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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/ext2_fs_sb.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_PREALLOCATE to preallocate data blocks for expanding files
33 */ 33 */
34 #define EXT2_DEFAULT_RESERVE_BLOCKS 8 !! 34 #define EXT2_PREALLOCATE
35 /*max window size: 1024(direct blocks) + 3([t, !! 35 #define EXT2_DEFAULT_PREALLOC_BLOCKS 8
36 #define EXT2_MAX_RESERVE_BLOCKS 1027 !! 36
37 #define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0 <<
38 /* 37 /*
39 * The second extended file system version 38 * The second extended file system version
40 */ 39 */
41 #define EXT2FS_DATE "95/08/09" 40 #define EXT2FS_DATE "95/08/09"
42 #define EXT2FS_VERSION "0.5b" 41 #define EXT2FS_VERSION "0.5b"
43 42
44 /* 43 /*
45 * Debug code 44 * Debug code
46 */ 45 */
47 #ifdef EXT2FS_DEBUG 46 #ifdef EXT2FS_DEBUG
48 # define ext2_debug(f, a...) { \ 47 # define ext2_debug(f, a...) { \
49 printk 48 printk ("EXT2-fs DEBUG (%s, %d): %s:", \
50 49 __FILE__, __LINE__, __FUNCTION__); \
51 printk 50 printk (f, ## a); \
52 } 51 }
53 #else 52 #else
54 # define ext2_debug(f, a...) /**/ 53 # define ext2_debug(f, a...) /**/
55 #endif 54 #endif
56 55
57 /* 56 /*
58 * Special inode numbers 57 * Special inode numbers
59 */ 58 */
60 #define EXT2_BAD_INO 1 /* Bad 59 #define EXT2_BAD_INO 1 /* Bad blocks inode */
61 #define EXT2_ROOT_INO 2 /* Roo 60 #define EXT2_ROOT_INO 2 /* Root inode */
62 #define EXT2_BOOT_LOADER_INO 5 /* Boo 61 #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
63 #define EXT2_UNDEL_DIR_INO 6 /* Und 62 #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
64 63
65 /* First non-reserved inode for old ext2 files 64 /* First non-reserved inode for old ext2 filesystems */
66 #define EXT2_GOOD_OLD_FIRST_INO 11 65 #define EXT2_GOOD_OLD_FIRST_INO 11
67 66
>> 67 /*
>> 68 * The second extended file system magic number
>> 69 */
>> 70 #define EXT2_SUPER_MAGIC 0xEF53
>> 71
68 #ifdef __KERNEL__ 72 #ifdef __KERNEL__
69 #include <linux/ext2_fs_sb.h> <<
70 static inline struct ext2_sb_info *EXT2_SB(str 73 static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
71 { 74 {
72 return sb->s_fs_info; 75 return sb->s_fs_info;
73 } 76 }
74 #else 77 #else
75 /* Assume that user mode programs are passing 78 /* Assume that user mode programs are passing in an ext2fs superblock, not
76 * a kernel struct super_block. This will all 79 * a kernel struct super_block. This will allow us to call the feature-test
77 * macros from user land. */ 80 * macros from user land. */
78 #define EXT2_SB(sb) (sb) 81 #define EXT2_SB(sb) (sb)
79 #endif 82 #endif
80 83
81 /* 84 /*
82 * Maximal count of links to a file 85 * Maximal count of links to a file
83 */ 86 */
84 #define EXT2_LINK_MAX 32000 87 #define EXT2_LINK_MAX 32000
85 88
86 /* 89 /*
87 * Macro-instructions used to manage several b 90 * Macro-instructions used to manage several block sizes
88 */ 91 */
89 #define EXT2_MIN_BLOCK_SIZE 1024 92 #define EXT2_MIN_BLOCK_SIZE 1024
90 #define EXT2_MAX_BLOCK_SIZE 4096 93 #define EXT2_MAX_BLOCK_SIZE 4096
91 #define EXT2_MIN_BLOCK_LOG_SIZE 10 94 #define EXT2_MIN_BLOCK_LOG_SIZE 10
92 #ifdef __KERNEL__ 95 #ifdef __KERNEL__
93 # define EXT2_BLOCK_SIZE(s) ((s)-> 96 # define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
94 #else 97 #else
95 # define EXT2_BLOCK_SIZE(s) (EXT2_ 98 # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
96 #endif 99 #endif
97 #define EXT2_ADDR_PER_BLOCK(s) (EXT2_ 100 #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
98 #ifdef __KERNEL__ 101 #ifdef __KERNEL__
99 # define EXT2_BLOCK_SIZE_BITS(s) ((s)-> 102 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
100 #else 103 #else
101 # define EXT2_BLOCK_SIZE_BITS(s) ((s)-> 104 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
102 #endif 105 #endif
103 #ifdef __KERNEL__ 106 #ifdef __KERNEL__
104 #define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_ 107 #define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
105 #define EXT2_INODE_SIZE(s) (EXT2_ 108 #define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size)
106 #define EXT2_FIRST_INO(s) (EXT2_ 109 #define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino)
107 #else 110 #else
108 #define EXT2_INODE_SIZE(s) (((s)->s_rev_l 111 #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
109 EXT2_GOOD_OLD 112 EXT2_GOOD_OLD_INODE_SIZE : \
110 (s)->s_inode_ 113 (s)->s_inode_size)
111 #define EXT2_FIRST_INO(s) (((s)->s_rev_l 114 #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
112 EXT2_GOOD_OLD 115 EXT2_GOOD_OLD_FIRST_INO : \
113 (s)->s_first_ 116 (s)->s_first_ino)
114 #endif 117 #endif
115 118
116 /* 119 /*
117 * Macro-instructions used to manage fragments 120 * Macro-instructions used to manage fragments
118 */ 121 */
119 #define EXT2_MIN_FRAG_SIZE 1024 122 #define EXT2_MIN_FRAG_SIZE 1024
120 #define EXT2_MAX_FRAG_SIZE 4096 123 #define EXT2_MAX_FRAG_SIZE 4096
121 #define EXT2_MIN_FRAG_LOG_SIZE 10 124 #define EXT2_MIN_FRAG_LOG_SIZE 10
122 #ifdef __KERNEL__ 125 #ifdef __KERNEL__
123 # define EXT2_FRAG_SIZE(s) (EXT2_ 126 # define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size)
124 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_ 127 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block)
125 #else 128 #else
126 # define EXT2_FRAG_SIZE(s) (EXT2_ 129 # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
127 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_ 130 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
128 #endif 131 #endif
129 132
130 /* 133 /*
131 * Structure of a blocks group descriptor 134 * Structure of a blocks group descriptor
132 */ 135 */
133 struct ext2_group_desc 136 struct ext2_group_desc
134 { 137 {
135 __le32 bg_block_bitmap; 138 __le32 bg_block_bitmap; /* Blocks bitmap block */
136 __le32 bg_inode_bitmap; 139 __le32 bg_inode_bitmap; /* Inodes bitmap block */
137 __le32 bg_inode_table; /* Ino 140 __le32 bg_inode_table; /* Inodes table block */
138 __le16 bg_free_blocks_count; /* Fre 141 __le16 bg_free_blocks_count; /* Free blocks count */
139 __le16 bg_free_inodes_count; /* Fre 142 __le16 bg_free_inodes_count; /* Free inodes count */
140 __le16 bg_used_dirs_count; /* Dir 143 __le16 bg_used_dirs_count; /* Directories count */
141 __le16 bg_pad; 144 __le16 bg_pad;
142 __le32 bg_reserved[3]; 145 __le32 bg_reserved[3];
143 }; 146 };
144 147
145 /* 148 /*
146 * Macro-instructions used to manage group des 149 * Macro-instructions used to manage group descriptors
147 */ 150 */
148 #ifdef __KERNEL__ 151 #ifdef __KERNEL__
149 # define EXT2_BLOCKS_PER_GROUP(s) (EXT2_ 152 # define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
150 # define EXT2_DESC_PER_BLOCK(s) (EXT2_ 153 # define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block)
151 # define EXT2_INODES_PER_GROUP(s) (EXT2_ 154 # define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
152 # define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_ 155 # define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
153 #else 156 #else
154 # define EXT2_BLOCKS_PER_GROUP(s) ((s)-> 157 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
155 # define EXT2_DESC_PER_BLOCK(s) (EXT2_ 158 # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
156 # define EXT2_INODES_PER_GROUP(s) ((s)-> 159 # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
157 #endif 160 #endif
158 161
159 /* 162 /*
160 * Constants relative to the data blocks 163 * Constants relative to the data blocks
161 */ 164 */
162 #define EXT2_NDIR_BLOCKS 12 165 #define EXT2_NDIR_BLOCKS 12
163 #define EXT2_IND_BLOCK EXT2_N 166 #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
164 #define EXT2_DIND_BLOCK (EXT2_ 167 #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
165 #define EXT2_TIND_BLOCK (EXT2_ 168 #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
166 #define EXT2_N_BLOCKS (EXT2_ 169 #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
167 170
168 /* 171 /*
169 * Inode flags (GETFLAGS/SETFLAGS) !! 172 * Inode flags
170 */ 173 */
171 #define EXT2_SECRM_FL FS_SEC !! 174 #define EXT2_SECRM_FL 0x00000001 /* Secure deletion */
172 #define EXT2_UNRM_FL FS_UNR !! 175 #define EXT2_UNRM_FL 0x00000002 /* Undelete */
173 #define EXT2_COMPR_FL FS_COM !! 176 #define EXT2_COMPR_FL 0x00000004 /* Compress file */
174 #define EXT2_SYNC_FL FS_SYN !! 177 #define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */
175 #define EXT2_IMMUTABLE_FL FS_IMM !! 178 #define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */
176 #define EXT2_APPEND_FL FS_APP !! 179 #define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */
177 #define EXT2_NODUMP_FL FS_NOD !! 180 #define EXT2_NODUMP_FL 0x00000040 /* do not dump file */
178 #define EXT2_NOATIME_FL FS_NOA !! 181 #define EXT2_NOATIME_FL 0x00000080 /* do not update atime */
179 /* Reserved for compression usage... */ 182 /* Reserved for compression usage... */
180 #define EXT2_DIRTY_FL FS_DIR !! 183 #define EXT2_DIRTY_FL 0x00000100
181 #define EXT2_COMPRBLK_FL FS_COM !! 184 #define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
182 #define EXT2_NOCOMP_FL FS_NOC !! 185 #define EXT2_NOCOMP_FL 0x00000400 /* Don't compress */
183 #define EXT2_ECOMPR_FL FS_ECO !! 186 #define EXT2_ECOMPR_FL 0x00000800 /* Compression error */
184 /* End compression flags --- maybe not all use 187 /* End compression flags --- maybe not all used */
185 #define EXT2_BTREE_FL FS_BTR !! 188 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */
186 #define EXT2_INDEX_FL FS_IND !! 189 #define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */
187 #define EXT2_IMAGIC_FL FS_IMA !! 190 #define EXT2_IMAGIC_FL 0x00002000 /* AFS directory */
188 #define EXT2_JOURNAL_DATA_FL FS_JOU !! 191 #define EXT2_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
189 #define EXT2_NOTAIL_FL FS_NOT !! 192 #define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */
190 #define EXT2_DIRSYNC_FL FS_DIR !! 193 #define EXT2_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
191 #define EXT2_TOPDIR_FL FS_TOP !! 194 #define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
192 #define EXT2_RESERVED_FL FS_RES !! 195 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
193 196
194 #define EXT2_FL_USER_VISIBLE FS_FL_ !! 197 #define EXT2_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
195 #define EXT2_FL_USER_MODIFIABLE FS_FL_ !! 198 #define EXT2_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
196 199
197 /* 200 /*
198 * ioctl commands 201 * ioctl commands
199 */ 202 */
200 #define EXT2_IOC_GETFLAGS FS_IOC !! 203 #define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
201 #define EXT2_IOC_SETFLAGS FS_IOC !! 204 #define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
202 #define EXT2_IOC_GETVERSION FS_IOC !! 205 #define EXT2_IOC_GETVERSION _IOR('v', 1, long)
203 #define EXT2_IOC_SETVERSION FS_IOC !! 206 #define EXT2_IOC_SETVERSION _IOW('v', 2, long)
204 #define EXT2_IOC_GETRSVSZ _IOR(' <<
205 #define EXT2_IOC_SETRSVSZ _IOW(' <<
206 <<
207 /* <<
208 * ioctl commands in 32 bit emulation <<
209 */ <<
210 #define EXT2_IOC32_GETFLAGS FS_IOC <<
211 #define EXT2_IOC32_SETFLAGS FS_IOC <<
212 #define EXT2_IOC32_GETVERSION FS_IOC <<
213 #define EXT2_IOC32_SETVERSION FS_IOC <<
214 207
215 /* 208 /*
216 * Structure of an inode on the disk 209 * Structure of an inode on the disk
217 */ 210 */
218 struct ext2_inode { 211 struct ext2_inode {
219 __le16 i_mode; /* File mode * 212 __le16 i_mode; /* File mode */
220 __le16 i_uid; /* Low 16 bits 213 __le16 i_uid; /* Low 16 bits of Owner Uid */
221 __le32 i_size; /* Size in byt 214 __le32 i_size; /* Size in bytes */
222 __le32 i_atime; /* Access time 215 __le32 i_atime; /* Access time */
223 __le32 i_ctime; /* Creation ti 216 __le32 i_ctime; /* Creation time */
224 __le32 i_mtime; /* Modificatio 217 __le32 i_mtime; /* Modification time */
225 __le32 i_dtime; /* Deletion Ti 218 __le32 i_dtime; /* Deletion Time */
226 __le16 i_gid; /* Low 16 bits 219 __le16 i_gid; /* Low 16 bits of Group Id */
227 __le16 i_links_count; /* Links count 220 __le16 i_links_count; /* Links count */
228 __le32 i_blocks; /* Blocks coun 221 __le32 i_blocks; /* Blocks count */
229 __le32 i_flags; /* File flags 222 __le32 i_flags; /* File flags */
230 union { 223 union {
231 struct { 224 struct {
232 __le32 l_i_reserved1; 225 __le32 l_i_reserved1;
233 } linux1; 226 } linux1;
234 struct { 227 struct {
235 __le32 h_i_translator 228 __le32 h_i_translator;
236 } hurd1; 229 } hurd1;
237 struct { 230 struct {
238 __le32 m_i_reserved1; 231 __le32 m_i_reserved1;
239 } masix1; 232 } masix1;
240 } osd1; /* OS 233 } osd1; /* OS dependent 1 */
241 __le32 i_block[EXT2_N_BLOCKS];/* Poin 234 __le32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
242 __le32 i_generation; /* File versio 235 __le32 i_generation; /* File version (for NFS) */
243 __le32 i_file_acl; /* File ACL */ 236 __le32 i_file_acl; /* File ACL */
244 __le32 i_dir_acl; /* Directory A 237 __le32 i_dir_acl; /* Directory ACL */
245 __le32 i_faddr; /* Fragment ad 238 __le32 i_faddr; /* Fragment address */
246 union { 239 union {
247 struct { 240 struct {
248 __u8 l_i_frag; 241 __u8 l_i_frag; /* Fragment number */
249 __u8 l_i_fsize; 242 __u8 l_i_fsize; /* Fragment size */
250 __u16 i_pad1; 243 __u16 i_pad1;
251 __le16 l_i_uid_high; 244 __le16 l_i_uid_high; /* these 2 fields */
252 __le16 l_i_gid_high; 245 __le16 l_i_gid_high; /* were reserved2[0] */
253 __u32 l_i_reserved2; 246 __u32 l_i_reserved2;
254 } linux2; 247 } linux2;
255 struct { 248 struct {
256 __u8 h_i_frag; 249 __u8 h_i_frag; /* Fragment number */
257 __u8 h_i_fsize; 250 __u8 h_i_fsize; /* Fragment size */
258 __le16 h_i_mode_high; 251 __le16 h_i_mode_high;
259 __le16 h_i_uid_high; 252 __le16 h_i_uid_high;
260 __le16 h_i_gid_high; 253 __le16 h_i_gid_high;
261 __le32 h_i_author; 254 __le32 h_i_author;
262 } hurd2; 255 } hurd2;
263 struct { 256 struct {
264 __u8 m_i_frag; 257 __u8 m_i_frag; /* Fragment number */
265 __u8 m_i_fsize; 258 __u8 m_i_fsize; /* Fragment size */
266 __u16 m_pad1; 259 __u16 m_pad1;
267 __u32 m_i_reserved2[ 260 __u32 m_i_reserved2[2];
268 } masix2; 261 } masix2;
269 } osd2; /* OS 262 } osd2; /* OS dependent 2 */
270 }; 263 };
271 264
272 #define i_size_high i_dir_acl 265 #define i_size_high i_dir_acl
273 266
274 #if defined(__KERNEL__) || defined(__linux__) 267 #if defined(__KERNEL__) || defined(__linux__)
275 #define i_reserved1 osd1.linux1.l_i_reserv 268 #define i_reserved1 osd1.linux1.l_i_reserved1
276 #define i_frag osd2.linux2.l_i_frag 269 #define i_frag osd2.linux2.l_i_frag
277 #define i_fsize osd2.linux2.l_i_fsize 270 #define i_fsize osd2.linux2.l_i_fsize
278 #define i_uid_low i_uid 271 #define i_uid_low i_uid
279 #define i_gid_low i_gid 272 #define i_gid_low i_gid
280 #define i_uid_high osd2.linux2.l_i_uid_hi 273 #define i_uid_high osd2.linux2.l_i_uid_high
281 #define i_gid_high osd2.linux2.l_i_gid_hi 274 #define i_gid_high osd2.linux2.l_i_gid_high
282 #define i_reserved2 osd2.linux2.l_i_reserv 275 #define i_reserved2 osd2.linux2.l_i_reserved2
283 #endif 276 #endif
284 277
285 #ifdef __hurd__ 278 #ifdef __hurd__
286 #define i_translator osd1.hurd1.h_i_transla 279 #define i_translator osd1.hurd1.h_i_translator
287 #define i_frag osd2.hurd2.h_i_frag; 280 #define i_frag osd2.hurd2.h_i_frag;
288 #define i_fsize osd2.hurd2.h_i_fsize; 281 #define i_fsize osd2.hurd2.h_i_fsize;
289 #define i_uid_high osd2.hurd2.h_i_uid_hig 282 #define i_uid_high osd2.hurd2.h_i_uid_high
290 #define i_gid_high osd2.hurd2.h_i_gid_hig 283 #define i_gid_high osd2.hurd2.h_i_gid_high
291 #define i_author osd2.hurd2.h_i_author 284 #define i_author osd2.hurd2.h_i_author
292 #endif 285 #endif
293 286
294 #ifdef __masix__ 287 #ifdef __masix__
295 #define i_reserved1 osd1.masix1.m_i_reserv 288 #define i_reserved1 osd1.masix1.m_i_reserved1
296 #define i_frag osd2.masix2.m_i_frag 289 #define i_frag osd2.masix2.m_i_frag
297 #define i_fsize osd2.masix2.m_i_fsize 290 #define i_fsize osd2.masix2.m_i_fsize
298 #define i_reserved2 osd2.masix2.m_i_reserv 291 #define i_reserved2 osd2.masix2.m_i_reserved2
299 #endif 292 #endif
300 293
301 /* 294 /*
302 * File system states 295 * File system states
303 */ 296 */
304 #define EXT2_VALID_FS 0x0001 297 #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
305 #define EXT2_ERROR_FS 0x0002 298 #define EXT2_ERROR_FS 0x0002 /* Errors detected */
306 299
307 /* 300 /*
308 * Mount flags 301 * Mount flags
309 */ 302 */
310 #define EXT2_MOUNT_CHECK 0x0000 !! 303 #define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
311 #define EXT2_MOUNT_OLDALLOC 0x0000 !! 304 #define EXT2_MOUNT_OLDALLOC 0x0002 /* Don't use the new Orlov allocator */
312 #define EXT2_MOUNT_GRPID 0x0000 !! 305 #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
313 #define EXT2_MOUNT_DEBUG 0x0000 !! 306 #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
314 #define EXT2_MOUNT_ERRORS_CONT 0x0000 !! 307 #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
315 #define EXT2_MOUNT_ERRORS_RO 0x0000 !! 308 #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
316 #define EXT2_MOUNT_ERRORS_PANIC 0x0000 !! 309 #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
317 #define EXT2_MOUNT_MINIX_DF 0x0000 !! 310 #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
318 #define EXT2_MOUNT_NOBH 0x0001 !! 311 #define EXT2_MOUNT_NOBH 0x0100 /* No buffer_heads */
319 #define EXT2_MOUNT_NO_UID32 0x0002 !! 312 #define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
320 #define EXT2_MOUNT_XATTR_USER 0x0040 !! 313 #define EXT2_MOUNT_XATTR_USER 0x4000 /* Extended user attributes */
321 #define EXT2_MOUNT_POSIX_ACL 0x0080 !! 314 #define EXT2_MOUNT_POSIX_ACL 0x8000 /* POSIX Access Control Lists */
322 #define EXT2_MOUNT_XIP 0x0100 <<
323 #define EXT2_MOUNT_USRQUOTA 0x0200 <<
324 #define EXT2_MOUNT_GRPQUOTA 0x0400 <<
325 #define EXT2_MOUNT_RESERVATION 0x0800 <<
326 <<
327 315
328 #define clear_opt(o, opt) o &= ~ 316 #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
329 #define set_opt(o, opt) o |= E 317 #define set_opt(o, opt) o |= EXT2_MOUNT_##opt
330 #define test_opt(sb, opt) (EXT2_ 318 #define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \
331 EXT2_ 319 EXT2_MOUNT_##opt)
332 /* 320 /*
333 * Maximal mount counts between two filesystem 321 * Maximal mount counts between two filesystem checks
334 */ 322 */
335 #define EXT2_DFL_MAX_MNT_COUNT 20 323 #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
336 #define EXT2_DFL_CHECKINTERVAL 0 324 #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
337 325
338 /* 326 /*
339 * Behaviour when detecting errors 327 * Behaviour when detecting errors
340 */ 328 */
341 #define EXT2_ERRORS_CONTINUE 1 329 #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
342 #define EXT2_ERRORS_RO 2 330 #define EXT2_ERRORS_RO 2 /* Remount fs read-only */
343 #define EXT2_ERRORS_PANIC 3 331 #define EXT2_ERRORS_PANIC 3 /* Panic */
344 #define EXT2_ERRORS_DEFAULT EXT2_E 332 #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
345 333
346 /* 334 /*
347 * Structure of the super block 335 * Structure of the super block
348 */ 336 */
349 struct ext2_super_block { 337 struct ext2_super_block {
350 __le32 s_inodes_count; /* Ino 338 __le32 s_inodes_count; /* Inodes count */
351 __le32 s_blocks_count; /* Blo 339 __le32 s_blocks_count; /* Blocks count */
352 __le32 s_r_blocks_count; /* Res 340 __le32 s_r_blocks_count; /* Reserved blocks count */
353 __le32 s_free_blocks_count; /* Fre 341 __le32 s_free_blocks_count; /* Free blocks count */
354 __le32 s_free_inodes_count; /* Fre 342 __le32 s_free_inodes_count; /* Free inodes count */
355 __le32 s_first_data_block; /* Fir 343 __le32 s_first_data_block; /* First Data Block */
356 __le32 s_log_block_size; /* Blo 344 __le32 s_log_block_size; /* Block size */
357 __le32 s_log_frag_size; /* Fra 345 __le32 s_log_frag_size; /* Fragment size */
358 __le32 s_blocks_per_group; /* # B 346 __le32 s_blocks_per_group; /* # Blocks per group */
359 __le32 s_frags_per_group; /* # F 347 __le32 s_frags_per_group; /* # Fragments per group */
360 __le32 s_inodes_per_group; /* # I 348 __le32 s_inodes_per_group; /* # Inodes per group */
361 __le32 s_mtime; /* Mou 349 __le32 s_mtime; /* Mount time */
362 __le32 s_wtime; /* Wri 350 __le32 s_wtime; /* Write time */
363 __le16 s_mnt_count; /* Mou 351 __le16 s_mnt_count; /* Mount count */
364 __le16 s_max_mnt_count; /* Max 352 __le16 s_max_mnt_count; /* Maximal mount count */
365 __le16 s_magic; /* Mag 353 __le16 s_magic; /* Magic signature */
366 __le16 s_state; /* Fil 354 __le16 s_state; /* File system state */
367 __le16 s_errors; /* Beh 355 __le16 s_errors; /* Behaviour when detecting errors */
368 __le16 s_minor_rev_level; /* min 356 __le16 s_minor_rev_level; /* minor revision level */
369 __le32 s_lastcheck; /* tim 357 __le32 s_lastcheck; /* time of last check */
370 __le32 s_checkinterval; /* max 358 __le32 s_checkinterval; /* max. time between checks */
371 __le32 s_creator_os; /* OS 359 __le32 s_creator_os; /* OS */
372 __le32 s_rev_level; /* Rev 360 __le32 s_rev_level; /* Revision level */
373 __le16 s_def_resuid; /* Def 361 __le16 s_def_resuid; /* Default uid for reserved blocks */
374 __le16 s_def_resgid; /* Def 362 __le16 s_def_resgid; /* Default gid for reserved blocks */
375 /* 363 /*
376 * These fields are for EXT2_DYNAMIC_R 364 * These fields are for EXT2_DYNAMIC_REV superblocks only.
377 * 365 *
378 * Note: the difference between the co 366 * Note: the difference between the compatible feature set and
379 * the incompatible feature set is tha 367 * the incompatible feature set is that if there is a bit set
380 * in the incompatible feature set tha 368 * in the incompatible feature set that the kernel doesn't
381 * know about, it should refuse to mou 369 * know about, it should refuse to mount the filesystem.
382 * 370 *
383 * e2fsck's requirements are more stri 371 * e2fsck's requirements are more strict; if it doesn't know
384 * about a feature in either the compa 372 * about a feature in either the compatible or incompatible
385 * feature set, it must abort and not 373 * feature set, it must abort and not try to meddle with
386 * things it doesn't understand... 374 * things it doesn't understand...
387 */ 375 */
388 __le32 s_first_ino; /* Fir 376 __le32 s_first_ino; /* First non-reserved inode */
389 __le16 s_inode_size; /* siz 377 __le16 s_inode_size; /* size of inode structure */
390 __le16 s_block_group_nr; /* blo 378 __le16 s_block_group_nr; /* block group # of this superblock */
391 __le32 s_feature_compat; /* com 379 __le32 s_feature_compat; /* compatible feature set */
392 __le32 s_feature_incompat; /* inc 380 __le32 s_feature_incompat; /* incompatible feature set */
393 __le32 s_feature_ro_compat; /* rea 381 __le32 s_feature_ro_compat; /* readonly-compatible feature set */
394 __u8 s_uuid[16]; /* 128 382 __u8 s_uuid[16]; /* 128-bit uuid for volume */
395 char s_volume_name[16]; /* vol 383 char s_volume_name[16]; /* volume name */
396 char s_last_mounted[64]; /* dir 384 char s_last_mounted[64]; /* directory where last mounted */
397 __le32 s_algorithm_usage_bitmap; /* F 385 __le32 s_algorithm_usage_bitmap; /* For compression */
398 /* 386 /*
399 * Performance hints. Directory preal 387 * Performance hints. Directory preallocation should only
400 * happen if the EXT2_COMPAT_PREALLOC 388 * happen if the EXT2_COMPAT_PREALLOC flag is on.
401 */ 389 */
402 __u8 s_prealloc_blocks; /* Nr 390 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
403 __u8 s_prealloc_dir_blocks; /* Nr 391 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
404 __u16 s_padding1; 392 __u16 s_padding1;
405 /* 393 /*
406 * Journaling support valid if EXT3_FE 394 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
407 */ 395 */
408 __u8 s_journal_uuid[16]; /* uui 396 __u8 s_journal_uuid[16]; /* uuid of journal superblock */
409 __u32 s_journal_inum; /* ino 397 __u32 s_journal_inum; /* inode number of journal file */
410 __u32 s_journal_dev; /* dev 398 __u32 s_journal_dev; /* device number of journal file */
411 __u32 s_last_orphan; /* sta 399 __u32 s_last_orphan; /* start of list of inodes to delete */
412 __u32 s_hash_seed[4]; /* HTR 400 __u32 s_hash_seed[4]; /* HTREE hash seed */
413 __u8 s_def_hash_version; /* Def 401 __u8 s_def_hash_version; /* Default hash version to use */
414 __u8 s_reserved_char_pad; 402 __u8 s_reserved_char_pad;
415 __u16 s_reserved_word_pad; 403 __u16 s_reserved_word_pad;
416 __le32 s_default_mount_opts; 404 __le32 s_default_mount_opts;
417 __le32 s_first_meta_bg; /* Fir 405 __le32 s_first_meta_bg; /* First metablock block group */
418 __u32 s_reserved[190]; /* Pad 406 __u32 s_reserved[190]; /* Padding to the end of the block */
419 }; 407 };
420 408
421 /* 409 /*
422 * Codes for operating systems 410 * Codes for operating systems
423 */ 411 */
424 #define EXT2_OS_LINUX 0 412 #define EXT2_OS_LINUX 0
425 #define EXT2_OS_HURD 1 413 #define EXT2_OS_HURD 1
426 #define EXT2_OS_MASIX 2 414 #define EXT2_OS_MASIX 2
427 #define EXT2_OS_FREEBSD 3 415 #define EXT2_OS_FREEBSD 3
428 #define EXT2_OS_LITES 4 416 #define EXT2_OS_LITES 4
429 417
430 /* 418 /*
431 * Revision levels 419 * Revision levels
432 */ 420 */
433 #define EXT2_GOOD_OLD_REV 0 /* The 421 #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
434 #define EXT2_DYNAMIC_REV 1 /* V2 422 #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
435 423
436 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_ 424 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
437 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_R 425 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
438 426
439 #define EXT2_GOOD_OLD_INODE_SIZE 128 427 #define EXT2_GOOD_OLD_INODE_SIZE 128
440 428
441 /* 429 /*
442 * Feature set definitions 430 * Feature set definitions
443 */ 431 */
444 432
445 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) 433 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
446 ( EXT2_SB(sb)->s_es->s_feature_compat 434 ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
447 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) 435 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
448 ( EXT2_SB(sb)->s_es->s_feature_ro_comp 436 ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
449 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) 437 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
450 ( EXT2_SB(sb)->s_es->s_feature_incompa 438 ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
451 #define EXT2_SET_COMPAT_FEATURE(sb,mask) 439 #define EXT2_SET_COMPAT_FEATURE(sb,mask) \
452 EXT2_SB(sb)->s_es->s_feature_compat |= 440 EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
453 #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) 441 #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
454 EXT2_SB(sb)->s_es->s_feature_ro_compat 442 EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
455 #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) 443 #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
456 EXT2_SB(sb)->s_es->s_feature_incompat 444 EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
457 #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) 445 #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
458 EXT2_SB(sb)->s_es->s_feature_compat &= 446 EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
459 #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) 447 #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
460 EXT2_SB(sb)->s_es->s_feature_ro_compat 448 EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
461 #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) 449 #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
462 EXT2_SB(sb)->s_es->s_feature_incompat 450 EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
463 451
464 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 452 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
465 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 453 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
466 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 454 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
467 #define EXT2_FEATURE_COMPAT_EXT_ATTR 455 #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
468 #define EXT2_FEATURE_COMPAT_RESIZE_INO 456 #define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
469 #define EXT2_FEATURE_COMPAT_DIR_INDEX 457 #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
470 #define EXT2_FEATURE_COMPAT_ANY 458 #define EXT2_FEATURE_COMPAT_ANY 0xffffffff
471 459
472 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 460 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
473 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 461 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
474 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 462 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
475 #define EXT2_FEATURE_RO_COMPAT_ANY 463 #define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
476 464
477 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 465 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
478 #define EXT2_FEATURE_INCOMPAT_FILETYPE 466 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
479 #define EXT3_FEATURE_INCOMPAT_RECOVER 467 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
480 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 468 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
481 #define EXT2_FEATURE_INCOMPAT_META_BG 469 #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
482 #define EXT2_FEATURE_INCOMPAT_ANY 470 #define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff
483 471
484 #define EXT2_FEATURE_COMPAT_SUPP EXT2_F 472 #define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
485 #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_ 473 #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
486 EXT2_ 474 EXT2_FEATURE_INCOMPAT_META_BG)
487 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_ 475 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
488 EXT2_ 476 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
489 EXT2_ 477 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
490 #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED 478 #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
491 #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED 479 #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
492 480
493 /* 481 /*
494 * Default values for user and/or group using 482 * Default values for user and/or group using reserved blocks
495 */ 483 */
496 #define EXT2_DEF_RESUID 0 484 #define EXT2_DEF_RESUID 0
497 #define EXT2_DEF_RESGID 0 485 #define EXT2_DEF_RESGID 0
498 486
499 /* 487 /*
500 * Default mount options 488 * Default mount options
501 */ 489 */
502 #define EXT2_DEFM_DEBUG 0x0001 490 #define EXT2_DEFM_DEBUG 0x0001
503 #define EXT2_DEFM_BSDGROUPS 0x0002 491 #define EXT2_DEFM_BSDGROUPS 0x0002
504 #define EXT2_DEFM_XATTR_USER 0x0004 492 #define EXT2_DEFM_XATTR_USER 0x0004
505 #define EXT2_DEFM_ACL 0x0008 493 #define EXT2_DEFM_ACL 0x0008
506 #define EXT2_DEFM_UID16 0x0010 494 #define EXT2_DEFM_UID16 0x0010
507 /* Not used by ext2, but reserved for use 495 /* Not used by ext2, but reserved for use by ext3 */
508 #define EXT3_DEFM_JMODE 0x0060 496 #define EXT3_DEFM_JMODE 0x0060
509 #define EXT3_DEFM_JMODE_DATA 0x0020 497 #define EXT3_DEFM_JMODE_DATA 0x0020
510 #define EXT3_DEFM_JMODE_ORDERED 0x0040 498 #define EXT3_DEFM_JMODE_ORDERED 0x0040
511 #define EXT3_DEFM_JMODE_WBACK 0x0060 499 #define EXT3_DEFM_JMODE_WBACK 0x0060
512 500
513 /* 501 /*
514 * Structure of a directory entry 502 * Structure of a directory entry
515 */ 503 */
516 #define EXT2_NAME_LEN 255 504 #define EXT2_NAME_LEN 255
517 505
518 struct ext2_dir_entry { 506 struct ext2_dir_entry {
519 __le32 inode; /* Ino 507 __le32 inode; /* Inode number */
520 __le16 rec_len; /* Dir 508 __le16 rec_len; /* Directory entry length */
521 __le16 name_len; /* Nam 509 __le16 name_len; /* Name length */
522 char name[EXT2_NAME_LEN]; /* Fil 510 char name[EXT2_NAME_LEN]; /* File name */
523 }; 511 };
524 512
525 /* 513 /*
526 * The new version of the directory entry. Si 514 * The new version of the directory entry. Since EXT2 structures are
527 * stored in intel byte order, and the name_le 515 * stored in intel byte order, and the name_len field could never be
528 * bigger than 255 chars, it's safe to reclaim 516 * bigger than 255 chars, it's safe to reclaim the extra byte for the
529 * file_type field. 517 * file_type field.
530 */ 518 */
531 struct ext2_dir_entry_2 { 519 struct ext2_dir_entry_2 {
532 __le32 inode; /* Ino 520 __le32 inode; /* Inode number */
533 __le16 rec_len; /* Dir 521 __le16 rec_len; /* Directory entry length */
534 __u8 name_len; /* Nam 522 __u8 name_len; /* Name length */
535 __u8 file_type; 523 __u8 file_type;
536 char name[EXT2_NAME_LEN]; /* Fil 524 char name[EXT2_NAME_LEN]; /* File name */
537 }; 525 };
538 526
539 /* 527 /*
540 * Ext2 directory file types. Only the low 3 528 * Ext2 directory file types. Only the low 3 bits are used. The
541 * other bits are reserved for now. 529 * other bits are reserved for now.
542 */ 530 */
543 enum { 531 enum {
544 EXT2_FT_UNKNOWN, 532 EXT2_FT_UNKNOWN,
545 EXT2_FT_REG_FILE, 533 EXT2_FT_REG_FILE,
546 EXT2_FT_DIR, 534 EXT2_FT_DIR,
547 EXT2_FT_CHRDEV, 535 EXT2_FT_CHRDEV,
548 EXT2_FT_BLKDEV, 536 EXT2_FT_BLKDEV,
549 EXT2_FT_FIFO, 537 EXT2_FT_FIFO,
550 EXT2_FT_SOCK, 538 EXT2_FT_SOCK,
551 EXT2_FT_SYMLINK, 539 EXT2_FT_SYMLINK,
552 EXT2_FT_MAX 540 EXT2_FT_MAX
553 }; 541 };
554 542
555 /* 543 /*
556 * EXT2_DIR_PAD defines the directory entries 544 * EXT2_DIR_PAD defines the directory entries boundaries
557 * 545 *
558 * NOTE: It must be a multiple of 4 546 * NOTE: It must be a multiple of 4
559 */ 547 */
560 #define EXT2_DIR_PAD 4 548 #define EXT2_DIR_PAD 4
561 #define EXT2_DIR_ROUND (EXT2_ 549 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
562 #define EXT2_DIR_REC_LEN(name_len) (((nam 550 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
563 ~EXT2 551 ~EXT2_DIR_ROUND)
564 #define EXT2_MAX_REC_LEN ((1<<1 <<
565 552
566 #endif /* _LINUX_EXT2_FS_H */ 553 #endif /* _LINUX_EXT2_FS_H */
567 554
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