From 0524e93a3fd7bff5bb4a584c372f2632ab7c0e0f Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Thu, 23 Jun 2016 14:20:24 +0200 Subject: [PATCH] block: Accept node-name for drive-mirror In order to remove the necessity to use BlockBackend names in the external API, we want to allow node-names everywhere. This converts drive-mirror to accept a node-name without lifting the restriction that we're operating at a root node. In case of an invalid device name, the command returns the GenericError error class now instead of DeviceNotFound, because this is what qmp_get_root_bs() returns. Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake Reviewed-by: Max Reitz --- blockdev.c | 14 +++----------- qapi/block-core.json | 5 +++-- qmp-commands.hx | 3 ++- tests/qemu-iotests/041 | 8 +++----- 4 files changed, 11 insertions(+), 19 deletions(-) diff --git a/blockdev.c b/blockdev.c index 773336c1c3..a392e08ed2 100644 --- a/blockdev.c +++ b/blockdev.c @@ -3429,7 +3429,6 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs, void qmp_drive_mirror(DriveMirror *arg, Error **errp) { BlockDriverState *bs; - BlockBackend *blk; BlockDriverState *source, *target_bs; AioContext *aio_context; BlockMirrorBackingMode backing_mode; @@ -3439,21 +3438,14 @@ void qmp_drive_mirror(DriveMirror *arg, Error **errp) int64_t size; const char *format = arg->format; - blk = blk_by_name(arg->device); - if (!blk) { - error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, - "Device '%s' not found", arg->device); + bs = qmp_get_root_bs(arg->device, errp); + if (!bs) { return; } - aio_context = blk_get_aio_context(blk); + aio_context = bdrv_get_aio_context(bs); aio_context_acquire(aio_context); - if (!blk_is_available(blk)) { - error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, arg->device); - goto out; - } - bs = blk_bs(blk); if (!arg->has_mode) { arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; } diff --git a/qapi/block-core.json b/qapi/block-core.json index f081eb8c56..fba1718cef 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1128,7 +1128,7 @@ # See DriveMirror for parameter descriptions # # Returns: nothing on success -# If @device is not a valid block device, DeviceNotFound +# If @device is not a valid block device, GenericError # # Since 1.3 ## @@ -1143,7 +1143,8 @@ # @job-id: #optional identifier for the newly-created block job. If # omitted, the device name will be used. (Since 2.7) # -# @device: the name of the device whose writes should be mirrored. +# @device: the device name or node-name of a root node whose writes should be +# mirrored. # # @target: the target of the new image. If the file exists, or if it # is a device, the existing file/device will be used as the new diff --git a/qmp-commands.hx b/qmp-commands.hx index c5e6cd57aa..956f1b0f47 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -1689,7 +1689,8 @@ Arguments: - "job-id": Identifier for the newly-created block job. If omitted, the device name will be used. (json-string, optional) -- "device": device name to operate on (json-string) +- "device": the device name or node-name of a root node whose writes should be + mirrored. (json-string) - "target": name of new image file (json-string) - "format": format of new image (json-string, optional) - "node-name": the name of the new block driver state in the node graph diff --git a/tests/qemu-iotests/041 b/tests/qemu-iotests/041 index cbf5e0ba5c..80939c0d0d 100755 --- a/tests/qemu-iotests/041 +++ b/tests/qemu-iotests/041 @@ -38,7 +38,6 @@ class TestSingleDrive(iotests.QMPTestCase): image_len = 1 * 1024 * 1024 # MB qmp_cmd = 'drive-mirror' qmp_target = target_img - not_found_error = 'DeviceNotFound' def setUp(self): iotests.create_image(backing_img, self.image_len) @@ -176,7 +175,7 @@ class TestSingleDrive(iotests.QMPTestCase): result = self.vm.qmp(self.qmp_cmd, device='ide1-cd0', sync='full', target=self.qmp_target) - self.assert_qmp(result, 'error/class', self.not_found_error) + self.assert_qmp(result, 'error/class', 'GenericError') def test_image_not_found(self): result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full', @@ -186,12 +185,11 @@ class TestSingleDrive(iotests.QMPTestCase): def test_device_not_found(self): result = self.vm.qmp(self.qmp_cmd, device='nonexistent', sync='full', target=self.qmp_target) - self.assert_qmp(result, 'error/class', self.not_found_error) + self.assert_qmp(result, 'error/class', 'GenericError') class TestSingleBlockdev(TestSingleDrive): qmp_cmd = 'blockdev-mirror' qmp_target = 'node1' - not_found_error = 'GenericError' def setUp(self): TestSingleDrive.setUp(self) @@ -922,7 +920,7 @@ class TestRepairQuorum(iotests.QMPTestCase): node_name='repair0', replaces='img1', target=quorum_repair_img, format=iotests.imgfmt) - self.assert_qmp(result, 'error/class', 'DeviceNotFound') + self.assert_qmp(result, 'error/class', 'GenericError') def test_wrong_sync_mode(self): if not self.has_quorum(): -- 2.11.4.GIT