Re: Files > 2GB and 3.6 version (after converting from 3.5)

["Vladimir V. Saveliev" <vs@namesys.com>]

Hello

On Monday 18 September 2006 01:20, Pawel Jagoda wrote:
> > Hello
> >
> > On Saturday 16 September 2006 16:25, Pawel Jagoda wrote:
> >> Hello.
> >>
> >> I've backup my data - one file, which have 4060 MB. Unfortunetly I
> >> didn't
> >> point out that my destination file system is in old 3.5.x version. And
> >> of
> >> course I cannot read my data after 2GB (it says: Input/Output Error). I
> >> have converted my filesystem into 3.6.x, but still I'm not able to read
> >> this file. But if I create new file (for example: dd if=/dev/zero
> >> of=/mnt/hda3/some_file bs=1M count=3000), there is no problem to read
> >> it.
> >> Is it possible, to do something to restore my backup from this file? If
> >> yes, then how can I do it?
> >>
> >
> > Which kernel did you use?
> >
> 
> 2.6.14.7
> 
> 

Please try whether the attached patch helps.


diff -puN fs/reiserfs/inode.c~reiserfs-debug-read fs/reiserfs/inode.c



diff -puN fs/reiserfs/inode.c~reiserfs-read-4gb-files fs/reiserfs/inode.c
--- linux-2.6.14.7/fs/reiserfs/inode.c~reiserfs-read-4gb-files	2006-09-19 01:41:46.000000000 +0400
+++ linux-2.6.14.7-vs/fs/reiserfs/inode.c	2006-09-19 01:41:46.000000000 +0400
@@ -206,7 +206,7 @@ static inline void set_block_dev_mapped(
 static int file_capable(struct inode *inode, long block)
 {
 	if (get_inode_item_key_version(inode) != KEY_FORMAT_3_5 ||	// it is new file.
-	    block < (1 << (31 - inode->i_sb->s_blocksize_bits)))	// old file, but 'block' is inside of 2gb
+	    block < (1 << (32 - inode->i_sb->s_blocksize_bits)))	// old file, but 'block' is inside of 2gb
 		return 1;
 
 	return 0;

_