ext3のディレクトリエントリ

ext3のディレクトリエントリ – WhiteAnthrax
* ext3のディレクトリエントリの構造
* fs/ext3/ext3.h
/*
* Structure of a directory entry
*/
#define EXT3_NAME_LEN 255

struct ext3_dir_entry {
__le32 inode; /* Inode number */
__le16 rec_len; /* Directory entry length */
__le16 name_len; /* Name length */
char name[EXT3_NAME_LEN]; /* File name */
};

/*
* The new version of the directory entry. Since EXT3 structures are
* stored in intel byte order, and the name_len field could never be
* bigger than 255 chars, it's safe to reclaim the extra byte for the
* file_type field.
*/
struct ext3_dir_entry_2 {
__le32 inode; /* Inode number */
__le16 rec_len; /* Directory entry length */
__u8 name_len; /* Name length */
__u8 file_type;
char name[EXT3_NAME_LEN]; /* File name */
};

/*
* Ext3 directory file types. Only the low 3 bits are used. The
* other bits are reserved for now.
*/
#define EXT3_FT_UNKNOWN 0
#define EXT3_FT_REG_FILE 1
#define EXT3_FT_DIR 2
#define EXT3_FT_CHRDEV 3
#define EXT3_FT_BLKDEV 4
#define EXT3_FT_FIFO 5
#define EXT3_FT_SOCK 6
#define EXT3_FT_SYMLINK 7

#define EXT3_FT_MAX 8

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