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/*
* 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 3 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;
}
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