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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/sparc | |
| parent | 52267790ef52d7513879238ca9fac22c1733e0e3 (diff) | |
| download | linux-0-day-76851d1212c11365362525e1e2c0a18c97478e6b.tar.gz linux-0-day-76851d1212c11365362525e1e2c0a18c97478e6b.tar.xz | |
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/sparc')
| -rw-r--r-- | arch/sparc/include/uapi/asm/socket.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h index 186fd8199f548..b2f5c50d09474 100644 --- a/arch/sparc/include/uapi/asm/socket.h +++ b/arch/sparc/include/uapi/asm/socket.h @@ -98,6 +98,8 @@ #define SO_PEERGROUPS 0x003d +#define SO_ZEROCOPY 0x003e + /* Security levels - as per NRL IPv6 - don't actually do anything */ #define SO_SECURITY_AUTHENTICATION 0x5001 #define SO_SECURITY_ENCRYPTION_TRANSPORT 0x5002 |