354 lines
9.7 KiB
C
354 lines
9.7 KiB
C
/*
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* net/tipc/msg.c: TIPC message header routines
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*
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* Copyright (c) 2000-2006, Ericsson AB
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* Copyright (c) 2005, 2010-2011, Wind River Systems
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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 "AS IS"
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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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#include "core.h"
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#include "msg.h"
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u32 tipc_msg_tot_importance(struct tipc_msg *m)
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{
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if (likely(msg_isdata(m))) {
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if (likely(msg_orignode(m) == tipc_own_addr))
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return msg_importance(m);
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return msg_importance(m) + 4;
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}
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if ((msg_user(m) == MSG_FRAGMENTER) &&
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(msg_type(m) == FIRST_FRAGMENT))
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return msg_importance(msg_get_wrapped(m));
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return msg_importance(m);
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}
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void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
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u32 hsize, u32 destnode)
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{
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memset(m, 0, hsize);
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msg_set_version(m);
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msg_set_user(m, user);
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msg_set_hdr_sz(m, hsize);
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msg_set_size(m, hsize);
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msg_set_prevnode(m, tipc_own_addr);
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msg_set_type(m, type);
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msg_set_orignode(m, tipc_own_addr);
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msg_set_destnode(m, destnode);
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}
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/**
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* tipc_msg_build - create message using specified header and data
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*
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* Note: Caller must not hold any locks in case copy_from_user() is interrupted!
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*
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* Returns message data size or errno
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*/
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int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
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u32 num_sect, unsigned int total_len,
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int max_size, int usrmem, struct sk_buff **buf)
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{
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int dsz, sz, hsz, pos, res, cnt;
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dsz = total_len;
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pos = hsz = msg_hdr_sz(hdr);
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sz = hsz + dsz;
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msg_set_size(hdr, sz);
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if (unlikely(sz > max_size)) {
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*buf = NULL;
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return dsz;
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}
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*buf = tipc_buf_acquire(sz);
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if (!(*buf))
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return -ENOMEM;
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skb_copy_to_linear_data(*buf, hdr, hsz);
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for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) {
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if (likely(usrmem))
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res = !copy_from_user((*buf)->data + pos,
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msg_sect[cnt].iov_base,
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msg_sect[cnt].iov_len);
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else
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skb_copy_to_linear_data_offset(*buf, pos,
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msg_sect[cnt].iov_base,
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msg_sect[cnt].iov_len);
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pos += msg_sect[cnt].iov_len;
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}
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if (likely(res))
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return dsz;
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buf_discard(*buf);
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*buf = NULL;
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return -EFAULT;
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}
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#ifdef CONFIG_TIPC_DEBUG
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void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str)
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{
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u32 usr = msg_user(msg);
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tipc_printf(buf, KERN_DEBUG);
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tipc_printf(buf, str);
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switch (usr) {
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case MSG_BUNDLER:
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tipc_printf(buf, "BNDL::");
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tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg));
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break;
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case BCAST_PROTOCOL:
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tipc_printf(buf, "BCASTP::");
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break;
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case MSG_FRAGMENTER:
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tipc_printf(buf, "FRAGM::");
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switch (msg_type(msg)) {
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case FIRST_FRAGMENT:
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tipc_printf(buf, "FIRST:");
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break;
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case FRAGMENT:
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tipc_printf(buf, "BODY:");
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break;
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case LAST_FRAGMENT:
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tipc_printf(buf, "LAST:");
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break;
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default:
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tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
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}
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tipc_printf(buf, "NO(%u/%u):", msg_long_msgno(msg),
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msg_fragm_no(msg));
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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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tipc_printf(buf, "DAT%u:", msg_user(msg));
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if (msg_short(msg)) {
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tipc_printf(buf, "CON:");
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break;
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}
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switch (msg_type(msg)) {
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case TIPC_CONN_MSG:
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tipc_printf(buf, "CON:");
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break;
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case TIPC_MCAST_MSG:
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tipc_printf(buf, "MCST:");
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break;
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case TIPC_NAMED_MSG:
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tipc_printf(buf, "NAM:");
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break;
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case TIPC_DIRECT_MSG:
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tipc_printf(buf, "DIR:");
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break;
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default:
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tipc_printf(buf, "UNKNOWN TYPE %u", msg_type(msg));
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}
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if (msg_reroute_cnt(msg))
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tipc_printf(buf, "REROUTED(%u):",
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msg_reroute_cnt(msg));
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break;
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case NAME_DISTRIBUTOR:
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tipc_printf(buf, "NMD::");
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switch (msg_type(msg)) {
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case PUBLICATION:
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tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */
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break;
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case WITHDRAWAL:
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tipc_printf(buf, "WDRW:");
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break;
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default:
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tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
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}
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if (msg_reroute_cnt(msg))
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tipc_printf(buf, "REROUTED(%u):",
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msg_reroute_cnt(msg));
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break;
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case CONN_MANAGER:
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tipc_printf(buf, "CONN_MNG:");
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switch (msg_type(msg)) {
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case CONN_PROBE:
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tipc_printf(buf, "PROBE:");
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break;
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case CONN_PROBE_REPLY:
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tipc_printf(buf, "PROBE_REPLY:");
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break;
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case CONN_ACK:
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tipc_printf(buf, "CONN_ACK:");
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tipc_printf(buf, "ACK(%u):", msg_msgcnt(msg));
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break;
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default:
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tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
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}
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if (msg_reroute_cnt(msg))
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tipc_printf(buf, "REROUTED(%u):", msg_reroute_cnt(msg));
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break;
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case LINK_PROTOCOL:
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switch (msg_type(msg)) {
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case STATE_MSG:
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tipc_printf(buf, "STATE:");
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tipc_printf(buf, "%s:", msg_probe(msg) ? "PRB" : "");
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tipc_printf(buf, "NXS(%u):", msg_next_sent(msg));
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tipc_printf(buf, "GAP(%u):", msg_seq_gap(msg));
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tipc_printf(buf, "LSTBC(%u):", msg_last_bcast(msg));
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break;
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case RESET_MSG:
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tipc_printf(buf, "RESET:");
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if (msg_size(msg) != msg_hdr_sz(msg))
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tipc_printf(buf, "BEAR:%s:", msg_data(msg));
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break;
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case ACTIVATE_MSG:
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tipc_printf(buf, "ACTIVATE:");
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break;
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default:
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tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
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}
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tipc_printf(buf, "PLANE(%c):", msg_net_plane(msg));
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tipc_printf(buf, "SESS(%u):", msg_session(msg));
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break;
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case CHANGEOVER_PROTOCOL:
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tipc_printf(buf, "TUNL:");
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switch (msg_type(msg)) {
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case DUPLICATE_MSG:
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tipc_printf(buf, "DUPL:");
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break;
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case ORIGINAL_MSG:
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tipc_printf(buf, "ORIG:");
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tipc_printf(buf, "EXP(%u)", msg_msgcnt(msg));
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break;
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default:
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tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
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}
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break;
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case LINK_CONFIG:
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tipc_printf(buf, "CFG:");
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switch (msg_type(msg)) {
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case DSC_REQ_MSG:
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tipc_printf(buf, "DSC_REQ:");
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break;
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case DSC_RESP_MSG:
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tipc_printf(buf, "DSC_RESP:");
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break;
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default:
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tipc_printf(buf, "UNKNOWN TYPE:%x:", msg_type(msg));
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break;
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}
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break;
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default:
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tipc_printf(buf, "UNKNOWN USER:");
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}
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switch (usr) {
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case CONN_MANAGER:
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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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switch (msg_errcode(msg)) {
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case TIPC_OK:
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break;
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case TIPC_ERR_NO_NAME:
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tipc_printf(buf, "NO_NAME:");
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break;
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case TIPC_ERR_NO_PORT:
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tipc_printf(buf, "NO_PORT:");
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break;
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case TIPC_ERR_NO_NODE:
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tipc_printf(buf, "NO_PROC:");
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break;
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case TIPC_ERR_OVERLOAD:
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tipc_printf(buf, "OVERLOAD:");
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break;
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case TIPC_CONN_SHUTDOWN:
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tipc_printf(buf, "SHUTDOWN:");
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break;
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default:
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tipc_printf(buf, "UNKNOWN ERROR(%x):",
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msg_errcode(msg));
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}
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default:
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break;
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}
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tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg));
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tipc_printf(buf, "SZ(%u):", msg_size(msg));
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tipc_printf(buf, "SQNO(%u):", msg_seqno(msg));
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if (msg_non_seq(msg))
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tipc_printf(buf, "NOSEQ:");
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else
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tipc_printf(buf, "ACK(%u):", msg_ack(msg));
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tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg));
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tipc_printf(buf, "PRND(%x)", msg_prevnode(msg));
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if (msg_isdata(msg)) {
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if (msg_named(msg)) {
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tipc_printf(buf, "NTYP(%u):", msg_nametype(msg));
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tipc_printf(buf, "NINST(%u)", msg_nameinst(msg));
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}
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}
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if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) &&
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(usr != MSG_BUNDLER)) {
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if (!msg_short(msg)) {
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tipc_printf(buf, ":ORIG(%x:%u):",
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msg_orignode(msg), msg_origport(msg));
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tipc_printf(buf, ":DEST(%x:%u):",
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msg_destnode(msg), msg_destport(msg));
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} else {
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tipc_printf(buf, ":OPRT(%u):", msg_origport(msg));
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tipc_printf(buf, ":DPRT(%u):", msg_destport(msg));
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}
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}
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if (msg_user(msg) == NAME_DISTRIBUTOR) {
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tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg));
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tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg));
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}
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if (msg_user(msg) == LINK_CONFIG) {
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u32 *raw = (u32 *)msg;
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struct tipc_media_addr *orig = (struct tipc_media_addr *)&raw[5];
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tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg));
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tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg));
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tipc_media_addr_printf(buf, orig);
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}
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if (msg_user(msg) == BCAST_PROTOCOL) {
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tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg));
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tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg));
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}
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tipc_printf(buf, "\n");
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if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg)))
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tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
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if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT))
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tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
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}
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#endif
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