Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
[zen-stable.git] / net / ceph / msgpool.c
blob11d5f4196a73cfeef3492389c76f9f285c50188d
1 #include <linux/ceph/ceph_debug.h>
3 #include <linux/err.h>
4 #include <linux/sched.h>
5 #include <linux/types.h>
6 #include <linux/vmalloc.h>
8 #include <linux/ceph/msgpool.h>
10 static void *msgpool_alloc(gfp_t gfp_mask, void *arg)
12 struct ceph_msgpool *pool = arg;
13 struct ceph_msg *msg;
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;
22 return msg;
25 static void msgpool_free(void *element, void *arg)
27 struct ceph_msgpool *pool = arg;
28 struct ceph_msg *msg = element;
30 dout("msgpool_release %s %p\n", pool->name, msg);
31 msg->pool = NULL;
32 ceph_msg_put(msg);
35 int ceph_msgpool_init(struct ceph_msgpool *pool,
36 int front_len, int size, bool blocking, const char *name)
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;
47 void ceph_msgpool_destroy(struct ceph_msgpool *pool)
49 dout("msgpool %s destroy\n", pool->name);
50 mempool_destroy(pool->pool);
53 struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool,
54 int front_len)
56 struct ceph_msg *msg;
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);
63 /* try to alloc a fresh message */
64 return ceph_msg_new(0, front_len, GFP_NOFS, false);
67 msg = mempool_alloc(pool->pool, GFP_NOFS);
68 dout("msgpool_get %s %p\n", pool->name, msg);
69 return msg;
72 void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg)
74 dout("msgpool_put %s %p\n", pool->name, msg);
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);
80 kref_init(&msg->kref); /* retake single ref */
81 mempool_free(msg, pool->pool);