1 #include "ceph_debug.h"
4 #include <linux/sched.h>
5 #include <linux/types.h>
6 #include <linux/vmalloc.h>
10 static void *alloc_fn(gfp_t gfp_mask, void *arg)
12 struct ceph_msgpool *pool = arg;
15 m = ceph_msg_new(0, pool->front_len, 0, 0, NULL);
21 static void free_fn(void *element, void *arg)
23 ceph_msg_put(element);
26 int ceph_msgpool_init(struct ceph_msgpool *pool,
27 int front_len, int size, bool blocking)
29 pool->front_len = front_len;
30 pool->pool = mempool_create(size, alloc_fn, free_fn, pool);
36 void ceph_msgpool_destroy(struct ceph_msgpool *pool)
38 mempool_destroy(pool->pool);
41 struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool,
44 if (front_len > pool->front_len) {
47 pr_err("msgpool_get pool %p need front %d, pool size is %d\n",
48 pool, front_len, pool->front_len);
51 /* try to alloc a fresh message */
52 msg = ceph_msg_new(0, front_len, 0, 0, NULL);
58 return mempool_alloc(pool->pool, GFP_NOFS);
61 void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg)
63 /* reset msg front_len; user may have changed it */
64 msg->front.iov_len = pool->front_len;
65 msg->hdr.front_len = cpu_to_le32(pool->front_len);
67 kref_init(&msg->kref); /* retake single ref */