On Mon, Sep 17, 2012 at 04:05:10PM +0000, Myklebust, Trond wrote: > > -----Original Message----- > > From: linux-nfs-owner@xxxxxxxxxxxxxxx [mailto:linux-nfs- > > owner@xxxxxxxxxxxxxxx] On Behalf Of J. Bruce Fields > > Sent: Monday, September 17, 2012 11:54 AM > > To: Myklebust, Trond; Schumaker, Bryan > > Cc: linux-nfs@xxxxxxxxxxxxxxx > > Subject: readdir cookies > > > > How does the nfs client decide what directory cookies to return? (As the > > d_off field to readdir, for example). > > > > I'd assumed it would return the server's cookie, but testing shows it returns a > > simple integer sequence. > > We cache the cookies and use them to figure out where the readdir cursor is after a directory update, but we use positive integers for telldir()/seekdir(). The reason is that too many servers return cookies that use > 32 bits (NFSv2-incompatible) or are unsigned. Ok--so the tradeoff is that telldir/seekdir cookies may not be good indefinitely? --b. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
