The NBD server uses an AioContext notifier, so it can tolerate that its
BlockBackend is switched to a different AioContext. Before we start
actually calling bdrv_try_set_aio_context(), which checks for
consistency, outside of test cases, we need to make sure that the NBD
server actually allows this.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
nbd/server.c | 1 +
tests/qemu-iotests/240 | 21 +++++++++++++++++++++
tests/qemu-iotests/240.out | 13 +++++++++++++
3 files changed, 35 insertions(+)
diff --git a/nbd/server.c b/nbd/server.c
index e21bd501dc..d1375350bc 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1491,6 +1491,7 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset,
goto fail;
}
blk_set_enable_write_cache(blk, !writethrough);
+ blk_set_allow_aio_context_change(blk, true);
exp->refcount = 1;
QTAILQ_INIT(&exp->clients);
diff --git a/tests/qemu-iotests/240 b/tests/qemu-iotests/240
index b4cf95096d..5be6b9c0f7 100755
--- a/tests/qemu-iotests/240
+++ b/tests/qemu-iotests/240
@@ -27,6 +27,12 @@ echo "QA output created by $seq"
status=1 # failure is the default!
+_cleanup()
+{
+ rm -f "$TEST_DIR/nbd"
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
@@ -122,6 +128,21 @@ run_qemu <<EOF
{ "execute": "quit"}
EOF
+echo
+echo === Attach a SCSI disks using the same block device as a NBD server ===
+echo
+
+run_qemu <<EOF
+{ "execute": "qmp_capabilities" }
+{ "execute": "blockdev-add", "arguments": {"driver": "null-co", "node-name": "hd0", "read-only": true}}
+{ "execute": "nbd-server-start", "arguments": {"addr":{"type":"unix","data":{"path":"$TEST_DIR/nbd"}}}}
+{ "execute": "nbd-server-add", "arguments": {"device":"hd0"}}
+{ "execute": "object-add", "arguments": {"qom-type": "iothread", "id": "iothread0"}}
+{ "execute": "device_add", "arguments": {"id": "scsi0", "driver": "${virtio_scsi}", "iothread": "iothread0"}}
+{ "execute": "device_add", "arguments": {"id": "scsi-hd0", "driver": "scsi-hd", "drive": "hd0", "bus": "scsi0.0"}}
+{ "execute": "quit"}
+EOF
+
# success, all done
echo "*** done"
rm -f $seq.full
diff --git a/tests/qemu-iotests/240.out b/tests/qemu-iotests/240.out
index d76392966c..84e0a43ce5 100644
--- a/tests/qemu-iotests/240.out
+++ b/tests/qemu-iotests/240.out
@@ -51,4 +51,17 @@ QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
+
+=== Attach a SCSI disks using the same block device as a NBD server ===
+
+Testing:
+QMP_VERSION
+{"return": {}}
+{"return": {}}
+{"return": {}}
+{"return": {}}
+{"return": {}}
+{"return": {}}
+{"return": {}}
+{"return": {}}
*** done
--
2.20.1