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- /*
- * net/tipc/msg.h: Include file for TIPC message header routines
- *
- * Copyright (c) 2000-2007, 2014-2017 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
- #define TIPC_GRP_MEMBER_EVT 4
- #define TIPC_GRP_BCAST_MSG 5
- #define TIPC_GRP_MCAST_MSG 6
- #define TIPC_GRP_UCAST_MSG 7
- /*
- * Internal message users
- */
- #define BCAST_PROTOCOL 5
- #define MSG_BUNDLER 6
- #define LINK_PROTOCOL 7
- #define CONN_MANAGER 8
- #define GROUP_PROTOCOL 9
- #define TUNNEL_PROTOCOL 10
- #define NAME_DISTRIBUTOR 11
- #define MSG_FRAGMENTER 12
- #define LINK_CONFIG 13
- #define MSG_CRYPTO 14
- #define SOCK_WAKEUP 14 /* pseudo user */
- #define TOP_SRV 15 /* 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 GROUP_H_SIZE 44 /* Group 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
- extern const int one_page_mtu;
- struct tipc_skb_cb {
- union {
- struct {
- struct sk_buff *tail;
- unsigned long nxt_retr;
- unsigned long retr_stamp;
- u32 bytes_read;
- u32 orig_member;
- u16 chain_imp;
- u16 ackers;
- u16 retr_cnt;
- } __packed;
- #ifdef CONFIG_TIPC_CRYPTO
- struct {
- struct tipc_crypto *rx;
- struct tipc_aead *last;
- u8 recurs;
- } tx_clone_ctx __packed;
- #endif
- } __packed;
- union {
- struct {
- u8 validated:1;
- #ifdef CONFIG_TIPC_CRYPTO
- u8 encrypted:1;
- u8 decrypted:1;
- #define SKB_PROBING 1
- #define SKB_GRACING 2
- u8 xmit_type:2;
- u8 tx_clone_deferred:1;
- #endif
- };
- u8 flags;
- };
- u8 reserved;
- #ifdef CONFIG_TIPC_CRYPTO
- void *crypto_ctx;
- #endif
- } __packed;
- #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
- struct tipc_msg {
- __be32 hdr[15];
- };
- /* struct tipc_gap_ack - TIPC Gap ACK block
- * @ack: seqno of the last consecutive packet in link deferdq
- * @gap: number of gap packets since the last ack
- *
- * E.g:
- * link deferdq: 1 2 3 4 10 11 13 14 15 20
- * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0>
- */
- struct tipc_gap_ack {
- __be16 ack;
- __be16 gap;
- };
- /* struct tipc_gap_ack_blks
- * @len: actual length of the record
- * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast
- * ones)
- * @start_index: starting index for "valid" broadcast Gap ACK blocks
- * @bgack_cnt: number of Gap ACK blocks for broadcast in the record
- * @gacks: array of Gap ACK blocks
- *
- * 31 16 15 0
- * +-------------+-------------+-------------+-------------+
- * | bgack_cnt | ugack_cnt | len |
- * +-------------+-------------+-------------+-------------+ -
- * | gap | ack | |
- * +-------------+-------------+-------------+-------------+ > bc gacks
- * : : : |
- * +-------------+-------------+-------------+-------------+ -
- * | gap | ack | |
- * +-------------+-------------+-------------+-------------+ > uc gacks
- * : : : |
- * +-------------+-------------+-------------+-------------+ -
- */
- struct tipc_gap_ack_blks {
- __be16 len;
- union {
- u8 ugack_cnt;
- u8 start_index;
- };
- u8 bgack_cnt;
- struct tipc_gap_ack gacks[];
- };
- #define MAX_GAP_ACK_BLKS 128
- #define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \
- sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS)
- static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
- {
- return (struct tipc_msg *)skb->data;
- }
- static inline u32 msg_word(struct tipc_msg *m, u32 pos)
- {
- return ntohl(m->hdr[pos]);
- }
- static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
- {
- m->hdr[w] = htonl(val);
- }
- static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
- {
- return (msg_word(m, w) >> pos) & mask;
- }
- 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);
- }
- /*
- * Word 0
- */
- static inline u32 msg_version(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 29, 7);
- }
- static inline void msg_set_version(struct tipc_msg *m)
- {
- msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
- }
- static inline u32 msg_user(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 25, 0xf);
- }
- static inline u32 msg_isdata(struct tipc_msg *m)
- {
- return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
- }
- static inline void msg_set_user(struct tipc_msg *m, u32 n)
- {
- msg_set_bits(m, 0, 25, 0xf, n);
- }
- static inline u32 msg_hdr_sz(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 21, 0xf) << 2;
- }
- static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
- {
- msg_set_bits(m, 0, 21, 0xf, n>>2);
- }
- static inline u32 msg_size(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 0, 0x1ffff);
- }
- static inline u32 msg_blocks(struct tipc_msg *m)
- {
- return (msg_size(m) / 1024) + 1;
- }
- static inline u32 msg_data_sz(struct tipc_msg *m)
- {
- return msg_size(m) - msg_hdr_sz(m);
- }
- static inline int msg_non_seq(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 20, 1);
- }
- static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
- {
- msg_set_bits(m, 0, 20, 1, n);
- }
- static inline int msg_is_syn(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 17, 1);
- }
- static inline void msg_set_syn(struct tipc_msg *m, u32 d)
- {
- msg_set_bits(m, 0, 17, 1, d);
- }
- static inline int msg_dest_droppable(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 19, 1);
- }
- static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
- {
- msg_set_bits(m, 0, 19, 1, d);
- }
- static inline int msg_is_keepalive(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 19, 1);
- }
- static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
- {
- msg_set_bits(m, 0, 19, 1, d);
- }
- static inline int msg_src_droppable(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 18, 1);
- }
- static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
- {
- msg_set_bits(m, 0, 18, 1, d);
- }
- static inline int msg_ack_required(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 18, 1);
- }
- static inline void msg_set_ack_required(struct tipc_msg *m)
- {
- msg_set_bits(m, 0, 18, 1, 1);
- }
- static inline int msg_nagle_ack(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 18, 1);
- }
- static inline void msg_set_nagle_ack(struct tipc_msg *m)
- {
- msg_set_bits(m, 0, 18, 1, 1);
- }
- static inline bool msg_is_rcast(struct tipc_msg *m)
- {
- return msg_bits(m, 0, 18, 0x1);
- }
- static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
- {
- msg_set_bits(m, 0, 18, 0x1, d);
- }
- static inline void msg_set_size(struct tipc_msg *m, u32 sz)
- {
- m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
- }
- static inline unchar *msg_data(struct tipc_msg *m)
- {
- return ((unchar *)m) + msg_hdr_sz(m);
- }
- static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
- {
- return (struct tipc_msg *)msg_data(m);
- }
- /*
- * Word 1
- */
- static inline u32 msg_type(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 29, 0x7);
- }
- static inline void msg_set_type(struct tipc_msg *m, u32 n)
- {
- msg_set_bits(m, 1, 29, 0x7, n);
- }
- static inline int msg_in_group(struct tipc_msg *m)
- {
- int mtyp = msg_type(m);
- return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
- }
- static inline bool msg_is_grp_evt(struct tipc_msg *m)
- {
- return msg_type(m) == TIPC_GRP_MEMBER_EVT;
- }
- static inline u32 msg_named(struct tipc_msg *m)
- {
- return msg_type(m) == TIPC_NAMED_MSG;
- }
- static inline u32 msg_mcast(struct tipc_msg *m)
- {
- int mtyp = msg_type(m);
- return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
- (mtyp == TIPC_GRP_MCAST_MSG));
- }
- static inline u32 msg_connected(struct tipc_msg *m)
- {
- return msg_type(m) == TIPC_CONN_MSG;
- }
- static inline u32 msg_direct(struct tipc_msg *m)
- {
- return msg_type(m) == TIPC_DIRECT_MSG;
- }
- static inline u32 msg_errcode(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 25, 0xf);
- }
- static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
- {
- msg_set_bits(m, 1, 25, 0xf, err);
- }
- static inline void msg_set_bulk(struct tipc_msg *m)
- {
- msg_set_bits(m, 1, 28, 0x1, 1);
- }
- static inline u32 msg_is_bulk(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 28, 0x1);
- }
- static inline void msg_set_last_bulk(struct tipc_msg *m)
- {
- msg_set_bits(m, 1, 27, 0x1, 1);
- }
- static inline u32 msg_is_last_bulk(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 27, 0x1);
- }
- static inline void msg_set_non_legacy(struct tipc_msg *m)
- {
- msg_set_bits(m, 1, 26, 0x1, 1);
- }
- static inline u32 msg_is_legacy(struct tipc_msg *m)
- {
- return !msg_bits(m, 1, 26, 0x1);
- }
- static inline u32 msg_reroute_cnt(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 21, 0xf);
- }
- static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
- {
- msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
- }
- static inline u32 msg_lookup_scope(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 19, 0x3);
- }
- static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
- {
- msg_set_bits(m, 1, 19, 0x3, n);
- }
- static inline u16 msg_bcast_ack(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 0, 0xffff);
- }
- static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
- {
- msg_set_bits(m, 1, 0, 0xffff, n);
- }
- /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
- * link peer session number
- */
- static inline bool msg_dest_session_valid(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 16, 0x1);
- }
- static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
- {
- msg_set_bits(m, 1, 16, 0x1, valid);
- }
- static inline u16 msg_dest_session(struct tipc_msg *m)
- {
- return msg_bits(m, 1, 0, 0xffff);
- }
- static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
- {
- msg_set_bits(m, 1, 0, 0xffff, n);
- }
- /*
- * Word 2
- */
- static inline u16 msg_ack(struct tipc_msg *m)
- {
- return msg_bits(m, 2, 16, 0xffff);
- }
- static inline void msg_set_ack(struct tipc_msg *m, u16 n)
- {
- msg_set_bits(m, 2, 16, 0xffff, n);
- }
- static inline u16 msg_seqno(struct tipc_msg *m)
- {
- return msg_bits(m, 2, 0, 0xffff);
- }
- static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
- {
- msg_set_bits(m, 2, 0, 0xffff, n);
- }
- /*
- * 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;
- }
- 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 u16 msg_named_seqno(struct tipc_msg *m)
- {
- return msg_bits(m, 4, 0, 0xffff);
- }
- static inline void msg_set_named_seqno(struct tipc_msg *m, u16 n)
- {
- msg_set_bits(m, 4, 0, 0xffff, n);
- }
- 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
- /* Crypto message types */
- #define KEY_DISTR_MSG 0
- /*
- * 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 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 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
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