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

 1#include <linux/ceph/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 <linux/ceph/msgpool.h>
 9
10static void *msgpool_alloc(gfp_t gfp_mask, void *arg)
11{
12	struct ceph_msgpool *pool = arg;
13	struct ceph_msg *msg;
14
15	msg = ceph_msg_new(0, pool->front_len, gfp_mask, true);
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;
23}
24
25static void msgpool_free(void *element, void *arg)
26{
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);
33}
34
35int ceph_msgpool_init(struct ceph_msgpool *pool,
36		      int front_len, int size, bool blocking, const char *name)
37{
38	dout("msgpool %s init\n", name);
 
39	pool->front_len = front_len;
40	pool->pool = mempool_create(size, msgpool_alloc, msgpool_free, pool);
41	if (!pool->pool)
42		return -ENOMEM;
43	pool->name = name;
44	return 0;
45}
46
47void ceph_msgpool_destroy(struct ceph_msgpool *pool)
48{
49	dout("msgpool %s destroy\n", pool->name);
50	mempool_destroy(pool->pool);
51}
52
53struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool,
54				  int front_len)
55{
56	struct ceph_msg *msg;
57
58	if (front_len > pool->front_len) {
59		dout("msgpool_get %s need front %d, pool size is %d\n",
60		       pool->name, front_len, pool->front_len);
61		WARN_ON(1);
62
63		/* try to alloc a fresh message */
64		return ceph_msg_new(0, front_len, GFP_NOFS, false);
65	}
66
67	msg = mempool_alloc(pool->pool, GFP_NOFS);
68	dout("msgpool_get %s %p\n", pool->name, msg);
69	return msg;
70}
71
72void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg)
73{
74	dout("msgpool_put %s %p\n", pool->name, msg);
75
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);
79
80	kref_init(&msg->kref);  /* retake single ref */
81	mempool_free(msg, pool->pool);
82}