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 f(C) 1991, 1992 Linus Torvalds 14 */ 15 16 #pragma once 17 18 #include "types.h" /* Changed from linux/types.h */ 19 20 /* 21 * The second extended filesystem constants/structures 22 */ 23 24 /* 25 * Define EXT2FS_DEBUG to produce debug messages 26 */ 27 #undef EXT2FS_DEBUG 28 29 /* 30 * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files 31 */ 32 #define EXT2_PREALLOCATE 33 #define EXT2_DEFAULT_PREALLOC_BLOCKS 8 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 /* 42 * Special inodes numbers 43 */ 44 #define EXT2_BAD_INO 1 /* Bad blocks inode */ 45 #define EXT2_ROOT_INO 2 /* Root inode */ 46 #define EXT2_ACL_IDX_INO 3 /* ACL inode */ 47 #define EXT2_ACL_DATA_INO 4 /* ACL inode */ 48 #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ 49 #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ 50 #define EXT2_RESIZE_INO 7 /* Reserved group descriptors inode */ 51 #define EXT2_JOURNAL_INO 8 /* Journal inode */ 52 53 /* First non-reserved inode for old ext2 filesystems */ 54 #define EXT2_GOOD_OLD_FIRST_INO 11 55 56 /* 57 * The second extended file system magic number 58 */ 59 #define EXT2_SUPER_MAGIC 0xEF53 60 61 /* 62 * Maximal count of links to a file 63 */ 64 #define EXT2_LINK_MAX 32000 65 66 /* 67 * Macro-instructions used to manage several block sizes 68 */ 69 #define EXT2_MIN_BLOCK_SIZE 1024 70 #define EXT2_MAX_BLOCK_SIZE 4096 71 #define EXT2_MIN_BLOCK_LOG_SIZE 10 72 #ifdef __KERNEL__ 73 # define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize) 74 #else 75 # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) 76 #endif 77 #define EXT2_ACLE_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_acl_entry)) 78 #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32)) 79 #ifdef __KERNEL__ 80 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 81 #else 82 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 83 #endif 84 #ifdef __KERNEL__ 85 #define EXT2_ADDR_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_addr_per_block_bits) 86 #define EXT2_INODE_SIZE(s) ((s)->u.ext2_sb.s_inode_size) 87 #define EXT2_FIRST_INO(s) ((s)->u.ext2_sb.s_first_ino) 88 #else 89 #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 90 EXT2_GOOD_OLD_INODE_SIZE : \ 91 (s)->s_inode_size) 92 #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 93 EXT2_GOOD_OLD_FIRST_INO : \ 94 (s)->s_first_ino) 95 #endif 96 97 /* 98 * Macro-instructions used to manage fragments 99 */ 100 #define EXT2_MIN_FRAG_SIZE 1024 101 #define EXT2_MAX_FRAG_SIZE 4096 102 #define EXT2_MIN_FRAG_LOG_SIZE 10 103 #ifdef __KERNEL__ 104 # define EXT2_FRAG_SIZE(s) ((s)->u.ext2_sb.s_frag_size) 105 # define EXT2_FRAGS_PER_BLOCK(s) ((s)->u.ext2_sb.s_frags_per_block) 106 #else 107 # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) 108 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) 109 #endif 110 111 /* 112 * ACL structures 113 */ 114 struct ext2_acl_header /* Header of Access Control Lists */ 115 { 116 __u32 aclh_size; 117 __u32 aclh_file_count; 118 __u32 aclh_acle_count; 119 __u32 aclh_first_acle; 120 }; 121 122 struct ext2_acl_entry /* Access Control List Entry */ 123 { 124 __u32 acle_size; 125 __u16 acle_perms; /* Access permissions */ 126 __u16 acle_type; /* Type of entry */ 127 __u16 acle_tag; /* User or group identity */ 128 __u16 acle_pad1; 129 __u32 acle_next; /* Pointer on next entry for the */ 130 /* same inode or on next free entry */ 131 }; 132 133 /* 134 * Structure of a blocks group descriptor 135 */ 136 struct ext2_group_desc 137 { 138 __u32 bg_block_bitmap; /* Blocks bitmap block */ 139 __u32 bg_inode_bitmap; /* Inodes bitmap block */ 140 __u32 bg_inode_table; /* Inodes table block */ 141 __u16 bg_free_blocks_count; /* Free blocks count */ 142 __u16 bg_free_inodes_count; /* Free inodes count */ 143 __u16 bg_used_dirs_count; /* Directories count */ 144 __u16 bg_pad; 145 __u32 bg_reserved[3]; 146 }; 147 148 /* 149 * Data structures used by the directory indexing feature 150 * 151 * Note: all of the multibyte integer fields are little endian. 152 */ 153 154 /* 155 * Note: dx_root_info is laid out so that if it should somehow get 156 * overlaid by a dirent the two low bits of the hash version will be 157 * zero. Therefore, the hash version mod 4 should never be 0. 158 * Sincerely, the paranoia department. 159 */ 160 struct ext2_dx_root_info { 161 __u32 reserved_zero; 162 __u8 hash_version; /* 0 now, 1 at release */ 163 __u8 info_length; /* 8 */ 164 __u8 indirect_levels; 165 __u8 unused_flags; 166 }; 167 168 struct ext2_dx_entry { 169 __u32 hash; 170 __u32 block; 171 }; 172 173 struct ext2_dx_countlimit { 174 __u16 limit; 175 __u16 count; 176 }; 177 178 179 /* 180 * Macro-instructions used to manage group descriptors 181 */ 182 #ifdef __KERNEL__ 183 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->u.ext2_sb.s_blocks_per_group) 184 # define EXT2_DESC_PER_BLOCK(s) ((s)->u.ext2_sb.s_desc_per_block) 185 # define EXT2_INODES_PER_GROUP(s) ((s)->u.ext2_sb.s_inodes_per_group) 186 # define EXT2_DESC_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_desc_per_block_bits) 187 #else 188 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 189 # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc)) 190 # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 191 #endif 192 193 /* 194 * Constants relative to the data blocks 195 */ 196 #define EXT2_NDIR_BLOCKS 12 197 #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 198 #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 199 #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 200 #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 201 202 /* 203 * Inode flags 204 */ 205 #define EXT2_SECRM_FL 0x00000001 /* Secure deletion */ 206 #define EXT2_UNRM_FL 0x00000002 /* Undelete */ 207 #define EXT2_COMPR_FL 0x00000004 /* Compress file */ 208 #define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */ 209 #define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */ 210 #define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */ 211 #define EXT2_NODUMP_FL 0x00000040 /* do not dump file */ 212 #define EXT2_NOATIME_FL 0x00000080 /* do not update atime */ 213 /* Reserved for compression usage... */ 214 #define EXT2_DIRTY_FL 0x00000100 215 #define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 216 #define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */ 217 #define EXT2_ECOMPR_FL 0x00000800 /* Compression error */ 218 /* End compression flags --- maybe not all used */ 219 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */ 220 #define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */ 221 #define EXT2_IMAGIC_FL 0x00002000 222 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 223 #define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 224 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ 225 226 #define EXT2_FL_USER_VISIBLE 0x0000DFFF /* User visible flags */ 227 #define EXT2_FL_USER_MODIFIABLE 0x000080FF /* User modifiable flags */ 228 229 /* 230 * ioctl commands 231 */ 232 #define EXT2_IOC_GETFLAGS _IOR('f', 1, long) 233 #define EXT2_IOC_SETFLAGS _IOW('f', 2, long) 234 #define EXT2_IOC_GETVERSION _IOR('v', 1, long) 235 #define EXT2_IOC_SETVERSION _IOW('v', 2, long) 236 237 /* 238 * Structure of an inode on the disk 239 */ 240 struct ext2_inode { 241 __u16 i_mode; /* File mode */ 242 __u16 i_uid; /* Low 16 bits of Owner Uid */ 243 __u32 i_size; /* Size in bytes */ 244 __u32 i_atime; /* Access time */ 245 __u32 i_ctime; /* Creation time */ 246 __u32 i_mtime; /* Modification time */ 247 __u32 i_dtime; /* Deletion Time */ 248 __u16 i_gid; /* Low 16 bits of Group Id */ 249 __u16 i_links_count; /* Links count */ 250 __u32 i_blocks; /* Blocks count */ 251 __u32 i_flags; /* File flags */ 252 union { 253 struct { 254 __u32 l_i_reserved1; 255 } linux1; 256 struct { 257 __u32 h_i_translator; 258 } hurd1; 259 struct { 260 __u32 m_i_reserved1; 261 } masix1; 262 } osd1; /* OS dependent 1 */ 263 __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ 264 __u32 i_generation; /* File version (for NFS) */ 265 __u32 i_file_acl; /* File ACL */ 266 __u32 i_dir_acl; /* Directory ACL */ 267 __u32 i_faddr; /* Fragment address */ 268 union { 269 struct { 270 __u8 l_i_frag; /* Fragment number */ 271 __u8 l_i_fsize; /* Fragment size */ 272 __u16 i_pad1; 273 __u16 l_i_uid_high; /* these 2 fields */ 274 __u16 l_i_gid_high; /* were reserved2[0] */ 275 __u32 l_i_reserved2; 276 } linux2; 277 struct { 278 __u8 h_i_frag; /* Fragment number */ 279 __u8 h_i_fsize; /* Fragment size */ 280 __u16 h_i_mode_high; 281 __u16 h_i_uid_high; 282 __u16 h_i_gid_high; 283 __u32 h_i_author; 284 } hurd2; 285 struct { 286 __u8 m_i_frag; /* Fragment number */ 287 __u8 m_i_fsize; /* Fragment size */ 288 __u16 m_pad1; 289 __u32 m_i_reserved2[2]; 290 } masix2; 291 } osd2; /* OS dependent 2 */ 292 }; 293 294 #define i_size_high i_dir_acl 295 296 #if defined(__KERNEL__) || defined(__linux__) 297 #define i_reserved1 osd1.linux1.l_i_reserved1 298 #define i_frag osd2.linux2.l_i_frag 299 #define i_fsize osd2.linux2.l_i_fsize 300 #define i_uid_low i_uid 301 #define i_gid_low i_gid 302 #define i_uid_high osd2.linux2.l_i_uid_high 303 #define i_gid_high osd2.linux2.l_i_gid_high 304 #define i_reserved2 osd2.linux2.l_i_reserved2 305 306 #elif defined(__GNU__) 307 308 #define i_translator osd1.hurd1.h_i_translator 309 #define i_frag osd2.hurd2.h_i_frag; 310 #define i_fsize osd2.hurd2.h_i_fsize; 311 #define i_uid_high osd2.hurd2.h_i_uid_high 312 #define i_gid_high osd2.hurd2.h_i_gid_high 313 #define i_author osd2.hurd2.h_i_author 314 315 #elif defined(__masix__) 316 317 #define i_reserved1 osd1.masix1.m_i_reserved1 318 #define i_frag osd2.masix2.m_i_frag 319 #define i_fsize osd2.masix2.m_i_fsize 320 #define i_reserved2 osd2.masix2.m_i_reserved2 321 322 #endif /* defined(__KERNEL) || defined(__linux__) */ 323 324 /* 325 * File system states 326 */ 327 #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ 328 #define EXT2_ERROR_FS 0x0002 /* Errors detected */ 329 330 /* 331 * Mount flags 332 */ 333 #define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */ 334 #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */ 335 #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */ 336 #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */ 337 #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */ 338 #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */ 339 #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */ 340 #define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */ 341 342 #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt 343 #define set_opt(o, opt) o |= EXT2_MOUNT_##opt 344 #define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \ 345 EXT2_MOUNT_##opt) 346 /* 347 * Maximal mount counts between two filesystem checks 348 */ 349 #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 350 #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 351 352 /* 353 * Behaviour when detecting errors 354 */ 355 #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ 356 #define EXT2_ERRORS_RO 2 /* Remount fs read-only */ 357 #define EXT2_ERRORS_PANIC 3 /* Panic */ 358 #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE 359 360 /* 361 * Structure of the super block 362 */ 363 struct ext2_super_block { 364 __u32 s_inodes_count; /* Inodes count */ 365 __u32 s_blocks_count; /* Blocks count */ 366 __u32 s_r_blocks_count; /* Reserved blocks count */ 367 __u32 s_free_blocks_count; /* Free blocks count */ 368 __u32 s_free_inodes_count; /* Free inodes count */ 369 __u32 s_first_data_block; /* First Data Block */ 370 __u32 s_log_block_size; /* Block size */ 371 __s32 s_log_frag_size; /* Fragment size */ 372 __u32 s_blocks_per_group; /* # Blocks per group */ 373 __u32 s_frags_per_group; /* # Fragments per group */ 374 __u32 s_inodes_per_group; /* # Inodes per group */ 375 __u32 s_mtime; /* Mount time */ 376 __u32 s_wtime; /* Write time */ 377 __u16 s_mnt_count; /* Mount count */ 378 __s16 s_max_mnt_count; /* Maximal mount count */ 379 __u16 s_magic; /* Magic signature */ 380 __u16 s_state; /* File system state */ 381 __u16 s_errors; /* Behaviour when detecting errors */ 382 __u16 s_minor_rev_level; /* minor revision level */ 383 __u32 s_lastcheck; /* time of last check */ 384 __u32 s_checkinterval; /* max. time between checks */ 385 __u32 s_creator_os; /* OS */ 386 __u32 s_rev_level; /* Revision level */ 387 __u16 s_def_resuid; /* Default uid for reserved blocks */ 388 __u16 s_def_resgid; /* Default gid for reserved blocks */ 389 /* 390 * These fields are for EXT2_DYNAMIC_REV superblocks only. 391 * 392 * Note: the difference between the compatible feature set and 393 * the incompatible feature set is that if there is a bit set 394 * in the incompatible feature set that the kernel doesn't 395 * know about, it should refuse to mount the filesystem. 396 * 397 * e2fsck's requirements are more strict; if it doesn't know 398 * about a feature in either the compatible or incompatible 399 * feature set, it must abort and not try to meddle with 400 * things it doesn't understand... 401 */ 402 __u32 s_first_ino; /* First non-reserved inode */ 403 __u16 s_inode_size; /* size of inode structure */ 404 __u16 s_block_group_nr; /* block group # of this superblock */ 405 __u32 s_feature_compat; /* compatible feature set */ 406 __u32 s_feature_incompat; /* incompatible feature set */ 407 __u32 s_feature_ro_compat; /* readonly-compatible feature set */ 408 __u8 s_uuid[16]; /* 128-bit uuid for volume */ 409 char s_volume_name[16]; /* volume name */ 410 char s_last_mounted[64]; /* directory where last mounted */ 411 __u32 s_algorithm_usage_bitmap; /* For compression */ 412 /* 413 * Performance hints. Directory preallocation should only 414 * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on. 415 */ 416 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 417 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 418 __u16 s_padding1; 419 /* 420 * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set. 421 */ 422 __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 423 __u32 s_journal_inum; /* inode number of journal file */ 424 __u32 s_journal_dev; /* device number of journal file */ 425 __u32 s_last_orphan; /* start of list of inodes to delete */ 426 427 __u32 s_reserved[197]; /* Padding to the end of the block */ 428 }; 429 430 #ifdef __KERNEL__ 431 #define EXT2_SB(sb) (&((sb)->u.ext2_sb)) 432 #else 433 /* Assume that user mode programs are passing in an ext2fs superblock, not 434 * a kernel struct super_block. This will allow us to call the feature-test 435 * macros from user land. */ 436 #define EXT2_SB(sb) (sb) 437 #endif 438 439 /* 440 * Codes for operating systems 441 */ 442 #define EXT2_OS_LINUX 0 443 #define EXT2_OS_HURD 1 444 #define EXT2_OS_MASIX 2 445 #define EXT2_OS_FREEBSD 3 446 #define EXT2_OS_LITES 4 447 #define EXT2_OS_WINNT 5 448 449 /* 450 * Revision levels 451 */ 452 #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ 453 #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 454 455 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV 456 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV 457 458 #define EXT2_GOOD_OLD_INODE_SIZE 128 459 460 /* 461 * Feature set definitions 462 */ 463 464 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ 465 ( EXT2_SB(sb)->s_feature_compat & (mask) ) 466 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ 467 ( EXT2_SB(sb)->s_feature_ro_compat & (mask) ) 468 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ 469 ( EXT2_SB(sb)->s_feature_incompat & (mask) ) 470 471 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 472 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 473 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 474 #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008 475 #define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010 476 #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 477 478 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 479 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 480 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 481 482 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 483 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 484 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 485 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 486 487 #define EXT2_FEATURE_COMPAT_SUPP 0 488 #define EXT2_FEATURE_INCOMPAT_SUPP EXT2_FEATURE_INCOMPAT_FILETYPE 489 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 490 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ 491 EXT2_FEATURE_RO_COMPAT_BTREE_DIR) 492 493 /* 494 * Default values for user and/or group using reserved blocks 495 */ 496 #define EXT2_DEF_RESUID 0 497 #define EXT2_DEF_RESGID 0 498 499 /* 500 * Structure of a directory entry 501 */ 502 #define EXT2_NAME_LEN 255 503 504 struct ext2_dir_entry { 505 __u32 inode; /* Inode number */ 506 __u16 rec_len; /* Directory entry length */ 507 __u16 name_len; /* Name length */ 508 char name[EXT2_NAME_LEN]; /* File name */ 509 }; 510 511 /* 512 * The new version of the directory entry. Since EXT2 structures are 513 * stored in intel byte order, and the name_len field could never be 514 * bigger than 255 chars, it's safe to reclaim the extra byte for the 515 * file_type field. 516 */ 517 struct ext2_dir_entry_2 { 518 __u32 inode; /* Inode number */ 519 __u16 rec_len; /* Directory entry length */ 520 __u8 name_len; /* Name length */ 521 __u8 file_type; 522 char name[EXT2_NAME_LEN]; /* File name */ 523 }; 524 525 /* 526 * Ext2 directory file types. Only the low 3 bits are used. The 527 * other bits are reserved for now. 528 */ 529 #define EXT2_FT_UNKNOWN 0 530 #define EXT2_FT_REG_FILE 1 531 #define EXT2_FT_DIR 2 532 #define EXT2_FT_CHRDEV 3 533 #define EXT2_FT_BLKDEV 4 534 #define EXT2_FT_FIFO 5 535 #define EXT2_FT_SOCK 6 536 #define EXT2_FT_SYMLINK 7 537 538 #define EXT2_FT_MAX 8 539 540 /* 541 * EXT2_DIR_PAD defines the directory entries boundaries 542 * 543 * NOTE: It must be a multiple of 4 544 */ 545 #define EXT2_DIR_PAD 4 546 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) 547 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ 548 ~EXT2_DIR_ROUND) 549 550 #ifdef __KERNEL__ 551 /* 552 * Function prototypes 553 */ 554 555 /* 556 * Ok, these declarations are also in <linux/kernel.h> but none of the 557 * ext2 source programs needs to include it so they are duplicated here. 558 */ 559 # define NORET_TYPE /**/ 560 # define ATTRIB_NORET __attribute__((noreturn)) 561 # define NORET_AND noreturn, 562 563 /* acl.c */ 564 extern int ext2_permission (struct inode *, int); 565 566 /* balloc.c */ 567 extern int ext2_bg_has_super(struct super_block *sb, int group); 568 extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group); 569 extern int ext2_new_block (const struct inode *, unsigned long, 570 __u32 *, __u32 *, int *); 571 extern void ext2_free_blocks (const struct inode *, unsigned long, 572 unsigned long); 573 extern unsigned long ext2_count_free_blocks (struct super_block *); 574 extern void ext2_check_blocks_bitmap (struct super_block *); 575 extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb, 576 unsigned int block_group, 577 struct buffer_head ** bh); 578 579 /* bitmap.c */ 580 extern unsigned long ext2_count_free (struct buffer_head *, unsigned); 581 582 /* dir.c */ 583 extern int ext2_check_dir_entry (const char *, struct inode *, 584 struct ext2_dir_entry_2 *, struct buffer_head *, 585 unsigned long); 586 587 /* file.c */ 588 extern int ext2_read (struct inode *, struct file *, char *, int); 589 extern int ext2_write (struct inode *, struct file *, char *, int); 590 591 /* fsync.c */ 592 extern int ext2_sync_file (struct file *, struct dentry *, int); 593 extern int ext2_fsync_inode (struct inode *, int); 594 595 /* ialloc.c */ 596 extern struct inode * ext2_new_inode (const struct inode *, int); 597 extern void ext2_free_inode (struct inode *); 598 extern unsigned long ext2_count_free_inodes (struct super_block *); 599 extern void ext2_check_inodes_bitmap (struct super_block *); 600 601 /* inode.c */ 602 603 extern struct buffer_head * ext2_getblk (struct inode *, long, int, int *); 604 extern struct buffer_head * ext2_bread (struct inode *, int, int, int *); 605 606 extern void ext2_read_inode (struct inode *); 607 extern void ext2_write_inode (struct inode *, int); 608 extern void ext2_put_inode (struct inode *); 609 extern void ext2_delete_inode (struct inode *); 610 extern int ext2_sync_inode (struct inode *); 611 extern void ext2_discard_prealloc (struct inode *); 612 613 /* ioctl.c */ 614 extern int ext2_ioctl (struct inode *, struct file *, unsigned int, 615 unsigned long); 616 617 /* namei.c */ 618 extern struct inode_operations ext2_dir_inode_operations; 619 620 /* super.c */ 621 extern void ext2_error (struct super_block *, const char *, const char *, ...) 622 __attribute__ ((format (printf, 3, 4))); 623 extern NORET_TYPE void ext2_panic (struct super_block *, const char *, 624 const char *, ...) 625 __attribute__ ((NORET_AND format (printf, 3, 4))); 626 extern void ext2_warning (struct super_block *, const char *, const char *, ...) 627 __attribute__ ((format (printf, 3, 4))); 628 extern void ext2_update_dynamic_rev (struct super_block *sb); 629 extern void ext2_put_super (struct super_block *); 630 extern void ext2_write_super (struct super_block *); 631 extern int ext2_remount (struct super_block *, int *, char *); 632 extern struct super_block * ext2_read_super (struct super_block *,void *,int); 633 extern int ext2_statfs (struct super_block *, struct statfs *); 634 635 /* truncate.c */ 636 extern void ext2_truncate (struct inode *); 637 638 /* 639 * Inodes and files operations 640 */ 641 642 /* dir.c */ 643 extern struct file_operations ext2_dir_operations; 644 645 /* file.c */ 646 extern struct inode_operations ext2_file_inode_operations; 647 extern struct file_operations ext2_file_operations; 648 649 /* symlink.c */ 650 extern struct inode_operations ext2_fast_symlink_inode_operations; 651 652 extern struct address_space_operations ext2_aops; 653 654 #endif /* __KERNEL__ */ 655