From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Jackson <Ian.Jackson@eu.citrix.com>
Subject: Re: [PATCH v2 for-4.6 3/3] tools/libxl: Only continue
 stream operations if the stream is still in progress
Date: Tue, 28 Jul 2015 16:12:13 +0100
Message-ID: <21943.39885.704950.477219@mariner.uk.xensource.com>
References: <1438015647-25377-1-git-send-email-andrew.cooper3@citrix.com>
	<1438015647-25377-4-git-send-email-andrew.cooper3@citrix.com>
	<21943.34423.586101.713988@mariner.uk.xensource.com>
	<55B78A21.3070402@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <55B78A21.3070402@citrix.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>, Ian Campbell <Ian.Campbell@citrix.com>, Xen-devel <xen-devel@lists.xen.org>
List-Id: xen-devel@lists.xenproject.org

Andrew Cooper writes ("Re: [PATCH v2 for-4.6 3/3] tools/libxl: Only continue stream operations if the stream is still in progress"):
> Imagine a scenario whereby some error has occured and
> check_all_finished() has _abort()'ed the tasks, but the save helper was
> already on the way out, signalling success.
...
> It is only save to stream_continue() if the stream is currently in use,
> which is not a guaranteed situation in this function even if rc is 0.

Hrm.  Yes.

What do you think about putting the inuse check in stream_continue ?

Ian.