projects / reactos.git / blob
? search:


93a114cd6e72b0573c8509dbcbd4a60ed5f6a062
[reactos.git] / reactos / drivers / filesystems / ext2_new / inc / 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 inode 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_IMAGIC_FL 0x00002000 /* AFS directory */
202 #define EXT2_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
203 #define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */
204 #define EXT2_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
205 #define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
206 #define EXT2_HUGE_FILE_FL 0x00040000 /* Set to each huge file */
207 #define EXT2_EXTENTS_FL 0x00080000 /* Inode uses extents */
208 #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
209
210 #define EXT2_FL_USER_VISIBLE 0x00001FFF /* User visible flags */
211 #define EXT2_FL_USER_MODIFIABLE 0x000000FF /* User modifiable flags */
212
213 /*
214 * ioctl commands
215 */
216 #define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
217 #define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
218 #define EXT2_IOC_GETVERSION _IOR('v', 1, long)
219 #define EXT2_IOC_SETVERSION _IOW('v', 2, long)
220
221 /*
222 * Structure of an inode on the disk
223 */
224 struct ext2_inode {
225 __u16 i_mode; /* File mode */
226 __u16 i_uid; /* Low 16 bits of Owner Uid */
227 __u32 i_size; /* Size in bytes */
228 __u32 i_atime; /* Access time */
229 __u32 i_ctime; /* Creation time */
230 __u32 i_mtime; /* Modification time */
231 __u32 i_dtime; /* Deletion Time */
232 __u16 i_gid; /* Low 16 bits of Group Id */
233 __u16 i_links_count; /* Links count */
234 __u32 i_blocks; /* Blocks count */
235 __u32 i_flags; /* File flags */
236 union {
237 struct {
238 __u32 l_i_reserved1;
239 } linux1;
240 struct {
241 __u32 h_i_translator;
242 } hurd1;
243 struct {
244 __u32 m_i_reserved1;
245 } masix1;
246 } osd1; /* OS dependent 1 */
247 __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
248 __u32 i_generation; /* File version (for NFS) */
249 __u32 i_file_acl; /* File ACL */
250 __u32 i_dir_acl; /* Directory ACL */
251 __u32 i_faddr; /* Fragment address */
252 union {
253 struct {
254 __u8 l_i_frag; /* Fragment number */
255 __u8 l_i_fsize; /* Fragment size */
256 __u16 i_pad1;
257 __u16 l_i_uid_high; /* these 2 fields */
258 __u16 l_i_gid_high; /* were reserved2[0] */
259 __u32 l_i_reserved2;
260 } linux2;
261 struct {
262 __u8 h_i_frag; /* Fragment number */
263 __u8 h_i_fsize; /* Fragment size */
264 __u16 h_i_mode_high;
265 __u16 h_i_uid_high;
266 __u16 h_i_gid_high;
267 __u32 h_i_author;
268 } hurd2;
269 struct {
270 __u8 m_i_frag; /* Fragment number */
271 __u8 m_i_fsize; /* Fragment size */
272 __u16 m_pad1;
273 __u32 m_i_reserved2[2];
274 } masix2;
275 } osd2; /* OS dependent 2 */
276 __le16 i_extra_isize;
277 __le16 i_pad1;
278 };
279
280 #if defined(__KERNEL__) || defined(__linux__)
281 #define i_reserved1 osd1.linux1.l_i_reserved1
282 #define i_frag osd2.linux2.l_i_frag
283 #define i_fsize osd2.linux2.l_i_fsize
284 #define i_uid_low i_uid
285 #define i_gid_low i_gid
286 #define i_uid_high osd2.linux2.l_i_uid_high
287 #define i_gid_high osd2.linux2.l_i_gid_high
288 #define i_reserved2 osd2.linux2.l_i_reserved2
289 #endif
290
291 #ifdef __hurd__
292 #define i_translator osd1.hurd1.h_i_translator
293 #define i_frag osd2.hurd2.h_i_frag;
294 #define i_fsize osd2.hurd2.h_i_fsize;
295 #define i_uid_high osd2.hurd2.h_i_uid_high
296 #define i_gid_high osd2.hurd2.h_i_gid_high
297 #define i_author osd2.hurd2.h_i_author
298 #endif
299
300 #ifdef __masix__
301 #define i_reserved1 osd1.masix1.m_i_reserved1
302 #define i_frag osd2.masix2.m_i_frag
303 #define i_fsize osd2.masix2.m_i_fsize
304 #define i_reserved2 osd2.masix2.m_i_reserved2
305 #endif
306
307 /*
308 * File system states
309 */
310 #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
311 #define EXT2_ERROR_FS 0x0002 /* Errors detected */
312
313 /*
314 * Mount flags
315 */
316 #define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
317 #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
318 #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
319 #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
320 #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
321 #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
322 #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
323 #define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
324
325 #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
326 #define set_opt(o, opt) o |= EXT2_MOUNT_##opt
327 #define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \
328 EXT2_MOUNT_##opt)
329 /*
330 * Maximal mount counts between two filesystem checks
331 */
332 #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
333 #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
334
335 /*
336 * Behaviour when detecting errors
337 */
338 #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
339 #define EXT2_ERRORS_RO 2 /* Remount fs read-only */
340 #define EXT2_ERRORS_PANIC 3 /* Panic */
341 #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
342
343 /*
344 * Structure of the super block
345 */
346 struct ext2_super_block {
347 __u32 s_inodes_count; /* Inodes count */
348 __u32 s_blocks_count; /* Blocks count */
349 __u32 s_r_blocks_count; /* Reserved blocks count */
350 __u32 s_free_blocks_count; /* Free blocks count */
351 __u32 s_free_inodes_count; /* Free inodes count */
352 __u32 s_first_data_block; /* First Data Block */
353 __u32 s_log_block_size; /* Block size */
354 __s32 s_log_frag_size; /* Fragment size */
355 __u32 s_blocks_per_group; /* # Blocks per group */
356 __u32 s_frags_per_group; /* # Fragments per group */
357 __u32 s_inodes_per_group; /* # Inodes per group */
358 __u32 s_mtime; /* Mount time */
359 __u32 s_wtime; /* Write time */
360 __u16 s_mnt_count; /* Mount count */
361 __s16 s_max_mnt_count; /* Maximal mount count */
362 __u16 s_magic; /* Magic signature */
363 __u16 s_state; /* File system state */
364 __u16 s_errors; /* Behaviour when detecting errors */
365 __u16 s_minor_rev_level; /* minor revision level */
366 __u32 s_lastcheck; /* time of last check */
367 __u32 s_checkinterval; /* max. time between checks */
368 __u32 s_creator_os; /* OS */
369 __u32 s_rev_level; /* Revision level */
370 __u16 s_def_resuid; /* Default uid for reserved blocks */
371 __u16 s_def_resgid; /* Default gid for reserved blocks */
372 /*
373 * These fields are for EXT2_DYNAMIC_REV superblocks only.
374 *
375 * Note: the difference between the compatible feature set and
376 * the incompatible feature set is that if there is a bit set
377 * in the incompatible feature set that the kernel doesn't
378 * know about, it should refuse to mount the filesystem.
379 *
380 * e2fsck's requirements are more strict; if it doesn't know
381 * about a feature in either the compatible or incompatible
382 * feature set, it must abort and not try to meddle with
383 * things it doesn't understand...
384 */
385 __u32 s_first_ino; /* First non-reserved inode */
386 __u16 s_inode_size; /* size of inode structure */
387 __u16 s_block_group_nr; /* block group # of this superblock */
388 __u32 s_feature_compat; /* compatible feature set */
389 __u32 s_feature_incompat; /* incompatible feature set */
390 __u32 s_feature_ro_compat; /* readonly-compatible feature set */
391 __u8 s_uuid[16]; /* 128-bit uuid for volume */
392 char s_volume_name[16]; /* volume name */
393 char s_last_mounted[64]; /* directory where last mounted */
394 __u32 s_algorithm_usage_bitmap; /* For compression */
395 /*
396 * Performance hints. Directory preallocation should only
397 * happen if the EXT2_COMPAT_PREALLOC flag is on.
398 */
399 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
400 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
401 __u16 s_padding1;
402 __u32 s_reserved[204]; /* Padding to the end of the block */
403 };
404
405 #ifdef __KERNEL__
406 #define EXT2_SB(sb) (&((sb)->u.ext2_sb))
407 #else
408 /* Assume that user mode programs are passing in an ext2fs superblock, not
409 * a kernel struct super_block. This will allow us to call the feature-test
410 * macros from user land. */
411 #define EXT2_SB(sb) (sb)
412 #endif
413
414 /*
415 * Codes for operating systems
416 */
417 #define EXT2_OS_LINUX 0
418 #define EXT2_OS_HURD 1
419 #define EXT2_OS_MASIX 2
420 #define EXT2_OS_FREEBSD 3
421 #define EXT2_OS_LITES 4
422
423 /*
424 * Revision levels
425 */
426 #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
427 #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
428
429 #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
430 #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
431
432 #define EXT2_GOOD_OLD_INODE_SIZE 128
433
434 /*
435 * Feature set definitions
436 */
437
438 #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
439 ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
440 #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
441 ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
442 #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
443 ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
444 #define EXT2_SET_COMPAT_FEATURE(sb,mask) \
445 EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
446 #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
447 EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
448 #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
449 EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
450 #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
451 EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
452 #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
453 EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
454 #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
455 EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
456
457 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
458 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
459 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
460 #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
461 #define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
462 #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
463 #define EXT2_FEATURE_COMPAT_ANY 0xffffffff
464
465 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
466 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
467 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
468 #define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
469
470 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
471 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
472
473 #define EXT2_FEATURE_COMPAT_SUPP 0
474 #define EXT2_FEATURE_INCOMPAT_SUPP EXT2_FEATURE_INCOMPAT_FILETYPE
475 #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
476 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
477 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
478 #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
479 #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
480
481 /*
482 * Default values for user and/or group using reserved blocks
483 */
484 #define EXT2_DEF_RESUID 0
485 #define EXT2_DEF_RESGID 0
486
487 /*
488 * Structure of a directory entry
489 */
490 #define EXT2_NAME_LEN 255
491
492 struct ext2_dir_entry {
493 __u32 inode; /* Inode number */
494 __u16 rec_len; /* Directory entry length */
495 __u16 name_len; /* Name length */
496 char name[EXT2_NAME_LEN]; /* File name */
497 };
498
499 /*
500 * The new version of the directory entry. Since EXT2 structures are
501 * stored in intel byte order, and the name_len field could never be
502 * bigger than 255 chars, it's safe to reclaim the extra byte for the
503 * file_type field.
504 */
505 struct ext2_dir_entry_2 {
506 __u32 inode; /* Inode number */
507 __u16 rec_len; /* Directory entry length */
508 __u8 name_len; /* Name length */
509 __u8 file_type;
510 char name[EXT2_NAME_LEN]; /* File name */
511 };
512
513 /*
514 * Ext2 directory file types. Only the low 3 bits are used. The
515 * other bits are reserved for now.
516 */
517 enum {
518 EXT2_FT_UNKNOWN,
519 EXT2_FT_REG_FILE,
520 EXT2_FT_DIR,
521 EXT2_FT_CHRDEV,
522 EXT2_FT_BLKDEV,
523 EXT2_FT_FIFO,
524 EXT2_FT_SOCK,
525 EXT2_FT_SYMLINK,
526 EXT2_FT_MAX
527 };
528
529 /*
530 * EXT2_DIR_PAD defines the directory entries boundaries
531 *
532 * NOTE: It must be a multiple of 4
533 */
534 #define EXT2_DIR_PAD 4
535 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
536 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
537 ~EXT2_DIR_ROUND)
538
539 #ifdef __KERNEL__
540 /*
541 * Function prototypes
542 */
543
544 /*
545 * Ok, these declarations are also in <linux/kernel.h> but none of the
546 * ext2 source programs needs to include it so they are duplicated here.
547 */
548 # define NORET_TYPE /**/
549 # define ATTRIB_NORET __attribute__((noreturn))
550 # define NORET_AND noreturn,
551
552 /* balloc.c */
553 extern int ext2_bg_has_super(struct super_block *sb, int group);
554 extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group);
555 extern int ext2_new_block (struct inode *, unsigned long,
556 __u32 *, __u32 *, int *);
557 extern void ext2_free_blocks (struct inode *, unsigned long,
558 unsigned long);
559 extern unsigned long ext2_count_free_blocks (struct super_block *);
560 extern void ext2_check_blocks_bitmap (struct super_block *);
561 extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
562 unsigned int block_group,
563 struct buffer_head ** bh);
564
565 /* dir.c */
566 extern int ext2_add_link (struct dentry *, struct inode *);
567 extern ino_t ext2_inode_by_name(struct inode *, struct dentry *);
568 extern int ext2_make_empty(struct inode *, struct inode *);
569 extern struct ext2_dir_entry_2 * ext2_find_entry (struct inode *,struct dentry *, struct page **);
570 extern int ext2_delete_entry (struct ext2_dir_entry_2 *, struct page *);
571 extern int ext2_empty_dir (struct inode *);
572 extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **);
573 extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *);
574
575 /* fsync.c */
576 extern int ext2_sync_file (struct file *, struct dentry *, int);
577 extern int ext2_fsync_inode (struct inode *, int);
578
579 /* ialloc.c */
580 extern struct inode * ext2_new_inode (const struct inode *, int);
581 extern void ext2_free_inode (struct inode *);
582 extern unsigned long ext2_count_free_inodes (struct super_block *);
583 extern void ext2_check_inodes_bitmap (struct super_block *);
584 extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
585
586 /* inode.c */
587 extern void ext2_read_inode (struct inode *);
588 extern void ext2_write_inode (struct inode *, int);
589 extern void ext2_put_inode (struct inode *);
590 extern void ext2_delete_inode (struct inode *);
591 extern int ext2_sync_inode (struct inode *);
592 extern void ext2_discard_prealloc (struct inode *);
593 extern void ext2_truncate (struct inode *);
594
595 /* ioctl.c */
596 extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
597 unsigned long);
598
599 /* super.c */
600 extern void ext2_error (struct super_block *, const char *, const char *, ...)
601 __attribute__ ((format (printf, 3, 4)));
602 extern NORET_TYPE void ext2_panic (struct super_block *, const char *,
603 const char *, ...)
604 __attribute__ ((NORET_AND format (printf, 3, 4)));
605 extern void ext2_warning (struct super_block *, const char *, const char *, ...)
606 __attribute__ ((format (printf, 3, 4)));
607 extern void ext2_update_dynamic_rev (struct super_block *sb);
608 extern void ext2_put_super (struct super_block *);
609 extern void ext2_write_super (struct super_block *);
610 extern int ext2_remount (struct super_block *, int *, char *);
611 extern struct super_block * ext2_read_super (struct super_block *,void *,int);
612 #ifndef __REACTOS__
613 extern int ext2_statfs (struct super_block *, struct statfs *);
614 #endif
615
616 /*
617 * Inodes and files operations
618 */
619
620 /* dir.c */
621 extern struct file_operations ext2_dir_operations;
622
623 /* file.c */
624 extern struct inode_operations ext2_file_inode_operations;
625 extern struct file_operations ext2_file_operations;
626
627 /* inode.c */
628 extern struct address_space_operations ext2_aops;
629
630 /* namei.c */
631 extern struct inode_operations ext2_dir_inode_operations;
632
633 /* symlink.c */
634 extern struct inode_operations ext2_fast_symlink_inode_operations;
635
636 #endif /* __KERNEL__ */
637
638 #endif /* _LINUX_EXT2_FS_H */
A free Windows-compatible Operating System