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