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zfs_ioctl.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/errno.h>
#include <syslog.h>
#include <sys/uio.h>
#include <sys/buf.h>
#include <sys/modctl.h>
#include <sys/open.h>
#include <sys/file.h>
#include <sys/kmem.h>
#include <sys/conf.h>
#include <sys/cmn_err.h>
#include <sys/stat.h>
#include <sys/zfs_ioctl.h>
#include <sys/zfs_znode.h>
#include <sys/zap.h>
#include <sys/spa.h>
#include <sys/spa_impl.h>
#include <sys/vdev.h>
#include <sys/vdev_impl.h>
#include <sys/dmu.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_prop.h>
#include <sys/dsl_deleg.h>
#include <sys/dmu_objset.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/sunldi.h>
#include <sys/policy.h>
#include <sys/zone.h>
#include <sys/nvpair.h>
#include <sys/pathname.h>
#include <sys/mount.h>
#include <sys/sdt.h>
#include <sys/fs/zfs.h>
#include <sys/zfs_ctldir.h>
#include <sys/zfs_dir.h>
#include <sys/zvol.h>
#include <sharefs/share.h>
#include <sys/dmu_objset.h>

#include "zfs_namecheck.h"
#include "zfs_prop.h"
#include "zfs_deleg.h"

extern struct modlfs zfs_modlfs;

extern void zfs_init(void);
extern void zfs_fini(void);

ldi_ident_t zfs_li = NULL;
dev_info_t *zfs_dip;

typedef int zfs_ioc_func_t(zfs_cmd_t *);
typedef int zfs_secpolicy_func_t(zfs_cmd_t *, cred_t *);

typedef enum {
      NO_NAME,
      POOL_NAME,
      DATASET_NAME
} zfs_ioc_namecheck_t;

typedef struct zfs_ioc_vec {
      zfs_ioc_func_t          *zvec_func;
      zfs_secpolicy_func_t    *zvec_secpolicy;
      zfs_ioc_namecheck_t     zvec_namecheck;
      boolean_t         zvec_his_log;
      boolean_t         zvec_pool_check;
} zfs_ioc_vec_t;

/* This array is indexed by zfs_userquota_prop_t */
static const char *userquota_perms[] = {
      ZFS_DELEG_PERM_USERUSED,
      ZFS_DELEG_PERM_USERQUOTA,
      ZFS_DELEG_PERM_GROUPUSED,
      ZFS_DELEG_PERM_GROUPQUOTA,
};

static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
static void clear_props(char *dataset, nvlist_t *props, nvlist_t *newprops);
static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
    boolean_t *);
int zfs_set_prop_nvlist(const char *, nvlist_t *);

/* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
void
__dprintf(const char *file, const char *func, int line, const char *fmt, ...)
{
      const char *newfile;
      char buf[256];
      va_list adx;

      /*
       * Get rid of annoying "../common/" prefix to filename.
       */
      newfile = strrchr(file, '/');
      if (newfile != NULL) {
            newfile = newfile + 1; /* Get rid of leading / */
      } else {
            newfile = file;
      }

      va_start(adx, fmt);
      (void) vsnprintf(buf, sizeof (buf), fmt, adx);
      va_end(adx);

//    fprintf(stderr, "%s", buf);

      /*
       * To get this data, use the zfs-dprintf probe as so:
       * dtrace -q -n 'zfs-dprintf \
       *    /stringof(arg0) == "dbuf.c"/ \
       *    {printf("%s: %s", stringof(arg1), stringof(arg3))}'
       * arg0 = file name
       * arg1 = function name
       * arg2 = line number
       * arg3 = message
       */
      DTRACE_PROBE4(zfs__dprintf,
          char *, newfile, char *, func, int, line, char *, buf);
}

static void
history_str_free(char *buf)
{
      kmem_free(buf, HIS_MAX_RECORD_LEN);
}

static char *
history_str_get(zfs_cmd_t *zc)
{
      char *buf;

      if (zc->zc_history == 0)
            return (NULL);

      buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
      if (copyinstr((void *)(uintptr_t)zc->zc_history,
          buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
            history_str_free(buf);
            return (NULL);
      }

      buf[HIS_MAX_RECORD_LEN -1] = '\0';

      return (buf);
}

/*
 * Check to see if the named dataset is currently defined as bootable
 */
static boolean_t
zfs_is_bootfs(const char *name)
{
      spa_t *spa;
      boolean_t ret = B_FALSE;

      if (spa_open(name, &spa, FTAG) == 0) {
            if (spa->spa_bootfs) {
                  objset_t *os;

                  if (dmu_objset_open(name, DMU_OST_ZFS,
                      DS_MODE_USER | DS_MODE_READONLY, &os) == 0) {
                        ret = (dmu_objset_id(os) == spa->spa_bootfs);
                        dmu_objset_close(os);
                  }
            }
            spa_close(spa, FTAG);
      }
      return (ret);
}

/*
 * zfs_earlier_version
 *
 *    Return non-zero if the spa version is less than requested version.
 */
static int
zfs_earlier_version(const char *name, int version)
{
      spa_t *spa;

      if (spa_open(name, &spa, FTAG) == 0) {
            if (spa_version(spa) < version) {
                  spa_close(spa, FTAG);
                  return (1);
            }
            spa_close(spa, FTAG);
      }
      return (0);
}

/*
 * zpl_earlier_version
 *
 * Return TRUE if the ZPL version is less than requested version.
 */
static boolean_t
zpl_earlier_version(const char *name, int version)
{
      objset_t *os;
      boolean_t rc = B_TRUE;

      if (dmu_objset_open(name, DMU_OST_ANY,
          DS_MODE_USER | DS_MODE_READONLY, &os) == 0) {
            uint64_t zplversion;

            if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
                  rc = zplversion < version;
            dmu_objset_close(os);
      }
      return (rc);
}

static void
zfs_log_history(zfs_cmd_t *zc)
{
      spa_t *spa;
      char *buf;

      if ((buf = history_str_get(zc)) == NULL)
            return;

      if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
            if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
                  (void) spa_history_log(spa, buf, LOG_CMD_NORMAL);
            spa_close(spa, FTAG);
      }
      history_str_free(buf);
}

/*
 * Policy for top-level read operations (list pools).  Requires no privileges,
 * and can be used in the local zone, as there is no associated dataset.
 */
/* ARGSUSED */
static int
zfs_secpolicy_none(zfs_cmd_t *zc, cred_t *cr)
{
      return (0);
}

/*
 * Policy for dataset read operations (list children, get statistics).  Requires
 * no privileges, but must be visible in the local zone.
 */
/* ARGSUSED */
static int
zfs_secpolicy_read(zfs_cmd_t *zc, cred_t *cr)
{
      if (INGLOBALZONE(curproc) ||
          zone_dataset_visible(zc->zc_name, NULL))
            return (0);

      return (ENOENT);
}

static int
zfs_dozonecheck(const char *dataset, cred_t *cr)
{
      uint64_t zoned;
      int writable = 1;

      /*
       * The dataset must be visible by this zone -- check this first
       * so they don't see EPERM on something they shouldn't know about.
       */
      if (!INGLOBALZONE(curproc) &&
          !zone_dataset_visible(dataset, &writable))
            return (ENOENT);

      if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
            return (ENOENT);

      if (INGLOBALZONE(curproc)) {
            /*
             * If the fs is zoned, only root can access it from the
             * global zone.
             */
            if (secpolicy_zfs(cr) && zoned)
                  return (EPERM);
      } else {
            /*
             * If we are in a local zone, the 'zoned' property must be set.
             */
            if (!zoned)
                  return (EPERM);

            /* must be writable by this zone */
            if (!writable)
                  return (EPERM);
      }
      return (0);
}

int
zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
{
      int error;

      error = zfs_dozonecheck(name, cr);
      if (error == 0) {
            error = secpolicy_zfs(cr);
            if (error)
                  error = dsl_deleg_access(name, perm, cr);
      }
      return (error);
}

static int
zfs_secpolicy_setprop(const char *name, zfs_prop_t prop, cred_t *cr)
{
      /*
       * Check permissions for special properties.
       */
      switch (prop) {
      case ZFS_PROP_ZONED:
            /*
             * Disallow setting of 'zoned' from within a local zone.
             */
            if (!INGLOBALZONE(curproc))
                  return (EPERM);
            break;

      case ZFS_PROP_QUOTA:
            if (!INGLOBALZONE(curproc)) {
                  uint64_t zoned;
                  char setpoint[MAXNAMELEN];
                  /*
                   * Unprivileged users are allowed to modify the
                   * quota on things *under* (ie. contained by)
                   * the thing they own.
                   */
                  if (dsl_prop_get_integer(name, "zoned", &zoned,
                      setpoint))
                        return (EPERM);
                  if (!zoned || strlen(name) <= strlen(setpoint))
                        return (EPERM);
            }
            break;
      }

      return (zfs_secpolicy_write_perms(name, zfs_prop_to_name(prop), cr));
}

int
zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr)
{
      int error;

      error = zfs_dozonecheck(zc->zc_name, cr);
      if (error)
            return (error);

      /*
       * permission to set permissions will be evaluated later in
       * dsl_deleg_can_allow()
       */
      return (0);
}

int
zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr)
{
      int error;
      error = zfs_secpolicy_write_perms(zc->zc_name,
          ZFS_DELEG_PERM_ROLLBACK, cr);
      if (error == 0)
            error = zfs_secpolicy_write_perms(zc->zc_name,
                ZFS_DELEG_PERM_MOUNT, cr);
      return (error);
}

int
zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr)
{
      return (zfs_secpolicy_write_perms(zc->zc_name,
          ZFS_DELEG_PERM_SEND, cr));
}

#if 0
/* Optimized out, lookupname is not defined anywhere so
 * compliation fails if we don't comment this one out */
static int
zfs_secpolicy_deleg_share(zfs_cmd_t *zc, cred_t *cr)
{
      vnode_t *vp;
      int error;

      if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
          NO_FOLLOW, NULL, &vp)) != 0)
            return (error);

      /* Now make sure mntpnt and dataset are ZFS */

      if (vp->v_vfsp->vfs_fstype != zfsfstype ||
          (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
          zc->zc_name) != 0)) {
            VN_RELE(vp);
            return (EPERM);
      }

      VN_RELE(vp);
      return (dsl_deleg_access(zc->zc_name,
          ZFS_DELEG_PERM_SHARE, cr));
}
#endif

int
zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr)
{
      /* ZFS-FUSE: not supported */
      return ENOTSUP;
#if 0
      if (!INGLOBALZONE(curproc))
            return (EPERM);

      if (secpolicy_nfs(cr) == 0) {
            return (0);
      } else {
            return (zfs_secpolicy_deleg_share(zc, cr));
      }
#endif
}

int
zfs_secpolicy_smb_acl(zfs_cmd_t *zc, cred_t *cr)
{
        /* ZFS-FUSE: not supported */
        return ENOTSUP;
#if 0

      if (!INGLOBALZONE(curproc))
            return (EPERM);

      if (secpolicy_smb(cr) == 0) {
            return (0);
      } else {
            return (zfs_secpolicy_deleg_share(zc, cr));
      }
#endif
}

static int
zfs_get_parent(const char *datasetname, char *parent, int parentsize)
{
      char *cp;

      /*
       * Remove the @bla or /bla from the end of the name to get the parent.
       */
      (void) strncpy(parent, datasetname, parentsize);
      cp = strrchr(parent, '@');
      if (cp != NULL) {
            cp[0] = '\0';
      } else {
            cp = strrchr(parent, '/');
            if (cp == NULL)
                  return (ENOENT);
            cp[0] = '\0';
      }

      return (0);
}

int
zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
{
      int error;

      if ((error = zfs_secpolicy_write_perms(name,
          ZFS_DELEG_PERM_MOUNT, cr)) != 0)
            return (error);

      return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
}

static int
zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr)
{
      return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
}

/*
 * Must have sys_config privilege to check the iscsi permission
 */
/* ARGSUSED */
static int
zfs_secpolicy_iscsi(zfs_cmd_t *zc, cred_t *cr)
{
      return (secpolicy_zfs(cr));
}

int
zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
{
      char  parentname[MAXNAMELEN];
      int   error;

      if ((error = zfs_secpolicy_write_perms(from,
          ZFS_DELEG_PERM_RENAME, cr)) != 0)
            return (error);

      if ((error = zfs_secpolicy_write_perms(from,
          ZFS_DELEG_PERM_MOUNT, cr)) != 0)
            return (error);

      if ((error = zfs_get_parent(to, parentname,
          sizeof (parentname))) != 0)
            return (error);

      if ((error = zfs_secpolicy_write_perms(parentname,
          ZFS_DELEG_PERM_CREATE, cr)) != 0)
            return (error);

      if ((error = zfs_secpolicy_write_perms(parentname,
          ZFS_DELEG_PERM_MOUNT, cr)) != 0)
            return (error);

      return (error);
}

static int
zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr)
{
      return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
}

static int
zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr)
{
      char  parentname[MAXNAMELEN];
      objset_t *clone;
      int error;

      error = zfs_secpolicy_write_perms(zc->zc_name,
          ZFS_DELEG_PERM_PROMOTE, cr);
      if (error)
            return (error);

      error = dmu_objset_open(zc->zc_name, DMU_OST_ANY,
          DS_MODE_USER | DS_MODE_READONLY, &clone);

      if (error == 0) {
            dsl_dataset_t *pclone = NULL;
            dsl_dir_t *dd;
            dd = clone->os->os_dsl_dataset->ds_dir;

            rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
            error = dsl_dataset_hold_obj(dd->dd_pool,
                dd->dd_phys->dd_origin_obj, FTAG, &pclone);
            rw_exit(&dd->dd_pool->dp_config_rwlock);
            if (error) {
                  dmu_objset_close(clone);
                  return (error);
            }

            error = zfs_secpolicy_write_perms(zc->zc_name,
                ZFS_DELEG_PERM_MOUNT, cr);

            dsl_dataset_name(pclone, parentname);
            dmu_objset_close(clone);
            dsl_dataset_rele(pclone, FTAG);
            if (error == 0)
                  error = zfs_secpolicy_write_perms(parentname,
                      ZFS_DELEG_PERM_PROMOTE, cr);
      }
      return (error);
}

static int
zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr)
{
      int error;

      if ((error = zfs_secpolicy_write_perms(zc->zc_name,
          ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
            return (error);

      if ((error = zfs_secpolicy_write_perms(zc->zc_name,
          ZFS_DELEG_PERM_MOUNT, cr)) != 0)
            return (error);

      return (zfs_secpolicy_write_perms(zc->zc_name,
          ZFS_DELEG_PERM_CREATE, cr));
}

int
zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
{
      int error;

      if ((error = zfs_secpolicy_write_perms(name,
          ZFS_DELEG_PERM_SNAPSHOT, cr)) != 0)
            return (error);

      error = zfs_secpolicy_write_perms(name,
          ZFS_DELEG_PERM_MOUNT, cr);

      return (error);
}

static int
zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr)
{

      return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr));
}

static int
zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr)
{
      char  parentname[MAXNAMELEN];
      int   error;

      if ((error = zfs_get_parent(zc->zc_name, parentname,
          sizeof (parentname))) != 0)
            return (error);

      if (zc->zc_value[0] != '\0') {
            if ((error = zfs_secpolicy_write_perms(zc->zc_value,
                ZFS_DELEG_PERM_CLONE, cr)) != 0)
                  return (error);
      }

      if ((error = zfs_secpolicy_write_perms(parentname,
          ZFS_DELEG_PERM_CREATE, cr)) != 0)
            return (error);

      error = zfs_secpolicy_write_perms(parentname,
          ZFS_DELEG_PERM_MOUNT, cr);

      return (error);
}

static int
zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr)
{
      int error;

      error = secpolicy_fs_unmount(cr, NULL);
      if (error) {
            error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr);
      }
      return (error);
}

/*
 * Policy for pool operations - create/destroy pools, add vdevs, etc.  Requires
 * SYS_CONFIG privilege, which is not available in a local zone.
 */
/* ARGSUSED */
static int
zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr)
{
      if (secpolicy_sys_config(cr, B_FALSE) != 0)
            return (EPERM);

      return (0);
}

/*
 * Just like zfs_secpolicy_config, except that we will check for
 * mount permission on the dataset for permission to create/remove
 * the minor nodes.
 */
static int
zfs_secpolicy_minor(zfs_cmd_t *zc, cred_t *cr)
{
      if (secpolicy_sys_config(cr, B_FALSE) != 0) {
            return (dsl_deleg_access(zc->zc_name,
                ZFS_DELEG_PERM_MOUNT, cr));
      }

      return (0);
}

/*
 * Policy for fault injection.  Requires all privileges.
 */
/* ARGSUSED */
static int
zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr)
{
      return (secpolicy_zinject(cr));
}

static int
zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr)
{
      zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);

      if (prop == ZPROP_INVAL) {
            if (!zfs_prop_user(zc->zc_value))
                  return (EINVAL);
            return (zfs_secpolicy_write_perms(zc->zc_name,
                ZFS_DELEG_PERM_USERPROP, cr));
      } else {
            if (!zfs_prop_inheritable(prop))
                  return (EINVAL);
            return (zfs_secpolicy_setprop(zc->zc_name, prop, cr));
      }
}

static int
zfs_secpolicy_userspace_one(zfs_cmd_t *zc, cred_t *cr)
{
      int err = zfs_secpolicy_read(zc, cr);
      if (err)
            return (err);

      if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
            return (EINVAL);

      if (zc->zc_value[0] == 0) {
            /*
             * They are asking about a posix uid/gid.  If it's
             * themself, allow it.
             */
            if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
                zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
                  if (zc->zc_guid == crgetuid(cr))
                        return (0);
            } else {
                  if (groupmember(zc->zc_guid, cr))
                        return (0);
            }
      }

      return (zfs_secpolicy_write_perms(zc->zc_name,
          userquota_perms[zc->zc_objset_type], cr));
}

static int
zfs_secpolicy_userspace_many(zfs_cmd_t *zc, cred_t *cr)
{
      int err = zfs_secpolicy_read(zc, cr);
      if (err)
            return (err);

      if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
            return (EINVAL);

      return (zfs_secpolicy_write_perms(zc->zc_name,
          userquota_perms[zc->zc_objset_type], cr));
}

static int
zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, cred_t *cr)
{
      return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, cr));
}

/*
 * Returns the nvlist as specified by the user in the zfs_cmd_t.
 */
static int
get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
{
      char *packed;
      int error;
      nvlist_t *list = NULL;

      /*
       * Read in and unpack the user-supplied nvlist.
       */
      if (size == 0)
            return (EINVAL);

      packed = kmem_alloc(size, KM_SLEEP);

      if ((error = xcopyin((void *)(uintptr_t)nvl, packed, size)) != 0) {
            kmem_free(packed, size);
            return (error);
      }

      if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
            kmem_free(packed, size);
            return (error);
      }

      kmem_free(packed, size);

      *nvp = list;
      return (0);
}

static int
put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
{
      char *packed = NULL;
      size_t size;
      int error;

      VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0);

      if (size > zc->zc_nvlist_dst_size) {
            error = ENOMEM;
            syslog(LOG_WARNING,"put_nvlist: out of memory %d > %d",(unsigned int)size,
                   (unsigned int)zc->zc_nvlist_dst_size);
      } else {
            packed = kmem_alloc(size, KM_SLEEP);
            VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE,
                KM_SLEEP) == 0);
            error = xcopyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, size);
            kmem_free(packed, size);
            if (error)
              syslog(LOG_WARNING,"put_nvlist: error %s on xcopyout",strerror(error));
      }

      zc->zc_nvlist_dst_size = size;
      return (error);
}

static int
getzfsvfs(const char *dsname, zfsvfs_t **zvp)
{
      objset_t *os;
      int error;

      error = dmu_objset_open(dsname, DMU_OST_ZFS,
          DS_MODE_USER | DS_MODE_READONLY, &os);
      if (error)
            return (error);

      mutex_enter(&os->os->os_user_ptr_lock);
      *zvp = dmu_objset_get_user(os);
      if (*zvp) {
            VFS_HOLD((*zvp)->z_vfs);
      } else {
            error = ESRCH;
      }
      mutex_exit(&os->os->os_user_ptr_lock);
      dmu_objset_close(os);
      return (error);
}

/*
 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
 * case its z_vfs will be NULL, and it will be opened as the owner.
 */
static int
zfsvfs_hold(const char *name, boolean_t readonly, void *tag, zfsvfs_t **zvp)
{
      int error = 0;
      int mode = DS_MODE_OWNER | (readonly ? DS_MODE_READONLY : 0);

      if (getzfsvfs(name, zvp) != 0)
            error = zfsvfs_create(name, mode, zvp);
      if (error == 0) {
            rrw_enter(&(*zvp)->z_teardown_lock, RW_READER, tag);
            if ((*zvp)->z_unmounted) {
                  /*
                   * XXX we could probably try again, since the unmounting
                   * thread should be just about to disassociate the
                   * objset from the zfsvfs.
                   */
                  rrw_exit(&(*zvp)->z_teardown_lock, tag);
                  return (EBUSY);
            }
      }
      return (error);
}

static void
zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
{
      rrw_exit(&zfsvfs->z_teardown_lock, tag);

      if (zfsvfs->z_vfs) {
            VFS_RELE(zfsvfs->z_vfs);
      } else {
            dmu_objset_close(zfsvfs->z_os);
            zfsvfs_free(zfsvfs);
      }
}

static int
zfs_ioc_pool_create(zfs_cmd_t *zc)
{
      int error;
      nvlist_t *config, *props = NULL;
      nvlist_t *rootprops = NULL;
      nvlist_t *zplprops = NULL;
      char *buf;

      if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
          zc->zc_iflags, &config))
            return (error);

      if (zc->zc_nvlist_src_size != 0 && (error =
          get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &props))) {
            nvlist_free(config);
            return (error);
      }

      if (props) {
            nvlist_t *nvl = NULL;
            uint64_t version = SPA_VERSION;

            (void) nvlist_lookup_uint64(props,
                zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
            if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) {
                  error = EINVAL;
                  goto pool_props_bad;
            }
            (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
            if (nvl) {
                  error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
                  if (error != 0) {
                        nvlist_free(config);
                        nvlist_free(props);
                        return (error);
                  }
                  (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
            }
            VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
            error = zfs_fill_zplprops_root(version, rootprops,
                zplprops, NULL);
            if (error)
                  goto pool_props_bad;
      }

      buf = history_str_get(zc);

      error = spa_create(zc->zc_name, config, props, buf, zplprops);

      /*
       * Set the remaining root properties
       */
      if (!error &&
          (error = zfs_set_prop_nvlist(zc->zc_name, rootprops)) != 0)
            (void) spa_destroy(zc->zc_name);

      if (buf != NULL)
            history_str_free(buf);

pool_props_bad:
      nvlist_free(rootprops);
      nvlist_free(zplprops);
      nvlist_free(config);
      nvlist_free(props);

      return (error);
}

static int
zfs_ioc_pool_destroy(zfs_cmd_t *zc)
{
      int error;
      zfs_log_history(zc);
      error = spa_destroy(zc->zc_name);
      return (error);
}

static int
zfs_ioc_pool_import(zfs_cmd_t *zc)
{
      int error;
      nvlist_t *config, *props = NULL;
      uint64_t guid;

      if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
          zc->zc_iflags, &config)) != 0)
            return (error);

      if (zc->zc_nvlist_src_size != 0 && (error =
          get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &props))) {
            nvlist_free(config);
            return (error);
      }

      if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
          guid != zc->zc_guid)
            error = EINVAL;
      else if (zc->zc_cookie)
            error = spa_import_verbatim(zc->zc_name, config,
                props);
      else
            error = spa_import(zc->zc_name, config, props);

      nvlist_free(config);

      if (props)
            nvlist_free(props);

      return (error);
}

static int
zfs_ioc_pool_export(zfs_cmd_t *zc)
{
      int error;
      boolean_t force = (boolean_t)zc->zc_cookie;
      boolean_t hardforce = (boolean_t)zc->zc_guid;

      zfs_log_history(zc);
      error = spa_export(zc->zc_name, NULL, force, hardforce);
      return (error);
}

static int
zfs_ioc_pool_configs(zfs_cmd_t *zc)
{
      nvlist_t *configs;
      int error;

      if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
            return (EEXIST);

      error = put_nvlist(zc, configs);

      nvlist_free(configs);

      return (error);
}

static int
zfs_ioc_pool_stats(zfs_cmd_t *zc)
{
      nvlist_t *config;
      int error;
      int ret = 0;

      error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
          sizeof (zc->zc_value));

      if (config != NULL) {
            ret = put_nvlist(zc, config);
            nvlist_free(config);

            /*
             * The config may be present even if 'error' is non-zero.
             * In this case we return success, and preserve the real errno
             * in 'zc_cookie'.
             */
            zc->zc_cookie = error;
      } else {
            ret = error;
      }

      return (ret);
}

/*
 * Try to import the given pool, returning pool stats as appropriate so that
 * user land knows which devices are available and overall pool health.
 */
static int
zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
{
      nvlist_t *tryconfig, *config;
      int error;

      if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
          zc->zc_iflags, &tryconfig)) != 0)
            return (error);

      config = spa_tryimport(tryconfig);

      nvlist_free(tryconfig);

      if (config == NULL)
            return (EINVAL);

      error = put_nvlist(zc, config);
      nvlist_free(config);

      return (error);
}

static int
zfs_ioc_pool_scrub(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
            return (error);

      error = spa_scrub(spa, zc->zc_cookie);

      spa_close(spa, FTAG);

      return (error);
}

static int
zfs_ioc_pool_freeze(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;

      error = spa_open(zc->zc_name, &spa, FTAG);
      if (error == 0) {
            spa_freeze(spa);
            spa_close(spa, FTAG);
      }
      return (error);
}

static int
zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
            return (error);

      if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) {
            spa_close(spa, FTAG);
            return (EINVAL);
      }

      spa_upgrade(spa, zc->zc_cookie);
      spa_close(spa, FTAG);

      return (error);
}

static int
zfs_ioc_pool_get_history(zfs_cmd_t *zc)
{
      spa_t *spa;
      char *hist_buf;
      uint64_t size;
      int error;

      if ((size = zc->zc_history_len) == 0)
            return (EINVAL);

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
            return (error);

      if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
            spa_close(spa, FTAG);
            return (ENOTSUP);
      }

      hist_buf = kmem_alloc(size, KM_SLEEP);
      if ((error = spa_history_get(spa, &zc->zc_history_offset,
          &zc->zc_history_len, hist_buf)) == 0) {
            error = xcopyout(hist_buf,
                (char *)(uintptr_t)zc->zc_history,
                zc->zc_history_len);
      }

      spa_close(spa, FTAG);
      kmem_free(hist_buf, size);
      return (error);
}

static int
zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
{
      int error;

      if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value))
            return (error);

      return (0);
}

static int
zfs_ioc_obj_to_path(zfs_cmd_t *zc)
{
      objset_t *osp;
      int error;

      if ((error = dmu_objset_open(zc->zc_name, DMU_OST_ZFS,
          DS_MODE_USER | DS_MODE_READONLY, &osp)) != 0)
            return (error);
      error = zfs_obj_to_path(osp, zc->zc_obj, zc->zc_value,
          sizeof (zc->zc_value));
      dmu_objset_close(osp);

      return (error);
}

static int
zfs_ioc_vdev_add(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;
      nvlist_t *config, **l2cache, **spares;
      uint_t nl2cache = 0, nspares = 0;

      error = spa_open(zc->zc_name, &spa, FTAG);
      if (error != 0)
            return (error);

      error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
          zc->zc_iflags, &config);
      (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
          &l2cache, &nl2cache);

      (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
          &spares, &nspares);

      /*
       * A root pool with concatenated devices is not supported.
       * Thus, can not add a device to a root pool.
       *
       * Intent log device can not be added to a rootpool because
       * during mountroot, zil is replayed, a seperated log device
       * can not be accessed during the mountroot time.
       *
       * l2cache and spare devices are ok to be added to a rootpool.
       */
      if (spa->spa_bootfs != 0 && nl2cache == 0 && nspares == 0) {
            spa_close(spa, FTAG);
            return (EDOM);
      }

      if (error == 0) {
            error = spa_vdev_add(spa, config);
            nvlist_free(config);
      }
      spa_close(spa, FTAG);
      return (error);
}

static int
zfs_ioc_vdev_remove(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;

      error = spa_open(zc->zc_name, &spa, FTAG);
      if (error != 0)
            return (error);
      error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
      spa_close(spa, FTAG);
      return (error);
}

static int
zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;
      vdev_state_t newstate = VDEV_STATE_UNKNOWN;

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
            return (error);
      switch (zc->zc_cookie) {
      case VDEV_STATE_ONLINE:
            error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
            break;

      case VDEV_STATE_OFFLINE:
            error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
            break;

      case VDEV_STATE_FAULTED:
            error = vdev_fault(spa, zc->zc_guid);
            break;

      case VDEV_STATE_DEGRADED:
            error = vdev_degrade(spa, zc->zc_guid);
            break;

      default:
            error = EINVAL;
      }
      zc->zc_cookie = newstate;
      spa_close(spa, FTAG);
      return (error);
}

static int
zfs_ioc_vdev_attach(zfs_cmd_t *zc)
{
      spa_t *spa;
      int replacing = zc->zc_cookie;
      nvlist_t *config;
      int error;

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
            return (error);

      if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
          zc->zc_iflags, &config)) == 0) {
            error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
            nvlist_free(config);
      }

      spa_close(spa, FTAG);
      return (error);
}

static int
zfs_ioc_vdev_detach(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
            return (error);

      error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);

      spa_close(spa, FTAG);
      return (error);
}

static int
zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
{
      spa_t *spa;
      char *path = zc->zc_value;
      uint64_t guid = zc->zc_guid;
      int error;

      error = spa_open(zc->zc_name, &spa, FTAG);
      if (error != 0)
            return (error);

      error = spa_vdev_setpath(spa, guid, path);
      spa_close(spa, FTAG);
      return (error);
}

static int
zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
{
      spa_t *spa;
      char *fru = zc->zc_value;
      uint64_t guid = zc->zc_guid;
      int error;

      error = spa_open(zc->zc_name, &spa, FTAG);
      if (error != 0)
            return (error);

      error = spa_vdev_setfru(spa, guid, fru);
      spa_close(spa, FTAG);
      return (error);
}

/*
 * inputs:
 * zc_name        name of filesystem
 * zc_nvlist_dst_size   size of buffer for property nvlist
 *
 * outputs:
 * zc_objset_stats      stats
 * zc_nvlist_dst  property nvlist
 * zc_nvlist_dst_size   size of property nvlist
 */
static int
zfs_ioc_objset_stats(zfs_cmd_t *zc)
{
      objset_t *os = NULL;
      int error;
      nvlist_t *nv;

      if (error = dmu_objset_open(zc->zc_name,
          DMU_OST_ANY, DS_MODE_USER | DS_MODE_READONLY, &os))
            return (error);

      dmu_objset_fast_stat(os, &zc->zc_objset_stats);

      if (zc->zc_nvlist_dst != 0 &&
          (error = dsl_prop_get_all(os, &nv, FALSE)) == 0) {
            dmu_objset_stats(os, nv);
            /*
             * NB: zvol_get_stats() will read the objset contents,
             * which we aren't supposed to do with a
             * DS_MODE_USER hold, because it could be
             * inconsistent.  So this is a bit of a workaround...
             */
            if (!zc->zc_objset_stats.dds_inconsistent) {
                  if (dmu_objset_type(os) == DMU_OST_ZVOL)
                        VERIFY(zvol_get_stats(os, nv) == 0);
            }
            error = put_nvlist(zc, nv);
            nvlist_free(nv);
      }

      dmu_objset_close(os);
      return (error);
}

static int
nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
{
      uint64_t value;
      int error;

      /*
       * zfs_get_zplprop() will either find a value or give us
       * the default value (if there is one).
       */
      if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
            return (error);
      VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
      return (0);
}

/*
 * inputs:
 * zc_name        name of filesystem
 * zc_nvlist_dst_size   size of buffer for zpl property nvlist
 *
 * outputs:
 * zc_nvlist_dst  zpl property nvlist
 * zc_nvlist_dst_size   size of zpl property nvlist
 */
static int
zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
{
      objset_t *os;
      int err;

      if (err = dmu_objset_open(zc->zc_name,
          DMU_OST_ANY, DS_MODE_USER | DS_MODE_READONLY, &os))
            return (err);

      dmu_objset_fast_stat(os, &zc->zc_objset_stats);

      /*
       * NB: nvl_add_zplprop() will read the objset contents,
       * which we aren't supposed to do with a DS_MODE_USER
       * hold, because it could be inconsistent.
       */
      if (zc->zc_nvlist_dst != 0 &&
          !zc->zc_objset_stats.dds_inconsistent &&
          dmu_objset_type(os) == DMU_OST_ZFS) {
            nvlist_t *nv;

            VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
            if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
                (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
                (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
                (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
                  err = put_nvlist(zc, nv);
            nvlist_free(nv);
      } else {
            err = ENOENT;
      }
      dmu_objset_close(os);
      return (err);
}

static boolean_t
dataset_name_hidden(const char *name)
{
      /*
       * Skip over datasets that are not visible in this zone,
       * internal datasets (which have a $ in their name), and
       * temporary datasets (which have a % in their name).
       */
      if (strchr(name, '$') != NULL)
            return (B_TRUE);
      if (strchr(name, '%') != NULL)
            return (B_TRUE);
      if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
            return (B_TRUE);
      return (B_FALSE);
}

/*
 * inputs:
 * zc_name        name of filesystem
 * zc_cookie            zap cursor
 * zc_nvlist_dst_size   size of buffer for property nvlist
 *
 * outputs:
 * zc_name        name of next filesystem
 * zc_cookie            zap cursor
 * zc_objset_stats      stats
 * zc_nvlist_dst  property nvlist
 * zc_nvlist_dst_size   size of property nvlist
 */
static int
zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
{
      objset_t *os;
      int error;
      char *p;

      if (error = dmu_objset_open(zc->zc_name,
          DMU_OST_ANY, DS_MODE_USER | DS_MODE_READONLY, &os)) {
            if (error == ENOENT)
                  error = ESRCH;
            return (error);
      }

      p = strrchr(zc->zc_name, '/');
      if (p == NULL || p[1] != '\0')
            (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
      p = zc->zc_name + strlen(zc->zc_name);

      /*
       * Pre-fetch the datasets.  dmu_objset_prefetch() always returns 0
       * but is not declared void because its called by dmu_objset_find().
       */
      if (zc->zc_cookie == 0) {
            uint64_t cookie = 0;
            int len = sizeof (zc->zc_name) - (p - zc->zc_name);

            while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0)
                  (void) dmu_objset_prefetch(p, NULL);
      }

      do {
            error = dmu_dir_list_next(os,
                sizeof (zc->zc_name) - (p - zc->zc_name), p,
                NULL, &zc->zc_cookie);
            if (error == ENOENT)
                  error = ESRCH;
      } while (error == 0 && dataset_name_hidden(zc->zc_name));
      dmu_objset_close(os);

      if (error == 0)
            error = zfs_ioc_objset_stats(zc); /* fill in the stats */

      return (error);
}

/*
 * inputs:
 * zc_name        name of filesystem
 * zc_cookie            zap cursor
 * zc_nvlist_dst_size   size of buffer for property nvlist
 *
 * outputs:
 * zc_name        name of next snapshot
 * zc_objset_stats      stats
 * zc_nvlist_dst  property nvlist
 * zc_nvlist_dst_size   size of property nvlist
 */
static int
zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
{
      objset_t *os;
      int error;

      error = dmu_objset_open(zc->zc_name,
          DMU_OST_ANY, DS_MODE_USER | DS_MODE_READONLY, &os);
      if (error)
            return (error == ENOENT ? ESRCH : error);

      if (zc->zc_cookie == 0) {
            (void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch,
                NULL, DS_FIND_SNAPSHOTS);
      }
      /*
       * A dataset name of maximum length cannot have any snapshots,
       * so exit immediately.
       */
      if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
            dmu_objset_close(os);
            return (ESRCH);
      }

      error = dmu_snapshot_list_next(os,
          sizeof (zc->zc_name) - strlen(zc->zc_name),
          zc->zc_name + strlen(zc->zc_name), NULL, &zc->zc_cookie, NULL);
      dmu_objset_close(os);
      if (error == 0)
            error = zfs_ioc_objset_stats(zc); /* fill in the stats */
      else if (error == ENOENT)
            error = ESRCH;

      /* if we failed, undo the @ that we tacked on to zc_name */
      if (error)
            *strchr(zc->zc_name, '@') = '\0';
      return (error);
}

int
zfs_set_prop_nvlist(const char *name, nvlist_t *nvl)
{
      nvpair_t *elem;
      int error = 0;
      uint64_t intval;
      char *strval;
      nvlist_t *genericnvl;
      boolean_t issnap = (strchr(name, '@') != NULL);

      /*
       * First validate permission to set all of the properties
       */
      elem = NULL;
      while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
            const char *propname = nvpair_name(elem);
            zfs_prop_t prop = zfs_name_to_prop(propname);

            if (prop == ZPROP_INVAL) {
                  /*
                   * If this is a user-defined property, it must be a
                   * string, and there is no further validation to do.
                   */
                  if (zfs_prop_user(propname) &&
                      nvpair_type(elem) == DATA_TYPE_STRING) {
                        if (error = zfs_secpolicy_write_perms(name,
                            ZFS_DELEG_PERM_USERPROP, CRED()))
                              return (error);
                        continue;
                  }

                  if (!issnap && zfs_prop_userquota(propname) &&
                      nvpair_type(elem) == DATA_TYPE_UINT64_ARRAY) {
                        const char *perm;
                        const char *up = zfs_userquota_prop_prefixes
                            [ZFS_PROP_USERQUOTA];
                        if (strncmp(propname, up, strlen(up)) == 0)
                              perm = ZFS_DELEG_PERM_USERQUOTA;
                        else
                              perm = ZFS_DELEG_PERM_GROUPQUOTA;
                        if (error = zfs_secpolicy_write_perms(name,
                            perm, CRED()))
                              return (error);
                        continue;
                  }

                  return (EINVAL);
            }

            if (issnap)
                  return (EINVAL);

            if ((error = zfs_secpolicy_setprop(name, prop, CRED())) != 0)
                  return (error);

            /*
             * Check that this value is valid for this pool version
             */
            switch (prop) {
            case ZFS_PROP_COMPRESSION:
                  /*
                   * If the user specified gzip compression, make sure
                   * the SPA supports it. We ignore any errors here since
                   * we'll catch them later.
                   */
                  if (nvpair_type(elem) == DATA_TYPE_UINT64 &&
                      nvpair_value_uint64(elem, &intval) == 0) {
                        if (intval >= ZIO_COMPRESS_GZIP_1 &&
                            intval <= ZIO_COMPRESS_GZIP_9 &&
                            zfs_earlier_version(name,
                            SPA_VERSION_GZIP_COMPRESSION))
                              return (ENOTSUP);

                        /*
                         * If this is a bootable dataset then
                         * verify that the compression algorithm
                         * is supported for booting. We must return
                         * something other than ENOTSUP since it
                         * implies a downrev pool version.
                         */
                        if (zfs_is_bootfs(name) &&
                            !BOOTFS_COMPRESS_VALID(intval))
                              return (ERANGE);
                  }
                  break;

            case ZFS_PROP_COPIES:
                  if (zfs_earlier_version(name, SPA_VERSION_DITTO_BLOCKS))
                        return (ENOTSUP);
                  break;

            case ZFS_PROP_SHARESMB:
                  if (zpl_earlier_version(name, ZPL_VERSION_FUID))
                        return (ENOTSUP);
                  break;

            case ZFS_PROP_ACLINHERIT:
                  if (nvpair_type(elem) == DATA_TYPE_UINT64 &&
                      nvpair_value_uint64(elem, &intval) == 0)
                        if (intval == ZFS_ACL_PASSTHROUGH_X &&
                            zfs_earlier_version(name,
                            SPA_VERSION_PASSTHROUGH_X))
                              return (ENOTSUP);
            }
      }

      VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
      elem = NULL;
      while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
            const char *propname = nvpair_name(elem);
            zfs_prop_t prop = zfs_name_to_prop(propname);

            if (prop == ZPROP_INVAL) {
                  if (zfs_prop_userquota(propname)) {
                        uint64_t *valary;
                        unsigned int vallen;
                        const char *domain;
                        zfs_userquota_prop_t type;
                        uint64_t rid;
                        uint64_t quota;
                        zfsvfs_t *zfsvfs;

                        VERIFY(nvpair_value_uint64_array(elem,
                            &valary, &vallen) == 0);
                        VERIFY(vallen == 3);
                        type = valary[0];
                        rid = valary[1];
                        quota = valary[2];
                        domain = propname +
                            strlen(zfs_userquota_prop_prefixes[type]);

                        error = zfsvfs_hold(name, B_FALSE, FTAG,
                            &zfsvfs);
                        if (error == 0) {
                              error = zfs_set_userquota(zfsvfs,
                                  type, domain, rid, quota);
                              zfsvfs_rele(zfsvfs, FTAG);
                        }
                        if (error == 0)
                              continue;
                        else
                              goto out;
                  } else if (zfs_prop_user(propname)) {
                        VERIFY(nvpair_value_string(elem, &strval) == 0);
                        error = dsl_prop_set(name, propname, 1,
                            strlen(strval) + 1, strval);
                        if (error == 0)
                              continue;
                        else
                              goto out;
                  }
            }

            switch (prop) {
            case ZFS_PROP_QUOTA:
                  if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
                      (error = dsl_dir_set_quota(name, intval)) != 0)
                        goto out;
                  break;

            case ZFS_PROP_REFQUOTA:
                  if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
                      (error = dsl_dataset_set_quota(name, intval)) != 0)
                        goto out;
                  break;

            case ZFS_PROP_RESERVATION:
                  if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
                      (error = dsl_dir_set_reservation(name,
                      intval)) != 0)
                        goto out;
                  break;

            case ZFS_PROP_REFRESERVATION:
                  if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
                      (error = dsl_dataset_set_reservation(name,
                      intval)) != 0)
                        goto out;
                  break;

            case ZFS_PROP_VOLSIZE:
                  /* ZFSFUSE: ZVols not implemented */
                  return ENXIO;

            case ZFS_PROP_VOLBLOCKSIZE:
                  /* ZFSFUSE: ZVols not implemented */
                  return ENXIO;

            case ZFS_PROP_VERSION:
            {
                  zfsvfs_t *zfsvfs;

                  if ((error = nvpair_value_uint64(elem, &intval)) != 0)
                        goto out;
                  if ((error = zfsvfs_hold(name, B_FALSE, FTAG,
                      &zfsvfs)) != 0)
                        goto out;
                  error = zfs_set_version(zfsvfs, intval);
                  zfsvfs_rele(zfsvfs, FTAG);

                  if (error == 0 && intval >= ZPL_VERSION_USERSPACE) {
                        zfs_cmd_t zc = { 0 };
                        (void) strcpy(zc.zc_name, name);
                        (void) zfs_ioc_userspace_upgrade(&zc);
                  }                 
                  if (error)
                        goto out;
                  break;
            }

            default:
                  if (nvpair_type(elem) == DATA_TYPE_STRING) {
                        if (zfs_prop_get_type(prop) !=
                            PROP_TYPE_STRING) {
                              error = EINVAL;
                              goto out;
                        }
                  } else if (nvpair_type(elem) == DATA_TYPE_UINT64) {
                        const char *unused;

                        VERIFY(nvpair_value_uint64(elem, &intval) == 0);

                        switch (zfs_prop_get_type(prop)) {
                        case PROP_TYPE_NUMBER:
                              break;
                        case PROP_TYPE_STRING:
                              error = EINVAL;
                              goto out;
                        case PROP_TYPE_INDEX:
                              if (zfs_prop_index_to_string(prop,
                                  intval, &unused) != 0) {
                                    error = EINVAL;
                                    goto out;
                              }
                              break;
                        default:
                              cmn_err(CE_PANIC,
                                  "unknown property type");
                              break;
                        }
                  } else {
                        error = EINVAL;
                        goto out;
                  }
                  if ((error = nvlist_add_nvpair(genericnvl, elem)) != 0)
                        goto out;
            }
      }

      if (nvlist_next_nvpair(genericnvl, NULL) != NULL) {
            error = dsl_props_set(name, genericnvl);
      }
out:
      nvlist_free(genericnvl);
      return (error);
}

/*
 * Check that all the properties are valid user properties.
 */
static int
zfs_check_userprops(char *fsname, nvlist_t *nvl)
{
      nvpair_t *elem = NULL;
      int error = 0;

      while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
            const char *propname = nvpair_name(elem);
            char *valstr;

            if (!zfs_prop_user(propname) ||
                nvpair_type(elem) != DATA_TYPE_STRING)
                  return (EINVAL);

            if (error = zfs_secpolicy_write_perms(fsname,
                ZFS_DELEG_PERM_USERPROP, CRED()))
                  return (error);

            if (strlen(propname) >= ZAP_MAXNAMELEN)
                  return (ENAMETOOLONG);

            VERIFY(nvpair_value_string(elem, &valstr) == 0);
            if (strlen(valstr) >= ZAP_MAXVALUELEN)
                  return (E2BIG);
      }
      return (0);
}

/*
 * inputs:
 * zc_name        name of filesystem
 * zc_value       name of property to set
 * zc_nvlist_src{_size} nvlist of properties to apply
 * zc_cookie            clear existing local props?
 *
 * outputs:       none
 */
static int
zfs_ioc_set_prop(zfs_cmd_t *zc)
{
      nvlist_t *nvl;
      int error;

      if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &nvl)) != 0)
            return (error);

      if (zc->zc_cookie) {
            nvlist_t *origprops;
            objset_t *os;

            if (dmu_objset_open(zc->zc_name, DMU_OST_ANY,
                DS_MODE_USER | DS_MODE_READONLY, &os) == 0) {
                  if (dsl_prop_get_all(os, &origprops, TRUE) == 0) {
                        clear_props(zc->zc_name, origprops, nvl);
                        nvlist_free(origprops);
                  }
                  dmu_objset_close(os);
            }

      }

      error = zfs_set_prop_nvlist(zc->zc_name, nvl);

      nvlist_free(nvl);
      return (error);
}

/*
 * inputs:
 * zc_name        name of filesystem
 * zc_value       name of property to inherit
 *
 * outputs:       none
 */
static int
zfs_ioc_inherit_prop(zfs_cmd_t *zc)
{
      /* the property name has been validated by zfs_secpolicy_inherit() */
      return (dsl_prop_set(zc->zc_name, zc->zc_value, 0, 0, NULL));
}

static int
zfs_ioc_pool_set_props(zfs_cmd_t *zc)
{
      nvlist_t *props;
      spa_t *spa;
      int error;
      nvpair_t *elem;

      if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &props)))
            return (error);

      /*
       * If the only property is the configfile, then just do a spa_lookup()
       * to handle the faulted case.
       */
      elem = nvlist_next_nvpair(props, NULL);
      if (elem != NULL && strcmp(nvpair_name(elem),
          zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
          nvlist_next_nvpair(props, elem) == NULL) {
            mutex_enter(&spa_namespace_lock);
            if ((spa = spa_lookup(zc->zc_name)) != NULL) {
                  spa_configfile_set(spa, props, B_FALSE);
                  spa_config_sync(spa, B_FALSE, B_TRUE);
            }
            mutex_exit(&spa_namespace_lock);
            if (spa != NULL)
                  return (0);
      }

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
            nvlist_free(props);
            return (error);
      }

      error = spa_prop_set(spa, props);

      nvlist_free(props);
      spa_close(spa, FTAG);

      return (error);
}

static int
zfs_ioc_pool_get_props(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;
      nvlist_t *nvp = NULL;

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
            /*
             * If the pool is faulted, there may be properties we can still
             * get (such as altroot and cachefile), so attempt to get them
             * anyway.
             */
            mutex_enter(&spa_namespace_lock);
            if ((spa = spa_lookup(zc->zc_name)) != NULL)
                  error = spa_prop_get(spa, &nvp);
            mutex_exit(&spa_namespace_lock);
      } else {
            error = spa_prop_get(spa, &nvp);
            spa_close(spa, FTAG);
      }

      if (error == 0 && zc->zc_nvlist_dst != 0)
            error = put_nvlist(zc, nvp);
      else
            error = EFAULT;

      nvlist_free(nvp);
      return (error);
}

static int
zfs_ioc_iscsi_perm_check(zfs_cmd_t *zc)
{
      /* ZFS-FUSE: not supported */
      return ENOTSUP;
#if 0
      nvlist_t *nvp;
      int error;
      uint32_t uid;
      uint32_t gid;
      uint32_t *groups;
      uint_t group_cnt;
      cred_t      *usercred;

      if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &nvp)) != 0) {
            return (error);
      }

      if ((error = nvlist_lookup_uint32(nvp,
          ZFS_DELEG_PERM_UID, &uid)) != 0) {
            nvlist_free(nvp);
            return (EPERM);
      }

      if ((error = nvlist_lookup_uint32(nvp,
          ZFS_DELEG_PERM_GID, &gid)) != 0) {
            nvlist_free(nvp);
            return (EPERM);
      }

      if ((error = nvlist_lookup_uint32_array(nvp, ZFS_DELEG_PERM_GROUPS,
          &groups, &group_cnt)) != 0) {
            nvlist_free(nvp);
            return (EPERM);
      }
      usercred = cralloc();
      if ((crsetugid(usercred, uid, gid) != 0) ||
          (crsetgroups(usercred, group_cnt, (gid_t *)groups) != 0)) {
            nvlist_free(nvp);
            crfree(usercred);
            return (EPERM);
      }
      nvlist_free(nvp);
      error = dsl_deleg_access(zc->zc_name,
          zfs_prop_to_name(ZFS_PROP_SHAREISCSI), usercred);
      crfree(usercred);
      return (error);
#endif
}

/*
 * inputs:
 * zc_name        name of filesystem
 * zc_nvlist_src{_size} nvlist of delegated permissions
 * zc_perm_action allow/unallow flag
 *
 * outputs:       none
 */
static int
zfs_ioc_set_fsacl(zfs_cmd_t *zc)
{
      int error;
      nvlist_t *fsaclnv = NULL;

      if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &fsaclnv)) != 0)
            return (error);

      /*
       * Verify nvlist is constructed correctly
       */
      if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
            nvlist_free(fsaclnv);
            return (EINVAL);
      }

      /*
       * If we don't have PRIV_SYS_MOUNT, then validate
       * that user is allowed to hand out each permission in
       * the nvlist(s)
       */

      error = secpolicy_zfs(CRED());
      if (error) {
            if (zc->zc_perm_action == B_FALSE) {
                  error = dsl_deleg_can_allow(zc->zc_name,
                      fsaclnv, CRED());
            } else {
                  error = dsl_deleg_can_unallow(zc->zc_name,
                      fsaclnv, CRED());
            }
      }

      if (error == 0)
            error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);

      nvlist_free(fsaclnv);
      return (error);
}

/*
 * inputs:
 * zc_name        name of filesystem
 *
 * outputs:
 * zc_nvlist_src{_size} nvlist of delegated permissions
 */
static int
zfs_ioc_get_fsacl(zfs_cmd_t *zc)
{
      nvlist_t *nvp;
      int error;

      if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
            error = put_nvlist(zc, nvp);
            nvlist_free(nvp);
      }

      return (error);
}

/*
 * inputs:
 * zc_name        name of volume
 *
 * outputs:       none
 */
static int
zfs_ioc_create_minor(zfs_cmd_t *zc)
{
      /* ZFSFUSE TODO: implement ZVOLs */
      return ENXIO;
}

/*
 * inputs:
 * zc_name        name of volume
 *
 * outputs:       none
 */
static int
zfs_ioc_remove_minor(zfs_cmd_t *zc)
{
      /* ZFSFUSE TODO: implement ZVOLs */
      return ENXIO;
}

/*
 * Search the vfs list for a specified resource.  Returns a pointer to it
 * or NULL if no suitable entry is found. The caller of this routine
 * is responsible for releasing the returned vfs pointer.
 */
#if 0
static vfs_t *
zfs_get_vfs(const char *resource)
{
      struct vfs *vfsp;
      struct vfs *vfs_found = NULL;

      vfs_list_read_lock();
      vfsp = rootvfs;
      do {
            if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
                  VFS_HOLD(vfsp);
                  vfs_found = vfsp;
                  break;
            }
            vfsp = vfsp->vfs_next;
      } while (vfsp != rootvfs);
      vfs_list_unlock();
      return (vfs_found);
}
#endif

/* ARGSUSED */
static void
zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
{
      zfs_creat_t *zct = arg;

      zfs_create_fs(os, cr, zct->zct_zplprops, tx);
}

#define     ZFS_PROP_UNDEFINED      ((uint64_t)-1)

/*
 * inputs:
 * createprops          list of properties requested by creator
 * default_zplver zpl version to use if unspecified in createprops
 * fuids_ok       fuids allowed in this version of the spa?
 * os             parent objset pointer (NULL if root fs)
 *
 * outputs:
 * zplprops values for the zplprops we attach to the master node object
 * is_ci    true if requested file system will be purely case-insensitive
 *
 * Determine the settings for utf8only, normalization and
 * casesensitivity.  Specific values may have been requested by the
 * creator and/or we can inherit values from the parent dataset.  If
 * the file system is of too early a vintage, a creator can not
 * request settings for these properties, even if the requested
 * setting is the default value.  We don't actually want to create dsl
 * properties for these, so remove them from the source nvlist after
 * processing.
 */
static int
zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
    boolean_t fuids_ok, nvlist_t *createprops, nvlist_t *zplprops,
    boolean_t *is_ci)
{
      uint64_t sense = ZFS_PROP_UNDEFINED;
      uint64_t norm = ZFS_PROP_UNDEFINED;
      uint64_t u8 = ZFS_PROP_UNDEFINED;

      ASSERT(zplprops != NULL);

      /*
       * Pull out creator prop choices, if any.
       */
      if (createprops) {
            (void) nvlist_lookup_uint64(createprops,
                zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
            (void) nvlist_lookup_uint64(createprops,
                zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
            (void) nvlist_remove_all(createprops,
                zfs_prop_to_name(ZFS_PROP_NORMALIZE));
            (void) nvlist_lookup_uint64(createprops,
                zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
            (void) nvlist_remove_all(createprops,
                zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
            (void) nvlist_lookup_uint64(createprops,
                zfs_prop_to_name(ZFS_PROP_CASE), &sense);
            (void) nvlist_remove_all(createprops,
                zfs_prop_to_name(ZFS_PROP_CASE));
      }

      /*
       * If the zpl version requested is whacky or the file system
       * or pool is version is too "young" to support normalization
       * and the creator tried to set a value for one of the props,
       * error out.
       */
      if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
          (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
          (zplver < ZPL_VERSION_NORMALIZATION &&
          (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
          sense != ZFS_PROP_UNDEFINED)))
            return (ENOTSUP);

      /*
       * Put the version in the zplprops
       */
      VERIFY(nvlist_add_uint64(zplprops,
          zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);

      if (norm == ZFS_PROP_UNDEFINED)
            VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
      VERIFY(nvlist_add_uint64(zplprops,
          zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);

      /*
       * If we're normalizing, names must always be valid UTF-8 strings.
       */
      if (norm)
            u8 = 1;
      if (u8 == ZFS_PROP_UNDEFINED)
            VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
      VERIFY(nvlist_add_uint64(zplprops,
          zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);

      if (sense == ZFS_PROP_UNDEFINED)
            VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
      VERIFY(nvlist_add_uint64(zplprops,
          zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);

      if (is_ci)
            *is_ci = (sense == ZFS_CASE_INSENSITIVE);

      return (0);
}

static int
zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
    nvlist_t *zplprops, boolean_t *is_ci)
{
      boolean_t fuids_ok = B_TRUE;
      uint64_t zplver = ZPL_VERSION;
      objset_t *os = NULL;
      char parentname[MAXNAMELEN];
      char *cp;
      int error;

      (void) strlcpy(parentname, dataset, sizeof (parentname));
      cp = strrchr(parentname, '/');
      ASSERT(cp != NULL);
      cp[0] = '\0';

      if (zfs_earlier_version(dataset, SPA_VERSION_USERSPACE))
            zplver = ZPL_VERSION_USERSPACE - 1;
      if (zfs_earlier_version(dataset, SPA_VERSION_FUID)) {
            zplver = ZPL_VERSION_FUID - 1;
            fuids_ok = B_FALSE;
      }

      /*
       * Open parent object set so we can inherit zplprop values.
       */
      if ((error = dmu_objset_open(parentname, DMU_OST_ANY,
          DS_MODE_USER | DS_MODE_READONLY, &os)) != 0)
            return (error);

      error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, createprops,
          zplprops, is_ci);
      dmu_objset_close(os);
      return (error);
}

static int
zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
    nvlist_t *zplprops, boolean_t *is_ci)
{
      boolean_t fuids_ok = B_TRUE;
      uint64_t zplver = ZPL_VERSION;
      int error;

      if (spa_vers < SPA_VERSION_FUID) {
            zplver = ZPL_VERSION_FUID - 1;
            fuids_ok = B_FALSE;
      }

      error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, createprops,
          zplprops, is_ci);
      return (error);
}

/*
 * inputs:
 * zc_objset_type type of objset to create (fs vs zvol)
 * zc_name        name of new objset
 * zc_value       name of snapshot to clone from (may be empty)
 * zc_nvlist_src{_size} nvlist of properties to apply
 *
 * outputs: none
 */
static int
zfs_ioc_create(zfs_cmd_t *zc)
{
      objset_t *clone;
      int error = 0;
      zfs_creat_t zct;
      nvlist_t *nvprops = NULL;
      void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
      dmu_objset_type_t type = zc->zc_objset_type;

      switch (type) {

      case DMU_OST_ZFS:
            cbfunc = zfs_create_cb;
            break;
      case DMU_OST_ZVOL:
            /* ZFSFUSE: TODO Implement ZVOLs */
            /*cbfunc = zvol_create_cb;*/
            return ENOSYS;
      default:
            cbfunc = NULL;
            break;
      }
      if (strchr(zc->zc_name, '@') ||
          strchr(zc->zc_name, '%'))
            return (EINVAL);

      if (zc->zc_nvlist_src != (uint64_t)(uintptr_t) NULL &&
          (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &nvprops)) != 0)
            return (error);

      zct.zct_zplprops = NULL;
      zct.zct_props = nvprops;

      if (zc->zc_value[0] != '\0') {
            /*
             * We're creating a clone of an existing snapshot.
             */
            zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
            if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) {
                  nvlist_free(nvprops);
                  return (EINVAL);
            }

            error = dmu_objset_open(zc->zc_value, type,
                DS_MODE_USER | DS_MODE_READONLY, &clone);
            if (error) {
                  nvlist_free(nvprops);
                  return (error);
            }

            error = dmu_objset_create(zc->zc_name, type, clone, 0,
                NULL, NULL);
            if (error) {
                  dmu_objset_close(clone);
                  nvlist_free(nvprops);
                  return (error);
            }
            dmu_objset_close(clone);
      } else {
            boolean_t is_insensitive = B_FALSE;

            if (cbfunc == NULL) {
                  nvlist_free(nvprops);
                  return (EINVAL);
            }

            if (type == DMU_OST_ZVOL) {
                  uint64_t volsize, volblocksize;

                  if (nvprops == NULL ||
                      nvlist_lookup_uint64(nvprops,
                      zfs_prop_to_name(ZFS_PROP_VOLSIZE),
                      &volsize) != 0) {
                        nvlist_free(nvprops);
                        return (EINVAL);
                  }

                  if ((error = nvlist_lookup_uint64(nvprops,
                      zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
                      &volblocksize)) != 0 && error != ENOENT) {
                        nvlist_free(nvprops);
                        return (EINVAL);
                  }

                  if (error != 0)
                        volblocksize = zfs_prop_default_numeric(
                            ZFS_PROP_VOLBLOCKSIZE);

/* ZFSFUSE: TODO Implement ZVOLs */
#if 0
                  if ((error = zvol_check_volblocksize(
                      volblocksize)) != 0 ||
                      (error = zvol_check_volsize(volsize,
                      volblocksize)) != 0) {
                        nvlist_free(nvprops);
                        return (error);
                  }
#endif
            } else if (type == DMU_OST_ZFS) {
                  int error;

                  /*
                   * We have to have normalization and
                   * case-folding flags correct when we do the
                   * file system creation, so go figure them out
                   * now.
                   */
                  VERIFY(nvlist_alloc(&zct.zct_zplprops,
                      NV_UNIQUE_NAME, KM_SLEEP) == 0);
                  error = zfs_fill_zplprops(zc->zc_name, nvprops,
                      zct.zct_zplprops, &is_insensitive);
                  if (error != 0) {
                        nvlist_free(nvprops);
                        nvlist_free(zct.zct_zplprops);
                        return (error);
                  }
            }
            error = dmu_objset_create(zc->zc_name, type, NULL,
                is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
            nvlist_free(zct.zct_zplprops);
      }

      /*
       * It would be nice to do this atomically.
       */
      if (error == 0) {
            if ((error = zfs_set_prop_nvlist(zc->zc_name, nvprops)) != 0)
                  (void) dmu_objset_destroy(zc->zc_name);
      }
      nvlist_free(nvprops);
      return (error);
}

/*
 * inputs:
 * zc_name  name of filesystem
 * zc_value short name of snapshot
 * zc_cookie      recursive flag
 * zc_nvlist_src[_size] property list
 *
 * outputs: none
 */
static int
zfs_ioc_snapshot(zfs_cmd_t *zc)
{
      nvlist_t *nvprops = NULL;
      int error;
      boolean_t recursive = zc->zc_cookie;

      if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
            return (EINVAL);

      if (zc->zc_nvlist_src != 0 &&
          (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &nvprops)) != 0)
            return (error);

      error = zfs_check_userprops(zc->zc_name, nvprops);
      if (error)
            goto out;

      if (nvprops != NULL && nvlist_next_nvpair(nvprops, NULL) != NULL &&
          zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) {
            error = ENOTSUP;
            goto out;
      }

      error = dmu_objset_snapshot(zc->zc_name, zc->zc_value,
          nvprops, recursive);

out:
      nvlist_free(nvprops);
      return (error);
}

int
zfs_unmount_snap(char *name, void *arg)
{
      /* ZFSFUSE: TODO */
#if 0
      vfs_t *vfsp = NULL;

      if (arg) {
            char *snapname = arg;
            int len = strlen(name) + strlen(snapname) + 2;
            char *buf = kmem_alloc(len, KM_SLEEP);

            (void) strcpy(buf, name);
            (void) strcat(buf, "@");
            (void) strcat(buf, snapname);
            vfsp = zfs_get_vfs(buf);
            kmem_free(buf, len);
      } else if (strchr(name, '@')) {
            vfsp = zfs_get_vfs(name);
      }

      if (vfsp) {
            /*
             * Always force the unmount for snapshots.
             */
            int flag = MS_FORCE;
            int err;

            if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) {
                  VFS_RELE(vfsp);
                  return (err);
            }
            VFS_RELE(vfsp);
            if ((err = dounmount(vfsp, flag, kcred)) != 0)
                  return (err);
      }
#endif
      return (0);
}

/*
 * inputs:
 * zc_name  name of filesystem
 * zc_value short name of snapshot
 *
 * outputs: none
 */
static int
zfs_ioc_destroy_snaps(zfs_cmd_t *zc)
{
      int err;

      if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
            return (EINVAL);
      err = dmu_objset_find(zc->zc_name,
          zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN);
      if (err)
            return (err);
      return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value));
}

/*
 * inputs:
 * zc_name        name of dataset to destroy
 * zc_objset_type type of objset
 *
 * outputs:       none
 */
static int
zfs_ioc_destroy(zfs_cmd_t *zc)
{
      if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) {
            int err = zfs_unmount_snap(zc->zc_name, NULL);
            if (err)
                  return (err);
      }

      return (dmu_objset_destroy(zc->zc_name));
}

/*
 * inputs:
 * zc_name  name of dataset to rollback (to most recent snapshot)
 *
 * outputs: none
 */
static int
zfs_ioc_rollback(zfs_cmd_t *zc)
{
      objset_t *os;
      int error;
      zfsvfs_t *zfsvfs = NULL;

      /*
       * Get the zfsvfs for the receiving objset. There
       * won't be one if we're operating on a zvol, if the
       * objset doesn't exist yet, or is not mounted.
       */
      error = dmu_objset_open(zc->zc_name, DMU_OST_ANY, DS_MODE_USER, &os);
      if (error)
            return (error);

      if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
            int mode;

            error = zfs_suspend_fs(zfsvfs, NULL, &mode);
            if (error == 0) {
                  int resume_err;

                  error = dmu_objset_rollback(os);
                  resume_err = zfs_resume_fs(zfsvfs, zc->zc_name, mode);
                  error = error ? error : resume_err;
            } else {
                  dmu_objset_close(os);
            }
            VFS_RELE(zfsvfs->z_vfs);
      } else {
            error = dmu_objset_rollback(os);
      }
      /* Note, the dmu_objset_rollback() releases the objset for us. */

      return (error);
}

/*
 * inputs:
 * zc_name  old name of dataset
 * zc_value new name of dataset
 * zc_cookie      recursive flag (only valid for snapshots)
 *
 * outputs: none
 */
static int
zfs_ioc_rename(zfs_cmd_t *zc)
{
      boolean_t recursive = zc->zc_cookie & 1;

      zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
      if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
          strchr(zc->zc_value, '%'))
            return (EINVAL);

      /*
       * Unmount snapshot unless we're doing a recursive rename,
       * in which case the dataset code figures out which snapshots
       * to unmount.
       */
      if (!recursive && strchr(zc->zc_name, '@') != NULL &&
          zc->zc_objset_type == DMU_OST_ZFS) {
            int err = zfs_unmount_snap(zc->zc_name, NULL);
            if (err)
                  return (err);
      }
      return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive));
}

static void
clear_props(char *dataset, nvlist_t *props, nvlist_t *newprops)
{
      zfs_cmd_t *zc;
      nvpair_t *prop;

      if (props == NULL)
            return;
      zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
      (void) strcpy(zc->zc_name, dataset);
      for (prop = nvlist_next_nvpair(props, NULL); prop;
          prop = nvlist_next_nvpair(props, prop)) {
            if (newprops != NULL &&
                nvlist_exists(newprops, nvpair_name(prop)))
                  continue;
            (void) strcpy(zc->zc_value, nvpair_name(prop));
            if (zfs_secpolicy_inherit(zc, CRED()) == 0)
                  (void) zfs_ioc_inherit_prop(zc);
      }
      kmem_free(zc, sizeof (zfs_cmd_t));
}

/*
 * inputs:
 * zc_name        name of containing filesystem
 * zc_nvlist_src{_size} nvlist of properties to apply
 * zc_value       name of snapshot to create
 * zc_string            name of clone origin (if DRR_FLAG_CLONE)
 * zc_cookie            file descriptor to recv from
 * zc_begin_record      the BEGIN record of the stream (not byteswapped)
 * zc_guid        force flag
 *
 * outputs:
 * zc_cookie            number of bytes read
 */
static int
zfs_ioc_recv(zfs_cmd_t *zc)
{
      file_t *fp;
      objset_t *os;
      dmu_recv_cookie_t drc;
      zfsvfs_t *zfsvfs = NULL;
      boolean_t force = (boolean_t)zc->zc_guid;
      int error, fd;
      offset_t off;
      nvlist_t *props = NULL;
      nvlist_t *origprops = NULL;
      objset_t *origin = NULL;
      char *tosnap;
      char tofs[ZFS_MAXNAMELEN];

      if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
          strchr(zc->zc_value, '@') == NULL ||
          strchr(zc->zc_value, '%'))
            return (EINVAL);

      (void) strcpy(tofs, zc->zc_value);
      tosnap = strchr(tofs, '@');
      *tosnap = '\0';
      tosnap++;

      if (zc->zc_nvlist_src != 0 &&
          (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
          zc->zc_iflags, &props)) != 0)
            return (error);

      fd = zc->zc_cookie;
      fp = getf(fd);
      if (fp == NULL) {
            nvlist_free(props);
            return (EBADF);
      }

      if (getzfsvfs(tofs, &zfsvfs) == 0) {
            if (!mutex_tryenter(&zfsvfs->z_online_recv_lock)) {
                  VFS_RELE(zfsvfs->z_vfs);
                  zfsvfs = NULL;
                  error = EBUSY;
                  goto out;
            }
            /*
             * If new properties are supplied, they are to completely
             * replace the existing ones, so stash away the existing ones.
             */
            if (props)
                  (void) dsl_prop_get_all(zfsvfs->z_os, &origprops, TRUE);
      } else if (props && dmu_objset_open(tofs, DMU_OST_ANY,
          DS_MODE_USER | DS_MODE_READONLY, &os) == 0) {
            /*
             * Get the props even if there was no zfsvfs (zvol or
             * unmounted zpl).
             */
            (void) dsl_prop_get_all(os, &origprops, TRUE);

            dmu_objset_close(os);
      }

      if (zc->zc_string[0]) {
            error = dmu_objset_open(zc->zc_string, DMU_OST_ANY,
                DS_MODE_USER | DS_MODE_READONLY, &origin);
            if (error)
                  goto out;
      }

      error = dmu_recv_begin(tofs, tosnap, &zc->zc_begin_record,
          force, origin, zfsvfs != NULL, &drc);
      if (origin)
            dmu_objset_close(origin);
      if (error)
            goto out;

      /*
       * Reset properties.  We do this before we receive the stream
       * so that the properties are applied to the new data.
       */
      if (props) {
            clear_props(tofs, origprops, props);
            /*
             * XXX - Note, this is all-or-nothing; should be best-effort.
             */
            (void) zfs_set_prop_nvlist(tofs, props);
      }

      off = fp->f_offset;
      error = dmu_recv_stream(&drc, fp->f_vnode, &off);

      if (error == 0 && zfsvfs) {
            char *osname;
            int mode;

            /* online recv */
            osname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
            error = zfs_suspend_fs(zfsvfs, osname, &mode);
            if (error == 0) {
                  int resume_err;

                  error = dmu_recv_end(&drc);
                  resume_err = zfs_resume_fs(zfsvfs, osname, mode);
                  error = error ? error : resume_err;
            } else {
                  dmu_recv_abort_cleanup(&drc);
            }
            kmem_free(osname, MAXNAMELEN);
      } else if (error == 0) {
            error = dmu_recv_end(&drc);
      }

      zc->zc_cookie = off - fp->f_offset;
      if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
            fp->f_offset = off;

      /*
       * On error, restore the original props.
       */
      if (error && props) {
            clear_props(tofs, props, NULL);
            (void) zfs_set_prop_nvlist(tofs, origprops);
      }
out:
      if (zfsvfs) {
            mutex_exit(&zfsvfs->z_online_recv_lock);
            VFS_RELE(zfsvfs->z_vfs);
      }
      nvlist_free(props);
      nvlist_free(origprops);
      releasef(fd);
      return (error);
}

/*
 * inputs:
 * zc_name  name of snapshot to send
 * zc_value short name of incremental fromsnap (may be empty)
 * zc_cookie      file descriptor to send stream to
 * zc_obj   fromorigin flag (mutually exclusive with zc_value)
 *
 * outputs: none
 */
static int
zfs_ioc_send(zfs_cmd_t *zc)
{
      objset_t *fromsnap = NULL;
      objset_t *tosnap;
      file_t *fp;
      int error;
      offset_t off;

      error = dmu_objset_open(zc->zc_name, DMU_OST_ANY,
          DS_MODE_USER | DS_MODE_READONLY, &tosnap);
      if (error)
            return (error);

      if (zc->zc_value[0] != '\0') {
            char *buf;
            char *cp;

            buf = kmem_alloc(MAXPATHLEN, KM_SLEEP);
            (void) strncpy(buf, zc->zc_name, MAXPATHLEN);
            cp = strchr(buf, '@');
            if (cp)
                  *(cp+1) = 0;
            (void) strncat(buf, zc->zc_value, MAXPATHLEN);
            error = dmu_objset_open(buf, DMU_OST_ANY,
                DS_MODE_USER | DS_MODE_READONLY, &fromsnap);
            kmem_free(buf, MAXPATHLEN);
            if (error) {
                  dmu_objset_close(tosnap);
                  return (error);
            }
      }

      fp = getf(zc->zc_cookie);
      if (fp == NULL) {
            dmu_objset_close(tosnap);
            if (fromsnap)
                  dmu_objset_close(fromsnap);
            return (EBADF);
      }

      off = fp->f_offset;
      error = dmu_sendbackup(tosnap, fromsnap, zc->zc_obj, fp->f_vnode, &off);

      if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
            fp->f_offset = off;
      releasef(zc->zc_cookie);
      if (fromsnap)
            dmu_objset_close(fromsnap);
      dmu_objset_close(tosnap);
      return (error);
}

static int
zfs_ioc_inject_fault(zfs_cmd_t *zc)
{
      int id, error;

      error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
          &zc->zc_inject_record);

      if (error == 0)
            zc->zc_guid = (uint64_t)id;

      return (error);
}

static int
zfs_ioc_clear_fault(zfs_cmd_t *zc)
{
      return (zio_clear_fault((int)zc->zc_guid));
}

static int
zfs_ioc_inject_list_next(zfs_cmd_t *zc)
{
      int id = (int)zc->zc_guid;
      int error;

      error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
          &zc->zc_inject_record);

      zc->zc_guid = id;

      return (error);
}

static int
zfs_ioc_error_log(zfs_cmd_t *zc)
{
      spa_t *spa;
      int error;
      size_t count = (size_t)zc->zc_nvlist_dst_size;

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
            return (error);

      error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
          &count);
      if (error == 0)
            zc->zc_nvlist_dst_size = count;
      else
            zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);

      spa_close(spa, FTAG);

      return (error);
}

static int
zfs_ioc_clear(zfs_cmd_t *zc)
{
      spa_t *spa;
      vdev_t *vd;
      int error;

      /*
       * On zpool clear we also fix up missing slogs
       */
      mutex_enter(&spa_namespace_lock);
      spa = spa_lookup(zc->zc_name);
      if (spa == NULL) {
            mutex_exit(&spa_namespace_lock);
            return (EIO);
      }
      if (spa->spa_log_state == SPA_LOG_MISSING) {
            /* we need to let spa_open/spa_load clear the chains */
            spa->spa_log_state = SPA_LOG_CLEAR;
      }
      mutex_exit(&spa_namespace_lock);

      if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
            return (error);

      spa_vdev_state_enter(spa);

      if (zc->zc_guid == 0) {
            vd = NULL;
      } else {
            vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
            if (vd == NULL) {
                  (void) spa_vdev_state_exit(spa, NULL, ENODEV);
                  spa_close(spa, FTAG);
                  return (ENODEV);
            }
      }

      vdev_clear(spa, vd);

      (void) spa_vdev_state_exit(spa, NULL, 0);

      /*
       * Resume any suspended I/Os.
       */
      if (zio_resume(spa) != 0)
            error = EIO;

      spa_close(spa, FTAG);

      return (error);
}

/*
 * inputs:
 * zc_name  name of filesystem
 * zc_value name of origin snapshot
 *
 * outputs: none
 */
static int
zfs_ioc_promote(zfs_cmd_t *zc)
{
      char *cp;

      /*
       * We don't need to unmount *all* the origin fs's snapshots, but
       * it's easier.
       */
      cp = strchr(zc->zc_value, '@');
      if (cp)
            *cp = '\0';
      (void) dmu_objset_find(zc->zc_value,
          zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS);
      return (dsl_dataset_promote(zc->zc_name));
}

/*
 * Retrieve a single {user|group}{used|quota}@... property.
 *
 * inputs:
 * zc_name  name of filesystem
 * zc_objset_type zfs_userquota_prop_t
 * zc_value domain name (eg. "S-1-234-567-89")
 * zc_guid  RID/UID/GID
 *
 * outputs:
 * zc_cookie      property value
 */
static int
zfs_ioc_userspace_one(zfs_cmd_t *zc)
{
      zfsvfs_t *zfsvfs;
      int error;

      if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
            return (EINVAL);

      error = zfsvfs_hold(zc->zc_name, B_TRUE, FTAG, &zfsvfs);
      if (error)
            return (error);

      error = zfs_userspace_one(zfsvfs,
          zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
      zfsvfs_rele(zfsvfs, FTAG);

      return (error);
}

/*
 * inputs:
 * zc_name        name of filesystem
 * zc_cookie            zap cursor
 * zc_objset_type zfs_userquota_prop_t
 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
 *
 * outputs:
 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
 * zc_cookie      zap cursor
 */
static int
zfs_ioc_userspace_many(zfs_cmd_t *zc)
{
      zfsvfs_t *zfsvfs;
      int error;

      error = zfsvfs_hold(zc->zc_name, B_TRUE, FTAG, &zfsvfs);
      if (error)
            return (error);

      int bufsize = zc->zc_nvlist_dst_size;
      void *buf = kmem_alloc(bufsize, KM_SLEEP);

      error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
          buf, &zc->zc_nvlist_dst_size);

      if (error == 0) {
            error = xcopyout(buf,
                (void *)(uintptr_t)zc->zc_nvlist_dst,
                zc->zc_nvlist_dst_size);
      }
      kmem_free(buf, bufsize);
      zfsvfs_rele(zfsvfs, FTAG);

      return (error);
}

/*
 * inputs:
 * zc_name        name of filesystem
 *
 * outputs:
 * none
 */
static int
zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
{
      objset_t *os;
      int error;
      zfsvfs_t *zfsvfs;

      if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
            if (!dmu_objset_userused_enabled(zfsvfs->z_os->os)) {
                  /*
                   * If userused is not enabled, it may be because the
                   * objset needs to be closed & reopened (to grow the
                   * objset_phys_t).  Suspend/resume the fs will do that.
                   */
                  int mode;
                  error = zfs_suspend_fs(zfsvfs, NULL, &mode);
                  if (error == 0) {
                        error = zfs_resume_fs(zfsvfs,
                            zc->zc_name, mode);
                  }
            }
            if (error == 0)
                  error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
            VFS_RELE(zfsvfs->z_vfs);
      } else {
            error = dmu_objset_open(zc->zc_name, DMU_OST_ANY,
                DS_MODE_USER, &os);
            if (error)
                  return (error);

            error = dmu_objset_userspace_upgrade(os);
            dmu_objset_close(os);
      }

      return (error);
}

/*
 * We don't want to have a hard dependency
 * against some special symbols in sharefs
 * nfs, and smbsrv.  Determine them if needed when
 * the first file system is shared.
 * Neither sharefs, nfs or smbsrv are unloadable modules.
 */
#if 0
int (*znfsexport_fs)(void *arg);
int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
int (*zsmbexport_fs)(void *arg, boolean_t add_share);

int zfs_nfsshare_inited;
int zfs_smbshare_inited;

ddi_modhandle_t nfs_mod;
ddi_modhandle_t sharefs_mod;
ddi_modhandle_t smbsrv_mod;
#endif

kmutex_t zfs_share_lock;

static int
zfs_init_sharefs()
{
      int error;

      ASSERT(MUTEX_HELD(&zfs_share_lock));

/* ZFS-FUSE: not supported */
#if 0
      /* Both NFS and SMB shares also require sharetab support. */
      if (sharefs_mod == NULL && ((sharefs_mod =
          ddi_modopen("fs/sharefs",
          KRTLD_MODE_FIRST, &error)) == NULL)) {
            return (ENOSYS);
      }
      if (zshare_fs == NULL && ((zshare_fs =
          (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
          ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
            return (ENOSYS);
      }
#endif
      return (0);
}

static int
zfs_ioc_share(zfs_cmd_t *zc)
{
      /* ZFS-FUSE: not supported */
      return ENOTSUP;
#if 0
      int error;
      int opcode;

      switch (zc->zc_share.z_sharetype) {
      case ZFS_SHARE_NFS:
      case ZFS_UNSHARE_NFS:
            if (zfs_nfsshare_inited == 0) {
                  mutex_enter(&zfs_share_lock);
                  if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
                      KRTLD_MODE_FIRST, &error)) == NULL)) {
                        mutex_exit(&zfs_share_lock);
                        return (ENOSYS);
                  }
                  if (znfsexport_fs == NULL &&
                      ((znfsexport_fs = (int (*)(void *))
                      ddi_modsym(nfs_mod,
                      "nfs_export", &error)) == NULL)) {
                        mutex_exit(&zfs_share_lock);
                        return (ENOSYS);
                  }
                  error = zfs_init_sharefs();
                  if (error) {
                        mutex_exit(&zfs_share_lock);
                        return (ENOSYS);
                  }
                  zfs_nfsshare_inited = 1;
                  mutex_exit(&zfs_share_lock);
            }
            break;
      case ZFS_SHARE_SMB:
      case ZFS_UNSHARE_SMB:
            if (zfs_smbshare_inited == 0) {
                  mutex_enter(&zfs_share_lock);
                  if (smbsrv_mod == NULL && ((smbsrv_mod =
                      ddi_modopen("drv/smbsrv",
                      KRTLD_MODE_FIRST, &error)) == NULL)) {
                        mutex_exit(&zfs_share_lock);
                        return (ENOSYS);
                  }
                  if (zsmbexport_fs == NULL && ((zsmbexport_fs =
                      (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
                      "smb_server_share", &error)) == NULL)) {
                        mutex_exit(&zfs_share_lock);
                        return (ENOSYS);
                  }
                  error = zfs_init_sharefs();
                  if (error) {
                        mutex_exit(&zfs_share_lock);
                        return (ENOSYS);
                  }
                  zfs_smbshare_inited = 1;
                  mutex_exit(&zfs_share_lock);
            }
            break;
      default:
            return (EINVAL);
      }

      switch (zc->zc_share.z_sharetype) {
      case ZFS_SHARE_NFS:
      case ZFS_UNSHARE_NFS:
            if (error =
                znfsexport_fs((void *)
                (uintptr_t)zc->zc_share.z_exportdata))
                  return (error);
            break;
      case ZFS_SHARE_SMB:
      case ZFS_UNSHARE_SMB:
            if (error = zsmbexport_fs((void *)
                (uintptr_t)zc->zc_share.z_exportdata,
                zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
                B_TRUE: B_FALSE)) {
                  return (error);
            }
            break;
      }

      opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
          zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
          SHAREFS_ADD : SHAREFS_REMOVE;

      /*
       * Add or remove share from sharetab
       */
      error = zshare_fs(opcode,
          (void *)(uintptr_t)zc->zc_share.z_sharedata,
          zc->zc_share.z_sharemax);

      return (error);
#endif
}

ace_t full_access[] = {
      {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
};

/*
 * Remove all ACL files in shares dir
 */
static int
zfs_smb_acl_purge(znode_t *dzp)
{
      zap_cursor_t      zc;
      zap_attribute_t   zap;
      zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
      int error;

      for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
          (error = zap_cursor_retrieve(&zc, &zap)) == 0;
          zap_cursor_advance(&zc)) {
            if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
                NULL, 0)) != 0)
                  break;
      }
      zap_cursor_fini(&zc);
      return (error);
}

static int
zfs_ioc_smb_acl(zfs_cmd_t *zc)
{
        /* ZFS-FUSE: not supported */
        return ENOTSUP;
#if 0
      vnode_t *vp;
      znode_t *dzp;
      vnode_t *resourcevp = NULL;
      znode_t *sharedir;
      zfsvfs_t *zfsvfs;
      nvlist_t *nvlist;
      char *src, *target;
      vattr_t vattr;
      vsecattr_t vsec;
      int error = 0;

      if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
          NO_FOLLOW, NULL, &vp)) != 0)
            return (error);

      /* Now make sure mntpnt and dataset are ZFS */

      if (vp->v_vfsp->vfs_fstype != zfsfstype ||
          (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
          zc->zc_name) != 0)) {
            VN_RELE(vp);
            return (EINVAL);
      }

      dzp = VTOZ(vp);
      zfsvfs = dzp->z_zfsvfs;
      ZFS_ENTER(zfsvfs);

      /*
       * Create share dir if its missing.
       */
      mutex_enter(&zfsvfs->z_lock);
      if (zfsvfs->z_shares_dir == 0) {
            dmu_tx_t *tx;

            tx = dmu_tx_create(zfsvfs->z_os);
            dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
                ZFS_SHARES_DIR);
            dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
            error = dmu_tx_assign(tx, TXG_WAIT);
            if (error) {
                  dmu_tx_abort(tx);
            } else {
                  error = zfs_create_share_dir(zfsvfs, tx);
                  dmu_tx_commit(tx);
            }
            if (error) {
                  mutex_exit(&zfsvfs->z_lock);
                  VN_RELE(vp);
                  ZFS_EXIT(zfsvfs);
                  return (error);
            }
      }
      mutex_exit(&zfsvfs->z_lock);

      ASSERT(zfsvfs->z_shares_dir);
      if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
            VN_RELE(vp);
            ZFS_EXIT(zfsvfs);
            return (error);
      }

      switch (zc->zc_cookie) {
      case ZFS_SMB_ACL_ADD:
            vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
            vattr.va_type = VREG;
            vattr.va_mode = S_IFREG|0777;
            vattr.va_uid = 0;
            vattr.va_gid = 0;

            vsec.vsa_mask = VSA_ACE;
            vsec.vsa_aclentp = &full_access;
            vsec.vsa_aclentsz = sizeof (full_access);
            vsec.vsa_aclcnt = 1;

            error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
                &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
            if (resourcevp)
                  VN_RELE(resourcevp);
            break;

      case ZFS_SMB_ACL_REMOVE:
            error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
                NULL, 0);
            break;

      case ZFS_SMB_ACL_RENAME:
            if ((error = get_nvlist(zc->zc_nvlist_src,
                zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
                  VN_RELE(vp);
                  ZFS_EXIT(zfsvfs);
                  return (error);
            }
            if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
                nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
                &target)) {
                  VN_RELE(vp);
                  VN_RELE(ZTOV(sharedir));
                  ZFS_EXIT(zfsvfs);
                  return (error);
            }
            error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
                kcred, NULL, 0);
            nvlist_free(nvlist);
            break;

      case ZFS_SMB_ACL_PURGE:
            error = zfs_smb_acl_purge(sharedir);
            break;

      default:
            error = EINVAL;
            break;
      }

      VN_RELE(vp);
      VN_RELE(ZTOV(sharedir));

      ZFS_EXIT(zfsvfs);

      return (error);
#endif
}

/*
 * pool create, destroy, and export don't log the history as part of
 * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export
 * do the logging of those commands.
 */
static zfs_ioc_vec_t zfs_ioc_vec[] = {
      { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_FALSE },
      { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_pool_scrub, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_FALSE },
      { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE,
          B_TRUE },
      { zfs_ioc_vdev_setfru,  zfs_secpolicy_config, POOL_NAME, B_FALSE,
          B_TRUE },
      { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE, B_TRUE },
      { zfs_ioc_create_minor, zfs_secpolicy_minor, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_remove_minor, zfs_secpolicy_minor, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE, B_TRUE },
      { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE,
          B_TRUE},
      { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_rename, zfs_secpolicy_rename,   DATASET_NAME, B_TRUE, B_TRUE },
      { zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE, B_TRUE },
      { zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE, B_FALSE },
      { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE, B_FALSE },
      { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_destroy_snaps, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_config, POOL_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_obj_to_path, zfs_secpolicy_config, NO_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_iscsi_perm_check, zfs_secpolicy_iscsi, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE, B_FALSE },
      { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE,
          B_TRUE },
      { zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE,
          B_FALSE },
      { zfs_ioc_userspace_one, zfs_secpolicy_userspace_one,
          DATASET_NAME, B_FALSE, B_FALSE },
      { zfs_ioc_userspace_many, zfs_secpolicy_userspace_many,
          DATASET_NAME, B_FALSE, B_FALSE },
      { zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
          DATASET_NAME, B_FALSE, B_TRUE },
};

int
pool_status_check(const char *name, zfs_ioc_namecheck_t type)
{
      spa_t *spa;
      int error;

      ASSERT(type == POOL_NAME || type == DATASET_NAME);

      error = spa_open(name, &spa, FTAG);
      if (error == 0) {
            if (spa_suspended(spa))
                  error = EAGAIN;
            spa_close(spa, FTAG);
      }
      return (error);
}

int
zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
{
      zfs_cmd_t *zc;
      uint_t vec;
      int error, rc;

/* zfs-fuse: not implemented */
#if 0
      if (getminor(dev) != 0)
            return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
#endif

      vec = cmd - ZFS_IOC;
      /*ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));*/

      if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
            return (EINVAL);

      zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);

      error = xcopyin((void *)arg, zc, sizeof (zfs_cmd_t));

      if (error == 0)
            error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr);

      /*
       * Ensure that all pool/dataset names are valid before we pass down to
       * the lower layers.
       */
      if (error == 0) {
            zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
            zc->zc_iflags = flag & FKIOCTL;
            switch (zfs_ioc_vec[vec].zvec_namecheck) {
            case POOL_NAME:
                  if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
                        error = EINVAL;
                  if (zfs_ioc_vec[vec].zvec_pool_check)
                        error = pool_status_check(zc->zc_name,
                            zfs_ioc_vec[vec].zvec_namecheck);
                  break;

            case DATASET_NAME:
                  if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
                        error = EINVAL;
                  if (zfs_ioc_vec[vec].zvec_pool_check)
                        error = pool_status_check(zc->zc_name,
                            zfs_ioc_vec[vec].zvec_namecheck);
                  break;

            case NO_NAME:
                  break;
            }
      }

      if (error == 0)
            error = zfs_ioc_vec[vec].zvec_func(zc);

      rc = xcopyout(zc, (void *)arg, sizeof (zfs_cmd_t));
      if (error == 0) {
            error = rc;
            if (zfs_ioc_vec[vec].zvec_his_log)
                  zfs_log_history(zc);
      }

      kmem_free(zc, sizeof (zfs_cmd_t));
      return (error);
}

#if 0
static int
zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
      if (cmd != DDI_ATTACH)
            return (DDI_FAILURE);

      if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
          DDI_PSEUDO, 0) == DDI_FAILURE)
            return (DDI_FAILURE);

      zfs_dip = dip;

      ddi_report_dev(dip);

      return (DDI_SUCCESS);
}

static int
zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
      if (spa_busy() || zfs_busy() || zvol_busy())
            return (DDI_FAILURE);

      if (cmd != DDI_DETACH)
            return (DDI_FAILURE);

      zfs_dip = NULL;

      ddi_prop_remove_all(dip);
      ddi_remove_minor_node(dip, NULL);

      return (DDI_SUCCESS);
}

/*ARGSUSED*/
static int
zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
{
      switch (infocmd) {
      case DDI_INFO_DEVT2DEVINFO:
            *result = zfs_dip;
            return (DDI_SUCCESS);

      case DDI_INFO_DEVT2INSTANCE:
            *result = (void *)0;
            return (DDI_SUCCESS);
      }

      return (DDI_FAILURE);
}

/*
 * OK, so this is a little weird.
 *
 * /dev/zfs is the control node, i.e. minor 0.
 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
 *
 * /dev/zfs has basically nothing to do except serve up ioctls,
 * so most of the standard driver entry points are in zvol.c.
 */
static struct cb_ops zfs_cb_ops = {
      zvol_open,  /* open */
      zvol_close, /* close */
      zvol_strategy,    /* strategy */
      nodev,            /* print */
      zvol_dump,  /* dump */
      zvol_read,  /* read */
      zvol_write, /* write */
      zfsdev_ioctl,     /* ioctl */
      nodev,            /* devmap */
      nodev,            /* mmap */
      nodev,            /* segmap */
      nochpoll,   /* poll */
      ddi_prop_op,      /* prop_op */
      NULL,       /* streamtab */
      D_NEW | D_MP | D_64BIT,       /* Driver compatibility flag */
      CB_REV,           /* version */
      nodev,            /* async read */
      nodev,            /* async write */
};

static struct dev_ops zfs_dev_ops = {
      DEVO_REV,   /* version */
      0,          /* refcnt */
      zfs_info,   /* info */
      nulldev,    /* identify */
      nulldev,    /* probe */
      zfs_attach, /* attach */
      zfs_detach, /* detach */
      nodev,            /* reset */
      &zfs_cb_ops,      /* driver operations */
      NULL,       /* no bus operations */
      NULL,       /* power */
      ddi_quiesce_not_needed, /* quiesce */
};

static struct modldrv zfs_modldrv = {
      &mod_driverops,
      "ZFS storage pool",
      &zfs_dev_ops
};

static struct modlinkage modlinkage = {
      MODREV_1,
      (void *)&zfs_modlfs,
      (void *)&zfs_modldrv,
      NULL
};
#endif

uint_t zfs_fsyncer_key;
extern uint_t rrw_tsd_key;

int
zfs_ioctl_init(void)
{
      spa_init(FREAD | FWRITE);

      zfs_init();

      /* zfs-fuse: not implemented */
      /*zvol_init();*/

#if 0
      if ((error = mod_install(&modlinkage)) != 0) {
            zvol_fini();
            zfs_fini();
            spa_fini();
            return (error);
      }
#endif

      tsd_create(&zfs_fsyncer_key, NULL);
      tsd_create(&rrw_tsd_key, NULL);

#if 0
      error = ldi_ident_from_mod(&modlinkage, &zfs_li);
      ASSERT(error == 0);
#endif

      mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);

      return (0);
}

int
zfs_ioctl_fini(void)
{
      int error = 0;

      if (spa_busy() || zfs_busy() || /*zvol_busy() ||*/ zio_injection_enabled)
            return (EBUSY);

#if 0
      if ((error = mod_remove(&modlinkage)) != 0)
            return (error);
#endif

      /* zfs-fuse: not implemented */
      /*zvol_fini();*/

      zfs_fini();
      spa_fini();

#if 0
      if (zfs_nfsshare_inited)
            (void) ddi_modclose(nfs_mod);
      if (zfs_smbshare_inited)
            (void) ddi_modclose(smbsrv_mod);
      if (zfs_nfsshare_inited || zfs_smbshare_inited)
            (void) ddi_modclose(sharefs_mod);
#endif

      tsd_destroy(&zfs_fsyncer_key);
#if 0
      ldi_ident_release(zfs_li);
#endif
      zfs_li = NULL;
      mutex_destroy(&zfs_share_lock);

      return (error);
}

#if 0
int
_info(struct modinfo *modinfop)
{
      return (mod_info(&modlinkage, modinfop));
}
#endif

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