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Willem de Bruijn 76851d1212 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>
2017-08-03 21:37:29 -07:00
..
boot Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
include sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
kernel osf_sigstack(): switch to put_user() 2017-05-27 16:38:39 -04:00
lib Kbuild updates for v4.12 2017-05-10 20:11:05 -07:00
math-emu sched/headers: Prepare for the removal of <asm/ptrace.h> from <linux/sched.h> 2017-03-02 08:42:31 +01:00
mm sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
oprofile alpha: delete non-required instances of <linux/init.h> 2015-05-26 10:01:48 -07:00
Kconfig CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now 2017-04-26 12:11:01 -04:00
Kconfig.debug alpha/parisc: remove config variable DEBUG_RWLOCK 2008-02-06 10:41:03 -08:00
Makefile alpha: makefile: don't enforce small data model for kernel builds 2013-04-07 12:59:30 -07:00
defconfig defconfig reduction 2010-08-14 22:26:53 +02:00