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 | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 4 | * Copyright (c) 1996-2007, 2012-2014, 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" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 38 | #include "link.h" |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 39 | #include "socket.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 40 | #include "name_distr.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 41 | #include "discover.h" |
| 42 | #include "config.h" |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame^] | 43 | #include "netlink.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 44 | |
Ying Xue | 796c75d | 2013-06-17 10:54:48 -0400 | [diff] [blame] | 45 | #include <linux/pkt_sched.h> |
| 46 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 47 | /* |
| 48 | * Error message prefixes |
| 49 | */ |
| 50 | static const char *link_co_err = "Link changeover error, "; |
| 51 | static const char *link_rst_msg = "Resetting link "; |
| 52 | static const char *link_unk_evt = "Unknown link event "; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 53 | |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame^] | 54 | /* Properties valid for media, bearar and link */ |
| 55 | static const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = { |
| 56 | [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC }, |
| 57 | [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 }, |
| 58 | [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 }, |
| 59 | [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 } |
| 60 | }; |
| 61 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 62 | /* |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 63 | * Out-of-range value for link session numbers |
| 64 | */ |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 65 | #define INVALID_SESSION 0x10000 |
| 66 | |
| 67 | /* |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 68 | * Link state events: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 69 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 70 | #define STARTING_EVT 856384768 /* link processing trigger */ |
| 71 | #define TRAFFIC_MSG_EVT 560815u /* rx'd ??? */ |
| 72 | #define TIMEOUT_EVT 560817u /* link timer expired */ |
| 73 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 74 | /* |
| 75 | * The following two 'message types' is really just implementation |
| 76 | * data conveniently stored in the message header. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 77 | * They must not be considered part of the protocol |
| 78 | */ |
| 79 | #define OPEN_MSG 0 |
| 80 | #define CLOSED_MSG 1 |
| 81 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 82 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 83 | * State value stored in 'exp_msg_count' |
| 84 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 85 | #define START_CHANGEOVER 100000u |
| 86 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 87 | 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] | 88 | struct sk_buff *buf); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 89 | static void tipc_link_proto_rcv(struct tipc_link *l_ptr, struct sk_buff *buf); |
Jon Paul Maloy | 3bb5338 | 2014-02-13 17:29:12 -0500 | [diff] [blame] | 90 | static int tipc_link_tunnel_rcv(struct tipc_node *n_ptr, |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 91 | struct sk_buff **buf); |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 92 | static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tolerance); |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 93 | static void link_state_event(struct tipc_link *l_ptr, u32 event); |
| 94 | static void link_reset_statistics(struct tipc_link *l_ptr); |
| 95 | static void link_print(struct tipc_link *l_ptr, const char *str); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 96 | static void tipc_link_sync_xmit(struct tipc_link *l); |
| 97 | static void tipc_link_sync_rcv(struct tipc_node *n, struct sk_buff *buf); |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 98 | static int tipc_link_input(struct tipc_link *l, struct sk_buff *buf); |
| 99 | static int tipc_link_prepare_input(struct tipc_link *l, struct sk_buff **buf); |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 100 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 101 | /* |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 102 | * Simple link routines |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 103 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 104 | static unsigned int align(unsigned int i) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 105 | { |
| 106 | return (i + 3) & ~3u; |
| 107 | } |
| 108 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 109 | static void link_init_max_pkt(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 110 | { |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 111 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 112 | u32 max_pkt; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 113 | |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 114 | rcu_read_lock(); |
| 115 | b_ptr = rcu_dereference_rtnl(bearer_list[l_ptr->bearer_id]); |
| 116 | if (!b_ptr) { |
| 117 | rcu_read_unlock(); |
| 118 | return; |
| 119 | } |
| 120 | max_pkt = (b_ptr->mtu & ~3); |
| 121 | rcu_read_unlock(); |
| 122 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 123 | if (max_pkt > MAX_MSG_SIZE) |
| 124 | max_pkt = MAX_MSG_SIZE; |
| 125 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 126 | l_ptr->max_pkt_target = max_pkt; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 127 | if (l_ptr->max_pkt_target < MAX_PKT_DEFAULT) |
| 128 | l_ptr->max_pkt = l_ptr->max_pkt_target; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 129 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 130 | l_ptr->max_pkt = MAX_PKT_DEFAULT; |
| 131 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 132 | l_ptr->max_pkt_probes = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 133 | } |
| 134 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 135 | static u32 link_next_sent(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 136 | { |
| 137 | if (l_ptr->next_out) |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 138 | return buf_seqno(l_ptr->next_out); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 139 | return mod(l_ptr->next_out_no); |
| 140 | } |
| 141 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 142 | static u32 link_last_sent(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 143 | { |
| 144 | return mod(link_next_sent(l_ptr) - 1); |
| 145 | } |
| 146 | |
| 147 | /* |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 148 | * Simple non-static link routines (i.e. referenced outside this file) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 149 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 150 | int tipc_link_is_up(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 151 | { |
| 152 | if (!l_ptr) |
| 153 | return 0; |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 154 | return link_working_working(l_ptr) || link_working_unknown(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 155 | } |
| 156 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 157 | int tipc_link_is_active(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 158 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 159 | return (l_ptr->owner->active_links[0] == l_ptr) || |
| 160 | (l_ptr->owner->active_links[1] == l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 164 | * link_timeout - handle expiration of link timer |
| 165 | * @l_ptr: pointer to link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 166 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 167 | static void link_timeout(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 168 | { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 169 | tipc_node_lock(l_ptr->owner); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 170 | |
| 171 | /* update counters used in statistical profiling of send traffic */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 172 | l_ptr->stats.accu_queue_sz += l_ptr->out_queue_size; |
| 173 | l_ptr->stats.queue_sz_counts++; |
| 174 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 175 | if (l_ptr->first_out) { |
| 176 | struct tipc_msg *msg = buf_msg(l_ptr->first_out); |
| 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 */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | |
| 205 | link_state_event(l_ptr, TIMEOUT_EVT); |
| 206 | |
| 207 | if (l_ptr->next_out) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 208 | tipc_link_push_queue(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 209 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 210 | tipc_node_unlock(l_ptr->owner); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 211 | } |
| 212 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 213 | static void link_set_timer(struct tipc_link *l_ptr, u32 time) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 214 | { |
| 215 | k_start_timer(&l_ptr->timer, time); |
| 216 | } |
| 217 | |
| 218 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 219 | * tipc_link_create - create a new link |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 220 | * @n_ptr: pointer to associated node |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 221 | * @b_ptr: pointer to associated bearer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 222 | * @media_addr: media address to use when sending messages over link |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 223 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 224 | * Returns pointer to link. |
| 225 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 226 | struct tipc_link *tipc_link_create(struct tipc_node *n_ptr, |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 227 | struct tipc_bearer *b_ptr, |
| 228 | const struct tipc_media_addr *media_addr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 229 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 230 | struct tipc_link *l_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 231 | struct tipc_msg *msg; |
| 232 | char *if_name; |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 233 | char addr_string[16]; |
| 234 | u32 peer = n_ptr->addr; |
| 235 | |
Holger Brunck | 0372bf5 | 2014-11-14 18:33:19 +0100 | [diff] [blame] | 236 | if (n_ptr->link_cnt >= MAX_BEARERS) { |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 237 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Holger Brunck | 0372bf5 | 2014-11-14 18:33:19 +0100 | [diff] [blame] | 238 | pr_err("Attempt to establish %uth link to %s. Max %u allowed.\n", |
| 239 | n_ptr->link_cnt, addr_string, MAX_BEARERS); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 240 | return NULL; |
| 241 | } |
| 242 | |
| 243 | if (n_ptr->links[b_ptr->identity]) { |
| 244 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 245 | pr_err("Attempt to establish second link on <%s> to %s\n", |
| 246 | b_ptr->name, addr_string); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 247 | return NULL; |
| 248 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 249 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 250 | l_ptr = kzalloc(sizeof(*l_ptr), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 251 | if (!l_ptr) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 252 | pr_warn("Link creation failed, no memory\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 253 | return NULL; |
| 254 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 255 | |
| 256 | l_ptr->addr = peer; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 257 | if_name = strchr(b_ptr->name, ':') + 1; |
Allan Stephens | 062b4c9 | 2011-04-07 09:28:47 -0400 | [diff] [blame] | 258 | sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:unknown", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 259 | tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr), |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 260 | tipc_node(tipc_own_addr), |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 261 | if_name, |
| 262 | tipc_zone(peer), tipc_cluster(peer), tipc_node(peer)); |
Allan Stephens | 062b4c9 | 2011-04-07 09:28:47 -0400 | [diff] [blame] | 263 | /* note: peer i/f name is updated by reset/activate message */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 264 | memcpy(&l_ptr->media_addr, media_addr, sizeof(*media_addr)); |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 265 | l_ptr->owner = n_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 266 | l_ptr->checkpoint = 1; |
Allan Stephens | f882cb7 | 2011-04-07 09:43:27 -0400 | [diff] [blame] | 267 | l_ptr->peer_session = INVALID_SESSION; |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 268 | l_ptr->bearer_id = b_ptr->identity; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 269 | link_set_supervision_props(l_ptr, b_ptr->tolerance); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 270 | l_ptr->state = RESET_UNKNOWN; |
| 271 | |
| 272 | l_ptr->pmsg = (struct tipc_msg *)&l_ptr->proto_msg; |
| 273 | msg = l_ptr->pmsg; |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 274 | tipc_msg_init(msg, LINK_PROTOCOL, RESET_MSG, INT_H_SIZE, l_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 275 | msg_set_size(msg, sizeof(l_ptr->proto_msg)); |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 276 | msg_set_session(msg, (tipc_random & 0xffff)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 277 | msg_set_bearer_id(msg, b_ptr->identity); |
| 278 | strcpy((char *)msg_data(msg), if_name); |
| 279 | |
| 280 | l_ptr->priority = b_ptr->priority; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 281 | tipc_link_set_queue_limits(l_ptr, b_ptr->window); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 282 | |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 283 | l_ptr->net_plane = b_ptr->net_plane; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 284 | link_init_max_pkt(l_ptr); |
| 285 | |
| 286 | l_ptr->next_out_no = 1; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 287 | __skb_queue_head_init(&l_ptr->waiting_sks); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 288 | |
| 289 | link_reset_statistics(l_ptr); |
| 290 | |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 291 | tipc_node_attach_link(n_ptr, l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 292 | |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 293 | k_init_timer(&l_ptr->timer, (Handler)link_timeout, |
| 294 | (unsigned long)l_ptr); |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 295 | |
| 296 | link_state_event(l_ptr, STARTING_EVT); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 297 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 298 | return l_ptr; |
| 299 | } |
| 300 | |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 301 | void tipc_link_delete_list(unsigned int bearer_id, bool shutting_down) |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 302 | { |
| 303 | struct tipc_link *l_ptr; |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 304 | struct tipc_node *n_ptr; |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 305 | |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 306 | rcu_read_lock(); |
| 307 | list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) { |
Ying Xue | 5356f3d | 2014-05-05 08:56:09 +0800 | [diff] [blame] | 308 | tipc_node_lock(n_ptr); |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 309 | l_ptr = n_ptr->links[bearer_id]; |
| 310 | if (l_ptr) { |
| 311 | tipc_link_reset(l_ptr); |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 312 | if (shutting_down || !tipc_node_is_up(n_ptr)) { |
| 313 | tipc_node_detach_link(l_ptr->owner, l_ptr); |
| 314 | tipc_link_reset_fragments(l_ptr); |
Ying Xue | 5356f3d | 2014-05-05 08:56:09 +0800 | [diff] [blame] | 315 | tipc_node_unlock(n_ptr); |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 316 | |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 317 | /* Nobody else can access this link now: */ |
| 318 | del_timer_sync(&l_ptr->timer); |
| 319 | kfree(l_ptr); |
| 320 | } else { |
| 321 | /* Detach/delete when failover is finished: */ |
| 322 | l_ptr->flags |= LINK_STOPPED; |
Ying Xue | 5356f3d | 2014-05-05 08:56:09 +0800 | [diff] [blame] | 323 | tipc_node_unlock(n_ptr); |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 324 | del_timer_sync(&l_ptr->timer); |
| 325 | } |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 326 | continue; |
| 327 | } |
Ying Xue | 5356f3d | 2014-05-05 08:56:09 +0800 | [diff] [blame] | 328 | tipc_node_unlock(n_ptr); |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 329 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 330 | rcu_read_unlock(); |
Ying Xue | 8d8439b | 2014-02-13 17:29:07 -0500 | [diff] [blame] | 331 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 332 | |
| 333 | /** |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 334 | * link_schedule_user - schedule user for wakeup after congestion |
| 335 | * @link: congested link |
| 336 | * @oport: sending port |
| 337 | * @chain_sz: size of buffer chain that was attempted sent |
| 338 | * @imp: importance of message attempted sent |
| 339 | * Create pseudo msg to send back to user when congestion abates |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 340 | */ |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 341 | static bool link_schedule_user(struct tipc_link *link, u32 oport, |
| 342 | uint chain_sz, uint imp) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 343 | { |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 344 | struct sk_buff *buf; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 345 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 346 | buf = tipc_msg_create(SOCK_WAKEUP, 0, INT_H_SIZE, 0, tipc_own_addr, |
| 347 | tipc_own_addr, oport, 0, 0); |
| 348 | if (!buf) |
| 349 | return false; |
| 350 | TIPC_SKB_CB(buf)->chain_sz = chain_sz; |
| 351 | TIPC_SKB_CB(buf)->chain_imp = imp; |
| 352 | __skb_queue_tail(&link->waiting_sks, buf); |
| 353 | link->stats.link_congs++; |
| 354 | return true; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 355 | } |
| 356 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 357 | /** |
| 358 | * link_prepare_wakeup - prepare users for wakeup after congestion |
| 359 | * @link: congested link |
| 360 | * Move a number of waiting users, as permitted by available space in |
| 361 | * the send queue, from link wait queue to node wait queue for wakeup |
| 362 | */ |
| 363 | static void link_prepare_wakeup(struct tipc_link *link) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 364 | { |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 365 | struct sk_buff_head *wq = &link->waiting_sks; |
| 366 | struct sk_buff *buf; |
| 367 | uint pend_qsz = link->out_queue_size; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 368 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 369 | for (buf = skb_peek(wq); buf; buf = skb_peek(wq)) { |
| 370 | if (pend_qsz >= link->queue_limit[TIPC_SKB_CB(buf)->chain_imp]) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 371 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 372 | pend_qsz += TIPC_SKB_CB(buf)->chain_sz; |
| 373 | __skb_queue_tail(&link->owner->waiting_sks, __skb_dequeue(wq)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 374 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 375 | } |
| 376 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 377 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 378 | * link_release_outqueue - purge link's outbound message queue |
| 379 | * @l_ptr: pointer to link |
| 380 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 381 | static void link_release_outqueue(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 382 | { |
Ying Xue | d77b383 | 2013-12-10 20:45:38 -0800 | [diff] [blame] | 383 | kfree_skb_list(l_ptr->first_out); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 384 | l_ptr->first_out = NULL; |
| 385 | l_ptr->out_queue_size = 0; |
| 386 | } |
| 387 | |
| 388 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 389 | * tipc_link_reset_fragments - purge link's inbound message fragments queue |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 390 | * @l_ptr: pointer to link |
| 391 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 392 | void tipc_link_reset_fragments(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 393 | { |
Jon Paul Maloy | 37e2216 | 2014-05-14 05:39:12 -0400 | [diff] [blame] | 394 | kfree_skb(l_ptr->reasm_buf); |
| 395 | l_ptr->reasm_buf = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 396 | } |
| 397 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 398 | /** |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 399 | * tipc_link_purge_queues - purge all pkt queues associated with link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 400 | * @l_ptr: pointer to link |
| 401 | */ |
Jon Paul Maloy | 581465f | 2014-01-07 17:02:44 -0500 | [diff] [blame] | 402 | void tipc_link_purge_queues(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 403 | { |
Ying Xue | d77b383 | 2013-12-10 20:45:38 -0800 | [diff] [blame] | 404 | kfree_skb_list(l_ptr->oldest_deferred_in); |
| 405 | kfree_skb_list(l_ptr->first_out); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 406 | tipc_link_reset_fragments(l_ptr); |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 407 | kfree_skb(l_ptr->proto_msg_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 408 | l_ptr->proto_msg_queue = NULL; |
| 409 | } |
| 410 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 411 | void tipc_link_reset(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 412 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 413 | u32 prev_state = l_ptr->state; |
| 414 | u32 checkpoint = l_ptr->next_in_no; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 415 | int was_active_link = tipc_link_is_active(l_ptr); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 416 | struct tipc_node *owner = l_ptr->owner; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 417 | |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 418 | 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] | 419 | |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 420 | /* Link is down, accept any session */ |
| 421 | l_ptr->peer_session = INVALID_SESSION; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 422 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 423 | /* Prepare for max packet size negotiation */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 424 | link_init_max_pkt(l_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 425 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 426 | l_ptr->state = RESET_UNKNOWN; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 427 | |
| 428 | if ((prev_state == RESET_UNKNOWN) || (prev_state == RESET_RESET)) |
| 429 | return; |
| 430 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 431 | tipc_node_link_down(l_ptr->owner, l_ptr); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 432 | tipc_bearer_remove_dest(l_ptr->bearer_id, l_ptr->addr); |
Paul Gortmaker | 7368ddf | 2010-10-12 14:25:58 +0000 | [diff] [blame] | 433 | |
Jon Paul Maloy | b9d4c33 | 2014-01-07 17:02:42 -0500 | [diff] [blame] | 434 | if (was_active_link && tipc_node_active_links(l_ptr->owner)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 435 | l_ptr->reset_checkpoint = checkpoint; |
| 436 | l_ptr->exp_msg_count = START_CHANGEOVER; |
| 437 | } |
| 438 | |
| 439 | /* Clean up all queues: */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 440 | link_release_outqueue(l_ptr); |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 441 | kfree_skb(l_ptr->proto_msg_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 442 | l_ptr->proto_msg_queue = NULL; |
Ying Xue | d77b383 | 2013-12-10 20:45:38 -0800 | [diff] [blame] | 443 | kfree_skb_list(l_ptr->oldest_deferred_in); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 444 | if (!skb_queue_empty(&l_ptr->waiting_sks)) { |
| 445 | skb_queue_splice_init(&l_ptr->waiting_sks, &owner->waiting_sks); |
| 446 | owner->action_flags |= TIPC_WAKEUP_USERS; |
| 447 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 448 | l_ptr->retransm_queue_head = 0; |
| 449 | l_ptr->retransm_queue_size = 0; |
| 450 | l_ptr->last_out = NULL; |
| 451 | l_ptr->first_out = NULL; |
| 452 | l_ptr->next_out = NULL; |
| 453 | l_ptr->unacked_window = 0; |
| 454 | l_ptr->checkpoint = 1; |
| 455 | l_ptr->next_out_no = 1; |
| 456 | l_ptr->deferred_inqueue_sz = 0; |
| 457 | l_ptr->oldest_deferred_in = NULL; |
| 458 | l_ptr->newest_deferred_in = NULL; |
| 459 | l_ptr->fsm_msg_cnt = 0; |
| 460 | l_ptr->stale_count = 0; |
| 461 | link_reset_statistics(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 462 | } |
| 463 | |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 464 | void tipc_link_reset_list(unsigned int bearer_id) |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 465 | { |
| 466 | struct tipc_link *l_ptr; |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 467 | struct tipc_node *n_ptr; |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 468 | |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 469 | rcu_read_lock(); |
| 470 | list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) { |
Ying Xue | 5356f3d | 2014-05-05 08:56:09 +0800 | [diff] [blame] | 471 | tipc_node_lock(n_ptr); |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 472 | l_ptr = n_ptr->links[bearer_id]; |
| 473 | if (l_ptr) |
| 474 | tipc_link_reset(l_ptr); |
Ying Xue | 5356f3d | 2014-05-05 08:56:09 +0800 | [diff] [blame] | 475 | tipc_node_unlock(n_ptr); |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 476 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 477 | rcu_read_unlock(); |
Ying Xue | e0ca2c3 | 2014-02-13 17:29:06 -0500 | [diff] [blame] | 478 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 479 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 480 | static void link_activate(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 481 | { |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 482 | l_ptr->next_in_no = l_ptr->stats.recv_info = 1; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 483 | tipc_node_link_up(l_ptr->owner, l_ptr); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 484 | tipc_bearer_add_dest(l_ptr->bearer_id, l_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | /** |
| 488 | * link_state_event - link finite state machine |
| 489 | * @l_ptr: pointer to link |
| 490 | * @event: state machine event to process |
| 491 | */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 492 | 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] | 493 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 494 | struct tipc_link *other; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 495 | u32 cont_intv = l_ptr->continuity_interval; |
| 496 | |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 497 | if (l_ptr->flags & LINK_STOPPED) |
| 498 | return; |
| 499 | |
Ying Xue | 135daee | 2014-02-13 17:29:08 -0500 | [diff] [blame] | 500 | if (!(l_ptr->flags & LINK_STARTED) && (event != STARTING_EVT)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 501 | return; /* Not yet. */ |
| 502 | |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 503 | /* Check whether changeover is going on */ |
| 504 | if (l_ptr->exp_msg_count) { |
Allan Stephens | a016892 | 2010-12-31 18:59:35 +0000 | [diff] [blame] | 505 | if (event == TIMEOUT_EVT) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 506 | link_set_timer(l_ptr, cont_intv); |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 507 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 508 | } |
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: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 515 | break; |
| 516 | case TIMEOUT_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 517 | if (l_ptr->next_in_no != l_ptr->checkpoint) { |
| 518 | l_ptr->checkpoint = l_ptr->next_in_no; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 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, |
| 521 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 522 | l_ptr->fsm_msg_cnt++; |
| 523 | } else if (l_ptr->max_pkt < l_ptr->max_pkt_target) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 524 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
| 525 | 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 526 | l_ptr->fsm_msg_cnt++; |
| 527 | } |
| 528 | link_set_timer(l_ptr, cont_intv); |
| 529 | break; |
| 530 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 531 | l_ptr->state = WORKING_UNKNOWN; |
| 532 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 533 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 534 | l_ptr->fsm_msg_cnt++; |
| 535 | link_set_timer(l_ptr, cont_intv / 4); |
| 536 | break; |
| 537 | case RESET_MSG: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 538 | pr_info("%s<%s>, requested by peer\n", link_rst_msg, |
| 539 | l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 540 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 541 | l_ptr->state = RESET_RESET; |
| 542 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 543 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
| 544 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 545 | l_ptr->fsm_msg_cnt++; |
| 546 | link_set_timer(l_ptr, cont_intv); |
| 547 | break; |
| 548 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 549 | pr_err("%s%u in WW state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 550 | } |
| 551 | break; |
| 552 | case WORKING_UNKNOWN: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 553 | switch (event) { |
| 554 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 555 | case ACTIVATE_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 556 | l_ptr->state = WORKING_WORKING; |
| 557 | l_ptr->fsm_msg_cnt = 0; |
| 558 | link_set_timer(l_ptr, cont_intv); |
| 559 | break; |
| 560 | case RESET_MSG: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 561 | pr_info("%s<%s>, requested by peer while probing\n", |
| 562 | link_rst_msg, l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 563 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 564 | l_ptr->state = RESET_RESET; |
| 565 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 566 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
| 567 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 568 | l_ptr->fsm_msg_cnt++; |
| 569 | link_set_timer(l_ptr, cont_intv); |
| 570 | break; |
| 571 | case TIMEOUT_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 572 | if (l_ptr->next_in_no != l_ptr->checkpoint) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 573 | l_ptr->state = WORKING_WORKING; |
| 574 | l_ptr->fsm_msg_cnt = 0; |
| 575 | l_ptr->checkpoint = l_ptr->next_in_no; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 576 | if (tipc_bclink_acks_missing(l_ptr->owner)) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 577 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
| 578 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 579 | l_ptr->fsm_msg_cnt++; |
| 580 | } |
| 581 | link_set_timer(l_ptr, cont_intv); |
| 582 | } else if (l_ptr->fsm_msg_cnt < l_ptr->abort_limit) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 583 | tipc_link_proto_xmit(l_ptr, STATE_MSG, |
| 584 | 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 585 | l_ptr->fsm_msg_cnt++; |
| 586 | link_set_timer(l_ptr, cont_intv / 4); |
| 587 | } else { /* Link has failed */ |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 588 | pr_warn("%s<%s>, peer not responding\n", |
| 589 | link_rst_msg, l_ptr->name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 590 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 591 | l_ptr->state = RESET_UNKNOWN; |
| 592 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 593 | tipc_link_proto_xmit(l_ptr, RESET_MSG, |
| 594 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 595 | l_ptr->fsm_msg_cnt++; |
| 596 | link_set_timer(l_ptr, cont_intv); |
| 597 | } |
| 598 | break; |
| 599 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 600 | pr_err("%s%u in WU state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 601 | } |
| 602 | break; |
| 603 | case RESET_UNKNOWN: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 604 | switch (event) { |
| 605 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 606 | break; |
| 607 | case ACTIVATE_MSG: |
| 608 | other = l_ptr->owner->active_links[0]; |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 609 | if (other && link_working_unknown(other)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 610 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 611 | l_ptr->state = WORKING_WORKING; |
| 612 | l_ptr->fsm_msg_cnt = 0; |
| 613 | link_activate(l_ptr); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 614 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 615 | l_ptr->fsm_msg_cnt++; |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 616 | if (l_ptr->owner->working_links == 1) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 617 | tipc_link_sync_xmit(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 618 | link_set_timer(l_ptr, cont_intv); |
| 619 | break; |
| 620 | case RESET_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 621 | l_ptr->state = RESET_RESET; |
| 622 | l_ptr->fsm_msg_cnt = 0; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 623 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
| 624 | 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 625 | l_ptr->fsm_msg_cnt++; |
| 626 | link_set_timer(l_ptr, cont_intv); |
| 627 | break; |
| 628 | case STARTING_EVT: |
Ying Xue | 135daee | 2014-02-13 17:29:08 -0500 | [diff] [blame] | 629 | l_ptr->flags |= LINK_STARTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 630 | /* fall through */ |
| 631 | case TIMEOUT_EVT: |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 632 | tipc_link_proto_xmit(l_ptr, RESET_MSG, 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 633 | l_ptr->fsm_msg_cnt++; |
| 634 | link_set_timer(l_ptr, cont_intv); |
| 635 | break; |
| 636 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 637 | pr_err("%s%u in RU state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 638 | } |
| 639 | break; |
| 640 | case RESET_RESET: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 641 | switch (event) { |
| 642 | case TRAFFIC_MSG_EVT: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 643 | case ACTIVATE_MSG: |
| 644 | other = l_ptr->owner->active_links[0]; |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 645 | if (other && link_working_unknown(other)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 646 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 647 | l_ptr->state = WORKING_WORKING; |
| 648 | l_ptr->fsm_msg_cnt = 0; |
| 649 | link_activate(l_ptr); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 650 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 1, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 651 | l_ptr->fsm_msg_cnt++; |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 652 | if (l_ptr->owner->working_links == 1) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 653 | tipc_link_sync_xmit(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 654 | link_set_timer(l_ptr, cont_intv); |
| 655 | break; |
| 656 | case RESET_MSG: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 657 | break; |
| 658 | case TIMEOUT_EVT: |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 659 | tipc_link_proto_xmit(l_ptr, ACTIVATE_MSG, |
| 660 | 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 661 | l_ptr->fsm_msg_cnt++; |
| 662 | link_set_timer(l_ptr, cont_intv); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 663 | break; |
| 664 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 665 | pr_err("%s%u in RR state\n", link_unk_evt, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 666 | } |
| 667 | break; |
| 668 | default: |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 669 | pr_err("Unknown link state %u/%u\n", l_ptr->state, event); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 670 | } |
| 671 | } |
| 672 | |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 673 | /* tipc_link_cong: determine return value and how to treat the |
| 674 | * sent buffer during link congestion. |
| 675 | * - For plain, errorless user data messages we keep the buffer and |
| 676 | * return -ELINKONG. |
| 677 | * - For all other messages we discard the buffer and return -EHOSTUNREACH |
| 678 | * - For TIPC internal messages we also reset the link |
| 679 | */ |
| 680 | static int tipc_link_cong(struct tipc_link *link, struct sk_buff *buf) |
| 681 | { |
| 682 | struct tipc_msg *msg = buf_msg(buf); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 683 | uint imp = tipc_msg_tot_importance(msg); |
| 684 | u32 oport = msg_tot_origport(msg); |
| 685 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 686 | if (unlikely(imp > TIPC_CRITICAL_IMPORTANCE)) { |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 687 | pr_warn("%s<%s>, send queue full", link_rst_msg, link->name); |
| 688 | tipc_link_reset(link); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 689 | goto drop; |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 690 | } |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 691 | if (unlikely(msg_errcode(msg))) |
| 692 | goto drop; |
| 693 | if (unlikely(msg_reroute_cnt(msg))) |
| 694 | goto drop; |
| 695 | if (TIPC_SKB_CB(buf)->wakeup_pending) |
| 696 | return -ELINKCONG; |
| 697 | if (link_schedule_user(link, oport, TIPC_SKB_CB(buf)->chain_sz, imp)) |
| 698 | return -ELINKCONG; |
| 699 | drop: |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 700 | kfree_skb_list(buf); |
| 701 | return -EHOSTUNREACH; |
| 702 | } |
| 703 | |
| 704 | /** |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 705 | * __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] | 706 | * @link: link to use |
| 707 | * @buf: chain of buffers containing message |
| 708 | * Consumes the buffer chain, except when returning -ELINKCONG |
| 709 | * Returns 0 if success, otherwise errno: -ELINKCONG, -EMSGSIZE (plain socket |
| 710 | * user data messages) or -EHOSTUNREACH (all other messages/senders) |
| 711 | * Only the socket functions tipc_send_stream() and tipc_send_packet() need |
| 712 | * to act on the return value, since they may need to do more send attempts. |
| 713 | */ |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 714 | int __tipc_link_xmit(struct tipc_link *link, struct sk_buff *buf) |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 715 | { |
| 716 | struct tipc_msg *msg = buf_msg(buf); |
| 717 | uint psz = msg_size(msg); |
| 718 | uint qsz = link->out_queue_size; |
| 719 | uint sndlim = link->queue_limit[0]; |
| 720 | uint imp = tipc_msg_tot_importance(msg); |
| 721 | uint mtu = link->max_pkt; |
| 722 | uint ack = mod(link->next_in_no - 1); |
| 723 | uint seqno = link->next_out_no; |
| 724 | uint bc_last_in = link->owner->bclink.last_in; |
| 725 | struct tipc_media_addr *addr = &link->media_addr; |
| 726 | struct sk_buff *next = buf->next; |
| 727 | |
| 728 | /* Match queue limits against msg importance: */ |
| 729 | if (unlikely(qsz >= link->queue_limit[imp])) |
| 730 | return tipc_link_cong(link, buf); |
| 731 | |
| 732 | /* Has valid packet limit been used ? */ |
| 733 | if (unlikely(psz > mtu)) { |
| 734 | kfree_skb_list(buf); |
| 735 | return -EMSGSIZE; |
| 736 | } |
| 737 | |
| 738 | /* Prepare each packet for sending, and add to outqueue: */ |
| 739 | while (buf) { |
| 740 | next = buf->next; |
| 741 | msg = buf_msg(buf); |
| 742 | msg_set_word(msg, 2, ((ack << 16) | mod(seqno))); |
| 743 | msg_set_bcast_ack(msg, bc_last_in); |
| 744 | |
| 745 | if (!link->first_out) { |
| 746 | link->first_out = buf; |
| 747 | } else if (qsz < sndlim) { |
| 748 | link->last_out->next = buf; |
| 749 | } else if (tipc_msg_bundle(link->last_out, buf, mtu)) { |
| 750 | link->stats.sent_bundled++; |
| 751 | buf = next; |
| 752 | next = buf->next; |
| 753 | continue; |
| 754 | } else if (tipc_msg_make_bundle(&buf, mtu, link->addr)) { |
| 755 | link->stats.sent_bundled++; |
| 756 | link->stats.sent_bundles++; |
| 757 | link->last_out->next = buf; |
| 758 | if (!link->next_out) |
| 759 | link->next_out = buf; |
| 760 | } else { |
| 761 | link->last_out->next = buf; |
| 762 | if (!link->next_out) |
| 763 | link->next_out = buf; |
| 764 | } |
| 765 | |
| 766 | /* Send packet if possible: */ |
| 767 | if (likely(++qsz <= sndlim)) { |
| 768 | tipc_bearer_send(link->bearer_id, buf, addr); |
| 769 | link->next_out = next; |
| 770 | link->unacked_window = 0; |
| 771 | } |
| 772 | seqno++; |
| 773 | link->last_out = buf; |
| 774 | buf = next; |
| 775 | } |
| 776 | link->next_out_no = seqno; |
| 777 | link->out_queue_size = qsz; |
| 778 | return 0; |
| 779 | } |
| 780 | |
| 781 | /** |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 782 | * tipc_link_xmit() is the general link level function for message sending |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 783 | * @buf: chain of buffers containing message |
| 784 | * @dsz: amount of user data to be sent |
| 785 | * @dnode: address of destination node |
| 786 | * @selector: a number used for deterministic link selection |
| 787 | * Consumes the buffer chain, except when returning -ELINKCONG |
| 788 | * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE |
| 789 | */ |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 790 | int tipc_link_xmit(struct sk_buff *buf, u32 dnode, u32 selector) |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 791 | { |
| 792 | struct tipc_link *link = NULL; |
| 793 | struct tipc_node *node; |
| 794 | int rc = -EHOSTUNREACH; |
| 795 | |
| 796 | node = tipc_node_find(dnode); |
| 797 | if (node) { |
| 798 | tipc_node_lock(node); |
| 799 | link = node->active_links[selector & 1]; |
| 800 | if (link) |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 801 | rc = __tipc_link_xmit(link, buf); |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 802 | tipc_node_unlock(node); |
| 803 | } |
| 804 | |
| 805 | if (link) |
| 806 | return rc; |
| 807 | |
| 808 | if (likely(in_own_node(dnode))) |
| 809 | return tipc_sk_rcv(buf); |
| 810 | |
| 811 | kfree_skb_list(buf); |
| 812 | return rc; |
| 813 | } |
| 814 | |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 815 | /* |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 816 | * tipc_link_sync_xmit - synchronize broadcast link endpoints. |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 817 | * |
| 818 | * Give a newly added peer node the sequence number where it should |
| 819 | * start receiving and acking broadcast packets. |
| 820 | * |
| 821 | * Called with node locked |
| 822 | */ |
Jon Paul Maloy | 25b660c | 2014-07-16 20:40:59 -0400 | [diff] [blame] | 823 | static void tipc_link_sync_xmit(struct tipc_link *link) |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 824 | { |
| 825 | struct sk_buff *buf; |
| 826 | struct tipc_msg *msg; |
| 827 | |
| 828 | buf = tipc_buf_acquire(INT_H_SIZE); |
| 829 | if (!buf) |
| 830 | return; |
| 831 | |
| 832 | msg = buf_msg(buf); |
Jon Paul Maloy | 25b660c | 2014-07-16 20:40:59 -0400 | [diff] [blame] | 833 | tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG, INT_H_SIZE, link->addr); |
| 834 | msg_set_last_bcast(msg, link->owner->bclink.acked); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 835 | __tipc_link_xmit(link, buf); |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 836 | } |
| 837 | |
| 838 | /* |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 839 | * tipc_link_sync_rcv - synchronize broadcast link endpoints. |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 840 | * Receive the sequence number where we should start receiving and |
| 841 | * acking broadcast packets from a newly added peer node, and open |
| 842 | * up for reception of such packets. |
| 843 | * |
| 844 | * Called with node locked |
| 845 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 846 | 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] | 847 | { |
| 848 | struct tipc_msg *msg = buf_msg(buf); |
| 849 | |
| 850 | n->bclink.last_sent = n->bclink.last_in = msg_last_bcast(msg); |
| 851 | n->bclink.recv_permitted = true; |
| 852 | kfree_skb(buf); |
| 853 | } |
| 854 | |
| 855 | /* |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 856 | * tipc_link_push_packet: Push one unsent packet to the media |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 857 | */ |
stephen hemminger | 9805696 | 2014-01-04 13:47:48 -0800 | [diff] [blame] | 858 | static u32 tipc_link_push_packet(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 859 | { |
| 860 | struct sk_buff *buf = l_ptr->first_out; |
| 861 | u32 r_q_size = l_ptr->retransm_queue_size; |
| 862 | u32 r_q_head = l_ptr->retransm_queue_head; |
| 863 | |
| 864 | /* Step to position where retransmission failed, if any, */ |
| 865 | /* consider that buffers may have been released in meantime */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 866 | if (r_q_size && buf) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 867 | u32 last = lesser(mod(r_q_head + r_q_size), |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 868 | link_last_sent(l_ptr)); |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 869 | u32 first = buf_seqno(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 870 | |
| 871 | while (buf && less(first, r_q_head)) { |
| 872 | first = mod(first + 1); |
| 873 | buf = buf->next; |
| 874 | } |
| 875 | l_ptr->retransm_queue_head = r_q_head = first; |
| 876 | l_ptr->retransm_queue_size = r_q_size = mod(last - first); |
| 877 | } |
| 878 | |
| 879 | /* Continue retransmission now, if there is anything: */ |
Neil Horman | ca50910 | 2010-03-15 07:58:45 +0000 | [diff] [blame] | 880 | if (r_q_size && buf) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 881 | msg_set_ack(buf_msg(buf), mod(l_ptr->next_in_no - 1)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 882 | msg_set_bcast_ack(buf_msg(buf), l_ptr->owner->bclink.last_in); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 883 | tipc_bearer_send(l_ptr->bearer_id, buf, &l_ptr->media_addr); |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 884 | l_ptr->retransm_queue_head = mod(++r_q_head); |
| 885 | l_ptr->retransm_queue_size = --r_q_size; |
| 886 | l_ptr->stats.retransmitted++; |
| 887 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 888 | } |
| 889 | |
| 890 | /* Send deferred protocol message, if any: */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 891 | buf = l_ptr->proto_msg_queue; |
| 892 | if (buf) { |
| 893 | msg_set_ack(buf_msg(buf), mod(l_ptr->next_in_no - 1)); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 894 | msg_set_bcast_ack(buf_msg(buf), l_ptr->owner->bclink.last_in); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 895 | tipc_bearer_send(l_ptr->bearer_id, buf, &l_ptr->media_addr); |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 896 | l_ptr->unacked_window = 0; |
| 897 | kfree_skb(buf); |
| 898 | l_ptr->proto_msg_queue = NULL; |
| 899 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 900 | } |
| 901 | |
| 902 | /* Send one deferred data message, if send window not full: */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 903 | buf = l_ptr->next_out; |
| 904 | if (buf) { |
| 905 | struct tipc_msg *msg = buf_msg(buf); |
| 906 | u32 next = msg_seqno(msg); |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 907 | u32 first = buf_seqno(l_ptr->first_out); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 908 | |
| 909 | if (mod(next - first) < l_ptr->queue_limit[0]) { |
| 910 | msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 911 | msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 912 | tipc_bearer_send(l_ptr->bearer_id, buf, |
| 913 | &l_ptr->media_addr); |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 914 | if (msg_user(msg) == MSG_BUNDLER) |
Jon Paul Maloy | 4f1688b | 2014-06-25 20:41:32 -0500 | [diff] [blame] | 915 | msg_set_type(msg, BUNDLE_CLOSED); |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 916 | l_ptr->next_out = buf->next; |
| 917 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 918 | } |
| 919 | } |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 920 | return 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 921 | } |
| 922 | |
| 923 | /* |
| 924 | * push_queue(): push out the unsent messages of a link where |
| 925 | * congestion has abated. Node is locked |
| 926 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 927 | void tipc_link_push_queue(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 928 | { |
| 929 | u32 res; |
| 930 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 931 | do { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 932 | res = tipc_link_push_packet(l_ptr); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 933 | } while (!res); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 934 | } |
| 935 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 936 | void tipc_link_reset_all(struct tipc_node *node) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 937 | { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 938 | char addr_string[16]; |
| 939 | u32 i; |
| 940 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 941 | tipc_node_lock(node); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 942 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 943 | pr_warn("Resetting all links to %s\n", |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 944 | tipc_addr_string_fill(addr_string, node->addr)); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 945 | |
| 946 | for (i = 0; i < MAX_BEARERS; i++) { |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 947 | if (node->links[i]) { |
| 948 | link_print(node->links[i], "Resetting link\n"); |
| 949 | tipc_link_reset(node->links[i]); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 950 | } |
| 951 | } |
| 952 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 953 | tipc_node_unlock(node); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 954 | } |
| 955 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 956 | static void link_retransmit_failure(struct tipc_link *l_ptr, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 957 | struct sk_buff *buf) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 958 | { |
| 959 | struct tipc_msg *msg = buf_msg(buf); |
| 960 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 961 | pr_warn("Retransmission failure on link <%s>\n", l_ptr->name); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 962 | |
| 963 | if (l_ptr->addr) { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 964 | /* Handle failure on standard link */ |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 965 | link_print(l_ptr, "Resetting link\n"); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 966 | tipc_link_reset(l_ptr); |
| 967 | |
| 968 | } else { |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 969 | /* Handle failure on broadcast link */ |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 970 | struct tipc_node *n_ptr; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 971 | char addr_string[16]; |
| 972 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 973 | pr_info("Msg seq number: %u, ", msg_seqno(msg)); |
| 974 | pr_cont("Outstanding acks: %lu\n", |
| 975 | (unsigned long) TIPC_SKB_CB(buf)->handle); |
Jeff Garzik | 617dbea | 2006-10-03 16:25:34 -0700 | [diff] [blame] | 976 | |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 977 | n_ptr = tipc_bclink_retransmit_to(); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 978 | tipc_node_lock(n_ptr); |
| 979 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 980 | tipc_addr_string_fill(addr_string, n_ptr->addr); |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 981 | pr_info("Broadcast link info for %s\n", addr_string); |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 982 | pr_info("Reception permitted: %d, Acked: %u\n", |
| 983 | n_ptr->bclink.recv_permitted, |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 984 | n_ptr->bclink.acked); |
| 985 | pr_info("Last in: %u, Oos state: %u, Last sent: %u\n", |
| 986 | n_ptr->bclink.last_in, |
| 987 | n_ptr->bclink.oos_state, |
| 988 | n_ptr->bclink.last_sent); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 989 | |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 990 | tipc_node_unlock(n_ptr); |
| 991 | |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 992 | tipc_bclink_set_flags(TIPC_BCLINK_RESET); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 993 | l_ptr->stale_count = 0; |
| 994 | } |
| 995 | } |
| 996 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 997 | void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *buf, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 998 | u32 retransmits) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 999 | { |
| 1000 | struct tipc_msg *msg; |
| 1001 | |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 1002 | if (!buf) |
| 1003 | return; |
| 1004 | |
| 1005 | msg = buf_msg(buf); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1006 | |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 1007 | /* Detect repeated retransmit failures */ |
| 1008 | if (l_ptr->last_retransmitted == msg_seqno(msg)) { |
| 1009 | if (++l_ptr->stale_count > 100) { |
| 1010 | link_retransmit_failure(l_ptr, buf); |
| 1011 | return; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 1012 | } |
| 1013 | } else { |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 1014 | l_ptr->last_retransmitted = msg_seqno(msg); |
| 1015 | l_ptr->stale_count = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1016 | } |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 1017 | |
Neil Horman | ca50910 | 2010-03-15 07:58:45 +0000 | [diff] [blame] | 1018 | while (retransmits && (buf != l_ptr->next_out) && buf) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1019 | msg = buf_msg(buf); |
| 1020 | msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1021 | msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1022 | tipc_bearer_send(l_ptr->bearer_id, buf, &l_ptr->media_addr); |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 1023 | buf = buf->next; |
| 1024 | retransmits--; |
| 1025 | l_ptr->stats.retransmitted++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1026 | } |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 1027 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1028 | l_ptr->retransm_queue_head = l_ptr->retransm_queue_size = 0; |
| 1029 | } |
| 1030 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1031 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1032 | * link_insert_deferred_queue - insert deferred messages back into receive chain |
| 1033 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1034 | static struct sk_buff *link_insert_deferred_queue(struct tipc_link *l_ptr, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1035 | struct sk_buff *buf) |
| 1036 | { |
| 1037 | u32 seq_no; |
| 1038 | |
| 1039 | if (l_ptr->oldest_deferred_in == NULL) |
| 1040 | return buf; |
| 1041 | |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1042 | seq_no = buf_seqno(l_ptr->oldest_deferred_in); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1043 | if (seq_no == mod(l_ptr->next_in_no)) { |
| 1044 | l_ptr->newest_deferred_in->next = buf; |
| 1045 | buf = l_ptr->oldest_deferred_in; |
| 1046 | l_ptr->oldest_deferred_in = NULL; |
| 1047 | l_ptr->deferred_inqueue_sz = 0; |
| 1048 | } |
| 1049 | return buf; |
| 1050 | } |
| 1051 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1052 | /** |
| 1053 | * link_recv_buf_validate - validate basic format of received message |
| 1054 | * |
| 1055 | * This routine ensures a TIPC message has an acceptable header, and at least |
| 1056 | * as much data as the header indicates it should. The routine also ensures |
| 1057 | * that the entire message header is stored in the main fragment of the message |
| 1058 | * buffer, to simplify future access to message header fields. |
| 1059 | * |
| 1060 | * Note: Having extra info present in the message header or data areas is OK. |
| 1061 | * TIPC will ignore the excess, under the assumption that it is optional info |
| 1062 | * introduced by a later release of the protocol. |
| 1063 | */ |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1064 | static int link_recv_buf_validate(struct sk_buff *buf) |
| 1065 | { |
| 1066 | static u32 min_data_hdr_size[8] = { |
Allan Stephens | 741d9eb | 2011-05-31 15:03:18 -0400 | [diff] [blame] | 1067 | SHORT_H_SIZE, MCAST_H_SIZE, NAMED_H_SIZE, BASIC_H_SIZE, |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1068 | MAX_H_SIZE, MAX_H_SIZE, MAX_H_SIZE, MAX_H_SIZE |
| 1069 | }; |
| 1070 | |
| 1071 | struct tipc_msg *msg; |
| 1072 | u32 tipc_hdr[2]; |
| 1073 | u32 size; |
| 1074 | u32 hdr_size; |
| 1075 | u32 min_hdr_size; |
| 1076 | |
Erik Hugne | 64380a0 | 2014-02-11 11:38:26 +0100 | [diff] [blame] | 1077 | /* If this packet comes from the defer queue, the skb has already |
| 1078 | * been validated |
| 1079 | */ |
| 1080 | if (unlikely(TIPC_SKB_CB(buf)->deferred)) |
| 1081 | return 1; |
| 1082 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1083 | if (unlikely(buf->len < MIN_H_SIZE)) |
| 1084 | return 0; |
| 1085 | |
| 1086 | msg = skb_header_pointer(buf, 0, sizeof(tipc_hdr), tipc_hdr); |
| 1087 | if (msg == NULL) |
| 1088 | return 0; |
| 1089 | |
| 1090 | if (unlikely(msg_version(msg) != TIPC_VERSION)) |
| 1091 | return 0; |
| 1092 | |
| 1093 | size = msg_size(msg); |
| 1094 | hdr_size = msg_hdr_sz(msg); |
| 1095 | min_hdr_size = msg_isdata(msg) ? |
| 1096 | min_data_hdr_size[msg_type(msg)] : INT_H_SIZE; |
| 1097 | |
| 1098 | if (unlikely((hdr_size < min_hdr_size) || |
| 1099 | (size < hdr_size) || |
| 1100 | (buf->len < size) || |
| 1101 | (size - hdr_size > TIPC_MAX_USER_MSG_SIZE))) |
| 1102 | return 0; |
| 1103 | |
| 1104 | return pskb_may_pull(buf, hdr_size); |
| 1105 | } |
| 1106 | |
Allan Stephens | b02b69c | 2010-08-17 11:00:07 +0000 | [diff] [blame] | 1107 | /** |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1108 | * tipc_rcv - process TIPC packets/messages arriving from off-node |
Allan Stephens | b02b69c | 2010-08-17 11:00:07 +0000 | [diff] [blame] | 1109 | * @head: pointer to message buffer chain |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1110 | * @b_ptr: pointer to bearer message arrived on |
Allan Stephens | b02b69c | 2010-08-17 11:00:07 +0000 | [diff] [blame] | 1111 | * |
| 1112 | * Invoked with no locks held. Bearer pointer must point to a valid bearer |
| 1113 | * structure (i.e. cannot be NULL), but bearer can be inactive. |
| 1114 | */ |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1115 | void tipc_rcv(struct sk_buff *head, struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1116 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1117 | while (head) { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 1118 | struct tipc_node *n_ptr; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1119 | struct tipc_link *l_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1120 | struct sk_buff *crs; |
| 1121 | struct sk_buff *buf = head; |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1122 | struct tipc_msg *msg; |
| 1123 | u32 seq_no; |
| 1124 | u32 ackd; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1125 | u32 released = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1126 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1127 | head = head->next; |
Erik Hugne | 732256b | 2014-01-07 15:51:36 -0500 | [diff] [blame] | 1128 | buf->next = NULL; |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1129 | |
| 1130 | /* Ensure message is well-formed */ |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1131 | if (unlikely(!link_recv_buf_validate(buf))) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1132 | goto discard; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1133 | |
Allan Stephens | fe13dda | 2008-04-15 19:03:23 -0700 | [diff] [blame] | 1134 | /* Ensure message data is a single contiguous unit */ |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1135 | if (unlikely(skb_linearize(buf))) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1136 | goto discard; |
Allan Stephens | fe13dda | 2008-04-15 19:03:23 -0700 | [diff] [blame] | 1137 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1138 | /* Handle arrival of a non-unicast link message */ |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1139 | msg = buf_msg(buf); |
| 1140 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1141 | if (unlikely(msg_non_seq(msg))) { |
Allan Stephens | 1265a02 | 2008-06-04 17:32:35 -0700 | [diff] [blame] | 1142 | if (msg_user(msg) == LINK_CONFIG) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1143 | tipc_disc_rcv(buf, b_ptr); |
Allan Stephens | 1265a02 | 2008-06-04 17:32:35 -0700 | [diff] [blame] | 1144 | else |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1145 | tipc_bclink_rcv(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1146 | continue; |
| 1147 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1148 | |
Allan Stephens | ed33a9c | 2011-04-05 15:15:04 -0400 | [diff] [blame] | 1149 | /* Discard unicast link messages destined for another node */ |
Allan Stephens | 2600824 | 2006-06-25 23:39:31 -0700 | [diff] [blame] | 1150 | if (unlikely(!msg_short(msg) && |
| 1151 | (msg_destnode(msg) != tipc_own_addr))) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1152 | goto discard; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1153 | |
Allan Stephens | 5a68d5e | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 1154 | /* Locate neighboring node that sent message */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1155 | n_ptr = tipc_node_find(msg_prevnode(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1156 | if (unlikely(!n_ptr)) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1157 | goto discard; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1158 | tipc_node_lock(n_ptr); |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1159 | |
Allan Stephens | 5a68d5e | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 1160 | /* Locate unicast link endpoint that should handle message */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1161 | l_ptr = n_ptr->links[b_ptr->identity]; |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1162 | if (unlikely(!l_ptr)) |
| 1163 | goto unlock_discard; |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1164 | |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1165 | /* Verify that communication with node is currently allowed */ |
Ying Xue | aecb9bb | 2014-05-08 08:54:39 +0800 | [diff] [blame] | 1166 | if ((n_ptr->action_flags & TIPC_WAIT_PEER_LINKS_DOWN) && |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1167 | msg_user(msg) == LINK_PROTOCOL && |
| 1168 | (msg_type(msg) == RESET_MSG || |
| 1169 | msg_type(msg) == ACTIVATE_MSG) && |
| 1170 | !msg_redundant_link(msg)) |
Ying Xue | aecb9bb | 2014-05-08 08:54:39 +0800 | [diff] [blame] | 1171 | n_ptr->action_flags &= ~TIPC_WAIT_PEER_LINKS_DOWN; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1172 | |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1173 | if (tipc_node_blocked(n_ptr)) |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1174 | goto unlock_discard; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1175 | |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1176 | /* Validate message sequence number info */ |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1177 | seq_no = msg_seqno(msg); |
| 1178 | ackd = msg_ack(msg); |
| 1179 | |
| 1180 | /* Release acked messages */ |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 1181 | if (n_ptr->bclink.recv_permitted) |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 1182 | tipc_bclink_acknowledge(n_ptr, msg_bcast_ack(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1183 | |
| 1184 | crs = l_ptr->first_out; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1185 | while ((crs != l_ptr->next_out) && |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1186 | less_eq(buf_seqno(crs), ackd)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1187 | struct sk_buff *next = crs->next; |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1188 | kfree_skb(crs); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1189 | crs = next; |
| 1190 | released++; |
| 1191 | } |
| 1192 | if (released) { |
| 1193 | l_ptr->first_out = crs; |
| 1194 | l_ptr->out_queue_size -= released; |
| 1195 | } |
Allan Stephens | 8503556 | 2008-04-15 19:04:54 -0700 | [diff] [blame] | 1196 | |
| 1197 | /* Try sending any messages link endpoint has pending */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1198 | if (unlikely(l_ptr->next_out)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1199 | tipc_link_push_queue(l_ptr); |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1200 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1201 | if (released && !skb_queue_empty(&l_ptr->waiting_sks)) { |
| 1202 | link_prepare_wakeup(l_ptr); |
| 1203 | l_ptr->owner->action_flags |= TIPC_WAKEUP_USERS; |
| 1204 | } |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1205 | |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1206 | /* Process the incoming packet */ |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1207 | if (unlikely(!link_working_working(l_ptr))) { |
| 1208 | if (msg_user(msg) == LINK_PROTOCOL) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1209 | tipc_link_proto_rcv(l_ptr, buf); |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1210 | head = link_insert_deferred_queue(l_ptr, head); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1211 | tipc_node_unlock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1212 | continue; |
| 1213 | } |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1214 | |
| 1215 | /* Traffic message. Conditionally activate link */ |
| 1216 | link_state_event(l_ptr, TRAFFIC_MSG_EVT); |
| 1217 | |
| 1218 | if (link_working_working(l_ptr)) { |
| 1219 | /* Re-insert buffer in front of queue */ |
| 1220 | buf->next = head; |
| 1221 | head = buf; |
| 1222 | tipc_node_unlock(n_ptr); |
| 1223 | continue; |
| 1224 | } |
| 1225 | goto unlock_discard; |
| 1226 | } |
| 1227 | |
| 1228 | /* Link is now in state WORKING_WORKING */ |
| 1229 | if (unlikely(seq_no != mod(l_ptr->next_in_no))) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1230 | link_handle_out_of_seq_msg(l_ptr, buf); |
| 1231 | head = link_insert_deferred_queue(l_ptr, head); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1232 | tipc_node_unlock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1233 | continue; |
| 1234 | } |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1235 | l_ptr->next_in_no++; |
| 1236 | if (unlikely(l_ptr->oldest_deferred_in)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1237 | head = link_insert_deferred_queue(l_ptr, head); |
Jon Paul Maloy | a537783 | 2014-02-13 17:29:15 -0500 | [diff] [blame] | 1238 | |
Erik Hugne | 3f53bd8 | 2014-07-01 10:22:41 +0200 | [diff] [blame] | 1239 | if (unlikely(++l_ptr->unacked_window >= TIPC_MIN_LINK_WIN)) { |
| 1240 | l_ptr->stats.sent_acks++; |
| 1241 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0); |
| 1242 | } |
| 1243 | |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1244 | if (tipc_link_prepare_input(l_ptr, &buf)) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1245 | tipc_node_unlock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1246 | continue; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1247 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1248 | tipc_node_unlock(n_ptr); |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1249 | msg = buf_msg(buf); |
| 1250 | if (tipc_link_input(l_ptr, buf) != 0) |
| 1251 | goto discard; |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1252 | continue; |
| 1253 | unlock_discard: |
Ying Xue | 3af390e | 2013-10-30 11:26:57 +0800 | [diff] [blame] | 1254 | tipc_node_unlock(n_ptr); |
| 1255 | discard: |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1256 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1257 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1258 | } |
| 1259 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 1260 | /** |
Erik Hugne | 7ae934b | 2014-07-01 10:22:40 +0200 | [diff] [blame] | 1261 | * tipc_link_prepare_input - process TIPC link messages |
| 1262 | * |
| 1263 | * returns nonzero if the message was consumed |
| 1264 | * |
| 1265 | * Node lock must be held |
| 1266 | */ |
| 1267 | static int tipc_link_prepare_input(struct tipc_link *l, struct sk_buff **buf) |
| 1268 | { |
| 1269 | struct tipc_node *n; |
| 1270 | struct tipc_msg *msg; |
| 1271 | int res = -EINVAL; |
| 1272 | |
| 1273 | n = l->owner; |
| 1274 | msg = buf_msg(*buf); |
| 1275 | switch (msg_user(msg)) { |
| 1276 | case CHANGEOVER_PROTOCOL: |
| 1277 | if (tipc_link_tunnel_rcv(n, buf)) |
| 1278 | res = 0; |
| 1279 | break; |
| 1280 | case MSG_FRAGMENTER: |
| 1281 | l->stats.recv_fragments++; |
| 1282 | if (tipc_buf_append(&l->reasm_buf, buf)) { |
| 1283 | l->stats.recv_fragmented++; |
| 1284 | res = 0; |
| 1285 | } else if (!l->reasm_buf) { |
| 1286 | tipc_link_reset(l); |
| 1287 | } |
| 1288 | break; |
| 1289 | case MSG_BUNDLER: |
| 1290 | l->stats.recv_bundles++; |
| 1291 | l->stats.recv_bundled += msg_msgcnt(msg); |
| 1292 | res = 0; |
| 1293 | break; |
| 1294 | case NAME_DISTRIBUTOR: |
| 1295 | n->bclink.recv_permitted = true; |
| 1296 | res = 0; |
| 1297 | break; |
| 1298 | case BCAST_PROTOCOL: |
| 1299 | tipc_link_sync_rcv(n, *buf); |
| 1300 | break; |
| 1301 | default: |
| 1302 | res = 0; |
| 1303 | } |
| 1304 | return res; |
| 1305 | } |
| 1306 | /** |
| 1307 | * tipc_link_input - Deliver message too higher layers |
| 1308 | */ |
| 1309 | static int tipc_link_input(struct tipc_link *l, struct sk_buff *buf) |
| 1310 | { |
| 1311 | struct tipc_msg *msg = buf_msg(buf); |
| 1312 | int res = 0; |
| 1313 | |
| 1314 | switch (msg_user(msg)) { |
| 1315 | case TIPC_LOW_IMPORTANCE: |
| 1316 | case TIPC_MEDIUM_IMPORTANCE: |
| 1317 | case TIPC_HIGH_IMPORTANCE: |
| 1318 | case TIPC_CRITICAL_IMPORTANCE: |
| 1319 | case CONN_MANAGER: |
| 1320 | tipc_sk_rcv(buf); |
| 1321 | break; |
| 1322 | case NAME_DISTRIBUTOR: |
| 1323 | tipc_named_rcv(buf); |
| 1324 | break; |
| 1325 | case MSG_BUNDLER: |
| 1326 | tipc_link_bundle_rcv(buf); |
| 1327 | break; |
| 1328 | default: |
| 1329 | res = -EINVAL; |
| 1330 | } |
| 1331 | return res; |
| 1332 | } |
| 1333 | |
| 1334 | /** |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1335 | * tipc_link_defer_pkt - Add out-of-sequence message to deferred reception queue |
| 1336 | * |
| 1337 | * Returns increase in queue length (i.e. 0 or 1) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1338 | */ |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1339 | u32 tipc_link_defer_pkt(struct sk_buff **head, struct sk_buff **tail, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1340 | struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1341 | { |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1342 | struct sk_buff *queue_buf; |
| 1343 | struct sk_buff **prev; |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1344 | u32 seq_no = buf_seqno(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1345 | |
| 1346 | buf->next = NULL; |
| 1347 | |
| 1348 | /* Empty queue ? */ |
| 1349 | if (*head == NULL) { |
| 1350 | *head = *tail = buf; |
| 1351 | return 1; |
| 1352 | } |
| 1353 | |
| 1354 | /* Last ? */ |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1355 | if (less(buf_seqno(*tail), seq_no)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1356 | (*tail)->next = buf; |
| 1357 | *tail = buf; |
| 1358 | return 1; |
| 1359 | } |
| 1360 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1361 | /* Locate insertion point in queue, then insert; discard if duplicate */ |
| 1362 | prev = head; |
| 1363 | queue_buf = *head; |
| 1364 | for (;;) { |
| 1365 | u32 curr_seqno = buf_seqno(queue_buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1366 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1367 | if (seq_no == curr_seqno) { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1368 | kfree_skb(buf); |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1369 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1370 | } |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1371 | |
| 1372 | if (less(seq_no, curr_seqno)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1373 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1374 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1375 | prev = &queue_buf->next; |
| 1376 | queue_buf = queue_buf->next; |
| 1377 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1378 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1379 | buf->next = queue_buf; |
| 1380 | *prev = buf; |
| 1381 | return 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1382 | } |
| 1383 | |
Allan Stephens | 8809b25 | 2011-10-25 10:44:35 -0400 | [diff] [blame] | 1384 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1385 | * link_handle_out_of_seq_msg - handle arrival of out-of-sequence packet |
| 1386 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1387 | 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] | 1388 | struct sk_buff *buf) |
| 1389 | { |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1390 | u32 seq_no = buf_seqno(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1391 | |
| 1392 | if (likely(msg_user(buf_msg(buf)) == LINK_PROTOCOL)) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1393 | tipc_link_proto_rcv(l_ptr, buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1394 | return; |
| 1395 | } |
| 1396 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1397 | /* Record OOS packet arrival (force mismatch on next timeout) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1398 | l_ptr->checkpoint--; |
| 1399 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1400 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1401 | * Discard packet if a duplicate; otherwise add it to deferred queue |
| 1402 | * and notify peer of gap as per protocol specification |
| 1403 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1404 | if (less(seq_no, mod(l_ptr->next_in_no))) { |
| 1405 | l_ptr->stats.duplicates++; |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1406 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1407 | return; |
| 1408 | } |
| 1409 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1410 | if (tipc_link_defer_pkt(&l_ptr->oldest_deferred_in, |
| 1411 | &l_ptr->newest_deferred_in, buf)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1412 | l_ptr->deferred_inqueue_sz++; |
| 1413 | l_ptr->stats.deferred_recv++; |
Erik Hugne | 64380a0 | 2014-02-11 11:38:26 +0100 | [diff] [blame] | 1414 | TIPC_SKB_CB(buf)->deferred = true; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1415 | if ((l_ptr->deferred_inqueue_sz % 16) == 1) |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1416 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1417 | } else |
| 1418 | l_ptr->stats.duplicates++; |
| 1419 | } |
| 1420 | |
| 1421 | /* |
| 1422 | * Send protocol message to the other endpoint. |
| 1423 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1424 | void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg, |
| 1425 | u32 gap, u32 tolerance, u32 priority, u32 ack_mtu) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1426 | { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 1427 | struct sk_buff *buf = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1428 | struct tipc_msg *msg = l_ptr->pmsg; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1429 | u32 msg_size = sizeof(l_ptr->proto_msg); |
Allan Stephens | 75f0aa4 | 2011-02-28 15:30:20 -0500 | [diff] [blame] | 1430 | int r_flag; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1431 | |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1432 | /* Discard any previous message that was deferred due to congestion */ |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1433 | if (l_ptr->proto_msg_queue) { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1434 | kfree_skb(l_ptr->proto_msg_queue); |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1435 | l_ptr->proto_msg_queue = NULL; |
| 1436 | } |
| 1437 | |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 1438 | /* Don't send protocol message during link changeover */ |
| 1439 | if (l_ptr->exp_msg_count) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1440 | return; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1441 | |
| 1442 | /* Abort non-RESET send if communication with node is prohibited */ |
Ying Xue | 10f465c | 2014-05-05 08:56:11 +0800 | [diff] [blame] | 1443 | if ((tipc_node_blocked(l_ptr->owner)) && (msg_typ != RESET_MSG)) |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1444 | return; |
| 1445 | |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1446 | /* Create protocol message with "out-of-sequence" sequence number */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1447 | msg_set_type(msg, msg_typ); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1448 | msg_set_net_plane(msg, l_ptr->net_plane); |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1449 | msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1450 | msg_set_last_bcast(msg, tipc_bclink_get_last_sent()); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1451 | |
| 1452 | if (msg_typ == STATE_MSG) { |
| 1453 | u32 next_sent = mod(l_ptr->next_out_no); |
| 1454 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1455 | if (!tipc_link_is_up(l_ptr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1456 | return; |
| 1457 | if (l_ptr->next_out) |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1458 | next_sent = buf_seqno(l_ptr->next_out); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1459 | msg_set_next_sent(msg, next_sent); |
| 1460 | if (l_ptr->oldest_deferred_in) { |
Allan Stephens | f905730 | 2011-10-24 16:03:12 -0400 | [diff] [blame] | 1461 | u32 rec = buf_seqno(l_ptr->oldest_deferred_in); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1462 | gap = mod(rec - mod(l_ptr->next_in_no)); |
| 1463 | } |
| 1464 | msg_set_seq_gap(msg, gap); |
| 1465 | if (gap) |
| 1466 | l_ptr->stats.sent_nacks++; |
| 1467 | msg_set_link_tolerance(msg, tolerance); |
| 1468 | msg_set_linkprio(msg, priority); |
| 1469 | msg_set_max_pkt(msg, ack_mtu); |
| 1470 | msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); |
| 1471 | msg_set_probe(msg, probe_msg != 0); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1472 | if (probe_msg) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1473 | u32 mtu = l_ptr->max_pkt; |
| 1474 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1475 | if ((mtu < l_ptr->max_pkt_target) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1476 | link_working_working(l_ptr) && |
| 1477 | l_ptr->fsm_msg_cnt) { |
| 1478 | msg_size = (mtu + (l_ptr->max_pkt_target - mtu)/2 + 2) & ~3; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1479 | if (l_ptr->max_pkt_probes == 10) { |
| 1480 | l_ptr->max_pkt_target = (msg_size - 4); |
| 1481 | l_ptr->max_pkt_probes = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1482 | msg_size = (mtu + (l_ptr->max_pkt_target - mtu)/2 + 2) & ~3; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1483 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1484 | l_ptr->max_pkt_probes++; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1485 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1486 | |
| 1487 | l_ptr->stats.sent_probes++; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1488 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1489 | l_ptr->stats.sent_states++; |
| 1490 | } else { /* RESET_MSG or ACTIVATE_MSG */ |
| 1491 | msg_set_ack(msg, mod(l_ptr->reset_checkpoint - 1)); |
| 1492 | msg_set_seq_gap(msg, 0); |
| 1493 | msg_set_next_sent(msg, 1); |
Allan Stephens | f23d9bf | 2011-01-18 15:15:34 -0500 | [diff] [blame] | 1494 | msg_set_probe(msg, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1495 | msg_set_link_tolerance(msg, l_ptr->tolerance); |
| 1496 | msg_set_linkprio(msg, l_ptr->priority); |
| 1497 | msg_set_max_pkt(msg, l_ptr->max_pkt_target); |
| 1498 | } |
| 1499 | |
Allan Stephens | 75f0aa4 | 2011-02-28 15:30:20 -0500 | [diff] [blame] | 1500 | r_flag = (l_ptr->owner->working_links > tipc_link_is_up(l_ptr)); |
| 1501 | msg_set_redundant_link(msg, r_flag); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1502 | msg_set_linkprio(msg, l_ptr->priority); |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1503 | msg_set_size(msg, msg_size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1504 | |
| 1505 | msg_set_seqno(msg, mod(l_ptr->next_out_no + (0xffff/2))); |
| 1506 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 1507 | buf = tipc_buf_acquire(msg_size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1508 | if (!buf) |
| 1509 | return; |
| 1510 | |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 1511 | skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg)); |
Ying Xue | 796c75d | 2013-06-17 10:54:48 -0400 | [diff] [blame] | 1512 | buf->priority = TC_PRIO_CONTROL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1513 | |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1514 | tipc_bearer_send(l_ptr->bearer_id, buf, &l_ptr->media_addr); |
Allan Stephens | 92d2c90 | 2011-10-25 11:20:26 -0400 | [diff] [blame] | 1515 | l_ptr->unacked_window = 0; |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1516 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1517 | } |
| 1518 | |
| 1519 | /* |
| 1520 | * Receive protocol message : |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1521 | * Note that network plane id propagates through the network, and may |
| 1522 | * change at any time. The node with lowest address rules |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1523 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1524 | static void tipc_link_proto_rcv(struct tipc_link *l_ptr, struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1525 | { |
| 1526 | u32 rec_gap = 0; |
| 1527 | u32 max_pkt_info; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1528 | u32 max_pkt_ack; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1529 | u32 msg_tol; |
| 1530 | struct tipc_msg *msg = buf_msg(buf); |
| 1531 | |
Ying Xue | 77a7e07 | 2013-12-10 20:45:44 -0800 | [diff] [blame] | 1532 | /* Discard protocol message during link changeover */ |
| 1533 | if (l_ptr->exp_msg_count) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1534 | goto exit; |
| 1535 | |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1536 | if (l_ptr->net_plane != msg_net_plane(msg)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1537 | if (tipc_own_addr > msg_prevnode(msg)) |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1538 | l_ptr->net_plane = msg_net_plane(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1539 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1540 | switch (msg_type(msg)) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1541 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1542 | case RESET_MSG: |
Allan Stephens | a686e68 | 2008-06-04 17:29:39 -0700 | [diff] [blame] | 1543 | if (!link_working_unknown(l_ptr) && |
| 1544 | (l_ptr->peer_session != INVALID_SESSION)) { |
Allan Stephens | 641c218 | 2011-04-07 09:54:43 -0400 | [diff] [blame] | 1545 | if (less_eq(msg_session(msg), l_ptr->peer_session)) |
| 1546 | break; /* duplicate or old reset: ignore */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1547 | } |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1548 | |
| 1549 | if (!msg_redundant_link(msg) && (link_working_working(l_ptr) || |
| 1550 | link_working_unknown(l_ptr))) { |
| 1551 | /* |
| 1552 | * peer has lost contact -- don't allow peer's links |
| 1553 | * to reactivate before we recognize loss & clean up |
| 1554 | */ |
Ying Xue | ca9cf06 | 2014-05-08 08:54:40 +0800 | [diff] [blame] | 1555 | l_ptr->owner->action_flags |= TIPC_WAIT_OWN_LINKS_DOWN; |
Allan Stephens | b4b5610 | 2011-05-27 11:00:51 -0400 | [diff] [blame] | 1556 | } |
| 1557 | |
Allan Stephens | 47361c8 | 2011-10-26 10:55:16 -0400 | [diff] [blame] | 1558 | link_state_event(l_ptr, RESET_MSG); |
| 1559 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1560 | /* fall thru' */ |
| 1561 | case ACTIVATE_MSG: |
| 1562 | /* Update link settings according other endpoint's values */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1563 | strcpy((strrchr(l_ptr->name, ':') + 1), (char *)msg_data(msg)); |
| 1564 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1565 | msg_tol = msg_link_tolerance(msg); |
| 1566 | if (msg_tol > l_ptr->tolerance) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1567 | link_set_supervision_props(l_ptr, msg_tol); |
| 1568 | |
| 1569 | if (msg_linkprio(msg) > l_ptr->priority) |
| 1570 | l_ptr->priority = msg_linkprio(msg); |
| 1571 | |
| 1572 | max_pkt_info = msg_max_pkt(msg); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1573 | if (max_pkt_info) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1574 | if (max_pkt_info < l_ptr->max_pkt_target) |
| 1575 | l_ptr->max_pkt_target = max_pkt_info; |
| 1576 | if (l_ptr->max_pkt > l_ptr->max_pkt_target) |
| 1577 | l_ptr->max_pkt = l_ptr->max_pkt_target; |
| 1578 | } else { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1579 | l_ptr->max_pkt = l_ptr->max_pkt_target; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1580 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1581 | |
Allan Stephens | 4d75313 | 2011-10-25 12:19:05 -0400 | [diff] [blame] | 1582 | /* Synchronize broadcast link info, if not done previously */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1583 | if (!tipc_node_is_up(l_ptr->owner)) { |
| 1584 | l_ptr->owner->bclink.last_sent = |
| 1585 | l_ptr->owner->bclink.last_in = |
| 1586 | msg_last_bcast(msg); |
| 1587 | l_ptr->owner->bclink.oos_state = 0; |
| 1588 | } |
Allan Stephens | 4d75313 | 2011-10-25 12:19:05 -0400 | [diff] [blame] | 1589 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1590 | l_ptr->peer_session = msg_session(msg); |
| 1591 | l_ptr->peer_bearer_id = msg_bearer_id(msg); |
Allan Stephens | 47361c8 | 2011-10-26 10:55:16 -0400 | [diff] [blame] | 1592 | |
| 1593 | if (msg_type(msg) == ACTIVATE_MSG) |
| 1594 | link_state_event(l_ptr, ACTIVATE_MSG); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1595 | break; |
| 1596 | case STATE_MSG: |
| 1597 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1598 | msg_tol = msg_link_tolerance(msg); |
| 1599 | if (msg_tol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1600 | link_set_supervision_props(l_ptr, msg_tol); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1601 | |
| 1602 | if (msg_linkprio(msg) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1603 | (msg_linkprio(msg) != l_ptr->priority)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1604 | pr_warn("%s<%s>, priority change %u->%u\n", |
| 1605 | link_rst_msg, l_ptr->name, l_ptr->priority, |
| 1606 | msg_linkprio(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1607 | l_ptr->priority = msg_linkprio(msg); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1608 | tipc_link_reset(l_ptr); /* Enforce change to take effect */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1609 | break; |
| 1610 | } |
Jon Paul Maloy | ec37dcd | 2014-05-14 05:39:10 -0400 | [diff] [blame] | 1611 | |
| 1612 | /* Record reception; force mismatch at next timeout: */ |
| 1613 | l_ptr->checkpoint--; |
| 1614 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1615 | link_state_event(l_ptr, TRAFFIC_MSG_EVT); |
| 1616 | l_ptr->stats.recv_states++; |
| 1617 | if (link_reset_unknown(l_ptr)) |
| 1618 | break; |
| 1619 | |
| 1620 | if (less_eq(mod(l_ptr->next_in_no), msg_next_sent(msg))) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1621 | rec_gap = mod(msg_next_sent(msg) - |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1622 | mod(l_ptr->next_in_no)); |
| 1623 | } |
| 1624 | |
| 1625 | max_pkt_ack = msg_max_pkt(msg); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1626 | if (max_pkt_ack > l_ptr->max_pkt) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1627 | l_ptr->max_pkt = max_pkt_ack; |
| 1628 | l_ptr->max_pkt_probes = 0; |
| 1629 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1630 | |
| 1631 | max_pkt_ack = 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1632 | if (msg_probe(msg)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1633 | l_ptr->stats.recv_probes++; |
Allan Stephens | a016892 | 2010-12-31 18:59:35 +0000 | [diff] [blame] | 1634 | if (msg_size(msg) > sizeof(l_ptr->proto_msg)) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1635 | max_pkt_ack = msg_size(msg); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1636 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1637 | |
| 1638 | /* Protocol message before retransmits, reduce loss risk */ |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 1639 | if (l_ptr->owner->bclink.recv_permitted) |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 1640 | tipc_bclink_update_link_state(l_ptr->owner, |
| 1641 | msg_last_bcast(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1642 | |
| 1643 | if (rec_gap || (msg_probe(msg))) { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1644 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, rec_gap, 0, |
| 1645 | 0, max_pkt_ack); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1646 | } |
| 1647 | if (msg_seq_gap(msg)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1648 | l_ptr->stats.recv_nacks++; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1649 | tipc_link_retransmit(l_ptr, l_ptr->first_out, |
| 1650 | msg_seq_gap(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1651 | } |
| 1652 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1653 | } |
| 1654 | exit: |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1655 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1656 | } |
| 1657 | |
| 1658 | |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1659 | /* tipc_link_tunnel_xmit(): Tunnel one packet via a link belonging to |
| 1660 | * a different bearer. Owner node is locked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1661 | */ |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1662 | static void tipc_link_tunnel_xmit(struct tipc_link *l_ptr, |
| 1663 | struct tipc_msg *tunnel_hdr, |
| 1664 | struct tipc_msg *msg, |
| 1665 | u32 selector) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1666 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1667 | struct tipc_link *tunnel; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1668 | struct sk_buff *buf; |
| 1669 | u32 length = msg_size(msg); |
| 1670 | |
| 1671 | tunnel = l_ptr->owner->active_links[selector & 1]; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1672 | if (!tipc_link_is_up(tunnel)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1673 | pr_warn("%stunnel link no longer available\n", link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1674 | return; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1675 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1676 | msg_set_size(tunnel_hdr, length + INT_H_SIZE); |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 1677 | buf = tipc_buf_acquire(length + INT_H_SIZE); |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1678 | if (!buf) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1679 | pr_warn("%sunable to send tunnel msg\n", link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1680 | return; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1681 | } |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 1682 | skb_copy_to_linear_data(buf, tunnel_hdr, INT_H_SIZE); |
| 1683 | skb_copy_to_linear_data_offset(buf, INT_H_SIZE, msg, length); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1684 | __tipc_link_xmit(tunnel, buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1685 | } |
| 1686 | |
| 1687 | |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1688 | /* tipc_link_failover_send_queue(): A link has gone down, but a second |
| 1689 | * link is still active. We can do failover. Tunnel the failing link's |
| 1690 | * whole send queue via the remaining link. This way, we don't lose |
| 1691 | * any packets, and sequence order is preserved for subsequent traffic |
| 1692 | * sent over the remaining link. Owner node is locked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1693 | */ |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1694 | void tipc_link_failover_send_queue(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1695 | { |
| 1696 | u32 msgcount = l_ptr->out_queue_size; |
| 1697 | struct sk_buff *crs = l_ptr->first_out; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1698 | struct tipc_link *tunnel = l_ptr->owner->active_links[0]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1699 | struct tipc_msg tunnel_hdr; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1700 | int split_bundles; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1701 | |
| 1702 | if (!tunnel) |
| 1703 | return; |
| 1704 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 1705 | tipc_msg_init(&tunnel_hdr, CHANGEOVER_PROTOCOL, |
Allan Stephens | 7571521 | 2008-06-04 17:37:34 -0700 | [diff] [blame] | 1706 | ORIGINAL_MSG, INT_H_SIZE, l_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1707 | msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id); |
| 1708 | msg_set_msgcnt(&tunnel_hdr, msgcount); |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 1709 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1710 | if (!l_ptr->first_out) { |
| 1711 | struct sk_buff *buf; |
| 1712 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 1713 | buf = tipc_buf_acquire(INT_H_SIZE); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1714 | if (buf) { |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 1715 | skb_copy_to_linear_data(buf, &tunnel_hdr, INT_H_SIZE); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1716 | msg_set_size(&tunnel_hdr, INT_H_SIZE); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1717 | __tipc_link_xmit(tunnel, buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1718 | } else { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1719 | pr_warn("%sunable to send changeover msg\n", |
| 1720 | link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1721 | } |
| 1722 | return; |
| 1723 | } |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 1724 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1725 | split_bundles = (l_ptr->owner->active_links[0] != |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 1726 | l_ptr->owner->active_links[1]); |
| 1727 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1728 | while (crs) { |
| 1729 | struct tipc_msg *msg = buf_msg(crs); |
| 1730 | |
| 1731 | if ((msg_user(msg) == MSG_BUNDLER) && split_bundles) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1732 | struct tipc_msg *m = msg_get_wrapped(msg); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1733 | unchar *pos = (unchar *)m; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1734 | |
Florian Westphal | d788d80 | 2007-08-02 19:28:06 -0700 | [diff] [blame] | 1735 | msgcount = msg_msgcnt(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1736 | while (msgcount--) { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1737 | msg_set_seqno(m, msg_seqno(msg)); |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1738 | tipc_link_tunnel_xmit(l_ptr, &tunnel_hdr, m, |
| 1739 | msg_link_selector(m)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1740 | pos += align(msg_size(m)); |
| 1741 | m = (struct tipc_msg *)pos; |
| 1742 | } |
| 1743 | } else { |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1744 | tipc_link_tunnel_xmit(l_ptr, &tunnel_hdr, msg, |
| 1745 | msg_link_selector(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1746 | } |
| 1747 | crs = crs->next; |
| 1748 | } |
| 1749 | } |
| 1750 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1751 | /* 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] | 1752 | * duplicate of the first link's send queue via the new link. This way, we |
| 1753 | * are guaranteed that currently queued packets from a socket are delivered |
| 1754 | * before future traffic from the same socket, even if this is using the |
| 1755 | * new link. The last arriving copy of each duplicate packet is dropped at |
| 1756 | * the receiving end by the regular protocol check, so packet cardinality |
| 1757 | * and sequence order is preserved per sender/receiver socket pair. |
| 1758 | * Owner node is locked. |
| 1759 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1760 | void tipc_link_dup_queue_xmit(struct tipc_link *l_ptr, |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1761 | struct tipc_link *tunnel) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1762 | { |
| 1763 | struct sk_buff *iter; |
| 1764 | struct tipc_msg tunnel_hdr; |
| 1765 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 1766 | tipc_msg_init(&tunnel_hdr, CHANGEOVER_PROTOCOL, |
Allan Stephens | 7571521 | 2008-06-04 17:37:34 -0700 | [diff] [blame] | 1767 | DUPLICATE_MSG, INT_H_SIZE, l_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1768 | msg_set_msgcnt(&tunnel_hdr, l_ptr->out_queue_size); |
| 1769 | msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id); |
| 1770 | iter = l_ptr->first_out; |
| 1771 | while (iter) { |
| 1772 | struct sk_buff *outbuf; |
| 1773 | struct tipc_msg *msg = buf_msg(iter); |
| 1774 | u32 length = msg_size(msg); |
| 1775 | |
| 1776 | if (msg_user(msg) == MSG_BUNDLER) |
| 1777 | msg_set_type(msg, CLOSED_MSG); |
| 1778 | msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); /* Update */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1779 | msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1780 | msg_set_size(&tunnel_hdr, length + INT_H_SIZE); |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 1781 | outbuf = tipc_buf_acquire(length + INT_H_SIZE); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1782 | if (outbuf == NULL) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1783 | pr_warn("%sunable to send duplicate msg\n", |
| 1784 | link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1785 | return; |
| 1786 | } |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 1787 | skb_copy_to_linear_data(outbuf, &tunnel_hdr, INT_H_SIZE); |
| 1788 | skb_copy_to_linear_data_offset(outbuf, INT_H_SIZE, iter->data, |
| 1789 | length); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1790 | __tipc_link_xmit(tunnel, outbuf); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1791 | if (!tipc_link_is_up(l_ptr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1792 | return; |
| 1793 | iter = iter->next; |
| 1794 | } |
| 1795 | } |
| 1796 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1797 | /** |
| 1798 | * buf_extract - extracts embedded TIPC message from another message |
| 1799 | * @skb: encapsulating message buffer |
| 1800 | * @from_pos: offset to extract from |
| 1801 | * |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1802 | * Returns a new message buffer containing an embedded message. The |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1803 | * encapsulating message itself is left unchanged. |
| 1804 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1805 | static struct sk_buff *buf_extract(struct sk_buff *skb, u32 from_pos) |
| 1806 | { |
| 1807 | struct tipc_msg *msg = (struct tipc_msg *)(skb->data + from_pos); |
| 1808 | u32 size = msg_size(msg); |
| 1809 | struct sk_buff *eb; |
| 1810 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 1811 | eb = tipc_buf_acquire(size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1812 | if (eb) |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 1813 | skb_copy_to_linear_data(eb, msg, size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1814 | return eb; |
| 1815 | } |
| 1816 | |
Jon Paul Maloy | 1dab3d5 | 2014-02-13 17:29:10 -0500 | [diff] [blame] | 1817 | |
| 1818 | |
| 1819 | /* tipc_link_dup_rcv(): Receive a tunnelled DUPLICATE_MSG packet. |
| 1820 | * Owner node is locked. |
| 1821 | */ |
| 1822 | static void tipc_link_dup_rcv(struct tipc_link *l_ptr, |
| 1823 | struct sk_buff *t_buf) |
| 1824 | { |
| 1825 | struct sk_buff *buf; |
| 1826 | |
| 1827 | if (!tipc_link_is_up(l_ptr)) |
| 1828 | return; |
| 1829 | |
| 1830 | buf = buf_extract(t_buf, INT_H_SIZE); |
| 1831 | if (buf == NULL) { |
| 1832 | pr_warn("%sfailed to extract inner dup pkt\n", link_co_err); |
| 1833 | return; |
| 1834 | } |
| 1835 | |
| 1836 | /* Add buffer to deferred queue, if applicable: */ |
| 1837 | link_handle_out_of_seq_msg(l_ptr, buf); |
| 1838 | } |
| 1839 | |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1840 | /* tipc_link_failover_rcv(): Receive a tunnelled ORIGINAL_MSG packet |
| 1841 | * Owner node is locked. |
| 1842 | */ |
| 1843 | static struct sk_buff *tipc_link_failover_rcv(struct tipc_link *l_ptr, |
| 1844 | struct sk_buff *t_buf) |
| 1845 | { |
| 1846 | struct tipc_msg *t_msg = buf_msg(t_buf); |
| 1847 | struct sk_buff *buf = NULL; |
| 1848 | struct tipc_msg *msg; |
| 1849 | |
| 1850 | if (tipc_link_is_up(l_ptr)) |
| 1851 | tipc_link_reset(l_ptr); |
| 1852 | |
| 1853 | /* First failover packet? */ |
| 1854 | if (l_ptr->exp_msg_count == START_CHANGEOVER) |
| 1855 | l_ptr->exp_msg_count = msg_msgcnt(t_msg); |
| 1856 | |
| 1857 | /* Should there be an inner packet? */ |
| 1858 | if (l_ptr->exp_msg_count) { |
| 1859 | l_ptr->exp_msg_count--; |
| 1860 | buf = buf_extract(t_buf, INT_H_SIZE); |
| 1861 | if (buf == NULL) { |
| 1862 | pr_warn("%sno inner failover pkt\n", link_co_err); |
| 1863 | goto exit; |
| 1864 | } |
| 1865 | msg = buf_msg(buf); |
| 1866 | |
| 1867 | if (less(msg_seqno(msg), l_ptr->reset_checkpoint)) { |
| 1868 | kfree_skb(buf); |
| 1869 | buf = NULL; |
| 1870 | goto exit; |
| 1871 | } |
| 1872 | if (msg_user(msg) == MSG_FRAGMENTER) { |
| 1873 | l_ptr->stats.recv_fragments++; |
Jon Paul Maloy | 37e2216 | 2014-05-14 05:39:12 -0400 | [diff] [blame] | 1874 | tipc_buf_append(&l_ptr->reasm_buf, &buf); |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1875 | } |
| 1876 | } |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1877 | exit: |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 1878 | if ((l_ptr->exp_msg_count == 0) && (l_ptr->flags & LINK_STOPPED)) { |
| 1879 | tipc_node_detach_link(l_ptr->owner, l_ptr); |
| 1880 | kfree(l_ptr); |
| 1881 | } |
Jon Paul Maloy | f006c9c | 2014-02-13 17:29:11 -0500 | [diff] [blame] | 1882 | return buf; |
| 1883 | } |
| 1884 | |
Jon Paul Maloy | 1dab3d5 | 2014-02-13 17:29:10 -0500 | [diff] [blame] | 1885 | /* tipc_link_tunnel_rcv(): Receive a tunnelled packet, sent |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1886 | * via other link as result of a failover (ORIGINAL_MSG) or |
| 1887 | * a new active link (DUPLICATE_MSG). Failover packets are |
| 1888 | * returned to the active link for delivery upwards. |
| 1889 | * Owner node is locked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1890 | */ |
Jon Paul Maloy | 3bb5338 | 2014-02-13 17:29:12 -0500 | [diff] [blame] | 1891 | static int tipc_link_tunnel_rcv(struct tipc_node *n_ptr, |
Jon Paul Maloy | 170b392 | 2014-01-07 17:02:41 -0500 | [diff] [blame] | 1892 | struct sk_buff **buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1893 | { |
Jon Paul Maloy | 02842f7 | 2014-02-13 17:29:14 -0500 | [diff] [blame] | 1894 | struct sk_buff *t_buf = *buf; |
| 1895 | struct tipc_link *l_ptr; |
| 1896 | struct tipc_msg *t_msg = buf_msg(t_buf); |
| 1897 | u32 bearer_id = msg_bearer_id(t_msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1898 | |
Jon Paul Maloy | 1e9d47a | 2014-02-13 17:29:13 -0500 | [diff] [blame] | 1899 | *buf = NULL; |
| 1900 | |
Dan Carpenter | cb4b102f | 2013-05-06 08:28:41 +0000 | [diff] [blame] | 1901 | if (bearer_id >= MAX_BEARERS) |
| 1902 | goto exit; |
Jon Paul Maloy | 1dab3d5 | 2014-02-13 17:29:10 -0500 | [diff] [blame] | 1903 | |
Jon Paul Maloy | 02842f7 | 2014-02-13 17:29:14 -0500 | [diff] [blame] | 1904 | l_ptr = n_ptr->links[bearer_id]; |
| 1905 | if (!l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1906 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1907 | |
Jon Paul Maloy | 02842f7 | 2014-02-13 17:29:14 -0500 | [diff] [blame] | 1908 | if (msg_type(t_msg) == DUPLICATE_MSG) |
| 1909 | tipc_link_dup_rcv(l_ptr, t_buf); |
| 1910 | else if (msg_type(t_msg) == ORIGINAL_MSG) |
| 1911 | *buf = tipc_link_failover_rcv(l_ptr, t_buf); |
Jon Paul Maloy | 1e9d47a | 2014-02-13 17:29:13 -0500 | [diff] [blame] | 1912 | else |
| 1913 | pr_warn("%sunknown tunnel pkt received\n", link_co_err); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1914 | exit: |
Jon Paul Maloy | 02842f7 | 2014-02-13 17:29:14 -0500 | [diff] [blame] | 1915 | kfree_skb(t_buf); |
Jon Paul Maloy | 1e9d47a | 2014-02-13 17:29:13 -0500 | [diff] [blame] | 1916 | return *buf != NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1917 | } |
| 1918 | |
| 1919 | /* |
| 1920 | * Bundler functionality: |
| 1921 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1922 | void tipc_link_bundle_rcv(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1923 | { |
| 1924 | u32 msgcount = msg_msgcnt(buf_msg(buf)); |
| 1925 | u32 pos = INT_H_SIZE; |
| 1926 | struct sk_buff *obuf; |
Jon Paul Maloy | ec8a2e5 | 2014-06-25 20:41:40 -0500 | [diff] [blame] | 1927 | struct tipc_msg *omsg; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1928 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1929 | while (msgcount--) { |
| 1930 | obuf = buf_extract(buf, pos); |
| 1931 | if (obuf == NULL) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 1932 | pr_warn("Link unable to unbundle message(s)\n"); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 1933 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1934 | } |
Jon Paul Maloy | ec8a2e5 | 2014-06-25 20:41:40 -0500 | [diff] [blame] | 1935 | omsg = buf_msg(obuf); |
| 1936 | pos += align(msg_size(omsg)); |
Jon Paul Maloy | 643566d | 2014-10-17 15:25:28 -0400 | [diff] [blame] | 1937 | if (msg_isdata(omsg)) { |
| 1938 | if (unlikely(msg_type(omsg) == TIPC_MCAST_MSG)) |
| 1939 | tipc_sk_mcast_rcv(obuf); |
| 1940 | else |
| 1941 | tipc_sk_rcv(obuf); |
| 1942 | } else if (msg_user(omsg) == CONN_MANAGER) { |
Jon Paul Maloy | ec8a2e5 | 2014-06-25 20:41:40 -0500 | [diff] [blame] | 1943 | tipc_sk_rcv(obuf); |
| 1944 | } else if (msg_user(omsg) == NAME_DISTRIBUTOR) { |
| 1945 | tipc_named_rcv(obuf); |
| 1946 | } else { |
| 1947 | pr_warn("Illegal bundled msg: %u\n", msg_user(omsg)); |
| 1948 | kfree_skb(obuf); |
| 1949 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1950 | } |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1951 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1952 | } |
| 1953 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1954 | static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tolerance) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1955 | { |
Allan Stephens | 5413b4c | 2011-01-18 13:24:55 -0500 | [diff] [blame] | 1956 | if ((tolerance < TIPC_MIN_LINK_TOL) || (tolerance > TIPC_MAX_LINK_TOL)) |
| 1957 | return; |
| 1958 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1959 | l_ptr->tolerance = tolerance; |
| 1960 | l_ptr->continuity_interval = |
| 1961 | ((tolerance / 4) > 500) ? 500 : tolerance / 4; |
| 1962 | l_ptr->abort_limit = tolerance / (l_ptr->continuity_interval / 4); |
| 1963 | } |
| 1964 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1965 | void tipc_link_set_queue_limits(struct tipc_link *l_ptr, u32 window) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1966 | { |
| 1967 | /* Data messages from this node, inclusive FIRST_FRAGM */ |
Allan Stephens | 06d82c9 | 2008-03-06 15:06:55 -0800 | [diff] [blame] | 1968 | l_ptr->queue_limit[TIPC_LOW_IMPORTANCE] = window; |
| 1969 | l_ptr->queue_limit[TIPC_MEDIUM_IMPORTANCE] = (window / 3) * 4; |
| 1970 | l_ptr->queue_limit[TIPC_HIGH_IMPORTANCE] = (window / 3) * 5; |
| 1971 | l_ptr->queue_limit[TIPC_CRITICAL_IMPORTANCE] = (window / 3) * 6; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1972 | /* Transiting data messages,inclusive FIRST_FRAGM */ |
Allan Stephens | 06d82c9 | 2008-03-06 15:06:55 -0800 | [diff] [blame] | 1973 | l_ptr->queue_limit[TIPC_LOW_IMPORTANCE + 4] = 300; |
| 1974 | l_ptr->queue_limit[TIPC_MEDIUM_IMPORTANCE + 4] = 600; |
| 1975 | l_ptr->queue_limit[TIPC_HIGH_IMPORTANCE + 4] = 900; |
| 1976 | l_ptr->queue_limit[TIPC_CRITICAL_IMPORTANCE + 4] = 1200; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1977 | l_ptr->queue_limit[CONN_MANAGER] = 1200; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1978 | l_ptr->queue_limit[CHANGEOVER_PROTOCOL] = 2500; |
| 1979 | l_ptr->queue_limit[NAME_DISTRIBUTOR] = 3000; |
| 1980 | /* FRAGMENT and LAST_FRAGMENT packets */ |
| 1981 | l_ptr->queue_limit[MSG_FRAGMENTER] = 4000; |
| 1982 | } |
| 1983 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1984 | /* tipc_link_find_owner - locate owner node of link by link's name |
| 1985 | * @name: pointer to link name string |
| 1986 | * @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] | 1987 | * |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1988 | * 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] | 1989 | */ |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1990 | static struct tipc_node *tipc_link_find_owner(const char *link_name, |
| 1991 | unsigned int *bearer_id) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1992 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 1993 | struct tipc_link *l_ptr; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1994 | struct tipc_node *n_ptr; |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1995 | struct tipc_node *found_node = 0; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 1996 | int i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1997 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 1998 | *bearer_id = 0; |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 1999 | rcu_read_lock(); |
| 2000 | list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) { |
Jon Paul Maloy | a11607f | 2014-02-14 16:40:44 -0500 | [diff] [blame] | 2001 | tipc_node_lock(n_ptr); |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 2002 | for (i = 0; i < MAX_BEARERS; i++) { |
| 2003 | l_ptr = n_ptr->links[i]; |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2004 | if (l_ptr && !strcmp(l_ptr->name, link_name)) { |
| 2005 | *bearer_id = i; |
| 2006 | found_node = n_ptr; |
| 2007 | break; |
| 2008 | } |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 2009 | } |
Jon Paul Maloy | a11607f | 2014-02-14 16:40:44 -0500 | [diff] [blame] | 2010 | tipc_node_unlock(n_ptr); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2011 | if (found_node) |
| 2012 | break; |
Erik Hugne | bbfbe47 | 2013-10-18 07:23:21 +0200 | [diff] [blame] | 2013 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 2014 | rcu_read_unlock(); |
| 2015 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2016 | return found_node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2017 | } |
| 2018 | |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2019 | /** |
| 2020 | * link_value_is_valid -- validate proposed link tolerance/priority/window |
| 2021 | * |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 2022 | * @cmd: value type (TIPC_CMD_SET_LINK_*) |
| 2023 | * @new_value: the new value |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2024 | * |
| 2025 | * Returns 1 if value is within range, 0 if not. |
| 2026 | */ |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2027 | static int link_value_is_valid(u16 cmd, u32 new_value) |
| 2028 | { |
| 2029 | switch (cmd) { |
| 2030 | case TIPC_CMD_SET_LINK_TOL: |
| 2031 | return (new_value >= TIPC_MIN_LINK_TOL) && |
| 2032 | (new_value <= TIPC_MAX_LINK_TOL); |
| 2033 | case TIPC_CMD_SET_LINK_PRI: |
| 2034 | return (new_value <= TIPC_MAX_LINK_PRI); |
| 2035 | case TIPC_CMD_SET_LINK_WINDOW: |
| 2036 | return (new_value >= TIPC_MIN_LINK_WIN) && |
| 2037 | (new_value <= TIPC_MAX_LINK_WIN); |
| 2038 | } |
| 2039 | return 0; |
| 2040 | } |
| 2041 | |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2042 | /** |
| 2043 | * link_cmd_set_value - change priority/tolerance/window for link/bearer/media |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 2044 | * @name: ptr to link, bearer, or media name |
| 2045 | * @new_value: new value of link, bearer, or media setting |
| 2046 | * @cmd: which link, bearer, or media attribute to set (TIPC_CMD_SET_LINK_*) |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2047 | * |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 2048 | * Caller must hold RTNL lock to ensure link/bearer/media is not deleted. |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2049 | * |
| 2050 | * Returns 0 if value updated and negative value on error. |
| 2051 | */ |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2052 | static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) |
| 2053 | { |
| 2054 | struct tipc_node *node; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 2055 | struct tipc_link *l_ptr; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2056 | struct tipc_bearer *b_ptr; |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 2057 | struct tipc_media *m_ptr; |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2058 | int bearer_id; |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2059 | int res = 0; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2060 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2061 | node = tipc_link_find_owner(name, &bearer_id); |
| 2062 | if (node) { |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2063 | tipc_node_lock(node); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2064 | l_ptr = node->links[bearer_id]; |
| 2065 | |
| 2066 | if (l_ptr) { |
| 2067 | switch (cmd) { |
| 2068 | case TIPC_CMD_SET_LINK_TOL: |
| 2069 | link_set_supervision_props(l_ptr, new_value); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2070 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, |
| 2071 | new_value, 0, 0); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2072 | break; |
| 2073 | case TIPC_CMD_SET_LINK_PRI: |
| 2074 | l_ptr->priority = new_value; |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2075 | tipc_link_proto_xmit(l_ptr, STATE_MSG, 0, 0, |
| 2076 | 0, new_value, 0); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2077 | break; |
| 2078 | case TIPC_CMD_SET_LINK_WINDOW: |
| 2079 | tipc_link_set_queue_limits(l_ptr, new_value); |
| 2080 | break; |
| 2081 | default: |
| 2082 | res = -EINVAL; |
| 2083 | break; |
| 2084 | } |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2085 | } |
| 2086 | tipc_node_unlock(node); |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2087 | return res; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2088 | } |
| 2089 | |
| 2090 | b_ptr = tipc_bearer_find(name); |
| 2091 | if (b_ptr) { |
| 2092 | switch (cmd) { |
| 2093 | case TIPC_CMD_SET_LINK_TOL: |
| 2094 | b_ptr->tolerance = new_value; |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2095 | break; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2096 | case TIPC_CMD_SET_LINK_PRI: |
| 2097 | b_ptr->priority = new_value; |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2098 | break; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2099 | case TIPC_CMD_SET_LINK_WINDOW: |
| 2100 | b_ptr->window = new_value; |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2101 | break; |
| 2102 | default: |
| 2103 | res = -EINVAL; |
| 2104 | break; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2105 | } |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2106 | return res; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2107 | } |
| 2108 | |
| 2109 | m_ptr = tipc_media_find(name); |
| 2110 | if (!m_ptr) |
| 2111 | return -ENODEV; |
| 2112 | switch (cmd) { |
| 2113 | case TIPC_CMD_SET_LINK_TOL: |
| 2114 | m_ptr->tolerance = new_value; |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2115 | break; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2116 | case TIPC_CMD_SET_LINK_PRI: |
| 2117 | m_ptr->priority = new_value; |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2118 | break; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2119 | case TIPC_CMD_SET_LINK_WINDOW: |
| 2120 | m_ptr->window = new_value; |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2121 | break; |
| 2122 | default: |
| 2123 | res = -EINVAL; |
| 2124 | break; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2125 | } |
Ying Xue | 636c037 | 2013-10-18 07:23:20 +0200 | [diff] [blame] | 2126 | return res; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2127 | } |
| 2128 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2129 | struct sk_buff *tipc_link_cmd_config(const void *req_tlv_area, int req_tlv_space, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2130 | u16 cmd) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2131 | { |
| 2132 | struct tipc_link_config *args; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2133 | u32 new_value; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2134 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2135 | |
| 2136 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_LINK_CONFIG)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2137 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2138 | |
| 2139 | args = (struct tipc_link_config *)TLV_DATA(req_tlv_area); |
| 2140 | new_value = ntohl(args->value); |
| 2141 | |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2142 | if (!link_value_is_valid(cmd, new_value)) |
| 2143 | return tipc_cfg_reply_error_string( |
| 2144 | "cannot change, value invalid"); |
| 2145 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2146 | if (!strcmp(args->name, tipc_bclink_name)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2147 | if ((cmd == TIPC_CMD_SET_LINK_WINDOW) && |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2148 | (tipc_bclink_set_queue_limits(new_value) == 0)) |
| 2149 | return tipc_cfg_reply_none(); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2150 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2151 | " (cannot change setting on broadcast link)"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2152 | } |
| 2153 | |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 2154 | res = link_cmd_set_value(args->name, new_value, cmd); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2155 | if (res) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2156 | return tipc_cfg_reply_error_string("cannot change link setting"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2157 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2158 | return tipc_cfg_reply_none(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2159 | } |
| 2160 | |
| 2161 | /** |
| 2162 | * link_reset_statistics - reset link statistics |
| 2163 | * @l_ptr: pointer to link |
| 2164 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 2165 | static void link_reset_statistics(struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2166 | { |
| 2167 | memset(&l_ptr->stats, 0, sizeof(l_ptr->stats)); |
| 2168 | l_ptr->stats.sent_info = l_ptr->next_out_no; |
| 2169 | l_ptr->stats.recv_info = l_ptr->next_in_no; |
| 2170 | } |
| 2171 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2172 | struct sk_buff *tipc_link_cmd_reset_stats(const void *req_tlv_area, int req_tlv_space) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2173 | { |
| 2174 | char *link_name; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 2175 | struct tipc_link *l_ptr; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 2176 | struct tipc_node *node; |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2177 | unsigned int bearer_id; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2178 | |
| 2179 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_LINK_NAME)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2180 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2181 | |
| 2182 | link_name = (char *)TLV_DATA(req_tlv_area); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2183 | if (!strcmp(link_name, tipc_bclink_name)) { |
| 2184 | if (tipc_bclink_reset_stats()) |
| 2185 | return tipc_cfg_reply_error_string("link not found"); |
| 2186 | return tipc_cfg_reply_none(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2187 | } |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2188 | node = tipc_link_find_owner(link_name, &bearer_id); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 2189 | if (!node) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2190 | return tipc_cfg_reply_error_string("link not found"); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 2191 | |
Jon Paul Maloy | a11607f | 2014-02-14 16:40:44 -0500 | [diff] [blame] | 2192 | tipc_node_lock(node); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2193 | l_ptr = node->links[bearer_id]; |
| 2194 | if (!l_ptr) { |
| 2195 | tipc_node_unlock(node); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2196 | return tipc_cfg_reply_error_string("link not found"); |
| 2197 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2198 | link_reset_statistics(l_ptr); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2199 | tipc_node_unlock(node); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2200 | return tipc_cfg_reply_none(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2201 | } |
| 2202 | |
| 2203 | /** |
| 2204 | * percent - convert count to a percentage of total (rounding up or down) |
| 2205 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2206 | static u32 percent(u32 count, u32 total) |
| 2207 | { |
| 2208 | return (count * 100 + (total / 2)) / total; |
| 2209 | } |
| 2210 | |
| 2211 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2212 | * tipc_link_stats - print link statistics |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2213 | * @name: link name |
| 2214 | * @buf: print buffer area |
| 2215 | * @buf_size: size of print buffer area |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2216 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2217 | * Returns length of print buffer data string (or 0 if error) |
| 2218 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2219 | static int tipc_link_stats(const char *name, char *buf, const u32 buf_size) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2220 | { |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2221 | struct tipc_link *l; |
| 2222 | struct tipc_stats *s; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 2223 | struct tipc_node *node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2224 | char *status; |
| 2225 | u32 profile_total = 0; |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2226 | unsigned int bearer_id; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2227 | int ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2228 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2229 | if (!strcmp(name, tipc_bclink_name)) |
| 2230 | return tipc_bclink_stats(buf, buf_size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2231 | |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2232 | node = tipc_link_find_owner(name, &bearer_id); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 2233 | if (!node) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2234 | return 0; |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 2235 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2236 | tipc_node_lock(node); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2237 | |
| 2238 | l = node->links[bearer_id]; |
| 2239 | if (!l) { |
| 2240 | tipc_node_unlock(node); |
Jon Paul Maloy | e099e86 | 2014-02-13 17:29:18 -0500 | [diff] [blame] | 2241 | return 0; |
| 2242 | } |
| 2243 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2244 | s = &l->stats; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2245 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2246 | if (tipc_link_is_active(l)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2247 | status = "ACTIVE"; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2248 | else if (tipc_link_is_up(l)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2249 | status = "STANDBY"; |
| 2250 | else |
| 2251 | status = "DEFUNCT"; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2252 | |
| 2253 | ret = tipc_snprintf(buf, buf_size, "Link <%s>\n" |
| 2254 | " %s MTU:%u Priority:%u Tolerance:%u ms" |
| 2255 | " Window:%u packets\n", |
| 2256 | l->name, status, l->max_pkt, l->priority, |
| 2257 | l->tolerance, l->queue_limit[0]); |
| 2258 | |
| 2259 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 2260 | " RX packets:%u fragments:%u/%u bundles:%u/%u\n", |
| 2261 | l->next_in_no - s->recv_info, s->recv_fragments, |
| 2262 | s->recv_fragmented, s->recv_bundles, |
| 2263 | s->recv_bundled); |
| 2264 | |
| 2265 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 2266 | " TX packets:%u fragments:%u/%u bundles:%u/%u\n", |
| 2267 | l->next_out_no - s->sent_info, s->sent_fragments, |
| 2268 | s->sent_fragmented, s->sent_bundles, |
| 2269 | s->sent_bundled); |
| 2270 | |
| 2271 | profile_total = s->msg_length_counts; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2272 | if (!profile_total) |
| 2273 | profile_total = 1; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2274 | |
| 2275 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 2276 | " TX profile sample:%u packets average:%u octets\n" |
| 2277 | " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% " |
| 2278 | "-16384:%u%% -32768:%u%% -66000:%u%%\n", |
| 2279 | s->msg_length_counts, |
| 2280 | s->msg_lengths_total / profile_total, |
| 2281 | percent(s->msg_length_profile[0], profile_total), |
| 2282 | percent(s->msg_length_profile[1], profile_total), |
| 2283 | percent(s->msg_length_profile[2], profile_total), |
| 2284 | percent(s->msg_length_profile[3], profile_total), |
| 2285 | percent(s->msg_length_profile[4], profile_total), |
| 2286 | percent(s->msg_length_profile[5], profile_total), |
| 2287 | percent(s->msg_length_profile[6], profile_total)); |
| 2288 | |
| 2289 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 2290 | " RX states:%u probes:%u naks:%u defs:%u" |
| 2291 | " dups:%u\n", s->recv_states, s->recv_probes, |
| 2292 | s->recv_nacks, s->deferred_recv, s->duplicates); |
| 2293 | |
| 2294 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
| 2295 | " TX states:%u probes:%u naks:%u acks:%u" |
| 2296 | " dups:%u\n", s->sent_states, s->sent_probes, |
| 2297 | s->sent_nacks, s->sent_acks, s->retransmitted); |
| 2298 | |
| 2299 | ret += tipc_snprintf(buf + ret, buf_size - ret, |
Ying Xue | 3c294cb | 2012-11-15 11:34:45 +0800 | [diff] [blame] | 2300 | " Congestion link:%u Send queue" |
| 2301 | " max:%u avg:%u\n", s->link_congs, |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2302 | s->max_queue_sz, s->queue_sz_counts ? |
| 2303 | (s->accu_queue_sz / s->queue_sz_counts) : 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2304 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2305 | tipc_node_unlock(node); |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2306 | return ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2307 | } |
| 2308 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2309 | struct sk_buff *tipc_link_cmd_show_stats(const void *req_tlv_area, int req_tlv_space) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2310 | { |
| 2311 | struct sk_buff *buf; |
| 2312 | struct tlv_desc *rep_tlv; |
| 2313 | int str_len; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2314 | int pb_len; |
| 2315 | char *pb; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2316 | |
| 2317 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_LINK_NAME)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2318 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2319 | |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2320 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2321 | if (!buf) |
| 2322 | return NULL; |
| 2323 | |
| 2324 | rep_tlv = (struct tlv_desc *)buf->data; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2325 | pb = TLV_DATA(rep_tlv); |
| 2326 | pb_len = ULTRA_STRING_MAX_LEN; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2327 | str_len = tipc_link_stats((char *)TLV_DATA(req_tlv_area), |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2328 | pb, pb_len); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2329 | if (!str_len) { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 2330 | kfree_skb(buf); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2331 | return tipc_cfg_reply_error_string("link not found"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2332 | } |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 2333 | str_len += 1; /* for "\0" */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2334 | skb_put(buf, TLV_SPACE(str_len)); |
| 2335 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); |
| 2336 | |
| 2337 | return buf; |
| 2338 | } |
| 2339 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2340 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2341 | * tipc_link_get_max_pkt - get maximum packet size to use when sending to destination |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2342 | * @dest: network address of destination node |
| 2343 | * @selector: used to select from set of active links |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2344 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2345 | * If no active link can be found, uses default maximum packet size. |
| 2346 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2347 | u32 tipc_link_get_max_pkt(u32 dest, u32 selector) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2348 | { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 2349 | struct tipc_node *n_ptr; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 2350 | struct tipc_link *l_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2351 | u32 res = MAX_PKT_DEFAULT; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2352 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2353 | if (dest == tipc_own_addr) |
| 2354 | return MAX_MSG_SIZE; |
| 2355 | |
Allan Stephens | 51a8e4d | 2010-12-31 18:59:18 +0000 | [diff] [blame] | 2356 | n_ptr = tipc_node_find(dest); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2357 | if (n_ptr) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2358 | tipc_node_lock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2359 | l_ptr = n_ptr->active_links[selector & 1]; |
| 2360 | if (l_ptr) |
Allan Stephens | 15e979d | 2010-05-11 14:30:10 +0000 | [diff] [blame] | 2361 | res = l_ptr->max_pkt; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2362 | tipc_node_unlock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2363 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2364 | return res; |
| 2365 | } |
| 2366 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 2367 | static void link_print(struct tipc_link *l_ptr, const char *str) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2368 | { |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 2369 | struct tipc_bearer *b_ptr; |
| 2370 | |
| 2371 | rcu_read_lock(); |
| 2372 | b_ptr = rcu_dereference_rtnl(bearer_list[l_ptr->bearer_id]); |
| 2373 | if (b_ptr) |
| 2374 | pr_info("%s Link %x<%s>:", str, l_ptr->addr, b_ptr->name); |
| 2375 | rcu_read_unlock(); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 2376 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2377 | if (link_working_unknown(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 2378 | pr_cont(":WU\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 2379 | else if (link_reset_reset(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 2380 | pr_cont(":RR\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 2381 | else if (link_reset_unknown(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 2382 | pr_cont(":RU\n"); |
Allan Stephens | 8d64a5b | 2010-12-31 18:59:27 +0000 | [diff] [blame] | 2383 | else if (link_working_working(l_ptr)) |
Paul Gortmaker | 5deedde | 2012-07-11 19:27:56 -0400 | [diff] [blame] | 2384 | pr_cont(":WW\n"); |
| 2385 | else |
| 2386 | pr_cont("\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2387 | } |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame^] | 2388 | |
| 2389 | /* Parse and validate nested (link) properties valid for media, bearer and link |
| 2390 | */ |
| 2391 | int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]) |
| 2392 | { |
| 2393 | int err; |
| 2394 | |
| 2395 | err = nla_parse_nested(props, TIPC_NLA_PROP_MAX, prop, |
| 2396 | tipc_nl_prop_policy); |
| 2397 | if (err) |
| 2398 | return err; |
| 2399 | |
| 2400 | if (props[TIPC_NLA_PROP_PRIO]) { |
| 2401 | u32 prio; |
| 2402 | |
| 2403 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); |
| 2404 | if (prio > TIPC_MAX_LINK_PRI) |
| 2405 | return -EINVAL; |
| 2406 | } |
| 2407 | |
| 2408 | if (props[TIPC_NLA_PROP_TOL]) { |
| 2409 | u32 tol; |
| 2410 | |
| 2411 | tol = nla_get_u32(props[TIPC_NLA_PROP_TOL]); |
| 2412 | if ((tol < TIPC_MIN_LINK_TOL) || (tol > TIPC_MAX_LINK_TOL)) |
| 2413 | return -EINVAL; |
| 2414 | } |
| 2415 | |
| 2416 | if (props[TIPC_NLA_PROP_WIN]) { |
| 2417 | u32 win; |
| 2418 | |
| 2419 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
| 2420 | if ((win < TIPC_MIN_LINK_WIN) || (win > TIPC_MAX_LINK_WIN)) |
| 2421 | return -EINVAL; |
| 2422 | } |
| 2423 | |
| 2424 | return 0; |
| 2425 | } |