From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Layton Subject: [PATCH v8 19/32] vfs: fix user_statfs to retry once on ESTALE errors Date: Sat, 27 Oct 2012 08:33:26 -0400 Message-ID: <1351341219-17837-20-git-send-email-jlayton@redhat.com> References: <1351341219-17837-1-git-send-email-jlayton@redhat.com> Cc: linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, michael.brantley@deshaw.com, hch@infradead.org, miklos@szeredi.hu, pstaubach@exagrid.com To: viro@zeniv.linux.org.uk Return-path: Received: from mail-ye0-f174.google.com ([209.85.213.174]:56913 "EHLO mail-ye0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756014Ab2J0MeZ (ORCPT ); Sat, 27 Oct 2012 08:34:25 -0400 Received: by mail-ye0-f174.google.com with SMTP id m12so638325yen.19 for ; Sat, 27 Oct 2012 05:34:24 -0700 (PDT) In-Reply-To: <1351341219-17837-1-git-send-email-jlayton@redhat.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Signed-off-by: Jeff Layton --- fs/statfs.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/fs/statfs.c b/fs/statfs.c index f8e832e..7b42ca3 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -77,11 +77,19 @@ EXPORT_SYMBOL(vfs_statfs); int user_statfs(const char __user *pathname, struct kstatfs *st) { struct path path; - int error = user_path_at(AT_FDCWD, pathname, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path); - if (!error) { + int error; + unsigned int try = 0; + unsigned int lookup_flags = LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT; + + do { + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); + if (error) + break; + error = vfs_statfs(&path, st); path_put(&path); - } + lookup_flags |= LOOKUP_REVAL; + } while (retry_estale(error, try++)); return error; } -- 1.7.11.7