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Diffstat (limited to 'include/linux/ext3_fs.h')
| -rw-r--r-- | include/linux/ext3_fs.h | 980 |
1 files changed, 0 insertions, 980 deletions
diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h deleted file mode 100644 index f5a84eef6ed2..000000000000 --- a/include/linux/ext3_fs.h +++ /dev/null @@ -1,980 +0,0 @@ -/* - * 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/magic.h> -#include <linux/bug.h> - -/* - * 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 -/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ -#define EXT3_MAX_RESERVE_BLOCKS 1027 -#define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0 - -/* - * Debug code - */ -#ifdef EXT3FS_DEBUG -#define ext3_debug(f, a...) \ - do { \ - printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \ - __FILE__, __LINE__, __func__); \ - 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 - -/* - * 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 65536 -#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 */ - -/* Flags that should be inherited by new inodes from their parent. */ -#define EXT3_FL_INHERITED (EXT3_SECRM_FL | EXT3_UNRM_FL | EXT3_COMPR_FL |\ - EXT3_SYNC_FL | EXT3_NODUMP_FL |\ - EXT3_NOATIME_FL | EXT3_COMPRBLK_FL |\ - EXT3_NOCOMPR_FL | EXT3_JOURNAL_DATA_FL |\ - EXT3_NOTAIL_FL | EXT3_DIRSYNC_FL) - -/* Flags that are appropriate for regular files (all but dir-specific ones). */ -#define EXT3_REG_FLMASK (~(EXT3_DIRSYNC_FL | EXT3_TOPDIR_FL)) - -/* Flags that are appropriate for non-directories/regular files. */ -#define EXT3_OTHER_FLMASK (EXT3_NODUMP_FL | EXT3_NOATIME_FL) - -/* Mask out flags that are inappropriate for the given type of inode. */ -static inline __u32 ext3_mask_flags(umode_t mode, __u32 flags) -{ - if (S_ISDIR(mode)) - return flags; - else if (S_ISREG(mode)) - return flags & EXT3_REG_FLMASK; - else - return flags & EXT3_OTHER_FLMASK; -} - -/* 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 FS_IOC_GETFLAGS -#define EXT3_IOC_SETFLAGS FS_IOC_SETFLAGS -#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 FS_IOC_GETVERSION -#define EXT3_IOC_SETVERSION_OLD FS_IOC_SETVERSION -#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) - -/* - * ioctl commands in 32 bit emulation - */ -#define EXT3_IOC32_GETFLAGS FS_IOC32_GETFLAGS -#define EXT3_IOC32_SETFLAGS FS_IOC32_SETFLAGS -#define EXT3_IOC32_GETVERSION _IOR('f', 3, int) -#define EXT3_IOC32_SETVERSION _IOW('f', 4, int) -#define EXT3_IOC32_GETRSVSZ _IOR('f', 5, int) -#define EXT3_IOC32_SETRSVSZ _IOW('f', 6, int) -#define EXT3_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) -#ifdef CONFIG_JBD_DEBUG -#define EXT3_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) -#endif -#define EXT3_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION -#define EXT3_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION - - -/* - * 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 */ - -/* - * Misc. filesystem flags - */ -#define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ -#define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ -#define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ - -/* - * Mount flags - */ -#define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */ -/* EXT3_MOUNT_OLDALLOC was there */ -#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_QUOTA 0x80000 /* Some quota option set */ -#define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ -#define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ -#define EXT3_MOUNT_DATA_ERR_ABORT 0x400000 /* Abort on file data write - * error in ordered mode */ - -/* 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 __set_bit_le -#define ext3_set_bit_atomic ext2_set_bit_atomic -#define ext3_clear_bit __clear_bit_le -#define ext3_clear_bit_atomic ext2_clear_bit_atomic -#define ext3_test_bit test_bit_le -#define ext3_find_next_zero_bit find_next_zero_bit_le - -/* - * 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 */ - __le16 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 */ - __le32 s_mkfs_time; /* When the filesystem was created */ - __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ - /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ -/*150*/ __le32 s_blocks_count_hi; /* Blocks count */ - __le32 s_r_blocks_count_hi; /* Reserved blocks count */ - __le32 s_free_blocks_count_hi; /* Free blocks count */ - __le16 s_min_extra_isize; /* All inodes have at least # bytes */ - __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ - __le32 s_flags; /* Miscellaneous flags */ - __le16 s_raid_stride; /* RAID stride */ - __le16 s_mmp_interval; /* # seconds to wait in MMP checking */ - __le64 s_mmp_block; /* Block for multi-mount protection */ - __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ - __u8 s_log_groups_per_flex; /* FLEX_BG group size */ - __u8 s_reserved_char_pad2; - __le16 s_reserved_pad; - __u32 s_reserved[162]; /* Padding to the end of the block */ -}; - -#ifdef __KERNEL__ -#include <linux/ext3_fs_i.h> -#include <linux/ext3_fs_sb.h> -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); -} - -static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino) -{ - return ino == EXT3_ROOT_INO || - ino == EXT3_JOURNAL_INO || - ino == EXT3_RESIZE_INO || - (ino >= EXT3_FIRST_INO(sb) && - ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)); -} - -/* - * Inode dynamic state flags - */ -enum { - EXT3_STATE_JDATA, /* journaled data exists */ - EXT3_STATE_NEW, /* inode is newly created */ - EXT3_STATE_XATTR, /* has in-inode xattrs */ - EXT3_STATE_FLUSH_ON_CLOSE, /* flush dirty pages on close */ -}; - -static inline int ext3_test_inode_state(struct inode *inode, int bit) -{ - return test_bit(bit, &EXT3_I(inode)->i_state_flags); -} - -static inline void ext3_set_inode_state(struct inode *inode, int bit) -{ - set_bit(bit, &EXT3_I(inode)->i_state_flags); -} - -static inline void ext3_clear_inode_state(struct inode *inode, int bit) -{ - clear_bit(bit, &EXT3_I(inode)->i_state_flags); -} -#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) -#define EXT3_MAX_REC_LEN ((1<<16)-1) - -/* - * Tests against MAX_REC_LEN etc were put in place for 64k block - * sizes; if that is not possible on this arch, we can skip - * those tests and speed things up. - */ -static inline unsigned ext3_rec_len_from_disk(__le16 dlen) -{ - unsigned len = le16_to_cpu(dlen); - -#if (PAGE_CACHE_SIZE >= 65536) - if (len == EXT3_MAX_REC_LEN) - return 1 << 16; -#endif - return len; -} - -static inline __le16 ext3_rec_len_to_disk(unsigned len) -{ -#if (PAGE_CACHE_SIZE >= 65536) - if (len == (1 << 16)) - return cpu_to_le16(EXT3_MAX_REC_LEN); - else if (len > (1 << 16)) - BUG(); -#endif - return cpu_to_le16(len); -} - -/* - * Hash Tree Directory indexing - * (c) Daniel Phillips, 2001 - */ - -#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) - -/* 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 -#define DX_HASH_LEGACY_UNSIGNED 3 -#define DX_HASH_HALF_MD4_UNSIGNED 4 -#define DX_HASH_TEA_UNSIGNED 5 - -#ifdef __KERNEL__ - -/* 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 - -/* - * 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; -}; - -/* calculate the first block number of the group */ -static inline ext3_fsblk_t -ext3_group_first_block_no(struct super_block *sb, unsigned long group_no) -{ - return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) + - le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block); -} - -/* - * 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 ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode, - ext3_fsblk_t goal, int *errp); -extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode, - ext3_fsblk_t goal, unsigned long *count, int *errp); -extern void ext3_free_blocks (handle_t *handle, struct inode *inode, - ext3_fsblk_t block, unsigned long count); -extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb, - ext3_fsblk_t block, unsigned long count, - unsigned long *pdquot_freed_blocks); -extern ext3_fsblk_t 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); -extern int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range); - -/* 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 *, loff_t, loff_t, 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 *, - const struct qstr *, umode_t); -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 *handle, int is_metadata, struct inode *inode, - struct buffer_head *bh, ext3_fsblk_t blocknr); -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); - -extern struct inode *ext3_iget(struct super_block *, unsigned long); -extern int ext3_write_inode (struct inode *, struct writeback_control *); -extern int ext3_setattr (struct dentry *, struct iattr *); -extern void ext3_evict_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 *, int); -extern int ext3_change_inode_journal_flag(struct inode *, int); -extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *); -extern int ext3_can_truncate(struct inode *inode); -extern void ext3_truncate(struct inode *inode); -extern void ext3_set_inode_flags(struct inode *); -extern void ext3_get_inode_flags(struct ext3_inode_info *); -extern void ext3_set_aops(struct inode *inode); -extern int ext3_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, - u64 start, u64 len); - -/* ioctl.c */ -extern long ext3_ioctl(struct file *, unsigned int, unsigned long); -extern long ext3_compat_ioctl(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, - ext3_fsblk_t n_blocks_count); - -/* super.c */ -extern __printf(3, 4) -void ext3_error(struct super_block *, const char *, const char *, ...); -extern void __ext3_std_error (struct super_block *, const char *, int); -extern __printf(3, 4) -void ext3_abort(struct super_block *, const char *, const char *, ...); -extern __printf(3, 4) -void ext3_warning(struct super_block *, const char *, const char *, ...); -extern __printf(3, 4) -void ext3_msg(struct super_block *, const char *, const char *, ...); -extern void ext3_update_dynamic_rev (struct super_block *sb); - -#define ext3_std_error(sb, errno) \ -do { \ - if ((errno)) \ - __ext3_std_error((sb), __func__, (errno)); \ -} while (0) - -/* - * Inodes and files operations - */ - -/* dir.c */ -extern const struct file_operations ext3_dir_operations; - -/* file.c */ -extern const struct inode_operations ext3_file_inode_operations; -extern const struct file_operations ext3_file_operations; - -/* namei.c */ -extern const struct inode_operations ext3_dir_inode_operations; -extern const struct inode_operations ext3_special_inode_operations; - -/* symlink.c */ -extern const struct inode_operations ext3_symlink_inode_operations; -extern const struct inode_operations ext3_fast_symlink_inode_operations; - - -#endif /* __KERNEL__ */ - -#endif /* _LINUX_EXT3_FS_H */ |