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epsocket: support /proc/net/snmp

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Netstack has its own stats, we use this to fill /proc/net/snmp.

Note that some metrics are not recorded in Netstack, which will be shown
as 0 in the proc file.

Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Change-Id: Ie0089184507d16f49bc0057b4b0482094417ebe1
This commit is contained in:
Jianfeng Tan
2019-10-15 16:38:41 +00:00
parent aee2c93366
commit d277bfba27
4 changed files with 121 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files
pkg/sentry/socket/netstack/stack.go
+92 -1
View File
@@ -144,7 +144,98 @@ func (s *Stack) SetTCPSACKEnabled(enabled bool) error {
// Statistics implements inet.Stack.Statistics.
func (s *Stack) Statistics(stat interface{}, arg string) error {
return syserr.ErrEndpointOperation.ToError()
switch stats := stat.(type) {
case *inet.StatSNMPIP:
ip := Metrics.IP
*stats = inet.StatSNMPIP{
0, // TODO(gvisor.dev/issue/969): Support Ip/Forwarding.
0, // TODO(gvisor.dev/issue/969): Support Ip/DefaultTTL.
ip.PacketsReceived.Value(), // InReceives.
0, // TODO(gvisor.dev/issue/969): Support Ip/InHdrErrors.
ip.InvalidAddressesReceived.Value(), // InAddrErrors.
0, // TODO(gvisor.dev/issue/969): Support Ip/ForwDatagrams.
0, // TODO(gvisor.dev/issue/969): Support Ip/InUnknownProtos.
0, // TODO(gvisor.dev/issue/969): Support Ip/InDiscards.
ip.PacketsDelivered.Value(), // InDelivers.
ip.PacketsSent.Value(), // OutRequests.
ip.OutgoingPacketErrors.Value(), // OutDiscards.
0, // TODO(gvisor.dev/issue/969): Support Ip/OutNoRoutes.
0, // TODO(gvisor.dev/issue/969): Support Ip/ReasmTimeout.
0, // TODO(gvisor.dev/issue/969): Support Ip/ReasmReqds.
0, // TODO(gvisor.dev/issue/969): Support Ip/ReasmOKs.
0, // TODO(gvisor.dev/issue/969): Support Ip/ReasmFails.
0, // TODO(gvisor.dev/issue/969): Support Ip/FragOKs.
0, // TODO(gvisor.dev/issue/969): Support Ip/FragFails.
0, // TODO(gvisor.dev/issue/969): Support Ip/FragCreates.
}
case *inet.StatSNMPICMP:
in := Metrics.ICMP.V4PacketsReceived.ICMPv4PacketStats
out := Metrics.ICMP.V4PacketsSent.ICMPv4PacketStats
*stats = inet.StatSNMPICMP{
0, // TODO(gvisor.dev/issue/969): Support Icmp/InMsgs.
Metrics.ICMP.V4PacketsSent.Dropped.Value(), // InErrors.
0, // TODO(gvisor.dev/issue/969): Support Icmp/InCsumErrors.
in.DstUnreachable.Value(), // InDestUnreachs.
in.TimeExceeded.Value(), // InTimeExcds.
in.ParamProblem.Value(), // InParmProbs.
in.SrcQuench.Value(), // InSrcQuenchs.
in.Redirect.Value(), // InRedirects.
in.Echo.Value(), // InEchos.
in.EchoReply.Value(), // InEchoReps.
in.Timestamp.Value(), // InTimestamps.
in.TimestampReply.Value(), // InTimestampReps.
in.InfoRequest.Value(), // InAddrMasks.
in.InfoReply.Value(), // InAddrMaskReps.
0, // TODO(gvisor.dev/issue/969): Support Icmp/OutMsgs.
Metrics.ICMP.V4PacketsReceived.Invalid.Value(), // OutErrors.
out.DstUnreachable.Value(), // OutDestUnreachs.
out.TimeExceeded.Value(), // OutTimeExcds.
out.ParamProblem.Value(), // OutParmProbs.
out.SrcQuench.Value(), // OutSrcQuenchs.
out.Redirect.Value(), // OutRedirects.
out.Echo.Value(), // OutEchos.
out.EchoReply.Value(), // OutEchoReps.
out.Timestamp.Value(), // OutTimestamps.
out.TimestampReply.Value(), // OutTimestampReps.
out.InfoRequest.Value(), // OutAddrMasks.
out.InfoReply.Value(), // OutAddrMaskReps.
}
case *inet.StatSNMPTCP:
tcp := Metrics.TCP
// RFC 2012 (updates 1213): SNMPv2-MIB-TCP.
*stats = inet.StatSNMPTCP{
1, // RtoAlgorithm.
200, // RtoMin.
120000, // RtoMax.
(1<<64 - 1), // MaxConn.
tcp.ActiveConnectionOpenings.Value(), // ActiveOpens.
tcp.PassiveConnectionOpenings.Value(), // PassiveOpens.
tcp.FailedConnectionAttempts.Value(), // AttemptFails.
tcp.EstablishedResets.Value(), // EstabResets.
tcp.CurrentEstablished.Value(), // CurrEstab.
tcp.ValidSegmentsReceived.Value(), // InSegs.
tcp.SegmentsSent.Value(), // OutSegs.
tcp.Retransmits.Value(), // RetransSegs.
tcp.InvalidSegmentsReceived.Value(), // InErrs.
tcp.ResetsSent.Value(), // OutRsts.
tcp.ChecksumErrors.Value(), // InCsumErrors.
}
case *inet.StatSNMPUDP:
udp := Metrics.UDP
*stats = inet.StatSNMPUDP{
udp.PacketsReceived.Value(), // InDatagrams.
udp.UnknownPortErrors.Value(), // NoPorts.
0, // TODO(gvisor.dev/issue/969): Support Udp/InErrors.
udp.PacketsSent.Value(), // OutDatagrams.
udp.ReceiveBufferErrors.Value(), // RcvbufErrors.
0, // TODO(gvisor.dev/issue/969): Support Udp/SndbufErrors.
0, // TODO(gvisor.dev/issue/969): Support Udp/InCsumErrors.
0, // TODO(gvisor.dev/issue/969): Support Udp/IgnoredMulti.
}
default:
return syserr.ErrEndpointOperation.ToError()
}
return nil
}
// RouteTable implements inet.Stack.RouteTable.