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 extern const char *bond_mode_name(int mode);
   8
   9 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
  10         __acquires(RCU)
  11         __acquires(&bond->lock)
  12 {
  13         struct bonding *bond = seq->private;
  14         loff_t off = 0;
  15         struct slave *slave;
  16         int i;
  17
  18         /* make sure the bond won't be taken away */
  19         rcu_read_lock();
  20         read_lock(&bond->lock);
  21
  22         if (*pos == 0)
  23                 return SEQ_START_TOKEN;
  24
  25         bond_for_each_slave(bond, slave, i) {
  26                 if (++off == *pos)
  27                         return slave;
  28         }
  29
  30         return NULL;
  31 }
  32
  33 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  34 {
  35         struct bonding *bond = seq->private;
  36         struct slave *slave = v;
  37
  38         ++*pos;
  39         if (v == SEQ_START_TOKEN)
  40                 return bond->first_slave;
  41
  42         slave = slave->next;
  43
  44         return (slave == bond->first_slave) ? NULL : slave;
  45 }
  46
  47 static void bond_info_seq_stop(struct seq_file *seq, void *v)
  48         __releases(&bond->lock)
  49         __releases(RCU)
  50 {
  51         struct bonding *bond = seq->private;
  52
  53         read_unlock(&bond->lock);
  54         rcu_read_unlock();
  55 }
  56
  57 static void bond_info_show_master(struct seq_file *seq)
  58 {
  59         struct bonding *bond = seq->private;
  60         struct slave *curr;
  61         int i;
  62
  63         read_lock(&bond->curr_slave_lock);
  64         curr = bond->curr_active_slave;
  65         read_unlock(&bond->curr_slave_lock);
  66
  67         seq_printf(seq, "Bonding Mode: %s",
  68                    bond_mode_name(bond->params.mode));
  69
  70         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
  71             bond->params.fail_over_mac)
  72                 seq_printf(seq, " (fail_over_mac %s)",
  73                    fail_over_mac_tbl[bond->params.fail_over_mac].modename);
  74
  75         seq_printf(seq, "\n");
  76
  77         if (bond->params.mode == BOND_MODE_XOR ||
  78                 bond->params.mode == BOND_MODE_8023AD) {
  79                 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
  80                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
  81                         bond->params.xmit_policy);
  82         }
  83
  84         if (USES_PRIMARY(bond->params.mode)) {
  85                 seq_printf(seq, "Primary Slave: %s",
  86                            (bond->primary_slave) ?
  87                            bond->primary_slave->dev->name : "None");
  88                 if (bond->primary_slave)
  89                         seq_printf(seq, " (primary_reselect %s)",
  90                    pri_reselect_tbl[bond->params.primary_reselect].modename);
  91
  92                 seq_printf(seq, "\nCurrently Active Slave: %s\n",
  93                            (curr) ? curr->dev->name : "None");
  94         }
  95
  96         seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
  97                    "up" : "down");
  98         seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
  99         seq_printf(seq, "Up Delay (ms): %d\n",
 100                    bond->params.updelay * bond->params.miimon);
 101         seq_printf(seq, "Down Delay (ms): %d\n",
 102                    bond->params.downdelay * bond->params.miimon);
 103
 104
 105         /* ARP information */
 106         if (bond->params.arp_interval > 0) {
 107                 int printed = 0;
 108                 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
 109                                 bond->params.arp_interval);
 110
 111                 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
 112
 113                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 114                         if (!bond->params.arp_targets[i])
 115                                 break;
 116                         if (printed)
 117                                 seq_printf(seq, ",");
 118                         seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
 119                         printed = 1;
 120                 }
 121                 seq_printf(seq, "\n");
 122         }
 123
 124         if (bond->params.mode == BOND_MODE_8023AD) {
 125                 struct ad_info ad_info;
 126
 127                 seq_puts(seq, "\n802.3ad info\n");
 128                 seq_printf(seq, "LACP rate: %s\n",
 129                            (bond->params.lacp_fast) ? "fast" : "slow");
 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 void bond_info_show_slave(struct seq_file *seq,
 154                                  const struct slave *slave)
 155 {
 156         struct bonding *bond = seq->private;
 157
 158         seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
 159         seq_printf(seq, "MII Status: %s\n",
 160                    (slave->link == BOND_LINK_UP) ?  "up" : "down");
 161         seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
 162         seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
 163         seq_printf(seq, "Link Failure Count: %u\n",
 164                    slave->link_failure_count);
 165
 166         seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
 167
 168         if (bond->params.mode == BOND_MODE_8023AD) {
 169                 const struct aggregator *agg
 170                         = SLAVE_AD_INFO(slave).port.aggregator;
 171
 172                 if (agg)
 173                         seq_printf(seq, "Aggregator ID: %d\n",
 174                                    agg->aggregator_identifier);
 175                 else
 176                         seq_puts(seq, "Aggregator ID: N/A\n");
 177         }
 178         seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
 179 }
 180
 181 static int bond_info_seq_show(struct seq_file *seq, void *v)
 182 {
 183         if (v == SEQ_START_TOKEN) {
 184                 seq_printf(seq, "%s\n", bond_version);
 185                 bond_info_show_master(seq);
 186         } else
 187                 bond_info_show_slave(seq, v);
 188
 189         return 0;
 190 }
 191
 192 static const struct seq_operations bond_info_seq_ops = {
 193         .start = bond_info_seq_start,
 194         .next  = bond_info_seq_next,
 195         .stop  = bond_info_seq_stop,
 196         .show  = bond_info_seq_show,
 197 };
 198
 199 static int bond_info_open(struct inode *inode, struct file *file)
 200 {
 201         struct seq_file *seq;
 202         struct proc_dir_entry *proc;
 203         int res;
 204
 205         res = seq_open(file, &bond_info_seq_ops);
 206         if (!res) {
 207                 /* recover the pointer buried in proc_dir_entry data */
 208                 seq = file->private_data;
 209                 proc = PDE(inode);
 210                 seq->private = proc->data;
 211         }
 212
 213         return res;
 214 }
 215
 216 static const struct file_operations bond_info_fops = {
 217         .owner   = THIS_MODULE,
 218         .open    = bond_info_open,
 219         .read    = seq_read,
 220         .llseek  = seq_lseek,
 221         .release = seq_release,
 222 };
 223
 224 void bond_create_proc_entry(struct bonding *bond)
 225 {
 226         struct net_device *bond_dev = bond->dev;
 227         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 228
 229         if (bn->proc_dir) {
 230                 bond->proc_entry = proc_create_data(bond_dev->name,
 231                                                     S_IRUGO, bn->proc_dir,
 232                                                     &bond_info_fops, bond);
 233                 if (bond->proc_entry == NULL)
 234                         pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
 235                                    DRV_NAME, bond_dev->name);
 236                 else
 237                         memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
 238         }
 239 }
 240
 241 void bond_remove_proc_entry(struct bonding *bond)
 242 {
 243         struct net_device *bond_dev = bond->dev;
 244         struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
 245
 246         if (bn->proc_dir && bond->proc_entry) {
 247                 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
 248                 memset(bond->proc_file_name, 0, IFNAMSIZ);
 249                 bond->proc_entry = NULL;
 250         }
 251 }
 252
 253 /* Create the bonding directory under /proc/net, if doesn't exist yet.
 254  * Caller must hold rtnl_lock.
 255  */
 256 void __net_init bond_create_proc_dir(struct bond_net *bn)
 257 {
 258         if (!bn->proc_dir) {
 259                 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
 260                 if (!bn->proc_dir)
 261                         pr_warning("Warning: cannot create /proc/net/%s\n",
 262                                    DRV_NAME);
 263         }
 264 }
 265
 266 /* Destroy the bonding directory under /proc/net, if empty.
 267  * Caller must hold rtnl_lock.
 268  */
 269 void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
 270 {
 271         if (bn->proc_dir) {
 272                 remove_proc_entry(DRV_NAME, bn->net->proc_net);
 273                 bn->proc_dir = NULL;
 274         }
 275 }