Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/bcast.c: TIPC broadcast code |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 4 | * Copyright (c) 2004-2006, 2014, Ericsson AB |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 5 | * Copyright (c) 2004, Intel Corporation. |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 6 | * Copyright (c) 2005, 2010-2011, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 7 | * All rights reserved. |
| 8 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 9 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 10 | * modification, are permitted provided that the following conditions are met: |
| 11 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the names of the copyright holders nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived from |
| 19 | * this software without specific prior written permission. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 20 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 21 | * Alternatively, this software may be distributed under the terms of the |
| 22 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 23 | * Software Foundation. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 35 | * POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | #include "core.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "link.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 40 | #include "port.h" |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 41 | #include "socket.h" |
| 42 | #include "msg.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 43 | #include "bcast.h" |
Allan Stephens | 9f6bdcd4 | 2011-04-07 14:57:53 -0400 | [diff] [blame] | 44 | #include "name_distr.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | |
Ying Xue | 987b58b | 2014-03-27 12:54:35 +0800 | [diff] [blame] | 46 | #define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */ |
| 47 | #define BCLINK_WIN_DEFAULT 20 /* bcast link window size (default) */ |
| 48 | #define BCBEARER MAX_BEARERS |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 49 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 50 | /** |
Paul Gortmaker | 7f9ab6a | 2011-12-29 20:55:27 -0500 | [diff] [blame] | 51 | * struct tipc_bcbearer_pair - a pair of bearers used by broadcast link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 52 | * @primary: pointer to primary bearer |
| 53 | * @secondary: pointer to secondary bearer |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 54 | * |
| 55 | * Bearers must have same priority and same set of reachable destinations |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 56 | * to be paired. |
| 57 | */ |
| 58 | |
Paul Gortmaker | 7f9ab6a | 2011-12-29 20:55:27 -0500 | [diff] [blame] | 59 | struct tipc_bcbearer_pair { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 60 | struct tipc_bearer *primary; |
| 61 | struct tipc_bearer *secondary; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 62 | }; |
| 63 | |
| 64 | /** |
Paul Gortmaker | 7f9ab6a | 2011-12-29 20:55:27 -0500 | [diff] [blame] | 65 | * struct tipc_bcbearer - bearer used by broadcast link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 66 | * @bearer: (non-standard) broadcast bearer structure |
| 67 | * @media: (non-standard) broadcast media structure |
| 68 | * @bpairs: array of bearer pairs |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 69 | * @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort() |
| 70 | * @remains: temporary node map used by tipc_bcbearer_send() |
| 71 | * @remains_new: temporary node map used tipc_bcbearer_send() |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 72 | * |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 73 | * Note: The fields labelled "temporary" are incorporated into the bearer |
| 74 | * to avoid consuming potentially limited stack space through the use of |
| 75 | * large local variables within multicast routines. Concurrent access is |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 76 | * prevented through use of the spinlock "bclink_lock". |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 77 | */ |
Paul Gortmaker | 7f9ab6a | 2011-12-29 20:55:27 -0500 | [diff] [blame] | 78 | struct tipc_bcbearer { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 79 | struct tipc_bearer bearer; |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 80 | struct tipc_media media; |
Paul Gortmaker | 7f9ab6a | 2011-12-29 20:55:27 -0500 | [diff] [blame] | 81 | struct tipc_bcbearer_pair bpairs[MAX_BEARERS]; |
| 82 | struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1]; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 83 | struct tipc_node_map remains; |
| 84 | struct tipc_node_map remains_new; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | /** |
Paul Gortmaker | 6765fd6 | 2011-12-29 20:52:18 -0500 | [diff] [blame] | 88 | * struct tipc_bclink - link used for broadcast messages |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 89 | * @lock: spinlock governing access to structure |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 90 | * @link: (non-standard) broadcast link structure |
| 91 | * @node: (non-standard) node structure representing b'cast link's peer node |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 92 | * @flags: represent bclink states |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 93 | * @bcast_nodes: map of broadcast-capable nodes |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 94 | * @retransmit_to: node that most recently requested a retransmit |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 95 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 96 | * Handles sequence numbering, fragmentation, bundling, etc. |
| 97 | */ |
Paul Gortmaker | 6765fd6 | 2011-12-29 20:52:18 -0500 | [diff] [blame] | 98 | struct tipc_bclink { |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 99 | spinlock_t lock; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 100 | struct tipc_link link; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 101 | struct tipc_node node; |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 102 | unsigned int flags; |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 103 | struct tipc_node_map bcast_nodes; |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 104 | struct tipc_node *retransmit_to; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 105 | }; |
| 106 | |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 107 | static struct tipc_bcbearer *bcbearer; |
| 108 | static struct tipc_bclink *bclink; |
| 109 | static struct tipc_link *bcl; |
Allan Stephens | c47e9b9 | 2011-10-24 10:29:26 -0400 | [diff] [blame] | 110 | |
Allan Stephens | 3aec9cc | 2010-05-11 14:30:07 +0000 | [diff] [blame] | 111 | const char tipc_bclink_name[] = "broadcast-link"; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 112 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 113 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
| 114 | struct tipc_node_map *nm_b, |
| 115 | struct tipc_node_map *nm_diff); |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 116 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node); |
| 117 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 118 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 119 | static void tipc_bclink_lock(void) |
| 120 | { |
| 121 | spin_lock_bh(&bclink->lock); |
| 122 | } |
| 123 | |
| 124 | static void tipc_bclink_unlock(void) |
| 125 | { |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 126 | struct tipc_node *node = NULL; |
| 127 | |
| 128 | if (likely(!bclink->flags)) { |
| 129 | spin_unlock_bh(&bclink->lock); |
| 130 | return; |
| 131 | } |
| 132 | |
| 133 | if (bclink->flags & TIPC_BCLINK_RESET) { |
| 134 | bclink->flags &= ~TIPC_BCLINK_RESET; |
| 135 | node = tipc_bclink_retransmit_to(); |
| 136 | } |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 137 | spin_unlock_bh(&bclink->lock); |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 138 | |
| 139 | if (node) |
| 140 | tipc_link_reset_all(node); |
| 141 | } |
| 142 | |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 143 | uint tipc_bclink_get_mtu(void) |
| 144 | { |
| 145 | return MAX_PKT_DEFAULT_MCAST; |
| 146 | } |
| 147 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 148 | void tipc_bclink_set_flags(unsigned int flags) |
| 149 | { |
| 150 | bclink->flags |= flags; |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 151 | } |
| 152 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 153 | static u32 bcbuf_acks(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 154 | { |
David S. Miller | 880b005 | 2006-01-12 13:22:32 -0800 | [diff] [blame] | 155 | return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 156 | } |
| 157 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 158 | static void bcbuf_set_acks(struct sk_buff *buf, u32 acks) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 159 | { |
David S. Miller | 880b005 | 2006-01-12 13:22:32 -0800 | [diff] [blame] | 160 | TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 161 | } |
| 162 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 163 | static void bcbuf_decr_acks(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 164 | { |
| 165 | bcbuf_set_acks(buf, bcbuf_acks(buf) - 1); |
| 166 | } |
| 167 | |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 168 | void tipc_bclink_add_node(u32 addr) |
| 169 | { |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 170 | tipc_bclink_lock(); |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 171 | tipc_nmap_add(&bclink->bcast_nodes, addr); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 172 | tipc_bclink_unlock(); |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | void tipc_bclink_remove_node(u32 addr) |
| 176 | { |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 177 | tipc_bclink_lock(); |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 178 | tipc_nmap_remove(&bclink->bcast_nodes, addr); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 179 | tipc_bclink_unlock(); |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 180 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 181 | |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 182 | static void bclink_set_last_sent(void) |
| 183 | { |
| 184 | if (bcl->next_out) |
| 185 | bcl->fsm_msg_cnt = mod(buf_seqno(bcl->next_out) - 1); |
| 186 | else |
| 187 | bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1); |
| 188 | } |
| 189 | |
| 190 | u32 tipc_bclink_get_last_sent(void) |
| 191 | { |
| 192 | return bcl->fsm_msg_cnt; |
| 193 | } |
| 194 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 195 | static void bclink_update_last_sent(struct tipc_node *node, u32 seqno) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 196 | { |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 197 | node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ? |
| 198 | seqno : node->bclink.last_sent; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 202 | /** |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 203 | * tipc_bclink_retransmit_to - get most recent node to request retransmission |
| 204 | * |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 205 | * Called with bclink_lock locked |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 206 | */ |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 207 | struct tipc_node *tipc_bclink_retransmit_to(void) |
| 208 | { |
| 209 | return bclink->retransmit_to; |
| 210 | } |
| 211 | |
| 212 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 213 | * bclink_retransmit_pkt - retransmit broadcast packets |
| 214 | * @after: sequence number of last packet to *not* retransmit |
| 215 | * @to: sequence number of last packet to retransmit |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 216 | * |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 217 | * Called with bclink_lock locked |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 218 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 219 | static void bclink_retransmit_pkt(u32 after, u32 to) |
| 220 | { |
| 221 | struct sk_buff *buf; |
| 222 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 223 | buf = bcl->first_out; |
Allan Stephens | a016892 | 2010-12-31 18:59:35 +0000 | [diff] [blame] | 224 | while (buf && less_eq(buf_seqno(buf), after)) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 225 | buf = buf->next; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 226 | tipc_link_retransmit(bcl, buf, mod(to - after)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 227 | } |
| 228 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 229 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 230 | * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 231 | * @n_ptr: node that sent acknowledgement info |
| 232 | * @acked: broadcast sequence # that has been acknowledged |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 233 | * |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 234 | * Node is locked, bclink_lock unlocked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 235 | */ |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 236 | void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 237 | { |
| 238 | struct sk_buff *crs; |
| 239 | struct sk_buff *next; |
| 240 | unsigned int released = 0; |
| 241 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 242 | tipc_bclink_lock(); |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 243 | /* Bail out if tx queue is empty (no clean up is required) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 244 | crs = bcl->first_out; |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 245 | if (!crs) |
| 246 | goto exit; |
| 247 | |
| 248 | /* Determine which messages need to be acknowledged */ |
| 249 | if (acked == INVALID_LINK_SEQ) { |
| 250 | /* |
| 251 | * Contact with specified node has been lost, so need to |
| 252 | * acknowledge sent messages only (if other nodes still exist) |
| 253 | * or both sent and unsent messages (otherwise) |
| 254 | */ |
| 255 | if (bclink->bcast_nodes.count) |
| 256 | acked = bcl->fsm_msg_cnt; |
| 257 | else |
| 258 | acked = bcl->next_out_no; |
| 259 | } else { |
| 260 | /* |
| 261 | * Bail out if specified sequence number does not correspond |
| 262 | * to a message that has been sent and not yet acknowledged |
| 263 | */ |
| 264 | if (less(acked, buf_seqno(crs)) || |
| 265 | less(bcl->fsm_msg_cnt, acked) || |
| 266 | less_eq(acked, n_ptr->bclink.acked)) |
| 267 | goto exit; |
| 268 | } |
| 269 | |
| 270 | /* Skip over packets that node has previously acknowledged */ |
Allan Stephens | a016892 | 2010-12-31 18:59:35 +0000 | [diff] [blame] | 271 | while (crs && less_eq(buf_seqno(crs), n_ptr->bclink.acked)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 272 | crs = crs->next; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 273 | |
| 274 | /* Update packets that node is now acknowledging */ |
| 275 | |
| 276 | while (crs && less_eq(buf_seqno(crs), acked)) { |
| 277 | next = crs->next; |
Allan Stephens | 10745cd | 2011-10-24 14:59:20 -0400 | [diff] [blame] | 278 | |
| 279 | if (crs != bcl->next_out) |
| 280 | bcbuf_decr_acks(crs); |
Allan Stephens | 10745cd | 2011-10-24 14:59:20 -0400 | [diff] [blame] | 281 | else { |
| 282 | bcbuf_set_acks(crs, 0); |
| 283 | bcl->next_out = next; |
| 284 | bclink_set_last_sent(); |
| 285 | } |
| 286 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 287 | if (bcbuf_acks(crs) == 0) { |
| 288 | bcl->first_out = next; |
| 289 | bcl->out_queue_size--; |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 290 | kfree_skb(crs); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 291 | released = 1; |
| 292 | } |
| 293 | crs = next; |
| 294 | } |
| 295 | n_ptr->bclink.acked = acked; |
| 296 | |
| 297 | /* Try resolving broadcast link congestion, if necessary */ |
| 298 | |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 299 | if (unlikely(bcl->next_out)) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 300 | tipc_link_push_queue(bcl); |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 301 | bclink_set_last_sent(); |
| 302 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 303 | if (unlikely(released && !list_empty(&bcl->waiting_ports))) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 304 | tipc_link_wakeup_ports(bcl, 0); |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 305 | exit: |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 306 | tipc_bclink_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 307 | } |
| 308 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 309 | /** |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 310 | * tipc_bclink_update_link_state - update broadcast link state |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 311 | * |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 312 | * RCU and node lock set |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 313 | */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 314 | void tipc_bclink_update_link_state(struct tipc_node *n_ptr, u32 last_sent) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 315 | { |
| 316 | struct sk_buff *buf; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 317 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 318 | /* Ignore "stale" link state info */ |
| 319 | |
| 320 | if (less_eq(last_sent, n_ptr->bclink.last_in)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 321 | return; |
| 322 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 323 | /* Update link synchronization state; quit if in sync */ |
| 324 | |
| 325 | bclink_update_last_sent(n_ptr, last_sent); |
| 326 | |
| 327 | if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in) |
| 328 | return; |
| 329 | |
| 330 | /* Update out-of-sync state; quit if loss is still unconfirmed */ |
| 331 | |
| 332 | if ((++n_ptr->bclink.oos_state) == 1) { |
| 333 | if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2)) |
| 334 | return; |
| 335 | n_ptr->bclink.oos_state++; |
| 336 | } |
| 337 | |
| 338 | /* Don't NACK if one has been recently sent (or seen) */ |
| 339 | |
| 340 | if (n_ptr->bclink.oos_state & 0x1) |
| 341 | return; |
| 342 | |
| 343 | /* Send NACK */ |
| 344 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 345 | buf = tipc_buf_acquire(INT_H_SIZE); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 346 | if (buf) { |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 347 | struct tipc_msg *msg = buf_msg(buf); |
| 348 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 349 | tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG, |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 350 | INT_H_SIZE, n_ptr->addr); |
Allan Stephens | bf781ec | 2011-01-25 16:12:39 -0500 | [diff] [blame] | 351 | msg_set_non_seq(msg, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 352 | msg_set_mc_netid(msg, tipc_net_id); |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 353 | msg_set_bcast_ack(msg, n_ptr->bclink.last_in); |
| 354 | msg_set_bcgap_after(msg, n_ptr->bclink.last_in); |
| 355 | msg_set_bcgap_to(msg, n_ptr->bclink.deferred_head |
| 356 | ? buf_seqno(n_ptr->bclink.deferred_head) - 1 |
| 357 | : n_ptr->bclink.last_sent); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 358 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 359 | tipc_bclink_lock(); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 360 | tipc_bearer_send(MAX_BEARERS, buf, NULL); |
Allan Stephens | 0f38513 | 2011-04-07 15:47:48 -0400 | [diff] [blame] | 361 | bcl->stats.sent_nacks++; |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 362 | tipc_bclink_unlock(); |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 363 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 364 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 365 | n_ptr->bclink.oos_state++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 366 | } |
| 367 | } |
| 368 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 369 | /** |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 370 | * bclink_peek_nack - monitor retransmission requests sent by other nodes |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 371 | * |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 372 | * Delay any upcoming NACK by this node if another node has already |
| 373 | * requested the first message this node is going to ask for. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 374 | */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 375 | static void bclink_peek_nack(struct tipc_msg *msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 376 | { |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 377 | struct tipc_node *n_ptr = tipc_node_find(msg_destnode(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 378 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 379 | if (unlikely(!n_ptr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 380 | return; |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 381 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 382 | tipc_node_lock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 383 | |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 384 | if (n_ptr->bclink.recv_permitted && |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 385 | (n_ptr->bclink.last_in != n_ptr->bclink.last_sent) && |
| 386 | (n_ptr->bclink.last_in == msg_bcgap_after(msg))) |
| 387 | n_ptr->bclink.oos_state = 2; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 388 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 389 | tipc_node_unlock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 390 | } |
| 391 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 392 | /* |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 393 | * tipc_bclink_xmit - broadcast a packet to all nodes in cluster |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 394 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 395 | int tipc_bclink_xmit(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 396 | { |
| 397 | int res; |
| 398 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 399 | tipc_bclink_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 400 | |
Allan Stephens | 2b78f9a | 2011-10-24 13:05:55 -0400 | [diff] [blame] | 401 | if (!bclink->bcast_nodes.count) { |
| 402 | res = msg_data_sz(buf_msg(buf)); |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 403 | kfree_skb(buf); |
Allan Stephens | 2b78f9a | 2011-10-24 13:05:55 -0400 | [diff] [blame] | 404 | goto exit; |
| 405 | } |
| 406 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 407 | res = __tipc_link_xmit(bcl, buf); |
Allan Stephens | 9157baf | 2011-10-24 13:27:31 -0400 | [diff] [blame] | 408 | if (likely(res >= 0)) { |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 409 | bclink_set_last_sent(); |
Allan Stephens | 9157baf | 2011-10-24 13:27:31 -0400 | [diff] [blame] | 410 | bcl->stats.queue_sz_counts++; |
| 411 | bcl->stats.accu_queue_sz += bcl->out_queue_size; |
| 412 | } |
Allan Stephens | 2b78f9a | 2011-10-24 13:05:55 -0400 | [diff] [blame] | 413 | exit: |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 414 | tipc_bclink_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 415 | return res; |
| 416 | } |
| 417 | |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 418 | /* tipc_bclink_xmit2 - broadcast buffer chain to all nodes in cluster |
| 419 | * and to identified node local sockets |
| 420 | * @buf: chain of buffers containing message |
| 421 | * Consumes the buffer chain, except when returning -ELINKCONG |
| 422 | * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE |
| 423 | */ |
| 424 | int tipc_bclink_xmit2(struct sk_buff *buf) |
| 425 | { |
| 426 | int rc = 0; |
| 427 | int bc = 0; |
| 428 | struct sk_buff *clbuf; |
| 429 | |
| 430 | /* Prepare clone of message for local node */ |
| 431 | clbuf = tipc_msg_reassemble(buf); |
| 432 | if (unlikely(!clbuf)) { |
| 433 | kfree_skb_list(buf); |
| 434 | return -EHOSTUNREACH; |
| 435 | } |
| 436 | |
| 437 | /* Broadcast to all other nodes */ |
| 438 | if (likely(bclink)) { |
| 439 | tipc_bclink_lock(); |
| 440 | if (likely(bclink->bcast_nodes.count)) { |
| 441 | rc = __tipc_link_xmit(bcl, buf); |
| 442 | if (likely(!rc)) { |
| 443 | bclink_set_last_sent(); |
| 444 | bcl->stats.queue_sz_counts++; |
| 445 | bcl->stats.accu_queue_sz += bcl->out_queue_size; |
| 446 | } |
| 447 | bc = 1; |
| 448 | } |
| 449 | tipc_bclink_unlock(); |
| 450 | } |
| 451 | |
| 452 | if (unlikely(!bc)) |
| 453 | kfree_skb_list(buf); |
| 454 | |
| 455 | /* Deliver message clone */ |
| 456 | if (likely(!rc)) |
| 457 | tipc_sk_mcast_rcv(clbuf); |
| 458 | else |
| 459 | kfree_skb(clbuf); |
| 460 | |
| 461 | return rc; |
| 462 | } |
| 463 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 464 | /** |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 465 | * bclink_accept_pkt - accept an incoming, in-sequence broadcast packet |
| 466 | * |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 467 | * Called with both sending node's lock and bclink_lock taken. |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 468 | */ |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 469 | static void bclink_accept_pkt(struct tipc_node *node, u32 seqno) |
| 470 | { |
| 471 | bclink_update_last_sent(node, seqno); |
| 472 | node->bclink.last_in = seqno; |
| 473 | node->bclink.oos_state = 0; |
| 474 | bcl->stats.recv_info++; |
| 475 | |
| 476 | /* |
| 477 | * Unicast an ACK periodically, ensuring that |
| 478 | * all nodes in the cluster don't ACK at the same time |
| 479 | */ |
| 480 | |
| 481 | if (((seqno - tipc_own_addr) % TIPC_MIN_LINK_WIN) == 0) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 482 | tipc_link_proto_xmit(node->active_links[node->addr & 1], |
| 483 | STATE_MSG, 0, 0, 0, 0, 0); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 484 | bcl->stats.sent_acks++; |
| 485 | } |
| 486 | } |
| 487 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 488 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 489 | * tipc_bclink_rcv - receive a broadcast packet, and deliver upwards |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 490 | * |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 491 | * RCU is locked, no other locks set |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 492 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 493 | void tipc_bclink_rcv(struct sk_buff *buf) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 494 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 495 | struct tipc_msg *msg = buf_msg(buf); |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 496 | struct tipc_node *node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 497 | u32 next_in; |
| 498 | u32 seqno; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame^] | 499 | int deferred = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 500 | |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 501 | /* Screen out unwanted broadcast messages */ |
| 502 | |
| 503 | if (msg_mc_netid(msg) != tipc_net_id) |
| 504 | goto exit; |
| 505 | |
| 506 | node = tipc_node_find(msg_prevnode(msg)); |
| 507 | if (unlikely(!node)) |
| 508 | goto exit; |
| 509 | |
| 510 | tipc_node_lock(node); |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 511 | if (unlikely(!node->bclink.recv_permitted)) |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 512 | goto unlock; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 513 | |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 514 | /* Handle broadcast protocol message */ |
| 515 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 516 | if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) { |
Allan Stephens | 9f6bdcd4 | 2011-04-07 14:57:53 -0400 | [diff] [blame] | 517 | if (msg_type(msg) != STATE_MSG) |
| 518 | goto unlock; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 519 | if (msg_destnode(msg) == tipc_own_addr) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 520 | tipc_bclink_acknowledge(node, msg_bcast_ack(msg)); |
| 521 | tipc_node_unlock(node); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 522 | tipc_bclink_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 523 | bcl->stats.recv_nacks++; |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 524 | bclink->retransmit_to = node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 525 | bclink_retransmit_pkt(msg_bcgap_after(msg), |
| 526 | msg_bcgap_to(msg)); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 527 | tipc_bclink_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 528 | } else { |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 529 | tipc_node_unlock(node); |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 530 | bclink_peek_nack(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 531 | } |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 532 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 533 | } |
| 534 | |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 535 | /* Handle in-sequence broadcast message */ |
| 536 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 537 | seqno = msg_seqno(msg); |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 538 | next_in = mod(node->bclink.last_in + 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 539 | |
| 540 | if (likely(seqno == next_in)) { |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 541 | receive: |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 542 | /* Deliver message to destination */ |
| 543 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 544 | if (likely(msg_isdata(msg))) { |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 545 | tipc_bclink_lock(); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 546 | bclink_accept_pkt(node, seqno); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 547 | tipc_bclink_unlock(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 548 | tipc_node_unlock(node); |
Allan Stephens | 9f6bdcd4 | 2011-04-07 14:57:53 -0400 | [diff] [blame] | 549 | if (likely(msg_mcast(msg))) |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame^] | 550 | tipc_sk_mcast_rcv(buf); |
Allan Stephens | 9f6bdcd4 | 2011-04-07 14:57:53 -0400 | [diff] [blame] | 551 | else |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 552 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 553 | } else if (msg_user(msg) == MSG_BUNDLER) { |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 554 | tipc_bclink_lock(); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 555 | bclink_accept_pkt(node, seqno); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 556 | bcl->stats.recv_bundles++; |
| 557 | bcl->stats.recv_bundled += msg_msgcnt(msg); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 558 | tipc_bclink_unlock(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 559 | tipc_node_unlock(node); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 560 | tipc_link_bundle_rcv(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 561 | } else if (msg_user(msg) == MSG_FRAGMENTER) { |
Jon Paul Maloy | 37e2216 | 2014-05-14 05:39:12 -0400 | [diff] [blame] | 562 | tipc_buf_append(&node->bclink.reasm_buf, &buf); |
| 563 | if (unlikely(!buf && !node->bclink.reasm_buf)) |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 564 | goto unlock; |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 565 | tipc_bclink_lock(); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 566 | bclink_accept_pkt(node, seqno); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 567 | bcl->stats.recv_fragments++; |
Jon Paul Maloy | 37e2216 | 2014-05-14 05:39:12 -0400 | [diff] [blame] | 568 | if (buf) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 569 | bcl->stats.recv_fragmented++; |
Erik Hugne | 40ba3cd | 2013-11-06 09:28:06 +0100 | [diff] [blame] | 570 | msg = buf_msg(buf); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 571 | tipc_bclink_unlock(); |
Erik Hugne | 528f6f4 | 2013-11-06 09:28:05 +0100 | [diff] [blame] | 572 | goto receive; |
| 573 | } |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 574 | tipc_bclink_unlock(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 575 | tipc_node_unlock(node); |
Allan Stephens | 9f6bdcd4 | 2011-04-07 14:57:53 -0400 | [diff] [blame] | 576 | } else if (msg_user(msg) == NAME_DISTRIBUTOR) { |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 577 | tipc_bclink_lock(); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 578 | bclink_accept_pkt(node, seqno); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 579 | tipc_bclink_unlock(); |
Allan Stephens | 9f6bdcd4 | 2011-04-07 14:57:53 -0400 | [diff] [blame] | 580 | tipc_node_unlock(node); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 581 | tipc_named_rcv(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 582 | } else { |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 583 | tipc_bclink_lock(); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 584 | bclink_accept_pkt(node, seqno); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 585 | tipc_bclink_unlock(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 586 | tipc_node_unlock(node); |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 587 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 588 | } |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 589 | buf = NULL; |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 590 | |
| 591 | /* Determine new synchronization state */ |
| 592 | |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 593 | tipc_node_lock(node); |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 594 | if (unlikely(!tipc_node_is_up(node))) |
| 595 | goto unlock; |
| 596 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 597 | if (node->bclink.last_in == node->bclink.last_sent) |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 598 | goto unlock; |
| 599 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 600 | if (!node->bclink.deferred_head) { |
| 601 | node->bclink.oos_state = 1; |
| 602 | goto unlock; |
| 603 | } |
| 604 | |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 605 | msg = buf_msg(node->bclink.deferred_head); |
| 606 | seqno = msg_seqno(msg); |
| 607 | next_in = mod(next_in + 1); |
| 608 | if (seqno != next_in) |
| 609 | goto unlock; |
| 610 | |
| 611 | /* Take in-sequence message from deferred queue & deliver it */ |
| 612 | |
| 613 | buf = node->bclink.deferred_head; |
| 614 | node->bclink.deferred_head = buf->next; |
Jon Paul Maloy | 9994175 | 2014-07-11 08:45:27 -0400 | [diff] [blame] | 615 | buf->next = NULL; |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 616 | node->bclink.deferred_size--; |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 617 | goto receive; |
| 618 | } |
| 619 | |
| 620 | /* Handle out-of-sequence broadcast message */ |
| 621 | |
| 622 | if (less(next_in, seqno)) { |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 623 | deferred = tipc_link_defer_pkt(&node->bclink.deferred_head, |
| 624 | &node->bclink.deferred_tail, |
| 625 | buf); |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 626 | node->bclink.deferred_size += deferred; |
| 627 | bclink_update_last_sent(node, seqno); |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 628 | buf = NULL; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame^] | 629 | } |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 630 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 631 | tipc_bclink_lock(); |
Allan Stephens | b98158e | 2011-10-26 16:13:35 -0400 | [diff] [blame] | 632 | |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 633 | if (deferred) |
| 634 | bcl->stats.deferred_recv++; |
Allan Stephens | 0232c5a | 2011-10-26 15:57:26 -0400 | [diff] [blame] | 635 | else |
| 636 | bcl->stats.duplicates++; |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 637 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 638 | tipc_bclink_unlock(); |
Allan Stephens | b98158e | 2011-10-26 16:13:35 -0400 | [diff] [blame] | 639 | |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 640 | unlock: |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 641 | tipc_node_unlock(node); |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 642 | exit: |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 643 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 644 | } |
| 645 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 646 | u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 647 | { |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 648 | return (n_ptr->bclink.recv_permitted && |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 649 | (tipc_bclink_get_last_sent() != n_ptr->bclink.acked)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 650 | } |
| 651 | |
| 652 | |
| 653 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 654 | * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 655 | * |
Allan Stephens | 2ff9f92 | 2011-04-07 10:44:54 -0400 | [diff] [blame] | 656 | * Send packet over as many bearers as necessary to reach all nodes |
| 657 | * that have joined the broadcast link. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 658 | * |
Allan Stephens | 2ff9f92 | 2011-04-07 10:44:54 -0400 | [diff] [blame] | 659 | * Returns 0 (packet sent successfully) under all circumstances, |
| 660 | * since the broadcast link's pseudo-bearer never blocks |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 661 | */ |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 662 | static int tipc_bcbearer_send(struct sk_buff *buf, struct tipc_bearer *unused1, |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 663 | struct tipc_media_addr *unused2) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 664 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 665 | int bp_index; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 666 | |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 667 | /* Prepare broadcast link message for reliable transmission, |
Allan Stephens | 2ff9f92 | 2011-04-07 10:44:54 -0400 | [diff] [blame] | 668 | * if first time trying to send it; |
| 669 | * preparation is skipped for broadcast link protocol messages |
| 670 | * since they are sent in an unreliable manner and don't need it |
| 671 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 672 | if (likely(!msg_non_seq(buf_msg(buf)))) { |
| 673 | struct tipc_msg *msg; |
| 674 | |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 675 | bcbuf_set_acks(buf, bclink->bcast_nodes.count); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 676 | msg = buf_msg(buf); |
Allan Stephens | 40aecb1 | 2008-06-04 17:54:48 -0700 | [diff] [blame] | 677 | msg_set_non_seq(msg, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 678 | msg_set_mc_netid(msg, tipc_net_id); |
Allan Stephens | 0048b82 | 2010-08-17 11:00:10 +0000 | [diff] [blame] | 679 | bcl->stats.sent_info++; |
Allan Stephens | 5e72690 | 2011-05-23 13:14:18 -0400 | [diff] [blame] | 680 | |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 681 | if (WARN_ON(!bclink->bcast_nodes.count)) { |
Allan Stephens | 5e72690 | 2011-05-23 13:14:18 -0400 | [diff] [blame] | 682 | dump_stack(); |
| 683 | return 0; |
| 684 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 685 | } |
| 686 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 687 | /* Send buffer over bearers until all targets reached */ |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 688 | bcbearer->remains = bclink->bcast_nodes; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 689 | |
| 690 | for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 691 | struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary; |
| 692 | struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary; |
Gerlando Falauto | 77861d9 | 2013-05-01 12:04:45 +0000 | [diff] [blame] | 693 | struct tipc_bearer *b = p; |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 694 | struct sk_buff *tbuf; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 695 | |
| 696 | if (!p) |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 697 | break; /* No more bearers to try */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 698 | |
Gerlando Falauto | 77861d9 | 2013-05-01 12:04:45 +0000 | [diff] [blame] | 699 | tipc_nmap_diff(&bcbearer->remains, &b->nodes, |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 700 | &bcbearer->remains_new); |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 701 | if (bcbearer->remains_new.count == bcbearer->remains.count) |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 702 | continue; /* Nothing added by bearer pair */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 703 | |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 704 | if (bp_index == 0) { |
| 705 | /* Use original buffer for first bearer */ |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 706 | tipc_bearer_send(b->identity, buf, &b->bcast_addr); |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 707 | } else { |
| 708 | /* Avoid concurrent buffer access */ |
Octavian Purdila | bad93e9 | 2014-06-12 01:36:26 +0300 | [diff] [blame] | 709 | tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC); |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 710 | if (!tbuf) |
| 711 | break; |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 712 | tipc_bearer_send(b->identity, tbuf, &b->bcast_addr); |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 713 | kfree_skb(tbuf); /* Bearer keeps a clone */ |
| 714 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 715 | |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 716 | /* Swap bearers for next packet */ |
Neil Horman | 1a62483 | 2010-03-15 08:02:24 +0000 | [diff] [blame] | 717 | if (s) { |
| 718 | bcbearer->bpairs[bp_index].primary = s; |
| 719 | bcbearer->bpairs[bp_index].secondary = p; |
| 720 | } |
| 721 | |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 722 | if (bcbearer->remains_new.count == 0) |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 723 | break; /* All targets reached */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 724 | |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 725 | bcbearer->remains = bcbearer->remains_new; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 726 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 727 | |
Allan Stephens | 2ff9f92 | 2011-04-07 10:44:54 -0400 | [diff] [blame] | 728 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 732 | * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 733 | */ |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 734 | void tipc_bcbearer_sort(struct tipc_node_map *nm_ptr, u32 node, bool action) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 735 | { |
Paul Gortmaker | 7f9ab6a | 2011-12-29 20:55:27 -0500 | [diff] [blame] | 736 | struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp; |
| 737 | struct tipc_bcbearer_pair *bp_curr; |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 738 | struct tipc_bearer *b; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 739 | int b_index; |
| 740 | int pri; |
| 741 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 742 | tipc_bclink_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 743 | |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 744 | if (action) |
| 745 | tipc_nmap_add(nm_ptr, node); |
| 746 | else |
| 747 | tipc_nmap_remove(nm_ptr, node); |
| 748 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 749 | /* Group bearers by priority (can assume max of two per priority) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 750 | memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); |
| 751 | |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 752 | rcu_read_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 753 | for (b_index = 0; b_index < MAX_BEARERS; b_index++) { |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 754 | b = rcu_dereference_rtnl(bearer_list[b_index]); |
Ying Xue | f47de12 | 2014-03-27 12:54:34 +0800 | [diff] [blame] | 755 | if (!b || !b->nodes.count) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 756 | continue; |
| 757 | |
| 758 | if (!bp_temp[b->priority].primary) |
| 759 | bp_temp[b->priority].primary = b; |
| 760 | else |
| 761 | bp_temp[b->priority].secondary = b; |
| 762 | } |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 763 | rcu_read_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 764 | |
| 765 | /* Create array of bearer pairs for broadcasting */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 766 | bp_curr = bcbearer->bpairs; |
| 767 | memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs)); |
| 768 | |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 769 | for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 770 | |
| 771 | if (!bp_temp[pri].primary) |
| 772 | continue; |
| 773 | |
| 774 | bp_curr->primary = bp_temp[pri].primary; |
| 775 | |
| 776 | if (bp_temp[pri].secondary) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 777 | if (tipc_nmap_equal(&bp_temp[pri].primary->nodes, |
| 778 | &bp_temp[pri].secondary->nodes)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 779 | bp_curr->secondary = bp_temp[pri].secondary; |
| 780 | } else { |
| 781 | bp_curr++; |
| 782 | bp_curr->primary = bp_temp[pri].secondary; |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | bp_curr++; |
| 787 | } |
| 788 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 789 | tipc_bclink_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 790 | } |
| 791 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 792 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 793 | int tipc_bclink_stats(char *buf, const u32 buf_size) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 794 | { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 795 | int ret; |
| 796 | struct tipc_stats *s; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 797 | |
| 798 | if (!bcl) |
| 799 | return 0; |
| 800 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 801 | tipc_bclink_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 802 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 803 | s = &bcl->stats; |
| 804 | |
| 805 | ret = tipc_snprintf(buf, buf_size, "Link <%s>\n" |
| 806 | " Window:%u packets\n", |
| 807 | bcl->name, bcl->queue_limit[0]); |
| 808 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 809 | " RX packets:%u fragments:%u/%u bundles:%u/%u\n", |
| 810 | s->recv_info, s->recv_fragments, |
| 811 | s->recv_fragmented, s->recv_bundles, |
| 812 | s->recv_bundled); |
| 813 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 814 | " TX packets:%u fragments:%u/%u bundles:%u/%u\n", |
| 815 | s->sent_info, s->sent_fragments, |
| 816 | s->sent_fragmented, s->sent_bundles, |
| 817 | s->sent_bundled); |
| 818 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 819 | " RX naks:%u defs:%u dups:%u\n", |
| 820 | s->recv_nacks, s->deferred_recv, s->duplicates); |
| 821 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 822 | " TX naks:%u acks:%u dups:%u\n", |
| 823 | s->sent_nacks, s->sent_acks, s->retransmitted); |
| 824 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 825 | " Congestion link:%u Send queue max:%u avg:%u\n", |
| 826 | s->link_congs, s->max_queue_sz, |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 827 | s->queue_sz_counts ? |
| 828 | (s->accu_queue_sz / s->queue_sz_counts) : 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 829 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 830 | tipc_bclink_unlock(); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 831 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 832 | } |
| 833 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 834 | int tipc_bclink_reset_stats(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 835 | { |
| 836 | if (!bcl) |
| 837 | return -ENOPROTOOPT; |
| 838 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 839 | tipc_bclink_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 840 | memset(&bcl->stats, 0, sizeof(bcl->stats)); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 841 | tipc_bclink_unlock(); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 842 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 843 | } |
| 844 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 845 | int tipc_bclink_set_queue_limits(u32 limit) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 846 | { |
| 847 | if (!bcl) |
| 848 | return -ENOPROTOOPT; |
| 849 | if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN)) |
| 850 | return -EINVAL; |
| 851 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 852 | tipc_bclink_lock(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 853 | tipc_link_set_queue_limits(bcl, limit); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 854 | tipc_bclink_unlock(); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 855 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 856 | } |
| 857 | |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 858 | int tipc_bclink_init(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 859 | { |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 860 | bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); |
| 861 | if (!bcbearer) |
| 862 | return -ENOMEM; |
| 863 | |
| 864 | bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); |
| 865 | if (!bclink) { |
| 866 | kfree(bcbearer); |
| 867 | return -ENOMEM; |
| 868 | } |
| 869 | |
| 870 | bcl = &bclink->link; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 871 | bcbearer->bearer.media = &bcbearer->media; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 872 | bcbearer->media.send_msg = tipc_bcbearer_send; |
Allan Stephens | 2e2d9be | 2011-04-07 10:22:31 -0400 | [diff] [blame] | 873 | sprintf(bcbearer->media.name, "tipc-broadcast"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 874 | |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 875 | spin_lock_init(&bclink->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 876 | INIT_LIST_HEAD(&bcl->waiting_ports); |
| 877 | bcl->next_out_no = 1; |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 878 | spin_lock_init(&bclink->node.lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 879 | bcl->owner = &bclink->node; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 880 | bcl->max_pkt = MAX_PKT_DEFAULT_MCAST; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 881 | tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 882 | bcl->bearer_id = MAX_BEARERS; |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 883 | rcu_assign_pointer(bearer_list[MAX_BEARERS], &bcbearer->bearer); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 884 | bcl->state = WORKING_WORKING; |
Stephen Hemminger | 4b704d5 | 2009-03-18 19:11:29 -0700 | [diff] [blame] | 885 | strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 886 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 887 | } |
| 888 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 889 | void tipc_bclink_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 890 | { |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 891 | tipc_bclink_lock(); |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 892 | tipc_link_purge_queues(bcl); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 893 | tipc_bclink_unlock(); |
Allan Stephens | c47e9b9 | 2011-10-24 10:29:26 -0400 | [diff] [blame] | 894 | |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 895 | RCU_INIT_POINTER(bearer_list[BCBEARER], NULL); |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 896 | synchronize_net(); |
| 897 | kfree(bcbearer); |
| 898 | kfree(bclink); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 899 | } |
| 900 | |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 901 | /** |
| 902 | * tipc_nmap_add - add a node to a node map |
| 903 | */ |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 904 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node) |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 905 | { |
| 906 | int n = tipc_node(node); |
| 907 | int w = n / WSIZE; |
| 908 | u32 mask = (1 << (n % WSIZE)); |
| 909 | |
| 910 | if ((nm_ptr->map[w] & mask) == 0) { |
| 911 | nm_ptr->count++; |
| 912 | nm_ptr->map[w] |= mask; |
| 913 | } |
| 914 | } |
| 915 | |
| 916 | /** |
| 917 | * tipc_nmap_remove - remove a node from a node map |
| 918 | */ |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 919 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node) |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 920 | { |
| 921 | int n = tipc_node(node); |
| 922 | int w = n / WSIZE; |
| 923 | u32 mask = (1 << (n % WSIZE)); |
| 924 | |
| 925 | if ((nm_ptr->map[w] & mask) != 0) { |
| 926 | nm_ptr->map[w] &= ~mask; |
| 927 | nm_ptr->count--; |
| 928 | } |
| 929 | } |
| 930 | |
| 931 | /** |
| 932 | * tipc_nmap_diff - find differences between node maps |
| 933 | * @nm_a: input node map A |
| 934 | * @nm_b: input node map B |
| 935 | * @nm_diff: output node map A-B (i.e. nodes of A that are not in B) |
| 936 | */ |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 937 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
| 938 | struct tipc_node_map *nm_b, |
| 939 | struct tipc_node_map *nm_diff) |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 940 | { |
| 941 | int stop = ARRAY_SIZE(nm_a->map); |
| 942 | int w; |
| 943 | int b; |
| 944 | u32 map; |
| 945 | |
| 946 | memset(nm_diff, 0, sizeof(*nm_diff)); |
| 947 | for (w = 0; w < stop; w++) { |
| 948 | map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]); |
| 949 | nm_diff->map[w] = map; |
| 950 | if (map != 0) { |
| 951 | for (b = 0 ; b < WSIZE; b++) { |
| 952 | if (map & (1 << b)) |
| 953 | nm_diff->count++; |
| 954 | } |
| 955 | } |
| 956 | } |
| 957 | } |
Allan Stephens | 43608ed | 2010-05-11 14:30:15 +0000 | [diff] [blame] | 958 | |
| 959 | /** |
| 960 | * tipc_port_list_add - add a port to a port list, ensuring no duplicates |
| 961 | */ |
Paul Gortmaker | 4584310 | 2011-12-29 20:33:30 -0500 | [diff] [blame] | 962 | void tipc_port_list_add(struct tipc_port_list *pl_ptr, u32 port) |
Allan Stephens | 43608ed | 2010-05-11 14:30:15 +0000 | [diff] [blame] | 963 | { |
Paul Gortmaker | 4584310 | 2011-12-29 20:33:30 -0500 | [diff] [blame] | 964 | struct tipc_port_list *item = pl_ptr; |
Allan Stephens | 43608ed | 2010-05-11 14:30:15 +0000 | [diff] [blame] | 965 | int i; |
| 966 | int item_sz = PLSIZE; |
| 967 | int cnt = pl_ptr->count; |
| 968 | |
| 969 | for (; ; cnt -= item_sz, item = item->next) { |
| 970 | if (cnt < PLSIZE) |
| 971 | item_sz = cnt; |
| 972 | for (i = 0; i < item_sz; i++) |
| 973 | if (item->ports[i] == port) |
| 974 | return; |
| 975 | if (i < PLSIZE) { |
| 976 | item->ports[i] = port; |
| 977 | pl_ptr->count++; |
| 978 | return; |
| 979 | } |
| 980 | if (!item->next) { |
| 981 | item->next = kmalloc(sizeof(*item), GFP_ATOMIC); |
| 982 | if (!item->next) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 983 | pr_warn("Incomplete multicast delivery, no memory\n"); |
Allan Stephens | 43608ed | 2010-05-11 14:30:15 +0000 | [diff] [blame] | 984 | return; |
| 985 | } |
| 986 | item->next->next = NULL; |
| 987 | } |
| 988 | } |
| 989 | } |
| 990 | |
| 991 | /** |
| 992 | * tipc_port_list_free - free dynamically created entries in port_list chain |
| 993 | * |
| 994 | */ |
Paul Gortmaker | 4584310 | 2011-12-29 20:33:30 -0500 | [diff] [blame] | 995 | void tipc_port_list_free(struct tipc_port_list *pl_ptr) |
Allan Stephens | 43608ed | 2010-05-11 14:30:15 +0000 | [diff] [blame] | 996 | { |
Paul Gortmaker | 4584310 | 2011-12-29 20:33:30 -0500 | [diff] [blame] | 997 | struct tipc_port_list *item; |
| 998 | struct tipc_port_list *next; |
Allan Stephens | 43608ed | 2010-05-11 14:30:15 +0000 | [diff] [blame] | 999 | |
| 1000 | for (item = pl_ptr->next; item; item = next) { |
| 1001 | next = item->next; |
| 1002 | kfree(item); |
| 1003 | } |
| 1004 | } |