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 */
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 int max_data_items;
17 };
18
19 int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
20 int front_len, int max_data_items, int size,
21 const char *name);
22 extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
23 struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, int front_len,
24 int max_data_items);
25 extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
26
27 #endif
28
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