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 loff_t off = 0; 14 struct slave *slave; 15 int i; 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, i) { 25 if (++off == *pos) 26 return slave; 27 } 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 = seq->private; 35 struct slave *slave = v; 36 37 ++*pos; 38 if (v == SEQ_START_TOKEN) 39 return bond->first_slave; 40 41 slave = slave->next; 42 43 return (slave == bond->first_slave) ? NULL : slave; 44 } 45 46 static void bond_info_seq_stop(struct seq_file *seq, void *v) 47 __releases(&bond->lock) 48 __releases(RCU) 49 { 50 struct bonding *bond = seq->private; 51 52 read_unlock(&bond->lock); 53 rcu_read_unlock(); 54 } 55 56 static void bond_info_show_master(struct seq_file *seq) 57 { 58 struct bonding *bond = seq->private; 59 struct slave *curr; 60 int i; 61 62 read_lock(&bond->curr_slave_lock); 63 curr = bond->curr_active_slave; 64 read_unlock(&bond->curr_slave_lock); 65 66 seq_printf(seq, "Bonding Mode: %s", 67 bond_mode_name(bond->params.mode)); 68 69 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP && 70 bond->params.fail_over_mac) 71 seq_printf(seq, " (fail_over_mac %s)", 72 fail_over_mac_tbl[bond->params.fail_over_mac].modename); 73 74 seq_printf(seq, "\n"); 75 76 if (bond->params.mode == BOND_MODE_XOR || 77 bond->params.mode == BOND_MODE_8023AD) { 78 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", 79 xmit_hashtype_tbl[bond->params.xmit_policy].modename, 80 bond->params.xmit_policy); 81 } 82 83 if (USES_PRIMARY(bond->params.mode)) { 84 seq_printf(seq, "Primary Slave: %s", 85 (bond->primary_slave) ? 86 bond->primary_slave->dev->name : "None"); 87 if (bond->primary_slave) 88 seq_printf(seq, " (primary_reselect %s)", 89 pri_reselect_tbl[bond->params.primary_reselect].modename); 90 91 seq_printf(seq, "\nCurrently Active Slave: %s\n", 92 (curr) ? curr->dev->name : "None"); 93 } 94 95 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? 96 "up" : "down"); 97 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); 98 seq_printf(seq, "Up Delay (ms): %d\n", 99 bond->params.updelay * bond->params.miimon); 100 seq_printf(seq, "Down Delay (ms): %d\n", 101 bond->params.downdelay * bond->params.miimon); 102 103 104 /* ARP information */ 105 if (bond->params.arp_interval > 0) { 106 int printed = 0; 107 seq_printf(seq, "ARP Polling Interval (ms): %d\n", 108 bond->params.arp_interval); 109 110 seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); 111 112 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { 113 if (!bond->params.arp_targets[i]) 114 break; 115 if (printed) 116 seq_printf(seq, ","); 117 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); 118 printed = 1; 119 } 120 seq_printf(seq, "\n"); 121 } 122 123 if (bond->params.mode == BOND_MODE_8023AD) { 124 struct ad_info ad_info; 125 126 seq_puts(seq, "\n802.3ad info\n"); 127 seq_printf(seq, "LACP rate: %s\n", 128 (bond->params.lacp_fast) ? "fast" : "slow"); 129 seq_printf(seq, "Min links: %d\n", bond->params.min_links); 130 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", 131 ad_select_tbl[bond->params.ad_select].modename); 132 133 if (bond_3ad_get_active_agg_info(bond, &ad_info)) { 134 seq_printf(seq, "bond %s has no active aggregator\n", 135 bond->dev->name); 136 } else { 137 seq_printf(seq, "Active Aggregator Info:\n"); 138 139 seq_printf(seq, "\tAggregator ID: %d\n", 140 ad_info.aggregator_id); 141 seq_printf(seq, "\tNumber of ports: %d\n", 142 ad_info.ports); 143 seq_printf(seq, "\tActor Key: %d\n", 144 ad_info.actor_key); 145 seq_printf(seq, "\tPartner Key: %d\n", 146 ad_info.partner_key); 147 seq_printf(seq, "\tPartner Mac Address: %pM\n", 148 ad_info.partner_system); 149 } 150 } 151 } 152 153 static const char *bond_slave_link_status(s8 link) 154 { 155 static const char * const status[] = { 156 [BOND_LINK_UP] = "up", 157 [BOND_LINK_FAIL] = "going down", 158 [BOND_LINK_DOWN] = "down", 159 [BOND_LINK_BACK] = "going back", 160 }; 161 162 return status[link]; 163 } 164 165 static void bond_info_show_slave(struct seq_file *seq, 166 const struct slave *slave) 167 { 168 struct bonding *bond = seq->private; 169 170 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); 171 seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link)); 172 if (slave->speed == SPEED_UNKNOWN) 173 seq_printf(seq, "Speed: %s\n", "Unknown"); 174 else 175 seq_printf(seq, "Speed: %d Mbps\n", slave->speed); 176 177 if (slave->duplex == DUPLEX_UNKNOWN) 178 seq_printf(seq, "Duplex: %s\n", "Unknown"); 179 else 180 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half"); 181 182 seq_printf(seq, "Link Failure Count: %u\n", 183 slave->link_failure_count); 184 185 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); 186 187 if (bond->params.mode == BOND_MODE_8023AD) { 188 const struct aggregator *agg 189 = SLAVE_AD_INFO(slave).port.aggregator; 190 191 if (agg) 192 seq_printf(seq, "Aggregator ID: %d\n", 193 agg->aggregator_identifier); 194 else 195 seq_puts(seq, "Aggregator ID: N/A\n"); 196 } 197 seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id); 198 } 199 200 static int bond_info_seq_show(struct seq_file *seq, void *v) 201 { 202 if (v == SEQ_START_TOKEN) { 203 seq_printf(seq, "%s\n", bond_version); 204 bond_info_show_master(seq); 205 } else 206 bond_info_show_slave(seq, v); 207 208 return 0; 209 } 210 211 static const struct seq_operations bond_info_seq_ops = { 212 .start = bond_info_seq_start, 213 .next = bond_info_seq_next, 214 .stop = bond_info_seq_stop, 215 .show = bond_info_seq_show, 216 }; 217 218 static int bond_info_open(struct inode *inode, struct file *file) 219 { 220 struct seq_file *seq; 221 struct proc_dir_entry *proc; 222 int res; 223 224 res = seq_open(file, &bond_info_seq_ops); 225 if (!res) { 226 /* recover the pointer buried in proc_dir_entry data */ 227 seq = file->private_data; 228 proc = PDE(inode); 229 seq->private = proc->data; 230 } 231 232 return res; 233 } 234 235 static const struct file_operations bond_info_fops = { 236 .owner = THIS_MODULE, 237 .open = bond_info_open, 238 .read = seq_read, 239 .llseek = seq_lseek, 240 .release = seq_release, 241 }; 242 243 void bond_create_proc_entry(struct bonding *bond) 244 { 245 struct net_device *bond_dev = bond->dev; 246 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 247 248 if (bn->proc_dir) { 249 bond->proc_entry = proc_create_data(bond_dev->name, 250 S_IRUGO, bn->proc_dir, 251 &bond_info_fops, bond); 252 if (bond->proc_entry == NULL) 253 pr_warning("Warning: Cannot create /proc/net/%s/%s\n", 254 DRV_NAME, bond_dev->name); 255 else 256 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); 257 } 258 } 259 260 void bond_remove_proc_entry(struct bonding *bond) 261 { 262 struct net_device *bond_dev = bond->dev; 263 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); 264 265 if (bn->proc_dir && bond->proc_entry) { 266 remove_proc_entry(bond->proc_file_name, bn->proc_dir); 267 memset(bond->proc_file_name, 0, IFNAMSIZ); 268 bond->proc_entry = NULL; 269 } 270 } 271 272 /* Create the bonding directory under /proc/net, if doesn't exist yet. 273 * Caller must hold rtnl_lock. 274 */ 275 void __net_init bond_create_proc_dir(struct bond_net *bn) 276 { 277 if (!bn->proc_dir) { 278 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net); 279 if (!bn->proc_dir) 280 pr_warning("Warning: cannot create /proc/net/%s\n", 281 DRV_NAME); 282 } 283 } 284 285 /* Destroy the bonding directory under /proc/net, if empty. 286 * Caller must hold rtnl_lock. 287 */ 288 void __net_exit bond_destroy_proc_dir(struct bond_net *bn) 289 { 290 if (bn->proc_dir) { 291 remove_proc_entry(DRV_NAME, bn->net->proc_net); 292 bn->proc_dir = NULL; 293 } 294 } 295