| Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame^] | 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 | */ |
| 10 | struct 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 | |
| 19 | extern int ceph_msgpool_init(struct ceph_msgpool *pool, |
| 20 | int front_len, int size, bool blocking); |
| 21 | extern void ceph_msgpool_destroy(struct ceph_msgpool *pool); |
| 22 | extern int ceph_msgpool_resv(struct ceph_msgpool *, int delta); |
| 23 | extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *); |
| 24 | extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *); |
| 25 | |
| 26 | #endif |