2 * linux/include/linux/ext3_fs.h
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)
11 * linux/include/linux/minix_fs.h
13 * Copyright (C) 1991, 1992 Linus Torvalds
16 #ifndef _LINUX_EXT3_FS_H
17 #define _LINUX_EXT3_FS_H
19 #include <linux/types.h>
20 #include <linux/ext3_fs_i.h>
21 #include <linux/ext3_fs_sb.h>
27 * The second extended filesystem constants/structures
31 * Define EXT3FS_DEBUG to produce debug messages
36 * Define EXT3_PREALLOCATE to preallocate data blocks for expanding files
38 #undef EXT3_PREALLOCATE /* @@@ Fix this! */
39 #define EXT3_DEFAULT_PREALLOC_BLOCKS 8
42 * Always enable hashed directories
44 #define CONFIG_EXT3_INDEX
50 #define ext3_debug(f, a...) \
52 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
53 __FILE__, __LINE__, __FUNCTION__); \
54 printk (KERN_DEBUG f, ## a); \
57 #define ext3_debug(f, a...) do {} while (0)
61 * Special inodes numbers
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 */
70 /* First non-reserved inode for old ext3 filesystems */
71 #define EXT3_GOOD_OLD_FIRST_INO 11
74 * The second extended file system magic number
76 #define EXT3_SUPER_MAGIC 0xEF53
79 * Maximal count of links to a file
81 #define EXT3_LINK_MAX 32000
84 * Macro-instructions used to manage several block sizes
86 #define EXT3_MIN_BLOCK_SIZE 1024
87 #define EXT3_MAX_BLOCK_SIZE 4096
88 #define EXT3_MIN_BLOCK_LOG_SIZE 10
90 # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
92 # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
94 #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
96 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
98 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
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)
105 #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
106 EXT3_GOOD_OLD_INODE_SIZE : \
108 #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
109 EXT3_GOOD_OLD_FIRST_INO : \
114 * Macro-instructions used to manage fragments
116 #define EXT3_MIN_FRAG_SIZE 1024
117 #define EXT3_MAX_FRAG_SIZE 4096
118 #define EXT3_MIN_FRAG_LOG_SIZE 10
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)
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))
128 * Structure of a blocks group descriptor
130 struct ext3_group_desc
132 __u32 bg_block_bitmap; /* Blocks bitmap block */
133 __u32 bg_inode_bitmap; /* Inodes bitmap block */
134 __u32 bg_inode_table; /* Inodes table block */
135 __u16 bg_free_blocks_count; /* Free blocks count */
136 __u16 bg_free_inodes_count; /* Free inodes count */
137 __u16 bg_used_dirs_count; /* Directories count */
139 __u32 bg_reserved[3];
143 * Macro-instructions used to manage group descriptors
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)
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)
157 * Constants relative to the data blocks
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)
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_BARRIER_FL 0x04000000 /* Barrier for chroot() */
189 #define EXT3_IUNLINK_FL 0x08000000 /* Immutable unlink */
190 #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
192 #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
193 #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
196 * Inode dynamic state flags
198 #define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
199 #define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
204 #define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
205 #define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
206 #define EXT3_IOC_GETVERSION _IOR('f', 3, long)
207 #define EXT3_IOC_SETVERSION _IOW('f', 4, long)
208 #define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
209 #define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
210 #ifdef CONFIG_JBD_DEBUG
211 #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
213 #ifdef CONFIG_VSERVER_LEGACY
214 #define EXT3_IOC_SETXID FIOC_SETXIDJ
218 * Structure of an inode on the disk
221 __u16 i_mode; /* File mode */
222 __u16 i_uid; /* Low 16 bits of Owner Uid */
223 __u32 i_size; /* Size in bytes */
224 __u32 i_atime; /* Access time */
225 __u32 i_ctime; /* Creation time */
226 __u32 i_mtime; /* Modification time */
227 __u32 i_dtime; /* Deletion Time */
228 __u16 i_gid; /* Low 16 bits of Group Id */
229 __u16 i_links_count; /* Links count */
230 __u32 i_blocks; /* Blocks count */
231 __u32 i_flags; /* File flags */
237 __u32 h_i_translator;
242 } osd1; /* OS dependent 1 */
243 __u32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
244 __u32 i_generation; /* File version (for NFS) */
245 __u32 i_file_acl; /* File ACL */
246 __u32 i_dir_acl; /* Directory ACL */
247 __u32 i_faddr; /* Fragment address */
250 __u8 l_i_frag; /* Fragment number */
251 __u8 l_i_fsize; /* Fragment size */
252 __u16 l_i_xid; /* LRU Context */
253 __u16 l_i_uid_high; /* these 2 fields */
254 __u16 l_i_gid_high; /* were reserved2[0] */
258 __u8 h_i_frag; /* Fragment number */
259 __u8 h_i_fsize; /* Fragment size */
266 __u8 m_i_frag; /* Fragment number */
267 __u8 m_i_fsize; /* Fragment size */
269 __u32 m_i_reserved2[2];
271 } osd2; /* OS dependent 2 */
274 #define i_size_high i_dir_acl
276 #if defined(__KERNEL__) || defined(__linux__)
277 #define i_reserved1 osd1.linux1.l_i_reserved1
278 #define i_frag osd2.linux2.l_i_frag
279 #define i_fsize osd2.linux2.l_i_fsize
280 #define i_uid_low i_uid
281 #define i_gid_low i_gid
282 #define i_uid_high osd2.linux2.l_i_uid_high
283 #define i_gid_high osd2.linux2.l_i_gid_high
284 #define i_raw_xid osd2.linux2.l_i_xid
285 #define i_reserved2 osd2.linux2.l_i_reserved2
287 #elif defined(__GNU__)
289 #define i_translator osd1.hurd1.h_i_translator
290 #define i_frag osd2.hurd2.h_i_frag;
291 #define i_fsize osd2.hurd2.h_i_fsize;
292 #define i_uid_high osd2.hurd2.h_i_uid_high
293 #define i_gid_high osd2.hurd2.h_i_gid_high
294 #define i_author osd2.hurd2.h_i_author
296 #elif defined(__masix__)
298 #define i_reserved1 osd1.masix1.m_i_reserved1
299 #define i_frag osd2.masix2.m_i_frag
300 #define i_fsize osd2.masix2.m_i_fsize
301 #define i_reserved2 osd2.masix2.m_i_reserved2
303 #endif /* defined(__KERNEL__) || defined(__linux__) */
308 #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
309 #define EXT3_ERROR_FS 0x0002 /* Errors detected */
310 #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
315 #define EXT3_MOUNT_CHECK 0x0001 /* Do mount-time checks */
316 #define EXT3_MOUNT_OLDALLOC 0x0002 /* Don't use the new Orlov allocator */
317 #define EXT3_MOUNT_GRPID 0x0004 /* Create files with directory's group */
318 #define EXT3_MOUNT_DEBUG 0x0008 /* Some debugging messages */
319 #define EXT3_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
320 #define EXT3_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
321 #define EXT3_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
322 #define EXT3_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
323 #define EXT3_MOUNT_NOLOAD 0x0100 /* Don't use existing journal*/
324 #define EXT3_MOUNT_ABORT 0x0200 /* Fatal error detected */
325 #define EXT3_MOUNT_DATA_FLAGS 0x0C00 /* Mode for data writes: */
326 #define EXT3_MOUNT_JOURNAL_DATA 0x0400 /* Write data to journal */
327 #define EXT3_MOUNT_ORDERED_DATA 0x0800 /* Flush data before commit */
328 #define EXT3_MOUNT_WRITEBACK_DATA 0x0C00 /* No data ordering */
329 #define EXT3_MOUNT_UPDATE_JOURNAL 0x1000 /* Update the journal format */
330 #define EXT3_MOUNT_NO_UID32 0x2000 /* Disable 32-bit UIDs */
331 #define EXT3_MOUNT_XATTR_USER 0x4000 /* Extended user attributes */
332 #define EXT3_MOUNT_POSIX_ACL 0x8000 /* POSIX Access Control Lists */
333 #define EXT3_MOUNT_TAG_XID (1<<16) /* Enable Context Tags */
335 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
336 #ifndef _LINUX_EXT2_FS_H
337 #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
338 #define set_opt(o, opt) o |= EXT3_MOUNT_##opt
339 #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
342 #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
343 #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
344 #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
347 #define ext3_set_bit ext2_set_bit
348 #define ext3_set_bit_atomic ext2_set_bit_atomic
349 #define ext3_clear_bit ext2_clear_bit
350 #define ext3_clear_bit_atomic ext2_clear_bit_atomic
351 #define ext3_test_bit ext2_test_bit
352 #define ext3_find_first_zero_bit ext2_find_first_zero_bit
353 #define ext3_find_next_zero_bit ext2_find_next_zero_bit
356 * Maximal mount counts between two filesystem checks
358 #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
359 #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
362 * Behaviour when detecting errors
364 #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
365 #define EXT3_ERRORS_RO 2 /* Remount fs read-only */
366 #define EXT3_ERRORS_PANIC 3 /* Panic */
367 #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
370 * Structure of the super block
372 struct ext3_super_block {
373 /*00*/ __u32 s_inodes_count; /* Inodes count */
374 __u32 s_blocks_count; /* Blocks count */
375 __u32 s_r_blocks_count; /* Reserved blocks count */
376 __u32 s_free_blocks_count; /* Free blocks count */
377 /*10*/ __u32 s_free_inodes_count; /* Free inodes count */
378 __u32 s_first_data_block; /* First Data Block */
379 __u32 s_log_block_size; /* Block size */
380 __s32 s_log_frag_size; /* Fragment size */
381 /*20*/ __u32 s_blocks_per_group; /* # Blocks per group */
382 __u32 s_frags_per_group; /* # Fragments per group */
383 __u32 s_inodes_per_group; /* # Inodes per group */
384 __u32 s_mtime; /* Mount time */
385 /*30*/ __u32 s_wtime; /* Write time */
386 __u16 s_mnt_count; /* Mount count */
387 __s16 s_max_mnt_count; /* Maximal mount count */
388 __u16 s_magic; /* Magic signature */
389 __u16 s_state; /* File system state */
390 __u16 s_errors; /* Behaviour when detecting errors */
391 __u16 s_minor_rev_level; /* minor revision level */
392 /*40*/ __u32 s_lastcheck; /* time of last check */
393 __u32 s_checkinterval; /* max. time between checks */
394 __u32 s_creator_os; /* OS */
395 __u32 s_rev_level; /* Revision level */
396 /*50*/ __u16 s_def_resuid; /* Default uid for reserved blocks */
397 __u16 s_def_resgid; /* Default gid for reserved blocks */
399 * These fields are for EXT3_DYNAMIC_REV superblocks only.
401 * Note: the difference between the compatible feature set and
402 * the incompatible feature set is that if there is a bit set
403 * in the incompatible feature set that the kernel doesn't
404 * know about, it should refuse to mount the filesystem.
406 * e2fsck's requirements are more strict; if it doesn't know
407 * about a feature in either the compatible or incompatible
408 * feature set, it must abort and not try to meddle with
409 * things it doesn't understand...
411 __u32 s_first_ino; /* First non-reserved inode */
412 __u16 s_inode_size; /* size of inode structure */
413 __u16 s_block_group_nr; /* block group # of this superblock */
414 __u32 s_feature_compat; /* compatible feature set */
415 /*60*/ __u32 s_feature_incompat; /* incompatible feature set */
416 __u32 s_feature_ro_compat; /* readonly-compatible feature set */
417 /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
418 /*78*/ char s_volume_name[16]; /* volume name */
419 /*88*/ char s_last_mounted[64]; /* directory where last mounted */
420 /*C8*/ __u32 s_algorithm_usage_bitmap; /* For compression */
422 * Performance hints. Directory preallocation should only
423 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
425 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
426 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
429 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
431 /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
432 /*E0*/ __u32 s_journal_inum; /* inode number of journal file */
433 __u32 s_journal_dev; /* device number of journal file */
434 __u32 s_last_orphan; /* start of list of inodes to delete */
435 __u32 s_hash_seed[4]; /* HTREE hash seed */
436 __u8 s_def_hash_version; /* Default hash version to use */
437 __u8 s_reserved_char_pad;
438 __u16 s_reserved_word_pad;
439 __u32 s_default_mount_opts;
440 __u32 s_first_meta_bg; /* First metablock block group */
441 __u32 s_reserved[190]; /* Padding to the end of the block */
445 static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
447 return sb->s_fs_info;
449 static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
451 return container_of(inode, struct ext3_inode_info, vfs_inode);
454 /* Assume that user mode programs are passing in an ext3fs superblock, not
455 * a kernel struct super_block. This will allow us to call the feature-test
456 * macros from user land. */
457 #define EXT3_SB(sb) (sb)
460 #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
463 * Codes for operating systems
465 #define EXT3_OS_LINUX 0
466 #define EXT3_OS_HURD 1
467 #define EXT3_OS_MASIX 2
468 #define EXT3_OS_FREEBSD 3
469 #define EXT3_OS_LITES 4
474 #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
475 #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
477 #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
478 #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
480 #define EXT3_GOOD_OLD_INODE_SIZE 128
483 * Feature set definitions
486 #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
487 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
488 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
489 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
490 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
491 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
492 #define EXT3_SET_COMPAT_FEATURE(sb,mask) \
493 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
494 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
495 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
496 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
497 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
498 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
499 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
500 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
501 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
502 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
503 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
505 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
506 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
507 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
508 #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
509 #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
510 #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
512 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
513 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
514 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
516 #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
517 #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
518 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
519 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
520 #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
522 #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
523 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
524 EXT3_FEATURE_INCOMPAT_RECOVER| \
525 EXT3_FEATURE_INCOMPAT_META_BG)
526 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
527 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
528 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
531 * Default values for user and/or group using reserved blocks
533 #define EXT3_DEF_RESUID 0
534 #define EXT3_DEF_RESGID 0
537 * Default mount options
539 #define EXT3_DEFM_DEBUG 0x0001
540 #define EXT3_DEFM_BSDGROUPS 0x0002
541 #define EXT3_DEFM_XATTR_USER 0x0004
542 #define EXT3_DEFM_ACL 0x0008
543 #define EXT3_DEFM_UID16 0x0010
544 #define EXT3_DEFM_JMODE 0x0060
545 #define EXT3_DEFM_JMODE_DATA 0x0020
546 #define EXT3_DEFM_JMODE_ORDERED 0x0040
547 #define EXT3_DEFM_JMODE_WBACK 0x0060
550 * Structure of a directory entry
552 #define EXT3_NAME_LEN 255
554 struct ext3_dir_entry {
555 __u32 inode; /* Inode number */
556 __u16 rec_len; /* Directory entry length */
557 __u16 name_len; /* Name length */
558 char name[EXT3_NAME_LEN]; /* File name */
562 * The new version of the directory entry. Since EXT3 structures are
563 * stored in intel byte order, and the name_len field could never be
564 * bigger than 255 chars, it's safe to reclaim the extra byte for the
567 struct ext3_dir_entry_2 {
568 __u32 inode; /* Inode number */
569 __u16 rec_len; /* Directory entry length */
570 __u8 name_len; /* Name length */
572 char name[EXT3_NAME_LEN]; /* File name */
576 * Ext3 directory file types. Only the low 3 bits are used. The
577 * other bits are reserved for now.
579 #define EXT3_FT_UNKNOWN 0
580 #define EXT3_FT_REG_FILE 1
581 #define EXT3_FT_DIR 2
582 #define EXT3_FT_CHRDEV 3
583 #define EXT3_FT_BLKDEV 4
584 #define EXT3_FT_FIFO 5
585 #define EXT3_FT_SOCK 6
586 #define EXT3_FT_SYMLINK 7
588 #define EXT3_FT_MAX 8
591 * EXT3_DIR_PAD defines the directory entries boundaries
593 * NOTE: It must be a multiple of 4
595 #define EXT3_DIR_PAD 4
596 #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
597 #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
600 * Hash Tree Directory indexing
601 * (c) Daniel Phillips, 2001
604 #ifdef CONFIG_EXT3_INDEX
605 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
606 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
607 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
608 #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
609 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
612 #define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
613 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
616 /* Legal values for the dx_root hash_version field: */
618 #define DX_HASH_LEGACY 0
619 #define DX_HASH_HALF_MD4 1
620 #define DX_HASH_TEA 2
622 /* hash info structure used by the directory hash */
631 #define EXT3_HTREE_EOF 0x7fffffff
635 * Control parameters used by ext3_htree_next_block
637 #define HASH_NB_ALWAYS 1
641 * Describe an inode's exact location on disk and in memory
645 struct buffer_head *bh;
646 unsigned long offset;
647 unsigned long block_group;
650 static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
652 return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
656 * This structure is stuffed into the struct file's private_data field
657 * for directories. It is where we put information so that we can do
658 * readdir operations in hash tree order.
660 struct dir_private_info {
662 struct rb_node *curr_node;
663 struct fname *extra_fname;
666 __u32 curr_minor_hash;
671 * Special error return code only used by dx_probe() and its callers.
673 #define ERR_BAD_DX_DIR -75000
676 * Function prototypes
680 * Ok, these declarations are also in <linux/kernel.h> but none of the
681 * ext3 source programs needs to include it so they are duplicated here.
683 # define NORET_TYPE /**/
684 # define ATTRIB_NORET __attribute__((noreturn))
685 # define NORET_AND noreturn,
688 extern int ext3_bg_has_super(struct super_block *sb, int group);
689 extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
690 extern int ext3_new_block (handle_t *, struct inode *, unsigned long,
691 __u32 *, __u32 *, int *);
692 extern void ext3_free_blocks (handle_t *, struct inode *, unsigned long,
694 extern unsigned long ext3_count_free_blocks (struct super_block *);
695 extern void ext3_check_blocks_bitmap (struct super_block *);
696 extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
697 unsigned int block_group,
698 struct buffer_head ** bh);
701 extern int ext3_check_dir_entry(const char *, struct inode *,
702 struct ext3_dir_entry_2 *,
703 struct buffer_head *, unsigned long);
704 extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
706 struct ext3_dir_entry_2 *dirent);
707 extern void ext3_htree_free_dir_info(struct dir_private_info *p);
710 extern int ext3_sync_file (struct file *, struct dentry *, int);
713 extern int ext3fs_dirhash(const char *name, int len, struct
714 dx_hash_info *hinfo);
717 extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
718 extern void ext3_free_inode (handle_t *, struct inode *);
719 extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
720 extern unsigned long ext3_count_free_inodes (struct super_block *);
721 extern unsigned long ext3_count_dirs (struct super_block *);
722 extern void ext3_check_inodes_bitmap (struct super_block *);
723 extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
727 extern int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int);
728 extern struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
729 extern struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
731 extern void ext3_read_inode (struct inode *);
732 extern void ext3_write_inode (struct inode *, int);
733 extern int ext3_setattr (struct dentry *, struct iattr *);
734 extern void ext3_put_inode (struct inode *);
735 extern void ext3_delete_inode (struct inode *);
736 extern int ext3_sync_inode (handle_t *, struct inode *);
737 extern void ext3_discard_prealloc (struct inode *);
738 extern void ext3_dirty_inode(struct inode *);
739 extern int ext3_change_inode_journal_flag(struct inode *, int);
740 extern void ext3_truncate (struct inode *);
741 extern void ext3_set_inode_flags(struct inode *);
742 extern void ext3_set_aops(struct inode *inode);
745 extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
749 extern int ext3_orphan_add(handle_t *, struct inode *);
750 extern int ext3_orphan_del(handle_t *, struct inode *);
751 extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
752 __u32 start_minor_hash, __u32 *next_hash);
755 extern void ext3_error (struct super_block *, const char *, const char *, ...)
756 __attribute__ ((format (printf, 3, 4)));
757 extern void __ext3_std_error (struct super_block *, const char *, int);
758 extern void ext3_abort (struct super_block *, const char *, const char *, ...)
759 __attribute__ ((format (printf, 3, 4)));
760 extern NORET_TYPE void ext3_panic (struct super_block *, const char *,
762 __attribute__ ((NORET_AND format (printf, 3, 4)));
763 extern void ext3_warning (struct super_block *, const char *, const char *, ...)
764 __attribute__ ((format (printf, 3, 4)));
765 extern void ext3_update_dynamic_rev (struct super_block *sb);
766 extern void ext3_put_super (struct super_block *);
767 extern void ext3_write_super (struct super_block *);
768 extern void ext3_write_super_lockfs (struct super_block *);
769 extern void ext3_unlockfs (struct super_block *);
770 extern int ext3_remount (struct super_block *, int *, char *);
771 extern int ext3_statfs (struct super_block *, struct kstatfs *);
773 #define ext3_std_error(sb, errno) \
776 __ext3_std_error((sb), __FUNCTION__, (errno)); \
778 extern const char *ext3_decode_error(struct super_block *sb, int errno, char nbuf[16]);
781 * Inodes and files operations
785 extern struct file_operations ext3_dir_operations;
788 extern struct inode_operations ext3_file_inode_operations;
789 extern struct file_operations ext3_file_operations;
792 extern struct inode_operations ext3_dir_inode_operations;
793 extern struct inode_operations ext3_special_inode_operations;
796 extern struct inode_operations ext3_symlink_inode_operations;
797 extern struct inode_operations ext3_fast_symlink_inode_operations;
800 #endif /* __KERNEL__ */
802 #endif /* _LINUX_EXT3_FS_H */