mirror of https://gitee.com/openkylin/linux.git
migrate ext2_fs.h guts to fs/ext2/ext2.h
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
39429c5e4a
commit
f7699f2b01
631
fs/ext2/ext2.h
631
fs/ext2/ext2.h
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@ -1,5 +1,636 @@
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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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#include <linux/fs.h>
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#include <linux/ext2_fs.h>
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#include <linux/blockgroup_lock.h>
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#include <linux/percpu_counter.h>
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#include <linux/rbtree.h>
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/* XXX Here for now... not interested in restructing headers JUST now */
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/* data type for block offset of block group */
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typedef int ext2_grpblk_t;
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/* data type for filesystem-wide blocks number */
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typedef unsigned long ext2_fsblk_t;
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#define E2FSBLK "%lu"
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struct ext2_reserve_window {
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ext2_fsblk_t _rsv_start; /* First byte reserved */
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ext2_fsblk_t _rsv_end; /* Last byte reserved or 0 */
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};
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struct ext2_reserve_window_node {
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struct rb_node rsv_node;
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__u32 rsv_goal_size;
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__u32 rsv_alloc_hit;
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struct ext2_reserve_window rsv_window;
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};
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struct ext2_block_alloc_info {
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/* information about reservation window */
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struct ext2_reserve_window_node rsv_window_node;
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/*
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* was i_next_alloc_block in ext2_inode_info
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* is the logical (file-relative) number of the
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* most-recently-allocated block in this file.
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* We use this for detecting linearly ascending allocation requests.
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*/
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__u32 last_alloc_logical_block;
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/*
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* Was i_next_alloc_goal in ext2_inode_info
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* is the *physical* companion to i_next_alloc_block.
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* it the the physical block number of the block which was most-recentl
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* allocated to this file. This give us the goal (target) for the next
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* allocation when we detect linearly ascending requests.
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*/
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ext2_fsblk_t last_alloc_physical_block;
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};
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#define rsv_start rsv_window._rsv_start
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#define rsv_end rsv_window._rsv_end
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/*
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* second extended-fs super-block data in memory
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*/
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struct ext2_sb_info {
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unsigned long s_frag_size; /* Size of a fragment in bytes */
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unsigned long s_frags_per_block;/* Number of fragments per block */
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unsigned long s_inodes_per_block;/* Number of inodes per block */
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unsigned long s_frags_per_group;/* Number of fragments in a group */
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unsigned long s_blocks_per_group;/* Number of blocks in a group */
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unsigned long s_inodes_per_group;/* Number of inodes in a group */
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unsigned long s_itb_per_group; /* Number of inode table blocks per group */
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unsigned long s_gdb_count; /* Number of group descriptor blocks */
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unsigned long s_desc_per_block; /* Number of group descriptors per block */
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unsigned long s_groups_count; /* Number of groups in the fs */
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unsigned long s_overhead_last; /* Last calculated overhead */
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unsigned long s_blocks_last; /* Last seen block count */
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struct buffer_head * s_sbh; /* Buffer containing the super block */
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struct ext2_super_block * s_es; /* Pointer to the super block in the buffer */
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struct buffer_head ** s_group_desc;
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unsigned long s_mount_opt;
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unsigned long s_sb_block;
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uid_t s_resuid;
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gid_t s_resgid;
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unsigned short s_mount_state;
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unsigned short s_pad;
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int s_addr_per_block_bits;
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int s_desc_per_block_bits;
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int s_inode_size;
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int s_first_ino;
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spinlock_t s_next_gen_lock;
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u32 s_next_generation;
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unsigned long s_dir_count;
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u8 *s_debts;
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struct percpu_counter s_freeblocks_counter;
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struct percpu_counter s_freeinodes_counter;
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struct percpu_counter s_dirs_counter;
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struct blockgroup_lock *s_blockgroup_lock;
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/* root of the per fs reservation window tree */
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spinlock_t s_rsv_window_lock;
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struct rb_root s_rsv_window_root;
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struct ext2_reserve_window_node s_rsv_window_head;
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/*
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* s_lock protects against concurrent modifications of s_mount_state,
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* s_blocks_last, s_overhead_last and the content of superblock's
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* buffer pointed to by sbi->s_es.
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*
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* Note: It is used in ext2_show_options() to provide a consistent view
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* of the mount options.
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*/
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spinlock_t s_lock;
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};
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static inline spinlock_t *
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sb_bgl_lock(struct ext2_sb_info *sbi, unsigned int block_group)
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{
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return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group);
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}
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/*
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* Define EXT2FS_DEBUG to produce debug messages
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*/
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#undef EXT2FS_DEBUG
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/*
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* Define EXT2_RESERVATION to reserve data blocks for expanding files
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*/
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#define EXT2_DEFAULT_RESERVE_BLOCKS 8
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/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
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#define EXT2_MAX_RESERVE_BLOCKS 1027
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#define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
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/*
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* The second extended file system version
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*/
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#define EXT2FS_DATE "95/08/09"
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#define EXT2FS_VERSION "0.5b"
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/*
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* Debug code
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*/
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#ifdef EXT2FS_DEBUG
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# define ext2_debug(f, a...) { \
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printk ("EXT2-fs DEBUG (%s, %d): %s:", \
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__FILE__, __LINE__, __func__); \
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printk (f, ## a); \
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}
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#else
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# define ext2_debug(f, a...) /**/
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#endif
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/*
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* Special inode numbers
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*/
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#define EXT2_BAD_INO 1 /* Bad blocks inode */
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#define EXT2_ROOT_INO 2 /* Root inode */
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#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
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#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
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/* First non-reserved inode for old ext2 filesystems */
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#define EXT2_GOOD_OLD_FIRST_INO 11
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static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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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 EXT2_MIN_BLOCK_SIZE 1024
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#define EXT2_MAX_BLOCK_SIZE 4096
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#define EXT2_MIN_BLOCK_LOG_SIZE 10
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#define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
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#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
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#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
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#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
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#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size)
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#define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino)
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/*
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* Macro-instructions used to manage fragments
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*/
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#define EXT2_MIN_FRAG_SIZE 1024
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#define EXT2_MAX_FRAG_SIZE 4096
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#define EXT2_MIN_FRAG_LOG_SIZE 10
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#define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size)
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#define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block)
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/*
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* Structure of a blocks group descriptor
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*/
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struct ext2_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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__le16 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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#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
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#define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block)
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#define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
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#define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
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/*
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* Constants relative to the data blocks
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*/
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#define EXT2_NDIR_BLOCKS 12
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#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
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#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
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#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
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#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
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/*
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* Inode flags (GETFLAGS/SETFLAGS)
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*/
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#define EXT2_SECRM_FL FS_SECRM_FL /* Secure deletion */
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#define EXT2_UNRM_FL FS_UNRM_FL /* Undelete */
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#define EXT2_COMPR_FL FS_COMPR_FL /* Compress file */
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#define EXT2_SYNC_FL FS_SYNC_FL /* Synchronous updates */
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#define EXT2_IMMUTABLE_FL FS_IMMUTABLE_FL /* Immutable file */
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#define EXT2_APPEND_FL FS_APPEND_FL /* writes to file may only append */
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#define EXT2_NODUMP_FL FS_NODUMP_FL /* do not dump file */
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#define EXT2_NOATIME_FL FS_NOATIME_FL /* do not update atime */
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/* Reserved for compression usage... */
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#define EXT2_DIRTY_FL FS_DIRTY_FL
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#define EXT2_COMPRBLK_FL FS_COMPRBLK_FL /* One or more compressed clusters */
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#define EXT2_NOCOMP_FL FS_NOCOMP_FL /* Don't compress */
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#define EXT2_ECOMPR_FL FS_ECOMPR_FL /* Compression error */
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/* End compression flags --- maybe not all used */
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#define EXT2_BTREE_FL FS_BTREE_FL /* btree format dir */
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#define EXT2_INDEX_FL FS_INDEX_FL /* hash-indexed directory */
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#define EXT2_IMAGIC_FL FS_IMAGIC_FL /* AFS directory */
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#define EXT2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL /* Reserved for ext3 */
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#define EXT2_NOTAIL_FL FS_NOTAIL_FL /* file tail should not be merged */
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#define EXT2_DIRSYNC_FL FS_DIRSYNC_FL /* dirsync behaviour (directories only) */
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#define EXT2_TOPDIR_FL FS_TOPDIR_FL /* Top of directory hierarchies*/
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#define EXT2_RESERVED_FL FS_RESERVED_FL /* reserved for ext2 lib */
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#define EXT2_FL_USER_VISIBLE FS_FL_USER_VISIBLE /* User visible flags */
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#define EXT2_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE /* User modifiable flags */
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/* Flags that should be inherited by new inodes from their parent. */
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#define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\
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EXT2_SYNC_FL | EXT2_NODUMP_FL |\
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EXT2_NOATIME_FL | EXT2_COMPRBLK_FL |\
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EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\
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EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL)
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/* Flags that are appropriate for regular files (all but dir-specific ones). */
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#define EXT2_REG_FLMASK (~(EXT2_DIRSYNC_FL | EXT2_TOPDIR_FL))
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/* Flags that are appropriate for non-directories/regular files. */
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#define EXT2_OTHER_FLMASK (EXT2_NODUMP_FL | EXT2_NOATIME_FL)
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/* Mask out flags that are inappropriate for the given type of inode. */
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static inline __u32 ext2_mask_flags(umode_t mode, __u32 flags)
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{
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if (S_ISDIR(mode))
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return flags;
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else if (S_ISREG(mode))
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return flags & EXT2_REG_FLMASK;
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else
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return flags & EXT2_OTHER_FLMASK;
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}
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/*
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* ioctl commands
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*/
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#define EXT2_IOC_GETFLAGS FS_IOC_GETFLAGS
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#define EXT2_IOC_SETFLAGS FS_IOC_SETFLAGS
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#define EXT2_IOC_GETVERSION FS_IOC_GETVERSION
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#define EXT2_IOC_SETVERSION FS_IOC_SETVERSION
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#define EXT2_IOC_GETRSVSZ _IOR('f', 5, long)
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#define EXT2_IOC_SETRSVSZ _IOW('f', 6, long)
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/*
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* ioctl commands in 32 bit emulation
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*/
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#define EXT2_IOC32_GETFLAGS FS_IOC32_GETFLAGS
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#define EXT2_IOC32_SETFLAGS FS_IOC32_SETFLAGS
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#define EXT2_IOC32_GETVERSION FS_IOC32_GETVERSION
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#define EXT2_IOC32_SETVERSION FS_IOC32_SETVERSION
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/*
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* Structure of an inode on the disk
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*/
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struct ext2_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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__le32 l_i_reserved1;
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} linux1;
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struct {
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__le32 h_i_translator;
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} hurd1;
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struct {
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__le32 m_i_reserved1;
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} masix1;
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} osd1; /* OS dependent 1 */
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__le32 i_block[EXT2_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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__le16 h_i_mode_high;
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__le16 h_i_uid_high;
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__le16 h_i_gid_high;
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__le32 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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};
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#define i_size_high i_dir_acl
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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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/*
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* File system states
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*/
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#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
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#define EXT2_ERROR_FS 0x0002 /* Errors detected */
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/*
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* Mount flags
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*/
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#define EXT2_MOUNT_CHECK 0x000001 /* Do mount-time checks */
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#define EXT2_MOUNT_OLDALLOC 0x000002 /* Don't use the new Orlov allocator */
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#define EXT2_MOUNT_GRPID 0x000004 /* Create files with directory's group */
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#define EXT2_MOUNT_DEBUG 0x000008 /* Some debugging messages */
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#define EXT2_MOUNT_ERRORS_CONT 0x000010 /* Continue on errors */
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#define EXT2_MOUNT_ERRORS_RO 0x000020 /* Remount fs ro on errors */
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#define EXT2_MOUNT_ERRORS_PANIC 0x000040 /* Panic on errors */
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#define EXT2_MOUNT_MINIX_DF 0x000080 /* Mimics the Minix statfs */
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#define EXT2_MOUNT_NOBH 0x000100 /* No buffer_heads */
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#define EXT2_MOUNT_NO_UID32 0x000200 /* Disable 32-bit UIDs */
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#define EXT2_MOUNT_XATTR_USER 0x004000 /* Extended user attributes */
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#define EXT2_MOUNT_POSIX_ACL 0x008000 /* POSIX Access Control Lists */
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#define EXT2_MOUNT_XIP 0x010000 /* Execute in place */
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#define EXT2_MOUNT_USRQUOTA 0x020000 /* user quota */
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#define EXT2_MOUNT_GRPQUOTA 0x040000 /* group quota */
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#define EXT2_MOUNT_RESERVATION 0x080000 /* Preallocation */
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#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
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#define set_opt(o, opt) o |= EXT2_MOUNT_##opt
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#define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \
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EXT2_MOUNT_##opt)
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/*
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* Maximal mount counts between two filesystem checks
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*/
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#define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
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#define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
|
||||
|
||||
/*
|
||||
* Behaviour when detecting errors
|
||||
*/
|
||||
#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
|
||||
#define EXT2_ERRORS_RO 2 /* Remount fs read-only */
|
||||
#define EXT2_ERRORS_PANIC 3 /* Panic */
|
||||
#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
|
||||
|
||||
/*
|
||||
* Structure of the super block
|
||||
*/
|
||||
struct ext2_super_block {
|
||||
__le32 s_inodes_count; /* Inodes count */
|
||||
__le32 s_blocks_count; /* Blocks count */
|
||||
__le32 s_r_blocks_count; /* Reserved blocks count */
|
||||
__le32 s_free_blocks_count; /* Free blocks count */
|
||||
__le32 s_free_inodes_count; /* Free inodes count */
|
||||
__le32 s_first_data_block; /* First Data Block */
|
||||
__le32 s_log_block_size; /* Block size */
|
||||
__le32 s_log_frag_size; /* Fragment size */
|
||||
__le32 s_blocks_per_group; /* # Blocks per group */
|
||||
__le32 s_frags_per_group; /* # Fragments per group */
|
||||
__le32 s_inodes_per_group; /* # Inodes per group */
|
||||
__le32 s_mtime; /* Mount time */
|
||||
__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 */
|
||||
__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 */
|
||||
__le16 s_def_resuid; /* Default uid for reserved blocks */
|
||||
__le16 s_def_resgid; /* Default gid for reserved blocks */
|
||||
/*
|
||||
* These fields are for EXT2_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 */
|
||||
__le32 s_feature_incompat; /* incompatible feature set */
|
||||
__le32 s_feature_ro_compat; /* readonly-compatible feature set */
|
||||
__u8 s_uuid[16]; /* 128-bit uuid for volume */
|
||||
char s_volume_name[16]; /* volume name */
|
||||
char s_last_mounted[64]; /* directory where last mounted */
|
||||
__le32 s_algorithm_usage_bitmap; /* For compression */
|
||||
/*
|
||||
* Performance hints. Directory preallocation should only
|
||||
* happen if the EXT2_COMPAT_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_padding1;
|
||||
/*
|
||||
* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
|
||||
*/
|
||||
__u8 s_journal_uuid[16]; /* uuid of journal superblock */
|
||||
__u32 s_journal_inum; /* inode number of journal file */
|
||||
__u32 s_journal_dev; /* device number of journal file */
|
||||
__u32 s_last_orphan; /* start of list of inodes to delete */
|
||||
__u32 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 */
|
||||
};
|
||||
|
||||
/*
|
||||
* Codes for operating systems
|
||||
*/
|
||||
#define EXT2_OS_LINUX 0
|
||||
#define EXT2_OS_HURD 1
|
||||
#define EXT2_OS_MASIX 2
|
||||
#define EXT2_OS_FREEBSD 3
|
||||
#define EXT2_OS_LITES 4
|
||||
|
||||
/*
|
||||
* Revision levels
|
||||
*/
|
||||
#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
|
||||
#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
|
||||
|
||||
#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
|
||||
#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
|
||||
|
||||
#define EXT2_GOOD_OLD_INODE_SIZE 128
|
||||
|
||||
/*
|
||||
* Feature set definitions
|
||||
*/
|
||||
|
||||
#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
|
||||
( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
|
||||
#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
|
||||
( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
|
||||
#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
|
||||
( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
|
||||
#define EXT2_SET_COMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
|
||||
#define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
|
||||
#define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
|
||||
#define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
|
||||
#define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
|
||||
#define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
|
||||
|
||||
#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
|
||||
#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
|
||||
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
|
||||
#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
|
||||
#define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
|
||||
#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
|
||||
#define EXT2_FEATURE_COMPAT_ANY 0xffffffff
|
||||
|
||||
#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
|
||||
#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
|
||||
#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
|
||||
#define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
|
||||
|
||||
#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
|
||||
#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
|
||||
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
|
||||
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
|
||||
#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
|
||||
#define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff
|
||||
|
||||
#define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
|
||||
#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
|
||||
EXT2_FEATURE_INCOMPAT_META_BG)
|
||||
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
|
||||
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
|
||||
EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
|
||||
#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
|
||||
#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
|
||||
|
||||
/*
|
||||
* Default values for user and/or group using reserved blocks
|
||||
*/
|
||||
#define EXT2_DEF_RESUID 0
|
||||
#define EXT2_DEF_RESGID 0
|
||||
|
||||
/*
|
||||
* Default mount options
|
||||
*/
|
||||
#define EXT2_DEFM_DEBUG 0x0001
|
||||
#define EXT2_DEFM_BSDGROUPS 0x0002
|
||||
#define EXT2_DEFM_XATTR_USER 0x0004
|
||||
#define EXT2_DEFM_ACL 0x0008
|
||||
#define EXT2_DEFM_UID16 0x0010
|
||||
/* Not used by ext2, but reserved for use by ext3 */
|
||||
#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
|
||||
*/
|
||||
|
||||
struct ext2_dir_entry {
|
||||
__le32 inode; /* Inode number */
|
||||
__le16 rec_len; /* Directory entry length */
|
||||
__le16 name_len; /* Name length */
|
||||
char name[]; /* File name, up to EXT2_NAME_LEN */
|
||||
};
|
||||
|
||||
/*
|
||||
* The new version of the directory entry. Since EXT2 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 ext2_dir_entry_2 {
|
||||
__le32 inode; /* Inode number */
|
||||
__le16 rec_len; /* Directory entry length */
|
||||
__u8 name_len; /* Name length */
|
||||
__u8 file_type;
|
||||
char name[]; /* File name, up to EXT2_NAME_LEN */
|
||||
};
|
||||
|
||||
/*
|
||||
* Ext2 directory file types. Only the low 3 bits are used. The
|
||||
* other bits are reserved for now.
|
||||
*/
|
||||
enum {
|
||||
EXT2_FT_UNKNOWN = 0,
|
||||
EXT2_FT_REG_FILE = 1,
|
||||
EXT2_FT_DIR = 2,
|
||||
EXT2_FT_CHRDEV = 3,
|
||||
EXT2_FT_BLKDEV = 4,
|
||||
EXT2_FT_FIFO = 5,
|
||||
EXT2_FT_SOCK = 6,
|
||||
EXT2_FT_SYMLINK = 7,
|
||||
EXT2_FT_MAX
|
||||
};
|
||||
|
||||
/*
|
||||
* EXT2_DIR_PAD defines the directory entries boundaries
|
||||
*
|
||||
* NOTE: It must be a multiple of 4
|
||||
*/
|
||||
#define EXT2_DIR_PAD 4
|
||||
#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
|
||||
#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
|
||||
~EXT2_DIR_ROUND)
|
||||
#define EXT2_MAX_REC_LEN ((1<<16)-1)
|
||||
|
||||
static inline void verify_offsets(void)
|
||||
{
|
||||
#define A(x,y) BUILD_BUG_ON(x != offsetof(struct ext2_super_block, y));
|
||||
A(EXT2_SB_MAGIC_OFFSET, s_magic);
|
||||
A(EXT2_SB_BLOCKS_OFFSET, s_blocks_count);
|
||||
A(EXT2_SB_BSIZE_OFFSET, s_log_block_size);
|
||||
#undef A
|
||||
}
|
||||
|
||||
/*
|
||||
* ext2 mount options
|
||||
|
|
|
|||
|
|
@ -3,10 +3,7 @@
|
|||
* Handler for storing security labels as extended attributes.
|
||||
*/
|
||||
|
||||
#include <linux/slab.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/ext2_fs.h>
|
||||
#include "ext2.h"
|
||||
#include <linux/security.h>
|
||||
#include "xattr.h"
|
||||
|
||||
|
|
|
|||
|
|
@ -5,10 +5,7 @@
|
|||
* Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
||||
*/
|
||||
|
||||
#include <linux/string.h>
|
||||
#include <linux/capability.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/ext2_fs.h>
|
||||
#include "ext2.h"
|
||||
#include "xattr.h"
|
||||
|
||||
static size_t
|
||||
|
|
|
|||
|
|
@ -9,8 +9,6 @@
|
|||
#include <linux/fs.h>
|
||||
#include <linux/genhd.h>
|
||||
#include <linux/buffer_head.h>
|
||||
#include <linux/ext2_fs_sb.h>
|
||||
#include <linux/ext2_fs.h>
|
||||
#include <linux/blkdev.h>
|
||||
#include "ext2.h"
|
||||
#include "xip.h"
|
||||
|
|
|
|||
|
|
@ -18,524 +18,14 @@
|
|||
|
||||
#include <linux/types.h>
|
||||
#include <linux/magic.h>
|
||||
#include <linux/fs.h>
|
||||
|
||||
#include <linux/ext2_fs_sb.h>
|
||||
|
||||
/*
|
||||
* The second extended filesystem constants/structures
|
||||
*/
|
||||
|
||||
/*
|
||||
* Define EXT2FS_DEBUG to produce debug messages
|
||||
*/
|
||||
#undef EXT2FS_DEBUG
|
||||
|
||||
/*
|
||||
* Define EXT2_RESERVATION to reserve data blocks for expanding files
|
||||
*/
|
||||
#define EXT2_DEFAULT_RESERVE_BLOCKS 8
|
||||
/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
|
||||
#define EXT2_MAX_RESERVE_BLOCKS 1027
|
||||
#define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
|
||||
/*
|
||||
* The second extended file system version
|
||||
*/
|
||||
#define EXT2FS_DATE "95/08/09"
|
||||
#define EXT2FS_VERSION "0.5b"
|
||||
|
||||
/*
|
||||
* Debug code
|
||||
*/
|
||||
#ifdef EXT2FS_DEBUG
|
||||
# define ext2_debug(f, a...) { \
|
||||
printk ("EXT2-fs DEBUG (%s, %d): %s:", \
|
||||
__FILE__, __LINE__, __func__); \
|
||||
printk (f, ## a); \
|
||||
}
|
||||
#else
|
||||
# define ext2_debug(f, a...) /**/
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Special inode numbers
|
||||
*/
|
||||
#define EXT2_BAD_INO 1 /* Bad blocks inode */
|
||||
#define EXT2_ROOT_INO 2 /* Root inode */
|
||||
#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
|
||||
#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
|
||||
|
||||
/* First non-reserved inode for old ext2 filesystems */
|
||||
#define EXT2_GOOD_OLD_FIRST_INO 11
|
||||
|
||||
static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
|
||||
{
|
||||
return sb->s_fs_info;
|
||||
}
|
||||
#define EXT2_NAME_LEN 255
|
||||
|
||||
/*
|
||||
* Maximal count of links to a file
|
||||
*/
|
||||
#define EXT2_LINK_MAX 32000
|
||||
|
||||
/*
|
||||
* Macro-instructions used to manage several block sizes
|
||||
*/
|
||||
#define EXT2_MIN_BLOCK_SIZE 1024
|
||||
#define EXT2_MAX_BLOCK_SIZE 4096
|
||||
#define EXT2_MIN_BLOCK_LOG_SIZE 10
|
||||
#define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
|
||||
#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
|
||||
#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
|
||||
#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
|
||||
#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size)
|
||||
#define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino)
|
||||
|
||||
/*
|
||||
* Macro-instructions used to manage fragments
|
||||
*/
|
||||
#define EXT2_MIN_FRAG_SIZE 1024
|
||||
#define EXT2_MAX_FRAG_SIZE 4096
|
||||
#define EXT2_MIN_FRAG_LOG_SIZE 10
|
||||
#define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size)
|
||||
#define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block)
|
||||
|
||||
/*
|
||||
* Structure of a blocks group descriptor
|
||||
*/
|
||||
struct ext2_group_desc
|
||||
{
|
||||
__le32 bg_block_bitmap; /* Blocks bitmap block */
|
||||
__le32 bg_inode_bitmap; /* Inodes bitmap block */
|
||||
__le32 bg_inode_table; /* Inodes table block */
|
||||
__le16 bg_free_blocks_count; /* Free blocks count */
|
||||
__le16 bg_free_inodes_count; /* Free inodes count */
|
||||
__le16 bg_used_dirs_count; /* Directories count */
|
||||
__le16 bg_pad;
|
||||
__le32 bg_reserved[3];
|
||||
};
|
||||
|
||||
/*
|
||||
* Macro-instructions used to manage group descriptors
|
||||
*/
|
||||
#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
|
||||
#define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block)
|
||||
#define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
|
||||
#define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
|
||||
|
||||
/*
|
||||
* Constants relative to the data blocks
|
||||
*/
|
||||
#define EXT2_NDIR_BLOCKS 12
|
||||
#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
|
||||
#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
|
||||
#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
|
||||
#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
|
||||
|
||||
/*
|
||||
* Inode flags (GETFLAGS/SETFLAGS)
|
||||
*/
|
||||
#define EXT2_SECRM_FL FS_SECRM_FL /* Secure deletion */
|
||||
#define EXT2_UNRM_FL FS_UNRM_FL /* Undelete */
|
||||
#define EXT2_COMPR_FL FS_COMPR_FL /* Compress file */
|
||||
#define EXT2_SYNC_FL FS_SYNC_FL /* Synchronous updates */
|
||||
#define EXT2_IMMUTABLE_FL FS_IMMUTABLE_FL /* Immutable file */
|
||||
#define EXT2_APPEND_FL FS_APPEND_FL /* writes to file may only append */
|
||||
#define EXT2_NODUMP_FL FS_NODUMP_FL /* do not dump file */
|
||||
#define EXT2_NOATIME_FL FS_NOATIME_FL /* do not update atime */
|
||||
/* Reserved for compression usage... */
|
||||
#define EXT2_DIRTY_FL FS_DIRTY_FL
|
||||
#define EXT2_COMPRBLK_FL FS_COMPRBLK_FL /* One or more compressed clusters */
|
||||
#define EXT2_NOCOMP_FL FS_NOCOMP_FL /* Don't compress */
|
||||
#define EXT2_ECOMPR_FL FS_ECOMPR_FL /* Compression error */
|
||||
/* End compression flags --- maybe not all used */
|
||||
#define EXT2_BTREE_FL FS_BTREE_FL /* btree format dir */
|
||||
#define EXT2_INDEX_FL FS_INDEX_FL /* hash-indexed directory */
|
||||
#define EXT2_IMAGIC_FL FS_IMAGIC_FL /* AFS directory */
|
||||
#define EXT2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL /* Reserved for ext3 */
|
||||
#define EXT2_NOTAIL_FL FS_NOTAIL_FL /* file tail should not be merged */
|
||||
#define EXT2_DIRSYNC_FL FS_DIRSYNC_FL /* dirsync behaviour (directories only) */
|
||||
#define EXT2_TOPDIR_FL FS_TOPDIR_FL /* Top of directory hierarchies*/
|
||||
#define EXT2_RESERVED_FL FS_RESERVED_FL /* reserved for ext2 lib */
|
||||
|
||||
#define EXT2_FL_USER_VISIBLE FS_FL_USER_VISIBLE /* User visible flags */
|
||||
#define EXT2_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE /* User modifiable flags */
|
||||
|
||||
/* Flags that should be inherited by new inodes from their parent. */
|
||||
#define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\
|
||||
EXT2_SYNC_FL | EXT2_NODUMP_FL |\
|
||||
EXT2_NOATIME_FL | EXT2_COMPRBLK_FL |\
|
||||
EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\
|
||||
EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL)
|
||||
|
||||
/* Flags that are appropriate for regular files (all but dir-specific ones). */
|
||||
#define EXT2_REG_FLMASK (~(EXT2_DIRSYNC_FL | EXT2_TOPDIR_FL))
|
||||
|
||||
/* Flags that are appropriate for non-directories/regular files. */
|
||||
#define EXT2_OTHER_FLMASK (EXT2_NODUMP_FL | EXT2_NOATIME_FL)
|
||||
|
||||
/* Mask out flags that are inappropriate for the given type of inode. */
|
||||
static inline __u32 ext2_mask_flags(umode_t mode, __u32 flags)
|
||||
{
|
||||
if (S_ISDIR(mode))
|
||||
return flags;
|
||||
else if (S_ISREG(mode))
|
||||
return flags & EXT2_REG_FLMASK;
|
||||
else
|
||||
return flags & EXT2_OTHER_FLMASK;
|
||||
}
|
||||
|
||||
/*
|
||||
* ioctl commands
|
||||
*/
|
||||
#define EXT2_IOC_GETFLAGS FS_IOC_GETFLAGS
|
||||
#define EXT2_IOC_SETFLAGS FS_IOC_SETFLAGS
|
||||
#define EXT2_IOC_GETVERSION FS_IOC_GETVERSION
|
||||
#define EXT2_IOC_SETVERSION FS_IOC_SETVERSION
|
||||
#define EXT2_IOC_GETRSVSZ _IOR('f', 5, long)
|
||||
#define EXT2_IOC_SETRSVSZ _IOW('f', 6, long)
|
||||
|
||||
/*
|
||||
* ioctl commands in 32 bit emulation
|
||||
*/
|
||||
#define EXT2_IOC32_GETFLAGS FS_IOC32_GETFLAGS
|
||||
#define EXT2_IOC32_SETFLAGS FS_IOC32_SETFLAGS
|
||||
#define EXT2_IOC32_GETVERSION FS_IOC32_GETVERSION
|
||||
#define EXT2_IOC32_SETVERSION FS_IOC32_SETVERSION
|
||||
|
||||
/*
|
||||
* Structure of an inode on the disk
|
||||
*/
|
||||
struct ext2_inode {
|
||||
__le16 i_mode; /* File mode */
|
||||
__le16 i_uid; /* Low 16 bits of Owner Uid */
|
||||
__le32 i_size; /* Size in bytes */
|
||||
__le32 i_atime; /* Access time */
|
||||
__le32 i_ctime; /* Creation time */
|
||||
__le32 i_mtime; /* Modification time */
|
||||
__le32 i_dtime; /* Deletion Time */
|
||||
__le16 i_gid; /* Low 16 bits of Group Id */
|
||||
__le16 i_links_count; /* Links count */
|
||||
__le32 i_blocks; /* Blocks count */
|
||||
__le32 i_flags; /* File flags */
|
||||
union {
|
||||
struct {
|
||||
__le32 l_i_reserved1;
|
||||
} linux1;
|
||||
struct {
|
||||
__le32 h_i_translator;
|
||||
} hurd1;
|
||||
struct {
|
||||
__le32 m_i_reserved1;
|
||||
} masix1;
|
||||
} osd1; /* OS dependent 1 */
|
||||
__le32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
|
||||
__le32 i_generation; /* File version (for NFS) */
|
||||
__le32 i_file_acl; /* File ACL */
|
||||
__le32 i_dir_acl; /* Directory ACL */
|
||||
__le32 i_faddr; /* Fragment address */
|
||||
union {
|
||||
struct {
|
||||
__u8 l_i_frag; /* Fragment number */
|
||||
__u8 l_i_fsize; /* Fragment size */
|
||||
__u16 i_pad1;
|
||||
__le16 l_i_uid_high; /* these 2 fields */
|
||||
__le16 l_i_gid_high; /* were reserved2[0] */
|
||||
__u32 l_i_reserved2;
|
||||
} linux2;
|
||||
struct {
|
||||
__u8 h_i_frag; /* Fragment number */
|
||||
__u8 h_i_fsize; /* Fragment size */
|
||||
__le16 h_i_mode_high;
|
||||
__le16 h_i_uid_high;
|
||||
__le16 h_i_gid_high;
|
||||
__le32 h_i_author;
|
||||
} hurd2;
|
||||
struct {
|
||||
__u8 m_i_frag; /* Fragment number */
|
||||
__u8 m_i_fsize; /* Fragment size */
|
||||
__u16 m_pad1;
|
||||
__u32 m_i_reserved2[2];
|
||||
} masix2;
|
||||
} osd2; /* OS dependent 2 */
|
||||
};
|
||||
|
||||
#define i_size_high i_dir_acl
|
||||
|
||||
#define i_reserved1 osd1.linux1.l_i_reserved1
|
||||
#define i_frag osd2.linux2.l_i_frag
|
||||
#define i_fsize osd2.linux2.l_i_fsize
|
||||
#define i_uid_low i_uid
|
||||
#define i_gid_low i_gid
|
||||
#define i_uid_high osd2.linux2.l_i_uid_high
|
||||
#define i_gid_high osd2.linux2.l_i_gid_high
|
||||
#define i_reserved2 osd2.linux2.l_i_reserved2
|
||||
|
||||
/*
|
||||
* File system states
|
||||
*/
|
||||
#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
|
||||
#define EXT2_ERROR_FS 0x0002 /* Errors detected */
|
||||
|
||||
/*
|
||||
* Mount flags
|
||||
*/
|
||||
#define EXT2_MOUNT_CHECK 0x000001 /* Do mount-time checks */
|
||||
#define EXT2_MOUNT_OLDALLOC 0x000002 /* Don't use the new Orlov allocator */
|
||||
#define EXT2_MOUNT_GRPID 0x000004 /* Create files with directory's group */
|
||||
#define EXT2_MOUNT_DEBUG 0x000008 /* Some debugging messages */
|
||||
#define EXT2_MOUNT_ERRORS_CONT 0x000010 /* Continue on errors */
|
||||
#define EXT2_MOUNT_ERRORS_RO 0x000020 /* Remount fs ro on errors */
|
||||
#define EXT2_MOUNT_ERRORS_PANIC 0x000040 /* Panic on errors */
|
||||
#define EXT2_MOUNT_MINIX_DF 0x000080 /* Mimics the Minix statfs */
|
||||
#define EXT2_MOUNT_NOBH 0x000100 /* No buffer_heads */
|
||||
#define EXT2_MOUNT_NO_UID32 0x000200 /* Disable 32-bit UIDs */
|
||||
#define EXT2_MOUNT_XATTR_USER 0x004000 /* Extended user attributes */
|
||||
#define EXT2_MOUNT_POSIX_ACL 0x008000 /* POSIX Access Control Lists */
|
||||
#define EXT2_MOUNT_XIP 0x010000 /* Execute in place */
|
||||
#define EXT2_MOUNT_USRQUOTA 0x020000 /* user quota */
|
||||
#define EXT2_MOUNT_GRPQUOTA 0x040000 /* group quota */
|
||||
#define EXT2_MOUNT_RESERVATION 0x080000 /* Preallocation */
|
||||
|
||||
|
||||
#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
|
||||
#define set_opt(o, opt) o |= EXT2_MOUNT_##opt
|
||||
#define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \
|
||||
EXT2_MOUNT_##opt)
|
||||
/*
|
||||
* Maximal mount counts between two filesystem checks
|
||||
*/
|
||||
#define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
|
||||
#define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
|
||||
|
||||
/*
|
||||
* Behaviour when detecting errors
|
||||
*/
|
||||
#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
|
||||
#define EXT2_ERRORS_RO 2 /* Remount fs read-only */
|
||||
#define EXT2_ERRORS_PANIC 3 /* Panic */
|
||||
#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
|
||||
|
||||
/*
|
||||
* Structure of the super block
|
||||
*/
|
||||
struct ext2_super_block {
|
||||
__le32 s_inodes_count; /* Inodes count */
|
||||
__le32 s_blocks_count; /* Blocks count */
|
||||
__le32 s_r_blocks_count; /* Reserved blocks count */
|
||||
__le32 s_free_blocks_count; /* Free blocks count */
|
||||
__le32 s_free_inodes_count; /* Free inodes count */
|
||||
__le32 s_first_data_block; /* First Data Block */
|
||||
__le32 s_log_block_size; /* Block size */
|
||||
__le32 s_log_frag_size; /* Fragment size */
|
||||
__le32 s_blocks_per_group; /* # Blocks per group */
|
||||
__le32 s_frags_per_group; /* # Fragments per group */
|
||||
__le32 s_inodes_per_group; /* # Inodes per group */
|
||||
__le32 s_mtime; /* Mount time */
|
||||
__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 */
|
||||
__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 */
|
||||
__le16 s_def_resuid; /* Default uid for reserved blocks */
|
||||
__le16 s_def_resgid; /* Default gid for reserved blocks */
|
||||
/*
|
||||
* These fields are for EXT2_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 */
|
||||
__le32 s_feature_incompat; /* incompatible feature set */
|
||||
__le32 s_feature_ro_compat; /* readonly-compatible feature set */
|
||||
__u8 s_uuid[16]; /* 128-bit uuid for volume */
|
||||
char s_volume_name[16]; /* volume name */
|
||||
char s_last_mounted[64]; /* directory where last mounted */
|
||||
__le32 s_algorithm_usage_bitmap; /* For compression */
|
||||
/*
|
||||
* Performance hints. Directory preallocation should only
|
||||
* happen if the EXT2_COMPAT_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_padding1;
|
||||
/*
|
||||
* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
|
||||
*/
|
||||
__u8 s_journal_uuid[16]; /* uuid of journal superblock */
|
||||
__u32 s_journal_inum; /* inode number of journal file */
|
||||
__u32 s_journal_dev; /* device number of journal file */
|
||||
__u32 s_last_orphan; /* start of list of inodes to delete */
|
||||
__u32 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 */
|
||||
};
|
||||
|
||||
/*
|
||||
* Codes for operating systems
|
||||
*/
|
||||
#define EXT2_OS_LINUX 0
|
||||
#define EXT2_OS_HURD 1
|
||||
#define EXT2_OS_MASIX 2
|
||||
#define EXT2_OS_FREEBSD 3
|
||||
#define EXT2_OS_LITES 4
|
||||
|
||||
/*
|
||||
* Revision levels
|
||||
*/
|
||||
#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */
|
||||
#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
|
||||
|
||||
#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
|
||||
#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
|
||||
|
||||
#define EXT2_GOOD_OLD_INODE_SIZE 128
|
||||
|
||||
/*
|
||||
* Feature set definitions
|
||||
*/
|
||||
|
||||
#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
|
||||
( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
|
||||
#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
|
||||
( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
|
||||
#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
|
||||
( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
|
||||
#define EXT2_SET_COMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
|
||||
#define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
|
||||
#define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
|
||||
#define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
|
||||
#define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
|
||||
#define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
|
||||
EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
|
||||
|
||||
#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
|
||||
#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
|
||||
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
|
||||
#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
|
||||
#define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
|
||||
#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
|
||||
#define EXT2_FEATURE_COMPAT_ANY 0xffffffff
|
||||
|
||||
#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
|
||||
#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
|
||||
#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
|
||||
#define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
|
||||
|
||||
#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
|
||||
#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
|
||||
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
|
||||
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
|
||||
#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
|
||||
#define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff
|
||||
|
||||
#define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
|
||||
#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
|
||||
EXT2_FEATURE_INCOMPAT_META_BG)
|
||||
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
|
||||
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
|
||||
EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
|
||||
#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
|
||||
#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
|
||||
|
||||
/*
|
||||
* Default values for user and/or group using reserved blocks
|
||||
*/
|
||||
#define EXT2_DEF_RESUID 0
|
||||
#define EXT2_DEF_RESGID 0
|
||||
|
||||
/*
|
||||
* Default mount options
|
||||
*/
|
||||
#define EXT2_DEFM_DEBUG 0x0001
|
||||
#define EXT2_DEFM_BSDGROUPS 0x0002
|
||||
#define EXT2_DEFM_XATTR_USER 0x0004
|
||||
#define EXT2_DEFM_ACL 0x0008
|
||||
#define EXT2_DEFM_UID16 0x0010
|
||||
/* Not used by ext2, but reserved for use by ext3 */
|
||||
#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 EXT2_NAME_LEN 255
|
||||
|
||||
struct ext2_dir_entry {
|
||||
__le32 inode; /* Inode number */
|
||||
__le16 rec_len; /* Directory entry length */
|
||||
__le16 name_len; /* Name length */
|
||||
char name[EXT2_NAME_LEN]; /* File name */
|
||||
};
|
||||
|
||||
/*
|
||||
* The new version of the directory entry. Since EXT2 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 ext2_dir_entry_2 {
|
||||
__le32 inode; /* Inode number */
|
||||
__le16 rec_len; /* Directory entry length */
|
||||
__u8 name_len; /* Name length */
|
||||
__u8 file_type;
|
||||
char name[EXT2_NAME_LEN]; /* File name */
|
||||
};
|
||||
|
||||
/*
|
||||
* Ext2 directory file types. Only the low 3 bits are used. The
|
||||
* other bits are reserved for now.
|
||||
*/
|
||||
enum {
|
||||
EXT2_FT_UNKNOWN = 0,
|
||||
EXT2_FT_REG_FILE = 1,
|
||||
EXT2_FT_DIR = 2,
|
||||
EXT2_FT_CHRDEV = 3,
|
||||
EXT2_FT_BLKDEV = 4,
|
||||
EXT2_FT_FIFO = 5,
|
||||
EXT2_FT_SOCK = 6,
|
||||
EXT2_FT_SYMLINK = 7,
|
||||
EXT2_FT_MAX
|
||||
};
|
||||
|
||||
/*
|
||||
* EXT2_DIR_PAD defines the directory entries boundaries
|
||||
*
|
||||
* NOTE: It must be a multiple of 4
|
||||
*/
|
||||
#define EXT2_DIR_PAD 4
|
||||
#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
|
||||
#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
|
||||
~EXT2_DIR_ROUND)
|
||||
#define EXT2_MAX_REC_LEN ((1<<16)-1)
|
||||
|
||||
#define EXT2_SB_MAGIC_OFFSET 0x38
|
||||
#define EXT2_SB_BLOCKS_OFFSET 0x04
|
||||
#define EXT2_SB_BSIZE_OFFSET 0x18
|
||||
|
|
@ -549,13 +39,4 @@ static inline u64 ext2_image_size(void *ext2_sb)
|
|||
le32_to_cpup((__le32 *)(p + EXT2_SB_BSIZE_OFFSET));
|
||||
}
|
||||
|
||||
static inline void verify_offsets(void)
|
||||
{
|
||||
#define A(x,y) BUILD_BUG_ON(x != offsetof(struct ext2_super_block, y));
|
||||
A(EXT2_SB_MAGIC_OFFSET, s_magic);
|
||||
A(EXT2_SB_BLOCKS_OFFSET, s_blocks_count);
|
||||
A(EXT2_SB_BSIZE_OFFSET, s_log_block_size);
|
||||
#undef A
|
||||
}
|
||||
|
||||
#endif /* _LINUX_EXT2_FS_H */
|
||||
|
|
|
|||
|
|
@ -1,126 +0,0 @@
|
|||
/*
|
||||
* linux/include/linux/ext2_fs_sb.h
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/include/linux/minix_fs_sb.h
|
||||
*
|
||||
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_EXT2_FS_SB
|
||||
#define _LINUX_EXT2_FS_SB
|
||||
|
||||
#include <linux/blockgroup_lock.h>
|
||||
#include <linux/percpu_counter.h>
|
||||
#include <linux/rbtree.h>
|
||||
|
||||
/* XXX Here for now... not interested in restructing headers JUST now */
|
||||
|
||||
/* data type for block offset of block group */
|
||||
typedef int ext2_grpblk_t;
|
||||
|
||||
/* data type for filesystem-wide blocks number */
|
||||
typedef unsigned long ext2_fsblk_t;
|
||||
|
||||
#define E2FSBLK "%lu"
|
||||
|
||||
struct ext2_reserve_window {
|
||||
ext2_fsblk_t _rsv_start; /* First byte reserved */
|
||||
ext2_fsblk_t _rsv_end; /* Last byte reserved or 0 */
|
||||
};
|
||||
|
||||
struct ext2_reserve_window_node {
|
||||
struct rb_node rsv_node;
|
||||
__u32 rsv_goal_size;
|
||||
__u32 rsv_alloc_hit;
|
||||
struct ext2_reserve_window rsv_window;
|
||||
};
|
||||
|
||||
struct ext2_block_alloc_info {
|
||||
/* information about reservation window */
|
||||
struct ext2_reserve_window_node rsv_window_node;
|
||||
/*
|
||||
* was i_next_alloc_block in ext2_inode_info
|
||||
* is the logical (file-relative) number of the
|
||||
* most-recently-allocated block in this file.
|
||||
* We use this for detecting linearly ascending allocation requests.
|
||||
*/
|
||||
__u32 last_alloc_logical_block;
|
||||
/*
|
||||
* Was i_next_alloc_goal in ext2_inode_info
|
||||
* is the *physical* companion to i_next_alloc_block.
|
||||
* it the the physical block number of the block which was most-recentl
|
||||
* allocated to this file. This give us the goal (target) for the next
|
||||
* allocation when we detect linearly ascending requests.
|
||||
*/
|
||||
ext2_fsblk_t last_alloc_physical_block;
|
||||
};
|
||||
|
||||
#define rsv_start rsv_window._rsv_start
|
||||
#define rsv_end rsv_window._rsv_end
|
||||
|
||||
/*
|
||||
* second extended-fs super-block data in memory
|
||||
*/
|
||||
struct ext2_sb_info {
|
||||
unsigned long s_frag_size; /* Size of a fragment in bytes */
|
||||
unsigned long s_frags_per_block;/* Number of fragments per block */
|
||||
unsigned long s_inodes_per_block;/* Number of inodes per block */
|
||||
unsigned long s_frags_per_group;/* Number of fragments in a group */
|
||||
unsigned long s_blocks_per_group;/* Number of blocks in a group */
|
||||
unsigned long s_inodes_per_group;/* Number of inodes in a group */
|
||||
unsigned long s_itb_per_group; /* Number of inode table blocks per group */
|
||||
unsigned long s_gdb_count; /* Number of group descriptor blocks */
|
||||
unsigned long s_desc_per_block; /* Number of group descriptors per block */
|
||||
unsigned long s_groups_count; /* Number of groups in the fs */
|
||||
unsigned long s_overhead_last; /* Last calculated overhead */
|
||||
unsigned long s_blocks_last; /* Last seen block count */
|
||||
struct buffer_head * s_sbh; /* Buffer containing the super block */
|
||||
struct ext2_super_block * s_es; /* Pointer to the super block in the buffer */
|
||||
struct buffer_head ** s_group_desc;
|
||||
unsigned long s_mount_opt;
|
||||
unsigned long s_sb_block;
|
||||
uid_t s_resuid;
|
||||
gid_t s_resgid;
|
||||
unsigned short s_mount_state;
|
||||
unsigned short s_pad;
|
||||
int s_addr_per_block_bits;
|
||||
int s_desc_per_block_bits;
|
||||
int s_inode_size;
|
||||
int s_first_ino;
|
||||
spinlock_t s_next_gen_lock;
|
||||
u32 s_next_generation;
|
||||
unsigned long s_dir_count;
|
||||
u8 *s_debts;
|
||||
struct percpu_counter s_freeblocks_counter;
|
||||
struct percpu_counter s_freeinodes_counter;
|
||||
struct percpu_counter s_dirs_counter;
|
||||
struct blockgroup_lock *s_blockgroup_lock;
|
||||
/* root of the per fs reservation window tree */
|
||||
spinlock_t s_rsv_window_lock;
|
||||
struct rb_root s_rsv_window_root;
|
||||
struct ext2_reserve_window_node s_rsv_window_head;
|
||||
/*
|
||||
* s_lock protects against concurrent modifications of s_mount_state,
|
||||
* s_blocks_last, s_overhead_last and the content of superblock's
|
||||
* buffer pointed to by sbi->s_es.
|
||||
*
|
||||
* Note: It is used in ext2_show_options() to provide a consistent view
|
||||
* of the mount options.
|
||||
*/
|
||||
spinlock_t s_lock;
|
||||
};
|
||||
|
||||
static inline spinlock_t *
|
||||
sb_bgl_lock(struct ext2_sb_info *sbi, unsigned int block_group)
|
||||
{
|
||||
return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group);
|
||||
}
|
||||
|
||||
#endif /* _LINUX_EXT2_FS_SB */
|
||||
Loading…
Reference in New Issue