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 38b97bf3fdSPer Liden #include "core.h" 39b97bf3fdSPer Liden #include "link.h" 40b97bf3fdSPer Liden #include "port.h" 41078bec82SJon Paul Maloy #include "socket.h" 42078bec82SJon Paul Maloy #include "msg.h" 43b97bf3fdSPer Liden #include "bcast.h" 449f6bdcd4SAllan Stephens #include "name_distr.h" 45b97bf3fdSPer Liden 46b97bf3fdSPer Liden #define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */ 47b97bf3fdSPer Liden #define BCLINK_WIN_DEFAULT 20 /* bcast link window size (default) */ 48987b58beSYing Xue #define BCBEARER MAX_BEARERS 49b97bf3fdSPer Liden 50b97bf3fdSPer Liden /** 517f9ab6acSPaul Gortmaker * struct tipc_bcbearer_pair - a pair of bearers used by broadcast link 52b97bf3fdSPer Liden * @primary: pointer to primary bearer 53b97bf3fdSPer Liden * @secondary: pointer to secondary bearer 54b97bf3fdSPer Liden * 55b97bf3fdSPer Liden * Bearers must have same priority and same set of reachable destinations 56b97bf3fdSPer Liden * to be paired. 57b97bf3fdSPer Liden */ 58b97bf3fdSPer Liden 597f9ab6acSPaul Gortmaker struct tipc_bcbearer_pair { 602d627b92SAllan Stephens struct tipc_bearer *primary; 612d627b92SAllan Stephens struct tipc_bearer *secondary; 62b97bf3fdSPer Liden }; 63b97bf3fdSPer Liden 64b97bf3fdSPer Liden /** 657f9ab6acSPaul Gortmaker * struct tipc_bcbearer - bearer used by broadcast link 66b97bf3fdSPer Liden * @bearer: (non-standard) broadcast bearer structure 67b97bf3fdSPer Liden * @media: (non-standard) broadcast media structure 68b97bf3fdSPer Liden * @bpairs: array of bearer pairs 6965f51ef0SAllan Stephens * @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort() 7065f51ef0SAllan Stephens * @remains: temporary node map used by tipc_bcbearer_send() 7165f51ef0SAllan Stephens * @remains_new: temporary node map used tipc_bcbearer_send() 7265f51ef0SAllan Stephens * 7365f51ef0SAllan Stephens * Note: The fields labelled "temporary" are incorporated into the bearer 7465f51ef0SAllan Stephens * to avoid consuming potentially limited stack space through the use of 7565f51ef0SAllan Stephens * large local variables within multicast routines. Concurrent access is 76d69afc90SYing Xue * prevented through use of the spinlock "bclink_lock". 77b97bf3fdSPer Liden */ 787f9ab6acSPaul Gortmaker struct tipc_bcbearer { 792d627b92SAllan Stephens struct tipc_bearer bearer; 80358a0d1cSPaul Gortmaker struct tipc_media media; 817f9ab6acSPaul Gortmaker struct tipc_bcbearer_pair bpairs[MAX_BEARERS]; 827f9ab6acSPaul Gortmaker struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1]; 836c00055aSDavid S. Miller struct tipc_node_map remains; 846c00055aSDavid S. Miller struct tipc_node_map remains_new; 85b97bf3fdSPer Liden }; 86b97bf3fdSPer Liden 87b97bf3fdSPer Liden /** 886765fd67SPaul Gortmaker * struct tipc_bclink - link used for broadcast messages 89d69afc90SYing Xue * @lock: spinlock governing access to structure 90b97bf3fdSPer Liden * @link: (non-standard) broadcast link structure 91b97bf3fdSPer Liden * @node: (non-standard) node structure representing b'cast link's peer node 923f5a12bdSYing Xue * @flags: represent bclink states 93cd3decdfSAllan Stephens * @bcast_nodes: map of broadcast-capable nodes 9401d83eddSAllan Stephens * @retransmit_to: node that most recently requested a retransmit 95b97bf3fdSPer Liden * 96b97bf3fdSPer Liden * Handles sequence numbering, fragmentation, bundling, etc. 97b97bf3fdSPer Liden */ 986765fd67SPaul Gortmaker struct tipc_bclink { 99d69afc90SYing Xue spinlock_t lock; 100a18c4bc3SPaul Gortmaker struct tipc_link link; 1016c00055aSDavid S. Miller struct tipc_node node; 1023f5a12bdSYing Xue unsigned int flags; 103cd3decdfSAllan Stephens struct tipc_node_map bcast_nodes; 10401d83eddSAllan Stephens struct tipc_node *retransmit_to; 105b97bf3fdSPer Liden }; 106b97bf3fdSPer Liden 107eb8b00f5SYing Xue static struct tipc_bcbearer *bcbearer; 108eb8b00f5SYing Xue static struct tipc_bclink *bclink; 109eb8b00f5SYing Xue static struct tipc_link *bcl; 110c47e9b91SAllan Stephens 1113aec9cc9SAllan Stephens const char tipc_bclink_name[] = "broadcast-link"; 112b97bf3fdSPer Liden 11331e3c3f6Sstephen hemminger static void tipc_nmap_diff(struct tipc_node_map *nm_a, 11431e3c3f6Sstephen hemminger struct tipc_node_map *nm_b, 11531e3c3f6Sstephen hemminger struct tipc_node_map *nm_diff); 11628dd9418SYing Xue static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node); 11728dd9418SYing Xue static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node); 118b97bf3fdSPer Liden 119d69afc90SYing Xue static void tipc_bclink_lock(void) 120d69afc90SYing Xue { 121d69afc90SYing Xue spin_lock_bh(&bclink->lock); 122d69afc90SYing Xue } 123d69afc90SYing Xue 124d69afc90SYing Xue static void tipc_bclink_unlock(void) 125d69afc90SYing Xue { 1263f5a12bdSYing Xue struct tipc_node *node = NULL; 1273f5a12bdSYing Xue 1283f5a12bdSYing Xue if (likely(!bclink->flags)) { 129d69afc90SYing Xue spin_unlock_bh(&bclink->lock); 1303f5a12bdSYing Xue return; 1313f5a12bdSYing Xue } 1323f5a12bdSYing Xue 1333f5a12bdSYing Xue if (bclink->flags & TIPC_BCLINK_RESET) { 1343f5a12bdSYing Xue bclink->flags &= ~TIPC_BCLINK_RESET; 1353f5a12bdSYing Xue node = tipc_bclink_retransmit_to(); 1363f5a12bdSYing Xue } 1373f5a12bdSYing Xue spin_unlock_bh(&bclink->lock); 1383f5a12bdSYing Xue 1393f5a12bdSYing Xue if (node) 1403f5a12bdSYing Xue tipc_link_reset_all(node); 1413f5a12bdSYing Xue } 1423f5a12bdSYing Xue 143078bec82SJon Paul Maloy uint tipc_bclink_get_mtu(void) 144078bec82SJon Paul Maloy { 145078bec82SJon Paul Maloy return MAX_PKT_DEFAULT_MCAST; 146078bec82SJon Paul Maloy } 147078bec82SJon Paul Maloy 1483f5a12bdSYing Xue void tipc_bclink_set_flags(unsigned int flags) 1493f5a12bdSYing Xue { 1503f5a12bdSYing Xue bclink->flags |= flags; 151d69afc90SYing Xue } 152d69afc90SYing Xue 15305790c64SSam Ravnborg static u32 bcbuf_acks(struct sk_buff *buf) 154b97bf3fdSPer Liden { 155880b005fSDavid S. Miller return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle; 156b97bf3fdSPer Liden } 157b97bf3fdSPer Liden 15805790c64SSam Ravnborg static void bcbuf_set_acks(struct sk_buff *buf, u32 acks) 159b97bf3fdSPer Liden { 160880b005fSDavid S. Miller TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks; 161b97bf3fdSPer Liden } 162b97bf3fdSPer Liden 16305790c64SSam Ravnborg static void bcbuf_decr_acks(struct sk_buff *buf) 164b97bf3fdSPer Liden { 165b97bf3fdSPer Liden bcbuf_set_acks(buf, bcbuf_acks(buf) - 1); 166b97bf3fdSPer Liden } 167b97bf3fdSPer Liden 168cd3decdfSAllan Stephens void tipc_bclink_add_node(u32 addr) 169cd3decdfSAllan Stephens { 170d69afc90SYing Xue tipc_bclink_lock(); 171cd3decdfSAllan Stephens tipc_nmap_add(&bclink->bcast_nodes, addr); 172d69afc90SYing Xue tipc_bclink_unlock(); 173cd3decdfSAllan Stephens } 174cd3decdfSAllan Stephens 175cd3decdfSAllan Stephens void tipc_bclink_remove_node(u32 addr) 176cd3decdfSAllan Stephens { 177d69afc90SYing Xue tipc_bclink_lock(); 178cd3decdfSAllan Stephens tipc_nmap_remove(&bclink->bcast_nodes, addr); 179d69afc90SYing Xue tipc_bclink_unlock(); 180cd3decdfSAllan Stephens } 181b97bf3fdSPer Liden 1825b1f7bdeSAllan Stephens static void bclink_set_last_sent(void) 1835b1f7bdeSAllan Stephens { 1845b1f7bdeSAllan Stephens if (bcl->next_out) 1855b1f7bdeSAllan Stephens bcl->fsm_msg_cnt = mod(buf_seqno(bcl->next_out) - 1); 1865b1f7bdeSAllan Stephens else 1875b1f7bdeSAllan Stephens bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1); 1885b1f7bdeSAllan Stephens } 1895b1f7bdeSAllan Stephens 1905b1f7bdeSAllan Stephens u32 tipc_bclink_get_last_sent(void) 1915b1f7bdeSAllan Stephens { 1925b1f7bdeSAllan Stephens return bcl->fsm_msg_cnt; 1935b1f7bdeSAllan Stephens } 1945b1f7bdeSAllan Stephens 1957a54d4a9SAllan Stephens static void bclink_update_last_sent(struct tipc_node *node, u32 seqno) 196b97bf3fdSPer Liden { 1977a54d4a9SAllan Stephens node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ? 1987a54d4a9SAllan Stephens seqno : node->bclink.last_sent; 199b97bf3fdSPer Liden } 200b97bf3fdSPer Liden 201b97bf3fdSPer Liden 2022c53040fSBen Hutchings /** 20301d83eddSAllan Stephens * tipc_bclink_retransmit_to - get most recent node to request retransmission 20401d83eddSAllan Stephens * 205d69afc90SYing Xue * Called with bclink_lock locked 20601d83eddSAllan Stephens */ 20701d83eddSAllan Stephens struct tipc_node *tipc_bclink_retransmit_to(void) 20801d83eddSAllan Stephens { 20901d83eddSAllan Stephens return bclink->retransmit_to; 21001d83eddSAllan Stephens } 21101d83eddSAllan Stephens 21201d83eddSAllan Stephens /** 213b97bf3fdSPer Liden * bclink_retransmit_pkt - retransmit broadcast packets 214b97bf3fdSPer Liden * @after: sequence number of last packet to *not* retransmit 215b97bf3fdSPer Liden * @to: sequence number of last packet to retransmit 216b97bf3fdSPer Liden * 217d69afc90SYing Xue * Called with bclink_lock locked 218b97bf3fdSPer Liden */ 219b97bf3fdSPer Liden static void bclink_retransmit_pkt(u32 after, u32 to) 220b97bf3fdSPer Liden { 221b97bf3fdSPer Liden struct sk_buff *buf; 222b97bf3fdSPer Liden 223b97bf3fdSPer Liden buf = bcl->first_out; 224a016892cSAllan Stephens while (buf && less_eq(buf_seqno(buf), after)) 225b97bf3fdSPer Liden buf = buf->next; 2264323add6SPer Liden tipc_link_retransmit(bcl, buf, mod(to - after)); 227b97bf3fdSPer Liden } 228b97bf3fdSPer Liden 229b97bf3fdSPer Liden /** 2304323add6SPer Liden * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets 231b97bf3fdSPer Liden * @n_ptr: node that sent acknowledgement info 232b97bf3fdSPer Liden * @acked: broadcast sequence # that has been acknowledged 233b97bf3fdSPer Liden * 234d69afc90SYing Xue * Node is locked, bclink_lock unlocked. 235b97bf3fdSPer Liden */ 2366c00055aSDavid S. Miller void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked) 237b97bf3fdSPer Liden { 238b97bf3fdSPer Liden struct sk_buff *crs; 239b97bf3fdSPer Liden struct sk_buff *next; 240b97bf3fdSPer Liden unsigned int released = 0; 241b97bf3fdSPer Liden 242d69afc90SYing Xue tipc_bclink_lock(); 24336559591SAllan Stephens /* Bail out if tx queue is empty (no clean up is required) */ 244b97bf3fdSPer Liden crs = bcl->first_out; 24536559591SAllan Stephens if (!crs) 24636559591SAllan Stephens goto exit; 24736559591SAllan Stephens 24836559591SAllan Stephens /* Determine which messages need to be acknowledged */ 24936559591SAllan Stephens if (acked == INVALID_LINK_SEQ) { 25036559591SAllan Stephens /* 25136559591SAllan Stephens * Contact with specified node has been lost, so need to 25236559591SAllan Stephens * acknowledge sent messages only (if other nodes still exist) 25336559591SAllan Stephens * or both sent and unsent messages (otherwise) 25436559591SAllan Stephens */ 25536559591SAllan Stephens if (bclink->bcast_nodes.count) 25636559591SAllan Stephens acked = bcl->fsm_msg_cnt; 25736559591SAllan Stephens else 25836559591SAllan Stephens acked = bcl->next_out_no; 25936559591SAllan Stephens } else { 26036559591SAllan Stephens /* 26136559591SAllan Stephens * Bail out if specified sequence number does not correspond 26236559591SAllan Stephens * to a message that has been sent and not yet acknowledged 26336559591SAllan Stephens */ 26436559591SAllan Stephens if (less(acked, buf_seqno(crs)) || 26536559591SAllan Stephens less(bcl->fsm_msg_cnt, acked) || 26636559591SAllan Stephens less_eq(acked, n_ptr->bclink.acked)) 26736559591SAllan Stephens goto exit; 26836559591SAllan Stephens } 26936559591SAllan Stephens 27036559591SAllan Stephens /* Skip over packets that node has previously acknowledged */ 271a016892cSAllan Stephens while (crs && less_eq(buf_seqno(crs), n_ptr->bclink.acked)) 272b97bf3fdSPer Liden crs = crs->next; 273b97bf3fdSPer Liden 274b97bf3fdSPer Liden /* Update packets that node is now acknowledging */ 275b97bf3fdSPer Liden 276b97bf3fdSPer Liden while (crs && less_eq(buf_seqno(crs), acked)) { 277b97bf3fdSPer Liden next = crs->next; 27810745cd5SAllan Stephens 27910745cd5SAllan Stephens if (crs != bcl->next_out) 280b97bf3fdSPer Liden bcbuf_decr_acks(crs); 28110745cd5SAllan Stephens else { 28210745cd5SAllan Stephens bcbuf_set_acks(crs, 0); 28310745cd5SAllan Stephens bcl->next_out = next; 28410745cd5SAllan Stephens bclink_set_last_sent(); 28510745cd5SAllan Stephens } 28610745cd5SAllan Stephens 287b97bf3fdSPer Liden if (bcbuf_acks(crs) == 0) { 288b97bf3fdSPer Liden bcl->first_out = next; 289b97bf3fdSPer Liden bcl->out_queue_size--; 2905f6d9123SAllan Stephens kfree_skb(crs); 291b97bf3fdSPer Liden released = 1; 292b97bf3fdSPer Liden } 293b97bf3fdSPer Liden crs = next; 294b97bf3fdSPer Liden } 295b97bf3fdSPer Liden n_ptr->bclink.acked = acked; 296b97bf3fdSPer Liden 297b97bf3fdSPer Liden /* Try resolving broadcast link congestion, if necessary */ 298b97bf3fdSPer Liden 2995b1f7bdeSAllan Stephens if (unlikely(bcl->next_out)) { 3004323add6SPer Liden tipc_link_push_queue(bcl); 3015b1f7bdeSAllan Stephens bclink_set_last_sent(); 3025b1f7bdeSAllan Stephens } 303b97bf3fdSPer Liden if (unlikely(released && !list_empty(&bcl->waiting_ports))) 3044323add6SPer Liden tipc_link_wakeup_ports(bcl, 0); 30536559591SAllan Stephens exit: 306d69afc90SYing Xue tipc_bclink_unlock(); 307b97bf3fdSPer Liden } 308b97bf3fdSPer Liden 3092c53040fSBen Hutchings /** 3107a54d4a9SAllan Stephens * tipc_bclink_update_link_state - update broadcast link state 311b97bf3fdSPer Liden * 3127216cd94SYing Xue * RCU and node lock set 313b97bf3fdSPer Liden */ 3147a54d4a9SAllan Stephens void tipc_bclink_update_link_state(struct tipc_node *n_ptr, u32 last_sent) 315b97bf3fdSPer Liden { 316b97bf3fdSPer Liden struct sk_buff *buf; 317b97bf3fdSPer Liden 3187a54d4a9SAllan Stephens /* Ignore "stale" link state info */ 3197a54d4a9SAllan Stephens 3207a54d4a9SAllan Stephens if (less_eq(last_sent, n_ptr->bclink.last_in)) 321b97bf3fdSPer Liden return; 322b97bf3fdSPer Liden 3237a54d4a9SAllan Stephens /* Update link synchronization state; quit if in sync */ 3247a54d4a9SAllan Stephens 3257a54d4a9SAllan Stephens bclink_update_last_sent(n_ptr, last_sent); 3267a54d4a9SAllan Stephens 3277a54d4a9SAllan Stephens if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in) 3287a54d4a9SAllan Stephens return; 3297a54d4a9SAllan Stephens 3307a54d4a9SAllan Stephens /* Update out-of-sync state; quit if loss is still unconfirmed */ 3317a54d4a9SAllan Stephens 3327a54d4a9SAllan Stephens if ((++n_ptr->bclink.oos_state) == 1) { 3337a54d4a9SAllan Stephens if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2)) 3347a54d4a9SAllan Stephens return; 3357a54d4a9SAllan Stephens n_ptr->bclink.oos_state++; 3367a54d4a9SAllan Stephens } 3377a54d4a9SAllan Stephens 3387a54d4a9SAllan Stephens /* Don't NACK if one has been recently sent (or seen) */ 3397a54d4a9SAllan Stephens 3407a54d4a9SAllan Stephens if (n_ptr->bclink.oos_state & 0x1) 3417a54d4a9SAllan Stephens return; 3427a54d4a9SAllan Stephens 3437a54d4a9SAllan Stephens /* Send NACK */ 3447a54d4a9SAllan Stephens 34531e3c3f6Sstephen hemminger buf = tipc_buf_acquire(INT_H_SIZE); 346b97bf3fdSPer Liden if (buf) { 3477a54d4a9SAllan Stephens struct tipc_msg *msg = buf_msg(buf); 3487a54d4a9SAllan Stephens 349c68ca7b7SAllan Stephens tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG, 35075715217SAllan Stephens INT_H_SIZE, n_ptr->addr); 351bf781ecfSAllan Stephens msg_set_non_seq(msg, 1); 352b97bf3fdSPer Liden msg_set_mc_netid(msg, tipc_net_id); 3537a54d4a9SAllan Stephens msg_set_bcast_ack(msg, n_ptr->bclink.last_in); 3547a54d4a9SAllan Stephens msg_set_bcgap_after(msg, n_ptr->bclink.last_in); 3557a54d4a9SAllan Stephens msg_set_bcgap_to(msg, n_ptr->bclink.deferred_head 3567a54d4a9SAllan Stephens ? buf_seqno(n_ptr->bclink.deferred_head) - 1 3577a54d4a9SAllan Stephens : n_ptr->bclink.last_sent); 358b97bf3fdSPer Liden 359d69afc90SYing Xue tipc_bclink_lock(); 3607a2f7d18SYing Xue tipc_bearer_send(MAX_BEARERS, buf, NULL); 361b97bf3fdSPer Liden bcl->stats.sent_nacks++; 362d69afc90SYing Xue tipc_bclink_unlock(); 3635f6d9123SAllan Stephens kfree_skb(buf); 364b97bf3fdSPer Liden 3657a54d4a9SAllan Stephens n_ptr->bclink.oos_state++; 3667a54d4a9SAllan Stephens } 3677a54d4a9SAllan Stephens } 3687a54d4a9SAllan Stephens 3692c53040fSBen Hutchings /** 3707a54d4a9SAllan Stephens * bclink_peek_nack - monitor retransmission requests sent by other nodes 371b97bf3fdSPer Liden * 3727a54d4a9SAllan Stephens * Delay any upcoming NACK by this node if another node has already 3737a54d4a9SAllan Stephens * requested the first message this node is going to ask for. 374b97bf3fdSPer Liden */ 3757a54d4a9SAllan Stephens static void bclink_peek_nack(struct tipc_msg *msg) 376b97bf3fdSPer Liden { 3777a54d4a9SAllan Stephens struct tipc_node *n_ptr = tipc_node_find(msg_destnode(msg)); 378b97bf3fdSPer Liden 3797a54d4a9SAllan Stephens if (unlikely(!n_ptr)) 380b97bf3fdSPer Liden return; 3817a54d4a9SAllan Stephens 3824323add6SPer Liden tipc_node_lock(n_ptr); 383b97bf3fdSPer Liden 384389dd9bcSYing Xue if (n_ptr->bclink.recv_permitted && 3857a54d4a9SAllan Stephens (n_ptr->bclink.last_in != n_ptr->bclink.last_sent) && 3867a54d4a9SAllan Stephens (n_ptr->bclink.last_in == msg_bcgap_after(msg))) 3877a54d4a9SAllan Stephens n_ptr->bclink.oos_state = 2; 388b97bf3fdSPer Liden 3894323add6SPer Liden tipc_node_unlock(n_ptr); 390b97bf3fdSPer Liden } 391b97bf3fdSPer Liden 3929fbfb8b1SJon Paul Maloy /* tipc_bclink_xmit - broadcast buffer chain to all nodes in cluster 393078bec82SJon Paul Maloy * and to identified node local sockets 394078bec82SJon Paul Maloy * @buf: chain of buffers containing message 395078bec82SJon Paul Maloy * Consumes the buffer chain, except when returning -ELINKCONG 396078bec82SJon Paul Maloy * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE 397078bec82SJon Paul Maloy */ 3989fbfb8b1SJon Paul Maloy int tipc_bclink_xmit(struct sk_buff *buf) 399078bec82SJon Paul Maloy { 400078bec82SJon Paul Maloy int rc = 0; 401078bec82SJon Paul Maloy int bc = 0; 402078bec82SJon Paul Maloy struct sk_buff *clbuf; 403078bec82SJon Paul Maloy 404078bec82SJon Paul Maloy /* Prepare clone of message for local node */ 405078bec82SJon Paul Maloy clbuf = tipc_msg_reassemble(buf); 406078bec82SJon Paul Maloy if (unlikely(!clbuf)) { 407078bec82SJon Paul Maloy kfree_skb_list(buf); 408078bec82SJon Paul Maloy return -EHOSTUNREACH; 409078bec82SJon Paul Maloy } 410078bec82SJon Paul Maloy 411078bec82SJon Paul Maloy /* Broadcast to all other nodes */ 412078bec82SJon Paul Maloy if (likely(bclink)) { 413078bec82SJon Paul Maloy tipc_bclink_lock(); 414078bec82SJon Paul Maloy if (likely(bclink->bcast_nodes.count)) { 415078bec82SJon Paul Maloy rc = __tipc_link_xmit(bcl, buf); 416078bec82SJon Paul Maloy if (likely(!rc)) { 417078bec82SJon Paul Maloy bclink_set_last_sent(); 418078bec82SJon Paul Maloy bcl->stats.queue_sz_counts++; 419078bec82SJon Paul Maloy bcl->stats.accu_queue_sz += bcl->out_queue_size; 420078bec82SJon Paul Maloy } 421078bec82SJon Paul Maloy bc = 1; 422078bec82SJon Paul Maloy } 423078bec82SJon Paul Maloy tipc_bclink_unlock(); 424078bec82SJon Paul Maloy } 425078bec82SJon Paul Maloy 426078bec82SJon Paul Maloy if (unlikely(!bc)) 427078bec82SJon Paul Maloy kfree_skb_list(buf); 428078bec82SJon Paul Maloy 429078bec82SJon Paul Maloy /* Deliver message clone */ 430078bec82SJon Paul Maloy if (likely(!rc)) 431078bec82SJon Paul Maloy tipc_sk_mcast_rcv(clbuf); 432078bec82SJon Paul Maloy else 433078bec82SJon Paul Maloy kfree_skb(clbuf); 434078bec82SJon Paul Maloy 435078bec82SJon Paul Maloy return rc; 436078bec82SJon Paul Maloy } 437078bec82SJon Paul Maloy 4382c53040fSBen Hutchings /** 43963e7f1acSAllan Stephens * bclink_accept_pkt - accept an incoming, in-sequence broadcast packet 44063e7f1acSAllan Stephens * 441d69afc90SYing Xue * Called with both sending node's lock and bclink_lock taken. 44263e7f1acSAllan Stephens */ 44363e7f1acSAllan Stephens static void bclink_accept_pkt(struct tipc_node *node, u32 seqno) 44463e7f1acSAllan Stephens { 44563e7f1acSAllan Stephens bclink_update_last_sent(node, seqno); 44663e7f1acSAllan Stephens node->bclink.last_in = seqno; 44763e7f1acSAllan Stephens node->bclink.oos_state = 0; 44863e7f1acSAllan Stephens bcl->stats.recv_info++; 44963e7f1acSAllan Stephens 45063e7f1acSAllan Stephens /* 45163e7f1acSAllan Stephens * Unicast an ACK periodically, ensuring that 45263e7f1acSAllan Stephens * all nodes in the cluster don't ACK at the same time 45363e7f1acSAllan Stephens */ 45463e7f1acSAllan Stephens 45563e7f1acSAllan Stephens if (((seqno - tipc_own_addr) % TIPC_MIN_LINK_WIN) == 0) { 456247f0f3cSYing Xue tipc_link_proto_xmit(node->active_links[node->addr & 1], 45763e7f1acSAllan Stephens STATE_MSG, 0, 0, 0, 0, 0); 45863e7f1acSAllan Stephens bcl->stats.sent_acks++; 45963e7f1acSAllan Stephens } 46063e7f1acSAllan Stephens } 46163e7f1acSAllan Stephens 4622c53040fSBen Hutchings /** 463247f0f3cSYing Xue * tipc_bclink_rcv - receive a broadcast packet, and deliver upwards 464b97bf3fdSPer Liden * 4657216cd94SYing Xue * RCU is locked, no other locks set 466b97bf3fdSPer Liden */ 467247f0f3cSYing Xue void tipc_bclink_rcv(struct sk_buff *buf) 468b97bf3fdSPer Liden { 469b97bf3fdSPer Liden struct tipc_msg *msg = buf_msg(buf); 4705d3c488dSAllan Stephens struct tipc_node *node; 471b97bf3fdSPer Liden u32 next_in; 472b97bf3fdSPer Liden u32 seqno; 4730abd8ff2SJon Paul Maloy int deferred = 0; 474b97bf3fdSPer Liden 4755d3c488dSAllan Stephens /* Screen out unwanted broadcast messages */ 4765d3c488dSAllan Stephens 4775d3c488dSAllan Stephens if (msg_mc_netid(msg) != tipc_net_id) 4785d3c488dSAllan Stephens goto exit; 4795d3c488dSAllan Stephens 4805d3c488dSAllan Stephens node = tipc_node_find(msg_prevnode(msg)); 4815d3c488dSAllan Stephens if (unlikely(!node)) 4825d3c488dSAllan Stephens goto exit; 4835d3c488dSAllan Stephens 4845d3c488dSAllan Stephens tipc_node_lock(node); 485389dd9bcSYing Xue if (unlikely(!node->bclink.recv_permitted)) 4865d3c488dSAllan Stephens goto unlock; 487b97bf3fdSPer Liden 4888a275a6aSAllan Stephens /* Handle broadcast protocol message */ 4898a275a6aSAllan Stephens 490b97bf3fdSPer Liden if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) { 4919f6bdcd4SAllan Stephens if (msg_type(msg) != STATE_MSG) 4929f6bdcd4SAllan Stephens goto unlock; 493b97bf3fdSPer Liden if (msg_destnode(msg) == tipc_own_addr) { 4944323add6SPer Liden tipc_bclink_acknowledge(node, msg_bcast_ack(msg)); 4954323add6SPer Liden tipc_node_unlock(node); 496d69afc90SYing Xue tipc_bclink_lock(); 497b97bf3fdSPer Liden bcl->stats.recv_nacks++; 49801d83eddSAllan Stephens bclink->retransmit_to = node; 499b97bf3fdSPer Liden bclink_retransmit_pkt(msg_bcgap_after(msg), 500b97bf3fdSPer Liden msg_bcgap_to(msg)); 501d69afc90SYing Xue tipc_bclink_unlock(); 502b97bf3fdSPer Liden } else { 5035d3c488dSAllan Stephens tipc_node_unlock(node); 5047a54d4a9SAllan Stephens bclink_peek_nack(msg); 505b97bf3fdSPer Liden } 5065d3c488dSAllan Stephens goto exit; 507b97bf3fdSPer Liden } 508b97bf3fdSPer Liden 5095d3c488dSAllan Stephens /* Handle in-sequence broadcast message */ 5105d3c488dSAllan Stephens 511b97bf3fdSPer Liden seqno = msg_seqno(msg); 5128a275a6aSAllan Stephens next_in = mod(node->bclink.last_in + 1); 513b97bf3fdSPer Liden 514b97bf3fdSPer Liden if (likely(seqno == next_in)) { 5158a275a6aSAllan Stephens receive: 5167a54d4a9SAllan Stephens /* Deliver message to destination */ 5177a54d4a9SAllan Stephens 518b97bf3fdSPer Liden if (likely(msg_isdata(msg))) { 519d69afc90SYing Xue tipc_bclink_lock(); 52063e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 521d69afc90SYing Xue tipc_bclink_unlock(); 5224323add6SPer Liden tipc_node_unlock(node); 5239f6bdcd4SAllan Stephens if (likely(msg_mcast(msg))) 5240abd8ff2SJon Paul Maloy tipc_sk_mcast_rcv(buf); 5259f6bdcd4SAllan Stephens else 5265f6d9123SAllan Stephens kfree_skb(buf); 527b97bf3fdSPer Liden } else if (msg_user(msg) == MSG_BUNDLER) { 528d69afc90SYing Xue tipc_bclink_lock(); 52963e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 530b97bf3fdSPer Liden bcl->stats.recv_bundles++; 531b97bf3fdSPer Liden bcl->stats.recv_bundled += msg_msgcnt(msg); 532d69afc90SYing Xue tipc_bclink_unlock(); 5334323add6SPer Liden tipc_node_unlock(node); 534247f0f3cSYing Xue tipc_link_bundle_rcv(buf); 535b97bf3fdSPer Liden } else if (msg_user(msg) == MSG_FRAGMENTER) { 53637e22164SJon Paul Maloy tipc_buf_append(&node->bclink.reasm_buf, &buf); 53737e22164SJon Paul Maloy if (unlikely(!buf && !node->bclink.reasm_buf)) 53863e7f1acSAllan Stephens goto unlock; 539d69afc90SYing Xue tipc_bclink_lock(); 54063e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 541b97bf3fdSPer Liden bcl->stats.recv_fragments++; 54237e22164SJon Paul Maloy if (buf) { 543b97bf3fdSPer Liden bcl->stats.recv_fragmented++; 54440ba3cdfSErik Hugne msg = buf_msg(buf); 545d69afc90SYing Xue tipc_bclink_unlock(); 546528f6f4bSErik Hugne goto receive; 547528f6f4bSErik Hugne } 548d69afc90SYing Xue tipc_bclink_unlock(); 5494323add6SPer Liden tipc_node_unlock(node); 5509f6bdcd4SAllan Stephens } else if (msg_user(msg) == NAME_DISTRIBUTOR) { 551d69afc90SYing Xue tipc_bclink_lock(); 55263e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 553d69afc90SYing Xue tipc_bclink_unlock(); 5549f6bdcd4SAllan Stephens tipc_node_unlock(node); 555247f0f3cSYing Xue tipc_named_rcv(buf); 556b97bf3fdSPer Liden } else { 557d69afc90SYing Xue tipc_bclink_lock(); 55863e7f1acSAllan Stephens bclink_accept_pkt(node, seqno); 559d69afc90SYing Xue tipc_bclink_unlock(); 5604323add6SPer Liden tipc_node_unlock(node); 5615f6d9123SAllan Stephens kfree_skb(buf); 562b97bf3fdSPer Liden } 5635d3c488dSAllan Stephens buf = NULL; 5648a275a6aSAllan Stephens 5658a275a6aSAllan Stephens /* Determine new synchronization state */ 5668a275a6aSAllan Stephens 5674323add6SPer Liden tipc_node_lock(node); 5688a275a6aSAllan Stephens if (unlikely(!tipc_node_is_up(node))) 5698a275a6aSAllan Stephens goto unlock; 5708a275a6aSAllan Stephens 5717a54d4a9SAllan Stephens if (node->bclink.last_in == node->bclink.last_sent) 5728a275a6aSAllan Stephens goto unlock; 5738a275a6aSAllan Stephens 5747a54d4a9SAllan Stephens if (!node->bclink.deferred_head) { 5757a54d4a9SAllan Stephens node->bclink.oos_state = 1; 5767a54d4a9SAllan Stephens goto unlock; 5777a54d4a9SAllan Stephens } 5787a54d4a9SAllan Stephens 5798a275a6aSAllan Stephens msg = buf_msg(node->bclink.deferred_head); 5808a275a6aSAllan Stephens seqno = msg_seqno(msg); 5818a275a6aSAllan Stephens next_in = mod(next_in + 1); 5828a275a6aSAllan Stephens if (seqno != next_in) 5838a275a6aSAllan Stephens goto unlock; 5848a275a6aSAllan Stephens 5858a275a6aSAllan Stephens /* Take in-sequence message from deferred queue & deliver it */ 5868a275a6aSAllan Stephens 5878a275a6aSAllan Stephens buf = node->bclink.deferred_head; 5888a275a6aSAllan Stephens node->bclink.deferred_head = buf->next; 58999941754SJon Paul Maloy buf->next = NULL; 5907a54d4a9SAllan Stephens node->bclink.deferred_size--; 591b97bf3fdSPer Liden goto receive; 592b97bf3fdSPer Liden } 5938a275a6aSAllan Stephens 5948a275a6aSAllan Stephens /* Handle out-of-sequence broadcast message */ 5958a275a6aSAllan Stephens 5968a275a6aSAllan Stephens if (less(next_in, seqno)) { 5978a275a6aSAllan Stephens deferred = tipc_link_defer_pkt(&node->bclink.deferred_head, 598b97bf3fdSPer Liden &node->bclink.deferred_tail, 5998a275a6aSAllan Stephens buf); 6007a54d4a9SAllan Stephens node->bclink.deferred_size += deferred; 6017a54d4a9SAllan Stephens bclink_update_last_sent(node, seqno); 6025d3c488dSAllan Stephens buf = NULL; 6030abd8ff2SJon Paul Maloy } 6048a275a6aSAllan Stephens 605d69afc90SYing Xue tipc_bclink_lock(); 606b98158e3SAllan Stephens 6078a275a6aSAllan Stephens if (deferred) 6088a275a6aSAllan Stephens bcl->stats.deferred_recv++; 6090232c5a5SAllan Stephens else 6100232c5a5SAllan Stephens bcl->stats.duplicates++; 6118a275a6aSAllan Stephens 612d69afc90SYing Xue tipc_bclink_unlock(); 613b98158e3SAllan Stephens 6145d3c488dSAllan Stephens unlock: 6154323add6SPer Liden tipc_node_unlock(node); 6165d3c488dSAllan Stephens exit: 6175f6d9123SAllan Stephens kfree_skb(buf); 618b97bf3fdSPer Liden } 619b97bf3fdSPer Liden 6206c00055aSDavid S. Miller u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr) 621b97bf3fdSPer Liden { 622389dd9bcSYing Xue return (n_ptr->bclink.recv_permitted && 6234323add6SPer Liden (tipc_bclink_get_last_sent() != n_ptr->bclink.acked)); 624b97bf3fdSPer Liden } 625b97bf3fdSPer Liden 626b97bf3fdSPer Liden 627b97bf3fdSPer Liden /** 6284323add6SPer Liden * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer 629b97bf3fdSPer Liden * 6302ff9f924SAllan Stephens * Send packet over as many bearers as necessary to reach all nodes 6312ff9f924SAllan Stephens * that have joined the broadcast link. 632b97bf3fdSPer Liden * 6332ff9f924SAllan Stephens * Returns 0 (packet sent successfully) under all circumstances, 6342ff9f924SAllan Stephens * since the broadcast link's pseudo-bearer never blocks 635b97bf3fdSPer Liden */ 636ae8509c4SPaul Gortmaker static int tipc_bcbearer_send(struct sk_buff *buf, struct tipc_bearer *unused1, 637b97bf3fdSPer Liden struct tipc_media_addr *unused2) 638b97bf3fdSPer Liden { 639b97bf3fdSPer Liden int bp_index; 640b97bf3fdSPer Liden 641e6160710SGerlando Falauto /* Prepare broadcast link message for reliable transmission, 6422ff9f924SAllan Stephens * if first time trying to send it; 6432ff9f924SAllan Stephens * preparation is skipped for broadcast link protocol messages 6442ff9f924SAllan Stephens * since they are sent in an unreliable manner and don't need it 6452ff9f924SAllan Stephens */ 646b97bf3fdSPer Liden if (likely(!msg_non_seq(buf_msg(buf)))) { 647b97bf3fdSPer Liden struct tipc_msg *msg; 648b97bf3fdSPer Liden 649cd3decdfSAllan Stephens bcbuf_set_acks(buf, bclink->bcast_nodes.count); 650b97bf3fdSPer Liden msg = buf_msg(buf); 65140aecb1bSAllan Stephens msg_set_non_seq(msg, 1); 652b97bf3fdSPer Liden msg_set_mc_netid(msg, tipc_net_id); 6530048b826SAllan Stephens bcl->stats.sent_info++; 6545e726900SAllan Stephens 655cd3decdfSAllan Stephens if (WARN_ON(!bclink->bcast_nodes.count)) { 6565e726900SAllan Stephens dump_stack(); 6575e726900SAllan Stephens return 0; 6585e726900SAllan Stephens } 659b97bf3fdSPer Liden } 660b97bf3fdSPer Liden 661b97bf3fdSPer Liden /* Send buffer over bearers until all targets reached */ 662cd3decdfSAllan Stephens bcbearer->remains = bclink->bcast_nodes; 663b97bf3fdSPer Liden 664b97bf3fdSPer Liden for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { 6652d627b92SAllan Stephens struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary; 6662d627b92SAllan Stephens struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary; 66777861d9cSGerlando Falauto struct tipc_bearer *b = p; 668488fc9afSGerlando Falauto struct sk_buff *tbuf; 669b97bf3fdSPer Liden 670b97bf3fdSPer Liden if (!p) 671e6160710SGerlando Falauto break; /* No more bearers to try */ 672b97bf3fdSPer Liden 67377861d9cSGerlando Falauto tipc_nmap_diff(&bcbearer->remains, &b->nodes, 674e6160710SGerlando Falauto &bcbearer->remains_new); 67565f51ef0SAllan Stephens if (bcbearer->remains_new.count == bcbearer->remains.count) 676e6160710SGerlando Falauto continue; /* Nothing added by bearer pair */ 677b97bf3fdSPer Liden 678488fc9afSGerlando Falauto if (bp_index == 0) { 679488fc9afSGerlando Falauto /* Use original buffer for first bearer */ 6807a2f7d18SYing Xue tipc_bearer_send(b->identity, buf, &b->bcast_addr); 681488fc9afSGerlando Falauto } else { 682488fc9afSGerlando Falauto /* Avoid concurrent buffer access */ 683bad93e9dSOctavian Purdila tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC); 684488fc9afSGerlando Falauto if (!tbuf) 685488fc9afSGerlando Falauto break; 6867a2f7d18SYing Xue tipc_bearer_send(b->identity, tbuf, &b->bcast_addr); 687488fc9afSGerlando Falauto kfree_skb(tbuf); /* Bearer keeps a clone */ 688488fc9afSGerlando Falauto } 689b97bf3fdSPer Liden 690e6160710SGerlando Falauto /* Swap bearers for next packet */ 6911a624832SNeil Horman if (s) { 692b97bf3fdSPer Liden bcbearer->bpairs[bp_index].primary = s; 693b97bf3fdSPer Liden bcbearer->bpairs[bp_index].secondary = p; 6941a624832SNeil Horman } 6951a624832SNeil Horman 69665f51ef0SAllan Stephens if (bcbearer->remains_new.count == 0) 697e6160710SGerlando Falauto break; /* All targets reached */ 698b97bf3fdSPer Liden 69965f51ef0SAllan Stephens bcbearer->remains = bcbearer->remains_new; 700b97bf3fdSPer Liden } 701b97bf3fdSPer Liden 7022ff9f924SAllan Stephens return 0; 703b97bf3fdSPer Liden } 704b97bf3fdSPer Liden 705b97bf3fdSPer Liden /** 7064323add6SPer Liden * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer 707b97bf3fdSPer Liden */ 70828dd9418SYing Xue void tipc_bcbearer_sort(struct tipc_node_map *nm_ptr, u32 node, bool action) 709b97bf3fdSPer Liden { 7107f9ab6acSPaul Gortmaker struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp; 7117f9ab6acSPaul Gortmaker struct tipc_bcbearer_pair *bp_curr; 712f8322dfcSYing Xue struct tipc_bearer *b; 713b97bf3fdSPer Liden int b_index; 714b97bf3fdSPer Liden int pri; 715b97bf3fdSPer Liden 716d69afc90SYing Xue tipc_bclink_lock(); 717b97bf3fdSPer Liden 71828dd9418SYing Xue if (action) 71928dd9418SYing Xue tipc_nmap_add(nm_ptr, node); 72028dd9418SYing Xue else 72128dd9418SYing Xue tipc_nmap_remove(nm_ptr, node); 72228dd9418SYing Xue 723b97bf3fdSPer Liden /* Group bearers by priority (can assume max of two per priority) */ 724b97bf3fdSPer Liden memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); 725b97bf3fdSPer Liden 726f8322dfcSYing Xue rcu_read_lock(); 727b97bf3fdSPer Liden for (b_index = 0; b_index < MAX_BEARERS; b_index++) { 728f8322dfcSYing Xue b = rcu_dereference_rtnl(bearer_list[b_index]); 729f47de12bSYing Xue if (!b || !b->nodes.count) 730b97bf3fdSPer Liden continue; 731b97bf3fdSPer Liden 732b97bf3fdSPer Liden if (!bp_temp[b->priority].primary) 733b97bf3fdSPer Liden bp_temp[b->priority].primary = b; 734b97bf3fdSPer Liden else 735b97bf3fdSPer Liden bp_temp[b->priority].secondary = b; 736b97bf3fdSPer Liden } 737f8322dfcSYing Xue rcu_read_unlock(); 738b97bf3fdSPer Liden 739b97bf3fdSPer Liden /* Create array of bearer pairs for broadcasting */ 740b97bf3fdSPer Liden bp_curr = bcbearer->bpairs; 741b97bf3fdSPer Liden memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs)); 742b97bf3fdSPer Liden 74316cb4b33SPer Liden for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) { 744b97bf3fdSPer Liden 745b97bf3fdSPer Liden if (!bp_temp[pri].primary) 746b97bf3fdSPer Liden continue; 747b97bf3fdSPer Liden 748b97bf3fdSPer Liden bp_curr->primary = bp_temp[pri].primary; 749b97bf3fdSPer Liden 750b97bf3fdSPer Liden if (bp_temp[pri].secondary) { 7514323add6SPer Liden if (tipc_nmap_equal(&bp_temp[pri].primary->nodes, 752b97bf3fdSPer Liden &bp_temp[pri].secondary->nodes)) { 753b97bf3fdSPer Liden bp_curr->secondary = bp_temp[pri].secondary; 754b97bf3fdSPer Liden } else { 755b97bf3fdSPer Liden bp_curr++; 756b97bf3fdSPer Liden bp_curr->primary = bp_temp[pri].secondary; 757b97bf3fdSPer Liden } 758b97bf3fdSPer Liden } 759b97bf3fdSPer Liden 760b97bf3fdSPer Liden bp_curr++; 761b97bf3fdSPer Liden } 762b97bf3fdSPer Liden 763d69afc90SYing Xue tipc_bclink_unlock(); 764b97bf3fdSPer Liden } 765b97bf3fdSPer Liden 766b97bf3fdSPer Liden 7674323add6SPer Liden int tipc_bclink_stats(char *buf, const u32 buf_size) 768b97bf3fdSPer Liden { 769dc1aed37SErik Hugne int ret; 770dc1aed37SErik Hugne struct tipc_stats *s; 771b97bf3fdSPer Liden 772b97bf3fdSPer Liden if (!bcl) 773b97bf3fdSPer Liden return 0; 774b97bf3fdSPer Liden 775d69afc90SYing Xue tipc_bclink_lock(); 776b97bf3fdSPer Liden 777dc1aed37SErik Hugne s = &bcl->stats; 778dc1aed37SErik Hugne 779dc1aed37SErik Hugne ret = tipc_snprintf(buf, buf_size, "Link <%s>\n" 780b97bf3fdSPer Liden " Window:%u packets\n", 781b97bf3fdSPer Liden bcl->name, bcl->queue_limit[0]); 782dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 783dc1aed37SErik Hugne " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 784dc1aed37SErik Hugne s->recv_info, s->recv_fragments, 785dc1aed37SErik Hugne s->recv_fragmented, s->recv_bundles, 786dc1aed37SErik Hugne s->recv_bundled); 787dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 788dc1aed37SErik Hugne " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 789dc1aed37SErik Hugne s->sent_info, s->sent_fragments, 790dc1aed37SErik Hugne s->sent_fragmented, s->sent_bundles, 791dc1aed37SErik Hugne s->sent_bundled); 792dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 793dc1aed37SErik Hugne " RX naks:%u defs:%u dups:%u\n", 794dc1aed37SErik Hugne s->recv_nacks, s->deferred_recv, s->duplicates); 795dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 796dc1aed37SErik Hugne " TX naks:%u acks:%u dups:%u\n", 797dc1aed37SErik Hugne s->sent_nacks, s->sent_acks, s->retransmitted); 798dc1aed37SErik Hugne ret += tipc_snprintf(buf + ret, buf_size - ret, 7993c294cb3SYing Xue " Congestion link:%u Send queue max:%u avg:%u\n", 8003c294cb3SYing Xue s->link_congs, s->max_queue_sz, 801dc1aed37SErik Hugne s->queue_sz_counts ? 802dc1aed37SErik Hugne (s->accu_queue_sz / s->queue_sz_counts) : 0); 803b97bf3fdSPer Liden 804d69afc90SYing Xue tipc_bclink_unlock(); 805dc1aed37SErik Hugne return ret; 806b97bf3fdSPer Liden } 807b97bf3fdSPer Liden 8084323add6SPer Liden int tipc_bclink_reset_stats(void) 809b97bf3fdSPer Liden { 810b97bf3fdSPer Liden if (!bcl) 811b97bf3fdSPer Liden return -ENOPROTOOPT; 812b97bf3fdSPer Liden 813d69afc90SYing Xue tipc_bclink_lock(); 814b97bf3fdSPer Liden memset(&bcl->stats, 0, sizeof(bcl->stats)); 815d69afc90SYing Xue tipc_bclink_unlock(); 8160e35fd5eSAllan Stephens return 0; 817b97bf3fdSPer Liden } 818b97bf3fdSPer Liden 8194323add6SPer Liden int tipc_bclink_set_queue_limits(u32 limit) 820b97bf3fdSPer Liden { 821b97bf3fdSPer Liden if (!bcl) 822b97bf3fdSPer Liden return -ENOPROTOOPT; 823b97bf3fdSPer Liden if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN)) 824b97bf3fdSPer Liden return -EINVAL; 825b97bf3fdSPer Liden 826d69afc90SYing Xue tipc_bclink_lock(); 8274323add6SPer Liden tipc_link_set_queue_limits(bcl, limit); 828d69afc90SYing Xue tipc_bclink_unlock(); 8290e35fd5eSAllan Stephens return 0; 830b97bf3fdSPer Liden } 831b97bf3fdSPer Liden 832eb8b00f5SYing Xue int tipc_bclink_init(void) 833b97bf3fdSPer Liden { 834eb8b00f5SYing Xue bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); 835eb8b00f5SYing Xue if (!bcbearer) 836eb8b00f5SYing Xue return -ENOMEM; 837eb8b00f5SYing Xue 838eb8b00f5SYing Xue bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); 839eb8b00f5SYing Xue if (!bclink) { 840eb8b00f5SYing Xue kfree(bcbearer); 841eb8b00f5SYing Xue return -ENOMEM; 842eb8b00f5SYing Xue } 843eb8b00f5SYing Xue 844eb8b00f5SYing Xue bcl = &bclink->link; 845b97bf3fdSPer Liden bcbearer->bearer.media = &bcbearer->media; 8464323add6SPer Liden bcbearer->media.send_msg = tipc_bcbearer_send; 8472e2d9be8SAllan Stephens sprintf(bcbearer->media.name, "tipc-broadcast"); 848b97bf3fdSPer Liden 849d69afc90SYing Xue spin_lock_init(&bclink->lock); 850b97bf3fdSPer Liden INIT_LIST_HEAD(&bcl->waiting_ports); 851b97bf3fdSPer Liden bcl->next_out_no = 1; 85234af946aSIngo Molnar spin_lock_init(&bclink->node.lock); 853b97bf3fdSPer Liden bcl->owner = &bclink->node; 854b97bf3fdSPer Liden bcl->max_pkt = MAX_PKT_DEFAULT_MCAST; 8554323add6SPer Liden tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); 8567a2f7d18SYing Xue bcl->bearer_id = MAX_BEARERS; 857f8322dfcSYing Xue rcu_assign_pointer(bearer_list[MAX_BEARERS], &bcbearer->bearer); 858b97bf3fdSPer Liden bcl->state = WORKING_WORKING; 8594b704d59SStephen Hemminger strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); 860eb8b00f5SYing Xue return 0; 861b97bf3fdSPer Liden } 862b97bf3fdSPer Liden 8634323add6SPer Liden void tipc_bclink_stop(void) 864b97bf3fdSPer Liden { 865d69afc90SYing Xue tipc_bclink_lock(); 866581465faSJon Paul Maloy tipc_link_purge_queues(bcl); 867d69afc90SYing Xue tipc_bclink_unlock(); 868c47e9b91SAllan Stephens 869f8322dfcSYing Xue RCU_INIT_POINTER(bearer_list[BCBEARER], NULL); 870eb8b00f5SYing Xue synchronize_net(); 871eb8b00f5SYing Xue kfree(bcbearer); 872eb8b00f5SYing Xue kfree(bclink); 873b97bf3fdSPer Liden } 874b97bf3fdSPer Liden 8753e22e62bSAllan Stephens /** 8763e22e62bSAllan Stephens * tipc_nmap_add - add a node to a node map 8773e22e62bSAllan Stephens */ 87828dd9418SYing Xue static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node) 8793e22e62bSAllan Stephens { 8803e22e62bSAllan Stephens int n = tipc_node(node); 8813e22e62bSAllan Stephens int w = n / WSIZE; 8823e22e62bSAllan Stephens u32 mask = (1 << (n % WSIZE)); 8833e22e62bSAllan Stephens 8843e22e62bSAllan Stephens if ((nm_ptr->map[w] & mask) == 0) { 8853e22e62bSAllan Stephens nm_ptr->count++; 8863e22e62bSAllan Stephens nm_ptr->map[w] |= mask; 8873e22e62bSAllan Stephens } 8883e22e62bSAllan Stephens } 8893e22e62bSAllan Stephens 8903e22e62bSAllan Stephens /** 8913e22e62bSAllan Stephens * tipc_nmap_remove - remove a node from a node map 8923e22e62bSAllan Stephens */ 89328dd9418SYing Xue static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node) 8943e22e62bSAllan Stephens { 8953e22e62bSAllan Stephens int n = tipc_node(node); 8963e22e62bSAllan Stephens int w = n / WSIZE; 8973e22e62bSAllan Stephens u32 mask = (1 << (n % WSIZE)); 8983e22e62bSAllan Stephens 8993e22e62bSAllan Stephens if ((nm_ptr->map[w] & mask) != 0) { 9003e22e62bSAllan Stephens nm_ptr->map[w] &= ~mask; 9013e22e62bSAllan Stephens nm_ptr->count--; 9023e22e62bSAllan Stephens } 9033e22e62bSAllan Stephens } 9043e22e62bSAllan Stephens 9053e22e62bSAllan Stephens /** 9063e22e62bSAllan Stephens * tipc_nmap_diff - find differences between node maps 9073e22e62bSAllan Stephens * @nm_a: input node map A 9083e22e62bSAllan Stephens * @nm_b: input node map B 9093e22e62bSAllan Stephens * @nm_diff: output node map A-B (i.e. nodes of A that are not in B) 9103e22e62bSAllan Stephens */ 91131e3c3f6Sstephen hemminger static void tipc_nmap_diff(struct tipc_node_map *nm_a, 91231e3c3f6Sstephen hemminger struct tipc_node_map *nm_b, 9133e22e62bSAllan Stephens struct tipc_node_map *nm_diff) 9143e22e62bSAllan Stephens { 9153e22e62bSAllan Stephens int stop = ARRAY_SIZE(nm_a->map); 9163e22e62bSAllan Stephens int w; 9173e22e62bSAllan Stephens int b; 9183e22e62bSAllan Stephens u32 map; 9193e22e62bSAllan Stephens 9203e22e62bSAllan Stephens memset(nm_diff, 0, sizeof(*nm_diff)); 9213e22e62bSAllan Stephens for (w = 0; w < stop; w++) { 9223e22e62bSAllan Stephens map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]); 9233e22e62bSAllan Stephens nm_diff->map[w] = map; 9243e22e62bSAllan Stephens if (map != 0) { 9253e22e62bSAllan Stephens for (b = 0 ; b < WSIZE; b++) { 9263e22e62bSAllan Stephens if (map & (1 << b)) 9273e22e62bSAllan Stephens nm_diff->count++; 9283e22e62bSAllan Stephens } 9293e22e62bSAllan Stephens } 9303e22e62bSAllan Stephens } 9313e22e62bSAllan Stephens } 93243608edcSAllan Stephens 93343608edcSAllan Stephens /** 93443608edcSAllan Stephens * tipc_port_list_add - add a port to a port list, ensuring no duplicates 93543608edcSAllan Stephens */ 9364584310bSPaul Gortmaker void tipc_port_list_add(struct tipc_port_list *pl_ptr, u32 port) 93743608edcSAllan Stephens { 9384584310bSPaul Gortmaker struct tipc_port_list *item = pl_ptr; 93943608edcSAllan Stephens int i; 94043608edcSAllan Stephens int item_sz = PLSIZE; 94143608edcSAllan Stephens int cnt = pl_ptr->count; 94243608edcSAllan Stephens 94343608edcSAllan Stephens for (; ; cnt -= item_sz, item = item->next) { 94443608edcSAllan Stephens if (cnt < PLSIZE) 94543608edcSAllan Stephens item_sz = cnt; 94643608edcSAllan Stephens for (i = 0; i < item_sz; i++) 94743608edcSAllan Stephens if (item->ports[i] == port) 94843608edcSAllan Stephens return; 94943608edcSAllan Stephens if (i < PLSIZE) { 95043608edcSAllan Stephens item->ports[i] = port; 95143608edcSAllan Stephens pl_ptr->count++; 95243608edcSAllan Stephens return; 95343608edcSAllan Stephens } 95443608edcSAllan Stephens if (!item->next) { 95543608edcSAllan Stephens item->next = kmalloc(sizeof(*item), GFP_ATOMIC); 95643608edcSAllan Stephens if (!item->next) { 9572cf8aa19SErik Hugne pr_warn("Incomplete multicast delivery, no memory\n"); 95843608edcSAllan Stephens return; 95943608edcSAllan Stephens } 96043608edcSAllan Stephens item->next->next = NULL; 96143608edcSAllan Stephens } 96243608edcSAllan Stephens } 96343608edcSAllan Stephens } 96443608edcSAllan Stephens 96543608edcSAllan Stephens /** 96643608edcSAllan Stephens * tipc_port_list_free - free dynamically created entries in port_list chain 96743608edcSAllan Stephens * 96843608edcSAllan Stephens */ 9694584310bSPaul Gortmaker void tipc_port_list_free(struct tipc_port_list *pl_ptr) 97043608edcSAllan Stephens { 9714584310bSPaul Gortmaker struct tipc_port_list *item; 9724584310bSPaul Gortmaker struct tipc_port_list *next; 97343608edcSAllan Stephens 97443608edcSAllan Stephens for (item = pl_ptr->next; item; item = next) { 97543608edcSAllan Stephens next = item->next; 97643608edcSAllan Stephens kfree(item); 97743608edcSAllan Stephens } 97843608edcSAllan Stephens } 979