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 (C) 1991, 1992 Linus Torvalds
16 #ifndef _LINUX_EXT2_FS_H
17 #define _LINUX_EXT2_FS_H
19 #include <asm/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 */
52 * 7 is reserved for EXT2_RESIZE_INO; was used for this in the past
53 * for the on-line resizing patches, but there is a better way of
54 * doing this which sct, andreas, and tytso discussed at the
55 * Filesystem/Storage Management Workshop in Miami (October, 2000).
57 #define EXT2_JOURNAL_INO 8 /* Journal inode */
59 /* First non-reserved inode for old ext2 filesystems */
60 #define EXT2_GOOD_OLD_FIRST_INO 11
63 * The second extended file system magic number
65 #define EXT2_SUPER_MAGIC 0xEF53
68 * Maximal count of links to a file
70 #define EXT2_LINK_MAX 32000
73 * Macro-instructions used to manage several block sizes
75 #define EXT2_MIN_BLOCK_SIZE 1024
76 #define EXT2_MAX_BLOCK_SIZE 4096
77 #define EXT2_MIN_BLOCK_LOG_SIZE 10
79 # define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
81 # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
83 #define EXT2_ACLE_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_acl_entry))
84 #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
86 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
88 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
91 #define EXT2_ADDR_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_addr_per_block_bits)
92 #define EXT2_INODE_SIZE(s) ((s)->u.ext2_sb.s_inode_size)
93 #define EXT2_FIRST_INO(s) ((s)->u.ext2_sb.s_first_ino)
95 #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
96 EXT2_GOOD_OLD_INODE_SIZE : \
98 #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
99 EXT2_GOOD_OLD_FIRST_INO : \
104 * Macro-instructions used to manage fragments
106 #define EXT2_MIN_FRAG_SIZE 1024
107 #define EXT2_MAX_FRAG_SIZE 4096
108 #define EXT2_MIN_FRAG_LOG_SIZE 10
110 # define EXT2_FRAG_SIZE(s) ((s)->u.ext2_sb.s_frag_size)
111 # define EXT2_FRAGS_PER_BLOCK(s) ((s)->u.ext2_sb.s_frags_per_block)
113 # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
114 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
120 struct ext2_acl_header /* Header of Access Control Lists */
123 __u32 aclh_file_count;
124 __u32 aclh_acle_count;
125 __u32 aclh_first_acle;
128 struct ext2_acl_entry /* Access Control List Entry */
131 __u16 acle_perms; /* Access permissions */
132 __u16 acle_type; /* Type of entry */
133 __u16 acle_tag; /* User or group identity */
135 __u32 acle_next; /* Pointer on next entry for the */
136 /* same inode or on next free entry */
140 * Structure of a blocks group descriptor
142 struct ext2_group_desc
144 __u32 bg_block_bitmap; /* Blocks bitmap block */
145 __u32 bg_inode_bitmap; /* Inodes bitmap block */
146 __u32 bg_inode_table; /* Inodes table block */
147 __u16 bg_free_blocks_count; /* Free blocks count */
148 __u16 bg_free_inodes_count; /* Free inodes count */
149 __u16 bg_used_dirs_count; /* Directories count */
151 __u32 bg_reserved[3];
155 * Macro-instructions used to manage group descriptors
158 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->u.ext2_sb.s_blocks_per_group)
159 # define EXT2_DESC_PER_BLOCK(s) ((s)->u.ext2_sb.s_desc_per_block)
160 # define EXT2_INODES_PER_GROUP(s) ((s)->u.ext2_sb.s_inodes_per_group)
161 # define EXT2_DESC_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_desc_per_block_bits)
163 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
164 # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
165 # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
169 * Constants relative to the data blocks
171 #define EXT2_NDIR_BLOCKS 12
172 #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
173 #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
174 #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
175 #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
180 #define EXT2_SECRM_FL 0x00000001 /* Secure deletion */
181 #define EXT2_UNRM_FL 0x00000002 /* Undelete */
182 #define EXT2_COMPR_FL 0x00000004 /* Compress file */
183 #define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */
184 #define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */
185 #define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */
186 #define EXT2_NODUMP_FL 0x00000040 /* do not dump file */
187 #define EXT2_NOATIME_FL 0x00000080 /* do not update atime */
188 /* Reserved for compression usage... */
189 #define EXT2_DIRTY_FL 0x00000100
190 #define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
191 #define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */
192 #define EXT2_ECOMPR_FL 0x00000800 /* Compression error */
193 /* End compression flags --- maybe not all used */
194 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */
195 #define EXT2_IMAGIC_FL 0x00002000
196 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
197 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
199 #define EXT2_FL_USER_VISIBLE 0x00005FFF /* User visible flags */
200 #define EXT2_FL_USER_MODIFIABLE 0x000000FF /* User modifiable flags */
205 #define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
206 #define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
207 #define EXT2_IOC_GETVERSION _IOR('v', 1, long)
208 #define EXT2_IOC_SETVERSION _IOW('v', 2, long)
211 * Structure of an inode on the disk
214 __u16 i_mode; /* File mode */
215 __u16 i_uid; /* Low 16 bits of Owner Uid */
216 __u32 i_size; /* Size in bytes */
217 __u32 i_atime; /* Access time */
218 __u32 i_ctime; /* Creation time */
219 __u32 i_mtime; /* Modification time */
220 __u32 i_dtime; /* Deletion Time */
221 __u16 i_gid; /* Low 16 bits of Group Id */
222 __u16 i_links_count; /* Links count */
223 __u32 i_blocks; /* Blocks count */
224 __u32 i_flags; /* File flags */
230 __u32 h_i_translator;
235 } osd1; /* OS dependent 1 */
236 __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
237 __u32 i_generation; /* File version (for NFS) */
238 __u32 i_file_acl; /* File ACL */
239 __u32 i_dir_acl; /* Directory ACL */
240 __u32 i_faddr; /* Fragment address */
243 __u8 l_i_frag; /* Fragment number */
244 __u8 l_i_fsize; /* Fragment size */
246 __u16 l_i_uid_high; /* these 2 fields */
247 __u16 l_i_gid_high; /* were reserved2[0] */
251 __u8 h_i_frag; /* Fragment number */
252 __u8 h_i_fsize; /* Fragment size */
259 __u8 m_i_frag; /* Fragment number */
260 __u8 m_i_fsize; /* Fragment size */
262 __u32 m_i_reserved2[2];
264 } osd2; /* OS dependent 2 */
267 #define i_size_high i_dir_acl
269 #if defined(__KERNEL__) || defined(__linux__)
270 #define i_reserved1 osd1.linux1.l_i_reserved1
271 #define i_frag osd2.linux2.l_i_frag
272 #define i_fsize osd2.linux2.l_i_fsize
273 #define i_uid_low i_uid
274 #define i_gid_low i_gid
275 #define i_uid_high osd2.linux2.l_i_uid_high
276 #define i_gid_high osd2.linux2.l_i_gid_high
277 #define i_reserved2 osd2.linux2.l_i_reserved2
279 #elif defined(__GNU__)
281 #define i_translator osd1.hurd1.h_i_translator
282 #define i_frag osd2.hurd2.h_i_frag;
283 #define i_fsize osd2.hurd2.h_i_fsize;
284 #define i_uid_high osd2.hurd2.h_i_uid_high
285 #define i_gid_high osd2.hurd2.h_i_gid_high
286 #define i_author osd2.hurd2.h_i_author
288 #elif defined(__masix__)
290 #define i_reserved1 osd1.masix1.m_i_reserved1
291 #define i_frag osd2.masix2.m_i_frag
292 #define i_fsize osd2.masix2.m_i_fsize
293 #define i_reserved2 osd2.masix2.m_i_reserved2
295 #endif /* defined(__KERNEL) || defined(__linux__) */
300 #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
301 #define EXT2_ERROR_FS 0x0002 /* Errors detected */
306 #define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
307 #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
308 #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
309 #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
310 #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
311 #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
312 #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
313 #define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
315 #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
316 #define set_opt(o, opt) o |= EXT2_MOUNT_##opt
317 #define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \
320 * Maximal mount counts between two filesystem checks
322 #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
323 #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
326 * Behaviour when detecting errors
328 #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
329 #define EXT2_ERRORS_RO 2 /* Remount fs read-only */
330 #define EXT2_ERRORS_PANIC 3 /* Panic */
331 #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
334 * Structure of the super block
336 struct ext2_super_block {
337 __u32 s_inodes_count; /* Inodes count */
338 __u32 s_blocks_count; /* Blocks count */
339 __u32 s_r_blocks_count; /* Reserved blocks count */
340 __u32 s_free_blocks_count; /* Free blocks count */
341 __u32 s_free_inodes_count; /* Free inodes count */
342 __u32 s_first_data_block; /* First Data Block */
343 __u32 s_log_block_size; /* Block size */
344 __s32 s_log_frag_size; /* Fragment size */
345 __u32 s_blocks_per_group; /* # Blocks per group */
346 __u32 s_frags_per_group; /* # Fragments per group */
347 __u32 s_inodes_per_group; /* # Inodes per group */
348 __u32 s_mtime; /* Mount time */
349 __u32 s_wtime; /* Write time */
350 __u16 s_mnt_count; /* Mount count */
351 __s16 s_max_mnt_count; /* Maximal mount count */
352 __u16 s_magic; /* Magic signature */
353 __u16 s_state; /* File system state */
354 __u16 s_errors; /* Behaviour when detecting errors */
355 __u16 s_minor_rev_level; /* minor revision level */
356 __u32 s_lastcheck; /* time of last check */
357 __u32 s_checkinterval; /* max. time between checks */
358 __u32 s_creator_os; /* OS */
359 __u32 s_rev_level; /* Revision level */
360 __u16 s_def_resuid; /* Default uid for reserved blocks */
361 __u16 s_def_resgid; /* Default gid for reserved blocks */
363 * These fields are for EXT2_DYNAMIC_REV superblocks only.
365 * Note: the difference between the compatible feature set and
366 * the incompatible feature set is that if there is a bit set
367 * in the incompatible feature set that the kernel doesn't
368 * know about, it should refuse to mount the filesystem.
370 * e2fsck's requirements are more strict; if it doesn't know
371 * about a feature in either the compatible or incompatible
372 * feature set, it must abort and not try to meddle with
373 * things it doesn't understand...
375 __u32 s_first_ino; /* First non-reserved inode */
376 __u16 s_inode_size; /* size of inode structure */
377 __u16 s_block_group_nr; /* block group # of this superblock */
378 __u32 s_feature_compat; /* compatible feature set */
379 __u32 s_feature_incompat; /* incompatible feature set */
380 __u32 s_feature_ro_compat; /* readonly-compatible feature set */
381 __u8 s_uuid[16]; /* 128-bit uuid for volume */
382 char s_volume_name[16]; /* volume name */
383 char s_last_mounted[64]; /* directory where last mounted */
384 __u32 s_algorithm_usage_bitmap; /* For compression */
386 * Performance hints. Directory preallocation should only
387 * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
389 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
390 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
393 * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
395 __u8 s_journal_uuid[16]; /* uuid of journal superblock */
396 __u32 s_journal_inum; /* inode number of journal file */
397 __u32 s_journal_dev; /* device number of journal file */
398 __u32 s_last_orphan; /* start of list of inodes to delete */
400 __u32 s_reserved[197]; /* Padding to the end of the block */
404 #define EXT2_SB(sb) (&((sb)->u.ext2_sb))
406 /* Assume that user mode programs are passing in an ext2fs superblock, not
407 * a kernel struct super_block. This will allow us to call the feature-test
408 * macros from user land. */
409 #define EXT2_SB(sb) (sb)
413 * Codes for operating systems
415 #define EXT2_OS_LINUX 0
416 #define EXT2_OS_HURD 1
417 #define EXT2_OS_MASIX 2
418 #define EXT2_OS_FREEBSD 3
419 #define EXT2_OS_LITES 4
424 #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
425 #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
427 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
428 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
430 #define EXT2_GOOD_OLD_INODE_SIZE 128
433 * Feature set definitions
436 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
437 ( EXT2_SB(sb)->s_feature_compat & (mask) )
438 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
439 ( EXT2_SB(sb)->s_feature_ro_compat & (mask) )
440 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
441 ( EXT2_SB(sb)->s_feature_incompat & (mask) )
443 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
444 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
445 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
447 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
448 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
449 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
451 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
452 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
453 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
454 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
456 #define EXT2_FEATURE_COMPAT_SUPP 0
457 #define EXT2_FEATURE_INCOMPAT_SUPP EXT2_FEATURE_INCOMPAT_FILETYPE
458 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
459 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
460 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
463 * Default values for user and/or group using reserved blocks
465 #define EXT2_DEF_RESUID 0
466 #define EXT2_DEF_RESGID 0
469 * Structure of a directory entry
471 #define EXT2_NAME_LEN 255
473 struct ext2_dir_entry {
474 __u32 inode; /* Inode number */
475 __u16 rec_len; /* Directory entry length */
476 __u16 name_len; /* Name length */
477 char name[EXT2_NAME_LEN]; /* File name */
481 * The new version of the directory entry. Since EXT2 structures are
482 * stored in intel byte order, and the name_len field could never be
483 * bigger than 255 chars, it's safe to reclaim the extra byte for the
486 struct ext2_dir_entry_2 {
487 __u32 inode; /* Inode number */
488 __u16 rec_len; /* Directory entry length */
489 __u8 name_len; /* Name length */
491 char name[EXT2_NAME_LEN]; /* File name */
495 * Ext2 directory file types. Only the low 3 bits are used. The
496 * other bits are reserved for now.
498 #define EXT2_FT_UNKNOWN 0
499 #define EXT2_FT_REG_FILE 1
500 #define EXT2_FT_DIR 2
501 #define EXT2_FT_CHRDEV 3
502 #define EXT2_FT_BLKDEV 4
503 #define EXT2_FT_FIFO 5
504 #define EXT2_FT_SOCK 6
505 #define EXT2_FT_SYMLINK 7
507 #define EXT2_FT_MAX 8
510 * EXT2_DIR_PAD defines the directory entries boundaries
512 * NOTE: It must be a multiple of 4
514 #define EXT2_DIR_PAD 4
515 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
516 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
521 * Function prototypes
525 * Ok, these declarations are also in <linux/kernel.h> but none of the
526 * ext2 source programs needs to include it so they are duplicated here.
528 # define NORET_TYPE /**/
529 # define ATTRIB_NORET __attribute__((noreturn))
530 # define NORET_AND noreturn,
533 extern int ext2_permission (struct inode *, int);
536 extern int ext2_group_sparse(int group);
537 extern int ext2_new_block (const struct inode *, unsigned long,
538 __u32 *, __u32 *, int *);
539 extern void ext2_free_blocks (const struct inode *, unsigned long,
541 extern unsigned long ext2_count_free_blocks (struct super_block *);
542 extern void ext2_check_blocks_bitmap (struct super_block *);
543 extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
544 unsigned int block_group,
545 struct buffer_head ** bh);
548 extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
551 extern int ext2_check_dir_entry (const char *, struct inode *,
552 struct ext2_dir_entry_2 *, struct buffer_head *,
556 extern int ext2_read (struct inode *, struct file *, char *, int);
557 extern int ext2_write (struct inode *, struct file *, char *, int);
560 extern int ext2_sync_file (struct file *, struct dentry *);
563 extern struct inode * ext2_new_inode (const struct inode *, int, int *);
564 extern void ext2_free_inode (struct inode *);
565 extern unsigned long ext2_count_free_inodes (struct super_block *);
566 extern void ext2_check_inodes_bitmap (struct super_block *);
569 extern long ext2_bmap (struct inode *, long);
570 extern int ext2_get_block (struct inode *, long, struct buffer_head *, int);
572 extern struct buffer_head * ext2_getblk (struct inode *, long, int, int *);
573 extern int ext2_getblk_block (struct inode *, long, int, int *, int *);
574 extern struct buffer_head * ext2_bread (struct inode *, int, int, int *);
576 extern int ext2_getcluster (struct inode * inode, long block);
577 extern void ext2_read_inode (struct inode *);
578 extern void ext2_write_inode (struct inode *);
579 extern void ext2_put_inode (struct inode *);
580 extern void ext2_delete_inode (struct inode *);
581 extern int ext2_sync_inode (struct inode *);
582 extern void ext2_discard_prealloc (struct inode *);
585 extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
589 extern void ext2_release (struct inode *, struct file *);
590 extern struct dentry *ext2_lookup (struct inode *, struct dentry *);
591 extern int ext2_create (struct inode *,struct dentry *,int);
592 extern int ext2_mkdir (struct inode *,struct dentry *,int);
593 extern int ext2_rmdir (struct inode *,struct dentry *);
594 extern int ext2_unlink (struct inode *,struct dentry *);
595 extern int ext2_symlink (struct inode *,struct dentry *,const char *);
596 extern int ext2_link (struct dentry *, struct inode *, struct dentry *);
597 extern int ext2_mknod (struct inode *, struct dentry *, int, int);
598 extern int ext2_rename (struct inode *, struct dentry *,
599 struct inode *, struct dentry *);
602 extern void ext2_error (struct super_block *, const char *, const char *, ...)
603 __attribute__ ((format (printf, 3, 4)));
604 extern NORET_TYPE void ext2_panic (struct super_block *, const char *,
606 __attribute__ ((NORET_AND format (printf, 3, 4)));
607 extern void ext2_warning (struct super_block *, const char *, const char *, ...)
608 __attribute__ ((format (printf, 3, 4)));
609 extern void ext2_put_super (struct super_block *);
610 extern void ext2_write_super (struct super_block *);
611 extern int ext2_remount (struct super_block *, int *, char *);
612 extern struct super_block * ext2_read_super (struct super_block *,void *,int);
613 extern int ext2_statfs (struct super_block *, struct statfs *, int);
616 extern void ext2_truncate (struct inode *);
619 * Inodes and files operations
623 extern struct inode_operations ext2_dir_inode_operations;
626 extern struct inode_operations ext2_file_inode_operations;
629 extern struct inode_operations ext2_symlink_inode_operations;
630 extern struct inode_operations ext2_fast_symlink_inode_operations;
632 #endif /* __KERNEL__ */
634 #endif /* _LINUX_EXT2_FS_H */