[GitHub/mt8127/android_kernel_alcatel_ttab.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 small sizes (<= one page), vmalloc for larger
 * sizes.
 */
struct ceph_buffer {
	struct kref kref;
	struct kvec vec;
	size_t alloc_len;
	bool is_vmalloc;
};

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	*
	13	* use kmalloc for small sizes (<= one page), vmalloc for larger
	14	* sizes.
	15	*/
	16	struct ceph_buffer {
dd26d857	17	struct kref kref;
c30dbb9c SW	18	struct kvec vec;
	19	size_t alloc_len;
	20	bool is_vmalloc;
	21	};
	22
b6c1d5b8 SW	23	extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp);
b6c1d5b8 SW	24	extern void ceph_buffer_release(struct kref *kref);
c30dbb9c SW	25
	26	static inline struct ceph_buffer ceph_buffer_get(struct ceph_buffer b)
	27	{
dd26d857	28	kref_get(&b->kref);
c30dbb9c SW	29	return b;
	30	}
	31
	32	static inline void ceph_buffer_put(struct ceph_buffer *b)
	33	{
b6c1d5b8	34	kref_put(&b->kref, ceph_buffer_release);
c30dbb9c SW	35	}
c30dbb9c SW	36
c7e337d6 SW	37	extern int ceph_decode_buffer(struct ceph_buffer b, void p, void *end);
c7e337d6 SW	38
c30dbb9c	39	#endif