2012-10-09 02:47:14 -06:00
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1997, 1999, 2000, 2001 Ralf Baechle
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* Copyright (C) 2000, 2001 Silicon Graphics, Inc.
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*/
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#ifndef _UAPI_ASM_SOCKET_H
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#define _UAPI_ASM_SOCKET_H
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#include <asm/sockios.h>
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/*
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* For setsockopt(2)
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*
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* This defines are ABI conformant as far as Linux supports these ...
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*/
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#define SOL_SOCKET 0xffff
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#define SO_DEBUG 0x0001 /* Record debugging information. */
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#define SO_REUSEADDR 0x0004 /* Allow reuse of local addresses. */
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#define SO_KEEPALIVE 0x0008 /* Keep connections alive and send
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SIGPIPE when they die. */
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#define SO_DONTROUTE 0x0010 /* Don't do local routing. */
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#define SO_BROADCAST 0x0020 /* Allow transmission of
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2013-01-22 04:59:30 -07:00
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broadcast messages. */
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2012-10-09 02:47:14 -06:00
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#define SO_LINGER 0x0080 /* Block on close of a reliable
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socket to transmit pending data. */
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#define SO_OOBINLINE 0x0100 /* Receive out-of-band data in-band. */
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2013-01-22 02:49:50 -07:00
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#define SO_REUSEPORT 0x0200 /* Allow local address and port reuse. */
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2012-10-09 02:47:14 -06:00
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#define SO_TYPE 0x1008 /* Compatible name for SO_STYLE. */
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#define SO_STYLE SO_TYPE /* Synonym */
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2012-10-09 02:47:14 -06:00
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#define SO_ERROR 0x1007 /* get error status and clear */
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#define SO_SNDBUF 0x1001 /* Send buffer size. */
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#define SO_RCVBUF 0x1002 /* Receive buffer. */
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#define SO_SNDLOWAT 0x1003 /* send low-water mark */
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#define SO_RCVLOWAT 0x1004 /* receive low-water mark */
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#define SO_SNDTIMEO 0x1005 /* send timeout */
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#define SO_RCVTIMEO 0x1006 /* receive timeout */
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2012-10-09 02:47:14 -06:00
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#define SO_ACCEPTCONN 0x1009
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#define SO_PROTOCOL 0x1028 /* protocol type */
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#define SO_DOMAIN 0x1029 /* domain/socket family */
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/* linux-specific, might as well be the same as on i386 */
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#define SO_NO_CHECK 11
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#define SO_PRIORITY 12
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#define SO_BSDCOMPAT 14
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#define SO_PASSCRED 17
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#define SO_PEERCRED 18
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/* Security levels - as per NRL IPv6 - don't actually do anything */
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#define SO_SECURITY_AUTHENTICATION 22
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#define SO_SECURITY_ENCRYPTION_TRANSPORT 23
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#define SO_SECURITY_ENCRYPTION_NETWORK 24
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#define SO_BINDTODEVICE 25
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/* Socket filtering */
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2013-01-22 04:59:30 -07:00
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#define SO_ATTACH_FILTER 26
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#define SO_DETACH_FILTER 27
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sk-filter: Add ability to get socket filter program (v2)
The SO_ATTACH_FILTER option is set only. I propose to add the get
ability by using SO_ATTACH_FILTER in getsockopt. To be less
irritating to eyes the SO_GET_FILTER alias to it is declared. This
ability is required by checkpoint-restore project to be able to
save full state of a socket.
There are two issues with getting filter back.
First, kernel modifies the sock_filter->code on filter load, thus in
order to return the filter element back to user we have to decode it
into user-visible constants. Fortunately the modification in question
is interconvertible.
Second, the BPF_S_ALU_DIV_K code modifies the command argument k to
speed up the run-time division by doing kernel_k = reciprocal(user_k).
Bad news is that different user_k may result in same kernel_k, so we
can't get the original user_k back. Good news is that we don't have
to do it. What we need to is calculate a user2_k so, that
reciprocal(user2_k) == reciprocal(user_k) == kernel_k
i.e. if it's re-loaded back the compiled again value will be exactly
the same as it was. That said, the user2_k can be calculated like this
user2_k = reciprocal(kernel_k)
with an exception, that if kernel_k == 0, then user2_k == 1.
The optlen argument is treated like this -- when zero, kernel returns
the amount of sock_fprog elements in filter, otherwise it should be
large enough for the sock_fprog array.
changes since v1:
* Declared SO_GET_FILTER in all arch headers
* Added decode of vlan-tag codes
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-10-31 20:01:48 -06:00
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#define SO_GET_FILTER SO_ATTACH_FILTER
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2013-01-22 04:59:30 -07:00
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#define SO_PEERNAME 28
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2012-10-09 02:47:14 -06:00
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#define SO_TIMESTAMP 29
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#define SCM_TIMESTAMP SO_TIMESTAMP
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#define SO_PEERSEC 30
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#define SO_SNDBUFFORCE 31
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#define SO_RCVBUFFORCE 33
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#define SO_PASSSEC 34
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#define SO_TIMESTAMPING 37
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#define SCM_TIMESTAMPING SO_TIMESTAMPING
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2013-01-22 04:59:30 -07:00
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#define SO_RXQ_OVFL 40
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2012-10-09 02:47:14 -06:00
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#define SO_WIFI_STATUS 41
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#define SCM_WIFI_STATUS SO_WIFI_STATUS
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#define SO_PEEK_OFF 42
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/* Instruct lower device to use last 4-bytes of skb data as FCS */
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#define SO_NOFCS 43
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2013-01-16 14:55:49 -07:00
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#define SO_LOCK_FILTER 44
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2012-10-09 02:47:14 -06:00
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2013-03-28 05:19:25 -06:00
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#define SO_SELECT_ERR_QUEUE 45
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2013-07-10 08:13:36 -06:00
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#define SO_BUSY_POLL 46
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2013-06-14 07:33:57 -06:00
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2013-09-24 09:20:52 -06:00
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#define SO_MAX_PACING_RATE 47
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2014-01-17 09:09:45 -07:00
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#define SO_BPF_EXTENSIONS 48
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net: introduce SO_INCOMING_CPU
Alternative to RPS/RFS is to use hardware support for multiple
queues.
Then split a set of million of sockets into worker threads, each
one using epoll() to manage events on its own socket pool.
Ideally, we want one thread per RX/TX queue/cpu, but we have no way to
know after accept() or connect() on which queue/cpu a socket is managed.
We normally use one cpu per RX queue (IRQ smp_affinity being properly
set), so remembering on socket structure which cpu delivered last packet
is enough to solve the problem.
After accept(), connect(), or even file descriptor passing around
processes, applications can use :
int cpu;
socklen_t len = sizeof(cpu);
getsockopt(fd, SOL_SOCKET, SO_INCOMING_CPU, &cpu, &len);
And use this information to put the socket into the right silo
for optimal performance, as all networking stack should run
on the appropriate cpu, without need to send IPI (RPS/RFS).
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-11 06:54:28 -07:00
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#define SO_INCOMING_CPU 49
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2014-12-01 16:06:35 -07:00
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#define SO_ATTACH_BPF 50
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#define SO_DETACH_BPF SO_DETACH_FILTER
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2016-01-04 15:41:47 -07:00
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#define SO_ATTACH_REUSEPORT_CBPF 51
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#define SO_ATTACH_REUSEPORT_EBPF 52
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2016-02-24 11:02:52 -07:00
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#define SO_CNX_ADVICE 53
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2016-11-28 00:07:18 -07:00
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#define SCM_TIMESTAMPING_OPT_STATS 54
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2017-03-20 13:22:03 -06:00
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#define SO_MEMINFO 55
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2017-03-24 11:08:36 -06:00
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#define SO_INCOMING_NAPI_ID 56
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2017-03-20 13:22:03 -06:00
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2017-04-05 20:00:55 -06:00
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#define SO_COOKIE 57
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2012-10-09 02:47:14 -06:00
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#endif /* _UAPI_ASM_SOCKET_H */
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