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 | |
10 | static 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 | |
22 | static 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 | |
32 | static 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 | |
38 | static void dev_seq_stop(struct seq_file *seq, void *v) |
39 | __releases(RCU) |
40 | { |
41 | rcu_read_unlock(); |
42 | } |
43 | |
44 | static 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, storage: &temp); |
48 | |
49 | seq_printf(m: seq, fmt: "%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 | */ |
72 | static int dev_seq_show(struct seq_file *seq, void *v) |
73 | { |
74 | if (v == SEQ_START_TOKEN) |
75 | seq_puts(m: seq, s: "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, dev: v); |
82 | return 0; |
83 | } |
84 | |
85 | static u32 softnet_input_pkt_queue_len(struct softnet_data *sd) |
86 | { |
87 | return skb_queue_len_lockless(list_: &sd->input_pkt_queue); |
88 | } |
89 | |
90 | static u32 softnet_process_queue_len(struct softnet_data *sd) |
91 | { |
92 | return skb_queue_len_lockless(list_: &sd->process_queue); |
93 | } |
94 | |
95 | static 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(cpu: *pos)) { |
101 | sd = &per_cpu(softnet_data, *pos); |
102 | break; |
103 | } else |
104 | ++*pos; |
105 | return sd; |
106 | } |
107 | |
108 | static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) |
109 | { |
110 | return softnet_get_online(pos); |
111 | } |
112 | |
113 | static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
114 | { |
115 | ++*pos; |
116 | return softnet_get_online(pos); |
117 | } |
118 | |
119 | static void softnet_seq_stop(struct seq_file *seq, void *v) |
120 | { |
121 | } |
122 | |
123 | static 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(m: seq, |
145 | fmt: "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x " |
146 | "%08x %08x\n" , |
147 | sd->processed, sd->dropped, sd->time_squeeze, 0, |
148 | 0, 0, 0, 0, /* was fastroute */ |
149 | 0, /* was cpu_collision */ |
150 | sd->received_rps, flow_limit_count, |
151 | input_qlen + process_qlen, (int)seq->index, |
152 | input_qlen, process_qlen); |
153 | return 0; |
154 | } |
155 | |
156 | static const struct seq_operations dev_seq_ops = { |
157 | .start = dev_seq_start, |
158 | .next = dev_seq_next, |
159 | .stop = dev_seq_stop, |
160 | .show = dev_seq_show, |
161 | }; |
162 | |
163 | static const struct seq_operations softnet_seq_ops = { |
164 | .start = softnet_seq_start, |
165 | .next = softnet_seq_next, |
166 | .stop = softnet_seq_stop, |
167 | .show = softnet_seq_show, |
168 | }; |
169 | |
170 | static void *ptype_get_idx(struct seq_file *seq, loff_t pos) |
171 | { |
172 | struct list_head *ptype_list = NULL; |
173 | struct packet_type *pt = NULL; |
174 | struct net_device *dev; |
175 | loff_t i = 0; |
176 | int t; |
177 | |
178 | for_each_netdev_rcu(seq_file_net(seq), dev) { |
179 | ptype_list = &dev->ptype_all; |
180 | list_for_each_entry_rcu(pt, ptype_list, list) { |
181 | if (i == pos) |
182 | return pt; |
183 | ++i; |
184 | } |
185 | } |
186 | |
187 | list_for_each_entry_rcu(pt, &net_hotdata.ptype_all, list) { |
188 | if (i == pos) |
189 | return pt; |
190 | ++i; |
191 | } |
192 | |
193 | for (t = 0; t < PTYPE_HASH_SIZE; t++) { |
194 | list_for_each_entry_rcu(pt, &ptype_base[t], list) { |
195 | if (i == pos) |
196 | return pt; |
197 | ++i; |
198 | } |
199 | } |
200 | return NULL; |
201 | } |
202 | |
203 | static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) |
204 | __acquires(RCU) |
205 | { |
206 | rcu_read_lock(); |
207 | return *pos ? ptype_get_idx(seq, pos: *pos - 1) : SEQ_START_TOKEN; |
208 | } |
209 | |
210 | static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
211 | { |
212 | struct net_device *dev; |
213 | struct packet_type *pt; |
214 | struct list_head *nxt; |
215 | int hash; |
216 | |
217 | ++*pos; |
218 | if (v == SEQ_START_TOKEN) |
219 | return ptype_get_idx(seq, pos: 0); |
220 | |
221 | pt = v; |
222 | nxt = pt->list.next; |
223 | if (pt->dev) { |
224 | if (nxt != &pt->dev->ptype_all) |
225 | goto found; |
226 | |
227 | dev = pt->dev; |
228 | for_each_netdev_continue_rcu(seq_file_net(seq), dev) { |
229 | if (!list_empty(head: &dev->ptype_all)) { |
230 | nxt = dev->ptype_all.next; |
231 | goto found; |
232 | } |
233 | } |
234 | |
235 | nxt = net_hotdata.ptype_all.next; |
236 | goto ptype_all; |
237 | } |
238 | |
239 | if (pt->type == htons(ETH_P_ALL)) { |
240 | ptype_all: |
241 | if (nxt != &net_hotdata.ptype_all) |
242 | goto found; |
243 | hash = 0; |
244 | nxt = ptype_base[0].next; |
245 | } else |
246 | hash = ntohs(pt->type) & PTYPE_HASH_MASK; |
247 | |
248 | while (nxt == &ptype_base[hash]) { |
249 | if (++hash >= PTYPE_HASH_SIZE) |
250 | return NULL; |
251 | nxt = ptype_base[hash].next; |
252 | } |
253 | found: |
254 | return list_entry(nxt, struct packet_type, list); |
255 | } |
256 | |
257 | static void ptype_seq_stop(struct seq_file *seq, void *v) |
258 | __releases(RCU) |
259 | { |
260 | rcu_read_unlock(); |
261 | } |
262 | |
263 | static int ptype_seq_show(struct seq_file *seq, void *v) |
264 | { |
265 | struct packet_type *pt = v; |
266 | |
267 | if (v == SEQ_START_TOKEN) |
268 | seq_puts(m: seq, s: "Type Device Function\n" ); |
269 | else if ((!pt->af_packet_net || net_eq(net1: pt->af_packet_net, net2: seq_file_net(seq))) && |
270 | (!pt->dev || net_eq(net1: dev_net(dev: pt->dev), net2: seq_file_net(seq)))) { |
271 | if (pt->type == htons(ETH_P_ALL)) |
272 | seq_puts(m: seq, s: "ALL " ); |
273 | else |
274 | seq_printf(m: seq, fmt: "%04x" , ntohs(pt->type)); |
275 | |
276 | seq_printf(m: seq, fmt: " %-8s %ps\n" , |
277 | pt->dev ? pt->dev->name : "" , pt->func); |
278 | } |
279 | |
280 | return 0; |
281 | } |
282 | |
283 | static const struct seq_operations ptype_seq_ops = { |
284 | .start = ptype_seq_start, |
285 | .next = ptype_seq_next, |
286 | .stop = ptype_seq_stop, |
287 | .show = ptype_seq_show, |
288 | }; |
289 | |
290 | static int __net_init dev_proc_net_init(struct net *net) |
291 | { |
292 | int rc = -ENOMEM; |
293 | |
294 | if (!proc_create_net("dev" , 0444, net->proc_net, &dev_seq_ops, |
295 | sizeof(struct seq_net_private))) |
296 | goto out; |
297 | if (!proc_create_seq("softnet_stat" , 0444, net->proc_net, |
298 | &softnet_seq_ops)) |
299 | goto out_dev; |
300 | if (!proc_create_net("ptype" , 0444, net->proc_net, &ptype_seq_ops, |
301 | sizeof(struct seq_net_private))) |
302 | goto out_softnet; |
303 | |
304 | if (wext_proc_init(net)) |
305 | goto out_ptype; |
306 | rc = 0; |
307 | out: |
308 | return rc; |
309 | out_ptype: |
310 | remove_proc_entry("ptype" , net->proc_net); |
311 | out_softnet: |
312 | remove_proc_entry("softnet_stat" , net->proc_net); |
313 | out_dev: |
314 | remove_proc_entry("dev" , net->proc_net); |
315 | goto out; |
316 | } |
317 | |
318 | static void __net_exit dev_proc_net_exit(struct net *net) |
319 | { |
320 | wext_proc_exit(net); |
321 | |
322 | remove_proc_entry("ptype" , net->proc_net); |
323 | remove_proc_entry("softnet_stat" , net->proc_net); |
324 | remove_proc_entry("dev" , net->proc_net); |
325 | } |
326 | |
327 | static struct pernet_operations __net_initdata dev_proc_ops = { |
328 | .init = dev_proc_net_init, |
329 | .exit = dev_proc_net_exit, |
330 | }; |
331 | |
332 | static int dev_mc_seq_show(struct seq_file *seq, void *v) |
333 | { |
334 | struct netdev_hw_addr *ha; |
335 | struct net_device *dev = v; |
336 | |
337 | if (v == SEQ_START_TOKEN) |
338 | return 0; |
339 | |
340 | netif_addr_lock_bh(dev); |
341 | netdev_for_each_mc_addr(ha, dev) { |
342 | seq_printf(m: seq, fmt: "%-4d %-15s %-5d %-5d %*phN\n" , |
343 | dev->ifindex, dev->name, |
344 | ha->refcount, ha->global_use, |
345 | (int)dev->addr_len, ha->addr); |
346 | } |
347 | netif_addr_unlock_bh(dev); |
348 | return 0; |
349 | } |
350 | |
351 | static const struct seq_operations dev_mc_seq_ops = { |
352 | .start = dev_seq_start, |
353 | .next = dev_seq_next, |
354 | .stop = dev_seq_stop, |
355 | .show = dev_mc_seq_show, |
356 | }; |
357 | |
358 | static int __net_init dev_mc_net_init(struct net *net) |
359 | { |
360 | if (!proc_create_net("dev_mcast" , 0, net->proc_net, &dev_mc_seq_ops, |
361 | sizeof(struct seq_net_private))) |
362 | return -ENOMEM; |
363 | return 0; |
364 | } |
365 | |
366 | static void __net_exit dev_mc_net_exit(struct net *net) |
367 | { |
368 | remove_proc_entry("dev_mcast" , net->proc_net); |
369 | } |
370 | |
371 | static struct pernet_operations __net_initdata dev_mc_net_ops = { |
372 | .init = dev_mc_net_init, |
373 | .exit = dev_mc_net_exit, |
374 | }; |
375 | |
376 | int __init dev_proc_init(void) |
377 | { |
378 | int ret = register_pernet_subsys(&dev_proc_ops); |
379 | if (!ret) |
380 | return register_pernet_subsys(&dev_mc_net_ops); |
381 | return ret; |
382 | } |
383 | |