2 * linux/include/linux/ext2_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 f(C) 1991, 1992 Linus Torvalds
16 #ifndef _LINUX_EXT2_FS_H
17 #define _LINUX_EXT2_FS_H
19 #include "types.h" /* Changed from linux/types.h */
22 * The second extended filesystem constants/structures
26 * Define EXT2FS_DEBUG to produce debug messages
31 * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files
33 #define EXT2_PREALLOCATE
34 #define EXT2_DEFAULT_PREALLOC_BLOCKS 8
37 * The second extended file system version
39 #define EXT2FS_DATE "95/08/09"
40 #define EXT2FS_VERSION "0.5b"
43 * Special inodes numbers
45 #define EXT2_BAD_INO 1 /* Bad blocks inode */
46 #define EXT2_ROOT_INO 2 /* Root inode */
47 #define EXT2_ACL_IDX_INO 3 /* ACL inode */
48 #define EXT2_ACL_DATA_INO 4 /* ACL inode */
49 #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
50 #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
51 #define EXT2_RESIZE_INO 7 /* Reserved group descriptors inode */
52 #define EXT2_JOURNAL_INO 8 /* Journal inode */
54 /* First non-reserved inode for old ext2 filesystems */
55 #define EXT2_GOOD_OLD_FIRST_INO 11
58 * The second extended file system magic number
60 #define EXT2_SUPER_MAGIC 0xEF53
63 * Maximal count of links to a file
65 #define EXT2_LINK_MAX 32000
68 * Macro-instructions used to manage several block sizes
70 #define EXT2_MIN_BLOCK_SIZE 1024
71 #define EXT2_MAX_BLOCK_SIZE 4096
72 #define EXT2_MIN_BLOCK_LOG_SIZE 10
74 # define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
76 # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
78 #define EXT2_ACLE_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_acl_entry))
79 #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
81 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
83 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
86 #define EXT2_ADDR_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_addr_per_block_bits)
87 #define EXT2_INODE_SIZE(s) ((s)->u.ext2_sb.s_inode_size)
88 #define EXT2_FIRST_INO(s) ((s)->u.ext2_sb.s_first_ino)
90 #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
91 EXT2_GOOD_OLD_INODE_SIZE : \
93 #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
94 EXT2_GOOD_OLD_FIRST_INO : \
99 * Macro-instructions used to manage fragments
101 #define EXT2_MIN_FRAG_SIZE 1024
102 #define EXT2_MAX_FRAG_SIZE 4096
103 #define EXT2_MIN_FRAG_LOG_SIZE 10
105 # define EXT2_FRAG_SIZE(s) ((s)->u.ext2_sb.s_frag_size)
106 # define EXT2_FRAGS_PER_BLOCK(s) ((s)->u.ext2_sb.s_frags_per_block)
108 # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
109 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
115 struct ext2_acl_header
/* Header of Access Control Lists */
118 __u32 aclh_file_count
;
119 __u32 aclh_acle_count
;
120 __u32 aclh_first_acle
;
123 struct ext2_acl_entry
/* Access Control List Entry */
126 __u16 acle_perms
; /* Access permissions */
127 __u16 acle_type
; /* Type of entry */
128 __u16 acle_tag
; /* User or group identity */
130 __u32 acle_next
; /* Pointer on next entry for the */
131 /* same inode or on next free entry */
135 * Structure of a blocks group descriptor
137 struct ext2_group_desc
139 __u32 bg_block_bitmap
; /* Blocks bitmap block */
140 __u32 bg_inode_bitmap
; /* Inodes bitmap block */
141 __u32 bg_inode_table
; /* Inodes table block */
142 __u16 bg_free_blocks_count
; /* Free blocks count */
143 __u16 bg_free_inodes_count
; /* Free inodes count */
144 __u16 bg_used_dirs_count
; /* Directories count */
146 __u32 bg_reserved
[3];
150 * Data structures used by the directory indexing feature
152 * Note: all of the multibyte integer fields are little endian.
156 * Note: dx_root_info is laid out so that if it should somehow get
157 * overlaid by a dirent the two low bits of the hash version will be
158 * zero. Therefore, the hash version mod 4 should never be 0.
159 * Sincerely, the paranoia department.
161 struct ext2_dx_root_info
{
163 __u8 hash_version
; /* 0 now, 1 at release */
164 __u8 info_length
; /* 8 */
165 __u8 indirect_levels
;
169 struct ext2_dx_entry
{
174 struct ext2_dx_countlimit
{
181 * Macro-instructions used to manage group descriptors
184 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->u.ext2_sb.s_blocks_per_group)
185 # define EXT2_DESC_PER_BLOCK(s) ((s)->u.ext2_sb.s_desc_per_block)
186 # define EXT2_INODES_PER_GROUP(s) ((s)->u.ext2_sb.s_inodes_per_group)
187 # define EXT2_DESC_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_desc_per_block_bits)
189 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
190 # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
191 # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
195 * Constants relative to the data blocks
197 #define EXT2_NDIR_BLOCKS 12
198 #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
199 #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
200 #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
201 #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
206 #define EXT2_SECRM_FL 0x00000001 /* Secure deletion */
207 #define EXT2_UNRM_FL 0x00000002 /* Undelete */
208 #define EXT2_COMPR_FL 0x00000004 /* Compress file */
209 #define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */
210 #define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */
211 #define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */
212 #define EXT2_NODUMP_FL 0x00000040 /* do not dump file */
213 #define EXT2_NOATIME_FL 0x00000080 /* do not update atime */
214 /* Reserved for compression usage... */
215 #define EXT2_DIRTY_FL 0x00000100
216 #define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
217 #define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */
218 #define EXT2_ECOMPR_FL 0x00000800 /* Compression error */
219 /* End compression flags --- maybe not all used */
220 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */
221 #define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */
222 #define EXT2_IMAGIC_FL 0x00002000
223 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
224 #define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */
225 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
227 #define EXT2_FL_USER_VISIBLE 0x0000DFFF /* User visible flags */
228 #define EXT2_FL_USER_MODIFIABLE 0x000080FF /* User modifiable flags */
233 #define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
234 #define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
235 #define EXT2_IOC_GETVERSION _IOR('v', 1, long)
236 #define EXT2_IOC_SETVERSION _IOW('v', 2, long)
239 * Structure of an inode on the disk
242 __u16 i_mode
; /* File mode */
243 __u16 i_uid
; /* Low 16 bits of Owner Uid */
244 __u32 i_size
; /* Size in bytes */
245 __u32 i_atime
; /* Access time */
246 __u32 i_ctime
; /* Creation time */
247 __u32 i_mtime
; /* Modification time */
248 __u32 i_dtime
; /* Deletion Time */
249 __u16 i_gid
; /* Low 16 bits of Group Id */
250 __u16 i_links_count
; /* Links count */
251 __u32 i_blocks
; /* Blocks count */
252 __u32 i_flags
; /* File flags */
258 __u32 h_i_translator
;
263 } osd1
; /* OS dependent 1 */
264 __u32 i_block
[EXT2_N_BLOCKS
];/* Pointers to blocks */
265 __u32 i_generation
; /* File version (for NFS) */
266 __u32 i_file_acl
; /* File ACL */
267 __u32 i_dir_acl
; /* Directory ACL */
268 __u32 i_faddr
; /* Fragment address */
271 __u8 l_i_frag
; /* Fragment number */
272 __u8 l_i_fsize
; /* Fragment size */
274 __u16 l_i_uid_high
; /* these 2 fields */
275 __u16 l_i_gid_high
; /* were reserved2[0] */
279 __u8 h_i_frag
; /* Fragment number */
280 __u8 h_i_fsize
; /* Fragment size */
287 __u8 m_i_frag
; /* Fragment number */
288 __u8 m_i_fsize
; /* Fragment size */
290 __u32 m_i_reserved2
[2];
292 } osd2
; /* OS dependent 2 */
295 #define i_size_high i_dir_acl
297 #if defined(__KERNEL__) || defined(__linux__)
298 #define i_reserved1 osd1.linux1.l_i_reserved1
299 #define i_frag osd2.linux2.l_i_frag
300 #define i_fsize osd2.linux2.l_i_fsize
301 #define i_uid_low i_uid
302 #define i_gid_low i_gid
303 #define i_uid_high osd2.linux2.l_i_uid_high
304 #define i_gid_high osd2.linux2.l_i_gid_high
305 #define i_reserved2 osd2.linux2.l_i_reserved2
307 #elif defined(__GNU__)
309 #define i_translator osd1.hurd1.h_i_translator
310 #define i_frag osd2.hurd2.h_i_frag;
311 #define i_fsize osd2.hurd2.h_i_fsize;
312 #define i_uid_high osd2.hurd2.h_i_uid_high
313 #define i_gid_high osd2.hurd2.h_i_gid_high
314 #define i_author osd2.hurd2.h_i_author
316 #elif defined(__masix__)
318 #define i_reserved1 osd1.masix1.m_i_reserved1
319 #define i_frag osd2.masix2.m_i_frag
320 #define i_fsize osd2.masix2.m_i_fsize
321 #define i_reserved2 osd2.masix2.m_i_reserved2
323 #endif /* defined(__KERNEL) || defined(__linux__) */
328 #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
329 #define EXT2_ERROR_FS 0x0002 /* Errors detected */
334 #define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
335 #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
336 #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
337 #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
338 #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
339 #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
340 #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
341 #define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
343 #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
344 #define set_opt(o, opt) o |= EXT2_MOUNT_##opt
345 #define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \
348 * Maximal mount counts between two filesystem checks
350 #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
351 #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
354 * Behaviour when detecting errors
356 #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
357 #define EXT2_ERRORS_RO 2 /* Remount fs read-only */
358 #define EXT2_ERRORS_PANIC 3 /* Panic */
359 #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
362 * Structure of the super block
364 struct ext2_super_block
{
365 __u32 s_inodes_count
; /* Inodes count */
366 __u32 s_blocks_count
; /* Blocks count */
367 __u32 s_r_blocks_count
; /* Reserved blocks count */
368 __u32 s_free_blocks_count
; /* Free blocks count */
369 __u32 s_free_inodes_count
; /* Free inodes count */
370 __u32 s_first_data_block
; /* First Data Block */
371 __u32 s_log_block_size
; /* Block size */
372 __s32 s_log_frag_size
; /* Fragment size */
373 __u32 s_blocks_per_group
; /* # Blocks per group */
374 __u32 s_frags_per_group
; /* # Fragments per group */
375 __u32 s_inodes_per_group
; /* # Inodes per group */
376 __u32 s_mtime
; /* Mount time */
377 __u32 s_wtime
; /* Write time */
378 __u16 s_mnt_count
; /* Mount count */
379 __s16 s_max_mnt_count
; /* Maximal mount count */
380 __u16 s_magic
; /* Magic signature */
381 __u16 s_state
; /* File system state */
382 __u16 s_errors
; /* Behaviour when detecting errors */
383 __u16 s_minor_rev_level
; /* minor revision level */
384 __u32 s_lastcheck
; /* time of last check */
385 __u32 s_checkinterval
; /* max. time between checks */
386 __u32 s_creator_os
; /* OS */
387 __u32 s_rev_level
; /* Revision level */
388 __u16 s_def_resuid
; /* Default uid for reserved blocks */
389 __u16 s_def_resgid
; /* Default gid for reserved blocks */
391 * These fields are for EXT2_DYNAMIC_REV superblocks only.
393 * Note: the difference between the compatible feature set and
394 * the incompatible feature set is that if there is a bit set
395 * in the incompatible feature set that the kernel doesn't
396 * know about, it should refuse to mount the filesystem.
398 * e2fsck's requirements are more strict; if it doesn't know
399 * about a feature in either the compatible or incompatible
400 * feature set, it must abort and not try to meddle with
401 * things it doesn't understand...
403 __u32 s_first_ino
; /* First non-reserved inode */
404 __u16 s_inode_size
; /* size of inode structure */
405 __u16 s_block_group_nr
; /* block group # of this superblock */
406 __u32 s_feature_compat
; /* compatible feature set */
407 __u32 s_feature_incompat
; /* incompatible feature set */
408 __u32 s_feature_ro_compat
; /* readonly-compatible feature set */
409 __u8 s_uuid
[16]; /* 128-bit uuid for volume */
410 char s_volume_name
[16]; /* volume name */
411 char s_last_mounted
[64]; /* directory where last mounted */
412 __u32 s_algorithm_usage_bitmap
; /* For compression */
414 * Performance hints. Directory preallocation should only
415 * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
417 __u8 s_prealloc_blocks
; /* Nr of blocks to try to preallocate*/
418 __u8 s_prealloc_dir_blocks
; /* Nr to preallocate for dirs */
421 * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
423 __u8 s_journal_uuid
[16]; /* uuid of journal superblock */
424 __u32 s_journal_inum
; /* inode number of journal file */
425 __u32 s_journal_dev
; /* device number of journal file */
426 __u32 s_last_orphan
; /* start of list of inodes to delete */
428 __u32 s_reserved
[197]; /* Padding to the end of the block */
432 #define EXT2_SB(sb) (&((sb)->u.ext2_sb))
434 /* Assume that user mode programs are passing in an ext2fs superblock, not
435 * a kernel struct super_block. This will allow us to call the feature-test
436 * macros from user land. */
437 #define EXT2_SB(sb) (sb)
441 * Codes for operating systems
443 #define EXT2_OS_LINUX 0
444 #define EXT2_OS_HURD 1
445 #define EXT2_OS_MASIX 2
446 #define EXT2_OS_FREEBSD 3
447 #define EXT2_OS_LITES 4
448 #define EXT2_OS_WINNT 5
453 #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
454 #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
456 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
457 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
459 #define EXT2_GOOD_OLD_INODE_SIZE 128
462 * Feature set definitions
465 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
466 ( EXT2_SB(sb)->s_feature_compat & (mask) )
467 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
468 ( EXT2_SB(sb)->s_feature_ro_compat & (mask) )
469 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
470 ( EXT2_SB(sb)->s_feature_incompat & (mask) )
472 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
473 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
474 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
475 #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
476 #define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010
477 #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
479 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
480 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
481 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
483 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
484 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
485 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
486 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
488 #define EXT2_FEATURE_COMPAT_SUPP 0
489 #define EXT2_FEATURE_INCOMPAT_SUPP EXT2_FEATURE_INCOMPAT_FILETYPE
490 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
491 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
492 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
495 * Default values for user and/or group using reserved blocks
497 #define EXT2_DEF_RESUID 0
498 #define EXT2_DEF_RESGID 0
501 * Structure of a directory entry
503 #define EXT2_NAME_LEN 255
505 struct ext2_dir_entry
{
506 __u32 inode
; /* Inode number */
507 __u16 rec_len
; /* Directory entry length */
508 __u16 name_len
; /* Name length */
509 char name
[EXT2_NAME_LEN
]; /* File name */
513 * The new version of the directory entry. Since EXT2 structures are
514 * stored in intel byte order, and the name_len field could never be
515 * bigger than 255 chars, it's safe to reclaim the extra byte for the
518 struct ext2_dir_entry_2
{
519 __u32 inode
; /* Inode number */
520 __u16 rec_len
; /* Directory entry length */
521 __u8 name_len
; /* Name length */
523 char name
[EXT2_NAME_LEN
]; /* File name */
527 * Ext2 directory file types. Only the low 3 bits are used. The
528 * other bits are reserved for now.
530 #define EXT2_FT_UNKNOWN 0
531 #define EXT2_FT_REG_FILE 1
532 #define EXT2_FT_DIR 2
533 #define EXT2_FT_CHRDEV 3
534 #define EXT2_FT_BLKDEV 4
535 #define EXT2_FT_FIFO 5
536 #define EXT2_FT_SOCK 6
537 #define EXT2_FT_SYMLINK 7
539 #define EXT2_FT_MAX 8
542 * EXT2_DIR_PAD defines the directory entries boundaries
544 * NOTE: It must be a multiple of 4
546 #define EXT2_DIR_PAD 4
547 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
548 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
553 * Function prototypes
557 * Ok, these declarations are also in <linux/kernel.h> but none of the
558 * ext2 source programs needs to include it so they are duplicated here.
560 # define NORET_TYPE /**/
561 # define ATTRIB_NORET __attribute__((noreturn))
562 # define NORET_AND noreturn,
565 extern int ext2_permission (struct inode
*, int);
568 extern int ext2_bg_has_super(struct super_block
*sb
, int group
);
569 extern unsigned long ext2_bg_num_gdb(struct super_block
*sb
, int group
);
570 extern int ext2_new_block (const struct inode
*, unsigned long,
571 __u32
*, __u32
*, int *);
572 extern void ext2_free_blocks (const struct inode
*, unsigned long,
574 extern unsigned long ext2_count_free_blocks (struct super_block
*);
575 extern void ext2_check_blocks_bitmap (struct super_block
*);
576 extern struct ext2_group_desc
* ext2_get_group_desc(struct super_block
* sb
,
577 unsigned int block_group
,
578 struct buffer_head
** bh
);
581 extern unsigned long ext2_count_free (struct buffer_head
*, unsigned);
584 extern int ext2_check_dir_entry (const char *, struct inode
*,
585 struct ext2_dir_entry_2
*, struct buffer_head
*,
589 extern int ext2_read (struct inode
*, struct file
*, char *, int);
590 extern int ext2_write (struct inode
*, struct file
*, char *, int);
593 extern int ext2_sync_file (struct file
*, struct dentry
*, int);
594 extern int ext2_fsync_inode (struct inode
*, int);
597 extern struct inode
* ext2_new_inode (const struct inode
*, int);
598 extern void ext2_free_inode (struct inode
*);
599 extern unsigned long ext2_count_free_inodes (struct super_block
*);
600 extern void ext2_check_inodes_bitmap (struct super_block
*);
604 extern struct buffer_head
* ext2_getblk (struct inode
*, long, int, int *);
605 extern struct buffer_head
* ext2_bread (struct inode
*, int, int, int *);
607 extern void ext2_read_inode (struct inode
*);
608 extern void ext2_write_inode (struct inode
*, int);
609 extern void ext2_put_inode (struct inode
*);
610 extern void ext2_delete_inode (struct inode
*);
611 extern int ext2_sync_inode (struct inode
*);
612 extern void ext2_discard_prealloc (struct inode
*);
615 extern int ext2_ioctl (struct inode
*, struct file
*, unsigned int,
619 extern struct inode_operations ext2_dir_inode_operations
;
622 extern void ext2_error (struct super_block
*, const char *, const char *, ...)
623 __attribute__ ((format (printf
, 3, 4)));
624 extern NORET_TYPE
void ext2_panic (struct super_block
*, const char *,
626 __attribute__ ((NORET_AND
format (printf
, 3, 4)));
627 extern void ext2_warning (struct super_block
*, const char *, const char *, ...)
628 __attribute__ ((format (printf
, 3, 4)));
629 extern void ext2_update_dynamic_rev (struct super_block
*sb
);
630 extern void ext2_put_super (struct super_block
*);
631 extern void ext2_write_super (struct super_block
*);
632 extern int ext2_remount (struct super_block
*, int *, char *);
633 extern struct super_block
* ext2_read_super (struct super_block
*,void *,int);
634 extern int ext2_statfs (struct super_block
*, struct statfs
*);
637 extern void ext2_truncate (struct inode
*);
640 * Inodes and files operations
644 extern struct file_operations ext2_dir_operations
;
647 extern struct inode_operations ext2_file_inode_operations
;
648 extern struct file_operations ext2_file_operations
;
651 extern struct inode_operations ext2_fast_symlink_inode_operations
;
653 extern struct address_space_operations ext2_aops
;
655 #endif /* __KERNEL__ */
657 #endif /* _LINUX_EXT2_FS_H */