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1da177e4 LT |
1 | /* |
2 | * linux/include/linux/ext3_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_EXT3_FS_H | |
17 | #define _LINUX_EXT3_FS_H | |
18 | ||
19 | #include <linux/types.h> | |
1da177e4 LT |
20 | |
21 | /* | |
22 | * The second extended filesystem constants/structures | |
23 | */ | |
24 | ||
25 | /* | |
26 | * Define EXT3FS_DEBUG to produce debug messages | |
27 | */ | |
28 | #undef EXT3FS_DEBUG | |
29 | ||
30 | /* | |
31 | * Define EXT3_RESERVATION to reserve data blocks for expanding files | |
32 | */ | |
33 | #define EXT3_DEFAULT_RESERVE_BLOCKS 8 | |
b54e41ec MC |
34 | /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ |
35 | #define EXT3_MAX_RESERVE_BLOCKS 1027 | |
1da177e4 LT |
36 | #define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0 |
37 | /* | |
38 | * Always enable hashed directories | |
39 | */ | |
40 | #define CONFIG_EXT3_INDEX | |
41 | ||
42 | /* | |
43 | * Debug code | |
44 | */ | |
45 | #ifdef EXT3FS_DEBUG | |
46 | #define ext3_debug(f, a...) \ | |
47 | do { \ | |
48 | printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \ | |
49 | __FILE__, __LINE__, __FUNCTION__); \ | |
50 | printk (KERN_DEBUG f, ## a); \ | |
51 | } while (0) | |
52 | #else | |
53 | #define ext3_debug(f, a...) do {} while (0) | |
54 | #endif | |
55 | ||
56 | /* | |
57 | * Special inodes numbers | |
58 | */ | |
59 | #define EXT3_BAD_INO 1 /* Bad blocks inode */ | |
60 | #define EXT3_ROOT_INO 2 /* Root inode */ | |
61 | #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */ | |
62 | #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */ | |
63 | #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */ | |
64 | #define EXT3_JOURNAL_INO 8 /* Journal inode */ | |
65 | ||
66 | /* First non-reserved inode for old ext3 filesystems */ | |
67 | #define EXT3_GOOD_OLD_FIRST_INO 11 | |
68 | ||
69 | /* | |
70 | * The second extended file system magic number | |
71 | */ | |
72 | #define EXT3_SUPER_MAGIC 0xEF53 | |
73 | ||
74 | /* | |
75 | * Maximal count of links to a file | |
76 | */ | |
77 | #define EXT3_LINK_MAX 32000 | |
78 | ||
79 | /* | |
80 | * Macro-instructions used to manage several block sizes | |
81 | */ | |
82 | #define EXT3_MIN_BLOCK_SIZE 1024 | |
83 | #define EXT3_MAX_BLOCK_SIZE 4096 | |
84 | #define EXT3_MIN_BLOCK_LOG_SIZE 10 | |
85 | #ifdef __KERNEL__ | |
86 | # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize) | |
87 | #else | |
88 | # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size) | |
89 | #endif | |
90 | #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32)) | |
91 | #ifdef __KERNEL__ | |
92 | # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) | |
93 | #else | |
94 | # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) | |
95 | #endif | |
96 | #ifdef __KERNEL__ | |
97 | #define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits) | |
98 | #define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size) | |
99 | #define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino) | |
100 | #else | |
101 | #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \ | |
102 | EXT3_GOOD_OLD_INODE_SIZE : \ | |
103 | (s)->s_inode_size) | |
104 | #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \ | |
105 | EXT3_GOOD_OLD_FIRST_INO : \ | |
106 | (s)->s_first_ino) | |
107 | #endif | |
108 | ||
109 | /* | |
110 | * Macro-instructions used to manage fragments | |
111 | */ | |
112 | #define EXT3_MIN_FRAG_SIZE 1024 | |
113 | #define EXT3_MAX_FRAG_SIZE 4096 | |
114 | #define EXT3_MIN_FRAG_LOG_SIZE 10 | |
115 | #ifdef __KERNEL__ | |
116 | # define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size) | |
117 | # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block) | |
118 | #else | |
119 | # define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size) | |
120 | # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s)) | |
121 | #endif | |
122 | ||
123 | /* | |
124 | * Structure of a blocks group descriptor | |
125 | */ | |
126 | struct ext3_group_desc | |
127 | { | |
128 | __le32 bg_block_bitmap; /* Blocks bitmap block */ | |
129 | __le32 bg_inode_bitmap; /* Inodes bitmap block */ | |
130 | __le32 bg_inode_table; /* Inodes table block */ | |
131 | __le16 bg_free_blocks_count; /* Free blocks count */ | |
132 | __le16 bg_free_inodes_count; /* Free inodes count */ | |
133 | __le16 bg_used_dirs_count; /* Directories count */ | |
134 | __u16 bg_pad; | |
135 | __le32 bg_reserved[3]; | |
136 | }; | |
137 | ||
138 | /* | |
139 | * Macro-instructions used to manage group descriptors | |
140 | */ | |
141 | #ifdef __KERNEL__ | |
142 | # define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group) | |
143 | # define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block) | |
144 | # define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group) | |
145 | # define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits) | |
146 | #else | |
147 | # define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) | |
148 | # define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc)) | |
149 | # define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) | |
150 | #endif | |
151 | ||
152 | /* | |
153 | * Constants relative to the data blocks | |
154 | */ | |
155 | #define EXT3_NDIR_BLOCKS 12 | |
156 | #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS | |
157 | #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1) | |
158 | #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1) | |
159 | #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1) | |
160 | ||
161 | /* | |
162 | * Inode flags | |
163 | */ | |
164 | #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */ | |
165 | #define EXT3_UNRM_FL 0x00000002 /* Undelete */ | |
166 | #define EXT3_COMPR_FL 0x00000004 /* Compress file */ | |
167 | #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */ | |
168 | #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */ | |
169 | #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */ | |
170 | #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */ | |
171 | #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */ | |
172 | /* Reserved for compression usage... */ | |
173 | #define EXT3_DIRTY_FL 0x00000100 | |
174 | #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ | |
175 | #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */ | |
176 | #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */ | |
177 | /* End compression flags --- maybe not all used */ | |
178 | #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */ | |
179 | #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */ | |
180 | #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ | |
181 | #define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */ | |
182 | #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ | |
183 | #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ | |
184 | #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */ | |
185 | ||
186 | #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ | |
187 | #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ | |
188 | ||
189 | /* | |
190 | * Inode dynamic state flags | |
191 | */ | |
192 | #define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */ | |
193 | #define EXT3_STATE_NEW 0x00000002 /* inode is newly created */ | |
194 | #define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */ | |
195 | ||
196 | /* Used to pass group descriptor data when online resize is done */ | |
197 | struct ext3_new_group_input { | |
198 | __u32 group; /* Group number for this data */ | |
199 | __u32 block_bitmap; /* Absolute block number of block bitmap */ | |
200 | __u32 inode_bitmap; /* Absolute block number of inode bitmap */ | |
201 | __u32 inode_table; /* Absolute block number of inode table start */ | |
202 | __u32 blocks_count; /* Total number of blocks in this group */ | |
203 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ | |
204 | __u16 unused; | |
205 | }; | |
206 | ||
207 | /* The struct ext3_new_group_input in kernel space, with free_blocks_count */ | |
208 | struct ext3_new_group_data { | |
209 | __u32 group; | |
210 | __u32 block_bitmap; | |
211 | __u32 inode_bitmap; | |
212 | __u32 inode_table; | |
213 | __u32 blocks_count; | |
214 | __u16 reserved_blocks; | |
215 | __u16 unused; | |
216 | __u32 free_blocks_count; | |
217 | }; | |
218 | ||
219 | ||
220 | /* | |
221 | * ioctl commands | |
222 | */ | |
223 | #define EXT3_IOC_GETFLAGS _IOR('f', 1, long) | |
224 | #define EXT3_IOC_SETFLAGS _IOW('f', 2, long) | |
225 | #define EXT3_IOC_GETVERSION _IOR('f', 3, long) | |
226 | #define EXT3_IOC_SETVERSION _IOW('f', 4, long) | |
227 | #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) | |
228 | #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input) | |
229 | #define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long) | |
230 | #define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long) | |
231 | #ifdef CONFIG_JBD_DEBUG | |
232 | #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) | |
233 | #endif | |
234 | #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long) | |
235 | #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long) | |
236 | ||
08c6a96f JK |
237 | /* |
238 | * Mount options | |
239 | */ | |
240 | struct ext3_mount_options { | |
241 | unsigned long s_mount_opt; | |
242 | uid_t s_resuid; | |
243 | gid_t s_resgid; | |
244 | unsigned long s_commit_interval; | |
245 | #ifdef CONFIG_QUOTA | |
246 | int s_jquota_fmt; | |
247 | char *s_qf_names[MAXQUOTAS]; | |
248 | #endif | |
249 | }; | |
250 | ||
1da177e4 LT |
251 | /* |
252 | * Structure of an inode on the disk | |
253 | */ | |
254 | struct ext3_inode { | |
255 | __le16 i_mode; /* File mode */ | |
256 | __le16 i_uid; /* Low 16 bits of Owner Uid */ | |
257 | __le32 i_size; /* Size in bytes */ | |
258 | __le32 i_atime; /* Access time */ | |
259 | __le32 i_ctime; /* Creation time */ | |
260 | __le32 i_mtime; /* Modification time */ | |
261 | __le32 i_dtime; /* Deletion Time */ | |
262 | __le16 i_gid; /* Low 16 bits of Group Id */ | |
263 | __le16 i_links_count; /* Links count */ | |
264 | __le32 i_blocks; /* Blocks count */ | |
265 | __le32 i_flags; /* File flags */ | |
266 | union { | |
267 | struct { | |
268 | __u32 l_i_reserved1; | |
269 | } linux1; | |
270 | struct { | |
271 | __u32 h_i_translator; | |
272 | } hurd1; | |
273 | struct { | |
274 | __u32 m_i_reserved1; | |
275 | } masix1; | |
276 | } osd1; /* OS dependent 1 */ | |
277 | __le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */ | |
278 | __le32 i_generation; /* File version (for NFS) */ | |
279 | __le32 i_file_acl; /* File ACL */ | |
280 | __le32 i_dir_acl; /* Directory ACL */ | |
281 | __le32 i_faddr; /* Fragment address */ | |
282 | union { | |
283 | struct { | |
284 | __u8 l_i_frag; /* Fragment number */ | |
285 | __u8 l_i_fsize; /* Fragment size */ | |
286 | __u16 i_pad1; | |
287 | __le16 l_i_uid_high; /* these 2 fields */ | |
288 | __le16 l_i_gid_high; /* were reserved2[0] */ | |
289 | __u32 l_i_reserved2; | |
290 | } linux2; | |
291 | struct { | |
292 | __u8 h_i_frag; /* Fragment number */ | |
293 | __u8 h_i_fsize; /* Fragment size */ | |
294 | __u16 h_i_mode_high; | |
295 | __u16 h_i_uid_high; | |
296 | __u16 h_i_gid_high; | |
297 | __u32 h_i_author; | |
298 | } hurd2; | |
299 | struct { | |
300 | __u8 m_i_frag; /* Fragment number */ | |
301 | __u8 m_i_fsize; /* Fragment size */ | |
302 | __u16 m_pad1; | |
303 | __u32 m_i_reserved2[2]; | |
304 | } masix2; | |
305 | } osd2; /* OS dependent 2 */ | |
306 | __le16 i_extra_isize; | |
307 | __le16 i_pad1; | |
308 | }; | |
309 | ||
310 | #define i_size_high i_dir_acl | |
311 | ||
312 | #if defined(__KERNEL__) || defined(__linux__) | |
313 | #define i_reserved1 osd1.linux1.l_i_reserved1 | |
314 | #define i_frag osd2.linux2.l_i_frag | |
315 | #define i_fsize osd2.linux2.l_i_fsize | |
316 | #define i_uid_low i_uid | |
317 | #define i_gid_low i_gid | |
318 | #define i_uid_high osd2.linux2.l_i_uid_high | |
319 | #define i_gid_high osd2.linux2.l_i_gid_high | |
320 | #define i_reserved2 osd2.linux2.l_i_reserved2 | |
321 | ||
322 | #elif defined(__GNU__) | |
323 | ||
324 | #define i_translator osd1.hurd1.h_i_translator | |
325 | #define i_frag osd2.hurd2.h_i_frag; | |
326 | #define i_fsize osd2.hurd2.h_i_fsize; | |
327 | #define i_uid_high osd2.hurd2.h_i_uid_high | |
328 | #define i_gid_high osd2.hurd2.h_i_gid_high | |
329 | #define i_author osd2.hurd2.h_i_author | |
330 | ||
331 | #elif defined(__masix__) | |
332 | ||
333 | #define i_reserved1 osd1.masix1.m_i_reserved1 | |
334 | #define i_frag osd2.masix2.m_i_frag | |
335 | #define i_fsize osd2.masix2.m_i_fsize | |
336 | #define i_reserved2 osd2.masix2.m_i_reserved2 | |
337 | ||
338 | #endif /* defined(__KERNEL__) || defined(__linux__) */ | |
339 | ||
340 | /* | |
341 | * File system states | |
342 | */ | |
343 | #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */ | |
344 | #define EXT3_ERROR_FS 0x0002 /* Errors detected */ | |
345 | #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */ | |
346 | ||
347 | /* | |
348 | * Mount flags | |
349 | */ | |
350 | #define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */ | |
351 | #define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ | |
352 | #define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */ | |
353 | #define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */ | |
354 | #define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ | |
355 | #define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ | |
356 | #define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ | |
357 | #define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ | |
358 | #define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ | |
359 | #define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */ | |
360 | #define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ | |
361 | #define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ | |
362 | #define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ | |
363 | #define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ | |
364 | #define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ | |
365 | #define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ | |
366 | #define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ | |
367 | #define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ | |
368 | #define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */ | |
369 | #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */ | |
370 | #define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */ | |
1f54587b | 371 | #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */ |
8fc2751b MB |
372 | #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ |
373 | #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ | |
1da177e4 LT |
374 | |
375 | /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */ | |
376 | #ifndef _LINUX_EXT2_FS_H | |
377 | #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt | |
378 | #define set_opt(o, opt) o |= EXT3_MOUNT_##opt | |
379 | #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \ | |
380 | EXT3_MOUNT_##opt) | |
381 | #else | |
382 | #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD | |
383 | #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT | |
384 | #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS | |
385 | #endif | |
386 | ||
387 | #define ext3_set_bit ext2_set_bit | |
388 | #define ext3_set_bit_atomic ext2_set_bit_atomic | |
389 | #define ext3_clear_bit ext2_clear_bit | |
390 | #define ext3_clear_bit_atomic ext2_clear_bit_atomic | |
391 | #define ext3_test_bit ext2_test_bit | |
392 | #define ext3_find_first_zero_bit ext2_find_first_zero_bit | |
393 | #define ext3_find_next_zero_bit ext2_find_next_zero_bit | |
394 | ||
395 | /* | |
396 | * Maximal mount counts between two filesystem checks | |
397 | */ | |
398 | #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ | |
399 | #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */ | |
400 | ||
401 | /* | |
402 | * Behaviour when detecting errors | |
403 | */ | |
404 | #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */ | |
405 | #define EXT3_ERRORS_RO 2 /* Remount fs read-only */ | |
406 | #define EXT3_ERRORS_PANIC 3 /* Panic */ | |
407 | #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE | |
408 | ||
409 | /* | |
410 | * Structure of the super block | |
411 | */ | |
412 | struct ext3_super_block { | |
413 | /*00*/ __le32 s_inodes_count; /* Inodes count */ | |
414 | __le32 s_blocks_count; /* Blocks count */ | |
415 | __le32 s_r_blocks_count; /* Reserved blocks count */ | |
416 | __le32 s_free_blocks_count; /* Free blocks count */ | |
417 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ | |
418 | __le32 s_first_data_block; /* First Data Block */ | |
419 | __le32 s_log_block_size; /* Block size */ | |
420 | __le32 s_log_frag_size; /* Fragment size */ | |
421 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ | |
422 | __le32 s_frags_per_group; /* # Fragments per group */ | |
423 | __le32 s_inodes_per_group; /* # Inodes per group */ | |
424 | __le32 s_mtime; /* Mount time */ | |
425 | /*30*/ __le32 s_wtime; /* Write time */ | |
426 | __le16 s_mnt_count; /* Mount count */ | |
427 | __le16 s_max_mnt_count; /* Maximal mount count */ | |
428 | __le16 s_magic; /* Magic signature */ | |
429 | __le16 s_state; /* File system state */ | |
430 | __le16 s_errors; /* Behaviour when detecting errors */ | |
431 | __le16 s_minor_rev_level; /* minor revision level */ | |
432 | /*40*/ __le32 s_lastcheck; /* time of last check */ | |
433 | __le32 s_checkinterval; /* max. time between checks */ | |
434 | __le32 s_creator_os; /* OS */ | |
435 | __le32 s_rev_level; /* Revision level */ | |
436 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ | |
437 | __le16 s_def_resgid; /* Default gid for reserved blocks */ | |
438 | /* | |
439 | * These fields are for EXT3_DYNAMIC_REV superblocks only. | |
440 | * | |
441 | * Note: the difference between the compatible feature set and | |
442 | * the incompatible feature set is that if there is a bit set | |
443 | * in the incompatible feature set that the kernel doesn't | |
444 | * know about, it should refuse to mount the filesystem. | |
445 | * | |
446 | * e2fsck's requirements are more strict; if it doesn't know | |
447 | * about a feature in either the compatible or incompatible | |
448 | * feature set, it must abort and not try to meddle with | |
449 | * things it doesn't understand... | |
450 | */ | |
451 | __le32 s_first_ino; /* First non-reserved inode */ | |
452 | __le16 s_inode_size; /* size of inode structure */ | |
453 | __le16 s_block_group_nr; /* block group # of this superblock */ | |
454 | __le32 s_feature_compat; /* compatible feature set */ | |
455 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ | |
456 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ | |
457 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ | |
458 | /*78*/ char s_volume_name[16]; /* volume name */ | |
459 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ | |
460 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ | |
461 | /* | |
462 | * Performance hints. Directory preallocation should only | |
463 | * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on. | |
464 | */ | |
465 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ | |
466 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ | |
467 | __u16 s_reserved_gdt_blocks; /* Per group desc for online growth */ | |
468 | /* | |
469 | * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. | |
470 | */ | |
471 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ | |
472 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ | |
473 | __le32 s_journal_dev; /* device number of journal file */ | |
474 | __le32 s_last_orphan; /* start of list of inodes to delete */ | |
475 | __le32 s_hash_seed[4]; /* HTREE hash seed */ | |
476 | __u8 s_def_hash_version; /* Default hash version to use */ | |
477 | __u8 s_reserved_char_pad; | |
478 | __u16 s_reserved_word_pad; | |
479 | __le32 s_default_mount_opts; | |
480 | __le32 s_first_meta_bg; /* First metablock block group */ | |
481 | __u32 s_reserved[190]; /* Padding to the end of the block */ | |
482 | }; | |
483 | ||
484 | #ifdef __KERNEL__ | |
d85004eb DW |
485 | #include <linux/ext3_fs_i.h> |
486 | #include <linux/ext3_fs_sb.h> | |
1da177e4 LT |
487 | static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb) |
488 | { | |
489 | return sb->s_fs_info; | |
490 | } | |
491 | static inline struct ext3_inode_info *EXT3_I(struct inode *inode) | |
492 | { | |
493 | return container_of(inode, struct ext3_inode_info, vfs_inode); | |
494 | } | |
495 | #else | |
496 | /* Assume that user mode programs are passing in an ext3fs superblock, not | |
497 | * a kernel struct super_block. This will allow us to call the feature-test | |
498 | * macros from user land. */ | |
499 | #define EXT3_SB(sb) (sb) | |
500 | #endif | |
501 | ||
502 | #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime | |
503 | ||
504 | /* | |
505 | * Codes for operating systems | |
506 | */ | |
507 | #define EXT3_OS_LINUX 0 | |
508 | #define EXT3_OS_HURD 1 | |
509 | #define EXT3_OS_MASIX 2 | |
510 | #define EXT3_OS_FREEBSD 3 | |
511 | #define EXT3_OS_LITES 4 | |
512 | ||
513 | /* | |
514 | * Revision levels | |
515 | */ | |
516 | #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */ | |
517 | #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ | |
518 | ||
519 | #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV | |
520 | #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV | |
521 | ||
522 | #define EXT3_GOOD_OLD_INODE_SIZE 128 | |
523 | ||
524 | /* | |
525 | * Feature set definitions | |
526 | */ | |
527 | ||
528 | #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \ | |
529 | ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) | |
530 | #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \ | |
531 | ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) | |
532 | #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \ | |
533 | ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) | |
534 | #define EXT3_SET_COMPAT_FEATURE(sb,mask) \ | |
535 | EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) | |
536 | #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \ | |
537 | EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) | |
538 | #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \ | |
539 | EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) | |
540 | #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \ | |
541 | EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) | |
542 | #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ | |
543 | EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) | |
544 | #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \ | |
545 | EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) | |
546 | ||
547 | #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001 | |
548 | #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002 | |
549 | #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 | |
550 | #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008 | |
551 | #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010 | |
552 | #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020 | |
553 | ||
554 | #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 | |
555 | #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 | |
556 | #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 | |
557 | ||
558 | #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001 | |
559 | #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002 | |
560 | #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ | |
561 | #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ | |
562 | #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010 | |
563 | ||
564 | #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR | |
565 | #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \ | |
566 | EXT3_FEATURE_INCOMPAT_RECOVER| \ | |
567 | EXT3_FEATURE_INCOMPAT_META_BG) | |
568 | #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \ | |
569 | EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
570 | EXT3_FEATURE_RO_COMPAT_BTREE_DIR) | |
571 | ||
572 | /* | |
573 | * Default values for user and/or group using reserved blocks | |
574 | */ | |
575 | #define EXT3_DEF_RESUID 0 | |
576 | #define EXT3_DEF_RESGID 0 | |
577 | ||
578 | /* | |
579 | * Default mount options | |
580 | */ | |
581 | #define EXT3_DEFM_DEBUG 0x0001 | |
582 | #define EXT3_DEFM_BSDGROUPS 0x0002 | |
583 | #define EXT3_DEFM_XATTR_USER 0x0004 | |
584 | #define EXT3_DEFM_ACL 0x0008 | |
585 | #define EXT3_DEFM_UID16 0x0010 | |
586 | #define EXT3_DEFM_JMODE 0x0060 | |
587 | #define EXT3_DEFM_JMODE_DATA 0x0020 | |
588 | #define EXT3_DEFM_JMODE_ORDERED 0x0040 | |
589 | #define EXT3_DEFM_JMODE_WBACK 0x0060 | |
590 | ||
591 | /* | |
592 | * Structure of a directory entry | |
593 | */ | |
594 | #define EXT3_NAME_LEN 255 | |
595 | ||
596 | struct ext3_dir_entry { | |
597 | __le32 inode; /* Inode number */ | |
598 | __le16 rec_len; /* Directory entry length */ | |
599 | __le16 name_len; /* Name length */ | |
600 | char name[EXT3_NAME_LEN]; /* File name */ | |
601 | }; | |
602 | ||
603 | /* | |
604 | * The new version of the directory entry. Since EXT3 structures are | |
605 | * stored in intel byte order, and the name_len field could never be | |
606 | * bigger than 255 chars, it's safe to reclaim the extra byte for the | |
607 | * file_type field. | |
608 | */ | |
609 | struct ext3_dir_entry_2 { | |
610 | __le32 inode; /* Inode number */ | |
611 | __le16 rec_len; /* Directory entry length */ | |
612 | __u8 name_len; /* Name length */ | |
613 | __u8 file_type; | |
614 | char name[EXT3_NAME_LEN]; /* File name */ | |
615 | }; | |
616 | ||
617 | /* | |
618 | * Ext3 directory file types. Only the low 3 bits are used. The | |
619 | * other bits are reserved for now. | |
620 | */ | |
621 | #define EXT3_FT_UNKNOWN 0 | |
622 | #define EXT3_FT_REG_FILE 1 | |
623 | #define EXT3_FT_DIR 2 | |
624 | #define EXT3_FT_CHRDEV 3 | |
625 | #define EXT3_FT_BLKDEV 4 | |
626 | #define EXT3_FT_FIFO 5 | |
627 | #define EXT3_FT_SOCK 6 | |
628 | #define EXT3_FT_SYMLINK 7 | |
629 | ||
630 | #define EXT3_FT_MAX 8 | |
631 | ||
632 | /* | |
633 | * EXT3_DIR_PAD defines the directory entries boundaries | |
634 | * | |
635 | * NOTE: It must be a multiple of 4 | |
636 | */ | |
637 | #define EXT3_DIR_PAD 4 | |
638 | #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1) | |
639 | #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \ | |
640 | ~EXT3_DIR_ROUND) | |
641 | /* | |
642 | * Hash Tree Directory indexing | |
643 | * (c) Daniel Phillips, 2001 | |
644 | */ | |
645 | ||
646 | #ifdef CONFIG_EXT3_INDEX | |
647 | #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \ | |
648 | EXT3_FEATURE_COMPAT_DIR_INDEX) && \ | |
649 | (EXT3_I(dir)->i_flags & EXT3_INDEX_FL)) | |
650 | #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX) | |
651 | #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) | |
652 | #else | |
653 | #define is_dx(dir) 0 | |
654 | #define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX) | |
655 | #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2) | |
656 | #endif | |
657 | ||
658 | /* Legal values for the dx_root hash_version field: */ | |
659 | ||
660 | #define DX_HASH_LEGACY 0 | |
661 | #define DX_HASH_HALF_MD4 1 | |
662 | #define DX_HASH_TEA 2 | |
663 | ||
664 | /* hash info structure used by the directory hash */ | |
665 | struct dx_hash_info | |
666 | { | |
667 | u32 hash; | |
668 | u32 minor_hash; | |
669 | int hash_version; | |
670 | u32 *seed; | |
671 | }; | |
672 | ||
673 | #define EXT3_HTREE_EOF 0x7fffffff | |
674 | ||
675 | #ifdef __KERNEL__ | |
676 | /* | |
677 | * Control parameters used by ext3_htree_next_block | |
678 | */ | |
679 | #define HASH_NB_ALWAYS 1 | |
680 | ||
681 | ||
682 | /* | |
683 | * Describe an inode's exact location on disk and in memory | |
684 | */ | |
685 | struct ext3_iloc | |
686 | { | |
687 | struct buffer_head *bh; | |
688 | unsigned long offset; | |
689 | unsigned long block_group; | |
690 | }; | |
691 | ||
692 | static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc) | |
693 | { | |
694 | return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset); | |
695 | } | |
696 | ||
697 | /* | |
698 | * This structure is stuffed into the struct file's private_data field | |
699 | * for directories. It is where we put information so that we can do | |
700 | * readdir operations in hash tree order. | |
701 | */ | |
702 | struct dir_private_info { | |
703 | struct rb_root root; | |
704 | struct rb_node *curr_node; | |
705 | struct fname *extra_fname; | |
706 | loff_t last_pos; | |
707 | __u32 curr_hash; | |
708 | __u32 curr_minor_hash; | |
709 | __u32 next_hash; | |
710 | }; | |
711 | ||
712 | /* | |
713 | * Special error return code only used by dx_probe() and its callers. | |
714 | */ | |
715 | #define ERR_BAD_DX_DIR -75000 | |
716 | ||
717 | /* | |
718 | * Function prototypes | |
719 | */ | |
720 | ||
721 | /* | |
722 | * Ok, these declarations are also in <linux/kernel.h> but none of the | |
723 | * ext3 source programs needs to include it so they are duplicated here. | |
724 | */ | |
725 | # define NORET_TYPE /**/ | |
726 | # define ATTRIB_NORET __attribute__((noreturn)) | |
727 | # define NORET_AND noreturn, | |
728 | ||
729 | /* balloc.c */ | |
730 | extern int ext3_bg_has_super(struct super_block *sb, int group); | |
731 | extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group); | |
732 | extern int ext3_new_block (handle_t *, struct inode *, unsigned long, int *); | |
b54e41ec MC |
733 | extern int ext3_new_blocks (handle_t *, struct inode *, unsigned long, |
734 | unsigned long *, int *); | |
1da177e4 LT |
735 | extern void ext3_free_blocks (handle_t *, struct inode *, unsigned long, |
736 | unsigned long); | |
737 | extern void ext3_free_blocks_sb (handle_t *, struct super_block *, | |
738 | unsigned long, unsigned long, int *); | |
739 | extern unsigned long ext3_count_free_blocks (struct super_block *); | |
740 | extern void ext3_check_blocks_bitmap (struct super_block *); | |
741 | extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb, | |
742 | unsigned int block_group, | |
743 | struct buffer_head ** bh); | |
744 | extern int ext3_should_retry_alloc(struct super_block *sb, int *retries); | |
745 | extern void ext3_init_block_alloc_info(struct inode *); | |
746 | extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv); | |
747 | ||
748 | /* dir.c */ | |
749 | extern int ext3_check_dir_entry(const char *, struct inode *, | |
750 | struct ext3_dir_entry_2 *, | |
751 | struct buffer_head *, unsigned long); | |
752 | extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash, | |
753 | __u32 minor_hash, | |
754 | struct ext3_dir_entry_2 *dirent); | |
755 | extern void ext3_htree_free_dir_info(struct dir_private_info *p); | |
756 | ||
757 | /* fsync.c */ | |
758 | extern int ext3_sync_file (struct file *, struct dentry *, int); | |
759 | ||
760 | /* hash.c */ | |
761 | extern int ext3fs_dirhash(const char *name, int len, struct | |
762 | dx_hash_info *hinfo); | |
763 | ||
764 | /* ialloc.c */ | |
765 | extern struct inode * ext3_new_inode (handle_t *, struct inode *, int); | |
766 | extern void ext3_free_inode (handle_t *, struct inode *); | |
767 | extern struct inode * ext3_orphan_get (struct super_block *, unsigned long); | |
768 | extern unsigned long ext3_count_free_inodes (struct super_block *); | |
769 | extern unsigned long ext3_count_dirs (struct super_block *); | |
770 | extern void ext3_check_inodes_bitmap (struct super_block *); | |
771 | extern unsigned long ext3_count_free (struct buffer_head *, unsigned); | |
772 | ||
773 | ||
774 | /* inode.c */ | |
d8733c29 AM |
775 | int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int); |
776 | struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *); | |
777 | struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *); | |
89747d36 MC |
778 | int ext3_get_blocks_handle(handle_t *handle, struct inode *inode, |
779 | sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, | |
780 | int create, int extend_disksize); | |
1da177e4 LT |
781 | |
782 | extern void ext3_read_inode (struct inode *); | |
783 | extern int ext3_write_inode (struct inode *, int); | |
784 | extern int ext3_setattr (struct dentry *, struct iattr *); | |
785 | extern void ext3_delete_inode (struct inode *); | |
786 | extern int ext3_sync_inode (handle_t *, struct inode *); | |
787 | extern void ext3_discard_reservation (struct inode *); | |
788 | extern void ext3_dirty_inode(struct inode *); | |
789 | extern int ext3_change_inode_journal_flag(struct inode *, int); | |
790 | extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *); | |
791 | extern void ext3_truncate (struct inode *); | |
792 | extern void ext3_set_inode_flags(struct inode *); | |
793 | extern void ext3_set_aops(struct inode *inode); | |
794 | ||
795 | /* ioctl.c */ | |
796 | extern int ext3_ioctl (struct inode *, struct file *, unsigned int, | |
797 | unsigned long); | |
798 | ||
799 | /* namei.c */ | |
800 | extern int ext3_orphan_add(handle_t *, struct inode *); | |
801 | extern int ext3_orphan_del(handle_t *, struct inode *); | |
802 | extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash, | |
803 | __u32 start_minor_hash, __u32 *next_hash); | |
804 | ||
805 | /* resize.c */ | |
806 | extern int ext3_group_add(struct super_block *sb, | |
807 | struct ext3_new_group_data *input); | |
808 | extern int ext3_group_extend(struct super_block *sb, | |
809 | struct ext3_super_block *es, | |
810 | unsigned long n_blocks_count); | |
811 | ||
812 | /* super.c */ | |
813 | extern void ext3_error (struct super_block *, const char *, const char *, ...) | |
814 | __attribute__ ((format (printf, 3, 4))); | |
815 | extern void __ext3_std_error (struct super_block *, const char *, int); | |
816 | extern void ext3_abort (struct super_block *, const char *, const char *, ...) | |
817 | __attribute__ ((format (printf, 3, 4))); | |
818 | extern void ext3_warning (struct super_block *, const char *, const char *, ...) | |
819 | __attribute__ ((format (printf, 3, 4))); | |
820 | extern void ext3_update_dynamic_rev (struct super_block *sb); | |
821 | ||
822 | #define ext3_std_error(sb, errno) \ | |
823 | do { \ | |
824 | if ((errno)) \ | |
825 | __ext3_std_error((sb), __FUNCTION__, (errno)); \ | |
826 | } while (0) | |
827 | ||
828 | /* | |
829 | * Inodes and files operations | |
830 | */ | |
831 | ||
832 | /* dir.c */ | |
4b6f5d20 | 833 | extern const struct file_operations ext3_dir_operations; |
1da177e4 LT |
834 | |
835 | /* file.c */ | |
836 | extern struct inode_operations ext3_file_inode_operations; | |
4b6f5d20 | 837 | extern const struct file_operations ext3_file_operations; |
1da177e4 LT |
838 | |
839 | /* namei.c */ | |
840 | extern struct inode_operations ext3_dir_inode_operations; | |
841 | extern struct inode_operations ext3_special_inode_operations; | |
842 | ||
843 | /* symlink.c */ | |
844 | extern struct inode_operations ext3_symlink_inode_operations; | |
845 | extern struct inode_operations ext3_fast_symlink_inode_operations; | |
846 | ||
847 | ||
848 | #endif /* __KERNEL__ */ | |
849 | ||
850 | #endif /* _LINUX_EXT3_FS_H */ |