[deliverable/linux.git] / include / linux / ceph / buffer.h

#ifndef __FS_CEPH_BUFFER_H
#define __FS_CEPH_BUFFER_H

#include <linux/kref.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/types.h>
#include <linux/uio.h>

/*
 * a simple reference counted buffer.
 *
 * use kmalloc for smaller sizes, vmalloc for larger sizes.
 */
struct ceph_buffer {
	struct kref kref;
	struct kvec vec;
	size_t alloc_len;
};

extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp);
extern void ceph_buffer_release(struct kref *kref);

static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b)
{
	kref_get(&b->kref);
	return b;
}

static inline void ceph_buffer_put(struct ceph_buffer *b)
{
	kref_put(&b->kref, ceph_buffer_release);
}

extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end);

#endif
Commit	Line	Data
c30dbb9c SW	1	#ifndef __FS_CEPH_BUFFER_H
	2	#define __FS_CEPH_BUFFER_H
	3
dd26d857	4	#include <linux/kref.h>
c30dbb9c SW	5	#include <linux/mm.h>
	6	#include <linux/vmalloc.h>
	7	#include <linux/types.h>
	8	#include <linux/uio.h>
	9
	10	/*
	11	* a simple reference counted buffer.
	12	*
4965fc38	13	* use kmalloc for smaller sizes, vmalloc for larger sizes.
c30dbb9c SW	14	*/
c30dbb9c SW	15	struct ceph_buffer {
dd26d857	16	struct kref kref;
c30dbb9c SW	17	struct kvec vec;
c30dbb9c SW	18	size_t alloc_len;
c30dbb9c SW	19	};
c30dbb9c SW	20
b6c1d5b8 SW	21	extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp);
b6c1d5b8 SW	22	extern void ceph_buffer_release(struct kref *kref);
c30dbb9c SW	23
	24	static inline struct ceph_buffer ceph_buffer_get(struct ceph_buffer b)
	25	{
dd26d857	26	kref_get(&b->kref);
c30dbb9c SW	27	return b;
	28	}
	29
	30	static inline void ceph_buffer_put(struct ceph_buffer *b)
	31	{
b6c1d5b8	32	kref_put(&b->kref, ceph_buffer_release);
c30dbb9c SW	33	}
c30dbb9c SW	34
c7e337d6 SW	35	extern int ceph_decode_buffer(struct ceph_buffer b, void p, void *end);
c7e337d6 SW	36
c30dbb9c	37	#endif