6 /* in whice sector the tfs stored in the boot image */
7 #define TFS_FS_SECTOR (832)
8 #define TFS_SB_SECTOR (TFS_FS_SECTOR + 1)
10 #define TFS_ROOT_INODE 1
15 /* just support I_FILE and I_DIR only currently */
16 enum tfs_inode_mode
{ I_FILE
, I_DIR
, I_UNKNOWN
};
18 static inline int get_mode(int mode
)
22 else if (mode
& TFS_DIR
)
28 /* It's really enought for a test file system */
29 #define TFS_N_BLOCKS 8
32 uint16_t i_mode
; /* File mode */
33 uint16_t i_uid
; /* Owner UID */
34 uint32_t i_size
; /* File size */
35 uint32_t i_atime
; /* Access time */
36 uint32_t i_ctime
; /* Create time */
37 uint32_t i_mtime
; /* modify time */
38 uint32_t i_dtime
; /* delete time */
39 uint32_t i_block
[TFS_N_BLOCKS
]; /* block address of file's count */
40 uint32_t i_flags
; /* flags */
41 uint32_t i_reserved
[1];
44 /* The max lenght of each file name */
45 #define TFS_NAME_LEN 28
46 struct tfs_dir_entry
{
47 uint32_t d_inode
; /* inode number */
48 char d_name
[TFS_NAME_LEN
]; /* entry name */
51 #define TFS_MAGIC 0x4c534654 /* TFSL */
54 struct tfs_super_block
{
55 uint32_t s_inodes_count
; /* Max file count */
56 uint32_t s_blocks_count
;
57 uint32_t s_free_blocks_count
;
58 uint32_t s_free_inodes_count
;
59 uint32_t s_magic
; /* TFS's magic signature */
60 uint32_t s_block_shift
; /* Block size */
62 uint32_t s_inode_bitmap
;
63 uint32_t s_block_bitmap
;
64 uint32_t s_inode_table
;
65 uint32_t s_data_area
; /* where the data starts */
68 uint32_t s_offset
; /* In which sector the fs stored */
69 uint32_t s_reserved
[117];
72 /* TFS super block info */
74 uint32_t s_inodes_count
; /* Max file count */
75 uint32_t s_blocks_count
;
76 uint32_t s_free_blocks_count
;
77 uint32_t s_free_inodes_count
;
78 uint32_t s_block_shift
; /* Block size in bits */
79 uint32_t s_block_size
; /* Block size in bytes */
81 uint32_t s_inode_bitmap
;
82 uint32_t s_inode_bitmap_count
;
83 uint32_t s_block_bitmap
;
84 uint32_t s_block_bitmap_count
;
85 uint32_t s_inode_table
;
86 uint32_t s_inode_table_count
;
87 uint32_t s_data_area
; /* where the data starts */
90 uint32_t s_offset
; /* In which sector the fs stored */
92 int s_inodes_per_block
;
95 extern struct tfs_sb_info
*tfs_sbi
;
98 #define TFS_INODES_PER_BLOCK(sbi) (sbi->s_inodes_per_block)
100 #define TFS_DEBUG //printk
102 #define roundup(x, y) ((x) / (y) + (((x) % (y)) ? 1 : 0))
106 static inline struct tfs_sb_info
* TFS_SBI(struct fs
*fs
)
112 extern int tfs_bread(struct tfs_sb_info
*, uint32_t , void *);
113 extern int tfs_bwrite(struct tfs_sb_info
*, uint32_t, void *);
116 int tfs_get_blk_shift(void *sb
);
117 void * tfs_mount(void);
120 int tfs_free_inode(struct tfs_sb_info
*, int);
121 int tfs_alloc_inode(struct tfs_sb_info
*, int);
124 int tfs_alloc_block(struct tfs_sb_info
*, uint32_t);
125 int tfs_free_block(struct tfs_sb_info
*, uint32_t);
129 struct cache_struct
*tfs_find_entry(struct inode
*, const char *, struct tfs_dir_entry
**);
130 int tfs_add_entry(struct inode
*, const char *, int , int *);
131 int tfs_mkdir(struct inode
*, const char *);
132 int tfs_rmdir(struct inode
*, const char *);
133 int tfs_unlink(struct inode
*, const char *);
136 struct inode
* tfs_new_inode(struct inode
*, int, int);
137 int tfs_release_inode(struct tfs_sb_info
*, struct inode
*);
138 struct inode
*tfs_root_init(struct tfs_sb_info
*);
139 struct inode
*tfs_iget_root(struct fs
*);
140 struct inode
*tfs_iget_by_inr(struct fs
*, int);
141 struct inode
*tfs_iget(const char *, struct inode
*);
142 uint32_t tfs_bmap(struct inode
*, int);
143 int tfs_iwrite(struct inode
*);
144 struct inode
*tfs_mknod(struct inode
*, const char *, int);
147 extern struct inode_operations tfs_inode_ops
;
148 extern struct file_operations tfs_file_ops
;