Re: [libvirt] [PATCH v5 3/5] storage: add support for creating qcow2 images with extensions

Add -o compat= and -o lazy_refcounts options for qemu-img. --- src/storage/storage_backend.c | 62 ++++++++++++++++++++++--- tests/storagevolxml2argvdata/qcow2-1.1.argv | 1 + tests/storagevolxml2argvdata/qcow2-lazy.argv | 1 + tests/storagevolxml2argvdata/vol-qcow2-1.1.xml | 32 +++++++++++++ tests/storagevolxml2argvdata/vol-qcow2-lazy.xml | 35 ++++++++++++++ tests/storagevolxml2argvtest.c | 2 + 6 files changed, 126 insertions(+), 7 deletions(-) create mode 100644 tests/storagevolxml2argvdata/qcow2-1.1.argv create mode 100644 tests/storagevolxml2argvdata/qcow2-lazy.argv create mode 100644 tests/storagevolxml2argvdata/vol-qcow2-1.1.xml create mode 100644 tests/storagevolxml2argvdata/vol-qcow2-lazy.xml diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c index deea850..b2c9608 100644 --- a/src/storage/storage_backend.c +++ b/src/storage/storage_backend.c @@ -633,9 +633,15 @@ static int virStorageBackendCreateQemuImgOpts(char **opts, const char *backingType, bool encryption, - bool preallocate) + bool preallocate, + int format, + const char *compat, + virBitmapPtr features) { virBuffer buf = VIR_BUFFER_INITIALIZER; + bool b; + int i; + if (backingType) virBufferAsprintf(&buf, "backing_fmt=%s,", backingType); if (encryption) @@ -643,16 +649,45 @@ virStorageBackendCreateQemuImgOpts(char **opts, if (preallocate) virBufferAddLit(&buf, "preallocation=metadata,"); + if (compat) + virBufferAsprintf(&buf, "compat=%s,", compat); + if (features && format == VIR_STORAGE_FILE_QCOW2) { + for (i = 0; i < VIR_STORAGE_FILE_FEATURE_LAST; i++) { + ignore_value(virBitmapGetBit(features, i, &b)); + if (b) { + switch (i) { + case VIR_STORAGE_FILE_FEATURE_LAZY_REFCOUNTS: + if (STREQ(compat, "0.10")) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Feature %s not supported with compat" + " level %s"), + virStorageFileFeatureTypeToString(i), + compat); + goto error; + } + break;

+ case VIR_STORAGE_FILE_FEATURE_LAST: + ; + } + virBufferAsprintf(&buf, "%s,", + virStorageFileFeatureTypeToString(i)); + } + } + } + virBufferTrim(&buf, ",", -1);