drivers/net/bonding/bond_procfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/proc_fs.h>
   3 #include <linux/ethtool.h>
   4 #include <linux/export.h>
   5 #include <net/net_namespace.h>
   6 #include <net/netns/generic.h>
   7 #include <net/bonding.h>
   8
   9 #include "bonding_priv.h"
  10
  11 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
  12         __acquires(RCU)
  13 {
  14         struct bonding *bond = PDE_DATA(file_inode(seq->file));
  15         struct list_head *iter;
  16         struct slave *slave;
  17         loff_t off = 0;
  18
  19         rcu_read_lock();
  20
  21         if (*pos == 0)
  22                 return SEQ_START_TOKEN;
  23
  24         bond_for_each_slave_rcu(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 = PDE_DATA(file_inode(seq->file));
  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_rcu(bond);
  41
  42         bond_for_each_slave_rcu(bond, slave, iter) {
  43                 if (found)
  44                         return slave;
  45                 if (slave == v)
  46                         found = true;
  47         }
  48
  49         return NULL;
  50 }
  51
  52 static void bond_info_seq_stop(struct seq_file *seq, void *v)
  53         __releases(RCU)
  54 {
  55         rcu_read_unlock();
  56 }
  57
  58 static void bond_info_show_master(struct seq_file *seq)
  59 {
  60         struct bonding *bond = PDE_DATA(file_inode(seq->file));
  61         const struct bond_opt_value *optval;
  62         struct slave *curr, *primary;
  63         int i;
  64
  65         curr = rcu_dereference(bond->curr_active_slave);
  66
  67         seq_printf(seq, "Bonding Mode: %s",
  68                    bond_mode_name(BOND_MODE(bond)));
  69
  70         if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
  71             bond->params.fail_over_mac) {
  72                 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
  73                                           bond->params.fail_over_mac);
  74                 seq_printf(seq, " (fail_over_mac %s)", optval->string);
  75         }
  76
  77         seq_printf(seq, "\n");
  78
  79         if (bond_mode_uses_xmit_hash(bond)) {
  80                 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
  81                                           bond->params.xmit_policy);
  82                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  83                            optval->string, bond->params.xmit_policy);
  84         }
  85
  86         if (bond_uses_primary(bond)) {
  87                 primary = rcu_dereference(bond->primary_slave);
  88                 seq_printf(seq, "Primary Slave: %s",
  89                            primary ? primary->dev->name : "None");
  90                 if (primary) {
  91                         optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
  92                                                   bond->params.primary_reselect);
  93                         seq_printf(seq, " (primary_reselect %s)",
  94                                    optval->string);
  95                 }
  96
  97                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
  98                            (curr) ? curr->dev->name : "None");
  99         }
 100
 101         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
 102                    "up" : "down");
 103         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
 104         seq_printf(seq, "Up Delay (ms): %d\n",
 105                    bond->params.updelay * bond->params.miimon);
 106         seq_printf(seq, "Down Delay (ms): %d\n",
 107                    bond->params.downdelay * bond->params.miimon);
 108         seq_printf(seq, "Peer Notification Delay (ms): %d\n",
 109                    bond->params.peer_notif_delay * bond->params.miimon);
 110
 111
 112         /* ARP information */
 113         if (bond->params.arp_interval > 0) {
 114                 int printed = 0;
 115
 116                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 117                                 bond->params.arp_interval);
 118
 119                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 120
 121                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 122                         if (!bond->params.arp_targets[i])
 123                                 break;
 124                         if (printed)
 125                                 seq_printf(seq, ",");
 126                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 127                         printed = 1;
 128                 }
 129                 seq_printf(seq, "\n");
 130         }
 131
 132         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 133                 struct ad_info ad_info;
 134
 135                 seq_puts(seq, "\n802.3ad info\n");
 136                 seq_printf(seq, "LACP rate: %s\n",
 137                            (bond->params.lacp_fast) ? "fast" : "slow");
 138                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 139                 optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
 140                                           bond->params.ad_select);
 141                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 142                            optval->string);
 143                 if (capable(CAP_NET_ADMIN)) {
 144                         seq_printf(seq, "System priority: %d\n",
 145                                    BOND_AD_INFO(bond).system.sys_priority);
 146                         seq_printf(seq, "System MAC address: %pM\n",
 147                                    &BOND_AD_INFO(bond).system.sys_mac_addr);
 148
 149                         if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 150                                 seq_printf(seq,
 151                                            "bond %s has no active aggregator\n",
 152                                            bond->dev->name);
 153                         } else {
 154                                 seq_printf(seq, "Active Aggregator Info:\n");
 155
 156                                 seq_printf(seq, "\tAggregator ID: %d\n",
 157                                            ad_info.aggregator_id);
 158                                 seq_printf(seq, "\tNumber of ports: %d\n",
 159                                            ad_info.ports);
 160                                 seq_printf(seq, "\tActor Key: %d\n",
 161                                            ad_info.actor_key);
 162                                 seq_printf(seq, "\tPartner Key: %d\n",
 163                                            ad_info.partner_key);
 164                                 seq_printf(seq, "\tPartner Mac Address: %pM\n",
 165                                            ad_info.partner_system);
 166                         }
 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 = PDE_DATA(file_inode(seq->file));
 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: %*phC\n",
 192                    slave->dev->addr_len, slave->perm_hwaddr);
 193         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 194
 195         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 196                 const struct port *port = &SLAVE_AD_INFO(slave)->port;
 197                 const struct aggregator *agg = port->aggregator;
 198
 199                 if (agg) {
 200                         seq_printf(seq, "Aggregator ID: %d\n",
 201                                    agg->aggregator_identifier);
 202                         seq_printf(seq, "Actor Churn State: %s\n",
 203                                    bond_3ad_churn_desc(port->sm_churn_actor_state));
 204                         seq_printf(seq, "Partner Churn State: %s\n",
 205                                    bond_3ad_churn_desc(port->sm_churn_partner_state));
 206                         seq_printf(seq, "Actor Churned Count: %d\n",
 207                                    port->churn_actor_count);
 208                         seq_printf(seq, "Partner Churned Count: %d\n",
 209                                    port->churn_partner_count);
 210
 211                         if (capable(CAP_NET_ADMIN)) {
 212                                 seq_puts(seq, "details actor lacp pdu:\n");
 213                                 seq_printf(seq, "    system priority: %d\n",
 214                                            port->actor_system_priority);
 215                                 seq_printf(seq, "    system mac address: %pM\n",
 216                                            &port->actor_system);
 217                                 seq_printf(seq, "    port key: %d\n",
 218                                            port->actor_oper_port_key);
 219                                 seq_printf(seq, "    port priority: %d\n",
 220                                            port->actor_port_priority);
 221                                 seq_printf(seq, "    port number: %d\n",
 222                                            port->actor_port_number);
 223                                 seq_printf(seq, "    port state: %d\n",
 224                                            port->actor_oper_port_state);
 225
 226                                 seq_puts(seq, "details partner lacp pdu:\n");
 227                                 seq_printf(seq, "    system priority: %d\n",
 228                                            port->partner_oper.system_priority);
 229                                 seq_printf(seq, "    system mac address: %pM\n",
 230                                            &port->partner_oper.system);
 231                                 seq_printf(seq, "    oper key: %d\n",
 232                                            port->partner_oper.key);
 233                                 seq_printf(seq, "    port priority: %d\n",
 234                                            port->partner_oper.port_priority);
 235                                 seq_printf(seq, "    port number: %d\n",
 236                                            port->partner_oper.port_number);
 237                                 seq_printf(seq, "    port state: %d\n",
 238                                            port->partner_oper.port_state);
 239                         }
 240                 } else {
 241                         seq_puts(seq, "Aggregator ID: N/A\n");
 242                 }
 243         }
 244 }
 245
 246 static int bond_info_seq_show(struct seq_file *seq, void *v)
 247 {
 248         if (v == SEQ_START_TOKEN) {
 249                 seq_printf(seq, "%s\n", bond_version);
 250                 bond_info_show_master(seq);
 251         } else
 252                 bond_info_show_slave(seq, v);
 253
 254         return 0;
 255 }
 256
 257 static const struct seq_operations bond_info_seq_ops = {
 258         .start = bond_info_seq_start,
 259         .next  = bond_info_seq_next,
 260         .stop  = bond_info_seq_stop,
 261         .show  = bond_info_seq_show,
 262 };
 263
 264 void bond_create_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) {
 270                 bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444,
 271                                 bn->proc_dir, &bond_info_seq_ops, bond);
 272                 if (bond->proc_entry == NULL)
 273                         netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
 274                                     DRV_NAME, bond_dev->name);
 275                 else
 276                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 277         }
 278 }
 279
 280 void bond_remove_proc_entry(struct bonding *bond)
 281 {
 282         struct net_device *bond_dev = bond->dev;
 283         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 284
 285         if (bn->proc_dir && bond->proc_entry) {
 286                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 287                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 288                 bond->proc_entry = NULL;
 289         }
 290 }
 291
 292 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 293  * Caller must hold rtnl_lock.
 294  */
 295 void __net_init bond_create_proc_dir(struct bond_net *bn)
 296 {
 297         if (!bn->proc_dir) {
 298                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 299                 if (!bn->proc_dir)
 300                         pr_warn("Warning: Cannot create /proc/net/%s\n",
 301                                 DRV_NAME);
 302         }
 303 }
 304
 305 /* Destroy the bonding directory under /proc/net, if empty.
 306  * Caller must hold rtnl_lock.
 307  */
 308 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 309 {
 310         if (bn->proc_dir) {
 311                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 312                 bn->proc_dir = NULL;
 313         }
 314 }