kernel/drivers/net/bonding/bond_procfs.c

   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 #include "bonding_priv.h"
   8
   9 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
  10         __acquires(RCU)
  11 {
  12         struct bonding *bond = seq->private;
  13         struct list_head *iter;
  14         struct slave *slave;
  15         loff_t off = 0;
  16
  17         rcu_read_lock();
  18
  19         if (*pos == 0)
  20                 return SEQ_START_TOKEN;
  21
  22         bond_for_each_slave_rcu(bond, slave, iter)
  23                 if (++off == *pos)
  24                         return slave;
  25
  26         return NULL;
  27 }
  28
  29 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  30 {
  31         struct bonding *bond = seq->private;
  32         struct list_head *iter;
  33         struct slave *slave;
  34         bool found = false;
  35
  36         ++*pos;
  37         if (v == SEQ_START_TOKEN)
  38                 return bond_first_slave_rcu(bond);
  39
  40         bond_for_each_slave_rcu(bond, slave, iter) {
  41                 if (found)
  42                         return slave;
  43                 if (slave == v)
  44                         found = true;
  45         }
  46
  47         return NULL;
  48 }
  49
  50 static void bond_info_seq_stop(struct seq_file *seq, void *v)
  51         __releases(RCU)
  52 {
  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         const struct bond_opt_value *optval;
  60         struct slave *curr, *primary;
  61         int i;
  62
  63         curr = rcu_dereference(bond->curr_active_slave);
  64
  65         seq_printf(seq, "Bonding Mode: %s",
  66                    bond_mode_name(BOND_MODE(bond)));
  67
  68         if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
  69             bond->params.fail_over_mac) {
  70                 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
  71                                           bond->params.fail_over_mac);
  72                 seq_printf(seq, " (fail_over_mac %s)", optval->string);
  73         }
  74
  75         seq_printf(seq, "\n");
  76
  77         if (bond_mode_uses_xmit_hash(bond)) {
  78                 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
  79                                           bond->params.xmit_policy);
  80                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  81                            optval->string, bond->params.xmit_policy);
  82         }
  83
  84         if (bond_uses_primary(bond)) {
  85                 primary = rcu_dereference(bond->primary_slave);
  86                 seq_printf(seq, "Primary Slave: %s",
  87                            primary ? primary->dev->name : "None");
  88                 if (primary) {
  89                         optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
  90                                                   bond->params.primary_reselect);
  91                         seq_printf(seq, " (primary_reselect %s)",
  92                                    optval->string);
  93                 }
  94
  95                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
  96                            (curr) ? curr->dev->name : "None");
  97         }
  98
  99         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
 100                    "up" : "down");
 101         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
 102         seq_printf(seq, "Up Delay (ms): %d\n",
 103                    bond->params.updelay * bond->params.miimon);
 104         seq_printf(seq, "Down Delay (ms): %d\n",
 105                    bond->params.downdelay * bond->params.miimon);
 106
 107
 108         /* ARP information */
 109         if (bond->params.arp_interval > 0) {
 110                 int printed = 0;
 111                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 112                                 bond->params.arp_interval);
 113
 114                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 115
 116                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 117                         if (!bond->params.arp_targets[i])
 118                                 break;
 119                         if (printed)
 120                                 seq_printf(seq, ",");
 121                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 122                         printed = 1;
 123                 }
 124                 seq_printf(seq, "\n");
 125         }
 126
 127         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 128                 struct ad_info ad_info;
 129
 130                 seq_puts(seq, "\n802.3ad info\n");
 131                 seq_printf(seq, "LACP rate: %s\n",
 132                            (bond->params.lacp_fast) ? "fast" : "slow");
 133                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 134                 optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
 135                                           bond->params.ad_select);
 136                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 137                            optval->string);
 138                 if (capable(CAP_NET_ADMIN)) {
 139                         seq_printf(seq, "System priority: %d\n",
 140                                    BOND_AD_INFO(bond).system.sys_priority);
 141                         seq_printf(seq, "System MAC address: %pM\n",
 142                                    &BOND_AD_INFO(bond).system.sys_mac_addr);
 143
 144                         if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 145                                 seq_printf(seq,
 146                                            "bond %s has no active aggregator\n",
 147                                            bond->dev->name);
 148                         } else {
 149                                 seq_printf(seq, "Active Aggregator Info:\n");
 150
 151                                 seq_printf(seq, "\tAggregator ID: %d\n",
 152                                            ad_info.aggregator_id);
 153                                 seq_printf(seq, "\tNumber of ports: %d\n",
 154                                            ad_info.ports);
 155                                 seq_printf(seq, "\tActor Key: %d\n",
 156                                            ad_info.actor_key);
 157                                 seq_printf(seq, "\tPartner Key: %d\n",
 158                                            ad_info.partner_key);
 159                                 seq_printf(seq, "\tPartner Mac Address: %pM\n",
 160                                            ad_info.partner_system);
 161                         }
 162                 }
 163         }
 164 }
 165
 166 static void bond_info_show_slave(struct seq_file *seq,
 167                                  const struct slave *slave)
 168 {
 169         struct bonding *bond = seq->private;
 170
 171         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 172         seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
 173         if (slave->speed == SPEED_UNKNOWN)
 174                 seq_printf(seq, "Speed: %s\n", "Unknown");
 175         else
 176                 seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 177
 178         if (slave->duplex == DUPLEX_UNKNOWN)
 179                 seq_printf(seq, "Duplex: %s\n", "Unknown");
 180         else
 181                 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 182
 183         seq_printf(seq, "Link Failure Count: %u\n",
 184                    slave->link_failure_count);
 185
 186         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
 187         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 188
 189         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 190                 const struct port *port = &SLAVE_AD_INFO(slave)->port;
 191                 const struct aggregator *agg = port->aggregator;
 192
 193                 if (agg) {
 194                         seq_printf(seq, "Aggregator ID: %d\n",
 195                                    agg->aggregator_identifier);
 196                         seq_printf(seq, "Actor Churn State: %s\n",
 197                                    bond_3ad_churn_desc(port->sm_churn_actor_state));
 198                         seq_printf(seq, "Partner Churn State: %s\n",
 199                                    bond_3ad_churn_desc(port->sm_churn_partner_state));
 200                         seq_printf(seq, "Actor Churned Count: %d\n",
 201                                    port->churn_actor_count);
 202                         seq_printf(seq, "Partner Churned Count: %d\n",
 203                                    port->churn_partner_count);
 204
 205                         if (capable(CAP_NET_ADMIN)) {
 206                                 seq_puts(seq, "details actor lacp pdu:\n");
 207                                 seq_printf(seq, "    system priority: %d\n",
 208                                            port->actor_system_priority);
 209                                 seq_printf(seq, "    system mac address: %pM\n",
 210                                            &port->actor_system);
 211                                 seq_printf(seq, "    port key: %d\n",
 212                                            port->actor_oper_port_key);
 213                                 seq_printf(seq, "    port priority: %d\n",
 214                                            port->actor_port_priority);
 215                                 seq_printf(seq, "    port number: %d\n",
 216                                            port->actor_port_number);
 217                                 seq_printf(seq, "    port state: %d\n",
 218                                            port->actor_oper_port_state);
 219
 220                                 seq_puts(seq, "details partner lacp pdu:\n");
 221                                 seq_printf(seq, "    system priority: %d\n",
 222                                            port->partner_oper.system_priority);
 223                                 seq_printf(seq, "    system mac address: %pM\n",
 224                                            &port->partner_oper.system);
 225                                 seq_printf(seq, "    oper key: %d\n",
 226                                            port->partner_oper.key);
 227                                 seq_printf(seq, "    port priority: %d\n",
 228                                            port->partner_oper.port_priority);
 229                                 seq_printf(seq, "    port number: %d\n",
 230                                            port->partner_oper.port_number);
 231                                 seq_printf(seq, "    port state: %d\n",
 232                                            port->partner_oper.port_state);
 233                         }
 234                 } else {
 235                         seq_puts(seq, "Aggregator ID: N/A\n");
 236                 }
 237         }
 238 }
 239
 240 static int bond_info_seq_show(struct seq_file *seq, void *v)
 241 {
 242         if (v == SEQ_START_TOKEN) {
 243                 seq_printf(seq, "%s\n", bond_version);
 244                 bond_info_show_master(seq);
 245         } else
 246                 bond_info_show_slave(seq, v);
 247
 248         return 0;
 249 }
 250
 251 static const struct seq_operations bond_info_seq_ops = {
 252         .start = bond_info_seq_start,
 253         .next  = bond_info_seq_next,
 254         .stop  = bond_info_seq_stop,
 255         .show  = bond_info_seq_show,
 256 };
 257
 258 static int bond_info_open(struct inode *inode, struct file *file)
 259 {
 260         struct seq_file *seq;
 261         int res;
 262
 263         res = seq_open(file, &bond_info_seq_ops);
 264         if (!res) {
 265                 /* recover the pointer buried in proc_dir_entry data */
 266                 seq = file->private_data;
 267                 seq->private = PDE_DATA(inode);
 268         }
 269
 270         return res;
 271 }
 272
 273 static const struct file_operations bond_info_fops = {
 274         .owner   = THIS_MODULE,
 275         .open    = bond_info_open,
 276         .read    = seq_read,
 277         .llseek  = seq_lseek,
 278         .release = seq_release,
 279 };
 280
 281 void bond_create_proc_entry(struct bonding *bond)
 282 {
 283         struct net_device *bond_dev = bond->dev;
 284         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 285
 286         if (bn->proc_dir) {
 287                 bond->proc_entry = proc_create_data(bond_dev->name,
 288                                                     S_IRUGO, bn->proc_dir,
 289                                                     &bond_info_fops, bond);
 290                 if (bond->proc_entry == NULL)
 291                         netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
 292                                     DRV_NAME, bond_dev->name);
 293                 else
 294                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 295         }
 296 }
 297
 298 void bond_remove_proc_entry(struct bonding *bond)
 299 {
 300         struct net_device *bond_dev = bond->dev;
 301         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 302
 303         if (bn->proc_dir && bond->proc_entry) {
 304                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 305                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 306                 bond->proc_entry = NULL;
 307         }
 308 }
 309
 310 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 311  * Caller must hold rtnl_lock.
 312  */
 313 void __net_init bond_create_proc_dir(struct bond_net *bn)
 314 {
 315         if (!bn->proc_dir) {
 316                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 317                 if (!bn->proc_dir)
 318                         pr_warn("Warning: Cannot create /proc/net/%s\n",
 319                                 DRV_NAME);
 320         }
 321 }
 322
 323 /* Destroy the bonding directory under /proc/net, if empty.
 324  * Caller must hold rtnl_lock.
 325  */
 326 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 327 {
 328         if (bn->proc_dir) {
 329                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 330                 bn->proc_dir = NULL;
 331         }
 332 }