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