 3344 if ((error = zfs_check_userprops(poolname, props)) != 0) 3345 return (error); 3346 3347 if (!nvlist_empty(props) && 3348 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS)) 3349 return (SET_ERROR(ENOTSUP)); 3350 3351 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3352 return (SET_ERROR(EINVAL)); 3353 poollen = strlen(poolname); 3354 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3355 pair = nvlist_next_nvpair(snaps, pair)) { 3356 const char *name = nvpair_name(pair); 3357 const char *cp = strchr(name, '@'); 3358 3359 /* 3360 * The snap name must contain an @, and the part after it must 3361 * contain only valid characters. 3362 */ 3363 if (cp == NULL || 3364 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3365 return (SET_ERROR(EINVAL)); 3366 3367 /* 3368 * The snap must be in the specified pool. 3369 */ 3370 if (strncmp(name, poolname, poollen) != 0 || 3371 (name[poollen] != '/' && name[poollen] != '@')) 3372 return (SET_ERROR(EXDEV)); 3373 3374 /* This must be the only snap of this fs. */ 3375 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair); 3376 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) { 3377 if (strncmp(name, nvpair_name(pair2), cp - name + 1) 3378 == 0) { 3379 return (SET_ERROR(EXDEV)); 3380 } 3381 } 3382 } 3383 3384 error = dsl_dataset_snapshot(snaps, props, outnvl); 3385 return (error); 3386 } 3387 3388 /* 3389 * innvl: "message" -> string 3390 */ 3391 /* ARGSUSED */ 3392 static int 3393 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl) 3394 { 3395 char *message; 3396 spa_t *spa; 3397 int error; 3398 char *poolname; 3399 3400 /* 3401 * The poolname in the ioctl is not set, we get it from the TSD, 3402 * which was set at the end of the last successful ioctl that allows 3403 * logging. The secpolicy func already checked that it is set. 3404 * Only one log ioctl is allowed after each successful ioctl, so 3405 * we clear the TSD here. 3406 */ 3407 poolname = tsd_get(zfs_allow_log_key); 3408 (void) tsd_set(zfs_allow_log_key, NULL); 3409 error = spa_open(poolname, &spa, FTAG); 3410 strfree(poolname); 3411 if (error != 0) 3412 return (error); 3413 3414 if (nvlist_lookup_string(innvl, "message", &message) != 0) { 3415 spa_close(spa, FTAG); 3416 return (SET_ERROR(EINVAL)); 3417 } 3418 3419 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 3420 spa_close(spa, FTAG); 3421 return (SET_ERROR(ENOTSUP)); 3422 } 3423 3424 error = spa_history_log(spa, message); 3425 spa_close(spa, FTAG); 3426 return (error); 3427 } 3428 3429 /* 3430 * The dp_config_rwlock must not be held when calling this, because the 3431 * unmount may need to write out data. 3432 * 3433 * This function is best-effort. Callers must deal gracefully if it 3434 * remains mounted (or is remounted after this call). 3435 * 3436 * Returns 0 if the argument is not a snapshot, or it is not currently a 3437 * filesystem, or we were able to unmount it. Returns error code otherwise. 3438 */ 3439 int 3440 zfs_unmount_snap(const char *snapname) 3441 { 3442 vfs_t *vfsp; 3443 zfsvfs_t *zfsvfs; 3444 int err; 3445 3446 if (strchr(snapname, '@') == NULL) 3447 return (0); 3448 3449 vfsp = zfs_get_vfs(snapname); 3450 if (vfsp == NULL) 3451 return (0); 3452 3453 zfsvfs = vfsp->vfs_data; 3454 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os))); 3455 3456 err = vn_vfswlock(vfsp->vfs_vnodecovered); 3457 VFS_RELE(vfsp); 3458 if (err != 0) 3459 return (SET_ERROR(err)); 3460 3461 /* 3462 * Always force the unmount for snapshots. 3463 */ 3464 (void) dounmount(vfsp, MS_FORCE, kcred); 3465 return (0); 3466 } 3467 3468 /* ARGSUSED */ 3469 static int 3470 zfs_unmount_snap_cb(const char *snapname, void *arg) 3471 { 3472 return (zfs_unmount_snap(snapname)); 3473 } 3474 3475 /* 3476 * When a clone is destroyed, its origin may also need to be destroyed, 3477 * in which case it must be unmounted. This routine will do that unmount 3478 * if necessary. 3479 */ 3480 void 3481 zfs_destroy_unmount_origin(const char *fsname) 3482 { 3483 int error; 3484 objset_t *os; 3485 dsl_dataset_t *ds; 3486 3487 error = dmu_objset_hold(fsname, FTAG, &os); 3488 if (error != 0) 3489 return; 3490 ds = dmu_objset_ds(os); 3491 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) { 3492 char originname[MAXNAMELEN]; 3493 dsl_dataset_name(ds->ds_prev, originname); 3494 dmu_objset_rele(os, FTAG); 3495 (void) zfs_unmount_snap(originname); 3496 } else { 3497 dmu_objset_rele(os, FTAG); 3498 } 3499 } 3500 3501 /* 3502 * innvl: { 3503 * "snaps" -> { snapshot1, snapshot2 } 3504 * (optional boolean) "defer" 3505 * } 3506 * 3507 * outnvl: snapshot -> error code (int32) 3508 * 3509 */ 3510 /* ARGSUSED */ 3511 static int 3512 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3513 { 3514 nvlist_t *snaps; 3515 nvpair_t *pair; 3516 boolean_t defer; 3517 3518 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3519 return (SET_ERROR(EINVAL)); 3520 defer = nvlist_exists(innvl, "defer"); 3521 3522 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3523 pair = nvlist_next_nvpair(snaps, pair)) { 3524 (void) zfs_unmount_snap(nvpair_name(pair)); 3525 } 3526 3527 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl)); 3528 } 3529 3530 /* 3531 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>. 3532 * All bookmarks must be in the same pool. 3533 * 3534 * innvl: { 3535 * bookmark1 -> snapshot1, bookmark2 -> snapshot2 3536 * } 3537 * 3538 * outnvl: bookmark -> error code (int32) 3539 * 3540 */ 3541 /* ARGSUSED */ 3542 static int 3543 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3544 { 3545 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3546 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3547 char *snap_name; 3548 3549 /* 3550 * Verify the snapshot argument. 3551 */ 3552 if (nvpair_value_string(pair, &snap_name) != 0) 3553 return (SET_ERROR(EINVAL)); 3554 3555 3556 /* Verify that the keys (bookmarks) are unique */ 3557 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair); 3558 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) { 3559 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0) 3560 return (SET_ERROR(EINVAL)); 3561 } 3562 } 3563 3564 return (dsl_bookmark_create(innvl, outnvl)); 3565 } 3566 3567 /* 3568 * innvl: { 3569 * property 1, property 2, ... 3570 * } 3571 * 3572 * outnvl: { 3573 * bookmark name 1 -> { property 1, property 2, ... }, 3574 * bookmark name 2 -> { property 1, property 2, ... } 3575 * } 3576 * 3577 */ 3578 static int 3579 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3580 { 3581 return (dsl_get_bookmarks(fsname, innvl, outnvl)); 3582 } 3583 3584 /* 3585 * innvl: { 3586 * bookmark name 1, bookmark name 2 3587 * } 3588 * 3589 * outnvl: bookmark -> error code (int32) 3590 * 3591 */ 3592 static int 3593 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl, 3594 nvlist_t *outnvl) 3595 { 3596 int error, poollen; 3597 3598 poollen = strlen(poolname); 3599 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3600 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3601 const char *name = nvpair_name(pair); 3602 const char *cp = strchr(name, '#'); 3603 3604 /* 3605 * The bookmark name must contain an #, and the part after it 3606 * must contain only valid characters. 3607 */ 3608 if (cp == NULL || 3609 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3610 return (SET_ERROR(EINVAL)); 3611 3612 /* 3613 * The bookmark must be in the specified pool. 3614 */ 3615 if (strncmp(name, poolname, poollen) != 0 || 3616 (name[poollen] != '/' && name[poollen] != '#')) 3617 return (SET_ERROR(EXDEV)); 3618 } 3619 3620 error = dsl_bookmark_destroy(innvl, outnvl); 3621 return (error); 3622 } 3623 3624 /* 3625 * inputs: 3626 * zc_name name of dataset to destroy 3627 * zc_objset_type type of objset 3628 * zc_defer_destroy mark for deferred destroy 3629 * 3630 * outputs: none 3631 */ 3632 static int 3633 zfs_ioc_destroy(zfs_cmd_t *zc) 3634 { 3635 int err; 3636 3637 if (zc->zc_objset_type == DMU_OST_ZFS) { 3638 err = zfs_unmount_snap(zc->zc_name); 3639 if (err != 0) 3640 return (err); 3641 } 3642 3643 if (strchr(zc->zc_name, '@')) 3644 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy); 3645 else 3646 err = dsl_destroy_head(zc->zc_name); 3647 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 3648 (void) zvol_remove_minor(zc->zc_name); 3649 return (err); 3650 } 3651 3652 /* 3653 * fsname is name of dataset to rollback (to most recent snapshot) 3654 * 3655 * innvl is not used. 3656 * 3657 * outnvl: "target" -> name of most recent snapshot 3658 * } 3659 */ 3660 /* ARGSUSED */ 3661 static int 3662 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl) 3663 { 3664 zfsvfs_t *zfsvfs; 3665 int error; 3666 3667 if (getzfsvfs(fsname, &zfsvfs) == 0) { 3668 error = zfs_suspend_fs(zfsvfs); 3669 if (error == 0) { 3670 int resume_err; 3671 3672 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl); 3673 resume_err = zfs_resume_fs(zfsvfs, fsname); 3674 error = error ? error : resume_err; 3675 } 3676 VFS_RELE(zfsvfs->z_vfs); 3677 } else { 3678 error = dsl_dataset_rollback(fsname, NULL, outnvl); 3679 } 3680 return (error); 3681 } 3682 3683 static int 3684 recursive_unmount(const char *fsname, void *arg) 3685 { 3686 const char *snapname = arg; 3687 char fullname[MAXNAMELEN]; 3688 3689 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname); 3690 return (zfs_unmount_snap(fullname)); 3691 } 3692 3693 /* 3694 * inputs: 3695 * zc_name old name of dataset 3696 * zc_value new name of dataset 3697 * zc_cookie recursive flag (only valid for snapshots) 3698 * 3699 * outputs: none 3700 */ 3701 static int 3702 zfs_ioc_rename(zfs_cmd_t *zc) 3703 { 3704 boolean_t recursive = zc->zc_cookie & 1; 3705 char *at; 3706 3707 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3708 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3709 strchr(zc->zc_value, '%')) 3710 return (SET_ERROR(EINVAL)); 3711 3712 at = strchr(zc->zc_name, '@'); 3713 if (at != NULL) { 3714 /* snaps must be in same fs */ 3715 int error; 3716 3717 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1)) 3718 return (SET_ERROR(EXDEV)); 3719 *at = '\0'; 3720 if (zc->zc_objset_type == DMU_OST_ZFS) { 3721 error = dmu_objset_find(zc->zc_name, 3722 recursive_unmount, at + 1, 3723 recursive ? DS_FIND_CHILDREN : 0); 3724 if (error != 0) { 3725 *at = '@'; 3726 return (error); 3727 } 3728 } 3729 error = dsl_dataset_rename_snapshot(zc->zc_name, 3730 at + 1, strchr(zc->zc_value, '@') + 1, recursive); 3731 *at = '@'; 3732 3733 return (error); 3734 } else { 3735 if (zc->zc_objset_type == DMU_OST_ZVOL) 3736 (void) zvol_remove_minor(zc->zc_name); 3737 return (dsl_dir_rename(zc->zc_name, zc->zc_value)); 3738 } 3739 } 3740 3741 static int 3742 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3743 { 3744 const char *propname = nvpair_name(pair); 3745 boolean_t issnap = (strchr(dsname, '@') != NULL); 3746 zfs_prop_t prop = zfs_name_to_prop(propname); 3747 uint64_t intval; 3748 int err; 3749 3750 if (prop == ZPROP_INVAL) { 3751 if (zfs_prop_user(propname)) { 3752 if (err = zfs_secpolicy_write_perms(dsname, 3753 ZFS_DELEG_PERM_USERPROP, cr)) 3754 return (err); 3755 return (0); 3756 } 3757 3758 if (!issnap && zfs_prop_userquota(propname)) { 3759 const char *perm = NULL; 3760 const char *uq_prefix = 3761 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3762 const char *gq_prefix = 3763 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3764 3765 if (strncmp(propname, uq_prefix, 3766 strlen(uq_prefix)) == 0) { 3767 perm = ZFS_DELEG_PERM_USERQUOTA; 3768 } else if (strncmp(propname, gq_prefix, 3769 strlen(gq_prefix)) == 0) { 3770 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3771 } else { 3772 /* USERUSED and GROUPUSED are read-only */ 3773 return (SET_ERROR(EINVAL)); 3774 } 3775 3776 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3777 return (err); 3778 return (0); 3779 } 3780 3781 return (SET_ERROR(EINVAL)); 3782 } 3783 3784 if (issnap) 3785 return (SET_ERROR(EINVAL)); 3786 3787 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3788 /* 3789 * dsl_prop_get_all_impl() returns properties in this 3790 * format. 3791 */ 3792 nvlist_t *attrs; 3793 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3794 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3795 &pair) == 0); 3796 } 3797 3798 /* 3799 * Check that this value is valid for this pool version 3800 */ 3801 switch (prop) { 3802 case ZFS_PROP_COMPRESSION: 3803 /* 3804 * If the user specified gzip compression, make sure 3805 * the SPA supports it. We ignore any errors here since 3806 * we'll catch them later. 3807 */ 3808 if (nvpair_value_uint64(pair, &intval) == 0) { 3809 if (intval >= ZIO_COMPRESS_GZIP_1 && 3810 intval <= ZIO_COMPRESS_GZIP_9 && 3811 zfs_earlier_version(dsname, 3812 SPA_VERSION_GZIP_COMPRESSION)) { 3813 return (SET_ERROR(ENOTSUP)); 3814 } 3815 3816 if (intval == ZIO_COMPRESS_ZLE && 3817 zfs_earlier_version(dsname, 3818 SPA_VERSION_ZLE_COMPRESSION)) 3819 return (SET_ERROR(ENOTSUP)); 3820 3821 if (intval == ZIO_COMPRESS_LZ4) { 3822 spa_t *spa; 3823 3824 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3825 return (err); 3826 3827 if (!spa_feature_is_enabled(spa, 3828 SPA_FEATURE_LZ4_COMPRESS)) { 3829 spa_close(spa, FTAG); 3830 return (SET_ERROR(ENOTSUP)); 3831 } 3832 spa_close(spa, FTAG); 3833 } 3834 3835 /* 3836 * If this is a bootable dataset then 3837 * verify that the compression algorithm 3838 * is supported for booting. We must return 3839 * something other than ENOTSUP since it 3840 * implies a downrev pool version. 3841 */ 3842 if (zfs_is_bootfs(dsname) && 3843 !BOOTFS_COMPRESS_VALID(intval)) { 3844 return (SET_ERROR(ERANGE)); 3845 } 3846 } 3847 break; 3848 3849 case ZFS_PROP_COPIES: 3850 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3851 return (SET_ERROR(ENOTSUP)); 3852 break; 3853 3854 case ZFS_PROP_RECORDSIZE: 3855 /* Record sizes above 128k need the feature to be enabled */ 3856 if (nvpair_value_uint64(pair, &intval) == 0 && 3857 intval > SPA_OLD_MAXBLOCKSIZE) { 3858 spa_t *spa; 3859 3860 /* 3861 * If this is a bootable dataset then 3862 * the we don't allow large (>128K) blocks, 3863 * because GRUB doesn't support them. 3864 */ 3865 if (zfs_is_bootfs(dsname) && 3866 intval > SPA_OLD_MAXBLOCKSIZE) { 3867 return (SET_ERROR(ERANGE)); 3868 } 3869 3870 /* 3871 * We don't allow setting the property above 1MB, 3872 * unless the tunable has been changed. 3873 */ 3874 if (intval > zfs_max_recordsize || 3875 intval > SPA_MAXBLOCKSIZE) 3876 return (SET_ERROR(ERANGE)); 3877 3878 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3879 return (err); 3880 3881 if (!spa_feature_is_enabled(spa, 3882 SPA_FEATURE_LARGE_BLOCKS)) { 3883 spa_close(spa, FTAG); 3884 return (SET_ERROR(ENOTSUP)); 3885 } 3886 spa_close(spa, FTAG); 3887 } 3888 break; 3889 3890 case ZFS_PROP_SHARESMB: 3891 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3892 return (SET_ERROR(ENOTSUP)); 3893 break; 3894 3895 case ZFS_PROP_ACLINHERIT: 3896 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3897 nvpair_value_uint64(pair, &intval) == 0) { 3898 if (intval == ZFS_ACL_PASSTHROUGH_X && 3899 zfs_earlier_version(dsname, 3900 SPA_VERSION_PASSTHROUGH_X)) 3901 return (SET_ERROR(ENOTSUP)); 3902 } 3903 break; 3904 3905 case ZFS_PROP_CHECKSUM: 3906 case ZFS_PROP_DEDUP: 3907 { 3908 spa_feature_t feature; 3909 spa_t *spa; 3910 3911 /* dedup feature version checks */ 3912 if (prop == ZFS_PROP_DEDUP && 3913 zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3914 return (SET_ERROR(ENOTSUP)); 3915 3916 if (nvpair_value_uint64(pair, &intval) != 0) 3917 return (SET_ERROR(EINVAL)); 3918 3919 /* check prop value is enabled in features */ 3920 feature = zio_checksum_to_feature(intval & ZIO_CHECKSUM_MASK); 3921 if (feature == SPA_FEATURE_NONE) 3922 break; 3923 3924 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3925 return (err); 3926 /* 3927 * Salted checksums are not supported on root pools. 3928 */ 3929 if (spa_bootfs(spa) != 0 && 3930 intval < ZIO_CHECKSUM_FUNCTIONS && 3931 (zio_checksum_table[intval].ci_flags & 3932 ZCHECKSUM_FLAG_SALTED)) { 3933 spa_close(spa, FTAG); 3934 return (SET_ERROR(ERANGE)); 3935 } 3936 if (!spa_feature_is_enabled(spa, feature)) { 3937 spa_close(spa, FTAG); 3938 return (SET_ERROR(ENOTSUP)); 3939 } 3940 spa_close(spa, FTAG); 3941 break; 3942 } 3943 } 3944 3945 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3946 } 3947 3948 /* 3949 * Checks for a race condition to make sure we don't increment a feature flag 3950 * multiple times. 3951 */ 3952 static int 3953 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx) 3954 { 3955 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3956 spa_feature_t *featurep = arg; 3957 3958 if (!spa_feature_is_active(spa, *featurep)) 3959 return (0); 3960 else 3961 return (SET_ERROR(EBUSY)); 3962 } 3963 3964 /* 3965 * The callback invoked on feature activation in the sync task caused by 3966 * zfs_prop_activate_feature. 3967 */ 3968 static void 3969 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx) 3970 { 3971 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3972 spa_feature_t *featurep = arg; 3973 3974 spa_feature_incr(spa, *featurep, tx); 3975 } 3976 3977 /* 3978 * Activates a feature on a pool in response to a property setting. This 3979 * creates a new sync task which modifies the pool to reflect the feature 3980 * as being active. 3981 */ 3982 static int 3983 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature) 3984 { 3985 int err; 3986 3987 /* EBUSY here indicates that the feature is already active */ 3988 err = dsl_sync_task(spa_name(spa), 3989 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync, 3990 &feature, 2, ZFS_SPACE_CHECK_RESERVED); 3991 3992 if (err != 0 && err != EBUSY) 3993 return (err); 3994 else 3995 return (0); 3996 } 3997 3998 /* 3999 * Removes properties from the given props list that fail permission checks 4000 * needed to clear them and to restore them in case of a receive error. For each 4001 * property, make sure we have both set and inherit permissions. 4002 * 4003 * Returns the first error encountered if any permission checks fail. If the 4004 * caller provides a non-NULL errlist, it also gives the complete list of names 4005 * of all the properties that failed a permission check along with the 4006 * corresponding error numbers. The caller is responsible for freeing the 4007 * returned errlist. 4008 * 4009 * If every property checks out successfully, zero is returned and the list 4010 * pointed at by errlist is NULL. 4011 */ 4012 static int 4013 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 4014 { 4015 zfs_cmd_t *zc; 4016 nvpair_t *pair, *next_pair; 4017 nvlist_t *errors; 4018 int err, rv = 0; 4019 4020 if (props == NULL) 4021 return (0); 4022 4023 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4024 4025 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 4026 (void) strcpy(zc->zc_name, dataset); 4027 pair = nvlist_next_nvpair(props, NULL); 4028 while (pair != NULL) { 4029 next_pair = nvlist_next_nvpair(props, pair); 4030 4031 (void) strcpy(zc->zc_value, nvpair_name(pair)); 4032 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 4033 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) { 4034 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 4035 VERIFY(nvlist_add_int32(errors, 4036 zc->zc_value, err) == 0); 4037 } 4038 pair = next_pair; 4039 } 4040 kmem_free(zc, sizeof (zfs_cmd_t)); 4041 4042 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 4043 nvlist_free(errors); 4044 errors = NULL; 4045 } else { 4046 VERIFY(nvpair_value_int32(pair, &rv) == 0); 4047 } 4048 4049 if (errlist == NULL) 4050 nvlist_free(errors); 4051 else 4052 *errlist = errors; 4053 4054 return (rv); 4055 } 4056 4057 static boolean_t 4058 propval_equals(nvpair_t *p1, nvpair_t *p2) 4059 { 4060 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 4061 /* dsl_prop_get_all_impl() format */ 4062 nvlist_t *attrs; 4063 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 4064 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4065 &p1) == 0); 4066 } 4067 4068 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 4069 nvlist_t *attrs; 4070 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 4071 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4072 &p2) == 0); 4073 } 4074 4075 if (nvpair_type(p1) != nvpair_type(p2)) 4076 return (B_FALSE); 4077 4078 if (nvpair_type(p1) == DATA_TYPE_STRING) { 4079 char *valstr1, *valstr2; 4080 4081 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 4082 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 4083 return (strcmp(valstr1, valstr2) == 0); 4084 } else { 4085 uint64_t intval1, intval2; 4086 4087 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 4088 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 4089 return (intval1 == intval2); 4090 } 4091 } 4092 4093 /* 4094 * Remove properties from props if they are not going to change (as determined 4095 * by comparison with origprops). Remove them from origprops as well, since we 4096 * do not need to clear or restore properties that won't change. 4097 */ 4098 static void 4099 props_reduce(nvlist_t *props, nvlist_t *origprops) 4100 { 4101 nvpair_t *pair, *next_pair; 4102 4103 if (origprops == NULL) 4104 return; /* all props need to be received */ 4105 4106 pair = nvlist_next_nvpair(props, NULL); 4107 while (pair != NULL) { 4108 const char *propname = nvpair_name(pair); 4109 nvpair_t *match; 4110 4111 next_pair = nvlist_next_nvpair(props, pair); 4112 4113 if ((nvlist_lookup_nvpair(origprops, propname, 4114 &match) != 0) || !propval_equals(pair, match)) 4115 goto next; /* need to set received value */ 4116 4117 /* don't clear the existing received value */ 4118 (void) nvlist_remove_nvpair(origprops, match); 4119 /* don't bother receiving the property */ 4120 (void) nvlist_remove_nvpair(props, pair); 4121 next: 4122 pair = next_pair; 4123 } 4124 } 4125 4126 /* 4127 * Extract properties that cannot be set PRIOR to the receipt of a dataset. 4128 * For example, refquota cannot be set until after the receipt of a dataset, 4129 * because in replication streams, an older/earlier snapshot may exceed the 4130 * refquota. We want to receive the older/earlier snapshot, but setting 4131 * refquota pre-receipt will set the dsl's ACTUAL quota, which will prevent 4132 * the older/earlier snapshot from being received (with EDQUOT). 4133 * 4134 * The ZFS test "zfs_receive_011_pos" demonstrates such a scenario. 4135 * 4136 * libzfs will need to be judicious handling errors encountered by props 4137 * extracted by this function. 4138 */ 4139 static nvlist_t * 4140 extract_delay_props(nvlist_t *props) 4141 { 4142 nvlist_t *delayprops; 4143 nvpair_t *nvp, *tmp; 4144 static const zfs_prop_t delayable[] = { ZFS_PROP_REFQUOTA, 0 }; 4145 int i; 4146 4147 VERIFY(nvlist_alloc(&delayprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4148 4149 for (nvp = nvlist_next_nvpair(props, NULL); nvp != NULL; 4150 nvp = nvlist_next_nvpair(props, nvp)) { 4151 /* 4152 * strcmp() is safe because zfs_prop_to_name() always returns 4153 * a bounded string. 4154 */ 4155 for (i = 0; delayable[i] != 0; i++) { 4156 if (strcmp(zfs_prop_to_name(delayable[i]), 4157 nvpair_name(nvp)) == 0) { 4158 break; 4159 } 4160 } 4161 if (delayable[i] != 0) { 4162 tmp = nvlist_prev_nvpair(props, nvp); 4163 VERIFY(nvlist_add_nvpair(delayprops, nvp) == 0); 4164 VERIFY(nvlist_remove_nvpair(props, nvp) == 0); 4165 nvp = tmp; 4166 } 4167 } 4168 4169 if (nvlist_empty(delayprops)) { 4170 nvlist_free(delayprops); 4171 delayprops = NULL; 4172 } 4173 return (delayprops); 4174 } 4175 4176 #ifdef DEBUG 4177 static boolean_t zfs_ioc_recv_inject_err; 4178 #endif 4179 4180 /* 4181 * inputs: 4182 * zc_name name of containing filesystem 4183 * zc_nvlist_src{_size} nvlist of properties to apply 4184 * zc_value name of snapshot to create 4185 * zc_string name of clone origin (if DRR_FLAG_CLONE) 4186 * zc_cookie file descriptor to recv from 4187 * zc_begin_record the BEGIN record of the stream (not byteswapped) 4188 * zc_guid force flag 4189 * zc_cleanup_fd cleanup-on-exit file descriptor 4190 * zc_action_handle handle for this guid/ds mapping (or zero on first call) 4191 * zc_resumable if data is incomplete assume sender will resume 4192 * 4193 * outputs: 4194 * zc_cookie number of bytes read 4195 * zc_nvlist_dst{_size} error for each unapplied received property 4196 * zc_obj zprop_errflags_t 4197 * zc_action_handle handle for this guid/ds mapping 4198 */ 4199 static int 4200 zfs_ioc_recv(zfs_cmd_t *zc) 4201 { 4202 file_t *fp; 4203 dmu_recv_cookie_t drc; 4204 boolean_t force = (boolean_t)zc->zc_guid; 4205 int fd; 4206 int error = 0; 4207 int props_error = 0; 4208 nvlist_t *errors; 4209 offset_t off; 4210 nvlist_t *props = NULL; /* sent properties */ 4211 nvlist_t *origprops = NULL; /* existing properties */ 4212 nvlist_t *delayprops = NULL; /* sent properties applied post-receive */ 4213 char *origin = NULL; 4214 char *tosnap; 4215 char tofs[ZFS_MAXNAMELEN]; 4216 boolean_t first_recvd_props = B_FALSE; 4217 4218 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 4219 strchr(zc->zc_value, '@') == NULL || 4220 strchr(zc->zc_value, '%')) 4221 return (SET_ERROR(EINVAL)); 4222 4223 (void) strcpy(tofs, zc->zc_value); 4224 tosnap = strchr(tofs, '@'); 4225 *tosnap++ = '\0'; 4226 4227 if (zc->zc_nvlist_src != NULL && 4228 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 4229 zc->zc_iflags, &props)) != 0) 4230 return (error); 4231 4232 fd = zc->zc_cookie; 4233 fp = getf(fd); 4234 if (fp == NULL) { 4235 nvlist_free(props); 4236 return (SET_ERROR(EBADF)); 4237 } 4238 4239 errors = fnvlist_alloc(); 4240 4241 if (zc->zc_string[0]) 4242 origin = zc->zc_string; 4243 4244 error = dmu_recv_begin(tofs, tosnap, 4245 &zc->zc_begin_record, force, zc->zc_resumable, origin, &drc); 4246 if (error != 0) 4247 goto out; 4248 4249 /* 4250 * Set properties before we receive the stream so that they are applied 4251 * to the new data. Note that we must call dmu_recv_stream() if 4252 * dmu_recv_begin() succeeds. 4253 */ 4254 if (props != NULL && !drc.drc_newfs) { 4255 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >= 4256 SPA_VERSION_RECVD_PROPS && 4257 !dsl_prop_get_hasrecvd(tofs)) 4258 first_recvd_props = B_TRUE; 4259 4260 /* 4261 * If new received properties are supplied, they are to 4262 * completely replace the existing received properties, so stash 4263 * away the existing ones. 4264 */ 4265 if (dsl_prop_get_received(tofs, &origprops) == 0) { 4266 nvlist_t *errlist = NULL; 4267 /* 4268 * Don't bother writing a property if its value won't 4269 * change (and avoid the unnecessary security checks). 4270 * 4271 * The first receive after SPA_VERSION_RECVD_PROPS is a 4272 * special case where we blow away all local properties 4273 * regardless. 4274 */ 4275 if (!first_recvd_props) 4276 props_reduce(props, origprops); 4277 if (zfs_check_clearable(tofs, origprops, &errlist) != 0) 4278 (void) nvlist_merge(errors, errlist, 0); 4279 nvlist_free(errlist); 4280 4281 if (clear_received_props(tofs, origprops, 4282 first_recvd_props ? NULL : props) != 0) 4283 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4284 } else { 4285 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4286 } 4287 } 4288 4289 if (props != NULL) { 4290 props_error = dsl_prop_set_hasrecvd(tofs); 4291 4292 if (props_error == 0) { 4293 delayprops = extract_delay_props(props); 4294 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4295 props, errors); 4296 } 4297 } 4298 4299 off = fp->f_offset; 4300 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd, 4301 &zc->zc_action_handle); 4302 4303 if (error == 0) { 4304 zfsvfs_t *zfsvfs = NULL; 4305 4306 if (getzfsvfs(tofs, &zfsvfs) == 0) { 4307 /* online recv */ 4308 int end_err; 4309 4310 error = zfs_suspend_fs(zfsvfs); 4311 /* 4312 * If the suspend fails, then the recv_end will 4313 * likely also fail, and clean up after itself. 4314 */ 4315 end_err = dmu_recv_end(&drc, zfsvfs); 4316 if (error == 0) 4317 error = zfs_resume_fs(zfsvfs, tofs); 4318 error = error ? error : end_err; 4319 VFS_RELE(zfsvfs->z_vfs); 4320 } else { 4321 error = dmu_recv_end(&drc, NULL); 4322 } 4323 4324 /* Set delayed properties now, after we're done receiving. */ 4325 if (delayprops != NULL && error == 0) { 4326 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4327 delayprops, errors); 4328 } 4329 } 4330 4331 if (delayprops != NULL) { 4332 /* 4333 * Merge delayed props back in with initial props, in case 4334 * we're DEBUG and zfs_ioc_recv_inject_err is set (which means 4335 * we have to make sure clear_received_props() includes 4336 * the delayed properties). 4337 * 4338 * Since zfs_ioc_recv_inject_err is only in DEBUG kernels, 4339 * using ASSERT() will be just like a VERIFY. 4340 */ 4341 ASSERT(nvlist_merge(props, delayprops, 0) == 0); 4342 nvlist_free(delayprops); 4343 } 4344 4345 /* 4346 * Now that all props, initial and delayed, are set, report the prop 4347 * errors to the caller. 4348 */ 4349 if (zc->zc_nvlist_dst_size != 0 && 4350 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 || 4351 put_nvlist(zc, errors) != 0)) { 4352 /* 4353 * Caller made zc->zc_nvlist_dst less than the minimum expected 4354 * size or supplied an invalid address. 4355 */ 4356 props_error = SET_ERROR(EINVAL); 4357 } 4358 4359 zc->zc_cookie = off - fp->f_offset; 4360 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4361 fp->f_offset = off; 4362 4363 #ifdef DEBUG 4364 if (zfs_ioc_recv_inject_err) { 4365 zfs_ioc_recv_inject_err = B_FALSE; 4366 error = 1; 4367 } 4368 #endif 4369 /* 4370 * On error, restore the original props. 4371 */ 4372 if (error != 0 && props != NULL && !drc.drc_newfs) { 4373 if (clear_received_props(tofs, props, NULL) != 0) { 4374 /* 4375 * We failed to clear the received properties. 4376 * Since we may have left a $recvd value on the 4377 * system, we can't clear the $hasrecvd flag. 4378 */ 4379 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4380 } else if (first_recvd_props) { 4381 dsl_prop_unset_hasrecvd(tofs); 4382 } 4383 4384 if (origprops == NULL && !drc.drc_newfs) { 4385 /* We failed to stash the original properties. */ 4386 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4387 } 4388 4389 /* 4390 * dsl_props_set() will not convert RECEIVED to LOCAL on or 4391 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 4392 * explictly if we're restoring local properties cleared in the 4393 * first new-style receive. 4394 */ 4395 if (origprops != NULL && 4396 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 4397 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 4398 origprops, NULL) != 0) { 4399 /* 4400 * We stashed the original properties but failed to 4401 * restore them. 4402 */ 4403 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4404 } 4405 } 4406 out: 4407 nvlist_free(props); 4408 nvlist_free(origprops); 4409 nvlist_free(errors); 4410 releasef(fd); 4411 4412 if (error == 0) 4413 error = props_error; 4414 4415 return (error); 4416 } 4417 4418 /* 4419 * inputs: 4420 * zc_name name of snapshot to send 4421 * zc_cookie file descriptor to send stream to 4422 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj) 4423 * zc_sendobj objsetid of snapshot to send 4424 * zc_fromobj objsetid of incremental fromsnap (may be zero) 4425 * zc_guid if set, estimate size of stream only. zc_cookie is ignored. 4426 * output size in zc_objset_type. 4427 * zc_flags lzc_send_flags 4428 * 4429 * outputs: 4430 * zc_objset_type estimated size, if zc_guid is set 4431 */ 4432 static int 4433 zfs_ioc_send(zfs_cmd_t *zc) 4434 { 4435 int error; 4436 offset_t off; 4437 boolean_t estimate = (zc->zc_guid != 0); 4438 boolean_t embedok = (zc->zc_flags & 0x1); 4439 boolean_t large_block_ok = (zc->zc_flags & 0x2); 4440 4441 if (zc->zc_obj != 0) { 4442 dsl_pool_t *dp; 4443 dsl_dataset_t *tosnap; 4444 4445 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4446 if (error != 0) 4447 return (error); 4448 4449 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4450 if (error != 0) { 4451 dsl_pool_rele(dp, FTAG); 4452 return (error); 4453 } 4454 4455 if (dsl_dir_is_clone(tosnap->ds_dir)) 4456 zc->zc_fromobj = 4457 dsl_dir_phys(tosnap->ds_dir)->dd_origin_obj; 4458 dsl_dataset_rele(tosnap, FTAG); 4459 dsl_pool_rele(dp, FTAG); 4460 } 4461 4462 if (estimate) { 4463 dsl_pool_t *dp; 4464 dsl_dataset_t *tosnap; 4465 dsl_dataset_t *fromsnap = NULL; 4466 4467 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4468 if (error != 0) 4469 return (error); 4470 4471 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4472 if (error != 0) { 4473 dsl_pool_rele(dp, FTAG); 4474 return (error); 4475 } 4476 4477 if (zc->zc_fromobj != 0) { 4478 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, 4479 FTAG, &fromsnap); 4480 if (error != 0) { 4481 dsl_dataset_rele(tosnap, FTAG); 4482 dsl_pool_rele(dp, FTAG); 4483 return (error); 4484 } 4485 } 4486 4487 error = dmu_send_estimate(tosnap, fromsnap, 4488 &zc->zc_objset_type); 4489 4490 if (fromsnap != NULL) 4491 dsl_dataset_rele(fromsnap, FTAG); 4492 dsl_dataset_rele(tosnap, FTAG); 4493 dsl_pool_rele(dp, FTAG); 4494 } else { 4495 file_t *fp = getf(zc->zc_cookie); 4496 if (fp == NULL) 4497 return (SET_ERROR(EBADF)); 4498 4499 off = fp->f_offset; 4500 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj, 4501 zc->zc_fromobj, embedok, large_block_ok, 4502 zc->zc_cookie, fp->f_vnode, &off); 4503 4504 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4505 fp->f_offset = off; 4506 releasef(zc->zc_cookie); 4507 } 4508 return (error); 4509 } 4510 4511 /* 4512 * inputs: 4513 * zc_name name of snapshot on which to report progress 4514 * zc_cookie file descriptor of send stream 4515 * 4516 * outputs: 4517 * zc_cookie number of bytes written in send stream thus far 4518 */ 4519 static int 4520 zfs_ioc_send_progress(zfs_cmd_t *zc) 4521 { 4522 dsl_pool_t *dp; 4523 dsl_dataset_t *ds; 4524 dmu_sendarg_t *dsp = NULL; 4525 int error; 4526 4527 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4528 if (error != 0) 4529 return (error); 4530 4531 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds); 4532 if (error != 0) { 4533 dsl_pool_rele(dp, FTAG); 4534 return (error); 4535 } 4536 4537 mutex_enter(&ds->ds_sendstream_lock); 4538 4539 /* 4540 * Iterate over all the send streams currently active on this dataset. 4541 * If there's one which matches the specified file descriptor _and_ the 4542 * stream was started by the current process, return the progress of 4543 * that stream. 4544 */ 4545 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL; 4546 dsp = list_next(&ds->ds_sendstreams, dsp)) { 4547 if (dsp->dsa_outfd == zc->zc_cookie && 4548 dsp->dsa_proc == curproc) 4549 break; 4550 } 4551 4552 if (dsp != NULL) 4553 zc->zc_cookie = *(dsp->dsa_off); 4554 else 4555 error = SET_ERROR(ENOENT); 4556 4557 mutex_exit(&ds->ds_sendstream_lock); 4558 dsl_dataset_rele(ds, FTAG); 4559 dsl_pool_rele(dp, FTAG); 4560 return (error); 4561 } 4562 4563 static int 4564 zfs_ioc_inject_fault(zfs_cmd_t *zc) 4565 { 4566 int id, error; 4567 4568 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 4569 &zc->zc_inject_record); 4570 4571 if (error == 0) 4572 zc->zc_guid = (uint64_t)id; 4573 4574 return (error); 4575 } 4576 4577 static int 4578 zfs_ioc_clear_fault(zfs_cmd_t *zc) 4579 { 4580 return (zio_clear_fault((int)zc->zc_guid)); 4581 } 4582 4583 static int 4584 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 4585 { 4586 int id = (int)zc->zc_guid; 4587 int error; 4588 4589 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 4590 &zc->zc_inject_record); 4591 4592 zc->zc_guid = id; 4593 4594 return (error); 4595 } 4596 4597 static int 4598 zfs_ioc_error_log(zfs_cmd_t *zc) 4599 { 4600 spa_t *spa; 4601 int error; 4602 size_t count = (size_t)zc->zc_nvlist_dst_size; 4603 4604 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 4605 return (error); 4606 4607 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 4608 &count); 4609 if (error == 0) 4610 zc->zc_nvlist_dst_size = count; 4611 else 4612 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 4613 4614 spa_close(spa, FTAG); 4615 4616 return (error); 4617 } 4618 4619 static int 4620 zfs_ioc_clear(zfs_cmd_t *zc) 4621 { 4622 spa_t *spa; 4623 vdev_t *vd; 4624 int error; 4625 4626 /* 4627 * On zpool clear we also fix up missing slogs 4628 */ 4629 mutex_enter(&spa_namespace_lock); 4630 spa = spa_lookup(zc->zc_name); 4631 if (spa == NULL) { 4632 mutex_exit(&spa_namespace_lock); 4633 return (SET_ERROR(EIO)); 4634 } 4635 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 4636 /* we need to let spa_open/spa_load clear the chains */ 4637 spa_set_log_state(spa, SPA_LOG_CLEAR); 4638 } 4639 spa->spa_last_open_failed = 0; 4640 mutex_exit(&spa_namespace_lock); 4641 4642 if (zc->zc_cookie & ZPOOL_NO_REWIND) { 4643 error = spa_open(zc->zc_name, &spa, FTAG); 4644 } else { 4645 nvlist_t *policy; 4646 nvlist_t *config = NULL; 4647 4648 if (zc->zc_nvlist_src == NULL) 4649 return (SET_ERROR(EINVAL)); 4650 4651 if ((error = get_nvlist(zc->zc_nvlist_src, 4652 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 4653 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 4654 policy, &config); 4655 if (config != NULL) { 4656 int err; 4657 4658 if ((err = put_nvlist(zc, config)) != 0) 4659 error = err; 4660 nvlist_free(config); 4661 } 4662 nvlist_free(policy); 4663 } 4664 } 4665 4666 if (error != 0) 4667 return (error); 4668 4669 spa_vdev_state_enter(spa, SCL_NONE); 4670 4671 if (zc->zc_guid == 0) { 4672 vd = NULL; 4673 } else { 4674 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 4675 if (vd == NULL) { 4676 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 4677 spa_close(spa, FTAG); 4678 return (SET_ERROR(ENODEV)); 4679 } 4680 } 4681 4682 vdev_clear(spa, vd); 4683 4684 (void) spa_vdev_state_exit(spa, NULL, 0); 4685 4686 /* 4687 * Resume any suspended I/Os. 4688 */ 4689 if (zio_resume(spa) != 0) 4690 error = SET_ERROR(EIO); 4691 4692 spa_close(spa, FTAG); 4693 4694 return (error); 4695 } 4696 4697 static int 4698 zfs_ioc_pool_reopen(zfs_cmd_t *zc) 4699 { 4700 spa_t *spa; 4701 int error; 4702 4703 error = spa_open(zc->zc_name, &spa, FTAG); 4704 if (error != 0) 4705 return (error); 4706 4707 spa_vdev_state_enter(spa, SCL_NONE); 4708 4709 /* 4710 * If a resilver is already in progress then set the 4711 * spa_scrub_reopen flag to B_TRUE so that we don't restart 4712 * the scan as a side effect of the reopen. Otherwise, let 4713 * vdev_open() decided if a resilver is required. 4714 */ 4715 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool); 4716 vdev_reopen(spa->spa_root_vdev); 4717 spa->spa_scrub_reopen = B_FALSE; 4718 4719 (void) spa_vdev_state_exit(spa, NULL, 0); 4720 spa_close(spa, FTAG); 4721 return (0); 4722 } 4723 /* 4724 * inputs: 4725 * zc_name name of filesystem 4726 * zc_value name of origin snapshot 4727 * 4728 * outputs: 4729 * zc_string name of conflicting snapshot, if there is one 4730 */ 4731 static int 4732 zfs_ioc_promote(zfs_cmd_t *zc) 4733 { 4734 char *cp; 4735 4736 /* 4737 * We don't need to unmount *all* the origin fs's snapshots, but 4738 * it's easier. 4739 */ 4740 cp = strchr(zc->zc_value, '@'); 4741 if (cp) 4742 *cp = '\0'; 4743 (void) dmu_objset_find(zc->zc_value, 4744 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS); 4745 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 4746 } 4747 4748 /* 4749 * Retrieve a single {user|group}{used|quota}@... property. 4750 * 4751 * inputs: 4752 * zc_name name of filesystem 4753 * zc_objset_type zfs_userquota_prop_t 4754 * zc_value domain name (eg. "S-1-234-567-89") 4755 * zc_guid RID/UID/GID 4756 * 4757 * outputs: 4758 * zc_cookie property value 4759 */ 4760 static int 4761 zfs_ioc_userspace_one(zfs_cmd_t *zc) 4762 { 4763 zfsvfs_t *zfsvfs; 4764 int error; 4765 4766 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 4767 return (SET_ERROR(EINVAL)); 4768 4769 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4770 if (error != 0) 4771 return (error); 4772 4773 error = zfs_userspace_one(zfsvfs, 4774 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 4775 zfsvfs_rele(zfsvfs, FTAG); 4776 4777 return (error); 4778 } 4779 4780 /* 4781 * inputs: 4782 * zc_name name of filesystem 4783 * zc_cookie zap cursor 4784 * zc_objset_type zfs_userquota_prop_t 4785 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 4786 * 4787 * outputs: 4788 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 4789 * zc_cookie zap cursor 4790 */ 4791 static int 4792 zfs_ioc_userspace_many(zfs_cmd_t *zc) 4793 { 4794 zfsvfs_t *zfsvfs; 4795 int bufsize = zc->zc_nvlist_dst_size; 4796 4797 if (bufsize <= 0) 4798 return (SET_ERROR(ENOMEM)); 4799 4800 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4801 if (error != 0) 4802 return (error); 4803 4804 void *buf = kmem_alloc(bufsize, KM_SLEEP); 4805 4806 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 4807 buf, &zc->zc_nvlist_dst_size); 4808 4809 if (error == 0) { 4810 error = xcopyout(buf, 4811 (void *)(uintptr_t)zc->zc_nvlist_dst, 4812 zc->zc_nvlist_dst_size); 4813 } 4814 kmem_free(buf, bufsize); 4815 zfsvfs_rele(zfsvfs, FTAG); 4816 4817 return (error); 4818 } 4819 4820 /* 4821 * inputs: 4822 * zc_name name of filesystem 4823 * 4824 * outputs: 4825 * none 4826 */ 4827 static int 4828 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 4829 { 4830 objset_t *os; 4831 int error = 0; 4832 zfsvfs_t *zfsvfs; 4833 4834 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 4835 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 4836 /* 4837 * If userused is not enabled, it may be because the 4838 * objset needs to be closed & reopened (to grow the 4839 * objset_phys_t). Suspend/resume the fs will do that. 4840 */ 4841 error = zfs_suspend_fs(zfsvfs); 4842 if (error == 0) { 4843 dmu_objset_refresh_ownership(zfsvfs->z_os, 4844 zfsvfs); 4845 error = zfs_resume_fs(zfsvfs, zc->zc_name); 4846 } 4847 } 4848 if (error == 0) 4849 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 4850 VFS_RELE(zfsvfs->z_vfs); 4851 } else { 4852 /* XXX kind of reading contents without owning */ 4853 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4854 if (error != 0) 4855 return (error); 4856 4857 error = dmu_objset_userspace_upgrade(os); 4858 dmu_objset_rele(os, FTAG); 4859 } 4860 4861 return (error); 4862 } 4863 4864 /* 4865 * We don't want to have a hard dependency 4866 * against some special symbols in sharefs 4867 * nfs, and smbsrv. Determine them if needed when 4868 * the first file system is shared. 4869 * Neither sharefs, nfs or smbsrv are unloadable modules. 4870 */ 4871 int (*znfsexport_fs)(void *arg); 4872 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 4873 int (*zsmbexport_fs)(void *arg, boolean_t add_share); 4874 4875 int zfs_nfsshare_inited; 4876 int zfs_smbshare_inited; 4877 4878 ddi_modhandle_t nfs_mod; 4879 ddi_modhandle_t sharefs_mod; 4880 ddi_modhandle_t smbsrv_mod; 4881 kmutex_t zfs_share_lock; 4882 4883 static int 4884 zfs_init_sharefs() 4885 { 4886 int error; 4887 4888 ASSERT(MUTEX_HELD(&zfs_share_lock)); 4889 /* Both NFS and SMB shares also require sharetab support. */ 4890 if (sharefs_mod == NULL && ((sharefs_mod = 4891 ddi_modopen("fs/sharefs", 4892 KRTLD_MODE_FIRST, &error)) == NULL)) { 4893 return (SET_ERROR(ENOSYS)); 4894 } 4895 if (zshare_fs == NULL && ((zshare_fs = 4896 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 4897 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 4898 return (SET_ERROR(ENOSYS)); 4899 } 4900 return (0); 4901 } 4902 4903 static int 4904 zfs_ioc_share(zfs_cmd_t *zc) 4905 { 4906 int error; 4907 int opcode; 4908 4909 switch (zc->zc_share.z_sharetype) { 4910 case ZFS_SHARE_NFS: 4911 case ZFS_UNSHARE_NFS: 4912 if (zfs_nfsshare_inited == 0) { 4913 mutex_enter(&zfs_share_lock); 4914 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 4915 KRTLD_MODE_FIRST, &error)) == NULL)) { 4916 mutex_exit(&zfs_share_lock); 4917 return (SET_ERROR(ENOSYS)); 4918 } 4919 if (znfsexport_fs == NULL && 4920 ((znfsexport_fs = (int (*)(void *)) 4921 ddi_modsym(nfs_mod, 4922 "nfs_export", &error)) == NULL)) { 4923 mutex_exit(&zfs_share_lock); 4924 return (SET_ERROR(ENOSYS)); 4925 } 4926 error = zfs_init_sharefs(); 4927 if (error != 0) { 4928 mutex_exit(&zfs_share_lock); 4929 return (SET_ERROR(ENOSYS)); 4930 } 4931 zfs_nfsshare_inited = 1; 4932 mutex_exit(&zfs_share_lock); 4933 } 4934 break; 4935 case ZFS_SHARE_SMB: 4936 case ZFS_UNSHARE_SMB: 4937 if (zfs_smbshare_inited == 0) { 4938 mutex_enter(&zfs_share_lock); 4939 if (smbsrv_mod == NULL && ((smbsrv_mod = 4940 ddi_modopen("drv/smbsrv", 4941 KRTLD_MODE_FIRST, &error)) == NULL)) { 4942 mutex_exit(&zfs_share_lock); 4943 return (SET_ERROR(ENOSYS)); 4944 } 4945 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 4946 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 4947 "smb_server_share", &error)) == NULL)) { 4948 mutex_exit(&zfs_share_lock); 4949 return (SET_ERROR(ENOSYS)); 4950 } 4951 error = zfs_init_sharefs(); 4952 if (error != 0) { 4953 mutex_exit(&zfs_share_lock); 4954 return (SET_ERROR(ENOSYS)); 4955 } 4956 zfs_smbshare_inited = 1; 4957 mutex_exit(&zfs_share_lock); 4958 } 4959 break; 4960 default: 4961 return (SET_ERROR(EINVAL)); 4962 } 4963 4964 switch (zc->zc_share.z_sharetype) { 4965 case ZFS_SHARE_NFS: 4966 case ZFS_UNSHARE_NFS: 4967 if (error = 4968 znfsexport_fs((void *) 4969 (uintptr_t)zc->zc_share.z_exportdata)) 4970 return (error); 4971 break; 4972 case ZFS_SHARE_SMB: 4973 case ZFS_UNSHARE_SMB: 4974 if (error = zsmbexport_fs((void *) 4975 (uintptr_t)zc->zc_share.z_exportdata, 4976 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 4977 B_TRUE: B_FALSE)) { 4978 return (error); 4979 } 4980 break; 4981 } 4982 4983 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 4984 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 4985 SHAREFS_ADD : SHAREFS_REMOVE; 4986 4987 /* 4988 * Add or remove share from sharetab 4989 */ 4990 error = zshare_fs(opcode, 4991 (void *)(uintptr_t)zc->zc_share.z_sharedata, 4992 zc->zc_share.z_sharemax); 4993 4994 return (error); 4995 4996 } 4997 4998 ace_t full_access[] = { 4999 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 5000 }; 5001 5002 /* 5003 * inputs: 5004 * zc_name name of containing filesystem 5005 * zc_obj object # beyond which we want next in-use object # 5006 * 5007 * outputs: 5008 * zc_obj next in-use object # 5009 */ 5010 static int 5011 zfs_ioc_next_obj(zfs_cmd_t *zc) 5012 { 5013 objset_t *os = NULL; 5014 int error; 5015 5016 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 5017 if (error != 0) 5018 return (error); 5019 5020 error = dmu_object_next(os, &zc->zc_obj, B_FALSE, 5021 dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg); 5022 5023 dmu_objset_rele(os, FTAG); 5024 return (error); 5025 } 5026 5027 /* 5028 * inputs: 5029 * zc_name name of filesystem 5030 * zc_value prefix name for snapshot 5031 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 5032 * 5033 * outputs: 5034 * zc_value short name of new snapshot 5035 */ 5036 static int 5037 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc) 5038 { 5039 char *snap_name; 5040 char *hold_name; 5041 int error; 5042 minor_t minor; 5043 5044 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor); 5045 if (error != 0) 5046 return (error); 5047 5048 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value, 5049 (u_longlong_t)ddi_get_lbolt64()); 5050 hold_name = kmem_asprintf("%%%s", zc->zc_value); 5051 5052 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor, 5053 hold_name); 5054 if (error == 0) 5055 (void) strcpy(zc->zc_value, snap_name); 5056 strfree(snap_name); 5057 strfree(hold_name); 5058 zfs_onexit_fd_rele(zc->zc_cleanup_fd); 5059 return (error); 5060 } 5061 5062 /* 5063 * inputs: 5064 * zc_name name of "to" snapshot 5065 * zc_value name of "from" snapshot 5066 * zc_cookie file descriptor to write diff data on 5067 * 5068 * outputs: 5069 * dmu_diff_record_t's to the file descriptor 5070 */ 5071 static int 5072 zfs_ioc_diff(zfs_cmd_t *zc) 5073 { 5074 file_t *fp; 5075 offset_t off; 5076 int error; 5077 5078 fp = getf(zc->zc_cookie); 5079 if (fp == NULL) 5080 return (SET_ERROR(EBADF)); 5081 5082 off = fp->f_offset; 5083 5084 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off); 5085 5086 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5087 fp->f_offset = off; 5088 releasef(zc->zc_cookie); 5089 5090 return (error); 5091 } 5092 5093 /* 5094 * Remove all ACL files in shares dir 5095 */ 5096 static int 5097 zfs_smb_acl_purge(znode_t *dzp) 5098 { 5099 zap_cursor_t zc; 5100 zap_attribute_t zap; 5101 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 5102 int error; 5103 5104 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 5105 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 5106 zap_cursor_advance(&zc)) { 5107 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 5108 NULL, 0)) != 0) 5109 break; 5110 } 5111 zap_cursor_fini(&zc); 5112 return (error); 5113 } 5114 5115 static int 5116 zfs_ioc_smb_acl(zfs_cmd_t *zc) 5117 { 5118 vnode_t *vp; 5119 znode_t *dzp; 5120 vnode_t *resourcevp = NULL; 5121 znode_t *sharedir; 5122 zfsvfs_t *zfsvfs; 5123 nvlist_t *nvlist; 5124 char *src, *target; 5125 vattr_t vattr; 5126 vsecattr_t vsec; 5127 int error = 0; 5128 5129 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 5130 NO_FOLLOW, NULL, &vp)) != 0) 5131 return (error); 5132 5133 /* Now make sure mntpnt and dataset are ZFS */ 5134 5135 if (vp->v_vfsp->vfs_fstype != zfsfstype || 5136 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 5137 zc->zc_name) != 0)) { 5138 VN_RELE(vp); 5139 return (SET_ERROR(EINVAL)); 5140 } 5141 5142 dzp = VTOZ(vp); 5143 zfsvfs = dzp->z_zfsvfs; 5144 ZFS_ENTER(zfsvfs); 5145 5146 /* 5147 * Create share dir if its missing. 5148 */ 5149 mutex_enter(&zfsvfs->z_lock); 5150 if (zfsvfs->z_shares_dir == 0) { 5151 dmu_tx_t *tx; 5152 5153 tx = dmu_tx_create(zfsvfs->z_os); 5154 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 5155 ZFS_SHARES_DIR); 5156 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 5157 error = dmu_tx_assign(tx, TXG_WAIT); 5158 if (error != 0) { 5159 dmu_tx_abort(tx); 5160 } else { 5161 error = zfs_create_share_dir(zfsvfs, tx); 5162 dmu_tx_commit(tx); 5163 } 5164 if (error != 0) { 5165 mutex_exit(&zfsvfs->z_lock); 5166 VN_RELE(vp); 5167 ZFS_EXIT(zfsvfs); 5168 return (error); 5169 } 5170 } 5171 mutex_exit(&zfsvfs->z_lock); 5172 5173 ASSERT(zfsvfs->z_shares_dir); 5174 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 5175 VN_RELE(vp); 5176 ZFS_EXIT(zfsvfs); 5177 return (error); 5178 } 5179 5180 switch (zc->zc_cookie) { 5181 case ZFS_SMB_ACL_ADD: 5182 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 5183 vattr.va_type = VREG; 5184 vattr.va_mode = S_IFREG|0777; 5185 vattr.va_uid = 0; 5186 vattr.va_gid = 0; 5187 5188 vsec.vsa_mask = VSA_ACE; 5189 vsec.vsa_aclentp = &full_access; 5190 vsec.vsa_aclentsz = sizeof (full_access); 5191 vsec.vsa_aclcnt = 1; 5192 5193 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 5194 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 5195 if (resourcevp) 5196 VN_RELE(resourcevp); 5197 break; 5198 5199 case ZFS_SMB_ACL_REMOVE: 5200 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 5201 NULL, 0); 5202 break; 5203 5204 case ZFS_SMB_ACL_RENAME: 5205 if ((error = get_nvlist(zc->zc_nvlist_src, 5206 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 5207 VN_RELE(vp); 5208 VN_RELE(ZTOV(sharedir)); 5209 ZFS_EXIT(zfsvfs); 5210 return (error); 5211 } 5212 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 5213 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 5214 &target)) { 5215 VN_RELE(vp); 5216 VN_RELE(ZTOV(sharedir)); 5217 ZFS_EXIT(zfsvfs); 5218 nvlist_free(nvlist); 5219 return (error); 5220 } 5221 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 5222 kcred, NULL, 0); 5223 nvlist_free(nvlist); 5224 break; 5225 5226 case ZFS_SMB_ACL_PURGE: 5227 error = zfs_smb_acl_purge(sharedir); 5228 break; 5229 5230 default: 5231 error = SET_ERROR(EINVAL); 5232 break; 5233 } 5234 5235 VN_RELE(vp); 5236 VN_RELE(ZTOV(sharedir)); 5237 5238 ZFS_EXIT(zfsvfs); 5239 5240 return (error); 5241 } 5242 5243 /* 5244 * innvl: { 5245 * "holds" -> { snapname -> holdname (string), ... } 5246 * (optional) "cleanup_fd" -> fd (int32) 5247 * } 5248 * 5249 * outnvl: { 5250 * snapname -> error value (int32) 5251 * ... 5252 * } 5253 */ 5254 /* ARGSUSED */ 5255 static int 5256 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist) 5257 { 5258 nvpair_t *pair; 5259 nvlist_t *holds; 5260 int cleanup_fd = -1; 5261 int error; 5262 minor_t minor = 0; 5263 5264 error = nvlist_lookup_nvlist(args, "holds", &holds); 5265 if (error != 0) 5266 return (SET_ERROR(EINVAL)); 5267 5268 /* make sure the user didn't pass us any invalid (empty) tags */ 5269 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; 5270 pair = nvlist_next_nvpair(holds, pair)) { 5271 char *htag; 5272 5273 error = nvpair_value_string(pair, &htag); 5274 if (error != 0) 5275 return (SET_ERROR(error)); 5276 5277 if (strlen(htag) == 0) 5278 return (SET_ERROR(EINVAL)); 5279 } 5280 5281 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) { 5282 error = zfs_onexit_fd_hold(cleanup_fd, &minor); 5283 if (error != 0) 5284 return (error); 5285 } 5286 5287 error = dsl_dataset_user_hold(holds, minor, errlist); 5288 if (minor != 0) 5289 zfs_onexit_fd_rele(cleanup_fd); 5290 return (error); 5291 } 5292 5293 /* 5294 * innvl is not used. 5295 * 5296 * outnvl: { 5297 * holdname -> time added (uint64 seconds since epoch) 5298 * ... 5299 * } 5300 */ 5301 /* ARGSUSED */ 5302 static int 5303 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl) 5304 { 5305 return (dsl_dataset_get_holds(snapname, outnvl)); 5306 } 5307 5308 /* 5309 * innvl: { 5310 * snapname -> { holdname, ... } 5311 * ... 5312 * } 5313 * 5314 * outnvl: { 5315 * snapname -> error value (int32) 5316 * ... 5317 * } 5318 */ 5319 /* ARGSUSED */ 5320 static int 5321 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist) 5322 { 5323 return (dsl_dataset_user_release(holds, errlist)); 5324 } 5325 5326 /* 5327 * inputs: 5328 * zc_name name of new filesystem or snapshot 5329 * zc_value full name of old snapshot 5330 * 5331 * outputs: 5332 * zc_cookie space in bytes 5333 * zc_objset_type compressed space in bytes 5334 * zc_perm_action uncompressed space in bytes 5335 */ 5336 static int 5337 zfs_ioc_space_written(zfs_cmd_t *zc) 5338 { 5339 int error; 5340 dsl_pool_t *dp; 5341 dsl_dataset_t *new, *old; 5342 5343 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 5344 if (error != 0) 5345 return (error); 5346 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new); 5347 if (error != 0) { 5348 dsl_pool_rele(dp, FTAG); 5349 return (error); 5350 } 5351 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old); 5352 if (error != 0) { 5353 dsl_dataset_rele(new, FTAG); 5354 dsl_pool_rele(dp, FTAG); 5355 return (error); 5356 } 5357 5358 error = dsl_dataset_space_written(old, new, &zc->zc_cookie, 5359 &zc->zc_objset_type, &zc->zc_perm_action); 5360 dsl_dataset_rele(old, FTAG); 5361 dsl_dataset_rele(new, FTAG); 5362 dsl_pool_rele(dp, FTAG); 5363 return (error); 5364 } 5365 5366 /* 5367 * innvl: { 5368 * "firstsnap" -> snapshot name 5369 * } 5370 * 5371 * outnvl: { 5372 * "used" -> space in bytes 5373 * "compressed" -> compressed space in bytes 5374 * "uncompressed" -> uncompressed space in bytes 5375 * } 5376 */ 5377 static int 5378 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl) 5379 { 5380 int error; 5381 dsl_pool_t *dp; 5382 dsl_dataset_t *new, *old; 5383 char *firstsnap; 5384 uint64_t used, comp, uncomp; 5385 5386 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0) 5387 return (SET_ERROR(EINVAL)); 5388 5389 error = dsl_pool_hold(lastsnap, FTAG, &dp); 5390 if (error != 0) 5391 return (error); 5392 5393 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new); 5394 if (error == 0 && !new->ds_is_snapshot) { 5395 dsl_dataset_rele(new, FTAG); 5396 error = SET_ERROR(EINVAL); 5397 } 5398 if (error != 0) { 5399 dsl_pool_rele(dp, FTAG); 5400 return (error); 5401 } 5402 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old); 5403 if (error == 0 && !old->ds_is_snapshot) { 5404 dsl_dataset_rele(old, FTAG); 5405 error = SET_ERROR(EINVAL); 5406 } 5407 if (error != 0) { 5408 dsl_dataset_rele(new, FTAG); 5409 dsl_pool_rele(dp, FTAG); 5410 return (error); 5411 } 5412 5413 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp); 5414 dsl_dataset_rele(old, FTAG); 5415 dsl_dataset_rele(new, FTAG); 5416 dsl_pool_rele(dp, FTAG); 5417 fnvlist_add_uint64(outnvl, "used", used); 5418 fnvlist_add_uint64(outnvl, "compressed", comp); 5419 fnvlist_add_uint64(outnvl, "uncompressed", uncomp); 5420 return (error); 5421 } 5422 5423 /* 5424 * innvl: { 5425 * "fd" -> file descriptor to write stream to (int32) 5426 * (optional) "fromsnap" -> full snap name to send an incremental from 5427 * (optional) "largeblockok" -> (value ignored) 5428 * indicates that blocks > 128KB are permitted 5429 * (optional) "embedok" -> (value ignored) 5430 * presence indicates DRR_WRITE_EMBEDDED records are permitted 5431 * (optional) "resume_object" and "resume_offset" -> (uint64) 5432 * if present, resume send stream from specified object and offset. 5433 * } 5434 * 5435 * outnvl is unused 5436 */ 5437 /* ARGSUSED */ 5438 static int 5439 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5440 { 5441 int error; 5442 offset_t off; 5443 char *fromname = NULL; 5444 int fd; 5445 boolean_t largeblockok; 5446 boolean_t embedok; 5447 uint64_t resumeobj = 0; 5448 uint64_t resumeoff = 0; 5449 5450 error = nvlist_lookup_int32(innvl, "fd", &fd); 5451 if (error != 0) 5452 return (SET_ERROR(EINVAL)); 5453 5454 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname); 5455 5456 largeblockok = nvlist_exists(innvl, "largeblockok"); 5457 embedok = nvlist_exists(innvl, "embedok"); 5458 5459 (void) nvlist_lookup_uint64(innvl, "resume_object", &resumeobj); 5460 (void) nvlist_lookup_uint64(innvl, "resume_offset", &resumeoff); 5461 5462 file_t *fp = getf(fd); 5463 if (fp == NULL) 5464 return (SET_ERROR(EBADF)); 5465 5466 off = fp->f_offset; 5467 error = dmu_send(snapname, fromname, embedok, largeblockok, fd, 5468 resumeobj, resumeoff, fp->f_vnode, &off); 5469 5470 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5471 fp->f_offset = off; 5472 releasef(fd); 5473 return (error); 5474 } 5475 5476 /* 5477 * Determine approximately how large a zfs send stream will be -- the number 5478 * of bytes that will be written to the fd supplied to zfs_ioc_send_new(). 5479 * 5480 * innvl: { 5481 * (optional) "from" -> full snap or bookmark name to send an incremental 5482 * from 5483 * } 5484 * 5485 * outnvl: { 5486 * "space" -> bytes of space (uint64) 5487 * } 5488 */ 5489 static int 5490 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5491 { 5492 dsl_pool_t *dp; 5493 dsl_dataset_t *tosnap; 5494 int error; 5495 char *fromname; 5496 uint64_t space; 5497 5498 error = dsl_pool_hold(snapname, FTAG, &dp); 5499 if (error != 0) 5500 return (error); 5501 5502 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap); 5503 if (error != 0) { 5504 dsl_pool_rele(dp, FTAG); 5505 return (error); 5506 } 5507 5508 error = nvlist_lookup_string(innvl, "from", &fromname); 5509 if (error == 0) { 5510 if (strchr(fromname, '@') != NULL) { 5511 /* 5512 * If from is a snapshot, hold it and use the more 5513 * efficient dmu_send_estimate to estimate send space 5514 * size using deadlists. 5515 */ 5516 dsl_dataset_t *fromsnap; 5517 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap); 5518 if (error != 0) 5519 goto out; 5520 error = dmu_send_estimate(tosnap, fromsnap, &space); 5521 dsl_dataset_rele(fromsnap, FTAG); 5522 } else if (strchr(fromname, '#') != NULL) { 5523 /* 5524 * If from is a bookmark, fetch the creation TXG of the 5525 * snapshot it was created from and use that to find 5526 * blocks that were born after it. 5527 */ 5528 zfs_bookmark_phys_t frombm; 5529 5530 error = dsl_bookmark_lookup(dp, fromname, tosnap, 5531 &frombm); 5532 if (error != 0) 5533 goto out; 5534 error = dmu_send_estimate_from_txg(tosnap, 5535 frombm.zbm_creation_txg, &space); 5536 } else { 5537 /* 5538 * from is not properly formatted as a snapshot or 5539 * bookmark 5540 */ 5541 error = SET_ERROR(EINVAL); 5542 goto out; 5543 } 5544 } else { 5545 // If estimating the size of a full send, use dmu_send_estimate 5546 error = dmu_send_estimate(tosnap, NULL, &space); 5547 } 5548 5549 fnvlist_add_uint64(outnvl, "space", space); 5550 5551 out: 5552 dsl_dataset_rele(tosnap, FTAG); 5553 dsl_pool_rele(dp, FTAG); 5554 return (error); 5555 } 5556 5557 static int 5558 zfs_ioc_set_zev_callbacks(const char *unused, nvlist_t *innvl, 5559 nvlist_t *outnvl) 5560 { 5561 int error; 5562 uint64_t cb_addr; 5563 /* 5564 * Our secpolicy for this op makes sure it's called in 5565 * kernel context, and that no other callbacks have 5566 * been registered, yet. 5567 */ 5568 error = nvlist_lookup_uint64(innvl, "callbacks", &cb_addr); 5569 if (error != 0) { 5570 cmn_err(CE_WARN, "set_zev_callbacks nvlist lookup failed (%d)", 5571 error); 5572 return (error); 5573 } 5574 /* cb_addr is always a kernel memory address */ 5575 rw_enter(&rz_zev_rwlock, RW_WRITER); 5576 if (rz_zev_callbacks != rz_zev_default_callbacks) { 5577 rw_exit(&rz_zev_rwlock); 5578 return (EBUSY); 5579 } 5580 rz_zev_callbacks = (void *)(uintptr_t)cb_addr; 5581 rw_exit(&rz_zev_rwlock); 5582 return (0); 5583 } 5584 5585 static int 5586 zfs_ioc_unset_zev_callbacks(const char *unused, nvlist_t *innvl, 5587 nvlist_t *outnvl) 5588 { 5589 /* 5590 * Our secpolicy for this op makes sure it's called in 5591 * kernel context. 5592 */ 5593 rw_enter(&rz_zev_rwlock, RW_WRITER); 5594 rz_zev_callbacks = rz_zev_default_callbacks; 5595 rw_exit(&rz_zev_rwlock); 5596 /* after mutex release, no thread is using the old table anymore. */ 5597 return (0); 5598 } 5599 5600 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST]; 5601 5602 static void 5603 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5604 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5605 boolean_t log_history, zfs_ioc_poolcheck_t pool_check) 5606 { 5607 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5608 5609 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5610 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5611 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5612 ASSERT3P(vec->zvec_func, ==, NULL); 5613 5614 vec->zvec_legacy_func = func; 5615 vec->zvec_secpolicy = secpolicy; 5616 vec->zvec_namecheck = namecheck; 5617 vec->zvec_allow_log = log_history; 5618 vec->zvec_pool_check = pool_check; 5619 } 5620 5621 /* 5622 * See the block comment at the beginning of this file for details on 5623 * each argument to this function. 5624 */ 5625 static void 5626 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func, 5627 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5628 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist, 5629 boolean_t allow_log) 5630 { 5631 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5632 5633 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5634 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5635 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5636 ASSERT3P(vec->zvec_func, ==, NULL); 5637 5638 /* if we are logging, the name must be valid */ 5639 ASSERT(!allow_log || namecheck != NO_NAME); 5640 5641 vec->zvec_name = name; 5642 vec->zvec_func = func; 5643 vec->zvec_secpolicy = secpolicy; 5644 vec->zvec_namecheck = namecheck; 5645 vec->zvec_pool_check = pool_check; 5646 vec->zvec_smush_outnvlist = smush_outnvlist; 5647 vec->zvec_allow_log = allow_log; 5648 } 5649 5650 static void 5651 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5652 zfs_secpolicy_func_t *secpolicy, boolean_t log_history, 5653 zfs_ioc_poolcheck_t pool_check) 5654 { 5655 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5656 POOL_NAME, log_history, pool_check); 5657 } 5658 5659 static void 5660 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5661 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check) 5662 { 5663 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5664 DATASET_NAME, B_FALSE, pool_check); 5665 } 5666 5667 static void 5668 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5669 { 5670 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config, 5671 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5672 } 5673 5674 static void 5675 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5676 zfs_secpolicy_func_t *secpolicy) 5677 { 5678 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5679 NO_NAME, B_FALSE, POOL_CHECK_NONE); 5680 } 5681 5682 static void 5683 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc, 5684 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy) 5685 { 5686 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5687 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED); 5688 } 5689 5690 static void 5691 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5692 { 5693 zfs_ioctl_register_dataset_read_secpolicy(ioc, func, 5694 zfs_secpolicy_read); 5695 } 5696 5697 static void 5698 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5699 zfs_secpolicy_func_t *secpolicy) 5700 { 5701 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5702 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5703 } 5704 5705 static void 5706 zfs_ioctl_init(void) 5707 { 5708 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT, 5709 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME, 5710 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5711 5712 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY, 5713 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME, 5714 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE); 5715 5716 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS, 5717 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME, 5718 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5719 5720 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW, 5721 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME, 5722 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5723 5724 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE, 5725 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME, 5726 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5727 5728 zfs_ioctl_register("create", ZFS_IOC_CREATE, 5729 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME, 5730 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5731 5732 zfs_ioctl_register("clone", ZFS_IOC_CLONE, 5733 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME, 5734 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5735 5736 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS, 5737 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME, 5738 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5739 5740 zfs_ioctl_register("hold", ZFS_IOC_HOLD, 5741 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME, 5742 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5743 zfs_ioctl_register("release", ZFS_IOC_RELEASE, 5744 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME, 5745 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5746 5747 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS, 5748 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, 5749 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5750 5751 zfs_ioctl_register("set_zev_callbacks", ZFS_IOC_SET_ZEV_CALLBACKS, 5752 zfs_ioc_set_zev_callbacks, zfs_secpolicy_set_zev_callbacks, NO_NAME, 5753 POOL_CHECK_NONE, B_TRUE, B_FALSE); 5754 5755 zfs_ioctl_register("unset_zev_callbacks", ZFS_IOC_UNSET_ZEV_CALLBACKS, 5756 zfs_ioc_unset_zev_callbacks, zfs_secpolicy_unset_zev_callbacks, 5757 NO_NAME, POOL_CHECK_NONE, B_TRUE, B_FALSE); 5758 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK, 5759 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, 5760 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE); 5761 5762 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK, 5763 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME, 5764 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5765 5766 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS, 5767 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME, 5768 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5769 5770 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS, 5771 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks, 5772 POOL_NAME, 5773 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5774 5775 /* IOCTLS that use the legacy function signature */ 5776 5777 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze, 5778 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY); 5779 5780 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create, 5781 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5782 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN, 5783 zfs_ioc_pool_scan); 5784 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE, 5785 zfs_ioc_pool_upgrade); 5786 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD, 5787 zfs_ioc_vdev_add); 5788 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE, 5789 zfs_ioc_vdev_remove); 5790 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE, 5791 zfs_ioc_vdev_set_state); 5792 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH, 5793 zfs_ioc_vdev_attach); 5794 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH, 5795 zfs_ioc_vdev_detach); 5796 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH, 5797 zfs_ioc_vdev_setpath); 5798 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU, 5799 zfs_ioc_vdev_setfru); 5800 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS, 5801 zfs_ioc_pool_set_props); 5802 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT, 5803 zfs_ioc_vdev_split); 5804 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID, 5805 zfs_ioc_pool_reguid); 5806 5807 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS, 5808 zfs_ioc_pool_configs, zfs_secpolicy_none); 5809 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT, 5810 zfs_ioc_pool_tryimport, zfs_secpolicy_config); 5811 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT, 5812 zfs_ioc_inject_fault, zfs_secpolicy_inject); 5813 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT, 5814 zfs_ioc_clear_fault, zfs_secpolicy_inject); 5815 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT, 5816 zfs_ioc_inject_list_next, zfs_secpolicy_inject); 5817 5818 /* 5819 * pool destroy, and export don't log the history as part of 5820 * zfsdev_ioctl, but rather zfs_ioc_pool_export 5821 * does the logging of those commands. 5822 */ 5823 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy, 5824 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5825 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export, 5826 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5827 5828 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats, 5829 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5830 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props, 5831 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5832 5833 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log, 5834 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED); 5835 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME, 5836 zfs_ioc_dsobj_to_dsname, 5837 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED); 5838 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY, 5839 zfs_ioc_pool_get_history, 5840 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED); 5841 5842 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import, 5843 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5844 5845 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear, 5846 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5847 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen, 5848 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED); 5849 5850 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN, 5851 zfs_ioc_space_written); 5852 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS, 5853 zfs_ioc_objset_recvd_props); 5854 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ, 5855 zfs_ioc_next_obj); 5856 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL, 5857 zfs_ioc_get_fsacl); 5858 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS, 5859 zfs_ioc_objset_stats); 5860 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS, 5861 zfs_ioc_objset_zplprops); 5862 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT, 5863 zfs_ioc_dataset_list_next); 5864 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT, 5865 zfs_ioc_snapshot_list_next); 5866 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS, 5867 zfs_ioc_send_progress); 5868 5869 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF, 5870 zfs_ioc_diff, zfs_secpolicy_diff); 5871 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS, 5872 zfs_ioc_obj_to_stats, zfs_secpolicy_diff); 5873 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH, 5874 zfs_ioc_obj_to_path, zfs_secpolicy_diff); 5875 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE, 5876 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one); 5877 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY, 5878 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many); 5879 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND, 5880 zfs_ioc_send, zfs_secpolicy_send); 5881 5882 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop, 5883 zfs_secpolicy_none); 5884 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy, 5885 zfs_secpolicy_destroy); 5886 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename, 5887 zfs_secpolicy_rename); 5888 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv, 5889 zfs_secpolicy_recv); 5890 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote, 5891 zfs_secpolicy_promote); 5892 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP, 5893 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop); 5894 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl, 5895 zfs_secpolicy_set_fsacl); 5896 5897 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share, 5898 zfs_secpolicy_share, POOL_CHECK_NONE); 5899 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl, 5900 zfs_secpolicy_smb_acl, POOL_CHECK_NONE); 5901 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE, 5902 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 5903 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5904 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT, 5905 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, 5906 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5907 } 5908 5909 int 5910 pool_status_check(const char *name, zfs_ioc_namecheck_t type, 5911 zfs_ioc_poolcheck_t check) 5912 { 5913 spa_t *spa; 5914 int error; 5915 5916 ASSERT(type == POOL_NAME || type == DATASET_NAME); 5917 5918 if (check & POOL_CHECK_NONE) 5919 return (0); 5920 5921 error = spa_open(name, &spa, FTAG); 5922 if (error == 0) { 5923 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa)) 5924 error = SET_ERROR(EAGAIN); 5925 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa)) 5926 error = SET_ERROR(EROFS); 5927 spa_close(spa, FTAG); 5928 } 5929 return (error); 5930 } 5931 5932 /* 5933 * Find a free minor number. 5934 */ 5935 minor_t 5936 zfsdev_minor_alloc(void) 5937 { 5938 static minor_t last_minor; 5939 minor_t m; 5940 5941 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5942 5943 for (m = last_minor + 1; m != last_minor; m++) { 5944 if (m > ZFSDEV_MAX_MINOR) 5945 m = 1; 5946 if (ddi_get_soft_state(zfsdev_state, m) == NULL) { 5947 last_minor = m; 5948 return (m); 5949 } 5950 } 5951 5952 return (0); 5953 } 5954 5955 static int 5956 zfs_ctldev_init(dev_t *devp) 5957 { 5958 minor_t minor; 5959 zfs_soft_state_t *zs; 5960 5961 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5962 ASSERT(getminor(*devp) == 0); 5963 5964 minor = zfsdev_minor_alloc(); 5965 if (minor == 0) 5966 return (SET_ERROR(ENXIO)); 5967 5968 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) 5969 return (SET_ERROR(EAGAIN)); 5970 5971 *devp = makedevice(getemajor(*devp), minor); 5972 5973 zs = ddi_get_soft_state(zfsdev_state, minor); 5974 zs->zss_type = ZSST_CTLDEV; 5975 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data); 5976 5977 return (0); 5978 } 5979 5980 static void 5981 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor) 5982 { 5983 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5984 5985 zfs_onexit_destroy(zo); 5986 ddi_soft_state_free(zfsdev_state, minor); 5987 } 5988 5989 void * 5990 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which) 5991 { 5992 zfs_soft_state_t *zp; 5993 5994 zp = ddi_get_soft_state(zfsdev_state, minor); 5995 if (zp == NULL || zp->zss_type != which) 5996 return (NULL); 5997 5998 return (zp->zss_data); 5999 } 6000 6001 static int 6002 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr) 6003 { 6004 int error = 0; 6005 6006 if (getminor(*devp) != 0) 6007 return (zvol_open(devp, flag, otyp, cr)); 6008 6009 /* This is the control device. Allocate a new minor if requested. */ 6010 if (flag & FEXCL) { 6011 mutex_enter(&zfsdev_state_lock); 6012 error = zfs_ctldev_init(devp); 6013 mutex_exit(&zfsdev_state_lock); 6014 } 6015 6016 return (error); 6017 } 6018 6019 static int 6020 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr) 6021 { 6022 zfs_onexit_t *zo; 6023 minor_t minor = getminor(dev); 6024 6025 if (minor == 0) 6026 return (0); 6027 6028 mutex_enter(&zfsdev_state_lock); 6029 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV); 6030 if (zo == NULL) { 6031 mutex_exit(&zfsdev_state_lock); 6032 return (zvol_close(dev, flag, otyp, cr)); 6033 } 6034 zfs_ctldev_destroy(zo, minor); 6035 mutex_exit(&zfsdev_state_lock); 6036 6037 return (0); 6038 } 6039 6040 static int 6041 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 6042 { 6043 zfs_cmd_t *zc; 6044 uint_t vecnum; 6045 int error, rc, len; 6046 minor_t minor = getminor(dev); 6047 const zfs_ioc_vec_t *vec; 6048 char *saved_poolname = NULL; 6049 nvlist_t *innvl = NULL; 6050 6051 if (minor != 0 && 6052 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL) 6053 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 6054 6055 vecnum = cmd - ZFS_IOC_FIRST; 6056 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 6057 6058 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 6059 return (SET_ERROR(EINVAL)); 6060 vec = &zfs_ioc_vec[vecnum]; 6061 6062 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 6063 6064 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 6065 if (error != 0) { 6066 error = SET_ERROR(EFAULT); 6067 goto out; 6068 } 6069 6070 zc->zc_iflags = flag & FKIOCTL; 6071 if (zc->zc_nvlist_src_size != 0) { 6072 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 6073 zc->zc_iflags, &innvl); 6074 if (error != 0) 6075 goto out; 6076 } 6077 6078 /* 6079 * Ensure that all pool/dataset names are valid before we pass down to 6080 * the lower layers. 6081 */ 6082 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 6083 switch (vec->zvec_namecheck) { 6084 case POOL_NAME: 6085 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 6086 error = SET_ERROR(EINVAL); 6087 else 6088 error = pool_status_check(zc->zc_name, 6089 vec->zvec_namecheck, vec->zvec_pool_check); 6090 break; 6091 6092 case DATASET_NAME: 6093 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 6094 error = SET_ERROR(EINVAL); 6095 else 6096 error = pool_status_check(zc->zc_name, 6097 vec->zvec_namecheck, vec->zvec_pool_check); 6098 break; 6099 6100 case NO_NAME: 6101 break; 6102 } 6103 6104 6105 if (error == 0 && !(flag & FKIOCTL)) 6106 error = vec->zvec_secpolicy(zc, innvl, cr); 6107 6108 if (error != 0) 6109 goto out; 6110 6111 /* legacy ioctls can modify zc_name */ 6112 len = strcspn(zc->zc_name, "/@#") + 1; 6113 saved_poolname = kmem_alloc(len, KM_SLEEP); 6114 (void) strlcpy(saved_poolname, zc->zc_name, len); 6115 6116 if (vec->zvec_func != NULL) { 6117 nvlist_t *outnvl; 6118 int puterror = 0; 6119 spa_t *spa; 6120 nvlist_t *lognv = NULL; 6121 6122 ASSERT(vec->zvec_legacy_func == NULL); 6123 6124 /* 6125 * Add the innvl to the lognv before calling the func, 6126 * in case the func changes the innvl. 6127 */ 6128 if (vec->zvec_allow_log) { 6129 lognv = fnvlist_alloc(); 6130 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL, 6131 vec->zvec_name); 6132 if (!nvlist_empty(innvl)) { 6133 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL, 6134 innvl); 6135 } 6136 } 6137 6138 outnvl = fnvlist_alloc(); 6139 error = vec->zvec_func(zc->zc_name, innvl, outnvl); 6140 6141 if (error == 0 && vec->zvec_allow_log && 6142 spa_open(zc->zc_name, &spa, FTAG) == 0) { 6143 if (!nvlist_empty(outnvl)) { 6144 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL, 6145 outnvl); 6146 } 6147 (void) spa_history_log_nvl(spa, lognv); 6148 spa_close(spa, FTAG); 6149 } 6150 fnvlist_free(lognv); 6151 6152 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) { 6153 int smusherror = 0; 6154 if (vec->zvec_smush_outnvlist) { 6155 smusherror = nvlist_smush(outnvl, 6156 zc->zc_nvlist_dst_size); 6157 } 6158 if (smusherror == 0) 6159 puterror = put_nvlist(zc, outnvl); 6160 } 6161 6162 if (puterror != 0) 6163 error = puterror; 6164 6165 nvlist_free(outnvl); 6166 } else { 6167 error = vec->zvec_legacy_func(zc); 6168 } 6169 6170 out: 6171 nvlist_free(innvl); 6172 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 6173 if (error == 0 && rc != 0) 6174 error = SET_ERROR(EFAULT); 6175 if (error == 0 && vec->zvec_allow_log) { 6176 char *s = tsd_get(zfs_allow_log_key); 6177 if (s != NULL) 6178 strfree(s); 6179 (void) tsd_set(zfs_allow_log_key, saved_poolname); 6180 } else { 6181 if (saved_poolname != NULL) 6182 strfree(saved_poolname); 6183 } 6184 6185 kmem_free(zc, sizeof (zfs_cmd_t)); 6186 return (error); 6187 } 6188 6189 static int 6190 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 6191 { 6192 if (cmd != DDI_ATTACH) 6193 return (DDI_FAILURE); 6194 6195 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 6196 DDI_PSEUDO, 0) == DDI_FAILURE) 6197 return (DDI_FAILURE); 6198 6199 zfs_dip = dip; 6200 6201 ddi_report_dev(dip); 6202 6203 return (DDI_SUCCESS); 6204 } 6205 6206 static int 6207 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 6208 { 6209 if (spa_busy() || zfs_busy() || zvol_busy()) 6210 return (DDI_FAILURE); 6211 6212 if (cmd != DDI_DETACH) 6213 return (DDI_FAILURE); 6214 6215 zfs_dip = NULL; 6216 6217 ddi_prop_remove_all(dip); 6218 ddi_remove_minor_node(dip, NULL); 6219 6220 return (DDI_SUCCESS); 6221 } 6222 6223 /*ARGSUSED*/ 6224 static int 6225 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 6226 { 6227 switch (infocmd) { 6228 case DDI_INFO_DEVT2DEVINFO: 6229 *result = zfs_dip; 6230 return (DDI_SUCCESS); 6231 6232 case DDI_INFO_DEVT2INSTANCE: 6233 *result = (void *)0; 6234 return (DDI_SUCCESS); 6235 } 6236 6237 return (DDI_FAILURE); 6238 } 6239 6240 /* 6241 * OK, so this is a little weird. 6242 * 6243 * /dev/zfs is the control node, i.e. minor 0. 6244 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 6245 * 6246 * /dev/zfs has basically nothing to do except serve up ioctls, 6247 * so most of the standard driver entry points are in zvol.c. 6248 */ 6249 static struct cb_ops zfs_cb_ops = { 6250 zfsdev_open, /* open */ 6251 zfsdev_close, /* close */ 6252 zvol_strategy, /* strategy */ 6253 nodev, /* print */ 6254 zvol_dump, /* dump */ 6255 zvol_read, /* read */ 6256 zvol_write, /* write */ 6257 zfsdev_ioctl, /* ioctl */ 6258 nodev, /* devmap */ 6259 nodev, /* mmap */ 6260 nodev, /* segmap */ 6261 nochpoll, /* poll */ 6262 ddi_prop_op, /* prop_op */ 6263 NULL, /* streamtab */ 6264 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 6265 CB_REV, /* version */ 6266 nodev, /* async read */ 6267 nodev, /* async write */ 6268 }; 6269 6270 static struct dev_ops zfs_dev_ops = { 6271 DEVO_REV, /* version */ 6272 0, /* refcnt */ 6273 zfs_info, /* info */ 6274 nulldev, /* identify */ 6275 nulldev, /* probe */ 6276 zfs_attach, /* attach */ 6277 zfs_detach, /* detach */ 6278 nodev, /* reset */ 6279 &zfs_cb_ops, /* driver operations */ 6280 NULL, /* no bus operations */ 6281 NULL, /* power */ 6282 ddi_quiesce_not_needed, /* quiesce */ 6283 }; 6284 6285 static struct modldrv zfs_modldrv = { 6286 &mod_driverops, 6287 "ZFS storage pool", 6288 &zfs_dev_ops 6289 }; 6290 6291 static struct modlinkage modlinkage = { 6292 MODREV_1, 6293 (void *)&zfs_modlfs, 6294 (void *)&zfs_modldrv, 6295 NULL 6296 }; 6297 6298 static void 6299 zfs_allow_log_destroy(void *arg) 6300 { 6301 char *poolname = arg; 6302 strfree(poolname); 6303 } 6304 6305 int 6306 _init(void) 6307 { 6308 int error; 6309 6310 spa_init(FREAD | FWRITE); 6311 zfs_init(); 6312 zvol_init(); 6313 zfs_ioctl_init(); 6314 rz_zev_init(); 6315 6316 if ((error = mod_install(&modlinkage)) != 0) { 6317 zvol_fini(); 6318 zfs_fini(); 6319 spa_fini(); 6320 return (error); 6321 } 6322 6323 tsd_create(&zfs_fsyncer_key, NULL); 6324 tsd_create(&rrw_tsd_key, rrw_tsd_destroy); 6325 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy); 6326 6327 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 6328 ASSERT(error == 0); 6329 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 6330 6331 return (0); 6332 } 6333 6334 int 6335 _fini(void) 6336 { 6337 int error; 6338 6339 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 6340 return (SET_ERROR(EBUSY)); 6341 6342 if ((error = mod_remove(&modlinkage)) != 0) 6343 return (error); 6344 6345 rz_zev_fini(); 6346 zvol_fini(); 6347 zfs_fini(); 6348 spa_fini(); 6349 if (zfs_nfsshare_inited) 6350 (void) ddi_modclose(nfs_mod); 6351 if (zfs_smbshare_inited) 6352 (void) ddi_modclose(smbsrv_mod); 6353 if (zfs_nfsshare_inited || zfs_smbshare_inited) 6354 (void) ddi_modclose(sharefs_mod); 6355 6356 tsd_destroy(&zfs_fsyncer_key); 6357 ldi_ident_release(zfs_li); 6358 zfs_li = NULL; 6359 mutex_destroy(&zfs_share_lock); 6360 6361 return (error); 6362 } 6363 6364 int 6365 _info(struct modinfo *modinfop) 6366 { 6367 return (mod_info(&modlinkage, modinfop)); 6368 } 6369