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NETOBSERV-1135: add ovs subsystem drop causes
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OVS drop support just merged upstream
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/net/openvswitch/drop.h

Signed-off-by: msherif1234 <mmahmoud@redhat.com>
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@msherif1234
msherif1234 committed Aug 16, 2023
1 parent 5912edf commit 5c70c00
Showing 1 changed file with 192 additions and 149 deletions.
341 changes: 192 additions & 149 deletions pkg/pipeline/decode/decode_protobuf.go
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,13 @@ import (
"google.golang.org/protobuf/proto"
)

const (
skbDropReasonSubsystemShift = 16
skbDropReasonValueMask = 0xFFFF
skbDropReasonSubSysCore = 0
skbDropReasonSubSysOpenVSwitch = 3
)

// Protobuf decodes protobuf flow records definitions, as forwarded by
// ingest.NetObservAgent, into a Generic Map that follows the same naming conventions
// as the IPFIX flows from ingest.IngestCollector
Expand Down Expand Up @@ -153,155 +160,191 @@ func tcpStateToStr(state uint32) string {
// pktDropCauseToStr is based on kernel drop cause definition
// https://elixir.bootlin.com/linux/latest/source/include/net/dropreason.h#L88
func pktDropCauseToStr(dropCause uint32) string {
switch dropCause {
case 2:
return "SKB_DROP_REASON_NOT_SPECIFIED"
case 3:
return "SKB_DROP_REASON_NO_SOCKET"
case 4:
return "SKB_DROP_REASON_PKT_TOO_SMALL"
case 5:
return "SKB_DROP_REASON_TCP_CSUM"
case 6:
return "SKB_DROP_REASON_SOCKET_FILTER"
case 7:
return "SKB_DROP_REASON_UDP_CSUM"
case 8:
return "SKB_DROP_REASON_NETFILTER_DROP"
case 9:
return "SKB_DROP_REASON_OTHERHOST"
case 10:
return "SKB_DROP_REASON_IP_CSUM"
case 11:
return "SKB_DROP_REASON_IP_INHDR"
case 12:
return "SKB_DROP_REASON_IP_RPFILTER"
case 13:
return "SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST"
case 14:
return "SKB_DROP_REASON_XFRM_POLICY"
case 15:
return "SKB_DROP_REASON_IP_NOPROTO"
case 16:
return "SKB_DROP_REASON_SOCKET_RCVBUFF"
case 17:
return "SKB_DROP_REASON_PROTO_MEM"
case 18:
return "SKB_DROP_REASON_TCP_MD5NOTFOUND"
case 19:
return "SKB_DROP_REASON_TCP_MD5UNEXPECTED"
case 20:
return "SKB_DROP_REASON_TCP_MD5FAILURE"
case 21:
return "SKB_DROP_REASON_SOCKET_BACKLOG"
case 22:
return "SKB_DROP_REASON_TCP_FLAGS"
case 23:
return "SKB_DROP_REASON_TCP_ZEROWINDOW"
case 24:
return "SKB_DROP_REASON_TCP_OLD_DATA"
case 25:
return "SKB_DROP_REASON_TCP_OVERWINDOW"
case 26:
return "SKB_DROP_REASON_TCP_OFOMERGE"
case 27:
return "SKB_DROP_REASON_TCP_RFC7323_PAWS"
case 28:
return "SKB_DROP_REASON_TCP_INVALID_SEQUENCE"
case 29:
return "SKB_DROP_REASON_TCP_RESET"
case 30:
return "SKB_DROP_REASON_TCP_INVALID_SYN"
case 31:
return "SKB_DROP_REASON_TCP_CLOSE"
case 32:
return "SKB_DROP_REASON_TCP_FASTOPEN"
case 33:
return "SKB_DROP_REASON_TCP_OLD_ACK"
case 34:
return "SKB_DROP_REASON_TCP_TOO_OLD_ACK"
case 35:
return "SKB_DROP_REASON_TCP_ACK_UNSENT_DATA"
case 36:
return "SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE"
case 37:
return "SKB_DROP_REASON_TCP_OFO_DROP"
case 38:
return "SKB_DROP_REASON_IP_OUTNOROUTES"
case 39:
return "SKB_DROP_REASON_BPF_CGROUP_EGRESS"
case 40:
return "SKB_DROP_REASON_IPV6DISABLED"
case 41:
return "SKB_DROP_REASON_NEIGH_CREATEFAIL"
case 42:
return "SKB_DROP_REASON_NEIGH_FAILED"
case 43:
return "SKB_DROP_REASON_NEIGH_QUEUEFULL"
case 44:
return "SKB_DROP_REASON_NEIGH_DEAD"
case 45:
return "SKB_DROP_REASON_TC_EGRESS"
case 46:
return "SKB_DROP_REASON_QDISC_DROP"
case 47:
return "SKB_DROP_REASON_CPU_BACKLOG"
case 48:
return "SKB_DROP_REASON_XDP"
case 49:
return "SKB_DROP_REASON_TC_INGRESS"
case 50:
return "SKB_DROP_REASON_UNHANDLED_PROTO"
case 51:
return "SKB_DROP_REASON_SKB_CSUM"
case 52:
return "SKB_DROP_REASON_SKB_GSO_SEG"
case 53:
return "SKB_DROP_REASON_SKB_UCOPY_FAULT"
case 54:
return "SKB_DROP_REASON_DEV_HDR"
case 55:
return "SKB_DROP_REASON_DEV_READY"
case 56:
return "SKB_DROP_REASON_FULL_RING"
case 57:
return "SKB_DROP_REASON_NOMEM"
case 58:
return "SKB_DROP_REASON_HDR_TRUNC"
case 59:
return "SKB_DROP_REASON_TAP_FILTER"
case 60:
return "SKB_DROP_REASON_TAP_TXFILTER"
case 61:
return "SKB_DROP_REASON_ICMP_CSUM"
case 62:
return "SKB_DROP_REASON_INVALID_PROTO"
case 63:
return "SKB_DROP_REASON_IP_INADDRERRORS"
case 64:
return "SKB_DROP_REASON_IP_INNOROUTES"
case 65:
return "SKB_DROP_REASON_PKT_TOO_BIG"
case 66:
return "SKB_DROP_REASON_DUP_FRAG"
case 67:
return "SKB_DROP_REASON_FRAG_REASM_TIMEOUT"
case 68:
return "SKB_DROP_REASON_FRAG_TOO_FAR"
case 69:
return "SKB_DROP_REASON_TCP_MINTTL"
case 70:
return "SKB_DROP_REASON_IPV6_BAD_EXTHDR"
case 71:
return "SKB_DROP_REASON_IPV6_NDISC_FRAG"
case 72:
return "SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT"
case 73:
return "SKB_DROP_REASON_IPV6_NDISC_BAD_CODE"
case 74:
return "SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS"
case 75:
return "SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST"
dropReasonSubSys := dropCause >> skbDropReasonSubsystemShift
switch dropReasonSubSys {
case skbDropReasonSubSysCore:
{
switch dropCause & skbDropReasonValueMask {
case 2:
return "SKB_DROP_REASON_NOT_SPECIFIED"
case 3:
return "SKB_DROP_REASON_NO_SOCKET"
case 4:
return "SKB_DROP_REASON_PKT_TOO_SMALL"
case 5:
return "SKB_DROP_REASON_TCP_CSUM"
case 6:
return "SKB_DROP_REASON_SOCKET_FILTER"
case 7:
return "SKB_DROP_REASON_UDP_CSUM"
case 8:
return "SKB_DROP_REASON_NETFILTER_DROP"
case 9:
return "SKB_DROP_REASON_OTHERHOST"
case 10:
return "SKB_DROP_REASON_IP_CSUM"
case 11:
return "SKB_DROP_REASON_IP_INHDR"
case 12:
return "SKB_DROP_REASON_IP_RPFILTER"
case 13:
return "SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST"
case 14:
return "SKB_DROP_REASON_XFRM_POLICY"
case 15:
return "SKB_DROP_REASON_IP_NOPROTO"
case 16:
return "SKB_DROP_REASON_SOCKET_RCVBUFF"
case 17:
return "SKB_DROP_REASON_PROTO_MEM"
case 18:
return "SKB_DROP_REASON_TCP_MD5NOTFOUND"
case 19:
return "SKB_DROP_REASON_TCP_MD5UNEXPECTED"
case 20:
return "SKB_DROP_REASON_TCP_MD5FAILURE"
case 21:
return "SKB_DROP_REASON_SOCKET_BACKLOG"
case 22:
return "SKB_DROP_REASON_TCP_FLAGS"
case 23:
return "SKB_DROP_REASON_TCP_ZEROWINDOW"
case 24:
return "SKB_DROP_REASON_TCP_OLD_DATA"
case 25:
return "SKB_DROP_REASON_TCP_OVERWINDOW"
case 26:
return "SKB_DROP_REASON_TCP_OFOMERGE"
case 27:
return "SKB_DROP_REASON_TCP_RFC7323_PAWS"
case 28:
return "SKB_DROP_REASON_TCP_INVALID_SEQUENCE"
case 29:
return "SKB_DROP_REASON_TCP_RESET"
case 30:
return "SKB_DROP_REASON_TCP_INVALID_SYN"
case 31:
return "SKB_DROP_REASON_TCP_CLOSE"
case 32:
return "SKB_DROP_REASON_TCP_FASTOPEN"
case 33:
return "SKB_DROP_REASON_TCP_OLD_ACK"
case 34:
return "SKB_DROP_REASON_TCP_TOO_OLD_ACK"
case 35:
return "SKB_DROP_REASON_TCP_ACK_UNSENT_DATA"
case 36:
return "SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE"
case 37:
return "SKB_DROP_REASON_TCP_OFO_DROP"
case 38:
return "SKB_DROP_REASON_IP_OUTNOROUTES"
case 39:
return "SKB_DROP_REASON_BPF_CGROUP_EGRESS"
case 40:
return "SKB_DROP_REASON_IPV6DISABLED"
case 41:
return "SKB_DROP_REASON_NEIGH_CREATEFAIL"
case 42:
return "SKB_DROP_REASON_NEIGH_FAILED"
case 43:
return "SKB_DROP_REASON_NEIGH_QUEUEFULL"
case 44:
return "SKB_DROP_REASON_NEIGH_DEAD"
case 45:
return "SKB_DROP_REASON_TC_EGRESS"
case 46:
return "SKB_DROP_REASON_QDISC_DROP"
case 47:
return "SKB_DROP_REASON_CPU_BACKLOG"
case 48:
return "SKB_DROP_REASON_XDP"
case 49:
return "SKB_DROP_REASON_TC_INGRESS"
case 50:
return "SKB_DROP_REASON_UNHANDLED_PROTO"
case 51:
return "SKB_DROP_REASON_SKB_CSUM"
case 52:
return "SKB_DROP_REASON_SKB_GSO_SEG"
case 53:
return "SKB_DROP_REASON_SKB_UCOPY_FAULT"
case 54:
return "SKB_DROP_REASON_DEV_HDR"
case 55:
return "SKB_DROP_REASON_DEV_READY"
case 56:
return "SKB_DROP_REASON_FULL_RING"
case 57:
return "SKB_DROP_REASON_NOMEM"
case 58:
return "SKB_DROP_REASON_HDR_TRUNC"
case 59:
return "SKB_DROP_REASON_TAP_FILTER"
case 60:
return "SKB_DROP_REASON_TAP_TXFILTER"
case 61:
return "SKB_DROP_REASON_ICMP_CSUM"
case 62:
return "SKB_DROP_REASON_INVALID_PROTO"
case 63:
return "SKB_DROP_REASON_IP_INADDRERRORS"
case 64:
return "SKB_DROP_REASON_IP_INNOROUTES"
case 65:
return "SKB_DROP_REASON_PKT_TOO_BIG"
case 66:
return "SKB_DROP_REASON_DUP_FRAG"
case 67:
return "SKB_DROP_REASON_FRAG_REASM_TIMEOUT"
case 68:
return "SKB_DROP_REASON_FRAG_TOO_FAR"
case 69:
return "SKB_DROP_REASON_TCP_MINTTL"
case 70:
return "SKB_DROP_REASON_IPV6_BAD_EXTHDR"
case 71:
return "SKB_DROP_REASON_IPV6_NDISC_FRAG"
case 72:
return "SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT"
case 73:
return "SKB_DROP_REASON_IPV6_NDISC_BAD_CODE"
case 74:
return "SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS"
case 75:
return "SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST"

}
}
// ovs drop causes
// https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/net/openvswitch/drop.h
case skbDropReasonSubSysOpenVSwitch:
{
switch dropCause & skbDropReasonValueMask {
case 0:
return "OVS_DROP_LAST_ACTION"
case 1:
return "OVS_DROP_ACTION_ERROR"
case 2:
return "OVS_DROP_EXPLICIT"
case 3:
return "OVS_DROP_EXPLICIT_WITH_ERROR"
case 4:
return "OVS_DROP_METER"
case 5:
return "OVS_DROP_RECURSION_LIMIT"
case 6:
return "OVS_DROP_DEFERRED_LIMIT"
case 7:
return "OVS_DROP_FRAG_L2_TOO_LONG"
case 8:
return "OVS_DROP_FRAG_INVALID_PROTO"
case 9:
return "OVS_DROP_CONNTRACK"
case 10:
return "OVS_DROP_IP_TTL"
}
}
}
return "SKB_DROP_UNKNOWN_CAUSE"
}
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