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