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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
Oliver Hartkopp20dd3852009-12-25 06:47:47 +000086/* receive filters subscribed for 'all' CAN devices */
87extern struct dev_rcv_lists can_rx_alldev_list;
88
Oliver Hartkopp0d665482007-11-16 15:52:17 -080089/*
90 * af_can statistics stuff
91 */
92
93static void can_init_stats(void)
94{
95 /*
96 * This memset function is called from a timer context (when
97 * can_stattimer is active which is the default) OR in a process
98 * context (reading the proc_fs when can_stattimer is disabled).
99 */
100 memset(&can_stats, 0, sizeof(can_stats));
101 can_stats.jiffies_init = jiffies;
102
103 can_pstats.stats_reset++;
104
105 if (user_reset) {
106 user_reset = 0;
107 can_pstats.user_reset++;
108 }
109}
110
111static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
112 unsigned long count)
113{
114 unsigned long rate;
115
116 if (oldjif == newjif)
117 return 0;
118
119 /* see can_stat_update() - this should NEVER happen! */
120 if (count > (ULONG_MAX / HZ)) {
121 printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n",
122 count);
123 return 99999999;
124 }
125
126 rate = (count * HZ) / (newjif - oldjif);
127
128 return rate;
129}
130
131void can_stat_update(unsigned long data)
132{
133 unsigned long j = jiffies; /* snapshot */
134
135 /* restart counting in timer context on user request */
136 if (user_reset)
137 can_init_stats();
138
139 /* restart counting on jiffies overflow */
140 if (j < can_stats.jiffies_init)
141 can_init_stats();
142
143 /* prevent overflow in calc_rate() */
144 if (can_stats.rx_frames > (ULONG_MAX / HZ))
145 can_init_stats();
146
147 /* prevent overflow in calc_rate() */
148 if (can_stats.tx_frames > (ULONG_MAX / HZ))
149 can_init_stats();
150
151 /* matches overflow - very improbable */
152 if (can_stats.matches > (ULONG_MAX / 100))
153 can_init_stats();
154
155 /* calc total values */
156 if (can_stats.rx_frames)
157 can_stats.total_rx_match_ratio = (can_stats.matches * 100) /
158 can_stats.rx_frames;
159
160 can_stats.total_tx_rate = calc_rate(can_stats.jiffies_init, j,
161 can_stats.tx_frames);
162 can_stats.total_rx_rate = calc_rate(can_stats.jiffies_init, j,
163 can_stats.rx_frames);
164
165 /* calc current values */
166 if (can_stats.rx_frames_delta)
167 can_stats.current_rx_match_ratio =
168 (can_stats.matches_delta * 100) /
169 can_stats.rx_frames_delta;
170
171 can_stats.current_tx_rate = calc_rate(0, HZ, can_stats.tx_frames_delta);
172 can_stats.current_rx_rate = calc_rate(0, HZ, can_stats.rx_frames_delta);
173
174 /* check / update maximum values */
175 if (can_stats.max_tx_rate < can_stats.current_tx_rate)
176 can_stats.max_tx_rate = can_stats.current_tx_rate;
177
178 if (can_stats.max_rx_rate < can_stats.current_rx_rate)
179 can_stats.max_rx_rate = can_stats.current_rx_rate;
180
181 if (can_stats.max_rx_match_ratio < can_stats.current_rx_match_ratio)
182 can_stats.max_rx_match_ratio = can_stats.current_rx_match_ratio;
183
184 /* clear values for 'current rate' calculation */
185 can_stats.tx_frames_delta = 0;
186 can_stats.rx_frames_delta = 0;
187 can_stats.matches_delta = 0;
188
189 /* restart timer (one second) */
190 mod_timer(&can_stattimer, round_jiffies(jiffies + HZ));
191}
192
193/*
194 * proc read functions
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800195 */
196
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000197static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list,
198 struct net_device *dev)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800199{
200 struct receiver *r;
201 struct hlist_node *n;
202
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800203 hlist_for_each_entry_rcu(r, n, rx_list, list) {
204 char *fmt = (r->can_id & CAN_EFF_FLAG)?
Oliver Hartkopp12e6c412011-05-26 04:57:53 +0000205 " %-5s %08x %08x %pK %pK %8ld %s\n" :
206 " %-5s %03x %08x %pK %pK %8ld %s\n";
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800207
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000208 seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask,
Oliver Hartkopp12e6c412011-05-26 04:57:53 +0000209 r->func, r->data, r->matches, r->ident);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800210 }
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800211}
212
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000213static void can_print_recv_banner(struct seq_file *m)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800214{
215 /*
216 * can1. 00000000 00000000 00000000
217 * ....... 0 tp20
218 */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000219 seq_puts(m, " device can_id can_mask function"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800220 " userdata matches ident\n");
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800221}
222
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000223static int can_stats_proc_show(struct seq_file *m, void *v)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800224{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000225 seq_putc(m, '\n');
226 seq_printf(m, " %8ld transmitted frames (TXF)\n", can_stats.tx_frames);
227 seq_printf(m, " %8ld received frames (RXF)\n", can_stats.rx_frames);
228 seq_printf(m, " %8ld matched frames (RXMF)\n", can_stats.matches);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800229
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000230 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800231
232 if (can_stattimer.function == can_stat_update) {
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000233 seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800234 can_stats.total_rx_match_ratio);
235
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000236 seq_printf(m, " %8ld frames/s total tx rate (TXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800237 can_stats.total_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000238 seq_printf(m, " %8ld frames/s total rx rate (RXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800239 can_stats.total_rx_rate);
240
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000241 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800242
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000243 seq_printf(m, " %8ld %% current match ratio (CRXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800244 can_stats.current_rx_match_ratio);
245
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000246 seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800247 can_stats.current_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000248 seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800249 can_stats.current_rx_rate);
250
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000251 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800252
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000253 seq_printf(m, " %8ld %% max match ratio (MRXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800254 can_stats.max_rx_match_ratio);
255
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000256 seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800257 can_stats.max_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000258 seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800259 can_stats.max_rx_rate);
260
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000261 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800262 }
263
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000264 seq_printf(m, " %8ld current receive list entries (CRCV)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800265 can_pstats.rcv_entries);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000266 seq_printf(m, " %8ld maximum receive list entries (MRCV)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800267 can_pstats.rcv_entries_max);
268
269 if (can_pstats.stats_reset)
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000270 seq_printf(m, "\n %8ld statistic resets (STR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800271 can_pstats.stats_reset);
272
273 if (can_pstats.user_reset)
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000274 seq_printf(m, " %8ld user statistic resets (USTR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800275 can_pstats.user_reset);
276
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000277 seq_putc(m, '\n');
278 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800279}
280
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000281static int can_stats_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800282{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000283 return single_open(file, can_stats_proc_show, NULL);
284}
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800285
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000286static const struct file_operations can_stats_proc_fops = {
287 .owner = THIS_MODULE,
288 .open = can_stats_proc_open,
289 .read = seq_read,
290 .llseek = seq_lseek,
291 .release = single_release,
292};
293
294static int can_reset_stats_proc_show(struct seq_file *m, void *v)
295{
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800296 user_reset = 1;
297
298 if (can_stattimer.function == can_stat_update) {
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000299 seq_printf(m, "Scheduled statistic reset #%ld.\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800300 can_pstats.stats_reset + 1);
301
302 } else {
303 if (can_stats.jiffies_init != jiffies)
304 can_init_stats();
305
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000306 seq_printf(m, "Performed statistic reset #%ld.\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800307 can_pstats.stats_reset);
308 }
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000309 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800310}
311
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000312static int can_reset_stats_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800313{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000314 return single_open(file, can_reset_stats_proc_show, NULL);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800315}
316
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000317static const struct file_operations can_reset_stats_proc_fops = {
318 .owner = THIS_MODULE,
319 .open = can_reset_stats_proc_open,
320 .read = seq_read,
321 .llseek = seq_lseek,
322 .release = single_release,
323};
324
325static int can_version_proc_show(struct seq_file *m, void *v)
326{
327 seq_printf(m, "%s\n", CAN_VERSION_STRING);
328 return 0;
329}
330
331static int can_version_proc_open(struct inode *inode, struct file *file)
332{
333 return single_open(file, can_version_proc_show, NULL);
334}
335
336static const struct file_operations can_version_proc_fops = {
337 .owner = THIS_MODULE,
338 .open = can_version_proc_open,
339 .read = seq_read,
340 .llseek = seq_lseek,
341 .release = single_release,
342};
343
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000344static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx,
345 struct net_device *dev,
346 struct dev_rcv_lists *d)
347{
348 if (!hlist_empty(&d->rx[idx])) {
349 can_print_recv_banner(m);
350 can_print_rcvlist(m, &d->rx[idx], dev);
351 } else
352 seq_printf(m, " (%s: no entry)\n", DNAME(dev));
353
354}
355
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000356static int can_rcvlist_proc_show(struct seq_file *m, void *v)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800357{
358 /* double cast to prevent GCC warning */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000359 int idx = (int)(long)m->private;
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000360 struct net_device *dev;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800361 struct dev_rcv_lists *d;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800362
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000363 seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800364
365 rcu_read_lock();
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800366
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000367 /* receive list for 'all' CAN devices (dev == NULL) */
368 d = &can_rx_alldev_list;
369 can_rcvlist_proc_show_one(m, idx, NULL, d);
370
371 /* receive list for registered CAN devices */
372 for_each_netdev_rcu(&init_net, dev) {
373 if (dev->type == ARPHRD_CAN && dev->ml_priv)
374 can_rcvlist_proc_show_one(m, idx, dev, dev->ml_priv);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800375 }
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000376
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800377 rcu_read_unlock();
378
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000379 seq_putc(m, '\n');
380 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800381}
382
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000383static int can_rcvlist_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800384{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000385 return single_open(file, can_rcvlist_proc_show, PDE(inode)->data);
386}
387
388static const struct file_operations can_rcvlist_proc_fops = {
389 .owner = THIS_MODULE,
390 .open = can_rcvlist_proc_open,
391 .read = seq_read,
392 .llseek = seq_lseek,
393 .release = single_release,
394};
395
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000396static inline void can_rcvlist_sff_proc_show_one(struct seq_file *m,
397 struct net_device *dev,
398 struct dev_rcv_lists *d)
399{
400 int i;
401 int all_empty = 1;
402
403 /* check wether at least one list is non-empty */
404 for (i = 0; i < 0x800; i++)
405 if (!hlist_empty(&d->rx_sff[i])) {
406 all_empty = 0;
407 break;
408 }
409
410 if (!all_empty) {
411 can_print_recv_banner(m);
412 for (i = 0; i < 0x800; i++) {
413 if (!hlist_empty(&d->rx_sff[i]))
414 can_print_rcvlist(m, &d->rx_sff[i], dev);
415 }
416 } else
417 seq_printf(m, " (%s: no entry)\n", DNAME(dev));
418}
419
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000420static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v)
421{
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000422 struct net_device *dev;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800423 struct dev_rcv_lists *d;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800424
425 /* RX_SFF */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000426 seq_puts(m, "\nreceive list 'rx_sff':\n");
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800427
428 rcu_read_lock();
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800429
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000430 /* sff receive list for 'all' CAN devices (dev == NULL) */
431 d = &can_rx_alldev_list;
432 can_rcvlist_sff_proc_show_one(m, NULL, d);
433
434 /* sff receive list for registered CAN devices */
435 for_each_netdev_rcu(&init_net, dev) {
436 if (dev->type == ARPHRD_CAN && dev->ml_priv)
437 can_rcvlist_sff_proc_show_one(m, dev, dev->ml_priv);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800438 }
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000439
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800440 rcu_read_unlock();
441
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000442 seq_putc(m, '\n');
443 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800444}
445
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000446static int can_rcvlist_sff_proc_open(struct inode *inode, struct file *file)
447{
448 return single_open(file, can_rcvlist_sff_proc_show, NULL);
449}
450
451static const struct file_operations can_rcvlist_sff_proc_fops = {
452 .owner = THIS_MODULE,
453 .open = can_rcvlist_sff_proc_open,
454 .read = seq_read,
455 .llseek = seq_lseek,
456 .release = single_release,
457};
458
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800459/*
460 * proc utility functions
461 */
462
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800463static void can_remove_proc_readentry(const char *name)
464{
465 if (can_dir)
466 remove_proc_entry(name, can_dir);
467}
468
469/*
470 * can_init_proc - create main CAN proc directory and procfs entries
471 */
472void can_init_proc(void)
473{
474 /* create /proc/net/can directory */
475 can_dir = proc_mkdir("can", init_net.proc_net);
476
477 if (!can_dir) {
478 printk(KERN_INFO "can: failed to create /proc/net/can . "
479 "CONFIG_PROC_FS missing?\n");
480 return;
481 }
482
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800483 /* own procfs entries from the AF_CAN core */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000484 pde_version = proc_create(CAN_PROC_VERSION, 0644, can_dir,
485 &can_version_proc_fops);
486 pde_stats = proc_create(CAN_PROC_STATS, 0644, can_dir,
487 &can_stats_proc_fops);
488 pde_reset_stats = proc_create(CAN_PROC_RESET_STATS, 0644, can_dir,
489 &can_reset_stats_proc_fops);
490 pde_rcvlist_err = proc_create_data(CAN_PROC_RCVLIST_ERR, 0644, can_dir,
491 &can_rcvlist_proc_fops, (void *)RX_ERR);
492 pde_rcvlist_all = proc_create_data(CAN_PROC_RCVLIST_ALL, 0644, can_dir,
493 &can_rcvlist_proc_fops, (void *)RX_ALL);
494 pde_rcvlist_fil = proc_create_data(CAN_PROC_RCVLIST_FIL, 0644, can_dir,
495 &can_rcvlist_proc_fops, (void *)RX_FIL);
496 pde_rcvlist_inv = proc_create_data(CAN_PROC_RCVLIST_INV, 0644, can_dir,
497 &can_rcvlist_proc_fops, (void *)RX_INV);
498 pde_rcvlist_eff = proc_create_data(CAN_PROC_RCVLIST_EFF, 0644, can_dir,
499 &can_rcvlist_proc_fops, (void *)RX_EFF);
500 pde_rcvlist_sff = proc_create(CAN_PROC_RCVLIST_SFF, 0644, can_dir,
501 &can_rcvlist_sff_proc_fops);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800502}
503
504/*
505 * can_remove_proc - remove procfs entries and main CAN proc directory
506 */
507void can_remove_proc(void)
508{
509 if (pde_version)
510 can_remove_proc_readentry(CAN_PROC_VERSION);
511
512 if (pde_stats)
513 can_remove_proc_readentry(CAN_PROC_STATS);
514
515 if (pde_reset_stats)
516 can_remove_proc_readentry(CAN_PROC_RESET_STATS);
517
518 if (pde_rcvlist_err)
519 can_remove_proc_readentry(CAN_PROC_RCVLIST_ERR);
520
521 if (pde_rcvlist_all)
522 can_remove_proc_readentry(CAN_PROC_RCVLIST_ALL);
523
524 if (pde_rcvlist_fil)
525 can_remove_proc_readentry(CAN_PROC_RCVLIST_FIL);
526
527 if (pde_rcvlist_inv)
528 can_remove_proc_readentry(CAN_PROC_RCVLIST_INV);
529
530 if (pde_rcvlist_eff)
531 can_remove_proc_readentry(CAN_PROC_RCVLIST_EFF);
532
533 if (pde_rcvlist_sff)
534 can_remove_proc_readentry(CAN_PROC_RCVLIST_SFF);
535
536 if (can_dir)
537 proc_net_remove(&init_net, "can");
538}