Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Mirror block job fixes for 2.6.0-rc4

# gpg: Signature made Fri 22 Apr 2016 15:46:41 BST using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream:
  mirror: Workaround for unexpected iohandler events during completion
  aio-posix: Skip external nodes in aio_dispatch
  virtio: Mark host notifiers as external
  event-notifier: Add "is_external" parameter
  iohandler: Introduce iohandler_get_aio_context

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/block/mirror.c b/block/mirror.c
index d56e30e472..039f48125e 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -495,6 +495,9 @@ out:
     block_job_completed(&s->common, data->ret);
     g_free(data);
     bdrv_drained_end(src);
+    if (qemu_get_aio_context() == bdrv_get_aio_context(src)) {
+        aio_enable_external(iohandler_get_aio_context());
+    }
     bdrv_unref(src);
 }
 
@@ -716,6 +719,12 @@ immediate_exit:
     /* Before we switch to target in mirror_exit, make sure data doesn't
      * change. */
     bdrv_drained_begin(s->common.bs);
+    if (qemu_get_aio_context() == bdrv_get_aio_context(bs)) {
+        /* FIXME: virtio host notifiers run on iohandler_ctx, therefore the
+         * above bdrv_drained_end isn't enough to quiesce it. This is ugly, we
+         * need a block layer API change to achieve this. */
+        aio_disable_external(iohandler_get_aio_context());
+    }
     block_job_defer_to_main_loop(&s->common, mirror_exit, data);
 }