Pavel Tikhomirov 04190bf894 sock: allow reading and changing sk_userlocks with setsockopt ... 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>		2021-08-04 12:52:03 +01:00
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acpi
asm-generic
clocksource
crypto
drm
dt-bindings
keys
kunit
kvm
linux	net: make switchdev_bridge_port_{,unoffload} loosely coupled with the bridge	2021-08-04 12:35:07 +01:00
math-emu
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misc
net	sock: allow reading and changing sk_userlocks with setsockopt	2021-08-04 12:52:03 +01:00
pcmcia
ras
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scsi
soc
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trace
uapi	sock: allow reading and changing sk_userlocks with setsockopt	2021-08-04 12:52:03 +01:00
vdso
video
xen