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
43 #define ext3_debug(f, a...) \
45 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
46 __FILE__, __LINE__, __func__); \
47 printk (KERN_DEBUG f, ## a); \
50 #define ext3_debug(f, a...) do {} while (0)
54 * Special inodes numbers
56 #define EXT3_BAD_INO 1 /* Bad blocks inode */
57 #define EXT3_ROOT_INO 2 /* Root inode */
58 #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
59 #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
60 #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
61 #define EXT3_JOURNAL_INO 8 /* Journal inode */
63 /* First non-reserved inode for old ext3 filesystems */
64 #define EXT3_GOOD_OLD_FIRST_INO 11
67 * Maximal count of links to a file
69 #define EXT3_LINK_MAX 32000
72 * Macro-instructions used to manage several block sizes
74 #define EXT3_MIN_BLOCK_SIZE 1024
75 #define EXT3_MAX_BLOCK_SIZE 65536
76 #define EXT3_MIN_BLOCK_LOG_SIZE 10
78 # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
80 # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
82 #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
84 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
86 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
89 #define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
90 #define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
91 #define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
93 #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
94 EXT3_GOOD_OLD_INODE_SIZE : \
96 #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
97 EXT3_GOOD_OLD_FIRST_INO : \
102 * Macro-instructions used to manage fragments
104 #define EXT3_MIN_FRAG_SIZE 1024
105 #define EXT3_MAX_FRAG_SIZE 4096
106 #define EXT3_MIN_FRAG_LOG_SIZE 10
108 # define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
109 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
111 # define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
112 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
116 * Structure of a blocks group descriptor
118 struct ext3_group_desc
120 __le32 bg_block_bitmap
; /* Blocks bitmap block */
121 __le32 bg_inode_bitmap
; /* Inodes bitmap block */
122 __le32 bg_inode_table
; /* Inodes table block */
123 __le16 bg_free_blocks_count
; /* Free blocks count */
124 __le16 bg_free_inodes_count
; /* Free inodes count */
125 __le16 bg_used_dirs_count
; /* Directories count */
127 __le32 bg_reserved
[3];
131 * Macro-instructions used to manage group descriptors
134 # define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
135 # define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
136 # define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
137 # define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
139 # define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
140 # define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
141 # define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
145 * Constants relative to the data blocks
147 #define EXT3_NDIR_BLOCKS 12
148 #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
149 #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
150 #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
151 #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
156 #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
157 #define EXT3_UNRM_FL 0x00000002 /* Undelete */
158 #define EXT3_COMPR_FL 0x00000004 /* Compress file */
159 #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
160 #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
161 #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
162 #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
163 #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
164 /* Reserved for compression usage... */
165 #define EXT3_DIRTY_FL 0x00000100
166 #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
167 #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
168 #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
169 /* End compression flags --- maybe not all used */
170 #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
171 #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
172 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
173 #define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
174 #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
175 #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
176 #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
178 #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
179 #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
181 /* Flags that should be inherited by new inodes from their parent. */
182 #define EXT3_FL_INHERITED (EXT3_SECRM_FL | EXT3_UNRM_FL | EXT3_COMPR_FL |\
183 EXT3_SYNC_FL | EXT3_IMMUTABLE_FL | EXT3_APPEND_FL |\
184 EXT3_NODUMP_FL | EXT3_NOATIME_FL | EXT3_COMPRBLK_FL|\
185 EXT3_NOCOMPR_FL | EXT3_JOURNAL_DATA_FL |\
186 EXT3_NOTAIL_FL | EXT3_DIRSYNC_FL)
188 /* Flags that are appropriate for regular files (all but dir-specific ones). */
189 #define EXT3_REG_FLMASK (~(EXT3_DIRSYNC_FL | EXT3_TOPDIR_FL))
191 /* Flags that are appropriate for non-directories/regular files. */
192 #define EXT3_OTHER_FLMASK (EXT3_NODUMP_FL | EXT3_NOATIME_FL)
194 /* Mask out flags that are inappropriate for the given type of inode. */
195 static inline __u32
ext3_mask_flags(umode_t mode
, __u32 flags
)
199 else if (S_ISREG(mode
))
200 return flags
& EXT3_REG_FLMASK
;
202 return flags
& EXT3_OTHER_FLMASK
;
205 /* Used to pass group descriptor data when online resize is done */
206 struct ext3_new_group_input
{
207 __u32 group
; /* Group number for this data */
208 __u32 block_bitmap
; /* Absolute block number of block bitmap */
209 __u32 inode_bitmap
; /* Absolute block number of inode bitmap */
210 __u32 inode_table
; /* Absolute block number of inode table start */
211 __u32 blocks_count
; /* Total number of blocks in this group */
212 __u16 reserved_blocks
; /* Number of reserved blocks in this group */
216 /* The struct ext3_new_group_input in kernel space, with free_blocks_count */
217 struct ext3_new_group_data
{
223 __u16 reserved_blocks
;
225 __u32 free_blocks_count
;
232 #define EXT3_IOC_GETFLAGS FS_IOC_GETFLAGS
233 #define EXT3_IOC_SETFLAGS FS_IOC_SETFLAGS
234 #define EXT3_IOC_GETVERSION _IOR('f', 3, long)
235 #define EXT3_IOC_SETVERSION _IOW('f', 4, long)
236 #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
237 #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
238 #define EXT3_IOC_GETVERSION_OLD FS_IOC_GETVERSION
239 #define EXT3_IOC_SETVERSION_OLD FS_IOC_SETVERSION
240 #ifdef CONFIG_JBD_DEBUG
241 #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
243 #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
244 #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
247 * ioctl commands in 32 bit emulation
249 #define EXT3_IOC32_GETFLAGS FS_IOC32_GETFLAGS
250 #define EXT3_IOC32_SETFLAGS FS_IOC32_SETFLAGS
251 #define EXT3_IOC32_GETVERSION _IOR('f', 3, int)
252 #define EXT3_IOC32_SETVERSION _IOW('f', 4, int)
253 #define EXT3_IOC32_GETRSVSZ _IOR('f', 5, int)
254 #define EXT3_IOC32_SETRSVSZ _IOW('f', 6, int)
255 #define EXT3_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
256 #ifdef CONFIG_JBD_DEBUG
257 #define EXT3_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int)
259 #define EXT3_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
260 #define EXT3_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
266 struct ext3_mount_options
{
267 unsigned long s_mount_opt
;
270 unsigned long s_commit_interval
;
273 char *s_qf_names
[MAXQUOTAS
];
278 * Structure of an inode on the disk
281 __le16 i_mode
; /* File mode */
282 __le16 i_uid
; /* Low 16 bits of Owner Uid */
283 __le32 i_size
; /* Size in bytes */
284 __le32 i_atime
; /* Access time */
285 __le32 i_ctime
; /* Creation time */
286 __le32 i_mtime
; /* Modification time */
287 __le32 i_dtime
; /* Deletion Time */
288 __le16 i_gid
; /* Low 16 bits of Group Id */
289 __le16 i_links_count
; /* Links count */
290 __le32 i_blocks
; /* Blocks count */
291 __le32 i_flags
; /* File flags */
297 __u32 h_i_translator
;
302 } osd1
; /* OS dependent 1 */
303 __le32 i_block
[EXT3_N_BLOCKS
];/* Pointers to blocks */
304 __le32 i_generation
; /* File version (for NFS) */
305 __le32 i_file_acl
; /* File ACL */
306 __le32 i_dir_acl
; /* Directory ACL */
307 __le32 i_faddr
; /* Fragment address */
310 __u8 l_i_frag
; /* Fragment number */
311 __u8 l_i_fsize
; /* Fragment size */
313 __le16 l_i_uid_high
; /* these 2 fields */
314 __le16 l_i_gid_high
; /* were reserved2[0] */
318 __u8 h_i_frag
; /* Fragment number */
319 __u8 h_i_fsize
; /* Fragment size */
326 __u8 m_i_frag
; /* Fragment number */
327 __u8 m_i_fsize
; /* Fragment size */
329 __u32 m_i_reserved2
[2];
331 } osd2
; /* OS dependent 2 */
332 __le16 i_extra_isize
;
336 #define i_size_high i_dir_acl
338 #if defined(__KERNEL__) || defined(__linux__)
339 #define i_reserved1 osd1.linux1.l_i_reserved1
340 #define i_frag osd2.linux2.l_i_frag
341 #define i_fsize osd2.linux2.l_i_fsize
342 #define i_uid_low i_uid
343 #define i_gid_low i_gid
344 #define i_uid_high osd2.linux2.l_i_uid_high
345 #define i_gid_high osd2.linux2.l_i_gid_high
346 #define i_reserved2 osd2.linux2.l_i_reserved2
348 #elif defined(__GNU__)
350 #define i_translator osd1.hurd1.h_i_translator
351 #define i_frag osd2.hurd2.h_i_frag;
352 #define i_fsize osd2.hurd2.h_i_fsize;
353 #define i_uid_high osd2.hurd2.h_i_uid_high
354 #define i_gid_high osd2.hurd2.h_i_gid_high
355 #define i_author osd2.hurd2.h_i_author
357 #elif defined(__masix__)
359 #define i_reserved1 osd1.masix1.m_i_reserved1
360 #define i_frag osd2.masix2.m_i_frag
361 #define i_fsize osd2.masix2.m_i_fsize
362 #define i_reserved2 osd2.masix2.m_i_reserved2
364 #endif /* defined(__KERNEL__) || defined(__linux__) */
369 #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
370 #define EXT3_ERROR_FS 0x0002 /* Errors detected */
371 #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
374 * Misc. filesystem flags
376 #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */
377 #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */
378 #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */
383 #define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */
384 #define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
385 #define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */
386 #define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */
387 #define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
388 #define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
389 #define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
390 #define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
391 #define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
392 #define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */
393 #define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
394 #define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
395 #define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
396 #define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
397 #define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
398 #define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
399 #define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
400 #define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
401 #define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
402 #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
403 #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
404 #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
405 #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
406 #define EXT3_MOUNT_DATA_ERR_ABORT 0x400000 /* Abort on file data write
407 * error in ordered mode */
409 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
410 #ifndef _LINUX_EXT2_FS_H
411 #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
412 #define set_opt(o, opt) o |= EXT3_MOUNT_##opt
413 #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
416 #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
417 #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
418 #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
421 #define ext3_set_bit __test_and_set_bit_le
422 #define ext3_set_bit_atomic ext2_set_bit_atomic
423 #define ext3_clear_bit __test_and_clear_bit_le
424 #define ext3_clear_bit_atomic ext2_clear_bit_atomic
425 #define ext3_test_bit test_bit_le
426 #define ext3_find_first_zero_bit find_first_zero_bit_le
427 #define ext3_find_next_zero_bit find_next_zero_bit_le
430 * Maximal mount counts between two filesystem checks
432 #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
433 #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
436 * Behaviour when detecting errors
438 #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
439 #define EXT3_ERRORS_RO 2 /* Remount fs read-only */
440 #define EXT3_ERRORS_PANIC 3 /* Panic */
441 #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
444 * Structure of the super block
446 struct ext3_super_block
{
447 /*00*/ __le32 s_inodes_count
; /* Inodes count */
448 __le32 s_blocks_count
; /* Blocks count */
449 __le32 s_r_blocks_count
; /* Reserved blocks count */
450 __le32 s_free_blocks_count
; /* Free blocks count */
451 /*10*/ __le32 s_free_inodes_count
; /* Free inodes count */
452 __le32 s_first_data_block
; /* First Data Block */
453 __le32 s_log_block_size
; /* Block size */
454 __le32 s_log_frag_size
; /* Fragment size */
455 /*20*/ __le32 s_blocks_per_group
; /* # Blocks per group */
456 __le32 s_frags_per_group
; /* # Fragments per group */
457 __le32 s_inodes_per_group
; /* # Inodes per group */
458 __le32 s_mtime
; /* Mount time */
459 /*30*/ __le32 s_wtime
; /* Write time */
460 __le16 s_mnt_count
; /* Mount count */
461 __le16 s_max_mnt_count
; /* Maximal mount count */
462 __le16 s_magic
; /* Magic signature */
463 __le16 s_state
; /* File system state */
464 __le16 s_errors
; /* Behaviour when detecting errors */
465 __le16 s_minor_rev_level
; /* minor revision level */
466 /*40*/ __le32 s_lastcheck
; /* time of last check */
467 __le32 s_checkinterval
; /* max. time between checks */
468 __le32 s_creator_os
; /* OS */
469 __le32 s_rev_level
; /* Revision level */
470 /*50*/ __le16 s_def_resuid
; /* Default uid for reserved blocks */
471 __le16 s_def_resgid
; /* Default gid for reserved blocks */
473 * These fields are for EXT3_DYNAMIC_REV superblocks only.
475 * Note: the difference between the compatible feature set and
476 * the incompatible feature set is that if there is a bit set
477 * in the incompatible feature set that the kernel doesn't
478 * know about, it should refuse to mount the filesystem.
480 * e2fsck's requirements are more strict; if it doesn't know
481 * about a feature in either the compatible or incompatible
482 * feature set, it must abort and not try to meddle with
483 * things it doesn't understand...
485 __le32 s_first_ino
; /* First non-reserved inode */
486 __le16 s_inode_size
; /* size of inode structure */
487 __le16 s_block_group_nr
; /* block group # of this superblock */
488 __le32 s_feature_compat
; /* compatible feature set */
489 /*60*/ __le32 s_feature_incompat
; /* incompatible feature set */
490 __le32 s_feature_ro_compat
; /* readonly-compatible feature set */
491 /*68*/ __u8 s_uuid
[16]; /* 128-bit uuid for volume */
492 /*78*/ char s_volume_name
[16]; /* volume name */
493 /*88*/ char s_last_mounted
[64]; /* directory where last mounted */
494 /*C8*/ __le32 s_algorithm_usage_bitmap
; /* For compression */
496 * Performance hints. Directory preallocation should only
497 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
499 __u8 s_prealloc_blocks
; /* Nr of blocks to try to preallocate*/
500 __u8 s_prealloc_dir_blocks
; /* Nr to preallocate for dirs */
501 __le16 s_reserved_gdt_blocks
; /* Per group desc for online growth */
503 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
505 /*D0*/ __u8 s_journal_uuid
[16]; /* uuid of journal superblock */
506 /*E0*/ __le32 s_journal_inum
; /* inode number of journal file */
507 __le32 s_journal_dev
; /* device number of journal file */
508 __le32 s_last_orphan
; /* start of list of inodes to delete */
509 __le32 s_hash_seed
[4]; /* HTREE hash seed */
510 __u8 s_def_hash_version
; /* Default hash version to use */
511 __u8 s_reserved_char_pad
;
512 __u16 s_reserved_word_pad
;
513 __le32 s_default_mount_opts
;
514 __le32 s_first_meta_bg
; /* First metablock block group */
515 __le32 s_mkfs_time
; /* When the filesystem was created */
516 __le32 s_jnl_blocks
[17]; /* Backup of the journal inode */
517 /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
518 /*150*/ __le32 s_blocks_count_hi
; /* Blocks count */
519 __le32 s_r_blocks_count_hi
; /* Reserved blocks count */
520 __le32 s_free_blocks_count_hi
; /* Free blocks count */
521 __le16 s_min_extra_isize
; /* All inodes have at least # bytes */
522 __le16 s_want_extra_isize
; /* New inodes should reserve # bytes */
523 __le32 s_flags
; /* Miscellaneous flags */
524 __le16 s_raid_stride
; /* RAID stride */
525 __le16 s_mmp_interval
; /* # seconds to wait in MMP checking */
526 __le64 s_mmp_block
; /* Block for multi-mount protection */
527 __le32 s_raid_stripe_width
; /* blocks on all data disks (N*stride)*/
528 __u8 s_log_groups_per_flex
; /* FLEX_BG group size */
529 __u8 s_reserved_char_pad2
;
530 __le16 s_reserved_pad
;
531 __u32 s_reserved
[162]; /* Padding to the end of the block */
535 #include <linux/ext3_fs_i.h>
536 #include <linux/ext3_fs_sb.h>
537 static inline struct ext3_sb_info
* EXT3_SB(struct super_block
*sb
)
539 return sb
->s_fs_info
;
541 static inline struct ext3_inode_info
*EXT3_I(struct inode
*inode
)
543 return container_of(inode
, struct ext3_inode_info
, vfs_inode
);
546 static inline int ext3_valid_inum(struct super_block
*sb
, unsigned long ino
)
548 return ino
== EXT3_ROOT_INO
||
549 ino
== EXT3_JOURNAL_INO
||
550 ino
== EXT3_RESIZE_INO
||
551 (ino
>= EXT3_FIRST_INO(sb
) &&
552 ino
<= le32_to_cpu(EXT3_SB(sb
)->s_es
->s_inodes_count
));
556 * Inode dynamic state flags
559 EXT3_STATE_JDATA
, /* journaled data exists */
560 EXT3_STATE_NEW
, /* inode is newly created */
561 EXT3_STATE_XATTR
, /* has in-inode xattrs */
562 EXT3_STATE_FLUSH_ON_CLOSE
, /* flush dirty pages on close */
565 static inline int ext3_test_inode_state(struct inode
*inode
, int bit
)
567 return test_bit(bit
, &EXT3_I(inode
)->i_state_flags
);
570 static inline void ext3_set_inode_state(struct inode
*inode
, int bit
)
572 set_bit(bit
, &EXT3_I(inode
)->i_state_flags
);
575 static inline void ext3_clear_inode_state(struct inode
*inode
, int bit
)
577 clear_bit(bit
, &EXT3_I(inode
)->i_state_flags
);
580 /* Assume that user mode programs are passing in an ext3fs superblock, not
581 * a kernel struct super_block. This will allow us to call the feature-test
582 * macros from user land. */
583 #define EXT3_SB(sb) (sb)
586 #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
589 * Codes for operating systems
591 #define EXT3_OS_LINUX 0
592 #define EXT3_OS_HURD 1
593 #define EXT3_OS_MASIX 2
594 #define EXT3_OS_FREEBSD 3
595 #define EXT3_OS_LITES 4
600 #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
601 #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
603 #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
604 #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
606 #define EXT3_GOOD_OLD_INODE_SIZE 128
609 * Feature set definitions
612 #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
613 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
614 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
615 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
616 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
617 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
618 #define EXT3_SET_COMPAT_FEATURE(sb,mask) \
619 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
620 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
621 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
622 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
623 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
624 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
625 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
626 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
627 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
628 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
629 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
631 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
632 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
633 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
634 #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
635 #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
636 #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
638 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
639 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
640 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
642 #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
643 #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
644 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
645 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
646 #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
648 #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
649 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
650 EXT3_FEATURE_INCOMPAT_RECOVER| \
651 EXT3_FEATURE_INCOMPAT_META_BG)
652 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
653 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
654 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
657 * Default values for user and/or group using reserved blocks
659 #define EXT3_DEF_RESUID 0
660 #define EXT3_DEF_RESGID 0
663 * Default mount options
665 #define EXT3_DEFM_DEBUG 0x0001
666 #define EXT3_DEFM_BSDGROUPS 0x0002
667 #define EXT3_DEFM_XATTR_USER 0x0004
668 #define EXT3_DEFM_ACL 0x0008
669 #define EXT3_DEFM_UID16 0x0010
670 #define EXT3_DEFM_JMODE 0x0060
671 #define EXT3_DEFM_JMODE_DATA 0x0020
672 #define EXT3_DEFM_JMODE_ORDERED 0x0040
673 #define EXT3_DEFM_JMODE_WBACK 0x0060
676 * Structure of a directory entry
678 #define EXT3_NAME_LEN 255
680 struct ext3_dir_entry
{
681 __le32 inode
; /* Inode number */
682 __le16 rec_len
; /* Directory entry length */
683 __le16 name_len
; /* Name length */
684 char name
[EXT3_NAME_LEN
]; /* File name */
688 * The new version of the directory entry. Since EXT3 structures are
689 * stored in intel byte order, and the name_len field could never be
690 * bigger than 255 chars, it's safe to reclaim the extra byte for the
693 struct ext3_dir_entry_2
{
694 __le32 inode
; /* Inode number */
695 __le16 rec_len
; /* Directory entry length */
696 __u8 name_len
; /* Name length */
698 char name
[EXT3_NAME_LEN
]; /* File name */
702 * Ext3 directory file types. Only the low 3 bits are used. The
703 * other bits are reserved for now.
705 #define EXT3_FT_UNKNOWN 0
706 #define EXT3_FT_REG_FILE 1
707 #define EXT3_FT_DIR 2
708 #define EXT3_FT_CHRDEV 3
709 #define EXT3_FT_BLKDEV 4
710 #define EXT3_FT_FIFO 5
711 #define EXT3_FT_SOCK 6
712 #define EXT3_FT_SYMLINK 7
714 #define EXT3_FT_MAX 8
717 * EXT3_DIR_PAD defines the directory entries boundaries
719 * NOTE: It must be a multiple of 4
721 #define EXT3_DIR_PAD 4
722 #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
723 #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
725 #define EXT3_MAX_REC_LEN ((1<<16)-1)
728 * Tests against MAX_REC_LEN etc were put in place for 64k block
729 * sizes; if that is not possible on this arch, we can skip
730 * those tests and speed things up.
732 static inline unsigned ext3_rec_len_from_disk(__le16 dlen
)
734 unsigned len
= le16_to_cpu(dlen
);
736 #if (PAGE_CACHE_SIZE >= 65536)
737 if (len
== EXT3_MAX_REC_LEN
)
743 static inline __le16
ext3_rec_len_to_disk(unsigned len
)
745 #if (PAGE_CACHE_SIZE >= 65536)
746 if (len
== (1 << 16))
747 return cpu_to_le16(EXT3_MAX_REC_LEN
);
748 else if (len
> (1 << 16))
751 return cpu_to_le16(len
);
755 * Hash Tree Directory indexing
756 * (c) Daniel Phillips, 2001
759 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
760 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
761 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
762 #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
763 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
765 /* Legal values for the dx_root hash_version field: */
767 #define DX_HASH_LEGACY 0
768 #define DX_HASH_HALF_MD4 1
769 #define DX_HASH_TEA 2
770 #define DX_HASH_LEGACY_UNSIGNED 3
771 #define DX_HASH_HALF_MD4_UNSIGNED 4
772 #define DX_HASH_TEA_UNSIGNED 5
776 /* hash info structure used by the directory hash */
785 #define EXT3_HTREE_EOF 0x7fffffff
788 * Control parameters used by ext3_htree_next_block
790 #define HASH_NB_ALWAYS 1
794 * Describe an inode's exact location on disk and in memory
798 struct buffer_head
*bh
;
799 unsigned long offset
;
800 unsigned long block_group
;
803 static inline struct ext3_inode
*ext3_raw_inode(struct ext3_iloc
*iloc
)
805 return (struct ext3_inode
*) (iloc
->bh
->b_data
+ iloc
->offset
);
809 * This structure is stuffed into the struct file's private_data field
810 * for directories. It is where we put information so that we can do
811 * readdir operations in hash tree order.
813 struct dir_private_info
{
815 struct rb_node
*curr_node
;
816 struct fname
*extra_fname
;
819 __u32 curr_minor_hash
;
823 /* calculate the first block number of the group */
824 static inline ext3_fsblk_t
825 ext3_group_first_block_no(struct super_block
*sb
, unsigned long group_no
)
827 return group_no
* (ext3_fsblk_t
)EXT3_BLOCKS_PER_GROUP(sb
) +
828 le32_to_cpu(EXT3_SB(sb
)->s_es
->s_first_data_block
);
832 * Special error return code only used by dx_probe() and its callers.
834 #define ERR_BAD_DX_DIR -75000
837 * Function prototypes
841 * Ok, these declarations are also in <linux/kernel.h> but none of the
842 * ext3 source programs needs to include it so they are duplicated here.
844 # define NORET_TYPE /**/
845 # define ATTRIB_NORET __attribute__((noreturn))
846 # define NORET_AND noreturn,
849 extern int ext3_bg_has_super(struct super_block
*sb
, int group
);
850 extern unsigned long ext3_bg_num_gdb(struct super_block
*sb
, int group
);
851 extern ext3_fsblk_t
ext3_new_block (handle_t
*handle
, struct inode
*inode
,
852 ext3_fsblk_t goal
, int *errp
);
853 extern ext3_fsblk_t
ext3_new_blocks (handle_t
*handle
, struct inode
*inode
,
854 ext3_fsblk_t goal
, unsigned long *count
, int *errp
);
855 extern void ext3_free_blocks (handle_t
*handle
, struct inode
*inode
,
856 ext3_fsblk_t block
, unsigned long count
);
857 extern void ext3_free_blocks_sb (handle_t
*handle
, struct super_block
*sb
,
858 ext3_fsblk_t block
, unsigned long count
,
859 unsigned long *pdquot_freed_blocks
);
860 extern ext3_fsblk_t
ext3_count_free_blocks (struct super_block
*);
861 extern void ext3_check_blocks_bitmap (struct super_block
*);
862 extern struct ext3_group_desc
* ext3_get_group_desc(struct super_block
* sb
,
863 unsigned int block_group
,
864 struct buffer_head
** bh
);
865 extern int ext3_should_retry_alloc(struct super_block
*sb
, int *retries
);
866 extern void ext3_init_block_alloc_info(struct inode
*);
867 extern void ext3_rsv_window_add(struct super_block
*sb
, struct ext3_reserve_window_node
*rsv
);
868 extern int ext3_trim_fs(struct super_block
*sb
, struct fstrim_range
*range
);
871 extern int ext3_check_dir_entry(const char *, struct inode
*,
872 struct ext3_dir_entry_2
*,
873 struct buffer_head
*, unsigned long);
874 extern int ext3_htree_store_dirent(struct file
*dir_file
, __u32 hash
,
876 struct ext3_dir_entry_2
*dirent
);
877 extern void ext3_htree_free_dir_info(struct dir_private_info
*p
);
880 extern int ext3_sync_file(struct file
*, int);
883 extern int ext3fs_dirhash(const char *name
, int len
, struct
884 dx_hash_info
*hinfo
);
887 extern struct inode
* ext3_new_inode (handle_t
*, struct inode
*,
888 const struct qstr
*, int);
889 extern void ext3_free_inode (handle_t
*, struct inode
*);
890 extern struct inode
* ext3_orphan_get (struct super_block
*, unsigned long);
891 extern unsigned long ext3_count_free_inodes (struct super_block
*);
892 extern unsigned long ext3_count_dirs (struct super_block
*);
893 extern void ext3_check_inodes_bitmap (struct super_block
*);
894 extern unsigned long ext3_count_free (struct buffer_head
*, unsigned);
898 int ext3_forget(handle_t
*handle
, int is_metadata
, struct inode
*inode
,
899 struct buffer_head
*bh
, ext3_fsblk_t blocknr
);
900 struct buffer_head
* ext3_getblk (handle_t
*, struct inode
*, long, int, int *);
901 struct buffer_head
* ext3_bread (handle_t
*, struct inode
*, int, int, int *);
902 int ext3_get_blocks_handle(handle_t
*handle
, struct inode
*inode
,
903 sector_t iblock
, unsigned long maxblocks
, struct buffer_head
*bh_result
,
906 extern struct inode
*ext3_iget(struct super_block
*, unsigned long);
907 extern int ext3_write_inode (struct inode
*, struct writeback_control
*);
908 extern int ext3_setattr (struct dentry
*, struct iattr
*);
909 extern void ext3_evict_inode (struct inode
*);
910 extern int ext3_sync_inode (handle_t
*, struct inode
*);
911 extern void ext3_discard_reservation (struct inode
*);
912 extern void ext3_dirty_inode(struct inode
*, int);
913 extern int ext3_change_inode_journal_flag(struct inode
*, int);
914 extern int ext3_get_inode_loc(struct inode
*, struct ext3_iloc
*);
915 extern int ext3_can_truncate(struct inode
*inode
);
916 extern void ext3_truncate (struct inode
*);
917 extern void ext3_set_inode_flags(struct inode
*);
918 extern void ext3_get_inode_flags(struct ext3_inode_info
*);
919 extern void ext3_set_aops(struct inode
*inode
);
920 extern int ext3_fiemap(struct inode
*inode
, struct fiemap_extent_info
*fieinfo
,
924 extern long ext3_ioctl(struct file
*, unsigned int, unsigned long);
925 extern long ext3_compat_ioctl(struct file
*, unsigned int, unsigned long);
928 extern int ext3_orphan_add(handle_t
*, struct inode
*);
929 extern int ext3_orphan_del(handle_t
*, struct inode
*);
930 extern int ext3_htree_fill_tree(struct file
*dir_file
, __u32 start_hash
,
931 __u32 start_minor_hash
, __u32
*next_hash
);
934 extern int ext3_group_add(struct super_block
*sb
,
935 struct ext3_new_group_data
*input
);
936 extern int ext3_group_extend(struct super_block
*sb
,
937 struct ext3_super_block
*es
,
938 ext3_fsblk_t n_blocks_count
);
941 extern void ext3_error (struct super_block
*, const char *, const char *, ...)
942 __attribute__ ((format (printf
, 3, 4)));
943 extern void __ext3_std_error (struct super_block
*, const char *, int);
944 extern void ext3_abort (struct super_block
*, const char *, const char *, ...)
945 __attribute__ ((format (printf
, 3, 4)));
946 extern void ext3_warning (struct super_block
*, const char *, const char *, ...)
947 __attribute__ ((format (printf
, 3, 4)));
948 extern void ext3_msg(struct super_block
*, const char *, const char *, ...)
949 __attribute__ ((format (printf
, 3, 4)));
950 extern void ext3_update_dynamic_rev (struct super_block
*sb
);
952 #define ext3_std_error(sb, errno) \
955 __ext3_std_error((sb), __func__, (errno)); \
959 * Inodes and files operations
963 extern const struct file_operations ext3_dir_operations
;
966 extern const struct inode_operations ext3_file_inode_operations
;
967 extern const struct file_operations ext3_file_operations
;
970 extern const struct inode_operations ext3_dir_inode_operations
;
971 extern const struct inode_operations ext3_special_inode_operations
;
974 extern const struct inode_operations ext3_symlink_inode_operations
;
975 extern const struct inode_operations ext3_fast_symlink_inode_operations
;
978 #endif /* __KERNEL__ */
980 #endif /* _LINUX_EXT3_FS_H */