[deliverable/linux.git] / net / ceph / msgpool.c

#include <linux/ceph/ceph_debug.h>

#include <linux/err.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/vmalloc.h>

#include <linux/ceph/messenger.h>
#include <linux/ceph/msgpool.h>

static void *msgpool_alloc(gfp_t gfp_mask, void *arg)
{
	struct ceph_msgpool *pool = arg;
	struct ceph_msg *msg;

	msg = ceph_msg_new(pool->type, pool->front_len, gfp_mask, true);
	if (!msg) {
		dout("msgpool_alloc %s failed\n", pool->name);
	} else {
		dout("msgpool_alloc %s %p\n", pool->name, msg);
		msg->pool = pool;
	}
	return msg;
}

static void msgpool_free(void *element, void *arg)
{
	struct ceph_msgpool *pool = arg;
	struct ceph_msg *msg = element;

	dout("msgpool_release %s %p\n", pool->name, msg);
	msg->pool = NULL;
	ceph_msg_put(msg);
}

int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
		      int front_len, int size, bool blocking, const char *name)
{
	dout("msgpool %s init\n", name);
	pool->type = type;
	pool->front_len = front_len;
	pool->pool = mempool_create(size, msgpool_alloc, msgpool_free, pool);
	if (!pool->pool)
		return -ENOMEM;
	pool->name = name;
	return 0;
}

void ceph_msgpool_destroy(struct ceph_msgpool *pool)
{
	dout("msgpool %s destroy\n", pool->name);
	mempool_destroy(pool->pool);
}

struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool,
				  int front_len)
{
	struct ceph_msg *msg;

	if (front_len > pool->front_len) {
		dout("msgpool_get %s need front %d, pool size is %d\n",
		       pool->name, front_len, pool->front_len);
		WARN_ON(1);

		/* try to alloc a fresh message */
		return ceph_msg_new(pool->type, front_len, GFP_NOFS, false);
	}

	msg = mempool_alloc(pool->pool, GFP_NOFS);
	dout("msgpool_get %s %p\n", pool->name, msg);
	return msg;
}

void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg)
{
	dout("msgpool_put %s %p\n", pool->name, 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 */
	mempool_free(msg, pool->pool);
}
Commit	Line	Data
	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/messenger.h>
	9	#include <linux/ceph/msgpool.h>
	10
	11	static void msgpool_alloc(gfp_t gfp_mask, void arg)
	12	{
	13	struct ceph_msgpool *pool = arg;
	14	struct ceph_msg *msg;
	15
	16	msg = ceph_msg_new(pool->type, pool->front_len, gfp_mask, true);
	17	if (!msg) {
	18	dout("msgpool_alloc %s failed\n", pool->name);
	19	} else {
	20	dout("msgpool_alloc %s %p\n", pool->name, msg);
	21	msg->pool = pool;
	22	}
	23	return msg;
	24	}
	25
	26	static void msgpool_free(void element, void arg)
	27	{
	28	struct ceph_msgpool *pool = arg;
	29	struct ceph_msg *msg = element;
	30
	31	dout("msgpool_release %s %p\n", pool->name, msg);
	32	msg->pool = NULL;
	33	ceph_msg_put(msg);
	34	}
	35
	36	int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
	37	int front_len, int size, bool blocking, const char *name)
	38	{
	39	dout("msgpool %s init\n", name);
	40	pool->type = type;
	41	pool->front_len = front_len;
	42	pool->pool = mempool_create(size, msgpool_alloc, msgpool_free, pool);
	43	if (!pool->pool)
	44	return -ENOMEM;
	45	pool->name = name;
	46	return 0;
	47	}
	48
	49	void ceph_msgpool_destroy(struct ceph_msgpool *pool)
	50	{
	51	dout("msgpool %s destroy\n", pool->name);
	52	mempool_destroy(pool->pool);
	53	}
	54
	55	struct ceph_msg ceph_msgpool_get(struct ceph_msgpool pool,
	56	int front_len)
	57	{
	58	struct ceph_msg *msg;
	59
	60	if (front_len > pool->front_len) {
	61	dout("msgpool_get %s need front %d, pool size is %d\n",
	62	pool->name, front_len, pool->front_len);
	63	WARN_ON(1);
	64
	65	/* try to alloc a fresh message */
	66	return ceph_msg_new(pool->type, front_len, GFP_NOFS, false);
	67	}
	68
	69	msg = mempool_alloc(pool->pool, GFP_NOFS);
	70	dout("msgpool_get %s %p\n", pool->name, msg);
	71	return msg;
	72	}
	73
	74	void ceph_msgpool_put(struct ceph_msgpool pool, struct ceph_msg msg)
	75	{
	76	dout("msgpool_put %s %p\n", pool->name, msg);
	77
	78	/* reset msg front_len; user may have changed it */
	79	msg->front.iov_len = pool->front_len;
	80	msg->hdr.front_len = cpu_to_le32(pool->front_len);
	81
	82	kref_init(&msg->kref); /* retake single ref */
	83	mempool_free(msg, pool->pool);
	84	}