[Qemu-devel] [PATCH] linux-user: fix includes to find SIOCGSTAMP with latest kernel headers

["Daniel P. Berrangé" <berrange@redhat.com>]

The SIOCGSTAMP symbol was previously defined in the
asm-generic/sockios.h header file. QEMU sees that header
indirectly via

   sys/socket.h
    -> bits/socket.h
        -> asm/socket.h
            -> asm-generic/socket.h
                -> asm/sockios.h
                    -> asm-generic/sockios.h

In linux kernel commit 0768e17073dc527ccd18ed5f96ce85f9985e9115
the asm-generic/sockios.h header no longer defines SIOCGSTAMP.
Instead it provides only SIOCGSTAMP_OLD.

The linux/sockios.h header now defines SIOCGSTAMP using either
SIOCGSTAMP_OLD or SIOCGSTAMP_NEW as appropriate. This linux only
header file is not pulled in by QEMU though, so we get a build
failure:

qemu/linux-user/ioctls.h:225:9: error: ‘SIOCGSTAMP’ undeclared here (not in a function); did you mean ‘SIOCSRARP’?
  225 |   IOCTL(SIOCGSTAMP, IOC_R, MK_PTR(MK_STRUCT(STRUCT_timeval)))
      |         ^~~~~~~~~~
qemu/linux-user/syscall.c:4855:23: note: in definition of macro ‘IOCTL’
 4855 |     { TARGET_ ## cmd, cmd, #cmd, access, 0, {  __VA_ARGS__ } },
      |                       ^~~
qemu/linux-user/ioctls.h:226:9: error: ‘SIOCGSTAMPNS’ undeclared here (not in a function); did you mean ‘SIOCGSTAMP_OLD’?
  226 |   IOCTL(SIOCGSTAMPNS, IOC_R, MK_PTR(MK_STRUCT(STRUCT_timespec)))
      |         ^~~~~~~~~~~~
qemu/linux-user/syscall.c:4855:23: note: in definition of macro ‘IOCTL’
 4855 |     { TARGET_ ## cmd, cmd, #cmd, access, 0, {  __VA_ARGS__ } },
      |                       ^~~

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 linux-user/syscall.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index b187c1281d..f13e260b02 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -37,6 +37,7 @@
 #include <sched.h>
 #include <sys/timex.h>
 #include <sys/socket.h>
+#include <linux/sockios.h>
 #include <sys/un.h>
 #include <sys/uio.h>
 #include <poll.h>
-- 
2.21.0