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1 /* 1 /*
2 * linux/include/linux/ext2_fs.h 2 * linux/include/linux/ext2_fs.h
3 * 3 *
4 * Copyright (C) 1992, 1993, 1994, 1995 4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr) 5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal 6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI) 7 * Universite Pierre et Marie Curie (Paris VI)
8 * 8 *
9 * from 9 * from
10 * 10 *
11 * linux/include/linux/minix_fs.h 11 * linux/include/linux/minix_fs.h
12 * 12 *
13 * Copyright (C) 1991, 1992 Linus Torvalds 13 * Copyright (C) 1991, 1992 Linus Torvalds
14 */ 14 */
15 15
16 #ifndef _LINUX_EXT2_FS_H 16 #ifndef _LINUX_EXT2_FS_H
17 #define _LINUX_EXT2_FS_H 17 #define _LINUX_EXT2_FS_H
18 18
19 #include <linux/types.h> 19 #include <linux/types.h>
20 #include <linux/magic.h> 20 #include <linux/magic.h>
21 21
22 /* 22 /*
23 * The second extended filesystem constants/st 23 * The second extended filesystem constants/structures
24 */ 24 */
25 25
26 /* 26 /*
27 * Define EXT2FS_DEBUG to produce debug messag 27 * Define EXT2FS_DEBUG to produce debug messages
28 */ 28 */
29 #undef EXT2FS_DEBUG 29 #undef EXT2FS_DEBUG
30 30
31 /* 31 /*
32 * Define EXT2_RESERVATION to reserve data blo 32 * Define EXT2_RESERVATION to reserve data blocks for expanding files
33 */ 33 */
34 #define EXT2_DEFAULT_RESERVE_BLOCKS 8 34 #define EXT2_DEFAULT_RESERVE_BLOCKS 8
35 /*max window size: 1024(direct blocks) + 3([t, 35 /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
36 #define EXT2_MAX_RESERVE_BLOCKS 1027 36 #define EXT2_MAX_RESERVE_BLOCKS 1027
37 #define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0 37 #define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
38 /* 38 /*
39 * The second extended file system version 39 * The second extended file system version
40 */ 40 */
41 #define EXT2FS_DATE "95/08/09" 41 #define EXT2FS_DATE "95/08/09"
42 #define EXT2FS_VERSION "0.5b" 42 #define EXT2FS_VERSION "0.5b"
43 43
44 /* 44 /*
45 * Debug code 45 * Debug code
46 */ 46 */
47 #ifdef EXT2FS_DEBUG 47 #ifdef EXT2FS_DEBUG
48 # define ext2_debug(f, a...) { \ 48 # define ext2_debug(f, a...) { \
49 printk 49 printk ("EXT2-fs DEBUG (%s, %d): %s:", \
50 !! 50 __FILE__, __LINE__, __func__); \
51 printk 51 printk (f, ## a); \
52 } 52 }
53 #else 53 #else
54 # define ext2_debug(f, a...) /**/ 54 # define ext2_debug(f, a...) /**/
55 #endif 55 #endif
56 56
57 /* 57 /*
58 * Special inode numbers 58 * Special inode numbers
59 */ 59 */
60 #define EXT2_BAD_INO 1 /* Bad 60 #define EXT2_BAD_INO 1 /* Bad blocks inode */
61 #define EXT2_ROOT_INO 2 /* Roo 61 #define EXT2_ROOT_INO 2 /* Root inode */
62 #define EXT2_BOOT_LOADER_INO 5 /* Boo 62 #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
63 #define EXT2_UNDEL_DIR_INO 6 /* Und 63 #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
64 64
65 /* First non-reserved inode for old ext2 files 65 /* First non-reserved inode for old ext2 filesystems */
66 #define EXT2_GOOD_OLD_FIRST_INO 11 66 #define EXT2_GOOD_OLD_FIRST_INO 11
67 67
68 #ifdef __KERNEL__ 68 #ifdef __KERNEL__
69 #include <linux/ext2_fs_sb.h> 69 #include <linux/ext2_fs_sb.h>
70 static inline struct ext2_sb_info *EXT2_SB(str 70 static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
71 { 71 {
72 return sb->s_fs_info; 72 return sb->s_fs_info;
73 } 73 }
74 #else 74 #else
75 /* Assume that user mode programs are passing 75 /* Assume that user mode programs are passing in an ext2fs superblock, not
76 * a kernel struct super_block. This will all 76 * a kernel struct super_block. This will allow us to call the feature-test
77 * macros from user land. */ 77 * macros from user land. */
78 #define EXT2_SB(sb) (sb) 78 #define EXT2_SB(sb) (sb)
79 #endif 79 #endif
80 80
81 /* 81 /*
82 * Maximal count of links to a file 82 * Maximal count of links to a file
83 */ 83 */
84 #define EXT2_LINK_MAX 32000 84 #define EXT2_LINK_MAX 32000
85 85
86 /* 86 /*
87 * Macro-instructions used to manage several b 87 * Macro-instructions used to manage several block sizes
88 */ 88 */
89 #define EXT2_MIN_BLOCK_SIZE 1024 89 #define EXT2_MIN_BLOCK_SIZE 1024
90 #define EXT2_MAX_BLOCK_SIZE 4096 90 #define EXT2_MAX_BLOCK_SIZE 4096
91 #define EXT2_MIN_BLOCK_LOG_SIZE 10 91 #define EXT2_MIN_BLOCK_LOG_SIZE 10
92 #ifdef __KERNEL__ 92 #ifdef __KERNEL__
93 # define EXT2_BLOCK_SIZE(s) ((s)-> 93 # define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
94 #else 94 #else
95 # define EXT2_BLOCK_SIZE(s) (EXT2_ 95 # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
96 #endif 96 #endif
97 #define EXT2_ADDR_PER_BLOCK(s) (EXT2_ 97 #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
98 #ifdef __KERNEL__ 98 #ifdef __KERNEL__
99 # define EXT2_BLOCK_SIZE_BITS(s) ((s)-> 99 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
100 #else 100 #else
101 # define EXT2_BLOCK_SIZE_BITS(s) ((s)-> 101 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
102 #endif 102 #endif
103 #ifdef __KERNEL__ 103 #ifdef __KERNEL__
104 #define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_ 104 #define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
105 #define EXT2_INODE_SIZE(s) (EXT2_ 105 #define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size)
106 #define EXT2_FIRST_INO(s) (EXT2_ 106 #define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino)
107 #else 107 #else
108 #define EXT2_INODE_SIZE(s) (((s)->s_rev_l 108 #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
109 EXT2_GOOD_OLD 109 EXT2_GOOD_OLD_INODE_SIZE : \
110 (s)->s_inode_ 110 (s)->s_inode_size)
111 #define EXT2_FIRST_INO(s) (((s)->s_rev_l 111 #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
112 EXT2_GOOD_OLD 112 EXT2_GOOD_OLD_FIRST_INO : \
113 (s)->s_first_ 113 (s)->s_first_ino)
114 #endif 114 #endif
115 115
116 /* 116 /*
117 * Macro-instructions used to manage fragments 117 * Macro-instructions used to manage fragments
118 */ 118 */
119 #define EXT2_MIN_FRAG_SIZE 1024 119 #define EXT2_MIN_FRAG_SIZE 1024
120 #define EXT2_MAX_FRAG_SIZE 4096 120 #define EXT2_MAX_FRAG_SIZE 4096
121 #define EXT2_MIN_FRAG_LOG_SIZE 10 121 #define EXT2_MIN_FRAG_LOG_SIZE 10
122 #ifdef __KERNEL__ 122 #ifdef __KERNEL__
123 # define EXT2_FRAG_SIZE(s) (EXT2_ 123 # define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size)
124 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_ 124 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block)
125 #else 125 #else
126 # define EXT2_FRAG_SIZE(s) (EXT2_ 126 # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
127 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_ 127 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
128 #endif 128 #endif
129 129
130 /* 130 /*
131 * Structure of a blocks group descriptor 131 * Structure of a blocks group descriptor
132 */ 132 */
133 struct ext2_group_desc 133 struct ext2_group_desc
134 { 134 {
135 __le32 bg_block_bitmap; 135 __le32 bg_block_bitmap; /* Blocks bitmap block */
136 __le32 bg_inode_bitmap; 136 __le32 bg_inode_bitmap; /* Inodes bitmap block */
137 __le32 bg_inode_table; /* Ino 137 __le32 bg_inode_table; /* Inodes table block */
138 __le16 bg_free_blocks_count; /* Fre 138 __le16 bg_free_blocks_count; /* Free blocks count */
139 __le16 bg_free_inodes_count; /* Fre 139 __le16 bg_free_inodes_count; /* Free inodes count */
140 __le16 bg_used_dirs_count; /* Dir 140 __le16 bg_used_dirs_count; /* Directories count */
141 __le16 bg_pad; 141 __le16 bg_pad;
142 __le32 bg_reserved[3]; 142 __le32 bg_reserved[3];
143 }; 143 };
144 144
145 /* 145 /*
146 * Macro-instructions used to manage group des 146 * Macro-instructions used to manage group descriptors
147 */ 147 */
148 #ifdef __KERNEL__ 148 #ifdef __KERNEL__
149 # define EXT2_BLOCKS_PER_GROUP(s) (EXT2_ 149 # define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
150 # define EXT2_DESC_PER_BLOCK(s) (EXT2_ 150 # define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block)
151 # define EXT2_INODES_PER_GROUP(s) (EXT2_ 151 # define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
152 # define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_ 152 # define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
153 #else 153 #else
154 # define EXT2_BLOCKS_PER_GROUP(s) ((s)-> 154 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
155 # define EXT2_DESC_PER_BLOCK(s) (EXT2_ 155 # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
156 # define EXT2_INODES_PER_GROUP(s) ((s)-> 156 # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
157 #endif 157 #endif
158 158
159 /* 159 /*
160 * Constants relative to the data blocks 160 * Constants relative to the data blocks
161 */ 161 */
162 #define EXT2_NDIR_BLOCKS 12 162 #define EXT2_NDIR_BLOCKS 12
163 #define EXT2_IND_BLOCK EXT2_N 163 #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
164 #define EXT2_DIND_BLOCK (EXT2_ 164 #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
165 #define EXT2_TIND_BLOCK (EXT2_ 165 #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
166 #define EXT2_N_BLOCKS (EXT2_ 166 #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
167 167
168 /* 168 /*
169 * Inode flags (GETFLAGS/SETFLAGS) 169 * Inode flags (GETFLAGS/SETFLAGS)
170 */ 170 */
171 #define EXT2_SECRM_FL FS_SEC 171 #define EXT2_SECRM_FL FS_SECRM_FL /* Secure deletion */
172 #define EXT2_UNRM_FL FS_UNR 172 #define EXT2_UNRM_FL FS_UNRM_FL /* Undelete */
173 #define EXT2_COMPR_FL FS_COM 173 #define EXT2_COMPR_FL FS_COMPR_FL /* Compress file */
174 #define EXT2_SYNC_FL FS_SYN 174 #define EXT2_SYNC_FL FS_SYNC_FL /* Synchronous updates */
175 #define EXT2_IMMUTABLE_FL FS_IMM 175 #define EXT2_IMMUTABLE_FL FS_IMMUTABLE_FL /* Immutable file */
176 #define EXT2_APPEND_FL FS_APP 176 #define EXT2_APPEND_FL FS_APPEND_FL /* writes to file may only append */
177 #define EXT2_NODUMP_FL FS_NOD 177 #define EXT2_NODUMP_FL FS_NODUMP_FL /* do not dump file */
178 #define EXT2_NOATIME_FL FS_NOA 178 #define EXT2_NOATIME_FL FS_NOATIME_FL /* do not update atime */
179 /* Reserved for compression usage... */ 179 /* Reserved for compression usage... */
180 #define EXT2_DIRTY_FL FS_DIR 180 #define EXT2_DIRTY_FL FS_DIRTY_FL
181 #define EXT2_COMPRBLK_FL FS_COM 181 #define EXT2_COMPRBLK_FL FS_COMPRBLK_FL /* One or more compressed clusters */
182 #define EXT2_NOCOMP_FL FS_NOC 182 #define EXT2_NOCOMP_FL FS_NOCOMP_FL /* Don't compress */
183 #define EXT2_ECOMPR_FL FS_ECO 183 #define EXT2_ECOMPR_FL FS_ECOMPR_FL /* Compression error */
184 /* End compression flags --- maybe not all use 184 /* End compression flags --- maybe not all used */
185 #define EXT2_BTREE_FL FS_BTR 185 #define EXT2_BTREE_FL FS_BTREE_FL /* btree format dir */
186 #define EXT2_INDEX_FL FS_IND 186 #define EXT2_INDEX_FL FS_INDEX_FL /* hash-indexed directory */
187 #define EXT2_IMAGIC_FL FS_IMA 187 #define EXT2_IMAGIC_FL FS_IMAGIC_FL /* AFS directory */
188 #define EXT2_JOURNAL_DATA_FL FS_JOU 188 #define EXT2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL /* Reserved for ext3 */
189 #define EXT2_NOTAIL_FL FS_NOT 189 #define EXT2_NOTAIL_FL FS_NOTAIL_FL /* file tail should not be merged */
190 #define EXT2_DIRSYNC_FL FS_DIR 190 #define EXT2_DIRSYNC_FL FS_DIRSYNC_FL /* dirsync behaviour (directories only) */
191 #define EXT2_TOPDIR_FL FS_TOP 191 #define EXT2_TOPDIR_FL FS_TOPDIR_FL /* Top of directory hierarchies*/
192 #define EXT2_RESERVED_FL FS_RES 192 #define EXT2_RESERVED_FL FS_RESERVED_FL /* reserved for ext2 lib */
193 193
194 #define EXT2_FL_USER_VISIBLE FS_FL_ 194 #define EXT2_FL_USER_VISIBLE FS_FL_USER_VISIBLE /* User visible flags */
195 #define EXT2_FL_USER_MODIFIABLE FS_FL_ 195 #define EXT2_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE /* User modifiable flags */
196 196
>> 197 /* Flags that should be inherited by new inodes from their parent. */
>> 198 #define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\
>> 199 EXT2_SYNC_FL | EXT2_IMMUTABLE_FL | EXT2_APPEND_FL |\
>> 200 EXT2_NODUMP_FL | EXT2_NOATIME_FL | EXT2_COMPRBLK_FL|\
>> 201 EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\
>> 202 EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL)
>> 203
>> 204 /* Flags that are appropriate for regular files (all but dir-specific ones). */
>> 205 #define EXT2_REG_FLMASK (~(EXT2_DIRSYNC_FL | EXT2_TOPDIR_FL))
>> 206
>> 207 /* Flags that are appropriate for non-directories/regular files. */
>> 208 #define EXT2_OTHER_FLMASK (EXT2_NODUMP_FL | EXT2_NOATIME_FL)
>> 209
>> 210 /* Mask out flags that are inappropriate for the given type of inode. */
>> 211 static inline __u32 ext2_mask_flags(umode_t mode, __u32 flags)
>> 212 {
>> 213 if (S_ISDIR(mode))
>> 214 return flags;
>> 215 else if (S_ISREG(mode))
>> 216 return flags & EXT2_REG_FLMASK;
>> 217 else
>> 218 return flags & EXT2_OTHER_FLMASK;
>> 219 }
>> 220
197 /* 221 /*
198 * ioctl commands 222 * ioctl commands
199 */ 223 */
200 #define EXT2_IOC_GETFLAGS FS_IOC 224 #define EXT2_IOC_GETFLAGS FS_IOC_GETFLAGS
201 #define EXT2_IOC_SETFLAGS FS_IOC 225 #define EXT2_IOC_SETFLAGS FS_IOC_SETFLAGS
202 #define EXT2_IOC_GETVERSION FS_IOC 226 #define EXT2_IOC_GETVERSION FS_IOC_GETVERSION
203 #define EXT2_IOC_SETVERSION FS_IOC 227 #define EXT2_IOC_SETVERSION FS_IOC_SETVERSION
204 #define EXT2_IOC_GETRSVSZ _IOR(' 228 #define EXT2_IOC_GETRSVSZ _IOR('f', 5, long)
205 #define EXT2_IOC_SETRSVSZ _IOW(' 229 #define EXT2_IOC_SETRSVSZ _IOW('f', 6, long)
206 230
207 /* 231 /*
208 * ioctl commands in 32 bit emulation 232 * ioctl commands in 32 bit emulation
209 */ 233 */
210 #define EXT2_IOC32_GETFLAGS FS_IOC 234 #define EXT2_IOC32_GETFLAGS FS_IOC32_GETFLAGS
211 #define EXT2_IOC32_SETFLAGS FS_IOC 235 #define EXT2_IOC32_SETFLAGS FS_IOC32_SETFLAGS
212 #define EXT2_IOC32_GETVERSION FS_IOC 236 #define EXT2_IOC32_GETVERSION FS_IOC32_GETVERSION
213 #define EXT2_IOC32_SETVERSION FS_IOC 237 #define EXT2_IOC32_SETVERSION FS_IOC32_SETVERSION
214 238
215 /* 239 /*
216 * Structure of an inode on the disk 240 * Structure of an inode on the disk
217 */ 241 */
218 struct ext2_inode { 242 struct ext2_inode {
219 __le16 i_mode; /* File mode * 243 __le16 i_mode; /* File mode */
220 __le16 i_uid; /* Low 16 bits 244 __le16 i_uid; /* Low 16 bits of Owner Uid */
221 __le32 i_size; /* Size in byt 245 __le32 i_size; /* Size in bytes */
222 __le32 i_atime; /* Access time 246 __le32 i_atime; /* Access time */
223 __le32 i_ctime; /* Creation ti 247 __le32 i_ctime; /* Creation time */
224 __le32 i_mtime; /* Modificatio 248 __le32 i_mtime; /* Modification time */
225 __le32 i_dtime; /* Deletion Ti 249 __le32 i_dtime; /* Deletion Time */
226 __le16 i_gid; /* Low 16 bits 250 __le16 i_gid; /* Low 16 bits of Group Id */
227 __le16 i_links_count; /* Links count 251 __le16 i_links_count; /* Links count */
228 __le32 i_blocks; /* Blocks coun 252 __le32 i_blocks; /* Blocks count */
229 __le32 i_flags; /* File flags 253 __le32 i_flags; /* File flags */
230 union { 254 union {
231 struct { 255 struct {
232 __le32 l_i_reserved1; 256 __le32 l_i_reserved1;
233 } linux1; 257 } linux1;
234 struct { 258 struct {
235 __le32 h_i_translator 259 __le32 h_i_translator;
236 } hurd1; 260 } hurd1;
237 struct { 261 struct {
238 __le32 m_i_reserved1; 262 __le32 m_i_reserved1;
239 } masix1; 263 } masix1;
240 } osd1; /* OS 264 } osd1; /* OS dependent 1 */
241 __le32 i_block[EXT2_N_BLOCKS];/* Poin 265 __le32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
242 __le32 i_generation; /* File versio 266 __le32 i_generation; /* File version (for NFS) */
243 __le32 i_file_acl; /* File ACL */ 267 __le32 i_file_acl; /* File ACL */
244 __le32 i_dir_acl; /* Directory A 268 __le32 i_dir_acl; /* Directory ACL */
245 __le32 i_faddr; /* Fragment ad 269 __le32 i_faddr; /* Fragment address */
246 union { 270 union {
247 struct { 271 struct {
248 __u8 l_i_frag; 272 __u8 l_i_frag; /* Fragment number */
249 __u8 l_i_fsize; 273 __u8 l_i_fsize; /* Fragment size */
250 __u16 i_pad1; 274 __u16 i_pad1;
251 __le16 l_i_uid_high; 275 __le16 l_i_uid_high; /* these 2 fields */
252 __le16 l_i_gid_high; 276 __le16 l_i_gid_high; /* were reserved2[0] */
253 __u32 l_i_reserved2; 277 __u32 l_i_reserved2;
254 } linux2; 278 } linux2;
255 struct { 279 struct {
256 __u8 h_i_frag; 280 __u8 h_i_frag; /* Fragment number */
257 __u8 h_i_fsize; 281 __u8 h_i_fsize; /* Fragment size */
258 __le16 h_i_mode_high; 282 __le16 h_i_mode_high;
259 __le16 h_i_uid_high; 283 __le16 h_i_uid_high;
260 __le16 h_i_gid_high; 284 __le16 h_i_gid_high;
261 __le32 h_i_author; 285 __le32 h_i_author;
262 } hurd2; 286 } hurd2;
263 struct { 287 struct {
264 __u8 m_i_frag; 288 __u8 m_i_frag; /* Fragment number */
265 __u8 m_i_fsize; 289 __u8 m_i_fsize; /* Fragment size */
266 __u16 m_pad1; 290 __u16 m_pad1;
267 __u32 m_i_reserved2[ 291 __u32 m_i_reserved2[2];
268 } masix2; 292 } masix2;
269 } osd2; /* OS 293 } osd2; /* OS dependent 2 */
270 }; 294 };
271 295
272 #define i_size_high i_dir_acl 296 #define i_size_high i_dir_acl
273 297
274 #if defined(__KERNEL__) || defined(__linux__) 298 #if defined(__KERNEL__) || defined(__linux__)
275 #define i_reserved1 osd1.linux1.l_i_reserv 299 #define i_reserved1 osd1.linux1.l_i_reserved1
276 #define i_frag osd2.linux2.l_i_frag 300 #define i_frag osd2.linux2.l_i_frag
277 #define i_fsize osd2.linux2.l_i_fsize 301 #define i_fsize osd2.linux2.l_i_fsize
278 #define i_uid_low i_uid 302 #define i_uid_low i_uid
279 #define i_gid_low i_gid 303 #define i_gid_low i_gid
280 #define i_uid_high osd2.linux2.l_i_uid_hi 304 #define i_uid_high osd2.linux2.l_i_uid_high
281 #define i_gid_high osd2.linux2.l_i_gid_hi 305 #define i_gid_high osd2.linux2.l_i_gid_high
282 #define i_reserved2 osd2.linux2.l_i_reserv 306 #define i_reserved2 osd2.linux2.l_i_reserved2
283 #endif 307 #endif
284 308
285 #ifdef __hurd__ 309 #ifdef __hurd__
286 #define i_translator osd1.hurd1.h_i_transla 310 #define i_translator osd1.hurd1.h_i_translator
287 #define i_frag osd2.hurd2.h_i_frag; !! 311 #define i_frag osd2.hurd2.h_i_frag
288 #define i_fsize osd2.hurd2.h_i_fsize; !! 312 #define i_fsize osd2.hurd2.h_i_fsize
289 #define i_uid_high osd2.hurd2.h_i_uid_hig 313 #define i_uid_high osd2.hurd2.h_i_uid_high
290 #define i_gid_high osd2.hurd2.h_i_gid_hig 314 #define i_gid_high osd2.hurd2.h_i_gid_high
291 #define i_author osd2.hurd2.h_i_author 315 #define i_author osd2.hurd2.h_i_author
292 #endif 316 #endif
293 317
294 #ifdef __masix__ 318 #ifdef __masix__
295 #define i_reserved1 osd1.masix1.m_i_reserv 319 #define i_reserved1 osd1.masix1.m_i_reserved1
296 #define i_frag osd2.masix2.m_i_frag 320 #define i_frag osd2.masix2.m_i_frag
297 #define i_fsize osd2.masix2.m_i_fsize 321 #define i_fsize osd2.masix2.m_i_fsize
298 #define i_reserved2 osd2.masix2.m_i_reserv 322 #define i_reserved2 osd2.masix2.m_i_reserved2
299 #endif 323 #endif
300 324
301 /* 325 /*
302 * File system states 326 * File system states
303 */ 327 */
304 #define EXT2_VALID_FS 0x0001 328 #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
305 #define EXT2_ERROR_FS 0x0002 329 #define EXT2_ERROR_FS 0x0002 /* Errors detected */
306 330
307 /* 331 /*
308 * Mount flags 332 * Mount flags
309 */ 333 */
310 #define EXT2_MOUNT_CHECK 0x0000 334 #define EXT2_MOUNT_CHECK 0x000001 /* Do mount-time checks */
311 #define EXT2_MOUNT_OLDALLOC 0x0000 335 #define EXT2_MOUNT_OLDALLOC 0x000002 /* Don't use the new Orlov allocator */
312 #define EXT2_MOUNT_GRPID 0x0000 336 #define EXT2_MOUNT_GRPID 0x000004 /* Create files with directory's group */
313 #define EXT2_MOUNT_DEBUG 0x0000 337 #define EXT2_MOUNT_DEBUG 0x000008 /* Some debugging messages */
314 #define EXT2_MOUNT_ERRORS_CONT 0x0000 338 #define EXT2_MOUNT_ERRORS_CONT 0x000010 /* Continue on errors */
315 #define EXT2_MOUNT_ERRORS_RO 0x0000 339 #define EXT2_MOUNT_ERRORS_RO 0x000020 /* Remount fs ro on errors */
316 #define EXT2_MOUNT_ERRORS_PANIC 0x0000 340 #define EXT2_MOUNT_ERRORS_PANIC 0x000040 /* Panic on errors */
317 #define EXT2_MOUNT_MINIX_DF 0x0000 341 #define EXT2_MOUNT_MINIX_DF 0x000080 /* Mimics the Minix statfs */
318 #define EXT2_MOUNT_NOBH 0x0001 342 #define EXT2_MOUNT_NOBH 0x000100 /* No buffer_heads */
319 #define EXT2_MOUNT_NO_UID32 0x0002 343 #define EXT2_MOUNT_NO_UID32 0x000200 /* Disable 32-bit UIDs */
320 #define EXT2_MOUNT_XATTR_USER 0x0040 344 #define EXT2_MOUNT_XATTR_USER 0x004000 /* Extended user attributes */
321 #define EXT2_MOUNT_POSIX_ACL 0x0080 345 #define EXT2_MOUNT_POSIX_ACL 0x008000 /* POSIX Access Control Lists */
322 #define EXT2_MOUNT_XIP 0x0100 346 #define EXT2_MOUNT_XIP 0x010000 /* Execute in place */
323 #define EXT2_MOUNT_USRQUOTA 0x0200 347 #define EXT2_MOUNT_USRQUOTA 0x020000 /* user quota */
324 #define EXT2_MOUNT_GRPQUOTA 0x0400 348 #define EXT2_MOUNT_GRPQUOTA 0x040000 /* group quota */
325 #define EXT2_MOUNT_RESERVATION 0x0800 349 #define EXT2_MOUNT_RESERVATION 0x080000 /* Preallocation */
326 350
327 351
328 #define clear_opt(o, opt) o &= ~ 352 #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
329 #define set_opt(o, opt) o |= E 353 #define set_opt(o, opt) o |= EXT2_MOUNT_##opt
330 #define test_opt(sb, opt) (EXT2_ 354 #define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \
331 EXT2_ 355 EXT2_MOUNT_##opt)
332 /* 356 /*
333 * Maximal mount counts between two filesystem 357 * Maximal mount counts between two filesystem checks
334 */ 358 */
335 #define EXT2_DFL_MAX_MNT_COUNT 20 359 #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
336 #define EXT2_DFL_CHECKINTERVAL 0 360 #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
337 361
338 /* 362 /*
339 * Behaviour when detecting errors 363 * Behaviour when detecting errors
340 */ 364 */
341 #define EXT2_ERRORS_CONTINUE 1 365 #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
342 #define EXT2_ERRORS_RO 2 366 #define EXT2_ERRORS_RO 2 /* Remount fs read-only */
343 #define EXT2_ERRORS_PANIC 3 367 #define EXT2_ERRORS_PANIC 3 /* Panic */
344 #define EXT2_ERRORS_DEFAULT EXT2_E 368 #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
345 369
346 /* 370 /*
347 * Structure of the super block 371 * Structure of the super block
348 */ 372 */
349 struct ext2_super_block { 373 struct ext2_super_block {
350 __le32 s_inodes_count; /* Ino 374 __le32 s_inodes_count; /* Inodes count */
351 __le32 s_blocks_count; /* Blo 375 __le32 s_blocks_count; /* Blocks count */
352 __le32 s_r_blocks_count; /* Res 376 __le32 s_r_blocks_count; /* Reserved blocks count */
353 __le32 s_free_blocks_count; /* Fre 377 __le32 s_free_blocks_count; /* Free blocks count */
354 __le32 s_free_inodes_count; /* Fre 378 __le32 s_free_inodes_count; /* Free inodes count */
355 __le32 s_first_data_block; /* Fir 379 __le32 s_first_data_block; /* First Data Block */
356 __le32 s_log_block_size; /* Blo 380 __le32 s_log_block_size; /* Block size */
357 __le32 s_log_frag_size; /* Fra 381 __le32 s_log_frag_size; /* Fragment size */
358 __le32 s_blocks_per_group; /* # B 382 __le32 s_blocks_per_group; /* # Blocks per group */
359 __le32 s_frags_per_group; /* # F 383 __le32 s_frags_per_group; /* # Fragments per group */
360 __le32 s_inodes_per_group; /* # I 384 __le32 s_inodes_per_group; /* # Inodes per group */
361 __le32 s_mtime; /* Mou 385 __le32 s_mtime; /* Mount time */
362 __le32 s_wtime; /* Wri 386 __le32 s_wtime; /* Write time */
363 __le16 s_mnt_count; /* Mou 387 __le16 s_mnt_count; /* Mount count */
364 __le16 s_max_mnt_count; /* Max 388 __le16 s_max_mnt_count; /* Maximal mount count */
365 __le16 s_magic; /* Mag 389 __le16 s_magic; /* Magic signature */
366 __le16 s_state; /* Fil 390 __le16 s_state; /* File system state */
367 __le16 s_errors; /* Beh 391 __le16 s_errors; /* Behaviour when detecting errors */
368 __le16 s_minor_rev_level; /* min 392 __le16 s_minor_rev_level; /* minor revision level */
369 __le32 s_lastcheck; /* tim 393 __le32 s_lastcheck; /* time of last check */
370 __le32 s_checkinterval; /* max 394 __le32 s_checkinterval; /* max. time between checks */
371 __le32 s_creator_os; /* OS 395 __le32 s_creator_os; /* OS */
372 __le32 s_rev_level; /* Rev 396 __le32 s_rev_level; /* Revision level */
373 __le16 s_def_resuid; /* Def 397 __le16 s_def_resuid; /* Default uid for reserved blocks */
374 __le16 s_def_resgid; /* Def 398 __le16 s_def_resgid; /* Default gid for reserved blocks */
375 /* 399 /*
376 * These fields are for EXT2_DYNAMIC_R 400 * These fields are for EXT2_DYNAMIC_REV superblocks only.
377 * 401 *
378 * Note: the difference between the co 402 * Note: the difference between the compatible feature set and
379 * the incompatible feature set is tha 403 * the incompatible feature set is that if there is a bit set
380 * in the incompatible feature set tha 404 * in the incompatible feature set that the kernel doesn't
381 * know about, it should refuse to mou 405 * know about, it should refuse to mount the filesystem.
382 * 406 *
383 * e2fsck's requirements are more stri 407 * e2fsck's requirements are more strict; if it doesn't know
384 * about a feature in either the compa 408 * about a feature in either the compatible or incompatible
385 * feature set, it must abort and not 409 * feature set, it must abort and not try to meddle with
386 * things it doesn't understand... 410 * things it doesn't understand...
387 */ 411 */
388 __le32 s_first_ino; /* Fir 412 __le32 s_first_ino; /* First non-reserved inode */
389 __le16 s_inode_size; /* siz 413 __le16 s_inode_size; /* size of inode structure */
390 __le16 s_block_group_nr; /* blo 414 __le16 s_block_group_nr; /* block group # of this superblock */
391 __le32 s_feature_compat; /* com 415 __le32 s_feature_compat; /* compatible feature set */
392 __le32 s_feature_incompat; /* inc 416 __le32 s_feature_incompat; /* incompatible feature set */
393 __le32 s_feature_ro_compat; /* rea 417 __le32 s_feature_ro_compat; /* readonly-compatible feature set */
394 __u8 s_uuid[16]; /* 128 418 __u8 s_uuid[16]; /* 128-bit uuid for volume */
395 char s_volume_name[16]; /* vol 419 char s_volume_name[16]; /* volume name */
396 char s_last_mounted[64]; /* dir 420 char s_last_mounted[64]; /* directory where last mounted */
397 __le32 s_algorithm_usage_bitmap; /* F 421 __le32 s_algorithm_usage_bitmap; /* For compression */
398 /* 422 /*
399 * Performance hints. Directory preal 423 * Performance hints. Directory preallocation should only
400 * happen if the EXT2_COMPAT_PREALLOC 424 * happen if the EXT2_COMPAT_PREALLOC flag is on.
401 */ 425 */
402 __u8 s_prealloc_blocks; /* Nr 426 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
403 __u8 s_prealloc_dir_blocks; /* Nr 427 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
404 __u16 s_padding1; 428 __u16 s_padding1;
405 /* 429 /*
406 * Journaling support valid if EXT3_FE 430 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
407 */ 431 */
408 __u8 s_journal_uuid[16]; /* uui 432 __u8 s_journal_uuid[16]; /* uuid of journal superblock */
409 __u32 s_journal_inum; /* ino 433 __u32 s_journal_inum; /* inode number of journal file */
410 __u32 s_journal_dev; /* dev 434 __u32 s_journal_dev; /* device number of journal file */
411 __u32 s_last_orphan; /* sta 435 __u32 s_last_orphan; /* start of list of inodes to delete */
412 __u32 s_hash_seed[4]; /* HTR 436 __u32 s_hash_seed[4]; /* HTREE hash seed */
413 __u8 s_def_hash_version; /* Def 437 __u8 s_def_hash_version; /* Default hash version to use */
414 __u8 s_reserved_char_pad; 438 __u8 s_reserved_char_pad;
415 __u16 s_reserved_word_pad; 439 __u16 s_reserved_word_pad;
416 __le32 s_default_mount_opts; 440 __le32 s_default_mount_opts;
417 __le32 s_first_meta_bg; /* Fir 441 __le32 s_first_meta_bg; /* First metablock block group */
418 __u32 s_reserved[190]; /* Pad 442 __u32 s_reserved[190]; /* Padding to the end of the block */
419 }; 443 };
420 444
421 /* 445 /*
422 * Codes for operating systems 446 * Codes for operating systems
423 */ 447 */
424 #define EXT2_OS_LINUX 0 448 #define EXT2_OS_LINUX 0
425 #define EXT2_OS_HURD 1 449 #define EXT2_OS_HURD 1
426 #define EXT2_OS_MASIX 2 450 #define EXT2_OS_MASIX 2
427 #define EXT2_OS_FREEBSD 3 451 #define EXT2_OS_FREEBSD 3
428 #define EXT2_OS_LITES 4 452 #define EXT2_OS_LITES 4
429 453
430 /* 454 /*
431 * Revision levels 455 * Revision levels
432 */ 456 */
433 #define EXT2_GOOD_OLD_REV 0 /* The 457 #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
434 #define EXT2_DYNAMIC_REV 1 /* V2 458 #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
435 459
436 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_ 460 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
437 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_R 461 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
438 462
439 #define EXT2_GOOD_OLD_INODE_SIZE 128 463 #define EXT2_GOOD_OLD_INODE_SIZE 128
440 464
441 /* 465 /*
442 * Feature set definitions 466 * Feature set definitions
443 */ 467 */
444 468
445 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) 469 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
446 ( EXT2_SB(sb)->s_es->s_feature_compat 470 ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
447 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) 471 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
448 ( EXT2_SB(sb)->s_es->s_feature_ro_comp 472 ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
449 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) 473 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
450 ( EXT2_SB(sb)->s_es->s_feature_incompa 474 ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
451 #define EXT2_SET_COMPAT_FEATURE(sb,mask) 475 #define EXT2_SET_COMPAT_FEATURE(sb,mask) \
452 EXT2_SB(sb)->s_es->s_feature_compat |= 476 EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
453 #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) 477 #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
454 EXT2_SB(sb)->s_es->s_feature_ro_compat 478 EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
455 #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) 479 #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
456 EXT2_SB(sb)->s_es->s_feature_incompat 480 EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
457 #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) 481 #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
458 EXT2_SB(sb)->s_es->s_feature_compat &= 482 EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
459 #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) 483 #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
460 EXT2_SB(sb)->s_es->s_feature_ro_compat 484 EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
461 #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) 485 #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
462 EXT2_SB(sb)->s_es->s_feature_incompat 486 EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
463 487
464 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 488 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
465 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 489 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
466 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 490 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
467 #define EXT2_FEATURE_COMPAT_EXT_ATTR 491 #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
468 #define EXT2_FEATURE_COMPAT_RESIZE_INO 492 #define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
469 #define EXT2_FEATURE_COMPAT_DIR_INDEX 493 #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
470 #define EXT2_FEATURE_COMPAT_ANY 494 #define EXT2_FEATURE_COMPAT_ANY 0xffffffff
471 495
472 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 496 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
473 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 497 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
474 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 498 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
475 #define EXT2_FEATURE_RO_COMPAT_ANY 499 #define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
476 500
477 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 501 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
478 #define EXT2_FEATURE_INCOMPAT_FILETYPE 502 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
479 #define EXT3_FEATURE_INCOMPAT_RECOVER 503 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
480 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 504 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
481 #define EXT2_FEATURE_INCOMPAT_META_BG 505 #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
482 #define EXT2_FEATURE_INCOMPAT_ANY 506 #define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff
483 507
484 #define EXT2_FEATURE_COMPAT_SUPP EXT2_F 508 #define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
485 #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_ 509 #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
486 EXT2_ 510 EXT2_FEATURE_INCOMPAT_META_BG)
487 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_ 511 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
488 EXT2_ 512 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
489 EXT2_ 513 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
490 #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED 514 #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
491 #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED 515 #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
492 516
493 /* 517 /*
494 * Default values for user and/or group using 518 * Default values for user and/or group using reserved blocks
495 */ 519 */
496 #define EXT2_DEF_RESUID 0 520 #define EXT2_DEF_RESUID 0
497 #define EXT2_DEF_RESGID 0 521 #define EXT2_DEF_RESGID 0
498 522
499 /* 523 /*
500 * Default mount options 524 * Default mount options
501 */ 525 */
502 #define EXT2_DEFM_DEBUG 0x0001 526 #define EXT2_DEFM_DEBUG 0x0001
503 #define EXT2_DEFM_BSDGROUPS 0x0002 527 #define EXT2_DEFM_BSDGROUPS 0x0002
504 #define EXT2_DEFM_XATTR_USER 0x0004 528 #define EXT2_DEFM_XATTR_USER 0x0004
505 #define EXT2_DEFM_ACL 0x0008 529 #define EXT2_DEFM_ACL 0x0008
506 #define EXT2_DEFM_UID16 0x0010 530 #define EXT2_DEFM_UID16 0x0010
507 /* Not used by ext2, but reserved for use 531 /* Not used by ext2, but reserved for use by ext3 */
508 #define EXT3_DEFM_JMODE 0x0060 532 #define EXT3_DEFM_JMODE 0x0060
509 #define EXT3_DEFM_JMODE_DATA 0x0020 533 #define EXT3_DEFM_JMODE_DATA 0x0020
510 #define EXT3_DEFM_JMODE_ORDERED 0x0040 534 #define EXT3_DEFM_JMODE_ORDERED 0x0040
511 #define EXT3_DEFM_JMODE_WBACK 0x0060 535 #define EXT3_DEFM_JMODE_WBACK 0x0060
512 536
513 /* 537 /*
514 * Structure of a directory entry 538 * Structure of a directory entry
515 */ 539 */
516 #define EXT2_NAME_LEN 255 540 #define EXT2_NAME_LEN 255
517 541
518 struct ext2_dir_entry { 542 struct ext2_dir_entry {
519 __le32 inode; /* Ino 543 __le32 inode; /* Inode number */
520 __le16 rec_len; /* Dir 544 __le16 rec_len; /* Directory entry length */
521 __le16 name_len; /* Nam 545 __le16 name_len; /* Name length */
522 char name[EXT2_NAME_LEN]; /* Fil 546 char name[EXT2_NAME_LEN]; /* File name */
523 }; 547 };
524 548
525 /* 549 /*
526 * The new version of the directory entry. Si 550 * The new version of the directory entry. Since EXT2 structures are
527 * stored in intel byte order, and the name_le 551 * stored in intel byte order, and the name_len field could never be
528 * bigger than 255 chars, it's safe to reclaim 552 * bigger than 255 chars, it's safe to reclaim the extra byte for the
529 * file_type field. 553 * file_type field.
530 */ 554 */
531 struct ext2_dir_entry_2 { 555 struct ext2_dir_entry_2 {
532 __le32 inode; /* Ino 556 __le32 inode; /* Inode number */
533 __le16 rec_len; /* Dir 557 __le16 rec_len; /* Directory entry length */
534 __u8 name_len; /* Nam 558 __u8 name_len; /* Name length */
535 __u8 file_type; 559 __u8 file_type;
536 char name[EXT2_NAME_LEN]; /* Fil 560 char name[EXT2_NAME_LEN]; /* File name */
537 }; 561 };
538 562
539 /* 563 /*
540 * Ext2 directory file types. Only the low 3 564 * Ext2 directory file types. Only the low 3 bits are used. The
541 * other bits are reserved for now. 565 * other bits are reserved for now.
542 */ 566 */
543 enum { 567 enum {
544 EXT2_FT_UNKNOWN, 568 EXT2_FT_UNKNOWN,
545 EXT2_FT_REG_FILE, 569 EXT2_FT_REG_FILE,
546 EXT2_FT_DIR, 570 EXT2_FT_DIR,
547 EXT2_FT_CHRDEV, 571 EXT2_FT_CHRDEV,
548 EXT2_FT_BLKDEV, 572 EXT2_FT_BLKDEV,
549 EXT2_FT_FIFO, 573 EXT2_FT_FIFO,
550 EXT2_FT_SOCK, 574 EXT2_FT_SOCK,
551 EXT2_FT_SYMLINK, 575 EXT2_FT_SYMLINK,
552 EXT2_FT_MAX 576 EXT2_FT_MAX
553 }; 577 };
554 578
555 /* 579 /*
556 * EXT2_DIR_PAD defines the directory entries 580 * EXT2_DIR_PAD defines the directory entries boundaries
557 * 581 *
558 * NOTE: It must be a multiple of 4 582 * NOTE: It must be a multiple of 4
559 */ 583 */
560 #define EXT2_DIR_PAD 4 584 #define EXT2_DIR_PAD 4
561 #define EXT2_DIR_ROUND (EXT2_ 585 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
562 #define EXT2_DIR_REC_LEN(name_len) (((nam 586 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
563 ~EXT2 587 ~EXT2_DIR_ROUND)
564 #define EXT2_MAX_REC_LEN ((1<<1 588 #define EXT2_MAX_REC_LEN ((1<<16)-1)
565 589
566 #endif /* _LINUX_EXT2_FS_H */ 590 #endif /* _LINUX_EXT2_FS_H */
567 591
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