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https://github.com/checkpoint-restore/criu.git
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e69be16db7
When one sets socket buffer sizes with setsockopt(SO_{SND,RCV}BUF*),
kernel sets coresponding SOCK_SNDBUF_LOCK or SOCK_RCVBUF_LOCK flags on
struct sock. It means that such a socket with explicitly changed buffer
size can not be auto-adjusted by kernel (e.g. if there is free memory
kernel can auto-increase default socket buffers to improve perfomance).
(see tcp_fixup_rcvbuf() and tcp_sndbuf_expand())
CRIU is always changing buf sizes on restore, that means that all
sockets receive lock flags on struct sock and become non-auto-adjusted
after migration. In some cases it can decrease perfomance of network
connections quite a lot.
So let's c/r socket buf locks (SO_BUF_LOCKS), so that sockets for which
auto-adjustment is available does not lose it.
Reviewed-by: Alexander Mikhalitsyn <alexander.mikhalitsyn@virtuozzo.com>
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
43 lines
1 KiB
Protocol Buffer
43 lines
1 KiB
Protocol Buffer
// SPDX-License-Identifier: MIT
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syntax = "proto2";
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message sk_opts_entry {
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required uint32 so_sndbuf = 1;
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required uint32 so_rcvbuf = 2;
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required uint64 so_snd_tmo_sec = 3;
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required uint64 so_snd_tmo_usec = 4;
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required uint64 so_rcv_tmo_sec = 5;
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required uint64 so_rcv_tmo_usec = 6;
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optional bool reuseaddr = 7;
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optional uint32 so_priority = 8;
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optional uint32 so_rcvlowat = 9;
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optional uint32 so_mark = 10;
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optional bool so_passcred = 11;
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optional bool so_passsec = 12;
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optional bool so_dontroute = 13;
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optional bool so_no_check = 14;
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optional string so_bound_dev = 15;
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repeated fixed64 so_filter = 16;
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optional bool so_reuseport = 17;
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optional bool so_broadcast = 18;
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optional bool so_keepalive = 19;
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optional uint32 tcp_keepcnt = 20;
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optional uint32 tcp_keepidle = 21;
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optional uint32 tcp_keepintvl = 22;
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optional uint32 so_oobinline = 23;
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optional uint32 so_linger = 24;
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optional uint32 so_buf_lock = 25;
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}
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enum sk_shutdown {
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NONE = 0;
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READ = 1;
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WRITE = 2;
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BOTH = 3;
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}
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