2 * net/tipc/trace.c: TIPC tracepoints code
4 * Copyright (c) 2018, Ericsson AB
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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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.
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.
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
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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.
36 #define CREATE_TRACE_POINTS
40 * socket tuples for filtering in socket traces:
41 * (portid, sock type, name type, name lower, name upper)
43 unsigned long sysctl_tipc_sk_filter[5] __read_mostly = {0, };
46 * tipc_skb_dump - dump TIPC skb data
47 * @skb: skb to be dumped
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
53 int tipc_skb_dump(struct sk_buff *skb, bool more, char *buf)
56 size_t sz = (more) ? SKB_LMAX : SKB_LMIN;
58 struct tipc_skb_cb *skbcb;
61 i += scnprintf(buf, sz, "msg: (null)\n");
66 skbcb = TIPC_SKB_CB(skb);
68 /* tipc msg data section */
69 i += scnprintf(buf, sz, "msg: %u", msg_user(hdr));
70 i += scnprintf(buf + i, sz - i, " %u", msg_type(hdr));
71 i += scnprintf(buf + i, sz - i, " %u", msg_hdr_sz(hdr));
72 i += scnprintf(buf + i, sz - i, " %u", msg_data_sz(hdr));
73 i += scnprintf(buf + i, sz - i, " %x", msg_orignode(hdr));
74 i += scnprintf(buf + i, sz - i, " %x", msg_destnode(hdr));
75 i += scnprintf(buf + i, sz - i, " %u", msg_seqno(hdr));
76 i += scnprintf(buf + i, sz - i, " %u", msg_ack(hdr));
77 i += scnprintf(buf + i, sz - i, " %u", msg_bcast_ack(hdr));
78 switch (msg_user(hdr)) {
80 i += scnprintf(buf + i, sz - i, " %c", msg_net_plane(hdr));
81 i += scnprintf(buf + i, sz - i, " %u", msg_probe(hdr));
82 i += scnprintf(buf + i, sz - i, " %u", msg_peer_stopping(hdr));
83 i += scnprintf(buf + i, sz - i, " %u", msg_session(hdr));
84 i += scnprintf(buf + i, sz - i, " %u", msg_next_sent(hdr));
85 i += scnprintf(buf + i, sz - i, " %u", msg_seq_gap(hdr));
86 i += scnprintf(buf + i, sz - i, " %u", msg_bc_snd_nxt(hdr));
87 i += scnprintf(buf + i, sz - i, " %u", msg_bc_gap(hdr));
89 case TIPC_LOW_IMPORTANCE:
90 case TIPC_MEDIUM_IMPORTANCE:
91 case TIPC_HIGH_IMPORTANCE:
92 case TIPC_CRITICAL_IMPORTANCE:
95 i += scnprintf(buf + i, sz - i, " | %u", msg_origport(hdr));
96 i += scnprintf(buf + i, sz - i, " %u", msg_destport(hdr));
97 switch (msg_type(hdr)) {
99 i += scnprintf(buf + i, sz - i, " %u",
101 i += scnprintf(buf + i, sz - i, " %u",
105 i += scnprintf(buf + i, sz - i, " %u",
107 i += scnprintf(buf + i, sz - i, " %u",
109 i += scnprintf(buf + i, sz - i, " %u",
115 i += scnprintf(buf + i, sz - i, " | %u",
116 msg_src_droppable(hdr));
117 i += scnprintf(buf + i, sz - i, " %u",
118 msg_dest_droppable(hdr));
119 i += scnprintf(buf + i, sz - i, " %u", msg_errcode(hdr));
120 i += scnprintf(buf + i, sz - i, " %u", msg_reroute_cnt(hdr));
127 i += scnprintf(buf + i, sz - i, "\n");
131 /* kernel-related skb data section */
132 i += scnprintf(buf + i, sz - i, "skb: %s",
133 (skb->dev) ? skb->dev->name : "n/a");
134 i += scnprintf(buf + i, sz - i, " %u", skb->len);
135 i += scnprintf(buf + i, sz - i, " %u", skb->data_len);
136 i += scnprintf(buf + i, sz - i, " %u", skb->hdr_len);
137 i += scnprintf(buf + i, sz - i, " %u", skb->truesize);
138 i += scnprintf(buf + i, sz - i, " %u", skb_cloned(skb));
139 i += scnprintf(buf + i, sz - i, " %p", skb->sk);
140 i += scnprintf(buf + i, sz - i, " %u", skb_shinfo(skb)->nr_frags);
141 i += scnprintf(buf + i, sz - i, " %llx",
142 ktime_to_ms(skb_get_ktime(skb)));
143 i += scnprintf(buf + i, sz - i, " %llx\n",
144 ktime_to_ms(skb_hwtstamps(skb)->hwtstamp));
146 /* tipc skb cb[] data section */
147 i += scnprintf(buf + i, sz - i, "cb[]: %u", skbcb->bytes_read);
148 i += scnprintf(buf + i, sz - i, " %u", skbcb->orig_member);
149 i += scnprintf(buf + i, sz - i, " %u",
150 jiffies_to_msecs(skbcb->nxt_retr));
151 i += scnprintf(buf + i, sz - i, " %u", skbcb->validated);
152 i += scnprintf(buf + i, sz - i, " %u", skbcb->chain_imp);
153 i += scnprintf(buf + i, sz - i, " %u\n", skbcb->ackers);
159 * tipc_list_dump - dump TIPC skb list/queue
160 * @list: list of skbs to be dumped
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
166 int tipc_list_dump(struct sk_buff_head *list, bool more, char *buf)
169 size_t sz = (more) ? LIST_LMAX : LIST_LMIN;
171 struct sk_buff *hskb, *tskb, *skb, *tmp;
174 i += scnprintf(buf, sz, "(null)\n");
178 len = skb_queue_len(list);
179 i += scnprintf(buf, sz, "len = %d\n", len);
185 hskb = skb_peek(list);
186 i += scnprintf(buf + i, sz - i, " head ");
187 i += tipc_skb_dump(hskb, false, buf + i);
189 tskb = skb_peek_tail(list);
190 i += scnprintf(buf + i, sz - i, " tail ");
191 i += tipc_skb_dump(tskb, false, buf + i);
195 skb_queue_walk_safe(list, skb, tmp) {
198 i += scnprintf(buf + i, sz - i, " .\n .\n");
199 if (count > 5 && count <= len - 5)
201 i += scnprintf(buf + i, sz - i, " #%d ", count);
202 i += tipc_skb_dump(skb, false, buf + i);