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 "bonding.h"
   6
   7
   8 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
   9         __acquires(RCU)
  10         __acquires(&bond->lock)
  11 {
  12         struct bonding *bond = seq->private;
  13         struct list_head *iter;
  14         struct slave *slave;
  15         loff_t off = 0;
  16
  17         /* make sure the bond won't be taken away */
  18         rcu_read_lock();
  19         read_lock(&bond->lock);
  20
  21         if (*pos == 0)
  22                 return SEQ_START_TOKEN;
  23
  24         bond_for_each_slave(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 = seq->private;
  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(bond);
  41
  42         if (bond_is_last_slave(bond, v))
  43                 return NULL;
  44
  45         bond_for_each_slave(bond, slave, iter) {
  46                 if (found)
  47                         return slave;
  48                 if (slave == v)
  49                         found = true;
  50         }
  51
  52         return NULL;
  53 }
  54
  55 static void bond_info_seq_stop(struct seq_file *seq, void *v)
  56         __releases(&bond->lock)
  57         __releases(RCU)
  58 {
  59         struct bonding *bond = seq->private;
  60
  61         read_unlock(&bond->lock);
  62         rcu_read_unlock();
  63 }
  64
  65 static void bond_info_show_master(struct seq_file *seq)
  66 {
  67         struct bonding *bond = seq->private;
  68         const struct bond_opt_value *optval;
  69         struct slave *curr;
  70         int i;
  71
  72         curr = rcu_dereference(bond->curr_active_slave);
  73
  74         seq_printf(seq, "Bonding Mode: %s",
  75                    bond_mode_name(bond->params.mode));
  76
  77         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
  78             bond->params.fail_over_mac) {
  79                 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
  80                                           bond->params.fail_over_mac);
  81                 seq_printf(seq, " (fail_over_mac %s)", optval->string);
  82         }
  83
  84         seq_printf(seq, "\n");
  85
  86         if (bond->params.mode == BOND_MODE_XOR ||
  87                 bond->params.mode == BOND_MODE_8023AD) {
  88                 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
  89                                           bond->params.xmit_policy);
  90                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  91                            optval->string, bond->params.xmit_policy);
  92         }
  93
  94         if (USES_PRIMARY(bond->params.mode)) {
  95                 seq_printf(seq, "Primary Slave: %s",
  96                            (bond->primary_slave) ?
  97                            bond->primary_slave->dev->name : "None");
  98                 if (bond->primary_slave) {
  99                         optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
 100                                                   bond->params.primary_reselect);
 101                         seq_printf(seq, " (primary_reselect %s)",
 102                                    optval->string);
 103                 }
 104
 105                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
 106                            (curr) ? curr->dev->name : "None");
 107         }
 108
 109         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
 110                    "up" : "down");
 111         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
 112         seq_printf(seq, "Up Delay (ms): %d\n",
 113                    bond->params.updelay * bond->params.miimon);
 114         seq_printf(seq, "Down Delay (ms): %d\n",
 115                    bond->params.downdelay * bond->params.miimon);
 116
 117
 118         /* ARP information */
 119         if (bond->params.arp_interval > 0) {
 120                 int printed = 0;
 121                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 122                                 bond->params.arp_interval);
 123
 124                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 125
 126                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 127                         if (!bond->params.arp_targets[i])
 128                                 break;
 129                         if (printed)
 130                                 seq_printf(seq, ",");
 131                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 132                         printed = 1;
 133                 }
 134                 seq_printf(seq, "\n");
 135         }
 136
 137         if (bond->params.mode == BOND_MODE_8023AD) {
 138                 struct ad_info ad_info;
 139
 140                 seq_puts(seq, "\n802.3ad info\n");
 141                 seq_printf(seq, "LACP rate: %s\n",
 142                            (bond->params.lacp_fast) ? "fast" : "slow");
 143                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 144                 optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
 145                                           bond->params.ad_select);
 146                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 147                            optval->string);
 148
 149                 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 150                         seq_printf(seq, "bond %s has no active aggregator\n",
 151                                    bond->dev->name);
 152                 } else {
 153                         seq_printf(seq, "Active Aggregator Info:\n");
 154
 155                         seq_printf(seq, "\tAggregator ID: %d\n",
 156                                    ad_info.aggregator_id);
 157                         seq_printf(seq, "\tNumber of ports: %d\n",
 158                                    ad_info.ports);
 159                         seq_printf(seq, "\tActor Key: %d\n",
 160                                    ad_info.actor_key);
 161                         seq_printf(seq, "\tPartner Key: %d\n",
 162                                    ad_info.partner_key);
 163                         seq_printf(seq, "\tPartner Mac Address: %pM\n",
 164                                    ad_info.partner_system);
 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 = seq->private;
 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: %pM\n", slave->perm_hwaddr);
 190
 191         if (bond->params.mode == BOND_MODE_8023AD) {
 192                 const struct aggregator *agg
 193                         = SLAVE_AD_INFO(slave).port.aggregator;
 194
 195                 if (agg)
 196                         seq_printf(seq, "Aggregator ID: %d\n",
 197                                    agg->aggregator_identifier);
 198                 else
 199                         seq_puts(seq, "Aggregator ID: N/A\n");
 200         }
 201         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 202 }
 203
 204 static int bond_info_seq_show(struct seq_file *seq, void *v)
 205 {
 206         if (v == SEQ_START_TOKEN) {
 207                 seq_printf(seq, "%s\n", bond_version);
 208                 bond_info_show_master(seq);
 209         } else
 210                 bond_info_show_slave(seq, v);
 211
 212         return 0;
 213 }
 214
 215 static const struct seq_operations bond_info_seq_ops = {
 216         .start = bond_info_seq_start,
 217         .next  = bond_info_seq_next,
 218         .stop  = bond_info_seq_stop,
 219         .show  = bond_info_seq_show,
 220 };
 221
 222 static int bond_info_open(struct inode *inode, struct file *file)
 223 {
 224         struct seq_file *seq;
 225         int res;
 226
 227         res = seq_open(file, &bond_info_seq_ops);
 228         if (!res) {
 229                 /* recover the pointer buried in proc_dir_entry data */
 230                 seq = file->private_data;
 231                 seq->private = PDE_DATA(inode);
 232         }
 233
 234         return res;
 235 }
 236
 237 static const struct file_operations bond_info_fops = {
 238         .owner   = THIS_MODULE,
 239         .open    = bond_info_open,
 240         .read    = seq_read,
 241         .llseek  = seq_lseek,
 242         .release = seq_release,
 243 };
 244
 245 void bond_create_proc_entry(struct bonding *bond)
 246 {
 247         struct net_device *bond_dev = bond->dev;
 248         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 249
 250         if (bn->proc_dir) {
 251                 bond->proc_entry = proc_create_data(bond_dev->name,
 252                                                     S_IRUGO, bn->proc_dir,
 253                                                     &bond_info_fops, bond);
 254                 if (bond->proc_entry == NULL)
 255                         pr_warn("Warning: Cannot create /proc/net/%s/%s\n",
 256                                 DRV_NAME, bond_dev->name);
 257                 else
 258                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 259         }
 260 }
 261
 262 void bond_remove_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 && bond->proc_entry) {
 268                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 269                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 270                 bond->proc_entry = NULL;
 271         }
 272 }
 273
 274 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 275  * Caller must hold rtnl_lock.
 276  */
 277 void __net_init bond_create_proc_dir(struct bond_net *bn)
 278 {
 279         if (!bn->proc_dir) {
 280                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 281                 if (!bn->proc_dir)
 282                         pr_warn("Warning: Cannot create /proc/net/%s\n",
 283                                 DRV_NAME);
 284         }
 285 }
 286
 287 /* Destroy the bonding directory under /proc/net, if empty.
 288  * Caller must hold rtnl_lock.
 289  */
 290 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 291 {
 292         if (bn->proc_dir) {
 293                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 294                 bn->proc_dir = NULL;
 295         }
 296 }