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| author | Kevin Wolf <kwolf@redhat.com> | 2016-06-23 14:20:24 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-09-05 19:06:47 +0200 |
| commit | 7b5dca3f0215ec6484473631928a36c3eb8da0ef (patch) | |
| tree | 8e0e307a4e3c5abc2c9cdd85837994ae9553c47c | |
| parent | 75dfd402a734e8080fa77a1bcf60ecc46e0e6158 (diff) | |
| download | qemu-7b5dca3f0215ec6484473631928a36c3eb8da0ef.zip qemu-7b5dca3f0215ec6484473631928a36c3eb8da0ef.tar.gz qemu-7b5dca3f0215ec6484473631928a36c3eb8da0ef.tar.bz2 | |
block: Accept node-name for change-backing-file
In order to remove the necessity to use BlockBackend names in the
external API, we want to allow node-names everywhere. This converts
change-backing-file 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 <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
| -rw-r--r-- | blockdev.c | 15 | ||||
| -rw-r--r-- | qapi/block-core.json | 3 | ||||
| -rw-r--r-- | qmp-commands.hx | 3 |
3 files changed, 7 insertions, 14 deletions
@@ -3755,7 +3755,6 @@ void qmp_change_backing_file(const char *device, const char *backing_file, Error **errp) { - BlockBackend *blk; BlockDriverState *bs = NULL; AioContext *aio_context; BlockDriverState *image_bs = NULL; @@ -3764,22 +3763,14 @@ void qmp_change_backing_file(const char *device, int open_flags; int ret; - 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; } - 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, "Device '%s' has no medium", device); - goto out; - } - bs = blk_bs(blk); - image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); if (local_err) { error_propagate(errp, local_err); diff --git a/qapi/block-core.json b/qapi/block-core.json index bcb37db..d25ba46 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -998,7 +998,8 @@ # @image-node-name: The name of the block driver state node of the # image to modify. # -# @device: The name of the device that owns image-node-name. +# @device: The device name or node-name of the root node that owns +# image-node-name. # # @backing-file: The string to write as the backing file. This # string is not validated, so care should be taken diff --git a/qmp-commands.hx b/qmp-commands.hx index eb27360..c4ca603 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -1806,7 +1806,8 @@ Arguments: "device". (json-string, optional) -- "device": The name of the device. +- "device": The device name or node-name of the root node that owns + image-node-name. (json-string) - "backing-file": The string to write as the backing file. This string is |