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 079f5e94 2020-05-19 rsc 	/* some systems have these defined */
 31 079f5e94 2020-05-19 rsc 	#undef IEXEC
 32 079f5e94 2020-05-19 rsc 	#undef IWRITE
 33 079f5e94 2020-05-19 rsc 	#undef IREAD
 34 079f5e94 2020-05-19 rsc 	#undef ISVTX
 35 079f5e94 2020-05-19 rsc 	#undef ISGID
 36 079f5e94 2020-05-19 rsc 	#undef ISUID
 37 079f5e94 2020-05-19 rsc 	#undef IFMT
 38 079f5e94 2020-05-19 rsc 	#undef IFIFO
 39 079f5e94 2020-05-19 rsc 	#undef IFCHR
 40 079f5e94 2020-05-19 rsc 	#undef IFDIR
 41 079f5e94 2020-05-19 rsc 	#undef IFBLK
 42 079f5e94 2020-05-19 rsc 	#undef IFREG
 43 079f5e94 2020-05-19 rsc 	#undef IFLNK
 44 079f5e94 2020-05-19 rsc 	#undef IFSOCK
 45 079f5e94 2020-05-19 rsc 	#undef IFWHT
 46 079f5e94 2020-05-19 rsc 
 47 079f5e94 2020-05-19 rsc 	#define IEXEC	EXT2_IEXEC
 48 079f5e94 2020-05-19 rsc 	#define IWRITE	EXT2_IWRITE
 49 079f5e94 2020-05-19 rsc 	#define IREAD	EXT2_IREAD
 50 079f5e94 2020-05-19 rsc 	#define ISVTX	EXT2_ISVTX
 51 079f5e94 2020-05-19 rsc 	#define ISGID	EXT2_ISGID
 52 079f5e94 2020-05-19 rsc 	#define ISUID	EXT2_ISUID
 53 079f5e94 2020-05-19 rsc 	#define IFMT	EXT2_IFMT
 54 079f5e94 2020-05-19 rsc 	#define IFIFO	EXT2_IFIFO
 55 079f5e94 2020-05-19 rsc 	#define IFCHR	EXT2_IFCHR
 56 079f5e94 2020-05-19 rsc 	#define IFDIR	EXT2_IFDIR
 57 079f5e94 2020-05-19 rsc 	#define IFBLK	EXT2_IFBLK
 58 079f5e94 2020-05-19 rsc 	#define IFREG	EXT2_IFREG
 59 079f5e94 2020-05-19 rsc 	#define IFLNK	EXT2_IFLNK
 60 079f5e94 2020-05-19 rsc 	#define IFSOCK	EXT2_IFSOCK
 61 079f5e94 2020-05-19 rsc 	#define IFWHT	EXT2_IFWHT
 62 079f5e94 2020-05-19 rsc 
 63 0c98da8b 2005-07-13 devnull 	/* permissions in Inode.mode */
 64 0c98da8b 2005-07-13 devnull 	IEXEC = 00100,
 65 0c98da8b 2005-07-13 devnull 	IWRITE = 0200,
 66 0c98da8b 2005-07-13 devnull 	IREAD = 0400,
 67 0c98da8b 2005-07-13 devnull 	ISVTX = 01000,
 68 0c98da8b 2005-07-13 devnull 	ISGID = 02000,
 69 0c98da8b 2005-07-13 devnull 	ISUID = 04000,
 70 0c98da8b 2005-07-13 devnull 
 71 0c98da8b 2005-07-13 devnull 	/* type in Inode.mode */
 72 0c98da8b 2005-07-13 devnull 	IFMT = 0170000,
 73 0c98da8b 2005-07-13 devnull 	IFIFO = 0010000,
 74 0c98da8b 2005-07-13 devnull 	IFCHR = 0020000,
 75 0c98da8b 2005-07-13 devnull 	IFDIR = 0040000,
 76 0c98da8b 2005-07-13 devnull 	IFBLK = 0060000,
 77 0c98da8b 2005-07-13 devnull 	IFREG = 0100000,
 78 0c98da8b 2005-07-13 devnull 	IFLNK = 0120000,
 79 0c98da8b 2005-07-13 devnull 	IFSOCK = 0140000,
 80 cbeb0b26 2006-04-01 devnull 	IFWHT = 0160000
 81 0c98da8b 2005-07-13 devnull };
 82 0c98da8b 2005-07-13 devnull 
 83 0c98da8b 2005-07-13 devnull #define DIRLEN(namlen)	(((namlen)+8+3)&~3)
 84 0c98da8b 2005-07-13 devnull 
 85 0c98da8b 2005-07-13 devnull 
 86 0c98da8b 2005-07-13 devnull /*
 87 83ab7d88 2007-11-27 rsc  * Super block
 88 0c98da8b 2005-07-13 devnull  */
 89 0c98da8b 2005-07-13 devnull struct Super
 90 0c98da8b 2005-07-13 devnull {
 91 0c98da8b 2005-07-13 devnull 	u32int	ninode;		/* Inodes count */
 92 0c98da8b 2005-07-13 devnull 	u32int	nblock;		/* Blocks count */
 93 0c98da8b 2005-07-13 devnull 	u32int	rblockcount;	/* Reserved blocks count */
 94 0c98da8b 2005-07-13 devnull 	u32int	freeblockcount;	/* Free blocks count */
 95 0c98da8b 2005-07-13 devnull 	u32int	freeinodecount;	/* Free inodes count */
 96 0c98da8b 2005-07-13 devnull 	u32int	firstdatablock;	/* First Data Block */
 97 0c98da8b 2005-07-13 devnull 	u32int	logblocksize;	/* Block size */
 98 0c98da8b 2005-07-13 devnull 	u32int	logfragsize;	/* Fragment size */
 99 0c98da8b 2005-07-13 devnull 	u32int	blockspergroup;	/* # Blocks per group */
100 0c98da8b 2005-07-13 devnull 	u32int	fragpergroup;	/* # Fragments per group */
101 0c98da8b 2005-07-13 devnull 	u32int	inospergroup;	/* # Inodes per group */
102 0c98da8b 2005-07-13 devnull 	u32int	mtime;		/* Mount time */
103 0c98da8b 2005-07-13 devnull 	u32int	wtime;		/* Write time */
104 0c98da8b 2005-07-13 devnull 	u16int	mntcount;		/* Mount count */
105 0c98da8b 2005-07-13 devnull 	u16int	maxmntcount;	/* Maximal mount count */
106 0c98da8b 2005-07-13 devnull 	u16int	magic;		/* Magic signature */
107 0c98da8b 2005-07-13 devnull 	u16int	state;		/* File system state */
108 0c98da8b 2005-07-13 devnull 	u16int	errors;		/* Behaviour when detecting errors */
109 0c98da8b 2005-07-13 devnull 	u16int	pad;
110 0c98da8b 2005-07-13 devnull 	u32int	lastcheck;		/* time of last check */
111 0c98da8b 2005-07-13 devnull 	u32int	checkinterval;	/* max. time between checks */
112 0c98da8b 2005-07-13 devnull 	u32int	creatoros;		/* OS */
113 0c98da8b 2005-07-13 devnull 	u32int	revlevel;		/* Revision level */
114 0c98da8b 2005-07-13 devnull 	u16int	defresuid;		/* Default uid for reserved blocks */
115 0c98da8b 2005-07-13 devnull 	u16int	defresgid;		/* Default gid for reserved blocks */
116 fa325e9b 2020-01-10 cross 
117 d29f5ece 2008-06-01 rsc 	/* the following are only available with revlevel = 1 */
118 d29f5ece 2008-06-01 rsc 	u32int	firstino;		/* First non-reserved inode */
119 d29f5ece 2008-06-01 rsc 	u16int	inosize;		/* size of inode structure */
120 d29f5ece 2008-06-01 rsc 	u16int	blockgroupnr;	/* block group # of this super block */
121 d29f5ece 2008-06-01 rsc 	u32int	reserved[233];	/* Padding to the end of the block */
122 0c98da8b 2005-07-13 devnull };
123 0c98da8b 2005-07-13 devnull 
124 0c98da8b 2005-07-13 devnull /*
125 83ab7d88 2007-11-27 rsc  * Block group
126 0c98da8b 2005-07-13 devnull  */
127 0c98da8b 2005-07-13 devnull struct Group
128 0c98da8b 2005-07-13 devnull {
129 0c98da8b 2005-07-13 devnull 	u32int	bitblock;		/* Blocks bitmap block */
130 0c98da8b 2005-07-13 devnull 	u32int	inodebitblock;		/* Inodes bitmap block */
131 0c98da8b 2005-07-13 devnull 	u32int	inodeaddr;		/* Inodes table block */
132 0c98da8b 2005-07-13 devnull 	u16int	freeblockscount;	/* Free blocks count */
133 0c98da8b 2005-07-13 devnull 	u16int	freeinodescount;	/* Free inodes count */
134 0c98da8b 2005-07-13 devnull 	u16int	useddirscount;	/* Directories count */
135 0c98da8b 2005-07-13 devnull };
136 0c98da8b 2005-07-13 devnull enum
137 0c98da8b 2005-07-13 devnull {
138 0c98da8b 2005-07-13 devnull 	GroupSize = 32
139 0c98da8b 2005-07-13 devnull };
140 0c98da8b 2005-07-13 devnull 
141 0c98da8b 2005-07-13 devnull /*
142 83ab7d88 2007-11-27 rsc  * Inode
143 0c98da8b 2005-07-13 devnull  */
144 0c98da8b 2005-07-13 devnull struct Inode
145 0c98da8b 2005-07-13 devnull {
146 0c98da8b 2005-07-13 devnull 	u16int	mode;		/* File mode */
147 0c98da8b 2005-07-13 devnull 	u16int	uid;		/* Owner Uid */
148 0c98da8b 2005-07-13 devnull 	u32int	size;		/* Size in bytes */
149 0c98da8b 2005-07-13 devnull 	u32int	atime;		/* Access time */
150 0c98da8b 2005-07-13 devnull 	u32int	ctime;		/* Creation time */
151 0c98da8b 2005-07-13 devnull 	u32int	mtime;		/* Modification time */
152 0c98da8b 2005-07-13 devnull 	u32int	dtime;		/* Deletion Time */
153 0c98da8b 2005-07-13 devnull 	u16int	gid;		/* Group Id */
154 0c98da8b 2005-07-13 devnull 	u16int	nlink;	/* Links count */
155 0c98da8b 2005-07-13 devnull 	u32int	nblock;	/* Blocks count */
156 0c98da8b 2005-07-13 devnull 	u32int	flags;		/* File flags */
157 0c98da8b 2005-07-13 devnull 	u32int	block[NBLOCKS];/* Pointers to blocks */
158 0c98da8b 2005-07-13 devnull 	u32int	version;	/* File version (for NFS) */
159 0c98da8b 2005-07-13 devnull 	u32int	fileacl;	/* File ACL */
160 b109049f 2007-03-25 devnull 	u32int	diracl;	/* Directory ACL or high size bits */
161 0c98da8b 2005-07-13 devnull 	u32int	faddr;		/* Fragment address */
162 0c98da8b 2005-07-13 devnull };
163 0c98da8b 2005-07-13 devnull 
164 0c98da8b 2005-07-13 devnull /*
165 83ab7d88 2007-11-27 rsc  * Directory entry
166 0c98da8b 2005-07-13 devnull  */
167 0c98da8b 2005-07-13 devnull struct Dirent
168 0c98da8b 2005-07-13 devnull {
169 0c98da8b 2005-07-13 devnull 	u32int	ino;			/* Inode number */
170 0c98da8b 2005-07-13 devnull 	u16int	reclen;		/* Directory entry length */
171 0c98da8b 2005-07-13 devnull 	u8int	namlen;		/* Name length */
172 83ab7d88 2007-11-27 rsc 	char	*name;	/* File name */
173 0c98da8b 2005-07-13 devnull };
174 0c98da8b 2005-07-13 devnull enum
175 0c98da8b 2005-07-13 devnull {
176 cbeb0b26 2006-04-01 devnull 	MinDirentSize = 4+2+1+1
177 0c98da8b 2005-07-13 devnull };
178 0c98da8b 2005-07-13 devnull 
179 0c98da8b 2005-07-13 devnull /*
180 0c98da8b 2005-07-13 devnull  * In-core fs info.
181 0c98da8b 2005-07-13 devnull  */
182 0c98da8b 2005-07-13 devnull struct Ext2
183 0c98da8b 2005-07-13 devnull {
184 0c98da8b 2005-07-13 devnull 	uint	blocksize;
185 0c98da8b 2005-07-13 devnull 	uint	nblock;
186 0c98da8b 2005-07-13 devnull 	uint	ngroup;
187 0c98da8b 2005-07-13 devnull 	uint	inospergroup;
188 0c98da8b 2005-07-13 devnull 	uint	blockspergroup;
189 0c98da8b 2005-07-13 devnull 	uint	inosperblock;
190 d29f5ece 2008-06-01 rsc 	uint	inosize;
191 0c98da8b 2005-07-13 devnull 	uint	groupaddr;
192 0c98da8b 2005-07-13 devnull 	uint	descperblock;
193 0c98da8b 2005-07-13 devnull 	uint	firstblock;
194 0c98da8b 2005-07-13 devnull 	Disk *disk;
195 0c98da8b 2005-07-13 devnull 	Fsys *fsys;
196 0c98da8b 2005-07-13 devnull };