From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Josh Durgin , Alex Elder Subject: [PATCH 3.10 114/129] rbd: complete notifies before cleaning up osd_client and rbd_dev Date: Mon, 6 Jan 2014 14:39:03 -0800 Message-Id: <20140106223902.854306282@linuxfoundation.org> In-Reply-To: <20140106223859.589799655@linuxfoundation.org> References: <20140106223859.589799655@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Josh Durgin commit 9abc59908e0c5f983aaa91150da32d5b62cf60b7 upstream. To ensure rbd_dev is not used after it's released, flush all pending notify callbacks before calling rbd_dev_image_release(). No new notifies can be added to the queue at this point because the watch has already be unregistered with the osd_client. Signed-off-by: Josh Durgin Reviewed-by: Alex Elder Signed-off-by: Greg Kroah-Hartman --- drivers/block/rbd.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -5150,6 +5150,13 @@ static ssize_t rbd_remove(struct bus_typ ret = rbd_dev_header_watch_sync(rbd_dev, false); if (ret) rbd_warn(rbd_dev, "failed to cancel watch event (%d)\n", ret); + + /* + * flush remaining watch callbacks - these must be complete + * before the osd_client is shutdown + */ + dout("%s: flushing notifies", __func__); + ceph_osdc_flush_notifies(&rbd_dev->rbd_client->client->osdc); rbd_dev_image_release(rbd_dev); module_put(THIS_MODULE); ret = count;