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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 | * | |
18 | * Dual LGPL v2.1/GPL v2 license. | |
19 | */ | |
20 | ||
21 | #include <linux/in_route.h> | |
22 | #include <linux/ip.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/tcp.h> | |
25 | #include <linux/udp.h> | |
26 | #include <net/route.h> | |
27 | #include <trace/net.h> | |
28 | ||
29 | #include "../ltt-type-serializer.h" | |
30 | ||
31 | void probe_net_dev_xmit_extended(void *_data, struct sk_buff *skb); | |
32 | ||
33 | DEFINE_MARKER_TP(net, dev_xmit_extended, net_dev_xmit, | |
34 | probe_net_dev_xmit_extended, "skb 0x%lX network_protocol #n2u%hu " | |
35 | "transport_protocol #1u%u saddr #n4u%lu daddr #n4u%lu " | |
36 | "tot_len #n2u%hu ihl #1u%u source #n2u%hu dest #n2u%hu seq #n4u%lu " | |
37 | "ack_seq #n4u%lu doff #1u%u ack #1u%u rst #1u%u syn #1u%u fin #1u%u"); | |
38 | ||
39 | notrace void probe_net_dev_xmit_extended(void *_data, struct sk_buff *skb) | |
40 | { | |
41 | struct marker *marker; | |
42 | struct serialize_l214421224411111 data; | |
43 | struct iphdr *iph = ip_hdr(skb); | |
44 | struct tcphdr *th = tcp_hdr(skb); | |
8fad657c JD |
45 | struct udphdr *uh = udp_hdr(skb); |
46 | ||
47 | memset(&data, 0, sizeof(struct serialize_l214421224411111)); | |
1c8284eb MD |
48 | |
49 | data.f1 = (unsigned long)skb; | |
50 | data.f2 = skb->protocol; | |
51 | ||
52 | if (ntohs(skb->protocol) == ETH_P_IP) { | |
53 | data.f3 = ip_hdr(skb)->protocol; | |
54 | data.f4 = iph->saddr; | |
55 | data.f5 = iph->daddr; | |
56 | data.f6 = iph->tot_len; | |
57 | data.f7 = iph->ihl; | |
58 | ||
59 | if (data.f3 == IPPROTO_TCP) { | |
60 | data.f8 = th->source; | |
61 | data.f9 = th->dest; | |
62 | data.f10 = th->seq; | |
63 | data.f11 = th->ack_seq; | |
64 | data.f12 = th->doff; | |
65 | data.f13 = th->ack; | |
66 | data.f14 = th->rst; | |
67 | data.f15 = th->syn; | |
68 | data.f16 = th->fin; | |
8fad657c JD |
69 | } else if (data.f3 == IPPROTO_UDP) { |
70 | data.f8 = uh->source; | |
71 | data.f9 = uh->dest; | |
1c8284eb MD |
72 | } |
73 | } | |
74 | ||
75 | marker = &GET_MARKER(net, dev_xmit_extended); | |
76 | ltt_specialized_trace(marker, marker->single.probe_private, | |
77 | &data, serialize_sizeof(data), sizeof(long)); | |
78 | } | |
79 | ||
80 | void probe_tcpv4_rcv_extended(void *_data, struct sk_buff *skb); | |
81 | ||
82 | DEFINE_MARKER_TP(net, tcpv4_rcv_extended, net_tcpv4_rcv, | |
83 | probe_tcpv4_rcv_extended, "skb 0x%lX saddr #n4u%lu daddr #n4u%lu " | |
84 | "tot_len #n2u%hu ihl #1u%u source #n2u%hu dest #n2u%hu seq #n4u%lu " | |
85 | "ack_seq #n4u%lu doff #1u%u ack #1u%u rst #1u%u syn #1u%u fin #1u%u"); | |
86 | ||
87 | notrace void probe_tcpv4_rcv_extended(void *_data, struct sk_buff *skb) | |
88 | { | |
89 | struct marker *marker; | |
90 | struct serialize_l4421224411111 data; | |
91 | struct iphdr *iph = ip_hdr(skb); | |
92 | struct tcphdr *th = tcp_hdr(skb); | |
93 | ||
94 | data.f1 = (unsigned long)skb; | |
95 | data.f2 = iph->saddr; | |
96 | data.f3 = iph->daddr; | |
97 | data.f4 = iph->tot_len; | |
98 | data.f5 = iph->ihl; | |
99 | data.f6 = th->source; | |
100 | data.f7 = th->dest; | |
101 | data.f8 = th->seq; | |
102 | data.f9 = th->ack_seq; | |
103 | data.f10 = th->doff; | |
104 | data.f11 = th->ack; | |
105 | data.f12 = th->rst; | |
106 | data.f13 = th->syn; | |
107 | data.f14 = th->fin; | |
108 | ||
109 | marker = &GET_MARKER(net, tcpv4_rcv_extended); | |
110 | ltt_specialized_trace(marker, marker->single.probe_private, | |
111 | &data, serialize_sizeof(data), sizeof(long)); | |
112 | } | |
113 | ||
114 | void probe_udpv4_rcv_extended(void *_data, struct sk_buff *skb); | |
115 | ||
116 | DEFINE_MARKER_TP(net, udpv4_rcv_extended, net_udpv4_rcv, | |
117 | probe_udpv4_rcv_extended, "skb 0x%lX saddr #n4u%lu daddr #n4u%lu " | |
118 | "unicast #1u%u ulen #n2u%hu source #n2u%hu dest #n2u%hu " | |
119 | "data_start #8u%lx"); | |
120 | ||
121 | notrace void probe_udpv4_rcv_extended(void *_data, struct sk_buff *skb) | |
122 | { | |
123 | struct marker *marker; | |
124 | struct serialize_l4412228 data; | |
125 | struct iphdr *iph = ip_hdr(skb); | |
126 | struct rtable *rt = skb_rtable(skb); | |
127 | struct udphdr *uh = udp_hdr(skb); | |
128 | ||
129 | data.f1 = (unsigned long)skb; | |
130 | data.f2 = iph->saddr; | |
131 | data.f3 = iph->daddr; | |
132 | data.f4 = rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST) ? 0 : 1; | |
133 | data.f5 = uh->len; | |
134 | data.f6 = uh->source; | |
135 | data.f7 = uh->dest; | |
136 | /* UDP header has not been pulled from skb->data, read the first 8 | |
137 | * bytes of UDP data if they are not in a fragment*/ | |
138 | data.f8 = 0; | |
139 | if (skb_headlen(skb) >= sizeof(struct udphdr) + 8) | |
140 | data.f8 = *(unsigned long long *)(skb->data + sizeof(*uh)); | |
141 | else if (skb_headlen(skb) >= sizeof(struct udphdr)) | |
142 | memcpy(&data.f8, skb->data + sizeof(struct udphdr), | |
143 | skb_headlen(skb) - sizeof(struct udphdr)); | |
144 | ||
145 | marker = &GET_MARKER(net, udpv4_rcv_extended); | |
146 | ltt_specialized_trace(marker, marker->single.probe_private, | |
147 | &data, serialize_sizeof(data), sizeof(unsigned long long)); | |
148 | } | |
149 | ||
150 | MODULE_LICENSE("GPL and additional rights"); | |
151 | MODULE_AUTHOR("Benjamin Poirier"); | |
152 | MODULE_DESCRIPTION("Net Tracepoint Extended Probes"); |