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>
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
34 /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
35 #define EXT3_MAX_RESERVE_BLOCKS 1027
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
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
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 */
371 #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
372 #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
373 #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
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__
485 #include <linux/ext3_fs_i.h>
486 #include <linux/ext3_fs_sb.h>
EXT3_SB(struct super_block * sb)487 static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
488 {
489 return sb->s_fs_info;
490 }
EXT3_I(struct inode * inode)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
ext3_valid_inum(struct super_block * sb,unsigned long ino)496 static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
497 {
498 return ino == EXT3_ROOT_INO ||
499 ino == EXT3_JOURNAL_INO ||
500 ino == EXT3_RESIZE_INO ||
501 (ino >= EXT3_FIRST_INO(sb) &&
502 ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
503 }
504 #else
505 /* Assume that user mode programs are passing in an ext3fs superblock, not
506 * a kernel struct super_block. This will allow us to call the feature-test
507 * macros from user land. */
508 #define EXT3_SB(sb) (sb)
509 #endif
510
511 #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
512
513 /*
514 * Codes for operating systems
515 */
516 #define EXT3_OS_LINUX 0
517 #define EXT3_OS_HURD 1
518 #define EXT3_OS_MASIX 2
519 #define EXT3_OS_FREEBSD 3
520 #define EXT3_OS_LITES 4
521
522 /*
523 * Revision levels
524 */
525 #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
526 #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
527
528 #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
529 #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
530
531 #define EXT3_GOOD_OLD_INODE_SIZE 128
532
533 /*
534 * Feature set definitions
535 */
536
537 #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
538 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
539 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
540 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
541 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
542 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
543 #define EXT3_SET_COMPAT_FEATURE(sb,mask) \
544 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
545 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
546 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
547 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
548 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
549 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
550 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
551 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
552 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
553 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
554 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
555
556 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
557 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
558 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
559 #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
560 #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
561 #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
562
563 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
564 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
565 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
566
567 #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
568 #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
569 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
570 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
571 #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
572
573 #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
574 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
575 EXT3_FEATURE_INCOMPAT_RECOVER| \
576 EXT3_FEATURE_INCOMPAT_META_BG)
577 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
578 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
579 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
580
581 /*
582 * Default values for user and/or group using reserved blocks
583 */
584 #define EXT3_DEF_RESUID 0
585 #define EXT3_DEF_RESGID 0
586
587 /*
588 * Default mount options
589 */
590 #define EXT3_DEFM_DEBUG 0x0001
591 #define EXT3_DEFM_BSDGROUPS 0x0002
592 #define EXT3_DEFM_XATTR_USER 0x0004
593 #define EXT3_DEFM_ACL 0x0008
594 #define EXT3_DEFM_UID16 0x0010
595 #define EXT3_DEFM_JMODE 0x0060
596 #define EXT3_DEFM_JMODE_DATA 0x0020
597 #define EXT3_DEFM_JMODE_ORDERED 0x0040
598 #define EXT3_DEFM_JMODE_WBACK 0x0060
599
600 /*
601 * Structure of a directory entry
602 */
603 #define EXT3_NAME_LEN 255
604
605 struct ext3_dir_entry {
606 __le32 inode; /* Inode number */
607 __le16 rec_len; /* Directory entry length */
608 __le16 name_len; /* Name length */
609 char name[EXT3_NAME_LEN]; /* File name */
610 };
611
612 /*
613 * The new version of the directory entry. Since EXT3 structures are
614 * stored in intel byte order, and the name_len field could never be
615 * bigger than 255 chars, it's safe to reclaim the extra byte for the
616 * file_type field.
617 */
618 struct ext3_dir_entry_2 {
619 __le32 inode; /* Inode number */
620 __le16 rec_len; /* Directory entry length */
621 __u8 name_len; /* Name length */
622 __u8 file_type;
623 char name[EXT3_NAME_LEN]; /* File name */
624 };
625
626 /*
627 * Ext3 directory file types. Only the low 3 bits are used. The
628 * other bits are reserved for now.
629 */
630 #define EXT3_FT_UNKNOWN 0
631 #define EXT3_FT_REG_FILE 1
632 #define EXT3_FT_DIR 2
633 #define EXT3_FT_CHRDEV 3
634 #define EXT3_FT_BLKDEV 4
635 #define EXT3_FT_FIFO 5
636 #define EXT3_FT_SOCK 6
637 #define EXT3_FT_SYMLINK 7
638
639 #define EXT3_FT_MAX 8
640
641 /*
642 * EXT3_DIR_PAD defines the directory entries boundaries
643 *
644 * NOTE: It must be a multiple of 4
645 */
646 #define EXT3_DIR_PAD 4
647 #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
648 #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
649 ~EXT3_DIR_ROUND)
650 /*
651 * Hash Tree Directory indexing
652 * (c) Daniel Phillips, 2001
653 */
654
655 #ifdef CONFIG_EXT3_INDEX
656 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
657 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
658 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
659 #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
660 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
661 #else
662 #define is_dx(dir) 0
663 #define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
664 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
665 #endif
666
667 /* Legal values for the dx_root hash_version field: */
668
669 #define DX_HASH_LEGACY 0
670 #define DX_HASH_HALF_MD4 1
671 #define DX_HASH_TEA 2
672
673 #ifdef __KERNEL__
674
675 /* hash info structure used by the directory hash */
676 struct dx_hash_info
677 {
678 u32 hash;
679 u32 minor_hash;
680 int hash_version;
681 u32 *seed;
682 };
683
684 #define EXT3_HTREE_EOF 0x7fffffff
685
686 /*
687 * Control parameters used by ext3_htree_next_block
688 */
689 #define HASH_NB_ALWAYS 1
690
691
692 /*
693 * Describe an inode's exact location on disk and in memory
694 */
695 struct ext3_iloc
696 {
697 struct buffer_head *bh;
698 unsigned long offset;
699 unsigned long block_group;
700 };
701
ext3_raw_inode(struct ext3_iloc * iloc)702 static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
703 {
704 return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
705 }
706
707 /*
708 * This structure is stuffed into the struct file's private_data field
709 * for directories. It is where we put information so that we can do
710 * readdir operations in hash tree order.
711 */
712 struct dir_private_info {
713 struct rb_root root;
714 struct rb_node *curr_node;
715 struct fname *extra_fname;
716 loff_t last_pos;
717 __u32 curr_hash;
718 __u32 curr_minor_hash;
719 __u32 next_hash;
720 };
721
722 /* calculate the first block number of the group */
723 static inline ext3_fsblk_t
ext3_group_first_block_no(struct super_block * sb,unsigned long group_no)724 ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
725 {
726 return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
727 le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
728 }
729
730 /*
731 * Special error return code only used by dx_probe() and its callers.
732 */
733 #define ERR_BAD_DX_DIR -75000
734
735 /*
736 * Function prototypes
737 */
738
739 /*
740 * Ok, these declarations are also in <linux/kernel.h> but none of the
741 * ext3 source programs needs to include it so they are duplicated here.
742 */
743 # define NORET_TYPE /**/
744 # define ATTRIB_NORET __attribute__((noreturn))
745 # define NORET_AND noreturn,
746
747 /* balloc.c */
748 extern int ext3_bg_has_super(struct super_block *sb, int group);
749 extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
750 extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
751 ext3_fsblk_t goal, int *errp);
752 extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
753 ext3_fsblk_t goal, unsigned long *count, int *errp);
754 extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
755 ext3_fsblk_t block, unsigned long count);
756 extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
757 ext3_fsblk_t block, unsigned long count,
758 unsigned long *pdquot_freed_blocks);
759 extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
760 extern void ext3_check_blocks_bitmap (struct super_block *);
761 extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
762 unsigned int block_group,
763 struct buffer_head ** bh);
764 extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
765 extern void ext3_init_block_alloc_info(struct inode *);
766 extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
767
768 /* dir.c */
769 extern int ext3_check_dir_entry(const char *, struct inode *,
770 struct ext3_dir_entry_2 *,
771 struct buffer_head *, unsigned long);
772 extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
773 __u32 minor_hash,
774 struct ext3_dir_entry_2 *dirent);
775 extern void ext3_htree_free_dir_info(struct dir_private_info *p);
776
777 /* fsync.c */
778 extern int ext3_sync_file (struct file *, struct dentry *, int);
779
780 /* hash.c */
781 extern int ext3fs_dirhash(const char *name, int len, struct
782 dx_hash_info *hinfo);
783
784 /* ialloc.c */
785 extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
786 extern void ext3_free_inode (handle_t *, struct inode *);
787 extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
788 extern unsigned long ext3_count_free_inodes (struct super_block *);
789 extern unsigned long ext3_count_dirs (struct super_block *);
790 extern void ext3_check_inodes_bitmap (struct super_block *);
791 extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
792
793
794 /* inode.c */
795 int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
796 struct buffer_head *bh, ext3_fsblk_t blocknr);
797 struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
798 struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
799 int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
800 sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
801 int create, int extend_disksize);
802
803 extern void ext3_read_inode (struct inode *);
804 extern int ext3_write_inode (struct inode *, int);
805 extern int ext3_setattr (struct dentry *, struct iattr *);
806 extern void ext3_delete_inode (struct inode *);
807 extern int ext3_sync_inode (handle_t *, struct inode *);
808 extern void ext3_discard_reservation (struct inode *);
809 extern void ext3_dirty_inode(struct inode *);
810 extern int ext3_change_inode_journal_flag(struct inode *, int);
811 extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
812 extern void ext3_truncate (struct inode *);
813 extern void ext3_set_inode_flags(struct inode *);
814 extern void ext3_set_aops(struct inode *inode);
815
816 /* ioctl.c */
817 extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
818 unsigned long);
819
820 /* namei.c */
821 extern int ext3_orphan_add(handle_t *, struct inode *);
822 extern int ext3_orphan_del(handle_t *, struct inode *);
823 extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
824 __u32 start_minor_hash, __u32 *next_hash);
825
826 /* resize.c */
827 extern int ext3_group_add(struct super_block *sb,
828 struct ext3_new_group_data *input);
829 extern int ext3_group_extend(struct super_block *sb,
830 struct ext3_super_block *es,
831 ext3_fsblk_t n_blocks_count);
832
833 /* super.c */
834 extern void ext3_error (struct super_block *, const char *, const char *, ...)
835 __attribute__ ((format (printf, 3, 4)));
836 extern void __ext3_std_error (struct super_block *, const char *, int);
837 extern void ext3_abort (struct super_block *, const char *, const char *, ...)
838 __attribute__ ((format (printf, 3, 4)));
839 extern void ext3_warning (struct super_block *, const char *, const char *, ...)
840 __attribute__ ((format (printf, 3, 4)));
841 extern void ext3_update_dynamic_rev (struct super_block *sb);
842
843 #define ext3_std_error(sb, errno) \
844 do { \
845 if ((errno)) \
846 __ext3_std_error((sb), __FUNCTION__, (errno)); \
847 } while (0)
848
849 /*
850 * Inodes and files operations
851 */
852
853 /* dir.c */
854 extern const struct file_operations ext3_dir_operations;
855
856 /* file.c */
857 extern struct inode_operations ext3_file_inode_operations;
858 extern const struct file_operations ext3_file_operations;
859
860 /* namei.c */
861 extern struct inode_operations ext3_dir_inode_operations;
862 extern struct inode_operations ext3_special_inode_operations;
863
864 /* symlink.c */
865 extern struct inode_operations ext3_symlink_inode_operations;
866 extern struct inode_operations ext3_fast_symlink_inode_operations;
867
868
869 #endif /* __KERNEL__ */
870
871 #endif /* _LINUX_EXT3_FS_H */
872