File: /usr/include/linux/ext2_fs.h
1 /*
2 * linux/include/linux/ext2_fs.h
3 *
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)
8 *
9 * from
10 *
11 * linux/include/linux/minix_fs.h
12 *
13 * Copyright (C) 1991, 1992 Linus Torvalds
14 */
15
16 #ifndef _LINUX_EXT2_FS_H
17 #define _LINUX_EXT2_FS_H
18
19 #include <linux/types.h>
20
21 /*
22 * The second extended filesystem constants/structures
23 */
24
25 /*
26 * Define EXT2FS_DEBUG to produce debug messages
27 */
28 #undef EXT2FS_DEBUG
29
30 /*
31 * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files
32 */
33 #define EXT2_PREALLOCATE
34 #define EXT2_DEFAULT_PREALLOC_BLOCKS 8
35
36 /*
37 * The second extended file system version
38 */
39 #define EXT2FS_DATE "95/08/09"
40 #define EXT2FS_VERSION "0.5b"
41
42 /*
43 * Debug code
44 */
45 #ifdef EXT2FS_DEBUG
46 # define ext2_debug(f, a...) { \
47 printk ("EXT2-fs DEBUG (%s, %d): %s:", \
48 __FILE__, __LINE__, __FUNCTION__); \
49 printk (f, ## a); \
50 }
51 #else
52 # define ext2_debug(f, a...) /**/
53 #endif
54
55 /*
56 * Special inodes numbers
57 */
58 #define EXT2_BAD_INO 1 /* Bad blocks inode */
59 #define EXT2_ROOT_INO 2 /* Root inode */
60 #define EXT2_ACL_IDX_INO 3 /* ACL inode */
61 #define EXT2_ACL_DATA_INO 4 /* ACL inode */
62 #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
63 #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
64
65 /* First non-reserved inode for old ext2 filesystems */
66 #define EXT2_GOOD_OLD_FIRST_INO 11
67
68 /*
69 * The second extended file system magic number
70 */
71 #define EXT2_SUPER_MAGIC 0xEF53
72
73 /*
74 * Maximal count of links to a file
75 */
76 #define EXT2_LINK_MAX 32000
77
78 /*
79 * Macro-instructions used to manage several block sizes
80 */
81 #define EXT2_MIN_BLOCK_SIZE 1024
82 #define EXT2_MAX_BLOCK_SIZE 4096
83 #define EXT2_MIN_BLOCK_LOG_SIZE 10
84 #ifdef __KERNEL__
85 # define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
86 #else
87 # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
88 #endif
89 #define EXT2_ACLE_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_acl_entry))
90 #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
91 #ifdef __KERNEL__
92 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
93 #else
94 # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
95 #endif
96 #ifdef __KERNEL__
97 #define EXT2_ADDR_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_addr_per_block_bits)
98 #define EXT2_INODE_SIZE(s) ((s)->u.ext2_sb.s_inode_size)
99 #define EXT2_FIRST_INO(s) ((s)->u.ext2_sb.s_first_ino)
100 #else
101 #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
102 EXT2_GOOD_OLD_INODE_SIZE : \
103 (s)->s_inode_size)
104 #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
105 EXT2_GOOD_OLD_FIRST_INO : \
106 (s)->s_first_ino)
107 #endif
108
109 /*
110 * Macro-instructions used to manage fragments
111 */
112 #define EXT2_MIN_FRAG_SIZE 1024
113 #define EXT2_MAX_FRAG_SIZE 4096
114 #define EXT2_MIN_FRAG_LOG_SIZE 10
115 #ifdef __KERNEL__
116 # define EXT2_FRAG_SIZE(s) ((s)->u.ext2_sb.s_frag_size)
117 # define EXT2_FRAGS_PER_BLOCK(s) ((s)->u.ext2_sb.s_frags_per_block)
118 #else
119 # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
120 # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
121 #endif
122
123 /*
124 * ACL structures
125 */
126 struct ext2_acl_header /* Header of Access Control Lists */
127 {
128 __u32 aclh_size;
129 __u32 aclh_file_count;
130 __u32 aclh_acle_count;
131 __u32 aclh_first_acle;
132 };
133
134 struct ext2_acl_entry /* Access Control List Entry */
135 {
136 __u32 acle_size;
137 __u16 acle_perms; /* Access permissions */
138 __u16 acle_type; /* Type of entry */
139 __u16 acle_tag; /* User or group identity */
140 __u16 acle_pad1;
141 __u32 acle_next; /* Pointer on next entry for the */
142 /* same inode or on next free entry */
143 };
144
145 /*
146 * Structure of a blocks group descriptor
147 */
148 struct ext2_group_desc
149 {
150 __u32 bg_block_bitmap; /* Blocks bitmap block */
151 __u32 bg_inode_bitmap; /* Inodes bitmap block */
152 __u32 bg_inode_table; /* Inodes table block */
153 __u16 bg_free_blocks_count; /* Free blocks count */
154 __u16 bg_free_inodes_count; /* Free inodes count */
155 __u16 bg_used_dirs_count; /* Directories count */
156 __u16 bg_pad;
157 __u32 bg_reserved[3];
158 };
159
160 /*
161 * Macro-instructions used to manage group descriptors
162 */
163 #ifdef __KERNEL__
164 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->u.ext2_sb.s_blocks_per_group)
165 # define EXT2_DESC_PER_BLOCK(s) ((s)->u.ext2_sb.s_desc_per_block)
166 # define EXT2_INODES_PER_GROUP(s) ((s)->u.ext2_sb.s_inodes_per_group)
167 # define EXT2_DESC_PER_BLOCK_BITS(s) ((s)->u.ext2_sb.s_desc_per_block_bits)
168 #else
169 # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
170 # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
171 # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
172 #endif
173
174 /*
175 * Constants relative to the data blocks
176 */
177 #define EXT2_NDIR_BLOCKS 12
178 #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
179 #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
180 #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
181 #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
182
183 /*
184 * Inode flags
185 */
186 #define EXT2_SECRM_FL 0x00000001 /* Secure deletion */
187 #define EXT2_UNRM_FL 0x00000002 /* Undelete */
188 #define EXT2_COMPR_FL 0x00000004 /* Compress file */
189 #define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */
190 #define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */
191 #define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */
192 #define EXT2_NODUMP_FL 0x00000040 /* do not dump file */
193 #define EXT2_NOATIME_FL 0x00000080 /* do not update atime */
194 /* Reserved for compression usage... */
195 #define EXT2_DIRTY_FL 0x00000100
196 #define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
197 #define EXT2_NOCOMP_FL 0x00000400 /* Don't compress */
198 #define EXT2_ECOMPR_FL 0x00000800 /* Compression error */
199 /* End compression flags --- maybe not all used */
200 #define EXT2_BTREE_FL 0x00001000 /* btree format dir */
201 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
202
203 #define EXT2_FL_USER_VISIBLE 0x00001FFF /* User visible flags */
204 #define EXT2_FL_USER_MODIFIABLE 0x000000FF /* User modifiable flags */
205
206 /*
207 * ioctl commands
208 */
209 #define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
210 #define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
211 #define EXT2_IOC_GETVERSION _IOR('v', 1, long)
212 #define EXT2_IOC_SETVERSION _IOW('v', 2, long)
213
214 /*
215 * Structure of an inode on the disk
216 */
217 struct ext2_inode {
218 __u16 i_mode; /* File mode */
219 __u16 i_uid; /* Low 16 bits of Owner Uid */
220 __u32 i_size; /* Size in bytes */
221 __u32 i_atime; /* Access time */
222 __u32 i_ctime; /* Creation time */
223 __u32 i_mtime; /* Modification time */
224 __u32 i_dtime; /* Deletion Time */
225 __u16 i_gid; /* Low 16 bits of Group Id */
226 __u16 i_links_count; /* Links count */
227 __u32 i_blocks; /* Blocks count */
228 __u32 i_flags; /* File flags */
229 union {
230 struct {
231 __u32 l_i_reserved1;
232 } linux1;
233 struct {
234 __u32 h_i_translator;
235 } hurd1;
236 struct {
237 __u32 m_i_reserved1;
238 } masix1;
239 } osd1; /* OS dependent 1 */
240 __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
241 __u32 i_generation; /* File version (for NFS) */
242 __u32 i_file_acl; /* File ACL */
243 __u32 i_dir_acl; /* Directory ACL */
244 __u32 i_faddr; /* Fragment address */
245 union {
246 struct {
247 __u8 l_i_frag; /* Fragment number */
248 __u8 l_i_fsize; /* Fragment size */
249 __u16 i_pad1;
250 __u16 l_i_uid_high; /* these 2 fields */
251 __u16 l_i_gid_high; /* were reserved2[0] */
252 __u32 l_i_reserved2;
253 } linux2;
254 struct {
255 __u8 h_i_frag; /* Fragment number */
256 __u8 h_i_fsize; /* Fragment size */
257 __u16 h_i_mode_high;
258 __u16 h_i_uid_high;
259 __u16 h_i_gid_high;
260 __u32 h_i_author;
261 } hurd2;
262 struct {
263 __u8 m_i_frag; /* Fragment number */
264 __u8 m_i_fsize; /* Fragment size */
265 __u16 m_pad1;
266 __u32 m_i_reserved2[2];
267 } masix2;
268 } osd2; /* OS dependent 2 */
269 };
270
271 #define i_size_high i_dir_acl
272
273 #if defined(__KERNEL__) || defined(__linux__)
274 #define i_reserved1 osd1.linux1.l_i_reserved1
275 #define i_frag osd2.linux2.l_i_frag
276 #define i_fsize osd2.linux2.l_i_fsize
277 #define i_uid_low i_uid
278 #define i_gid_low i_gid
279 #define i_uid_high osd2.linux2.l_i_uid_high
280 #define i_gid_high osd2.linux2.l_i_gid_high
281 #define i_reserved2 osd2.linux2.l_i_reserved2
282 #endif
283
284 #ifdef __hurd__
285 #define i_translator osd1.hurd1.h_i_translator
286 #define i_frag osd2.hurd2.h_i_frag;
287 #define i_fsize osd2.hurd2.h_i_fsize;
288 #define i_uid_high osd2.hurd2.h_i_uid_high
289 #define i_gid_high osd2.hurd2.h_i_gid_high
290 #define i_author osd2.hurd2.h_i_author
291 #endif
292
293 #ifdef __masix__
294 #define i_reserved1 osd1.masix1.m_i_reserved1
295 #define i_frag osd2.masix2.m_i_frag
296 #define i_fsize osd2.masix2.m_i_fsize
297 #define i_reserved2 osd2.masix2.m_i_reserved2
298 #endif
299
300 /*
301 * File system states
302 */
303 #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
304 #define EXT2_ERROR_FS 0x0002 /* Errors detected */
305
306 /*
307 * Mount flags
308 */
309 #define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
310 #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
311 #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
312 #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
313 #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
314 #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
315 #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
316 #define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
317
318 #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
319 #define set_opt(o, opt) o |= EXT2_MOUNT_##opt
320 #define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \
321 EXT2_MOUNT_##opt)
322 /*
323 * Maximal mount counts between two filesystem checks
324 */
325 #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
326 #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
327
328 /*
329 * Behaviour when detecting errors
330 */
331 #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
332 #define EXT2_ERRORS_RO 2 /* Remount fs read-only */
333 #define EXT2_ERRORS_PANIC 3 /* Panic */
334 #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
335
336 /*
337 * Structure of the super block
338 */
339 struct ext2_super_block {
340 __u32 s_inodes_count; /* Inodes count */
341 __u32 s_blocks_count; /* Blocks count */
342 __u32 s_r_blocks_count; /* Reserved blocks count */
343 __u32 s_free_blocks_count; /* Free blocks count */
344 __u32 s_free_inodes_count; /* Free inodes count */
345 __u32 s_first_data_block; /* First Data Block */
346 __u32 s_log_block_size; /* Block size */
347 __s32 s_log_frag_size; /* Fragment size */
348 __u32 s_blocks_per_group; /* # Blocks per group */
349 __u32 s_frags_per_group; /* # Fragments per group */
350 __u32 s_inodes_per_group; /* # Inodes per group */
351 __u32 s_mtime; /* Mount time */
352 __u32 s_wtime; /* Write time */
353 __u16 s_mnt_count; /* Mount count */
354 __s16 s_max_mnt_count; /* Maximal mount count */
355 __u16 s_magic; /* Magic signature */
356 __u16 s_state; /* File system state */
357 __u16 s_errors; /* Behaviour when detecting errors */
358 __u16 s_minor_rev_level; /* minor revision level */
359 __u32 s_lastcheck; /* time of last check */
360 __u32 s_checkinterval; /* max. time between checks */
361 __u32 s_creator_os; /* OS */
362 __u32 s_rev_level; /* Revision level */
363 __u16 s_def_resuid; /* Default uid for reserved blocks */
364 __u16 s_def_resgid; /* Default gid for reserved blocks */
365 /*
366 * These fields are for EXT2_DYNAMIC_REV superblocks only.
367 *
368 * Note: the difference between the compatible feature set and
369 * the incompatible feature set is that if there is a bit set
370 * in the incompatible feature set that the kernel doesn't
371 * know about, it should refuse to mount the filesystem.
372 *
373 * e2fsck's requirements are more strict; if it doesn't know
374 * about a feature in either the compatible or incompatible
375 * feature set, it must abort and not try to meddle with
376 * things it doesn't understand...
377 */
378 __u32 s_first_ino; /* First non-reserved inode */
379 __u16 s_inode_size; /* size of inode structure */
380 __u16 s_block_group_nr; /* block group # of this superblock */
381 __u32 s_feature_compat; /* compatible feature set */
382 __u32 s_feature_incompat; /* incompatible feature set */
383 __u32 s_feature_ro_compat; /* readonly-compatible feature set */
384 __u8 s_uuid[16]; /* 128-bit uuid for volume */
385 char s_volume_name[16]; /* volume name */
386 char s_last_mounted[64]; /* directory where last mounted */
387 __u32 s_algorithm_usage_bitmap; /* For compression */
388 /*
389 * Performance hints. Directory preallocation should only
390 * happen if the EXT2_COMPAT_PREALLOC flag is on.
391 */
392 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
393 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
394 __u16 s_padding1;
395 __u32 s_reserved[204]; /* Padding to the end of the block */
396 };
397
398 #ifdef __KERNEL__
399 #define EXT2_SB(sb) (&((sb)->u.ext2_sb))
400 #else
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)
405 #endif
406
407 /*
408 * Codes for operating systems
409 */
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
415
416 /*
417 * Revision levels
418 */
419 #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
420 #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
421
422 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
423 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
424
425 #define EXT2_GOOD_OLD_INODE_SIZE 128
426
427 /*
428 * Feature set definitions
429 */
430
431 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
432 ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
433 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
434 ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
435 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
436 ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
437 #define EXT2_SET_COMPAT_FEATURE(sb,mask) \
438 EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
439 #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
440 EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
441 #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
442 EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
443 #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
444 EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
445 #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
446 EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
447 #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
448 EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
449
450 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
451
452 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
453 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
454 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
455
456 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
457 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
458
459 #define EXT2_FEATURE_COMPAT_SUPP 0
460 #define EXT2_FEATURE_INCOMPAT_SUPP EXT2_FEATURE_INCOMPAT_FILETYPE
461 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
462 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
463 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
464
465 /*
466 * Default values for user and/or group using reserved blocks
467 */
468 #define EXT2_DEF_RESUID 0
469 #define EXT2_DEF_RESGID 0
470
471 /*
472 * Structure of a directory entry
473 */
474 #define EXT2_NAME_LEN 255
475
476 struct ext2_dir_entry {
477 __u32 inode; /* Inode number */
478 __u16 rec_len; /* Directory entry length */
479 __u16 name_len; /* Name length */
480 char name[EXT2_NAME_LEN]; /* File name */
481 };
482
483 /*
484 * The new version of the directory entry. Since EXT2 structures are
485 * stored in intel byte order, and the name_len field could never be
486 * bigger than 255 chars, it's safe to reclaim the extra byte for the
487 * file_type field.
488 */
489 struct ext2_dir_entry_2 {
490 __u32 inode; /* Inode number */
491 __u16 rec_len; /* Directory entry length */
492 __u8 name_len; /* Name length */
493 __u8 file_type;
494 char name[EXT2_NAME_LEN]; /* File name */
495 };
496
497 /*
498 * Ext2 directory file types. Only the low 3 bits are used. The
499 * other bits are reserved for now.
500 */
501 #define EXT2_FT_UNKNOWN 0
502 #define EXT2_FT_REG_FILE 1
503 #define EXT2_FT_DIR 2
504 #define EXT2_FT_CHRDEV 3
505 #define EXT2_FT_BLKDEV 4
506 #define EXT2_FT_FIFO 5
507 #define EXT2_FT_SOCK 6
508 #define EXT2_FT_SYMLINK 7
509
510 #define EXT2_FT_MAX 8
511
512 /*
513 * EXT2_DIR_PAD defines the directory entries boundaries
514 *
515 * NOTE: It must be a multiple of 4
516 */
517 #define EXT2_DIR_PAD 4
518 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
519 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
520 ~EXT2_DIR_ROUND)
521
522 #ifdef __KERNEL__
523 /*
524 * Function prototypes
525 */
526
527 /*
528 * Ok, these declarations are also in <linux/kernel.h> but none of the
529 * ext2 source programs needs to include it so they are duplicated here.
530 */
531 # define NORET_TYPE /**/
532 # define ATTRIB_NORET __attribute__((noreturn))
533 # define NORET_AND noreturn,
534
535 /* acl.c */
536 extern int ext2_permission (struct inode *, int);
537
538 /* balloc.c */
539 extern int ext2_bg_has_super(struct super_block *sb, int group);
540 extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group);
541 extern int ext2_new_block (struct inode *, unsigned long,
542 __u32 *, __u32 *, int *);
543 extern void ext2_free_blocks (struct inode *, unsigned long,
544 unsigned long);
545 extern unsigned long ext2_count_free_blocks (struct super_block *);
546 extern void ext2_check_blocks_bitmap (struct super_block *);
547 extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
548 unsigned int block_group,
549 struct buffer_head ** bh);
550
551 /* bitmap.c */
552 extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
553
554 /* dir.c */
555 extern int ext2_check_dir_entry (const char *, struct inode *,
556 struct ext2_dir_entry_2 *, struct buffer_head *,
557 unsigned long);
558
559 /* file.c */
560 extern int ext2_read (struct inode *, struct file *, char *, int);
561 extern int ext2_write (struct inode *, struct file *, char *, int);
562
563 /* fsync.c */
564 extern int ext2_sync_file (struct file *, struct dentry *, int);
565 extern int ext2_fsync_inode (struct inode *, int);
566
567 /* ialloc.c */
568 extern struct inode * ext2_new_inode (const struct inode *, int);
569 extern void ext2_free_inode (struct inode *);
570 extern unsigned long ext2_count_free_inodes (struct super_block *);
571 extern void ext2_check_inodes_bitmap (struct super_block *);
572
573 /* inode.c */
574
575 extern struct buffer_head * ext2_getblk (struct inode *, long, int, int *);
576 extern struct buffer_head * ext2_bread (struct inode *, int, int, int *);
577
578 extern void ext2_read_inode (struct inode *);
579 extern void ext2_write_inode (struct inode *, int);
580 extern void ext2_put_inode (struct inode *);
581 extern void ext2_delete_inode (struct inode *);
582 extern int ext2_sync_inode (struct inode *);
583 extern void ext2_discard_prealloc (struct inode *);
584
585 /* ioctl.c */
586 extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
587 unsigned long);
588
589 /* namei.c */
590 extern struct inode_operations ext2_dir_inode_operations;
591
592 /* super.c */
593 extern void ext2_error (struct super_block *, const char *, const char *, ...)
594 __attribute__ ((format (printf, 3, 4)));
595 extern NORET_TYPE void ext2_panic (struct super_block *, const char *,
596 const char *, ...)
597 __attribute__ ((NORET_AND format (printf, 3, 4)));
598 extern void ext2_warning (struct super_block *, const char *, const char *, ...)
599 __attribute__ ((format (printf, 3, 4)));
600 extern void ext2_update_dynamic_rev (struct super_block *sb);
601 extern void ext2_put_super (struct super_block *);
602 extern void ext2_write_super (struct super_block *);
603 extern int ext2_remount (struct super_block *, int *, char *);
604 extern struct super_block * ext2_read_super (struct super_block *,void *,int);
605 extern int ext2_statfs (struct super_block *, struct statfs *);
606
607 /* truncate.c */
608 extern void ext2_truncate (struct inode *);
609
610 /*
611 * Inodes and files operations
612 */
613
614 /* dir.c */
615 extern struct file_operations ext2_dir_operations;
616
617 /* file.c */
618 extern struct inode_operations ext2_file_inode_operations;
619 extern struct file_operations ext2_file_operations;
620
621 /* symlink.c */
622 extern struct inode_operations ext2_fast_symlink_inode_operations;
623
624 extern struct address_space_operations ext2_aops;
625
626 #endif /* __KERNEL__ */
627
628 #endif /* _LINUX_EXT2_FS_H */
629