1/*
2 * net/tipc/trace.c: TIPC tracepoints code
3 *
4 * Copyright (c) 2018, Ericsson AB
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the names of the copyright holders nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * Alternatively, this software may be distributed under the terms of the
20 * GNU General Public License ("GPL") version 2 as published by the Free
21 * Software Foundation.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ASIS"
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36#define CREATE_TRACE_POINTS
37#include "trace.h"
38
39/*
40 * socket tuples for filtering in socket traces:
41 * (portid, sock type, name type, name lower, name upper)
42 */
43unsigned long sysctl_tipc_sk_filter[5] __read_mostly = {0, };
44
45/**
46 * tipc_skb_dump - dump TIPC skb data
47 * @skb: skb to be dumped
48 * @more: dump more?
49 * - false: dump only tipc msg data
50 * - true: dump kernel-related skb data and tipc cb[] array as well
51 * @buf: returned buffer of dump data in format
52 */
53int tipc_skb_dump(struct sk_buff *skb, bool more, char *buf)
54{
55 int i = 0;
56 size_t sz = (more) ? SKB_LMAX : SKB_LMIN;
57 struct tipc_msg *hdr;
58 struct tipc_skb_cb *skbcb;
59
60 if (!skb) {
61 i += scnprintf(buf, size: sz, fmt: "msg: (null)\n");
62 return i;
63 }
64
65 hdr = buf_msg(skb);
66 skbcb = TIPC_SKB_CB(skb);
67
68 /* tipc msg data section */
69 i += scnprintf(buf, size: sz, fmt: "msg: %u", msg_user(m: hdr));
70 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_type(m: hdr));
71 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_hdr_sz(m: hdr));
72 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_data_sz(m: hdr));
73 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %x", msg_orignode(m: hdr));
74 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %x", msg_destnode(m: hdr));
75 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_seqno(m: hdr));
76 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_ack(m: hdr));
77 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_bcast_ack(m: hdr));
78 switch (msg_user(m: hdr)) {
79 case LINK_PROTOCOL:
80 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %c", msg_net_plane(m: hdr));
81 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_probe(m: hdr));
82 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_peer_stopping(m: hdr));
83 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_session(m: hdr));
84 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_next_sent(m: hdr));
85 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_seq_gap(m: hdr));
86 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_bc_snd_nxt(m: hdr));
87 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_bc_gap(m: hdr));
88 break;
89 case TIPC_LOW_IMPORTANCE:
90 case TIPC_MEDIUM_IMPORTANCE:
91 case TIPC_HIGH_IMPORTANCE:
92 case TIPC_CRITICAL_IMPORTANCE:
93 case CONN_MANAGER:
94 case SOCK_WAKEUP:
95 i += scnprintf(buf: buf + i, size: sz - i, fmt: " | %u", msg_origport(m: hdr));
96 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_destport(m: hdr));
97 switch (msg_type(m: hdr)) {
98 case TIPC_NAMED_MSG:
99 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u",
100 msg_nametype(m: hdr));
101 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u",
102 msg_nameinst(m: hdr));
103 break;
104 case TIPC_MCAST_MSG:
105 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u",
106 msg_nametype(m: hdr));
107 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u",
108 msg_namelower(m: hdr));
109 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u",
110 msg_nameupper(m: hdr));
111 break;
112 default:
113 break;
114 }
115 i += scnprintf(buf: buf + i, size: sz - i, fmt: " | %u",
116 msg_src_droppable(m: hdr));
117 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u",
118 msg_dest_droppable(m: hdr));
119 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_errcode(m: hdr));
120 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", msg_reroute_cnt(m: hdr));
121 break;
122 default:
123 /* need more? */
124 break;
125 }
126
127 i += scnprintf(buf: buf + i, size: sz - i, fmt: "\n");
128 if (!more)
129 return i;
130
131 /* kernel-related skb data section */
132 i += scnprintf(buf: buf + i, size: sz - i, fmt: "skb: %s",
133 (skb->dev) ? skb->dev->name : "n/a");
134 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skb->len);
135 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skb->data_len);
136 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skb->hdr_len);
137 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skb->truesize);
138 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skb_cloned(skb));
139 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %p", skb->sk);
140 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skb_shinfo(skb)->nr_frags);
141 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %llx",
142 ktime_to_ms(kt: skb_get_ktime(skb)));
143 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %llx\n",
144 ktime_to_ms(kt: skb_hwtstamps(skb)->hwtstamp));
145
146 /* tipc skb cb[] data section */
147 i += scnprintf(buf: buf + i, size: sz - i, fmt: "cb[]: %u", skbcb->bytes_read);
148 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skbcb->orig_member);
149 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u",
150 jiffies_to_msecs(j: skbcb->nxt_retr));
151 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skbcb->validated);
152 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u", skbcb->chain_imp);
153 i += scnprintf(buf: buf + i, size: sz - i, fmt: " %u\n", skbcb->ackers);
154
155 return i;
156}
157
158/**
159 * tipc_list_dump - dump TIPC skb list/queue
160 * @list: list of skbs to be dumped
161 * @more: dump more?
162 * - false: dump only the head & tail skbs
163 * - true: dump the first & last 5 skbs
164 * @buf: returned buffer of dump data in format
165 */
166int tipc_list_dump(struct sk_buff_head *list, bool more, char *buf)
167{
168 int i = 0;
169 size_t sz = (more) ? LIST_LMAX : LIST_LMIN;
170 u32 count, len;
171 struct sk_buff *hskb, *tskb, *skb, *tmp;
172
173 if (!list) {
174 i += scnprintf(buf, size: sz, fmt: "(null)\n");
175 return i;
176 }
177
178 len = skb_queue_len(list_: list);
179 i += scnprintf(buf, size: sz, fmt: "len = %d\n", len);
180
181 if (!len)
182 return i;
183
184 if (!more) {
185 hskb = skb_peek(list_: list);
186 i += scnprintf(buf: buf + i, size: sz - i, fmt: " head ");
187 i += tipc_skb_dump(skb: hskb, more: false, buf: buf + i);
188 if (len > 1) {
189 tskb = skb_peek_tail(list_: list);
190 i += scnprintf(buf: buf + i, size: sz - i, fmt: " tail ");
191 i += tipc_skb_dump(skb: tskb, more: false, buf: buf + i);
192 }
193 } else {
194 count = 0;
195 skb_queue_walk_safe(list, skb, tmp) {
196 count++;
197 if (count == 6)
198 i += scnprintf(buf: buf + i, size: sz - i, fmt: " .\n .\n");
199 if (count > 5 && count <= len - 5)
200 continue;
201 i += scnprintf(buf: buf + i, size: sz - i, fmt: " #%d ", count);
202 i += tipc_skb_dump(skb, more: false, buf: buf + i);
203 }
204 }
205 return i;
206}
207

source code of linux/net/tipc/trace.c