[linux-cifs-client] [PATCH] cifs: don't attempt busy-file rename unless it's in same-directory

[Jeff Layton]

On Thu, 20 May 2010 12:15:37 -0500
Steve French <smfrench at gmail.com> wrote:

> Are we certain of this for all server types (NetApp, EMC, Samba etc.)?
> 

This is definitely the case with windows. The open-file rename call
only accepts simple filenames (no paths).

> On Thu, May 20, 2010 at 12:05 PM, Jeff Layton <jlayton at redhat.com> wrote:
> > Busy-file renames don't actually work across directories, so we need
> > to limit this code to renames within the same dir.
> >
> > Signed-off-by: Jeff Layton <jlayton at redhat.com>
> > ---
> >  fs/cifs/inode.c |    4 ++++
> >  1 files changed, 4 insertions(+), 0 deletions(-)
> >
> > diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
> > index 62b324f..6f0683c 100644
> > --- a/fs/cifs/inode.c
> > +++ b/fs/cifs/inode.c
> > @@ -1401,6 +1401,10 @@ cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
> >        if (rc == 0 || rc != -ETXTBSY)
> >                return rc;
> >
> > +       /* open-file renames don't work across directories */
> > +       if (to_dentry->d_parent != from_dentry->d_parent)
> > +               return rc;
> > +
> >        /* open the file to be renamed -- we need DELETE perms */
> >        rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
> >                         CREATE_NOT_DIR, &srcfid, &oplock, NULL,
> > --
> > 1.6.6.1
> >
> >
> 
> 
> 
> -- 
> Thanks,
> 
> Steve


-- 
Jeff Layton <jlayton at redhat.com>