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fs/ext4/ext4.h
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/* |
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* ext4.h |
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* * 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 */ |
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#ifndef _EXT4_H #define _EXT4_H |
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#include <linux/types.h> |
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#include <linux/blkdev.h> |
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#include <linux/magic.h> |
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#include <linux/jbd2.h> |
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#include <linux/quota.h> |
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#include <linux/rwsem.h> #include <linux/rbtree.h> #include <linux/seqlock.h> #include <linux/mutex.h> |
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#include <linux/timer.h> #include <linux/wait.h> #include <linux/blockgroup_lock.h> #include <linux/percpu_counter.h> |
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#ifdef __KERNEL__ #include <linux/compat.h> #endif |
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|
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/* |
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* The fourth extended filesystem constants/structures |
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*/ /* |
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* Define EXT4FS_DEBUG to produce debug messages |
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*/ |
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#undef EXT4FS_DEBUG |
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/* |
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* Debug code */ |
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#ifdef EXT4FS_DEBUG #define ext4_debug(f, a...) \ |
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do { \ |
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printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ |
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__FILE__, __LINE__, __func__); \ |
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printk(KERN_DEBUG f, ## a); \ |
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} while (0) #else |
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#define ext4_debug(f, a...) do {} while (0) |
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#endif |
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#define EXT4_ERROR_INODE(inode, fmt, a...) \ |
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ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) #define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \ ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a) |
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#define EXT4_ERROR_FILE(file, fmt, a...) \ |
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ext4_error_file(__func__, __LINE__, (file), (fmt), ## a) |
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/* 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 int ext4_group_t; |
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/* |
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* Flags used in mballoc's allocation_context flags field. |
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* * Also used to show what's going on for debugging purposes when the * flag field is exported via the traceport interface */ |
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|
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/* prefer goal again. length */ |
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#define EXT4_MB_HINT_MERGE 0x0001 |
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/* blocks already reserved */ |
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#define EXT4_MB_HINT_RESERVED 0x0002 |
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/* metadata is being allocated */ |
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#define EXT4_MB_HINT_METADATA 0x0004 |
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/* first blocks in the file */ |
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#define EXT4_MB_HINT_FIRST 0x0008 |
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/* search for the best chunk */ |
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#define EXT4_MB_HINT_BEST 0x0010 |
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/* data is being allocated */ |
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#define EXT4_MB_HINT_DATA 0x0020 |
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/* don't preallocate (for tails) */ |
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#define EXT4_MB_HINT_NOPREALLOC 0x0040 |
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/* allocate for locality group */ |
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#define EXT4_MB_HINT_GROUP_ALLOC 0x0080 |
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/* allocate goal blocks or none */ |
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#define EXT4_MB_HINT_GOAL_ONLY 0x0100 |
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/* goal is meaningful */ |
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#define EXT4_MB_HINT_TRY_GOAL 0x0200 |
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/* blocks already pre-reserved by delayed allocation */ |
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#define EXT4_MB_DELALLOC_RESERVED 0x0400 |
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/* We are doing stream allocation */ #define EXT4_MB_STREAM_ALLOC 0x0800 |
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struct ext4_allocation_request { /* target inode for block we're allocating */ struct inode *inode; |
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/* how many blocks we want to allocate */ unsigned int len; |
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/* logical block in target inode */ ext4_lblk_t logical; |
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/* the closest logical allocated block to the left */ ext4_lblk_t lleft; |
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/* the closest logical allocated block to the right */ ext4_lblk_t lright; |
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/* phys. target (a hint) */ ext4_fsblk_t goal; /* phys. block for the closest logical allocated block to the left */ ext4_fsblk_t pleft; /* phys. block for the closest logical allocated block to the right */ |
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ext4_fsblk_t pright; |
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/* flags. see above EXT4_MB_HINT_* */ |
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unsigned int flags; |
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}; |
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/* |
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* Logical to physical block mapping, used by ext4_map_blocks() * * This structure is used to pass requests into ext4_map_blocks() as * well as to store the information returned by ext4_map_blocks(). It * takes less room on the stack than a struct buffer_head. */ #define EXT4_MAP_NEW (1 << BH_New) #define EXT4_MAP_MAPPED (1 << BH_Mapped) #define EXT4_MAP_UNWRITTEN (1 << BH_Unwritten) #define EXT4_MAP_BOUNDARY (1 << BH_Boundary) #define EXT4_MAP_UNINIT (1 << BH_Uninit) #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY |\ EXT4_MAP_UNINIT) struct ext4_map_blocks { ext4_fsblk_t m_pblk; ext4_lblk_t m_lblk; unsigned int m_len; unsigned int m_flags; }; /* |
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* For delayed allocation tracking */ struct mpage_da_data { struct inode *inode; sector_t b_blocknr; /* start block number of extent */ size_t b_size; /* size of extent */ unsigned long b_state; /* state of the extent */ unsigned long first_page, next_page; /* extent of pages */ struct writeback_control *wbc; int io_done; int pages_written; int retval; }; |
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#define EXT4_IO_UNWRITTEN 0x1 |
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typedef struct ext4_io_end { |
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struct list_head list; /* per-file finished IO list */ |
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struct inode *inode; /* file being written to */ |
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unsigned int flag; /* unwritten or not */ |
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struct page *page; /* page struct for buffer write */ |
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loff_t offset; /* offset in the file */ ssize_t size; /* size of the extent */ |
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struct work_struct work; /* data work queue */ |
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struct kiocb *iocb; /* iocb struct for AIO */ int result; /* error value for AIO */ |
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} ext4_io_end_t; |
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/* |
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* Special inodes numbers */ |
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#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 */ |
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/* First non-reserved inode for old ext4 filesystems */ #define EXT4_GOOD_OLD_FIRST_INO 11 |
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/* * Maximal count of links to a file */ |
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#define EXT4_LINK_MAX 65000 |
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/* * Macro-instructions used to manage several block sizes */ |
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#define EXT4_MIN_BLOCK_SIZE 1024 |
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#define EXT4_MAX_BLOCK_SIZE 65536 #define EXT4_MIN_BLOCK_LOG_SIZE 10 |
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#ifdef __KERNEL__ |
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# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) |
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#else |
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# define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
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#endif |
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#define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) |
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#ifdef __KERNEL__ |
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# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
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#else |
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# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
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#endif #ifdef __KERNEL__ |
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#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) |
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#else |
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#define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ EXT4_GOOD_OLD_INODE_SIZE : \ |
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(s)->s_inode_size) |
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#define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ EXT4_GOOD_OLD_FIRST_INO : \ |
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(s)->s_first_ino) #endif |
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#define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) |
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/* |
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* Structure of a blocks group descriptor */ |
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struct ext4_group_desc |
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{ |
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__le32 bg_block_bitmap_lo; /* Blocks bitmap block */ |
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__le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ __le32 bg_inode_table_lo; /* Inodes table block */ |
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__le16 bg_free_blocks_count_lo;/* Free blocks count */ __le16 bg_free_inodes_count_lo;/* Free inodes count */ __le16 bg_used_dirs_count_lo; /* Directories count */ |
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__le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ __u32 bg_reserved[2]; /* Likely block/inode bitmap checksum */ |
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__le16 bg_itable_unused_lo; /* Unused inodes count */ |
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__le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ |
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__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 */ |
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__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 */ |
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__le16 bg_itable_unused_hi; /* Unused inodes count MSB */ |
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__u32 bg_reserved2[3]; |
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}; |
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/* * Structure of a flex block group info */ struct flex_groups { |
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atomic_t free_inodes; atomic_t free_blocks; |
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atomic_t used_dirs; |
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}; |
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#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 */ |
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/* * Macro-instructions used to manage group descriptors */ |
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#define EXT4_MIN_DESC_SIZE 32 |
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#define EXT4_MIN_DESC_SIZE_64BIT 64 |
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#define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) |
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#ifdef __KERNEL__ |
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# 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) |
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#else |
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# define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
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# define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) |
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# define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
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#endif /* * Constants relative to the data blocks */ |
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#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) |
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/* * Inode flags */ |
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#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 */ |
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/* Reserved for compression usage... */ |
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#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 */ |
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/* End compression flags --- maybe not all used */ |
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#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*/ |
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#define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ |
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#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
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#define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ |
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#define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ |
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#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ |
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#define EXT4_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */ #define EXT4_FL_USER_MODIFIABLE 0x004B80FF /* User modifiable flags */ |
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/* Flags that should be inherited by new inodes from their parent. */ #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ EXT4_SYNC_FL | EXT4_IMMUTABLE_FL | EXT4_APPEND_FL |\ EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL) |
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/* Flags that are appropriate for regular files (all but dir-specific ones). */ #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL)) /* Flags that are appropriate for non-directories/regular files. */ #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) /* Mask out flags that are inappropriate for the given type of inode. */ static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) { if (S_ISDIR(mode)) return flags; else if (S_ISREG(mode)) return flags & EXT4_REG_FLMASK; else return flags & EXT4_OTHER_FLMASK; } |
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/* * Inode flags used for atomic set/get */ enum { EXT4_INODE_SECRM = 0, /* Secure deletion */ EXT4_INODE_UNRM = 1, /* Undelete */ EXT4_INODE_COMPR = 2, /* Compress file */ EXT4_INODE_SYNC = 3, /* Synchronous updates */ EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ EXT4_INODE_APPEND = 5, /* writes to file may only append */ EXT4_INODE_NODUMP = 6, /* do not dump file */ EXT4_INODE_NOATIME = 7, /* do not update atime */ /* Reserved for compression usage... */ EXT4_INODE_DIRTY = 8, EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ EXT4_INODE_NOCOMPR = 10, /* Don't compress */ EXT4_INODE_ECOMPR = 11, /* Compression error */ /* End compression flags --- maybe not all used */ EXT4_INODE_INDEX = 12, /* hash-indexed directory */ EXT4_INODE_IMAGIC = 13, /* AFS directory */ EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */ EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ }; #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) #define CHECK_FLAG_VALUE(FLAG) if (!TEST_FLAG_VALUE(FLAG)) { \ printk(KERN_EMERG "EXT4 flag fail: " #FLAG ": %d %d ", \ EXT4_##FLAG##_FL, EXT4_INODE_##FLAG); BUG_ON(1); } /* * Since it's pretty easy to mix up bit numbers and hex values, and we * can't do a compile-time test for ENUM values, we use a run-time * test to make sure that EXT4_XXX_FL is consistent with respect to * EXT4_INODE_XXX. If all is well the printk and BUG_ON will all drop * out so it won't cost any extra space in the compiled kernel image. * But it's important that these values are the same, since we are * using EXT4_INODE_XXX to test for the flag values, but EXT4_XX_FL * must be consistent with the values of FS_XXX_FL defined in * include/linux/fs.h and the on-disk values found in ext2, ext3, and * ext4 filesystems, and of course the values defined in e2fsprogs. * * It's not paranoia if the Murphy's Law really *is* out to get you. :-) */ static inline void ext4_check_flag_values(void) { CHECK_FLAG_VALUE(SECRM); CHECK_FLAG_VALUE(UNRM); CHECK_FLAG_VALUE(COMPR); CHECK_FLAG_VALUE(SYNC); CHECK_FLAG_VALUE(IMMUTABLE); CHECK_FLAG_VALUE(APPEND); CHECK_FLAG_VALUE(NODUMP); CHECK_FLAG_VALUE(NOATIME); CHECK_FLAG_VALUE(DIRTY); CHECK_FLAG_VALUE(COMPRBLK); CHECK_FLAG_VALUE(NOCOMPR); CHECK_FLAG_VALUE(ECOMPR); CHECK_FLAG_VALUE(INDEX); CHECK_FLAG_VALUE(IMAGIC); CHECK_FLAG_VALUE(JOURNAL_DATA); CHECK_FLAG_VALUE(NOTAIL); CHECK_FLAG_VALUE(DIRSYNC); CHECK_FLAG_VALUE(TOPDIR); CHECK_FLAG_VALUE(HUGE_FILE); CHECK_FLAG_VALUE(EXTENTS); CHECK_FLAG_VALUE(EA_INODE); CHECK_FLAG_VALUE(EOFBLOCKS); CHECK_FLAG_VALUE(RESERVED); } |
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/* Used to pass group descriptor data when online resize is done */ |
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struct ext4_new_group_input { |
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__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 */ |
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__u16 unused; }; |
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#if defined(__KERNEL__) && defined(CONFIG_COMPAT) struct compat_ext4_new_group_input { u32 group; compat_u64 block_bitmap; compat_u64 inode_bitmap; compat_u64 inode_table; u32 blocks_count; u16 reserved_blocks; u16 unused; }; #endif |
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/* The struct ext4_new_group_input in kernel space, with free_blocks_count */ struct ext4_new_group_data { |
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__u32 group; |
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__u64 block_bitmap; __u64 inode_bitmap; __u64 inode_table; |
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__u32 blocks_count; __u16 reserved_blocks; __u16 unused; __u32 free_blocks_count; }; |
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/* |
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* Flags used by ext4_map_blocks() |
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*/ |
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/* Allocate any needed blocks and/or convert an unitialized extent to be an initialized ext4 */ |
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#define EXT4_GET_BLOCKS_CREATE 0x0001 |
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/* Request the creation of an unitialized extent */ |
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#define EXT4_GET_BLOCKS_UNINIT_EXT 0x0002 |
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#define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT (EXT4_GET_BLOCKS_UNINIT_EXT|\ EXT4_GET_BLOCKS_CREATE) |
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/* Caller is from the delayed allocation writeout path, |
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so set the magic i_delalloc_reserve_flag after taking the |
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inode allocation semaphore for */ |
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#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 |
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/* caller is from the direct IO path, request to creation of an unitialized extents if not allocated, split the uninitialized extent if blocks has been preallocated already*/ |
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#define EXT4_GET_BLOCKS_PRE_IO 0x0008 |
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#define EXT4_GET_BLOCKS_CONVERT 0x0010 |
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#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ |
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EXT4_GET_BLOCKS_CREATE_UNINIT_EXT) |
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/* Convert extent to initialized after IO complete */ #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ |
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EXT4_GET_BLOCKS_CREATE_UNINIT_EXT) |
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/* |
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* Flags used by ext4_free_blocks */ #define EXT4_FREE_BLOCKS_METADATA 0x0001 #define EXT4_FREE_BLOCKS_FORGET 0x0002 |
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#define EXT4_FREE_BLOCKS_VALIDATED 0x0004 |
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/* |
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* ioctl commands */ |
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#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) |
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#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION |
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#ifdef CONFIG_JBD2_DEBUG |
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#define EXT4_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) |
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#endif |
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#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) |
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#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_MIGRATE _IO('f', 9) |
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/* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ |
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/* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ |
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#define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) |
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#define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) |
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|
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#if defined(__KERNEL__) && defined(CONFIG_COMPAT) |
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/* * ioctl commands in 32 bit emulation */ |
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#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) |
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#define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) |
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#ifdef CONFIG_JBD2_DEBUG |
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#define EXT4_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) |
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#endif |
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#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION |
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#endif |
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/* * Mount options */ |
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struct ext4_mount_options { |
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unsigned long s_mount_opt; uid_t s_resuid; gid_t s_resgid; unsigned long s_commit_interval; |
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u32 s_min_batch_time, s_max_batch_time; |
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#ifdef CONFIG_QUOTA int s_jquota_fmt; char *s_qf_names[MAXQUOTAS]; #endif }; |
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/* Max physical block we can addres w/o extents */ #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF |
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/* * Structure of an inode on the disk */ |
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struct ext4_inode { |
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__le16 i_mode; /* File mode */ __le16 i_uid; /* Low 16 bits of Owner Uid */ |
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__le32 i_size_lo; /* Size in bytes */ |
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__le32 i_atime; /* Access time */ |
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__le32 i_ctime; /* Inode Change time */ |
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__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 */ |
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__le32 i_blocks_lo; /* Blocks count */ |
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__le32 i_flags; /* File flags */ union { struct { |
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__le32 l_i_version; |
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} linux1; struct { __u32 h_i_translator; } hurd1; struct { __u32 m_i_reserved1; } masix1; } osd1; /* OS dependent 1 */ |
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__le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ |
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__le32 i_generation; /* File version (for NFS) */ |
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__le32 i_file_acl_lo; /* File ACL */ |
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__le32 i_size_high; |
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__le32 i_obso_faddr; /* Obsoleted fragment address */ |
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union { struct { |
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__le16 l_i_blocks_high; /* were l_i_reserved1 */ |
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__le16 l_i_file_acl_high; |
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__le16 l_i_uid_high; /* these 2 fields */ |
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__le16 l_i_gid_high; /* were reserved2[0] */ __u32 l_i_reserved2; } linux2; struct { |
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__le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
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__u16 h_i_mode_high; __u16 h_i_uid_high; __u16 h_i_gid_high; __u32 h_i_author; } hurd2; struct { |
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__le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
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__le16 m_i_file_acl_high; |
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__u32 m_i_reserved2[2]; } masix2; } osd2; /* OS dependent 2 */ __le16 i_extra_isize; __le16 i_pad1; |
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__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) */ |
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__le32 i_version_hi; /* high 32 bits for 64-bit version */ |
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}; |
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struct move_extent { __u32 reserved; /* should be zero */ __u32 donor_fd; /* donor file descriptor */ __u64 orig_start; /* logical start offset in block for orig */ __u64 donor_start; /* logical start offset in block for donor */ __u64 len; /* block length to be moved */ __u64 moved_len; /* moved block length */ }; |
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|
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#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 ? |
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(time->tv_sec >> 32) & EXT4_EPOCH_MASK : 0) | ((time->tv_nsec << EXT4_EPOCH_BITS) & EXT4_NSEC_MASK)); |
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} 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; |
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time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; |
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} #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) |
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#define i_disk_version osd1.linux1.l_i_version |
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#if defined(__KERNEL__) || defined(__linux__) #define i_reserved1 osd1.linux1.l_i_reserved1 |
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#define i_file_acl_high osd2.linux2.l_i_file_acl_high |
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#define i_blocks_high osd2.linux2.l_i_blocks_high |
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#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 |
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#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 |
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#define i_file_acl_high osd2.masix2.m_i_file_acl_high |
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#define i_reserved2 osd2.masix2.m_i_reserved2 #endif /* defined(__KERNEL__) || defined(__linux__) */ /* |
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* 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; }; /* * fourth extended file system inode data in memory */ struct ext4_inode_info { __le32 i_data[15]; /* unconverted */ |
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__u32 i_dtime; |
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ext4_fsblk_t i_file_acl; |
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/* * 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; |
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unsigned long i_state_flags; /* Dynamic state flags */ |
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unsigned long i_flags; |
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ext4_lblk_t i_dir_start_lookup; #ifdef CONFIG_EXT4_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 |
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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; /* * 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; struct jbd2_inode jinode; 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; /* ialloc */ ext4_group_t i_last_alloc_group; /* allocation reservation info for delalloc */ unsigned int i_reserved_data_blocks; unsigned int i_reserved_meta_blocks; unsigned int i_allocated_meta_blocks; unsigned short i_delalloc_reserved_flag; |
9d0be5023 ext4: Calculate m... |
802 803 |
sector_t i_da_metadata_calc_last_lblock; int i_da_metadata_calc_len; |
d444c3c38 ext4: Move the ex... |
804 805 806 807 808 |
/* on-disk additional length */ __u16 i_extra_isize; spinlock_t i_block_reservation_lock; |
a9e7f4472 ext4: Convert to ... |
809 810 811 812 |
#ifdef CONFIG_QUOTA /* quota space reservation, managed internally by quota code */ qsize_t i_reserved_quota; #endif |
8d5d02e6b ext4: async direc... |
813 |
|
c7064ef13 ext4: mechanical ... |
814 815 |
/* completed IOs that might need unwritten extents handling */ struct list_head i_completed_io_list; |
744692dc0 ext4: use ext4_ge... |
816 |
spinlock_t i_completed_io_lock; |
8d5d02e6b ext4: async direc... |
817 818 |
/* current io_end structure for async DIO write*/ ext4_io_end_t *cur_aio_dio; |
b436b9bef ext4: Wait for pr... |
819 820 821 822 823 824 825 |
/* * Transactions that contain inode's metadata needed to complete * fsync and fdatasync, respectively. */ tid_t i_sync_tid; tid_t i_datasync_tid; |
d444c3c38 ext4: Move the ex... |
826 827 828 |
}; /* |
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829 830 |
* File system states */ |
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831 832 833 |
#define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ #define EXT4_ERROR_FS 0x0002 /* Errors detected */ #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ |
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834 835 |
/* |
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836 837 838 839 840 841 842 |
* 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 */ /* |
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843 844 |
* Mount flags */ |
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845 846 847 848 849 850 851 852 |
#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*/ |
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#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 */ |
afd4672dc ext4: Add auto_da... |
861 |
#define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ |
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862 |
#define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ |
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863 864 865 |
#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 */ |
744692dc0 ext4: use ext4_ge... |
866 |
#define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ |
d4da6c9cc Revert "ext4: Rem... |
867 |
#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ |
818d276ce ext4: Add the jou... |
868 |
#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ |
25ec56b51 ext4: Add inode v... |
869 |
#define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ |
64769240b ext4: Add delayed... |
870 |
#define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ |
5bf5683a3 ext4: add an opti... |
871 |
#define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ |
6fd058f77 ext4: Add a compr... |
872 |
#define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ |
5328e6353 ext4: make trim/d... |
873 |
#define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ |
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874 |
|
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#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) |
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|
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#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 |
aa02ad67d ext4: Add ext4_fi... |
887 |
#define ext4_find_next_bit ext2_find_next_bit |
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888 889 890 891 |
/* * Maximal mount counts between two filesystem checks */ |
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#define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ |
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894 895 896 897 |
/* * Behaviour when detecting errors */ |
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898 899 900 901 |
#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 |
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902 903 904 905 |
/* * Structure of the super block */ |
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906 |
struct ext4_super_block { |
ac27a0ec1 [PATCH] ext4: ini... |
907 |
/*00*/ __le32 s_inodes_count; /* Inodes count */ |
6bc9feff1 ext4: Convert s_b... |
908 |
__le32 s_blocks_count_lo; /* Blocks count */ |
308ba3ece ext4: Convert s_r... |
909 910 |
__le32 s_r_blocks_count_lo; /* Reserved blocks count */ __le32 s_free_blocks_count_lo; /* Free blocks count */ |
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911 912 913 |
/*10*/ __le32 s_free_inodes_count; /* Free inodes count */ __le32 s_first_data_block; /* First Data Block */ __le32 s_log_block_size; /* Block size */ |
f077d0d7e ext4: Remove (par... |
914 |
__le32 s_obso_log_frag_size; /* Obsoleted fragment size */ |
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915 |
/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ |
f077d0d7e ext4: Remove (par... |
916 |
__le32 s_obso_frags_per_group; /* Obsoleted fragments per group */ |
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917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 |
__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 */ /* |
617ba13b3 [PATCH] ext4: ren... |
933 |
* These fields are for EXT4_DYNAMIC_REV superblocks only. |
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934 935 936 937 938 939 940 941 942 943 944 945 |
* * 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 */ |
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946 |
__le16 s_inode_size; /* size of inode structure */ |
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947 948 949 950 951 952 953 954 955 956 |
__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 |
617ba13b3 [PATCH] ext4: ren... |
957 |
* happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
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958 959 960 961 962 |
*/ __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 */ /* |
617ba13b3 [PATCH] ext4: ren... |
963 |
* Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. |
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964 965 966 967 968 969 970 |
*/ /*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 */ |
89eeddf03 ext4: Define s_jn... |
971 |
__u8 s_jnl_backup_type; |
0d1ee42f2 [PATCH] ext4: all... |
972 |
__le16 s_desc_size; /* size of group descriptor */ |
bd81d8eec [PATCH] ext4: 64b... |
973 |
/*100*/ __le32 s_default_mount_opts; |
ac27a0ec1 [PATCH] ext4: ini... |
974 |
__le32 s_first_meta_bg; /* First metablock block group */ |
bd81d8eec [PATCH] ext4: 64b... |
975 976 977 978 979 980 |
__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 */ |
c1bddad94 ext4: Fix sparse ... |
981 982 983 984 985 986 987 |
__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)*/ |
772cb7c83 ext4: New inode a... |
988 |
__u8 s_log_groups_per_flex; /* FLEX_BG group size */ |
89eeddf03 ext4: Define s_jn... |
989 |
__u8 s_reserved_char_pad; |
772cb7c83 ext4: New inode a... |
990 |
__le16 s_reserved_pad; |
afc32f7ee ext4: Track lifet... |
991 |
__le64 s_kbytes_written; /* nr of lifetime kilobytes written */ |
4a9cdec73 ext4: Add new sup... |
992 993 994 995 996 997 |
__le32 s_snapshot_inum; /* Inode number of active snapshot */ __le32 s_snapshot_id; /* sequential ID of active snapshot */ __le64 s_snapshot_r_blocks_count; /* reserved blocks for active snapshot's future use */ __le32 s_snapshot_list; /* inode number of the head of the on-disk snapshot list */ |
1c13d5c08 ext4: Save error ... |
998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 |
#define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) __le32 s_error_count; /* number of fs errors */ __le32 s_first_error_time; /* first time an error happened */ __le32 s_first_error_ino; /* inode involved in first error */ __le64 s_first_error_block; /* block involved of first error */ __u8 s_first_error_func[32]; /* function where the error happened */ __le32 s_first_error_line; /* line number where error happened */ __le32 s_last_error_time; /* most recent time of an error */ __le32 s_last_error_ino; /* inode involved in last error */ __le32 s_last_error_line; /* line number where error happened */ __le64 s_last_error_block; /* block involved of last error */ __u8 s_last_error_func[32]; /* function where the error happened */ |
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1010 1011 1012 |
#define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) __u8 s_mount_opts[64]; __le32 s_reserved[112]; /* Padding to the end of the block */ |
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1013 |
}; |
1c13d5c08 ext4: Save error ... |
1014 |
#define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) |
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1015 |
#ifdef __KERNEL__ |
bc0b0d6d6 ext4: update the ... |
1016 1017 |
/* |
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1018 |
* run-time mount flags |
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1019 1020 |
*/ #define EXT4_MF_MNTDIR_SAMPLED 0x0001 |
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1021 |
#define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */ |
bc0b0d6d6 ext4: update the ... |
1022 |
|
ca0faba0e ext4: Move the ex... |
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 |
/* * fourth 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 */ |
fb0a387dc ext4: limit block... |
1035 |
ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ |
ca0faba0e ext4: Move the ex... |
1036 1037 1038 1039 1040 1041 |
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; |
7f4520cc6 ext4: change s_mo... |
1042 |
unsigned int s_mount_opt; |
bc0b0d6d6 ext4: update the ... |
1043 |
unsigned int s_mount_flags; |
ca0faba0e ext4: Move the ex... |
1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 |
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; unsigned int s_inode_readahead_blks; |
11013911d ext4: teach the i... |
1054 |
unsigned int s_inode_goal; |
ca0faba0e ext4: Move the ex... |
1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 |
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 percpu_counter s_dirtyblocks_counter; struct blockgroup_lock *s_blockgroup_lock; struct proc_dir_entry *s_proc; struct kobject s_kobj; struct completion s_kobj_unregister; /* 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; u32 s_max_batch_time; u32 s_min_batch_time; 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 */ |
6fd058f77 ext4: Add a compr... |
1088 |
struct rb_root system_blks; |
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1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 |
#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; spinlock_t s_md_lock; tid_t s_last_transaction; unsigned short *s_mb_offsets; unsigned int *s_mb_maxs; /* tunables */ unsigned long s_stripe; unsigned int s_mb_stream_request; unsigned int s_mb_max_to_scan; unsigned int s_mb_min_to_scan; unsigned int s_mb_stats; unsigned int s_mb_order2_reqs; unsigned int s_mb_group_prealloc; |
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1118 |
unsigned int s_max_writeback_mb_bump; |
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/* where last allocation was done - for stream allocation */ unsigned long s_mb_last_group; unsigned long s_mb_last_start; |
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1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 |
/* 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; |
50797481a ext4: Avoid group... |
1137 |
atomic_t s_lock_busy; |
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1138 1139 |
/* locality groups */ |
003cb608a percpu: add __per... |
1140 |
struct ext4_locality_group __percpu *s_locality_groups; |
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1141 1142 1143 1144 1145 1146 1147 |
/* for write statistics */ unsigned long s_sectors_written_start; u64 s_kbytes_written; unsigned int s_log_groups_per_flex; struct flex_groups *s_flex_groups; |
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1148 1149 1150 |
/* workqueue for dio unwritten */ struct workqueue_struct *dio_unwritten_wq; |
66e61a9e9 ext4: Once a day,... |
1151 1152 1153 |
/* timer for periodic error stats printing */ struct timer_list s_err_report; |
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1154 |
}; |
af5bc92dd ext4: Fix whitesp... |
1155 |
static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) |
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1156 1157 1158 |
{ return sb->s_fs_info; } |
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1159 |
static inline struct ext4_inode_info *EXT4_I(struct inode *inode) |
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1160 |
{ |
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1161 |
return container_of(inode, struct ext4_inode_info, vfs_inode); |
ac27a0ec1 [PATCH] ext4: ini... |
1162 |
} |
ef7f38359 ext4: Add nanosec... |
1163 1164 1165 1166 1167 |
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; } |
617ba13b3 [PATCH] ext4: ren... |
1168 |
static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) |
ac27a0ec1 [PATCH] ext4: ini... |
1169 |
{ |
617ba13b3 [PATCH] ext4: ren... |
1170 1171 1172 1173 1174 |
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)); |
ac27a0ec1 [PATCH] ext4: ini... |
1175 |
} |
19f5fb7ad ext4: Use bitops ... |
1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 |
/* * Inode dynamic state flags */ enum { EXT4_STATE_JDATA, /* journaled data exists */ EXT4_STATE_NEW, /* inode is newly created */ EXT4_STATE_XATTR, /* has in-inode xattrs */ EXT4_STATE_NO_EXPAND, /* No space for expansion */ EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/ |
14ece1028 ext4: Make fsync ... |
1188 |
EXT4_STATE_NEWENTRY, /* File just added to dir */ |
19f5fb7ad ext4: Use bitops ... |
1189 |
}; |
12e9b8920 ext4: Use bitops ... |
1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 |
#define EXT4_INODE_BIT_FNS(name, field) \ static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ { \ return test_bit(bit, &EXT4_I(inode)->i_##field); \ } \ static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ { \ set_bit(bit, &EXT4_I(inode)->i_##field); \ } \ static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ { \ clear_bit(bit, &EXT4_I(inode)->i_##field); \ |
19f5fb7ad ext4: Use bitops ... |
1202 |
} |
12e9b8920 ext4: Use bitops ... |
1203 1204 |
EXT4_INODE_BIT_FNS(flag, flags) EXT4_INODE_BIT_FNS(state, state_flags) |
ac27a0ec1 [PATCH] ext4: ini... |
1205 |
#else |
617ba13b3 [PATCH] ext4: ren... |
1206 |
/* Assume that user mode programs are passing in an ext4fs superblock, not |
ac27a0ec1 [PATCH] ext4: ini... |
1207 1208 |
* a kernel struct super_block. This will allow us to call the feature-test * macros from user land. */ |
617ba13b3 [PATCH] ext4: ren... |
1209 |
#define EXT4_SB(sb) (sb) |
ac27a0ec1 [PATCH] ext4: ini... |
1210 |
#endif |
617ba13b3 [PATCH] ext4: ren... |
1211 |
#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime |
ac27a0ec1 [PATCH] ext4: ini... |
1212 1213 1214 1215 |
/* * Codes for operating systems */ |
617ba13b3 [PATCH] ext4: ren... |
1216 1217 1218 1219 1220 |
#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 |
ac27a0ec1 [PATCH] ext4: ini... |
1221 1222 1223 1224 |
/* * Revision levels */ |
617ba13b3 [PATCH] ext4: ren... |
1225 1226 |
#define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ |
ac27a0ec1 [PATCH] ext4: ini... |
1227 |
|
617ba13b3 [PATCH] ext4: ren... |
1228 1229 |
#define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV |
ac27a0ec1 [PATCH] ext4: ini... |
1230 |
|
617ba13b3 [PATCH] ext4: ren... |
1231 |
#define EXT4_GOOD_OLD_INODE_SIZE 128 |
ac27a0ec1 [PATCH] ext4: ini... |
1232 1233 1234 1235 |
/* * Feature set definitions */ |
617ba13b3 [PATCH] ext4: ren... |
1236 |
#define EXT4_HAS_COMPAT_FEATURE(sb,mask) \ |
3a06d778d ext4: sparse fixes |
1237 |
((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0) |
617ba13b3 [PATCH] ext4: ren... |
1238 |
#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
3a06d778d ext4: sparse fixes |
1239 |
((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0) |
617ba13b3 [PATCH] ext4: ren... |
1240 |
#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ |
3a06d778d ext4: sparse fixes |
1241 |
((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0) |
617ba13b3 [PATCH] ext4: ren... |
1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 |
#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 |
0fc1b4514 ext4: Add support... |
1265 |
#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 |
717d50e49 Ext4: Uninitializ... |
1266 |
#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 |
f8628a14a ext4: Remove 6500... |
1267 |
#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 |
ef7f38359 ext4: Add nanosec... |
1268 |
#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 |
617ba13b3 [PATCH] ext4: ren... |
1269 1270 1271 1272 1273 1274 |
#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 |
a86c61812 [PATCH] ext3: add... |
1275 |
#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ |
bd81d8eec [PATCH] ext4: 64b... |
1276 |
#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 |
0fc1b4514 ext4: Add support... |
1277 |
#define EXT4_FEATURE_INCOMPAT_MMP 0x0100 |
ce4215817 ext4: FLEX_BG Ker... |
1278 |
#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 |
f710b4b96 ext4: Reserve INC... |
1279 1280 |
#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ |
617ba13b3 [PATCH] ext4: ren... |
1281 1282 1283 1284 |
#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ EXT4_FEATURE_INCOMPAT_RECOVER| \ |
a86c61812 [PATCH] ext3: add... |
1285 |
EXT4_FEATURE_INCOMPAT_META_BG| \ |
bd81d8eec [PATCH] ext4: 64b... |
1286 |
EXT4_FEATURE_INCOMPAT_EXTENTS| \ |
ce4215817 ext4: FLEX_BG Ker... |
1287 1288 |
EXT4_FEATURE_INCOMPAT_64BIT| \ EXT4_FEATURE_INCOMPAT_FLEX_BG) |
617ba13b3 [PATCH] ext4: ren... |
1289 1290 |
#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ |
717d50e49 Ext4: Uninitializ... |
1291 |
EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ |
f8628a14a ext4: Remove 6500... |
1292 |
EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ |
ef7f38359 ext4: Add nanosec... |
1293 |
EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ |
0fc1b4514 ext4: Add support... |
1294 1295 |
EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ EXT4_FEATURE_RO_COMPAT_HUGE_FILE) |
ac27a0ec1 [PATCH] ext4: ini... |
1296 1297 1298 1299 |
/* * Default values for user and/or group using reserved blocks */ |
617ba13b3 [PATCH] ext4: ren... |
1300 1301 |
#define EXT4_DEF_RESUID 0 #define EXT4_DEF_RESGID 0 |
ac27a0ec1 [PATCH] ext4: ini... |
1302 |
|
240799cdf ext4: Use readahe... |
1303 |
#define EXT4_DEF_INODE_READAHEAD_BLKS 32 |
ac27a0ec1 [PATCH] ext4: ini... |
1304 1305 1306 |
/* * Default mount options */ |
617ba13b3 [PATCH] ext4: ren... |
1307 1308 1309 1310 1311 1312 1313 1314 1315 |
#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 |
8b67f04ab ext4: Add mount o... |
1316 1317 1318 1319 |
#define EXT4_DEFM_NOBARRIER 0x0100 #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 #define EXT4_DEFM_DISCARD 0x0400 #define EXT4_DEFM_NODELALLOC 0x0800 |
ac27a0ec1 [PATCH] ext4: ini... |
1320 1321 |
/* |
30773840c ext4: add fsync b... |
1322 1323 1324 1325 1326 1327 |
* Default journal batch times */ #define EXT4_DEF_MIN_BATCH_TIME 0 #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ /* |
a4912123b ext4: New inode/b... |
1328 1329 1330 1331 1332 1333 |
* Minimum number of groups in a flexgroup before we separate out * directories into the first block group of a flexgroup */ #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 /* |
ac27a0ec1 [PATCH] ext4: ini... |
1334 1335 |
* Structure of a directory entry */ |
617ba13b3 [PATCH] ext4: ren... |
1336 |
#define EXT4_NAME_LEN 255 |
ac27a0ec1 [PATCH] ext4: ini... |
1337 |
|
617ba13b3 [PATCH] ext4: ren... |
1338 |
struct ext4_dir_entry { |
ac27a0ec1 [PATCH] ext4: ini... |
1339 1340 1341 |
__le32 inode; /* Inode number */ __le16 rec_len; /* Directory entry length */ __le16 name_len; /* Name length */ |
617ba13b3 [PATCH] ext4: ren... |
1342 |
char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec1 [PATCH] ext4: ini... |
1343 1344 1345 |
}; /* |
617ba13b3 [PATCH] ext4: ren... |
1346 |
* The new version of the directory entry. Since EXT4 structures are |
ac27a0ec1 [PATCH] ext4: ini... |
1347 1348 1349 1350 |
* 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. */ |
617ba13b3 [PATCH] ext4: ren... |
1351 |
struct ext4_dir_entry_2 { |
ac27a0ec1 [PATCH] ext4: ini... |
1352 1353 1354 1355 |
__le32 inode; /* Inode number */ __le16 rec_len; /* Directory entry length */ __u8 name_len; /* Name length */ __u8 file_type; |
617ba13b3 [PATCH] ext4: ren... |
1356 |
char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec1 [PATCH] ext4: ini... |
1357 1358 1359 |
}; /* |
617ba13b3 [PATCH] ext4: ren... |
1360 |
* Ext4 directory file types. Only the low 3 bits are used. The |
ac27a0ec1 [PATCH] ext4: ini... |
1361 1362 |
* other bits are reserved for now. */ |
617ba13b3 [PATCH] ext4: ren... |
1363 1364 1365 1366 1367 1368 1369 1370 |
#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 |
ac27a0ec1 [PATCH] ext4: ini... |
1371 |
|
617ba13b3 [PATCH] ext4: ren... |
1372 |
#define EXT4_FT_MAX 8 |
ac27a0ec1 [PATCH] ext4: ini... |
1373 1374 |
/* |
617ba13b3 [PATCH] ext4: ren... |
1375 |
* EXT4_DIR_PAD defines the directory entries boundaries |
ac27a0ec1 [PATCH] ext4: ini... |
1376 1377 1378 |
* * NOTE: It must be a multiple of 4 */ |
617ba13b3 [PATCH] ext4: ren... |
1379 1380 1381 1382 |
#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) |
a72d7f834 ext4: Avoid rec_l... |
1383 |
#define EXT4_MAX_REC_LEN ((1<<16)-1) |
ac27a0ec1 [PATCH] ext4: ini... |
1384 |
/* |
0cfc9255a ext4: re-inline e... |
1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 |
* If we ever get support for fs block sizes > page_size, we'll need * to remove the #if statements in the next two functions... */ static inline unsigned int ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) { unsigned len = le16_to_cpu(dlen); #if (PAGE_CACHE_SIZE >= 65536) if (len == EXT4_MAX_REC_LEN || len == 0) return blocksize; return (len & 65532) | ((len & 3) << 16); #else return len; #endif } static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) { if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)) BUG(); #if (PAGE_CACHE_SIZE >= 65536) if (len < 65536) return cpu_to_le16(len); if (len == blocksize) { if (blocksize == 65536) return cpu_to_le16(EXT4_MAX_REC_LEN); else return cpu_to_le16(0); } return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); #else return cpu_to_le16(len); #endif } /* |
ac27a0ec1 [PATCH] ext4: ini... |
1422 1423 1424 |
* Hash Tree Directory indexing * (c) Daniel Phillips, 2001 */ |
4074fe373 ext4: remove #ifd... |
1425 1426 |
#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \ EXT4_FEATURE_COMPAT_DIR_INDEX) && \ |
12e9b8920 ext4: Use bitops ... |
1427 |
ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) |
617ba13b3 [PATCH] ext4: ren... |
1428 1429 |
#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) |
ac27a0ec1 [PATCH] ext4: ini... |
1430 1431 1432 1433 1434 1435 |
/* 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 |
f99b25897 ext4: Add support... |
1436 1437 1438 |
#define DX_HASH_LEGACY_UNSIGNED 3 #define DX_HASH_HALF_MD4_UNSIGNED 4 #define DX_HASH_TEA_UNSIGNED 5 |
ac27a0ec1 [PATCH] ext4: ini... |
1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 |
#ifdef __KERNEL__ /* hash info structure used by the directory hash */ struct dx_hash_info { u32 hash; u32 minor_hash; int hash_version; u32 *seed; }; |
617ba13b3 [PATCH] ext4: ren... |
1450 |
#define EXT4_HTREE_EOF 0x7fffffff |
ac27a0ec1 [PATCH] ext4: ini... |
1451 1452 |
/* |
617ba13b3 [PATCH] ext4: ren... |
1453 |
* Control parameters used by ext4_htree_next_block |
ac27a0ec1 [PATCH] ext4: ini... |
1454 1455 1456 1457 1458 1459 1460 |
*/ #define HASH_NB_ALWAYS 1 /* * Describe an inode's exact location on disk and in memory */ |
617ba13b3 [PATCH] ext4: ren... |
1461 |
struct ext4_iloc |
ac27a0ec1 [PATCH] ext4: ini... |
1462 1463 1464 |
{ struct buffer_head *bh; unsigned long offset; |
fd2d42912 ext4: add ext4_gr... |
1465 |
ext4_group_t block_group; |
ac27a0ec1 [PATCH] ext4: ini... |
1466 |
}; |
617ba13b3 [PATCH] ext4: ren... |
1467 |
static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) |
ac27a0ec1 [PATCH] ext4: ini... |
1468 |
{ |
617ba13b3 [PATCH] ext4: ren... |
1469 |
return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); |
ac27a0ec1 [PATCH] ext4: ini... |
1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 |
} /* * 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 */ |
617ba13b3 [PATCH] ext4: ren... |
1488 |
static inline ext4_fsblk_t |
fd2d42912 ext4: add ext4_gr... |
1489 |
ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) |
ac27a0ec1 [PATCH] ext4: ini... |
1490 |
{ |
617ba13b3 [PATCH] ext4: ren... |
1491 1492 |
return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); |
ac27a0ec1 [PATCH] ext4: ini... |
1493 1494 1495 1496 1497 1498 |
} /* * Special error return code only used by dx_probe() and its callers. */ #define ERR_BAD_DX_DIR -75000 |
72b64b594 [PATCH] ext4 unin... |
1499 |
void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr, |
a9df9a491 ext4: Make ext4_g... |
1500 |
ext4_group_t *blockgrpp, ext4_grpblk_t *offsetp); |
3a5b2ecdd [PATCH] ext4: swi... |
1501 |
|
9f6200bbf ext4: move /proc ... |
1502 |
extern struct proc_dir_entry *ext4_proc_root; |
3a5b2ecdd [PATCH] ext4: swi... |
1503 |
/* |
ac27a0ec1 [PATCH] ext4: ini... |
1504 1505 1506 1507 1508 |
* Function prototypes */ /* * Ok, these declarations are also in <linux/kernel.h> but none of the |
617ba13b3 [PATCH] ext4: ren... |
1509 |
* ext4 source programs needs to include it so they are duplicated here. |
ac27a0ec1 [PATCH] ext4: ini... |
1510 |
*/ |
8c55e2041 EXT4: Fix whitespace |
1511 1512 1513 |
# define NORET_TYPE /**/ # define ATTRIB_NORET __attribute__((noreturn)) # define NORET_AND noreturn, |
ac27a0ec1 [PATCH] ext4: ini... |
1514 |
|
498e5f241 ext4: Change unsi... |
1515 1516 |
/* bitmap.c */ extern unsigned int ext4_count_free(struct buffer_head *, unsigned); |
ac27a0ec1 [PATCH] ext4: ini... |
1517 |
/* balloc.c */ |
3a5b2ecdd [PATCH] ext4: swi... |
1518 1519 1520 1521 |
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); |
fd2d42912 ext4: add ext4_gr... |
1522 1523 1524 |
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); |
7061eba75 ext4: Use inode p... |
1525 |
extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, |
617ba13b3 [PATCH] ext4: ren... |
1526 |
ext4_fsblk_t goal, unsigned long *count, int *errp); |
5c7916168 ext4: Signed arit... |
1527 |
extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks); |
8c3bf8a01 merge ext4_claim_... |
1528 |
extern int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks); |
e21675d4b ext4: Add blocks ... |
1529 1530 |
extern void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, ext4_fsblk_t block, unsigned long count); |
af5bc92dd ext4: Fix whitesp... |
1531 1532 |
extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *); extern void ext4_check_blocks_bitmap(struct super_block *); |
617ba13b3 [PATCH] ext4: ren... |
1533 |
extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, |
fd2d42912 ext4: add ext4_gr... |
1534 |
ext4_group_t block_group, |
ac27a0ec1 [PATCH] ext4: ini... |
1535 |
struct buffer_head ** bh); |
617ba13b3 [PATCH] ext4: ren... |
1536 |
extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); |
bb23c20a8 ext4: Move fs/ext... |
1537 1538 1539 1540 1541 1542 1543 1544 |
struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group); extern unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh, ext4_group_t group, struct ext4_group_desc *desc); #define ext4_free_blocks_after_init(sb, group, desc) \ ext4_init_block_bitmap(sb, NULL, group, desc) |
ac27a0ec1 [PATCH] ext4: ini... |
1545 1546 |
/* dir.c */ |
60fd4da34 ext4: Cleanup ext... |
1547 1548 1549 1550 1551 |
extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, struct ext4_dir_entry_2 *, struct buffer_head *, unsigned int); #define ext4_check_dir_entry(dir, de, bh, offset) \ __ext4_check_dir_entry(__func__, __LINE__, (dir), (de), (bh), (offset)) |
617ba13b3 [PATCH] ext4: ren... |
1552 |
extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, |
ac27a0ec1 [PATCH] ext4: ini... |
1553 |
__u32 minor_hash, |
617ba13b3 [PATCH] ext4: ren... |
1554 1555 |
struct ext4_dir_entry_2 *dirent); extern void ext4_htree_free_dir_info(struct dir_private_info *p); |
ac27a0ec1 [PATCH] ext4: ini... |
1556 1557 |
/* fsync.c */ |
7ea808591 drop unused dentr... |
1558 |
extern int ext4_sync_file(struct file *, int); |
ac27a0ec1 [PATCH] ext4: ini... |
1559 1560 |
/* hash.c */ |
617ba13b3 [PATCH] ext4: ren... |
1561 |
extern int ext4fs_dirhash(const char *name, int len, struct |
ac27a0ec1 [PATCH] ext4: ini... |
1562 1563 1564 |
dx_hash_info *hinfo); /* ialloc.c */ |
f157a4aa9 ext4: Use a hash ... |
1565 |
extern struct inode *ext4_new_inode(handle_t *, struct inode *, int, |
11013911d ext4: teach the i... |
1566 |
const struct qstr *qstr, __u32 goal); |
af5bc92dd ext4: Fix whitesp... |
1567 1568 1569 1570 1571 |
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 *); |
bb23c20a8 ext4: Move fs/ext... |
1572 1573 1574 1575 1576 |
extern unsigned ext4_init_inode_bitmap(struct super_block *sb, struct buffer_head *bh, ext4_group_t group, struct ext4_group_desc *desc); extern void mark_bitmap_end(int start_bit, int end_bit, char *bitmap); |
ac27a0ec1 [PATCH] ext4: ini... |
1577 |
|
c9de560de ext4: Add multi b... |
1578 1579 1580 1581 1582 1583 1584 1585 |
/* 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); |
c2ea3fde6 ext4: Remove old ... |
1586 |
extern void ext4_discard_preallocations(struct inode *); |
c9de560de ext4: Add multi b... |
1587 1588 |
extern int __init init_ext4_mballoc(void); extern void exit_ext4_mballoc(void); |
443387113 ext4: fold ext4_f... |
1589 |
extern void ext4_free_blocks(handle_t *handle, struct inode *inode, |
e6362609b ext4: call ext4_f... |
1590 1591 |
struct buffer_head *bh, ext4_fsblk_t block, unsigned long count, int flags); |
920313a72 ext4: Use EXT4_GR... |
1592 |
extern int ext4_mb_add_groupinfo(struct super_block *sb, |
5f21b0e64 ext4: fix online ... |
1593 |
ext4_group_t i, struct ext4_group_desc *desc); |
920313a72 ext4: Use EXT4_GR... |
1594 1595 1596 |
extern int ext4_mb_get_buddy_cache_lock(struct super_block *, ext4_group_t); extern void ext4_mb_put_buddy_cache_lock(struct super_block *, ext4_group_t, int); |
ac27a0ec1 [PATCH] ext4: ini... |
1597 |
/* inode.c */ |
725d26d3f ext4: Introduce e... |
1598 1599 1600 1601 |
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 *); |
6873fa0de Hook ext4 to the ... |
1602 1603 |
int ext4_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); |
ac27a0ec1 [PATCH] ext4: ini... |
1604 |
|
1d1fe1ee0 iget: stop EXT4 f... |
1605 |
extern struct inode *ext4_iget(struct super_block *, unsigned long); |
a9185b41a pass writeback_co... |
1606 |
extern int ext4_write_inode(struct inode *, struct writeback_control *); |
af5bc92dd ext4: Fix whitesp... |
1607 |
extern int ext4_setattr(struct dentry *, struct iattr *); |
3e3398a08 ext4: delayed all... |
1608 1609 |
extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); |
0930fcc1e convert ext4 to -... |
1610 1611 |
extern void ext4_evict_inode(struct inode *); extern void ext4_clear_inode(struct inode *); |
af5bc92dd ext4: Fix whitesp... |
1612 |
extern int ext4_sync_inode(handle_t *, struct inode *); |
617ba13b3 [PATCH] ext4: ren... |
1613 1614 1615 |
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 *); |
91ef4caf8 ext4: handle corr... |
1616 |
extern int ext4_can_truncate(struct inode *inode); |
af5bc92dd ext4: Fix whitesp... |
1617 |
extern void ext4_truncate(struct inode *); |
487caeef9 ext4: Fix possibl... |
1618 |
extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks); |
617ba13b3 [PATCH] ext4: ren... |
1619 |
extern void ext4_set_inode_flags(struct inode *); |
ff9ddf7e8 ext4: copy i_flag... |
1620 |
extern void ext4_get_inode_flags(struct ext4_inode_info *); |
ccd2506bd ext4: add EXT4_IO... |
1621 |
extern int ext4_alloc_da_blocks(struct inode *inode); |
617ba13b3 [PATCH] ext4: ren... |
1622 |
extern void ext4_set_aops(struct inode *inode); |
a86c61812 [PATCH] ext3: add... |
1623 |
extern int ext4_writepage_trans_blocks(struct inode *); |
a02908f19 ext4: journal cre... |
1624 |
extern int ext4_meta_trans_blocks(struct inode *, int nrblocks, int idxblocks); |
f3bd1f3fa ext4: journal cre... |
1625 |
extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); |
cf108bca4 ext4: Invert the ... |
1626 |
extern int ext4_block_truncate_page(handle_t *handle, |
a86c61812 [PATCH] ext3: add... |
1627 |
struct address_space *mapping, loff_t from); |
c2ec175c3 mm: page_mkwrite ... |
1628 |
extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
a9e7f4472 ext4: Convert to ... |
1629 |
extern qsize_t *ext4_get_reserved_space(struct inode *inode); |
c7064ef13 ext4: mechanical ... |
1630 |
extern int flush_completed_IO(struct inode *inode); |
5f634d064 ext4: Fix quota a... |
1631 1632 |
extern void ext4_da_update_reserve_space(struct inode *inode, int used, int quota_claim); |
ac27a0ec1 [PATCH] ext4: ini... |
1633 |
/* ioctl.c */ |
5cdd7b2d7 Convert ext4 to u... |
1634 |
extern long ext4_ioctl(struct file *, unsigned int, unsigned long); |
af5bc92dd ext4: Fix whitesp... |
1635 |
extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); |
ac27a0ec1 [PATCH] ext4: ini... |
1636 |
|
c14c6fd5c ext4: Add EXT4_IO... |
1637 |
/* migrate.c */ |
2a43a8780 ext4: elevate wri... |
1638 |
extern int ext4_ext_migrate(struct inode *); |
3d0518f47 ext4: New rec_len... |
1639 |
|
ac27a0ec1 [PATCH] ext4: ini... |
1640 |
/* namei.c */ |
617ba13b3 [PATCH] ext4: ren... |
1641 1642 1643 |
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, |
ac27a0ec1 [PATCH] ext4: ini... |
1644 1645 1646 |
__u32 start_minor_hash, __u32 *next_hash); /* resize.c */ |
617ba13b3 [PATCH] ext4: ren... |
1647 1648 1649 1650 1651 |
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); |
ac27a0ec1 [PATCH] ext4: ini... |
1652 1653 |
/* super.c */ |
c398eda0e ext4: Pass line n... |
1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 |
extern void __ext4_error(struct super_block *, const char *, unsigned int, const char *, ...) __attribute__ ((format (printf, 4, 5))); #define ext4_error(sb, message...) __ext4_error(sb, __func__, \ __LINE__, ## message) extern void ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t, const char *, ...) __attribute__ ((format (printf, 5, 6))); extern void ext4_error_file(struct file *, const char *, unsigned int, const char *, ...) __attribute__ ((format (printf, 4, 5))); extern void __ext4_std_error(struct super_block *, const char *, unsigned int, int); extern void __ext4_abort(struct super_block *, const char *, unsigned int, const char *, ...) __attribute__ ((format (printf, 4, 5))); |
c67d859e3 ext4: clean up ex... |
1670 |
#define ext4_abort(sb, message...) __ext4_abort(sb, __func__, \ |
c398eda0e ext4: Pass line n... |
1671 1672 |
__LINE__, ## message) extern void __ext4_warning(struct super_block *, const char *, unsigned int, |
12062dddd ext4: move __func... |
1673 |
const char *, ...) |
c398eda0e ext4: Pass line n... |
1674 1675 1676 |
__attribute__ ((format (printf, 4, 5))); #define ext4_warning(sb, message...) __ext4_warning(sb, __func__, \ __LINE__, ## message) |
b31e15527 ext4: Change all ... |
1677 1678 |
extern void ext4_msg(struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4))); |
e29136f80 ext4: Enhance ext... |
1679 1680 1681 1682 1683 1684 1685 |
extern void __ext4_grp_locked_error(const char *, unsigned int, \ struct super_block *, ext4_group_t, \ unsigned long, ext4_fsblk_t, \ const char *, ...) __attribute__ ((format (printf, 7, 8))); #define ext4_grp_locked_error(sb, grp, message...) \ __ext4_grp_locked_error(__func__, __LINE__, (sb), (grp), ## message) |
af5bc92dd ext4: Fix whitesp... |
1686 |
extern void ext4_update_dynamic_rev(struct super_block *sb); |
99e6f829a ext4: Introduce e... |
1687 1688 1689 1690 1691 1692 |
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); |
8fadc1432 [PATCH] ext4: mov... |
1693 1694 1695 1696 1697 1698 |
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); |
560671a0d ext4: Use high 16... |
1699 1700 1701 1702 1703 1704 1705 1706 |
extern __u32 ext4_free_blks_count(struct super_block *sb, struct ext4_group_desc *bg); extern __u32 ext4_free_inodes_count(struct super_block *sb, struct ext4_group_desc *bg); extern __u32 ext4_used_dirs_count(struct super_block *sb, struct ext4_group_desc *bg); extern __u32 ext4_itable_unused_count(struct super_block *sb, struct ext4_group_desc *bg); |
8fadc1432 [PATCH] ext4: mov... |
1707 1708 1709 1710 1711 1712 |
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); |
560671a0d ext4: Use high 16... |
1713 1714 1715 1716 1717 1718 1719 1720 |
extern void ext4_free_blks_set(struct super_block *sb, struct ext4_group_desc *bg, __u32 count); extern void ext4_free_inodes_set(struct super_block *sb, struct ext4_group_desc *bg, __u32 count); extern void ext4_used_dirs_set(struct super_block *sb, struct ext4_group_desc *bg, __u32 count); extern void ext4_itable_unused_set(struct super_block *sb, struct ext4_group_desc *bg, __u32 count); |
bb23c20a8 ext4: Move fs/ext... |
1721 1722 1723 1724 |
extern __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 group, struct ext4_group_desc *gdp); extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group, struct ext4_group_desc *gdp); |
bd81d8eec [PATCH] ext4: 64b... |
1725 1726 1727 1728 |
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) | |
6bc9feff1 ext4: Convert s_b... |
1729 |
le32_to_cpu(es->s_blocks_count_lo); |
bd81d8eec [PATCH] ext4: 64b... |
1730 1731 1732 1733 1734 |
} 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) | |
308ba3ece ext4: Convert s_r... |
1735 |
le32_to_cpu(es->s_r_blocks_count_lo); |
bd81d8eec [PATCH] ext4: 64b... |
1736 1737 1738 1739 1740 |
} 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) | |
308ba3ece ext4: Convert s_r... |
1741 |
le32_to_cpu(es->s_free_blocks_count_lo); |
bd81d8eec [PATCH] ext4: 64b... |
1742 1743 1744 1745 1746 |
} static inline void ext4_blocks_count_set(struct ext4_super_block *es, ext4_fsblk_t blk) { |
6bc9feff1 ext4: Convert s_b... |
1747 |
es->s_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8eec [PATCH] ext4: 64b... |
1748 1749 1750 1751 1752 1753 |
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) { |
308ba3ece ext4: Convert s_r... |
1754 |
es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8eec [PATCH] ext4: 64b... |
1755 1756 1757 1758 1759 1760 |
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) { |
308ba3ece ext4: Convert s_r... |
1761 |
es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8eec [PATCH] ext4: 64b... |
1762 1763 |
es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); } |
a48380f76 ext4: Rename i_di... |
1764 1765 |
static inline loff_t ext4_isize(struct ext4_inode *raw_inode) { |
06a279d63 ext4: only use i_... |
1766 1767 1768 1769 1770 |
if (S_ISREG(le16_to_cpu(raw_inode->i_mode))) return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | le32_to_cpu(raw_inode->i_size_lo); else return (loff_t) le32_to_cpu(raw_inode->i_size_lo); |
a48380f76 ext4: Rename i_di... |
1771 |
} |
bd81d8eec [PATCH] ext4: 64b... |
1772 |
|
a48380f76 ext4: Rename i_di... |
1773 1774 1775 1776 1777 |
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); } |
ac27a0ec1 [PATCH] ext4: ini... |
1778 |
|
c9de560de ext4: Add multi b... |
1779 1780 |
static inline struct ext4_group_info *ext4_get_group_info(struct super_block *sb, |
af5bc92dd ext4: Fix whitesp... |
1781 |
ext4_group_t group) |
c9de560de ext4: Add multi b... |
1782 1783 1784 1785 1786 1787 1788 1789 |
{ 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]; } |
8df9675f8 ext4: Avoid races... |
1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 |
/* * Reading s_groups_count requires using smp_rmb() afterwards. See * the locking protocol documented in the comments of ext4_group_add() * in resize.c */ static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) { ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; smp_rmb(); return ngroups; } |
c9de560de ext4: Add multi b... |
1802 |
|
772cb7c83 ext4: New inode a... |
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 |
static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, ext4_group_t block_group) { return block_group >> sbi->s_log_groups_per_flex; } static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) { return 1 << sbi->s_log_groups_per_flex; } |
617ba13b3 [PATCH] ext4: ren... |
1813 |
#define ext4_std_error(sb, errno) \ |
ac27a0ec1 [PATCH] ext4: ini... |
1814 1815 |
do { \ if ((errno)) \ |
c398eda0e ext4: Pass line n... |
1816 |
__ext4_std_error((sb), __func__, __LINE__, (errno)); \ |
ac27a0ec1 [PATCH] ext4: ini... |
1817 |
} while (0) |
a30d542a0 ext4: Make sure a... |
1818 |
#ifdef CONFIG_SMP |
179f7ebff percpu_counter: F... |
1819 |
/* Each CPU can accumulate percpu_counter_batch blocks in their local |
a30d542a0 ext4: Make sure a... |
1820 |
* counters. So we need to make sure we have free blocks more |
179f7ebff percpu_counter: F... |
1821 |
* than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. |
a30d542a0 ext4: Make sure a... |
1822 |
*/ |
179f7ebff percpu_counter: F... |
1823 |
#define EXT4_FREEBLOCKS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) |
a30d542a0 ext4: Make sure a... |
1824 1825 1826 |
#else #define EXT4_FREEBLOCKS_WATERMARK 0 #endif |
cf17fea65 ext4: Properly up... |
1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 |
static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) { /* * XXX: replace with spinlock if seen contended -bzzz */ down_write(&EXT4_I(inode)->i_data_sem); if (newsize > EXT4_I(inode)->i_disksize) EXT4_I(inode)->i_disksize = newsize; up_write(&EXT4_I(inode)->i_data_sem); return ; } |
a30d542a0 ext4: Make sure a... |
1838 |
|
5d1b1b3f4 ext4: fix BUG whe... |
1839 1840 1841 |
struct ext4_group_info { unsigned long bb_state; struct rb_root bb_free_root; |
a36b44988 ext4: use ext4_gr... |
1842 1843 1844 |
ext4_grpblk_t bb_first_free; /* first free block */ ext4_grpblk_t bb_free; /* total free blocks */ ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ |
8a57d9d61 ext4: check for a... |
1845 |
ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ |
5d1b1b3f4 ext4: fix BUG whe... |
1846 1847 1848 1849 1850 |
struct list_head bb_prealloc_list; #ifdef DOUBLE_CHECK void *bb_bitmap; #endif struct rw_semaphore alloc_sem; |
a36b44988 ext4: use ext4_gr... |
1851 1852 1853 1854 |
ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block * regions, index is order. * bb_counters[3] = 5 means * 5 free 8-block regions. */ |
5d1b1b3f4 ext4: fix BUG whe... |
1855 1856 1857 |
}; #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 |
5d1b1b3f4 ext4: fix BUG whe... |
1858 1859 1860 |
#define EXT4_MB_GRP_NEED_INIT(grp) \ (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) |
50797481a ext4: Avoid group... |
1861 1862 |
#define EXT4_MAX_CONTENTION 8 #define EXT4_CONTENTION_THRESHOLD 2 |
955ce5f5b ext4: Convert ext... |
1863 1864 |
static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, ext4_group_t group) |
5d1b1b3f4 ext4: fix BUG whe... |
1865 |
{ |
955ce5f5b ext4: Convert ext... |
1866 1867 |
return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); } |
5d1b1b3f4 ext4: fix BUG whe... |
1868 |
|
50797481a ext4: Avoid group... |
1869 1870 1871 1872 1873 1874 1875 1876 |
/* * Returns true if the filesystem is busy enough that attempts to * access the block group locks has run into contention. */ static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) { return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); } |
955ce5f5b ext4: Convert ext... |
1877 1878 |
static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) { |
50797481a ext4: Avoid group... |
1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 |
spinlock_t *lock = ext4_group_lock_ptr(sb, group); if (spin_trylock(lock)) /* * We're able to grab the lock right away, so drop the * lock contention counter. */ atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); else { /* * The lock is busy, so bump the contention counter, * and then wait on the spin lock. */ atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, EXT4_MAX_CONTENTION); spin_lock(lock); } |
5d1b1b3f4 ext4: fix BUG whe... |
1895 1896 1897 1898 1899 |
} static inline void ext4_unlock_group(struct super_block *sb, ext4_group_t group) { |
955ce5f5b ext4: Convert ext... |
1900 |
spin_unlock(ext4_group_lock_ptr(sb, group)); |
5d1b1b3f4 ext4: fix BUG whe... |
1901 |
} |
a0375156c ext4: Clean up s_... |
1902 1903 1904 1905 1906 |
static inline void ext4_mark_super_dirty(struct super_block *sb) { if (EXT4_SB(sb)->s_journal == NULL) sb->s_dirt =1; } |
ac27a0ec1 [PATCH] ext4: ini... |
1907 1908 1909 1910 1911 |
/* * Inodes and files operations */ /* dir.c */ |
617ba13b3 [PATCH] ext4: ren... |
1912 |
extern const struct file_operations ext4_dir_operations; |
ac27a0ec1 [PATCH] ext4: ini... |
1913 1914 |
/* file.c */ |
c5ef1c42c [PATCH] mark stru... |
1915 |
extern const struct inode_operations ext4_file_inode_operations; |
617ba13b3 [PATCH] ext4: ren... |
1916 |
extern const struct file_operations ext4_file_operations; |
ac27a0ec1 [PATCH] ext4: ini... |
1917 1918 |
/* namei.c */ |
c5ef1c42c [PATCH] mark stru... |
1919 1920 |
extern const struct inode_operations ext4_dir_inode_operations; extern const struct inode_operations ext4_special_inode_operations; |
596397b77 ext4: Move fs/ext... |
1921 |
extern struct dentry *ext4_get_parent(struct dentry *child); |
ac27a0ec1 [PATCH] ext4: ini... |
1922 1923 |
/* symlink.c */ |
c5ef1c42c [PATCH] mark stru... |
1924 1925 |
extern const struct inode_operations ext4_symlink_inode_operations; extern const struct inode_operations ext4_fast_symlink_inode_operations; |
ac27a0ec1 [PATCH] ext4: ini... |
1926 |
|
6fd058f77 ext4: Add a compr... |
1927 1928 1929 1930 1931 1932 1933 1934 |
/* block_validity */ extern void ext4_release_system_zone(struct super_block *sb); extern int ext4_setup_system_zone(struct super_block *sb); extern int __init init_ext4_system_zone(void); extern void exit_ext4_system_zone(void); extern int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk, unsigned int count); |
a86c61812 [PATCH] ext3: add... |
1935 1936 1937 |
/* extents.c */ extern int ext4_ext_tree_init(handle_t *handle, struct inode *); extern int ext4_ext_writepage_trans_blocks(struct inode *, int); |
a02908f19 ext4: journal cre... |
1938 1939 |
extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, int chunk); |
e35fd6609 ext4: Add new abs... |
1940 1941 |
extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, struct ext4_map_blocks *map, int flags); |
cf108bca4 ext4: Invert the ... |
1942 |
extern void ext4_ext_truncate(struct inode *); |
a86c61812 [PATCH] ext3: add... |
1943 1944 |
extern void ext4_ext_init(struct super_block *); extern void ext4_ext_release(struct super_block *); |
a2df2a634 fallocate support... |
1945 1946 |
extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len); |
0031462b5 ext4: Split unini... |
1947 |
extern int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset, |
a1de02dcc ext4: fix async i... |
1948 |
ssize_t len); |
e35fd6609 ext4: Add new abs... |
1949 1950 |
extern int ext4_map_blocks(handle_t *handle, struct inode *inode, struct ext4_map_blocks *map, int flags); |
3a06d778d ext4: sparse fixes |
1951 1952 |
extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len); |
748de6736 ext4: online defr... |
1953 1954 1955 1956 |
/* move_extent.c */ extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 start_orig, __u64 start_donor, __u64 len, __u64 *moved_len); |
3a06d778d ext4: sparse fixes |
1957 |
|
744692dc0 ext4: use ext4_ge... |
1958 1959 1960 1961 1962 1963 1964 1965 |
/* BH_Uninit flag: blocks are allocated but uninitialized on disk */ enum ext4_state_bits { BH_Uninit /* blocks are allocated but uninitialized on disk */ = BH_JBDPrivateStart, }; BUFFER_FNS(Uninit, uninit) TAS_BUFFER_FNS(Uninit, uninit) |
2ccb5fb9f ext4: Use new buf... |
1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 |
/* * Add new method to test wether block and inode bitmaps are properly * initialized. With uninit_bg reading the block from disk is not enough * to mark the bitmap uptodate. We need to also zero-out the bitmap */ #define BH_BITMAP_UPTODATE BH_JBDPrivateStart static inline int bitmap_uptodate(struct buffer_head *bh) { return (buffer_uptodate(bh) && test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); } static inline void set_bitmap_uptodate(struct buffer_head *bh) { set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); } |
731eb1a03 ext4: consolidate... |
1982 |
#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) |
ac27a0ec1 [PATCH] ext4: ini... |
1983 |
#endif /* __KERNEL__ */ |
3dcf54515 ext4: move header... |
1984 |
#endif /* _EXT4_H */ |