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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
10static 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
22static 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
32static 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
38static void dev_seq_stop(struct seq_file *seq, void *v)
39 __releases(RCU)
40{
41 rcu_read_unlock();
42}
43
44static 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 */
72static 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
85static u32 softnet_input_pkt_queue_len(struct softnet_data *sd)
86{
87 return skb_queue_len_lockless(&sd->input_pkt_queue);
88}
89
90static u32 softnet_process_queue_len(struct softnet_data *sd)
91{
92 return skb_queue_len_lockless(&sd->process_queue);
93}
94
95static 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
108static void *softnet_seq_start(struct seq_file *seq, loff_t *pos)
109{
110 return softnet_get_online(pos);
111}
112
113static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
114{
115 ++*pos;
116 return softnet_get_online(pos);
117}
118
119static void softnet_seq_stop(struct seq_file *seq, void *v)
120{
121}
122
123static 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
157static 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
164static 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
171static 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
204static 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
211static 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)) {
241ptype_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 }
254found:
255 return list_entry(nxt, struct packet_type, list);
256}
257
258static void ptype_seq_stop(struct seq_file *seq, void *v)
259 __releases(RCU)
260{
261 rcu_read_unlock();
262}
263
264static 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
284static 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
291static 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;
308out:
309 return rc;
310out_ptype:
311 remove_proc_entry("ptype", net->proc_net);
312out_softnet:
313 remove_proc_entry("softnet_stat", net->proc_net);
314out_dev:
315 remove_proc_entry("dev", net->proc_net);
316 goto out;
317}
318
319static 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
328static struct pernet_operations __net_initdata dev_proc_ops = {
329 .init = dev_proc_net_init,
330 .exit = dev_proc_net_exit,
331};
332
333static 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
352static 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
359static 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
367static void __net_exit dev_mc_net_exit(struct net *net)
368{
369 remove_proc_entry("dev_mcast", net->proc_net);
370}
371
372static struct pernet_operations __net_initdata dev_mc_net_ops = {
373 .init = dev_mc_net_init,
374 .exit = dev_mc_net_exit,
375};
376
377int __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}
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
7#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
8
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))
12
13extern struct list_head ptype_all __read_mostly;
14extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
15
16static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos)
17{
18 struct net *net = seq_file_net(seq);
19 struct net_device *dev;
20 struct hlist_head *h;
21 unsigned int count = 0, offset = get_offset(*pos);
22
23 h = &net->dev_index_head[get_bucket(*pos)];
24 hlist_for_each_entry_rcu(dev, h, index_hlist) {
25 if (++count == offset)
26 return dev;
27 }
28
29 return NULL;
30}
31
32static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos)
33{
34 struct net_device *dev;
35 unsigned int bucket;
36
37 do {
38 dev = dev_from_same_bucket(seq, pos);
39 if (dev)
40 return dev;
41
42 bucket = get_bucket(*pos) + 1;
43 *pos = set_bucket_offset(bucket, 1);
44 } while (bucket < NETDEV_HASHENTRIES);
45
46 return NULL;
47}
48
49/*
50 * This is invoked by the /proc filesystem handler to display a device
51 * in detail.
52 */
53static void *dev_seq_start(struct seq_file *seq, loff_t *pos)
54 __acquires(RCU)
55{
56 rcu_read_lock();
57 if (!*pos)
58 return SEQ_START_TOKEN;
59
60 if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
61 return NULL;
62
63 return dev_from_bucket(seq, pos);
64}
65
66static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
67{
68 ++*pos;
69 return dev_from_bucket(seq, pos);
70}
71
72static void dev_seq_stop(struct seq_file *seq, void *v)
73 __releases(RCU)
74{
75 rcu_read_unlock();
76}
77
78static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
79{
80 struct rtnl_link_stats64 temp;
81 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
82
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,
86 stats->rx_errors,
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);
100}
101
102/*
103 * Called from the PROCfs module. This now uses the new arbitrary sized
104 * /proc/net interface to create /proc/net/dev
105 */
106static int dev_seq_show(struct seq_file *seq, void *v)
107{
108 if (v == SEQ_START_TOKEN)
109 seq_puts(seq, "Inter-| Receive "
110 " | Transmit\n"
111 " face |bytes packets errs drop fifo frame "
112 "compressed multicast|bytes packets errs "
113 "drop fifo colls carrier compressed\n");
114 else
115 dev_seq_printf_stats(seq, v);
116 return 0;
117}
118
119static struct softnet_data *softnet_get_online(loff_t *pos)
120{
121 struct softnet_data *sd = NULL;
122
123 while (*pos < nr_cpu_ids)
124 if (cpu_online(*pos)) {
125 sd = &per_cpu(softnet_data, *pos);
126 break;
127 } else
128 ++*pos;
129 return sd;
130}
131
132static void *softnet_seq_start(struct seq_file *seq, loff_t *pos)
133{
134 return softnet_get_online(pos);
135}
136
137static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
138{
139 ++*pos;
140 return softnet_get_online(pos);
141}
142
143static void softnet_seq_stop(struct seq_file *seq, void *v)
144{
145}
146
147static int softnet_seq_show(struct seq_file *seq, void *v)
148{
149 struct softnet_data *sd = v;
150 unsigned int flow_limit_count = 0;
151
152#ifdef CONFIG_NET_FLOW_LIMIT
153 struct sd_flow_limit *fl;
154
155 rcu_read_lock();
156 fl = rcu_dereference(sd->flow_limit);
157 if (fl)
158 flow_limit_count = fl->count;
159 rcu_read_unlock();
160#endif
161
162 seq_printf(seq,
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);
168 return 0;
169}
170
171static 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,
176};
177
178static 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,
183};
184
185static void *ptype_get_idx(loff_t pos)
186{
187 struct packet_type *pt = NULL;
188 loff_t i = 0;
189 int t;
190
191 list_for_each_entry_rcu(pt, &ptype_all, list) {
192 if (i == pos)
193 return pt;
194 ++i;
195 }
196
197 for (t = 0; t < PTYPE_HASH_SIZE; t++) {
198 list_for_each_entry_rcu(pt, &ptype_base[t], list) {
199 if (i == pos)
200 return pt;
201 ++i;
202 }
203 }
204 return NULL;
205}
206
207static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
208 __acquires(RCU)
209{
210 rcu_read_lock();
211 return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN;
212}
213
214static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
215{
216 struct packet_type *pt;
217 struct list_head *nxt;
218 int hash;
219
220 ++*pos;
221 if (v == SEQ_START_TOKEN)
222 return ptype_get_idx(0);
223
224 pt = v;
225 nxt = pt->list.next;
226 if (pt->type == htons(ETH_P_ALL)) {
227 if (nxt != &ptype_all)
228 goto found;
229 hash = 0;
230 nxt = ptype_base[0].next;
231 } else
232 hash = ntohs(pt->type) & PTYPE_HASH_MASK;
233
234 while (nxt == &ptype_base[hash]) {
235 if (++hash >= PTYPE_HASH_SIZE)
236 return NULL;
237 nxt = ptype_base[hash].next;
238 }
239found:
240 return list_entry(nxt, struct packet_type, list);
241}
242
243static void ptype_seq_stop(struct seq_file *seq, void *v)
244 __releases(RCU)
245{
246 rcu_read_unlock();
247}
248
249static int ptype_seq_show(struct seq_file *seq, void *v)
250{
251 struct packet_type *pt = v;
252
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 ");
258 else
259 seq_printf(seq, "%04x", ntohs(pt->type));
260
261 seq_printf(seq, " %-8s %ps\n",
262 pt->dev ? pt->dev->name : "", pt->func);
263 }
264
265 return 0;
266}
267
268static 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,
273};
274
275static int __net_init dev_proc_net_init(struct net *net)
276{
277 int rc = -ENOMEM;
278
279 if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops,
280 sizeof(struct seq_net_private)))
281 goto out;
282 if (!proc_create_seq("softnet_stat", 0444, net->proc_net,
283 &softnet_seq_ops))
284 goto out_dev;
285 if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
286 sizeof(struct seq_net_private)))
287 goto out_softnet;
288
289 if (wext_proc_init(net))
290 goto out_ptype;
291 rc = 0;
292out:
293 return rc;
294out_ptype:
295 remove_proc_entry("ptype", net->proc_net);
296out_softnet:
297 remove_proc_entry("softnet_stat", net->proc_net);
298out_dev:
299 remove_proc_entry("dev", net->proc_net);
300 goto out;
301}
302
303static void __net_exit dev_proc_net_exit(struct net *net)
304{
305 wext_proc_exit(net);
306
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);
310}
311
312static struct pernet_operations __net_initdata dev_proc_ops = {
313 .init = dev_proc_net_init,
314 .exit = dev_proc_net_exit,
315};
316
317static int dev_mc_seq_show(struct seq_file *seq, void *v)
318{
319 struct netdev_hw_addr *ha;
320 struct net_device *dev = v;
321
322 if (v == SEQ_START_TOKEN)
323 return 0;
324
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);
331 }
332 netif_addr_unlock_bh(dev);
333 return 0;
334}
335
336static 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,
341};
342
343static int __net_init dev_mc_net_init(struct net *net)
344{
345 if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops,
346 sizeof(struct seq_net_private)))
347 return -ENOMEM;
348 return 0;
349}
350
351static void __net_exit dev_mc_net_exit(struct net *net)
352{
353 remove_proc_entry("dev_mcast", net->proc_net);
354}
355
356static struct pernet_operations __net_initdata dev_mc_net_ops = {
357 .init = dev_mc_net_init,
358 .exit = dev_mc_net_exit,
359};
360
361int __init dev_proc_init(void)
362{
363 int ret = register_pernet_subsys(&dev_proc_ops);
364 if (!ret)
365 return register_pernet_subsys(&dev_mc_net_ops);
366 return ret;
367}