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