From 75dfd402a734e8080fa77a1bcf60ecc46e0e6158 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 blockdev-snapshot-internal-sync In order to remove the necessity to use BlockBackend names in the external API, we want to allow node-names everywhere. This converts blockdev-snapshot-internal-sync 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: Alberto Garcia Reviewed-by: Max Reitz --- blockdev.c | 15 +++------------ qapi/block.json | 5 +++-- qmp-commands.hx | 6 ++++-- tests/qemu-iotests/057 | 2 +- 4 files changed, 11 insertions(+), 17 deletions(-) diff --git a/blockdev.c b/blockdev.c index 9feffcd088..f775bbdf9d 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1511,7 +1511,6 @@ static void internal_snapshot_prepare(BlkActionState *common, Error *local_err = NULL; const char *device; const char *name; - BlockBackend *blk; BlockDriverState *bs; QEMUSnapshotInfo old_sn, *sn; bool ret; @@ -1534,23 +1533,15 @@ static void internal_snapshot_prepare(BlkActionState *common, return; } - blk = blk_by_name(device); - if (!blk) { - error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, - "Device '%s' not found", device); + bs = qmp_get_root_bs(device, errp); + if (!bs) { return; } /* AioContext is released in .clean() */ - state->aio_context = blk_get_aio_context(blk); + state->aio_context = bdrv_get_aio_context(bs); aio_context_acquire(state->aio_context); - if (!blk_is_available(blk)) { - error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); - return; - } - bs = blk_bs(blk); - state->bs = bs; bdrv_drained_begin(bs); diff --git a/qapi/block.json b/qapi/block.json index c0e831fd29..db05169187 100644 --- a/qapi/block.json +++ b/qapi/block.json @@ -58,7 +58,8 @@ ## # @BlockdevSnapshotInternal # -# @device: the name of the device to generate the snapshot from +# @device: the device name or node-name of a root node to generate the snapshot +# from # # @name: the name of the internal snapshot to be created # @@ -80,7 +81,7 @@ # For the arguments, see the documentation of BlockdevSnapshotInternal. # # Returns: nothing on success -# If @device is not a valid block device, DeviceNotFound +# If @device is not a valid block device, GenericError # If any snapshot matching @name exists, or @name is empty, # GenericError # If the format of the image used does not support it, diff --git a/qmp-commands.hx b/qmp-commands.hx index 6793c8d36b..eb2736009f 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -1407,7 +1407,8 @@ actions array: - "mode": whether and how QEMU should create the snapshot file (NewImageMode, optional, default "absolute-paths") When "type" is "blockdev-snapshot-internal-sync": - - "device": device name to snapshot (json-string) + - "device": the device name or node-name of a root node to snapshot + (json-string) - "name": name of the new snapshot (json-string) Example: @@ -1608,7 +1609,8 @@ name already exists, the operation will fail. Arguments: -- "device": device name to snapshot (json-string) +- "device": the device name or node-name of a root node to snapshot + (json-string) - "name": name of the new snapshot (json-string) Example: diff --git a/tests/qemu-iotests/057 b/tests/qemu-iotests/057 index bb6c06a6fd..9f0a5a3057 100755 --- a/tests/qemu-iotests/057 +++ b/tests/qemu-iotests/057 @@ -182,7 +182,7 @@ class TestSingleTransaction(ImageSnapshotTestCase): 'name': 'a' }, }] result = self.vm.qmp('transaction', actions = actions) - self.assert_qmp(result, 'error/class', 'DeviceNotFound') + self.assert_qmp(result, 'error/class', 'GenericError') def test_error_exist(self): self.createSnapshotInTransaction(1)