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 */
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 * Macro-instructions used to manage group descriptors
153 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->u.ext2_sb.s_blocks_per_group)
154 # define EXT2_DESC_PER_BLOCK(s) ((s)->u.ext2_sb.s_desc_per_block)
155 # define EXT2_INODES_PER_GROUP(s) ((s)->u.ext2_sb.s_inodes_per_group)
156 # define EXT2_DESC_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_desc_per_block_bits)
158 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
159 # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
160 # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
164 * Constants relative to the data blocks
166 #define EXT2_NDIR_BLOCKS 12
167 #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
168 #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
169 #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
170 #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
175 #define EXT2_SECRM_FL 0x00000001 /* Secure deletion */
176 #define EXT2_UNRM_FL 0x00000002 /* Undelete */
177 #define EXT2_COMPR_FL 0x00000004 /* Compress file */
178 #define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */
179 #define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */
180 #define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */
181 #define EXT2_NODUMP_FL 0x00000040 /* do not dump file */
182 #define EXT2_NOATIME_FL 0x00000080 /* do not update atime */
183 /* Reserved for compression usage... */
184 #define EXT2_DIRTY_FL 0x00000100
185 #define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
186 #define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */
187 #define EXT2_ECOMPR_FL 0x00000800 /* Compression error */
188 /* End compression flags --- maybe not all used */
189 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */
190 #define EXT2_IMAGIC_FL 0x00002000
191 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
192 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
194 #define EXT2_FL_USER_VISIBLE 0x00005FFF /* User visible flags */
195 #define EXT2_FL_USER_MODIFIABLE 0x000000FF /* User modifiable flags */
200 #define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
201 #define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
202 #define EXT2_IOC_GETVERSION _IOR('v', 1, long)
203 #define EXT2_IOC_SETVERSION _IOW('v', 2, long)
206 * Structure of an inode on the disk
209 __u16 i_mode; /* File mode */
210 __u16 i_uid; /* Low 16 bits of Owner Uid */
211 __u32 i_size; /* Size in bytes */
212 __u32 i_atime; /* Access time */
213 __u32 i_ctime; /* Creation time */
214 __u32 i_mtime; /* Modification time */
215 __u32 i_dtime; /* Deletion Time */
216 __u16 i_gid; /* Low 16 bits of Group Id */
217 __u16 i_links_count; /* Links count */
218 __u32 i_blocks; /* Blocks count */
219 __u32 i_flags; /* File flags */
225 __u32 h_i_translator;
230 } osd1; /* OS dependent 1 */
231 __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
232 __u32 i_generation; /* File version (for NFS) */
233 __u32 i_file_acl; /* File ACL */
234 __u32 i_dir_acl; /* Directory ACL */
235 __u32 i_faddr; /* Fragment address */
238 __u8 l_i_frag; /* Fragment number */
239 __u8 l_i_fsize; /* Fragment size */
241 __u16 l_i_uid_high; /* these 2 fields */
242 __u16 l_i_gid_high; /* were reserved2[0] */
246 __u8 h_i_frag; /* Fragment number */
247 __u8 h_i_fsize; /* Fragment size */
254 __u8 m_i_frag; /* Fragment number */
255 __u8 m_i_fsize; /* Fragment size */
257 __u32 m_i_reserved2[2];
259 } osd2; /* OS dependent 2 */
262 #define i_size_high i_dir_acl
264 #if defined(__KERNEL__) || defined(__linux__)
265 #define i_reserved1 osd1.linux1.l_i_reserved1
266 #define i_frag osd2.linux2.l_i_frag
267 #define i_fsize osd2.linux2.l_i_fsize
268 #define i_uid_low i_uid
269 #define i_gid_low i_gid
270 #define i_uid_high osd2.linux2.l_i_uid_high
271 #define i_gid_high osd2.linux2.l_i_gid_high
272 #define i_reserved2 osd2.linux2.l_i_reserved2
274 #elif defined(__GNU__)
276 #define i_translator osd1.hurd1.h_i_translator
277 #define i_frag osd2.hurd2.h_i_frag;
278 #define i_fsize osd2.hurd2.h_i_fsize;
279 #define i_uid_high osd2.hurd2.h_i_uid_high
280 #define i_gid_high osd2.hurd2.h_i_gid_high
281 #define i_author osd2.hurd2.h_i_author
283 #elif defined(__masix__)
285 #define i_reserved1 osd1.masix1.m_i_reserved1
286 #define i_frag osd2.masix2.m_i_frag
287 #define i_fsize osd2.masix2.m_i_fsize
288 #define i_reserved2 osd2.masix2.m_i_reserved2
290 #endif /* defined(__KERNEL) || defined(__linux__) */
295 #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
296 #define EXT2_ERROR_FS 0x0002 /* Errors detected */
301 #define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
302 #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
303 #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
304 #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
305 #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
306 #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
307 #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
308 #define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
310 #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
311 #define set_opt(o, opt) o |= EXT2_MOUNT_##opt
312 #define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \
315 * Maximal mount counts between two filesystem checks
317 #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
318 #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
321 * Behaviour when detecting errors
323 #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
324 #define EXT2_ERRORS_RO 2 /* Remount fs read-only */
325 #define EXT2_ERRORS_PANIC 3 /* Panic */
326 #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
329 * Structure of the super block
331 struct ext2_super_block {
332 __u32 s_inodes_count; /* Inodes count */
333 __u32 s_blocks_count; /* Blocks count */
334 __u32 s_r_blocks_count; /* Reserved blocks count */
335 __u32 s_free_blocks_count; /* Free blocks count */
336 __u32 s_free_inodes_count; /* Free inodes count */
337 __u32 s_first_data_block; /* First Data Block */
338 __u32 s_log_block_size; /* Block size */
339 __s32 s_log_frag_size; /* Fragment size */
340 __u32 s_blocks_per_group; /* # Blocks per group */
341 __u32 s_frags_per_group; /* # Fragments per group */
342 __u32 s_inodes_per_group; /* # Inodes per group */
343 __u32 s_mtime; /* Mount time */
344 __u32 s_wtime; /* Write time */
345 __u16 s_mnt_count; /* Mount count */
346 __s16 s_max_mnt_count; /* Maximal mount count */
347 __u16 s_magic; /* Magic signature */
348 __u16 s_state; /* File system state */
349 __u16 s_errors; /* Behaviour when detecting errors */
350 __u16 s_minor_rev_level; /* minor revision level */
351 __u32 s_lastcheck; /* time of last check */
352 __u32 s_checkinterval; /* max. time between checks */
353 __u32 s_creator_os; /* OS */
354 __u32 s_rev_level; /* Revision level */
355 __u16 s_def_resuid; /* Default uid for reserved blocks */
356 __u16 s_def_resgid; /* Default gid for reserved blocks */
358 * These fields are for EXT2_DYNAMIC_REV superblocks only.
360 * Note: the difference between the compatible feature set and
361 * the incompatible feature set is that if there is a bit set
362 * in the incompatible feature set that the kernel doesn't
363 * know about, it should refuse to mount the filesystem.
365 * e2fsck's requirements are more strict; if it doesn't know
366 * about a feature in either the compatible or incompatible
367 * feature set, it must abort and not try to meddle with
368 * things it doesn't understand...
370 __u32 s_first_ino; /* First non-reserved inode */
371 __u16 s_inode_size; /* size of inode structure */
372 __u16 s_block_group_nr; /* block group # of this superblock */
373 __u32 s_feature_compat; /* compatible feature set */
374 __u32 s_feature_incompat; /* incompatible feature set */
375 __u32 s_feature_ro_compat; /* readonly-compatible feature set */
376 __u8 s_uuid[16]; /* 128-bit uuid for volume */
377 char s_volume_name[16]; /* volume name */
378 char s_last_mounted[64]; /* directory where last mounted */
379 __u32 s_algorithm_usage_bitmap; /* For compression */
381 * Performance hints. Directory preallocation should only
382 * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
384 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
385 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
388 * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
390 __u8 s_journal_uuid[16]; /* uuid of journal superblock */
391 __u32 s_journal_inum; /* inode number of journal file */
392 __u32 s_journal_dev; /* device number of journal file */
393 __u32 s_last_orphan; /* start of list of inodes to delete */
395 __u32 s_reserved[197]; /* Padding to the end of the block */
399 #define EXT2_SB(sb) (&((sb)->u.ext2_sb))
401 /* Assume that user mode programs are passing in an ext2fs superblock, not
402 * a kernel struct super_block. This will allow us to call the feature-test
403 * macros from user land. */
404 #define EXT2_SB(sb) (sb)
408 * Codes for operating systems
410 #define EXT2_OS_LINUX 0
411 #define EXT2_OS_HURD 1
412 #define EXT2_OS_MASIX 2
413 #define EXT2_OS_FREEBSD 3
414 #define EXT2_OS_LITES 4
419 #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
420 #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
422 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
423 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
425 #define EXT2_GOOD_OLD_INODE_SIZE 128
428 * Feature set definitions
431 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
432 ( EXT2_SB(sb)->s_feature_compat & (mask) )
433 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
434 ( EXT2_SB(sb)->s_feature_ro_compat & (mask) )
435 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
436 ( EXT2_SB(sb)->s_feature_incompat & (mask) )
438 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
439 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
440 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
441 #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0008
442 #define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010
444 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
445 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
446 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
448 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
449 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
450 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
451 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
453 #define EXT2_FEATURE_COMPAT_SUPP 0
454 #define EXT2_FEATURE_INCOMPAT_SUPP EXT2_FEATURE_INCOMPAT_FILETYPE
455 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
456 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
457 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
460 * Default values for user and/or group using reserved blocks
462 #define EXT2_DEF_RESUID 0
463 #define EXT2_DEF_RESGID 0
466 * Structure of a directory entry
468 #define EXT2_NAME_LEN 255
470 struct ext2_dir_entry {
471 __u32 inode; /* Inode number */
472 __u16 rec_len; /* Directory entry length */
473 __u16 name_len; /* Name length */
474 char name[EXT2_NAME_LEN]; /* File name */
478 * The new version of the directory entry. Since EXT2 structures are
479 * stored in intel byte order, and the name_len field could never be
480 * bigger than 255 chars, it's safe to reclaim the extra byte for the
483 struct ext2_dir_entry_2 {
484 __u32 inode; /* Inode number */
485 __u16 rec_len; /* Directory entry length */
486 __u8 name_len; /* Name length */
488 char name[EXT2_NAME_LEN]; /* File name */
492 * Ext2 directory file types. Only the low 3 bits are used. The
493 * other bits are reserved for now.
495 #define EXT2_FT_UNKNOWN 0
496 #define EXT2_FT_REG_FILE 1
497 #define EXT2_FT_DIR 2
498 #define EXT2_FT_CHRDEV 3
499 #define EXT2_FT_BLKDEV 4
500 #define EXT2_FT_FIFO 5
501 #define EXT2_FT_SOCK 6
502 #define EXT2_FT_SYMLINK 7
504 #define EXT2_FT_MAX 8
507 * EXT2_DIR_PAD defines the directory entries boundaries
509 * NOTE: It must be a multiple of 4
511 #define EXT2_DIR_PAD 4
512 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
513 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
518 * Function prototypes
522 * Ok, these declarations are also in <linux/kernel.h> but none of the
523 * ext2 source programs needs to include it so they are duplicated here.
525 # define NORET_TYPE /**/
526 # define ATTRIB_NORET __attribute__((noreturn))
527 # define NORET_AND noreturn,
530 extern int ext2_permission (struct inode *, int);
533 extern int ext2_bg_has_super(struct super_block *sb, int group);
534 extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group);
535 extern int ext2_new_block (const struct inode *, unsigned long,
536 __u32 *, __u32 *, int *);
537 extern void ext2_free_blocks (const struct inode *, unsigned long,
539 extern unsigned long ext2_count_free_blocks (struct super_block *);
540 extern void ext2_check_blocks_bitmap (struct super_block *);
541 extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
542 unsigned int block_group,
543 struct buffer_head ** bh);
546 extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
549 extern int ext2_check_dir_entry (const char *, struct inode *,
550 struct ext2_dir_entry_2 *, struct buffer_head *,
554 extern int ext2_read (struct inode *, struct file *, char *, int);
555 extern int ext2_write (struct inode *, struct file *, char *, int);
558 extern int ext2_sync_file (struct file *, struct dentry *, int);
559 extern int ext2_fsync_inode (struct inode *, int);
562 extern struct inode * ext2_new_inode (const struct inode *, int);
563 extern void ext2_free_inode (struct inode *);
564 extern unsigned long ext2_count_free_inodes (struct super_block *);
565 extern void ext2_check_inodes_bitmap (struct super_block *);
569 extern struct buffer_head * ext2_getblk (struct inode *, long, int, int *);
570 extern struct buffer_head * ext2_bread (struct inode *, int, int, int *);
572 extern void ext2_read_inode (struct inode *);
573 extern void ext2_write_inode (struct inode *, int);
574 extern void ext2_put_inode (struct inode *);
575 extern void ext2_delete_inode (struct inode *);
576 extern int ext2_sync_inode (struct inode *);
577 extern void ext2_discard_prealloc (struct inode *);
580 extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
584 extern struct inode_operations ext2_dir_inode_operations;
587 extern void ext2_error (struct super_block *, const char *, const char *, ...)
588 __attribute__ ((format (printf, 3, 4)));
589 extern NORET_TYPE void ext2_panic (struct super_block *, const char *,
591 __attribute__ ((NORET_AND format (printf, 3, 4)));
592 extern void ext2_warning (struct super_block *, const char *, const char *, ...)
593 __attribute__ ((format (printf, 3, 4)));
594 extern void ext2_update_dynamic_rev (struct super_block *sb);
595 extern void ext2_put_super (struct super_block *);
596 extern void ext2_write_super (struct super_block *);
597 extern int ext2_remount (struct super_block *, int *, char *);
598 extern struct super_block * ext2_read_super (struct super_block *,void *,int);
599 extern int ext2_statfs (struct super_block *, struct statfs *);
602 extern void ext2_truncate (struct inode *);
605 * Inodes and files operations
609 extern struct file_operations ext2_dir_operations;
612 extern struct inode_operations ext2_file_inode_operations;
613 extern struct file_operations ext2_file_operations;
616 extern struct inode_operations ext2_fast_symlink_inode_operations;
618 extern struct address_space_operations ext2_aops;
620 #endif /* __KERNEL__ */
622 #endif /* _LINUX_EXT2_FS_H */