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qcow2: Allow lazy refcounts to be enabled on the command line

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qcow2 images now accept a boolean lazy_refcounts options. Use it like
this:

  -drive file=test.qcow2,lazy_refcounts=on

If the option is specified on the command line, it overrides the default
specified by the qcow2 header flags that were set when creating the
image.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2013-03-15 10:35:08 +01:00 • committed by Stefan Hajnoczi
parent 0006383e15
commit 74c4510a3c
3 changed files with 39 additions and 1 deletions
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1
block/qcow2.h
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@ -173,6 +173,7 @@ typedef struct BDRVQcowState {
int flags;
int qcow_version;
bool use_lazy_refcounts;
uint64_t incompatible_features;
uint64_t compatible_features;