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