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1.1 ! root 1: /* ! 2: * This file has been copied from ! 3: * linux/include/linux/ext2_fs.h ! 4: * ! 5: * Copyright (C) 1992, 1993, 1994, 1995 ! 6: * Remy Card ([email protected]) ! 7: * Laboratoire MASI - Institut Blaise Pascal ! 8: * Universite Pierre et Marie Curie (Paris VI) ! 9: * ! 10: * from ! 11: * ! 12: * linux/include/linux/minix_fs.h ! 13: * ! 14: * Copyright (C) 1991, 1992 Linus Torvalds ! 15: */ ! 16: ! 17: #ifndef _EXT2_FS_H ! 18: #define _EXT2_FS_H ! 19: ! 20: /* from /usr/include/linux/magic.h */ ! 21: ! 22: #define EXT2_SUPER_MAGIC 0xEF53 ! 23: ! 24: /* ! 25: * The second extended filesystem constants/structures ! 26: */ ! 27: ! 28: /* ! 29: * Define EXT2FS_DEBUG to produce debug messages ! 30: */ ! 31: #undef EXT2FS_DEBUG ! 32: ! 33: /* ! 34: * Define EXT2_RESERVATION to reserve data blocks for expanding files ! 35: */ ! 36: #define EXT2_DEFAULT_RESERVE_BLOCKS 8 ! 37: /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ ! 38: #define EXT2_MAX_RESERVE_BLOCKS 1027 ! 39: #define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0 ! 40: /* ! 41: * The second extended file system version ! 42: */ ! 43: #define EXT2FS_DATE "95/08/09" ! 44: #define EXT2FS_VERSION "0.5b" ! 45: ! 46: /* ! 47: * Debug code ! 48: */ ! 49: #ifdef EXT2FS_DEBUG ! 50: # define ext2_debug(f, a...) { \ ! 51: printk ("EXT2-fs DEBUG (%s, %d): %s:", \ ! 52: __FILE__, __LINE__, __FUNCTION__); \ ! 53: printk (f, ## a); \ ! 54: } ! 55: #else ! 56: # define ext2_debug(f, a...) /**/ ! 57: #endif ! 58: ! 59: /* ! 60: * Special inode numbers ! 61: */ ! 62: #define EXT2_BAD_INO 1 /* Bad blocks inode */ ! 63: #define EXT2_ROOT_INO 2 /* Root inode */ ! 64: #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ ! 65: #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ ! 66: ! 67: /* First non-reserved inode for old ext2 filesystems */ ! 68: #define EXT2_GOOD_OLD_FIRST_INO 11 ! 69: ! 70: /* Assume that user mode programs are passing in an ext2fs superblock, not ! 71: * a kernel struct super_block. This will allow us to call the feature-test ! 72: * macros from user land. */ ! 73: #define EXT2_SB(sb) (sb) ! 74: ! 75: /* ! 76: * Maximal count of links to a file ! 77: */ ! 78: #define EXT2_LINK_MAX 32000 ! 79: ! 80: /* ! 81: * Macro-instructions used to manage several block sizes ! 82: */ ! 83: #define EXT2_MIN_BLOCK_SIZE 1024 ! 84: #define EXT2_MAX_BLOCK_SIZE 4096 ! 85: #define EXT2_MIN_BLOCK_LOG_SIZE 10 ! 86: # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) ! 87: #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (uint32_t)) ! 88: # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) ! 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: ! 96: /* ! 97: * Macro-instructions used to manage fragments ! 98: */ ! 99: #define EXT2_MIN_FRAG_SIZE 1024 ! 100: #define EXT2_MAX_FRAG_SIZE 4096 ! 101: #define EXT2_MIN_FRAG_LOG_SIZE 10 ! 102: # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) ! 103: # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) ! 104: ! 105: /* ! 106: * Structure of a blocks group descriptor ! 107: */ ! 108: struct ext2_group_desc ! 109: { ! 110: uint32_t bg_block_bitmap; /* Blocks bitmap block */ ! 111: uint32_t bg_inode_bitmap; /* Inodes bitmap block */ ! 112: uint32_t bg_inode_table; /* Inodes table block */ ! 113: uint16_t bg_free_blocks_count; /* Free blocks count */ ! 114: uint16_t bg_free_inodes_count; /* Free inodes count */ ! 115: uint16_t bg_used_dirs_count; /* Directories count */ ! 116: uint16_t bg_pad; ! 117: uint32_t bg_reserved[3]; ! 118: }; ! 119: ! 120: /* ! 121: * Macro-instructions used to manage group descriptors ! 122: */ ! 123: # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) ! 124: # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc)) ! 125: # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) ! 126: ! 127: /* ! 128: * Constants relative to the data blocks ! 129: */ ! 130: #define EXT2_NDIR_BLOCKS 12 ! 131: #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS ! 132: #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) ! 133: #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) ! 134: #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) ! 135: ! 136: /* ! 137: * Inode flags (GETFLAGS/SETFLAGS) ! 138: */ ! 139: #define EXT2_SECRM_FL FS_SECRM_FL /* Secure deletion */ ! 140: #define EXT2_UNRM_FL FS_UNRM_FL /* Undelete */ ! 141: #define EXT2_COMPR_FL FS_COMPR_FL /* Compress file */ ! 142: #define EXT2_SYNC_FL FS_SYNC_FL /* Synchronous updates */ ! 143: #define EXT2_IMMUTABLE_FL FS_IMMUTABLE_FL /* Immutable file */ ! 144: #define EXT2_APPEND_FL FS_APPEND_FL /* writes to file may only append */ ! 145: #define EXT2_NODUMP_FL FS_NODUMP_FL /* do not dump file */ ! 146: #define EXT2_NOATIME_FL FS_NOATIME_FL /* do not update atime */ ! 147: /* Reserved for compression usage... */ ! 148: #define EXT2_DIRTY_FL FS_DIRTY_FL ! 149: #define EXT2_COMPRBLK_FL FS_COMPRBLK_FL /* One or more compressed clusters */ ! 150: #define EXT2_NOCOMP_FL FS_NOCOMP_FL /* Don't compress */ ! 151: #define EXT2_ECOMPR_FL FS_ECOMPR_FL /* Compression error */ ! 152: /* End compression flags --- maybe not all used */ ! 153: #define EXT2_BTREE_FL FS_BTREE_FL /* btree format dir */ ! 154: #define EXT2_INDEX_FL FS_INDEX_FL /* hash-indexed directory */ ! 155: #define EXT2_IMAGIC_FL FS_IMAGIC_FL /* AFS directory */ ! 156: #define EXT2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL /* Reserved for ext3 */ ! 157: #define EXT2_NOTAIL_FL FS_NOTAIL_FL /* file tail should not be merged */ ! 158: #define EXT2_DIRSYNC_FL FS_DIRSYNC_FL /* dirsync behaviour (directories only) */ ! 159: #define EXT2_TOPDIR_FL FS_TOPDIR_FL /* Top of directory hierarchies*/ ! 160: #define EXT2_RESERVED_FL FS_RESERVED_FL /* reserved for ext2 lib */ ! 161: ! 162: #define EXT2_FL_USER_VISIBLE FS_FL_USER_VISIBLE /* User visible flags */ ! 163: #define EXT2_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE /* User modifiable flags */ ! 164: ! 165: /* ! 166: * ioctl commands ! 167: */ ! 168: #define EXT2_IOC_GETFLAGS FS_IOC_GETFLAGS ! 169: #define EXT2_IOC_SETFLAGS FS_IOC_SETFLAGS ! 170: #define EXT2_IOC_GETVERSION FS_IOC_GETVERSION ! 171: #define EXT2_IOC_SETVERSION FS_IOC_SETVERSION ! 172: #define EXT2_IOC_GETRSVSZ _IOR('f', 5, long) ! 173: #define EXT2_IOC_SETRSVSZ _IOW('f', 6, long) ! 174: ! 175: /* ! 176: * ioctl commands in 32 bit emulation ! 177: */ ! 178: #define EXT2_IOC32_GETFLAGS FS_IOC32_GETFLAGS ! 179: #define EXT2_IOC32_SETFLAGS FS_IOC32_SETFLAGS ! 180: #define EXT2_IOC32_GETVERSION FS_IOC32_GETVERSION ! 181: #define EXT2_IOC32_SETVERSION FS_IOC32_SETVERSION ! 182: ! 183: /* ! 184: * Structure of an inode on the disk ! 185: */ ! 186: struct ext2_inode { ! 187: uint16_t i_mode; /* File mode */ ! 188: uint16_t i_uid; /* Low 16 bits of Owner Uid */ ! 189: uint32_t i_size; /* Size in bytes */ ! 190: uint32_t i_atime; /* Access time */ ! 191: uint32_t i_ctime; /* Creation time */ ! 192: uint32_t i_mtime; /* Modification time */ ! 193: uint32_t i_dtime; /* Deletion Time */ ! 194: uint16_t i_gid; /* Low 16 bits of Group Id */ ! 195: uint16_t i_links_count; /* Links count */ ! 196: uint32_t i_blocks; /* Blocks count */ ! 197: uint32_t i_flags; /* File flags */ ! 198: union { ! 199: struct { ! 200: uint32_t l_i_reserved1; ! 201: } linux1; ! 202: struct { ! 203: uint32_t h_i_translator; ! 204: } hurd1; ! 205: struct { ! 206: uint32_t m_i_reserved1; ! 207: } masix1; ! 208: } osd1; /* OS dependent 1 */ ! 209: uint32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ ! 210: uint32_t i_generation; /* File version (for NFS) */ ! 211: uint32_t i_file_acl; /* File ACL */ ! 212: uint32_t i_dir_acl; /* Directory ACL */ ! 213: uint32_t i_faddr; /* Fragment address */ ! 214: union { ! 215: struct { ! 216: uint8_t l_i_frag; /* Fragment number */ ! 217: uint8_t l_i_fsize; /* Fragment size */ ! 218: uint16_t i_pad1; ! 219: uint16_t l_i_uid_high; /* these 2 fields */ ! 220: uint16_t l_i_gid_high; /* were reserved2[0] */ ! 221: uint32_t l_i_reserved2; ! 222: } linux2; ! 223: struct { ! 224: uint8_t h_i_frag; /* Fragment number */ ! 225: uint8_t h_i_fsize; /* Fragment size */ ! 226: uint16_t h_i_mode_high; ! 227: uint16_t h_i_uid_high; ! 228: uint16_t h_i_gid_high; ! 229: uint32_t h_i_author; ! 230: } hurd2; ! 231: struct { ! 232: uint8_t m_i_frag; /* Fragment number */ ! 233: uint8_t m_i_fsize; /* Fragment size */ ! 234: uint16_t m_pad1; ! 235: uint32_t m_i_reserved2[2]; ! 236: } masix2; ! 237: } osd2; /* OS dependent 2 */ ! 238: }; ! 239: ! 240: #define i_size_high i_dir_acl ! 241: ! 242: #if defined(__KERNEL__) || defined(__linux__) ! 243: #define i_reserved1 osd1.linux1.l_i_reserved1 ! 244: #define i_frag osd2.linux2.l_i_frag ! 245: #define i_fsize osd2.linux2.l_i_fsize ! 246: #define i_uid_low i_uid ! 247: #define i_gid_low i_gid ! 248: #define i_uid_high osd2.linux2.l_i_uid_high ! 249: #define i_gid_high osd2.linux2.l_i_gid_high ! 250: #define i_reserved2 osd2.linux2.l_i_reserved2 ! 251: #endif ! 252: ! 253: #ifdef __hurd__ ! 254: #define i_translator osd1.hurd1.h_i_translator ! 255: #define i_frag osd2.hurd2.h_i_frag; ! 256: #define i_fsize osd2.hurd2.h_i_fsize; ! 257: #define i_uid_high osd2.hurd2.h_i_uid_high ! 258: #define i_gid_high osd2.hurd2.h_i_gid_high ! 259: #define i_author osd2.hurd2.h_i_author ! 260: #endif ! 261: ! 262: #ifdef __masix__ ! 263: #define i_reserved1 osd1.masix1.m_i_reserved1 ! 264: #define i_frag osd2.masix2.m_i_frag ! 265: #define i_fsize osd2.masix2.m_i_fsize ! 266: #define i_reserved2 osd2.masix2.m_i_reserved2 ! 267: #endif ! 268: ! 269: /* ! 270: * File system states ! 271: */ ! 272: #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ ! 273: #define EXT2_ERROR_FS 0x0002 /* Errors detected */ ! 274: ! 275: /* ! 276: * Mount flags ! 277: */ ! 278: #define EXT2_MOUNT_CHECK 0x000001 /* Do mount-time checks */ ! 279: #define EXT2_MOUNT_OLDALLOC 0x000002 /* Don't use the new Orlov allocator */ ! 280: #define EXT2_MOUNT_GRPID 0x000004 /* Create files with directory's group */ ! 281: #define EXT2_MOUNT_DEBUG 0x000008 /* Some debugging messages */ ! 282: #define EXT2_MOUNT_ERRORS_CONT 0x000010 /* Continue on errors */ ! 283: #define EXT2_MOUNT_ERRORS_RO 0x000020 /* Remount fs ro on errors */ ! 284: #define EXT2_MOUNT_ERRORS_PANIC 0x000040 /* Panic on errors */ ! 285: #define EXT2_MOUNT_MINIX_DF 0x000080 /* Mimics the Minix statfs */ ! 286: #define EXT2_MOUNT_NOBH 0x000100 /* No buffer_heads */ ! 287: #define EXT2_MOUNT_NO_UID32 0x000200 /* Disable 32-bit UIDs */ ! 288: #define EXT2_MOUNT_XATTR_USER 0x004000 /* Extended user attributes */ ! 289: #define EXT2_MOUNT_POSIX_ACL 0x008000 /* POSIX Access Control Lists */ ! 290: #define EXT2_MOUNT_XIP 0x010000 /* Execute in place */ ! 291: #define EXT2_MOUNT_USRQUOTA 0x020000 /* user quota */ ! 292: #define EXT2_MOUNT_GRPQUOTA 0x040000 /* group quota */ ! 293: #define EXT2_MOUNT_RESERVATION 0x080000 /* Preallocation */ ! 294: ! 295: ! 296: #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt ! 297: #define set_opt(o, opt) o |= EXT2_MOUNT_##opt ! 298: #define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \ ! 299: EXT2_MOUNT_##opt) ! 300: /* ! 301: * Maximal mount counts between two filesystem checks ! 302: */ ! 303: #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ ! 304: #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ ! 305: ! 306: /* ! 307: * Behaviour when detecting errors ! 308: */ ! 309: #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ ! 310: #define EXT2_ERRORS_RO 2 /* Remount fs read-only */ ! 311: #define EXT2_ERRORS_PANIC 3 /* Panic */ ! 312: #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE ! 313: ! 314: /* ! 315: * Structure of the super block ! 316: */ ! 317: struct ext2_super_block { ! 318: uint32_t s_inodes_count; /* Inodes count */ ! 319: uint32_t s_blocks_count; /* Blocks count */ ! 320: uint32_t s_r_blocks_count; /* Reserved blocks count */ ! 321: uint32_t s_free_blocks_count; /* Free blocks count */ ! 322: uint32_t s_free_inodes_count; /* Free inodes count */ ! 323: uint32_t s_first_data_block; /* First Data Block */ ! 324: uint32_t s_log_block_size; /* Block size */ ! 325: uint32_t s_log_frag_size; /* Fragment size */ ! 326: uint32_t s_blocks_per_group; /* # Blocks per group */ ! 327: uint32_t s_frags_per_group; /* # Fragments per group */ ! 328: uint32_t s_inodes_per_group; /* # Inodes per group */ ! 329: uint32_t s_mtime; /* Mount time */ ! 330: uint32_t s_wtime; /* Write time */ ! 331: uint16_t s_mnt_count; /* Mount count */ ! 332: uint16_t s_max_mnt_count; /* Maximal mount count */ ! 333: uint16_t s_magic; /* Magic signature */ ! 334: uint16_t s_state; /* File system state */ ! 335: uint16_t s_errors; /* Behaviour when detecting errors */ ! 336: uint16_t s_minor_rev_level; /* minor revision level */ ! 337: uint32_t s_lastcheck; /* time of last check */ ! 338: uint32_t s_checkinterval; /* max. time between checks */ ! 339: uint32_t s_creator_os; /* OS */ ! 340: uint32_t s_rev_level; /* Revision level */ ! 341: uint16_t s_def_resuid; /* Default uid for reserved blocks */ ! 342: uint16_t s_def_resgid; /* Default gid for reserved blocks */ ! 343: /* ! 344: * These fields are for EXT2_DYNAMIC_REV superblocks only. ! 345: * ! 346: * Note: the difference between the compatible feature set and ! 347: * the incompatible feature set is that if there is a bit set ! 348: * in the incompatible feature set that the kernel doesn't ! 349: * know about, it should refuse to mount the filesystem. ! 350: * ! 351: * e2fsck's requirements are more strict; if it doesn't know ! 352: * about a feature in either the compatible or incompatible ! 353: * feature set, it must abort and not try to meddle with ! 354: * things it doesn't understand... ! 355: */ ! 356: uint32_t s_first_ino; /* First non-reserved inode */ ! 357: uint16_t s_inode_size; /* size of inode structure */ ! 358: uint16_t s_block_group_nr; /* block group # of this superblock */ ! 359: uint32_t s_feature_compat; /* compatible feature set */ ! 360: uint32_t s_feature_incompat; /* incompatible feature set */ ! 361: uint32_t s_feature_ro_compat; /* readonly-compatible feature set */ ! 362: uint8_t s_uuid[16]; /* 128-bit uuid for volume */ ! 363: char s_volume_name[16]; /* volume name */ ! 364: char s_last_mounted[64]; /* directory where last mounted */ ! 365: uint32_t s_algorithm_usage_bitmap; /* For compression */ ! 366: /* ! 367: * Performance hints. Directory preallocation should only ! 368: * happen if the EXT2_COMPAT_PREALLOC flag is on. ! 369: */ ! 370: uint8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ ! 371: uint8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ ! 372: uint16_t s_padding1; ! 373: /* ! 374: * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. ! 375: */ ! 376: uint8_t s_journal_uuid[16]; /* uuid of journal superblock */ ! 377: uint32_t s_journal_inum; /* inode number of journal file */ ! 378: uint32_t s_journal_dev; /* device number of journal file */ ! 379: uint32_t s_last_orphan; /* start of list of inodes to delete */ ! 380: uint32_t s_hash_seed[4]; /* HTREE hash seed */ ! 381: uint8_t s_def_hash_version; /* Default hash version to use */ ! 382: uint8_t s_reserved_char_pad; ! 383: uint16_t s_reserved_word_pad; ! 384: uint32_t s_default_mount_opts; ! 385: uint32_t s_first_meta_bg; /* First metablock block group */ ! 386: uint32_t s_reserved[190]; /* Padding to the end of the block */ ! 387: }; ! 388: ! 389: /* ! 390: * Codes for operating systems ! 391: */ ! 392: #define EXT2_OS_LINUX 0 ! 393: #define EXT2_OS_HURD 1 ! 394: #define EXT2_OS_MASIX 2 ! 395: #define EXT2_OS_FREEBSD 3 ! 396: #define EXT2_OS_LITES 4 ! 397: ! 398: /* ! 399: * Revision levels ! 400: */ ! 401: #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ ! 402: #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ ! 403: ! 404: #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV ! 405: #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV ! 406: ! 407: #define EXT2_GOOD_OLD_INODE_SIZE 128 ! 408: ! 409: /* ! 410: * Feature set definitions ! 411: */ ! 412: ! 413: #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ ! 414: ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) ! 415: #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ ! 416: ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) ! 417: #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ ! 418: ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) ! 419: #define EXT2_SET_COMPAT_FEATURE(sb,mask) \ ! 420: EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) ! 421: #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \ ! 422: EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) ! 423: #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \ ! 424: EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) ! 425: #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \ ! 426: EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) ! 427: #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ ! 428: EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) ! 429: #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \ ! 430: EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) ! 431: ! 432: #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 ! 433: #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 ! 434: #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 ! 435: #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008 ! 436: #define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010 ! 437: #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 ! 438: #define EXT2_FEATURE_COMPAT_ANY 0xffffffff ! 439: ! 440: #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 ! 441: #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 ! 442: #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 ! 443: #define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff ! 444: ! 445: #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 ! 446: #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 ! 447: #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 ! 448: #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 ! 449: #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010 ! 450: #define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff ! 451: ! 452: #define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR ! 453: #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \ ! 454: EXT2_FEATURE_INCOMPAT_META_BG) ! 455: #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ ! 456: EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ ! 457: EXT2_FEATURE_RO_COMPAT_BTREE_DIR) ! 458: #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP ! 459: #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP ! 460: ! 461: /* ! 462: * Default values for user and/or group using reserved blocks ! 463: */ ! 464: #define EXT2_DEF_RESUID 0 ! 465: #define EXT2_DEF_RESGID 0 ! 466: ! 467: /* ! 468: * Default mount options ! 469: */ ! 470: #define EXT2_DEFM_DEBUG 0x0001 ! 471: #define EXT2_DEFM_BSDGROUPS 0x0002 ! 472: #define EXT2_DEFM_XATTR_USER 0x0004 ! 473: #define EXT2_DEFM_ACL 0x0008 ! 474: #define EXT2_DEFM_UID16 0x0010 ! 475: /* Not used by ext2, but reserved for use by ext3 */ ! 476: #define EXT3_DEFM_JMODE 0x0060 ! 477: #define EXT3_DEFM_JMODE_DATA 0x0020 ! 478: #define EXT3_DEFM_JMODE_ORDERED 0x0040 ! 479: #define EXT3_DEFM_JMODE_WBACK 0x0060 ! 480: ! 481: /* ! 482: * Structure of a directory entry ! 483: */ ! 484: #define EXT2_NAME_LEN 255 ! 485: ! 486: struct ext2_dir_entry { ! 487: uint32_t inode; /* Inode number */ ! 488: uint16_t rec_len; /* Directory entry length */ ! 489: uint16_t name_len; /* Name length */ ! 490: char name[EXT2_NAME_LEN]; /* File name */ ! 491: }; ! 492: ! 493: /* ! 494: * The new version of the directory entry. Since EXT2 structures are ! 495: * stored in intel byte order, and the name_len field could never be ! 496: * bigger than 255 chars, it's safe to reclaim the extra byte for the ! 497: * file_type field. ! 498: */ ! 499: struct ext2_dir_entry_2 { ! 500: uint32_t inode; /* Inode number */ ! 501: uint16_t rec_len; /* Directory entry length */ ! 502: uint8_t name_len; /* Name length */ ! 503: uint8_t file_type; ! 504: char name[EXT2_NAME_LEN]; /* File name */ ! 505: }; ! 506: ! 507: /* ! 508: * Ext2 directory file types. Only the low 3 bits are used. The ! 509: * other bits are reserved for now. ! 510: */ ! 511: enum { ! 512: EXT2_FT_UNKNOWN, ! 513: EXT2_FT_REG_FILE, ! 514: EXT2_FT_DIR, ! 515: EXT2_FT_CHRDEV, ! 516: EXT2_FT_BLKDEV, ! 517: EXT2_FT_FIFO, ! 518: EXT2_FT_SOCK, ! 519: EXT2_FT_SYMLINK, ! 520: EXT2_FT_MAX ! 521: }; ! 522: ! 523: /* ! 524: * EXT2_DIR_PAD defines the directory entries boundaries ! 525: * ! 526: * NOTE: It must be a multiple of 4 ! 527: */ ! 528: #define EXT2_DIR_PAD 4 ! 529: #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) ! 530: #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ ! 531: ~EXT2_DIR_ROUND) ! 532: #define EXT2_MAX_REC_LEN ((1<<16)-1) ! 533: ! 534: #endif /* _EXT2_FS_H */
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