include/linux/ceph/msgpool.h

   1 #ifndef _FS_CEPH_MSGPOOL
   2 #define _FS_CEPH_MSGPOOL
   3
   4 #include <linux/mempool.h>
   5
   6 /*
   7  * we use memory pools for preallocating messages we may receive, to
   8  * avoid unexpected OOM conditions.
   9  */
  10 struct ceph_msgpool {
  11         const char *name;
  12         mempool_t *pool;
  13         int type;               /* preallocated message type */
  14         int front_len;          /* preallocated payload size */
  15 };
  16
  17 extern int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
  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