2017-11-01 08:08:43 -06:00
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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2012-12-17 06:47:09 -07:00
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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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/* For setsockopt(2) */
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/*
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* Note: we only bother about making the SOL_SOCKET options
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* same as OSF/1, as that's all that "normal" programs are
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* likely to set. We don't necessarily want to be binary
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* compatible with _everything_.
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*/
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#define SOL_SOCKET 0xffff
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#define SO_DEBUG 0x0001
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#define SO_REUSEADDR 0x0004
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#define SO_KEEPALIVE 0x0008
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#define SO_DONTROUTE 0x0010
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#define SO_BROADCAST 0x0020
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#define SO_LINGER 0x0080
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#define SO_OOBINLINE 0x0100
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2013-01-22 02:49:50 -07:00
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#define SO_REUSEPORT 0x0200
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2012-12-17 06:47:09 -07:00
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#define SO_TYPE 0x1008
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#define SO_ERROR 0x1007
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#define SO_SNDBUF 0x1001
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#define SO_RCVBUF 0x1002
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#define SO_SNDBUFFORCE 0x100a
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#define SO_RCVBUFFORCE 0x100b
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#define SO_RCVLOWAT 0x1010
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#define SO_SNDLOWAT 0x1011
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#define SO_RCVTIMEO 0x1012
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#define SO_SNDTIMEO 0x1013
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#define SO_ACCEPTCONN 0x1014
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#define SO_PROTOCOL 0x1028
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#define SO_DOMAIN 0x1029
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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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#define SO_BINDTODEVICE 25
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/* Socket filtering */
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#define SO_ATTACH_FILTER 26
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#define SO_DETACH_FILTER 27
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#define SO_GET_FILTER SO_ATTACH_FILTER
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#define SO_PEERNAME 28
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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_PASSSEC 34
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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/* Security levels - as per NRL IPv6 - don't actually do anything */
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#define SO_SECURITY_AUTHENTICATION 19
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#define SO_SECURITY_ENCRYPTION_TRANSPORT 20
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#define SO_SECURITY_ENCRYPTION_NETWORK 21
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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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#define SO_RXQ_OVFL 40
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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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2012-12-17 06:47:09 -07:00
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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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2013-09-24 09:20:52 -06:00
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#define SO_BUSY_POLL 46
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#define SO_MAX_PACING_RATE 47
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2013-06-14 07:33:57 -06:00
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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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2017-04-05 20:00:55 -06:00
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#define SO_COOKIE 57
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2017-05-21 21:13:37 -06:00
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#define SCM_TIMESTAMPING_PKTINFO 58
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net: introduce SO_PEERGROUPS getsockopt
This adds the new getsockopt(2) option SO_PEERGROUPS on SOL_SOCKET to
retrieve the auxiliary groups of the remote peer. It is designed to
naturally extend SO_PEERCRED. That is, the underlying data is from the
same credentials. Regarding its syntax, it is based on SO_PEERSEC. That
is, if the provided buffer is too small, ERANGE is returned and @optlen
is updated. Otherwise, the information is copied, @optlen is set to the
actual size, and 0 is returned.
While SO_PEERCRED (and thus `struct ucred') already returns the primary
group, it lacks the auxiliary group vector. However, nearly all access
controls (including kernel side VFS and SYSVIPC, but also user-space
polkit, DBus, ...) consider the entire set of groups, rather than just
the primary group. But this is currently not possible with pure
SO_PEERCRED. Instead, user-space has to work around this and query the
system database for the auxiliary groups of a UID retrieved via
SO_PEERCRED.
Unfortunately, there is no race-free way to query the auxiliary groups
of the PID/UID retrieved via SO_PEERCRED. Hence, the current user-space
solution is to use getgrouplist(3p), which itself falls back to NSS and
whatever is configured in nsswitch.conf(3). This effectively checks
which groups we *would* assign to the user if it logged in *now*. On
normal systems it is as easy as reading /etc/group, but with NSS it can
resort to quering network databases (eg., LDAP), using IPC or network
communication.
Long story short: Whenever we want to use auxiliary groups for access
checks on IPC, we need further IPC to talk to the user/group databases,
rather than just relying on SO_PEERCRED and the incoming socket. This
is unfortunate, and might even result in dead-locks if the database
query uses the same IPC as the original request.
So far, those recursions / dead-locks have been avoided by using
primitive IPC for all crucial NSS modules. However, we want to avoid
re-inventing the wheel for each NSS module that might be involved in
user/group queries. Hence, we would preferably make DBus (and other IPC
that supports access-management based on groups) work without resorting
to the user/group database. This new SO_PEERGROUPS ioctl would allow us
to make dbus-daemon work without ever calling into NSS.
Cc: Michal Sekletar <msekleta@redhat.com>
Cc: Simon McVittie <simon.mcvittie@collabora.co.uk>
Reviewed-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-21 02:47:15 -06:00
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#define SO_PEERGROUPS 59
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2017-08-03 14:29:40 -06:00
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#define SO_ZEROCOPY 60
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2012-12-17 06:47:09 -07:00
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#endif /* _UAPI_ASM_SOCKET_H */
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