drivers/net/bonding/bond_procfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/proc_fs.h>
   3 #include <linux/export.h>
   4 #include <net/net_namespace.h>
   5 #include <net/netns/generic.h>
   6 #include <net/bonding.h>
   7
   8 #include "bonding_priv.h"
   9
  10 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
  11         __acquires(RCU)
  12 {
  13         struct bonding *bond = seq->private;
  14         struct list_head *iter;
  15         struct slave *slave;
  16         loff_t off = 0;
  17
  18         rcu_read_lock();
  19
  20         if (*pos == 0)
  21                 return SEQ_START_TOKEN;
  22
  23         bond_for_each_slave_rcu(bond, slave, iter)
  24                 if (++off == *pos)
  25                         return slave;
  26
  27         return NULL;
  28 }
  29
  30 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  31 {
  32         struct bonding *bond = seq->private;
  33         struct list_head *iter;
  34         struct slave *slave;
  35         bool found = false;
  36
  37         ++*pos;
  38         if (v == SEQ_START_TOKEN)
  39                 return bond_first_slave_rcu(bond);
  40
  41         bond_for_each_slave_rcu(bond, slave, iter) {
  42                 if (found)
  43                         return slave;
  44                 if (slave == v)
  45                         found = true;
  46         }
  47
  48         return NULL;
  49 }
  50
  51 static void bond_info_seq_stop(struct seq_file *seq, void *v)
  52         __releases(RCU)
  53 {
  54         rcu_read_unlock();
  55 }
  56
  57 static void bond_info_show_master(struct seq_file *seq)
  58 {
  59         struct bonding *bond = seq->private;
  60         const struct bond_opt_value *optval;
  61         struct slave *curr, *primary;
  62         int i;
  63
  64         curr = rcu_dereference(bond->curr_active_slave);
  65
  66         seq_printf(seq, "Bonding Mode: %s",
  67                    bond_mode_name(BOND_MODE(bond)));
  68
  69         if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
  70             bond->params.fail_over_mac) {
  71                 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
  72                                           bond->params.fail_over_mac);
  73                 seq_printf(seq, " (fail_over_mac %s)", optval->string);
  74         }
  75
  76         seq_printf(seq, "\n");
  77
  78         if (bond_mode_uses_xmit_hash(bond)) {
  79                 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
  80                                           bond->params.xmit_policy);
  81                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  82                            optval->string, bond->params.xmit_policy);
  83         }
  84
  85         if (bond_uses_primary(bond)) {
  86                 primary = rcu_dereference(bond->primary_slave);
  87                 seq_printf(seq, "Primary Slave: %s",
  88                            primary ? primary->dev->name : "None");
  89                 if (primary) {
  90                         optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
  91                                                   bond->params.primary_reselect);
  92                         seq_printf(seq, " (primary_reselect %s)",
  93                                    optval->string);
  94                 }
  95
  96                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
  97                            (curr) ? curr->dev->name : "None");
  98         }
  99
 100         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
 101                    "up" : "down");
 102         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
 103         seq_printf(seq, "Up Delay (ms): %d\n",
 104                    bond->params.updelay * bond->params.miimon);
 105         seq_printf(seq, "Down Delay (ms): %d\n",
 106                    bond->params.downdelay * bond->params.miimon);
 107
 108
 109         /* ARP information */
 110         if (bond->params.arp_interval > 0) {
 111                 int printed = 0;
 112                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 113                                 bond->params.arp_interval);
 114
 115                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 116
 117                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 118                         if (!bond->params.arp_targets[i])
 119                                 break;
 120                         if (printed)
 121                                 seq_printf(seq, ",");
 122                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 123                         printed = 1;
 124                 }
 125                 seq_printf(seq, "\n");
 126         }
 127
 128         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 129                 struct ad_info ad_info;
 130
 131                 seq_puts(seq, "\n802.3ad info\n");
 132                 seq_printf(seq, "LACP rate: %s\n",
 133                            (bond->params.lacp_fast) ? "fast" : "slow");
 134                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 135                 optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
 136                                           bond->params.ad_select);
 137                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 138                            optval->string);
 139                 if (capable(CAP_NET_ADMIN)) {
 140                         seq_printf(seq, "System priority: %d\n",
 141                                    BOND_AD_INFO(bond).system.sys_priority);
 142                         seq_printf(seq, "System MAC address: %pM\n",
 143                                    &BOND_AD_INFO(bond).system.sys_mac_addr);
 144
 145                         if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 146                                 seq_printf(seq,
 147                                            "bond %s has no active aggregator\n",
 148                                            bond->dev->name);
 149                         } else {
 150                                 seq_printf(seq, "Active Aggregator Info:\n");
 151
 152                                 seq_printf(seq, "\tAggregator ID: %d\n",
 153                                            ad_info.aggregator_id);
 154                                 seq_printf(seq, "\tNumber of ports: %d\n",
 155                                            ad_info.ports);
 156                                 seq_printf(seq, "\tActor Key: %d\n",
 157                                            ad_info.actor_key);
 158                                 seq_printf(seq, "\tPartner Key: %d\n",
 159                                            ad_info.partner_key);
 160                                 seq_printf(seq, "\tPartner Mac Address: %pM\n",
 161                                            ad_info.partner_system);
 162                         }
 163                 }
 164         }
 165 }
 166
 167 static void bond_info_show_slave(struct seq_file *seq,
 168                                  const struct slave *slave)
 169 {
 170         struct bonding *bond = seq->private;
 171
 172         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 173         seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
 174         if (slave->speed == SPEED_UNKNOWN)
 175                 seq_printf(seq, "Speed: %s\n", "Unknown");
 176         else
 177                 seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 178
 179         if (slave->duplex == DUPLEX_UNKNOWN)
 180                 seq_printf(seq, "Duplex: %s\n", "Unknown");
 181         else
 182                 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 183
 184         seq_printf(seq, "Link Failure Count: %u\n",
 185                    slave->link_failure_count);
 186
 187         seq_printf(seq, "Permanent HW addr: %*phC\n",
 188                    slave->dev->addr_len, slave->perm_hwaddr);
 189         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 190
 191         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 192                 const struct port *port = &SLAVE_AD_INFO(slave)->port;
 193                 const struct aggregator *agg = port->aggregator;
 194
 195                 if (agg) {
 196                         seq_printf(seq, "Aggregator ID: %d\n",
 197                                    agg->aggregator_identifier);
 198                         seq_printf(seq, "Actor Churn State: %s\n",
 199                                    bond_3ad_churn_desc(port->sm_churn_actor_state));
 200                         seq_printf(seq, "Partner Churn State: %s\n",
 201                                    bond_3ad_churn_desc(port->sm_churn_partner_state));
 202                         seq_printf(seq, "Actor Churned Count: %d\n",
 203                                    port->churn_actor_count);
 204                         seq_printf(seq, "Partner Churned Count: %d\n",
 205                                    port->churn_partner_count);
 206
 207                         if (capable(CAP_NET_ADMIN)) {
 208                                 seq_puts(seq, "details actor lacp pdu:\n");
 209                                 seq_printf(seq, "    system priority: %d\n",
 210                                            port->actor_system_priority);
 211                                 seq_printf(seq, "    system mac address: %pM\n",
 212                                            &port->actor_system);
 213                                 seq_printf(seq, "    port key: %d\n",
 214                                            port->actor_oper_port_key);
 215                                 seq_printf(seq, "    port priority: %d\n",
 216                                            port->actor_port_priority);
 217                                 seq_printf(seq, "    port number: %d\n",
 218                                            port->actor_port_number);
 219                                 seq_printf(seq, "    port state: %d\n",
 220                                            port->actor_oper_port_state);
 221
 222                                 seq_puts(seq, "details partner lacp pdu:\n");
 223                                 seq_printf(seq, "    system priority: %d\n",
 224                                            port->partner_oper.system_priority);
 225                                 seq_printf(seq, "    system mac address: %pM\n",
 226                                            &port->partner_oper.system);
 227                                 seq_printf(seq, "    oper key: %d\n",
 228                                            port->partner_oper.key);
 229                                 seq_printf(seq, "    port priority: %d\n",
 230                                            port->partner_oper.port_priority);
 231                                 seq_printf(seq, "    port number: %d\n",
 232                                            port->partner_oper.port_number);
 233                                 seq_printf(seq, "    port state: %d\n",
 234                                            port->partner_oper.port_state);
 235                         }
 236                 } else {
 237                         seq_puts(seq, "Aggregator ID: N/A\n");
 238                 }
 239         }
 240 }
 241
 242 static int bond_info_seq_show(struct seq_file *seq, void *v)
 243 {
 244         if (v == SEQ_START_TOKEN) {
 245                 seq_printf(seq, "%s\n", bond_version);
 246                 bond_info_show_master(seq);
 247         } else
 248                 bond_info_show_slave(seq, v);
 249
 250         return 0;
 251 }
 252
 253 static const struct seq_operations bond_info_seq_ops = {
 254         .start = bond_info_seq_start,
 255         .next  = bond_info_seq_next,
 256         .stop  = bond_info_seq_stop,
 257         .show  = bond_info_seq_show,
 258 };
 259
 260 static int bond_info_open(struct inode *inode, struct file *file)
 261 {
 262         struct seq_file *seq;
 263         int res;
 264
 265         res = seq_open(file, &bond_info_seq_ops);
 266         if (!res) {
 267                 /* recover the pointer buried in proc_dir_entry data */
 268                 seq = file->private_data;
 269                 seq->private = PDE_DATA(inode);
 270         }
 271
 272         return res;
 273 }
 274
 275 static const struct file_operations bond_info_fops = {
 276         .owner   = THIS_MODULE,
 277         .open    = bond_info_open,
 278         .read    = seq_read,
 279         .llseek  = seq_lseek,
 280         .release = seq_release,
 281 };
 282
 283 void bond_create_proc_entry(struct bonding *bond)
 284 {
 285         struct net_device *bond_dev = bond->dev;
 286         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 287
 288         if (bn->proc_dir) {
 289                 bond->proc_entry = proc_create_data(bond_dev->name,
 290                                                     S_IRUGO, bn->proc_dir,
 291                                                     &bond_info_fops, bond);
 292                 if (bond->proc_entry == NULL)
 293                         netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
 294                                     DRV_NAME, bond_dev->name);
 295                 else
 296                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 297         }
 298 }
 299
 300 void bond_remove_proc_entry(struct bonding *bond)
 301 {
 302         struct net_device *bond_dev = bond->dev;
 303         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 304
 305         if (bn->proc_dir && bond->proc_entry) {
 306                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 307                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 308                 bond->proc_entry = NULL;
 309         }
 310 }
 311
 312 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 313  * Caller must hold rtnl_lock.
 314  */
 315 void __net_init bond_create_proc_dir(struct bond_net *bn)
 316 {
 317         if (!bn->proc_dir) {
 318                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 319                 if (!bn->proc_dir)
 320                         pr_warn("Warning: Cannot create /proc/net/%s\n",
 321                                 DRV_NAME);
 322         }
 323 }
 324
 325 /* Destroy the bonding directory under /proc/net, if empty.
 326  * Caller must hold rtnl_lock.
 327  */
 328 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 329 {
 330         if (bn->proc_dir) {
 331                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 332                 bn->proc_dir = NULL;
 333         }
 334 }