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Commit | Line | Data |
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8fc91fd8 SW |
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 | ||
d52f847a SW |
10 | static void *alloc_fn(gfp_t gfp_mask, void *arg) |
11 | { | |
12 | struct ceph_msgpool *pool = arg; | |
8fc91fd8 | 13 | |
bb257664 | 14 | return ceph_msg_new(0, pool->front_len); |
d52f847a | 15 | } |
8fc91fd8 | 16 | |
d52f847a | 17 | static void free_fn(void *element, void *arg) |
8fc91fd8 | 18 | { |
d52f847a | 19 | ceph_msg_put(element); |
8fc91fd8 SW |
20 | } |
21 | ||
22 | int ceph_msgpool_init(struct ceph_msgpool *pool, | |
d52f847a | 23 | int front_len, int size, bool blocking) |
8fc91fd8 | 24 | { |
8fc91fd8 | 25 | pool->front_len = front_len; |
d52f847a SW |
26 | pool->pool = mempool_create(size, alloc_fn, free_fn, pool); |
27 | if (!pool->pool) | |
28 | return -ENOMEM; | |
29 | return 0; | |
8fc91fd8 SW |
30 | } |
31 | ||
32 | void ceph_msgpool_destroy(struct ceph_msgpool *pool) | |
33 | { | |
d52f847a | 34 | mempool_destroy(pool->pool); |
8fc91fd8 SW |
35 | } |
36 | ||
d52f847a SW |
37 | struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, |
38 | int front_len) | |
8fc91fd8 | 39 | { |
d52f847a | 40 | if (front_len > pool->front_len) { |
8f3bc053 SW |
41 | pr_err("msgpool_get pool %p need front %d, pool size is %d\n", |
42 | pool, front_len, pool->front_len); | |
43 | WARN_ON(1); | |
44 | ||
45 | /* try to alloc a fresh message */ | |
bb257664 | 46 | return ceph_msg_new(0, front_len); |
8f3bc053 SW |
47 | } |
48 | ||
d52f847a | 49 | return mempool_alloc(pool->pool, GFP_NOFS); |
8fc91fd8 SW |
50 | } |
51 | ||
52 | void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg) | |
53 | { | |
d52f847a SW |
54 | /* reset msg front_len; user may have changed it */ |
55 | msg->front.iov_len = pool->front_len; | |
56 | msg->hdr.front_len = cpu_to_le32(pool->front_len); | |
3ca02ef9 | 57 | |
d52f847a | 58 | kref_init(&msg->kref); /* retake single ref */ |
8fc91fd8 | 59 | } |