kinit/fstype/ext3_fs.h

#ifndef __EXT3_FS_H
#define __EXT3_FS_H

/*
 * The second extended file system magic number
 */
#define EXT3_SUPER_MAGIC        0xEF53

#define EXT2_FLAGS_TEST_FILESYS                 0x0004
#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER     0x0001
#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE       0x0002
#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR        0x0004
#define EXT2_FEATURE_INCOMPAT_FILETYPE          0x0002
#define EXT2_FEATURE_INCOMPAT_META_BG           0x0010
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL         0x0004
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV       0x0008
#define EXT3_FEATURE_INCOMPAT_RECOVER           0x0004

#define EXT3_FEATURE_INCOMPAT_EXTENTS           0x0040
#define EXT4_FEATURE_INCOMPAT_64BIT             0x0080
#define EXT4_FEATURE_INCOMPAT_MMP               0x0100

#define EXT3_FEATURE_RO_COMPAT_SUPP     (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
					 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
					 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
#define EXT3_FEATURE_RO_COMPAT_UNSUPPORTED      ~EXT3_FEATURE_RO_COMPAT_SUPP
#define EXT3_FEATURE_INCOMPAT_SUPP      (EXT2_FEATURE_INCOMPAT_FILETYPE| \
					 EXT3_FEATURE_INCOMPAT_RECOVER| \
					 EXT2_FEATURE_INCOMPAT_META_BG)
#define EXT3_FEATURE_INCOMPAT_UNSUPPORTED       ~EXT3_FEATURE_INCOMPAT_SUPP


/*
 * Structure of the super block
 */
struct ext3_super_block {
					/*00*/ __u32 s_inodes_count;
					/* Inodes count */
	__u32 s_blocks_count;	/* Blocks count */
	__u32 s_r_blocks_count;	/* Reserved blocks count */
	__u32 s_free_blocks_count;	/* Free blocks count */
						/*10*/ __u32 s_free_inodes_count;
						/* Free inodes count */
	__u32 s_first_data_block;	/* First Data Block */
	__u32 s_log_block_size;	/* Block size */
	__s32 s_log_frag_size;	/* Fragment size */
						/*20*/ __u32 s_blocks_per_group;
						/* # Blocks per group */
	__u32 s_frags_per_group;	/* # Fragments per group */
	__u32 s_inodes_per_group;	/* # Inodes per group */
	__u32 s_mtime;		/* Mount time */
				/*30*/ __u32 s_wtime;
				/* Write time */
	__u16 s_mnt_count;	/* Mount count */
	__s16 s_max_mnt_count;	/* Maximal mount count */
	__u16 s_magic;		/* Magic signature */
	__u16 s_state;		/* File system state */
	__u16 s_errors;		/* Behaviour when detecting errors */
	__u16 s_minor_rev_level;	/* minor revision level */
					/*40*/ __u32 s_lastcheck;
					/* time of last check */
	__u32 s_checkinterval;	/* max. time between checks */
	__u32 s_creator_os;	/* OS */
	__u32 s_rev_level;	/* Revision level */
					/*50*/ __u16 s_def_resuid;
					/* Default uid for reserved blocks */
	__u16 s_def_resgid;	/* Default gid for reserved blocks */
	/*
	 * These fields are for EXT3_DYNAMIC_REV superblocks only.
	 *
	 * Note: the difference between the compatible feature set and
	 * the incompatible feature set is that if there is a bit set
	 * in the incompatible feature set that the kernel doesn't
	 * know about, it should refuse to mount the filesystem.
	 *
	 * e2fsck's requirements are more strict; if it doesn't know
	 * about a feature in either the compatible or incompatible
	 * feature set, it must abort and not try to meddle with
	 * things it doesn't understand...
	 */
	__u32 s_first_ino;	/* First non-reserved inode */
	__u16 s_inode_size;	/* size of inode structure */
	__u16 s_block_group_nr;	/* block group # of this superblock */
	__u32 s_feature_compat;	/* compatible feature set */
						/*60*/ __u32 s_feature_incompat;
						/* incompatible feature set */
	__u32 s_feature_ro_compat;	/* readonly-compatible feature set */
				/*68*/ __u8 s_uuid[16];
				/* 128-bit uuid for volume */
					/*78*/ char s_volume_name[16];
					/* volume name */
					/*88*/ char s_last_mounted[64];
					/* directory where last mounted */
						/*C8*/ __u32 s_algorithm_usage_bitmap;
						/* For compression */
	/*
	 * Performance hints.  Directory preallocation should only
	 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
	 */
	__u8 s_prealloc_blocks;	/* Nr of blocks to try to preallocate */
	__u8 s_prealloc_dir_blocks;	/* Nr to preallocate for dirs */
	__u16 s_padding1;
	/*
	 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
	 */
					/*D0*/ __u8 s_journal_uuid[16];
					/* uuid of journal superblock */
					/*E0*/ __u32 s_journal_inum;
					/* inode number of journal file */
	__u32 s_journal_dev;	/* device number of journal file */
	__u32 s_last_orphan;	/* start of list of inodes to delete */
	__u32 s_hash_seed[4];	/* HTREE hash seed */
	__u8 s_def_hash_version;	/* Default hash version to use */
	__u8    s_jnl_backup_type;
	__u16   s_reserved_word_pad;
	__u32   s_default_mount_opts;
	__u32   s_first_meta_bg;
	__u32   s_mkfs_time;
	__u32   s_jnl_blocks[17];
	__u32   s_blocks_count_hi;
	__u32   s_r_blocks_count_hi;
	__u32   s_free_blocks_hi;
	__u16   s_min_extra_isize;
	__u16   s_want_extra_isize;
	__u32   s_flags;
	__u16   s_raid_stride;
	__u16   s_mmp_interval;
	__u64   s_mmp_block;
	__u32   s_raid_stripe_width;
	__u32   s_reserved[163];
};

#endif /* __EXT3_FS_H */
1	niro	815	#ifndef __EXT3_FS_H
2			#define __EXT3_FS_H
3
4	niro	532	/*
5			* The second extended file system magic number
6			*/
7			#define EXT3_SUPER_MAGIC 0xEF53
8
9	niro	815	#define EXT2_FLAGS_TEST_FILESYS 0x0004
10			#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
11			#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
12			#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
13			#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
14			#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
15	niro	532	#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
16	niro	815	#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
17			#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
18	niro	532
19	niro	815	#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040
20			#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
21			#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
22
23			#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER\| \
24			EXT2_FEATURE_RO_COMPAT_LARGE_FILE\| \
25			EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
26			#define EXT3_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT3_FEATURE_RO_COMPAT_SUPP
27			#define EXT3_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE\| \
28			EXT3_FEATURE_INCOMPAT_RECOVER\| \
29			EXT2_FEATURE_INCOMPAT_META_BG)
30			#define EXT3_FEATURE_INCOMPAT_UNSUPPORTED ~EXT3_FEATURE_INCOMPAT_SUPP
31
32
33
34	niro	532	/*
35			* Structure of the super block
36			*/
37			struct ext3_super_block {
38			/00/ __u32 s_inodes_count;
39			/* Inodes count */
40			__u32 s_blocks_count; /* Blocks count */
41			__u32 s_r_blocks_count; /* Reserved blocks count */
42			__u32 s_free_blocks_count; /* Free blocks count */
43			/10/ __u32 s_free_inodes_count;
44			/* Free inodes count */
45			__u32 s_first_data_block; /* First Data Block */
46			__u32 s_log_block_size; /* Block size */
47			__s32 s_log_frag_size; /* Fragment size */
48			/20/ __u32 s_blocks_per_group;
49			/* # Blocks per group */
50			__u32 s_frags_per_group; /* # Fragments per group */
51			__u32 s_inodes_per_group; /* # Inodes per group */
52			__u32 s_mtime; /* Mount time */
53			/30/ __u32 s_wtime;
54			/* Write time */
55			__u16 s_mnt_count; /* Mount count */
56			__s16 s_max_mnt_count; /* Maximal mount count */
57			__u16 s_magic; /* Magic signature */
58			__u16 s_state; /* File system state */
59			__u16 s_errors; /* Behaviour when detecting errors */
60			__u16 s_minor_rev_level; /* minor revision level */
61			/40/ __u32 s_lastcheck;
62			/* time of last check */
63			__u32 s_checkinterval; /* max. time between checks */
64			__u32 s_creator_os; /* OS */
65			__u32 s_rev_level; /* Revision level */
66			/50/ __u16 s_def_resuid;
67			/* Default uid for reserved blocks */
68			__u16 s_def_resgid; /* Default gid for reserved blocks */
69			/*
70			* These fields are for EXT3_DYNAMIC_REV superblocks only.
71			*
72			* Note: the difference between the compatible feature set and
73			* the incompatible feature set is that if there is a bit set
74			* in the incompatible feature set that the kernel doesn't
75			* know about, it should refuse to mount the filesystem.
76			*
77			* e2fsck's requirements are more strict; if it doesn't know
78			* about a feature in either the compatible or incompatible
79			* feature set, it must abort and not try to meddle with
80			* things it doesn't understand...
81			*/
82			__u32 s_first_ino; /* First non-reserved inode */
83			__u16 s_inode_size; /* size of inode structure */
84			__u16 s_block_group_nr; /* block group # of this superblock */
85			__u32 s_feature_compat; /* compatible feature set */
86			/60/ __u32 s_feature_incompat;
87			/* incompatible feature set */
88			__u32 s_feature_ro_compat; /* readonly-compatible feature set */
89			/68/ __u8 s_uuid[16];
90			/* 128-bit uuid for volume */
91			/78/ char s_volume_name[16];
92			/* volume name */
93			/88/ char s_last_mounted[64];
94			/* directory where last mounted */
95			/C8/ __u32 s_algorithm_usage_bitmap;
96			/* For compression */
97			/*
98			* Performance hints. Directory preallocation should only
99			* happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
100			*/
101			__u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate */
102			__u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
103			__u16 s_padding1;
104			/*
105			* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
106			*/
107			/D0/ __u8 s_journal_uuid[16];
108			/* uuid of journal superblock */
109			/E0/ __u32 s_journal_inum;
110			/* inode number of journal file */
111			__u32 s_journal_dev; /* device number of journal file */
112			__u32 s_last_orphan; /* start of list of inodes to delete */
113			__u32 s_hash_seed[4]; /* HTREE hash seed */
114			__u8 s_def_hash_version; /* Default hash version to use */
115	niro	815	__u8 s_jnl_backup_type;
116			__u16 s_reserved_word_pad;
117			__u32 s_default_mount_opts;
118			__u32 s_first_meta_bg;
119			__u32 s_mkfs_time;
120			__u32 s_jnl_blocks[17];
121			__u32 s_blocks_count_hi;
122			__u32 s_r_blocks_count_hi;
123			__u32 s_free_blocks_hi;
124			__u16 s_min_extra_isize;
125			__u16 s_want_extra_isize;
126			__u32 s_flags;
127			__u16 s_raid_stride;
128			__u16 s_mmp_interval;
129			__u64 s_mmp_block;
130			__u32 s_raid_stripe_width;
131			__u32 s_reserved[163];
132	niro	532	};
133	niro	815
134			#endif /* __EXT3_FS_H */