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43#include <linux/module.h>
44#include <linux/proc_fs.h>
45#include <linux/list.h>
46#include <linux/rcupdate.h>
47#include <linux/if_arp.h>
48#include <linux/can/can-ml.h>
49#include <linux/can/core.h>
50
51#include "af_can.h"
52
53
54
55
56
57#define CAN_PROC_STATS "stats"
58#define CAN_PROC_RESET_STATS "reset_stats"
59#define CAN_PROC_RCVLIST_ALL "rcvlist_all"
60#define CAN_PROC_RCVLIST_FIL "rcvlist_fil"
61#define CAN_PROC_RCVLIST_INV "rcvlist_inv"
62#define CAN_PROC_RCVLIST_SFF "rcvlist_sff"
63#define CAN_PROC_RCVLIST_EFF "rcvlist_eff"
64#define CAN_PROC_RCVLIST_ERR "rcvlist_err"
65
66static int user_reset;
67
68static const char rx_list_name[][8] = {
69 [RX_ERR] = "rx_err",
70 [RX_ALL] = "rx_all",
71 [RX_FIL] = "rx_fil",
72 [RX_INV] = "rx_inv",
73};
74
75
76
77
78
79static void can_init_stats(struct net *net)
80{
81 struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
82 struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
83
84
85
86
87
88 memset(pkg_stats, 0, sizeof(struct can_pkg_stats));
89 pkg_stats->jiffies_init = jiffies;
90
91 rcv_lists_stats->stats_reset++;
92
93 if (user_reset) {
94 user_reset = 0;
95 rcv_lists_stats->user_reset++;
96 }
97}
98
99static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
100 unsigned long count)
101{
102 unsigned long rate;
103
104 if (oldjif == newjif)
105 return 0;
106
107
108 if (count > (ULONG_MAX / HZ)) {
109 printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n",
110 count);
111 return 99999999;
112 }
113
114 rate = (count * HZ) / (newjif - oldjif);
115
116 return rate;
117}
118
119void can_stat_update(struct timer_list *t)
120{
121 struct net *net = from_timer(net, t, can.stattimer);
122 struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
123 unsigned long j = jiffies;
124
125
126 if (user_reset)
127 can_init_stats(net);
128
129
130 if (j < pkg_stats->jiffies_init)
131 can_init_stats(net);
132
133
134 if (pkg_stats->rx_frames > (ULONG_MAX / HZ))
135 can_init_stats(net);
136
137
138 if (pkg_stats->tx_frames > (ULONG_MAX / HZ))
139 can_init_stats(net);
140
141
142 if (pkg_stats->matches > (ULONG_MAX / 100))
143 can_init_stats(net);
144
145
146 if (pkg_stats->rx_frames)
147 pkg_stats->total_rx_match_ratio = (pkg_stats->matches * 100) /
148 pkg_stats->rx_frames;
149
150 pkg_stats->total_tx_rate = calc_rate(pkg_stats->jiffies_init, j,
151 pkg_stats->tx_frames);
152 pkg_stats->total_rx_rate = calc_rate(pkg_stats->jiffies_init, j,
153 pkg_stats->rx_frames);
154
155
156 if (pkg_stats->rx_frames_delta)
157 pkg_stats->current_rx_match_ratio =
158 (pkg_stats->matches_delta * 100) /
159 pkg_stats->rx_frames_delta;
160
161 pkg_stats->current_tx_rate = calc_rate(0, HZ, pkg_stats->tx_frames_delta);
162 pkg_stats->current_rx_rate = calc_rate(0, HZ, pkg_stats->rx_frames_delta);
163
164
165 if (pkg_stats->max_tx_rate < pkg_stats->current_tx_rate)
166 pkg_stats->max_tx_rate = pkg_stats->current_tx_rate;
167
168 if (pkg_stats->max_rx_rate < pkg_stats->current_rx_rate)
169 pkg_stats->max_rx_rate = pkg_stats->current_rx_rate;
170
171 if (pkg_stats->max_rx_match_ratio < pkg_stats->current_rx_match_ratio)
172 pkg_stats->max_rx_match_ratio = pkg_stats->current_rx_match_ratio;
173
174
175 pkg_stats->tx_frames_delta = 0;
176 pkg_stats->rx_frames_delta = 0;
177 pkg_stats->matches_delta = 0;
178
179
180 mod_timer(&net->can.stattimer, round_jiffies(jiffies + HZ));
181}
182
183
184
185
186
187static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list,
188 struct net_device *dev)
189{
190 struct receiver *r;
191
192 hlist_for_each_entry_rcu(r, rx_list, list) {
193 char *fmt = (r->can_id & CAN_EFF_FLAG)?
194 " %-5s %08x %08x %pK %pK %8ld %s\n" :
195 " %-5s %03x %08x %pK %pK %8ld %s\n";
196
197 seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask,
198 r->func, r->data, r->matches, r->ident);
199 }
200}
201
202static void can_print_recv_banner(struct seq_file *m)
203{
204
205
206
207
208 if (IS_ENABLED(CONFIG_64BIT))
209 seq_puts(m, " device can_id can_mask function userdata matches ident\n");
210 else
211 seq_puts(m, " device can_id can_mask function userdata matches ident\n");
212}
213
214static int can_stats_proc_show(struct seq_file *m, void *v)
215{
216 struct net *net = m->private;
217 struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
218 struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
219
220 seq_putc(m, '\n');
221 seq_printf(m, " %8ld transmitted frames (TXF)\n", pkg_stats->tx_frames);
222 seq_printf(m, " %8ld received frames (RXF)\n", pkg_stats->rx_frames);
223 seq_printf(m, " %8ld matched frames (RXMF)\n", pkg_stats->matches);
224
225 seq_putc(m, '\n');
226
227 if (net->can.stattimer.function == can_stat_update) {
228 seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
229 pkg_stats->total_rx_match_ratio);
230
231 seq_printf(m, " %8ld frames/s total tx rate (TXR)\n",
232 pkg_stats->total_tx_rate);
233 seq_printf(m, " %8ld frames/s total rx rate (RXR)\n",
234 pkg_stats->total_rx_rate);
235
236 seq_putc(m, '\n');
237
238 seq_printf(m, " %8ld %% current match ratio (CRXMR)\n",
239 pkg_stats->current_rx_match_ratio);
240
241 seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n",
242 pkg_stats->current_tx_rate);
243 seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n",
244 pkg_stats->current_rx_rate);
245
246 seq_putc(m, '\n');
247
248 seq_printf(m, " %8ld %% max match ratio (MRXMR)\n",
249 pkg_stats->max_rx_match_ratio);
250
251 seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n",
252 pkg_stats->max_tx_rate);
253 seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n",
254 pkg_stats->max_rx_rate);
255
256 seq_putc(m, '\n');
257 }
258
259 seq_printf(m, " %8ld current receive list entries (CRCV)\n",
260 rcv_lists_stats->rcv_entries);
261 seq_printf(m, " %8ld maximum receive list entries (MRCV)\n",
262 rcv_lists_stats->rcv_entries_max);
263
264 if (rcv_lists_stats->stats_reset)
265 seq_printf(m, "\n %8ld statistic resets (STR)\n",
266 rcv_lists_stats->stats_reset);
267
268 if (rcv_lists_stats->user_reset)
269 seq_printf(m, " %8ld user statistic resets (USTR)\n",
270 rcv_lists_stats->user_reset);
271
272 seq_putc(m, '\n');
273 return 0;
274}
275
276static int can_reset_stats_proc_show(struct seq_file *m, void *v)
277{
278 struct net *net = m->private;
279 struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
280 struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
281
282 user_reset = 1;
283
284 if (net->can.stattimer.function == can_stat_update) {
285 seq_printf(m, "Scheduled statistic reset #%ld.\n",
286 rcv_lists_stats->stats_reset + 1);
287 } else {
288 if (pkg_stats->jiffies_init != jiffies)
289 can_init_stats(net);
290
291 seq_printf(m, "Performed statistic reset #%ld.\n",
292 rcv_lists_stats->stats_reset);
293 }
294 return 0;
295}
296
297static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx,
298 struct net_device *dev,
299 struct can_dev_rcv_lists *dev_rcv_lists)
300{
301 if (!hlist_empty(&dev_rcv_lists->rx[idx])) {
302 can_print_recv_banner(m);
303 can_print_rcvlist(m, &dev_rcv_lists->rx[idx], dev);
304 } else
305 seq_printf(m, " (%s: no entry)\n", DNAME(dev));
306
307}
308
309static int can_rcvlist_proc_show(struct seq_file *m, void *v)
310{
311
312 int idx = (int)(long)PDE_DATA(m->file->f_inode);
313 struct net_device *dev;
314 struct can_dev_rcv_lists *dev_rcv_lists;
315 struct net *net = m->private;
316
317 seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]);
318
319 rcu_read_lock();
320
321
322 dev_rcv_lists = net->can.rx_alldev_list;
323 can_rcvlist_proc_show_one(m, idx, NULL, dev_rcv_lists);
324
325
326 for_each_netdev_rcu(net, dev) {
327 struct can_ml_priv *can_ml = can_get_ml_priv(dev);
328
329 if (can_ml)
330 can_rcvlist_proc_show_one(m, idx, dev,
331 &can_ml->dev_rcv_lists);
332 }
333
334 rcu_read_unlock();
335
336 seq_putc(m, '\n');
337 return 0;
338}
339
340static inline void can_rcvlist_proc_show_array(struct seq_file *m,
341 struct net_device *dev,
342 struct hlist_head *rcv_array,
343 unsigned int rcv_array_sz)
344{
345 unsigned int i;
346 int all_empty = 1;
347
348
349 for (i = 0; i < rcv_array_sz; i++)
350 if (!hlist_empty(&rcv_array[i])) {
351 all_empty = 0;
352 break;
353 }
354
355 if (!all_empty) {
356 can_print_recv_banner(m);
357 for (i = 0; i < rcv_array_sz; i++) {
358 if (!hlist_empty(&rcv_array[i]))
359 can_print_rcvlist(m, &rcv_array[i], dev);
360 }
361 } else
362 seq_printf(m, " (%s: no entry)\n", DNAME(dev));
363}
364
365static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v)
366{
367 struct net_device *dev;
368 struct can_dev_rcv_lists *dev_rcv_lists;
369 struct net *net = m->private;
370
371
372 seq_puts(m, "\nreceive list 'rx_sff':\n");
373
374 rcu_read_lock();
375
376
377 dev_rcv_lists = net->can.rx_alldev_list;
378 can_rcvlist_proc_show_array(m, NULL, dev_rcv_lists->rx_sff,
379 ARRAY_SIZE(dev_rcv_lists->rx_sff));
380
381
382 for_each_netdev_rcu(net, dev) {
383 struct can_ml_priv *can_ml = can_get_ml_priv(dev);
384
385 if (can_ml) {
386 dev_rcv_lists = &can_ml->dev_rcv_lists;
387 can_rcvlist_proc_show_array(m, dev, dev_rcv_lists->rx_sff,
388 ARRAY_SIZE(dev_rcv_lists->rx_sff));
389 }
390 }
391
392 rcu_read_unlock();
393
394 seq_putc(m, '\n');
395 return 0;
396}
397
398static int can_rcvlist_eff_proc_show(struct seq_file *m, void *v)
399{
400 struct net_device *dev;
401 struct can_dev_rcv_lists *dev_rcv_lists;
402 struct net *net = m->private;
403
404
405 seq_puts(m, "\nreceive list 'rx_eff':\n");
406
407 rcu_read_lock();
408
409
410 dev_rcv_lists = net->can.rx_alldev_list;
411 can_rcvlist_proc_show_array(m, NULL, dev_rcv_lists->rx_eff,
412 ARRAY_SIZE(dev_rcv_lists->rx_eff));
413
414
415 for_each_netdev_rcu(net, dev) {
416 struct can_ml_priv *can_ml = can_get_ml_priv(dev);
417
418 if (can_ml) {
419 dev_rcv_lists = &can_ml->dev_rcv_lists;
420 can_rcvlist_proc_show_array(m, dev, dev_rcv_lists->rx_eff,
421 ARRAY_SIZE(dev_rcv_lists->rx_eff));
422 }
423 }
424
425 rcu_read_unlock();
426
427 seq_putc(m, '\n');
428 return 0;
429}
430
431
432
433
434void can_init_proc(struct net *net)
435{
436
437 net->can.proc_dir = proc_net_mkdir(net, "can", net->proc_net);
438
439 if (!net->can.proc_dir) {
440 printk(KERN_INFO "can: failed to create /proc/net/can . "
441 "CONFIG_PROC_FS missing?\n");
442 return;
443 }
444
445
446 net->can.pde_stats = proc_create_net_single(CAN_PROC_STATS, 0644,
447 net->can.proc_dir, can_stats_proc_show, NULL);
448 net->can.pde_reset_stats = proc_create_net_single(CAN_PROC_RESET_STATS,
449 0644, net->can.proc_dir, can_reset_stats_proc_show,
450 NULL);
451 net->can.pde_rcvlist_err = proc_create_net_single(CAN_PROC_RCVLIST_ERR,
452 0644, net->can.proc_dir, can_rcvlist_proc_show,
453 (void *)RX_ERR);
454 net->can.pde_rcvlist_all = proc_create_net_single(CAN_PROC_RCVLIST_ALL,
455 0644, net->can.proc_dir, can_rcvlist_proc_show,
456 (void *)RX_ALL);
457 net->can.pde_rcvlist_fil = proc_create_net_single(CAN_PROC_RCVLIST_FIL,
458 0644, net->can.proc_dir, can_rcvlist_proc_show,
459 (void *)RX_FIL);
460 net->can.pde_rcvlist_inv = proc_create_net_single(CAN_PROC_RCVLIST_INV,
461 0644, net->can.proc_dir, can_rcvlist_proc_show,
462 (void *)RX_INV);
463 net->can.pde_rcvlist_eff = proc_create_net_single(CAN_PROC_RCVLIST_EFF,
464 0644, net->can.proc_dir, can_rcvlist_eff_proc_show, NULL);
465 net->can.pde_rcvlist_sff = proc_create_net_single(CAN_PROC_RCVLIST_SFF,
466 0644, net->can.proc_dir, can_rcvlist_sff_proc_show, NULL);
467}
468
469
470
471
472void can_remove_proc(struct net *net)
473{
474 if (!net->can.proc_dir)
475 return;
476
477 if (net->can.pde_stats)
478 remove_proc_entry(CAN_PROC_STATS, net->can.proc_dir);
479
480 if (net->can.pde_reset_stats)
481 remove_proc_entry(CAN_PROC_RESET_STATS, net->can.proc_dir);
482
483 if (net->can.pde_rcvlist_err)
484 remove_proc_entry(CAN_PROC_RCVLIST_ERR, net->can.proc_dir);
485
486 if (net->can.pde_rcvlist_all)
487 remove_proc_entry(CAN_PROC_RCVLIST_ALL, net->can.proc_dir);
488
489 if (net->can.pde_rcvlist_fil)
490 remove_proc_entry(CAN_PROC_RCVLIST_FIL, net->can.proc_dir);
491
492 if (net->can.pde_rcvlist_inv)
493 remove_proc_entry(CAN_PROC_RCVLIST_INV, net->can.proc_dir);
494
495 if (net->can.pde_rcvlist_eff)
496 remove_proc_entry(CAN_PROC_RCVLIST_EFF, net->can.proc_dir);
497
498 if (net->can.pde_rcvlist_sff)
499 remove_proc_entry(CAN_PROC_RCVLIST_SFF, net->can.proc_dir);
500
501 remove_proc_entry("can", net->proc_net);
502}
503