[libvirt] [PATCH] remote: set VIR_TYPED_PARAM_STRING_OKAY on migration

[Erik Skultety]

On 05/02/16 20:24, Joao Martins wrote:
> Commit 8cd1d54 ("util: Export remoteSerializeTypedParameters
> internally via util") consolidates both daemon and remote
> driver typed param serialization functions. Though as is
> no flags are passed which lets virTypedParamsSerialize to
> ignore all strings (to be sent), thus leading to fail
> migration on drivers on Prepare phase, as already reported
> by the Xen test CI[0] with:
> 
> error: internal error: no domain XML passed
> 

Sigh, I wish the reality was "easy to refactor, hard to break" rather
than vice versa... :(

> This patch proposes setting VIR_TYPED_PARAM_STRING_OKAY
> to avoid leading such failures.
> 
> [0]
> http://lists.xenproject.org/archives/html/xen-devel/2016-02/msg01012.html
> 
> Signed-off-by: Joao Martins <joao.m.martins at oracle.com>
> ---
>  src/remote/remote_driver.c | 18 ++++++++++++------
>  1 file changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
> index 58787cd..7cf61cf 100644
> --- a/src/remote/remote_driver.c
> +++ b/src/remote/remote_driver.c
> @@ -6886,7 +6886,8 @@ remoteDomainMigrateBegin3Params(virDomainPtr domain,
>  
>      if (virTypedParamsSerialize(params, nparams,
>                                  (virTypedParameterRemotePtr *) &args.params.params_val,
> -                                &args.params.params_len, 0) < 0) {
> +                                &args.params.params_len,
> +                                VIR_TYPED_PARAM_STRING_OKAY) < 0) {
>          xdr_free((xdrproc_t) xdr_remote_domain_migrate_begin3_params_args,
>                   (char *) &args);
>          goto cleanup;
> @@ -6953,7 +6954,8 @@ remoteDomainMigratePrepare3Params(virConnectPtr dconn,
>  
>      if (virTypedParamsSerialize(params, nparams,
>                                  (virTypedParameterRemotePtr *) &args.params.params_val,
> -                                &args.params.params_len, 0) < 0) {
> +                                &args.params.params_len,
> +                                VIR_TYPED_PARAM_STRING_OKAY) < 0) {
>          xdr_free((xdrproc_t) xdr_remote_domain_migrate_prepare3_params_args,
>                   (char *) &args);
>          goto cleanup;
> @@ -7040,7 +7042,8 @@ remoteDomainMigratePrepareTunnel3Params(virConnectPtr dconn,
>  
>      if (virTypedParamsSerialize(params, nparams,
>                                  (virTypedParameterRemotePtr *) &args.params.params_val,
> -                                &args.params.params_len, 0) < 0) {
> +                                &args.params.params_len,
> +                                VIR_TYPED_PARAM_STRING_OKAY) < 0) {
>          xdr_free((xdrproc_t) xdr_remote_domain_migrate_prepare_tunnel3_params_args,
>                   (char *) &args);
>          goto cleanup;
> @@ -7129,7 +7132,8 @@ remoteDomainMigratePerform3Params(virDomainPtr dom,
>  
>      if (virTypedParamsSerialize(params, nparams,
>                                  (virTypedParameterRemotePtr *) &args.params.params_val,
> -                                &args.params.params_len, 0) < 0) {
> +                                &args.params.params_len,
> +                                VIR_TYPED_PARAM_STRING_OKAY) < 0) {
>          xdr_free((xdrproc_t) xdr_remote_domain_migrate_perform3_params_args,
>                   (char *) &args);
>          goto cleanup;
> @@ -7201,7 +7205,8 @@ remoteDomainMigrateFinish3Params(virConnectPtr dconn,
>  
>      if (virTypedParamsSerialize(params, nparams,
>                                  (virTypedParameterRemotePtr *) &args.params.params_val,
> -                                &args.params.params_len, 0) < 0) {
> +                                &args.params.params_len,
> +                                VIR_TYPED_PARAM_STRING_OKAY) < 0) {
>          xdr_free((xdrproc_t) xdr_remote_domain_migrate_finish3_params_args,
>                   (char *) &args);
>          goto cleanup;
> @@ -7275,7 +7280,8 @@ remoteDomainMigrateConfirm3Params(virDomainPtr domain,
>  
>      if (virTypedParamsSerialize(params, nparams,
>                                  (virTypedParameterRemotePtr *) &args.params.params_val,
> -                                &args.params.params_len, 0) < 0) {
> +                                &args.params.params_len,
> +                                VIR_TYPED_PARAM_STRING_OKAY) < 0) {
>          xdr_free((xdrproc_t) xdr_remote_domain_migrate_confirm3_params_args,
>                   (char *) &args);
>          goto cleanup;
> 
The patch itself is fine, but it only covers migration. The commit you
mentioned in the commit message also broke blkiotune and numatune APIs
which have their client bodies generated by gendispatch.pl. So I
adjusted the gendispatch accordingly, squashed into your patch and
pushed. Hopefully, there won't be any other use cases I missed.

Erik