include/uapi/linux/bfs_fs.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/bfs_fs.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/bfs_fs.h
Extension
.h
Size
1905 bytes
Lines
83
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct bfs_inode {
	__le16 i_ino;
	__u16 i_unused;
	__le32 i_sblock;
	__le32 i_eblock;
	__le32 i_eoffset;
	__le32 i_vtype;
	__le32 i_mode;
	__le32 i_uid;
	__le32 i_gid;
	__le32 i_nlink;
	__le32 i_atime;
	__le32 i_mtime;
	__le32 i_ctime;
	__u32 i_padding[4];
};

#define BFS_NAMELEN		14	
#define BFS_DIRENT_SIZE		16
#define BFS_DIRS_PER_BLOCK	32

struct bfs_dirent {
	__le16 ino;
	char name[BFS_NAMELEN];
};

/* BFS superblock layout on disk */
struct bfs_super_block {
	__le32 s_magic;
	__le32 s_start;
	__le32 s_end;
	__le32 s_from;
	__le32 s_to;
	__s32 s_bfrom;
	__s32 s_bto;
	char  s_fsname[6];
	char  s_volume[6];
	__u32 s_padding[118];
};


#define BFS_OFF2INO(offset) \
        ((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO)

#define BFS_INO2OFF(ino) \
	((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE)
#define BFS_NZFILESIZE(ip) \
        ((le32_to_cpu((ip)->i_eoffset) + 1) -  le32_to_cpu((ip)->i_sblock) * BFS_BSIZE)

#define BFS_FILESIZE(ip) \
        ((ip)->i_sblock == 0 ? 0 : BFS_NZFILESIZE(ip))

#define BFS_FILEBLOCKS(ip) \
        ((ip)->i_sblock == 0 ? 0 : (le32_to_cpu((ip)->i_eblock) + 1) -  le32_to_cpu((ip)->i_sblock))
#define BFS_UNCLEAN(bfs_sb, sb)	\
	((le32_to_cpu(bfs_sb->s_from) != -1) && (le32_to_cpu(bfs_sb->s_to) != -1) && !(sb->s_flags & SB_RDONLY))


#endif	/* _LINUX_BFS_FS_H */

Annotation

Implementation Notes