2 * linux/include/linux/ext3_fs.h
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)
11 * linux/include/linux/minix_fs.h
13 * Copyright (C) 1991, 1992 Linus Torvalds
16 #ifndef _LINUX_EXT3_FS_H
17 #define _LINUX_EXT3_FS_H
19 #include <linux/types.h>
20 #include <linux/ext3_fs_i.h>
21 #include <linux/ext3_fs_sb.h>
27 * The second extended filesystem constants/structures
31 * Define EXT3FS_DEBUG to produce debug messages
36 * Define EXT3_RESERVATION to reserve data blocks for expanding files
38 #define EXT3_DEFAULT_RESERVE_BLOCKS 8
39 /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
40 #define EXT3_MAX_RESERVE_BLOCKS 1027
41 #define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
43 * Always enable hashed directories
45 #define CONFIG_EXT3_INDEX
51 #define ext3_debug(f, a...) \
53 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
54 __FILE__, __LINE__, __FUNCTION__); \
55 printk (KERN_DEBUG f, ## a); \
58 #define ext3_debug(f, a...) do {} while (0)
62 * Special inodes numbers
64 #define EXT3_BAD_INO 1 /* Bad blocks inode */
65 #define EXT3_ROOT_INO 2 /* Root inode */
66 #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
67 #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
68 #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
69 #define EXT3_JOURNAL_INO 8 /* Journal inode */
71 /* First non-reserved inode for old ext3 filesystems */
72 #define EXT3_GOOD_OLD_FIRST_INO 11
75 * The second extended file system magic number
77 #define EXT3_SUPER_MAGIC 0xEF53
80 * Maximal count of links to a file
82 #define EXT3_LINK_MAX 32000
85 * Macro-instructions used to manage several block sizes
87 #define EXT3_MIN_BLOCK_SIZE 1024
88 #define EXT3_MAX_BLOCK_SIZE 4096
89 #define EXT3_MIN_BLOCK_LOG_SIZE 10
91 # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
93 # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
95 #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
97 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
99 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
102 #define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
103 #define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
104 #define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
106 #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
107 EXT3_GOOD_OLD_INODE_SIZE : \
109 #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
110 EXT3_GOOD_OLD_FIRST_INO : \
115 * Macro-instructions used to manage fragments
117 #define EXT3_MIN_FRAG_SIZE 1024
118 #define EXT3_MAX_FRAG_SIZE 4096
119 #define EXT3_MIN_FRAG_LOG_SIZE 10
121 # define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
122 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
124 # define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
125 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
129 * Structure of a blocks group descriptor
131 struct ext3_group_desc
133 __le32 bg_block_bitmap
; /* Blocks bitmap block */
134 __le32 bg_inode_bitmap
; /* Inodes bitmap block */
135 __le32 bg_inode_table
; /* Inodes table block */
136 __le16 bg_free_blocks_count
; /* Free blocks count */
137 __le16 bg_free_inodes_count
; /* Free inodes count */
138 __le16 bg_used_dirs_count
; /* Directories count */
140 __le32 bg_reserved
[3];
144 * Macro-instructions used to manage group descriptors
147 # define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
148 # define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
149 # define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
150 # define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
152 # define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
153 # define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
154 # define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
158 * Constants relative to the data blocks
160 #define EXT3_NDIR_BLOCKS 12
161 #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
162 #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
163 #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
164 #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
169 #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
170 #define EXT3_UNRM_FL 0x00000002 /* Undelete */
171 #define EXT3_COMPR_FL 0x00000004 /* Compress file */
172 #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
173 #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
174 #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
175 #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
176 #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
177 /* Reserved for compression usage... */
178 #define EXT3_DIRTY_FL 0x00000100
179 #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
180 #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
181 #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
182 /* End compression flags --- maybe not all used */
183 #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
184 #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
185 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
186 #define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
187 #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
188 #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
189 #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
191 #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
192 #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
195 * Inode dynamic state flags
197 #define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
198 #define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
199 #define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */
201 /* Used to pass group descriptor data when online resize is done */
202 struct ext3_new_group_input
{
203 __u32 group
; /* Group number for this data */
204 __u32 block_bitmap
; /* Absolute block number of block bitmap */
205 __u32 inode_bitmap
; /* Absolute block number of inode bitmap */
206 __u32 inode_table
; /* Absolute block number of inode table start */
207 __u32 blocks_count
; /* Total number of blocks in this group */
208 __u16 reserved_blocks
; /* Number of reserved blocks in this group */
212 /* The struct ext3_new_group_input in kernel space, with free_blocks_count */
213 struct ext3_new_group_data
{
219 __u16 reserved_blocks
;
221 __u32 free_blocks_count
;
228 #define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
229 #define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
230 #define EXT3_IOC_GETVERSION _IOR('f', 3, long)
231 #define EXT3_IOC_SETVERSION _IOW('f', 4, long)
232 #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
233 #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
234 #define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
235 #define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
236 #ifdef CONFIG_JBD_DEBUG
237 #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
239 #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
240 #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
245 struct ext3_mount_options
{
246 unsigned long s_mount_opt
;
249 unsigned long s_commit_interval
;
252 char *s_qf_names
[MAXQUOTAS
];
257 * Structure of an inode on the disk
260 __le16 i_mode
; /* File mode */
261 __le16 i_uid
; /* Low 16 bits of Owner Uid */
262 __le32 i_size
; /* Size in bytes */
263 __le32 i_atime
; /* Access time */
264 __le32 i_ctime
; /* Creation time */
265 __le32 i_mtime
; /* Modification time */
266 __le32 i_dtime
; /* Deletion Time */
267 __le16 i_gid
; /* Low 16 bits of Group Id */
268 __le16 i_links_count
; /* Links count */
269 __le32 i_blocks
; /* Blocks count */
270 __le32 i_flags
; /* File flags */
276 __u32 h_i_translator
;
281 } osd1
; /* OS dependent 1 */
282 __le32 i_block
[EXT3_N_BLOCKS
];/* Pointers to blocks */
283 __le32 i_generation
; /* File version (for NFS) */
284 __le32 i_file_acl
; /* File ACL */
285 __le32 i_dir_acl
; /* Directory ACL */
286 __le32 i_faddr
; /* Fragment address */
289 __u8 l_i_frag
; /* Fragment number */
290 __u8 l_i_fsize
; /* Fragment size */
292 __le16 l_i_uid_high
; /* these 2 fields */
293 __le16 l_i_gid_high
; /* were reserved2[0] */
297 __u8 h_i_frag
; /* Fragment number */
298 __u8 h_i_fsize
; /* Fragment size */
305 __u8 m_i_frag
; /* Fragment number */
306 __u8 m_i_fsize
; /* Fragment size */
308 __u32 m_i_reserved2
[2];
310 } osd2
; /* OS dependent 2 */
311 __le16 i_extra_isize
;
315 #define i_size_high i_dir_acl
317 #if defined(__KERNEL__) || defined(__linux__)
318 #define i_reserved1 osd1.linux1.l_i_reserved1
319 #define i_frag osd2.linux2.l_i_frag
320 #define i_fsize osd2.linux2.l_i_fsize
321 #define i_uid_low i_uid
322 #define i_gid_low i_gid
323 #define i_uid_high osd2.linux2.l_i_uid_high
324 #define i_gid_high osd2.linux2.l_i_gid_high
325 #define i_reserved2 osd2.linux2.l_i_reserved2
327 #elif defined(__GNU__)
329 #define i_translator osd1.hurd1.h_i_translator
330 #define i_frag osd2.hurd2.h_i_frag;
331 #define i_fsize osd2.hurd2.h_i_fsize;
332 #define i_uid_high osd2.hurd2.h_i_uid_high
333 #define i_gid_high osd2.hurd2.h_i_gid_high
334 #define i_author osd2.hurd2.h_i_author
336 #elif defined(__masix__)
338 #define i_reserved1 osd1.masix1.m_i_reserved1
339 #define i_frag osd2.masix2.m_i_frag
340 #define i_fsize osd2.masix2.m_i_fsize
341 #define i_reserved2 osd2.masix2.m_i_reserved2
343 #endif /* defined(__KERNEL__) || defined(__linux__) */
348 #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
349 #define EXT3_ERROR_FS 0x0002 /* Errors detected */
350 #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
355 #define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */
356 #define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
357 #define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */
358 #define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */
359 #define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
360 #define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
361 #define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
362 #define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
363 #define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
364 #define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */
365 #define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
366 #define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
367 #define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
368 #define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
369 #define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
370 #define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
371 #define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
372 #define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
373 #define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
374 #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
375 #define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */
376 #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
377 #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
378 #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
380 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
381 #ifndef _LINUX_EXT2_FS_H
382 #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
383 #define set_opt(o, opt) o |= EXT3_MOUNT_##opt
384 #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
387 #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
388 #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
389 #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
392 #define ext3_set_bit ext2_set_bit
393 #define ext3_set_bit_atomic ext2_set_bit_atomic
394 #define ext3_clear_bit ext2_clear_bit
395 #define ext3_clear_bit_atomic ext2_clear_bit_atomic
396 #define ext3_test_bit ext2_test_bit
397 #define ext3_find_first_zero_bit ext2_find_first_zero_bit
398 #define ext3_find_next_zero_bit ext2_find_next_zero_bit
401 * Maximal mount counts between two filesystem checks
403 #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
404 #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
407 * Behaviour when detecting errors
409 #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
410 #define EXT3_ERRORS_RO 2 /* Remount fs read-only */
411 #define EXT3_ERRORS_PANIC 3 /* Panic */
412 #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
415 * Structure of the super block
417 struct ext3_super_block
{
418 /*00*/ __le32 s_inodes_count
; /* Inodes count */
419 __le32 s_blocks_count
; /* Blocks count */
420 __le32 s_r_blocks_count
; /* Reserved blocks count */
421 __le32 s_free_blocks_count
; /* Free blocks count */
422 /*10*/ __le32 s_free_inodes_count
; /* Free inodes count */
423 __le32 s_first_data_block
; /* First Data Block */
424 __le32 s_log_block_size
; /* Block size */
425 __le32 s_log_frag_size
; /* Fragment size */
426 /*20*/ __le32 s_blocks_per_group
; /* # Blocks per group */
427 __le32 s_frags_per_group
; /* # Fragments per group */
428 __le32 s_inodes_per_group
; /* # Inodes per group */
429 __le32 s_mtime
; /* Mount time */
430 /*30*/ __le32 s_wtime
; /* Write time */
431 __le16 s_mnt_count
; /* Mount count */
432 __le16 s_max_mnt_count
; /* Maximal mount count */
433 __le16 s_magic
; /* Magic signature */
434 __le16 s_state
; /* File system state */
435 __le16 s_errors
; /* Behaviour when detecting errors */
436 __le16 s_minor_rev_level
; /* minor revision level */
437 /*40*/ __le32 s_lastcheck
; /* time of last check */
438 __le32 s_checkinterval
; /* max. time between checks */
439 __le32 s_creator_os
; /* OS */
440 __le32 s_rev_level
; /* Revision level */
441 /*50*/ __le16 s_def_resuid
; /* Default uid for reserved blocks */
442 __le16 s_def_resgid
; /* Default gid for reserved blocks */
444 * These fields are for EXT3_DYNAMIC_REV superblocks only.
446 * Note: the difference between the compatible feature set and
447 * the incompatible feature set is that if there is a bit set
448 * in the incompatible feature set that the kernel doesn't
449 * know about, it should refuse to mount the filesystem.
451 * e2fsck's requirements are more strict; if it doesn't know
452 * about a feature in either the compatible or incompatible
453 * feature set, it must abort and not try to meddle with
454 * things it doesn't understand...
456 __le32 s_first_ino
; /* First non-reserved inode */
457 __le16 s_inode_size
; /* size of inode structure */
458 __le16 s_block_group_nr
; /* block group # of this superblock */
459 __le32 s_feature_compat
; /* compatible feature set */
460 /*60*/ __le32 s_feature_incompat
; /* incompatible feature set */
461 __le32 s_feature_ro_compat
; /* readonly-compatible feature set */
462 /*68*/ __u8 s_uuid
[16]; /* 128-bit uuid for volume */
463 /*78*/ char s_volume_name
[16]; /* volume name */
464 /*88*/ char s_last_mounted
[64]; /* directory where last mounted */
465 /*C8*/ __le32 s_algorithm_usage_bitmap
; /* For compression */
467 * Performance hints. Directory preallocation should only
468 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
470 __u8 s_prealloc_blocks
; /* Nr of blocks to try to preallocate*/
471 __u8 s_prealloc_dir_blocks
; /* Nr to preallocate for dirs */
472 __u16 s_reserved_gdt_blocks
; /* Per group desc for online growth */
474 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
476 /*D0*/ __u8 s_journal_uuid
[16]; /* uuid of journal superblock */
477 /*E0*/ __le32 s_journal_inum
; /* inode number of journal file */
478 __le32 s_journal_dev
; /* device number of journal file */
479 __le32 s_last_orphan
; /* start of list of inodes to delete */
480 __le32 s_hash_seed
[4]; /* HTREE hash seed */
481 __u8 s_def_hash_version
; /* Default hash version to use */
482 __u8 s_reserved_char_pad
;
483 __u16 s_reserved_word_pad
;
484 __le32 s_default_mount_opts
;
485 __le32 s_first_meta_bg
; /* First metablock block group */
486 __u32 s_reserved
[190]; /* Padding to the end of the block */
490 static inline struct ext3_sb_info
* EXT3_SB(struct super_block
*sb
)
492 return sb
->s_fs_info
;
494 static inline struct ext3_inode_info
*EXT3_I(struct inode
*inode
)
496 return container_of(inode
, struct ext3_inode_info
, vfs_inode
);
499 /* Assume that user mode programs are passing in an ext3fs superblock, not
500 * a kernel struct super_block. This will allow us to call the feature-test
501 * macros from user land. */
502 #define EXT3_SB(sb) (sb)
505 #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
508 * Codes for operating systems
510 #define EXT3_OS_LINUX 0
511 #define EXT3_OS_HURD 1
512 #define EXT3_OS_MASIX 2
513 #define EXT3_OS_FREEBSD 3
514 #define EXT3_OS_LITES 4
519 #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
520 #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
522 #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
523 #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
525 #define EXT3_GOOD_OLD_INODE_SIZE 128
528 * Feature set definitions
531 #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
532 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
533 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
534 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
535 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
536 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
537 #define EXT3_SET_COMPAT_FEATURE(sb,mask) \
538 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
539 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
540 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
541 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
542 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
543 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
544 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
545 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
546 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
547 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
548 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
550 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
551 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
552 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
553 #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
554 #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
555 #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
557 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
558 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
559 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
561 #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
562 #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
563 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
564 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
565 #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
567 #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
568 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
569 EXT3_FEATURE_INCOMPAT_RECOVER| \
570 EXT3_FEATURE_INCOMPAT_META_BG)
571 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
572 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
573 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
576 * Default values for user and/or group using reserved blocks
578 #define EXT3_DEF_RESUID 0
579 #define EXT3_DEF_RESGID 0
582 * Default mount options
584 #define EXT3_DEFM_DEBUG 0x0001
585 #define EXT3_DEFM_BSDGROUPS 0x0002
586 #define EXT3_DEFM_XATTR_USER 0x0004
587 #define EXT3_DEFM_ACL 0x0008
588 #define EXT3_DEFM_UID16 0x0010
589 #define EXT3_DEFM_JMODE 0x0060
590 #define EXT3_DEFM_JMODE_DATA 0x0020
591 #define EXT3_DEFM_JMODE_ORDERED 0x0040
592 #define EXT3_DEFM_JMODE_WBACK 0x0060
595 * Structure of a directory entry
597 #define EXT3_NAME_LEN 255
599 struct ext3_dir_entry
{
600 __le32 inode
; /* Inode number */
601 __le16 rec_len
; /* Directory entry length */
602 __le16 name_len
; /* Name length */
603 char name
[EXT3_NAME_LEN
]; /* File name */
607 * The new version of the directory entry. Since EXT3 structures are
608 * stored in intel byte order, and the name_len field could never be
609 * bigger than 255 chars, it's safe to reclaim the extra byte for the
612 struct ext3_dir_entry_2
{
613 __le32 inode
; /* Inode number */
614 __le16 rec_len
; /* Directory entry length */
615 __u8 name_len
; /* Name length */
617 char name
[EXT3_NAME_LEN
]; /* File name */
621 * Ext3 directory file types. Only the low 3 bits are used. The
622 * other bits are reserved for now.
624 #define EXT3_FT_UNKNOWN 0
625 #define EXT3_FT_REG_FILE 1
626 #define EXT3_FT_DIR 2
627 #define EXT3_FT_CHRDEV 3
628 #define EXT3_FT_BLKDEV 4
629 #define EXT3_FT_FIFO 5
630 #define EXT3_FT_SOCK 6
631 #define EXT3_FT_SYMLINK 7
633 #define EXT3_FT_MAX 8
636 * EXT3_DIR_PAD defines the directory entries boundaries
638 * NOTE: It must be a multiple of 4
640 #define EXT3_DIR_PAD 4
641 #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
642 #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
645 * Hash Tree Directory indexing
646 * (c) Daniel Phillips, 2001
649 #ifdef CONFIG_EXT3_INDEX
650 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
651 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
652 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
653 #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
654 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
657 #define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
658 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
661 /* Legal values for the dx_root hash_version field: */
663 #define DX_HASH_LEGACY 0
664 #define DX_HASH_HALF_MD4 1
665 #define DX_HASH_TEA 2
667 /* hash info structure used by the directory hash */
676 #define EXT3_HTREE_EOF 0x7fffffff
680 * Control parameters used by ext3_htree_next_block
682 #define HASH_NB_ALWAYS 1
686 * Describe an inode's exact location on disk and in memory
690 struct buffer_head
*bh
;
691 unsigned long offset
;
692 unsigned long block_group
;
695 static inline struct ext3_inode
*ext3_raw_inode(struct ext3_iloc
*iloc
)
697 return (struct ext3_inode
*) (iloc
->bh
->b_data
+ iloc
->offset
);
701 * This structure is stuffed into the struct file's private_data field
702 * for directories. It is where we put information so that we can do
703 * readdir operations in hash tree order.
705 struct dir_private_info
{
707 struct rb_node
*curr_node
;
708 struct fname
*extra_fname
;
711 __u32 curr_minor_hash
;
716 * Special error return code only used by dx_probe() and its callers.
718 #define ERR_BAD_DX_DIR -75000
721 * Function prototypes
725 * Ok, these declarations are also in <linux/kernel.h> but none of the
726 * ext3 source programs needs to include it so they are duplicated here.
728 # define NORET_TYPE /**/
729 # define ATTRIB_NORET __attribute__((noreturn))
730 # define NORET_AND noreturn,
733 extern int ext3_bg_has_super(struct super_block
*sb
, int group
);
734 extern unsigned long ext3_bg_num_gdb(struct super_block
*sb
, int group
);
735 extern int ext3_new_block (handle_t
*, struct inode
*, unsigned long, int *);
736 extern int ext3_new_blocks (handle_t
*, struct inode
*, unsigned long,
737 unsigned long *, int *);
738 extern void ext3_free_blocks (handle_t
*, struct inode
*, unsigned long,
740 extern void ext3_free_blocks_sb (handle_t
*, struct super_block
*,
741 unsigned long, unsigned long, int *);
742 extern unsigned long ext3_count_free_blocks (struct super_block
*);
743 extern void ext3_check_blocks_bitmap (struct super_block
*);
744 extern struct ext3_group_desc
* ext3_get_group_desc(struct super_block
* sb
,
745 unsigned int block_group
,
746 struct buffer_head
** bh
);
747 extern int ext3_should_retry_alloc(struct super_block
*sb
, int *retries
);
748 extern void ext3_init_block_alloc_info(struct inode
*);
749 extern void ext3_rsv_window_add(struct super_block
*sb
, struct ext3_reserve_window_node
*rsv
);
752 extern int ext3_check_dir_entry(const char *, struct inode
*,
753 struct ext3_dir_entry_2
*,
754 struct buffer_head
*, unsigned long);
755 extern int ext3_htree_store_dirent(struct file
*dir_file
, __u32 hash
,
757 struct ext3_dir_entry_2
*dirent
);
758 extern void ext3_htree_free_dir_info(struct dir_private_info
*p
);
761 extern int ext3_sync_file (struct file
*, struct dentry
*, int);
764 extern int ext3fs_dirhash(const char *name
, int len
, struct
765 dx_hash_info
*hinfo
);
768 extern struct inode
* ext3_new_inode (handle_t
*, struct inode
*, int);
769 extern void ext3_free_inode (handle_t
*, struct inode
*);
770 extern struct inode
* ext3_orphan_get (struct super_block
*, unsigned long);
771 extern unsigned long ext3_count_free_inodes (struct super_block
*);
772 extern unsigned long ext3_count_dirs (struct super_block
*);
773 extern void ext3_check_inodes_bitmap (struct super_block
*);
774 extern unsigned long ext3_count_free (struct buffer_head
*, unsigned);
778 int ext3_forget(handle_t
*, int, struct inode
*, struct buffer_head
*, int);
779 struct buffer_head
* ext3_getblk (handle_t
*, struct inode
*, long, int, int *);
780 struct buffer_head
* ext3_bread (handle_t
*, struct inode
*, int, int, int *);
781 int ext3_get_blocks_handle(handle_t
*handle
, struct inode
*inode
,
782 sector_t iblock
, unsigned long maxblocks
, struct buffer_head
*bh_result
,
783 int create
, int extend_disksize
);
785 extern void ext3_read_inode (struct inode
*);
786 extern int ext3_write_inode (struct inode
*, int);
787 extern int ext3_setattr (struct dentry
*, struct iattr
*);
788 extern void ext3_delete_inode (struct inode
*);
789 extern int ext3_sync_inode (handle_t
*, struct inode
*);
790 extern void ext3_discard_reservation (struct inode
*);
791 extern void ext3_dirty_inode(struct inode
*);
792 extern int ext3_change_inode_journal_flag(struct inode
*, int);
793 extern int ext3_get_inode_loc(struct inode
*, struct ext3_iloc
*);
794 extern void ext3_truncate (struct inode
*);
795 extern void ext3_set_inode_flags(struct inode
*);
796 extern void ext3_set_aops(struct inode
*inode
);
799 extern int ext3_ioctl (struct inode
*, struct file
*, unsigned int,
803 extern int ext3_orphan_add(handle_t
*, struct inode
*);
804 extern int ext3_orphan_del(handle_t
*, struct inode
*);
805 extern int ext3_htree_fill_tree(struct file
*dir_file
, __u32 start_hash
,
806 __u32 start_minor_hash
, __u32
*next_hash
);
809 extern int ext3_group_add(struct super_block
*sb
,
810 struct ext3_new_group_data
*input
);
811 extern int ext3_group_extend(struct super_block
*sb
,
812 struct ext3_super_block
*es
,
813 unsigned long n_blocks_count
);
816 extern void ext3_error (struct super_block
*, const char *, const char *, ...)
817 __attribute__ ((format (printf
, 3, 4)));
818 extern void __ext3_std_error (struct super_block
*, const char *, int);
819 extern void ext3_abort (struct super_block
*, const char *, const char *, ...)
820 __attribute__ ((format (printf
, 3, 4)));
821 extern void ext3_warning (struct super_block
*, const char *, const char *, ...)
822 __attribute__ ((format (printf
, 3, 4)));
823 extern void ext3_update_dynamic_rev (struct super_block
*sb
);
825 #define ext3_std_error(sb, errno) \
828 __ext3_std_error((sb), __FUNCTION__, (errno)); \
832 * Inodes and files operations
836 extern const struct file_operations ext3_dir_operations
;
839 extern struct inode_operations ext3_file_inode_operations
;
840 extern const struct file_operations ext3_file_operations
;
843 extern struct inode_operations ext3_dir_inode_operations
;
844 extern struct inode_operations ext3_special_inode_operations
;
847 extern struct inode_operations ext3_symlink_inode_operations
;
848 extern struct inode_operations ext3_fast_symlink_inode_operations
;
851 #endif /* __KERNEL__ */
853 #endif /* _LINUX_EXT3_FS_H */