1#ifndef __FS_CEPH_PAGELIST_H
2#define __FS_CEPH_PAGELIST_H
3
4#include <linux/list.h>
5
6struct ceph_pagelist {
7	struct list_head head;
8	void *mapped_tail;
9	size_t length;
10	size_t room;
11};
12
13static inline void ceph_pagelist_init(struct ceph_pagelist *pl)
14{
15	INIT_LIST_HEAD(&pl->head);
16	pl->mapped_tail = NULL;
17	pl->length = 0;
18	pl->room = 0;
19}
20extern int ceph_pagelist_release(struct ceph_pagelist *pl);
21
22extern int ceph_pagelist_append(struct ceph_pagelist *pl, void *d, size_t l);
23
24static inline int ceph_pagelist_encode_64(struct ceph_pagelist *pl, u64 v)
25{
26	__le64 ev = cpu_to_le64(v);
27	return ceph_pagelist_append(pl, &ev, sizeof(ev));
28}
29static inline int ceph_pagelist_encode_32(struct ceph_pagelist *pl, u32 v)
30{
31	__le32 ev = cpu_to_le32(v);
32	return ceph_pagelist_append(pl, &ev, sizeof(ev));
33}
34static inline int ceph_pagelist_encode_16(struct ceph_pagelist *pl, u16 v)
35{
36	__le16 ev = cpu_to_le16(v);
37	return ceph_pagelist_append(pl, &ev, sizeof(ev));
38}
39static inline int ceph_pagelist_encode_8(struct ceph_pagelist *pl, u8 v)
40{
41	return ceph_pagelist_append(pl, &v, 1);
42}
43static inline int ceph_pagelist_encode_string(struct ceph_pagelist *pl,
44					      char *s, size_t len)
45{
46	int ret = ceph_pagelist_encode_32(pl, len);
47	if (ret)
48		return ret;
49	if (len)
50		return ceph_pagelist_append(pl, s, len);
51	return 0;
52}
53
54#endif
55