mirror of https://gitee.com/openkylin/linux.git
207 lines
7.0 KiB
C
207 lines
7.0 KiB
C
/*
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* net/tipc/trace.c: TIPC tracepoints code
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*
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* Copyright (c) 2018, Ericsson AB
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ASIS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define CREATE_TRACE_POINTS
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#include "trace.h"
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/*
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* socket tuples for filtering in socket traces:
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* (portid, sock type, name type, name lower, name upper)
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*/
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unsigned long sysctl_tipc_sk_filter[5] __read_mostly = {0, };
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/**
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* tipc_skb_dump - dump TIPC skb data
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* @skb: skb to be dumped
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* @more: dump more?
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* - false: dump only tipc msg data
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* - true: dump kernel-related skb data and tipc cb[] array as well
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* @buf: returned buffer of dump data in format
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*/
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int tipc_skb_dump(struct sk_buff *skb, bool more, char *buf)
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{
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int i = 0;
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size_t sz = (more) ? SKB_LMAX : SKB_LMIN;
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struct tipc_msg *hdr;
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struct tipc_skb_cb *skbcb;
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if (!skb) {
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i += scnprintf(buf, sz, "msg: (null)\n");
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return i;
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}
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hdr = buf_msg(skb);
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skbcb = TIPC_SKB_CB(skb);
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/* tipc msg data section */
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i += scnprintf(buf, sz, "msg: %u", msg_user(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_type(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_hdr_sz(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_data_sz(hdr));
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i += scnprintf(buf + i, sz - i, " %x", msg_orignode(hdr));
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i += scnprintf(buf + i, sz - i, " %x", msg_destnode(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_seqno(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_ack(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_bcast_ack(hdr));
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switch (msg_user(hdr)) {
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case LINK_PROTOCOL:
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i += scnprintf(buf + i, sz - i, " %c", msg_net_plane(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_probe(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_peer_stopping(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_session(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_next_sent(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_seq_gap(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_bc_snd_nxt(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_bc_gap(hdr));
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break;
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case TIPC_LOW_IMPORTANCE:
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case TIPC_MEDIUM_IMPORTANCE:
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case TIPC_HIGH_IMPORTANCE:
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case TIPC_CRITICAL_IMPORTANCE:
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case CONN_MANAGER:
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case SOCK_WAKEUP:
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i += scnprintf(buf + i, sz - i, " | %u", msg_origport(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_destport(hdr));
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switch (msg_type(hdr)) {
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case TIPC_NAMED_MSG:
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i += scnprintf(buf + i, sz - i, " %u",
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msg_nametype(hdr));
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i += scnprintf(buf + i, sz - i, " %u",
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msg_nameinst(hdr));
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break;
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case TIPC_MCAST_MSG:
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i += scnprintf(buf + i, sz - i, " %u",
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msg_nametype(hdr));
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i += scnprintf(buf + i, sz - i, " %u",
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msg_namelower(hdr));
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i += scnprintf(buf + i, sz - i, " %u",
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msg_nameupper(hdr));
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break;
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default:
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break;
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}
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i += scnprintf(buf + i, sz - i, " | %u",
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msg_src_droppable(hdr));
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i += scnprintf(buf + i, sz - i, " %u",
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msg_dest_droppable(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_errcode(hdr));
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i += scnprintf(buf + i, sz - i, " %u", msg_reroute_cnt(hdr));
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break;
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default:
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/* need more? */
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break;
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}
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i += scnprintf(buf + i, sz - i, "\n");
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if (!more)
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return i;
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/* kernel-related skb data section */
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i += scnprintf(buf + i, sz - i, "skb: %s",
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(skb->dev) ? skb->dev->name : "n/a");
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i += scnprintf(buf + i, sz - i, " %u", skb->len);
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i += scnprintf(buf + i, sz - i, " %u", skb->data_len);
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i += scnprintf(buf + i, sz - i, " %u", skb->hdr_len);
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i += scnprintf(buf + i, sz - i, " %u", skb->truesize);
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i += scnprintf(buf + i, sz - i, " %u", skb_cloned(skb));
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i += scnprintf(buf + i, sz - i, " %p", skb->sk);
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i += scnprintf(buf + i, sz - i, " %u", skb_shinfo(skb)->nr_frags);
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i += scnprintf(buf + i, sz - i, " %llx",
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ktime_to_ms(skb_get_ktime(skb)));
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i += scnprintf(buf + i, sz - i, " %llx\n",
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ktime_to_ms(skb_hwtstamps(skb)->hwtstamp));
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/* tipc skb cb[] data section */
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i += scnprintf(buf + i, sz - i, "cb[]: %u", skbcb->bytes_read);
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i += scnprintf(buf + i, sz - i, " %u", skbcb->orig_member);
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i += scnprintf(buf + i, sz - i, " %u",
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jiffies_to_msecs(skbcb->nxt_retr));
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i += scnprintf(buf + i, sz - i, " %u", skbcb->validated);
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i += scnprintf(buf + i, sz - i, " %u", skbcb->chain_imp);
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i += scnprintf(buf + i, sz - i, " %u\n", skbcb->ackers);
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return i;
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}
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/**
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* tipc_list_dump - dump TIPC skb list/queue
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* @list: list of skbs to be dumped
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* @more: dump more?
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* - false: dump only the head & tail skbs
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* - true: dump the first & last 5 skbs
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* @buf: returned buffer of dump data in format
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*/
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int tipc_list_dump(struct sk_buff_head *list, bool more, char *buf)
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{
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int i = 0;
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size_t sz = (more) ? LIST_LMAX : LIST_LMIN;
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u32 count, len;
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struct sk_buff *hskb, *tskb, *skb, *tmp;
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if (!list) {
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i += scnprintf(buf, sz, "(null)\n");
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return i;
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}
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len = skb_queue_len(list);
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i += scnprintf(buf, sz, "len = %d\n", len);
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if (!len)
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return i;
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if (!more) {
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hskb = skb_peek(list);
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i += scnprintf(buf + i, sz - i, " head ");
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i += tipc_skb_dump(hskb, false, buf + i);
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if (len > 1) {
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tskb = skb_peek_tail(list);
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i += scnprintf(buf + i, sz - i, " tail ");
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i += tipc_skb_dump(tskb, false, buf + i);
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}
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} else {
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count = 0;
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skb_queue_walk_safe(list, skb, tmp) {
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count++;
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if (count == 6)
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i += scnprintf(buf + i, sz - i, " .\n .\n");
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if (count > 5 && count <= len - 5)
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continue;
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i += scnprintf(buf + i, sz - i, " #%d ", count);
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i += tipc_skb_dump(skb, false, buf + i);
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}
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}
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return i;
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}
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