1b97bf3fdSPer Liden /* 2b97bf3fdSPer Liden * net/tipc/bcast.c: TIPC broadcast code 3b97bf3fdSPer Liden * 4078bec82SJon Paul Maloy * Copyright (c) 2004-2006, 2014, Ericsson AB 5b97bf3fdSPer Liden * Copyright (c) 2004, Intel Corporation. 62d627b92SAllan Stephens * Copyright (c) 2005, 2010-2011, Wind River Systems 7b97bf3fdSPer Liden * All rights reserved. 8b97bf3fdSPer Liden * 9b97bf3fdSPer Liden * Redistribution and use in source and binary forms, with or without 10b97bf3fdSPer Liden * modification, are permitted provided that the following conditions are met: 11b97bf3fdSPer Liden * 129ea1fd3cSPer Liden * 1. Redistributions of source code must retain the above copyright 139ea1fd3cSPer Liden * notice, this list of conditions and the following disclaimer. 149ea1fd3cSPer Liden * 2. Redistributions in binary form must reproduce the above copyright 159ea1fd3cSPer Liden * notice, this list of conditions and the following disclaimer in the 169ea1fd3cSPer Liden * documentation and/or other materials provided with the distribution. 179ea1fd3cSPer Liden * 3. Neither the names of the copyright holders nor the names of its 189ea1fd3cSPer Liden * contributors may be used to endorse or promote products derived from 199ea1fd3cSPer Liden * this software without specific prior written permission. 209ea1fd3cSPer Liden * 219ea1fd3cSPer Liden * Alternatively, this software may be distributed under the terms of the 229ea1fd3cSPer Liden * GNU General Public License ("GPL") version 2 as published by the Free 239ea1fd3cSPer Liden * Software Foundation. 24b97bf3fdSPer Liden * 25b97bf3fdSPer Liden * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 26b97bf3fdSPer Liden * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27b97bf3fdSPer Liden * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28b97bf3fdSPer Liden * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 29b97bf3fdSPer Liden * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30b97bf3fdSPer Liden * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31b97bf3fdSPer Liden * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32b97bf3fdSPer Liden * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33b97bf3fdSPer Liden * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34b97bf3fdSPer Liden * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35b97bf3fdSPer Liden * POSSIBILITY OF SUCH DAMAGE. 36b97bf3fdSPer Liden */ 37b97bf3fdSPer Liden 38078bec82SJon Paul Maloy #include "socket.h" 39078bec82SJon Paul Maloy #include "msg.h" 40b97bf3fdSPer Liden #include "bcast.h" 419f6bdcd4SAllan Stephens #include "name_distr.h" 421da46568SYing Xue #include "core.h" 43b97bf3fdSPer Liden 44b97bf3fdSPer Liden #define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */ 45b97bf3fdSPer Liden #define BCLINK_WIN_DEFAULT 20 /* bcast link window size (default) */ 46c47e9b91SAllan Stephens 473aec9cc9SAllan Stephens const char tipc_bclink_name[] = "broadcast-link"; 48b97bf3fdSPer Liden 4931e3c3f6Sstephen hemminger static void tipc_nmap_diff(struct tipc_node_map *nm_a, 5031e3c3f6Sstephen hemminger struct tipc_node_map *nm_b, 5131e3c3f6Sstephen hemminger struct tipc_node_map *nm_diff); 5228dd9418SYing Xue static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node); 5328dd9418SYing Xue static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node); 54b97bf3fdSPer Liden 551da46568SYing Xue static void tipc_bclink_lock(struct net *net) 56d69afc90SYing Xue { 571da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 581da46568SYing Xue 591da46568SYing Xue spin_lock_bh(&tn->bclink->lock); 60d69afc90SYing Xue } 61d69afc90SYing Xue 621da46568SYing Xue static void tipc_bclink_unlock(struct net *net) 63d69afc90SYing Xue { 641da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 653f5a12bdSYing Xue struct tipc_node *node = NULL; 663f5a12bdSYing Xue 671da46568SYing Xue if (likely(!tn->bclink->flags)) { 681da46568SYing Xue spin_unlock_bh(&tn->bclink->lock); 693f5a12bdSYing Xue return; 703f5a12bdSYing Xue } 713f5a12bdSYing Xue 721da46568SYing Xue if (tn->bclink->flags & TIPC_BCLINK_RESET) { 731da46568SYing Xue tn->bclink->flags &= ~TIPC_BCLINK_RESET; 741da46568SYing Xue node = tipc_bclink_retransmit_to(net); 753f5a12bdSYing Xue } 761da46568SYing Xue spin_unlock_bh(&tn->bclink->lock); 773f5a12bdSYing Xue 783f5a12bdSYing Xue if (node) 793f5a12bdSYing Xue tipc_link_reset_all(node); 803f5a12bdSYing Xue } 813f5a12bdSYing Xue 82078bec82SJon Paul Maloy uint tipc_bclink_get_mtu(void) 83078bec82SJon Paul Maloy { 84078bec82SJon Paul Maloy return MAX_PKT_DEFAULT_MCAST; 85078bec82SJon Paul Maloy } 86078bec82SJon Paul Maloy 871da46568SYing Xue void tipc_bclink_set_flags(struct net *net, unsigned int flags) 883f5a12bdSYing Xue { 891da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 901da46568SYing Xue 911da46568SYing Xue tn->bclink->flags |= flags; 92d69afc90SYing Xue } 93d69afc90SYing Xue 9405790c64SSam Ravnborg static u32 bcbuf_acks(struct sk_buff *buf) 95b97bf3fdSPer Liden { 96880b005fSDavid S. Miller return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle; 97b97bf3fdSPer Liden } 98b97bf3fdSPer Liden 9905790c64SSam Ravnborg static void bcbuf_set_acks(struct sk_buff *buf, u32 acks) 100b97bf3fdSPer Liden { 101880b005fSDavid S. Miller TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks; 102b97bf3fdSPer Liden } 103b97bf3fdSPer Liden 10405790c64SSam Ravnborg static void bcbuf_decr_acks(struct sk_buff *buf) 105b97bf3fdSPer Liden { 106b97bf3fdSPer Liden bcbuf_set_acks(buf, bcbuf_acks(buf) - 1); 107b97bf3fdSPer Liden } 108b97bf3fdSPer Liden 1091da46568SYing Xue void tipc_bclink_add_node(struct net *net, u32 addr) 110cd3decdfSAllan Stephens { 1111da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 1121da46568SYing Xue 1131da46568SYing Xue tipc_bclink_lock(net); 1141da46568SYing Xue tipc_nmap_add(&tn->bclink->bcast_nodes, addr); 1151da46568SYing Xue tipc_bclink_unlock(net); 116cd3decdfSAllan Stephens } 117cd3decdfSAllan Stephens 1181da46568SYing Xue void tipc_bclink_remove_node(struct net *net, u32 addr) 119cd3decdfSAllan Stephens { 1201da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 1211da46568SYing Xue 1221da46568SYing Xue tipc_bclink_lock(net); 1231da46568SYing Xue tipc_nmap_remove(&tn->bclink->bcast_nodes, addr); 1241da46568SYing Xue tipc_bclink_unlock(net); 125cd3decdfSAllan Stephens } 126b97bf3fdSPer Liden 1271da46568SYing Xue static void bclink_set_last_sent(struct net *net) 1285b1f7bdeSAllan Stephens { 1291da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 1301da46568SYing Xue struct tipc_link *bcl = tn->bcl; 1311da46568SYing Xue 1325b1f7bdeSAllan Stephens if (bcl->next_out) 1335b1f7bdeSAllan Stephens bcl->fsm_msg_cnt = mod(buf_seqno(bcl->next_out) - 1); 1345b1f7bdeSAllan Stephens else 1355b1f7bdeSAllan Stephens bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1); 1365b1f7bdeSAllan Stephens } 1375b1f7bdeSAllan Stephens 1381da46568SYing Xue u32 tipc_bclink_get_last_sent(struct net *net) 1395b1f7bdeSAllan Stephens { 1401da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 1411da46568SYing Xue 1421da46568SYing Xue return tn->bcl->fsm_msg_cnt; 1435b1f7bdeSAllan Stephens } 1445b1f7bdeSAllan Stephens 1457a54d4a9SAllan Stephens static void bclink_update_last_sent(struct tipc_node *node, u32 seqno) 146b97bf3fdSPer Liden { 1477a54d4a9SAllan Stephens node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ? 1487a54d4a9SAllan Stephens seqno : node->bclink.last_sent; 149b97bf3fdSPer Liden } 150b97bf3fdSPer Liden 151b97bf3fdSPer Liden 1522c53040fSBen Hutchings /** 15301d83eddSAllan Stephens * tipc_bclink_retransmit_to - get most recent node to request retransmission 15401d83eddSAllan Stephens * 155d69afc90SYing Xue * Called with bclink_lock locked 15601d83eddSAllan Stephens */ 1571da46568SYing Xue struct tipc_node *tipc_bclink_retransmit_to(struct net *net) 15801d83eddSAllan Stephens { 1591da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 1601da46568SYing Xue 1611da46568SYing Xue return tn->bclink->retransmit_to; 16201d83eddSAllan Stephens } 16301d83eddSAllan Stephens 16401d83eddSAllan Stephens /** 165b97bf3fdSPer Liden * bclink_retransmit_pkt - retransmit broadcast packets 166b97bf3fdSPer Liden * @after: sequence number of last packet to *not* retransmit 167b97bf3fdSPer Liden * @to: sequence number of last packet to retransmit 168b97bf3fdSPer Liden * 169d69afc90SYing Xue * Called with bclink_lock locked 170b97bf3fdSPer Liden */ 1711da46568SYing Xue static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to) 172b97bf3fdSPer Liden { 17358dc55f2SYing Xue struct sk_buff *skb; 1741da46568SYing Xue struct tipc_link *bcl = tn->bcl; 175b97bf3fdSPer Liden 17658dc55f2SYing Xue skb_queue_walk(&bcl->outqueue, skb) { 177703068eeSJon Maloy if (more(buf_seqno(skb), after)) { 178703068eeSJon Maloy tipc_link_retransmit(bcl, skb, mod(to - after)); 17958dc55f2SYing Xue break; 18058dc55f2SYing Xue } 181703068eeSJon Maloy } 182b97bf3fdSPer Liden } 183b97bf3fdSPer Liden 184b97bf3fdSPer Liden /** 185908344cdSJon Maloy * tipc_bclink_wakeup_users - wake up pending users 186908344cdSJon Maloy * 187908344cdSJon Maloy * Called with no locks taken 188908344cdSJon Maloy */ 189f2f9800dSYing Xue void tipc_bclink_wakeup_users(struct net *net) 190908344cdSJon Maloy { 1911da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 1924988bb4aSErik Hugne struct sk_buff *skb; 1934988bb4aSErik Hugne 1941da46568SYing Xue while ((skb = skb_dequeue(&tn->bclink->link.waiting_sks))) 195f2f9800dSYing Xue tipc_sk_rcv(net, skb); 196908344cdSJon Maloy } 197908344cdSJon Maloy 198908344cdSJon Maloy /** 1994323add6SPer Liden * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets 200b97bf3fdSPer Liden * @n_ptr: node that sent acknowledgement info 201b97bf3fdSPer Liden * @acked: broadcast sequence # that has been acknowledged 202b97bf3fdSPer Liden * 203d69afc90SYing Xue * Node is locked, bclink_lock unlocked. 204b97bf3fdSPer Liden */ 2056c00055aSDavid S. Miller void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked) 206b97bf3fdSPer Liden { 20758dc55f2SYing Xue struct sk_buff *skb, *tmp; 208b97bf3fdSPer Liden struct sk_buff *next; 209b97bf3fdSPer Liden unsigned int released = 0; 2101da46568SYing Xue struct net *net = n_ptr->net; 2111da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 212b97bf3fdSPer Liden 2131da46568SYing Xue tipc_bclink_lock(net); 21436559591SAllan Stephens /* Bail out if tx queue is empty (no clean up is required) */ 2151da46568SYing Xue skb = skb_peek(&tn->bcl->outqueue); 21658dc55f2SYing Xue if (!skb) 21736559591SAllan Stephens goto exit; 21836559591SAllan Stephens 21936559591SAllan Stephens /* Determine which messages need to be acknowledged */ 22036559591SAllan Stephens if (acked == INVALID_LINK_SEQ) { 22136559591SAllan Stephens /* 22236559591SAllan Stephens * Contact with specified node has been lost, so need to 22336559591SAllan Stephens * acknowledge sent messages only (if other nodes still exist) 22436559591SAllan Stephens * or both sent and unsent messages (otherwise) 22536559591SAllan Stephens */ 2261da46568SYing Xue if (tn->bclink->bcast_nodes.count) 2271da46568SYing Xue acked = tn->bcl->fsm_msg_cnt; 22836559591SAllan Stephens else 2291da46568SYing Xue acked = tn->bcl->next_out_no; 23036559591SAllan Stephens } else { 23136559591SAllan Stephens /* 23236559591SAllan Stephens * Bail out if specified sequence number does not correspond 23336559591SAllan Stephens * to a message that has been sent and not yet acknowledged 23436559591SAllan Stephens */ 23558dc55f2SYing Xue if (less(acked, buf_seqno(skb)) || 2361da46568SYing Xue less(tn->bcl->fsm_msg_cnt, acked) || 23736559591SAllan Stephens less_eq(acked, n_ptr->bclink.acked)) 23836559591SAllan Stephens goto exit; 23936559591SAllan Stephens } 24036559591SAllan Stephens 24136559591SAllan Stephens /* Skip over packets that node has previously acknowledged */ 2421da46568SYing Xue skb_queue_walk(&tn->bcl->outqueue, skb) { 24358dc55f2SYing Xue if (more(buf_seqno(skb), n_ptr->bclink.acked)) 24458dc55f2SYing Xue break; 24558dc55f2SYing Xue } 246b97bf3fdSPer Liden 247b97bf3fdSPer Liden /* Update packets that node is now acknowledging */ 2481da46568SYing Xue skb_queue_walk_from_safe(&tn->bcl->outqueue, skb, tmp) { 24958dc55f2SYing Xue if (more(buf_seqno(skb), acked)) 25058dc55f2SYing Xue break; 251b97bf3fdSPer Liden 2521da46568SYing Xue next = tipc_skb_queue_next(&tn->bcl->outqueue, skb); 2531da46568SYing Xue if (skb != tn->bcl->next_out) { 25458dc55f2SYing Xue bcbuf_decr_acks(skb); 25558dc55f2SYing Xue } else { 25658dc55f2SYing Xue bcbuf_set_acks(skb, 0); 2571da46568SYing Xue tn->bcl->next_out = next; 2581da46568SYing Xue bclink_set_last_sent(net); 25910745cd5SAllan Stephens } 26010745cd5SAllan Stephens 26158dc55f2SYing Xue if (bcbuf_acks(skb) == 0) { 2621da46568SYing Xue __skb_unlink(skb, &tn->bcl->outqueue); 26358dc55f2SYing Xue kfree_skb(skb); 264b97bf3fdSPer Liden released = 1; 265b97bf3fdSPer Liden } 266b97bf3fdSPer Liden } 267b97bf3fdSPer Liden n_ptr->bclink.acked = acked; 268b97bf3fdSPer Liden 269b97bf3fdSPer Liden /* Try resolving broadcast link congestion, if necessary */ 2701da46568SYing Xue if (unlikely(tn->bcl->next_out)) { 2711da46568SYing Xue tipc_link_push_packets(tn->bcl); 2721da46568SYing Xue bclink_set_last_sent(net); 2735b1f7bdeSAllan Stephens } 2741da46568SYing Xue if (unlikely(released && !skb_queue_empty(&tn->bcl->waiting_sks))) 275908344cdSJon Maloy n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS; 276908344cdSJon Maloy 27736559591SAllan Stephens exit: 2781da46568SYing Xue tipc_bclink_unlock(net); 279b97bf3fdSPer Liden } 280b97bf3fdSPer Liden 2812c53040fSBen Hutchings /** 2827a54d4a9SAllan Stephens * tipc_bclink_update_link_state - update broadcast link state 283b97bf3fdSPer Liden * 2847216cd94SYing Xue * RCU and node lock set 285b97bf3fdSPer Liden */ 286c93d3baaSYing Xue void tipc_bclink_update_link_state(struct net *net, struct tipc_node *n_ptr, 287c93d3baaSYing Xue u32 last_sent) 288b97bf3fdSPer Liden { 289b97bf3fdSPer Liden struct sk_buff *buf; 290c93d3baaSYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 291b97bf3fdSPer Liden 2927a54d4a9SAllan Stephens /* Ignore "stale" link state info */ 2937a54d4a9SAllan Stephens if (less_eq(last_sent, n_ptr->bclink.last_in)) 294b97bf3fdSPer Liden return; 295b97bf3fdSPer Liden 2967a54d4a9SAllan Stephens /* Update link synchronization state; quit if in sync */ 2977a54d4a9SAllan Stephens bclink_update_last_sent(n_ptr, last_sent); 2987a54d4a9SAllan Stephens 2997a54d4a9SAllan Stephens if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in) 3007a54d4a9SAllan Stephens return; 3017a54d4a9SAllan Stephens 3027a54d4a9SAllan Stephens /* Update out-of-sync state; quit if loss is still unconfirmed */ 3037a54d4a9SAllan Stephens if ((++n_ptr->bclink.oos_state) == 1) { 3047a54d4a9SAllan Stephens if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2)) 3057a54d4a9SAllan Stephens return; 3067a54d4a9SAllan Stephens n_ptr->bclink.oos_state++; 3077a54d4a9SAllan Stephens } 3087a54d4a9SAllan Stephens 3097a54d4a9SAllan Stephens /* Don't NACK if one has been recently sent (or seen) */ 3107a54d4a9SAllan Stephens if (n_ptr->bclink.oos_state & 0x1) 3117a54d4a9SAllan Stephens return; 3127a54d4a9SAllan Stephens 3137a54d4a9SAllan Stephens /* Send NACK */ 31431e3c3f6Sstephen hemminger buf = tipc_buf_acquire(INT_H_SIZE); 315b97bf3fdSPer Liden if (buf) { 3167a54d4a9SAllan Stephens struct tipc_msg *msg = buf_msg(buf); 317bc6fecd4SYing Xue struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferred_queue); 318bc6fecd4SYing Xue u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent; 3197a54d4a9SAllan Stephens 320c68ca7b7SAllan Stephens tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG, 32175715217SAllan Stephens INT_H_SIZE, n_ptr->addr); 322bf781ecfSAllan Stephens msg_set_non_seq(msg, 1); 323c93d3baaSYing Xue msg_set_mc_netid(msg, tn->net_id); 3247a54d4a9SAllan Stephens msg_set_bcast_ack(msg, n_ptr->bclink.last_in); 3257a54d4a9SAllan Stephens msg_set_bcgap_after(msg, n_ptr->bclink.last_in); 326bc6fecd4SYing Xue msg_set_bcgap_to(msg, to); 327b97bf3fdSPer Liden 3281da46568SYing Xue tipc_bclink_lock(net); 3297f9f95d9SYing Xue tipc_bearer_send(net, MAX_BEARERS, buf, NULL); 3301da46568SYing Xue tn->bcl->stats.sent_nacks++; 3311da46568SYing Xue tipc_bclink_unlock(net); 3325f6d9123SAllan Stephens kfree_skb(buf); 333b97bf3fdSPer Liden 3347a54d4a9SAllan Stephens n_ptr->bclink.oos_state++; 3357a54d4a9SAllan Stephens } 3367a54d4a9SAllan Stephens } 3377a54d4a9SAllan Stephens 3382c53040fSBen Hutchings /** 3397a54d4a9SAllan Stephens * bclink_peek_nack - monitor retransmission requests sent by other nodes 340b97bf3fdSPer Liden * 3417a54d4a9SAllan Stephens * Delay any upcoming NACK by this node if another node has already 3427a54d4a9SAllan Stephens * requested the first message this node is going to ask for. 343b97bf3fdSPer Liden */ 344f2f9800dSYing Xue static void bclink_peek_nack(struct net *net, struct tipc_msg *msg) 345b97bf3fdSPer Liden { 346f2f9800dSYing Xue struct tipc_node *n_ptr = tipc_node_find(net, msg_destnode(msg)); 347b97bf3fdSPer Liden 3487a54d4a9SAllan Stephens if (unlikely(!n_ptr)) 349b97bf3fdSPer Liden return; 3507a54d4a9SAllan Stephens 3514323add6SPer Liden tipc_node_lock(n_ptr); 352b97bf3fdSPer Liden 353389dd9bcSYing Xue if (n_ptr->bclink.recv_permitted && 3547a54d4a9SAllan Stephens (n_ptr->bclink.last_in != n_ptr->bclink.last_sent) && 3557a54d4a9SAllan Stephens (n_ptr->bclink.last_in == msg_bcgap_after(msg))) 3567a54d4a9SAllan Stephens n_ptr->bclink.oos_state = 2; 357b97bf3fdSPer Liden 3584323add6SPer Liden tipc_node_unlock(n_ptr); 359b97bf3fdSPer Liden } 360b97bf3fdSPer Liden 3619fbfb8b1SJon Paul Maloy /* tipc_bclink_xmit - broadcast buffer chain to all nodes in cluster 362078bec82SJon Paul Maloy * and to identified node local sockets 363f2f9800dSYing Xue * @net: the applicable net namespace 364a6ca1094SYing Xue * @list: chain of buffers containing message 365078bec82SJon Paul Maloy * Consumes the buffer chain, except when returning -ELINKCONG 366078bec82SJon Paul Maloy * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE 367078bec82SJon Paul Maloy */ 368f2f9800dSYing Xue int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list) 369078bec82SJon Paul Maloy { 3701da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 3711da46568SYing Xue struct tipc_link *bcl = tn->bcl; 3721da46568SYing Xue struct tipc_bclink *bclink = tn->bclink; 373078bec82SJon Paul Maloy int rc = 0; 374078bec82SJon Paul Maloy int bc = 0; 375a6ca1094SYing Xue struct sk_buff *skb; 376078bec82SJon Paul Maloy 377078bec82SJon Paul Maloy /* Prepare clone of message for local node */ 378a6ca1094SYing Xue skb = tipc_msg_reassemble(list); 379a6ca1094SYing Xue if (unlikely(!skb)) { 380a6ca1094SYing Xue __skb_queue_purge(list); 381078bec82SJon Paul Maloy return -EHOSTUNREACH; 382078bec82SJon Paul Maloy } 383078bec82SJon Paul Maloy 384078bec82SJon Paul Maloy /* Broadcast to all other nodes */ 385078bec82SJon Paul Maloy if (likely(bclink)) { 3861da46568SYing Xue tipc_bclink_lock(net); 387078bec82SJon Paul Maloy if (likely(bclink->bcast_nodes.count)) { 3887f9f95d9SYing Xue rc = __tipc_link_xmit(net, bcl, list); 389078bec82SJon Paul Maloy if (likely(!rc)) { 39058dc55f2SYing Xue u32 len = skb_queue_len(&bcl->outqueue); 39158dc55f2SYing Xue 3921da46568SYing Xue bclink_set_last_sent(net); 393078bec82SJon Paul Maloy bcl->stats.queue_sz_counts++; 39458dc55f2SYing Xue bcl->stats.accu_queue_sz += len; 395078bec82SJon Paul Maloy } 396078bec82SJon Paul Maloy bc = 1; 397078bec82SJon Paul Maloy } 3981da46568SYing Xue tipc_bclink_unlock(net); 399078bec82SJon Paul Maloy } 400078bec82SJon Paul Maloy 401078bec82SJon Paul Maloy if (unlikely(!bc)) 402a6ca1094SYing Xue __skb_queue_purge(list); 403078bec82SJon Paul Maloy 404078bec82SJon Paul Maloy /* Deliver message clone */ 405078bec82SJon Paul Maloy if (likely(!rc)) 406f2f9800dSYing Xue tipc_sk_mcast_rcv(net, skb); 407078bec82SJon Paul Maloy else 408a6ca1094SYing Xue kfree_skb(skb); 409078bec82SJon Paul Maloy 410078bec82SJon Paul Maloy return rc; 411078bec82SJon Paul Maloy } 412078bec82SJon Paul Maloy 4132c53040fSBen Hutchings /** 41463e7f1acSAllan Stephens * bclink_accept_pkt - accept an incoming, in-sequence broadcast packet 41563e7f1acSAllan Stephens * 416d69afc90SYing Xue * Called with both sending node's lock and bclink_lock taken. 41763e7f1acSAllan Stephens */ 41863e7f1acSAllan Stephens static void bclink_accept_pkt(struct tipc_node *node, u32 seqno) 41963e7f1acSAllan Stephens { 4201da46568SYing Xue struct tipc_net *tn = net_generic(node->net, tipc_net_id); 4211da46568SYing Xue 42263e7f1acSAllan Stephens bclink_update_last_sent(node, seqno); 42363e7f1acSAllan Stephens node->bclink.last_in = seqno; 42463e7f1acSAllan Stephens node->bclink.oos_state = 0; 4251da46568SYing Xue tn->bcl->stats.recv_info++; 42663e7f1acSAllan Stephens 42763e7f1acSAllan Stephens /* 42863e7f1acSAllan Stephens * Unicast an ACK periodically, ensuring that 42963e7f1acSAllan Stephens * all nodes in the cluster don't ACK at the same time 43063e7f1acSAllan Stephens */ 43163e7f1acSAllan Stephens if (((seqno - tipc_own_addr) % TIPC_MIN_LINK_WIN) == 0) { 432247f0f3cSYing Xue tipc_link_proto_xmit(node->active_links[node->addr & 1], 43363e7f1acSAllan Stephens STATE_MSG, 0, 0, 0, 0, 0); 4341da46568SYing Xue tn->bcl->stats.sent_acks++; 43563e7f1acSAllan Stephens } 43663e7f1acSAllan Stephens } 43763e7f1acSAllan Stephens 4382c53040fSBen Hutchings /** 439247f0f3cSYing Xue * tipc_bclink_rcv - receive a broadcast packet, and deliver upwards 440b97bf3fdSPer Liden * 4417216cd94SYing Xue * RCU is locked, no other locks set 442b97bf3fdSPer Liden */ 443c93d3baaSYing Xue void tipc_bclink_rcv(struct net *net, struct sk_buff *buf) 444b97bf3fdSPer Liden { 445c93d3baaSYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 4461da46568SYing Xue struct tipc_link *bcl = tn->bcl; 447b97bf3fdSPer Liden struct tipc_msg *msg = buf_msg(buf); 4485d3c488dSAllan Stephens struct tipc_node *node; 449b97bf3fdSPer Liden u32 next_in; 450b97bf3fdSPer Liden u32 seqno; 4510abd8ff2SJon Paul Maloy int deferred = 0; 452b97bf3fdSPer Liden 4535d3c488dSAllan Stephens /* Screen out unwanted broadcast messages */ 454c93d3baaSYing Xue if (msg_mc_netid(msg) != tn->net_id) 4555d3c488dSAllan Stephens goto exit; 4565d3c488dSAllan Stephens 457f2f9800dSYing Xue node = tipc_node_find(net, msg_prevnode(msg)); 4585d3c488dSAllan Stephens if (unlikely(!node)) 4595d3c488dSAllan Stephens goto exit; 4605d3c488dSAllan Stephens 4615d3c488dSAllan Stephens tipc_node_lock(node); 462389dd9bcSYing Xue if (unlikely(!node->bclink.recv_permitted)) 4635d3c488dSAllan Stephens goto unlock; 464b97bf3fdSPer Liden 4658a275a6aSAllan Stephens /* Handle broadcast protocol message */ 466b97bf3fdSPer Liden if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) { 4679f6bdcd4SAllan Stephens if (msg_type(msg) != STATE_MSG) 4689f6bdcd4SAllan Stephens goto unlock; 469b97bf3fdSPer Liden if (msg_destnode(msg) == tipc_own_addr) { 4704323add6SPer Liden tipc_bclink_acknowledge(node, msg_bcast_ack(msg)); 4714323add6SPer Liden tipc_node_unlock(node); 4721da46568SYing Xue tipc_bclink_lock(net); 473b97bf3fdSPer Liden bcl->stats.recv_nacks++; 4741da46568SYing Xue tn->bclink->retransmit_to = node; 4751da46568SYing Xue bclink_retransmit_pkt(tn, msg_bcgap_after(msg), 476b97bf3fdSPer Liden msg_bcgap_to(msg)); 4771da46568SYing Xue tipc_bclink_unlock(net); 478b97bf3fdSPer Liden } else { 4795d3c488dSAllan Stephens tipc_node_unlock(node); 480f2f9800dSYing Xue bclink_peek_nack(net, msg); 481b97bf3fdSPer Liden } 4825d3c488dSAllan Stephens goto exit; 483b97bf3fdSPer Liden } 484b97bf3fdSPer Liden 4855d3c488dSAllan Stephens /* Handle in-sequence broadcast message */ 486b97bf3fdSPer Liden seqno = msg_seqno(msg); 4878a275a6aSAllan Stephens next_in = mod(node->bclink.last_in + 1); 488b97bf3fdSPer Liden 489b97bf3fdSPer Liden if (likely(seqno == next_in)) { 4908a275a6aSAllan Stephens receive: 4917a54d4a9SAllan Stephens /* Deliver message to destination */ 492b97bf3fdSPer Liden if (likely(msg_isdata(msg))) { 4931da46568SYing Xue tipc_bclink_lock(net); 49463e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 4951da46568SYing Xue tipc_bclink_unlock(net); 4964323add6SPer Liden tipc_node_unlock(node); 4979f6bdcd4SAllan Stephens if (likely(msg_mcast(msg))) 498f2f9800dSYing Xue tipc_sk_mcast_rcv(net, buf); 4999f6bdcd4SAllan Stephens else 5005f6d9123SAllan Stephens kfree_skb(buf); 501b97bf3fdSPer Liden } else if (msg_user(msg) == MSG_BUNDLER) { 5021da46568SYing Xue tipc_bclink_lock(net); 50363e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 504b97bf3fdSPer Liden bcl->stats.recv_bundles++; 505b97bf3fdSPer Liden bcl->stats.recv_bundled += msg_msgcnt(msg); 5061da46568SYing Xue tipc_bclink_unlock(net); 5074323add6SPer Liden tipc_node_unlock(node); 508f2f9800dSYing Xue tipc_link_bundle_rcv(net, buf); 509b97bf3fdSPer Liden } else if (msg_user(msg) == MSG_FRAGMENTER) { 51037e22164SJon Paul Maloy tipc_buf_append(&node->bclink.reasm_buf, &buf); 51137e22164SJon Paul Maloy if (unlikely(!buf && !node->bclink.reasm_buf)) 51263e7f1acSAllan Stephens goto unlock; 5131da46568SYing Xue tipc_bclink_lock(net); 51463e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 515b97bf3fdSPer Liden bcl->stats.recv_fragments++; 51637e22164SJon Paul Maloy if (buf) { 517b97bf3fdSPer Liden bcl->stats.recv_fragmented++; 51840ba3cdfSErik Hugne msg = buf_msg(buf); 5191da46568SYing Xue tipc_bclink_unlock(net); 520528f6f4bSErik Hugne goto receive; 521528f6f4bSErik Hugne } 5221da46568SYing Xue tipc_bclink_unlock(net); 5234323add6SPer Liden tipc_node_unlock(node); 5249f6bdcd4SAllan Stephens } else if (msg_user(msg) == NAME_DISTRIBUTOR) { 5251da46568SYing Xue tipc_bclink_lock(net); 52663e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 5271da46568SYing Xue tipc_bclink_unlock(net); 5289f6bdcd4SAllan Stephens tipc_node_unlock(node); 529f2f9800dSYing Xue tipc_named_rcv(net, buf); 530b97bf3fdSPer Liden } else { 5311da46568SYing Xue tipc_bclink_lock(net); 53263e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 5331da46568SYing Xue tipc_bclink_unlock(net); 5344323add6SPer Liden tipc_node_unlock(node); 5355f6d9123SAllan Stephens kfree_skb(buf); 536b97bf3fdSPer Liden } 5375d3c488dSAllan Stephens buf = NULL; 5388a275a6aSAllan Stephens 5398a275a6aSAllan Stephens /* Determine new synchronization state */ 5404323add6SPer Liden tipc_node_lock(node); 5418a275a6aSAllan Stephens if (unlikely(!tipc_node_is_up(node))) 5428a275a6aSAllan Stephens goto unlock; 5438a275a6aSAllan Stephens 5447a54d4a9SAllan Stephens if (node->bclink.last_in == node->bclink.last_sent) 5458a275a6aSAllan Stephens goto unlock; 5468a275a6aSAllan Stephens 547bc6fecd4SYing Xue if (skb_queue_empty(&node->bclink.deferred_queue)) { 5487a54d4a9SAllan Stephens node->bclink.oos_state = 1; 5497a54d4a9SAllan Stephens goto unlock; 5507a54d4a9SAllan Stephens } 5517a54d4a9SAllan Stephens 552bc6fecd4SYing Xue msg = buf_msg(skb_peek(&node->bclink.deferred_queue)); 5538a275a6aSAllan Stephens seqno = msg_seqno(msg); 5548a275a6aSAllan Stephens next_in = mod(next_in + 1); 5558a275a6aSAllan Stephens if (seqno != next_in) 5568a275a6aSAllan Stephens goto unlock; 5578a275a6aSAllan Stephens 5588a275a6aSAllan Stephens /* Take in-sequence message from deferred queue & deliver it */ 559bc6fecd4SYing Xue buf = __skb_dequeue(&node->bclink.deferred_queue); 560b97bf3fdSPer Liden goto receive; 561b97bf3fdSPer Liden } 5628a275a6aSAllan Stephens 5638a275a6aSAllan Stephens /* Handle out-of-sequence broadcast message */ 5648a275a6aSAllan Stephens if (less(next_in, seqno)) { 565bc6fecd4SYing Xue deferred = tipc_link_defer_pkt(&node->bclink.deferred_queue, 5668a275a6aSAllan Stephens buf); 5677a54d4a9SAllan Stephens bclink_update_last_sent(node, seqno); 5685d3c488dSAllan Stephens buf = NULL; 5690abd8ff2SJon Paul Maloy } 5708a275a6aSAllan Stephens 5711da46568SYing Xue tipc_bclink_lock(net); 572b98158e3SAllan Stephens 5738a275a6aSAllan Stephens if (deferred) 5748a275a6aSAllan Stephens bcl->stats.deferred_recv++; 5750232c5a5SAllan Stephens else 5760232c5a5SAllan Stephens bcl->stats.duplicates++; 5778a275a6aSAllan Stephens 5781da46568SYing Xue tipc_bclink_unlock(net); 579b98158e3SAllan Stephens 5805d3c488dSAllan Stephens unlock: 5814323add6SPer Liden tipc_node_unlock(node); 5825d3c488dSAllan Stephens exit: 5835f6d9123SAllan Stephens kfree_skb(buf); 584b97bf3fdSPer Liden } 585b97bf3fdSPer Liden 5866c00055aSDavid S. Miller u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr) 587b97bf3fdSPer Liden { 588389dd9bcSYing Xue return (n_ptr->bclink.recv_permitted && 5891da46568SYing Xue (tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked)); 590b97bf3fdSPer Liden } 591b97bf3fdSPer Liden 592b97bf3fdSPer Liden 593b97bf3fdSPer Liden /** 5944323add6SPer Liden * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer 595b97bf3fdSPer Liden * 5962ff9f924SAllan Stephens * Send packet over as many bearers as necessary to reach all nodes 5972ff9f924SAllan Stephens * that have joined the broadcast link. 598b97bf3fdSPer Liden * 5992ff9f924SAllan Stephens * Returns 0 (packet sent successfully) under all circumstances, 6002ff9f924SAllan Stephens * since the broadcast link's pseudo-bearer never blocks 601b97bf3fdSPer Liden */ 6021da46568SYing Xue static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf, 6031da46568SYing Xue struct tipc_bearer *unused1, 604b97bf3fdSPer Liden struct tipc_media_addr *unused2) 605b97bf3fdSPer Liden { 606b97bf3fdSPer Liden int bp_index; 6076f92ee54SJon Paul Maloy struct tipc_msg *msg = buf_msg(buf); 608c93d3baaSYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 6091da46568SYing Xue struct tipc_bcbearer *bcbearer = tn->bcbearer; 6101da46568SYing Xue struct tipc_bclink *bclink = tn->bclink; 611b97bf3fdSPer Liden 612e6160710SGerlando Falauto /* Prepare broadcast link message for reliable transmission, 6132ff9f924SAllan Stephens * if first time trying to send it; 6142ff9f924SAllan Stephens * preparation is skipped for broadcast link protocol messages 6152ff9f924SAllan Stephens * since they are sent in an unreliable manner and don't need it 6162ff9f924SAllan Stephens */ 617b97bf3fdSPer Liden if (likely(!msg_non_seq(buf_msg(buf)))) { 618cd3decdfSAllan Stephens bcbuf_set_acks(buf, bclink->bcast_nodes.count); 61940aecb1bSAllan Stephens msg_set_non_seq(msg, 1); 620c93d3baaSYing Xue msg_set_mc_netid(msg, tn->net_id); 6211da46568SYing Xue tn->bcl->stats.sent_info++; 6225e726900SAllan Stephens 623cd3decdfSAllan Stephens if (WARN_ON(!bclink->bcast_nodes.count)) { 6245e726900SAllan Stephens dump_stack(); 6255e726900SAllan Stephens return 0; 6265e726900SAllan Stephens } 627b97bf3fdSPer Liden } 628b97bf3fdSPer Liden 629b97bf3fdSPer Liden /* Send buffer over bearers until all targets reached */ 630cd3decdfSAllan Stephens bcbearer->remains = bclink->bcast_nodes; 631b97bf3fdSPer Liden 632b97bf3fdSPer Liden for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { 6332d627b92SAllan Stephens struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary; 6342d627b92SAllan Stephens struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary; 6356f92ee54SJon Paul Maloy struct tipc_bearer *bp[2] = {p, s}; 6366f92ee54SJon Paul Maloy struct tipc_bearer *b = bp[msg_link_selector(msg)]; 637488fc9afSGerlando Falauto struct sk_buff *tbuf; 638b97bf3fdSPer Liden 639b97bf3fdSPer Liden if (!p) 640e6160710SGerlando Falauto break; /* No more bearers to try */ 6416f92ee54SJon Paul Maloy if (!b) 6426f92ee54SJon Paul Maloy b = p; 64377861d9cSGerlando Falauto tipc_nmap_diff(&bcbearer->remains, &b->nodes, 644e6160710SGerlando Falauto &bcbearer->remains_new); 64565f51ef0SAllan Stephens if (bcbearer->remains_new.count == bcbearer->remains.count) 646e6160710SGerlando Falauto continue; /* Nothing added by bearer pair */ 647b97bf3fdSPer Liden 648488fc9afSGerlando Falauto if (bp_index == 0) { 649488fc9afSGerlando Falauto /* Use original buffer for first bearer */ 6507f9f95d9SYing Xue tipc_bearer_send(net, b->identity, buf, &b->bcast_addr); 651488fc9afSGerlando Falauto } else { 652488fc9afSGerlando Falauto /* Avoid concurrent buffer access */ 653bad93e9dSOctavian Purdila tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC); 654488fc9afSGerlando Falauto if (!tbuf) 655488fc9afSGerlando Falauto break; 6567f9f95d9SYing Xue tipc_bearer_send(net, b->identity, tbuf, 6577f9f95d9SYing Xue &b->bcast_addr); 658488fc9afSGerlando Falauto kfree_skb(tbuf); /* Bearer keeps a clone */ 659488fc9afSGerlando Falauto } 66065f51ef0SAllan Stephens if (bcbearer->remains_new.count == 0) 661e6160710SGerlando Falauto break; /* All targets reached */ 662b97bf3fdSPer Liden 66365f51ef0SAllan Stephens bcbearer->remains = bcbearer->remains_new; 664b97bf3fdSPer Liden } 665b97bf3fdSPer Liden 6662ff9f924SAllan Stephens return 0; 667b97bf3fdSPer Liden } 668b97bf3fdSPer Liden 669b97bf3fdSPer Liden /** 6704323add6SPer Liden * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer 671b97bf3fdSPer Liden */ 6727f9f95d9SYing Xue void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr, 6737f9f95d9SYing Xue u32 node, bool action) 674b97bf3fdSPer Liden { 6757f9f95d9SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 6761da46568SYing Xue struct tipc_bcbearer *bcbearer = tn->bcbearer; 6777f9ab6acSPaul Gortmaker struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp; 6787f9ab6acSPaul Gortmaker struct tipc_bcbearer_pair *bp_curr; 679f8322dfcSYing Xue struct tipc_bearer *b; 680b97bf3fdSPer Liden int b_index; 681b97bf3fdSPer Liden int pri; 682b97bf3fdSPer Liden 6831da46568SYing Xue tipc_bclink_lock(net); 684b97bf3fdSPer Liden 68528dd9418SYing Xue if (action) 68628dd9418SYing Xue tipc_nmap_add(nm_ptr, node); 68728dd9418SYing Xue else 68828dd9418SYing Xue tipc_nmap_remove(nm_ptr, node); 68928dd9418SYing Xue 690b97bf3fdSPer Liden /* Group bearers by priority (can assume max of two per priority) */ 691b97bf3fdSPer Liden memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); 692b97bf3fdSPer Liden 693f8322dfcSYing Xue rcu_read_lock(); 694b97bf3fdSPer Liden for (b_index = 0; b_index < MAX_BEARERS; b_index++) { 6957f9f95d9SYing Xue b = rcu_dereference_rtnl(tn->bearer_list[b_index]); 696f47de12bSYing Xue if (!b || !b->nodes.count) 697b97bf3fdSPer Liden continue; 698b97bf3fdSPer Liden 699b97bf3fdSPer Liden if (!bp_temp[b->priority].primary) 700b97bf3fdSPer Liden bp_temp[b->priority].primary = b; 701b97bf3fdSPer Liden else 702b97bf3fdSPer Liden bp_temp[b->priority].secondary = b; 703b97bf3fdSPer Liden } 704f8322dfcSYing Xue rcu_read_unlock(); 705b97bf3fdSPer Liden 706b97bf3fdSPer Liden /* Create array of bearer pairs for broadcasting */ 707b97bf3fdSPer Liden bp_curr = bcbearer->bpairs; 708b97bf3fdSPer Liden memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs)); 709b97bf3fdSPer Liden 71016cb4b33SPer Liden for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) { 711b97bf3fdSPer Liden 712b97bf3fdSPer Liden if (!bp_temp[pri].primary) 713b97bf3fdSPer Liden continue; 714b97bf3fdSPer Liden 715b97bf3fdSPer Liden bp_curr->primary = bp_temp[pri].primary; 716b97bf3fdSPer Liden 717b97bf3fdSPer Liden if (bp_temp[pri].secondary) { 7184323add6SPer Liden if (tipc_nmap_equal(&bp_temp[pri].primary->nodes, 719b97bf3fdSPer Liden &bp_temp[pri].secondary->nodes)) { 720b97bf3fdSPer Liden bp_curr->secondary = bp_temp[pri].secondary; 721b97bf3fdSPer Liden } else { 722b97bf3fdSPer Liden bp_curr++; 723b97bf3fdSPer Liden bp_curr->primary = bp_temp[pri].secondary; 724b97bf3fdSPer Liden } 725b97bf3fdSPer Liden } 726b97bf3fdSPer Liden 727b97bf3fdSPer Liden bp_curr++; 728b97bf3fdSPer Liden } 729b97bf3fdSPer Liden 7301da46568SYing Xue tipc_bclink_unlock(net); 731b97bf3fdSPer Liden } 732b97bf3fdSPer Liden 733d8182804SRichard Alpe static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb, 734d8182804SRichard Alpe struct tipc_stats *stats) 7357be57fc6SRichard Alpe { 7367be57fc6SRichard Alpe int i; 7377be57fc6SRichard Alpe struct nlattr *nest; 7387be57fc6SRichard Alpe 7397be57fc6SRichard Alpe struct nla_map { 7407be57fc6SRichard Alpe __u32 key; 7417be57fc6SRichard Alpe __u32 val; 7427be57fc6SRichard Alpe }; 7437be57fc6SRichard Alpe 7447be57fc6SRichard Alpe struct nla_map map[] = { 7457be57fc6SRichard Alpe {TIPC_NLA_STATS_RX_INFO, stats->recv_info}, 7467be57fc6SRichard Alpe {TIPC_NLA_STATS_RX_FRAGMENTS, stats->recv_fragments}, 7477be57fc6SRichard Alpe {TIPC_NLA_STATS_RX_FRAGMENTED, stats->recv_fragmented}, 7487be57fc6SRichard Alpe {TIPC_NLA_STATS_RX_BUNDLES, stats->recv_bundles}, 7497be57fc6SRichard Alpe {TIPC_NLA_STATS_RX_BUNDLED, stats->recv_bundled}, 7507be57fc6SRichard Alpe {TIPC_NLA_STATS_TX_INFO, stats->sent_info}, 7517be57fc6SRichard Alpe {TIPC_NLA_STATS_TX_FRAGMENTS, stats->sent_fragments}, 7527be57fc6SRichard Alpe {TIPC_NLA_STATS_TX_FRAGMENTED, stats->sent_fragmented}, 7537be57fc6SRichard Alpe {TIPC_NLA_STATS_TX_BUNDLES, stats->sent_bundles}, 7547be57fc6SRichard Alpe {TIPC_NLA_STATS_TX_BUNDLED, stats->sent_bundled}, 7557be57fc6SRichard Alpe {TIPC_NLA_STATS_RX_NACKS, stats->recv_nacks}, 7567be57fc6SRichard Alpe {TIPC_NLA_STATS_RX_DEFERRED, stats->deferred_recv}, 7577be57fc6SRichard Alpe {TIPC_NLA_STATS_TX_NACKS, stats->sent_nacks}, 7587be57fc6SRichard Alpe {TIPC_NLA_STATS_TX_ACKS, stats->sent_acks}, 7597be57fc6SRichard Alpe {TIPC_NLA_STATS_RETRANSMITTED, stats->retransmitted}, 7607be57fc6SRichard Alpe {TIPC_NLA_STATS_DUPLICATES, stats->duplicates}, 7617be57fc6SRichard Alpe {TIPC_NLA_STATS_LINK_CONGS, stats->link_congs}, 7627be57fc6SRichard Alpe {TIPC_NLA_STATS_MAX_QUEUE, stats->max_queue_sz}, 7637be57fc6SRichard Alpe {TIPC_NLA_STATS_AVG_QUEUE, stats->queue_sz_counts ? 7647be57fc6SRichard Alpe (stats->accu_queue_sz / stats->queue_sz_counts) : 0} 7657be57fc6SRichard Alpe }; 7667be57fc6SRichard Alpe 7677be57fc6SRichard Alpe nest = nla_nest_start(skb, TIPC_NLA_LINK_STATS); 7687be57fc6SRichard Alpe if (!nest) 7697be57fc6SRichard Alpe return -EMSGSIZE; 7707be57fc6SRichard Alpe 7717be57fc6SRichard Alpe for (i = 0; i < ARRAY_SIZE(map); i++) 7727be57fc6SRichard Alpe if (nla_put_u32(skb, map[i].key, map[i].val)) 7737be57fc6SRichard Alpe goto msg_full; 7747be57fc6SRichard Alpe 7757be57fc6SRichard Alpe nla_nest_end(skb, nest); 7767be57fc6SRichard Alpe 7777be57fc6SRichard Alpe return 0; 7787be57fc6SRichard Alpe msg_full: 7797be57fc6SRichard Alpe nla_nest_cancel(skb, nest); 7807be57fc6SRichard Alpe 7817be57fc6SRichard Alpe return -EMSGSIZE; 7827be57fc6SRichard Alpe } 7837be57fc6SRichard Alpe 7841da46568SYing Xue int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg) 7857be57fc6SRichard Alpe { 7867be57fc6SRichard Alpe int err; 7877be57fc6SRichard Alpe void *hdr; 7887be57fc6SRichard Alpe struct nlattr *attrs; 7897be57fc6SRichard Alpe struct nlattr *prop; 7901da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 7911da46568SYing Xue struct tipc_link *bcl = tn->bcl; 7927be57fc6SRichard Alpe 7937be57fc6SRichard Alpe if (!bcl) 7947be57fc6SRichard Alpe return 0; 7957be57fc6SRichard Alpe 7961da46568SYing Xue tipc_bclink_lock(net); 7977be57fc6SRichard Alpe 7987be57fc6SRichard Alpe hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family, 7997be57fc6SRichard Alpe NLM_F_MULTI, TIPC_NL_LINK_GET); 8007be57fc6SRichard Alpe if (!hdr) 8017be57fc6SRichard Alpe return -EMSGSIZE; 8027be57fc6SRichard Alpe 8037be57fc6SRichard Alpe attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK); 8047be57fc6SRichard Alpe if (!attrs) 8057be57fc6SRichard Alpe goto msg_full; 8067be57fc6SRichard Alpe 8077be57fc6SRichard Alpe /* The broadcast link is always up */ 8087be57fc6SRichard Alpe if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP)) 8097be57fc6SRichard Alpe goto attr_msg_full; 8107be57fc6SRichard Alpe 8117be57fc6SRichard Alpe if (nla_put_flag(msg->skb, TIPC_NLA_LINK_BROADCAST)) 8127be57fc6SRichard Alpe goto attr_msg_full; 8137be57fc6SRichard Alpe if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name)) 8147be57fc6SRichard Alpe goto attr_msg_full; 8157be57fc6SRichard Alpe if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, bcl->next_in_no)) 8167be57fc6SRichard Alpe goto attr_msg_full; 8177be57fc6SRichard Alpe if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, bcl->next_out_no)) 8187be57fc6SRichard Alpe goto attr_msg_full; 8197be57fc6SRichard Alpe 8207be57fc6SRichard Alpe prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP); 8217be57fc6SRichard Alpe if (!prop) 8227be57fc6SRichard Alpe goto attr_msg_full; 8237be57fc6SRichard Alpe if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->queue_limit[0])) 8247be57fc6SRichard Alpe goto prop_msg_full; 8257be57fc6SRichard Alpe nla_nest_end(msg->skb, prop); 8267be57fc6SRichard Alpe 8277be57fc6SRichard Alpe err = __tipc_nl_add_bc_link_stat(msg->skb, &bcl->stats); 8287be57fc6SRichard Alpe if (err) 8297be57fc6SRichard Alpe goto attr_msg_full; 8307be57fc6SRichard Alpe 8311da46568SYing Xue tipc_bclink_unlock(net); 8327be57fc6SRichard Alpe nla_nest_end(msg->skb, attrs); 8337be57fc6SRichard Alpe genlmsg_end(msg->skb, hdr); 8347be57fc6SRichard Alpe 8357be57fc6SRichard Alpe return 0; 8367be57fc6SRichard Alpe 8377be57fc6SRichard Alpe prop_msg_full: 8387be57fc6SRichard Alpe nla_nest_cancel(msg->skb, prop); 8397be57fc6SRichard Alpe attr_msg_full: 8407be57fc6SRichard Alpe nla_nest_cancel(msg->skb, attrs); 8417be57fc6SRichard Alpe msg_full: 8421da46568SYing Xue tipc_bclink_unlock(net); 8437be57fc6SRichard Alpe genlmsg_cancel(msg->skb, hdr); 8447be57fc6SRichard Alpe 8457be57fc6SRichard Alpe return -EMSGSIZE; 8467be57fc6SRichard Alpe } 847b97bf3fdSPer Liden 8481da46568SYing Xue int tipc_bclink_stats(struct net *net, char *buf, const u32 buf_size) 849b97bf3fdSPer Liden { 850dc1aed37SErik Hugne int ret; 851dc1aed37SErik Hugne struct tipc_stats *s; 8521da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 8531da46568SYing Xue struct tipc_link *bcl = tn->bcl; 854b97bf3fdSPer Liden 855b97bf3fdSPer Liden if (!bcl) 856b97bf3fdSPer Liden return 0; 857b97bf3fdSPer Liden 8581da46568SYing Xue tipc_bclink_lock(net); 859b97bf3fdSPer Liden 860dc1aed37SErik Hugne s = &bcl->stats; 861dc1aed37SErik Hugne 862dc1aed37SErik Hugne ret = tipc_snprintf(buf, buf_size, "Link <%s>\n" 863b97bf3fdSPer Liden " Window:%u packets\n", 864b97bf3fdSPer Liden bcl->name, bcl->queue_limit[0]); 865dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 866dc1aed37SErik Hugne " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 867dc1aed37SErik Hugne s->recv_info, s->recv_fragments, 868dc1aed37SErik Hugne s->recv_fragmented, s->recv_bundles, 869dc1aed37SErik Hugne s->recv_bundled); 870dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 871dc1aed37SErik Hugne " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 872dc1aed37SErik Hugne s->sent_info, s->sent_fragments, 873dc1aed37SErik Hugne s->sent_fragmented, s->sent_bundles, 874dc1aed37SErik Hugne s->sent_bundled); 875dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 876dc1aed37SErik Hugne " RX naks:%u defs:%u dups:%u\n", 877dc1aed37SErik Hugne s->recv_nacks, s->deferred_recv, s->duplicates); 878dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 879dc1aed37SErik Hugne " TX naks:%u acks:%u dups:%u\n", 880dc1aed37SErik Hugne s->sent_nacks, s->sent_acks, s->retransmitted); 881dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 8823c294cb3SYing Xue " Congestion link:%u Send queue max:%u avg:%u\n", 8833c294cb3SYing Xue s->link_congs, s->max_queue_sz, 884dc1aed37SErik Hugne s->queue_sz_counts ? 885dc1aed37SErik Hugne (s->accu_queue_sz / s->queue_sz_counts) : 0); 886b97bf3fdSPer Liden 8871da46568SYing Xue tipc_bclink_unlock(net); 888dc1aed37SErik Hugne return ret; 889b97bf3fdSPer Liden } 890b97bf3fdSPer Liden 8911da46568SYing Xue int tipc_bclink_reset_stats(struct net *net) 892b97bf3fdSPer Liden { 8931da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 8941da46568SYing Xue struct tipc_link *bcl = tn->bcl; 8951da46568SYing Xue 896b97bf3fdSPer Liden if (!bcl) 897b97bf3fdSPer Liden return -ENOPROTOOPT; 898b97bf3fdSPer Liden 8991da46568SYing Xue tipc_bclink_lock(net); 900b97bf3fdSPer Liden memset(&bcl->stats, 0, sizeof(bcl->stats)); 9011da46568SYing Xue tipc_bclink_unlock(net); 9020e35fd5eSAllan Stephens return 0; 903b97bf3fdSPer Liden } 904b97bf3fdSPer Liden 9051da46568SYing Xue int tipc_bclink_set_queue_limits(struct net *net, u32 limit) 906b97bf3fdSPer Liden { 9071da46568SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 9081da46568SYing Xue struct tipc_link *bcl = tn->bcl; 9091da46568SYing Xue 910b97bf3fdSPer Liden if (!bcl) 911b97bf3fdSPer Liden return -ENOPROTOOPT; 912b97bf3fdSPer Liden if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN)) 913b97bf3fdSPer Liden return -EINVAL; 914b97bf3fdSPer Liden 9151da46568SYing Xue tipc_bclink_lock(net); 9164323add6SPer Liden tipc_link_set_queue_limits(bcl, limit); 9171da46568SYing Xue tipc_bclink_unlock(net); 9180e35fd5eSAllan Stephens return 0; 919b97bf3fdSPer Liden } 920b97bf3fdSPer Liden 9217f9f95d9SYing Xue int tipc_bclink_init(struct net *net) 922b97bf3fdSPer Liden { 9237f9f95d9SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 9241da46568SYing Xue struct tipc_bcbearer *bcbearer; 9251da46568SYing Xue struct tipc_bclink *bclink; 9261da46568SYing Xue struct tipc_link *bcl; 9277f9f95d9SYing Xue 928eb8b00f5SYing Xue bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); 929eb8b00f5SYing Xue if (!bcbearer) 930eb8b00f5SYing Xue return -ENOMEM; 931eb8b00f5SYing Xue 932eb8b00f5SYing Xue bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); 933eb8b00f5SYing Xue if (!bclink) { 934eb8b00f5SYing Xue kfree(bcbearer); 935eb8b00f5SYing Xue return -ENOMEM; 936eb8b00f5SYing Xue } 937eb8b00f5SYing Xue 938eb8b00f5SYing Xue bcl = &bclink->link; 939b97bf3fdSPer Liden bcbearer->bearer.media = &bcbearer->media; 9404323add6SPer Liden bcbearer->media.send_msg = tipc_bcbearer_send; 9412e2d9be8SAllan Stephens sprintf(bcbearer->media.name, "tipc-broadcast"); 942b97bf3fdSPer Liden 943d69afc90SYing Xue spin_lock_init(&bclink->lock); 94458dc55f2SYing Xue __skb_queue_head_init(&bcl->outqueue); 945bc6fecd4SYing Xue __skb_queue_head_init(&bcl->deferred_queue); 9464988bb4aSErik Hugne skb_queue_head_init(&bcl->waiting_sks); 947b97bf3fdSPer Liden bcl->next_out_no = 1; 94834af946aSIngo Molnar spin_lock_init(&bclink->node.lock); 94950100a5eSJon Paul Maloy __skb_queue_head_init(&bclink->node.waiting_sks); 950b97bf3fdSPer Liden bcl->owner = &bclink->node; 9511da46568SYing Xue bcl->owner->net = net; 952b97bf3fdSPer Liden bcl->max_pkt = MAX_PKT_DEFAULT_MCAST; 9534323add6SPer Liden tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); 9547a2f7d18SYing Xue bcl->bearer_id = MAX_BEARERS; 9557f9f95d9SYing Xue rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer); 956b97bf3fdSPer Liden bcl->state = WORKING_WORKING; 9574b704d59SStephen Hemminger strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); 9581da46568SYing Xue tn->bcbearer = bcbearer; 9591da46568SYing Xue tn->bclink = bclink; 9601da46568SYing Xue tn->bcl = bcl; 961eb8b00f5SYing Xue return 0; 962b97bf3fdSPer Liden } 963b97bf3fdSPer Liden 9647f9f95d9SYing Xue void tipc_bclink_stop(struct net *net) 965b97bf3fdSPer Liden { 9667f9f95d9SYing Xue struct tipc_net *tn = net_generic(net, tipc_net_id); 9677f9f95d9SYing Xue 9681da46568SYing Xue tipc_bclink_lock(net); 9691da46568SYing Xue tipc_link_purge_queues(tn->bcl); 9701da46568SYing Xue tipc_bclink_unlock(net); 971c47e9b91SAllan Stephens 9727f9f95d9SYing Xue RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL); 973eb8b00f5SYing Xue synchronize_net(); 9741da46568SYing Xue kfree(tn->bcbearer); 9751da46568SYing Xue kfree(tn->bclink); 976b97bf3fdSPer Liden } 977b97bf3fdSPer Liden 9783e22e62bSAllan Stephens /** 9793e22e62bSAllan Stephens * tipc_nmap_add - add a node to a node map 9803e22e62bSAllan Stephens */ 98128dd9418SYing Xue static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node) 9823e22e62bSAllan Stephens { 9833e22e62bSAllan Stephens int n = tipc_node(node); 9843e22e62bSAllan Stephens int w = n / WSIZE; 9853e22e62bSAllan Stephens u32 mask = (1 << (n % WSIZE)); 9863e22e62bSAllan Stephens 9873e22e62bSAllan Stephens if ((nm_ptr->map[w] & mask) == 0) { 9883e22e62bSAllan Stephens nm_ptr->count++; 9893e22e62bSAllan Stephens nm_ptr->map[w] |= mask; 9903e22e62bSAllan Stephens } 9913e22e62bSAllan Stephens } 9923e22e62bSAllan Stephens 9933e22e62bSAllan Stephens /** 9943e22e62bSAllan Stephens * tipc_nmap_remove - remove a node from a node map 9953e22e62bSAllan Stephens */ 99628dd9418SYing Xue static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node) 9973e22e62bSAllan Stephens { 9983e22e62bSAllan Stephens int n = tipc_node(node); 9993e22e62bSAllan Stephens int w = n / WSIZE; 10003e22e62bSAllan Stephens u32 mask = (1 << (n % WSIZE)); 10013e22e62bSAllan Stephens 10023e22e62bSAllan Stephens if ((nm_ptr->map[w] & mask) != 0) { 10033e22e62bSAllan Stephens nm_ptr->map[w] &= ~mask; 10043e22e62bSAllan Stephens nm_ptr->count--; 10053e22e62bSAllan Stephens } 10063e22e62bSAllan Stephens } 10073e22e62bSAllan Stephens 10083e22e62bSAllan Stephens /** 10093e22e62bSAllan Stephens * tipc_nmap_diff - find differences between node maps 10103e22e62bSAllan Stephens * @nm_a: input node map A 10113e22e62bSAllan Stephens * @nm_b: input node map B 10123e22e62bSAllan Stephens * @nm_diff: output node map A-B (i.e. nodes of A that are not in B) 10133e22e62bSAllan Stephens */ 101431e3c3f6Sstephen hemminger static void tipc_nmap_diff(struct tipc_node_map *nm_a, 101531e3c3f6Sstephen hemminger struct tipc_node_map *nm_b, 10163e22e62bSAllan Stephens struct tipc_node_map *nm_diff) 10173e22e62bSAllan Stephens { 10183e22e62bSAllan Stephens int stop = ARRAY_SIZE(nm_a->map); 10193e22e62bSAllan Stephens int w; 10203e22e62bSAllan Stephens int b; 10213e22e62bSAllan Stephens u32 map; 10223e22e62bSAllan Stephens 10233e22e62bSAllan Stephens memset(nm_diff, 0, sizeof(*nm_diff)); 10243e22e62bSAllan Stephens for (w = 0; w < stop; w++) { 10253e22e62bSAllan Stephens map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]); 10263e22e62bSAllan Stephens nm_diff->map[w] = map; 10273e22e62bSAllan Stephens if (map != 0) { 10283e22e62bSAllan Stephens for (b = 0 ; b < WSIZE; b++) { 10293e22e62bSAllan Stephens if (map & (1 << b)) 10303e22e62bSAllan Stephens nm_diff->count++; 10313e22e62bSAllan Stephens } 10323e22e62bSAllan Stephens } 10333e22e62bSAllan Stephens } 10343e22e62bSAllan Stephens } 103543608edcSAllan Stephens 103643608edcSAllan Stephens /** 103743608edcSAllan Stephens * tipc_port_list_add - add a port to a port list, ensuring no duplicates 103843608edcSAllan Stephens */ 10394584310bSPaul Gortmaker void tipc_port_list_add(struct tipc_port_list *pl_ptr, u32 port) 104043608edcSAllan Stephens { 10414584310bSPaul Gortmaker struct tipc_port_list *item = pl_ptr; 104243608edcSAllan Stephens int i; 104343608edcSAllan Stephens int item_sz = PLSIZE; 104443608edcSAllan Stephens int cnt = pl_ptr->count; 104543608edcSAllan Stephens 104643608edcSAllan Stephens for (; ; cnt -= item_sz, item = item->next) { 104743608edcSAllan Stephens if (cnt < PLSIZE) 104843608edcSAllan Stephens item_sz = cnt; 104943608edcSAllan Stephens for (i = 0; i < item_sz; i++) 105043608edcSAllan Stephens if (item->ports[i] == port) 105143608edcSAllan Stephens return; 105243608edcSAllan Stephens if (i < PLSIZE) { 105343608edcSAllan Stephens item->ports[i] = port; 105443608edcSAllan Stephens pl_ptr->count++; 105543608edcSAllan Stephens return; 105643608edcSAllan Stephens } 105743608edcSAllan Stephens if (!item->next) { 105843608edcSAllan Stephens item->next = kmalloc(sizeof(*item), GFP_ATOMIC); 105943608edcSAllan Stephens if (!item->next) { 10602cf8aa19SErik Hugne pr_warn("Incomplete multicast delivery, no memory\n"); 106143608edcSAllan Stephens return; 106243608edcSAllan Stephens } 106343608edcSAllan Stephens item->next->next = NULL; 106443608edcSAllan Stephens } 106543608edcSAllan Stephens } 106643608edcSAllan Stephens } 106743608edcSAllan Stephens 106843608edcSAllan Stephens /** 106943608edcSAllan Stephens * tipc_port_list_free - free dynamically created entries in port_list chain 107043608edcSAllan Stephens * 107143608edcSAllan Stephens */ 10724584310bSPaul Gortmaker void tipc_port_list_free(struct tipc_port_list *pl_ptr) 107343608edcSAllan Stephens { 10744584310bSPaul Gortmaker struct tipc_port_list *item; 10754584310bSPaul Gortmaker struct tipc_port_list *next; 107643608edcSAllan Stephens 107743608edcSAllan Stephens for (item = pl_ptr->next; item; item = next) { 107843608edcSAllan Stephens next = item->next; 107943608edcSAllan Stephens kfree(item); 108043608edcSAllan Stephens } 108143608edcSAllan Stephens } 1082