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(loff_t pos)
187 struct packet_type *pt = NULL;
191 list_for_each_entry_rcu(pt, &ptype_all, list) {
197 for (t = 0; t < PTYPE_HASH_SIZE; t++) {
198 list_for_each_entry_rcu(pt, &ptype_base[t], list) {
207 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
211 return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN;
214 static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
216 struct packet_type *pt;
217 struct list_head *nxt;
221 if (v == SEQ_START_TOKEN)
222 return ptype_get_idx(0);
226 if (pt->type == htons(ETH_P_ALL)) {
227 if (nxt != &ptype_all)
230 nxt = ptype_base[0].next;
232 hash = ntohs(pt->type) & PTYPE_HASH_MASK;
234 while (nxt == &ptype_base[hash]) {
235 if (++hash >= PTYPE_HASH_SIZE)
237 nxt = ptype_base[hash].next;
240 return list_entry(nxt, struct packet_type, list);
243 static void ptype_seq_stop(struct seq_file *seq, void *v)
249 static int ptype_seq_show(struct seq_file *seq, void *v)
251 struct packet_type *pt = v;
253 if (v == SEQ_START_TOKEN)
254 seq_puts(seq, "Type Device Function\n");
255 else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) {
256 if (pt->type == htons(ETH_P_ALL))
257 seq_puts(seq, "ALL ");
259 seq_printf(seq, "%04x", ntohs(pt->type));
261 seq_printf(seq, " %-8s %pf\n",
262 pt->dev ? pt->dev->name : "", pt->func);
268 static const struct seq_operations ptype_seq_ops = {
269 .start = ptype_seq_start,
270 .next = ptype_seq_next,
271 .stop = ptype_seq_stop,
272 .show = ptype_seq_show,
275 static int __net_init dev_proc_net_init(struct net *net)
279 if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops,
280 sizeof(struct seq_net_private)))
282 if (!proc_create_seq("softnet_stat", 0444, net->proc_net,
285 if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
286 sizeof(struct seq_net_private)))
289 if (wext_proc_init(net))
295 remove_proc_entry("ptype", net->proc_net);
297 remove_proc_entry("softnet_stat", net->proc_net);
299 remove_proc_entry("dev", net->proc_net);
303 static void __net_exit dev_proc_net_exit(struct net *net)
307 remove_proc_entry("ptype", net->proc_net);
308 remove_proc_entry("softnet_stat", net->proc_net);
309 remove_proc_entry("dev", net->proc_net);
312 static struct pernet_operations __net_initdata dev_proc_ops = {
313 .init = dev_proc_net_init,
314 .exit = dev_proc_net_exit,
317 static int dev_mc_seq_show(struct seq_file *seq, void *v)
319 struct netdev_hw_addr *ha;
320 struct net_device *dev = v;
322 if (v == SEQ_START_TOKEN)
325 netif_addr_lock_bh(dev);
326 netdev_for_each_mc_addr(ha, dev) {
327 seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n",
328 dev->ifindex, dev->name,
329 ha->refcount, ha->global_use,
330 (int)dev->addr_len, ha->addr);
332 netif_addr_unlock_bh(dev);
336 static const struct seq_operations dev_mc_seq_ops = {
337 .start = dev_seq_start,
338 .next = dev_seq_next,
339 .stop = dev_seq_stop,
340 .show = dev_mc_seq_show,
343 static int __net_init dev_mc_net_init(struct net *net)
345 if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops,
346 sizeof(struct seq_net_private)))
351 static void __net_exit dev_mc_net_exit(struct net *net)
353 remove_proc_entry("dev_mcast", net->proc_net);
356 static struct pernet_operations __net_initdata dev_mc_net_ops = {
357 .init = dev_mc_net_init,
358 .exit = dev_mc_net_exit,
361 int __init dev_proc_init(void)
363 int ret = register_pernet_subsys(&dev_proc_ops);
365 return register_pernet_subsys(&dev_mc_net_ops);