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 ??? */ |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 89 | #define SILENCE_EVT 560817u /* timer dicovered silence from peer */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 90 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 91 | /* |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 92 | * State value stored in 'failover_pkts' |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 93 | */ |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 94 | #define FIRST_FAILOVER 0xffffu |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 95 | |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 96 | static void link_handle_out_of_seq_msg(struct tipc_link *link, |
| 97 | struct sk_buff *skb); |
| 98 | static void tipc_link_proto_rcv(struct tipc_link *link, |
| 99 | struct sk_buff *skb); |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 100 | 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] | 101 | static void link_state_event(struct tipc_link *l_ptr, u32 event); |
| 102 | static void link_reset_statistics(struct tipc_link *l_ptr); |
| 103 | static void link_print(struct tipc_link *l_ptr, const char *str); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 104 | static void tipc_link_sync_xmit(struct tipc_link *l); |
| 105 | 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] | 106 | static void tipc_link_input(struct tipc_link *l, struct sk_buff *skb); |
| 107 | static bool tipc_data_input(struct tipc_link *l, struct sk_buff *skb); |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 108 | static bool tipc_link_failover_rcv(struct tipc_link *l, struct sk_buff **skb); |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 109 | static void link_set_timer(struct tipc_link *link, unsigned long time); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 110 | /* |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 111 | * Simple link routines |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 112 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 113 | static unsigned int align(unsigned int i) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 114 | { |
| 115 | return (i + 3) & ~3u; |
| 116 | } |
| 117 | |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 118 | static void tipc_link_release(struct kref *kref) |
| 119 | { |
| 120 | kfree(container_of(kref, struct tipc_link, ref)); |
| 121 | } |
| 122 | |
| 123 | static void tipc_link_get(struct tipc_link *l_ptr) |
| 124 | { |
| 125 | kref_get(&l_ptr->ref); |
| 126 | } |
| 127 | |
| 128 | static void tipc_link_put(struct tipc_link *l_ptr) |
| 129 | { |
| 130 | kref_put(&l_ptr->ref, tipc_link_release); |
| 131 | } |
| 132 | |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 133 | static struct tipc_link *tipc_parallel_link(struct tipc_link *l) |
| 134 | { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 135 | struct tipc_node *n = l->owner; |
| 136 | |
| 137 | if (node_active_link(n, 0) != l) |
| 138 | return node_active_link(n, 0); |
| 139 | return node_active_link(n, 1); |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 140 | } |
| 141 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 142 | /* |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 143 | * Simple non-static link routines (i.e. referenced outside this file) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 144 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 145 | int tipc_link_is_up(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 146 | { |
| 147 | if (!l_ptr) |
| 148 | return 0; |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 149 | return link_working_working(l_ptr) || link_working_unknown(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 150 | } |
| 151 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 152 | int tipc_link_is_active(struct tipc_link *l) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 153 | { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 154 | struct tipc_node *n = l->owner; |
| 155 | |
| 156 | return (node_active_link(n, 0) == l) || (node_active_link(n, 1) == l); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 160 | * link_timeout - handle expiration of link timer |
| 161 | * @l_ptr: pointer to link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 162 | */ |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 163 | static void link_timeout(unsigned long data) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 164 | { |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 165 | struct tipc_link *l_ptr = (struct tipc_link *)data; |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 166 | struct sk_buff *skb; |
| 167 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 168 | tipc_node_lock(l_ptr->owner); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 169 | |
| 170 | /* update counters used in statistical profiling of send traffic */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 171 | l_ptr->stats.accu_queue_sz += skb_queue_len(&l_ptr->transmq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 172 | l_ptr->stats.queue_sz_counts++; |
| 173 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 174 | skb = skb_peek(&l_ptr->transmq); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 175 | if (skb) { |
| 176 | struct tipc_msg *msg = buf_msg(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 177 | u32 length = msg_size(msg); |
| 178 | |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 179 | if ((msg_user(msg) == MSG_FRAGMENTER) && |
| 180 | (msg_type(msg) == FIRST_FRAGMENT)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 181 | length = msg_size(msg_get_wrapped(msg)); |
| 182 | } |
| 183 | if (length) { |
| 184 | l_ptr->stats.msg_lengths_total += length; |
| 185 | l_ptr->stats.msg_length_counts++; |
| 186 | if (length <= 64) |
| 187 | l_ptr->stats.msg_length_profile[0]++; |
| 188 | else if (length <= 256) |
| 189 | l_ptr->stats.msg_length_profile[1]++; |
| 190 | else if (length <= 1024) |
| 191 | l_ptr->stats.msg_length_profile[2]++; |
| 192 | else if (length <= 4096) |
| 193 | l_ptr->stats.msg_length_profile[3]++; |
| 194 | else if (length <= 16384) |
| 195 | l_ptr->stats.msg_length_profile[4]++; |
| 196 | else if (length <= 32768) |
| 197 | l_ptr->stats.msg_length_profile[5]++; |
| 198 | else |
| 199 | l_ptr->stats.msg_length_profile[6]++; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | /* do all other link processing performed on a periodic basis */ |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 204 | if (l_ptr->silent_intv_cnt || tipc_bclink_acks_missing(l_ptr->owner)) |
| 205 | link_state_event(l_ptr, SILENCE_EVT); |
| 206 | l_ptr->silent_intv_cnt++; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 207 | if (skb_queue_len(&l_ptr->backlogq)) |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 208 | tipc_link_push_packets(l_ptr); |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 209 | link_set_timer(l_ptr, l_ptr->keepalive_intv); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 210 | tipc_node_unlock(l_ptr->owner); |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 211 | tipc_link_put(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 212 | } |
| 213 | |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 214 | static void link_set_timer(struct tipc_link *link, unsigned long time) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 215 | { |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 216 | if (!mod_timer(&link->timer, jiffies + time)) |
| 217 | tipc_link_get(link); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 221 | * tipc_link_create - create a new link |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 222 | * @n_ptr: pointer to associated node |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 223 | * @b_ptr: pointer to associated bearer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 224 | * @media_addr: media address to use when sending messages over link |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 225 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 226 | * Returns pointer to link. |
| 227 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 228 | struct tipc_link *tipc_link_create(struct tipc_node *n_ptr, |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 229 | struct tipc_bearer *b_ptr, |
Jon Paul Maloy | d39bbd4 | 2015-07-16 16:54:21 -0400 | [diff] [blame] | 230 | const struct tipc_media_addr *media_addr, |
| 231 | struct sk_buff_head *inputq, |
| 232 | struct sk_buff_head *namedq) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 233 | { |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 234 | struct tipc_net *tn = net_generic(n_ptr->net, tipc_net_id); |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 235 | struct tipc_link *l_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 236 | struct tipc_msg *msg; |
| 237 | char *if_name; |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 238 | char addr_string[16]; |
| 239 | u32 peer = n_ptr->addr; |
| 240 | |
Holger Brunck | 0372bf5 | 2014-11-14 18:33:19 +0100 | [diff] [blame] | 241 | if (n_ptr->link_cnt >= MAX_BEARERS) { |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 242 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 243 | pr_err("Cannot establish %uth link to %s. Max %u allowed.\n", |
| 244 | n_ptr->link_cnt, addr_string, MAX_BEARERS); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 245 | return NULL; |
| 246 | } |
| 247 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 248 | if (n_ptr->links[b_ptr->identity].link) { |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 249 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 250 | pr_err("Attempt to establish second link on <%s> to %s\n", |
| 251 | b_ptr->name, addr_string); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 252 | return NULL; |
| 253 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 254 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 255 | l_ptr = kzalloc(sizeof(*l_ptr), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 256 | if (!l_ptr) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 257 | pr_warn("Link creation failed, no memory\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 258 | return NULL; |
| 259 | } |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 260 | kref_init(&l_ptr->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 261 | l_ptr->addr = peer; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 262 | if_name = strchr(b_ptr->name, ':') + 1; |
Allan Stephens | 062b4c9 | 2011-04-07 09:28:47 -0400 | [diff] [blame] | 263 | sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:unknown", |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 264 | tipc_zone(tn->own_addr), tipc_cluster(tn->own_addr), |
| 265 | tipc_node(tn->own_addr), |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 266 | if_name, |
| 267 | tipc_zone(peer), tipc_cluster(peer), tipc_node(peer)); |
Allan Stephens | 062b4c9 | 2011-04-07 09:28:47 -0400 | [diff] [blame] | 268 | /* note: peer i/f name is updated by reset/activate message */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 269 | memcpy(&l_ptr->media_addr, media_addr, sizeof(*media_addr)); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 270 | l_ptr->owner = n_ptr; |
Allan Stephens | f882cb7 | 2011-04-07 09:43:27 -0400 | [diff] [blame] | 271 | l_ptr->peer_session = INVALID_SESSION; |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 272 | l_ptr->bearer_id = b_ptr->identity; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 273 | link_set_supervision_props(l_ptr, b_ptr->tolerance); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 274 | l_ptr->state = RESET_UNKNOWN; |
| 275 | |
| 276 | l_ptr->pmsg = (struct tipc_msg *)&l_ptr->proto_msg; |
| 277 | msg = l_ptr->pmsg; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 278 | 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] | 279 | l_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 280 | msg_set_size(msg, sizeof(l_ptr->proto_msg)); |
Ying Xue | bafa29e | 2015-01-09 15:27:12 +0800 | [diff] [blame] | 281 | msg_set_session(msg, (tn->random & 0xffff)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 282 | msg_set_bearer_id(msg, b_ptr->identity); |
| 283 | strcpy((char *)msg_data(msg), if_name); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 284 | l_ptr->net_plane = b_ptr->net_plane; |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 285 | l_ptr->advertised_mtu = b_ptr->mtu; |
| 286 | l_ptr->mtu = l_ptr->advertised_mtu; |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 287 | l_ptr->priority = b_ptr->priority; |
| 288 | tipc_link_set_queue_limits(l_ptr, b_ptr->window); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 289 | l_ptr->snd_nxt = 1; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 290 | __skb_queue_head_init(&l_ptr->transmq); |
| 291 | __skb_queue_head_init(&l_ptr->backlogq); |
| 292 | __skb_queue_head_init(&l_ptr->deferdq); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 293 | skb_queue_head_init(&l_ptr->wakeupq); |
Jon Paul Maloy | d39bbd4 | 2015-07-16 16:54:21 -0400 | [diff] [blame] | 294 | l_ptr->inputq = inputq; |
| 295 | l_ptr->namedq = namedq; |
| 296 | skb_queue_head_init(l_ptr->inputq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 297 | link_reset_statistics(l_ptr); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 298 | tipc_node_attach_link(n_ptr, l_ptr); |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 299 | setup_timer(&l_ptr->timer, link_timeout, (unsigned long)l_ptr); |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 300 | link_state_event(l_ptr, STARTING_EVT); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 301 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 302 | return l_ptr; |
| 303 | } |
| 304 | |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 305 | /** |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 306 | * tipc_link_delete - Delete a link |
| 307 | * @l: link to be deleted |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 308 | */ |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 309 | void tipc_link_delete(struct tipc_link *l) |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 310 | { |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 311 | tipc_link_reset(l); |
| 312 | if (del_timer(&l->timer)) |
| 313 | tipc_link_put(l); |
| 314 | l->flags |= LINK_STOPPED; |
| 315 | /* Delete link now, or when timer is finished: */ |
| 316 | tipc_link_reset_fragments(l); |
| 317 | tipc_node_detach_link(l->owner, l); |
| 318 | tipc_link_put(l); |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 319 | } |
| 320 | |
Jon Paul Maloy | b1c29f6 | 2015-05-14 10:46:11 -0400 | [diff] [blame] | 321 | void tipc_link_delete_list(struct net *net, unsigned int bearer_id) |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 322 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 323 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 324 | struct tipc_link *link; |
| 325 | struct tipc_node *node; |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 326 | |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 327 | rcu_read_lock(); |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 328 | list_for_each_entry_rcu(node, &tn->node_list, list) { |
| 329 | tipc_node_lock(node); |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 330 | link = node->links[bearer_id].link; |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 331 | if (link) |
Jon Paul Maloy | 2d72d49 | 2015-02-03 08:59:17 -0500 | [diff] [blame] | 332 | tipc_link_delete(link); |
| 333 | tipc_node_unlock(node); |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 334 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 335 | rcu_read_unlock(); |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 336 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 337 | |
| 338 | /** |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 339 | * link_schedule_user - schedule a message sender for wakeup after congestion |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 340 | * @link: congested link |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 341 | * @list: message that was attempted sent |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 342 | * Create pseudo msg to send back to user when congestion abates |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 343 | * Does not consume buffer list |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 344 | */ |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 345 | 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] | 346 | { |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 347 | struct tipc_msg *msg = buf_msg(skb_peek(list)); |
| 348 | int imp = msg_importance(msg); |
| 349 | u32 oport = msg_origport(msg); |
| 350 | u32 addr = link_own_addr(link); |
| 351 | struct sk_buff *skb; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 352 | |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 353 | /* This really cannot happen... */ |
| 354 | if (unlikely(imp > TIPC_CRITICAL_IMPORTANCE)) { |
| 355 | pr_warn("%s<%s>, send queue full", link_rst_msg, link->name); |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 356 | return -ENOBUFS; |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 357 | } |
| 358 | /* Non-blocking sender: */ |
| 359 | if (TIPC_SKB_CB(skb_peek(list))->wakeup_pending) |
| 360 | return -ELINKCONG; |
| 361 | |
| 362 | /* Create and schedule wakeup pseudo message */ |
| 363 | skb = tipc_msg_create(SOCK_WAKEUP, 0, INT_H_SIZE, 0, |
| 364 | addr, addr, oport, 0, 0); |
| 365 | if (!skb) |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 366 | return -ENOBUFS; |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 367 | TIPC_SKB_CB(skb)->chain_sz = skb_queue_len(list); |
| 368 | TIPC_SKB_CB(skb)->chain_imp = imp; |
| 369 | skb_queue_tail(&link->wakeupq, skb); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 370 | link->stats.link_congs++; |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 371 | return -ELINKCONG; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 372 | } |
| 373 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 374 | /** |
| 375 | * link_prepare_wakeup - prepare users for wakeup after congestion |
| 376 | * @link: congested link |
| 377 | * Move a number of waiting users, as permitted by available space in |
| 378 | * the send queue, from link wait queue to node wait queue for wakeup |
| 379 | */ |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 380 | void link_prepare_wakeup(struct tipc_link *l) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 381 | { |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 382 | int pnd[TIPC_SYSTEM_IMPORTANCE + 1] = {0,}; |
| 383 | int imp, lim; |
Ying Xue | 58d78b3 | 2014-11-26 11:41:51 +0800 | [diff] [blame] | 384 | struct sk_buff *skb, *tmp; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 385 | |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 386 | skb_queue_walk_safe(&l->wakeupq, skb, tmp) { |
| 387 | imp = TIPC_SKB_CB(skb)->chain_imp; |
| 388 | lim = l->window + l->backlog[imp].limit; |
| 389 | pnd[imp] += TIPC_SKB_CB(skb)->chain_sz; |
| 390 | if ((pnd[imp] + l->backlog[imp].len) >= lim) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 391 | break; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 392 | skb_unlink(skb, &l->wakeupq); |
Jon Paul Maloy | d39bbd4 | 2015-07-16 16:54:21 -0400 | [diff] [blame] | 393 | skb_queue_tail(l->inputq, skb); |
| 394 | l->owner->inputq = l->inputq; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 395 | l->owner->action_flags |= TIPC_MSG_EVT; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 396 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 397 | } |
| 398 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 399 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 400 | * tipc_link_reset_fragments - purge link's inbound message fragments queue |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 401 | * @l_ptr: pointer to link |
| 402 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 403 | void tipc_link_reset_fragments(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 404 | { |
Jon Paul Maloy | 37e2216 | 2014-05-14 05:39:12 -0400 | [diff] [blame] | 405 | kfree_skb(l_ptr->reasm_buf); |
| 406 | l_ptr->reasm_buf = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 407 | } |
| 408 | |
Jon Paul Maloy | 7d967b6 | 2015-06-28 09:44:44 -0400 | [diff] [blame] | 409 | void tipc_link_purge_backlog(struct tipc_link *l) |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 410 | { |
| 411 | __skb_queue_purge(&l->backlogq); |
| 412 | l->backlog[TIPC_LOW_IMPORTANCE].len = 0; |
| 413 | l->backlog[TIPC_MEDIUM_IMPORTANCE].len = 0; |
| 414 | l->backlog[TIPC_HIGH_IMPORTANCE].len = 0; |
| 415 | l->backlog[TIPC_CRITICAL_IMPORTANCE].len = 0; |
| 416 | l->backlog[TIPC_SYSTEM_IMPORTANCE].len = 0; |
| 417 | } |
| 418 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 419 | /** |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 420 | * tipc_link_purge_queues - purge all pkt queues associated with link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 421 | * @l_ptr: pointer to link |
| 422 | */ |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 423 | void tipc_link_purge_queues(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 424 | { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 425 | __skb_queue_purge(&l_ptr->deferdq); |
| 426 | __skb_queue_purge(&l_ptr->transmq); |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 427 | tipc_link_purge_backlog(l_ptr); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 428 | tipc_link_reset_fragments(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 429 | } |
| 430 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 431 | void tipc_link_reset(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 432 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 433 | u32 prev_state = l_ptr->state; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 434 | int was_active_link = tipc_link_is_active(l_ptr); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 435 | struct tipc_node *owner = l_ptr->owner; |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 436 | struct tipc_link *pl = tipc_parallel_link(l_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 437 | |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 438 | 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] | 439 | |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 440 | /* Link is down, accept any session */ |
| 441 | l_ptr->peer_session = INVALID_SESSION; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 442 | |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 443 | /* Prepare for renewed mtu size negotiation */ |
| 444 | l_ptr->mtu = l_ptr->advertised_mtu; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 445 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 446 | l_ptr->state = RESET_UNKNOWN; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 447 | |
| 448 | if ((prev_state == RESET_UNKNOWN) || (prev_state == RESET_RESET)) |
| 449 | return; |
| 450 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 451 | tipc_node_link_down(l_ptr->owner, l_ptr->bearer_id); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 452 | 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] | 453 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 454 | if (was_active_link && tipc_node_is_up(l_ptr->owner) && (pl != l_ptr)) { |
| 455 | l_ptr->flags |= LINK_FAILINGOVER; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 456 | l_ptr->failover_checkpt = l_ptr->rcv_nxt; |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 457 | pl->failover_pkts = FIRST_FAILOVER; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 458 | pl->failover_checkpt = l_ptr->rcv_nxt; |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 459 | pl->failover_skb = l_ptr->reasm_buf; |
| 460 | } else { |
| 461 | kfree_skb(l_ptr->reasm_buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 462 | } |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 463 | /* Clean up all queues, except inputq: */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 464 | __skb_queue_purge(&l_ptr->transmq); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 465 | __skb_queue_purge(&l_ptr->deferdq); |
Jon Paul Maloy | e6441ba | 2015-03-09 16:16:22 -0400 | [diff] [blame] | 466 | if (!owner->inputq) |
Jon Paul Maloy | d39bbd4 | 2015-07-16 16:54:21 -0400 | [diff] [blame] | 467 | owner->inputq = l_ptr->inputq; |
Jon Paul Maloy | e6441ba | 2015-03-09 16:16:22 -0400 | [diff] [blame] | 468 | skb_queue_splice_init(&l_ptr->wakeupq, owner->inputq); |
| 469 | if (!skb_queue_empty(owner->inputq)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 470 | owner->action_flags |= TIPC_MSG_EVT; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 471 | tipc_link_purge_backlog(l_ptr); |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 472 | l_ptr->reasm_buf = NULL; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 473 | l_ptr->rcv_unacked = 0; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 474 | l_ptr->snd_nxt = 1; |
| 475 | l_ptr->silent_intv_cnt = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 476 | l_ptr->stale_count = 0; |
| 477 | link_reset_statistics(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 478 | } |
| 479 | |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 480 | static void link_activate(struct tipc_link *link) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 481 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 482 | struct tipc_node *node = link->owner; |
| 483 | |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 484 | link->rcv_nxt = 1; |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 485 | link->stats.recv_info = 1; |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 486 | link->silent_intv_cnt = 0; |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 487 | tipc_node_link_up(node, link->bearer_id); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 488 | tipc_bearer_add_dest(node->net, link->bearer_id, link->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | /** |
| 492 | * link_state_event - link finite state machine |
| 493 | * @l_ptr: pointer to link |
| 494 | * @event: state machine event to process |
| 495 | */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 496 | 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] | 497 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 498 | struct tipc_link *other; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 499 | unsigned long timer_intv = l_ptr->keepalive_intv; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 500 | |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 501 | if (l_ptr->flags & LINK_STOPPED) |
| 502 | return; |
| 503 | |
Ying Xue | 135daee | 2014-02-13 17:29:08 -0500 | [diff] [blame] | 504 | if (!(l_ptr->flags & LINK_STARTED) && (event != STARTING_EVT)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 505 | return; /* Not yet. */ |
| 506 | |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 507 | if (l_ptr->flags & LINK_FAILINGOVER) |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 508 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 509 | |
| 510 | switch (l_ptr->state) { |
| 511 | case WORKING_WORKING: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 512 | switch (event) { |
| 513 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 514 | case ACTIVATE_MSG: |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 515 | l_ptr->silent_intv_cnt = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 516 | break; |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 517 | case SILENCE_EVT: |
| 518 | if (!l_ptr->silent_intv_cnt) { |
| 519 | if (tipc_bclink_acks_missing(l_ptr->owner)) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 520 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 521 | 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 522 | break; |
| 523 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 524 | l_ptr->state = WORKING_UNKNOWN; |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 525 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 526 | break; |
| 527 | case RESET_MSG: |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 528 | pr_debug("%s<%s>, requested by peer\n", |
| 529 | link_rst_msg, l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 530 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 531 | l_ptr->state = RESET_RESET; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 532 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 533 | 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 534 | break; |
| 535 | default: |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 536 | pr_debug("%s%u in WW state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 537 | } |
| 538 | break; |
| 539 | case WORKING_UNKNOWN: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 540 | switch (event) { |
| 541 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 542 | case ACTIVATE_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 543 | l_ptr->state = WORKING_WORKING; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 544 | l_ptr->silent_intv_cnt = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 545 | break; |
| 546 | case RESET_MSG: |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 547 | pr_debug("%s<%s>, requested by peer while probing\n", |
| 548 | link_rst_msg, l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 549 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 550 | l_ptr->state = RESET_RESET; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 551 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 552 | 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 553 | break; |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 554 | case SILENCE_EVT: |
| 555 | if (!l_ptr->silent_intv_cnt) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 556 | l_ptr->state = WORKING_WORKING; |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 557 | if (tipc_bclink_acks_missing(l_ptr->owner)) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 558 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 559 | 0, 0, 0, 0); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 560 | } else if (l_ptr->silent_intv_cnt < |
| 561 | l_ptr->abort_limit) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 562 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 563 | 1, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 564 | } else { /* Link has failed */ |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 565 | pr_debug("%s<%s>, peer not responding\n", |
| 566 | link_rst_msg, l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 567 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 568 | l_ptr->state = RESET_UNKNOWN; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 569 | tipc_link_proto_xmit(l_ptr, RESET_MSG, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 570 | 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 571 | } |
| 572 | break; |
| 573 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 574 | pr_err("%s%u in WU state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 575 | } |
| 576 | break; |
| 577 | case RESET_UNKNOWN: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 578 | switch (event) { |
| 579 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 580 | break; |
| 581 | case ACTIVATE_MSG: |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 582 | other = node_active_link(l_ptr->owner, 0); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 583 | if (other && link_working_unknown(other)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 584 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 585 | l_ptr->state = WORKING_WORKING; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 586 | link_activate(l_ptr); |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 587 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0); |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 588 | if (l_ptr->owner->working_links == 1) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 589 | tipc_link_sync_xmit(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 590 | break; |
| 591 | case RESET_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 592 | l_ptr->state = RESET_RESET; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 593 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 594 | 1, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 595 | break; |
| 596 | case STARTING_EVT: |
Ying Xue | 135daee | 2014-02-13 17:29:08 -0500 | [diff] [blame] | 597 | l_ptr->flags |= LINK_STARTED; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 598 | link_set_timer(l_ptr, timer_intv); |
Jon Paul Maloy | af9946f | 2015-02-03 08:59:20 -0500 | [diff] [blame] | 599 | break; |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 600 | case SILENCE_EVT: |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 601 | tipc_link_proto_xmit(l_ptr, RESET_MSG, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 602 | break; |
| 603 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 604 | pr_err("%s%u in RU state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 605 | } |
| 606 | break; |
| 607 | case RESET_RESET: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 608 | switch (event) { |
| 609 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 610 | case ACTIVATE_MSG: |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 611 | other = node_active_link(l_ptr->owner, 0); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 612 | if (other && link_working_unknown(other)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 613 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 614 | l_ptr->state = WORKING_WORKING; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 615 | link_activate(l_ptr); |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 616 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0); |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 617 | if (l_ptr->owner->working_links == 1) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 618 | tipc_link_sync_xmit(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 619 | break; |
| 620 | case RESET_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 621 | break; |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 622 | case SILENCE_EVT: |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 623 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 624 | 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 625 | break; |
| 626 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 627 | pr_err("%s%u in RR state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 628 | } |
| 629 | break; |
| 630 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 631 | pr_err("Unknown link state %u/%u\n", l_ptr->state, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 632 | } |
| 633 | } |
| 634 | |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 635 | /** |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 636 | * __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] | 637 | * @link: link to use |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 638 | * @list: chain of buffers containing message |
| 639 | * |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 640 | * Consumes the buffer chain, except when returning an error code, |
Jon Paul Maloy | 3127a02 | 2015-03-25 12:07:25 -0400 | [diff] [blame] | 641 | * Returns 0 if success, or errno: -ELINKCONG, -EMSGSIZE or -ENOBUFS |
| 642 | * Messages at TIPC_SYSTEM_IMPORTANCE are always accepted |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 643 | */ |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 644 | int __tipc_link_xmit(struct net *net, struct tipc_link *link, |
| 645 | struct sk_buff_head *list) |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 646 | { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 647 | struct tipc_msg *msg = buf_msg(skb_peek(list)); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 648 | unsigned int maxwin = link->window; |
Jon Paul Maloy | f21e897 | 2015-05-14 10:46:17 -0400 | [diff] [blame] | 649 | unsigned int i, imp = msg_importance(msg); |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 650 | uint mtu = link->mtu; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 651 | u16 ack = mod(link->rcv_nxt - 1); |
| 652 | u16 seqno = link->snd_nxt; |
Jon Paul Maloy | e4bf4f7 | 2015-05-14 10:46:14 -0400 | [diff] [blame] | 653 | u16 bc_last_in = link->owner->bclink.last_in; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 654 | struct tipc_media_addr *addr = &link->media_addr; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 655 | struct sk_buff_head *transmq = &link->transmq; |
| 656 | struct sk_buff_head *backlogq = &link->backlogq; |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 657 | struct sk_buff *skb, *bskb; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 658 | |
Jon Paul Maloy | f21e897 | 2015-05-14 10:46:17 -0400 | [diff] [blame] | 659 | /* Match msg importance against this and all higher backlog limits: */ |
| 660 | for (i = imp; i <= TIPC_SYSTEM_IMPORTANCE; i++) { |
| 661 | if (unlikely(link->backlog[i].len >= link->backlog[i].limit)) |
| 662 | return link_schedule_user(link, list); |
| 663 | } |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 664 | if (unlikely(msg_size(msg) > mtu)) |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 665 | return -EMSGSIZE; |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 666 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 667 | /* Prepare each packet for sending, and add to relevant queue: */ |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 668 | while (skb_queue_len(list)) { |
| 669 | skb = skb_peek(list); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 670 | msg = buf_msg(skb); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 671 | msg_set_seqno(msg, seqno); |
| 672 | msg_set_ack(msg, ack); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 673 | msg_set_bcast_ack(msg, bc_last_in); |
| 674 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 675 | if (likely(skb_queue_len(transmq) < maxwin)) { |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 676 | __skb_dequeue(list); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 677 | __skb_queue_tail(transmq, skb); |
| 678 | tipc_bearer_send(net, link->bearer_id, skb, addr); |
| 679 | link->rcv_unacked = 0; |
| 680 | seqno++; |
| 681 | continue; |
| 682 | } |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 683 | if (tipc_msg_bundle(skb_peek_tail(backlogq), msg, mtu)) { |
| 684 | kfree_skb(__skb_dequeue(list)); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 685 | link->stats.sent_bundled++; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 686 | continue; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 687 | } |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 688 | if (tipc_msg_make_bundle(&bskb, msg, mtu, link->addr)) { |
| 689 | kfree_skb(__skb_dequeue(list)); |
| 690 | __skb_queue_tail(backlogq, bskb); |
| 691 | link->backlog[msg_importance(buf_msg(bskb))].len++; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 692 | link->stats.sent_bundled++; |
| 693 | link->stats.sent_bundles++; |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 694 | continue; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 695 | } |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 696 | link->backlog[imp].len += skb_queue_len(list); |
| 697 | skb_queue_splice_tail_init(list, backlogq); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 698 | } |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 699 | link->snd_nxt = seqno; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 700 | return 0; |
| 701 | } |
| 702 | |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame^] | 703 | /** |
| 704 | * tipc_link_xmit(): enqueue buffer list according to queue situation |
| 705 | * @link: link to use |
| 706 | * @list: chain of buffers containing message |
| 707 | * @xmitq: returned list of packets to be sent by caller |
| 708 | * |
| 709 | * Consumes the buffer chain, except when returning -ELINKCONG, |
| 710 | * since the caller then may want to make more send attempts. |
| 711 | * Returns 0 if success, or errno: -ELINKCONG, -EMSGSIZE or -ENOBUFS |
| 712 | * Messages at TIPC_SYSTEM_IMPORTANCE are always accepted |
| 713 | */ |
| 714 | int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list, |
| 715 | struct sk_buff_head *xmitq) |
| 716 | { |
| 717 | struct tipc_msg *hdr = buf_msg(skb_peek(list)); |
| 718 | unsigned int maxwin = l->window; |
| 719 | unsigned int i, imp = msg_importance(hdr); |
| 720 | unsigned int mtu = l->mtu; |
| 721 | u16 ack = l->rcv_nxt - 1; |
| 722 | u16 seqno = l->snd_nxt; |
| 723 | u16 bc_last_in = l->owner->bclink.last_in; |
| 724 | struct sk_buff_head *transmq = &l->transmq; |
| 725 | struct sk_buff_head *backlogq = &l->backlogq; |
| 726 | struct sk_buff *skb, *_skb, *bskb; |
| 727 | |
| 728 | /* Match msg importance against this and all higher backlog limits: */ |
| 729 | for (i = imp; i <= TIPC_SYSTEM_IMPORTANCE; i++) { |
| 730 | if (unlikely(l->backlog[i].len >= l->backlog[i].limit)) |
| 731 | return link_schedule_user(l, list); |
| 732 | } |
| 733 | if (unlikely(msg_size(hdr) > mtu)) |
| 734 | return -EMSGSIZE; |
| 735 | |
| 736 | /* Prepare each packet for sending, and add to relevant queue: */ |
| 737 | while (skb_queue_len(list)) { |
| 738 | skb = skb_peek(list); |
| 739 | hdr = buf_msg(skb); |
| 740 | msg_set_seqno(hdr, seqno); |
| 741 | msg_set_ack(hdr, ack); |
| 742 | msg_set_bcast_ack(hdr, bc_last_in); |
| 743 | |
| 744 | if (likely(skb_queue_len(transmq) < maxwin)) { |
| 745 | _skb = skb_clone(skb, GFP_ATOMIC); |
| 746 | if (!_skb) |
| 747 | return -ENOBUFS; |
| 748 | __skb_dequeue(list); |
| 749 | __skb_queue_tail(transmq, skb); |
| 750 | __skb_queue_tail(xmitq, _skb); |
| 751 | l->rcv_unacked = 0; |
| 752 | seqno++; |
| 753 | continue; |
| 754 | } |
| 755 | if (tipc_msg_bundle(skb_peek_tail(backlogq), hdr, mtu)) { |
| 756 | kfree_skb(__skb_dequeue(list)); |
| 757 | l->stats.sent_bundled++; |
| 758 | continue; |
| 759 | } |
| 760 | if (tipc_msg_make_bundle(&bskb, hdr, mtu, l->addr)) { |
| 761 | kfree_skb(__skb_dequeue(list)); |
| 762 | __skb_queue_tail(backlogq, bskb); |
| 763 | l->backlog[msg_importance(buf_msg(bskb))].len++; |
| 764 | l->stats.sent_bundled++; |
| 765 | l->stats.sent_bundles++; |
| 766 | continue; |
| 767 | } |
| 768 | l->backlog[imp].len += skb_queue_len(list); |
| 769 | skb_queue_splice_tail_init(list, backlogq); |
| 770 | } |
| 771 | l->snd_nxt = seqno; |
| 772 | return 0; |
| 773 | } |
| 774 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 775 | static void skb2list(struct sk_buff *skb, struct sk_buff_head *list) |
| 776 | { |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 777 | skb_queue_head_init(list); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 778 | __skb_queue_tail(list, skb); |
| 779 | } |
| 780 | |
| 781 | static int __tipc_link_xmit_skb(struct tipc_link *link, struct sk_buff *skb) |
| 782 | { |
| 783 | struct sk_buff_head head; |
| 784 | |
| 785 | skb2list(skb, &head); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 786 | return __tipc_link_xmit(link->owner->net, link, &head); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 787 | } |
| 788 | |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 789 | /* |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 790 | * tipc_link_sync_xmit - synchronize broadcast link endpoints. |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 791 | * |
| 792 | * Give a newly added peer node the sequence number where it should |
| 793 | * start receiving and acking broadcast packets. |
| 794 | * |
| 795 | * Called with node locked |
| 796 | */ |
Jon Paul Maloy | 25b660c | 2014-07-16 20:40:59 -0400 | [diff] [blame] | 797 | static void tipc_link_sync_xmit(struct tipc_link *link) |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 798 | { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 799 | struct sk_buff *skb; |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 800 | struct tipc_msg *msg; |
| 801 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 802 | skb = tipc_buf_acquire(INT_H_SIZE); |
| 803 | if (!skb) |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 804 | return; |
| 805 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 806 | msg = buf_msg(skb); |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 807 | tipc_msg_init(link_own_addr(link), msg, BCAST_PROTOCOL, STATE_MSG, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 808 | INT_H_SIZE, link->addr); |
Jon Paul Maloy | 25b660c | 2014-07-16 20:40:59 -0400 | [diff] [blame] | 809 | msg_set_last_bcast(msg, link->owner->bclink.acked); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 810 | __tipc_link_xmit_skb(link, skb); |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | /* |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 814 | * tipc_link_sync_rcv - synchronize broadcast link endpoints. |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 815 | * Receive the sequence number where we should start receiving and |
| 816 | * acking broadcast packets from a newly added peer node, and open |
| 817 | * up for reception of such packets. |
| 818 | * |
| 819 | * Called with node locked |
| 820 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 821 | 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] | 822 | { |
| 823 | struct tipc_msg *msg = buf_msg(buf); |
| 824 | |
| 825 | n->bclink.last_sent = n->bclink.last_in = msg_last_bcast(msg); |
| 826 | n->bclink.recv_permitted = true; |
| 827 | kfree_skb(buf); |
| 828 | } |
| 829 | |
| 830 | /* |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 831 | * tipc_link_push_packets - push unsent packets to bearer |
| 832 | * |
| 833 | * Push out the unsent messages of a link where congestion |
| 834 | * has abated. Node is locked. |
| 835 | * |
| 836 | * Called with node locked |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 837 | */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 838 | void tipc_link_push_packets(struct tipc_link *link) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 839 | { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 840 | struct sk_buff *skb; |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 841 | struct tipc_msg *msg; |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 842 | u16 seqno = link->snd_nxt; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 843 | u16 ack = mod(link->rcv_nxt - 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 844 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 845 | while (skb_queue_len(&link->transmq) < link->window) { |
| 846 | skb = __skb_dequeue(&link->backlogq); |
| 847 | if (!skb) |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 848 | break; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 849 | msg = buf_msg(skb); |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 850 | link->backlog[msg_importance(msg)].len--; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 851 | msg_set_ack(msg, ack); |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 852 | msg_set_seqno(msg, seqno); |
| 853 | seqno = mod(seqno + 1); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 854 | msg_set_bcast_ack(msg, link->owner->bclink.last_in); |
| 855 | link->rcv_unacked = 0; |
| 856 | __skb_queue_tail(&link->transmq, skb); |
| 857 | tipc_bearer_send(link->owner->net, link->bearer_id, |
| 858 | skb, &link->media_addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 859 | } |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 860 | link->snd_nxt = seqno; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 861 | } |
| 862 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 863 | void tipc_link_reset_all(struct tipc_node *node) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 864 | { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 865 | char addr_string[16]; |
| 866 | u32 i; |
| 867 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 868 | tipc_node_lock(node); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 869 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 870 | pr_warn("Resetting all links to %s\n", |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 871 | tipc_addr_string_fill(addr_string, node->addr)); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 872 | |
| 873 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 874 | if (node->links[i].link) { |
| 875 | link_print(node->links[i].link, "Resetting link\n"); |
| 876 | tipc_link_reset(node->links[i].link); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 877 | } |
| 878 | } |
| 879 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 880 | tipc_node_unlock(node); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 881 | } |
| 882 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 883 | static void link_retransmit_failure(struct tipc_link *l_ptr, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 884 | struct sk_buff *buf) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 885 | { |
| 886 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 887 | struct net *net = l_ptr->owner->net; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 888 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 889 | pr_warn("Retransmission failure on link <%s>\n", l_ptr->name); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 890 | |
| 891 | if (l_ptr->addr) { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 892 | /* Handle failure on standard link */ |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 893 | link_print(l_ptr, "Resetting link\n"); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 894 | tipc_link_reset(l_ptr); |
| 895 | |
| 896 | } else { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 897 | /* Handle failure on broadcast link */ |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 898 | struct tipc_node *n_ptr; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 899 | char addr_string[16]; |
| 900 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 901 | pr_info("Msg seq number: %u, ", msg_seqno(msg)); |
| 902 | pr_cont("Outstanding acks: %lu\n", |
| 903 | (unsigned long) TIPC_SKB_CB(buf)->handle); |
Jeff Garzik | 617dbea | 2006-10-03 16:25:34 -0700 | [diff] [blame] | 904 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 905 | n_ptr = tipc_bclink_retransmit_to(net); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 906 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 907 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 908 | pr_info("Broadcast link info for %s\n", addr_string); |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 909 | pr_info("Reception permitted: %d, Acked: %u\n", |
| 910 | n_ptr->bclink.recv_permitted, |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 911 | n_ptr->bclink.acked); |
| 912 | pr_info("Last in: %u, Oos state: %u, Last sent: %u\n", |
| 913 | n_ptr->bclink.last_in, |
| 914 | n_ptr->bclink.oos_state, |
| 915 | n_ptr->bclink.last_sent); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 916 | |
Ying Xue | b952b2b | 2015-03-26 18:10:23 +0800 | [diff] [blame] | 917 | n_ptr->action_flags |= TIPC_BCAST_RESET; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 918 | l_ptr->stale_count = 0; |
| 919 | } |
| 920 | } |
| 921 | |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 922 | 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] | 923 | u32 retransmits) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 924 | { |
| 925 | struct tipc_msg *msg; |
| 926 | |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 927 | if (!skb) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 928 | return; |
| 929 | |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 930 | msg = buf_msg(skb); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 931 | |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 932 | /* Detect repeated retransmit failures */ |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 933 | if (l_ptr->last_retransm == msg_seqno(msg)) { |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 934 | if (++l_ptr->stale_count > 100) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 935 | link_retransmit_failure(l_ptr, skb); |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 936 | return; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 937 | } |
| 938 | } else { |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 939 | l_ptr->last_retransm = msg_seqno(msg); |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 940 | l_ptr->stale_count = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 941 | } |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 942 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 943 | skb_queue_walk_from(&l_ptr->transmq, skb) { |
| 944 | if (!retransmits) |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 945 | break; |
| 946 | msg = buf_msg(skb); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 947 | msg_set_ack(msg, mod(l_ptr->rcv_nxt - 1)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 948 | msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 949 | tipc_bearer_send(l_ptr->owner->net, l_ptr->bearer_id, skb, |
| 950 | &l_ptr->media_addr); |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 951 | retransmits--; |
| 952 | l_ptr->stats.retransmitted++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 953 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 954 | } |
| 955 | |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 956 | /* link_synch(): check if all packets arrived before the synch |
| 957 | * point have been consumed |
| 958 | * Returns true if the parallel links are synched, otherwise false |
| 959 | */ |
| 960 | static bool link_synch(struct tipc_link *l) |
| 961 | { |
| 962 | unsigned int post_synch; |
| 963 | struct tipc_link *pl; |
| 964 | |
| 965 | pl = tipc_parallel_link(l); |
| 966 | if (pl == l) |
| 967 | goto synched; |
| 968 | |
| 969 | /* Was last pre-synch packet added to input queue ? */ |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 970 | if (less_eq(pl->rcv_nxt, l->synch_point)) |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 971 | return false; |
| 972 | |
| 973 | /* Is it still in the input queue ? */ |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 974 | post_synch = mod(pl->rcv_nxt - l->synch_point) - 1; |
Jon Paul Maloy | d39bbd4 | 2015-07-16 16:54:21 -0400 | [diff] [blame] | 975 | if (skb_queue_len(pl->inputq) > post_synch) |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 976 | return false; |
| 977 | synched: |
| 978 | l->flags &= ~LINK_SYNCHING; |
| 979 | return true; |
| 980 | } |
| 981 | |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 982 | static void link_retrieve_defq(struct tipc_link *link, |
| 983 | struct sk_buff_head *list) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 984 | { |
Jon Paul Maloy | e4bf4f7 | 2015-05-14 10:46:14 -0400 | [diff] [blame] | 985 | u16 seq_no; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 986 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 987 | if (skb_queue_empty(&link->deferdq)) |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 988 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 989 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 990 | seq_no = buf_seqno(skb_peek(&link->deferdq)); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 991 | if (seq_no == link->rcv_nxt) |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 992 | skb_queue_splice_tail_init(&link->deferdq, list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 993 | } |
| 994 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 995 | /** |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 996 | * tipc_rcv - process TIPC packets/messages arriving from off-node |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 997 | * @net: the applicable net namespace |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 998 | * @skb: TIPC packet |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 999 | * @b_ptr: pointer to bearer message arrived on |
Allan Stephens | b02b69c | 2010-08-17 11:00:07 +0000 | [diff] [blame] | 1000 | * |
| 1001 | * Invoked with no locks held. Bearer pointer must point to a valid bearer |
| 1002 | * structure (i.e. cannot be NULL), but bearer can be inactive. |
| 1003 | */ |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 1004 | 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] | 1005 | { |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 1006 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1007 | struct sk_buff_head head; |
| 1008 | struct tipc_node *n_ptr; |
| 1009 | struct tipc_link *l_ptr; |
| 1010 | struct sk_buff *skb1, *tmp; |
| 1011 | struct tipc_msg *msg; |
Jon Paul Maloy | e4bf4f7 | 2015-05-14 10:46:14 -0400 | [diff] [blame] | 1012 | u16 seq_no; |
| 1013 | u16 ackd; |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1014 | u32 released; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1015 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1016 | skb2list(skb, &head); |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1017 | |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1018 | while ((skb = __skb_dequeue(&head))) { |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1019 | /* Ensure message is well-formed */ |
Jon Paul Maloy | cf2157f | 2015-03-13 16:08:06 -0400 | [diff] [blame] | 1020 | if (unlikely(!tipc_msg_validate(skb))) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1021 | goto discard; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1022 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1023 | /* Handle arrival of a non-unicast link message */ |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1024 | msg = buf_msg(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1025 | if (unlikely(msg_non_seq(msg))) { |
Allan Stephens | 1265a02 | 2008-06-04 17:32:35 -0700 | [diff] [blame] | 1026 | if (msg_user(msg) == LINK_CONFIG) |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 1027 | tipc_disc_rcv(net, skb, b_ptr); |
Allan Stephens | 1265a02 | 2008-06-04 17:32:35 -0700 | [diff] [blame] | 1028 | else |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 1029 | tipc_bclink_rcv(net, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1030 | continue; |
| 1031 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1032 | |
Allan Stephens | ed33a9c | 2011-04-05 15:15:04 -0400 | [diff] [blame] | 1033 | /* Discard unicast link messages destined for another node */ |
Allan Stephens | 2600824 | 2006-06-25 23:39:31 -0700 | [diff] [blame] | 1034 | if (unlikely(!msg_short(msg) && |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 1035 | (msg_destnode(msg) != tn->own_addr))) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1036 | goto discard; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1037 | |
Allan Stephens | 5a68d5e | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 1038 | /* Locate neighboring node that sent message */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1039 | n_ptr = tipc_node_find(net, msg_prevnode(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1040 | if (unlikely(!n_ptr)) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1041 | goto discard; |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1042 | |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 1043 | tipc_node_lock(n_ptr); |
Allan Stephens | 5a68d5e | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 1044 | /* Locate unicast link endpoint that should handle message */ |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 1045 | l_ptr = n_ptr->links[b_ptr->identity].link; |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1046 | if (unlikely(!l_ptr)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1047 | goto unlock; |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1048 | |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1049 | /* Verify that communication with node is currently allowed */ |
Ying Xue | aecb9bb | 2014-05-08 08:54:39 +0800 | [diff] [blame] | 1050 | if ((n_ptr->action_flags & TIPC_WAIT_PEER_LINKS_DOWN) && |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1051 | msg_user(msg) == LINK_PROTOCOL && |
| 1052 | (msg_type(msg) == RESET_MSG || |
| 1053 | msg_type(msg) == ACTIVATE_MSG) && |
| 1054 | !msg_redundant_link(msg)) |
Ying Xue | aecb9bb | 2014-05-08 08:54:39 +0800 | [diff] [blame] | 1055 | n_ptr->action_flags &= ~TIPC_WAIT_PEER_LINKS_DOWN; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1056 | |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1057 | if (tipc_node_blocked(n_ptr)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1058 | goto unlock; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1059 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1060 | /* Validate message sequence number info */ |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1061 | seq_no = msg_seqno(msg); |
| 1062 | ackd = msg_ack(msg); |
| 1063 | |
| 1064 | /* Release acked messages */ |
Jon Paul Maloy | 2cdf391 | 2015-03-13 16:08:09 -0400 | [diff] [blame] | 1065 | if (unlikely(n_ptr->bclink.acked != msg_bcast_ack(msg))) |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 1066 | tipc_bclink_acknowledge(n_ptr, msg_bcast_ack(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1067 | |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1068 | released = 0; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1069 | skb_queue_walk_safe(&l_ptr->transmq, skb1, tmp) { |
| 1070 | if (more(buf_seqno(skb1), ackd)) |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1071 | break; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1072 | __skb_unlink(skb1, &l_ptr->transmq); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1073 | kfree_skb(skb1); |
| 1074 | released = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1075 | } |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1076 | |
| 1077 | /* Try sending any messages link endpoint has pending */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1078 | if (unlikely(skb_queue_len(&l_ptr->backlogq))) |
Ying Xue | 47b4c9a | 2014-11-26 11:41:48 +0800 | [diff] [blame] | 1079 | tipc_link_push_packets(l_ptr); |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1080 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1081 | if (released && !skb_queue_empty(&l_ptr->wakeupq)) |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1082 | link_prepare_wakeup(l_ptr); |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1083 | |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1084 | /* Process the incoming packet */ |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1085 | if (unlikely(!link_working_working(l_ptr))) { |
| 1086 | if (msg_user(msg) == LINK_PROTOCOL) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1087 | tipc_link_proto_rcv(l_ptr, skb); |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1088 | link_retrieve_defq(l_ptr, &head); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1089 | skb = NULL; |
| 1090 | goto unlock; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1091 | } |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1092 | |
| 1093 | /* Traffic message. Conditionally activate link */ |
| 1094 | link_state_event(l_ptr, TRAFFIC_MSG_EVT); |
| 1095 | |
| 1096 | if (link_working_working(l_ptr)) { |
| 1097 | /* Re-insert buffer in front of queue */ |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1098 | __skb_queue_head(&head, skb); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1099 | skb = NULL; |
| 1100 | goto unlock; |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1101 | } |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1102 | goto unlock; |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1103 | } |
| 1104 | |
| 1105 | /* Link is now in state WORKING_WORKING */ |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1106 | if (unlikely(seq_no != l_ptr->rcv_nxt)) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1107 | link_handle_out_of_seq_msg(l_ptr, skb); |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1108 | link_retrieve_defq(l_ptr, &head); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1109 | skb = NULL; |
| 1110 | goto unlock; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1111 | } |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 1112 | l_ptr->silent_intv_cnt = 0; |
| 1113 | |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 1114 | /* Synchronize with parallel link if applicable */ |
| 1115 | if (unlikely((l_ptr->flags & LINK_SYNCHING) && !msg_dup(msg))) { |
Jon Paul Maloy | 0d699f28 | 2015-04-28 16:59:04 -0400 | [diff] [blame] | 1116 | if (!link_synch(l_ptr)) |
| 1117 | goto unlock; |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 1118 | } |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1119 | l_ptr->rcv_nxt++; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1120 | if (unlikely(!skb_queue_empty(&l_ptr->deferdq))) |
Ying Xue | f03273f | 2014-11-26 11:41:54 +0800 | [diff] [blame] | 1121 | link_retrieve_defq(l_ptr, &head); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1122 | if (unlikely(++l_ptr->rcv_unacked >= TIPC_MIN_LINK_WIN)) { |
Erik Hugne | 3f53bd8 | 2014-07-01 10:22:41 +0200 | [diff] [blame] | 1123 | l_ptr->stats.sent_acks++; |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1124 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0); |
Erik Hugne | 3f53bd8 | 2014-07-01 10:22:41 +0200 | [diff] [blame] | 1125 | } |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1126 | tipc_link_input(l_ptr, skb); |
| 1127 | skb = NULL; |
| 1128 | unlock: |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1129 | tipc_node_unlock(n_ptr); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 1130 | tipc_node_put(n_ptr); |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1131 | discard: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1132 | if (unlikely(skb)) |
| 1133 | kfree_skb(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1134 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1135 | } |
| 1136 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1137 | /* tipc_data_input - deliver data and name distr msgs to upper layer |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1138 | * |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1139 | * Consumes buffer if message is of right type |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1140 | * Node lock must be held |
| 1141 | */ |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1142 | 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] | 1143 | { |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1144 | struct tipc_node *node = link->owner; |
| 1145 | struct tipc_msg *msg = buf_msg(skb); |
| 1146 | u32 dport = msg_destport(msg); |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1147 | |
| 1148 | switch (msg_user(msg)) { |
| 1149 | case TIPC_LOW_IMPORTANCE: |
| 1150 | case TIPC_MEDIUM_IMPORTANCE: |
| 1151 | case TIPC_HIGH_IMPORTANCE: |
| 1152 | case TIPC_CRITICAL_IMPORTANCE: |
| 1153 | case CONN_MANAGER: |
Jon Paul Maloy | d39bbd4 | 2015-07-16 16:54:21 -0400 | [diff] [blame] | 1154 | if (tipc_skb_queue_tail(link->inputq, skb, dport)) { |
| 1155 | node->inputq = link->inputq; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1156 | node->action_flags |= TIPC_MSG_EVT; |
| 1157 | } |
| 1158 | return true; |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1159 | case NAME_DISTRIBUTOR: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1160 | node->bclink.recv_permitted = true; |
Jon Paul Maloy | d39bbd4 | 2015-07-16 16:54:21 -0400 | [diff] [blame] | 1161 | node->namedq = link->namedq; |
| 1162 | skb_queue_tail(link->namedq, skb); |
| 1163 | if (skb_queue_len(link->namedq) == 1) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1164 | node->action_flags |= TIPC_NAMED_MSG_EVT; |
| 1165 | return true; |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1166 | case MSG_BUNDLER: |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1167 | case TUNNEL_PROTOCOL: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1168 | case MSG_FRAGMENTER: |
| 1169 | case BCAST_PROTOCOL: |
| 1170 | return false; |
| 1171 | default: |
| 1172 | pr_warn("Dropping received illegal msg type\n"); |
| 1173 | kfree_skb(skb); |
| 1174 | return false; |
| 1175 | }; |
| 1176 | } |
| 1177 | |
| 1178 | /* tipc_link_input - process packet that has passed link protocol check |
| 1179 | * |
| 1180 | * Consumes buffer |
| 1181 | * Node lock must be held |
| 1182 | */ |
| 1183 | static void tipc_link_input(struct tipc_link *link, struct sk_buff *skb) |
| 1184 | { |
| 1185 | struct tipc_node *node = link->owner; |
| 1186 | struct tipc_msg *msg = buf_msg(skb); |
| 1187 | struct sk_buff *iskb; |
| 1188 | int pos = 0; |
| 1189 | |
| 1190 | if (likely(tipc_data_input(link, skb))) |
| 1191 | return; |
| 1192 | |
| 1193 | switch (msg_user(msg)) { |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1194 | case TUNNEL_PROTOCOL: |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 1195 | if (msg_dup(msg)) { |
| 1196 | link->flags |= LINK_SYNCHING; |
| 1197 | link->synch_point = msg_seqno(msg_get_wrapped(msg)); |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1198 | kfree_skb(skb); |
| 1199 | break; |
Jon Paul Maloy | 8b4ed86 | 2015-03-25 12:07:26 -0400 | [diff] [blame] | 1200 | } |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1201 | if (!tipc_link_failover_rcv(link, &skb)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1202 | break; |
| 1203 | if (msg_user(buf_msg(skb)) != MSG_BUNDLER) { |
| 1204 | tipc_data_input(link, skb); |
| 1205 | break; |
| 1206 | } |
| 1207 | case MSG_BUNDLER: |
| 1208 | link->stats.recv_bundles++; |
| 1209 | link->stats.recv_bundled += msg_msgcnt(msg); |
| 1210 | |
| 1211 | while (tipc_msg_extract(skb, &iskb, &pos)) |
| 1212 | tipc_data_input(link, iskb); |
| 1213 | break; |
| 1214 | case MSG_FRAGMENTER: |
| 1215 | link->stats.recv_fragments++; |
| 1216 | if (tipc_buf_append(&link->reasm_buf, &skb)) { |
| 1217 | link->stats.recv_fragmented++; |
| 1218 | tipc_data_input(link, skb); |
| 1219 | } else if (!link->reasm_buf) { |
| 1220 | tipc_link_reset(link); |
| 1221 | } |
| 1222 | break; |
| 1223 | case BCAST_PROTOCOL: |
| 1224 | tipc_link_sync_rcv(node, skb); |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1225 | break; |
| 1226 | default: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1227 | break; |
| 1228 | }; |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1229 | } |
| 1230 | |
| 1231 | /** |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1232 | * tipc_link_defer_pkt - Add out-of-sequence message to deferred reception queue |
| 1233 | * |
| 1234 | * Returns increase in queue length (i.e. 0 or 1) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1235 | */ |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1236 | 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] | 1237 | { |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1238 | struct sk_buff *skb1; |
Jon Paul Maloy | e4bf4f7 | 2015-05-14 10:46:14 -0400 | [diff] [blame] | 1239 | u16 seq_no = buf_seqno(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1240 | |
| 1241 | /* Empty queue ? */ |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1242 | if (skb_queue_empty(list)) { |
| 1243 | __skb_queue_tail(list, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1244 | return 1; |
| 1245 | } |
| 1246 | |
| 1247 | /* Last ? */ |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1248 | if (less(buf_seqno(skb_peek_tail(list)), seq_no)) { |
| 1249 | __skb_queue_tail(list, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1250 | return 1; |
| 1251 | } |
| 1252 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1253 | /* Locate insertion point in queue, then insert; discard if duplicate */ |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1254 | skb_queue_walk(list, skb1) { |
Jon Paul Maloy | e4bf4f7 | 2015-05-14 10:46:14 -0400 | [diff] [blame] | 1255 | u16 curr_seqno = buf_seqno(skb1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1256 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1257 | if (seq_no == curr_seqno) { |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1258 | kfree_skb(skb); |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1259 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1260 | } |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1261 | |
| 1262 | if (less(seq_no, curr_seqno)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1263 | break; |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1264 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1265 | |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1266 | __skb_queue_before(list, skb1, skb); |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1267 | return 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1268 | } |
| 1269 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1270 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1271 | * link_handle_out_of_seq_msg - handle arrival of out-of-sequence packet |
| 1272 | */ |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1273 | 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] | 1274 | struct sk_buff *buf) |
| 1275 | { |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1276 | u32 seq_no = buf_seqno(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1277 | |
| 1278 | if (likely(msg_user(buf_msg(buf)) == LINK_PROTOCOL)) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1279 | tipc_link_proto_rcv(l_ptr, buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1280 | return; |
| 1281 | } |
| 1282 | |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 1283 | /* Record OOS packet arrival */ |
| 1284 | l_ptr->silent_intv_cnt = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1285 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1286 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1287 | * Discard packet if a duplicate; otherwise add it to deferred queue |
| 1288 | * and notify peer of gap as per protocol specification |
| 1289 | */ |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1290 | if (less(seq_no, l_ptr->rcv_nxt)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1291 | l_ptr->stats.duplicates++; |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1292 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1293 | return; |
| 1294 | } |
| 1295 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1296 | if (tipc_link_defer_pkt(&l_ptr->deferdq, buf)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1297 | l_ptr->stats.deferred_recv++; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1298 | if ((skb_queue_len(&l_ptr->deferdq) % TIPC_MIN_LINK_WIN) == 1) |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1299 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0); |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1300 | } else { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1301 | l_ptr->stats.duplicates++; |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 1302 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1303 | } |
| 1304 | |
| 1305 | /* |
| 1306 | * Send protocol message to the other endpoint. |
| 1307 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1308 | void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg, |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1309 | u32 gap, u32 tolerance, u32 priority) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1310 | { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 1311 | struct sk_buff *buf = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1312 | struct tipc_msg *msg = l_ptr->pmsg; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1313 | u32 msg_size = sizeof(l_ptr->proto_msg); |
Allan Stephens | 75f0aa4 | 2011-02-28 15:30:20 -0500 | [diff] [blame] | 1314 | int r_flag; |
Jon Paul Maloy | e4bf4f7 | 2015-05-14 10:46:14 -0400 | [diff] [blame] | 1315 | u16 last_rcv; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1316 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1317 | /* Don't send protocol message during link failover */ |
| 1318 | if (l_ptr->flags & LINK_FAILINGOVER) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1319 | return; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1320 | |
| 1321 | /* Abort non-RESET send if communication with node is prohibited */ |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1322 | if ((tipc_node_blocked(l_ptr->owner)) && (msg_typ != RESET_MSG)) |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1323 | return; |
| 1324 | |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1325 | /* Create protocol message with "out-of-sequence" sequence number */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1326 | msg_set_type(msg, msg_typ); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1327 | msg_set_net_plane(msg, l_ptr->net_plane); |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1328 | msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1329 | 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] | 1330 | |
| 1331 | if (msg_typ == STATE_MSG) { |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1332 | u16 next_sent = l_ptr->snd_nxt; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1333 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1334 | if (!tipc_link_is_up(l_ptr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1335 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1336 | msg_set_next_sent(msg, next_sent); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1337 | if (!skb_queue_empty(&l_ptr->deferdq)) { |
Jon Paul Maloy | e4bf4f7 | 2015-05-14 10:46:14 -0400 | [diff] [blame] | 1338 | last_rcv = buf_seqno(skb_peek(&l_ptr->deferdq)); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1339 | gap = mod(last_rcv - l_ptr->rcv_nxt); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1340 | } |
| 1341 | msg_set_seq_gap(msg, gap); |
| 1342 | if (gap) |
| 1343 | l_ptr->stats.sent_nacks++; |
| 1344 | msg_set_link_tolerance(msg, tolerance); |
| 1345 | msg_set_linkprio(msg, priority); |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1346 | msg_set_max_pkt(msg, l_ptr->mtu); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1347 | msg_set_ack(msg, mod(l_ptr->rcv_nxt - 1)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1348 | msg_set_probe(msg, probe_msg != 0); |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1349 | if (probe_msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1350 | l_ptr->stats.sent_probes++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1351 | l_ptr->stats.sent_states++; |
| 1352 | } else { /* RESET_MSG or ACTIVATE_MSG */ |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1353 | msg_set_ack(msg, mod(l_ptr->failover_checkpt - 1)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1354 | msg_set_seq_gap(msg, 0); |
| 1355 | msg_set_next_sent(msg, 1); |
Allan Stephens | f23d9bf | 2011-01-18 15:15:34 -0500 | [diff] [blame] | 1356 | msg_set_probe(msg, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1357 | msg_set_link_tolerance(msg, l_ptr->tolerance); |
| 1358 | msg_set_linkprio(msg, l_ptr->priority); |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1359 | msg_set_max_pkt(msg, l_ptr->advertised_mtu); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1360 | } |
| 1361 | |
Allan Stephens | 75f0aa4 | 2011-02-28 15:30:20 -0500 | [diff] [blame] | 1362 | r_flag = (l_ptr->owner->working_links > tipc_link_is_up(l_ptr)); |
| 1363 | msg_set_redundant_link(msg, r_flag); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1364 | msg_set_linkprio(msg, l_ptr->priority); |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1365 | msg_set_size(msg, msg_size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1366 | |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1367 | msg_set_seqno(msg, mod(l_ptr->snd_nxt + (0xffff / 2))); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1368 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 1369 | buf = tipc_buf_acquire(msg_size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1370 | if (!buf) |
| 1371 | return; |
| 1372 | |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 1373 | skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg)); |
Ying Xue | 796c75d | 2013-06-17 10:54:48 -0400 | [diff] [blame] | 1374 | buf->priority = TC_PRIO_CONTROL; |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1375 | tipc_bearer_send(l_ptr->owner->net, l_ptr->bearer_id, buf, |
| 1376 | &l_ptr->media_addr); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1377 | l_ptr->rcv_unacked = 0; |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1378 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1379 | } |
| 1380 | |
| 1381 | /* |
| 1382 | * Receive protocol message : |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1383 | * Note that network plane id propagates through the network, and may |
| 1384 | * change at any time. The node with lowest address rules |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1385 | */ |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1386 | static void tipc_link_proto_rcv(struct tipc_link *l_ptr, |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 1387 | struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1388 | { |
| 1389 | u32 rec_gap = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1390 | u32 msg_tol; |
| 1391 | struct tipc_msg *msg = buf_msg(buf); |
| 1392 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1393 | if (l_ptr->flags & LINK_FAILINGOVER) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1394 | goto exit; |
| 1395 | |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1396 | if (l_ptr->net_plane != msg_net_plane(msg)) |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1397 | if (link_own_addr(l_ptr) > msg_prevnode(msg)) |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1398 | l_ptr->net_plane = msg_net_plane(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1399 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1400 | switch (msg_type(msg)) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1401 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1402 | case RESET_MSG: |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 1403 | if (!link_working_unknown(l_ptr) && |
| 1404 | (l_ptr->peer_session != INVALID_SESSION)) { |
Allan Stephens | 641c218 | 2011-04-07 09:54:43 -0400 | [diff] [blame] | 1405 | if (less_eq(msg_session(msg), l_ptr->peer_session)) |
| 1406 | break; /* duplicate or old reset: ignore */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1407 | } |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1408 | |
| 1409 | if (!msg_redundant_link(msg) && (link_working_working(l_ptr) || |
| 1410 | link_working_unknown(l_ptr))) { |
| 1411 | /* |
| 1412 | * peer has lost contact -- don't allow peer's links |
| 1413 | * to reactivate before we recognize loss & clean up |
| 1414 | */ |
Ying Xue | ca9cf06 | 2014-05-08 08:54:40 +0800 | [diff] [blame] | 1415 | l_ptr->owner->action_flags |= TIPC_WAIT_OWN_LINKS_DOWN; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1416 | } |
| 1417 | |
Allan Stephens | 47361c8 | 2011-10-26 10:55:16 -0400 | [diff] [blame] | 1418 | link_state_event(l_ptr, RESET_MSG); |
| 1419 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1420 | /* fall thru' */ |
| 1421 | case ACTIVATE_MSG: |
| 1422 | /* Update link settings according other endpoint's values */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1423 | strcpy((strrchr(l_ptr->name, ':') + 1), (char *)msg_data(msg)); |
| 1424 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1425 | msg_tol = msg_link_tolerance(msg); |
| 1426 | if (msg_tol > l_ptr->tolerance) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1427 | link_set_supervision_props(l_ptr, msg_tol); |
| 1428 | |
| 1429 | if (msg_linkprio(msg) > l_ptr->priority) |
| 1430 | l_ptr->priority = msg_linkprio(msg); |
| 1431 | |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1432 | if (l_ptr->mtu > msg_max_pkt(msg)) |
| 1433 | l_ptr->mtu = msg_max_pkt(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1434 | |
Allan Stephens | 4d75313 | 2011-10-25 12:19:05 -0400 | [diff] [blame] | 1435 | /* Synchronize broadcast link info, if not done previously */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1436 | if (!tipc_node_is_up(l_ptr->owner)) { |
| 1437 | l_ptr->owner->bclink.last_sent = |
| 1438 | l_ptr->owner->bclink.last_in = |
| 1439 | msg_last_bcast(msg); |
| 1440 | l_ptr->owner->bclink.oos_state = 0; |
| 1441 | } |
Allan Stephens | 4d75313 | 2011-10-25 12:19:05 -0400 | [diff] [blame] | 1442 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1443 | l_ptr->peer_session = msg_session(msg); |
| 1444 | l_ptr->peer_bearer_id = msg_bearer_id(msg); |
Allan Stephens | 47361c8 | 2011-10-26 10:55:16 -0400 | [diff] [blame] | 1445 | |
| 1446 | if (msg_type(msg) == ACTIVATE_MSG) |
| 1447 | link_state_event(l_ptr, ACTIVATE_MSG); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1448 | break; |
| 1449 | case STATE_MSG: |
| 1450 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1451 | msg_tol = msg_link_tolerance(msg); |
| 1452 | if (msg_tol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1453 | link_set_supervision_props(l_ptr, msg_tol); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1454 | |
| 1455 | if (msg_linkprio(msg) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1456 | (msg_linkprio(msg) != l_ptr->priority)) { |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 1457 | pr_debug("%s<%s>, priority change %u->%u\n", |
| 1458 | link_rst_msg, l_ptr->name, |
| 1459 | l_ptr->priority, msg_linkprio(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1460 | l_ptr->priority = msg_linkprio(msg); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1461 | tipc_link_reset(l_ptr); /* Enforce change to take effect */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1462 | break; |
| 1463 | } |
Jon Paul Maloy | ec37dcd | 2014-05-14 05:39:10 -0400 | [diff] [blame] | 1464 | |
| 1465 | /* Record reception; force mismatch at next timeout: */ |
Jon Paul Maloy | cd4eee3 | 2015-05-14 10:46:16 -0400 | [diff] [blame] | 1466 | l_ptr->silent_intv_cnt = 0; |
Jon Paul Maloy | ec37dcd | 2014-05-14 05:39:10 -0400 | [diff] [blame] | 1467 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1468 | link_state_event(l_ptr, TRAFFIC_MSG_EVT); |
| 1469 | l_ptr->stats.recv_states++; |
| 1470 | if (link_reset_unknown(l_ptr)) |
| 1471 | break; |
| 1472 | |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1473 | if (less_eq(l_ptr->rcv_nxt, msg_next_sent(msg))) |
| 1474 | rec_gap = mod(msg_next_sent(msg) - l_ptr->rcv_nxt); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1475 | |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1476 | if (msg_probe(msg)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1477 | l_ptr->stats.recv_probes++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1478 | |
| 1479 | /* Protocol message before retransmits, reduce loss risk */ |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 1480 | if (l_ptr->owner->bclink.recv_permitted) |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1481 | tipc_bclink_update_link_state(l_ptr->owner, |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1482 | msg_last_bcast(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1483 | |
| 1484 | if (rec_gap || (msg_probe(msg))) { |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1485 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, |
| 1486 | rec_gap, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1487 | } |
| 1488 | if (msg_seq_gap(msg)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1489 | l_ptr->stats.recv_nacks++; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1490 | tipc_link_retransmit(l_ptr, skb_peek(&l_ptr->transmq), |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1491 | msg_seq_gap(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1492 | } |
| 1493 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1494 | } |
| 1495 | exit: |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1496 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1497 | } |
| 1498 | |
| 1499 | |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1500 | /* tipc_link_tunnel_xmit(): Tunnel one packet via a link belonging to |
| 1501 | * a different bearer. Owner node is locked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1502 | */ |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1503 | static void tipc_link_tunnel_xmit(struct tipc_link *l_ptr, |
| 1504 | struct tipc_msg *tunnel_hdr, |
| 1505 | struct tipc_msg *msg, |
| 1506 | u32 selector) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1507 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1508 | struct tipc_link *tunnel; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1509 | struct sk_buff *skb; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1510 | u32 length = msg_size(msg); |
| 1511 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 1512 | tunnel = node_active_link(l_ptr->owner, selector & 1); |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1513 | if (!tipc_link_is_up(tunnel)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1514 | pr_warn("%stunnel link no longer available\n", link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1515 | return; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1516 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1517 | msg_set_size(tunnel_hdr, length + INT_H_SIZE); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1518 | skb = tipc_buf_acquire(length + INT_H_SIZE); |
| 1519 | if (!skb) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1520 | pr_warn("%sunable to send tunnel msg\n", link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1521 | return; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1522 | } |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1523 | skb_copy_to_linear_data(skb, tunnel_hdr, INT_H_SIZE); |
| 1524 | skb_copy_to_linear_data_offset(skb, INT_H_SIZE, msg, length); |
| 1525 | __tipc_link_xmit_skb(tunnel, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1526 | } |
| 1527 | |
| 1528 | |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1529 | /* tipc_link_failover_send_queue(): A link has gone down, but a second |
| 1530 | * link is still active. We can do failover. Tunnel the failing link's |
| 1531 | * whole send queue via the remaining link. This way, we don't lose |
| 1532 | * any packets, and sequence order is preserved for subsequent traffic |
| 1533 | * sent over the remaining link. Owner node is locked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1534 | */ |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1535 | void tipc_link_failover_send_queue(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1536 | { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1537 | int msgcount; |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 1538 | struct tipc_link *tunnel = node_active_link(l_ptr->owner, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1539 | struct tipc_msg tunnel_hdr; |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1540 | struct sk_buff *skb; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1541 | int split_bundles; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1542 | |
| 1543 | if (!tunnel) |
| 1544 | return; |
| 1545 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1546 | tipc_msg_init(link_own_addr(l_ptr), &tunnel_hdr, TUNNEL_PROTOCOL, |
| 1547 | FAILOVER_MSG, INT_H_SIZE, l_ptr->addr); |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 1548 | |
| 1549 | skb_queue_walk(&l_ptr->backlogq, skb) { |
| 1550 | msg_set_seqno(buf_msg(skb), l_ptr->snd_nxt); |
| 1551 | l_ptr->snd_nxt = mod(l_ptr->snd_nxt + 1); |
| 1552 | } |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1553 | skb_queue_splice_tail_init(&l_ptr->backlogq, &l_ptr->transmq); |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 1554 | tipc_link_purge_backlog(l_ptr); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1555 | msgcount = skb_queue_len(&l_ptr->transmq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1556 | msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id); |
| 1557 | msg_set_msgcnt(&tunnel_hdr, msgcount); |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 1558 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1559 | if (skb_queue_empty(&l_ptr->transmq)) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1560 | skb = tipc_buf_acquire(INT_H_SIZE); |
| 1561 | if (skb) { |
| 1562 | skb_copy_to_linear_data(skb, &tunnel_hdr, INT_H_SIZE); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1563 | msg_set_size(&tunnel_hdr, INT_H_SIZE); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1564 | __tipc_link_xmit_skb(tunnel, skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1565 | } else { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1566 | pr_warn("%sunable to send changeover msg\n", |
| 1567 | link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1568 | } |
| 1569 | return; |
| 1570 | } |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 1571 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 1572 | split_bundles = (node_active_link(l_ptr->owner, 0) != |
| 1573 | node_active_link(l_ptr->owner, 0)); |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1574 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1575 | skb_queue_walk(&l_ptr->transmq, skb) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1576 | struct tipc_msg *msg = buf_msg(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1577 | |
| 1578 | if ((msg_user(msg) == MSG_BUNDLER) && split_bundles) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1579 | struct tipc_msg *m = msg_get_wrapped(msg); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1580 | unchar *pos = (unchar *)m; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1581 | |
Florian Westphal | d788d80 | 2007-08-02 19:28:06 -0700 | [diff] [blame] | 1582 | msgcount = msg_msgcnt(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1583 | while (msgcount--) { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1584 | msg_set_seqno(m, msg_seqno(msg)); |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1585 | tipc_link_tunnel_xmit(l_ptr, &tunnel_hdr, m, |
| 1586 | msg_link_selector(m)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1587 | pos += align(msg_size(m)); |
| 1588 | m = (struct tipc_msg *)pos; |
| 1589 | } |
| 1590 | } else { |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1591 | tipc_link_tunnel_xmit(l_ptr, &tunnel_hdr, msg, |
| 1592 | msg_link_selector(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1593 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1594 | } |
| 1595 | } |
| 1596 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1597 | /* 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] | 1598 | * duplicate of the first link's send queue via the new link. This way, we |
| 1599 | * are guaranteed that currently queued packets from a socket are delivered |
| 1600 | * before future traffic from the same socket, even if this is using the |
| 1601 | * new link. The last arriving copy of each duplicate packet is dropped at |
| 1602 | * the receiving end by the regular protocol check, so packet cardinality |
| 1603 | * and sequence order is preserved per sender/receiver socket pair. |
| 1604 | * Owner node is locked. |
| 1605 | */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1606 | void tipc_link_dup_queue_xmit(struct tipc_link *link, |
| 1607 | struct tipc_link *tnl) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1608 | { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1609 | struct sk_buff *skb; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1610 | struct tipc_msg tnl_hdr; |
| 1611 | struct sk_buff_head *queue = &link->transmq; |
| 1612 | int mcnt; |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 1613 | u16 seqno; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1614 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1615 | tipc_msg_init(link_own_addr(link), &tnl_hdr, TUNNEL_PROTOCOL, |
| 1616 | SYNCH_MSG, INT_H_SIZE, link->addr); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1617 | mcnt = skb_queue_len(&link->transmq) + skb_queue_len(&link->backlogq); |
| 1618 | msg_set_msgcnt(&tnl_hdr, mcnt); |
| 1619 | msg_set_bearer_id(&tnl_hdr, link->peer_bearer_id); |
| 1620 | |
| 1621 | tunnel_queue: |
| 1622 | skb_queue_walk(queue, skb) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1623 | struct sk_buff *outskb; |
| 1624 | struct tipc_msg *msg = buf_msg(skb); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1625 | u32 len = msg_size(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1626 | |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1627 | msg_set_ack(msg, mod(link->rcv_nxt - 1)); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1628 | msg_set_bcast_ack(msg, link->owner->bclink.last_in); |
| 1629 | msg_set_size(&tnl_hdr, len + INT_H_SIZE); |
| 1630 | outskb = tipc_buf_acquire(len + INT_H_SIZE); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 1631 | if (outskb == NULL) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1632 | pr_warn("%sunable to send duplicate msg\n", |
| 1633 | link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1634 | return; |
| 1635 | } |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1636 | skb_copy_to_linear_data(outskb, &tnl_hdr, INT_H_SIZE); |
| 1637 | skb_copy_to_linear_data_offset(outskb, INT_H_SIZE, |
| 1638 | skb->data, len); |
| 1639 | __tipc_link_xmit_skb(tnl, outskb); |
| 1640 | if (!tipc_link_is_up(link)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1641 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1642 | } |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1643 | if (queue == &link->backlogq) |
| 1644 | return; |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 1645 | seqno = link->snd_nxt; |
| 1646 | skb_queue_walk(&link->backlogq, skb) { |
| 1647 | msg_set_seqno(buf_msg(skb), seqno); |
| 1648 | seqno = mod(seqno + 1); |
| 1649 | } |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1650 | queue = &link->backlogq; |
| 1651 | goto tunnel_queue; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1652 | } |
| 1653 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1654 | /* tipc_link_failover_rcv(): Receive a tunnelled FAILOVER_MSG packet |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1655 | * Owner node is locked. |
| 1656 | */ |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1657 | static bool tipc_link_failover_rcv(struct tipc_link *link, |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1658 | struct sk_buff **skb) |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1659 | { |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1660 | struct tipc_msg *msg = buf_msg(*skb); |
| 1661 | struct sk_buff *iskb = NULL; |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1662 | struct tipc_link *pl = NULL; |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1663 | int bearer_id = msg_bearer_id(msg); |
Jon Paul Maloy | c1336ee | 2015-03-13 16:08:08 -0400 | [diff] [blame] | 1664 | int pos = 0; |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1665 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1666 | if (msg_type(msg) != FAILOVER_MSG) { |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1667 | pr_warn("%sunknown tunnel pkt received\n", link_co_err); |
| 1668 | goto exit; |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1669 | } |
Dan Carpenter | cb4b102f | 2013-05-06 08:28:41 +0000 | [diff] [blame] | 1670 | if (bearer_id >= MAX_BEARERS) |
| 1671 | goto exit; |
Jon Paul Maloy | 1dab3d5 | 2014-02-13 17:29:10 -0500 | [diff] [blame] | 1672 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1673 | if (bearer_id == link->bearer_id) |
| 1674 | goto exit; |
| 1675 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 1676 | pl = link->owner->links[bearer_id].link; |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1677 | if (pl && tipc_link_is_up(pl)) |
| 1678 | tipc_link_reset(pl); |
| 1679 | |
| 1680 | if (link->failover_pkts == FIRST_FAILOVER) |
| 1681 | link->failover_pkts = msg_msgcnt(msg); |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1682 | |
| 1683 | /* Should we expect an inner packet? */ |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1684 | if (!link->failover_pkts) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1685 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1686 | |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1687 | if (!tipc_msg_extract(*skb, &iskb, &pos)) { |
| 1688 | pr_warn("%sno inner failover pkt\n", link_co_err); |
| 1689 | *skb = NULL; |
| 1690 | goto exit; |
| 1691 | } |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1692 | link->failover_pkts--; |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1693 | *skb = NULL; |
| 1694 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1695 | /* Was this packet already delivered? */ |
| 1696 | if (less(buf_seqno(iskb), link->failover_checkpt)) { |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1697 | kfree_skb(iskb); |
| 1698 | iskb = NULL; |
| 1699 | goto exit; |
| 1700 | } |
| 1701 | if (msg_user(buf_msg(iskb)) == MSG_FRAGMENTER) { |
| 1702 | link->stats.recv_fragments++; |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1703 | tipc_buf_append(&link->failover_skb, &iskb); |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1704 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1705 | exit: |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 1706 | if (!link->failover_pkts && pl) |
| 1707 | pl->flags &= ~LINK_FAILINGOVER; |
Jon Paul Maloy | 2da7142 | 2015-04-02 09:33:00 -0400 | [diff] [blame] | 1708 | kfree_skb(*skb); |
| 1709 | *skb = iskb; |
| 1710 | return *skb; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1711 | } |
| 1712 | |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 1713 | 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] | 1714 | { |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 1715 | unsigned long intv = ((tol / 4) > 500) ? 500 : tol / 4; |
| 1716 | |
| 1717 | if ((tol < TIPC_MIN_LINK_TOL) || (tol > TIPC_MAX_LINK_TOL)) |
Allan Stephens | 5413b4c | 2011-01-18 13:24:55 -0500 | [diff] [blame] | 1718 | return; |
| 1719 | |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 1720 | l_ptr->tolerance = tol; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1721 | l_ptr->keepalive_intv = msecs_to_jiffies(intv); |
| 1722 | l_ptr->abort_limit = tol / (jiffies_to_msecs(l_ptr->keepalive_intv)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1723 | } |
| 1724 | |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 1725 | void tipc_link_set_queue_limits(struct tipc_link *l, u32 win) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1726 | { |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1727 | int max_bulk = TIPC_MAX_PUBLICATIONS / (l->mtu / ITEM_SIZE); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1728 | |
Jon Paul Maloy | e3eea1e | 2015-03-13 16:08:11 -0400 | [diff] [blame] | 1729 | l->window = win; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 1730 | l->backlog[TIPC_LOW_IMPORTANCE].limit = win / 2; |
| 1731 | l->backlog[TIPC_MEDIUM_IMPORTANCE].limit = win; |
| 1732 | l->backlog[TIPC_HIGH_IMPORTANCE].limit = win / 2 * 3; |
| 1733 | l->backlog[TIPC_CRITICAL_IMPORTANCE].limit = win * 2; |
| 1734 | l->backlog[TIPC_SYSTEM_IMPORTANCE].limit = max_bulk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1735 | } |
| 1736 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1737 | /* 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] | 1738 | * @net: the applicable net namespace |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1739 | * @name: pointer to link name string |
| 1740 | * @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] | 1741 | * |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1742 | * 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] | 1743 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1744 | static struct tipc_node *tipc_link_find_owner(struct net *net, |
| 1745 | const char *link_name, |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1746 | unsigned int *bearer_id) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1747 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1748 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1749 | struct tipc_link *l_ptr; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1750 | struct tipc_node *n_ptr; |
Fabian Frederick | 886eaa1 | 2014-12-25 12:05:50 +0100 | [diff] [blame] | 1751 | struct tipc_node *found_node = NULL; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1752 | int i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1753 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1754 | *bearer_id = 0; |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 1755 | rcu_read_lock(); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1756 | list_for_each_entry_rcu(n_ptr, &tn->node_list, list) { |
Jon Paul Maloy | a11607f | 2014-02-14 16:40:44 -0500 | [diff] [blame] | 1757 | tipc_node_lock(n_ptr); |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1758 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 1759 | l_ptr = n_ptr->links[i].link; |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1760 | if (l_ptr && !strcmp(l_ptr->name, link_name)) { |
| 1761 | *bearer_id = i; |
| 1762 | found_node = n_ptr; |
| 1763 | break; |
| 1764 | } |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1765 | } |
Jon Paul Maloy | a11607f | 2014-02-14 16:40:44 -0500 | [diff] [blame] | 1766 | tipc_node_unlock(n_ptr); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1767 | if (found_node) |
| 1768 | break; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1769 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 1770 | rcu_read_unlock(); |
| 1771 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1772 | return found_node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1773 | } |
| 1774 | |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 1775 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1776 | * link_reset_statistics - reset link statistics |
| 1777 | * @l_ptr: pointer to link |
| 1778 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1779 | static void link_reset_statistics(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1780 | { |
| 1781 | memset(&l_ptr->stats, 0, sizeof(l_ptr->stats)); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1782 | l_ptr->stats.sent_info = l_ptr->snd_nxt; |
| 1783 | l_ptr->stats.recv_info = l_ptr->rcv_nxt; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1784 | } |
| 1785 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1786 | static void link_print(struct tipc_link *l_ptr, const char *str) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1787 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1788 | 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] | 1789 | struct tipc_bearer *b_ptr; |
| 1790 | |
| 1791 | rcu_read_lock(); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1792 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[l_ptr->bearer_id]); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1793 | if (b_ptr) |
| 1794 | pr_info("%s Link %x<%s>:", str, l_ptr->addr, b_ptr->name); |
| 1795 | rcu_read_unlock(); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 1796 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1797 | if (link_working_unknown(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 1798 | pr_cont(":WU\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 1799 | else if (link_reset_reset(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 1800 | pr_cont(":RR\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 1801 | else if (link_reset_unknown(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 1802 | pr_cont(":RU\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 1803 | else if (link_working_working(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 1804 | pr_cont(":WW\n"); |
| 1805 | else |
| 1806 | pr_cont("\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1807 | } |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 1808 | |
| 1809 | /* Parse and validate nested (link) properties valid for media, bearer and link |
| 1810 | */ |
| 1811 | int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]) |
| 1812 | { |
| 1813 | int err; |
| 1814 | |
| 1815 | err = nla_parse_nested(props, TIPC_NLA_PROP_MAX, prop, |
| 1816 | tipc_nl_prop_policy); |
| 1817 | if (err) |
| 1818 | return err; |
| 1819 | |
| 1820 | if (props[TIPC_NLA_PROP_PRIO]) { |
| 1821 | u32 prio; |
| 1822 | |
| 1823 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); |
| 1824 | if (prio > TIPC_MAX_LINK_PRI) |
| 1825 | return -EINVAL; |
| 1826 | } |
| 1827 | |
| 1828 | if (props[TIPC_NLA_PROP_TOL]) { |
| 1829 | u32 tol; |
| 1830 | |
| 1831 | tol = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
| 1832 | if ((tol < TIPC_MIN_LINK_TOL) || (tol > TIPC_MAX_LINK_TOL)) |
| 1833 | return -EINVAL; |
| 1834 | } |
| 1835 | |
| 1836 | if (props[TIPC_NLA_PROP_WIN]) { |
| 1837 | u32 win; |
| 1838 | |
| 1839 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
| 1840 | if ((win < TIPC_MIN_LINK_WIN) || (win > TIPC_MAX_LINK_WIN)) |
| 1841 | return -EINVAL; |
| 1842 | } |
| 1843 | |
| 1844 | return 0; |
| 1845 | } |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 1846 | |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1847 | int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info) |
| 1848 | { |
| 1849 | int err; |
| 1850 | int res = 0; |
| 1851 | int bearer_id; |
| 1852 | char *name; |
| 1853 | struct tipc_link *link; |
| 1854 | struct tipc_node *node; |
| 1855 | struct nlattr *attrs[TIPC_NLA_LINK_MAX + 1]; |
Richard Alpe | 37e2d48 | 2015-02-09 09:50:08 +0100 | [diff] [blame] | 1856 | struct net *net = sock_net(skb->sk); |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1857 | |
| 1858 | if (!info->attrs[TIPC_NLA_LINK]) |
| 1859 | return -EINVAL; |
| 1860 | |
| 1861 | err = nla_parse_nested(attrs, TIPC_NLA_LINK_MAX, |
| 1862 | info->attrs[TIPC_NLA_LINK], |
| 1863 | tipc_nl_link_policy); |
| 1864 | if (err) |
| 1865 | return err; |
| 1866 | |
| 1867 | if (!attrs[TIPC_NLA_LINK_NAME]) |
| 1868 | return -EINVAL; |
| 1869 | |
| 1870 | name = nla_data(attrs[TIPC_NLA_LINK_NAME]); |
| 1871 | |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 1872 | if (strcmp(name, tipc_bclink_name) == 0) |
| 1873 | return tipc_nl_bc_link_set(net, attrs); |
| 1874 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1875 | node = tipc_link_find_owner(net, name, &bearer_id); |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1876 | if (!node) |
| 1877 | return -EINVAL; |
| 1878 | |
| 1879 | tipc_node_lock(node); |
| 1880 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 1881 | link = node->links[bearer_id].link; |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1882 | if (!link) { |
| 1883 | res = -EINVAL; |
| 1884 | goto out; |
| 1885 | } |
| 1886 | |
| 1887 | if (attrs[TIPC_NLA_LINK_PROP]) { |
| 1888 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; |
| 1889 | |
| 1890 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], |
| 1891 | props); |
| 1892 | if (err) { |
| 1893 | res = err; |
| 1894 | goto out; |
| 1895 | } |
| 1896 | |
| 1897 | if (props[TIPC_NLA_PROP_TOL]) { |
| 1898 | u32 tol; |
| 1899 | |
| 1900 | tol = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
| 1901 | link_set_supervision_props(link, tol); |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1902 | tipc_link_proto_xmit(link, STATE_MSG, 0, 0, tol, 0); |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1903 | } |
| 1904 | if (props[TIPC_NLA_PROP_PRIO]) { |
| 1905 | u32 prio; |
| 1906 | |
| 1907 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); |
| 1908 | link->priority = prio; |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1909 | tipc_link_proto_xmit(link, STATE_MSG, 0, 0, 0, prio); |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 1910 | } |
| 1911 | if (props[TIPC_NLA_PROP_WIN]) { |
| 1912 | u32 win; |
| 1913 | |
| 1914 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
| 1915 | tipc_link_set_queue_limits(link, win); |
| 1916 | } |
| 1917 | } |
| 1918 | |
| 1919 | out: |
| 1920 | tipc_node_unlock(node); |
| 1921 | |
| 1922 | return res; |
| 1923 | } |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 1924 | |
| 1925 | 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] | 1926 | { |
| 1927 | int i; |
| 1928 | struct nlattr *stats; |
| 1929 | |
| 1930 | struct nla_map { |
| 1931 | u32 key; |
| 1932 | u32 val; |
| 1933 | }; |
| 1934 | |
| 1935 | struct nla_map map[] = { |
| 1936 | {TIPC_NLA_STATS_RX_INFO, s->recv_info}, |
| 1937 | {TIPC_NLA_STATS_RX_FRAGMENTS, s->recv_fragments}, |
| 1938 | {TIPC_NLA_STATS_RX_FRAGMENTED, s->recv_fragmented}, |
| 1939 | {TIPC_NLA_STATS_RX_BUNDLES, s->recv_bundles}, |
| 1940 | {TIPC_NLA_STATS_RX_BUNDLED, s->recv_bundled}, |
| 1941 | {TIPC_NLA_STATS_TX_INFO, s->sent_info}, |
| 1942 | {TIPC_NLA_STATS_TX_FRAGMENTS, s->sent_fragments}, |
| 1943 | {TIPC_NLA_STATS_TX_FRAGMENTED, s->sent_fragmented}, |
| 1944 | {TIPC_NLA_STATS_TX_BUNDLES, s->sent_bundles}, |
| 1945 | {TIPC_NLA_STATS_TX_BUNDLED, s->sent_bundled}, |
| 1946 | {TIPC_NLA_STATS_MSG_PROF_TOT, (s->msg_length_counts) ? |
| 1947 | s->msg_length_counts : 1}, |
| 1948 | {TIPC_NLA_STATS_MSG_LEN_CNT, s->msg_length_counts}, |
| 1949 | {TIPC_NLA_STATS_MSG_LEN_TOT, s->msg_lengths_total}, |
| 1950 | {TIPC_NLA_STATS_MSG_LEN_P0, s->msg_length_profile[0]}, |
| 1951 | {TIPC_NLA_STATS_MSG_LEN_P1, s->msg_length_profile[1]}, |
| 1952 | {TIPC_NLA_STATS_MSG_LEN_P2, s->msg_length_profile[2]}, |
| 1953 | {TIPC_NLA_STATS_MSG_LEN_P3, s->msg_length_profile[3]}, |
| 1954 | {TIPC_NLA_STATS_MSG_LEN_P4, s->msg_length_profile[4]}, |
| 1955 | {TIPC_NLA_STATS_MSG_LEN_P5, s->msg_length_profile[5]}, |
| 1956 | {TIPC_NLA_STATS_MSG_LEN_P6, s->msg_length_profile[6]}, |
| 1957 | {TIPC_NLA_STATS_RX_STATES, s->recv_states}, |
| 1958 | {TIPC_NLA_STATS_RX_PROBES, s->recv_probes}, |
| 1959 | {TIPC_NLA_STATS_RX_NACKS, s->recv_nacks}, |
| 1960 | {TIPC_NLA_STATS_RX_DEFERRED, s->deferred_recv}, |
| 1961 | {TIPC_NLA_STATS_TX_STATES, s->sent_states}, |
| 1962 | {TIPC_NLA_STATS_TX_PROBES, s->sent_probes}, |
| 1963 | {TIPC_NLA_STATS_TX_NACKS, s->sent_nacks}, |
| 1964 | {TIPC_NLA_STATS_TX_ACKS, s->sent_acks}, |
| 1965 | {TIPC_NLA_STATS_RETRANSMITTED, s->retransmitted}, |
| 1966 | {TIPC_NLA_STATS_DUPLICATES, s->duplicates}, |
| 1967 | {TIPC_NLA_STATS_LINK_CONGS, s->link_congs}, |
| 1968 | {TIPC_NLA_STATS_MAX_QUEUE, s->max_queue_sz}, |
| 1969 | {TIPC_NLA_STATS_AVG_QUEUE, s->queue_sz_counts ? |
| 1970 | (s->accu_queue_sz / s->queue_sz_counts) : 0} |
| 1971 | }; |
| 1972 | |
| 1973 | stats = nla_nest_start(skb, TIPC_NLA_LINK_STATS); |
| 1974 | if (!stats) |
| 1975 | return -EMSGSIZE; |
| 1976 | |
| 1977 | for (i = 0; i < ARRAY_SIZE(map); i++) |
| 1978 | if (nla_put_u32(skb, map[i].key, map[i].val)) |
| 1979 | goto msg_full; |
| 1980 | |
| 1981 | nla_nest_end(skb, stats); |
| 1982 | |
| 1983 | return 0; |
| 1984 | msg_full: |
| 1985 | nla_nest_cancel(skb, stats); |
| 1986 | |
| 1987 | return -EMSGSIZE; |
| 1988 | } |
| 1989 | |
| 1990 | /* Caller should hold appropriate locks to protect the link */ |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 1991 | static int __tipc_nl_add_link(struct net *net, struct tipc_nl_msg *msg, |
Nicolas Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 1992 | struct tipc_link *link, int nlflags) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 1993 | { |
| 1994 | int err; |
| 1995 | void *hdr; |
| 1996 | struct nlattr *attrs; |
| 1997 | struct nlattr *prop; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 1998 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 1999 | |
Richard Alpe | bfb3e5d | 2015-02-09 09:50:03 +0100 | [diff] [blame] | 2000 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
Nicolas Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 2001 | nlflags, TIPC_NL_LINK_GET); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2002 | if (!hdr) |
| 2003 | return -EMSGSIZE; |
| 2004 | |
| 2005 | attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK); |
| 2006 | if (!attrs) |
| 2007 | goto msg_full; |
| 2008 | |
| 2009 | if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, link->name)) |
| 2010 | goto attr_msg_full; |
| 2011 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_DEST, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2012 | tipc_cluster_mask(tn->own_addr))) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2013 | goto attr_msg_full; |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 2014 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_MTU, link->mtu)) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2015 | goto attr_msg_full; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 2016 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, link->rcv_nxt)) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2017 | goto attr_msg_full; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 2018 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, link->snd_nxt)) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2019 | goto attr_msg_full; |
| 2020 | |
| 2021 | if (tipc_link_is_up(link)) |
| 2022 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP)) |
| 2023 | goto attr_msg_full; |
| 2024 | if (tipc_link_is_active(link)) |
| 2025 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_ACTIVE)) |
| 2026 | goto attr_msg_full; |
| 2027 | |
| 2028 | prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP); |
| 2029 | if (!prop) |
| 2030 | goto attr_msg_full; |
| 2031 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, link->priority)) |
| 2032 | goto prop_msg_full; |
| 2033 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, link->tolerance)) |
| 2034 | goto prop_msg_full; |
| 2035 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 2036 | link->window)) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2037 | goto prop_msg_full; |
| 2038 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, link->priority)) |
| 2039 | goto prop_msg_full; |
| 2040 | nla_nest_end(msg->skb, prop); |
| 2041 | |
| 2042 | err = __tipc_nl_add_stats(msg->skb, &link->stats); |
| 2043 | if (err) |
| 2044 | goto attr_msg_full; |
| 2045 | |
| 2046 | nla_nest_end(msg->skb, attrs); |
| 2047 | genlmsg_end(msg->skb, hdr); |
| 2048 | |
| 2049 | return 0; |
| 2050 | |
| 2051 | prop_msg_full: |
| 2052 | nla_nest_cancel(msg->skb, prop); |
| 2053 | attr_msg_full: |
| 2054 | nla_nest_cancel(msg->skb, attrs); |
| 2055 | msg_full: |
| 2056 | genlmsg_cancel(msg->skb, hdr); |
| 2057 | |
| 2058 | return -EMSGSIZE; |
| 2059 | } |
| 2060 | |
| 2061 | /* Caller should hold node lock */ |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2062 | static int __tipc_nl_add_node_links(struct net *net, struct tipc_nl_msg *msg, |
| 2063 | struct tipc_node *node, u32 *prev_link) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2064 | { |
| 2065 | u32 i; |
| 2066 | int err; |
| 2067 | |
| 2068 | for (i = *prev_link; i < MAX_BEARERS; i++) { |
| 2069 | *prev_link = i; |
| 2070 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 2071 | if (!node->links[i].link) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2072 | continue; |
| 2073 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 2074 | err = __tipc_nl_add_link(net, msg, |
| 2075 | node->links[i].link, NLM_F_MULTI); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2076 | if (err) |
| 2077 | return err; |
| 2078 | } |
| 2079 | *prev_link = 0; |
| 2080 | |
| 2081 | return 0; |
| 2082 | } |
| 2083 | |
| 2084 | int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2085 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2086 | struct net *net = sock_net(skb->sk); |
| 2087 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2088 | struct tipc_node *node; |
| 2089 | struct tipc_nl_msg msg; |
| 2090 | u32 prev_node = cb->args[0]; |
| 2091 | u32 prev_link = cb->args[1]; |
| 2092 | int done = cb->args[2]; |
| 2093 | int err; |
| 2094 | |
| 2095 | if (done) |
| 2096 | return 0; |
| 2097 | |
| 2098 | msg.skb = skb; |
| 2099 | msg.portid = NETLINK_CB(cb->skb).portid; |
| 2100 | msg.seq = cb->nlh->nlmsg_seq; |
| 2101 | |
| 2102 | rcu_read_lock(); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2103 | if (prev_node) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2104 | node = tipc_node_find(net, prev_node); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2105 | if (!node) { |
| 2106 | /* We never set seq or call nl_dump_check_consistent() |
| 2107 | * this means that setting prev_seq here will cause the |
| 2108 | * consistence check to fail in the netlink callback |
| 2109 | * handler. Resulting in the last NLMSG_DONE message |
| 2110 | * having the NLM_F_DUMP_INTR flag set. |
| 2111 | */ |
| 2112 | cb->prev_seq = 1; |
| 2113 | goto out; |
| 2114 | } |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 2115 | tipc_node_put(node); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2116 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2117 | list_for_each_entry_continue_rcu(node, &tn->node_list, |
| 2118 | list) { |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2119 | tipc_node_lock(node); |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2120 | err = __tipc_nl_add_node_links(net, &msg, node, |
| 2121 | &prev_link); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2122 | tipc_node_unlock(node); |
| 2123 | if (err) |
| 2124 | goto out; |
| 2125 | |
| 2126 | prev_node = node->addr; |
| 2127 | } |
| 2128 | } else { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 2129 | err = tipc_nl_add_bc_link(net, &msg); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2130 | if (err) |
| 2131 | goto out; |
| 2132 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2133 | list_for_each_entry_rcu(node, &tn->node_list, list) { |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2134 | tipc_node_lock(node); |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2135 | err = __tipc_nl_add_node_links(net, &msg, node, |
| 2136 | &prev_link); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2137 | tipc_node_unlock(node); |
| 2138 | if (err) |
| 2139 | goto out; |
| 2140 | |
| 2141 | prev_node = node->addr; |
| 2142 | } |
| 2143 | } |
| 2144 | done = 1; |
| 2145 | out: |
| 2146 | rcu_read_unlock(); |
| 2147 | |
| 2148 | cb->args[0] = prev_node; |
| 2149 | cb->args[1] = prev_link; |
| 2150 | cb->args[2] = done; |
| 2151 | |
| 2152 | return skb->len; |
| 2153 | } |
| 2154 | |
| 2155 | int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info) |
| 2156 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2157 | struct net *net = genl_info_net(info); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2158 | struct tipc_nl_msg msg; |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2159 | char *name; |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2160 | int err; |
| 2161 | |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2162 | msg.portid = info->snd_portid; |
| 2163 | msg.seq = info->snd_seq; |
| 2164 | |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 2165 | if (!info->attrs[TIPC_NLA_LINK_NAME]) |
| 2166 | return -EINVAL; |
| 2167 | name = nla_data(info->attrs[TIPC_NLA_LINK_NAME]); |
| 2168 | |
| 2169 | msg.skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 2170 | if (!msg.skb) |
| 2171 | return -ENOMEM; |
| 2172 | |
| 2173 | if (strcmp(name, tipc_bclink_name) == 0) { |
| 2174 | err = tipc_nl_add_bc_link(net, &msg); |
| 2175 | if (err) { |
| 2176 | nlmsg_free(msg.skb); |
| 2177 | return err; |
| 2178 | } |
| 2179 | } else { |
| 2180 | int bearer_id; |
| 2181 | struct tipc_node *node; |
| 2182 | struct tipc_link *link; |
| 2183 | |
| 2184 | node = tipc_link_find_owner(net, name, &bearer_id); |
| 2185 | if (!node) |
| 2186 | return -EINVAL; |
| 2187 | |
| 2188 | tipc_node_lock(node); |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 2189 | link = node->links[bearer_id].link; |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 2190 | if (!link) { |
| 2191 | tipc_node_unlock(node); |
| 2192 | nlmsg_free(msg.skb); |
| 2193 | return -EINVAL; |
| 2194 | } |
| 2195 | |
| 2196 | err = __tipc_nl_add_link(net, &msg, link, 0); |
| 2197 | tipc_node_unlock(node); |
| 2198 | if (err) { |
| 2199 | nlmsg_free(msg.skb); |
| 2200 | return err; |
| 2201 | } |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2202 | } |
| 2203 | |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 2204 | return genlmsg_reply(msg.skb, info); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 2205 | } |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2206 | |
| 2207 | int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info) |
| 2208 | { |
| 2209 | int err; |
| 2210 | char *link_name; |
| 2211 | unsigned int bearer_id; |
| 2212 | struct tipc_link *link; |
| 2213 | struct tipc_node *node; |
| 2214 | struct nlattr *attrs[TIPC_NLA_LINK_MAX + 1]; |
Richard Alpe | 1817877 | 2015-02-09 09:50:09 +0100 | [diff] [blame] | 2215 | struct net *net = sock_net(skb->sk); |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2216 | |
| 2217 | if (!info->attrs[TIPC_NLA_LINK]) |
| 2218 | return -EINVAL; |
| 2219 | |
| 2220 | err = nla_parse_nested(attrs, TIPC_NLA_LINK_MAX, |
| 2221 | info->attrs[TIPC_NLA_LINK], |
| 2222 | tipc_nl_link_policy); |
| 2223 | if (err) |
| 2224 | return err; |
| 2225 | |
| 2226 | if (!attrs[TIPC_NLA_LINK_NAME]) |
| 2227 | return -EINVAL; |
| 2228 | |
| 2229 | link_name = nla_data(attrs[TIPC_NLA_LINK_NAME]); |
| 2230 | |
| 2231 | if (strcmp(link_name, tipc_bclink_name) == 0) { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 2232 | err = tipc_bclink_reset_stats(net); |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2233 | if (err) |
| 2234 | return err; |
| 2235 | return 0; |
| 2236 | } |
| 2237 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2238 | node = tipc_link_find_owner(net, link_name, &bearer_id); |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2239 | if (!node) |
| 2240 | return -EINVAL; |
| 2241 | |
| 2242 | tipc_node_lock(node); |
| 2243 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 2244 | link = node->links[bearer_id].link; |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 2245 | if (!link) { |
| 2246 | tipc_node_unlock(node); |
| 2247 | return -EINVAL; |
| 2248 | } |
| 2249 | |
| 2250 | link_reset_statistics(link); |
| 2251 | |
| 2252 | tipc_node_unlock(node); |
| 2253 | |
| 2254 | return 0; |
| 2255 | } |