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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __FS_CEPH_BUFFER_H3#define __FS_CEPH_BUFFER_H4 5#include <linux/kref.h>6#include <linux/mm.h>7#include <linux/vmalloc.h>8#include <linux/types.h>9#include <linux/uio.h>10 11/*12 * a simple reference counted buffer.13 *14 * use kmalloc for smaller sizes, vmalloc for larger sizes.15 */16struct ceph_buffer {17 struct kref kref;18 struct kvec vec;19 size_t alloc_len;20};21 22extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp);23extern void ceph_buffer_release(struct kref *kref);24 25static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b)26{27 kref_get(&b->kref);28 return b;29}30 31static inline void ceph_buffer_put(struct ceph_buffer *b)32{33 if (b)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#endif40