The only user of rbd_obj_notify_ack() is rbd_watch_cb(). It used
asynchronously with no tracking of when the notify ack completes, so
it may still be in progress when the osd_client is shut down. This
results in a BUG() since the osd client assumes no requests are in
flight when it stops. Since all notifies are flushed before the
osd_client is stopped, waiting for the notify ack to complete before
returning from the watch callback ensures there are no notify acks in
flight during shutdown.
Rename rbd_obj_notify_ack() to rbd_obj_notify_ack_sync() to reflect
its new synchronous nature.
Signed-off-by: Josh Durgin <josh.durgin@xxxxxxxxxxx>
---
drivers/block/rbd.c | 11 ++++++-----
1 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index bf89e34..9e5f07f 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2808,7 +2808,7 @@ out_err:
obj_request_done_set(obj_request);
}
-static int rbd_obj_notify_ack(struct rbd_device *rbd_dev, u64 notify_id)
+static int rbd_obj_notify_ack_sync(struct rbd_device *rbd_dev, u64 notify_id)
{
struct rbd_obj_request *obj_request;
struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
@@ -2823,16 +2823,17 @@ static int rbd_obj_notify_ack(struct rbd_device *rbd_dev, u64 notify_id)
obj_request->osd_req = rbd_osd_req_create(rbd_dev, false, obj_request);
if (!obj_request->osd_req)
goto out;
- obj_request->callback = rbd_obj_request_put;
osd_req_op_watch_init(obj_request->osd_req, 0, CEPH_OSD_OP_NOTIFY_ACK,
notify_id, 0, 0);
rbd_osd_req_format_read(obj_request);
ret = rbd_obj_request_submit(osdc, obj_request);
-out:
if (ret)
- rbd_obj_request_put(obj_request);
+ goto out;
+ ret = rbd_obj_request_wait(obj_request);
+out:
+ rbd_obj_request_put(obj_request);
return ret;
}
@@ -2852,7 +2853,7 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data)
if (ret)
rbd_warn(rbd_dev, "header refresh error (%d)\n", ret);
- rbd_obj_notify_ack(rbd_dev, notify_id);
+ rbd_obj_notify_ack_sync(rbd_dev, notify_id);
}
/*
--
1.7.2.5
--
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