| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2 | #ifndef _FS_CEPH_MSGPOOL |
| 3 | #define _FS_CEPH_MSGPOOL |
| 4 | |
| Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame] | 5 | #include <linux/mempool.h> |
| Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 6 | |
| 7 | /* |
| 8 | * we use memory pools for preallocating messages we may receive, to |
| 9 | * avoid unexpected OOM conditions. |
| 10 | */ |
| 11 | struct ceph_msgpool { |
| Sage Weil | 4f48280 | 2010-04-24 09:56:35 -0700 | [diff] [blame] | 12 | const char *name; |
| Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame] | 13 | mempool_t *pool; |
| Sage Weil | d50b409 | 2012-07-09 14:22:34 -0700 | [diff] [blame] | 14 | int type; /* preallocated message type */ |
| Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 15 | int front_len; /* preallocated payload size */ |
| Ilya Dryomov | 0d9c1ab | 2018-10-15 17:38:23 +0200 | [diff] [blame] | 16 | int max_data_items; |
| Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 17 | }; |
| 18 | |
| Ilya Dryomov | 0d9c1ab | 2018-10-15 17:38:23 +0200 | [diff] [blame] | 19 | int ceph_msgpool_init(struct ceph_msgpool *pool, int type, |
| 20 | int front_len, int max_data_items, int size, |
| 21 | const char *name); |
| Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 22 | extern void ceph_msgpool_destroy(struct ceph_msgpool *pool); |
| Ilya Dryomov | 0d9c1ab | 2018-10-15 17:38:23 +0200 | [diff] [blame] | 23 | struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, int front_len, |
| 24 | int max_data_items); |
| Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 25 | extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *); |
| 26 | |
| 27 | #endif |
