Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[platform/adaptation/renesas_rcar/renesas_kernel.git] / include / linux / ceph / msgpool.h
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  */
11 struct 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
18 extern int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
19                              int front_len, int size, bool blocking,
20                              const char *name);
21 extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
22 extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *,
23                                          int front_len);
24 extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
25
26 #endif