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, atomic_read(&sd->dropped), 148 sd->time_squeeze, 0, 149 0, 0, 0, 0, /* was fastroute */ 150 0, /* was cpu_collision */ 151 sd->received_rps, flow_limit_count, 152 input_qlen + process_qlen, (int)seq->index, 153 input_qlen, process_qlen); 154 return 0; 155 } 156 157 static const struct seq_operations dev_seq_ops = { 158 .start = dev_seq_start, 159 .next = dev_seq_next, 160 .stop = dev_seq_stop, 161 .show = dev_seq_show, 162 }; 163 164 static const struct seq_operations softnet_seq_ops = { 165 .start = softnet_seq_start, 166 .next = softnet_seq_next, 167 .stop = softnet_seq_stop, 168 .show = softnet_seq_show, 169 }; 170 171 static void *ptype_get_idx(struct seq_file *seq, loff_t pos) 172 { 173 struct list_head *ptype_list = NULL; 174 struct packet_type *pt = NULL; 175 struct net_device *dev; 176 loff_t i = 0; 177 int t; 178 179 for_each_netdev_rcu(seq_file_net(seq), dev) { 180 ptype_list = &dev->ptype_all; 181 list_for_each_entry_rcu(pt, ptype_list, list) { 182 if (i == pos) 183 return pt; 184 ++i; 185 } 186 } 187 188 list_for_each_entry_rcu(pt, &net_hotdata.ptype_all, list) { 189 if (i == pos) 190 return pt; 191 ++i; 192 } 193 194 for (t = 0; t < PTYPE_HASH_SIZE; t++) { 195 list_for_each_entry_rcu(pt, &ptype_base[t], list) { 196 if (i == pos) 197 return pt; 198 ++i; 199 } 200 } 201 return NULL; 202 } 203 204 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) 205 __acquires(RCU) 206 { 207 rcu_read_lock(); 208 return *pos ? ptype_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; 209 } 210 211 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) 212 { 213 struct net_device *dev; 214 struct packet_type *pt; 215 struct list_head *nxt; 216 int hash; 217 218 ++*pos; 219 if (v == SEQ_START_TOKEN) 220 return ptype_get_idx(seq, 0); 221 222 pt = v; 223 nxt = pt->list.next; 224 if (pt->dev) { 225 if (nxt != &pt->dev->ptype_all) 226 goto found; 227 228 dev = pt->dev; 229 for_each_netdev_continue_rcu(seq_file_net(seq), dev) { 230 if (!list_empty(&dev->ptype_all)) { 231 nxt = dev->ptype_all.next; 232 goto found; 233 } 234 } 235 236 nxt = net_hotdata.ptype_all.next; 237 goto ptype_all; 238 } 239 240 if (pt->type == htons(ETH_P_ALL)) { 241 ptype_all: 242 if (nxt != &net_hotdata.ptype_all) 243 goto found; 244 hash = 0; 245 nxt = ptype_base[0].next; 246 } else 247 hash = ntohs(pt->type) & PTYPE_HASH_MASK; 248 249 while (nxt == &ptype_base[hash]) { 250 if (++hash >= PTYPE_HASH_SIZE) 251 return NULL; 252 nxt = ptype_base[hash].next; 253 } 254 found: 255 return list_entry(nxt, struct packet_type, list); 256 } 257 258 static void ptype_seq_stop(struct seq_file *seq, void *v) 259 __releases(RCU) 260 { 261 rcu_read_unlock(); 262 } 263 264 static int ptype_seq_show(struct seq_file *seq, void *v) 265 { 266 struct packet_type *pt = v; 267 268 if (v == SEQ_START_TOKEN) 269 seq_puts(seq, "Type Device Function\n"); 270 else if ((!pt->af_packet_net || net_eq(pt->af_packet_net, seq_file_net(seq))) && 271 (!pt->dev || net_eq(dev_net(pt->dev), seq_file_net(seq)))) { 272 if (pt->type == htons(ETH_P_ALL)) 273 seq_puts(seq, "ALL "); 274 else 275 seq_printf(seq, "%04x", ntohs(pt->type)); 276 277 seq_printf(seq, " %-8s %ps\n", 278 pt->dev ? pt->dev->name : "", pt->func); 279 } 280 281 return 0; 282 } 283 284 static const struct seq_operations ptype_seq_ops = { 285 .start = ptype_seq_start, 286 .next = ptype_seq_next, 287 .stop = ptype_seq_stop, 288 .show = ptype_seq_show, 289 }; 290 291 static int __net_init dev_proc_net_init(struct net *net) 292 { 293 int rc = -ENOMEM; 294 295 if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops, 296 sizeof(struct seq_net_private))) 297 goto out; 298 if (!proc_create_seq("softnet_stat", 0444, net->proc_net, 299 &softnet_seq_ops)) 300 goto out_dev; 301 if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops, 302 sizeof(struct seq_net_private))) 303 goto out_softnet; 304 305 if (wext_proc_init(net)) 306 goto out_ptype; 307 rc = 0; 308 out: 309 return rc; 310 out_ptype: 311 remove_proc_entry("ptype", net->proc_net); 312 out_softnet: 313 remove_proc_entry("softnet_stat", net->proc_net); 314 out_dev: 315 remove_proc_entry("dev", net->proc_net); 316 goto out; 317 } 318 319 static void __net_exit dev_proc_net_exit(struct net *net) 320 { 321 wext_proc_exit(net); 322 323 remove_proc_entry("ptype", net->proc_net); 324 remove_proc_entry("softnet_stat", net->proc_net); 325 remove_proc_entry("dev", net->proc_net); 326 } 327 328 static struct pernet_operations __net_initdata dev_proc_ops = { 329 .init = dev_proc_net_init, 330 .exit = dev_proc_net_exit, 331 }; 332 333 static int dev_mc_seq_show(struct seq_file *seq, void *v) 334 { 335 struct netdev_hw_addr *ha; 336 struct net_device *dev = v; 337 338 if (v == SEQ_START_TOKEN) 339 return 0; 340 341 netif_addr_lock_bh(dev); 342 netdev_for_each_mc_addr(ha, dev) { 343 seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n", 344 dev->ifindex, dev->name, 345 ha->refcount, ha->global_use, 346 (int)dev->addr_len, ha->addr); 347 } 348 netif_addr_unlock_bh(dev); 349 return 0; 350 } 351 352 static const struct seq_operations dev_mc_seq_ops = { 353 .start = dev_seq_start, 354 .next = dev_seq_next, 355 .stop = dev_seq_stop, 356 .show = dev_mc_seq_show, 357 }; 358 359 static int __net_init dev_mc_net_init(struct net *net) 360 { 361 if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops, 362 sizeof(struct seq_net_private))) 363 return -ENOMEM; 364 return 0; 365 } 366 367 static void __net_exit dev_mc_net_exit(struct net *net) 368 { 369 remove_proc_entry("dev_mcast", net->proc_net); 370 } 371 372 static struct pernet_operations __net_initdata dev_mc_net_ops = { 373 .init = dev_mc_net_init, 374 .exit = dev_mc_net_exit, 375 }; 376 377 int __init dev_proc_init(void) 378 { 379 int ret = register_pernet_subsys(&dev_proc_ops); 380 if (!ret) 381 return register_pernet_subsys(&dev_mc_net_ops); 382 return ret; 383 } 384