/* Including <linux/fs.h> became more and more painful.
Below a very abbreviated version of some declarations,
only designed to be able to check a magic number
in case no filesystem type was given. */
#ifndef BLKGETSIZE
#ifndef _IO
/* pre-1.3.45 */
#define BLKGETSIZE 0x1260 /* return device size */
#else
/* same on i386, m68k, arm; different on alpha, mips, sparc, ppc */
#define BLKGETSIZE _IO(0x12,96)
#endif
#endif
#define MINIX_SUPER_MAGIC 0x137F /* minix v1, 14 char names */
#define MINIX_SUPER_MAGIC2 0x138F /* minix v1, 30 char names */
#define MINIX2_SUPER_MAGIC 0x2468 /* minix v2, 14 char names */
#define MINIX2_SUPER_MAGIC2 0x2478 /* minix v2, 30 char names */
struct minix_super_block {
u_char s_dummy[16];
u_char s_magic[2];
};
#define minixmagic(s) assemble2le(s.s_magic)
#define ISODCL(from, to) (to - from + 1)
#define ISO_STANDARD_ID "CD001"
struct iso_volume_descriptor {
char type[ISODCL(1,1)]; /* 711 */
char id[ISODCL(2,6)];
char version[ISODCL(7,7)];
char data[ISODCL(8,2048)];
};
#define HS_STANDARD_ID "CDROM"
struct hs_volume_descriptor {
char foo[ISODCL ( 1, 8)]; /* 733 */
char type[ISODCL ( 9, 9)]; /* 711 */
char id[ISODCL ( 10, 14)];
char version[ISODCL ( 15, 15)]; /* 711 */
char data[ISODCL(16,2048)];
};
#define EXT_SUPER_MAGIC 0x137D
struct ext_super_block {
u_char s_dummy[56];
u_char s_magic[2];
};
#define extmagic(s) assemble2le(s.s_magic)
#define EXT2_PRE_02B_MAGIC 0xEF51
#define EXT2_SUPER_MAGIC 0xEF53
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
struct ext2_super_block {
u_char s_dummy1[56];
u_char s_magic[2];
u_char s_dummy2[34];
u_char s_feature_compat[4];
u_char s_feature_incompat[4];
u_char s_feature_ro_compat[4];
u_char s_uuid[16];
u_char s_volume_name[16];
u_char s_dummy3[88];
u_char s_journal_inum[4]; /* ext3 only */
};
#define ext2magic(s) assemble2le(s.s_magic)
struct reiserfs_super_block
{
u_char s_block_count[4];
u_char s_free_blocks[4];
u_char s_root_block[4];
u_char s_journal_block[4];
u_char s_journal_dev[4];
u_char s_orig_journal_size[4];
u_char s_journal_trans_max[4];
u_char s_journal_block_count[4];
u_char s_journal_max_batch[4];
u_char s_journal_max_commit_age[4];
u_char s_journal_max_trans_age[4];
u_char s_blocksize[2];
u_char s_oid_maxsize[2];
u_char s_oid_cursize[2];
u_char s_state[2];
u_char s_magic[12];
};
#define REISERFS_SUPER_MAGIC_STRING "ReIsErFs"
#define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs"
#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
/* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */
#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024)
#define _XIAFS_SUPER_MAGIC 0x012FD16D
struct xiafs_super_block {
u_char s_boot_segment[512]; /* 1st sector reserved for boot */
u_char s_dummy[60];
u_char s_magic[4];
};
#define xiafsmagic(s) assemble4le(s.s_magic)
/* From jj@sunsite.ms.mff.cuni.cz Mon Mar 23 15:19:05 1998 */
#define UFS_SUPER_MAGIC_LE 0x00011954
#define UFS_SUPER_MAGIC_BE 0x54190100
struct ufs_super_block {
u_char s_dummy[0x55c];
u_char s_magic[4];
};
#define ufsmagic(s) assemble4le(s.s_magic)
/* From Richard.Russon@ait.co.uk Wed Feb 24 08:05:27 1999 */
#define NTFS_SUPER_MAGIC "NTFS"
struct ntfs_super_block {
u_char s_dummy[3];
u_char s_magic[4];
};
/* From inspection of a few FAT filesystems - aeb */
/* Unfortunately I find almost the same thing on an extended partition;
it looks like a primary has some directory entries where the extended
has a partition table: IO.SYS, MSDOS.SYS, WINBOOT.SYS */
struct fat_super_block {
u_char s_dummy[3];
u_char s_os[8]; /* "MSDOS5.0" or "MSWIN4.0" or "MSWIN4.1" */
/* mtools-3.9.4 writes "MTOOL394" */
u_char s_dummy2[32];
u_char s_label[11]; /* for DOS? */
u_char s_fs[8]; /* "FAT12 " or "FAT16 " or all zero */
/* OS/2 BM has "FAT " here. */
u_char s_dummy3[9];
u_char s_label2[11]; /* for Windows? */
u_char s_fs2[8]; /* garbage or "FAT32 " */
};
#define XFS_SUPER_MAGIC "XFSB"
struct xfs_super_block {
u_char s_magic[4];
u_char s_dummy[28];
u_char s_uuid[16];
u_char s_dummy2[60];
u_char s_fname[12];
};
#define CRAMFS_SUPER_MAGIC 0x28cd3d45
#define CRAMFS_SUPER_MAGIC_BE 0x453dcd28
struct cramfs_super_block {
u_char s_magic[4];
u_char s_dummy[12];
u_char s_id[16];
};
#define cramfsmagic(s) assemble4le(s.s_magic)
#define HFS_SUPER_MAGIC 0x4244
struct hfs_super_block {
u_char s_magic[2];
u_char s_dummy[18];
u_char s_blksize[4];
};
#define hfsmagic(s) assemble2le(s.s_magic)
#define hfsblksize(s) assemble4le(s.s_blksize)
#define HPFS_SUPER_MAGIC 0xf995e849
struct hpfs_super_block {
u_char s_magic[4];
u_char s_magic2[4];
};
#define hpfsmagic(s) assemble4le(s.s_magic)
struct adfs_super_block {
u_char s_dummy[448];
u_char s_blksize[1];
u_char s_dummy2[62];
u_char s_checksum[1];
};
#define adfsblksize(s) ((uint) s.s_blksize[0])
/* found in first 4 bytes of block 1 */
struct vxfs_super_block {
u_char s_magic[4];
};
#define vxfsmagic(s) assemble4le(s.s_magic)
#define VXFS_SUPER_MAGIC 0xa501FCF5
struct jfs_super_block {
char s_magic[4];
u_char s_version[4];
u_char s_dummy1[93];
char s_fpack[11];
u_char s_dummy2[24];
u_char s_uuid[16];
char s_label[16];
};
#define JFS_SUPER1_OFF 0x8000
#define JFS_MAGIC "JFS1"
struct sysv_super_block {
u_char s_dummy1[504];
u_char s_magic[4];
u_char type[4];
};
#define sysvmagic(s) assemble4le(s.s_magic)
#define SYSV_SUPER_MAGIC 0xfd187e20
struct mdp_super_block {
u_char md_magic[4];
};
#define MD_SB_MAGIC 0xa92b4efc
#define mdsbmagic(s) assemble4le(s.md_magic)
struct ocfs_volume_header {
u_char minor_version[4];
u_char major_version[4];
u_char signature[128];
};
struct ocfs_volume_label {
u_char disk_lock[48];
u_char label[64];
u_char label_len[2];
};
#define ocfslabellen(o) assemble2le(o.label_len)
#define OCFS_MAGIC "OracleCFS"
static inline int
assemble2le(unsigned char *p) {
return (p[0] | (p[1] << 8));
}
static inline int
assemble4le(unsigned char *p) {
return (p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24));
}
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