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04190bf894
SOCK_SNDBUF_LOCK and SOCK_RCVBUF_LOCK flags disable automatic socket
buffers adjustment done by kernel (see tcp_fixup_rcvbuf() and
tcp_sndbuf_expand()). If we've just created a new socket this adjustment
is enabled on it, but if one changes the socket buffer size by
setsockopt(SO_{SND,RCV}BUF*) it becomes disabled.
CRIU needs to call setsockopt(SO_{SND,RCV}BUF*) on each socket on
restore as it first needs to increase buffer sizes for packet queues
restore and second it needs to restore back original buffer sizes. So
after CRIU restore all sockets become non-auto-adjustable, which can
decrease network performance of restored applications significantly.
CRIU need to be able to restore sockets with enabled/disabled adjustment
to the same state it was before dump, so let's add special setsockopt
for it.
Let's also export SOCK_SNDBUF_LOCK and SOCK_RCVBUF_LOCK flags to uAPI so
that using these interface one can reenable automatic socket buffer
adjustment on their sockets.
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef __ASM_GENERIC_SOCKET_H
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#define __ASM_GENERIC_SOCKET_H
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#include <linux/posix_types.h>
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#include <asm/sockios.h>
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/* For setsockopt(2) */
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#define SOL_SOCKET 1
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#define SO_DEBUG 1
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#define SO_REUSEADDR 2
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#define SO_TYPE 3
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#define SO_ERROR 4
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#define SO_DONTROUTE 5
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#define SO_BROADCAST 6
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#define SO_SNDBUF 7
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#define SO_RCVBUF 8
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#define SO_SNDBUFFORCE 32
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#define SO_RCVBUFFORCE 33
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#define SO_KEEPALIVE 9
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#define SO_OOBINLINE 10
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#define SO_NO_CHECK 11
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#define SO_PRIORITY 12
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#define SO_LINGER 13
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#define SO_BSDCOMPAT 14
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#define SO_REUSEPORT 15
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#ifndef SO_PASSCRED /* powerpc only differs in these */
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#define SO_PASSCRED 16
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#define SO_PEERCRED 17
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#define SO_RCVLOWAT 18
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#define SO_SNDLOWAT 19
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#define SO_RCVTIMEO_OLD 20
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#define SO_SNDTIMEO_OLD 21
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#endif
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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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#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_ACCEPTCONN 30
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#define SO_PEERSEC 31
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#define SO_PASSSEC 34
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#define SO_MARK 36
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#define SO_PROTOCOL 38
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#define SO_DOMAIN 39
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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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#define SO_LOCK_FILTER 44
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#define SO_SELECT_ERR_QUEUE 45
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#define SO_BUSY_POLL 46
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#define SO_MAX_PACING_RATE 47
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#define SO_BPF_EXTENSIONS 48
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#define SO_INCOMING_CPU 49
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#define SO_ATTACH_BPF 50
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#define SO_DETACH_BPF SO_DETACH_FILTER
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#define SO_ATTACH_REUSEPORT_CBPF 51
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#define SO_ATTACH_REUSEPORT_EBPF 52
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#define SO_CNX_ADVICE 53
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#define SCM_TIMESTAMPING_OPT_STATS 54
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#define SO_MEMINFO 55
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#define SO_INCOMING_NAPI_ID 56
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#define SO_COOKIE 57
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#define SCM_TIMESTAMPING_PKTINFO 58
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#define SO_PEERGROUPS 59
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#define SO_ZEROCOPY 60
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#define SO_TXTIME 61
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#define SCM_TXTIME SO_TXTIME
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#define SO_BINDTOIFINDEX 62
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#define SO_TIMESTAMP_OLD 29
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#define SO_TIMESTAMPNS_OLD 35
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#define SO_TIMESTAMPING_OLD 37
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#define SO_TIMESTAMP_NEW 63
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#define SO_TIMESTAMPNS_NEW 64
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#define SO_TIMESTAMPING_NEW 65
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#define SO_RCVTIMEO_NEW 66
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#define SO_SNDTIMEO_NEW 67
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#define SO_DETACH_REUSEPORT_BPF 68
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#define SO_PREFER_BUSY_POLL 69
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#define SO_BUSY_POLL_BUDGET 70
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#define SO_NETNS_COOKIE 71
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#define SO_BUF_LOCK 72
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#if !defined(__KERNEL__)
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#if __BITS_PER_LONG == 64 || (defined(__x86_64__) && defined(__ILP32__))
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/* on 64-bit and x32, avoid the ?: operator */
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#define SO_TIMESTAMP SO_TIMESTAMP_OLD
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#define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD
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#define SO_TIMESTAMPING SO_TIMESTAMPING_OLD
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#define SO_RCVTIMEO SO_RCVTIMEO_OLD
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#define SO_SNDTIMEO SO_SNDTIMEO_OLD
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#else
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#define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
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#define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
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#define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW)
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#define SO_RCVTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_RCVTIMEO_OLD : SO_RCVTIMEO_NEW)
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#define SO_SNDTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_SNDTIMEO_OLD : SO_SNDTIMEO_NEW)
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#endif
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#define SCM_TIMESTAMP SO_TIMESTAMP
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SCM_TIMESTAMPING SO_TIMESTAMPING
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#endif
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#endif /* __ASM_GENERIC_SOCKET_H */
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