On Wed, Nov 20, 2024 at 18:48:41 +0300, Nikolai Barybin via Devel wrote:
> In qcow2 header data file is represented by incompitible feature bit
> and its path is saved to header extension table.
> Thus, we implement here the logic similar to backing file probing.
>
> Signed-off-by: Nikolai Barybin <nikolai.barybin@xxxxxxxxxxxxx>
> ---
> src/storage_file/storage_file_probe.c | 46 ++++++++++++++++++++++++---
> 1 file changed, 42 insertions(+), 4 deletions(-)
[...]
> +static int
> +qcow2GetDataFile(char **res,
> + virBitmap *features,
> + char *buf,
> + size_t buf_size)
> +{
> + *res = NULL;
> +
> + if (buf_size < QCOW2v3_HDR_FEATURES_INCOMPATIBLE + 8)
> + return 0;
> +
> + if (features && virBitmapIsBitSet(features, VIR_STORAGE_FILE_FEATURE_DATA_FILE)) {
> + if (qcow2GetExtensions(buf, buf_size, NULL, res) < 0)
> + return 0;
This should be 'return -1'
> + }
> +
> + return 0;
> +}
> +
> +
> static int
> vmdk4GetBackingStore(char **res,
> int *format,
Reviewed-by: Peter Krempa <pkrempa@xxxxxxxxxx>
