blob: f4265cc9c3fbee335f16f467ac7f0a197e43977c [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 *
40 * Send feedback to <socketcan-users@lists.berlios.de>
41 *
42 */
43
44#include <linux/module.h>
45#include <linux/proc_fs.h>
46#include <linux/list.h>
47#include <linux/rcupdate.h>
Oliver Hartkopp20dd3852009-12-25 06:47:47 +000048#include <linux/if_arp.h>
Oliver Hartkopp0d665482007-11-16 15:52:17 -080049#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
67static struct proc_dir_entry *can_dir;
68static struct proc_dir_entry *pde_version;
69static struct proc_dir_entry *pde_stats;
70static struct proc_dir_entry *pde_reset_stats;
71static struct proc_dir_entry *pde_rcvlist_all;
72static struct proc_dir_entry *pde_rcvlist_fil;
73static struct proc_dir_entry *pde_rcvlist_inv;
74static struct proc_dir_entry *pde_rcvlist_sff;
75static struct proc_dir_entry *pde_rcvlist_eff;
76static struct proc_dir_entry *pde_rcvlist_err;
77
78static int user_reset;
79
80static const char rx_list_name[][8] = {
81 [RX_ERR] = "rx_err",
82 [RX_ALL] = "rx_all",
83 [RX_FIL] = "rx_fil",
84 [RX_INV] = "rx_inv",
85 [RX_EFF] = "rx_eff",
86};
87
Oliver Hartkopp20dd3852009-12-25 06:47:47 +000088/* receive filters subscribed for 'all' CAN devices */
89extern struct dev_rcv_lists can_rx_alldev_list;
90
Oliver Hartkopp0d665482007-11-16 15:52:17 -080091/*
92 * af_can statistics stuff
93 */
94
95static void can_init_stats(void)
96{
97 /*
98 * This memset function is called from a timer context (when
99 * can_stattimer is active which is the default) OR in a process
100 * context (reading the proc_fs when can_stattimer is disabled).
101 */
102 memset(&can_stats, 0, sizeof(can_stats));
103 can_stats.jiffies_init = jiffies;
104
105 can_pstats.stats_reset++;
106
107 if (user_reset) {
108 user_reset = 0;
109 can_pstats.user_reset++;
110 }
111}
112
113static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
114 unsigned long count)
115{
116 unsigned long rate;
117
118 if (oldjif == newjif)
119 return 0;
120
121 /* see can_stat_update() - this should NEVER happen! */
122 if (count > (ULONG_MAX / HZ)) {
123 printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n",
124 count);
125 return 99999999;
126 }
127
128 rate = (count * HZ) / (newjif - oldjif);
129
130 return rate;
131}
132
133void can_stat_update(unsigned long data)
134{
135 unsigned long j = jiffies; /* snapshot */
136
137 /* restart counting in timer context on user request */
138 if (user_reset)
139 can_init_stats();
140
141 /* restart counting on jiffies overflow */
142 if (j < can_stats.jiffies_init)
143 can_init_stats();
144
145 /* prevent overflow in calc_rate() */
146 if (can_stats.rx_frames > (ULONG_MAX / HZ))
147 can_init_stats();
148
149 /* prevent overflow in calc_rate() */
150 if (can_stats.tx_frames > (ULONG_MAX / HZ))
151 can_init_stats();
152
153 /* matches overflow - very improbable */
154 if (can_stats.matches > (ULONG_MAX / 100))
155 can_init_stats();
156
157 /* calc total values */
158 if (can_stats.rx_frames)
159 can_stats.total_rx_match_ratio = (can_stats.matches * 100) /
160 can_stats.rx_frames;
161
162 can_stats.total_tx_rate = calc_rate(can_stats.jiffies_init, j,
163 can_stats.tx_frames);
164 can_stats.total_rx_rate = calc_rate(can_stats.jiffies_init, j,
165 can_stats.rx_frames);
166
167 /* calc current values */
168 if (can_stats.rx_frames_delta)
169 can_stats.current_rx_match_ratio =
170 (can_stats.matches_delta * 100) /
171 can_stats.rx_frames_delta;
172
173 can_stats.current_tx_rate = calc_rate(0, HZ, can_stats.tx_frames_delta);
174 can_stats.current_rx_rate = calc_rate(0, HZ, can_stats.rx_frames_delta);
175
176 /* check / update maximum values */
177 if (can_stats.max_tx_rate < can_stats.current_tx_rate)
178 can_stats.max_tx_rate = can_stats.current_tx_rate;
179
180 if (can_stats.max_rx_rate < can_stats.current_rx_rate)
181 can_stats.max_rx_rate = can_stats.current_rx_rate;
182
183 if (can_stats.max_rx_match_ratio < can_stats.current_rx_match_ratio)
184 can_stats.max_rx_match_ratio = can_stats.current_rx_match_ratio;
185
186 /* clear values for 'current rate' calculation */
187 can_stats.tx_frames_delta = 0;
188 can_stats.rx_frames_delta = 0;
189 can_stats.matches_delta = 0;
190
191 /* restart timer (one second) */
192 mod_timer(&can_stattimer, round_jiffies(jiffies + HZ));
193}
194
195/*
196 * proc read functions
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800197 */
198
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000199static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list,
200 struct net_device *dev)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800201{
202 struct receiver *r;
203 struct hlist_node *n;
204
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800205 hlist_for_each_entry_rcu(r, n, rx_list, list) {
206 char *fmt = (r->can_id & CAN_EFF_FLAG)?
207 " %-5s %08X %08x %08x %08x %8ld %s\n" :
208 " %-5s %03X %08x %08lx %08lx %8ld %s\n";
209
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000210 seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask,
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800211 (unsigned long)r->func, (unsigned long)r->data,
212 r->matches, r->ident);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800213 }
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800214}
215
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000216static void can_print_recv_banner(struct seq_file *m)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800217{
218 /*
219 * can1. 00000000 00000000 00000000
220 * ....... 0 tp20
221 */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000222 seq_puts(m, " device can_id can_mask function"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800223 " userdata matches ident\n");
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800224}
225
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000226static int can_stats_proc_show(struct seq_file *m, void *v)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800227{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000228 seq_putc(m, '\n');
229 seq_printf(m, " %8ld transmitted frames (TXF)\n", can_stats.tx_frames);
230 seq_printf(m, " %8ld received frames (RXF)\n", can_stats.rx_frames);
231 seq_printf(m, " %8ld matched frames (RXMF)\n", can_stats.matches);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800232
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000233 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800234
235 if (can_stattimer.function == can_stat_update) {
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000236 seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800237 can_stats.total_rx_match_ratio);
238
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000239 seq_printf(m, " %8ld frames/s total tx rate (TXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800240 can_stats.total_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000241 seq_printf(m, " %8ld frames/s total rx rate (RXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800242 can_stats.total_rx_rate);
243
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000244 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800245
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000246 seq_printf(m, " %8ld %% current match ratio (CRXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800247 can_stats.current_rx_match_ratio);
248
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000249 seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800250 can_stats.current_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000251 seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800252 can_stats.current_rx_rate);
253
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000254 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800255
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000256 seq_printf(m, " %8ld %% max match ratio (MRXMR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800257 can_stats.max_rx_match_ratio);
258
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000259 seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800260 can_stats.max_tx_rate);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000261 seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800262 can_stats.max_rx_rate);
263
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000264 seq_putc(m, '\n');
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800265 }
266
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000267 seq_printf(m, " %8ld current receive list entries (CRCV)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800268 can_pstats.rcv_entries);
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000269 seq_printf(m, " %8ld maximum receive list entries (MRCV)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800270 can_pstats.rcv_entries_max);
271
272 if (can_pstats.stats_reset)
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000273 seq_printf(m, "\n %8ld statistic resets (STR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800274 can_pstats.stats_reset);
275
276 if (can_pstats.user_reset)
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000277 seq_printf(m, " %8ld user statistic resets (USTR)\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800278 can_pstats.user_reset);
279
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000280 seq_putc(m, '\n');
281 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800282}
283
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000284static int can_stats_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800285{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000286 return single_open(file, can_stats_proc_show, NULL);
287}
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800288
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000289static const struct file_operations can_stats_proc_fops = {
290 .owner = THIS_MODULE,
291 .open = can_stats_proc_open,
292 .read = seq_read,
293 .llseek = seq_lseek,
294 .release = single_release,
295};
296
297static int can_reset_stats_proc_show(struct seq_file *m, void *v)
298{
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800299 user_reset = 1;
300
301 if (can_stattimer.function == can_stat_update) {
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000302 seq_printf(m, "Scheduled statistic reset #%ld.\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800303 can_pstats.stats_reset + 1);
304
305 } else {
306 if (can_stats.jiffies_init != jiffies)
307 can_init_stats();
308
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000309 seq_printf(m, "Performed statistic reset #%ld.\n",
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800310 can_pstats.stats_reset);
311 }
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000312 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800313}
314
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000315static int can_reset_stats_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800316{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000317 return single_open(file, can_reset_stats_proc_show, NULL);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800318}
319
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000320static const struct file_operations can_reset_stats_proc_fops = {
321 .owner = THIS_MODULE,
322 .open = can_reset_stats_proc_open,
323 .read = seq_read,
324 .llseek = seq_lseek,
325 .release = single_release,
326};
327
328static int can_version_proc_show(struct seq_file *m, void *v)
329{
330 seq_printf(m, "%s\n", CAN_VERSION_STRING);
331 return 0;
332}
333
334static int can_version_proc_open(struct inode *inode, struct file *file)
335{
336 return single_open(file, can_version_proc_show, NULL);
337}
338
339static const struct file_operations can_version_proc_fops = {
340 .owner = THIS_MODULE,
341 .open = can_version_proc_open,
342 .read = seq_read,
343 .llseek = seq_lseek,
344 .release = single_release,
345};
346
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000347static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx,
348 struct net_device *dev,
349 struct dev_rcv_lists *d)
350{
351 if (!hlist_empty(&d->rx[idx])) {
352 can_print_recv_banner(m);
353 can_print_rcvlist(m, &d->rx[idx], dev);
354 } else
355 seq_printf(m, " (%s: no entry)\n", DNAME(dev));
356
357}
358
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000359static int can_rcvlist_proc_show(struct seq_file *m, void *v)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800360{
361 /* double cast to prevent GCC warning */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000362 int idx = (int)(long)m->private;
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000363 struct net_device *dev;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800364 struct dev_rcv_lists *d;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800365
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000366 seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800367
368 rcu_read_lock();
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800369
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000370 /* receive list for 'all' CAN devices (dev == NULL) */
371 d = &can_rx_alldev_list;
372 can_rcvlist_proc_show_one(m, idx, NULL, d);
373
374 /* receive list for registered CAN devices */
375 for_each_netdev_rcu(&init_net, dev) {
376 if (dev->type == ARPHRD_CAN && dev->ml_priv)
377 can_rcvlist_proc_show_one(m, idx, dev, dev->ml_priv);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800378 }
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000379
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800380 rcu_read_unlock();
381
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000382 seq_putc(m, '\n');
383 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800384}
385
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000386static int can_rcvlist_proc_open(struct inode *inode, struct file *file)
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800387{
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000388 return single_open(file, can_rcvlist_proc_show, PDE(inode)->data);
389}
390
391static const struct file_operations can_rcvlist_proc_fops = {
392 .owner = THIS_MODULE,
393 .open = can_rcvlist_proc_open,
394 .read = seq_read,
395 .llseek = seq_lseek,
396 .release = single_release,
397};
398
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000399static inline void can_rcvlist_sff_proc_show_one(struct seq_file *m,
400 struct net_device *dev,
401 struct dev_rcv_lists *d)
402{
403 int i;
404 int all_empty = 1;
405
406 /* check wether at least one list is non-empty */
407 for (i = 0; i < 0x800; i++)
408 if (!hlist_empty(&d->rx_sff[i])) {
409 all_empty = 0;
410 break;
411 }
412
413 if (!all_empty) {
414 can_print_recv_banner(m);
415 for (i = 0; i < 0x800; i++) {
416 if (!hlist_empty(&d->rx_sff[i]))
417 can_print_rcvlist(m, &d->rx_sff[i], dev);
418 }
419 } else
420 seq_printf(m, " (%s: no entry)\n", DNAME(dev));
421}
422
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000423static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v)
424{
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000425 struct net_device *dev;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800426 struct dev_rcv_lists *d;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800427
428 /* RX_SFF */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000429 seq_puts(m, "\nreceive list 'rx_sff':\n");
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800430
431 rcu_read_lock();
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800432
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000433 /* sff receive list for 'all' CAN devices (dev == NULL) */
434 d = &can_rx_alldev_list;
435 can_rcvlist_sff_proc_show_one(m, NULL, d);
436
437 /* sff receive list for registered CAN devices */
438 for_each_netdev_rcu(&init_net, dev) {
439 if (dev->type == ARPHRD_CAN && dev->ml_priv)
440 can_rcvlist_sff_proc_show_one(m, dev, dev->ml_priv);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800441 }
Oliver Hartkopp20dd3852009-12-25 06:47:47 +0000442
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800443 rcu_read_unlock();
444
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000445 seq_putc(m, '\n');
446 return 0;
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800447}
448
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000449static int can_rcvlist_sff_proc_open(struct inode *inode, struct file *file)
450{
451 return single_open(file, can_rcvlist_sff_proc_show, NULL);
452}
453
454static const struct file_operations can_rcvlist_sff_proc_fops = {
455 .owner = THIS_MODULE,
456 .open = can_rcvlist_sff_proc_open,
457 .read = seq_read,
458 .llseek = seq_lseek,
459 .release = single_release,
460};
461
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800462/*
463 * proc utility functions
464 */
465
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800466static void can_remove_proc_readentry(const char *name)
467{
468 if (can_dir)
469 remove_proc_entry(name, can_dir);
470}
471
472/*
473 * can_init_proc - create main CAN proc directory and procfs entries
474 */
475void can_init_proc(void)
476{
477 /* create /proc/net/can directory */
478 can_dir = proc_mkdir("can", init_net.proc_net);
479
480 if (!can_dir) {
481 printk(KERN_INFO "can: failed to create /proc/net/can . "
482 "CONFIG_PROC_FS missing?\n");
483 return;
484 }
485
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800486 /* own procfs entries from the AF_CAN core */
Alexey Dobriyanea00b8e2009-08-28 09:57:21 +0000487 pde_version = proc_create(CAN_PROC_VERSION, 0644, can_dir,
488 &can_version_proc_fops);
489 pde_stats = proc_create(CAN_PROC_STATS, 0644, can_dir,
490 &can_stats_proc_fops);
491 pde_reset_stats = proc_create(CAN_PROC_RESET_STATS, 0644, can_dir,
492 &can_reset_stats_proc_fops);
493 pde_rcvlist_err = proc_create_data(CAN_PROC_RCVLIST_ERR, 0644, can_dir,
494 &can_rcvlist_proc_fops, (void *)RX_ERR);
495 pde_rcvlist_all = proc_create_data(CAN_PROC_RCVLIST_ALL, 0644, can_dir,
496 &can_rcvlist_proc_fops, (void *)RX_ALL);
497 pde_rcvlist_fil = proc_create_data(CAN_PROC_RCVLIST_FIL, 0644, can_dir,
498 &can_rcvlist_proc_fops, (void *)RX_FIL);
499 pde_rcvlist_inv = proc_create_data(CAN_PROC_RCVLIST_INV, 0644, can_dir,
500 &can_rcvlist_proc_fops, (void *)RX_INV);
501 pde_rcvlist_eff = proc_create_data(CAN_PROC_RCVLIST_EFF, 0644, can_dir,
502 &can_rcvlist_proc_fops, (void *)RX_EFF);
503 pde_rcvlist_sff = proc_create(CAN_PROC_RCVLIST_SFF, 0644, can_dir,
504 &can_rcvlist_sff_proc_fops);
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800505}
506
507/*
508 * can_remove_proc - remove procfs entries and main CAN proc directory
509 */
510void can_remove_proc(void)
511{
512 if (pde_version)
513 can_remove_proc_readentry(CAN_PROC_VERSION);
514
515 if (pde_stats)
516 can_remove_proc_readentry(CAN_PROC_STATS);
517
518 if (pde_reset_stats)
519 can_remove_proc_readentry(CAN_PROC_RESET_STATS);
520
521 if (pde_rcvlist_err)
522 can_remove_proc_readentry(CAN_PROC_RCVLIST_ERR);
523
524 if (pde_rcvlist_all)
525 can_remove_proc_readentry(CAN_PROC_RCVLIST_ALL);
526
527 if (pde_rcvlist_fil)
528 can_remove_proc_readentry(CAN_PROC_RCVLIST_FIL);
529
530 if (pde_rcvlist_inv)
531 can_remove_proc_readentry(CAN_PROC_RCVLIST_INV);
532
533 if (pde_rcvlist_eff)
534 can_remove_proc_readentry(CAN_PROC_RCVLIST_EFF);
535
536 if (pde_rcvlist_sff)
537 can_remove_proc_readentry(CAN_PROC_RCVLIST_SFF);
538
539 if (can_dir)
540 proc_net_remove(&init_net, "can");
541}