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 small sizes (<= one page), vmalloc for larger 14 * sizes. 15 */ 16struct ceph_buffer { 17 struct kref kref; 18 struct kvec vec; 19 size_t alloc_len; 20 bool is_vmalloc; 21}; 22 23extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp); 24extern void ceph_buffer_release(struct kref *kref); 25 26static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b) 27{ 28 kref_get(&b->kref); 29 return b; 30} 31 32static inline void ceph_buffer_put(struct ceph_buffer *b) 33{ 34 kref_put(&b->kref, ceph_buffer_release); 35} 36 37extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end); 38 39#endif 40