[PATCH v2 3/3] virDomainRestoreFlags: Require VIR_DOMAIN_SAVE_PARAM_FILE for now

[Claudio Fontana]

On 5/13/22 9:54 AM, Michal Privoznik wrote:
> Calling virDomainRestoreFlags() with no typed params results in
> an error in open() because it tries to open a NULL path.
> Obviously, this is wrong and path to restore from must be
> provided, at least for now until other sources of restore are
> introduced. Then this limitation can be relaxed.
> 
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
>  src/libvirt-domain.c   | 4 +++-
>  src/qemu/qemu_driver.c | 6 ++++++
>  2 files changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
> index 208c2438fe..a32630a6e9 100644
> --- a/src/libvirt-domain.c
> +++ b/src/libvirt-domain.c
> @@ -1190,7 +1190,9 @@ virDomainRestoreFlags(virConnectPtr conn, const char *from, const char *dxml,
>   * @nparams: number of restore parameters
>   * @flags: bitwise-OR of virDomainSaveRestoreFlags
>   *
> - * This method extends virDomainRestoreFlags by adding parameters.
> + * This method extends virDomainRestoreFlags by adding parameters. For
> + * now, VIR_DOMAIN_SAVE_PARAM_FILE is required but this requirement may
> + * be lifted in the future.
>   *
>   * Returns 0 in case of success and -1 in case of failure.
>   *
> diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
> index 0b31c73bb9..702fd0239c 100644
> --- a/src/qemu/qemu_driver.c
> +++ b/src/qemu/qemu_driver.c
> @@ -5967,6 +5967,12 @@ qemuDomainRestoreParams(virConnectPtr conn,
>                                  VIR_DOMAIN_SAVE_PARAM_DXML, &dxml) < 0)
>          return -1;
>  
> +    if (!path) {

Similarly to before, should the check be (!path || !path[0]) ?

Thanks

C

> +        virReportError(VIR_ERR_INVALID_ARG, "%s",
> +                       _("missing path to restore from"));
> +        return -1;
> +    }
> +
>      ret = qemuDomainRestoreInternal(conn, path, dxml, flags,
>                                      virDomainRestoreParamsEnsureACL);
>      return ret;
>