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 0, /* was cpu_collision */ 166 sd->received_rps, flow_limit_count); 167 return 0; 168 } 169 170 static const struct seq_operations dev_seq_ops = { 171 .start = dev_seq_start, 172 .next = dev_seq_next, 173 .stop = dev_seq_stop, 174 .show = dev_seq_show, 175 }; 176 177 static int dev_seq_open(struct inode *inode, struct file *file) 178 { 179 return seq_open_net(inode, file, &dev_seq_ops, 180 sizeof(struct seq_net_private)); 181 } 182 183 static const struct file_operations dev_seq_fops = { 184 .owner = THIS_MODULE, 185 .open = dev_seq_open, 186 .read = seq_read, 187 .llseek = seq_lseek, 188 .release = seq_release_net, 189 }; 190 191 static const struct seq_operations softnet_seq_ops = { 192 .start = softnet_seq_start, 193 .next = softnet_seq_next, 194 .stop = softnet_seq_stop, 195 .show = softnet_seq_show, 196 }; 197 198 static int softnet_seq_open(struct inode *inode, struct file *file) 199 { 200 return seq_open(file, &softnet_seq_ops); 201 } 202 203 static const struct file_operations softnet_seq_fops = { 204 .owner = THIS_MODULE, 205 .open = softnet_seq_open, 206 .read = seq_read, 207 .llseek = seq_lseek, 208 .release = seq_release, 209 }; 210 211 static void *ptype_get_idx(loff_t pos) 212 { 213 struct packet_type *pt = NULL; 214 loff_t i = 0; 215 int t; 216 217 list_for_each_entry_rcu(pt, &ptype_all, list) { 218 if (i == pos) 219 return pt; 220 ++i; 221 } 222 223 for (t = 0; t < PTYPE_HASH_SIZE; t++) { 224 list_for_each_entry_rcu(pt, &ptype_base[t], list) { 225 if (i == pos) 226 return pt; 227 ++i; 228 } 229 } 230 return NULL; 231 } 232 233 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) 234 __acquires(RCU) 235 { 236 rcu_read_lock(); 237 return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN; 238 } 239 240 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) 241 { 242 struct packet_type *pt; 243 struct list_head *nxt; 244 int hash; 245 246 ++*pos; 247 if (v == SEQ_START_TOKEN) 248 return ptype_get_idx(0); 249 250 pt = v; 251 nxt = pt->list.next; 252 if (pt->type == htons(ETH_P_ALL)) { 253 if (nxt != &ptype_all) 254 goto found; 255 hash = 0; 256 nxt = ptype_base[0].next; 257 } else 258 hash = ntohs(pt->type) & PTYPE_HASH_MASK; 259 260 while (nxt == &ptype_base[hash]) { 261 if (++hash >= PTYPE_HASH_SIZE) 262 return NULL; 263 nxt = ptype_base[hash].next; 264 } 265 found: 266 return list_entry(nxt, struct packet_type, list); 267 } 268 269 static void ptype_seq_stop(struct seq_file *seq, void *v) 270 __releases(RCU) 271 { 272 rcu_read_unlock(); 273 } 274 275 static int ptype_seq_show(struct seq_file *seq, void *v) 276 { 277 struct packet_type *pt = v; 278 279 if (v == SEQ_START_TOKEN) 280 seq_puts(seq, "Type Device Function\n"); 281 else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) { 282 if (pt->type == htons(ETH_P_ALL)) 283 seq_puts(seq, "ALL "); 284 else 285 seq_printf(seq, "%04x", ntohs(pt->type)); 286 287 seq_printf(seq, " %-8s %pf\n", 288 pt->dev ? pt->dev->name : "", pt->func); 289 } 290 291 return 0; 292 } 293 294 static const struct seq_operations ptype_seq_ops = { 295 .start = ptype_seq_start, 296 .next = ptype_seq_next, 297 .stop = ptype_seq_stop, 298 .show = ptype_seq_show, 299 }; 300 301 static int ptype_seq_open(struct inode *inode, struct file *file) 302 { 303 return seq_open_net(inode, file, &ptype_seq_ops, 304 sizeof(struct seq_net_private)); 305 } 306 307 static const struct file_operations ptype_seq_fops = { 308 .owner = THIS_MODULE, 309 .open = ptype_seq_open, 310 .read = seq_read, 311 .llseek = seq_lseek, 312 .release = seq_release_net, 313 }; 314 315 316 static int __net_init dev_proc_net_init(struct net *net) 317 { 318 int rc = -ENOMEM; 319 320 if (!proc_create("dev", S_IRUGO, net->proc_net, &dev_seq_fops)) 321 goto out; 322 if (!proc_create("softnet_stat", S_IRUGO, net->proc_net, 323 &softnet_seq_fops)) 324 goto out_dev; 325 if (!proc_create("ptype", S_IRUGO, net->proc_net, &ptype_seq_fops)) 326 goto out_softnet; 327 328 if (wext_proc_init(net)) 329 goto out_ptype; 330 rc = 0; 331 out: 332 return rc; 333 out_ptype: 334 remove_proc_entry("ptype", net->proc_net); 335 out_softnet: 336 remove_proc_entry("softnet_stat", net->proc_net); 337 out_dev: 338 remove_proc_entry("dev", net->proc_net); 339 goto out; 340 } 341 342 static void __net_exit dev_proc_net_exit(struct net *net) 343 { 344 wext_proc_exit(net); 345 346 remove_proc_entry("ptype", net->proc_net); 347 remove_proc_entry("softnet_stat", net->proc_net); 348 remove_proc_entry("dev", net->proc_net); 349 } 350 351 static struct pernet_operations __net_initdata dev_proc_ops = { 352 .init = dev_proc_net_init, 353 .exit = dev_proc_net_exit, 354 }; 355 356 static int dev_mc_seq_show(struct seq_file *seq, void *v) 357 { 358 struct netdev_hw_addr *ha; 359 struct net_device *dev = v; 360 361 if (v == SEQ_START_TOKEN) 362 return 0; 363 364 netif_addr_lock_bh(dev); 365 netdev_for_each_mc_addr(ha, dev) { 366 int i; 367 368 seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex, 369 dev->name, ha->refcount, ha->global_use); 370 371 for (i = 0; i < dev->addr_len; i++) 372 seq_printf(seq, "%02x", ha->addr[i]); 373 374 seq_putc(seq, '\n'); 375 } 376 netif_addr_unlock_bh(dev); 377 return 0; 378 } 379 380 static const struct seq_operations dev_mc_seq_ops = { 381 .start = dev_seq_start, 382 .next = dev_seq_next, 383 .stop = dev_seq_stop, 384 .show = dev_mc_seq_show, 385 }; 386 387 static int dev_mc_seq_open(struct inode *inode, struct file *file) 388 { 389 return seq_open_net(inode, file, &dev_mc_seq_ops, 390 sizeof(struct seq_net_private)); 391 } 392 393 static const struct file_operations dev_mc_seq_fops = { 394 .owner = THIS_MODULE, 395 .open = dev_mc_seq_open, 396 .read = seq_read, 397 .llseek = seq_lseek, 398 .release = seq_release_net, 399 }; 400 401 static int __net_init dev_mc_net_init(struct net *net) 402 { 403 if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops)) 404 return -ENOMEM; 405 return 0; 406 } 407 408 static void __net_exit dev_mc_net_exit(struct net *net) 409 { 410 remove_proc_entry("dev_mcast", net->proc_net); 411 } 412 413 static struct pernet_operations __net_initdata dev_mc_net_ops = { 414 .init = dev_mc_net_init, 415 .exit = dev_mc_net_exit, 416 }; 417 418 int __init dev_proc_init(void) 419 { 420 int ret = register_pernet_subsys(&dev_proc_ops); 421 if (!ret) 422 return register_pernet_subsys(&dev_mc_net_ops); 423 return ret; 424 } 425