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Diffstat (limited to 'net/tipc/msg.h')
| -rw-r--r-- | net/tipc/msg.h | 1310 |
1 files changed, 1310 insertions, 0 deletions
diff --git a/net/tipc/msg.h b/net/tipc/msg.h new file mode 100644 index 000000000..c5eec1621 --- /dev/null +++ b/net/tipc/msg.h @@ -0,0 +1,1310 @@ +/* + * 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 |