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1c8284eb MD |
1 | /* |
2 | * ltt/probes/net-extended-trace.c | |
3 | * | |
4 | * Net tracepoint extended probes. | |
5 | * | |
6 | * These probes record many header fields from TCP and UDP messages. Here are | |
7 | * the consequences of this: | |
8 | * 1) it allows analyzing network traffic to provide some pcap-like | |
9 | * functionality within LTTng | |
10 | * 2) it allows offline synchronization of a group of concurrent traces | |
11 | * recorded on different nodes | |
12 | * 3) it increases tracing overhead | |
13 | * | |
14 | * You can leave out these probes or not activate them if you are not | |
15 | * especially interested in the details of network traffic and do not wish to | |
16 | * synchronize distributed traces. | |
17 | * | |
17baffe2 MD |
18 | * (C) Copyright 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> |
19 | * | |
1c8284eb MD |
20 | * Dual LGPL v2.1/GPL v2 license. |
21 | */ | |
22 | ||
23 | #include <linux/in_route.h> | |
24 | #include <linux/ip.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/tcp.h> | |
27 | #include <linux/udp.h> | |
28 | #include <net/route.h> | |
29 | #include <trace/net.h> | |
30 | ||
31 | #include "../ltt-type-serializer.h" | |
32 | ||
33 | void probe_net_dev_xmit_extended(void *_data, struct sk_buff *skb); | |
34 | ||
35 | DEFINE_MARKER_TP(net, dev_xmit_extended, net_dev_xmit, | |
36 | probe_net_dev_xmit_extended, "skb 0x%lX network_protocol #n2u%hu " | |
37 | "transport_protocol #1u%u saddr #n4u%lu daddr #n4u%lu " | |
38 | "tot_len #n2u%hu ihl #1u%u source #n2u%hu dest #n2u%hu seq #n4u%lu " | |
39 | "ack_seq #n4u%lu doff #1u%u ack #1u%u rst #1u%u syn #1u%u fin #1u%u"); | |
40 | ||
41 | notrace void probe_net_dev_xmit_extended(void *_data, struct sk_buff *skb) | |
42 | { | |
43 | struct marker *marker; | |
44 | struct serialize_l214421224411111 data; | |
45 | struct iphdr *iph = ip_hdr(skb); | |
46 | struct tcphdr *th = tcp_hdr(skb); | |
47 | ||
48 | data.f1 = (unsigned long)skb; | |
49 | data.f2 = skb->protocol; | |
50 | ||
51 | if (ntohs(skb->protocol) == ETH_P_IP) { | |
52 | data.f3 = ip_hdr(skb)->protocol; | |
53 | data.f4 = iph->saddr; | |
54 | data.f5 = iph->daddr; | |
55 | data.f6 = iph->tot_len; | |
56 | data.f7 = iph->ihl; | |
57 | ||
58 | if (data.f3 == IPPROTO_TCP) { | |
59 | data.f8 = th->source; | |
60 | data.f9 = th->dest; | |
61 | data.f10 = th->seq; | |
62 | data.f11 = th->ack_seq; | |
63 | data.f12 = th->doff; | |
64 | data.f13 = th->ack; | |
65 | data.f14 = th->rst; | |
66 | data.f15 = th->syn; | |
67 | data.f16 = th->fin; | |
68 | } | |
69 | } | |
70 | ||
71 | marker = &GET_MARKER(net, dev_xmit_extended); | |
72 | ltt_specialized_trace(marker, marker->single.probe_private, | |
73 | &data, serialize_sizeof(data), sizeof(long)); | |
74 | } | |
75 | ||
76 | void probe_tcpv4_rcv_extended(void *_data, struct sk_buff *skb); | |
77 | ||
78 | DEFINE_MARKER_TP(net, tcpv4_rcv_extended, net_tcpv4_rcv, | |
79 | probe_tcpv4_rcv_extended, "skb 0x%lX saddr #n4u%lu daddr #n4u%lu " | |
80 | "tot_len #n2u%hu ihl #1u%u source #n2u%hu dest #n2u%hu seq #n4u%lu " | |
81 | "ack_seq #n4u%lu doff #1u%u ack #1u%u rst #1u%u syn #1u%u fin #1u%u"); | |
82 | ||
83 | notrace void probe_tcpv4_rcv_extended(void *_data, struct sk_buff *skb) | |
84 | { | |
85 | struct marker *marker; | |
86 | struct serialize_l4421224411111 data; | |
87 | struct iphdr *iph = ip_hdr(skb); | |
88 | struct tcphdr *th = tcp_hdr(skb); | |
89 | ||
90 | data.f1 = (unsigned long)skb; | |
91 | data.f2 = iph->saddr; | |
92 | data.f3 = iph->daddr; | |
93 | data.f4 = iph->tot_len; | |
94 | data.f5 = iph->ihl; | |
95 | data.f6 = th->source; | |
96 | data.f7 = th->dest; | |
97 | data.f8 = th->seq; | |
98 | data.f9 = th->ack_seq; | |
99 | data.f10 = th->doff; | |
100 | data.f11 = th->ack; | |
101 | data.f12 = th->rst; | |
102 | data.f13 = th->syn; | |
103 | data.f14 = th->fin; | |
104 | ||
105 | marker = &GET_MARKER(net, tcpv4_rcv_extended); | |
106 | ltt_specialized_trace(marker, marker->single.probe_private, | |
107 | &data, serialize_sizeof(data), sizeof(long)); | |
108 | } | |
109 | ||
110 | void probe_udpv4_rcv_extended(void *_data, struct sk_buff *skb); | |
111 | ||
112 | DEFINE_MARKER_TP(net, udpv4_rcv_extended, net_udpv4_rcv, | |
113 | probe_udpv4_rcv_extended, "skb 0x%lX saddr #n4u%lu daddr #n4u%lu " | |
114 | "unicast #1u%u ulen #n2u%hu source #n2u%hu dest #n2u%hu " | |
115 | "data_start #8u%lx"); | |
116 | ||
117 | notrace void probe_udpv4_rcv_extended(void *_data, struct sk_buff *skb) | |
118 | { | |
119 | struct marker *marker; | |
120 | struct serialize_l4412228 data; | |
121 | struct iphdr *iph = ip_hdr(skb); | |
122 | struct rtable *rt = skb_rtable(skb); | |
123 | struct udphdr *uh = udp_hdr(skb); | |
124 | ||
125 | data.f1 = (unsigned long)skb; | |
126 | data.f2 = iph->saddr; | |
127 | data.f3 = iph->daddr; | |
128 | data.f4 = rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST) ? 0 : 1; | |
129 | data.f5 = uh->len; | |
130 | data.f6 = uh->source; | |
131 | data.f7 = uh->dest; | |
132 | /* UDP header has not been pulled from skb->data, read the first 8 | |
133 | * bytes of UDP data if they are not in a fragment*/ | |
134 | data.f8 = 0; | |
135 | if (skb_headlen(skb) >= sizeof(struct udphdr) + 8) | |
136 | data.f8 = *(unsigned long long *)(skb->data + sizeof(*uh)); | |
137 | else if (skb_headlen(skb) >= sizeof(struct udphdr)) | |
138 | memcpy(&data.f8, skb->data + sizeof(struct udphdr), | |
139 | skb_headlen(skb) - sizeof(struct udphdr)); | |
140 | ||
141 | marker = &GET_MARKER(net, udpv4_rcv_extended); | |
142 | ltt_specialized_trace(marker, marker->single.probe_private, | |
143 | &data, serialize_sizeof(data), sizeof(unsigned long long)); | |
144 | } | |
145 | ||
146 | MODULE_LICENSE("GPL and additional rights"); | |
147 | MODULE_AUTHOR("Benjamin Poirier"); | |
148 | MODULE_DESCRIPTION("Net Tracepoint Extended Probes"); |