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 = PDE_DATA(file_inode(seq->file));
  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 = PDE_DATA(file_inode(seq->file));
  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 = PDE_DATA(file_inode(seq->file));
  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         seq_printf(seq, "Peer Notification Delay (ms): %d\n",
 108                    bond->params.peer_notif_delay * bond->params.miimon);
 109
 110
 111         /* ARP information */
 112         if (bond->params.arp_interval > 0) {
 113                 int printed = 0;
 114                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 115                                 bond->params.arp_interval);
 116
 117                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 118
 119                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 120                         if (!bond->params.arp_targets[i])
 121                                 break;
 122                         if (printed)
 123                                 seq_printf(seq, ",");
 124                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 125                         printed = 1;
 126                 }
 127                 seq_printf(seq, "\n");
 128         }
 129
 130         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 131                 struct ad_info ad_info;
 132
 133                 seq_puts(seq, "\n802.3ad info\n");
 134                 seq_printf(seq, "LACP rate: %s\n",
 135                            (bond->params.lacp_fast) ? "fast" : "slow");
 136                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 137                 optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
 138                                           bond->params.ad_select);
 139                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 140                            optval->string);
 141                 if (capable(CAP_NET_ADMIN)) {
 142                         seq_printf(seq, "System priority: %d\n",
 143                                    BOND_AD_INFO(bond).system.sys_priority);
 144                         seq_printf(seq, "System MAC address: %pM\n",
 145                                    &BOND_AD_INFO(bond).system.sys_mac_addr);
 146
 147                         if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 148                                 seq_printf(seq,
 149                                            "bond %s has no active aggregator\n",
 150                                            bond->dev->name);
 151                         } else {
 152                                 seq_printf(seq, "Active Aggregator Info:\n");
 153
 154                                 seq_printf(seq, "\tAggregator ID: %d\n",
 155                                            ad_info.aggregator_id);
 156                                 seq_printf(seq, "\tNumber of ports: %d\n",
 157                                            ad_info.ports);
 158                                 seq_printf(seq, "\tActor Key: %d\n",
 159                                            ad_info.actor_key);
 160                                 seq_printf(seq, "\tPartner Key: %d\n",
 161                                            ad_info.partner_key);
 162                                 seq_printf(seq, "\tPartner Mac Address: %pM\n",
 163                                            ad_info.partner_system);
 164                         }
 165                 }
 166         }
 167 }
 168
 169 static void bond_info_show_slave(struct seq_file *seq,
 170                                  const struct slave *slave)
 171 {
 172         struct bonding *bond = PDE_DATA(file_inode(seq->file));
 173
 174         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 175         seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
 176         if (slave->speed == SPEED_UNKNOWN)
 177                 seq_printf(seq, "Speed: %s\n", "Unknown");
 178         else
 179                 seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 180
 181         if (slave->duplex == DUPLEX_UNKNOWN)
 182                 seq_printf(seq, "Duplex: %s\n", "Unknown");
 183         else
 184                 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 185
 186         seq_printf(seq, "Link Failure Count: %u\n",
 187                    slave->link_failure_count);
 188
 189         seq_printf(seq, "Permanent HW addr: %*phC\n",
 190                    slave->dev->addr_len, slave->perm_hwaddr);
 191         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 192
 193         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 194                 const struct port *port = &SLAVE_AD_INFO(slave)->port;
 195                 const struct aggregator *agg = port->aggregator;
 196
 197                 if (agg) {
 198                         seq_printf(seq, "Aggregator ID: %d\n",
 199                                    agg->aggregator_identifier);
 200                         seq_printf(seq, "Actor Churn State: %s\n",
 201                                    bond_3ad_churn_desc(port->sm_churn_actor_state));
 202                         seq_printf(seq, "Partner Churn State: %s\n",
 203                                    bond_3ad_churn_desc(port->sm_churn_partner_state));
 204                         seq_printf(seq, "Actor Churned Count: %d\n",
 205                                    port->churn_actor_count);
 206                         seq_printf(seq, "Partner Churned Count: %d\n",
 207                                    port->churn_partner_count);
 208
 209                         if (capable(CAP_NET_ADMIN)) {
 210                                 seq_puts(seq, "details actor lacp pdu:\n");
 211                                 seq_printf(seq, "    system priority: %d\n",
 212                                            port->actor_system_priority);
 213                                 seq_printf(seq, "    system mac address: %pM\n",
 214                                            &port->actor_system);
 215                                 seq_printf(seq, "    port key: %d\n",
 216                                            port->actor_oper_port_key);
 217                                 seq_printf(seq, "    port priority: %d\n",
 218                                            port->actor_port_priority);
 219                                 seq_printf(seq, "    port number: %d\n",
 220                                            port->actor_port_number);
 221                                 seq_printf(seq, "    port state: %d\n",
 222                                            port->actor_oper_port_state);
 223
 224                                 seq_puts(seq, "details partner lacp pdu:\n");
 225                                 seq_printf(seq, "    system priority: %d\n",
 226                                            port->partner_oper.system_priority);
 227                                 seq_printf(seq, "    system mac address: %pM\n",
 228                                            &port->partner_oper.system);
 229                                 seq_printf(seq, "    oper key: %d\n",
 230                                            port->partner_oper.key);
 231                                 seq_printf(seq, "    port priority: %d\n",
 232                                            port->partner_oper.port_priority);
 233                                 seq_printf(seq, "    port number: %d\n",
 234                                            port->partner_oper.port_number);
 235                                 seq_printf(seq, "    port state: %d\n",
 236                                            port->partner_oper.port_state);
 237                         }
 238                 } else {
 239                         seq_puts(seq, "Aggregator ID: N/A\n");
 240                 }
 241         }
 242 }
 243
 244 static int bond_info_seq_show(struct seq_file *seq, void *v)
 245 {
 246         if (v == SEQ_START_TOKEN) {
 247                 seq_printf(seq, "%s\n", bond_version);
 248                 bond_info_show_master(seq);
 249         } else
 250                 bond_info_show_slave(seq, v);
 251
 252         return 0;
 253 }
 254
 255 static const struct seq_operations bond_info_seq_ops = {
 256         .start = bond_info_seq_start,
 257         .next  = bond_info_seq_next,
 258         .stop  = bond_info_seq_stop,
 259         .show  = bond_info_seq_show,
 260 };
 261
 262 void bond_create_proc_entry(struct bonding *bond)
 263 {
 264         struct net_device *bond_dev = bond->dev;
 265         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 266
 267         if (bn->proc_dir) {
 268                 bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444,
 269                                 bn->proc_dir, &bond_info_seq_ops, bond);
 270                 if (bond->proc_entry == NULL)
 271                         netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
 272                                     DRV_NAME, bond_dev->name);
 273                 else
 274                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 275         }
 276 }
 277
 278 void bond_remove_proc_entry(struct bonding *bond)
 279 {
 280         struct net_device *bond_dev = bond->dev;
 281         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 282
 283         if (bn->proc_dir && bond->proc_entry) {
 284                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 285                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 286                 bond->proc_entry = NULL;
 287         }
 288 }
 289
 290 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 291  * Caller must hold rtnl_lock.
 292  */
 293 void __net_init bond_create_proc_dir(struct bond_net *bn)
 294 {
 295         if (!bn->proc_dir) {
 296                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 297                 if (!bn->proc_dir)
 298                         pr_warn("Warning: Cannot create /proc/net/%s\n",
 299                                 DRV_NAME);
 300         }
 301 }
 302
 303 /* Destroy the bonding directory under /proc/net, if empty.
 304  * Caller must hold rtnl_lock.
 305  */
 306 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 307 {
 308         if (bn->proc_dir) {
 309                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 310                 bn->proc_dir = NULL;
 311         }
 312 }