drivers/net/bonding/bond_procfs.c

   1 #include <linux/proc_fs.h>
   2 #include <net/net_namespace.h>
   3 #include <net/netns/generic.h>
   4 #include "bonding.h"
   5
   6
   7 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
   8         __acquires(RCU)
   9         __acquires(&bond->lock)
  10 {
  11         struct bonding *bond = seq->private;
  12         loff_t off = 0;
  13         struct slave *slave;
  14         int i;
  15
  16         /* make sure the bond won't be taken away */
  17         rcu_read_lock();
  18         read_lock(&bond->lock);
  19
  20         if (*pos == 0)
  21                 return SEQ_START_TOKEN;
  22
  23         bond_for_each_slave(bond, slave, i) {
  24                 if (++off == *pos)
  25                         return slave;
  26         }
  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 slave *slave = v;
  35
  36         ++*pos;
  37         if (v == SEQ_START_TOKEN)
  38                 return bond->first_slave;
  39
  40         slave = slave->next;
  41
  42         return (slave == bond->first_slave) ? NULL : slave;
  43 }
  44
  45 static void bond_info_seq_stop(struct seq_file *seq, void *v)
  46         __releases(&bond->lock)
  47         __releases(RCU)
  48 {
  49         struct bonding *bond = seq->private;
  50
  51         read_unlock(&bond->lock);
  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         struct slave *curr;
  59         int i;
  60
  61         read_lock(&bond->curr_slave_lock);
  62         curr = bond->curr_active_slave;
  63         read_unlock(&bond->curr_slave_lock);
  64
  65         seq_printf(seq, "Bonding Mode: %s",
  66                    bond_mode_name(bond->params.mode));
  67
  68         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
  69             bond->params.fail_over_mac)
  70                 seq_printf(seq, " (fail_over_mac %s)",
  71                    fail_over_mac_tbl[bond->params.fail_over_mac].modename);
  72
  73         seq_printf(seq, "\n");
  74
  75         if (bond->params.mode == BOND_MODE_XOR ||
  76                 bond->params.mode == BOND_MODE_8023AD) {
  77                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  78                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
  79                         bond->params.xmit_policy);
  80         }
  81
  82         if (USES_PRIMARY(bond->params.mode)) {
  83                 seq_printf(seq, "Primary Slave: %s",
  84                            (bond->primary_slave) ?
  85                            bond->primary_slave->dev->name : "None");
  86                 if (bond->primary_slave)
  87                         seq_printf(seq, " (primary_reselect %s)",
  88                    pri_reselect_tbl[bond->params.primary_reselect].modename);
  89
  90                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
  91                            (curr) ? curr->dev->name : "None");
  92         }
  93
  94         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
  95                    "up" : "down");
  96         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
  97         seq_printf(seq, "Up Delay (ms): %d\n",
  98                    bond->params.updelay * bond->params.miimon);
  99         seq_printf(seq, "Down Delay (ms): %d\n",
 100                    bond->params.downdelay * bond->params.miimon);
 101
 102
 103         /* ARP information */
 104         if (bond->params.arp_interval > 0) {
 105                 int printed = 0;
 106                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 107                                 bond->params.arp_interval);
 108
 109                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 110
 111                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 112                         if (!bond->params.arp_targets[i])
 113                                 break;
 114                         if (printed)
 115                                 seq_printf(seq, ",");
 116                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 117                         printed = 1;
 118                 }
 119                 seq_printf(seq, "\n");
 120         }
 121
 122         if (bond->params.mode == BOND_MODE_8023AD) {
 123                 struct ad_info ad_info;
 124
 125                 seq_puts(seq, "\n802.3ad info\n");
 126                 seq_printf(seq, "LACP rate: %s\n",
 127                            (bond->params.lacp_fast) ? "fast" : "slow");
 128                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 129                            ad_select_tbl[bond->params.ad_select].modename);
 130
 131                 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
 132                         seq_printf(seq, "bond %s has no active aggregator\n",
 133                                    bond->dev->name);
 134                 } else {
 135                         seq_printf(seq, "Active Aggregator Info:\n");
 136
 137                         seq_printf(seq, "\tAggregator ID: %d\n",
 138                                    ad_info.aggregator_id);
 139                         seq_printf(seq, "\tNumber of ports: %d\n",
 140                                    ad_info.ports);
 141                         seq_printf(seq, "\tActor Key: %d\n",
 142                                    ad_info.actor_key);
 143                         seq_printf(seq, "\tPartner Key: %d\n",
 144                                    ad_info.partner_key);
 145                         seq_printf(seq, "\tPartner Mac Address: %pM\n",
 146                                    ad_info.partner_system);
 147                 }
 148         }
 149 }
 150
 151 static void bond_info_show_slave(struct seq_file *seq,
 152                                  const struct slave *slave)
 153 {
 154         struct bonding *bond = seq->private;
 155
 156         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 157         seq_printf(seq, "MII Status: %s\n",
 158                    (slave->link == BOND_LINK_UP) ?  "up" : "down");
 159         seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 160         seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 161         seq_printf(seq, "Link Failure Count: %u\n",
 162                    slave->link_failure_count);
 163
 164         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
 165
 166         if (bond->params.mode == BOND_MODE_8023AD) {
 167                 const struct aggregator *agg
 168                         = SLAVE_AD_INFO(slave).port.aggregator;
 169
 170                 if (agg)
 171                         seq_printf(seq, "Aggregator ID: %d\n",
 172                                    agg->aggregator_identifier);
 173                 else
 174                         seq_puts(seq, "Aggregator ID: N/A\n");
 175         }
 176         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 177 }
 178
 179 static int bond_info_seq_show(struct seq_file *seq, void *v)
 180 {
 181         if (v == SEQ_START_TOKEN) {
 182                 seq_printf(seq, "%s\n", bond_version);
 183                 bond_info_show_master(seq);
 184         } else
 185                 bond_info_show_slave(seq, v);
 186
 187         return 0;
 188 }
 189
 190 static const struct seq_operations bond_info_seq_ops = {
 191         .start = bond_info_seq_start,
 192         .next  = bond_info_seq_next,
 193         .stop  = bond_info_seq_stop,
 194         .show  = bond_info_seq_show,
 195 };
 196
 197 static int bond_info_open(struct inode *inode, struct file *file)
 198 {
 199         struct seq_file *seq;
 200         struct proc_dir_entry *proc;
 201         int res;
 202
 203         res = seq_open(file, &bond_info_seq_ops);
 204         if (!res) {
 205                 /* recover the pointer buried in proc_dir_entry data */
 206                 seq = file->private_data;
 207                 proc = PDE(inode);
 208                 seq->private = proc->data;
 209         }
 210
 211         return res;
 212 }
 213
 214 static const struct file_operations bond_info_fops = {
 215         .owner   = THIS_MODULE,
 216         .open    = bond_info_open,
 217         .read    = seq_read,
 218         .llseek  = seq_lseek,
 219         .release = seq_release,
 220 };
 221
 222 void bond_create_proc_entry(struct bonding *bond)
 223 {
 224         struct net_device *bond_dev = bond->dev;
 225         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 226
 227         if (bn->proc_dir) {
 228                 bond->proc_entry = proc_create_data(bond_dev->name,
 229                                                     S_IRUGO, bn->proc_dir,
 230                                                     &bond_info_fops, bond);
 231                 if (bond->proc_entry == NULL)
 232                         pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
 233                                    DRV_NAME, bond_dev->name);
 234                 else
 235                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 236         }
 237 }
 238
 239 void bond_remove_proc_entry(struct bonding *bond)
 240 {
 241         struct net_device *bond_dev = bond->dev;
 242         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 243
 244         if (bn->proc_dir && bond->proc_entry) {
 245                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 246                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 247                 bond->proc_entry = NULL;
 248         }
 249 }
 250
 251 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 252  * Caller must hold rtnl_lock.
 253  */
 254 void __net_init bond_create_proc_dir(struct bond_net *bn)
 255 {
 256         if (!bn->proc_dir) {
 257                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 258                 if (!bn->proc_dir)
 259                         pr_warning("Warning: cannot create /proc/net/%s\n",
 260                                    DRV_NAME);
 261         }
 262 }
 263
 264 /* Destroy the bonding directory under /proc/net, if empty.
 265  * Caller must hold rtnl_lock.
 266  */
 267 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 268 {
 269         if (bn->proc_dir) {
 270                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 271                 bn->proc_dir = NULL;
 272         }
 273 }