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qcow2: Save refcount order in BDRVQcowState

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Save the image refcount order in BDRVQcowState. This will be relevant
for future code supporting different refcount orders than four and also
for code that needs to verify a certain refcount order for an opened
image.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2013-09-03 10:09:53 +02:00 committed by Kevin Wolf
parent 32b6444d23
commit b6481f376b
2 changed files with 3 additions and 1 deletions
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3
block/qcow2.c
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@ -455,6 +455,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags)
ret = -ENOTSUP;
goto fail;
}
s->refcount_order = header.refcount_order;
if (header.cluster_bits < MIN_CLUSTER_BITS ||
header.cluster_bits > MAX_CLUSTER_BITS) {
@ -1143,7 +1144,7 @@ int qcow2_update_header(BlockDriverState *bs)
.incompatible_features = cpu_to_be64(s->incompatible_features),
.compatible_features = cpu_to_be64(s->compatible_features),
.autoclear_features = cpu_to_be64(s->autoclear_features),
.refcount_order = cpu_to_be32(3 + REFCOUNT_SHIFT),
.refcount_order = cpu_to_be32(s->refcount_order),
.header_length = cpu_to_be32(header_length),
};

1
block/qcow2.h
View File

@ -199,6 +199,7 @@ typedef struct BDRVQcowState {
int flags;
int qcow_version;
bool use_lazy_refcounts;
int refcount_order;
bool discard_passthrough[QCOW2_DISCARD_MAX];