| /* |
| * 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_RESERVATION to reserve data blocks for expanding files |
| */ |
| #define EXT3_DEFAULT_RESERVE_BLOCKS 8 |
| #define EXT3_MAX_RESERVE_BLOCKS 1024 |
| #define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0 |
| /* |
| * 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 |
| { |
| __le32 bg_block_bitmap; /* Blocks bitmap block */ |
| __le32 bg_inode_bitmap; /* Inodes bitmap block */ |
| __le32 bg_inode_table; /* Inodes table block */ |
| __le16 bg_free_blocks_count; /* Free blocks count */ |
| __le16 bg_free_inodes_count; /* Free inodes count */ |
| __le16 bg_used_dirs_count; /* Directories count */ |
| __u16 bg_pad; |
| __le32 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 */ |
| #define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */ |
| |
| /* Used to pass group descriptor data when online resize is done */ |
| struct ext3_new_group_input { |
| __u32 group; /* Group number for this data */ |
| __u32 block_bitmap; /* Absolute block number of block bitmap */ |
| __u32 inode_bitmap; /* Absolute block number of inode bitmap */ |
| __u32 inode_table; /* Absolute block number of inode table start */ |
| __u32 blocks_count; /* Total number of blocks in this group */ |
| __u16 reserved_blocks; /* Number of reserved blocks in this group */ |
| __u16 unused; |
| }; |
| |
| /* The struct ext3_new_group_input in kernel space, with free_blocks_count */ |
| struct ext3_new_group_data { |
| __u32 group; |
| __u32 block_bitmap; |
| __u32 inode_bitmap; |
| __u32 inode_table; |
| __u32 blocks_count; |
| __u16 reserved_blocks; |
| __u16 unused; |
| __u32 free_blocks_count; |
| }; |
| |
| |
| /* |
| * 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_GROUP_EXTEND _IOW('f', 7, unsigned long) |
| #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input) |
| #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 |
| #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long) |
| #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long) |
| |
| /* |
| * Mount options |
| */ |
| struct ext3_mount_options { |
| unsigned long s_mount_opt; |
| uid_t s_resuid; |
| gid_t s_resgid; |
| unsigned long s_commit_interval; |
| #ifdef CONFIG_QUOTA |
| int s_jquota_fmt; |
| char *s_qf_names[MAXQUOTAS]; |
| #endif |
| }; |
| |
| /* |
| * Structure of an inode on the disk |
| */ |
| struct ext3_inode { |
| __le16 i_mode; /* File mode */ |
| __le16 i_uid; /* Low 16 bits of Owner Uid */ |
| __le32 i_size; /* Size in bytes */ |
| __le32 i_atime; /* Access time */ |
| __le32 i_ctime; /* Creation time */ |
| __le32 i_mtime; /* Modification time */ |
| __le32 i_dtime; /* Deletion Time */ |
| __le16 i_gid; /* Low 16 bits of Group Id */ |
| __le16 i_links_count; /* Links count */ |
| __le32 i_blocks; /* Blocks count */ |
| __le32 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 */ |
| __le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */ |
| __le32 i_generation; /* File version (for NFS) */ |
| __le32 i_file_acl; /* File ACL */ |
| __le32 i_dir_acl; /* Directory ACL */ |
| __le32 i_faddr; /* Fragment address */ |
| union { |
| struct { |
| __u8 l_i_frag; /* Fragment number */ |
| __u8 l_i_fsize; /* Fragment size */ |
| __u16 i_pad1; |
| __le16 l_i_uid_high; /* these 2 fields */ |
| __le16 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 */ |
| __le16 i_extra_isize; |
| __le16 i_pad1; |
| }; |
| |
| #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 0x00001 /* Do mount-time checks */ |
| #define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ |
| #define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */ |
| #define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */ |
| #define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ |
| #define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ |
| #define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ |
| #define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ |
| #define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ |
| #define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */ |
| #define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ |
| #define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ |
| #define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ |
| #define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ |
| #define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ |
| #define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ |
| #define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ |
| #define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ |
| #define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */ |
| #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */ |
| #define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */ |
| #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */ |
| #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ |
| #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ |
| |
| /* 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*/ __le32 s_inodes_count; /* Inodes count */ |
| __le32 s_blocks_count; /* Blocks count */ |
| __le32 s_r_blocks_count; /* Reserved blocks count */ |
| __le32 s_free_blocks_count; /* Free blocks count */ |
| /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ |
| __le32 s_first_data_block; /* First Data Block */ |
| __le32 s_log_block_size; /* Block size */ |
| __le32 s_log_frag_size; /* Fragment size */ |
| /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ |
| __le32 s_frags_per_group; /* # Fragments per group */ |
| __le32 s_inodes_per_group; /* # Inodes per group */ |
| __le32 s_mtime; /* Mount time */ |
| /*30*/ __le32 s_wtime; /* Write time */ |
| __le16 s_mnt_count; /* Mount count */ |
| __le16 s_max_mnt_count; /* Maximal mount count */ |
| __le16 s_magic; /* Magic signature */ |
| __le16 s_state; /* File system state */ |
| __le16 s_errors; /* Behaviour when detecting errors */ |
| __le16 s_minor_rev_level; /* minor revision level */ |
| /*40*/ __le32 s_lastcheck; /* time of last check */ |
| __le32 s_checkinterval; /* max. time between checks */ |
| __le32 s_creator_os; /* OS */ |
| __le32 s_rev_level; /* Revision level */ |
| /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ |
| __le16 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... |
| */ |
| __le32 s_first_ino; /* First non-reserved inode */ |
| __le16 s_inode_size; /* size of inode structure */ |
| __le16 s_block_group_nr; /* block group # of this superblock */ |
| __le32 s_feature_compat; /* compatible feature set */ |
| /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ |
| __le32 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*/ __le32 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_reserved_gdt_blocks; /* Per group desc for online growth */ |
| /* |
| * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. |
| */ |
| /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ |
| /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ |
| __le32 s_journal_dev; /* device number of journal file */ |
| __le32 s_last_orphan; /* start of list of inodes to delete */ |
| __le32 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; |
| __le32 s_default_mount_opts; |
| __le32 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 { |
| __le32 inode; /* Inode number */ |
| __le16 rec_len; /* Directory entry length */ |
| __le16 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 { |
| __le32 inode; /* Inode number */ |
| __le16 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, int *); |
| extern void ext3_free_blocks (handle_t *, struct inode *, unsigned long, |
| unsigned long); |
| extern void ext3_free_blocks_sb (handle_t *, struct super_block *, |
| unsigned long, unsigned long, int *); |
| 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); |
| extern int ext3_should_retry_alloc(struct super_block *sb, int *retries); |
| extern void ext3_init_block_alloc_info(struct inode *); |
| extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv); |
| |
| /* 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 */ |
| int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int); |
| struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *); |
| struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *); |
| int ext3_get_blocks_handle(handle_t *handle, struct inode *inode, |
| sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, |
| int create, int extend_disksize); |
| |
| extern void ext3_read_inode (struct inode *); |
| extern int ext3_write_inode (struct inode *, int); |
| extern int ext3_setattr (struct dentry *, struct iattr *); |
| extern void ext3_delete_inode (struct inode *); |
| extern int ext3_sync_inode (handle_t *, struct inode *); |
| extern void ext3_discard_reservation (struct inode *); |
| extern void ext3_dirty_inode(struct inode *); |
| extern int ext3_change_inode_journal_flag(struct inode *, int); |
| extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *); |
| 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); |
| |
| /* resize.c */ |
| extern int ext3_group_add(struct super_block *sb, |
| struct ext3_new_group_data *input); |
| extern int ext3_group_extend(struct super_block *sb, |
| struct ext3_super_block *es, |
| unsigned long n_blocks_count); |
| |
| /* 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 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); |
| |
| #define ext3_std_error(sb, errno) \ |
| do { \ |
| if ((errno)) \ |
| __ext3_std_error((sb), __FUNCTION__, (errno)); \ |
| } while (0) |
| |
| /* |
| * 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 */ |