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
 139                 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 140                         seq_printf(seq, "bond %s has no active aggregator\n",
 141                                    bond->dev->name);
 142                 } else {
 143                         seq_printf(seq, "Active Aggregator Info:\n");
 144
 145                         seq_printf(seq, "\tAggregator ID: %d\n",
 146                                    ad_info.aggregator_id);
 147                         seq_printf(seq, "\tNumber of ports: %d\n",
 148                                    ad_info.ports);
 149                         seq_printf(seq, "\tActor Key: %d\n",
 150                                    ad_info.actor_key);
 151                         seq_printf(seq, "\tPartner Key: %d\n",
 152                                    ad_info.partner_key);
 153                         seq_printf(seq, "\tPartner Mac Address: %pM\n",
 154                                    ad_info.partner_system);
 155                 }
 156         }
 157 }
 158
 159 static void bond_info_show_slave(struct seq_file *seq,
 160                                  const struct slave *slave)
 161 {
 162         struct bonding *bond = seq->private;
 163
 164         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 165         seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
 166         if (slave->speed == SPEED_UNKNOWN)
 167                 seq_printf(seq, "Speed: %s\n", "Unknown");
 168         else
 169                 seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 170
 171         if (slave->duplex == DUPLEX_UNKNOWN)
 172                 seq_printf(seq, "Duplex: %s\n", "Unknown");
 173         else
 174                 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 175
 176         seq_printf(seq, "Link Failure Count: %u\n",
 177                    slave->link_failure_count);
 178
 179         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
 180         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 181
 182         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 183                 const struct port *port = &SLAVE_AD_INFO(slave)->port;
 184                 const struct aggregator *agg = port->aggregator;
 185
 186                 if (agg) {
 187                         seq_printf(seq, "Aggregator ID: %d\n",
 188                                    agg->aggregator_identifier);
 189                         seq_printf(seq, "Actor Churn State: %s\n",
 190                                    bond_3ad_churn_desc(port->sm_churn_actor_state));
 191                         seq_printf(seq, "Partner Churn State: %s\n",
 192                                    bond_3ad_churn_desc(port->sm_churn_partner_state));
 193                         seq_printf(seq, "Actor Churned Count: %d\n",
 194                                    port->churn_actor_count);
 195                         seq_printf(seq, "Partner Churned Count: %d\n",
 196                                    port->churn_partner_count);
 197
 198                         seq_puts(seq, "details actor lacp pdu:\n");
 199                         seq_printf(seq, "    system priority: %d\n",
 200                                    port->actor_system_priority);
 201                         seq_printf(seq, "    port key: %d\n",
 202                                    port->actor_oper_port_key);
 203                         seq_printf(seq, "    port priority: %d\n",
 204                                    port->actor_port_priority);
 205                         seq_printf(seq, "    port number: %d\n",
 206                                    port->actor_port_number);
 207                         seq_printf(seq, "    port state: %d\n",
 208                                    port->actor_oper_port_state);
 209
 210                         seq_puts(seq, "details partner lacp pdu:\n");
 211                         seq_printf(seq, "    system priority: %d\n",
 212                                    port->partner_oper.system_priority);
 213                         seq_printf(seq, "    oper key: %d\n",
 214                                    port->partner_oper.key);
 215                         seq_printf(seq, "    port priority: %d\n",
 216                                    port->partner_oper.port_priority);
 217                         seq_printf(seq, "    port number: %d\n",
 218                                    port->partner_oper.port_number);
 219                         seq_printf(seq, "    port state: %d\n",
 220                                    port->partner_oper.port_state);
 221                 } else {
 222                         seq_puts(seq, "Aggregator ID: N/A\n");
 223                 }
 224         }
 225 }
 226
 227 static int bond_info_seq_show(struct seq_file *seq, void *v)
 228 {
 229         if (v == SEQ_START_TOKEN) {
 230                 seq_printf(seq, "%s\n", bond_version);
 231                 bond_info_show_master(seq);
 232         } else
 233                 bond_info_show_slave(seq, v);
 234
 235         return 0;
 236 }
 237
 238 static const struct seq_operations bond_info_seq_ops = {
 239         .start = bond_info_seq_start,
 240         .next  = bond_info_seq_next,
 241         .stop  = bond_info_seq_stop,
 242         .show  = bond_info_seq_show,
 243 };
 244
 245 static int bond_info_open(struct inode *inode, struct file *file)
 246 {
 247         struct seq_file *seq;
 248         int res;
 249
 250         res = seq_open(file, &bond_info_seq_ops);
 251         if (!res) {
 252                 /* recover the pointer buried in proc_dir_entry data */
 253                 seq = file->private_data;
 254                 seq->private = PDE_DATA(inode);
 255         }
 256
 257         return res;
 258 }
 259
 260 static const struct file_operations bond_info_fops = {
 261         .owner   = THIS_MODULE,
 262         .open    = bond_info_open,
 263         .read    = seq_read,
 264         .llseek  = seq_lseek,
 265         .release = seq_release,
 266 };
 267
 268 void bond_create_proc_entry(struct bonding *bond)
 269 {
 270         struct net_device *bond_dev = bond->dev;
 271         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 272
 273         if (bn->proc_dir) {
 274                 bond->proc_entry = proc_create_data(bond_dev->name,
 275                                                     S_IRUGO, bn->proc_dir,
 276                                                     &bond_info_fops, bond);
 277                 if (bond->proc_entry == NULL)
 278                         netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
 279                                     DRV_NAME, bond_dev->name);
 280                 else
 281                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 282         }
 283 }
 284
 285 void bond_remove_proc_entry(struct bonding *bond)
 286 {
 287         struct net_device *bond_dev = bond->dev;
 288         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 289
 290         if (bn->proc_dir && bond->proc_entry) {
 291                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 292                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 293                 bond->proc_entry = NULL;
 294         }
 295 }
 296
 297 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 298  * Caller must hold rtnl_lock.
 299  */
 300 void __net_init bond_create_proc_dir(struct bond_net *bn)
 301 {
 302         if (!bn->proc_dir) {
 303                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 304                 if (!bn->proc_dir)
 305                         pr_warn("Warning: Cannot create /proc/net/%s\n",
 306                                 DRV_NAME);
 307         }
 308 }
 309
 310 /* Destroy the bonding directory under /proc/net, if empty.
 311  * Caller must hold rtnl_lock.
 312  */
 313 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 314 {
 315         if (bn->proc_dir) {
 316                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 317                 bn->proc_dir = NULL;
 318         }
 319 }