[1273732.110294] [ffff889be8fbcd00][consume_skb ][cpu:40 ][ens5 ][pid:0 ][swapper/40 ] ICMP: 169.254.128.15 -> 172.27.0.6 ping request, seq: 56464 可以看到,每个报文的地址、所在 CPU、网口和进程信息都被打印了出来。 1.4 NAT 跟踪 在对报文进行跟踪时,一旦报文被跟踪起来(命中过滤条件),那...
[consume_skb ][cpu:40 ][ens5 ][pid:0 ][swapper/40 ] ICMP: 169.254.128.15 -> 172.27.0.6 ping request, seq: 56464 [1273732.110291] [ffff889be8fbcd00][packet_rcv ][cpu:40 ][ens5 ][pid:0 ][swapper/40 ] ICMP: 169.254.128.15 -> 172.27.0.6 ping request, seq: 56464 [...
[consume_skb ][cpu:40 ][ens5 ][pid:0 ][swapper/40 ] ICMP: 169.254.128.15 -> 172.27.0.6 ping request, seq: 56464 [1273732.110291] [e8fbcd00][packet_rcv ][cpu:40 ][ens5 ][pid:0 ][swapper/40 ] ICMP: 169.254.128.15 -> 172.27.0.6 ping request, seq: 56464 [1273732.110294] [e8...
SEC("tp/net/netif_receive_skb") int net_netif_receive_skb(struct trace_event_raw_consume_skb *args) { struct sk_buff *skb = (struct sk_buff *)BPF_CORE_READ(args, skbaddr); return trace_skb(skb, TP_NETIF_RECEIVE_SKB); } So the questions are, does each network interfa...
Android筆記-Linux Kernel Ftrace (Function Trace)解析 hlchou@mail2000.com.tw by loda 在軟體開發時,通常都會面臨到系統效能調教的需求,我們希望知道哪些區塊的程式碼或函式被執行的次數頻繁,或是佔據較高的處理器時間,以便藉此優化程
[consume_skb ] ICMP: 192.168.255.10 -> 10.123.119.98 ping request, seq: 0 *packet is freed (normally)*--- ANALYSIS RESULT ---[1] WARNING happens in nf_nat_manip_pkt(netfilter): NAT happens (packet address will change) 如果当前报文存在 ERROR,那么工具会给出一定的诊断修复建议,并当前诊断...
[consume_skb ] ICMP: 169.254.128.15 ->172.27.0.6 ping request, seq: 48220 [1272349.614722] [packet_rcv ] ICMP: 169.254.128.15 ->172.27.0.6 ping request, seq: 48220 [1272349.614725] [consume_skb ] ICMP: 169.254.128.15 ->172.27.0.6 ping request, seq: 48220***ffff889be8fbde00***[1272349...
0 463697.332042: [dev_queue_xmit ]: ICMP: 9.135.224.89 ->10.123.119.98, ping request , seq: 0 463697.332046: [dev_hard_start_xmit ]: ICMP: 9.135.224.89 ->10.123.119.98, ping request , seq: 0 463697.332060: [consume_skb ]: ICMP: 9.135.224.89 ->10.123.119.98, ping request , seq: 0...
$ sudo ./nettrace -p icmp --trace-stack consume_skb,icmp_rcv begin trace...***2cafd200,2cafdc00***[2846531.810609] [nf_hook_slow ] ICMP: 127.0.0.1 ->127.0.0.1 ping reply, seq: 3, id: 51956*ipv4inchain: OUTPUT*[2846531.810612] [ip_output ] ICMP: 127.0.0.1 ->127.0.0.1 ...