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/magic.h>
23 * The second extended filesystem constants/structures
27 * Define EXT3FS_DEBUG to produce debug messages
32 * Define EXT3_RESERVATION to reserve data blocks for expanding files
34 #define EXT3_DEFAULT_RESERVE_BLOCKS 8
35 /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
36 #define EXT3_MAX_RESERVE_BLOCKS 1027
37 #define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
43 #define ext3_debug(f, a...) \
45 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
46 __FILE__, __LINE__, __func__); \
47 printk (KERN_DEBUG f, ## a); \
50 #define ext3_debug(f, a...) do {} while (0)
54 * Special inodes numbers
56 #define EXT3_BAD_INO 1 /* Bad blocks inode */
57 #define EXT3_ROOT_INO 2 /* Root inode */
58 #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
59 #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
60 #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
61 #define EXT3_JOURNAL_INO 8 /* Journal inode */
63 /* First non-reserved inode for old ext3 filesystems */
64 #define EXT3_GOOD_OLD_FIRST_INO 11
67 * Maximal count of links to a file
69 #define EXT3_LINK_MAX 32000
72 * Macro-instructions used to manage several block sizes
74 #define EXT3_MIN_BLOCK_SIZE 1024
75 #define EXT3_MAX_BLOCK_SIZE 65536
76 #define EXT3_MIN_BLOCK_LOG_SIZE 10
78 # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
80 # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
82 #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
84 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
86 # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
89 #define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
90 #define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
91 #define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
93 #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
94 EXT3_GOOD_OLD_INODE_SIZE : \
96 #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
97 EXT3_GOOD_OLD_FIRST_INO : \
102 * Macro-instructions used to manage fragments
104 #define EXT3_MIN_FRAG_SIZE 1024
105 #define EXT3_MAX_FRAG_SIZE 4096
106 #define EXT3_MIN_FRAG_LOG_SIZE 10
108 # define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
109 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
111 # define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
112 # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
116 * Structure of a blocks group descriptor
118 struct ext3_group_desc
120 __le32 bg_block_bitmap; /* Blocks bitmap block */
121 __le32 bg_inode_bitmap; /* Inodes bitmap block */
122 __le32 bg_inode_table; /* Inodes table block */
123 __le16 bg_free_blocks_count; /* Free blocks count */
124 __le16 bg_free_inodes_count; /* Free inodes count */
125 __le16 bg_used_dirs_count; /* Directories count */
127 __le32 bg_reserved[3];
131 * Macro-instructions used to manage group descriptors
134 # define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
135 # define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
136 # define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
137 # define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
139 # define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
140 # define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
141 # define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
145 * Constants relative to the data blocks
147 #define EXT3_NDIR_BLOCKS 12
148 #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
149 #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
150 #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
151 #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
156 #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
157 #define EXT3_UNRM_FL 0x00000002 /* Undelete */
158 #define EXT3_COMPR_FL 0x00000004 /* Compress file */
159 #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
160 #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
161 #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
162 #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
163 #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
164 /* Reserved for compression usage... */
165 #define EXT3_DIRTY_FL 0x00000100
166 #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
167 #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
168 #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
169 /* End compression flags --- maybe not all used */
170 #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
171 #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
172 #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
173 #define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
174 #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
175 #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
176 #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
178 #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
179 #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
181 /* Flags that should be inherited by new inodes from their parent. */
182 #define EXT3_FL_INHERITED (EXT3_SECRM_FL | EXT3_UNRM_FL | EXT3_COMPR_FL |\
183 EXT3_SYNC_FL | EXT3_IMMUTABLE_FL | EXT3_APPEND_FL |\
184 EXT3_NODUMP_FL | EXT3_NOATIME_FL | EXT3_COMPRBLK_FL|\
185 EXT3_NOCOMPR_FL | EXT3_JOURNAL_DATA_FL |\
186 EXT3_NOTAIL_FL | EXT3_DIRSYNC_FL)
188 /* Flags that are appropriate for regular files (all but dir-specific ones). */
189 #define EXT3_REG_FLMASK (~(EXT3_DIRSYNC_FL | EXT3_TOPDIR_FL))
191 /* Flags that are appropriate for non-directories/regular files. */
192 #define EXT3_OTHER_FLMASK (EXT3_NODUMP_FL | EXT3_NOATIME_FL)
194 /* Mask out flags that are inappropriate for the given type of inode. */
195 static inline __u32 ext3_mask_flags(umode_t mode, __u32 flags)
199 else if (S_ISREG(mode))
200 return flags & EXT3_REG_FLMASK;
202 return flags & EXT3_OTHER_FLMASK;
206 * Inode dynamic state flags
208 #define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
209 #define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
210 #define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */
212 /* Used to pass group descriptor data when online resize is done */
213 struct ext3_new_group_input {
214 __u32 group; /* Group number for this data */
215 __u32 block_bitmap; /* Absolute block number of block bitmap */
216 __u32 inode_bitmap; /* Absolute block number of inode bitmap */
217 __u32 inode_table; /* Absolute block number of inode table start */
218 __u32 blocks_count; /* Total number of blocks in this group */
219 __u16 reserved_blocks; /* Number of reserved blocks in this group */
223 /* The struct ext3_new_group_input in kernel space, with free_blocks_count */
224 struct ext3_new_group_data {
230 __u16 reserved_blocks;
232 __u32 free_blocks_count;
239 #define EXT3_IOC_GETFLAGS FS_IOC_GETFLAGS
240 #define EXT3_IOC_SETFLAGS FS_IOC_SETFLAGS
241 #define EXT3_IOC_GETVERSION _IOR('f', 3, long)
242 #define EXT3_IOC_SETVERSION _IOW('f', 4, long)
243 #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
244 #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
245 #define EXT3_IOC_GETVERSION_OLD FS_IOC_GETVERSION
246 #define EXT3_IOC_SETVERSION_OLD FS_IOC_SETVERSION
247 #ifdef CONFIG_JBD_DEBUG
248 #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
250 #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
251 #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
254 * ioctl commands in 32 bit emulation
256 #define EXT3_IOC32_GETFLAGS FS_IOC32_GETFLAGS
257 #define EXT3_IOC32_SETFLAGS FS_IOC32_SETFLAGS
258 #define EXT3_IOC32_GETVERSION _IOR('f', 3, int)
259 #define EXT3_IOC32_SETVERSION _IOW('f', 4, int)
260 #define EXT3_IOC32_GETRSVSZ _IOR('f', 5, int)
261 #define EXT3_IOC32_SETRSVSZ _IOW('f', 6, int)
262 #define EXT3_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
263 #ifdef CONFIG_JBD_DEBUG
264 #define EXT3_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int)
266 #define EXT3_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
267 #define EXT3_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
273 struct ext3_mount_options {
274 unsigned long s_mount_opt;
277 unsigned long s_commit_interval;
280 char *s_qf_names[MAXQUOTAS];
285 * Structure of an inode on the disk
288 __le16 i_mode; /* File mode */
289 __le16 i_uid; /* Low 16 bits of Owner Uid */
290 __le32 i_size; /* Size in bytes */
291 __le32 i_atime; /* Access time */
292 __le32 i_ctime; /* Creation time */
293 __le32 i_mtime; /* Modification time */
294 __le32 i_dtime; /* Deletion Time */
295 __le16 i_gid; /* Low 16 bits of Group Id */
296 __le16 i_links_count; /* Links count */
297 __le32 i_blocks; /* Blocks count */
298 __le32 i_flags; /* File flags */
304 __u32 h_i_translator;
309 } osd1; /* OS dependent 1 */
310 __le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
311 __le32 i_generation; /* File version (for NFS) */
312 __le32 i_file_acl; /* File ACL */
313 __le32 i_dir_acl; /* Directory ACL */
314 __le32 i_faddr; /* Fragment address */
317 __u8 l_i_frag; /* Fragment number */
318 __u8 l_i_fsize; /* Fragment size */
320 __le16 l_i_uid_high; /* these 2 fields */
321 __le16 l_i_gid_high; /* were reserved2[0] */
325 __u8 h_i_frag; /* Fragment number */
326 __u8 h_i_fsize; /* Fragment size */
333 __u8 m_i_frag; /* Fragment number */
334 __u8 m_i_fsize; /* Fragment size */
336 __u32 m_i_reserved2[2];
338 } osd2; /* OS dependent 2 */
339 __le16 i_extra_isize;
343 #define i_size_high i_dir_acl
345 #if defined(__KERNEL__) || defined(__linux__)
346 #define i_reserved1 osd1.linux1.l_i_reserved1
347 #define i_frag osd2.linux2.l_i_frag
348 #define i_fsize osd2.linux2.l_i_fsize
349 #define i_uid_low i_uid
350 #define i_gid_low i_gid
351 #define i_uid_high osd2.linux2.l_i_uid_high
352 #define i_gid_high osd2.linux2.l_i_gid_high
353 #define i_reserved2 osd2.linux2.l_i_reserved2
355 #elif defined(__GNU__)
357 #define i_translator osd1.hurd1.h_i_translator
358 #define i_frag osd2.hurd2.h_i_frag;
359 #define i_fsize osd2.hurd2.h_i_fsize;
360 #define i_uid_high osd2.hurd2.h_i_uid_high
361 #define i_gid_high osd2.hurd2.h_i_gid_high
362 #define i_author osd2.hurd2.h_i_author
364 #elif defined(__masix__)
366 #define i_reserved1 osd1.masix1.m_i_reserved1
367 #define i_frag osd2.masix2.m_i_frag
368 #define i_fsize osd2.masix2.m_i_fsize
369 #define i_reserved2 osd2.masix2.m_i_reserved2
371 #endif /* defined(__KERNEL__) || defined(__linux__) */
376 #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
377 #define EXT3_ERROR_FS 0x0002 /* Errors detected */
378 #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
383 #define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */
384 #define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
385 #define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */
386 #define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */
387 #define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
388 #define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
389 #define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
390 #define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
391 #define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
392 #define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */
393 #define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
394 #define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
395 #define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
396 #define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
397 #define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
398 #define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
399 #define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
400 #define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
401 #define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
402 #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
403 #define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */
404 #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
405 #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
406 #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
407 #define EXT3_MOUNT_DATA_ERR_ABORT 0x400000 /* Abort on file data write
408 * error in ordered mode */
410 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
411 #ifndef _LINUX_EXT2_FS_H
412 #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
413 #define set_opt(o, opt) o |= EXT3_MOUNT_##opt
414 #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
417 #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
418 #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
419 #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
422 #define ext3_set_bit ext2_set_bit
423 #define ext3_set_bit_atomic ext2_set_bit_atomic
424 #define ext3_clear_bit ext2_clear_bit
425 #define ext3_clear_bit_atomic ext2_clear_bit_atomic
426 #define ext3_test_bit ext2_test_bit
427 #define ext3_find_first_zero_bit ext2_find_first_zero_bit
428 #define ext3_find_next_zero_bit ext2_find_next_zero_bit
431 * Maximal mount counts between two filesystem checks
433 #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
434 #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
437 * Behaviour when detecting errors
439 #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
440 #define EXT3_ERRORS_RO 2 /* Remount fs read-only */
441 #define EXT3_ERRORS_PANIC 3 /* Panic */
442 #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
445 * Structure of the super block
447 struct ext3_super_block {
448 /*00*/ __le32 s_inodes_count; /* Inodes count */
449 __le32 s_blocks_count; /* Blocks count */
450 __le32 s_r_blocks_count; /* Reserved blocks count */
451 __le32 s_free_blocks_count; /* Free blocks count */
452 /*10*/ __le32 s_free_inodes_count; /* Free inodes count */
453 __le32 s_first_data_block; /* First Data Block */
454 __le32 s_log_block_size; /* Block size */
455 __le32 s_log_frag_size; /* Fragment size */
456 /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
457 __le32 s_frags_per_group; /* # Fragments per group */
458 __le32 s_inodes_per_group; /* # Inodes per group */
459 __le32 s_mtime; /* Mount time */
460 /*30*/ __le32 s_wtime; /* Write time */
461 __le16 s_mnt_count; /* Mount count */
462 __le16 s_max_mnt_count; /* Maximal mount count */
463 __le16 s_magic; /* Magic signature */
464 __le16 s_state; /* File system state */
465 __le16 s_errors; /* Behaviour when detecting errors */
466 __le16 s_minor_rev_level; /* minor revision level */
467 /*40*/ __le32 s_lastcheck; /* time of last check */
468 __le32 s_checkinterval; /* max. time between checks */
469 __le32 s_creator_os; /* OS */
470 __le32 s_rev_level; /* Revision level */
471 /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
472 __le16 s_def_resgid; /* Default gid for reserved blocks */
474 * These fields are for EXT3_DYNAMIC_REV superblocks only.
476 * Note: the difference between the compatible feature set and
477 * the incompatible feature set is that if there is a bit set
478 * in the incompatible feature set that the kernel doesn't
479 * know about, it should refuse to mount the filesystem.
481 * e2fsck's requirements are more strict; if it doesn't know
482 * about a feature in either the compatible or incompatible
483 * feature set, it must abort and not try to meddle with
484 * things it doesn't understand...
486 __le32 s_first_ino; /* First non-reserved inode */
487 __le16 s_inode_size; /* size of inode structure */
488 __le16 s_block_group_nr; /* block group # of this superblock */
489 __le32 s_feature_compat; /* compatible feature set */
490 /*60*/ __le32 s_feature_incompat; /* incompatible feature set */
491 __le32 s_feature_ro_compat; /* readonly-compatible feature set */
492 /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
493 /*78*/ char s_volume_name[16]; /* volume name */
494 /*88*/ char s_last_mounted[64]; /* directory where last mounted */
495 /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
497 * Performance hints. Directory preallocation should only
498 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
500 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
501 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
502 __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */
504 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
506 /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
507 /*E0*/ __le32 s_journal_inum; /* inode number of journal file */
508 __le32 s_journal_dev; /* device number of journal file */
509 __le32 s_last_orphan; /* start of list of inodes to delete */
510 __le32 s_hash_seed[4]; /* HTREE hash seed */
511 __u8 s_def_hash_version; /* Default hash version to use */
512 __u8 s_reserved_char_pad;
513 __u16 s_reserved_word_pad;
514 __le32 s_default_mount_opts;
515 __le32 s_first_meta_bg; /* First metablock block group */
516 __u32 s_reserved[190]; /* Padding to the end of the block */
520 #include <linux/ext3_fs_i.h>
521 #include <linux/ext3_fs_sb.h>
522 static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
524 return sb->s_fs_info;
526 static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
528 return container_of(inode, struct ext3_inode_info, vfs_inode);
531 static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
533 return ino == EXT3_ROOT_INO ||
534 ino == EXT3_JOURNAL_INO ||
535 ino == EXT3_RESIZE_INO ||
536 (ino >= EXT3_FIRST_INO(sb) &&
537 ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
540 /* Assume that user mode programs are passing in an ext3fs superblock, not
541 * a kernel struct super_block. This will allow us to call the feature-test
542 * macros from user land. */
543 #define EXT3_SB(sb) (sb)
546 #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
549 * Codes for operating systems
551 #define EXT3_OS_LINUX 0
552 #define EXT3_OS_HURD 1
553 #define EXT3_OS_MASIX 2
554 #define EXT3_OS_FREEBSD 3
555 #define EXT3_OS_LITES 4
560 #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
561 #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
563 #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
564 #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
566 #define EXT3_GOOD_OLD_INODE_SIZE 128
569 * Feature set definitions
572 #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
573 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
574 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
575 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
576 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
577 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
578 #define EXT3_SET_COMPAT_FEATURE(sb,mask) \
579 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
580 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
581 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
582 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
583 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
584 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
585 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
586 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
587 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
588 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
589 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
591 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
592 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
593 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
594 #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
595 #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
596 #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
598 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
599 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
600 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
602 #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
603 #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
604 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
605 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
606 #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
608 #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
609 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
610 EXT3_FEATURE_INCOMPAT_RECOVER| \
611 EXT3_FEATURE_INCOMPAT_META_BG)
612 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
613 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
614 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
617 * Default values for user and/or group using reserved blocks
619 #define EXT3_DEF_RESUID 0
620 #define EXT3_DEF_RESGID 0
623 * Default mount options
625 #define EXT3_DEFM_DEBUG 0x0001
626 #define EXT3_DEFM_BSDGROUPS 0x0002
627 #define EXT3_DEFM_XATTR_USER 0x0004
628 #define EXT3_DEFM_ACL 0x0008
629 #define EXT3_DEFM_UID16 0x0010
630 #define EXT3_DEFM_JMODE 0x0060
631 #define EXT3_DEFM_JMODE_DATA 0x0020
632 #define EXT3_DEFM_JMODE_ORDERED 0x0040
633 #define EXT3_DEFM_JMODE_WBACK 0x0060
636 * Structure of a directory entry
638 #define EXT3_NAME_LEN 255
640 struct ext3_dir_entry {
641 __le32 inode; /* Inode number */
642 __le16 rec_len; /* Directory entry length */
643 __le16 name_len; /* Name length */
644 char name[EXT3_NAME_LEN]; /* File name */
648 * The new version of the directory entry. Since EXT3 structures are
649 * stored in intel byte order, and the name_len field could never be
650 * bigger than 255 chars, it's safe to reclaim the extra byte for the
653 struct ext3_dir_entry_2 {
654 __le32 inode; /* Inode number */
655 __le16 rec_len; /* Directory entry length */
656 __u8 name_len; /* Name length */
658 char name[EXT3_NAME_LEN]; /* File name */
662 * Ext3 directory file types. Only the low 3 bits are used. The
663 * other bits are reserved for now.
665 #define EXT3_FT_UNKNOWN 0
666 #define EXT3_FT_REG_FILE 1
667 #define EXT3_FT_DIR 2
668 #define EXT3_FT_CHRDEV 3
669 #define EXT3_FT_BLKDEV 4
670 #define EXT3_FT_FIFO 5
671 #define EXT3_FT_SOCK 6
672 #define EXT3_FT_SYMLINK 7
674 #define EXT3_FT_MAX 8
677 * EXT3_DIR_PAD defines the directory entries boundaries
679 * NOTE: It must be a multiple of 4
681 #define EXT3_DIR_PAD 4
682 #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
683 #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
685 #define EXT3_MAX_REC_LEN ((1<<16)-1)
687 static inline unsigned ext3_rec_len_from_disk(__le16 dlen)
689 unsigned len = le16_to_cpu(dlen);
691 if (len == EXT3_MAX_REC_LEN)
696 static inline __le16 ext3_rec_len_to_disk(unsigned len)
698 if (len == (1 << 16))
699 return cpu_to_le16(EXT3_MAX_REC_LEN);
700 else if (len > (1 << 16))
702 return cpu_to_le16(len);
706 * Hash Tree Directory indexing
707 * (c) Daniel Phillips, 2001
710 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
711 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
712 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
713 #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
714 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
716 /* Legal values for the dx_root hash_version field: */
718 #define DX_HASH_LEGACY 0
719 #define DX_HASH_HALF_MD4 1
720 #define DX_HASH_TEA 2
724 /* hash info structure used by the directory hash */
733 #define EXT3_HTREE_EOF 0x7fffffff
736 * Control parameters used by ext3_htree_next_block
738 #define HASH_NB_ALWAYS 1
742 * Describe an inode's exact location on disk and in memory
746 struct buffer_head *bh;
747 unsigned long offset;
748 unsigned long block_group;
751 static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
753 return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
757 * This structure is stuffed into the struct file's private_data field
758 * for directories. It is where we put information so that we can do
759 * readdir operations in hash tree order.
761 struct dir_private_info {
763 struct rb_node *curr_node;
764 struct fname *extra_fname;
767 __u32 curr_minor_hash;
771 /* calculate the first block number of the group */
772 static inline ext3_fsblk_t
773 ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
775 return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
776 le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
780 * Special error return code only used by dx_probe() and its callers.
782 #define ERR_BAD_DX_DIR -75000
785 * Function prototypes
789 * Ok, these declarations are also in <linux/kernel.h> but none of the
790 * ext3 source programs needs to include it so they are duplicated here.
792 # define NORET_TYPE /**/
793 # define ATTRIB_NORET __attribute__((noreturn))
794 # define NORET_AND noreturn,
797 extern int ext3_bg_has_super(struct super_block *sb, int group);
798 extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
799 extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
800 ext3_fsblk_t goal, int *errp);
801 extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
802 ext3_fsblk_t goal, unsigned long *count, int *errp);
803 extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
804 ext3_fsblk_t block, unsigned long count);
805 extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
806 ext3_fsblk_t block, unsigned long count,
807 unsigned long *pdquot_freed_blocks);
808 extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
809 extern void ext3_check_blocks_bitmap (struct super_block *);
810 extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
811 unsigned int block_group,
812 struct buffer_head ** bh);
813 extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
814 extern void ext3_init_block_alloc_info(struct inode *);
815 extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
818 extern int ext3_check_dir_entry(const char *, struct inode *,
819 struct ext3_dir_entry_2 *,
820 struct buffer_head *, unsigned long);
821 extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
823 struct ext3_dir_entry_2 *dirent);
824 extern void ext3_htree_free_dir_info(struct dir_private_info *p);
827 extern int ext3_sync_file (struct file *, struct dentry *, int);
830 extern int ext3fs_dirhash(const char *name, int len, struct
831 dx_hash_info *hinfo);
834 extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
835 extern void ext3_free_inode (handle_t *, struct inode *);
836 extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
837 extern unsigned long ext3_count_free_inodes (struct super_block *);
838 extern unsigned long ext3_count_dirs (struct super_block *);
839 extern void ext3_check_inodes_bitmap (struct super_block *);
840 extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
844 int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
845 struct buffer_head *bh, ext3_fsblk_t blocknr);
846 struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
847 struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
848 int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
849 sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
850 int create, int extend_disksize);
852 extern struct inode *ext3_iget(struct super_block *, unsigned long);
853 extern int ext3_write_inode (struct inode *, int);
854 extern int ext3_setattr (struct dentry *, struct iattr *);
855 extern void ext3_delete_inode (struct inode *);
856 extern int ext3_sync_inode (handle_t *, struct inode *);
857 extern void ext3_discard_reservation (struct inode *);
858 extern void ext3_dirty_inode(struct inode *);
859 extern int ext3_change_inode_journal_flag(struct inode *, int);
860 extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
861 extern int ext3_can_truncate(struct inode *inode);
862 extern void ext3_truncate (struct inode *);
863 extern void ext3_set_inode_flags(struct inode *);
864 extern void ext3_get_inode_flags(struct ext3_inode_info *);
865 extern void ext3_set_aops(struct inode *inode);
866 extern int ext3_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
870 extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
872 extern long ext3_compat_ioctl (struct file *, unsigned int, unsigned long);
875 extern int ext3_orphan_add(handle_t *, struct inode *);
876 extern int ext3_orphan_del(handle_t *, struct inode *);
877 extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
878 __u32 start_minor_hash, __u32 *next_hash);
881 extern int ext3_group_add(struct super_block *sb,
882 struct ext3_new_group_data *input);
883 extern int ext3_group_extend(struct super_block *sb,
884 struct ext3_super_block *es,
885 ext3_fsblk_t n_blocks_count);
888 extern void ext3_error (struct super_block *, const char *, const char *, ...)
889 __attribute__ ((format (printf, 3, 4)));
890 extern void __ext3_std_error (struct super_block *, const char *, int);
891 extern void ext3_abort (struct super_block *, const char *, const char *, ...)
892 __attribute__ ((format (printf, 3, 4)));
893 extern void ext3_warning (struct super_block *, const char *, const char *, ...)
894 __attribute__ ((format (printf, 3, 4)));
895 extern void ext3_update_dynamic_rev (struct super_block *sb);
897 #define ext3_std_error(sb, errno) \
900 __ext3_std_error((sb), __func__, (errno)); \
904 * Inodes and files operations
908 extern const struct file_operations ext3_dir_operations;
911 extern const struct inode_operations ext3_file_inode_operations;
912 extern const struct file_operations ext3_file_operations;
915 extern const struct inode_operations ext3_dir_inode_operations;
916 extern const struct inode_operations ext3_special_inode_operations;
919 extern const struct inode_operations ext3_symlink_inode_operations;
920 extern const struct inode_operations ext3_fast_symlink_inode_operations;
923 #endif /* __KERNEL__ */
925 #endif /* _LINUX_EXT3_FS_H */