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fba76a58 | 1 | // SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) 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 | ||
57 | #define CAN_PROC_VERSION "version" | |
58 | #define CAN_PROC_STATS "stats" | |
59 | #define CAN_PROC_RESET_STATS "reset_stats" | |
60 | #define CAN_PROC_RCVLIST_ALL "rcvlist_all" | |
61 | #define CAN_PROC_RCVLIST_FIL "rcvlist_fil" | |
62 | #define CAN_PROC_RCVLIST_INV "rcvlist_inv" | |
63 | #define CAN_PROC_RCVLIST_SFF "rcvlist_sff" | |
64 | #define CAN_PROC_RCVLIST_EFF "rcvlist_eff" | |
65 | #define CAN_PROC_RCVLIST_ERR "rcvlist_err" | |
66 | ||
0d66548a OH |
67 | static int user_reset; |
68 | ||
69 | static const char rx_list_name[][8] = { | |
70 | [RX_ERR] = "rx_err", | |
71 | [RX_ALL] = "rx_all", | |
72 | [RX_FIL] = "rx_fil", | |
73 | [RX_INV] = "rx_inv", | |
0d66548a OH |
74 | }; |
75 | ||
76 | /* | |
77 | * af_can statistics stuff | |
78 | */ | |
79 | ||
cb5635a3 | 80 | static void can_init_stats(struct net *net) |
0d66548a | 81 | { |
448c7074 MKB |
82 | struct can_pkg_stats *pkg_stats = net->can.pkg_stats; |
83 | struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats; | |
0d66548a OH |
84 | /* |
85 | * This memset function is called from a timer context (when | |
86 | * can_stattimer is active which is the default) OR in a process | |
87 | * context (reading the proc_fs when can_stattimer is disabled). | |
88 | */ | |
448c7074 MKB |
89 | memset(pkg_stats, 0, sizeof(struct can_pkg_stats)); |
90 | pkg_stats->jiffies_init = jiffies; | |
0d66548a | 91 | |
448c7074 | 92 | rcv_lists_stats->stats_reset++; |
0d66548a OH |
93 | |
94 | if (user_reset) { | |
95 | user_reset = 0; | |
448c7074 | 96 | rcv_lists_stats->user_reset++; |
0d66548a OH |
97 | } |
98 | } | |
99 | ||
100 | static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif, | |
101 | unsigned long count) | |
102 | { | |
103 | unsigned long rate; | |
104 | ||
105 | if (oldjif == newjif) | |
106 | return 0; | |
107 | ||
108 | /* see can_stat_update() - this should NEVER happen! */ | |
109 | if (count > (ULONG_MAX / HZ)) { | |
110 | printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n", | |
111 | count); | |
112 | return 99999999; | |
113 | } | |
114 | ||
115 | rate = (count * HZ) / (newjif - oldjif); | |
116 | ||
117 | return rate; | |
118 | } | |
119 | ||
1fccb565 | 120 | void can_stat_update(struct timer_list *t) |
0d66548a | 121 | { |
564577df | 122 | struct net *net = from_timer(net, t, can.stattimer); |
448c7074 | 123 | struct can_pkg_stats *pkg_stats = net->can.pkg_stats; |
0d66548a OH |
124 | unsigned long j = jiffies; /* snapshot */ |
125 | ||
126 | /* restart counting in timer context on user request */ | |
127 | if (user_reset) | |
cb5635a3 | 128 | can_init_stats(net); |
0d66548a OH |
129 | |
130 | /* restart counting on jiffies overflow */ | |
448c7074 | 131 | if (j < pkg_stats->jiffies_init) |
cb5635a3 | 132 | can_init_stats(net); |
0d66548a OH |
133 | |
134 | /* prevent overflow in calc_rate() */ | |
448c7074 | 135 | if (pkg_stats->rx_frames > (ULONG_MAX / HZ)) |
cb5635a3 | 136 | can_init_stats(net); |
0d66548a OH |
137 | |
138 | /* prevent overflow in calc_rate() */ | |
448c7074 | 139 | if (pkg_stats->tx_frames > (ULONG_MAX / HZ)) |
cb5635a3 | 140 | can_init_stats(net); |
0d66548a OH |
141 | |
142 | /* matches overflow - very improbable */ | |
448c7074 | 143 | if (pkg_stats->matches > (ULONG_MAX / 100)) |
cb5635a3 | 144 | can_init_stats(net); |
0d66548a OH |
145 | |
146 | /* calc total values */ | |
448c7074 MKB |
147 | if (pkg_stats->rx_frames) |
148 | pkg_stats->total_rx_match_ratio = (pkg_stats->matches * 100) / | |
149 | pkg_stats->rx_frames; | |
0d66548a | 150 | |
448c7074 MKB |
151 | pkg_stats->total_tx_rate = calc_rate(pkg_stats->jiffies_init, j, |
152 | pkg_stats->tx_frames); | |
153 | pkg_stats->total_rx_rate = calc_rate(pkg_stats->jiffies_init, j, | |
154 | pkg_stats->rx_frames); | |
0d66548a OH |
155 | |
156 | /* calc current values */ | |
448c7074 MKB |
157 | if (pkg_stats->rx_frames_delta) |
158 | pkg_stats->current_rx_match_ratio = | |
159 | (pkg_stats->matches_delta * 100) / | |
160 | pkg_stats->rx_frames_delta; | |
0d66548a | 161 | |
448c7074 MKB |
162 | pkg_stats->current_tx_rate = calc_rate(0, HZ, pkg_stats->tx_frames_delta); |
163 | pkg_stats->current_rx_rate = calc_rate(0, HZ, pkg_stats->rx_frames_delta); | |
0d66548a OH |
164 | |
165 | /* check / update maximum values */ | |
448c7074 MKB |
166 | if (pkg_stats->max_tx_rate < pkg_stats->current_tx_rate) |
167 | pkg_stats->max_tx_rate = pkg_stats->current_tx_rate; | |
0d66548a | 168 | |
448c7074 MKB |
169 | if (pkg_stats->max_rx_rate < pkg_stats->current_rx_rate) |
170 | pkg_stats->max_rx_rate = pkg_stats->current_rx_rate; | |
0d66548a | 171 | |
448c7074 MKB |
172 | if (pkg_stats->max_rx_match_ratio < pkg_stats->current_rx_match_ratio) |
173 | pkg_stats->max_rx_match_ratio = pkg_stats->current_rx_match_ratio; | |
0d66548a OH |
174 | |
175 | /* clear values for 'current rate' calculation */ | |
448c7074 MKB |
176 | pkg_stats->tx_frames_delta = 0; |
177 | pkg_stats->rx_frames_delta = 0; | |
178 | pkg_stats->matches_delta = 0; | |
0d66548a OH |
179 | |
180 | /* restart timer (one second) */ | |
564577df | 181 | mod_timer(&net->can.stattimer, round_jiffies(jiffies + HZ)); |
0d66548a OH |
182 | } |
183 | ||
184 | /* | |
185 | * proc read functions | |
0d66548a OH |
186 | */ |
187 | ||
ea00b8e2 AD |
188 | static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list, |
189 | struct net_device *dev) | |
0d66548a OH |
190 | { |
191 | struct receiver *r; | |
0d66548a | 192 | |
b67bfe0d | 193 | hlist_for_each_entry_rcu(r, rx_list, list) { |
0d66548a | 194 | char *fmt = (r->can_id & CAN_EFF_FLAG)? |
12e6c419 OH |
195 | " %-5s %08x %08x %pK %pK %8ld %s\n" : |
196 | " %-5s %03x %08x %pK %pK %8ld %s\n"; | |
0d66548a | 197 | |
ea00b8e2 | 198 | seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask, |
12e6c419 | 199 | r->func, r->data, r->matches, r->ident); |
0d66548a | 200 | } |
0d66548a OH |
201 | } |
202 | ||
ea00b8e2 | 203 | static void can_print_recv_banner(struct seq_file *m) |
0d66548a OH |
204 | { |
205 | /* | |
206 | * can1. 00000000 00000000 00000000 | |
207 | * ....... 0 tp20 | |
208 | */ | |
ea00b8e2 | 209 | seq_puts(m, " device can_id can_mask function" |
0d66548a | 210 | " userdata matches ident\n"); |
0d66548a OH |
211 | } |
212 | ||
ea00b8e2 | 213 | static int can_stats_proc_show(struct seq_file *m, void *v) |
0d66548a | 214 | { |
cb5635a3 | 215 | struct net *net = m->private; |
448c7074 MKB |
216 | struct can_pkg_stats *pkg_stats = net->can.pkg_stats; |
217 | struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats; | |
cb5635a3 | 218 | |
ea00b8e2 | 219 | seq_putc(m, '\n'); |
448c7074 MKB |
220 | seq_printf(m, " %8ld transmitted frames (TXF)\n", pkg_stats->tx_frames); |
221 | seq_printf(m, " %8ld received frames (RXF)\n", pkg_stats->rx_frames); | |
222 | seq_printf(m, " %8ld matched frames (RXMF)\n", pkg_stats->matches); | |
0d66548a | 223 | |
ea00b8e2 | 224 | seq_putc(m, '\n'); |
0d66548a | 225 | |
564577df | 226 | if (net->can.stattimer.function == can_stat_update) { |
ea00b8e2 | 227 | seq_printf(m, " %8ld %% total match ratio (RXMR)\n", |
448c7074 | 228 | pkg_stats->total_rx_match_ratio); |
0d66548a | 229 | |
ea00b8e2 | 230 | seq_printf(m, " %8ld frames/s total tx rate (TXR)\n", |
448c7074 | 231 | pkg_stats->total_tx_rate); |
ea00b8e2 | 232 | seq_printf(m, " %8ld frames/s total rx rate (RXR)\n", |
448c7074 | 233 | pkg_stats->total_rx_rate); |
0d66548a | 234 | |
ea00b8e2 | 235 | seq_putc(m, '\n'); |
0d66548a | 236 | |
ea00b8e2 | 237 | seq_printf(m, " %8ld %% current match ratio (CRXMR)\n", |
448c7074 | 238 | pkg_stats->current_rx_match_ratio); |
0d66548a | 239 | |
ea00b8e2 | 240 | seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n", |
448c7074 | 241 | pkg_stats->current_tx_rate); |
ea00b8e2 | 242 | seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n", |
448c7074 | 243 | pkg_stats->current_rx_rate); |
0d66548a | 244 | |
ea00b8e2 | 245 | seq_putc(m, '\n'); |
0d66548a | 246 | |
ea00b8e2 | 247 | seq_printf(m, " %8ld %% max match ratio (MRXMR)\n", |
448c7074 | 248 | pkg_stats->max_rx_match_ratio); |
0d66548a | 249 | |
ea00b8e2 | 250 | seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n", |
448c7074 | 251 | pkg_stats->max_tx_rate); |
ea00b8e2 | 252 | seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n", |
448c7074 | 253 | pkg_stats->max_rx_rate); |
0d66548a | 254 | |
ea00b8e2 | 255 | seq_putc(m, '\n'); |
0d66548a OH |
256 | } |
257 | ||
ea00b8e2 | 258 | seq_printf(m, " %8ld current receive list entries (CRCV)\n", |
448c7074 | 259 | rcv_lists_stats->rcv_entries); |
ea00b8e2 | 260 | seq_printf(m, " %8ld maximum receive list entries (MRCV)\n", |
448c7074 | 261 | rcv_lists_stats->rcv_entries_max); |
0d66548a | 262 | |
448c7074 | 263 | if (rcv_lists_stats->stats_reset) |
ea00b8e2 | 264 | seq_printf(m, "\n %8ld statistic resets (STR)\n", |
448c7074 | 265 | rcv_lists_stats->stats_reset); |
0d66548a | 266 | |
448c7074 | 267 | if (rcv_lists_stats->user_reset) |
ea00b8e2 | 268 | seq_printf(m, " %8ld user statistic resets (USTR)\n", |
448c7074 | 269 | rcv_lists_stats->user_reset); |
0d66548a | 270 | |
ea00b8e2 AD |
271 | seq_putc(m, '\n'); |
272 | return 0; | |
0d66548a OH |
273 | } |
274 | ||
ea00b8e2 AD |
275 | static int can_reset_stats_proc_show(struct seq_file *m, void *v) |
276 | { | |
cb5635a3 | 277 | struct net *net = m->private; |
448c7074 MKB |
278 | struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats; |
279 | struct can_pkg_stats *pkg_stats = net->can.pkg_stats; | |
cb5635a3 | 280 | |
0d66548a OH |
281 | user_reset = 1; |
282 | ||
564577df | 283 | if (net->can.stattimer.function == can_stat_update) { |
ea00b8e2 | 284 | seq_printf(m, "Scheduled statistic reset #%ld.\n", |
448c7074 | 285 | rcv_lists_stats->stats_reset + 1); |
0d66548a | 286 | } else { |
448c7074 | 287 | if (pkg_stats->jiffies_init != jiffies) |
cb5635a3 | 288 | can_init_stats(net); |
0d66548a | 289 | |
ea00b8e2 | 290 | seq_printf(m, "Performed statistic reset #%ld.\n", |
448c7074 | 291 | rcv_lists_stats->stats_reset); |
0d66548a | 292 | } |
ea00b8e2 AD |
293 | return 0; |
294 | } | |
0d66548a | 295 | |
ea00b8e2 | 296 | static int can_version_proc_show(struct seq_file *m, void *v) |
0d66548a | 297 | { |
ea00b8e2 AD |
298 | seq_printf(m, "%s\n", CAN_VERSION_STRING); |
299 | return 0; | |
300 | } | |
0d66548a | 301 | |
20dd3850 OH |
302 | static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx, |
303 | struct net_device *dev, | |
ff7fbea4 | 304 | struct can_dev_rcv_lists *dev_rcv_lists) |
20dd3850 | 305 | { |
ff7fbea4 | 306 | if (!hlist_empty(&dev_rcv_lists->rx[idx])) { |
20dd3850 | 307 | can_print_recv_banner(m); |
ff7fbea4 | 308 | can_print_rcvlist(m, &dev_rcv_lists->rx[idx], dev); |
20dd3850 OH |
309 | } else |
310 | seq_printf(m, " (%s: no entry)\n", DNAME(dev)); | |
311 | ||
312 | } | |
313 | ||
ea00b8e2 | 314 | static int can_rcvlist_proc_show(struct seq_file *m, void *v) |
0d66548a OH |
315 | { |
316 | /* double cast to prevent GCC warning */ | |
8e8cda6d | 317 | int idx = (int)(long)PDE_DATA(m->file->f_inode); |
20dd3850 | 318 | struct net_device *dev; |
ff7fbea4 | 319 | struct can_dev_rcv_lists *dev_rcv_lists; |
8e8cda6d | 320 | struct net *net = m->private; |
0d66548a | 321 | |
ea00b8e2 | 322 | seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]); |
0d66548a OH |
323 | |
324 | rcu_read_lock(); | |
0d66548a | 325 | |
20dd3850 | 326 | /* receive list for 'all' CAN devices (dev == NULL) */ |
ff7fbea4 MKB |
327 | dev_rcv_lists = net->can.rx_alldev_list; |
328 | can_rcvlist_proc_show_one(m, idx, NULL, dev_rcv_lists); | |
20dd3850 OH |
329 | |
330 | /* receive list for registered CAN devices */ | |
8e8cda6d | 331 | for_each_netdev_rcu(net, dev) { |
20dd3850 OH |
332 | if (dev->type == ARPHRD_CAN && dev->ml_priv) |
333 | can_rcvlist_proc_show_one(m, idx, dev, dev->ml_priv); | |
0d66548a | 334 | } |
20dd3850 | 335 | |
0d66548a OH |
336 | rcu_read_unlock(); |
337 | ||
ea00b8e2 AD |
338 | seq_putc(m, '\n'); |
339 | return 0; | |
340 | } | |
0d66548a | 341 | |
e3d3917f OH |
342 | static inline void can_rcvlist_proc_show_array(struct seq_file *m, |
343 | struct net_device *dev, | |
344 | struct hlist_head *rcv_array, | |
345 | unsigned int rcv_array_sz) | |
20dd3850 | 346 | { |
e3d3917f | 347 | unsigned int i; |
20dd3850 OH |
348 | int all_empty = 1; |
349 | ||
48fc7f7e | 350 | /* check whether at least one list is non-empty */ |
e3d3917f OH |
351 | for (i = 0; i < rcv_array_sz; i++) |
352 | if (!hlist_empty(&rcv_array[i])) { | |
20dd3850 OH |
353 | all_empty = 0; |
354 | break; | |
355 | } | |
356 | ||
357 | if (!all_empty) { | |
358 | can_print_recv_banner(m); | |
e3d3917f OH |
359 | for (i = 0; i < rcv_array_sz; i++) { |
360 | if (!hlist_empty(&rcv_array[i])) | |
361 | can_print_rcvlist(m, &rcv_array[i], dev); | |
20dd3850 OH |
362 | } |
363 | } else | |
364 | seq_printf(m, " (%s: no entry)\n", DNAME(dev)); | |
365 | } | |
366 | ||
ea00b8e2 | 367 | static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v) |
0d66548a | 368 | { |
20dd3850 | 369 | struct net_device *dev; |
ff7fbea4 | 370 | struct can_dev_rcv_lists *dev_rcv_lists; |
8e8cda6d | 371 | struct net *net = m->private; |
0d66548a OH |
372 | |
373 | /* RX_SFF */ | |
ea00b8e2 | 374 | seq_puts(m, "\nreceive list 'rx_sff':\n"); |
0d66548a OH |
375 | |
376 | rcu_read_lock(); | |
20dd3850 OH |
377 | |
378 | /* sff receive list for 'all' CAN devices (dev == NULL) */ | |
ff7fbea4 MKB |
379 | dev_rcv_lists = net->can.rx_alldev_list; |
380 | can_rcvlist_proc_show_array(m, NULL, dev_rcv_lists->rx_sff, | |
381 | ARRAY_SIZE(dev_rcv_lists->rx_sff)); | |
20dd3850 OH |
382 | |
383 | /* sff receive list for registered CAN devices */ | |
8e8cda6d | 384 | for_each_netdev_rcu(net, dev) { |
e3d3917f | 385 | if (dev->type == ARPHRD_CAN && dev->ml_priv) { |
ff7fbea4 MKB |
386 | dev_rcv_lists = dev->ml_priv; |
387 | can_rcvlist_proc_show_array(m, dev, dev_rcv_lists->rx_sff, | |
388 | ARRAY_SIZE(dev_rcv_lists->rx_sff)); | |
e3d3917f | 389 | } |
0d66548a | 390 | } |
20dd3850 | 391 | |
0d66548a OH |
392 | rcu_read_unlock(); |
393 | ||
ea00b8e2 AD |
394 | seq_putc(m, '\n'); |
395 | return 0; | |
396 | } | |
0d66548a | 397 | |
45c70029 OH |
398 | static int can_rcvlist_eff_proc_show(struct seq_file *m, void *v) |
399 | { | |
400 | struct net_device *dev; | |
ff7fbea4 | 401 | struct can_dev_rcv_lists *dev_rcv_lists; |
8e8cda6d | 402 | struct net *net = m->private; |
45c70029 OH |
403 | |
404 | /* RX_EFF */ | |
405 | seq_puts(m, "\nreceive list 'rx_eff':\n"); | |
406 | ||
407 | rcu_read_lock(); | |
408 | ||
409 | /* eff receive list for 'all' CAN devices (dev == NULL) */ | |
ff7fbea4 MKB |
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)); | |
45c70029 OH |
413 | |
414 | /* eff receive list for registered CAN devices */ | |
8e8cda6d | 415 | for_each_netdev_rcu(net, dev) { |
45c70029 | 416 | if (dev->type == ARPHRD_CAN && dev->ml_priv) { |
ff7fbea4 MKB |
417 | dev_rcv_lists = dev->ml_priv; |
418 | can_rcvlist_proc_show_array(m, dev, dev_rcv_lists->rx_eff, | |
419 | ARRAY_SIZE(dev_rcv_lists->rx_eff)); | |
45c70029 OH |
420 | } |
421 | } | |
422 | ||
423 | rcu_read_unlock(); | |
424 | ||
425 | seq_putc(m, '\n'); | |
426 | return 0; | |
427 | } | |
428 | ||
0d66548a OH |
429 | /* |
430 | * can_init_proc - create main CAN proc directory and procfs entries | |
431 | */ | |
8e8cda6d | 432 | void can_init_proc(struct net *net) |
0d66548a OH |
433 | { |
434 | /* create /proc/net/can directory */ | |
8e8cda6d | 435 | net->can.proc_dir = proc_net_mkdir(net, "can", net->proc_net); |
0d66548a | 436 | |
8e8cda6d MK |
437 | if (!net->can.proc_dir) { |
438 | printk(KERN_INFO "can: failed to create /proc/net/can . " | |
439 | "CONFIG_PROC_FS missing?\n"); | |
0d66548a OH |
440 | return; |
441 | } | |
442 | ||
0d66548a | 443 | /* own procfs entries from the AF_CAN core */ |
3617d949 CH |
444 | net->can.pde_version = proc_create_net_single(CAN_PROC_VERSION, 0644, |
445 | net->can.proc_dir, can_version_proc_show, NULL); | |
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); | |
0d66548a OH |
467 | } |
468 | ||
469 | /* | |
470 | * can_remove_proc - remove procfs entries and main CAN proc directory | |
471 | */ | |
8e8cda6d | 472 | void can_remove_proc(struct net *net) |
0d66548a | 473 | { |
8e8cda6d MK |
474 | if (net->can.pde_version) |
475 | remove_proc_entry(CAN_PROC_VERSION, net->can.proc_dir); | |
0d66548a | 476 | |
8e8cda6d MK |
477 | if (net->can.pde_stats) |
478 | remove_proc_entry(CAN_PROC_STATS, net->can.proc_dir); | |
0d66548a | 479 | |
8e8cda6d MK |
480 | if (net->can.pde_reset_stats) |
481 | remove_proc_entry(CAN_PROC_RESET_STATS, net->can.proc_dir); | |
0d66548a | 482 | |
8e8cda6d MK |
483 | if (net->can.pde_rcvlist_err) |
484 | remove_proc_entry(CAN_PROC_RCVLIST_ERR, net->can.proc_dir); | |
0d66548a | 485 | |
8e8cda6d MK |
486 | if (net->can.pde_rcvlist_all) |
487 | remove_proc_entry(CAN_PROC_RCVLIST_ALL, net->can.proc_dir); | |
0d66548a | 488 | |
8e8cda6d MK |
489 | if (net->can.pde_rcvlist_fil) |
490 | remove_proc_entry(CAN_PROC_RCVLIST_FIL, net->can.proc_dir); | |
0d66548a | 491 | |
8e8cda6d MK |
492 | if (net->can.pde_rcvlist_inv) |
493 | remove_proc_entry(CAN_PROC_RCVLIST_INV, net->can.proc_dir); | |
0d66548a | 494 | |
8e8cda6d MK |
495 | if (net->can.pde_rcvlist_eff) |
496 | remove_proc_entry(CAN_PROC_RCVLIST_EFF, net->can.proc_dir); | |
0d66548a | 497 | |
8e8cda6d MK |
498 | if (net->can.pde_rcvlist_sff) |
499 | remove_proc_entry(CAN_PROC_RCVLIST_SFF, net->can.proc_dir); | |
0d66548a | 500 | |
8e8cda6d MK |
501 | if (net->can.proc_dir) |
502 | remove_proc_entry("can", net->proc_net); | |
0d66548a | 503 | } |