1 // SPDX-License-Identifier: GPL-2.0 2 #include <generated/utsrelease.h> 3 #include <linux/proc_fs.h> 4 #include <linux/ethtool.h> 5 #include <linux/export.h> 6 #include <net/net_namespace.h> 7 #include <net/netns/generic.h> 8 #include <net/bonding.h> 9 10 #define bond_version "Ethernet Channel Bonding Driver: v" UTS_RELEASE "\n" 11 12 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) 13 __acquires(RCU) 14 { 15 struct bonding *bond = pde_data(file_inode(seq->file)); 16 struct list_head *iter; 17 struct slave *slave; 18 loff_t off = 0; 19 20 rcu_read_lock(); 21 22 if (*pos == 0) 23 return SEQ_START_TOKEN; 24 25 bond_for_each_slave_rcu(bond, slave, iter) 26 if (++off == *pos) 27 return slave; 28 29 return NULL; 30 } 31 32 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) 33 { 34 struct bonding *bond = pde_data(file_inode(seq->file)); 35 struct list_head *iter; 36 struct slave *slave; 37 bool found = false; 38 39 ++*pos; 40 if (v == SEQ_START_TOKEN) 41 return bond_first_slave_rcu(bond); 42 43 bond_for_each_slave_rcu(bond, slave, iter) { 44 if (found) 45 return slave; 46 if (slave == v) 47 found = true; 48 } 49 50 return NULL; 51 } 52 53 static void bond_info_seq_stop(struct seq_file *seq, void *v) 54 __releases(RCU) 55 { 56 rcu_read_unlock(); 57 } 58 59 static void bond_info_show_master(struct seq_file *seq) 60 { 61 struct bonding *bond = pde_data(file_inode(seq->file)); 62 const struct bond_opt_value *optval; 63 struct slave *curr, *primary; 64 int i; 65 66 curr = rcu_dereference(bond->curr_active_slave); 67 68 seq_printf(seq, "Bonding Mode: %s", 69 bond_mode_name(BOND_MODE(bond))); 70 71 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && 72 bond->params.fail_over_mac) { 73 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC, 74 bond->params.fail_over_mac); 75 seq_printf(seq, " (fail_over_mac %s)", optval->string); 76 } 77 78 seq_printf(seq, "\n"); 79 80 if (bond_mode_uses_xmit_hash(bond)) { 81 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH, 82 bond->params.xmit_policy); 83 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", 84 optval->string, bond->params.xmit_policy); 85 } 86 87 if (bond_uses_primary(bond)) { 88 primary = rcu_dereference(bond->primary_slave); 89 seq_printf(seq, "Primary Slave: %s", 90 primary ? primary->dev->name : "None"); 91 if (primary) { 92 optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT, 93 bond->params.primary_reselect); 94 seq_printf(seq, " (primary_reselect %s)", 95 optval->string); 96 } 97 98 seq_printf(seq, "\nCurrently Active Slave: %s\n", 99 (curr) ? curr->dev->name : "None"); 100 } 101 102 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? 103 "up" : "down"); 104 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); 105 seq_printf(seq, "Up Delay (ms): %d\n", 106 bond->params.updelay * bond->params.miimon); 107 seq_printf(seq, "Down Delay (ms): %d\n", 108 bond->params.downdelay * bond->params.miimon); 109 seq_printf(seq, "Peer Notification Delay (ms): %d\n", 110 bond->params.peer_notif_delay * bond->params.miimon); 111 112 113 /* ARP information */ 114 if (bond->params.arp_interval > 0) { 115 int printed = 0; 116 117 seq_printf(seq, "ARP Polling Interval (ms): %d\n", 118 bond->params.arp_interval); 119 seq_printf(seq, "ARP Missed Max: %u\n", 120 bond->params.missed_max); 121 122 seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); 123 124 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { 125 if (!bond->params.arp_targets[i]) 126 break; 127 if (printed) 128 seq_printf(seq, ","); 129 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); 130 printed = 1; 131 } 132 seq_printf(seq, "\n"); 133 134 #if IS_ENABLED(CONFIG_IPV6) 135 printed = 0; 136 seq_printf(seq, "NS IPv6 target/s (xx::xx form):"); 137 138 for (i = 0; (i < BOND_MAX_NS_TARGETS); i++) { 139 if (ipv6_addr_any(&bond->params.ns_targets[i])) 140 break; 141 if (printed) 142 seq_printf(seq, ","); 143 seq_printf(seq, " %pI6c", &bond->params.ns_targets[i]); 144 printed = 1; 145 } 146 seq_printf(seq, "\n"); 147 #endif 148 } 149 150 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 151 struct ad_info ad_info; 152 153 seq_puts(seq, "\n802.3ad info\n"); 154 seq_printf(seq, "LACP active: %s\n", 155 (bond->params.lacp_active) ? "on" : "off"); 156 seq_printf(seq, "LACP rate: %s\n", 157 (bond->params.lacp_fast) ? "fast" : "slow"); 158 seq_printf(seq, "Min links: %d\n", bond->params.min_links); 159 optval = bond_opt_get_val(BOND_OPT_AD_SELECT, 160 bond->params.ad_select); 161 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", 162 optval->string); 163 if (capable(CAP_NET_ADMIN)) { 164 seq_printf(seq, "System priority: %d\n", 165 BOND_AD_INFO(bond).system.sys_priority); 166 seq_printf(seq, "System MAC address: %pM\n", 167 &BOND_AD_INFO(bond).system.sys_mac_addr); 168 169 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { 170 seq_printf(seq, 171 "bond %s has no active aggregator\n", 172 bond->dev->name); 173 } else { 174 seq_printf(seq, "Active Aggregator Info:\n"); 175 176 seq_printf(seq, "\tAggregator ID: %d\n", 177 ad_info.aggregator_id); 178 seq_printf(seq, "\tNumber of ports: %d\n", 179 ad_info.ports); 180 seq_printf(seq, "\tActor Key: %d\n", 181 ad_info.actor_key); 182 seq_printf(seq, "\tPartner Key: %d\n", 183 ad_info.partner_key); 184 seq_printf(seq, "\tPartner Mac Address: %pM\n", 185 ad_info.partner_system); 186 } 187 } 188 } 189 } 190 191 /* Note: runs under rcu_read_lock() */ 192 static void bond_info_show_slave(struct seq_file *seq, 193 const struct slave *slave) 194 { 195 struct bonding *bond = pde_data(file_inode(seq->file)); 196 197 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); 198 seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link)); 199 if (slave->speed == SPEED_UNKNOWN) 200 seq_printf(seq, "Speed: %s\n", "Unknown"); 201 else 202 seq_printf(seq, "Speed: %d Mbps\n", slave->speed); 203 204 if (slave->duplex == DUPLEX_UNKNOWN) 205 seq_printf(seq, "Duplex: %s\n", "Unknown"); 206 else 207 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half"); 208 209 seq_printf(seq, "Link Failure Count: %u\n", 210 slave->link_failure_count); 211 212 seq_printf(seq, "Permanent HW addr: %*phC\n", 213 slave->dev->addr_len, slave->perm_hwaddr); 214 seq_printf(seq, "Slave queue ID: %d\n", READ_ONCE(slave->queue_id)); 215 216 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 217 const struct port *port = &SLAVE_AD_INFO(slave)->port; 218 const struct aggregator *agg = rcu_dereference(port->aggregator); 219 220 if (agg) { 221 seq_printf(seq, "Aggregator ID: %d\n", 222 agg->aggregator_identifier); 223 seq_printf(seq, "Actor Churn State: %s\n", 224 bond_3ad_churn_desc(port->sm_churn_actor_state)); 225 seq_printf(seq, "Partner Churn State: %s\n", 226 bond_3ad_churn_desc(port->sm_churn_partner_state)); 227 seq_printf(seq, "Actor Churned Count: %d\n", 228 port->churn_actor_count); 229 seq_printf(seq, "Partner Churned Count: %d\n", 230 port->churn_partner_count); 231 232 if (capable(CAP_NET_ADMIN)) { 233 seq_puts(seq, "details actor lacp pdu:\n"); 234 seq_printf(seq, " system priority: %d\n", 235 port->actor_system_priority); 236 seq_printf(seq, " system mac address: %pM\n", 237 &port->actor_system); 238 seq_printf(seq, " port key: %d\n", 239 port->actor_oper_port_key); 240 seq_printf(seq, " port priority: %d\n", 241 port->actor_port_priority); 242 seq_printf(seq, " port number: %d\n", 243 port->actor_port_number); 244 seq_printf(seq, " port state: %d\n", 245 port->actor_oper_port_state); 246 247 seq_puts(seq, "details partner lacp pdu:\n"); 248 seq_printf(seq, " system priority: %d\n", 249 port->partner_oper.system_priority); 250 seq_printf(seq, " system mac address: %pM\n", 251 &port->partner_oper.system); 252 seq_printf(seq, " oper key: %d\n", 253 port->partner_oper.key); 254 seq_printf(seq, " port priority: %d\n", 255 port->partner_oper.port_priority); 256 seq_printf(seq, " port number: %d\n", 257 port->partner_oper.port_number); 258 seq_printf(seq, " port state: %d\n", 259 port->partner_oper.port_state); 260 } 261 } else { 262 seq_puts(seq, "Aggregator ID: N/A\n"); 263 } 264 } 265 } 266 267 static int bond_info_seq_show(struct seq_file *seq, void *v) 268 { 269 if (v == SEQ_START_TOKEN) { 270 seq_printf(seq, "%s\n", bond_version); 271 bond_info_show_master(seq); 272 } else 273 bond_info_show_slave(seq, v); 274 275 return 0; 276 } 277 278 static const struct seq_operations bond_info_seq_ops = { 279 .start = bond_info_seq_start, 280 .next = bond_info_seq_next, 281 .stop = bond_info_seq_stop, 282 .show = bond_info_seq_show, 283 }; 284 285 void bond_create_proc_entry(struct bonding *bond) 286 { 287 struct net_device *bond_dev = bond->dev; 288 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 289 290 if (bn->proc_dir) { 291 bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444, 292 bn->proc_dir, &bond_info_seq_ops, bond); 293 if (bond->proc_entry == NULL) 294 netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n", 295 KBUILD_MODNAME, bond_dev->name); 296 else 297 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); 298 } 299 } 300 301 void bond_remove_proc_entry(struct bonding *bond) 302 { 303 struct net_device *bond_dev = bond->dev; 304 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 305 306 if (bn->proc_dir && bond->proc_entry) { 307 remove_proc_entry(bond->proc_file_name, bn->proc_dir); 308 memset(bond->proc_file_name, 0, IFNAMSIZ); 309 bond->proc_entry = NULL; 310 } 311 } 312 313 /* Create the bonding directory under /proc/net, if doesn't exist yet. 314 * Caller must hold rtnl_lock. 315 */ 316 void __net_init bond_create_proc_dir(struct bond_net *bn) 317 { 318 if (!bn->proc_dir) { 319 bn->proc_dir = proc_mkdir(KBUILD_MODNAME, bn->net->proc_net); 320 if (!bn->proc_dir) 321 pr_warn("Warning: Cannot create /proc/net/%s\n", 322 KBUILD_MODNAME); 323 } 324 } 325 326 /* Destroy the bonding directory under /proc/net, if empty. 327 */ 328 void __net_exit bond_destroy_proc_dir(struct bond_net *bn) 329 { 330 if (bn->proc_dir) { 331 remove_proc_entry(KBUILD_MODNAME, bn->net->proc_net); 332 bn->proc_dir = NULL; 333 } 334 } 335