Create and use our own copy of linux/ext2_fs.h
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
@@ -8,13 +8,7 @@
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*/
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#include "libbb.h"
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#include <linux/fs.h>
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/*
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* Work around linux/ext2_fs.h breakage.
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* See https://bugzilla.kernel.org/show_bug.cgi?id=42986.
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*/
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typedef mode_t bb__umode_t;
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#define umode_t bb__umode_t
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#include <linux/ext2_fs.h>
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#include "bb_linux_ext2_fs.h"
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// storage helpers
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char BUG_wrong_field_size(void);
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547
include/bb_linux_ext2_fs.h
Normal file
547
include/bb_linux_ext2_fs.h
Normal file
@@ -0,0 +1,547 @@
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/*
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* Work around linux/ext2_fs.h breakage.
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* linux/ext2_fs.h might be removed from future kernel header distribution.
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* See https://bugzilla.kernel.org/show_bug.cgi?id=42986
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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#ifndef BB_LINUX_EXT2_FS_H
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#define BB_LINUX_EXT2_FS_H
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/*
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* From linux/magic.h
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*/
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#define EXT2_SUPER_MAGIC 0xEF53
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#define EXT3_SUPER_MAGIC 0xEF53
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#define EXT4_SUPER_MAGIC 0xEF53
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/*
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* From linux/ext2_fs.h, with minor changes.
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*/
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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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/*
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* The second extended filesystem constants/structures
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*/
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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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* 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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/* Assume that user mode programs are passing in an ext2fs superblock, not
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* a kernel struct super_block. This will allow us to call the feature-test
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* macros from user land. */
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#define EXT2_SB(sb) (sb)
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/*
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* Maximal count of links to a file
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*/
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#define EXT2_LINK_MAX 32000
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/*
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* Macro-instructions used to manage several block sizes
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*/
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#define 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) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
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#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (uint32_t))
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# define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
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#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
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EXT2_GOOD_OLD_INODE_SIZE : \
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(s)->s_inode_size)
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#define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
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EXT2_GOOD_OLD_FIRST_INO : \
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(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_MIN_FRAG_SIZE << (s)->s_log_frag_size)
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# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
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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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uint32_t bg_block_bitmap; /* Blocks bitmap block */
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uint32_t bg_inode_bitmap; /* Inodes bitmap block */
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uint32_t bg_inode_table; /* Inodes table block */
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uint16_t bg_free_blocks_count; /* Free blocks count */
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uint16_t bg_free_inodes_count; /* Free inodes count */
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uint16_t bg_used_dirs_count; /* Directories count */
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uint16_t bg_pad;
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uint32_t 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) ((s)->s_blocks_per_group)
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# define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
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# define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
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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_IMMUTABLE_FL | EXT2_APPEND_FL |\
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EXT2_NODUMP_FL | 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 uint32_t ext2_mask_flags(mode_t mode, uint32_t 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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uint16_t i_mode; /* File mode */
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uint16_t i_uid; /* Low 16 bits of Owner Uid */
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uint32_t i_size; /* Size in bytes */
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uint32_t i_atime; /* Access time */
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uint32_t i_ctime; /* Creation time */
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uint32_t i_mtime; /* Modification time */
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uint32_t i_dtime; /* Deletion Time */
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uint16_t i_gid; /* Low 16 bits of Group Id */
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uint16_t i_links_count; /* Links count */
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uint32_t i_blocks; /* Blocks count */
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uint32_t i_flags; /* File flags */
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union {
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struct {
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uint32_t l_i_reserved1;
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} linux1;
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struct {
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uint32_t h_i_translator;
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} hurd1;
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struct {
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uint32_t m_i_reserved1;
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} masix1;
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} osd1; /* OS dependent 1 */
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uint32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
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uint32_t i_generation; /* File version (for NFS) */
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uint32_t i_file_acl; /* File ACL */
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uint32_t i_dir_acl; /* Directory ACL */
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uint32_t i_faddr; /* Fragment address */
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union {
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struct {
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uint8_t l_i_frag; /* Fragment number */
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uint8_t l_i_fsize; /* Fragment size */
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uint16_t i_pad1;
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uint16_t l_i_uid_high; /* these 2 fields */
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uint16_t l_i_gid_high; /* were reserved2[0] */
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uint32_t l_i_reserved2;
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} linux2;
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struct {
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uint8_t h_i_frag; /* Fragment number */
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uint8_t h_i_fsize; /* Fragment size */
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uint16_t h_i_mode_high;
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uint16_t h_i_uid_high;
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uint16_t h_i_gid_high;
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uint32_t h_i_author;
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} hurd2;
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struct {
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uint8_t m_i_frag; /* Fragment number */
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uint8_t m_i_fsize; /* Fragment size */
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uint16_t m_pad1;
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uint32_t 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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#if defined(__KERNEL__) || defined(__linux__)
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#define i_reserved1 osd1.linux1.l_i_reserved1
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#define i_frag osd2.linux2.l_i_frag
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#define i_fsize osd2.linux2.l_i_fsize
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#define i_uid_low i_uid
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#define i_gid_low i_gid
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#define i_uid_high osd2.linux2.l_i_uid_high
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#define i_gid_high osd2.linux2.l_i_gid_high
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#define i_reserved2 osd2.linux2.l_i_reserved2
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#endif
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#ifdef __hurd__
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#define i_translator osd1.hurd1.h_i_translator
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#define i_frag osd2.hurd2.h_i_frag
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#define i_fsize osd2.hurd2.h_i_fsize
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#define i_uid_high osd2.hurd2.h_i_uid_high
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#define i_gid_high osd2.hurd2.h_i_gid_high
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#define i_author osd2.hurd2.h_i_author
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#endif
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#ifdef __masix__
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#define i_reserved1 osd1.masix1.m_i_reserved1
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#define i_frag osd2.masix2.m_i_frag
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#define i_fsize osd2.masix2.m_i_fsize
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#define i_reserved2 osd2.masix2.m_i_reserved2
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#endif
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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 */
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/*
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* Behaviour when detecting errors
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*/
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#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
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#define EXT2_ERRORS_RO 2 /* Remount fs read-only */
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#define EXT2_ERRORS_PANIC 3 /* Panic */
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#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
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/*
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* Structure of the super block
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*/
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struct ext2_super_block {
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uint32_t s_inodes_count; /* Inodes count */
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uint32_t s_blocks_count; /* Blocks count */
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uint32_t s_r_blocks_count; /* Reserved blocks count */
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uint32_t s_free_blocks_count; /* Free blocks count */
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uint32_t s_free_inodes_count; /* Free inodes count */
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uint32_t s_first_data_block; /* First Data Block */
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uint32_t s_log_block_size; /* Block size */
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uint32_t s_log_frag_size; /* Fragment size */
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uint32_t s_blocks_per_group; /* # Blocks per group */
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uint32_t s_frags_per_group; /* # Fragments per group */
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uint32_t s_inodes_per_group; /* # Inodes per group */
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uint32_t s_mtime; /* Mount time */
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uint32_t s_wtime; /* Write time */
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uint16_t s_mnt_count; /* Mount count */
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uint16_t s_max_mnt_count; /* Maximal mount count */
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uint16_t s_magic; /* Magic signature */
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uint16_t s_state; /* File system state */
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uint16_t s_errors; /* Behaviour when detecting errors */
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uint16_t s_minor_rev_level; /* minor revision level */
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uint32_t s_lastcheck; /* time of last check */
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uint32_t s_checkinterval; /* max. time between checks */
|
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uint32_t s_creator_os; /* OS */
|
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uint32_t s_rev_level; /* Revision level */
|
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uint16_t s_def_resuid; /* Default uid for reserved blocks */
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uint16_t s_def_resgid; /* Default gid for reserved blocks */
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/*
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* These fields are for EXT2_DYNAMIC_REV superblocks only.
|
||||
*
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||||
* Note: the difference between the compatible feature set and
|
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* the incompatible feature set is that if there is a bit set
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* in the incompatible feature set that the kernel doesn't
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* know about, it should refuse to mount the filesystem.
|
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*
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* 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...
|
||||
*/
|
||||
uint32_t s_first_ino; /* First non-reserved inode */
|
||||
uint16_t s_inode_size; /* size of inode structure */
|
||||
uint16_t s_block_group_nr; /* block group # of this superblock */
|
||||
uint32_t s_feature_compat; /* compatible feature set */
|
||||
uint32_t s_feature_incompat; /* incompatible feature set */
|
||||
uint32_t s_feature_ro_compat; /* readonly-compatible feature set */
|
||||
uint8_t s_uuid[16]; /* 128-bit uuid for volume */
|
||||
char s_volume_name[16]; /* volume name */
|
||||
char s_last_mounted[64]; /* directory where last mounted */
|
||||
uint32_t s_algorithm_usage_bitmap; /* For compression */
|
||||
/*
|
||||
* Performance hints. Directory preallocation should only
|
||||
* happen if the EXT2_COMPAT_PREALLOC flag is on.
|
||||
*/
|
||||
uint8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
|
||||
uint8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
|
||||
uint16_t s_padding1;
|
||||
/*
|
||||
* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
|
||||
*/
|
||||
uint8_t s_journal_uuid[16]; /* uuid of journal superblock */
|
||||
uint32_t s_journal_inum; /* inode number of journal file */
|
||||
uint32_t s_journal_dev; /* device number of journal file */
|
||||
uint32_t s_last_orphan; /* start of list of inodes to delete */
|
||||
uint32_t s_hash_seed[4]; /* HTREE hash seed */
|
||||
uint8_t s_def_hash_version; /* Default hash version to use */
|
||||
uint8_t s_reserved_char_pad;
|
||||
uint16_t s_reserved_word_pad;
|
||||
uint32_t s_default_mount_opts;
|
||||
uint32_t s_first_meta_bg; /* First metablock block group */
|
||||
uint32_t 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 {
|
||||
uint32_t inode; /* Inode number */
|
||||
uint16_t rec_len; /* Directory entry length */
|
||||
uint16_t 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 {
|
||||
uint32_t inode; /* Inode number */
|
||||
uint16_t rec_len; /* Directory entry length */
|
||||
uint8_t name_len; /* Name length */
|
||||
uint8_t 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)
|
||||
|
||||
#endif
|
||||
@@ -48,13 +48,7 @@
|
||||
|
||||
#include "libbb.h"
|
||||
#include <linux/fs.h>
|
||||
/*
|
||||
* Work around linux/ext2_fs.h breakage.
|
||||
* See https://bugzilla.kernel.org/show_bug.cgi?id=42986.
|
||||
*/
|
||||
typedef mode_t bb__umode_t;
|
||||
#define umode_t bb__umode_t
|
||||
#include <linux/ext2_fs.h>
|
||||
#include "bb_linux_ext2_fs.h"
|
||||
|
||||
#define ENABLE_FEATURE_MKFS_EXT2_RESERVED_GDT 0
|
||||
#define ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX 1
|
||||
|
||||
Reference in New Issue
Block a user