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mirror_zfs/lib/libzfs/libzfs_dataset.c
Brian Behlendorf 2cf7f52bc4 Linux compat 2.6.39: mount_nodev() 
The .get_sb callback has been replaced by a .mount callback
in the file_system_type structure.  When using the new
interface the caller must now use the mount_nodev() helper.

Unfortunately, the new interface no longer passes the vfsmount
down to the zfs layers.  This poses a problem for the existing
implementation because we currently save this pointer in the
super block for latter use.  It provides our only entry point
in to the namespace layer for manipulating certain mount options.

This needed to be done originally to allow commands like
'zfs set atime=off tank' to work properly.  It also allowed me
to keep more of the original Solaris code unmodified.  Under
Solaris there is a 1-to-1 mapping between a mount point and a
file system so this is a fairly natural thing to do.  However,
under Linux they many be multiple entries in the namespace
which reference the same filesystem.  Thus keeping a back
reference from the filesystem to the namespace is complicated.

Rather than introduce some ugly hack to get the vfsmount and
continue as before.  I'm leveraging this API change to update
the ZFS code to do things in a more natural way for Linux.
This has the upside that is resolves the compatibility issue
for the long term and fixes several other minor bugs which
have been reported.

This commit updates the code to remove this vfsmount back
reference entirely.  All modifications to filesystem mount
options are now passed in to the kernel via a '-o remount'.
This is the expected Linux mechanism and allows the namespace
to properly handle any options which apply to it before passing
them on to the file system itself.

Aside from fixing the compatibility issue, removing the
vfsmount has had the benefit of simplifying the code.  This
change which fairly involved has turned out nicely.

Closes #246
Closes #217
Closes #187
Closes #248
Closes #231
2011-07-01 13:36:39 -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 <ctype.h>
#include <errno.h>
#include <libintl.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <stddef.h>
#include <zone.h>
#include <fcntl.h>
#include <sys/mntent.h>
#include <sys/mount.h>
#include <priv.h>
#include <pwd.h>
#include <grp.h>
#include <stddef.h>
#include <ucred.h>
#ifdef HAVE_IDMAP
#include <idmap.h>
#include <aclutils.h>
#include <directory.h>
#endif /* HAVE_IDMAP */
#include <sys/dnode.h>
#include <sys/spa.h>
#include <sys/zap.h>
#include <libzfs.h>
#include "zfs_namecheck.h"
#include "zfs_prop.h"
#include "libzfs_impl.h"
#include "zfs_deleg.h"
static int zvol_create_link_common(libzfs_handle_t *, const char *, int);
static int userquota_propname_decode(const char *propname, boolean_t zoned,
zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
/*
* Given a single type (not a mask of types), return the type in a human
* readable form.
*/
const char *
zfs_type_to_name(zfs_type_t type)
{
switch (type) {
case ZFS_TYPE_FILESYSTEM:
return (dgettext(TEXT_DOMAIN, "filesystem"));
case ZFS_TYPE_SNAPSHOT:
return (dgettext(TEXT_DOMAIN, "snapshot"));
case ZFS_TYPE_VOLUME:
return (dgettext(TEXT_DOMAIN, "volume"));
default:
break;
}
return (NULL);
}
/*
* Validate a ZFS path. This is used even before trying to open the dataset, to
* provide a more meaningful error message. We call zfs_error_aux() to
* explain exactly why the name was not valid.
*/
int
zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
boolean_t modifying)
{
namecheck_err_t why;
char what;
if (dataset_namecheck(path, &why, &what) != 0) {
if (hdl != NULL) {
switch (why) {
case NAME_ERR_TOOLONG:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"name is too long"));
break;
case NAME_ERR_LEADING_SLASH:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"leading slash in name"));
break;
case NAME_ERR_EMPTY_COMPONENT:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"empty component in name"));
break;
case NAME_ERR_TRAILING_SLASH:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"trailing slash in name"));
break;
case NAME_ERR_INVALCHAR:
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN, "invalid character "
"'%c' in name"), what);
break;
case NAME_ERR_MULTIPLE_AT:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"multiple '@' delimiters in name"));
break;
case NAME_ERR_NOLETTER:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool doesn't begin with a letter"));
break;
case NAME_ERR_RESERVED:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"name is reserved"));
break;
case NAME_ERR_DISKLIKE:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"reserved disk name"));
break;
default:
break;
}
}
return (0);
}
if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
if (hdl != NULL)
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"snapshot delimiter '@' in filesystem name"));
return (0);
}
if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
if (hdl != NULL)
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"missing '@' delimiter in snapshot name"));
return (0);
}
if (modifying && strchr(path, '%') != NULL) {
if (hdl != NULL)
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"invalid character %c in name"), '%');
return (0);
}
return (-1);
}
int
zfs_name_valid(const char *name, zfs_type_t type)
{
if (type == ZFS_TYPE_POOL)
return (zpool_name_valid(NULL, B_FALSE, name));
return (zfs_validate_name(NULL, name, type, B_FALSE));
}
/*
* This function takes the raw DSL properties, and filters out the user-defined
* properties into a separate nvlist.
*/
static nvlist_t *
process_user_props(zfs_handle_t *zhp, nvlist_t *props)
{
libzfs_handle_t *hdl = zhp->zfs_hdl;
nvpair_t *elem;
nvlist_t *propval;
nvlist_t *nvl;
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
(void) no_memory(hdl);
return (NULL);
}
elem = NULL;
while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
if (!zfs_prop_user(nvpair_name(elem)))
continue;
verify(nvpair_value_nvlist(elem, &propval) == 0);
if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
nvlist_free(nvl);
(void) no_memory(hdl);
return (NULL);
}
}
return (nvl);
}
static zpool_handle_t *
zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
{
libzfs_handle_t *hdl = zhp->zfs_hdl;
zpool_handle_t *zph;
if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
if (hdl->libzfs_pool_handles != NULL)
zph->zpool_next = hdl->libzfs_pool_handles;
hdl->libzfs_pool_handles = zph;
}
return (zph);
}
static zpool_handle_t *
zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
{
libzfs_handle_t *hdl = zhp->zfs_hdl;
zpool_handle_t *zph = hdl->libzfs_pool_handles;
while ((zph != NULL) &&
(strncmp(pool_name, zpool_get_name(zph), len) != 0))
zph = zph->zpool_next;
return (zph);
}
/*
* Returns a handle to the pool that contains the provided dataset.
* If a handle to that pool already exists then that handle is returned.
* Otherwise, a new handle is created and added to the list of handles.
*/
static zpool_handle_t *
zpool_handle(zfs_handle_t *zhp)
{
char *pool_name;
int len;
zpool_handle_t *zph;
len = strcspn(zhp->zfs_name, "/@") + 1;
pool_name = zfs_alloc(zhp->zfs_hdl, len);
(void) strlcpy(pool_name, zhp->zfs_name, len);
zph = zpool_find_handle(zhp, pool_name, len);
if (zph == NULL)
zph = zpool_add_handle(zhp, pool_name);
free(pool_name);
return (zph);
}
void
zpool_free_handles(libzfs_handle_t *hdl)
{
zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
while (zph != NULL) {
next = zph->zpool_next;
zpool_close(zph);
zph = next;
}
hdl->libzfs_pool_handles = NULL;
}
/*
* Utility function to gather stats (objset and zpl) for the given object.
*/
static int
get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
{
libzfs_handle_t *hdl = zhp->zfs_hdl;
(void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
if (errno == ENOMEM) {
if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
return (-1);
}
} else {
return (-1);
}
}
return (0);
}
/*
* Utility function to get the received properties of the given object.
*/
static int
get_recvd_props_ioctl(zfs_handle_t *zhp)
{
libzfs_handle_t *hdl = zhp->zfs_hdl;
nvlist_t *recvdprops;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
int err;
if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
return (-1);
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
if (errno == ENOMEM) {
if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
return (-1);
}
} else {
zcmd_free_nvlists(&zc);
return (-1);
}
}
err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
zcmd_free_nvlists(&zc);
if (err != 0)
return (-1);
nvlist_free(zhp->zfs_recvd_props);
zhp->zfs_recvd_props = recvdprops;
return (0);
}
static int
put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
{
nvlist_t *allprops, *userprops;
zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
return (-1);
}
/*
* XXX Why do we store the user props separately, in addition to
* storing them in zfs_props?
*/
if ((userprops = process_user_props(zhp, allprops)) == NULL) {
nvlist_free(allprops);
return (-1);
}
nvlist_free(zhp->zfs_props);
nvlist_free(zhp->zfs_user_props);
zhp->zfs_props = allprops;
zhp->zfs_user_props = userprops;
return (0);
}
static int
get_stats(zfs_handle_t *zhp)
{
int rc = 0;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
return (-1);
if (get_stats_ioctl(zhp, &zc) != 0)
rc = -1;
else if (put_stats_zhdl(zhp, &zc) != 0)
rc = -1;
zcmd_free_nvlists(&zc);
return (rc);
}
/*
* Refresh the properties currently stored in the handle.
*/
void
zfs_refresh_properties(zfs_handle_t *zhp)
{
(void) get_stats(zhp);
}
/*
* Makes a handle from the given dataset name. Used by zfs_open() and
* zfs_iter_* to create child handles on the fly.
*/
static int
make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
{
if (put_stats_zhdl(zhp, zc) != 0)
return (-1);
/*
* We've managed to open the dataset and gather statistics. Determine
* the high-level type.
*/
if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
zhp->zfs_head_type = ZFS_TYPE_VOLUME;
else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
else
abort();
if (zhp->zfs_dmustats.dds_is_snapshot)
zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
zhp->zfs_type = ZFS_TYPE_VOLUME;
else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
else
abort(); /* we should never see any other types */
if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
return (-1);
return (0);
}
zfs_handle_t *
make_dataset_handle(libzfs_handle_t *hdl, const char *path)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
if (zhp == NULL)
return (NULL);
zhp->zfs_hdl = hdl;
(void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
free(zhp);
return (NULL);
}
if (get_stats_ioctl(zhp, &zc) == -1) {
zcmd_free_nvlists(&zc);
free(zhp);
return (NULL);
}
if (make_dataset_handle_common(zhp, &zc) == -1) {
free(zhp);
zhp = NULL;
}
zcmd_free_nvlists(&zc);
return (zhp);
}
static zfs_handle_t *
make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
{
zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
if (zhp == NULL)
return (NULL);
zhp->zfs_hdl = hdl;
(void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
if (make_dataset_handle_common(zhp, zc) == -1) {
free(zhp);
return (NULL);
}
return (zhp);
}
/*
* Opens the given snapshot, filesystem, or volume. The 'types'
* argument is a mask of acceptable types. The function will print an
* appropriate error message and return NULL if it can't be opened.
*/
zfs_handle_t *
zfs_open(libzfs_handle_t *hdl, const char *path, int types)
{
zfs_handle_t *zhp;
char errbuf[1024];
(void) snprintf(errbuf, sizeof (errbuf),
dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
/*
* Validate the name before we even try to open it.
*/
if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"invalid dataset name"));
(void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
return (NULL);
}
/*
* Try to get stats for the dataset, which will tell us if it exists.
*/
errno = 0;
if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
(void) zfs_standard_error(hdl, errno, errbuf);
return (NULL);
}
if (!(types & zhp->zfs_type)) {
(void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
zfs_close(zhp);
return (NULL);
}
return (zhp);
}
/*
* Release a ZFS handle. Nothing to do but free the associated memory.
*/
void
zfs_close(zfs_handle_t *zhp)
{
if (zhp->zfs_mntopts)
free(zhp->zfs_mntopts);
nvlist_free(zhp->zfs_props);
nvlist_free(zhp->zfs_user_props);
nvlist_free(zhp->zfs_recvd_props);
free(zhp);
}
typedef struct mnttab_node {
struct mnttab mtn_mt;
avl_node_t mtn_node;
} mnttab_node_t;
static int
libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
{
const mnttab_node_t *mtn1 = arg1;
const mnttab_node_t *mtn2 = arg2;
int rv;
rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
if (rv == 0)
return (0);
return (rv > 0 ? 1 : -1);
}
void
libzfs_mnttab_init(libzfs_handle_t *hdl)
{
assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
}
void
libzfs_mnttab_update(libzfs_handle_t *hdl)
{
struct mnttab entry;
rewind(hdl->libzfs_mnttab);
while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
mnttab_node_t *mtn;
if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
continue;
mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
avl_add(&hdl->libzfs_mnttab_cache, mtn);
}
}
void
libzfs_mnttab_fini(libzfs_handle_t *hdl)
{
void *cookie = NULL;
mnttab_node_t *mtn;
while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))) {
free(mtn->mtn_mt.mnt_special);
free(mtn->mtn_mt.mnt_mountp);
free(mtn->mtn_mt.mnt_fstype);
free(mtn->mtn_mt.mnt_mntopts);
free(mtn);
}
avl_destroy(&hdl->libzfs_mnttab_cache);
}
void
libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
{
hdl->libzfs_mnttab_enable = enable;
}
int
libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
struct mnttab *entry)
{
mnttab_node_t find;
mnttab_node_t *mtn;
if (!hdl->libzfs_mnttab_enable) {
struct mnttab srch = { 0 };
if (avl_numnodes(&hdl->libzfs_mnttab_cache))
libzfs_mnttab_fini(hdl);
rewind(hdl->libzfs_mnttab);
srch.mnt_special = (char *)fsname;
srch.mnt_fstype = MNTTYPE_ZFS;
if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
return (0);
else
return (ENOENT);
}
if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
libzfs_mnttab_update(hdl);
find.mtn_mt.mnt_special = (char *)fsname;
mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
if (mtn) {
*entry = mtn->mtn_mt;
return (0);
}
return (ENOENT);
}
void
libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
const char *mountp, const char *mntopts)
{
mnttab_node_t *mtn;
if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
return;
mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
avl_add(&hdl->libzfs_mnttab_cache, mtn);
}
void
libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
{
mnttab_node_t find;
mnttab_node_t *ret;
find.mtn_mt.mnt_special = (char *)fsname;
if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))) {
avl_remove(&hdl->libzfs_mnttab_cache, ret);
free(ret->mtn_mt.mnt_special);
free(ret->mtn_mt.mnt_mountp);
free(ret->mtn_mt.mnt_fstype);
free(ret->mtn_mt.mnt_mntopts);
free(ret);
}
}
int
zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
{
zpool_handle_t *zpool_handle = zhp->zpool_hdl;
if (zpool_handle == NULL)
return (-1);
*spa_version = zpool_get_prop_int(zpool_handle,
ZPOOL_PROP_VERSION, NULL);
return (0);
}
/*
* The choice of reservation property depends on the SPA version.
*/
static int
zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
{
int spa_version;
if (zfs_spa_version(zhp, &spa_version) < 0)
return (-1);
if (spa_version >= SPA_VERSION_REFRESERVATION)
*resv_prop = ZFS_PROP_REFRESERVATION;
else
*resv_prop = ZFS_PROP_RESERVATION;
return (0);
}
/*
* Given an nvlist of properties to set, validates that they are correct, and
* parses any numeric properties (index, boolean, etc) if they are specified as
* strings.
*/
nvlist_t *
zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
uint64_t zoned, zfs_handle_t *zhp, const char *errbuf)
{
nvpair_t *elem;
uint64_t intval;
char *strval;
zfs_prop_t prop;
nvlist_t *ret;
int chosen_normal = -1;
int chosen_utf = -1;
if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
(void) no_memory(hdl);
return (NULL);
}
/*
* Make sure this property is valid and applies to this type.
*/
elem = NULL;
while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
const char *propname = nvpair_name(elem);
prop = zfs_name_to_prop(propname);
if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
/*
* This is a user property: make sure it's a
* string, and that it's less than ZAP_MAXNAMELEN.
*/
if (nvpair_type(elem) != DATA_TYPE_STRING) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' must be a string"), propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"property name '%s' is too long"),
propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
(void) nvpair_value_string(elem, &strval);
if (nvlist_add_string(ret, propname, strval) != 0) {
(void) no_memory(hdl);
goto error;
}
continue;
}
/*
* Currently, only user properties can be modified on
* snapshots.
*/
if (type == ZFS_TYPE_SNAPSHOT) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"this property can not be modified for snapshots"));
(void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
goto error;
}
if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
zfs_userquota_prop_t uqtype;
char newpropname[128];
char domain[128];
uint64_t rid;
uint64_t valary[3];
if (userquota_propname_decode(propname, zoned,
&uqtype, domain, sizeof (domain), &rid) != 0) {
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN,
"'%s' has an invalid user/group name"),
propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
if (uqtype != ZFS_PROP_USERQUOTA &&
uqtype != ZFS_PROP_GROUPQUOTA) {
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN, "'%s' is readonly"),
propname);
(void) zfs_error(hdl, EZFS_PROPREADONLY,
errbuf);
goto error;
}
if (nvpair_type(elem) == DATA_TYPE_STRING) {
(void) nvpair_value_string(elem, &strval);
if (strcmp(strval, "none") == 0) {
intval = 0;
} else if (zfs_nicestrtonum(hdl,
strval, &intval) != 0) {
(void) zfs_error(hdl,
EZFS_BADPROP, errbuf);
goto error;
}
} else if (nvpair_type(elem) ==
DATA_TYPE_UINT64) {
(void) nvpair_value_uint64(elem, &intval);
if (intval == 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"use 'none' to disable "
"userquota/groupquota"));
goto error;
}
} else {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' must be a number"), propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
/*
* Encode the prop name as
* userquota@<hex-rid>-domain, to make it easy
* for the kernel to decode.
*/
(void) snprintf(newpropname, sizeof (newpropname),
"%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
(longlong_t)rid, domain);
valary[0] = uqtype;
valary[1] = rid;
valary[2] = intval;
if (nvlist_add_uint64_array(ret, newpropname,
valary, 3) != 0) {
(void) no_memory(hdl);
goto error;
}
continue;
}
if (prop == ZPROP_INVAL) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"invalid property '%s'"), propname);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
if (!zfs_prop_valid_for_type(prop, type)) {
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN, "'%s' does not "
"apply to datasets of this type"), propname);
(void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
goto error;
}
if (zfs_prop_readonly(prop) &&
(!zfs_prop_setonce(prop) || zhp != NULL)) {
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN, "'%s' is readonly"),
propname);
(void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
goto error;
}
if (zprop_parse_value(hdl, elem, prop, type, ret,
&strval, &intval, errbuf) != 0)
goto error;
/*
* Perform some additional checks for specific properties.
*/
switch (prop) {
case ZFS_PROP_VERSION:
{
int version;
if (zhp == NULL)
break;
version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
if (intval < version) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"Can not downgrade; already at version %u"),
version);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
break;
}
case ZFS_PROP_RECORDSIZE:
case ZFS_PROP_VOLBLOCKSIZE:
/* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */
if (intval < SPA_MINBLOCKSIZE ||
intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' must be power of 2 from %u "
"to %uk"), propname,
(uint_t)SPA_MINBLOCKSIZE,
(uint_t)SPA_MAXBLOCKSIZE >> 10);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
break;
case ZFS_PROP_MLSLABEL:
{
#ifdef HAVE_MLSLABEL
/*
* Verify the mlslabel string and convert to
* internal hex label string.
*/
m_label_t *new_sl;
char *hex = NULL; /* internal label string */
/* Default value is already OK. */
if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
break;
/* Verify the label can be converted to binary form */
if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
(str_to_label(strval, &new_sl, MAC_LABEL,
L_NO_CORRECTION, NULL) == -1)) {
goto badlabel;
}
/* Now translate to hex internal label string */
if (label_to_str(new_sl, &hex, M_INTERNAL,
DEF_NAMES) != 0) {
if (hex)
free(hex);
goto badlabel;
}
m_label_free(new_sl);
/* If string is already in internal form, we're done. */
if (strcmp(strval, hex) == 0) {
free(hex);
break;
}
/* Replace the label string with the internal form. */
(void) nvlist_remove(ret, zfs_prop_to_name(prop),
DATA_TYPE_STRING);
verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
hex) == 0);
free(hex);
break;
badlabel:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"invalid mlslabel '%s'"), strval);
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
m_label_free(new_sl); /* OK if null */
goto error;
#else
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"mlslabels are unsupported"));
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
#endif /* HAVE_MLSLABEL */
}
case ZFS_PROP_MOUNTPOINT:
{
namecheck_err_t why;
if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
break;
if (mountpoint_namecheck(strval, &why)) {
switch (why) {
case NAME_ERR_LEADING_SLASH:
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN,
"'%s' must be an absolute path, "
"'none', or 'legacy'"), propname);
break;
case NAME_ERR_TOOLONG:
zfs_error_aux(hdl,
dgettext(TEXT_DOMAIN,
"component of '%s' is too long"),
propname);
break;
default:
break;
}
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
}
/*FALLTHRU*/
case ZFS_PROP_SHARESMB:
case ZFS_PROP_SHARENFS:
/*
* For the mountpoint and sharenfs or sharesmb
* properties, check if it can be set in a
* global/non-global zone based on
* the zoned property value:
*
* global zone non-global zone
* --------------------------------------------------
* zoned=on mountpoint (no) mountpoint (yes)
* sharenfs (no) sharenfs (no)
* sharesmb (no) sharesmb (no)
*
* zoned=off mountpoint (yes) N/A
* sharenfs (yes)
* sharesmb (yes)
*/
if (zoned) {
if (getzoneid() == GLOBAL_ZONEID) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' cannot be set on "
"dataset in a non-global zone"),
propname);
(void) zfs_error(hdl, EZFS_ZONED,
errbuf);
goto error;
} else if (prop == ZFS_PROP_SHARENFS ||
prop == ZFS_PROP_SHARESMB) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' cannot be set in "
"a non-global zone"), propname);
(void) zfs_error(hdl, EZFS_ZONED,
errbuf);
goto error;
}
} else if (getzoneid() != GLOBAL_ZONEID) {
/*
* If zoned property is 'off', this must be in
* a global zone. If not, something is wrong.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' cannot be set while dataset "
"'zoned' property is set"), propname);
(void) zfs_error(hdl, EZFS_ZONED, errbuf);
goto error;
}
/*
* At this point, it is legitimate to set the
* property. Now we want to make sure that the
* property value is valid if it is sharenfs.
*/
if ((prop == ZFS_PROP_SHARENFS ||
prop == ZFS_PROP_SHARESMB) &&
strcmp(strval, "on") != 0 &&
strcmp(strval, "off") != 0) {
zfs_share_proto_t proto;
if (prop == ZFS_PROP_SHARESMB)
proto = PROTO_SMB;
else
proto = PROTO_NFS;
/*
* Must be an valid sharing protocol
* option string so init the libshare
* in order to enable the parser and
* then parse the options. We use the
* control API since we don't care about
* the current configuration and don't
* want the overhead of loading it
* until we actually do something.
*/
if (zfs_init_libshare(hdl,
SA_INIT_CONTROL_API) != SA_OK) {
/*
* An error occurred so we can't do
* anything
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' cannot be set: problem "
"in share initialization"),
propname);
(void) zfs_error(hdl, EZFS_BADPROP,
errbuf);
goto error;
}
if (zfs_parse_options(strval, proto) != SA_OK) {
/*
* There was an error in parsing so
* deal with it by issuing an error
* message and leaving after
* uninitializing the the libshare
* interface.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' cannot be set to invalid "
"options"), propname);
(void) zfs_error(hdl, EZFS_BADPROP,
errbuf);
zfs_uninit_libshare(hdl);
goto error;
}
zfs_uninit_libshare(hdl);
}
break;
case ZFS_PROP_UTF8ONLY:
chosen_utf = (int)intval;
break;
case ZFS_PROP_NORMALIZE:
chosen_normal = (int)intval;
break;
default:
break;
}
/*
* For changes to existing volumes, we have some additional
* checks to enforce.
*/
if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
uint64_t volsize = zfs_prop_get_int(zhp,
ZFS_PROP_VOLSIZE);
uint64_t blocksize = zfs_prop_get_int(zhp,
ZFS_PROP_VOLBLOCKSIZE);
char buf[64];
switch (prop) {
case ZFS_PROP_RESERVATION:
case ZFS_PROP_REFRESERVATION:
if (intval > volsize) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' is greater than current "
"volume size"), propname);
(void) zfs_error(hdl, EZFS_BADPROP,
errbuf);
goto error;
}
break;
case ZFS_PROP_VOLSIZE:
if (intval % blocksize != 0) {
zfs_nicenum(blocksize, buf,
sizeof (buf));
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' must be a multiple of "
"volume block size (%s)"),
propname, buf);
(void) zfs_error(hdl, EZFS_BADPROP,
errbuf);
goto error;
}
if (intval == 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' cannot be zero"),
propname);
(void) zfs_error(hdl, EZFS_BADPROP,
errbuf);
goto error;
}
break;
default:
break;
}
}
}
/*
* If normalization was chosen, but no UTF8 choice was made,
* enforce rejection of non-UTF8 names.
*
* If normalization was chosen, but rejecting non-UTF8 names
* was explicitly not chosen, it is an error.
*/
if (chosen_normal > 0 && chosen_utf < 0) {
if (nvlist_add_uint64(ret,
zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
(void) no_memory(hdl);
goto error;
}
} else if (chosen_normal > 0 && chosen_utf == 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"'%s' must be set 'on' if normalization chosen"),
zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
goto error;
}
return (ret);
error:
nvlist_free(ret);
return (NULL);
}
int
zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
{
uint64_t old_volsize;
uint64_t new_volsize;
uint64_t old_reservation;
uint64_t new_reservation;
zfs_prop_t resv_prop;
/*
* If this is an existing volume, and someone is setting the volsize,
* make sure that it matches the reservation, or add it if necessary.
*/
old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
return (-1);
old_reservation = zfs_prop_get_int(zhp, resv_prop);
if ((zvol_volsize_to_reservation(old_volsize, zhp->zfs_props) !=
old_reservation) || nvlist_lookup_uint64(nvl,
zfs_prop_to_name(resv_prop), &new_reservation) != ENOENT) {
return (0);
}
if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
&new_volsize) != 0)
return (-1);
new_reservation = zvol_volsize_to_reservation(new_volsize,
zhp->zfs_props);
if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
new_reservation) != 0) {
(void) no_memory(zhp->zfs_hdl);
return (-1);
}
return (1);
}
void
zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
char *errbuf)
{
switch (err) {
case ENOSPC:
/*
* For quotas and reservations, ENOSPC indicates
* something different; setting a quota or reservation
* doesn't use any disk space.
*/
switch (prop) {
case ZFS_PROP_QUOTA:
case ZFS_PROP_REFQUOTA:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"size is less than current used or "
"reserved space"));
(void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
break;
case ZFS_PROP_RESERVATION:
case ZFS_PROP_REFRESERVATION:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"size is greater than available space"));
(void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
break;
default:
(void) zfs_standard_error(hdl, err, errbuf);
break;
}
break;
case EBUSY:
(void) zfs_standard_error(hdl, EBUSY, errbuf);
break;
case EROFS:
(void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
break;
case ENOTSUP:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool and or dataset must be upgraded to set this "
"property or value"));
(void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
break;
case ERANGE:
if (prop == ZFS_PROP_COMPRESSION) {
(void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"property setting is not allowed on "
"bootable datasets"));
(void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
} else {
(void) zfs_standard_error(hdl, err, errbuf);
}
break;
case EINVAL:
if (prop == ZPROP_INVAL) {
(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
} else {
(void) zfs_standard_error(hdl, err, errbuf);
}
break;
case EOVERFLOW:
/*
* This platform can't address a volume this big.
*/
#ifdef _ILP32
if (prop == ZFS_PROP_VOLSIZE) {
(void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
break;
}
#endif
/* FALLTHROUGH */
default:
(void) zfs_standard_error(hdl, err, errbuf);
}
}
static boolean_t
zfs_is_namespace_prop(zfs_prop_t prop)
{
switch (prop) {
case ZFS_PROP_ATIME:
case ZFS_PROP_DEVICES:
case ZFS_PROP_EXEC:
case ZFS_PROP_SETUID:
case ZFS_PROP_READONLY:
case ZFS_PROP_XATTR:
case ZFS_PROP_NBMAND:
return (B_TRUE);
default:
return (B_FALSE);
}
}
/*
* Given a property name and value, set the property for the given dataset.
*/
int
zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
int ret = -1;
prop_changelist_t *cl = NULL;
char errbuf[1024];
libzfs_handle_t *hdl = zhp->zfs_hdl;
nvlist_t *nvl = NULL, *realprops;
zfs_prop_t prop;
boolean_t do_prefix;
uint64_t idx;
int added_resv = 0;
(void) snprintf(errbuf, sizeof (errbuf),
dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
zhp->zfs_name);
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
nvlist_add_string(nvl, propname, propval) != 0) {
(void) no_memory(hdl);
goto error;
}
if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl,
zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
goto error;
nvlist_free(nvl);
nvl = realprops;
prop = zfs_name_to_prop(propname);
if (prop == ZFS_PROP_VOLSIZE) {
if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1)
goto error;
}
if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
goto error;
if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"child dataset with inherited mountpoint is used "
"in a non-global zone"));
ret = zfs_error(hdl, EZFS_ZONED, errbuf);
goto error;
}
/*
* If the dataset's canmount property is being set to noauto,
* then we want to prevent unmounting & remounting it.
*/
do_prefix = !((prop == ZFS_PROP_CANMOUNT) &&
(zprop_string_to_index(prop, propval, &idx,
ZFS_TYPE_DATASET) == 0) && (idx == ZFS_CANMOUNT_NOAUTO));
if (do_prefix && (ret = changelist_prefix(cl)) != 0)
goto error;
/*
* Execute the corresponding ioctl() to set this property.
*/
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
goto error;
ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
if (ret != 0) {
zfs_setprop_error(hdl, prop, errno, errbuf);
if (added_resv && errno == ENOSPC) {
/* clean up the volsize property we tried to set */
uint64_t old_volsize = zfs_prop_get_int(zhp,
ZFS_PROP_VOLSIZE);
nvlist_free(nvl);
zcmd_free_nvlists(&zc);
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
goto error;
if (nvlist_add_uint64(nvl,
zfs_prop_to_name(ZFS_PROP_VOLSIZE),
old_volsize) != 0)
goto error;
if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
goto error;
(void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
}
} else {
if (do_prefix)
ret = changelist_postfix(cl);
if (ret == 0) {
/*
* Refresh the statistics so the new property
* value is reflected.
*/
(void) get_stats(zhp);
/*
* Remount the filesystem to propagate the change
* if one of the options handled by the generic
* Linux namespace layer has been modified.
*/
if (zfs_is_namespace_prop(prop) &&
zfs_is_mounted(zhp, NULL))
ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
}
}
error:
nvlist_free(nvl);
zcmd_free_nvlists(&zc);
if (cl)
changelist_free(cl);
return (ret);
}
/*
* Given a property, inherit the value from the parent dataset, or if received
* is TRUE, revert to the received value, if any.
*/
int
zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
int ret;
prop_changelist_t *cl;
libzfs_handle_t *hdl = zhp->zfs_hdl;
char errbuf[1024];
zfs_prop_t prop;
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot inherit %s for '%s'"), propname, zhp->zfs_name);
zc.zc_cookie = received;
if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
/*
* For user properties, the amount of work we have to do is very
* small, so just do it here.
*/
if (!zfs_prop_user(propname)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"invalid property"));
return (zfs_error(hdl, EZFS_BADPROP, errbuf));
}
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
return (zfs_standard_error(hdl, errno, errbuf));
return (0);
}
/*
* Verify that this property is inheritable.
*/
if (zfs_prop_readonly(prop))
return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
if (!zfs_prop_inheritable(prop) && !received)
return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
/*
* Check to see if the value applies to this type
*/
if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
/*
* Normalize the name, to get rid of shorthand abbreviations.
*/
propname = zfs_prop_to_name(prop);
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"dataset is used in a non-global zone"));
return (zfs_error(hdl, EZFS_ZONED, errbuf));
}
/*
* Determine datasets which will be affected by this change, if any.
*/
if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
return (-1);
if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"child dataset with inherited mountpoint is used "
"in a non-global zone"));
ret = zfs_error(hdl, EZFS_ZONED, errbuf);
goto error;
}
if ((ret = changelist_prefix(cl)) != 0)
goto error;
if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
return (zfs_standard_error(hdl, errno, errbuf));
} else {
if ((ret = changelist_postfix(cl)) != 0)
goto error;
/*
* Refresh the statistics so the new property is reflected.
*/
(void) get_stats(zhp);
}
error:
changelist_free(cl);
return (ret);
}
/*
* True DSL properties are stored in an nvlist. The following two functions
* extract them appropriately.
*/
uint64_t
getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
{
nvlist_t *nv;
uint64_t value;
*source = NULL;
if (nvlist_lookup_nvlist(zhp->zfs_props,
zfs_prop_to_name(prop), &nv) == 0) {
verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
(void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
} else {
verify(!zhp->zfs_props_table ||
zhp->zfs_props_table[prop] == B_TRUE);
value = zfs_prop_default_numeric(prop);
*source = "";
}
return (value);
}
static char *
getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
{
nvlist_t *nv;
char *value;
*source = NULL;
if (nvlist_lookup_nvlist(zhp->zfs_props,
zfs_prop_to_name(prop), &nv) == 0) {
verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
(void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
} else {
verify(!zhp->zfs_props_table ||
zhp->zfs_props_table[prop] == B_TRUE);
if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
value = "";
*source = "";
}
return (value);
}
static boolean_t
zfs_is_recvd_props_mode(zfs_handle_t *zhp)
{
return (zhp->zfs_props == zhp->zfs_recvd_props);
}
static void
zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
{
*cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
zhp->zfs_props = zhp->zfs_recvd_props;
}
static void
zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
{
zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
*cookie = 0;
}
/*
* Internal function for getting a numeric property. Both zfs_prop_get() and
* zfs_prop_get_int() are built using this interface.
*
* Certain properties can be overridden using 'mount -o'. In this case, scan
* the contents of the /etc/mtab entry, searching for the appropriate options.
* If they differ from the on-disk values, report the current values and mark
* the source "temporary".
*/
static int
get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
char **source, uint64_t *val)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
nvlist_t *zplprops = NULL;
struct mnttab mnt;
char *mntopt_on = NULL;
char *mntopt_off = NULL;
boolean_t received = zfs_is_recvd_props_mode(zhp);
*source = NULL;
switch (prop) {
case ZFS_PROP_ATIME:
mntopt_on = MNTOPT_ATIME;
mntopt_off = MNTOPT_NOATIME;
break;
case ZFS_PROP_DEVICES:
mntopt_on = MNTOPT_DEVICES;
mntopt_off = MNTOPT_NODEVICES;
break;
case ZFS_PROP_EXEC:
mntopt_on = MNTOPT_EXEC;
mntopt_off = MNTOPT_NOEXEC;
break;
case ZFS_PROP_READONLY:
mntopt_on = MNTOPT_RO;
mntopt_off = MNTOPT_RW;
break;
case ZFS_PROP_SETUID:
mntopt_on = MNTOPT_SETUID;
mntopt_off = MNTOPT_NOSETUID;
break;
case ZFS_PROP_XATTR:
mntopt_on = MNTOPT_XATTR;
mntopt_off = MNTOPT_NOXATTR;
break;
case ZFS_PROP_NBMAND:
mntopt_on = MNTOPT_NBMAND;
mntopt_off = MNTOPT_NONBMAND;
break;
default:
break;
}
/*
* Because looking up the mount options is potentially expensive
* (iterating over all of /etc/mtab), we defer its calculation until
* we're looking up a property which requires its presence.
*/
if (!zhp->zfs_mntcheck &&
(mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
libzfs_handle_t *hdl = zhp->zfs_hdl;
struct mnttab entry;
if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
zhp->zfs_mntopts = zfs_strdup(hdl,
entry.mnt_mntopts);
if (zhp->zfs_mntopts == NULL)
return (-1);
}
zhp->zfs_mntcheck = B_TRUE;
}
if (zhp->zfs_mntopts == NULL)
mnt.mnt_mntopts = "";
else
mnt.mnt_mntopts = zhp->zfs_mntopts;
switch (prop) {
case ZFS_PROP_ATIME:
case ZFS_PROP_DEVICES:
case ZFS_PROP_EXEC:
case ZFS_PROP_READONLY:
case ZFS_PROP_SETUID:
case ZFS_PROP_XATTR:
case ZFS_PROP_NBMAND:
*val = getprop_uint64(zhp, prop, source);
if (received)
break;
if (hasmntopt(&mnt, mntopt_on) && !*val) {
*val = B_TRUE;
if (src)
*src = ZPROP_SRC_TEMPORARY;
} else if (hasmntopt(&mnt, mntopt_off) && *val) {
*val = B_FALSE;
if (src)
*src = ZPROP_SRC_TEMPORARY;
}
break;
case ZFS_PROP_CANMOUNT:
case ZFS_PROP_VOLSIZE:
case ZFS_PROP_QUOTA:
case ZFS_PROP_REFQUOTA:
case ZFS_PROP_RESERVATION:
case ZFS_PROP_REFRESERVATION:
*val = getprop_uint64(zhp, prop, source);
if (*source == NULL) {
/* not default, must be local */
*source = zhp->zfs_name;
}
break;
case ZFS_PROP_MOUNTED:
*val = (zhp->zfs_mntopts != NULL);
break;
case ZFS_PROP_NUMCLONES:
*val = zhp->zfs_dmustats.dds_num_clones;
break;
case ZFS_PROP_VERSION:
case ZFS_PROP_NORMALIZE:
case ZFS_PROP_UTF8ONLY:
case ZFS_PROP_CASE:
if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
return (-1);
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
zcmd_free_nvlists(&zc);
return (-1);
}
if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
val) != 0) {
zcmd_free_nvlists(&zc);
return (-1);
}
if (zplprops)
nvlist_free(zplprops);
zcmd_free_nvlists(&zc);
break;
default:
switch (zfs_prop_get_type(prop)) {
case PROP_TYPE_NUMBER:
case PROP_TYPE_INDEX:
*val = getprop_uint64(zhp, prop, source);
/*
* If we tried to use a default value for a
* readonly property, it means that it was not
* present.
*/
if (zfs_prop_readonly(prop) &&
*source != NULL && (*source)[0] == '\0') {
*source = NULL;
}
break;
case PROP_TYPE_STRING:
default:
zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
"cannot get non-numeric property"));
return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
dgettext(TEXT_DOMAIN, "internal error")));
}
}
return (0);
}
/*
* Calculate the source type, given the raw source string.
*/
static void
get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
char *statbuf, size_t statlen)
{
if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
return;
if (source == NULL) {
*srctype = ZPROP_SRC_NONE;
} else if (source[0] == '\0') {
*srctype = ZPROP_SRC_DEFAULT;
} else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
*srctype = ZPROP_SRC_RECEIVED;
} else {
if (strcmp(source, zhp->zfs_name) == 0) {
*srctype = ZPROP_SRC_LOCAL;
} else {
(void) strlcpy(statbuf, source, statlen);
*srctype = ZPROP_SRC_INHERITED;
}
}
}
int
zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
size_t proplen, boolean_t literal)
{
zfs_prop_t prop;
int err = 0;
if (zhp->zfs_recvd_props == NULL)
if (get_recvd_props_ioctl(zhp) != 0)
return (-1);
prop = zfs_name_to_prop(propname);
if (prop != ZPROP_INVAL) {
uint64_t cookie;
if (!nvlist_exists(zhp->zfs_recvd_props, propname))
return (-1);
zfs_set_recvd_props_mode(zhp, &cookie);
err = zfs_prop_get(zhp, prop, propbuf, proplen,
NULL, NULL, 0, literal);
zfs_unset_recvd_props_mode(zhp, &cookie);
} else if (zfs_prop_userquota(propname)) {
return (-1);
} else {
nvlist_t *propval;
char *recvdval;
if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
propname, &propval) != 0)
return (-1);
verify(nvlist_lookup_string(propval, ZPROP_VALUE,
&recvdval) == 0);
(void) strlcpy(propbuf, recvdval, proplen);
}
return (err == 0 ? 0 : -1);
}
/*
* Retrieve a property from the given object. If 'literal' is specified, then
* numbers are left as exact values. Otherwise, numbers are converted to a
* human-readable form.
*
* Returns 0 on success, or -1 on error.
*/
int
zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
{
char *source = NULL;
uint64_t val;
char *str;
const char *strval;
boolean_t received = zfs_is_recvd_props_mode(zhp);
/*
* Check to see if this property applies to our object
*/
if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
return (-1);
if (received && zfs_prop_readonly(prop))
return (-1);
if (src)
*src = ZPROP_SRC_NONE;
switch (prop) {
case ZFS_PROP_CREATION:
/*
* 'creation' is a time_t stored in the statistics. We convert
* this into a string unless 'literal' is specified.
*/
{
val = getprop_uint64(zhp, prop, &source);
time_t time = (time_t)val;
struct tm t;
if (literal ||
localtime_r(&time, &t) == NULL ||
strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
&t) == 0)
(void) snprintf(propbuf, proplen, "%llu", (u_longlong_t) val);
}
break;
case ZFS_PROP_MOUNTPOINT:
/*
* Getting the precise mountpoint can be tricky.
*
* - for 'none' or 'legacy', return those values.
* - for inherited mountpoints, we want to take everything
* after our ancestor and append it to the inherited value.
*
* If the pool has an alternate root, we want to prepend that
* root to any values we return.
*/
str = getprop_string(zhp, prop, &source);
if (str[0] == '/') {
char buf[MAXPATHLEN];
char *root = buf;
const char *relpath;
/*
* If we inherit the mountpoint, even from a dataset
* with a received value, the source will be the path of
* the dataset we inherit from. If source is
* ZPROP_SOURCE_VAL_RECVD, the received value is not
* inherited.
*/
if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
relpath = "";
} else {
relpath = zhp->zfs_name + strlen(source);
if (relpath[0] == '/')
relpath++;
}
if ((zpool_get_prop(zhp->zpool_hdl,
ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL)) ||
(strcmp(root, "-") == 0))
root[0] = '\0';
/*
* Special case an alternate root of '/'. This will
* avoid having multiple leading slashes in the
* mountpoint path.
*/
if (strcmp(root, "/") == 0)
root++;
/*
* If the mountpoint is '/' then skip over this
* if we are obtaining either an alternate root or
* an inherited mountpoint.
*/
if (str[1] == '\0' && (root[0] != '\0' ||
relpath[0] != '\0'))
str++;
if (relpath[0] == '\0')
(void) snprintf(propbuf, proplen, "%s%s",
root, str);
else
(void) snprintf(propbuf, proplen, "%s%s%s%s",
root, str, relpath[0] == '@' ? "" : "/",
relpath);
} else {
/* 'legacy' or 'none' */
(void) strlcpy(propbuf, str, proplen);
}
break;
case ZFS_PROP_ORIGIN:
(void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
proplen);
/*
* If there is no parent at all, return failure to indicate that
* it doesn't apply to this dataset.
*/
if (propbuf[0] == '\0')
return (-1);
break;
case ZFS_PROP_QUOTA:
case ZFS_PROP_REFQUOTA:
case ZFS_PROP_RESERVATION:
case ZFS_PROP_REFRESERVATION:
if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
return (-1);
/*
* If quota or reservation is 0, we translate this into 'none'
* (unless literal is set), and indicate that it's the default
* value. Otherwise, we print the number nicely and indicate
* that its set locally.
*/
if (val == 0) {
if (literal)
(void) strlcpy(propbuf, "0", proplen);
else
(void) strlcpy(propbuf, "none", proplen);
} else {
if (literal)
(void) snprintf(propbuf, proplen, "%llu",
(u_longlong_t)val);
else
zfs_nicenum(val, propbuf, proplen);
}
break;
case ZFS_PROP_COMPRESSRATIO:
if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
return (-1);
(void) snprintf(propbuf, proplen, "%llu.%02llux",
(u_longlong_t)(val / 100),
(u_longlong_t)(val % 100));
break;
case ZFS_PROP_TYPE:
switch (zhp->zfs_type) {
case ZFS_TYPE_FILESYSTEM:
str = "filesystem";
break;
case ZFS_TYPE_VOLUME:
str = "volume";
break;
case ZFS_TYPE_SNAPSHOT:
str = "snapshot";
break;
default:
abort();
}
(void) snprintf(propbuf, proplen, "%s", str);
break;
case ZFS_PROP_MOUNTED:
/*
* The 'mounted' property is a pseudo-property that described
* whether the filesystem is currently mounted. Even though
* it's a boolean value, the typical values of "on" and "off"
* don't make sense, so we translate to "yes" and "no".
*/
if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
src, &source, &val) != 0)
return (-1);
if (val)
(void) strlcpy(propbuf, "yes", proplen);
else
(void) strlcpy(propbuf, "no", proplen);
break;
case ZFS_PROP_NAME:
/*
* The 'name' property is a pseudo-property derived from the
* dataset name. It is presented as a real property to simplify
* consumers.
*/
(void) strlcpy(propbuf, zhp->zfs_name, proplen);
break;
case ZFS_PROP_MLSLABEL:
{
#ifdef HAVE_MLSLABEL
m_label_t *new_sl = NULL;
char *ascii = NULL; /* human readable label */
(void) strlcpy(propbuf,
getprop_string(zhp, prop, &source), proplen);
if (literal || (strcasecmp(propbuf,
ZFS_MLSLABEL_DEFAULT) == 0))
break;
/*
* Try to translate the internal hex string to
* human-readable output. If there are any
* problems just use the hex string.
*/
if (str_to_label(propbuf, &new_sl, MAC_LABEL,
L_NO_CORRECTION, NULL) == -1) {
m_label_free(new_sl);
break;
}
if (label_to_str(new_sl, &ascii, M_LABEL,
DEF_NAMES) != 0) {
if (ascii)
free(ascii);
m_label_free(new_sl);
break;
}
m_label_free(new_sl);
(void) strlcpy(propbuf, ascii, proplen);
free(ascii);
#else
(void) strlcpy(propbuf,
getprop_string(zhp, prop, &source), proplen);
#endif /* HAVE_MLSLABEL */
}
break;
default:
switch (zfs_prop_get_type(prop)) {
case PROP_TYPE_NUMBER:
if (get_numeric_property(zhp, prop, src,
&source, &val) != 0)
return (-1);
if (literal)
(void) snprintf(propbuf, proplen, "%llu",
(u_longlong_t)val);
else
zfs_nicenum(val, propbuf, proplen);
break;
case PROP_TYPE_STRING:
(void) strlcpy(propbuf,
getprop_string(zhp, prop, &source), proplen);
break;
case PROP_TYPE_INDEX:
if (get_numeric_property(zhp, prop, src,
&source, &val) != 0)
return (-1);
if (zfs_prop_index_to_string(prop, val, &strval) != 0)
return (-1);
(void) strlcpy(propbuf, strval, proplen);
break;
default:
abort();
}
}
get_source(zhp, src, source, statbuf, statlen);
return (0);
}
/*
* Utility function to get the given numeric property. Does no validation that
* the given property is the appropriate type; should only be used with
* hard-coded property types.
*/
uint64_t
zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
{
char *source;
uint64_t val;
(void) get_numeric_property(zhp, prop, NULL, &source, &val);
return (val);
}
int
zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
{
char buf[64];
(void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
}
/*
* Similar to zfs_prop_get(), but returns the value as an integer.
*/
int
zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
zprop_source_t *src, char *statbuf, size_t statlen)
{
char *source;
/*
* Check to see if this property applies to our object
*/
if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
zfs_prop_to_name(prop)));
}
if (src)
*src = ZPROP_SRC_NONE;
if (get_numeric_property(zhp, prop, src, &source, value) != 0)
return (-1);
get_source(zhp, src, source, statbuf, statlen);
return (0);
}
#ifdef HAVE_IDMAP
static int
idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
char **domainp, idmap_rid_t *ridp)
{
idmap_get_handle_t *get_hdl = NULL;
idmap_stat status;
int err = EINVAL;
if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
goto out;
if (isuser) {
err = idmap_get_sidbyuid(get_hdl, id,
IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
} else {
err = idmap_get_sidbygid(get_hdl, id,
IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
}
if (err == IDMAP_SUCCESS &&
idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
status == IDMAP_SUCCESS)
err = 0;
else
err = EINVAL;
out:
if (get_hdl)
idmap_get_destroy(get_hdl);
return (err);
}
#endif /* HAVE_IDMAP */
/*
* convert the propname into parameters needed by kernel
* Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
* Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
*/
static int
userquota_propname_decode(const char *propname, boolean_t zoned,
zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
{
zfs_userquota_prop_t type;
char *cp, *end;
char *numericsid = NULL;
boolean_t isuser;
domain[0] = '\0';
/* Figure out the property type ({user|group}{quota|space}) */
for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
if (strncmp(propname, zfs_userquota_prop_prefixes[type],
strlen(zfs_userquota_prop_prefixes[type])) == 0)
break;
}
if (type == ZFS_NUM_USERQUOTA_PROPS)
return (EINVAL);
*typep = type;
isuser = (type == ZFS_PROP_USERQUOTA ||
type == ZFS_PROP_USERUSED);
cp = strchr(propname, '@') + 1;
if (strchr(cp, '@')) {
#ifdef HAVE_IDMAP
/*
* It's a SID name (eg "user@domain") that needs to be
* turned into S-1-domainID-RID.
*/
directory_error_t e;
if (zoned && getzoneid() == GLOBAL_ZONEID)
return (ENOENT);
if (isuser) {
e = directory_sid_from_user_name(NULL,
cp, &numericsid);
} else {
e = directory_sid_from_group_name(NULL,
cp, &numericsid);
}
if (e != NULL) {
directory_error_free(e);
return (ENOENT);
}
if (numericsid == NULL)
return (ENOENT);
cp = numericsid;
/* will be further decoded below */
#else
return (ENOSYS);
#endif /* HAVE_IDMAP */
}
if (strncmp(cp, "S-1-", 4) == 0) {
/* It's a numeric SID (eg "S-1-234-567-89") */
(void) strlcpy(domain, cp, domainlen);
cp = strrchr(domain, '-');
*cp = '\0';
cp++;
errno = 0;
*ridp = strtoull(cp, &end, 10);
if (numericsid) {
free(numericsid);
numericsid = NULL;
}
if (errno != 0 || *end != '\0')
return (EINVAL);
} else if (!isdigit(*cp)) {
/*
* It's a user/group name (eg "user") that needs to be
* turned into a uid/gid
*/
if (zoned && getzoneid() == GLOBAL_ZONEID)
return (ENOENT);
if (isuser) {
struct passwd *pw;
pw = getpwnam(cp);
if (pw == NULL)
return (ENOENT);
*ridp = pw->pw_uid;
} else {
struct group *gr;
gr = getgrnam(cp);
if (gr == NULL)
return (ENOENT);
*ridp = gr->gr_gid;
}
} else {
#ifdef HAVE_IDMAP
/* It's a user/group ID (eg "12345"). */
uid_t id = strtoul(cp, &end, 10);
idmap_rid_t rid;
char *mapdomain;
if (*end != '\0')
return (EINVAL);
if (id > MAXUID) {
/* It's an ephemeral ID. */
if (idmap_id_to_numeric_domain_rid(id, isuser,
&mapdomain, &rid) != 0)
return (ENOENT);
(void) strlcpy(domain, mapdomain, domainlen);
*ridp = rid;
} else {
*ridp = id;
}
#else
return (ENOSYS);
#endif /* HAVE_IDMAP */
}
ASSERT3P(numericsid, ==, NULL);
return (0);
}
static int
zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
uint64_t *propvalue, zfs_userquota_prop_t *typep)
{
int err;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
(void) strncpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
err = userquota_propname_decode(propname,
zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
zc.zc_objset_type = *typep;
if (err)
return (err);
err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
if (err)
return (err);
*propvalue = zc.zc_cookie;
return (0);
}
int
zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
uint64_t *propvalue)
{
zfs_userquota_prop_t type;
return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
&type));
}
int
zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
char *propbuf, int proplen, boolean_t literal)
{
int err;
uint64_t propvalue;
zfs_userquota_prop_t type;
err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
&type);
if (err)
return (err);
if (literal) {
(void) snprintf(propbuf, proplen, "%llu",
(u_longlong_t)propvalue);
} else if (propvalue == 0 &&
(type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
(void) strlcpy(propbuf, "none", proplen);
} else {
zfs_nicenum(propvalue, propbuf, proplen);
}
return (0);
}
/*
* Returns the name of the given zfs handle.
*/
const char *
zfs_get_name(const zfs_handle_t *zhp)
{
return (zhp->zfs_name);
}
/*
* Returns the type of the given zfs handle.
*/
zfs_type_t
zfs_get_type(const zfs_handle_t *zhp)
{
return (zhp->zfs_type);
}
static int
zfs_do_list_ioctl(zfs_handle_t *zhp, int arg, zfs_cmd_t *zc)
{
int rc;
uint64_t orig_cookie;
orig_cookie = zc->zc_cookie;
top:
(void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
rc = ioctl(zhp->zfs_hdl->libzfs_fd, arg, zc);
if (rc == -1) {
switch (errno) {
case ENOMEM:
/* expand nvlist memory and try again */
if (zcmd_expand_dst_nvlist(zhp->zfs_hdl, zc) != 0) {
zcmd_free_nvlists(zc);
return (-1);
}
zc->zc_cookie = orig_cookie;
goto top;
/*
* An errno value of ESRCH indicates normal completion.
* If ENOENT is returned, then the underlying dataset
* has been removed since we obtained the handle.
*/
case ESRCH:
case ENOENT:
rc = 1;
break;
default:
rc = zfs_standard_error(zhp->zfs_hdl, errno,
dgettext(TEXT_DOMAIN,
"cannot iterate filesystems"));
break;
}
}
return (rc);
}
/*
* Iterate over all child filesystems
*/
int
zfs_iter_filesystems(zfs_handle_t *zhp, zfs_iter_f func, void *data)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
zfs_handle_t *nzhp;
int ret;
if (zhp->zfs_type != ZFS_TYPE_FILESYSTEM)
return (0);
if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
return (-1);
while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_DATASET_LIST_NEXT,
&zc)) == 0) {
/*
* Silently ignore errors, as the only plausible explanation is
* that the pool has since been removed.
*/
if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl,
&zc)) == NULL) {
continue;
}
if ((ret = func(nzhp, data)) != 0) {
zcmd_free_nvlists(&zc);
return (ret);
}
}
zcmd_free_nvlists(&zc);
return ((ret < 0) ? ret : 0);
}
/*
* Iterate over all snapshots
*/
int
zfs_iter_snapshots(zfs_handle_t *zhp, zfs_iter_f func, void *data)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
zfs_handle_t *nzhp;
int ret;
if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT)
return (0);
if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
return (-1);
while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_SNAPSHOT_LIST_NEXT,
&zc)) == 0) {
if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl,
&zc)) == NULL) {
continue;
}
if ((ret = func(nzhp, data)) != 0) {
zcmd_free_nvlists(&zc);
return (ret);
}
}
zcmd_free_nvlists(&zc);
return ((ret < 0) ? ret : 0);
}
/*
* Iterate over all children, snapshots and filesystems
*/
int
zfs_iter_children(zfs_handle_t *zhp, zfs_iter_f func, void *data)
{
int ret;
if ((ret = zfs_iter_filesystems(zhp, func, data)) != 0)
return (ret);
return (zfs_iter_snapshots(zhp, func, data));
}
/*
* Is one dataset name a child dataset of another?
*
* Needs to handle these cases:
* Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
* Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
* Descendant? No. No. No. Yes.
*/
static boolean_t
is_descendant(const char *ds1, const char *ds2)
{
size_t d1len = strlen(ds1);
/* ds2 can't be a descendant if it's smaller */
if (strlen(ds2) < d1len)
return (B_FALSE);
/* otherwise, compare strings and verify that there's a '/' char */
return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
}
/*
* Given a complete name, return just the portion that refers to the parent.
* Can return NULL if this is a pool.
*/
static int
parent_name(const char *path, char *buf, size_t buflen)
{
char *loc;
if ((loc = strrchr(path, '/')) == NULL)
return (-1);
(void) strncpy(buf, path, MIN(buflen, loc - path));
buf[loc - path] = '\0';
return (0);
}
/*
* If accept_ancestor is false, then check to make sure that the given path has
* a parent, and that it exists. If accept_ancestor is true, then find the
* closest existing ancestor for the given path. In prefixlen return the
* length of already existing prefix of the given path. We also fetch the
* 'zoned' property, which is used to validate property settings when creating
* new datasets.
*/
static int
check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
boolean_t accept_ancestor, int *prefixlen)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
char parent[ZFS_MAXNAMELEN];
char *slash;
zfs_handle_t *zhp;
char errbuf[1024];
uint64_t is_zoned;
(void) snprintf(errbuf, sizeof (errbuf),
dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
/* get parent, and check to see if this is just a pool */
if (parent_name(path, parent, sizeof (parent)) != 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"missing dataset name"));
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
}
/* check to see if the pool exists */
if ((slash = strchr(parent, '/')) == NULL)
slash = parent + strlen(parent);
(void) strncpy(zc.zc_name, parent, slash - parent);
zc.zc_name[slash - parent] = '\0';
if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
errno == ENOENT) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"no such pool '%s'"), zc.zc_name);
return (zfs_error(hdl, EZFS_NOENT, errbuf));
}
/* check to see if the parent dataset exists */
while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
if (errno == ENOENT && accept_ancestor) {
/*
* Go deeper to find an ancestor, give up on top level.
*/
if (parent_name(parent, parent, sizeof (parent)) != 0) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"no such pool '%s'"), zc.zc_name);
return (zfs_error(hdl, EZFS_NOENT, errbuf));
}
} else if (errno == ENOENT) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"parent does not exist"));
return (zfs_error(hdl, EZFS_NOENT, errbuf));
} else
return (zfs_standard_error(hdl, errno, errbuf));
}
is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
if (zoned != NULL)
*zoned = is_zoned;
/* we are in a non-global zone, but parent is in the global zone */
if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
(void) zfs_standard_error(hdl, EPERM, errbuf);
zfs_close(zhp);
return (-1);
}
/* make sure parent is a filesystem */
if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"parent is not a filesystem"));
(void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
zfs_close(zhp);
return (-1);
}
zfs_close(zhp);
if (prefixlen != NULL)
*prefixlen = strlen(parent);
return (0);
}
/*
* Finds whether the dataset of the given type(s) exists.
*/
boolean_t
zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
{
zfs_handle_t *zhp;
if (!zfs_validate_name(hdl, path, types, B_FALSE))
return (B_FALSE);
/*
* Try to get stats for the dataset, which will tell us if it exists.
*/
if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
int ds_type = zhp->zfs_type;
zfs_close(zhp);
if (types & ds_type)
return (B_TRUE);
}
return (B_FALSE);
}
/*
* Given a path to 'target', create all the ancestors between
* the prefixlen portion of the path, and the target itself.
* Fail if the initial prefixlen-ancestor does not already exist.
*/
int
create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
{
zfs_handle_t *h;
char *cp;
const char *opname;
/* make sure prefix exists */
cp = target + prefixlen;
if (*cp != '/') {
assert(strchr(cp, '/') == NULL);
h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
} else {
*cp = '\0';
h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
*cp = '/';
}
if (h == NULL)
return (-1);
zfs_close(h);
/*
* Attempt to create, mount, and share any ancestor filesystems,
* up to the prefixlen-long one.
*/
for (cp = target + prefixlen + 1;
(cp = strchr(cp, '/')); *cp = '/', cp++) {
char *logstr;
*cp = '\0';
h = make_dataset_handle(hdl, target);
if (h) {
/* it already exists, nothing to do here */
zfs_close(h);
continue;
}
logstr = hdl->libzfs_log_str;
hdl->libzfs_log_str = NULL;
if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
NULL) != 0) {
hdl->libzfs_log_str = logstr;
opname = dgettext(TEXT_DOMAIN, "create");
goto ancestorerr;
}
hdl->libzfs_log_str = logstr;
h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
if (h == NULL) {
opname = dgettext(TEXT_DOMAIN, "open");
goto ancestorerr;
}
if (zfs_mount(h, NULL, 0) != 0) {
opname = dgettext(TEXT_DOMAIN, "mount");
goto ancestorerr;
}
if (zfs_share(h) != 0) {
opname = dgettext(TEXT_DOMAIN, "share");
goto ancestorerr;
}
zfs_close(h);
}
return (0);
ancestorerr:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"failed to %s ancestor '%s'"), opname, target);
return (-1);
}
/*
* Creates non-existing ancestors of the given path.
*/
int
zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
{
int prefix;
char *path_copy;
int rc = 0;
if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
return (-1);
if ((path_copy = strdup(path)) != NULL) {
rc = create_parents(hdl, path_copy, prefix);
free(path_copy);
}
if (path_copy == NULL || rc != 0)
return (-1);
return (0);
}
/*
* Create a new filesystem or volume.
*/
int
zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
nvlist_t *props)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
int ret;
uint64_t size = 0;
uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
char errbuf[1024];
uint64_t zoned;
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot create '%s'"), path);
/* validate the path, taking care to note the extended error message */
if (!zfs_validate_name(hdl, path, type, B_TRUE))
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
/* validate parents exist */
if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
return (-1);
/*
* The failure modes when creating a dataset of a different type over
* one that already exists is a little strange. In particular, if you
* try to create a dataset on top of an existing dataset, the ioctl()
* will return ENOENT, not EEXIST. To prevent this from happening, we
* first try to see if the dataset exists.
*/
(void) strlcpy(zc.zc_name, path, sizeof (zc.zc_name));
if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"dataset already exists"));
return (zfs_error(hdl, EZFS_EXISTS, errbuf));
}
if (type == ZFS_TYPE_VOLUME)
zc.zc_objset_type = DMU_OST_ZVOL;
else
zc.zc_objset_type = DMU_OST_ZFS;
if (props && (props = zfs_valid_proplist(hdl, type, props,
zoned, NULL, errbuf)) == 0)
return (-1);
if (type == ZFS_TYPE_VOLUME) {
/*
* If we are creating a volume, the size and block size must
* satisfy a few restraints. First, the blocksize must be a
* valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
* volsize must be a multiple of the block size, and cannot be
* zero.
*/
if (props == NULL || nvlist_lookup_uint64(props,
zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
nvlist_free(props);
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"missing volume size"));
return (zfs_error(hdl, EZFS_BADPROP, errbuf));
}
if ((ret = nvlist_lookup_uint64(props,
zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
&blocksize)) != 0) {
if (ret == ENOENT) {
blocksize = zfs_prop_default_numeric(
ZFS_PROP_VOLBLOCKSIZE);
} else {
nvlist_free(props);
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"missing volume block size"));
return (zfs_error(hdl, EZFS_BADPROP, errbuf));
}
}
if (size == 0) {
nvlist_free(props);
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"volume size cannot be zero"));
return (zfs_error(hdl, EZFS_BADPROP, errbuf));
}
if (size % blocksize != 0) {
nvlist_free(props);
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"volume size must be a multiple of volume block "
"size"));
return (zfs_error(hdl, EZFS_BADPROP, errbuf));
}
}
if (props && zcmd_write_src_nvlist(hdl, &zc, props) != 0)
return (-1);
nvlist_free(props);
/* create the dataset */
ret = zfs_ioctl(hdl, ZFS_IOC_CREATE, &zc);
if (ret == 0 && type == ZFS_TYPE_VOLUME) {
ret = zvol_create_link(hdl, path);
if (ret) {
(void) zfs_standard_error(hdl, errno,
dgettext(TEXT_DOMAIN,
"Volume successfully created, but device links "
"were not created"));
zcmd_free_nvlists(&zc);
return (-1);
}
}
zcmd_free_nvlists(&zc);
/* check for failure */
if (ret != 0) {
char parent[ZFS_MAXNAMELEN];
(void) parent_name(path, parent, sizeof (parent));
switch (errno) {
case ENOENT:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"no such parent '%s'"), parent);
return (zfs_error(hdl, EZFS_NOENT, errbuf));
case EINVAL:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"parent '%s' is not a filesystem"), parent);
return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
case EDOM:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"volume block size must be power of 2 from "
"%u to %uk"),
(uint_t)SPA_MINBLOCKSIZE,
(uint_t)SPA_MAXBLOCKSIZE >> 10);
return (zfs_error(hdl, EZFS_BADPROP, errbuf));
case ENOTSUP:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool must be upgraded to set this "
"property or value"));
return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
#ifdef _ILP32
case EOVERFLOW:
/*
* This platform can't address a volume this big.
*/
if (type == ZFS_TYPE_VOLUME)
return (zfs_error(hdl, EZFS_VOLTOOBIG,
errbuf));
#endif
/* FALLTHROUGH */
default:
return (zfs_standard_error(hdl, errno, errbuf));
}
}
return (0);
}
/*
* Destroys the given dataset. The caller must make sure that the filesystem
* isn't mounted, and that there are no active dependents.
*/
int
zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
if (ZFS_IS_VOLUME(zhp)) {
if (zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name) != 0)
return (-1);
zc.zc_objset_type = DMU_OST_ZVOL;
} else {
zc.zc_objset_type = DMU_OST_ZFS;
}
zc.zc_defer_destroy = defer;
if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0) {
return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
zhp->zfs_name));
}
remove_mountpoint(zhp);
return (0);
}
struct destroydata {
char *snapname;
boolean_t gotone;
boolean_t closezhp;
};
static int
zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
{
struct destroydata *dd = arg;
zfs_handle_t *szhp;
char name[ZFS_MAXNAMELEN];
boolean_t closezhp = dd->closezhp;
int rv = 0;
(void) strlcpy(name, zhp->zfs_name, sizeof (name));
(void) strlcat(name, "@", sizeof (name));
(void) strlcat(name, dd->snapname, sizeof (name));
szhp = make_dataset_handle(zhp->zfs_hdl, name);
if (szhp) {
dd->gotone = B_TRUE;
zfs_close(szhp);
}
if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
(void) zvol_remove_link(zhp->zfs_hdl, name);
/*
* NB: this is simply a best-effort. We don't want to
* return an error, because then we wouldn't visit all
* the volumes.
*/
}
dd->closezhp = B_TRUE;
rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, arg);
if (closezhp)
zfs_close(zhp);
return (rv);
}
/*
* Destroys all snapshots with the given name in zhp & descendants.
*/
int
zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
int ret;
struct destroydata dd = { 0 };
dd.snapname = snapname;
(void) zfs_check_snap_cb(zhp, &dd);
if (!dd.gotone) {
return (zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
zhp->zfs_name, snapname));
}
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
zc.zc_defer_destroy = defer;
ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY_SNAPS, &zc);
if (ret != 0) {
char errbuf[1024];
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot destroy '%s@%s'"), zc.zc_name, snapname);
switch (errno) {
case EEXIST:
zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
"snapshot is cloned"));
return (zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf));
default:
return (zfs_standard_error(zhp->zfs_hdl, errno,
errbuf));
}
}
return (0);
}
/*
* Clones the given dataset. The target must be of the same type as the source.
*/
int
zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
char parent[ZFS_MAXNAMELEN];
int ret;
char errbuf[1024];
libzfs_handle_t *hdl = zhp->zfs_hdl;
zfs_type_t type;
uint64_t zoned;
assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot create '%s'"), target);
/* validate the target name */
if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
/* validate parents exist */
if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
return (-1);
(void) parent_name(target, parent, sizeof (parent));
/* do the clone */
if (ZFS_IS_VOLUME(zhp)) {
zc.zc_objset_type = DMU_OST_ZVOL;
type = ZFS_TYPE_VOLUME;
} else {
zc.zc_objset_type = DMU_OST_ZFS;
type = ZFS_TYPE_FILESYSTEM;
}
if (props) {
if ((props = zfs_valid_proplist(hdl, type, props, zoned,
zhp, errbuf)) == NULL)
return (-1);
if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) {
nvlist_free(props);
return (-1);
}
nvlist_free(props);
}
(void) strlcpy(zc.zc_name, target, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, zhp->zfs_name, sizeof (zc.zc_value));
ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_CREATE, &zc);
zcmd_free_nvlists(&zc);
if (ret != 0) {
switch (errno) {
case ENOENT:
/*
* The parent doesn't exist. We should have caught this
* above, but there may a race condition that has since
* destroyed the parent.
*
* At this point, we don't know whether it's the source
* that doesn't exist anymore, or whether the target
* dataset doesn't exist.
*/
zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
"no such parent '%s'"), parent);
return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
case EXDEV:
zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
"source and target pools differ"));
return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
errbuf));
default:
return (zfs_standard_error(zhp->zfs_hdl, errno,
errbuf));
}
} else if (ZFS_IS_VOLUME(zhp)) {
ret = zvol_create_link(zhp->zfs_hdl, target);
}
return (ret);
}
typedef struct promote_data {
char cb_mountpoint[MAXPATHLEN];
const char *cb_target;
const char *cb_errbuf;
uint64_t cb_pivot_txg;
} promote_data_t;
static int
promote_snap_cb(zfs_handle_t *zhp, void *data)
{
promote_data_t *pd = data;
zfs_handle_t *szhp;
char snapname[MAXPATHLEN];
int rv = 0;
/* We don't care about snapshots after the pivot point */
if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > pd->cb_pivot_txg) {
zfs_close(zhp);
return (0);
}
/* Remove the device link if it's a zvol. */
if (ZFS_IS_VOLUME(zhp))
(void) zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name);
/* Check for conflicting names */
(void) strlcpy(snapname, pd->cb_target, sizeof (snapname));
(void) strlcat(snapname, strchr(zhp->zfs_name, '@'), sizeof (snapname));
szhp = make_dataset_handle(zhp->zfs_hdl, snapname);
if (szhp != NULL) {
zfs_close(szhp);
zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
"snapshot name '%s' from origin \n"
"conflicts with '%s' from target"),
zhp->zfs_name, snapname);
rv = zfs_error(zhp->zfs_hdl, EZFS_EXISTS, pd->cb_errbuf);
}
zfs_close(zhp);
return (rv);
}
static int
promote_snap_done_cb(zfs_handle_t *zhp, void *data)
{
promote_data_t *pd = data;
/* We don't care about snapshots after the pivot point */
if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) <= pd->cb_pivot_txg) {
/* Create the device link if it's a zvol. */
if (ZFS_IS_VOLUME(zhp))
(void) zvol_create_link(zhp->zfs_hdl, zhp->zfs_name);
}
zfs_close(zhp);
return (0);
}
/*
* Promotes the given clone fs to be the clone parent.
*/
int
zfs_promote(zfs_handle_t *zhp)
{
libzfs_handle_t *hdl = zhp->zfs_hdl;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
char parent[MAXPATHLEN];
char *cp;
int ret;
zfs_handle_t *pzhp;
promote_data_t pd;
char errbuf[1024];
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot promote '%s'"), zhp->zfs_name);
if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"snapshots can not be promoted"));
return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
}
(void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
if (parent[0] == '\0') {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"not a cloned filesystem"));
return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
}
cp = strchr(parent, '@');
*cp = '\0';
/* Walk the snapshots we will be moving */
pzhp = zfs_open(hdl, zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT);
if (pzhp == NULL)
return (-1);
pd.cb_pivot_txg = zfs_prop_get_int(pzhp, ZFS_PROP_CREATETXG);
zfs_close(pzhp);
pd.cb_target = zhp->zfs_name;
pd.cb_errbuf = errbuf;
pzhp = zfs_open(hdl, parent, ZFS_TYPE_DATASET);
if (pzhp == NULL)
return (-1);
(void) zfs_prop_get(pzhp, ZFS_PROP_MOUNTPOINT, pd.cb_mountpoint,
sizeof (pd.cb_mountpoint), NULL, NULL, 0, FALSE);
ret = zfs_iter_snapshots(pzhp, promote_snap_cb, &pd);
if (ret != 0) {
zfs_close(pzhp);
return (-1);
}
/* issue the ioctl */
(void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
sizeof (zc.zc_value));
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
if (ret != 0) {
int save_errno = errno;
(void) zfs_iter_snapshots(pzhp, promote_snap_done_cb, &pd);
zfs_close(pzhp);
switch (save_errno) {
case EEXIST:
/*
* There is a conflicting snapshot name. We
* should have caught this above, but they could
* have renamed something in the mean time.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"conflicting snapshot '%s' from parent '%s'"),
zc.zc_string, parent);
return (zfs_error(hdl, EZFS_EXISTS, errbuf));
default:
return (zfs_standard_error(hdl, save_errno, errbuf));
}
} else {
(void) zfs_iter_snapshots(zhp, promote_snap_done_cb, &pd);
}
zfs_close(pzhp);
return (ret);
}
struct createdata {
const char *cd_snapname;
int cd_ifexists;
};
static int
zfs_create_link_cb(zfs_handle_t *zhp, void *arg)
{
struct createdata *cd = arg;
int ret;
if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
char name[MAXPATHLEN];
(void) strlcpy(name, zhp->zfs_name, sizeof (name));
(void) strlcat(name, "@", sizeof (name));
(void) strlcat(name, cd->cd_snapname, sizeof (name));
(void) zvol_create_link_common(zhp->zfs_hdl, name,
cd->cd_ifexists);
/*
* NB: this is simply a best-effort. We don't want to
* return an error, because then we wouldn't visit all
* the volumes.
*/
}
ret = zfs_iter_filesystems(zhp, zfs_create_link_cb, cd);
zfs_close(zhp);
return (ret);
}
/*
* Takes a snapshot of the given dataset.
*/
int
zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
nvlist_t *props)
{
const char *delim;
char parent[ZFS_MAXNAMELEN];
zfs_handle_t *zhp;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
int ret;
char errbuf[1024];
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot snapshot '%s'"), path);
/* validate the target name */
if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
if (props) {
if ((props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
props, B_FALSE, NULL, errbuf)) == NULL)
return (-1);
if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) {
nvlist_free(props);
return (-1);
}
nvlist_free(props);
}
/* make sure the parent exists and is of the appropriate type */
delim = strchr(path, '@');
(void) strncpy(parent, path, delim - path);
parent[delim - path] = '\0';
if ((zhp = zfs_open(hdl, parent, ZFS_TYPE_FILESYSTEM |
ZFS_TYPE_VOLUME)) == NULL) {
zcmd_free_nvlists(&zc);
return (-1);
}
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, delim+1, sizeof (zc.zc_value));
if (ZFS_IS_VOLUME(zhp))
zc.zc_objset_type = DMU_OST_ZVOL;
else
zc.zc_objset_type = DMU_OST_ZFS;
zc.zc_cookie = recursive;
ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SNAPSHOT, &zc);
zcmd_free_nvlists(&zc);
/*
* if it was recursive, the one that actually failed will be in
* zc.zc_name.
*/
if (ret != 0)
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot create snapshot '%s@%s'"), zc.zc_name, zc.zc_value);
if (ret == 0 && recursive) {
struct createdata cd;
cd.cd_snapname = delim + 1;
cd.cd_ifexists = B_FALSE;
(void) zfs_iter_filesystems(zhp, zfs_create_link_cb, &cd);
}
if (ret == 0 && zhp->zfs_type == ZFS_TYPE_VOLUME) {
ret = zvol_create_link(zhp->zfs_hdl, path);
if (ret != 0) {
(void) zfs_standard_error(hdl, errno,
dgettext(TEXT_DOMAIN,
"Volume successfully snapshotted, but device links "
"were not created"));
zfs_close(zhp);
return (-1);
}
}
if (ret != 0)
(void) zfs_standard_error(hdl, errno, errbuf);
zfs_close(zhp);
return (ret);
}
/*
* Destroy any more recent snapshots. We invoke this callback on any dependents
* of the snapshot first. If the 'cb_dependent' member is non-zero, then this
* is a dependent and we should just destroy it without checking the transaction
* group.
*/
typedef struct rollback_data {
const char *cb_target; /* the snapshot */
uint64_t cb_create; /* creation time reference */
boolean_t cb_error;
boolean_t cb_dependent;
boolean_t cb_force;
} rollback_data_t;
static int
rollback_destroy(zfs_handle_t *zhp, void *data)
{
rollback_data_t *cbp = data;
if (!cbp->cb_dependent) {
if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 &&
zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
cbp->cb_create) {
char *logstr;
cbp->cb_dependent = B_TRUE;
cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
rollback_destroy, cbp);
cbp->cb_dependent = B_FALSE;
logstr = zhp->zfs_hdl->libzfs_log_str;
zhp->zfs_hdl->libzfs_log_str = NULL;
cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
zhp->zfs_hdl->libzfs_log_str = logstr;
}
} else {
/* We must destroy this clone; first unmount it */
prop_changelist_t *clp;
clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
cbp->cb_force ? MS_FORCE: 0);
if (clp == NULL || changelist_prefix(clp) != 0) {
cbp->cb_error = B_TRUE;
zfs_close(zhp);
return (0);
}
if (zfs_destroy(zhp, B_FALSE) != 0)
cbp->cb_error = B_TRUE;
else
changelist_remove(clp, zhp->zfs_name);
(void) changelist_postfix(clp);
changelist_free(clp);
}
zfs_close(zhp);
return (0);
}
/*
* Given a dataset, rollback to a specific snapshot, discarding any
* data changes since then and making it the active dataset.
*
* Any snapshots more recent than the target are destroyed, along with
* their dependents.
*/
int
zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
{
rollback_data_t cb = { 0 };
int err;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
boolean_t restore_resv = 0;
uint64_t old_volsize = 0, new_volsize;
zfs_prop_t resv_prop = { 0 };
assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
zhp->zfs_type == ZFS_TYPE_VOLUME);
/*
* Destroy all recent snapshots and its dependends.
*/
cb.cb_force = force;
cb.cb_target = snap->zfs_name;
cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
(void) zfs_iter_children(zhp, rollback_destroy, &cb);
if (cb.cb_error)
return (-1);
/*
* Now that we have verified that the snapshot is the latest,
* rollback to the given snapshot.
*/
if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
if (zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name) != 0)
return (-1);
if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
return (-1);
old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
restore_resv =
(old_volsize == zfs_prop_get_int(zhp, resv_prop));
}
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
if (ZFS_IS_VOLUME(zhp))
zc.zc_objset_type = DMU_OST_ZVOL;
else
zc.zc_objset_type = DMU_OST_ZFS;
/*
* We rely on zfs_iter_children() to verify that there are no
* newer snapshots for the given dataset. Therefore, we can
* simply pass the name on to the ioctl() call. There is still
* an unlikely race condition where the user has taken a
* snapshot since we verified that this was the most recent.
*
*/
if ((err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_ROLLBACK, &zc)) != 0) {
(void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
zhp->zfs_name);
return (err);
}
/*
* For volumes, if the pre-rollback volsize matched the pre-
* rollback reservation and the volsize has changed then set
* the reservation property to the post-rollback volsize.
* Make a new handle since the rollback closed the dataset.
*/
if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
(zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
if ((err = zvol_create_link(zhp->zfs_hdl, zhp->zfs_name))) {
zfs_close(zhp);
return (err);
}
if (restore_resv) {
new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
if (old_volsize != new_volsize)
err = zfs_prop_set_int(zhp, resv_prop,
new_volsize);
}
zfs_close(zhp);
}
return (err);
}
/*
* Iterate over all dependents for a given dataset. This includes both
* hierarchical dependents (children) and data dependents (snapshots and
* clones). The bulk of the processing occurs in get_dependents() in
* libzfs_graph.c.
*/
int
zfs_iter_dependents(zfs_handle_t *zhp, boolean_t allowrecursion,
zfs_iter_f func, void *data)
{
char **dependents;
size_t count;
int i;
zfs_handle_t *child;
int ret = 0;
if (get_dependents(zhp->zfs_hdl, allowrecursion, zhp->zfs_name,
&dependents, &count) != 0)
return (-1);
for (i = 0; i < count; i++) {
if ((child = make_dataset_handle(zhp->zfs_hdl,
dependents[i])) == NULL)
continue;
if ((ret = func(child, data)) != 0)
break;
}
for (i = 0; i < count; i++)
free(dependents[i]);
free(dependents);
return (ret);
}
/*
* Renames the given dataset.
*/
int
zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive)
{
int ret;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
char *delim;
prop_changelist_t *cl = NULL;
zfs_handle_t *zhrp = NULL;
char *parentname = NULL;
char parent[ZFS_MAXNAMELEN];
libzfs_handle_t *hdl = zhp->zfs_hdl;
char errbuf[1024];
/* if we have the same exact name, just return success */
if (strcmp(zhp->zfs_name, target) == 0)
return (0);
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot rename to '%s'"), target);
/*
* Make sure the target name is valid
*/
if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
if ((strchr(target, '@') == NULL) ||
*target == '@') {
/*
* Snapshot target name is abbreviated,
* reconstruct full dataset name
*/
(void) strlcpy(parent, zhp->zfs_name,
sizeof (parent));
delim = strchr(parent, '@');
if (strchr(target, '@') == NULL)
*(++delim) = '\0';
else
*delim = '\0';
(void) strlcat(parent, target, sizeof (parent));
target = parent;
} else {
/*
* Make sure we're renaming within the same dataset.
*/
delim = strchr(target, '@');
if (strncmp(zhp->zfs_name, target, delim - target)
!= 0 || zhp->zfs_name[delim - target] != '@') {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"snapshots must be part of same "
"dataset"));
return (zfs_error(hdl, EZFS_CROSSTARGET,
errbuf));
}
}
if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
} else {
if (recursive) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"recursive rename must be a snapshot"));
return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
}
if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
/* validate parents */
if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
return (-1);
/* make sure we're in the same pool */
verify((delim = strchr(target, '/')) != NULL);
if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
zhp->zfs_name[delim - target] != '/') {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"datasets must be within same pool"));
return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
}
/* new name cannot be a child of the current dataset name */
if (is_descendant(zhp->zfs_name, target)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"New dataset name cannot be a descendant of "
"current dataset name"));
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
}
}
(void) snprintf(errbuf, sizeof (errbuf),
dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
if (getzoneid() == GLOBAL_ZONEID &&
zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"dataset is used in a non-global zone"));
return (zfs_error(hdl, EZFS_ZONED, errbuf));
}
if (recursive) {
struct destroydata dd;
parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
if (parentname == NULL) {
ret = -1;
goto error;
}
delim = strchr(parentname, '@');
*delim = '\0';
zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
if (zhrp == NULL) {
ret = -1;
goto error;
}
dd.snapname = delim + 1;
dd.gotone = B_FALSE;
dd.closezhp = B_TRUE;
/* We remove any zvol links prior to renaming them */
ret = zfs_iter_filesystems(zhrp, zfs_check_snap_cb, &dd);
if (ret) {
goto error;
}
} else {
if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0)) == NULL)
return (-1);
if (changelist_haszonedchild(cl)) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"child dataset with inherited mountpoint is used "
"in a non-global zone"));
(void) zfs_error(hdl, EZFS_ZONED, errbuf);
ret = -1;
goto error;
}
if ((ret = changelist_prefix(cl)) != 0)
goto error;
}
if (ZFS_IS_VOLUME(zhp))
zc.zc_objset_type = DMU_OST_ZVOL;
else
zc.zc_objset_type = DMU_OST_ZFS;
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
zc.zc_cookie = recursive;
if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
/*
* if it was recursive, the one that actually failed will
* be in zc.zc_name
*/
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot rename '%s'"), zc.zc_name);
if (recursive && errno == EEXIST) {
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"a child dataset already has a snapshot "
"with the new name"));
(void) zfs_error(hdl, EZFS_EXISTS, errbuf);
} else {
(void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
}
/*
* On failure, we still want to remount any filesystems that
* were previously mounted, so we don't alter the system state.
*/
if (recursive) {
struct createdata cd;
/* only create links for datasets that had existed */
cd.cd_snapname = delim + 1;
cd.cd_ifexists = B_TRUE;
(void) zfs_iter_filesystems(zhrp, zfs_create_link_cb,
&cd);
} else {
(void) changelist_postfix(cl);
}
} else {
if (recursive) {
struct createdata cd;
/* only create links for datasets that had existed */
cd.cd_snapname = strchr(target, '@') + 1;
cd.cd_ifexists = B_TRUE;
ret = zfs_iter_filesystems(zhrp, zfs_create_link_cb,
&cd);
} else {
changelist_rename(cl, zfs_get_name(zhp), target);
ret = changelist_postfix(cl);
}
}
error:
if (parentname) {
free(parentname);
}
if (zhrp) {
zfs_close(zhrp);
}
if (cl) {
changelist_free(cl);
}
return (ret);
}
/*
* Given a zvol dataset, issue the ioctl to create the appropriate minor node,
* and wait briefly for udev to create the /dev link.
*/
int
zvol_create_link(libzfs_handle_t *hdl, const char *dataset)
{
return (zvol_create_link_common(hdl, dataset, B_FALSE));
}
static int
zvol_create_link_common(libzfs_handle_t *hdl, const char *dataset, int ifexists)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
char path[MAXPATHLEN];
int error;
(void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
/*
* Issue the appropriate ioctl.
*/
if (ioctl(hdl->libzfs_fd, ZFS_IOC_CREATE_MINOR, &zc) != 0) {
switch (errno) {
case EEXIST:
/*
* Silently ignore the case where the link already
* exists. This allows 'zfs volinit' to be run multiple
* times without errors.
*/
return (0);
case ENOENT:
/*
* Dataset does not exist in the kernel. If we
* don't care (see zfs_rename), then ignore the
* error quietly.
*/
if (ifexists) {
return (0);
}
/* FALLTHROUGH */
default:
return (zfs_standard_error_fmt(hdl, errno,
dgettext(TEXT_DOMAIN, "cannot create device links "
"for '%s'"), dataset));
}
}
/*
* Wait up to 10 seconds for udev to create the device.
*/
(void) snprintf(path, sizeof (path), "%s/%s", ZVOL_DIR, dataset);
error = zpool_label_disk_wait(path, 10000);
if (error)
(void) printf(gettext("%s may not be immediately "
"available\n"), path);
return (0);
}
/*
* Remove a minor node for the given zvol and the associated /dev links.
*/
int
zvol_remove_link(libzfs_handle_t *hdl, const char *dataset)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
(void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
if (ioctl(hdl->libzfs_fd, ZFS_IOC_REMOVE_MINOR, &zc) != 0) {
switch (errno) {
case ENXIO:
/*
* Silently ignore the case where the link no longer
* exists, so that 'zfs volfini' can be run multiple
* times without errors.
*/
return (0);
default:
return (zfs_standard_error_fmt(hdl, errno,
dgettext(TEXT_DOMAIN, "cannot remove device "
"links for '%s'"), dataset));
}
}
return (0);
}
nvlist_t *
zfs_get_user_props(zfs_handle_t *zhp)
{
return (zhp->zfs_user_props);
}
/*
* This function is used by 'zfs list' to determine the exact set of columns to
* display, and their maximum widths. This does two main things:
*
* - If this is a list of all properties, then expand the list to include
* all native properties, and set a flag so that for each dataset we look
* for new unique user properties and add them to the list.
*
* - For non fixed-width properties, keep track of the maximum width seen
* so that we can size the column appropriately. If the user has
* requested received property values, we also need to compute the width
* of the RECEIVED column.
*/
int
zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received)
{
libzfs_handle_t *hdl = zhp->zfs_hdl;
zprop_list_t *entry;
zprop_list_t **last, **start;
nvlist_t *userprops, *propval;
nvpair_t *elem;
char *strval;
char buf[ZFS_MAXPROPLEN];
if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
return (-1);
userprops = zfs_get_user_props(zhp);
entry = *plp;
if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
/*
* Go through and add any user properties as necessary. We
* start by incrementing our list pointer to the first
* non-native property.
*/
start = plp;
while (*start != NULL) {
if ((*start)->pl_prop == ZPROP_INVAL)
break;
start = &(*start)->pl_next;
}
elem = NULL;
while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
/*
* See if we've already found this property in our list.
*/
for (last = start; *last != NULL;
last = &(*last)->pl_next) {
if (strcmp((*last)->pl_user_prop,
nvpair_name(elem)) == 0)
break;
}
if (*last == NULL) {
if ((entry = zfs_alloc(hdl,
sizeof (zprop_list_t))) == NULL ||
((entry->pl_user_prop = zfs_strdup(hdl,
nvpair_name(elem)))) == NULL) {
free(entry);
return (-1);
}
entry->pl_prop = ZPROP_INVAL;
entry->pl_width = strlen(nvpair_name(elem));
entry->pl_all = B_TRUE;
*last = entry;
}
}
}
/*
* Now go through and check the width of any non-fixed columns
*/
for (entry = *plp; entry != NULL; entry = entry->pl_next) {
if (entry->pl_fixed)
continue;
if (entry->pl_prop != ZPROP_INVAL) {
if (zfs_prop_get(zhp, entry->pl_prop,
buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) {
if (strlen(buf) > entry->pl_width)
entry->pl_width = strlen(buf);
}
if (received && zfs_prop_get_recvd(zhp,
zfs_prop_to_name(entry->pl_prop),
buf, sizeof (buf), B_FALSE) == 0)
if (strlen(buf) > entry->pl_recvd_width)
entry->pl_recvd_width = strlen(buf);
} else {
if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
&propval) == 0) {
verify(nvlist_lookup_string(propval,
ZPROP_VALUE, &strval) == 0);
if (strlen(strval) > entry->pl_width)
entry->pl_width = strlen(strval);
}
if (received && zfs_prop_get_recvd(zhp,
entry->pl_user_prop,
buf, sizeof (buf), B_FALSE) == 0)
if (strlen(buf) > entry->pl_recvd_width)
entry->pl_recvd_width = strlen(buf);
}
}
return (0);
}
void
zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
{
nvpair_t *curr;
/*
* Keep a reference to the props-table against which we prune the
* properties.
*/
zhp->zfs_props_table = props;
curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
while (curr) {
zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
/*
* User properties will result in ZPROP_INVAL, and since we
* only know how to prune standard ZFS properties, we always
* leave these in the list. This can also happen if we
* encounter an unknown DSL property (when running older
* software, for example).
*/
if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
(void) nvlist_remove(zhp->zfs_props,
nvpair_name(curr), nvpair_type(curr));
curr = next;
}
}
static int
zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
nvlist_t *nvlist = NULL;
int error;
(void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
zc.zc_cookie = (uint64_t)cmd;
if (cmd == ZFS_SMB_ACL_RENAME) {
if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
(void) no_memory(hdl);
return (-1);
}
}
switch (cmd) {
case ZFS_SMB_ACL_ADD:
case ZFS_SMB_ACL_REMOVE:
(void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
break;
case ZFS_SMB_ACL_RENAME:
if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
resource1) != 0) {
(void) no_memory(hdl);
return (-1);
}
if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
resource2) != 0) {
(void) no_memory(hdl);
return (-1);
}
if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
nvlist_free(nvlist);
return (-1);
}
break;
case ZFS_SMB_ACL_PURGE:
break;
default:
return (-1);
}
error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
if (nvlist)
nvlist_free(nvlist);
return (error);
}
int
zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
char *path, char *resource)
{
return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
resource, NULL));
}
int
zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
char *path, char *resource)
{
return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
resource, NULL));
}
int
zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
{
return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
NULL, NULL));
}
int
zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
char *oldname, char *newname)
{
return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
oldname, newname));
}
int
zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
zfs_userspace_cb_t func, void *arg)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
int error;
zfs_useracct_t buf[100];
(void) strncpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
zc.zc_objset_type = type;
zc.zc_nvlist_dst = (uintptr_t)buf;
/* CONSTCOND */
while (1) {
zfs_useracct_t *zua = buf;
zc.zc_nvlist_dst_size = sizeof (buf);
error = ioctl(zhp->zfs_hdl->libzfs_fd,
ZFS_IOC_USERSPACE_MANY, &zc);
if (error || zc.zc_nvlist_dst_size == 0)
break;
while (zc.zc_nvlist_dst_size > 0) {
error = func(arg, zua->zu_domain, zua->zu_rid,
zua->zu_space);
if (error != 0)
return (error);
zua++;
zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
}
}
return (error);
}
int
zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
boolean_t recursive, boolean_t temphold, boolean_t enoent_ok,
int cleanup_fd, uint64_t dsobj, uint64_t createtxg)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
libzfs_handle_t *hdl = zhp->zfs_hdl;
ASSERT(!recursive || dsobj == 0);
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string))
>= sizeof (zc.zc_string))
return (zfs_error(hdl, EZFS_TAGTOOLONG, tag));
zc.zc_cookie = recursive;
zc.zc_temphold = temphold;
zc.zc_cleanup_fd = cleanup_fd;
zc.zc_sendobj = dsobj;
zc.zc_createtxg = createtxg;
if (zfs_ioctl(hdl, ZFS_IOC_HOLD, &zc) != 0) {
char errbuf[ZFS_MAXNAMELEN+32];
/*
* if it was recursive, the one that actually failed will be in
* zc.zc_name.
*/
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot hold '%s@%s'"), zc.zc_name, snapname);
switch (errno) {
case E2BIG:
/*
* Temporary tags wind up having the ds object id
* prepended. So even if we passed the length check
* above, it's still possible for the tag to wind
* up being slightly too long.
*/
return (zfs_error(hdl, EZFS_TAGTOOLONG, errbuf));
case ENOTSUP:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool must be upgraded"));
return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
case EINVAL:
return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
case EEXIST:
return (zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf));
case ENOENT:
if (enoent_ok)
return (ENOENT);
/* FALLTHROUGH */
default:
return (zfs_standard_error_fmt(hdl, errno, errbuf));
}
}
return (0);
}
int
zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
boolean_t recursive)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
libzfs_handle_t *hdl = zhp->zfs_hdl;
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
(void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string))
>= sizeof (zc.zc_string))
return (zfs_error(hdl, EZFS_TAGTOOLONG, tag));
zc.zc_cookie = recursive;
if (zfs_ioctl(hdl, ZFS_IOC_RELEASE, &zc) != 0) {
char errbuf[ZFS_MAXNAMELEN+32];
/*
* if it was recursive, the one that actually failed will be in
* zc.zc_name.
*/
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot release '%s' from '%s@%s'"), tag, zc.zc_name,
snapname);
switch (errno) {
case ESRCH:
return (zfs_error(hdl, EZFS_REFTAG_RELE, errbuf));
case ENOTSUP:
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"pool must be upgraded"));
return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
case EINVAL:
return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
default:
return (zfs_standard_error_fmt(hdl, errno, errbuf));
}
}
return (0);
}
uint64_t
zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
{
uint64_t numdb;
uint64_t nblocks, volblocksize;
int ncopies;
char *strval;
if (nvlist_lookup_string(props,
zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
ncopies = atoi(strval);
else
ncopies = 1;
if (nvlist_lookup_uint64(props,
zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
&volblocksize) != 0)
volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
nblocks = volsize/volblocksize;
/* start with metadnode L0-L6 */
numdb = 7;
/* calculate number of indirects */
while (nblocks > 1) {
nblocks += DNODES_PER_LEVEL - 1;
nblocks /= DNODES_PER_LEVEL;
numdb += nblocks;
}
numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
volsize *= ncopies;
/*
* this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
* compressed, but in practice they compress down to about
* 1100 bytes
*/
numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
volsize += numdb;
return (volsize);
}
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