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/magic.h>
23 * The second extended filesystem constants/structures
27 * Define EXT3FS_DEBUG to produce debug messages
32 * Define EXT3_RESERVATION to reserve data blocks for expanding files
34 #define EXT3_DEFAULT_RESERVE_BLOCKS 8
35 /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
36 #define EXT3_MAX_RESERVE_BLOCKS 1027
37 #define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
39 * Always enable hashed directories
41 #define CONFIG_EXT3_INDEX
47 #define ext3_debug(f, a...) \
49 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
50 __FILE__, __LINE__, __FUNCTION__); \
51 printk (KERN_DEBUG f, ## a); \
54 #define ext3_debug(f, a...) do {} while (0)
58 * Special inodes numbers
60 #define EXT3_BAD_INO 1 /* Bad blocks inode */
61 #define EXT3_ROOT_INO 2 /* Root inode */
62 #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
63 #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
64 #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
65 #define EXT3_JOURNAL_INO 8 /* Journal inode */
67 /* First non-reserved inode for old ext3 filesystems */
68 #define EXT3_GOOD_OLD_FIRST_INO 11
71 * Maximal count of links to a file
73 #define EXT3_LINK_MAX 32000
76 * Macro-instructions used to manage several block sizes
78 #define EXT3_MIN_BLOCK_SIZE 1024
79 #define EXT3_MAX_BLOCK_SIZE 4096
80 #define EXT3_MIN_BLOCK_LOG_SIZE 10
82 # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
84 # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
86 #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
88 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
90 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
93 #define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
94 #define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
95 #define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
97 #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
98 EXT3_GOOD_OLD_INODE_SIZE : \
100 #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
101 EXT3_GOOD_OLD_FIRST_INO : \
106 * Macro-instructions used to manage fragments
108 #define EXT3_MIN_FRAG_SIZE 1024
109 #define EXT3_MAX_FRAG_SIZE 4096
110 #define EXT3_MIN_FRAG_LOG_SIZE 10
112 # define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
113 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
115 # define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
116 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
120 * Structure of a blocks group descriptor
122 struct ext3_group_desc
124 __le32 bg_block_bitmap
; /* Blocks bitmap block */
125 __le32 bg_inode_bitmap
; /* Inodes bitmap block */
126 __le32 bg_inode_table
; /* Inodes table block */
127 __le16 bg_free_blocks_count
; /* Free blocks count */
128 __le16 bg_free_inodes_count
; /* Free inodes count */
129 __le16 bg_used_dirs_count
; /* Directories count */
131 __le32 bg_reserved
[3];
135 * Macro-instructions used to manage group descriptors
138 # define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
139 # define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
140 # define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
141 # define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
143 # define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
144 # define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
145 # define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
149 * Constants relative to the data blocks
151 #define EXT3_NDIR_BLOCKS 12
152 #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
153 #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
154 #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
155 #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
160 #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
161 #define EXT3_UNRM_FL 0x00000002 /* Undelete */
162 #define EXT3_COMPR_FL 0x00000004 /* Compress file */
163 #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
164 #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
165 #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
166 #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
167 #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
168 /* Reserved for compression usage... */
169 #define EXT3_DIRTY_FL 0x00000100
170 #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
171 #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
172 #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
173 /* End compression flags --- maybe not all used */
174 #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
175 #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
176 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
177 #define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
178 #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
179 #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
180 #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
182 #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
183 #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
186 * Inode dynamic state flags
188 #define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
189 #define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
190 #define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */
192 /* Used to pass group descriptor data when online resize is done */
193 struct ext3_new_group_input
{
194 __u32 group
; /* Group number for this data */
195 __u32 block_bitmap
; /* Absolute block number of block bitmap */
196 __u32 inode_bitmap
; /* Absolute block number of inode bitmap */
197 __u32 inode_table
; /* Absolute block number of inode table start */
198 __u32 blocks_count
; /* Total number of blocks in this group */
199 __u16 reserved_blocks
; /* Number of reserved blocks in this group */
203 /* The struct ext3_new_group_input in kernel space, with free_blocks_count */
204 struct ext3_new_group_data
{
210 __u16 reserved_blocks
;
212 __u32 free_blocks_count
;
219 #define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
220 #define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
221 #define EXT3_IOC_GETVERSION _IOR('f', 3, long)
222 #define EXT3_IOC_SETVERSION _IOW('f', 4, long)
223 #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
224 #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
225 #define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
226 #define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
227 #ifdef CONFIG_JBD_DEBUG
228 #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
230 #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
231 #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
236 struct ext3_mount_options
{
237 unsigned long s_mount_opt
;
240 unsigned long s_commit_interval
;
243 char *s_qf_names
[MAXQUOTAS
];
248 * Structure of an inode on the disk
251 __le16 i_mode
; /* File mode */
252 __le16 i_uid
; /* Low 16 bits of Owner Uid */
253 __le32 i_size
; /* Size in bytes */
254 __le32 i_atime
; /* Access time */
255 __le32 i_ctime
; /* Creation time */
256 __le32 i_mtime
; /* Modification time */
257 __le32 i_dtime
; /* Deletion Time */
258 __le16 i_gid
; /* Low 16 bits of Group Id */
259 __le16 i_links_count
; /* Links count */
260 __le32 i_blocks
; /* Blocks count */
261 __le32 i_flags
; /* File flags */
267 __u32 h_i_translator
;
272 } osd1
; /* OS dependent 1 */
273 __le32 i_block
[EXT3_N_BLOCKS
];/* Pointers to blocks */
274 __le32 i_generation
; /* File version (for NFS) */
275 __le32 i_file_acl
; /* File ACL */
276 __le32 i_dir_acl
; /* Directory ACL */
277 __le32 i_faddr
; /* Fragment address */
280 __u8 l_i_frag
; /* Fragment number */
281 __u8 l_i_fsize
; /* Fragment size */
283 __le16 l_i_uid_high
; /* these 2 fields */
284 __le16 l_i_gid_high
; /* were reserved2[0] */
288 __u8 h_i_frag
; /* Fragment number */
289 __u8 h_i_fsize
; /* Fragment size */
296 __u8 m_i_frag
; /* Fragment number */
297 __u8 m_i_fsize
; /* Fragment size */
299 __u32 m_i_reserved2
[2];
301 } osd2
; /* OS dependent 2 */
302 __le16 i_extra_isize
;
306 #define i_size_high i_dir_acl
308 #if defined(__KERNEL__) || defined(__linux__)
309 #define i_reserved1 osd1.linux1.l_i_reserved1
310 #define i_frag osd2.linux2.l_i_frag
311 #define i_fsize osd2.linux2.l_i_fsize
312 #define i_uid_low i_uid
313 #define i_gid_low i_gid
314 #define i_uid_high osd2.linux2.l_i_uid_high
315 #define i_gid_high osd2.linux2.l_i_gid_high
316 #define i_reserved2 osd2.linux2.l_i_reserved2
318 #elif defined(__GNU__)
320 #define i_translator osd1.hurd1.h_i_translator
321 #define i_frag osd2.hurd2.h_i_frag;
322 #define i_fsize osd2.hurd2.h_i_fsize;
323 #define i_uid_high osd2.hurd2.h_i_uid_high
324 #define i_gid_high osd2.hurd2.h_i_gid_high
325 #define i_author osd2.hurd2.h_i_author
327 #elif defined(__masix__)
329 #define i_reserved1 osd1.masix1.m_i_reserved1
330 #define i_frag osd2.masix2.m_i_frag
331 #define i_fsize osd2.masix2.m_i_fsize
332 #define i_reserved2 osd2.masix2.m_i_reserved2
334 #endif /* defined(__KERNEL__) || defined(__linux__) */
339 #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
340 #define EXT3_ERROR_FS 0x0002 /* Errors detected */
341 #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
346 #define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */
347 #define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
348 #define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */
349 #define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */
350 #define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
351 #define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
352 #define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
353 #define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
354 #define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
355 #define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */
356 #define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
357 #define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
358 #define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
359 #define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
360 #define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
361 #define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
362 #define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
363 #define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
364 #define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
365 #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
366 #define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */
367 #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
368 #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
369 #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
371 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
372 #ifndef _LINUX_EXT2_FS_H
373 #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
374 #define set_opt(o, opt) o |= EXT3_MOUNT_##opt
375 #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
378 #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
379 #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
380 #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
383 #define ext3_set_bit ext2_set_bit
384 #define ext3_set_bit_atomic ext2_set_bit_atomic
385 #define ext3_clear_bit ext2_clear_bit
386 #define ext3_clear_bit_atomic ext2_clear_bit_atomic
387 #define ext3_test_bit ext2_test_bit
388 #define ext3_find_first_zero_bit ext2_find_first_zero_bit
389 #define ext3_find_next_zero_bit ext2_find_next_zero_bit
392 * Maximal mount counts between two filesystem checks
394 #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
395 #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
398 * Behaviour when detecting errors
400 #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
401 #define EXT3_ERRORS_RO 2 /* Remount fs read-only */
402 #define EXT3_ERRORS_PANIC 3 /* Panic */
403 #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
406 * Structure of the super block
408 struct ext3_super_block
{
409 /*00*/ __le32 s_inodes_count
; /* Inodes count */
410 __le32 s_blocks_count
; /* Blocks count */
411 __le32 s_r_blocks_count
; /* Reserved blocks count */
412 __le32 s_free_blocks_count
; /* Free blocks count */
413 /*10*/ __le32 s_free_inodes_count
; /* Free inodes count */
414 __le32 s_first_data_block
; /* First Data Block */
415 __le32 s_log_block_size
; /* Block size */
416 __le32 s_log_frag_size
; /* Fragment size */
417 /*20*/ __le32 s_blocks_per_group
; /* # Blocks per group */
418 __le32 s_frags_per_group
; /* # Fragments per group */
419 __le32 s_inodes_per_group
; /* # Inodes per group */
420 __le32 s_mtime
; /* Mount time */
421 /*30*/ __le32 s_wtime
; /* Write time */
422 __le16 s_mnt_count
; /* Mount count */
423 __le16 s_max_mnt_count
; /* Maximal mount count */
424 __le16 s_magic
; /* Magic signature */
425 __le16 s_state
; /* File system state */
426 __le16 s_errors
; /* Behaviour when detecting errors */
427 __le16 s_minor_rev_level
; /* minor revision level */
428 /*40*/ __le32 s_lastcheck
; /* time of last check */
429 __le32 s_checkinterval
; /* max. time between checks */
430 __le32 s_creator_os
; /* OS */
431 __le32 s_rev_level
; /* Revision level */
432 /*50*/ __le16 s_def_resuid
; /* Default uid for reserved blocks */
433 __le16 s_def_resgid
; /* Default gid for reserved blocks */
435 * These fields are for EXT3_DYNAMIC_REV superblocks only.
437 * Note: the difference between the compatible feature set and
438 * the incompatible feature set is that if there is a bit set
439 * in the incompatible feature set that the kernel doesn't
440 * know about, it should refuse to mount the filesystem.
442 * e2fsck's requirements are more strict; if it doesn't know
443 * about a feature in either the compatible or incompatible
444 * feature set, it must abort and not try to meddle with
445 * things it doesn't understand...
447 __le32 s_first_ino
; /* First non-reserved inode */
448 __le16 s_inode_size
; /* size of inode structure */
449 __le16 s_block_group_nr
; /* block group # of this superblock */
450 __le32 s_feature_compat
; /* compatible feature set */
451 /*60*/ __le32 s_feature_incompat
; /* incompatible feature set */
452 __le32 s_feature_ro_compat
; /* readonly-compatible feature set */
453 /*68*/ __u8 s_uuid
[16]; /* 128-bit uuid for volume */
454 /*78*/ char s_volume_name
[16]; /* volume name */
455 /*88*/ char s_last_mounted
[64]; /* directory where last mounted */
456 /*C8*/ __le32 s_algorithm_usage_bitmap
; /* For compression */
458 * Performance hints. Directory preallocation should only
459 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
461 __u8 s_prealloc_blocks
; /* Nr of blocks to try to preallocate*/
462 __u8 s_prealloc_dir_blocks
; /* Nr to preallocate for dirs */
463 __u16 s_reserved_gdt_blocks
; /* Per group desc for online growth */
465 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
467 /*D0*/ __u8 s_journal_uuid
[16]; /* uuid of journal superblock */
468 /*E0*/ __le32 s_journal_inum
; /* inode number of journal file */
469 __le32 s_journal_dev
; /* device number of journal file */
470 __le32 s_last_orphan
; /* start of list of inodes to delete */
471 __le32 s_hash_seed
[4]; /* HTREE hash seed */
472 __u8 s_def_hash_version
; /* Default hash version to use */
473 __u8 s_reserved_char_pad
;
474 __u16 s_reserved_word_pad
;
475 __le32 s_default_mount_opts
;
476 __le32 s_first_meta_bg
; /* First metablock block group */
477 __u32 s_reserved
[190]; /* Padding to the end of the block */
481 #include <linux/ext3_fs_i.h>
482 #include <linux/ext3_fs_sb.h>
483 static inline struct ext3_sb_info
* EXT3_SB(struct super_block
*sb
)
485 return sb
->s_fs_info
;
487 static inline struct ext3_inode_info
*EXT3_I(struct inode
*inode
)
489 return container_of(inode
, struct ext3_inode_info
, vfs_inode
);
492 static inline int ext3_valid_inum(struct super_block
*sb
, unsigned long ino
)
494 return ino
== EXT3_ROOT_INO
||
495 ino
== EXT3_JOURNAL_INO
||
496 ino
== EXT3_RESIZE_INO
||
497 (ino
>= EXT3_FIRST_INO(sb
) &&
498 ino
<= le32_to_cpu(EXT3_SB(sb
)->s_es
->s_inodes_count
));
501 /* Assume that user mode programs are passing in an ext3fs superblock, not
502 * a kernel struct super_block. This will allow us to call the feature-test
503 * macros from user land. */
504 #define EXT3_SB(sb) (sb)
507 #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
510 * Codes for operating systems
512 #define EXT3_OS_LINUX 0
513 #define EXT3_OS_HURD 1
514 #define EXT3_OS_MASIX 2
515 #define EXT3_OS_FREEBSD 3
516 #define EXT3_OS_LITES 4
521 #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
522 #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
524 #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
525 #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
527 #define EXT3_GOOD_OLD_INODE_SIZE 128
530 * Feature set definitions
533 #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
534 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
535 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
536 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
537 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
538 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
539 #define EXT3_SET_COMPAT_FEATURE(sb,mask) \
540 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
541 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
542 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
543 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
544 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
545 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
546 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
547 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
548 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
549 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
550 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
552 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
553 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
554 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
555 #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
556 #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
557 #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
559 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
560 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
561 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
563 #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
564 #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
565 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
566 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
567 #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
569 #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
570 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
571 EXT3_FEATURE_INCOMPAT_RECOVER| \
572 EXT3_FEATURE_INCOMPAT_META_BG)
573 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
574 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
575 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
578 * Default values for user and/or group using reserved blocks
580 #define EXT3_DEF_RESUID 0
581 #define EXT3_DEF_RESGID 0
584 * Default mount options
586 #define EXT3_DEFM_DEBUG 0x0001
587 #define EXT3_DEFM_BSDGROUPS 0x0002
588 #define EXT3_DEFM_XATTR_USER 0x0004
589 #define EXT3_DEFM_ACL 0x0008
590 #define EXT3_DEFM_UID16 0x0010
591 #define EXT3_DEFM_JMODE 0x0060
592 #define EXT3_DEFM_JMODE_DATA 0x0020
593 #define EXT3_DEFM_JMODE_ORDERED 0x0040
594 #define EXT3_DEFM_JMODE_WBACK 0x0060
597 * Structure of a directory entry
599 #define EXT3_NAME_LEN 255
601 struct ext3_dir_entry
{
602 __le32 inode
; /* Inode number */
603 __le16 rec_len
; /* Directory entry length */
604 __le16 name_len
; /* Name length */
605 char name
[EXT3_NAME_LEN
]; /* File name */
609 * The new version of the directory entry. Since EXT3 structures are
610 * stored in intel byte order, and the name_len field could never be
611 * bigger than 255 chars, it's safe to reclaim the extra byte for the
614 struct ext3_dir_entry_2
{
615 __le32 inode
; /* Inode number */
616 __le16 rec_len
; /* Directory entry length */
617 __u8 name_len
; /* Name length */
619 char name
[EXT3_NAME_LEN
]; /* File name */
623 * Ext3 directory file types. Only the low 3 bits are used. The
624 * other bits are reserved for now.
626 #define EXT3_FT_UNKNOWN 0
627 #define EXT3_FT_REG_FILE 1
628 #define EXT3_FT_DIR 2
629 #define EXT3_FT_CHRDEV 3
630 #define EXT3_FT_BLKDEV 4
631 #define EXT3_FT_FIFO 5
632 #define EXT3_FT_SOCK 6
633 #define EXT3_FT_SYMLINK 7
635 #define EXT3_FT_MAX 8
638 * EXT3_DIR_PAD defines the directory entries boundaries
640 * NOTE: It must be a multiple of 4
642 #define EXT3_DIR_PAD 4
643 #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
644 #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
647 * Hash Tree Directory indexing
648 * (c) Daniel Phillips, 2001
651 #ifdef CONFIG_EXT3_INDEX
652 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
653 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
654 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
655 #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
656 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
659 #define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
660 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
663 /* Legal values for the dx_root hash_version field: */
665 #define DX_HASH_LEGACY 0
666 #define DX_HASH_HALF_MD4 1
667 #define DX_HASH_TEA 2
671 /* hash info structure used by the directory hash */
680 #define EXT3_HTREE_EOF 0x7fffffff
683 * Control parameters used by ext3_htree_next_block
685 #define HASH_NB_ALWAYS 1
689 * Describe an inode's exact location on disk and in memory
693 struct buffer_head
*bh
;
694 unsigned long offset
;
695 unsigned long block_group
;
698 static inline struct ext3_inode
*ext3_raw_inode(struct ext3_iloc
*iloc
)
700 return (struct ext3_inode
*) (iloc
->bh
->b_data
+ iloc
->offset
);
704 * This structure is stuffed into the struct file's private_data field
705 * for directories. It is where we put information so that we can do
706 * readdir operations in hash tree order.
708 struct dir_private_info
{
710 struct rb_node
*curr_node
;
711 struct fname
*extra_fname
;
714 __u32 curr_minor_hash
;
718 /* calculate the first block number of the group */
719 static inline ext3_fsblk_t
720 ext3_group_first_block_no(struct super_block
*sb
, unsigned long group_no
)
722 return group_no
* (ext3_fsblk_t
)EXT3_BLOCKS_PER_GROUP(sb
) +
723 le32_to_cpu(EXT3_SB(sb
)->s_es
->s_first_data_block
);
727 * Special error return code only used by dx_probe() and its callers.
729 #define ERR_BAD_DX_DIR -75000
732 * Function prototypes
736 * Ok, these declarations are also in <linux/kernel.h> but none of the
737 * ext3 source programs needs to include it so they are duplicated here.
739 # define NORET_TYPE /**/
740 # define ATTRIB_NORET __attribute__((noreturn))
741 # define NORET_AND noreturn,
744 extern int ext3_bg_has_super(struct super_block
*sb
, int group
);
745 extern unsigned long ext3_bg_num_gdb(struct super_block
*sb
, int group
);
746 extern ext3_fsblk_t
ext3_new_block (handle_t
*handle
, struct inode
*inode
,
747 ext3_fsblk_t goal
, int *errp
);
748 extern ext3_fsblk_t
ext3_new_blocks (handle_t
*handle
, struct inode
*inode
,
749 ext3_fsblk_t goal
, unsigned long *count
, int *errp
);
750 extern void ext3_free_blocks (handle_t
*handle
, struct inode
*inode
,
751 ext3_fsblk_t block
, unsigned long count
);
752 extern void ext3_free_blocks_sb (handle_t
*handle
, struct super_block
*sb
,
753 ext3_fsblk_t block
, unsigned long count
,
754 unsigned long *pdquot_freed_blocks
);
755 extern ext3_fsblk_t
ext3_count_free_blocks (struct super_block
*);
756 extern void ext3_check_blocks_bitmap (struct super_block
*);
757 extern struct ext3_group_desc
* ext3_get_group_desc(struct super_block
* sb
,
758 unsigned int block_group
,
759 struct buffer_head
** bh
);
760 extern int ext3_should_retry_alloc(struct super_block
*sb
, int *retries
);
761 extern void ext3_init_block_alloc_info(struct inode
*);
762 extern void ext3_rsv_window_add(struct super_block
*sb
, struct ext3_reserve_window_node
*rsv
);
765 extern int ext3_check_dir_entry(const char *, struct inode
*,
766 struct ext3_dir_entry_2
*,
767 struct buffer_head
*, unsigned long);
768 extern int ext3_htree_store_dirent(struct file
*dir_file
, __u32 hash
,
770 struct ext3_dir_entry_2
*dirent
);
771 extern void ext3_htree_free_dir_info(struct dir_private_info
*p
);
774 extern int ext3_sync_file (struct file
*, struct dentry
*, int);
777 extern int ext3fs_dirhash(const char *name
, int len
, struct
778 dx_hash_info
*hinfo
);
781 extern struct inode
* ext3_new_inode (handle_t
*, struct inode
*, int);
782 extern void ext3_free_inode (handle_t
*, struct inode
*);
783 extern struct inode
* ext3_orphan_get (struct super_block
*, unsigned long);
784 extern unsigned long ext3_count_free_inodes (struct super_block
*);
785 extern unsigned long ext3_count_dirs (struct super_block
*);
786 extern void ext3_check_inodes_bitmap (struct super_block
*);
787 extern unsigned long ext3_count_free (struct buffer_head
*, unsigned);
791 int ext3_forget(handle_t
*handle
, int is_metadata
, struct inode
*inode
,
792 struct buffer_head
*bh
, ext3_fsblk_t blocknr
);
793 struct buffer_head
* ext3_getblk (handle_t
*, struct inode
*, long, int, int *);
794 struct buffer_head
* ext3_bread (handle_t
*, struct inode
*, int, int, int *);
795 int ext3_get_blocks_handle(handle_t
*handle
, struct inode
*inode
,
796 sector_t iblock
, unsigned long maxblocks
, struct buffer_head
*bh_result
,
797 int create
, int extend_disksize
);
799 extern void ext3_read_inode (struct inode
*);
800 extern int ext3_write_inode (struct inode
*, int);
801 extern int ext3_setattr (struct dentry
*, struct iattr
*);
802 extern void ext3_delete_inode (struct inode
*);
803 extern int ext3_sync_inode (handle_t
*, struct inode
*);
804 extern void ext3_discard_reservation (struct inode
*);
805 extern void ext3_dirty_inode(struct inode
*);
806 extern int ext3_change_inode_journal_flag(struct inode
*, int);
807 extern int ext3_get_inode_loc(struct inode
*, struct ext3_iloc
*);
808 extern void ext3_truncate (struct inode
*);
809 extern void ext3_set_inode_flags(struct inode
*);
810 extern void ext3_set_aops(struct inode
*inode
);
813 extern int ext3_ioctl (struct inode
*, struct file
*, unsigned int,
817 extern int ext3_orphan_add(handle_t
*, struct inode
*);
818 extern int ext3_orphan_del(handle_t
*, struct inode
*);
819 extern int ext3_htree_fill_tree(struct file
*dir_file
, __u32 start_hash
,
820 __u32 start_minor_hash
, __u32
*next_hash
);
823 extern int ext3_group_add(struct super_block
*sb
,
824 struct ext3_new_group_data
*input
);
825 extern int ext3_group_extend(struct super_block
*sb
,
826 struct ext3_super_block
*es
,
827 ext3_fsblk_t n_blocks_count
);
830 extern void ext3_error (struct super_block
*, const char *, const char *, ...)
831 __attribute__ ((format (printf
, 3, 4)));
832 extern void __ext3_std_error (struct super_block
*, const char *, int);
833 extern void ext3_abort (struct super_block
*, const char *, const char *, ...)
834 __attribute__ ((format (printf
, 3, 4)));
835 extern void ext3_warning (struct super_block
*, const char *, const char *, ...)
836 __attribute__ ((format (printf
, 3, 4)));
837 extern void ext3_update_dynamic_rev (struct super_block
*sb
);
839 #define ext3_std_error(sb, errno) \
842 __ext3_std_error((sb), __FUNCTION__, (errno)); \
846 * Inodes and files operations
850 extern const struct file_operations ext3_dir_operations
;
853 extern struct inode_operations ext3_file_inode_operations
;
854 extern const struct file_operations ext3_file_operations
;
857 extern struct inode_operations ext3_dir_inode_operations
;
858 extern struct inode_operations ext3_special_inode_operations
;
861 extern struct inode_operations ext3_symlink_inode_operations
;
862 extern struct inode_operations ext3_fast_symlink_inode_operations
;
865 #endif /* __KERNEL__ */
867 #endif /* _LINUX_EXT3_FS_H */