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kfree_skb.yaml
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metrics:
counters:
- name: kfree_skb_total
help: Number of calls into skb:kfree_skb with a per-reason breakdown
labels:
- name: eth_proto
size: 2
decoders:
- name: uint
- name: static_map
static_map:
2048: ipv4
34525: ipv6
- name: ip_proto
size: 2
decoders:
- name: uint
- name: static_map
static_map:
1: icmp
6: tcp
17: udp
- name: port
size: 2
decoders:
- name: uint
- name: reason
size: 2
decoders:
- name: uint
- name: static_map
static_map:
# cat include/arm64/vmlinux.h | grep SKB_DROP_REASON_ | tr -d , | awk '{ printf("%d: %s\n", $3, $1) }'
2: SKB_DROP_REASON_NOT_SPECIFIED
3: SKB_DROP_REASON_NO_SOCKET
4: SKB_DROP_REASON_PKT_TOO_SMALL
5: SKB_DROP_REASON_TCP_CSUM
6: SKB_DROP_REASON_SOCKET_FILTER
7: SKB_DROP_REASON_UDP_CSUM
8: SKB_DROP_REASON_NETFILTER_DROP
9: SKB_DROP_REASON_OTHERHOST
10: SKB_DROP_REASON_IP_CSUM
11: SKB_DROP_REASON_IP_INHDR
12: SKB_DROP_REASON_IP_RPFILTER
13: SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST
14: SKB_DROP_REASON_XFRM_POLICY
15: SKB_DROP_REASON_IP_NOPROTO
16: SKB_DROP_REASON_SOCKET_RCVBUFF
17: SKB_DROP_REASON_PROTO_MEM
18: SKB_DROP_REASON_TCP_MD5NOTFOUND
19: SKB_DROP_REASON_TCP_MD5UNEXPECTED
20: SKB_DROP_REASON_TCP_MD5FAILURE
21: SKB_DROP_REASON_SOCKET_BACKLOG
22: SKB_DROP_REASON_TCP_FLAGS
23: SKB_DROP_REASON_TCP_ZEROWINDOW
24: SKB_DROP_REASON_TCP_OLD_DATA
25: SKB_DROP_REASON_TCP_OVERWINDOW
26: SKB_DROP_REASON_TCP_OFOMERGE
27: SKB_DROP_REASON_TCP_RFC7323_PAWS
28: SKB_DROP_REASON_TCP_INVALID_SEQUENCE
29: SKB_DROP_REASON_TCP_RESET
30: SKB_DROP_REASON_TCP_INVALID_SYN
31: SKB_DROP_REASON_TCP_CLOSE
32: SKB_DROP_REASON_TCP_FASTOPEN
33: SKB_DROP_REASON_TCP_OLD_ACK
34: SKB_DROP_REASON_TCP_TOO_OLD_ACK
35: SKB_DROP_REASON_TCP_ACK_UNSENT_DATA
36: SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE
37: SKB_DROP_REASON_TCP_OFO_DROP
38: SKB_DROP_REASON_IP_OUTNOROUTES
39: SKB_DROP_REASON_BPF_CGROUP_EGRESS
40: SKB_DROP_REASON_IPV6DISABLED
41: SKB_DROP_REASON_NEIGH_CREATEFAIL
42: SKB_DROP_REASON_NEIGH_FAILED
43: SKB_DROP_REASON_NEIGH_QUEUEFULL
44: SKB_DROP_REASON_NEIGH_DEAD
45: SKB_DROP_REASON_TC_EGRESS
46: SKB_DROP_REASON_QDISC_DROP
47: SKB_DROP_REASON_CPU_BACKLOG
48: SKB_DROP_REASON_XDP
49: SKB_DROP_REASON_TC_INGRESS
50: SKB_DROP_REASON_UNHANDLED_PROTO
51: SKB_DROP_REASON_SKB_CSUM
52: SKB_DROP_REASON_SKB_GSO_SEG
53: SKB_DROP_REASON_SKB_UCOPY_FAULT
54: SKB_DROP_REASON_DEV_HDR
55: SKB_DROP_REASON_DEV_READY
56: SKB_DROP_REASON_FULL_RING
57: SKB_DROP_REASON_NOMEM
58: SKB_DROP_REASON_HDR_TRUNC
59: SKB_DROP_REASON_TAP_FILTER
60: SKB_DROP_REASON_TAP_TXFILTER
61: SKB_DROP_REASON_ICMP_CSUM
62: SKB_DROP_REASON_INVALID_PROTO
63: SKB_DROP_REASON_IP_INADDRERRORS
64: SKB_DROP_REASON_IP_INNOROUTES
65: SKB_DROP_REASON_PKT_TOO_BIG
66: SKB_DROP_REASON_DUP_FRAG
67: SKB_DROP_REASON_FRAG_REASM_TIMEOUT
68: SKB_DROP_REASON_FRAG_TOO_FAR
69: SKB_DROP_REASON_TCP_MINTTL
70: SKB_DROP_REASON_IPV6_BAD_EXTHDR
71: SKB_DROP_REASON_IPV6_NDISC_FRAG
72: SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT
73: SKB_DROP_REASON_IPV6_NDISC_BAD_CODE
74: SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS
75: SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST
76: SKB_DROP_REASON_MAX