1. Patchew
  2. QEMU
  3. [PATCH 0/5] Enable unix socket support on Windows
  4. View patch

[PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version

Bin Meng posted 5 patches 3 years, 6 months ago
Maintainers: "Marc-André Lureau" <marcandre.lureau@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Stefan Weil <sw@weilnetz.de>, Konstantin Kostiuk <kkostiuk@redhat.com>, Michael Roth <michael.roth@amd.com>, "Daniel P. Berrangé" <berrange@redhat.com>
There is a newer version of this series
[PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Bin Meng 3 years, 6 months ago 
From: Bin Meng <bin.meng@windriver.com>

This adds a helper to get the Windows version via the RtlGetVersion
call, for QEMU codes to determine the Windows version at run-time.

Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 include/sysemu/os-win32.h |  2 ++
 util/oslib-win32.c        | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
index edc3b38a57..1e324026a4 100644
--- a/include/sysemu/os-win32.h
+++ b/include/sysemu/os-win32.h
@@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
                            struct sockaddr *addr, socklen_t *addrlen);
 
+void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/util/oslib-win32.c b/util/oslib-win32.c
index 5723d3eb4c..6d2387b9ff 100644
--- a/util/oslib-win32.c
+++ b/util/oslib-win32.c
@@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
      */
     return qemu_fdatasync(fd);
 }
+
+void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
+{
+    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
+
+    /* RtlGetVersion is available starting with Windows 2000 */
+    HMODULE module = GetModuleHandle("ntdll");
+    PVOID fun = GetProcAddress(module, "RtlGetVersion");
+    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
+
+    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
+    rtl_get_version(info);
+
+    return;
+}
-- 
2.34.1
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Yan Vugenfirer 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
>
> From: Bin Meng <bin.meng@windriver.com>
>
> This adds a helper to get the Windows version via the RtlGetVersion
> call, for QEMU codes to determine the Windows version at run-time.
>
> Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> Signed-off-by: Bin Meng <bin.meng@windriver.com>
> ---
>
>  include/sysemu/os-win32.h |  2 ++
>  util/oslib-win32.c        | 15 +++++++++++++++
>  2 files changed, 17 insertions(+)
>
> diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> index edc3b38a57..1e324026a4 100644
> --- a/include/sysemu/os-win32.h
> +++ b/include/sysemu/os-win32.h
> @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
>  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
>                             struct sockaddr *addr, socklen_t *addrlen);
>
> +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> +
>  #ifdef __cplusplus
>  }
>  #endif
> diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> index 5723d3eb4c..6d2387b9ff 100644
> --- a/util/oslib-win32.c
> +++ b/util/oslib-win32.c
> @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
>       */
>      return qemu_fdatasync(fd);
>  }
> +
> +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> +{
> +    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> +
> +    /* RtlGetVersion is available starting with Windows 2000 */
> +    HMODULE module = GetModuleHandle("ntdll");
> +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> +
> +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> +    rtl_get_version(info);
The original function, when it was present in qemu-ga, tested that
getting the function address succeeded.
I think this test should be kept.
See below:
-    PVOID fun = GetProcAddress(module, "RtlGetVersion");
-    if (fun == NULL) {
-        error_setg(errp, QERR_QGA_COMMAND_FAILED,
-            "Failed to get address of RtlGetVersion");
-        return;
-    }

Best regards,
Yan.
> +
> +    return;
> +}
> --
> 2.34.1
>
>
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Bin Meng 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com> wrote:
>
> On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
> >
> > From: Bin Meng <bin.meng@windriver.com>
> >
> > This adds a helper to get the Windows version via the RtlGetVersion
> > call, for QEMU codes to determine the Windows version at run-time.
> >
> > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> > Signed-off-by: Bin Meng <bin.meng@windriver.com>
> > ---
> >
> >  include/sysemu/os-win32.h |  2 ++
> >  util/oslib-win32.c        | 15 +++++++++++++++
> >  2 files changed, 17 insertions(+)
> >
> > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> > index edc3b38a57..1e324026a4 100644
> > --- a/include/sysemu/os-win32.h
> > +++ b/include/sysemu/os-win32.h
> > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
> >  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
> >                             struct sockaddr *addr, socklen_t *addrlen);
> >
> > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> > +
> >  #ifdef __cplusplus
> >  }
> >  #endif
> > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> > index 5723d3eb4c..6d2387b9ff 100644
> > --- a/util/oslib-win32.c
> > +++ b/util/oslib-win32.c
> > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
> >       */
> >      return qemu_fdatasync(fd);
> >  }
> > +
> > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> > +{
> > +    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> > +
> > +    /* RtlGetVersion is available starting with Windows 2000 */
> > +    HMODULE module = GetModuleHandle("ntdll");
> > +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> > +
> > +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> > +    rtl_get_version(info);
> The original function, when it was present in qemu-ga, tested that
> getting the function address succeeded.
> I think this test should be kept.
> See below:
> -    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> -    if (fun == NULL) {
> -        error_setg(errp, QERR_QGA_COMMAND_FAILED,
> -            "Failed to get address of RtlGetVersion");
> -        return;
> -    }
>

Please see the comment:

/* RtlGetVersion is available starting with Windows 2000 */

I don't think we need that check.

Regards,
Bin
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Daniel P. Berrangé 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 05:38:27PM +0800, Bin Meng wrote:
> On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com> wrote:
> >
> > On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
> > >
> > > From: Bin Meng <bin.meng@windriver.com>
> > >
> > > This adds a helper to get the Windows version via the RtlGetVersion
> > > call, for QEMU codes to determine the Windows version at run-time.
> > >
> > > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> > > Signed-off-by: Bin Meng <bin.meng@windriver.com>
> > > ---
> > >
> > >  include/sysemu/os-win32.h |  2 ++
> > >  util/oslib-win32.c        | 15 +++++++++++++++
> > >  2 files changed, 17 insertions(+)
> > >
> > > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> > > index edc3b38a57..1e324026a4 100644
> > > --- a/include/sysemu/os-win32.h
> > > +++ b/include/sysemu/os-win32.h
> > > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
> > >  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
> > >                             struct sockaddr *addr, socklen_t *addrlen);
> > >
> > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> > > +
> > >  #ifdef __cplusplus
> > >  }
> > >  #endif
> > > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> > > index 5723d3eb4c..6d2387b9ff 100644
> > > --- a/util/oslib-win32.c
> > > +++ b/util/oslib-win32.c
> > > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
> > >       */
> > >      return qemu_fdatasync(fd);
> > >  }
> > > +
> > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> > > +{
> > > +    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> > > +
> > > +    /* RtlGetVersion is available starting with Windows 2000 */
> > > +    HMODULE module = GetModuleHandle("ntdll");
> > > +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> > > +
> > > +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> > > +    rtl_get_version(info);
> > The original function, when it was present in qemu-ga, tested that
> > getting the function address succeeded.
> > I think this test should be kept.
> > See below:
> > -    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > -    if (fun == NULL) {
> > -        error_setg(errp, QERR_QGA_COMMAND_FAILED,
> > -            "Failed to get address of RtlGetVersion");
> > -        return;
> > -    }
> >
> 
> Please see the comment:
> 
> /* RtlGetVersion is available starting with Windows 2000 */
> 
> I don't think we need that check.

In include/qemu/osdep.h we have 

/* as defined in sdkddkver.h */
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0601 /* Windows 7 API (should be in sync with glib) */
#endif

so do we even need to have the GetProcAddress calls at all ?

Surely we can just  '#include <ddk/ntddk.h>' and call
RtlGetVersion directly at compile time ?


With regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Bin Meng 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 6:00 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
>
> On Wed, Jul 27, 2022 at 05:38:27PM +0800, Bin Meng wrote:
> > On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com> wrote:
> > >
> > > On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
> > > >
> > > > From: Bin Meng <bin.meng@windriver.com>
> > > >
> > > > This adds a helper to get the Windows version via the RtlGetVersion
> > > > call, for QEMU codes to determine the Windows version at run-time.
> > > >
> > > > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> > > > Signed-off-by: Bin Meng <bin.meng@windriver.com>
> > > > ---
> > > >
> > > >  include/sysemu/os-win32.h |  2 ++
> > > >  util/oslib-win32.c        | 15 +++++++++++++++
> > > >  2 files changed, 17 insertions(+)
> > > >
> > > > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> > > > index edc3b38a57..1e324026a4 100644
> > > > --- a/include/sysemu/os-win32.h
> > > > +++ b/include/sysemu/os-win32.h
> > > > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
> > > >  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
> > > >                             struct sockaddr *addr, socklen_t *addrlen);
> > > >
> > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> > > > +
> > > >  #ifdef __cplusplus
> > > >  }
> > > >  #endif
> > > > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> > > > index 5723d3eb4c..6d2387b9ff 100644
> > > > --- a/util/oslib-win32.c
> > > > +++ b/util/oslib-win32.c
> > > > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
> > > >       */
> > > >      return qemu_fdatasync(fd);
> > > >  }
> > > > +
> > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> > > > +{
> > > > +    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> > > > +
> > > > +    /* RtlGetVersion is available starting with Windows 2000 */
> > > > +    HMODULE module = GetModuleHandle("ntdll");
> > > > +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> > > > +
> > > > +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> > > > +    rtl_get_version(info);
> > > The original function, when it was present in qemu-ga, tested that
> > > getting the function address succeeded.
> > > I think this test should be kept.
> > > See below:
> > > -    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > -    if (fun == NULL) {
> > > -        error_setg(errp, QERR_QGA_COMMAND_FAILED,
> > > -            "Failed to get address of RtlGetVersion");
> > > -        return;
> > > -    }
> > >
> >
> > Please see the comment:
> >
> > /* RtlGetVersion is available starting with Windows 2000 */
> >
> > I don't think we need that check.
>
> In include/qemu/osdep.h we have
>
> /* as defined in sdkddkver.h */
> #ifndef _WIN32_WINNT
> #define _WIN32_WINNT 0x0601 /* Windows 7 API (should be in sync with glib) */
> #endif
>
> so do we even need to have the GetProcAddress calls at all ?
>
> Surely we can just  '#include <ddk/ntddk.h>' and call
> RtlGetVersion directly at compile time ?
>

I believe #include <ddk/ntddk.h> is used in the kernel mode driver
programming environment.
In the user space we will have to use the ntdll exported symbol.

I cannot locate a Microsoft doc that tells us to call RtlGetVersion
directly in the user space.

Regards,
Bin
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Konstantin Kostiuk 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 2:58 PM Bin Meng <bmeng.cn@gmail.com> wrote:

> On Wed, Jul 27, 2022 at 6:00 PM Daniel P. Berrangé <berrange@redhat.com>
> wrote:
> >
> > On Wed, Jul 27, 2022 at 05:38:27PM +0800, Bin Meng wrote:
> > > On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com>
> wrote:
> > > >
> > > > On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com>
> wrote:
> > > > >
> > > > > From: Bin Meng <bin.meng@windriver.com>
> > > > >
> > > > > This adds a helper to get the Windows version via the RtlGetVersion
> > > > > call, for QEMU codes to determine the Windows version at run-time.
> > > > >
> > > > > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> > > > > Signed-off-by: Bin Meng <bin.meng@windriver.com>
> > > > > ---
> > > > >
> > > > >  include/sysemu/os-win32.h |  2 ++
> > > > >  util/oslib-win32.c        | 15 +++++++++++++++
> > > > >  2 files changed, 17 insertions(+)
> > > > >
> > > > > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> > > > > index edc3b38a57..1e324026a4 100644
> > > > > --- a/include/sysemu/os-win32.h
> > > > > +++ b/include/sysemu/os-win32.h
> > > > > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf,
> size_t len, int flags);
> > > > >  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int
> flags,
> > > > >                             struct sockaddr *addr, socklen_t
> *addrlen);
> > > > >
> > > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> > > > > +
> > > > >  #ifdef __cplusplus
> > > > >  }
> > > > >  #endif
> > > > > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> > > > > index 5723d3eb4c..6d2387b9ff 100644
> > > > > --- a/util/oslib-win32.c
> > > > > +++ b/util/oslib-win32.c
> > > > > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int
> fd)
> > > > >       */
> > > > >      return qemu_fdatasync(fd);
> > > > >  }
> > > > > +
> > > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> > > > > +{
> > > > > +    typedef LONG (WINAPI
> *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> > > > > +
> > > > > +    /* RtlGetVersion is available starting with Windows 2000 */
> > > > > +    HMODULE module = GetModuleHandle("ntdll");
> > > > > +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > > +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> > > > > +
> > > > > +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> > > > > +    rtl_get_version(info);
> > > > The original function, when it was present in qemu-ga, tested that
> > > > getting the function address succeeded.
> > > > I think this test should be kept.
> > > > See below:
> > > > -    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > -    if (fun == NULL) {
> > > > -        error_setg(errp, QERR_QGA_COMMAND_FAILED,
> > > > -            "Failed to get address of RtlGetVersion");
> > > > -        return;
> > > > -    }
> > > >
> > >
> > > Please see the comment:
> > >
> > > /* RtlGetVersion is available starting with Windows 2000 */
> > >
> > > I don't think we need that check.
> >
> > In include/qemu/osdep.h we have
> >
> > /* as defined in sdkddkver.h */
> > #ifndef _WIN32_WINNT
> > #define _WIN32_WINNT 0x0601 /* Windows 7 API (should be in sync with
> glib) */
> > #endif
> >
> > so do we even need to have the GetProcAddress calls at all ?
> >
> > Surely we can just  '#include <ddk/ntddk.h>' and call
> > RtlGetVersion directly at compile time ?
> >
>
> I believe #include <ddk/ntddk.h> is used in the kernel mode driver
> programming environment.
> In the user space we will have to use the ntdll exported symbol.
>
> I cannot locate a Microsoft doc that tells us to call RtlGetVersion
> directly in the user space.
>

From MS docs: RtlGetVersion is the kernel-mode equivalent of the user-mode
GetVersionEx function in the Windows SDK.
So you can use GetVersionEx instread.


>
> Regards,
> Bin
>
>
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Bin Meng 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 9:18 PM Konstantin Kostiuk <kkostiuk@redhat.com> wrote:
>
>
>
> On Wed, Jul 27, 2022 at 2:58 PM Bin Meng <bmeng.cn@gmail.com> wrote:
>>
>> On Wed, Jul 27, 2022 at 6:00 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
>> >
>> > On Wed, Jul 27, 2022 at 05:38:27PM +0800, Bin Meng wrote:
>> > > On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com> wrote:
>> > > >
>> > > > On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
>> > > > >
>> > > > > From: Bin Meng <bin.meng@windriver.com>
>> > > > >
>> > > > > This adds a helper to get the Windows version via the RtlGetVersion
>> > > > > call, for QEMU codes to determine the Windows version at run-time.
>> > > > >
>> > > > > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
>> > > > > Signed-off-by: Bin Meng <bin.meng@windriver.com>
>> > > > > ---
>> > > > >
>> > > > >  include/sysemu/os-win32.h |  2 ++
>> > > > >  util/oslib-win32.c        | 15 +++++++++++++++
>> > > > >  2 files changed, 17 insertions(+)
>> > > > >
>> > > > > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
>> > > > > index edc3b38a57..1e324026a4 100644
>> > > > > --- a/include/sysemu/os-win32.h
>> > > > > +++ b/include/sysemu/os-win32.h
>> > > > > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
>> > > > >  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
>> > > > >                             struct sockaddr *addr, socklen_t *addrlen);
>> > > > >
>> > > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
>> > > > > +
>> > > > >  #ifdef __cplusplus
>> > > > >  }
>> > > > >  #endif
>> > > > > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
>> > > > > index 5723d3eb4c..6d2387b9ff 100644
>> > > > > --- a/util/oslib-win32.c
>> > > > > +++ b/util/oslib-win32.c
>> > > > > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
>> > > > >       */
>> > > > >      return qemu_fdatasync(fd);
>> > > > >  }
>> > > > > +
>> > > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
>> > > > > +{
>> > > > > +    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
>> > > > > +
>> > > > > +    /* RtlGetVersion is available starting with Windows 2000 */
>> > > > > +    HMODULE module = GetModuleHandle("ntdll");
>> > > > > +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
>> > > > > +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
>> > > > > +
>> > > > > +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
>> > > > > +    rtl_get_version(info);
>> > > > The original function, when it was present in qemu-ga, tested that
>> > > > getting the function address succeeded.
>> > > > I think this test should be kept.
>> > > > See below:
>> > > > -    PVOID fun = GetProcAddress(module, "RtlGetVersion");
>> > > > -    if (fun == NULL) {
>> > > > -        error_setg(errp, QERR_QGA_COMMAND_FAILED,
>> > > > -            "Failed to get address of RtlGetVersion");
>> > > > -        return;
>> > > > -    }
>> > > >
>> > >
>> > > Please see the comment:
>> > >
>> > > /* RtlGetVersion is available starting with Windows 2000 */
>> > >
>> > > I don't think we need that check.
>> >
>> > In include/qemu/osdep.h we have
>> >
>> > /* as defined in sdkddkver.h */
>> > #ifndef _WIN32_WINNT
>> > #define _WIN32_WINNT 0x0601 /* Windows 7 API (should be in sync with glib) */
>> > #endif
>> >
>> > so do we even need to have the GetProcAddress calls at all ?
>> >
>> > Surely we can just  '#include <ddk/ntddk.h>' and call
>> > RtlGetVersion directly at compile time ?
>> >
>>
>> I believe #include <ddk/ntddk.h> is used in the kernel mode driver
>> programming environment.
>> In the user space we will have to use the ntdll exported symbol.
>>
>> I cannot locate a Microsoft doc that tells us to call RtlGetVersion
>> directly in the user space.
>
>
> From MS docs: RtlGetVersion is the kernel-mode equivalent of the user-mode GetVersionEx function in the Windows SDK.
> So you can use GetVersionEx instread.
>

Unfortunately this does not work. GetVersionEx is deprecated since Windows 8.1

Regards,
Bin
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Daniel P. Berrangé 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 07:55:40PM +0800, Bin Meng wrote:
> On Wed, Jul 27, 2022 at 6:00 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
> >
> > On Wed, Jul 27, 2022 at 05:38:27PM +0800, Bin Meng wrote:
> > > On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com> wrote:
> > > >
> > > > On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
> > > > >
> > > > > From: Bin Meng <bin.meng@windriver.com>
> > > > >
> > > > > This adds a helper to get the Windows version via the RtlGetVersion
> > > > > call, for QEMU codes to determine the Windows version at run-time.
> > > > >
> > > > > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> > > > > Signed-off-by: Bin Meng <bin.meng@windriver.com>
> > > > > ---
> > > > >
> > > > >  include/sysemu/os-win32.h |  2 ++
> > > > >  util/oslib-win32.c        | 15 +++++++++++++++
> > > > >  2 files changed, 17 insertions(+)
> > > > >
> > > > > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> > > > > index edc3b38a57..1e324026a4 100644
> > > > > --- a/include/sysemu/os-win32.h
> > > > > +++ b/include/sysemu/os-win32.h
> > > > > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
> > > > >  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
> > > > >                             struct sockaddr *addr, socklen_t *addrlen);
> > > > >
> > > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> > > > > +
> > > > >  #ifdef __cplusplus
> > > > >  }
> > > > >  #endif
> > > > > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> > > > > index 5723d3eb4c..6d2387b9ff 100644
> > > > > --- a/util/oslib-win32.c
> > > > > +++ b/util/oslib-win32.c
> > > > > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
> > > > >       */
> > > > >      return qemu_fdatasync(fd);
> > > > >  }
> > > > > +
> > > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> > > > > +{
> > > > > +    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> > > > > +
> > > > > +    /* RtlGetVersion is available starting with Windows 2000 */
> > > > > +    HMODULE module = GetModuleHandle("ntdll");
> > > > > +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > > +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> > > > > +
> > > > > +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> > > > > +    rtl_get_version(info);
> > > > The original function, when it was present in qemu-ga, tested that
> > > > getting the function address succeeded.
> > > > I think this test should be kept.
> > > > See below:
> > > > -    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > -    if (fun == NULL) {
> > > > -        error_setg(errp, QERR_QGA_COMMAND_FAILED,
> > > > -            "Failed to get address of RtlGetVersion");
> > > > -        return;
> > > > -    }
> > > >
> > >
> > > Please see the comment:
> > >
> > > /* RtlGetVersion is available starting with Windows 2000 */
> > >
> > > I don't think we need that check.
> >
> > In include/qemu/osdep.h we have
> >
> > /* as defined in sdkddkver.h */
> > #ifndef _WIN32_WINNT
> > #define _WIN32_WINNT 0x0601 /* Windows 7 API (should be in sync with glib) */
> > #endif
> >
> > so do we even need to have the GetProcAddress calls at all ?
> >
> > Surely we can just  '#include <ddk/ntddk.h>' and call
> > RtlGetVersion directly at compile time ?
> >
> 
> I believe #include <ddk/ntddk.h> is used in the kernel mode driver
> programming environment.
> In the user space we will have to use the ntdll exported symbol.
> 
> I cannot locate a Microsoft doc that tells us to call RtlGetVersion
> directly in the user space.

I wonder if we actually need to add this helper API to QEMU at all.

Would it be possible to use GLib 's  g_win32_check_windows_version API
instead ?

https://developer-old.gnome.org/glib/unstable/glib-Windows-Compatibility-Functions.html#g-win32-check-windows-version

With regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Bin Meng 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 8:53 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
>
> On Wed, Jul 27, 2022 at 07:55:40PM +0800, Bin Meng wrote:
> > On Wed, Jul 27, 2022 at 6:00 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
> > >
> > > On Wed, Jul 27, 2022 at 05:38:27PM +0800, Bin Meng wrote:
> > > > On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com> wrote:
> > > > >
> > > > > On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
> > > > > >
> > > > > > From: Bin Meng <bin.meng@windriver.com>
> > > > > >
> > > > > > This adds a helper to get the Windows version via the RtlGetVersion
> > > > > > call, for QEMU codes to determine the Windows version at run-time.
> > > > > >
> > > > > > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> > > > > > Signed-off-by: Bin Meng <bin.meng@windriver.com>
> > > > > > ---
> > > > > >
> > > > > >  include/sysemu/os-win32.h |  2 ++
> > > > > >  util/oslib-win32.c        | 15 +++++++++++++++
> > > > > >  2 files changed, 17 insertions(+)
> > > > > >
> > > > > > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> > > > > > index edc3b38a57..1e324026a4 100644
> > > > > > --- a/include/sysemu/os-win32.h
> > > > > > +++ b/include/sysemu/os-win32.h
> > > > > > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
> > > > > >  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
> > > > > >                             struct sockaddr *addr, socklen_t *addrlen);
> > > > > >
> > > > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> > > > > > +
> > > > > >  #ifdef __cplusplus
> > > > > >  }
> > > > > >  #endif
> > > > > > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> > > > > > index 5723d3eb4c..6d2387b9ff 100644
> > > > > > --- a/util/oslib-win32.c
> > > > > > +++ b/util/oslib-win32.c
> > > > > > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
> > > > > >       */
> > > > > >      return qemu_fdatasync(fd);
> > > > > >  }
> > > > > > +
> > > > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> > > > > > +{
> > > > > > +    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> > > > > > +
> > > > > > +    /* RtlGetVersion is available starting with Windows 2000 */
> > > > > > +    HMODULE module = GetModuleHandle("ntdll");
> > > > > > +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > > > +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> > > > > > +
> > > > > > +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> > > > > > +    rtl_get_version(info);
> > > > > The original function, when it was present in qemu-ga, tested that
> > > > > getting the function address succeeded.
> > > > > I think this test should be kept.
> > > > > See below:
> > > > > -    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > > -    if (fun == NULL) {
> > > > > -        error_setg(errp, QERR_QGA_COMMAND_FAILED,
> > > > > -            "Failed to get address of RtlGetVersion");
> > > > > -        return;
> > > > > -    }
> > > > >
> > > >
> > > > Please see the comment:
> > > >
> > > > /* RtlGetVersion is available starting with Windows 2000 */
> > > >
> > > > I don't think we need that check.
> > >
> > > In include/qemu/osdep.h we have
> > >
> > > /* as defined in sdkddkver.h */
> > > #ifndef _WIN32_WINNT
> > > #define _WIN32_WINNT 0x0601 /* Windows 7 API (should be in sync with glib) */
> > > #endif
> > >
> > > so do we even need to have the GetProcAddress calls at all ?
> > >
> > > Surely we can just  '#include <ddk/ntddk.h>' and call
> > > RtlGetVersion directly at compile time ?
> > >
> >
> > I believe #include <ddk/ntddk.h> is used in the kernel mode driver
> > programming environment.
> > In the user space we will have to use the ntdll exported symbol.
> >
> > I cannot locate a Microsoft doc that tells us to call RtlGetVersion
> > directly in the user space.
>
> I wonder if we actually need to add this helper API to QEMU at all.
>
> Would it be possible to use GLib 's  g_win32_check_windows_version API
> instead ?
>
> https://developer-old.gnome.org/glib/unstable/glib-Windows-Compatibility-Functions.html#g-win32-check-windows-version
>

I am afraid not. g_win32_check_windows_version API does not provide
detailed build number like RtlGetVersion does.

Regards,
Bin
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version
Posted by Yan Vugenfirer 3 years, 6 months ago 
On Wed, Jul 27, 2022 at 1:00 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
>
> On Wed, Jul 27, 2022 at 05:38:27PM +0800, Bin Meng wrote:
> > On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com> wrote:
> > >
> > > On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
> > > >
> > > > From: Bin Meng <bin.meng@windriver.com>
> > > >
> > > > This adds a helper to get the Windows version via the RtlGetVersion
> > > > call, for QEMU codes to determine the Windows version at run-time.
> > > >
> > > > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> > > > Signed-off-by: Bin Meng <bin.meng@windriver.com>
> > > > ---
> > > >
> > > >  include/sysemu/os-win32.h |  2 ++
> > > >  util/oslib-win32.c        | 15 +++++++++++++++
> > > >  2 files changed, 17 insertions(+)
> > > >
> > > > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> > > > index edc3b38a57..1e324026a4 100644
> > > > --- a/include/sysemu/os-win32.h
> > > > +++ b/include/sysemu/os-win32.h
> > > > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
> > > >  ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
> > > >                             struct sockaddr *addr, socklen_t *addrlen);
> > > >
> > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> > > > +
> > > >  #ifdef __cplusplus
> > > >  }
> > > >  #endif
> > > > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> > > > index 5723d3eb4c..6d2387b9ff 100644
> > > > --- a/util/oslib-win32.c
> > > > +++ b/util/oslib-win32.c
> > > > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
> > > >       */
> > > >      return qemu_fdatasync(fd);
> > > >  }
> > > > +
> > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> > > > +{
> > > > +    typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> > > > +
> > > > +    /* RtlGetVersion is available starting with Windows 2000 */
> > > > +    HMODULE module = GetModuleHandle("ntdll");
> > > > +    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > +    rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> > > > +
> > > > +    info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> > > > +    rtl_get_version(info);
> > > The original function, when it was present in qemu-ga, tested that
> > > getting the function address succeeded.
> > > I think this test should be kept.
> > > See below:
> > > -    PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > -    if (fun == NULL) {
> > > -        error_setg(errp, QERR_QGA_COMMAND_FAILED,
> > > -            "Failed to get address of RtlGetVersion");
> > > -        return;
> > > -    }
> > >
> >
> > Please see the comment:
> >
> > /* RtlGetVersion is available starting with Windows 2000 */
> >
> > I don't think we need that check.
>
> In include/qemu/osdep.h we have
>
> /* as defined in sdkddkver.h */
> #ifndef _WIN32_WINNT
> #define _WIN32_WINNT 0x0601 /* Windows 7 API (should be in sync with glib) */
> #endif
>
> so do we even need to have the GetProcAddress calls at all ?
>
> Surely we can just  '#include <ddk/ntddk.h>' and call
> RtlGetVersion directly at compile time ?
Yes.
https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-rtlgetversion
- RtlGetVersion is available from Windows 2000.

Best regards,
Yan.

>
>
> With regards,
> Daniel
> --
> |: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
> |: https://libvirt.org         -o-            https://fstop138.berrange.com :|
> |: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|
>

Patchew 2.1-devel-b67e4c2

© 2016 - 2026 Red Hat, Inc.