blob: 3b6dd3180492109cd8203b6933e7d0af9a3c9c87 [file] [log] [blame]
Oliver Hartkopp0d665482007-11-16 15:52:17 -08001/*
2 * proc.c - procfs support for Protocol family CAN core module
3 *
4 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of Volkswagen nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * Alternatively, provided that this notice is retained in full, this
20 * software may be distributed under the terms of the GNU General
21 * Public License ("GPL") version 2, in which case the provisions of the
22 * GPL apply INSTEAD OF those given above.
23 *
24 * The provided data structures and external interfaces from this code
25 * are not restricted to be used by modules with a GPL compatible license.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
38 * DAMAGE.
39 *
Oliver Hartkopp0d665482007-11-16 15:52:17 -080040 */
41
42#include <linux/module.h>
43#include <linux/proc_fs.h>
44#include <linux/list.h>
45#include <linux/rcupdate.h>
Oliver Hartkopp20dd3852009-12-25 06:47:47 +000046#include <linux/if_arp.h>
Oliver Hartkopp0d665482007-11-16 15:52:17 -080047#include <linux/can/core.h>
48
49#include "af_can.h"
50
51/*
52 * proc filenames for the PF_CAN core
53 */
54
55#define CAN_PROC_VERSION "version"
56#define CAN_PROC_STATS "stats"
57#define CAN_PROC_RESET_STATS "reset_stats"
58#define CAN_PROC_RCVLIST_ALL "rcvlist_all"
59#define CAN_PROC_RCVLIST_FIL "rcvlist_fil"
60#define CAN_PROC_RCVLIST_INV "rcvlist_inv"
61#define CAN_PROC_RCVLIST_SFF "rcvlist_sff"
62#define CAN_PROC_RCVLIST_EFF "rcvlist_eff"
63#define CAN_PROC_RCVLIST_ERR "rcvlist_err"
64
65static struct proc_dir_entry *can_dir;
66static struct proc_dir_entry *pde_version;
67static struct proc_dir_entry *pde_stats;
68static struct proc_dir_entry *pde_reset_stats;
69static struct proc_dir_entry *pde_rcvlist_all;
70static struct proc_dir_entry *pde_rcvlist_fil;
71static struct proc_dir_entry *pde_rcvlist_inv;
72static struct proc_dir_entry *pde_rcvlist_sff;
73static struct proc_dir_entry *pde_rcvlist_eff;
74static struct proc_dir_entry *pde_rcvlist_err;
75
76static int user_reset;
77
78static const char rx_list_name[][8] = {
79 [RX_ERR] = "rx_err",
80 [RX_ALL] = "rx_all",
81 [RX_FIL] = "rx_fil",
82 [RX_INV] = "rx_inv",
83 [RX_EFF] = "rx_eff",
84};
85
86/*
87 * af_can statistics stuff
88 */
89
90static void can_init_stats(void)
91{
92 /*
93 * This memset function is called from a timer context (when
94 * can_stattimer is active which is the default) OR in a process
95 * context (reading the proc_fs when can_stattimer is disabled).
96 */
97 memset(&can_stats, 0, sizeof(can_stats));
98 can_stats.jiffies_init = jiffies;
99
100 can_pstats.stats_reset++;
101
102 if (user_reset) {
103 user_reset = 0;
104 can_pstats.user_reset++;
105 }
106}
107
108static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
109 unsigned long count)
110{
111 unsigned long rate;
112
113 if (oldjif == newjif)
114 return 0;
115
116 /* see can_stat_update() - this should NEVER happen! */
117 if (count > (ULONG_MAX / HZ)) {
118 printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n",
119 count);
120 return 99999999;
121 }
122
123 rate = (count * HZ) / (newjif - oldjif);
124
125 return rate;
126}
127
128void can_stat_update(unsigned long data)
129{
130 unsigned long j = jiffies; /* snapshot */
131
132 /* restart counting in timer context on user request */
133 if (user_reset)
134 can_init_stats();
135
136 /* restart counting on jiffies overflow */
137 if (j < can_stats.jiffies_init)
138 can_init_stats();
139
140 /* prevent overflow in calc_rate() */
141 if (can_stats.rx_frames > (ULONG_MAX / HZ))
142 can_init_stats();
143
144 /* prevent overflow in calc_rate() */
145 if (can_stats.tx_frames > (ULONG_MAX / HZ))
146 can_init_stats();
147
148 /* matches overflow - very improbable */
149 if (can_stats.matches > (ULONG_MAX / 100))
150 can_init_stats();
151
152 /* calc total values */
153 if (can_stats.rx_frames)
154 can_stats.total_rx_match_ratio = (can_stats.matches * 100) /
155 can_stats.rx_frames;
156
157 can_stats.total_tx_rate = calc_rate(can_stats.jiffies_init, j,
158 can_stats.tx_frames);
159 can_stats.total_rx_rate = calc_rate(can_stats.jiffies_init, j,
160 can_stats.rx_frames);
161
162 /* calc current values */
163 if (can_stats.rx_frames_delta)
164 can_stats.current_rx_match_ratio =
165 (can_stats.matches_delta * 100) /
166 can_stats.rx_frames_delta;
167
168 can_stats.current_tx_rate = calc_rate(0, HZ, can_stats.tx_frames_delta);
169 can_stats.current_rx_rate = calc_rate(0, HZ, can_stats.rx_frames_delta);
170
171 /* check / update maximum values */
172 if (can_stats.max_tx_rate < can_stats.current_tx_rate)
173 can_stats.max_tx_rate = can_stats.current_tx_rate;
174
175 if (can_stats.max_rx_rate < can_stats.current_rx_rate)
176 can_stats.max_rx_rate = can_stats.current_rx_rate;
177
178 if (can_stats.max_rx_match_ratio < can_stats.current_rx_match_ratio)
179 can_stats.max_rx_match_ratio = can_stats.current_rx_match_ratio;
180
181 /* clear values for 'current rate' calculation */
182 can_stats.tx_frames_delta = 0;
183 can_stats.rx_frames_delta = 0;
184 can_stats.matches_delta = 0;
185
186 /* restart timer (one second) */
187 mod_timer(&can_stattimer, round_jiffies(jiffies + HZ));
188}
189
190/*
191 * proc read functions
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800192 */
193
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000194static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list,
195 struct net_device *dev)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800196{
197 struct receiver *r;
198 struct hlist_node *n;
199
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800200 hlist_for_each_entry_rcu(r, n, rx_list, list) {
201 char *fmt = (r->can_id & CAN_EFF_FLAG)?
Oliver Hartkopp12e6c412011-05-26 04:57:53 +0000202 " %-5s %08x %08x %pK %pK %8ld %s\n" :
203 " %-5s %03x %08x %pK %pK %8ld %s\n";
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800204
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000205 seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask,
Oliver Hartkopp12e6c412011-05-26 04:57:53 +0000206 r->func, r->data, r->matches, r->ident);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800207 }
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800208}
209
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000210static void can_print_recv_banner(struct seq_file *m)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800211{
212 /*
213 * can1. 00000000 00000000 00000000
214 * ....... 0 tp20
215 */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000216 seq_puts(m, " device can_id can_mask function"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800217 " userdata matches ident\n");
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800218}
219
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000220static int can_stats_proc_show(struct seq_file *m, void *v)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800221{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000222 seq_putc(m, '\n');
223 seq_printf(m, " %8ld transmitted frames (TXF)\n", can_stats.tx_frames);
224 seq_printf(m, " %8ld received frames (RXF)\n", can_stats.rx_frames);
225 seq_printf(m, " %8ld matched frames (RXMF)\n", can_stats.matches);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800226
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000227 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800228
229 if (can_stattimer.function == can_stat_update) {
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000230 seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800231 can_stats.total_rx_match_ratio);
232
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000233 seq_printf(m, " %8ld frames/s total tx rate (TXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800234 can_stats.total_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000235 seq_printf(m, " %8ld frames/s total rx rate (RXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800236 can_stats.total_rx_rate);
237
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000238 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800239
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000240 seq_printf(m, " %8ld %% current match ratio (CRXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800241 can_stats.current_rx_match_ratio);
242
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000243 seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800244 can_stats.current_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000245 seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800246 can_stats.current_rx_rate);
247
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000248 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800249
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000250 seq_printf(m, " %8ld %% max match ratio (MRXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800251 can_stats.max_rx_match_ratio);
252
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000253 seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800254 can_stats.max_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000255 seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800256 can_stats.max_rx_rate);
257
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000258 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800259 }
260
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000261 seq_printf(m, " %8ld current receive list entries (CRCV)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800262 can_pstats.rcv_entries);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000263 seq_printf(m, " %8ld maximum receive list entries (MRCV)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800264 can_pstats.rcv_entries_max);
265
266 if (can_pstats.stats_reset)
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000267 seq_printf(m, "\n %8ld statistic resets (STR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800268 can_pstats.stats_reset);
269
270 if (can_pstats.user_reset)
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000271 seq_printf(m, " %8ld user statistic resets (USTR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800272 can_pstats.user_reset);
273
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000274 seq_putc(m, '\n');
275 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800276}
277
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000278static int can_stats_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800279{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000280 return single_open(file, can_stats_proc_show, NULL);
281}
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800282
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000283static const struct file_operations can_stats_proc_fops = {
284 .owner = THIS_MODULE,
285 .open = can_stats_proc_open,
286 .read = seq_read,
287 .llseek = seq_lseek,
288 .release = single_release,
289};
290
291static int can_reset_stats_proc_show(struct seq_file *m, void *v)
292{
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800293 user_reset = 1;
294
295 if (can_stattimer.function == can_stat_update) {
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000296 seq_printf(m, "Scheduled statistic reset #%ld.\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800297 can_pstats.stats_reset + 1);
298
299 } else {
300 if (can_stats.jiffies_init != jiffies)
301 can_init_stats();
302
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000303 seq_printf(m, "Performed statistic reset #%ld.\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800304 can_pstats.stats_reset);
305 }
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000306 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800307}
308
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000309static int can_reset_stats_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800310{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000311 return single_open(file, can_reset_stats_proc_show, NULL);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800312}
313
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000314static const struct file_operations can_reset_stats_proc_fops = {
315 .owner = THIS_MODULE,
316 .open = can_reset_stats_proc_open,
317 .read = seq_read,
318 .llseek = seq_lseek,
319 .release = single_release,
320};
321
322static int can_version_proc_show(struct seq_file *m, void *v)
323{
324 seq_printf(m, "%s\n", CAN_VERSION_STRING);
325 return 0;
326}
327
328static int can_version_proc_open(struct inode *inode, struct file *file)
329{
330 return single_open(file, can_version_proc_show, NULL);
331}
332
333static const struct file_operations can_version_proc_fops = {
334 .owner = THIS_MODULE,
335 .open = can_version_proc_open,
336 .read = seq_read,
337 .llseek = seq_lseek,
338 .release = single_release,
339};
340
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000341static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx,
342 struct net_device *dev,
343 struct dev_rcv_lists *d)
344{
345 if (!hlist_empty(&d->rx[idx])) {
346 can_print_recv_banner(m);
347 can_print_rcvlist(m, &d->rx[idx], dev);
348 } else
349 seq_printf(m, " (%s: no entry)\n", DNAME(dev));
350
351}
352
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000353static int can_rcvlist_proc_show(struct seq_file *m, void *v)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800354{
355 /* double cast to prevent GCC warning */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000356 int idx = (int)(long)m->private;
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000357 struct net_device *dev;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800358 struct dev_rcv_lists *d;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800359
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000360 seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800361
362 rcu_read_lock();
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800363
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000364 /* receive list for 'all' CAN devices (dev == NULL) */
365 d = &can_rx_alldev_list;
366 can_rcvlist_proc_show_one(m, idx, NULL, d);
367
368 /* receive list for registered CAN devices */
369 for_each_netdev_rcu(&init_net, dev) {
370 if (dev->type == ARPHRD_CAN && dev->ml_priv)
371 can_rcvlist_proc_show_one(m, idx, dev, dev->ml_priv);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800372 }
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000373
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800374 rcu_read_unlock();
375
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000376 seq_putc(m, '\n');
377 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800378}
379
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000380static int can_rcvlist_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800381{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000382 return single_open(file, can_rcvlist_proc_show, PDE(inode)->data);
383}
384
385static const struct file_operations can_rcvlist_proc_fops = {
386 .owner = THIS_MODULE,
387 .open = can_rcvlist_proc_open,
388 .read = seq_read,
389 .llseek = seq_lseek,
390 .release = single_release,
391};
392
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000393static inline void can_rcvlist_sff_proc_show_one(struct seq_file *m,
394 struct net_device *dev,
395 struct dev_rcv_lists *d)
396{
397 int i;
398 int all_empty = 1;
399
400 /* check wether at least one list is non-empty */
401 for (i = 0; i < 0x800; i++)
402 if (!hlist_empty(&d->rx_sff[i])) {
403 all_empty = 0;
404 break;
405 }
406
407 if (!all_empty) {
408 can_print_recv_banner(m);
409 for (i = 0; i < 0x800; i++) {
410 if (!hlist_empty(&d->rx_sff[i]))
411 can_print_rcvlist(m, &d->rx_sff[i], dev);
412 }
413 } else
414 seq_printf(m, " (%s: no entry)\n", DNAME(dev));
415}
416
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000417static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v)
418{
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000419 struct net_device *dev;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800420 struct dev_rcv_lists *d;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800421
422 /* RX_SFF */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000423 seq_puts(m, "\nreceive list 'rx_sff':\n");
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800424
425 rcu_read_lock();
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800426
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000427 /* sff receive list for 'all' CAN devices (dev == NULL) */
428 d = &can_rx_alldev_list;
429 can_rcvlist_sff_proc_show_one(m, NULL, d);
430
431 /* sff receive list for registered CAN devices */
432 for_each_netdev_rcu(&init_net, dev) {
433 if (dev->type == ARPHRD_CAN && dev->ml_priv)
434 can_rcvlist_sff_proc_show_one(m, dev, dev->ml_priv);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800435 }
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000436
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800437 rcu_read_unlock();
438
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000439 seq_putc(m, '\n');
440 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800441}
442
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000443static int can_rcvlist_sff_proc_open(struct inode *inode, struct file *file)
444{
445 return single_open(file, can_rcvlist_sff_proc_show, NULL);
446}
447
448static const struct file_operations can_rcvlist_sff_proc_fops = {
449 .owner = THIS_MODULE,
450 .open = can_rcvlist_sff_proc_open,
451 .read = seq_read,
452 .llseek = seq_lseek,
453 .release = single_release,
454};
455
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800456/*
457 * proc utility functions
458 */
459
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800460static void can_remove_proc_readentry(const char *name)
461{
462 if (can_dir)
463 remove_proc_entry(name, can_dir);
464}
465
466/*
467 * can_init_proc - create main CAN proc directory and procfs entries
468 */
469void can_init_proc(void)
470{
471 /* create /proc/net/can directory */
472 can_dir = proc_mkdir("can", init_net.proc_net);
473
474 if (!can_dir) {
475 printk(KERN_INFO "can: failed to create /proc/net/can . "
476 "CONFIG_PROC_FS missing?\n");
477 return;
478 }
479
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800480 /* own procfs entries from the AF_CAN core */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000481 pde_version = proc_create(CAN_PROC_VERSION, 0644, can_dir,
482 &can_version_proc_fops);
483 pde_stats = proc_create(CAN_PROC_STATS, 0644, can_dir,
484 &can_stats_proc_fops);
485 pde_reset_stats = proc_create(CAN_PROC_RESET_STATS, 0644, can_dir,
486 &can_reset_stats_proc_fops);
487 pde_rcvlist_err = proc_create_data(CAN_PROC_RCVLIST_ERR, 0644, can_dir,
488 &can_rcvlist_proc_fops, (void *)RX_ERR);
489 pde_rcvlist_all = proc_create_data(CAN_PROC_RCVLIST_ALL, 0644, can_dir,
490 &can_rcvlist_proc_fops, (void *)RX_ALL);
491 pde_rcvlist_fil = proc_create_data(CAN_PROC_RCVLIST_FIL, 0644, can_dir,
492 &can_rcvlist_proc_fops, (void *)RX_FIL);
493 pde_rcvlist_inv = proc_create_data(CAN_PROC_RCVLIST_INV, 0644, can_dir,
494 &can_rcvlist_proc_fops, (void *)RX_INV);
495 pde_rcvlist_eff = proc_create_data(CAN_PROC_RCVLIST_EFF, 0644, can_dir,
496 &can_rcvlist_proc_fops, (void *)RX_EFF);
497 pde_rcvlist_sff = proc_create(CAN_PROC_RCVLIST_SFF, 0644, can_dir,
498 &can_rcvlist_sff_proc_fops);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800499}
500
501/*
502 * can_remove_proc - remove procfs entries and main CAN proc directory
503 */
504void can_remove_proc(void)
505{
506 if (pde_version)
507 can_remove_proc_readentry(CAN_PROC_VERSION);
508
509 if (pde_stats)
510 can_remove_proc_readentry(CAN_PROC_STATS);
511
512 if (pde_reset_stats)
513 can_remove_proc_readentry(CAN_PROC_RESET_STATS);
514
515 if (pde_rcvlist_err)
516 can_remove_proc_readentry(CAN_PROC_RCVLIST_ERR);
517
518 if (pde_rcvlist_all)
519 can_remove_proc_readentry(CAN_PROC_RCVLIST_ALL);
520
521 if (pde_rcvlist_fil)
522 can_remove_proc_readentry(CAN_PROC_RCVLIST_FIL);
523
524 if (pde_rcvlist_inv)
525 can_remove_proc_readentry(CAN_PROC_RCVLIST_INV);
526
527 if (pde_rcvlist_eff)
528 can_remove_proc_readentry(CAN_PROC_RCVLIST_EFF);
529
530 if (pde_rcvlist_sff)
531 can_remove_proc_readentry(CAN_PROC_RCVLIST_SFF);
532
533 if (can_dir)
534 proc_net_remove(&init_net, "can");
535}