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/* SPDX-License-Identifier: GPL-2.0 */
#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)
{
if (b)
kref_put(&b->kref, ceph_buffer_release);
}
extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end);
#endif