ext2_fs.h revision b3f5b4c22939daba86465d05842bce76053bc3cf
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 <ext2fs/ext2_types.h> /* Changed from 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#define EXT2_DEFAULT_PREALLOC_BLOCKS 8 35 36/* 37 * The second extended file system version 38 */ 39#define EXT2FS_DATE "95/08/09" 40#define EXT2FS_VERSION "0.5b" 41 42/* 43 * Special inodes numbers 44 */ 45#define EXT2_BAD_INO 1 /* Bad blocks inode */ 46#define EXT2_ROOT_INO 2 /* Root inode */ 47#define EXT2_ACL_IDX_INO 3 /* ACL inode */ 48#define EXT2_ACL_DATA_INO 4 /* ACL inode */ 49#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ 50#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ 51#define EXT2_RESIZE_INO 7 /* Reserved group descriptors inode */ 52#define EXT2_JOURNAL_INO 8 /* Journal inode */ 53 54/* First non-reserved inode for old ext2 filesystems */ 55#define EXT2_GOOD_OLD_FIRST_INO 11 56 57/* 58 * The second extended file system magic number 59 */ 60#define EXT2_SUPER_MAGIC 0xEF53 61 62/* 63 * Maximal count of links to a file 64 */ 65#define EXT2_LINK_MAX 32000 66 67/* 68 * Macro-instructions used to manage several block sizes 69 */ 70#define EXT2_MIN_BLOCK_SIZE 1024 71#define EXT2_MAX_BLOCK_SIZE 4096 72#define EXT2_MIN_BLOCK_LOG_SIZE 10 73#ifdef __KERNEL__ 74# define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize) 75#else 76# define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) 77#endif 78#define EXT2_ACLE_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_acl_entry)) 79#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32)) 80#ifdef __KERNEL__ 81# define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 82#else 83# define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 84#endif 85#ifdef __KERNEL__ 86#define EXT2_ADDR_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_addr_per_block_bits) 87#define EXT2_INODE_SIZE(s) ((s)->u.ext2_sb.s_inode_size) 88#define EXT2_FIRST_INO(s) ((s)->u.ext2_sb.s_first_ino) 89#else 90#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 91 EXT2_GOOD_OLD_INODE_SIZE : \ 92 (s)->s_inode_size) 93#define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 94 EXT2_GOOD_OLD_FIRST_INO : \ 95 (s)->s_first_ino) 96#endif 97 98/* 99 * Macro-instructions used to manage fragments 100 */ 101#define EXT2_MIN_FRAG_SIZE 1024 102#define EXT2_MAX_FRAG_SIZE 4096 103#define EXT2_MIN_FRAG_LOG_SIZE 10 104#ifdef __KERNEL__ 105# define EXT2_FRAG_SIZE(s) ((s)->u.ext2_sb.s_frag_size) 106# define EXT2_FRAGS_PER_BLOCK(s) ((s)->u.ext2_sb.s_frags_per_block) 107#else 108# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) 109# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) 110#endif 111 112/* 113 * ACL structures 114 */ 115struct ext2_acl_header /* Header of Access Control Lists */ 116{ 117 __u32 aclh_size; 118 __u32 aclh_file_count; 119 __u32 aclh_acle_count; 120 __u32 aclh_first_acle; 121}; 122 123struct ext2_acl_entry /* Access Control List Entry */ 124{ 125 __u32 acle_size; 126 __u16 acle_perms; /* Access permissions */ 127 __u16 acle_type; /* Type of entry */ 128 __u16 acle_tag; /* User or group identity */ 129 __u16 acle_pad1; 130 __u32 acle_next; /* Pointer on next entry for the */ 131 /* same inode or on next free entry */ 132}; 133 134/* 135 * Structure of a blocks group descriptor 136 */ 137struct ext2_group_desc 138{ 139 __u32 bg_block_bitmap; /* Blocks bitmap block */ 140 __u32 bg_inode_bitmap; /* Inodes bitmap block */ 141 __u32 bg_inode_table; /* Inodes table block */ 142 __u16 bg_free_blocks_count; /* Free blocks count */ 143 __u16 bg_free_inodes_count; /* Free inodes count */ 144 __u16 bg_used_dirs_count; /* Directories count */ 145 __u16 bg_pad; 146 __u32 bg_reserved[3]; 147}; 148 149/* 150 * Macro-instructions used to manage group descriptors 151 */ 152#ifdef __KERNEL__ 153# define EXT2_BLOCKS_PER_GROUP(s) ((s)->u.ext2_sb.s_blocks_per_group) 154# define EXT2_DESC_PER_BLOCK(s) ((s)->u.ext2_sb.s_desc_per_block) 155# define EXT2_INODES_PER_GROUP(s) ((s)->u.ext2_sb.s_inodes_per_group) 156# define EXT2_DESC_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_desc_per_block_bits) 157#else 158# define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 159# define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc)) 160# define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 161#endif 162 163/* 164 * Constants relative to the data blocks 165 */ 166#define EXT2_NDIR_BLOCKS 12 167#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 168#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 169#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 170#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 171 172/* 173 * Inode flags 174 */ 175#define EXT2_SECRM_FL 0x00000001 /* Secure deletion */ 176#define EXT2_UNRM_FL 0x00000002 /* Undelete */ 177#define EXT2_COMPR_FL 0x00000004 /* Compress file */ 178#define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */ 179#define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */ 180#define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */ 181#define EXT2_NODUMP_FL 0x00000040 /* do not dump file */ 182#define EXT2_NOATIME_FL 0x00000080 /* do not update atime */ 183/* Reserved for compression usage... */ 184#define EXT2_DIRTY_FL 0x00000100 185#define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 186#define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */ 187#define EXT2_ECOMPR_FL 0x00000800 /* Compression error */ 188/* End compression flags --- maybe not all used */ 189#define EXT2_BTREE_FL 0x00001000 /* btree format dir */ 190#define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */ 191#define EXT2_IMAGIC_FL 0x00002000 192#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 193#define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 194#define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ 195 196#define EXT2_FL_USER_VISIBLE 0x0000DFFF /* User visible flags */ 197#define EXT2_FL_USER_MODIFIABLE 0x000080FF /* User modifiable flags */ 198 199/* 200 * ioctl commands 201 */ 202#define EXT2_IOC_GETFLAGS _IOR('f', 1, long) 203#define EXT2_IOC_SETFLAGS _IOW('f', 2, long) 204#define EXT2_IOC_GETVERSION _IOR('v', 1, long) 205#define EXT2_IOC_SETVERSION _IOW('v', 2, long) 206 207/* 208 * Structure of an inode on the disk 209 */ 210struct ext2_inode { 211 __u16 i_mode; /* File mode */ 212 __u16 i_uid; /* Low 16 bits of Owner Uid */ 213 __u32 i_size; /* Size in bytes */ 214 __u32 i_atime; /* Access time */ 215 __u32 i_ctime; /* Creation time */ 216 __u32 i_mtime; /* Modification time */ 217 __u32 i_dtime; /* Deletion Time */ 218 __u16 i_gid; /* Low 16 bits of Group Id */ 219 __u16 i_links_count; /* Links count */ 220 __u32 i_blocks; /* Blocks count */ 221 __u32 i_flags; /* File flags */ 222 union { 223 struct { 224 __u32 l_i_reserved1; 225 } linux1; 226 struct { 227 __u32 h_i_translator; 228 } hurd1; 229 struct { 230 __u32 m_i_reserved1; 231 } masix1; 232 } osd1; /* OS dependent 1 */ 233 __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ 234 __u32 i_generation; /* File version (for NFS) */ 235 __u32 i_file_acl; /* File ACL */ 236 __u32 i_dir_acl; /* Directory ACL */ 237 __u32 i_faddr; /* Fragment address */ 238 union { 239 struct { 240 __u8 l_i_frag; /* Fragment number */ 241 __u8 l_i_fsize; /* Fragment size */ 242 __u16 i_pad1; 243 __u16 l_i_uid_high; /* these 2 fields */ 244 __u16 l_i_gid_high; /* were reserved2[0] */ 245 __u32 l_i_reserved2; 246 } linux2; 247 struct { 248 __u8 h_i_frag; /* Fragment number */ 249 __u8 h_i_fsize; /* Fragment size */ 250 __u16 h_i_mode_high; 251 __u16 h_i_uid_high; 252 __u16 h_i_gid_high; 253 __u32 h_i_author; 254 } hurd2; 255 struct { 256 __u8 m_i_frag; /* Fragment number */ 257 __u8 m_i_fsize; /* Fragment size */ 258 __u16 m_pad1; 259 __u32 m_i_reserved2[2]; 260 } masix2; 261 } osd2; /* OS dependent 2 */ 262}; 263 264#define i_size_high i_dir_acl 265 266#if defined(__KERNEL__) || defined(__linux__) 267#define i_reserved1 osd1.linux1.l_i_reserved1 268#define i_frag osd2.linux2.l_i_frag 269#define i_fsize osd2.linux2.l_i_fsize 270#define i_uid_low i_uid 271#define i_gid_low i_gid 272#define i_uid_high osd2.linux2.l_i_uid_high 273#define i_gid_high osd2.linux2.l_i_gid_high 274#define i_reserved2 osd2.linux2.l_i_reserved2 275 276#elif defined(__GNU__) 277 278#define i_translator osd1.hurd1.h_i_translator 279#define i_frag osd2.hurd2.h_i_frag; 280#define i_fsize osd2.hurd2.h_i_fsize; 281#define i_uid_high osd2.hurd2.h_i_uid_high 282#define i_gid_high osd2.hurd2.h_i_gid_high 283#define i_author osd2.hurd2.h_i_author 284 285#elif defined(__masix__) 286 287#define i_reserved1 osd1.masix1.m_i_reserved1 288#define i_frag osd2.masix2.m_i_frag 289#define i_fsize osd2.masix2.m_i_fsize 290#define i_reserved2 osd2.masix2.m_i_reserved2 291 292#endif /* defined(__KERNEL) || defined(__linux__) */ 293 294/* 295 * File system states 296 */ 297#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ 298#define EXT2_ERROR_FS 0x0002 /* Errors detected */ 299 300/* 301 * Mount flags 302 */ 303#define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */ 304#define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */ 305#define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */ 306#define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */ 307#define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */ 308#define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */ 309#define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */ 310#define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */ 311 312#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt 313#define set_opt(o, opt) o |= EXT2_MOUNT_##opt 314#define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \ 315 EXT2_MOUNT_##opt) 316/* 317 * Maximal mount counts between two filesystem checks 318 */ 319#define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 320#define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 321 322/* 323 * Behaviour when detecting errors 324 */ 325#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ 326#define EXT2_ERRORS_RO 2 /* Remount fs read-only */ 327#define EXT2_ERRORS_PANIC 3 /* Panic */ 328#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE 329 330/* 331 * Structure of the super block 332 */ 333struct ext2_super_block { 334 __u32 s_inodes_count; /* Inodes count */ 335 __u32 s_blocks_count; /* Blocks count */ 336 __u32 s_r_blocks_count; /* Reserved blocks count */ 337 __u32 s_free_blocks_count; /* Free blocks count */ 338 __u32 s_free_inodes_count; /* Free inodes count */ 339 __u32 s_first_data_block; /* First Data Block */ 340 __u32 s_log_block_size; /* Block size */ 341 __s32 s_log_frag_size; /* Fragment size */ 342 __u32 s_blocks_per_group; /* # Blocks per group */ 343 __u32 s_frags_per_group; /* # Fragments per group */ 344 __u32 s_inodes_per_group; /* # Inodes per group */ 345 __u32 s_mtime; /* Mount time */ 346 __u32 s_wtime; /* Write time */ 347 __u16 s_mnt_count; /* Mount count */ 348 __s16 s_max_mnt_count; /* Maximal mount count */ 349 __u16 s_magic; /* Magic signature */ 350 __u16 s_state; /* File system state */ 351 __u16 s_errors; /* Behaviour when detecting errors */ 352 __u16 s_minor_rev_level; /* minor revision level */ 353 __u32 s_lastcheck; /* time of last check */ 354 __u32 s_checkinterval; /* max. time between checks */ 355 __u32 s_creator_os; /* OS */ 356 __u32 s_rev_level; /* Revision level */ 357 __u16 s_def_resuid; /* Default uid for reserved blocks */ 358 __u16 s_def_resgid; /* Default gid for reserved blocks */ 359 /* 360 * These fields are for EXT2_DYNAMIC_REV superblocks only. 361 * 362 * Note: the difference between the compatible feature set and 363 * the incompatible feature set is that if there is a bit set 364 * in the incompatible feature set that the kernel doesn't 365 * know about, it should refuse to mount the filesystem. 366 * 367 * e2fsck's requirements are more strict; if it doesn't know 368 * about a feature in either the compatible or incompatible 369 * feature set, it must abort and not try to meddle with 370 * things it doesn't understand... 371 */ 372 __u32 s_first_ino; /* First non-reserved inode */ 373 __u16 s_inode_size; /* size of inode structure */ 374 __u16 s_block_group_nr; /* block group # of this superblock */ 375 __u32 s_feature_compat; /* compatible feature set */ 376 __u32 s_feature_incompat; /* incompatible feature set */ 377 __u32 s_feature_ro_compat; /* readonly-compatible feature set */ 378 __u8 s_uuid[16]; /* 128-bit uuid for volume */ 379 char s_volume_name[16]; /* volume name */ 380 char s_last_mounted[64]; /* directory where last mounted */ 381 __u32 s_algorithm_usage_bitmap; /* For compression */ 382 /* 383 * Performance hints. Directory preallocation should only 384 * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on. 385 */ 386 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 387 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 388 __u16 s_padding1; 389 /* 390 * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set. 391 */ 392 __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 393 __u32 s_journal_inum; /* inode number of journal file */ 394 __u32 s_journal_dev; /* device number of journal file */ 395 __u32 s_last_orphan; /* start of list of inodes to delete */ 396 397 __u32 s_reserved[197]; /* Padding to the end of the block */ 398}; 399 400#ifdef __KERNEL__ 401#define EXT2_SB(sb) (&((sb)->u.ext2_sb)) 402#else 403/* Assume that user mode programs are passing in an ext2fs superblock, not 404 * a kernel struct super_block. This will allow us to call the feature-test 405 * macros from user land. */ 406#define EXT2_SB(sb) (sb) 407#endif 408 409/* 410 * Codes for operating systems 411 */ 412#define EXT2_OS_LINUX 0 413#define EXT2_OS_HURD 1 414#define EXT2_OS_MASIX 2 415#define EXT2_OS_FREEBSD 3 416#define EXT2_OS_LITES 4 417 418/* 419 * Revision levels 420 */ 421#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ 422#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 423 424#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV 425#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV 426 427#define EXT2_GOOD_OLD_INODE_SIZE 128 428 429/* 430 * Feature set definitions 431 */ 432 433#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ 434 ( EXT2_SB(sb)->s_feature_compat & (mask) ) 435#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ 436 ( EXT2_SB(sb)->s_feature_ro_compat & (mask) ) 437#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ 438 ( EXT2_SB(sb)->s_feature_incompat & (mask) ) 439 440#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 441#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 442#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 443#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008 444#define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010 445#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 446 447#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 448#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 449#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 450 451#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 452#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 453#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 454#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 455 456#define EXT2_FEATURE_COMPAT_SUPP 0 457#define EXT2_FEATURE_INCOMPAT_SUPP EXT2_FEATURE_INCOMPAT_FILETYPE 458#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 459 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ 460 EXT2_FEATURE_RO_COMPAT_BTREE_DIR) 461 462/* 463 * Default values for user and/or group using reserved blocks 464 */ 465#define EXT2_DEF_RESUID 0 466#define EXT2_DEF_RESGID 0 467 468/* 469 * Structure of a directory entry 470 */ 471#define EXT2_NAME_LEN 255 472 473struct ext2_dir_entry { 474 __u32 inode; /* Inode number */ 475 __u16 rec_len; /* Directory entry length */ 476 __u16 name_len; /* Name length */ 477 char name[EXT2_NAME_LEN]; /* File name */ 478}; 479 480/* 481 * The new version of the directory entry. Since EXT2 structures are 482 * stored in intel byte order, and the name_len field could never be 483 * bigger than 255 chars, it's safe to reclaim the extra byte for the 484 * file_type field. 485 */ 486struct ext2_dir_entry_2 { 487 __u32 inode; /* Inode number */ 488 __u16 rec_len; /* Directory entry length */ 489 __u8 name_len; /* Name length */ 490 __u8 file_type; 491 char name[EXT2_NAME_LEN]; /* File name */ 492}; 493 494/* 495 * Ext2 directory file types. Only the low 3 bits are used. The 496 * other bits are reserved for now. 497 */ 498#define EXT2_FT_UNKNOWN 0 499#define EXT2_FT_REG_FILE 1 500#define EXT2_FT_DIR 2 501#define EXT2_FT_CHRDEV 3 502#define EXT2_FT_BLKDEV 4 503#define EXT2_FT_FIFO 5 504#define EXT2_FT_SOCK 6 505#define EXT2_FT_SYMLINK 7 506 507#define EXT2_FT_MAX 8 508 509/* 510 * EXT2_DIR_PAD defines the directory entries boundaries 511 * 512 * NOTE: It must be a multiple of 4 513 */ 514#define EXT2_DIR_PAD 4 515#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) 516#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ 517 ~EXT2_DIR_ROUND) 518 519#ifdef __KERNEL__ 520/* 521 * Function prototypes 522 */ 523 524/* 525 * Ok, these declarations are also in <linux/kernel.h> but none of the 526 * ext2 source programs needs to include it so they are duplicated here. 527 */ 528# define NORET_TYPE /**/ 529# define ATTRIB_NORET __attribute__((noreturn)) 530# define NORET_AND noreturn, 531 532/* acl.c */ 533extern int ext2_permission (struct inode *, int); 534 535/* balloc.c */ 536extern int ext2_bg_has_super(struct super_block *sb, int group); 537extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group); 538extern int ext2_new_block (const struct inode *, unsigned long, 539 __u32 *, __u32 *, int *); 540extern void ext2_free_blocks (const struct inode *, unsigned long, 541 unsigned long); 542extern unsigned long ext2_count_free_blocks (struct super_block *); 543extern void ext2_check_blocks_bitmap (struct super_block *); 544extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb, 545 unsigned int block_group, 546 struct buffer_head ** bh); 547 548/* bitmap.c */ 549extern unsigned long ext2_count_free (struct buffer_head *, unsigned); 550 551/* dir.c */ 552extern int ext2_check_dir_entry (const char *, struct inode *, 553 struct ext2_dir_entry_2 *, struct buffer_head *, 554 unsigned long); 555 556/* file.c */ 557extern int ext2_read (struct inode *, struct file *, char *, int); 558extern int ext2_write (struct inode *, struct file *, char *, int); 559 560/* fsync.c */ 561extern int ext2_sync_file (struct file *, struct dentry *, int); 562extern int ext2_fsync_inode (struct inode *, int); 563 564/* ialloc.c */ 565extern struct inode * ext2_new_inode (const struct inode *, int); 566extern void ext2_free_inode (struct inode *); 567extern unsigned long ext2_count_free_inodes (struct super_block *); 568extern void ext2_check_inodes_bitmap (struct super_block *); 569 570/* inode.c */ 571 572extern struct buffer_head * ext2_getblk (struct inode *, long, int, int *); 573extern struct buffer_head * ext2_bread (struct inode *, int, int, int *); 574 575extern void ext2_read_inode (struct inode *); 576extern void ext2_write_inode (struct inode *, int); 577extern void ext2_put_inode (struct inode *); 578extern void ext2_delete_inode (struct inode *); 579extern int ext2_sync_inode (struct inode *); 580extern void ext2_discard_prealloc (struct inode *); 581 582/* ioctl.c */ 583extern int ext2_ioctl (struct inode *, struct file *, unsigned int, 584 unsigned long); 585 586/* namei.c */ 587extern struct inode_operations ext2_dir_inode_operations; 588 589/* super.c */ 590extern void ext2_error (struct super_block *, const char *, const char *, ...) 591 __attribute__ ((format (printf, 3, 4))); 592extern NORET_TYPE void ext2_panic (struct super_block *, const char *, 593 const char *, ...) 594 __attribute__ ((NORET_AND format (printf, 3, 4))); 595extern void ext2_warning (struct super_block *, const char *, const char *, ...) 596 __attribute__ ((format (printf, 3, 4))); 597extern void ext2_update_dynamic_rev (struct super_block *sb); 598extern void ext2_put_super (struct super_block *); 599extern void ext2_write_super (struct super_block *); 600extern int ext2_remount (struct super_block *, int *, char *); 601extern struct super_block * ext2_read_super (struct super_block *,void *,int); 602extern int ext2_statfs (struct super_block *, struct statfs *); 603 604/* truncate.c */ 605extern void ext2_truncate (struct inode *); 606 607/* 608 * Inodes and files operations 609 */ 610 611/* dir.c */ 612extern struct file_operations ext2_dir_operations; 613 614/* file.c */ 615extern struct inode_operations ext2_file_inode_operations; 616extern struct file_operations ext2_file_operations; 617 618/* symlink.c */ 619extern struct inode_operations ext2_fast_symlink_inode_operations; 620 621extern struct address_space_operations ext2_aops; 622 623#endif /* __KERNEL__ */ 624 625#endif /* _LINUX_EXT2_FS_H */ 626