1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/netdevice.h> 3 #include <linux/proc_fs.h> 4 #include <linux/seq_file.h> 5 #include <net/wext.h> 6 7 #include "dev.h" 8 9 static void *dev_seq_from_index(struct seq_file *seq, loff_t *pos) 10 { 11 unsigned long ifindex = *pos; 12 struct net_device *dev; 13 14 for_each_netdev_dump(seq_file_net(seq), dev, ifindex) { 15 *pos = dev->ifindex; 16 return dev; 17 } 18 return NULL; 19 } 20 21 static void *dev_seq_start(struct seq_file *seq, loff_t *pos) 22 __acquires(RCU) 23 { 24 rcu_read_lock(); 25 if (!*pos) 26 return SEQ_START_TOKEN; 27 28 return dev_seq_from_index(seq, pos); 29 } 30 31 static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) 32 { 33 ++*pos; 34 return dev_seq_from_index(seq, pos); 35 } 36 37 static void dev_seq_stop(struct seq_file *seq, void *v) 38 __releases(RCU) 39 { 40 rcu_read_unlock(); 41 } 42 43 static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev) 44 { 45 struct rtnl_link_stats64 temp; 46 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); 47 48 seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu " 49 "%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n", 50 dev->name, stats->rx_bytes, stats->rx_packets, 51 stats->rx_errors, 52 stats->rx_dropped + stats->rx_missed_errors, 53 stats->rx_fifo_errors, 54 stats->rx_length_errors + stats->rx_over_errors + 55 stats->rx_crc_errors + stats->rx_frame_errors, 56 stats->rx_compressed, stats->multicast, 57 stats->tx_bytes, stats->tx_packets, 58 stats->tx_errors, stats->tx_dropped, 59 stats->tx_fifo_errors, stats->collisions, 60 stats->tx_carrier_errors + 61 stats->tx_aborted_errors + 62 stats->tx_window_errors + 63 stats->tx_heartbeat_errors, 64 stats->tx_compressed); 65 } 66 67 /* 68 * Called from the PROCfs module. This now uses the new arbitrary sized 69 * /proc/net interface to create /proc/net/dev 70 */ 71 static int dev_seq_show(struct seq_file *seq, void *v) 72 { 73 if (v == SEQ_START_TOKEN) 74 seq_puts(seq, "Inter-| Receive " 75 " | Transmit\n" 76 " face |bytes packets errs drop fifo frame " 77 "compressed multicast|bytes packets errs " 78 "drop fifo colls carrier compressed\n"); 79 else 80 dev_seq_printf_stats(seq, v); 81 return 0; 82 } 83 84 static u32 softnet_input_pkt_queue_len(struct softnet_data *sd) 85 { 86 return skb_queue_len_lockless(&sd->input_pkt_queue); 87 } 88 89 static u32 softnet_process_queue_len(struct softnet_data *sd) 90 { 91 return skb_queue_len_lockless(&sd->process_queue); 92 } 93 94 static struct softnet_data *softnet_get_online(loff_t *pos) 95 { 96 struct softnet_data *sd = NULL; 97 98 while (*pos < nr_cpu_ids) 99 if (cpu_online(*pos)) { 100 sd = &per_cpu(softnet_data, *pos); 101 break; 102 } else 103 ++*pos; 104 return sd; 105 } 106 107 static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) 108 { 109 return softnet_get_online(pos); 110 } 111 112 static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) 113 { 114 ++*pos; 115 return softnet_get_online(pos); 116 } 117 118 static void softnet_seq_stop(struct seq_file *seq, void *v) 119 { 120 } 121 122 static int softnet_seq_show(struct seq_file *seq, void *v) 123 { 124 struct softnet_data *sd = v; 125 u32 input_qlen = softnet_input_pkt_queue_len(sd); 126 u32 process_qlen = softnet_process_queue_len(sd); 127 unsigned int flow_limit_count = 0; 128 129 #ifdef CONFIG_NET_FLOW_LIMIT 130 struct sd_flow_limit *fl; 131 132 rcu_read_lock(); 133 fl = rcu_dereference(sd->flow_limit); 134 if (fl) 135 flow_limit_count = fl->count; 136 rcu_read_unlock(); 137 #endif 138 139 /* the index is the CPU id owing this sd. Since offline CPUs are not 140 * displayed, it would be othrwise not trivial for the user-space 141 * mapping the data a specific CPU 142 */ 143 seq_printf(seq, 144 "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x " 145 "%08x %08x\n", 146 sd->processed, sd->dropped, sd->time_squeeze, 0, 147 0, 0, 0, 0, /* was fastroute */ 148 0, /* was cpu_collision */ 149 sd->received_rps, flow_limit_count, 150 input_qlen + process_qlen, (int)seq->index, 151 input_qlen, process_qlen); 152 return 0; 153 } 154 155 static const struct seq_operations dev_seq_ops = { 156 .start = dev_seq_start, 157 .next = dev_seq_next, 158 .stop = dev_seq_stop, 159 .show = dev_seq_show, 160 }; 161 162 static const struct seq_operations softnet_seq_ops = { 163 .start = softnet_seq_start, 164 .next = softnet_seq_next, 165 .stop = softnet_seq_stop, 166 .show = softnet_seq_show, 167 }; 168 169 static void *ptype_get_idx(struct seq_file *seq, loff_t pos) 170 { 171 struct list_head *ptype_list = NULL; 172 struct packet_type *pt = NULL; 173 struct net_device *dev; 174 loff_t i = 0; 175 int t; 176 177 for_each_netdev_rcu(seq_file_net(seq), dev) { 178 ptype_list = &dev->ptype_all; 179 list_for_each_entry_rcu(pt, ptype_list, list) { 180 if (i == pos) 181 return pt; 182 ++i; 183 } 184 } 185 186 list_for_each_entry_rcu(pt, &ptype_all, list) { 187 if (i == pos) 188 return pt; 189 ++i; 190 } 191 192 for (t = 0; t < PTYPE_HASH_SIZE; t++) { 193 list_for_each_entry_rcu(pt, &ptype_base[t], list) { 194 if (i == pos) 195 return pt; 196 ++i; 197 } 198 } 199 return NULL; 200 } 201 202 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) 203 __acquires(RCU) 204 { 205 rcu_read_lock(); 206 return *pos ? ptype_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; 207 } 208 209 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) 210 { 211 struct net_device *dev; 212 struct packet_type *pt; 213 struct list_head *nxt; 214 int hash; 215 216 ++*pos; 217 if (v == SEQ_START_TOKEN) 218 return ptype_get_idx(seq, 0); 219 220 pt = v; 221 nxt = pt->list.next; 222 if (pt->dev) { 223 if (nxt != &pt->dev->ptype_all) 224 goto found; 225 226 dev = pt->dev; 227 for_each_netdev_continue_rcu(seq_file_net(seq), dev) { 228 if (!list_empty(&dev->ptype_all)) { 229 nxt = dev->ptype_all.next; 230 goto found; 231 } 232 } 233 234 nxt = ptype_all.next; 235 goto ptype_all; 236 } 237 238 if (pt->type == htons(ETH_P_ALL)) { 239 ptype_all: 240 if (nxt != &ptype_all) 241 goto found; 242 hash = 0; 243 nxt = ptype_base[0].next; 244 } else 245 hash = ntohs(pt->type) & PTYPE_HASH_MASK; 246 247 while (nxt == &ptype_base[hash]) { 248 if (++hash >= PTYPE_HASH_SIZE) 249 return NULL; 250 nxt = ptype_base[hash].next; 251 } 252 found: 253 return list_entry(nxt, struct packet_type, list); 254 } 255 256 static void ptype_seq_stop(struct seq_file *seq, void *v) 257 __releases(RCU) 258 { 259 rcu_read_unlock(); 260 } 261 262 static int ptype_seq_show(struct seq_file *seq, void *v) 263 { 264 struct packet_type *pt = v; 265 266 if (v == SEQ_START_TOKEN) 267 seq_puts(seq, "Type Device Function\n"); 268 else if ((!pt->af_packet_net || net_eq(pt->af_packet_net, seq_file_net(seq))) && 269 (!pt->dev || net_eq(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 %ps\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 __net_init dev_proc_net_init(struct net *net) 290 { 291 int rc = -ENOMEM; 292 293 if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops, 294 sizeof(struct seq_net_private))) 295 goto out; 296 if (!proc_create_seq("softnet_stat", 0444, net->proc_net, 297 &softnet_seq_ops)) 298 goto out_dev; 299 if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops, 300 sizeof(struct seq_net_private))) 301 goto out_softnet; 302 303 if (wext_proc_init(net)) 304 goto out_ptype; 305 rc = 0; 306 out: 307 return rc; 308 out_ptype: 309 remove_proc_entry("ptype", net->proc_net); 310 out_softnet: 311 remove_proc_entry("softnet_stat", net->proc_net); 312 out_dev: 313 remove_proc_entry("dev", net->proc_net); 314 goto out; 315 } 316 317 static void __net_exit dev_proc_net_exit(struct net *net) 318 { 319 wext_proc_exit(net); 320 321 remove_proc_entry("ptype", net->proc_net); 322 remove_proc_entry("softnet_stat", net->proc_net); 323 remove_proc_entry("dev", net->proc_net); 324 } 325 326 static struct pernet_operations __net_initdata dev_proc_ops = { 327 .init = dev_proc_net_init, 328 .exit = dev_proc_net_exit, 329 }; 330 331 static int dev_mc_seq_show(struct seq_file *seq, void *v) 332 { 333 struct netdev_hw_addr *ha; 334 struct net_device *dev = v; 335 336 if (v == SEQ_START_TOKEN) 337 return 0; 338 339 netif_addr_lock_bh(dev); 340 netdev_for_each_mc_addr(ha, dev) { 341 seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n", 342 dev->ifindex, dev->name, 343 ha->refcount, ha->global_use, 344 (int)dev->addr_len, ha->addr); 345 } 346 netif_addr_unlock_bh(dev); 347 return 0; 348 } 349 350 static const struct seq_operations dev_mc_seq_ops = { 351 .start = dev_seq_start, 352 .next = dev_seq_next, 353 .stop = dev_seq_stop, 354 .show = dev_mc_seq_show, 355 }; 356 357 static int __net_init dev_mc_net_init(struct net *net) 358 { 359 if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops, 360 sizeof(struct seq_net_private))) 361 return -ENOMEM; 362 return 0; 363 } 364 365 static void __net_exit dev_mc_net_exit(struct net *net) 366 { 367 remove_proc_entry("dev_mcast", net->proc_net); 368 } 369 370 static struct pernet_operations __net_initdata dev_mc_net_ops = { 371 .init = dev_mc_net_init, 372 .exit = dev_mc_net_exit, 373 }; 374 375 int __init dev_proc_init(void) 376 { 377 int ret = register_pernet_subsys(&dev_proc_ops); 378 if (!ret) 379 return register_pernet_subsys(&dev_mc_net_ops); 380 return ret; 381 } 382