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/*
* linux/include/linux/ext3_fs.h
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card (card@masi.ibp.fr)
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* from
*
* linux/include/linux/minix_fs.h
*
* Copyright (C) 1991, 1992 Linus Torvalds
*/
#ifndef _LINUX_EXT3_FS_H
#define _LINUX_EXT3_FS_H
#include <linux/types.h>
#include <linux/ext3_fs_i.h>
#include <linux/ext3_fs_sb.h>
struct statfs;
/*
* The second extended filesystem constants/structures
*/
/*
* Define EXT3FS_DEBUG to produce debug messages
*/
#undef EXT3FS_DEBUG
/*
* Define EXT3_PREALLOCATE to preallocate data blocks for expanding files
*/
#undef EXT3_PREALLOCATE /* @@@ Fix this! */
#define EXT3_DEFAULT_PREALLOC_BLOCKS 8
/*
* Always enable hashed directories
*/
#define CONFIG_EXT3_INDEX
/*
* Debug code
*/
#ifdef EXT3FS_DEBUG
#define ext3_debug(f, a...) \
do { \
printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
__FILE__, __LINE__, __FUNCTION__); \
printk (KERN_DEBUG f, ## a); \
} while (0)
#else
#define ext3_debug(f, a...) do {} while (0)
#endif
/*
* Special inodes numbers
*/
#define EXT3_BAD_INO 1 /* Bad blocks inode */
#define EXT3_ROOT_INO 2 /* Root inode */
#define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
#define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
#define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
#define EXT3_JOURNAL_INO 8 /* Journal inode */
/* First non-reserved inode for old ext3 filesystems */
#define EXT3_GOOD_OLD_FIRST_INO 11
/*
* The second extended file system magic number
*/
#define EXT3_SUPER_MAGIC 0xEF53
/*
* Maximal count of links to a file
*/
#define EXT3_LINK_MAX 32000
/*
* Macro-instructions used to manage several block sizes
*/
#define EXT3_MIN_BLOCK_SIZE 1024
#define EXT3_MAX_BLOCK_SIZE 4096
#define EXT3_MIN_BLOCK_LOG_SIZE 10
#ifdef __KERNEL__
# define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
#else
# define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
#endif
#define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
#ifdef __KERNEL__
# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
#else
# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
#endif
#ifdef __KERNEL__
#define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
#define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
#define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
#else
#define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
EXT3_GOOD_OLD_INODE_SIZE : \
(s)->s_inode_size)
#define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
EXT3_GOOD_OLD_FIRST_INO : \
(s)->s_first_ino)
#endif
/*
* Macro-instructions used to manage fragments
*/
#define EXT3_MIN_FRAG_SIZE 1024
#define EXT3_MAX_FRAG_SIZE 4096
#define EXT3_MIN_FRAG_LOG_SIZE 10
#ifdef __KERNEL__
# define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
#else
# define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
#endif
/*
* Structure of a blocks group descriptor
*/
struct ext3_group_desc
{
__u32 bg_block_bitmap; /* Blocks bitmap block */
__u32 bg_inode_bitmap; /* Inodes bitmap block */
__u32 bg_inode_table; /* Inodes table block */
__u16 bg_free_blocks_count; /* Free blocks count */
__u16 bg_free_inodes_count; /* Free inodes count */
__u16 bg_used_dirs_count; /* Directories count */
__u16 bg_pad;
__u32 bg_reserved[3];
};
/*
* Macro-instructions used to manage group descriptors
*/
#ifdef __KERNEL__
# define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
# define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
# define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
# define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
#else
# define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
# define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
# define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
#endif
/*
* Constants relative to the data blocks
*/
#define EXT3_NDIR_BLOCKS 12
#define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
#define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
#define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
#define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
/*
* Inode flags
*/
#define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
#define EXT3_UNRM_FL 0x00000002 /* Undelete */
#define EXT3_COMPR_FL 0x00000004 /* Compress file */
#define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
#define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
#define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
#define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
#define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
/* Reserved for compression usage... */
#define EXT3_DIRTY_FL 0x00000100
#define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
#define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
#define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
/* End compression flags --- maybe not all used */
#define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
#define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
#define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
#define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
#define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
#define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
#define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
#define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
/*
* Inode dynamic state flags
*/
#define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
#define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
/*
* ioctl commands
*/
#define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
#define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
#define EXT3_IOC_GETVERSION _IOR('f', 3, long)
#define EXT3_IOC_SETVERSION _IOW('f', 4, long)
#define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
#define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
#ifdef CONFIG_JBD_DEBUG
#define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
#endif
/*
* Structure of an inode on the disk
*/
struct ext3_inode {
__u16 i_mode; /* File mode */
__u16 i_uid; /* Low 16 bits of Owner Uid */
__u32 i_size; /* Size in bytes */
__u32 i_atime; /* Access time */
__u32 i_ctime; /* Creation time */
__u32 i_mtime; /* Modification time */
__u32 i_dtime; /* Deletion Time */
__u16 i_gid; /* Low 16 bits of Group Id */
__u16 i_links_count; /* Links count */
__u32 i_blocks; /* Blocks count */
__u32 i_flags; /* File flags */
union {
struct {
__u32 l_i_reserved1;
} linux1;
struct {
__u32 h_i_translator;
} hurd1;
struct {
__u32 m_i_reserved1;
} masix1;
} osd1; /* OS dependent 1 */
__u32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
__u32 i_generation; /* File version (for NFS) */
__u32 i_file_acl; /* File ACL */
__u32 i_dir_acl; /* Directory ACL */
__u32 i_faddr; /* Fragment address */
union {
struct {
__u8 l_i_frag; /* Fragment number */
__u8 l_i_fsize; /* Fragment size */
__u16 i_pad1;
__u16 l_i_uid_high; /* these 2 fields */
__u16 l_i_gid_high; /* were reserved2[0] */
__u32 l_i_reserved2;
} linux2;
struct {
__u8 h_i_frag; /* Fragment number */
__u8 h_i_fsize; /* Fragment size */
__u16 h_i_mode_high;
__u16 h_i_uid_high;
__u16 h_i_gid_high;
__u32 h_i_author;
} hurd2;
struct {
__u8 m_i_frag; /* Fragment number */
__u8 m_i_fsize; /* Fragment size */
__u16 m_pad1;
__u32 m_i_reserved2[2];
} masix2;
} osd2; /* OS dependent 2 */
};
#define i_size_high i_dir_acl
#if defined(__KERNEL__) || defined(__linux__)
#define i_reserved1 osd1.linux1.l_i_reserved1
#define i_frag osd2.linux2.l_i_frag
#define i_fsize osd2.linux2.l_i_fsize
#define i_uid_low i_uid
#define i_gid_low i_gid
#define i_uid_high osd2.linux2.l_i_uid_high
#define i_gid_high osd2.linux2.l_i_gid_high
#define i_reserved2 osd2.linux2.l_i_reserved2
#elif defined(__GNU__)
#define i_translator osd1.hurd1.h_i_translator
#define i_frag osd2.hurd2.h_i_frag;
#define i_fsize osd2.hurd2.h_i_fsize;
#define i_uid_high osd2.hurd2.h_i_uid_high
#define i_gid_high osd2.hurd2.h_i_gid_high
#define i_author osd2.hurd2.h_i_author
#elif defined(__masix__)
#define i_reserved1 osd1.masix1.m_i_reserved1
#define i_frag osd2.masix2.m_i_frag
#define i_fsize osd2.masix2.m_i_fsize
#define i_reserved2 osd2.masix2.m_i_reserved2
#endif /* defined(__KERNEL__) || defined(__linux__) */
/*
* File system states
*/
#define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
#define EXT3_ERROR_FS 0x0002 /* Errors detected */
#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
/*
* Mount flags
*/
#define EXT3_MOUNT_CHECK 0x0001 /* Do mount-time checks */
#define EXT3_MOUNT_OLDALLOC 0x0002 /* Don't use the new Orlov allocator */
#define EXT3_MOUNT_GRPID 0x0004 /* Create files with directory's group */
#define EXT3_MOUNT_DEBUG 0x0008 /* Some debugging messages */
#define EXT3_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
#define EXT3_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
#define EXT3_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
#define EXT3_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
#define EXT3_MOUNT_NOLOAD 0x0100 /* Don't use existing journal*/
#define EXT3_MOUNT_ABORT 0x0200 /* Fatal error detected */
#define EXT3_MOUNT_DATA_FLAGS 0x0C00 /* Mode for data writes: */
#define EXT3_MOUNT_JOURNAL_DATA 0x0400 /* Write data to journal */
#define EXT3_MOUNT_ORDERED_DATA 0x0800 /* Flush data before commit */
#define EXT3_MOUNT_WRITEBACK_DATA 0x0C00 /* No data ordering */
#define EXT3_MOUNT_UPDATE_JOURNAL 0x1000 /* Update the journal format */
#define EXT3_MOUNT_NO_UID32 0x2000 /* Disable 32-bit UIDs */
#define EXT3_MOUNT_XATTR_USER 0x4000 /* Extended user attributes */
#define EXT3_MOUNT_POSIX_ACL 0x8000 /* POSIX Access Control Lists */
/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
#ifndef _LINUX_EXT2_FS_H
#define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
#define set_opt(o, opt) o |= EXT3_MOUNT_##opt
#define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
EXT3_MOUNT_##opt)
#else
#define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
#define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
#define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
#endif
#define ext3_set_bit ext2_set_bit
#define ext3_set_bit_atomic ext2_set_bit_atomic
#define ext3_clear_bit ext2_clear_bit
#define ext3_clear_bit_atomic ext2_clear_bit_atomic
#define ext3_test_bit ext2_test_bit
#define ext3_find_first_zero_bit ext2_find_first_zero_bit
#define ext3_find_next_zero_bit ext2_find_next_zero_bit
/*
* Maximal mount counts between two filesystem checks
*/
#define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
#define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
/*
* Behaviour when detecting errors
*/
#define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
#define EXT3_ERRORS_RO 2 /* Remount fs read-only */
#define EXT3_ERRORS_PANIC 3 /* Panic */
#define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
/*
* Structure of the super block
*/
struct ext3_super_block {
/*00*/ __u32 s_inodes_count; /* Inodes count */
__u32 s_blocks_count; /* Blocks count */
__u32 s_r_blocks_count; /* Reserved blocks count */
__u32 s_free_blocks_count; /* Free blocks count */
/*10*/ __u32 s_free_inodes_count; /* Free inodes count */
__u32 s_first_data_block; /* First Data Block */
__u32 s_log_block_size; /* Block size */
__s32 s_log_frag_size; /* Fragment size */
/*20*/ __u32 s_blocks_per_group; /* # Blocks per group */
__u32 s_frags_per_group; /* # Fragments per group */
__u32 s_inodes_per_group; /* # Inodes per group */
__u32 s_mtime; /* Mount time */
/*30*/ __u32 s_wtime; /* Write time */
__u16 s_mnt_count; /* Mount count */
__s16 s_max_mnt_count; /* Maximal mount count */
__u16 s_magic; /* Magic signature */
__u16 s_state; /* File system state */
__u16 s_errors; /* Behaviour when detecting errors */
__u16 s_minor_rev_level; /* minor revision level */
/*40*/ __u32 s_lastcheck; /* time of last check */
__u32 s_checkinterval; /* max. time between checks */
__u32 s_creator_os; /* OS */
__u32 s_rev_level; /* Revision level */
/*50*/ __u16 s_def_resuid; /* Default uid for reserved blocks */
__u16 s_def_resgid; /* Default gid for reserved blocks */
/*
* These fields are for EXT3_DYNAMIC_REV superblocks only.
*
* Note: the difference between the compatible feature set and
* the incompatible feature set is that if there is a bit set
* in the incompatible feature set that the kernel doesn't
* know about, it should refuse to mount the filesystem.
*
* e2fsck's requirements are more strict; if it doesn't know
* about a feature in either the compatible or incompatible
* feature set, it must abort and not try to meddle with
* things it doesn't understand...
*/
__u32 s_first_ino; /* First non-reserved inode */
__u16 s_inode_size; /* size of inode structure */
__u16 s_block_group_nr; /* block group # of this superblock */
__u32 s_feature_compat; /* compatible feature set */
/*60*/ __u32 s_feature_incompat; /* incompatible feature set */
__u32 s_feature_ro_compat; /* readonly-compatible feature set */
/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
/*78*/ char s_volume_name[16]; /* volume name */
/*88*/ char s_last_mounted[64]; /* directory where last mounted */
/*C8*/ __u32 s_algorithm_usage_bitmap; /* For compression */
/*
* Performance hints. Directory preallocation should only
* happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
*/
__u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
__u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
__u16 s_padding1;
/*
* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
*/
/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
/*E0*/ __u32 s_journal_inum; /* inode number of journal file */
__u32 s_journal_dev; /* device number of journal file */
__u32 s_last_orphan; /* start of list of inodes to delete */
__u32 s_hash_seed[4]; /* HTREE hash seed */
__u8 s_def_hash_version; /* Default hash version to use */
__u8 s_reserved_char_pad;
__u16 s_reserved_word_pad;
__u32 s_default_mount_opts;
__u32 s_first_meta_bg; /* First metablock block group */
__u32 s_reserved[190]; /* Padding to the end of the block */
};
#ifdef __KERNEL__
static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
{
return sb->s_fs_info;
}
static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
{
return container_of(inode, struct ext3_inode_info, vfs_inode);
}
#else
/* Assume that user mode programs are passing in an ext3fs superblock, not
* a kernel struct super_block. This will allow us to call the feature-test
* macros from user land. */
#define EXT3_SB(sb) (sb)
#endif
#define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
/*
* Codes for operating systems
*/
#define EXT3_OS_LINUX 0
#define EXT3_OS_HURD 1
#define EXT3_OS_MASIX 2
#define EXT3_OS_FREEBSD 3
#define EXT3_OS_LITES 4
/*
* Revision levels
*/
#define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
#define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
#define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
#define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
#define EXT3_GOOD_OLD_INODE_SIZE 128
/*
* Feature set definitions
*/
#define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
#define EXT3_SET_COMPAT_FEATURE(sb,mask) \
EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
#define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
#define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
#define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
#define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
#define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
#define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
#define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
#define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
#define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
#define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
EXT3_FEATURE_INCOMPAT_RECOVER| \
EXT3_FEATURE_INCOMPAT_META_BG)
#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
/*
* Default values for user and/or group using reserved blocks
*/
#define EXT3_DEF_RESUID 0
#define EXT3_DEF_RESGID 0
/*
* Default mount options
*/
#define EXT3_DEFM_DEBUG 0x0001
#define EXT3_DEFM_BSDGROUPS 0x0002
#define EXT3_DEFM_XATTR_USER 0x0004
#define EXT3_DEFM_ACL 0x0008
#define EXT3_DEFM_UID16 0x0010
#define EXT3_DEFM_JMODE 0x0060
#define EXT3_DEFM_JMODE_DATA 0x0020
#define EXT3_DEFM_JMODE_ORDERED 0x0040
#define EXT3_DEFM_JMODE_WBACK 0x0060
/*
* Structure of a directory entry
*/
#define EXT3_NAME_LEN 255
struct ext3_dir_entry {
__u32 inode; /* Inode number */
__u16 rec_len; /* Directory entry length */
__u16 name_len; /* Name length */
char name[EXT3_NAME_LEN]; /* File name */
};
/*
* The new version of the directory entry. Since EXT3 structures are
* stored in intel byte order, and the name_len field could never be
* bigger than 255 chars, it's safe to reclaim the extra byte for the
* file_type field.
*/
struct ext3_dir_entry_2 {
__u32 inode; /* Inode number */
__u16 rec_len; /* Directory entry length */
__u8 name_len; /* Name length */
__u8 file_type;
char name[EXT3_NAME_LEN]; /* File name */
};
/*
* Ext3 directory file types. Only the low 3 bits are used. The
* other bits are reserved for now.
*/
#define EXT3_FT_UNKNOWN 0
#define EXT3_FT_REG_FILE 1
#define EXT3_FT_DIR 2
#define EXT3_FT_CHRDEV 3
#define EXT3_FT_BLKDEV 4
#define EXT3_FT_FIFO 5
#define EXT3_FT_SOCK 6
#define EXT3_FT_SYMLINK 7
#define EXT3_FT_MAX 8
/*
* EXT3_DIR_PAD defines the directory entries boundaries
*
* NOTE: It must be a multiple of 4
*/
#define EXT3_DIR_PAD 4
#define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
#define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
~EXT3_DIR_ROUND)
/*
* Hash Tree Directory indexing
* (c) Daniel Phillips, 2001
*/
#ifdef CONFIG_EXT3_INDEX
#define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
EXT3_FEATURE_COMPAT_DIR_INDEX) && \
(EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
#define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
#else
#define is_dx(dir) 0
#define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
#endif
/* Legal values for the dx_root hash_version field: */
#define DX_HASH_LEGACY 0
#define DX_HASH_HALF_MD4 1
#define DX_HASH_TEA 2
/* hash info structure used by the directory hash */
struct dx_hash_info
{
u32 hash;
u32 minor_hash;
int hash_version;
u32 *seed;
};
#define EXT3_HTREE_EOF 0x7fffffff
#ifdef __KERNEL__
/*
* Control parameters used by ext3_htree_next_block
*/
#define HASH_NB_ALWAYS 1
/*
* Describe an inode's exact location on disk and in memory
*/
struct ext3_iloc
{
struct buffer_head *bh;
unsigned long offset;
unsigned long block_group;
};
static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
{
return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
}
/*
* This structure is stuffed into the struct file's private_data field
* for directories. It is where we put information so that we can do
* readdir operations in hash tree order.
*/
struct dir_private_info {
struct rb_root root;
struct rb_node *curr_node;
struct fname *extra_fname;
loff_t last_pos;
__u32 curr_hash;
__u32 curr_minor_hash;
__u32 next_hash;
};
/*
* Special error return code only used by dx_probe() and its callers.
*/
#define ERR_BAD_DX_DIR -75000
/*
* Function prototypes
*/
/*
* Ok, these declarations are also in <linux/kernel.h> but none of the
* ext3 source programs needs to include it so they are duplicated here.
*/
# define NORET_TYPE /**/
# define ATTRIB_NORET __attribute__((noreturn))
# define NORET_AND noreturn,
/* balloc.c */
extern int ext3_bg_has_super(struct super_block *sb, int group);
extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
extern int ext3_new_block (handle_t *, struct inode *, unsigned long,
__u32 *, __u32 *, int *);
extern void ext3_free_blocks (handle_t *, struct inode *, unsigned long,
unsigned long);
extern unsigned long ext3_count_free_blocks (struct super_block *);
extern void ext3_check_blocks_bitmap (struct super_block *);
extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
unsigned int block_group,
struct buffer_head ** bh);
/* dir.c */
extern int ext3_check_dir_entry(const char *, struct inode *,
struct ext3_dir_entry_2 *,
struct buffer_head *, unsigned long);
extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
__u32 minor_hash,
struct ext3_dir_entry_2 *dirent);
extern void ext3_htree_free_dir_info(struct dir_private_info *p);
/* fsync.c */
extern int ext3_sync_file (struct file *, struct dentry *, int);
/* hash.c */
extern int ext3fs_dirhash(const char *name, int len, struct
dx_hash_info *hinfo);
/* ialloc.c */
extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
extern void ext3_free_inode (handle_t *, struct inode *);
extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
extern unsigned long ext3_count_free_inodes (struct super_block *);
extern unsigned long ext3_count_dirs (struct super_block *);
extern void ext3_check_inodes_bitmap (struct super_block *);
extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
/* inode.c */
extern int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int);
extern struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
extern struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
extern void ext3_read_inode (struct inode *);
extern void ext3_write_inode (struct inode *, int);
extern int ext3_setattr (struct dentry *, struct iattr *);
extern void ext3_put_inode (struct inode *);
extern void ext3_delete_inode (struct inode *);
extern int ext3_sync_inode (handle_t *, struct inode *);
extern void ext3_discard_prealloc (struct inode *);
extern void ext3_dirty_inode(struct inode *);
extern int ext3_change_inode_journal_flag(struct inode *, int);
extern void ext3_truncate (struct inode *);
extern void ext3_set_inode_flags(struct inode *);
extern void ext3_set_aops(struct inode *inode);
/* ioctl.c */
extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
unsigned long);
/* namei.c */
extern int ext3_orphan_add(handle_t *, struct inode *);
extern int ext3_orphan_del(handle_t *, struct inode *);
extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
__u32 start_minor_hash, __u32 *next_hash);
/* super.c */
extern void ext3_error (struct super_block *, const char *, const char *, ...)
__attribute__ ((format (printf, 3, 4)));
extern void __ext3_std_error (struct super_block *, const char *, int);
extern void ext3_abort (struct super_block *, const char *, const char *, ...)
__attribute__ ((format (printf, 3, 4)));
extern NORET_TYPE void ext3_panic (struct super_block *, const char *,
const char *, ...)
__attribute__ ((NORET_AND format (printf, 3, 4)));
extern void ext3_warning (struct super_block *, const char *, const char *, ...)
__attribute__ ((format (printf, 3, 4)));
extern void ext3_update_dynamic_rev (struct super_block *sb);
extern void ext3_put_super (struct super_block *);
extern void ext3_write_super (struct super_block *);
extern void ext3_write_super_lockfs (struct super_block *);
extern void ext3_unlockfs (struct super_block *);
extern int ext3_remount (struct super_block *, int *, char *);
extern int ext3_statfs (struct super_block *, struct kstatfs *);
#define ext3_std_error(sb, errno) \
do { \
if ((errno)) \
__ext3_std_error((sb), __FUNCTION__, (errno)); \
} while (0)
extern const char *ext3_decode_error(struct super_block *sb, int errno, char nbuf[16]);
/*
* Inodes and files operations
*/
/* dir.c */
extern struct file_operations ext3_dir_operations;
/* file.c */
extern struct inode_operations ext3_file_inode_operations;
extern struct file_operations ext3_file_operations;
/* namei.c */
extern struct inode_operations ext3_dir_inode_operations;
extern struct inode_operations ext3_special_inode_operations;
/* symlink.c */
extern struct inode_operations ext3_symlink_inode_operations;
extern struct inode_operations ext3_fast_symlink_inode_operations;
#endif /* __KERNEL__ */
#endif /* _LINUX_EXT3_FS_H */