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Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-mmc
[mirror_ubuntu-zesty-kernel.git] / include / linux / ext3_fs.h
CommitLineData
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>
e18fa700 20#include <linux/magic.h>
1da177e4
LT		 21
22/*
23 * The second extended filesystem constants/structures
24 */
25
26/*
27 * Define EXT3FS_DEBUG to produce debug messages
28 */
29#undef EXT3FS_DEBUG
30
31/*
32 * Define EXT3_RESERVATION to reserve data blocks for expanding files
33 */
34#define EXT3_DEFAULT_RESERVE_BLOCKS 8
b54e41ec
MC		 35/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
36#define EXT3_MAX_RESERVE_BLOCKS 1027
1da177e4
LT		 37#define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
38/*
39 * Always enable hashed directories
40 */
41#define CONFIG_EXT3_INDEX
42
43/*
44 * Debug code
45 */
46#ifdef EXT3FS_DEBUG
47#define ext3_debug(f, a...) \
48 do { \
49 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
50 __FILE__, __LINE__, __FUNCTION__); \
51 printk (KERN_DEBUG f, ## a); \
52 } while (0)
53#else
54#define ext3_debug(f, a...) do {} while (0)
55#endif
56
57/*
58 * Special inodes numbers
59 */
60#define EXT3_BAD_INO 1 /* Bad blocks inode */
61#define EXT3_ROOT_INO 2 /* Root inode */
62#define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
63#define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
64#define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
65#define EXT3_JOURNAL_INO 8 /* Journal inode */
66
67/* First non-reserved inode for old ext3 filesystems */
68#define EXT3_GOOD_OLD_FIRST_INO 11
69
1da177e4
LT		 70/*
71 * Maximal count of links to a file
72 */
73#define EXT3_LINK_MAX 32000
74
75/*
76 * Macro-instructions used to manage several block sizes
77 */
78#define EXT3_MIN_BLOCK_SIZE 1024
79#define EXT3_MAX_BLOCK_SIZE 4096
80#define EXT3_MIN_BLOCK_LOG_SIZE 10
81#ifdef __KERNEL__
82# define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
83#else
84# define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
85#endif
86#define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
87#ifdef __KERNEL__
88# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
89#else
90# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
91#endif
92#ifdef __KERNEL__
93#define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
94#define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
95#define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
96#else
97#define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
98 EXT3_GOOD_OLD_INODE_SIZE : \
99 (s)->s_inode_size)
100#define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
101 EXT3_GOOD_OLD_FIRST_INO : \
102 (s)->s_first_ino)
103#endif
104
105/*
106 * Macro-instructions used to manage fragments
107 */
108#define EXT3_MIN_FRAG_SIZE 1024
109#define EXT3_MAX_FRAG_SIZE 4096
110#define EXT3_MIN_FRAG_LOG_SIZE 10
111#ifdef __KERNEL__
112# define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
113# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
114#else
115# define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
116# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
117#endif
118
119/*
120 * Structure of a blocks group descriptor
121 */
122struct ext3_group_desc
123{
124 __le32 bg_block_bitmap; /* Blocks bitmap block */
125 __le32 bg_inode_bitmap; /* Inodes bitmap block */
126 __le32 bg_inode_table; /* Inodes table block */
127 __le16 bg_free_blocks_count; /* Free blocks count */
128 __le16 bg_free_inodes_count; /* Free inodes count */
129 __le16 bg_used_dirs_count; /* Directories count */
130 __u16 bg_pad;
131 __le32 bg_reserved[3];
132};
133
134/*
135 * Macro-instructions used to manage group descriptors
136 */
137#ifdef __KERNEL__
138# define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
139# define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
140# define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
141# define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
142#else
143# define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
144# define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
145# define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
146#endif
147
148/*
149 * Constants relative to the data blocks
150 */
151#define EXT3_NDIR_BLOCKS 12
152#define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
153#define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
154#define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
155#define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
156
157/*
158 * Inode flags
159 */
160#define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
161#define EXT3_UNRM_FL 0x00000002 /* Undelete */
162#define EXT3_COMPR_FL 0x00000004 /* Compress file */
163#define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
164#define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
165#define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
166#define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
167#define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
168/* Reserved for compression usage... */
169#define EXT3_DIRTY_FL 0x00000100
170#define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
171#define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
172#define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
173/* End compression flags --- maybe not all used */
174#define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
175#define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
176#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
177#define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
178#define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
179#define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
180#define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
181
182#define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
183#define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
184
185/*
186 * Inode dynamic state flags
187 */
188#define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
189#define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
190#define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */
191
192/* Used to pass group descriptor data when online resize is done */
193struct ext3_new_group_input {
194 __u32 group; /* Group number for this data */
195 __u32 block_bitmap; /* Absolute block number of block bitmap */
196 __u32 inode_bitmap; /* Absolute block number of inode bitmap */
197 __u32 inode_table; /* Absolute block number of inode table start */
198 __u32 blocks_count; /* Total number of blocks in this group */
199 __u16 reserved_blocks; /* Number of reserved blocks in this group */
200 __u16 unused;
201};
202
203/* The struct ext3_new_group_input in kernel space, with free_blocks_count */
204struct ext3_new_group_data {
205 __u32 group;
206 __u32 block_bitmap;
207 __u32 inode_bitmap;
208 __u32 inode_table;
209 __u32 blocks_count;
210 __u16 reserved_blocks;
211 __u16 unused;
212 __u32 free_blocks_count;
213};
214
215
216/*
217 * ioctl commands
218 */
219#define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
220#define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
221#define EXT3_IOC_GETVERSION _IOR('f', 3, long)
222#define EXT3_IOC_SETVERSION _IOW('f', 4, long)
223#define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
224#define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
225#define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
226#define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
227#ifdef CONFIG_JBD_DEBUG
228#define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
229#endif
230#define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
231#define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
232
08c6a96f
JK		 233/*
234 * Mount options
235 */
236struct ext3_mount_options {
237 unsigned long s_mount_opt;
238 uid_t s_resuid;
239 gid_t s_resgid;
240 unsigned long s_commit_interval;
241#ifdef CONFIG_QUOTA
242 int s_jquota_fmt;
243 char *s_qf_names[MAXQUOTAS];
244#endif
245};
246
1da177e4
LT		 247/*
248 * Structure of an inode on the disk
249 */
250struct ext3_inode {
251 __le16 i_mode; /* File mode */
252 __le16 i_uid; /* Low 16 bits of Owner Uid */
253 __le32 i_size; /* Size in bytes */
254 __le32 i_atime; /* Access time */
255 __le32 i_ctime; /* Creation time */
256 __le32 i_mtime; /* Modification time */
257 __le32 i_dtime; /* Deletion Time */
258 __le16 i_gid; /* Low 16 bits of Group Id */
259 __le16 i_links_count; /* Links count */
260 __le32 i_blocks; /* Blocks count */
261 __le32 i_flags; /* File flags */
262 union {
263 struct {
264 __u32 l_i_reserved1;
265 } linux1;
266 struct {
267 __u32 h_i_translator;
268 } hurd1;
269 struct {
270 __u32 m_i_reserved1;
271 } masix1;
272 } osd1; /* OS dependent 1 */
273 __le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
274 __le32 i_generation; /* File version (for NFS) */
275 __le32 i_file_acl; /* File ACL */
276 __le32 i_dir_acl; /* Directory ACL */
277 __le32 i_faddr; /* Fragment address */
278 union {
279 struct {
280 __u8 l_i_frag; /* Fragment number */
281 __u8 l_i_fsize; /* Fragment size */
282 __u16 i_pad1;
283 __le16 l_i_uid_high; /* these 2 fields */
284 __le16 l_i_gid_high; /* were reserved2[0] */
285 __u32 l_i_reserved2;
286 } linux2;
287 struct {
288 __u8 h_i_frag; /* Fragment number */
289 __u8 h_i_fsize; /* Fragment size */
290 __u16 h_i_mode_high;
291 __u16 h_i_uid_high;
292 __u16 h_i_gid_high;
293 __u32 h_i_author;
294 } hurd2;
295 struct {
296 __u8 m_i_frag; /* Fragment number */
297 __u8 m_i_fsize; /* Fragment size */
298 __u16 m_pad1;
299 __u32 m_i_reserved2[2];
300 } masix2;
301 } osd2; /* OS dependent 2 */
302 __le16 i_extra_isize;
303 __le16 i_pad1;
304};
305
306#define i_size_high i_dir_acl
307
308#if defined(__KERNEL__) || defined(__linux__)
309#define i_reserved1 osd1.linux1.l_i_reserved1
310#define i_frag osd2.linux2.l_i_frag
311#define i_fsize osd2.linux2.l_i_fsize
312#define i_uid_low i_uid
313#define i_gid_low i_gid
314#define i_uid_high osd2.linux2.l_i_uid_high
315#define i_gid_high osd2.linux2.l_i_gid_high
316#define i_reserved2 osd2.linux2.l_i_reserved2
317
318#elif defined(__GNU__)
319
320#define i_translator osd1.hurd1.h_i_translator
321#define i_frag osd2.hurd2.h_i_frag;
322#define i_fsize osd2.hurd2.h_i_fsize;
323#define i_uid_high osd2.hurd2.h_i_uid_high
324#define i_gid_high osd2.hurd2.h_i_gid_high
325#define i_author osd2.hurd2.h_i_author
326
327#elif defined(__masix__)
328
329#define i_reserved1 osd1.masix1.m_i_reserved1
330#define i_frag osd2.masix2.m_i_frag
331#define i_fsize osd2.masix2.m_i_fsize
332#define i_reserved2 osd2.masix2.m_i_reserved2
333
334#endif /* defined(__KERNEL__) || defined(__linux__) */
335
336/*
337 * File system states
338 */
339#define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
340#define EXT3_ERROR_FS 0x0002 /* Errors detected */
341#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
342
343/*
344 * Mount flags
345 */
346#define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */
347#define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
348#define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */
349#define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */
350#define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
351#define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
352#define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
353#define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
354#define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
355#define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */
356#define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
357#define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
358#define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
359#define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
360#define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
361#define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
362#define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
363#define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
364#define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
365#define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
366#define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */
1f54587b 367#define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
8fc2751b
MB		 368#define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
369#define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
1da177e4
LT		 370
371/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
372#ifndef _LINUX_EXT2_FS_H
373#define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
374#define set_opt(o, opt) o |= EXT3_MOUNT_##opt
375#define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
376 EXT3_MOUNT_##opt)
377#else
378#define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
379#define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
380#define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
381#endif
382
383#define ext3_set_bit ext2_set_bit
384#define ext3_set_bit_atomic ext2_set_bit_atomic
385#define ext3_clear_bit ext2_clear_bit
386#define ext3_clear_bit_atomic ext2_clear_bit_atomic
387#define ext3_test_bit ext2_test_bit
388#define ext3_find_first_zero_bit ext2_find_first_zero_bit
389#define ext3_find_next_zero_bit ext2_find_next_zero_bit
390
391/*
392 * Maximal mount counts between two filesystem checks
393 */
394#define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
395#define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
396
397/*
398 * Behaviour when detecting errors
399 */
400#define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
401#define EXT3_ERRORS_RO 2 /* Remount fs read-only */
402#define EXT3_ERRORS_PANIC 3 /* Panic */
403#define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
404
405/*
406 * Structure of the super block
407 */
408struct ext3_super_block {
409/*00*/ __le32 s_inodes_count; /* Inodes count */
410 __le32 s_blocks_count; /* Blocks count */
411 __le32 s_r_blocks_count; /* Reserved blocks count */
412 __le32 s_free_blocks_count; /* Free blocks count */
413/*10*/ __le32 s_free_inodes_count; /* Free inodes count */
414 __le32 s_first_data_block; /* First Data Block */
415 __le32 s_log_block_size; /* Block size */
416 __le32 s_log_frag_size; /* Fragment size */
417/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
418 __le32 s_frags_per_group; /* # Fragments per group */
419 __le32 s_inodes_per_group; /* # Inodes per group */
420 __le32 s_mtime; /* Mount time */
421/*30*/ __le32 s_wtime; /* Write time */
422 __le16 s_mnt_count; /* Mount count */
423 __le16 s_max_mnt_count; /* Maximal mount count */
424 __le16 s_magic; /* Magic signature */
425 __le16 s_state; /* File system state */
426 __le16 s_errors; /* Behaviour when detecting errors */
427 __le16 s_minor_rev_level; /* minor revision level */
428/*40*/ __le32 s_lastcheck; /* time of last check */
429 __le32 s_checkinterval; /* max. time between checks */
430 __le32 s_creator_os; /* OS */
431 __le32 s_rev_level; /* Revision level */
432/*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
433 __le16 s_def_resgid; /* Default gid for reserved blocks */
434 /*
435 * These fields are for EXT3_DYNAMIC_REV superblocks only.
436 *
437 * Note: the difference between the compatible feature set and
438 * the incompatible feature set is that if there is a bit set
439 * in the incompatible feature set that the kernel doesn't
440 * know about, it should refuse to mount the filesystem.
441 *
442 * e2fsck's requirements are more strict; if it doesn't know
443 * about a feature in either the compatible or incompatible
444 * feature set, it must abort and not try to meddle with
445 * things it doesn't understand...
446 */
447 __le32 s_first_ino; /* First non-reserved inode */
448 __le16 s_inode_size; /* size of inode structure */
449 __le16 s_block_group_nr; /* block group # of this superblock */
450 __le32 s_feature_compat; /* compatible feature set */
451/*60*/ __le32 s_feature_incompat; /* incompatible feature set */
452 __le32 s_feature_ro_compat; /* readonly-compatible feature set */
453/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
454/*78*/ char s_volume_name[16]; /* volume name */
455/*88*/ char s_last_mounted[64]; /* directory where last mounted */
456/*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
457 /*
458 * Performance hints. Directory preallocation should only
459 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
460 */
461 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
462 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
a4e4de36 463 __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */
1da177e4
LT		 464 /*
465 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
466 */
467/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
468/*E0*/ __le32 s_journal_inum; /* inode number of journal file */
469 __le32 s_journal_dev; /* device number of journal file */
470 __le32 s_last_orphan; /* start of list of inodes to delete */
471 __le32 s_hash_seed[4]; /* HTREE hash seed */
472 __u8 s_def_hash_version; /* Default hash version to use */
473 __u8 s_reserved_char_pad;
474 __u16 s_reserved_word_pad;
475 __le32 s_default_mount_opts;
e9ad5620 476 __le32 s_first_meta_bg; /* First metablock block group */
1da177e4
LT		 477 __u32 s_reserved[190]; /* Padding to the end of the block */
478};
479
480#ifdef __KERNEL__
d85004eb
DW		 481#include <linux/ext3_fs_i.h>
482#include <linux/ext3_fs_sb.h>
1da177e4
LT		 483static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
484{
485 return sb->s_fs_info;
486}
487static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
488{
489 return container_of(inode, struct ext3_inode_info, vfs_inode);
490}
2ccb48eb
NB		 491
492static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
493{
494 return ino == EXT3_ROOT_INO ||
495 ino == EXT3_JOURNAL_INO ||
496 ino == EXT3_RESIZE_INO ||
497 (ino >= EXT3_FIRST_INO(sb) &&
498 ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
499}
1da177e4
LT		 500#else
501/* Assume that user mode programs are passing in an ext3fs superblock, not
502 * a kernel struct super_block. This will allow us to call the feature-test
503 * macros from user land. */
504#define EXT3_SB(sb) (sb)
505#endif
506
507#define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
508
509/*
510 * Codes for operating systems
511 */
512#define EXT3_OS_LINUX 0
513#define EXT3_OS_HURD 1
514#define EXT3_OS_MASIX 2
515#define EXT3_OS_FREEBSD 3
516#define EXT3_OS_LITES 4
517
518/*
519 * Revision levels
520 */
521#define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
522#define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
523
524#define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
525#define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
526
527#define EXT3_GOOD_OLD_INODE_SIZE 128
528
529/*
530 * Feature set definitions
531 */
532
533#define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
534 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
535#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
536 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
537#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
538 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
539#define EXT3_SET_COMPAT_FEATURE(sb,mask) \
540 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
541#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
542 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
543#define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
544 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
545#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
546 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
547#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
548 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
549#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
550 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
551
552#define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
553#define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
554#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
555#define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
556#define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
557#define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
558
559#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
560#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
561#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
562
563#define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
564#define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
565#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
566#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
567#define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
568
569#define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
570#define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
571 EXT3_FEATURE_INCOMPAT_RECOVER| \
572 EXT3_FEATURE_INCOMPAT_META_BG)
573#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
574 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
575 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
576
577/*
578 * Default values for user and/or group using reserved blocks
579 */
580#define EXT3_DEF_RESUID 0
581#define EXT3_DEF_RESGID 0
582
583/*
584 * Default mount options
585 */
586#define EXT3_DEFM_DEBUG 0x0001
587#define EXT3_DEFM_BSDGROUPS 0x0002
588#define EXT3_DEFM_XATTR_USER 0x0004
589#define EXT3_DEFM_ACL 0x0008
590#define EXT3_DEFM_UID16 0x0010
591#define EXT3_DEFM_JMODE 0x0060
592#define EXT3_DEFM_JMODE_DATA 0x0020
593#define EXT3_DEFM_JMODE_ORDERED 0x0040
594#define EXT3_DEFM_JMODE_WBACK 0x0060
595
596/*
597 * Structure of a directory entry
598 */
599#define EXT3_NAME_LEN 255
600
601struct ext3_dir_entry {
602 __le32 inode; /* Inode number */
603 __le16 rec_len; /* Directory entry length */
604 __le16 name_len; /* Name length */
605 char name[EXT3_NAME_LEN]; /* File name */
606};
607
608/*
609 * The new version of the directory entry. Since EXT3 structures are
610 * stored in intel byte order, and the name_len field could never be
611 * bigger than 255 chars, it's safe to reclaim the extra byte for the
612 * file_type field.
613 */
614struct ext3_dir_entry_2 {
615 __le32 inode; /* Inode number */
616 __le16 rec_len; /* Directory entry length */
617 __u8 name_len; /* Name length */
618 __u8 file_type;
619 char name[EXT3_NAME_LEN]; /* File name */
620};
621
622/*
623 * Ext3 directory file types. Only the low 3 bits are used. The
624 * other bits are reserved for now.
625 */
626#define EXT3_FT_UNKNOWN 0
627#define EXT3_FT_REG_FILE 1
628#define EXT3_FT_DIR 2
629#define EXT3_FT_CHRDEV 3
630#define EXT3_FT_BLKDEV 4
631#define EXT3_FT_FIFO 5
632#define EXT3_FT_SOCK 6
633#define EXT3_FT_SYMLINK 7
634
635#define EXT3_FT_MAX 8
636
637/*
638 * EXT3_DIR_PAD defines the directory entries boundaries
639 *
640 * NOTE: It must be a multiple of 4
641 */
642#define EXT3_DIR_PAD 4
643#define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
644#define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
645 ~EXT3_DIR_ROUND)
646/*
647 * Hash Tree Directory indexing
648 * (c) Daniel Phillips, 2001
649 */
650
651#ifdef CONFIG_EXT3_INDEX
652 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
653 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
654 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
655#define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
656#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
657#else
658 #define is_dx(dir) 0
659#define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
660#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
661#endif
662
663/* Legal values for the dx_root hash_version field: */
664
665#define DX_HASH_LEGACY 0
666#define DX_HASH_HALF_MD4 1
667#define DX_HASH_TEA 2
668
de654c97
DW		 669#ifdef __KERNEL__
670
1da177e4
LT		 671/* hash info structure used by the directory hash */
672struct dx_hash_info
673{
674 u32 hash;
675 u32 minor_hash;
676 int hash_version;
677 u32 *seed;
678};
679
680#define EXT3_HTREE_EOF 0x7fffffff
681
1da177e4
LT		 682/*
683 * Control parameters used by ext3_htree_next_block
684 */
685#define HASH_NB_ALWAYS 1
686
687
688/*
689 * Describe an inode's exact location on disk and in memory
690 */
691struct ext3_iloc
692{
693 struct buffer_head *bh;
694 unsigned long offset;
695 unsigned long block_group;
696};
697
698static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
699{
700 return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
701}
702
703/*
704 * This structure is stuffed into the struct file's private_data field
705 * for directories. It is where we put information so that we can do
706 * readdir operations in hash tree order.
707 */
708struct dir_private_info {
709 struct rb_root root;
710 struct rb_node *curr_node;
711 struct fname *extra_fname;
712 loff_t last_pos;
713 __u32 curr_hash;
714 __u32 curr_minor_hash;
715 __u32 next_hash;
716};
717
43d23f90
MC		 718/* calculate the first block number of the group */
719static inline ext3_fsblk_t
720ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
721{
722 return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
723 le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
724}
725
1da177e4
LT		 726/*
727 * Special error return code only used by dx_probe() and its callers.
728 */
729#define ERR_BAD_DX_DIR -75000
730
731/*
732 * Function prototypes
733 */
734
735/*
736 * Ok, these declarations are also in <linux/kernel.h> but none of the
737 * ext3 source programs needs to include it so they are duplicated here.
738 */
739# define NORET_TYPE /**/
740# define ATTRIB_NORET __attribute__((noreturn))
741# define NORET_AND noreturn,
742
743/* balloc.c */
744extern int ext3_bg_has_super(struct super_block *sb, int group);
745extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
1c2bf374
MC		 746extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
747 ext3_fsblk_t goal, int *errp);
748extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
749 ext3_fsblk_t goal, unsigned long *count, int *errp);
750extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
751 ext3_fsblk_t block, unsigned long count);
752extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
753 ext3_fsblk_t block, unsigned long count,
754 unsigned long *pdquot_freed_blocks);
43d23f90 755extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
1da177e4
LT		 756extern void ext3_check_blocks_bitmap (struct super_block *);
757extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
758 unsigned int block_group,
759 struct buffer_head ** bh);
760extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
761extern void ext3_init_block_alloc_info(struct inode *);
762extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
763
764/* dir.c */
765extern int ext3_check_dir_entry(const char *, struct inode *,
766 struct ext3_dir_entry_2 *,
767 struct buffer_head *, unsigned long);
768extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
769 __u32 minor_hash,
770 struct ext3_dir_entry_2 *dirent);
771extern void ext3_htree_free_dir_info(struct dir_private_info *p);
772
773/* fsync.c */
774extern int ext3_sync_file (struct file *, struct dentry *, int);
775
776/* hash.c */
777extern int ext3fs_dirhash(const char *name, int len, struct
778 dx_hash_info *hinfo);
779
780/* ialloc.c */
781extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
782extern void ext3_free_inode (handle_t *, struct inode *);
783extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
784extern unsigned long ext3_count_free_inodes (struct super_block *);
785extern unsigned long ext3_count_dirs (struct super_block *);
786extern void ext3_check_inodes_bitmap (struct super_block *);
787extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
788
789
790/* inode.c */
1c2bf374
MC		 791int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
792 struct buffer_head *bh, ext3_fsblk_t blocknr);
d8733c29
AM		 793struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
794struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
89747d36
MC		 795int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
796 sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
797 int create, int extend_disksize);
1da177e4
LT		 798
799extern void ext3_read_inode (struct inode *);
800extern int ext3_write_inode (struct inode *, int);
801extern int ext3_setattr (struct dentry *, struct iattr *);
802extern void ext3_delete_inode (struct inode *);
803extern int ext3_sync_inode (handle_t *, struct inode *);
804extern void ext3_discard_reservation (struct inode *);
805extern void ext3_dirty_inode(struct inode *);
806extern int ext3_change_inode_journal_flag(struct inode *, int);
807extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
808extern void ext3_truncate (struct inode *);
809extern void ext3_set_inode_flags(struct inode *);
810extern void ext3_set_aops(struct inode *inode);
811
812/* ioctl.c */
813extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
814 unsigned long);
815
816/* namei.c */
817extern int ext3_orphan_add(handle_t *, struct inode *);
818extern int ext3_orphan_del(handle_t *, struct inode *);
819extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
820 __u32 start_minor_hash, __u32 *next_hash);
821
822/* resize.c */
823extern int ext3_group_add(struct super_block *sb,
824 struct ext3_new_group_data *input);
825extern int ext3_group_extend(struct super_block *sb,
826 struct ext3_super_block *es,
43d23f90 827 ext3_fsblk_t n_blocks_count);
1da177e4
LT		 828
829/* super.c */
830extern void ext3_error (struct super_block *, const char *, const char *, ...)
831 __attribute__ ((format (printf, 3, 4)));
832extern void __ext3_std_error (struct super_block *, const char *, int);
833extern void ext3_abort (struct super_block *, const char *, const char *, ...)
834 __attribute__ ((format (printf, 3, 4)));
835extern void ext3_warning (struct super_block *, const char *, const char *, ...)
836 __attribute__ ((format (printf, 3, 4)));
837extern void ext3_update_dynamic_rev (struct super_block *sb);
838
839#define ext3_std_error(sb, errno) \
840do { \
841 if ((errno)) \
842 __ext3_std_error((sb), __FUNCTION__, (errno)); \
843} while (0)
844
845/*
846 * Inodes and files operations
847 */
848
849/* dir.c */
4b6f5d20 850extern const struct file_operations ext3_dir_operations;
1da177e4
LT		 851
852/* file.c */
853extern struct inode_operations ext3_file_inode_operations;
4b6f5d20 854extern const struct file_operations ext3_file_operations;
1da177e4
LT		 855
856/* namei.c */
857extern struct inode_operations ext3_dir_inode_operations;
858extern struct inode_operations ext3_special_inode_operations;
859
860/* symlink.c */
861extern struct inode_operations ext3_symlink_inode_operations;
862extern struct inode_operations ext3_fast_symlink_inode_operations;
863
864
865#endif /* __KERNEL__ */
866
867#endif /* _LINUX_EXT3_FS_H */
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