83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2018 Facebook
|
|
*
|
|
* This file is part of libbtrfsutil.
|
|
*
|
|
* libbtrfsutil is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* libbtrfsutil is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "btrfsutil_internal.h"
|
|
|
|
PUBLIC enum btrfs_util_error btrfs_util_create_qgroup_inherit(int flags,
|
|
struct btrfs_util_qgroup_inherit **ret)
|
|
{
|
|
struct btrfs_qgroup_inherit *inherit;
|
|
|
|
if (flags) {
|
|
errno = EINVAL;
|
|
return BTRFS_UTIL_ERROR_INVALID_ARGUMENT;
|
|
}
|
|
|
|
inherit = calloc(1, sizeof(*inherit));
|
|
if (!inherit)
|
|
return BTRFS_UTIL_ERROR_NO_MEMORY;
|
|
|
|
/*
|
|
* struct btrfs_util_qgroup_inherit is a lie; it's actually struct
|
|
* btrfs_qgroup_inherit, but we abstract it away so that users don't
|
|
* need to depend on the Btrfs UAPI headers.
|
|
*/
|
|
*ret = (struct btrfs_util_qgroup_inherit *)inherit;
|
|
|
|
return BTRFS_UTIL_OK;
|
|
}
|
|
|
|
PUBLIC void btrfs_util_destroy_qgroup_inherit(struct btrfs_util_qgroup_inherit *inherit)
|
|
{
|
|
free(inherit);
|
|
}
|
|
|
|
PUBLIC enum btrfs_util_error btrfs_util_qgroup_inherit_add_group(struct btrfs_util_qgroup_inherit **inherit,
|
|
uint64_t qgroupid)
|
|
{
|
|
struct btrfs_qgroup_inherit *tmp = (struct btrfs_qgroup_inherit *)*inherit;
|
|
|
|
tmp = realloc(tmp, sizeof(*tmp) +
|
|
(tmp->num_qgroups + 1) * sizeof(tmp->qgroups[0]));
|
|
if (!tmp)
|
|
return BTRFS_UTIL_ERROR_NO_MEMORY;
|
|
|
|
tmp->qgroups[tmp->num_qgroups++] = qgroupid;
|
|
|
|
*inherit = (struct btrfs_util_qgroup_inherit *)tmp;
|
|
|
|
return BTRFS_UTIL_OK;
|
|
}
|
|
|
|
PUBLIC void btrfs_util_qgroup_inherit_get_groups(const struct btrfs_util_qgroup_inherit *inherit,
|
|
const uint64_t **groups,
|
|
size_t *n)
|
|
{
|
|
struct btrfs_qgroup_inherit *tmp = (struct btrfs_qgroup_inherit *)inherit;
|
|
|
|
/* Need to cast because __u64 != uint64_t. */
|
|
*groups = (const uint64_t *)&tmp->qgroups[0];
|
|
*n = tmp->num_qgroups;
|
|
}
|