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 struct bond_opt_value *optval; 69 struct slave *curr; 70 int i; 71 72 read_lock(&bond->curr_slave_lock); 73 curr = bond->curr_active_slave; 74 read_unlock(&bond->curr_slave_lock); 75 76 seq_printf(seq, "Bonding Mode: %s", 77 bond_mode_name(bond->params.mode)); 78 79 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP && 80 bond->params.fail_over_mac) { 81 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC, 82 bond->params.fail_over_mac); 83 seq_printf(seq, " (fail_over_mac %s)", optval->string); 84 } 85 86 seq_printf(seq, "\n"); 87 88 if (bond->params.mode == BOND_MODE_XOR || 89 bond->params.mode == BOND_MODE_8023AD) { 90 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH, 91 bond->params.xmit_policy); 92 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", 93 optval->string, bond->params.xmit_policy); 94 } 95 96 if (USES_PRIMARY(bond->params.mode)) { 97 seq_printf(seq, "Primary Slave: %s", 98 (bond->primary_slave) ? 99 bond->primary_slave->dev->name : "None"); 100 if (bond->primary_slave) { 101 optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT, 102 bond->params.primary_reselect); 103 seq_printf(seq, " (primary_reselect %s)", 104 optval->string); 105 } 106 107 seq_printf(seq, "\nCurrently Active Slave: %s\n", 108 (curr) ? curr->dev->name : "None"); 109 } 110 111 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? 112 "up" : "down"); 113 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); 114 seq_printf(seq, "Up Delay (ms): %d\n", 115 bond->params.updelay * bond->params.miimon); 116 seq_printf(seq, "Down Delay (ms): %d\n", 117 bond->params.downdelay * bond->params.miimon); 118 119 120 /* ARP information */ 121 if (bond->params.arp_interval > 0) { 122 int printed = 0; 123 seq_printf(seq, "ARP Polling Interval (ms): %d\n", 124 bond->params.arp_interval); 125 126 seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); 127 128 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { 129 if (!bond->params.arp_targets[i]) 130 break; 131 if (printed) 132 seq_printf(seq, ","); 133 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); 134 printed = 1; 135 } 136 seq_printf(seq, "\n"); 137 } 138 139 if (bond->params.mode == BOND_MODE_8023AD) { 140 struct ad_info ad_info; 141 142 seq_puts(seq, "\n802.3ad info\n"); 143 seq_printf(seq, "LACP rate: %s\n", 144 (bond->params.lacp_fast) ? "fast" : "slow"); 145 seq_printf(seq, "Min links: %d\n", bond->params.min_links); 146 optval = bond_opt_get_val(BOND_OPT_AD_SELECT, 147 bond->params.ad_select); 148 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", 149 optval->string); 150 151 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { 152 seq_printf(seq, "bond %s has no active aggregator\n", 153 bond->dev->name); 154 } else { 155 seq_printf(seq, "Active Aggregator Info:\n"); 156 157 seq_printf(seq, "\tAggregator ID: %d\n", 158 ad_info.aggregator_id); 159 seq_printf(seq, "\tNumber of ports: %d\n", 160 ad_info.ports); 161 seq_printf(seq, "\tActor Key: %d\n", 162 ad_info.actor_key); 163 seq_printf(seq, "\tPartner Key: %d\n", 164 ad_info.partner_key); 165 seq_printf(seq, "\tPartner Mac Address: %pM\n", 166 ad_info.partner_system); 167 } 168 } 169 } 170 171 static void bond_info_show_slave(struct seq_file *seq, 172 const struct slave *slave) 173 { 174 struct bonding *bond = seq->private; 175 176 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); 177 seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link)); 178 if (slave->speed == SPEED_UNKNOWN) 179 seq_printf(seq, "Speed: %s\n", "Unknown"); 180 else 181 seq_printf(seq, "Speed: %d Mbps\n", slave->speed); 182 183 if (slave->duplex == DUPLEX_UNKNOWN) 184 seq_printf(seq, "Duplex: %s\n", "Unknown"); 185 else 186 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half"); 187 188 seq_printf(seq, "Link Failure Count: %u\n", 189 slave->link_failure_count); 190 191 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); 192 193 if (bond->params.mode == BOND_MODE_8023AD) { 194 const struct aggregator *agg 195 = SLAVE_AD_INFO(slave).port.aggregator; 196 197 if (agg) 198 seq_printf(seq, "Aggregator ID: %d\n", 199 agg->aggregator_identifier); 200 else 201 seq_puts(seq, "Aggregator ID: N/A\n"); 202 } 203 seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id); 204 } 205 206 static int bond_info_seq_show(struct seq_file *seq, void *v) 207 { 208 if (v == SEQ_START_TOKEN) { 209 seq_printf(seq, "%s\n", bond_version); 210 bond_info_show_master(seq); 211 } else 212 bond_info_show_slave(seq, v); 213 214 return 0; 215 } 216 217 static const struct seq_operations bond_info_seq_ops = { 218 .start = bond_info_seq_start, 219 .next = bond_info_seq_next, 220 .stop = bond_info_seq_stop, 221 .show = bond_info_seq_show, 222 }; 223 224 static int bond_info_open(struct inode *inode, struct file *file) 225 { 226 struct seq_file *seq; 227 int res; 228 229 res = seq_open(file, &bond_info_seq_ops); 230 if (!res) { 231 /* recover the pointer buried in proc_dir_entry data */ 232 seq = file->private_data; 233 seq->private = PDE_DATA(inode); 234 } 235 236 return res; 237 } 238 239 static const struct file_operations bond_info_fops = { 240 .owner = THIS_MODULE, 241 .open = bond_info_open, 242 .read = seq_read, 243 .llseek = seq_lseek, 244 .release = seq_release, 245 }; 246 247 void bond_create_proc_entry(struct bonding *bond) 248 { 249 struct net_device *bond_dev = bond->dev; 250 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 251 252 if (bn->proc_dir) { 253 bond->proc_entry = proc_create_data(bond_dev->name, 254 S_IRUGO, bn->proc_dir, 255 &bond_info_fops, bond); 256 if (bond->proc_entry == NULL) 257 pr_warning("Warning: Cannot create /proc/net/%s/%s\n", 258 DRV_NAME, bond_dev->name); 259 else 260 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); 261 } 262 } 263 264 void bond_remove_proc_entry(struct bonding *bond) 265 { 266 struct net_device *bond_dev = bond->dev; 267 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 268 269 if (bn->proc_dir && bond->proc_entry) { 270 remove_proc_entry(bond->proc_file_name, bn->proc_dir); 271 memset(bond->proc_file_name, 0, IFNAMSIZ); 272 bond->proc_entry = NULL; 273 } 274 } 275 276 /* Create the bonding directory under /proc/net, if doesn't exist yet. 277 * Caller must hold rtnl_lock. 278 */ 279 void __net_init bond_create_proc_dir(struct bond_net *bn) 280 { 281 if (!bn->proc_dir) { 282 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net); 283 if (!bn->proc_dir) 284 pr_warning("Warning: cannot create /proc/net/%s\n", 285 DRV_NAME); 286 } 287 } 288 289 /* Destroy the bonding directory under /proc/net, if empty. 290 * Caller must hold rtnl_lock. 291 */ 292 void __net_exit bond_destroy_proc_dir(struct bond_net *bn) 293 { 294 if (bn->proc_dir) { 295 remove_proc_entry(DRV_NAME, bn->net->proc_net); 296 bn->proc_dir = NULL; 297 } 298 } 299