1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/netdevice.h>
3 #include <linux/proc_fs.h>
4 #include <linux/seq_file.h>
7 #define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
9 #define get_bucket(x) ((x) >> BUCKET_SPACE)
10 #define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1))
11 #define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o))
13 extern struct list_head ptype_all __read_mostly;
14 extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
16 static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos)
18 struct net *net = seq_file_net(seq);
19 struct net_device *dev;
21 unsigned int count = 0, offset = get_offset(*pos);
23 h = &net->dev_name_head[get_bucket(*pos)];
24 hlist_for_each_entry_rcu(dev, h, name_hlist) {
25 if (++count == offset)
32 static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos)
34 struct net_device *dev;
38 dev = dev_from_same_bucket(seq, pos);
42 bucket = get_bucket(*pos) + 1;
43 *pos = set_bucket_offset(bucket, 1);
44 } while (bucket < NETDEV_HASHENTRIES);
50 * This is invoked by the /proc filesystem handler to display a device
53 static void *dev_seq_start(struct seq_file *seq, loff_t *pos)
58 return SEQ_START_TOKEN;
60 if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
63 return dev_from_bucket(seq, pos);
66 static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
69 return dev_from_bucket(seq, pos);
72 static void dev_seq_stop(struct seq_file *seq, void *v)
78 static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
80 struct rtnl_link_stats64 temp;
81 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
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,
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);
103 * Called from the PROCfs module. This now uses the new arbitrary sized
104 * /proc/net interface to create /proc/net/dev
106 static int dev_seq_show(struct seq_file *seq, void *v)
108 if (v == SEQ_START_TOKEN)
109 seq_puts(seq, "Inter-| Receive "
111 " face |bytes packets errs drop fifo frame "
112 "compressed multicast|bytes packets errs "
113 "drop fifo colls carrier compressed\n");
115 dev_seq_printf_stats(seq, v);
119 static struct softnet_data *softnet_get_online(loff_t *pos)
121 struct softnet_data *sd = NULL;
123 while (*pos < nr_cpu_ids)
124 if (cpu_online(*pos)) {
125 sd = &per_cpu(softnet_data, *pos);
132 static void *softnet_seq_start(struct seq_file *seq, loff_t *pos)
134 return softnet_get_online(pos);
137 static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
140 return softnet_get_online(pos);
143 static void softnet_seq_stop(struct seq_file *seq, void *v)
147 static int softnet_seq_show(struct seq_file *seq, void *v)
149 struct softnet_data *sd = v;
150 unsigned int flow_limit_count = 0;
152 #ifdef CONFIG_NET_FLOW_LIMIT
153 struct sd_flow_limit *fl;
156 fl = rcu_dereference(sd->flow_limit);
158 flow_limit_count = fl->count;
163 "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
164 sd->processed, sd->dropped, sd->time_squeeze, 0,
165 0, 0, 0, 0, /* was fastroute */
166 0, /* was cpu_collision */
167 sd->received_rps, flow_limit_count);
171 static const struct seq_operations dev_seq_ops = {
172 .start = dev_seq_start,
173 .next = dev_seq_next,
174 .stop = dev_seq_stop,
175 .show = dev_seq_show,
178 static const struct seq_operations softnet_seq_ops = {
179 .start = softnet_seq_start,
180 .next = softnet_seq_next,
181 .stop = softnet_seq_stop,
182 .show = softnet_seq_show,
185 static void *ptype_get_idx(struct seq_file *seq, loff_t pos)
187 struct list_head *ptype_list = NULL;
188 struct packet_type *pt = NULL;
189 struct net_device *dev;
193 for_each_netdev_rcu(seq_file_net(seq), dev) {
194 ptype_list = &dev->ptype_all;
195 list_for_each_entry_rcu(pt, ptype_list, list) {
202 list_for_each_entry_rcu(pt, &ptype_all, list) {
208 for (t = 0; t < PTYPE_HASH_SIZE; t++) {
209 list_for_each_entry_rcu(pt, &ptype_base[t], list) {
218 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
222 return *pos ? ptype_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
225 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
227 struct net_device *dev;
228 struct packet_type *pt;
229 struct list_head *nxt;
233 if (v == SEQ_START_TOKEN)
234 return ptype_get_idx(seq, 0);
239 if (nxt != &pt->dev->ptype_all)
243 for_each_netdev_continue_rcu(seq_file_net(seq), dev) {
244 if (!list_empty(&dev->ptype_all)) {
245 nxt = dev->ptype_all.next;
250 nxt = ptype_all.next;
254 if (pt->type == htons(ETH_P_ALL)) {
256 if (nxt != &ptype_all)
259 nxt = ptype_base[0].next;
261 hash = ntohs(pt->type) & PTYPE_HASH_MASK;
263 while (nxt == &ptype_base[hash]) {
264 if (++hash >= PTYPE_HASH_SIZE)
266 nxt = ptype_base[hash].next;
269 return list_entry(nxt, struct packet_type, list);
272 static void ptype_seq_stop(struct seq_file *seq, void *v)
278 static int ptype_seq_show(struct seq_file *seq, void *v)
280 struct packet_type *pt = v;
282 if (v == SEQ_START_TOKEN)
283 seq_puts(seq, "Type Device Function\n");
284 else if ((!pt->af_packet_net || net_eq(pt->af_packet_net, seq_file_net(seq))) &&
285 (!pt->dev || net_eq(dev_net(pt->dev), seq_file_net(seq)))) {
286 if (pt->type == htons(ETH_P_ALL))
287 seq_puts(seq, "ALL ");
289 seq_printf(seq, "%04x", ntohs(pt->type));
291 seq_printf(seq, " %-8s %pf\n",
292 pt->dev ? pt->dev->name : "", pt->func);
298 static const struct seq_operations ptype_seq_ops = {
299 .start = ptype_seq_start,
300 .next = ptype_seq_next,
301 .stop = ptype_seq_stop,
302 .show = ptype_seq_show,
305 static int __net_init dev_proc_net_init(struct net *net)
309 if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops,
310 sizeof(struct seq_net_private)))
312 if (!proc_create_seq("softnet_stat", 0444, net->proc_net,
315 if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
316 sizeof(struct seq_net_private)))
319 if (wext_proc_init(net))
325 remove_proc_entry("ptype", net->proc_net);
327 remove_proc_entry("softnet_stat", net->proc_net);
329 remove_proc_entry("dev", net->proc_net);
333 static void __net_exit dev_proc_net_exit(struct net *net)
337 remove_proc_entry("ptype", net->proc_net);
338 remove_proc_entry("softnet_stat", net->proc_net);
339 remove_proc_entry("dev", net->proc_net);
342 static struct pernet_operations __net_initdata dev_proc_ops = {
343 .init = dev_proc_net_init,
344 .exit = dev_proc_net_exit,
347 static int dev_mc_seq_show(struct seq_file *seq, void *v)
349 struct netdev_hw_addr *ha;
350 struct net_device *dev = v;
352 if (v == SEQ_START_TOKEN)
355 netif_addr_lock_bh(dev);
356 netdev_for_each_mc_addr(ha, dev) {
357 seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n",
358 dev->ifindex, dev->name,
359 ha->refcount, ha->global_use,
360 (int)dev->addr_len, ha->addr);
362 netif_addr_unlock_bh(dev);
366 static const struct seq_operations dev_mc_seq_ops = {
367 .start = dev_seq_start,
368 .next = dev_seq_next,
369 .stop = dev_seq_stop,
370 .show = dev_mc_seq_show,
373 static int __net_init dev_mc_net_init(struct net *net)
375 if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops,
376 sizeof(struct seq_net_private)))
381 static void __net_exit dev_mc_net_exit(struct net *net)
383 remove_proc_entry("dev_mcast", net->proc_net);
386 static struct pernet_operations __net_initdata dev_mc_net_ops = {
387 .init = dev_mc_net_init,
388 .exit = dev_mc_net_exit,
391 int __init dev_proc_init(void)
393 int ret = register_pernet_subsys(&dev_proc_ops);
395 return register_pernet_subsys(&dev_mc_net_ops);