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 "bonding.h" 6 7 8 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) 9 __acquires(RCU) 10 __acquires(&bond->lock) 11 { 12 struct bonding *bond = seq->private; 13 struct list_head *iter; 14 struct slave *slave; 15 loff_t off = 0; 16 17 /* make sure the bond won't be taken away */ 18 rcu_read_lock(); 19 read_lock(&bond->lock); 20 21 if (*pos == 0) 22 return SEQ_START_TOKEN; 23 24 bond_for_each_slave(bond, slave, iter) 25 if (++off == *pos) 26 return slave; 27 28 return NULL; 29 } 30 31 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) 32 { 33 struct bonding *bond = seq->private; 34 struct list_head *iter; 35 struct slave *slave; 36 bool found = false; 37 38 ++*pos; 39 if (v == SEQ_START_TOKEN) 40 return bond_first_slave(bond); 41 42 if (bond_is_last_slave(bond, v)) 43 return NULL; 44 45 bond_for_each_slave(bond, slave, iter) { 46 if (found) 47 return slave; 48 if (slave == v) 49 found = true; 50 } 51 52 return NULL; 53 } 54 55 static void bond_info_seq_stop(struct seq_file *seq, void *v) 56 __releases(&bond->lock) 57 __releases(RCU) 58 { 59 struct bonding *bond = seq->private; 60 61 read_unlock(&bond->lock); 62 rcu_read_unlock(); 63 } 64 65 static void bond_info_show_master(struct seq_file *seq) 66 { 67 struct bonding *bond = seq->private; 68 const struct bond_opt_value *optval; 69 struct slave *curr; 70 int i; 71 72 curr = rcu_dereference(bond->curr_active_slave); 73 74 seq_printf(seq, "Bonding Mode: %s", 75 bond_mode_name(BOND_MODE(bond))); 76 77 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && 78 bond->params.fail_over_mac) { 79 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC, 80 bond->params.fail_over_mac); 81 seq_printf(seq, " (fail_over_mac %s)", optval->string); 82 } 83 84 seq_printf(seq, "\n"); 85 86 if (BOND_MODE(bond) == BOND_MODE_XOR || 87 BOND_MODE(bond) == BOND_MODE_8023AD) { 88 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH, 89 bond->params.xmit_policy); 90 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", 91 optval->string, bond->params.xmit_policy); 92 } 93 94 if (bond_uses_primary(bond)) { 95 seq_printf(seq, "Primary Slave: %s", 96 (bond->primary_slave) ? 97 bond->primary_slave->dev->name : "None"); 98 if (bond->primary_slave) { 99 optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT, 100 bond->params.primary_reselect); 101 seq_printf(seq, " (primary_reselect %s)", 102 optval->string); 103 } 104 105 seq_printf(seq, "\nCurrently Active Slave: %s\n", 106 (curr) ? curr->dev->name : "None"); 107 } 108 109 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? 110 "up" : "down"); 111 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); 112 seq_printf(seq, "Up Delay (ms): %d\n", 113 bond->params.updelay * bond->params.miimon); 114 seq_printf(seq, "Down Delay (ms): %d\n", 115 bond->params.downdelay * bond->params.miimon); 116 117 118 /* ARP information */ 119 if (bond->params.arp_interval > 0) { 120 int printed = 0; 121 seq_printf(seq, "ARP Polling Interval (ms): %d\n", 122 bond->params.arp_interval); 123 124 seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); 125 126 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { 127 if (!bond->params.arp_targets[i]) 128 break; 129 if (printed) 130 seq_printf(seq, ","); 131 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); 132 printed = 1; 133 } 134 seq_printf(seq, "\n"); 135 } 136 137 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 138 struct ad_info ad_info; 139 140 seq_puts(seq, "\n802.3ad info\n"); 141 seq_printf(seq, "LACP rate: %s\n", 142 (bond->params.lacp_fast) ? "fast" : "slow"); 143 seq_printf(seq, "Min links: %d\n", bond->params.min_links); 144 optval = bond_opt_get_val(BOND_OPT_AD_SELECT, 145 bond->params.ad_select); 146 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", 147 optval->string); 148 149 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { 150 seq_printf(seq, "bond %s has no active aggregator\n", 151 bond->dev->name); 152 } else { 153 seq_printf(seq, "Active Aggregator Info:\n"); 154 155 seq_printf(seq, "\tAggregator ID: %d\n", 156 ad_info.aggregator_id); 157 seq_printf(seq, "\tNumber of ports: %d\n", 158 ad_info.ports); 159 seq_printf(seq, "\tActor Key: %d\n", 160 ad_info.actor_key); 161 seq_printf(seq, "\tPartner Key: %d\n", 162 ad_info.partner_key); 163 seq_printf(seq, "\tPartner Mac Address: %pM\n", 164 ad_info.partner_system); 165 } 166 } 167 } 168 169 static void bond_info_show_slave(struct seq_file *seq, 170 const struct slave *slave) 171 { 172 struct bonding *bond = seq->private; 173 174 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); 175 seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link)); 176 if (slave->speed == SPEED_UNKNOWN) 177 seq_printf(seq, "Speed: %s\n", "Unknown"); 178 else 179 seq_printf(seq, "Speed: %d Mbps\n", slave->speed); 180 181 if (slave->duplex == DUPLEX_UNKNOWN) 182 seq_printf(seq, "Duplex: %s\n", "Unknown"); 183 else 184 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half"); 185 186 seq_printf(seq, "Link Failure Count: %u\n", 187 slave->link_failure_count); 188 189 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); 190 191 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 192 const struct aggregator *agg 193 = SLAVE_AD_INFO(slave)->port.aggregator; 194 195 if (agg) 196 seq_printf(seq, "Aggregator ID: %d\n", 197 agg->aggregator_identifier); 198 else 199 seq_puts(seq, "Aggregator ID: N/A\n"); 200 } 201 seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id); 202 } 203 204 static int bond_info_seq_show(struct seq_file *seq, void *v) 205 { 206 if (v == SEQ_START_TOKEN) { 207 seq_printf(seq, "%s\n", bond_version); 208 bond_info_show_master(seq); 209 } else 210 bond_info_show_slave(seq, v); 211 212 return 0; 213 } 214 215 static const struct seq_operations bond_info_seq_ops = { 216 .start = bond_info_seq_start, 217 .next = bond_info_seq_next, 218 .stop = bond_info_seq_stop, 219 .show = bond_info_seq_show, 220 }; 221 222 static int bond_info_open(struct inode *inode, struct file *file) 223 { 224 struct seq_file *seq; 225 int res; 226 227 res = seq_open(file, &bond_info_seq_ops); 228 if (!res) { 229 /* recover the pointer buried in proc_dir_entry data */ 230 seq = file->private_data; 231 seq->private = PDE_DATA(inode); 232 } 233 234 return res; 235 } 236 237 static const struct file_operations bond_info_fops = { 238 .owner = THIS_MODULE, 239 .open = bond_info_open, 240 .read = seq_read, 241 .llseek = seq_lseek, 242 .release = seq_release, 243 }; 244 245 void bond_create_proc_entry(struct bonding *bond) 246 { 247 struct net_device *bond_dev = bond->dev; 248 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 249 250 if (bn->proc_dir) { 251 bond->proc_entry = proc_create_data(bond_dev->name, 252 S_IRUGO, bn->proc_dir, 253 &bond_info_fops, bond); 254 if (bond->proc_entry == NULL) 255 netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n", 256 DRV_NAME, bond_dev->name); 257 else 258 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); 259 } 260 } 261 262 void bond_remove_proc_entry(struct bonding *bond) 263 { 264 struct net_device *bond_dev = bond->dev; 265 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 266 267 if (bn->proc_dir && bond->proc_entry) { 268 remove_proc_entry(bond->proc_file_name, bn->proc_dir); 269 memset(bond->proc_file_name, 0, IFNAMSIZ); 270 bond->proc_entry = NULL; 271 } 272 } 273 274 /* Create the bonding directory under /proc/net, if doesn't exist yet. 275 * Caller must hold rtnl_lock. 276 */ 277 void __net_init bond_create_proc_dir(struct bond_net *bn) 278 { 279 if (!bn->proc_dir) { 280 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net); 281 if (!bn->proc_dir) 282 pr_warn("Warning: Cannot create /proc/net/%s\n", 283 DRV_NAME); 284 } 285 } 286 287 /* Destroy the bonding directory under /proc/net, if empty. 288 * Caller must hold rtnl_lock. 289 */ 290 void __net_exit bond_destroy_proc_dir(struct bond_net *bn) 291 { 292 if (bn->proc_dir) { 293 remove_proc_entry(DRV_NAME, bn->net->proc_net); 294 bn->proc_dir = NULL; 295 } 296 } 297