1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _FS_CEPH_MSGPOOL
3#define _FS_CEPH_MSGPOOL
4
5#include <linux/mempool.h>
6
7/*
8 * we use memory pools for preallocating messages we may receive, to
9 * avoid unexpected OOM conditions.
10 */
11struct ceph_msgpool {
12	const char *name;
13	mempool_t *pool;
14	int type;               /* preallocated message type */
15	int front_len;          /* preallocated payload size */
16	int max_data_items;
17};
18
19int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
20		      int front_len, int max_data_items, int size,
21		      const char *name);
22extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
23struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, int front_len,
24				  int max_data_items);
25extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
26
27#endif
28