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ext2_fs.h @ 43

Last change on this file since 43 was 43, checked in by megakiss, 11 years ago
광주방송 OTC 주파수 369Mhz로 변경
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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_BOOT_LOADER_INO 5 /* Boot loader inode */
61	#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
62
63	/* First non-reserved inode for old ext2 filesystems */
64	#define EXT2_GOOD_OLD_FIRST_INO 11
65
66	/*
67	* The second extended file system magic number
68	*/
69	#define EXT2_SUPER_MAGIC 0xEF53
70
71	/* Assume that user mode programs are passing in an ext2fs superblock, not
72	* a kernel struct super_block. This will allow us to call the feature-test
73	* macros from user land. */
74	#define EXT2_SB(sb) (sb)
75
76	/*
77	* Maximal count of links to a file
78	*/
79	#define EXT2_LINK_MAX 32000
80
81	/*
82	* Macro-instructions used to manage several block sizes
83	*/
84	#define EXT2_MIN_BLOCK_SIZE 1024
85	#define EXT2_MAX_BLOCK_SIZE 4096
86	#define EXT2_MIN_BLOCK_LOG_SIZE 10
87	#define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
88	#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
89	#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
90	#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
91	EXT2_GOOD_OLD_INODE_SIZE : \
92	(s)->s_inode_size)
93	#define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
94	EXT2_GOOD_OLD_FIRST_INO : \
95	(s)->s_first_ino)
96
97	/*
98	* Macro-instructions used to manage fragments
99	*/
100	#define EXT2_MIN_FRAG_SIZE 1024
101	#define EXT2_MAX_FRAG_SIZE 4096
102	#define EXT2_MIN_FRAG_LOG_SIZE 10
103	#define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
104	#define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
105
106	/*
107	* Structure of a blocks group descriptor
108	*/
109	struct ext2_group_desc
110	{
111	__le32 bg_block_bitmap; /* Blocks bitmap block */
112	__le32 bg_inode_bitmap; /* Inodes bitmap block */
113	__le32 bg_inode_table; /* Inodes table block */
114	__le16 bg_free_blocks_count; /* Free blocks count */
115	__le16 bg_free_inodes_count; /* Free inodes count */
116	__le16 bg_used_dirs_count; /* Directories count */
117	__le16 bg_pad;
118	__le32 bg_reserved[3];
119	};
120
121	/*
122	* Macro-instructions used to manage group descriptors
123	*/
124	#define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
125	#define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
126	#define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
127
128	/*
129	* Constants relative to the data blocks
130	*/
131	#define EXT2_NDIR_BLOCKS 12
132	#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
133	#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
134	#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
135	#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
136
137	/*
138	* Inode flags
139	*/
140	#define EXT2_SECRM_FL 0x00000001 /* Secure deletion */
141	#define EXT2_UNRM_FL 0x00000002 /* Undelete */
142	#define EXT2_COMPR_FL 0x00000004 /* Compress file */
143	#define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */
144	#define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */
145	#define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */
146	#define EXT2_NODUMP_FL 0x00000040 /* do not dump file */
147	#define EXT2_NOATIME_FL 0x00000080 /* do not update atime */
148	/* Reserved for compression usage... */
149	#define EXT2_DIRTY_FL 0x00000100
150	#define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
151	#define EXT2_NOCOMP_FL 0x00000400 /* Don't compress */
152	#define EXT2_ECOMPR_FL 0x00000800 /* Compression error */
153	/* End compression flags --- maybe not all used */
154	#define EXT2_BTREE_FL 0x00001000 /* btree format dir */
155	#define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */
156	#define EXT2_IMAGIC_FL 0x00002000 /* AFS directory */
157	#define EXT2_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
158	#define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */
159	#define EXT2_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
160	#define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
161	#define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
162
163	#define EXT2_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
164	#define EXT2_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
165
166	/*
167	* ioctl commands
168	*/
169	#define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
170	#define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
171	#define EXT2_IOC_GETVERSION _IOR('v', 1, long)
172	#define EXT2_IOC_SETVERSION _IOW('v', 2, long)
173
174	/*
175	* Structure of an inode on the disk
176	*/
177	struct ext2_inode {
178	__le16 i_mode; /* File mode */
179	__le16 i_uid; /* Low 16 bits of Owner Uid */
180	__le32 i_size; /* Size in bytes */
181	__le32 i_atime; /* Access time */
182	__le32 i_ctime; /* Creation time */
183	__le32 i_mtime; /* Modification time */
184	__le32 i_dtime; /* Deletion Time */
185	__le16 i_gid; /* Low 16 bits of Group Id */
186	__le16 i_links_count; /* Links count */
187	__le32 i_blocks; /* Blocks count */
188	__le32 i_flags; /* File flags */
189	union {
190	struct {
191	__le32 l_i_reserved1;
192	} linux1;
193	struct {
194	__le32 h_i_translator;
195	} hurd1;
196	struct {
197	__le32 m_i_reserved1;
198	} masix1;
199	} osd1; /* OS dependent 1 */
200	__le32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
201	__le32 i_generation; /* File version (for NFS) */
202	__le32 i_file_acl; /* File ACL */
203	__le32 i_dir_acl; /* Directory ACL */
204	__le32 i_faddr; /* Fragment address */
205	union {
206	struct {
207	__u8 l_i_frag; /* Fragment number */
208	__u8 l_i_fsize; /* Fragment size */
209	__u16 i_pad1;
210	__le16 l_i_uid_high; /* these 2 fields */
211	__le16 l_i_gid_high; /* were reserved2[0] */
212	__u32 l_i_reserved2;
213	} linux2;
214	struct {
215	__u8 h_i_frag; /* Fragment number */
216	__u8 h_i_fsize; /* Fragment size */
217	__le16 h_i_mode_high;
218	__le16 h_i_uid_high;
219	__le16 h_i_gid_high;
220	__le32 h_i_author;
221	} hurd2;
222	struct {
223	__u8 m_i_frag; /* Fragment number */
224	__u8 m_i_fsize; /* Fragment size */
225	__u16 m_pad1;
226	__u32 m_i_reserved2[2];
227	} masix2;
228	} osd2; /* OS dependent 2 */
229	};
230
231	#define i_size_high i_dir_acl
232
233	#if defined(__linux__)
234	#define i_reserved1 osd1.linux1.l_i_reserved1
235	#define i_frag osd2.linux2.l_i_frag
236	#define i_fsize osd2.linux2.l_i_fsize
237	#define i_uid_low i_uid
238	#define i_gid_low i_gid
239	#define i_uid_high osd2.linux2.l_i_uid_high
240	#define i_gid_high osd2.linux2.l_i_gid_high
241	#define i_reserved2 osd2.linux2.l_i_reserved2
242	#endif
243
244	#ifdef __hurd__
245	#define i_translator osd1.hurd1.h_i_translator
246	#define i_frag osd2.hurd2.h_i_frag;
247	#define i_fsize osd2.hurd2.h_i_fsize;
248	#define i_uid_high osd2.hurd2.h_i_uid_high
249	#define i_gid_high osd2.hurd2.h_i_gid_high
250	#define i_author osd2.hurd2.h_i_author
251	#endif
252
253	#ifdef __masix__
254	#define i_reserved1 osd1.masix1.m_i_reserved1
255	#define i_frag osd2.masix2.m_i_frag
256	#define i_fsize osd2.masix2.m_i_fsize
257	#define i_reserved2 osd2.masix2.m_i_reserved2
258	#endif
259
260	/*
261	* File system states
262	*/
263	#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
264	#define EXT2_ERROR_FS 0x0002 /* Errors detected */
265
266	/*
267	* Mount flags
268	*/
269	#define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
270	#define EXT2_MOUNT_OLDALLOC 0x0002 /* Don't use the new Orlov allocator */
271	#define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
272	#define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
273	#define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
274	#define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
275	#define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
276	#define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
277	#define EXT2_MOUNT_NOBH 0x0100 /* No buffer_heads */
278	#define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
279	#define EXT2_MOUNT_XATTR_USER 0x4000 /* Extended user attributes */
280	#define EXT2_MOUNT_POSIX_ACL 0x8000 /* POSIX Access Control Lists */
281
282	#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
283	#define set_opt(o, opt) o \|= EXT2_MOUNT_##opt
284	#define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \
285	EXT2_MOUNT_##opt)
286	/*
287	* Maximal mount counts between two filesystem checks
288	*/
289	#define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
290	#define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
291
292	/*
293	* Behaviour when detecting errors
294	*/
295	#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
296	#define EXT2_ERRORS_RO 2 /* Remount fs read-only */
297	#define EXT2_ERRORS_PANIC 3 /* Panic */
298	#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
299
300	/*
301	* Structure of the super block
302	*/
303	struct ext2_super_block {
304	__le32 s_inodes_count; /* Inodes count */
305	__le32 s_blocks_count; /* Blocks count */
306	__le32 s_r_blocks_count; /* Reserved blocks count */
307	__le32 s_free_blocks_count; /* Free blocks count */
308	__le32 s_free_inodes_count; /* Free inodes count */
309	__le32 s_first_data_block; /* First Data Block */
310	__le32 s_log_block_size; /* Block size */
311	__le32 s_log_frag_size; /* Fragment size */
312	__le32 s_blocks_per_group; /* # Blocks per group */
313	__le32 s_frags_per_group; /* # Fragments per group */
314	__le32 s_inodes_per_group; /* # Inodes per group */
315	__le32 s_mtime; /* Mount time */
316	__le32 s_wtime; /* Write time */
317	__le16 s_mnt_count; /* Mount count */
318	__le16 s_max_mnt_count; /* Maximal mount count */
319	__le16 s_magic; /* Magic signature */
320	__le16 s_state; /* File system state */
321	__le16 s_errors; /* Behaviour when detecting errors */
322	__le16 s_minor_rev_level; /* minor revision level */
323	__le32 s_lastcheck; /* time of last check */
324	__le32 s_checkinterval; /* max. time between checks */
325	__le32 s_creator_os; /* OS */
326	__le32 s_rev_level; /* Revision level */
327	__le16 s_def_resuid; /* Default uid for reserved blocks */
328	__le16 s_def_resgid; /* Default gid for reserved blocks */
329	/*
330	* These fields are for EXT2_DYNAMIC_REV superblocks only.
331	*
332	* Note: the difference between the compatible feature set and
333	* the incompatible feature set is that if there is a bit set
334	* in the incompatible feature set that the kernel doesn't
335	* know about, it should refuse to mount the filesystem.
336	*
337	* e2fsck's requirements are more strict; if it doesn't know
338	* about a feature in either the compatible or incompatible
339	* feature set, it must abort and not try to meddle with
340	* things it doesn't understand...
341	*/
342	__le32 s_first_ino; /* First non-reserved inode */
343	__le16 s_inode_size; /* size of inode structure */
344	__le16 s_block_group_nr; /* block group # of this superblock */
345	__le32 s_feature_compat; /* compatible feature set */
346	__le32 s_feature_incompat; /* incompatible feature set */
347	__le32 s_feature_ro_compat; /* readonly-compatible feature set */
348	__u8 s_uuid[16]; /* 128-bit uuid for volume */
349	char s_volume_name[16]; /* volume name */
350	char s_last_mounted[64]; /* directory where last mounted */
351	__le32 s_algorithm_usage_bitmap; /* For compression */
352	/*
353	* Performance hints. Directory preallocation should only
354	* happen if the EXT2_COMPAT_PREALLOC flag is on.
355	*/
356	__u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
357	__u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
358	__u16 s_padding1;
359	/*
360	* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
361	*/
362	__u8 s_journal_uuid[16]; /* uuid of journal superblock */
363	__u32 s_journal_inum; /* inode number of journal file */
364	__u32 s_journal_dev; /* device number of journal file */
365	__u32 s_last_orphan; /* start of list of inodes to delete */
366	__u32 s_hash_seed[4]; /* HTREE hash seed */
367	__u8 s_def_hash_version; /* Default hash version to use */
368	__u8 s_reserved_char_pad;
369	__u16 s_reserved_word_pad;
370	__le32 s_default_mount_opts;
371	__le32 s_first_meta_bg; /* First metablock block group */
372	__u32 s_reserved[190]; /* Padding to the end of the block */
373	};
374
375	/*
376	* Codes for operating systems
377	*/
378	#define EXT2_OS_LINUX 0
379	#define EXT2_OS_HURD 1
380	#define EXT2_OS_MASIX 2
381	#define EXT2_OS_FREEBSD 3
382	#define EXT2_OS_LITES 4
383
384	/*
385	* Revision levels
386	*/
387	#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
388	#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
389
390	#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
391	#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
392
393	#define EXT2_GOOD_OLD_INODE_SIZE 128
394
395	/*
396	* Feature set definitions
397	*/
398
399	#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
400	( EXT2_SB(sb)->s_es->s_feature_compat & __cpu_to_le32(mask) )
401	#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
402	( EXT2_SB(sb)->s_es->s_feature_ro_compat & __cpu_to_le32(mask) )
403	#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
404	( EXT2_SB(sb)->s_es->s_feature_incompat & __cpu_to_le32(mask) )
405	#define EXT2_SET_COMPAT_FEATURE(sb,mask) \
406	EXT2_SB(sb)->s_es->s_feature_compat \|= __cpu_to_le32(mask)
407	#define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
408	EXT2_SB(sb)->s_es->s_feature_ro_compat \|= __cpu_to_le32(mask)
409	#define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
410	EXT2_SB(sb)->s_es->s_feature_incompat \|= __cpu_to_le32(mask)
411	#define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
412	EXT2_SB(sb)->s_es->s_feature_compat &= ~__cpu_to_le32(mask)
413	#define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
414	EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~__cpu_to_le32(mask)
415	#define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
416	EXT2_SB(sb)->s_es->s_feature_incompat &= ~__cpu_to_le32(mask)
417
418	#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
419	#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
420	#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
421	#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
422	#define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
423	#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
424	#define EXT2_FEATURE_COMPAT_ANY 0xffffffff
425
426	#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
427	#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
428	#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
429	#define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
430
431	#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
432	#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
433	#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
434	#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
435	#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
436	#define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff
437
438	#define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
439	#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE\| \
440	EXT2_FEATURE_INCOMPAT_META_BG)
441	#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER\| \
442	EXT2_FEATURE_RO_COMPAT_LARGE_FILE\| \
443	EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
444	#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
445	#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
446
447	/*
448	* Default values for user and/or group using reserved blocks
449	*/
450	#define EXT2_DEF_RESUID 0
451	#define EXT2_DEF_RESGID 0
452
453	/*
454	* Default mount options
455	*/
456	#define EXT2_DEFM_DEBUG 0x0001
457	#define EXT2_DEFM_BSDGROUPS 0x0002
458	#define EXT2_DEFM_XATTR_USER 0x0004
459	#define EXT2_DEFM_ACL 0x0008
460	#define EXT2_DEFM_UID16 0x0010
461	/* Not used by ext2, but reserved for use by ext3 */
462	#define EXT3_DEFM_JMODE 0x0060
463	#define EXT3_DEFM_JMODE_DATA 0x0020
464	#define EXT3_DEFM_JMODE_ORDERED 0x0040
465	#define EXT3_DEFM_JMODE_WBACK 0x0060
466
467	/*
468	* Structure of a directory entry
469	*/
470	#define EXT2_NAME_LEN 255
471
472	struct ext2_dir_entry {
473	__le32 inode; /* Inode number */
474	__le16 rec_len; /* Directory entry length */
475	__le16 name_len; /* Name length */
476	char name[EXT2_NAME_LEN]; /* File name */
477	};
478
479	/*
480	* The new version of the directory entry. Since EXT2 structures are
481	* stored in intel byte order, and the name_len field could never be
482	* bigger than 255 chars, it's safe to reclaim the extra byte for the
483	* file_type field.
484	*/
485	struct ext2_dir_entry_2 {
486	__le32 inode; /* Inode number */
487	__le16 rec_len; /* Directory entry length */
488	__u8 name_len; /* Name length */
489	__u8 file_type;
490	char name[EXT2_NAME_LEN]; /* File name */
491	};
492
493	/*
494	* Ext2 directory file types. Only the low 3 bits are used. The
495	* other bits are reserved for now.
496	*/
497	enum {
498	EXT2_FT_UNKNOWN,
499	EXT2_FT_REG_FILE,
500	EXT2_FT_DIR,
501	EXT2_FT_CHRDEV,
502	EXT2_FT_BLKDEV,
503	EXT2_FT_FIFO,
504	EXT2_FT_SOCK,
505	EXT2_FT_SYMLINK,
506	EXT2_FT_MAX
507	};
508
509	/*
510	* EXT2_DIR_PAD defines the directory entries boundaries
511	*
512	* NOTE: It must be a multiple of 4
513	*/
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) & \
517	~EXT2_DIR_ROUND)
518
519	#endif /* _LINUX_EXT2_FS_H */

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source: svn/newcon3bcm2_21bu/toolchain/mips-linux-uclibc/include/linux/ext2_fs.h @ 43

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