83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
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/*
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* Copyright (C) 2018 Facebook
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*
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* This file is part of libbtrfsutil.
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*
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* libbtrfsutil is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* libbtrfsutil is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include "btrfsutil_internal.h"
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PUBLIC enum btrfs_util_error btrfs_util_create_qgroup_inherit(int flags,
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struct btrfs_util_qgroup_inherit **ret)
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{
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struct btrfs_qgroup_inherit *inherit;
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if (flags) {
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errno = EINVAL;
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return BTRFS_UTIL_ERROR_INVALID_ARGUMENT;
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}
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inherit = calloc(1, sizeof(*inherit));
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if (!inherit)
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return BTRFS_UTIL_ERROR_NO_MEMORY;
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/*
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* struct btrfs_util_qgroup_inherit is a lie; it's actually struct
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* btrfs_qgroup_inherit, but we abstract it away so that users don't
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* need to depend on the Btrfs UAPI headers.
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*/
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*ret = (struct btrfs_util_qgroup_inherit *)inherit;
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return BTRFS_UTIL_OK;
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}
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PUBLIC void btrfs_util_destroy_qgroup_inherit(struct btrfs_util_qgroup_inherit *inherit)
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{
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free(inherit);
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}
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PUBLIC enum btrfs_util_error btrfs_util_qgroup_inherit_add_group(struct btrfs_util_qgroup_inherit **inherit,
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uint64_t qgroupid)
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{
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struct btrfs_qgroup_inherit *tmp = (struct btrfs_qgroup_inherit *)*inherit;
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tmp = realloc(tmp, sizeof(*tmp) +
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(tmp->num_qgroups + 1) * sizeof(tmp->qgroups[0]));
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if (!tmp)
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return BTRFS_UTIL_ERROR_NO_MEMORY;
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tmp->qgroups[tmp->num_qgroups++] = qgroupid;
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*inherit = (struct btrfs_util_qgroup_inherit *)tmp;
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return BTRFS_UTIL_OK;
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}
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PUBLIC void btrfs_util_qgroup_inherit_get_groups(const struct btrfs_util_qgroup_inherit *inherit,
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const uint64_t **groups,
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size_t *n)
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{
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struct btrfs_qgroup_inherit *tmp = (struct btrfs_qgroup_inherit *)inherit;
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/* Need to cast because __u64 != uint64_t. */
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*groups = (const uint64_t *)&tmp->qgroups[0];
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*n = tmp->num_qgroups;
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}
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