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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
900ff8c6 CW |
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 | ||
13 | extern struct list_head ptype_all __read_mostly; | |
14 | extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly; | |
15 | ||
16 | static 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; | |
900ff8c6 CW |
20 | struct hlist_head *h; |
21 | unsigned int count = 0, offset = get_offset(*pos); | |
22 | ||
6958c97a JP |
23 | h = &net->dev_index_head[get_bucket(*pos)]; |
24 | hlist_for_each_entry_rcu(dev, h, index_hlist) { | |
900ff8c6 CW |
25 | if (++count == offset) |
26 | return dev; | |
27 | } | |
28 | ||
29 | return NULL; | |
30 | } | |
31 | ||
32 | static 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 | */ | |
53 | static 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 | ||
66 | static 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 | ||
72 | static void dev_seq_stop(struct seq_file *seq, void *v) | |
73 | __releases(RCU) | |
74 | { | |
75 | rcu_read_unlock(); | |
76 | } | |
77 | ||
78 | static 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 | */ | |
106 | static 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 | ||
7d58e655 PA |
119 | static u32 softnet_backlog_len(struct softnet_data *sd) |
120 | { | |
121 | return skb_queue_len_lockless(&sd->input_pkt_queue) + | |
122 | skb_queue_len_lockless(&sd->process_queue); | |
123 | } | |
124 | ||
900ff8c6 CW |
125 | static struct softnet_data *softnet_get_online(loff_t *pos) |
126 | { | |
127 | struct softnet_data *sd = NULL; | |
128 | ||
129 | while (*pos < nr_cpu_ids) | |
130 | if (cpu_online(*pos)) { | |
131 | sd = &per_cpu(softnet_data, *pos); | |
132 | break; | |
133 | } else | |
134 | ++*pos; | |
135 | return sd; | |
136 | } | |
137 | ||
138 | static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) | |
139 | { | |
140 | return softnet_get_online(pos); | |
141 | } | |
142 | ||
143 | static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
144 | { | |
145 | ++*pos; | |
146 | return softnet_get_online(pos); | |
147 | } | |
148 | ||
149 | static void softnet_seq_stop(struct seq_file *seq, void *v) | |
150 | { | |
151 | } | |
152 | ||
153 | static int softnet_seq_show(struct seq_file *seq, void *v) | |
154 | { | |
155 | struct softnet_data *sd = v; | |
99bbc707 | 156 | unsigned int flow_limit_count = 0; |
900ff8c6 | 157 | |
99bbc707 WB |
158 | #ifdef CONFIG_NET_FLOW_LIMIT |
159 | struct sd_flow_limit *fl; | |
160 | ||
161 | rcu_read_lock(); | |
162 | fl = rcu_dereference(sd->flow_limit); | |
163 | if (fl) | |
164 | flow_limit_count = fl->count; | |
165 | rcu_read_unlock(); | |
166 | #endif | |
167 | ||
7d58e655 PA |
168 | /* the index is the CPU id owing this sd. Since offline CPUs are not |
169 | * displayed, it would be othrwise not trivial for the user-space | |
170 | * mapping the data a specific CPU | |
171 | */ | |
99bbc707 | 172 | seq_printf(seq, |
7d58e655 | 173 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
900ff8c6 CW |
174 | sd->processed, sd->dropped, sd->time_squeeze, 0, |
175 | 0, 0, 0, 0, /* was fastroute */ | |
f0cdf76c | 176 | 0, /* was cpu_collision */ |
7d58e655 PA |
177 | sd->received_rps, flow_limit_count, |
178 | softnet_backlog_len(sd), (int)seq->index); | |
900ff8c6 CW |
179 | return 0; |
180 | } | |
181 | ||
182 | static const struct seq_operations dev_seq_ops = { | |
183 | .start = dev_seq_start, | |
184 | .next = dev_seq_next, | |
185 | .stop = dev_seq_stop, | |
186 | .show = dev_seq_show, | |
187 | }; | |
188 | ||
900ff8c6 CW |
189 | static const struct seq_operations softnet_seq_ops = { |
190 | .start = softnet_seq_start, | |
191 | .next = softnet_seq_next, | |
192 | .stop = softnet_seq_stop, | |
193 | .show = softnet_seq_show, | |
194 | }; | |
195 | ||
900ff8c6 CW |
196 | static void *ptype_get_idx(loff_t pos) |
197 | { | |
198 | struct packet_type *pt = NULL; | |
199 | loff_t i = 0; | |
200 | int t; | |
201 | ||
202 | list_for_each_entry_rcu(pt, &ptype_all, list) { | |
203 | if (i == pos) | |
204 | return pt; | |
205 | ++i; | |
206 | } | |
207 | ||
208 | for (t = 0; t < PTYPE_HASH_SIZE; t++) { | |
209 | list_for_each_entry_rcu(pt, &ptype_base[t], list) { | |
210 | if (i == pos) | |
211 | return pt; | |
212 | ++i; | |
213 | } | |
214 | } | |
215 | return NULL; | |
216 | } | |
217 | ||
218 | static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) | |
219 | __acquires(RCU) | |
220 | { | |
221 | rcu_read_lock(); | |
222 | return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN; | |
223 | } | |
224 | ||
225 | static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
226 | { | |
227 | struct packet_type *pt; | |
228 | struct list_head *nxt; | |
229 | int hash; | |
230 | ||
231 | ++*pos; | |
232 | if (v == SEQ_START_TOKEN) | |
233 | return ptype_get_idx(0); | |
234 | ||
235 | pt = v; | |
236 | nxt = pt->list.next; | |
237 | if (pt->type == htons(ETH_P_ALL)) { | |
238 | if (nxt != &ptype_all) | |
239 | goto found; | |
240 | hash = 0; | |
241 | nxt = ptype_base[0].next; | |
242 | } else | |
243 | hash = ntohs(pt->type) & PTYPE_HASH_MASK; | |
244 | ||
245 | while (nxt == &ptype_base[hash]) { | |
246 | if (++hash >= PTYPE_HASH_SIZE) | |
247 | return NULL; | |
248 | nxt = ptype_base[hash].next; | |
249 | } | |
250 | found: | |
251 | return list_entry(nxt, struct packet_type, list); | |
252 | } | |
253 | ||
254 | static void ptype_seq_stop(struct seq_file *seq, void *v) | |
255 | __releases(RCU) | |
256 | { | |
257 | rcu_read_unlock(); | |
258 | } | |
259 | ||
260 | static int ptype_seq_show(struct seq_file *seq, void *v) | |
261 | { | |
262 | struct packet_type *pt = v; | |
263 | ||
264 | if (v == SEQ_START_TOKEN) | |
265 | seq_puts(seq, "Type Device Function\n"); | |
266 | else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) { | |
267 | if (pt->type == htons(ETH_P_ALL)) | |
268 | seq_puts(seq, "ALL "); | |
269 | else | |
270 | seq_printf(seq, "%04x", ntohs(pt->type)); | |
271 | ||
d75f773c | 272 | seq_printf(seq, " %-8s %ps\n", |
900ff8c6 CW |
273 | pt->dev ? pt->dev->name : "", pt->func); |
274 | } | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static const struct seq_operations ptype_seq_ops = { | |
280 | .start = ptype_seq_start, | |
281 | .next = ptype_seq_next, | |
282 | .stop = ptype_seq_stop, | |
283 | .show = ptype_seq_show, | |
284 | }; | |
285 | ||
900ff8c6 CW |
286 | static int __net_init dev_proc_net_init(struct net *net) |
287 | { | |
288 | int rc = -ENOMEM; | |
289 | ||
c3506372 CH |
290 | if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops, |
291 | sizeof(struct seq_net_private))) | |
900ff8c6 | 292 | goto out; |
fddda2b7 CH |
293 | if (!proc_create_seq("softnet_stat", 0444, net->proc_net, |
294 | &softnet_seq_ops)) | |
900ff8c6 | 295 | goto out_dev; |
c3506372 CH |
296 | if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops, |
297 | sizeof(struct seq_net_private))) | |
900ff8c6 CW |
298 | goto out_softnet; |
299 | ||
300 | if (wext_proc_init(net)) | |
301 | goto out_ptype; | |
302 | rc = 0; | |
303 | out: | |
304 | return rc; | |
305 | out_ptype: | |
306 | remove_proc_entry("ptype", net->proc_net); | |
307 | out_softnet: | |
308 | remove_proc_entry("softnet_stat", net->proc_net); | |
309 | out_dev: | |
310 | remove_proc_entry("dev", net->proc_net); | |
311 | goto out; | |
312 | } | |
313 | ||
314 | static void __net_exit dev_proc_net_exit(struct net *net) | |
315 | { | |
316 | wext_proc_exit(net); | |
317 | ||
318 | remove_proc_entry("ptype", net->proc_net); | |
319 | remove_proc_entry("softnet_stat", net->proc_net); | |
320 | remove_proc_entry("dev", net->proc_net); | |
321 | } | |
322 | ||
323 | static struct pernet_operations __net_initdata dev_proc_ops = { | |
324 | .init = dev_proc_net_init, | |
325 | .exit = dev_proc_net_exit, | |
326 | }; | |
327 | ||
900ff8c6 CW |
328 | static int dev_mc_seq_show(struct seq_file *seq, void *v) |
329 | { | |
330 | struct netdev_hw_addr *ha; | |
331 | struct net_device *dev = v; | |
332 | ||
333 | if (v == SEQ_START_TOKEN) | |
334 | return 0; | |
335 | ||
336 | netif_addr_lock_bh(dev); | |
337 | netdev_for_each_mc_addr(ha, dev) { | |
fbd0ac60 JP |
338 | seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n", |
339 | dev->ifindex, dev->name, | |
340 | ha->refcount, ha->global_use, | |
341 | (int)dev->addr_len, ha->addr); | |
900ff8c6 CW |
342 | } |
343 | netif_addr_unlock_bh(dev); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | static const struct seq_operations dev_mc_seq_ops = { | |
348 | .start = dev_seq_start, | |
349 | .next = dev_seq_next, | |
350 | .stop = dev_seq_stop, | |
351 | .show = dev_mc_seq_show, | |
352 | }; | |
353 | ||
900ff8c6 CW |
354 | static int __net_init dev_mc_net_init(struct net *net) |
355 | { | |
c3506372 CH |
356 | if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops, |
357 | sizeof(struct seq_net_private))) | |
900ff8c6 CW |
358 | return -ENOMEM; |
359 | return 0; | |
360 | } | |
361 | ||
362 | static void __net_exit dev_mc_net_exit(struct net *net) | |
363 | { | |
364 | remove_proc_entry("dev_mcast", net->proc_net); | |
365 | } | |
366 | ||
367 | static struct pernet_operations __net_initdata dev_mc_net_ops = { | |
368 | .init = dev_mc_net_init, | |
369 | .exit = dev_mc_net_exit, | |
370 | }; | |
371 | ||
cd061574 | 372 | int __init dev_proc_init(void) |
900ff8c6 | 373 | { |
cd061574 CW |
374 | int ret = register_pernet_subsys(&dev_proc_ops); |
375 | if (!ret) | |
376 | return register_pernet_subsys(&dev_mc_net_ops); | |
377 | return ret; | |
900ff8c6 | 378 | } |