1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/ceph/ceph_debug.h>
 3
 4#include <linux/err.h>
 5#include <linux/sched.h>
 6#include <linux/types.h>
 7#include <linux/vmalloc.h>
 8
 9#include <linux/ceph/messenger.h>
10#include <linux/ceph/msgpool.h>
11
12static void *msgpool_alloc(gfp_t gfp_mask, void *arg)
13{
14	struct ceph_msgpool *pool = arg;
15	struct ceph_msg *msg;
16
17	msg = ceph_msg_new2(pool->type, pool->front_len, pool->max_data_items,
18			    gfp_mask, true);
19	if (!msg) {
20		dout("msgpool_alloc %s failed\n", pool->name);
21	} else {
22		dout("msgpool_alloc %s %p\n", pool->name, msg);
23		msg->pool = pool;
24	}
25	return msg;
26}
27
28static void msgpool_free(void *element, void *arg)
29{
30	struct ceph_msgpool *pool = arg;
31	struct ceph_msg *msg = element;
32
33	dout("msgpool_release %s %p\n", pool->name, msg);
34	msg->pool = NULL;
35	ceph_msg_put(msg);
36}
37
38int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
39		      int front_len, int max_data_items, int size,
40		      const char *name)
41{
42	dout("msgpool %s init\n", name);
43	pool->type = type;
44	pool->front_len = front_len;
45	pool->max_data_items = max_data_items;
46	pool->pool = mempool_create(size, msgpool_alloc, msgpool_free, pool);
47	if (!pool->pool)
48		return -ENOMEM;
49	pool->name = name;
50	return 0;
51}
52
53void ceph_msgpool_destroy(struct ceph_msgpool *pool)
54{
55	dout("msgpool %s destroy\n", pool->name);
56	mempool_destroy(pool->pool);
57}
58
59struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, int front_len,
60				  int max_data_items)
61{
62	struct ceph_msg *msg;
63
64	if (front_len > pool->front_len ||
65	    max_data_items > pool->max_data_items) {
66		pr_warn_ratelimited("%s need %d/%d, pool %s has %d/%d\n",
67		    __func__, front_len, max_data_items, pool->name,
68		    pool->front_len, pool->max_data_items);
69		WARN_ON_ONCE(1);
70
71		/* try to alloc a fresh message */
72		return ceph_msg_new2(pool->type, front_len, max_data_items,
73				     GFP_NOFS, false);
74	}
75
76	msg = mempool_alloc(pool->pool, GFP_NOFS);
77	dout("msgpool_get %s %p\n", pool->name, msg);
78	return msg;
79}
80
81void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg)
82{
83	dout("msgpool_put %s %p\n", pool->name, msg);
84
85	/* reset msg front_len; user may have changed it */
86	msg->front.iov_len = pool->front_len;
87	msg->hdr.front_len = cpu_to_le32(pool->front_len);
88
89	msg->data_length = 0;
90	msg->num_data_items = 0;
91
92	kref_init(&msg->kref);  /* retake single ref */
93	mempool_free(msg, pool->pool);
94}

 
 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);
 
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);
 
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}