1289 строки
28 KiB
C
1289 строки
28 KiB
C
/*
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* net/tipc/msg.h: Include file for TIPC message header routines
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*
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* Copyright (c) 2000-2007, 2014-2017 Ericsson AB
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* Copyright (c) 2005-2008, 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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#ifndef _TIPC_MSG_H
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#define _TIPC_MSG_H
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#include <linux/tipc.h>
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#include "core.h"
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/*
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* Constants and routines used to read and write TIPC payload message headers
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*
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* Note: Some items are also used with TIPC internal message headers
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*/
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#define TIPC_VERSION 2
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struct plist;
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/*
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* Payload message users are defined in TIPC's public API:
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* - TIPC_LOW_IMPORTANCE
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* - TIPC_MEDIUM_IMPORTANCE
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* - TIPC_HIGH_IMPORTANCE
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* - TIPC_CRITICAL_IMPORTANCE
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*/
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#define TIPC_SYSTEM_IMPORTANCE 4
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/*
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* Payload message types
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*/
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#define TIPC_CONN_MSG 0
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#define TIPC_MCAST_MSG 1
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#define TIPC_NAMED_MSG 2
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#define TIPC_DIRECT_MSG 3
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#define TIPC_GRP_MEMBER_EVT 4
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#define TIPC_GRP_BCAST_MSG 5
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#define TIPC_GRP_MCAST_MSG 6
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#define TIPC_GRP_UCAST_MSG 7
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/*
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* Internal message users
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*/
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#define BCAST_PROTOCOL 5
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#define MSG_BUNDLER 6
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#define LINK_PROTOCOL 7
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#define CONN_MANAGER 8
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#define GROUP_PROTOCOL 9
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#define TUNNEL_PROTOCOL 10
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#define NAME_DISTRIBUTOR 11
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#define MSG_FRAGMENTER 12
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#define LINK_CONFIG 13
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#define SOCK_WAKEUP 14 /* pseudo user */
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#define TOP_SRV 15 /* pseudo user */
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/*
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* Message header sizes
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*/
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#define SHORT_H_SIZE 24 /* In-cluster basic payload message */
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#define BASIC_H_SIZE 32 /* Basic payload message */
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#define NAMED_H_SIZE 40 /* Named payload message */
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#define MCAST_H_SIZE 44 /* Multicast payload message */
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#define GROUP_H_SIZE 44 /* Group payload message */
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#define INT_H_SIZE 40 /* Internal messages */
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#define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
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#define MAX_H_SIZE 60 /* Largest possible TIPC header size */
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#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
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#define FB_MTU 3744
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#define TIPC_MEDIA_INFO_OFFSET 5
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struct tipc_skb_cb {
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union {
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struct {
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struct sk_buff *tail;
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unsigned long nxt_retr;
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unsigned long retr_stamp;
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u32 bytes_read;
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u32 orig_member;
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u16 chain_imp;
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u16 ackers;
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u16 retr_cnt;
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} __packed;
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#ifdef CONFIG_TIPC_CRYPTO
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struct {
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struct tipc_crypto *rx;
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struct tipc_aead *last;
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u8 recurs;
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} tx_clone_ctx __packed;
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#endif
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} __packed;
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union {
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struct {
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u8 validated:1;
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#ifdef CONFIG_TIPC_CRYPTO
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u8 encrypted:1;
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u8 decrypted:1;
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u8 probe:1;
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u8 tx_clone_deferred:1;
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#endif
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};
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u8 flags;
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};
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u8 reserved;
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#ifdef CONFIG_TIPC_CRYPTO
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void *crypto_ctx;
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#endif
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} __packed;
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#define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
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struct tipc_msg {
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__be32 hdr[15];
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};
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/* struct tipc_gap_ack - TIPC Gap ACK block
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* @ack: seqno of the last consecutive packet in link deferdq
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* @gap: number of gap packets since the last ack
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*
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* E.g:
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* link deferdq: 1 2 3 4 10 11 13 14 15 20
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* --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0>
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*/
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struct tipc_gap_ack {
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__be16 ack;
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__be16 gap;
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};
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/* struct tipc_gap_ack_blks
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* @len: actual length of the record
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* @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast
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* ones)
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* @start_index: starting index for "valid" broadcast Gap ACK blocks
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* @bgack_cnt: number of Gap ACK blocks for broadcast in the record
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* @gacks: array of Gap ACK blocks
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*
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* 31 16 15 0
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* +-------------+-------------+-------------+-------------+
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* | bgack_cnt | ugack_cnt | len |
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* +-------------+-------------+-------------+-------------+ -
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* | gap | ack | |
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* +-------------+-------------+-------------+-------------+ > bc gacks
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* : : : |
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* +-------------+-------------+-------------+-------------+ -
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* | gap | ack | |
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* +-------------+-------------+-------------+-------------+ > uc gacks
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* : : : |
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* +-------------+-------------+-------------+-------------+ -
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*/
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struct tipc_gap_ack_blks {
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__be16 len;
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union {
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u8 ugack_cnt;
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u8 start_index;
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};
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u8 bgack_cnt;
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struct tipc_gap_ack gacks[];
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};
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#define tipc_gap_ack_blks_sz(n) (sizeof(struct tipc_gap_ack_blks) + \
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sizeof(struct tipc_gap_ack) * (n))
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#define MAX_GAP_ACK_BLKS 128
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#define MAX_GAP_ACK_BLKS_SZ tipc_gap_ack_blks_sz(MAX_GAP_ACK_BLKS)
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static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
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{
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return (struct tipc_msg *)skb->data;
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}
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static inline u32 msg_word(struct tipc_msg *m, u32 pos)
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{
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return ntohl(m->hdr[pos]);
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}
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static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
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{
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m->hdr[w] = htonl(val);
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}
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static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
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{
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return (msg_word(m, w) >> pos) & mask;
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}
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static inline void msg_set_bits(struct tipc_msg *m, u32 w,
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u32 pos, u32 mask, u32 val)
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{
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val = (val & mask) << pos;
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mask = mask << pos;
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m->hdr[w] &= ~htonl(mask);
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m->hdr[w] |= htonl(val);
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}
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static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
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{
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u32 temp = msg->hdr[a];
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msg->hdr[a] = msg->hdr[b];
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msg->hdr[b] = temp;
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}
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/*
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* Word 0
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*/
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static inline u32 msg_version(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 29, 7);
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}
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static inline void msg_set_version(struct tipc_msg *m)
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{
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msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
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}
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static inline u32 msg_user(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 25, 0xf);
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}
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static inline u32 msg_isdata(struct tipc_msg *m)
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{
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return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
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}
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static inline void msg_set_user(struct tipc_msg *m, u32 n)
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{
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msg_set_bits(m, 0, 25, 0xf, n);
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}
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static inline u32 msg_hdr_sz(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 21, 0xf) << 2;
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}
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static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
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{
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msg_set_bits(m, 0, 21, 0xf, n>>2);
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}
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static inline u32 msg_size(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 0, 0x1ffff);
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}
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static inline u32 msg_blocks(struct tipc_msg *m)
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{
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return (msg_size(m) / 1024) + 1;
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}
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static inline u32 msg_data_sz(struct tipc_msg *m)
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{
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return msg_size(m) - msg_hdr_sz(m);
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}
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static inline int msg_non_seq(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 20, 1);
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}
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static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
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{
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msg_set_bits(m, 0, 20, 1, n);
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}
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static inline int msg_is_syn(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 17, 1);
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}
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static inline void msg_set_syn(struct tipc_msg *m, u32 d)
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{
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msg_set_bits(m, 0, 17, 1, d);
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}
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static inline int msg_dest_droppable(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 19, 1);
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}
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static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
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{
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msg_set_bits(m, 0, 19, 1, d);
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}
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static inline int msg_is_keepalive(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 19, 1);
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}
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static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
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{
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msg_set_bits(m, 0, 19, 1, d);
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}
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static inline int msg_src_droppable(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 18, 1);
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}
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static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
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{
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msg_set_bits(m, 0, 18, 1, d);
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}
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static inline int msg_ack_required(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 18, 1);
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}
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static inline void msg_set_ack_required(struct tipc_msg *m)
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{
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msg_set_bits(m, 0, 18, 1, 1);
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}
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static inline int msg_nagle_ack(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 18, 1);
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}
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static inline void msg_set_nagle_ack(struct tipc_msg *m)
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{
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msg_set_bits(m, 0, 18, 1, 1);
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}
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static inline bool msg_is_rcast(struct tipc_msg *m)
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{
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return msg_bits(m, 0, 18, 0x1);
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}
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static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
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{
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msg_set_bits(m, 0, 18, 0x1, d);
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}
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static inline void msg_set_size(struct tipc_msg *m, u32 sz)
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{
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m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
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}
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static inline unchar *msg_data(struct tipc_msg *m)
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{
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return ((unchar *)m) + msg_hdr_sz(m);
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}
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static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
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{
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return (struct tipc_msg *)msg_data(m);
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}
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/*
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* Word 1
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*/
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static inline u32 msg_type(struct tipc_msg *m)
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{
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return msg_bits(m, 1, 29, 0x7);
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}
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static inline void msg_set_type(struct tipc_msg *m, u32 n)
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{
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msg_set_bits(m, 1, 29, 0x7, n);
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}
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static inline int msg_in_group(struct tipc_msg *m)
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{
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int mtyp = msg_type(m);
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return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
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}
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static inline bool msg_is_grp_evt(struct tipc_msg *m)
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{
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return msg_type(m) == TIPC_GRP_MEMBER_EVT;
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}
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static inline u32 msg_named(struct tipc_msg *m)
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{
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return msg_type(m) == TIPC_NAMED_MSG;
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}
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static inline u32 msg_mcast(struct tipc_msg *m)
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{
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int mtyp = msg_type(m);
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return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
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(mtyp == TIPC_GRP_MCAST_MSG));
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}
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static inline u32 msg_connected(struct tipc_msg *m)
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{
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return msg_type(m) == TIPC_CONN_MSG;
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}
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static inline u32 msg_direct(struct tipc_msg *m)
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{
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return msg_type(m) == TIPC_DIRECT_MSG;
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}
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static inline u32 msg_errcode(struct tipc_msg *m)
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{
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return msg_bits(m, 1, 25, 0xf);
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}
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static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
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{
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msg_set_bits(m, 1, 25, 0xf, err);
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}
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static inline u32 msg_reroute_cnt(struct tipc_msg *m)
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{
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return msg_bits(m, 1, 21, 0xf);
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}
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static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
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{
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msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
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}
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static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
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{
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msg_set_bits(m, 1, 21, 0xf, 0);
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}
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static inline u32 msg_lookup_scope(struct tipc_msg *m)
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{
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return msg_bits(m, 1, 19, 0x3);
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}
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static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
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{
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msg_set_bits(m, 1, 19, 0x3, n);
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}
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static inline u16 msg_bcast_ack(struct tipc_msg *m)
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{
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return msg_bits(m, 1, 0, 0xffff);
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}
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static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
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{
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msg_set_bits(m, 1, 0, 0xffff, n);
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}
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/* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
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* link peer session number
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*/
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static inline bool msg_dest_session_valid(struct tipc_msg *m)
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{
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return msg_bits(m, 1, 16, 0x1);
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}
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static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
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{
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msg_set_bits(m, 1, 16, 0x1, valid);
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}
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static inline u16 msg_dest_session(struct tipc_msg *m)
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{
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return msg_bits(m, 1, 0, 0xffff);
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}
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static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
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{
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msg_set_bits(m, 1, 0, 0xffff, n);
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}
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/*
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* Word 2
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*/
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static inline u16 msg_ack(struct tipc_msg *m)
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{
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return msg_bits(m, 2, 16, 0xffff);
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}
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static inline void msg_set_ack(struct tipc_msg *m, u16 n)
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{
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msg_set_bits(m, 2, 16, 0xffff, n);
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}
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static inline u16 msg_seqno(struct tipc_msg *m)
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{
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return msg_bits(m, 2, 0, 0xffff);
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}
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static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
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{
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msg_set_bits(m, 2, 0, 0xffff, n);
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}
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/*
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* Words 3-10
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*/
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static inline u32 msg_importance(struct tipc_msg *m)
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{
|
|
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;
|
|
}
|
|
|
|
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");
|
|
}
|
|
|
|
static inline u32 msg_prevnode(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 3);
|
|
}
|
|
|
|
static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
|
|
{
|
|
msg_set_word(m, 3, a);
|
|
}
|
|
|
|
static inline u32 msg_origport(struct tipc_msg *m)
|
|
{
|
|
if (msg_user(m) == MSG_FRAGMENTER)
|
|
m = msg_inner_hdr(m);
|
|
return msg_word(m, 4);
|
|
}
|
|
|
|
static inline void msg_set_origport(struct tipc_msg *m, u32 p)
|
|
{
|
|
msg_set_word(m, 4, p);
|
|
}
|
|
|
|
static inline u32 msg_destport(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 5);
|
|
}
|
|
|
|
static inline void msg_set_destport(struct tipc_msg *m, u32 p)
|
|
{
|
|
msg_set_word(m, 5, p);
|
|
}
|
|
|
|
static inline u32 msg_mc_netid(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 5);
|
|
}
|
|
|
|
static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
|
|
{
|
|
msg_set_word(m, 5, p);
|
|
}
|
|
|
|
static inline int msg_short(struct tipc_msg *m)
|
|
{
|
|
return msg_hdr_sz(m) == SHORT_H_SIZE;
|
|
}
|
|
|
|
static inline u32 msg_orignode(struct tipc_msg *m)
|
|
{
|
|
if (likely(msg_short(m)))
|
|
return msg_prevnode(m);
|
|
return msg_word(m, 6);
|
|
}
|
|
|
|
static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
|
|
{
|
|
msg_set_word(m, 6, a);
|
|
}
|
|
|
|
static inline u32 msg_destnode(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 7);
|
|
}
|
|
|
|
static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
|
|
{
|
|
msg_set_word(m, 7, a);
|
|
}
|
|
|
|
static inline u32 msg_nametype(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 8);
|
|
}
|
|
|
|
static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_word(m, 8, n);
|
|
}
|
|
|
|
static inline u32 msg_nameinst(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 9);
|
|
}
|
|
|
|
static inline u32 msg_namelower(struct tipc_msg *m)
|
|
{
|
|
return msg_nameinst(m);
|
|
}
|
|
|
|
static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_word(m, 9, n);
|
|
}
|
|
|
|
static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_namelower(m, n);
|
|
}
|
|
|
|
static inline u32 msg_nameupper(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 10);
|
|
}
|
|
|
|
static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_word(m, 10, n);
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
#define DSC_TRIAL_MSG 2
|
|
#define DSC_TRIAL_FAIL_MSG 3
|
|
|
|
/*
|
|
* Group protocol message types
|
|
*/
|
|
#define GRP_JOIN_MSG 0
|
|
#define GRP_LEAVE_MSG 1
|
|
#define GRP_ADV_MSG 2
|
|
#define GRP_ACK_MSG 3
|
|
#define GRP_RECLAIM_MSG 4
|
|
#define GRP_REMIT_MSG 5
|
|
|
|
/*
|
|
* Word 1
|
|
*/
|
|
static inline u32 msg_seq_gap(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 1, 16, 0x1fff);
|
|
}
|
|
|
|
static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 1, 16, 0x1fff, n);
|
|
}
|
|
|
|
static inline u32 msg_node_sig(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 1, 0, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 1, 0, 0xffff, n);
|
|
}
|
|
|
|
static inline u32 msg_node_capabilities(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 1, 15, 0x1fff);
|
|
}
|
|
|
|
static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 1, 15, 0x1fff, n);
|
|
}
|
|
|
|
/*
|
|
* Word 2
|
|
*/
|
|
static inline u32 msg_dest_domain(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 2);
|
|
}
|
|
|
|
static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_word(m, 2, n);
|
|
}
|
|
|
|
static inline u32 msg_bcgap_after(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 2, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 2, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u32 msg_bcgap_to(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 2, 0, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 2, 0, 0xffff, n);
|
|
}
|
|
|
|
/*
|
|
* Word 4
|
|
*/
|
|
static inline u32 msg_last_bcast(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 4, 16, 0xffff);
|
|
}
|
|
|
|
static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
|
|
{
|
|
return msg_last_bcast(m) + 1;
|
|
}
|
|
|
|
static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 4, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u32 msg_nof_fragms(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 4, 0, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 4, 0, 0xffff, n);
|
|
}
|
|
|
|
static inline u32 msg_fragm_no(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 4, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 4, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u16 msg_next_sent(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 4, 0, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
|
|
{
|
|
msg_set_bits(m, 4, 0, 0xffff, n);
|
|
}
|
|
|
|
static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 4, 0, 0xffff, n);
|
|
}
|
|
|
|
static inline u32 msg_bc_netid(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 4);
|
|
}
|
|
|
|
static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
|
|
{
|
|
msg_set_word(m, 4, id);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Word 5
|
|
*/
|
|
static inline u16 msg_session(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 5, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_session(struct tipc_msg *m, u16 n)
|
|
{
|
|
msg_set_bits(m, 5, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u32 msg_probe(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 5, 0, 1);
|
|
}
|
|
|
|
static inline void msg_set_probe(struct tipc_msg *m, u32 val)
|
|
{
|
|
msg_set_bits(m, 5, 0, 1, val);
|
|
}
|
|
|
|
static inline char msg_net_plane(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 5, 1, 7) + 'A';
|
|
}
|
|
|
|
static inline void msg_set_net_plane(struct tipc_msg *m, char n)
|
|
{
|
|
msg_set_bits(m, 5, 1, 7, (n - 'A'));
|
|
}
|
|
|
|
static inline u32 msg_linkprio(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 5, 4, 0x1f);
|
|
}
|
|
|
|
static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 5, 4, 0x1f, n);
|
|
}
|
|
|
|
static inline u32 msg_bearer_id(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 5, 9, 0x7);
|
|
}
|
|
|
|
static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 5, 9, 0x7, n);
|
|
}
|
|
|
|
static inline u32 msg_redundant_link(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 5, 12, 0x1);
|
|
}
|
|
|
|
static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
|
|
{
|
|
msg_set_bits(m, 5, 12, 0x1, r);
|
|
}
|
|
|
|
static inline u32 msg_peer_stopping(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 5, 13, 0x1);
|
|
}
|
|
|
|
static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
|
|
{
|
|
msg_set_bits(m, 5, 13, 0x1, s);
|
|
}
|
|
|
|
static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
|
|
{
|
|
switch (msg_user(m)) {
|
|
case BCAST_PROTOCOL:
|
|
case NAME_DISTRIBUTOR:
|
|
case LINK_PROTOCOL:
|
|
return msg_bits(m, 5, 14, 0x1);
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
|
|
{
|
|
msg_set_bits(m, 5, 14, 0x1, invalid);
|
|
}
|
|
|
|
static inline char *msg_media_addr(struct tipc_msg *m)
|
|
{
|
|
return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
|
|
}
|
|
|
|
static inline u32 msg_bc_gap(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 8, 0, 0x3ff);
|
|
}
|
|
|
|
static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 8, 0, 0x3ff, n);
|
|
}
|
|
|
|
/*
|
|
* Word 9
|
|
*/
|
|
static inline u16 msg_msgcnt(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
|
|
{
|
|
msg_set_bits(m, 9, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u16 msg_syncpt(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_syncpt(struct tipc_msg *m, u16 n)
|
|
{
|
|
msg_set_bits(m, 9, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u32 msg_conn_ack(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 9, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u16 msg_adv_win(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 0, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
|
|
{
|
|
msg_set_bits(m, 9, 0, 0xffff, n);
|
|
}
|
|
|
|
static inline u32 msg_max_pkt(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 16, 0xffff) * 4;
|
|
}
|
|
|
|
static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 9, 16, 0xffff, (n / 4));
|
|
}
|
|
|
|
static inline u32 msg_link_tolerance(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 0, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 9, 0, 0xffff, n);
|
|
}
|
|
|
|
static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
|
|
{
|
|
msg_set_bits(m, 9, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
|
|
{
|
|
msg_set_bits(m, 9, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline u16 msg_grp_remitted(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 9, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
|
|
{
|
|
msg_set_bits(m, 9, 16, 0xffff, n);
|
|
}
|
|
|
|
/* Word 10
|
|
*/
|
|
static inline u16 msg_grp_evt(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 10, 0, 0x3);
|
|
}
|
|
|
|
static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
|
|
{
|
|
msg_set_bits(m, 10, 0, 0x3, n);
|
|
}
|
|
|
|
static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 10, 0, 0x1);
|
|
}
|
|
|
|
static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
|
|
{
|
|
msg_set_bits(m, 10, 0, 0x1, n);
|
|
}
|
|
|
|
static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
|
|
{
|
|
return msg_bits(m, 10, 16, 0xffff);
|
|
}
|
|
|
|
static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_bits(m, 10, 16, 0xffff, n);
|
|
}
|
|
|
|
static inline bool msg_peer_link_is_up(struct tipc_msg *m)
|
|
{
|
|
if (likely(msg_user(m) != LINK_PROTOCOL))
|
|
return true;
|
|
if (msg_type(m) == STATE_MSG)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline bool msg_peer_node_is_up(struct tipc_msg *m)
|
|
{
|
|
if (msg_peer_link_is_up(m))
|
|
return true;
|
|
return msg_redundant_link(m);
|
|
}
|
|
|
|
static inline bool msg_is_reset(struct tipc_msg *hdr)
|
|
{
|
|
return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
|
|
}
|
|
|
|
/* Word 13
|
|
*/
|
|
static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_word(m, 13, n);
|
|
}
|
|
|
|
static inline u32 msg_peer_net_hash(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 13);
|
|
}
|
|
|
|
/* Word 14
|
|
*/
|
|
static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
|
|
{
|
|
return msg_word(m, 14);
|
|
}
|
|
|
|
static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
|
|
{
|
|
msg_set_word(m, 14, n);
|
|
}
|
|
|
|
static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
|
|
{
|
|
memcpy(msg_data(hdr), id, 16);
|
|
}
|
|
|
|
static inline u8 *msg_node_id(struct tipc_msg *hdr)
|
|
{
|
|
return (u8 *)msg_data(hdr);
|
|
}
|
|
|
|
struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
|
|
bool tipc_msg_validate(struct sk_buff **_skb);
|
|
bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
|
|
void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
|
|
struct sk_buff_head *xmitq);
|
|
void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
|
|
u32 hsize, u32 destnode);
|
|
struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
|
|
uint data_sz, u32 dnode, u32 onode,
|
|
u32 dport, u32 oport, int errcode);
|
|
int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
|
|
bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss,
|
|
u32 dnode, bool *new_bundle);
|
|
bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
|
|
int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr,
|
|
int pktmax, struct sk_buff_head *frags);
|
|
int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
|
|
int offset, int dsz, int mtu, struct sk_buff_head *list);
|
|
int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen,
|
|
int mss, struct sk_buff_head *txq);
|
|
bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
|
|
bool tipc_msg_assemble(struct sk_buff_head *list);
|
|
bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
|
|
bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
|
|
struct sk_buff_head *cpy);
|
|
bool __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
|
|
struct sk_buff *skb);
|
|
bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy);
|
|
|
|
static inline u16 buf_seqno(struct sk_buff *skb)
|
|
{
|
|
return msg_seqno(buf_msg(skb));
|
|
}
|
|
|
|
static inline int buf_roundup_len(struct sk_buff *skb)
|
|
{
|
|
return (skb->len / 1024 + 1) * 1024;
|
|
}
|
|
|
|
/* tipc_skb_peek(): peek and reserve first buffer in list
|
|
* @list: list to be peeked in
|
|
* Returns pointer to first buffer in list, if any
|
|
*/
|
|
static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
|
|
spinlock_t *lock)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
spin_lock_bh(lock);
|
|
skb = skb_peek(list);
|
|
if (skb)
|
|
skb_get(skb);
|
|
spin_unlock_bh(lock);
|
|
return skb;
|
|
}
|
|
|
|
/* tipc_skb_peek_port(): find a destination port, ignoring all destinations
|
|
* up to and including 'filter'.
|
|
* Note: ignoring previously tried destinations minimizes the risk of
|
|
* contention on the socket lock
|
|
* @list: list to be peeked in
|
|
* @filter: last destination to be ignored from search
|
|
* Returns a destination port number, of applicable.
|
|
*/
|
|
static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
|
|
{
|
|
struct sk_buff *skb;
|
|
u32 dport = 0;
|
|
bool ignore = true;
|
|
|
|
spin_lock_bh(&list->lock);
|
|
skb_queue_walk(list, skb) {
|
|
dport = msg_destport(buf_msg(skb));
|
|
if (!filter || skb_queue_is_last(list, skb))
|
|
break;
|
|
if (dport == filter)
|
|
ignore = false;
|
|
else if (!ignore)
|
|
break;
|
|
}
|
|
spin_unlock_bh(&list->lock);
|
|
return dport;
|
|
}
|
|
|
|
/* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
|
|
* @list: list to be unlinked from
|
|
* @dport: selection criteria for buffer to unlink
|
|
*/
|
|
static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
|
|
u32 dport)
|
|
{
|
|
struct sk_buff *_skb, *tmp, *skb = NULL;
|
|
|
|
spin_lock_bh(&list->lock);
|
|
skb_queue_walk_safe(list, _skb, tmp) {
|
|
if (msg_destport(buf_msg(_skb)) == dport) {
|
|
__skb_unlink(_skb, list);
|
|
skb = _skb;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_bh(&list->lock);
|
|
return skb;
|
|
}
|
|
|
|
/* tipc_skb_queue_splice_tail - append an skb list to lock protected list
|
|
* @list: the new list to append. Not lock protected
|
|
* @head: target list. Lock protected.
|
|
*/
|
|
static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
|
|
struct sk_buff_head *head)
|
|
{
|
|
spin_lock_bh(&head->lock);
|
|
skb_queue_splice_tail(list, head);
|
|
spin_unlock_bh(&head->lock);
|
|
}
|
|
|
|
/* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
|
|
* @list: the new list to add. Lock protected. Will be reinitialized
|
|
* @head: target list. Lock protected.
|
|
*/
|
|
static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
|
|
struct sk_buff_head *head)
|
|
{
|
|
struct sk_buff_head tmp;
|
|
|
|
__skb_queue_head_init(&tmp);
|
|
|
|
spin_lock_bh(&list->lock);
|
|
skb_queue_splice_tail_init(list, &tmp);
|
|
spin_unlock_bh(&list->lock);
|
|
tipc_skb_queue_splice_tail(&tmp, head);
|
|
}
|
|
|
|
/* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno
|
|
* @list: list to be dequeued from
|
|
* @seqno: seqno of the expected msg
|
|
*
|
|
* returns skb dequeued from the list if its seqno is less than or equal to
|
|
* the expected one, otherwise the skb is still hold
|
|
*
|
|
* Note: must be used with appropriate locks held only
|
|
*/
|
|
static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list,
|
|
u16 seqno)
|
|
{
|
|
struct sk_buff *skb = skb_peek(list);
|
|
|
|
if (skb && less_eq(buf_seqno(skb), seqno)) {
|
|
__skb_unlink(skb, list);
|
|
return skb;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|