Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1 | #include "ceph_debug.h" |
| 2 | |
| 3 | #include <linux/err.h> |
| 4 | #include <linux/sched.h> |
| 5 | #include <linux/types.h> |
| 6 | #include <linux/vmalloc.h> |
| 7 | |
| 8 | #include "msgpool.h" |
| 9 | |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 10 | static void *alloc_fn(gfp_t gfp_mask, void *arg) |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 11 | { |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 12 | struct ceph_msgpool *pool = arg; |
| 13 | struct ceph_msg *m; |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 14 | |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 15 | m = ceph_msg_new(0, pool->front_len, 0, 0, NULL); |
| 16 | if (IS_ERR(m)) |
| 17 | return NULL; |
| 18 | return m; |
| 19 | } |
| 20 | |
| 21 | static void free_fn(void *element, void *arg) |
| 22 | { |
| 23 | ceph_msg_put(element); |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 24 | } |
| 25 | |
| 26 | int ceph_msgpool_init(struct ceph_msgpool *pool, |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 27 | int front_len, int size, bool blocking) |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 28 | { |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 29 | pool->front_len = front_len; |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 30 | pool->pool = mempool_create(size, alloc_fn, free_fn, pool); |
| 31 | if (!pool->pool) |
| 32 | return -ENOMEM; |
| 33 | return 0; |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | void ceph_msgpool_destroy(struct ceph_msgpool *pool) |
| 37 | { |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 38 | mempool_destroy(pool->pool); |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 39 | } |
| 40 | |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 41 | struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, |
| 42 | int front_len) |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 43 | { |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 44 | if (front_len > pool->front_len) { |
| 45 | struct ceph_msg *msg; |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 46 | |
Sage Weil | 8f3bc05 | 2009-10-14 17:36:07 -0700 | [diff] [blame] | 47 | pr_err("msgpool_get pool %p need front %d, pool size is %d\n", |
| 48 | pool, front_len, pool->front_len); |
| 49 | WARN_ON(1); |
| 50 | |
| 51 | /* try to alloc a fresh message */ |
| 52 | msg = ceph_msg_new(0, front_len, 0, 0, NULL); |
| 53 | if (!IS_ERR(msg)) |
| 54 | return msg; |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 55 | return NULL; |
Sage Weil | 8f3bc05 | 2009-10-14 17:36:07 -0700 | [diff] [blame] | 56 | } |
| 57 | |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 58 | return mempool_alloc(pool->pool, GFP_NOFS); |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg) |
| 62 | { |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 63 | /* reset msg front_len; user may have changed it */ |
| 64 | msg->front.iov_len = pool->front_len; |
| 65 | msg->hdr.front_len = cpu_to_le32(pool->front_len); |
Sage Weil | 3ca02ef | 2010-03-01 15:25:00 -0800 | [diff] [blame] | 66 | |
Sage Weil | d52f847 | 2010-04-01 15:23:14 -0700 | [diff] [blame^] | 67 | kref_init(&msg->kref); /* retake single ref */ |
Sage Weil | 8fc91fd | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 68 | } |