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block: Fail if requested driver is not available

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If an explicit driver option is present, but doesn't specify a valid
driver, then bdrv_open() should fail instead of probing the format.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2013-08-08 17:44:52 +02:00
parent f05b328c9d
commit 06d22aa367
3 changed files with 21 additions and 0 deletions
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7
tests/qemu-iotests/051
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@ -77,6 +77,13 @@ run_qemu -drive file="$TEST_IMG",format=qcow2,unknown_opt=on
run_qemu -drive file="$TEST_IMG",format=qcow2,unknown_opt=1234
run_qemu -drive file="$TEST_IMG",format=qcow2,unknown_opt=foo
echo
echo === Invalid format ===
echo
run_qemu -drive file="$TEST_IMG",format=foo
run_qemu -drive file="$TEST_IMG",driver=foo
echo
echo === Overriding backing file ===
echo