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 static int dev_mc_seq_show(struct seq_file *seq, void *v) 345 { 346 struct netdev_hw_addr *ha; 347 struct net_device *dev = v; 348 349 if (v == SEQ_START_TOKEN) 350 return 0; 351 352 netif_addr_lock_bh(dev); 353 netdev_for_each_mc_addr(ha, dev) { 354 int i; 355 356 seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex, 357 dev->name, ha->refcount, ha->global_use); 358 359 for (i = 0; i < dev->addr_len; i++) 360 seq_printf(seq, "%02x", ha->addr[i]); 361 362 seq_putc(seq, '\n'); 363 } 364 netif_addr_unlock_bh(dev); 365 return 0; 366 } 367 368 static const struct seq_operations dev_mc_seq_ops = { 369 .start = dev_seq_start, 370 .next = dev_seq_next, 371 .stop = dev_seq_stop, 372 .show = dev_mc_seq_show, 373 }; 374 375 static int dev_mc_seq_open(struct inode *inode, struct file *file) 376 { 377 return seq_open_net(inode, file, &dev_mc_seq_ops, 378 sizeof(struct seq_net_private)); 379 } 380 381 static const struct file_operations dev_mc_seq_fops = { 382 .owner = THIS_MODULE, 383 .open = dev_mc_seq_open, 384 .read = seq_read, 385 .llseek = seq_lseek, 386 .release = seq_release_net, 387 }; 388 389 static int __net_init dev_mc_net_init(struct net *net) 390 { 391 if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops)) 392 return -ENOMEM; 393 return 0; 394 } 395 396 static void __net_exit dev_mc_net_exit(struct net *net) 397 { 398 remove_proc_entry("dev_mcast", net->proc_net); 399 } 400 401 static struct pernet_operations __net_initdata dev_mc_net_ops = { 402 .init = dev_mc_net_init, 403 .exit = dev_mc_net_exit, 404 }; 405 406 int __init dev_proc_init(void) 407 { 408 int ret = register_pernet_subsys(&dev_proc_ops); 409 if (!ret) 410 return register_pernet_subsys(&dev_mc_net_ops); 411 return ret; 412 } 413