1#ifndef _FS_CEPH_MSGPOOL
2#define _FS_CEPH_MSGPOOL
3
4#include <linux/mempool.h>
5#include <linux/ceph/messenger.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};
17
18extern int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
19			     int front_len, int size, bool blocking,
20			     const char *name);
21extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
22extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *,
23					 int front_len);
24extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
25
26#endif
27