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block/qapi: Introduce BlockGraphInfo

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Introduce a new QAPI type BlockGraphInfo and an associated
bdrv_query_block_graph_info() function that recursively gathers
BlockNodeInfo objects through a block graph.

A follow-up patch is going to make "qemu-img info" use this to print
information about all nodes that are (usually implicitly) opened for a
given image file.

Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220620162704.80987-8-hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Hanna Reitz 2022-06-20 18:26:59 +02:00 • committed by Kevin Wolf
parent 5d8813593f
commit 6cab33997b
3 changed files with 86 additions and 0 deletions
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3
include/block/qapi.h
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@ -43,6 +43,9 @@ void bdrv_query_image_info(BlockDriverState *bs,
bool flat,
bool skip_implicit_filters,
Error **errp);
void bdrv_query_block_graph_info(BlockDriverState *bs,
BlockGraphInfo **p_info,
Error **errp);
void bdrv_snapshot_dump(QEMUSnapshotInfo *sn);
void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec,