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61f218b090
freebsd-nq/module/zfs/zfs_ioctl.c
Brian Behlendorf 61f218b090 Fix send/recv 'dataset is busy' errors 
This commit fixes a regression which was accidentally introduced by
the Linux 2.6.39 compatibility chanages.  As part of these changes
instead of holding an active reference on the namepsace (which is
no longer posible) a reference is taken on the super block.  This
reference ensures the super block remains valid while it is in use.

To handle the unlikely race condition of the filesystem being
unmounted concurrently with the start of a 'zfs send/recv' the
code was updated to only take the super block reference when there
was an existing reference.  This indicates that the filesystem is
active and in use.

Unfortunately, in the 'zfs recv' case this is not the case.  The
newly created dataset will not have a super block without an
active reference which results in the 'dataset is busy' error.

The most straight forward fix for this is to simply update the
code to always take the reference even when it's zero.  This
may expose us to very very unlikely concurrent umount/send/recv
case but the consequences of that are minor.

Closes #319
2011-07-15 16:37:19 -07:00

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/*
* 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/errno.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_vfsops.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/priv_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_dir.h>
#include <sys/zfs_onexit.h>
#include <sys/zvol.h>
#include <sys/dsl_scan.h>
#include <sharefs/share.h>
#include <sys/dmu_objset.h>
#include <sys/fm/util.h>
#include <linux/miscdevice.h>
#include "zfs_namecheck.h"
#include "zfs_prop.h"
#include "zfs_deleg.h"
#include "zfs_comutil.h"
kmutex_t zfsdev_state_lock;
list_t zfsdev_state_list;
extern void zfs_init(void);
extern void zfs_fini(void);
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 enum {
POOL_CHECK_NONE = 1 << 0,
POOL_CHECK_SUSPENDED = 1 << 1,
POOL_CHECK_READONLY = 1 << 2
} zfs_ioc_poolcheck_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;
zfs_ioc_poolcheck_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 int zfs_check_settable(const char *name, nvpair_t *property,
cred_t *cr);
static int zfs_check_clearable(char *dataset, nvlist_t *props,
nvlist_t **errors);
static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
boolean_t *);
int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, 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[512];
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);
/*
* 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 | KM_NODEBUG);
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)
{
objset_t *os;
if (dmu_objset_hold(name, FTAG, &os) == 0) {
boolean_t ret;
ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
dmu_objset_rele(os, FTAG);
return (ret);
}
return (B_FALSE);
}
/*
* 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_hold(name, FTAG, &os) == 0) {
uint64_t zplversion;
if (dmu_objset_type(os) != DMU_OST_ZFS) {
dmu_objset_rele(os, FTAG);
return (B_TRUE);
}
/* XXX reading from non-owned objset */
if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
rc = zplversion < version;
dmu_objset_rele(os, FTAG);
}
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_impl(const char *dataset, uint64_t zoned, cred_t *cr)
{
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 (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);
}
static int
zfs_dozonecheck(const char *dataset, cred_t *cr)
{
uint64_t zoned;
if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
return (ENOENT);
return (zfs_dozonecheck_impl(dataset, zoned, cr));
}
static int
zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
{
uint64_t zoned;
rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
if (dsl_prop_get_ds(ds, "zoned", 8, 1, &zoned, NULL)) {
rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
return (ENOENT);
}
rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
return (zfs_dozonecheck_impl(dataset, zoned, cr));
}
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);
}
int
zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
const char *perm, cred_t *cr)
{
int error;
error = zfs_dozonecheck_ds(name, ds, cr);
if (error == 0) {
error = secpolicy_zfs(cr);
if (error)
error = dsl_deleg_access_impl(ds, perm, cr);
}
return (error);
}
/*
* Policy for setting the security label property.
*
* Returns 0 for success, non-zero for access and other errors.
*/
static int
zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
{
#ifdef HAVE_MLSLABEL
char ds_hexsl[MAXNAMELEN];
bslabel_t ds_sl, new_sl;
boolean_t new_default = FALSE;
uint64_t zoned;
int needed_priv = -1;
int error;
/* First get the existing dataset label. */
error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
1, sizeof (ds_hexsl), &ds_hexsl, NULL);
if (error)
return (EPERM);
if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
new_default = TRUE;
/* The label must be translatable */
if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
return (EINVAL);
/*
* In a non-global zone, disallow attempts to set a label that
* doesn't match that of the zone; otherwise no other checks
* are needed.
*/
if (!INGLOBALZONE(curproc)) {
if (new_default || !blequal(&new_sl, CR_SL(CRED())))
return (EPERM);
return (0);
}
/*
* For global-zone datasets (i.e., those whose zoned property is
* "off", verify that the specified new label is valid for the
* global zone.
*/
if (dsl_prop_get_integer(name,
zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
return (EPERM);
if (!zoned) {
if (zfs_check_global_label(name, strval) != 0)
return (EPERM);
}
/*
* If the existing dataset label is nondefault, check if the
* dataset is mounted (label cannot be changed while mounted).
* Get the zfs_sb_t; if there isn't one, then the dataset isn't
* mounted (or isn't a dataset, doesn't exist, ...).
*/
if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
objset_t *os;
static char *setsl_tag = "setsl_tag";
/*
* Try to own the dataset; abort if there is any error,
* (e.g., already mounted, in use, or other error).
*/
error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
setsl_tag, &os);
if (error)
return (EPERM);
dmu_objset_disown(os, setsl_tag);
if (new_default) {
needed_priv = PRIV_FILE_DOWNGRADE_SL;
goto out_check;
}
if (hexstr_to_label(strval, &new_sl) != 0)
return (EPERM);
if (blstrictdom(&ds_sl, &new_sl))
needed_priv = PRIV_FILE_DOWNGRADE_SL;
else if (blstrictdom(&new_sl, &ds_sl))
needed_priv = PRIV_FILE_UPGRADE_SL;
} else {
/* dataset currently has a default label */
if (!new_default)
needed_priv = PRIV_FILE_UPGRADE_SL;
}
out_check:
if (needed_priv != -1)
return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
return (0);
#else
return ENOTSUP;
#endif /* HAVE_MLSLABEL */
}
static int
zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
cred_t *cr)
{
char *strval;
/*
* Check permissions for special properties.
*/
switch (prop) {
default:
break;
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(dsname, "zoned", &zoned,
setpoint))
return (EPERM);
if (!zoned || strlen(dsname) <= strlen(setpoint))
return (EPERM);
}
break;
case ZFS_PROP_MLSLABEL:
if (!is_system_labeled())
return (EPERM);
if (nvpair_value_string(propval, &strval) == 0) {
int err;
err = zfs_set_slabel_policy(dsname, strval, CRED());
if (err != 0)
return (err);
}
break;
}
return (zfs_secpolicy_write_perms(dsname, 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)
{
return (zfs_secpolicy_write_perms(zc->zc_name,
ZFS_DELEG_PERM_ROLLBACK, cr));
}
int
zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr)
{
spa_t *spa;
dsl_pool_t *dp;
dsl_dataset_t *ds;
char *cp;
int error;
/*
* Generate the current snapshot name from the given objsetid, then
* use that name for the secpolicy/zone checks.
*/
cp = strchr(zc->zc_name, '@');
if (cp == NULL)
return (EINVAL);
error = spa_open(zc->zc_name, &spa, FTAG);
if (error)
return (error);
dp = spa_get_dsl(spa);
rw_enter(&dp->dp_config_rwlock, RW_READER);
error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
rw_exit(&dp->dp_config_rwlock);
spa_close(spa, FTAG);
if (error)
return (error);
dsl_dataset_name(ds, zc->zc_name);
error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
ZFS_DELEG_PERM_SEND, cr);
dsl_dataset_rele(ds, FTAG);
return (error);
}
#ifdef HAVE_SMB_SHARE
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 /* HAVE_SMB_SHARE */
int
zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr)
{
#ifdef HAVE_SMB_SHARE
if (!INGLOBALZONE(curproc))
return (EPERM);
if (secpolicy_nfs(cr) == 0) {
return (0);
} else {
return (zfs_secpolicy_deleg_share(zc, cr));
}
#else
return (ENOTSUP);
#endif /* HAVE_SMB_SHARE */
}
int
zfs_secpolicy_smb_acl(zfs_cmd_t *zc, cred_t *cr)
{
#ifdef HAVE_SMB_SHARE
if (!INGLOBALZONE(curproc))
return (EPERM);
if (secpolicy_smb(cr) == 0) {
return (0);
} else {
return (zfs_secpolicy_deleg_share(zc, cr));
}
#else
return (ENOTSUP);
#endif /* HAVE_SMB_SHARE */
}
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));
}
/*
* Destroying snapshots with delegated permissions requires
* descendent mount and destroy permissions.
* Reassemble the full filesystem@snap name so dsl_deleg_access()
* can do the correct permission check.
*
* Since this routine is used when doing a recursive destroy of snapshots
* and destroying snapshots requires descendent permissions, a successfull
* check of the top level snapshot applies to snapshots of all descendent
* datasets as well.
*/
static int
zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, cred_t *cr)
{
int error;
char *dsname;
dsname = kmem_asprintf("%s@%s", zc->zc_name, zc->zc_value);
error = zfs_secpolicy_destroy_perms(dsname, cr);
strfree(dsname);
return (error);
}
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_hold(zc->zc_name, FTAG, &clone);
if (error == 0) {
dsl_dataset_t *pclone = NULL;
dsl_dir_t *dd;
dd = clone->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_rele(clone, FTAG);
return (error);
}
error = zfs_secpolicy_write_perms(zc->zc_name,
ZFS_DELEG_PERM_MOUNT, cr);
dsl_dataset_name(pclone, parentname);
dmu_objset_rele(clone, FTAG);
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)
{
return (zfs_secpolicy_write_perms(name,
ZFS_DELEG_PERM_SNAPSHOT, cr));
}
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);
}
/*
* 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);
}
/*
* Policy for object to name lookups.
*/
/* ARGSUSED */
static int
zfs_secpolicy_diff(zfs_cmd_t *zc, cred_t *cr)
{
int error;
if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
return (0);
error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
return (error);
}
/*
* 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 {
return (zfs_secpolicy_setprop(zc->zc_name, prop,
NULL, 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,
NULL, cr));
}
static int
zfs_secpolicy_hold(zfs_cmd_t *zc, cred_t *cr)
{
return (zfs_secpolicy_write_perms(zc->zc_name,
ZFS_DELEG_PERM_HOLD, cr));
}
static int
zfs_secpolicy_release(zfs_cmd_t *zc, cred_t *cr)
{
return (zfs_secpolicy_write_perms(zc->zc_name,
ZFS_DELEG_PERM_RELEASE, cr));
}
/*
* Policy for allowing temporary snapshots to be taken or released
*/
static int
zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, cred_t *cr)
{
/*
* A temporary snapshot is the same as a snapshot,
* hold, destroy and release all rolled into one.
* Delegated diff alone is sufficient that we allow this.
*/
int error;
if ((error = zfs_secpolicy_write_perms(zc->zc_name,
ZFS_DELEG_PERM_DIFF, cr)) == 0)
return (0);
error = zfs_secpolicy_snapshot(zc, cr);
if (!error)
error = zfs_secpolicy_hold(zc, cr);
if (!error)
error = zfs_secpolicy_release(zc, cr);
if (!error)
error = zfs_secpolicy_destroy(zc, cr);
return (error);
}
/*
* 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 | KM_NODEBUG);
if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
iflag)) != 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
fit_error_list(zfs_cmd_t *zc, nvlist_t **errors)
{
size_t size;
VERIFY(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0);
if (size > zc->zc_nvlist_dst_size) {
nvpair_t *more_errors;
int n = 0;
if (zc->zc_nvlist_dst_size < 1024)
return (ENOMEM);
VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, 0) == 0);
more_errors = nvlist_prev_nvpair(*errors, NULL);
do {
nvpair_t *pair = nvlist_prev_nvpair(*errors,
more_errors);
VERIFY(nvlist_remove_nvpair(*errors, pair) == 0);
n++;
VERIFY(nvlist_size(*errors, &size,
NV_ENCODE_NATIVE) == 0);
} while (size > zc->zc_nvlist_dst_size);
VERIFY(nvlist_remove_nvpair(*errors, more_errors) == 0);
VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, n) == 0);
ASSERT(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0);
ASSERT(size <= zc->zc_nvlist_dst_size);
}
return (0);
}
static int
put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
{
char *packed = NULL;
int error = 0;
size_t size;
VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0);
if (size > zc->zc_nvlist_dst_size) {
error = ENOMEM;
} else {
packed = kmem_alloc(size, KM_SLEEP | KM_NODEBUG);
VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE,
KM_SLEEP) == 0);
if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
size, zc->zc_iflags) != 0)
error = EFAULT;
kmem_free(packed, size);
}
zc->zc_nvlist_dst_size = size;
return (error);
}
static int
get_zfs_sb(const char *dsname, zfs_sb_t **zsbp)
{
objset_t *os;
int error;
error = dmu_objset_hold(dsname, FTAG, &os);
if (error)
return (error);
if (dmu_objset_type(os) != DMU_OST_ZFS) {
dmu_objset_rele(os, FTAG);
return (EINVAL);
}
mutex_enter(&os->os_user_ptr_lock);
*zsbp = dmu_objset_get_user(os);
if (*zsbp && (*zsbp)->z_sb) {
atomic_inc(&((*zsbp)->z_sb->s_active));
} else {
error = ESRCH;
}
mutex_exit(&os->os_user_ptr_lock);
dmu_objset_rele(os, FTAG);
return (error);
}
/*
* Find a zfs_sb_t for a mounted filesystem, or create our own, in which
* case its z_sb will be NULL, and it will be opened as the owner.
*/
static int
zfs_sb_hold(const char *name, void *tag, zfs_sb_t **zsbp, boolean_t writer)
{
int error = 0;
if (get_zfs_sb(name, zsbp) != 0)
error = zfs_sb_create(name, zsbp);
if (error == 0) {
rrw_enter(&(*zsbp)->z_teardown_lock, (writer) ? RW_WRITER :
RW_READER, tag);
if ((*zsbp)->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(&(*zsbp)->z_teardown_lock, tag);
return (EBUSY);
}
}
return (error);
}
static void
zfs_sb_rele(zfs_sb_t *zsb, void *tag)
{
rrw_exit(&zsb->z_teardown_lock, tag);
if (zsb->z_sb) {
deactivate_super(zsb->z_sb);
} else {
dmu_objset_disown(zsb->z_os, zsb);
zfs_sb_free(zsb);
}
}
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,
ZPROP_SRC_LOCAL, rootprops, NULL)) != 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);
if (error == 0)
zvol_remove_minors(zc->zc_name);
return (error);
}
static int
zfs_ioc_pool_import(zfs_cmd_t *zc)
{
nvlist_t *config, *props = NULL;
uint64_t guid;
int error;
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
error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
if (zc->zc_nvlist_dst != 0) {
int err;
if ((err = put_nvlist(zc, config)) != 0)
error = err;
}
if (error == 0)
zvol_create_minors(zc->zc_name);
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);
if (error == 0)
zvol_remove_minors(zc->zc_name);
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);
}
/*
* inputs:
* zc_name name of the pool
* zc_cookie scan func (pool_scan_func_t)
*/
static int
zfs_ioc_pool_scan(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 == POOL_SCAN_NONE)
error = spa_scan_stop(spa);
else
error = spa_scan(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 = vmem_alloc(size, KM_SLEEP);
if ((error = spa_history_get(spa, &zc->zc_history_offset,
&zc->zc_history_len, hist_buf)) == 0) {
error = ddi_copyout(hist_buf,
(void *)(uintptr_t)zc->zc_history,
zc->zc_history_len, zc->zc_iflags);
}
spa_close(spa, FTAG);
vmem_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);
}
/*
* inputs:
* zc_name name of filesystem
* zc_obj object to find
*
* outputs:
* zc_value name of object
*/
static int
zfs_ioc_obj_to_path(zfs_cmd_t *zc)
{
objset_t *os;
int error;
/* XXX reading from objset not owned */
if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
return (error);
if (dmu_objset_type(os) != DMU_OST_ZFS) {
dmu_objset_rele(os, FTAG);
return (EINVAL);
}
error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
sizeof (zc->zc_value));
dmu_objset_rele(os, FTAG);
return (error);
}
/*
* inputs:
* zc_name name of filesystem
* zc_obj object to find
*
* outputs:
* zc_stat stats on object
* zc_value path to object
*/
static int
zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
{
objset_t *os;
int error;
/* XXX reading from objset not owned */
if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
return (error);
if (dmu_objset_type(os) != DMU_OST_ZFS) {
dmu_objset_rele(os, FTAG);
return (EINVAL);
}
error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
sizeof (zc->zc_value));
dmu_objset_rele(os, FTAG);
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_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
nvlist_free(config);
spa_close(spa, FTAG);
return (EDOM);
}
if (error == 0) {
error = spa_vdev_add(spa, config);
nvlist_free(config);
}
spa_close(spa, FTAG);
return (error);
}
/*
* inputs:
* zc_name name of the pool
* zc_nvlist_conf nvlist of devices to remove
* zc_cookie to stop the remove?
*/
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:
if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
zc->zc_obj != VDEV_AUX_EXTERNAL)
zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
break;
case VDEV_STATE_DEGRADED:
if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
zc->zc_obj != VDEV_AUX_EXTERNAL)
zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
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_split(zfs_cmd_t *zc)
{
spa_t *spa;
nvlist_t *config, *props = NULL;
int error;
boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
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))) {
spa_close(spa, FTAG);
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))) {
spa_close(spa, FTAG);
nvlist_free(config);
return (error);
}
error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
spa_close(spa, FTAG);
nvlist_free(config);
nvlist_free(props);
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);
}
static int
zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
{
int error = 0;
nvlist_t *nv;
dmu_objset_fast_stat(os, &zc->zc_objset_stats);
if (zc->zc_nvlist_dst != 0 &&
(error = dsl_prop_get_all(os, &nv)) == 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...
* XXX reading with out owning
*/
if (!zc->zc_objset_stats.dds_inconsistent) {
if (dmu_objset_type(os) == DMU_OST_ZVOL)
error = zvol_get_stats(os, nv);
}
if (error == 0)
error = put_nvlist(zc, nv);
nvlist_free(nv);
}
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;
if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)))
return (error);
error = zfs_ioc_objset_stats_impl(zc, os);
dmu_objset_rele(os, FTAG);
return (error);
}
/*
* inputs:
* zc_name name of filesystem
* zc_nvlist_dst_size size of buffer for property nvlist
*
* outputs:
* zc_nvlist_dst received property nvlist
* zc_nvlist_dst_size size of received property nvlist
*
* Gets received properties (distinct from local properties on or after
* SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
* local property values.
*/
static int
zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
{
objset_t *os = NULL;
int error;
nvlist_t *nv;
if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)))
return (error);
/*
* Without this check, we would return local property values if the
* caller has not already received properties on or after
* SPA_VERSION_RECVD_PROPS.
*/
if (!dsl_prop_get_hasrecvd(os)) {
dmu_objset_rele(os, FTAG);
return (ENOTSUP);
}
if (zc->zc_nvlist_dst != 0 &&
(error = dsl_prop_get_received(os, &nv)) == 0) {
error = put_nvlist(zc, nv);
nvlist_free(nv);
}
dmu_objset_rele(os, FTAG);
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;
/* XXX reading without owning */
if ((err = dmu_objset_hold(zc->zc_name, FTAG, &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_rele(os, FTAG);
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, '$') != NULL)
return (B_TRUE);
if (strchr(name, '%') != NULL)
return (B_TRUE);
if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
return (B_TRUE);
return (B_FALSE);
}
/*
* inputs:
* zc_name name of filesystem
* zc_cookie zap cursor
* zc_nvlist_dst_size size of buffer for property nvlist
*
* outputs:
* zc_name name of next filesystem
* zc_cookie zap cursor
* zc_objset_stats stats
* zc_nvlist_dst property nvlist
* zc_nvlist_dst_size size of property nvlist
*/
static int
zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
{
objset_t *os;
int error;
char *p;
size_t orig_len = strlen(zc->zc_name);
top:
if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os))) {
if (error == ENOENT)
error = ESRCH;
return (error);
}
p = strrchr(zc->zc_name, '/');
if (p == NULL || p[1] != '\0')
(void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
p = zc->zc_name + strlen(zc->zc_name);
/*
* Pre-fetch the datasets. dmu_objset_prefetch() always returns 0
* but is not declared void because its called by dmu_objset_find().
*/
if (zc->zc_cookie == 0) {
uint64_t cookie = 0;
int len = sizeof (zc->zc_name) - (p - zc->zc_name);
while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0)
(void) dmu_objset_prefetch(p, NULL);
}
do {
error = dmu_dir_list_next(os,
sizeof (zc->zc_name) - (p - zc->zc_name), p,
NULL, &zc->zc_cookie);
if (error == ENOENT)
error = ESRCH;
} while (error == 0 && dataset_name_hidden(zc->zc_name) &&
!(zc->zc_iflags & FKIOCTL));
dmu_objset_rele(os, FTAG);
/*
* If it's an internal dataset (ie. with a '$' in its name),
* don't try to get stats for it, otherwise we'll return ENOENT.
*/
if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
error = zfs_ioc_objset_stats(zc); /* fill in the stats */
if (error == ENOENT) {
/* We lost a race with destroy, get the next one. */
zc->zc_name[orig_len] = '\0';
goto top;
}
}
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;
top:
if (zc->zc_cookie == 0)
(void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch,
NULL, DS_FIND_SNAPSHOTS);
error = dmu_objset_hold(zc->zc_name, FTAG, &os);
if (error)
return (error == ENOENT ? ESRCH : error);
/*
* 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_rele(os, FTAG);
return (ESRCH);
}
error = dmu_snapshot_list_next(os,
sizeof (zc->zc_name) - strlen(zc->zc_name),
zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
NULL);
if (error == 0) {
dsl_dataset_t *ds;
dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
/*
* Since we probably don't have a hold on this snapshot,
* it's possible that the objsetid could have been destroyed
* and reused for a new objset. It's OK if this happens during
* a zfs send operation, since the new createtxg will be
* beyond the range we're interested in.
*/
rw_enter(&dp->dp_config_rwlock, RW_READER);
error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
rw_exit(&dp->dp_config_rwlock);
if (error) {
if (error == ENOENT) {
/* Racing with destroy, get the next one. */
*strchr(zc->zc_name, '@') = '\0';
dmu_objset_rele(os, FTAG);
goto top;
}
} else {
objset_t *ossnap;
error = dmu_objset_from_ds(ds, &ossnap);
if (error == 0)
error = zfs_ioc_objset_stats_impl(zc, ossnap);
dsl_dataset_rele(ds, FTAG);
}
} else if (error == ENOENT) {
error = ESRCH;
}
dmu_objset_rele(os, FTAG);
/* if we failed, undo the @ that we tacked on to zc_name */
if (error)
*strchr(zc->zc_name, '@') = '\0';
return (error);
}
static int
zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
{
const char *propname = nvpair_name(pair);
uint64_t *valary;
unsigned int vallen;
const char *domain;
char *dash;
zfs_userquota_prop_t type;
uint64_t rid;
uint64_t quota;
zfs_sb_t *zsb;
int err;
if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
nvlist_t *attrs;
VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
&pair) != 0)
return (EINVAL);
}
/*
* A correctly constructed propname is encoded as
* userquota@<rid>-<domain>.
*/
if ((dash = strchr(propname, '-')) == NULL ||
nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
vallen != 3)
return (EINVAL);
domain = dash + 1;
type = valary[0];
rid = valary[1];
quota = valary[2];
err = zfs_sb_hold(dsname, FTAG, &zsb, B_FALSE);
if (err == 0) {
err = zfs_set_userquota(zsb, type, domain, rid, quota);
zfs_sb_rele(zsb, FTAG);
}
return (err);
}
/*
* If the named property is one that has a special function to set its value,
* return 0 on success and a positive error code on failure; otherwise if it is
* not one of the special properties handled by this function, return -1.
*
* XXX: It would be better for callers of the property interface if we handled
* these special cases in dsl_prop.c (in the dsl layer).
*/
static int
zfs_prop_set_special(const char *dsname, zprop_source_t source,
nvpair_t *pair)
{
const char *propname = nvpair_name(pair);
zfs_prop_t prop = zfs_name_to_prop(propname);
uint64_t intval;
int err;
if (prop == ZPROP_INVAL) {
if (zfs_prop_userquota(propname))
return (zfs_prop_set_userquota(dsname, pair));
return (-1);
}
if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
nvlist_t *attrs;
VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
&pair) == 0);
}
if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
return (-1);
VERIFY(0 == nvpair_value_uint64(pair, &intval));
switch (prop) {
case ZFS_PROP_QUOTA:
err = dsl_dir_set_quota(dsname, source, intval);
break;
case ZFS_PROP_REFQUOTA:
err = dsl_dataset_set_quota(dsname, source, intval);
break;
case ZFS_PROP_RESERVATION:
err = dsl_dir_set_reservation(dsname, source, intval);
break;
case ZFS_PROP_REFRESERVATION:
err = dsl_dataset_set_reservation(dsname, source, intval);
break;
case ZFS_PROP_VOLSIZE:
err = zvol_set_volsize(dsname, intval);
break;
case ZFS_PROP_VERSION:
{
zfs_sb_t *zsb;
if ((err = zfs_sb_hold(dsname, FTAG, &zsb, B_TRUE)) != 0)
break;
err = zfs_set_version(zsb, intval);
zfs_sb_rele(zsb, FTAG);
if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
zfs_cmd_t *zc;
zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
(void) strcpy(zc->zc_name, dsname);
(void) zfs_ioc_userspace_upgrade(zc);
kmem_free(zc, sizeof (zfs_cmd_t));
}
break;
}
default:
err = -1;
}
return (err);
}
/*
* This function is best effort. If it fails to set any of the given properties,
* it continues to set as many as it can and returns the first error
* encountered. If the caller provides a non-NULL errlist, it also gives the
* complete list of names of all the properties it failed to set along with the
* corresponding error numbers. The caller is responsible for freeing the
* returned errlist.
*
* If every property is set successfully, zero is returned and the list pointed
* at by errlist is NULL.
*/
int
zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
nvlist_t **errlist)
{
nvpair_t *pair;
nvpair_t *propval;
int rv = 0;
uint64_t intval;
char *strval;
nvlist_t *genericnvl;
nvlist_t *errors;
nvlist_t *retrynvl;
VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
VERIFY(nvlist_alloc(&retrynvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
retry:
pair = NULL;
while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
const char *propname = nvpair_name(pair);
zfs_prop_t prop = zfs_name_to_prop(propname);
int err = 0;
/* decode the property value */
propval = pair;
if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
nvlist_t *attrs;
VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
&propval) != 0)
err = EINVAL;
}
/* Validate value type */
if (err == 0 && prop == ZPROP_INVAL) {
if (zfs_prop_user(propname)) {
if (nvpair_type(propval) != DATA_TYPE_STRING)
err = EINVAL;
} else if (zfs_prop_userquota(propname)) {
if (nvpair_type(propval) !=
DATA_TYPE_UINT64_ARRAY)
err = EINVAL;
}
} else if (err == 0) {
if (nvpair_type(propval) == DATA_TYPE_STRING) {
if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
err = EINVAL;
} else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
const char *unused;
VERIFY(nvpair_value_uint64(propval,
&intval) == 0);
switch (zfs_prop_get_type(prop)) {
case PROP_TYPE_NUMBER:
break;
case PROP_TYPE_STRING:
err = EINVAL;
break;
case PROP_TYPE_INDEX:
if (zfs_prop_index_to_string(prop,
intval, &unused) != 0)
err = EINVAL;
break;
default:
cmn_err(CE_PANIC,
"unknown property type");
}
} else {
err = EINVAL;
}
}
/* Validate permissions */
if (err == 0)
err = zfs_check_settable(dsname, pair, CRED());
if (err == 0) {
err = zfs_prop_set_special(dsname, source, pair);
if (err == -1) {
/*
* For better performance we build up a list of
* properties to set in a single transaction.
*/
err = nvlist_add_nvpair(genericnvl, pair);
} else if (err != 0 && nvl != retrynvl) {
/*
* This may be a spurious error caused by
* receiving quota and reservation out of order.
* Try again in a second pass.
*/
err = nvlist_add_nvpair(retrynvl, pair);
}
}
if (err != 0)
VERIFY(nvlist_add_int32(errors, propname, err) == 0);
}
if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
nvl = retrynvl;
goto retry;
}
if (!nvlist_empty(genericnvl) &&
dsl_props_set(dsname, source, genericnvl) != 0) {
/*
* If this fails, we still want to set as many properties as we
* can, so try setting them individually.
*/
pair = NULL;
while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
const char *propname = nvpair_name(pair);
int err = 0;
propval = pair;
if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
nvlist_t *attrs;
VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
&propval) == 0);
}
if (nvpair_type(propval) == DATA_TYPE_STRING) {
VERIFY(nvpair_value_string(propval,
&strval) == 0);
err = dsl_prop_set(dsname, propname, source, 1,
strlen(strval) + 1, strval);
} else {
VERIFY(nvpair_value_uint64(propval,
&intval) == 0);
err = dsl_prop_set(dsname, propname, source, 8,
1, &intval);
}
if (err != 0) {
VERIFY(nvlist_add_int32(errors, propname,
err) == 0);
}
}
}
nvlist_free(genericnvl);
nvlist_free(retrynvl);
if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
nvlist_free(errors);
errors = NULL;
} else {
VERIFY(nvpair_value_int32(pair, &rv) == 0);
}
if (errlist == NULL)
nvlist_free(errors);
else
*errlist = errors;
return (rv);
}
/*
* Check that all the properties are valid user properties.
*/
static int
zfs_check_userprops(char *fsname, nvlist_t *nvl)
{
nvpair_t *pair = NULL;
int error = 0;
while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
const char *propname = nvpair_name(pair);
char *valstr;
if (!zfs_prop_user(propname) ||
nvpair_type(pair) != 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(pair, &valstr) == 0);
if (strlen(valstr) >= ZAP_MAXVALUELEN)
return (E2BIG);
}
return (0);
}
static void
props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
{
nvpair_t *pair;
VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
pair = NULL;
while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
if (nvlist_exists(skipped, nvpair_name(pair)))
continue;
VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
}
}
static int
clear_received_props(objset_t *os, const char *fs, nvlist_t *props,
nvlist_t *skipped)
{
int err = 0;
nvlist_t *cleared_props = NULL;
props_skip(props, skipped, &cleared_props);
if (!nvlist_empty(cleared_props)) {
/*
* Acts on local properties until the dataset has received
* properties at least once on or after SPA_VERSION_RECVD_PROPS.
*/
zprop_source_t flags = (ZPROP_SRC_NONE |
(dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0));
err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL);
}
nvlist_free(cleared_props);
return (err);
}
/*
* inputs:
* zc_name name of filesystem
* zc_value name of property to set
* zc_nvlist_src{_size} nvlist of properties to apply
* zc_cookie received properties flag
*
* outputs:
* zc_nvlist_dst{_size} error for each unapplied received property
*/
static int
zfs_ioc_set_prop(zfs_cmd_t *zc)
{
nvlist_t *nvl;
boolean_t received = zc->zc_cookie;
zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
ZPROP_SRC_LOCAL);
nvlist_t *errors = NULL;
int error;
if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
zc->zc_iflags, &nvl)) != 0)
return (error);
if (received) {
nvlist_t *origprops;
objset_t *os;
if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) {
if (dsl_prop_get_received(os, &origprops) == 0) {
(void) clear_received_props(os,
zc->zc_name, origprops, nvl);
nvlist_free(origprops);
}
dsl_prop_set_hasrecvd(os);
dmu_objset_rele(os, FTAG);
}
}
error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors);
if (zc->zc_nvlist_dst != 0 && errors != NULL) {
(void) put_nvlist(zc, errors);
}
nvlist_free(errors);
nvlist_free(nvl);
return (error);
}
/*
* inputs:
* zc_name name of filesystem
* zc_value name of property to inherit
* zc_cookie revert to received value if TRUE
*
* outputs: none
*/
static int
zfs_ioc_inherit_prop(zfs_cmd_t *zc)
{
const char *propname = zc->zc_value;
zfs_prop_t prop = zfs_name_to_prop(propname);
boolean_t received = zc->zc_cookie;
zprop_source_t source = (received
? ZPROP_SRC_NONE /* revert to received value, if any */
: ZPROP_SRC_INHERITED); /* explicitly inherit */
if (received) {
nvlist_t *dummy;
nvpair_t *pair;
zprop_type_t type;
int err;
/*
* zfs_prop_set_special() expects properties in the form of an
* nvpair with type info.
*/
if (prop == ZPROP_INVAL) {
if (!zfs_prop_user(propname))
return (EINVAL);
type = PROP_TYPE_STRING;
} else if (prop == ZFS_PROP_VOLSIZE ||
prop == ZFS_PROP_VERSION) {
return (EINVAL);
} else {
type = zfs_prop_get_type(prop);
}
VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
switch (type) {
case PROP_TYPE_STRING:
VERIFY(0 == nvlist_add_string(dummy, propname, ""));
break;
case PROP_TYPE_NUMBER:
case PROP_TYPE_INDEX:
VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
break;
default:
nvlist_free(dummy);
return (EINVAL);
}
pair = nvlist_next_nvpair(dummy, NULL);
err = zfs_prop_set_special(zc->zc_name, source, pair);
nvlist_free(dummy);
if (err != -1)
return (err); /* special property already handled */
} else {
/*
* Only check this in the non-received case. We want to allow
* 'inherit -S' to revert non-inheritable properties like quota
* and reservation to the received or default values even though
* they are not considered inheritable.
*/
if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
return (EINVAL);
}
/* the property name has been validated by zfs_secpolicy_inherit() */
return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL));
}
static int
zfs_ioc_pool_set_props(zfs_cmd_t *zc)
{
nvlist_t *props;
spa_t *spa;
int error;
nvpair_t *pair;
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.
*/
pair = nvlist_next_nvpair(props, NULL);
if (pair != NULL && strcmp(nvpair_name(pair),
zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
nvlist_next_nvpair(props, pair) == 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) {
nvlist_free(props);
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);
}
/*
* inputs:
* zc_name name of volume
*
* outputs: none
*/
static int
zfs_ioc_create_minor(zfs_cmd_t *zc)
{
return (zvol_create_minor(zc->zc_name));
}
/*
* inputs:
* zc_name name of volume
*
* outputs: none
*/
static int
zfs_ioc_remove_minor(zfs_cmd_t *zc)
{
return (zvol_remove_minor(zc->zc_name));
}
/*
* 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);
}
#ifdef HAVE_SNAPSHOT
/*
* 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.
*/
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) {
mntget(vfsp);
vfs_found = vfsp;
break;
}
vfsp = vfsp->vfs_next;
} while (vfsp != rootvfs);
vfs_list_unlock();
return (vfs_found);
}
#endif /* HAVE_SNAPSHOT */
/* 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, boolean_t sa_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_SA && !sa_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, sa_ok;
uint64_t zplver = ZPL_VERSION;
objset_t *os = NULL;
char parentname[MAXNAMELEN];
char *cp;
spa_t *spa;
uint64_t spa_vers;
int error;
(void) strlcpy(parentname, dataset, sizeof (parentname));
cp = strrchr(parentname, '/');
ASSERT(cp != NULL);
cp[0] = '\0';
if ((error = spa_open(dataset, &spa, FTAG)) != 0)
return (error);
spa_vers = spa_version(spa);
spa_close(spa, FTAG);
zplver = zfs_zpl_version_map(spa_vers);
fuids_ok = (zplver >= ZPL_VERSION_FUID);
sa_ok = (zplver >= ZPL_VERSION_SA);
/*
* Open parent object set so we can inherit zplprop values.
*/
if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
return (error);
error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
zplprops, is_ci);
dmu_objset_rele(os, FTAG);
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;
boolean_t sa_ok;
uint64_t zplver = ZPL_VERSION;
int error;
zplver = zfs_zpl_version_map(spa_vers);
fuids_ok = (zplver >= ZPL_VERSION_FUID);
sa_ok = (zplver >= ZPL_VERSION_SA);
error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_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:
cbfunc = zvol_create_cb;
break;
default:
cbfunc = NULL;
break;
}
if (strchr(zc->zc_name, '@') ||
strchr(zc->zc_name, '%'))
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);
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_hold(zc->zc_value, FTAG, &clone);
if (error) {
nvlist_free(nvprops);
return (error);
}
error = dmu_objset_clone(zc->zc_name, dmu_objset_ds(clone), 0);
dmu_objset_rele(clone, FTAG);
if (error) {
nvlist_free(nvprops);
return (error);
}
} 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);
if ((error = zvol_check_volblocksize(
volblocksize)) != 0 ||
(error = zvol_check_volsize(volsize,
volblocksize)) != 0) {
nvlist_free(nvprops);
return (error);
}
} 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,
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) {
error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL,
nvprops, NULL);
if (error != 0)
(void) dmu_objset_destroy(zc->zc_name, B_FALSE);
}
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:
* zc_value short snapname (i.e. part after the '@')
*/
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 (!nvlist_empty(nvprops) &&
zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) {
error = ENOTSUP;
goto out;
}
error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, NULL,
nvprops, recursive, B_FALSE, -1);
out:
nvlist_free(nvprops);
return (error);
}
int
zfs_unmount_snap(const char *name, void *arg)
{
#ifdef HAVE_SNAPSHOT
vfs_t *vfsp = NULL;
if (arg) {
char *snapname = arg;
char *fullname = kmem_asprintf("%s@%s", name, snapname);
vfsp = zfs_get_vfs(fullname);
strfree(fullname);
} 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) {
mntput(vfsp);
return (err);
}
mntput(vfsp);
if ((err = dounmount(vfsp, flag, kcred)) != 0)
return (err);
}
#endif /* HAVE_SNAPSHOT */
return (0);
}
/*
* inputs:
* zc_name name of filesystem
* zc_value short name of snapshot
* zc_defer_destroy mark for deferred destroy
*
* 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,
zc->zc_defer_destroy));
}
/*
* inputs:
* zc_name name of dataset to destroy
* zc_objset_type type of objset
* zc_defer_destroy mark for deferred destroy
*
* outputs: none
*/
static int
zfs_ioc_destroy(zfs_cmd_t *zc)
{
int err;
if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) {
err = zfs_unmount_snap(zc->zc_name, NULL);
if (err)
return (err);
}
err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy);
if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
(void) zvol_remove_minor(zc->zc_name);
return (err);
}
/*
* inputs:
* zc_name name of dataset to rollback (to most recent snapshot)
*
* outputs: none
*/
static int
zfs_ioc_rollback(zfs_cmd_t *zc)
{
dsl_dataset_t *ds, *clone;
int error;
zfs_sb_t *zsb;
char *clone_name;
error = dsl_dataset_hold(zc->zc_name, FTAG, &ds);
if (error)
return (error);
/* must not be a snapshot */
if (dsl_dataset_is_snapshot(ds)) {
dsl_dataset_rele(ds, FTAG);
return (EINVAL);
}
/* must have a most recent snapshot */
if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) {
dsl_dataset_rele(ds, FTAG);
return (EINVAL);
}
/*
* Create clone of most recent snapshot.
*/
clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name);
error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT);
if (error)
goto out;
error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone);
if (error)
goto out;
/*
* Do clone swap.
*/
if (get_zfs_sb(zc->zc_name, &zsb) == 0) {
error = zfs_suspend_fs(zsb);
if (error == 0) {
int resume_err;
if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
error = dsl_dataset_clone_swap(clone, ds,
B_TRUE);
dsl_dataset_disown(ds, FTAG);
ds = NULL;
} else {
error = EBUSY;
}
resume_err = zfs_resume_fs(zsb, zc->zc_name);
error = error ? error : resume_err;
}
deactivate_super(zsb->z_sb);
} else {
if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
error = dsl_dataset_clone_swap(clone, ds, B_TRUE);
dsl_dataset_disown(ds, FTAG);
ds = NULL;
} else {
error = EBUSY;
}
}
/*
* Destroy clone (which also closes it).
*/
(void) dsl_dataset_destroy(clone, FTAG, B_FALSE);
out:
strfree(clone_name);
if (ds)
dsl_dataset_rele(ds, FTAG);
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;
int err;
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) {
err = zfs_unmount_snap(zc->zc_name, NULL);
if (err)
return (err);
}
err = dmu_objset_rename(zc->zc_name, zc->zc_value, recursive);
if ((err == 0) && (zc->zc_objset_type == DMU_OST_ZVOL)) {
(void) zvol_remove_minor(zc->zc_name);
(void) zvol_create_minor(zc->zc_value);
}
return (err);
}
static int
zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
{
const char *propname = nvpair_name(pair);
boolean_t issnap = (strchr(dsname, '@') != NULL);
zfs_prop_t prop = zfs_name_to_prop(propname);
uint64_t intval;
int err;
if (prop == ZPROP_INVAL) {
if (zfs_prop_user(propname)) {
if ((err = zfs_secpolicy_write_perms(dsname,
ZFS_DELEG_PERM_USERPROP, cr)))
return (err);
return (0);
}
if (!issnap && zfs_prop_userquota(propname)) {
const char *perm = NULL;
const char *uq_prefix =
zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
const char *gq_prefix =
zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
if (strncmp(propname, uq_prefix,
strlen(uq_prefix)) == 0) {
perm = ZFS_DELEG_PERM_USERQUOTA;
} else if (strncmp(propname, gq_prefix,
strlen(gq_prefix)) == 0) {
perm = ZFS_DELEG_PERM_GROUPQUOTA;
} else {
/* USERUSED and GROUPUSED are read-only */
return (EINVAL);
}
if ((err = zfs_secpolicy_write_perms(dsname, perm, cr)))
return (err);
return (0);
}
return (EINVAL);
}
if (issnap)
return (EINVAL);
if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
/*
* dsl_prop_get_all_impl() returns properties in this
* format.
*/
nvlist_t *attrs;
VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
&pair) == 0);
}
/*
* 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(pair) == DATA_TYPE_UINT64 &&
nvpair_value_uint64(pair, &intval) == 0) {
if (intval >= ZIO_COMPRESS_GZIP_1 &&
intval <= ZIO_COMPRESS_GZIP_9 &&
zfs_earlier_version(dsname,
SPA_VERSION_GZIP_COMPRESSION)) {
return (ENOTSUP);
}
if (intval == ZIO_COMPRESS_ZLE &&
zfs_earlier_version(dsname,
SPA_VERSION_ZLE_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(dsname) &&
!BOOTFS_COMPRESS_VALID(intval)) {
return (ERANGE);
}
}
break;
case ZFS_PROP_COPIES:
if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
return (ENOTSUP);
break;
case ZFS_PROP_DEDUP:
if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
return (ENOTSUP);
break;
case ZFS_PROP_SHARESMB:
if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
return (ENOTSUP);
break;
case ZFS_PROP_ACLINHERIT:
if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
nvpair_value_uint64(pair, &intval) == 0) {
if (intval == ZFS_ACL_PASSTHROUGH_X &&
zfs_earlier_version(dsname,
SPA_VERSION_PASSTHROUGH_X))
return (ENOTSUP);
}
break;
default:
break;
}
return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
}
/*
* Removes properties from the given props list that fail permission checks
* needed to clear them and to restore them in case of a receive error. For each
* property, make sure we have both set and inherit permissions.
*
* Returns the first error encountered if any permission checks fail. If the
* caller provides a non-NULL errlist, it also gives the complete list of names
* of all the properties that failed a permission check along with the
* corresponding error numbers. The caller is responsible for freeing the
* returned errlist.
*
* If every property checks out successfully, zero is returned and the list
* pointed at by errlist is NULL.
*/
static int
zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
{
zfs_cmd_t *zc;
nvpair_t *pair, *next_pair;
nvlist_t *errors;
int err, rv = 0;
if (props == NULL)
return (0);
VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP | KM_NODEBUG);
(void) strcpy(zc->zc_name, dataset);
pair = nvlist_next_nvpair(props, NULL);
while (pair != NULL) {
next_pair = nvlist_next_nvpair(props, pair);
(void) strcpy(zc->zc_value, nvpair_name(pair));
if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
(err = zfs_secpolicy_inherit(zc, CRED())) != 0) {
VERIFY(nvlist_remove_nvpair(props, pair) == 0);
VERIFY(nvlist_add_int32(errors,
zc->zc_value, err) == 0);
}
pair = next_pair;
}
kmem_free(zc, sizeof (zfs_cmd_t));
if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
nvlist_free(errors);
errors = NULL;
} else {
VERIFY(nvpair_value_int32(pair, &rv) == 0);
}
if (errlist == NULL)
nvlist_free(errors);
else
*errlist = errors;
return (rv);
}
static boolean_t
propval_equals(nvpair_t *p1, nvpair_t *p2)
{
if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
/* dsl_prop_get_all_impl() format */
nvlist_t *attrs;
VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
&p1) == 0);
}
if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
nvlist_t *attrs;
VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
&p2) == 0);
}
if (nvpair_type(p1) != nvpair_type(p2))
return (B_FALSE);
if (nvpair_type(p1) == DATA_TYPE_STRING) {
char *valstr1, *valstr2;
VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
return (strcmp(valstr1, valstr2) == 0);
} else {
uint64_t intval1, intval2;
VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
return (intval1 == intval2);
}
}
/*
* Remove properties from props if they are not going to change (as determined
* by comparison with origprops). Remove them from origprops as well, since we
* do not need to clear or restore properties that won't change.
*/
static void
props_reduce(nvlist_t *props, nvlist_t *origprops)
{
nvpair_t *pair, *next_pair;
if (origprops == NULL)
return; /* all props need to be received */
pair = nvlist_next_nvpair(props, NULL);
while (pair != NULL) {
const char *propname = nvpair_name(pair);
nvpair_t *match;
next_pair = nvlist_next_nvpair(props, pair);
if ((nvlist_lookup_nvpair(origprops, propname,
&match) != 0) || !propval_equals(pair, match))
goto next; /* need to set received value */
/* don't clear the existing received value */
(void) nvlist_remove_nvpair(origprops, match);
/* don't bother receiving the property */
(void) nvlist_remove_nvpair(props, pair);
next:
pair = next_pair;
}
}
#ifdef DEBUG
static boolean_t zfs_ioc_recv_inject_err;
#endif
/*
* 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
* zc_cleanup_fd cleanup-on-exit file descriptor
* zc_action_handle handle for this guid/ds mapping (or zero on first call)
*
* outputs:
* zc_cookie number of bytes read
* zc_nvlist_dst{_size} error for each unapplied received property
* zc_obj zprop_errflags_t
* zc_action_handle handle for this guid/ds mapping
*/
static int
zfs_ioc_recv(zfs_cmd_t *zc)
{
file_t *fp;
objset_t *os;
dmu_recv_cookie_t drc;
boolean_t force = (boolean_t)zc->zc_guid;
int fd;
int error = 0;
int props_error = 0;
nvlist_t *errors;
offset_t off;
nvlist_t *props = NULL; /* sent properties */
nvlist_t *origprops = NULL; /* existing properties */
objset_t *origin = NULL;
char *tosnap;
char tofs[ZFS_MAXNAMELEN];
boolean_t first_recvd_props = B_FALSE;
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';
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);
}
VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) {
if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) &&
!dsl_prop_get_hasrecvd(os)) {
first_recvd_props = B_TRUE;
}
/*
* If new received properties are supplied, they are to
* completely replace the existing received properties, so stash
* away the existing ones.
*/
if (dsl_prop_get_received(os, &origprops) == 0) {
nvlist_t *errlist = NULL;
/*
* Don't bother writing a property if its value won't
* change (and avoid the unnecessary security checks).
*
* The first receive after SPA_VERSION_RECVD_PROPS is a
* special case where we blow away all local properties
* regardless.
*/
if (!first_recvd_props)
props_reduce(props, origprops);
if (zfs_check_clearable(tofs, origprops,
&errlist) != 0)
(void) nvlist_merge(errors, errlist, 0);
nvlist_free(errlist);
}
dmu_objset_rele(os, FTAG);
}
if (zc->zc_string[0]) {
error = dmu_objset_hold(zc->zc_string, FTAG, &origin);
if (error)
goto out;
}
error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds,
&zc->zc_begin_record, force, origin, &drc);
if (origin)
dmu_objset_rele(origin, FTAG);
if (error)
goto out;
/*
* Set properties before we receive the stream so that they are applied
* to the new data. Note that we must call dmu_recv_stream() if
* dmu_recv_begin() succeeds.
*/
if (props) {
nvlist_t *errlist;
if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) {
if (drc.drc_newfs) {
if (spa_version(os->os_spa) >=
SPA_VERSION_RECVD_PROPS)
first_recvd_props = B_TRUE;
} else if (origprops != NULL) {
if (clear_received_props(os, tofs, origprops,
first_recvd_props ? NULL : props) != 0)
zc->zc_obj |= ZPROP_ERR_NOCLEAR;
} else {
zc->zc_obj |= ZPROP_ERR_NOCLEAR;
}
dsl_prop_set_hasrecvd(os);
} else if (!drc.drc_newfs) {
zc->zc_obj |= ZPROP_ERR_NOCLEAR;
}
(void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
props, &errlist);
(void) nvlist_merge(errors, errlist, 0);
nvlist_free(errlist);
}
if (fit_error_list(zc, &errors) != 0 || put_nvlist(zc, errors) != 0) {
/*
* Caller made zc->zc_nvlist_dst less than the minimum expected
* size or supplied an invalid address.
*/
props_error = EINVAL;
}
off = fp->f_offset;
error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
&zc->zc_action_handle);
if (error == 0) {
zfs_sb_t *zsb = NULL;
if (get_zfs_sb(tofs, &zsb) == 0) {
/* online recv */
int end_err;
error = zfs_suspend_fs(zsb);
/*
* If the suspend fails, then the recv_end will
* likely also fail, and clean up after itself.
*/
end_err = dmu_recv_end(&drc);
if (error == 0)
error = zfs_resume_fs(zsb, tofs);
error = error ? error : end_err;
deactivate_super(zsb->z_sb);
} else {
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;
#ifdef DEBUG
if (zfs_ioc_recv_inject_err) {
zfs_ioc_recv_inject_err = B_FALSE;
error = 1;
}
#endif
/*
* On error, restore the original props.
*/
if (error && props) {
if (dmu_objset_hold(tofs, FTAG, &os) == 0) {
if (clear_received_props(os, tofs, props, NULL) != 0) {
/*
* We failed to clear the received properties.
* Since we may have left a $recvd value on the
* system, we can't clear the $hasrecvd flag.
*/
zc->zc_obj |= ZPROP_ERR_NORESTORE;
} else if (first_recvd_props) {
dsl_prop_unset_hasrecvd(os);
}
dmu_objset_rele(os, FTAG);
} else if (!drc.drc_newfs) {
/* We failed to clear the received properties. */
zc->zc_obj |= ZPROP_ERR_NORESTORE;
}
if (origprops == NULL && !drc.drc_newfs) {
/* We failed to stash the original properties. */
zc->zc_obj |= ZPROP_ERR_NORESTORE;
}
/*
* dsl_props_set() will not convert RECEIVED to LOCAL on or
* after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
* explictly if we're restoring local properties cleared in the
* first new-style receive.
*/
if (origprops != NULL &&
zfs_set_prop_nvlist(tofs, (first_recvd_props ?
ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
origprops, NULL) != 0) {
/*
* We stashed the original properties but failed to
* restore them.
*/
zc->zc_obj |= ZPROP_ERR_NORESTORE;
}
}
out:
nvlist_free(props);
nvlist_free(origprops);
nvlist_free(errors);
releasef(fd);
if (error == 0)
error = props_error;
return (error);
}
/*
* inputs:
* zc_name name of snapshot to send
* zc_cookie file descriptor to send stream to
* zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
* zc_sendobj objsetid of snapshot to send
* zc_fromobj objsetid of incremental fromsnap (may be zero)
*
* 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;
dsl_dataset_t *ds;
dsl_dataset_t *dsfrom = NULL;
spa_t *spa;
dsl_pool_t *dp;
error = spa_open(zc->zc_name, &spa, FTAG);
if (error)
return (error);
dp = spa_get_dsl(spa);
rw_enter(&dp->dp_config_rwlock, RW_READER);
error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
rw_exit(&dp->dp_config_rwlock);
if (error) {
spa_close(spa, FTAG);
return (error);
}
error = dmu_objset_from_ds(ds, &tosnap);
if (error) {
dsl_dataset_rele(ds, FTAG);
spa_close(spa, FTAG);
return (error);
}
if (zc->zc_fromobj != 0) {
rw_enter(&dp->dp_config_rwlock, RW_READER);
error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom);
rw_exit(&dp->dp_config_rwlock);
spa_close(spa, FTAG);
if (error) {
dsl_dataset_rele(ds, FTAG);
return (error);
}
error = dmu_objset_from_ds(dsfrom, &fromsnap);
if (error) {
dsl_dataset_rele(dsfrom, FTAG);
dsl_dataset_rele(ds, FTAG);
return (error);
}
} else {
spa_close(spa, FTAG);
}
fp = getf(zc->zc_cookie);
if (fp == NULL) {
dsl_dataset_rele(ds, FTAG);
if (dsfrom)
dsl_dataset_rele(dsfrom, FTAG);
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 (dsfrom)
dsl_dataset_rele(dsfrom, FTAG);
dsl_dataset_rele(ds, FTAG);
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_get_log_state(spa) == SPA_LOG_MISSING) {
/* we need to let spa_open/spa_load clear the chains */
spa_set_log_state(spa, SPA_LOG_CLEAR);
}
spa->spa_last_open_failed = 0;
mutex_exit(&spa_namespace_lock);
if (zc->zc_cookie & ZPOOL_NO_REWIND) {
error = spa_open(zc->zc_name, &spa, FTAG);
} else {
nvlist_t *policy;
nvlist_t *config = NULL;
if (zc->zc_nvlist_src == 0)
return (EINVAL);
if ((error = get_nvlist(zc->zc_nvlist_src,
zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
error = spa_open_rewind(zc->zc_name, &spa, FTAG,
policy, &config);
if (config != NULL) {
int err;
if ((err = put_nvlist(zc, config)) != 0)
error = err;
nvlist_free(config);
}
nvlist_free(policy);
}
}
if (error)
return (error);
spa_vdev_state_enter(spa, SCL_NONE);
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:
* zc_string name of conflicting snapshot, if there is one
*/
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, zc->zc_string));
}
/*
* 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)
{
zfs_sb_t *zsb;
int error;
if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
return (EINVAL);
error = zfs_sb_hold(zc->zc_name, FTAG, &zsb, B_FALSE);
if (error)
return (error);
error = zfs_userspace_one(zsb,
zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
zfs_sb_rele(zsb, 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)
{
zfs_sb_t *zsb;
int bufsize = zc->zc_nvlist_dst_size;
int error;
void *buf;
if (bufsize <= 0)
return (ENOMEM);
error = zfs_sb_hold(zc->zc_name, FTAG, &zsb, B_FALSE);
if (error)
return (error);
buf = vmem_alloc(bufsize, KM_SLEEP);
error = zfs_userspace_many(zsb, 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);
}
vmem_free(buf, bufsize);
zfs_sb_rele(zsb, 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 = 0;
zfs_sb_t *zsb;
if (get_zfs_sb(zc->zc_name, &zsb) == 0) {
if (!dmu_objset_userused_enabled(zsb->z_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.
*/
error = zfs_suspend_fs(zsb);
if (error == 0)
error = zfs_resume_fs(zsb, zc->zc_name);
}
if (error == 0)
error = dmu_objset_userspace_upgrade(zsb->z_os);
deactivate_super(zsb->z_sb);
} else {
/* XXX kind of reading contents without owning */
error = dmu_objset_hold(zc->zc_name, FTAG, &os);
if (error)
return (error);
error = dmu_objset_userspace_upgrade(os);
dmu_objset_rele(os, FTAG);
}
return (error);
}
static int
zfs_ioc_share(zfs_cmd_t *zc)
{
return (ENOSYS);
}
ace_t full_access[] = {
{(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
};
/*
* inputs:
* zc_name name of containing filesystem
* zc_obj object # beyond which we want next in-use object #
*
* outputs:
* zc_obj next in-use object #
*/
static int
zfs_ioc_next_obj(zfs_cmd_t *zc)
{
objset_t *os = NULL;
int error;
error = dmu_objset_hold(zc->zc_name, FTAG, &os);
if (error)
return (error);
error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
dmu_objset_rele(os, FTAG);
return (error);
}
/*
* inputs:
* zc_name name of filesystem
* zc_value prefix name for snapshot
* zc_cleanup_fd cleanup-on-exit file descriptor for calling process
*
* outputs:
*/
static int
zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
{
char *snap_name;
int error;
snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
(u_longlong_t)ddi_get_lbolt64());
if (strlen(snap_name) >= MAXNAMELEN) {
strfree(snap_name);
return (E2BIG);
}
error = dmu_objset_snapshot(zc->zc_name, snap_name, snap_name,
NULL, B_FALSE, B_TRUE, zc->zc_cleanup_fd);
if (error != 0) {
strfree(snap_name);
return (error);
}
(void) strcpy(zc->zc_value, snap_name);
strfree(snap_name);
return (0);
}
/*
* inputs:
* zc_name name of "to" snapshot
* zc_value name of "from" snapshot
* zc_cookie file descriptor to write diff data on
*
* outputs:
* dmu_diff_record_t's to the file descriptor
*/
static int
zfs_ioc_diff(zfs_cmd_t *zc)
{
objset_t *fromsnap;
objset_t *tosnap;
file_t *fp;
offset_t off;
int error;
error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap);
if (error)
return (error);
error = dmu_objset_hold(zc->zc_value, FTAG, &fromsnap);
if (error) {
dmu_objset_rele(tosnap, FTAG);
return (error);
}
fp = getf(zc->zc_cookie);
if (fp == NULL) {
dmu_objset_rele(fromsnap, FTAG);
dmu_objset_rele(tosnap, FTAG);
return (EBADF);
}
off = fp->f_offset;
error = dmu_diff(tosnap, fromsnap, fp->f_vnode, &off);
if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
fp->f_offset = off;
releasef(zc->zc_cookie);
dmu_objset_rele(fromsnap, FTAG);
dmu_objset_rele(tosnap, FTAG);
return (error);
}
/*
* Remove all ACL files in shares dir
*/
#ifdef HAVE_SMB_SHARE
static int
zfs_smb_acl_purge(znode_t *dzp)
{
zap_cursor_t zc;
zap_attribute_t zap;
zfs_sb_t *zsb = ZTOZSB(dzp);
int error;
for (zap_cursor_init(&zc, zsb->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);
}
#endif /* HAVE_SMB_SHARE */
static int
zfs_ioc_smb_acl(zfs_cmd_t *zc)
{
#ifdef HAVE_SMB_SHARE
vnode_t *vp;
znode_t *dzp;
vnode_t *resourcevp = NULL;
znode_t *sharedir;
zfs_sb_t *zsb;
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);
zsb = ZTOZSB(dzp);
ZFS_ENTER(zsb);
/*
* Create share dir if its missing.
*/
mutex_enter(&zsb->z_lock);
if (zsb->z_shares_dir == 0) {
dmu_tx_t *tx;
tx = dmu_tx_create(zsb->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(zsb, tx);
dmu_tx_commit(tx);
}
if (error) {
mutex_exit(&zsb->z_lock);
VN_RELE(vp);
ZFS_EXIT(zsb);
return (error);
}
}
mutex_exit(&zsb->z_lock);
ASSERT(zsb->z_shares_dir);
if ((error = zfs_zget(zsb, zsb->z_shares_dir, &sharedir)) != 0) {
VN_RELE(vp);
ZFS_EXIT(zsb);
return (error);
}
switch (zc->zc_cookie) {
case ZFS_SMB_ACL_ADD:
vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
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(zsb);
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(zsb);
nvlist_free(nvlist);
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(zsb);
return (error);
#else
return (ENOTSUP);
#endif /* HAVE_SMB_SHARE */
}
/*
* inputs:
* zc_name name of filesystem
* zc_value short name of snap
* zc_string user-supplied tag for this hold
* zc_cookie recursive flag
* zc_temphold set if hold is temporary
* zc_cleanup_fd cleanup-on-exit file descriptor for calling process
* zc_sendobj if non-zero, the objid for zc_name@zc_value
* zc_createtxg if zc_sendobj is non-zero, snap must have zc_createtxg
*
* outputs: none
*/
static int
zfs_ioc_hold(zfs_cmd_t *zc)
{
boolean_t recursive = zc->zc_cookie;
spa_t *spa;
dsl_pool_t *dp;
dsl_dataset_t *ds;
int error;
minor_t minor = 0;
if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
return (EINVAL);
if (zc->zc_sendobj == 0) {
return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value,
zc->zc_string, recursive, zc->zc_temphold,
zc->zc_cleanup_fd));
}
if (recursive)
return (EINVAL);
error = spa_open(zc->zc_name, &spa, FTAG);
if (error)
return (error);
dp = spa_get_dsl(spa);
rw_enter(&dp->dp_config_rwlock, RW_READER);
error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
rw_exit(&dp->dp_config_rwlock);
spa_close(spa, FTAG);
if (error)
return (error);
/*
* Until we have a hold on this snapshot, it's possible that
* zc_sendobj could've been destroyed and reused as part
* of a later txg. Make sure we're looking at the right object.
*/
if (zc->zc_createtxg != ds->ds_phys->ds_creation_txg) {
dsl_dataset_rele(ds, FTAG);
return (ENOENT);
}
if (zc->zc_cleanup_fd != -1 && zc->zc_temphold) {
error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
if (error) {
dsl_dataset_rele(ds, FTAG);
return (error);
}
}
error = dsl_dataset_user_hold_for_send(ds, zc->zc_string,
zc->zc_temphold);
if (minor != 0) {
if (error == 0) {
dsl_register_onexit_hold_cleanup(ds, zc->zc_string,
minor);
}
zfs_onexit_fd_rele(zc->zc_cleanup_fd);
}
dsl_dataset_rele(ds, FTAG);
return (error);
}
/*
* inputs:
* zc_name name of dataset from which we're releasing a user hold
* zc_value short name of snap
* zc_string user-supplied tag for this hold
* zc_cookie recursive flag
*
* outputs: none
*/
static int
zfs_ioc_release(zfs_cmd_t *zc)
{
boolean_t recursive = zc->zc_cookie;
if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
return (EINVAL);
return (dsl_dataset_user_release(zc->zc_name, zc->zc_value,
zc->zc_string, recursive));
}
/*
* inputs:
* zc_name name of filesystem
*
* outputs:
* zc_nvlist_src{_size} nvlist of snapshot holds
*/
static int
zfs_ioc_get_holds(zfs_cmd_t *zc)
{
nvlist_t *nvp;
int error;
if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) {
error = put_nvlist(zc, nvp);
nvlist_free(nvp);
}
return (error);
}
/*
* inputs:
* zc_guid flags (ZEVENT_NONBLOCK)
*
* outputs:
* zc_nvlist_dst next nvlist event
* zc_cookie dropped events since last get
* zc_cleanup_fd cleanup-on-exit file descriptor
*/
static int
zfs_ioc_events_next(zfs_cmd_t *zc)
{
zfs_zevent_t *ze;
nvlist_t *event = NULL;
minor_t minor;
uint64_t dropped = 0;
int error;
error = zfs_zevent_fd_hold(zc->zc_cleanup_fd, &minor, &ze);
if (error != 0)
return (error);
do {
error = zfs_zevent_next(ze, &event,
&zc->zc_nvlist_dst_size, &dropped);
if (event != NULL) {
zc->zc_cookie = dropped;
error = put_nvlist(zc, event);
nvlist_free(event);
}
if (zc->zc_guid & ZEVENT_NONBLOCK)
break;
if ((error == 0) || (error != ENOENT))
break;
error = zfs_zevent_wait(ze);
if (error)
break;
} while (1);
zfs_zevent_fd_rele(zc->zc_cleanup_fd);
return (error);
}
/*
* outputs:
* zc_cookie cleared events count
*/
static int
zfs_ioc_events_clear(zfs_cmd_t *zc)
{
int count;
zfs_zevent_drain_all(&count);
zc->zc_cookie = count;
return 0;
}
/*
* 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,
POOL_CHECK_NONE },
{ zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_NONE },
{ zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_pool_scan, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE,
POOL_CHECK_READONLY },
{ zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_vdev_setfru, zfs_secpolicy_config, POOL_NAME, B_FALSE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
POOL_CHECK_SUSPENDED },
{ zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
POOL_CHECK_SUSPENDED },
{ zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
POOL_CHECK_SUSPENDED },
{ zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_create_minor, zfs_secpolicy_config, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_remove_minor, zfs_secpolicy_config, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE,
POOL_CHECK_NONE },
{ zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_NONE },
{ zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, DATASET_NAME,
B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_dsobj_to_dsname, zfs_secpolicy_diff, POOL_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_obj_to_path, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
POOL_CHECK_SUSPENDED },
{ zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_userspace_one, zfs_secpolicy_userspace_one, DATASET_NAME,
B_FALSE, POOL_CHECK_NONE },
{ zfs_ioc_userspace_many, zfs_secpolicy_userspace_many, DATASET_NAME,
B_FALSE, POOL_CHECK_NONE },
{ zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_hold, zfs_secpolicy_hold, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_release, zfs_secpolicy_release, DATASET_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
POOL_CHECK_SUSPENDED },
{ zfs_ioc_objset_recvd_props, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_vdev_split, zfs_secpolicy_config, POOL_NAME, B_TRUE,
POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_next_obj, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_diff, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, DATASET_NAME,
B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
{ zfs_ioc_obj_to_stats, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
POOL_CHECK_SUSPENDED },
{ zfs_ioc_events_next, zfs_secpolicy_config, NO_NAME, B_FALSE,
POOL_CHECK_NONE },
{ zfs_ioc_events_clear, zfs_secpolicy_config, NO_NAME, B_FALSE,
POOL_CHECK_NONE },
};
int
pool_status_check(const char *name, zfs_ioc_namecheck_t type,
zfs_ioc_poolcheck_t check)
{
spa_t *spa;
int error;
ASSERT(type == POOL_NAME || type == DATASET_NAME);
if (check & POOL_CHECK_NONE)
return (0);
error = spa_open(name, &spa, FTAG);
if (error == 0) {
if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
error = EAGAIN;
else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
error = EROFS;
spa_close(spa, FTAG);
}
return (error);
}
static void *
zfsdev_get_state_impl(minor_t minor, enum zfsdev_state_type which)
{
zfsdev_state_t *zs;
ASSERT(MUTEX_HELD(&zfsdev_state_lock));
for (zs = list_head(&zfsdev_state_list); zs != NULL;
zs = list_next(&zfsdev_state_list, zs)) {
if (zs->zs_minor == minor) {
switch (which) {
case ZST_ONEXIT: return (zs->zs_onexit);
case ZST_ZEVENT: return (zs->zs_zevent);
case ZST_ALL: return (zs);
}
}
}
return NULL;
}
void *
zfsdev_get_state(minor_t minor, enum zfsdev_state_type which)
{
void *ptr;
mutex_enter(&zfsdev_state_lock);
ptr = zfsdev_get_state_impl(minor, which);
mutex_exit(&zfsdev_state_lock);
return ptr;
}
minor_t
zfsdev_getminor(struct file *filp)
{
ASSERT(filp != NULL);
ASSERT(filp->private_data != NULL);
return (((zfsdev_state_t *)filp->private_data)->zs_minor);
}
/*
* Find a free minor number. The zfsdev_state_list is expected to
* be short since it is only a list of currently open file handles.
*/
minor_t
zfsdev_minor_alloc(void)
{
static minor_t last_minor = 0;
minor_t m;
ASSERT(MUTEX_HELD(&zfsdev_state_lock));
for (m = last_minor + 1; m != last_minor; m++) {
if (m > ZFSDEV_MAX_MINOR)
m = 1;
if (zfsdev_get_state_impl(m, ZST_ALL) == NULL) {
last_minor = m;
return (m);
}
}
return (0);
}
static int
zfsdev_state_init(struct file *filp)
{
zfsdev_state_t *zs;
minor_t minor;
ASSERT(MUTEX_HELD(&zfsdev_state_lock));
minor = zfsdev_minor_alloc();
if (minor == 0)
return (ENXIO);
zs = kmem_zalloc( sizeof(zfsdev_state_t), KM_SLEEP);
if (zs == NULL)
return (ENOMEM);
zs->zs_file = filp;
zs->zs_minor = minor;
filp->private_data = zs;
zfs_onexit_init((zfs_onexit_t **)&zs->zs_onexit);
zfs_zevent_init((zfs_zevent_t **)&zs->zs_zevent);
list_insert_tail(&zfsdev_state_list, zs);
return (0);
}
static int
zfsdev_state_destroy(struct file *filp)
{
zfsdev_state_t *zs;
ASSERT(MUTEX_HELD(&zfsdev_state_lock));
ASSERT(filp->private_data != NULL);
zs = filp->private_data;
zfs_onexit_destroy(zs->zs_onexit);
zfs_zevent_destroy(zs->zs_zevent);
list_remove(&zfsdev_state_list, zs);
kmem_free(zs, sizeof(zfsdev_state_t));
return 0;
}
static int
zfsdev_open(struct inode *ino, struct file *filp)
{
int error;
mutex_enter(&zfsdev_state_lock);
error = zfsdev_state_init(filp);
mutex_exit(&zfsdev_state_lock);
return (-error);
}
static int
zfsdev_release(struct inode *ino, struct file *filp)
{
int error;
mutex_enter(&zfsdev_state_lock);
error = zfsdev_state_destroy(filp);
mutex_exit(&zfsdev_state_lock);
return (-error);
}
static long
zfsdev_ioctl(struct file *filp, unsigned cmd, unsigned long arg)
{
zfs_cmd_t *zc;
uint_t vec;
int error, rc, flag = 0;
vec = cmd - ZFS_IOC;
if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
return (-EINVAL);
zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP | KM_NODEBUG);
error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
if (error != 0)
error = EFAULT;
if ((error == 0) && !(flag & FKIOCTL))
error = zfs_ioc_vec[vec].zvec_secpolicy(zc, CRED());
/*
* 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;
error = pool_status_check(zc->zc_name,
zfs_ioc_vec[vec].zvec_namecheck,
zfs_ioc_vec[vec].zvec_pool_check);
break;
case DATASET_NAME:
if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
error = EINVAL;
error = pool_status_check(zc->zc_name,
zfs_ioc_vec[vec].zvec_namecheck,
zfs_ioc_vec[vec].zvec_pool_check);
break;
case NO_NAME:
break;
}
}
if (error == 0)
error = zfs_ioc_vec[vec].zvec_func(zc);
rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
if (error == 0) {
if (rc != 0)
error = EFAULT;
if (zfs_ioc_vec[vec].zvec_his_log)
zfs_log_history(zc);
}
kmem_free(zc, sizeof (zfs_cmd_t));
return (-error);
}
#ifdef CONFIG_COMPAT
static long
zfsdev_compat_ioctl(struct file *filp, unsigned cmd, unsigned long arg)
{
return zfsdev_ioctl(filp, cmd, arg);
}
#else
#define zfsdev_compat_ioctl NULL
#endif
static const struct file_operations zfsdev_fops = {
.open = zfsdev_open,
.release = zfsdev_release,
.unlocked_ioctl = zfsdev_ioctl,
.compat_ioctl = zfsdev_compat_ioctl,
.owner = THIS_MODULE,
};
static struct miscdevice zfs_misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = ZFS_DRIVER,
.fops = &zfsdev_fops,
};
static int
zfs_attach(void)
{
int error;
mutex_init(&zfsdev_state_lock, NULL, MUTEX_DEFAULT, NULL);
list_create(&zfsdev_state_list, sizeof (zfsdev_state_t),
offsetof(zfsdev_state_t, zs_next));
error = misc_register(&zfs_misc);
if (error) {
printk(KERN_INFO "ZFS: misc_register() failed %d\n", error);
return (error);
}
return (0);
}
static void
zfs_detach(void)
{
int error;
error = misc_deregister(&zfs_misc);
if (error)
printk(KERN_INFO "ZFS: misc_deregister() failed %d\n", error);
mutex_destroy(&zfsdev_state_lock);
list_destroy(&zfsdev_state_list);
}
uint_t zfs_fsyncer_key;
extern uint_t rrw_tsd_key;
#ifdef DEBUG
#define ZFS_DEBUG_STR " (DEBUG mode)"
#else
#define ZFS_DEBUG_STR ""
#endif
int
_init(void)
{
int error;
spa_init(FREAD | FWRITE);
zfs_init();
if ((error = zvol_init()) != 0)
goto out1;
if ((error = zfs_attach()) != 0)
goto out2;
tsd_create(&zfs_fsyncer_key, NULL);
tsd_create(&rrw_tsd_key, NULL);
printk(KERN_NOTICE "ZFS: Loaded module v%s%s, "
"ZFS pool version %s, ZFS filesystem version %s\n",
ZFS_META_VERSION, ZFS_DEBUG_STR,
SPA_VERSION_STRING, ZPL_VERSION_STRING);
return (0);
out2:
(void) zvol_fini();
out1:
zfs_fini();
spa_fini();
printk(KERN_NOTICE "ZFS: Failed to Load ZFS Filesystem v%s%s"
", rc = %d\n", ZFS_META_VERSION, ZFS_DEBUG_STR, error);
return (error);
}
int
_fini(void)
{
zfs_detach();
zvol_fini();
zfs_fini();
spa_fini();
tsd_destroy(&zfs_fsyncer_key);
tsd_destroy(&rrw_tsd_key);
printk(KERN_NOTICE "ZFS: Unloaded module v%s%s\n",
ZFS_META_VERSION, ZFS_DEBUG_STR);
return (0);
}
#ifdef HAVE_SPL
spl_module_init(_init);
spl_module_exit(_fini);
MODULE_DESCRIPTION("ZFS");
MODULE_AUTHOR(ZFS_META_AUTHOR);
MODULE_LICENSE(ZFS_META_LICENSE);
#endif /* HAVE_SPL */
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