LXR linux/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 */
  11struct 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
  18extern int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
  19                             int front_len, int size, bool blocking,
  20                             const char *name);
  21extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
  22extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *,
  23                                         int front_len);
  24extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
  25
  26#endif
  27