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| author |   Willem de Bruijn <willemb@google.com> | 2017-08-03 16:29:40 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-08-03 21:37:29 -0700 |
| commit | 76851d1212c11365362525e1e2c0a18c97478e6b (patch) | |
| tree | a9f9c1795f51c31d46e8282674e5d45f46ce1cbe /arch/s390/include/uapi | |
| parent | sock: add MSG_ZEROCOPY (diff) | |
| download | linux-dev-76851d1212c11365362525e1e2c0a18c97478e6b.tar.xz linux-dev-76851d1212c11365362525e1e2c0a18c97478e6b.zip | |
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 'arch/s390/include/uapi')
| -rw-r--r-- | arch/s390/include/uapi/asm/socket.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/socket.h b/arch/s390/include/uapi/asm/socket.h index 52a63f4175cb..a56916c83565 100644 --- a/arch/s390/include/uapi/asm/socket.h +++ b/arch/s390/include/uapi/asm/socket.h @@ -108,4 +108,6 @@ #define SO_PEERGROUPS 59 +#define SO_ZEROCOPY 60 + #endif /* _ASM_SOCKET_H */ |