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                         seq_printf(seq, " (primary_reselect %s)",
 102                    pri_reselect_tbl[bond->params.primary_reselect].modename);
 103
 104                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
 105                            (curr) ? curr->dev->name : "None");
 106         }
 107
 108         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
 109                    "up" : "down");
 110         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
 111         seq_printf(seq, "Up Delay (ms): %d\n",
 112                    bond->params.updelay * bond->params.miimon);
 113         seq_printf(seq, "Down Delay (ms): %d\n",
 114                    bond->params.downdelay * bond->params.miimon);
 115
 116
 117         /* ARP information */
 118         if (bond->params.arp_interval > 0) {
 119                 int printed = 0;
 120                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 121                                 bond->params.arp_interval);
 122
 123                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 124
 125                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 126                         if (!bond->params.arp_targets[i])
 127                                 break;
 128                         if (printed)
 129                                 seq_printf(seq, ",");
 130                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 131                         printed = 1;
 132                 }
 133                 seq_printf(seq, "\n");
 134         }
 135
 136         if (bond->params.mode == BOND_MODE_8023AD) {
 137                 struct ad_info ad_info;
 138
 139                 seq_puts(seq, "\n802.3ad info\n");
 140                 seq_printf(seq, "LACP rate: %s\n",
 141                            (bond->params.lacp_fast) ? "fast" : "slow");
 142                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 143                 optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
 144                                           bond->params.ad_select);
 145                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 146                            optval->string);
 147
 148                 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 149                         seq_printf(seq, "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 static void bond_info_show_slave(struct seq_file *seq,
 169                                  const struct slave *slave)
 170 {
 171         struct bonding *bond = seq->private;
 172
 173         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 174         seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
 175         if (slave->speed == SPEED_UNKNOWN)
 176                 seq_printf(seq, "Speed: %s\n", "Unknown");
 177         else
 178                 seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 179
 180         if (slave->duplex == DUPLEX_UNKNOWN)
 181                 seq_printf(seq, "Duplex: %s\n", "Unknown");
 182         else
 183                 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 184
 185         seq_printf(seq, "Link Failure Count: %u\n",
 186                    slave->link_failure_count);
 187
 188         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
 189
 190         if (bond->params.mode == BOND_MODE_8023AD) {
 191                 const struct aggregator *agg
 192                         = SLAVE_AD_INFO(slave).port.aggregator;
 193
 194                 if (agg)
 195                         seq_printf(seq, "Aggregator ID: %d\n",
 196                                    agg->aggregator_identifier);
 197                 else
 198                         seq_puts(seq, "Aggregator ID: N/A\n");
 199         }
 200         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 201 }
 202
 203 static int bond_info_seq_show(struct seq_file *seq, void *v)
 204 {
 205         if (v == SEQ_START_TOKEN) {
 206                 seq_printf(seq, "%s\n", bond_version);
 207                 bond_info_show_master(seq);
 208         } else
 209                 bond_info_show_slave(seq, v);
 210
 211         return 0;
 212 }
 213
 214 static const struct seq_operations bond_info_seq_ops = {
 215         .start = bond_info_seq_start,
 216         .next  = bond_info_seq_next,
 217         .stop  = bond_info_seq_stop,
 218         .show  = bond_info_seq_show,
 219 };
 220
 221 static int bond_info_open(struct inode *inode, struct file *file)
 222 {
 223         struct seq_file *seq;
 224         int res;
 225
 226         res = seq_open(file, &bond_info_seq_ops);
 227         if (!res) {
 228                 /* recover the pointer buried in proc_dir_entry data */
 229                 seq = file->private_data;
 230                 seq->private = PDE_DATA(inode);
 231         }
 232
 233         return res;
 234 }
 235
 236 static const struct file_operations bond_info_fops = {
 237         .owner   = THIS_MODULE,
 238         .open    = bond_info_open,
 239         .read    = seq_read,
 240         .llseek  = seq_lseek,
 241         .release = seq_release,
 242 };
 243
 244 void bond_create_proc_entry(struct bonding *bond)
 245 {
 246         struct net_device *bond_dev = bond->dev;
 247         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 248
 249         if (bn->proc_dir) {
 250                 bond->proc_entry = proc_create_data(bond_dev->name,
 251                                                     S_IRUGO, bn->proc_dir,
 252                                                     &bond_info_fops, bond);
 253                 if (bond->proc_entry == NULL)
 254                         pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
 255                                    DRV_NAME, bond_dev->name);
 256                 else
 257                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 258         }
 259 }
 260
 261 void bond_remove_proc_entry(struct bonding *bond)
 262 {
 263         struct net_device *bond_dev = bond->dev;
 264         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 265
 266         if (bn->proc_dir && bond->proc_entry) {
 267                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 268                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 269                 bond->proc_entry = NULL;
 270         }
 271 }
 272
 273 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 274  * Caller must hold rtnl_lock.
 275  */
 276 void __net_init bond_create_proc_dir(struct bond_net *bn)
 277 {
 278         if (!bn->proc_dir) {
 279                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 280                 if (!bn->proc_dir)
 281                         pr_warning("Warning: cannot create /proc/net/%s\n",
 282                                    DRV_NAME);
 283         }
 284 }
 285
 286 /* Destroy the bonding directory under /proc/net, if empty.
 287  * Caller must hold rtnl_lock.
 288  */
 289 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 290 {
 291         if (bn->proc_dir) {
 292                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 293                 bn->proc_dir = NULL;
 294         }
 295 }