Commit | Line | Data |
---|---|---|
d77cd7fe | 1 | // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) |
0d66548a OH |
2 | /* |
3 | * proc.c - procfs support for Protocol family CAN core module | |
4 | * | |
5 | * Copyright (c) 2002-2007 Volkswagen Group Electronic Research | |
6 | * All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the name of Volkswagen nor the names of its contributors | |
17 | * may be used to endorse or promote products derived from this software | |
18 | * without specific prior written permission. | |
19 | * | |
20 | * Alternatively, provided that this notice is retained in full, this | |
21 | * software may be distributed under the terms of the GNU General | |
22 | * Public License ("GPL") version 2, in which case the provisions of the | |
23 | * GPL apply INSTEAD OF those given above. | |
24 | * | |
25 | * The provided data structures and external interfaces from this code | |
26 | * are not restricted to be used by modules with a GPL compatible license. | |
27 | * | |
28 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
29 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
30 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
31 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
32 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
33 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
34 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
35 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
36 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
37 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
38 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH | |
39 | * DAMAGE. | |
40 | * | |
0d66548a OH |
41 | */ |
42 | ||
43 | #include <linux/module.h> | |
44 | #include <linux/proc_fs.h> | |
45 | #include <linux/list.h> | |
46 | #include <linux/rcupdate.h> | |
20dd3850 | 47 | #include <linux/if_arp.h> |
ffd956ee | 48 | #include <linux/can/can-ml.h> |
0d66548a OH |
49 | #include <linux/can/core.h> |
50 | ||
51 | #include "af_can.h" | |
52 | ||
53 | /* | |
54 | * proc filenames for the PF_CAN core | |
55 | */ | |
56 | ||
0d66548a OH |
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 | ||
0d66548a OH |
66 | static int user_reset; |
67 | ||
68 | static 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", | |
0d66548a OH |
73 | }; |
74 | ||
75 | /* | |
76 | * af_can statistics stuff | |
77 | */ | |
78 | ||
cb5635a3 | 79 | static void can_init_stats(struct net *net) |
0d66548a | 80 | { |
448c7074 MKB |
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; | |
0d66548a OH |
83 | /* |
84 | * This memset function is called from a timer context (when | |
85 | * can_stattimer is active which is the default) OR in a process | |
86 | * context (reading the proc_fs when can_stattimer is disabled). | |
87 | */ | |
448c7074 MKB |
88 | memset(pkg_stats, 0, sizeof(struct can_pkg_stats)); |
89 | pkg_stats->jiffies_init = jiffies; | |
0d66548a | 90 | |
448c7074 | 91 | rcv_lists_stats->stats_reset++; |
0d66548a OH |
92 | |
93 | if (user_reset) { | |
94 | user_reset = 0; | |
448c7074 | 95 | rcv_lists_stats->user_reset++; |
0d66548a OH |
96 | } |
97 | } | |
98 | ||
99 | static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif, | |
100 | unsigned long count) | |
101 | { | |
0d66548a OH |
102 | if (oldjif == newjif) |
103 | return 0; | |
104 | ||
105 | /* see can_stat_update() - this should NEVER happen! */ | |
106 | if (count > (ULONG_MAX / HZ)) { | |
107 | printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n", | |
108 | count); | |
109 | return 99999999; | |
110 | } | |
111 | ||
24a774a4 | 112 | return (count * HZ) / (newjif - oldjif); |
0d66548a OH |
113 | } |
114 | ||
1fccb565 | 115 | void can_stat_update(struct timer_list *t) |
0d66548a | 116 | { |
564577df | 117 | struct net *net = from_timer(net, t, can.stattimer); |
448c7074 | 118 | struct can_pkg_stats *pkg_stats = net->can.pkg_stats; |
0d66548a OH |
119 | unsigned long j = jiffies; /* snapshot */ |
120 | ||
121 | /* restart counting in timer context on user request */ | |
122 | if (user_reset) | |
cb5635a3 | 123 | can_init_stats(net); |
0d66548a OH |
124 | |
125 | /* restart counting on jiffies overflow */ | |
448c7074 | 126 | if (j < pkg_stats->jiffies_init) |
cb5635a3 | 127 | can_init_stats(net); |
0d66548a OH |
128 | |
129 | /* prevent overflow in calc_rate() */ | |
448c7074 | 130 | if (pkg_stats->rx_frames > (ULONG_MAX / HZ)) |
cb5635a3 | 131 | can_init_stats(net); |
0d66548a OH |
132 | |
133 | /* prevent overflow in calc_rate() */ | |
448c7074 | 134 | if (pkg_stats->tx_frames > (ULONG_MAX / HZ)) |
cb5635a3 | 135 | can_init_stats(net); |
0d66548a OH |
136 | |
137 | /* matches overflow - very improbable */ | |
448c7074 | 138 | if (pkg_stats->matches > (ULONG_MAX / 100)) |
cb5635a3 | 139 | can_init_stats(net); |
0d66548a OH |
140 | |
141 | /* calc total values */ | |
448c7074 MKB |
142 | if (pkg_stats->rx_frames) |
143 | pkg_stats->total_rx_match_ratio = (pkg_stats->matches * 100) / | |
144 | pkg_stats->rx_frames; | |
0d66548a | 145 | |
448c7074 MKB |
146 | pkg_stats->total_tx_rate = calc_rate(pkg_stats->jiffies_init, j, |
147 | pkg_stats->tx_frames); | |
148 | pkg_stats->total_rx_rate = calc_rate(pkg_stats->jiffies_init, j, | |
149 | pkg_stats->rx_frames); | |
0d66548a OH |
150 | |
151 | /* calc current values */ | |
448c7074 MKB |
152 | if (pkg_stats->rx_frames_delta) |
153 | pkg_stats->current_rx_match_ratio = | |
154 | (pkg_stats->matches_delta * 100) / | |
155 | pkg_stats->rx_frames_delta; | |
0d66548a | 156 | |
448c7074 MKB |
157 | pkg_stats->current_tx_rate = calc_rate(0, HZ, pkg_stats->tx_frames_delta); |
158 | pkg_stats->current_rx_rate = calc_rate(0, HZ, pkg_stats->rx_frames_delta); | |
0d66548a OH |
159 | |
160 | /* check / update maximum values */ | |
448c7074 MKB |
161 | if (pkg_stats->max_tx_rate < pkg_stats->current_tx_rate) |
162 | pkg_stats->max_tx_rate = pkg_stats->current_tx_rate; | |
0d66548a | 163 | |
448c7074 MKB |
164 | if (pkg_stats->max_rx_rate < pkg_stats->current_rx_rate) |
165 | pkg_stats->max_rx_rate = pkg_stats->current_rx_rate; | |
0d66548a | 166 | |
448c7074 MKB |
167 | if (pkg_stats->max_rx_match_ratio < pkg_stats->current_rx_match_ratio) |
168 | pkg_stats->max_rx_match_ratio = pkg_stats->current_rx_match_ratio; | |
0d66548a OH |
169 | |
170 | /* clear values for 'current rate' calculation */ | |
448c7074 MKB |
171 | pkg_stats->tx_frames_delta = 0; |
172 | pkg_stats->rx_frames_delta = 0; | |
173 | pkg_stats->matches_delta = 0; | |
0d66548a OH |
174 | |
175 | /* restart timer (one second) */ | |
564577df | 176 | mod_timer(&net->can.stattimer, round_jiffies(jiffies + HZ)); |
0d66548a OH |
177 | } |
178 | ||
179 | /* | |
180 | * proc read functions | |
0d66548a OH |
181 | */ |
182 | ||
ea00b8e2 AD |
183 | static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list, |
184 | struct net_device *dev) | |
0d66548a OH |
185 | { |
186 | struct receiver *r; | |
0d66548a | 187 | |
b67bfe0d | 188 | hlist_for_each_entry_rcu(r, rx_list, list) { |
0d66548a | 189 | char *fmt = (r->can_id & CAN_EFF_FLAG)? |
12e6c419 OH |
190 | " %-5s %08x %08x %pK %pK %8ld %s\n" : |
191 | " %-5s %03x %08x %pK %pK %8ld %s\n"; | |
0d66548a | 192 | |
ea00b8e2 | 193 | seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask, |
12e6c419 | 194 | r->func, r->data, r->matches, r->ident); |
0d66548a | 195 | } |
0d66548a OH |
196 | } |
197 | ||
ea00b8e2 | 198 | static void can_print_recv_banner(struct seq_file *m) |
0d66548a OH |
199 | { |
200 | /* | |
201 | * can1. 00000000 00000000 00000000 | |
202 | * ....... 0 tp20 | |
203 | */ | |
e6b031d3 EF |
204 | if (IS_ENABLED(CONFIG_64BIT)) |
205 | seq_puts(m, " device can_id can_mask function userdata matches ident\n"); | |
206 | else | |
207 | seq_puts(m, " device can_id can_mask function userdata matches ident\n"); | |
0d66548a OH |
208 | } |
209 | ||
ea00b8e2 | 210 | static int can_stats_proc_show(struct seq_file *m, void *v) |
0d66548a | 211 | { |
cb5635a3 | 212 | struct net *net = m->private; |
448c7074 MKB |
213 | struct can_pkg_stats *pkg_stats = net->can.pkg_stats; |
214 | struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats; | |
cb5635a3 | 215 | |
ea00b8e2 | 216 | seq_putc(m, '\n'); |
448c7074 MKB |
217 | seq_printf(m, " %8ld transmitted frames (TXF)\n", pkg_stats->tx_frames); |
218 | seq_printf(m, " %8ld received frames (RXF)\n", pkg_stats->rx_frames); | |
219 | seq_printf(m, " %8ld matched frames (RXMF)\n", pkg_stats->matches); | |
0d66548a | 220 | |
ea00b8e2 | 221 | seq_putc(m, '\n'); |
0d66548a | 222 | |
564577df | 223 | if (net->can.stattimer.function == can_stat_update) { |
ea00b8e2 | 224 | seq_printf(m, " %8ld %% total match ratio (RXMR)\n", |
448c7074 | 225 | pkg_stats->total_rx_match_ratio); |
0d66548a | 226 | |
ea00b8e2 | 227 | seq_printf(m, " %8ld frames/s total tx rate (TXR)\n", |
448c7074 | 228 | pkg_stats->total_tx_rate); |
ea00b8e2 | 229 | seq_printf(m, " %8ld frames/s total rx rate (RXR)\n", |
448c7074 | 230 | pkg_stats->total_rx_rate); |
0d66548a | 231 | |
ea00b8e2 | 232 | seq_putc(m, '\n'); |
0d66548a | 233 | |
ea00b8e2 | 234 | seq_printf(m, " %8ld %% current match ratio (CRXMR)\n", |
448c7074 | 235 | pkg_stats->current_rx_match_ratio); |
0d66548a | 236 | |
ea00b8e2 | 237 | seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n", |
448c7074 | 238 | pkg_stats->current_tx_rate); |
ea00b8e2 | 239 | seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n", |
448c7074 | 240 | pkg_stats->current_rx_rate); |
0d66548a | 241 | |
ea00b8e2 | 242 | seq_putc(m, '\n'); |
0d66548a | 243 | |
ea00b8e2 | 244 | seq_printf(m, " %8ld %% max match ratio (MRXMR)\n", |
448c7074 | 245 | pkg_stats->max_rx_match_ratio); |
0d66548a | 246 | |
ea00b8e2 | 247 | seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n", |
448c7074 | 248 | pkg_stats->max_tx_rate); |
ea00b8e2 | 249 | seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n", |
448c7074 | 250 | pkg_stats->max_rx_rate); |
0d66548a | 251 | |
ea00b8e2 | 252 | seq_putc(m, '\n'); |
0d66548a OH |
253 | } |
254 | ||
ea00b8e2 | 255 | seq_printf(m, " %8ld current receive list entries (CRCV)\n", |
448c7074 | 256 | rcv_lists_stats->rcv_entries); |
ea00b8e2 | 257 | seq_printf(m, " %8ld maximum receive list entries (MRCV)\n", |
448c7074 | 258 | rcv_lists_stats->rcv_entries_max); |
0d66548a | 259 | |
448c7074 | 260 | if (rcv_lists_stats->stats_reset) |
ea00b8e2 | 261 | seq_printf(m, "\n %8ld statistic resets (STR)\n", |
448c7074 | 262 | rcv_lists_stats->stats_reset); |
0d66548a | 263 | |
448c7074 | 264 | if (rcv_lists_stats->user_reset) |
ea00b8e2 | 265 | seq_printf(m, " %8ld user statistic resets (USTR)\n", |
448c7074 | 266 | rcv_lists_stats->user_reset); |
0d66548a | 267 | |
ea00b8e2 AD |
268 | seq_putc(m, '\n'); |
269 | return 0; | |
0d66548a OH |
270 | } |
271 | ||
ea00b8e2 AD |
272 | static int can_reset_stats_proc_show(struct seq_file *m, void *v) |
273 | { | |
cb5635a3 | 274 | struct net *net = m->private; |
448c7074 MKB |
275 | struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats; |
276 | struct can_pkg_stats *pkg_stats = net->can.pkg_stats; | |
cb5635a3 | 277 | |
0d66548a OH |
278 | user_reset = 1; |
279 | ||
564577df | 280 | if (net->can.stattimer.function == can_stat_update) { |
ea00b8e2 | 281 | seq_printf(m, "Scheduled statistic reset #%ld.\n", |
448c7074 | 282 | rcv_lists_stats->stats_reset + 1); |
0d66548a | 283 | } else { |
448c7074 | 284 | if (pkg_stats->jiffies_init != jiffies) |
cb5635a3 | 285 | can_init_stats(net); |
0d66548a | 286 | |
ea00b8e2 | 287 | seq_printf(m, "Performed statistic reset #%ld.\n", |
448c7074 | 288 | rcv_lists_stats->stats_reset); |
0d66548a | 289 | } |
ea00b8e2 AD |
290 | return 0; |
291 | } | |
0d66548a | 292 | |
20dd3850 OH |
293 | static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx, |
294 | struct net_device *dev, | |
ff7fbea4 | 295 | struct can_dev_rcv_lists *dev_rcv_lists) |
20dd3850 | 296 | { |
ff7fbea4 | 297 | if (!hlist_empty(&dev_rcv_lists->rx[idx])) { |
20dd3850 | 298 | can_print_recv_banner(m); |
ff7fbea4 | 299 | can_print_rcvlist(m, &dev_rcv_lists->rx[idx], dev); |
20dd3850 OH |
300 | } else |
301 | seq_printf(m, " (%s: no entry)\n", DNAME(dev)); | |
302 | ||
303 | } | |
304 | ||
ea00b8e2 | 305 | static int can_rcvlist_proc_show(struct seq_file *m, void *v) |
0d66548a OH |
306 | { |
307 | /* double cast to prevent GCC warning */ | |
8e8cda6d | 308 | int idx = (int)(long)PDE_DATA(m->file->f_inode); |
20dd3850 | 309 | struct net_device *dev; |
ff7fbea4 | 310 | struct can_dev_rcv_lists *dev_rcv_lists; |
8e8cda6d | 311 | struct net *net = m->private; |
0d66548a | 312 | |
ea00b8e2 | 313 | seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]); |
0d66548a OH |
314 | |
315 | rcu_read_lock(); | |
0d66548a | 316 | |
20dd3850 | 317 | /* receive list for 'all' CAN devices (dev == NULL) */ |
ff7fbea4 MKB |
318 | dev_rcv_lists = net->can.rx_alldev_list; |
319 | can_rcvlist_proc_show_one(m, idx, NULL, dev_rcv_lists); | |
20dd3850 OH |
320 | |
321 | /* receive list for registered CAN devices */ | |
8e8cda6d | 322 | for_each_netdev_rcu(net, dev) { |
4e096a18 OR |
323 | struct can_ml_priv *can_ml = can_get_ml_priv(dev); |
324 | ||
325 | if (can_ml) | |
326 | can_rcvlist_proc_show_one(m, idx, dev, | |
327 | &can_ml->dev_rcv_lists); | |
0d66548a | 328 | } |
20dd3850 | 329 | |
0d66548a OH |
330 | rcu_read_unlock(); |
331 | ||
ea00b8e2 AD |
332 | seq_putc(m, '\n'); |
333 | return 0; | |
334 | } | |
0d66548a | 335 | |
e3d3917f OH |
336 | static inline void can_rcvlist_proc_show_array(struct seq_file *m, |
337 | struct net_device *dev, | |
338 | struct hlist_head *rcv_array, | |
339 | unsigned int rcv_array_sz) | |
20dd3850 | 340 | { |
e3d3917f | 341 | unsigned int i; |
20dd3850 OH |
342 | int all_empty = 1; |
343 | ||
48fc7f7e | 344 | /* check whether at least one list is non-empty */ |
e3d3917f OH |
345 | for (i = 0; i < rcv_array_sz; i++) |
346 | if (!hlist_empty(&rcv_array[i])) { | |
20dd3850 OH |
347 | all_empty = 0; |
348 | break; | |
349 | } | |
350 | ||
351 | if (!all_empty) { | |
352 | can_print_recv_banner(m); | |
e3d3917f OH |
353 | for (i = 0; i < rcv_array_sz; i++) { |
354 | if (!hlist_empty(&rcv_array[i])) | |
355 | can_print_rcvlist(m, &rcv_array[i], dev); | |
20dd3850 OH |
356 | } |
357 | } else | |
358 | seq_printf(m, " (%s: no entry)\n", DNAME(dev)); | |
359 | } | |
360 | ||
ea00b8e2 | 361 | static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v) |
0d66548a | 362 | { |
20dd3850 | 363 | struct net_device *dev; |
ff7fbea4 | 364 | struct can_dev_rcv_lists *dev_rcv_lists; |
8e8cda6d | 365 | struct net *net = m->private; |
0d66548a OH |
366 | |
367 | /* RX_SFF */ | |
ea00b8e2 | 368 | seq_puts(m, "\nreceive list 'rx_sff':\n"); |
0d66548a OH |
369 | |
370 | rcu_read_lock(); | |
20dd3850 OH |
371 | |
372 | /* sff receive list for 'all' CAN devices (dev == NULL) */ | |
ff7fbea4 MKB |
373 | dev_rcv_lists = net->can.rx_alldev_list; |
374 | can_rcvlist_proc_show_array(m, NULL, dev_rcv_lists->rx_sff, | |
375 | ARRAY_SIZE(dev_rcv_lists->rx_sff)); | |
20dd3850 OH |
376 | |
377 | /* sff receive list for registered CAN devices */ | |
8e8cda6d | 378 | for_each_netdev_rcu(net, dev) { |
4e096a18 OR |
379 | struct can_ml_priv *can_ml = can_get_ml_priv(dev); |
380 | ||
381 | if (can_ml) { | |
382 | dev_rcv_lists = &can_ml->dev_rcv_lists; | |
ff7fbea4 MKB |
383 | can_rcvlist_proc_show_array(m, dev, dev_rcv_lists->rx_sff, |
384 | ARRAY_SIZE(dev_rcv_lists->rx_sff)); | |
e3d3917f | 385 | } |
0d66548a | 386 | } |
20dd3850 | 387 | |
0d66548a OH |
388 | rcu_read_unlock(); |
389 | ||
ea00b8e2 AD |
390 | seq_putc(m, '\n'); |
391 | return 0; | |
392 | } | |
0d66548a | 393 | |
45c70029 OH |
394 | static int can_rcvlist_eff_proc_show(struct seq_file *m, void *v) |
395 | { | |
396 | struct net_device *dev; | |
ff7fbea4 | 397 | struct can_dev_rcv_lists *dev_rcv_lists; |
8e8cda6d | 398 | struct net *net = m->private; |
45c70029 OH |
399 | |
400 | /* RX_EFF */ | |
401 | seq_puts(m, "\nreceive list 'rx_eff':\n"); | |
402 | ||
403 | rcu_read_lock(); | |
404 | ||
405 | /* eff receive list for 'all' CAN devices (dev == NULL) */ | |
ff7fbea4 MKB |
406 | dev_rcv_lists = net->can.rx_alldev_list; |
407 | can_rcvlist_proc_show_array(m, NULL, dev_rcv_lists->rx_eff, | |
408 | ARRAY_SIZE(dev_rcv_lists->rx_eff)); | |
45c70029 OH |
409 | |
410 | /* eff receive list for registered CAN devices */ | |
8e8cda6d | 411 | for_each_netdev_rcu(net, dev) { |
4e096a18 OR |
412 | struct can_ml_priv *can_ml = can_get_ml_priv(dev); |
413 | ||
414 | if (can_ml) { | |
415 | dev_rcv_lists = &can_ml->dev_rcv_lists; | |
ff7fbea4 MKB |
416 | can_rcvlist_proc_show_array(m, dev, dev_rcv_lists->rx_eff, |
417 | ARRAY_SIZE(dev_rcv_lists->rx_eff)); | |
45c70029 OH |
418 | } |
419 | } | |
420 | ||
421 | rcu_read_unlock(); | |
422 | ||
423 | seq_putc(m, '\n'); | |
424 | return 0; | |
425 | } | |
426 | ||
0d66548a OH |
427 | /* |
428 | * can_init_proc - create main CAN proc directory and procfs entries | |
429 | */ | |
8e8cda6d | 430 | void can_init_proc(struct net *net) |
0d66548a OH |
431 | { |
432 | /* create /proc/net/can directory */ | |
8e8cda6d | 433 | net->can.proc_dir = proc_net_mkdir(net, "can", net->proc_net); |
0d66548a | 434 | |
8e8cda6d MK |
435 | if (!net->can.proc_dir) { |
436 | printk(KERN_INFO "can: failed to create /proc/net/can . " | |
437 | "CONFIG_PROC_FS missing?\n"); | |
0d66548a OH |
438 | return; |
439 | } | |
440 | ||
0d66548a | 441 | /* own procfs entries from the AF_CAN core */ |
3617d949 CH |
442 | net->can.pde_stats = proc_create_net_single(CAN_PROC_STATS, 0644, |
443 | net->can.proc_dir, can_stats_proc_show, NULL); | |
444 | net->can.pde_reset_stats = proc_create_net_single(CAN_PROC_RESET_STATS, | |
445 | 0644, net->can.proc_dir, can_reset_stats_proc_show, | |
446 | NULL); | |
447 | net->can.pde_rcvlist_err = proc_create_net_single(CAN_PROC_RCVLIST_ERR, | |
448 | 0644, net->can.proc_dir, can_rcvlist_proc_show, | |
449 | (void *)RX_ERR); | |
450 | net->can.pde_rcvlist_all = proc_create_net_single(CAN_PROC_RCVLIST_ALL, | |
451 | 0644, net->can.proc_dir, can_rcvlist_proc_show, | |
452 | (void *)RX_ALL); | |
453 | net->can.pde_rcvlist_fil = proc_create_net_single(CAN_PROC_RCVLIST_FIL, | |
454 | 0644, net->can.proc_dir, can_rcvlist_proc_show, | |
455 | (void *)RX_FIL); | |
456 | net->can.pde_rcvlist_inv = proc_create_net_single(CAN_PROC_RCVLIST_INV, | |
457 | 0644, net->can.proc_dir, can_rcvlist_proc_show, | |
458 | (void *)RX_INV); | |
459 | net->can.pde_rcvlist_eff = proc_create_net_single(CAN_PROC_RCVLIST_EFF, | |
460 | 0644, net->can.proc_dir, can_rcvlist_eff_proc_show, NULL); | |
461 | net->can.pde_rcvlist_sff = proc_create_net_single(CAN_PROC_RCVLIST_SFF, | |
462 | 0644, net->can.proc_dir, can_rcvlist_sff_proc_show, NULL); | |
0d66548a OH |
463 | } |
464 | ||
465 | /* | |
466 | * can_remove_proc - remove procfs entries and main CAN proc directory | |
467 | */ | |
8e8cda6d | 468 | void can_remove_proc(struct net *net) |
0d66548a | 469 | { |
3accbfdc ZC |
470 | if (!net->can.proc_dir) |
471 | return; | |
472 | ||
8e8cda6d MK |
473 | if (net->can.pde_stats) |
474 | remove_proc_entry(CAN_PROC_STATS, net->can.proc_dir); | |
0d66548a | 475 | |
8e8cda6d MK |
476 | if (net->can.pde_reset_stats) |
477 | remove_proc_entry(CAN_PROC_RESET_STATS, net->can.proc_dir); | |
0d66548a | 478 | |
8e8cda6d MK |
479 | if (net->can.pde_rcvlist_err) |
480 | remove_proc_entry(CAN_PROC_RCVLIST_ERR, net->can.proc_dir); | |
0d66548a | 481 | |
8e8cda6d MK |
482 | if (net->can.pde_rcvlist_all) |
483 | remove_proc_entry(CAN_PROC_RCVLIST_ALL, net->can.proc_dir); | |
0d66548a | 484 | |
8e8cda6d MK |
485 | if (net->can.pde_rcvlist_fil) |
486 | remove_proc_entry(CAN_PROC_RCVLIST_FIL, net->can.proc_dir); | |
0d66548a | 487 | |
8e8cda6d MK |
488 | if (net->can.pde_rcvlist_inv) |
489 | remove_proc_entry(CAN_PROC_RCVLIST_INV, net->can.proc_dir); | |
0d66548a | 490 | |
8e8cda6d MK |
491 | if (net->can.pde_rcvlist_eff) |
492 | remove_proc_entry(CAN_PROC_RCVLIST_EFF, net->can.proc_dir); | |
0d66548a | 493 | |
8e8cda6d MK |
494 | if (net->can.pde_rcvlist_sff) |
495 | remove_proc_entry(CAN_PROC_RCVLIST_SFF, net->can.proc_dir); | |
0d66548a | 496 | |
3accbfdc | 497 | remove_proc_entry("can", net->proc_net); |
0d66548a | 498 | } |