Use the LZ4 algorithm to compress metadata when the corresponding feature is enabled

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Portions Copyright 2011 Martin Matuska
  25  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  26  * Copyright (c) 2014, Joyent, Inc. All rights reserved.
  27  * Copyright (c) 2013 by Delphix. All rights reserved.
  28  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  29  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  30  * Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
  31  */
  32 
  33 /*
  34  * ZFS ioctls.
  35  *
  36  * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
  37  * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
  38  *
  39  * There are two ways that we handle ioctls: the legacy way where almost
  40  * all of the logic is in the ioctl callback, and the new way where most
  41  * of the marshalling is handled in the common entry point, zfsdev_ioctl().
  42  *
  43  * Non-legacy ioctls should be registered by calling
  44  * zfs_ioctl_register() from zfs_ioctl_init().  The ioctl is invoked
  45  * from userland by lzc_ioctl().
  46  *
  47  * The registration arguments are as follows:
  48  *
  49  * const char *name
  50  *   The name of the ioctl.  This is used for history logging.  If the
  51  *   ioctl returns successfully (the callback returns 0), and allow_log
  52  *   is true, then a history log entry will be recorded with the input &
  53  *   output nvlists.  The log entry can be printed with "zpool history -i".
  54  *
  55  * zfs_ioc_t ioc
  56  *   The ioctl request number, which userland will pass to ioctl(2).
  57  *   The ioctl numbers can change from release to release, because
  58  *   the caller (libzfs) must be matched to the kernel.
  59  *
  60  * zfs_secpolicy_func_t *secpolicy
  61  *   This function will be called before the zfs_ioc_func_t, to
  62  *   determine if this operation is permitted.  It should return EPERM
  63  *   on failure, and 0 on success.  Checks include determining if the
  64  *   dataset is visible in this zone, and if the user has either all
  65  *   zfs privileges in the zone (SYS_MOUNT), or has been granted permission
  66  *   to do this operation on this dataset with "zfs allow".
  67  *
  68  * zfs_ioc_namecheck_t namecheck
  69  *   This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
  70  *   name, a dataset name, or nothing.  If the name is not well-formed,
  71  *   the ioctl will fail and the callback will not be called.
  72  *   Therefore, the callback can assume that the name is well-formed
  73  *   (e.g. is null-terminated, doesn't have more than one '@' character,
  74  *   doesn't have invalid characters).
  75  *
  76  * zfs_ioc_poolcheck_t pool_check
  77  *   This specifies requirements on the pool state.  If the pool does
  78  *   not meet them (is suspended or is readonly), the ioctl will fail
  79  *   and the callback will not be called.  If any checks are specified
  80  *   (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
  81  *   Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
  82  *   POOL_CHECK_READONLY).
  83  *
  84  * boolean_t smush_outnvlist
  85  *   If smush_outnvlist is true, then the output is presumed to be a
  86  *   list of errors, and it will be "smushed" down to fit into the
  87  *   caller's buffer, by removing some entries and replacing them with a
  88  *   single "N_MORE_ERRORS" entry indicating how many were removed.  See
  89  *   nvlist_smush() for details.  If smush_outnvlist is false, and the
  90  *   outnvlist does not fit into the userland-provided buffer, then the
  91  *   ioctl will fail with ENOMEM.
  92  *
  93  * zfs_ioc_func_t *func
  94  *   The callback function that will perform the operation.
  95  *
  96  *   The callback should return 0 on success, or an error number on
  97  *   failure.  If the function fails, the userland ioctl will return -1,
  98  *   and errno will be set to the callback's return value.  The callback
  99  *   will be called with the following arguments:
 100  *
 101  *   const char *name
 102  *     The name of the pool or dataset to operate on, from
 103  *     zfs_cmd_t:zc_name.  The 'namecheck' argument specifies the
 104  *     expected type (pool, dataset, or none).
 105  *
 106  *   nvlist_t *innvl
 107  *     The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src.  Or
 108  *     NULL if no input nvlist was provided.  Changes to this nvlist are
 109  *     ignored.  If the input nvlist could not be deserialized, the
 110  *     ioctl will fail and the callback will not be called.
 111  *
 112  *   nvlist_t *outnvl
 113  *     The output nvlist, initially empty.  The callback can fill it in,
 114  *     and it will be returned to userland by serializing it into
 115  *     zfs_cmd_t:zc_nvlist_dst.  If it is non-empty, and serialization
 116  *     fails (e.g. because the caller didn't supply a large enough
 117  *     buffer), then the overall ioctl will fail.  See the
 118  *     'smush_nvlist' argument above for additional behaviors.
 119  *
 120  *     There are two typical uses of the output nvlist:
 121  *       - To return state, e.g. property values.  In this case,
 122  *         smush_outnvlist should be false.  If the buffer was not large
 123  *         enough, the caller will reallocate a larger buffer and try
 124  *         the ioctl again.
 125  *
 126  *       - To return multiple errors from an ioctl which makes on-disk
 127  *         changes.  In this case, smush_outnvlist should be true.
 128  *         Ioctls which make on-disk modifications should generally not
 129  *         use the outnvl if they succeed, because the caller can not
 130  *         distinguish between the operation failing, and
 131  *         deserialization failing.
 132  */
 133 
 134 #include <sys/types.h>
 135 #include <sys/param.h>
 136 #include <sys/errno.h>
 137 #include <sys/uio.h>
 138 #include <sys/buf.h>
 139 #include <sys/modctl.h>
 140 #include <sys/open.h>
 141 #include <sys/file.h>
 142 #include <sys/kmem.h>
 143 #include <sys/conf.h>
 144 #include <sys/cmn_err.h>
 145 #include <sys/stat.h>
 146 #include <sys/zfs_ioctl.h>
 147 #include <sys/zfs_vfsops.h>
 148 #include <sys/zfs_znode.h>
 149 #include <sys/zap.h>
 150 #include <sys/spa.h>
 151 #include <sys/spa_impl.h>
 152 #include <sys/vdev.h>
 153 #include <sys/priv_impl.h>
 154 #include <sys/dmu.h>
 155 #include <sys/dsl_dir.h>
 156 #include <sys/dsl_dataset.h>
 157 #include <sys/dsl_prop.h>
 158 #include <sys/dsl_deleg.h>
 159 #include <sys/dmu_objset.h>
 160 #include <sys/dmu_impl.h>
 161 #include <sys/dmu_tx.h>
 162 #include <sys/ddi.h>
 163 #include <sys/sunddi.h>
 164 #include <sys/sunldi.h>
 165 #include <sys/policy.h>
 166 #include <sys/zone.h>
 167 #include <sys/nvpair.h>
 168 #include <sys/pathname.h>
 169 #include <sys/mount.h>
 170 #include <sys/sdt.h>
 171 #include <sys/fs/zfs.h>
 172 #include <sys/zfs_ctldir.h>
 173 #include <sys/zfs_dir.h>
 174 #include <sys/zfs_onexit.h>
 175 #include <sys/zvol.h>
 176 #include <sys/dsl_scan.h>
 177 #include <sharefs/share.h>
 178 #include <sys/dmu_objset.h>
 179 #include <sys/dmu_send.h>
 180 #include <sys/dsl_destroy.h>
 181 #include <sys/dsl_bookmark.h>
 182 #include <sys/dsl_userhold.h>
 183 #include <sys/zfeature.h>
 184 
 185 #include "zfs_namecheck.h"
 186 #include "zfs_prop.h"
 187 #include "zfs_deleg.h"
 188 #include "zfs_comutil.h"
 189 
 190 extern struct modlfs zfs_modlfs;
 191 
 192 extern void zfs_init(void);
 193 extern void zfs_fini(void);
 194 
 195 ldi_ident_t zfs_li = NULL;
 196 dev_info_t *zfs_dip;
 197 
 198 uint_t zfs_fsyncer_key;
 199 extern uint_t rrw_tsd_key;
 200 static uint_t zfs_allow_log_key;
 201 
 202 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
 203 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
 204 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
 205 
 206 typedef enum {
 207         NO_NAME,
 208         POOL_NAME,
 209         DATASET_NAME
 210 } zfs_ioc_namecheck_t;
 211 
 212 typedef enum {
 213         POOL_CHECK_NONE         = 1 << 0,
 214         POOL_CHECK_SUSPENDED    = 1 << 1,
 215         POOL_CHECK_READONLY     = 1 << 2,
 216 } zfs_ioc_poolcheck_t;
 217 
 218 typedef struct zfs_ioc_vec {
 219         zfs_ioc_legacy_func_t   *zvec_legacy_func;
 220         zfs_ioc_func_t          *zvec_func;
 221         zfs_secpolicy_func_t    *zvec_secpolicy;
 222         zfs_ioc_namecheck_t     zvec_namecheck;
 223         boolean_t               zvec_allow_log;
 224         zfs_ioc_poolcheck_t     zvec_pool_check;
 225         boolean_t               zvec_smush_outnvlist;
 226         const char              *zvec_name;
 227 } zfs_ioc_vec_t;
 228 
 229 /* This array is indexed by zfs_userquota_prop_t */
 230 static const char *userquota_perms[] = {
 231         ZFS_DELEG_PERM_USERUSED,
 232         ZFS_DELEG_PERM_USERQUOTA,
 233         ZFS_DELEG_PERM_GROUPUSED,
 234         ZFS_DELEG_PERM_GROUPQUOTA,
 235 };
 236 
 237 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
 238 static int zfs_check_settable(const char *name, nvpair_t *property,
 239     cred_t *cr);
 240 static int zfs_check_clearable(char *dataset, nvlist_t *props,
 241     nvlist_t **errors);
 242 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
 243     boolean_t *);
 244 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
 245 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
 246 
 247 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature);
 248 
 249 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
 250 void
 251 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
 252 {
 253         const char *newfile;
 254         char buf[512];
 255         va_list adx;
 256 
 257         /*
 258          * Get rid of annoying "../common/" prefix to filename.
 259          */
 260         newfile = strrchr(file, '/');
 261         if (newfile != NULL) {
 262                 newfile = newfile + 1; /* Get rid of leading / */
 263         } else {
 264                 newfile = file;
 265         }
 266 
 267         va_start(adx, fmt);
 268         (void) vsnprintf(buf, sizeof (buf), fmt, adx);
 269         va_end(adx);
 270 
 271         /*
 272          * To get this data, use the zfs-dprintf probe as so:
 273          * dtrace -q -n 'zfs-dprintf \
 274          *      /stringof(arg0) == "dbuf.c"/ \
 275          *      {printf("%s: %s", stringof(arg1), stringof(arg3))}'
 276          * arg0 = file name
 277          * arg1 = function name
 278          * arg2 = line number
 279          * arg3 = message
 280          */
 281         DTRACE_PROBE4(zfs__dprintf,
 282             char *, newfile, char *, func, int, line, char *, buf);
 283 }
 284 
 285 static void
 286 history_str_free(char *buf)
 287 {
 288         kmem_free(buf, HIS_MAX_RECORD_LEN);
 289 }
 290 
 291 static char *
 292 history_str_get(zfs_cmd_t *zc)
 293 {
 294         char *buf;
 295 
 296         if (zc->zc_history == NULL)
 297                 return (NULL);
 298 
 299         buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
 300         if (copyinstr((void *)(uintptr_t)zc->zc_history,
 301             buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
 302                 history_str_free(buf);
 303                 return (NULL);
 304         }
 305 
 306         buf[HIS_MAX_RECORD_LEN -1] = '\0';
 307 
 308         return (buf);
 309 }
 310 
 311 /*
 312  * Check to see if the named dataset is currently defined as bootable
 313  */
 314 static boolean_t
 315 zfs_is_bootfs(const char *name)
 316 {
 317         objset_t *os;
 318 
 319         if (dmu_objset_hold(name, FTAG, &os) == 0) {
 320                 boolean_t ret;
 321                 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
 322                 dmu_objset_rele(os, FTAG);
 323                 return (ret);
 324         }
 325         return (B_FALSE);
 326 }
 327 
 328 /*
 329  * Return non-zero if the spa version is less than requested version.
 330  */
 331 static int
 332 zfs_earlier_version(const char *name, int version)
 333 {
 334         spa_t *spa;
 335 
 336         if (spa_open(name, &spa, FTAG) == 0) {
 337                 if (spa_version(spa) < version) {
 338                         spa_close(spa, FTAG);
 339                         return (1);
 340                 }
 341                 spa_close(spa, FTAG);
 342         }
 343         return (0);
 344 }
 345 
 346 /*
 347  * Return TRUE if the ZPL version is less than requested version.
 348  */
 349 static boolean_t
 350 zpl_earlier_version(const char *name, int version)
 351 {
 352         objset_t *os;
 353         boolean_t rc = B_TRUE;
 354 
 355         if (dmu_objset_hold(name, FTAG, &os) == 0) {
 356                 uint64_t zplversion;
 357 
 358                 if (dmu_objset_type(os) != DMU_OST_ZFS) {
 359                         dmu_objset_rele(os, FTAG);
 360                         return (B_TRUE);
 361                 }
 362                 /* XXX reading from non-owned objset */
 363                 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
 364                         rc = zplversion < version;
 365                 dmu_objset_rele(os, FTAG);
 366         }
 367         return (rc);
 368 }
 369 
 370 static void
 371 zfs_log_history(zfs_cmd_t *zc)
 372 {
 373         spa_t *spa;
 374         char *buf;
 375 
 376         if ((buf = history_str_get(zc)) == NULL)
 377                 return;
 378 
 379         if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
 380                 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
 381                         (void) spa_history_log(spa, buf);
 382                 spa_close(spa, FTAG);
 383         }
 384         history_str_free(buf);
 385 }
 386 
 387 /*
 388  * Policy for top-level read operations (list pools).  Requires no privileges,
 389  * and can be used in the local zone, as there is no associated dataset.
 390  */
 391 /* ARGSUSED */
 392 static int
 393 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 394 {
 395         return (0);
 396 }
 397 
 398 /*
 399  * Policy for dataset read operations (list children, get statistics).  Requires
 400  * no privileges, but must be visible in the local zone.
 401  */
 402 /* ARGSUSED */
 403 static int
 404 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 405 {
 406         if (INGLOBALZONE(curproc) ||
 407             zone_dataset_visible(zc->zc_name, NULL))
 408                 return (0);
 409 
 410         return (SET_ERROR(ENOENT));
 411 }
 412 
 413 static int
 414 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
 415 {
 416         int writable = 1;
 417 
 418         /*
 419          * The dataset must be visible by this zone -- check this first
 420          * so they don't see EPERM on something they shouldn't know about.
 421          */
 422         if (!INGLOBALZONE(curproc) &&
 423             !zone_dataset_visible(dataset, &writable))
 424                 return (SET_ERROR(ENOENT));
 425 
 426         if (INGLOBALZONE(curproc)) {
 427                 /*
 428                  * If the fs is zoned, only root can access it from the
 429                  * global zone.
 430                  */
 431                 if (secpolicy_zfs(cr) && zoned)
 432                         return (SET_ERROR(EPERM));
 433         } else {
 434                 /*
 435                  * If we are in a local zone, the 'zoned' property must be set.
 436                  */
 437                 if (!zoned)
 438                         return (SET_ERROR(EPERM));
 439 
 440                 /* must be writable by this zone */
 441                 if (!writable)
 442                         return (SET_ERROR(EPERM));
 443         }
 444         return (0);
 445 }
 446 
 447 static int
 448 zfs_dozonecheck(const char *dataset, cred_t *cr)
 449 {
 450         uint64_t zoned;
 451 
 452         if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
 453                 return (SET_ERROR(ENOENT));
 454 
 455         return (zfs_dozonecheck_impl(dataset, zoned, cr));
 456 }
 457 
 458 static int
 459 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
 460 {
 461         uint64_t zoned;
 462 
 463         if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
 464                 return (SET_ERROR(ENOENT));
 465 
 466         return (zfs_dozonecheck_impl(dataset, zoned, cr));
 467 }
 468 
 469 static int
 470 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
 471     const char *perm, cred_t *cr)
 472 {
 473         int error;
 474 
 475         error = zfs_dozonecheck_ds(name, ds, cr);
 476         if (error == 0) {
 477                 error = secpolicy_zfs(cr);
 478                 if (error != 0)
 479                         error = dsl_deleg_access_impl(ds, perm, cr);
 480         }
 481         return (error);
 482 }
 483 
 484 static int
 485 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
 486 {
 487         int error;
 488         dsl_dataset_t *ds;
 489         dsl_pool_t *dp;
 490 
 491         error = dsl_pool_hold(name, FTAG, &dp);
 492         if (error != 0)
 493                 return (error);
 494 
 495         error = dsl_dataset_hold(dp, name, FTAG, &ds);
 496         if (error != 0) {
 497                 dsl_pool_rele(dp, FTAG);
 498                 return (error);
 499         }
 500 
 501         error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
 502 
 503         dsl_dataset_rele(ds, FTAG);
 504         dsl_pool_rele(dp, FTAG);
 505         return (error);
 506 }
 507 
 508 /*
 509  * Policy for setting the security label property.
 510  *
 511  * Returns 0 for success, non-zero for access and other errors.
 512  */
 513 static int
 514 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
 515 {
 516         char            ds_hexsl[MAXNAMELEN];
 517         bslabel_t       ds_sl, new_sl;
 518         boolean_t       new_default = FALSE;
 519         uint64_t        zoned;
 520         int             needed_priv = -1;
 521         int             error;
 522 
 523         /* First get the existing dataset label. */
 524         error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
 525             1, sizeof (ds_hexsl), &ds_hexsl, NULL);
 526         if (error != 0)
 527                 return (SET_ERROR(EPERM));
 528 
 529         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
 530                 new_default = TRUE;
 531 
 532         /* The label must be translatable */
 533         if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
 534                 return (SET_ERROR(EINVAL));
 535 
 536         /*
 537          * In a non-global zone, disallow attempts to set a label that
 538          * doesn't match that of the zone; otherwise no other checks
 539          * are needed.
 540          */
 541         if (!INGLOBALZONE(curproc)) {
 542                 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
 543                         return (SET_ERROR(EPERM));
 544                 return (0);
 545         }
 546 
 547         /*
 548          * For global-zone datasets (i.e., those whose zoned property is
 549          * "off", verify that the specified new label is valid for the
 550          * global zone.
 551          */
 552         if (dsl_prop_get_integer(name,
 553             zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
 554                 return (SET_ERROR(EPERM));
 555         if (!zoned) {
 556                 if (zfs_check_global_label(name, strval) != 0)
 557                         return (SET_ERROR(EPERM));
 558         }
 559 
 560         /*
 561          * If the existing dataset label is nondefault, check if the
 562          * dataset is mounted (label cannot be changed while mounted).
 563          * Get the zfsvfs; if there isn't one, then the dataset isn't
 564          * mounted (or isn't a dataset, doesn't exist, ...).
 565          */
 566         if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
 567                 objset_t *os;
 568                 static char *setsl_tag = "setsl_tag";
 569 
 570                 /*
 571                  * Try to own the dataset; abort if there is any error,
 572                  * (e.g., already mounted, in use, or other error).
 573                  */
 574                 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
 575                     setsl_tag, &os);
 576                 if (error != 0)
 577                         return (SET_ERROR(EPERM));
 578 
 579                 dmu_objset_disown(os, setsl_tag);
 580 
 581                 if (new_default) {
 582                         needed_priv = PRIV_FILE_DOWNGRADE_SL;
 583                         goto out_check;
 584                 }
 585 
 586                 if (hexstr_to_label(strval, &new_sl) != 0)
 587                         return (SET_ERROR(EPERM));
 588 
 589                 if (blstrictdom(&ds_sl, &new_sl))
 590                         needed_priv = PRIV_FILE_DOWNGRADE_SL;
 591                 else if (blstrictdom(&new_sl, &ds_sl))
 592                         needed_priv = PRIV_FILE_UPGRADE_SL;
 593         } else {
 594                 /* dataset currently has a default label */
 595                 if (!new_default)
 596                         needed_priv = PRIV_FILE_UPGRADE_SL;
 597         }
 598 
 599 out_check:
 600         if (needed_priv != -1)
 601                 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
 602         return (0);
 603 }
 604 
 605 static int
 606 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
 607     cred_t *cr)
 608 {
 609         char *strval;
 610 
 611         /*
 612          * Check permissions for special properties.
 613          */
 614         switch (prop) {
 615         case ZFS_PROP_ZONED:
 616                 /*
 617                  * Disallow setting of 'zoned' from within a local zone.
 618                  */
 619                 if (!INGLOBALZONE(curproc))
 620                         return (SET_ERROR(EPERM));
 621                 break;
 622 
 623         case ZFS_PROP_QUOTA:
 624         case ZFS_PROP_FILESYSTEM_LIMIT:
 625         case ZFS_PROP_SNAPSHOT_LIMIT:
 626                 if (!INGLOBALZONE(curproc)) {
 627                         uint64_t zoned;
 628                         char setpoint[MAXNAMELEN];
 629                         /*
 630                          * Unprivileged users are allowed to modify the
 631                          * limit on things *under* (ie. contained by)
 632                          * the thing they own.
 633                          */
 634                         if (dsl_prop_get_integer(dsname, "zoned", &zoned,
 635                             setpoint))
 636                                 return (SET_ERROR(EPERM));
 637                         if (!zoned || strlen(dsname) <= strlen(setpoint))
 638                                 return (SET_ERROR(EPERM));
 639                 }
 640                 break;
 641 
 642         case ZFS_PROP_MLSLABEL:
 643                 if (!is_system_labeled())
 644                         return (SET_ERROR(EPERM));
 645 
 646                 if (nvpair_value_string(propval, &strval) == 0) {
 647                         int err;
 648 
 649                         err = zfs_set_slabel_policy(dsname, strval, CRED());
 650                         if (err != 0)
 651                                 return (err);
 652                 }
 653                 break;
 654         }
 655 
 656         return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
 657 }
 658 
 659 /* ARGSUSED */
 660 static int
 661 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 662 {
 663         int error;
 664 
 665         error = zfs_dozonecheck(zc->zc_name, cr);
 666         if (error != 0)
 667                 return (error);
 668 
 669         /*
 670          * permission to set permissions will be evaluated later in
 671          * dsl_deleg_can_allow()
 672          */
 673         return (0);
 674 }
 675 
 676 /* ARGSUSED */
 677 static int
 678 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 679 {
 680         return (zfs_secpolicy_write_perms(zc->zc_name,
 681             ZFS_DELEG_PERM_ROLLBACK, cr));
 682 }
 683 
 684 /* ARGSUSED */
 685 static int
 686 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 687 {
 688         dsl_pool_t *dp;
 689         dsl_dataset_t *ds;
 690         char *cp;
 691         int error;
 692 
 693         /*
 694          * Generate the current snapshot name from the given objsetid, then
 695          * use that name for the secpolicy/zone checks.
 696          */
 697         cp = strchr(zc->zc_name, '@');
 698         if (cp == NULL)
 699                 return (SET_ERROR(EINVAL));
 700         error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
 701         if (error != 0)
 702                 return (error);
 703 
 704         error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
 705         if (error != 0) {
 706                 dsl_pool_rele(dp, FTAG);
 707                 return (error);
 708         }
 709 
 710         dsl_dataset_name(ds, zc->zc_name);
 711 
 712         error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
 713             ZFS_DELEG_PERM_SEND, cr);
 714         dsl_dataset_rele(ds, FTAG);
 715         dsl_pool_rele(dp, FTAG);
 716 
 717         return (error);
 718 }
 719 
 720 /* ARGSUSED */
 721 static int
 722 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 723 {
 724         return (zfs_secpolicy_write_perms(zc->zc_name,
 725             ZFS_DELEG_PERM_SEND, cr));
 726 }
 727 
 728 /* ARGSUSED */
 729 static int
 730 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 731 {
 732         vnode_t *vp;
 733         int error;
 734 
 735         if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
 736             NO_FOLLOW, NULL, &vp)) != 0)
 737                 return (error);
 738 
 739         /* Now make sure mntpnt and dataset are ZFS */
 740 
 741         if (vp->v_vfsp->vfs_fstype != zfsfstype ||
 742             (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
 743             zc->zc_name) != 0)) {
 744                 VN_RELE(vp);
 745                 return (SET_ERROR(EPERM));
 746         }
 747 
 748         VN_RELE(vp);
 749         return (dsl_deleg_access(zc->zc_name,
 750             ZFS_DELEG_PERM_SHARE, cr));
 751 }
 752 
 753 int
 754 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 755 {
 756         if (!INGLOBALZONE(curproc))
 757                 return (SET_ERROR(EPERM));
 758 
 759         if (secpolicy_nfs(cr) == 0) {
 760                 return (0);
 761         } else {
 762                 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
 763         }
 764 }
 765 
 766 int
 767 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 768 {
 769         if (!INGLOBALZONE(curproc))
 770                 return (SET_ERROR(EPERM));
 771 
 772         if (secpolicy_smb(cr) == 0) {
 773                 return (0);
 774         } else {
 775                 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
 776         }
 777 }
 778 
 779 static int
 780 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
 781 {
 782         char *cp;
 783 
 784         /*
 785          * Remove the @bla or /bla from the end of the name to get the parent.
 786          */
 787         (void) strncpy(parent, datasetname, parentsize);
 788         cp = strrchr(parent, '@');
 789         if (cp != NULL) {
 790                 cp[0] = '\0';
 791         } else {
 792                 cp = strrchr(parent, '/');
 793                 if (cp == NULL)
 794                         return (SET_ERROR(ENOENT));
 795                 cp[0] = '\0';
 796         }
 797 
 798         return (0);
 799 }
 800 
 801 int
 802 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
 803 {
 804         int error;
 805 
 806         if ((error = zfs_secpolicy_write_perms(name,
 807             ZFS_DELEG_PERM_MOUNT, cr)) != 0)
 808                 return (error);
 809 
 810         return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
 811 }
 812 
 813 /* ARGSUSED */
 814 static int
 815 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 816 {
 817         return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
 818 }
 819 
 820 /*
 821  * Destroying snapshots with delegated permissions requires
 822  * descendant mount and destroy permissions.
 823  */
 824 /* ARGSUSED */
 825 static int
 826 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 827 {
 828         nvlist_t *snaps;
 829         nvpair_t *pair, *nextpair;
 830         int error = 0;
 831 
 832         if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
 833                 return (SET_ERROR(EINVAL));
 834         for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
 835             pair = nextpair) {
 836                 nextpair = nvlist_next_nvpair(snaps, pair);
 837                 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr);
 838                 if (error == ENOENT) {
 839                         /*
 840                          * Ignore any snapshots that don't exist (we consider
 841                          * them "already destroyed").  Remove the name from the
 842                          * nvl here in case the snapshot is created between
 843                          * now and when we try to destroy it (in which case
 844                          * we don't want to destroy it since we haven't
 845                          * checked for permission).
 846                          */
 847                         fnvlist_remove_nvpair(snaps, pair);
 848                         error = 0;
 849                 }
 850                 if (error != 0)
 851                         break;
 852         }
 853 
 854         return (error);
 855 }
 856 
 857 int
 858 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
 859 {
 860         char    parentname[MAXNAMELEN];
 861         int     error;
 862 
 863         if ((error = zfs_secpolicy_write_perms(from,
 864             ZFS_DELEG_PERM_RENAME, cr)) != 0)
 865                 return (error);
 866 
 867         if ((error = zfs_secpolicy_write_perms(from,
 868             ZFS_DELEG_PERM_MOUNT, cr)) != 0)
 869                 return (error);
 870 
 871         if ((error = zfs_get_parent(to, parentname,
 872             sizeof (parentname))) != 0)
 873                 return (error);
 874 
 875         if ((error = zfs_secpolicy_write_perms(parentname,
 876             ZFS_DELEG_PERM_CREATE, cr)) != 0)
 877                 return (error);
 878 
 879         if ((error = zfs_secpolicy_write_perms(parentname,
 880             ZFS_DELEG_PERM_MOUNT, cr)) != 0)
 881                 return (error);
 882 
 883         return (error);
 884 }
 885 
 886 /* ARGSUSED */
 887 static int
 888 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 889 {
 890         return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
 891 }
 892 
 893 /* ARGSUSED */
 894 static int
 895 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 896 {
 897         dsl_pool_t *dp;
 898         dsl_dataset_t *clone;
 899         int error;
 900 
 901         error = zfs_secpolicy_write_perms(zc->zc_name,
 902             ZFS_DELEG_PERM_PROMOTE, cr);
 903         if (error != 0)
 904                 return (error);
 905 
 906         error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
 907         if (error != 0)
 908                 return (error);
 909 
 910         error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
 911 
 912         if (error == 0) {
 913                 char parentname[MAXNAMELEN];
 914                 dsl_dataset_t *origin = NULL;
 915                 dsl_dir_t *dd;
 916                 dd = clone->ds_dir;
 917 
 918                 error = dsl_dataset_hold_obj(dd->dd_pool,
 919                     dd->dd_phys->dd_origin_obj, FTAG, &origin);
 920                 if (error != 0) {
 921                         dsl_dataset_rele(clone, FTAG);
 922                         dsl_pool_rele(dp, FTAG);
 923                         return (error);
 924                 }
 925 
 926                 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
 927                     ZFS_DELEG_PERM_MOUNT, cr);
 928 
 929                 dsl_dataset_name(origin, parentname);
 930                 if (error == 0) {
 931                         error = zfs_secpolicy_write_perms_ds(parentname, origin,
 932                             ZFS_DELEG_PERM_PROMOTE, cr);
 933                 }
 934                 dsl_dataset_rele(clone, FTAG);
 935                 dsl_dataset_rele(origin, FTAG);
 936         }
 937         dsl_pool_rele(dp, FTAG);
 938         return (error);
 939 }
 940 
 941 /* ARGSUSED */
 942 static int
 943 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 944 {
 945         int error;
 946 
 947         if ((error = zfs_secpolicy_write_perms(zc->zc_name,
 948             ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
 949                 return (error);
 950 
 951         if ((error = zfs_secpolicy_write_perms(zc->zc_name,
 952             ZFS_DELEG_PERM_MOUNT, cr)) != 0)
 953                 return (error);
 954 
 955         return (zfs_secpolicy_write_perms(zc->zc_name,
 956             ZFS_DELEG_PERM_CREATE, cr));
 957 }
 958 
 959 int
 960 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
 961 {
 962         return (zfs_secpolicy_write_perms(name,
 963             ZFS_DELEG_PERM_SNAPSHOT, cr));
 964 }
 965 
 966 /*
 967  * Check for permission to create each snapshot in the nvlist.
 968  */
 969 /* ARGSUSED */
 970 static int
 971 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
 972 {
 973         nvlist_t *snaps;
 974         int error = 0;
 975         nvpair_t *pair;
 976 
 977         if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
 978                 return (SET_ERROR(EINVAL));
 979         for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
 980             pair = nvlist_next_nvpair(snaps, pair)) {
 981                 char *name = nvpair_name(pair);
 982                 char *atp = strchr(name, '@');
 983 
 984                 if (atp == NULL) {
 985                         error = SET_ERROR(EINVAL);
 986                         break;
 987                 }
 988                 *atp = '\0';
 989                 error = zfs_secpolicy_snapshot_perms(name, cr);
 990                 *atp = '@';
 991                 if (error != 0)
 992                         break;
 993         }
 994         return (error);
 995 }
 996 
 997 /*
 998  * Check for permission to create each snapshot in the nvlist.
 999  */
1000 /* ARGSUSED */
1001 static int
1002 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1003 {
1004         int error = 0;
1005 
1006         for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
1007             pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
1008                 char *name = nvpair_name(pair);
1009                 char *hashp = strchr(name, '#');
1010 
1011                 if (hashp == NULL) {
1012                         error = SET_ERROR(EINVAL);
1013                         break;
1014                 }
1015                 *hashp = '\0';
1016                 error = zfs_secpolicy_write_perms(name,
1017                     ZFS_DELEG_PERM_BOOKMARK, cr);
1018                 *hashp = '#';
1019                 if (error != 0)
1020                         break;
1021         }
1022         return (error);
1023 }
1024 
1025 /* ARGSUSED */
1026 static int
1027 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1028 {
1029         nvpair_t *pair, *nextpair;
1030         int error = 0;
1031 
1032         for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1033             pair = nextpair) {
1034                 char *name = nvpair_name(pair);
1035                 char *hashp = strchr(name, '#');
1036                 nextpair = nvlist_next_nvpair(innvl, pair);
1037 
1038                 if (hashp == NULL) {
1039                         error = SET_ERROR(EINVAL);
1040                         break;
1041                 }
1042 
1043                 *hashp = '\0';
1044                 error = zfs_secpolicy_write_perms(name,
1045                     ZFS_DELEG_PERM_DESTROY, cr);
1046                 *hashp = '#';
1047                 if (error == ENOENT) {
1048                         /*
1049                          * Ignore any filesystems that don't exist (we consider
1050                          * their bookmarks "already destroyed").  Remove
1051                          * the name from the nvl here in case the filesystem
1052                          * is created between now and when we try to destroy
1053                          * the bookmark (in which case we don't want to
1054                          * destroy it since we haven't checked for permission).
1055                          */
1056                         fnvlist_remove_nvpair(innvl, pair);
1057                         error = 0;
1058                 }
1059                 if (error != 0)
1060                         break;
1061         }
1062 
1063         return (error);
1064 }
1065 
1066 /* ARGSUSED */
1067 static int
1068 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1069 {
1070         /*
1071          * Even root must have a proper TSD so that we know what pool
1072          * to log to.
1073          */
1074         if (tsd_get(zfs_allow_log_key) == NULL)
1075                 return (SET_ERROR(EPERM));
1076         return (0);
1077 }
1078 
1079 static int
1080 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1081 {
1082         char    parentname[MAXNAMELEN];
1083         int     error;
1084         char    *origin;
1085 
1086         if ((error = zfs_get_parent(zc->zc_name, parentname,
1087             sizeof (parentname))) != 0)
1088                 return (error);
1089 
1090         if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1091             (error = zfs_secpolicy_write_perms(origin,
1092             ZFS_DELEG_PERM_CLONE, cr)) != 0)
1093                 return (error);
1094 
1095         if ((error = zfs_secpolicy_write_perms(parentname,
1096             ZFS_DELEG_PERM_CREATE, cr)) != 0)
1097                 return (error);
1098 
1099         return (zfs_secpolicy_write_perms(parentname,
1100             ZFS_DELEG_PERM_MOUNT, cr));
1101 }
1102 
1103 /*
1104  * Policy for pool operations - create/destroy pools, add vdevs, etc.  Requires
1105  * SYS_CONFIG privilege, which is not available in a local zone.
1106  */
1107 /* ARGSUSED */
1108 static int
1109 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1110 {
1111         if (secpolicy_sys_config(cr, B_FALSE) != 0)
1112                 return (SET_ERROR(EPERM));
1113 
1114         return (0);
1115 }
1116 
1117 /*
1118  * Policy for object to name lookups.
1119  */
1120 /* ARGSUSED */
1121 static int
1122 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1123 {
1124         int error;
1125 
1126         if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1127                 return (0);
1128 
1129         error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1130         return (error);
1131 }
1132 
1133 /*
1134  * Policy for fault injection.  Requires all privileges.
1135  */
1136 /* ARGSUSED */
1137 static int
1138 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1139 {
1140         return (secpolicy_zinject(cr));
1141 }
1142 
1143 /* ARGSUSED */
1144 static int
1145 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1146 {
1147         zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1148 
1149         if (prop == ZPROP_INVAL) {
1150                 if (!zfs_prop_user(zc->zc_value))
1151                         return (SET_ERROR(EINVAL));
1152                 return (zfs_secpolicy_write_perms(zc->zc_name,
1153                     ZFS_DELEG_PERM_USERPROP, cr));
1154         } else {
1155                 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1156                     NULL, cr));
1157         }
1158 }
1159 
1160 static int
1161 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1162 {
1163         int err = zfs_secpolicy_read(zc, innvl, cr);
1164         if (err)
1165                 return (err);
1166 
1167         if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1168                 return (SET_ERROR(EINVAL));
1169 
1170         if (zc->zc_value[0] == 0) {
1171                 /*
1172                  * They are asking about a posix uid/gid.  If it's
1173                  * themself, allow it.
1174                  */
1175                 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1176                     zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1177                         if (zc->zc_guid == crgetuid(cr))
1178                                 return (0);
1179                 } else {
1180                         if (groupmember(zc->zc_guid, cr))
1181                                 return (0);
1182                 }
1183         }
1184 
1185         return (zfs_secpolicy_write_perms(zc->zc_name,
1186             userquota_perms[zc->zc_objset_type], cr));
1187 }
1188 
1189 static int
1190 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1191 {
1192         int err = zfs_secpolicy_read(zc, innvl, cr);
1193         if (err)
1194                 return (err);
1195 
1196         if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1197                 return (SET_ERROR(EINVAL));
1198 
1199         return (zfs_secpolicy_write_perms(zc->zc_name,
1200             userquota_perms[zc->zc_objset_type], cr));
1201 }
1202 
1203 /* ARGSUSED */
1204 static int
1205 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1206 {
1207         return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1208             NULL, cr));
1209 }
1210 
1211 /* ARGSUSED */
1212 static int
1213 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1214 {
1215         nvpair_t *pair;
1216         nvlist_t *holds;
1217         int error;
1218 
1219         error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1220         if (error != 0)
1221                 return (SET_ERROR(EINVAL));
1222 
1223         for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1224             pair = nvlist_next_nvpair(holds, pair)) {
1225                 char fsname[MAXNAMELEN];
1226                 error = dmu_fsname(nvpair_name(pair), fsname);
1227                 if (error != 0)
1228                         return (error);
1229                 error = zfs_secpolicy_write_perms(fsname,
1230                     ZFS_DELEG_PERM_HOLD, cr);
1231                 if (error != 0)
1232                         return (error);
1233         }
1234         return (0);
1235 }
1236 
1237 /* ARGSUSED */
1238 static int
1239 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1240 {
1241         nvpair_t *pair;
1242         int error;
1243 
1244         for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1245             pair = nvlist_next_nvpair(innvl, pair)) {
1246                 char fsname[MAXNAMELEN];
1247                 error = dmu_fsname(nvpair_name(pair), fsname);
1248                 if (error != 0)
1249                         return (error);
1250                 error = zfs_secpolicy_write_perms(fsname,
1251                     ZFS_DELEG_PERM_RELEASE, cr);
1252                 if (error != 0)
1253                         return (error);
1254         }
1255         return (0);
1256 }
1257 
1258 /*
1259  * Policy for allowing temporary snapshots to be taken or released
1260  */
1261 static int
1262 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1263 {
1264         /*
1265          * A temporary snapshot is the same as a snapshot,
1266          * hold, destroy and release all rolled into one.
1267          * Delegated diff alone is sufficient that we allow this.
1268          */
1269         int error;
1270 
1271         if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1272             ZFS_DELEG_PERM_DIFF, cr)) == 0)
1273                 return (0);
1274 
1275         error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1276         if (error == 0)
1277                 error = zfs_secpolicy_hold(zc, innvl, cr);
1278         if (error == 0)
1279                 error = zfs_secpolicy_release(zc, innvl, cr);
1280         if (error == 0)
1281                 error = zfs_secpolicy_destroy(zc, innvl, cr);
1282         return (error);
1283 }
1284 
1285 /*
1286  * Returns the nvlist as specified by the user in the zfs_cmd_t.
1287  */
1288 static int
1289 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1290 {
1291         char *packed;
1292         int error;
1293         nvlist_t *list = NULL;
1294 
1295         /*
1296          * Read in and unpack the user-supplied nvlist.
1297          */
1298         if (size == 0)
1299                 return (SET_ERROR(EINVAL));
1300 
1301         packed = kmem_alloc(size, KM_SLEEP);
1302 
1303         if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1304             iflag)) != 0) {
1305                 kmem_free(packed, size);
1306                 return (error);
1307         }
1308 
1309         if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1310                 kmem_free(packed, size);
1311                 return (error);
1312         }
1313 
1314         kmem_free(packed, size);
1315 
1316         *nvp = list;
1317         return (0);
1318 }
1319 
1320 /*
1321  * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1322  * Entries will be removed from the end of the nvlist, and one int32 entry
1323  * named "N_MORE_ERRORS" will be added indicating how many entries were
1324  * removed.
1325  */
1326 static int
1327 nvlist_smush(nvlist_t *errors, size_t max)
1328 {
1329         size_t size;
1330 
1331         size = fnvlist_size(errors);
1332 
1333         if (size > max) {
1334                 nvpair_t *more_errors;
1335                 int n = 0;
1336 
1337                 if (max < 1024)
1338                         return (SET_ERROR(ENOMEM));
1339 
1340                 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1341                 more_errors = nvlist_prev_nvpair(errors, NULL);
1342 
1343                 do {
1344                         nvpair_t *pair = nvlist_prev_nvpair(errors,
1345                             more_errors);
1346                         fnvlist_remove_nvpair(errors, pair);
1347                         n++;
1348                         size = fnvlist_size(errors);
1349                 } while (size > max);
1350 
1351                 fnvlist_remove_nvpair(errors, more_errors);
1352                 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1353                 ASSERT3U(fnvlist_size(errors), <=, max);
1354         }
1355 
1356         return (0);
1357 }
1358 
1359 static int
1360 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1361 {
1362         char *packed = NULL;
1363         int error = 0;
1364         size_t size;
1365 
1366         size = fnvlist_size(nvl);
1367 
1368         if (size > zc->zc_nvlist_dst_size) {
1369                 error = SET_ERROR(ENOMEM);
1370         } else {
1371                 packed = fnvlist_pack(nvl, &size);
1372                 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1373                     size, zc->zc_iflags) != 0)
1374                         error = SET_ERROR(EFAULT);
1375                 fnvlist_pack_free(packed, size);
1376         }
1377 
1378         zc->zc_nvlist_dst_size = size;
1379         zc->zc_nvlist_dst_filled = B_TRUE;
1380         return (error);
1381 }
1382 
1383 static int
1384 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1385 {
1386         objset_t *os;
1387         int error;
1388 
1389         error = dmu_objset_hold(dsname, FTAG, &os);
1390         if (error != 0)
1391                 return (error);
1392         if (dmu_objset_type(os) != DMU_OST_ZFS) {
1393                 dmu_objset_rele(os, FTAG);
1394                 return (SET_ERROR(EINVAL));
1395         }
1396 
1397         mutex_enter(&os->os_user_ptr_lock);
1398         *zfvp = dmu_objset_get_user(os);
1399         if (*zfvp) {
1400                 VFS_HOLD((*zfvp)->z_vfs);
1401         } else {
1402                 error = SET_ERROR(ESRCH);
1403         }
1404         mutex_exit(&os->os_user_ptr_lock);
1405         dmu_objset_rele(os, FTAG);
1406         return (error);
1407 }
1408 
1409 /*
1410  * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1411  * case its z_vfs will be NULL, and it will be opened as the owner.
1412  * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1413  * which prevents all vnode ops from running.
1414  */
1415 static int
1416 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1417 {
1418         int error = 0;
1419 
1420         if (getzfsvfs(name, zfvp) != 0)
1421                 error = zfsvfs_create(name, zfvp);
1422         if (error == 0) {
1423                 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1424                     RW_READER, tag);
1425                 if ((*zfvp)->z_unmounted) {
1426                         /*
1427                          * XXX we could probably try again, since the unmounting
1428                          * thread should be just about to disassociate the
1429                          * objset from the zfsvfs.
1430                          */
1431                         rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1432                         return (SET_ERROR(EBUSY));
1433                 }
1434         }
1435         return (error);
1436 }
1437 
1438 static void
1439 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1440 {
1441         rrw_exit(&zfsvfs->z_teardown_lock, tag);
1442 
1443         if (zfsvfs->z_vfs) {
1444                 VFS_RELE(zfsvfs->z_vfs);
1445         } else {
1446                 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1447                 zfsvfs_free(zfsvfs);
1448         }
1449 }
1450 
1451 static int
1452 zfs_ioc_pool_create(zfs_cmd_t *zc)
1453 {
1454         int error;
1455         nvlist_t *config, *props = NULL;
1456         nvlist_t *rootprops = NULL;
1457         nvlist_t *zplprops = NULL;
1458 
1459         if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1460             zc->zc_iflags, &config))
1461                 return (error);
1462 
1463         if (zc->zc_nvlist_src_size != 0 && (error =
1464             get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1465             zc->zc_iflags, &props))) {
1466                 nvlist_free(config);
1467                 return (error);
1468         }
1469 
1470         if (props) {
1471                 nvlist_t *nvl = NULL;
1472                 uint64_t version = SPA_VERSION;
1473 
1474                 (void) nvlist_lookup_uint64(props,
1475                     zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1476                 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1477                         error = SET_ERROR(EINVAL);
1478                         goto pool_props_bad;
1479                 }
1480                 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1481                 if (nvl) {
1482                         error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1483                         if (error != 0) {
1484                                 nvlist_free(config);
1485                                 nvlist_free(props);
1486                                 return (error);
1487                         }
1488                         (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1489                 }
1490                 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1491                 error = zfs_fill_zplprops_root(version, rootprops,
1492                     zplprops, NULL);
1493                 if (error != 0)
1494                         goto pool_props_bad;
1495         }
1496 
1497         error = spa_create(zc->zc_name, config, props, zplprops);
1498 
1499         /*
1500          * Set the remaining root properties
1501          */
1502         if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1503             ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1504                 (void) spa_destroy(zc->zc_name);
1505 
1506 pool_props_bad:
1507         nvlist_free(rootprops);
1508         nvlist_free(zplprops);
1509         nvlist_free(config);
1510         nvlist_free(props);
1511 
1512         return (error);
1513 }
1514 
1515 static int
1516 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1517 {
1518         int error;
1519         zfs_log_history(zc);
1520         error = spa_destroy(zc->zc_name);
1521         if (error == 0)
1522                 zvol_remove_minors(zc->zc_name);
1523         return (error);
1524 }
1525 
1526 static int
1527 zfs_ioc_pool_import(zfs_cmd_t *zc)
1528 {
1529         nvlist_t *config, *props = NULL;
1530         uint64_t guid;
1531         int error;
1532 
1533         if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1534             zc->zc_iflags, &config)) != 0)
1535                 return (error);
1536 
1537         if (zc->zc_nvlist_src_size != 0 && (error =
1538             get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1539             zc->zc_iflags, &props))) {
1540                 nvlist_free(config);
1541                 return (error);
1542         }
1543 
1544         if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1545             guid != zc->zc_guid)
1546                 error = SET_ERROR(EINVAL);
1547         else
1548                 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1549 
1550         if (zc->zc_nvlist_dst != 0) {
1551                 int err;
1552 
1553                 if ((err = put_nvlist(zc, config)) != 0)
1554                         error = err;
1555         }
1556 
1557         nvlist_free(config);
1558 
1559         if (props)
1560                 nvlist_free(props);
1561 
1562         return (error);
1563 }
1564 
1565 static int
1566 zfs_ioc_pool_export(zfs_cmd_t *zc)
1567 {
1568         int error;
1569         boolean_t force = (boolean_t)zc->zc_cookie;
1570         boolean_t hardforce = (boolean_t)zc->zc_guid;
1571 
1572         zfs_log_history(zc);
1573         error = spa_export(zc->zc_name, NULL, force, hardforce);
1574         if (error == 0)
1575                 zvol_remove_minors(zc->zc_name);
1576         return (error);
1577 }
1578 
1579 static int
1580 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1581 {
1582         nvlist_t *configs;
1583         int error;
1584 
1585         if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1586                 return (SET_ERROR(EEXIST));
1587 
1588         error = put_nvlist(zc, configs);
1589 
1590         nvlist_free(configs);
1591 
1592         return (error);
1593 }
1594 
1595 /*
1596  * inputs:
1597  * zc_name              name of the pool
1598  *
1599  * outputs:
1600  * zc_cookie            real errno
1601  * zc_nvlist_dst        config nvlist
1602  * zc_nvlist_dst_size   size of config nvlist
1603  */
1604 static int
1605 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1606 {
1607         nvlist_t *config;
1608         int error;
1609         int ret = 0;
1610 
1611         error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1612             sizeof (zc->zc_value));
1613 
1614         if (config != NULL) {
1615                 ret = put_nvlist(zc, config);
1616                 nvlist_free(config);
1617 
1618                 /*
1619                  * The config may be present even if 'error' is non-zero.
1620                  * In this case we return success, and preserve the real errno
1621                  * in 'zc_cookie'.
1622                  */
1623                 zc->zc_cookie = error;
1624         } else {
1625                 ret = error;
1626         }
1627 
1628         return (ret);
1629 }
1630 
1631 /*
1632  * Try to import the given pool, returning pool stats as appropriate so that
1633  * user land knows which devices are available and overall pool health.
1634  */
1635 static int
1636 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1637 {
1638         nvlist_t *tryconfig, *config;
1639         int error;
1640 
1641         if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1642             zc->zc_iflags, &tryconfig)) != 0)
1643                 return (error);
1644 
1645         config = spa_tryimport(tryconfig);
1646 
1647         nvlist_free(tryconfig);
1648 
1649         if (config == NULL)
1650                 return (SET_ERROR(EINVAL));
1651 
1652         error = put_nvlist(zc, config);
1653         nvlist_free(config);
1654 
1655         return (error);
1656 }
1657 
1658 /*
1659  * inputs:
1660  * zc_name              name of the pool
1661  * zc_cookie            scan func (pool_scan_func_t)
1662  */
1663 static int
1664 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1665 {
1666         spa_t *spa;
1667         int error;
1668 
1669         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1670                 return (error);
1671 
1672         if (zc->zc_cookie == POOL_SCAN_NONE)
1673                 error = spa_scan_stop(spa);
1674         else
1675                 error = spa_scan(spa, zc->zc_cookie);
1676 
1677         spa_close(spa, FTAG);
1678 
1679         return (error);
1680 }
1681 
1682 static int
1683 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1684 {
1685         spa_t *spa;
1686         int error;
1687 
1688         error = spa_open(zc->zc_name, &spa, FTAG);
1689         if (error == 0) {
1690                 spa_freeze(spa);
1691                 spa_close(spa, FTAG);
1692         }
1693         return (error);
1694 }
1695 
1696 static int
1697 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1698 {
1699         spa_t *spa;
1700         int error;
1701 
1702         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1703                 return (error);
1704 
1705         if (zc->zc_cookie < spa_version(spa) ||
1706             !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1707                 spa_close(spa, FTAG);
1708                 return (SET_ERROR(EINVAL));
1709         }
1710 
1711         spa_upgrade(spa, zc->zc_cookie);
1712         spa_close(spa, FTAG);
1713 
1714         return (error);
1715 }
1716 
1717 static int
1718 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1719 {
1720         spa_t *spa;
1721         char *hist_buf;
1722         uint64_t size;
1723         int error;
1724 
1725         if ((size = zc->zc_history_len) == 0)
1726                 return (SET_ERROR(EINVAL));
1727 
1728         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1729                 return (error);
1730 
1731         if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1732                 spa_close(spa, FTAG);
1733                 return (SET_ERROR(ENOTSUP));
1734         }
1735 
1736         hist_buf = kmem_alloc(size, KM_SLEEP);
1737         if ((error = spa_history_get(spa, &zc->zc_history_offset,
1738             &zc->zc_history_len, hist_buf)) == 0) {
1739                 error = ddi_copyout(hist_buf,
1740                     (void *)(uintptr_t)zc->zc_history,
1741                     zc->zc_history_len, zc->zc_iflags);
1742         }
1743 
1744         spa_close(spa, FTAG);
1745         kmem_free(hist_buf, size);
1746         return (error);
1747 }
1748 
1749 static int
1750 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1751 {
1752         spa_t *spa;
1753         int error;
1754 
1755         error = spa_open(zc->zc_name, &spa, FTAG);
1756         if (error == 0) {
1757                 error = spa_change_guid(spa);
1758                 spa_close(spa, FTAG);
1759         }
1760         return (error);
1761 }
1762 
1763 static int
1764 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1765 {
1766         return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1767 }
1768 
1769 /*
1770  * inputs:
1771  * zc_name              name of filesystem
1772  * zc_obj               object to find
1773  *
1774  * outputs:
1775  * zc_value             name of object
1776  */
1777 static int
1778 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1779 {
1780         objset_t *os;
1781         int error;
1782 
1783         /* XXX reading from objset not owned */
1784         if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1785                 return (error);
1786         if (dmu_objset_type(os) != DMU_OST_ZFS) {
1787                 dmu_objset_rele(os, FTAG);
1788                 return (SET_ERROR(EINVAL));
1789         }
1790         error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1791             sizeof (zc->zc_value));
1792         dmu_objset_rele(os, FTAG);
1793 
1794         return (error);
1795 }
1796 
1797 /*
1798  * inputs:
1799  * zc_name              name of filesystem
1800  * zc_obj               object to find
1801  *
1802  * outputs:
1803  * zc_stat              stats on object
1804  * zc_value             path to object
1805  */
1806 static int
1807 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1808 {
1809         objset_t *os;
1810         int error;
1811 
1812         /* XXX reading from objset not owned */
1813         if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1814                 return (error);
1815         if (dmu_objset_type(os) != DMU_OST_ZFS) {
1816                 dmu_objset_rele(os, FTAG);
1817                 return (SET_ERROR(EINVAL));
1818         }
1819         error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1820             sizeof (zc->zc_value));
1821         dmu_objset_rele(os, FTAG);
1822 
1823         return (error);
1824 }
1825 
1826 static int
1827 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1828 {
1829         spa_t *spa;
1830         int error;
1831         nvlist_t *config, **l2cache, **spares;
1832         uint_t nl2cache = 0, nspares = 0;
1833 
1834         error = spa_open(zc->zc_name, &spa, FTAG);
1835         if (error != 0)
1836                 return (error);
1837 
1838         error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1839             zc->zc_iflags, &config);
1840         (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1841             &l2cache, &nl2cache);
1842 
1843         (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1844             &spares, &nspares);
1845 
1846         /*
1847          * A root pool with concatenated devices is not supported.
1848          * Thus, can not add a device to a root pool.
1849          *
1850          * Intent log device can not be added to a rootpool because
1851          * during mountroot, zil is replayed, a seperated log device
1852          * can not be accessed during the mountroot time.
1853          *
1854          * l2cache and spare devices are ok to be added to a rootpool.
1855          */
1856         if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1857                 nvlist_free(config);
1858                 spa_close(spa, FTAG);
1859                 return (SET_ERROR(EDOM));
1860         }
1861 
1862         if (error == 0) {
1863                 error = spa_vdev_add(spa, config);
1864                 nvlist_free(config);
1865         }
1866         spa_close(spa, FTAG);
1867         return (error);
1868 }
1869 
1870 /*
1871  * inputs:
1872  * zc_name              name of the pool
1873  * zc_nvlist_conf       nvlist of devices to remove
1874  * zc_cookie            to stop the remove?
1875  */
1876 static int
1877 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1878 {
1879         spa_t *spa;
1880         int error;
1881 
1882         error = spa_open(zc->zc_name, &spa, FTAG);
1883         if (error != 0)
1884                 return (error);
1885         error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1886         spa_close(spa, FTAG);
1887         return (error);
1888 }
1889 
1890 static int
1891 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1892 {
1893         spa_t *spa;
1894         int error;
1895         vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1896 
1897         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1898                 return (error);
1899         switch (zc->zc_cookie) {
1900         case VDEV_STATE_ONLINE:
1901                 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1902                 break;
1903 
1904         case VDEV_STATE_OFFLINE:
1905                 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1906                 break;
1907 
1908         case VDEV_STATE_FAULTED:
1909                 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1910                     zc->zc_obj != VDEV_AUX_EXTERNAL)
1911                         zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1912 
1913                 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1914                 break;
1915 
1916         case VDEV_STATE_DEGRADED:
1917                 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1918                     zc->zc_obj != VDEV_AUX_EXTERNAL)
1919                         zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1920 
1921                 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1922                 break;
1923 
1924         default:
1925                 error = SET_ERROR(EINVAL);
1926         }
1927         zc->zc_cookie = newstate;
1928         spa_close(spa, FTAG);
1929         return (error);
1930 }
1931 
1932 static int
1933 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1934 {
1935         spa_t *spa;
1936         int replacing = zc->zc_cookie;
1937         nvlist_t *config;
1938         int error;
1939 
1940         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1941                 return (error);
1942 
1943         if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1944             zc->zc_iflags, &config)) == 0) {
1945                 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1946                 nvlist_free(config);
1947         }
1948 
1949         spa_close(spa, FTAG);
1950         return (error);
1951 }
1952 
1953 static int
1954 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1955 {
1956         spa_t *spa;
1957         int error;
1958 
1959         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1960                 return (error);
1961 
1962         error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1963 
1964         spa_close(spa, FTAG);
1965         return (error);
1966 }
1967 
1968 static int
1969 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1970 {
1971         spa_t *spa;
1972         nvlist_t *config, *props = NULL;
1973         int error;
1974         boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1975 
1976         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1977                 return (error);
1978 
1979         if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1980             zc->zc_iflags, &config)) {
1981                 spa_close(spa, FTAG);
1982                 return (error);
1983         }
1984 
1985         if (zc->zc_nvlist_src_size != 0 && (error =
1986             get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1987             zc->zc_iflags, &props))) {
1988                 spa_close(spa, FTAG);
1989                 nvlist_free(config);
1990                 return (error);
1991         }
1992 
1993         error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1994 
1995         spa_close(spa, FTAG);
1996 
1997         nvlist_free(config);
1998         nvlist_free(props);
1999 
2000         return (error);
2001 }
2002 
2003 static int
2004 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
2005 {
2006         spa_t *spa;
2007         char *path = zc->zc_value;
2008         uint64_t guid = zc->zc_guid;
2009         int error;
2010 
2011         error = spa_open(zc->zc_name, &spa, FTAG);
2012         if (error != 0)
2013                 return (error);
2014 
2015         error = spa_vdev_setpath(spa, guid, path);
2016         spa_close(spa, FTAG);
2017         return (error);
2018 }
2019 
2020 static int
2021 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
2022 {
2023         spa_t *spa;
2024         char *fru = zc->zc_value;
2025         uint64_t guid = zc->zc_guid;
2026         int error;
2027 
2028         error = spa_open(zc->zc_name, &spa, FTAG);
2029         if (error != 0)
2030                 return (error);
2031 
2032         error = spa_vdev_setfru(spa, guid, fru);
2033         spa_close(spa, FTAG);
2034         return (error);
2035 }
2036 
2037 static int
2038 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
2039 {
2040         int error = 0;
2041         nvlist_t *nv;
2042 
2043         dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2044 
2045         if (zc->zc_nvlist_dst != 0 &&
2046             (error = dsl_prop_get_all(os, &nv)) == 0) {
2047                 dmu_objset_stats(os, nv);
2048                 /*
2049                  * NB: zvol_get_stats() will read the objset contents,
2050                  * which we aren't supposed to do with a
2051                  * DS_MODE_USER hold, because it could be
2052                  * inconsistent.  So this is a bit of a workaround...
2053                  * XXX reading with out owning
2054                  */
2055                 if (!zc->zc_objset_stats.dds_inconsistent &&
2056                     dmu_objset_type(os) == DMU_OST_ZVOL) {
2057                         error = zvol_get_stats(os, nv);
2058                         if (error == EIO)
2059                                 return (error);
2060                         VERIFY0(error);
2061                 }
2062                 error = put_nvlist(zc, nv);
2063                 nvlist_free(nv);
2064         }
2065 
2066         return (error);
2067 }
2068 
2069 /*
2070  * inputs:
2071  * zc_name              name of filesystem
2072  * zc_nvlist_dst_size   size of buffer for property nvlist
2073  *
2074  * outputs:
2075  * zc_objset_stats      stats
2076  * zc_nvlist_dst        property nvlist
2077  * zc_nvlist_dst_size   size of property nvlist
2078  */
2079 static int
2080 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2081 {
2082         objset_t *os;
2083         int error;
2084 
2085         error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2086         if (error == 0) {
2087                 error = zfs_ioc_objset_stats_impl(zc, os);
2088                 dmu_objset_rele(os, FTAG);
2089         }
2090 
2091         return (error);
2092 }
2093 
2094 /*
2095  * inputs:
2096  * zc_name              name of filesystem
2097  * zc_nvlist_dst_size   size of buffer for property nvlist
2098  *
2099  * outputs:
2100  * zc_nvlist_dst        received property nvlist
2101  * zc_nvlist_dst_size   size of received property nvlist
2102  *
2103  * Gets received properties (distinct from local properties on or after
2104  * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2105  * local property values.
2106  */
2107 static int
2108 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2109 {
2110         int error = 0;
2111         nvlist_t *nv;
2112 
2113         /*
2114          * Without this check, we would return local property values if the
2115          * caller has not already received properties on or after
2116          * SPA_VERSION_RECVD_PROPS.
2117          */
2118         if (!dsl_prop_get_hasrecvd(zc->zc_name))
2119                 return (SET_ERROR(ENOTSUP));
2120 
2121         if (zc->zc_nvlist_dst != 0 &&
2122             (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2123                 error = put_nvlist(zc, nv);
2124                 nvlist_free(nv);
2125         }
2126 
2127         return (error);
2128 }
2129 
2130 static int
2131 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2132 {
2133         uint64_t value;
2134         int error;
2135 
2136         /*
2137          * zfs_get_zplprop() will either find a value or give us
2138          * the default value (if there is one).
2139          */
2140         if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2141                 return (error);
2142         VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2143         return (0);
2144 }
2145 
2146 /*
2147  * inputs:
2148  * zc_name              name of filesystem
2149  * zc_nvlist_dst_size   size of buffer for zpl property nvlist
2150  *
2151  * outputs:
2152  * zc_nvlist_dst        zpl property nvlist
2153  * zc_nvlist_dst_size   size of zpl property nvlist
2154  */
2155 static int
2156 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2157 {
2158         objset_t *os;
2159         int err;
2160 
2161         /* XXX reading without owning */
2162         if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2163                 return (err);
2164 
2165         dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2166 
2167         /*
2168          * NB: nvl_add_zplprop() will read the objset contents,
2169          * which we aren't supposed to do with a DS_MODE_USER
2170          * hold, because it could be inconsistent.
2171          */
2172         if (zc->zc_nvlist_dst != NULL &&
2173             !zc->zc_objset_stats.dds_inconsistent &&
2174             dmu_objset_type(os) == DMU_OST_ZFS) {
2175                 nvlist_t *nv;
2176 
2177                 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2178                 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2179                     (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2180                     (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2181                     (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2182                         err = put_nvlist(zc, nv);
2183                 nvlist_free(nv);
2184         } else {
2185                 err = SET_ERROR(ENOENT);
2186         }
2187         dmu_objset_rele(os, FTAG);
2188         return (err);
2189 }
2190 
2191 static boolean_t
2192 dataset_name_hidden(const char *name)
2193 {
2194         /*
2195          * Skip over datasets that are not visible in this zone,
2196          * internal datasets (which have a $ in their name), and
2197          * temporary datasets (which have a % in their name).
2198          */
2199         if (strchr(name, '$') != NULL)
2200                 return (B_TRUE);
2201         if (strchr(name, '%') != NULL)
2202                 return (B_TRUE);
2203         if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2204                 return (B_TRUE);
2205         return (B_FALSE);
2206 }
2207 
2208 /*
2209  * inputs:
2210  * zc_name              name of filesystem
2211  * zc_cookie            zap cursor
2212  * zc_nvlist_dst_size   size of buffer for property nvlist
2213  *
2214  * outputs:
2215  * zc_name              name of next filesystem
2216  * zc_cookie            zap cursor
2217  * zc_objset_stats      stats
2218  * zc_nvlist_dst        property nvlist
2219  * zc_nvlist_dst_size   size of property nvlist
2220  */
2221 static int
2222 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2223 {
2224         objset_t *os;
2225         int error;
2226         char *p;
2227         size_t orig_len = strlen(zc->zc_name);
2228 
2229 top:
2230         if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2231                 if (error == ENOENT)
2232                         error = SET_ERROR(ESRCH);
2233                 return (error);
2234         }
2235 
2236         p = strrchr(zc->zc_name, '/');
2237         if (p == NULL || p[1] != '\0')
2238                 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2239         p = zc->zc_name + strlen(zc->zc_name);
2240 
2241         do {
2242                 error = dmu_dir_list_next(os,
2243                     sizeof (zc->zc_name) - (p - zc->zc_name), p,
2244                     NULL, &zc->zc_cookie);
2245                 if (error == ENOENT)
2246                         error = SET_ERROR(ESRCH);
2247         } while (error == 0 && dataset_name_hidden(zc->zc_name));
2248         dmu_objset_rele(os, FTAG);
2249 
2250         /*
2251          * If it's an internal dataset (ie. with a '$' in its name),
2252          * don't try to get stats for it, otherwise we'll return ENOENT.
2253          */
2254         if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2255                 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2256                 if (error == ENOENT) {
2257                         /* We lost a race with destroy, get the next one. */
2258                         zc->zc_name[orig_len] = '\0';
2259                         goto top;
2260                 }
2261         }
2262         return (error);
2263 }
2264 
2265 /*
2266  * inputs:
2267  * zc_name              name of filesystem
2268  * zc_cookie            zap cursor
2269  * zc_nvlist_dst_size   size of buffer for property nvlist
2270  *
2271  * outputs:
2272  * zc_name              name of next snapshot
2273  * zc_objset_stats      stats
2274  * zc_nvlist_dst        property nvlist
2275  * zc_nvlist_dst_size   size of property nvlist
2276  */
2277 static int
2278 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2279 {
2280         objset_t *os;
2281         int error;
2282 
2283         error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2284         if (error != 0) {
2285                 return (error == ENOENT ? ESRCH : error);
2286         }
2287 
2288         /*
2289          * A dataset name of maximum length cannot have any snapshots,
2290          * so exit immediately.
2291          */
2292         if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2293                 dmu_objset_rele(os, FTAG);
2294                 return (SET_ERROR(ESRCH));
2295         }
2296 
2297         error = dmu_snapshot_list_next(os,
2298             sizeof (zc->zc_name) - strlen(zc->zc_name),
2299             zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2300             NULL);
2301 
2302         if (error == 0) {
2303                 dsl_dataset_t *ds;
2304                 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2305 
2306                 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2307                 if (error == 0) {
2308                         objset_t *ossnap;
2309 
2310                         error = dmu_objset_from_ds(ds, &ossnap);
2311                         if (error == 0)
2312                                 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2313                         dsl_dataset_rele(ds, FTAG);
2314                 }
2315         } else if (error == ENOENT) {
2316                 error = SET_ERROR(ESRCH);
2317         }
2318 
2319         dmu_objset_rele(os, FTAG);
2320         /* if we failed, undo the @ that we tacked on to zc_name */
2321         if (error != 0)
2322                 *strchr(zc->zc_name, '@') = '\0';
2323         return (error);
2324 }
2325 
2326 static int
2327 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2328 {
2329         const char *propname = nvpair_name(pair);
2330         uint64_t *valary;
2331         unsigned int vallen;
2332         const char *domain;
2333         char *dash;
2334         zfs_userquota_prop_t type;
2335         uint64_t rid;
2336         uint64_t quota;
2337         zfsvfs_t *zfsvfs;
2338         int err;
2339 
2340         if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2341                 nvlist_t *attrs;
2342                 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2343                 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2344                     &pair) != 0)
2345                         return (SET_ERROR(EINVAL));
2346         }
2347 
2348         /*
2349          * A correctly constructed propname is encoded as
2350          * userquota@<rid>-<domain>.
2351          */
2352         if ((dash = strchr(propname, '-')) == NULL ||
2353             nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2354             vallen != 3)
2355                 return (SET_ERROR(EINVAL));
2356 
2357         domain = dash + 1;
2358         type = valary[0];
2359         rid = valary[1];
2360         quota = valary[2];
2361 
2362         err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2363         if (err == 0) {
2364                 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2365                 zfsvfs_rele(zfsvfs, FTAG);
2366         }
2367 
2368         return (err);
2369 }
2370 
2371 /*
2372  * If the named property is one that has a special function to set its value,
2373  * return 0 on success and a positive error code on failure; otherwise if it is
2374  * not one of the special properties handled by this function, return -1.
2375  *
2376  * XXX: It would be better for callers of the property interface if we handled
2377  * these special cases in dsl_prop.c (in the dsl layer).
2378  */
2379 static int
2380 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2381     nvpair_t *pair)
2382 {
2383         const char *propname = nvpair_name(pair);
2384         zfs_prop_t prop = zfs_name_to_prop(propname);
2385         uint64_t intval;
2386         int err;
2387 
2388         if (prop == ZPROP_INVAL) {
2389                 if (zfs_prop_userquota(propname))
2390                         return (zfs_prop_set_userquota(dsname, pair));
2391                 return (-1);
2392         }
2393 
2394         if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2395                 nvlist_t *attrs;
2396                 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2397                 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2398                     &pair) == 0);
2399         }
2400 
2401         if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2402                 return (-1);
2403 
2404         VERIFY(0 == nvpair_value_uint64(pair, &intval));
2405 
2406         switch (prop) {
2407         case ZFS_PROP_QUOTA:
2408                 err = dsl_dir_set_quota(dsname, source, intval);
2409                 break;
2410         case ZFS_PROP_REFQUOTA:
2411                 err = dsl_dataset_set_refquota(dsname, source, intval);
2412                 break;
2413         case ZFS_PROP_FILESYSTEM_LIMIT:
2414         case ZFS_PROP_SNAPSHOT_LIMIT:
2415                 if (intval == UINT64_MAX) {
2416                         /* clearing the limit, just do it */
2417                         err = 0;
2418                 } else {
2419                         err = dsl_dir_activate_fs_ss_limit(dsname);
2420                 }
2421                 /*
2422                  * Set err to -1 to force the zfs_set_prop_nvlist code down the
2423                  * default path to set the value in the nvlist.
2424                  */
2425                 if (err == 0)
2426                         err = -1;
2427                 break;
2428         case ZFS_PROP_RESERVATION:
2429                 err = dsl_dir_set_reservation(dsname, source, intval);
2430                 break;
2431         case ZFS_PROP_REFRESERVATION:
2432                 err = dsl_dataset_set_refreservation(dsname, source, intval);
2433                 break;
2434         case ZFS_PROP_VOLSIZE:
2435                 err = zvol_set_volsize(dsname, intval);
2436                 break;
2437         case ZFS_PROP_VERSION:
2438         {
2439                 zfsvfs_t *zfsvfs;
2440 
2441                 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2442                         break;
2443 
2444                 err = zfs_set_version(zfsvfs, intval);
2445                 zfsvfs_rele(zfsvfs, FTAG);
2446 
2447                 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2448                         zfs_cmd_t *zc;
2449 
2450                         zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2451                         (void) strcpy(zc->zc_name, dsname);
2452                         (void) zfs_ioc_userspace_upgrade(zc);
2453                         kmem_free(zc, sizeof (zfs_cmd_t));
2454                 }
2455                 break;
2456         }































2457         default:
2458                 err = -1;
2459         }
2460 
2461         return (err);
2462 }
2463 
2464 /*
2465  * This function is best effort. If it fails to set any of the given properties,
2466  * it continues to set as many as it can and returns the last error
2467  * encountered. If the caller provides a non-NULL errlist, it will be filled in
2468  * with the list of names of all the properties that failed along with the
2469  * corresponding error numbers.
2470  *
2471  * If every property is set successfully, zero is returned and errlist is not
2472  * modified.
2473  */
2474 int
2475 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2476     nvlist_t *errlist)
2477 {
2478         nvpair_t *pair;
2479         nvpair_t *propval;
2480         int rv = 0;
2481         uint64_t intval;
2482         char *strval;
2483         nvlist_t *genericnvl = fnvlist_alloc();
2484         nvlist_t *retrynvl = fnvlist_alloc();
2485 
2486 retry:
2487         pair = NULL;
2488         while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2489                 const char *propname = nvpair_name(pair);
2490                 zfs_prop_t prop = zfs_name_to_prop(propname);
2491                 int err = 0;
2492 
2493                 /* decode the property value */
2494                 propval = pair;
2495                 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2496                         nvlist_t *attrs;
2497                         attrs = fnvpair_value_nvlist(pair);
2498                         if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2499                             &propval) != 0)
2500                                 err = SET_ERROR(EINVAL);
2501                 }
2502 
2503                 /* Validate value type */
2504                 if (err == 0 && prop == ZPROP_INVAL) {
2505                         if (zfs_prop_user(propname)) {
2506                                 if (nvpair_type(propval) != DATA_TYPE_STRING)
2507                                         err = SET_ERROR(EINVAL);
2508                         } else if (zfs_prop_userquota(propname)) {
2509                                 if (nvpair_type(propval) !=
2510                                     DATA_TYPE_UINT64_ARRAY)
2511                                         err = SET_ERROR(EINVAL);
2512                         } else {
2513                                 err = SET_ERROR(EINVAL);
2514                         }
2515                 } else if (err == 0) {
2516                         if (nvpair_type(propval) == DATA_TYPE_STRING) {
2517                                 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2518                                         err = SET_ERROR(EINVAL);
2519                         } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2520                                 const char *unused;
2521 
2522                                 intval = fnvpair_value_uint64(propval);
2523 
2524                                 switch (zfs_prop_get_type(prop)) {
2525                                 case PROP_TYPE_NUMBER:
2526                                         break;
2527                                 case PROP_TYPE_STRING:
2528                                         err = SET_ERROR(EINVAL);
2529                                         break;
2530                                 case PROP_TYPE_INDEX:
2531                                         if (zfs_prop_index_to_string(prop,
2532                                             intval, &unused) != 0)
2533                                                 err = SET_ERROR(EINVAL);
2534                                         break;
2535                                 default:
2536                                         cmn_err(CE_PANIC,
2537                                             "unknown property type");
2538                                 }
2539                         } else {
2540                                 err = SET_ERROR(EINVAL);
2541                         }
2542                 }
2543 
2544                 /* Validate permissions */
2545                 if (err == 0)
2546                         err = zfs_check_settable(dsname, pair, CRED());
2547 
2548                 if (err == 0) {
2549                         err = zfs_prop_set_special(dsname, source, pair);
2550                         if (err == -1) {
2551                                 /*
2552                                  * For better performance we build up a list of
2553                                  * properties to set in a single transaction.
2554                                  */
2555                                 err = nvlist_add_nvpair(genericnvl, pair);
2556                         } else if (err != 0 && nvl != retrynvl) {
2557                                 /*
2558                                  * This may be a spurious error caused by
2559                                  * receiving quota and reservation out of order.
2560                                  * Try again in a second pass.
2561                                  */
2562                                 err = nvlist_add_nvpair(retrynvl, pair);
2563                         }
2564                 }
2565 
2566                 if (err != 0) {
2567                         if (errlist != NULL)
2568                                 fnvlist_add_int32(errlist, propname, err);
2569                         rv = err;
2570                 }
2571         }
2572 
2573         if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2574                 nvl = retrynvl;
2575                 goto retry;
2576         }
2577 
2578         if (!nvlist_empty(genericnvl) &&
2579             dsl_props_set(dsname, source, genericnvl) != 0) {
2580                 /*
2581                  * If this fails, we still want to set as many properties as we
2582                  * can, so try setting them individually.
2583                  */
2584                 pair = NULL;
2585                 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2586                         const char *propname = nvpair_name(pair);
2587                         int err = 0;
2588 
2589                         propval = pair;
2590                         if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2591                                 nvlist_t *attrs;
2592                                 attrs = fnvpair_value_nvlist(pair);
2593                                 propval = fnvlist_lookup_nvpair(attrs,
2594                                     ZPROP_VALUE);
2595                         }
2596 
2597                         if (nvpair_type(propval) == DATA_TYPE_STRING) {
2598                                 strval = fnvpair_value_string(propval);
2599                                 err = dsl_prop_set_string(dsname, propname,
2600                                     source, strval);
2601                         } else {
2602                                 intval = fnvpair_value_uint64(propval);
2603                                 err = dsl_prop_set_int(dsname, propname, source,
2604                                     intval);
2605                         }
2606 
2607                         if (err != 0) {
2608                                 if (errlist != NULL) {
2609                                         fnvlist_add_int32(errlist, propname,
2610                                             err);
2611                                 }
2612                                 rv = err;
2613                         }
2614                 }
2615         }
2616         nvlist_free(genericnvl);
2617         nvlist_free(retrynvl);
2618 
2619         return (rv);
2620 }
2621 
2622 /*
2623  * Check that all the properties are valid user properties.
2624  */
2625 static int
2626 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2627 {
2628         nvpair_t *pair = NULL;
2629         int error = 0;
2630 
2631         while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2632                 const char *propname = nvpair_name(pair);
2633 
2634                 if (!zfs_prop_user(propname) ||
2635                     nvpair_type(pair) != DATA_TYPE_STRING)
2636                         return (SET_ERROR(EINVAL));
2637 
2638                 if (error = zfs_secpolicy_write_perms(fsname,
2639                     ZFS_DELEG_PERM_USERPROP, CRED()))
2640                         return (error);
2641 
2642                 if (strlen(propname) >= ZAP_MAXNAMELEN)
2643                         return (SET_ERROR(ENAMETOOLONG));
2644 
2645                 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN)
2646                         return (E2BIG);
2647         }
2648         return (0);
2649 }
2650 
2651 static void
2652 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2653 {
2654         nvpair_t *pair;
2655 
2656         VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2657 
2658         pair = NULL;
2659         while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2660                 if (nvlist_exists(skipped, nvpair_name(pair)))
2661                         continue;
2662 
2663                 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2664         }
2665 }
2666 
2667 static int
2668 clear_received_props(const char *dsname, nvlist_t *props,
2669     nvlist_t *skipped)
2670 {
2671         int err = 0;
2672         nvlist_t *cleared_props = NULL;
2673         props_skip(props, skipped, &cleared_props);
2674         if (!nvlist_empty(cleared_props)) {
2675                 /*
2676                  * Acts on local properties until the dataset has received
2677                  * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2678                  */
2679                 zprop_source_t flags = (ZPROP_SRC_NONE |
2680                     (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2681                 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2682         }
2683         nvlist_free(cleared_props);
2684         return (err);
2685 }
2686 
2687 /*
2688  * inputs:
2689  * zc_name              name of filesystem
2690  * zc_value             name of property to set
2691  * zc_nvlist_src{_size} nvlist of properties to apply
2692  * zc_cookie            received properties flag
2693  *
2694  * outputs:
2695  * zc_nvlist_dst{_size} error for each unapplied received property
2696  */
2697 static int
2698 zfs_ioc_set_prop(zfs_cmd_t *zc)
2699 {
2700         nvlist_t *nvl;
2701         boolean_t received = zc->zc_cookie;
2702         zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2703             ZPROP_SRC_LOCAL);
2704         nvlist_t *errors;
2705         int error;
2706 
2707         if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2708             zc->zc_iflags, &nvl)) != 0)
2709                 return (error);
2710 
2711         if (received) {
2712                 nvlist_t *origprops;
2713 
2714                 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2715                         (void) clear_received_props(zc->zc_name,
2716                             origprops, nvl);
2717                         nvlist_free(origprops);
2718                 }
2719 
2720                 error = dsl_prop_set_hasrecvd(zc->zc_name);
2721         }
2722 
2723         errors = fnvlist_alloc();
2724         if (error == 0)
2725                 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2726 
2727         if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2728                 (void) put_nvlist(zc, errors);
2729         }
2730 
2731         nvlist_free(errors);
2732         nvlist_free(nvl);
2733         return (error);
2734 }
2735 
2736 /*
2737  * inputs:
2738  * zc_name              name of filesystem
2739  * zc_value             name of property to inherit
2740  * zc_cookie            revert to received value if TRUE
2741  *
2742  * outputs:             none
2743  */
2744 static int
2745 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2746 {
2747         const char *propname = zc->zc_value;
2748         zfs_prop_t prop = zfs_name_to_prop(propname);
2749         boolean_t received = zc->zc_cookie;
2750         zprop_source_t source = (received
2751             ? ZPROP_SRC_NONE            /* revert to received value, if any */
2752             : ZPROP_SRC_INHERITED);     /* explicitly inherit */
2753 
2754         if (received) {
2755                 nvlist_t *dummy;
2756                 nvpair_t *pair;
2757                 zprop_type_t type;
2758                 int err;
2759 
2760                 /*
2761                  * zfs_prop_set_special() expects properties in the form of an
2762                  * nvpair with type info.
2763                  */
2764                 if (prop == ZPROP_INVAL) {
2765                         if (!zfs_prop_user(propname))
2766                                 return (SET_ERROR(EINVAL));
2767 
2768                         type = PROP_TYPE_STRING;
2769                 } else if (prop == ZFS_PROP_VOLSIZE ||
2770                     prop == ZFS_PROP_VERSION) {
2771                         return (SET_ERROR(EINVAL));
2772                 } else {
2773                         type = zfs_prop_get_type(prop);
2774                 }
2775 
2776                 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2777 
2778                 switch (type) {
2779                 case PROP_TYPE_STRING:
2780                         VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2781                         break;
2782                 case PROP_TYPE_NUMBER:
2783                 case PROP_TYPE_INDEX:
2784                         VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2785                         break;
2786                 default:
2787                         nvlist_free(dummy);
2788                         return (SET_ERROR(EINVAL));
2789                 }
2790 
2791                 pair = nvlist_next_nvpair(dummy, NULL);
2792                 err = zfs_prop_set_special(zc->zc_name, source, pair);
2793                 nvlist_free(dummy);
2794                 if (err != -1)
2795                         return (err); /* special property already handled */
2796         } else {
2797                 /*
2798                  * Only check this in the non-received case. We want to allow
2799                  * 'inherit -S' to revert non-inheritable properties like quota
2800                  * and reservation to the received or default values even though
2801                  * they are not considered inheritable.
2802                  */
2803                 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2804                         return (SET_ERROR(EINVAL));
2805         }
2806 
2807         /* property name has been validated by zfs_secpolicy_inherit_prop() */
2808         return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2809 }
2810 
2811 static int
2812 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2813 {
2814         nvlist_t *props;
2815         spa_t *spa;
2816         int error;
2817         nvpair_t *pair;
2818 
2819         if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2820             zc->zc_iflags, &props))
2821                 return (error);
2822 
2823         /*
2824          * If the only property is the configfile, then just do a spa_lookup()
2825          * to handle the faulted case.
2826          */
2827         pair = nvlist_next_nvpair(props, NULL);
2828         if (pair != NULL && strcmp(nvpair_name(pair),
2829             zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2830             nvlist_next_nvpair(props, pair) == NULL) {
2831                 mutex_enter(&spa_namespace_lock);
2832                 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2833                         spa_configfile_set(spa, props, B_FALSE);
2834                         spa_config_sync(spa, B_FALSE, B_TRUE);
2835                 }
2836                 mutex_exit(&spa_namespace_lock);
2837                 if (spa != NULL) {
2838                         nvlist_free(props);
2839                         return (0);
2840                 }
2841         }
2842 
2843         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2844                 nvlist_free(props);
2845                 return (error);
2846         }
2847 
2848         error = spa_prop_set(spa, props);
2849 
2850         nvlist_free(props);
2851         spa_close(spa, FTAG);
2852 
2853         return (error);
2854 }
2855 
2856 static int
2857 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2858 {
2859         spa_t *spa;
2860         int error;
2861         nvlist_t *nvp = NULL;
2862 
2863         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2864                 /*
2865                  * If the pool is faulted, there may be properties we can still
2866                  * get (such as altroot and cachefile), so attempt to get them
2867                  * anyway.
2868                  */
2869                 mutex_enter(&spa_namespace_lock);
2870                 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2871                         error = spa_prop_get(spa, &nvp);
2872                 mutex_exit(&spa_namespace_lock);
2873         } else {
2874                 error = spa_prop_get(spa, &nvp);
2875                 spa_close(spa, FTAG);
2876         }
2877 
2878         if (error == 0 && zc->zc_nvlist_dst != NULL)
2879                 error = put_nvlist(zc, nvp);
2880         else
2881                 error = SET_ERROR(EFAULT);
2882 
2883         nvlist_free(nvp);
2884         return (error);
2885 }
2886 
2887 /*
2888  * inputs:
2889  * zc_name              name of filesystem
2890  * zc_nvlist_src{_size} nvlist of delegated permissions
2891  * zc_perm_action       allow/unallow flag
2892  *
2893  * outputs:             none
2894  */
2895 static int
2896 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2897 {
2898         int error;
2899         nvlist_t *fsaclnv = NULL;
2900 
2901         if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2902             zc->zc_iflags, &fsaclnv)) != 0)
2903                 return (error);
2904 
2905         /*
2906          * Verify nvlist is constructed correctly
2907          */
2908         if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2909                 nvlist_free(fsaclnv);
2910                 return (SET_ERROR(EINVAL));
2911         }
2912 
2913         /*
2914          * If we don't have PRIV_SYS_MOUNT, then validate
2915          * that user is allowed to hand out each permission in
2916          * the nvlist(s)
2917          */
2918 
2919         error = secpolicy_zfs(CRED());
2920         if (error != 0) {
2921                 if (zc->zc_perm_action == B_FALSE) {
2922                         error = dsl_deleg_can_allow(zc->zc_name,
2923                             fsaclnv, CRED());
2924                 } else {
2925                         error = dsl_deleg_can_unallow(zc->zc_name,
2926                             fsaclnv, CRED());
2927                 }
2928         }
2929 
2930         if (error == 0)
2931                 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2932 
2933         nvlist_free(fsaclnv);
2934         return (error);
2935 }
2936 
2937 /*
2938  * inputs:
2939  * zc_name              name of filesystem
2940  *
2941  * outputs:
2942  * zc_nvlist_src{_size} nvlist of delegated permissions
2943  */
2944 static int
2945 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2946 {
2947         nvlist_t *nvp;
2948         int error;
2949 
2950         if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2951                 error = put_nvlist(zc, nvp);
2952                 nvlist_free(nvp);
2953         }
2954 
2955         return (error);
2956 }
2957 
2958 /*
2959  * Search the vfs list for a specified resource.  Returns a pointer to it
2960  * or NULL if no suitable entry is found. The caller of this routine
2961  * is responsible for releasing the returned vfs pointer.
2962  */
2963 static vfs_t *
2964 zfs_get_vfs(const char *resource)
2965 {
2966         struct vfs *vfsp;
2967         struct vfs *vfs_found = NULL;
2968 
2969         vfs_list_read_lock();
2970         vfsp = rootvfs;
2971         do {
2972                 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2973                         VFS_HOLD(vfsp);
2974                         vfs_found = vfsp;
2975                         break;
2976                 }
2977                 vfsp = vfsp->vfs_next;
2978         } while (vfsp != rootvfs);
2979         vfs_list_unlock();
2980         return (vfs_found);
2981 }
2982 
2983 /* ARGSUSED */
2984 static void
2985 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2986 {
2987         zfs_creat_t *zct = arg;
2988 
2989         zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2990 }
2991 
2992 #define ZFS_PROP_UNDEFINED      ((uint64_t)-1)
2993 
2994 /*
2995  * inputs:
2996  * os                   parent objset pointer (NULL if root fs)
2997  * fuids_ok             fuids allowed in this version of the spa?
2998  * sa_ok                SAs allowed in this version of the spa?
2999  * createprops          list of properties requested by creator
3000  *
3001  * outputs:
3002  * zplprops     values for the zplprops we attach to the master node object
3003  * is_ci        true if requested file system will be purely case-insensitive
3004  *
3005  * Determine the settings for utf8only, normalization and
3006  * casesensitivity.  Specific values may have been requested by the
3007  * creator and/or we can inherit values from the parent dataset.  If
3008  * the file system is of too early a vintage, a creator can not
3009  * request settings for these properties, even if the requested
3010  * setting is the default value.  We don't actually want to create dsl
3011  * properties for these, so remove them from the source nvlist after
3012  * processing.
3013  */
3014 static int
3015 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
3016     boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
3017     nvlist_t *zplprops, boolean_t *is_ci)
3018 {
3019         uint64_t sense = ZFS_PROP_UNDEFINED;
3020         uint64_t norm = ZFS_PROP_UNDEFINED;
3021         uint64_t u8 = ZFS_PROP_UNDEFINED;
3022 
3023         ASSERT(zplprops != NULL);
3024 
3025         /*
3026          * Pull out creator prop choices, if any.
3027          */
3028         if (createprops) {
3029                 (void) nvlist_lookup_uint64(createprops,
3030                     zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
3031                 (void) nvlist_lookup_uint64(createprops,
3032                     zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
3033                 (void) nvlist_remove_all(createprops,
3034                     zfs_prop_to_name(ZFS_PROP_NORMALIZE));
3035                 (void) nvlist_lookup_uint64(createprops,
3036                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
3037                 (void) nvlist_remove_all(createprops,
3038                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
3039                 (void) nvlist_lookup_uint64(createprops,
3040                     zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3041                 (void) nvlist_remove_all(createprops,
3042                     zfs_prop_to_name(ZFS_PROP_CASE));
3043         }
3044 
3045         /*
3046          * If the zpl version requested is whacky or the file system
3047          * or pool is version is too "young" to support normalization
3048          * and the creator tried to set a value for one of the props,
3049          * error out.
3050          */
3051         if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3052             (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3053             (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3054             (zplver < ZPL_VERSION_NORMALIZATION &&
3055             (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3056             sense != ZFS_PROP_UNDEFINED)))
3057                 return (SET_ERROR(ENOTSUP));
3058 
3059         /*
3060          * Put the version in the zplprops
3061          */
3062         VERIFY(nvlist_add_uint64(zplprops,
3063             zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3064 
3065         if (norm == ZFS_PROP_UNDEFINED)
3066                 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3067         VERIFY(nvlist_add_uint64(zplprops,
3068             zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3069 
3070         /*
3071          * If we're normalizing, names must always be valid UTF-8 strings.
3072          */
3073         if (norm)
3074                 u8 = 1;
3075         if (u8 == ZFS_PROP_UNDEFINED)
3076                 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3077         VERIFY(nvlist_add_uint64(zplprops,
3078             zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3079 
3080         if (sense == ZFS_PROP_UNDEFINED)
3081                 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3082         VERIFY(nvlist_add_uint64(zplprops,
3083             zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3084 
3085         if (is_ci)
3086                 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3087 
3088         return (0);
3089 }
3090 
3091 static int
3092 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3093     nvlist_t *zplprops, boolean_t *is_ci)
3094 {
3095         boolean_t fuids_ok, sa_ok;
3096         uint64_t zplver = ZPL_VERSION;
3097         objset_t *os = NULL;
3098         char parentname[MAXNAMELEN];
3099         char *cp;
3100         spa_t *spa;
3101         uint64_t spa_vers;
3102         int error;
3103 
3104         (void) strlcpy(parentname, dataset, sizeof (parentname));
3105         cp = strrchr(parentname, '/');
3106         ASSERT(cp != NULL);
3107         cp[0] = '\0';
3108 
3109         if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3110                 return (error);
3111 
3112         spa_vers = spa_version(spa);
3113         spa_close(spa, FTAG);
3114 
3115         zplver = zfs_zpl_version_map(spa_vers);
3116         fuids_ok = (zplver >= ZPL_VERSION_FUID);
3117         sa_ok = (zplver >= ZPL_VERSION_SA);
3118 
3119         /*
3120          * Open parent object set so we can inherit zplprop values.
3121          */
3122         if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3123                 return (error);
3124 
3125         error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3126             zplprops, is_ci);
3127         dmu_objset_rele(os, FTAG);
3128         return (error);
3129 }
3130 
3131 static int
3132 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3133     nvlist_t *zplprops, boolean_t *is_ci)
3134 {
3135         boolean_t fuids_ok;
3136         boolean_t sa_ok;
3137         uint64_t zplver = ZPL_VERSION;
3138         int error;
3139 
3140         zplver = zfs_zpl_version_map(spa_vers);
3141         fuids_ok = (zplver >= ZPL_VERSION_FUID);
3142         sa_ok = (zplver >= ZPL_VERSION_SA);
3143 
3144         error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3145             createprops, zplprops, is_ci);
3146         return (error);
3147 }
3148 
3149 /*
3150  * innvl: {
3151  *     "type" -> dmu_objset_type_t (int32)
3152  *     (optional) "props" -> { prop -> value }
3153  * }
3154  *
3155  * outnvl: propname -> error code (int32)
3156  */
3157 static int
3158 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3159 {
3160         int error = 0;
3161         zfs_creat_t zct = { 0 };
3162         nvlist_t *nvprops = NULL;
3163         void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3164         int32_t type32;
3165         dmu_objset_type_t type;
3166         boolean_t is_insensitive = B_FALSE;
3167 
3168         if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3169                 return (SET_ERROR(EINVAL));
3170         type = type32;
3171         (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3172 
3173         switch (type) {
3174         case DMU_OST_ZFS:
3175                 cbfunc = zfs_create_cb;
3176                 break;
3177 
3178         case DMU_OST_ZVOL:
3179                 cbfunc = zvol_create_cb;
3180                 break;
3181 
3182         default:
3183                 cbfunc = NULL;
3184                 break;
3185         }
3186         if (strchr(fsname, '@') ||
3187             strchr(fsname, '%'))
3188                 return (SET_ERROR(EINVAL));
3189 
3190         zct.zct_props = nvprops;
3191 
3192         if (cbfunc == NULL)
3193                 return (SET_ERROR(EINVAL));
3194 
3195         if (type == DMU_OST_ZVOL) {
3196                 uint64_t volsize, volblocksize;
3197 
3198                 if (nvprops == NULL)
3199                         return (SET_ERROR(EINVAL));
3200                 if (nvlist_lookup_uint64(nvprops,
3201                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3202                         return (SET_ERROR(EINVAL));
3203 
3204                 if ((error = nvlist_lookup_uint64(nvprops,
3205                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3206                     &volblocksize)) != 0 && error != ENOENT)
3207                         return (SET_ERROR(EINVAL));
3208 
3209                 if (error != 0)
3210                         volblocksize = zfs_prop_default_numeric(
3211                             ZFS_PROP_VOLBLOCKSIZE);
3212 
3213                 if ((error = zvol_check_volblocksize(
3214                     volblocksize)) != 0 ||
3215                     (error = zvol_check_volsize(volsize,
3216                     volblocksize)) != 0)
3217                         return (error);
3218         } else if (type == DMU_OST_ZFS) {
3219                 int error;
3220 
3221                 /*
3222                  * We have to have normalization and
3223                  * case-folding flags correct when we do the
3224                  * file system creation, so go figure them out
3225                  * now.
3226                  */
3227                 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3228                     NV_UNIQUE_NAME, KM_SLEEP) == 0);
3229                 error = zfs_fill_zplprops(fsname, nvprops,
3230                     zct.zct_zplprops, &is_insensitive);
3231                 if (error != 0) {
3232                         nvlist_free(zct.zct_zplprops);
3233                         return (error);
3234                 }
3235         }
3236 
3237         error = dmu_objset_create(fsname, type,
3238             is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3239         nvlist_free(zct.zct_zplprops);
3240 
3241         /*
3242          * It would be nice to do this atomically.
3243          */
3244         if (error == 0) {
3245                 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3246                     nvprops, outnvl);
3247                 if (error != 0)
3248                         (void) dsl_destroy_head(fsname);
3249         }
3250         return (error);
3251 }
3252 
3253 /*
3254  * innvl: {
3255  *     "origin" -> name of origin snapshot
3256  *     (optional) "props" -> { prop -> value }
3257  * }
3258  *
3259  * outnvl: propname -> error code (int32)
3260  */
3261 static int
3262 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3263 {
3264         int error = 0;
3265         nvlist_t *nvprops = NULL;
3266         char *origin_name;
3267 
3268         if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3269                 return (SET_ERROR(EINVAL));
3270         (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3271 
3272         if (strchr(fsname, '@') ||
3273             strchr(fsname, '%'))
3274                 return (SET_ERROR(EINVAL));
3275 
3276         if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3277                 return (SET_ERROR(EINVAL));
3278         error = dmu_objset_clone(fsname, origin_name);
3279         if (error != 0)
3280                 return (error);
3281 
3282         /*
3283          * It would be nice to do this atomically.
3284          */
3285         if (error == 0) {
3286                 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3287                     nvprops, outnvl);
3288                 if (error != 0)
3289                         (void) dsl_destroy_head(fsname);
3290         }
3291         return (error);
3292 }
3293 
3294 /*
3295  * innvl: {
3296  *     "snaps" -> { snapshot1, snapshot2 }
3297  *     (optional) "props" -> { prop -> value (string) }
3298  * }
3299  *
3300  * outnvl: snapshot -> error code (int32)
3301  */
3302 static int
3303 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3304 {
3305         nvlist_t *snaps;
3306         nvlist_t *props = NULL;
3307         int error, poollen;
3308         nvpair_t *pair;
3309 
3310         (void) nvlist_lookup_nvlist(innvl, "props", &props);
3311         if ((error = zfs_check_userprops(poolname, props)) != 0)
3312                 return (error);
3313 
3314         if (!nvlist_empty(props) &&
3315             zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3316                 return (SET_ERROR(ENOTSUP));
3317 
3318         if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3319                 return (SET_ERROR(EINVAL));
3320         poollen = strlen(poolname);
3321         for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3322             pair = nvlist_next_nvpair(snaps, pair)) {
3323                 const char *name = nvpair_name(pair);
3324                 const char *cp = strchr(name, '@');
3325 
3326                 /*
3327                  * The snap name must contain an @, and the part after it must
3328                  * contain only valid characters.
3329                  */
3330                 if (cp == NULL ||
3331                     zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3332                         return (SET_ERROR(EINVAL));
3333 
3334                 /*
3335                  * The snap must be in the specified pool.
3336                  */
3337                 if (strncmp(name, poolname, poollen) != 0 ||
3338                     (name[poollen] != '/' && name[poollen] != '@'))
3339                         return (SET_ERROR(EXDEV));
3340 
3341                 /* This must be the only snap of this fs. */
3342                 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3343                     pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3344                         if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3345                             == 0) {
3346                                 return (SET_ERROR(EXDEV));
3347                         }
3348                 }
3349         }
3350 
3351         error = dsl_dataset_snapshot(snaps, props, outnvl);
3352         return (error);
3353 }
3354 
3355 /*
3356  * innvl: "message" -> string
3357  */
3358 /* ARGSUSED */
3359 static int
3360 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3361 {
3362         char *message;
3363         spa_t *spa;
3364         int error;
3365         char *poolname;
3366 
3367         /*
3368          * The poolname in the ioctl is not set, we get it from the TSD,
3369          * which was set at the end of the last successful ioctl that allows
3370          * logging.  The secpolicy func already checked that it is set.
3371          * Only one log ioctl is allowed after each successful ioctl, so
3372          * we clear the TSD here.
3373          */
3374         poolname = tsd_get(zfs_allow_log_key);
3375         (void) tsd_set(zfs_allow_log_key, NULL);
3376         error = spa_open(poolname, &spa, FTAG);
3377         strfree(poolname);
3378         if (error != 0)
3379                 return (error);
3380 
3381         if (nvlist_lookup_string(innvl, "message", &message) != 0)  {
3382                 spa_close(spa, FTAG);
3383                 return (SET_ERROR(EINVAL));
3384         }
3385 
3386         if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3387                 spa_close(spa, FTAG);
3388                 return (SET_ERROR(ENOTSUP));
3389         }
3390 
3391         error = spa_history_log(spa, message);
3392         spa_close(spa, FTAG);
3393         return (error);
3394 }
3395 
3396 /*
3397  * The dp_config_rwlock must not be held when calling this, because the
3398  * unmount may need to write out data.
3399  *
3400  * This function is best-effort.  Callers must deal gracefully if it
3401  * remains mounted (or is remounted after this call).
3402  *
3403  * Returns 0 if the argument is not a snapshot, or it is not currently a
3404  * filesystem, or we were able to unmount it.  Returns error code otherwise.
3405  */
3406 int
3407 zfs_unmount_snap(const char *snapname)
3408 {
3409         vfs_t *vfsp;
3410         zfsvfs_t *zfsvfs;
3411         int err;
3412 
3413         if (strchr(snapname, '@') == NULL)
3414                 return (0);
3415 
3416         vfsp = zfs_get_vfs(snapname);
3417         if (vfsp == NULL)
3418                 return (0);
3419 
3420         zfsvfs = vfsp->vfs_data;
3421         ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3422 
3423         err = vn_vfswlock(vfsp->vfs_vnodecovered);
3424         VFS_RELE(vfsp);
3425         if (err != 0)
3426                 return (SET_ERROR(err));
3427 
3428         /*
3429          * Always force the unmount for snapshots.
3430          */
3431         (void) dounmount(vfsp, MS_FORCE, kcred);
3432         return (0);
3433 }
3434 
3435 /* ARGSUSED */
3436 static int
3437 zfs_unmount_snap_cb(const char *snapname, void *arg)
3438 {
3439         return (zfs_unmount_snap(snapname));
3440 }
3441 
3442 /*
3443  * When a clone is destroyed, its origin may also need to be destroyed,
3444  * in which case it must be unmounted.  This routine will do that unmount
3445  * if necessary.
3446  */
3447 void
3448 zfs_destroy_unmount_origin(const char *fsname)
3449 {
3450         int error;
3451         objset_t *os;
3452         dsl_dataset_t *ds;
3453 
3454         error = dmu_objset_hold(fsname, FTAG, &os);
3455         if (error != 0)
3456                 return;
3457         ds = dmu_objset_ds(os);
3458         if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3459                 char originname[MAXNAMELEN];
3460                 dsl_dataset_name(ds->ds_prev, originname);
3461                 dmu_objset_rele(os, FTAG);
3462                 (void) zfs_unmount_snap(originname);
3463         } else {
3464                 dmu_objset_rele(os, FTAG);
3465         }
3466 }
3467 
3468 /*
3469  * innvl: {
3470  *     "snaps" -> { snapshot1, snapshot2 }
3471  *     (optional boolean) "defer"
3472  * }
3473  *
3474  * outnvl: snapshot -> error code (int32)
3475  *
3476  */
3477 /* ARGSUSED */
3478 static int
3479 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3480 {
3481         nvlist_t *snaps;
3482         nvpair_t *pair;
3483         boolean_t defer;
3484 
3485         if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3486                 return (SET_ERROR(EINVAL));
3487         defer = nvlist_exists(innvl, "defer");
3488 
3489         for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3490             pair = nvlist_next_nvpair(snaps, pair)) {
3491                 (void) zfs_unmount_snap(nvpair_name(pair));
3492         }
3493 
3494         return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3495 }
3496 
3497 /*
3498  * Create bookmarks.  Bookmark names are of the form <fs>#<bmark>.
3499  * All bookmarks must be in the same pool.
3500  *
3501  * innvl: {
3502  *     bookmark1 -> snapshot1, bookmark2 -> snapshot2
3503  * }
3504  *
3505  * outnvl: bookmark -> error code (int32)
3506  *
3507  */
3508 /* ARGSUSED */
3509 static int
3510 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3511 {
3512         for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3513             pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3514                 char *snap_name;
3515 
3516                 /*
3517                  * Verify the snapshot argument.
3518                  */
3519                 if (nvpair_value_string(pair, &snap_name) != 0)
3520                         return (SET_ERROR(EINVAL));
3521 
3522 
3523                 /* Verify that the keys (bookmarks) are unique */
3524                 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair);
3525                     pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) {
3526                         if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0)
3527                                 return (SET_ERROR(EINVAL));
3528                 }
3529         }
3530 
3531         return (dsl_bookmark_create(innvl, outnvl));
3532 }
3533 
3534 /*
3535  * innvl: {
3536  *     property 1, property 2, ...
3537  * }
3538  *
3539  * outnvl: {
3540  *     bookmark name 1 -> { property 1, property 2, ... },
3541  *     bookmark name 2 -> { property 1, property 2, ... }
3542  * }
3543  *
3544  */
3545 static int
3546 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3547 {
3548         return (dsl_get_bookmarks(fsname, innvl, outnvl));
3549 }
3550 
3551 /*
3552  * innvl: {
3553  *     bookmark name 1, bookmark name 2
3554  * }
3555  *
3556  * outnvl: bookmark -> error code (int32)
3557  *
3558  */
3559 static int
3560 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl,
3561     nvlist_t *outnvl)
3562 {
3563         int error, poollen;
3564 
3565         poollen = strlen(poolname);
3566         for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3567             pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3568                 const char *name = nvpair_name(pair);
3569                 const char *cp = strchr(name, '#');
3570 
3571                 /*
3572                  * The bookmark name must contain an #, and the part after it
3573                  * must contain only valid characters.
3574                  */
3575                 if (cp == NULL ||
3576                     zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3577                         return (SET_ERROR(EINVAL));
3578 
3579                 /*
3580                  * The bookmark must be in the specified pool.
3581                  */
3582                 if (strncmp(name, poolname, poollen) != 0 ||
3583                     (name[poollen] != '/' && name[poollen] != '#'))
3584                         return (SET_ERROR(EXDEV));
3585         }
3586 
3587         error = dsl_bookmark_destroy(innvl, outnvl);
3588         return (error);
3589 }
3590 
3591 /*
3592  * inputs:
3593  * zc_name              name of dataset to destroy
3594  * zc_objset_type       type of objset
3595  * zc_defer_destroy     mark for deferred destroy
3596  *
3597  * outputs:             none
3598  */
3599 static int
3600 zfs_ioc_destroy(zfs_cmd_t *zc)
3601 {
3602         int err;
3603 
3604         if (zc->zc_objset_type == DMU_OST_ZFS) {
3605                 err = zfs_unmount_snap(zc->zc_name);
3606                 if (err != 0)
3607                         return (err);
3608         }
3609 
3610         if (strchr(zc->zc_name, '@'))
3611                 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3612         else
3613                 err = dsl_destroy_head(zc->zc_name);
3614         if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3615                 (void) zvol_remove_minor(zc->zc_name);
3616         return (err);
3617 }
3618 
3619 /*
3620  * fsname is name of dataset to rollback (to most recent snapshot)
3621  *
3622  * innvl is not used.
3623  *
3624  * outnvl: "target" -> name of most recent snapshot
3625  * }
3626  */
3627 /* ARGSUSED */
3628 static int
3629 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
3630 {
3631         zfsvfs_t *zfsvfs;
3632         int error;
3633 
3634         if (getzfsvfs(fsname, &zfsvfs) == 0) {
3635                 error = zfs_suspend_fs(zfsvfs);
3636                 if (error == 0) {
3637                         int resume_err;
3638 
3639                         error = dsl_dataset_rollback(fsname, zfsvfs, outnvl);
3640                         resume_err = zfs_resume_fs(zfsvfs, fsname);
3641                         error = error ? error : resume_err;
3642                 }
3643                 VFS_RELE(zfsvfs->z_vfs);
3644         } else {
3645                 error = dsl_dataset_rollback(fsname, NULL, outnvl);
3646         }
3647         return (error);
3648 }
3649 
3650 static int
3651 recursive_unmount(const char *fsname, void *arg)
3652 {
3653         const char *snapname = arg;
3654         char fullname[MAXNAMELEN];
3655 
3656         (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3657         return (zfs_unmount_snap(fullname));
3658 }
3659 
3660 /*
3661  * inputs:
3662  * zc_name      old name of dataset
3663  * zc_value     new name of dataset
3664  * zc_cookie    recursive flag (only valid for snapshots)
3665  *
3666  * outputs:     none
3667  */
3668 static int
3669 zfs_ioc_rename(zfs_cmd_t *zc)
3670 {
3671         boolean_t recursive = zc->zc_cookie & 1;
3672         char *at;
3673 
3674         zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3675         if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3676             strchr(zc->zc_value, '%'))
3677                 return (SET_ERROR(EINVAL));
3678 
3679         at = strchr(zc->zc_name, '@');
3680         if (at != NULL) {
3681                 /* snaps must be in same fs */
3682                 int error;
3683 
3684                 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3685                         return (SET_ERROR(EXDEV));
3686                 *at = '\0';
3687                 if (zc->zc_objset_type == DMU_OST_ZFS) {
3688                         error = dmu_objset_find(zc->zc_name,
3689                             recursive_unmount, at + 1,
3690                             recursive ? DS_FIND_CHILDREN : 0);
3691                         if (error != 0) {
3692                                 *at = '@';
3693                                 return (error);
3694                         }
3695                 }
3696                 error = dsl_dataset_rename_snapshot(zc->zc_name,
3697                     at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3698                 *at = '@';
3699 
3700                 return (error);
3701         } else {
3702                 if (zc->zc_objset_type == DMU_OST_ZVOL)
3703                         (void) zvol_remove_minor(zc->zc_name);
3704                 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3705         }
3706 }
3707 
3708 static int
3709 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3710 {
3711         const char *propname = nvpair_name(pair);
3712         boolean_t issnap = (strchr(dsname, '@') != NULL);
3713         zfs_prop_t prop = zfs_name_to_prop(propname);
3714         uint64_t intval;
3715         int err;
3716 
3717         if (prop == ZPROP_INVAL) {
3718                 if (zfs_prop_user(propname)) {
3719                         if (err = zfs_secpolicy_write_perms(dsname,
3720                             ZFS_DELEG_PERM_USERPROP, cr))
3721                                 return (err);
3722                         return (0);
3723                 }
3724 
3725                 if (!issnap && zfs_prop_userquota(propname)) {
3726                         const char *perm = NULL;
3727                         const char *uq_prefix =
3728                             zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3729                         const char *gq_prefix =
3730                             zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3731 
3732                         if (strncmp(propname, uq_prefix,
3733                             strlen(uq_prefix)) == 0) {
3734                                 perm = ZFS_DELEG_PERM_USERQUOTA;
3735                         } else if (strncmp(propname, gq_prefix,
3736                             strlen(gq_prefix)) == 0) {
3737                                 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3738                         } else {
3739                                 /* USERUSED and GROUPUSED are read-only */
3740                                 return (SET_ERROR(EINVAL));
3741                         }
3742 
3743                         if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3744                                 return (err);
3745                         return (0);
3746                 }
3747 
3748                 return (SET_ERROR(EINVAL));
3749         }
3750 
3751         if (issnap)
3752                 return (SET_ERROR(EINVAL));
3753 
3754         if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3755                 /*
3756                  * dsl_prop_get_all_impl() returns properties in this
3757                  * format.
3758                  */
3759                 nvlist_t *attrs;
3760                 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3761                 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3762                     &pair) == 0);
3763         }
3764 
3765         /*
3766          * Check that this value is valid for this pool version
3767          */
3768         switch (prop) {
3769         case ZFS_PROP_COMPRESSION:
3770                 /*
3771                  * If the user specified gzip compression, make sure
3772                  * the SPA supports it. We ignore any errors here since
3773                  * we'll catch them later.
3774                  */
3775                 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3776                     nvpair_value_uint64(pair, &intval) == 0) {
3777                         if (intval >= ZIO_COMPRESS_GZIP_1 &&
3778                             intval <= ZIO_COMPRESS_GZIP_9 &&
3779                             zfs_earlier_version(dsname,
3780                             SPA_VERSION_GZIP_COMPRESSION)) {
3781                                 return (SET_ERROR(ENOTSUP));
3782                         }
3783 
3784                         if (intval == ZIO_COMPRESS_ZLE &&
3785                             zfs_earlier_version(dsname,
3786                             SPA_VERSION_ZLE_COMPRESSION))
3787                                 return (SET_ERROR(ENOTSUP));
3788 
3789                         if (intval == ZIO_COMPRESS_LZ4) {
3790                                 spa_t *spa;
3791 
3792                                 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3793                                         return (err);
3794 
3795                                 if (!spa_feature_is_enabled(spa,
3796                                     SPA_FEATURE_LZ4_COMPRESS)) {
3797                                         spa_close(spa, FTAG);
3798                                         return (SET_ERROR(ENOTSUP));
3799                                 }
3800                                 spa_close(spa, FTAG);
3801                         }
3802 
3803                         /*
3804                          * If this is a bootable dataset then
3805                          * verify that the compression algorithm
3806                          * is supported for booting. We must return
3807                          * something other than ENOTSUP since it
3808                          * implies a downrev pool version.
3809                          */
3810                         if (zfs_is_bootfs(dsname) &&
3811                             !BOOTFS_COMPRESS_VALID(intval)) {
3812                                 return (SET_ERROR(ERANGE));
3813                         }
3814                 }
3815                 break;
3816 
3817         case ZFS_PROP_COPIES:
3818                 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3819                         return (SET_ERROR(ENOTSUP));
3820                 break;
3821 
3822         case ZFS_PROP_DEDUP:
3823                 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3824                         return (SET_ERROR(ENOTSUP));
3825                 break;
3826 
3827         case ZFS_PROP_SHARESMB:
3828                 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3829                         return (SET_ERROR(ENOTSUP));
3830                 break;
3831 
3832         case ZFS_PROP_ACLINHERIT:
3833                 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3834                     nvpair_value_uint64(pair, &intval) == 0) {
3835                         if (intval == ZFS_ACL_PASSTHROUGH_X &&
3836                             zfs_earlier_version(dsname,
3837                             SPA_VERSION_PASSTHROUGH_X))
3838                                 return (SET_ERROR(ENOTSUP));
3839                 }
3840                 break;
3841         }
3842 
3843         return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3844 }
3845 
3846 /*
3847  * Checks for a race condition to make sure we don't increment a feature flag
3848  * multiple times.
3849  */
3850 static int
3851 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3852 {
3853         spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3854         spa_feature_t *featurep = arg;
3855 
3856         if (!spa_feature_is_active(spa, *featurep))
3857                 return (0);
3858         else
3859                 return (SET_ERROR(EBUSY));
3860 }
3861 
3862 /*
3863  * The callback invoked on feature activation in the sync task caused by
3864  * zfs_prop_activate_feature.
3865  */
3866 static void
3867 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3868 {
3869         spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3870         spa_feature_t *featurep = arg;
3871 
3872         spa_feature_incr(spa, *featurep, tx);
3873 }
3874 
3875 /*
3876  * Activates a feature on a pool in response to a property setting. This
3877  * creates a new sync task which modifies the pool to reflect the feature
3878  * as being active.
3879  */
3880 static int
3881 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature)
3882 {
3883         int err;
3884 
3885         /* EBUSY here indicates that the feature is already active */
3886         err = dsl_sync_task(spa_name(spa),
3887             zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3888             &feature, 2);
3889 
3890         if (err != 0 && err != EBUSY)
3891                 return (err);
3892         else
3893                 return (0);
3894 }
3895 
3896 /*
3897  * Removes properties from the given props list that fail permission checks
3898  * needed to clear them and to restore them in case of a receive error. For each
3899  * property, make sure we have both set and inherit permissions.
3900  *
3901  * Returns the first error encountered if any permission checks fail. If the
3902  * caller provides a non-NULL errlist, it also gives the complete list of names
3903  * of all the properties that failed a permission check along with the
3904  * corresponding error numbers. The caller is responsible for freeing the
3905  * returned errlist.
3906  *
3907  * If every property checks out successfully, zero is returned and the list
3908  * pointed at by errlist is NULL.
3909  */
3910 static int
3911 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3912 {
3913         zfs_cmd_t *zc;
3914         nvpair_t *pair, *next_pair;
3915         nvlist_t *errors;
3916         int err, rv = 0;
3917 
3918         if (props == NULL)
3919                 return (0);
3920 
3921         VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3922 
3923         zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3924         (void) strcpy(zc->zc_name, dataset);
3925         pair = nvlist_next_nvpair(props, NULL);
3926         while (pair != NULL) {
3927                 next_pair = nvlist_next_nvpair(props, pair);
3928 
3929                 (void) strcpy(zc->zc_value, nvpair_name(pair));
3930                 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3931                     (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3932                         VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3933                         VERIFY(nvlist_add_int32(errors,
3934                             zc->zc_value, err) == 0);
3935                 }
3936                 pair = next_pair;
3937         }
3938         kmem_free(zc, sizeof (zfs_cmd_t));
3939 
3940         if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3941                 nvlist_free(errors);
3942                 errors = NULL;
3943         } else {
3944                 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3945         }
3946 
3947         if (errlist == NULL)
3948                 nvlist_free(errors);
3949         else
3950                 *errlist = errors;
3951 
3952         return (rv);
3953 }
3954 
3955 static boolean_t
3956 propval_equals(nvpair_t *p1, nvpair_t *p2)
3957 {
3958         if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3959                 /* dsl_prop_get_all_impl() format */
3960                 nvlist_t *attrs;
3961                 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3962                 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3963                     &p1) == 0);
3964         }
3965 
3966         if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3967                 nvlist_t *attrs;
3968                 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3969                 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3970                     &p2) == 0);
3971         }
3972 
3973         if (nvpair_type(p1) != nvpair_type(p2))
3974                 return (B_FALSE);
3975 
3976         if (nvpair_type(p1) == DATA_TYPE_STRING) {
3977                 char *valstr1, *valstr2;
3978 
3979                 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3980                 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3981                 return (strcmp(valstr1, valstr2) == 0);
3982         } else {
3983                 uint64_t intval1, intval2;
3984 
3985                 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3986                 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3987                 return (intval1 == intval2);
3988         }
3989 }
3990 
3991 /*
3992  * Remove properties from props if they are not going to change (as determined
3993  * by comparison with origprops). Remove them from origprops as well, since we
3994  * do not need to clear or restore properties that won't change.
3995  */
3996 static void
3997 props_reduce(nvlist_t *props, nvlist_t *origprops)
3998 {
3999         nvpair_t *pair, *next_pair;
4000 
4001         if (origprops == NULL)
4002                 return; /* all props need to be received */
4003 
4004         pair = nvlist_next_nvpair(props, NULL);
4005         while (pair != NULL) {
4006                 const char *propname = nvpair_name(pair);
4007                 nvpair_t *match;
4008 
4009                 next_pair = nvlist_next_nvpair(props, pair);
4010 
4011                 if ((nvlist_lookup_nvpair(origprops, propname,
4012                     &match) != 0) || !propval_equals(pair, match))
4013                         goto next; /* need to set received value */
4014 
4015                 /* don't clear the existing received value */
4016                 (void) nvlist_remove_nvpair(origprops, match);
4017                 /* don't bother receiving the property */
4018                 (void) nvlist_remove_nvpair(props, pair);
4019 next:
4020                 pair = next_pair;
4021         }
4022 }
4023 
4024 #ifdef  DEBUG
4025 static boolean_t zfs_ioc_recv_inject_err;
4026 #endif
4027 
4028 /*
4029  * inputs:
4030  * zc_name              name of containing filesystem
4031  * zc_nvlist_src{_size} nvlist of properties to apply
4032  * zc_value             name of snapshot to create
4033  * zc_string            name of clone origin (if DRR_FLAG_CLONE)
4034  * zc_cookie            file descriptor to recv from
4035  * zc_begin_record      the BEGIN record of the stream (not byteswapped)
4036  * zc_guid              force flag
4037  * zc_cleanup_fd        cleanup-on-exit file descriptor
4038  * zc_action_handle     handle for this guid/ds mapping (or zero on first call)
4039  *
4040  * outputs:
4041  * zc_cookie            number of bytes read
4042  * zc_nvlist_dst{_size} error for each unapplied received property
4043  * zc_obj               zprop_errflags_t
4044  * zc_action_handle     handle for this guid/ds mapping
4045  */
4046 static int
4047 zfs_ioc_recv(zfs_cmd_t *zc)
4048 {
4049         file_t *fp;
4050         dmu_recv_cookie_t drc;
4051         boolean_t force = (boolean_t)zc->zc_guid;
4052         int fd;
4053         int error = 0;
4054         int props_error = 0;
4055         nvlist_t *errors;
4056         offset_t off;
4057         nvlist_t *props = NULL; /* sent properties */
4058         nvlist_t *origprops = NULL; /* existing properties */
4059         char *origin = NULL;
4060         char *tosnap;
4061         char tofs[ZFS_MAXNAMELEN];
4062         boolean_t first_recvd_props = B_FALSE;
4063 
4064         if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
4065             strchr(zc->zc_value, '@') == NULL ||
4066             strchr(zc->zc_value, '%'))
4067                 return (SET_ERROR(EINVAL));
4068 
4069         (void) strcpy(tofs, zc->zc_value);
4070         tosnap = strchr(tofs, '@');
4071         *tosnap++ = '\0';
4072 
4073         if (zc->zc_nvlist_src != NULL &&
4074             (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
4075             zc->zc_iflags, &props)) != 0)
4076                 return (error);
4077 
4078         fd = zc->zc_cookie;
4079         fp = getf(fd);
4080         if (fp == NULL) {
4081                 nvlist_free(props);
4082                 return (SET_ERROR(EBADF));
4083         }
4084 
4085         VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4086 
4087         if (zc->zc_string[0])
4088                 origin = zc->zc_string;
4089 
4090         error = dmu_recv_begin(tofs, tosnap,
4091             &zc->zc_begin_record, force, origin, &drc);
4092         if (error != 0)
4093                 goto out;
4094 
4095         /*
4096          * Set properties before we receive the stream so that they are applied
4097          * to the new data. Note that we must call dmu_recv_stream() if
4098          * dmu_recv_begin() succeeds.
4099          */
4100         if (props != NULL && !drc.drc_newfs) {
4101                 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
4102                     SPA_VERSION_RECVD_PROPS &&
4103                     !dsl_prop_get_hasrecvd(tofs))
4104                         first_recvd_props = B_TRUE;
4105 
4106                 /*
4107                  * If new received properties are supplied, they are to
4108                  * completely replace the existing received properties, so stash
4109                  * away the existing ones.
4110                  */
4111                 if (dsl_prop_get_received(tofs, &origprops) == 0) {
4112                         nvlist_t *errlist = NULL;
4113                         /*
4114                          * Don't bother writing a property if its value won't
4115                          * change (and avoid the unnecessary security checks).
4116                          *
4117                          * The first receive after SPA_VERSION_RECVD_PROPS is a
4118                          * special case where we blow away all local properties
4119                          * regardless.
4120                          */
4121                         if (!first_recvd_props)
4122                                 props_reduce(props, origprops);
4123                         if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
4124                                 (void) nvlist_merge(errors, errlist, 0);
4125                         nvlist_free(errlist);
4126 
4127                         if (clear_received_props(tofs, origprops,
4128                             first_recvd_props ? NULL : props) != 0)
4129                                 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4130                 } else {
4131                         zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4132                 }
4133         }
4134 
4135         if (props != NULL) {
4136                 props_error = dsl_prop_set_hasrecvd(tofs);
4137 
4138                 if (props_error == 0) {
4139                         (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4140                             props, errors);
4141                 }
4142         }
4143 
4144         if (zc->zc_nvlist_dst_size != 0 &&
4145             (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4146             put_nvlist(zc, errors) != 0)) {
4147                 /*
4148                  * Caller made zc->zc_nvlist_dst less than the minimum expected
4149                  * size or supplied an invalid address.
4150                  */
4151                 props_error = SET_ERROR(EINVAL);
4152         }
4153 
4154         off = fp->f_offset;
4155         error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4156             &zc->zc_action_handle);
4157 
4158         if (error == 0) {
4159                 zfsvfs_t *zfsvfs = NULL;
4160 
4161                 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4162                         /* online recv */
4163                         int end_err;
4164 
4165                         error = zfs_suspend_fs(zfsvfs);
4166                         /*
4167                          * If the suspend fails, then the recv_end will
4168                          * likely also fail, and clean up after itself.
4169                          */
4170                         end_err = dmu_recv_end(&drc, zfsvfs);
4171                         if (error == 0)
4172                                 error = zfs_resume_fs(zfsvfs, tofs);
4173                         error = error ? error : end_err;
4174                         VFS_RELE(zfsvfs->z_vfs);
4175                 } else {
4176                         error = dmu_recv_end(&drc, NULL);
4177                 }
4178         }
4179 
4180         zc->zc_cookie = off - fp->f_offset;
4181         if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4182                 fp->f_offset = off;
4183 
4184 #ifdef  DEBUG
4185         if (zfs_ioc_recv_inject_err) {
4186                 zfs_ioc_recv_inject_err = B_FALSE;
4187                 error = 1;
4188         }
4189 #endif
4190         /*
4191          * On error, restore the original props.
4192          */
4193         if (error != 0 && props != NULL && !drc.drc_newfs) {
4194                 if (clear_received_props(tofs, props, NULL) != 0) {
4195                         /*
4196                          * We failed to clear the received properties.
4197                          * Since we may have left a $recvd value on the
4198                          * system, we can't clear the $hasrecvd flag.
4199                          */
4200                         zc->zc_obj |= ZPROP_ERR_NORESTORE;
4201                 } else if (first_recvd_props) {
4202                         dsl_prop_unset_hasrecvd(tofs);
4203                 }
4204 
4205                 if (origprops == NULL && !drc.drc_newfs) {
4206                         /* We failed to stash the original properties. */
4207                         zc->zc_obj |= ZPROP_ERR_NORESTORE;
4208                 }
4209 
4210                 /*
4211                  * dsl_props_set() will not convert RECEIVED to LOCAL on or
4212                  * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4213                  * explictly if we're restoring local properties cleared in the
4214                  * first new-style receive.
4215                  */
4216                 if (origprops != NULL &&
4217                     zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4218                     ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4219                     origprops, NULL) != 0) {
4220                         /*
4221                          * We stashed the original properties but failed to
4222                          * restore them.
4223                          */
4224                         zc->zc_obj |= ZPROP_ERR_NORESTORE;
4225                 }
4226         }
4227 out:
4228         nvlist_free(props);
4229         nvlist_free(origprops);
4230         nvlist_free(errors);
4231         releasef(fd);
4232 
4233         if (error == 0)
4234                 error = props_error;
4235 
4236         return (error);
4237 }
4238 
4239 /*
4240  * inputs:
4241  * zc_name      name of snapshot to send
4242  * zc_cookie    file descriptor to send stream to
4243  * zc_obj       fromorigin flag (mutually exclusive with zc_fromobj)
4244  * zc_sendobj   objsetid of snapshot to send
4245  * zc_fromobj   objsetid of incremental fromsnap (may be zero)
4246  * zc_guid      if set, estimate size of stream only.  zc_cookie is ignored.
4247  *              output size in zc_objset_type.
4248  *
4249  * outputs:
4250  * zc_objset_type       estimated size, if zc_guid is set
4251  */
4252 static int
4253 zfs_ioc_send(zfs_cmd_t *zc)
4254 {
4255         int error;
4256         offset_t off;
4257         boolean_t estimate = (zc->zc_guid != 0);
4258 
4259         if (zc->zc_obj != 0) {
4260                 dsl_pool_t *dp;
4261                 dsl_dataset_t *tosnap;
4262 
4263                 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4264                 if (error != 0)
4265                         return (error);
4266 
4267                 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4268                 if (error != 0) {
4269                         dsl_pool_rele(dp, FTAG);
4270                         return (error);
4271                 }
4272 
4273                 if (dsl_dir_is_clone(tosnap->ds_dir))
4274                         zc->zc_fromobj = tosnap->ds_dir->dd_phys->dd_origin_obj;
4275                 dsl_dataset_rele(tosnap, FTAG);
4276                 dsl_pool_rele(dp, FTAG);
4277         }
4278 
4279         if (estimate) {
4280                 dsl_pool_t *dp;
4281                 dsl_dataset_t *tosnap;
4282                 dsl_dataset_t *fromsnap = NULL;
4283 
4284                 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4285                 if (error != 0)
4286                         return (error);
4287 
4288                 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4289                 if (error != 0) {
4290                         dsl_pool_rele(dp, FTAG);
4291                         return (error);
4292                 }
4293 
4294                 if (zc->zc_fromobj != 0) {
4295                         error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4296                             FTAG, &fromsnap);
4297                         if (error != 0) {
4298                                 dsl_dataset_rele(tosnap, FTAG);
4299                                 dsl_pool_rele(dp, FTAG);
4300                                 return (error);
4301                         }
4302                 }
4303 
4304                 error = dmu_send_estimate(tosnap, fromsnap,
4305                     &zc->zc_objset_type);
4306 
4307                 if (fromsnap != NULL)
4308                         dsl_dataset_rele(fromsnap, FTAG);
4309                 dsl_dataset_rele(tosnap, FTAG);
4310                 dsl_pool_rele(dp, FTAG);
4311         } else {
4312                 file_t *fp = getf(zc->zc_cookie);
4313                 if (fp == NULL)
4314                         return (SET_ERROR(EBADF));
4315 
4316                 off = fp->f_offset;
4317                 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4318                     zc->zc_fromobj, zc->zc_cookie, fp->f_vnode, &off);
4319 
4320                 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4321                         fp->f_offset = off;
4322                 releasef(zc->zc_cookie);
4323         }
4324         return (error);
4325 }
4326 
4327 /*
4328  * inputs:
4329  * zc_name      name of snapshot on which to report progress
4330  * zc_cookie    file descriptor of send stream
4331  *
4332  * outputs:
4333  * zc_cookie    number of bytes written in send stream thus far
4334  */
4335 static int
4336 zfs_ioc_send_progress(zfs_cmd_t *zc)
4337 {
4338         dsl_pool_t *dp;
4339         dsl_dataset_t *ds;
4340         dmu_sendarg_t *dsp = NULL;
4341         int error;
4342 
4343         error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4344         if (error != 0)
4345                 return (error);
4346 
4347         error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4348         if (error != 0) {
4349                 dsl_pool_rele(dp, FTAG);
4350                 return (error);
4351         }
4352 
4353         mutex_enter(&ds->ds_sendstream_lock);
4354 
4355         /*
4356          * Iterate over all the send streams currently active on this dataset.
4357          * If there's one which matches the specified file descriptor _and_ the
4358          * stream was started by the current process, return the progress of
4359          * that stream.
4360          */
4361         for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4362             dsp = list_next(&ds->ds_sendstreams, dsp)) {
4363                 if (dsp->dsa_outfd == zc->zc_cookie &&
4364                     dsp->dsa_proc == curproc)
4365                         break;
4366         }
4367 
4368         if (dsp != NULL)
4369                 zc->zc_cookie = *(dsp->dsa_off);
4370         else
4371                 error = SET_ERROR(ENOENT);
4372 
4373         mutex_exit(&ds->ds_sendstream_lock);
4374         dsl_dataset_rele(ds, FTAG);
4375         dsl_pool_rele(dp, FTAG);
4376         return (error);
4377 }
4378 
4379 static int
4380 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4381 {
4382         int id, error;
4383 
4384         error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4385             &zc->zc_inject_record);
4386 
4387         if (error == 0)
4388                 zc->zc_guid = (uint64_t)id;
4389 
4390         return (error);
4391 }
4392 
4393 static int
4394 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4395 {
4396         return (zio_clear_fault((int)zc->zc_guid));
4397 }
4398 
4399 static int
4400 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4401 {
4402         int id = (int)zc->zc_guid;
4403         int error;
4404 
4405         error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4406             &zc->zc_inject_record);
4407 
4408         zc->zc_guid = id;
4409 
4410         return (error);
4411 }
4412 
4413 static int
4414 zfs_ioc_error_log(zfs_cmd_t *zc)
4415 {
4416         spa_t *spa;
4417         int error;
4418         size_t count = (size_t)zc->zc_nvlist_dst_size;
4419 
4420         if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4421                 return (error);
4422 
4423         error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4424             &count);
4425         if (error == 0)
4426                 zc->zc_nvlist_dst_size = count;
4427         else
4428                 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4429 
4430         spa_close(spa, FTAG);
4431 
4432         return (error);
4433 }
4434 
4435 static int
4436 zfs_ioc_clear(zfs_cmd_t *zc)
4437 {
4438         spa_t *spa;
4439         vdev_t *vd;
4440         int error;
4441 
4442         /*
4443          * On zpool clear we also fix up missing slogs
4444          */
4445         mutex_enter(&spa_namespace_lock);
4446         spa = spa_lookup(zc->zc_name);
4447         if (spa == NULL) {
4448                 mutex_exit(&spa_namespace_lock);
4449                 return (SET_ERROR(EIO));
4450         }
4451         if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4452                 /* we need to let spa_open/spa_load clear the chains */
4453                 spa_set_log_state(spa, SPA_LOG_CLEAR);
4454         }
4455         spa->spa_last_open_failed = 0;
4456         mutex_exit(&spa_namespace_lock);
4457 
4458         if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4459                 error = spa_open(zc->zc_name, &spa, FTAG);
4460         } else {
4461                 nvlist_t *policy;
4462                 nvlist_t *config = NULL;
4463 
4464                 if (zc->zc_nvlist_src == NULL)
4465                         return (SET_ERROR(EINVAL));
4466 
4467                 if ((error = get_nvlist(zc->zc_nvlist_src,
4468                     zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4469                         error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4470                             policy, &config);
4471                         if (config != NULL) {
4472                                 int err;
4473 
4474                                 if ((err = put_nvlist(zc, config)) != 0)
4475                                         error = err;
4476                                 nvlist_free(config);
4477                         }
4478                         nvlist_free(policy);
4479                 }
4480         }
4481 
4482         if (error != 0)
4483                 return (error);
4484 
4485         spa_vdev_state_enter(spa, SCL_NONE);
4486 
4487         if (zc->zc_guid == 0) {
4488                 vd = NULL;
4489         } else {
4490                 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4491                 if (vd == NULL) {
4492                         (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4493                         spa_close(spa, FTAG);
4494                         return (SET_ERROR(ENODEV));
4495                 }
4496         }
4497 
4498         vdev_clear(spa, vd);
4499 
4500         (void) spa_vdev_state_exit(spa, NULL, 0);
4501 
4502         /*
4503          * Resume any suspended I/Os.
4504          */
4505         if (zio_resume(spa) != 0)
4506                 error = SET_ERROR(EIO);
4507 
4508         spa_close(spa, FTAG);
4509 
4510         return (error);
4511 }
4512 
4513 static int
4514 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4515 {
4516         spa_t *spa;
4517         int error;
4518 
4519         error = spa_open(zc->zc_name, &spa, FTAG);
4520         if (error != 0)
4521                 return (error);
4522 
4523         spa_vdev_state_enter(spa, SCL_NONE);
4524 
4525         /*
4526          * If a resilver is already in progress then set the
4527          * spa_scrub_reopen flag to B_TRUE so that we don't restart
4528          * the scan as a side effect of the reopen. Otherwise, let
4529          * vdev_open() decided if a resilver is required.
4530          */
4531         spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4532         vdev_reopen(spa->spa_root_vdev);
4533         spa->spa_scrub_reopen = B_FALSE;
4534 
4535         (void) spa_vdev_state_exit(spa, NULL, 0);
4536         spa_close(spa, FTAG);
4537         return (0);
4538 }
4539 /*
4540  * inputs:
4541  * zc_name      name of filesystem
4542  * zc_value     name of origin snapshot
4543  *
4544  * outputs:
4545  * zc_string    name of conflicting snapshot, if there is one
4546  */
4547 static int
4548 zfs_ioc_promote(zfs_cmd_t *zc)
4549 {
4550         char *cp;
4551 
4552         /*
4553          * We don't need to unmount *all* the origin fs's snapshots, but
4554          * it's easier.
4555          */
4556         cp = strchr(zc->zc_value, '@');
4557         if (cp)
4558                 *cp = '\0';
4559         (void) dmu_objset_find(zc->zc_value,
4560             zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4561         return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4562 }
4563 
4564 /*
4565  * Retrieve a single {user|group}{used|quota}@... property.
4566  *
4567  * inputs:
4568  * zc_name      name of filesystem
4569  * zc_objset_type zfs_userquota_prop_t
4570  * zc_value     domain name (eg. "S-1-234-567-89")
4571  * zc_guid      RID/UID/GID
4572  *
4573  * outputs:
4574  * zc_cookie    property value
4575  */
4576 static int
4577 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4578 {
4579         zfsvfs_t *zfsvfs;
4580         int error;
4581 
4582         if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4583                 return (SET_ERROR(EINVAL));
4584 
4585         error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4586         if (error != 0)
4587                 return (error);
4588 
4589         error = zfs_userspace_one(zfsvfs,
4590             zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4591         zfsvfs_rele(zfsvfs, FTAG);
4592 
4593         return (error);
4594 }
4595 
4596 /*
4597  * inputs:
4598  * zc_name              name of filesystem
4599  * zc_cookie            zap cursor
4600  * zc_objset_type       zfs_userquota_prop_t
4601  * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4602  *
4603  * outputs:
4604  * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4605  * zc_cookie    zap cursor
4606  */
4607 static int
4608 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4609 {
4610         zfsvfs_t *zfsvfs;
4611         int bufsize = zc->zc_nvlist_dst_size;
4612 
4613         if (bufsize <= 0)
4614                 return (SET_ERROR(ENOMEM));
4615 
4616         int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4617         if (error != 0)
4618                 return (error);
4619 
4620         void *buf = kmem_alloc(bufsize, KM_SLEEP);
4621 
4622         error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4623             buf, &zc->zc_nvlist_dst_size);
4624 
4625         if (error == 0) {
4626                 error = xcopyout(buf,
4627                     (void *)(uintptr_t)zc->zc_nvlist_dst,
4628                     zc->zc_nvlist_dst_size);
4629         }
4630         kmem_free(buf, bufsize);
4631         zfsvfs_rele(zfsvfs, FTAG);
4632 
4633         return (error);
4634 }
4635 
4636 /*
4637  * inputs:
4638  * zc_name              name of filesystem
4639  *
4640  * outputs:
4641  * none
4642  */
4643 static int
4644 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4645 {
4646         objset_t *os;
4647         int error = 0;
4648         zfsvfs_t *zfsvfs;
4649 
4650         if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4651                 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4652                         /*
4653                          * If userused is not enabled, it may be because the
4654                          * objset needs to be closed & reopened (to grow the
4655                          * objset_phys_t).  Suspend/resume the fs will do that.
4656                          */
4657                         error = zfs_suspend_fs(zfsvfs);
4658                         if (error == 0) {
4659                                 dmu_objset_refresh_ownership(zfsvfs->z_os,
4660                                     zfsvfs);
4661                                 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4662                         }
4663                 }
4664                 if (error == 0)
4665                         error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4666                 VFS_RELE(zfsvfs->z_vfs);
4667         } else {
4668                 /* XXX kind of reading contents without owning */
4669                 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4670                 if (error != 0)
4671                         return (error);
4672 
4673                 error = dmu_objset_userspace_upgrade(os);
4674                 dmu_objset_rele(os, FTAG);
4675         }
4676 
4677         return (error);
4678 }
4679 
4680 /*
4681  * We don't want to have a hard dependency
4682  * against some special symbols in sharefs
4683  * nfs, and smbsrv.  Determine them if needed when
4684  * the first file system is shared.
4685  * Neither sharefs, nfs or smbsrv are unloadable modules.
4686  */
4687 int (*znfsexport_fs)(void *arg);
4688 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4689 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4690 
4691 int zfs_nfsshare_inited;
4692 int zfs_smbshare_inited;
4693 
4694 ddi_modhandle_t nfs_mod;
4695 ddi_modhandle_t sharefs_mod;
4696 ddi_modhandle_t smbsrv_mod;
4697 kmutex_t zfs_share_lock;
4698 
4699 static int
4700 zfs_init_sharefs()
4701 {
4702         int error;
4703 
4704         ASSERT(MUTEX_HELD(&zfs_share_lock));
4705         /* Both NFS and SMB shares also require sharetab support. */
4706         if (sharefs_mod == NULL && ((sharefs_mod =
4707             ddi_modopen("fs/sharefs",
4708             KRTLD_MODE_FIRST, &error)) == NULL)) {
4709                 return (SET_ERROR(ENOSYS));
4710         }
4711         if (zshare_fs == NULL && ((zshare_fs =
4712             (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4713             ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4714                 return (SET_ERROR(ENOSYS));
4715         }
4716         return (0);
4717 }
4718 
4719 static int
4720 zfs_ioc_share(zfs_cmd_t *zc)
4721 {
4722         int error;
4723         int opcode;
4724 
4725         switch (zc->zc_share.z_sharetype) {
4726         case ZFS_SHARE_NFS:
4727         case ZFS_UNSHARE_NFS:
4728                 if (zfs_nfsshare_inited == 0) {
4729                         mutex_enter(&zfs_share_lock);
4730                         if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4731                             KRTLD_MODE_FIRST, &error)) == NULL)) {
4732                                 mutex_exit(&zfs_share_lock);
4733                                 return (SET_ERROR(ENOSYS));
4734                         }
4735                         if (znfsexport_fs == NULL &&
4736                             ((znfsexport_fs = (int (*)(void *))
4737                             ddi_modsym(nfs_mod,
4738                             "nfs_export", &error)) == NULL)) {
4739                                 mutex_exit(&zfs_share_lock);
4740                                 return (SET_ERROR(ENOSYS));
4741                         }
4742                         error = zfs_init_sharefs();
4743                         if (error != 0) {
4744                                 mutex_exit(&zfs_share_lock);
4745                                 return (SET_ERROR(ENOSYS));
4746                         }
4747                         zfs_nfsshare_inited = 1;
4748                         mutex_exit(&zfs_share_lock);
4749                 }
4750                 break;
4751         case ZFS_SHARE_SMB:
4752         case ZFS_UNSHARE_SMB:
4753                 if (zfs_smbshare_inited == 0) {
4754                         mutex_enter(&zfs_share_lock);
4755                         if (smbsrv_mod == NULL && ((smbsrv_mod =
4756                             ddi_modopen("drv/smbsrv",
4757                             KRTLD_MODE_FIRST, &error)) == NULL)) {
4758                                 mutex_exit(&zfs_share_lock);
4759                                 return (SET_ERROR(ENOSYS));
4760                         }
4761                         if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4762                             (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4763                             "smb_server_share", &error)) == NULL)) {
4764                                 mutex_exit(&zfs_share_lock);
4765                                 return (SET_ERROR(ENOSYS));
4766                         }
4767                         error = zfs_init_sharefs();
4768                         if (error != 0) {
4769                                 mutex_exit(&zfs_share_lock);
4770                                 return (SET_ERROR(ENOSYS));
4771                         }
4772                         zfs_smbshare_inited = 1;
4773                         mutex_exit(&zfs_share_lock);
4774                 }
4775                 break;
4776         default:
4777                 return (SET_ERROR(EINVAL));
4778         }
4779 
4780         switch (zc->zc_share.z_sharetype) {
4781         case ZFS_SHARE_NFS:
4782         case ZFS_UNSHARE_NFS:
4783                 if (error =
4784                     znfsexport_fs((void *)
4785                     (uintptr_t)zc->zc_share.z_exportdata))
4786                         return (error);
4787                 break;
4788         case ZFS_SHARE_SMB:
4789         case ZFS_UNSHARE_SMB:
4790                 if (error = zsmbexport_fs((void *)
4791                     (uintptr_t)zc->zc_share.z_exportdata,
4792                     zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4793                     B_TRUE: B_FALSE)) {
4794                         return (error);
4795                 }
4796                 break;
4797         }
4798 
4799         opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4800             zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4801             SHAREFS_ADD : SHAREFS_REMOVE;
4802 
4803         /*
4804          * Add or remove share from sharetab
4805          */
4806         error = zshare_fs(opcode,
4807             (void *)(uintptr_t)zc->zc_share.z_sharedata,
4808             zc->zc_share.z_sharemax);
4809 
4810         return (error);
4811 
4812 }
4813 
4814 ace_t full_access[] = {
4815         {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4816 };
4817 
4818 /*
4819  * inputs:
4820  * zc_name              name of containing filesystem
4821  * zc_obj               object # beyond which we want next in-use object #
4822  *
4823  * outputs:
4824  * zc_obj               next in-use object #
4825  */
4826 static int
4827 zfs_ioc_next_obj(zfs_cmd_t *zc)
4828 {
4829         objset_t *os = NULL;
4830         int error;
4831 
4832         error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4833         if (error != 0)
4834                 return (error);
4835 
4836         error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4837             os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4838 
4839         dmu_objset_rele(os, FTAG);
4840         return (error);
4841 }
4842 
4843 /*
4844  * inputs:
4845  * zc_name              name of filesystem
4846  * zc_value             prefix name for snapshot
4847  * zc_cleanup_fd        cleanup-on-exit file descriptor for calling process
4848  *
4849  * outputs:
4850  * zc_value             short name of new snapshot
4851  */
4852 static int
4853 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4854 {
4855         char *snap_name;
4856         char *hold_name;
4857         int error;
4858         minor_t minor;
4859 
4860         error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4861         if (error != 0)
4862                 return (error);
4863 
4864         snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
4865             (u_longlong_t)ddi_get_lbolt64());
4866         hold_name = kmem_asprintf("%%%s", zc->zc_value);
4867 
4868         error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
4869             hold_name);
4870         if (error == 0)
4871                 (void) strcpy(zc->zc_value, snap_name);
4872         strfree(snap_name);
4873         strfree(hold_name);
4874         zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4875         return (error);
4876 }
4877 
4878 /*
4879  * inputs:
4880  * zc_name              name of "to" snapshot
4881  * zc_value             name of "from" snapshot
4882  * zc_cookie            file descriptor to write diff data on
4883  *
4884  * outputs:
4885  * dmu_diff_record_t's to the file descriptor
4886  */
4887 static int
4888 zfs_ioc_diff(zfs_cmd_t *zc)
4889 {
4890         file_t *fp;
4891         offset_t off;
4892         int error;
4893 
4894         fp = getf(zc->zc_cookie);
4895         if (fp == NULL)
4896                 return (SET_ERROR(EBADF));
4897 
4898         off = fp->f_offset;
4899 
4900         error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
4901 
4902         if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4903                 fp->f_offset = off;
4904         releasef(zc->zc_cookie);
4905 
4906         return (error);
4907 }
4908 
4909 /*
4910  * Remove all ACL files in shares dir
4911  */
4912 static int
4913 zfs_smb_acl_purge(znode_t *dzp)
4914 {
4915         zap_cursor_t    zc;
4916         zap_attribute_t zap;
4917         zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4918         int error;
4919 
4920         for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4921             (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4922             zap_cursor_advance(&zc)) {
4923                 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4924                     NULL, 0)) != 0)
4925                         break;
4926         }
4927         zap_cursor_fini(&zc);
4928         return (error);
4929 }
4930 
4931 static int
4932 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4933 {
4934         vnode_t *vp;
4935         znode_t *dzp;
4936         vnode_t *resourcevp = NULL;
4937         znode_t *sharedir;
4938         zfsvfs_t *zfsvfs;
4939         nvlist_t *nvlist;
4940         char *src, *target;
4941         vattr_t vattr;
4942         vsecattr_t vsec;
4943         int error = 0;
4944 
4945         if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4946             NO_FOLLOW, NULL, &vp)) != 0)
4947                 return (error);
4948 
4949         /* Now make sure mntpnt and dataset are ZFS */
4950 
4951         if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4952             (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4953             zc->zc_name) != 0)) {
4954                 VN_RELE(vp);
4955                 return (SET_ERROR(EINVAL));
4956         }
4957 
4958         dzp = VTOZ(vp);
4959         zfsvfs = dzp->z_zfsvfs;
4960         ZFS_ENTER(zfsvfs);
4961 
4962         /*
4963          * Create share dir if its missing.
4964          */
4965         mutex_enter(&zfsvfs->z_lock);
4966         if (zfsvfs->z_shares_dir == 0) {
4967                 dmu_tx_t *tx;
4968 
4969                 tx = dmu_tx_create(zfsvfs->z_os);
4970                 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4971                     ZFS_SHARES_DIR);
4972                 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4973                 error = dmu_tx_assign(tx, TXG_WAIT);
4974                 if (error != 0) {
4975                         dmu_tx_abort(tx);
4976                 } else {
4977                         error = zfs_create_share_dir(zfsvfs, tx);
4978                         dmu_tx_commit(tx);
4979                 }
4980                 if (error != 0) {
4981                         mutex_exit(&zfsvfs->z_lock);
4982                         VN_RELE(vp);
4983                         ZFS_EXIT(zfsvfs);
4984                         return (error);
4985                 }
4986         }
4987         mutex_exit(&zfsvfs->z_lock);
4988 
4989         ASSERT(zfsvfs->z_shares_dir);
4990         if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4991                 VN_RELE(vp);
4992                 ZFS_EXIT(zfsvfs);
4993                 return (error);
4994         }
4995 
4996         switch (zc->zc_cookie) {
4997         case ZFS_SMB_ACL_ADD:
4998                 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4999                 vattr.va_type = VREG;
5000                 vattr.va_mode = S_IFREG|0777;
5001                 vattr.va_uid = 0;
5002                 vattr.va_gid = 0;
5003 
5004                 vsec.vsa_mask = VSA_ACE;
5005                 vsec.vsa_aclentp = &full_access;
5006                 vsec.vsa_aclentsz = sizeof (full_access);
5007                 vsec.vsa_aclcnt = 1;
5008 
5009                 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
5010                     &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
5011                 if (resourcevp)
5012                         VN_RELE(resourcevp);
5013                 break;
5014 
5015         case ZFS_SMB_ACL_REMOVE:
5016                 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
5017                     NULL, 0);
5018                 break;
5019 
5020         case ZFS_SMB_ACL_RENAME:
5021                 if ((error = get_nvlist(zc->zc_nvlist_src,
5022                     zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
5023                         VN_RELE(vp);
5024                         ZFS_EXIT(zfsvfs);
5025                         return (error);
5026                 }
5027                 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
5028                     nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
5029                     &target)) {
5030                         VN_RELE(vp);
5031                         VN_RELE(ZTOV(sharedir));
5032                         ZFS_EXIT(zfsvfs);
5033                         nvlist_free(nvlist);
5034                         return (error);
5035                 }
5036                 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
5037                     kcred, NULL, 0);
5038                 nvlist_free(nvlist);
5039                 break;
5040 
5041         case ZFS_SMB_ACL_PURGE:
5042                 error = zfs_smb_acl_purge(sharedir);
5043                 break;
5044 
5045         default:
5046                 error = SET_ERROR(EINVAL);
5047                 break;
5048         }
5049 
5050         VN_RELE(vp);
5051         VN_RELE(ZTOV(sharedir));
5052 
5053         ZFS_EXIT(zfsvfs);
5054 
5055         return (error);
5056 }
5057 
5058 /*
5059  * innvl: {
5060  *     "holds" -> { snapname -> holdname (string), ... }
5061  *     (optional) "cleanup_fd" -> fd (int32)
5062  * }
5063  *
5064  * outnvl: {
5065  *     snapname -> error value (int32)
5066  *     ...
5067  * }
5068  */
5069 /* ARGSUSED */
5070 static int
5071 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
5072 {
5073         nvlist_t *holds;
5074         int cleanup_fd = -1;
5075         int error;
5076         minor_t minor = 0;
5077 
5078         error = nvlist_lookup_nvlist(args, "holds", &holds);
5079         if (error != 0)
5080                 return (SET_ERROR(EINVAL));
5081 
5082         if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
5083                 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
5084                 if (error != 0)
5085                         return (error);
5086         }
5087 
5088         error = dsl_dataset_user_hold(holds, minor, errlist);
5089         if (minor != 0)
5090                 zfs_onexit_fd_rele(cleanup_fd);
5091         return (error);
5092 }
5093 
5094 /*
5095  * innvl is not used.
5096  *
5097  * outnvl: {
5098  *    holdname -> time added (uint64 seconds since epoch)
5099  *    ...
5100  * }
5101  */
5102 /* ARGSUSED */
5103 static int
5104 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
5105 {
5106         return (dsl_dataset_get_holds(snapname, outnvl));
5107 }
5108 
5109 /*
5110  * innvl: {
5111  *     snapname -> { holdname, ... }
5112  *     ...
5113  * }
5114  *
5115  * outnvl: {
5116  *     snapname -> error value (int32)
5117  *     ...
5118  * }
5119  */
5120 /* ARGSUSED */
5121 static int
5122 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
5123 {
5124         return (dsl_dataset_user_release(holds, errlist));
5125 }
5126 
5127 /*
5128  * inputs:
5129  * zc_name              name of new filesystem or snapshot
5130  * zc_value             full name of old snapshot
5131  *
5132  * outputs:
5133  * zc_cookie            space in bytes
5134  * zc_objset_type       compressed space in bytes
5135  * zc_perm_action       uncompressed space in bytes
5136  */
5137 static int
5138 zfs_ioc_space_written(zfs_cmd_t *zc)
5139 {
5140         int error;
5141         dsl_pool_t *dp;
5142         dsl_dataset_t *new, *old;
5143 
5144         error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5145         if (error != 0)
5146                 return (error);
5147         error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5148         if (error != 0) {
5149                 dsl_pool_rele(dp, FTAG);
5150                 return (error);
5151         }
5152         error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5153         if (error != 0) {
5154                 dsl_dataset_rele(new, FTAG);
5155                 dsl_pool_rele(dp, FTAG);
5156                 return (error);
5157         }
5158 
5159         error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5160             &zc->zc_objset_type, &zc->zc_perm_action);
5161         dsl_dataset_rele(old, FTAG);
5162         dsl_dataset_rele(new, FTAG);
5163         dsl_pool_rele(dp, FTAG);
5164         return (error);
5165 }
5166 
5167 /*
5168  * innvl: {
5169  *     "firstsnap" -> snapshot name
5170  * }
5171  *
5172  * outnvl: {
5173  *     "used" -> space in bytes
5174  *     "compressed" -> compressed space in bytes
5175  *     "uncompressed" -> uncompressed space in bytes
5176  * }
5177  */
5178 static int
5179 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5180 {
5181         int error;
5182         dsl_pool_t *dp;
5183         dsl_dataset_t *new, *old;
5184         char *firstsnap;
5185         uint64_t used, comp, uncomp;
5186 
5187         if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5188                 return (SET_ERROR(EINVAL));
5189 
5190         error = dsl_pool_hold(lastsnap, FTAG, &dp);
5191         if (error != 0)
5192                 return (error);
5193 
5194         error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5195         if (error != 0) {
5196                 dsl_pool_rele(dp, FTAG);
5197                 return (error);
5198         }
5199         error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5200         if (error != 0) {
5201                 dsl_dataset_rele(new, FTAG);
5202                 dsl_pool_rele(dp, FTAG);
5203                 return (error);
5204         }
5205 
5206         error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5207         dsl_dataset_rele(old, FTAG);
5208         dsl_dataset_rele(new, FTAG);
5209         dsl_pool_rele(dp, FTAG);
5210         fnvlist_add_uint64(outnvl, "used", used);
5211         fnvlist_add_uint64(outnvl, "compressed", comp);
5212         fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5213         return (error);
5214 }
5215 
5216 /*
5217  * innvl: {
5218  *     "fd" -> file descriptor to write stream to (int32)
5219  *     (optional) "fromsnap" -> full snap name to send an incremental from
5220  * }
5221  *
5222  * outnvl is unused
5223  */
5224 /* ARGSUSED */
5225 static int
5226 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5227 {
5228         int error;
5229         offset_t off;
5230         char *fromname = NULL;
5231         int fd;
5232 
5233         error = nvlist_lookup_int32(innvl, "fd", &fd);
5234         if (error != 0)
5235                 return (SET_ERROR(EINVAL));
5236 
5237         (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5238 
5239         file_t *fp = getf(fd);
5240         if (fp == NULL)
5241                 return (SET_ERROR(EBADF));
5242 
5243         off = fp->f_offset;
5244         error = dmu_send(snapname, fromname, fd, fp->f_vnode, &off);
5245 
5246         if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5247                 fp->f_offset = off;
5248         releasef(fd);
5249         return (error);
5250 }
5251 
5252 /*
5253  * Determine approximately how large a zfs send stream will be -- the number
5254  * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5255  *
5256  * innvl: {
5257  *     (optional) "fromsnap" -> full snap name to send an incremental from
5258  * }
5259  *
5260  * outnvl: {
5261  *     "space" -> bytes of space (uint64)
5262  * }
5263  */
5264 static int
5265 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5266 {
5267         dsl_pool_t *dp;
5268         dsl_dataset_t *fromsnap = NULL;
5269         dsl_dataset_t *tosnap;
5270         int error;
5271         char *fromname;
5272         uint64_t space;
5273 
5274         error = dsl_pool_hold(snapname, FTAG, &dp);
5275         if (error != 0)
5276                 return (error);
5277 
5278         error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5279         if (error != 0) {
5280                 dsl_pool_rele(dp, FTAG);
5281                 return (error);
5282         }
5283 
5284         error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5285         if (error == 0) {
5286                 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5287                 if (error != 0) {
5288                         dsl_dataset_rele(tosnap, FTAG);
5289                         dsl_pool_rele(dp, FTAG);
5290                         return (error);
5291                 }
5292         }
5293 
5294         error = dmu_send_estimate(tosnap, fromsnap, &space);
5295         fnvlist_add_uint64(outnvl, "space", space);
5296 
5297         if (fromsnap != NULL)
5298                 dsl_dataset_rele(fromsnap, FTAG);
5299         dsl_dataset_rele(tosnap, FTAG);
5300         dsl_pool_rele(dp, FTAG);
5301         return (error);
5302 }
5303 
5304 
5305 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5306 
5307 static void
5308 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5309     zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5310     boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5311 {
5312         zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5313 
5314         ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5315         ASSERT3U(ioc, <, ZFS_IOC_LAST);
5316         ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5317         ASSERT3P(vec->zvec_func, ==, NULL);
5318 
5319         vec->zvec_legacy_func = func;
5320         vec->zvec_secpolicy = secpolicy;
5321         vec->zvec_namecheck = namecheck;
5322         vec->zvec_allow_log = log_history;
5323         vec->zvec_pool_check = pool_check;
5324 }
5325 
5326 /*
5327  * See the block comment at the beginning of this file for details on
5328  * each argument to this function.
5329  */
5330 static void
5331 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5332     zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5333     zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5334     boolean_t allow_log)
5335 {
5336         zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5337 
5338         ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5339         ASSERT3U(ioc, <, ZFS_IOC_LAST);
5340         ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5341         ASSERT3P(vec->zvec_func, ==, NULL);
5342 
5343         /* if we are logging, the name must be valid */
5344         ASSERT(!allow_log || namecheck != NO_NAME);
5345 
5346         vec->zvec_name = name;
5347         vec->zvec_func = func;
5348         vec->zvec_secpolicy = secpolicy;
5349         vec->zvec_namecheck = namecheck;
5350         vec->zvec_pool_check = pool_check;
5351         vec->zvec_smush_outnvlist = smush_outnvlist;
5352         vec->zvec_allow_log = allow_log;
5353 }
5354 
5355 static void
5356 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5357     zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5358     zfs_ioc_poolcheck_t pool_check)
5359 {
5360         zfs_ioctl_register_legacy(ioc, func, secpolicy,
5361             POOL_NAME, log_history, pool_check);
5362 }
5363 
5364 static void
5365 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5366     zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5367 {
5368         zfs_ioctl_register_legacy(ioc, func, secpolicy,
5369             DATASET_NAME, B_FALSE, pool_check);
5370 }
5371 
5372 static void
5373 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5374 {
5375         zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5376             POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5377 }
5378 
5379 static void
5380 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5381     zfs_secpolicy_func_t *secpolicy)
5382 {
5383         zfs_ioctl_register_legacy(ioc, func, secpolicy,
5384             NO_NAME, B_FALSE, POOL_CHECK_NONE);
5385 }
5386 
5387 static void
5388 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5389     zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5390 {
5391         zfs_ioctl_register_legacy(ioc, func, secpolicy,
5392             DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5393 }
5394 
5395 static void
5396 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5397 {
5398         zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5399             zfs_secpolicy_read);
5400 }
5401 
5402 static void
5403 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5404         zfs_secpolicy_func_t *secpolicy)
5405 {
5406         zfs_ioctl_register_legacy(ioc, func, secpolicy,
5407             DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5408 }
5409 
5410 static void
5411 zfs_ioctl_init(void)
5412 {
5413         zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5414             zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5415             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5416 
5417         zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5418             zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5419             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5420 
5421         zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5422             zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5423             POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5424 
5425         zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5426             zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5427             POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5428 
5429         zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5430             zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5431             POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5432 
5433         zfs_ioctl_register("create", ZFS_IOC_CREATE,
5434             zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5435             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5436 
5437         zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5438             zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5439             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5440 
5441         zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5442             zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5443             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5444 
5445         zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5446             zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5447             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5448         zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5449             zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5450             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5451 
5452         zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5453             zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5454             POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5455 
5456         zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5457             zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5458             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5459 
5460         zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK,
5461             zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME,
5462             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5463 
5464         zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS,
5465             zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME,
5466             POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5467 
5468         zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS,
5469             zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks,
5470             POOL_NAME,
5471             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5472 
5473         /* IOCTLS that use the legacy function signature */
5474 
5475         zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5476             zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5477 
5478         zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5479             zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5480         zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5481             zfs_ioc_pool_scan);
5482         zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5483             zfs_ioc_pool_upgrade);
5484         zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5485             zfs_ioc_vdev_add);
5486         zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5487             zfs_ioc_vdev_remove);
5488         zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5489             zfs_ioc_vdev_set_state);
5490         zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5491             zfs_ioc_vdev_attach);
5492         zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5493             zfs_ioc_vdev_detach);
5494         zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5495             zfs_ioc_vdev_setpath);
5496         zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5497             zfs_ioc_vdev_setfru);
5498         zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5499             zfs_ioc_pool_set_props);
5500         zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5501             zfs_ioc_vdev_split);
5502         zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5503             zfs_ioc_pool_reguid);
5504 
5505         zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5506             zfs_ioc_pool_configs, zfs_secpolicy_none);
5507         zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5508             zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5509         zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5510             zfs_ioc_inject_fault, zfs_secpolicy_inject);
5511         zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5512             zfs_ioc_clear_fault, zfs_secpolicy_inject);
5513         zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5514             zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5515 
5516         /*
5517          * pool destroy, and export don't log the history as part of
5518          * zfsdev_ioctl, but rather zfs_ioc_pool_export
5519          * does the logging of those commands.
5520          */
5521         zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5522             zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5523         zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5524             zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5525 
5526         zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5527             zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5528         zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5529             zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5530 
5531         zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5532             zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5533         zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5534             zfs_ioc_dsobj_to_dsname,
5535             zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5536         zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5537             zfs_ioc_pool_get_history,
5538             zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5539 
5540         zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5541             zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5542 
5543         zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5544             zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5545         zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5546             zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5547 
5548         zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5549             zfs_ioc_space_written);
5550         zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5551             zfs_ioc_objset_recvd_props);
5552         zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5553             zfs_ioc_next_obj);
5554         zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5555             zfs_ioc_get_fsacl);
5556         zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5557             zfs_ioc_objset_stats);
5558         zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5559             zfs_ioc_objset_zplprops);
5560         zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5561             zfs_ioc_dataset_list_next);
5562         zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5563             zfs_ioc_snapshot_list_next);
5564         zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5565             zfs_ioc_send_progress);
5566 
5567         zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5568             zfs_ioc_diff, zfs_secpolicy_diff);
5569         zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5570             zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5571         zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5572             zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5573         zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5574             zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5575         zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5576             zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5577         zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5578             zfs_ioc_send, zfs_secpolicy_send);
5579 
5580         zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5581             zfs_secpolicy_none);
5582         zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5583             zfs_secpolicy_destroy);
5584         zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5585             zfs_secpolicy_rename);
5586         zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5587             zfs_secpolicy_recv);
5588         zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5589             zfs_secpolicy_promote);
5590         zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5591             zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5592         zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5593             zfs_secpolicy_set_fsacl);
5594 
5595         zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5596             zfs_secpolicy_share, POOL_CHECK_NONE);
5597         zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5598             zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5599         zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5600             zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5601             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5602         zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5603             zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5604             POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5605 }
5606 
5607 int
5608 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5609     zfs_ioc_poolcheck_t check)
5610 {
5611         spa_t *spa;
5612         int error;
5613 
5614         ASSERT(type == POOL_NAME || type == DATASET_NAME);
5615 
5616         if (check & POOL_CHECK_NONE)
5617                 return (0);
5618 
5619         error = spa_open(name, &spa, FTAG);
5620         if (error == 0) {
5621                 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5622                         error = SET_ERROR(EAGAIN);
5623                 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5624                         error = SET_ERROR(EROFS);
5625                 spa_close(spa, FTAG);
5626         }
5627         return (error);
5628 }
5629 
5630 /*
5631  * Find a free minor number.
5632  */
5633 minor_t
5634 zfsdev_minor_alloc(void)
5635 {
5636         static minor_t last_minor;
5637         minor_t m;
5638 
5639         ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5640 
5641         for (m = last_minor + 1; m != last_minor; m++) {
5642                 if (m > ZFSDEV_MAX_MINOR)
5643                         m = 1;
5644                 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5645                         last_minor = m;
5646                         return (m);
5647                 }
5648         }
5649 
5650         return (0);
5651 }
5652 
5653 static int
5654 zfs_ctldev_init(dev_t *devp)
5655 {
5656         minor_t minor;
5657         zfs_soft_state_t *zs;
5658 
5659         ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5660         ASSERT(getminor(*devp) == 0);
5661 
5662         minor = zfsdev_minor_alloc();
5663         if (minor == 0)
5664                 return (SET_ERROR(ENXIO));
5665 
5666         if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5667                 return (SET_ERROR(EAGAIN));
5668 
5669         *devp = makedevice(getemajor(*devp), minor);
5670 
5671         zs = ddi_get_soft_state(zfsdev_state, minor);
5672         zs->zss_type = ZSST_CTLDEV;
5673         zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5674 
5675         return (0);
5676 }
5677 
5678 static void
5679 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5680 {
5681         ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5682 
5683         zfs_onexit_destroy(zo);
5684         ddi_soft_state_free(zfsdev_state, minor);
5685 }
5686 
5687 void *
5688 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5689 {
5690         zfs_soft_state_t *zp;
5691 
5692         zp = ddi_get_soft_state(zfsdev_state, minor);
5693         if (zp == NULL || zp->zss_type != which)
5694                 return (NULL);
5695 
5696         return (zp->zss_data);
5697 }
5698 
5699 static int
5700 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5701 {
5702         int error = 0;
5703 
5704         if (getminor(*devp) != 0)
5705                 return (zvol_open(devp, flag, otyp, cr));
5706 
5707         /* This is the control device. Allocate a new minor if requested. */
5708         if (flag & FEXCL) {
5709                 mutex_enter(&zfsdev_state_lock);
5710                 error = zfs_ctldev_init(devp);
5711                 mutex_exit(&zfsdev_state_lock);
5712         }
5713 
5714         return (error);
5715 }
5716 
5717 static int
5718 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5719 {
5720         zfs_onexit_t *zo;
5721         minor_t minor = getminor(dev);
5722 
5723         if (minor == 0)
5724                 return (0);
5725 
5726         mutex_enter(&zfsdev_state_lock);
5727         zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5728         if (zo == NULL) {
5729                 mutex_exit(&zfsdev_state_lock);
5730                 return (zvol_close(dev, flag, otyp, cr));
5731         }
5732         zfs_ctldev_destroy(zo, minor);
5733         mutex_exit(&zfsdev_state_lock);
5734 
5735         return (0);
5736 }
5737 
5738 static int
5739 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5740 {
5741         zfs_cmd_t *zc;
5742         uint_t vecnum;
5743         int error, rc, len;
5744         minor_t minor = getminor(dev);
5745         const zfs_ioc_vec_t *vec;
5746         char *saved_poolname = NULL;
5747         nvlist_t *innvl = NULL;
5748 
5749         if (minor != 0 &&
5750             zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5751                 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5752 
5753         vecnum = cmd - ZFS_IOC_FIRST;
5754         ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5755 
5756         if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5757                 return (SET_ERROR(EINVAL));
5758         vec = &zfs_ioc_vec[vecnum];
5759 
5760         zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5761 
5762         error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5763         if (error != 0) {
5764                 error = SET_ERROR(EFAULT);
5765                 goto out;
5766         }
5767 
5768         zc->zc_iflags = flag & FKIOCTL;
5769         if (zc->zc_nvlist_src_size != 0) {
5770                 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5771                     zc->zc_iflags, &innvl);
5772                 if (error != 0)
5773                         goto out;
5774         }
5775 
5776         /*
5777          * Ensure that all pool/dataset names are valid before we pass down to
5778          * the lower layers.
5779          */
5780         zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5781         switch (vec->zvec_namecheck) {
5782         case POOL_NAME:
5783                 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5784                         error = SET_ERROR(EINVAL);
5785                 else
5786                         error = pool_status_check(zc->zc_name,
5787                             vec->zvec_namecheck, vec->zvec_pool_check);
5788                 break;
5789 
5790         case DATASET_NAME:
5791                 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5792                         error = SET_ERROR(EINVAL);
5793                 else
5794                         error = pool_status_check(zc->zc_name,
5795                             vec->zvec_namecheck, vec->zvec_pool_check);
5796                 break;
5797 
5798         case NO_NAME:
5799                 break;
5800         }
5801 
5802 
5803         if (error == 0 && !(flag & FKIOCTL))
5804                 error = vec->zvec_secpolicy(zc, innvl, cr);
5805 
5806         if (error != 0)
5807                 goto out;
5808 
5809         /* legacy ioctls can modify zc_name */
5810         len = strcspn(zc->zc_name, "/@#") + 1;
5811         saved_poolname = kmem_alloc(len, KM_SLEEP);
5812         (void) strlcpy(saved_poolname, zc->zc_name, len);
5813 
5814         if (vec->zvec_func != NULL) {
5815                 nvlist_t *outnvl;
5816                 int puterror = 0;
5817                 spa_t *spa;
5818                 nvlist_t *lognv = NULL;
5819 
5820                 ASSERT(vec->zvec_legacy_func == NULL);
5821 
5822                 /*
5823                  * Add the innvl to the lognv before calling the func,
5824                  * in case the func changes the innvl.
5825                  */
5826                 if (vec->zvec_allow_log) {
5827                         lognv = fnvlist_alloc();
5828                         fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5829                             vec->zvec_name);
5830                         if (!nvlist_empty(innvl)) {
5831                                 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5832                                     innvl);
5833                         }
5834                 }
5835 
5836                 outnvl = fnvlist_alloc();
5837                 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5838 
5839                 if (error == 0 && vec->zvec_allow_log &&
5840                     spa_open(zc->zc_name, &spa, FTAG) == 0) {
5841                         if (!nvlist_empty(outnvl)) {
5842                                 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5843                                     outnvl);
5844                         }
5845                         (void) spa_history_log_nvl(spa, lognv);
5846                         spa_close(spa, FTAG);
5847                 }
5848                 fnvlist_free(lognv);
5849 
5850                 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5851                         int smusherror = 0;
5852                         if (vec->zvec_smush_outnvlist) {
5853                                 smusherror = nvlist_smush(outnvl,
5854                                     zc->zc_nvlist_dst_size);
5855                         }
5856                         if (smusherror == 0)
5857                                 puterror = put_nvlist(zc, outnvl);
5858                 }
5859 
5860                 if (puterror != 0)
5861                         error = puterror;
5862 
5863                 nvlist_free(outnvl);
5864         } else {
5865                 error = vec->zvec_legacy_func(zc);
5866         }
5867 
5868 out:
5869         nvlist_free(innvl);
5870         rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5871         if (error == 0 && rc != 0)
5872                 error = SET_ERROR(EFAULT);
5873         if (error == 0 && vec->zvec_allow_log) {
5874                 char *s = tsd_get(zfs_allow_log_key);
5875                 if (s != NULL)
5876                         strfree(s);
5877                 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5878         } else {
5879                 if (saved_poolname != NULL)
5880                         strfree(saved_poolname);
5881         }
5882 
5883         kmem_free(zc, sizeof (zfs_cmd_t));
5884         return (error);
5885 }
5886 
5887 static int
5888 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5889 {
5890         if (cmd != DDI_ATTACH)
5891                 return (DDI_FAILURE);
5892 
5893         if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5894             DDI_PSEUDO, 0) == DDI_FAILURE)
5895                 return (DDI_FAILURE);
5896 
5897         zfs_dip = dip;
5898 
5899         ddi_report_dev(dip);
5900 
5901         return (DDI_SUCCESS);
5902 }
5903 
5904 static int
5905 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5906 {
5907         if (spa_busy() || zfs_busy() || zvol_busy())
5908                 return (DDI_FAILURE);
5909 
5910         if (cmd != DDI_DETACH)
5911                 return (DDI_FAILURE);
5912 
5913         zfs_dip = NULL;
5914 
5915         ddi_prop_remove_all(dip);
5916         ddi_remove_minor_node(dip, NULL);
5917 
5918         return (DDI_SUCCESS);
5919 }
5920 
5921 /*ARGSUSED*/
5922 static int
5923 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5924 {
5925         switch (infocmd) {
5926         case DDI_INFO_DEVT2DEVINFO:
5927                 *result = zfs_dip;
5928                 return (DDI_SUCCESS);
5929 
5930         case DDI_INFO_DEVT2INSTANCE:
5931                 *result = (void *)0;
5932                 return (DDI_SUCCESS);
5933         }
5934 
5935         return (DDI_FAILURE);
5936 }
5937 
5938 /*
5939  * OK, so this is a little weird.
5940  *
5941  * /dev/zfs is the control node, i.e. minor 0.
5942  * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5943  *
5944  * /dev/zfs has basically nothing to do except serve up ioctls,
5945  * so most of the standard driver entry points are in zvol.c.
5946  */
5947 static struct cb_ops zfs_cb_ops = {
5948         zfsdev_open,    /* open */
5949         zfsdev_close,   /* close */
5950         zvol_strategy,  /* strategy */
5951         nodev,          /* print */
5952         zvol_dump,      /* dump */
5953         zvol_read,      /* read */
5954         zvol_write,     /* write */
5955         zfsdev_ioctl,   /* ioctl */
5956         nodev,          /* devmap */
5957         nodev,          /* mmap */
5958         nodev,          /* segmap */
5959         nochpoll,       /* poll */
5960         ddi_prop_op,    /* prop_op */
5961         NULL,           /* streamtab */
5962         D_NEW | D_MP | D_64BIT,         /* Driver compatibility flag */
5963         CB_REV,         /* version */
5964         nodev,          /* async read */
5965         nodev,          /* async write */
5966 };
5967 
5968 static struct dev_ops zfs_dev_ops = {
5969         DEVO_REV,       /* version */
5970         0,              /* refcnt */
5971         zfs_info,       /* info */
5972         nulldev,        /* identify */
5973         nulldev,        /* probe */
5974         zfs_attach,     /* attach */
5975         zfs_detach,     /* detach */
5976         nodev,          /* reset */
5977         &zfs_cb_ops,        /* driver operations */
5978         NULL,           /* no bus operations */
5979         NULL,           /* power */
5980         ddi_quiesce_not_needed, /* quiesce */
5981 };
5982 
5983 static struct modldrv zfs_modldrv = {
5984         &mod_driverops,
5985         "ZFS storage pool",
5986         &zfs_dev_ops
5987 };
5988 
5989 static struct modlinkage modlinkage = {
5990         MODREV_1,
5991         (void *)&zfs_modlfs,
5992         (void *)&zfs_modldrv,
5993         NULL
5994 };
5995 
5996 static void
5997 zfs_allow_log_destroy(void *arg)
5998 {
5999         char *poolname = arg;
6000         strfree(poolname);
6001 }
6002 
6003 int
6004 _init(void)
6005 {
6006         int error;
6007 
6008         spa_init(FREAD | FWRITE);
6009         zfs_init();
6010         zvol_init();
6011         zfs_ioctl_init();
6012 
6013         if ((error = mod_install(&modlinkage)) != 0) {
6014                 zvol_fini();
6015                 zfs_fini();
6016                 spa_fini();
6017                 return (error);
6018         }
6019 
6020         tsd_create(&zfs_fsyncer_key, NULL);
6021         tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
6022         tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
6023 
6024         error = ldi_ident_from_mod(&modlinkage, &zfs_li);
6025         ASSERT(error == 0);
6026         mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
6027 
6028         return (0);
6029 }
6030 
6031 int
6032 _fini(void)
6033 {
6034         int error;
6035 
6036         if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
6037                 return (SET_ERROR(EBUSY));
6038 
6039         if ((error = mod_remove(&modlinkage)) != 0)
6040                 return (error);
6041 
6042         zvol_fini();
6043         zfs_fini();
6044         spa_fini();
6045         if (zfs_nfsshare_inited)
6046                 (void) ddi_modclose(nfs_mod);
6047         if (zfs_smbshare_inited)
6048                 (void) ddi_modclose(smbsrv_mod);
6049         if (zfs_nfsshare_inited || zfs_smbshare_inited)
6050                 (void) ddi_modclose(sharefs_mod);
6051 
6052         tsd_destroy(&zfs_fsyncer_key);
6053         ldi_ident_release(zfs_li);
6054         zfs_li = NULL;
6055         mutex_destroy(&zfs_share_lock);
6056 
6057         return (error);
6058 }
6059 
6060 int
6061 _info(struct modinfo *modinfop)
6062 {
6063         return (mod_info(&modlinkage, modinfop));
6064 }
--- EOF ---