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 #include <net/hotdata.h> 7 8 #include "dev.h" 9 10 static void *dev_seq_from_index(struct seq_file *seq, loff_t *pos) 11 { 12 unsigned long ifindex = *pos; 13 struct net_device *dev; 14 15 for_each_netdev_dump(seq_file_net(seq), dev, ifindex) { 16 *pos = dev->ifindex; 17 return dev; 18 } 19 return NULL; 20 } 21 22 static void *dev_seq_start(struct seq_file *seq, loff_t *pos) 23 __acquires(RCU) 24 { 25 rcu_read_lock(); 26 if (!*pos) 27 return SEQ_START_TOKEN; 28 29 return dev_seq_from_index(seq, pos); 30 } 31 32 static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) 33 { 34 ++*pos; 35 return dev_seq_from_index(seq, pos); 36 } 37 38 static void dev_seq_stop(struct seq_file *seq, void *v) 39 __releases(RCU) 40 { 41 rcu_read_unlock(); 42 } 43 44 static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev) 45 { 46 struct rtnl_link_stats64 temp; 47 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); 48 49 seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu " 50 "%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n", 51 dev->name, stats->rx_bytes, stats->rx_packets, 52 stats->rx_errors, 53 stats->rx_dropped + stats->rx_missed_errors, 54 stats->rx_fifo_errors, 55 stats->rx_length_errors + stats->rx_over_errors + 56 stats->rx_crc_errors + stats->rx_frame_errors, 57 stats->rx_compressed, stats->multicast, 58 stats->tx_bytes, stats->tx_packets, 59 stats->tx_errors, stats->tx_dropped, 60 stats->tx_fifo_errors, stats->collisions, 61 stats->tx_carrier_errors + 62 stats->tx_aborted_errors + 63 stats->tx_window_errors + 64 stats->tx_heartbeat_errors, 65 stats->tx_compressed); 66 } 67 68 /* 69 * Called from the PROCfs module. This now uses the new arbitrary sized 70 * /proc/net interface to create /proc/net/dev 71 */ 72 static int dev_seq_show(struct seq_file *seq, void *v) 73 { 74 if (v == SEQ_START_TOKEN) 75 seq_puts(seq, "Inter-| Receive " 76 " | Transmit\n" 77 " face |bytes packets errs drop fifo frame " 78 "compressed multicast|bytes packets errs " 79 "drop fifo colls carrier compressed\n"); 80 else 81 dev_seq_printf_stats(seq, v); 82 return 0; 83 } 84 85 static u32 softnet_input_pkt_queue_len(struct softnet_data *sd) 86 { 87 return skb_queue_len_lockless(&sd->input_pkt_queue); 88 } 89 90 static u32 softnet_process_queue_len(struct softnet_data *sd) 91 { 92 return skb_queue_len_lockless(&sd->process_queue); 93 } 94 95 static struct softnet_data *softnet_get_online(loff_t *pos) 96 { 97 struct softnet_data *sd = NULL; 98 99 while (*pos < nr_cpu_ids) 100 if (cpu_online(*pos)) { 101 sd = &per_cpu(softnet_data, *pos); 102 break; 103 } else 104 ++*pos; 105 return sd; 106 } 107 108 static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) 109 { 110 return softnet_get_online(pos); 111 } 112 113 static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) 114 { 115 ++*pos; 116 return softnet_get_online(pos); 117 } 118 119 static void softnet_seq_stop(struct seq_file *seq, void *v) 120 { 121 } 122 123 static int softnet_seq_show(struct seq_file *seq, void *v) 124 { 125 struct softnet_data *sd = v; 126 u32 input_qlen = softnet_input_pkt_queue_len(sd); 127 u32 process_qlen = softnet_process_queue_len(sd); 128 unsigned int flow_limit_count = 0; 129 130 #ifdef CONFIG_NET_FLOW_LIMIT 131 struct sd_flow_limit *fl; 132 133 rcu_read_lock(); 134 fl = rcu_dereference(sd->flow_limit); 135 if (fl) 136 flow_limit_count = fl->count; 137 rcu_read_unlock(); 138 #endif 139 140 /* the index is the CPU id owing this sd. Since offline CPUs are not 141 * displayed, it would be othrwise not trivial for the user-space 142 * mapping the data a specific CPU 143 */ 144 seq_printf(seq, 145 "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x " 146 "%08x %08x\n", 147 sd->processed, sd->dropped, sd->time_squeeze, 0, 148 0, 0, 0, 0, /* was fastroute */ 149 0, /* was cpu_collision */ 150 sd->received_rps, flow_limit_count, 151 input_qlen + process_qlen, (int)seq->index, 152 input_qlen, process_qlen); 153 return 0; 154 } 155 156 static const struct seq_operations dev_seq_ops = { 157 .start = dev_seq_start, 158 .next = dev_seq_next, 159 .stop = dev_seq_stop, 160 .show = dev_seq_show, 161 }; 162 163 static const struct seq_operations softnet_seq_ops = { 164 .start = softnet_seq_start, 165 .next = softnet_seq_next, 166 .stop = softnet_seq_stop, 167 .show = softnet_seq_show, 168 }; 169 170 static void *ptype_get_idx(struct seq_file *seq, loff_t pos) 171 { 172 struct list_head *ptype_list = NULL; 173 struct packet_type *pt = NULL; 174 struct net_device *dev; 175 loff_t i = 0; 176 int t; 177 178 for_each_netdev_rcu(seq_file_net(seq), dev) { 179 ptype_list = &dev->ptype_all; 180 list_for_each_entry_rcu(pt, ptype_list, list) { 181 if (i == pos) 182 return pt; 183 ++i; 184 } 185 } 186 187 list_for_each_entry_rcu(pt, &net_hotdata.ptype_all, list) { 188 if (i == pos) 189 return pt; 190 ++i; 191 } 192 193 for (t = 0; t < PTYPE_HASH_SIZE; t++) { 194 list_for_each_entry_rcu(pt, &ptype_base[t], list) { 195 if (i == pos) 196 return pt; 197 ++i; 198 } 199 } 200 return NULL; 201 } 202 203 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) 204 __acquires(RCU) 205 { 206 rcu_read_lock(); 207 return *pos ? ptype_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; 208 } 209 210 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) 211 { 212 struct net_device *dev; 213 struct packet_type *pt; 214 struct list_head *nxt; 215 int hash; 216 217 ++*pos; 218 if (v == SEQ_START_TOKEN) 219 return ptype_get_idx(seq, 0); 220 221 pt = v; 222 nxt = pt->list.next; 223 if (pt->dev) { 224 if (nxt != &pt->dev->ptype_all) 225 goto found; 226 227 dev = pt->dev; 228 for_each_netdev_continue_rcu(seq_file_net(seq), dev) { 229 if (!list_empty(&dev->ptype_all)) { 230 nxt = dev->ptype_all.next; 231 goto found; 232 } 233 } 234 235 nxt = net_hotdata.ptype_all.next; 236 goto ptype_all; 237 } 238 239 if (pt->type == htons(ETH_P_ALL)) { 240 ptype_all: 241 if (nxt != &net_hotdata.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->af_packet_net || net_eq(pt->af_packet_net, seq_file_net(seq))) && 270 (!pt->dev || net_eq(dev_net(pt->dev), seq_file_net(seq)))) { 271 if (pt->type == htons(ETH_P_ALL)) 272 seq_puts(seq, "ALL "); 273 else 274 seq_printf(seq, "%04x", ntohs(pt->type)); 275 276 seq_printf(seq, " %-8s %ps\n", 277 pt->dev ? pt->dev->name : "", pt->func); 278 } 279 280 return 0; 281 } 282 283 static const struct seq_operations ptype_seq_ops = { 284 .start = ptype_seq_start, 285 .next = ptype_seq_next, 286 .stop = ptype_seq_stop, 287 .show = ptype_seq_show, 288 }; 289 290 static int __net_init dev_proc_net_init(struct net *net) 291 { 292 int rc = -ENOMEM; 293 294 if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops, 295 sizeof(struct seq_net_private))) 296 goto out; 297 if (!proc_create_seq("softnet_stat", 0444, net->proc_net, 298 &softnet_seq_ops)) 299 goto out_dev; 300 if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops, 301 sizeof(struct seq_net_private))) 302 goto out_softnet; 303 304 if (wext_proc_init(net)) 305 goto out_ptype; 306 rc = 0; 307 out: 308 return rc; 309 out_ptype: 310 remove_proc_entry("ptype", net->proc_net); 311 out_softnet: 312 remove_proc_entry("softnet_stat", net->proc_net); 313 out_dev: 314 remove_proc_entry("dev", net->proc_net); 315 goto out; 316 } 317 318 static void __net_exit dev_proc_net_exit(struct net *net) 319 { 320 wext_proc_exit(net); 321 322 remove_proc_entry("ptype", net->proc_net); 323 remove_proc_entry("softnet_stat", net->proc_net); 324 remove_proc_entry("dev", net->proc_net); 325 } 326 327 static struct pernet_operations __net_initdata dev_proc_ops = { 328 .init = dev_proc_net_init, 329 .exit = dev_proc_net_exit, 330 }; 331 332 static int dev_mc_seq_show(struct seq_file *seq, void *v) 333 { 334 struct netdev_hw_addr *ha; 335 struct net_device *dev = v; 336 337 if (v == SEQ_START_TOKEN) 338 return 0; 339 340 netif_addr_lock_bh(dev); 341 netdev_for_each_mc_addr(ha, dev) { 342 seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n", 343 dev->ifindex, dev->name, 344 ha->refcount, ha->global_use, 345 (int)dev->addr_len, ha->addr); 346 } 347 netif_addr_unlock_bh(dev); 348 return 0; 349 } 350 351 static const struct seq_operations dev_mc_seq_ops = { 352 .start = dev_seq_start, 353 .next = dev_seq_next, 354 .stop = dev_seq_stop, 355 .show = dev_mc_seq_show, 356 }; 357 358 static int __net_init dev_mc_net_init(struct net *net) 359 { 360 if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops, 361 sizeof(struct seq_net_private))) 362 return -ENOMEM; 363 return 0; 364 } 365 366 static void __net_exit dev_mc_net_exit(struct net *net) 367 { 368 remove_proc_entry("dev_mcast", net->proc_net); 369 } 370 371 static struct pernet_operations __net_initdata dev_mc_net_ops = { 372 .init = dev_mc_net_init, 373 .exit = dev_mc_net_exit, 374 }; 375 376 int __init dev_proc_init(void) 377 { 378 int ret = register_pernet_subsys(&dev_proc_ops); 379 if (!ret) 380 return register_pernet_subsys(&dev_mc_net_ops); 381 return ret; 382 } 383