iotests/172: Cover -global floppy.drive=...
Use of -global to set a default backend for non-singleton devices is a
bad idea. But as long as we permit it, we better test it.
Test output demonstrates we screw up when -global floppy clashes with
-fda or with -device floppy: according to "info qtree", only the
latter backend is attached, but according to "info block", both are.
Here's the clash with -device:
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2.2 -global floppy.drive=none0 -device floppy,drive=none1,unit=0
dev: isa-fdc, id ""
[...]
driveA = ""
driveB = ""
[...]
bus: floppy-bus.0
type floppy-bus
dev: floppy, id ""
unit = 0 (0x0)
---> drive = "none1"
[...]
none0 (NODE_NAME): TEST_DIR/t.qcow2 (qcow2)
---> Attached to: /machine/peripheral-anon/device[0]
Cache mode: writeback
none1 (NODE_NAME): TEST_DIR/t.qcow2.2 (qcow2)
---> Attached to: /machine/peripheral-anon/device[0]
Removable device: not locked, tray closed
Cache mode: writeback
/machine/peripheral-anon/device[0] is the floppy created with -device.
Test output further demonstrates the "Drive 'FOO' is already in use
because it has been automatically connected to another device" error
message can be misleading. With '-fda "" -global
floppy.drive=floppy0', it's in use because -global reuses -fda's
backend. There is no other device involved.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200622094227.1271650-4-armbru@redhat.com>
diff --git a/tests/qemu-iotests/172 b/tests/qemu-iotests/172
index 714c752..18056bc 100755
--- a/tests/qemu-iotests/172
+++ b/tests/qemu-iotests/172
@@ -151,6 +151,7 @@
# Conflicting (-fdX wins)
check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveA=none0
check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveB=none0
+check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global floppy.drive=none0
echo
echo
@@ -192,12 +193,16 @@
-global isa-fdc.driveB=none0 -device floppy,drive=none1
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=0
+check_floppy_qtree -drive if=none,file="$TEST_IMG" \
+ -global floppy.drive=none0 -device floppy,unit=0
# Conflicting
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=0
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=1
+check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
+ -global floppy.drive=none0 -device floppy,drive=none1,unit=0
echo
echo
@@ -205,8 +210,10 @@
# if=none
check_floppy_qtree -drive if=none -device floppy,drive=none0 -device floppy -device floppy,drive=none0
+check_floppy_qtree -drive if=none -global floppy.drive=none0 -device floppy -device floppy
# if=floppy
check_floppy_qtree -fda "" -device floppy,drive=floppy0
+check_floppy_qtree -fda "" -global floppy.drive=floppy0
# default if=floppy (not found, because it's created later)
check_floppy_qtree -device floppy,drive=floppy0
