LXR linux/include/linux/ceph/buffer.h

   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