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Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
8fc91fd8 SW |
2 | |
3 | #include <linux/err.h> | |
4 | #include <linux/sched.h> | |
5 | #include <linux/types.h> | |
6 | #include <linux/vmalloc.h> | |
7 | ||
3d14c5d2 | 8 | #include <linux/ceph/msgpool.h> |
8fc91fd8 | 9 | |
5185352c | 10 | static void *msgpool_alloc(gfp_t gfp_mask, void *arg) |
d52f847a SW |
11 | { |
12 | struct ceph_msgpool *pool = arg; | |
5185352c | 13 | struct ceph_msg *msg; |
8fc91fd8 | 14 | |
b61c2763 | 15 | msg = ceph_msg_new(0, pool->front_len, gfp_mask, true); |
5185352c SW |
16 | if (!msg) { |
17 | dout("msgpool_alloc %s failed\n", pool->name); | |
18 | } else { | |
19 | dout("msgpool_alloc %s %p\n", pool->name, msg); | |
20 | msg->pool = pool; | |
21 | } | |
22 | return msg; | |
d52f847a | 23 | } |
8fc91fd8 | 24 | |
5185352c | 25 | static void msgpool_free(void *element, void *arg) |
8fc91fd8 | 26 | { |
5185352c SW |
27 | struct ceph_msgpool *pool = arg; |
28 | struct ceph_msg *msg = element; | |
29 | ||
30 | dout("msgpool_release %s %p\n", pool->name, msg); | |
31 | msg->pool = NULL; | |
32 | ceph_msg_put(msg); | |
8fc91fd8 SW |
33 | } |
34 | ||
35 | int ceph_msgpool_init(struct ceph_msgpool *pool, | |
4f48280e | 36 | int front_len, int size, bool blocking, const char *name) |
8fc91fd8 | 37 | { |
5185352c | 38 | dout("msgpool %s init\n", name); |
8fc91fd8 | 39 | pool->front_len = front_len; |
5185352c | 40 | pool->pool = mempool_create(size, msgpool_alloc, msgpool_free, pool); |
d52f847a SW |
41 | if (!pool->pool) |
42 | return -ENOMEM; | |
4f48280e | 43 | pool->name = name; |
d52f847a | 44 | return 0; |
8fc91fd8 SW |
45 | } |
46 | ||
47 | void ceph_msgpool_destroy(struct ceph_msgpool *pool) | |
48 | { | |
5185352c | 49 | dout("msgpool %s destroy\n", pool->name); |
d52f847a | 50 | mempool_destroy(pool->pool); |
8fc91fd8 SW |
51 | } |
52 | ||
d52f847a SW |
53 | struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, |
54 | int front_len) | |
8fc91fd8 | 55 | { |
5185352c SW |
56 | struct ceph_msg *msg; |
57 | ||
d52f847a | 58 | if (front_len > pool->front_len) { |
5185352c | 59 | dout("msgpool_get %s need front %d, pool size is %d\n", |
4f48280e | 60 | pool->name, front_len, pool->front_len); |
8f3bc053 SW |
61 | WARN_ON(1); |
62 | ||
63 | /* try to alloc a fresh message */ | |
b61c2763 | 64 | return ceph_msg_new(0, front_len, GFP_NOFS, false); |
8f3bc053 SW |
65 | } |
66 | ||
5185352c SW |
67 | msg = mempool_alloc(pool->pool, GFP_NOFS); |
68 | dout("msgpool_get %s %p\n", pool->name, msg); | |
69 | return msg; | |
8fc91fd8 SW |
70 | } |
71 | ||
72 | void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg) | |
73 | { | |
5185352c SW |
74 | dout("msgpool_put %s %p\n", pool->name, msg); |
75 | ||
d52f847a SW |
76 | /* reset msg front_len; user may have changed it */ |
77 | msg->front.iov_len = pool->front_len; | |
78 | msg->hdr.front_len = cpu_to_le32(pool->front_len); | |
3ca02ef9 | 79 | |
d52f847a | 80 | kref_init(&msg->kref); /* retake single ref */ |
5185352c | 81 | mempool_free(msg, pool->pool); |
8fc91fd8 | 82 | } |