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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
7#include "dev.h"
8
9#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
10
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))
14
15static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos)
16{
17 struct net *net = seq_file_net(seq);
18 struct net_device *dev;
19 struct hlist_head *h;
20 unsigned int count = 0, offset = get_offset(*pos);
21
22 h = &net->dev_index_head[get_bucket(*pos)];
23 hlist_for_each_entry_rcu(dev, h, index_hlist) {
24 if (++count == offset)
25 return dev;
26 }
27
28 return NULL;
29}
30
31static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos)
32{
33 struct net_device *dev;
34 unsigned int bucket;
35
36 do {
37 dev = dev_from_same_bucket(seq, pos);
38 if (dev)
39 return dev;
40
41 bucket = get_bucket(*pos) + 1;
42 *pos = set_bucket_offset(bucket, 1);
43 } while (bucket < NETDEV_HASHENTRIES);
44
45 return NULL;
46}
47
48/*
49 * This is invoked by the /proc filesystem handler to display a device
50 * in detail.
51 */
52static void *dev_seq_start(struct seq_file *seq, loff_t *pos)
53 __acquires(RCU)
54{
55 rcu_read_lock();
56 if (!*pos)
57 return SEQ_START_TOKEN;
58
59 if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
60 return NULL;
61
62 return dev_from_bucket(seq, pos);
63}
64
65static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
66{
67 ++*pos;
68 return dev_from_bucket(seq, pos);
69}
70
71static void dev_seq_stop(struct seq_file *seq, void *v)
72 __releases(RCU)
73{
74 rcu_read_unlock();
75}
76
77static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
78{
79 struct rtnl_link_stats64 temp;
80 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
81
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,
85 stats->rx_errors,
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);
99}
100
101/*
102 * Called from the PROCfs module. This now uses the new arbitrary sized
103 * /proc/net interface to create /proc/net/dev
104 */
105static int dev_seq_show(struct seq_file *seq, void *v)
106{
107 if (v == SEQ_START_TOKEN)
108 seq_puts(seq, "Inter-| Receive "
109 " | Transmit\n"
110 " face |bytes packets errs drop fifo frame "
111 "compressed multicast|bytes packets errs "
112 "drop fifo colls carrier compressed\n");
113 else
114 dev_seq_printf_stats(seq, v);
115 return 0;
116}
117
118static u32 softnet_input_pkt_queue_len(struct softnet_data *sd)
119{
120 return skb_queue_len_lockless(&sd->input_pkt_queue);
121}
122
123static u32 softnet_process_queue_len(struct softnet_data *sd)
124{
125 return skb_queue_len_lockless(&sd->process_queue);
126}
127
128static struct softnet_data *softnet_get_online(loff_t *pos)
129{
130 struct softnet_data *sd = NULL;
131
132 while (*pos < nr_cpu_ids)
133 if (cpu_online(*pos)) {
134 sd = &per_cpu(softnet_data, *pos);
135 break;
136 } else
137 ++*pos;
138 return sd;
139}
140
141static void *softnet_seq_start(struct seq_file *seq, loff_t *pos)
142{
143 return softnet_get_online(pos);
144}
145
146static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
147{
148 ++*pos;
149 return softnet_get_online(pos);
150}
151
152static void softnet_seq_stop(struct seq_file *seq, void *v)
153{
154}
155
156static int softnet_seq_show(struct seq_file *seq, void *v)
157{
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;
162
163#ifdef CONFIG_NET_FLOW_LIMIT
164 struct sd_flow_limit *fl;
165
166 rcu_read_lock();
167 fl = rcu_dereference(sd->flow_limit);
168 if (fl)
169 flow_limit_count = fl->count;
170 rcu_read_unlock();
171#endif
172
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
176 */
177 seq_printf(seq,
178 "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x "
179 "%08x %08x\n",
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);
186 return 0;
187}
188
189static 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,
194};
195
196static 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,
201};
202
203static void *ptype_get_idx(struct seq_file *seq, loff_t pos)
204{
205 struct list_head *ptype_list = NULL;
206 struct packet_type *pt = NULL;
207 struct net_device *dev;
208 loff_t i = 0;
209 int t;
210
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) {
214 if (i == pos)
215 return pt;
216 ++i;
217 }
218 }
219
220 list_for_each_entry_rcu(pt, &ptype_all, list) {
221 if (i == pos)
222 return pt;
223 ++i;
224 }
225
226 for (t = 0; t < PTYPE_HASH_SIZE; t++) {
227 list_for_each_entry_rcu(pt, &ptype_base[t], list) {
228 if (i == pos)
229 return pt;
230 ++i;
231 }
232 }
233 return NULL;
234}
235
236static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
237 __acquires(RCU)
238{
239 rcu_read_lock();
240 return *pos ? ptype_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
241}
242
243static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
244{
245 struct net_device *dev;
246 struct packet_type *pt;
247 struct list_head *nxt;
248 int hash;
249
250 ++*pos;
251 if (v == SEQ_START_TOKEN)
252 return ptype_get_idx(seq, 0);
253
254 pt = v;
255 nxt = pt->list.next;
256 if (pt->dev) {
257 if (nxt != &pt->dev->ptype_all)
258 goto found;
259
260 dev = pt->dev;
261 for_each_netdev_continue_rcu(seq_file_net(seq), dev) {
262 if (!list_empty(&dev->ptype_all)) {
263 nxt = dev->ptype_all.next;
264 goto found;
265 }
266 }
267
268 nxt = ptype_all.next;
269 goto ptype_all;
270 }
271
272 if (pt->type == htons(ETH_P_ALL)) {
273ptype_all:
274 if (nxt != &ptype_all)
275 goto found;
276 hash = 0;
277 nxt = ptype_base[0].next;
278 } else
279 hash = ntohs(pt->type) & PTYPE_HASH_MASK;
280
281 while (nxt == &ptype_base[hash]) {
282 if (++hash >= PTYPE_HASH_SIZE)
283 return NULL;
284 nxt = ptype_base[hash].next;
285 }
286found:
287 return list_entry(nxt, struct packet_type, list);
288}
289
290static void ptype_seq_stop(struct seq_file *seq, void *v)
291 __releases(RCU)
292{
293 rcu_read_unlock();
294}
295
296static int ptype_seq_show(struct seq_file *seq, void *v)
297{
298 struct packet_type *pt = v;
299
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 ");
306 else
307 seq_printf(seq, "%04x", ntohs(pt->type));
308
309 seq_printf(seq, " %-8s %ps\n",
310 pt->dev ? pt->dev->name : "", pt->func);
311 }
312
313 return 0;
314}
315
316static 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,
321};
322
323static int __net_init dev_proc_net_init(struct net *net)
324{
325 int rc = -ENOMEM;
326
327 if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops,
328 sizeof(struct seq_net_private)))
329 goto out;
330 if (!proc_create_seq("softnet_stat", 0444, net->proc_net,
331 &softnet_seq_ops))
332 goto out_dev;
333 if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
334 sizeof(struct seq_net_private)))
335 goto out_softnet;
336
337 if (wext_proc_init(net))
338 goto out_ptype;
339 rc = 0;
340out:
341 return rc;
342out_ptype:
343 remove_proc_entry("ptype", net->proc_net);
344out_softnet:
345 remove_proc_entry("softnet_stat", net->proc_net);
346out_dev:
347 remove_proc_entry("dev", net->proc_net);
348 goto out;
349}
350
351static void __net_exit dev_proc_net_exit(struct net *net)
352{
353 wext_proc_exit(net);
354
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);
358}
359
360static struct pernet_operations __net_initdata dev_proc_ops = {
361 .init = dev_proc_net_init,
362 .exit = dev_proc_net_exit,
363};
364
365static int dev_mc_seq_show(struct seq_file *seq, void *v)
366{
367 struct netdev_hw_addr *ha;
368 struct net_device *dev = v;
369
370 if (v == SEQ_START_TOKEN)
371 return 0;
372
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);
379 }
380 netif_addr_unlock_bh(dev);
381 return 0;
382}
383
384static 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,
389};
390
391static int __net_init dev_mc_net_init(struct net *net)
392{
393 if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops,
394 sizeof(struct seq_net_private)))
395 return -ENOMEM;
396 return 0;
397}
398
399static void __net_exit dev_mc_net_exit(struct net *net)
400{
401 remove_proc_entry("dev_mcast", net->proc_net);
402}
403
404static struct pernet_operations __net_initdata dev_mc_net_ops = {
405 .init = dev_mc_net_init,
406 .exit = dev_mc_net_exit,
407};
408
409int __init dev_proc_init(void)
410{
411 int ret = register_pernet_subsys(&dev_proc_ops);
412 if (!ret)
413 return register_pernet_subsys(&dev_mc_net_ops);
414 return ret;
415}
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_name_head[get_bucket(*pos)];
24 hlist_for_each_entry_rcu(dev, h, name_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 int dev_seq_open(struct inode *inode, struct file *file)
179{
180 return seq_open_net(inode, file, &dev_seq_ops,
181 sizeof(struct seq_net_private));
182}
183
184static const struct file_operations dev_seq_fops = {
185 .open = dev_seq_open,
186 .read = seq_read,
187 .llseek = seq_lseek,
188 .release = seq_release_net,
189};
190
191static const struct seq_operations softnet_seq_ops = {
192 .start = softnet_seq_start,
193 .next = softnet_seq_next,
194 .stop = softnet_seq_stop,
195 .show = softnet_seq_show,
196};
197
198static int softnet_seq_open(struct inode *inode, struct file *file)
199{
200 return seq_open(file, &softnet_seq_ops);
201}
202
203static const struct file_operations softnet_seq_fops = {
204 .open = softnet_seq_open,
205 .read = seq_read,
206 .llseek = seq_lseek,
207 .release = seq_release,
208};
209
210static void *ptype_get_idx(loff_t pos)
211{
212 struct packet_type *pt = NULL;
213 loff_t i = 0;
214 int t;
215
216 list_for_each_entry_rcu(pt, &ptype_all, list) {
217 if (i == pos)
218 return pt;
219 ++i;
220 }
221
222 for (t = 0; t < PTYPE_HASH_SIZE; t++) {
223 list_for_each_entry_rcu(pt, &ptype_base[t], list) {
224 if (i == pos)
225 return pt;
226 ++i;
227 }
228 }
229 return NULL;
230}
231
232static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
233 __acquires(RCU)
234{
235 rcu_read_lock();
236 return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN;
237}
238
239static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
240{
241 struct packet_type *pt;
242 struct list_head *nxt;
243 int hash;
244
245 ++*pos;
246 if (v == SEQ_START_TOKEN)
247 return ptype_get_idx(0);
248
249 pt = v;
250 nxt = pt->list.next;
251 if (pt->type == htons(ETH_P_ALL)) {
252 if (nxt != &ptype_all)
253 goto found;
254 hash = 0;
255 nxt = ptype_base[0].next;
256 } else
257 hash = ntohs(pt->type) & PTYPE_HASH_MASK;
258
259 while (nxt == &ptype_base[hash]) {
260 if (++hash >= PTYPE_HASH_SIZE)
261 return NULL;
262 nxt = ptype_base[hash].next;
263 }
264found:
265 return list_entry(nxt, struct packet_type, list);
266}
267
268static void ptype_seq_stop(struct seq_file *seq, void *v)
269 __releases(RCU)
270{
271 rcu_read_unlock();
272}
273
274static int ptype_seq_show(struct seq_file *seq, void *v)
275{
276 struct packet_type *pt = v;
277
278 if (v == SEQ_START_TOKEN)
279 seq_puts(seq, "Type Device Function\n");
280 else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) {
281 if (pt->type == htons(ETH_P_ALL))
282 seq_puts(seq, "ALL ");
283 else
284 seq_printf(seq, "%04x", ntohs(pt->type));
285
286 seq_printf(seq, " %-8s %pf\n",
287 pt->dev ? pt->dev->name : "", pt->func);
288 }
289
290 return 0;
291}
292
293static const struct seq_operations ptype_seq_ops = {
294 .start = ptype_seq_start,
295 .next = ptype_seq_next,
296 .stop = ptype_seq_stop,
297 .show = ptype_seq_show,
298};
299
300static int ptype_seq_open(struct inode *inode, struct file *file)
301{
302 return seq_open_net(inode, file, &ptype_seq_ops,
303 sizeof(struct seq_net_private));
304}
305
306static const struct file_operations ptype_seq_fops = {
307 .open = ptype_seq_open,
308 .read = seq_read,
309 .llseek = seq_lseek,
310 .release = seq_release_net,
311};
312
313
314static int __net_init dev_proc_net_init(struct net *net)
315{
316 int rc = -ENOMEM;
317
318 if (!proc_create("dev", 0444, net->proc_net, &dev_seq_fops))
319 goto out;
320 if (!proc_create("softnet_stat", 0444, net->proc_net,
321 &softnet_seq_fops))
322 goto out_dev;
323 if (!proc_create("ptype", 0444, net->proc_net, &ptype_seq_fops))
324 goto out_softnet;
325
326 if (wext_proc_init(net))
327 goto out_ptype;
328 rc = 0;
329out:
330 return rc;
331out_ptype:
332 remove_proc_entry("ptype", net->proc_net);
333out_softnet:
334 remove_proc_entry("softnet_stat", net->proc_net);
335out_dev:
336 remove_proc_entry("dev", net->proc_net);
337 goto out;
338}
339
340static void __net_exit dev_proc_net_exit(struct net *net)
341{
342 wext_proc_exit(net);
343
344 remove_proc_entry("ptype", net->proc_net);
345 remove_proc_entry("softnet_stat", net->proc_net);
346 remove_proc_entry("dev", net->proc_net);
347}
348
349static struct pernet_operations __net_initdata dev_proc_ops = {
350 .init = dev_proc_net_init,
351 .exit = dev_proc_net_exit,
352};
353
354static int dev_mc_seq_show(struct seq_file *seq, void *v)
355{
356 struct netdev_hw_addr *ha;
357 struct net_device *dev = v;
358
359 if (v == SEQ_START_TOKEN)
360 return 0;
361
362 netif_addr_lock_bh(dev);
363 netdev_for_each_mc_addr(ha, dev) {
364 seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n",
365 dev->ifindex, dev->name,
366 ha->refcount, ha->global_use,
367 (int)dev->addr_len, ha->addr);
368 }
369 netif_addr_unlock_bh(dev);
370 return 0;
371}
372
373static const struct seq_operations dev_mc_seq_ops = {
374 .start = dev_seq_start,
375 .next = dev_seq_next,
376 .stop = dev_seq_stop,
377 .show = dev_mc_seq_show,
378};
379
380static int dev_mc_seq_open(struct inode *inode, struct file *file)
381{
382 return seq_open_net(inode, file, &dev_mc_seq_ops,
383 sizeof(struct seq_net_private));
384}
385
386static const struct file_operations dev_mc_seq_fops = {
387 .open = dev_mc_seq_open,
388 .read = seq_read,
389 .llseek = seq_lseek,
390 .release = seq_release_net,
391};
392
393static int __net_init dev_mc_net_init(struct net *net)
394{
395 if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops))
396 return -ENOMEM;
397 return 0;
398}
399
400static void __net_exit dev_mc_net_exit(struct net *net)
401{
402 remove_proc_entry("dev_mcast", net->proc_net);
403}
404
405static struct pernet_operations __net_initdata dev_mc_net_ops = {
406 .init = dev_mc_net_init,
407 .exit = dev_mc_net_exit,
408};
409
410int __init dev_proc_init(void)
411{
412 int ret = register_pernet_subsys(&dev_proc_ops);
413 if (!ret)
414 return register_pernet_subsys(&dev_mc_net_ops);
415 return ret;
416}