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         loff_t off = 0;
  14         struct slave *slave;
  15         int i;
  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, i) {
  25                 if (++off == *pos)
  26                         return slave;
  27         }
  28
  29         return NULL;
  30 }
  31
  32 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  33 {
  34         struct bonding *bond = seq->private;
  35         struct slave *slave = v;
  36
  37         ++*pos;
  38         if (v == SEQ_START_TOKEN)
  39                 return bond->first_slave;
  40
  41         slave = slave->next;
  42
  43         return (slave == bond->first_slave) ? NULL : slave;
  44 }
  45
  46 static void bond_info_seq_stop(struct seq_file *seq, void *v)
  47         __releases(&bond->lock)
  48         __releases(RCU)
  49 {
  50         struct bonding *bond = seq->private;
  51
  52         read_unlock(&bond->lock);
  53         rcu_read_unlock();
  54 }
  55
  56 static void bond_info_show_master(struct seq_file *seq)
  57 {
  58         struct bonding *bond = seq->private;
  59         struct slave *curr;
  60         int i;
  61
  62         read_lock(&bond->curr_slave_lock);
  63         curr = bond->curr_active_slave;
  64         read_unlock(&bond->curr_slave_lock);
  65
  66         seq_printf(seq, "Bonding Mode: %s",
  67                    bond_mode_name(bond->params.mode));
  68
  69         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
  70             bond->params.fail_over_mac)
  71                 seq_printf(seq, " (fail_over_mac %s)",
  72                    fail_over_mac_tbl[bond->params.fail_over_mac].modename);
  73
  74         seq_printf(seq, "\n");
  75
  76         if (bond->params.mode == BOND_MODE_XOR ||
  77                 bond->params.mode == BOND_MODE_8023AD) {
  78                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  79                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
  80                         bond->params.xmit_policy);
  81         }
  82
  83         if (USES_PRIMARY(bond->params.mode)) {
  84                 seq_printf(seq, "Primary Slave: %s",
  85                            (bond->primary_slave) ?
  86                            bond->primary_slave->dev->name : "None");
  87                 if (bond->primary_slave)
  88                         seq_printf(seq, " (primary_reselect %s)",
  89                    pri_reselect_tbl[bond->params.primary_reselect].modename);
  90
  91                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
  92                            (curr) ? curr->dev->name : "None");
  93         }
  94
  95         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
  96                    "up" : "down");
  97         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
  98         seq_printf(seq, "Up Delay (ms): %d\n",
  99                    bond->params.updelay * bond->params.miimon);
 100         seq_printf(seq, "Down Delay (ms): %d\n",
 101                    bond->params.downdelay * bond->params.miimon);
 102
 103
 104         /* ARP information */
 105         if (bond->params.arp_interval > 0) {
 106                 int printed = 0;
 107                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 108                                 bond->params.arp_interval);
 109
 110                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 111
 112                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 113                         if (!bond->params.arp_targets[i])
 114                                 break;
 115                         if (printed)
 116                                 seq_printf(seq, ",");
 117                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 118                         printed = 1;
 119                 }
 120                 seq_printf(seq, "\n");
 121         }
 122
 123         if (bond->params.mode == BOND_MODE_8023AD) {
 124                 struct ad_info ad_info;
 125
 126                 seq_puts(seq, "\n802.3ad info\n");
 127                 seq_printf(seq, "LACP rate: %s\n",
 128                            (bond->params.lacp_fast) ? "fast" : "slow");
 129                 seq_printf(seq, "Min links: %d\n", bond->params.min_links);
 130                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 131                            ad_select_tbl[bond->params.ad_select].modename);
 132
 133                 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
 134                         seq_printf(seq, "bond %s has no active aggregator\n",
 135                                    bond->dev->name);
 136                 } else {
 137                         seq_printf(seq, "Active Aggregator Info:\n");
 138
 139                         seq_printf(seq, "\tAggregator ID: %d\n",
 140                                    ad_info.aggregator_id);
 141                         seq_printf(seq, "\tNumber of ports: %d\n",
 142                                    ad_info.ports);
 143                         seq_printf(seq, "\tActor Key: %d\n",
 144                                    ad_info.actor_key);
 145                         seq_printf(seq, "\tPartner Key: %d\n",
 146                                    ad_info.partner_key);
 147                         seq_printf(seq, "\tPartner Mac Address: %pM\n",
 148                                    ad_info.partner_system);
 149                 }
 150         }
 151 }
 152
 153 static const char *bond_slave_link_status(s8 link)
 154 {
 155         static const char * const status[] = {
 156                 [BOND_LINK_UP] = "up",
 157                 [BOND_LINK_FAIL] = "going down",
 158                 [BOND_LINK_DOWN] = "down",
 159                 [BOND_LINK_BACK] = "going back",
 160         };
 161
 162         return status[link];
 163 }
 164
 165 static void bond_info_show_slave(struct seq_file *seq,
 166                                  const struct slave *slave)
 167 {
 168         struct bonding *bond = seq->private;
 169
 170         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 171         seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
 172         if (slave->speed == SPEED_UNKNOWN)
 173                 seq_printf(seq, "Speed: %s\n", "Unknown");
 174         else
 175                 seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 176
 177         if (slave->duplex == DUPLEX_UNKNOWN)
 178                 seq_printf(seq, "Duplex: %s\n", "Unknown");
 179         else
 180                 seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 181
 182         seq_printf(seq, "Link Failure Count: %u\n",
 183                    slave->link_failure_count);
 184
 185         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
 186
 187         if (bond->params.mode == BOND_MODE_8023AD) {
 188                 const struct aggregator *agg
 189                         = SLAVE_AD_INFO(slave).port.aggregator;
 190
 191                 if (agg)
 192                         seq_printf(seq, "Aggregator ID: %d\n",
 193                                    agg->aggregator_identifier);
 194                 else
 195                         seq_puts(seq, "Aggregator ID: N/A\n");
 196         }
 197         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 198 }
 199
 200 static int bond_info_seq_show(struct seq_file *seq, void *v)
 201 {
 202         if (v == SEQ_START_TOKEN) {
 203                 seq_printf(seq, "%s\n", bond_version);
 204                 bond_info_show_master(seq);
 205         } else
 206                 bond_info_show_slave(seq, v);
 207
 208         return 0;
 209 }
 210
 211 static const struct seq_operations bond_info_seq_ops = {
 212         .start = bond_info_seq_start,
 213         .next  = bond_info_seq_next,
 214         .stop  = bond_info_seq_stop,
 215         .show  = bond_info_seq_show,
 216 };
 217
 218 static int bond_info_open(struct inode *inode, struct file *file)
 219 {
 220         struct seq_file *seq;
 221         struct proc_dir_entry *proc;
 222         int res;
 223
 224         res = seq_open(file, &bond_info_seq_ops);
 225         if (!res) {
 226                 /* recover the pointer buried in proc_dir_entry data */
 227                 seq = file->private_data;
 228                 proc = PDE(inode);
 229                 seq->private = proc->data;
 230         }
 231
 232         return res;
 233 }
 234
 235 static const struct file_operations bond_info_fops = {
 236         .owner   = THIS_MODULE,
 237         .open    = bond_info_open,
 238         .read    = seq_read,
 239         .llseek  = seq_lseek,
 240         .release = seq_release,
 241 };
 242
 243 void bond_create_proc_entry(struct bonding *bond)
 244 {
 245         struct net_device *bond_dev = bond->dev;
 246         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 247
 248         if (bn->proc_dir) {
 249                 bond->proc_entry = proc_create_data(bond_dev->name,
 250                                                     S_IRUGO, bn->proc_dir,
 251                                                     &bond_info_fops, bond);
 252                 if (bond->proc_entry == NULL)
 253                         pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
 254                                    DRV_NAME, bond_dev->name);
 255                 else
 256                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 257         }
 258 }
 259
 260 void bond_remove_proc_entry(struct bonding *bond)
 261 {
 262         struct net_device *bond_dev = bond->dev;
 263         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 264
 265         if (bn->proc_dir && bond->proc_entry) {
 266                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 267                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 268                 bond->proc_entry = NULL;
 269         }
 270 }
 271
 272 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 273  * Caller must hold rtnl_lock.
 274  */
 275 void __net_init bond_create_proc_dir(struct bond_net *bn)
 276 {
 277         if (!bn->proc_dir) {
 278                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 279                 if (!bn->proc_dir)
 280                         pr_warning("Warning: cannot create /proc/net/%s\n",
 281                                    DRV_NAME);
 282         }
 283 }
 284
 285 /* Destroy the bonding directory under /proc/net, if empty.
 286  * Caller must hold rtnl_lock.
 287  */
 288 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 289 {
 290         if (bn->proc_dir) {
 291                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 292                 bn->proc_dir = NULL;
 293         }
 294 }