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| author | Nayana Bidari <nybidari@google.com> | 2020-08-05 20:45:02 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-08-05 20:50:06 -0700 |
| commit | 35312a95c4c8626365b4ece5ffb0bcab44b4bede (patch) | |
| tree | ecf3ac9def6dcf0e366acfcd2e694a3965edb4dd /pkg/sentry/inet/inet.go | |
| parent | 7ed4b2b5a6928b3a4a88d0117a764dd4795be61a (diff) | |
Add loss recovery option for TCP.
/proc/sys/net/ipv4/tcp_recovery is used to enable RACK loss
recovery in TCP.
PiperOrigin-RevId: 325157807
Diffstat (limited to 'pkg/sentry/inet/inet.go')
| -rw-r--r-- | pkg/sentry/inet/inet.go | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/pkg/sentry/inet/inet.go b/pkg/sentry/inet/inet.go index 2916a0644..c0b4831d1 100644 --- a/pkg/sentry/inet/inet.go +++ b/pkg/sentry/inet/inet.go @@ -56,6 +56,12 @@ type Stack interface { // settings. SetTCPSACKEnabled(enabled bool) error + // TCPRecovery returns the TCP loss detection algorithm. + TCPRecovery() (TCPLossRecovery, error) + + // SetTCPRecovery attempts to change TCP loss detection algorithm. + SetTCPRecovery(recovery TCPLossRecovery) error + // Statistics reports stack statistics. Statistics(stat interface{}, arg string) error @@ -189,3 +195,14 @@ type StatSNMPUDP [8]uint64 // StatSNMPUDPLite describes UdpLite line of /proc/net/snmp. type StatSNMPUDPLite [8]uint64 + +// TCPLossRecovery indicates TCP loss detection and recovery methods to use. +type TCPLossRecovery int32 + +// Loss recovery constants from include/net/tcp.h which are used to set +// /proc/sys/net/ipv4/tcp_recovery. +const ( + TCP_RACK_LOSS_DETECTION TCPLossRecovery = 1 << iota + TCP_RACK_STATIC_REO_WND + TCP_RACK_NO_DUPTHRESH +) |