867 lines
29 KiB
C
867 lines
29 KiB
C
/*
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* linux/include/linux/ext3_fs.h
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/include/linux/minix_fs.h
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#ifndef _LINUX_EXT3_FS_H
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#define _LINUX_EXT3_FS_H
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#include <linux/types.h>
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#include <linux/magic.h>
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/*
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* The second extended filesystem constants/structures
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*/
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/*
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* Define EXT3FS_DEBUG to produce debug messages
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*/
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#undef EXT3FS_DEBUG
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/*
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* Define EXT3_RESERVATION to reserve data blocks for expanding files
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*/
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#define EXT3_DEFAULT_RESERVE_BLOCKS 8
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/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
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#define EXT3_MAX_RESERVE_BLOCKS 1027
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#define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
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/*
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* Always enable hashed directories
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*/
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#define CONFIG_EXT3_INDEX
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/*
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* Debug code
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*/
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#ifdef EXT3FS_DEBUG
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#define ext3_debug(f, a...) \
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do { \
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printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
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__FILE__, __LINE__, __FUNCTION__); \
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printk (KERN_DEBUG f, ## a); \
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} while (0)
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#else
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#define ext3_debug(f, a...) do {} while (0)
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#endif
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/*
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* Special inodes numbers
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*/
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#define EXT3_BAD_INO 1 /* Bad blocks inode */
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#define EXT3_ROOT_INO 2 /* Root inode */
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#define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
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#define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
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#define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
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#define EXT3_JOURNAL_INO 8 /* Journal inode */
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/* First non-reserved inode for old ext3 filesystems */
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#define EXT3_GOOD_OLD_FIRST_INO 11
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/*
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* Maximal count of links to a file
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*/
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#define EXT3_LINK_MAX 32000
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/*
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* Macro-instructions used to manage several block sizes
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*/
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#define EXT3_MIN_BLOCK_SIZE 1024
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#define EXT3_MAX_BLOCK_SIZE 4096
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#define EXT3_MIN_BLOCK_LOG_SIZE 10
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#ifdef __KERNEL__
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# define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
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#else
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# define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
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#endif
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#define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
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#ifdef __KERNEL__
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# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
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#else
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# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
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#endif
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#ifdef __KERNEL__
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#define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits)
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#define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size)
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#define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino)
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#else
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#define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
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EXT3_GOOD_OLD_INODE_SIZE : \
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(s)->s_inode_size)
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#define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
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EXT3_GOOD_OLD_FIRST_INO : \
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(s)->s_first_ino)
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#endif
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/*
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* Macro-instructions used to manage fragments
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*/
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#define EXT3_MIN_FRAG_SIZE 1024
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#define EXT3_MAX_FRAG_SIZE 4096
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#define EXT3_MIN_FRAG_LOG_SIZE 10
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#ifdef __KERNEL__
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# define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size)
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# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block)
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#else
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# define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
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# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
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#endif
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/*
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* Structure of a blocks group descriptor
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*/
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struct ext3_group_desc
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{
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__le32 bg_block_bitmap; /* Blocks bitmap block */
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__le32 bg_inode_bitmap; /* Inodes bitmap block */
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__le32 bg_inode_table; /* Inodes table block */
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__le16 bg_free_blocks_count; /* Free blocks count */
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__le16 bg_free_inodes_count; /* Free inodes count */
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__le16 bg_used_dirs_count; /* Directories count */
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__u16 bg_pad;
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__le32 bg_reserved[3];
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};
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/*
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* Macro-instructions used to manage group descriptors
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*/
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#ifdef __KERNEL__
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# define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group)
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# define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block)
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# define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group)
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# define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits)
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#else
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# define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
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# define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
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# define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
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#endif
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/*
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* Constants relative to the data blocks
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*/
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#define EXT3_NDIR_BLOCKS 12
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#define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
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#define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
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#define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
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#define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
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/*
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* Inode flags
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*/
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#define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
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#define EXT3_UNRM_FL 0x00000002 /* Undelete */
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#define EXT3_COMPR_FL 0x00000004 /* Compress file */
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#define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
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#define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
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#define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
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#define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
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#define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
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/* Reserved for compression usage... */
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#define EXT3_DIRTY_FL 0x00000100
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#define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
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#define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
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#define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
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/* End compression flags --- maybe not all used */
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#define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
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#define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
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#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
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#define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */
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#define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
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#define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
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#define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
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#define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
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#define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
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/*
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* Inode dynamic state flags
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*/
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#define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
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#define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
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#define EXT3_STATE_XATTR 0x00000004 /* has in-inode xattrs */
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/* Used to pass group descriptor data when online resize is done */
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struct ext3_new_group_input {
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__u32 group; /* Group number for this data */
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__u32 block_bitmap; /* Absolute block number of block bitmap */
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__u32 inode_bitmap; /* Absolute block number of inode bitmap */
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__u32 inode_table; /* Absolute block number of inode table start */
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__u32 blocks_count; /* Total number of blocks in this group */
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__u16 reserved_blocks; /* Number of reserved blocks in this group */
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__u16 unused;
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};
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/* The struct ext3_new_group_input in kernel space, with free_blocks_count */
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struct ext3_new_group_data {
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__u32 group;
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__u32 block_bitmap;
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__u32 inode_bitmap;
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__u32 inode_table;
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__u32 blocks_count;
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__u16 reserved_blocks;
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__u16 unused;
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__u32 free_blocks_count;
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};
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/*
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* ioctl commands
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*/
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#define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
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#define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
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#define EXT3_IOC_GETVERSION _IOR('f', 3, long)
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#define EXT3_IOC_SETVERSION _IOW('f', 4, long)
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#define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
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#define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input)
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#define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
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#define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
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#ifdef CONFIG_JBD_DEBUG
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#define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
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#endif
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#define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
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#define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
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/*
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* Mount options
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*/
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struct ext3_mount_options {
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unsigned long s_mount_opt;
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uid_t s_resuid;
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gid_t s_resgid;
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unsigned long s_commit_interval;
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#ifdef CONFIG_QUOTA
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int s_jquota_fmt;
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char *s_qf_names[MAXQUOTAS];
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#endif
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};
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/*
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* Structure of an inode on the disk
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*/
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struct ext3_inode {
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__le16 i_mode; /* File mode */
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__le16 i_uid; /* Low 16 bits of Owner Uid */
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__le32 i_size; /* Size in bytes */
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__le32 i_atime; /* Access time */
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__le32 i_ctime; /* Creation time */
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__le32 i_mtime; /* Modification time */
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__le32 i_dtime; /* Deletion Time */
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__le16 i_gid; /* Low 16 bits of Group Id */
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__le16 i_links_count; /* Links count */
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__le32 i_blocks; /* Blocks count */
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__le32 i_flags; /* File flags */
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union {
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struct {
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__u32 l_i_reserved1;
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} linux1;
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struct {
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__u32 h_i_translator;
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} hurd1;
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struct {
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__u32 m_i_reserved1;
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} masix1;
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} osd1; /* OS dependent 1 */
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__le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
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__le32 i_generation; /* File version (for NFS) */
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__le32 i_file_acl; /* File ACL */
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__le32 i_dir_acl; /* Directory ACL */
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__le32 i_faddr; /* Fragment address */
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union {
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struct {
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__u8 l_i_frag; /* Fragment number */
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__u8 l_i_fsize; /* Fragment size */
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__u16 i_pad1;
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__le16 l_i_uid_high; /* these 2 fields */
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__le16 l_i_gid_high; /* were reserved2[0] */
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__u32 l_i_reserved2;
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} linux2;
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struct {
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__u8 h_i_frag; /* Fragment number */
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__u8 h_i_fsize; /* Fragment size */
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__u16 h_i_mode_high;
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__u16 h_i_uid_high;
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__u16 h_i_gid_high;
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__u32 h_i_author;
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} hurd2;
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struct {
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__u8 m_i_frag; /* Fragment number */
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__u8 m_i_fsize; /* Fragment size */
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__u16 m_pad1;
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__u32 m_i_reserved2[2];
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} masix2;
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} osd2; /* OS dependent 2 */
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__le16 i_extra_isize;
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__le16 i_pad1;
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};
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#define i_size_high i_dir_acl
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#if defined(__KERNEL__) || defined(__linux__)
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#define i_reserved1 osd1.linux1.l_i_reserved1
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#define i_frag osd2.linux2.l_i_frag
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#define i_fsize osd2.linux2.l_i_fsize
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#define i_uid_low i_uid
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#define i_gid_low i_gid
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#define i_uid_high osd2.linux2.l_i_uid_high
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#define i_gid_high osd2.linux2.l_i_gid_high
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#define i_reserved2 osd2.linux2.l_i_reserved2
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#elif defined(__GNU__)
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#define i_translator osd1.hurd1.h_i_translator
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#define i_frag osd2.hurd2.h_i_frag;
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#define i_fsize osd2.hurd2.h_i_fsize;
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#define i_uid_high osd2.hurd2.h_i_uid_high
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#define i_gid_high osd2.hurd2.h_i_gid_high
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#define i_author osd2.hurd2.h_i_author
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#elif defined(__masix__)
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#define i_reserved1 osd1.masix1.m_i_reserved1
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#define i_frag osd2.masix2.m_i_frag
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#define i_fsize osd2.masix2.m_i_fsize
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#define i_reserved2 osd2.masix2.m_i_reserved2
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#endif /* defined(__KERNEL__) || defined(__linux__) */
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/*
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* File system states
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*/
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#define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
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#define EXT3_ERROR_FS 0x0002 /* Errors detected */
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#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
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/*
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* Mount flags
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*/
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#define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */
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#define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
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#define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */
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#define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */
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#define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
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#define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
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#define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
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#define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
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#define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
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#define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */
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#define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
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#define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
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#define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
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#define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
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#define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
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#define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
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#define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
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#define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
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#define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
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#define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
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#define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */
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#define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
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#define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
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#define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
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/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
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#ifndef _LINUX_EXT2_FS_H
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#define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
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#define set_opt(o, opt) o |= EXT3_MOUNT_##opt
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#define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \
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EXT3_MOUNT_##opt)
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#else
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#define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
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#define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
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#define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
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#endif
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#define ext3_set_bit ext2_set_bit
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#define ext3_set_bit_atomic ext2_set_bit_atomic
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#define ext3_clear_bit ext2_clear_bit
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#define ext3_clear_bit_atomic ext2_clear_bit_atomic
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#define ext3_test_bit ext2_test_bit
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#define ext3_find_first_zero_bit ext2_find_first_zero_bit
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#define ext3_find_next_zero_bit ext2_find_next_zero_bit
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/*
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* Maximal mount counts between two filesystem checks
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*/
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#define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
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#define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
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/*
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* Behaviour when detecting errors
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*/
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#define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
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#define EXT3_ERRORS_RO 2 /* Remount fs read-only */
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#define EXT3_ERRORS_PANIC 3 /* Panic */
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#define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
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/*
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* Structure of the super block
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*/
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struct ext3_super_block {
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/*00*/ __le32 s_inodes_count; /* Inodes count */
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__le32 s_blocks_count; /* Blocks count */
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__le32 s_r_blocks_count; /* Reserved blocks count */
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__le32 s_free_blocks_count; /* Free blocks count */
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/*10*/ __le32 s_free_inodes_count; /* Free inodes count */
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__le32 s_first_data_block; /* First Data Block */
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__le32 s_log_block_size; /* Block size */
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__le32 s_log_frag_size; /* Fragment size */
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/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
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__le32 s_frags_per_group; /* # Fragments per group */
|
|
__le32 s_inodes_per_group; /* # Inodes per group */
|
|
__le32 s_mtime; /* Mount time */
|
|
/*30*/ __le32 s_wtime; /* Write time */
|
|
__le16 s_mnt_count; /* Mount count */
|
|
__le16 s_max_mnt_count; /* Maximal mount count */
|
|
__le16 s_magic; /* Magic signature */
|
|
__le16 s_state; /* File system state */
|
|
__le16 s_errors; /* Behaviour when detecting errors */
|
|
__le16 s_minor_rev_level; /* minor revision level */
|
|
/*40*/ __le32 s_lastcheck; /* time of last check */
|
|
__le32 s_checkinterval; /* max. time between checks */
|
|
__le32 s_creator_os; /* OS */
|
|
__le32 s_rev_level; /* Revision level */
|
|
/*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
|
|
__le16 s_def_resgid; /* Default gid for reserved blocks */
|
|
/*
|
|
* These fields are for EXT3_DYNAMIC_REV superblocks only.
|
|
*
|
|
* Note: the difference between the compatible feature set and
|
|
* the incompatible feature set is that if there is a bit set
|
|
* in the incompatible feature set that the kernel doesn't
|
|
* know about, it should refuse to mount the filesystem.
|
|
*
|
|
* e2fsck's requirements are more strict; if it doesn't know
|
|
* about a feature in either the compatible or incompatible
|
|
* feature set, it must abort and not try to meddle with
|
|
* things it doesn't understand...
|
|
*/
|
|
__le32 s_first_ino; /* First non-reserved inode */
|
|
__le16 s_inode_size; /* size of inode structure */
|
|
__le16 s_block_group_nr; /* block group # of this superblock */
|
|
__le32 s_feature_compat; /* compatible feature set */
|
|
/*60*/ __le32 s_feature_incompat; /* incompatible feature set */
|
|
__le32 s_feature_ro_compat; /* readonly-compatible feature set */
|
|
/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
|
|
/*78*/ char s_volume_name[16]; /* volume name */
|
|
/*88*/ char s_last_mounted[64]; /* directory where last mounted */
|
|
/*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
|
|
/*
|
|
* Performance hints. Directory preallocation should only
|
|
* happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
|
|
*/
|
|
__u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
|
|
__u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
|
|
__u16 s_reserved_gdt_blocks; /* Per group desc for online growth */
|
|
/*
|
|
* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
|
|
*/
|
|
/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
|
|
/*E0*/ __le32 s_journal_inum; /* inode number of journal file */
|
|
__le32 s_journal_dev; /* device number of journal file */
|
|
__le32 s_last_orphan; /* start of list of inodes to delete */
|
|
__le32 s_hash_seed[4]; /* HTREE hash seed */
|
|
__u8 s_def_hash_version; /* Default hash version to use */
|
|
__u8 s_reserved_char_pad;
|
|
__u16 s_reserved_word_pad;
|
|
__le32 s_default_mount_opts;
|
|
__le32 s_first_meta_bg; /* First metablock block group */
|
|
__u32 s_reserved[190]; /* Padding to the end of the block */
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/ext3_fs_i.h>
|
|
#include <linux/ext3_fs_sb.h>
|
|
static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
|
|
{
|
|
return sb->s_fs_info;
|
|
}
|
|
static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct ext3_inode_info, vfs_inode);
|
|
}
|
|
|
|
static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
|
|
{
|
|
return ino == EXT3_ROOT_INO ||
|
|
ino == EXT3_JOURNAL_INO ||
|
|
ino == EXT3_RESIZE_INO ||
|
|
(ino >= EXT3_FIRST_INO(sb) &&
|
|
ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
|
|
}
|
|
#else
|
|
/* Assume that user mode programs are passing in an ext3fs superblock, not
|
|
* a kernel struct super_block. This will allow us to call the feature-test
|
|
* macros from user land. */
|
|
#define EXT3_SB(sb) (sb)
|
|
#endif
|
|
|
|
#define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
|
|
|
|
/*
|
|
* Codes for operating systems
|
|
*/
|
|
#define EXT3_OS_LINUX 0
|
|
#define EXT3_OS_HURD 1
|
|
#define EXT3_OS_MASIX 2
|
|
#define EXT3_OS_FREEBSD 3
|
|
#define EXT3_OS_LITES 4
|
|
|
|
/*
|
|
* Revision levels
|
|
*/
|
|
#define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
|
|
#define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
|
|
|
|
#define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
|
|
#define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
|
|
|
|
#define EXT3_GOOD_OLD_INODE_SIZE 128
|
|
|
|
/*
|
|
* Feature set definitions
|
|
*/
|
|
|
|
#define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
|
|
( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
|
|
#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
|
|
( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
|
|
#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
|
|
( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
|
|
#define EXT3_SET_COMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
|
|
#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
|
|
#define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
|
|
#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
|
|
#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
|
|
#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
|
|
|
|
#define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
|
|
#define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
|
|
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
|
|
#define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
|
|
#define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
|
|
#define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
|
|
|
|
#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
|
|
#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
|
|
#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
|
|
|
|
#define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
|
|
#define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
|
|
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
|
|
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
|
|
#define EXT3_FEATURE_INCOMPAT_META_BG 0x0010
|
|
|
|
#define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
|
|
#define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
|
|
EXT3_FEATURE_INCOMPAT_RECOVER| \
|
|
EXT3_FEATURE_INCOMPAT_META_BG)
|
|
#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
|
|
EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
|
|
EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
|
|
|
|
/*
|
|
* Default values for user and/or group using reserved blocks
|
|
*/
|
|
#define EXT3_DEF_RESUID 0
|
|
#define EXT3_DEF_RESGID 0
|
|
|
|
/*
|
|
* Default mount options
|
|
*/
|
|
#define EXT3_DEFM_DEBUG 0x0001
|
|
#define EXT3_DEFM_BSDGROUPS 0x0002
|
|
#define EXT3_DEFM_XATTR_USER 0x0004
|
|
#define EXT3_DEFM_ACL 0x0008
|
|
#define EXT3_DEFM_UID16 0x0010
|
|
#define EXT3_DEFM_JMODE 0x0060
|
|
#define EXT3_DEFM_JMODE_DATA 0x0020
|
|
#define EXT3_DEFM_JMODE_ORDERED 0x0040
|
|
#define EXT3_DEFM_JMODE_WBACK 0x0060
|
|
|
|
/*
|
|
* Structure of a directory entry
|
|
*/
|
|
#define EXT3_NAME_LEN 255
|
|
|
|
struct ext3_dir_entry {
|
|
__le32 inode; /* Inode number */
|
|
__le16 rec_len; /* Directory entry length */
|
|
__le16 name_len; /* Name length */
|
|
char name[EXT3_NAME_LEN]; /* File name */
|
|
};
|
|
|
|
/*
|
|
* The new version of the directory entry. Since EXT3 structures are
|
|
* stored in intel byte order, and the name_len field could never be
|
|
* bigger than 255 chars, it's safe to reclaim the extra byte for the
|
|
* file_type field.
|
|
*/
|
|
struct ext3_dir_entry_2 {
|
|
__le32 inode; /* Inode number */
|
|
__le16 rec_len; /* Directory entry length */
|
|
__u8 name_len; /* Name length */
|
|
__u8 file_type;
|
|
char name[EXT3_NAME_LEN]; /* File name */
|
|
};
|
|
|
|
/*
|
|
* Ext3 directory file types. Only the low 3 bits are used. The
|
|
* other bits are reserved for now.
|
|
*/
|
|
#define EXT3_FT_UNKNOWN 0
|
|
#define EXT3_FT_REG_FILE 1
|
|
#define EXT3_FT_DIR 2
|
|
#define EXT3_FT_CHRDEV 3
|
|
#define EXT3_FT_BLKDEV 4
|
|
#define EXT3_FT_FIFO 5
|
|
#define EXT3_FT_SOCK 6
|
|
#define EXT3_FT_SYMLINK 7
|
|
|
|
#define EXT3_FT_MAX 8
|
|
|
|
/*
|
|
* EXT3_DIR_PAD defines the directory entries boundaries
|
|
*
|
|
* NOTE: It must be a multiple of 4
|
|
*/
|
|
#define EXT3_DIR_PAD 4
|
|
#define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
|
|
#define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
|
|
~EXT3_DIR_ROUND)
|
|
/*
|
|
* Hash Tree Directory indexing
|
|
* (c) Daniel Phillips, 2001
|
|
*/
|
|
|
|
#ifdef CONFIG_EXT3_INDEX
|
|
#define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
|
|
EXT3_FEATURE_COMPAT_DIR_INDEX) && \
|
|
(EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
|
|
#define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
|
|
#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
|
|
#else
|
|
#define is_dx(dir) 0
|
|
#define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
|
|
#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
|
|
#endif
|
|
|
|
/* Legal values for the dx_root hash_version field: */
|
|
|
|
#define DX_HASH_LEGACY 0
|
|
#define DX_HASH_HALF_MD4 1
|
|
#define DX_HASH_TEA 2
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* hash info structure used by the directory hash */
|
|
struct dx_hash_info
|
|
{
|
|
u32 hash;
|
|
u32 minor_hash;
|
|
int hash_version;
|
|
u32 *seed;
|
|
};
|
|
|
|
#define EXT3_HTREE_EOF 0x7fffffff
|
|
|
|
/*
|
|
* Control parameters used by ext3_htree_next_block
|
|
*/
|
|
#define HASH_NB_ALWAYS 1
|
|
|
|
|
|
/*
|
|
* Describe an inode's exact location on disk and in memory
|
|
*/
|
|
struct ext3_iloc
|
|
{
|
|
struct buffer_head *bh;
|
|
unsigned long offset;
|
|
unsigned long block_group;
|
|
};
|
|
|
|
static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
|
|
{
|
|
return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
|
|
}
|
|
|
|
/*
|
|
* This structure is stuffed into the struct file's private_data field
|
|
* for directories. It is where we put information so that we can do
|
|
* readdir operations in hash tree order.
|
|
*/
|
|
struct dir_private_info {
|
|
struct rb_root root;
|
|
struct rb_node *curr_node;
|
|
struct fname *extra_fname;
|
|
loff_t last_pos;
|
|
__u32 curr_hash;
|
|
__u32 curr_minor_hash;
|
|
__u32 next_hash;
|
|
};
|
|
|
|
/* calculate the first block number of the group */
|
|
static inline ext3_fsblk_t
|
|
ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
|
|
{
|
|
return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
|
|
le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
|
|
}
|
|
|
|
/*
|
|
* Special error return code only used by dx_probe() and its callers.
|
|
*/
|
|
#define ERR_BAD_DX_DIR -75000
|
|
|
|
/*
|
|
* Function prototypes
|
|
*/
|
|
|
|
/*
|
|
* Ok, these declarations are also in <linux/kernel.h> but none of the
|
|
* ext3 source programs needs to include it so they are duplicated here.
|
|
*/
|
|
# define NORET_TYPE /**/
|
|
# define ATTRIB_NORET __attribute__((noreturn))
|
|
# define NORET_AND noreturn,
|
|
|
|
/* balloc.c */
|
|
extern int ext3_bg_has_super(struct super_block *sb, int group);
|
|
extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
|
|
extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
|
|
ext3_fsblk_t goal, int *errp);
|
|
extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
|
|
ext3_fsblk_t goal, unsigned long *count, int *errp);
|
|
extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
|
|
ext3_fsblk_t block, unsigned long count);
|
|
extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
|
|
ext3_fsblk_t block, unsigned long count,
|
|
unsigned long *pdquot_freed_blocks);
|
|
extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
|
|
extern void ext3_check_blocks_bitmap (struct super_block *);
|
|
extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
|
|
unsigned int block_group,
|
|
struct buffer_head ** bh);
|
|
extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
|
|
extern void ext3_init_block_alloc_info(struct inode *);
|
|
extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
|
|
|
|
/* dir.c */
|
|
extern int ext3_check_dir_entry(const char *, struct inode *,
|
|
struct ext3_dir_entry_2 *,
|
|
struct buffer_head *, unsigned long);
|
|
extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
|
|
__u32 minor_hash,
|
|
struct ext3_dir_entry_2 *dirent);
|
|
extern void ext3_htree_free_dir_info(struct dir_private_info *p);
|
|
|
|
/* fsync.c */
|
|
extern int ext3_sync_file (struct file *, struct dentry *, int);
|
|
|
|
/* hash.c */
|
|
extern int ext3fs_dirhash(const char *name, int len, struct
|
|
dx_hash_info *hinfo);
|
|
|
|
/* ialloc.c */
|
|
extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
|
|
extern void ext3_free_inode (handle_t *, struct inode *);
|
|
extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
|
|
extern unsigned long ext3_count_free_inodes (struct super_block *);
|
|
extern unsigned long ext3_count_dirs (struct super_block *);
|
|
extern void ext3_check_inodes_bitmap (struct super_block *);
|
|
extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
|
|
|
|
|
|
/* inode.c */
|
|
int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
|
|
struct buffer_head *bh, ext3_fsblk_t blocknr);
|
|
struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
|
|
struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
|
|
int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
|
|
sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
|
|
int create, int extend_disksize);
|
|
|
|
extern void ext3_read_inode (struct inode *);
|
|
extern int ext3_write_inode (struct inode *, int);
|
|
extern int ext3_setattr (struct dentry *, struct iattr *);
|
|
extern void ext3_delete_inode (struct inode *);
|
|
extern int ext3_sync_inode (handle_t *, struct inode *);
|
|
extern void ext3_discard_reservation (struct inode *);
|
|
extern void ext3_dirty_inode(struct inode *);
|
|
extern int ext3_change_inode_journal_flag(struct inode *, int);
|
|
extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
|
|
extern void ext3_truncate (struct inode *);
|
|
extern void ext3_set_inode_flags(struct inode *);
|
|
extern void ext3_set_aops(struct inode *inode);
|
|
|
|
/* ioctl.c */
|
|
extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
|
|
unsigned long);
|
|
|
|
/* namei.c */
|
|
extern int ext3_orphan_add(handle_t *, struct inode *);
|
|
extern int ext3_orphan_del(handle_t *, struct inode *);
|
|
extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
|
|
__u32 start_minor_hash, __u32 *next_hash);
|
|
|
|
/* resize.c */
|
|
extern int ext3_group_add(struct super_block *sb,
|
|
struct ext3_new_group_data *input);
|
|
extern int ext3_group_extend(struct super_block *sb,
|
|
struct ext3_super_block *es,
|
|
ext3_fsblk_t n_blocks_count);
|
|
|
|
/* super.c */
|
|
extern void ext3_error (struct super_block *, const char *, const char *, ...)
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
extern void __ext3_std_error (struct super_block *, const char *, int);
|
|
extern void ext3_abort (struct super_block *, const char *, const char *, ...)
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
extern void ext3_warning (struct super_block *, const char *, const char *, ...)
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
extern void ext3_update_dynamic_rev (struct super_block *sb);
|
|
|
|
#define ext3_std_error(sb, errno) \
|
|
do { \
|
|
if ((errno)) \
|
|
__ext3_std_error((sb), __FUNCTION__, (errno)); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Inodes and files operations
|
|
*/
|
|
|
|
/* dir.c */
|
|
extern const struct file_operations ext3_dir_operations;
|
|
|
|
/* file.c */
|
|
extern struct inode_operations ext3_file_inode_operations;
|
|
extern const struct file_operations ext3_file_operations;
|
|
|
|
/* namei.c */
|
|
extern struct inode_operations ext3_dir_inode_operations;
|
|
extern struct inode_operations ext3_special_inode_operations;
|
|
|
|
/* symlink.c */
|
|
extern struct inode_operations ext3_symlink_inode_operations;
|
|
extern struct inode_operations ext3_fast_symlink_inode_operations;
|
|
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_EXT3_FS_H */
|