forked from Minki/linux
8f3bc053c6
Pass the front_len we need when pulling a message off a msgpool, and WARN if it is greater than the pool's size. Then try to allocate a new message (to continue without failing). Signed-off-by: Sage Weil <sage@newdream.net>
28 lines
848 B
C
28 lines
848 B
C
#ifndef _FS_CEPH_MSGPOOL
|
|
#define _FS_CEPH_MSGPOOL
|
|
|
|
#include "messenger.h"
|
|
|
|
/*
|
|
* we use memory pools for preallocating messages we may receive, to
|
|
* avoid unexpected OOM conditions.
|
|
*/
|
|
struct ceph_msgpool {
|
|
spinlock_t lock;
|
|
int front_len; /* preallocated payload size */
|
|
struct list_head msgs; /* msgs in the pool; each has 1 ref */
|
|
int num, min; /* cur, min # msgs in the pool */
|
|
bool blocking;
|
|
wait_queue_head_t wait;
|
|
};
|
|
|
|
extern int ceph_msgpool_init(struct ceph_msgpool *pool,
|
|
int front_len, int size, bool blocking);
|
|
extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
|
|
extern int ceph_msgpool_resv(struct ceph_msgpool *, int delta);
|
|
extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *,
|
|
int front_len);
|
|
extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
|
|
|
|
#endif
|