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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
..
alpha sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
arc dma-coherent: introduce interface for default DMA pool 2017-07-20 16:09:10 +02:00
arm arm64 fixes: 2017-07-28 13:29:36 -07:00
arm64 arm64 fixes: 2017-07-28 13:29:36 -07:00
blackfin Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-07-21 10:41:19 -07:00
c6x Merge branch 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-15 11:17:52 -07:00
cris Kbuild updates for v4.13 (2nd) 2017-07-13 13:37:57 -07:00
frv sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
h8300 h8300: Add missing closing parenthesis in flat_get_addr_from_rp() 2017-07-16 09:24:06 -07:00
hexagon
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ia64 sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
m32r sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
m68k blackfin, m68k: Fix flat_set_persistent() for unsigned long to u32 changes 2017-07-16 09:24:06 -07:00
metag metag: move generic-y of exported headers to uapi/asm/Kbuild 2017-07-10 03:43:30 +09:00
microblaze Merge branch 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-15 11:17:52 -07:00
mips sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
mn10300 sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
nios2 nios2: move generic-y of exported headers to uapi/asm/Kbuild 2017-07-11 21:33:43 +09:00
openrisc openrisc: move generic-y of exported headers to uapi/asm/Kbuild 2017-07-11 21:33:50 +09:00
parisc sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
powerpc s390: SRCU fix. 2017-07-28 13:36:56 -07:00
s390 sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
score
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sh TTY/Serial fixes for 4.13-rc2 2017-07-22 09:00:24 -07:00
sparc sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
tile Merge branch 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-15 11:17:52 -07:00
um Merge branch 'for-linus-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml 2017-07-15 10:49:33 -07:00
unicore32 unicore32: move generic-y of exported headers to uapi/asm/Kbuild 2017-07-11 21:33:52 +09:00
x86 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-07-30 12:19:35 -07:00
xtensa sock: add SOCK_ZEROCOPY sockopt 2017-08-03 21:37:29 -07:00
.gitignore
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Kconfig include/linux/string.h: add the option of fortified string.h functions 2017-07-12 16:26:03 -07:00