[thirdparty/util-linux.git] / mount / linux_fs.h

/* 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)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8))

#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)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8))

#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)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8))

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)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
			(((uint) s.s_magic[2]) << 16) + \
			(((uint) s.s_magic[3]) << 24))

/* From jj@sunsite.ms.mff.cuni.cz Mon Mar 23 15:19:05 1998 */
#define UFS_SUPER_MAGIC 0x00011954
struct ufs_super_block {
    u_char     s_dummy[0x55c];
    u_char     s_magic[4];
};
#define ufsmagic(s)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
			 (((uint) s.s_magic[2]) << 16) + \
			 (((uint) s.s_magic[3]) << 24))

/* 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
struct cramfs_super_block {
	u_char    s_magic[4];
	u_char    s_dummy[12];
	u_char    s_id[16];
};
#define cramfsmagic(s)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
			 (((uint) s.s_magic[2]) << 16) + \
			 (((uint) s.s_magic[3]) << 24))

#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)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8))
#define hfsblksize(s)	((uint) s.s_blksize[0] + \
			 (((uint) s.s_blksize[1]) << 8) + \
			 (((uint) s.s_blksize[2]) << 16) + \
			 (((uint) s.s_blksize[3]) << 24))

#define HPFS_SUPER_MAGIC 0xf995e849
struct hpfs_super_block {
	u_char    s_magic[4];
	u_char    s_magic2[4];
};
#define hpfsmagic(s)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
			 (((uint) s.s_magic[2]) << 16) + \
			 (((uint) s.s_magic[3]) << 24))

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)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
			 (((uint) s.s_magic[2]) << 16) + \
			 (((uint) s.s_magic[3]) << 24))
#define VXFS_SUPER_MAGIC 0xa501FCF5

struct jfs_super_block {
	char s_magic[4];
};
#define JFS_SUPER1_OFF 0x8000
#define JFS_MAGIC "JFS1"

#define SYSV_SUPER_MAGIC	0xfd187e20

struct sysv_super_block {
	u_char  s_dummy1[504];
	u_char  s_magic[4];
	u_char  type[4];
};

#define sysvmagic(s)	((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
			 (((uint) s.s_magic[2]) << 16) + \
			 (((uint) s.s_magic[3]) << 24))
Commit	Line	Data
2b6fc908 KZ	1	/* Including <linux/fs.h> became more and more painful.
	2	Below a very abbreviated version of some declarations,
	3	only designed to be able to check a magic number
	4	in case no filesystem type was given. */
	5
	6	#ifndef BLKGETSIZE
5c36a0eb KZ	7	#ifndef _IO
5c36a0eb KZ	8	/* pre-1.3.45 */
2b6fc908	9	#define BLKGETSIZE 0x1260 /* return device size */
5c36a0eb KZ	10	#else
	11	/* same on i386, m68k, arm; different on alpha, mips, sparc, ppc */
	12	#define BLKGETSIZE _IO(0x12,96)
	13	#endif
2b6fc908 KZ	14	#endif
2b6fc908 KZ	15
612721db KZ	16	#define MINIX_SUPER_MAGIC 0x137F /* minix v1, 14 char names */
	17	#define MINIX_SUPER_MAGIC2 0x138F /* minix v1, 30 char names */
	18	#define MINIX2_SUPER_MAGIC 0x2468 /* minix v2, 14 char names */
	19	#define MINIX2_SUPER_MAGIC2 0x2478 /* minix v2, 30 char names */
2b6fc908 KZ	20	struct minix_super_block {
	21	u_char s_dummy[16];
	22	u_char s_magic[2];
	23	};
	24	#define minixmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8))
	25
	26	#define ISODCL(from, to) (to - from + 1)
	27	#define ISO_STANDARD_ID "CD001"
	28	struct iso_volume_descriptor {
	29	char type[ISODCL(1,1)]; /* 711 */
	30	char id[ISODCL(2,6)];
	31	char version[ISODCL(7,7)];
	32	char data[ISODCL(8,2048)];
	33	};
	34
	35	#define HS_STANDARD_ID "CDROM"
	36	struct hs_volume_descriptor {
	37	char foo[ISODCL ( 1, 8)]; /* 733 */
	38	char type[ISODCL ( 9, 9)]; /* 711 */
	39	char id[ISODCL ( 10, 14)];
	40	char version[ISODCL ( 15, 15)]; /* 711 */
	41	char data[ISODCL(16,2048)];
	42	};
	43
	44	#define EXT_SUPER_MAGIC 0x137D
	45	struct ext_super_block {
	46	u_char s_dummy[56];
	47	u_char s_magic[2];
	48	};
	49	#define extmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8))
	50
	51	#define EXT2_PRE_02B_MAGIC 0xEF51
	52	#define EXT2_SUPER_MAGIC 0xEF53
364cda48	53	#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
2b6fc908	54	struct ext2_super_block {
364cda48 KZ	55	u_char s_dummy1[56];
	56	u_char s_magic[2];
	57	u_char s_dummy2[34];
	58	u_char s_feature_compat[4];
	59	u_char s_feature_incompat[4];
	60	u_char s_feature_ro_compat[4];
	61	u_char s_uuid[16];
	62	u_char s_volume_name[16];
	63	u_char s_dummy3[88];
	64	u_char s_journal_inum[4]; /* ext3 only */
2b6fc908 KZ	65	};
	66	#define ext2magic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8))
	67
e8f26419 KZ	68	struct reiserfs_super_block
	69	{
	70	u_char s_block_count[4];
	71	u_char s_free_blocks[4];
	72	u_char s_root_block[4];
	73	u_char s_journal_block[4];
	74	u_char s_journal_dev[4];
	75	u_char s_orig_journal_size[4];
	76	u_char s_journal_trans_max[4];
	77	u_char s_journal_block_count[4];
	78	u_char s_journal_max_batch[4];
	79	u_char s_journal_max_commit_age[4];
	80	u_char s_journal_max_trans_age[4];
	81	u_char s_blocksize[2];
	82	u_char s_oid_maxsize[2];
	83	u_char s_oid_cursize[2];
	84	u_char s_state[2];
	85	u_char s_magic[12];
	86	};
	87	#define REISERFS_SUPER_MAGIC_STRING "ReIsErFs"
	88	#define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs"
	89	#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
	90	/* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */
	91	#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024)
	92
2b6fc908 KZ	93	#define _XIAFS_SUPER_MAGIC 0x012FD16D
	94	struct xiafs_super_block {
	95	u_char s_boot_segment[512]; /* 1st sector reserved for boot */
	96	u_char s_dummy[60];
	97	u_char s_magic[4];
	98	};
	99	#define xiafsmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
	100	(((uint) s.s_magic[2]) << 16) + \
	101	(((uint) s.s_magic[3]) << 24))
5c36a0eb KZ	102
	103	/* From jj@sunsite.ms.mff.cuni.cz Mon Mar 23 15:19:05 1998 */
	104	#define UFS_SUPER_MAGIC 0x00011954
	105	struct ufs_super_block {
	106	u_char s_dummy[0x55c];
	107	u_char s_magic[4];
	108	};
	109	#define ufsmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
	110	(((uint) s.s_magic[2]) << 16) + \
	111	(((uint) s.s_magic[3]) << 24))
7eda085c KZ	112
	113	/* From Richard.Russon@ait.co.uk Wed Feb 24 08:05:27 1999 */
	114	#define NTFS_SUPER_MAGIC "NTFS"
	115	struct ntfs_super_block {
	116	u_char s_dummy[3];
	117	u_char s_magic[4];
	118	};
	119
	120	/* From inspection of a few FAT filesystems - aeb */
	121	/* Unfortunately I find almost the same thing on an extended partition;
	122	it looks like a primary has some directory entries where the extended
	123	has a partition table: IO.SYS, MSDOS.SYS, WINBOOT.SYS */
	124	struct fat_super_block {
	125	u_char s_dummy[3];
	126	u_char s_os[8]; /* "MSDOS5.0" or "MSWIN4.0" or "MSWIN4.1" */
eb63b9b8	127	/* mtools-3.9.4 writes "MTOOL394" */
7eda085c KZ	128	u_char s_dummy2[32];
	129	u_char s_label[11]; /* for DOS? */
	130	u_char s_fs[8]; /* "FAT12 " or "FAT16 " or all zero */
	131	/* OS/2 BM has "FAT " here. */
	132	u_char s_dummy3[9];
	133	u_char s_label2[11]; /* for Windows? */
	134	u_char s_fs2[8]; /* garbage or "FAT32 " */
	135	};
66ee8158 KZ	136
66ee8158 KZ	137	#define XFS_SUPER_MAGIC "XFSB"
66ee8158 KZ	138	struct xfs_super_block {
	139	u_char s_magic[4];
	140	u_char s_dummy[28];
	141	u_char s_uuid[16];
	142	u_char s_dummy2[60];
	143	u_char s_fname[12];
	144	};
	145
	146	#define CRAMFS_SUPER_MAGIC 0x28cd3d45
	147	struct cramfs_super_block {
	148	u_char s_magic[4];
	149	u_char s_dummy[12];
	150	u_char s_id[16];
	151	};
	152	#define cramfsmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
	153	(((uint) s.s_magic[2]) << 16) + \
	154	(((uint) s.s_magic[3]) << 24))
	155
	156	#define HFS_SUPER_MAGIC 0x4244
	157	struct hfs_super_block {
	158	u_char s_magic[2];
	159	u_char s_dummy[18];
	160	u_char s_blksize[4];
	161	};
	162	#define hfsmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8))
	163	#define hfsblksize(s) ((uint) s.s_blksize[0] + \
	164	(((uint) s.s_blksize[1]) << 8) + \
	165	(((uint) s.s_blksize[2]) << 16) + \
	166	(((uint) s.s_blksize[3]) << 24))
	167
	168	#define HPFS_SUPER_MAGIC 0xf995e849
	169	struct hpfs_super_block {
	170	u_char s_magic[4];
	171	u_char s_magic2[4];
	172	};
	173	#define hpfsmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
	174	(((uint) s.s_magic[2]) << 16) + \
	175	(((uint) s.s_magic[3]) << 24))
	176
	177	struct adfs_super_block {
	178	u_char s_dummy[448];
	179	u_char s_blksize[1];
	180	u_char s_dummy2[62];
	181	u_char s_checksum[1];
	182	};
	183	#define adfsblksize(s) ((uint) s.s_blksize[0])
e8f26419 KZ	184
	185	/* found in first 4 bytes of block 1 */
	186	struct vxfs_super_block {
	187	u_char s_magic[4];
	188	};
	189	#define vxfsmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
	190	(((uint) s.s_magic[2]) << 16) + \
	191	(((uint) s.s_magic[3]) << 24))
	192	#define VXFS_SUPER_MAGIC 0xa501FCF5
	193
	194	struct jfs_super_block {
	195	char s_magic[4];
	196	};
	197	#define JFS_SUPER1_OFF 0x8000
	198	#define JFS_MAGIC "JFS1"
	199
	200	#define SYSV_SUPER_MAGIC 0xfd187e20
	201
	202	struct sysv_super_block {
	203	u_char s_dummy1[504];
	204	u_char s_magic[4];
	205	u_char type[4];
	206	};
	207
	208	#define sysvmagic(s) ((uint) s.s_magic[0] + (((uint) s.s_magic[1]) << 8) + \
	209	(((uint) s.s_magic[2]) << 16) + \
	210	(((uint) s.s_magic[3]) << 24))