#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