[Qemu-trivial] [PATCH] linux-user: Support the accept4 socketcall

["André Hentschel" <nerv@dawncrow.de>]

From: André Hentschel <nerv@dawncrow.de>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: André Hentschel <nerv@dawncrow.de>
---
See https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/net.h for the values.
Not entirely sure how to implement recvmmsg and sendmmsg...
PS: I hit send to early on the last attempt, sry.

 linux-user/syscall.c      | 15 +++++++++++++++
 linux-user/syscall_defs.h |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index efd1453..475fb8c 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -2245,6 +2245,21 @@ static abi_long do_socketcall(int num, abi_ulong vptr)
             ret = do_accept4(sockfd, target_addr, target_addrlen, 0);
         }
         break;
+    case SOCKOP_accept4:
+        {
+            abi_ulong sockfd;
+            abi_ulong target_addr, target_addrlen;
+            abi_ulong flags;
+
+            if (get_user_ual(sockfd, vptr)
+                || get_user_ual(target_addr, vptr + n)
+                || get_user_ual(target_addrlen, vptr + 2 * n)
+                || get_user_ual(flags, vptr + 3 * n))
+                return -TARGET_EFAULT;
+
+            ret = do_accept4(sockfd, target_addr, target_addrlen, flags);
+        }
+        break;
     case SOCKOP_getsockname:
         {
             abi_ulong sockfd;
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index cf08db5..b36f99c 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -27,6 +27,9 @@
 #define SOCKOP_getsockopt       15
 #define SOCKOP_sendmsg          16
 #define SOCKOP_recvmsg          17
+#define SOCKOP_accept4          18
+#define SOCKOP_recvmmsg         19
+#define SOCKOP_sendmmsg         20
 
 #define IPCOP_semop		1
 #define IPCOP_semget		2
-- 
1.8.1.2