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 arp_interval, fail_over_mac, miimon, 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 fail_over_mac = READ_ONCE(bond->params.fail_over_mac); 72 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && fail_over_mac) { 73 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC, 74 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 int xmit_policy = READ_ONCE(bond->params.xmit_policy); 82 83 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH, xmit_policy); 84 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", 85 optval->string, xmit_policy); 86 } 87 88 if (bond_uses_primary(bond)) { 89 primary = rcu_dereference(bond->primary_slave); 90 seq_printf(seq, "Primary Slave: %s", 91 primary ? primary->dev->name : "None"); 92 if (primary) { 93 optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT, 94 READ_ONCE(bond->params.primary_reselect)); 95 seq_printf(seq, " (primary_reselect %s)", 96 optval->string); 97 } 98 99 seq_printf(seq, "\nCurrently Active Slave: %s\n", 100 (curr) ? curr->dev->name : "None"); 101 } 102 103 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? 104 "up" : "down"); 105 miimon = READ_ONCE(bond->params.miimon); 106 seq_printf(seq, "MII Polling Interval (ms): %d\n", miimon); 107 seq_printf(seq, "Up Delay (ms): %d\n", 108 READ_ONCE(bond->params.updelay) * miimon); 109 seq_printf(seq, "Down Delay (ms): %d\n", 110 READ_ONCE(bond->params.downdelay) * miimon); 111 seq_printf(seq, "Peer Notification Delay (ms): %d\n", 112 READ_ONCE(bond->params.peer_notif_delay) * miimon); 113 114 115 /* ARP information */ 116 arp_interval = READ_ONCE(bond->params.arp_interval); 117 if (arp_interval > 0) { 118 int printed = 0; 119 120 seq_printf(seq, "ARP Polling Interval (ms): %d\n", 121 arp_interval); 122 seq_printf(seq, "ARP Missed Max: %u\n", 123 READ_ONCE(bond->params.missed_max)); 124 125 seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); 126 127 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { 128 __be32 t = READ_ONCE(bond->params.arp_targets[i]); 129 130 if (!t) 131 break; 132 if (printed) 133 seq_printf(seq, ","); 134 seq_printf(seq, " %pI4", &t); 135 printed = 1; 136 } 137 seq_printf(seq, "\n"); 138 139 #if IS_ENABLED(CONFIG_IPV6) 140 printed = 0; 141 seq_printf(seq, "NS IPv6 target/s (xx::xx form):"); 142 143 for (i = 0; (i < BOND_MAX_NS_TARGETS); i++) { 144 if (ipv6_addr_any(&bond->params.ns_targets[i])) 145 break; 146 if (printed) 147 seq_printf(seq, ","); 148 seq_printf(seq, " %pI6c", &bond->params.ns_targets[i]); 149 printed = 1; 150 } 151 seq_printf(seq, "\n"); 152 #endif 153 } 154 155 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 156 struct ad_info ad_info; 157 158 seq_puts(seq, "\n802.3ad info\n"); 159 seq_printf(seq, "LACP active: %s\n", 160 READ_ONCE(bond->params.lacp_active) ? "on" : "off"); 161 seq_printf(seq, "LACP rate: %s\n", 162 READ_ONCE(bond->params.lacp_fast) ? "fast" : "slow"); 163 seq_printf(seq, "Min links: %d\n", 164 READ_ONCE(bond->params.min_links)); 165 optval = bond_opt_get_val(BOND_OPT_AD_SELECT, 166 READ_ONCE(bond->params.ad_select)); 167 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", 168 optval->string); 169 if (capable(CAP_NET_ADMIN)) { 170 seq_printf(seq, "System priority: %d\n", 171 BOND_AD_INFO(bond).system.sys_priority); 172 seq_printf(seq, "System MAC address: %pM\n", 173 &BOND_AD_INFO(bond).system.sys_mac_addr); 174 175 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { 176 seq_printf(seq, 177 "bond %s has no active aggregator\n", 178 bond->dev->name); 179 } else { 180 seq_printf(seq, "Active Aggregator Info:\n"); 181 182 seq_printf(seq, "\tAggregator ID: %d\n", 183 ad_info.aggregator_id); 184 seq_printf(seq, "\tNumber of ports: %d\n", 185 ad_info.ports); 186 seq_printf(seq, "\tActor Key: %d\n", 187 ad_info.actor_key); 188 seq_printf(seq, "\tPartner Key: %d\n", 189 ad_info.partner_key); 190 seq_printf(seq, "\tPartner Mac Address: %pM\n", 191 ad_info.partner_system); 192 } 193 } 194 } 195 } 196 197 /* Note: runs under rcu_read_lock() */ 198 static void bond_info_show_slave(struct seq_file *seq, 199 const struct slave *slave) 200 { 201 struct bonding *bond = pde_data(file_inode(seq->file)); 202 203 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); 204 seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link)); 205 if (slave->speed == SPEED_UNKNOWN) 206 seq_printf(seq, "Speed: %s\n", "Unknown"); 207 else 208 seq_printf(seq, "Speed: %d Mbps\n", slave->speed); 209 210 if (slave->duplex == DUPLEX_UNKNOWN) 211 seq_printf(seq, "Duplex: %s\n", "Unknown"); 212 else 213 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half"); 214 215 seq_printf(seq, "Link Failure Count: %u\n", 216 slave->link_failure_count); 217 218 seq_printf(seq, "Permanent HW addr: %*phC\n", 219 slave->dev->addr_len, slave->perm_hwaddr); 220 seq_printf(seq, "Slave queue ID: %d\n", READ_ONCE(slave->queue_id)); 221 222 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 223 const struct port *port = &SLAVE_AD_INFO(slave)->port; 224 const struct aggregator *agg = rcu_dereference(port->aggregator); 225 226 if (agg) { 227 seq_printf(seq, "Aggregator ID: %d\n", 228 agg->aggregator_identifier); 229 seq_printf(seq, "Actor Churn State: %s\n", 230 bond_3ad_churn_desc(READ_ONCE(port->sm_churn_actor_state))); 231 seq_printf(seq, "Partner Churn State: %s\n", 232 bond_3ad_churn_desc(READ_ONCE(port->sm_churn_partner_state))); 233 seq_printf(seq, "Actor Churned Count: %d\n", 234 READ_ONCE(port->churn_actor_count)); 235 seq_printf(seq, "Partner Churned Count: %d\n", 236 READ_ONCE(port->churn_partner_count)); 237 238 if (capable(CAP_NET_ADMIN)) { 239 seq_puts(seq, "details actor lacp pdu:\n"); 240 seq_printf(seq, " system priority: %d\n", 241 port->actor_system_priority); 242 seq_printf(seq, " system mac address: %pM\n", 243 &port->actor_system); 244 seq_printf(seq, " port key: %d\n", 245 port->actor_oper_port_key); 246 seq_printf(seq, " port priority: %d\n", 247 port->actor_port_priority); 248 seq_printf(seq, " port number: %d\n", 249 port->actor_port_number); 250 seq_printf(seq, " port state: %d\n", 251 port->actor_oper_port_state); 252 253 seq_puts(seq, "details partner lacp pdu:\n"); 254 seq_printf(seq, " system priority: %d\n", 255 port->partner_oper.system_priority); 256 seq_printf(seq, " system mac address: %pM\n", 257 &port->partner_oper.system); 258 seq_printf(seq, " oper key: %d\n", 259 port->partner_oper.key); 260 seq_printf(seq, " port priority: %d\n", 261 port->partner_oper.port_priority); 262 seq_printf(seq, " port number: %d\n", 263 port->partner_oper.port_number); 264 seq_printf(seq, " port state: %d\n", 265 port->partner_oper.port_state); 266 } 267 } else { 268 seq_puts(seq, "Aggregator ID: N/A\n"); 269 } 270 } 271 } 272 273 static int bond_info_seq_show(struct seq_file *seq, void *v) 274 { 275 if (v == SEQ_START_TOKEN) { 276 seq_printf(seq, "%s\n", bond_version); 277 bond_info_show_master(seq); 278 } else 279 bond_info_show_slave(seq, v); 280 281 return 0; 282 } 283 284 static const struct seq_operations bond_info_seq_ops = { 285 .start = bond_info_seq_start, 286 .next = bond_info_seq_next, 287 .stop = bond_info_seq_stop, 288 .show = bond_info_seq_show, 289 }; 290 291 void bond_create_proc_entry(struct bonding *bond) 292 { 293 struct net_device *bond_dev = bond->dev; 294 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 295 296 if (bn->proc_dir) { 297 bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444, 298 bn->proc_dir, &bond_info_seq_ops, bond); 299 if (bond->proc_entry == NULL) 300 netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n", 301 KBUILD_MODNAME, bond_dev->name); 302 else 303 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); 304 } 305 } 306 307 void bond_remove_proc_entry(struct bonding *bond) 308 { 309 struct net_device *bond_dev = bond->dev; 310 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 311 312 if (bn->proc_dir && bond->proc_entry) { 313 remove_proc_entry(bond->proc_file_name, bn->proc_dir); 314 memset(bond->proc_file_name, 0, IFNAMSIZ); 315 bond->proc_entry = NULL; 316 } 317 } 318 319 /* Create the bonding directory under /proc/net, if doesn't exist yet. 320 * Caller must hold rtnl_lock. 321 */ 322 void __net_init bond_create_proc_dir(struct bond_net *bn) 323 { 324 if (!bn->proc_dir) { 325 bn->proc_dir = proc_mkdir(KBUILD_MODNAME, bn->net->proc_net); 326 if (!bn->proc_dir) 327 pr_warn("Warning: Cannot create /proc/net/%s\n", 328 KBUILD_MODNAME); 329 } 330 } 331 332 /* Destroy the bonding directory under /proc/net, if empty. 333 */ 334 void __net_exit bond_destroy_proc_dir(struct bond_net *bn) 335 { 336 if (bn->proc_dir) { 337 remove_proc_entry(KBUILD_MODNAME, bn->net->proc_net); 338 bn->proc_dir = NULL; 339 } 340 } 341