Return-Path: linux-nfs-owner@vger.kernel.org Received: from fieldses.org ([174.143.236.118]:32805 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933270AbaGWUsc (ORCPT ); Wed, 23 Jul 2014 16:48:32 -0400 Date: Wed, 23 Jul 2014 16:48:24 -0400 From: "J. Bruce Fields" To: Jeff Layton Cc: linux-nfs@vger.kernel.org, hch@infradead.org Subject: Re: [PATCH] nfsd: ensure that st_access_bmap and st_deny_bmap are initialized to 0 Message-ID: <20140723204824.GJ9118@fieldses.org> References: <1406137609-24466-1-git-send-email-jlayton@primarydata.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1406137609-24466-1-git-send-email-jlayton@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Wed, Jul 23, 2014 at 01:46:49PM -0400, Jeff Layton wrote: > Open stateids must be initialized with the st_access_bmap and > st_deny_bmap set to 0, so that nfs4_get_vfs_file can properly record > their state in old_access_bmap and old_deny_bmap. > > This bug was introduced in commit baeb4ff0e502 (nfsd: make deny mode > enforcement more efficient and close races in it) and was causing the > refcounts to end up incorrect when nfs4_get_vfs_file returned an error > after bumping the refcounts. This made it impossible to unmount the > underlying filesystem after running pynfs tests that involve deny modes. Thanks, applied.--b. > > Signed-off-by: Jeff Layton > --- > fs/nfsd/nfs4state.c | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c > index 72da0d44e66b..ce07e9517a80 100644 > --- a/fs/nfsd/nfs4state.c > +++ b/fs/nfsd/nfs4state.c > @@ -2968,8 +2968,6 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, > stp->st_file = fp; > stp->st_access_bmap = 0; > stp->st_deny_bmap = 0; > - set_access(open->op_share_access, stp); > - set_deny(open->op_share_deny, stp); > stp->st_openstp = NULL; > spin_lock(&fp->fi_lock); > list_add(&stp->st_perfile, &fp->fi_stateids); > -- > 1.9.3 >