There is an error in the Linux NTFS driver that shows up when reading very
large files, very fragmented files or directoryes with many entrys. The
patch below fixes the problem and below the patch is an
demonstration from my computer before and after the patch.
The credit for finding this solution should go to Artem Khodush
arte-@duma.gov.ru, I'm just trying to get it in to the main kernel.
--- fs/ntfs/inode.c.old Thu Jan 20 19:48:35 2000
+++ fs/ntfs/inode.c Sun Mar 19 14:40:55 2000
@@ -258,7 +258,7 @@
if( !buf )
return;
delta=0;
- for(offset=0;datasize;datasize-=len)
+ for(offset=0;datasize;datasize-=len,offset+=len)
{
ntfs_io io;
io.fn_put=ntfs_put;
@@ -268,7 +268,7 @@
if(ntfs_read_attr(ino,vol->at_attribute_list,0,offset,&io)){
ntfs_error("error in load_attributes\n");
}
- delta=len;
+ delta+=len;
parse_attributes(ino,buf,&delta);
if(delta)
/* move remaining bytes to buffer start */
root@vaino:~# l /mnt/INSTALL/NTWKS40/I386/WOWDEB.EX_
-r-------- 1 root root 48627 Sep 3 1996
/mnt/INSTALL/NTWKS40/I386/WOWDEB.EX_
root@vaino:~# l /mnt/INSTALL/NTWKS40/I386/WOWEXEC.EX_
?--------- 1 root root 0 Jan 1 1970
/mnt/INSTALL/NTWKS40/I386/WOWEXEC.EX_
root@vaino:~# cp /mnt/INSTALL/NTWKS40/I386/WOWDEB.EX_ /tmp
root@vaino:~# cp /mnt/INSTALL/NTWKS40/I386/WOWEXEC.EX_ /tmp
cp: /mnt/INSTALL/NTWKS40/I386/WOWEXEC.EX_: Invalid argument
root@vaino:~# umount /mnt
root@vaino:~# rmmod ntfs
root@vaino:~# insmod /Home/bbn/src/linux/linux-2.3.99-pre1/fs/ntfs/ntfs.o
root@vaino:~# mount -t ntfs -o ro /dev/hda1 /mnt
root@vaino:~# l /mnt/INSTALL/NTWKS40/I386/WOWDEB.EX_
-r-------- 1 root root 1224 Sep 3 1996
/mnt/INSTALL/NTWKS40/I386/WOWDEB.EX_
root@vaino:~# l /mnt/INSTALL/NTWKS40/I386/WOWEXEC.EX_
-r-------- 1 root root 5207 Sep 3 1996
/mnt/INSTALL/NTWKS40/I386/WOWEXEC.EX_
root@vaino:~# cp /mnt/INSTALL/NTWKS40/I386/WOWDEB.EX_ /tmp
cp: overwrite `/tmp/WOWDEB.EX_'? y
root@vaino:~# cp /mnt/INSTALL/NTWKS40/I386/WOWEXEC.EX_ /tmp
cp: overwrite `/tmp/WOWEXEC.EX_'? y
Bo Branten
-
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