diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ext4_fs.h | 1207 | ||||
| -rw-r--r-- | include/linux/ext4_fs_extents.h | 232 | ||||
| -rw-r--r-- | include/linux/ext4_fs_i.h | 167 | ||||
| -rw-r--r-- | include/linux/ext4_fs_sb.h | 148 | ||||
| -rw-r--r-- | include/linux/ext4_jbd2.h | 231 |
5 files changed, 0 insertions, 1985 deletions
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h deleted file mode 100644 index 25003254859..00000000000 --- a/include/linux/ext4_fs.h +++ /dev/null @@ -1,1207 +0,0 @@ -/* - * linux/include/linux/ext4_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_EXT4_FS_H -#define _LINUX_EXT4_FS_H - -#include <linux/types.h> -#include <linux/blkdev.h> -#include <linux/magic.h> - -#include <linux/ext4_fs_i.h> - -/* - * The second extended filesystem constants/structures - */ - -/* - * Define EXT4FS_DEBUG to produce debug messages - */ -#undef EXT4FS_DEBUG - -/* - * Define EXT4_RESERVATION to reserve data blocks for expanding files - */ -#define EXT4_DEFAULT_RESERVE_BLOCKS 8 -/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ -#define EXT4_MAX_RESERVE_BLOCKS 1027 -#define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0 - -/* - * Debug code - */ -#ifdef EXT4FS_DEBUG -#define ext4_debug(f, a...) \ - do { \ - printk (KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ - __FILE__, __LINE__, __FUNCTION__); \ - printk (KERN_DEBUG f, ## a); \ - } while (0) -#else -#define ext4_debug(f, a...) do {} while (0) -#endif - -#define EXT4_MULTIBLOCK_ALLOCATOR 1 - -/* prefer goal again. length */ -#define EXT4_MB_HINT_MERGE 1 -/* blocks already reserved */ -#define EXT4_MB_HINT_RESERVED 2 -/* metadata is being allocated */ -#define EXT4_MB_HINT_METADATA 4 -/* first blocks in the file */ -#define EXT4_MB_HINT_FIRST 8 -/* search for the best chunk */ -#define EXT4_MB_HINT_BEST 16 -/* data is being allocated */ -#define EXT4_MB_HINT_DATA 32 -/* don't preallocate (for tails) */ -#define EXT4_MB_HINT_NOPREALLOC 64 -/* allocate for locality group */ -#define EXT4_MB_HINT_GROUP_ALLOC 128 -/* allocate goal blocks or none */ -#define EXT4_MB_HINT_GOAL_ONLY 256 -/* goal is meaningful */ -#define EXT4_MB_HINT_TRY_GOAL 512 - -struct ext4_allocation_request { - /* target inode for block we're allocating */ - struct inode *inode; - /* logical block in target inode */ - ext4_lblk_t logical; - /* phys. target (a hint) */ - ext4_fsblk_t goal; - /* the closest logical allocated block to the left */ - ext4_lblk_t lleft; - /* phys. block for ^^^ */ - ext4_fsblk_t pleft; - /* the closest logical allocated block to the right */ - ext4_lblk_t lright; - /* phys. block for ^^^ */ - ext4_fsblk_t pright; - /* how many blocks we want to allocate */ - unsigned long len; - /* flags. see above EXT4_MB_HINT_* */ - unsigned long flags; -}; - -/* - * Special inodes numbers - */ -#define EXT4_BAD_INO 1 /* Bad blocks inode */ -#define EXT4_ROOT_INO 2 /* Root inode */ -#define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ -#define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ -#define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ -#define EXT4_JOURNAL_INO 8 /* Journal inode */ - -/* First non-reserved inode for old ext4 filesystems */ -#define EXT4_GOOD_OLD_FIRST_INO 11 - -/* - * Maximal count of links to a file - */ -#define EXT4_LINK_MAX 65000 - -/* - * Macro-instructions used to manage several block sizes - */ -#define EXT4_MIN_BLOCK_SIZE 1024 -#define EXT4_MAX_BLOCK_SIZE 65536 -#define EXT4_MIN_BLOCK_LOG_SIZE 10 -#ifdef __KERNEL__ -# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) -#else -# define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) -#endif -#define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof (__u32)) -#ifdef __KERNEL__ -# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) -#else -# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) -#endif -#ifdef __KERNEL__ -#define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) -#define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) -#define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) -#else -#define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ - EXT4_GOOD_OLD_INODE_SIZE : \ - (s)->s_inode_size) -#define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ - EXT4_GOOD_OLD_FIRST_INO : \ - (s)->s_first_ino) -#endif -#define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) - -/* - * Structure of a blocks group descriptor - */ -struct ext4_group_desc -{ - __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ - __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ - __le32 bg_inode_table_lo; /* 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 */ - __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ - __u32 bg_reserved[2]; /* Likely block/inode bitmap checksum */ - __le16 bg_itable_unused; /* Unused inodes count */ - __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ - __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ - __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ - __le32 bg_inode_table_hi; /* Inodes table block MSB */ - __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ - __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ - __le16 bg_used_dirs_count_hi; /* Directories count MSB */ - __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ - __u32 bg_reserved2[3]; -}; - -#define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ -#define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ -#define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ - -#ifdef __KERNEL__ -#include <linux/ext4_fs_i.h> -#include <linux/ext4_fs_sb.h> -#endif -/* - * Macro-instructions used to manage group descriptors - */ -#define EXT4_MIN_DESC_SIZE 32 -#define EXT4_MIN_DESC_SIZE_64BIT 64 -#define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE -#define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) -#ifdef __KERNEL__ -# define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) -# define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) -# define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) -# define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) -#else -# define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) -# define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) -# define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) -#endif - -/* - * Constants relative to the data blocks - */ -#define EXT4_NDIR_BLOCKS 12 -#define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS -#define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) -#define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) -#define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) - -/* - * Inode flags - */ -#define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ -#define EXT4_UNRM_FL 0x00000002 /* Undelete */ -#define EXT4_COMPR_FL 0x00000004 /* Compress file */ -#define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ -#define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ -#define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ -#define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ -#define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ -/* Reserved for compression usage... */ -#define EXT4_DIRTY_FL 0x00000100 -#define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ -#define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ -#define EXT4_ECOMPR_FL 0x00000800 /* Compression error */ -/* End compression flags --- maybe not all used */ -#define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ -#define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ -#define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ -#define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ -#define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ -#define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ -#define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ -#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ -#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ - -#define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ -#define EXT4_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ - -/* - * Inode dynamic state flags - */ -#define EXT4_STATE_JDATA 0x00000001 /* journaled data exists */ -#define EXT4_STATE_NEW 0x00000002 /* inode is newly created */ -#define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */ -#define EXT4_STATE_NO_EXPAND 0x00000008 /* No space for expansion */ - -/* Used to pass group descriptor data when online resize is done */ -struct ext4_new_group_input { - __u32 group; /* Group number for this data */ - __u64 block_bitmap; /* Absolute block number of block bitmap */ - __u64 inode_bitmap; /* Absolute block number of inode bitmap */ - __u64 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 ext4_new_group_input in kernel space, with free_blocks_count */ -struct ext4_new_group_data { - __u32 group; - __u64 block_bitmap; - __u64 inode_bitmap; - __u64 inode_table; - __u32 blocks_count; - __u16 reserved_blocks; - __u16 unused; - __u32 free_blocks_count; -}; - -/* - * Following is used by preallocation code to tell get_blocks() that we - * want uninitialzed extents. - */ -#define EXT4_CREATE_UNINITIALIZED_EXT 2 - -/* - * ioctl commands - */ -#define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS -#define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS -#define EXT4_IOC_GETVERSION _IOR('f', 3, long) -#define EXT4_IOC_SETVERSION _IOW('f', 4, long) -#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) -#define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input) -#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION -#define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION -#ifdef CONFIG_JBD2_DEBUG -#define EXT4_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) -#endif -#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) -#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) -#define EXT4_IOC_MIGRATE _IO('f', 7) - -/* - * ioctl commands in 32 bit emulation - */ -#define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS -#define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS -#define EXT4_IOC32_GETVERSION _IOR('f', 3, int) -#define EXT4_IOC32_SETVERSION _IOW('f', 4, int) -#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) -#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) -#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) -#ifdef CONFIG_JBD2_DEBUG -#define EXT4_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) -#endif -#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION -#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION - - -/* - * Mount options - */ -struct ext4_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 ext4_inode { - __le16 i_mode; /* File mode */ - __le16 i_uid; /* Low 16 bits of Owner Uid */ - __le32 i_size_lo; /* Size in bytes */ - __le32 i_atime; /* Access time */ - __le32 i_ctime; /* Inode Change 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_lo; /* Blocks count */ - __le32 i_flags; /* File flags */ - union { - struct { - __le32 l_i_version; - } linux1; - struct { - __u32 h_i_translator; - } hurd1; - struct { - __u32 m_i_reserved1; - } masix1; - } osd1; /* OS dependent 1 */ - __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ - __le32 i_generation; /* File version (for NFS) */ - __le32 i_file_acl_lo; /* File ACL */ - __le32 i_size_high; - __le32 i_obso_faddr; /* Obsoleted fragment address */ - union { - struct { - __le16 l_i_blocks_high; /* were l_i_reserved1 */ - __le16 l_i_file_acl_high; - __le16 l_i_uid_high; /* these 2 fields */ - __le16 l_i_gid_high; /* were reserved2[0] */ - __u32 l_i_reserved2; - } linux2; - struct { - __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ - __u16 h_i_mode_high; - __u16 h_i_uid_high; - __u16 h_i_gid_high; - __u32 h_i_author; - } hurd2; - struct { - __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ - __le16 m_i_file_acl_high; - __u32 m_i_reserved2[2]; - } masix2; - } osd2; /* OS dependent 2 */ - __le16 i_extra_isize; - __le16 i_pad1; - __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ - __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ - __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ - __le32 i_crtime; /* File Creation time */ - __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ - __le32 i_version_hi; /* high 32 bits for 64-bit version */ -}; - - -#define EXT4_EPOCH_BITS 2 -#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) -#define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) - -/* - * Extended fields will fit into an inode if the filesystem was formatted - * with large inodes (-I 256 or larger) and there are not currently any EAs - * consuming all of the available space. For new inodes we always reserve - * enough space for the kernel's known extended fields, but for inodes - * created with an old kernel this might not have been the case. None of - * the extended inode fields is critical for correct filesystem operation. - * This macro checks if a certain field fits in the inode. Note that - * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize - */ -#define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ - ((offsetof(typeof(*ext4_inode), field) + \ - sizeof((ext4_inode)->field)) \ - <= (EXT4_GOOD_OLD_INODE_SIZE + \ - (einode)->i_extra_isize)) \ - -static inline __le32 ext4_encode_extra_time(struct timespec *time) -{ - return cpu_to_le32((sizeof(time->tv_sec) > 4 ? - time->tv_sec >> 32 : 0) | - ((time->tv_nsec << 2) & EXT4_NSEC_MASK)); -} - -static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) -{ - if (sizeof(time->tv_sec) > 4) - time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) - << 32; - time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2; -} - -#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ -do { \ - (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ - if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ - (raw_inode)->xtime ## _extra = \ - ext4_encode_extra_time(&(inode)->xtime); \ -} while (0) - -#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ -do { \ - if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ - (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ - if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ - (raw_inode)->xtime ## _extra = \ - ext4_encode_extra_time(&(einode)->xtime); \ -} while (0) - -#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ -do { \ - (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ - if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ - ext4_decode_extra_time(&(inode)->xtime, \ - raw_inode->xtime ## _extra); \ -} while (0) - -#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ -do { \ - if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ - (einode)->xtime.tv_sec = \ - (signed)le32_to_cpu((raw_inode)->xtime); \ - if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ - ext4_decode_extra_time(&(einode)->xtime, \ - raw_inode->xtime ## _extra); \ -} while (0) - -#define i_disk_version osd1.linux1.l_i_version - -#if defined(__KERNEL__) || defined(__linux__) -#define i_reserved1 osd1.linux1.l_i_reserved1 -#define i_file_acl_high osd2.linux2.l_i_file_acl_high -#define i_blocks_high osd2.linux2.l_i_blocks_high -#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_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_file_acl_high osd2.masix2.m_i_file_acl_high -#define i_reserved2 osd2.masix2.m_i_reserved2 - -#endif /* defined(__KERNEL__) || defined(__linux__) */ - -/* - * File system states - */ -#define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ -#define EXT4_ERROR_FS 0x0002 /* Errors detected */ -#define EXT4_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 EXT4_MOUNT_CHECK 0x00001 /* Do mount-time checks */ -#define EXT4_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ -#define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ -#define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ -#define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ -#define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ -#define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ -#define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ -#define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ -#define EXT4_MOUNT_ABORT 0x00200 /* Fatal error detected */ -#define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ -#define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ -#define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ -#define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ -#define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ -#define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ -#define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ -#define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ -#define EXT4_MOUNT_RESERVATION 0x10000 /* Preallocation */ -#define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ -#define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */ -#define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ -#define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ -#define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ -#define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */ -#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ -#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ -#define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ -#define EXT4_MOUNT_MBALLOC 0x4000000 /* Buddy allocation support */ -/* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ -#ifndef _LINUX_EXT2_FS_H -#define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt -#define set_opt(o, opt) o |= EXT4_MOUNT_##opt -#define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ - EXT4_MOUNT_##opt) -#else -#define EXT2_MOUNT_NOLOAD EXT4_MOUNT_NOLOAD -#define EXT2_MOUNT_ABORT EXT4_MOUNT_ABORT -#define EXT2_MOUNT_DATA_FLAGS EXT4_MOUNT_DATA_FLAGS -#endif - -#define ext4_set_bit ext2_set_bit -#define ext4_set_bit_atomic ext2_set_bit_atomic -#define ext4_clear_bit ext2_clear_bit -#define ext4_clear_bit_atomic ext2_clear_bit_atomic -#define ext4_test_bit ext2_test_bit -#define ext4_find_first_zero_bit ext2_find_first_zero_bit -#define ext4_find_next_zero_bit ext2_find_next_zero_bit -#define ext4_find_next_bit ext2_find_next_bit - -/* - * Maximal mount counts between two filesystem checks - */ -#define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ -#define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ - -/* - * Behaviour when detecting errors - */ -#define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ -#define EXT4_ERRORS_RO 2 /* Remount fs read-only */ -#define EXT4_ERRORS_PANIC 3 /* Panic */ -#define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE - -/* - * Structure of the super block - */ -struct ext4_super_block { -/*00*/ __le32 s_inodes_count; /* Inodes count */ - __le32 s_blocks_count_lo; /* Blocks count */ - __le32 s_r_blocks_count_lo; /* Reserved blocks count */ - __le32 s_free_blocks_count_lo; /* 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_obso_log_frag_size; /* Obsoleted fragment size */ -/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ - __le32 s_obso_frags_per_group; /* Obsoleted 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 EXT4_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 EXT4_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 EXT4_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; - __le16 s_desc_size; /* size of group descriptor */ -/*100*/ __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)*/ - __u32 s_reserved[163]; /* Padding to the end of the block */ -}; - -#ifdef __KERNEL__ -static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb) -{ - return sb->s_fs_info; -} -static inline struct ext4_inode_info *EXT4_I(struct inode *inode) -{ - return container_of(inode, struct ext4_inode_info, vfs_inode); -} - -static inline struct timespec ext4_current_time(struct inode *inode) -{ - return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ? - current_fs_time(inode->i_sb) : CURRENT_TIME_SEC; -} - - -static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) -{ - return ino == EXT4_ROOT_INO || - ino == EXT4_JOURNAL_INO || - ino == EXT4_RESIZE_INO || - (ino >= EXT4_FIRST_INO(sb) && - ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); -} -#else -/* Assume that user mode programs are passing in an ext4fs superblock, not - * a kernel struct super_block. This will allow us to call the feature-test - * macros from user land. */ -#define EXT4_SB(sb) (sb) -#endif - -#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime - -/* - * Codes for operating systems - */ -#define EXT4_OS_LINUX 0 -#define EXT4_OS_HURD 1 -#define EXT4_OS_MASIX 2 -#define EXT4_OS_FREEBSD 3 -#define EXT4_OS_LITES 4 - -/* - * Revision levels - */ -#define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ -#define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ - -#define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV -#define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV - -#define EXT4_GOOD_OLD_INODE_SIZE 128 - -/* - * Feature set definitions - */ - -#define EXT4_HAS_COMPAT_FEATURE(sb,mask) \ - ( EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) -#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \ - ( EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) -#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ - ( EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) -#define EXT4_SET_COMPAT_FEATURE(sb,mask) \ - EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) -#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \ - EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) -#define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \ - EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) -#define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \ - EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) -#define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ - EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) -#define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \ - EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) - -#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 -#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 -#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 -#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 -#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 -#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 - -#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 -#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 -#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 -#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 -#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 -#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 -#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 - -#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 -#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 -#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ -#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ -#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 -#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ -#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 -#define EXT4_FEATURE_INCOMPAT_MMP 0x0100 -#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 - -#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR -#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ - EXT4_FEATURE_INCOMPAT_RECOVER| \ - EXT4_FEATURE_INCOMPAT_META_BG| \ - EXT4_FEATURE_INCOMPAT_EXTENTS| \ - EXT4_FEATURE_INCOMPAT_64BIT| \ - EXT4_FEATURE_INCOMPAT_FLEX_BG) -#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ - EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ - EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ - EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ - EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ - EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ - EXT4_FEATURE_RO_COMPAT_HUGE_FILE) - -/* - * Default values for user and/or group using reserved blocks - */ -#define EXT4_DEF_RESUID 0 -#define EXT4_DEF_RESGID 0 - -/* - * Default mount options - */ -#define EXT4_DEFM_DEBUG 0x0001 -#define EXT4_DEFM_BSDGROUPS 0x0002 -#define EXT4_DEFM_XATTR_USER 0x0004 -#define EXT4_DEFM_ACL 0x0008 -#define EXT4_DEFM_UID16 0x0010 -#define EXT4_DEFM_JMODE 0x0060 -#define EXT4_DEFM_JMODE_DATA 0x0020 -#define EXT4_DEFM_JMODE_ORDERED 0x0040 -#define EXT4_DEFM_JMODE_WBACK 0x0060 - -/* - * Structure of a directory entry - */ -#define EXT4_NAME_LEN 255 - -struct ext4_dir_entry { - __le32 inode; /* Inode number */ - __le16 rec_len; /* Directory entry length */ - __le16 name_len; /* Name length */ - char name[EXT4_NAME_LEN]; /* File name */ -}; - -/* - * The new version of the directory entry. Since EXT4 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 ext4_dir_entry_2 { - __le32 inode; /* Inode number */ - __le16 rec_len; /* Directory entry length */ - __u8 name_len; /* Name length */ - __u8 file_type; - char name[EXT4_NAME_LEN]; /* File name */ -}; - -/* - * Ext4 directory file types. Only the low 3 bits are used. The - * other bits are reserved for now. - */ -#define EXT4_FT_UNKNOWN 0 -#define EXT4_FT_REG_FILE 1 -#define EXT4_FT_DIR 2 -#define EXT4_FT_CHRDEV 3 -#define EXT4_FT_BLKDEV 4 -#define EXT4_FT_FIFO 5 -#define EXT4_FT_SOCK 6 -#define EXT4_FT_SYMLINK 7 - -#define EXT4_FT_MAX 8 - -/* - * EXT4_DIR_PAD defines the directory entries boundaries - * - * NOTE: It must be a multiple of 4 - */ -#define EXT4_DIR_PAD 4 -#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) -#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ - ~EXT4_DIR_ROUND) -#define EXT4_MAX_REC_LEN ((1<<16)-1) - -static inline unsigned ext4_rec_len_from_disk(__le16 dlen) -{ - unsigned len = le16_to_cpu(dlen); - - if (len == EXT4_MAX_REC_LEN) - return 1 << 16; - return len; -} - -static inline __le16 ext4_rec_len_to_disk(unsigned len) -{ - if (len == (1 << 16)) - return cpu_to_le16(EXT4_MAX_REC_LEN); - else if (len > (1 << 16)) - BUG(); - return cpu_to_le16(len); -} - -/* - * Hash Tree Directory indexing - * (c) Daniel Phillips, 2001 - */ - -#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \ - EXT4_FEATURE_COMPAT_DIR_INDEX) && \ - (EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) -#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX) -#define EXT4_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 - -#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 EXT4_HTREE_EOF 0x7fffffff - -/* - * Control parameters used by ext4_htree_next_block - */ -#define HASH_NB_ALWAYS 1 - - -/* - * Describe an inode's exact location on disk and in memory - */ -struct ext4_iloc -{ - struct buffer_head *bh; - unsigned long offset; - ext4_group_t block_group; -}; - -static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) -{ - return (struct ext4_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 ext4_fsblk_t -ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) -{ - return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + - le32_to_cpu(EXT4_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 - -void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr, - unsigned long *blockgrpp, ext4_grpblk_t *offsetp); - -/* - * Function prototypes - */ - -/* - * Ok, these declarations are also in <linux/kernel.h> but none of the - * ext4 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 unsigned int ext4_block_group(struct super_block *sb, - ext4_fsblk_t blocknr); -extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, - ext4_fsblk_t blocknr); -extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); -extern unsigned long ext4_bg_num_gdb(struct super_block *sb, - ext4_group_t group); -extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode, - ext4_fsblk_t goal, int *errp); -extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode, - ext4_fsblk_t goal, unsigned long *count, int *errp); -extern ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode, - ext4_fsblk_t goal, unsigned long *count, int *errp); -extern void ext4_free_blocks (handle_t *handle, struct inode *inode, - ext4_fsblk_t block, unsigned long count, int metadata); -extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb, - ext4_fsblk_t block, unsigned long count, - unsigned long *pdquot_freed_blocks); -extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *); -extern void ext4_check_blocks_bitmap (struct super_block *); -extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, - ext4_group_t block_group, - struct buffer_head ** bh); -extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); -extern void ext4_init_block_alloc_info(struct inode *); -extern void ext4_rsv_window_add(struct super_block *sb, struct ext4_reserve_window_node *rsv); - -/* dir.c */ -extern int ext4_check_dir_entry(const char *, struct inode *, - struct ext4_dir_entry_2 *, - struct buffer_head *, unsigned long); -extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, - __u32 minor_hash, - struct ext4_dir_entry_2 *dirent); -extern void ext4_htree_free_dir_info(struct dir_private_info *p); - -/* fsync.c */ -extern int ext4_sync_file (struct file *, struct dentry *, int); - -/* hash.c */ -extern int ext4fs_dirhash(const char *name, int len, struct - dx_hash_info *hinfo); - -/* ialloc.c */ -extern struct inode * ext4_new_inode (handle_t *, struct inode *, int); -extern void ext4_free_inode (handle_t *, struct inode *); -extern struct inode * ext4_orphan_get (struct super_block *, unsigned long); -extern unsigned long ext4_count_free_inodes (struct super_block *); -extern unsigned long ext4_count_dirs (struct super_block *); -extern void ext4_check_inodes_bitmap (struct super_block *); -extern unsigned long ext4_count_free (struct buffer_head *, unsigned); - -/* mballoc.c */ -extern long ext4_mb_stats; -extern long ext4_mb_max_to_scan; -extern int ext4_mb_init(struct super_block *, int); -extern int ext4_mb_release(struct super_block *); -extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, - struct ext4_allocation_request *, int *); -extern int ext4_mb_reserve_blocks(struct super_block *, int); -extern void ext4_mb_discard_inode_preallocations(struct inode *); -extern int __init init_ext4_mballoc(void); -extern void exit_ext4_mballoc(void); -extern void ext4_mb_free_blocks(handle_t *, struct inode *, - unsigned long, unsigned long, int, unsigned long *); - - -/* inode.c */ -int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, - struct buffer_head *bh, ext4_fsblk_t blocknr); -struct buffer_head *ext4_getblk(handle_t *, struct inode *, - ext4_lblk_t, int, int *); -struct buffer_head *ext4_bread(handle_t *, struct inode *, - ext4_lblk_t, int, int *); -int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, - ext4_lblk_t iblock, unsigned long maxblocks, - struct buffer_head *bh_result, - int create, int extend_disksize); - -extern struct inode *ext4_iget(struct super_block *, unsigned long); -extern int ext4_write_inode (struct inode *, int); -extern int ext4_setattr (struct dentry *, struct iattr *); -extern void ext4_delete_inode (struct inode *); -extern int ext4_sync_inode (handle_t *, struct inode *); -extern void ext4_discard_reservation (struct inode *); -extern void ext4_dirty_inode(struct inode *); -extern int ext4_change_inode_journal_flag(struct inode *, int); -extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); -extern void ext4_truncate (struct inode *); -extern void ext4_set_inode_flags(struct inode *); -extern void ext4_get_inode_flags(struct ext4_inode_info *); -extern void ext4_set_aops(struct inode *inode); -extern int ext4_writepage_trans_blocks(struct inode *); -extern int ext4_block_truncate_page(handle_t *handle, struct page *page, - struct address_space *mapping, loff_t from); - -/* ioctl.c */ -extern int ext4_ioctl (struct inode *, struct file *, unsigned int, - unsigned long); -extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long); - -/* migrate.c */ -extern int ext4_ext_migrate(struct inode *, struct file *, unsigned int, - unsigned long); -/* namei.c */ -extern int ext4_orphan_add(handle_t *, struct inode *); -extern int ext4_orphan_del(handle_t *, struct inode *); -extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, - __u32 start_minor_hash, __u32 *next_hash); - -/* resize.c */ -extern int ext4_group_add(struct super_block *sb, - struct ext4_new_group_data *input); -extern int ext4_group_extend(struct super_block *sb, - struct ext4_super_block *es, - ext4_fsblk_t n_blocks_count); - -/* super.c */ -extern void ext4_error (struct super_block *, const char *, const char *, ...) - __attribute__ ((format (printf, 3, 4))); -extern void __ext4_std_error (struct super_block *, const char *, int); -extern void ext4_abort (struct super_block *, const char *, const char *, ...) - __attribute__ ((format (printf, 3, 4))); -extern void ext4_warning (struct super_block *, const char *, const char *, ...) - __attribute__ ((format (printf, 3, 4))); -extern void ext4_update_dynamic_rev (struct super_block *sb); -extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, - __u32 compat); -extern int ext4_update_rocompat_feature(handle_t *handle, - struct super_block *sb, __u32 rocompat); -extern int ext4_update_incompat_feature(handle_t *handle, - struct super_block *sb, __u32 incompat); -extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, - struct ext4_group_desc *bg); -extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, - struct ext4_group_desc *bg); -extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, - struct ext4_group_desc *bg); -extern void ext4_block_bitmap_set(struct super_block *sb, - struct ext4_group_desc *bg, ext4_fsblk_t blk); -extern void ext4_inode_bitmap_set(struct super_block *sb, - struct ext4_group_desc *bg, ext4_fsblk_t blk); -extern void ext4_inode_table_set(struct super_block *sb, - struct ext4_group_desc *bg, ext4_fsblk_t blk); - -static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) -{ - return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | - le32_to_cpu(es->s_blocks_count_lo); -} - -static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) -{ - return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | - le32_to_cpu(es->s_r_blocks_count_lo); -} - -static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) -{ - return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | - le32_to_cpu(es->s_free_blocks_count_lo); -} - -static inline void ext4_blocks_count_set(struct ext4_super_block *es, - ext4_fsblk_t blk) -{ - es->s_blocks_count_lo = cpu_to_le32((u32)blk); - es->s_blocks_count_hi = cpu_to_le32(blk >> 32); -} - -static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, - ext4_fsblk_t blk) -{ - es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); - es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); -} - -static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, - ext4_fsblk_t blk) -{ - es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); - es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); -} - -static inline loff_t ext4_isize(struct ext4_inode *raw_inode) -{ - return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | - le32_to_cpu(raw_inode->i_size_lo); -} - -static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) -{ - raw_inode->i_size_lo = cpu_to_le32(i_size); - raw_inode->i_size_high = cpu_to_le32(i_size >> 32); -} - -static inline -struct ext4_group_info *ext4_get_group_info(struct super_block *sb, - ext4_group_t group) -{ - struct ext4_group_info ***grp_info; - long indexv, indexh; - grp_info = EXT4_SB(sb)->s_group_info; - indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); - indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); - return grp_info[indexv][indexh]; -} - - -#define ext4_std_error(sb, errno) \ -do { \ - if ((errno)) \ - __ext4_std_error((sb), __FUNCTION__, (errno)); \ -} while (0) - -/* - * Inodes and files operations - */ - -/* dir.c */ -extern const struct file_operations ext4_dir_operations; - -/* file.c */ -extern const struct inode_operations ext4_file_inode_operations; -extern const struct file_operations ext4_file_operations; - -/* namei.c */ -extern const struct inode_operations ext4_dir_inode_operations; -extern const struct inode_operations ext4_special_inode_operations; - -/* symlink.c */ -extern const struct inode_operations ext4_symlink_inode_operations; -extern const struct inode_operations ext4_fast_symlink_inode_operations; - -/* extents.c */ -extern int ext4_ext_tree_init(handle_t *handle, struct inode *); -extern int ext4_ext_writepage_trans_blocks(struct inode *, int); -extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, - ext4_lblk_t iblock, - unsigned long max_blocks, struct buffer_head *bh_result, - int create, int extend_disksize); -extern void ext4_ext_truncate(struct inode *, struct page *); -extern void ext4_ext_init(struct super_block *); -extern void ext4_ext_release(struct super_block *); -extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset, - loff_t len); -extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, - sector_t block, unsigned long max_blocks, - struct buffer_head *bh, int create, - int extend_disksize); -#endif /* __KERNEL__ */ - -#endif /* _LINUX_EXT4_FS_H */ diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h deleted file mode 100644 index 1285c583b2d..00000000000 --- a/include/linux/ext4_fs_extents.h +++ /dev/null @@ -1,232 +0,0 @@ -/* - * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com - * Written by Alex Tomas <alex@clusterfs.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public Licens - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- - */ - -#ifndef _LINUX_EXT4_EXTENTS -#define _LINUX_EXT4_EXTENTS - -#include <linux/ext4_fs.h> - -/* - * With AGGRESSIVE_TEST defined, the capacity of index/leaf blocks - * becomes very small, so index split, in-depth growing and - * other hard changes happen much more often. - * This is for debug purposes only. - */ -#define AGGRESSIVE_TEST_ - -/* - * With EXTENTS_STATS defined, the number of blocks and extents - * are collected in the truncate path. They'll be shown at - * umount time. - */ -#define EXTENTS_STATS__ - -/* - * If CHECK_BINSEARCH is defined, then the results of the binary search - * will also be checked by linear search. - */ -#define CHECK_BINSEARCH__ - -/* - * If EXT_DEBUG is defined you can use the 'extdebug' mount option - * to get lots of info about what's going on. - */ -#define EXT_DEBUG__ -#ifdef EXT_DEBUG -#define ext_debug(a...) printk(a) -#else -#define ext_debug(a...) -#endif - -/* - * If EXT_STATS is defined then stats numbers are collected. - * These number will be displayed at umount time. - */ -#define EXT_STATS_ - - -/* - * ext4_inode has i_block array (60 bytes total). - * The first 12 bytes store ext4_extent_header; - * the remainder stores an array of ext4_extent. - */ - -/* - * This is the extent on-disk structure. - * It's used at the bottom of the tree. - */ -struct ext4_extent { - __le32 ee_block; /* first logical block extent covers */ - __le16 ee_len; /* number of blocks covered by extent */ - __le16 ee_start_hi; /* high 16 bits of physical block */ - __le32 ee_start_lo; /* low 32 bits of physical block */ -}; - -/* - * This is index on-disk structure. - * It's used at all the levels except the bottom. - */ -struct ext4_extent_idx { - __le32 ei_block; /* index covers logical blocks from 'block' */ - __le32 ei_leaf_lo; /* pointer to the physical block of the next * - * level. leaf or next index could be there */ - __le16 ei_leaf_hi; /* high 16 bits of physical block */ - __u16 ei_unused; -}; - -/* - * Each block (leaves and indexes), even inode-stored has header. - */ -struct ext4_extent_header { - __le16 eh_magic; /* probably will support different formats */ - __le16 eh_entries; /* number of valid entries */ - __le16 eh_max; /* capacity of store in entries */ - __le16 eh_depth; /* has tree real underlying blocks? */ - __le32 eh_generation; /* generation of the tree */ -}; - -#define EXT4_EXT_MAGIC cpu_to_le16(0xf30a) - -/* - * Array of ext4_ext_path contains path to some extent. - * Creation/lookup routines use it for traversal/splitting/etc. - * Truncate uses it to simulate recursive walking. - */ -struct ext4_ext_path { - ext4_fsblk_t p_block; - __u16 p_depth; - struct ext4_extent *p_ext; - struct ext4_extent_idx *p_idx; - struct ext4_extent_header *p_hdr; - struct buffer_head *p_bh; -}; - -/* - * structure for external API - */ - -#define EXT4_EXT_CACHE_NO 0 -#define EXT4_EXT_CACHE_GAP 1 -#define EXT4_EXT_CACHE_EXTENT 2 - - -#define EXT_MAX_BLOCK 0xffffffff - -/* - * EXT_INIT_MAX_LEN is the maximum number of blocks we can have in an - * initialized extent. This is 2^15 and not (2^16 - 1), since we use the - * MSB of ee_len field in the extent datastructure to signify if this - * particular extent is an initialized extent or an uninitialized (i.e. - * preallocated). - * EXT_UNINIT_MAX_LEN is the maximum number of blocks we can have in an - * uninitialized extent. - * If ee_len is <= 0x8000, it is an initialized extent. Otherwise, it is an - * uninitialized one. In other words, if MSB of ee_len is set, it is an - * uninitialized extent with only one special scenario when ee_len = 0x8000. - * In this case we can not have an uninitialized extent of zero length and - * thus we make it as a special case of initialized extent with 0x8000 length. - * This way we get better extent-to-group alignment for initialized extents. - * Hence, the maximum number of blocks we can have in an *initialized* - * extent is 2^15 (32768) and in an *uninitialized* extent is 2^15-1 (32767). - */ -#define EXT_INIT_MAX_LEN (1UL << 15) -#define EXT_UNINIT_MAX_LEN (EXT_INIT_MAX_LEN - 1) - - -#define EXT_FIRST_EXTENT(__hdr__) \ - ((struct ext4_extent *) (((char *) (__hdr__)) + \ - sizeof(struct ext4_extent_header))) -#define EXT_FIRST_INDEX(__hdr__) \ - ((struct ext4_extent_idx *) (((char *) (__hdr__)) + \ - sizeof(struct ext4_extent_header))) -#define EXT_HAS_FREE_INDEX(__path__) \ - (le16_to_cpu((__path__)->p_hdr->eh_entries) \ - < le16_to_cpu((__path__)->p_hdr->eh_max)) -#define EXT_LAST_EXTENT(__hdr__) \ - (EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1) -#define EXT_LAST_INDEX(__hdr__) \ - (EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1) -#define EXT_MAX_EXTENT(__hdr__) \ - (EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1) -#define EXT_MAX_INDEX(__hdr__) \ - (EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1) - -static inline struct ext4_extent_header *ext_inode_hdr(struct inode *inode) -{ - return (struct ext4_extent_header *) EXT4_I(inode)->i_data; -} - -static inline struct ext4_extent_header *ext_block_hdr(struct buffer_head *bh) -{ - return (struct ext4_extent_header *) bh->b_data; -} - -static inline unsigned short ext_depth(struct inode *inode) -{ - return le16_to_cpu(ext_inode_hdr(inode)->eh_depth); -} - -static inline void ext4_ext_tree_changed(struct inode *inode) -{ - EXT4_I(inode)->i_ext_generation++; -} - -static inline void -ext4_ext_invalidate_cache(struct inode *inode) -{ - EXT4_I(inode)->i_cached_extent.ec_type = EXT4_EXT_CACHE_NO; -} - -static inline void ext4_ext_mark_uninitialized(struct ext4_extent *ext) -{ - /* We can not have an uninitialized extent of zero length! */ - BUG_ON((le16_to_cpu(ext->ee_len) & ~EXT_INIT_MAX_LEN) == 0); - ext->ee_len |= cpu_to_le16(EXT_INIT_MAX_LEN); -} - -static inline int ext4_ext_is_uninitialized(struct ext4_extent *ext) -{ - /* Extent with ee_len of 0x8000 is treated as an initialized extent */ - return (le16_to_cpu(ext->ee_len) > EXT_INIT_MAX_LEN); -} - -static inline int ext4_ext_get_actual_len(struct ext4_extent *ext) -{ - return (le16_to_cpu(ext->ee_len) <= EXT_INIT_MAX_LEN ? - le16_to_cpu(ext->ee_len) : - (le16_to_cpu(ext->ee_len) - EXT_INIT_MAX_LEN)); -} - -extern ext4_fsblk_t idx_pblock(struct ext4_extent_idx *); -extern void ext4_ext_store_pblock(struct ext4_extent *, ext4_fsblk_t); -extern int ext4_extent_tree_init(handle_t *, struct inode *); -extern int ext4_ext_calc_credits_for_insert(struct inode *, struct ext4_ext_path *); -extern int ext4_ext_try_to_merge(struct inode *inode, - struct ext4_ext_path *path, - struct ext4_extent *); -extern unsigned int ext4_ext_check_overlap(struct inode *, struct ext4_extent *, struct ext4_ext_path *); -extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *); -extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t, - struct ext4_ext_path *); -extern int ext4_ext_search_left(struct inode *, struct ext4_ext_path *, - ext4_lblk_t *, ext4_fsblk_t *); -extern int ext4_ext_search_right(struct inode *, struct ext4_ext_path *, - ext4_lblk_t *, ext4_fsblk_t *); -extern void ext4_ext_drop_refs(struct ext4_ext_path *); -#endif /* _LINUX_EXT4_EXTENTS */ - diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h deleted file mode 100644 index d5508d3cf29..00000000000 --- a/include/linux/ext4_fs_i.h +++ /dev/null @@ -1,167 +0,0 @@ -/* - * linux/include/linux/ext4_fs_i.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_i.h - * - * Copyright (C) 1991, 1992 Linus Torvalds - */ - -#ifndef _LINUX_EXT4_FS_I -#define _LINUX_EXT4_FS_I - -#include <linux/rwsem.h> -#include <linux/rbtree.h> -#include <linux/seqlock.h> -#include <linux/mutex.h> - -/* data type for block offset of block group */ -typedef int ext4_grpblk_t; - -/* data type for filesystem-wide blocks number */ -typedef unsigned long long ext4_fsblk_t; - -/* data type for file logical block number */ -typedef __u32 ext4_lblk_t; - -/* data type for block group number */ -typedef unsigned long ext4_group_t; - -struct ext4_reserve_window { - ext4_fsblk_t _rsv_start; /* First byte reserved */ - ext4_fsblk_t _rsv_end; /* Last byte reserved or 0 */ -}; - -struct ext4_reserve_window_node { - struct rb_node rsv_node; - __u32 rsv_goal_size; - __u32 rsv_alloc_hit; - struct ext4_reserve_window rsv_window; -}; - -struct ext4_block_alloc_info { - /* information about reservation window */ - struct ext4_reserve_window_node rsv_window_node; - /* - * was i_next_alloc_block in ext4_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. - */ - ext4_lblk_t last_alloc_logical_block; - /* - * Was i_next_alloc_goal in ext4_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. - */ - ext4_fsblk_t last_alloc_physical_block; -}; - -#define rsv_start rsv_window._rsv_start -#define rsv_end rsv_window._rsv_end - -/* - * storage for cached extent - */ -struct ext4_ext_cache { - ext4_fsblk_t ec_start; - ext4_lblk_t ec_block; - __u32 ec_len; /* must be 32bit to return holes */ - __u32 ec_type; -}; - -/* - * third extended file system inode data in memory - */ -struct ext4_inode_info { - __le32 i_data[15]; /* unconverted */ - __u32 i_flags; - ext4_fsblk_t i_file_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. - */ - ext4_group_t i_block_group; - __u32 i_state; /* Dynamic state flags for ext4 */ - - /* block reservation info */ - struct ext4_block_alloc_info *i_block_alloc_info; - - ext4_lblk_t i_dir_start_lookup; -#ifdef CONFIG_EXT4DEV_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 -#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL - struct posix_acl *i_acl; - struct posix_acl *i_default_acl; -#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 ext4_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 ext4_get_block (growth) and ext4_truncate (shrinkth). - */ - loff_t i_disksize; - - /* on-disk additional length */ - __u16 i_extra_isize; - - /* - * i_data_sem is for serialising ext4_truncate() against - * ext4_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 - * ext4 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 i_data_sem. - */ - struct rw_semaphore i_data_sem; - struct inode vfs_inode; - - unsigned long i_ext_generation; - struct ext4_ext_cache i_cached_extent; - /* - * File creation time. Its function is same as that of - * struct timespec i_{a,c,m}time in the generic inode. - */ - struct timespec i_crtime; - - /* mballoc */ - struct list_head i_prealloc_list; - spinlock_t i_prealloc_lock; -}; - -#endif /* _LINUX_EXT4_FS_I */ diff --git a/include/linux/ext4_fs_sb.h b/include/linux/ext4_fs_sb.h deleted file mode 100644 index abaae2c8ccc..00000000000 --- a/include/linux/ext4_fs_sb.h +++ /dev/null @@ -1,148 +0,0 @@ -/* - * linux/include/linux/ext4_fs_sb.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_sb.h - * - * Copyright (C) 1991, 1992 Linus Torvalds - */ - -#ifndef _LINUX_EXT4_FS_SB -#define _LINUX_EXT4_FS_SB - -#ifdef __KERNEL__ -#include <linux/timer.h> -#include <linux/wait.h> -#include <linux/blockgroup_lock.h> -#include <linux/percpu_counter.h> -#endif -#include <linux/rbtree.h> - -/* - * third extended-fs super-block data in memory - */ -struct ext4_sb_info { - unsigned long s_desc_size; /* Size of a group descriptor in bytes */ - unsigned long s_inodes_per_block;/* Number of inodes per block */ - 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 */ - ext4_group_t 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 */ - loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ - struct buffer_head * s_sbh; /* Buffer containing the super block */ - struct ext4_super_block * s_es; /* Pointer to the super block in the buffer */ - struct buffer_head ** s_group_desc; - unsigned long s_mount_opt; - ext4_fsblk_t s_sb_block; - uid_t s_resuid; - gid_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; - 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 ext4_reserve_window_node s_rsv_window_head; - - /* Journaling */ - struct inode * s_journal_inode; - struct journal_s * s_journal; - struct list_head s_orphan; - unsigned long s_commit_interval; - struct block_device *journal_bdev; -#ifdef CONFIG_JBD2_DEBUG - struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */ - wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */ -#endif -#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 - unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ - -#ifdef EXTENTS_STATS - /* ext4 extents stats */ - unsigned long s_ext_min; - unsigned long s_ext_max; - unsigned long s_depth_max; - spinlock_t s_ext_stats_lock; - unsigned long s_ext_blocks; - unsigned long s_ext_extents; -#endif - - /* for buddy allocator */ - struct ext4_group_info ***s_group_info; - struct inode *s_buddy_cache; - long s_blocks_reserved; - spinlock_t s_reserve_lock; - struct list_head s_active_transaction; - struct list_head s_closed_transaction; - struct list_head s_committed_transaction; - spinlock_t s_md_lock; - tid_t s_last_transaction; - unsigned short *s_mb_offsets, *s_mb_maxs; - - /* tunables */ - unsigned long s_stripe; - unsigned long s_mb_stream_request; - unsigned long s_mb_max_to_scan; - unsigned long s_mb_min_to_scan; - unsigned long s_mb_stats; - unsigned long s_mb_order2_reqs; - unsigned long s_mb_group_prealloc; - /* where last allocation was done - for stream allocation */ - unsigned long s_mb_last_group; - unsigned long s_mb_last_start; - - /* history to debug policy */ - struct ext4_mb_history *s_mb_history; - int s_mb_history_cur; - int s_mb_history_max; - int s_mb_history_num; - struct proc_dir_entry *s_mb_proc; - spinlock_t s_mb_history_lock; - int s_mb_history_filter; - - /* stats for buddy allocator */ - spinlock_t s_mb_pa_lock; - atomic_t s_bal_reqs; /* number of reqs with len > 1 */ - atomic_t s_bal_success; /* we found long enough chunks */ - atomic_t s_bal_allocated; /* in blocks */ - atomic_t s_bal_ex_scanned; /* total extents scanned */ - atomic_t s_bal_goals; /* goal hits */ - atomic_t s_bal_breaks; /* too long searches */ - atomic_t s_bal_2orders; /* 2^order hits */ - spinlock_t s_bal_lock; - unsigned long s_mb_buddies_generated; - unsigned long long s_mb_generation_time; - atomic_t s_mb_lost_chunks; - atomic_t s_mb_preallocated; - atomic_t s_mb_discarded; - - /* locality groups */ - struct ext4_locality_group *s_locality_groups; -}; - -#endif /* _LINUX_EXT4_FS_SB */ diff --git a/include/linux/ext4_jbd2.h b/include/linux/ext4_jbd2.h deleted file mode 100644 index 38c71d3c8db..00000000000 --- a/include/linux/ext4_jbd2.h +++ /dev/null @@ -1,231 +0,0 @@ -/* - * linux/include/linux/ext4_jbd2.h - * - * Written by Stephen C. Tweedie <sct@redhat.com>, 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. - * - * Ext4-specific journaling extensions. - */ - -#ifndef _LINUX_EXT4_JBD2_H -#define _LINUX_EXT4_JBD2_H - -#include <linux/fs.h> -#include <linux/jbd2.h> -#include <linux/ext4_fs.h> - -#define EXT4_JOURNAL(inode) (EXT4_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. - * - * For extents-enabled fs we may have to allocate and modify up to - * 5 levels of tree + root which are stored in the inode. */ - -#define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \ - (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS) \ - || test_opt(sb, EXTENTS) ? 27U : 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 EXT4_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 EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \ - EXT4_XATTR_TRANS_BLOCKS - 2 + \ - 2*EXT4_QUOTA_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 EXT4_DELETE_TRANS_BLOCKS(sb) (2 * EXT4_DATA_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 EXT4_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 EXT4_RESERVE_TRANS_BLOCKS 12U - -#define EXT4_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 EXT4_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 EXT4_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\ - (EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)+3+DQUOT_INIT_REWRITE) : 0) -#define EXT4_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\ - (EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)+3+DQUOT_DEL_REWRITE) : 0) -#else -#define EXT4_QUOTA_TRANS_BLOCKS(sb) 0 -#define EXT4_QUOTA_INIT_BLOCKS(sb) 0 -#define EXT4_QUOTA_DEL_BLOCKS(sb) 0 -#endif - -int -ext4_mark_iloc_dirty(handle_t *handle, - struct inode *inode, - struct ext4_iloc *iloc); - -/* - * On success, We end up with an outstanding reference count against - * iloc->bh. This _must_ be cleaned up later. - */ - -int ext4_reserve_inode_write(handle_t *handle, struct inode *inode, - struct ext4_iloc *iloc); - -int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode); - -/* - * Wrapper functions with which ext4 calls into JBD. The intent here is - * to allow these to be turned into appropriate stubs so ext4 can control - * ext2 filesystems, so ext2+ext4 systems only nee one fs. This work hasn't - * been done yet. - */ - -static inline void ext4_journal_release_buffer(handle_t *handle, - struct buffer_head *bh) -{ - jbd2_journal_release_buffer(handle, bh); -} - -void ext4_journal_abort_handle(const char *caller, const char *err_fn, - struct buffer_head *bh, handle_t *handle, int err); - -int __ext4_journal_get_undo_access(const char *where, handle_t *handle, - struct buffer_head *bh); - -int __ext4_journal_get_write_access(const char *where, handle_t *handle, - struct buffer_head *bh); - -int __ext4_journal_forget(const char *where, handle_t *handle, - struct buffer_head *bh); - -int __ext4_journal_revoke(const char *where, handle_t *handle, - ext4_fsblk_t blocknr, struct buffer_head *bh); - -int __ext4_journal_get_create_access(const char *where, - handle_t *handle, struct buffer_head *bh); - -int __ext4_journal_dirty_metadata(const char *where, - handle_t *handle, struct buffer_head *bh); - -#define ext4_journal_get_undo_access(handle, bh) \ - __ext4_journal_get_undo_access(__FUNCTION__, (handle), (bh)) -#define ext4_journal_get_write_access(handle, bh) \ - __ext4_journal_get_write_access(__FUNCTION__, (handle), (bh)) -#define ext4_journal_revoke(handle, blocknr, bh) \ - __ext4_journal_revoke(__FUNCTION__, (handle), (blocknr), (bh)) -#define ext4_journal_get_create_access(handle, bh) \ - __ext4_journal_get_create_access(__FUNCTION__, (handle), (bh)) -#define ext4_journal_dirty_metadata(handle, bh) \ - __ext4_journal_dirty_metadata(__FUNCTION__, (handle), (bh)) -#define ext4_journal_forget(handle, bh) \ - __ext4_journal_forget(__FUNCTION__, (handle), (bh)) - -int ext4_journal_dirty_data(handle_t *handle, struct buffer_head *bh); - -handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks); -int __ext4_journal_stop(const char *where, handle_t *handle); - -static inline handle_t *ext4_journal_start(struct inode *inode, int nblocks) -{ - return ext4_journal_start_sb(inode->i_sb, nblocks); -} - -#define ext4_journal_stop(handle) \ - __ext4_journal_stop(__FUNCTION__, (handle)) - -static inline handle_t *ext4_journal_current_handle(void) -{ - return journal_current_handle(); -} - -static inline int ext4_journal_extend(handle_t *handle, int nblocks) -{ - return jbd2_journal_extend(handle, nblocks); -} - -static inline int ext4_journal_restart(handle_t *handle, int nblocks) -{ - return jbd2_journal_restart(handle, nblocks); -} - -static inline int ext4_journal_blocks_per_page(struct inode *inode) -{ - return jbd2_journal_blocks_per_page(inode); -} - -static inline int ext4_journal_force_commit(journal_t *journal) -{ - return jbd2_journal_force_commit(journal); -} - -/* super.c */ -int ext4_force_commit(struct super_block *sb); - -static inline int ext4_should_journal_data(struct inode *inode) -{ - if (!S_ISREG(inode->i_mode)) - return 1; - if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) - return 1; - if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) - return 1; - return 0; -} - -static inline int ext4_should_order_data(struct inode *inode) -{ - if (!S_ISREG(inode->i_mode)) - return 0; - if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) - return 0; - if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) - return 1; - return 0; -} - -static inline int ext4_should_writeback_data(struct inode *inode) -{ - if (!S_ISREG(inode->i_mode)) - return 0; - if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) - return 0; - if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) - return 1; - return 0; -} - -#endif /* _LINUX_EXT4_JBD2_H */ |