blktap2: only open driver stack once

Currently blktap2 opens a driver stack, closes it, and re-opens
it. This causes problems with our remus driver: the primary may
connect to the backup in between the first and second open.

This is a temporary fix.

Signed-off-by: Ryan O'Connor <rjo@cs.ubc.ca>

diff --git a/tools/blktap2/drivers/tapdisk-vbd.c b/tools/blktap2/drivers/tapdisk-vbd.c
index 6aabfc22e4e4c8898253dbdb7253f44125847746..e53cede879f29954ebba7b3c9d0f970ffafda447 100644 (file)
--- a/tools/blktap2/drivers/tapdisk-vbd.c
+++ b/tools/blktap2/drivers/tapdisk-vbd.c
@@ -1560,9 +1560,11 @@ tapdisk_vbd_issue_request(td_vbd_t *vbd, td_vbd_request_t *vreq)
        gettimeofday(&vreq->last_try, NULL);
        tapdisk_vbd_move_request(vreq, &vbd->pending_requests);
 
+#if 0
        err = tapdisk_vbd_check_queue(vbd);
        if (err)
                goto fail;
+#endif
 
        err = tapdisk_image_check_ring_request(image, req);
        if (err)