1#ifndef __FS_CEPH_BUFFER_H
2#define __FS_CEPH_BUFFER_H
3
4#include <linux/kref.h>
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 smaller sizes, vmalloc for larger sizes.
14 */
15struct ceph_buffer {
16	struct kref kref;
17	struct kvec vec;
18	size_t alloc_len;
19};
20
21extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp);
22extern void ceph_buffer_release(struct kref *kref);
23
24static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b)
25{
26	kref_get(&b->kref);
27	return b;
28}
29
30static inline void ceph_buffer_put(struct ceph_buffer *b)
31{
32	kref_put(&b->kref, ceph_buffer_release);
33}
34
35extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end);
36
37#endif
38