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 slave *curr;
  69         int i;
  70
  71         read_lock(&bond->curr_slave_lock);
  72         curr = bond->curr_active_slave;
  73         read_unlock(&bond->curr_slave_lock);
  74
  75         seq_printf(seq, "Bonding Mode: %s",
  76                    bond_mode_name(bond->params.mode));
  77
  78         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
  79             bond->params.fail_over_mac)
  80                 seq_printf(seq, " (fail_over_mac %s)",
  81                    fail_over_mac_tbl[bond->params.fail_over_mac].modename);
  82
  83         seq_printf(seq, "\n");
  84
  85         if (bond->params.mode == BOND_MODE_XOR ||
  86                 bond->params.mode == BOND_MODE_8023AD) {
  87                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  88                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
  89                         bond->params.xmit_policy);
  90         }
  91
  92         if (USES_PRIMARY(bond->params.mode)) {
  93                 seq_printf(seq, "Primary Slave: %s",
  94                            (bond->primary_slave) ?
  95                            bond->primary_slave->dev->name : "None");
  96                 if (bond->primary_slave)
  97                         seq_printf(seq, " (primary_reselect %s)",
  98                    pri_reselect_tbl[bond->params.primary_reselect].modename);
  99
 100                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
 101                            (curr) ? curr->dev->name : "None");
 102         }
 103
 104         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
 105                    "up" : "down");
 106         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
 107         seq_printf(seq, "Up Delay (ms): %d\n",
 108                    bond->params.updelay * bond->params.miimon);
 109         seq_printf(seq, "Down Delay (ms): %d\n",
 110                    bond->params.downdelay * bond->params.miimon);
 111
 112
 113         /* ARP information */
 114         if (bond->params.arp_interval > 0) {
 115                 int printed = 0;
 116                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 117                                 bond->params.arp_interval);
 118
 119                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 120
 121                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 122                         if (!bond->params.arp_targets[i])
 123                                 break;
 124                         if (printed)
 125                                 seq_printf(seq, ",");
 126                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 127                         printed = 1;
 128                 }
 129                 seq_printf(seq, "\n");
 130         }
 131
 132         if (bond->params.mode == BOND_MODE_8023AD) {
 133                 struct ad_info ad_info;
 134
 135                 seq_puts(seq, "\n802.3ad info\n");
 136                 seq_printf(seq, "LACP rate: %s\n",
 137                            (bond->params.lacp_fast) ? "fast" : "slow");
 138                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 139                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 140                            ad_select_tbl[bond->params.ad_select].modename);
 141
 142                 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
 143                         seq_printf(seq, "bond %s has no active aggregator\n",
 144                                    bond->dev->name);
 145                 } else {
 146                         seq_printf(seq, "Active Aggregator Info:\n");
 147
 148                         seq_printf(seq, "\tAggregator ID: %d\n",
 149                                    ad_info.aggregator_id);
 150                         seq_printf(seq, "\tNumber of ports: %d\n",
 151                                    ad_info.ports);
 152                         seq_printf(seq, "\tActor Key: %d\n",
 153                                    ad_info.actor_key);
 154                         seq_printf(seq, "\tPartner Key: %d\n",
 155                                    ad_info.partner_key);
 156                         seq_printf(seq, "\tPartner Mac Address: %pM\n",
 157                                    ad_info.partner_system);
 158                 }
 159         }
 160 }
 161
 162 static const char *bond_slave_link_status(s8 link)
 163 {
 164         static const char * const status[] = {
 165                 [BOND_LINK_UP] = "up",
 166                 [BOND_LINK_FAIL] = "going down",
 167                 [BOND_LINK_DOWN] = "down",
 168                 [BOND_LINK_BACK] = "going back",
 169         };
 170
 171         return status[link];
 172 }
 173
 174 static void bond_info_show_slave(struct seq_file *seq,
 175                                  const struct slave *slave)
 176 {
 177         struct bonding *bond = seq->private;
 178
 179         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 180         seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
 181         if (slave->speed == SPEED_UNKNOWN)
 182                 seq_printf(seq, "Speed: %s\n", "Unknown");
 183         else
 184                 seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 185
 186         if (slave->duplex == DUPLEX_UNKNOWN)
 187                 seq_printf(seq, "Duplex: %s\n", "Unknown");
 188         else
 189                 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 190
 191         seq_printf(seq, "Link Failure Count: %u\n",
 192                    slave->link_failure_count);
 193
 194         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
 195
 196         if (bond->params.mode == BOND_MODE_8023AD) {
 197                 const struct aggregator *agg
 198                         = SLAVE_AD_INFO(slave).port.aggregator;
 199
 200                 if (agg)
 201                         seq_printf(seq, "Aggregator ID: %d\n",
 202                                    agg->aggregator_identifier);
 203                 else
 204                         seq_puts(seq, "Aggregator ID: N/A\n");
 205         }
 206         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 207 }
 208
 209 static int bond_info_seq_show(struct seq_file *seq, void *v)
 210 {
 211         if (v == SEQ_START_TOKEN) {
 212                 seq_printf(seq, "%s\n", bond_version);
 213                 bond_info_show_master(seq);
 214         } else
 215                 bond_info_show_slave(seq, v);
 216
 217         return 0;
 218 }
 219
 220 static const struct seq_operations bond_info_seq_ops = {
 221         .start = bond_info_seq_start,
 222         .next  = bond_info_seq_next,
 223         .stop  = bond_info_seq_stop,
 224         .show  = bond_info_seq_show,
 225 };
 226
 227 static int bond_info_open(struct inode *inode, struct file *file)
 228 {
 229         struct seq_file *seq;
 230         int res;
 231
 232         res = seq_open(file, &bond_info_seq_ops);
 233         if (!res) {
 234                 /* recover the pointer buried in proc_dir_entry data */
 235                 seq = file->private_data;
 236                 seq->private = PDE_DATA(inode);
 237         }
 238
 239         return res;
 240 }
 241
 242 static const struct file_operations bond_info_fops = {
 243         .owner   = THIS_MODULE,
 244         .open    = bond_info_open,
 245         .read    = seq_read,
 246         .llseek  = seq_lseek,
 247         .release = seq_release,
 248 };
 249
 250 void bond_create_proc_entry(struct bonding *bond)
 251 {
 252         struct net_device *bond_dev = bond->dev;
 253         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 254
 255         if (bn->proc_dir) {
 256                 bond->proc_entry = proc_create_data(bond_dev->name,
 257                                                     S_IRUGO, bn->proc_dir,
 258                                                     &bond_info_fops, bond);
 259                 if (bond->proc_entry == NULL)
 260                         pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
 261                                    DRV_NAME, bond_dev->name);
 262                 else
 263                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 264         }
 265 }
 266
 267 void bond_remove_proc_entry(struct bonding *bond)
 268 {
 269         struct net_device *bond_dev = bond->dev;
 270         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 271
 272         if (bn->proc_dir && bond->proc_entry) {
 273                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 274                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 275                 bond->proc_entry = NULL;
 276         }
 277 }
 278
 279 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 280  * Caller must hold rtnl_lock.
 281  */
 282 void __net_init bond_create_proc_dir(struct bond_net *bn)
 283 {
 284         if (!bn->proc_dir) {
 285                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 286                 if (!bn->proc_dir)
 287                         pr_warning("Warning: cannot create /proc/net/%s\n",
 288                                    DRV_NAME);
 289         }
 290 }
 291
 292 /* Destroy the bonding directory under /proc/net, if empty.
 293  * Caller must hold rtnl_lock.
 294  */
 295 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 296 {
 297         if (bn->proc_dir) {
 298                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 299                 bn->proc_dir = NULL;
 300         }
 301 }