Re: [PATCH v11 1/7] net/vmnet: add vmnet dependency and customizable option

[Roman Bolshakov <roman@roolebo.dev>]

On Wed, Jan 12, 2022 at 03:21:44PM +0300, Vladislav Yaroshchuk wrote:
> vmnet.framework dependency is added with 'vmnet' option
> to enable or disable it. Default value is 'auto'.
> 
> vmnet features to be used are available since macOS 11.0,
> corresponding probe is created into meson.build.
> 
> Signed-off-by: Vladislav Yaroshchuk <yaroshchuk2000@gmail.com>
> ---
>  meson.build                   | 23 ++++++++++++++++++++++-
>  meson_options.txt             |  2 ++
>  scripts/meson-buildoptions.sh |  3 +++
>  3 files changed, 27 insertions(+), 1 deletion(-)
> 
> diff --git a/meson.build b/meson.build
> index c1b1db1e28..b912c9cb91 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -496,6 +496,24 @@ if cocoa.found() and get_option('gtk').enabled()
>    error('Cocoa and GTK+ cannot be enabled at the same time')
>  endif
>  
> +vmnet = dependency('appleframeworks', modules: 'vmnet', required: get_option('vmnet'))
> +vmnet_11_0_api = false
> +if vmnet.found() and not cc.has_header_symbol('vmnet/vmnet.h',
> +                                              'VMNET_BRIDGED_MODE',
> +                                              dependencies: vmnet)
> +  vmnet = not_found
> +  if get_option('vmnet').enabled()
> +    error('vmnet.framework API is outdated')
> +  else
> +    warning('vmnet.framework API is outdated, disabling')
> +  endif
> +endif
> +if vmnet.found() and cc.has_header_symbol('vmnet/vmnet.h',
> +                                          'VMNET_SHARING_SERVICE_BUSY',
> +                                          dependencies: vmnet)
> +  vmnet_11_0_api = true
> +endif
> +
>  seccomp = not_found
>  if not get_option('seccomp').auto() or have_system or have_tools
>    seccomp = dependency('libseccomp', version: '>=2.3.0',
> @@ -1492,6 +1510,8 @@ config_host_data.set('CONFIG_SECCOMP', seccomp.found())
>  config_host_data.set('CONFIG_SNAPPY', snappy.found())
>  config_host_data.set('CONFIG_USB_LIBUSB', libusb.found())
>  config_host_data.set('CONFIG_VDE', vde.found())
> +config_host_data.set('CONFIG_VMNET', vmnet.found())
> +config_host_data.set('CONFIG_VMNET_11_0_API', vmnet_11_0_api)

Hi Vladislav,

There might be more functionality coming in the next macOS versions but
we likely don't want to add them as extra CONFIG defines. Instead we
wrap new symbols/functions/code that are avaialble above Big Sur in the
code as:

#if defined(MAC_OS_VERSION_11_0) && \
    MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0

    xpc_dictionary_set_bool(
        if_desc,
        vmnet_enable_isolation_key,
        options->isolated
    );

#endif

Please see similar thread here:
https://lists.gnu.org/archive/html/qemu-devel/2022-01/msg01915.html

Thanks,
Roman

>  config_host_data.set('CONFIG_VHOST_USER_BLK_SERVER', have_vhost_user_blk_server)
>  config_host_data.set('CONFIG_VNC', vnc.found())
>  config_host_data.set('CONFIG_VNC_JPEG', jpeg.found())
> @@ -3406,7 +3426,8 @@ summary(summary_info, bool_yn: true, section: 'Crypto')
>  # Libraries
>  summary_info = {}
>  if targetos == 'darwin'
> -  summary_info += {'Cocoa support':   cocoa}
> +  summary_info += {'Cocoa support':           cocoa}
> +  summary_info += {'vmnet.framework support': vmnet}
>  endif
>  summary_info += {'SDL support':       sdl}
>  summary_info += {'SDL image support': sdl_image}
> diff --git a/meson_options.txt b/meson_options.txt
> index 921967eddb..701e1381f9 100644
> --- a/meson_options.txt
> +++ b/meson_options.txt
> @@ -151,6 +151,8 @@ option('netmap', type : 'feature', value : 'auto',
>         description: 'netmap network backend support')
>  option('vde', type : 'feature', value : 'auto',
>         description: 'vde network backend support')
> +option('vmnet', type : 'feature', value : 'auto',
> +       description: 'vmnet.framework network backend support')
>  option('virglrenderer', type : 'feature', value : 'auto',
>         description: 'virgl rendering support')
>  option('vnc', type : 'feature', value : 'auto',
> diff --git a/scripts/meson-buildoptions.sh b/scripts/meson-buildoptions.sh
> index 50bd7bed4d..cdcece4b05 100644
> --- a/scripts/meson-buildoptions.sh
> +++ b/scripts/meson-buildoptions.sh
> @@ -84,6 +84,7 @@ meson_options_help() {
>    printf "%s\n" '  u2f             U2F emulation support'
>    printf "%s\n" '  usb-redir       libusbredir support'
>    printf "%s\n" '  vde             vde network backend support'
> +  printf "%s\n" '  vmnet           vmnet.framework network backend support'
>    printf "%s\n" '  vhost-user-blk-server'
>    printf "%s\n" '                  build vhost-user-blk server'
>    printf "%s\n" '  virglrenderer   virgl rendering support'
> @@ -248,6 +249,8 @@ _meson_option_parse() {
>      --disable-usb-redir) printf "%s" -Dusb_redir=disabled ;;
>      --enable-vde) printf "%s" -Dvde=enabled ;;
>      --disable-vde) printf "%s" -Dvde=disabled ;;
> +    --enable-vmnet) printf "%s" -Dvmnet=enabled ;;
> +    --disable-vmnet) printf "%s" -Dvmnet=disabled ;;
>      --enable-vhost-user-blk-server) printf "%s" -Dvhost_user_blk_server=enabled ;;
>      --disable-vhost-user-blk-server) printf "%s" -Dvhost_user_blk_server=disabled ;;
>      --enable-virglrenderer) printf "%s" -Dvirglrenderer=enabled ;;
> -- 
> 2.23.0
> 
>