zfs_ioctl.c revision 263407
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2011-2012 Pawel Jakub Dawidek <pawel@dawidek.net>. 25 * All rights reserved. 26 * Copyright 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 27 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 28 * Copyright (c) 2012, Joyent, Inc. All rights reserved. 29 * Copyright (c) 2013 by Delphix. All rights reserved. 30 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 31 * Copyright (c) 2013 Steven Hartland. All rights reserved. 32 */ 33 34/* 35 * ZFS ioctls. 36 * 37 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage 38 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool. 39 * 40 * There are two ways that we handle ioctls: the legacy way where almost 41 * all of the logic is in the ioctl callback, and the new way where most 42 * of the marshalling is handled in the common entry point, zfsdev_ioctl(). 43 * 44 * Non-legacy ioctls should be registered by calling 45 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked 46 * from userland by lzc_ioctl(). 47 * 48 * The registration arguments are as follows: 49 * 50 * const char *name 51 * The name of the ioctl. This is used for history logging. If the 52 * ioctl returns successfully (the callback returns 0), and allow_log 53 * is true, then a history log entry will be recorded with the input & 54 * output nvlists. The log entry can be printed with "zpool history -i". 55 * 56 * zfs_ioc_t ioc 57 * The ioctl request number, which userland will pass to ioctl(2). 58 * The ioctl numbers can change from release to release, because 59 * the caller (libzfs) must be matched to the kernel. 60 * 61 * zfs_secpolicy_func_t *secpolicy 62 * This function will be called before the zfs_ioc_func_t, to 63 * determine if this operation is permitted. It should return EPERM 64 * on failure, and 0 on success. Checks include determining if the 65 * dataset is visible in this zone, and if the user has either all 66 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission 67 * to do this operation on this dataset with "zfs allow". 68 * 69 * zfs_ioc_namecheck_t namecheck 70 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool 71 * name, a dataset name, or nothing. If the name is not well-formed, 72 * the ioctl will fail and the callback will not be called. 73 * Therefore, the callback can assume that the name is well-formed 74 * (e.g. is null-terminated, doesn't have more than one '@' character, 75 * doesn't have invalid characters). 76 * 77 * zfs_ioc_poolcheck_t pool_check 78 * This specifies requirements on the pool state. If the pool does 79 * not meet them (is suspended or is readonly), the ioctl will fail 80 * and the callback will not be called. If any checks are specified 81 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME. 82 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED | 83 * POOL_CHECK_READONLY). 84 * 85 * boolean_t smush_outnvlist 86 * If smush_outnvlist is true, then the output is presumed to be a 87 * list of errors, and it will be "smushed" down to fit into the 88 * caller's buffer, by removing some entries and replacing them with a 89 * single "N_MORE_ERRORS" entry indicating how many were removed. See 90 * nvlist_smush() for details. If smush_outnvlist is false, and the 91 * outnvlist does not fit into the userland-provided buffer, then the 92 * ioctl will fail with ENOMEM. 93 * 94 * zfs_ioc_func_t *func 95 * The callback function that will perform the operation. 96 * 97 * The callback should return 0 on success, or an error number on 98 * failure. If the function fails, the userland ioctl will return -1, 99 * and errno will be set to the callback's return value. The callback 100 * will be called with the following arguments: 101 * 102 * const char *name 103 * The name of the pool or dataset to operate on, from 104 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the 105 * expected type (pool, dataset, or none). 106 * 107 * nvlist_t *innvl 108 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or 109 * NULL if no input nvlist was provided. Changes to this nvlist are 110 * ignored. If the input nvlist could not be deserialized, the 111 * ioctl will fail and the callback will not be called. 112 * 113 * nvlist_t *outnvl 114 * The output nvlist, initially empty. The callback can fill it in, 115 * and it will be returned to userland by serializing it into 116 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization 117 * fails (e.g. because the caller didn't supply a large enough 118 * buffer), then the overall ioctl will fail. See the 119 * 'smush_nvlist' argument above for additional behaviors. 120 * 121 * There are two typical uses of the output nvlist: 122 * - To return state, e.g. property values. In this case, 123 * smush_outnvlist should be false. If the buffer was not large 124 * enough, the caller will reallocate a larger buffer and try 125 * the ioctl again. 126 * 127 * - To return multiple errors from an ioctl which makes on-disk 128 * changes. In this case, smush_outnvlist should be true. 129 * Ioctls which make on-disk modifications should generally not 130 * use the outnvl if they succeed, because the caller can not 131 * distinguish between the operation failing, and 132 * deserialization failing. 133 */ 134 135#include <sys/types.h> 136#include <sys/param.h> 137#include <sys/systm.h> 138#include <sys/conf.h> 139#include <sys/kernel.h> 140#include <sys/lock.h> 141#include <sys/malloc.h> 142#include <sys/mutex.h> 143#include <sys/proc.h> 144#include <sys/errno.h> 145#include <sys/uio.h> 146#include <sys/buf.h> 147#include <sys/file.h> 148#include <sys/kmem.h> 149#include <sys/conf.h> 150#include <sys/cmn_err.h> 151#include <sys/stat.h> 152#include <sys/zfs_ioctl.h> 153#include <sys/zfs_vfsops.h> 154#include <sys/zfs_znode.h> 155#include <sys/zap.h> 156#include <sys/spa.h> 157#include <sys/spa_impl.h> 158#include <sys/vdev.h> 159#include <sys/dmu.h> 160#include <sys/dsl_dir.h> 161#include <sys/dsl_dataset.h> 162#include <sys/dsl_prop.h> 163#include <sys/dsl_deleg.h> 164#include <sys/dmu_objset.h> 165#include <sys/dmu_impl.h> 166#include <sys/dmu_tx.h> 167#include <sys/sunddi.h> 168#include <sys/policy.h> 169#include <sys/zone.h> 170#include <sys/nvpair.h> 171#include <sys/mount.h> 172#include <sys/taskqueue.h> 173#include <sys/sdt.h> 174#include <sys/varargs.h> 175#include <sys/fs/zfs.h> 176#include <sys/zfs_ctldir.h> 177#include <sys/zfs_dir.h> 178#include <sys/zfs_onexit.h> 179#include <sys/zvol.h> 180#include <sys/dsl_scan.h> 181#include <sys/dmu_objset.h> 182#include <sys/dmu_send.h> 183#include <sys/dsl_destroy.h> 184#include <sys/dsl_bookmark.h> 185#include <sys/dsl_userhold.h> 186#include <sys/zfeature.h> 187 188#include "zfs_namecheck.h" 189#include "zfs_prop.h" 190#include "zfs_deleg.h" 191#include "zfs_comutil.h" 192#include "zfs_ioctl_compat.h" 193 194CTASSERT(sizeof(zfs_cmd_t) < IOCPARM_MAX); 195 196static int snapshot_list_prefetch; 197SYSCTL_DECL(_vfs_zfs); 198TUNABLE_INT("vfs.zfs.snapshot_list_prefetch", &snapshot_list_prefetch); 199SYSCTL_INT(_vfs_zfs, OID_AUTO, snapshot_list_prefetch, CTLFLAG_RW, 200 &snapshot_list_prefetch, 0, "Prefetch data when listing snapshots"); 201 202static struct cdev *zfsdev; 203 204extern void zfs_init(void); 205extern void zfs_fini(void); 206 207uint_t zfs_fsyncer_key; 208extern uint_t rrw_tsd_key; 209static uint_t zfs_allow_log_key; 210 211typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *); 212typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *); 213typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *); 214 215typedef enum { 216 NO_NAME, 217 POOL_NAME, 218 DATASET_NAME 219} zfs_ioc_namecheck_t; 220 221typedef enum { 222 POOL_CHECK_NONE = 1 << 0, 223 POOL_CHECK_SUSPENDED = 1 << 1, 224 POOL_CHECK_READONLY = 1 << 2, 225} zfs_ioc_poolcheck_t; 226 227typedef struct zfs_ioc_vec { 228 zfs_ioc_legacy_func_t *zvec_legacy_func; 229 zfs_ioc_func_t *zvec_func; 230 zfs_secpolicy_func_t *zvec_secpolicy; 231 zfs_ioc_namecheck_t zvec_namecheck; 232 boolean_t zvec_allow_log; 233 zfs_ioc_poolcheck_t zvec_pool_check; 234 boolean_t zvec_smush_outnvlist; 235 const char *zvec_name; 236} zfs_ioc_vec_t; 237 238/* This array is indexed by zfs_userquota_prop_t */ 239static const char *userquota_perms[] = { 240 ZFS_DELEG_PERM_USERUSED, 241 ZFS_DELEG_PERM_USERQUOTA, 242 ZFS_DELEG_PERM_GROUPUSED, 243 ZFS_DELEG_PERM_GROUPQUOTA, 244}; 245 246static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc); 247static int zfs_check_settable(const char *name, nvpair_t *property, 248 cred_t *cr); 249static int zfs_check_clearable(char *dataset, nvlist_t *props, 250 nvlist_t **errors); 251static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *, 252 boolean_t *); 253int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *); 254static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp); 255 256static void zfsdev_close(void *data); 257 258static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature); 259 260/* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ 261void 262__dprintf(const char *file, const char *func, int line, const char *fmt, ...) 263{ 264 const char *newfile; 265 char buf[512]; 266 va_list adx; 267 268 /* 269 * Get rid of annoying "../common/" prefix to filename. 270 */ 271 newfile = strrchr(file, '/'); 272 if (newfile != NULL) { 273 newfile = newfile + 1; /* Get rid of leading / */ 274 } else { 275 newfile = file; 276 } 277 278 va_start(adx, fmt); 279 (void) vsnprintf(buf, sizeof (buf), fmt, adx); 280 va_end(adx); 281 282 /* 283 * To get this data, use the zfs-dprintf probe as so: 284 * dtrace -q -n 'zfs-dprintf \ 285 * /stringof(arg0) == "dbuf.c"/ \ 286 * {printf("%s: %s", stringof(arg1), stringof(arg3))}' 287 * arg0 = file name 288 * arg1 = function name 289 * arg2 = line number 290 * arg3 = message 291 */ 292 DTRACE_PROBE4(zfs__dprintf, 293 char *, newfile, char *, func, int, line, char *, buf); 294} 295 296static void 297history_str_free(char *buf) 298{ 299 kmem_free(buf, HIS_MAX_RECORD_LEN); 300} 301 302static char * 303history_str_get(zfs_cmd_t *zc) 304{ 305 char *buf; 306 307 if (zc->zc_history == 0) 308 return (NULL); 309 310 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); 311 if (copyinstr((void *)(uintptr_t)zc->zc_history, 312 buf, HIS_MAX_RECORD_LEN, NULL) != 0) { 313 history_str_free(buf); 314 return (NULL); 315 } 316 317 buf[HIS_MAX_RECORD_LEN -1] = '\0'; 318 319 return (buf); 320} 321 322/* 323 * Check to see if the named dataset is currently defined as bootable 324 */ 325static boolean_t 326zfs_is_bootfs(const char *name) 327{ 328 objset_t *os; 329 330 if (dmu_objset_hold(name, FTAG, &os) == 0) { 331 boolean_t ret; 332 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os))); 333 dmu_objset_rele(os, FTAG); 334 return (ret); 335 } 336 return (B_FALSE); 337} 338 339/* 340 * Return non-zero if the spa version is less than requested version. 341 */ 342static int 343zfs_earlier_version(const char *name, int version) 344{ 345 spa_t *spa; 346 347 if (spa_open(name, &spa, FTAG) == 0) { 348 if (spa_version(spa) < version) { 349 spa_close(spa, FTAG); 350 return (1); 351 } 352 spa_close(spa, FTAG); 353 } 354 return (0); 355} 356 357/* 358 * Return TRUE if the ZPL version is less than requested version. 359 */ 360static boolean_t 361zpl_earlier_version(const char *name, int version) 362{ 363 objset_t *os; 364 boolean_t rc = B_TRUE; 365 366 if (dmu_objset_hold(name, FTAG, &os) == 0) { 367 uint64_t zplversion; 368 369 if (dmu_objset_type(os) != DMU_OST_ZFS) { 370 dmu_objset_rele(os, FTAG); 371 return (B_TRUE); 372 } 373 /* XXX reading from non-owned objset */ 374 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0) 375 rc = zplversion < version; 376 dmu_objset_rele(os, FTAG); 377 } 378 return (rc); 379} 380 381static void 382zfs_log_history(zfs_cmd_t *zc) 383{ 384 spa_t *spa; 385 char *buf; 386 387 if ((buf = history_str_get(zc)) == NULL) 388 return; 389 390 if (spa_open(zc->zc_name, &spa, FTAG) == 0) { 391 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) 392 (void) spa_history_log(spa, buf); 393 spa_close(spa, FTAG); 394 } 395 history_str_free(buf); 396} 397 398/* 399 * Policy for top-level read operations (list pools). Requires no privileges, 400 * and can be used in the local zone, as there is no associated dataset. 401 */ 402/* ARGSUSED */ 403static int 404zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 405{ 406 return (0); 407} 408 409/* 410 * Policy for dataset read operations (list children, get statistics). Requires 411 * no privileges, but must be visible in the local zone. 412 */ 413/* ARGSUSED */ 414static int 415zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 416{ 417 if (INGLOBALZONE(curthread) || 418 zone_dataset_visible(zc->zc_name, NULL)) 419 return (0); 420 421 return (SET_ERROR(ENOENT)); 422} 423 424static int 425zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr) 426{ 427 int writable = 1; 428 429 /* 430 * The dataset must be visible by this zone -- check this first 431 * so they don't see EPERM on something they shouldn't know about. 432 */ 433 if (!INGLOBALZONE(curthread) && 434 !zone_dataset_visible(dataset, &writable)) 435 return (SET_ERROR(ENOENT)); 436 437 if (INGLOBALZONE(curthread)) { 438 /* 439 * If the fs is zoned, only root can access it from the 440 * global zone. 441 */ 442 if (secpolicy_zfs(cr) && zoned) 443 return (SET_ERROR(EPERM)); 444 } else { 445 /* 446 * If we are in a local zone, the 'zoned' property must be set. 447 */ 448 if (!zoned) 449 return (SET_ERROR(EPERM)); 450 451 /* must be writable by this zone */ 452 if (!writable) 453 return (SET_ERROR(EPERM)); 454 } 455 return (0); 456} 457 458static int 459zfs_dozonecheck(const char *dataset, cred_t *cr) 460{ 461 uint64_t zoned; 462 463 if (dsl_prop_get_integer(dataset, "jailed", &zoned, NULL)) 464 return (SET_ERROR(ENOENT)); 465 466 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 467} 468 469static int 470zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr) 471{ 472 uint64_t zoned; 473 474 if (dsl_prop_get_int_ds(ds, "jailed", &zoned)) 475 return (SET_ERROR(ENOENT)); 476 477 return (zfs_dozonecheck_impl(dataset, zoned, cr)); 478} 479 480static int 481zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds, 482 const char *perm, cred_t *cr) 483{ 484 int error; 485 486 error = zfs_dozonecheck_ds(name, ds, cr); 487 if (error == 0) { 488 error = secpolicy_zfs(cr); 489 if (error != 0) 490 error = dsl_deleg_access_impl(ds, perm, cr); 491 } 492 return (error); 493} 494 495static int 496zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) 497{ 498 int error; 499 dsl_dataset_t *ds; 500 dsl_pool_t *dp; 501 502 error = dsl_pool_hold(name, FTAG, &dp); 503 if (error != 0) 504 return (error); 505 506 error = dsl_dataset_hold(dp, name, FTAG, &ds); 507 if (error != 0) { 508 dsl_pool_rele(dp, FTAG); 509 return (error); 510 } 511 512 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr); 513 514 dsl_dataset_rele(ds, FTAG); 515 dsl_pool_rele(dp, FTAG); 516 return (error); 517} 518 519#ifdef SECLABEL 520/* 521 * Policy for setting the security label property. 522 * 523 * Returns 0 for success, non-zero for access and other errors. 524 */ 525static int 526zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr) 527{ 528 char ds_hexsl[MAXNAMELEN]; 529 bslabel_t ds_sl, new_sl; 530 boolean_t new_default = FALSE; 531 uint64_t zoned; 532 int needed_priv = -1; 533 int error; 534 535 /* First get the existing dataset label. */ 536 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 537 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 538 if (error != 0) 539 return (SET_ERROR(EPERM)); 540 541 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 542 new_default = TRUE; 543 544 /* The label must be translatable */ 545 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0)) 546 return (SET_ERROR(EINVAL)); 547 548 /* 549 * In a non-global zone, disallow attempts to set a label that 550 * doesn't match that of the zone; otherwise no other checks 551 * are needed. 552 */ 553 if (!INGLOBALZONE(curproc)) { 554 if (new_default || !blequal(&new_sl, CR_SL(CRED()))) 555 return (SET_ERROR(EPERM)); 556 return (0); 557 } 558 559 /* 560 * For global-zone datasets (i.e., those whose zoned property is 561 * "off", verify that the specified new label is valid for the 562 * global zone. 563 */ 564 if (dsl_prop_get_integer(name, 565 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 566 return (SET_ERROR(EPERM)); 567 if (!zoned) { 568 if (zfs_check_global_label(name, strval) != 0) 569 return (SET_ERROR(EPERM)); 570 } 571 572 /* 573 * If the existing dataset label is nondefault, check if the 574 * dataset is mounted (label cannot be changed while mounted). 575 * Get the zfsvfs; if there isn't one, then the dataset isn't 576 * mounted (or isn't a dataset, doesn't exist, ...). 577 */ 578 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) { 579 objset_t *os; 580 static char *setsl_tag = "setsl_tag"; 581 582 /* 583 * Try to own the dataset; abort if there is any error, 584 * (e.g., already mounted, in use, or other error). 585 */ 586 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE, 587 setsl_tag, &os); 588 if (error != 0) 589 return (SET_ERROR(EPERM)); 590 591 dmu_objset_disown(os, setsl_tag); 592 593 if (new_default) { 594 needed_priv = PRIV_FILE_DOWNGRADE_SL; 595 goto out_check; 596 } 597 598 if (hexstr_to_label(strval, &new_sl) != 0) 599 return (SET_ERROR(EPERM)); 600 601 if (blstrictdom(&ds_sl, &new_sl)) 602 needed_priv = PRIV_FILE_DOWNGRADE_SL; 603 else if (blstrictdom(&new_sl, &ds_sl)) 604 needed_priv = PRIV_FILE_UPGRADE_SL; 605 } else { 606 /* dataset currently has a default label */ 607 if (!new_default) 608 needed_priv = PRIV_FILE_UPGRADE_SL; 609 } 610 611out_check: 612 if (needed_priv != -1) 613 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL)); 614 return (0); 615} 616#endif /* SECLABEL */ 617 618static int 619zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval, 620 cred_t *cr) 621{ 622 char *strval; 623 624 /* 625 * Check permissions for special properties. 626 */ 627 switch (prop) { 628 case ZFS_PROP_ZONED: 629 /* 630 * Disallow setting of 'zoned' from within a local zone. 631 */ 632 if (!INGLOBALZONE(curthread)) 633 return (SET_ERROR(EPERM)); 634 break; 635 636 case ZFS_PROP_QUOTA: 637 if (!INGLOBALZONE(curthread)) { 638 uint64_t zoned; 639 char setpoint[MAXNAMELEN]; 640 /* 641 * Unprivileged users are allowed to modify the 642 * quota on things *under* (ie. contained by) 643 * the thing they own. 644 */ 645 if (dsl_prop_get_integer(dsname, "jailed", &zoned, 646 setpoint)) 647 return (SET_ERROR(EPERM)); 648 if (!zoned || strlen(dsname) <= strlen(setpoint)) 649 return (SET_ERROR(EPERM)); 650 } 651 break; 652 653 case ZFS_PROP_MLSLABEL: 654#ifdef SECLABEL 655 if (!is_system_labeled()) 656 return (SET_ERROR(EPERM)); 657 658 if (nvpair_value_string(propval, &strval) == 0) { 659 int err; 660 661 err = zfs_set_slabel_policy(dsname, strval, CRED()); 662 if (err != 0) 663 return (err); 664 } 665#else 666 return (EOPNOTSUPP); 667#endif 668 break; 669 } 670 671 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr)); 672} 673 674/* ARGSUSED */ 675static int 676zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 677{ 678 int error; 679 680 error = zfs_dozonecheck(zc->zc_name, cr); 681 if (error != 0) 682 return (error); 683 684 /* 685 * permission to set permissions will be evaluated later in 686 * dsl_deleg_can_allow() 687 */ 688 return (0); 689} 690 691/* ARGSUSED */ 692static int 693zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 694{ 695 return (zfs_secpolicy_write_perms(zc->zc_name, 696 ZFS_DELEG_PERM_ROLLBACK, cr)); 697} 698 699/* ARGSUSED */ 700static int 701zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 702{ 703 dsl_pool_t *dp; 704 dsl_dataset_t *ds; 705 char *cp; 706 int error; 707 708 /* 709 * Generate the current snapshot name from the given objsetid, then 710 * use that name for the secpolicy/zone checks. 711 */ 712 cp = strchr(zc->zc_name, '@'); 713 if (cp == NULL) 714 return (SET_ERROR(EINVAL)); 715 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 716 if (error != 0) 717 return (error); 718 719 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); 720 if (error != 0) { 721 dsl_pool_rele(dp, FTAG); 722 return (error); 723 } 724 725 dsl_dataset_name(ds, zc->zc_name); 726 727 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds, 728 ZFS_DELEG_PERM_SEND, cr); 729 dsl_dataset_rele(ds, FTAG); 730 dsl_pool_rele(dp, FTAG); 731 732 return (error); 733} 734 735/* ARGSUSED */ 736static int 737zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 738{ 739 return (zfs_secpolicy_write_perms(zc->zc_name, 740 ZFS_DELEG_PERM_SEND, cr)); 741} 742 743/* ARGSUSED */ 744static int 745zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 746{ 747 vnode_t *vp; 748 int error; 749 750 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 751 NO_FOLLOW, NULL, &vp)) != 0) 752 return (error); 753 754 /* Now make sure mntpnt and dataset are ZFS */ 755 756 if (strcmp(vp->v_vfsp->mnt_stat.f_fstypename, "zfs") != 0 || 757 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 758 zc->zc_name) != 0)) { 759 VN_RELE(vp); 760 return (SET_ERROR(EPERM)); 761 } 762 763 VN_RELE(vp); 764 return (dsl_deleg_access(zc->zc_name, 765 ZFS_DELEG_PERM_SHARE, cr)); 766} 767 768int 769zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 770{ 771 if (!INGLOBALZONE(curthread)) 772 return (SET_ERROR(EPERM)); 773 774 if (secpolicy_nfs(cr) == 0) { 775 return (0); 776 } else { 777 return (zfs_secpolicy_deleg_share(zc, innvl, cr)); 778 } 779} 780 781int 782zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 783{ 784 if (!INGLOBALZONE(curthread)) 785 return (SET_ERROR(EPERM)); 786 787 if (secpolicy_smb(cr) == 0) { 788 return (0); 789 } else { 790 return (zfs_secpolicy_deleg_share(zc, innvl, cr)); 791 } 792} 793 794static int 795zfs_get_parent(const char *datasetname, char *parent, int parentsize) 796{ 797 char *cp; 798 799 /* 800 * Remove the @bla or /bla from the end of the name to get the parent. 801 */ 802 (void) strncpy(parent, datasetname, parentsize); 803 cp = strrchr(parent, '@'); 804 if (cp != NULL) { 805 cp[0] = '\0'; 806 } else { 807 cp = strrchr(parent, '/'); 808 if (cp == NULL) 809 return (SET_ERROR(ENOENT)); 810 cp[0] = '\0'; 811 } 812 813 return (0); 814} 815 816int 817zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 818{ 819 int error; 820 821 if ((error = zfs_secpolicy_write_perms(name, 822 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 823 return (error); 824 825 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); 826} 827 828/* ARGSUSED */ 829static int 830zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 831{ 832 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); 833} 834 835/* 836 * Destroying snapshots with delegated permissions requires 837 * descendant mount and destroy permissions. 838 */ 839/* ARGSUSED */ 840static int 841zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 842{ 843 nvlist_t *snaps; 844 nvpair_t *pair, *nextpair; 845 int error = 0; 846 847 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 848 return (SET_ERROR(EINVAL)); 849 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 850 pair = nextpair) { 851 nextpair = nvlist_next_nvpair(snaps, pair); 852 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr); 853 if (error == ENOENT) { 854 /* 855 * Ignore any snapshots that don't exist (we consider 856 * them "already destroyed"). Remove the name from the 857 * nvl here in case the snapshot is created between 858 * now and when we try to destroy it (in which case 859 * we don't want to destroy it since we haven't 860 * checked for permission). 861 */ 862 fnvlist_remove_nvpair(snaps, pair); 863 error = 0; 864 } 865 if (error != 0) 866 break; 867 } 868 869 return (error); 870} 871 872int 873zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 874{ 875 char parentname[MAXNAMELEN]; 876 int error; 877 878 if ((error = zfs_secpolicy_write_perms(from, 879 ZFS_DELEG_PERM_RENAME, cr)) != 0) 880 return (error); 881 882 if ((error = zfs_secpolicy_write_perms(from, 883 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 884 return (error); 885 886 if ((error = zfs_get_parent(to, parentname, 887 sizeof (parentname))) != 0) 888 return (error); 889 890 if ((error = zfs_secpolicy_write_perms(parentname, 891 ZFS_DELEG_PERM_CREATE, cr)) != 0) 892 return (error); 893 894 if ((error = zfs_secpolicy_write_perms(parentname, 895 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 896 return (error); 897 898 return (error); 899} 900 901/* ARGSUSED */ 902static int 903zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 904{ 905 char *at = NULL; 906 int error; 907 908 if ((zc->zc_cookie & 1) != 0) { 909 /* 910 * This is recursive rename, so the starting snapshot might 911 * not exist. Check file system or volume permission instead. 912 */ 913 at = strchr(zc->zc_name, '@'); 914 if (at == NULL) 915 return (EINVAL); 916 *at = '\0'; 917 } 918 919 error = zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr); 920 921 if (at != NULL) 922 *at = '@'; 923 924 return (error); 925} 926 927/* ARGSUSED */ 928static int 929zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 930{ 931 dsl_pool_t *dp; 932 dsl_dataset_t *clone; 933 int error; 934 935 error = zfs_secpolicy_write_perms(zc->zc_name, 936 ZFS_DELEG_PERM_PROMOTE, cr); 937 if (error != 0) 938 return (error); 939 940 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 941 if (error != 0) 942 return (error); 943 944 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone); 945 946 if (error == 0) { 947 char parentname[MAXNAMELEN]; 948 dsl_dataset_t *origin = NULL; 949 dsl_dir_t *dd; 950 dd = clone->ds_dir; 951 952 error = dsl_dataset_hold_obj(dd->dd_pool, 953 dd->dd_phys->dd_origin_obj, FTAG, &origin); 954 if (error != 0) { 955 dsl_dataset_rele(clone, FTAG); 956 dsl_pool_rele(dp, FTAG); 957 return (error); 958 } 959 960 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone, 961 ZFS_DELEG_PERM_MOUNT, cr); 962 963 dsl_dataset_name(origin, parentname); 964 if (error == 0) { 965 error = zfs_secpolicy_write_perms_ds(parentname, origin, 966 ZFS_DELEG_PERM_PROMOTE, cr); 967 } 968 dsl_dataset_rele(clone, FTAG); 969 dsl_dataset_rele(origin, FTAG); 970 } 971 dsl_pool_rele(dp, FTAG); 972 return (error); 973} 974 975/* ARGSUSED */ 976static int 977zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 978{ 979 int error; 980 981 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 982 ZFS_DELEG_PERM_RECEIVE, cr)) != 0) 983 return (error); 984 985 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 986 ZFS_DELEG_PERM_MOUNT, cr)) != 0) 987 return (error); 988 989 return (zfs_secpolicy_write_perms(zc->zc_name, 990 ZFS_DELEG_PERM_CREATE, cr)); 991} 992 993int 994zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 995{ 996 return (zfs_secpolicy_write_perms(name, 997 ZFS_DELEG_PERM_SNAPSHOT, cr)); 998} 999 1000/* 1001 * Check for permission to create each snapshot in the nvlist. 1002 */ 1003/* ARGSUSED */ 1004static int 1005zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1006{ 1007 nvlist_t *snaps; 1008 int error; 1009 nvpair_t *pair; 1010 1011 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 1012 return (SET_ERROR(EINVAL)); 1013 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 1014 pair = nvlist_next_nvpair(snaps, pair)) { 1015 char *name = nvpair_name(pair); 1016 char *atp = strchr(name, '@'); 1017 1018 if (atp == NULL) { 1019 error = SET_ERROR(EINVAL); 1020 break; 1021 } 1022 *atp = '\0'; 1023 error = zfs_secpolicy_snapshot_perms(name, cr); 1024 *atp = '@'; 1025 if (error != 0) 1026 break; 1027 } 1028 return (error); 1029} 1030 1031/* 1032 * Check for permission to create each snapshot in the nvlist. 1033 */ 1034/* ARGSUSED */ 1035static int 1036zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1037{ 1038 int error = 0; 1039 1040 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 1041 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 1042 char *name = nvpair_name(pair); 1043 char *hashp = strchr(name, '#'); 1044 1045 if (hashp == NULL) { 1046 error = SET_ERROR(EINVAL); 1047 break; 1048 } 1049 *hashp = '\0'; 1050 error = zfs_secpolicy_write_perms(name, 1051 ZFS_DELEG_PERM_BOOKMARK, cr); 1052 *hashp = '#'; 1053 if (error != 0) 1054 break; 1055 } 1056 return (error); 1057} 1058 1059/* ARGSUSED */ 1060static int 1061zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1062{ 1063 nvpair_t *pair, *nextpair; 1064 int error = 0; 1065 1066 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; 1067 pair = nextpair) { 1068 char *name = nvpair_name(pair); 1069 char *hashp = strchr(name, '#'); 1070 nextpair = nvlist_next_nvpair(innvl, pair); 1071 1072 if (hashp == NULL) { 1073 error = SET_ERROR(EINVAL); 1074 break; 1075 } 1076 1077 *hashp = '\0'; 1078 error = zfs_secpolicy_write_perms(name, 1079 ZFS_DELEG_PERM_DESTROY, cr); 1080 *hashp = '#'; 1081 if (error == ENOENT) { 1082 /* 1083 * Ignore any filesystems that don't exist (we consider 1084 * their bookmarks "already destroyed"). Remove 1085 * the name from the nvl here in case the filesystem 1086 * is created between now and when we try to destroy 1087 * the bookmark (in which case we don't want to 1088 * destroy it since we haven't checked for permission). 1089 */ 1090 fnvlist_remove_nvpair(innvl, pair); 1091 error = 0; 1092 } 1093 if (error != 0) 1094 break; 1095 } 1096 1097 return (error); 1098} 1099 1100/* ARGSUSED */ 1101static int 1102zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1103{ 1104 /* 1105 * Even root must have a proper TSD so that we know what pool 1106 * to log to. 1107 */ 1108 if (tsd_get(zfs_allow_log_key) == NULL) 1109 return (SET_ERROR(EPERM)); 1110 return (0); 1111} 1112 1113static int 1114zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1115{ 1116 char parentname[MAXNAMELEN]; 1117 int error; 1118 char *origin; 1119 1120 if ((error = zfs_get_parent(zc->zc_name, parentname, 1121 sizeof (parentname))) != 0) 1122 return (error); 1123 1124 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 && 1125 (error = zfs_secpolicy_write_perms(origin, 1126 ZFS_DELEG_PERM_CLONE, cr)) != 0) 1127 return (error); 1128 1129 if ((error = zfs_secpolicy_write_perms(parentname, 1130 ZFS_DELEG_PERM_CREATE, cr)) != 0) 1131 return (error); 1132 1133 return (zfs_secpolicy_write_perms(parentname, 1134 ZFS_DELEG_PERM_MOUNT, cr)); 1135} 1136 1137/* 1138 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires 1139 * SYS_CONFIG privilege, which is not available in a local zone. 1140 */ 1141/* ARGSUSED */ 1142static int 1143zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1144{ 1145 if (secpolicy_sys_config(cr, B_FALSE) != 0) 1146 return (SET_ERROR(EPERM)); 1147 1148 return (0); 1149} 1150 1151/* 1152 * Policy for object to name lookups. 1153 */ 1154/* ARGSUSED */ 1155static int 1156zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1157{ 1158 int error; 1159 1160 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0) 1161 return (0); 1162 1163 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr); 1164 return (error); 1165} 1166 1167/* 1168 * Policy for fault injection. Requires all privileges. 1169 */ 1170/* ARGSUSED */ 1171static int 1172zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1173{ 1174 return (secpolicy_zinject(cr)); 1175} 1176 1177/* ARGSUSED */ 1178static int 1179zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1180{ 1181 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); 1182 1183 if (prop == ZPROP_INVAL) { 1184 if (!zfs_prop_user(zc->zc_value)) 1185 return (SET_ERROR(EINVAL)); 1186 return (zfs_secpolicy_write_perms(zc->zc_name, 1187 ZFS_DELEG_PERM_USERPROP, cr)); 1188 } else { 1189 return (zfs_secpolicy_setprop(zc->zc_name, prop, 1190 NULL, cr)); 1191 } 1192} 1193 1194static int 1195zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1196{ 1197 int err = zfs_secpolicy_read(zc, innvl, cr); 1198 if (err) 1199 return (err); 1200 1201 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 1202 return (SET_ERROR(EINVAL)); 1203 1204 if (zc->zc_value[0] == 0) { 1205 /* 1206 * They are asking about a posix uid/gid. If it's 1207 * themself, allow it. 1208 */ 1209 if (zc->zc_objset_type == ZFS_PROP_USERUSED || 1210 zc->zc_objset_type == ZFS_PROP_USERQUOTA) { 1211 if (zc->zc_guid == crgetuid(cr)) 1212 return (0); 1213 } else { 1214 if (groupmember(zc->zc_guid, cr)) 1215 return (0); 1216 } 1217 } 1218 1219 return (zfs_secpolicy_write_perms(zc->zc_name, 1220 userquota_perms[zc->zc_objset_type], cr)); 1221} 1222 1223static int 1224zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1225{ 1226 int err = zfs_secpolicy_read(zc, innvl, cr); 1227 if (err) 1228 return (err); 1229 1230 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 1231 return (SET_ERROR(EINVAL)); 1232 1233 return (zfs_secpolicy_write_perms(zc->zc_name, 1234 userquota_perms[zc->zc_objset_type], cr)); 1235} 1236 1237/* ARGSUSED */ 1238static int 1239zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1240{ 1241 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, 1242 NULL, cr)); 1243} 1244 1245/* ARGSUSED */ 1246static int 1247zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1248{ 1249 nvpair_t *pair; 1250 nvlist_t *holds; 1251 int error; 1252 1253 error = nvlist_lookup_nvlist(innvl, "holds", &holds); 1254 if (error != 0) 1255 return (SET_ERROR(EINVAL)); 1256 1257 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; 1258 pair = nvlist_next_nvpair(holds, pair)) { 1259 char fsname[MAXNAMELEN]; 1260 error = dmu_fsname(nvpair_name(pair), fsname); 1261 if (error != 0) 1262 return (error); 1263 error = zfs_secpolicy_write_perms(fsname, 1264 ZFS_DELEG_PERM_HOLD, cr); 1265 if (error != 0) 1266 return (error); 1267 } 1268 return (0); 1269} 1270 1271/* ARGSUSED */ 1272static int 1273zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1274{ 1275 nvpair_t *pair; 1276 int error; 1277 1278 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; 1279 pair = nvlist_next_nvpair(innvl, pair)) { 1280 char fsname[MAXNAMELEN]; 1281 error = dmu_fsname(nvpair_name(pair), fsname); 1282 if (error != 0) 1283 return (error); 1284 error = zfs_secpolicy_write_perms(fsname, 1285 ZFS_DELEG_PERM_RELEASE, cr); 1286 if (error != 0) 1287 return (error); 1288 } 1289 return (0); 1290} 1291 1292/* 1293 * Policy for allowing temporary snapshots to be taken or released 1294 */ 1295static int 1296zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) 1297{ 1298 /* 1299 * A temporary snapshot is the same as a snapshot, 1300 * hold, destroy and release all rolled into one. 1301 * Delegated diff alone is sufficient that we allow this. 1302 */ 1303 int error; 1304 1305 if ((error = zfs_secpolicy_write_perms(zc->zc_name, 1306 ZFS_DELEG_PERM_DIFF, cr)) == 0) 1307 return (0); 1308 1309 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr); 1310 if (error == 0) 1311 error = zfs_secpolicy_hold(zc, innvl, cr); 1312 if (error == 0) 1313 error = zfs_secpolicy_release(zc, innvl, cr); 1314 if (error == 0) 1315 error = zfs_secpolicy_destroy(zc, innvl, cr); 1316 return (error); 1317} 1318 1319/* 1320 * Returns the nvlist as specified by the user in the zfs_cmd_t. 1321 */ 1322static int 1323get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) 1324{ 1325 char *packed; 1326 int error; 1327 nvlist_t *list = NULL; 1328 1329 /* 1330 * Read in and unpack the user-supplied nvlist. 1331 */ 1332 if (size == 0) 1333 return (SET_ERROR(EINVAL)); 1334 1335 packed = kmem_alloc(size, KM_SLEEP); 1336 1337 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, 1338 iflag)) != 0) { 1339 kmem_free(packed, size); 1340 return (error); 1341 } 1342 1343 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { 1344 kmem_free(packed, size); 1345 return (error); 1346 } 1347 1348 kmem_free(packed, size); 1349 1350 *nvp = list; 1351 return (0); 1352} 1353 1354/* 1355 * Reduce the size of this nvlist until it can be serialized in 'max' bytes. 1356 * Entries will be removed from the end of the nvlist, and one int32 entry 1357 * named "N_MORE_ERRORS" will be added indicating how many entries were 1358 * removed. 1359 */ 1360static int 1361nvlist_smush(nvlist_t *errors, size_t max) 1362{ 1363 size_t size; 1364 1365 size = fnvlist_size(errors); 1366 1367 if (size > max) { 1368 nvpair_t *more_errors; 1369 int n = 0; 1370 1371 if (max < 1024) 1372 return (SET_ERROR(ENOMEM)); 1373 1374 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0); 1375 more_errors = nvlist_prev_nvpair(errors, NULL); 1376 1377 do { 1378 nvpair_t *pair = nvlist_prev_nvpair(errors, 1379 more_errors); 1380 fnvlist_remove_nvpair(errors, pair); 1381 n++; 1382 size = fnvlist_size(errors); 1383 } while (size > max); 1384 1385 fnvlist_remove_nvpair(errors, more_errors); 1386 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n); 1387 ASSERT3U(fnvlist_size(errors), <=, max); 1388 } 1389 1390 return (0); 1391} 1392 1393static int 1394put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) 1395{ 1396 char *packed = NULL; 1397 int error = 0; 1398 size_t size; 1399 1400 size = fnvlist_size(nvl); 1401 1402 if (size > zc->zc_nvlist_dst_size) { 1403 /* 1404 * Solaris returns ENOMEM here, because even if an error is 1405 * returned from an ioctl(2), new zc_nvlist_dst_size will be 1406 * passed to the userland. This is not the case for FreeBSD. 1407 * We need to return 0, so the kernel will copy the 1408 * zc_nvlist_dst_size back and the userland can discover that a 1409 * bigger buffer is needed. 1410 */ 1411 error = 0; 1412 } else { 1413 packed = fnvlist_pack(nvl, &size); 1414 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, 1415 size, zc->zc_iflags) != 0) 1416 error = SET_ERROR(EFAULT); 1417 fnvlist_pack_free(packed, size); 1418 } 1419 1420 zc->zc_nvlist_dst_size = size; 1421 zc->zc_nvlist_dst_filled = B_TRUE; 1422 return (error); 1423} 1424 1425static int 1426getzfsvfs(const char *dsname, zfsvfs_t **zfvp) 1427{ 1428 objset_t *os; 1429 int error; 1430 1431 error = dmu_objset_hold(dsname, FTAG, &os); 1432 if (error != 0) 1433 return (error); 1434 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1435 dmu_objset_rele(os, FTAG); 1436 return (SET_ERROR(EINVAL)); 1437 } 1438 1439 mutex_enter(&os->os_user_ptr_lock); 1440 *zfvp = dmu_objset_get_user(os); 1441 if (*zfvp) { 1442 VFS_HOLD((*zfvp)->z_vfs); 1443 } else { 1444 error = SET_ERROR(ESRCH); 1445 } 1446 mutex_exit(&os->os_user_ptr_lock); 1447 dmu_objset_rele(os, FTAG); 1448 return (error); 1449} 1450 1451/* 1452 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which 1453 * case its z_vfs will be NULL, and it will be opened as the owner. 1454 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER, 1455 * which prevents all vnode ops from running. 1456 */ 1457static int 1458zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer) 1459{ 1460 int error = 0; 1461 1462 if (getzfsvfs(name, zfvp) != 0) 1463 error = zfsvfs_create(name, zfvp); 1464 if (error == 0) { 1465 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER : 1466 RW_READER, tag); 1467 if ((*zfvp)->z_unmounted) { 1468 /* 1469 * XXX we could probably try again, since the unmounting 1470 * thread should be just about to disassociate the 1471 * objset from the zfsvfs. 1472 */ 1473 rrw_exit(&(*zfvp)->z_teardown_lock, tag); 1474 return (SET_ERROR(EBUSY)); 1475 } 1476 } 1477 return (error); 1478} 1479 1480static void 1481zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) 1482{ 1483 rrw_exit(&zfsvfs->z_teardown_lock, tag); 1484 1485 if (zfsvfs->z_vfs) { 1486 VFS_RELE(zfsvfs->z_vfs); 1487 } else { 1488 dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1489 zfsvfs_free(zfsvfs); 1490 } 1491} 1492 1493static int 1494zfs_ioc_pool_create(zfs_cmd_t *zc) 1495{ 1496 int error; 1497 nvlist_t *config, *props = NULL; 1498 nvlist_t *rootprops = NULL; 1499 nvlist_t *zplprops = NULL; 1500 1501 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1502 zc->zc_iflags, &config)) 1503 return (error); 1504 1505 if (zc->zc_nvlist_src_size != 0 && (error = 1506 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1507 zc->zc_iflags, &props))) { 1508 nvlist_free(config); 1509 return (error); 1510 } 1511 1512 if (props) { 1513 nvlist_t *nvl = NULL; 1514 uint64_t version = SPA_VERSION; 1515 1516 (void) nvlist_lookup_uint64(props, 1517 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); 1518 if (!SPA_VERSION_IS_SUPPORTED(version)) { 1519 error = SET_ERROR(EINVAL); 1520 goto pool_props_bad; 1521 } 1522 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); 1523 if (nvl) { 1524 error = nvlist_dup(nvl, &rootprops, KM_SLEEP); 1525 if (error != 0) { 1526 nvlist_free(config); 1527 nvlist_free(props); 1528 return (error); 1529 } 1530 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); 1531 } 1532 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1533 error = zfs_fill_zplprops_root(version, rootprops, 1534 zplprops, NULL); 1535 if (error != 0) 1536 goto pool_props_bad; 1537 } 1538 1539 error = spa_create(zc->zc_name, config, props, zplprops); 1540 1541 /* 1542 * Set the remaining root properties 1543 */ 1544 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, 1545 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) 1546 (void) spa_destroy(zc->zc_name); 1547 1548pool_props_bad: 1549 nvlist_free(rootprops); 1550 nvlist_free(zplprops); 1551 nvlist_free(config); 1552 nvlist_free(props); 1553 1554 return (error); 1555} 1556 1557static int 1558zfs_ioc_pool_destroy(zfs_cmd_t *zc) 1559{ 1560 int error; 1561 zfs_log_history(zc); 1562 error = spa_destroy(zc->zc_name); 1563 if (error == 0) 1564 zvol_remove_minors(zc->zc_name); 1565 return (error); 1566} 1567 1568static int 1569zfs_ioc_pool_import(zfs_cmd_t *zc) 1570{ 1571 nvlist_t *config, *props = NULL; 1572 uint64_t guid; 1573 int error; 1574 1575 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1576 zc->zc_iflags, &config)) != 0) 1577 return (error); 1578 1579 if (zc->zc_nvlist_src_size != 0 && (error = 1580 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 1581 zc->zc_iflags, &props))) { 1582 nvlist_free(config); 1583 return (error); 1584 } 1585 1586 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || 1587 guid != zc->zc_guid) 1588 error = SET_ERROR(EINVAL); 1589 else 1590 error = spa_import(zc->zc_name, config, props, zc->zc_cookie); 1591 1592 if (zc->zc_nvlist_dst != 0) { 1593 int err; 1594 1595 if ((err = put_nvlist(zc, config)) != 0) 1596 error = err; 1597 } 1598 1599 nvlist_free(config); 1600 1601 if (props) 1602 nvlist_free(props); 1603 1604 return (error); 1605} 1606 1607static int 1608zfs_ioc_pool_export(zfs_cmd_t *zc) 1609{ 1610 int error; 1611 boolean_t force = (boolean_t)zc->zc_cookie; 1612 boolean_t hardforce = (boolean_t)zc->zc_guid; 1613 1614 zfs_log_history(zc); 1615 error = spa_export(zc->zc_name, NULL, force, hardforce); 1616 if (error == 0) 1617 zvol_remove_minors(zc->zc_name); 1618 return (error); 1619} 1620 1621static int 1622zfs_ioc_pool_configs(zfs_cmd_t *zc) 1623{ 1624 nvlist_t *configs; 1625 int error; 1626 1627 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) 1628 return (SET_ERROR(EEXIST)); 1629 1630 error = put_nvlist(zc, configs); 1631 1632 nvlist_free(configs); 1633 1634 return (error); 1635} 1636 1637/* 1638 * inputs: 1639 * zc_name name of the pool 1640 * 1641 * outputs: 1642 * zc_cookie real errno 1643 * zc_nvlist_dst config nvlist 1644 * zc_nvlist_dst_size size of config nvlist 1645 */ 1646static int 1647zfs_ioc_pool_stats(zfs_cmd_t *zc) 1648{ 1649 nvlist_t *config; 1650 int error; 1651 int ret = 0; 1652 1653 error = spa_get_stats(zc->zc_name, &config, zc->zc_value, 1654 sizeof (zc->zc_value)); 1655 1656 if (config != NULL) { 1657 ret = put_nvlist(zc, config); 1658 nvlist_free(config); 1659 1660 /* 1661 * The config may be present even if 'error' is non-zero. 1662 * In this case we return success, and preserve the real errno 1663 * in 'zc_cookie'. 1664 */ 1665 zc->zc_cookie = error; 1666 } else { 1667 ret = error; 1668 } 1669 1670 return (ret); 1671} 1672 1673/* 1674 * Try to import the given pool, returning pool stats as appropriate so that 1675 * user land knows which devices are available and overall pool health. 1676 */ 1677static int 1678zfs_ioc_pool_tryimport(zfs_cmd_t *zc) 1679{ 1680 nvlist_t *tryconfig, *config; 1681 int error; 1682 1683 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1684 zc->zc_iflags, &tryconfig)) != 0) 1685 return (error); 1686 1687 config = spa_tryimport(tryconfig); 1688 1689 nvlist_free(tryconfig); 1690 1691 if (config == NULL) 1692 return (SET_ERROR(EINVAL)); 1693 1694 error = put_nvlist(zc, config); 1695 nvlist_free(config); 1696 1697 return (error); 1698} 1699 1700/* 1701 * inputs: 1702 * zc_name name of the pool 1703 * zc_cookie scan func (pool_scan_func_t) 1704 */ 1705static int 1706zfs_ioc_pool_scan(zfs_cmd_t *zc) 1707{ 1708 spa_t *spa; 1709 int error; 1710 1711 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1712 return (error); 1713 1714 if (zc->zc_cookie == POOL_SCAN_NONE) 1715 error = spa_scan_stop(spa); 1716 else 1717 error = spa_scan(spa, zc->zc_cookie); 1718 1719 spa_close(spa, FTAG); 1720 1721 return (error); 1722} 1723 1724static int 1725zfs_ioc_pool_freeze(zfs_cmd_t *zc) 1726{ 1727 spa_t *spa; 1728 int error; 1729 1730 error = spa_open(zc->zc_name, &spa, FTAG); 1731 if (error == 0) { 1732 spa_freeze(spa); 1733 spa_close(spa, FTAG); 1734 } 1735 return (error); 1736} 1737 1738static int 1739zfs_ioc_pool_upgrade(zfs_cmd_t *zc) 1740{ 1741 spa_t *spa; 1742 int error; 1743 1744 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1745 return (error); 1746 1747 if (zc->zc_cookie < spa_version(spa) || 1748 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) { 1749 spa_close(spa, FTAG); 1750 return (SET_ERROR(EINVAL)); 1751 } 1752 1753 spa_upgrade(spa, zc->zc_cookie); 1754 spa_close(spa, FTAG); 1755 1756 return (error); 1757} 1758 1759static int 1760zfs_ioc_pool_get_history(zfs_cmd_t *zc) 1761{ 1762 spa_t *spa; 1763 char *hist_buf; 1764 uint64_t size; 1765 int error; 1766 1767 if ((size = zc->zc_history_len) == 0) 1768 return (SET_ERROR(EINVAL)); 1769 1770 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1771 return (error); 1772 1773 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 1774 spa_close(spa, FTAG); 1775 return (SET_ERROR(ENOTSUP)); 1776 } 1777 1778 hist_buf = kmem_alloc(size, KM_SLEEP); 1779 if ((error = spa_history_get(spa, &zc->zc_history_offset, 1780 &zc->zc_history_len, hist_buf)) == 0) { 1781 error = ddi_copyout(hist_buf, 1782 (void *)(uintptr_t)zc->zc_history, 1783 zc->zc_history_len, zc->zc_iflags); 1784 } 1785 1786 spa_close(spa, FTAG); 1787 kmem_free(hist_buf, size); 1788 return (error); 1789} 1790 1791static int 1792zfs_ioc_pool_reguid(zfs_cmd_t *zc) 1793{ 1794 spa_t *spa; 1795 int error; 1796 1797 error = spa_open(zc->zc_name, &spa, FTAG); 1798 if (error == 0) { 1799 error = spa_change_guid(spa); 1800 spa_close(spa, FTAG); 1801 } 1802 return (error); 1803} 1804 1805static int 1806zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) 1807{ 1808 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)); 1809} 1810 1811/* 1812 * inputs: 1813 * zc_name name of filesystem 1814 * zc_obj object to find 1815 * 1816 * outputs: 1817 * zc_value name of object 1818 */ 1819static int 1820zfs_ioc_obj_to_path(zfs_cmd_t *zc) 1821{ 1822 objset_t *os; 1823 int error; 1824 1825 /* XXX reading from objset not owned */ 1826 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1827 return (error); 1828 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1829 dmu_objset_rele(os, FTAG); 1830 return (SET_ERROR(EINVAL)); 1831 } 1832 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, 1833 sizeof (zc->zc_value)); 1834 dmu_objset_rele(os, FTAG); 1835 1836 return (error); 1837} 1838 1839/* 1840 * inputs: 1841 * zc_name name of filesystem 1842 * zc_obj object to find 1843 * 1844 * outputs: 1845 * zc_stat stats on object 1846 * zc_value path to object 1847 */ 1848static int 1849zfs_ioc_obj_to_stats(zfs_cmd_t *zc) 1850{ 1851 objset_t *os; 1852 int error; 1853 1854 /* XXX reading from objset not owned */ 1855 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) 1856 return (error); 1857 if (dmu_objset_type(os) != DMU_OST_ZFS) { 1858 dmu_objset_rele(os, FTAG); 1859 return (SET_ERROR(EINVAL)); 1860 } 1861 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value, 1862 sizeof (zc->zc_value)); 1863 dmu_objset_rele(os, FTAG); 1864 1865 return (error); 1866} 1867 1868static int 1869zfs_ioc_vdev_add(zfs_cmd_t *zc) 1870{ 1871 spa_t *spa; 1872 int error; 1873 nvlist_t *config, **l2cache, **spares; 1874 uint_t nl2cache = 0, nspares = 0; 1875 1876 error = spa_open(zc->zc_name, &spa, FTAG); 1877 if (error != 0) 1878 return (error); 1879 1880 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1881 zc->zc_iflags, &config); 1882 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, 1883 &l2cache, &nl2cache); 1884 1885 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, 1886 &spares, &nspares); 1887 1888#ifdef illumos 1889 /* 1890 * A root pool with concatenated devices is not supported. 1891 * Thus, can not add a device to a root pool. 1892 * 1893 * Intent log device can not be added to a rootpool because 1894 * during mountroot, zil is replayed, a seperated log device 1895 * can not be accessed during the mountroot time. 1896 * 1897 * l2cache and spare devices are ok to be added to a rootpool. 1898 */ 1899 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { 1900 nvlist_free(config); 1901 spa_close(spa, FTAG); 1902 return (SET_ERROR(EDOM)); 1903 } 1904#endif /* illumos */ 1905 1906 if (error == 0) { 1907 error = spa_vdev_add(spa, config); 1908 nvlist_free(config); 1909 } 1910 spa_close(spa, FTAG); 1911 return (error); 1912} 1913 1914/* 1915 * inputs: 1916 * zc_name name of the pool 1917 * zc_nvlist_conf nvlist of devices to remove 1918 * zc_cookie to stop the remove? 1919 */ 1920static int 1921zfs_ioc_vdev_remove(zfs_cmd_t *zc) 1922{ 1923 spa_t *spa; 1924 int error; 1925 1926 error = spa_open(zc->zc_name, &spa, FTAG); 1927 if (error != 0) 1928 return (error); 1929 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); 1930 spa_close(spa, FTAG); 1931 return (error); 1932} 1933 1934static int 1935zfs_ioc_vdev_set_state(zfs_cmd_t *zc) 1936{ 1937 spa_t *spa; 1938 int error; 1939 vdev_state_t newstate = VDEV_STATE_UNKNOWN; 1940 1941 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1942 return (error); 1943 switch (zc->zc_cookie) { 1944 case VDEV_STATE_ONLINE: 1945 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); 1946 break; 1947 1948 case VDEV_STATE_OFFLINE: 1949 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); 1950 break; 1951 1952 case VDEV_STATE_FAULTED: 1953 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1954 zc->zc_obj != VDEV_AUX_EXTERNAL) 1955 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1956 1957 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); 1958 break; 1959 1960 case VDEV_STATE_DEGRADED: 1961 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && 1962 zc->zc_obj != VDEV_AUX_EXTERNAL) 1963 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; 1964 1965 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj); 1966 break; 1967 1968 default: 1969 error = SET_ERROR(EINVAL); 1970 } 1971 zc->zc_cookie = newstate; 1972 spa_close(spa, FTAG); 1973 return (error); 1974} 1975 1976static int 1977zfs_ioc_vdev_attach(zfs_cmd_t *zc) 1978{ 1979 spa_t *spa; 1980 int replacing = zc->zc_cookie; 1981 nvlist_t *config; 1982 int error; 1983 1984 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 1985 return (error); 1986 1987 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 1988 zc->zc_iflags, &config)) == 0) { 1989 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); 1990 nvlist_free(config); 1991 } 1992 1993 spa_close(spa, FTAG); 1994 return (error); 1995} 1996 1997static int 1998zfs_ioc_vdev_detach(zfs_cmd_t *zc) 1999{ 2000 spa_t *spa; 2001 int error; 2002 2003 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 2004 return (error); 2005 2006 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); 2007 2008 spa_close(spa, FTAG); 2009 return (error); 2010} 2011 2012static int 2013zfs_ioc_vdev_split(zfs_cmd_t *zc) 2014{ 2015 spa_t *spa; 2016 nvlist_t *config, *props = NULL; 2017 int error; 2018 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT); 2019 2020 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 2021 return (error); 2022 2023 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, 2024 zc->zc_iflags, &config)) { 2025 spa_close(spa, FTAG); 2026 return (error); 2027 } 2028 2029 if (zc->zc_nvlist_src_size != 0 && (error = 2030 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2031 zc->zc_iflags, &props))) { 2032 spa_close(spa, FTAG); 2033 nvlist_free(config); 2034 return (error); 2035 } 2036 2037 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp); 2038 2039 spa_close(spa, FTAG); 2040 2041 nvlist_free(config); 2042 nvlist_free(props); 2043 2044 return (error); 2045} 2046 2047static int 2048zfs_ioc_vdev_setpath(zfs_cmd_t *zc) 2049{ 2050 spa_t *spa; 2051 char *path = zc->zc_value; 2052 uint64_t guid = zc->zc_guid; 2053 int error; 2054 2055 error = spa_open(zc->zc_name, &spa, FTAG); 2056 if (error != 0) 2057 return (error); 2058 2059 error = spa_vdev_setpath(spa, guid, path); 2060 spa_close(spa, FTAG); 2061 return (error); 2062} 2063 2064static int 2065zfs_ioc_vdev_setfru(zfs_cmd_t *zc) 2066{ 2067 spa_t *spa; 2068 char *fru = zc->zc_value; 2069 uint64_t guid = zc->zc_guid; 2070 int error; 2071 2072 error = spa_open(zc->zc_name, &spa, FTAG); 2073 if (error != 0) 2074 return (error); 2075 2076 error = spa_vdev_setfru(spa, guid, fru); 2077 spa_close(spa, FTAG); 2078 return (error); 2079} 2080 2081static int 2082zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os) 2083{ 2084 int error = 0; 2085 nvlist_t *nv; 2086 2087 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 2088 2089 if (zc->zc_nvlist_dst != 0 && 2090 (error = dsl_prop_get_all(os, &nv)) == 0) { 2091 dmu_objset_stats(os, nv); 2092 /* 2093 * NB: zvol_get_stats() will read the objset contents, 2094 * which we aren't supposed to do with a 2095 * DS_MODE_USER hold, because it could be 2096 * inconsistent. So this is a bit of a workaround... 2097 * XXX reading with out owning 2098 */ 2099 if (!zc->zc_objset_stats.dds_inconsistent && 2100 dmu_objset_type(os) == DMU_OST_ZVOL) { 2101 error = zvol_get_stats(os, nv); 2102 if (error == EIO) 2103 return (error); 2104 VERIFY0(error); 2105 } 2106 error = put_nvlist(zc, nv); 2107 nvlist_free(nv); 2108 } 2109 2110 return (error); 2111} 2112 2113/* 2114 * inputs: 2115 * zc_name name of filesystem 2116 * zc_nvlist_dst_size size of buffer for property nvlist 2117 * 2118 * outputs: 2119 * zc_objset_stats stats 2120 * zc_nvlist_dst property nvlist 2121 * zc_nvlist_dst_size size of property nvlist 2122 */ 2123static int 2124zfs_ioc_objset_stats(zfs_cmd_t *zc) 2125{ 2126 objset_t *os; 2127 int error; 2128 2129 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2130 if (error == 0) { 2131 error = zfs_ioc_objset_stats_impl(zc, os); 2132 dmu_objset_rele(os, FTAG); 2133 } 2134 2135 if (error == ENOMEM) 2136 error = 0; 2137 return (error); 2138} 2139 2140/* 2141 * inputs: 2142 * zc_name name of filesystem 2143 * zc_nvlist_dst_size size of buffer for property nvlist 2144 * 2145 * outputs: 2146 * zc_nvlist_dst received property nvlist 2147 * zc_nvlist_dst_size size of received property nvlist 2148 * 2149 * Gets received properties (distinct from local properties on or after 2150 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from 2151 * local property values. 2152 */ 2153static int 2154zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) 2155{ 2156 int error = 0; 2157 nvlist_t *nv; 2158 2159 /* 2160 * Without this check, we would return local property values if the 2161 * caller has not already received properties on or after 2162 * SPA_VERSION_RECVD_PROPS. 2163 */ 2164 if (!dsl_prop_get_hasrecvd(zc->zc_name)) 2165 return (SET_ERROR(ENOTSUP)); 2166 2167 if (zc->zc_nvlist_dst != 0 && 2168 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) { 2169 error = put_nvlist(zc, nv); 2170 nvlist_free(nv); 2171 } 2172 2173 return (error); 2174} 2175 2176static int 2177nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) 2178{ 2179 uint64_t value; 2180 int error; 2181 2182 /* 2183 * zfs_get_zplprop() will either find a value or give us 2184 * the default value (if there is one). 2185 */ 2186 if ((error = zfs_get_zplprop(os, prop, &value)) != 0) 2187 return (error); 2188 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); 2189 return (0); 2190} 2191 2192/* 2193 * inputs: 2194 * zc_name name of filesystem 2195 * zc_nvlist_dst_size size of buffer for zpl property nvlist 2196 * 2197 * outputs: 2198 * zc_nvlist_dst zpl property nvlist 2199 * zc_nvlist_dst_size size of zpl property nvlist 2200 */ 2201static int 2202zfs_ioc_objset_zplprops(zfs_cmd_t *zc) 2203{ 2204 objset_t *os; 2205 int err; 2206 2207 /* XXX reading without owning */ 2208 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) 2209 return (err); 2210 2211 dmu_objset_fast_stat(os, &zc->zc_objset_stats); 2212 2213 /* 2214 * NB: nvl_add_zplprop() will read the objset contents, 2215 * which we aren't supposed to do with a DS_MODE_USER 2216 * hold, because it could be inconsistent. 2217 */ 2218 if (zc->zc_nvlist_dst != 0 && 2219 !zc->zc_objset_stats.dds_inconsistent && 2220 dmu_objset_type(os) == DMU_OST_ZFS) { 2221 nvlist_t *nv; 2222 2223 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2224 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && 2225 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && 2226 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && 2227 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) 2228 err = put_nvlist(zc, nv); 2229 nvlist_free(nv); 2230 } else { 2231 err = SET_ERROR(ENOENT); 2232 } 2233 dmu_objset_rele(os, FTAG); 2234 return (err); 2235} 2236 2237boolean_t 2238dataset_name_hidden(const char *name) 2239{ 2240 /* 2241 * Skip over datasets that are not visible in this zone, 2242 * internal datasets (which have a $ in their name), and 2243 * temporary datasets (which have a % in their name). 2244 */ 2245 if (strchr(name, '$') != NULL) 2246 return (B_TRUE); 2247 if (strchr(name, '%') != NULL) 2248 return (B_TRUE); 2249 if (!INGLOBALZONE(curthread) && !zone_dataset_visible(name, NULL)) 2250 return (B_TRUE); 2251 return (B_FALSE); 2252} 2253 2254/* 2255 * inputs: 2256 * zc_name name of filesystem 2257 * zc_cookie zap cursor 2258 * zc_nvlist_dst_size size of buffer for property nvlist 2259 * 2260 * outputs: 2261 * zc_name name of next filesystem 2262 * zc_cookie zap cursor 2263 * zc_objset_stats stats 2264 * zc_nvlist_dst property nvlist 2265 * zc_nvlist_dst_size size of property nvlist 2266 */ 2267static int 2268zfs_ioc_dataset_list_next(zfs_cmd_t *zc) 2269{ 2270 objset_t *os; 2271 int error; 2272 char *p; 2273 size_t orig_len = strlen(zc->zc_name); 2274 2275top: 2276 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { 2277 if (error == ENOENT) 2278 error = SET_ERROR(ESRCH); 2279 return (error); 2280 } 2281 2282 p = strrchr(zc->zc_name, '/'); 2283 if (p == NULL || p[1] != '\0') 2284 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); 2285 p = zc->zc_name + strlen(zc->zc_name); 2286 2287 do { 2288 error = dmu_dir_list_next(os, 2289 sizeof (zc->zc_name) - (p - zc->zc_name), p, 2290 NULL, &zc->zc_cookie); 2291 if (error == ENOENT) 2292 error = SET_ERROR(ESRCH); 2293 } while (error == 0 && dataset_name_hidden(zc->zc_name)); 2294 dmu_objset_rele(os, FTAG); 2295 2296 /* 2297 * If it's an internal dataset (ie. with a '$' in its name), 2298 * don't try to get stats for it, otherwise we'll return ENOENT. 2299 */ 2300 if (error == 0 && strchr(zc->zc_name, '$') == NULL) { 2301 error = zfs_ioc_objset_stats(zc); /* fill in the stats */ 2302 if (error == ENOENT) { 2303 /* We lost a race with destroy, get the next one. */ 2304 zc->zc_name[orig_len] = '\0'; 2305 goto top; 2306 } 2307 } 2308 return (error); 2309} 2310 2311/* 2312 * inputs: 2313 * zc_name name of filesystem 2314 * zc_cookie zap cursor 2315 * zc_nvlist_dst_size size of buffer for property nvlist 2316 * zc_simple when set, only name is requested 2317 * 2318 * outputs: 2319 * zc_name name of next snapshot 2320 * zc_objset_stats stats 2321 * zc_nvlist_dst property nvlist 2322 * zc_nvlist_dst_size size of property nvlist 2323 */ 2324static int 2325zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) 2326{ 2327 objset_t *os; 2328 int error; 2329 2330 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 2331 if (error != 0) { 2332 return (error == ENOENT ? ESRCH : error); 2333 } 2334 2335 /* 2336 * A dataset name of maximum length cannot have any snapshots, 2337 * so exit immediately. 2338 */ 2339 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { 2340 dmu_objset_rele(os, FTAG); 2341 return (SET_ERROR(ESRCH)); 2342 } 2343 2344 error = dmu_snapshot_list_next(os, 2345 sizeof (zc->zc_name) - strlen(zc->zc_name), 2346 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie, 2347 NULL); 2348 2349 if (error == 0 && !zc->zc_simple) { 2350 dsl_dataset_t *ds; 2351 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool; 2352 2353 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds); 2354 if (error == 0) { 2355 objset_t *ossnap; 2356 2357 error = dmu_objset_from_ds(ds, &ossnap); 2358 if (error == 0) 2359 error = zfs_ioc_objset_stats_impl(zc, ossnap); 2360 dsl_dataset_rele(ds, FTAG); 2361 } 2362 } else if (error == ENOENT) { 2363 error = SET_ERROR(ESRCH); 2364 } 2365 2366 dmu_objset_rele(os, FTAG); 2367 /* if we failed, undo the @ that we tacked on to zc_name */ 2368 if (error != 0) 2369 *strchr(zc->zc_name, '@') = '\0'; 2370 return (error); 2371} 2372 2373static int 2374zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) 2375{ 2376 const char *propname = nvpair_name(pair); 2377 uint64_t *valary; 2378 unsigned int vallen; 2379 const char *domain; 2380 char *dash; 2381 zfs_userquota_prop_t type; 2382 uint64_t rid; 2383 uint64_t quota; 2384 zfsvfs_t *zfsvfs; 2385 int err; 2386 2387 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2388 nvlist_t *attrs; 2389 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2390 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2391 &pair) != 0) 2392 return (SET_ERROR(EINVAL)); 2393 } 2394 2395 /* 2396 * A correctly constructed propname is encoded as 2397 * userquota@<rid>-<domain>. 2398 */ 2399 if ((dash = strchr(propname, '-')) == NULL || 2400 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 || 2401 vallen != 3) 2402 return (SET_ERROR(EINVAL)); 2403 2404 domain = dash + 1; 2405 type = valary[0]; 2406 rid = valary[1]; 2407 quota = valary[2]; 2408 2409 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE); 2410 if (err == 0) { 2411 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); 2412 zfsvfs_rele(zfsvfs, FTAG); 2413 } 2414 2415 return (err); 2416} 2417 2418/* 2419 * If the named property is one that has a special function to set its value, 2420 * return 0 on success and a positive error code on failure; otherwise if it is 2421 * not one of the special properties handled by this function, return -1. 2422 * 2423 * XXX: It would be better for callers of the property interface if we handled 2424 * these special cases in dsl_prop.c (in the dsl layer). 2425 */ 2426static int 2427zfs_prop_set_special(const char *dsname, zprop_source_t source, 2428 nvpair_t *pair) 2429{ 2430 const char *propname = nvpair_name(pair); 2431 zfs_prop_t prop = zfs_name_to_prop(propname); 2432 uint64_t intval; 2433 int err; 2434 2435 if (prop == ZPROP_INVAL) { 2436 if (zfs_prop_userquota(propname)) 2437 return (zfs_prop_set_userquota(dsname, pair)); 2438 return (-1); 2439 } 2440 2441 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2442 nvlist_t *attrs; 2443 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 2444 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2445 &pair) == 0); 2446 } 2447 2448 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) 2449 return (-1); 2450 2451 VERIFY(0 == nvpair_value_uint64(pair, &intval)); 2452 2453 switch (prop) { 2454 case ZFS_PROP_QUOTA: 2455 err = dsl_dir_set_quota(dsname, source, intval); 2456 break; 2457 case ZFS_PROP_REFQUOTA: 2458 err = dsl_dataset_set_refquota(dsname, source, intval); 2459 break; 2460 case ZFS_PROP_RESERVATION: 2461 err = dsl_dir_set_reservation(dsname, source, intval); 2462 break; 2463 case ZFS_PROP_REFRESERVATION: 2464 err = dsl_dataset_set_refreservation(dsname, source, intval); 2465 break; 2466 case ZFS_PROP_VOLSIZE: 2467 err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip), 2468 intval); 2469 break; 2470 case ZFS_PROP_VERSION: 2471 { 2472 zfsvfs_t *zfsvfs; 2473 2474 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0) 2475 break; 2476 2477 err = zfs_set_version(zfsvfs, intval); 2478 zfsvfs_rele(zfsvfs, FTAG); 2479 2480 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { 2481 zfs_cmd_t *zc; 2482 2483 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 2484 (void) strcpy(zc->zc_name, dsname); 2485 (void) zfs_ioc_userspace_upgrade(zc); 2486 kmem_free(zc, sizeof (zfs_cmd_t)); 2487 } 2488 break; 2489 } 2490 case ZFS_PROP_COMPRESSION: 2491 { 2492 if (intval == ZIO_COMPRESS_LZ4) { 2493 spa_t *spa; 2494 2495 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 2496 return (err); 2497 2498 /* 2499 * Setting the LZ4 compression algorithm activates 2500 * the feature. 2501 */ 2502 if (!spa_feature_is_active(spa, 2503 SPA_FEATURE_LZ4_COMPRESS)) { 2504 if ((err = zfs_prop_activate_feature(spa, 2505 SPA_FEATURE_LZ4_COMPRESS)) != 0) { 2506 spa_close(spa, FTAG); 2507 return (err); 2508 } 2509 } 2510 2511 spa_close(spa, FTAG); 2512 } 2513 /* 2514 * We still want the default set action to be performed in the 2515 * caller, we only performed zfeature settings here. 2516 */ 2517 err = -1; 2518 break; 2519 } 2520 2521 default: 2522 err = -1; 2523 } 2524 2525 return (err); 2526} 2527 2528/* 2529 * This function is best effort. If it fails to set any of the given properties, 2530 * it continues to set as many as it can and returns the last error 2531 * encountered. If the caller provides a non-NULL errlist, it will be filled in 2532 * with the list of names of all the properties that failed along with the 2533 * corresponding error numbers. 2534 * 2535 * If every property is set successfully, zero is returned and errlist is not 2536 * modified. 2537 */ 2538int 2539zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, 2540 nvlist_t *errlist) 2541{ 2542 nvpair_t *pair; 2543 nvpair_t *propval; 2544 int rv = 0; 2545 uint64_t intval; 2546 char *strval; 2547 nvlist_t *genericnvl = fnvlist_alloc(); 2548 nvlist_t *retrynvl = fnvlist_alloc(); 2549 2550retry: 2551 pair = NULL; 2552 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2553 const char *propname = nvpair_name(pair); 2554 zfs_prop_t prop = zfs_name_to_prop(propname); 2555 int err = 0; 2556 2557 /* decode the property value */ 2558 propval = pair; 2559 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2560 nvlist_t *attrs; 2561 attrs = fnvpair_value_nvlist(pair); 2562 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 2563 &propval) != 0) 2564 err = SET_ERROR(EINVAL); 2565 } 2566 2567 /* Validate value type */ 2568 if (err == 0 && prop == ZPROP_INVAL) { 2569 if (zfs_prop_user(propname)) { 2570 if (nvpair_type(propval) != DATA_TYPE_STRING) 2571 err = SET_ERROR(EINVAL); 2572 } else if (zfs_prop_userquota(propname)) { 2573 if (nvpair_type(propval) != 2574 DATA_TYPE_UINT64_ARRAY) 2575 err = SET_ERROR(EINVAL); 2576 } else { 2577 err = SET_ERROR(EINVAL); 2578 } 2579 } else if (err == 0) { 2580 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2581 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) 2582 err = SET_ERROR(EINVAL); 2583 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { 2584 const char *unused; 2585 2586 intval = fnvpair_value_uint64(propval); 2587 2588 switch (zfs_prop_get_type(prop)) { 2589 case PROP_TYPE_NUMBER: 2590 break; 2591 case PROP_TYPE_STRING: 2592 err = SET_ERROR(EINVAL); 2593 break; 2594 case PROP_TYPE_INDEX: 2595 if (zfs_prop_index_to_string(prop, 2596 intval, &unused) != 0) 2597 err = SET_ERROR(EINVAL); 2598 break; 2599 default: 2600 cmn_err(CE_PANIC, 2601 "unknown property type"); 2602 } 2603 } else { 2604 err = SET_ERROR(EINVAL); 2605 } 2606 } 2607 2608 /* Validate permissions */ 2609 if (err == 0) 2610 err = zfs_check_settable(dsname, pair, CRED()); 2611 2612 if (err == 0) { 2613 err = zfs_prop_set_special(dsname, source, pair); 2614 if (err == -1) { 2615 /* 2616 * For better performance we build up a list of 2617 * properties to set in a single transaction. 2618 */ 2619 err = nvlist_add_nvpair(genericnvl, pair); 2620 } else if (err != 0 && nvl != retrynvl) { 2621 /* 2622 * This may be a spurious error caused by 2623 * receiving quota and reservation out of order. 2624 * Try again in a second pass. 2625 */ 2626 err = nvlist_add_nvpair(retrynvl, pair); 2627 } 2628 } 2629 2630 if (err != 0) { 2631 if (errlist != NULL) 2632 fnvlist_add_int32(errlist, propname, err); 2633 rv = err; 2634 } 2635 } 2636 2637 if (nvl != retrynvl && !nvlist_empty(retrynvl)) { 2638 nvl = retrynvl; 2639 goto retry; 2640 } 2641 2642 if (!nvlist_empty(genericnvl) && 2643 dsl_props_set(dsname, source, genericnvl) != 0) { 2644 /* 2645 * If this fails, we still want to set as many properties as we 2646 * can, so try setting them individually. 2647 */ 2648 pair = NULL; 2649 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { 2650 const char *propname = nvpair_name(pair); 2651 int err = 0; 2652 2653 propval = pair; 2654 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 2655 nvlist_t *attrs; 2656 attrs = fnvpair_value_nvlist(pair); 2657 propval = fnvlist_lookup_nvpair(attrs, 2658 ZPROP_VALUE); 2659 } 2660 2661 if (nvpair_type(propval) == DATA_TYPE_STRING) { 2662 strval = fnvpair_value_string(propval); 2663 err = dsl_prop_set_string(dsname, propname, 2664 source, strval); 2665 } else { 2666 intval = fnvpair_value_uint64(propval); 2667 err = dsl_prop_set_int(dsname, propname, source, 2668 intval); 2669 } 2670 2671 if (err != 0) { 2672 if (errlist != NULL) { 2673 fnvlist_add_int32(errlist, propname, 2674 err); 2675 } 2676 rv = err; 2677 } 2678 } 2679 } 2680 nvlist_free(genericnvl); 2681 nvlist_free(retrynvl); 2682 2683 return (rv); 2684} 2685 2686/* 2687 * Check that all the properties are valid user properties. 2688 */ 2689static int 2690zfs_check_userprops(const char *fsname, nvlist_t *nvl) 2691{ 2692 nvpair_t *pair = NULL; 2693 int error = 0; 2694 2695 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { 2696 const char *propname = nvpair_name(pair); 2697 2698 if (!zfs_prop_user(propname) || 2699 nvpair_type(pair) != DATA_TYPE_STRING) 2700 return (SET_ERROR(EINVAL)); 2701 2702 if (error = zfs_secpolicy_write_perms(fsname, 2703 ZFS_DELEG_PERM_USERPROP, CRED())) 2704 return (error); 2705 2706 if (strlen(propname) >= ZAP_MAXNAMELEN) 2707 return (SET_ERROR(ENAMETOOLONG)); 2708 2709 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN) 2710 return (E2BIG); 2711 } 2712 return (0); 2713} 2714 2715static void 2716props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) 2717{ 2718 nvpair_t *pair; 2719 2720 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2721 2722 pair = NULL; 2723 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { 2724 if (nvlist_exists(skipped, nvpair_name(pair))) 2725 continue; 2726 2727 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); 2728 } 2729} 2730 2731static int 2732clear_received_props(const char *dsname, nvlist_t *props, 2733 nvlist_t *skipped) 2734{ 2735 int err = 0; 2736 nvlist_t *cleared_props = NULL; 2737 props_skip(props, skipped, &cleared_props); 2738 if (!nvlist_empty(cleared_props)) { 2739 /* 2740 * Acts on local properties until the dataset has received 2741 * properties at least once on or after SPA_VERSION_RECVD_PROPS. 2742 */ 2743 zprop_source_t flags = (ZPROP_SRC_NONE | 2744 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0)); 2745 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL); 2746 } 2747 nvlist_free(cleared_props); 2748 return (err); 2749} 2750 2751/* 2752 * inputs: 2753 * zc_name name of filesystem 2754 * zc_value name of property to set 2755 * zc_nvlist_src{_size} nvlist of properties to apply 2756 * zc_cookie received properties flag 2757 * 2758 * outputs: 2759 * zc_nvlist_dst{_size} error for each unapplied received property 2760 */ 2761static int 2762zfs_ioc_set_prop(zfs_cmd_t *zc) 2763{ 2764 nvlist_t *nvl; 2765 boolean_t received = zc->zc_cookie; 2766 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : 2767 ZPROP_SRC_LOCAL); 2768 nvlist_t *errors; 2769 int error; 2770 2771 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2772 zc->zc_iflags, &nvl)) != 0) 2773 return (error); 2774 2775 if (received) { 2776 nvlist_t *origprops; 2777 2778 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) { 2779 (void) clear_received_props(zc->zc_name, 2780 origprops, nvl); 2781 nvlist_free(origprops); 2782 } 2783 2784 error = dsl_prop_set_hasrecvd(zc->zc_name); 2785 } 2786 2787 errors = fnvlist_alloc(); 2788 if (error == 0) 2789 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors); 2790 2791 if (zc->zc_nvlist_dst != 0 && errors != NULL) { 2792 (void) put_nvlist(zc, errors); 2793 } 2794 2795 nvlist_free(errors); 2796 nvlist_free(nvl); 2797 return (error); 2798} 2799 2800/* 2801 * inputs: 2802 * zc_name name of filesystem 2803 * zc_value name of property to inherit 2804 * zc_cookie revert to received value if TRUE 2805 * 2806 * outputs: none 2807 */ 2808static int 2809zfs_ioc_inherit_prop(zfs_cmd_t *zc) 2810{ 2811 const char *propname = zc->zc_value; 2812 zfs_prop_t prop = zfs_name_to_prop(propname); 2813 boolean_t received = zc->zc_cookie; 2814 zprop_source_t source = (received 2815 ? ZPROP_SRC_NONE /* revert to received value, if any */ 2816 : ZPROP_SRC_INHERITED); /* explicitly inherit */ 2817 2818 if (received) { 2819 nvlist_t *dummy; 2820 nvpair_t *pair; 2821 zprop_type_t type; 2822 int err; 2823 2824 /* 2825 * zfs_prop_set_special() expects properties in the form of an 2826 * nvpair with type info. 2827 */ 2828 if (prop == ZPROP_INVAL) { 2829 if (!zfs_prop_user(propname)) 2830 return (SET_ERROR(EINVAL)); 2831 2832 type = PROP_TYPE_STRING; 2833 } else if (prop == ZFS_PROP_VOLSIZE || 2834 prop == ZFS_PROP_VERSION) { 2835 return (SET_ERROR(EINVAL)); 2836 } else { 2837 type = zfs_prop_get_type(prop); 2838 } 2839 2840 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2841 2842 switch (type) { 2843 case PROP_TYPE_STRING: 2844 VERIFY(0 == nvlist_add_string(dummy, propname, "")); 2845 break; 2846 case PROP_TYPE_NUMBER: 2847 case PROP_TYPE_INDEX: 2848 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); 2849 break; 2850 default: 2851 nvlist_free(dummy); 2852 return (SET_ERROR(EINVAL)); 2853 } 2854 2855 pair = nvlist_next_nvpair(dummy, NULL); 2856 err = zfs_prop_set_special(zc->zc_name, source, pair); 2857 nvlist_free(dummy); 2858 if (err != -1) 2859 return (err); /* special property already handled */ 2860 } else { 2861 /* 2862 * Only check this in the non-received case. We want to allow 2863 * 'inherit -S' to revert non-inheritable properties like quota 2864 * and reservation to the received or default values even though 2865 * they are not considered inheritable. 2866 */ 2867 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) 2868 return (SET_ERROR(EINVAL)); 2869 } 2870 2871 /* property name has been validated by zfs_secpolicy_inherit_prop() */ 2872 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source)); 2873} 2874 2875static int 2876zfs_ioc_pool_set_props(zfs_cmd_t *zc) 2877{ 2878 nvlist_t *props; 2879 spa_t *spa; 2880 int error; 2881 nvpair_t *pair; 2882 2883 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2884 zc->zc_iflags, &props)) 2885 return (error); 2886 2887 /* 2888 * If the only property is the configfile, then just do a spa_lookup() 2889 * to handle the faulted case. 2890 */ 2891 pair = nvlist_next_nvpair(props, NULL); 2892 if (pair != NULL && strcmp(nvpair_name(pair), 2893 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && 2894 nvlist_next_nvpair(props, pair) == NULL) { 2895 mutex_enter(&spa_namespace_lock); 2896 if ((spa = spa_lookup(zc->zc_name)) != NULL) { 2897 spa_configfile_set(spa, props, B_FALSE); 2898 spa_config_sync(spa, B_FALSE, B_TRUE); 2899 } 2900 mutex_exit(&spa_namespace_lock); 2901 if (spa != NULL) { 2902 nvlist_free(props); 2903 return (0); 2904 } 2905 } 2906 2907 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2908 nvlist_free(props); 2909 return (error); 2910 } 2911 2912 error = spa_prop_set(spa, props); 2913 2914 nvlist_free(props); 2915 spa_close(spa, FTAG); 2916 2917 return (error); 2918} 2919 2920static int 2921zfs_ioc_pool_get_props(zfs_cmd_t *zc) 2922{ 2923 spa_t *spa; 2924 int error; 2925 nvlist_t *nvp = NULL; 2926 2927 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { 2928 /* 2929 * If the pool is faulted, there may be properties we can still 2930 * get (such as altroot and cachefile), so attempt to get them 2931 * anyway. 2932 */ 2933 mutex_enter(&spa_namespace_lock); 2934 if ((spa = spa_lookup(zc->zc_name)) != NULL) 2935 error = spa_prop_get(spa, &nvp); 2936 mutex_exit(&spa_namespace_lock); 2937 } else { 2938 error = spa_prop_get(spa, &nvp); 2939 spa_close(spa, FTAG); 2940 } 2941 2942 if (error == 0 && zc->zc_nvlist_dst != 0) 2943 error = put_nvlist(zc, nvp); 2944 else 2945 error = SET_ERROR(EFAULT); 2946 2947 nvlist_free(nvp); 2948 return (error); 2949} 2950 2951/* 2952 * inputs: 2953 * zc_name name of filesystem 2954 * zc_nvlist_src{_size} nvlist of delegated permissions 2955 * zc_perm_action allow/unallow flag 2956 * 2957 * outputs: none 2958 */ 2959static int 2960zfs_ioc_set_fsacl(zfs_cmd_t *zc) 2961{ 2962 int error; 2963 nvlist_t *fsaclnv = NULL; 2964 2965 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 2966 zc->zc_iflags, &fsaclnv)) != 0) 2967 return (error); 2968 2969 /* 2970 * Verify nvlist is constructed correctly 2971 */ 2972 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { 2973 nvlist_free(fsaclnv); 2974 return (SET_ERROR(EINVAL)); 2975 } 2976 2977 /* 2978 * If we don't have PRIV_SYS_MOUNT, then validate 2979 * that user is allowed to hand out each permission in 2980 * the nvlist(s) 2981 */ 2982 2983 error = secpolicy_zfs(CRED()); 2984 if (error != 0) { 2985 if (zc->zc_perm_action == B_FALSE) { 2986 error = dsl_deleg_can_allow(zc->zc_name, 2987 fsaclnv, CRED()); 2988 } else { 2989 error = dsl_deleg_can_unallow(zc->zc_name, 2990 fsaclnv, CRED()); 2991 } 2992 } 2993 2994 if (error == 0) 2995 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); 2996 2997 nvlist_free(fsaclnv); 2998 return (error); 2999} 3000 3001/* 3002 * inputs: 3003 * zc_name name of filesystem 3004 * 3005 * outputs: 3006 * zc_nvlist_src{_size} nvlist of delegated permissions 3007 */ 3008static int 3009zfs_ioc_get_fsacl(zfs_cmd_t *zc) 3010{ 3011 nvlist_t *nvp; 3012 int error; 3013 3014 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { 3015 error = put_nvlist(zc, nvp); 3016 nvlist_free(nvp); 3017 } 3018 3019 return (error); 3020} 3021 3022/* 3023 * Search the vfs list for a specified resource. Returns a pointer to it 3024 * or NULL if no suitable entry is found. The caller of this routine 3025 * is responsible for releasing the returned vfs pointer. 3026 */ 3027static vfs_t * 3028zfs_get_vfs(const char *resource) 3029{ 3030 vfs_t *vfsp; 3031 3032 mtx_lock(&mountlist_mtx); 3033 TAILQ_FOREACH(vfsp, &mountlist, mnt_list) { 3034 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { 3035 VFS_HOLD(vfsp); 3036 break; 3037 } 3038 } 3039 mtx_unlock(&mountlist_mtx); 3040 return (vfsp); 3041} 3042 3043/* ARGSUSED */ 3044static void 3045zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) 3046{ 3047 zfs_creat_t *zct = arg; 3048 3049 zfs_create_fs(os, cr, zct->zct_zplprops, tx); 3050} 3051 3052#define ZFS_PROP_UNDEFINED ((uint64_t)-1) 3053 3054/* 3055 * inputs: 3056 * os parent objset pointer (NULL if root fs) 3057 * fuids_ok fuids allowed in this version of the spa? 3058 * sa_ok SAs allowed in this version of the spa? 3059 * createprops list of properties requested by creator 3060 * 3061 * outputs: 3062 * zplprops values for the zplprops we attach to the master node object 3063 * is_ci true if requested file system will be purely case-insensitive 3064 * 3065 * Determine the settings for utf8only, normalization and 3066 * casesensitivity. Specific values may have been requested by the 3067 * creator and/or we can inherit values from the parent dataset. If 3068 * the file system is of too early a vintage, a creator can not 3069 * request settings for these properties, even if the requested 3070 * setting is the default value. We don't actually want to create dsl 3071 * properties for these, so remove them from the source nvlist after 3072 * processing. 3073 */ 3074static int 3075zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, 3076 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops, 3077 nvlist_t *zplprops, boolean_t *is_ci) 3078{ 3079 uint64_t sense = ZFS_PROP_UNDEFINED; 3080 uint64_t norm = ZFS_PROP_UNDEFINED; 3081 uint64_t u8 = ZFS_PROP_UNDEFINED; 3082 3083 ASSERT(zplprops != NULL); 3084 3085 /* 3086 * Pull out creator prop choices, if any. 3087 */ 3088 if (createprops) { 3089 (void) nvlist_lookup_uint64(createprops, 3090 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); 3091 (void) nvlist_lookup_uint64(createprops, 3092 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); 3093 (void) nvlist_remove_all(createprops, 3094 zfs_prop_to_name(ZFS_PROP_NORMALIZE)); 3095 (void) nvlist_lookup_uint64(createprops, 3096 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); 3097 (void) nvlist_remove_all(createprops, 3098 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 3099 (void) nvlist_lookup_uint64(createprops, 3100 zfs_prop_to_name(ZFS_PROP_CASE), &sense); 3101 (void) nvlist_remove_all(createprops, 3102 zfs_prop_to_name(ZFS_PROP_CASE)); 3103 } 3104 3105 /* 3106 * If the zpl version requested is whacky or the file system 3107 * or pool is version is too "young" to support normalization 3108 * and the creator tried to set a value for one of the props, 3109 * error out. 3110 */ 3111 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || 3112 (zplver >= ZPL_VERSION_FUID && !fuids_ok) || 3113 (zplver >= ZPL_VERSION_SA && !sa_ok) || 3114 (zplver < ZPL_VERSION_NORMALIZATION && 3115 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || 3116 sense != ZFS_PROP_UNDEFINED))) 3117 return (SET_ERROR(ENOTSUP)); 3118 3119 /* 3120 * Put the version in the zplprops 3121 */ 3122 VERIFY(nvlist_add_uint64(zplprops, 3123 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); 3124 3125 if (norm == ZFS_PROP_UNDEFINED) 3126 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); 3127 VERIFY(nvlist_add_uint64(zplprops, 3128 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); 3129 3130 /* 3131 * If we're normalizing, names must always be valid UTF-8 strings. 3132 */ 3133 if (norm) 3134 u8 = 1; 3135 if (u8 == ZFS_PROP_UNDEFINED) 3136 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); 3137 VERIFY(nvlist_add_uint64(zplprops, 3138 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); 3139 3140 if (sense == ZFS_PROP_UNDEFINED) 3141 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); 3142 VERIFY(nvlist_add_uint64(zplprops, 3143 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); 3144 3145 if (is_ci) 3146 *is_ci = (sense == ZFS_CASE_INSENSITIVE); 3147 3148 return (0); 3149} 3150 3151static int 3152zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, 3153 nvlist_t *zplprops, boolean_t *is_ci) 3154{ 3155 boolean_t fuids_ok, sa_ok; 3156 uint64_t zplver = ZPL_VERSION; 3157 objset_t *os = NULL; 3158 char parentname[MAXNAMELEN]; 3159 char *cp; 3160 spa_t *spa; 3161 uint64_t spa_vers; 3162 int error; 3163 3164 (void) strlcpy(parentname, dataset, sizeof (parentname)); 3165 cp = strrchr(parentname, '/'); 3166 ASSERT(cp != NULL); 3167 cp[0] = '\0'; 3168 3169 if ((error = spa_open(dataset, &spa, FTAG)) != 0) 3170 return (error); 3171 3172 spa_vers = spa_version(spa); 3173 spa_close(spa, FTAG); 3174 3175 zplver = zfs_zpl_version_map(spa_vers); 3176 fuids_ok = (zplver >= ZPL_VERSION_FUID); 3177 sa_ok = (zplver >= ZPL_VERSION_SA); 3178 3179 /* 3180 * Open parent object set so we can inherit zplprop values. 3181 */ 3182 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) 3183 return (error); 3184 3185 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops, 3186 zplprops, is_ci); 3187 dmu_objset_rele(os, FTAG); 3188 return (error); 3189} 3190 3191static int 3192zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, 3193 nvlist_t *zplprops, boolean_t *is_ci) 3194{ 3195 boolean_t fuids_ok; 3196 boolean_t sa_ok; 3197 uint64_t zplver = ZPL_VERSION; 3198 int error; 3199 3200 zplver = zfs_zpl_version_map(spa_vers); 3201 fuids_ok = (zplver >= ZPL_VERSION_FUID); 3202 sa_ok = (zplver >= ZPL_VERSION_SA); 3203 3204 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok, 3205 createprops, zplprops, is_ci); 3206 return (error); 3207} 3208 3209/* 3210 * innvl: { 3211 * "type" -> dmu_objset_type_t (int32) 3212 * (optional) "props" -> { prop -> value } 3213 * } 3214 * 3215 * outnvl: propname -> error code (int32) 3216 */ 3217static int 3218zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3219{ 3220 int error = 0; 3221 zfs_creat_t zct = { 0 }; 3222 nvlist_t *nvprops = NULL; 3223 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 3224 int32_t type32; 3225 dmu_objset_type_t type; 3226 boolean_t is_insensitive = B_FALSE; 3227 3228 if (nvlist_lookup_int32(innvl, "type", &type32) != 0) 3229 return (SET_ERROR(EINVAL)); 3230 type = type32; 3231 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); 3232 3233 switch (type) { 3234 case DMU_OST_ZFS: 3235 cbfunc = zfs_create_cb; 3236 break; 3237 3238 case DMU_OST_ZVOL: 3239 cbfunc = zvol_create_cb; 3240 break; 3241 3242 default: 3243 cbfunc = NULL; 3244 break; 3245 } 3246 if (strchr(fsname, '@') || 3247 strchr(fsname, '%')) 3248 return (SET_ERROR(EINVAL)); 3249 3250 zct.zct_props = nvprops; 3251 3252 if (cbfunc == NULL) 3253 return (SET_ERROR(EINVAL)); 3254 3255 if (type == DMU_OST_ZVOL) { 3256 uint64_t volsize, volblocksize; 3257 3258 if (nvprops == NULL) 3259 return (SET_ERROR(EINVAL)); 3260 if (nvlist_lookup_uint64(nvprops, 3261 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0) 3262 return (SET_ERROR(EINVAL)); 3263 3264 if ((error = nvlist_lookup_uint64(nvprops, 3265 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3266 &volblocksize)) != 0 && error != ENOENT) 3267 return (SET_ERROR(EINVAL)); 3268 3269 if (error != 0) 3270 volblocksize = zfs_prop_default_numeric( 3271 ZFS_PROP_VOLBLOCKSIZE); 3272 3273 if ((error = zvol_check_volblocksize( 3274 volblocksize)) != 0 || 3275 (error = zvol_check_volsize(volsize, 3276 volblocksize)) != 0) 3277 return (error); 3278 } else if (type == DMU_OST_ZFS) { 3279 int error; 3280 3281 /* 3282 * We have to have normalization and 3283 * case-folding flags correct when we do the 3284 * file system creation, so go figure them out 3285 * now. 3286 */ 3287 VERIFY(nvlist_alloc(&zct.zct_zplprops, 3288 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3289 error = zfs_fill_zplprops(fsname, nvprops, 3290 zct.zct_zplprops, &is_insensitive); 3291 if (error != 0) { 3292 nvlist_free(zct.zct_zplprops); 3293 return (error); 3294 } 3295 } 3296 3297 error = dmu_objset_create(fsname, type, 3298 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); 3299 nvlist_free(zct.zct_zplprops); 3300 3301 /* 3302 * It would be nice to do this atomically. 3303 */ 3304 if (error == 0) { 3305 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3306 nvprops, outnvl); 3307 if (error != 0) 3308 (void) dsl_destroy_head(fsname); 3309 } 3310#ifdef __FreeBSD__ 3311 if (error == 0 && type == DMU_OST_ZVOL) 3312 zvol_create_minors(fsname); 3313#endif 3314 return (error); 3315} 3316 3317/* 3318 * innvl: { 3319 * "origin" -> name of origin snapshot 3320 * (optional) "props" -> { prop -> value } 3321 * } 3322 * 3323 * outnvl: propname -> error code (int32) 3324 */ 3325static int 3326zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3327{ 3328 int error = 0; 3329 nvlist_t *nvprops = NULL; 3330 char *origin_name; 3331 3332 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0) 3333 return (SET_ERROR(EINVAL)); 3334 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); 3335 3336 if (strchr(fsname, '@') || 3337 strchr(fsname, '%')) 3338 return (SET_ERROR(EINVAL)); 3339 3340 if (dataset_namecheck(origin_name, NULL, NULL) != 0) 3341 return (SET_ERROR(EINVAL)); 3342 error = dmu_objset_clone(fsname, origin_name); 3343 if (error != 0) 3344 return (error); 3345 3346 /* 3347 * It would be nice to do this atomically. 3348 */ 3349 if (error == 0) { 3350 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, 3351 nvprops, outnvl); 3352 if (error != 0) 3353 (void) dsl_destroy_head(fsname); 3354 } 3355 return (error); 3356} 3357 3358/* 3359 * innvl: { 3360 * "snaps" -> { snapshot1, snapshot2 } 3361 * (optional) "props" -> { prop -> value (string) } 3362 * } 3363 * 3364 * outnvl: snapshot -> error code (int32) 3365 */ 3366static int 3367zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3368{ 3369 nvlist_t *snaps; 3370 nvlist_t *props = NULL; 3371 int error, poollen; 3372 nvpair_t *pair; 3373 3374 (void) nvlist_lookup_nvlist(innvl, "props", &props); 3375 if ((error = zfs_check_userprops(poolname, props)) != 0) 3376 return (error); 3377 3378 if (!nvlist_empty(props) && 3379 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS)) 3380 return (SET_ERROR(ENOTSUP)); 3381 3382 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3383 return (SET_ERROR(EINVAL)); 3384 poollen = strlen(poolname); 3385 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3386 pair = nvlist_next_nvpair(snaps, pair)) { 3387 const char *name = nvpair_name(pair); 3388 const char *cp = strchr(name, '@'); 3389 3390 /* 3391 * The snap name must contain an @, and the part after it must 3392 * contain only valid characters. 3393 */ 3394 if (cp == NULL || 3395 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3396 return (SET_ERROR(EINVAL)); 3397 3398 /* 3399 * The snap must be in the specified pool. 3400 */ 3401 if (strncmp(name, poolname, poollen) != 0 || 3402 (name[poollen] != '/' && name[poollen] != '@')) 3403 return (SET_ERROR(EXDEV)); 3404 3405 /* This must be the only snap of this fs. */ 3406 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair); 3407 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) { 3408 if (strncmp(name, nvpair_name(pair2), cp - name + 1) 3409 == 0) { 3410 return (SET_ERROR(EXDEV)); 3411 } 3412 } 3413 } 3414 3415 error = dsl_dataset_snapshot(snaps, props, outnvl); 3416 return (error); 3417} 3418 3419/* 3420 * innvl: "message" -> string 3421 */ 3422/* ARGSUSED */ 3423static int 3424zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl) 3425{ 3426 char *message; 3427 spa_t *spa; 3428 int error; 3429 char *poolname; 3430 3431 /* 3432 * The poolname in the ioctl is not set, we get it from the TSD, 3433 * which was set at the end of the last successful ioctl that allows 3434 * logging. The secpolicy func already checked that it is set. 3435 * Only one log ioctl is allowed after each successful ioctl, so 3436 * we clear the TSD here. 3437 */ 3438 poolname = tsd_get(zfs_allow_log_key); 3439 (void) tsd_set(zfs_allow_log_key, NULL); 3440 error = spa_open(poolname, &spa, FTAG); 3441 strfree(poolname); 3442 if (error != 0) 3443 return (error); 3444 3445 if (nvlist_lookup_string(innvl, "message", &message) != 0) { 3446 spa_close(spa, FTAG); 3447 return (SET_ERROR(EINVAL)); 3448 } 3449 3450 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { 3451 spa_close(spa, FTAG); 3452 return (SET_ERROR(ENOTSUP)); 3453 } 3454 3455 error = spa_history_log(spa, message); 3456 spa_close(spa, FTAG); 3457 return (error); 3458} 3459 3460/* 3461 * The dp_config_rwlock must not be held when calling this, because the 3462 * unmount may need to write out data. 3463 * 3464 * This function is best-effort. Callers must deal gracefully if it 3465 * remains mounted (or is remounted after this call). 3466 * 3467 * Returns 0 if the argument is not a snapshot, or it is not currently a 3468 * filesystem, or we were able to unmount it. Returns error code otherwise. 3469 */ 3470int 3471zfs_unmount_snap(const char *snapname) 3472{ 3473 vfs_t *vfsp; 3474 zfsvfs_t *zfsvfs; 3475 int err; 3476 3477 if (strchr(snapname, '@') == NULL) 3478 return (0); 3479 3480 vfsp = zfs_get_vfs(snapname); 3481 if (vfsp == NULL) 3482 return (0); 3483 3484 zfsvfs = vfsp->vfs_data; 3485 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os))); 3486 3487 err = vn_vfswlock(vfsp->vfs_vnodecovered); 3488 VFS_RELE(vfsp); 3489 if (err != 0) 3490 return (SET_ERROR(err)); 3491 3492 /* 3493 * Always force the unmount for snapshots. 3494 */ 3495 3496#ifdef illumos 3497 (void) dounmount(vfsp, MS_FORCE, kcred); 3498#else 3499 mtx_lock(&Giant); /* dounmount() */ 3500 (void) dounmount(vfsp, MS_FORCE, curthread); 3501 mtx_unlock(&Giant); /* dounmount() */ 3502#endif 3503 return (0); 3504} 3505 3506/* ARGSUSED */ 3507static int 3508zfs_unmount_snap_cb(const char *snapname, void *arg) 3509{ 3510 return (zfs_unmount_snap(snapname)); 3511} 3512 3513/* 3514 * When a clone is destroyed, its origin may also need to be destroyed, 3515 * in which case it must be unmounted. This routine will do that unmount 3516 * if necessary. 3517 */ 3518void 3519zfs_destroy_unmount_origin(const char *fsname) 3520{ 3521 int error; 3522 objset_t *os; 3523 dsl_dataset_t *ds; 3524 3525 error = dmu_objset_hold(fsname, FTAG, &os); 3526 if (error != 0) 3527 return; 3528 ds = dmu_objset_ds(os); 3529 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) { 3530 char originname[MAXNAMELEN]; 3531 dsl_dataset_name(ds->ds_prev, originname); 3532 dmu_objset_rele(os, FTAG); 3533 (void) zfs_unmount_snap(originname); 3534 } else { 3535 dmu_objset_rele(os, FTAG); 3536 } 3537} 3538 3539/* 3540 * innvl: { 3541 * "snaps" -> { snapshot1, snapshot2 } 3542 * (optional boolean) "defer" 3543 * } 3544 * 3545 * outnvl: snapshot -> error code (int32) 3546 * 3547 */ 3548/* ARGSUSED */ 3549static int 3550zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3551{ 3552 nvlist_t *snaps; 3553 nvpair_t *pair; 3554 boolean_t defer; 3555 3556 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) 3557 return (SET_ERROR(EINVAL)); 3558 defer = nvlist_exists(innvl, "defer"); 3559 3560 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; 3561 pair = nvlist_next_nvpair(snaps, pair)) { 3562 (void) zfs_unmount_snap(nvpair_name(pair)); 3563 } 3564 3565 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl)); 3566} 3567 3568/* 3569 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>. 3570 * All bookmarks must be in the same pool. 3571 * 3572 * innvl: { 3573 * bookmark1 -> snapshot1, bookmark2 -> snapshot2 3574 * } 3575 * 3576 * outnvl: bookmark -> error code (int32) 3577 * 3578 */ 3579/* ARGSUSED */ 3580static int 3581zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) 3582{ 3583 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3584 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3585 char *snap_name; 3586 3587 /* 3588 * Verify the snapshot argument. 3589 */ 3590 if (nvpair_value_string(pair, &snap_name) != 0) 3591 return (SET_ERROR(EINVAL)); 3592 3593 3594 /* Verify that the keys (bookmarks) are unique */ 3595 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair); 3596 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) { 3597 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0) 3598 return (SET_ERROR(EINVAL)); 3599 } 3600 } 3601 3602 return (dsl_bookmark_create(innvl, outnvl)); 3603} 3604 3605/* 3606 * innvl: { 3607 * property 1, property 2, ... 3608 * } 3609 * 3610 * outnvl: { 3611 * bookmark name 1 -> { property 1, property 2, ... }, 3612 * bookmark name 2 -> { property 1, property 2, ... } 3613 * } 3614 * 3615 */ 3616static int 3617zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) 3618{ 3619 return (dsl_get_bookmarks(fsname, innvl, outnvl)); 3620} 3621 3622/* 3623 * innvl: { 3624 * bookmark name 1, bookmark name 2 3625 * } 3626 * 3627 * outnvl: bookmark -> error code (int32) 3628 * 3629 */ 3630static int 3631zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl, 3632 nvlist_t *outnvl) 3633{ 3634 int error, poollen; 3635 3636 poollen = strlen(poolname); 3637 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); 3638 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { 3639 const char *name = nvpair_name(pair); 3640 const char *cp = strchr(name, '#'); 3641 3642 /* 3643 * The bookmark name must contain an #, and the part after it 3644 * must contain only valid characters. 3645 */ 3646 if (cp == NULL || 3647 zfs_component_namecheck(cp + 1, NULL, NULL) != 0) 3648 return (SET_ERROR(EINVAL)); 3649 3650 /* 3651 * The bookmark must be in the specified pool. 3652 */ 3653 if (strncmp(name, poolname, poollen) != 0 || 3654 (name[poollen] != '/' && name[poollen] != '#')) 3655 return (SET_ERROR(EXDEV)); 3656 (void) zvol_remove_minor(name); 3657 } 3658 3659 error = dsl_bookmark_destroy(innvl, outnvl); 3660 return (error); 3661} 3662 3663/* 3664 * inputs: 3665 * zc_name name of dataset to destroy 3666 * zc_objset_type type of objset 3667 * zc_defer_destroy mark for deferred destroy 3668 * 3669 * outputs: none 3670 */ 3671static int 3672zfs_ioc_destroy(zfs_cmd_t *zc) 3673{ 3674 int err; 3675 3676 if (zc->zc_objset_type == DMU_OST_ZFS) { 3677 err = zfs_unmount_snap(zc->zc_name); 3678 if (err != 0) 3679 return (err); 3680 } 3681 3682 if (strchr(zc->zc_name, '@')) 3683 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy); 3684 else 3685 err = dsl_destroy_head(zc->zc_name); 3686 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) 3687 (void) zvol_remove_minor(zc->zc_name); 3688 return (err); 3689} 3690 3691/* 3692 * fsname is name of dataset to rollback (to most recent snapshot) 3693 * 3694 * innvl is not used. 3695 * 3696 * outnvl: "target" -> name of most recent snapshot 3697 * } 3698 */ 3699/* ARGSUSED */ 3700static int 3701zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl) 3702{ 3703 zfsvfs_t *zfsvfs; 3704 int error; 3705 3706 if (getzfsvfs(fsname, &zfsvfs) == 0) { 3707 error = zfs_suspend_fs(zfsvfs); 3708 if (error == 0) { 3709 int resume_err; 3710 3711 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl); 3712 resume_err = zfs_resume_fs(zfsvfs, fsname); 3713 error = error ? error : resume_err; 3714 } 3715 VFS_RELE(zfsvfs->z_vfs); 3716 } else { 3717 error = dsl_dataset_rollback(fsname, NULL, outnvl); 3718 } 3719 return (error); 3720} 3721 3722static int 3723recursive_unmount(const char *fsname, void *arg) 3724{ 3725 const char *snapname = arg; 3726 char fullname[MAXNAMELEN]; 3727 3728 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname); 3729 return (zfs_unmount_snap(fullname)); 3730} 3731 3732/* 3733 * inputs: 3734 * zc_name old name of dataset 3735 * zc_value new name of dataset 3736 * zc_cookie recursive flag (only valid for snapshots) 3737 * 3738 * outputs: none 3739 */ 3740static int 3741zfs_ioc_rename(zfs_cmd_t *zc) 3742{ 3743 boolean_t recursive = zc->zc_cookie & 1; 3744#ifdef __FreeBSD__ 3745 boolean_t allow_mounted = zc->zc_cookie & 2; 3746#endif 3747 char *at; 3748 3749 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; 3750 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 3751 strchr(zc->zc_value, '%')) 3752 return (SET_ERROR(EINVAL)); 3753 3754 at = strchr(zc->zc_name, '@'); 3755 if (at != NULL) { 3756 /* snaps must be in same fs */ 3757 int error; 3758 3759 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1)) 3760 return (SET_ERROR(EXDEV)); 3761 *at = '\0'; 3762#ifdef illumos 3763 if (zc->zc_objset_type == DMU_OST_ZFS) { 3764#else 3765 if (zc->zc_objset_type == DMU_OST_ZFS && allow_mounted) { 3766#endif 3767 error = dmu_objset_find(zc->zc_name, 3768 recursive_unmount, at + 1, 3769 recursive ? DS_FIND_CHILDREN : 0); 3770 if (error != 0) { 3771 *at = '@'; 3772 return (error); 3773 } 3774 } 3775 error = dsl_dataset_rename_snapshot(zc->zc_name, 3776 at + 1, strchr(zc->zc_value, '@') + 1, recursive); 3777 *at = '@'; 3778 3779 return (error); 3780 } else { 3781#ifdef illumos 3782 if (zc->zc_objset_type == DMU_OST_ZVOL) 3783 (void) zvol_remove_minor(zc->zc_name); 3784#endif 3785 return (dsl_dir_rename(zc->zc_name, zc->zc_value)); 3786 } 3787} 3788 3789static int 3790zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) 3791{ 3792 const char *propname = nvpair_name(pair); 3793 boolean_t issnap = (strchr(dsname, '@') != NULL); 3794 zfs_prop_t prop = zfs_name_to_prop(propname); 3795 uint64_t intval; 3796 int err; 3797 3798 if (prop == ZPROP_INVAL) { 3799 if (zfs_prop_user(propname)) { 3800 if (err = zfs_secpolicy_write_perms(dsname, 3801 ZFS_DELEG_PERM_USERPROP, cr)) 3802 return (err); 3803 return (0); 3804 } 3805 3806 if (!issnap && zfs_prop_userquota(propname)) { 3807 const char *perm = NULL; 3808 const char *uq_prefix = 3809 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; 3810 const char *gq_prefix = 3811 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; 3812 3813 if (strncmp(propname, uq_prefix, 3814 strlen(uq_prefix)) == 0) { 3815 perm = ZFS_DELEG_PERM_USERQUOTA; 3816 } else if (strncmp(propname, gq_prefix, 3817 strlen(gq_prefix)) == 0) { 3818 perm = ZFS_DELEG_PERM_GROUPQUOTA; 3819 } else { 3820 /* USERUSED and GROUPUSED are read-only */ 3821 return (SET_ERROR(EINVAL)); 3822 } 3823 3824 if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) 3825 return (err); 3826 return (0); 3827 } 3828 3829 return (SET_ERROR(EINVAL)); 3830 } 3831 3832 if (issnap) 3833 return (SET_ERROR(EINVAL)); 3834 3835 if (nvpair_type(pair) == DATA_TYPE_NVLIST) { 3836 /* 3837 * dsl_prop_get_all_impl() returns properties in this 3838 * format. 3839 */ 3840 nvlist_t *attrs; 3841 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); 3842 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 3843 &pair) == 0); 3844 } 3845 3846 /* 3847 * Check that this value is valid for this pool version 3848 */ 3849 switch (prop) { 3850 case ZFS_PROP_COMPRESSION: 3851 /* 3852 * If the user specified gzip compression, make sure 3853 * the SPA supports it. We ignore any errors here since 3854 * we'll catch them later. 3855 */ 3856 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3857 nvpair_value_uint64(pair, &intval) == 0) { 3858 if (intval >= ZIO_COMPRESS_GZIP_1 && 3859 intval <= ZIO_COMPRESS_GZIP_9 && 3860 zfs_earlier_version(dsname, 3861 SPA_VERSION_GZIP_COMPRESSION)) { 3862 return (SET_ERROR(ENOTSUP)); 3863 } 3864 3865 if (intval == ZIO_COMPRESS_ZLE && 3866 zfs_earlier_version(dsname, 3867 SPA_VERSION_ZLE_COMPRESSION)) 3868 return (SET_ERROR(ENOTSUP)); 3869 3870 if (intval == ZIO_COMPRESS_LZ4) { 3871 spa_t *spa; 3872 3873 if ((err = spa_open(dsname, &spa, FTAG)) != 0) 3874 return (err); 3875 3876 if (!spa_feature_is_enabled(spa, 3877 SPA_FEATURE_LZ4_COMPRESS)) { 3878 spa_close(spa, FTAG); 3879 return (SET_ERROR(ENOTSUP)); 3880 } 3881 spa_close(spa, FTAG); 3882 } 3883 3884 /* 3885 * If this is a bootable dataset then 3886 * verify that the compression algorithm 3887 * is supported for booting. We must return 3888 * something other than ENOTSUP since it 3889 * implies a downrev pool version. 3890 */ 3891 if (zfs_is_bootfs(dsname) && 3892 !BOOTFS_COMPRESS_VALID(intval)) { 3893 return (SET_ERROR(ERANGE)); 3894 } 3895 } 3896 break; 3897 3898 case ZFS_PROP_COPIES: 3899 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) 3900 return (SET_ERROR(ENOTSUP)); 3901 break; 3902 3903 case ZFS_PROP_DEDUP: 3904 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) 3905 return (SET_ERROR(ENOTSUP)); 3906 break; 3907 3908 case ZFS_PROP_SHARESMB: 3909 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) 3910 return (SET_ERROR(ENOTSUP)); 3911 break; 3912 3913 case ZFS_PROP_ACLINHERIT: 3914 if (nvpair_type(pair) == DATA_TYPE_UINT64 && 3915 nvpair_value_uint64(pair, &intval) == 0) { 3916 if (intval == ZFS_ACL_PASSTHROUGH_X && 3917 zfs_earlier_version(dsname, 3918 SPA_VERSION_PASSTHROUGH_X)) 3919 return (SET_ERROR(ENOTSUP)); 3920 } 3921 break; 3922 } 3923 3924 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); 3925} 3926 3927/* 3928 * Checks for a race condition to make sure we don't increment a feature flag 3929 * multiple times. 3930 */ 3931static int 3932zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx) 3933{ 3934 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3935 spa_feature_t *featurep = arg; 3936 3937 if (!spa_feature_is_active(spa, *featurep)) 3938 return (0); 3939 else 3940 return (SET_ERROR(EBUSY)); 3941} 3942 3943/* 3944 * The callback invoked on feature activation in the sync task caused by 3945 * zfs_prop_activate_feature. 3946 */ 3947static void 3948zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx) 3949{ 3950 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 3951 spa_feature_t *featurep = arg; 3952 3953 spa_feature_incr(spa, *featurep, tx); 3954} 3955 3956/* 3957 * Activates a feature on a pool in response to a property setting. This 3958 * creates a new sync task which modifies the pool to reflect the feature 3959 * as being active. 3960 */ 3961static int 3962zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature) 3963{ 3964 int err; 3965 3966 /* EBUSY here indicates that the feature is already active */ 3967 err = dsl_sync_task(spa_name(spa), 3968 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync, 3969 &feature, 2); 3970 3971 if (err != 0 && err != EBUSY) 3972 return (err); 3973 else 3974 return (0); 3975} 3976 3977/* 3978 * Removes properties from the given props list that fail permission checks 3979 * needed to clear them and to restore them in case of a receive error. For each 3980 * property, make sure we have both set and inherit permissions. 3981 * 3982 * Returns the first error encountered if any permission checks fail. If the 3983 * caller provides a non-NULL errlist, it also gives the complete list of names 3984 * of all the properties that failed a permission check along with the 3985 * corresponding error numbers. The caller is responsible for freeing the 3986 * returned errlist. 3987 * 3988 * If every property checks out successfully, zero is returned and the list 3989 * pointed at by errlist is NULL. 3990 */ 3991static int 3992zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) 3993{ 3994 zfs_cmd_t *zc; 3995 nvpair_t *pair, *next_pair; 3996 nvlist_t *errors; 3997 int err, rv = 0; 3998 3999 if (props == NULL) 4000 return (0); 4001 4002 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4003 4004 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); 4005 (void) strcpy(zc->zc_name, dataset); 4006 pair = nvlist_next_nvpair(props, NULL); 4007 while (pair != NULL) { 4008 next_pair = nvlist_next_nvpair(props, pair); 4009 4010 (void) strcpy(zc->zc_value, nvpair_name(pair)); 4011 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || 4012 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) { 4013 VERIFY(nvlist_remove_nvpair(props, pair) == 0); 4014 VERIFY(nvlist_add_int32(errors, 4015 zc->zc_value, err) == 0); 4016 } 4017 pair = next_pair; 4018 } 4019 kmem_free(zc, sizeof (zfs_cmd_t)); 4020 4021 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { 4022 nvlist_free(errors); 4023 errors = NULL; 4024 } else { 4025 VERIFY(nvpair_value_int32(pair, &rv) == 0); 4026 } 4027 4028 if (errlist == NULL) 4029 nvlist_free(errors); 4030 else 4031 *errlist = errors; 4032 4033 return (rv); 4034} 4035 4036static boolean_t 4037propval_equals(nvpair_t *p1, nvpair_t *p2) 4038{ 4039 if (nvpair_type(p1) == DATA_TYPE_NVLIST) { 4040 /* dsl_prop_get_all_impl() format */ 4041 nvlist_t *attrs; 4042 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); 4043 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4044 &p1) == 0); 4045 } 4046 4047 if (nvpair_type(p2) == DATA_TYPE_NVLIST) { 4048 nvlist_t *attrs; 4049 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); 4050 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, 4051 &p2) == 0); 4052 } 4053 4054 if (nvpair_type(p1) != nvpair_type(p2)) 4055 return (B_FALSE); 4056 4057 if (nvpair_type(p1) == DATA_TYPE_STRING) { 4058 char *valstr1, *valstr2; 4059 4060 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); 4061 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); 4062 return (strcmp(valstr1, valstr2) == 0); 4063 } else { 4064 uint64_t intval1, intval2; 4065 4066 VERIFY(nvpair_value_uint64(p1, &intval1) == 0); 4067 VERIFY(nvpair_value_uint64(p2, &intval2) == 0); 4068 return (intval1 == intval2); 4069 } 4070} 4071 4072/* 4073 * Remove properties from props if they are not going to change (as determined 4074 * by comparison with origprops). Remove them from origprops as well, since we 4075 * do not need to clear or restore properties that won't change. 4076 */ 4077static void 4078props_reduce(nvlist_t *props, nvlist_t *origprops) 4079{ 4080 nvpair_t *pair, *next_pair; 4081 4082 if (origprops == NULL) 4083 return; /* all props need to be received */ 4084 4085 pair = nvlist_next_nvpair(props, NULL); 4086 while (pair != NULL) { 4087 const char *propname = nvpair_name(pair); 4088 nvpair_t *match; 4089 4090 next_pair = nvlist_next_nvpair(props, pair); 4091 4092 if ((nvlist_lookup_nvpair(origprops, propname, 4093 &match) != 0) || !propval_equals(pair, match)) 4094 goto next; /* need to set received value */ 4095 4096 /* don't clear the existing received value */ 4097 (void) nvlist_remove_nvpair(origprops, match); 4098 /* don't bother receiving the property */ 4099 (void) nvlist_remove_nvpair(props, pair); 4100next: 4101 pair = next_pair; 4102 } 4103} 4104 4105#ifdef DEBUG 4106static boolean_t zfs_ioc_recv_inject_err; 4107#endif 4108 4109/* 4110 * inputs: 4111 * zc_name name of containing filesystem 4112 * zc_nvlist_src{_size} nvlist of properties to apply 4113 * zc_value name of snapshot to create 4114 * zc_string name of clone origin (if DRR_FLAG_CLONE) 4115 * zc_cookie file descriptor to recv from 4116 * zc_begin_record the BEGIN record of the stream (not byteswapped) 4117 * zc_guid force flag 4118 * zc_cleanup_fd cleanup-on-exit file descriptor 4119 * zc_action_handle handle for this guid/ds mapping (or zero on first call) 4120 * 4121 * outputs: 4122 * zc_cookie number of bytes read 4123 * zc_nvlist_dst{_size} error for each unapplied received property 4124 * zc_obj zprop_errflags_t 4125 * zc_action_handle handle for this guid/ds mapping 4126 */ 4127static int 4128zfs_ioc_recv(zfs_cmd_t *zc) 4129{ 4130 file_t *fp; 4131 dmu_recv_cookie_t drc; 4132 boolean_t force = (boolean_t)zc->zc_guid; 4133 int fd; 4134 int error = 0; 4135 int props_error = 0; 4136 nvlist_t *errors; 4137 offset_t off; 4138 nvlist_t *props = NULL; /* sent properties */ 4139 nvlist_t *origprops = NULL; /* existing properties */ 4140 char *origin = NULL; 4141 char *tosnap; 4142 char tofs[ZFS_MAXNAMELEN]; 4143 cap_rights_t rights; 4144 boolean_t first_recvd_props = B_FALSE; 4145 4146 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || 4147 strchr(zc->zc_value, '@') == NULL || 4148 strchr(zc->zc_value, '%')) 4149 return (SET_ERROR(EINVAL)); 4150 4151 (void) strcpy(tofs, zc->zc_value); 4152 tosnap = strchr(tofs, '@'); 4153 *tosnap++ = '\0'; 4154 4155 if (zc->zc_nvlist_src != 0 && 4156 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 4157 zc->zc_iflags, &props)) != 0) 4158 return (error); 4159 4160 fd = zc->zc_cookie; 4161 fp = getf(fd, cap_rights_init(&rights, CAP_PREAD)); 4162 if (fp == NULL) { 4163 nvlist_free(props); 4164 return (SET_ERROR(EBADF)); 4165 } 4166 4167 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4168 4169 if (zc->zc_string[0]) 4170 origin = zc->zc_string; 4171 4172 error = dmu_recv_begin(tofs, tosnap, 4173 &zc->zc_begin_record, force, origin, &drc); 4174 if (error != 0) 4175 goto out; 4176 4177 /* 4178 * Set properties before we receive the stream so that they are applied 4179 * to the new data. Note that we must call dmu_recv_stream() if 4180 * dmu_recv_begin() succeeds. 4181 */ 4182 if (props != NULL && !drc.drc_newfs) { 4183 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >= 4184 SPA_VERSION_RECVD_PROPS && 4185 !dsl_prop_get_hasrecvd(tofs)) 4186 first_recvd_props = B_TRUE; 4187 4188 /* 4189 * If new received properties are supplied, they are to 4190 * completely replace the existing received properties, so stash 4191 * away the existing ones. 4192 */ 4193 if (dsl_prop_get_received(tofs, &origprops) == 0) { 4194 nvlist_t *errlist = NULL; 4195 /* 4196 * Don't bother writing a property if its value won't 4197 * change (and avoid the unnecessary security checks). 4198 * 4199 * The first receive after SPA_VERSION_RECVD_PROPS is a 4200 * special case where we blow away all local properties 4201 * regardless. 4202 */ 4203 if (!first_recvd_props) 4204 props_reduce(props, origprops); 4205 if (zfs_check_clearable(tofs, origprops, &errlist) != 0) 4206 (void) nvlist_merge(errors, errlist, 0); 4207 nvlist_free(errlist); 4208 4209 if (clear_received_props(tofs, origprops, 4210 first_recvd_props ? NULL : props) != 0) 4211 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4212 } else { 4213 zc->zc_obj |= ZPROP_ERR_NOCLEAR; 4214 } 4215 } 4216 4217 if (props != NULL) { 4218 props_error = dsl_prop_set_hasrecvd(tofs); 4219 4220 if (props_error == 0) { 4221 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, 4222 props, errors); 4223 } 4224 } 4225 4226 if (zc->zc_nvlist_dst_size != 0 && 4227 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 || 4228 put_nvlist(zc, errors) != 0)) { 4229 /* 4230 * Caller made zc->zc_nvlist_dst less than the minimum expected 4231 * size or supplied an invalid address. 4232 */ 4233 props_error = SET_ERROR(EINVAL); 4234 } 4235 4236 off = fp->f_offset; 4237 error = dmu_recv_stream(&drc, fp, &off, zc->zc_cleanup_fd, 4238 &zc->zc_action_handle); 4239 4240 if (error == 0) { 4241 zfsvfs_t *zfsvfs = NULL; 4242 4243 if (getzfsvfs(tofs, &zfsvfs) == 0) { 4244 /* online recv */ 4245 int end_err; 4246 4247 error = zfs_suspend_fs(zfsvfs); 4248 /* 4249 * If the suspend fails, then the recv_end will 4250 * likely also fail, and clean up after itself. 4251 */ 4252 end_err = dmu_recv_end(&drc, zfsvfs); 4253 if (error == 0) 4254 error = zfs_resume_fs(zfsvfs, tofs); 4255 error = error ? error : end_err; 4256 VFS_RELE(zfsvfs->z_vfs); 4257 } else { 4258 error = dmu_recv_end(&drc, NULL); 4259 } 4260 } 4261 4262 zc->zc_cookie = off - fp->f_offset; 4263 if (off >= 0 && off <= MAXOFFSET_T) 4264 fp->f_offset = off; 4265 4266#ifdef DEBUG 4267 if (zfs_ioc_recv_inject_err) { 4268 zfs_ioc_recv_inject_err = B_FALSE; 4269 error = 1; 4270 } 4271#endif 4272 4273#ifdef __FreeBSD__ 4274 if (error == 0) 4275 zvol_create_minors(tofs); 4276#endif 4277 4278 /* 4279 * On error, restore the original props. 4280 */ 4281 if (error != 0 && props != NULL && !drc.drc_newfs) { 4282 if (clear_received_props(tofs, props, NULL) != 0) { 4283 /* 4284 * We failed to clear the received properties. 4285 * Since we may have left a $recvd value on the 4286 * system, we can't clear the $hasrecvd flag. 4287 */ 4288 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4289 } else if (first_recvd_props) { 4290 dsl_prop_unset_hasrecvd(tofs); 4291 } 4292 4293 if (origprops == NULL && !drc.drc_newfs) { 4294 /* We failed to stash the original properties. */ 4295 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4296 } 4297 4298 /* 4299 * dsl_props_set() will not convert RECEIVED to LOCAL on or 4300 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL 4301 * explictly if we're restoring local properties cleared in the 4302 * first new-style receive. 4303 */ 4304 if (origprops != NULL && 4305 zfs_set_prop_nvlist(tofs, (first_recvd_props ? 4306 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), 4307 origprops, NULL) != 0) { 4308 /* 4309 * We stashed the original properties but failed to 4310 * restore them. 4311 */ 4312 zc->zc_obj |= ZPROP_ERR_NORESTORE; 4313 } 4314 } 4315out: 4316 nvlist_free(props); 4317 nvlist_free(origprops); 4318 nvlist_free(errors); 4319 releasef(fd); 4320 4321 if (error == 0) 4322 error = props_error; 4323 4324 return (error); 4325} 4326 4327/* 4328 * inputs: 4329 * zc_name name of snapshot to send 4330 * zc_cookie file descriptor to send stream to 4331 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj) 4332 * zc_sendobj objsetid of snapshot to send 4333 * zc_fromobj objsetid of incremental fromsnap (may be zero) 4334 * zc_guid if set, estimate size of stream only. zc_cookie is ignored. 4335 * output size in zc_objset_type. 4336 * 4337 * outputs: 4338 * zc_objset_type estimated size, if zc_guid is set 4339 */ 4340static int 4341zfs_ioc_send(zfs_cmd_t *zc) 4342{ 4343 int error; 4344 offset_t off; 4345 boolean_t estimate = (zc->zc_guid != 0); 4346 4347 if (zc->zc_obj != 0) { 4348 dsl_pool_t *dp; 4349 dsl_dataset_t *tosnap; 4350 4351 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4352 if (error != 0) 4353 return (error); 4354 4355 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4356 if (error != 0) { 4357 dsl_pool_rele(dp, FTAG); 4358 return (error); 4359 } 4360 4361 if (dsl_dir_is_clone(tosnap->ds_dir)) 4362 zc->zc_fromobj = tosnap->ds_dir->dd_phys->dd_origin_obj; 4363 dsl_dataset_rele(tosnap, FTAG); 4364 dsl_pool_rele(dp, FTAG); 4365 } 4366 4367 if (estimate) { 4368 dsl_pool_t *dp; 4369 dsl_dataset_t *tosnap; 4370 dsl_dataset_t *fromsnap = NULL; 4371 4372 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4373 if (error != 0) 4374 return (error); 4375 4376 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); 4377 if (error != 0) { 4378 dsl_pool_rele(dp, FTAG); 4379 return (error); 4380 } 4381 4382 if (zc->zc_fromobj != 0) { 4383 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, 4384 FTAG, &fromsnap); 4385 if (error != 0) { 4386 dsl_dataset_rele(tosnap, FTAG); 4387 dsl_pool_rele(dp, FTAG); 4388 return (error); 4389 } 4390 } 4391 4392 error = dmu_send_estimate(tosnap, fromsnap, 4393 &zc->zc_objset_type); 4394 4395 if (fromsnap != NULL) 4396 dsl_dataset_rele(fromsnap, FTAG); 4397 dsl_dataset_rele(tosnap, FTAG); 4398 dsl_pool_rele(dp, FTAG); 4399 } else { 4400 file_t *fp; 4401 cap_rights_t rights; 4402 4403 fp = getf(zc->zc_cookie, 4404 cap_rights_init(&rights, CAP_WRITE)); 4405 if (fp == NULL) 4406 return (SET_ERROR(EBADF)); 4407 4408 off = fp->f_offset; 4409 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj, 4410#ifdef illumos 4411 zc->zc_fromobj, zc->zc_cookie, fp->f_vnode, &off); 4412#else 4413 zc->zc_fromobj, zc->zc_cookie, fp, &off); 4414#endif 4415 4416 if (off >= 0 && off <= MAXOFFSET_T) 4417 fp->f_offset = off; 4418 releasef(zc->zc_cookie); 4419 } 4420 return (error); 4421} 4422 4423/* 4424 * inputs: 4425 * zc_name name of snapshot on which to report progress 4426 * zc_cookie file descriptor of send stream 4427 * 4428 * outputs: 4429 * zc_cookie number of bytes written in send stream thus far 4430 */ 4431static int 4432zfs_ioc_send_progress(zfs_cmd_t *zc) 4433{ 4434 dsl_pool_t *dp; 4435 dsl_dataset_t *ds; 4436 dmu_sendarg_t *dsp = NULL; 4437 int error; 4438 4439 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 4440 if (error != 0) 4441 return (error); 4442 4443 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds); 4444 if (error != 0) { 4445 dsl_pool_rele(dp, FTAG); 4446 return (error); 4447 } 4448 4449 mutex_enter(&ds->ds_sendstream_lock); 4450 4451 /* 4452 * Iterate over all the send streams currently active on this dataset. 4453 * If there's one which matches the specified file descriptor _and_ the 4454 * stream was started by the current process, return the progress of 4455 * that stream. 4456 */ 4457 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL; 4458 dsp = list_next(&ds->ds_sendstreams, dsp)) { 4459 if (dsp->dsa_outfd == zc->zc_cookie && 4460 dsp->dsa_proc == curproc) 4461 break; 4462 } 4463 4464 if (dsp != NULL) 4465 zc->zc_cookie = *(dsp->dsa_off); 4466 else 4467 error = SET_ERROR(ENOENT); 4468 4469 mutex_exit(&ds->ds_sendstream_lock); 4470 dsl_dataset_rele(ds, FTAG); 4471 dsl_pool_rele(dp, FTAG); 4472 return (error); 4473} 4474 4475static int 4476zfs_ioc_inject_fault(zfs_cmd_t *zc) 4477{ 4478 int id, error; 4479 4480 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, 4481 &zc->zc_inject_record); 4482 4483 if (error == 0) 4484 zc->zc_guid = (uint64_t)id; 4485 4486 return (error); 4487} 4488 4489static int 4490zfs_ioc_clear_fault(zfs_cmd_t *zc) 4491{ 4492 return (zio_clear_fault((int)zc->zc_guid)); 4493} 4494 4495static int 4496zfs_ioc_inject_list_next(zfs_cmd_t *zc) 4497{ 4498 int id = (int)zc->zc_guid; 4499 int error; 4500 4501 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), 4502 &zc->zc_inject_record); 4503 4504 zc->zc_guid = id; 4505 4506 return (error); 4507} 4508 4509static int 4510zfs_ioc_error_log(zfs_cmd_t *zc) 4511{ 4512 spa_t *spa; 4513 int error; 4514 size_t count = (size_t)zc->zc_nvlist_dst_size; 4515 4516 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) 4517 return (error); 4518 4519 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, 4520 &count); 4521 if (error == 0) 4522 zc->zc_nvlist_dst_size = count; 4523 else 4524 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); 4525 4526 spa_close(spa, FTAG); 4527 4528 return (error); 4529} 4530 4531static int 4532zfs_ioc_clear(zfs_cmd_t *zc) 4533{ 4534 spa_t *spa; 4535 vdev_t *vd; 4536 int error; 4537 4538 /* 4539 * On zpool clear we also fix up missing slogs 4540 */ 4541 mutex_enter(&spa_namespace_lock); 4542 spa = spa_lookup(zc->zc_name); 4543 if (spa == NULL) { 4544 mutex_exit(&spa_namespace_lock); 4545 return (SET_ERROR(EIO)); 4546 } 4547 if (spa_get_log_state(spa) == SPA_LOG_MISSING) { 4548 /* we need to let spa_open/spa_load clear the chains */ 4549 spa_set_log_state(spa, SPA_LOG_CLEAR); 4550 } 4551 spa->spa_last_open_failed = 0; 4552 mutex_exit(&spa_namespace_lock); 4553 4554 if (zc->zc_cookie & ZPOOL_NO_REWIND) { 4555 error = spa_open(zc->zc_name, &spa, FTAG); 4556 } else { 4557 nvlist_t *policy; 4558 nvlist_t *config = NULL; 4559 4560 if (zc->zc_nvlist_src == 0) 4561 return (SET_ERROR(EINVAL)); 4562 4563 if ((error = get_nvlist(zc->zc_nvlist_src, 4564 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { 4565 error = spa_open_rewind(zc->zc_name, &spa, FTAG, 4566 policy, &config); 4567 if (config != NULL) { 4568 int err; 4569 4570 if ((err = put_nvlist(zc, config)) != 0) 4571 error = err; 4572 nvlist_free(config); 4573 } 4574 nvlist_free(policy); 4575 } 4576 } 4577 4578 if (error != 0) 4579 return (error); 4580 4581 spa_vdev_state_enter(spa, SCL_NONE); 4582 4583 if (zc->zc_guid == 0) { 4584 vd = NULL; 4585 } else { 4586 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); 4587 if (vd == NULL) { 4588 (void) spa_vdev_state_exit(spa, NULL, ENODEV); 4589 spa_close(spa, FTAG); 4590 return (SET_ERROR(ENODEV)); 4591 } 4592 } 4593 4594 vdev_clear(spa, vd); 4595 4596 (void) spa_vdev_state_exit(spa, NULL, 0); 4597 4598 /* 4599 * Resume any suspended I/Os. 4600 */ 4601 if (zio_resume(spa) != 0) 4602 error = SET_ERROR(EIO); 4603 4604 spa_close(spa, FTAG); 4605 4606 return (error); 4607} 4608 4609static int 4610zfs_ioc_pool_reopen(zfs_cmd_t *zc) 4611{ 4612 spa_t *spa; 4613 int error; 4614 4615 error = spa_open(zc->zc_name, &spa, FTAG); 4616 if (error != 0) 4617 return (error); 4618 4619 spa_vdev_state_enter(spa, SCL_NONE); 4620 4621 /* 4622 * If a resilver is already in progress then set the 4623 * spa_scrub_reopen flag to B_TRUE so that we don't restart 4624 * the scan as a side effect of the reopen. Otherwise, let 4625 * vdev_open() decided if a resilver is required. 4626 */ 4627 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool); 4628 vdev_reopen(spa->spa_root_vdev); 4629 spa->spa_scrub_reopen = B_FALSE; 4630 4631 (void) spa_vdev_state_exit(spa, NULL, 0); 4632 spa_close(spa, FTAG); 4633 return (0); 4634} 4635/* 4636 * inputs: 4637 * zc_name name of filesystem 4638 * zc_value name of origin snapshot 4639 * 4640 * outputs: 4641 * zc_string name of conflicting snapshot, if there is one 4642 */ 4643static int 4644zfs_ioc_promote(zfs_cmd_t *zc) 4645{ 4646 char *cp; 4647 4648 /* 4649 * We don't need to unmount *all* the origin fs's snapshots, but 4650 * it's easier. 4651 */ 4652 cp = strchr(zc->zc_value, '@'); 4653 if (cp) 4654 *cp = '\0'; 4655 (void) dmu_objset_find(zc->zc_value, 4656 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS); 4657 return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); 4658} 4659 4660/* 4661 * Retrieve a single {user|group}{used|quota}@... property. 4662 * 4663 * inputs: 4664 * zc_name name of filesystem 4665 * zc_objset_type zfs_userquota_prop_t 4666 * zc_value domain name (eg. "S-1-234-567-89") 4667 * zc_guid RID/UID/GID 4668 * 4669 * outputs: 4670 * zc_cookie property value 4671 */ 4672static int 4673zfs_ioc_userspace_one(zfs_cmd_t *zc) 4674{ 4675 zfsvfs_t *zfsvfs; 4676 int error; 4677 4678 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) 4679 return (SET_ERROR(EINVAL)); 4680 4681 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4682 if (error != 0) 4683 return (error); 4684 4685 error = zfs_userspace_one(zfsvfs, 4686 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); 4687 zfsvfs_rele(zfsvfs, FTAG); 4688 4689 return (error); 4690} 4691 4692/* 4693 * inputs: 4694 * zc_name name of filesystem 4695 * zc_cookie zap cursor 4696 * zc_objset_type zfs_userquota_prop_t 4697 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) 4698 * 4699 * outputs: 4700 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) 4701 * zc_cookie zap cursor 4702 */ 4703static int 4704zfs_ioc_userspace_many(zfs_cmd_t *zc) 4705{ 4706 zfsvfs_t *zfsvfs; 4707 int bufsize = zc->zc_nvlist_dst_size; 4708 4709 if (bufsize <= 0) 4710 return (SET_ERROR(ENOMEM)); 4711 4712 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); 4713 if (error != 0) 4714 return (error); 4715 4716 void *buf = kmem_alloc(bufsize, KM_SLEEP); 4717 4718 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, 4719 buf, &zc->zc_nvlist_dst_size); 4720 4721 if (error == 0) { 4722 error = ddi_copyout(buf, 4723 (void *)(uintptr_t)zc->zc_nvlist_dst, 4724 zc->zc_nvlist_dst_size, zc->zc_iflags); 4725 } 4726 kmem_free(buf, bufsize); 4727 zfsvfs_rele(zfsvfs, FTAG); 4728 4729 return (error); 4730} 4731 4732/* 4733 * inputs: 4734 * zc_name name of filesystem 4735 * 4736 * outputs: 4737 * none 4738 */ 4739static int 4740zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) 4741{ 4742 objset_t *os; 4743 int error = 0; 4744 zfsvfs_t *zfsvfs; 4745 4746 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { 4747 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { 4748 /* 4749 * If userused is not enabled, it may be because the 4750 * objset needs to be closed & reopened (to grow the 4751 * objset_phys_t). Suspend/resume the fs will do that. 4752 */ 4753 error = zfs_suspend_fs(zfsvfs); 4754 if (error == 0) { 4755 dmu_objset_refresh_ownership(zfsvfs->z_os, 4756 zfsvfs); 4757 error = zfs_resume_fs(zfsvfs, zc->zc_name); 4758 } 4759 } 4760 if (error == 0) 4761 error = dmu_objset_userspace_upgrade(zfsvfs->z_os); 4762 VFS_RELE(zfsvfs->z_vfs); 4763 } else { 4764 /* XXX kind of reading contents without owning */ 4765 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4766 if (error != 0) 4767 return (error); 4768 4769 error = dmu_objset_userspace_upgrade(os); 4770 dmu_objset_rele(os, FTAG); 4771 } 4772 4773 return (error); 4774} 4775 4776#ifdef sun 4777/* 4778 * We don't want to have a hard dependency 4779 * against some special symbols in sharefs 4780 * nfs, and smbsrv. Determine them if needed when 4781 * the first file system is shared. 4782 * Neither sharefs, nfs or smbsrv are unloadable modules. 4783 */ 4784int (*znfsexport_fs)(void *arg); 4785int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); 4786int (*zsmbexport_fs)(void *arg, boolean_t add_share); 4787 4788int zfs_nfsshare_inited; 4789int zfs_smbshare_inited; 4790 4791ddi_modhandle_t nfs_mod; 4792ddi_modhandle_t sharefs_mod; 4793ddi_modhandle_t smbsrv_mod; 4794#endif /* sun */ 4795kmutex_t zfs_share_lock; 4796 4797#ifdef sun 4798static int 4799zfs_init_sharefs() 4800{ 4801 int error; 4802 4803 ASSERT(MUTEX_HELD(&zfs_share_lock)); 4804 /* Both NFS and SMB shares also require sharetab support. */ 4805 if (sharefs_mod == NULL && ((sharefs_mod = 4806 ddi_modopen("fs/sharefs", 4807 KRTLD_MODE_FIRST, &error)) == NULL)) { 4808 return (SET_ERROR(ENOSYS)); 4809 } 4810 if (zshare_fs == NULL && ((zshare_fs = 4811 (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) 4812 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { 4813 return (SET_ERROR(ENOSYS)); 4814 } 4815 return (0); 4816} 4817#endif /* sun */ 4818 4819static int 4820zfs_ioc_share(zfs_cmd_t *zc) 4821{ 4822#ifdef sun 4823 int error; 4824 int opcode; 4825 4826 switch (zc->zc_share.z_sharetype) { 4827 case ZFS_SHARE_NFS: 4828 case ZFS_UNSHARE_NFS: 4829 if (zfs_nfsshare_inited == 0) { 4830 mutex_enter(&zfs_share_lock); 4831 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", 4832 KRTLD_MODE_FIRST, &error)) == NULL)) { 4833 mutex_exit(&zfs_share_lock); 4834 return (SET_ERROR(ENOSYS)); 4835 } 4836 if (znfsexport_fs == NULL && 4837 ((znfsexport_fs = (int (*)(void *)) 4838 ddi_modsym(nfs_mod, 4839 "nfs_export", &error)) == NULL)) { 4840 mutex_exit(&zfs_share_lock); 4841 return (SET_ERROR(ENOSYS)); 4842 } 4843 error = zfs_init_sharefs(); 4844 if (error != 0) { 4845 mutex_exit(&zfs_share_lock); 4846 return (SET_ERROR(ENOSYS)); 4847 } 4848 zfs_nfsshare_inited = 1; 4849 mutex_exit(&zfs_share_lock); 4850 } 4851 break; 4852 case ZFS_SHARE_SMB: 4853 case ZFS_UNSHARE_SMB: 4854 if (zfs_smbshare_inited == 0) { 4855 mutex_enter(&zfs_share_lock); 4856 if (smbsrv_mod == NULL && ((smbsrv_mod = 4857 ddi_modopen("drv/smbsrv", 4858 KRTLD_MODE_FIRST, &error)) == NULL)) { 4859 mutex_exit(&zfs_share_lock); 4860 return (SET_ERROR(ENOSYS)); 4861 } 4862 if (zsmbexport_fs == NULL && ((zsmbexport_fs = 4863 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, 4864 "smb_server_share", &error)) == NULL)) { 4865 mutex_exit(&zfs_share_lock); 4866 return (SET_ERROR(ENOSYS)); 4867 } 4868 error = zfs_init_sharefs(); 4869 if (error != 0) { 4870 mutex_exit(&zfs_share_lock); 4871 return (SET_ERROR(ENOSYS)); 4872 } 4873 zfs_smbshare_inited = 1; 4874 mutex_exit(&zfs_share_lock); 4875 } 4876 break; 4877 default: 4878 return (SET_ERROR(EINVAL)); 4879 } 4880 4881 switch (zc->zc_share.z_sharetype) { 4882 case ZFS_SHARE_NFS: 4883 case ZFS_UNSHARE_NFS: 4884 if (error = 4885 znfsexport_fs((void *) 4886 (uintptr_t)zc->zc_share.z_exportdata)) 4887 return (error); 4888 break; 4889 case ZFS_SHARE_SMB: 4890 case ZFS_UNSHARE_SMB: 4891 if (error = zsmbexport_fs((void *) 4892 (uintptr_t)zc->zc_share.z_exportdata, 4893 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? 4894 B_TRUE: B_FALSE)) { 4895 return (error); 4896 } 4897 break; 4898 } 4899 4900 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || 4901 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? 4902 SHAREFS_ADD : SHAREFS_REMOVE; 4903 4904 /* 4905 * Add or remove share from sharetab 4906 */ 4907 error = zshare_fs(opcode, 4908 (void *)(uintptr_t)zc->zc_share.z_sharedata, 4909 zc->zc_share.z_sharemax); 4910 4911 return (error); 4912 4913#else /* !sun */ 4914 return (ENOSYS); 4915#endif /* !sun */ 4916} 4917 4918ace_t full_access[] = { 4919 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} 4920}; 4921 4922/* 4923 * inputs: 4924 * zc_name name of containing filesystem 4925 * zc_obj object # beyond which we want next in-use object # 4926 * 4927 * outputs: 4928 * zc_obj next in-use object # 4929 */ 4930static int 4931zfs_ioc_next_obj(zfs_cmd_t *zc) 4932{ 4933 objset_t *os = NULL; 4934 int error; 4935 4936 error = dmu_objset_hold(zc->zc_name, FTAG, &os); 4937 if (error != 0) 4938 return (error); 4939 4940 error = dmu_object_next(os, &zc->zc_obj, B_FALSE, 4941 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg); 4942 4943 dmu_objset_rele(os, FTAG); 4944 return (error); 4945} 4946 4947/* 4948 * inputs: 4949 * zc_name name of filesystem 4950 * zc_value prefix name for snapshot 4951 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process 4952 * 4953 * outputs: 4954 * zc_value short name of new snapshot 4955 */ 4956static int 4957zfs_ioc_tmp_snapshot(zfs_cmd_t *zc) 4958{ 4959 char *snap_name; 4960 char *hold_name; 4961 int error; 4962 minor_t minor; 4963 4964 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor); 4965 if (error != 0) 4966 return (error); 4967 4968 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value, 4969 (u_longlong_t)ddi_get_lbolt64()); 4970 hold_name = kmem_asprintf("%%%s", zc->zc_value); 4971 4972 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor, 4973 hold_name); 4974 if (error == 0) 4975 (void) strcpy(zc->zc_value, snap_name); 4976 strfree(snap_name); 4977 strfree(hold_name); 4978 zfs_onexit_fd_rele(zc->zc_cleanup_fd); 4979 return (error); 4980} 4981 4982/* 4983 * inputs: 4984 * zc_name name of "to" snapshot 4985 * zc_value name of "from" snapshot 4986 * zc_cookie file descriptor to write diff data on 4987 * 4988 * outputs: 4989 * dmu_diff_record_t's to the file descriptor 4990 */ 4991static int 4992zfs_ioc_diff(zfs_cmd_t *zc) 4993{ 4994 file_t *fp; 4995 cap_rights_t rights; 4996 offset_t off; 4997 int error; 4998 4999 fp = getf(zc->zc_cookie, cap_rights_init(&rights, CAP_WRITE)); 5000 if (fp == NULL) 5001 return (SET_ERROR(EBADF)); 5002 5003 off = fp->f_offset; 5004 5005#ifdef illumos 5006 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off); 5007#else 5008 error = dmu_diff(zc->zc_name, zc->zc_value, fp, &off); 5009#endif 5010 5011 if (off >= 0 && off <= MAXOFFSET_T) 5012 fp->f_offset = off; 5013 releasef(zc->zc_cookie); 5014 5015 return (error); 5016} 5017 5018#ifdef sun 5019/* 5020 * Remove all ACL files in shares dir 5021 */ 5022static int 5023zfs_smb_acl_purge(znode_t *dzp) 5024{ 5025 zap_cursor_t zc; 5026 zap_attribute_t zap; 5027 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 5028 int error; 5029 5030 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); 5031 (error = zap_cursor_retrieve(&zc, &zap)) == 0; 5032 zap_cursor_advance(&zc)) { 5033 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, 5034 NULL, 0)) != 0) 5035 break; 5036 } 5037 zap_cursor_fini(&zc); 5038 return (error); 5039} 5040#endif /* sun */ 5041 5042static int 5043zfs_ioc_smb_acl(zfs_cmd_t *zc) 5044{ 5045#ifdef sun 5046 vnode_t *vp; 5047 znode_t *dzp; 5048 vnode_t *resourcevp = NULL; 5049 znode_t *sharedir; 5050 zfsvfs_t *zfsvfs; 5051 nvlist_t *nvlist; 5052 char *src, *target; 5053 vattr_t vattr; 5054 vsecattr_t vsec; 5055 int error = 0; 5056 5057 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, 5058 NO_FOLLOW, NULL, &vp)) != 0) 5059 return (error); 5060 5061 /* Now make sure mntpnt and dataset are ZFS */ 5062 5063 if (strcmp(vp->v_vfsp->mnt_stat.f_fstypename, "zfs") != 0 || 5064 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), 5065 zc->zc_name) != 0)) { 5066 VN_RELE(vp); 5067 return (SET_ERROR(EINVAL)); 5068 } 5069 5070 dzp = VTOZ(vp); 5071 zfsvfs = dzp->z_zfsvfs; 5072 ZFS_ENTER(zfsvfs); 5073 5074 /* 5075 * Create share dir if its missing. 5076 */ 5077 mutex_enter(&zfsvfs->z_lock); 5078 if (zfsvfs->z_shares_dir == 0) { 5079 dmu_tx_t *tx; 5080 5081 tx = dmu_tx_create(zfsvfs->z_os); 5082 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, 5083 ZFS_SHARES_DIR); 5084 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 5085 error = dmu_tx_assign(tx, TXG_WAIT); 5086 if (error != 0) { 5087 dmu_tx_abort(tx); 5088 } else { 5089 error = zfs_create_share_dir(zfsvfs, tx); 5090 dmu_tx_commit(tx); 5091 } 5092 if (error != 0) { 5093 mutex_exit(&zfsvfs->z_lock); 5094 VN_RELE(vp); 5095 ZFS_EXIT(zfsvfs); 5096 return (error); 5097 } 5098 } 5099 mutex_exit(&zfsvfs->z_lock); 5100 5101 ASSERT(zfsvfs->z_shares_dir); 5102 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { 5103 VN_RELE(vp); 5104 ZFS_EXIT(zfsvfs); 5105 return (error); 5106 } 5107 5108 switch (zc->zc_cookie) { 5109 case ZFS_SMB_ACL_ADD: 5110 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 5111 vattr.va_type = VREG; 5112 vattr.va_mode = S_IFREG|0777; 5113 vattr.va_uid = 0; 5114 vattr.va_gid = 0; 5115 5116 vsec.vsa_mask = VSA_ACE; 5117 vsec.vsa_aclentp = &full_access; 5118 vsec.vsa_aclentsz = sizeof (full_access); 5119 vsec.vsa_aclcnt = 1; 5120 5121 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, 5122 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); 5123 if (resourcevp) 5124 VN_RELE(resourcevp); 5125 break; 5126 5127 case ZFS_SMB_ACL_REMOVE: 5128 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, 5129 NULL, 0); 5130 break; 5131 5132 case ZFS_SMB_ACL_RENAME: 5133 if ((error = get_nvlist(zc->zc_nvlist_src, 5134 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { 5135 VN_RELE(vp); 5136 ZFS_EXIT(zfsvfs); 5137 return (error); 5138 } 5139 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || 5140 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, 5141 &target)) { 5142 VN_RELE(vp); 5143 VN_RELE(ZTOV(sharedir)); 5144 ZFS_EXIT(zfsvfs); 5145 nvlist_free(nvlist); 5146 return (error); 5147 } 5148 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, 5149 kcred, NULL, 0); 5150 nvlist_free(nvlist); 5151 break; 5152 5153 case ZFS_SMB_ACL_PURGE: 5154 error = zfs_smb_acl_purge(sharedir); 5155 break; 5156 5157 default: 5158 error = SET_ERROR(EINVAL); 5159 break; 5160 } 5161 5162 VN_RELE(vp); 5163 VN_RELE(ZTOV(sharedir)); 5164 5165 ZFS_EXIT(zfsvfs); 5166 5167 return (error); 5168#else /* !sun */ 5169 return (EOPNOTSUPP); 5170#endif /* !sun */ 5171} 5172 5173/* 5174 * innvl: { 5175 * "holds" -> { snapname -> holdname (string), ... } 5176 * (optional) "cleanup_fd" -> fd (int32) 5177 * } 5178 * 5179 * outnvl: { 5180 * snapname -> error value (int32) 5181 * ... 5182 * } 5183 */ 5184/* ARGSUSED */ 5185static int 5186zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist) 5187{ 5188 nvlist_t *holds; 5189 int cleanup_fd = -1; 5190 int error; 5191 minor_t minor = 0; 5192 5193 error = nvlist_lookup_nvlist(args, "holds", &holds); 5194 if (error != 0) 5195 return (SET_ERROR(EINVAL)); 5196 5197 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) { 5198 error = zfs_onexit_fd_hold(cleanup_fd, &minor); 5199 if (error != 0) 5200 return (error); 5201 } 5202 5203 error = dsl_dataset_user_hold(holds, minor, errlist); 5204 if (minor != 0) 5205 zfs_onexit_fd_rele(cleanup_fd); 5206 return (error); 5207} 5208 5209/* 5210 * innvl is not used. 5211 * 5212 * outnvl: { 5213 * holdname -> time added (uint64 seconds since epoch) 5214 * ... 5215 * } 5216 */ 5217/* ARGSUSED */ 5218static int 5219zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl) 5220{ 5221 return (dsl_dataset_get_holds(snapname, outnvl)); 5222} 5223 5224/* 5225 * innvl: { 5226 * snapname -> { holdname, ... } 5227 * ... 5228 * } 5229 * 5230 * outnvl: { 5231 * snapname -> error value (int32) 5232 * ... 5233 * } 5234 */ 5235/* ARGSUSED */ 5236static int 5237zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist) 5238{ 5239 return (dsl_dataset_user_release(holds, errlist)); 5240} 5241 5242/* 5243 * inputs: 5244 * zc_name name of new filesystem or snapshot 5245 * zc_value full name of old snapshot 5246 * 5247 * outputs: 5248 * zc_cookie space in bytes 5249 * zc_objset_type compressed space in bytes 5250 * zc_perm_action uncompressed space in bytes 5251 */ 5252static int 5253zfs_ioc_space_written(zfs_cmd_t *zc) 5254{ 5255 int error; 5256 dsl_pool_t *dp; 5257 dsl_dataset_t *new, *old; 5258 5259 error = dsl_pool_hold(zc->zc_name, FTAG, &dp); 5260 if (error != 0) 5261 return (error); 5262 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new); 5263 if (error != 0) { 5264 dsl_pool_rele(dp, FTAG); 5265 return (error); 5266 } 5267 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old); 5268 if (error != 0) { 5269 dsl_dataset_rele(new, FTAG); 5270 dsl_pool_rele(dp, FTAG); 5271 return (error); 5272 } 5273 5274 error = dsl_dataset_space_written(old, new, &zc->zc_cookie, 5275 &zc->zc_objset_type, &zc->zc_perm_action); 5276 dsl_dataset_rele(old, FTAG); 5277 dsl_dataset_rele(new, FTAG); 5278 dsl_pool_rele(dp, FTAG); 5279 return (error); 5280} 5281 5282/* 5283 * innvl: { 5284 * "firstsnap" -> snapshot name 5285 * } 5286 * 5287 * outnvl: { 5288 * "used" -> space in bytes 5289 * "compressed" -> compressed space in bytes 5290 * "uncompressed" -> uncompressed space in bytes 5291 * } 5292 */ 5293static int 5294zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl) 5295{ 5296 int error; 5297 dsl_pool_t *dp; 5298 dsl_dataset_t *new, *old; 5299 char *firstsnap; 5300 uint64_t used, comp, uncomp; 5301 5302 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0) 5303 return (SET_ERROR(EINVAL)); 5304 5305 error = dsl_pool_hold(lastsnap, FTAG, &dp); 5306 if (error != 0) 5307 return (error); 5308 5309 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new); 5310 if (error != 0) { 5311 dsl_pool_rele(dp, FTAG); 5312 return (error); 5313 } 5314 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old); 5315 if (error != 0) { 5316 dsl_dataset_rele(new, FTAG); 5317 dsl_pool_rele(dp, FTAG); 5318 return (error); 5319 } 5320 5321 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp); 5322 dsl_dataset_rele(old, FTAG); 5323 dsl_dataset_rele(new, FTAG); 5324 dsl_pool_rele(dp, FTAG); 5325 fnvlist_add_uint64(outnvl, "used", used); 5326 fnvlist_add_uint64(outnvl, "compressed", comp); 5327 fnvlist_add_uint64(outnvl, "uncompressed", uncomp); 5328 return (error); 5329} 5330 5331static int 5332zfs_ioc_jail(zfs_cmd_t *zc) 5333{ 5334 5335 return (zone_dataset_attach(curthread->td_ucred, zc->zc_name, 5336 (int)zc->zc_jailid)); 5337} 5338 5339static int 5340zfs_ioc_unjail(zfs_cmd_t *zc) 5341{ 5342 5343 return (zone_dataset_detach(curthread->td_ucred, zc->zc_name, 5344 (int)zc->zc_jailid)); 5345} 5346 5347/* 5348 * innvl: { 5349 * "fd" -> file descriptor to write stream to (int32) 5350 * (optional) "fromsnap" -> full snap name to send an incremental from 5351 * } 5352 * 5353 * outnvl is unused 5354 */ 5355/* ARGSUSED */ 5356static int 5357zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5358{ 5359 cap_rights_t rights; 5360 int error; 5361 offset_t off; 5362 char *fromname = NULL; 5363 int fd; 5364 5365 error = nvlist_lookup_int32(innvl, "fd", &fd); 5366 if (error != 0) 5367 return (SET_ERROR(EINVAL)); 5368 5369 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname); 5370 5371 file_t *fp = getf(fd, cap_rights_init(&rights, CAP_READ)); 5372 if (fp == NULL) 5373 return (SET_ERROR(EBADF)); 5374 5375 off = fp->f_offset; 5376#ifdef illumos 5377 error = dmu_send(snapname, fromname, fd, fp->f_vnode, &off); 5378#else 5379 error = dmu_send(snapname, fromname, fd, fp, &off); 5380#endif 5381 5382#ifdef illumos 5383 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) 5384 fp->f_offset = off; 5385#else 5386 fp->f_offset = off; 5387#endif 5388 5389 releasef(fd); 5390 return (error); 5391} 5392 5393/* 5394 * Determine approximately how large a zfs send stream will be -- the number 5395 * of bytes that will be written to the fd supplied to zfs_ioc_send_new(). 5396 * 5397 * innvl: { 5398 * (optional) "fromsnap" -> full snap name to send an incremental from 5399 * } 5400 * 5401 * outnvl: { 5402 * "space" -> bytes of space (uint64) 5403 * } 5404 */ 5405static int 5406zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) 5407{ 5408 dsl_pool_t *dp; 5409 dsl_dataset_t *fromsnap = NULL; 5410 dsl_dataset_t *tosnap; 5411 int error; 5412 char *fromname; 5413 uint64_t space; 5414 5415 error = dsl_pool_hold(snapname, FTAG, &dp); 5416 if (error != 0) 5417 return (error); 5418 5419 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap); 5420 if (error != 0) { 5421 dsl_pool_rele(dp, FTAG); 5422 return (error); 5423 } 5424 5425 error = nvlist_lookup_string(innvl, "fromsnap", &fromname); 5426 if (error == 0) { 5427 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap); 5428 if (error != 0) { 5429 dsl_dataset_rele(tosnap, FTAG); 5430 dsl_pool_rele(dp, FTAG); 5431 return (error); 5432 } 5433 } 5434 5435 error = dmu_send_estimate(tosnap, fromsnap, &space); 5436 fnvlist_add_uint64(outnvl, "space", space); 5437 5438 if (fromsnap != NULL) 5439 dsl_dataset_rele(fromsnap, FTAG); 5440 dsl_dataset_rele(tosnap, FTAG); 5441 dsl_pool_rele(dp, FTAG); 5442 return (error); 5443} 5444 5445 5446static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST]; 5447 5448static void 5449zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5450 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5451 boolean_t log_history, zfs_ioc_poolcheck_t pool_check) 5452{ 5453 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5454 5455 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5456 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5457 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5458 ASSERT3P(vec->zvec_func, ==, NULL); 5459 5460 vec->zvec_legacy_func = func; 5461 vec->zvec_secpolicy = secpolicy; 5462 vec->zvec_namecheck = namecheck; 5463 vec->zvec_allow_log = log_history; 5464 vec->zvec_pool_check = pool_check; 5465} 5466 5467/* 5468 * See the block comment at the beginning of this file for details on 5469 * each argument to this function. 5470 */ 5471static void 5472zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func, 5473 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, 5474 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist, 5475 boolean_t allow_log) 5476{ 5477 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; 5478 5479 ASSERT3U(ioc, >=, ZFS_IOC_FIRST); 5480 ASSERT3U(ioc, <, ZFS_IOC_LAST); 5481 ASSERT3P(vec->zvec_legacy_func, ==, NULL); 5482 ASSERT3P(vec->zvec_func, ==, NULL); 5483 5484 /* if we are logging, the name must be valid */ 5485 ASSERT(!allow_log || namecheck != NO_NAME); 5486 5487 vec->zvec_name = name; 5488 vec->zvec_func = func; 5489 vec->zvec_secpolicy = secpolicy; 5490 vec->zvec_namecheck = namecheck; 5491 vec->zvec_pool_check = pool_check; 5492 vec->zvec_smush_outnvlist = smush_outnvlist; 5493 vec->zvec_allow_log = allow_log; 5494} 5495 5496static void 5497zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5498 zfs_secpolicy_func_t *secpolicy, boolean_t log_history, 5499 zfs_ioc_poolcheck_t pool_check) 5500{ 5501 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5502 POOL_NAME, log_history, pool_check); 5503} 5504 5505static void 5506zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5507 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check) 5508{ 5509 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5510 DATASET_NAME, B_FALSE, pool_check); 5511} 5512 5513static void 5514zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5515{ 5516 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config, 5517 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5518} 5519 5520static void 5521zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5522 zfs_secpolicy_func_t *secpolicy) 5523{ 5524 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5525 NO_NAME, B_FALSE, POOL_CHECK_NONE); 5526} 5527 5528static void 5529zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc, 5530 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy) 5531{ 5532 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5533 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED); 5534} 5535 5536static void 5537zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) 5538{ 5539 zfs_ioctl_register_dataset_read_secpolicy(ioc, func, 5540 zfs_secpolicy_read); 5541} 5542 5543static void 5544zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, 5545 zfs_secpolicy_func_t *secpolicy) 5546{ 5547 zfs_ioctl_register_legacy(ioc, func, secpolicy, 5548 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5549} 5550 5551static void 5552zfs_ioctl_init(void) 5553{ 5554 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT, 5555 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME, 5556 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5557 5558 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY, 5559 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME, 5560 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE); 5561 5562 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS, 5563 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME, 5564 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5565 5566 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW, 5567 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME, 5568 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5569 5570 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE, 5571 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME, 5572 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5573 5574 zfs_ioctl_register("create", ZFS_IOC_CREATE, 5575 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME, 5576 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5577 5578 zfs_ioctl_register("clone", ZFS_IOC_CLONE, 5579 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME, 5580 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5581 5582 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS, 5583 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME, 5584 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5585 5586 zfs_ioctl_register("hold", ZFS_IOC_HOLD, 5587 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME, 5588 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5589 zfs_ioctl_register("release", ZFS_IOC_RELEASE, 5590 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME, 5591 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5592 5593 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS, 5594 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, 5595 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5596 5597 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK, 5598 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, 5599 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE); 5600 5601 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK, 5602 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME, 5603 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5604 5605 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS, 5606 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME, 5607 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); 5608 5609 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS, 5610 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks, 5611 POOL_NAME, 5612 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); 5613 5614 /* IOCTLS that use the legacy function signature */ 5615 5616 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze, 5617 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY); 5618 5619 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create, 5620 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5621 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN, 5622 zfs_ioc_pool_scan); 5623 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE, 5624 zfs_ioc_pool_upgrade); 5625 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD, 5626 zfs_ioc_vdev_add); 5627 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE, 5628 zfs_ioc_vdev_remove); 5629 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE, 5630 zfs_ioc_vdev_set_state); 5631 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH, 5632 zfs_ioc_vdev_attach); 5633 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH, 5634 zfs_ioc_vdev_detach); 5635 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH, 5636 zfs_ioc_vdev_setpath); 5637 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU, 5638 zfs_ioc_vdev_setfru); 5639 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS, 5640 zfs_ioc_pool_set_props); 5641 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT, 5642 zfs_ioc_vdev_split); 5643 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID, 5644 zfs_ioc_pool_reguid); 5645 5646 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS, 5647 zfs_ioc_pool_configs, zfs_secpolicy_none); 5648 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT, 5649 zfs_ioc_pool_tryimport, zfs_secpolicy_config); 5650 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT, 5651 zfs_ioc_inject_fault, zfs_secpolicy_inject); 5652 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT, 5653 zfs_ioc_clear_fault, zfs_secpolicy_inject); 5654 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT, 5655 zfs_ioc_inject_list_next, zfs_secpolicy_inject); 5656 5657 /* 5658 * pool destroy, and export don't log the history as part of 5659 * zfsdev_ioctl, but rather zfs_ioc_pool_export 5660 * does the logging of those commands. 5661 */ 5662 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy, 5663 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5664 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export, 5665 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); 5666 5667 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats, 5668 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5669 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props, 5670 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); 5671 5672 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log, 5673 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_NONE); 5674 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME, 5675 zfs_ioc_dsobj_to_dsname, 5676 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_NONE); 5677 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY, 5678 zfs_ioc_pool_get_history, 5679 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED); 5680 5681 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import, 5682 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5683 5684 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear, 5685 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); 5686 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen, 5687 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED); 5688 5689 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN, 5690 zfs_ioc_space_written); 5691 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS, 5692 zfs_ioc_objset_recvd_props); 5693 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ, 5694 zfs_ioc_next_obj); 5695 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL, 5696 zfs_ioc_get_fsacl); 5697 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS, 5698 zfs_ioc_objset_stats); 5699 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS, 5700 zfs_ioc_objset_zplprops); 5701 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT, 5702 zfs_ioc_dataset_list_next); 5703 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT, 5704 zfs_ioc_snapshot_list_next); 5705 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS, 5706 zfs_ioc_send_progress); 5707 5708 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF, 5709 zfs_ioc_diff, zfs_secpolicy_diff); 5710 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS, 5711 zfs_ioc_obj_to_stats, zfs_secpolicy_diff); 5712 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH, 5713 zfs_ioc_obj_to_path, zfs_secpolicy_diff); 5714 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE, 5715 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one); 5716 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY, 5717 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many); 5718 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND, 5719 zfs_ioc_send, zfs_secpolicy_send); 5720 5721 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop, 5722 zfs_secpolicy_none); 5723 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy, 5724 zfs_secpolicy_destroy); 5725 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename, 5726 zfs_secpolicy_rename); 5727 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv, 5728 zfs_secpolicy_recv); 5729 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote, 5730 zfs_secpolicy_promote); 5731 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP, 5732 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop); 5733 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl, 5734 zfs_secpolicy_set_fsacl); 5735 5736 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share, 5737 zfs_secpolicy_share, POOL_CHECK_NONE); 5738 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl, 5739 zfs_secpolicy_smb_acl, POOL_CHECK_NONE); 5740 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE, 5741 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, 5742 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5743 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT, 5744 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, 5745 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); 5746 5747#ifdef __FreeBSD__ 5748 zfs_ioctl_register_dataset_nolog(ZFS_IOC_JAIL, zfs_ioc_jail, 5749 zfs_secpolicy_config, POOL_CHECK_NONE); 5750 zfs_ioctl_register_dataset_nolog(ZFS_IOC_UNJAIL, zfs_ioc_unjail, 5751 zfs_secpolicy_config, POOL_CHECK_NONE); 5752#endif 5753} 5754 5755int 5756pool_status_check(const char *name, zfs_ioc_namecheck_t type, 5757 zfs_ioc_poolcheck_t check) 5758{ 5759 spa_t *spa; 5760 int error; 5761 5762 ASSERT(type == POOL_NAME || type == DATASET_NAME); 5763 5764 if (check & POOL_CHECK_NONE) 5765 return (0); 5766 5767 error = spa_open(name, &spa, FTAG); 5768 if (error == 0) { 5769 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa)) 5770 error = SET_ERROR(EAGAIN); 5771 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa)) 5772 error = SET_ERROR(EROFS); 5773 spa_close(spa, FTAG); 5774 } 5775 return (error); 5776} 5777 5778/* 5779 * Find a free minor number. 5780 */ 5781minor_t 5782zfsdev_minor_alloc(void) 5783{ 5784 static minor_t last_minor; 5785 minor_t m; 5786 5787 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5788 5789 for (m = last_minor + 1; m != last_minor; m++) { 5790 if (m > ZFSDEV_MAX_MINOR) 5791 m = 1; 5792 if (ddi_get_soft_state(zfsdev_state, m) == NULL) { 5793 last_minor = m; 5794 return (m); 5795 } 5796 } 5797 5798 return (0); 5799} 5800 5801static int 5802zfs_ctldev_init(struct cdev *devp) 5803{ 5804 minor_t minor; 5805 zfs_soft_state_t *zs; 5806 5807 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5808 5809 minor = zfsdev_minor_alloc(); 5810 if (minor == 0) 5811 return (SET_ERROR(ENXIO)); 5812 5813 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) 5814 return (SET_ERROR(EAGAIN)); 5815 5816 devfs_set_cdevpriv((void *)(uintptr_t)minor, zfsdev_close); 5817 5818 zs = ddi_get_soft_state(zfsdev_state, minor); 5819 zs->zss_type = ZSST_CTLDEV; 5820 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data); 5821 5822 return (0); 5823} 5824 5825static void 5826zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor) 5827{ 5828 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5829 5830 zfs_onexit_destroy(zo); 5831 ddi_soft_state_free(zfsdev_state, minor); 5832} 5833 5834void * 5835zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which) 5836{ 5837 zfs_soft_state_t *zp; 5838 5839 zp = ddi_get_soft_state(zfsdev_state, minor); 5840 if (zp == NULL || zp->zss_type != which) 5841 return (NULL); 5842 5843 return (zp->zss_data); 5844} 5845 5846static int 5847zfsdev_open(struct cdev *devp, int flag, int mode, struct thread *td) 5848{ 5849 int error = 0; 5850 5851#ifdef sun 5852 if (getminor(*devp) != 0) 5853 return (zvol_open(devp, flag, otyp, cr)); 5854#endif 5855 5856 /* This is the control device. Allocate a new minor if requested. */ 5857 if (flag & FEXCL) { 5858 mutex_enter(&spa_namespace_lock); 5859 error = zfs_ctldev_init(devp); 5860 mutex_exit(&spa_namespace_lock); 5861 } 5862 5863 return (error); 5864} 5865 5866static void 5867zfsdev_close(void *data) 5868{ 5869 zfs_onexit_t *zo; 5870 minor_t minor = (minor_t)(uintptr_t)data; 5871 5872 if (minor == 0) 5873 return; 5874 5875 mutex_enter(&spa_namespace_lock); 5876 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV); 5877 if (zo == NULL) { 5878 mutex_exit(&spa_namespace_lock); 5879 return; 5880 } 5881 zfs_ctldev_destroy(zo, minor); 5882 mutex_exit(&spa_namespace_lock); 5883} 5884 5885static int 5886zfsdev_ioctl(struct cdev *dev, u_long zcmd, caddr_t arg, int flag, 5887 struct thread *td) 5888{ 5889 zfs_cmd_t *zc; 5890 uint_t vecnum; 5891 int error, rc, len; 5892#ifdef illumos 5893 minor_t minor = getminor(dev); 5894#else 5895 zfs_iocparm_t *zc_iocparm; 5896 int cflag, cmd, oldvecnum; 5897 boolean_t newioc, compat; 5898 cred_t *cr = td->td_ucred; 5899#endif 5900 const zfs_ioc_vec_t *vec; 5901 char *saved_poolname = NULL; 5902 nvlist_t *innvl = NULL; 5903 5904 cflag = ZFS_CMD_COMPAT_NONE; 5905 compat = B_FALSE; 5906 newioc = B_TRUE; 5907 5908 len = IOCPARM_LEN(zcmd); 5909 cmd = zcmd & 0xff; 5910 5911 /* 5912 * Check if we are talking to supported older binaries 5913 * and translate zfs_cmd if necessary 5914 */ 5915 if (len != sizeof(zfs_iocparm_t)) { 5916 newioc = B_FALSE; 5917 if (len == sizeof(zfs_cmd_t)) { 5918 cflag = ZFS_CMD_COMPAT_LZC; 5919 vecnum = cmd; 5920 } else if (len == sizeof(zfs_cmd_deadman_t)) { 5921 cflag = ZFS_CMD_COMPAT_DEADMAN; 5922 compat = B_TRUE; 5923 vecnum = cmd; 5924 } else if (len == sizeof(zfs_cmd_v28_t)) { 5925 cflag = ZFS_CMD_COMPAT_V28; 5926 compat = B_TRUE; 5927 vecnum = cmd; 5928 } else if (len == sizeof(zfs_cmd_v15_t)) { 5929 cflag = ZFS_CMD_COMPAT_V15; 5930 compat = B_TRUE; 5931 vecnum = zfs_ioctl_v15_to_v28[cmd]; 5932 } else 5933 return (EINVAL); 5934 } else 5935 vecnum = cmd; 5936 5937#ifdef illumos 5938 vecnum = cmd - ZFS_IOC_FIRST; 5939 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); 5940#endif 5941 5942 if (compat) { 5943 if (vecnum == ZFS_IOC_COMPAT_PASS) 5944 return (0); 5945 else if (vecnum == ZFS_IOC_COMPAT_FAIL) 5946 return (ENOTSUP); 5947 } 5948 5949 /* 5950 * Check if we have sufficient kernel memory allocated 5951 * for the zfs_cmd_t request. Bail out if not so we 5952 * will not access undefined memory region. 5953 */ 5954 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) 5955 return (SET_ERROR(EINVAL)); 5956 vec = &zfs_ioc_vec[vecnum]; 5957 5958#ifdef illumos 5959 zc = kmem_zalloc(sizeof(zfs_cmd_t), KM_SLEEP); 5960 bzero(zc, sizeof(zfs_cmd_t)); 5961 5962 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); 5963 if (error != 0) { 5964 error = SET_ERROR(EFAULT); 5965 goto out; 5966 } 5967#else /* !illumos */ 5968 /* 5969 * We don't alloc/free zc only if talking to library ioctl version 2 5970 */ 5971 if (cflag != ZFS_CMD_COMPAT_LZC) { 5972 zc = kmem_zalloc(sizeof(zfs_cmd_t), KM_SLEEP); 5973 bzero(zc, sizeof(zfs_cmd_t)); 5974 } else { 5975 zc = (void *)arg; 5976 error = 0; 5977 } 5978 5979 if (newioc) { 5980 zc_iocparm = (void *)arg; 5981 if (zc_iocparm->zfs_cmd_size != sizeof(zfs_cmd_t)) { 5982 error = SET_ERROR(EFAULT); 5983 goto out; 5984 } 5985 error = ddi_copyin((void *)(uintptr_t)zc_iocparm->zfs_cmd, zc, 5986 sizeof(zfs_cmd_t), flag); 5987 if (error != 0) { 5988 error = SET_ERROR(EFAULT); 5989 goto out; 5990 } 5991 } 5992 5993 if (compat) { 5994 zfs_cmd_compat_get(zc, arg, cflag); 5995 oldvecnum = vecnum; 5996 error = zfs_ioctl_compat_pre(zc, &vecnum, cflag); 5997 if (error != 0) 5998 goto out; 5999 if (oldvecnum != vecnum) 6000 vec = &zfs_ioc_vec[vecnum]; 6001 } 6002#endif /* !illumos */ 6003 6004 zc->zc_iflags = flag & FKIOCTL; 6005 if (zc->zc_nvlist_src_size != 0) { 6006 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, 6007 zc->zc_iflags, &innvl); 6008 if (error != 0) 6009 goto out; 6010 } 6011 6012 /* rewrite innvl for backwards compatibility */ 6013 if (compat) 6014 innvl = zfs_ioctl_compat_innvl(zc, innvl, vecnum, cflag); 6015 6016 /* 6017 * Ensure that all pool/dataset names are valid before we pass down to 6018 * the lower layers. 6019 */ 6020 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; 6021 switch (vec->zvec_namecheck) { 6022 case POOL_NAME: 6023 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) 6024 error = SET_ERROR(EINVAL); 6025 else 6026 error = pool_status_check(zc->zc_name, 6027 vec->zvec_namecheck, vec->zvec_pool_check); 6028 break; 6029 6030 case DATASET_NAME: 6031 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) 6032 error = SET_ERROR(EINVAL); 6033 else 6034 error = pool_status_check(zc->zc_name, 6035 vec->zvec_namecheck, vec->zvec_pool_check); 6036 break; 6037 6038 case NO_NAME: 6039 break; 6040 } 6041 6042 if (error == 0 && !(flag & FKIOCTL)) 6043 error = vec->zvec_secpolicy(zc, innvl, cr); 6044 6045 if (error != 0) 6046 goto out; 6047 6048 /* legacy ioctls can modify zc_name */ 6049 len = strcspn(zc->zc_name, "/@#") + 1; 6050 saved_poolname = kmem_alloc(len, KM_SLEEP); 6051 (void) strlcpy(saved_poolname, zc->zc_name, len); 6052 6053 if (vec->zvec_func != NULL) { 6054 nvlist_t *outnvl; 6055 int puterror = 0; 6056 spa_t *spa; 6057 nvlist_t *lognv = NULL; 6058 6059 ASSERT(vec->zvec_legacy_func == NULL); 6060 6061 /* 6062 * Add the innvl to the lognv before calling the func, 6063 * in case the func changes the innvl. 6064 */ 6065 if (vec->zvec_allow_log) { 6066 lognv = fnvlist_alloc(); 6067 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL, 6068 vec->zvec_name); 6069 if (!nvlist_empty(innvl)) { 6070 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL, 6071 innvl); 6072 } 6073 } 6074 6075 outnvl = fnvlist_alloc(); 6076 error = vec->zvec_func(zc->zc_name, innvl, outnvl); 6077 6078 if (error == 0 && vec->zvec_allow_log && 6079 spa_open(zc->zc_name, &spa, FTAG) == 0) { 6080 if (!nvlist_empty(outnvl)) { 6081 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL, 6082 outnvl); 6083 } 6084 (void) spa_history_log_nvl(spa, lognv); 6085 spa_close(spa, FTAG); 6086 } 6087 fnvlist_free(lognv); 6088 6089 /* rewrite outnvl for backwards compatibility */ 6090 if (cflag != ZFS_CMD_COMPAT_NONE && cflag != ZFS_CMD_COMPAT_LZC) 6091 outnvl = zfs_ioctl_compat_outnvl(zc, outnvl, vecnum, 6092 cflag); 6093 6094 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) { 6095 int smusherror = 0; 6096 if (vec->zvec_smush_outnvlist) { 6097 smusherror = nvlist_smush(outnvl, 6098 zc->zc_nvlist_dst_size); 6099 } 6100 if (smusherror == 0) 6101 puterror = put_nvlist(zc, outnvl); 6102 } 6103 6104 if (puterror != 0) 6105 error = puterror; 6106 6107 nvlist_free(outnvl); 6108 } else { 6109 error = vec->zvec_legacy_func(zc); 6110 } 6111 6112out: 6113 nvlist_free(innvl); 6114 6115 if (compat) { 6116 zfs_ioctl_compat_post(zc, cmd, cflag); 6117 zfs_cmd_compat_put(zc, arg, vecnum, cflag); 6118 } 6119 6120#ifdef illumos 6121 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); 6122 if (error == 0 && rc != 0) 6123 error = SET_ERROR(EFAULT); 6124#else 6125 if (newioc) { 6126 rc = ddi_copyout(zc, (void *)(uintptr_t)zc_iocparm->zfs_cmd, 6127 sizeof (zfs_cmd_t), flag); 6128 if (error == 0 && rc != 0) 6129 error = SET_ERROR(EFAULT); 6130 } 6131#endif 6132 if (error == 0 && vec->zvec_allow_log) { 6133 char *s = tsd_get(zfs_allow_log_key); 6134 if (s != NULL) 6135 strfree(s); 6136 (void) tsd_set(zfs_allow_log_key, saved_poolname); 6137 } else { 6138 if (saved_poolname != NULL) 6139 strfree(saved_poolname); 6140 } 6141 6142#ifdef illumos 6143 kmem_free(zc, sizeof (zfs_cmd_t)); 6144#else 6145 /* 6146 * We don't alloc/free zc only if talking to library ioctl version 2 6147 */ 6148 if (cflag != ZFS_CMD_COMPAT_LZC) 6149 kmem_free(zc, sizeof (zfs_cmd_t)); 6150#endif 6151 return (error); 6152} 6153 6154#ifdef sun 6155static int 6156zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 6157{ 6158 if (cmd != DDI_ATTACH) 6159 return (DDI_FAILURE); 6160 6161 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, 6162 DDI_PSEUDO, 0) == DDI_FAILURE) 6163 return (DDI_FAILURE); 6164 6165 zfs_dip = dip; 6166 6167 ddi_report_dev(dip); 6168 6169 return (DDI_SUCCESS); 6170} 6171 6172static int 6173zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 6174{ 6175 if (spa_busy() || zfs_busy() || zvol_busy()) 6176 return (DDI_FAILURE); 6177 6178 if (cmd != DDI_DETACH) 6179 return (DDI_FAILURE); 6180 6181 zfs_dip = NULL; 6182 6183 ddi_prop_remove_all(dip); 6184 ddi_remove_minor_node(dip, NULL); 6185 6186 return (DDI_SUCCESS); 6187} 6188 6189/*ARGSUSED*/ 6190static int 6191zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 6192{ 6193 switch (infocmd) { 6194 case DDI_INFO_DEVT2DEVINFO: 6195 *result = zfs_dip; 6196 return (DDI_SUCCESS); 6197 6198 case DDI_INFO_DEVT2INSTANCE: 6199 *result = (void *)0; 6200 return (DDI_SUCCESS); 6201 } 6202 6203 return (DDI_FAILURE); 6204} 6205#endif /* sun */ 6206 6207/* 6208 * OK, so this is a little weird. 6209 * 6210 * /dev/zfs is the control node, i.e. minor 0. 6211 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. 6212 * 6213 * /dev/zfs has basically nothing to do except serve up ioctls, 6214 * so most of the standard driver entry points are in zvol.c. 6215 */ 6216#ifdef sun 6217static struct cb_ops zfs_cb_ops = { 6218 zfsdev_open, /* open */ 6219 zfsdev_close, /* close */ 6220 zvol_strategy, /* strategy */ 6221 nodev, /* print */ 6222 zvol_dump, /* dump */ 6223 zvol_read, /* read */ 6224 zvol_write, /* write */ 6225 zfsdev_ioctl, /* ioctl */ 6226 nodev, /* devmap */ 6227 nodev, /* mmap */ 6228 nodev, /* segmap */ 6229 nochpoll, /* poll */ 6230 ddi_prop_op, /* prop_op */ 6231 NULL, /* streamtab */ 6232 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ 6233 CB_REV, /* version */ 6234 nodev, /* async read */ 6235 nodev, /* async write */ 6236}; 6237 6238static struct dev_ops zfs_dev_ops = { 6239 DEVO_REV, /* version */ 6240 0, /* refcnt */ 6241 zfs_info, /* info */ 6242 nulldev, /* identify */ 6243 nulldev, /* probe */ 6244 zfs_attach, /* attach */ 6245 zfs_detach, /* detach */ 6246 nodev, /* reset */ 6247 &zfs_cb_ops, /* driver operations */ 6248 NULL, /* no bus operations */ 6249 NULL, /* power */ 6250 ddi_quiesce_not_needed, /* quiesce */ 6251}; 6252 6253static struct modldrv zfs_modldrv = { 6254 &mod_driverops, 6255 "ZFS storage pool", 6256 &zfs_dev_ops 6257}; 6258 6259static struct modlinkage modlinkage = { 6260 MODREV_1, 6261 (void *)&zfs_modlfs, 6262 (void *)&zfs_modldrv, 6263 NULL 6264}; 6265#endif /* sun */ 6266 6267static struct cdevsw zfs_cdevsw = { 6268 .d_version = D_VERSION, 6269 .d_open = zfsdev_open, 6270 .d_ioctl = zfsdev_ioctl, 6271 .d_name = ZFS_DEV_NAME 6272}; 6273 6274static void 6275zfs_allow_log_destroy(void *arg) 6276{ 6277 char *poolname = arg; 6278 strfree(poolname); 6279} 6280 6281static void 6282zfsdev_init(void) 6283{ 6284 zfsdev = make_dev(&zfs_cdevsw, 0x0, UID_ROOT, GID_OPERATOR, 0666, 6285 ZFS_DEV_NAME); 6286} 6287 6288static void 6289zfsdev_fini(void) 6290{ 6291 if (zfsdev != NULL) 6292 destroy_dev(zfsdev); 6293} 6294 6295static struct root_hold_token *zfs_root_token; 6296struct proc *zfsproc; 6297 6298#ifdef sun 6299int 6300_init(void) 6301{ 6302 int error; 6303 6304 spa_init(FREAD | FWRITE); 6305 zfs_init(); 6306 zvol_init(); 6307 zfs_ioctl_init(); 6308 6309 if ((error = mod_install(&modlinkage)) != 0) { 6310 zvol_fini(); 6311 zfs_fini(); 6312 spa_fini(); 6313 return (error); 6314 } 6315 6316 tsd_create(&zfs_fsyncer_key, NULL); 6317 tsd_create(&rrw_tsd_key, rrw_tsd_destroy); 6318 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy); 6319 6320 error = ldi_ident_from_mod(&modlinkage, &zfs_li); 6321 ASSERT(error == 0); 6322 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 6323 6324 return (0); 6325} 6326 6327int 6328_fini(void) 6329{ 6330 int error; 6331 6332 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) 6333 return (SET_ERROR(EBUSY)); 6334 6335 if ((error = mod_remove(&modlinkage)) != 0) 6336 return (error); 6337 6338 zvol_fini(); 6339 zfs_fini(); 6340 spa_fini(); 6341 if (zfs_nfsshare_inited) 6342 (void) ddi_modclose(nfs_mod); 6343 if (zfs_smbshare_inited) 6344 (void) ddi_modclose(smbsrv_mod); 6345 if (zfs_nfsshare_inited || zfs_smbshare_inited) 6346 (void) ddi_modclose(sharefs_mod); 6347 6348 tsd_destroy(&zfs_fsyncer_key); 6349 ldi_ident_release(zfs_li); 6350 zfs_li = NULL; 6351 mutex_destroy(&zfs_share_lock); 6352 6353 return (error); 6354} 6355 6356int 6357_info(struct modinfo *modinfop) 6358{ 6359 return (mod_info(&modlinkage, modinfop)); 6360} 6361#endif /* sun */ 6362 6363static int zfs__init(void); 6364static int zfs__fini(void); 6365static void zfs_shutdown(void *, int); 6366 6367static eventhandler_tag zfs_shutdown_event_tag; 6368 6369int 6370zfs__init(void) 6371{ 6372 6373 zfs_root_token = root_mount_hold("ZFS"); 6374 6375 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); 6376 6377 spa_init(FREAD | FWRITE); 6378 zfs_init(); 6379 zvol_init(); 6380 zfs_ioctl_init(); 6381 6382 tsd_create(&zfs_fsyncer_key, NULL); 6383 tsd_create(&rrw_tsd_key, rrw_tsd_destroy); 6384 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy); 6385 6386 printf("ZFS storage pool version: features support (" SPA_VERSION_STRING ")\n"); 6387 root_mount_rel(zfs_root_token); 6388 6389 zfsdev_init(); 6390 6391 return (0); 6392} 6393 6394int 6395zfs__fini(void) 6396{ 6397 if (spa_busy() || zfs_busy() || zvol_busy() || 6398 zio_injection_enabled) { 6399 return (EBUSY); 6400 } 6401 6402 zfsdev_fini(); 6403 zvol_fini(); 6404 zfs_fini(); 6405 spa_fini(); 6406 6407 tsd_destroy(&zfs_fsyncer_key); 6408 tsd_destroy(&rrw_tsd_key); 6409 tsd_destroy(&zfs_allow_log_key); 6410 6411 mutex_destroy(&zfs_share_lock); 6412 6413 return (0); 6414} 6415 6416static void 6417zfs_shutdown(void *arg __unused, int howto __unused) 6418{ 6419 6420 /* 6421 * ZFS fini routines can not properly work in a panic-ed system. 6422 */ 6423 if (panicstr == NULL) 6424 (void)zfs__fini(); 6425} 6426 6427 6428static int 6429zfs_modevent(module_t mod, int type, void *unused __unused) 6430{ 6431 int err; 6432 6433 switch (type) { 6434 case MOD_LOAD: 6435 err = zfs__init(); 6436 if (err == 0) 6437 zfs_shutdown_event_tag = EVENTHANDLER_REGISTER( 6438 shutdown_post_sync, zfs_shutdown, NULL, 6439 SHUTDOWN_PRI_FIRST); 6440 return (err); 6441 case MOD_UNLOAD: 6442 err = zfs__fini(); 6443 if (err == 0 && zfs_shutdown_event_tag != NULL) 6444 EVENTHANDLER_DEREGISTER(shutdown_post_sync, 6445 zfs_shutdown_event_tag); 6446 return (err); 6447 case MOD_SHUTDOWN: 6448 return (0); 6449 default: 6450 break; 6451 } 6452 return (EOPNOTSUPP); 6453} 6454 6455static moduledata_t zfs_mod = { 6456 "zfsctrl", 6457 zfs_modevent, 6458 0 6459}; 6460DECLARE_MODULE(zfsctrl, zfs_mod, SI_SUB_VFS, SI_ORDER_ANY); 6461MODULE_VERSION(zfsctrl, 1); 6462MODULE_DEPEND(zfsctrl, opensolaris, 1, 1, 1); 6463MODULE_DEPEND(zfsctrl, krpc, 1, 1, 1); 6464MODULE_DEPEND(zfsctrl, acl_nfs4, 1, 1, 1); 6465