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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 | ||
b2aa5d0b | 8 | #include <linux/ceph/messenger.h> |
3d14c5d2 | 9 | #include <linux/ceph/msgpool.h> |
8fc91fd8 | 10 | |
5185352c | 11 | static void *msgpool_alloc(gfp_t gfp_mask, void *arg) |
d52f847a SW |
12 | { |
13 | struct ceph_msgpool *pool = arg; | |
5185352c | 14 | struct ceph_msg *msg; |
8fc91fd8 | 15 | |
d50b409f | 16 | msg = ceph_msg_new(pool->type, pool->front_len, gfp_mask, true); |
5185352c SW |
17 | if (!msg) { |
18 | dout("msgpool_alloc %s failed\n", pool->name); | |
19 | } else { | |
20 | dout("msgpool_alloc %s %p\n", pool->name, msg); | |
21 | msg->pool = pool; | |
22 | } | |
23 | return msg; | |
d52f847a | 24 | } |
8fc91fd8 | 25 | |
5185352c | 26 | static void msgpool_free(void *element, void *arg) |
8fc91fd8 | 27 | { |
5185352c SW |
28 | struct ceph_msgpool *pool = arg; |
29 | struct ceph_msg *msg = element; | |
30 | ||
31 | dout("msgpool_release %s %p\n", pool->name, msg); | |
32 | msg->pool = NULL; | |
33 | ceph_msg_put(msg); | |
8fc91fd8 SW |
34 | } |
35 | ||
d50b409f | 36 | int ceph_msgpool_init(struct ceph_msgpool *pool, int type, |
4f48280e | 37 | int front_len, int size, bool blocking, const char *name) |
8fc91fd8 | 38 | { |
5185352c | 39 | dout("msgpool %s init\n", name); |
d50b409f | 40 | pool->type = type; |
8fc91fd8 | 41 | pool->front_len = front_len; |
5185352c | 42 | pool->pool = mempool_create(size, msgpool_alloc, msgpool_free, pool); |
d52f847a SW |
43 | if (!pool->pool) |
44 | return -ENOMEM; | |
4f48280e | 45 | pool->name = name; |
d52f847a | 46 | return 0; |
8fc91fd8 SW |
47 | } |
48 | ||
49 | void ceph_msgpool_destroy(struct ceph_msgpool *pool) | |
50 | { | |
5185352c | 51 | dout("msgpool %s destroy\n", pool->name); |
d52f847a | 52 | mempool_destroy(pool->pool); |
8fc91fd8 SW |
53 | } |
54 | ||
d52f847a SW |
55 | struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, |
56 | int front_len) | |
8fc91fd8 | 57 | { |
5185352c SW |
58 | struct ceph_msg *msg; |
59 | ||
d52f847a | 60 | if (front_len > pool->front_len) { |
5185352c | 61 | dout("msgpool_get %s need front %d, pool size is %d\n", |
4f48280e | 62 | pool->name, front_len, pool->front_len); |
8f3bc053 SW |
63 | WARN_ON(1); |
64 | ||
65 | /* try to alloc a fresh message */ | |
d50b409f | 66 | return ceph_msg_new(pool->type, front_len, GFP_NOFS, false); |
8f3bc053 SW |
67 | } |
68 | ||
5185352c SW |
69 | msg = mempool_alloc(pool->pool, GFP_NOFS); |
70 | dout("msgpool_get %s %p\n", pool->name, msg); | |
71 | return msg; | |
8fc91fd8 SW |
72 | } |
73 | ||
74 | void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg) | |
75 | { | |
5185352c SW |
76 | dout("msgpool_put %s %p\n", pool->name, msg); |
77 | ||
d52f847a SW |
78 | /* reset msg front_len; user may have changed it */ |
79 | msg->front.iov_len = pool->front_len; | |
80 | msg->hdr.front_len = cpu_to_le32(pool->front_len); | |
3ca02ef9 | 81 | |
d52f847a | 82 | kref_init(&msg->kref); /* retake single ref */ |
5185352c | 83 | mempool_free(msg, pool->pool); |
8fc91fd8 | 84 | } |