Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/link.c: TIPC link code |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Jon Paul Maloy | c1336ee | 2015-03-13 16:08:08 -0400 | [diff] [blame] | 4 | * Copyright (c) 1996-2007, 2012-2015, Ericsson AB |
Ying Xue | 198d73b | 2013-06-17 10:54:42 -0400 | [diff] [blame] | 5 | * Copyright (c) 2004-2007, 2010-2013, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 8 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the names of the copyright holders nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 19 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 20 | * Alternatively, this software may be distributed under the terms of the |
| 21 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 22 | * Software Foundation. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 33 | * 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] | 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
| 37 | #include "core.h" |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 38 | #include "subscr.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "link.h" |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 40 | #include "bcast.h" |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 41 | #include "socket.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 42 | #include "name_distr.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 43 | #include "discover.h" |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 44 | #include "netlink.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | |
Ying Xue | 796c75d | 2013-06-17 10:54:48 -0400 | [diff] [blame] | 46 | #include <linux/pkt_sched.h> |
| 47 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 48 | /* |
| 49 | * Error message prefixes |
| 50 | */ |
| 51 | static const char *link_co_err = "Link changeover error, "; |
| 52 | static const char *link_rst_msg = "Resetting link "; |
| 53 | static const char *link_unk_evt = "Unknown link event "; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 54 | |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 55 | static const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = { |
| 56 | [TIPC_NLA_LINK_UNSPEC] = { .type = NLA_UNSPEC }, |
| 57 | [TIPC_NLA_LINK_NAME] = { |
| 58 | .type = NLA_STRING, |
| 59 | .len = TIPC_MAX_LINK_NAME |
| 60 | }, |
| 61 | [TIPC_NLA_LINK_MTU] = { .type = NLA_U32 }, |
| 62 | [TIPC_NLA_LINK_BROADCAST] = { .type = NLA_FLAG }, |
| 63 | [TIPC_NLA_LINK_UP] = { .type = NLA_FLAG }, |
| 64 | [TIPC_NLA_LINK_ACTIVE] = { .type = NLA_FLAG }, |
| 65 | [TIPC_NLA_LINK_PROP] = { .type = NLA_NESTED }, |
| 66 | [TIPC_NLA_LINK_STATS] = { .type = NLA_NESTED }, |
| 67 | [TIPC_NLA_LINK_RX] = { .type = NLA_U32 }, |
| 68 | [TIPC_NLA_LINK_TX] = { .type = NLA_U32 } |
| 69 | }; |
| 70 | |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 71 | /* Properties valid for media, bearar and link */ |
| 72 | static const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = { |
| 73 | [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC }, |
| 74 | [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 }, |
| 75 | [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 }, |
| 76 | [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 } |
| 77 | }; |
| 78 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 79 | /* |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 80 | * Out-of-range value for link session numbers |
| 81 | */ |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 82 | #define INVALID_SESSION 0x10000 |
| 83 | |
| 84 | /* |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 85 | * Link state events: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 86 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 87 | #define STARTING_EVT 856384768 /* link processing trigger */ |
| 88 | #define TRAFFIC_MSG_EVT 560815u /* rx'd ??? */ |
| 89 | #define TIMEOUT_EVT 560817u /* link timer expired */ |
| 90 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 91 | /* |
| 92 | * The following two 'message types' is really just implementation |
| 93 | * data conveniently stored in the message header. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 94 | * They must not be considered part of the protocol |
| 95 | */ |
| 96 | #define OPEN_MSG 0 |
| 97 | #define CLOSED_MSG 1 |
| 98 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 99 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 100 | * State value stored in 'exp_msg_count' |
| 101 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 102 | #define START_CHANGEOVER 100000u |
| 103 | |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 104 | static void link_handle_out_of_seq_msg(struct tipc_link *link, |
| 105 | struct sk_buff *skb); |
| 106 | static void tipc_link_proto_rcv(struct tipc_link *link, |
| 107 | struct sk_buff *skb); |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 108 | static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tol); |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 109 | static void link_state_event(struct tipc_link *l_ptr, u32 event); |
| 110 | static void link_reset_statistics(struct tipc_link *l_ptr); |
| 111 | static void link_print(struct tipc_link *l_ptr, const char *str); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 112 | static void tipc_link_sync_xmit(struct tipc_link *l); |
| 113 | static void tipc_link_sync_rcv(struct tipc_node *n, struct sk_buff *buf); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 114 | static void tipc_link_input(struct tipc_link *l, struct sk_buff *skb); |
| 115 | static bool tipc_data_input(struct tipc_link *l, struct sk_buff *skb); |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 116 | static bool tipc_link_failover_rcv(struct tipc_node *node, |
| 117 | struct sk_buff **skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 118 | /* |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 119 | * Simple link routines |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 120 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 121 | static unsigned int align(unsigned int i) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 122 | { |
| 123 | return (i + 3) & ~3u; |
| 124 | } |
| 125 | |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 126 | static void tipc_link_release(struct kref *kref) |
| 127 | { |
| 128 | kfree(container_of(kref, struct tipc_link, ref)); |
| 129 | } |
| 130 | |
| 131 | static void tipc_link_get(struct tipc_link *l_ptr) |
| 132 | { |
| 133 | kref_get(&l_ptr->ref); |
| 134 | } |
| 135 | |
| 136 | static void tipc_link_put(struct tipc_link *l_ptr) |
| 137 | { |
| 138 | kref_put(&l_ptr->ref, tipc_link_release); |
| 139 | } |
| 140 | |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 141 | static struct tipc_link *tipc_parallel_link(struct tipc_link *l) |
| 142 | { |
| 143 | if (l->owner->active_links[0] != l) |
| 144 | return l->owner->active_links[0]; |
| 145 | return l->owner->active_links[1]; |
| 146 | } |
| 147 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 148 | static void link_init_max_pkt(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 149 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 150 | struct tipc_node *node = l_ptr->owner; |
| 151 | struct tipc_net *tn = net_generic(node->net, tipc_net_id); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 152 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 153 | u32 max_pkt; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 154 | |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 155 | rcu_read_lock(); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 156 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[l_ptr->bearer_id]); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 157 | if (!b_ptr) { |
| 158 | rcu_read_unlock(); |
| 159 | return; |
| 160 | } |
| 161 | max_pkt = (b_ptr->mtu & ~3); |
| 162 | rcu_read_unlock(); |
| 163 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 164 | if (max_pkt > MAX_MSG_SIZE) |
| 165 | max_pkt = MAX_MSG_SIZE; |
| 166 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 167 | l_ptr->max_pkt_target = max_pkt; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 168 | if (l_ptr->max_pkt_target < MAX_PKT_DEFAULT) |
| 169 | l_ptr->max_pkt = l_ptr->max_pkt_target; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 170 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 171 | l_ptr->max_pkt = MAX_PKT_DEFAULT; |
| 172 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 173 | l_ptr->max_pkt_probes = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 174 | } |
| 175 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 176 | /* |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 177 | * Simple non-static link routines (i.e. referenced outside this file) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 178 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 179 | int tipc_link_is_up(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 180 | { |
| 181 | if (!l_ptr) |
| 182 | return 0; |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 183 | return link_working_working(l_ptr) || link_working_unknown(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 184 | } |
| 185 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 186 | int tipc_link_is_active(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 187 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 188 | return (l_ptr->owner->active_links[0] == l_ptr) || |
| 189 | (l_ptr->owner->active_links[1] == l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 193 | * link_timeout - handle expiration of link timer |
| 194 | * @l_ptr: pointer to link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 195 | */ |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 196 | static void link_timeout(unsigned long data) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 197 | { |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 198 | struct tipc_link *l_ptr = (struct tipc_link *)data; |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 199 | struct sk_buff *skb; |
| 200 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 201 | tipc_node_lock(l_ptr->owner); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 202 | |
| 203 | /* update counters used in statistical profiling of send traffic */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 204 | l_ptr->stats.accu_queue_sz += skb_queue_len(&l_ptr->transmq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 205 | l_ptr->stats.queue_sz_counts++; |
| 206 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 207 | skb = skb_peek(&l_ptr->transmq); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 208 | if (skb) { |
| 209 | struct tipc_msg *msg = buf_msg(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 210 | u32 length = msg_size(msg); |
| 211 | |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 212 | if ((msg_user(msg) == MSG_FRAGMENTER) && |
| 213 | (msg_type(msg) == FIRST_FRAGMENT)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 214 | length = msg_size(msg_get_wrapped(msg)); |
| 215 | } |
| 216 | if (length) { |
| 217 | l_ptr->stats.msg_lengths_total += length; |
| 218 | l_ptr->stats.msg_length_counts++; |
| 219 | if (length <= 64) |
| 220 | l_ptr->stats.msg_length_profile[0]++; |
| 221 | else if (length <= 256) |
| 222 | l_ptr->stats.msg_length_profile[1]++; |
| 223 | else if (length <= 1024) |
| 224 | l_ptr->stats.msg_length_profile[2]++; |
| 225 | else if (length <= 4096) |
| 226 | l_ptr->stats.msg_length_profile[3]++; |
| 227 | else if (length <= 16384) |
| 228 | l_ptr->stats.msg_length_profile[4]++; |
| 229 | else if (length <= 32768) |
| 230 | l_ptr->stats.msg_length_profile[5]++; |
| 231 | else |
| 232 | l_ptr->stats.msg_length_profile[6]++; |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | /* do all other link processing performed on a periodic basis */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 237 | link_state_event(l_ptr, TIMEOUT_EVT); |
| 238 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 239 | if (skb_queue_len(&l_ptr->backlogq)) |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 240 | tipc_link_push_packets(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 241 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 242 | tipc_node_unlock(l_ptr->owner); |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 243 | tipc_link_put(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 244 | } |
| 245 | |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 246 | static void link_set_timer(struct tipc_link *link, unsigned long time) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 247 | { |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 248 | if (!mod_timer(&link->timer, jiffies + time)) |
| 249 | tipc_link_get(link); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 253 | * tipc_link_create - create a new link |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 254 | * @n_ptr: pointer to associated node |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 255 | * @b_ptr: pointer to associated bearer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 256 | * @media_addr: media address to use when sending messages over link |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 257 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 258 | * Returns pointer to link. |
| 259 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 260 | struct tipc_link *tipc_link_create(struct tipc_node *n_ptr, |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 261 | struct tipc_bearer *b_ptr, |
| 262 | const struct tipc_media_addr *media_addr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 263 | { |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 264 | struct tipc_net *tn = net_generic(n_ptr->net, tipc_net_id); |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 265 | struct tipc_link *l_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 266 | struct tipc_msg *msg; |
| 267 | char *if_name; |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 268 | char addr_string[16]; |
| 269 | u32 peer = n_ptr->addr; |
| 270 | |
Holger Brunck | 0372bf5 | 2014-11-14 18:33:19 +0100 | [diff] [blame] | 271 | if (n_ptr->link_cnt >= MAX_BEARERS) { |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 272 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Holger Brunck | 0372bf5 | 2014-11-14 18:33:19 +0100 | [diff] [blame] | 273 | pr_err("Attempt to establish %uth link to %s. Max %u allowed.\n", |
| 274 | n_ptr->link_cnt, addr_string, MAX_BEARERS); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 275 | return NULL; |
| 276 | } |
| 277 | |
| 278 | if (n_ptr->links[b_ptr->identity]) { |
| 279 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 280 | pr_err("Attempt to establish second link on <%s> to %s\n", |
| 281 | b_ptr->name, addr_string); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 282 | return NULL; |
| 283 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 284 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 285 | l_ptr = kzalloc(sizeof(*l_ptr), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 286 | if (!l_ptr) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 287 | pr_warn("Link creation failed, no memory\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 288 | return NULL; |
| 289 | } |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 290 | kref_init(&l_ptr->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 291 | l_ptr->addr = peer; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 292 | if_name = strchr(b_ptr->name, ':') + 1; |
Allan Stephens | 062b4c9 | 2011-04-07 09:28:47 -0400 | [diff] [blame] | 293 | sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:unknown", |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 294 | tipc_zone(tn->own_addr), tipc_cluster(tn->own_addr), |
| 295 | tipc_node(tn->own_addr), |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 296 | if_name, |
| 297 | tipc_zone(peer), tipc_cluster(peer), tipc_node(peer)); |
Allan Stephens | 062b4c9 | 2011-04-07 09:28:47 -0400 | [diff] [blame] | 298 | /* note: peer i/f name is updated by reset/activate message */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 299 | memcpy(&l_ptr->media_addr, media_addr, sizeof(*media_addr)); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 300 | l_ptr->owner = n_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 301 | l_ptr->checkpoint = 1; |
Allan Stephens | f882cb7 | 2011-04-07 09:43:27 -0400 | [diff] [blame] | 302 | l_ptr->peer_session = INVALID_SESSION; |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 303 | l_ptr->bearer_id = b_ptr->identity; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 304 | link_set_supervision_props(l_ptr, b_ptr->tolerance); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 305 | l_ptr->state = RESET_UNKNOWN; |
| 306 | |
| 307 | l_ptr->pmsg = (struct tipc_msg *)&l_ptr->proto_msg; |
| 308 | msg = l_ptr->pmsg; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 309 | tipc_msg_init(tn->own_addr, msg, LINK_PROTOCOL, RESET_MSG, INT_H_SIZE, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 310 | l_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 311 | msg_set_size(msg, sizeof(l_ptr->proto_msg)); |
Ying Xue | bafa29e | 2015-01-09 15:27:12 +0800 | [diff] [blame] | 312 | msg_set_session(msg, (tn->random & 0xffff)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 313 | msg_set_bearer_id(msg, b_ptr->identity); |
| 314 | strcpy((char *)msg_data(msg), if_name); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 315 | l_ptr->net_plane = b_ptr->net_plane; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 316 | link_init_max_pkt(l_ptr); |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 317 | l_ptr->priority = b_ptr->priority; |
| 318 | tipc_link_set_queue_limits(l_ptr, b_ptr->window); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 319 | l_ptr->next_out_no = 1; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 320 | __skb_queue_head_init(&l_ptr->transmq); |
| 321 | __skb_queue_head_init(&l_ptr->backlogq); |
| 322 | __skb_queue_head_init(&l_ptr->deferdq); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 323 | skb_queue_head_init(&l_ptr->wakeupq); |
| 324 | skb_queue_head_init(&l_ptr->inputq); |
| 325 | skb_queue_head_init(&l_ptr->namedq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 326 | link_reset_statistics(l_ptr); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 327 | tipc_node_attach_link(n_ptr, l_ptr); |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 328 | setup_timer(&l_ptr->timer, link_timeout, (unsigned long)l_ptr); |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 329 | link_state_event(l_ptr, STARTING_EVT); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 330 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 331 | return l_ptr; |
| 332 | } |
| 333 | |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 334 | /** |
| 335 | * link_delete - Conditional deletion of link. |
| 336 | * If timer still running, real delete is done when it expires |
| 337 | * @link: link to be deleted |
| 338 | */ |
| 339 | void tipc_link_delete(struct tipc_link *link) |
| 340 | { |
| 341 | tipc_link_reset_fragments(link); |
| 342 | tipc_node_detach_link(link->owner, link); |
| 343 | tipc_link_put(link); |
| 344 | } |
| 345 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 346 | void tipc_link_delete_list(struct net *net, unsigned int bearer_id, |
| 347 | bool shutting_down) |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 348 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 349 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 350 | struct tipc_link *link; |
| 351 | struct tipc_node *node; |
Jon Paul Maloy | 169bf91 | 2015-03-10 12:23:34 -0400 | [diff] [blame] | 352 | bool del_link; |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 353 | |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 354 | rcu_read_lock(); |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 355 | list_for_each_entry_rcu(node, &tn->node_list, list) { |
| 356 | tipc_node_lock(node); |
| 357 | link = node->links[bearer_id]; |
| 358 | if (!link) { |
| 359 | tipc_node_unlock(node); |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 360 | continue; |
| 361 | } |
Jon Paul Maloy | 169bf91 | 2015-03-10 12:23:34 -0400 | [diff] [blame] | 362 | del_link = !tipc_link_is_up(link) && !link->exp_msg_count; |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 363 | tipc_link_reset(link); |
| 364 | if (del_timer(&link->timer)) |
| 365 | tipc_link_put(link); |
| 366 | link->flags |= LINK_STOPPED; |
| 367 | /* Delete link now, or when failover is finished: */ |
Jon Paul Maloy | 169bf91 | 2015-03-10 12:23:34 -0400 | [diff] [blame] | 368 | if (shutting_down || !tipc_node_is_up(node) || del_link) |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 369 | tipc_link_delete(link); |
| 370 | tipc_node_unlock(node); |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 371 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 372 | rcu_read_unlock(); |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 373 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 374 | |
| 375 | /** |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 376 | * link_schedule_user - schedule a message sender for wakeup after congestion |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 377 | * @link: congested link |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 378 | * @list: message that was attempted sent |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 379 | * Create pseudo msg to send back to user when congestion abates |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 380 | * Only consumes message if there is an error |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 381 | */ |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 382 | static int link_schedule_user(struct tipc_link *link, struct sk_buff_head *list) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 383 | { |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 384 | struct tipc_msg *msg = buf_msg(skb_peek(list)); |
| 385 | int imp = msg_importance(msg); |
| 386 | u32 oport = msg_origport(msg); |
| 387 | u32 addr = link_own_addr(link); |
| 388 | struct sk_buff *skb; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 389 | |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 390 | /* This really cannot happen... */ |
| 391 | if (unlikely(imp > TIPC_CRITICAL_IMPORTANCE)) { |
| 392 | pr_warn("%s<%s>, send queue full", link_rst_msg, link->name); |
| 393 | tipc_link_reset(link); |
| 394 | goto err; |
| 395 | } |
| 396 | /* Non-blocking sender: */ |
| 397 | if (TIPC_SKB_CB(skb_peek(list))->wakeup_pending) |
| 398 | return -ELINKCONG; |
| 399 | |
| 400 | /* Create and schedule wakeup pseudo message */ |
| 401 | skb = tipc_msg_create(SOCK_WAKEUP, 0, INT_H_SIZE, 0, |
| 402 | addr, addr, oport, 0, 0); |
| 403 | if (!skb) |
| 404 | goto err; |
| 405 | TIPC_SKB_CB(skb)->chain_sz = skb_queue_len(list); |
| 406 | TIPC_SKB_CB(skb)->chain_imp = imp; |
| 407 | skb_queue_tail(&link->wakeupq, skb); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 408 | link->stats.link_congs++; |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 409 | return -ELINKCONG; |
| 410 | err: |
| 411 | __skb_queue_purge(list); |
| 412 | return -ENOBUFS; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 413 | } |
| 414 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 415 | /** |
| 416 | * link_prepare_wakeup - prepare users for wakeup after congestion |
| 417 | * @link: congested link |
| 418 | * Move a number of waiting users, as permitted by available space in |
| 419 | * the send queue, from link wait queue to node wait queue for wakeup |
| 420 | */ |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 421 | void link_prepare_wakeup(struct tipc_link *l) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 422 | { |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 423 | int pnd[TIPC_SYSTEM_IMPORTANCE + 1] = {0,}; |
| 424 | int imp, lim; |
Ying Xue | 58d78b3 | 2014-11-26 11:41:51 +0800 | [diff] [blame] | 425 | struct sk_buff *skb, *tmp; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 426 | |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 427 | skb_queue_walk_safe(&l->wakeupq, skb, tmp) { |
| 428 | imp = TIPC_SKB_CB(skb)->chain_imp; |
| 429 | lim = l->window + l->backlog[imp].limit; |
| 430 | pnd[imp] += TIPC_SKB_CB(skb)->chain_sz; |
| 431 | if ((pnd[imp] + l->backlog[imp].len) >= lim) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 432 | break; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 433 | skb_unlink(skb, &l->wakeupq); |
| 434 | skb_queue_tail(&l->inputq, skb); |
| 435 | l->owner->inputq = &l->inputq; |
| 436 | l->owner->action_flags |= TIPC_MSG_EVT; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 437 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 438 | } |
| 439 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 440 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 441 | * tipc_link_reset_fragments - purge link's inbound message fragments queue |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 442 | * @l_ptr: pointer to link |
| 443 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 444 | void tipc_link_reset_fragments(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 445 | { |
Jon Paul Maloy | 37e2216 | 2014-05-14 05:39:12 -0400 | [diff] [blame] | 446 | kfree_skb(l_ptr->reasm_buf); |
| 447 | l_ptr->reasm_buf = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 448 | } |
| 449 | |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 450 | static void tipc_link_purge_backlog(struct tipc_link *l) |
| 451 | { |
| 452 | __skb_queue_purge(&l->backlogq); |
| 453 | l->backlog[TIPC_LOW_IMPORTANCE].len = 0; |
| 454 | l->backlog[TIPC_MEDIUM_IMPORTANCE].len = 0; |
| 455 | l->backlog[TIPC_HIGH_IMPORTANCE].len = 0; |
| 456 | l->backlog[TIPC_CRITICAL_IMPORTANCE].len = 0; |
| 457 | l->backlog[TIPC_SYSTEM_IMPORTANCE].len = 0; |
| 458 | } |
| 459 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 460 | /** |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 461 | * tipc_link_purge_queues - purge all pkt queues associated with link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 462 | * @l_ptr: pointer to link |
| 463 | */ |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 464 | void tipc_link_purge_queues(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 465 | { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 466 | __skb_queue_purge(&l_ptr->deferdq); |
| 467 | __skb_queue_purge(&l_ptr->transmq); |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 468 | tipc_link_purge_backlog(l_ptr); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 469 | tipc_link_reset_fragments(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 470 | } |
| 471 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 472 | void tipc_link_reset(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 473 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 474 | u32 prev_state = l_ptr->state; |
| 475 | u32 checkpoint = l_ptr->next_in_no; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 476 | int was_active_link = tipc_link_is_active(l_ptr); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 477 | struct tipc_node *owner = l_ptr->owner; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 478 | |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 479 | msg_set_session(l_ptr->pmsg, ((msg_session(l_ptr->pmsg) + 1) & 0xffff)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 480 | |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 481 | /* Link is down, accept any session */ |
| 482 | l_ptr->peer_session = INVALID_SESSION; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 483 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 484 | /* Prepare for max packet size negotiation */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 485 | link_init_max_pkt(l_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 486 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 487 | l_ptr->state = RESET_UNKNOWN; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 488 | |
| 489 | if ((prev_state == RESET_UNKNOWN) || (prev_state == RESET_RESET)) |
| 490 | return; |
| 491 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 492 | tipc_node_link_down(l_ptr->owner, l_ptr); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 493 | tipc_bearer_remove_dest(owner->net, l_ptr->bearer_id, l_ptr->addr); |
Paul Gortmaker | 7368ddf | 2010-10-12 14:25:58 +0000 | [diff] [blame] | 494 | |
Jon Paul Maloy | b9d4c33 | 2014-01-07 17:02:42 -0500 | [diff] [blame] | 495 | if (was_active_link && tipc_node_active_links(l_ptr->owner)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 496 | l_ptr->reset_checkpoint = checkpoint; |
| 497 | l_ptr->exp_msg_count = START_CHANGEOVER; |
| 498 | } |
| 499 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 500 | /* Clean up all queues, except inputq: */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 501 | __skb_queue_purge(&l_ptr->transmq); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 502 | __skb_queue_purge(&l_ptr->deferdq); |
Jon Paul Maloy | e6441ba | 2015-03-09 16:16:22 -0400 | [diff] [blame] | 503 | if (!owner->inputq) |
| 504 | owner->inputq = &l_ptr->inputq; |
| 505 | skb_queue_splice_init(&l_ptr->wakeupq, owner->inputq); |
| 506 | if (!skb_queue_empty(owner->inputq)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 507 | owner->action_flags |= TIPC_MSG_EVT; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 508 | tipc_link_purge_backlog(l_ptr); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 509 | l_ptr->rcv_unacked = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 510 | l_ptr->checkpoint = 1; |
| 511 | l_ptr->next_out_no = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 512 | l_ptr->fsm_msg_cnt = 0; |
| 513 | l_ptr->stale_count = 0; |
| 514 | link_reset_statistics(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 515 | } |
| 516 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 517 | void tipc_link_reset_list(struct net *net, unsigned int bearer_id) |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 518 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 519 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 520 | struct tipc_link *l_ptr; |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 521 | struct tipc_node *n_ptr; |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 522 | |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 523 | rcu_read_lock(); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 524 | list_for_each_entry_rcu(n_ptr, &tn->node_list, list) { |
Ying Xue | 5356f3d | 2014-05-05 08:56:09 +0800 | [diff] [blame] | 525 | tipc_node_lock(n_ptr); |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 526 | l_ptr = n_ptr->links[bearer_id]; |
| 527 | if (l_ptr) |
| 528 | tipc_link_reset(l_ptr); |
Ying Xue | 5356f3d | 2014-05-05 08:56:09 +0800 | [diff] [blame] | 529 | tipc_node_unlock(n_ptr); |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 530 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 531 | rcu_read_unlock(); |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 532 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 533 | |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 534 | static void link_activate(struct tipc_link *link) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 535 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 536 | struct tipc_node *node = link->owner; |
| 537 | |
| 538 | link->next_in_no = 1; |
| 539 | link->stats.recv_info = 1; |
| 540 | tipc_node_link_up(node, link); |
| 541 | tipc_bearer_add_dest(node->net, link->bearer_id, link->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | /** |
| 545 | * link_state_event - link finite state machine |
| 546 | * @l_ptr: pointer to link |
| 547 | * @event: state machine event to process |
| 548 | */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 549 | static void link_state_event(struct tipc_link *l_ptr, unsigned int event) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 550 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 551 | struct tipc_link *other; |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 552 | unsigned long cont_intv = l_ptr->cont_intv; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 553 | |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 554 | if (l_ptr->flags & LINK_STOPPED) |
| 555 | return; |
| 556 | |
Ying Xue | 135daee | 2014-02-13 17:29:08 -0500 | [diff] [blame] | 557 | if (!(l_ptr->flags & LINK_STARTED) && (event != STARTING_EVT)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 558 | return; /* Not yet. */ |
| 559 | |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 560 | /* Check whether changeover is going on */ |
| 561 | if (l_ptr->exp_msg_count) { |
Allan Stephens | a016892 | 2010-12-31 18:59:35 +0000 | [diff] [blame] | 562 | if (event == TIMEOUT_EVT) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 563 | link_set_timer(l_ptr, cont_intv); |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 564 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 565 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 566 | |
| 567 | switch (l_ptr->state) { |
| 568 | case WORKING_WORKING: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 569 | switch (event) { |
| 570 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 571 | case ACTIVATE_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 572 | break; |
| 573 | case TIMEOUT_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 574 | if (l_ptr->next_in_no != l_ptr->checkpoint) { |
| 575 | l_ptr->checkpoint = l_ptr->next_in_no; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 576 | if (tipc_bclink_acks_missing(l_ptr->owner)) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 577 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
| 578 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 579 | l_ptr->fsm_msg_cnt++; |
| 580 | } else if (l_ptr->max_pkt < l_ptr->max_pkt_target) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 581 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
| 582 | 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 583 | l_ptr->fsm_msg_cnt++; |
| 584 | } |
| 585 | link_set_timer(l_ptr, cont_intv); |
| 586 | break; |
| 587 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 588 | l_ptr->state = WORKING_UNKNOWN; |
| 589 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 590 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 591 | l_ptr->fsm_msg_cnt++; |
| 592 | link_set_timer(l_ptr, cont_intv / 4); |
| 593 | break; |
| 594 | case RESET_MSG: |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 595 | pr_debug("%s<%s>, requested by peer\n", |
| 596 | link_rst_msg, l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 597 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 598 | l_ptr->state = RESET_RESET; |
| 599 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 600 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
| 601 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 602 | l_ptr->fsm_msg_cnt++; |
| 603 | link_set_timer(l_ptr, cont_intv); |
| 604 | break; |
| 605 | default: |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 606 | pr_debug("%s%u in WW state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 607 | } |
| 608 | break; |
| 609 | case WORKING_UNKNOWN: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 610 | switch (event) { |
| 611 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 612 | case ACTIVATE_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 613 | l_ptr->state = WORKING_WORKING; |
| 614 | l_ptr->fsm_msg_cnt = 0; |
| 615 | link_set_timer(l_ptr, cont_intv); |
| 616 | break; |
| 617 | case RESET_MSG: |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 618 | pr_debug("%s<%s>, requested by peer while probing\n", |
| 619 | link_rst_msg, l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 620 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 621 | l_ptr->state = RESET_RESET; |
| 622 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 623 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
| 624 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 625 | l_ptr->fsm_msg_cnt++; |
| 626 | link_set_timer(l_ptr, cont_intv); |
| 627 | break; |
| 628 | case TIMEOUT_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 629 | if (l_ptr->next_in_no != l_ptr->checkpoint) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 630 | l_ptr->state = WORKING_WORKING; |
| 631 | l_ptr->fsm_msg_cnt = 0; |
| 632 | l_ptr->checkpoint = l_ptr->next_in_no; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 633 | if (tipc_bclink_acks_missing(l_ptr->owner)) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 634 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
| 635 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 636 | l_ptr->fsm_msg_cnt++; |
| 637 | } |
| 638 | link_set_timer(l_ptr, cont_intv); |
| 639 | } else if (l_ptr->fsm_msg_cnt < l_ptr->abort_limit) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 640 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
| 641 | 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 642 | l_ptr->fsm_msg_cnt++; |
| 643 | link_set_timer(l_ptr, cont_intv / 4); |
| 644 | } else { /* Link has failed */ |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 645 | pr_debug("%s<%s>, peer not responding\n", |
| 646 | link_rst_msg, l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 647 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 648 | l_ptr->state = RESET_UNKNOWN; |
| 649 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 650 | tipc_link_proto_xmit(l_ptr, RESET_MSG, |
| 651 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 652 | l_ptr->fsm_msg_cnt++; |
| 653 | link_set_timer(l_ptr, cont_intv); |
| 654 | } |
| 655 | break; |
| 656 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 657 | pr_err("%s%u in WU state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 658 | } |
| 659 | break; |
| 660 | case RESET_UNKNOWN: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 661 | switch (event) { |
| 662 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 663 | break; |
| 664 | case ACTIVATE_MSG: |
| 665 | other = l_ptr->owner->active_links[0]; |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 666 | if (other && link_working_unknown(other)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 667 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 668 | l_ptr->state = WORKING_WORKING; |
| 669 | l_ptr->fsm_msg_cnt = 0; |
| 670 | link_activate(l_ptr); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 671 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 672 | l_ptr->fsm_msg_cnt++; |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 673 | if (l_ptr->owner->working_links == 1) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 674 | tipc_link_sync_xmit(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 675 | link_set_timer(l_ptr, cont_intv); |
| 676 | break; |
| 677 | case RESET_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 678 | l_ptr->state = RESET_RESET; |
| 679 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 680 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
| 681 | 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 682 | l_ptr->fsm_msg_cnt++; |
| 683 | link_set_timer(l_ptr, cont_intv); |
| 684 | break; |
| 685 | case STARTING_EVT: |
Ying Xue | 135daee | 2014-02-13 17:29:08 -0500 | [diff] [blame] | 686 | l_ptr->flags |= LINK_STARTED; |
Jon Paul Maloy | af9946f | 2015-02-03 08:59:20 -0500 | [diff] [blame] | 687 | l_ptr->fsm_msg_cnt++; |
| 688 | link_set_timer(l_ptr, cont_intv); |
| 689 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 690 | case TIMEOUT_EVT: |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 691 | tipc_link_proto_xmit(l_ptr, RESET_MSG, 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 692 | l_ptr->fsm_msg_cnt++; |
| 693 | link_set_timer(l_ptr, cont_intv); |
| 694 | break; |
| 695 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 696 | pr_err("%s%u in RU state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 697 | } |
| 698 | break; |
| 699 | case RESET_RESET: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 700 | switch (event) { |
| 701 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 702 | case ACTIVATE_MSG: |
| 703 | other = l_ptr->owner->active_links[0]; |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 704 | if (other && link_working_unknown(other)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 705 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 706 | l_ptr->state = WORKING_WORKING; |
| 707 | l_ptr->fsm_msg_cnt = 0; |
| 708 | link_activate(l_ptr); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 709 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 710 | l_ptr->fsm_msg_cnt++; |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 711 | if (l_ptr->owner->working_links == 1) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 712 | tipc_link_sync_xmit(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 713 | link_set_timer(l_ptr, cont_intv); |
| 714 | break; |
| 715 | case RESET_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 716 | break; |
| 717 | case TIMEOUT_EVT: |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 718 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
| 719 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 720 | l_ptr->fsm_msg_cnt++; |
| 721 | link_set_timer(l_ptr, cont_intv); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 722 | break; |
| 723 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 724 | pr_err("%s%u in RR state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 725 | } |
| 726 | break; |
| 727 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 728 | pr_err("Unknown link state %u/%u\n", l_ptr->state, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 729 | } |
| 730 | } |
| 731 | |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 732 | /** |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 733 | * __tipc_link_xmit(): same as tipc_link_xmit, but destlink is known & locked |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 734 | * @link: link to use |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 735 | * @list: chain of buffers containing message |
| 736 | * |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 737 | * Consumes the buffer chain, except when returning -ELINKCONG, |
| 738 | * since the caller then may want to make more send attempts. |
| 739 | * Returns 0 if success, or errno: -ELINKCONG, -EMSGSIZE or -ENOBUFS |
| 740 | * Messages at TIPC_SYSTEM_IMPORTANCE are always accepted |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 741 | */ |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 742 | int __tipc_link_xmit(struct net *net, struct tipc_link *link, |
| 743 | struct sk_buff_head *list) |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 744 | { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 745 | struct tipc_msg *msg = buf_msg(skb_peek(list)); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 746 | unsigned int maxwin = link->window; |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 747 | unsigned int imp = msg_importance(msg); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 748 | uint mtu = link->max_pkt; |
| 749 | uint ack = mod(link->next_in_no - 1); |
| 750 | uint seqno = link->next_out_no; |
| 751 | uint bc_last_in = link->owner->bclink.last_in; |
| 752 | struct tipc_media_addr *addr = &link->media_addr; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 753 | struct sk_buff_head *transmq = &link->transmq; |
| 754 | struct sk_buff_head *backlogq = &link->backlogq; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 755 | struct sk_buff *skb, *tmp; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 756 | |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 757 | /* Match backlog limit against msg importance: */ |
| 758 | if (unlikely(link->backlog[imp].len >= link->backlog[imp].limit)) |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 759 | return link_schedule_user(link, list); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 760 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 761 | if (unlikely(msg_size(msg) > mtu)) { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 762 | __skb_queue_purge(list); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 763 | return -EMSGSIZE; |
| 764 | } |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 765 | /* Prepare each packet for sending, and add to relevant queue: */ |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 766 | skb_queue_walk_safe(list, skb, tmp) { |
| 767 | __skb_unlink(skb, list); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 768 | msg = buf_msg(skb); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 769 | msg_set_seqno(msg, seqno); |
| 770 | msg_set_ack(msg, ack); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 771 | msg_set_bcast_ack(msg, bc_last_in); |
| 772 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 773 | if (likely(skb_queue_len(transmq) < maxwin)) { |
| 774 | __skb_queue_tail(transmq, skb); |
| 775 | tipc_bearer_send(net, link->bearer_id, skb, addr); |
| 776 | link->rcv_unacked = 0; |
| 777 | seqno++; |
| 778 | continue; |
| 779 | } |
| 780 | if (tipc_msg_bundle(skb_peek_tail(backlogq), skb, mtu)) { |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 781 | link->stats.sent_bundled++; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 782 | continue; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 783 | } |
| 784 | if (tipc_msg_make_bundle(&skb, mtu, link->addr)) { |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 785 | link->stats.sent_bundled++; |
| 786 | link->stats.sent_bundles++; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 787 | imp = msg_importance(buf_msg(skb)); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 788 | } |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 789 | __skb_queue_tail(backlogq, skb); |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 790 | link->backlog[imp].len++; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 791 | seqno++; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 792 | } |
| 793 | link->next_out_no = seqno; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 794 | return 0; |
| 795 | } |
| 796 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 797 | static void skb2list(struct sk_buff *skb, struct sk_buff_head *list) |
| 798 | { |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 799 | skb_queue_head_init(list); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 800 | __skb_queue_tail(list, skb); |
| 801 | } |
| 802 | |
| 803 | static int __tipc_link_xmit_skb(struct tipc_link *link, struct sk_buff *skb) |
| 804 | { |
| 805 | struct sk_buff_head head; |
| 806 | |
| 807 | skb2list(skb, &head); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 808 | return __tipc_link_xmit(link->owner->net, link, &head); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 809 | } |
| 810 | |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 811 | /* tipc_link_xmit_skb(): send single buffer to destination |
| 812 | * Buffers sent via this functon are generally TIPC_SYSTEM_IMPORTANCE |
| 813 | * messages, which will not be rejected |
| 814 | * The only exception is datagram messages rerouted after secondary |
| 815 | * lookup, which are rare and safe to dispose of anyway. |
| 816 | * TODO: Return real return value, and let callers use |
| 817 | * tipc_wait_for_sendpkt() where applicable |
| 818 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 819 | int tipc_link_xmit_skb(struct net *net, struct sk_buff *skb, u32 dnode, |
| 820 | u32 selector) |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 821 | { |
| 822 | struct sk_buff_head head; |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 823 | int rc; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 824 | |
| 825 | skb2list(skb, &head); |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 826 | rc = tipc_link_xmit(net, &head, dnode, selector); |
| 827 | if (rc == -ELINKCONG) |
| 828 | kfree_skb(skb); |
| 829 | return 0; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 830 | } |
| 831 | |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 832 | /** |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 833 | * tipc_link_xmit() is the general link level function for message sending |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 834 | * @net: the applicable net namespace |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 835 | * @list: chain of buffers containing message |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 836 | * @dsz: amount of user data to be sent |
| 837 | * @dnode: address of destination node |
| 838 | * @selector: a number used for deterministic link selection |
| 839 | * Consumes the buffer chain, except when returning -ELINKCONG |
| 840 | * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE |
| 841 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 842 | int tipc_link_xmit(struct net *net, struct sk_buff_head *list, u32 dnode, |
| 843 | u32 selector) |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 844 | { |
| 845 | struct tipc_link *link = NULL; |
| 846 | struct tipc_node *node; |
| 847 | int rc = -EHOSTUNREACH; |
| 848 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 849 | node = tipc_node_find(net, dnode); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 850 | if (node) { |
| 851 | tipc_node_lock(node); |
| 852 | link = node->active_links[selector & 1]; |
| 853 | if (link) |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 854 | rc = __tipc_link_xmit(net, link, list); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 855 | tipc_node_unlock(node); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 856 | tipc_node_put(node); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 857 | } |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 858 | if (link) |
| 859 | return rc; |
| 860 | |
Erik Hugne | 3bd88ee | 2015-03-19 09:02:18 +0100 | [diff] [blame] | 861 | if (likely(in_own_node(net, dnode))) { |
| 862 | tipc_sk_rcv(net, list); |
| 863 | return 0; |
| 864 | } |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 865 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 866 | __skb_queue_purge(list); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 867 | return rc; |
| 868 | } |
| 869 | |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 870 | /* |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 871 | * tipc_link_sync_xmit - synchronize broadcast link endpoints. |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 872 | * |
| 873 | * Give a newly added peer node the sequence number where it should |
| 874 | * start receiving and acking broadcast packets. |
| 875 | * |
| 876 | * Called with node locked |
| 877 | */ |
Jon Paul Maloy | 25b660c | 2014-07-16 20:40:59 -0400 | [diff] [blame] | 878 | static void tipc_link_sync_xmit(struct tipc_link *link) |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 879 | { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 880 | struct sk_buff *skb; |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 881 | struct tipc_msg *msg; |
| 882 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 883 | skb = tipc_buf_acquire(INT_H_SIZE); |
| 884 | if (!skb) |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 885 | return; |
| 886 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 887 | msg = buf_msg(skb); |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 888 | tipc_msg_init(link_own_addr(link), msg, BCAST_PROTOCOL, STATE_MSG, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 889 | INT_H_SIZE, link->addr); |
Jon Paul Maloy | 25b660c | 2014-07-16 20:40:59 -0400 | [diff] [blame] | 890 | msg_set_last_bcast(msg, link->owner->bclink.acked); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 891 | __tipc_link_xmit_skb(link, skb); |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 892 | } |
| 893 | |
| 894 | /* |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 895 | * tipc_link_sync_rcv - synchronize broadcast link endpoints. |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 896 | * Receive the sequence number where we should start receiving and |
| 897 | * acking broadcast packets from a newly added peer node, and open |
| 898 | * up for reception of such packets. |
| 899 | * |
| 900 | * Called with node locked |
| 901 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 902 | static void tipc_link_sync_rcv(struct tipc_node *n, struct sk_buff *buf) |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 903 | { |
| 904 | struct tipc_msg *msg = buf_msg(buf); |
| 905 | |
| 906 | n->bclink.last_sent = n->bclink.last_in = msg_last_bcast(msg); |
| 907 | n->bclink.recv_permitted = true; |
| 908 | kfree_skb(buf); |
| 909 | } |
| 910 | |
| 911 | /* |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 912 | * tipc_link_push_packets - push unsent packets to bearer |
| 913 | * |
| 914 | * Push out the unsent messages of a link where congestion |
| 915 | * has abated. Node is locked. |
| 916 | * |
| 917 | * Called with node locked |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 918 | */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 919 | void tipc_link_push_packets(struct tipc_link *link) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 920 | { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 921 | struct sk_buff *skb; |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 922 | struct tipc_msg *msg; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 923 | unsigned int ack = mod(link->next_in_no - 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 924 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 925 | while (skb_queue_len(&link->transmq) < link->window) { |
| 926 | skb = __skb_dequeue(&link->backlogq); |
| 927 | if (!skb) |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 928 | break; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 929 | msg = buf_msg(skb); |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 930 | link->backlog[msg_importance(msg)].len--; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 931 | msg_set_ack(msg, ack); |
| 932 | msg_set_bcast_ack(msg, link->owner->bclink.last_in); |
| 933 | link->rcv_unacked = 0; |
| 934 | __skb_queue_tail(&link->transmq, skb); |
| 935 | tipc_bearer_send(link->owner->net, link->bearer_id, |
| 936 | skb, &link->media_addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 937 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 938 | } |
| 939 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 940 | void tipc_link_reset_all(struct tipc_node *node) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 941 | { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 942 | char addr_string[16]; |
| 943 | u32 i; |
| 944 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 945 | tipc_node_lock(node); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 946 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 947 | pr_warn("Resetting all links to %s\n", |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 948 | tipc_addr_string_fill(addr_string, node->addr)); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 949 | |
| 950 | for (i = 0; i < MAX_BEARERS; i++) { |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 951 | if (node->links[i]) { |
| 952 | link_print(node->links[i], "Resetting link\n"); |
| 953 | tipc_link_reset(node->links[i]); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 954 | } |
| 955 | } |
| 956 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 957 | tipc_node_unlock(node); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 958 | } |
| 959 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 960 | static void link_retransmit_failure(struct tipc_link *l_ptr, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 961 | struct sk_buff *buf) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 962 | { |
| 963 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 964 | struct net *net = l_ptr->owner->net; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 965 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 966 | pr_warn("Retransmission failure on link <%s>\n", l_ptr->name); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 967 | |
| 968 | if (l_ptr->addr) { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 969 | /* Handle failure on standard link */ |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 970 | link_print(l_ptr, "Resetting link\n"); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 971 | tipc_link_reset(l_ptr); |
| 972 | |
| 973 | } else { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 974 | /* Handle failure on broadcast link */ |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 975 | struct tipc_node *n_ptr; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 976 | char addr_string[16]; |
| 977 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 978 | pr_info("Msg seq number: %u, ", msg_seqno(msg)); |
| 979 | pr_cont("Outstanding acks: %lu\n", |
| 980 | (unsigned long) TIPC_SKB_CB(buf)->handle); |
Jeff Garzik | 617dbea | 2006-10-03 16:25:34 -0700 | [diff] [blame] | 981 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 982 | n_ptr = tipc_bclink_retransmit_to(net); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 983 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 984 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 985 | pr_info("Broadcast link info for %s\n", addr_string); |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 986 | pr_info("Reception permitted: %d, Acked: %u\n", |
| 987 | n_ptr->bclink.recv_permitted, |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 988 | n_ptr->bclink.acked); |
| 989 | pr_info("Last in: %u, Oos state: %u, Last sent: %u\n", |
| 990 | n_ptr->bclink.last_in, |
| 991 | n_ptr->bclink.oos_state, |
| 992 | n_ptr->bclink.last_sent); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 993 | |
Ying Xue | b952b2b | 2015-03-26 18:10:23 +0800 | [diff] [blame] | 994 | n_ptr->action_flags |= TIPC_BCAST_RESET; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 995 | l_ptr->stale_count = 0; |
| 996 | } |
| 997 | } |
| 998 | |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 999 | void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *skb, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1000 | u32 retransmits) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1001 | { |
| 1002 | struct tipc_msg *msg; |
| 1003 | |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1004 | if (!skb) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 1005 | return; |
| 1006 | |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1007 | msg = buf_msg(skb); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1008 | |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 1009 | /* Detect repeated retransmit failures */ |
| 1010 | if (l_ptr->last_retransmitted == msg_seqno(msg)) { |
| 1011 | if (++l_ptr->stale_count > 100) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1012 | link_retransmit_failure(l_ptr, skb); |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 1013 | return; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 1014 | } |
| 1015 | } else { |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 1016 | l_ptr->last_retransmitted = msg_seqno(msg); |
| 1017 | l_ptr->stale_count = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1018 | } |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 1019 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1020 | skb_queue_walk_from(&l_ptr->transmq, skb) { |
| 1021 | if (!retransmits) |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1022 | break; |
| 1023 | msg = buf_msg(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1024 | msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1025 | msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1026 | tipc_bearer_send(l_ptr->owner->net, l_ptr->bearer_id, skb, |
| 1027 | &l_ptr->media_addr); |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 1028 | retransmits--; |
| 1029 | l_ptr->stats.retransmitted++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1030 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1031 | } |
| 1032 | |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 1033 | /* link_synch(): check if all packets arrived before the synch |
| 1034 | * point have been consumed |
| 1035 | * Returns true if the parallel links are synched, otherwise false |
| 1036 | */ |
| 1037 | static bool link_synch(struct tipc_link *l) |
| 1038 | { |
| 1039 | unsigned int post_synch; |
| 1040 | struct tipc_link *pl; |
| 1041 | |
| 1042 | pl = tipc_parallel_link(l); |
| 1043 | if (pl == l) |
| 1044 | goto synched; |
| 1045 | |
| 1046 | /* Was last pre-synch packet added to input queue ? */ |
| 1047 | if (less_eq(pl->next_in_no, l->synch_point)) |
| 1048 | return false; |
| 1049 | |
| 1050 | /* Is it still in the input queue ? */ |
| 1051 | post_synch = mod(pl->next_in_no - l->synch_point) - 1; |
| 1052 | if (skb_queue_len(&pl->inputq) > post_synch) |
| 1053 | return false; |
| 1054 | synched: |
| 1055 | l->flags &= ~LINK_SYNCHING; |
| 1056 | return true; |
| 1057 | } |
| 1058 | |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1059 | static void link_retrieve_defq(struct tipc_link *link, |
| 1060 | struct sk_buff_head *list) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1061 | { |
| 1062 | u32 seq_no; |
| 1063 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1064 | if (skb_queue_empty(&link->deferdq)) |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1065 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1066 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1067 | seq_no = buf_seqno(skb_peek(&link->deferdq)); |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1068 | if (seq_no == mod(link->next_in_no)) |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1069 | skb_queue_splice_tail_init(&link->deferdq, list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1070 | } |
| 1071 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1072 | /** |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1073 | * tipc_rcv - process TIPC packets/messages arriving from off-node |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1074 | * @net: the applicable net namespace |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1075 | * @skb: TIPC packet |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1076 | * @b_ptr: pointer to bearer message arrived on |
Allan Stephens | b02b69c | 2010-08-17 11:00:07 +0000 | [diff] [blame] | 1077 | * |
| 1078 | * Invoked with no locks held. Bearer pointer must point to a valid bearer |
| 1079 | * structure (i.e. cannot be NULL), but bearer can be inactive. |
| 1080 | */ |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 1081 | void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1082 | { |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 1083 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1084 | struct sk_buff_head head; |
| 1085 | struct tipc_node *n_ptr; |
| 1086 | struct tipc_link *l_ptr; |
| 1087 | struct sk_buff *skb1, *tmp; |
| 1088 | struct tipc_msg *msg; |
| 1089 | u32 seq_no; |
| 1090 | u32 ackd; |
| 1091 | u32 released; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1092 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1093 | skb2list(skb, &head); |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1094 | |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1095 | while ((skb = __skb_dequeue(&head))) { |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1096 | /* Ensure message is well-formed */ |
Jon Paul Maloy | cf2157f | 2015-03-13 16:08:06 -0400 | [diff] [blame] | 1097 | if (unlikely(!tipc_msg_validate(skb))) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1098 | goto discard; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1099 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1100 | /* Handle arrival of a non-unicast link message */ |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1101 | msg = buf_msg(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1102 | if (unlikely(msg_non_seq(msg))) { |
Allan Stephens | 1265a02 | 2008-06-04 17:32:35 -0700 | [diff] [blame] | 1103 | if (msg_user(msg) == LINK_CONFIG) |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 1104 | tipc_disc_rcv(net, skb, b_ptr); |
Allan Stephens | 1265a02 | 2008-06-04 17:32:35 -0700 | [diff] [blame] | 1105 | else |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 1106 | tipc_bclink_rcv(net, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1107 | continue; |
| 1108 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1109 | |
Allan Stephens | ed33a9c | 2011-04-05 15:15:04 -0400 | [diff] [blame] | 1110 | /* Discard unicast link messages destined for another node */ |
Allan Stephens | 2600824 | 2006-06-25 23:39:31 -0700 | [diff] [blame] | 1111 | if (unlikely(!msg_short(msg) && |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 1112 | (msg_destnode(msg) != tn->own_addr))) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1113 | goto discard; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1114 | |
Allan Stephens | 5a68d5e | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 1115 | /* Locate neighboring node that sent message */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1116 | n_ptr = tipc_node_find(net, msg_prevnode(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1117 | if (unlikely(!n_ptr)) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1118 | goto discard; |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1119 | |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 1120 | tipc_node_lock(n_ptr); |
Allan Stephens | 5a68d5e | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 1121 | /* Locate unicast link endpoint that should handle message */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1122 | l_ptr = n_ptr->links[b_ptr->identity]; |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1123 | if (unlikely(!l_ptr)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1124 | goto unlock; |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1125 | |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1126 | /* Verify that communication with node is currently allowed */ |
Ying Xue | aecb9bb | 2014-05-08 08:54:39 +0800 | [diff] [blame] | 1127 | if ((n_ptr->action_flags & TIPC_WAIT_PEER_LINKS_DOWN) && |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1128 | msg_user(msg) == LINK_PROTOCOL && |
| 1129 | (msg_type(msg) == RESET_MSG || |
| 1130 | msg_type(msg) == ACTIVATE_MSG) && |
| 1131 | !msg_redundant_link(msg)) |
Ying Xue | aecb9bb | 2014-05-08 08:54:39 +0800 | [diff] [blame] | 1132 | n_ptr->action_flags &= ~TIPC_WAIT_PEER_LINKS_DOWN; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1133 | |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1134 | if (tipc_node_blocked(n_ptr)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1135 | goto unlock; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1136 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1137 | /* Validate message sequence number info */ |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1138 | seq_no = msg_seqno(msg); |
| 1139 | ackd = msg_ack(msg); |
| 1140 | |
| 1141 | /* Release acked messages */ |
Jon Paul Maloy | 2cdf391 | 2015-03-13 16:08:09 -0400 | [diff] [blame] | 1142 | if (unlikely(n_ptr->bclink.acked != msg_bcast_ack(msg))) |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 1143 | tipc_bclink_acknowledge(n_ptr, msg_bcast_ack(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1144 | |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1145 | released = 0; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1146 | skb_queue_walk_safe(&l_ptr->transmq, skb1, tmp) { |
| 1147 | if (more(buf_seqno(skb1), ackd)) |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1148 | break; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1149 | __skb_unlink(skb1, &l_ptr->transmq); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1150 | kfree_skb(skb1); |
| 1151 | released = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1152 | } |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1153 | |
| 1154 | /* Try sending any messages link endpoint has pending */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1155 | if (unlikely(skb_queue_len(&l_ptr->backlogq))) |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 1156 | tipc_link_push_packets(l_ptr); |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1157 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1158 | if (released && !skb_queue_empty(&l_ptr->wakeupq)) |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1159 | link_prepare_wakeup(l_ptr); |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1160 | |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1161 | /* Process the incoming packet */ |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1162 | if (unlikely(!link_working_working(l_ptr))) { |
| 1163 | if (msg_user(msg) == LINK_PROTOCOL) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1164 | tipc_link_proto_rcv(l_ptr, skb); |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1165 | link_retrieve_defq(l_ptr, &head); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1166 | skb = NULL; |
| 1167 | goto unlock; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1168 | } |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1169 | |
| 1170 | /* Traffic message. Conditionally activate link */ |
| 1171 | link_state_event(l_ptr, TRAFFIC_MSG_EVT); |
| 1172 | |
| 1173 | if (link_working_working(l_ptr)) { |
| 1174 | /* Re-insert buffer in front of queue */ |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1175 | __skb_queue_head(&head, skb); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1176 | skb = NULL; |
| 1177 | goto unlock; |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1178 | } |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1179 | goto unlock; |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1180 | } |
| 1181 | |
| 1182 | /* Link is now in state WORKING_WORKING */ |
| 1183 | if (unlikely(seq_no != mod(l_ptr->next_in_no))) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1184 | link_handle_out_of_seq_msg(l_ptr, skb); |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1185 | link_retrieve_defq(l_ptr, &head); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1186 | skb = NULL; |
| 1187 | goto unlock; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1188 | } |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 1189 | /* Synchronize with parallel link if applicable */ |
| 1190 | if (unlikely((l_ptr->flags & LINK_SYNCHING) && !msg_dup(msg))) { |
| 1191 | link_handle_out_of_seq_msg(l_ptr, skb); |
| 1192 | if (link_synch(l_ptr)) |
| 1193 | link_retrieve_defq(l_ptr, &head); |
| 1194 | skb = NULL; |
| 1195 | goto unlock; |
| 1196 | } |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1197 | l_ptr->next_in_no++; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1198 | if (unlikely(!skb_queue_empty(&l_ptr->deferdq))) |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1199 | link_retrieve_defq(l_ptr, &head); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1200 | if (unlikely(++l_ptr->rcv_unacked >= TIPC_MIN_LINK_WIN)) { |
Erik Hugne | 3f53bd8 | 2014-07-01 10:22:41 +0200 | [diff] [blame] | 1201 | l_ptr->stats.sent_acks++; |
| 1202 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0); |
| 1203 | } |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1204 | tipc_link_input(l_ptr, skb); |
| 1205 | skb = NULL; |
| 1206 | unlock: |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1207 | tipc_node_unlock(n_ptr); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 1208 | tipc_node_put(n_ptr); |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1209 | discard: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1210 | if (unlikely(skb)) |
| 1211 | kfree_skb(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1212 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1213 | } |
| 1214 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1215 | /* tipc_data_input - deliver data and name distr msgs to upper layer |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1216 | * |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1217 | * Consumes buffer if message is of right type |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1218 | * Node lock must be held |
| 1219 | */ |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1220 | static bool tipc_data_input(struct tipc_link *link, struct sk_buff *skb) |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1221 | { |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1222 | struct tipc_node *node = link->owner; |
| 1223 | struct tipc_msg *msg = buf_msg(skb); |
| 1224 | u32 dport = msg_destport(msg); |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1225 | |
| 1226 | switch (msg_user(msg)) { |
| 1227 | case TIPC_LOW_IMPORTANCE: |
| 1228 | case TIPC_MEDIUM_IMPORTANCE: |
| 1229 | case TIPC_HIGH_IMPORTANCE: |
| 1230 | case TIPC_CRITICAL_IMPORTANCE: |
| 1231 | case CONN_MANAGER: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1232 | if (tipc_skb_queue_tail(&link->inputq, skb, dport)) { |
| 1233 | node->inputq = &link->inputq; |
| 1234 | node->action_flags |= TIPC_MSG_EVT; |
| 1235 | } |
| 1236 | return true; |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1237 | case NAME_DISTRIBUTOR: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1238 | node->bclink.recv_permitted = true; |
| 1239 | node->namedq = &link->namedq; |
| 1240 | skb_queue_tail(&link->namedq, skb); |
| 1241 | if (skb_queue_len(&link->namedq) == 1) |
| 1242 | node->action_flags |= TIPC_NAMED_MSG_EVT; |
| 1243 | return true; |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1244 | case MSG_BUNDLER: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1245 | case CHANGEOVER_PROTOCOL: |
| 1246 | case MSG_FRAGMENTER: |
| 1247 | case BCAST_PROTOCOL: |
| 1248 | return false; |
| 1249 | default: |
| 1250 | pr_warn("Dropping received illegal msg type\n"); |
| 1251 | kfree_skb(skb); |
| 1252 | return false; |
| 1253 | }; |
| 1254 | } |
| 1255 | |
| 1256 | /* tipc_link_input - process packet that has passed link protocol check |
| 1257 | * |
| 1258 | * Consumes buffer |
| 1259 | * Node lock must be held |
| 1260 | */ |
| 1261 | static void tipc_link_input(struct tipc_link *link, struct sk_buff *skb) |
| 1262 | { |
| 1263 | struct tipc_node *node = link->owner; |
| 1264 | struct tipc_msg *msg = buf_msg(skb); |
| 1265 | struct sk_buff *iskb; |
| 1266 | int pos = 0; |
| 1267 | |
| 1268 | if (likely(tipc_data_input(link, skb))) |
| 1269 | return; |
| 1270 | |
| 1271 | switch (msg_user(msg)) { |
| 1272 | case CHANGEOVER_PROTOCOL: |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 1273 | if (msg_dup(msg)) { |
| 1274 | link->flags |= LINK_SYNCHING; |
| 1275 | link->synch_point = msg_seqno(msg_get_wrapped(msg)); |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1276 | kfree_skb(skb); |
| 1277 | break; |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 1278 | } |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1279 | if (!tipc_link_failover_rcv(node, &skb)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1280 | break; |
| 1281 | if (msg_user(buf_msg(skb)) != MSG_BUNDLER) { |
| 1282 | tipc_data_input(link, skb); |
| 1283 | break; |
| 1284 | } |
| 1285 | case MSG_BUNDLER: |
| 1286 | link->stats.recv_bundles++; |
| 1287 | link->stats.recv_bundled += msg_msgcnt(msg); |
| 1288 | |
| 1289 | while (tipc_msg_extract(skb, &iskb, &pos)) |
| 1290 | tipc_data_input(link, iskb); |
| 1291 | break; |
| 1292 | case MSG_FRAGMENTER: |
| 1293 | link->stats.recv_fragments++; |
| 1294 | if (tipc_buf_append(&link->reasm_buf, &skb)) { |
| 1295 | link->stats.recv_fragmented++; |
| 1296 | tipc_data_input(link, skb); |
| 1297 | } else if (!link->reasm_buf) { |
| 1298 | tipc_link_reset(link); |
| 1299 | } |
| 1300 | break; |
| 1301 | case BCAST_PROTOCOL: |
| 1302 | tipc_link_sync_rcv(node, skb); |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1303 | break; |
| 1304 | default: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1305 | break; |
| 1306 | }; |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1307 | } |
| 1308 | |
| 1309 | /** |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1310 | * tipc_link_defer_pkt - Add out-of-sequence message to deferred reception queue |
| 1311 | * |
| 1312 | * Returns increase in queue length (i.e. 0 or 1) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1313 | */ |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1314 | u32 tipc_link_defer_pkt(struct sk_buff_head *list, struct sk_buff *skb) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1315 | { |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1316 | struct sk_buff *skb1; |
| 1317 | u32 seq_no = buf_seqno(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1318 | |
| 1319 | /* Empty queue ? */ |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1320 | if (skb_queue_empty(list)) { |
| 1321 | __skb_queue_tail(list, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1322 | return 1; |
| 1323 | } |
| 1324 | |
| 1325 | /* Last ? */ |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1326 | if (less(buf_seqno(skb_peek_tail(list)), seq_no)) { |
| 1327 | __skb_queue_tail(list, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1328 | return 1; |
| 1329 | } |
| 1330 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1331 | /* Locate insertion point in queue, then insert; discard if duplicate */ |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1332 | skb_queue_walk(list, skb1) { |
| 1333 | u32 curr_seqno = buf_seqno(skb1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1334 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1335 | if (seq_no == curr_seqno) { |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1336 | kfree_skb(skb); |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1337 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1338 | } |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1339 | |
| 1340 | if (less(seq_no, curr_seqno)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1341 | break; |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1342 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1343 | |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1344 | __skb_queue_before(list, skb1, skb); |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1345 | return 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1346 | } |
| 1347 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1348 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1349 | * link_handle_out_of_seq_msg - handle arrival of out-of-sequence packet |
| 1350 | */ |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1351 | static void link_handle_out_of_seq_msg(struct tipc_link *l_ptr, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1352 | struct sk_buff *buf) |
| 1353 | { |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1354 | u32 seq_no = buf_seqno(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1355 | |
| 1356 | if (likely(msg_user(buf_msg(buf)) == LINK_PROTOCOL)) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1357 | tipc_link_proto_rcv(l_ptr, buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1358 | return; |
| 1359 | } |
| 1360 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1361 | /* Record OOS packet arrival (force mismatch on next timeout) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1362 | l_ptr->checkpoint--; |
| 1363 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1364 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1365 | * Discard packet if a duplicate; otherwise add it to deferred queue |
| 1366 | * and notify peer of gap as per protocol specification |
| 1367 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1368 | if (less(seq_no, mod(l_ptr->next_in_no))) { |
| 1369 | l_ptr->stats.duplicates++; |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1370 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1371 | return; |
| 1372 | } |
| 1373 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1374 | if (tipc_link_defer_pkt(&l_ptr->deferdq, buf)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1375 | l_ptr->stats.deferred_recv++; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1376 | if ((skb_queue_len(&l_ptr->deferdq) % TIPC_MIN_LINK_WIN) == 1) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1377 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0); |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1378 | } else { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1379 | l_ptr->stats.duplicates++; |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1380 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1381 | } |
| 1382 | |
| 1383 | /* |
| 1384 | * Send protocol message to the other endpoint. |
| 1385 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1386 | void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg, |
| 1387 | u32 gap, u32 tolerance, u32 priority, u32 ack_mtu) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1388 | { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 1389 | struct sk_buff *buf = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1390 | struct tipc_msg *msg = l_ptr->pmsg; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1391 | u32 msg_size = sizeof(l_ptr->proto_msg); |
Allan Stephens | 75f0aa4 | 2011-02-28 15:30:20 -0500 | [diff] [blame] | 1392 | int r_flag; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1393 | |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 1394 | /* Don't send protocol message during link changeover */ |
| 1395 | if (l_ptr->exp_msg_count) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1396 | return; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1397 | |
| 1398 | /* Abort non-RESET send if communication with node is prohibited */ |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1399 | if ((tipc_node_blocked(l_ptr->owner)) && (msg_typ != RESET_MSG)) |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1400 | return; |
| 1401 | |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1402 | /* Create protocol message with "out-of-sequence" sequence number */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1403 | msg_set_type(msg, msg_typ); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1404 | msg_set_net_plane(msg, l_ptr->net_plane); |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1405 | msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1406 | msg_set_last_bcast(msg, tipc_bclink_get_last_sent(l_ptr->owner->net)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1407 | |
| 1408 | if (msg_typ == STATE_MSG) { |
| 1409 | u32 next_sent = mod(l_ptr->next_out_no); |
| 1410 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1411 | if (!tipc_link_is_up(l_ptr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1412 | return; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1413 | if (skb_queue_len(&l_ptr->backlogq)) |
| 1414 | next_sent = buf_seqno(skb_peek(&l_ptr->backlogq)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1415 | msg_set_next_sent(msg, next_sent); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1416 | if (!skb_queue_empty(&l_ptr->deferdq)) { |
| 1417 | u32 rec = buf_seqno(skb_peek(&l_ptr->deferdq)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1418 | gap = mod(rec - mod(l_ptr->next_in_no)); |
| 1419 | } |
| 1420 | msg_set_seq_gap(msg, gap); |
| 1421 | if (gap) |
| 1422 | l_ptr->stats.sent_nacks++; |
| 1423 | msg_set_link_tolerance(msg, tolerance); |
| 1424 | msg_set_linkprio(msg, priority); |
| 1425 | msg_set_max_pkt(msg, ack_mtu); |
| 1426 | msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); |
| 1427 | msg_set_probe(msg, probe_msg != 0); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1428 | if (probe_msg) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1429 | u32 mtu = l_ptr->max_pkt; |
| 1430 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1431 | if ((mtu < l_ptr->max_pkt_target) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1432 | link_working_working(l_ptr) && |
| 1433 | l_ptr->fsm_msg_cnt) { |
| 1434 | msg_size = (mtu + (l_ptr->max_pkt_target - mtu)/2 + 2) & ~3; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1435 | if (l_ptr->max_pkt_probes == 10) { |
| 1436 | l_ptr->max_pkt_target = (msg_size - 4); |
| 1437 | l_ptr->max_pkt_probes = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1438 | msg_size = (mtu + (l_ptr->max_pkt_target - mtu)/2 + 2) & ~3; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1439 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1440 | l_ptr->max_pkt_probes++; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1441 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1442 | |
| 1443 | l_ptr->stats.sent_probes++; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1444 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1445 | l_ptr->stats.sent_states++; |
| 1446 | } else { /* RESET_MSG or ACTIVATE_MSG */ |
| 1447 | msg_set_ack(msg, mod(l_ptr->reset_checkpoint - 1)); |
| 1448 | msg_set_seq_gap(msg, 0); |
| 1449 | msg_set_next_sent(msg, 1); |
Allan Stephens | f23d9bf | 2011-01-18 15:15:34 -0500 | [diff] [blame] | 1450 | msg_set_probe(msg, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1451 | msg_set_link_tolerance(msg, l_ptr->tolerance); |
| 1452 | msg_set_linkprio(msg, l_ptr->priority); |
| 1453 | msg_set_max_pkt(msg, l_ptr->max_pkt_target); |
| 1454 | } |
| 1455 | |
Allan Stephens | 75f0aa4 | 2011-02-28 15:30:20 -0500 | [diff] [blame] | 1456 | r_flag = (l_ptr->owner->working_links > tipc_link_is_up(l_ptr)); |
| 1457 | msg_set_redundant_link(msg, r_flag); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1458 | msg_set_linkprio(msg, l_ptr->priority); |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1459 | msg_set_size(msg, msg_size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1460 | |
| 1461 | msg_set_seqno(msg, mod(l_ptr->next_out_no + (0xffff/2))); |
| 1462 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 1463 | buf = tipc_buf_acquire(msg_size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1464 | if (!buf) |
| 1465 | return; |
| 1466 | |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 1467 | skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg)); |
Ying Xue | 796c75d | 2013-06-17 10:54:48 -0400 | [diff] [blame] | 1468 | buf->priority = TC_PRIO_CONTROL; |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1469 | tipc_bearer_send(l_ptr->owner->net, l_ptr->bearer_id, buf, |
| 1470 | &l_ptr->media_addr); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1471 | l_ptr->rcv_unacked = 0; |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1472 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1473 | } |
| 1474 | |
| 1475 | /* |
| 1476 | * Receive protocol message : |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1477 | * Note that network plane id propagates through the network, and may |
| 1478 | * change at any time. The node with lowest address rules |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1479 | */ |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1480 | static void tipc_link_proto_rcv(struct tipc_link *l_ptr, |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 1481 | struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1482 | { |
| 1483 | u32 rec_gap = 0; |
| 1484 | u32 max_pkt_info; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1485 | u32 max_pkt_ack; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1486 | u32 msg_tol; |
| 1487 | struct tipc_msg *msg = buf_msg(buf); |
| 1488 | |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 1489 | /* Discard protocol message during link changeover */ |
| 1490 | if (l_ptr->exp_msg_count) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1491 | goto exit; |
| 1492 | |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1493 | if (l_ptr->net_plane != msg_net_plane(msg)) |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1494 | if (link_own_addr(l_ptr) > msg_prevnode(msg)) |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1495 | l_ptr->net_plane = msg_net_plane(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1496 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1497 | switch (msg_type(msg)) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1498 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1499 | case RESET_MSG: |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 1500 | if (!link_working_unknown(l_ptr) && |
| 1501 | (l_ptr->peer_session != INVALID_SESSION)) { |
Allan Stephens | 641c218 | 2011-04-07 09:54:43 -0400 | [diff] [blame] | 1502 | if (less_eq(msg_session(msg), l_ptr->peer_session)) |
| 1503 | break; /* duplicate or old reset: ignore */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1504 | } |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1505 | |
| 1506 | if (!msg_redundant_link(msg) && (link_working_working(l_ptr) || |
| 1507 | link_working_unknown(l_ptr))) { |
| 1508 | /* |
| 1509 | * peer has lost contact -- don't allow peer's links |
| 1510 | * to reactivate before we recognize loss & clean up |
| 1511 | */ |
Ying Xue | ca9cf06 | 2014-05-08 08:54:40 +0800 | [diff] [blame] | 1512 | l_ptr->owner->action_flags |= TIPC_WAIT_OWN_LINKS_DOWN; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1513 | } |
| 1514 | |
Allan Stephens | 47361c8 | 2011-10-26 10:55:16 -0400 | [diff] [blame] | 1515 | link_state_event(l_ptr, RESET_MSG); |
| 1516 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1517 | /* fall thru' */ |
| 1518 | case ACTIVATE_MSG: |
| 1519 | /* Update link settings according other endpoint's values */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1520 | strcpy((strrchr(l_ptr->name, ':') + 1), (char *)msg_data(msg)); |
| 1521 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1522 | msg_tol = msg_link_tolerance(msg); |
| 1523 | if (msg_tol > l_ptr->tolerance) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1524 | link_set_supervision_props(l_ptr, msg_tol); |
| 1525 | |
| 1526 | if (msg_linkprio(msg) > l_ptr->priority) |
| 1527 | l_ptr->priority = msg_linkprio(msg); |
| 1528 | |
| 1529 | max_pkt_info = msg_max_pkt(msg); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1530 | if (max_pkt_info) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1531 | if (max_pkt_info < l_ptr->max_pkt_target) |
| 1532 | l_ptr->max_pkt_target = max_pkt_info; |
| 1533 | if (l_ptr->max_pkt > l_ptr->max_pkt_target) |
| 1534 | l_ptr->max_pkt = l_ptr->max_pkt_target; |
| 1535 | } else { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1536 | l_ptr->max_pkt = l_ptr->max_pkt_target; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1537 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1538 | |
Allan Stephens | 4d75313 | 2011-10-25 12:19:05 -0400 | [diff] [blame] | 1539 | /* Synchronize broadcast link info, if not done previously */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1540 | if (!tipc_node_is_up(l_ptr->owner)) { |
| 1541 | l_ptr->owner->bclink.last_sent = |
| 1542 | l_ptr->owner->bclink.last_in = |
| 1543 | msg_last_bcast(msg); |
| 1544 | l_ptr->owner->bclink.oos_state = 0; |
| 1545 | } |
Allan Stephens | 4d75313 | 2011-10-25 12:19:05 -0400 | [diff] [blame] | 1546 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1547 | l_ptr->peer_session = msg_session(msg); |
| 1548 | l_ptr->peer_bearer_id = msg_bearer_id(msg); |
Allan Stephens | 47361c8 | 2011-10-26 10:55:16 -0400 | [diff] [blame] | 1549 | |
| 1550 | if (msg_type(msg) == ACTIVATE_MSG) |
| 1551 | link_state_event(l_ptr, ACTIVATE_MSG); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1552 | break; |
| 1553 | case STATE_MSG: |
| 1554 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1555 | msg_tol = msg_link_tolerance(msg); |
| 1556 | if (msg_tol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1557 | link_set_supervision_props(l_ptr, msg_tol); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1558 | |
| 1559 | if (msg_linkprio(msg) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1560 | (msg_linkprio(msg) != l_ptr->priority)) { |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 1561 | pr_debug("%s<%s>, priority change %u->%u\n", |
| 1562 | link_rst_msg, l_ptr->name, |
| 1563 | l_ptr->priority, msg_linkprio(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1564 | l_ptr->priority = msg_linkprio(msg); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1565 | tipc_link_reset(l_ptr); /* Enforce change to take effect */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1566 | break; |
| 1567 | } |
Jon Paul Maloy | ec37dcd | 2014-05-14 05:39:10 -0400 | [diff] [blame] | 1568 | |
| 1569 | /* Record reception; force mismatch at next timeout: */ |
| 1570 | l_ptr->checkpoint--; |
| 1571 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1572 | link_state_event(l_ptr, TRAFFIC_MSG_EVT); |
| 1573 | l_ptr->stats.recv_states++; |
| 1574 | if (link_reset_unknown(l_ptr)) |
| 1575 | break; |
| 1576 | |
| 1577 | if (less_eq(mod(l_ptr->next_in_no), msg_next_sent(msg))) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1578 | rec_gap = mod(msg_next_sent(msg) - |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1579 | mod(l_ptr->next_in_no)); |
| 1580 | } |
| 1581 | |
| 1582 | max_pkt_ack = msg_max_pkt(msg); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1583 | if (max_pkt_ack > l_ptr->max_pkt) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1584 | l_ptr->max_pkt = max_pkt_ack; |
| 1585 | l_ptr->max_pkt_probes = 0; |
| 1586 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1587 | |
| 1588 | max_pkt_ack = 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1589 | if (msg_probe(msg)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1590 | l_ptr->stats.recv_probes++; |
Allan Stephens | a016892 | 2010-12-31 18:59:35 +0000 | [diff] [blame] | 1591 | if (msg_size(msg) > sizeof(l_ptr->proto_msg)) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1592 | max_pkt_ack = msg_size(msg); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1593 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1594 | |
| 1595 | /* Protocol message before retransmits, reduce loss risk */ |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 1596 | if (l_ptr->owner->bclink.recv_permitted) |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1597 | tipc_bclink_update_link_state(l_ptr->owner, |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1598 | msg_last_bcast(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1599 | |
| 1600 | if (rec_gap || (msg_probe(msg))) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1601 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, rec_gap, 0, |
| 1602 | 0, max_pkt_ack); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1603 | } |
| 1604 | if (msg_seq_gap(msg)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1605 | l_ptr->stats.recv_nacks++; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1606 | tipc_link_retransmit(l_ptr, skb_peek(&l_ptr->transmq), |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1607 | msg_seq_gap(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1608 | } |
| 1609 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1610 | } |
| 1611 | exit: |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1612 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1613 | } |
| 1614 | |
| 1615 | |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1616 | /* tipc_link_tunnel_xmit(): Tunnel one packet via a link belonging to |
| 1617 | * a different bearer. Owner node is locked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1618 | */ |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1619 | static void tipc_link_tunnel_xmit(struct tipc_link *l_ptr, |
| 1620 | struct tipc_msg *tunnel_hdr, |
| 1621 | struct tipc_msg *msg, |
| 1622 | u32 selector) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1623 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1624 | struct tipc_link *tunnel; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1625 | struct sk_buff *skb; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1626 | u32 length = msg_size(msg); |
| 1627 | |
| 1628 | tunnel = l_ptr->owner->active_links[selector & 1]; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1629 | if (!tipc_link_is_up(tunnel)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1630 | pr_warn("%stunnel link no longer available\n", link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1631 | return; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1632 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1633 | msg_set_size(tunnel_hdr, length + INT_H_SIZE); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1634 | skb = tipc_buf_acquire(length + INT_H_SIZE); |
| 1635 | if (!skb) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1636 | pr_warn("%sunable to send tunnel msg\n", link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1637 | return; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1638 | } |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1639 | skb_copy_to_linear_data(skb, tunnel_hdr, INT_H_SIZE); |
| 1640 | skb_copy_to_linear_data_offset(skb, INT_H_SIZE, msg, length); |
| 1641 | __tipc_link_xmit_skb(tunnel, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1642 | } |
| 1643 | |
| 1644 | |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1645 | /* tipc_link_failover_send_queue(): A link has gone down, but a second |
| 1646 | * link is still active. We can do failover. Tunnel the failing link's |
| 1647 | * whole send queue via the remaining link. This way, we don't lose |
| 1648 | * any packets, and sequence order is preserved for subsequent traffic |
| 1649 | * sent over the remaining link. Owner node is locked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1650 | */ |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1651 | void tipc_link_failover_send_queue(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1652 | { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1653 | int msgcount; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1654 | struct tipc_link *tunnel = l_ptr->owner->active_links[0]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1655 | struct tipc_msg tunnel_hdr; |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1656 | struct sk_buff *skb; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1657 | int split_bundles; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1658 | |
| 1659 | if (!tunnel) |
| 1660 | return; |
| 1661 | |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1662 | tipc_msg_init(link_own_addr(l_ptr), &tunnel_hdr, CHANGEOVER_PROTOCOL, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 1663 | ORIGINAL_MSG, INT_H_SIZE, l_ptr->addr); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1664 | skb_queue_splice_tail_init(&l_ptr->backlogq, &l_ptr->transmq); |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 1665 | tipc_link_purge_backlog(l_ptr); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1666 | msgcount = skb_queue_len(&l_ptr->transmq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1667 | msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id); |
| 1668 | msg_set_msgcnt(&tunnel_hdr, msgcount); |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 1669 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1670 | if (skb_queue_empty(&l_ptr->transmq)) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1671 | skb = tipc_buf_acquire(INT_H_SIZE); |
| 1672 | if (skb) { |
| 1673 | skb_copy_to_linear_data(skb, &tunnel_hdr, INT_H_SIZE); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1674 | msg_set_size(&tunnel_hdr, INT_H_SIZE); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1675 | __tipc_link_xmit_skb(tunnel, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1676 | } else { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1677 | pr_warn("%sunable to send changeover msg\n", |
| 1678 | link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1679 | } |
| 1680 | return; |
| 1681 | } |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 1682 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1683 | split_bundles = (l_ptr->owner->active_links[0] != |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1684 | l_ptr->owner->active_links[1]); |
| 1685 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1686 | skb_queue_walk(&l_ptr->transmq, skb) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1687 | struct tipc_msg *msg = buf_msg(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1688 | |
| 1689 | if ((msg_user(msg) == MSG_BUNDLER) && split_bundles) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1690 | struct tipc_msg *m = msg_get_wrapped(msg); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1691 | unchar *pos = (unchar *)m; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1692 | |
Florian Westphal | d788d80 | 2007-08-02 19:28:06 -0700 | [diff] [blame] | 1693 | msgcount = msg_msgcnt(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1694 | while (msgcount--) { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1695 | msg_set_seqno(m, msg_seqno(msg)); |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1696 | tipc_link_tunnel_xmit(l_ptr, &tunnel_hdr, m, |
| 1697 | msg_link_selector(m)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1698 | pos += align(msg_size(m)); |
| 1699 | m = (struct tipc_msg *)pos; |
| 1700 | } |
| 1701 | } else { |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1702 | tipc_link_tunnel_xmit(l_ptr, &tunnel_hdr, msg, |
| 1703 | msg_link_selector(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1704 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1705 | } |
| 1706 | } |
| 1707 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1708 | /* tipc_link_dup_queue_xmit(): A second link has become active. Tunnel a |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1709 | * duplicate of the first link's send queue via the new link. This way, we |
| 1710 | * are guaranteed that currently queued packets from a socket are delivered |
| 1711 | * before future traffic from the same socket, even if this is using the |
| 1712 | * new link. The last arriving copy of each duplicate packet is dropped at |
| 1713 | * the receiving end by the regular protocol check, so packet cardinality |
| 1714 | * and sequence order is preserved per sender/receiver socket pair. |
| 1715 | * Owner node is locked. |
| 1716 | */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1717 | void tipc_link_dup_queue_xmit(struct tipc_link *link, |
| 1718 | struct tipc_link *tnl) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1719 | { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1720 | struct sk_buff *skb; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1721 | struct tipc_msg tnl_hdr; |
| 1722 | struct sk_buff_head *queue = &link->transmq; |
| 1723 | int mcnt; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1724 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1725 | tipc_msg_init(link_own_addr(link), &tnl_hdr, CHANGEOVER_PROTOCOL, |
| 1726 | DUPLICATE_MSG, INT_H_SIZE, link->addr); |
| 1727 | mcnt = skb_queue_len(&link->transmq) + skb_queue_len(&link->backlogq); |
| 1728 | msg_set_msgcnt(&tnl_hdr, mcnt); |
| 1729 | msg_set_bearer_id(&tnl_hdr, link->peer_bearer_id); |
| 1730 | |
| 1731 | tunnel_queue: |
| 1732 | skb_queue_walk(queue, skb) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1733 | struct sk_buff *outskb; |
| 1734 | struct tipc_msg *msg = buf_msg(skb); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1735 | u32 len = msg_size(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1736 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1737 | msg_set_ack(msg, mod(link->next_in_no - 1)); |
| 1738 | msg_set_bcast_ack(msg, link->owner->bclink.last_in); |
| 1739 | msg_set_size(&tnl_hdr, len + INT_H_SIZE); |
| 1740 | outskb = tipc_buf_acquire(len + INT_H_SIZE); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1741 | if (outskb == NULL) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1742 | pr_warn("%sunable to send duplicate msg\n", |
| 1743 | link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1744 | return; |
| 1745 | } |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1746 | skb_copy_to_linear_data(outskb, &tnl_hdr, INT_H_SIZE); |
| 1747 | skb_copy_to_linear_data_offset(outskb, INT_H_SIZE, |
| 1748 | skb->data, len); |
| 1749 | __tipc_link_xmit_skb(tnl, outskb); |
| 1750 | if (!tipc_link_is_up(link)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1751 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1752 | } |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1753 | if (queue == &link->backlogq) |
| 1754 | return; |
| 1755 | queue = &link->backlogq; |
| 1756 | goto tunnel_queue; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1757 | } |
| 1758 | |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1759 | /* tipc_link_failover_rcv(): Receive a tunnelled ORIGINAL_MSG packet |
| 1760 | * Owner node is locked. |
| 1761 | */ |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1762 | static bool tipc_link_failover_rcv(struct tipc_node *node, |
| 1763 | struct sk_buff **skb) |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1764 | { |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1765 | struct tipc_msg *msg = buf_msg(*skb); |
| 1766 | struct sk_buff *iskb = NULL; |
| 1767 | struct tipc_link *link = NULL; |
| 1768 | int bearer_id = msg_bearer_id(msg); |
Jon Paul Maloy | c1336ee | 2015-03-13 16:08:08 -0400 | [diff] [blame] | 1769 | int pos = 0; |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1770 | |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1771 | if (msg_type(msg) != ORIGINAL_MSG) { |
| 1772 | pr_warn("%sunknown tunnel pkt received\n", link_co_err); |
| 1773 | goto exit; |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1774 | } |
Dan Carpenter | cb4b102f | 2013-05-06 08:28:41 +0000 | [diff] [blame] | 1775 | if (bearer_id >= MAX_BEARERS) |
| 1776 | goto exit; |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1777 | link = node->links[bearer_id]; |
| 1778 | if (!link) |
| 1779 | goto exit; |
| 1780 | if (tipc_link_is_up(link)) |
| 1781 | tipc_link_reset(link); |
Jon Paul Maloy | 1dab3d5 | 2014-02-13 17:29:10 -0500 | [diff] [blame] | 1782 | |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1783 | /* First failover packet? */ |
| 1784 | if (link->exp_msg_count == START_CHANGEOVER) |
| 1785 | link->exp_msg_count = msg_msgcnt(msg); |
| 1786 | |
| 1787 | /* Should we expect an inner packet? */ |
| 1788 | if (!link->exp_msg_count) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1789 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1790 | |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1791 | if (!tipc_msg_extract(*skb, &iskb, &pos)) { |
| 1792 | pr_warn("%sno inner failover pkt\n", link_co_err); |
| 1793 | *skb = NULL; |
| 1794 | goto exit; |
| 1795 | } |
| 1796 | link->exp_msg_count--; |
| 1797 | *skb = NULL; |
| 1798 | |
| 1799 | /* Was packet already delivered? */ |
| 1800 | if (less(buf_seqno(iskb), link->reset_checkpoint)) { |
| 1801 | kfree_skb(iskb); |
| 1802 | iskb = NULL; |
| 1803 | goto exit; |
| 1804 | } |
| 1805 | if (msg_user(buf_msg(iskb)) == MSG_FRAGMENTER) { |
| 1806 | link->stats.recv_fragments++; |
| 1807 | tipc_buf_append(&link->reasm_buf, &iskb); |
| 1808 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1809 | exit: |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame^] | 1810 | if (link && (!link->exp_msg_count) && (link->flags & LINK_STOPPED)) |
| 1811 | tipc_link_delete(link); |
| 1812 | kfree_skb(*skb); |
| 1813 | *skb = iskb; |
| 1814 | return *skb; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1815 | } |
| 1816 | |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 1817 | static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1818 | { |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 1819 | unsigned long intv = ((tol / 4) > 500) ? 500 : tol / 4; |
| 1820 | |
| 1821 | if ((tol < TIPC_MIN_LINK_TOL) || (tol > TIPC_MAX_LINK_TOL)) |
Allan Stephens | 5413b4c | 2011-01-18 13:24:55 -0500 | [diff] [blame] | 1822 | return; |
| 1823 | |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 1824 | l_ptr->tolerance = tol; |
| 1825 | l_ptr->cont_intv = msecs_to_jiffies(intv); |
| 1826 | l_ptr->abort_limit = tol / (jiffies_to_msecs(l_ptr->cont_intv) / 4); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1827 | } |
| 1828 | |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 1829 | void tipc_link_set_queue_limits(struct tipc_link *l, u32 win) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1830 | { |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 1831 | int max_bulk = TIPC_MAX_PUBLICATIONS / (l->max_pkt / ITEM_SIZE); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1832 | |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 1833 | l->window = win; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 1834 | l->backlog[TIPC_LOW_IMPORTANCE].limit = win / 2; |
| 1835 | l->backlog[TIPC_MEDIUM_IMPORTANCE].limit = win; |
| 1836 | l->backlog[TIPC_HIGH_IMPORTANCE].limit = win / 2 * 3; |
| 1837 | l->backlog[TIPC_CRITICAL_IMPORTANCE].limit = win * 2; |
| 1838 | l->backlog[TIPC_SYSTEM_IMPORTANCE].limit = max_bulk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1839 | } |
| 1840 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1841 | /* tipc_link_find_owner - locate owner node of link by link's name |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1842 | * @net: the applicable net namespace |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1843 | * @name: pointer to link name string |
| 1844 | * @bearer_id: pointer to index in 'node->links' array where the link was found. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1845 | * |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1846 | * Returns pointer to node owning the link, or 0 if no matching link is found. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1847 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1848 | static struct tipc_node *tipc_link_find_owner(struct net *net, |
| 1849 | const char *link_name, |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1850 | unsigned int *bearer_id) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1851 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1852 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1853 | struct tipc_link *l_ptr; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1854 | struct tipc_node *n_ptr; |
Fabian Frederick | 886eaa1 | 2014-12-25 12:05:50 +0100 | [diff] [blame] | 1855 | struct tipc_node *found_node = NULL; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1856 | int i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1857 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1858 | *bearer_id = 0; |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 1859 | rcu_read_lock(); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1860 | list_for_each_entry_rcu(n_ptr, &tn->node_list, list) { |
Jon Paul Maloy | a11607f | 2014-02-14 16:40:44 -0500 | [diff] [blame] | 1861 | tipc_node_lock(n_ptr); |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1862 | for (i = 0; i < MAX_BEARERS; i++) { |
| 1863 | l_ptr = n_ptr->links[i]; |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1864 | if (l_ptr && !strcmp(l_ptr->name, link_name)) { |
| 1865 | *bearer_id = i; |
| 1866 | found_node = n_ptr; |
| 1867 | break; |
| 1868 | } |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1869 | } |
Jon Paul Maloy | a11607f | 2014-02-14 16:40:44 -0500 | [diff] [blame] | 1870 | tipc_node_unlock(n_ptr); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1871 | if (found_node) |
| 1872 | break; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1873 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 1874 | rcu_read_unlock(); |
| 1875 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1876 | return found_node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1877 | } |
| 1878 | |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 1879 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1880 | * link_reset_statistics - reset link statistics |
| 1881 | * @l_ptr: pointer to link |
| 1882 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1883 | static void link_reset_statistics(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1884 | { |
| 1885 | memset(&l_ptr->stats, 0, sizeof(l_ptr->stats)); |
| 1886 | l_ptr->stats.sent_info = l_ptr->next_out_no; |
| 1887 | l_ptr->stats.recv_info = l_ptr->next_in_no; |
| 1888 | } |
| 1889 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1890 | static void link_print(struct tipc_link *l_ptr, const char *str) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1891 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1892 | struct tipc_net *tn = net_generic(l_ptr->owner->net, tipc_net_id); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1893 | struct tipc_bearer *b_ptr; |
| 1894 | |
| 1895 | rcu_read_lock(); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1896 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[l_ptr->bearer_id]); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1897 | if (b_ptr) |
| 1898 | pr_info("%s Link %x<%s>:", str, l_ptr->addr, b_ptr->name); |
| 1899 | rcu_read_unlock(); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 1900 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1901 | if (link_working_unknown(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 1902 | pr_cont(":WU\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 1903 | else if (link_reset_reset(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 1904 | pr_cont(":RR\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 1905 | else if (link_reset_unknown(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 1906 | pr_cont(":RU\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 1907 | else if (link_working_working(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 1908 | pr_cont(":WW\n"); |
| 1909 | else |
| 1910 | pr_cont("\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1911 | } |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 1912 | |
| 1913 | /* Parse and validate nested (link) properties valid for media, bearer and link |
| 1914 | */ |
| 1915 | int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]) |
| 1916 | { |
| 1917 | int err; |
| 1918 | |
| 1919 | err = nla_parse_nested(props, TIPC_NLA_PROP_MAX, prop, |
| 1920 | tipc_nl_prop_policy); |
| 1921 | if (err) |
| 1922 | return err; |
| 1923 | |
| 1924 | if (props[TIPC_NLA_PROP_PRIO]) { |
| 1925 | u32 prio; |
| 1926 | |
| 1927 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); |
| 1928 | if (prio > TIPC_MAX_LINK_PRI) |
| 1929 | return -EINVAL; |
| 1930 | } |
| 1931 | |
| 1932 | if (props[TIPC_NLA_PROP_TOL]) { |
| 1933 | u32 tol; |
| 1934 | |
| 1935 | tol = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
| 1936 | if ((tol < TIPC_MIN_LINK_TOL) || (tol > TIPC_MAX_LINK_TOL)) |
| 1937 | return -EINVAL; |
| 1938 | } |
| 1939 | |
| 1940 | if (props[TIPC_NLA_PROP_WIN]) { |
| 1941 | u32 win; |
| 1942 | |
| 1943 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
| 1944 | if ((win < TIPC_MIN_LINK_WIN) || (win > TIPC_MAX_LINK_WIN)) |
| 1945 | return -EINVAL; |
| 1946 | } |
| 1947 | |
| 1948 | return 0; |
| 1949 | } |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 1950 | |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1951 | int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info) |
| 1952 | { |
| 1953 | int err; |
| 1954 | int res = 0; |
| 1955 | int bearer_id; |
| 1956 | char *name; |
| 1957 | struct tipc_link *link; |
| 1958 | struct tipc_node *node; |
| 1959 | struct nlattr *attrs[TIPC_NLA_LINK_MAX + 1]; |
Richard Alpe | 37e2d48 | 2015-02-09 09:50:08 +0100 | [diff] [blame] | 1960 | struct net *net = sock_net(skb->sk); |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1961 | |
| 1962 | if (!info->attrs[TIPC_NLA_LINK]) |
| 1963 | return -EINVAL; |
| 1964 | |
| 1965 | err = nla_parse_nested(attrs, TIPC_NLA_LINK_MAX, |
| 1966 | info->attrs[TIPC_NLA_LINK], |
| 1967 | tipc_nl_link_policy); |
| 1968 | if (err) |
| 1969 | return err; |
| 1970 | |
| 1971 | if (!attrs[TIPC_NLA_LINK_NAME]) |
| 1972 | return -EINVAL; |
| 1973 | |
| 1974 | name = nla_data(attrs[TIPC_NLA_LINK_NAME]); |
| 1975 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1976 | node = tipc_link_find_owner(net, name, &bearer_id); |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1977 | if (!node) |
| 1978 | return -EINVAL; |
| 1979 | |
| 1980 | tipc_node_lock(node); |
| 1981 | |
| 1982 | link = node->links[bearer_id]; |
| 1983 | if (!link) { |
| 1984 | res = -EINVAL; |
| 1985 | goto out; |
| 1986 | } |
| 1987 | |
| 1988 | if (attrs[TIPC_NLA_LINK_PROP]) { |
| 1989 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; |
| 1990 | |
| 1991 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], |
| 1992 | props); |
| 1993 | if (err) { |
| 1994 | res = err; |
| 1995 | goto out; |
| 1996 | } |
| 1997 | |
| 1998 | if (props[TIPC_NLA_PROP_TOL]) { |
| 1999 | u32 tol; |
| 2000 | |
| 2001 | tol = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
| 2002 | link_set_supervision_props(link, tol); |
| 2003 | tipc_link_proto_xmit(link, STATE_MSG, 0, 0, tol, 0, 0); |
| 2004 | } |
| 2005 | if (props[TIPC_NLA_PROP_PRIO]) { |
| 2006 | u32 prio; |
| 2007 | |
| 2008 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); |
| 2009 | link->priority = prio; |
| 2010 | tipc_link_proto_xmit(link, STATE_MSG, 0, 0, 0, prio, 0); |
| 2011 | } |
| 2012 | if (props[TIPC_NLA_PROP_WIN]) { |
| 2013 | u32 win; |
| 2014 | |
| 2015 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
| 2016 | tipc_link_set_queue_limits(link, win); |
| 2017 | } |
| 2018 | } |
| 2019 | |
| 2020 | out: |
| 2021 | tipc_node_unlock(node); |
| 2022 | |
| 2023 | return res; |
| 2024 | } |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2025 | |
| 2026 | static int __tipc_nl_add_stats(struct sk_buff *skb, struct tipc_stats *s) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2027 | { |
| 2028 | int i; |
| 2029 | struct nlattr *stats; |
| 2030 | |
| 2031 | struct nla_map { |
| 2032 | u32 key; |
| 2033 | u32 val; |
| 2034 | }; |
| 2035 | |
| 2036 | struct nla_map map[] = { |
| 2037 | {TIPC_NLA_STATS_RX_INFO, s->recv_info}, |
| 2038 | {TIPC_NLA_STATS_RX_FRAGMENTS, s->recv_fragments}, |
| 2039 | {TIPC_NLA_STATS_RX_FRAGMENTED, s->recv_fragmented}, |
| 2040 | {TIPC_NLA_STATS_RX_BUNDLES, s->recv_bundles}, |
| 2041 | {TIPC_NLA_STATS_RX_BUNDLED, s->recv_bundled}, |
| 2042 | {TIPC_NLA_STATS_TX_INFO, s->sent_info}, |
| 2043 | {TIPC_NLA_STATS_TX_FRAGMENTS, s->sent_fragments}, |
| 2044 | {TIPC_NLA_STATS_TX_FRAGMENTED, s->sent_fragmented}, |
| 2045 | {TIPC_NLA_STATS_TX_BUNDLES, s->sent_bundles}, |
| 2046 | {TIPC_NLA_STATS_TX_BUNDLED, s->sent_bundled}, |
| 2047 | {TIPC_NLA_STATS_MSG_PROF_TOT, (s->msg_length_counts) ? |
| 2048 | s->msg_length_counts : 1}, |
| 2049 | {TIPC_NLA_STATS_MSG_LEN_CNT, s->msg_length_counts}, |
| 2050 | {TIPC_NLA_STATS_MSG_LEN_TOT, s->msg_lengths_total}, |
| 2051 | {TIPC_NLA_STATS_MSG_LEN_P0, s->msg_length_profile[0]}, |
| 2052 | {TIPC_NLA_STATS_MSG_LEN_P1, s->msg_length_profile[1]}, |
| 2053 | {TIPC_NLA_STATS_MSG_LEN_P2, s->msg_length_profile[2]}, |
| 2054 | {TIPC_NLA_STATS_MSG_LEN_P3, s->msg_length_profile[3]}, |
| 2055 | {TIPC_NLA_STATS_MSG_LEN_P4, s->msg_length_profile[4]}, |
| 2056 | {TIPC_NLA_STATS_MSG_LEN_P5, s->msg_length_profile[5]}, |
| 2057 | {TIPC_NLA_STATS_MSG_LEN_P6, s->msg_length_profile[6]}, |
| 2058 | {TIPC_NLA_STATS_RX_STATES, s->recv_states}, |
| 2059 | {TIPC_NLA_STATS_RX_PROBES, s->recv_probes}, |
| 2060 | {TIPC_NLA_STATS_RX_NACKS, s->recv_nacks}, |
| 2061 | {TIPC_NLA_STATS_RX_DEFERRED, s->deferred_recv}, |
| 2062 | {TIPC_NLA_STATS_TX_STATES, s->sent_states}, |
| 2063 | {TIPC_NLA_STATS_TX_PROBES, s->sent_probes}, |
| 2064 | {TIPC_NLA_STATS_TX_NACKS, s->sent_nacks}, |
| 2065 | {TIPC_NLA_STATS_TX_ACKS, s->sent_acks}, |
| 2066 | {TIPC_NLA_STATS_RETRANSMITTED, s->retransmitted}, |
| 2067 | {TIPC_NLA_STATS_DUPLICATES, s->duplicates}, |
| 2068 | {TIPC_NLA_STATS_LINK_CONGS, s->link_congs}, |
| 2069 | {TIPC_NLA_STATS_MAX_QUEUE, s->max_queue_sz}, |
| 2070 | {TIPC_NLA_STATS_AVG_QUEUE, s->queue_sz_counts ? |
| 2071 | (s->accu_queue_sz / s->queue_sz_counts) : 0} |
| 2072 | }; |
| 2073 | |
| 2074 | stats = nla_nest_start(skb, TIPC_NLA_LINK_STATS); |
| 2075 | if (!stats) |
| 2076 | return -EMSGSIZE; |
| 2077 | |
| 2078 | for (i = 0; i < ARRAY_SIZE(map); i++) |
| 2079 | if (nla_put_u32(skb, map[i].key, map[i].val)) |
| 2080 | goto msg_full; |
| 2081 | |
| 2082 | nla_nest_end(skb, stats); |
| 2083 | |
| 2084 | return 0; |
| 2085 | msg_full: |
| 2086 | nla_nest_cancel(skb, stats); |
| 2087 | |
| 2088 | return -EMSGSIZE; |
| 2089 | } |
| 2090 | |
| 2091 | /* Caller should hold appropriate locks to protect the link */ |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2092 | static int __tipc_nl_add_link(struct net *net, struct tipc_nl_msg *msg, |
| 2093 | struct tipc_link *link) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2094 | { |
| 2095 | int err; |
| 2096 | void *hdr; |
| 2097 | struct nlattr *attrs; |
| 2098 | struct nlattr *prop; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2099 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2100 | |
Richard Alpe | bfb3e5d | 2015-02-09 09:50:03 +0100 | [diff] [blame] | 2101 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2102 | NLM_F_MULTI, TIPC_NL_LINK_GET); |
| 2103 | if (!hdr) |
| 2104 | return -EMSGSIZE; |
| 2105 | |
| 2106 | attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK); |
| 2107 | if (!attrs) |
| 2108 | goto msg_full; |
| 2109 | |
| 2110 | if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, link->name)) |
| 2111 | goto attr_msg_full; |
| 2112 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_DEST, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2113 | tipc_cluster_mask(tn->own_addr))) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2114 | goto attr_msg_full; |
| 2115 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_MTU, link->max_pkt)) |
| 2116 | goto attr_msg_full; |
| 2117 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, link->next_in_no)) |
| 2118 | goto attr_msg_full; |
| 2119 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, link->next_out_no)) |
| 2120 | goto attr_msg_full; |
| 2121 | |
| 2122 | if (tipc_link_is_up(link)) |
| 2123 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP)) |
| 2124 | goto attr_msg_full; |
| 2125 | if (tipc_link_is_active(link)) |
| 2126 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_ACTIVE)) |
| 2127 | goto attr_msg_full; |
| 2128 | |
| 2129 | prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP); |
| 2130 | if (!prop) |
| 2131 | goto attr_msg_full; |
| 2132 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, link->priority)) |
| 2133 | goto prop_msg_full; |
| 2134 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, link->tolerance)) |
| 2135 | goto prop_msg_full; |
| 2136 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 2137 | link->window)) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2138 | goto prop_msg_full; |
| 2139 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, link->priority)) |
| 2140 | goto prop_msg_full; |
| 2141 | nla_nest_end(msg->skb, prop); |
| 2142 | |
| 2143 | err = __tipc_nl_add_stats(msg->skb, &link->stats); |
| 2144 | if (err) |
| 2145 | goto attr_msg_full; |
| 2146 | |
| 2147 | nla_nest_end(msg->skb, attrs); |
| 2148 | genlmsg_end(msg->skb, hdr); |
| 2149 | |
| 2150 | return 0; |
| 2151 | |
| 2152 | prop_msg_full: |
| 2153 | nla_nest_cancel(msg->skb, prop); |
| 2154 | attr_msg_full: |
| 2155 | nla_nest_cancel(msg->skb, attrs); |
| 2156 | msg_full: |
| 2157 | genlmsg_cancel(msg->skb, hdr); |
| 2158 | |
| 2159 | return -EMSGSIZE; |
| 2160 | } |
| 2161 | |
| 2162 | /* Caller should hold node lock */ |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2163 | static int __tipc_nl_add_node_links(struct net *net, struct tipc_nl_msg *msg, |
| 2164 | struct tipc_node *node, u32 *prev_link) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2165 | { |
| 2166 | u32 i; |
| 2167 | int err; |
| 2168 | |
| 2169 | for (i = *prev_link; i < MAX_BEARERS; i++) { |
| 2170 | *prev_link = i; |
| 2171 | |
| 2172 | if (!node->links[i]) |
| 2173 | continue; |
| 2174 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2175 | err = __tipc_nl_add_link(net, msg, node->links[i]); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2176 | if (err) |
| 2177 | return err; |
| 2178 | } |
| 2179 | *prev_link = 0; |
| 2180 | |
| 2181 | return 0; |
| 2182 | } |
| 2183 | |
| 2184 | int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2185 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2186 | struct net *net = sock_net(skb->sk); |
| 2187 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2188 | struct tipc_node *node; |
| 2189 | struct tipc_nl_msg msg; |
| 2190 | u32 prev_node = cb->args[0]; |
| 2191 | u32 prev_link = cb->args[1]; |
| 2192 | int done = cb->args[2]; |
| 2193 | int err; |
| 2194 | |
| 2195 | if (done) |
| 2196 | return 0; |
| 2197 | |
| 2198 | msg.skb = skb; |
| 2199 | msg.portid = NETLINK_CB(cb->skb).portid; |
| 2200 | msg.seq = cb->nlh->nlmsg_seq; |
| 2201 | |
| 2202 | rcu_read_lock(); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2203 | if (prev_node) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2204 | node = tipc_node_find(net, prev_node); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2205 | if (!node) { |
| 2206 | /* We never set seq or call nl_dump_check_consistent() |
| 2207 | * this means that setting prev_seq here will cause the |
| 2208 | * consistence check to fail in the netlink callback |
| 2209 | * handler. Resulting in the last NLMSG_DONE message |
| 2210 | * having the NLM_F_DUMP_INTR flag set. |
| 2211 | */ |
| 2212 | cb->prev_seq = 1; |
| 2213 | goto out; |
| 2214 | } |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 2215 | tipc_node_put(node); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2216 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2217 | list_for_each_entry_continue_rcu(node, &tn->node_list, |
| 2218 | list) { |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2219 | tipc_node_lock(node); |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2220 | err = __tipc_nl_add_node_links(net, &msg, node, |
| 2221 | &prev_link); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2222 | tipc_node_unlock(node); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 2223 | tipc_node_put(node); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2224 | if (err) |
| 2225 | goto out; |
| 2226 | |
| 2227 | prev_node = node->addr; |
| 2228 | } |
| 2229 | } else { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 2230 | err = tipc_nl_add_bc_link(net, &msg); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2231 | if (err) |
| 2232 | goto out; |
| 2233 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2234 | list_for_each_entry_rcu(node, &tn->node_list, list) { |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2235 | tipc_node_lock(node); |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2236 | err = __tipc_nl_add_node_links(net, &msg, node, |
| 2237 | &prev_link); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2238 | tipc_node_unlock(node); |
| 2239 | if (err) |
| 2240 | goto out; |
| 2241 | |
| 2242 | prev_node = node->addr; |
| 2243 | } |
| 2244 | } |
| 2245 | done = 1; |
| 2246 | out: |
| 2247 | rcu_read_unlock(); |
| 2248 | |
| 2249 | cb->args[0] = prev_node; |
| 2250 | cb->args[1] = prev_link; |
| 2251 | cb->args[2] = done; |
| 2252 | |
| 2253 | return skb->len; |
| 2254 | } |
| 2255 | |
| 2256 | int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info) |
| 2257 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2258 | struct net *net = genl_info_net(info); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2259 | struct sk_buff *ans_skb; |
| 2260 | struct tipc_nl_msg msg; |
| 2261 | struct tipc_link *link; |
| 2262 | struct tipc_node *node; |
| 2263 | char *name; |
| 2264 | int bearer_id; |
| 2265 | int err; |
| 2266 | |
| 2267 | if (!info->attrs[TIPC_NLA_LINK_NAME]) |
| 2268 | return -EINVAL; |
| 2269 | |
| 2270 | name = nla_data(info->attrs[TIPC_NLA_LINK_NAME]); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2271 | node = tipc_link_find_owner(net, name, &bearer_id); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2272 | if (!node) |
| 2273 | return -EINVAL; |
| 2274 | |
| 2275 | ans_skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 2276 | if (!ans_skb) |
| 2277 | return -ENOMEM; |
| 2278 | |
| 2279 | msg.skb = ans_skb; |
| 2280 | msg.portid = info->snd_portid; |
| 2281 | msg.seq = info->snd_seq; |
| 2282 | |
| 2283 | tipc_node_lock(node); |
| 2284 | link = node->links[bearer_id]; |
| 2285 | if (!link) { |
| 2286 | err = -EINVAL; |
| 2287 | goto err_out; |
| 2288 | } |
| 2289 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2290 | err = __tipc_nl_add_link(net, &msg, link); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2291 | if (err) |
| 2292 | goto err_out; |
| 2293 | |
| 2294 | tipc_node_unlock(node); |
| 2295 | |
| 2296 | return genlmsg_reply(ans_skb, info); |
| 2297 | |
| 2298 | err_out: |
| 2299 | tipc_node_unlock(node); |
| 2300 | nlmsg_free(ans_skb); |
| 2301 | |
| 2302 | return err; |
| 2303 | } |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2304 | |
| 2305 | int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info) |
| 2306 | { |
| 2307 | int err; |
| 2308 | char *link_name; |
| 2309 | unsigned int bearer_id; |
| 2310 | struct tipc_link *link; |
| 2311 | struct tipc_node *node; |
| 2312 | struct nlattr *attrs[TIPC_NLA_LINK_MAX + 1]; |
Richard Alpe | 1817877 | 2015-02-09 09:50:09 +0100 | [diff] [blame] | 2313 | struct net *net = sock_net(skb->sk); |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2314 | |
| 2315 | if (!info->attrs[TIPC_NLA_LINK]) |
| 2316 | return -EINVAL; |
| 2317 | |
| 2318 | err = nla_parse_nested(attrs, TIPC_NLA_LINK_MAX, |
| 2319 | info->attrs[TIPC_NLA_LINK], |
| 2320 | tipc_nl_link_policy); |
| 2321 | if (err) |
| 2322 | return err; |
| 2323 | |
| 2324 | if (!attrs[TIPC_NLA_LINK_NAME]) |
| 2325 | return -EINVAL; |
| 2326 | |
| 2327 | link_name = nla_data(attrs[TIPC_NLA_LINK_NAME]); |
| 2328 | |
| 2329 | if (strcmp(link_name, tipc_bclink_name) == 0) { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 2330 | err = tipc_bclink_reset_stats(net); |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2331 | if (err) |
| 2332 | return err; |
| 2333 | return 0; |
| 2334 | } |
| 2335 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2336 | node = tipc_link_find_owner(net, link_name, &bearer_id); |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2337 | if (!node) |
| 2338 | return -EINVAL; |
| 2339 | |
| 2340 | tipc_node_lock(node); |
| 2341 | |
| 2342 | link = node->links[bearer_id]; |
| 2343 | if (!link) { |
| 2344 | tipc_node_unlock(node); |
| 2345 | return -EINVAL; |
| 2346 | } |
| 2347 | |
| 2348 | link_reset_statistics(link); |
| 2349 | |
| 2350 | tipc_node_unlock(node); |
| 2351 | |
| 2352 | return 0; |
| 2353 | } |