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/fs/befs/befs.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C Header | 156 lines | 106 code | 32 blank | 18 comment | 2 complexity | 39222d3726122a79d2d86a92f4dfd69a MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  1/*
  2 * befs.h
  3 *
  4 * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>
  5 * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)
  6 */
  7
  8#ifndef _LINUX_BEFS_H
  9#define _LINUX_BEFS_H
 10
 11#include "befs_fs_types.h"
 12
 13/* used in debug.c */
 14#define BEFS_VERSION "0.9.3"
 15
 16
 17typedef u64 befs_blocknr_t;
 18/*
 19 * BeFS in memory structures
 20 */
 21
 22typedef struct befs_mount_options {
 23	gid_t gid;
 24	uid_t uid;
 25	int use_gid;
 26	int use_uid;
 27	int debug;
 28	char *iocharset;
 29} befs_mount_options;
 30
 31typedef struct befs_sb_info {
 32	u32 magic1;
 33	u32 block_size;
 34	u32 block_shift;
 35	int byte_order;
 36	befs_off_t num_blocks;
 37	befs_off_t used_blocks;
 38	u32 inode_size;
 39	u32 magic2;
 40
 41	/* Allocation group information */
 42	u32 blocks_per_ag;
 43	u32 ag_shift;
 44	u32 num_ags;
 45
 46	/* jornal log entry */
 47	befs_block_run log_blocks;
 48	befs_off_t log_start;
 49	befs_off_t log_end;
 50
 51	befs_inode_addr root_dir;
 52	befs_inode_addr indices;
 53	u32 magic3;
 54
 55	befs_mount_options mount_opts;
 56	struct nls_table *nls;
 57
 58} befs_sb_info;
 59
 60typedef struct befs_inode_info {
 61	u32 i_flags;
 62	u32 i_type;
 63
 64	befs_inode_addr i_inode_num;
 65	befs_inode_addr i_parent;
 66	befs_inode_addr i_attribute;
 67
 68	union {
 69		befs_data_stream ds;
 70		char symlink[BEFS_SYMLINK_LEN];
 71	} i_data;
 72
 73	struct inode vfs_inode;
 74
 75} befs_inode_info;
 76
 77enum befs_err {
 78	BEFS_OK,
 79	BEFS_ERR,
 80	BEFS_BAD_INODE,
 81	BEFS_BT_END,
 82	BEFS_BT_EMPTY,
 83	BEFS_BT_MATCH,
 84	BEFS_BT_PARMATCH,
 85	BEFS_BT_NOT_FOUND
 86};
 87
 88
 89/****************************/
 90/* debug.c */
 91void befs_error(const struct super_block *sb, const char *fmt, ...);
 92void befs_warning(const struct super_block *sb, const char *fmt, ...);
 93void befs_debug(const struct super_block *sb, const char *fmt, ...);
 94
 95void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
 96void befs_dump_inode(const struct super_block *sb, befs_inode *);
 97void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
 98void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);
 99/****************************/
100
101
102/* Gets a pointer to the private portion of the super_block
103 * structure from the public part
104 */
105static inline befs_sb_info *
106BEFS_SB(const struct super_block *super)
107{
108	return (befs_sb_info *) super->s_fs_info;
109}
110
111static inline befs_inode_info *
112BEFS_I(const struct inode *inode)
113{
114	return list_entry(inode, struct befs_inode_info, vfs_inode);
115}
116
117static inline befs_blocknr_t
118iaddr2blockno(struct super_block *sb, befs_inode_addr * iaddr)
119{
120	return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +
121		iaddr->start);
122}
123
124static inline befs_inode_addr
125blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
126{
127	befs_inode_addr iaddr;
128	iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
129	iaddr.start =
130	    blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
131	iaddr.len = 1;
132
133	return iaddr;
134}
135
136static inline unsigned int
137befs_iaddrs_per_block(struct super_block *sb)
138{
139	return BEFS_SB(sb)->block_size / sizeof (befs_disk_inode_addr);
140}
141
142static inline int
143befs_iaddr_is_empty(befs_inode_addr * iaddr)
144{
145	return (!iaddr->allocation_group) && (!iaddr->start) && (!iaddr->len);
146}
147
148static inline size_t
149befs_brun_size(struct super_block *sb, befs_block_run run)
150{
151	return BEFS_SB(sb)->block_size * run.len;
152}
153
154#include "endian.h"
155
156#endif				/* _LINUX_BEFS_H */