net/core/net-procfs.c

   1 #include <linux/netdevice.h>
   2 #include <linux/proc_fs.h>
   3 #include <linux/seq_file.h>
   4 #include <net/wext.h>
   5
   6 #define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
   7
   8 #define get_bucket(x) ((x) >> BUCKET_SPACE)
   9 #define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1))
  10 #define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o))
  11
  12 extern struct list_head ptype_all __read_mostly;
  13 extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
  14
  15 static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos)
  16 {
  17         struct net *net = seq_file_net(seq);
  18         struct net_device *dev;
  19         struct hlist_node *p;
  20         struct hlist_head *h;
  21         unsigned int count = 0, offset = get_offset(*pos);
  22
  23         h = &net->dev_name_head[get_bucket(*pos)];
  24         hlist_for_each_entry_rcu(dev, p, h, name_hlist) {
  25                 if (++count == offset)
  26                         return dev;
  27         }
  28
  29         return NULL;
  30 }
  31
  32 static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos)
  33 {
  34         struct net_device *dev;
  35         unsigned int bucket;
  36
  37         do {
  38                 dev = dev_from_same_bucket(seq, pos);
  39                 if (dev)
  40                         return dev;
  41
  42                 bucket = get_bucket(*pos) + 1;
  43                 *pos = set_bucket_offset(bucket, 1);
  44         } while (bucket < NETDEV_HASHENTRIES);
  45
  46         return NULL;
  47 }
  48
  49 /*
  50  *      This is invoked by the /proc filesystem handler to display a device
  51  *      in detail.
  52  */
  53 static void *dev_seq_start(struct seq_file *seq, loff_t *pos)
  54         __acquires(RCU)
  55 {
  56         rcu_read_lock();
  57         if (!*pos)
  58                 return SEQ_START_TOKEN;
  59
  60         if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
  61                 return NULL;
  62
  63         return dev_from_bucket(seq, pos);
  64 }
  65
  66 static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  67 {
  68         ++*pos;
  69         return dev_from_bucket(seq, pos);
  70 }
  71
  72 static void dev_seq_stop(struct seq_file *seq, void *v)
  73         __releases(RCU)
  74 {
  75         rcu_read_unlock();
  76 }
  77
  78 static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
  79 {
  80         struct rtnl_link_stats64 temp;
  81         const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
  82
  83         seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu "
  84                    "%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n",
  85                    dev->name, stats->rx_bytes, stats->rx_packets,
  86                    stats->rx_errors,
  87                    stats->rx_dropped + stats->rx_missed_errors,
  88                    stats->rx_fifo_errors,
  89                    stats->rx_length_errors + stats->rx_over_errors +
  90                     stats->rx_crc_errors + stats->rx_frame_errors,
  91                    stats->rx_compressed, stats->multicast,
  92                    stats->tx_bytes, stats->tx_packets,
  93                    stats->tx_errors, stats->tx_dropped,
  94                    stats->tx_fifo_errors, stats->collisions,
  95                    stats->tx_carrier_errors +
  96                     stats->tx_aborted_errors +
  97                     stats->tx_window_errors +
  98                     stats->tx_heartbeat_errors,
  99                    stats->tx_compressed);
 100 }
 101
 102 /*
 103  *      Called from the PROCfs module. This now uses the new arbitrary sized
 104  *      /proc/net interface to create /proc/net/dev
 105  */
 106 static int dev_seq_show(struct seq_file *seq, void *v)
 107 {
 108         if (v == SEQ_START_TOKEN)
 109                 seq_puts(seq, "Inter-|   Receive                            "
 110                               "                    |  Transmit\n"
 111                               " face |bytes    packets errs drop fifo frame "
 112                               "compressed multicast|bytes    packets errs "
 113                               "drop fifo colls carrier compressed\n");
 114         else
 115                 dev_seq_printf_stats(seq, v);
 116         return 0;
 117 }
 118
 119 static struct softnet_data *softnet_get_online(loff_t *pos)
 120 {
 121         struct softnet_data *sd = NULL;
 122
 123         while (*pos < nr_cpu_ids)
 124                 if (cpu_online(*pos)) {
 125                         sd = &per_cpu(softnet_data, *pos);
 126                         break;
 127                 } else
 128                         ++*pos;
 129         return sd;
 130 }
 131
 132 static void *softnet_seq_start(struct seq_file *seq, loff_t *pos)
 133 {
 134         return softnet_get_online(pos);
 135 }
 136
 137 static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 138 {
 139         ++*pos;
 140         return softnet_get_online(pos);
 141 }
 142
 143 static void softnet_seq_stop(struct seq_file *seq, void *v)
 144 {
 145 }
 146
 147 static int softnet_seq_show(struct seq_file *seq, void *v)
 148 {
 149         struct softnet_data *sd = v;
 150
 151         seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
 152                    sd->processed, sd->dropped, sd->time_squeeze, 0,
 153                    0, 0, 0, 0, /* was fastroute */
 154                    sd->cpu_collision, sd->received_rps);
 155         return 0;
 156 }
 157
 158 static const struct seq_operations dev_seq_ops = {
 159         .start = dev_seq_start,
 160         .next  = dev_seq_next,
 161         .stop  = dev_seq_stop,
 162         .show  = dev_seq_show,
 163 };
 164
 165 static int dev_seq_open(struct inode *inode, struct file *file)
 166 {
 167         return seq_open_net(inode, file, &dev_seq_ops,
 168                             sizeof(struct seq_net_private));
 169 }
 170
 171 static const struct file_operations dev_seq_fops = {
 172         .owner   = THIS_MODULE,
 173         .open    = dev_seq_open,
 174         .read    = seq_read,
 175         .llseek  = seq_lseek,
 176         .release = seq_release_net,
 177 };
 178
 179 static const struct seq_operations softnet_seq_ops = {
 180         .start = softnet_seq_start,
 181         .next  = softnet_seq_next,
 182         .stop  = softnet_seq_stop,
 183         .show  = softnet_seq_show,
 184 };
 185
 186 static int softnet_seq_open(struct inode *inode, struct file *file)
 187 {
 188         return seq_open(file, &softnet_seq_ops);
 189 }
 190
 191 static const struct file_operations softnet_seq_fops = {
 192         .owner   = THIS_MODULE,
 193         .open    = softnet_seq_open,
 194         .read    = seq_read,
 195         .llseek  = seq_lseek,
 196         .release = seq_release,
 197 };
 198
 199 static void *ptype_get_idx(loff_t pos)
 200 {
 201         struct packet_type *pt = NULL;
 202         loff_t i = 0;
 203         int t;
 204
 205         list_for_each_entry_rcu(pt, &ptype_all, list) {
 206                 if (i == pos)
 207                         return pt;
 208                 ++i;
 209         }
 210
 211         for (t = 0; t < PTYPE_HASH_SIZE; t++) {
 212                 list_for_each_entry_rcu(pt, &ptype_base[t], list) {
 213                         if (i == pos)
 214                                 return pt;
 215                         ++i;
 216                 }
 217         }
 218         return NULL;
 219 }
 220
 221 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
 222         __acquires(RCU)
 223 {
 224         rcu_read_lock();
 225         return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN;
 226 }
 227
 228 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 229 {
 230         struct packet_type *pt;
 231         struct list_head *nxt;
 232         int hash;
 233
 234         ++*pos;
 235         if (v == SEQ_START_TOKEN)
 236                 return ptype_get_idx(0);
 237
 238         pt = v;
 239         nxt = pt->list.next;
 240         if (pt->type == htons(ETH_P_ALL)) {
 241                 if (nxt != &ptype_all)
 242                         goto found;
 243                 hash = 0;
 244                 nxt = ptype_base[0].next;
 245         } else
 246                 hash = ntohs(pt->type) & PTYPE_HASH_MASK;
 247
 248         while (nxt == &ptype_base[hash]) {
 249                 if (++hash >= PTYPE_HASH_SIZE)
 250                         return NULL;
 251                 nxt = ptype_base[hash].next;
 252         }
 253 found:
 254         return list_entry(nxt, struct packet_type, list);
 255 }
 256
 257 static void ptype_seq_stop(struct seq_file *seq, void *v)
 258         __releases(RCU)
 259 {
 260         rcu_read_unlock();
 261 }
 262
 263 static int ptype_seq_show(struct seq_file *seq, void *v)
 264 {
 265         struct packet_type *pt = v;
 266
 267         if (v == SEQ_START_TOKEN)
 268                 seq_puts(seq, "Type Device      Function\n");
 269         else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) {
 270                 if (pt->type == htons(ETH_P_ALL))
 271                         seq_puts(seq, "ALL ");
 272                 else
 273                         seq_printf(seq, "%04x", ntohs(pt->type));
 274
 275                 seq_printf(seq, " %-8s %pF\n",
 276                            pt->dev ? pt->dev->name : "", pt->func);
 277         }
 278
 279         return 0;
 280 }
 281
 282 static const struct seq_operations ptype_seq_ops = {
 283         .start = ptype_seq_start,
 284         .next  = ptype_seq_next,
 285         .stop  = ptype_seq_stop,
 286         .show  = ptype_seq_show,
 287 };
 288
 289 static int ptype_seq_open(struct inode *inode, struct file *file)
 290 {
 291         return seq_open_net(inode, file, &ptype_seq_ops,
 292                         sizeof(struct seq_net_private));
 293 }
 294
 295 static const struct file_operations ptype_seq_fops = {
 296         .owner   = THIS_MODULE,
 297         .open    = ptype_seq_open,
 298         .read    = seq_read,
 299         .llseek  = seq_lseek,
 300         .release = seq_release_net,
 301 };
 302
 303
 304 static int __net_init dev_proc_net_init(struct net *net)
 305 {
 306         int rc = -ENOMEM;
 307
 308         if (!proc_create("dev", S_IRUGO, net->proc_net, &dev_seq_fops))
 309                 goto out;
 310         if (!proc_create("softnet_stat", S_IRUGO, net->proc_net,
 311                          &softnet_seq_fops))
 312                 goto out_dev;
 313         if (!proc_create("ptype", S_IRUGO, net->proc_net, &ptype_seq_fops))
 314                 goto out_softnet;
 315
 316         if (wext_proc_init(net))
 317                 goto out_ptype;
 318         rc = 0;
 319 out:
 320         return rc;
 321 out_ptype:
 322         remove_proc_entry("ptype", net->proc_net);
 323 out_softnet:
 324         remove_proc_entry("softnet_stat", net->proc_net);
 325 out_dev:
 326         remove_proc_entry("dev", net->proc_net);
 327         goto out;
 328 }
 329
 330 static void __net_exit dev_proc_net_exit(struct net *net)
 331 {
 332         wext_proc_exit(net);
 333
 334         remove_proc_entry("ptype", net->proc_net);
 335         remove_proc_entry("softnet_stat", net->proc_net);
 336         remove_proc_entry("dev", net->proc_net);
 337 }
 338
 339 static struct pernet_operations __net_initdata dev_proc_ops = {
 340         .init = dev_proc_net_init,
 341         .exit = dev_proc_net_exit,
 342 };
 343
 344 int __init dev_proc_init(void)
 345 {
 346         return register_pernet_subsys(&dev_proc_ops);
 347 }
 348
 349 static int dev_mc_seq_show(struct seq_file *seq, void *v)
 350 {
 351         struct netdev_hw_addr *ha;
 352         struct net_device *dev = v;
 353
 354         if (v == SEQ_START_TOKEN)
 355                 return 0;
 356
 357         netif_addr_lock_bh(dev);
 358         netdev_for_each_mc_addr(ha, dev) {
 359                 int i;
 360
 361                 seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
 362                            dev->name, ha->refcount, ha->global_use);
 363
 364                 for (i = 0; i < dev->addr_len; i++)
 365                         seq_printf(seq, "%02x", ha->addr[i]);
 366
 367                 seq_putc(seq, '\n');
 368         }
 369         netif_addr_unlock_bh(dev);
 370         return 0;
 371 }
 372
 373 static const struct seq_operations dev_mc_seq_ops = {
 374         .start = dev_seq_start,
 375         .next  = dev_seq_next,
 376         .stop  = dev_seq_stop,
 377         .show  = dev_mc_seq_show,
 378 };
 379
 380 static int dev_mc_seq_open(struct inode *inode, struct file *file)
 381 {
 382         return seq_open_net(inode, file, &dev_mc_seq_ops,
 383                             sizeof(struct seq_net_private));
 384 }
 385
 386 static const struct file_operations dev_mc_seq_fops = {
 387         .owner   = THIS_MODULE,
 388         .open    = dev_mc_seq_open,
 389         .read    = seq_read,
 390         .llseek  = seq_lseek,
 391         .release = seq_release_net,
 392 };
 393
 394 static int __net_init dev_mc_net_init(struct net *net)
 395 {
 396         if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops))
 397                 return -ENOMEM;
 398         return 0;
 399 }
 400
 401 static void __net_exit dev_mc_net_exit(struct net *net)
 402 {
 403         remove_proc_entry("dev_mcast", net->proc_net);
 404 }
 405
 406 static struct pernet_operations __net_initdata dev_mc_net_ops = {
 407         .init = dev_mc_net_init,
 408         .exit = dev_mc_net_exit,
 409 };
 410
 411 void __init dev_mcast_init(void)
 412 {
 413         register_pernet_subsys(&dev_mc_net_ops);
 414 }