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Re: [PATCH v19 4/7] net/vmnet: implement host mode (vmnet-host)


From: Vladislav Yaroshchuk
Subject: Re: [PATCH v19 4/7] net/vmnet: implement host mode (vmnet-host)
Date: Wed, 16 Mar 2022 02:18:14 +0300



On Tue, Mar 15, 2022 at 11:37 PM Akihiko Odaki <akihiko.odaki@gmail.com> wrote:
On 2022/03/16 5:27, Vladislav Yaroshchuk wrote:
> Signed-off-by: Vladislav Yaroshchuk <Vladislav.Yaroshchuk@jetbrains.com>
> ---
>   net/vmnet-host.c | 110 ++++++++++++++++++++++++++++++++++++++++++++---
>   1 file changed, 104 insertions(+), 6 deletions(-)
>
> diff --git a/net/vmnet-host.c b/net/vmnet-host.c
> index a461d507c5..8f7a638967 100644
> --- a/net/vmnet-host.c
> +++ b/net/vmnet-host.c
> @@ -9,16 +9,114 @@
>    */
>   
>   #include "qemu/osdep.h"
> +#include "qemu/uuid.h"
>   #include "qapi/qapi-types-net.h"
> -#include "vmnet_int.h"
> -#include "clients.h"
> -#include "qemu/error-report.h"
>   #include "qapi/error.h"
> +#include "clients.h"
> +#include "vmnet_int.h"
>   
>   #include <vmnet/vmnet.h>
>   
> +
> +static bool validate_options(const Netdev *netdev, Error **errp)
> +{
> +    const NetdevVmnetHostOptions *options = &(netdev->u.vmnet_host);
> +    QemuUUID uuid;

The variable uuid is used only when defined(MAC_OS_VERSION_11_0) && \
MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_VERSION_11_0 and may result in a
compilation warning otherwise. It should be in the #if block as
network_uuid variable in build_if_desc is in the counterpart.

Also I suggest to unify the names of identifiers. There are
options->net_uuid, uuid, and network_uuid, but the differences tells
nothing.

This should be the last thing to be addressed (unless I missed something
again.) Thank you for persistence (It's v19!). I really appreciate your
contribution.


Thank you for your help and persistence in the review 
process :)

Fixed bad naming and moved 'QemuUUID net_uuid'
definition into #if block in validate_options in v20.

Best Regards,
Vladislav Yaroshchuk

Regards,
Akihiko Odaki

> +
> +#if defined(MAC_OS_VERSION_11_0) && \
> +    MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_VERSION_11_0
> +
> +    if (options->has_net_uuid &&
> +        qemu_uuid_parse(options->net_uuid, &uuid) < 0) {
> +        error_setg(errp, "Invalid UUID provided in 'net-uuid'");
> +        return false;
> +    }
> +#else
> +    if (options->has_isolated) {
> +        error_setg(errp,
> +                   "vmnet-host.isolated feature is "
> +                   "unavailable: outdated vmnet.framework API");
> +        return false;
> +    }
> +
> +    if (options->has_net_uuid) {
> +        error_setg(errp,
> +                   "vmnet-host.net-uuid feature is "
> +                   "unavailable: outdated vmnet.framework API");
> +        return false;
> +    }
> +#endif
> +
> +    if ((options->has_start_address ||
> +         options->has_end_address ||
> +         options->has_subnet_mask) &&
> +        !(options->has_start_address &&
> +          options->has_end_address &&
> +          options->has_subnet_mask)) {
> +        error_setg(errp,
> +                   "'start-address', 'end-address', 'subnet-mask' "
> +                   "should be provided together");
> +        return false;
> +    }
> +
> +    return true;
> +}
> +
> +static xpc_object_t build_if_desc(const Netdev *netdev,
> +                                  NetClientState *nc)
> +{
> +    const NetdevVmnetHostOptions *options = &(netdev->u.vmnet_host);
> +    xpc_object_t if_desc = xpc_dictionary_create(NULL, NULL, 0);
> +
> +    xpc_dictionary_set_uint64(if_desc,
> +                              vmnet_operation_mode_key,
> +                              VMNET_HOST_MODE);
> +
> +#if defined(MAC_OS_VERSION_11_0) && \
> +    MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_VERSION_11_0
> +
> +    xpc_dictionary_set_bool(if_desc,
> +                            vmnet_enable_isolation_key,
> +                            options->isolated);
> +
> +    QemuUUID network_uuid;
> +    if (options->has_net_uuid) {
> +        qemu_uuid_parse(options->net_uuid, &network_uuid);
> +        xpc_dictionary_set_uuid(if_desc,
> +                                vmnet_network_identifier_key,
> +                                network_uuid.data);
> +    }
> +#endif
> +
> +    if (options->has_start_address) {
> +        xpc_dictionary_set_string(if_desc,
> +                                  vmnet_start_address_key,
> +                                  options->start_address);
> +        xpc_dictionary_set_string(if_desc,
> +                                  vmnet_end_address_key,
> +                                  options->end_address);
> +        xpc_dictionary_set_string(if_desc,
> +                                  vmnet_subnet_mask_key,
> +                                  options->subnet_mask);
> +    }
> +
> +    return if_desc;
> +}
> +
> +static NetClientInfo net_vmnet_host_info = {
> +    .type = NET_CLIENT_DRIVER_VMNET_HOST,
> +    .size = sizeof(VmnetState),
> +    .receive = vmnet_receive_common,
> +    .cleanup = vmnet_cleanup_common,
> +};
> +
>   int net_init_vmnet_host(const Netdev *netdev, const char *name,
> -                        NetClientState *peer, Error **errp) {
> -  error_setg(errp, "vmnet-host is not implemented yet");
> -  return -1;
> +                        NetClientState *peer, Error **errp)
> +{
> +    NetClientState *nc = qemu_new_net_client(&net_vmnet_host_info,
> +                                             peer, "vmnet-host", name);
> +    if (!validate_options(netdev, errp)) {
> +        return -1;
> +    }
> +    return vmnet_if_create(nc, build_if_desc(netdev, nc), errp);
>   }


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