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