Re: [Qemu-devel] [PATCH] qga-win: Adding support for Windows Server 2019 get-osinfo command

["Tomáš Golembiovský" <tgolembi@redhat.com>]

On Wed, 19 Dec 2018 10:40:51 +0200
Bishara AbuHattoum <bishara@daynix.com> wrote:

> Since Windows Server 2016, Microsoft stopped upgrading the major and minor
> versions of their new Windows Server product, so, the current functionality
> of checking major and minor version numbers to determine the Windows Server
> version wont work as expected.
> The implemented solution here is to use the build number in addition to the
> major and minor version numbers of the product to determine the Windows
> Server product version.
> The final build number of Windows Server 2016 is 14939, and
> the final build number of Windows Server 2019 is 17764, so any Windows
> Server product that has the major version of 10 and minor version of 0
> with a build number lower or equal to 14939 will resemble 2016 and if the
> build number is lower or equal to 17763 will resemble 2019.
> 
> Reference:
> https://techcommunity.microsoft.com/t5/Windows-Server-Insiders/Windows-Server-2019-version-info/m-p/293112/highlight/true#M859
> 
> Signed-off-by: Bishara AbuHattoum <bishara@daynix.com>
> ---
>  qga/commands-win32.c | 29 +++++++++++++++++++++++++++--
>  1 file changed, 27 insertions(+), 2 deletions(-)
> 
> diff --git a/qga/commands-win32.c b/qga/commands-win32.c
> index 62e1b51..3985b40 100644
> --- a/qga/commands-win32.c
> +++ b/qga/commands-win32.c
> @@ -2009,12 +2009,24 @@ static ga_matrix_lookup_t const WIN_VERSION_MATRIX[2][8] = {
>          { 6, 1, "Microsoft Windows Server 2008 R2",     "2008r2"},
>          { 6, 2, "Microsoft Windows Server 2012",        "2012"},
>          { 6, 3, "Microsoft Windows Server 2012 R2",     "2012r2"},
> -        {10, 0, "Microsoft Windows Server 2016",        "2016"},
> +        { 0, 0, 0},
>          { 0, 0, 0},
>          { 0, 0, 0}
>      }
>  };
>  
> +typedef struct _ga_win_10_0_server_t {
> +    int final_build;
> +    char const *version;
> +    char const *version_id;
> +} ga_win_10_0_server_t;
> +
> +static ga_win_10_0_server_t const WIN_10_0_SERVER_VERSION_MATRIX[3] = {
> +    {14393, "Microsoft Windows Server 2016",    "2016"},
> +    {17763, "Microsoft Windows Server 2019",    "2019"},
> +    {0, 0}
> +};
> +
>  static void ga_get_win_version(RTL_OSVERSIONINFOEXW *info, Error **errp)
>  {
>      typedef NTSTATUS(WINAPI * rtl_get_version_t)(
> @@ -2039,10 +2051,23 @@ static char *ga_get_win_name(OSVERSIONINFOEXW const *os_version, bool id)
>  {
>      DWORD major = os_version->dwMajorVersion;
>      DWORD minor = os_version->dwMinorVersion;
> +    DWORD build = os_version->dwBuildNumber;
>      int tbl_idx = (os_version->wProductType != VER_NT_WORKSTATION);
>      ga_matrix_lookup_t const *table = WIN_VERSION_MATRIX[tbl_idx];
> +    ga_win_10_0_server_t const *win_10_0_table = WIN_10_0_SERVER_VERSION_MATRIX;
>      while (table->version != NULL) {
> -        if (major == table->major && minor == table->minor) {
> +        if (major == 10 && minor == 0 && tbl_idx) {
> +            while (win_10_0_table->version != NULL) {
> +                if (build <= win_10_0_table->final_build) {

You should reverse the order of entries in you table for this to work,
or break after first match. Otherwise you will always match the last
entry.

    Tomas

> +                    if (id) {
> +                        return g_strdup(win_10_0_table->version_id);
> +                    } else {
> +                        return g_strdup(win_10_0_table->version);
> +                    }
> +                }
> +                win_10_0_table++;
> +            }
> +        } else if (major == table->major && minor == table->minor) {
>              if (id) {
>                  return g_strdup(table->version_id);
>              } else {
> -- 
> 1.8.3.1
> 
> 


-- 
Tomáš Golembiovský <tgolembi@redhat.com>