3 * Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 * linux/include/linux/ext3_fs.h
27 * Copyright (C) 1992, 1993, 1994, 1995
28 * Remy Card (card@masi.ibp.fr)
29 * Laboratoire MASI - Institut Blaise Pascal
30 * Universite Pierre et Marie Curie (Paris VI)
34 * linux/include/linux/minix_fs.h
36 * Copyright (C) 1991, 1992 Linus Torvalds
39 #ifndef _LINUX_EXT3_FS_H
40 #define _LINUX_EXT3_FS_H
42 //#include <linux/types.h>
45 * The second extended filesystem constants/structures
49 * Define EXT3FS_DEBUG to produce debug messages
54 * Define EXT3_PREALLOCATE to preallocate data blocks for expanding files
56 #undef EXT3_PREALLOCATE /* @@@ Fix this! */
57 #define EXT3_DEFAULT_PREALLOC_BLOCKS 8
60 * The second extended file system version
62 #define EXT3FS_DATE "10 Jan 2002"
63 #define EXT3FS_VERSION "2.4-0.9.17"
69 #define ext3_debug(f, a...) \
71 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
72 __FILE__, __LINE__, __FUNCTION__); \
73 printk (KERN_DEBUG f, ## a); \
76 #define ext3_debug(f, a...) do {} while (0)
80 * Special inodes numbers
82 #define EXT3_BAD_INO 1 /* Bad blocks inode */
83 #define EXT3_ROOT_INO 2 /* Root inode */
84 #define EXT3_ACL_IDX_INO 3 /* ACL inode */
85 #define EXT3_ACL_DATA_INO 4 /* ACL inode */
86 #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
87 #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
88 #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
89 #define EXT3_JOURNAL_INO 8 /* Journal inode */
91 /* First non-reserved inode for old ext3 filesystems */
92 #define EXT3_GOOD_OLD_FIRST_INO 11
95 * The second extended file system magic number
97 #define EXT3_SUPER_MAGIC 0xEF53
100 * Maximal count of links to a file
102 #define EXT3_LINK_MAX 32000
105 * Macro-instructions used to manage several block sizes
107 #define EXT3_MIN_BLOCK_SIZE 1024
108 #define EXT3_MAX_BLOCK_SIZE 4096
109 #define EXT3_MIN_BLOCK_LOG_SIZE 10
111 # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
113 # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
115 #define EXT3_ACLE_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_acl_entry))
116 #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
118 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
120 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
123 #define EXT3_ADDR_PER_BLOCK_BITS(s) ((s)->u.ext3_sb.s_addr_per_block_bits)
124 #define EXT3_INODE_SIZE(s) ((s)->u.ext3_sb.s_inode_size)
125 #define EXT3_FIRST_INO(s) ((s)->u.ext3_sb.s_first_ino)
127 #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
128 EXT3_GOOD_OLD_INODE_SIZE : \
130 #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
131 EXT3_GOOD_OLD_FIRST_INO : \
136 * Macro-instructions used to manage fragments
138 #define EXT3_MIN_FRAG_SIZE 1024
139 #define EXT3_MAX_FRAG_SIZE 4096
140 #define EXT3_MIN_FRAG_LOG_SIZE 10
142 # define EXT3_FRAG_SIZE(s) ((s)->u.ext3_sb.s_frag_size)
143 # define EXT3_FRAGS_PER_BLOCK(s) ((s)->u.ext3_sb.s_frags_per_block)
145 # define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
146 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
152 struct ext3_acl_header
/* Header of Access Control Lists */
155 __u32 aclh_file_count
;
156 __u32 aclh_acle_count
;
157 __u32 aclh_first_acle
;
160 struct ext3_acl_entry
/* Access Control List Entry */
163 __u16 acle_perms
; /* Access permissions */
164 __u16 acle_type
; /* Type of entry */
165 __u16 acle_tag
; /* User or group identity */
167 __u32 acle_next
; /* Pointer on next entry for the */
168 /* same inode or on next free entry */
172 * Structure of a blocks group descriptor
174 struct ext3_group_desc
176 __u32 bg_block_bitmap
; /* Blocks bitmap block */
177 __u32 bg_inode_bitmap
; /* Inodes bitmap block */
178 __u32 bg_inode_table
; /* Inodes table block */
179 __u16 bg_free_blocks_count
; /* Free blocks count */
180 __u16 bg_free_inodes_count
; /* Free inodes count */
181 __u16 bg_used_dirs_count
; /* Directories count */
183 __u32 bg_reserved
[3];
187 * Macro-instructions used to manage group descriptors
190 # define EXT3_BLOCKS_PER_GROUP(s) ((s)->u.ext3_sb.s_blocks_per_group)
191 # define EXT3_DESC_PER_BLOCK(s) ((s)->u.ext3_sb.s_desc_per_block)
192 # define EXT3_INODES_PER_GROUP(s) ((s)->u.ext3_sb.s_inodes_per_group)
193 # define EXT3_DESC_PER_BLOCK_BITS(s) ((s)->u.ext3_sb.s_desc_per_block_bits)
195 # define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
196 # define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
197 # define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
201 * Constants relative to the data blocks
203 #define EXT3_NDIR_BLOCKS 12
204 #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
205 #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
206 #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
207 #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
212 #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
213 #define EXT3_UNRM_FL 0x00000002 /* Undelete */
214 #define EXT3_COMPR_FL 0x00000004 /* Compress file */
215 #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
216 #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
217 #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
218 #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
219 #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
220 /* Reserved for compression usage... */
221 #define EXT3_DIRTY_FL 0x00000100
222 #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
223 #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
224 #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
225 /* End compression flags --- maybe not all used */
226 #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
227 #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
228 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
229 #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
231 #define EXT3_FL_USER_VISIBLE 0x00005FFF /* User visible flags */
232 #define EXT3_FL_USER_MODIFIABLE 0x000000FF /* User modifiable flags */
235 * Inode dynamic state flags
237 #define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
238 #define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
243 #define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
244 #define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
245 #define EXT3_IOC_GETVERSION _IOR('f', 3, long)
246 #define EXT3_IOC_SETVERSION _IOW('f', 4, long)
247 #define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
248 #define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
249 #ifdef CONFIG_JBD_DEBUG
250 #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
254 * Structure of an inode on the disk
257 __u16 i_mode
; /* File mode */
258 __u16 i_uid
; /* Low 16 bits of Owner Uid */
259 __u32 i_size
; /* Size in bytes */
260 __u32 i_atime
; /* Access time */
261 __u32 i_ctime
; /* Creation time */
262 __u32 i_mtime
; /* Modification time */
263 __u32 i_dtime
; /* Deletion Time */
264 __u16 i_gid
; /* Low 16 bits of Group Id */
265 __u16 i_links_count
; /* Links count */
266 __u32 i_blocks
; /* Blocks count */
267 __u32 i_flags
; /* File flags */
273 __u32 h_i_translator
;
278 } osd1
; /* OS dependent 1 */
279 __u32 i_block
[EXT3_N_BLOCKS
];/* Pointers to blocks */
280 __u32 i_generation
; /* File version (for NFS) */
281 __u32 i_file_acl
; /* File ACL */
282 __u32 i_dir_acl
; /* Directory ACL */
283 __u32 i_faddr
; /* Fragment address */
286 __u8 l_i_frag
; /* Fragment number */
287 __u8 l_i_fsize
; /* Fragment size */
289 __u16 l_i_uid_high
; /* these 2 fields */
290 __u16 l_i_gid_high
; /* were reserved2[0] */
294 __u8 h_i_frag
; /* Fragment number */
295 __u8 h_i_fsize
; /* Fragment size */
302 __u8 m_i_frag
; /* Fragment number */
303 __u8 m_i_fsize
; /* Fragment size */
305 __u32 m_i_reserved2
[2];
307 } osd2
; /* OS dependent 2 */
310 #define i_size_high i_dir_acl
312 #if defined(__KERNEL__) || defined(__linux__)
313 #define i_reserved1 osd1.linux1.l_i_reserved1
314 #define i_frag osd2.linux2.l_i_frag
315 #define i_fsize osd2.linux2.l_i_fsize
316 #define i_uid_low i_uid
317 #define i_gid_low i_gid
318 #define i_uid_high osd2.linux2.l_i_uid_high
319 #define i_gid_high osd2.linux2.l_i_gid_high
320 #define i_reserved2 osd2.linux2.l_i_reserved2
322 #elif defined(__GNU__)
324 #define i_translator osd1.hurd1.h_i_translator
325 #define i_frag osd2.hurd2.h_i_frag;
326 #define i_fsize osd2.hurd2.h_i_fsize;
327 #define i_uid_high osd2.hurd2.h_i_uid_high
328 #define i_gid_high osd2.hurd2.h_i_gid_high
329 #define i_author osd2.hurd2.h_i_author
331 #elif defined(__masix__)
333 #define i_reserved1 osd1.masix1.m_i_reserved1
334 #define i_frag osd2.masix2.m_i_frag
335 #define i_fsize osd2.masix2.m_i_fsize
336 #define i_reserved2 osd2.masix2.m_i_reserved2
338 #endif /* defined(__KERNEL__) || defined(__linux__) */
343 #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
344 #define EXT3_ERROR_FS 0x0002 /* Errors detected */
345 #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
350 #define EXT3_MOUNT_CHECK 0x0001 /* Do mount-time checks */
351 #define EXT3_MOUNT_GRPID 0x0004 /* Create files with directory's group */
352 #define EXT3_MOUNT_DEBUG 0x0008 /* Some debugging messages */
353 #define EXT3_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
354 #define EXT3_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
355 #define EXT3_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
356 #define EXT3_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
357 #define EXT3_MOUNT_NOLOAD 0x0100 /* Don't use existing journal*/
358 #define EXT3_MOUNT_ABORT 0x0200 /* Fatal error detected */
359 #define EXT3_MOUNT_DATA_FLAGS 0x0C00 /* Mode for data writes: */
360 #define EXT3_MOUNT_JOURNAL_DATA 0x0400 /* Write data to journal */
361 #define EXT3_MOUNT_ORDERED_DATA 0x0800 /* Flush data before commit */
362 #define EXT3_MOUNT_WRITEBACK_DATA 0x0C00 /* No data ordering */
363 #define EXT3_MOUNT_UPDATE_JOURNAL 0x1000 /* Update the journal format */
364 #define EXT3_MOUNT_NO_UID32 0x2000 /* Disable 32-bit UIDs */
366 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
367 #ifndef _LINUX_EXT2_FS_H
368 #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
369 #define set_opt(o, opt) o |= EXT3_MOUNT_##opt
370 #define test_opt(sb, opt) ((sb)->u.ext3_sb.s_mount_opt & \
373 #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
374 #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
377 #define ext3_set_bit ext2_set_bit
378 #define ext3_clear_bit ext2_clear_bit
379 #define ext3_test_bit ext2_test_bit
380 #define ext3_find_first_zero_bit ext2_find_first_zero_bit
381 #define ext3_find_next_zero_bit ext2_find_next_zero_bit
384 * Maximal mount counts between two filesystem checks
386 #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
387 #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
390 * Behaviour when detecting errors
392 #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
393 #define EXT3_ERRORS_RO 2 /* Remount fs read-only */
394 #define EXT3_ERRORS_PANIC 3 /* Panic */
395 #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
398 * Structure of the super block
400 struct ext3_super_block
{
401 /*00*/ __u32 s_inodes_count
; /* Inodes count */
402 __u32 s_blocks_count
; /* Blocks count */
403 __u32 s_r_blocks_count
; /* Reserved blocks count */
404 __u32 s_free_blocks_count
; /* Free blocks count */
405 /*10*/ __u32 s_free_inodes_count
; /* Free inodes count */
406 __u32 s_first_data_block
; /* First Data Block */
407 __u32 s_log_block_size
; /* Block size */
408 __s32 s_log_frag_size
; /* Fragment size */
409 /*20*/ __u32 s_blocks_per_group
; /* # Blocks per group */
410 __u32 s_frags_per_group
; /* # Fragments per group */
411 __u32 s_inodes_per_group
; /* # Inodes per group */
412 __u32 s_mtime
; /* Mount time */
413 /*30*/ __u32 s_wtime
; /* Write time */
414 __u16 s_mnt_count
; /* Mount count */
415 __s16 s_max_mnt_count
; /* Maximal mount count */
416 __u16 s_magic
; /* Magic signature */
417 __u16 s_state
; /* File system state */
418 __u16 s_errors
; /* Behaviour when detecting errors */
419 __u16 s_minor_rev_level
; /* minor revision level */
420 /*40*/ __u32 s_lastcheck
; /* time of last check */
421 __u32 s_checkinterval
; /* max. time between checks */
422 __u32 s_creator_os
; /* OS */
423 __u32 s_rev_level
; /* Revision level */
424 /*50*/ __u16 s_def_resuid
; /* Default uid for reserved blocks */
425 __u16 s_def_resgid
; /* Default gid for reserved blocks */
427 * These fields are for EXT3_DYNAMIC_REV superblocks only.
429 * Note: the difference between the compatible feature set and
430 * the incompatible feature set is that if there is a bit set
431 * in the incompatible feature set that the kernel doesn't
432 * know about, it should refuse to mount the filesystem.
434 * e2fsck's requirements are more strict; if it doesn't know
435 * about a feature in either the compatible or incompatible
436 * feature set, it must abort and not try to meddle with
437 * things it doesn't understand...
439 __u32 s_first_ino
; /* First non-reserved inode */
440 __u16 s_inode_size
; /* size of inode structure */
441 __u16 s_block_group_nr
; /* block group # of this superblock */
442 __u32 s_feature_compat
; /* compatible feature set */
443 /*60*/ __u32 s_feature_incompat
; /* incompatible feature set */
444 __u32 s_feature_ro_compat
; /* readonly-compatible feature set */
445 /*68*/ __u8 s_uuid
[16]; /* 128-bit uuid for volume */
446 /*78*/ char s_volume_name
[16]; /* volume name */
447 /*88*/ char s_last_mounted
[64]; /* directory where last mounted */
448 /*C8*/ __u32 s_algorithm_usage_bitmap
; /* For compression */
450 * Performance hints. Directory preallocation should only
451 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
453 __u8 s_prealloc_blocks
; /* Nr of blocks to try to preallocate*/
454 __u8 s_prealloc_dir_blocks
; /* Nr to preallocate for dirs */
457 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
459 /*D0*/ __u8 s_journal_uuid
[16]; /* uuid of journal superblock */
460 /*E0*/ __u32 s_journal_inum
; /* inode number of journal file */
461 __u32 s_journal_dev
; /* device number of journal file */
462 __u32 s_last_orphan
; /* start of list of inodes to delete */
464 /*EC*/ __u32 s_reserved
[197]; /* Padding to the end of the block */
468 #define EXT3_SB(sb) (&((sb)->u.ext3_sb))
469 #define EXT3_I(inode) (&((inode)->u.ext3_i))
471 /* Assume that user mode programs are passing in an ext3fs superblock, not
472 * a kernel struct super_block. This will allow us to call the feature-test
473 * macros from user land. */
474 #define EXT3_SB(sb) (sb)
477 #define NEXT_ORPHAN(inode) (inode)->u.ext3_i.i_dtime
480 * Codes for operating systems
482 #define EXT3_OS_LINUX 0
483 #define EXT3_OS_HURD 1
484 #define EXT3_OS_MASIX 2
485 #define EXT3_OS_FREEBSD 3
486 #define EXT3_OS_LITES 4
491 #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
492 #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
494 #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
495 #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
497 #define EXT3_GOOD_OLD_INODE_SIZE 128
500 * Feature set definitions
503 #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
504 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
505 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
506 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
507 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
508 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
509 #define EXT3_SET_COMPAT_FEATURE(sb,mask) \
510 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
511 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
512 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
513 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
514 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
515 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
516 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
517 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
518 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
519 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
520 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
522 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
523 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
524 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
525 #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
526 #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
527 #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
529 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
530 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
531 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
533 #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
534 #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
535 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
536 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
538 #define EXT3_FEATURE_COMPAT_SUPP 0
539 /*#define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
540 EXT3_FEATURE_INCOMPAT_RECOVER)*/
541 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE)
542 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
543 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
544 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
547 * Default values for user and/or group using reserved blocks
549 #define EXT3_DEF_RESUID 0
550 #define EXT3_DEF_RESGID 0
553 * Structure of a directory entry
555 #define EXT3_NAME_LEN 255
557 struct ext3_dir_entry
{
558 __u32 inode
; /* Inode number */
559 __u16 rec_len
; /* Directory entry length */
560 __u16 name_len
; /* Name length */
561 char name
[EXT3_NAME_LEN
]; /* File name */
565 * The new version of the directory entry. Since EXT3 structures are
566 * stored in intel byte order, and the name_len field could never be
567 * bigger than 255 chars, it's safe to reclaim the extra byte for the
570 struct ext3_dir_entry_2
{
571 __u32 inode
; /* Inode number */
572 __u16 rec_len
; /* Directory entry length */
573 __u8 name_len
; /* Name length */
575 char name
[EXT3_NAME_LEN
]; /* File name */
579 * Ext3 directory file types. Only the low 3 bits are used. The
580 * other bits are reserved for now.
582 #define EXT3_FT_UNKNOWN 0
583 #define EXT3_FT_REG_FILE 1
584 #define EXT3_FT_DIR 2
585 #define EXT3_FT_CHRDEV 3
586 #define EXT3_FT_BLKDEV 4
587 #define EXT3_FT_FIFO 5
588 #define EXT3_FT_SOCK 6
589 #define EXT3_FT_SYMLINK 7
591 #define EXT3_FT_MAX 8
594 * EXT3_DIR_PAD defines the directory entries boundaries
596 * NOTE: It must be a multiple of 4
598 #define EXT3_DIR_PAD 4
599 #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
600 #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
605 * Describe an inode's exact location on disk and in memory
609 struct buffer_head
*bh
;
610 struct ext3_inode
*raw_inode
;
611 unsigned long block_group
;
616 #endif /* __KERNEL__ */
618 #endif /* _LINUX_EXT3_FS_H */
622 typedef struct ext3_super_block EXT2_SUPER_BLOCK
, *PEXT2_SUPER_BLOCK
;
623 typedef struct ext3_inode EXT2_INODE
, *PEXT2_INODE
;
624 typedef struct ext3_group_desc EXT2_GROUP_DESC
, *PEXT2_GROUP_DESC
;
625 typedef struct ext3_dir_entry_2 EXT2_DIR_ENTRY
, *PEXT2_DIR_ENTRY
;
627 // EXT2_INODE::i_mode values
628 #define EXT2_S_IRWXO 0x0007 // Other mask
629 #define EXT2_S_IXOTH 0x0001 // ---------x execute
630 #define EXT2_S_IWOTH 0x0002 // --------w- write
631 #define EXT2_S_IROTH 0x0004 // -------r-- read
633 #define EXT2_S_IRWXG 0x0038 // Group mask
634 #define EXT2_S_IXGRP 0x0008 // ------x--- execute
635 #define EXT2_S_IWGRP 0x0010 // -----w---- write
636 #define EXT2_S_IRGRP 0x0020 // ----r----- read
638 #define EXT2_S_IRWXU 0x01C0 // User mask
639 #define EXT2_S_IXUSR 0x0040 // ---x------ execute
640 #define EXT2_S_IWUSR 0x0080 // --w------- write
641 #define EXT2_S_IRUSR 0x0100 // -r-------- read
643 #define EXT2_S_ISVTX 0x0200 // Sticky bit
644 #define EXT2_S_ISGID 0x0400 // SGID
645 #define EXT2_S_ISUID 0x0800 // SUID
647 #define EXT2_S_IFMT 0xF000 // Format mask
648 #define EXT2_S_IFIFO 0x1000 // FIFO buffer
649 #define EXT2_S_IFCHR 0x2000 // Character device
650 #define EXT2_S_IFDIR 0x4000 // Directory
651 #define EXT2_S_IFBLK 0x6000 // Block device
652 #define EXT2_S_IFREG 0x8000 // Regular file
653 #define EXT2_S_IFLNK 0xA000 // Symbolic link
654 #define EXT2_S_IFSOCK 0xC000 // Socket
656 #define FAST_SYMLINK_MAX_NAME_SIZE (EXT3_N_BLOCKS * sizeof(U32)) /* 60 bytes */
660 U64 FileSize
; // File size
661 U64 FilePointer
; // File pointer
662 U32
* FileBlockList
; // File block list
663 U8 DriveNumber
; // Drive number of open file
664 EXT2_INODE Inode
; // File's inode
665 } EXT2_FILE_INFO
, * PEXT2_FILE_INFO
;
669 BOOL
Ext2OpenVolume(U8 DriveNumber
, U64 VolumeStartSector
);
670 FILE* Ext2OpenFile(PUCHAR FileName
);
671 BOOL
Ext2LookupFile(PUCHAR FileName
, PEXT2_FILE_INFO Ext2FileInfoPointer
);
672 BOOL
Ext2SearchDirectoryBufferForFile(PVOID DirectoryBuffer
, U32 DirectorySize
, PUCHAR FileName
, PEXT2_DIR_ENTRY DirectoryEntry
);
673 BOOL
Ext2ReadFile(FILE *FileHandle
, U64 BytesToRead
, U64
* BytesRead
, PVOID Buffer
);
674 U64
Ext2GetFileSize(FILE *FileHandle
);
675 VOID
Ext2SetFilePointer(FILE *FileHandle
, U64 NewFilePointer
);
676 U64
Ext2GetFilePointer(FILE *FileHandle
);
677 BOOL
Ext2ReadVolumeSectors(U8 DriveNumber
, U64 SectorNumber
, U64 SectorCount
, PVOID Buffer
);
679 BOOL
Ext2ReadSuperBlock(VOID
);
680 BOOL
Ext2ReadGroupDescriptors(VOID
);
681 BOOL
Ext2ReadDirectory(U32 Inode
, PVOID
* DirectoryBuffer
, PEXT2_INODE InodePointer
);
682 BOOL
Ext2ReadBlock(U32 BlockNumber
, PVOID Buffer
);
683 BOOL
Ext2ReadPartialBlock(U32 BlockNumber
, U32 StartingOffset
, U32 Length
, PVOID Buffer
);
684 U32
Ext2GetGroupDescBlockNumber(U32 Group
);
685 U32
Ext2GetGroupDescOffsetInBlock(U32 Group
);
686 U32
Ext2GetInodeGroupNumber(U32 Inode
);
687 U32
Ext2GetInodeBlockNumber(U32 Inode
);
688 U32
Ext2GetInodeOffsetInBlock(U32 Inode
);
689 BOOL
Ext2ReadInode(U32 Inode
, PEXT2_INODE InodeBuffer
);
690 BOOL
Ext2ReadGroupDescriptor(U32 Group
, PEXT2_GROUP_DESC GroupBuffer
);
691 U32
* Ext2ReadBlockPointerList(PEXT2_INODE Inode
);
692 U64
Ext2GetInodeFileSize(PEXT2_INODE Inode
);
693 BOOL
Ext2CopyIndirectBlockPointers(U32
* BlockList
, U32
* CurrentBlockInList
, U32 BlockCount
, U32 IndirectBlock
);
694 BOOL
Ext2CopyDoubleIndirectBlockPointers(U32
* BlockList
, U32
* CurrentBlockInList
, U32 BlockCount
, U32 DoubleIndirectBlock
);
695 BOOL
Ext2CopyTripleIndirectBlockPointers(U32
* BlockList
, U32
* CurrentBlockInList
, U32 BlockCount
, U32 TripleIndirectBlock
);
697 #endif // #defined __EXT2_H