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 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved. 25 * Portions Copyright 2011 Martin Matuska 26 * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved. 27 * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 28 * Copyright (c) 2014, 2016 Joyent, Inc. All rights reserved. 29 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 30 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 31 * Copyright (c) 2013 Steven Hartland. All rights reserved. 32 * Copyright (c) 2014 Integros [integros.com] 33 * Copyright 2016 Toomas Soome <tsoome@me.com> 34 * Copyright 2017 RackTop Systems. 35 */ 36 37 /* 38 * ZFS ioctls. 39 * 40 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage 41 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool. 42 * 43 * There are two ways that we handle ioctls: the legacy way where almost 44 * all of the logic is in the ioctl callback, and the new way where most 45 * of the marshalling is handled in the common entry point, zfsdev_ioctl(). 46 * 47 * Non-legacy ioctls should be registered by calling 48 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked 49 * from userland by lzc_ioctl(). 50 * 51 * The registration arguments are as follows: 52 * 53 * const char *name 54 * The name of the ioctl. This is used for history logging. If the 55 * ioctl returns successfully (the callback returns 0), and allow_log 56 * is true, then a history log entry will be recorded with the input & 57 * output nvlists. The log entry can be printed with "zpool history -i". 58 * 59 * zfs_ioc_t ioc 60 * The ioctl request number, which userland will pass to ioctl(2). 61 * The ioctl numbers can change from release to release, because 62 * the caller (libzfs) must be matched to the kernel. 63 * 64 * zfs_secpolicy_func_t *secpolicy 65 * This function will be called before the zfs_ioc_func_t, to 66 * determine if this operation is permitted. It should return EPERM 67 * on failure, and 0 on success. Checks include determining if the 68 * dataset is visible in this zone, and if the user has either all 69 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission 70 * to do this operation on this dataset with "zfs allow". 71 * 72 * zfs_ioc_namecheck_t namecheck 73 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool 74 * name, a dataset name, or nothing. If the name is not well-formed, 75 * the ioctl will fail and the callback will not be called. 76 * Therefore, the callback can assume that the name is well-formed 77 * (e.g. is null-terminated, doesn't have more than one '@' character, 78 * doesn't have invalid characters). 79 * 80 * zfs_ioc_poolcheck_t pool_check 81 * This specifies requirements on the pool state. If the pool does 82 * not meet them (is suspended or is readonly), the ioctl will fail 83 * and the callback will not be called. If any checks are specified 84 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME. 85 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED | 86 * POOL_CHECK_READONLY). 87 * 88 * boolean_t smush_outnvlist 89 * If smush_outnvlist is true, then the output is presumed to be a 90 * list of errors, and it will be "smushed" down to fit into the 91 * caller's buffer, by removing some entries and replacing them with a 92 * single "N_MORE_ERRORS" entry indicating how many were removed. See 93 * nvlist_smush() for details. If smush_outnvlist is false, and the 94 * outnvlist does not fit into the userland-provided buffer, then the 95 * ioctl will fail with ENOMEM. 96 * 97 * zfs_ioc_func_t *func 98 * The callback function that will perform the operation. 99 * 100 * The callback should return 0 on success, or an error number on 101 * failure. If the function fails, the userland ioctl will return -1, 102 * and errno will be set to the callback's return value. The callback 103 * will be called with the following arguments: 104 * 105 * const char *name 106 * The name of the pool or dataset to operate on, from 107 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the 108 * expected type (pool, dataset, or none). 109 * 110 * nvlist_t *innvl 111 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or 112 * NULL if no input nvlist was provided. Changes to this nvlist are 113 * ignored. If the input nvlist could not be deserialized, the 114 * ioctl will fail and the callback will not be called. 115 * 116 * nvlist_t *outnvl 117 * The output nvlist, initially empty. The callback can fill it in, 118 * and it will be returned to userland by serializing it into 119 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization 120 * fails (e.g. because the caller didn't supply a large enough 121 * buffer), then the overall ioctl will fail. See the 122 * 'smush_nvlist' argument above for additional behaviors. 123 * 124 * There are two typical uses of the output nvlist: 125 * - To return state, e.g. property values. In this case, 126 * smush_outnvlist should be false. If the buffer was not large 127 * enough, the caller will reallocate a larger buffer and try 128 * the ioctl again. 129 * 130 * - To return multiple errors from an ioctl which makes on-disk 131 * changes. In this case, smush_outnvlist should be true. 132 * Ioctls which make on-disk modifications should generally not 133 * use the outnvl if they succeed, because the caller can not 134 * distinguish between the operation failing, and 135 * deserialization failing. 136 */ 137 138 #include <sys/types.h> 139 #include <sys/param.h> 140 #include <sys/errno.h> 141 #include <sys/uio.h> 142 #include <sys/buf.h> 143 #include <sys/modctl.h> 144 #include <sys/open.h> 145 #include <sys/file.h> 146 #include <sys/kmem.h> 147 #include <sys/conf.h> 148 #include <sys/cmn_err.h> 149 #include <sys/stat.h> 150 #include <sys/zfs_ioctl.h> 151 #include <sys/zfs_vfsops.h> 152 #include <sys/zfs_znode.h> 153 #include <sys/zap.h> 154 #include <sys/spa.h> 155 #include <sys/spa_impl.h> 156 #include <sys/vdev.h> 157 #include <sys/priv_impl.h> 158 #include <sys/dmu.h> 159 #include <sys/dsl_dir.h> 160 #include <sys/dsl_dataset.h> 161 #include <sys/dsl_prop.h> 162 #include <sys/dsl_deleg.h> 163 #include <sys/dmu_objset.h> 164 #include <sys/dmu_impl.h> 165 #include <sys/dmu_tx.h> 166 #include <sys/ddi.h> 167 #include <sys/sunddi.h> 168 #include <sys/sunldi.h> 169 #include <sys/policy.h> 170 #include <sys/zone.h> 171 #include <sys/nvpair.h> 172 #include <sys/pathname.h> 173 #include <sys/mount.h> 174 #include <sys/sdt.h> 175 #include <sys/fs/zfs.h> 176 #include <sys/zfs_ctldir.h> 177 #include <sys/zfs_dir.h> 178 #include <sys/zfs_onexit.h> 179 #include <sys/zvol.h> 180 #include <sys/dsl_scan.h> 181 #include <sharefs/share.h> 182 #include <sys/dmu_objset.h> 183 #include <sys/dmu_send.h> 184 #include <sys/dsl_destroy.h> 185 #include <sys/dsl_bookmark.h> 186 #include <sys/dsl_userhold.h> 187 #include <sys/zfeature.h> 188 #include <sys/zio_checksum.h> 189 190 #include "zfs_namecheck.h" 191 #include "zfs_prop.h" 192 #include "zfs_deleg.h" 193 #include "zfs_comutil.h" 194 195 extern struct modlfs zfs_modlfs; 196 197 extern void zfs_init(void); 198 extern void zfs_fini(void); 199 200 ldi_ident_t zfs_li = NULL; 201 dev_info_t *zfs_dip; 202 203 uint_t zfs_fsyncer_key; 204 extern uint_t rrw_tsd_key; 205 static uint_t zfs_allow_log_key; 206 207 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *); 208 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *); 209 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *); 210 211 typedef enum { 212 NO_NAME, 213 POOL_NAME, 214 DATASET_NAME 215 } zfs_ioc_namecheck_t; 216 217 typedef enum { 218 POOL_CHECK_NONE = 1 << 0, 219 POOL_CHECK_SUSPENDED = 1 << 1, 220 POOL_CHECK_READONLY = 1 << 2, 221 } zfs_ioc_poolcheck_t; 222 223 typedef struct zfs_ioc_vec { 224 zfs_ioc_legacy_func_t *zvec_legacy_func; 225 zfs_ioc_func_t *zvec_func; 226 zfs_secpolicy_func_t *zvec_secpolicy; 227 zfs_ioc_namecheck_t zvec_namecheck; 228 boolean_t zvec_allow_log; 229 zfs_ioc_poolcheck_t zvec_pool_check; 230 boolean_t zvec_smush_outnvlist; 231 const char *zvec_name; 232 } zfs_ioc_vec_t; 233 234 /* This array is indexed by zfs_userquota_prop_t */ 235 static const char *userquota_perms[] = { 236 ZFS_DELEG_PERM_USERUSED, 237 ZFS_DELEG_PERM_USERQUOTA, 238 ZFS_DELEG_PERM_GROUPUSED, 239 ZFS_DELEG_PERM_GROUPQUOTA, 240 }; 241 242 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc); 243 static int zfs_check_settable(const char *name, nvpair_t *property, 244 cred_t *cr); 245 static int zfs_check_clearable(char *dataset, nvlist_t *props, 246 nvlist_t **errors); 247 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *, 248 boolean_t *); 249 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *); 250 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp); 251 252 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature); 253 254 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ 255 void 256 __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 257 { 258 const char *newfile; 259 char buf[512]; 260 va_list adx; 261 262 /* 263 * Get rid of annoying "../common/" prefix to filename. 264 */ 265 newfile = strrchr(file, '/'); 266 if (newfile != NULL) { 267 newfile = newfile + 1; /* Get rid of leading / */ 268 } else { 269 newfile = file; 270 } 271 272 va_start(adx, fmt); 273 (void) vsnprintf(buf, sizeof (buf), fmt, adx); 274 va_end(adx); 275 276 /* 277 * To get this data, use the zfs-dprintf probe as so: 278 * dtrace -q -n 'zfs-dprintf \ 279 * /stringof(arg0) == "dbuf.c"/ \ 280 * {printf("%s: %s", stringof(arg1), stringof(arg3))}' 281 * arg0 = file name 282 * arg1 = function name 283 * arg2 = line number 284 * arg3 = message 285 */ 286 DTRACE_PROBE4(zfs__dprintf, 287 char *, newfile, char *, func, int, line, char *, buf); 288 } 289 290 static void 291 history_str_free(char *buf) 292 { 293 kmem_free(buf, HIS_MAX_RECORD_LEN); 294 } 295 296 static char * 297 history_str_get(zfs_cmd_t *zc) 298 { 299 char *buf; 300 301 if (zc->zc_history == NULL) 302 return (NULL); 303 304 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); 305 if (copyinstr((void *)(uintptr_t)zc->zc_history, 306 buf, HIS_MAX_RECORD_LEN, NULL) != 0) { 307 history_str_free(buf); 308 return (NULL); 309 } 310 311 buf[HIS_MAX_RECORD_LEN -1] = '\0'; 312 313 return (buf); 314 } 315 316 /* 317 * Check to see if the named dataset is currently defined as bootable 318 */ 319 static boolean_t 320 zfs_is_bootfs(const char *name) 321 { 322 objset_t *os; 323 324 if (dmu_objset_hold(name, FTAG, &os) == 0) { 325 boolean_t ret; 326 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os))); 327 dmu_objset_rele(os, FTAG); 328 return (ret); 329 } 330 return (B_FALSE); 331 } 332 333 /* 334 * Return non-zero if the spa version is less than requested version. 335 */ 336 static int 337 zfs_earlier_version(const char *name, int version) 338 { 339 spa_t *spa; 340 341 if (spa_open(name, &spa, FTAG) == 0) { 342 if (spa_version(spa) < version) { 343 spa_close(spa, FTAG); 344 return (1); 345 } 346 spa_close(spa, FTAG); 347 } 348 return (0); 349 } 350 351 /* 352 * Return TRUE if the ZPL version is less than requested version. 353 */ 354 static boolean_t 355 zpl_earlier_version(const char *name, int version) 356 { 357 objset_t *os; 358 boolean_t rc = B_TRUE; 359 360 if (dmu_objset_hold(name, FTAG, &os) == 0) { 361 uint64_t zplversion; 362 363 if (dmu_objset_type(os) != DMU_OST_ZFS) { 364 dmu_objset_rele(os, FTAG); 365 return (B_TRUE); 366 } 367 /* XXX reading from non-owned objset */ 368 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0) 369 rc = zplversion < version; 370 dmu_objset_rele(os, FTAG); 371 } 372 return (rc); 373 } 374 375 static void 376 zfs_log_history(zfs_cmd_t *zc) 377 { 378 spa_t *spa; 379 char *buf; 380 381 if ((buf = history_str_get(zc)) == NULL) 382 return; 383 384 if (spa_open(zc->zc_name, &spa, FTAG) == 0) { 385 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) 386 (void) spa_history_log(spa, buf); 387 spa_close(spa, FTAG); 388 } 389 history_str_free(buf); 390 } 391 392 /* 393 * Policy for top-level read operations (list pools). Requires no privileges, 394 * and can be used in the local zone, as there is no associated dataset. 395 */ 396 /* ARGSUSED */ 397 static int 398 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 399 { 400 return (0); 401 } 402 403 /* 404 * Policy for dataset read operations (list children, get statistics). Requires 405 * no privileges, but must be visible in the local zone. 406 */ 407 /* ARGSUSED */ 408 static int 409 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 410 { 411 if (INGLOBALZONE(curproc) || 412 zone_dataset_visible(zc->zc_name, NULL)) 413 return (0); 414 415 return (SET_ERROR(ENOENT)); 416 } 417 418 static int 419 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr) 420 { 421 int writable = 1; 422 423 /* 424 * The dataset must be visible by this zone -- check this first 425 * so they don't see EPERM on something they shouldn't know about. 426 */ 427 if (!INGLOBALZONE(curproc) && 428 !zone_dataset_visible(dataset, &writable)) 429 return (SET_ERROR(ENOENT)); 430 431 if (INGLOBALZONE(curproc)) { 432 /* 433 * If the fs is zoned, only root can access it from the 434 * global zone. 435 */ 436 if (secpolicy_zfs(cr) && zoned) 437 return (SET_ERROR(EPERM)); 438 } else { 439 /* 440 * If we are in a local zone, the 'zoned' property must be set. 441 */ 442 if (!zoned) 443 return (SET_ERROR(EPERM)); 444 445 /* must be writable by this zone */ 446 if (!writable) 447 return (SET_ERROR(EPERM)); 448 } 449 return (0); 450 } 451 452 static int 453 zfs_dozonecheck(const char *dataset, cred_t *cr) 454 { 455 uint64_t zoned; 456 457 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL)) 458 return (SET_ERROR(ENOENT)); 459 460 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 461 } 462 463 static int 464 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr) 465 { 466 uint64_t zoned; 467 468 if (dsl_prop_get_int_ds(ds, "zoned", &zoned)) 469 return (SET_ERROR(ENOENT)); 470 471 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 472 } 473 474 static int 475 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds, 476 const char *perm, cred_t *cr) 477 { 478 int error; 479 480 error = zfs_dozonecheck_ds(name, ds, cr); 481 if (error == 0) { 482 error = secpolicy_zfs(cr); 483 if (error != 0) 484 error = dsl_deleg_access_impl(ds, perm, cr); 485 } 486 return (error); 487 } 488 489 static int 490 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) 491 { 492 int error; 493 dsl_dataset_t *ds; 494 dsl_pool_t *dp; 495 496 /* 497 * First do a quick check for root in the global zone, which 498 * is allowed to do all write_perms. This ensures that zfs_ioc_* 499 * will get to handle nonexistent datasets. 500 */ 501 if (INGLOBALZONE(curproc) && secpolicy_zfs(cr) == 0) 502 return (0); 503 504 error = dsl_pool_hold(name, FTAG, &dp); 505 if (error != 0) 506 return (error); 507 508 error = dsl_dataset_hold(dp, name, FTAG, &ds); 509 if (error != 0) { 510 dsl_pool_rele(dp, FTAG); 511 return (error); 512 } 513 514 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr); 515 516 dsl_dataset_rele(ds, FTAG); 517 dsl_pool_rele(dp, FTAG); 518 return (error); 519 } 520 521 /* 522 * Policy for setting the security label property. 523 * 524 * Returns 0 for success, non-zero for access and other errors. 525 */ 526 static int 527 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr) 528 { 529 char ds_hexsl[MAXNAMELEN]; 530 bslabel_t ds_sl, new_sl; 531 boolean_t new_default = FALSE; 532 uint64_t zoned; 533 int needed_priv = -1; 534 int error; 535 536 /* First get the existing dataset label. */ 537 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 538 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 539 if (error != 0) 540 return (SET_ERROR(EPERM)); 541 542 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 543 new_default = TRUE; 544 545 /* The label must be translatable */ 546 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0)) 547 return (SET_ERROR(EINVAL)); 548 549 /* 550 * In a non-global zone, disallow attempts to set a label that 551 * doesn't match that of the zone; otherwise no other checks 552 * are needed. 553 */ 554 if (!INGLOBALZONE(curproc)) { 555 if (new_default || !blequal(&new_sl, CR_SL(CRED()))) 556 return (SET_ERROR(EPERM)); 557 return (0); 558 } 559 560 /* 561 * For global-zone datasets (i.e., those whose zoned property is 562 * "off", verify that the specified new label is valid for the 563 * global zone. 564 */ 565 if (dsl_prop_get_integer(name, 566 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 567 return (SET_ERROR(EPERM)); 568 if (!zoned) { 569 if (zfs_check_global_label(name, strval) != 0) 570 return (SET_ERROR(EPERM)); 571 } 572 573 /* 574 * If the existing dataset label is nondefault, check if the 575 * dataset is mounted (label cannot be changed while mounted). 576 * Get the zfsvfs; if there isn't one, then the dataset isn't 577 * mounted (or isn't a dataset, doesn't exist, ...). 578 */ 579 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) { 580 objset_t *os; 581 static char *setsl_tag = "setsl_tag"; 582 583 /* 584 * Try to own the dataset; abort if there is any error, 585 * (e.g., already mounted, in use, or other error). 586 */ 587 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE, 588 setsl_tag, &os); 589 if (error != 0) 590 return (SET_ERROR(EPERM)); 591 592 dmu_objset_disown(os, setsl_tag); 593 594 if (new_default) { 595 needed_priv = PRIV_FILE_DOWNGRADE_SL; 596 goto out_check; 597 } 598 599 if (hexstr_to_label(strval, &new_sl) != 0) 600 return (SET_ERROR(EPERM)); 601 602 if (blstrictdom(&ds_sl, &new_sl)) 603 needed_priv = PRIV_FILE_DOWNGRADE_SL; 604 else if (blstrictdom(&new_sl, &ds_sl)) 605 needed_priv = PRIV_FILE_UPGRADE_SL; 606 } else { 607 /* dataset currently has a default label */ 608 if (!new_default) 609 needed_priv = PRIV_FILE_UPGRADE_SL; 610 } 611 612 out_check: 613 if (needed_priv != -1) 614 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL)); 615 return (0); 616 } 617 618 static int 619 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval, 620 cred_t *cr) 621 { 622 char *strval; 623 624 /* 625 * Check permissions for special properties. 626 */ 627 switch (prop) { 628 case ZFS_PROP_ZONED: 629 /* 630 * Disallow setting of 'zoned' from within a local zone. 631 */ 632 if (!INGLOBALZONE(curproc)) 633 return (SET_ERROR(EPERM)); 634 break; 635 636 case ZFS_PROP_QUOTA: 637 case ZFS_PROP_FILESYSTEM_LIMIT: 638 case ZFS_PROP_SNAPSHOT_LIMIT: 639 if (!INGLOBALZONE(curproc)) { 640 uint64_t zoned; 641 char setpoint[ZFS_MAX_DATASET_NAME_LEN]; 642 /* 643 * Unprivileged users are allowed to modify the 644 * limit on things *under* (ie. contained by) 645 * the thing they own. 646 */ 647 if (dsl_prop_get_integer(dsname, "zoned", &zoned, 648 setpoint)) 649 return (SET_ERROR(EPERM)); 650 if (!zoned || strlen(dsname) <= strlen(setpoint)) 651 return (SET_ERROR(EPERM)); 652 } 653 break; 654 655 case ZFS_PROP_MLSLABEL: 656 if (!is_system_labeled()) 657 return (SET_ERROR(EPERM)); 658 659 if (nvpair_value_string(propval, &strval) == 0) { 660 int err; 661 662 err = zfs_set_slabel_policy(dsname, strval, CRED()); 663 if (err != 0) 664 return (err); 665 } 666 break; 667 } 668 669 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr)); 670 } 671 672 /* ARGSUSED */ 673 static int 674 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 675 { 676 int error; 677 678 error = zfs_dozonecheck(zc->zc_name, cr); 679 if (error != 0) 680 return (error); 681 682 /* 683 * permission to set permissions will be evaluated later in 684 * dsl_deleg_can_allow() 685 */ 686 return (0); 687 } 688 689 /* ARGSUSED */ 690 static int 691 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 692 { 693 return (zfs_secpolicy_write_perms(zc->zc_name, 694 ZFS_DELEG_PERM_ROLLBACK, cr)); 695 } 696 697 /* ARGSUSED */ 698 static int 699 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 700 { 701 dsl_pool_t *dp; 702 dsl_dataset_t *ds; 703 char *cp; 704 int error; 705 706 /* 707 * Generate the current snapshot name from the given objsetid, then 708 * use that name for the secpolicy/zone checks. 709 */ 710 cp = strchr(zc->zc_name, '@'); 711 if (cp == NULL) 712 return (SET_ERROR(EINVAL)); 713 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 714 if (error != 0) 715 return (error); 716 717 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 718 if (error != 0) { 719 dsl_pool_rele(dp, FTAG); 720 return (error); 721 } 722 723 dsl_dataset_name(ds, zc->zc_name); 724 725 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds, 726 ZFS_DELEG_PERM_SEND, cr); 727 dsl_dataset_rele(ds, FTAG); 728 dsl_pool_rele(dp, FTAG); 729 730 return (error); 731 } 732 733 /* ARGSUSED */ 734 static int 735 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 736 { 737 return (zfs_secpolicy_write_perms(zc->zc_name, 738 ZFS_DELEG_PERM_SEND, cr)); 739 } 740 741 /* ARGSUSED */ 742 static int 743 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 744 { 745 vnode_t *vp; 746 int error; 747 748 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 749 NO_FOLLOW, NULL, &vp)) != 0) 750 return (error); 751 752 /* Now make sure mntpnt and dataset are ZFS */ 753 754 if (vp->v_vfsp->vfs_fstype != zfsfstype || 755 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 756 zc->zc_name) != 0)) { 757 VN_RELE(vp); 758 return (SET_ERROR(EPERM)); 759 } 760 761 VN_RELE(vp); 762 return (dsl_deleg_access(zc->zc_name, 763 ZFS_DELEG_PERM_SHARE, cr)); 764 } 765 766 int 767 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 768 { 769 if (!INGLOBALZONE(curproc)) 770 return (SET_ERROR(EPERM)); 771 772 if (secpolicy_nfs(cr) == 0) { 773 return (0); 774 } else { 775 return (zfs_secpolicy_deleg_share(zc, innvl, cr)); 776 } 777 } 778 779 int 780 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 781 { 782 if (!INGLOBALZONE(curproc)) 783 return (SET_ERROR(EPERM)); 784 785 if (secpolicy_smb(cr) == 0) { 786 return (0); 787 } else { 788 return (zfs_secpolicy_deleg_share(zc, innvl, cr)); 789 } 790 } 791 792 static int 793 zfs_get_parent(const char *datasetname, char *parent, int parentsize) 794 { 795 char *cp; 796 797 /* 798 * Remove the @bla or /bla from the end of the name to get the parent. 799 */ 800 (void) strncpy(parent, datasetname, parentsize); 801 cp = strrchr(parent, '@'); 802 if (cp != NULL) { 803 cp[0] = '\0'; 804 } else { 805 cp = strrchr(parent, '/'); 806 if (cp == NULL) 807 return (SET_ERROR(ENOENT)); 808 cp[0] = '\0'; 809 } 810 811 return (0); 812 } 813 814 int 815 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 816 { 817 int error; 818 819 if ((error = zfs_secpolicy_write_perms(name, 820 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 821 return (error); 822 823 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); 824 } 825 826 /* ARGSUSED */ 827 static int 828 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 829 { 830 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); 831 } 832 833 /* 834 * Destroying snapshots with delegated permissions requires 835 * descendant mount and destroy permissions. 836 */ 837 /* ARGSUSED */ 838 static int 839 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 840 { 841 nvlist_t *snaps; 842 nvpair_t *pair, *nextpair; 843 int error = 0; 844 845 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 846 return (SET_ERROR(EINVAL)); 847 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 848 pair = nextpair) { 849 nextpair = nvlist_next_nvpair(snaps, pair); 850 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr); 851 if (error == ENOENT) { 852 /* 853 * Ignore any snapshots that don't exist (we consider 854 * them "already destroyed"). Remove the name from the 855 * nvl here in case the snapshot is created between 856 * now and when we try to destroy it (in which case 857 * we don't want to destroy it since we haven't 858 * checked for permission). 859 */ 860 fnvlist_remove_nvpair(snaps, pair); 861 error = 0; 862 } 863 if (error != 0) 864 break; 865 } 866 867 return (error); 868 } 869 870 int 871 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 872 { 873 char parentname[ZFS_MAX_DATASET_NAME_LEN]; 874 int error; 875 876 if ((error = zfs_secpolicy_write_perms(from, 877 ZFS_DELEG_PERM_RENAME, cr)) != 0) 878 return (error); 879 880 if ((error = zfs_secpolicy_write_perms(from, 881 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 882 return (error); 883 884 if ((error = zfs_get_parent(to, parentname, 885 sizeof (parentname))) != 0) 886 return (error); 887 888 if ((error = zfs_secpolicy_write_perms(parentname, 889 ZFS_DELEG_PERM_CREATE, cr)) != 0) 890 return (error); 891 892 if ((error = zfs_secpolicy_write_perms(parentname, 893 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 894 return (error); 895 896 return (error); 897 } 898 899 /* ARGSUSED */ 900 static int 901 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 902 { 903 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr)); 904 } 905 906 /* ARGSUSED */ 907 static int 908 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 909 { 910 dsl_pool_t *dp; 911 dsl_dataset_t *clone; 912 int error; 913 914 error = zfs_secpolicy_write_perms(zc->zc_name, 915 ZFS_DELEG_PERM_PROMOTE, cr); 916 if (error != 0) 917 return (error); 918 919 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 920 if (error != 0) 921 return (error); 922 923 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone); 924 925 if (error == 0) { 926 char parentname[ZFS_MAX_DATASET_NAME_LEN]; 927 dsl_dataset_t *origin = NULL; 928 dsl_dir_t *dd; 929 dd = clone->ds_dir; 930 931 error = dsl_dataset_hold_obj(dd->dd_pool, 932 dsl_dir_phys(dd)->dd_origin_obj, FTAG, &origin); 933 if (error != 0) { 934 dsl_dataset_rele(clone, FTAG); 935 dsl_pool_rele(dp, FTAG); 936 return (error); 937 } 938 939 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone, 940 ZFS_DELEG_PERM_MOUNT, cr); 941 942 dsl_dataset_name(origin, parentname); 943 if (error == 0) { 944 error = zfs_secpolicy_write_perms_ds(parentname, origin, 945 ZFS_DELEG_PERM_PROMOTE, cr); 946 } 947 dsl_dataset_rele(clone, FTAG); 948 dsl_dataset_rele(origin, FTAG); 949 } 950 dsl_pool_rele(dp, FTAG); 951 return (error); 952 } 953 954 /* ARGSUSED */ 955 static int 956 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 957 { 958 int error; 959 960 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 961 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 962 return (error); 963 964 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 965 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 966 return (error); 967 968 return (zfs_secpolicy_write_perms(zc->zc_name, 969 ZFS_DELEG_PERM_CREATE, cr)); 970 } 971 972 int 973 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 974 { 975 return (zfs_secpolicy_write_perms(name, 976 ZFS_DELEG_PERM_SNAPSHOT, cr)); 977 } 978 979 /* 980 * Check for permission to create each snapshot in the nvlist. 981 */ 982 /* ARGSUSED */ 983 static int 984 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 985 { 986 nvlist_t *snaps; 987 int error = 0; 988 nvpair_t *pair; 989 990 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 991 return (SET_ERROR(EINVAL)); 992 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 993 pair = nvlist_next_nvpair(snaps, pair)) { 994 char *name = nvpair_name(pair); 995 char *atp = strchr(name, '@'); 996 997 if (atp == NULL) { 998 error = SET_ERROR(EINVAL); 999 break; 1000 } 1001 *atp = '\0'; 1002 error = zfs_secpolicy_snapshot_perms(name, cr); 1003 *atp = '@'; 1004 if (error != 0) 1005 break; 1006 } 1007 return (error); 1008 } 1009 1010 /* 1011 * Check for permission to create each snapshot in the nvlist. 1012 */ 1013 /* ARGSUSED */ 1014 static int 1015 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1016 { 1017 int error = 0; 1018 1019 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 1020 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 1021 char *name = nvpair_name(pair); 1022 char *hashp = strchr(name, '#'); 1023 1024 if (hashp == NULL) { 1025 error = SET_ERROR(EINVAL); 1026 break; 1027 } 1028 *hashp = '\0'; 1029 error = zfs_secpolicy_write_perms(name, 1030 ZFS_DELEG_PERM_BOOKMARK, cr); 1031 *hashp = '#'; 1032 if (error != 0) 1033 break; 1034 } 1035 return (error); 1036 } 1037 1038 /* ARGSUSED */ 1039 static int 1040 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1041 { 1042 nvpair_t *pair, *nextpair; 1043 int error = 0; 1044 1045 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; 1046 pair = nextpair) { 1047 char *name = nvpair_name(pair); 1048 char *hashp = strchr(name, '#'); 1049 nextpair = nvlist_next_nvpair(innvl, pair); 1050 1051 if (hashp == NULL) { 1052 error = SET_ERROR(EINVAL); 1053 break; 1054 } 1055 1056 *hashp = '\0'; 1057 error = zfs_secpolicy_write_perms(name, 1058 ZFS_DELEG_PERM_DESTROY, cr); 1059 *hashp = '#'; 1060 if (error == ENOENT) { 1061 /* 1062 * Ignore any filesystems that don't exist (we consider 1063 * their bookmarks "already destroyed"). Remove 1064 * the name from the nvl here in case the filesystem 1065 * is created between now and when we try to destroy 1066 * the bookmark (in which case we don't want to 1067 * destroy it since we haven't checked for permission). 1068 */ 1069 fnvlist_remove_nvpair(innvl, pair); 1070 error = 0; 1071 } 1072 if (error != 0) 1073 break; 1074 } 1075 1076 return (error); 1077 } 1078 1079 /* ARGSUSED */ 1080 static int 1081 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1082 { 1083 /* 1084 * Even root must have a proper TSD so that we know what pool 1085 * to log to. 1086 */ 1087 if (tsd_get(zfs_allow_log_key) == NULL) 1088 return (SET_ERROR(EPERM)); 1089 return (0); 1090 } 1091 1092 static int 1093 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1094 { 1095 char parentname[ZFS_MAX_DATASET_NAME_LEN]; 1096 int error; 1097 char *origin; 1098 1099 if ((error = zfs_get_parent(zc->zc_name, parentname, 1100 sizeof (parentname))) != 0) 1101 return (error); 1102 1103 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 && 1104 (error = zfs_secpolicy_write_perms(origin, 1105 ZFS_DELEG_PERM_CLONE, cr)) != 0) 1106 return (error); 1107 1108 if ((error = zfs_secpolicy_write_perms(parentname, 1109 ZFS_DELEG_PERM_CREATE, cr)) != 0) 1110 return (error); 1111 1112 return (zfs_secpolicy_write_perms(parentname, 1113 ZFS_DELEG_PERM_MOUNT, cr)); 1114 } 1115 1116 /* 1117 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 1118 * SYS_CONFIG privilege, which is not available in a local zone. 1119 */ 1120 /* ARGSUSED */ 1121 static int 1122 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1123 { 1124 if (secpolicy_sys_config(cr, B_FALSE) != 0) 1125 return (SET_ERROR(EPERM)); 1126 1127 return (0); 1128 } 1129 1130 /* 1131 * Policy for object to name lookups. 1132 */ 1133 /* ARGSUSED */ 1134 static int 1135 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1136 { 1137 int error; 1138 1139 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0) 1140 return (0); 1141 1142 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr); 1143 return (error); 1144 } 1145 1146 /* 1147 * Policy for fault injection. Requires all privileges. 1148 */ 1149 /* ARGSUSED */ 1150 static int 1151 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1152 { 1153 return (secpolicy_zinject(cr)); 1154 } 1155 1156 /* ARGSUSED */ 1157 static int 1158 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1159 { 1160 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 1161 1162 if (prop == ZPROP_INVAL) { 1163 if (!zfs_prop_user(zc->zc_value)) 1164 return (SET_ERROR(EINVAL)); 1165 return (zfs_secpolicy_write_perms(zc->zc_name, 1166 ZFS_DELEG_PERM_USERPROP, cr)); 1167 } else { 1168 return (zfs_secpolicy_setprop(zc->zc_name, prop, 1169 NULL, cr)); 1170 } 1171 } 1172 1173 static int 1174 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1175 { 1176 int err = zfs_secpolicy_read(zc, innvl, cr); 1177 if (err) 1178 return (err); 1179 1180 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 1181 return (SET_ERROR(EINVAL)); 1182 1183 if (zc->zc_value[0] == 0) { 1184 /* 1185 * They are asking about a posix uid/gid. If it's 1186 * themself, allow it. 1187 */ 1188 if (zc->zc_objset_type == ZFS_PROP_USERUSED || 1189 zc->zc_objset_type == ZFS_PROP_USERQUOTA) { 1190 if (zc->zc_guid == crgetuid(cr)) 1191 return (0); 1192 } else { 1193 if (groupmember(zc->zc_guid, cr)) 1194 return (0); 1195 } 1196 } 1197 1198 return (zfs_secpolicy_write_perms(zc->zc_name, 1199 userquota_perms[zc->zc_objset_type], cr)); 1200 } 1201 1202 static int 1203 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1204 { 1205 int err = zfs_secpolicy_read(zc, innvl, cr); 1206 if (err) 1207 return (err); 1208 1209 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 1210 return (SET_ERROR(EINVAL)); 1211 1212 return (zfs_secpolicy_write_perms(zc->zc_name, 1213 userquota_perms[zc->zc_objset_type], cr)); 1214 } 1215 1216 /* ARGSUSED */ 1217 static int 1218 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1219 { 1220 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, 1221 NULL, cr)); 1222 } 1223 1224 /* ARGSUSED */ 1225 static int 1226 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1227 { 1228 nvpair_t *pair; 1229 nvlist_t *holds; 1230 int error; 1231 1232 error = nvlist_lookup_nvlist(innvl, "holds", &holds); 1233 if (error != 0) 1234 return (SET_ERROR(EINVAL)); 1235 1236 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; 1237 pair = nvlist_next_nvpair(holds, pair)) { 1238 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 1239 error = dmu_fsname(nvpair_name(pair), fsname); 1240 if (error != 0) 1241 return (error); 1242 error = zfs_secpolicy_write_perms(fsname, 1243 ZFS_DELEG_PERM_HOLD, cr); 1244 if (error != 0) 1245 return (error); 1246 } 1247 return (0); 1248 } 1249 1250 /* ARGSUSED */ 1251 static int 1252 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1253 { 1254 nvpair_t *pair; 1255 int error; 1256 1257 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; 1258 pair = nvlist_next_nvpair(innvl, pair)) { 1259 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 1260 error = dmu_fsname(nvpair_name(pair), fsname); 1261 if (error != 0) 1262 return (error); 1263 error = zfs_secpolicy_write_perms(fsname, 1264 ZFS_DELEG_PERM_RELEASE, cr); 1265 if (error != 0) 1266 return (error); 1267 } 1268 return (0); 1269 } 1270 1271 /* 1272 * Policy for allowing temporary snapshots to be taken or released 1273 */ 1274 static int 1275 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1276 { 1277 /* 1278 * A temporary snapshot is the same as a snapshot, 1279 * hold, destroy and release all rolled into one. 1280 * Delegated diff alone is sufficient that we allow this. 1281 */ 1282 int error; 1283 1284 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 1285 ZFS_DELEG_PERM_DIFF, cr)) == 0) 1286 return (0); 1287 1288 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr); 1289 if (error == 0) 1290 error = zfs_secpolicy_hold(zc, innvl, cr); 1291 if (error == 0) 1292 error = zfs_secpolicy_release(zc, innvl, cr); 1293 if (error == 0) 1294 error = zfs_secpolicy_destroy(zc, innvl, cr); 1295 return (error); 1296 } 1297 1298 /* 1299 * Returns the nvlist as specified by the user in the zfs_cmd_t. 1300 */ 1301 static int 1302 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) 1303 { 1304 char *packed; 1305 int error; 1306 nvlist_t *list = NULL; 1307 1308 /* 1309 * Read in and unpack the user-supplied nvlist. 1310 */ 1311 if (size == 0) 1312 return (SET_ERROR(EINVAL)); 1313 1314 packed = kmem_alloc(size, KM_SLEEP); 1315 1316 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, 1317 iflag)) != 0) { 1318 kmem_free(packed, size); 1319 return (SET_ERROR(EFAULT)); 1320 } 1321 1322 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 1323 kmem_free(packed, size); 1324 return (error); 1325 } 1326 1327 kmem_free(packed, size); 1328 1329 *nvp = list; 1330 return (0); 1331 } 1332 1333 /* 1334 * Reduce the size of this nvlist until it can be serialized in 'max' bytes. 1335 * Entries will be removed from the end of the nvlist, and one int32 entry 1336 * named "N_MORE_ERRORS" will be added indicating how many entries were 1337 * removed. 1338 */ 1339 static int 1340 nvlist_smush(nvlist_t *errors, size_t max) 1341 { 1342 size_t size; 1343 1344 size = fnvlist_size(errors); 1345 1346 if (size > max) { 1347 nvpair_t *more_errors; 1348 int n = 0; 1349 1350 if (max < 1024) 1351 return (SET_ERROR(ENOMEM)); 1352 1353 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0); 1354 more_errors = nvlist_prev_nvpair(errors, NULL); 1355 1356 do { 1357 nvpair_t *pair = nvlist_prev_nvpair(errors, 1358 more_errors); 1359 fnvlist_remove_nvpair(errors, pair); 1360 n++; 1361 size = fnvlist_size(errors); 1362 } while (size > max); 1363 1364 fnvlist_remove_nvpair(errors, more_errors); 1365 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n); 1366 ASSERT3U(fnvlist_size(errors), <=, max); 1367 } 1368 1369 return (0); 1370 } 1371 1372 static int 1373 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 1374 { 1375 char *packed = NULL; 1376 int error = 0; 1377 size_t size; 1378 1379 size = fnvlist_size(nvl); 1380 1381 if (size > zc->zc_nvlist_dst_size) { 1382 error = SET_ERROR(ENOMEM); 1383 } else { 1384 packed = fnvlist_pack(nvl, &size); 1385 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 1386 size, zc->zc_iflags) != 0) 1387 error = SET_ERROR(EFAULT); 1388 fnvlist_pack_free(packed, size); 1389 } 1390 1391 zc->zc_nvlist_dst_size = size; 1392 zc->zc_nvlist_dst_filled = B_TRUE; 1393 return (error); 1394 } 1395 1396 static int 1397 getzfsvfs(const char *dsname, zfsvfs_t **zfvp) 1398 { 1399 objset_t *os; 1400 int error; 1401 1402 error = dmu_objset_hold(dsname, FTAG, &os); 1403 if (error != 0) 1404 return (error); 1405 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1406 dmu_objset_rele(os, FTAG); 1407 return (SET_ERROR(EINVAL)); 1408 } 1409 1410 mutex_enter(&os->os_user_ptr_lock); 1411 *zfvp = dmu_objset_get_user(os); 1412 if (*zfvp) { 1413 VFS_HOLD((*zfvp)->z_vfs); 1414 } else { 1415 error = SET_ERROR(ESRCH); 1416 } 1417 mutex_exit(&os->os_user_ptr_lock); 1418 dmu_objset_rele(os, FTAG); 1419 return (error); 1420 } 1421 1422 /* 1423 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which 1424 * case its z_vfs will be NULL, and it will be opened as the owner. 1425 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER, 1426 * which prevents all vnode ops from running. 1427 */ 1428 static int 1429 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer) 1430 { 1431 int error = 0; 1432 1433 if (getzfsvfs(name, zfvp) != 0) 1434 error = zfsvfs_create(name, zfvp); 1435 if (error == 0) { 1436 rrm_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER : 1437 RW_READER, tag); 1438 if ((*zfvp)->z_unmounted) { 1439 /* 1440 * XXX we could probably try again, since the unmounting 1441 * thread should be just about to disassociate the 1442 * objset from the zfsvfs. 1443 */ 1444 rrm_exit(&(*zfvp)->z_teardown_lock, tag); 1445 return (SET_ERROR(EBUSY)); 1446 } 1447 } 1448 return (error); 1449 } 1450 1451 static void 1452 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) 1453 { 1454 rrm_exit(&zfsvfs->z_teardown_lock, tag); 1455 1456 if (zfsvfs->z_vfs) { 1457 VFS_RELE(zfsvfs->z_vfs); 1458 } else { 1459 dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1460 zfsvfs_free(zfsvfs); 1461 } 1462 } 1463 1464 static int 1465 zfs_ioc_pool_create(zfs_cmd_t *zc) 1466 { 1467 int error; 1468 nvlist_t *config, *props = NULL; 1469 nvlist_t *rootprops = NULL; 1470 nvlist_t *zplprops = NULL; 1471 1472 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1473 zc->zc_iflags, &config)) 1474 return (error); 1475 1476 if (zc->zc_nvlist_src_size != 0 && (error = 1477 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1478 zc->zc_iflags, &props))) { 1479 nvlist_free(config); 1480 return (error); 1481 } 1482 1483 if (props) { 1484 nvlist_t *nvl = NULL; 1485 uint64_t version = SPA_VERSION; 1486 1487 (void) nvlist_lookup_uint64(props, 1488 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); 1489 if (!SPA_VERSION_IS_SUPPORTED(version)) { 1490 error = SET_ERROR(EINVAL); 1491 goto pool_props_bad; 1492 } 1493 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); 1494 if (nvl) { 1495 error = nvlist_dup(nvl, &rootprops, KM_SLEEP); 1496 if (error != 0) { 1497 nvlist_free(config); 1498 nvlist_free(props); 1499 return (error); 1500 } 1501 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); 1502 } 1503 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1504 error = zfs_fill_zplprops_root(version, rootprops, 1505 zplprops, NULL); 1506 if (error != 0) 1507 goto pool_props_bad; 1508 } 1509 1510 error = spa_create(zc->zc_name, config, props, zplprops); 1511 1512 /* 1513 * Set the remaining root properties 1514 */ 1515 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, 1516 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) 1517 (void) spa_destroy(zc->zc_name); 1518 1519 pool_props_bad: 1520 nvlist_free(rootprops); 1521 nvlist_free(zplprops); 1522 nvlist_free(config); 1523 nvlist_free(props); 1524 1525 return (error); 1526 } 1527 1528 static int 1529 zfs_ioc_pool_destroy(zfs_cmd_t *zc) 1530 { 1531 int error; 1532 zfs_log_history(zc); 1533 error = spa_destroy(zc->zc_name); 1534 if (error == 0) 1535 zvol_remove_minors(zc->zc_name); 1536 return (error); 1537 } 1538 1539 static int 1540 zfs_ioc_pool_import(zfs_cmd_t *zc) 1541 { 1542 nvlist_t *config, *props = NULL; 1543 uint64_t guid; 1544 int error; 1545 1546 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1547 zc->zc_iflags, &config)) != 0) 1548 return (error); 1549 1550 if (zc->zc_nvlist_src_size != 0 && (error = 1551 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1552 zc->zc_iflags, &props))) { 1553 nvlist_free(config); 1554 return (error); 1555 } 1556 1557 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1558 guid != zc->zc_guid) 1559 error = SET_ERROR(EINVAL); 1560 else 1561 error = spa_import(zc->zc_name, config, props, zc->zc_cookie); 1562 1563 if (zc->zc_nvlist_dst != 0) { 1564 int err; 1565 1566 if ((err = put_nvlist(zc, config)) != 0) 1567 error = err; 1568 } 1569 1570 nvlist_free(config); 1571 1572 nvlist_free(props); 1573 1574 return (error); 1575 } 1576 1577 static int 1578 zfs_ioc_pool_export(zfs_cmd_t *zc) 1579 { 1580 int error; 1581 boolean_t force = (boolean_t)zc->zc_cookie; 1582 boolean_t hardforce = (boolean_t)zc->zc_guid; 1583 1584 zfs_log_history(zc); 1585 error = spa_export(zc->zc_name, NULL, force, hardforce); 1586 if (error == 0) 1587 zvol_remove_minors(zc->zc_name); 1588 return (error); 1589 } 1590 1591 static int 1592 zfs_ioc_pool_configs(zfs_cmd_t *zc) 1593 { 1594 nvlist_t *configs; 1595 int error; 1596 1597 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 1598 return (SET_ERROR(EEXIST)); 1599 1600 error = put_nvlist(zc, configs); 1601 1602 nvlist_free(configs); 1603 1604 return (error); 1605 } 1606 1607 /* 1608 * inputs: 1609 * zc_name name of the pool 1610 * 1611 * outputs: 1612 * zc_cookie real errno 1613 * zc_nvlist_dst config nvlist 1614 * zc_nvlist_dst_size size of config nvlist 1615 */ 1616 static int 1617 zfs_ioc_pool_stats(zfs_cmd_t *zc) 1618 { 1619 nvlist_t *config; 1620 int error; 1621 int ret = 0; 1622 1623 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 1624 sizeof (zc->zc_value)); 1625 1626 if (config != NULL) { 1627 ret = put_nvlist(zc, config); 1628 nvlist_free(config); 1629 1630 /* 1631 * The config may be present even if 'error' is non-zero. 1632 * In this case we return success, and preserve the real errno 1633 * in 'zc_cookie'. 1634 */ 1635 zc->zc_cookie = error; 1636 } else { 1637 ret = error; 1638 } 1639 1640 return (ret); 1641 } 1642 1643 /* 1644 * Try to import the given pool, returning pool stats as appropriate so that 1645 * user land knows which devices are available and overall pool health. 1646 */ 1647 static int 1648 zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 1649 { 1650 nvlist_t *tryconfig, *config; 1651 int error; 1652 1653 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1654 zc->zc_iflags, &tryconfig)) != 0) 1655 return (error); 1656 1657 config = spa_tryimport(tryconfig); 1658 1659 nvlist_free(tryconfig); 1660 1661 if (config == NULL) 1662 return (SET_ERROR(EINVAL)); 1663 1664 error = put_nvlist(zc, config); 1665 nvlist_free(config); 1666 1667 return (error); 1668 } 1669 1670 /* 1671 * inputs: 1672 * zc_name name of the pool 1673 * zc_cookie scan func (pool_scan_func_t) 1674 */ 1675 static int 1676 zfs_ioc_pool_scan(zfs_cmd_t *zc) 1677 { 1678 spa_t *spa; 1679 int error; 1680 1681 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1682 return (error); 1683 1684 if (zc->zc_cookie == POOL_SCAN_NONE) 1685 error = spa_scan_stop(spa); 1686 else 1687 error = spa_scan(spa, zc->zc_cookie); 1688 1689 spa_close(spa, FTAG); 1690 1691 return (error); 1692 } 1693 1694 static int 1695 zfs_ioc_pool_freeze(zfs_cmd_t *zc) 1696 { 1697 spa_t *spa; 1698 int error; 1699 1700 error = spa_open(zc->zc_name, &spa, FTAG); 1701 if (error == 0) { 1702 spa_freeze(spa); 1703 spa_close(spa, FTAG); 1704 } 1705 return (error); 1706 } 1707 1708 static int 1709 zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 1710 { 1711 spa_t *spa; 1712 int error; 1713 1714 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1715 return (error); 1716 1717 if (zc->zc_cookie < spa_version(spa) || 1718 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) { 1719 spa_close(spa, FTAG); 1720 return (SET_ERROR(EINVAL)); 1721 } 1722 1723 spa_upgrade(spa, zc->zc_cookie); 1724 spa_close(spa, FTAG); 1725 1726 return (error); 1727 } 1728 1729 static int 1730 zfs_ioc_pool_get_history(zfs_cmd_t *zc) 1731 { 1732 spa_t *spa; 1733 char *hist_buf; 1734 uint64_t size; 1735 int error; 1736 1737 if ((size = zc->zc_history_len) == 0) 1738 return (SET_ERROR(EINVAL)); 1739 1740 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1741 return (error); 1742 1743 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 1744 spa_close(spa, FTAG); 1745 return (SET_ERROR(ENOTSUP)); 1746 } 1747 1748 hist_buf = kmem_alloc(size, KM_SLEEP); 1749 if ((error = spa_history_get(spa, &zc->zc_history_offset, 1750 &zc->zc_history_len, hist_buf)) == 0) { 1751 error = ddi_copyout(hist_buf, 1752 (void *)(uintptr_t)zc->zc_history, 1753 zc->zc_history_len, zc->zc_iflags); 1754 } 1755 1756 spa_close(spa, FTAG); 1757 kmem_free(hist_buf, size); 1758 return (error); 1759 } 1760 1761 static int 1762 zfs_ioc_pool_reguid(zfs_cmd_t *zc) 1763 { 1764 spa_t *spa; 1765 int error; 1766 1767 error = spa_open(zc->zc_name, &spa, FTAG); 1768 if (error == 0) { 1769 error = spa_change_guid(spa); 1770 spa_close(spa, FTAG); 1771 } 1772 return (error); 1773 } 1774 1775 static int 1776 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 1777 { 1778 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)); 1779 } 1780 1781 /* 1782 * inputs: 1783 * zc_name name of filesystem 1784 * zc_obj object to find 1785 * 1786 * outputs: 1787 * zc_value name of object 1788 */ 1789 static int 1790 zfs_ioc_obj_to_path(zfs_cmd_t *zc) 1791 { 1792 objset_t *os; 1793 int error; 1794 1795 /* XXX reading from objset not owned */ 1796 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1797 return (error); 1798 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1799 dmu_objset_rele(os, FTAG); 1800 return (SET_ERROR(EINVAL)); 1801 } 1802 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, 1803 sizeof (zc->zc_value)); 1804 dmu_objset_rele(os, FTAG); 1805 1806 return (error); 1807 } 1808 1809 /* 1810 * inputs: 1811 * zc_name name of filesystem 1812 * zc_obj object to find 1813 * 1814 * outputs: 1815 * zc_stat stats on object 1816 * zc_value path to object 1817 */ 1818 static int 1819 zfs_ioc_obj_to_stats(zfs_cmd_t *zc) 1820 { 1821 objset_t *os; 1822 int error; 1823 1824 /* XXX reading from objset not owned */ 1825 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1826 return (error); 1827 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1828 dmu_objset_rele(os, FTAG); 1829 return (SET_ERROR(EINVAL)); 1830 } 1831 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value, 1832 sizeof (zc->zc_value)); 1833 dmu_objset_rele(os, FTAG); 1834 1835 return (error); 1836 } 1837 1838 static int 1839 zfs_ioc_vdev_add(zfs_cmd_t *zc) 1840 { 1841 spa_t *spa; 1842 int error; 1843 nvlist_t *config, **l2cache, **spares; 1844 uint_t nl2cache = 0, nspares = 0; 1845 1846 error = spa_open(zc->zc_name, &spa, FTAG); 1847 if (error != 0) 1848 return (error); 1849 1850 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1851 zc->zc_iflags, &config); 1852 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, 1853 &l2cache, &nl2cache); 1854 1855 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, 1856 &spares, &nspares); 1857 1858 /* 1859 * A root pool with concatenated devices is not supported. 1860 * Thus, can not add a device to a root pool. 1861 * 1862 * Intent log device can not be added to a rootpool because 1863 * during mountroot, zil is replayed, a seperated log device 1864 * can not be accessed during the mountroot time. 1865 * 1866 * l2cache and spare devices are ok to be added to a rootpool. 1867 */ 1868 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { 1869 nvlist_free(config); 1870 spa_close(spa, FTAG); 1871 return (SET_ERROR(EDOM)); 1872 } 1873 1874 if (error == 0) { 1875 error = spa_vdev_add(spa, config); 1876 nvlist_free(config); 1877 } 1878 spa_close(spa, FTAG); 1879 return (error); 1880 } 1881 1882 /* 1883 * inputs: 1884 * zc_name name of the pool 1885 * zc_nvlist_conf nvlist of devices to remove 1886 * zc_cookie to stop the remove? 1887 */ 1888 static int 1889 zfs_ioc_vdev_remove(zfs_cmd_t *zc) 1890 { 1891 spa_t *spa; 1892 int error; 1893 1894 error = spa_open(zc->zc_name, &spa, FTAG); 1895 if (error != 0) 1896 return (error); 1897 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 1898 spa_close(spa, FTAG); 1899 return (error); 1900 } 1901 1902 static int 1903 zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 1904 { 1905 spa_t *spa; 1906 int error; 1907 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 1908 1909 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1910 return (error); 1911 switch (zc->zc_cookie) { 1912 case VDEV_STATE_ONLINE: 1913 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 1914 break; 1915 1916 case VDEV_STATE_OFFLINE: 1917 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 1918 break; 1919 1920 case VDEV_STATE_FAULTED: 1921 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1922 zc->zc_obj != VDEV_AUX_EXTERNAL) 1923 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1924 1925 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); 1926 break; 1927 1928 case VDEV_STATE_DEGRADED: 1929 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1930 zc->zc_obj != VDEV_AUX_EXTERNAL) 1931 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1932 1933 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj); 1934 break; 1935 1936 default: 1937 error = SET_ERROR(EINVAL); 1938 } 1939 zc->zc_cookie = newstate; 1940 spa_close(spa, FTAG); 1941 return (error); 1942 } 1943 1944 static int 1945 zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1946 { 1947 spa_t *spa; 1948 int replacing = zc->zc_cookie; 1949 nvlist_t *config; 1950 int error; 1951 1952 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1953 return (error); 1954 1955 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1956 zc->zc_iflags, &config)) == 0) { 1957 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 1958 nvlist_free(config); 1959 } 1960 1961 spa_close(spa, FTAG); 1962 return (error); 1963 } 1964 1965 static int 1966 zfs_ioc_vdev_detach(zfs_cmd_t *zc) 1967 { 1968 spa_t *spa; 1969 int error; 1970 1971 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1972 return (error); 1973 1974 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); 1975 1976 spa_close(spa, FTAG); 1977 return (error); 1978 } 1979 1980 static int 1981 zfs_ioc_vdev_split(zfs_cmd_t *zc) 1982 { 1983 spa_t *spa; 1984 nvlist_t *config, *props = NULL; 1985 int error; 1986 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT); 1987 1988 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1989 return (error); 1990 1991 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1992 zc->zc_iflags, &config)) { 1993 spa_close(spa, FTAG); 1994 return (error); 1995 } 1996 1997 if (zc->zc_nvlist_src_size != 0 && (error = 1998 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1999 zc->zc_iflags, &props))) { 2000 spa_close(spa, FTAG); 2001 nvlist_free(config); 2002 return (error); 2003 } 2004 2005 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp); 2006 2007 spa_close(spa, FTAG); 2008 2009 nvlist_free(config); 2010 nvlist_free(props); 2011 2012 return (error); 2013 } 2014 2015 static int 2016 zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 2017 { 2018 spa_t *spa; 2019 char *path = zc->zc_value; 2020 uint64_t guid = zc->zc_guid; 2021 int error; 2022 2023 error = spa_open(zc->zc_name, &spa, FTAG); 2024 if (error != 0) 2025 return (error); 2026 2027 error = spa_vdev_setpath(spa, guid, path); 2028 spa_close(spa, FTAG); 2029 return (error); 2030 } 2031 2032 static int 2033 zfs_ioc_vdev_setfru(zfs_cmd_t *zc) 2034 { 2035 spa_t *spa; 2036 char *fru = zc->zc_value; 2037 uint64_t guid = zc->zc_guid; 2038 int error; 2039 2040 error = spa_open(zc->zc_name, &spa, FTAG); 2041 if (error != 0) 2042 return (error); 2043 2044 error = spa_vdev_setfru(spa, guid, fru); 2045 spa_close(spa, FTAG); 2046 return (error); 2047 } 2048 2049 static int 2050 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os) 2051 { 2052 int error = 0; 2053 nvlist_t *nv; 2054 2055 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 2056 2057 if (zc->zc_nvlist_dst != 0 && 2058 (error = dsl_prop_get_all(os, &nv)) == 0) { 2059 dmu_objset_stats(os, nv); 2060 /* 2061 * NB: zvol_get_stats() will read the objset contents, 2062 * which we aren't supposed to do with a 2063 * DS_MODE_USER hold, because it could be 2064 * inconsistent. So this is a bit of a workaround... 2065 * XXX reading with out owning 2066 */ 2067 if (!zc->zc_objset_stats.dds_inconsistent && 2068 dmu_objset_type(os) == DMU_OST_ZVOL) { 2069 error = zvol_get_stats(os, nv); 2070 if (error == EIO) 2071 return (error); 2072 VERIFY0(error); 2073 } 2074 error = put_nvlist(zc, nv); 2075 nvlist_free(nv); 2076 } 2077 2078 return (error); 2079 } 2080 2081 /* 2082 * inputs: 2083 * zc_name name of filesystem 2084 * zc_nvlist_dst_size size of buffer for property nvlist 2085 * 2086 * outputs: 2087 * zc_objset_stats stats 2088 * zc_nvlist_dst property nvlist 2089 * zc_nvlist_dst_size size of property nvlist 2090 */ 2091 static int 2092 zfs_ioc_objset_stats(zfs_cmd_t *zc) 2093 { 2094 objset_t *os; 2095 int error; 2096 2097 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2098 if (error == 0) { 2099 error = zfs_ioc_objset_stats_impl(zc, os); 2100 dmu_objset_rele(os, FTAG); 2101 } 2102 2103 return (error); 2104 } 2105 2106 /* 2107 * inputs: 2108 * zc_name name of filesystem 2109 * zc_nvlist_dst_size size of buffer for property nvlist 2110 * 2111 * outputs: 2112 * zc_nvlist_dst received property nvlist 2113 * zc_nvlist_dst_size size of received property nvlist 2114 * 2115 * Gets received properties (distinct from local properties on or after 2116 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from 2117 * local property values. 2118 */ 2119 static int 2120 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) 2121 { 2122 int error = 0; 2123 nvlist_t *nv; 2124 2125 /* 2126 * Without this check, we would return local property values if the 2127 * caller has not already received properties on or after 2128 * SPA_VERSION_RECVD_PROPS. 2129 */ 2130 if (!dsl_prop_get_hasrecvd(zc->zc_name)) 2131 return (SET_ERROR(ENOTSUP)); 2132 2133 if (zc->zc_nvlist_dst != 0 && 2134 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) { 2135 error = put_nvlist(zc, nv); 2136 nvlist_free(nv); 2137 } 2138 2139 return (error); 2140 } 2141 2142 static int 2143 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) 2144 { 2145 uint64_t value; 2146 int error; 2147 2148 /* 2149 * zfs_get_zplprop() will either find a value or give us 2150 * the default value (if there is one). 2151 */ 2152 if ((error = zfs_get_zplprop(os, prop, &value)) != 0) 2153 return (error); 2154 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); 2155 return (0); 2156 } 2157 2158 /* 2159 * inputs: 2160 * zc_name name of filesystem 2161 * zc_nvlist_dst_size size of buffer for zpl property nvlist 2162 * 2163 * outputs: 2164 * zc_nvlist_dst zpl property nvlist 2165 * zc_nvlist_dst_size size of zpl property nvlist 2166 */ 2167 static int 2168 zfs_ioc_objset_zplprops(zfs_cmd_t *zc) 2169 { 2170 objset_t *os; 2171 int err; 2172 2173 /* XXX reading without owning */ 2174 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) 2175 return (err); 2176 2177 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 2178 2179 /* 2180 * NB: nvl_add_zplprop() will read the objset contents, 2181 * which we aren't supposed to do with a DS_MODE_USER 2182 * hold, because it could be inconsistent. 2183 */ 2184 if (zc->zc_nvlist_dst != NULL && 2185 !zc->zc_objset_stats.dds_inconsistent && 2186 dmu_objset_type(os) == DMU_OST_ZFS) { 2187 nvlist_t *nv; 2188 2189 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2190 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && 2191 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && 2192 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && 2193 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) 2194 err = put_nvlist(zc, nv); 2195 nvlist_free(nv); 2196 } else { 2197 err = SET_ERROR(ENOENT); 2198 } 2199 dmu_objset_rele(os, FTAG); 2200 return (err); 2201 } 2202 2203 static boolean_t 2204 dataset_name_hidden(const char *name) 2205 { 2206 /* 2207 * Skip over datasets that are not visible in this zone, 2208 * internal datasets (which have a $ in their name), and 2209 * temporary datasets (which have a % in their name). 2210 */ 2211 if (strchr(name, '$') != NULL) 2212 return (B_TRUE); 2213 if (strchr(name, '%') != NULL) 2214 return (B_TRUE); 2215 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 2216 return (B_TRUE); 2217 return (B_FALSE); 2218 } 2219 2220 /* 2221 * inputs: 2222 * zc_name name of filesystem 2223 * zc_cookie zap cursor 2224 * zc_nvlist_dst_size size of buffer for property nvlist 2225 * 2226 * outputs: 2227 * zc_name name of next filesystem 2228 * zc_cookie zap cursor 2229 * zc_objset_stats stats 2230 * zc_nvlist_dst property nvlist 2231 * zc_nvlist_dst_size size of property nvlist 2232 */ 2233 static int 2234 zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 2235 { 2236 objset_t *os; 2237 int error; 2238 char *p; 2239 size_t orig_len = strlen(zc->zc_name); 2240 2241 top: 2242 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { 2243 if (error == ENOENT) 2244 error = SET_ERROR(ESRCH); 2245 return (error); 2246 } 2247 2248 p = strrchr(zc->zc_name, '/'); 2249 if (p == NULL || p[1] != '\0') 2250 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 2251 p = zc->zc_name + strlen(zc->zc_name); 2252 2253 do { 2254 error = dmu_dir_list_next(os, 2255 sizeof (zc->zc_name) - (p - zc->zc_name), p, 2256 NULL, &zc->zc_cookie); 2257 if (error == ENOENT) 2258 error = SET_ERROR(ESRCH); 2259 } while (error == 0 && dataset_name_hidden(zc->zc_name)); 2260 dmu_objset_rele(os, FTAG); 2261 2262 /* 2263 * If it's an internal dataset (ie. with a '$' in its name), 2264 * don't try to get stats for it, otherwise we'll return ENOENT. 2265 */ 2266 if (error == 0 && strchr(zc->zc_name, '$') == NULL) { 2267 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 2268 if (error == ENOENT) { 2269 /* We lost a race with destroy, get the next one. */ 2270 zc->zc_name[orig_len] = '\0'; 2271 goto top; 2272 } 2273 } 2274 return (error); 2275 } 2276 2277 /* 2278 * inputs: 2279 * zc_name name of filesystem 2280 * zc_cookie zap cursor 2281 * zc_nvlist_dst_size size of buffer for property nvlist 2282 * zc_simple when set, only name is requested 2283 * 2284 * outputs: 2285 * zc_name name of next snapshot 2286 * zc_objset_stats stats 2287 * zc_nvlist_dst property nvlist 2288 * zc_nvlist_dst_size size of property nvlist 2289 */ 2290 static int 2291 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 2292 { 2293 objset_t *os; 2294 int error; 2295 2296 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2297 if (error != 0) { 2298 return (error == ENOENT ? ESRCH : error); 2299 } 2300 2301 /* 2302 * A dataset name of maximum length cannot have any snapshots, 2303 * so exit immediately. 2304 */ 2305 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= 2306 ZFS_MAX_DATASET_NAME_LEN) { 2307 dmu_objset_rele(os, FTAG); 2308 return (SET_ERROR(ESRCH)); 2309 } 2310 2311 error = dmu_snapshot_list_next(os, 2312 sizeof (zc->zc_name) - strlen(zc->zc_name), 2313 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie, 2314 NULL); 2315 2316 if (error == 0 && !zc->zc_simple) { 2317 dsl_dataset_t *ds; 2318 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool; 2319 2320 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds); 2321 if (error == 0) { 2322 objset_t *ossnap; 2323 2324 error = dmu_objset_from_ds(ds, &ossnap); 2325 if (error == 0) 2326 error = zfs_ioc_objset_stats_impl(zc, ossnap); 2327 dsl_dataset_rele(ds, FTAG); 2328 } 2329 } else if (error == ENOENT) { 2330 error = SET_ERROR(ESRCH); 2331 } 2332 2333 dmu_objset_rele(os, FTAG); 2334 /* if we failed, undo the @ that we tacked on to zc_name */ 2335 if (error != 0) 2336 *strchr(zc->zc_name, '@') = '\0'; 2337 return (error); 2338 } 2339 2340 static int 2341 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) 2342 { 2343 const char *propname = nvpair_name(pair); 2344 uint64_t *valary; 2345 unsigned int vallen; 2346 const char *domain; 2347 char *dash; 2348 zfs_userquota_prop_t type; 2349 uint64_t rid; 2350 uint64_t quota; 2351 zfsvfs_t *zfsvfs; 2352 int err; 2353 2354 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2355 nvlist_t *attrs; 2356 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2357 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2358 &pair) != 0) 2359 return (SET_ERROR(EINVAL)); 2360 } 2361 2362 /* 2363 * A correctly constructed propname is encoded as 2364 * userquota@<rid>-<domain>. 2365 */ 2366 if ((dash = strchr(propname, '-')) == NULL || 2367 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 || 2368 vallen != 3) 2369 return (SET_ERROR(EINVAL)); 2370 2371 domain = dash + 1; 2372 type = valary[0]; 2373 rid = valary[1]; 2374 quota = valary[2]; 2375 2376 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE); 2377 if (err == 0) { 2378 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); 2379 zfsvfs_rele(zfsvfs, FTAG); 2380 } 2381 2382 return (err); 2383 } 2384 2385 /* 2386 * If the named property is one that has a special function to set its value, 2387 * return 0 on success and a positive error code on failure; otherwise if it is 2388 * not one of the special properties handled by this function, return -1. 2389 * 2390 * XXX: It would be better for callers of the property interface if we handled 2391 * these special cases in dsl_prop.c (in the dsl layer). 2392 */ 2393 static int 2394 zfs_prop_set_special(const char *dsname, zprop_source_t source, 2395 nvpair_t *pair) 2396 { 2397 const char *propname = nvpair_name(pair); 2398 zfs_prop_t prop = zfs_name_to_prop(propname); 2399 uint64_t intval; 2400 int err = -1; 2401 2402 if (prop == ZPROP_INVAL) { 2403 if (zfs_prop_userquota(propname)) 2404 return (zfs_prop_set_userquota(dsname, pair)); 2405 return (-1); 2406 } 2407 2408 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2409 nvlist_t *attrs; 2410 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2411 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2412 &pair) == 0); 2413 } 2414 2415 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) 2416 return (-1); 2417 2418 VERIFY(0 == nvpair_value_uint64(pair, &intval)); 2419 2420 switch (prop) { 2421 case ZFS_PROP_QUOTA: 2422 err = dsl_dir_set_quota(dsname, source, intval); 2423 break; 2424 case ZFS_PROP_REFQUOTA: 2425 err = dsl_dataset_set_refquota(dsname, source, intval); 2426 break; 2427 case ZFS_PROP_FILESYSTEM_LIMIT: 2428 case ZFS_PROP_SNAPSHOT_LIMIT: 2429 if (intval == UINT64_MAX) { 2430 /* clearing the limit, just do it */ 2431 err = 0; 2432 } else { 2433 err = dsl_dir_activate_fs_ss_limit(dsname); 2434 } 2435 /* 2436 * Set err to -1 to force the zfs_set_prop_nvlist code down the 2437 * default path to set the value in the nvlist. 2438 */ 2439 if (err == 0) 2440 err = -1; 2441 break; 2442 case ZFS_PROP_RESERVATION: 2443 err = dsl_dir_set_reservation(dsname, source, intval); 2444 break; 2445 case ZFS_PROP_REFRESERVATION: 2446 err = dsl_dataset_set_refreservation(dsname, source, intval); 2447 break; 2448 case ZFS_PROP_VOLSIZE: 2449 err = zvol_set_volsize(dsname, intval); 2450 break; 2451 case ZFS_PROP_VERSION: 2452 { 2453 zfsvfs_t *zfsvfs; 2454 2455 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0) 2456 break; 2457 2458 err = zfs_set_version(zfsvfs, intval); 2459 zfsvfs_rele(zfsvfs, FTAG); 2460 2461 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { 2462 zfs_cmd_t *zc; 2463 2464 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 2465 (void) strcpy(zc->zc_name, dsname); 2466 (void) zfs_ioc_userspace_upgrade(zc); 2467 kmem_free(zc, sizeof (zfs_cmd_t)); 2468 } 2469 break; 2470 } 2471 default: 2472 err = -1; 2473 } 2474 2475 return (err); 2476 } 2477 2478 /* 2479 * This function is best effort. If it fails to set any of the given properties, 2480 * it continues to set as many as it can and returns the last error 2481 * encountered. If the caller provides a non-NULL errlist, it will be filled in 2482 * with the list of names of all the properties that failed along with the 2483 * corresponding error numbers. 2484 * 2485 * If every property is set successfully, zero is returned and errlist is not 2486 * modified. 2487 */ 2488 int 2489 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, 2490 nvlist_t *errlist) 2491 { 2492 nvpair_t *pair; 2493 nvpair_t *propval; 2494 int rv = 0; 2495 uint64_t intval; 2496 char *strval; 2497 nvlist_t *genericnvl = fnvlist_alloc(); 2498 nvlist_t *retrynvl = fnvlist_alloc(); 2499 2500 retry: 2501 pair = NULL; 2502 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2503 const char *propname = nvpair_name(pair); 2504 zfs_prop_t prop = zfs_name_to_prop(propname); 2505 int err = 0; 2506 2507 /* decode the property value */ 2508 propval = pair; 2509 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2510 nvlist_t *attrs; 2511 attrs = fnvpair_value_nvlist(pair); 2512 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2513 &propval) != 0) 2514 err = SET_ERROR(EINVAL); 2515 } 2516 2517 /* Validate value type */ 2518 if (err == 0 && prop == ZPROP_INVAL) { 2519 if (zfs_prop_user(propname)) { 2520 if (nvpair_type(propval) != DATA_TYPE_STRING) 2521 err = SET_ERROR(EINVAL); 2522 } else if (zfs_prop_userquota(propname)) { 2523 if (nvpair_type(propval) != 2524 DATA_TYPE_UINT64_ARRAY) 2525 err = SET_ERROR(EINVAL); 2526 } else { 2527 err = SET_ERROR(EINVAL); 2528 } 2529 } else if (err == 0) { 2530 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2531 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) 2532 err = SET_ERROR(EINVAL); 2533 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { 2534 const char *unused; 2535 2536 intval = fnvpair_value_uint64(propval); 2537 2538 switch (zfs_prop_get_type(prop)) { 2539 case PROP_TYPE_NUMBER: 2540 break; 2541 case PROP_TYPE_STRING: 2542 err = SET_ERROR(EINVAL); 2543 break; 2544 case PROP_TYPE_INDEX: 2545 if (zfs_prop_index_to_string(prop, 2546 intval, &unused) != 0) 2547 err = SET_ERROR(EINVAL); 2548 break; 2549 default: 2550 cmn_err(CE_PANIC, 2551 "unknown property type"); 2552 } 2553 } else { 2554 err = SET_ERROR(EINVAL); 2555 } 2556 } 2557 2558 /* Validate permissions */ 2559 if (err == 0) 2560 err = zfs_check_settable(dsname, pair, CRED()); 2561 2562 if (err == 0) { 2563 err = zfs_prop_set_special(dsname, source, pair); 2564 if (err == -1) { 2565 /* 2566 * For better performance we build up a list of 2567 * properties to set in a single transaction. 2568 */ 2569 err = nvlist_add_nvpair(genericnvl, pair); 2570 } else if (err != 0 && nvl != retrynvl) { 2571 /* 2572 * This may be a spurious error caused by 2573 * receiving quota and reservation out of order. 2574 * Try again in a second pass. 2575 */ 2576 err = nvlist_add_nvpair(retrynvl, pair); 2577 } 2578 } 2579 2580 if (err != 0) { 2581 if (errlist != NULL) 2582 fnvlist_add_int32(errlist, propname, err); 2583 rv = err; 2584 } 2585 } 2586 2587 if (nvl != retrynvl && !nvlist_empty(retrynvl)) { 2588 nvl = retrynvl; 2589 goto retry; 2590 } 2591 2592 if (!nvlist_empty(genericnvl) && 2593 dsl_props_set(dsname, source, genericnvl) != 0) { 2594 /* 2595 * If this fails, we still want to set as many properties as we 2596 * can, so try setting them individually. 2597 */ 2598 pair = NULL; 2599 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { 2600 const char *propname = nvpair_name(pair); 2601 int err = 0; 2602 2603 propval = pair; 2604 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2605 nvlist_t *attrs; 2606 attrs = fnvpair_value_nvlist(pair); 2607 propval = fnvlist_lookup_nvpair(attrs, 2608 ZPROP_VALUE); 2609 } 2610 2611 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2612 strval = fnvpair_value_string(propval); 2613 err = dsl_prop_set_string(dsname, propname, 2614 source, strval); 2615 } else { 2616 intval = fnvpair_value_uint64(propval); 2617 err = dsl_prop_set_int(dsname, propname, source, 2618 intval); 2619 } 2620 2621 if (err != 0) { 2622 if (errlist != NULL) { 2623 fnvlist_add_int32(errlist, propname, 2624 err); 2625 } 2626 rv = err; 2627 } 2628 } 2629 } 2630 nvlist_free(genericnvl); 2631 nvlist_free(retrynvl); 2632 2633 return (rv); 2634 } 2635 2636 /* 2637 * Check that all the properties are valid user properties. 2638 */ 2639 static int 2640 zfs_check_userprops(const char *fsname, nvlist_t *nvl) 2641 { 2642 nvpair_t *pair = NULL; 2643 int error = 0; 2644 2645 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2646 const char *propname = nvpair_name(pair); 2647 2648 if (!zfs_prop_user(propname) || 2649 nvpair_type(pair) != DATA_TYPE_STRING) 2650 return (SET_ERROR(EINVAL)); 2651 2652 if (error = zfs_secpolicy_write_perms(fsname, 2653 ZFS_DELEG_PERM_USERPROP, CRED())) 2654 return (error); 2655 2656 if (strlen(propname) >= ZAP_MAXNAMELEN) 2657 return (SET_ERROR(ENAMETOOLONG)); 2658 2659 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN) 2660 return (E2BIG); 2661 } 2662 return (0); 2663 } 2664 2665 static void 2666 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) 2667 { 2668 nvpair_t *pair; 2669 2670 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2671 2672 pair = NULL; 2673 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { 2674 if (nvlist_exists(skipped, nvpair_name(pair))) 2675 continue; 2676 2677 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); 2678 } 2679 } 2680 2681 static int 2682 clear_received_props(const char *dsname, nvlist_t *props, 2683 nvlist_t *skipped) 2684 { 2685 int err = 0; 2686 nvlist_t *cleared_props = NULL; 2687 props_skip(props, skipped, &cleared_props); 2688 if (!nvlist_empty(cleared_props)) { 2689 /* 2690 * Acts on local properties until the dataset has received 2691 * properties at least once on or after SPA_VERSION_RECVD_PROPS. 2692 */ 2693 zprop_source_t flags = (ZPROP_SRC_NONE | 2694 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0)); 2695 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL); 2696 } 2697 nvlist_free(cleared_props); 2698 return (err); 2699 } 2700 2701 /* 2702 * inputs: 2703 * zc_name name of filesystem 2704 * zc_value name of property to set 2705 * zc_nvlist_src{_size} nvlist of properties to apply 2706 * zc_cookie received properties flag 2707 * 2708 * outputs: 2709 * zc_nvlist_dst{_size} error for each unapplied received property 2710 */ 2711 static int 2712 zfs_ioc_set_prop(zfs_cmd_t *zc) 2713 { 2714 nvlist_t *nvl; 2715 boolean_t received = zc->zc_cookie; 2716 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : 2717 ZPROP_SRC_LOCAL); 2718 nvlist_t *errors; 2719 int error; 2720 2721 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2722 zc->zc_iflags, &nvl)) != 0) 2723 return (error); 2724 2725 if (received) { 2726 nvlist_t *origprops; 2727 2728 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) { 2729 (void) clear_received_props(zc->zc_name, 2730 origprops, nvl); 2731 nvlist_free(origprops); 2732 } 2733 2734 error = dsl_prop_set_hasrecvd(zc->zc_name); 2735 } 2736 2737 errors = fnvlist_alloc(); 2738 if (error == 0) 2739 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors); 2740 2741 if (zc->zc_nvlist_dst != NULL && errors != NULL) { 2742 (void) put_nvlist(zc, errors); 2743 } 2744 2745 nvlist_free(errors); 2746 nvlist_free(nvl); 2747 return (error); 2748 } 2749 2750 /* 2751 * inputs: 2752 * zc_name name of filesystem 2753 * zc_value name of property to inherit 2754 * zc_cookie revert to received value if TRUE 2755 * 2756 * outputs: none 2757 */ 2758 static int 2759 zfs_ioc_inherit_prop(zfs_cmd_t *zc) 2760 { 2761 const char *propname = zc->zc_value; 2762 zfs_prop_t prop = zfs_name_to_prop(propname); 2763 boolean_t received = zc->zc_cookie; 2764 zprop_source_t source = (received 2765 ? ZPROP_SRC_NONE /* revert to received value, if any */ 2766 : ZPROP_SRC_INHERITED); /* explicitly inherit */ 2767 2768 if (received) { 2769 nvlist_t *dummy; 2770 nvpair_t *pair; 2771 zprop_type_t type; 2772 int err; 2773 2774 /* 2775 * zfs_prop_set_special() expects properties in the form of an 2776 * nvpair with type info. 2777 */ 2778 if (prop == ZPROP_INVAL) { 2779 if (!zfs_prop_user(propname)) 2780 return (SET_ERROR(EINVAL)); 2781 2782 type = PROP_TYPE_STRING; 2783 } else if (prop == ZFS_PROP_VOLSIZE || 2784 prop == ZFS_PROP_VERSION) { 2785 return (SET_ERROR(EINVAL)); 2786 } else { 2787 type = zfs_prop_get_type(prop); 2788 } 2789 2790 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2791 2792 switch (type) { 2793 case PROP_TYPE_STRING: 2794 VERIFY(0 == nvlist_add_string(dummy, propname, "")); 2795 break; 2796 case PROP_TYPE_NUMBER: 2797 case PROP_TYPE_INDEX: 2798 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); 2799 break; 2800 default: 2801 nvlist_free(dummy); 2802 return (SET_ERROR(EINVAL)); 2803 } 2804 2805 pair = nvlist_next_nvpair(dummy, NULL); 2806 err = zfs_prop_set_special(zc->zc_name, source, pair); 2807 nvlist_free(dummy); 2808 if (err != -1) 2809 return (err); /* special property already handled */ 2810 } else { 2811 /* 2812 * Only check this in the non-received case. We want to allow 2813 * 'inherit -S' to revert non-inheritable properties like quota 2814 * and reservation to the received or default values even though 2815 * they are not considered inheritable. 2816 */ 2817 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) 2818 return (SET_ERROR(EINVAL)); 2819 } 2820 2821 /* property name has been validated by zfs_secpolicy_inherit_prop() */ 2822 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source)); 2823 } 2824 2825 static int 2826 zfs_ioc_pool_set_props(zfs_cmd_t *zc) 2827 { 2828 nvlist_t *props; 2829 spa_t *spa; 2830 int error; 2831 nvpair_t *pair; 2832 2833 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2834 zc->zc_iflags, &props)) 2835 return (error); 2836 2837 /* 2838 * If the only property is the configfile, then just do a spa_lookup() 2839 * to handle the faulted case. 2840 */ 2841 pair = nvlist_next_nvpair(props, NULL); 2842 if (pair != NULL && strcmp(nvpair_name(pair), 2843 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && 2844 nvlist_next_nvpair(props, pair) == NULL) { 2845 mutex_enter(&spa_namespace_lock); 2846 if ((spa = spa_lookup(zc->zc_name)) != NULL) { 2847 spa_configfile_set(spa, props, B_FALSE); 2848 spa_config_sync(spa, B_FALSE, B_TRUE); 2849 } 2850 mutex_exit(&spa_namespace_lock); 2851 if (spa != NULL) { 2852 nvlist_free(props); 2853 return (0); 2854 } 2855 } 2856 2857 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2858 nvlist_free(props); 2859 return (error); 2860 } 2861 2862 error = spa_prop_set(spa, props); 2863 2864 nvlist_free(props); 2865 spa_close(spa, FTAG); 2866 2867 return (error); 2868 } 2869 2870 static int 2871 zfs_ioc_pool_get_props(zfs_cmd_t *zc) 2872 { 2873 spa_t *spa; 2874 int error; 2875 nvlist_t *nvp = NULL; 2876 2877 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2878 /* 2879 * If the pool is faulted, there may be properties we can still 2880 * get (such as altroot and cachefile), so attempt to get them 2881 * anyway. 2882 */ 2883 mutex_enter(&spa_namespace_lock); 2884 if ((spa = spa_lookup(zc->zc_name)) != NULL) 2885 error = spa_prop_get(spa, &nvp); 2886 mutex_exit(&spa_namespace_lock); 2887 } else { 2888 error = spa_prop_get(spa, &nvp); 2889 spa_close(spa, FTAG); 2890 } 2891 2892 if (error == 0 && zc->zc_nvlist_dst != NULL) 2893 error = put_nvlist(zc, nvp); 2894 else 2895 error = SET_ERROR(EFAULT); 2896 2897 nvlist_free(nvp); 2898 return (error); 2899 } 2900 2901 /* 2902 * inputs: 2903 * zc_name name of filesystem 2904 * zc_nvlist_src{_size} nvlist of delegated permissions 2905 * zc_perm_action allow/unallow flag 2906 * 2907 * outputs: none 2908 */ 2909 static int 2910 zfs_ioc_set_fsacl(zfs_cmd_t *zc) 2911 { 2912 int error; 2913 nvlist_t *fsaclnv = NULL; 2914 2915 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2916 zc->zc_iflags, &fsaclnv)) != 0) 2917 return (error); 2918 2919 /* 2920 * Verify nvlist is constructed correctly 2921 */ 2922 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 2923 nvlist_free(fsaclnv); 2924 return (SET_ERROR(EINVAL)); 2925 } 2926 2927 /* 2928 * If we don't have PRIV_SYS_MOUNT, then validate 2929 * that user is allowed to hand out each permission in 2930 * the nvlist(s) 2931 */ 2932 2933 error = secpolicy_zfs(CRED()); 2934 if (error != 0) { 2935 if (zc->zc_perm_action == B_FALSE) { 2936 error = dsl_deleg_can_allow(zc->zc_name, 2937 fsaclnv, CRED()); 2938 } else { 2939 error = dsl_deleg_can_unallow(zc->zc_name, 2940 fsaclnv, CRED()); 2941 } 2942 } 2943 2944 if (error == 0) 2945 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 2946 2947 nvlist_free(fsaclnv); 2948 return (error); 2949 } 2950 2951 /* 2952 * inputs: 2953 * zc_name name of filesystem 2954 * 2955 * outputs: 2956 * zc_nvlist_src{_size} nvlist of delegated permissions 2957 */ 2958 static int 2959 zfs_ioc_get_fsacl(zfs_cmd_t *zc) 2960 { 2961 nvlist_t *nvp; 2962 int error; 2963 2964 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 2965 error = put_nvlist(zc, nvp); 2966 nvlist_free(nvp); 2967 } 2968 2969 return (error); 2970 } 2971 2972 /* 2973 * Search the vfs list for a specified resource. Returns a pointer to it 2974 * or NULL if no suitable entry is found. The caller of this routine 2975 * is responsible for releasing the returned vfs pointer. 2976 */ 2977 static vfs_t * 2978 zfs_get_vfs(const char *resource) 2979 { 2980 struct vfs *vfsp; 2981 struct vfs *vfs_found = NULL; 2982 2983 vfs_list_read_lock(); 2984 vfsp = rootvfs; 2985 do { 2986 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 2987 VFS_HOLD(vfsp); 2988 vfs_found = vfsp; 2989 break; 2990 } 2991 vfsp = vfsp->vfs_next; 2992 } while (vfsp != rootvfs); 2993 vfs_list_unlock(); 2994 return (vfs_found); 2995 } 2996 2997 /* ARGSUSED */ 2998 static void 2999 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 3000 { 3001 zfs_creat_t *zct = arg; 3002 3003 zfs_create_fs(os, cr, zct->zct_zplprops, tx); 3004 } 3005 3006 #define ZFS_PROP_UNDEFINED ((uint64_t)-1) 3007 3008 /* 3009 * inputs: 3010 * os parent objset pointer (NULL if root fs) 3011 * fuids_ok fuids allowed in this version of the spa? 3012 * sa_ok SAs allowed in this version of the spa? 3013 * createprops list of properties requested by creator 3014 * 3015 * outputs: 3016 * zplprops values for the zplprops we attach to the master node object 3017 * is_ci true if requested file system will be purely case-insensitive 3018 * 3019 * Determine the settings for utf8only, normalization and 3020 * casesensitivity. Specific values may have been requested by the 3021 * creator and/or we can inherit values from the parent dataset. If 3022 * the file system is of too early a vintage, a creator can not 3023 * request settings for these properties, even if the requested 3024 * setting is the default value. We don't actually want to create dsl 3025 * properties for these, so remove them from the source nvlist after 3026 * processing. 3027 */ 3028 static int 3029 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, 3030 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops, 3031 nvlist_t *zplprops, boolean_t *is_ci) 3032 { 3033 uint64_t sense = ZFS_PROP_UNDEFINED; 3034 uint64_t norm = ZFS_PROP_UNDEFINED; 3035 uint64_t u8 = ZFS_PROP_UNDEFINED; 3036 3037 ASSERT(zplprops != NULL); 3038 3039 if (os != NULL && os->os_phys->os_type != DMU_OST_ZFS) 3040 return (SET_ERROR(EINVAL)); 3041 3042 /* 3043 * Pull out creator prop choices, if any. 3044 */ 3045 if (createprops) { 3046 (void) nvlist_lookup_uint64(createprops, 3047 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); 3048 (void) nvlist_lookup_uint64(createprops, 3049 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); 3050 (void) nvlist_remove_all(createprops, 3051 zfs_prop_to_name(ZFS_PROP_NORMALIZE)); 3052 (void) nvlist_lookup_uint64(createprops, 3053 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); 3054 (void) nvlist_remove_all(createprops, 3055 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 3056 (void) nvlist_lookup_uint64(createprops, 3057 zfs_prop_to_name(ZFS_PROP_CASE), &sense); 3058 (void) nvlist_remove_all(createprops, 3059 zfs_prop_to_name(ZFS_PROP_CASE)); 3060 } 3061 3062 /* 3063 * If the zpl version requested is whacky or the file system 3064 * or pool is version is too "young" to support normalization 3065 * and the creator tried to set a value for one of the props, 3066 * error out. 3067 */ 3068 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || 3069 (zplver >= ZPL_VERSION_FUID && !fuids_ok) || 3070 (zplver >= ZPL_VERSION_SA && !sa_ok) || 3071 (zplver < ZPL_VERSION_NORMALIZATION && 3072 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || 3073 sense != ZFS_PROP_UNDEFINED))) 3074 return (SET_ERROR(ENOTSUP)); 3075 3076 /* 3077 * Put the version in the zplprops 3078 */ 3079 VERIFY(nvlist_add_uint64(zplprops, 3080 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); 3081 3082 if (norm == ZFS_PROP_UNDEFINED) 3083 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); 3084 VERIFY(nvlist_add_uint64(zplprops, 3085 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); 3086 3087 /* 3088 * If we're normalizing, names must always be valid UTF-8 strings. 3089 */ 3090 if (norm) 3091 u8 = 1; 3092 if (u8 == ZFS_PROP_UNDEFINED) 3093 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); 3094 VERIFY(nvlist_add_uint64(zplprops, 3095 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); 3096 3097 if (sense == ZFS_PROP_UNDEFINED) 3098 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); 3099 VERIFY(nvlist_add_uint64(zplprops, 3100 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); 3101 3102 if (is_ci) 3103 *is_ci = (sense == ZFS_CASE_INSENSITIVE); 3104 3105 return (0); 3106 } 3107 3108 static int 3109 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, 3110 nvlist_t *zplprops, boolean_t *is_ci) 3111 { 3112 boolean_t fuids_ok, sa_ok; 3113 uint64_t zplver = ZPL_VERSION; 3114 objset_t *os = NULL; 3115 char parentname[ZFS_MAX_DATASET_NAME_LEN]; 3116 char *cp; 3117 spa_t *spa; 3118 uint64_t spa_vers; 3119 int error; 3120 3121 (void) strlcpy(parentname, dataset, sizeof (parentname)); 3122 cp = strrchr(parentname, '/'); 3123 ASSERT(cp != NULL); 3124 cp[0] = '\0'; 3125 3126 if ((error = spa_open(dataset, &spa, FTAG)) != 0) 3127 return (error); 3128 3129 spa_vers = spa_version(spa); 3130 spa_close(spa, FTAG); 3131 3132 zplver = zfs_zpl_version_map(spa_vers); 3133 fuids_ok = (zplver >= ZPL_VERSION_FUID); 3134 sa_ok = (zplver >= ZPL_VERSION_SA); 3135 3136 /* 3137 * Open parent object set so we can inherit zplprop values. 3138 */ 3139 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) 3140 return (error); 3141 3142 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops, 3143 zplprops, is_ci); 3144 dmu_objset_rele(os, FTAG); 3145 return (error); 3146 } 3147 3148 static int 3149 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, 3150 nvlist_t *zplprops, boolean_t *is_ci) 3151 { 3152 boolean_t fuids_ok; 3153 boolean_t sa_ok; 3154 uint64_t zplver = ZPL_VERSION; 3155 int error; 3156 3157 zplver = zfs_zpl_version_map(spa_vers); 3158 fuids_ok = (zplver >= ZPL_VERSION_FUID); 3159 sa_ok = (zplver >= ZPL_VERSION_SA); 3160 3161 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok, 3162 createprops, zplprops, is_ci); 3163 return (error); 3164 } 3165 3166 /* 3167 * innvl: { 3168 * "type" -> dmu_objset_type_t (int32) 3169 * (optional) "props" -> { prop -> value } 3170 * } 3171 * 3172 * outnvl: propname -> error code (int32) 3173 */ 3174 static int 3175 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3176 { 3177 int error = 0; 3178 zfs_creat_t zct = { 0 }; 3179 nvlist_t *nvprops = NULL; 3180 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 3181 int32_t type32; 3182 dmu_objset_type_t type; 3183 boolean_t is_insensitive = B_FALSE; 3184 3185 if (nvlist_lookup_int32(innvl, "type", &type32) != 0) 3186 return (SET_ERROR(EINVAL)); 3187 type = type32; 3188 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); 3189 3190 switch (type) { 3191 case DMU_OST_ZFS: 3192 cbfunc = zfs_create_cb; 3193 break; 3194 3195 case DMU_OST_ZVOL: 3196 cbfunc = zvol_create_cb; 3197 break; 3198 3199 default: 3200 cbfunc = NULL; 3201 break; 3202 } 3203 if (strchr(fsname, '@') || 3204 strchr(fsname, '%')) 3205 return (SET_ERROR(EINVAL)); 3206 3207 zct.zct_props = nvprops; 3208 3209 if (cbfunc == NULL) 3210 return (SET_ERROR(EINVAL)); 3211 3212 if (type == DMU_OST_ZVOL) { 3213 uint64_t volsize, volblocksize; 3214 3215 if (nvprops == NULL) 3216 return (SET_ERROR(EINVAL)); 3217 if (nvlist_lookup_uint64(nvprops, 3218 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0) 3219 return (SET_ERROR(EINVAL)); 3220 3221 if ((error = nvlist_lookup_uint64(nvprops, 3222 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3223 &volblocksize)) != 0 && error != ENOENT) 3224 return (SET_ERROR(EINVAL)); 3225 3226 if (error != 0) 3227 volblocksize = zfs_prop_default_numeric( 3228 ZFS_PROP_VOLBLOCKSIZE); 3229 3230 if ((error = zvol_check_volblocksize( 3231 volblocksize)) != 0 || 3232 (error = zvol_check_volsize(volsize, 3233 volblocksize)) != 0) 3234 return (error); 3235 } else if (type == DMU_OST_ZFS) { 3236 int error; 3237 3238 /* 3239 * We have to have normalization and 3240 * case-folding flags correct when we do the 3241 * file system creation, so go figure them out 3242 * now. 3243 */ 3244 VERIFY(nvlist_alloc(&zct.zct_zplprops, 3245 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3246 error = zfs_fill_zplprops(fsname, nvprops, 3247 zct.zct_zplprops, &is_insensitive); 3248 if (error != 0) { 3249 nvlist_free(zct.zct_zplprops); 3250 return (error); 3251 } 3252 } 3253 3254 error = dmu_objset_create(fsname, type, 3255 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); 3256 nvlist_free(zct.zct_zplprops); 3257 3258 /* 3259 * It would be nice to do this atomically. 3260 */ 3261 if (error == 0) { 3262 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3263 nvprops, outnvl); 3264 if (error != 0) 3265 (void) dsl_destroy_head(fsname); 3266 } 3267 return (error); 3268 } 3269 3270 /* 3271 * innvl: { 3272 * "origin" -> name of origin snapshot 3273 * (optional) "props" -> { prop -> value } 3274 * } 3275 * 3276 * outnvl: propname -> error code (int32) 3277 */ 3278 static int 3279 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3280 { 3281 int error = 0; 3282 nvlist_t *nvprops = NULL; 3283 char *origin_name; 3284 3285 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0) 3286 return (SET_ERROR(EINVAL)); 3287 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); 3288 3289 if (strchr(fsname, '@') || 3290 strchr(fsname, '%')) 3291 return (SET_ERROR(EINVAL)); 3292 3293 if (dataset_namecheck(origin_name, NULL, NULL) != 0) 3294 return (SET_ERROR(EINVAL)); 3295 error = dmu_objset_clone(fsname, origin_name); 3296 if (error != 0) 3297 return (error); 3298 3299 /* 3300 * It would be nice to do this atomically. 3301 */ 3302 if (error == 0) { 3303 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3304 nvprops, outnvl); 3305 if (error != 0) 3306 (void) dsl_destroy_head(fsname); 3307 } 3308 return (error); 3309 } 3310 3311 /* 3312 * innvl: { 3313 * "snaps" -> { snapshot1, snapshot2 } 3314 * (optional) "props" -> { prop -> value (string) } 3315 * } 3316 * 3317 * outnvl: snapshot -> error code (int32) 3318 */ 3319 static int 3320 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3321 { 3322 nvlist_t *snaps; 3323 nvlist_t *props = NULL; 3324 int error, poollen; 3325 nvpair_t *pair; 3326 3327 (void) nvlist_lookup_nvlist(innvl, "props", &props); 3328 if ((error = zfs_check_userprops(poolname, props)) != 0) 3329 return (error); 3330 3331 if (!nvlist_empty(props) && 3332 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS)) 3333 return (SET_ERROR(ENOTSUP)); 3334 3335 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3336 return (SET_ERROR(EINVAL)); 3337 poollen = strlen(poolname); 3338 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3339 pair = nvlist_next_nvpair(snaps, pair)) { 3340 const char *name = nvpair_name(pair); 3341 const char *cp = strchr(name, '@'); 3342 3343 /* 3344 * The snap name must contain an @, and the part after it must 3345 * contain only valid characters. 3346 */ 3347 if (cp == NULL || 3348 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3349 return (SET_ERROR(EINVAL)); 3350 3351 /* 3352 * The snap must be in the specified pool. 3353 */ 3354 if (strncmp(name, poolname, poollen) != 0 || 3355 (name[poollen] != '/' && name[poollen] != '@')) 3356 return (SET_ERROR(EXDEV)); 3357 3358 /* This must be the only snap of this fs. */ 3359 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair); 3360 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) { 3361 if (strncmp(name, nvpair_name(pair2), cp - name + 1) 3362 == 0) { 3363 return (SET_ERROR(EXDEV)); 3364 } 3365 } 3366 } 3367 3368 error = dsl_dataset_snapshot(snaps, props, outnvl); 3369 return (error); 3370 } 3371 3372 /* 3373 * innvl: "message" -> string 3374 */ 3375 /* ARGSUSED */ 3376 static int 3377 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl) 3378 { 3379 char *message; 3380 spa_t *spa; 3381 int error; 3382 char *poolname; 3383 3384 /* 3385 * The poolname in the ioctl is not set, we get it from the TSD, 3386 * which was set at the end of the last successful ioctl that allows 3387 * logging. The secpolicy func already checked that it is set. 3388 * Only one log ioctl is allowed after each successful ioctl, so 3389 * we clear the TSD here. 3390 */ 3391 poolname = tsd_get(zfs_allow_log_key); 3392 (void) tsd_set(zfs_allow_log_key, NULL); 3393 error = spa_open(poolname, &spa, FTAG); 3394 strfree(poolname); 3395 if (error != 0) 3396 return (error); 3397 3398 if (nvlist_lookup_string(innvl, "message", &message) != 0) { 3399 spa_close(spa, FTAG); 3400 return (SET_ERROR(EINVAL)); 3401 } 3402 3403 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 3404 spa_close(spa, FTAG); 3405 return (SET_ERROR(ENOTSUP)); 3406 } 3407 3408 error = spa_history_log(spa, message); 3409 spa_close(spa, FTAG); 3410 return (error); 3411 } 3412 3413 /* 3414 * The dp_config_rwlock must not be held when calling this, because the 3415 * unmount may need to write out data. 3416 * 3417 * This function is best-effort. Callers must deal gracefully if it 3418 * remains mounted (or is remounted after this call). 3419 * 3420 * Returns 0 if the argument is not a snapshot, or it is not currently a 3421 * filesystem, or we were able to unmount it. Returns error code otherwise. 3422 */ 3423 int 3424 zfs_unmount_snap(const char *snapname) 3425 { 3426 vfs_t *vfsp; 3427 zfsvfs_t *zfsvfs; 3428 int err; 3429 3430 if (strchr(snapname, '@') == NULL) 3431 return (0); 3432 3433 vfsp = zfs_get_vfs(snapname); 3434 if (vfsp == NULL) 3435 return (0); 3436 3437 zfsvfs = vfsp->vfs_data; 3438 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os))); 3439 3440 err = vn_vfswlock(vfsp->vfs_vnodecovered); 3441 VFS_RELE(vfsp); 3442 if (err != 0) 3443 return (SET_ERROR(err)); 3444 3445 /* 3446 * Always force the unmount for snapshots. 3447 */ 3448 (void) dounmount(vfsp, MS_FORCE, kcred); 3449 return (0); 3450 } 3451 3452 /* ARGSUSED */ 3453 static int 3454 zfs_unmount_snap_cb(const char *snapname, void *arg) 3455 { 3456 return (zfs_unmount_snap(snapname)); 3457 } 3458 3459 /* 3460 * When a clone is destroyed, its origin may also need to be destroyed, 3461 * in which case it must be unmounted. This routine will do that unmount 3462 * if necessary. 3463 */ 3464 void 3465 zfs_destroy_unmount_origin(const char *fsname) 3466 { 3467 int error; 3468 objset_t *os; 3469 dsl_dataset_t *ds; 3470 3471 error = dmu_objset_hold(fsname, FTAG, &os); 3472 if (error != 0) 3473 return; 3474 ds = dmu_objset_ds(os); 3475 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) { 3476 char originname[ZFS_MAX_DATASET_NAME_LEN]; 3477 dsl_dataset_name(ds->ds_prev, originname); 3478 dmu_objset_rele(os, FTAG); 3479 (void) zfs_unmount_snap(originname); 3480 } else { 3481 dmu_objset_rele(os, FTAG); 3482 } 3483 } 3484 3485 /* 3486 * innvl: { 3487 * "snaps" -> { snapshot1, snapshot2 } 3488 * (optional boolean) "defer" 3489 * } 3490 * 3491 * outnvl: snapshot -> error code (int32) 3492 * 3493 */ 3494 /* ARGSUSED */ 3495 static int 3496 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3497 { 3498 nvlist_t *snaps; 3499 nvpair_t *pair; 3500 boolean_t defer; 3501 3502 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3503 return (SET_ERROR(EINVAL)); 3504 defer = nvlist_exists(innvl, "defer"); 3505 3506 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3507 pair = nvlist_next_nvpair(snaps, pair)) { 3508 (void) zfs_unmount_snap(nvpair_name(pair)); 3509 } 3510 3511 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl)); 3512 } 3513 3514 /* 3515 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>. 3516 * All bookmarks must be in the same pool. 3517 * 3518 * innvl: { 3519 * bookmark1 -> snapshot1, bookmark2 -> snapshot2 3520 * } 3521 * 3522 * outnvl: bookmark -> error code (int32) 3523 * 3524 */ 3525 /* ARGSUSED */ 3526 static int 3527 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3528 { 3529 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3530 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3531 char *snap_name; 3532 3533 /* 3534 * Verify the snapshot argument. 3535 */ 3536 if (nvpair_value_string(pair, &snap_name) != 0) 3537 return (SET_ERROR(EINVAL)); 3538 3539 3540 /* Verify that the keys (bookmarks) are unique */ 3541 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair); 3542 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) { 3543 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0) 3544 return (SET_ERROR(EINVAL)); 3545 } 3546 } 3547 3548 return (dsl_bookmark_create(innvl, outnvl)); 3549 } 3550 3551 /* 3552 * innvl: { 3553 * property 1, property 2, ... 3554 * } 3555 * 3556 * outnvl: { 3557 * bookmark name 1 -> { property 1, property 2, ... }, 3558 * bookmark name 2 -> { property 1, property 2, ... } 3559 * } 3560 * 3561 */ 3562 static int 3563 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3564 { 3565 return (dsl_get_bookmarks(fsname, innvl, outnvl)); 3566 } 3567 3568 /* 3569 * innvl: { 3570 * bookmark name 1, bookmark name 2 3571 * } 3572 * 3573 * outnvl: bookmark -> error code (int32) 3574 * 3575 */ 3576 static int 3577 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl, 3578 nvlist_t *outnvl) 3579 { 3580 int error, poollen; 3581 3582 poollen = strlen(poolname); 3583 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3584 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3585 const char *name = nvpair_name(pair); 3586 const char *cp = strchr(name, '#'); 3587 3588 /* 3589 * The bookmark name must contain an #, and the part after it 3590 * must contain only valid characters. 3591 */ 3592 if (cp == NULL || 3593 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3594 return (SET_ERROR(EINVAL)); 3595 3596 /* 3597 * The bookmark must be in the specified pool. 3598 */ 3599 if (strncmp(name, poolname, poollen) != 0 || 3600 (name[poollen] != '/' && name[poollen] != '#')) 3601 return (SET_ERROR(EXDEV)); 3602 } 3603 3604 error = dsl_bookmark_destroy(innvl, outnvl); 3605 return (error); 3606 } 3607 3608 /* 3609 * inputs: 3610 * zc_name name of dataset to destroy 3611 * zc_objset_type type of objset 3612 * zc_defer_destroy mark for deferred destroy 3613 * 3614 * outputs: none 3615 */ 3616 static int 3617 zfs_ioc_destroy(zfs_cmd_t *zc) 3618 { 3619 int err; 3620 3621 if (zc->zc_objset_type == DMU_OST_ZFS) { 3622 err = zfs_unmount_snap(zc->zc_name); 3623 if (err != 0) 3624 return (err); 3625 } 3626 3627 if (strchr(zc->zc_name, '@')) 3628 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy); 3629 else 3630 err = dsl_destroy_head(zc->zc_name); 3631 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 3632 (void) zvol_remove_minor(zc->zc_name); 3633 return (err); 3634 } 3635 3636 /* 3637 * fsname is name of dataset to rollback (to most recent snapshot) 3638 * 3639 * innvl is not used. 3640 * 3641 * outnvl: "target" -> name of most recent snapshot 3642 * } 3643 */ 3644 /* ARGSUSED */ 3645 static int 3646 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl) 3647 { 3648 zfsvfs_t *zfsvfs; 3649 int error; 3650 3651 if (getzfsvfs(fsname, &zfsvfs) == 0) { 3652 dsl_dataset_t *ds; 3653 3654 ds = dmu_objset_ds(zfsvfs->z_os); 3655 error = zfs_suspend_fs(zfsvfs); 3656 if (error == 0) { 3657 int resume_err; 3658 3659 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl); 3660 resume_err = zfs_resume_fs(zfsvfs, ds); 3661 error = error ? error : resume_err; 3662 } 3663 VFS_RELE(zfsvfs->z_vfs); 3664 } else { 3665 error = dsl_dataset_rollback(fsname, NULL, outnvl); 3666 } 3667 return (error); 3668 } 3669 3670 static int 3671 recursive_unmount(const char *fsname, void *arg) 3672 { 3673 const char *snapname = arg; 3674 char fullname[ZFS_MAX_DATASET_NAME_LEN]; 3675 3676 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname); 3677 return (zfs_unmount_snap(fullname)); 3678 } 3679 3680 /* 3681 * inputs: 3682 * zc_name old name of dataset 3683 * zc_value new name of dataset 3684 * zc_cookie recursive flag (only valid for snapshots) 3685 * 3686 * outputs: none 3687 */ 3688 static int 3689 zfs_ioc_rename(zfs_cmd_t *zc) 3690 { 3691 boolean_t recursive = zc->zc_cookie & 1; 3692 char *at; 3693 3694 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3695 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3696 strchr(zc->zc_value, '%')) 3697 return (SET_ERROR(EINVAL)); 3698 3699 at = strchr(zc->zc_name, '@'); 3700 if (at != NULL) { 3701 /* snaps must be in same fs */ 3702 int error; 3703 3704 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1)) 3705 return (SET_ERROR(EXDEV)); 3706 *at = '\0'; 3707 if (zc->zc_objset_type == DMU_OST_ZFS) { 3708 error = dmu_objset_find(zc->zc_name, 3709 recursive_unmount, at + 1, 3710 recursive ? DS_FIND_CHILDREN : 0); 3711 if (error != 0) { 3712 *at = '@'; 3713 return (error); 3714 } 3715 } 3716 error = dsl_dataset_rename_snapshot(zc->zc_name, 3717 at + 1, strchr(zc->zc_value, '@') + 1, recursive); 3718 *at = '@'; 3719 3720 return (error); 3721 } else { 3722 if (zc->zc_objset_type == DMU_OST_ZVOL) 3723 (void) zvol_remove_minor(zc->zc_name); 3724 return (dsl_dir_rename(zc->zc_name, zc->zc_value)); 3725 } 3726 } 3727 3728 static int 3729 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3730 { 3731 const char *propname = nvpair_name(pair); 3732 boolean_t issnap = (strchr(dsname, '@') != NULL); 3733 zfs_prop_t prop = zfs_name_to_prop(propname); 3734 uint64_t intval; 3735 int err; 3736 3737 if (prop == ZPROP_INVAL) { 3738 if (zfs_prop_user(propname)) { 3739 if (err = zfs_secpolicy_write_perms(dsname, 3740 ZFS_DELEG_PERM_USERPROP, cr)) 3741 return (err); 3742 return (0); 3743 } 3744 3745 if (!issnap && zfs_prop_userquota(propname)) { 3746 const char *perm = NULL; 3747 const char *uq_prefix = 3748 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3749 const char *gq_prefix = 3750 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3751 3752 if (strncmp(propname, uq_prefix, 3753 strlen(uq_prefix)) == 0) { 3754 perm = ZFS_DELEG_PERM_USERQUOTA; 3755 } else if (strncmp(propname, gq_prefix, 3756 strlen(gq_prefix)) == 0) { 3757 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3758 } else { 3759 /* USERUSED and GROUPUSED are read-only */ 3760 return (SET_ERROR(EINVAL)); 3761 } 3762 3763 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3764 return (err); 3765 return (0); 3766 } 3767 3768 return (SET_ERROR(EINVAL)); 3769 } 3770 3771 if (issnap) 3772 return (SET_ERROR(EINVAL)); 3773 3774 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3775 /* 3776 * dsl_prop_get_all_impl() returns properties in this 3777 * format. 3778 */ 3779 nvlist_t *attrs; 3780 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3781 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3782 &pair) == 0); 3783 } 3784 3785 /* 3786 * Check that this value is valid for this pool version 3787 */ 3788 switch (prop) { 3789 case ZFS_PROP_COMPRESSION: 3790 /* 3791 * If the user specified gzip compression, make sure 3792 * the SPA supports it. We ignore any errors here since 3793 * we'll catch them later. 3794 */ 3795 if (nvpair_value_uint64(pair, &intval) == 0) { 3796 if (intval >= ZIO_COMPRESS_GZIP_1 && 3797 intval <= ZIO_COMPRESS_GZIP_9 && 3798 zfs_earlier_version(dsname, 3799 SPA_VERSION_GZIP_COMPRESSION)) { 3800 return (SET_ERROR(ENOTSUP)); 3801 } 3802 3803 if (intval == ZIO_COMPRESS_ZLE && 3804 zfs_earlier_version(dsname, 3805 SPA_VERSION_ZLE_COMPRESSION)) 3806 return (SET_ERROR(ENOTSUP)); 3807 3808 if (intval == ZIO_COMPRESS_LZ4) { 3809 spa_t *spa; 3810 3811 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3812 return (err); 3813 3814 if (!spa_feature_is_enabled(spa, 3815 SPA_FEATURE_LZ4_COMPRESS)) { 3816 spa_close(spa, FTAG); 3817 return (SET_ERROR(ENOTSUP)); 3818 } 3819 spa_close(spa, FTAG); 3820 } 3821 3822 /* 3823 * If this is a bootable dataset then 3824 * verify that the compression algorithm 3825 * is supported for booting. We must return 3826 * something other than ENOTSUP since it 3827 * implies a downrev pool version. 3828 */ 3829 if (zfs_is_bootfs(dsname) && 3830 !BOOTFS_COMPRESS_VALID(intval)) { 3831 return (SET_ERROR(ERANGE)); 3832 } 3833 } 3834 break; 3835 3836 case ZFS_PROP_COPIES: 3837 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3838 return (SET_ERROR(ENOTSUP)); 3839 break; 3840 3841 case ZFS_PROP_RECORDSIZE: 3842 /* Record sizes above 128k need the feature to be enabled */ 3843 if (nvpair_value_uint64(pair, &intval) == 0 && 3844 intval > SPA_OLD_MAXBLOCKSIZE) { 3845 spa_t *spa; 3846 3847 /* 3848 * We don't allow setting the property above 1MB, 3849 * unless the tunable has been changed. 3850 */ 3851 if (intval > zfs_max_recordsize || 3852 intval > SPA_MAXBLOCKSIZE) 3853 return (SET_ERROR(ERANGE)); 3854 3855 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3856 return (err); 3857 3858 if (!spa_feature_is_enabled(spa, 3859 SPA_FEATURE_LARGE_BLOCKS)) { 3860 spa_close(spa, FTAG); 3861 return (SET_ERROR(ENOTSUP)); 3862 } 3863 spa_close(spa, FTAG); 3864 } 3865 break; 3866 3867 case ZFS_PROP_SHARESMB: 3868 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3869 return (SET_ERROR(ENOTSUP)); 3870 break; 3871 3872 case ZFS_PROP_ACLINHERIT: 3873 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3874 nvpair_value_uint64(pair, &intval) == 0) { 3875 if (intval == ZFS_ACL_PASSTHROUGH_X && 3876 zfs_earlier_version(dsname, 3877 SPA_VERSION_PASSTHROUGH_X)) 3878 return (SET_ERROR(ENOTSUP)); 3879 } 3880 break; 3881 3882 case ZFS_PROP_CHECKSUM: 3883 case ZFS_PROP_DEDUP: 3884 { 3885 spa_feature_t feature; 3886 spa_t *spa; 3887 3888 /* dedup feature version checks */ 3889 if (prop == ZFS_PROP_DEDUP && 3890 zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3891 return (SET_ERROR(ENOTSUP)); 3892 3893 if (nvpair_value_uint64(pair, &intval) != 0) 3894 return (SET_ERROR(EINVAL)); 3895 3896 /* check prop value is enabled in features */ 3897 feature = zio_checksum_to_feature(intval & ZIO_CHECKSUM_MASK); 3898 if (feature == SPA_FEATURE_NONE) 3899 break; 3900 3901 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3902 return (err); 3903 /* 3904 * Salted checksums are not supported on root pools. 3905 */ 3906 if (spa_bootfs(spa) != 0 && 3907 intval < ZIO_CHECKSUM_FUNCTIONS && 3908 (zio_checksum_table[intval].ci_flags & 3909 ZCHECKSUM_FLAG_SALTED)) { 3910 spa_close(spa, FTAG); 3911 return (SET_ERROR(ERANGE)); 3912 } 3913 if (!spa_feature_is_enabled(spa, feature)) { 3914 spa_close(spa, FTAG); 3915 return (SET_ERROR(ENOTSUP)); 3916 } 3917 spa_close(spa, FTAG); 3918 break; 3919 } 3920 } 3921 3922 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3923 } 3924 3925 /* 3926 * Checks for a race condition to make sure we don't increment a feature flag 3927 * multiple times. 3928 */ 3929 static int 3930 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx) 3931 { 3932 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3933 spa_feature_t *featurep = arg; 3934 3935 if (!spa_feature_is_active(spa, *featurep)) 3936 return (0); 3937 else 3938 return (SET_ERROR(EBUSY)); 3939 } 3940 3941 /* 3942 * The callback invoked on feature activation in the sync task caused by 3943 * zfs_prop_activate_feature. 3944 */ 3945 static void 3946 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx) 3947 { 3948 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3949 spa_feature_t *featurep = arg; 3950 3951 spa_feature_incr(spa, *featurep, tx); 3952 } 3953 3954 /* 3955 * Activates a feature on a pool in response to a property setting. This 3956 * creates a new sync task which modifies the pool to reflect the feature 3957 * as being active. 3958 */ 3959 static int 3960 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature) 3961 { 3962 int err; 3963 3964 /* EBUSY here indicates that the feature is already active */ 3965 err = dsl_sync_task(spa_name(spa), 3966 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync, 3967 &feature, 2, ZFS_SPACE_CHECK_RESERVED); 3968 3969 if (err != 0 && err != EBUSY) 3970 return (err); 3971 else 3972 return (0); 3973 } 3974 3975 /* 3976 * Removes properties from the given props list that fail permission checks 3977 * needed to clear them and to restore them in case of a receive error. For each 3978 * property, make sure we have both set and inherit permissions. 3979 * 3980 * Returns the first error encountered if any permission checks fail. If the 3981 * caller provides a non-NULL errlist, it also gives the complete list of names 3982 * of all the properties that failed a permission check along with the 3983 * corresponding error numbers. The caller is responsible for freeing the 3984 * returned errlist. 3985 * 3986 * If every property checks out successfully, zero is returned and the list 3987 * pointed at by errlist is NULL. 3988 */ 3989 static int 3990 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 3991 { 3992 zfs_cmd_t *zc; 3993 nvpair_t *pair, *next_pair; 3994 nvlist_t *errors; 3995 int err, rv = 0; 3996 3997 if (props == NULL) 3998 return (0); 3999 4000 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4001 4002 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 4003 (void) strcpy(zc->zc_name, dataset); 4004 pair = nvlist_next_nvpair(props, NULL); 4005 while (pair != NULL) { 4006 next_pair = nvlist_next_nvpair(props, pair); 4007 4008 (void) strcpy(zc->zc_value, nvpair_name(pair)); 4009 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 4010 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) { 4011 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 4012 VERIFY(nvlist_add_int32(errors, 4013 zc->zc_value, err) == 0); 4014 } 4015 pair = next_pair; 4016 } 4017 kmem_free(zc, sizeof (zfs_cmd_t)); 4018 4019 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 4020 nvlist_free(errors); 4021 errors = NULL; 4022 } else { 4023 VERIFY(nvpair_value_int32(pair, &rv) == 0); 4024 } 4025 4026 if (errlist == NULL) 4027 nvlist_free(errors); 4028 else 4029 *errlist = errors; 4030 4031 return (rv); 4032 } 4033 4034 static boolean_t 4035 propval_equals(nvpair_t *p1, nvpair_t *p2) 4036 { 4037 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 4038 /* dsl_prop_get_all_impl() format */ 4039 nvlist_t *attrs; 4040 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 4041 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4042 &p1) == 0); 4043 } 4044 4045 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 4046 nvlist_t *attrs; 4047 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 4048 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4049 &p2) == 0); 4050 } 4051 4052 if (nvpair_type(p1) != nvpair_type(p2)) 4053 return (B_FALSE); 4054 4055 if (nvpair_type(p1) == DATA_TYPE_STRING) { 4056 char *valstr1, *valstr2; 4057 4058 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 4059 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 4060 return (strcmp(valstr1, valstr2) == 0); 4061 } else { 4062 uint64_t intval1, intval2; 4063 4064 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 4065 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 4066 return (intval1 == intval2); 4067 } 4068 } 4069 4070 /* 4071 * Remove properties from props if they are not going to change (as determined 4072 * by comparison with origprops). Remove them from origprops as well, since we 4073 * do not need to clear or restore properties that won't change. 4074 */ 4075 static void 4076 props_reduce(nvlist_t *props, nvlist_t *origprops) 4077 { 4078 nvpair_t *pair, *next_pair; 4079 4080 if (origprops == NULL) 4081 return; /* all props need to be received */ 4082 4083 pair = nvlist_next_nvpair(props, NULL); 4084 while (pair != NULL) { 4085 const char *propname = nvpair_name(pair); 4086 nvpair_t *match; 4087 4088 next_pair = nvlist_next_nvpair(props, pair); 4089 4090 if ((nvlist_lookup_nvpair(origprops, propname, 4091 &match) != 0) || !propval_equals(pair, match)) 4092 goto next; /* need to set received value */ 4093 4094 /* don't clear the existing received value */ 4095 (void) nvlist_remove_nvpair(origprops, match); 4096 /* don't bother receiving the property */ 4097 (void) nvlist_remove_nvpair(props, pair); 4098 next: 4099 pair = next_pair; 4100 } 4101 } 4102 4103 /* 4104 * Extract properties that cannot be set PRIOR to the receipt of a dataset. 4105 * For example, refquota cannot be set until after the receipt of a dataset, 4106 * because in replication streams, an older/earlier snapshot may exceed the 4107 * refquota. We want to receive the older/earlier snapshot, but setting 4108 * refquota pre-receipt will set the dsl's ACTUAL quota, which will prevent 4109 * the older/earlier snapshot from being received (with EDQUOT). 4110 * 4111 * The ZFS test "zfs_receive_011_pos" demonstrates such a scenario. 4112 * 4113 * libzfs will need to be judicious handling errors encountered by props 4114 * extracted by this function. 4115 */ 4116 static nvlist_t * 4117 extract_delay_props(nvlist_t *props) 4118 { 4119 nvlist_t *delayprops; 4120 nvpair_t *nvp, *tmp; 4121 static const zfs_prop_t delayable[] = { ZFS_PROP_REFQUOTA, 0 }; 4122 int i; 4123 4124 VERIFY(nvlist_alloc(&delayprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4125 4126 for (nvp = nvlist_next_nvpair(props, NULL); nvp != NULL; 4127 nvp = nvlist_next_nvpair(props, nvp)) { 4128 /* 4129 * strcmp() is safe because zfs_prop_to_name() always returns 4130 * a bounded string. 4131 */ 4132 for (i = 0; delayable[i] != 0; i++) { 4133 if (strcmp(zfs_prop_to_name(delayable[i]), 4134 nvpair_name(nvp)) == 0) { 4135 break; 4136 } 4137 } 4138 if (delayable[i] != 0) { 4139 tmp = nvlist_prev_nvpair(props, nvp); 4140 VERIFY(nvlist_add_nvpair(delayprops, nvp) == 0); 4141 VERIFY(nvlist_remove_nvpair(props, nvp) == 0); 4142 nvp = tmp; 4143 } 4144 } 4145 4146 if (nvlist_empty(delayprops)) { 4147 nvlist_free(delayprops); 4148 delayprops = NULL; 4149 } 4150 return (delayprops); 4151 } 4152 4153 #ifdef DEBUG 4154 static boolean_t zfs_ioc_recv_inject_err; 4155 #endif 4156 4157 /* 4158 * inputs: 4159 * zc_name name of containing filesystem 4160 * zc_nvlist_src{_size} nvlist of properties to apply 4161 * zc_value name of snapshot to create 4162 * zc_string name of clone origin (if DRR_FLAG_CLONE) 4163 * zc_cookie file descriptor to recv from 4164 * zc_begin_record the BEGIN record of the stream (not byteswapped) 4165 * zc_guid force flag 4166 * zc_cleanup_fd cleanup-on-exit file descriptor 4167 * zc_action_handle handle for this guid/ds mapping (or zero on first call) 4168 * zc_resumable if data is incomplete assume sender will resume 4169 * 4170 * outputs: 4171 * zc_cookie number of bytes read 4172 * zc_nvlist_dst{_size} error for each unapplied received property 4173 * zc_obj zprop_errflags_t 4174 * zc_action_handle handle for this guid/ds mapping 4175 */ 4176 static int 4177 zfs_ioc_recv(zfs_cmd_t *zc) 4178 { 4179 file_t *fp; 4180 dmu_recv_cookie_t drc; 4181 boolean_t force = (boolean_t)zc->zc_guid; 4182 int fd; 4183 int error = 0; 4184 int props_error = 0; 4185 nvlist_t *errors; 4186 offset_t off; 4187 nvlist_t *props = NULL; /* sent properties */ 4188 nvlist_t *origprops = NULL; /* existing properties */ 4189 nvlist_t *delayprops = NULL; /* sent properties applied post-receive */ 4190 char *origin = NULL; 4191 char *tosnap; 4192 char tofs[ZFS_MAX_DATASET_NAME_LEN]; 4193 boolean_t first_recvd_props = B_FALSE; 4194 4195 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 4196 strchr(zc->zc_value, '@') == NULL || 4197 strchr(zc->zc_value, '%')) 4198 return (SET_ERROR(EINVAL)); 4199 4200 (void) strcpy(tofs, zc->zc_value); 4201 tosnap = strchr(tofs, '@'); 4202 *tosnap++ = '\0'; 4203 4204 if (zc->zc_nvlist_src != NULL && 4205 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 4206 zc->zc_iflags, &props)) != 0) 4207 return (error); 4208 4209 fd = zc->zc_cookie; 4210 fp = getf(fd); 4211 if (fp == NULL) { 4212 nvlist_free(props); 4213 return (SET_ERROR(EBADF)); 4214 } 4215 4216 errors = fnvlist_alloc(); 4217 4218 if (zc->zc_string[0]) 4219 origin = zc->zc_string; 4220 4221 error = dmu_recv_begin(tofs, tosnap, 4222 &zc->zc_begin_record, force, zc->zc_resumable, origin, &drc); 4223 if (error != 0) 4224 goto out; 4225 4226 /* 4227 * Set properties before we receive the stream so that they are applied 4228 * to the new data. Note that we must call dmu_recv_stream() if 4229 * dmu_recv_begin() succeeds. 4230 */ 4231 if (props != NULL && !drc.drc_newfs) { 4232 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >= 4233 SPA_VERSION_RECVD_PROPS && 4234 !dsl_prop_get_hasrecvd(tofs)) 4235 first_recvd_props = B_TRUE; 4236 4237 /* 4238 * If new received properties are supplied, they are to 4239 * completely replace the existing received properties, so stash 4240 * away the existing ones. 4241 */ 4242 if (dsl_prop_get_received(tofs, &origprops) == 0) { 4243 nvlist_t *errlist = NULL; 4244 /* 4245 * Don't bother writing a property if its value won't 4246 * change (and avoid the unnecessary security checks). 4247 * 4248 * The first receive after SPA_VERSION_RECVD_PROPS is a 4249 * special case where we blow away all local properties 4250 * regardless. 4251 */ 4252 if (!first_recvd_props) 4253 props_reduce(props, origprops); 4254 if (zfs_check_clearable(tofs, origprops, &errlist) != 0) 4255 (void) nvlist_merge(errors, errlist, 0); 4256 nvlist_free(errlist); 4257 4258 if (clear_received_props(tofs, origprops, 4259 first_recvd_props ? NULL : props) != 0) 4260 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4261 } else { 4262 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4263 } 4264 } 4265 4266 if (props != NULL) { 4267 props_error = dsl_prop_set_hasrecvd(tofs); 4268 4269 if (props_error == 0) { 4270 delayprops = extract_delay_props(props); 4271 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4272 props, errors); 4273 } 4274 } 4275 4276 off = fp->f_offset; 4277 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd, 4278 &zc->zc_action_handle); 4279 4280 if (error == 0) { 4281 zfsvfs_t *zfsvfs = NULL; 4282 4283 if (getzfsvfs(tofs, &zfsvfs) == 0) { 4284 /* online recv */ 4285 dsl_dataset_t *ds; 4286 int end_err; 4287 4288 ds = dmu_objset_ds(zfsvfs->z_os); 4289 error = zfs_suspend_fs(zfsvfs); 4290 /* 4291 * If the suspend fails, then the recv_end will 4292 * likely also fail, and clean up after itself. 4293 */ 4294 end_err = dmu_recv_end(&drc, zfsvfs); 4295 if (error == 0) 4296 error = zfs_resume_fs(zfsvfs, ds); 4297 error = error ? error : end_err; 4298 VFS_RELE(zfsvfs->z_vfs); 4299 } else { 4300 error = dmu_recv_end(&drc, NULL); 4301 } 4302 4303 /* Set delayed properties now, after we're done receiving. */ 4304 if (delayprops != NULL && error == 0) { 4305 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4306 delayprops, errors); 4307 } 4308 } 4309 4310 if (delayprops != NULL) { 4311 /* 4312 * Merge delayed props back in with initial props, in case 4313 * we're DEBUG and zfs_ioc_recv_inject_err is set (which means 4314 * we have to make sure clear_received_props() includes 4315 * the delayed properties). 4316 * 4317 * Since zfs_ioc_recv_inject_err is only in DEBUG kernels, 4318 * using ASSERT() will be just like a VERIFY. 4319 */ 4320 ASSERT(nvlist_merge(props, delayprops, 0) == 0); 4321 nvlist_free(delayprops); 4322 } 4323 4324 /* 4325 * Now that all props, initial and delayed, are set, report the prop 4326 * errors to the caller. 4327 */ 4328 if (zc->zc_nvlist_dst_size != 0 && 4329 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 || 4330 put_nvlist(zc, errors) != 0)) { 4331 /* 4332 * Caller made zc->zc_nvlist_dst less than the minimum expected 4333 * size or supplied an invalid address. 4334 */ 4335 props_error = SET_ERROR(EINVAL); 4336 } 4337 4338 zc->zc_cookie = off - fp->f_offset; 4339 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4340 fp->f_offset = off; 4341 4342 #ifdef DEBUG 4343 if (zfs_ioc_recv_inject_err) { 4344 zfs_ioc_recv_inject_err = B_FALSE; 4345 error = 1; 4346 } 4347 #endif 4348 /* 4349 * On error, restore the original props. 4350 */ 4351 if (error != 0 && props != NULL && !drc.drc_newfs) { 4352 if (clear_received_props(tofs, props, NULL) != 0) { 4353 /* 4354 * We failed to clear the received properties. 4355 * Since we may have left a $recvd value on the 4356 * system, we can't clear the $hasrecvd flag. 4357 */ 4358 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4359 } else if (first_recvd_props) { 4360 dsl_prop_unset_hasrecvd(tofs); 4361 } 4362 4363 if (origprops == NULL && !drc.drc_newfs) { 4364 /* We failed to stash the original properties. */ 4365 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4366 } 4367 4368 /* 4369 * dsl_props_set() will not convert RECEIVED to LOCAL on or 4370 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 4371 * explictly if we're restoring local properties cleared in the 4372 * first new-style receive. 4373 */ 4374 if (origprops != NULL && 4375 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 4376 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 4377 origprops, NULL) != 0) { 4378 /* 4379 * We stashed the original properties but failed to 4380 * restore them. 4381 */ 4382 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4383 } 4384 } 4385 out: 4386 nvlist_free(props); 4387 nvlist_free(origprops); 4388 nvlist_free(errors); 4389 releasef(fd); 4390 4391 if (error == 0) 4392 error = props_error; 4393 4394 return (error); 4395 } 4396 4397 /* 4398 * inputs: 4399 * zc_name name of snapshot to send 4400 * zc_cookie file descriptor to send stream to 4401 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj) 4402 * zc_sendobj objsetid of snapshot to send 4403 * zc_fromobj objsetid of incremental fromsnap (may be zero) 4404 * zc_guid if set, estimate size of stream only. zc_cookie is ignored. 4405 * output size in zc_objset_type. 4406 * zc_flags lzc_send_flags 4407 * 4408 * outputs: 4409 * zc_objset_type estimated size, if zc_guid is set 4410 */ 4411 static int 4412 zfs_ioc_send(zfs_cmd_t *zc) 4413 { 4414 int error; 4415 offset_t off; 4416 boolean_t estimate = (zc->zc_guid != 0); 4417 boolean_t embedok = (zc->zc_flags & 0x1); 4418 boolean_t large_block_ok = (zc->zc_flags & 0x2); 4419 boolean_t compressok = (zc->zc_flags & 0x4); 4420 4421 if (zc->zc_obj != 0) { 4422 dsl_pool_t *dp; 4423 dsl_dataset_t *tosnap; 4424 4425 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4426 if (error != 0) 4427 return (error); 4428 4429 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4430 if (error != 0) { 4431 dsl_pool_rele(dp, FTAG); 4432 return (error); 4433 } 4434 4435 if (dsl_dir_is_clone(tosnap->ds_dir)) 4436 zc->zc_fromobj = 4437 dsl_dir_phys(tosnap->ds_dir)->dd_origin_obj; 4438 dsl_dataset_rele(tosnap, FTAG); 4439 dsl_pool_rele(dp, FTAG); 4440 } 4441 4442 if (estimate) { 4443 dsl_pool_t *dp; 4444 dsl_dataset_t *tosnap; 4445 dsl_dataset_t *fromsnap = NULL; 4446 4447 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4448 if (error != 0) 4449 return (error); 4450 4451 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4452 if (error != 0) { 4453 dsl_pool_rele(dp, FTAG); 4454 return (error); 4455 } 4456 4457 if (zc->zc_fromobj != 0) { 4458 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, 4459 FTAG, &fromsnap); 4460 if (error != 0) { 4461 dsl_dataset_rele(tosnap, FTAG); 4462 dsl_pool_rele(dp, FTAG); 4463 return (error); 4464 } 4465 } 4466 4467 error = dmu_send_estimate(tosnap, fromsnap, compressok, 4468 &zc->zc_objset_type); 4469 4470 if (fromsnap != NULL) 4471 dsl_dataset_rele(fromsnap, FTAG); 4472 dsl_dataset_rele(tosnap, FTAG); 4473 dsl_pool_rele(dp, FTAG); 4474 } else { 4475 file_t *fp = getf(zc->zc_cookie); 4476 if (fp == NULL) 4477 return (SET_ERROR(EBADF)); 4478 4479 off = fp->f_offset; 4480 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj, 4481 zc->zc_fromobj, embedok, large_block_ok, compressok, 4482 zc->zc_cookie, fp->f_vnode, &off); 4483 4484 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 4485 fp->f_offset = off; 4486 releasef(zc->zc_cookie); 4487 } 4488 return (error); 4489 } 4490 4491 /* 4492 * inputs: 4493 * zc_name name of snapshot on which to report progress 4494 * zc_cookie file descriptor of send stream 4495 * 4496 * outputs: 4497 * zc_cookie number of bytes written in send stream thus far 4498 */ 4499 static int 4500 zfs_ioc_send_progress(zfs_cmd_t *zc) 4501 { 4502 dsl_pool_t *dp; 4503 dsl_dataset_t *ds; 4504 dmu_sendarg_t *dsp = NULL; 4505 int error; 4506 4507 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4508 if (error != 0) 4509 return (error); 4510 4511 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds); 4512 if (error != 0) { 4513 dsl_pool_rele(dp, FTAG); 4514 return (error); 4515 } 4516 4517 mutex_enter(&ds->ds_sendstream_lock); 4518 4519 /* 4520 * Iterate over all the send streams currently active on this dataset. 4521 * If there's one which matches the specified file descriptor _and_ the 4522 * stream was started by the current process, return the progress of 4523 * that stream. 4524 */ 4525 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL; 4526 dsp = list_next(&ds->ds_sendstreams, dsp)) { 4527 if (dsp->dsa_outfd == zc->zc_cookie && 4528 dsp->dsa_proc == curproc) 4529 break; 4530 } 4531 4532 if (dsp != NULL) 4533 zc->zc_cookie = *(dsp->dsa_off); 4534 else 4535 error = SET_ERROR(ENOENT); 4536 4537 mutex_exit(&ds->ds_sendstream_lock); 4538 dsl_dataset_rele(ds, FTAG); 4539 dsl_pool_rele(dp, FTAG); 4540 return (error); 4541 } 4542 4543 static int 4544 zfs_ioc_inject_fault(zfs_cmd_t *zc) 4545 { 4546 int id, error; 4547 4548 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 4549 &zc->zc_inject_record); 4550 4551 if (error == 0) 4552 zc->zc_guid = (uint64_t)id; 4553 4554 return (error); 4555 } 4556 4557 static int 4558 zfs_ioc_clear_fault(zfs_cmd_t *zc) 4559 { 4560 return (zio_clear_fault((int)zc->zc_guid)); 4561 } 4562 4563 static int 4564 zfs_ioc_inject_list_next(zfs_cmd_t *zc) 4565 { 4566 int id = (int)zc->zc_guid; 4567 int error; 4568 4569 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 4570 &zc->zc_inject_record); 4571 4572 zc->zc_guid = id; 4573 4574 return (error); 4575 } 4576 4577 static int 4578 zfs_ioc_error_log(zfs_cmd_t *zc) 4579 { 4580 spa_t *spa; 4581 int error; 4582 size_t count = (size_t)zc->zc_nvlist_dst_size; 4583 4584 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 4585 return (error); 4586 4587 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 4588 &count); 4589 if (error == 0) 4590 zc->zc_nvlist_dst_size = count; 4591 else 4592 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 4593 4594 spa_close(spa, FTAG); 4595 4596 return (error); 4597 } 4598 4599 static int 4600 zfs_ioc_clear(zfs_cmd_t *zc) 4601 { 4602 spa_t *spa; 4603 vdev_t *vd; 4604 int error; 4605 4606 /* 4607 * On zpool clear we also fix up missing slogs 4608 */ 4609 mutex_enter(&spa_namespace_lock); 4610 spa = spa_lookup(zc->zc_name); 4611 if (spa == NULL) { 4612 mutex_exit(&spa_namespace_lock); 4613 return (SET_ERROR(EIO)); 4614 } 4615 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 4616 /* we need to let spa_open/spa_load clear the chains */ 4617 spa_set_log_state(spa, SPA_LOG_CLEAR); 4618 } 4619 spa->spa_last_open_failed = 0; 4620 mutex_exit(&spa_namespace_lock); 4621 4622 if (zc->zc_cookie & ZPOOL_NO_REWIND) { 4623 error = spa_open(zc->zc_name, &spa, FTAG); 4624 } else { 4625 nvlist_t *policy; 4626 nvlist_t *config = NULL; 4627 4628 if (zc->zc_nvlist_src == NULL) 4629 return (SET_ERROR(EINVAL)); 4630 4631 if ((error = get_nvlist(zc->zc_nvlist_src, 4632 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 4633 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 4634 policy, &config); 4635 if (config != NULL) { 4636 int err; 4637 4638 if ((err = put_nvlist(zc, config)) != 0) 4639 error = err; 4640 nvlist_free(config); 4641 } 4642 nvlist_free(policy); 4643 } 4644 } 4645 4646 if (error != 0) 4647 return (error); 4648 4649 spa_vdev_state_enter(spa, SCL_NONE); 4650 4651 if (zc->zc_guid == 0) { 4652 vd = NULL; 4653 } else { 4654 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 4655 if (vd == NULL) { 4656 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 4657 spa_close(spa, FTAG); 4658 return (SET_ERROR(ENODEV)); 4659 } 4660 } 4661 4662 vdev_clear(spa, vd); 4663 4664 (void) spa_vdev_state_exit(spa, NULL, 0); 4665 4666 /* 4667 * Resume any suspended I/Os. 4668 */ 4669 if (zio_resume(spa) != 0) 4670 error = SET_ERROR(EIO); 4671 4672 spa_close(spa, FTAG); 4673 4674 return (error); 4675 } 4676 4677 static int 4678 zfs_ioc_pool_reopen(zfs_cmd_t *zc) 4679 { 4680 spa_t *spa; 4681 int error; 4682 4683 error = spa_open(zc->zc_name, &spa, FTAG); 4684 if (error != 0) 4685 return (error); 4686 4687 spa_vdev_state_enter(spa, SCL_NONE); 4688 4689 /* 4690 * If a resilver is already in progress then set the 4691 * spa_scrub_reopen flag to B_TRUE so that we don't restart 4692 * the scan as a side effect of the reopen. Otherwise, let 4693 * vdev_open() decided if a resilver is required. 4694 */ 4695 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool); 4696 vdev_reopen(spa->spa_root_vdev); 4697 spa->spa_scrub_reopen = B_FALSE; 4698 4699 (void) spa_vdev_state_exit(spa, NULL, 0); 4700 spa_close(spa, FTAG); 4701 return (0); 4702 } 4703 /* 4704 * inputs: 4705 * zc_name name of filesystem 4706 * 4707 * outputs: 4708 * zc_string name of conflicting snapshot, if there is one 4709 */ 4710 static int 4711 zfs_ioc_promote(zfs_cmd_t *zc) 4712 { 4713 dsl_pool_t *dp; 4714 dsl_dataset_t *ds, *ods; 4715 char origin[ZFS_MAX_DATASET_NAME_LEN]; 4716 char *cp; 4717 int error; 4718 4719 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4720 if (error != 0) 4721 return (error); 4722 4723 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds); 4724 if (error != 0) { 4725 dsl_pool_rele(dp, FTAG); 4726 return (error); 4727 } 4728 4729 if (!dsl_dir_is_clone(ds->ds_dir)) { 4730 dsl_dataset_rele(ds, FTAG); 4731 dsl_pool_rele(dp, FTAG); 4732 return (SET_ERROR(EINVAL)); 4733 } 4734 4735 error = dsl_dataset_hold_obj(dp, 4736 dsl_dir_phys(ds->ds_dir)->dd_origin_obj, FTAG, &ods); 4737 if (error != 0) { 4738 dsl_dataset_rele(ds, FTAG); 4739 dsl_pool_rele(dp, FTAG); 4740 return (error); 4741 } 4742 4743 dsl_dataset_name(ods, origin); 4744 dsl_dataset_rele(ods, FTAG); 4745 dsl_dataset_rele(ds, FTAG); 4746 dsl_pool_rele(dp, FTAG); 4747 4748 /* 4749 * We don't need to unmount *all* the origin fs's snapshots, but 4750 * it's easier. 4751 */ 4752 cp = strchr(origin, '@'); 4753 if (cp) 4754 *cp = '\0'; 4755 (void) dmu_objset_find(origin, 4756 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS); 4757 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 4758 } 4759 4760 /* 4761 * Retrieve a single {user|group}{used|quota}@... property. 4762 * 4763 * inputs: 4764 * zc_name name of filesystem 4765 * zc_objset_type zfs_userquota_prop_t 4766 * zc_value domain name (eg. "S-1-234-567-89") 4767 * zc_guid RID/UID/GID 4768 * 4769 * outputs: 4770 * zc_cookie property value 4771 */ 4772 static int 4773 zfs_ioc_userspace_one(zfs_cmd_t *zc) 4774 { 4775 zfsvfs_t *zfsvfs; 4776 int error; 4777 4778 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 4779 return (SET_ERROR(EINVAL)); 4780 4781 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4782 if (error != 0) 4783 return (error); 4784 4785 error = zfs_userspace_one(zfsvfs, 4786 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 4787 zfsvfs_rele(zfsvfs, FTAG); 4788 4789 return (error); 4790 } 4791 4792 /* 4793 * inputs: 4794 * zc_name name of filesystem 4795 * zc_cookie zap cursor 4796 * zc_objset_type zfs_userquota_prop_t 4797 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 4798 * 4799 * outputs: 4800 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 4801 * zc_cookie zap cursor 4802 */ 4803 static int 4804 zfs_ioc_userspace_many(zfs_cmd_t *zc) 4805 { 4806 zfsvfs_t *zfsvfs; 4807 int bufsize = zc->zc_nvlist_dst_size; 4808 4809 if (bufsize <= 0) 4810 return (SET_ERROR(ENOMEM)); 4811 4812 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4813 if (error != 0) 4814 return (error); 4815 4816 void *buf = kmem_alloc(bufsize, KM_SLEEP); 4817 4818 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 4819 buf, &zc->zc_nvlist_dst_size); 4820 4821 if (error == 0) { 4822 error = xcopyout(buf, 4823 (void *)(uintptr_t)zc->zc_nvlist_dst, 4824 zc->zc_nvlist_dst_size); 4825 } 4826 kmem_free(buf, bufsize); 4827 zfsvfs_rele(zfsvfs, FTAG); 4828 4829 return (error); 4830 } 4831 4832 /* 4833 * inputs: 4834 * zc_name name of filesystem 4835 * 4836 * outputs: 4837 * none 4838 */ 4839 static int 4840 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 4841 { 4842 objset_t *os; 4843 int error = 0; 4844 zfsvfs_t *zfsvfs; 4845 4846 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 4847 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 4848 /* 4849 * If userused is not enabled, it may be because the 4850 * objset needs to be closed & reopened (to grow the 4851 * objset_phys_t). Suspend/resume the fs will do that. 4852 */ 4853 dsl_dataset_t *ds; 4854 4855 ds = dmu_objset_ds(zfsvfs->z_os); 4856 error = zfs_suspend_fs(zfsvfs); 4857 if (error == 0) { 4858 dmu_objset_refresh_ownership(zfsvfs->z_os, 4859 zfsvfs); 4860 error = zfs_resume_fs(zfsvfs, ds); 4861 } 4862 } 4863 if (error == 0) 4864 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 4865 VFS_RELE(zfsvfs->z_vfs); 4866 } else { 4867 /* XXX kind of reading contents without owning */ 4868 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4869 if (error != 0) 4870 return (error); 4871 4872 error = dmu_objset_userspace_upgrade(os); 4873 dmu_objset_rele(os, FTAG); 4874 } 4875 4876 return (error); 4877 } 4878 4879 /* 4880 * We don't want to have a hard dependency 4881 * against some special symbols in sharefs 4882 * nfs, and smbsrv. Determine them if needed when 4883 * the first file system is shared. 4884 * Neither sharefs, nfs or smbsrv are unloadable modules. 4885 */ 4886 int (*znfsexport_fs)(void *arg); 4887 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 4888 int (*zsmbexport_fs)(void *arg, boolean_t add_share); 4889 4890 int zfs_nfsshare_inited; 4891 int zfs_smbshare_inited; 4892 4893 ddi_modhandle_t nfs_mod; 4894 ddi_modhandle_t sharefs_mod; 4895 ddi_modhandle_t smbsrv_mod; 4896 kmutex_t zfs_share_lock; 4897 4898 static int 4899 zfs_init_sharefs() 4900 { 4901 int error; 4902 4903 ASSERT(MUTEX_HELD(&zfs_share_lock)); 4904 /* Both NFS and SMB shares also require sharetab support. */ 4905 if (sharefs_mod == NULL && ((sharefs_mod = 4906 ddi_modopen("fs/sharefs", 4907 KRTLD_MODE_FIRST, &error)) == NULL)) { 4908 return (SET_ERROR(ENOSYS)); 4909 } 4910 if (zshare_fs == NULL && ((zshare_fs = 4911 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 4912 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 4913 return (SET_ERROR(ENOSYS)); 4914 } 4915 return (0); 4916 } 4917 4918 static int 4919 zfs_ioc_share(zfs_cmd_t *zc) 4920 { 4921 int error; 4922 int opcode; 4923 4924 switch (zc->zc_share.z_sharetype) { 4925 case ZFS_SHARE_NFS: 4926 case ZFS_UNSHARE_NFS: 4927 if (zfs_nfsshare_inited == 0) { 4928 mutex_enter(&zfs_share_lock); 4929 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 4930 KRTLD_MODE_FIRST, &error)) == NULL)) { 4931 mutex_exit(&zfs_share_lock); 4932 return (SET_ERROR(ENOSYS)); 4933 } 4934 if (znfsexport_fs == NULL && 4935 ((znfsexport_fs = (int (*)(void *)) 4936 ddi_modsym(nfs_mod, 4937 "nfs_export", &error)) == NULL)) { 4938 mutex_exit(&zfs_share_lock); 4939 return (SET_ERROR(ENOSYS)); 4940 } 4941 error = zfs_init_sharefs(); 4942 if (error != 0) { 4943 mutex_exit(&zfs_share_lock); 4944 return (SET_ERROR(ENOSYS)); 4945 } 4946 zfs_nfsshare_inited = 1; 4947 mutex_exit(&zfs_share_lock); 4948 } 4949 break; 4950 case ZFS_SHARE_SMB: 4951 case ZFS_UNSHARE_SMB: 4952 if (zfs_smbshare_inited == 0) { 4953 mutex_enter(&zfs_share_lock); 4954 if (smbsrv_mod == NULL && ((smbsrv_mod = 4955 ddi_modopen("drv/smbsrv", 4956 KRTLD_MODE_FIRST, &error)) == NULL)) { 4957 mutex_exit(&zfs_share_lock); 4958 return (SET_ERROR(ENOSYS)); 4959 } 4960 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 4961 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 4962 "smb_server_share", &error)) == NULL)) { 4963 mutex_exit(&zfs_share_lock); 4964 return (SET_ERROR(ENOSYS)); 4965 } 4966 error = zfs_init_sharefs(); 4967 if (error != 0) { 4968 mutex_exit(&zfs_share_lock); 4969 return (SET_ERROR(ENOSYS)); 4970 } 4971 zfs_smbshare_inited = 1; 4972 mutex_exit(&zfs_share_lock); 4973 } 4974 break; 4975 default: 4976 return (SET_ERROR(EINVAL)); 4977 } 4978 4979 switch (zc->zc_share.z_sharetype) { 4980 case ZFS_SHARE_NFS: 4981 case ZFS_UNSHARE_NFS: 4982 if (error = 4983 znfsexport_fs((void *) 4984 (uintptr_t)zc->zc_share.z_exportdata)) 4985 return (error); 4986 break; 4987 case ZFS_SHARE_SMB: 4988 case ZFS_UNSHARE_SMB: 4989 if (error = zsmbexport_fs((void *) 4990 (uintptr_t)zc->zc_share.z_exportdata, 4991 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 4992 B_TRUE: B_FALSE)) { 4993 return (error); 4994 } 4995 break; 4996 } 4997 4998 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 4999 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 5000 SHAREFS_ADD : SHAREFS_REMOVE; 5001 5002 /* 5003 * Add or remove share from sharetab 5004 */ 5005 error = zshare_fs(opcode, 5006 (void *)(uintptr_t)zc->zc_share.z_sharedata, 5007 zc->zc_share.z_sharemax); 5008 5009 return (error); 5010 5011 } 5012 5013 ace_t full_access[] = { 5014 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 5015 }; 5016 5017 /* 5018 * inputs: 5019 * zc_name name of containing filesystem 5020 * zc_obj object # beyond which we want next in-use object # 5021 * 5022 * outputs: 5023 * zc_obj next in-use object # 5024 */ 5025 static int 5026 zfs_ioc_next_obj(zfs_cmd_t *zc) 5027 { 5028 objset_t *os = NULL; 5029 int error; 5030 5031 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 5032 if (error != 0) 5033 return (error); 5034 5035 error = dmu_object_next(os, &zc->zc_obj, B_FALSE, 5036 dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg); 5037 5038 dmu_objset_rele(os, FTAG); 5039 return (error); 5040 } 5041 5042 /* 5043 * inputs: 5044 * zc_name name of filesystem 5045 * zc_value prefix name for snapshot 5046 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 5047 * 5048 * outputs: 5049 * zc_value short name of new snapshot 5050 */ 5051 static int 5052 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc) 5053 { 5054 char *snap_name; 5055 char *hold_name; 5056 int error; 5057 minor_t minor; 5058 5059 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor); 5060 if (error != 0) 5061 return (error); 5062 5063 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value, 5064 (u_longlong_t)ddi_get_lbolt64()); 5065 hold_name = kmem_asprintf("%%%s", zc->zc_value); 5066 5067 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor, 5068 hold_name); 5069 if (error == 0) 5070 (void) strcpy(zc->zc_value, snap_name); 5071 strfree(snap_name); 5072 strfree(hold_name); 5073 zfs_onexit_fd_rele(zc->zc_cleanup_fd); 5074 return (error); 5075 } 5076 5077 /* 5078 * inputs: 5079 * zc_name name of "to" snapshot 5080 * zc_value name of "from" snapshot 5081 * zc_cookie file descriptor to write diff data on 5082 * 5083 * outputs: 5084 * dmu_diff_record_t's to the file descriptor 5085 */ 5086 static int 5087 zfs_ioc_diff(zfs_cmd_t *zc) 5088 { 5089 file_t *fp; 5090 offset_t off; 5091 int error; 5092 5093 fp = getf(zc->zc_cookie); 5094 if (fp == NULL) 5095 return (SET_ERROR(EBADF)); 5096 5097 off = fp->f_offset; 5098 5099 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off); 5100 5101 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5102 fp->f_offset = off; 5103 releasef(zc->zc_cookie); 5104 5105 return (error); 5106 } 5107 5108 /* 5109 * Remove all ACL files in shares dir 5110 */ 5111 static int 5112 zfs_smb_acl_purge(znode_t *dzp) 5113 { 5114 zap_cursor_t zc; 5115 zap_attribute_t zap; 5116 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 5117 int error; 5118 5119 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 5120 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 5121 zap_cursor_advance(&zc)) { 5122 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 5123 NULL, 0)) != 0) 5124 break; 5125 } 5126 zap_cursor_fini(&zc); 5127 return (error); 5128 } 5129 5130 static int 5131 zfs_ioc_smb_acl(zfs_cmd_t *zc) 5132 { 5133 vnode_t *vp; 5134 znode_t *dzp; 5135 vnode_t *resourcevp = NULL; 5136 znode_t *sharedir; 5137 zfsvfs_t *zfsvfs; 5138 nvlist_t *nvlist; 5139 char *src, *target; 5140 vattr_t vattr; 5141 vsecattr_t vsec; 5142 int error = 0; 5143 5144 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 5145 NO_FOLLOW, NULL, &vp)) != 0) 5146 return (error); 5147 5148 /* Now make sure mntpnt and dataset are ZFS */ 5149 5150 if (vp->v_vfsp->vfs_fstype != zfsfstype || 5151 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 5152 zc->zc_name) != 0)) { 5153 VN_RELE(vp); 5154 return (SET_ERROR(EINVAL)); 5155 } 5156 5157 dzp = VTOZ(vp); 5158 zfsvfs = dzp->z_zfsvfs; 5159 ZFS_ENTER(zfsvfs); 5160 5161 /* 5162 * Create share dir if its missing. 5163 */ 5164 mutex_enter(&zfsvfs->z_lock); 5165 if (zfsvfs->z_shares_dir == 0) { 5166 dmu_tx_t *tx; 5167 5168 tx = dmu_tx_create(zfsvfs->z_os); 5169 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 5170 ZFS_SHARES_DIR); 5171 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 5172 error = dmu_tx_assign(tx, TXG_WAIT); 5173 if (error != 0) { 5174 dmu_tx_abort(tx); 5175 } else { 5176 error = zfs_create_share_dir(zfsvfs, tx); 5177 dmu_tx_commit(tx); 5178 } 5179 if (error != 0) { 5180 mutex_exit(&zfsvfs->z_lock); 5181 VN_RELE(vp); 5182 ZFS_EXIT(zfsvfs); 5183 return (error); 5184 } 5185 } 5186 mutex_exit(&zfsvfs->z_lock); 5187 5188 ASSERT(zfsvfs->z_shares_dir); 5189 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 5190 VN_RELE(vp); 5191 ZFS_EXIT(zfsvfs); 5192 return (error); 5193 } 5194 5195 switch (zc->zc_cookie) { 5196 case ZFS_SMB_ACL_ADD: 5197 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 5198 vattr.va_type = VREG; 5199 vattr.va_mode = S_IFREG|0777; 5200 vattr.va_uid = 0; 5201 vattr.va_gid = 0; 5202 5203 vsec.vsa_mask = VSA_ACE; 5204 vsec.vsa_aclentp = &full_access; 5205 vsec.vsa_aclentsz = sizeof (full_access); 5206 vsec.vsa_aclcnt = 1; 5207 5208 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 5209 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 5210 if (resourcevp) 5211 VN_RELE(resourcevp); 5212 break; 5213 5214 case ZFS_SMB_ACL_REMOVE: 5215 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 5216 NULL, 0); 5217 break; 5218 5219 case ZFS_SMB_ACL_RENAME: 5220 if ((error = get_nvlist(zc->zc_nvlist_src, 5221 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 5222 VN_RELE(vp); 5223 VN_RELE(ZTOV(sharedir)); 5224 ZFS_EXIT(zfsvfs); 5225 return (error); 5226 } 5227 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 5228 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 5229 &target)) { 5230 VN_RELE(vp); 5231 VN_RELE(ZTOV(sharedir)); 5232 ZFS_EXIT(zfsvfs); 5233 nvlist_free(nvlist); 5234 return (error); 5235 } 5236 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 5237 kcred, NULL, 0); 5238 nvlist_free(nvlist); 5239 break; 5240 5241 case ZFS_SMB_ACL_PURGE: 5242 error = zfs_smb_acl_purge(sharedir); 5243 break; 5244 5245 default: 5246 error = SET_ERROR(EINVAL); 5247 break; 5248 } 5249 5250 VN_RELE(vp); 5251 VN_RELE(ZTOV(sharedir)); 5252 5253 ZFS_EXIT(zfsvfs); 5254 5255 return (error); 5256 } 5257 5258 /* 5259 * innvl: { 5260 * "holds" -> { snapname -> holdname (string), ... } 5261 * (optional) "cleanup_fd" -> fd (int32) 5262 * } 5263 * 5264 * outnvl: { 5265 * snapname -> error value (int32) 5266 * ... 5267 * } 5268 */ 5269 /* ARGSUSED */ 5270 static int 5271 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist) 5272 { 5273 nvpair_t *pair; 5274 nvlist_t *holds; 5275 int cleanup_fd = -1; 5276 int error; 5277 minor_t minor = 0; 5278 5279 error = nvlist_lookup_nvlist(args, "holds", &holds); 5280 if (error != 0) 5281 return (SET_ERROR(EINVAL)); 5282 5283 /* make sure the user didn't pass us any invalid (empty) tags */ 5284 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; 5285 pair = nvlist_next_nvpair(holds, pair)) { 5286 char *htag; 5287 5288 error = nvpair_value_string(pair, &htag); 5289 if (error != 0) 5290 return (SET_ERROR(error)); 5291 5292 if (strlen(htag) == 0) 5293 return (SET_ERROR(EINVAL)); 5294 } 5295 5296 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) { 5297 error = zfs_onexit_fd_hold(cleanup_fd, &minor); 5298 if (error != 0) 5299 return (error); 5300 } 5301 5302 error = dsl_dataset_user_hold(holds, minor, errlist); 5303 if (minor != 0) 5304 zfs_onexit_fd_rele(cleanup_fd); 5305 return (error); 5306 } 5307 5308 /* 5309 * innvl is not used. 5310 * 5311 * outnvl: { 5312 * holdname -> time added (uint64 seconds since epoch) 5313 * ... 5314 * } 5315 */ 5316 /* ARGSUSED */ 5317 static int 5318 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl) 5319 { 5320 return (dsl_dataset_get_holds(snapname, outnvl)); 5321 } 5322 5323 /* 5324 * innvl: { 5325 * snapname -> { holdname, ... } 5326 * ... 5327 * } 5328 * 5329 * outnvl: { 5330 * snapname -> error value (int32) 5331 * ... 5332 * } 5333 */ 5334 /* ARGSUSED */ 5335 static int 5336 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist) 5337 { 5338 return (dsl_dataset_user_release(holds, errlist)); 5339 } 5340 5341 /* 5342 * inputs: 5343 * zc_name name of new filesystem or snapshot 5344 * zc_value full name of old snapshot 5345 * 5346 * outputs: 5347 * zc_cookie space in bytes 5348 * zc_objset_type compressed space in bytes 5349 * zc_perm_action uncompressed space in bytes 5350 */ 5351 static int 5352 zfs_ioc_space_written(zfs_cmd_t *zc) 5353 { 5354 int error; 5355 dsl_pool_t *dp; 5356 dsl_dataset_t *new, *old; 5357 5358 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 5359 if (error != 0) 5360 return (error); 5361 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new); 5362 if (error != 0) { 5363 dsl_pool_rele(dp, FTAG); 5364 return (error); 5365 } 5366 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old); 5367 if (error != 0) { 5368 dsl_dataset_rele(new, FTAG); 5369 dsl_pool_rele(dp, FTAG); 5370 return (error); 5371 } 5372 5373 error = dsl_dataset_space_written(old, new, &zc->zc_cookie, 5374 &zc->zc_objset_type, &zc->zc_perm_action); 5375 dsl_dataset_rele(old, FTAG); 5376 dsl_dataset_rele(new, FTAG); 5377 dsl_pool_rele(dp, FTAG); 5378 return (error); 5379 } 5380 5381 /* 5382 * innvl: { 5383 * "firstsnap" -> snapshot name 5384 * } 5385 * 5386 * outnvl: { 5387 * "used" -> space in bytes 5388 * "compressed" -> compressed space in bytes 5389 * "uncompressed" -> uncompressed space in bytes 5390 * } 5391 */ 5392 static int 5393 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl) 5394 { 5395 int error; 5396 dsl_pool_t *dp; 5397 dsl_dataset_t *new, *old; 5398 char *firstsnap; 5399 uint64_t used, comp, uncomp; 5400 5401 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0) 5402 return (SET_ERROR(EINVAL)); 5403 5404 error = dsl_pool_hold(lastsnap, FTAG, &dp); 5405 if (error != 0) 5406 return (error); 5407 5408 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new); 5409 if (error == 0 && !new->ds_is_snapshot) { 5410 dsl_dataset_rele(new, FTAG); 5411 error = SET_ERROR(EINVAL); 5412 } 5413 if (error != 0) { 5414 dsl_pool_rele(dp, FTAG); 5415 return (error); 5416 } 5417 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old); 5418 if (error == 0 && !old->ds_is_snapshot) { 5419 dsl_dataset_rele(old, FTAG); 5420 error = SET_ERROR(EINVAL); 5421 } 5422 if (error != 0) { 5423 dsl_dataset_rele(new, FTAG); 5424 dsl_pool_rele(dp, FTAG); 5425 return (error); 5426 } 5427 5428 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp); 5429 dsl_dataset_rele(old, FTAG); 5430 dsl_dataset_rele(new, FTAG); 5431 dsl_pool_rele(dp, FTAG); 5432 fnvlist_add_uint64(outnvl, "used", used); 5433 fnvlist_add_uint64(outnvl, "compressed", comp); 5434 fnvlist_add_uint64(outnvl, "uncompressed", uncomp); 5435 return (error); 5436 } 5437 5438 /* 5439 * innvl: { 5440 * "fd" -> file descriptor to write stream to (int32) 5441 * (optional) "fromsnap" -> full snap name to send an incremental from 5442 * (optional) "largeblockok" -> (value ignored) 5443 * indicates that blocks > 128KB are permitted 5444 * (optional) "embedok" -> (value ignored) 5445 * presence indicates DRR_WRITE_EMBEDDED records are permitted 5446 * (optional) "compressok" -> (value ignored) 5447 * presence indicates compressed DRR_WRITE records are permitted 5448 * (optional) "resume_object" and "resume_offset" -> (uint64) 5449 * if present, resume send stream from specified object and offset. 5450 * } 5451 * 5452 * outnvl is unused 5453 */ 5454 /* ARGSUSED */ 5455 static int 5456 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5457 { 5458 int error; 5459 offset_t off; 5460 char *fromname = NULL; 5461 int fd; 5462 boolean_t largeblockok; 5463 boolean_t embedok; 5464 boolean_t compressok; 5465 uint64_t resumeobj = 0; 5466 uint64_t resumeoff = 0; 5467 5468 error = nvlist_lookup_int32(innvl, "fd", &fd); 5469 if (error != 0) 5470 return (SET_ERROR(EINVAL)); 5471 5472 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname); 5473 5474 largeblockok = nvlist_exists(innvl, "largeblockok"); 5475 embedok = nvlist_exists(innvl, "embedok"); 5476 compressok = nvlist_exists(innvl, "compressok"); 5477 5478 (void) nvlist_lookup_uint64(innvl, "resume_object", &resumeobj); 5479 (void) nvlist_lookup_uint64(innvl, "resume_offset", &resumeoff); 5480 5481 file_t *fp = getf(fd); 5482 if (fp == NULL) 5483 return (SET_ERROR(EBADF)); 5484 5485 off = fp->f_offset; 5486 error = dmu_send(snapname, fromname, embedok, largeblockok, compressok, 5487 fd, resumeobj, resumeoff, fp->f_vnode, &off); 5488 5489 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5490 fp->f_offset = off; 5491 releasef(fd); 5492 return (error); 5493 } 5494 5495 /* 5496 * Determine approximately how large a zfs send stream will be -- the number 5497 * of bytes that will be written to the fd supplied to zfs_ioc_send_new(). 5498 * 5499 * innvl: { 5500 * (optional) "from" -> full snap or bookmark name to send an incremental 5501 * from 5502 * (optional) "largeblockok" -> (value ignored) 5503 * indicates that blocks > 128KB are permitted 5504 * (optional) "embedok" -> (value ignored) 5505 * presence indicates DRR_WRITE_EMBEDDED records are permitted 5506 * (optional) "compressok" -> (value ignored) 5507 * presence indicates compressed DRR_WRITE records are permitted 5508 * } 5509 * 5510 * outnvl: { 5511 * "space" -> bytes of space (uint64) 5512 * } 5513 */ 5514 static int 5515 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5516 { 5517 dsl_pool_t *dp; 5518 dsl_dataset_t *tosnap; 5519 int error; 5520 char *fromname; 5521 /* LINTED E_FUNC_SET_NOT_USED */ 5522 boolean_t largeblockok; 5523 /* LINTED E_FUNC_SET_NOT_USED */ 5524 boolean_t embedok; 5525 boolean_t compressok; 5526 uint64_t space; 5527 5528 error = dsl_pool_hold(snapname, FTAG, &dp); 5529 if (error != 0) 5530 return (error); 5531 5532 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap); 5533 if (error != 0) { 5534 dsl_pool_rele(dp, FTAG); 5535 return (error); 5536 } 5537 5538 largeblockok = nvlist_exists(innvl, "largeblockok"); 5539 embedok = nvlist_exists(innvl, "embedok"); 5540 compressok = nvlist_exists(innvl, "compressok"); 5541 5542 error = nvlist_lookup_string(innvl, "from", &fromname); 5543 if (error == 0) { 5544 if (strchr(fromname, '@') != NULL) { 5545 /* 5546 * If from is a snapshot, hold it and use the more 5547 * efficient dmu_send_estimate to estimate send space 5548 * size using deadlists. 5549 */ 5550 dsl_dataset_t *fromsnap; 5551 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap); 5552 if (error != 0) 5553 goto out; 5554 error = dmu_send_estimate(tosnap, fromsnap, compressok, 5555 &space); 5556 dsl_dataset_rele(fromsnap, FTAG); 5557 } else if (strchr(fromname, '#') != NULL) { 5558 /* 5559 * If from is a bookmark, fetch the creation TXG of the 5560 * snapshot it was created from and use that to find 5561 * blocks that were born after it. 5562 */ 5563 zfs_bookmark_phys_t frombm; 5564 5565 error = dsl_bookmark_lookup(dp, fromname, tosnap, 5566 &frombm); 5567 if (error != 0) 5568 goto out; 5569 error = dmu_send_estimate_from_txg(tosnap, 5570 frombm.zbm_creation_txg, compressok, &space); 5571 } else { 5572 /* 5573 * from is not properly formatted as a snapshot or 5574 * bookmark 5575 */ 5576 error = SET_ERROR(EINVAL); 5577 goto out; 5578 } 5579 } else { 5580 // If estimating the size of a full send, use dmu_send_estimate 5581 error = dmu_send_estimate(tosnap, NULL, compressok, &space); 5582 } 5583 5584 fnvlist_add_uint64(outnvl, "space", space); 5585 5586 out: 5587 dsl_dataset_rele(tosnap, FTAG); 5588 dsl_pool_rele(dp, FTAG); 5589 return (error); 5590 } 5591 5592 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST]; 5593 5594 static void 5595 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5596 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5597 boolean_t log_history, zfs_ioc_poolcheck_t pool_check) 5598 { 5599 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5600 5601 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5602 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5603 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5604 ASSERT3P(vec->zvec_func, ==, NULL); 5605 5606 vec->zvec_legacy_func = func; 5607 vec->zvec_secpolicy = secpolicy; 5608 vec->zvec_namecheck = namecheck; 5609 vec->zvec_allow_log = log_history; 5610 vec->zvec_pool_check = pool_check; 5611 } 5612 5613 /* 5614 * See the block comment at the beginning of this file for details on 5615 * each argument to this function. 5616 */ 5617 static void 5618 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func, 5619 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5620 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist, 5621 boolean_t allow_log) 5622 { 5623 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5624 5625 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5626 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5627 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5628 ASSERT3P(vec->zvec_func, ==, NULL); 5629 5630 /* if we are logging, the name must be valid */ 5631 ASSERT(!allow_log || namecheck != NO_NAME); 5632 5633 vec->zvec_name = name; 5634 vec->zvec_func = func; 5635 vec->zvec_secpolicy = secpolicy; 5636 vec->zvec_namecheck = namecheck; 5637 vec->zvec_pool_check = pool_check; 5638 vec->zvec_smush_outnvlist = smush_outnvlist; 5639 vec->zvec_allow_log = allow_log; 5640 } 5641 5642 static void 5643 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5644 zfs_secpolicy_func_t *secpolicy, boolean_t log_history, 5645 zfs_ioc_poolcheck_t pool_check) 5646 { 5647 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5648 POOL_NAME, log_history, pool_check); 5649 } 5650 5651 static void 5652 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5653 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check) 5654 { 5655 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5656 DATASET_NAME, B_FALSE, pool_check); 5657 } 5658 5659 static void 5660 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5661 { 5662 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config, 5663 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5664 } 5665 5666 static void 5667 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5668 zfs_secpolicy_func_t *secpolicy) 5669 { 5670 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5671 NO_NAME, B_FALSE, POOL_CHECK_NONE); 5672 } 5673 5674 static void 5675 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc, 5676 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy) 5677 { 5678 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5679 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED); 5680 } 5681 5682 static void 5683 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5684 { 5685 zfs_ioctl_register_dataset_read_secpolicy(ioc, func, 5686 zfs_secpolicy_read); 5687 } 5688 5689 static void 5690 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5691 zfs_secpolicy_func_t *secpolicy) 5692 { 5693 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5694 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5695 } 5696 5697 static void 5698 zfs_ioctl_init(void) 5699 { 5700 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT, 5701 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME, 5702 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5703 5704 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY, 5705 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME, 5706 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE); 5707 5708 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS, 5709 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME, 5710 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5711 5712 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW, 5713 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME, 5714 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5715 5716 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE, 5717 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME, 5718 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5719 5720 zfs_ioctl_register("create", ZFS_IOC_CREATE, 5721 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME, 5722 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5723 5724 zfs_ioctl_register("clone", ZFS_IOC_CLONE, 5725 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME, 5726 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5727 5728 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS, 5729 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME, 5730 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5731 5732 zfs_ioctl_register("hold", ZFS_IOC_HOLD, 5733 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME, 5734 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5735 zfs_ioctl_register("release", ZFS_IOC_RELEASE, 5736 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME, 5737 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5738 5739 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS, 5740 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, 5741 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5742 5743 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK, 5744 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, 5745 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE); 5746 5747 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK, 5748 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME, 5749 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5750 5751 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS, 5752 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME, 5753 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5754 5755 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS, 5756 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks, 5757 POOL_NAME, 5758 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5759 5760 /* IOCTLS that use the legacy function signature */ 5761 5762 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze, 5763 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY); 5764 5765 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create, 5766 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5767 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN, 5768 zfs_ioc_pool_scan); 5769 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE, 5770 zfs_ioc_pool_upgrade); 5771 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD, 5772 zfs_ioc_vdev_add); 5773 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE, 5774 zfs_ioc_vdev_remove); 5775 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE, 5776 zfs_ioc_vdev_set_state); 5777 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH, 5778 zfs_ioc_vdev_attach); 5779 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH, 5780 zfs_ioc_vdev_detach); 5781 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH, 5782 zfs_ioc_vdev_setpath); 5783 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU, 5784 zfs_ioc_vdev_setfru); 5785 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS, 5786 zfs_ioc_pool_set_props); 5787 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT, 5788 zfs_ioc_vdev_split); 5789 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID, 5790 zfs_ioc_pool_reguid); 5791 5792 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS, 5793 zfs_ioc_pool_configs, zfs_secpolicy_none); 5794 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT, 5795 zfs_ioc_pool_tryimport, zfs_secpolicy_config); 5796 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT, 5797 zfs_ioc_inject_fault, zfs_secpolicy_inject); 5798 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT, 5799 zfs_ioc_clear_fault, zfs_secpolicy_inject); 5800 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT, 5801 zfs_ioc_inject_list_next, zfs_secpolicy_inject); 5802 5803 /* 5804 * pool destroy, and export don't log the history as part of 5805 * zfsdev_ioctl, but rather zfs_ioc_pool_export 5806 * does the logging of those commands. 5807 */ 5808 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy, 5809 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5810 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export, 5811 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5812 5813 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats, 5814 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5815 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props, 5816 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5817 5818 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log, 5819 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED); 5820 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME, 5821 zfs_ioc_dsobj_to_dsname, 5822 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED); 5823 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY, 5824 zfs_ioc_pool_get_history, 5825 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED); 5826 5827 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import, 5828 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5829 5830 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear, 5831 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5832 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen, 5833 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED); 5834 5835 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN, 5836 zfs_ioc_space_written); 5837 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS, 5838 zfs_ioc_objset_recvd_props); 5839 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ, 5840 zfs_ioc_next_obj); 5841 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL, 5842 zfs_ioc_get_fsacl); 5843 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS, 5844 zfs_ioc_objset_stats); 5845 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS, 5846 zfs_ioc_objset_zplprops); 5847 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT, 5848 zfs_ioc_dataset_list_next); 5849 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT, 5850 zfs_ioc_snapshot_list_next); 5851 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS, 5852 zfs_ioc_send_progress); 5853 5854 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF, 5855 zfs_ioc_diff, zfs_secpolicy_diff); 5856 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS, 5857 zfs_ioc_obj_to_stats, zfs_secpolicy_diff); 5858 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH, 5859 zfs_ioc_obj_to_path, zfs_secpolicy_diff); 5860 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE, 5861 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one); 5862 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY, 5863 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many); 5864 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND, 5865 zfs_ioc_send, zfs_secpolicy_send); 5866 5867 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop, 5868 zfs_secpolicy_none); 5869 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy, 5870 zfs_secpolicy_destroy); 5871 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename, 5872 zfs_secpolicy_rename); 5873 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv, 5874 zfs_secpolicy_recv); 5875 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote, 5876 zfs_secpolicy_promote); 5877 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP, 5878 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop); 5879 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl, 5880 zfs_secpolicy_set_fsacl); 5881 5882 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share, 5883 zfs_secpolicy_share, POOL_CHECK_NONE); 5884 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl, 5885 zfs_secpolicy_smb_acl, POOL_CHECK_NONE); 5886 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE, 5887 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 5888 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5889 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT, 5890 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, 5891 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5892 } 5893 5894 int 5895 pool_status_check(const char *name, zfs_ioc_namecheck_t type, 5896 zfs_ioc_poolcheck_t check) 5897 { 5898 spa_t *spa; 5899 int error; 5900 5901 ASSERT(type == POOL_NAME || type == DATASET_NAME); 5902 5903 if (check & POOL_CHECK_NONE) 5904 return (0); 5905 5906 error = spa_open(name, &spa, FTAG); 5907 if (error == 0) { 5908 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa)) 5909 error = SET_ERROR(EAGAIN); 5910 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa)) 5911 error = SET_ERROR(EROFS); 5912 spa_close(spa, FTAG); 5913 } 5914 return (error); 5915 } 5916 5917 /* 5918 * Find a free minor number. 5919 */ 5920 minor_t 5921 zfsdev_minor_alloc(void) 5922 { 5923 static minor_t last_minor; 5924 minor_t m; 5925 5926 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5927 5928 for (m = last_minor + 1; m != last_minor; m++) { 5929 if (m > ZFSDEV_MAX_MINOR) 5930 m = 1; 5931 if (ddi_get_soft_state(zfsdev_state, m) == NULL) { 5932 last_minor = m; 5933 return (m); 5934 } 5935 } 5936 5937 return (0); 5938 } 5939 5940 static int 5941 zfs_ctldev_init(dev_t *devp) 5942 { 5943 minor_t minor; 5944 zfs_soft_state_t *zs; 5945 5946 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5947 ASSERT(getminor(*devp) == 0); 5948 5949 minor = zfsdev_minor_alloc(); 5950 if (minor == 0) 5951 return (SET_ERROR(ENXIO)); 5952 5953 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) 5954 return (SET_ERROR(EAGAIN)); 5955 5956 *devp = makedevice(getemajor(*devp), minor); 5957 5958 zs = ddi_get_soft_state(zfsdev_state, minor); 5959 zs->zss_type = ZSST_CTLDEV; 5960 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data); 5961 5962 return (0); 5963 } 5964 5965 static void 5966 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor) 5967 { 5968 ASSERT(MUTEX_HELD(&zfsdev_state_lock)); 5969 5970 zfs_onexit_destroy(zo); 5971 ddi_soft_state_free(zfsdev_state, minor); 5972 } 5973 5974 void * 5975 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which) 5976 { 5977 zfs_soft_state_t *zp; 5978 5979 zp = ddi_get_soft_state(zfsdev_state, minor); 5980 if (zp == NULL || zp->zss_type != which) 5981 return (NULL); 5982 5983 return (zp->zss_data); 5984 } 5985 5986 static int 5987 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr) 5988 { 5989 int error = 0; 5990 5991 if (getminor(*devp) != 0) 5992 return (zvol_open(devp, flag, otyp, cr)); 5993 5994 /* This is the control device. Allocate a new minor if requested. */ 5995 if (flag & FEXCL) { 5996 mutex_enter(&zfsdev_state_lock); 5997 error = zfs_ctldev_init(devp); 5998 mutex_exit(&zfsdev_state_lock); 5999 } 6000 6001 return (error); 6002 } 6003 6004 static int 6005 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr) 6006 { 6007 zfs_onexit_t *zo; 6008 minor_t minor = getminor(dev); 6009 6010 if (minor == 0) 6011 return (0); 6012 6013 mutex_enter(&zfsdev_state_lock); 6014 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV); 6015 if (zo == NULL) { 6016 mutex_exit(&zfsdev_state_lock); 6017 return (zvol_close(dev, flag, otyp, cr)); 6018 } 6019 zfs_ctldev_destroy(zo, minor); 6020 mutex_exit(&zfsdev_state_lock); 6021 6022 return (0); 6023 } 6024 6025 static int 6026 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) 6027 { 6028 zfs_cmd_t *zc; 6029 uint_t vecnum; 6030 int error, rc, len; 6031 minor_t minor = getminor(dev); 6032 const zfs_ioc_vec_t *vec; 6033 char *saved_poolname = NULL; 6034 nvlist_t *innvl = NULL; 6035 6036 if (minor != 0 && 6037 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL) 6038 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp)); 6039 6040 vecnum = cmd - ZFS_IOC_FIRST; 6041 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 6042 6043 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 6044 return (SET_ERROR(EINVAL)); 6045 vec = &zfs_ioc_vec[vecnum]; 6046 6047 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 6048 6049 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 6050 if (error != 0) { 6051 error = SET_ERROR(EFAULT); 6052 goto out; 6053 } 6054 6055 zc->zc_iflags = flag & FKIOCTL; 6056 if (zc->zc_nvlist_src_size != 0) { 6057 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 6058 zc->zc_iflags, &innvl); 6059 if (error != 0) 6060 goto out; 6061 } 6062 6063 /* 6064 * Ensure that all pool/dataset names are valid before we pass down to 6065 * the lower layers. 6066 */ 6067 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 6068 switch (vec->zvec_namecheck) { 6069 case POOL_NAME: 6070 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 6071 error = SET_ERROR(EINVAL); 6072 else 6073 error = pool_status_check(zc->zc_name, 6074 vec->zvec_namecheck, vec->zvec_pool_check); 6075 break; 6076 6077 case DATASET_NAME: 6078 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 6079 error = SET_ERROR(EINVAL); 6080 else 6081 error = pool_status_check(zc->zc_name, 6082 vec->zvec_namecheck, vec->zvec_pool_check); 6083 break; 6084 6085 case NO_NAME: 6086 break; 6087 } 6088 6089 6090 if (error == 0) 6091 error = vec->zvec_secpolicy(zc, innvl, cr); 6092 6093 if (error != 0) 6094 goto out; 6095 6096 /* legacy ioctls can modify zc_name */ 6097 len = strcspn(zc->zc_name, "/@#") + 1; 6098 saved_poolname = kmem_alloc(len, KM_SLEEP); 6099 (void) strlcpy(saved_poolname, zc->zc_name, len); 6100 6101 if (vec->zvec_func != NULL) { 6102 nvlist_t *outnvl; 6103 int puterror = 0; 6104 spa_t *spa; 6105 nvlist_t *lognv = NULL; 6106 6107 ASSERT(vec->zvec_legacy_func == NULL); 6108 6109 /* 6110 * Add the innvl to the lognv before calling the func, 6111 * in case the func changes the innvl. 6112 */ 6113 if (vec->zvec_allow_log) { 6114 lognv = fnvlist_alloc(); 6115 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL, 6116 vec->zvec_name); 6117 if (!nvlist_empty(innvl)) { 6118 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL, 6119 innvl); 6120 } 6121 } 6122 6123 outnvl = fnvlist_alloc(); 6124 error = vec->zvec_func(zc->zc_name, innvl, outnvl); 6125 6126 if (error == 0 && vec->zvec_allow_log && 6127 spa_open(zc->zc_name, &spa, FTAG) == 0) { 6128 if (!nvlist_empty(outnvl)) { 6129 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL, 6130 outnvl); 6131 } 6132 (void) spa_history_log_nvl(spa, lognv); 6133 spa_close(spa, FTAG); 6134 } 6135 fnvlist_free(lognv); 6136 6137 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) { 6138 int smusherror = 0; 6139 if (vec->zvec_smush_outnvlist) { 6140 smusherror = nvlist_smush(outnvl, 6141 zc->zc_nvlist_dst_size); 6142 } 6143 if (smusherror == 0) 6144 puterror = put_nvlist(zc, outnvl); 6145 } 6146 6147 if (puterror != 0) 6148 error = puterror; 6149 6150 nvlist_free(outnvl); 6151 } else { 6152 error = vec->zvec_legacy_func(zc); 6153 } 6154 6155 out: 6156 nvlist_free(innvl); 6157 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 6158 if (error == 0 && rc != 0) 6159 error = SET_ERROR(EFAULT); 6160 if (error == 0 && vec->zvec_allow_log) { 6161 char *s = tsd_get(zfs_allow_log_key); 6162 if (s != NULL) 6163 strfree(s); 6164 (void) tsd_set(zfs_allow_log_key, saved_poolname); 6165 } else { 6166 if (saved_poolname != NULL) 6167 strfree(saved_poolname); 6168 } 6169 6170 kmem_free(zc, sizeof (zfs_cmd_t)); 6171 return (error); 6172 } 6173 6174 static int 6175 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 6176 { 6177 if (cmd != DDI_ATTACH) 6178 return (DDI_FAILURE); 6179 6180 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 6181 DDI_PSEUDO, 0) == DDI_FAILURE) 6182 return (DDI_FAILURE); 6183 6184 zfs_dip = dip; 6185 6186 ddi_report_dev(dip); 6187 6188 return (DDI_SUCCESS); 6189 } 6190 6191 static int 6192 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 6193 { 6194 if (spa_busy() || zfs_busy() || zvol_busy()) 6195 return (DDI_FAILURE); 6196 6197 if (cmd != DDI_DETACH) 6198 return (DDI_FAILURE); 6199 6200 zfs_dip = NULL; 6201 6202 ddi_prop_remove_all(dip); 6203 ddi_remove_minor_node(dip, NULL); 6204 6205 return (DDI_SUCCESS); 6206 } 6207 6208 /*ARGSUSED*/ 6209 static int 6210 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 6211 { 6212 switch (infocmd) { 6213 case DDI_INFO_DEVT2DEVINFO: 6214 *result = zfs_dip; 6215 return (DDI_SUCCESS); 6216 6217 case DDI_INFO_DEVT2INSTANCE: 6218 *result = (void *)0; 6219 return (DDI_SUCCESS); 6220 } 6221 6222 return (DDI_FAILURE); 6223 } 6224 6225 /* 6226 * OK, so this is a little weird. 6227 * 6228 * /dev/zfs is the control node, i.e. minor 0. 6229 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 6230 * 6231 * /dev/zfs has basically nothing to do except serve up ioctls, 6232 * so most of the standard driver entry points are in zvol.c. 6233 */ 6234 static struct cb_ops zfs_cb_ops = { 6235 zfsdev_open, /* open */ 6236 zfsdev_close, /* close */ 6237 zvol_strategy, /* strategy */ 6238 nodev, /* print */ 6239 zvol_dump, /* dump */ 6240 zvol_read, /* read */ 6241 zvol_write, /* write */ 6242 zfsdev_ioctl, /* ioctl */ 6243 nodev, /* devmap */ 6244 nodev, /* mmap */ 6245 nodev, /* segmap */ 6246 nochpoll, /* poll */ 6247 ddi_prop_op, /* prop_op */ 6248 NULL, /* streamtab */ 6249 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 6250 CB_REV, /* version */ 6251 nodev, /* async read */ 6252 nodev, /* async write */ 6253 }; 6254 6255 static struct dev_ops zfs_dev_ops = { 6256 DEVO_REV, /* version */ 6257 0, /* refcnt */ 6258 zfs_info, /* info */ 6259 nulldev, /* identify */ 6260 nulldev, /* probe */ 6261 zfs_attach, /* attach */ 6262 zfs_detach, /* detach */ 6263 nodev, /* reset */ 6264 &zfs_cb_ops, /* driver operations */ 6265 NULL, /* no bus operations */ 6266 NULL, /* power */ 6267 ddi_quiesce_not_needed, /* quiesce */ 6268 }; 6269 6270 static struct modldrv zfs_modldrv = { 6271 &mod_driverops, 6272 "ZFS storage pool", 6273 &zfs_dev_ops 6274 }; 6275 6276 static struct modlinkage modlinkage = { 6277 MODREV_1, 6278 (void *)&zfs_modlfs, 6279 (void *)&zfs_modldrv, 6280 NULL 6281 }; 6282 6283 static void 6284 zfs_allow_log_destroy(void *arg) 6285 { 6286 char *poolname = arg; 6287 strfree(poolname); 6288 } 6289 6290 int 6291 _init(void) 6292 { 6293 int error; 6294 6295 spa_init(FREAD | FWRITE); 6296 zfs_init(); 6297 zvol_init(); 6298 zfs_ioctl_init(); 6299 6300 if ((error = mod_install(&modlinkage)) != 0) { 6301 zvol_fini(); 6302 zfs_fini(); 6303 spa_fini(); 6304 return (error); 6305 } 6306 6307 tsd_create(&zfs_fsyncer_key, NULL); 6308 tsd_create(&rrw_tsd_key, rrw_tsd_destroy); 6309 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy); 6310 6311 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 6312 ASSERT(error == 0); 6313 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 6314 6315 return (0); 6316 } 6317 6318 int 6319 _fini(void) 6320 { 6321 int error; 6322 6323 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 6324 return (SET_ERROR(EBUSY)); 6325 6326 if ((error = mod_remove(&modlinkage)) != 0) 6327 return (error); 6328 6329 zvol_fini(); 6330 zfs_fini(); 6331 spa_fini(); 6332 if (zfs_nfsshare_inited) 6333 (void) ddi_modclose(nfs_mod); 6334 if (zfs_smbshare_inited) 6335 (void) ddi_modclose(smbsrv_mod); 6336 if (zfs_nfsshare_inited || zfs_smbshare_inited) 6337 (void) ddi_modclose(sharefs_mod); 6338 6339 tsd_destroy(&zfs_fsyncer_key); 6340 ldi_ident_release(zfs_li); 6341 zfs_li = NULL; 6342 mutex_destroy(&zfs_share_lock); 6343 6344 return (error); 6345 } 6346 6347 int 6348 _info(struct modinfo *modinfop) 6349 { 6350 return (mod_info(&modlinkage, modinfop)); 6351 } 6352