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;
205 /* Used to pass group descriptor data when online resize is done */
206 struct ext3_new_group_input {
207 __u32 group; /* Group number for this data */
208 __u32 block_bitmap; /* Absolute block number of block bitmap */
209 __u32 inode_bitmap; /* Absolute block number of inode bitmap */
210 __u32 inode_table; /* Absolute block number of inode table start */
211 __u32 blocks_count; /* Total number of blocks in this group */
212 __u16 reserved_blocks; /* Number of reserved blocks in this group */
216 /* The struct ext3_new_group_input in kernel space, with free_blocks_count */
217 struct ext3_new_group_data {
223 __u16 reserved_blocks;
225 __u32 free_blocks_count;
232 #define EXT3_IOC_GETFLAGS FS_IOC_GETFLAGS
233 #define EXT3_IOC_SETFLAGS FS_IOC_SETFLAGS
234 #define EXT3_IOC_GETVERSION _IOR('f', 3, long)
235 #define EXT3_IOC_SETVERSION _IOW('f', 4, long)
236 #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
237 #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
238 #define EXT3_IOC_GETVERSION_OLD FS_IOC_GETVERSION
239 #define EXT3_IOC_SETVERSION_OLD FS_IOC_SETVERSION
240 #ifdef CONFIG_JBD_DEBUG
241 #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
243 #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
244 #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
247 * ioctl commands in 32 bit emulation
249 #define EXT3_IOC32_GETFLAGS FS_IOC32_GETFLAGS
250 #define EXT3_IOC32_SETFLAGS FS_IOC32_SETFLAGS
251 #define EXT3_IOC32_GETVERSION _IOR('f', 3, int)
252 #define EXT3_IOC32_SETVERSION _IOW('f', 4, int)
253 #define EXT3_IOC32_GETRSVSZ _IOR('f', 5, int)
254 #define EXT3_IOC32_SETRSVSZ _IOW('f', 6, int)
255 #define EXT3_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
256 #ifdef CONFIG_JBD_DEBUG
257 #define EXT3_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int)
259 #define EXT3_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
260 #define EXT3_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
266 struct ext3_mount_options {
267 unsigned long s_mount_opt;
270 unsigned long s_commit_interval;
273 char *s_qf_names[MAXQUOTAS];
278 * Structure of an inode on the disk
281 __le16 i_mode; /* File mode */
282 __le16 i_uid; /* Low 16 bits of Owner Uid */
283 __le32 i_size; /* Size in bytes */
284 __le32 i_atime; /* Access time */
285 __le32 i_ctime; /* Creation time */
286 __le32 i_mtime; /* Modification time */
287 __le32 i_dtime; /* Deletion Time */
288 __le16 i_gid; /* Low 16 bits of Group Id */
289 __le16 i_links_count; /* Links count */
290 __le32 i_blocks; /* Blocks count */
291 __le32 i_flags; /* File flags */
297 __u32 h_i_translator;
302 } osd1; /* OS dependent 1 */
303 __le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
304 __le32 i_generation; /* File version (for NFS) */
305 __le32 i_file_acl; /* File ACL */
306 __le32 i_dir_acl; /* Directory ACL */
307 __le32 i_faddr; /* Fragment address */
310 __u8 l_i_frag; /* Fragment number */
311 __u8 l_i_fsize; /* Fragment size */
313 __le16 l_i_uid_high; /* these 2 fields */
314 __le16 l_i_gid_high; /* were reserved2[0] */
318 __u8 h_i_frag; /* Fragment number */
319 __u8 h_i_fsize; /* Fragment size */
326 __u8 m_i_frag; /* Fragment number */
327 __u8 m_i_fsize; /* Fragment size */
329 __u32 m_i_reserved2[2];
331 } osd2; /* OS dependent 2 */
332 __le16 i_extra_isize;
336 #define i_size_high i_dir_acl
338 #if defined(__KERNEL__) || defined(__linux__)
339 #define i_reserved1 osd1.linux1.l_i_reserved1
340 #define i_frag osd2.linux2.l_i_frag
341 #define i_fsize osd2.linux2.l_i_fsize
342 #define i_uid_low i_uid
343 #define i_gid_low i_gid
344 #define i_uid_high osd2.linux2.l_i_uid_high
345 #define i_gid_high osd2.linux2.l_i_gid_high
346 #define i_reserved2 osd2.linux2.l_i_reserved2
348 #elif defined(__GNU__)
350 #define i_translator osd1.hurd1.h_i_translator
351 #define i_frag osd2.hurd2.h_i_frag;
352 #define i_fsize osd2.hurd2.h_i_fsize;
353 #define i_uid_high osd2.hurd2.h_i_uid_high
354 #define i_gid_high osd2.hurd2.h_i_gid_high
355 #define i_author osd2.hurd2.h_i_author
357 #elif defined(__masix__)
359 #define i_reserved1 osd1.masix1.m_i_reserved1
360 #define i_frag osd2.masix2.m_i_frag
361 #define i_fsize osd2.masix2.m_i_fsize
362 #define i_reserved2 osd2.masix2.m_i_reserved2
364 #endif /* defined(__KERNEL__) || defined(__linux__) */
369 #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
370 #define EXT3_ERROR_FS 0x0002 /* Errors detected */
371 #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
374 * Misc. filesystem flags
376 #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */
377 #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */
378 #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */
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 */
409 #define EXT3_MOUNT_NFS4ACL 0x800000 /* NFS version 4 ACLs */
411 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
412 #ifndef _LINUX_EXT2_FS_H
413 #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
414 #define set_opt(o, opt) o |= EXT3_MOUNT_##opt
415 #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
418 #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
419 #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
420 #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
423 #define ext3_set_bit ext2_set_bit
424 #define ext3_set_bit_atomic ext2_set_bit_atomic
425 #define ext3_clear_bit ext2_clear_bit
426 #define ext3_clear_bit_atomic ext2_clear_bit_atomic
427 #define ext3_test_bit ext2_test_bit
428 #define ext3_find_first_zero_bit ext2_find_first_zero_bit
429 #define ext3_find_next_zero_bit ext2_find_next_zero_bit
432 * Maximal mount counts between two filesystem checks
434 #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
435 #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
438 * Behaviour when detecting errors
440 #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
441 #define EXT3_ERRORS_RO 2 /* Remount fs read-only */
442 #define EXT3_ERRORS_PANIC 3 /* Panic */
443 #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
446 * Structure of the super block
448 struct ext3_super_block {
449 /*00*/ __le32 s_inodes_count; /* Inodes count */
450 __le32 s_blocks_count; /* Blocks count */
451 __le32 s_r_blocks_count; /* Reserved blocks count */
452 __le32 s_free_blocks_count; /* Free blocks count */
453 /*10*/ __le32 s_free_inodes_count; /* Free inodes count */
454 __le32 s_first_data_block; /* First Data Block */
455 __le32 s_log_block_size; /* Block size */
456 __le32 s_log_frag_size; /* Fragment size */
457 /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
458 __le32 s_frags_per_group; /* # Fragments per group */
459 __le32 s_inodes_per_group; /* # Inodes per group */
460 __le32 s_mtime; /* Mount time */
461 /*30*/ __le32 s_wtime; /* Write time */
462 __le16 s_mnt_count; /* Mount count */
463 __le16 s_max_mnt_count; /* Maximal mount count */
464 __le16 s_magic; /* Magic signature */
465 __le16 s_state; /* File system state */
466 __le16 s_errors; /* Behaviour when detecting errors */
467 __le16 s_minor_rev_level; /* minor revision level */
468 /*40*/ __le32 s_lastcheck; /* time of last check */
469 __le32 s_checkinterval; /* max. time between checks */
470 __le32 s_creator_os; /* OS */
471 __le32 s_rev_level; /* Revision level */
472 /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
473 __le16 s_def_resgid; /* Default gid for reserved blocks */
475 * These fields are for EXT3_DYNAMIC_REV superblocks only.
477 * Note: the difference between the compatible feature set and
478 * the incompatible feature set is that if there is a bit set
479 * in the incompatible feature set that the kernel doesn't
480 * know about, it should refuse to mount the filesystem.
482 * e2fsck's requirements are more strict; if it doesn't know
483 * about a feature in either the compatible or incompatible
484 * feature set, it must abort and not try to meddle with
485 * things it doesn't understand...
487 __le32 s_first_ino; /* First non-reserved inode */
488 __le16 s_inode_size; /* size of inode structure */
489 __le16 s_block_group_nr; /* block group # of this superblock */
490 __le32 s_feature_compat; /* compatible feature set */
491 /*60*/ __le32 s_feature_incompat; /* incompatible feature set */
492 __le32 s_feature_ro_compat; /* readonly-compatible feature set */
493 /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
494 /*78*/ char s_volume_name[16]; /* volume name */
495 /*88*/ char s_last_mounted[64]; /* directory where last mounted */
496 /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
498 * Performance hints. Directory preallocation should only
499 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
501 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
502 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
503 __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */
505 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
507 /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
508 /*E0*/ __le32 s_journal_inum; /* inode number of journal file */
509 __le32 s_journal_dev; /* device number of journal file */
510 __le32 s_last_orphan; /* start of list of inodes to delete */
511 __le32 s_hash_seed[4]; /* HTREE hash seed */
512 __u8 s_def_hash_version; /* Default hash version to use */
513 __u8 s_reserved_char_pad;
514 __u16 s_reserved_word_pad;
515 __le32 s_default_mount_opts;
516 __le32 s_first_meta_bg; /* First metablock block group */
517 __le32 s_mkfs_time; /* When the filesystem was created */
518 __le32 s_jnl_blocks[17]; /* Backup of the journal inode */
519 /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
520 /*150*/ __le32 s_blocks_count_hi; /* Blocks count */
521 __le32 s_r_blocks_count_hi; /* Reserved blocks count */
522 __le32 s_free_blocks_count_hi; /* Free blocks count */
523 __le16 s_min_extra_isize; /* All inodes have at least # bytes */
524 __le16 s_want_extra_isize; /* New inodes should reserve # bytes */
525 __le32 s_flags; /* Miscellaneous flags */
526 __le16 s_raid_stride; /* RAID stride */
527 __le16 s_mmp_interval; /* # seconds to wait in MMP checking */
528 __le64 s_mmp_block; /* Block for multi-mount protection */
529 __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
530 __u8 s_log_groups_per_flex; /* FLEX_BG group size */
531 __u8 s_reserved_char_pad2;
532 __le16 s_reserved_pad;
533 __u32 s_reserved[162]; /* Padding to the end of the block */
537 #include <linux/ext3_fs_i.h>
538 #include <linux/ext3_fs_sb.h>
539 static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
541 return sb->s_fs_info;
543 static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
545 return container_of(inode, struct ext3_inode_info, vfs_inode);
548 static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
550 return ino == EXT3_ROOT_INO ||
551 ino == EXT3_JOURNAL_INO ||
552 ino == EXT3_RESIZE_INO ||
553 (ino >= EXT3_FIRST_INO(sb) &&
554 ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
558 * Inode dynamic state flags
561 EXT3_STATE_JDATA, /* journaled data exists */
562 EXT3_STATE_NEW, /* inode is newly created */
563 EXT3_STATE_XATTR, /* has in-inode xattrs */
564 EXT3_STATE_FLUSH_ON_CLOSE, /* flush dirty pages on close */
567 static inline int ext3_test_inode_state(struct inode *inode, int bit)
569 return test_bit(bit, &EXT3_I(inode)->i_state_flags);
572 static inline void ext3_set_inode_state(struct inode *inode, int bit)
574 set_bit(bit, &EXT3_I(inode)->i_state_flags);
577 static inline void ext3_clear_inode_state(struct inode *inode, int bit)
579 clear_bit(bit, &EXT3_I(inode)->i_state_flags);
582 /* Assume that user mode programs are passing in an ext3fs superblock, not
583 * a kernel struct super_block. This will allow us to call the feature-test
584 * macros from user land. */
585 #define EXT3_SB(sb) (sb)
588 #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
591 * Codes for operating systems
593 #define EXT3_OS_LINUX 0
594 #define EXT3_OS_HURD 1
595 #define EXT3_OS_MASIX 2
596 #define EXT3_OS_FREEBSD 3
597 #define EXT3_OS_LITES 4
602 #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
603 #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
605 #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
606 #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
608 #define EXT3_GOOD_OLD_INODE_SIZE 128
611 * Feature set definitions
614 #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
615 ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
616 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
617 ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
618 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
619 ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
620 #define EXT3_SET_COMPAT_FEATURE(sb,mask) \
621 EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
622 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
623 EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
624 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
625 EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
626 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
627 EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
628 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
629 EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
630 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
631 EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
633 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
634 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
635 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
636 #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
637 #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
638 #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
640 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
641 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
642 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
644 #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
645 #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
646 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
647 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
648 #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
650 #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
651 #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
652 EXT3_FEATURE_INCOMPAT_RECOVER| \
653 EXT3_FEATURE_INCOMPAT_META_BG)
654 #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
655 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
656 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
659 * Default values for user and/or group using reserved blocks
661 #define EXT3_DEF_RESUID 0
662 #define EXT3_DEF_RESGID 0
665 * Default mount options
667 #define EXT3_DEFM_DEBUG 0x0001
668 #define EXT3_DEFM_BSDGROUPS 0x0002
669 #define EXT3_DEFM_XATTR_USER 0x0004
670 #define EXT3_DEFM_ACL 0x0008
671 #define EXT3_DEFM_UID16 0x0010
672 #define EXT3_DEFM_JMODE 0x0060
673 #define EXT3_DEFM_JMODE_DATA 0x0020
674 #define EXT3_DEFM_JMODE_ORDERED 0x0040
675 #define EXT3_DEFM_JMODE_WBACK 0x0060
678 * Structure of a directory entry
680 #define EXT3_NAME_LEN 255
682 struct ext3_dir_entry {
683 __le32 inode; /* Inode number */
684 __le16 rec_len; /* Directory entry length */
685 __le16 name_len; /* Name length */
686 char name[EXT3_NAME_LEN]; /* File name */
690 * The new version of the directory entry. Since EXT3 structures are
691 * stored in intel byte order, and the name_len field could never be
692 * bigger than 255 chars, it's safe to reclaim the extra byte for the
695 struct ext3_dir_entry_2 {
696 __le32 inode; /* Inode number */
697 __le16 rec_len; /* Directory entry length */
698 __u8 name_len; /* Name length */
700 char name[EXT3_NAME_LEN]; /* File name */
704 * Ext3 directory file types. Only the low 3 bits are used. The
705 * other bits are reserved for now.
707 #define EXT3_FT_UNKNOWN 0
708 #define EXT3_FT_REG_FILE 1
709 #define EXT3_FT_DIR 2
710 #define EXT3_FT_CHRDEV 3
711 #define EXT3_FT_BLKDEV 4
712 #define EXT3_FT_FIFO 5
713 #define EXT3_FT_SOCK 6
714 #define EXT3_FT_SYMLINK 7
716 #define EXT3_FT_MAX 8
719 * EXT3_DIR_PAD defines the directory entries boundaries
721 * NOTE: It must be a multiple of 4
723 #define EXT3_DIR_PAD 4
724 #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
725 #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
727 #define EXT3_MAX_REC_LEN ((1<<16)-1)
729 static inline unsigned ext3_rec_len_from_disk(__le16 dlen)
731 unsigned len = le16_to_cpu(dlen);
733 if (len == EXT3_MAX_REC_LEN)
738 static inline __le16 ext3_rec_len_to_disk(unsigned len)
740 if (len == (1 << 16))
741 return cpu_to_le16(EXT3_MAX_REC_LEN);
742 else if (len > (1 << 16))
744 return cpu_to_le16(len);
748 * Hash Tree Directory indexing
749 * (c) Daniel Phillips, 2001
752 #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
753 EXT3_FEATURE_COMPAT_DIR_INDEX) && \
754 (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
755 #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
756 #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
758 /* Legal values for the dx_root hash_version field: */
760 #define DX_HASH_LEGACY 0
761 #define DX_HASH_HALF_MD4 1
762 #define DX_HASH_TEA 2
763 #define DX_HASH_LEGACY_UNSIGNED 3
764 #define DX_HASH_HALF_MD4_UNSIGNED 4
765 #define DX_HASH_TEA_UNSIGNED 5
769 /* hash info structure used by the directory hash */
778 #define EXT3_HTREE_EOF 0x7fffffff
781 * Control parameters used by ext3_htree_next_block
783 #define HASH_NB_ALWAYS 1
787 * Describe an inode's exact location on disk and in memory
791 struct buffer_head *bh;
792 unsigned long offset;
793 unsigned long block_group;
796 static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
798 return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
802 * This structure is stuffed into the struct file's private_data field
803 * for directories. It is where we put information so that we can do
804 * readdir operations in hash tree order.
806 struct dir_private_info {
808 struct rb_node *curr_node;
809 struct fname *extra_fname;
812 __u32 curr_minor_hash;
816 /* calculate the first block number of the group */
817 static inline ext3_fsblk_t
818 ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
820 return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
821 le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
825 * Special error return code only used by dx_probe() and its callers.
827 #define ERR_BAD_DX_DIR -75000
830 * Function prototypes
834 * Ok, these declarations are also in <linux/kernel.h> but none of the
835 * ext3 source programs needs to include it so they are duplicated here.
837 # define NORET_TYPE /**/
838 # define ATTRIB_NORET __attribute__((noreturn))
839 # define NORET_AND noreturn,
842 extern int ext3_bg_has_super(struct super_block *sb, int group);
843 extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
844 extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
845 ext3_fsblk_t goal, int *errp);
846 extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
847 ext3_fsblk_t goal, unsigned long *count, int *errp);
848 extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
849 ext3_fsblk_t block, unsigned long count);
850 extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
851 ext3_fsblk_t block, unsigned long count,
852 unsigned long *pdquot_freed_blocks);
853 extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
854 extern void ext3_check_blocks_bitmap (struct super_block *);
855 extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
856 unsigned int block_group,
857 struct buffer_head ** bh);
858 extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
859 extern void ext3_init_block_alloc_info(struct inode *);
860 extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
863 extern int ext3_check_dir_entry(const char *, struct inode *,
864 struct ext3_dir_entry_2 *,
865 struct buffer_head *, unsigned long);
866 extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
868 struct ext3_dir_entry_2 *dirent);
869 extern void ext3_htree_free_dir_info(struct dir_private_info *p);
872 extern int ext3_sync_file(struct file *, int);
875 extern int ext3fs_dirhash(const char *name, int len, struct
876 dx_hash_info *hinfo);
879 extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
880 extern void ext3_free_inode (handle_t *, struct inode *);
881 extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
882 extern unsigned long ext3_count_free_inodes (struct super_block *);
883 extern unsigned long ext3_count_dirs (struct super_block *);
884 extern void ext3_check_inodes_bitmap (struct super_block *);
885 extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
889 int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
890 struct buffer_head *bh, ext3_fsblk_t blocknr);
891 struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
892 struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
893 int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
894 sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
897 extern struct inode *ext3_iget(struct super_block *, unsigned long);
898 extern int ext3_write_inode (struct inode *, struct writeback_control *);
899 extern int ext3_setattr (struct dentry *, struct iattr *);
900 extern void ext3_delete_inode (struct inode *);
901 extern int ext3_sync_inode (handle_t *, struct inode *);
902 extern void ext3_discard_reservation (struct inode *);
903 extern void ext3_dirty_inode(struct inode *);
904 extern int ext3_change_inode_journal_flag(struct inode *, int);
905 extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
906 extern int ext3_can_truncate(struct inode *inode);
907 extern void ext3_truncate (struct inode *);
908 extern void ext3_set_inode_flags(struct inode *);
909 extern void ext3_get_inode_flags(struct ext3_inode_info *);
910 extern void ext3_set_aops(struct inode *inode);
911 extern int ext3_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
915 extern long ext3_ioctl(struct file *, unsigned int, unsigned long);
916 extern long ext3_compat_ioctl(struct file *, unsigned int, unsigned long);
919 extern int ext3_orphan_add(handle_t *, struct inode *);
920 extern int ext3_orphan_del(handle_t *, struct inode *);
921 extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
922 __u32 start_minor_hash, __u32 *next_hash);
925 extern int ext3_group_add(struct super_block *sb,
926 struct ext3_new_group_data *input);
927 extern int ext3_group_extend(struct super_block *sb,
928 struct ext3_super_block *es,
929 ext3_fsblk_t n_blocks_count);
932 extern void ext3_error (struct super_block *, const char *, const char *, ...)
933 __attribute__ ((format (printf, 3, 4)));
934 extern void __ext3_std_error (struct super_block *, const char *, int);
935 extern void ext3_abort (struct super_block *, const char *, const char *, ...)
936 __attribute__ ((format (printf, 3, 4)));
937 extern void ext3_warning (struct super_block *, const char *, const char *, ...)
938 __attribute__ ((format (printf, 3, 4)));
939 extern void ext3_msg(struct super_block *, const char *, const char *, ...)
940 __attribute__ ((format (printf, 3, 4)));
941 extern void ext3_update_dynamic_rev (struct super_block *sb);
943 #define ext3_std_error(sb, errno) \
946 __ext3_std_error((sb), __func__, (errno)); \
950 * Inodes and files operations
954 extern const struct file_operations ext3_dir_operations;
957 extern const struct inode_operations ext3_file_inode_operations;
958 extern const struct file_operations ext3_file_operations;
961 extern const struct inode_operations ext3_dir_inode_operations;
962 extern const struct inode_operations ext3_special_inode_operations;
965 extern const struct inode_operations ext3_symlink_inode_operations;
966 extern const struct inode_operations ext3_fast_symlink_inode_operations;
969 #endif /* __KERNEL__ */
971 #endif /* _LINUX_EXT3_FS_H */