forked from luck/tmp_suning_uos_patched
a79832f26b
Returning ERR_PTR(-ENOMEM) is useless extra work. Return NULL on failure instead, and fix up the callers (about half of which were wrong anyway). Signed-off-by: Sage Weil <sage@newdream.net>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
#include "ceph_debug.h"
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/types.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
#include "msgpool.h"
|
|
|
|
static void *alloc_fn(gfp_t gfp_mask, void *arg)
|
|
{
|
|
struct ceph_msgpool *pool = arg;
|
|
|
|
return ceph_msg_new(0, pool->front_len, 0, 0, NULL);
|
|
}
|
|
|
|
static void free_fn(void *element, void *arg)
|
|
{
|
|
ceph_msg_put(element);
|
|
}
|
|
|
|
int ceph_msgpool_init(struct ceph_msgpool *pool,
|
|
int front_len, int size, bool blocking)
|
|
{
|
|
pool->front_len = front_len;
|
|
pool->pool = mempool_create(size, alloc_fn, free_fn, pool);
|
|
if (!pool->pool)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void ceph_msgpool_destroy(struct ceph_msgpool *pool)
|
|
{
|
|
mempool_destroy(pool->pool);
|
|
}
|
|
|
|
struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool,
|
|
int front_len)
|
|
{
|
|
if (front_len > pool->front_len) {
|
|
pr_err("msgpool_get pool %p need front %d, pool size is %d\n",
|
|
pool, front_len, pool->front_len);
|
|
WARN_ON(1);
|
|
|
|
/* try to alloc a fresh message */
|
|
return ceph_msg_new(0, front_len, 0, 0, NULL);
|
|
}
|
|
|
|
return mempool_alloc(pool->pool, GFP_NOFS);
|
|
}
|
|
|
|
void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *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 */
|
|
}
|