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, "Min links: %d\n", bond->params.min_links);
 129                 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
 130                            ad_select_tbl[bond->params.ad_select].modename);
 131
 132                 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
 133                         seq_printf(seq, "bond %s has no active aggregator\n",
 134                                    bond->dev->name);
 135                 } else {
 136                         seq_printf(seq, "Active Aggregator Info:\n");
 137
 138                         seq_printf(seq, "\tAggregator ID: %d\n",
 139                                    ad_info.aggregator_id);
 140                         seq_printf(seq, "\tNumber of ports: %d\n",
 141                                    ad_info.ports);
 142                         seq_printf(seq, "\tActor Key: %d\n",
 143                                    ad_info.actor_key);
 144                         seq_printf(seq, "\tPartner Key: %d\n",
 145                                    ad_info.partner_key);
 146                         seq_printf(seq, "\tPartner Mac Address: %pM\n",
 147                                    ad_info.partner_system);
 148                 }
 149         }
 150 }
 151
 152 static void bond_info_show_slave(struct seq_file *seq,
 153                                  const struct slave *slave)
 154 {
 155         struct bonding *bond = seq->private;
 156
 157         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 158         seq_printf(seq, "MII Status: %s\n",
 159                    (slave->link == BOND_LINK_UP) ?  "up" : "down");
 160         seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 161         seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 162         seq_printf(seq, "Link Failure Count: %u\n",
 163                    slave->link_failure_count);
 164
 165         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
 166
 167         if (bond->params.mode == BOND_MODE_8023AD) {
 168                 const struct aggregator *agg
 169                         = SLAVE_AD_INFO(slave).port.aggregator;
 170
 171                 if (agg)
 172                         seq_printf(seq, "Aggregator ID: %d\n",
 173                                    agg->aggregator_identifier);
 174                 else
 175                         seq_puts(seq, "Aggregator ID: N/A\n");
 176         }
 177         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 178 }
 179
 180 static int bond_info_seq_show(struct seq_file *seq, void *v)
 181 {
 182         if (v == SEQ_START_TOKEN) {
 183                 seq_printf(seq, "%s\n", bond_version);
 184                 bond_info_show_master(seq);
 185         } else
 186                 bond_info_show_slave(seq, v);
 187
 188         return 0;
 189 }
 190
 191 static const struct seq_operations bond_info_seq_ops = {
 192         .start = bond_info_seq_start,
 193         .next  = bond_info_seq_next,
 194         .stop  = bond_info_seq_stop,
 195         .show  = bond_info_seq_show,
 196 };
 197
 198 static int bond_info_open(struct inode *inode, struct file *file)
 199 {
 200         struct seq_file *seq;
 201         struct proc_dir_entry *proc;
 202         int res;
 203
 204         res = seq_open(file, &bond_info_seq_ops);
 205         if (!res) {
 206                 /* recover the pointer buried in proc_dir_entry data */
 207                 seq = file->private_data;
 208                 proc = PDE(inode);
 209                 seq->private = proc->data;
 210         }
 211
 212         return res;
 213 }
 214
 215 static const struct file_operations bond_info_fops = {
 216         .owner   = THIS_MODULE,
 217         .open    = bond_info_open,
 218         .read    = seq_read,
 219         .llseek  = seq_lseek,
 220         .release = seq_release,
 221 };
 222
 223 void bond_create_proc_entry(struct bonding *bond)
 224 {
 225         struct net_device *bond_dev = bond->dev;
 226         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 227
 228         if (bn->proc_dir) {
 229                 bond->proc_entry = proc_create_data(bond_dev->name,
 230                                                     S_IRUGO, bn->proc_dir,
 231                                                     &bond_info_fops, bond);
 232                 if (bond->proc_entry == NULL)
 233                         pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
 234                                    DRV_NAME, bond_dev->name);
 235                 else
 236                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 237         }
 238 }
 239
 240 void bond_remove_proc_entry(struct bonding *bond)
 241 {
 242         struct net_device *bond_dev = bond->dev;
 243         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 244
 245         if (bn->proc_dir && bond->proc_entry) {
 246                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 247                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 248                 bond->proc_entry = NULL;
 249         }
 250 }
 251
 252 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 253  * Caller must hold rtnl_lock.
 254  */
 255 void __net_init bond_create_proc_dir(struct bond_net *bn)
 256 {
 257         if (!bn->proc_dir) {
 258                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 259                 if (!bn->proc_dir)
 260                         pr_warning("Warning: cannot create /proc/net/%s\n",
 261                                    DRV_NAME);
 262         }
 263 }
 264
 265 /* Destroy the bonding directory under /proc/net, if empty.
 266  * Caller must hold rtnl_lock.
 267  */
 268 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 269 {
 270         if (bn->proc_dir) {
 271                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 272                 bn->proc_dir = NULL;
 273         }
 274 }