migrate ext2_fs.h guts to fs/ext2/ext2.h (f7699f2b) · Commits · EulixOS / Software / Kernel

fs/ext2/ext2.h

+631 −0

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		/*
		* Copyright (C) 1992, 1993, 1994, 1995
		* Remy Card (card@masi.ibp.fr)
		* Laboratoire MASI - Institut Blaise Pascal
		* Universite Pierre et Marie Curie (Paris VI)
		*
		* from
		*
		* linux/include/linux/minix_fs.h
		*
		* Copyright (C) 1991, 1992 Linus Torvalds
		*/
		#include <linux/fs.h>
		#include <linux/ext2_fs.h>
		#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);
		}

		/*
		* 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;
		}

		/*
		* 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
		*/

		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

fs/ext2/xattr_security.c

+1 −4

Original line number	Diff line number	Diff line
		@@ -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"

fs/ext2/xattr_trusted.c

+1 −4

Original line number	Diff line number	Diff line
		@@ -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

fs/ext2/xip.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -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"

include/linux/ext2_fs.h

+1 −520

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