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