Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
In-Reply-To: <CAOQ4uxhFzFFpF+ghACKTzzU_UrrJ3_+U6LwCOVXhgUyGe6=fVQ@mail.gmail.com>
References: <20180507083807.28792-1-mszeredi@redhat.com> <20180507083807.28792-16-mszeredi@redhat.com>
 <CAOQ4uxhFzFFpF+ghACKTzzU_UrrJ3_+U6LwCOVXhgUyGe6=fVQ@mail.gmail.com>
From:   Miklos Szeredi <miklos@szeredi.hu>
Date:   Tue, 8 May 2018 16:57:04 +0200
Message-ID: <CAJfpegvV8r8Bp6c2gZYhX1pOqDGHPDmURB6+x=09uR1diERUSg@mail.gmail.com>
Subject: Re: [PATCH v2 15/35] ovl: add ovl_fsync()
To:     Amir Goldstein <amir73il@gmail.com>
Cc:     Miklos Szeredi <mszeredi@redhat.com>,
        overlayfs <linux-unionfs@vger.kernel.org>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Tue, May 8, 2018 at 7:14 AM, Amir Goldstein <amir73il@gmail.com> wrote:
> On Mon, May 7, 2018 at 11:37 AM, Miklos Szeredi <mszeredi@redhat.com> wrote:
>> Implement stacked fsync().
>>
>> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
>> ---
>>  fs/overlayfs/file.c | 20 ++++++++++++++++++++
>>  1 file changed, 20 insertions(+)
>>
>> diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
>> index a7af56861aa5..419aa3f9967b 100644
>> --- a/fs/overlayfs/file.c
>> +++ b/fs/overlayfs/file.c
>> @@ -233,10 +233,30 @@ static ssize_t ovl_write_iter(struct kiocb *iocb, struct iov_iter *iter)
>>         return ret;
>>  }
>>
>> +static int ovl_fsync(struct file *file, loff_t start, loff_t end, int datasync)
>> +{
>> +       struct fd real;
>> +       const struct cred *old_cred;
>> +       int ret;
>> +
>
> Don't sync non-upper. same as ovl_dir_fsync()

Ah, that was about EROFS returned by lower fsync, right?

Thanks,
Miklos