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authorWillem de Bruijn <willemb@google.com>2017-08-03 16:29:40 -0400
committerDavid S. Miller <davem@davemloft.net>2017-08-03 21:37:29 -0700
commit76851d1212c11365362525e1e2c0a18c97478e6b (patch)
treea9f9c1795f51c31d46e8282674e5d45f46ce1cbe /include/uapi/asm-generic
parent52267790ef52d7513879238ca9fac22c1733e0e3 (diff)
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 <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/asm-generic')
-rw-r--r--include/uapi/asm-generic/socket.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index 9861be8da65e..e47c9e436221 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -104,4 +104,6 @@
#define SO_PEERGROUPS 59
+#define SO_ZEROCOPY 60
+
#endif /* __ASM_GENERIC_SOCKET_H */

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