[3.11.y.z extended stable] Patch "rbd: complete notifies before cleaning up osd_client and rbd_dev" has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Thu Jan 9 12:05:09 UTC 2014
This is a note to let you know that I have just added a patch titled
rbd: complete notifies before cleaning up osd_client and rbd_dev
to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From 1ccfb86a93cd9efb334ded3c1377f4eb314a913f Mon Sep 17 00:00:00 2001
From: Josh Durgin <josh.durgin at inktank.com>
Date: Thu, 29 Aug 2013 17:31:03 -0700
Subject: rbd: complete notifies before cleaning up osd_client and rbd_dev
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 <josh.durgin at inktank.com>
Reviewed-by: Alex Elder <elder at linaro.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
drivers/block/rbd.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 853e622..16f6966 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -5163,6 +5163,13 @@ static ssize_t rbd_remove(struct bus_type *bus,
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);
--
1.8.3.2
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