/* * Written by Stephen C. Tweedie , 1999 * * Copyright 1998--1999 Red Hat corp --- All Rights Reserved * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. * * 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 */ #include #include #include #include #include /* * 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 #define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize) #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32)) #define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) #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) /* * 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 #define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size) #define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block) /* * 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 */ #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) /* * 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; kuid_t s_resuid; kgid_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 #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 /* * 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 */ }; /* data type for block offset of block group */ typedef int ext3_grpblk_t; /* data type for filesystem-wide blocks number */ typedef unsigned long ext3_fsblk_t; #define E3FSBLK "%lu" struct ext3_reserve_window { ext3_fsblk_t _rsv_start; /* First byte reserved */ ext3_fsblk_t _rsv_end; /* Last byte reserved or 0 */ }; struct ext3_reserve_window_node { struct rb_node rsv_node; __u32 rsv_goal_size; __u32 rsv_alloc_hit; struct ext3_reserve_window rsv_window; }; struct ext3_block_alloc_info { /* information about reservation window */ struct ext3_reserve_window_node rsv_window_node; /* * was i_next_alloc_block in ext3_inode_info * is the logical (file-relative) number of the * most-recently-allocated block in this file. * We use this for detecting linearly ascending allocation requests. */ __u32 last_alloc_logical_block; /* * Was i_next_alloc_goal in ext3_inode_info * is the *physical* companion to i_next_alloc_block. * it the physical block number of the block which was most-recentl * allocated to this file. This give us the goal (target) for the next * allocation when we detect linearly ascending requests. */ ext3_fsblk_t last_alloc_physical_block; }; #define rsv_start rsv_window._rsv_start #define rsv_end rsv_window._rsv_end /* * third extended file system inode data in memory */ struct ext3_inode_info { __le32 i_data[15]; /* unconverted */ __u32 i_flags; #ifdef EXT3_FRAGMENTS __u32 i_faddr; __u8 i_frag_no; __u8 i_frag_size; #endif ext3_fsblk_t i_file_acl; __u32 i_dir_acl; __u32 i_dtime; /* * i_block_group is the number of the block group which contains * this file's inode. Constant across the lifetime of the inode, * it is ued for making block allocation decisions - we try to * place a file's data blocks near its inode block, and new inodes * near to their parent directory's inode. */ __u32 i_block_group; unsigned long i_state_flags; /* Dynamic state flags for ext3 */ /* block reservation info */ struct ext3_block_alloc_info *i_block_alloc_info; __u32 i_dir_start_lookup; #ifdef CONFIG_EXT3_FS_XATTR /* * Extended attributes can be read independently of the main file * data. Taking i_mutex even when reading would cause contention * between readers of EAs and writers of regular file data, so * instead we synchronize on xattr_sem when reading or changing * EAs. */ struct rw_semaphore xattr_sem; #endif struct list_head i_orphan; /* unlinked but open inodes */ /* * i_disksize keeps track of what the inode size is ON DISK, not * in memory. During truncate, i_size is set to the new size by * the VFS prior to calling ext3_truncate(), but the filesystem won't * set i_disksize to 0 until the truncate is actually under way. * * The intent is that i_disksize always represents the blocks which * are used by this file. This allows recovery to restart truncate * on orphans if we crash during truncate. We actually write i_disksize * into the on-disk inode when writing inodes out, instead of i_size. * * The only time when i_disksize and i_size may be different is when * a truncate is in progress. The only things which change i_disksize * are ext3_get_block (growth) and ext3_truncate (shrinkth). */ loff_t i_disksize; /* on-disk additional length */ __u16 i_extra_isize; /* * truncate_mutex is for serialising ext3_truncate() against * ext3_getblock(). In the 2.4 ext2 design, great chunks of inode's * data tree are chopped off during truncate. We can't do that in * ext3 because whenever we perform intermediate commits during * truncate, the inode and all the metadata blocks *must* be in a * consistent state which allows truncation of the orphans to restart * during recovery. Hence we must fix the get_block-vs-truncate race * by other means, so we have truncate_mutex. */ struct mutex truncate_mutex; /* * Transactions that contain inode's metadata needed to complete * fsync and fdatasync, respectively. */ atomic_t i_sync_tid; atomic_t i_datasync_tid; struct inode vfs_inode; }; /* * third extended-fs super-block data in memory */ struct ext3_sb_info { unsigned long s_frag_size; /* Size of a fragment in bytes */ unsigned long s_frags_per_block;/* Number of fragments per block */ unsigned long s_inodes_per_block;/* Number of inodes per block */ unsigned long s_frags_per_group;/* Number of fragments in a group */ unsigned long s_blocks_per_group;/* Number of blocks in a group */ unsigned long s_inodes_per_group;/* Number of inodes in a group */ unsigned long s_itb_per_group; /* Number of inode table blocks per group */ unsigned long s_gdb_count; /* Number of group descriptor blocks */ unsigned long s_desc_per_block; /* Number of group descriptors per block */ unsigned long s_groups_count; /* Number of groups in the fs */ unsigned long s_overhead_last; /* Last calculated overhead */ unsigned long s_blocks_last; /* Last seen block count */ struct buffer_head * s_sbh; /* Buffer containing the super block */ struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */ struct buffer_head ** s_group_desc; unsigned long s_mount_opt; ext3_fsblk_t s_sb_block; kuid_t s_resuid; kgid_t s_resgid; unsigned short s_mount_state; unsigned short s_pad; int s_addr_per_block_bits; int s_desc_per_block_bits; int s_inode_size; int s_first_ino; spinlock_t s_next_gen_lock; u32 s_next_generation; u32 s_hash_seed[4]; int s_def_hash_version; int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ struct percpu_counter s_freeblocks_counter; struct percpu_counter s_freeinodes_counter; struct percpu_counter s_dirs_counter; struct blockgroup_lock *s_blockgroup_lock; /* root of the per fs reservation window tree */ spinlock_t s_rsv_window_lock; struct rb_root s_rsv_window_root; struct ext3_reserve_window_node s_rsv_window_head; /* Journaling */ struct inode * s_journal_inode; struct journal_s * s_journal; struct list_head s_orphan; struct mutex s_orphan_lock; struct mutex s_resize_lock; unsigned long s_commit_interval; struct block_device *journal_bdev; #ifdef CONFIG_QUOTA char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */ int s_jquota_fmt; /* Format of quota to use */ #endif }; static inline spinlock_t * sb_bgl_lock(struct ext3_sb_info *sbi, unsigned int block_group) { return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group); } 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); } #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 /* hash info structure used by the directory hash */ struct dx_hash_info { u32 hash; u32 minor_hash; int hash_version; u32 *seed; }; /* 32 and 64 bit signed EOF for dx directories */ #define EXT3_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) #define EXT3_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) /* * 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 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; #define EXT3_JOURNAL(inode) (EXT3_SB((inode)->i_sb)->s_journal) /* Define the number of blocks we need to account to a transaction to * modify one block of data. * * We may have to touch one inode, one bitmap buffer, up to three * indirection blocks, the group and superblock summaries, and the data * block to complete the transaction. */ #define EXT3_SINGLEDATA_TRANS_BLOCKS 8U /* Extended attribute operations touch at most two data buffers, * two bitmap buffers, and two group summaries, in addition to the inode * and the superblock, which are already accounted for. */ #define EXT3_XATTR_TRANS_BLOCKS 6U /* Define the minimum size for a transaction which modifies data. This * needs to take into account the fact that we may end up modifying two * quota files too (one for the group, one for the user quota). The * superblock only gets updated once, of course, so don't bother * counting that again for the quota updates. */ #define EXT3_DATA_TRANS_BLOCKS(sb) (EXT3_SINGLEDATA_TRANS_BLOCKS + \ EXT3_XATTR_TRANS_BLOCKS - 2 + \ EXT3_MAXQUOTAS_TRANS_BLOCKS(sb)) /* Delete operations potentially hit one directory's namespace plus an * entire inode, plus arbitrary amounts of bitmap/indirection data. Be * generous. We can grow the delete transaction later if necessary. */ #define EXT3_DELETE_TRANS_BLOCKS(sb) (EXT3_MAXQUOTAS_TRANS_BLOCKS(sb) + 64) /* Define an arbitrary limit for the amount of data we will anticipate * writing to any given transaction. For unbounded transactions such as * write(2) and truncate(2) we can write more than this, but we always * start off at the maximum transaction size and grow the transaction * optimistically as we go. */ #define EXT3_MAX_TRANS_DATA 64U /* We break up a large truncate or write transaction once the handle's * buffer credits gets this low, we need either to extend the * transaction or to start a new one. Reserve enough space here for * inode, bitmap, superblock, group and indirection updates for at least * one block, plus two quota updates. Quota allocations are not * needed. */ #define EXT3_RESERVE_TRANS_BLOCKS 12U #define EXT3_INDEX_EXTRA_TRANS_BLOCKS 8 #ifdef CONFIG_QUOTA /* Amount of blocks needed for quota update - we know that the structure was * allocated so we need to update only inode+data */ #define EXT3_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0) /* Amount of blocks needed for quota insert/delete - we do some block writes * but inode, sb and group updates are done only once */ #define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\ (EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0) #define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\ (EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0) #else #define EXT3_QUOTA_TRANS_BLOCKS(sb) 0 #define EXT3_QUOTA_INIT_BLOCKS(sb) 0 #define EXT3_QUOTA_DEL_BLOCKS(sb) 0 #endif #define EXT3_MAXQUOTAS_TRANS_BLOCKS(sb) (MAXQUOTAS*EXT3_QUOTA_TRANS_BLOCKS(sb)) #define EXT3_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT3_QUOTA_INIT_BLOCKS(sb)) #define EXT3_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT3_QUOTA_DEL_BLOCKS(sb)) int ext3_mark_iloc_dirty(handle_t *handle, struct inode *inode, struct ext3_iloc *iloc); /* * On success, We end up with an outstanding reference count against * iloc->bh. This _must_ be cleaned up later. */ int ext3_reserve_inode_write(handle_t *handle, struct inode *inode, struct ext3_iloc *iloc); int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode); /* * Wrapper functions with which ext3 calls into JBD. The intent here is * to allow these to be turned into appropriate stubs so ext3 can control * ext2 filesystems, so ext2+ext3 systems only nee one fs. This work hasn't * been done yet. */ static inline void ext3_journal_release_buffer(handle_t *handle, struct buffer_head *bh) { journal_release_buffer(handle, bh); } void ext3_journal_abort_handle(const char *caller, const char *err_fn, struct buffer_head *bh, handle_t *handle, int err); int __ext3_journal_get_undo_access(const char *where, handle_t *handle, struct buffer_head *bh); int __ext3_journal_get_write_access(const char *where, handle_t *handle, struct buffer_head *bh); int __ext3_journal_forget(const char *where, handle_t *handle, struct buffer_head *bh); int __ext3_journal_revoke(const char *where, handle_t *handle, unsigned long blocknr, struct buffer_head *bh); int __ext3_journal_get_create_access(const char *where, handle_t *handle, struct buffer_head *bh); int __ext3_journal_dirty_metadata(const char *where, handle_t *handle, struct buffer_head *bh); #define ext3_journal_get_undo_access(handle, bh) \ __ext3_journal_get_undo_access(__func__, (handle), (bh)) #define ext3_journal_get_write_access(handle, bh) \ __ext3_journal_get_write_access(__func__, (handle), (bh)) #define ext3_journal_revoke(handle, blocknr, bh) \ __ext3_journal_revoke(__func__, (handle), (blocknr), (bh)) #define ext3_journal_get_create_access(handle, bh) \ __ext3_journal_get_create_access(__func__, (handle), (bh)) #define ext3_journal_dirty_metadata(handle, bh) \ __ext3_journal_dirty_metadata(__func__, (handle), (bh)) #define ext3_journal_forget(handle, bh) \ __ext3_journal_forget(__func__, (handle), (bh)) int ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh); handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks); int __ext3_journal_stop(const char *where, handle_t *handle); static inline handle_t *ext3_journal_start(struct inode *inode, int nblocks) { return ext3_journal_start_sb(inode->i_sb, nblocks); } #define ext3_journal_stop(handle) \ __ext3_journal_stop(__func__, (handle)) static inline handle_t *ext3_journal_current_handle(void) { return journal_current_handle(); } static inline int ext3_journal_extend(handle_t *handle, int nblocks) { return journal_extend(handle, nblocks); } static inline int ext3_journal_restart(handle_t *handle, int nblocks) { return journal_restart(handle, nblocks); } static inline int ext3_journal_blocks_per_page(struct inode *inode) { return journal_blocks_per_page(inode); } static inline int ext3_journal_force_commit(journal_t *journal) { return journal_force_commit(journal); } /* super.c */ int ext3_force_commit(struct super_block *sb); static inline int ext3_should_journal_data(struct inode *inode) { if (!S_ISREG(inode->i_mode)) return 1; if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA) return 1; if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL) return 1; return 0; } static inline int ext3_should_order_data(struct inode *inode) { if (!S_ISREG(inode->i_mode)) return 0; if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL) return 0; if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA) return 1; return 0; } static inline int ext3_should_writeback_data(struct inode *inode) { if (!S_ISREG(inode->i_mode)) return 0; if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL) return 0; if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA) return 1; return 0; } #include