From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f68.google.com ([74.125.82.68]:38188 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935738AbeE2OoM (ORCPT ); Tue, 29 May 2018 10:44:12 -0400 Received: by mail-wm0-f68.google.com with SMTP id m129-v6so41262183wmb.3 for ; Tue, 29 May 2018 07:44:11 -0700 (PDT) From: Miklos Szeredi To: linux-unionfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 25/39] vfs: don't open real Date: Tue, 29 May 2018 16:43:25 +0200 Message-Id: <20180529144339.16538-26-mszeredi@redhat.com> In-Reply-To: <20180529144339.16538-1-mszeredi@redhat.com> References: <20180529144339.16538-1-mszeredi@redhat.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Let overlayfs do its thing when opening a file. This enables stacking and fixes the corner case when a file is opened for read, modified through a writable open, and data is read from the read-only file. After this patch the read-only open will not return stale data even in this case. Signed-off-by: Miklos Szeredi --- fs/open.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/fs/open.c b/fs/open.c index 6e52fd6fea7c..244cd2ecfefd 100644 --- a/fs/open.c +++ b/fs/open.c @@ -897,13 +897,8 @@ EXPORT_SYMBOL(file_path); int vfs_open(const struct path *path, struct file *file, const struct cred *cred) { - struct dentry *dentry = d_real(path->dentry, NULL, file->f_flags, 0); - - if (IS_ERR(dentry)) - return PTR_ERR(dentry); - file->f_path = *path; - return do_dentry_open(file, d_backing_inode(dentry), NULL, cred); + return do_dentry_open(file, d_backing_inode(path->dentry), NULL, cred); } /** -- 2.14.3