1997-04-26 17:58:21 +04:00
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/*
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* dirblock.c --- directory block routines.
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2008-08-28 07:07:54 +04:00
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*
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1997-04-29 20:15:03 +04:00
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* Copyright (C) 1995, 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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1997-04-26 17:58:21 +04:00
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*/
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#include <stdio.h>
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1997-08-11 03:07:40 +04:00
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#if HAVE_UNISTD_H
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1997-04-26 17:58:21 +04:00
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#include <unistd.h>
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1997-08-11 03:07:40 +04:00
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#endif
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1997-04-29 20:15:03 +04:00
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#include <string.h>
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1997-04-26 17:58:21 +04:00
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#include <time.h>
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Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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#include "ext2_fs.h"
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1997-04-26 17:58:21 +04:00
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#include "ext2fs.h"
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2002-03-12 09:05:06 +03:00
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errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
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2003-12-07 09:28:50 +03:00
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void *buf, int flags EXT2FS_ATTR((unused)))
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1997-04-26 17:58:21 +04:00
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{
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errcode_t retval;
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char *p, *end;
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struct ext2_dir_entry *dirent;
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2007-08-11 09:56:48 +04:00
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unsigned int name_len, rec_len;
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2008-08-28 07:07:54 +04:00
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1997-04-26 17:58:21 +04:00
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retval = io_channel_read_blk(fs->io, block, 1, buf);
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if (retval)
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return retval;
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2007-08-11 09:56:48 +04:00
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Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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p = (char *) buf;
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1997-04-26 17:58:21 +04:00
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end = (char *) buf + fs->blocksize;
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2001-01-06 01:27:06 +03:00
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while (p < end-8) {
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2001-05-05 20:21:48 +04:00
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dirent = (struct ext2_dir_entry *) p;
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2007-08-11 09:56:48 +04:00
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#ifdef WORDS_BIGENDIAN
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dirent->inode = ext2fs_swab32(dirent->inode);
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dirent->rec_len = ext2fs_swab16(dirent->rec_len);
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dirent->name_len = ext2fs_swab16(dirent->name_len);
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2002-03-12 09:05:06 +03:00
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#endif
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name_len = dirent->name_len;
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#ifdef WORDS_BIGENDIAN
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if (flags & EXT2_DIRBLOCK_V2_STRUCT)
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dirent->name_len = ext2fs_swab16(dirent->name_len);
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ChangeLog, Makefile.in, swapfs.c, unix.c:
Makefile.in: Add message.c and swapfs.c to the list of source files to
build the make depend.
swapfs.c, unix.c: Only support the -s and -S options to e2fsck if
ENABLE_SWAPFS is defined.
Many files:
ext2fs.h, bitops.h, block.c, bmap.c, closefs.c, dirblock.c, inode.c,
native.c, openfs.c, rw_bitmaps.c, swapfs.c: Only include the
byte-swapping logic if ENABLE_SWAPFS is turned on or if we're on a
big-endian machine.
initialize.c (ext2fs_initialize):Use WORDS_BIGENDIAN directly to set
EXT2_FLAG_SWAP_BYTES, instead of using ext2fs_native_flag.
native.c (ext2fs_native_flag): Use WORDS_BIGENDIAN provided by
autoconf to determine whether or not return EXT2_FLAG_SWAP_BYTES.
2001-06-11 11:00:04 +04:00
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#endif
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2008-08-26 05:08:19 +04:00
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rec_len = (dirent->rec_len || fs->blocksize < 65536) ?
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dirent->rec_len : 65536;
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2001-05-05 09:12:14 +04:00
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if ((rec_len < 8) || (rec_len % 4)) {
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rec_len = 8;
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retval = EXT2_ET_DIR_CORRUPTED;
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2008-08-26 05:08:19 +04:00
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} else if (((name_len & 0xFF) + 8) > rec_len)
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2001-05-05 09:12:14 +04:00
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retval = EXT2_ET_DIR_CORRUPTED;
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p += rec_len;
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1997-04-26 17:58:21 +04:00
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}
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2001-05-05 09:12:14 +04:00
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return retval;
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1997-04-26 17:58:21 +04:00
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}
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2002-03-12 09:05:06 +03:00
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errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
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void *buf)
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1997-04-26 17:58:21 +04:00
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{
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2002-03-12 09:05:06 +03:00
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return ext2fs_read_dir_block2(fs, block, buf, 0);
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}
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errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
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2003-12-07 09:28:50 +03:00
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void *inbuf, int flags EXT2FS_ATTR((unused)))
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2002-03-12 09:05:06 +03:00
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{
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2007-08-11 09:56:48 +04:00
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#ifdef WORDS_BIGENDIAN
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1997-04-26 17:58:21 +04:00
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errcode_t retval;
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2002-03-12 09:05:06 +03:00
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char *p, *end;
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1997-04-26 17:58:21 +04:00
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char *buf = 0;
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2008-08-26 05:08:19 +04:00
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int rec_len;
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1997-04-26 17:58:21 +04:00
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struct ext2_dir_entry *dirent;
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2003-08-01 17:41:07 +04:00
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retval = ext2fs_get_mem(fs->blocksize, &buf);
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2002-03-12 09:05:06 +03:00
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if (retval)
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return retval;
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memcpy(buf, inbuf, fs->blocksize);
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p = buf;
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end = buf + fs->blocksize;
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while (p < end) {
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dirent = (struct ext2_dir_entry *) p;
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2008-08-26 05:08:19 +04:00
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rec_len = (dirent->rec_len || fs->blocksize < 65536) ?
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dirent->rec_len : 65536;
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if ((rec_len < 8) ||
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(rec_len % 4)) {
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2003-08-01 17:41:07 +04:00
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ext2fs_free_mem(&buf);
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2002-03-12 09:05:06 +03:00
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return (EXT2_ET_DIR_CORRUPTED);
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}
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2008-08-26 05:08:19 +04:00
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p += rec_len;
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2007-08-11 09:56:48 +04:00
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dirent->inode = ext2fs_swab32(dirent->inode);
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dirent->rec_len = ext2fs_swab16(dirent->rec_len);
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dirent->name_len = ext2fs_swab16(dirent->name_len);
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2002-03-12 09:05:06 +03:00
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if (flags & EXT2_DIRBLOCK_V2_STRUCT)
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dirent->name_len = ext2fs_swab16(dirent->name_len);
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}
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retval = io_channel_write_blk(fs->io, block, 1, buf);
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2003-08-01 17:41:07 +04:00
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ext2fs_free_mem(&buf);
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1997-04-26 17:58:21 +04:00
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return retval;
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2002-03-12 09:05:06 +03:00
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#else
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return io_channel_write_blk(fs->io, block, 1, (char *) inbuf);
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#endif
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1997-04-26 17:58:21 +04:00
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}
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2002-03-12 09:05:06 +03:00
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errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
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void *inbuf)
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{
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return ext2fs_write_dir_block2(fs, block, inbuf, 0);
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}
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