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         struct bond_opt_value *optval;
  69         struct slave *curr;
  70         int i;
  71
  72         read_lock(&bond->curr_slave_lock);
  73         curr = bond->curr_active_slave;
  74         read_unlock(&bond->curr_slave_lock);
  75
  76         seq_printf(seq, "Bonding Mode: %s",
  77                    bond_mode_name(bond->params.mode));
  78
  79         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
  80             bond->params.fail_over_mac) {
  81                 optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
  82                                           bond->params.fail_over_mac);
  83                 seq_printf(seq, " (fail_over_mac %s)", optval->string);
  84         }
  85
  86         seq_printf(seq, "\n");
  87
  88         if (bond->params.mode == BOND_MODE_XOR ||
  89                 bond->params.mode == BOND_MODE_8023AD) {
  90                 optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
  91                                           bond->params.xmit_policy);
  92                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  93                            optval->string, bond->params.xmit_policy);
  94         }
  95
  96         if (USES_PRIMARY(bond->params.mode)) {
  97                 seq_printf(seq, "Primary Slave: %s",
  98                            (bond->primary_slave) ?
  99                            bond->primary_slave->dev->name : "None");
 100                 if (bond->primary_slave) {
 101                         optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
 102                                                   bond->params.primary_reselect);
 103                         seq_printf(seq, " (primary_reselect %s)",
 104                                    optval->string);
 105                 }
 106
 107                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
 108                            (curr) ? curr->dev->name : "None");
 109         }
 110
 111         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
 112                    "up" : "down");
 113         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
 114         seq_printf(seq, "Up Delay (ms): %d\n",
 115                    bond->params.updelay * bond->params.miimon);
 116         seq_printf(seq, "Down Delay (ms): %d\n",
 117                    bond->params.downdelay * bond->params.miimon);
 118
 119
 120         /* ARP information */
 121         if (bond->params.arp_interval > 0) {
 122                 int printed = 0;
 123                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 124                                 bond->params.arp_interval);
 125
 126                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 127
 128                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 129                         if (!bond->params.arp_targets[i])
 130                                 break;
 131                         if (printed)
 132                                 seq_printf(seq, ",");
 133                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 134                         printed = 1;
 135                 }
 136                 seq_printf(seq, "\n");
 137         }
 138
 139         if (bond->params.mode == BOND_MODE_8023AD) {
 140                 struct ad_info ad_info;
 141
 142                 seq_puts(seq, "\n802.3ad info\n");
 143                 seq_printf(seq, "LACP rate: %s\n",
 144                            (bond->params.lacp_fast) ? "fast" : "slow");
 145                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 146                 optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
 147                                           bond->params.ad_select);
 148                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 149                            optval->string);
 150
 151                 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 152                         seq_printf(seq, "bond %s has no active aggregator\n",
 153                                    bond->dev->name);
 154                 } else {
 155                         seq_printf(seq, "Active Aggregator Info:\n");
 156
 157                         seq_printf(seq, "\tAggregator ID: %d\n",
 158                                    ad_info.aggregator_id);
 159                         seq_printf(seq, "\tNumber of ports: %d\n",
 160                                    ad_info.ports);
 161                         seq_printf(seq, "\tActor Key: %d\n",
 162                                    ad_info.actor_key);
 163                         seq_printf(seq, "\tPartner Key: %d\n",
 164                                    ad_info.partner_key);
 165                         seq_printf(seq, "\tPartner Mac Address: %pM\n",
 166                                    ad_info.partner_system);
 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 = seq->private;
 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: %pM\n", slave->perm_hwaddr);
 192
 193         if (bond->params.mode == BOND_MODE_8023AD) {
 194                 const struct aggregator *agg
 195                         = SLAVE_AD_INFO(slave).port.aggregator;
 196
 197                 if (agg)
 198                         seq_printf(seq, "Aggregator ID: %d\n",
 199                                    agg->aggregator_identifier);
 200                 else
 201                         seq_puts(seq, "Aggregator ID: N/A\n");
 202         }
 203         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 204 }
 205
 206 static int bond_info_seq_show(struct seq_file *seq, void *v)
 207 {
 208         if (v == SEQ_START_TOKEN) {
 209                 seq_printf(seq, "%s\n", bond_version);
 210                 bond_info_show_master(seq);
 211         } else
 212                 bond_info_show_slave(seq, v);
 213
 214         return 0;
 215 }
 216
 217 static const struct seq_operations bond_info_seq_ops = {
 218         .start = bond_info_seq_start,
 219         .next  = bond_info_seq_next,
 220         .stop  = bond_info_seq_stop,
 221         .show  = bond_info_seq_show,
 222 };
 223
 224 static int bond_info_open(struct inode *inode, struct file *file)
 225 {
 226         struct seq_file *seq;
 227         int res;
 228
 229         res = seq_open(file, &bond_info_seq_ops);
 230         if (!res) {
 231                 /* recover the pointer buried in proc_dir_entry data */
 232                 seq = file->private_data;
 233                 seq->private = PDE_DATA(inode);
 234         }
 235
 236         return res;
 237 }
 238
 239 static const struct file_operations bond_info_fops = {
 240         .owner   = THIS_MODULE,
 241         .open    = bond_info_open,
 242         .read    = seq_read,
 243         .llseek  = seq_lseek,
 244         .release = seq_release,
 245 };
 246
 247 void bond_create_proc_entry(struct bonding *bond)
 248 {
 249         struct net_device *bond_dev = bond->dev;
 250         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 251
 252         if (bn->proc_dir) {
 253                 bond->proc_entry = proc_create_data(bond_dev->name,
 254                                                     S_IRUGO, bn->proc_dir,
 255                                                     &bond_info_fops, bond);
 256                 if (bond->proc_entry == NULL)
 257                         pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
 258                                    DRV_NAME, bond_dev->name);
 259                 else
 260                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 261         }
 262 }
 263
 264 void bond_remove_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 && bond->proc_entry) {
 270                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 271                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 272                 bond->proc_entry = NULL;
 273         }
 274 }
 275
 276 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 277  * Caller must hold rtnl_lock.
 278  */
 279 void __net_init bond_create_proc_dir(struct bond_net *bn)
 280 {
 281         if (!bn->proc_dir) {
 282                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 283                 if (!bn->proc_dir)
 284                         pr_warning("Warning: cannot create /proc/net/%s\n",
 285                                    DRV_NAME);
 286         }
 287 }
 288
 289 /* Destroy the bonding directory under /proc/net, if empty.
 290  * Caller must hold rtnl_lock.
 291  */
 292 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 293 {
 294         if (bn->proc_dir) {
 295                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 296                 bn->proc_dir = NULL;
 297         }
 298 }