From 76851d1212c11365362525e1e2c0a18c97478e6b Mon Sep 17 00:00:00 2001 From: Willem de Bruijn Date: Thu, 3 Aug 2017 16:29:40 -0400 Subject: sock: add SOCK_ZEROCOPY sockopt The send call ignores unknown flags. Legacy applications may already unwittingly pass MSG_ZEROCOPY. Continue to ignore this flag unless a socket opts in to zerocopy. Introduce socket option SO_ZEROCOPY to enable MSG_ZEROCOPY processing. Processes can also query this socket option to detect kernel support for the feature. Older kernels will return ENOPROTOOPT. Signed-off-by: Willem de Bruijn Signed-off-by: David S. Miller --- arch/xtensa/include/uapi/asm/socket.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/xtensa') diff --git a/arch/xtensa/include/uapi/asm/socket.h b/arch/xtensa/include/uapi/asm/socket.h index 3eed2761c149..220059999e74 100644 --- a/arch/xtensa/include/uapi/asm/socket.h +++ b/arch/xtensa/include/uapi/asm/socket.h @@ -113,4 +113,6 @@ #define SO_PEERGROUPS 59 +#define SO_ZEROCOPY 60 + #endif /* _XTENSA_SOCKET_H */ -- cgit v1.2.3