Release 4.11 net/tipc/msg.h

Directory: net/tipc
/*
 * net/tipc/msg.h: Include file for TIPC message header routines
 *
 * Copyright (c) 2000-2007, 2014-2015 Ericsson AB
 * Copyright (c) 2005-2008, 2010-2011, Wind River Systems
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _TIPC_MSG_H

#define _TIPC_MSG_H

#include <linux/tipc.h>
#include "core.h"

/*
 * Constants and routines used to read and write TIPC payload message headers
 *
 * Note: Some items are also used with TIPC internal message headers
 */

#define TIPC_VERSION              2
struct plist;

/*
 * Payload message users are defined in TIPC's public API:
 * - TIPC_LOW_IMPORTANCE
 * - TIPC_MEDIUM_IMPORTANCE
 * - TIPC_HIGH_IMPORTANCE
 * - TIPC_CRITICAL_IMPORTANCE
 */

#define TIPC_SYSTEM_IMPORTANCE	4


/*
 * Payload message types
 */

#define TIPC_CONN_MSG		0

#define TIPC_MCAST_MSG		1

#define TIPC_NAMED_MSG		2

#define TIPC_DIRECT_MSG		3

/*
 * Internal message users
 */

#define  BCAST_PROTOCOL       5

#define  MSG_BUNDLER          6

#define  LINK_PROTOCOL        7

#define  CONN_MANAGER         8

#define  TUNNEL_PROTOCOL      10

#define  NAME_DISTRIBUTOR     11

#define  MSG_FRAGMENTER       12

#define  LINK_CONFIG          13

#define  SOCK_WAKEUP          14       
/* pseudo user */

/*
 * Message header sizes
 */

#define SHORT_H_SIZE              24	
/* In-cluster basic payload message */

#define BASIC_H_SIZE              32	
/* Basic payload message */

#define NAMED_H_SIZE              40	
/* Named payload message */

#define MCAST_H_SIZE              44	
/* Multicast payload message */

#define INT_H_SIZE                40	
/* Internal messages */

#define MIN_H_SIZE                24	
/* Smallest legal TIPC header size */

#define MAX_H_SIZE                60	
/* Largest possible TIPC header size */


#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)


#define TIPC_MEDIA_INFO_OFFSET	5


struct tipc_skb_cb {
	
u32 bytes_read;
	
struct sk_buff *tail;
	
bool validated;
	
u16 chain_imp;
	
u16 ackers;
};


#define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))


struct tipc_msg {
	
__be32 hdr[15];
};



static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
{
	return (struct tipc_msg *)skb->data;
}

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static inline u32 msg_word(struct tipc_msg *m, u32 pos)
{
	return ntohl(m->hdr[pos]);
}

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static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
{
	m->hdr[w] = htonl(val);
}

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static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
{
	return (msg_word(m, w) >> pos) & mask;
}

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static inline void msg_set_bits(struct tipc_msg *m, u32 w,
				u32 pos, u32 mask, u32 val)
{
	val = (val & mask) << pos;
	mask = mask << pos;
	m->hdr[w] &= ~htonl(mask);
	m->hdr[w] |= htonl(val);
}

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static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
{
	u32 temp = msg->hdr[a];

	msg->hdr[a] = msg->hdr[b];
	msg->hdr[b] = temp;
}

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/*
 * Word 0
 */


static inline u32 msg_version(struct tipc_msg *m)
{
	return msg_bits(m, 0, 29, 7);
}

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static inline void msg_set_version(struct tipc_msg *m)
{
	msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
}

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static inline u32 msg_user(struct tipc_msg *m)
{
	return msg_bits(m, 0, 25, 0xf);
}

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static inline u32 msg_isdata(struct tipc_msg *m)
{
	return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
}

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static inline void msg_set_user(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 0, 25, 0xf, n);
}

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static inline u32 msg_hdr_sz(struct tipc_msg *m)
{
	return msg_bits(m, 0, 21, 0xf) << 2;
}

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static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 0, 21, 0xf, n>>2);
}

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static inline u32 msg_size(struct tipc_msg *m)
{
	return msg_bits(m, 0, 0, 0x1ffff);
}

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static inline u32 msg_data_sz(struct tipc_msg *m)
{
	return msg_size(m) - msg_hdr_sz(m);
}

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static inline int msg_non_seq(struct tipc_msg *m)
{
	return msg_bits(m, 0, 20, 1);
}

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static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 0, 20, 1, n);
}

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static inline int msg_dest_droppable(struct tipc_msg *m)
{
	return msg_bits(m, 0, 19, 1);
}

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static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
{
	msg_set_bits(m, 0, 19, 1, d);
}

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static inline int msg_src_droppable(struct tipc_msg *m)
{
	return msg_bits(m, 0, 18, 1);
}

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static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
{
	msg_set_bits(m, 0, 18, 1, d);
}

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static inline void msg_set_size(struct tipc_msg *m, u32 sz)
{
	m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
}

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static inline unchar *msg_data(struct tipc_msg *m)
{
	return ((unchar *)m) + msg_hdr_sz(m);
}

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static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
{
	return (struct tipc_msg *)msg_data(m);
}

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/*
 * Word 1
 */


static inline u32 msg_type(struct tipc_msg *m)
{
	return msg_bits(m, 1, 29, 0x7);
}

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static inline void msg_set_type(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 1, 29, 0x7, n);
}

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static inline u32 msg_named(struct tipc_msg *m)
{
	return msg_type(m) == TIPC_NAMED_MSG;
}

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static inline u32 msg_mcast(struct tipc_msg *m)
{
	return msg_type(m) == TIPC_MCAST_MSG;
}

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static inline u32 msg_connected(struct tipc_msg *m)
{
	return msg_type(m) == TIPC_CONN_MSG;
}

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static inline u32 msg_errcode(struct tipc_msg *m)
{
	return msg_bits(m, 1, 25, 0xf);
}

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static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
{
	msg_set_bits(m, 1, 25, 0xf, err);
}

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static inline u32 msg_reroute_cnt(struct tipc_msg *m)
{
	return msg_bits(m, 1, 21, 0xf);
}

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static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
{
	msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
}

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static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
{
	msg_set_bits(m, 1, 21, 0xf, 0);
}

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static inline u32 msg_lookup_scope(struct tipc_msg *m)
{
	return msg_bits(m, 1, 19, 0x3);
}

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static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 1, 19, 0x3, n);
}

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static inline u16 msg_bcast_ack(struct tipc_msg *m)
{
	return msg_bits(m, 1, 0, 0xffff);
}

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static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
{
	msg_set_bits(m, 1, 0, 0xffff, n);
}


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/*
 * Word 2
 */


static inline u16 msg_ack(struct tipc_msg *m)
{
	return msg_bits(m, 2, 16, 0xffff);
}

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static inline void msg_set_ack(struct tipc_msg *m, u16 n)
{
	msg_set_bits(m, 2, 16, 0xffff, n);
}

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static inline u16 msg_seqno(struct tipc_msg *m)
{
	return msg_bits(m, 2, 0, 0xffff);
}

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static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
{
	msg_set_bits(m, 2, 0, 0xffff, n);
}

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/*
 * Words 3-10
 */


static inline u32 msg_importance(struct tipc_msg *m)
{
	int usr = msg_user(m);

	if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
		return usr;
	if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
		return msg_bits(m, 9, 0, 0x7);
	return TIPC_SYSTEM_IMPORTANCE;
}

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static inline void msg_set_importance(struct tipc_msg *m, u32 i)
{
	int usr = msg_user(m);

	if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
		msg_set_bits(m, 9, 0, 0x7, i);
	else if (i < TIPC_SYSTEM_IMPORTANCE)
		msg_set_user(m, i);
	else
		pr_warn("Trying to set illegal importance in message\n");
}

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static inline u32 msg_prevnode(struct tipc_msg *m)
{
	return msg_word(m, 3);
}

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static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
{
	msg_set_word(m, 3, a);
}

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static inline u32 msg_origport(struct tipc_msg *m)
{
	if (msg_user(m) == MSG_FRAGMENTER)
		m = msg_get_wrapped(m);
	return msg_word(m, 4);
}

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Total 36 100.00% 2 100.00%



static inline void msg_set_origport(struct tipc_msg *m, u32 p)
{
	msg_set_word(m, 4, p);
}

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static inline u32 msg_destport(struct tipc_msg *m)
{
	return msg_word(m, 5);
}

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static inline void msg_set_destport(struct tipc_msg *m, u32 p)
{
	msg_set_word(m, 5, p);
}

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static inline u32 msg_mc_netid(struct tipc_msg *m)
{
	return msg_word(m, 5);
}

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static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
{
	msg_set_word(m, 5, p);
}

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static inline int msg_short(struct tipc_msg *m)
{
	return msg_hdr_sz(m) == SHORT_H_SIZE;
}

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static inline u32 msg_orignode(struct tipc_msg *m)
{
	if (likely(msg_short(m)))
		return msg_prevnode(m);
	return msg_word(m, 6);
}

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static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
{
	msg_set_word(m, 6, a);
}

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static inline u32 msg_destnode(struct tipc_msg *m)
{
	return msg_word(m, 7);
}

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static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
{
	msg_set_word(m, 7, a);
}

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static inline u32 msg_nametype(struct tipc_msg *m)
{
	return msg_word(m, 8);
}

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static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
{
	msg_set_word(m, 8, n);
}

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static inline u32 msg_nameinst(struct tipc_msg *m)
{
	return msg_word(m, 9);
}

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static inline u32 msg_namelower(struct tipc_msg *m)
{
	return msg_nameinst(m);
}

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static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
{
	msg_set_word(m, 9, n);
}

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static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
{
	msg_set_namelower(m, n);
}

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static inline u32 msg_nameupper(struct tipc_msg *m)
{
	return msg_word(m, 10);
}

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static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
{
	msg_set_word(m, 10, n);
}

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/*
 * Constants and routines used to read and write TIPC internal message headers
 */

/*
 *  Connection management protocol message types
 */

#define CONN_PROBE        0

#define CONN_PROBE_REPLY  1

#define CONN_ACK          2

/*
 * Name distributor message types
 */

#define PUBLICATION       0

#define WITHDRAWAL        1

/*
 * Segmentation message types
 */

#define FIRST_FRAGMENT		0

#define FRAGMENT		1

#define LAST_FRAGMENT		2

/*
 * Link management protocol message types
 */

#define STATE_MSG		0

#define RESET_MSG		1

#define ACTIVATE_MSG		2

/*
 * Changeover tunnel message types
 */

#define SYNCH_MSG		0

#define FAILOVER_MSG		1

/*
 * Config protocol message types
 */

#define DSC_REQ_MSG		0

#define DSC_RESP_MSG		1

/*
 * Word 1
 */


static inline u32 msg_seq_gap(struct tipc_msg *m)
{
	return msg_bits(m, 1, 16, 0x1fff);
}

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static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 1, 16, 0x1fff, n);
}

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static inline u32 msg_node_sig(struct tipc_msg *m)
{
	return msg_bits(m, 1, 0, 0xffff);
}

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static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 1, 0, 0xffff, n);
}

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Allan Stephens 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



static inline u32 msg_node_capabilities(struct tipc_msg *m)
{
	return msg_bits(m, 1, 15, 0x1fff);
}

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Jon Paul Maloy 24 100.00% 1 100.00%
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static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 1, 15, 0x1fff, n);
}

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Jon Paul Maloy 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%

/*
 * Word 2
 */


static inline u32 msg_dest_domain(struct tipc_msg *m)
{
	return msg_word(m, 2);
}

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static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
{
	msg_set_word(m, 2, n);
}

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Per Liden 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline u32 msg_bcgap_after(struct tipc_msg *m)
{
	return msg_bits(m, 2, 16, 0xffff);
}

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Total 24 100.00% 1 100.00%



static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 2, 16, 0xffff, n);
}

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Total 28 100.00% 1 100.00%



static inline u32 msg_bcgap_to(struct tipc_msg *m)
{
	return msg_bits(m, 2, 0, 0xffff);
}

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static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 2, 0, 0xffff, n);
}


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Total 28 100.00% 1 100.00%

/*
 * Word 4
 */


static inline u32 msg_last_bcast(struct tipc_msg *m)
{
	return msg_bits(m, 4, 16, 0xffff);
}

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Total 24 100.00% 1 100.00%



static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
{
	return msg_last_bcast(m) + 1;
}

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Jon Paul Maloy 20 100.00% 1 100.00%
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static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 4, 16, 0xffff, n);
}

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Total 28 100.00% 1 100.00%



static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 4, 16, 0xffff, n);
}


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Per Liden 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



static inline u16 msg_next_sent(struct tipc_msg *m)
{
	return msg_bits(m, 4, 0, 0xffff);
}

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Per Liden 23 95.83% 1 50.00%
Jon Paul Maloy 1 4.17% 1 50.00%
Total 24 100.00% 2 100.00%



static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
{
	msg_set_bits(m, 4, 0, 0xffff, n);
}

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Per Liden 27 96.43% 1 50.00%
Jon Paul Maloy 1 3.57% 1 50.00%
Total 28 100.00% 2 100.00%



static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 4, 0, 0xffff, n);
}

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Total 28 100.00% 1 100.00%



static inline u32 msg_bc_netid(struct tipc_msg *m)
{
	return msg_word(m, 4);
}

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Per Liden 20 100.00% 1 100.00%
Total 20 100.00% 1 100.00%



static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
{
	msg_set_word(m, 4, id);
}

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Per Liden 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline u32 msg_link_selector(struct tipc_msg *m)
{
	if (msg_user(m) == MSG_FRAGMENTER)
		m = (void *)msg_data(m);
	return msg_bits(m, 4, 0, 1);
}

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Per Liden 26 59.09% 1 50.00%
Jon Paul Maloy 18 40.91% 1 50.00%
Total 44 100.00% 2 100.00%

/*
 * Word 5
 */


static inline u16 msg_session(struct tipc_msg *m)
{
	return msg_bits(m, 5, 16, 0xffff);
}

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Per Liden 23 95.83% 1 50.00%
Jon Paul Maloy 1 4.17% 1 50.00%
Total 24 100.00% 2 100.00%



static inline void msg_set_session(struct tipc_msg *m, u16 n)
{
	msg_set_bits(m, 5, 16, 0xffff, n);
}

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Per Liden 27 96.43% 1 50.00%
Jon Paul Maloy 1 3.57% 1 50.00%
Total 28 100.00% 2 100.00%



static inline u32 msg_probe(struct tipc_msg *m)
{
	return msg_bits(m, 5, 0, 1);
}

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Per Liden 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline void msg_set_probe(struct tipc_msg *m, u32 val)
{
	msg_set_bits(m, 5, 0, 1, val);
}

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Per Liden 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



static inline char msg_net_plane(struct tipc_msg *m)
{
	return msg_bits(m, 5, 1, 7) + 'A';
}

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Per Liden 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static inline void msg_set_net_plane(struct tipc_msg *m, char n)
{
	msg_set_bits(m, 5, 1, 7, (n - 'A'));
}

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Per Liden 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%



static inline u32 msg_linkprio(struct tipc_msg *m)
{
	return msg_bits(m, 5, 4, 0x1f);
}

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Per Liden 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 5, 4, 0x1f, n);
}

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static inline u32 msg_bearer_id(struct tipc_msg *m)
{
	return msg_bits(m, 5, 9, 0x7);
}

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Total 24 100.00% 1 100.00%



static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
{
	msg_set_bits(m, 5, 9, 0x7, n);
}

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Per Liden 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



static inline u32 msg_redundant_link(struct tipc_msg *m)
{
	return msg_bits(m, 5, 12, 0x1);
}

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static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
{
	msg_set_bits(m, 5, 12, 0x1, r);
}

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Per Liden 24 85.71% 1 50.00%
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Total 28 100.00% 2 100.00%



static inline u32 msg_peer_stopping(struct tipc_msg *m)
{
	return msg_bits(m, 5, 13, 0x1);
}

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Total 24 100.00% 1 100.00%



static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s
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Total	24	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 net/tipc/msg.h

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