projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 58bb3b37 SW |
1 | #ifndef __FS_CEPH_PAGELIST_H |
| 2 | #define __FS_CEPH_PAGELIST_H | |
| 3 | ||
| 4 | #include <linux/list.h> | |
| 5 | ||
| 6 | struct ceph_pagelist { | |
| 7 | struct list_head head; | |
| 8 | void *mapped_tail; | |
| 9 | size_t length; | |
| 10 | size_t room; | |
| 11 | }; | |
| 12 | ||
| 13 | static 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 | } | |
| 20 | extern int ceph_pagelist_release(struct ceph_pagelist *pl); | |
| 21 | ||
| 22 | extern int ceph_pagelist_append(struct ceph_pagelist *pl, void *d, size_t l); | |
| 23 | ||
| 24 | static 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 | } | |
| 29 | static 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 | } | |
| 34 | static 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 | } | |
| 39 | static inline int ceph_pagelist_encode_8(struct ceph_pagelist *pl, u8 v) | |
| 40 | { | |
| 41 | return ceph_pagelist_append(pl, &v, 1); | |
| 42 | } | |
| 43 | static 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 |