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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) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
*/
#include <sys/zfs_ioctl.h>
#include <zfs_ioctl_compat.h>
#include "libzfs_core_compat.h"
extern int zfs_ioctl_version;
int
lzc_compat_pre(zfs_cmd_t *zc, zfs_ioc_t *ioc, nvlist_t **source)
{
nvlist_t *nvl = NULL;
nvpair_t *pair, *hpair;
char *buf, *val;
zfs_ioc_t vecnum;
uint32_t type32;
int32_t cleanup_fd;
int error = 0;
int pos;
if (zfs_ioctl_version >= ZFS_IOCVER_LZC)
return (0);
vecnum = *ioc;
switch (vecnum) {
case ZFS_IOC_CREATE:
type32 = fnvlist_lookup_int32(*source, "type");
zc->zc_objset_type = (uint64_t)type32;
nvlist_lookup_nvlist(*source, "props", &nvl);
*source = nvl;
break;
case ZFS_IOC_CLONE:
buf = fnvlist_lookup_string(*source, "origin");
strlcpy(zc->zc_value, buf, MAXPATHLEN);
nvlist_lookup_nvlist(*source, "props", &nvl);
*ioc = ZFS_IOC_CREATE;
*source = nvl;
break;
case ZFS_IOC_SNAPSHOT:
nvl = fnvlist_lookup_nvlist(*source, "snaps");
pair = nvlist_next_nvpair(nvl, NULL);
if (pair != NULL) {
buf = nvpair_name(pair);
pos = strcspn(buf, "@");
strlcpy(zc->zc_name, buf, pos + 1);
strlcpy(zc->zc_value, buf + pos + 1, MAXPATHLEN);
} else
error = EINVAL;
/* old kernel cannot create multiple snapshots */
if (!error && nvlist_next_nvpair(nvl, pair) != NULL)
error = EOPNOTSUPP;
nvlist_free(nvl);
nvl = NULL;
nvlist_lookup_nvlist(*source, "props", &nvl);
*source = nvl;
break;
case ZFS_IOC_SPACE_SNAPS:
buf = fnvlist_lookup_string(*source, "firstsnap");
strlcpy(zc->zc_value, buf, MAXPATHLEN);
break;
case ZFS_IOC_DESTROY_SNAPS:
nvl = fnvlist_lookup_nvlist(*source, "snaps");
pair = nvlist_next_nvpair(nvl, NULL);
if (pair != NULL) {
buf = nvpair_name(pair);
pos = strcspn(buf, "@");
strlcpy(zc->zc_name, buf, pos + 1);
} else
error = EINVAL;
/* old kernel cannot atomically destroy multiple snaps */
if (!error && nvlist_next_nvpair(nvl, pair) != NULL)
error = EOPNOTSUPP;
*source = nvl;
break;
case ZFS_IOC_HOLD:
nvl = fnvlist_lookup_nvlist(*source, "holds");
pair = nvlist_next_nvpair(nvl, NULL);
if (pair != NULL) {
buf = nvpair_name(pair);
pos = strcspn(buf, "@");
strlcpy(zc->zc_name, buf, pos + 1);
strlcpy(zc->zc_value, buf + pos + 1, MAXPATHLEN);
if (nvpair_value_string(pair, &val) == 0)
strlcpy(zc->zc_string, val, MAXNAMELEN);
else
error = EINVAL;
} else
error = EINVAL;
/* old kernel cannot atomically create multiple holds */
if (!error && nvlist_next_nvpair(nvl, pair) != NULL)
error = EOPNOTSUPP;
nvlist_free(nvl);
if (nvlist_lookup_int32(*source, "cleanup_fd",
&cleanup_fd) == 0)
zc->zc_cleanup_fd = cleanup_fd;
else
zc->zc_cleanup_fd = -1;
break;
case ZFS_IOC_RELEASE:
pair = nvlist_next_nvpair(*source, NULL);
if (pair != NULL) {
buf = nvpair_name(pair);
pos = strcspn(buf, "@");
strlcpy(zc->zc_name, buf, pos + 1);
strlcpy(zc->zc_value, buf + pos + 1, MAXPATHLEN);
if (nvpair_value_nvlist(pair, &nvl) == 0) {
hpair = nvlist_next_nvpair(nvl, NULL);
if (hpair != NULL)
strlcpy(zc->zc_string,
nvpair_name(hpair), MAXNAMELEN);
else
error = EINVAL;
if (!error && nvlist_next_nvpair(nvl,
hpair) != NULL)
error = EOPNOTSUPP;
} else
error = EINVAL;
} else
error = EINVAL;
/* old kernel cannot atomically release multiple holds */
if (!error && nvlist_next_nvpair(nvl, pair) != NULL)
error = EOPNOTSUPP;
break;
}
return (error);
}
void
lzc_compat_post(zfs_cmd_t *zc, const zfs_ioc_t ioc)
{
if (zfs_ioctl_version >= ZFS_IOCVER_LZC)
return;
switch (ioc) {
case ZFS_IOC_CREATE:
case ZFS_IOC_CLONE:
case ZFS_IOC_SNAPSHOT:
case ZFS_IOC_SPACE_SNAPS:
case ZFS_IOC_DESTROY_SNAPS:
zc->zc_nvlist_dst_filled = B_FALSE;
break;
}
}
int
lzc_compat_outnvl(zfs_cmd_t *zc, const zfs_ioc_t ioc, nvlist_t **outnvl)
{
nvlist_t *nvl;
if (zfs_ioctl_version >= ZFS_IOCVER_LZC)
return (0);
switch (ioc) {
case ZFS_IOC_SPACE_SNAPS:
nvl = fnvlist_alloc();
fnvlist_add_uint64(nvl, "used", zc->zc_cookie);
fnvlist_add_uint64(nvl, "compressed", zc->zc_objset_type);
fnvlist_add_uint64(nvl, "uncompressed", zc->zc_perm_action);
*outnvl = nvl;
break;
}
return (0);
}
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