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 */ 43 unsigned 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 */ 53 int 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, sz, "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, 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)) { 79 case LINK_PROTOCOL: 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)); 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 + i, sz - i, " | %u", msg_origport(hdr)); 96 i += scnprintf(buf + i, sz - i, " %u", msg_destport(hdr)); 97 switch (msg_type(hdr)) { 98 case TIPC_NAMED_MSG: 99 i += scnprintf(buf + i, sz - i, " %u", 100 msg_nametype(hdr)); 101 i += scnprintf(buf + i, sz - i, " %u", 102 msg_nameinst(hdr)); 103 break; 104 case TIPC_MCAST_MSG: 105 i += scnprintf(buf + i, sz - i, " %u", 106 msg_nametype(hdr)); 107 i += scnprintf(buf + i, sz - i, " %u", 108 msg_namelower(hdr)); 109 i += scnprintf(buf + i, sz - i, " %u", 110 msg_nameupper(hdr)); 111 break; 112 default: 113 break; 114 } 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)); 121 break; 122 default: 123 /* need more? */ 124 break; 125 } 126 127 i += scnprintf(buf + i, sz - i, "\n"); 128 if (!more) 129 return i; 130 131 /* 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)); 145 146 /* 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); 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 */ 166 int 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, sz, "(null)\n"); 175 return i; 176 } 177 178 len = skb_queue_len(list); 179 i += scnprintf(buf, sz, "len = %d\n", len); 180 181 if (!len) 182 return i; 183 184 if (!more) { 185 hskb = skb_peek(list); 186 i += scnprintf(buf + i, sz - i, " head "); 187 i += tipc_skb_dump(hskb, false, buf + i); 188 if (len > 1) { 189 tskb = skb_peek_tail(list); 190 i += scnprintf(buf + i, sz - i, " tail "); 191 i += tipc_skb_dump(tskb, false, 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 + i, sz - i, " .\n .\n"); 199 if (count > 5 && count <= len - 5) 200 continue; 201 i += scnprintf(buf + i, sz - i, " #%d ", count); 202 i += tipc_skb_dump(skb, false, buf + i); 203 } 204 } 205 return i; 206 } 207