Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/linux/ext2_fs.h |
| 3 | * |
| 4 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 5 | * Remy Card (card@masi.ibp.fr) |
| 6 | * Laboratoire MASI - Institut Blaise Pascal |
| 7 | * Universite Pierre et Marie Curie (Paris VI) |
| 8 | * |
| 9 | * from |
| 10 | * |
| 11 | * linux/include/linux/minix_fs.h |
| 12 | * |
| 13 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 14 | */ |
| 15 | |
| 16 | #ifndef _LINUX_EXT2_FS_H |
| 17 | #define _LINUX_EXT2_FS_H |
| 18 | |
| 19 | #include <linux/types.h> |
| 20 | |
| 21 | /* |
| 22 | * The second extended filesystem constants/structures |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * Define EXT2FS_DEBUG to produce debug messages |
| 27 | */ |
| 28 | #undef EXT2FS_DEBUG |
| 29 | |
| 30 | /* |
| 31 | * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files |
| 32 | */ |
| 33 | #define EXT2_PREALLOCATE |
| 34 | |
| 35 | /* |
| 36 | * The second extended file system version |
| 37 | */ |
| 38 | #define EXT2FS_DATE "95/08/09" |
| 39 | #define EXT2FS_VERSION "0.5b" |
| 40 | |
| 41 | /* |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 42 | * Debug code |
| 43 | */ |
Theodore Ts'o | b69096a | 1997-10-20 00:37:40 +0000 | [diff] [blame] | 44 | #if 0 |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 45 | #ifdef EXT2FS_DEBUG |
| 46 | # define ext2_debug(f, a...) { \ |
| 47 | printk ("EXT2-fs DEBUG (%s, %d): %s:", \ |
| 48 | __FILE__, __LINE__, __FUNCTION__); \ |
| 49 | printk (f, ## a); \ |
| 50 | } |
| 51 | #else |
| 52 | # define ext2_debug(f, a...) /**/ |
| 53 | #endif |
Theodore Ts'o | b69096a | 1997-10-20 00:37:40 +0000 | [diff] [blame] | 54 | #endif |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 55 | |
| 56 | /* |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 57 | * Special inodes numbers |
| 58 | */ |
| 59 | #define EXT2_BAD_INO 1 /* Bad blocks inode */ |
| 60 | #define EXT2_ROOT_INO 2 /* Root inode */ |
| 61 | #define EXT2_ACL_IDX_INO 3 /* ACL inode */ |
| 62 | #define EXT2_ACL_DATA_INO 4 /* ACL inode */ |
| 63 | #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ |
| 64 | #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 65 | |
| 66 | /* First non-reserved inode for old ext2 filesystems */ |
| 67 | #define EXT2_GOOD_OLD_FIRST_INO 11 |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 68 | |
| 69 | /* |
| 70 | * The second extended file system magic number |
| 71 | */ |
| 72 | #define EXT2_SUPER_MAGIC 0xEF53 |
| 73 | |
| 74 | /* |
| 75 | * Maximal count of links to a file |
| 76 | */ |
| 77 | #define EXT2_LINK_MAX 32000 |
| 78 | |
| 79 | /* |
| 80 | * Macro-instructions used to manage several block sizes |
| 81 | */ |
| 82 | #define EXT2_MIN_BLOCK_SIZE 1024 |
| 83 | #define EXT2_MAX_BLOCK_SIZE 4096 |
| 84 | #define EXT2_MIN_BLOCK_LOG_SIZE 10 |
| 85 | #ifdef __KERNEL__ |
| 86 | # define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize) |
| 87 | #else |
| 88 | # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
| 89 | #endif |
| 90 | #define EXT2_ACLE_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_acl_entry)) |
| 91 | #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32)) |
| 92 | #ifdef __KERNEL__ |
| 93 | # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
| 94 | #else |
| 95 | # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
| 96 | #endif |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 97 | #ifdef __KERNEL__ |
| 98 | #define EXT2_ADDR_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_addr_per_block_bits) |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 99 | #define EXT2_INODE_SIZE(s) ((s)->u.ext2_sb.s_inode_size) |
| 100 | #define EXT2_FIRST_INO(s) ((s)->u.ext2_sb.s_first_ino) |
| 101 | #else |
| 102 | #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ |
| 103 | EXT2_GOOD_OLD_INODE_SIZE : \ |
| 104 | (s)->s_inode_size) |
| 105 | #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ |
| 106 | EXT2_GOOD_OLD_FIRST_INO : \ |
| 107 | (s)->s_first_ino) |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 108 | #endif |
| 109 | |
| 110 | /* |
| 111 | * Macro-instructions used to manage fragments |
| 112 | */ |
| 113 | #define EXT2_MIN_FRAG_SIZE 1024 |
| 114 | #define EXT2_MAX_FRAG_SIZE 4096 |
| 115 | #define EXT2_MIN_FRAG_LOG_SIZE 10 |
| 116 | #ifdef __KERNEL__ |
| 117 | # define EXT2_FRAG_SIZE(s) ((s)->u.ext2_sb.s_frag_size) |
| 118 | # define EXT2_FRAGS_PER_BLOCK(s) ((s)->u.ext2_sb.s_frags_per_block) |
| 119 | #else |
| 120 | # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) |
| 121 | # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) |
| 122 | #endif |
| 123 | |
| 124 | /* |
| 125 | * ACL structures |
| 126 | */ |
| 127 | struct ext2_acl_header /* Header of Access Control Lists */ |
| 128 | { |
| 129 | __u32 aclh_size; |
| 130 | __u32 aclh_file_count; |
| 131 | __u32 aclh_acle_count; |
| 132 | __u32 aclh_first_acle; |
| 133 | }; |
| 134 | |
| 135 | struct ext2_acl_entry /* Access Control List Entry */ |
| 136 | { |
| 137 | __u32 acle_size; |
| 138 | __u16 acle_perms; /* Access permissions */ |
| 139 | __u16 acle_type; /* Type of entry */ |
| 140 | __u16 acle_tag; /* User or group identity */ |
| 141 | __u16 acle_pad1; |
| 142 | __u32 acle_next; /* Pointer on next entry for the */ |
| 143 | /* same inode or on next free entry */ |
| 144 | }; |
| 145 | |
| 146 | /* |
| 147 | * Structure of a blocks group descriptor |
| 148 | */ |
| 149 | struct ext2_group_desc |
| 150 | { |
| 151 | __u32 bg_block_bitmap; /* Blocks bitmap block */ |
| 152 | __u32 bg_inode_bitmap; /* Inodes bitmap block */ |
| 153 | __u32 bg_inode_table; /* Inodes table block */ |
| 154 | __u16 bg_free_blocks_count; /* Free blocks count */ |
| 155 | __u16 bg_free_inodes_count; /* Free inodes count */ |
| 156 | __u16 bg_used_dirs_count; /* Directories count */ |
| 157 | __u16 bg_pad; |
| 158 | __u32 bg_reserved[3]; |
| 159 | }; |
| 160 | |
| 161 | /* |
| 162 | * Macro-instructions used to manage group descriptors |
| 163 | */ |
| 164 | #ifdef __KERNEL__ |
| 165 | # define EXT2_BLOCKS_PER_GROUP(s) ((s)->u.ext2_sb.s_blocks_per_group) |
| 166 | # define EXT2_DESC_PER_BLOCK(s) ((s)->u.ext2_sb.s_desc_per_block) |
| 167 | # define EXT2_INODES_PER_GROUP(s) ((s)->u.ext2_sb.s_inodes_per_group) |
| 168 | # define EXT2_DESC_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_desc_per_block_bits) |
| 169 | #else |
| 170 | # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
| 171 | # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc)) |
| 172 | # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
| 173 | #endif |
| 174 | |
| 175 | /* |
| 176 | * Constants relative to the data blocks |
| 177 | */ |
| 178 | #define EXT2_NDIR_BLOCKS 12 |
| 179 | #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS |
| 180 | #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) |
| 181 | #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) |
| 182 | #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) |
| 183 | |
| 184 | /* |
| 185 | * Inode flags |
| 186 | */ |
| 187 | #define EXT2_SECRM_FL 0x00000001 /* Secure deletion */ |
| 188 | #define EXT2_UNRM_FL 0x00000002 /* Undelete */ |
| 189 | #define EXT2_COMPR_FL 0x00000004 /* Compress file */ |
| 190 | #define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */ |
| 191 | #define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */ |
| 192 | #define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */ |
| 193 | #define EXT2_NODUMP_FL 0x00000040 /* do not dump file */ |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 194 | #define EXT2_NOATIME_FL 0x00000080 /* do not update atime */ |
| 195 | #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ |
| 196 | |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 197 | /* |
| 198 | * ioctl commands |
| 199 | */ |
| 200 | #define EXT2_IOC_GETFLAGS _IOR('f', 1, long) |
| 201 | #define EXT2_IOC_SETFLAGS _IOW('f', 2, long) |
| 202 | #define EXT2_IOC_GETVERSION _IOR('v', 1, long) |
| 203 | #define EXT2_IOC_SETVERSION _IOW('v', 2, long) |
| 204 | |
| 205 | /* |
| 206 | * Structure of an inode on the disk |
| 207 | */ |
| 208 | struct ext2_inode { |
| 209 | __u16 i_mode; /* File mode */ |
| 210 | __u16 i_uid; /* Owner Uid */ |
| 211 | __u32 i_size; /* Size in bytes */ |
| 212 | __u32 i_atime; /* Access time */ |
| 213 | __u32 i_ctime; /* Creation time */ |
| 214 | __u32 i_mtime; /* Modification time */ |
| 215 | __u32 i_dtime; /* Deletion Time */ |
| 216 | __u16 i_gid; /* Group Id */ |
| 217 | __u16 i_links_count; /* Links count */ |
| 218 | __u32 i_blocks; /* Blocks count */ |
| 219 | __u32 i_flags; /* File flags */ |
| 220 | union { |
| 221 | struct { |
| 222 | __u32 l_i_reserved1; |
| 223 | } linux1; |
| 224 | struct { |
| 225 | __u32 h_i_translator; |
| 226 | } hurd1; |
| 227 | struct { |
| 228 | __u32 m_i_reserved1; |
| 229 | } masix1; |
| 230 | } osd1; /* OS dependent 1 */ |
| 231 | __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ |
| 232 | __u32 i_version; /* File version (for NFS) */ |
| 233 | __u32 i_file_acl; /* File ACL */ |
| 234 | __u32 i_dir_acl; /* Directory ACL */ |
| 235 | __u32 i_faddr; /* Fragment address */ |
| 236 | union { |
| 237 | struct { |
| 238 | __u8 l_i_frag; /* Fragment number */ |
| 239 | __u8 l_i_fsize; /* Fragment size */ |
| 240 | __u16 i_pad1; |
| 241 | __u32 l_i_reserved2[2]; |
| 242 | } linux2; |
| 243 | struct { |
| 244 | __u8 h_i_frag; /* Fragment number */ |
| 245 | __u8 h_i_fsize; /* Fragment size */ |
| 246 | __u16 h_i_mode_high; |
| 247 | __u16 h_i_uid_high; |
| 248 | __u16 h_i_gid_high; |
| 249 | __u32 h_i_author; |
| 250 | } hurd2; |
| 251 | struct { |
| 252 | __u8 m_i_frag; /* Fragment number */ |
| 253 | __u8 m_i_fsize; /* Fragment size */ |
| 254 | __u16 m_pad1; |
| 255 | __u32 m_i_reserved2[2]; |
| 256 | } masix2; |
| 257 | } osd2; /* OS dependent 2 */ |
| 258 | }; |
| 259 | |
| 260 | #if defined(__KERNEL__) || defined(__linux__) |
| 261 | #define i_reserved1 osd1.linux1.l_i_reserved1 |
| 262 | #define i_frag osd2.linux2.l_i_frag |
| 263 | #define i_fsize osd2.linux2.l_i_fsize |
| 264 | #define i_reserved2 osd2.linux2.l_i_reserved2 |
| 265 | #endif |
| 266 | |
| 267 | #ifdef __hurd__ |
| 268 | #define i_translator osd1.hurd1.h_i_translator |
| 269 | #define i_frag osd2.hurd2.h_i_frag; |
| 270 | #define i_fsize osd2.hurd2.h_i_fsize; |
| 271 | #define i_uid_high osd2.hurd2.h_i_uid_high |
| 272 | #define i_gid_high osd2.hurd2.h_i_gid_high |
| 273 | #define i_author osd2.hurd2.h_i_author |
| 274 | #endif |
| 275 | |
| 276 | #ifdef __masix__ |
| 277 | #define i_reserved1 osd1.masix1.m_i_reserved1 |
| 278 | #define i_frag osd2.masix2.m_i_frag |
| 279 | #define i_fsize osd2.masix2.m_i_fsize |
| 280 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
| 281 | #endif |
| 282 | |
| 283 | /* |
| 284 | * File system states |
| 285 | */ |
| 286 | #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ |
| 287 | #define EXT2_ERROR_FS 0x0002 /* Errors detected */ |
| 288 | |
| 289 | /* |
| 290 | * Mount flags |
| 291 | */ |
| 292 | #define EXT2_MOUNT_CHECK_NORMAL 0x0001 /* Do some more checks */ |
| 293 | #define EXT2_MOUNT_CHECK_STRICT 0x0002 /* Do again more checks */ |
| 294 | #define EXT2_MOUNT_CHECK (EXT2_MOUNT_CHECK_NORMAL | \ |
| 295 | EXT2_MOUNT_CHECK_STRICT) |
| 296 | #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */ |
| 297 | #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */ |
| 298 | #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */ |
| 299 | #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */ |
| 300 | #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */ |
| 301 | #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */ |
| 302 | |
| 303 | #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt |
| 304 | #define set_opt(o, opt) o |= EXT2_MOUNT_##opt |
| 305 | #define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \ |
| 306 | EXT2_MOUNT_##opt) |
| 307 | /* |
| 308 | * Maximal mount counts between two filesystem checks |
| 309 | */ |
| 310 | #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
| 311 | #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ |
| 312 | |
| 313 | /* |
| 314 | * Behaviour when detecting errors |
| 315 | */ |
| 316 | #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ |
| 317 | #define EXT2_ERRORS_RO 2 /* Remount fs read-only */ |
| 318 | #define EXT2_ERRORS_PANIC 3 /* Panic */ |
| 319 | #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE |
| 320 | |
| 321 | /* |
| 322 | * Structure of the super block |
| 323 | */ |
| 324 | struct ext2_super_block { |
| 325 | __u32 s_inodes_count; /* Inodes count */ |
| 326 | __u32 s_blocks_count; /* Blocks count */ |
| 327 | __u32 s_r_blocks_count; /* Reserved blocks count */ |
| 328 | __u32 s_free_blocks_count; /* Free blocks count */ |
| 329 | __u32 s_free_inodes_count; /* Free inodes count */ |
| 330 | __u32 s_first_data_block; /* First Data Block */ |
| 331 | __u32 s_log_block_size; /* Block size */ |
| 332 | __s32 s_log_frag_size; /* Fragment size */ |
| 333 | __u32 s_blocks_per_group; /* # Blocks per group */ |
| 334 | __u32 s_frags_per_group; /* # Fragments per group */ |
| 335 | __u32 s_inodes_per_group; /* # Inodes per group */ |
| 336 | __u32 s_mtime; /* Mount time */ |
| 337 | __u32 s_wtime; /* Write time */ |
| 338 | __u16 s_mnt_count; /* Mount count */ |
| 339 | __s16 s_max_mnt_count; /* Maximal mount count */ |
| 340 | __u16 s_magic; /* Magic signature */ |
| 341 | __u16 s_state; /* File system state */ |
| 342 | __u16 s_errors; /* Behaviour when detecting errors */ |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 343 | __u16 s_minor_rev_level; /* minor revision level */ |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 344 | __u32 s_lastcheck; /* time of last check */ |
| 345 | __u32 s_checkinterval; /* max. time between checks */ |
| 346 | __u32 s_creator_os; /* OS */ |
| 347 | __u32 s_rev_level; /* Revision level */ |
| 348 | __u16 s_def_resuid; /* Default uid for reserved blocks */ |
| 349 | __u16 s_def_resgid; /* Default gid for reserved blocks */ |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 350 | /* |
| 351 | * These fields are for EXT2_DYNAMIC_REV superblocks only. |
| 352 | * |
| 353 | * Note: the difference between the compatible feature set and |
| 354 | * the incompatible feature set is that if there is a bit set |
| 355 | * in the incompatible feature set that the kernel doesn't |
| 356 | * know about, it should refuse to mount the filesystem. |
| 357 | * |
| 358 | * e2fsck's requirements are more strict; if it doesn't know |
| 359 | * about a feature in either the compatible or incompatible |
| 360 | * feature set, it must abort and not try to meddle with |
| 361 | * things it doesn't understand... |
| 362 | */ |
| 363 | __u32 s_first_ino; /* First non-reserved inode */ |
| 364 | __u16 s_inode_size; /* size of inode structure */ |
| 365 | __u16 s_block_group_nr; /* block group # of this superblock */ |
| 366 | __u32 s_feature_compat; /* compatible feature set */ |
| 367 | __u32 s_feature_incompat; /* incompatible feature set */ |
| 368 | __u32 s_feature_ro_compat; /* readonly-compatible feature set */ |
| 369 | __u8 s_uuid[16]; /* 128-bit uuid for volume */ |
| 370 | char s_volume_name[16]; /* volume name */ |
| 371 | char s_last_mounted[64]; /* directory where last mounted */ |
| 372 | __u32 s_reserved[206]; /* Padding to the end of the block */ |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 373 | }; |
| 374 | |
| 375 | /* |
| 376 | * Codes for operating systems |
| 377 | */ |
| 378 | #define EXT2_OS_LINUX 0 |
| 379 | #define EXT2_OS_HURD 1 |
| 380 | #define EXT2_OS_MASIX 2 |
| 381 | #define EXT2_OS_FREEBSD 3 |
| 382 | #define EXT2_OS_LITES 4 |
| 383 | |
| 384 | /* |
| 385 | * Revision levels |
| 386 | */ |
| 387 | #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 388 | #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 389 | |
| 390 | #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 391 | #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV |
| 392 | |
| 393 | #define EXT2_GOOD_OLD_INODE_SIZE 128 |
| 394 | |
| 395 | /* |
| 396 | * Feature set definitions |
| 397 | */ |
| 398 | |
| 399 | #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 |
| 400 | |
| 401 | #define EXT2_FEATURE_COMPAT_SUPP 0 |
| 402 | #define EXT2_FEATURE_INCOMPAT_SUPP 0 |
| 403 | #define EXT2_FEATURE_RO_COMPAT_SUPP EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 404 | |
| 405 | /* |
| 406 | * Default values for user and/or group using reserved blocks |
| 407 | */ |
| 408 | #define EXT2_DEF_RESUID 0 |
| 409 | #define EXT2_DEF_RESGID 0 |
| 410 | |
| 411 | /* |
| 412 | * Structure of a directory entry |
| 413 | */ |
| 414 | #define EXT2_NAME_LEN 255 |
| 415 | |
| 416 | struct ext2_dir_entry { |
| 417 | __u32 inode; /* Inode number */ |
| 418 | __u16 rec_len; /* Directory entry length */ |
| 419 | __u16 name_len; /* Name length */ |
| 420 | char name[EXT2_NAME_LEN]; /* File name */ |
| 421 | }; |
| 422 | |
| 423 | /* |
| 424 | * EXT2_DIR_PAD defines the directory entries boundaries |
| 425 | * |
| 426 | * NOTE: It must be a multiple of 4 |
| 427 | */ |
| 428 | #define EXT2_DIR_PAD 4 |
| 429 | #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) |
| 430 | #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ |
| 431 | ~EXT2_DIR_ROUND) |
| 432 | |
| 433 | #ifdef __KERNEL__ |
| 434 | /* |
| 435 | * Function prototypes |
| 436 | */ |
| 437 | |
| 438 | /* |
| 439 | * Ok, these declarations are also in <linux/kernel.h> but none of the |
| 440 | * ext2 source programs needs to include it so they are duplicated here. |
| 441 | */ |
| 442 | #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) |
| 443 | # define NORET_TYPE __volatile__ |
| 444 | # define ATTRIB_NORET /**/ |
| 445 | # define NORET_AND /**/ |
| 446 | #else |
| 447 | # define NORET_TYPE /**/ |
| 448 | # define ATTRIB_NORET __attribute__((noreturn)) |
| 449 | # define NORET_AND noreturn, |
| 450 | #endif |
| 451 | |
| 452 | /* acl.c */ |
| 453 | extern int ext2_permission (struct inode *, int); |
| 454 | |
| 455 | /* balloc.c */ |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 456 | extern int ext2_new_block (const struct inode *, unsigned long, |
| 457 | __u32 *, __u32 *, int *); |
| 458 | extern void ext2_free_blocks (const struct inode *, unsigned long, |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 459 | unsigned long); |
| 460 | extern unsigned long ext2_count_free_blocks (struct super_block *); |
| 461 | extern void ext2_check_blocks_bitmap (struct super_block *); |
| 462 | |
| 463 | /* bitmap.c */ |
| 464 | extern unsigned long ext2_count_free (struct buffer_head *, unsigned); |
| 465 | |
| 466 | /* dir.c */ |
| 467 | extern int ext2_check_dir_entry (const char *, struct inode *, |
| 468 | struct ext2_dir_entry *, struct buffer_head *, |
| 469 | unsigned long); |
| 470 | |
| 471 | /* file.c */ |
| 472 | extern int ext2_read (struct inode *, struct file *, char *, int); |
| 473 | extern int ext2_write (struct inode *, struct file *, char *, int); |
| 474 | |
| 475 | /* fsync.c */ |
| 476 | extern int ext2_sync_file (struct inode *, struct file *); |
| 477 | |
| 478 | /* ialloc.c */ |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 479 | extern struct inode * ext2_new_inode (const struct inode *, int, int *); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 480 | extern void ext2_free_inode (struct inode *); |
| 481 | extern unsigned long ext2_count_free_inodes (struct super_block *); |
| 482 | extern void ext2_check_inodes_bitmap (struct super_block *); |
| 483 | |
| 484 | /* inode.c */ |
| 485 | extern int ext2_bmap (struct inode *, int); |
| 486 | |
| 487 | extern struct buffer_head * ext2_getblk (struct inode *, long, int, int *); |
| 488 | extern struct buffer_head * ext2_bread (struct inode *, int, int, int *); |
| 489 | |
| 490 | extern int ext2_getcluster (struct inode * inode, long block); |
| 491 | extern void ext2_read_inode (struct inode *); |
| 492 | extern void ext2_write_inode (struct inode *); |
| 493 | extern void ext2_put_inode (struct inode *); |
| 494 | extern int ext2_sync_inode (struct inode *); |
| 495 | extern void ext2_discard_prealloc (struct inode *); |
| 496 | |
| 497 | /* ioctl.c */ |
| 498 | extern int ext2_ioctl (struct inode *, struct file *, unsigned int, |
| 499 | unsigned long); |
| 500 | |
| 501 | /* namei.c */ |
| 502 | extern void ext2_release (struct inode *, struct file *); |
| 503 | extern int ext2_lookup (struct inode *,const char *, int, struct inode **); |
| 504 | extern int ext2_create (struct inode *,const char *, int, int, |
| 505 | struct inode **); |
| 506 | extern int ext2_mkdir (struct inode *, const char *, int, int); |
| 507 | extern int ext2_rmdir (struct inode *, const char *, int); |
| 508 | extern int ext2_unlink (struct inode *, const char *, int); |
| 509 | extern int ext2_symlink (struct inode *, const char *, int, const char *); |
| 510 | extern int ext2_link (struct inode *, struct inode *, const char *, int); |
| 511 | extern int ext2_mknod (struct inode *, const char *, int, int, int); |
| 512 | extern int ext2_rename (struct inode *, const char *, int, |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 513 | struct inode *, const char *, int, int); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 514 | |
| 515 | /* super.c */ |
| 516 | extern void ext2_error (struct super_block *, const char *, const char *, ...) |
| 517 | __attribute__ ((format (printf, 3, 4))); |
| 518 | extern NORET_TYPE void ext2_panic (struct super_block *, const char *, |
| 519 | const char *, ...) |
| 520 | __attribute__ ((NORET_AND format (printf, 3, 4))); |
| 521 | extern void ext2_warning (struct super_block *, const char *, const char *, ...) |
| 522 | __attribute__ ((format (printf, 3, 4))); |
| 523 | extern void ext2_put_super (struct super_block *); |
| 524 | extern void ext2_write_super (struct super_block *); |
| 525 | extern int ext2_remount (struct super_block *, int *, char *); |
| 526 | extern struct super_block * ext2_read_super (struct super_block *,void *,int); |
Theodore Ts'o | 521e368 | 1997-04-29 17:48:10 +0000 | [diff] [blame] | 527 | extern int init_ext2_fs(void); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 528 | extern void ext2_statfs (struct super_block *, struct statfs *, int); |
| 529 | |
| 530 | /* truncate.c */ |
| 531 | extern void ext2_truncate (struct inode *); |
| 532 | |
| 533 | /* |
| 534 | * Inodes and files operations |
| 535 | */ |
| 536 | |
| 537 | /* dir.c */ |
| 538 | extern struct inode_operations ext2_dir_inode_operations; |
| 539 | |
| 540 | /* file.c */ |
| 541 | extern struct inode_operations ext2_file_inode_operations; |
| 542 | |
| 543 | /* symlink.c */ |
| 544 | extern struct inode_operations ext2_symlink_inode_operations; |
| 545 | |
| 546 | #endif /* __KERNEL__ */ |
| 547 | |
| 548 | #endif /* _LINUX_EXT2_FS_H */ |