Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _FS_CEPH_MSGPOOL
2#define _FS_CEPH_MSGPOOL
3
4#include "messenger.h"
5
6/*
7 * we use memory pools for preallocating messages we may receive, to
8 * avoid unexpected OOM conditions.
9 */
10struct ceph_msgpool {
11 spinlock_t lock;
12 int front_len; /* preallocated payload size */
13 struct list_head msgs; /* msgs in the pool; each has 1 ref */
14 int num, min; /* cur, min # msgs in the pool */
15 bool blocking;
16 wait_queue_head_t wait;
17};
18
19extern int ceph_msgpool_init(struct ceph_msgpool *pool,
20 int front_len, int size, bool blocking);
21extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
22extern int ceph_msgpool_resv(struct ceph_msgpool *, int delta);
23extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *,
24 int front_len);
25extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
26
27#endif