root/include/linux/ceph/msgpool.h

INCLUDED FROM

   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