1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/netdevice.h>
3 #include <linux/proc_fs.h>
4 #include <linux/seq_file.h>
9 #define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
11 #define get_bucket(x) ((x) >> BUCKET_SPACE)
12 #define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1))
13 #define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o))
15 static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos)
17 struct net *net = seq_file_net(seq);
18 struct net_device *dev;
20 unsigned int count = 0, offset = get_offset(*pos);
22 h = &net->dev_index_head[get_bucket(*pos)];
23 hlist_for_each_entry_rcu(dev, h, index_hlist) {
24 if (++count == offset)
31 static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos)
33 struct net_device *dev;
37 dev = dev_from_same_bucket(seq, pos);
41 bucket = get_bucket(*pos) + 1;
42 *pos = set_bucket_offset(bucket, 1);
43 } while (bucket < NETDEV_HASHENTRIES);
49 * This is invoked by the /proc filesystem handler to display a device
52 static void *dev_seq_start(struct seq_file *seq, loff_t *pos)
57 return SEQ_START_TOKEN;
59 if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
62 return dev_from_bucket(seq, pos);
65 static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
68 return dev_from_bucket(seq, pos);
71 static void dev_seq_stop(struct seq_file *seq, void *v)
77 static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
79 struct rtnl_link_stats64 temp;
80 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
82 seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu "
83 "%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n",
84 dev->name, stats->rx_bytes, stats->rx_packets,
86 stats->rx_dropped + stats->rx_missed_errors,
87 stats->rx_fifo_errors,
88 stats->rx_length_errors + stats->rx_over_errors +
89 stats->rx_crc_errors + stats->rx_frame_errors,
90 stats->rx_compressed, stats->multicast,
91 stats->tx_bytes, stats->tx_packets,
92 stats->tx_errors, stats->tx_dropped,
93 stats->tx_fifo_errors, stats->collisions,
94 stats->tx_carrier_errors +
95 stats->tx_aborted_errors +
96 stats->tx_window_errors +
97 stats->tx_heartbeat_errors,
98 stats->tx_compressed);
102 * Called from the PROCfs module. This now uses the new arbitrary sized
103 * /proc/net interface to create /proc/net/dev
105 static int dev_seq_show(struct seq_file *seq, void *v)
107 if (v == SEQ_START_TOKEN)
108 seq_puts(seq, "Inter-| Receive "
110 " face |bytes packets errs drop fifo frame "
111 "compressed multicast|bytes packets errs "
112 "drop fifo colls carrier compressed\n");
114 dev_seq_printf_stats(seq, v);
118 static u32 softnet_input_pkt_queue_len(struct softnet_data *sd)
120 return skb_queue_len_lockless(&sd->input_pkt_queue);
123 static u32 softnet_process_queue_len(struct softnet_data *sd)
125 return skb_queue_len_lockless(&sd->process_queue);
128 static struct softnet_data *softnet_get_online(loff_t *pos)
130 struct softnet_data *sd = NULL;
132 while (*pos < nr_cpu_ids)
133 if (cpu_online(*pos)) {
134 sd = &per_cpu(softnet_data, *pos);
141 static void *softnet_seq_start(struct seq_file *seq, loff_t *pos)
143 return softnet_get_online(pos);
146 static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
149 return softnet_get_online(pos);
152 static void softnet_seq_stop(struct seq_file *seq, void *v)
156 static int softnet_seq_show(struct seq_file *seq, void *v)
158 struct softnet_data *sd = v;
159 u32 input_qlen = softnet_input_pkt_queue_len(sd);
160 u32 process_qlen = softnet_process_queue_len(sd);
161 unsigned int flow_limit_count = 0;
163 #ifdef CONFIG_NET_FLOW_LIMIT
164 struct sd_flow_limit *fl;
167 fl = rcu_dereference(sd->flow_limit);
169 flow_limit_count = fl->count;
173 /* the index is the CPU id owing this sd. Since offline CPUs are not
174 * displayed, it would be othrwise not trivial for the user-space
175 * mapping the data a specific CPU
178 "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x "
180 sd->processed, sd->dropped, sd->time_squeeze, 0,
181 0, 0, 0, 0, /* was fastroute */
182 0, /* was cpu_collision */
183 sd->received_rps, flow_limit_count,
184 input_qlen + process_qlen, (int)seq->index,
185 input_qlen, process_qlen);
189 static const struct seq_operations dev_seq_ops = {
190 .start = dev_seq_start,
191 .next = dev_seq_next,
192 .stop = dev_seq_stop,
193 .show = dev_seq_show,
196 static const struct seq_operations softnet_seq_ops = {
197 .start = softnet_seq_start,
198 .next = softnet_seq_next,
199 .stop = softnet_seq_stop,
200 .show = softnet_seq_show,
203 static void *ptype_get_idx(struct seq_file *seq, loff_t pos)
205 struct list_head *ptype_list = NULL;
206 struct packet_type *pt = NULL;
207 struct net_device *dev;
211 for_each_netdev_rcu(seq_file_net(seq), dev) {
212 ptype_list = &dev->ptype_all;
213 list_for_each_entry_rcu(pt, ptype_list, list) {
220 list_for_each_entry_rcu(pt, &ptype_all, list) {
226 for (t = 0; t < PTYPE_HASH_SIZE; t++) {
227 list_for_each_entry_rcu(pt, &ptype_base[t], list) {
236 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
240 return *pos ? ptype_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
243 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
245 struct net_device *dev;
246 struct packet_type *pt;
247 struct list_head *nxt;
251 if (v == SEQ_START_TOKEN)
252 return ptype_get_idx(seq, 0);
257 if (nxt != &pt->dev->ptype_all)
261 for_each_netdev_continue_rcu(seq_file_net(seq), dev) {
262 if (!list_empty(&dev->ptype_all)) {
263 nxt = dev->ptype_all.next;
268 nxt = ptype_all.next;
272 if (pt->type == htons(ETH_P_ALL)) {
274 if (nxt != &ptype_all)
277 nxt = ptype_base[0].next;
279 hash = ntohs(pt->type) & PTYPE_HASH_MASK;
281 while (nxt == &ptype_base[hash]) {
282 if (++hash >= PTYPE_HASH_SIZE)
284 nxt = ptype_base[hash].next;
287 return list_entry(nxt, struct packet_type, list);
290 static void ptype_seq_stop(struct seq_file *seq, void *v)
296 static int ptype_seq_show(struct seq_file *seq, void *v)
298 struct packet_type *pt = v;
300 if (v == SEQ_START_TOKEN)
301 seq_puts(seq, "Type Device Function\n");
302 else if ((!pt->af_packet_net || net_eq(pt->af_packet_net, seq_file_net(seq))) &&
303 (!pt->dev || net_eq(dev_net(pt->dev), seq_file_net(seq)))) {
304 if (pt->type == htons(ETH_P_ALL))
305 seq_puts(seq, "ALL ");
307 seq_printf(seq, "%04x", ntohs(pt->type));
309 seq_printf(seq, " %-8s %ps\n",
310 pt->dev ? pt->dev->name : "", pt->func);
316 static const struct seq_operations ptype_seq_ops = {
317 .start = ptype_seq_start,
318 .next = ptype_seq_next,
319 .stop = ptype_seq_stop,
320 .show = ptype_seq_show,
323 static int __net_init dev_proc_net_init(struct net *net)
327 if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops,
328 sizeof(struct seq_net_private)))
330 if (!proc_create_seq("softnet_stat", 0444, net->proc_net,
333 if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
334 sizeof(struct seq_net_private)))
337 if (wext_proc_init(net))
343 remove_proc_entry("ptype", net->proc_net);
345 remove_proc_entry("softnet_stat", net->proc_net);
347 remove_proc_entry("dev", net->proc_net);
351 static void __net_exit dev_proc_net_exit(struct net *net)
355 remove_proc_entry("ptype", net->proc_net);
356 remove_proc_entry("softnet_stat", net->proc_net);
357 remove_proc_entry("dev", net->proc_net);
360 static struct pernet_operations __net_initdata dev_proc_ops = {
361 .init = dev_proc_net_init,
362 .exit = dev_proc_net_exit,
365 static int dev_mc_seq_show(struct seq_file *seq, void *v)
367 struct netdev_hw_addr *ha;
368 struct net_device *dev = v;
370 if (v == SEQ_START_TOKEN)
373 netif_addr_lock_bh(dev);
374 netdev_for_each_mc_addr(ha, dev) {
375 seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n",
376 dev->ifindex, dev->name,
377 ha->refcount, ha->global_use,
378 (int)dev->addr_len, ha->addr);
380 netif_addr_unlock_bh(dev);
384 static const struct seq_operations dev_mc_seq_ops = {
385 .start = dev_seq_start,
386 .next = dev_seq_next,
387 .stop = dev_seq_stop,
388 .show = dev_mc_seq_show,
391 static int __net_init dev_mc_net_init(struct net *net)
393 if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops,
394 sizeof(struct seq_net_private)))
399 static void __net_exit dev_mc_net_exit(struct net *net)
401 remove_proc_entry("dev_mcast", net->proc_net);
404 static struct pernet_operations __net_initdata dev_mc_net_ops = {
405 .init = dev_mc_net_init,
406 .exit = dev_mc_net_exit,
409 int __init dev_proc_init(void)
411 int ret = register_pernet_subsys(&dev_proc_ops);
413 return register_pernet_subsys(&dev_mc_net_ops);