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[Qemu-devel] [PATCH 01/15] block: Fail gracefully when using a format dr
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 01/15] block: Fail gracefully when using a format driver on protocol level |
Date: |
Fri, 12 Apr 2013 22:47:54 +0200 |
Specifying the wrong driver could fail an assertion:
$ qemu-system-x86_64 -drive file.driver=qcow2,file=x
qemu-system-x86_64: block.c:721: bdrv_open_common: Assertion `file !=
((void *)0)' failed.
Signed-off-by: Kevin Wolf <address@hidden>
---
block.c | 7 +++++++
tests/qemu-iotests/051 | 7 +++++++
tests/qemu-iotests/051.out | 10 ++++++++++
3 files changed, 24 insertions(+)
diff --git a/block.c b/block.c
index 602d8a4..f23bdcc 100644
--- a/block.c
+++ b/block.c
@@ -718,6 +718,13 @@ static int bdrv_open_common(BlockDriverState *bs,
BlockDriverState *file,
assert(drv->bdrv_parse_filename || filename != NULL);
ret = drv->bdrv_file_open(bs, filename, options, open_flags);
} else {
+ if (file == NULL) {
+ qerror_report(ERROR_CLASS_GENERIC_ERROR, "The '%s' block driver is
"
+ "not suitable for the bottom level",
+ drv->format_name);
+ ret = -EINVAL;
+ goto free_and_fail;
+ }
assert(file != NULL);
bs->file = file;
ret = drv->bdrv_open(bs, options, open_flags);
diff --git a/tests/qemu-iotests/051 b/tests/qemu-iotests/051
index 17a1d92..8f96ef4 100755
--- a/tests/qemu-iotests/051
+++ b/tests/qemu-iotests/051
@@ -142,6 +142,13 @@ run_qemu -drive media=cdrom,cache=writethrough
run_qemu -drive media=cdrom,cache=unsafe
run_qemu -drive media=cdrom,cache=invalid_value
+echo
+echo === Specifying the protocol layer ===
+echo
+
+run_qemu -drive file=$TEST_IMG,file.driver=file
+run_qemu -drive file=$TEST_IMG,file.driver=qcow2
+
# success, all done
echo "*** done"
rm -f $seq.full
diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
index da0d18b..194f2d2 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -159,4 +159,14 @@ q[K[Dqu[K[D[Dqui[K[D[D[Dquit[K
Testing: -drive media=cdrom,cache=invalid_value
qemu: -drive media=cdrom,cache=invalid_value: invalid cache option
+
+=== Specifying the protocol layer ===
+
+Testing: -drive file=TEST_DIR/t.qcow2,file.driver=file
+q[K[Dqu[K[D[Dqui[K[D[D[Dquit[K
+
+Testing: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2
+qemu: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2: The 'qcow2' block driver
is not suitable for the bottom level
+qemu: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2: could not open disk
image TEST_DIR/t.qcow2: Invalid argument
+
*** done
--
1.8.1.4
- [Qemu-devel] [PATCH 00/15] block: Overriding the backing file with -drive, Kevin Wolf, 2013/04/12
- [Qemu-devel] [PATCH 01/15] block: Fail gracefully when using a format driver on protocol level,
Kevin Wolf <=
- [Qemu-devel] [PATCH 02/15] block: Add driver-specific options for backing files, Kevin Wolf, 2013/04/12
- [Qemu-devel] [PATCH 03/15] block: Enable filename option, Kevin Wolf, 2013/04/12
- [Qemu-devel] [PATCH 04/15] raw-posix: Use bdrv_open options instead of filename, Kevin Wolf, 2013/04/12
- [Qemu-devel] [PATCH 05/15] raw-win32: Use bdrv_open options instead of filename, Kevin Wolf, 2013/04/12