[Ocfs2-devel] ocfs2: question about dlmfs_file_read()

[Joel Becker]

On Sun, Apr 18, 2010 at 10:32:01PM +0300, Dan Carpenter wrote:
> Hello list,
> 
> I was looking through the code for something unrelated and I got
> confused by this.
> 
> fs/ocfs2/dlmfs/dlmfs.c dlmfs_file_read()
>    261          /* don't read past the lvb */
>    262          if ((count + *ppos) > i_size_read(inode))
>    263                  readlen = i_size_read(inode) - *ppos;
>    264          else
>    265                  readlen = count - *ppos;
> 
> 	Shouldn't "readlen" just be "count" here?  What prevents it from 
> 	being a negative number?
> 
>    266
>    267          lvb_buf = kmalloc(readlen, GFP_NOFS);
> 
> Anyway, this code has been around for a long time so I'm probably
> missing something.  I was just curious.

	No, I think you're right.  Mark, Sunil, anyone?

Joel

-- 

Life's Little Instruction Book #510

	"Count your blessings."

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127