1 #include <linux/proc_fs.h> 2 #include <linux/export.h> 3 #include <net/net_namespace.h> 4 #include <net/netns/generic.h> 5 #include <net/bonding.h> 6 7 8 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) 9 __acquires(RCU) 10 { 11 struct bonding *bond = seq->private; 12 struct list_head *iter; 13 struct slave *slave; 14 loff_t off = 0; 15 16 rcu_read_lock(); 17 18 if (*pos == 0) 19 return SEQ_START_TOKEN; 20 21 bond_for_each_slave_rcu(bond, slave, iter) 22 if (++off == *pos) 23 return slave; 24 25 return NULL; 26 } 27 28 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) 29 { 30 struct bonding *bond = seq->private; 31 struct list_head *iter; 32 struct slave *slave; 33 bool found = false; 34 35 ++*pos; 36 if (v == SEQ_START_TOKEN) 37 return bond_first_slave_rcu(bond); 38 39 bond_for_each_slave_rcu(bond, slave, iter) { 40 if (found) 41 return slave; 42 if (slave == v) 43 found = true; 44 } 45 46 return NULL; 47 } 48 49 static void bond_info_seq_stop(struct seq_file *seq, void *v) 50 __releases(RCU) 51 { 52 rcu_read_unlock(); 53 } 54 55 static void bond_info_show_master(struct seq_file *seq) 56 { 57 struct bonding *bond = seq->private; 58 const struct bond_opt_value *optval; 59 struct slave *curr, *primary; 60 int i; 61 62 curr = rcu_dereference(bond->curr_active_slave); 63 64 seq_printf(seq, "Bonding Mode: %s", 65 bond_mode_name(BOND_MODE(bond))); 66 67 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && 68 bond->params.fail_over_mac) { 69 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC, 70 bond->params.fail_over_mac); 71 seq_printf(seq, " (fail_over_mac %s)", optval->string); 72 } 73 74 seq_printf(seq, "\n"); 75 76 if (bond_mode_uses_xmit_hash(bond)) { 77 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH, 78 bond->params.xmit_policy); 79 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", 80 optval->string, bond->params.xmit_policy); 81 } 82 83 if (bond_uses_primary(bond)) { 84 primary = rcu_dereference(bond->primary_slave); 85 seq_printf(seq, "Primary Slave: %s", 86 primary ? primary->dev->name : "None"); 87 if (primary) { 88 optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT, 89 bond->params.primary_reselect); 90 seq_printf(seq, " (primary_reselect %s)", 91 optval->string); 92 } 93 94 seq_printf(seq, "\nCurrently Active Slave: %s\n", 95 (curr) ? curr->dev->name : "None"); 96 } 97 98 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? 99 "up" : "down"); 100 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); 101 seq_printf(seq, "Up Delay (ms): %d\n", 102 bond->params.updelay * bond->params.miimon); 103 seq_printf(seq, "Down Delay (ms): %d\n", 104 bond->params.downdelay * bond->params.miimon); 105 106 107 /* ARP information */ 108 if (bond->params.arp_interval > 0) { 109 int printed = 0; 110 seq_printf(seq, "ARP Polling Interval (ms): %d\n", 111 bond->params.arp_interval); 112 113 seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); 114 115 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { 116 if (!bond->params.arp_targets[i]) 117 break; 118 if (printed) 119 seq_printf(seq, ","); 120 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); 121 printed = 1; 122 } 123 seq_printf(seq, "\n"); 124 } 125 126 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 127 struct ad_info ad_info; 128 129 seq_puts(seq, "\n802.3ad info\n"); 130 seq_printf(seq, "LACP rate: %s\n", 131 (bond->params.lacp_fast) ? "fast" : "slow"); 132 seq_printf(seq, "Min links: %d\n", bond->params.min_links); 133 optval = bond_opt_get_val(BOND_OPT_AD_SELECT, 134 bond->params.ad_select); 135 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", 136 optval->string); 137 138 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { 139 seq_printf(seq, "bond %s has no active aggregator\n", 140 bond->dev->name); 141 } else { 142 seq_printf(seq, "Active Aggregator Info:\n"); 143 144 seq_printf(seq, "\tAggregator ID: %d\n", 145 ad_info.aggregator_id); 146 seq_printf(seq, "\tNumber of ports: %d\n", 147 ad_info.ports); 148 seq_printf(seq, "\tActor Key: %d\n", 149 ad_info.actor_key); 150 seq_printf(seq, "\tPartner Key: %d\n", 151 ad_info.partner_key); 152 seq_printf(seq, "\tPartner Mac Address: %pM\n", 153 ad_info.partner_system); 154 } 155 } 156 } 157 158 static void bond_info_show_slave(struct seq_file *seq, 159 const struct slave *slave) 160 { 161 struct bonding *bond = seq->private; 162 163 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); 164 seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link)); 165 if (slave->speed == SPEED_UNKNOWN) 166 seq_printf(seq, "Speed: %s\n", "Unknown"); 167 else 168 seq_printf(seq, "Speed: %d Mbps\n", slave->speed); 169 170 if (slave->duplex == DUPLEX_UNKNOWN) 171 seq_printf(seq, "Duplex: %s\n", "Unknown"); 172 else 173 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half"); 174 175 seq_printf(seq, "Link Failure Count: %u\n", 176 slave->link_failure_count); 177 178 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); 179 180 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 181 const struct aggregator *agg 182 = SLAVE_AD_INFO(slave)->port.aggregator; 183 184 if (agg) 185 seq_printf(seq, "Aggregator ID: %d\n", 186 agg->aggregator_identifier); 187 else 188 seq_puts(seq, "Aggregator ID: N/A\n"); 189 } 190 seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id); 191 } 192 193 static int bond_info_seq_show(struct seq_file *seq, void *v) 194 { 195 if (v == SEQ_START_TOKEN) { 196 seq_printf(seq, "%s\n", bond_version); 197 bond_info_show_master(seq); 198 } else 199 bond_info_show_slave(seq, v); 200 201 return 0; 202 } 203 204 static const struct seq_operations bond_info_seq_ops = { 205 .start = bond_info_seq_start, 206 .next = bond_info_seq_next, 207 .stop = bond_info_seq_stop, 208 .show = bond_info_seq_show, 209 }; 210 211 static int bond_info_open(struct inode *inode, struct file *file) 212 { 213 struct seq_file *seq; 214 int res; 215 216 res = seq_open(file, &bond_info_seq_ops); 217 if (!res) { 218 /* recover the pointer buried in proc_dir_entry data */ 219 seq = file->private_data; 220 seq->private = PDE_DATA(inode); 221 } 222 223 return res; 224 } 225 226 static const struct file_operations bond_info_fops = { 227 .owner = THIS_MODULE, 228 .open = bond_info_open, 229 .read = seq_read, 230 .llseek = seq_lseek, 231 .release = seq_release, 232 }; 233 234 void bond_create_proc_entry(struct bonding *bond) 235 { 236 struct net_device *bond_dev = bond->dev; 237 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 238 239 if (bn->proc_dir) { 240 bond->proc_entry = proc_create_data(bond_dev->name, 241 S_IRUGO, bn->proc_dir, 242 &bond_info_fops, bond); 243 if (bond->proc_entry == NULL) 244 netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n", 245 DRV_NAME, bond_dev->name); 246 else 247 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); 248 } 249 } 250 251 void bond_remove_proc_entry(struct bonding *bond) 252 { 253 struct net_device *bond_dev = bond->dev; 254 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 255 256 if (bn->proc_dir && bond->proc_entry) { 257 remove_proc_entry(bond->proc_file_name, bn->proc_dir); 258 memset(bond->proc_file_name, 0, IFNAMSIZ); 259 bond->proc_entry = NULL; 260 } 261 } 262 263 /* Create the bonding directory under /proc/net, if doesn't exist yet. 264 * Caller must hold rtnl_lock. 265 */ 266 void __net_init bond_create_proc_dir(struct bond_net *bn) 267 { 268 if (!bn->proc_dir) { 269 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net); 270 if (!bn->proc_dir) 271 pr_warn("Warning: Cannot create /proc/net/%s\n", 272 DRV_NAME); 273 } 274 } 275 276 /* Destroy the bonding directory under /proc/net, if empty. 277 * Caller must hold rtnl_lock. 278 */ 279 void __net_exit bond_destroy_proc_dir(struct bond_net *bn) 280 { 281 if (bn->proc_dir) { 282 remove_proc_entry(DRV_NAME, bn->net->proc_net); 283 bn->proc_dir = NULL; 284 } 285 } 286