1 0c98da8b 2005-07-13 devnull typedef struct Super Super;
  2 0c98da8b 2005-07-13 devnull typedef struct Group Group;
  3 0c98da8b 2005-07-13 devnull typedef struct Inode Inode;
  4 0c98da8b 2005-07-13 devnull typedef struct Dirent Dirent;
  5 0c98da8b 2005-07-13 devnull typedef struct Ext2 Ext2;
  6 0c98da8b 2005-07-13 devnull 
  7 0c98da8b 2005-07-13 devnull enum
  8 0c98da8b 2005-07-13 devnull {
  9 0c98da8b 2005-07-13 devnull 	BYTESPERSEC	= 512,
 10 0c98da8b 2005-07-13 devnull 
 11 0c98da8b 2005-07-13 devnull 	SBOFF = 1024,
 12 0c98da8b 2005-07-13 devnull 	SBSIZE = 1024,
 13 0c98da8b 2005-07-13 devnull 
 14 0c98da8b 2005-07-13 devnull 	SUPERMAGIC = 0xEF53,
 15 0c98da8b 2005-07-13 devnull 	MINBLOCKSIZE = 1024,
 16 0c98da8b 2005-07-13 devnull 	MAXBLOCKSIZE = 4096,
 17 0c98da8b 2005-07-13 devnull 	ROOTINODE = 2,
 18 0c98da8b 2005-07-13 devnull 	FIRSTINODE = 11,
 19 0c98da8b 2005-07-13 devnull 	VALIDFS = 0x0001,
 20 0c98da8b 2005-07-13 devnull 	ERRORFS = 0x0002,
 21 0c98da8b 2005-07-13 devnull 
 22 0c98da8b 2005-07-13 devnull 	NDIRBLOCKS = 12,
 23 0c98da8b 2005-07-13 devnull 	INDBLOCK = NDIRBLOCKS,
 24 0c98da8b 2005-07-13 devnull 	DINDBLOCK = INDBLOCK+1,
 25 0c98da8b 2005-07-13 devnull 	TINDBLOCK = DINDBLOCK+1,
 26 0c98da8b 2005-07-13 devnull 	NBLOCKS = TINDBLOCK+1,
 27 0c98da8b 2005-07-13 devnull 
 28 0c98da8b 2005-07-13 devnull 	NAMELEN = 255,
 29 0c98da8b 2005-07-13 devnull 
 30 0c98da8b 2005-07-13 devnull 	/* permissions in Inode.mode */
 31 0c98da8b 2005-07-13 devnull 	IEXEC = 00100,
 32 0c98da8b 2005-07-13 devnull 	IWRITE = 0200,
 33 0c98da8b 2005-07-13 devnull 	IREAD = 0400,
 34 0c98da8b 2005-07-13 devnull 	ISVTX = 01000,
 35 0c98da8b 2005-07-13 devnull 	ISGID = 02000,
 36 0c98da8b 2005-07-13 devnull 	ISUID = 04000,
 37 0c98da8b 2005-07-13 devnull 
 38 0c98da8b 2005-07-13 devnull 	/* type in Inode.mode */
 39 0c98da8b 2005-07-13 devnull 	IFMT = 0170000,
 40 0c98da8b 2005-07-13 devnull 	IFIFO = 0010000,
 41 0c98da8b 2005-07-13 devnull 	IFCHR = 0020000,
 42 0c98da8b 2005-07-13 devnull 	IFDIR = 0040000,
 43 0c98da8b 2005-07-13 devnull 	IFBLK = 0060000,
 44 0c98da8b 2005-07-13 devnull 	IFREG = 0100000,
 45 0c98da8b 2005-07-13 devnull 	IFLNK = 0120000,
 46 0c98da8b 2005-07-13 devnull 	IFSOCK = 0140000,
 47 cbeb0b26 2006-04-01 devnull 	IFWHT = 0160000
 48 0c98da8b 2005-07-13 devnull };
 49 0c98da8b 2005-07-13 devnull 
 50 0c98da8b 2005-07-13 devnull #define DIRLEN(namlen)	(((namlen)+8+3)&~3)
 51 0c98da8b 2005-07-13 devnull 
 52 0c98da8b 2005-07-13 devnull 
 53 0c98da8b 2005-07-13 devnull /*
 54 0c98da8b 2005-07-13 devnull  * Super block on-disk format.
 55 0c98da8b 2005-07-13 devnull  */
 56 0c98da8b 2005-07-13 devnull struct Super
 57 0c98da8b 2005-07-13 devnull {
 58 0c98da8b 2005-07-13 devnull 	u32int	ninode;		/* Inodes count */
 59 0c98da8b 2005-07-13 devnull 	u32int	nblock;		/* Blocks count */
 60 0c98da8b 2005-07-13 devnull 	u32int	rblockcount;	/* Reserved blocks count */
 61 0c98da8b 2005-07-13 devnull 	u32int	freeblockcount;	/* Free blocks count */
 62 0c98da8b 2005-07-13 devnull 	u32int	freeinodecount;	/* Free inodes count */
 63 0c98da8b 2005-07-13 devnull 	u32int	firstdatablock;	/* First Data Block */
 64 0c98da8b 2005-07-13 devnull 	u32int	logblocksize;	/* Block size */
 65 0c98da8b 2005-07-13 devnull 	u32int	logfragsize;	/* Fragment size */
 66 0c98da8b 2005-07-13 devnull 	u32int	blockspergroup;	/* # Blocks per group */
 67 0c98da8b 2005-07-13 devnull 	u32int	fragpergroup;	/* # Fragments per group */
 68 0c98da8b 2005-07-13 devnull 	u32int	inospergroup;	/* # Inodes per group */
 69 0c98da8b 2005-07-13 devnull 	u32int	mtime;		/* Mount time */
 70 0c98da8b 2005-07-13 devnull 	u32int	wtime;		/* Write time */
 71 0c98da8b 2005-07-13 devnull 	u16int	mntcount;		/* Mount count */
 72 0c98da8b 2005-07-13 devnull 	u16int	maxmntcount;	/* Maximal mount count */
 73 0c98da8b 2005-07-13 devnull 	u16int	magic;		/* Magic signature */
 74 0c98da8b 2005-07-13 devnull 	u16int	state;		/* File system state */
 75 0c98da8b 2005-07-13 devnull 	u16int	errors;		/* Behaviour when detecting errors */
 76 0c98da8b 2005-07-13 devnull 	u16int	pad;
 77 0c98da8b 2005-07-13 devnull 	u32int	lastcheck;		/* time of last check */
 78 0c98da8b 2005-07-13 devnull 	u32int	checkinterval;	/* max. time between checks */
 79 0c98da8b 2005-07-13 devnull 	u32int	creatoros;		/* OS */
 80 0c98da8b 2005-07-13 devnull 	u32int	revlevel;		/* Revision level */
 81 0c98da8b 2005-07-13 devnull 	u16int	defresuid;		/* Default uid for reserved blocks */
 82 0c98da8b 2005-07-13 devnull 	u16int	defresgid;		/* Default gid for reserved blocks */
 83 0c98da8b 2005-07-13 devnull 	u32int	reserved[235];	/* Padding to the end of the block */
 84 0c98da8b 2005-07-13 devnull };
 85 0c98da8b 2005-07-13 devnull 
 86 0c98da8b 2005-07-13 devnull /*
 87 b109049f 2007-03-25 devnull  * Block group on-disk format.
 88 0c98da8b 2005-07-13 devnull  */
 89 0c98da8b 2005-07-13 devnull struct Group
 90 0c98da8b 2005-07-13 devnull {
 91 0c98da8b 2005-07-13 devnull 	u32int	bitblock;		/* Blocks bitmap block */
 92 0c98da8b 2005-07-13 devnull 	u32int	inodebitblock;		/* Inodes bitmap block */
 93 0c98da8b 2005-07-13 devnull 	u32int	inodeaddr;		/* Inodes table block */
 94 0c98da8b 2005-07-13 devnull 	u16int	freeblockscount;	/* Free blocks count */
 95 0c98da8b 2005-07-13 devnull 	u16int	freeinodescount;	/* Free inodes count */
 96 0c98da8b 2005-07-13 devnull 	u16int	useddirscount;	/* Directories count */
 97 0c98da8b 2005-07-13 devnull 	u16int	pad;
 98 0c98da8b 2005-07-13 devnull 	u32int	reserved[3];
 99 0c98da8b 2005-07-13 devnull };
100 0c98da8b 2005-07-13 devnull enum
101 0c98da8b 2005-07-13 devnull {
102 0c98da8b 2005-07-13 devnull 	GroupSize = 32
103 0c98da8b 2005-07-13 devnull };
104 0c98da8b 2005-07-13 devnull 
105 0c98da8b 2005-07-13 devnull /*
106 0c98da8b 2005-07-13 devnull  * Structure of an inode on the disk
107 0c98da8b 2005-07-13 devnull  */
108 0c98da8b 2005-07-13 devnull struct Inode
109 0c98da8b 2005-07-13 devnull {
110 0c98da8b 2005-07-13 devnull 	u16int	mode;		/* File mode */
111 0c98da8b 2005-07-13 devnull 	u16int	uid;		/* Owner Uid */
112 0c98da8b 2005-07-13 devnull 	u32int	size;		/* Size in bytes */
113 0c98da8b 2005-07-13 devnull 	u32int	atime;		/* Access time */
114 0c98da8b 2005-07-13 devnull 	u32int	ctime;		/* Creation time */
115 0c98da8b 2005-07-13 devnull 	u32int	mtime;		/* Modification time */
116 0c98da8b 2005-07-13 devnull 	u32int	dtime;		/* Deletion Time */
117 0c98da8b 2005-07-13 devnull 	u16int	gid;		/* Group Id */
118 0c98da8b 2005-07-13 devnull 	u16int	nlink;	/* Links count */
119 0c98da8b 2005-07-13 devnull 	u32int	nblock;	/* Blocks count */
120 0c98da8b 2005-07-13 devnull 	u32int	flags;		/* File flags */
121 0c98da8b 2005-07-13 devnull 	u32int	osd1;				
122 0c98da8b 2005-07-13 devnull 	u32int	block[NBLOCKS];/* Pointers to blocks */
123 0c98da8b 2005-07-13 devnull 	u32int	version;	/* File version (for NFS) */
124 0c98da8b 2005-07-13 devnull 	u32int	fileacl;	/* File ACL */
125 b109049f 2007-03-25 devnull 	u32int	diracl;	/* Directory ACL or high size bits */
126 0c98da8b 2005-07-13 devnull 	u32int	faddr;		/* Fragment address */
127 0c98da8b 2005-07-13 devnull 	uchar	osd2[12];
128 0c98da8b 2005-07-13 devnull };
129 0c98da8b 2005-07-13 devnull enum
130 0c98da8b 2005-07-13 devnull {
131 0c98da8b 2005-07-13 devnull 	InodeSize = 128
132 0c98da8b 2005-07-13 devnull };
133 0c98da8b 2005-07-13 devnull 
134 0c98da8b 2005-07-13 devnull /*
135 0c98da8b 2005-07-13 devnull  * Directory entry on-disk structure.
136 0c98da8b 2005-07-13 devnull  */
137 0c98da8b 2005-07-13 devnull struct Dirent
138 0c98da8b 2005-07-13 devnull {
139 0c98da8b 2005-07-13 devnull 	u32int	ino;			/* Inode number */
140 0c98da8b 2005-07-13 devnull 	u16int	reclen;		/* Directory entry length */
141 0c98da8b 2005-07-13 devnull 	u8int	namlen;		/* Name length */
142 0c98da8b 2005-07-13 devnull 	u8int	pad;
143 0c98da8b 2005-07-13 devnull 	char	name[NAMELEN];	/* File name */
144 0c98da8b 2005-07-13 devnull };
145 0c98da8b 2005-07-13 devnull enum
146 0c98da8b 2005-07-13 devnull {
147 cbeb0b26 2006-04-01 devnull 	MinDirentSize = 4+2+1+1
148 0c98da8b 2005-07-13 devnull };
149 0c98da8b 2005-07-13 devnull 
150 0c98da8b 2005-07-13 devnull /*
151 0c98da8b 2005-07-13 devnull  * In-core fs info.
152 0c98da8b 2005-07-13 devnull  */
153 0c98da8b 2005-07-13 devnull struct Ext2
154 0c98da8b 2005-07-13 devnull {
155 0c98da8b 2005-07-13 devnull 	uint	blocksize;
156 0c98da8b 2005-07-13 devnull 	uint	nblock;
157 0c98da8b 2005-07-13 devnull 	uint	ngroup;
158 0c98da8b 2005-07-13 devnull 	uint	inospergroup;
159 0c98da8b 2005-07-13 devnull 	uint	blockspergroup;
160 0c98da8b 2005-07-13 devnull 	uint	inosperblock;
161 0c98da8b 2005-07-13 devnull 	uint	groupaddr;
162 0c98da8b 2005-07-13 devnull 	uint	descperblock;
163 0c98da8b 2005-07-13 devnull 	uint	firstblock;
164 0c98da8b 2005-07-13 devnull 	Disk *disk;
165 0c98da8b 2005-07-13 devnull 	Fsys *fsys;
166 0c98da8b 2005-07-13 devnull };
167 0c98da8b 2005-07-13 devnull