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_head *h; 20 unsigned int count = 0, offset = get_offset(*pos); 21 22 h = &net->dev_name_head[get_bucket(*pos)]; 23 hlist_for_each_entry_rcu(dev, h, name_hlist) { 24 if (++count == offset) 25 return dev; 26 } 27 28 return NULL; 29 } 30 31 static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos) 32 { 33 struct net_device *dev; 34 unsigned int bucket; 35 36 do { 37 dev = dev_from_same_bucket(seq, pos); 38 if (dev) 39 return dev; 40 41 bucket = get_bucket(*pos) + 1; 42 *pos = set_bucket_offset(bucket, 1); 43 } while (bucket < NETDEV_HASHENTRIES); 44 45 return NULL; 46 } 47 48 /* 49 * This is invoked by the /proc filesystem handler to display a device 50 * in detail. 51 */ 52 static void *dev_seq_start(struct seq_file *seq, loff_t *pos) 53 __acquires(RCU) 54 { 55 rcu_read_lock(); 56 if (!*pos) 57 return SEQ_START_TOKEN; 58 59 if (get_bucket(*pos) >= NETDEV_HASHENTRIES) 60 return NULL; 61 62 return dev_from_bucket(seq, pos); 63 } 64 65 static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) 66 { 67 ++*pos; 68 return dev_from_bucket(seq, pos); 69 } 70 71 static void dev_seq_stop(struct seq_file *seq, void *v) 72 __releases(RCU) 73 { 74 rcu_read_unlock(); 75 } 76 77 static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev) 78 { 79 struct rtnl_link_stats64 temp; 80 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); 81 82 seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu " 83 "%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n", 84 dev->name, stats->rx_bytes, stats->rx_packets, 85 stats->rx_errors, 86 stats->rx_dropped + stats->rx_missed_errors, 87 stats->rx_fifo_errors, 88 stats->rx_length_errors + stats->rx_over_errors + 89 stats->rx_crc_errors + stats->rx_frame_errors, 90 stats->rx_compressed, stats->multicast, 91 stats->tx_bytes, stats->tx_packets, 92 stats->tx_errors, stats->tx_dropped, 93 stats->tx_fifo_errors, stats->collisions, 94 stats->tx_carrier_errors + 95 stats->tx_aborted_errors + 96 stats->tx_window_errors + 97 stats->tx_heartbeat_errors, 98 stats->tx_compressed); 99 } 100 101 /* 102 * Called from the PROCfs module. This now uses the new arbitrary sized 103 * /proc/net interface to create /proc/net/dev 104 */ 105 static int dev_seq_show(struct seq_file *seq, void *v) 106 { 107 if (v == SEQ_START_TOKEN) 108 seq_puts(seq, "Inter-| Receive " 109 " | Transmit\n" 110 " face |bytes packets errs drop fifo frame " 111 "compressed multicast|bytes packets errs " 112 "drop fifo colls carrier compressed\n"); 113 else 114 dev_seq_printf_stats(seq, v); 115 return 0; 116 } 117 118 static struct softnet_data *softnet_get_online(loff_t *pos) 119 { 120 struct softnet_data *sd = NULL; 121 122 while (*pos < nr_cpu_ids) 123 if (cpu_online(*pos)) { 124 sd = &per_cpu(softnet_data, *pos); 125 break; 126 } else 127 ++*pos; 128 return sd; 129 } 130 131 static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) 132 { 133 return softnet_get_online(pos); 134 } 135 136 static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) 137 { 138 ++*pos; 139 return softnet_get_online(pos); 140 } 141 142 static void softnet_seq_stop(struct seq_file *seq, void *v) 143 { 144 } 145 146 static int softnet_seq_show(struct seq_file *seq, void *v) 147 { 148 struct softnet_data *sd = v; 149 unsigned int flow_limit_count = 0; 150 151 #ifdef CONFIG_NET_FLOW_LIMIT 152 struct sd_flow_limit *fl; 153 154 rcu_read_lock(); 155 fl = rcu_dereference(sd->flow_limit); 156 if (fl) 157 flow_limit_count = fl->count; 158 rcu_read_unlock(); 159 #endif 160 161 seq_printf(seq, 162 "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n", 163 sd->processed, sd->dropped, sd->time_squeeze, 0, 164 0, 0, 0, 0, /* was fastroute */ 165 sd->cpu_collision, sd->received_rps, flow_limit_count); 166 return 0; 167 } 168 169 static const struct seq_operations dev_seq_ops = { 170 .start = dev_seq_start, 171 .next = dev_seq_next, 172 .stop = dev_seq_stop, 173 .show = dev_seq_show, 174 }; 175 176 static int dev_seq_open(struct inode *inode, struct file *file) 177 { 178 return seq_open_net(inode, file, &dev_seq_ops, 179 sizeof(struct seq_net_private)); 180 } 181 182 static const struct file_operations dev_seq_fops = { 183 .owner = THIS_MODULE, 184 .open = dev_seq_open, 185 .read = seq_read, 186 .llseek = seq_lseek, 187 .release = seq_release_net, 188 }; 189 190 static const struct seq_operations softnet_seq_ops = { 191 .start = softnet_seq_start, 192 .next = softnet_seq_next, 193 .stop = softnet_seq_stop, 194 .show = softnet_seq_show, 195 }; 196 197 static int softnet_seq_open(struct inode *inode, struct file *file) 198 { 199 return seq_open(file, &softnet_seq_ops); 200 } 201 202 static const struct file_operations softnet_seq_fops = { 203 .owner = THIS_MODULE, 204 .open = softnet_seq_open, 205 .read = seq_read, 206 .llseek = seq_lseek, 207 .release = seq_release, 208 }; 209 210 static void *ptype_get_idx(loff_t pos) 211 { 212 struct packet_type *pt = NULL; 213 loff_t i = 0; 214 int t; 215 216 list_for_each_entry_rcu(pt, &ptype_all, list) { 217 if (i == pos) 218 return pt; 219 ++i; 220 } 221 222 for (t = 0; t < PTYPE_HASH_SIZE; t++) { 223 list_for_each_entry_rcu(pt, &ptype_base[t], list) { 224 if (i == pos) 225 return pt; 226 ++i; 227 } 228 } 229 return NULL; 230 } 231 232 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) 233 __acquires(RCU) 234 { 235 rcu_read_lock(); 236 return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN; 237 } 238 239 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) 240 { 241 struct packet_type *pt; 242 struct list_head *nxt; 243 int hash; 244 245 ++*pos; 246 if (v == SEQ_START_TOKEN) 247 return ptype_get_idx(0); 248 249 pt = v; 250 nxt = pt->list.next; 251 if (pt->type == htons(ETH_P_ALL)) { 252 if (nxt != &ptype_all) 253 goto found; 254 hash = 0; 255 nxt = ptype_base[0].next; 256 } else 257 hash = ntohs(pt->type) & PTYPE_HASH_MASK; 258 259 while (nxt == &ptype_base[hash]) { 260 if (++hash >= PTYPE_HASH_SIZE) 261 return NULL; 262 nxt = ptype_base[hash].next; 263 } 264 found: 265 return list_entry(nxt, struct packet_type, list); 266 } 267 268 static void ptype_seq_stop(struct seq_file *seq, void *v) 269 __releases(RCU) 270 { 271 rcu_read_unlock(); 272 } 273 274 static int ptype_seq_show(struct seq_file *seq, void *v) 275 { 276 struct packet_type *pt = v; 277 278 if (v == SEQ_START_TOKEN) 279 seq_puts(seq, "Type Device Function\n"); 280 else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) { 281 if (pt->type == htons(ETH_P_ALL)) 282 seq_puts(seq, "ALL "); 283 else 284 seq_printf(seq, "%04x", ntohs(pt->type)); 285 286 seq_printf(seq, " %-8s %pf\n", 287 pt->dev ? pt->dev->name : "", pt->func); 288 } 289 290 return 0; 291 } 292 293 static const struct seq_operations ptype_seq_ops = { 294 .start = ptype_seq_start, 295 .next = ptype_seq_next, 296 .stop = ptype_seq_stop, 297 .show = ptype_seq_show, 298 }; 299 300 static int ptype_seq_open(struct inode *inode, struct file *file) 301 { 302 return seq_open_net(inode, file, &ptype_seq_ops, 303 sizeof(struct seq_net_private)); 304 } 305 306 static const struct file_operations ptype_seq_fops = { 307 .owner = THIS_MODULE, 308 .open = ptype_seq_open, 309 .read = seq_read, 310 .llseek = seq_lseek, 311 .release = seq_release_net, 312 }; 313 314 315 static int __net_init dev_proc_net_init(struct net *net) 316 { 317 int rc = -ENOMEM; 318 319 if (!proc_create("dev", S_IRUGO, net->proc_net, &dev_seq_fops)) 320 goto out; 321 if (!proc_create("softnet_stat", S_IRUGO, net->proc_net, 322 &softnet_seq_fops)) 323 goto out_dev; 324 if (!proc_create("ptype", S_IRUGO, net->proc_net, &ptype_seq_fops)) 325 goto out_softnet; 326 327 if (wext_proc_init(net)) 328 goto out_ptype; 329 rc = 0; 330 out: 331 return rc; 332 out_ptype: 333 remove_proc_entry("ptype", net->proc_net); 334 out_softnet: 335 remove_proc_entry("softnet_stat", net->proc_net); 336 out_dev: 337 remove_proc_entry("dev", net->proc_net); 338 goto out; 339 } 340 341 static void __net_exit dev_proc_net_exit(struct net *net) 342 { 343 wext_proc_exit(net); 344 345 remove_proc_entry("ptype", net->proc_net); 346 remove_proc_entry("softnet_stat", net->proc_net); 347 remove_proc_entry("dev", net->proc_net); 348 } 349 350 static struct pernet_operations __net_initdata dev_proc_ops = { 351 .init = dev_proc_net_init, 352 .exit = dev_proc_net_exit, 353 }; 354 355 static int dev_mc_seq_show(struct seq_file *seq, void *v) 356 { 357 struct netdev_hw_addr *ha; 358 struct net_device *dev = v; 359 360 if (v == SEQ_START_TOKEN) 361 return 0; 362 363 netif_addr_lock_bh(dev); 364 netdev_for_each_mc_addr(ha, dev) { 365 int i; 366 367 seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex, 368 dev->name, ha->refcount, ha->global_use); 369 370 for (i = 0; i < dev->addr_len; i++) 371 seq_printf(seq, "%02x", ha->addr[i]); 372 373 seq_putc(seq, '\n'); 374 } 375 netif_addr_unlock_bh(dev); 376 return 0; 377 } 378 379 static const struct seq_operations dev_mc_seq_ops = { 380 .start = dev_seq_start, 381 .next = dev_seq_next, 382 .stop = dev_seq_stop, 383 .show = dev_mc_seq_show, 384 }; 385 386 static int dev_mc_seq_open(struct inode *inode, struct file *file) 387 { 388 return seq_open_net(inode, file, &dev_mc_seq_ops, 389 sizeof(struct seq_net_private)); 390 } 391 392 static const struct file_operations dev_mc_seq_fops = { 393 .owner = THIS_MODULE, 394 .open = dev_mc_seq_open, 395 .read = seq_read, 396 .llseek = seq_lseek, 397 .release = seq_release_net, 398 }; 399 400 static int __net_init dev_mc_net_init(struct net *net) 401 { 402 if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops)) 403 return -ENOMEM; 404 return 0; 405 } 406 407 static void __net_exit dev_mc_net_exit(struct net *net) 408 { 409 remove_proc_entry("dev_mcast", net->proc_net); 410 } 411 412 static struct pernet_operations __net_initdata dev_mc_net_ops = { 413 .init = dev_mc_net_init, 414 .exit = dev_mc_net_exit, 415 }; 416 417 int __init dev_proc_init(void) 418 { 419 int ret = register_pernet_subsys(&dev_proc_ops); 420 if (!ret) 421 return register_pernet_subsys(&dev_mc_net_ops); 422 return ret; 423 } 424