[linux-2.6-block.git] / net / can / proc.c

/*
 * proc.c - procfs support for Protocol family CAN core module
 *
 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Volkswagen nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * Alternatively, provided that this notice is retained in full, this
 * software may be distributed under the terms of the GNU General
 * Public License ("GPL") version 2, in which case the provisions of the
 * GPL apply INSTEAD OF those given above.
 *
 * The provided data structures and external interfaces from this code
 * are not restricted to be used by modules with a GPL compatible license.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 */

#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/list.h>
#include <linux/rcupdate.h>
#include <linux/if_arp.h>
#include <linux/can/core.h>

#include "af_can.h"

/*
 * proc filenames for the PF_CAN core
 */

#define CAN_PROC_VERSION     "version"
#define CAN_PROC_STATS       "stats"
#define CAN_PROC_RESET_STATS "reset_stats"
#define CAN_PROC_RCVLIST_ALL "rcvlist_all"
#define CAN_PROC_RCVLIST_FIL "rcvlist_fil"
#define CAN_PROC_RCVLIST_INV "rcvlist_inv"
#define CAN_PROC_RCVLIST_SFF "rcvlist_sff"
#define CAN_PROC_RCVLIST_EFF "rcvlist_eff"
#define CAN_PROC_RCVLIST_ERR "rcvlist_err"

static int user_reset;

static const char rx_list_name[][8] = {
	[RX_ERR] = "rx_err",
	[RX_ALL] = "rx_all",
	[RX_FIL] = "rx_fil",
	[RX_INV] = "rx_inv",
};

/*
 * af_can statistics stuff
 */

static void can_init_stats(struct net *net)
{
	struct s_stats *can_stats = net->can.can_stats;
	struct s_pstats *can_pstats = net->can.can_pstats;
	/*
	 * This memset function is called from a timer context (when
	 * can_stattimer is active which is the default) OR in a process
	 * context (reading the proc_fs when can_stattimer is disabled).
	 */
	memset(can_stats, 0, sizeof(struct s_stats));
	can_stats->jiffies_init = jiffies;

	can_pstats->stats_reset++;

	if (user_reset) {
		user_reset = 0;
		can_pstats->user_reset++;
	}
}

static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
			       unsigned long count)
{
	unsigned long rate;

	if (oldjif == newjif)
		return 0;

	/* see can_stat_update() - this should NEVER happen! */
	if (count > (ULONG_MAX / HZ)) {
		printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n",
		       count);
		return 99999999;
	}

	rate = (count * HZ) / (newjif - oldjif);

	return rate;
}

void can_stat_update(struct timer_list *t)
{
	struct net *net = from_timer(net, t, can.can_stattimer);
	struct s_stats *can_stats = net->can.can_stats;
	unsigned long j = jiffies; /* snapshot */

	/* restart counting in timer context on user request */
	if (user_reset)
		can_init_stats(net);

	/* restart counting on jiffies overflow */
	if (j < can_stats->jiffies_init)
		can_init_stats(net);

	/* prevent overflow in calc_rate() */
	if (can_stats->rx_frames > (ULONG_MAX / HZ))
		can_init_stats(net);

	/* prevent overflow in calc_rate() */
	if (can_stats->tx_frames > (ULONG_MAX / HZ))
		can_init_stats(net);

	/* matches overflow - very improbable */
	if (can_stats->matches > (ULONG_MAX / 100))
		can_init_stats(net);

	/* calc total values */
	if (can_stats->rx_frames)
		can_stats->total_rx_match_ratio = (can_stats->matches * 100) /
			can_stats->rx_frames;

	can_stats->total_tx_rate = calc_rate(can_stats->jiffies_init, j,
					    can_stats->tx_frames);
	can_stats->total_rx_rate = calc_rate(can_stats->jiffies_init, j,
					    can_stats->rx_frames);

	/* calc current values */
	if (can_stats->rx_frames_delta)
		can_stats->current_rx_match_ratio =
			(can_stats->matches_delta * 100) /
			can_stats->rx_frames_delta;

	can_stats->current_tx_rate = calc_rate(0, HZ, can_stats->tx_frames_delta);
	can_stats->current_rx_rate = calc_rate(0, HZ, can_stats->rx_frames_delta);

	/* check / update maximum values */
	if (can_stats->max_tx_rate < can_stats->current_tx_rate)
		can_stats->max_tx_rate = can_stats->current_tx_rate;

	if (can_stats->max_rx_rate < can_stats->current_rx_rate)
		can_stats->max_rx_rate = can_stats->current_rx_rate;

	if (can_stats->max_rx_match_ratio < can_stats->current_rx_match_ratio)
		can_stats->max_rx_match_ratio = can_stats->current_rx_match_ratio;

	/* clear values for 'current rate' calculation */
	can_stats->tx_frames_delta = 0;
	can_stats->rx_frames_delta = 0;
	can_stats->matches_delta   = 0;

	/* restart timer (one second) */
	mod_timer(&net->can.can_stattimer, round_jiffies(jiffies + HZ));
}

/*
 * proc read functions
 */

static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list,
			      struct net_device *dev)
{
	struct receiver *r;

	hlist_for_each_entry_rcu(r, rx_list, list) {
		char *fmt = (r->can_id & CAN_EFF_FLAG)?
			"   %-5s  %08x  %08x  %pK  %pK  %8ld  %s\n" :
			"   %-5s     %03x    %08x  %pK  %pK  %8ld  %s\n";

		seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask,
				r->func, r->data, r->matches, r->ident);
	}
}

static void can_print_recv_banner(struct seq_file *m)
{
	/*
	 *                  can1.  00000000  00000000  00000000
	 *                 .......          0  tp20
	 */
	seq_puts(m, "  device   can_id   can_mask  function"
			"  userdata   matches  ident\n");
}

static int can_stats_proc_show(struct seq_file *m, void *v)
{
	struct net *net = m->private;
	struct s_stats *can_stats = net->can.can_stats;
	struct s_pstats *can_pstats = net->can.can_pstats;

	seq_putc(m, '\n');
	seq_printf(m, " %8ld transmitted frames (TXF)\n", can_stats->tx_frames);
	seq_printf(m, " %8ld received frames (RXF)\n", can_stats->rx_frames);
	seq_printf(m, " %8ld matched frames (RXMF)\n", can_stats->matches);

	seq_putc(m, '\n');

	if (net->can.can_stattimer.function == can_stat_update) {
		seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
				can_stats->total_rx_match_ratio);

		seq_printf(m, " %8ld frames/s total tx rate (TXR)\n",
				can_stats->total_tx_rate);
		seq_printf(m, " %8ld frames/s total rx rate (RXR)\n",
				can_stats->total_rx_rate);

		seq_putc(m, '\n');

		seq_printf(m, " %8ld %% current match ratio (CRXMR)\n",
				can_stats->current_rx_match_ratio);

		seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n",
				can_stats->current_tx_rate);
		seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n",
				can_stats->current_rx_rate);

		seq_putc(m, '\n');

		seq_printf(m, " %8ld %% max match ratio (MRXMR)\n",
				can_stats->max_rx_match_ratio);

		seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n",
				can_stats->max_tx_rate);
		seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n",
				can_stats->max_rx_rate);

		seq_putc(m, '\n');
	}

	seq_printf(m, " %8ld current receive list entries (CRCV)\n",
			can_pstats->rcv_entries);
	seq_printf(m, " %8ld maximum receive list entries (MRCV)\n",
			can_pstats->rcv_entries_max);

	if (can_pstats->stats_reset)
		seq_printf(m, "\n %8ld statistic resets (STR)\n",
				can_pstats->stats_reset);

	if (can_pstats->user_reset)
		seq_printf(m, " %8ld user statistic resets (USTR)\n",
				can_pstats->user_reset);

	seq_putc(m, '\n');
	return 0;
}

static int can_stats_proc_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, can_stats_proc_show);
}

static const struct file_operations can_stats_proc_fops = {
	.open		= can_stats_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static int can_reset_stats_proc_show(struct seq_file *m, void *v)
{
	struct net *net = m->private;
	struct s_pstats *can_pstats = net->can.can_pstats;
	struct s_stats *can_stats = net->can.can_stats;

	user_reset = 1;

	if (net->can.can_stattimer.function == can_stat_update) {
		seq_printf(m, "Scheduled statistic reset #%ld.\n",
				can_pstats->stats_reset + 1);
	} else {
		if (can_stats->jiffies_init != jiffies)
			can_init_stats(net);

		seq_printf(m, "Performed statistic reset #%ld.\n",
				can_pstats->stats_reset);
	}
	return 0;
}

static int can_reset_stats_proc_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, can_reset_stats_proc_show);
}

static const struct file_operations can_reset_stats_proc_fops = {
	.open		= can_reset_stats_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static int can_version_proc_show(struct seq_file *m, void *v)
{
	seq_printf(m, "%s\n", CAN_VERSION_STRING);
	return 0;
}

static int can_version_proc_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, can_version_proc_show);
}

static const struct file_operations can_version_proc_fops = {
	.open		= can_version_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx,
					     struct net_device *dev,
					     struct can_dev_rcv_lists *d)
{
	if (!hlist_empty(&d->rx[idx])) {
		can_print_recv_banner(m);
		can_print_rcvlist(m, &d->rx[idx], dev);
	} else
		seq_printf(m, "  (%s: no entry)\n", DNAME(dev));

}

static int can_rcvlist_proc_show(struct seq_file *m, void *v)
{
	/* double cast to prevent GCC warning */
	int idx = (int)(long)PDE_DATA(m->file->f_inode);
	struct net_device *dev;
	struct can_dev_rcv_lists *d;
	struct net *net = m->private;

	seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]);

	rcu_read_lock();

	/* receive list for 'all' CAN devices (dev == NULL) */
	d = net->can.can_rx_alldev_list;
	can_rcvlist_proc_show_one(m, idx, NULL, d);

	/* receive list for registered CAN devices */
	for_each_netdev_rcu(net, dev) {
		if (dev->type == ARPHRD_CAN && dev->ml_priv)
			can_rcvlist_proc_show_one(m, idx, dev, dev->ml_priv);
	}

	rcu_read_unlock();

	seq_putc(m, '\n');
	return 0;
}

static int can_rcvlist_proc_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, can_rcvlist_proc_show);
}

static const struct file_operations can_rcvlist_proc_fops = {
	.open		= can_rcvlist_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static inline void can_rcvlist_proc_show_array(struct seq_file *m,
					       struct net_device *dev,
					       struct hlist_head *rcv_array,
					       unsigned int rcv_array_sz)
{
	unsigned int i;
	int all_empty = 1;

	/* check whether at least one list is non-empty */
	for (i = 0; i < rcv_array_sz; i++)
		if (!hlist_empty(&rcv_array[i])) {
			all_empty = 0;
			break;
		}

	if (!all_empty) {
		can_print_recv_banner(m);
		for (i = 0; i < rcv_array_sz; i++) {
			if (!hlist_empty(&rcv_array[i]))
				can_print_rcvlist(m, &rcv_array[i], dev);
		}
	} else
		seq_printf(m, "  (%s: no entry)\n", DNAME(dev));
}

static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v)
{
	struct net_device *dev;
	struct can_dev_rcv_lists *d;
	struct net *net = m->private;

	/* RX_SFF */
	seq_puts(m, "\nreceive list 'rx_sff':\n");

	rcu_read_lock();

	/* sff receive list for 'all' CAN devices (dev == NULL) */
	d = net->can.can_rx_alldev_list;
	can_rcvlist_proc_show_array(m, NULL, d->rx_sff, ARRAY_SIZE(d->rx_sff));

	/* sff receive list for registered CAN devices */
	for_each_netdev_rcu(net, dev) {
		if (dev->type == ARPHRD_CAN && dev->ml_priv) {
			d = dev->ml_priv;
			can_rcvlist_proc_show_array(m, dev, d->rx_sff,
						    ARRAY_SIZE(d->rx_sff));
		}
	}

	rcu_read_unlock();

	seq_putc(m, '\n');
	return 0;
}

static int can_rcvlist_sff_proc_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, can_rcvlist_sff_proc_show);
}

static const struct file_operations can_rcvlist_sff_proc_fops = {
	.open		= can_rcvlist_sff_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};


static int can_rcvlist_eff_proc_show(struct seq_file *m, void *v)
{
	struct net_device *dev;
	struct can_dev_rcv_lists *d;
	struct net *net = m->private;

	/* RX_EFF */
	seq_puts(m, "\nreceive list 'rx_eff':\n");

	rcu_read_lock();

	/* eff receive list for 'all' CAN devices (dev == NULL) */
	d = net->can.can_rx_alldev_list;
	can_rcvlist_proc_show_array(m, NULL, d->rx_eff, ARRAY_SIZE(d->rx_eff));

	/* eff receive list for registered CAN devices */
	for_each_netdev_rcu(net, dev) {
		if (dev->type == ARPHRD_CAN && dev->ml_priv) {
			d = dev->ml_priv;
			can_rcvlist_proc_show_array(m, dev, d->rx_eff,
						    ARRAY_SIZE(d->rx_eff));
		}
	}

	rcu_read_unlock();

	seq_putc(m, '\n');
	return 0;
}

static int can_rcvlist_eff_proc_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, can_rcvlist_eff_proc_show);
}

static const struct file_operations can_rcvlist_eff_proc_fops = {
	.open		= can_rcvlist_eff_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

/*
 * can_init_proc - create main CAN proc directory and procfs entries
 */
void can_init_proc(struct net *net)
{
	/* create /proc/net/can directory */
	net->can.proc_dir = proc_net_mkdir(net, "can", net->proc_net);

	if (!net->can.proc_dir) {
		printk(KERN_INFO "can: failed to create /proc/net/can . "
			   "CONFIG_PROC_FS missing?\n");
		return;
	}

	/* own procfs entries from the AF_CAN core */
	net->can.pde_version     = proc_create(CAN_PROC_VERSION, 0644,
					       net->can.proc_dir,
					       &can_version_proc_fops);
	net->can.pde_stats       = proc_create(CAN_PROC_STATS, 0644,
					       net->can.proc_dir,
					       &can_stats_proc_fops);
	net->can.pde_reset_stats = proc_create(CAN_PROC_RESET_STATS, 0644,
					       net->can.proc_dir,
					       &can_reset_stats_proc_fops);
	net->can.pde_rcvlist_err = proc_create_data(CAN_PROC_RCVLIST_ERR, 0644,
						    net->can.proc_dir,
						    &can_rcvlist_proc_fops,
						    (void *)RX_ERR);
	net->can.pde_rcvlist_all = proc_create_data(CAN_PROC_RCVLIST_ALL, 0644,
						    net->can.proc_dir,
						    &can_rcvlist_proc_fops,
						    (void *)RX_ALL);
	net->can.pde_rcvlist_fil = proc_create_data(CAN_PROC_RCVLIST_FIL, 0644,
						    net->can.proc_dir,
						    &can_rcvlist_proc_fops,
						    (void *)RX_FIL);
	net->can.pde_rcvlist_inv = proc_create_data(CAN_PROC_RCVLIST_INV, 0644,
						    net->can.proc_dir,
						    &can_rcvlist_proc_fops,
						    (void *)RX_INV);
	net->can.pde_rcvlist_eff = proc_create(CAN_PROC_RCVLIST_EFF, 0644,
					       net->can.proc_dir,
					       &can_rcvlist_eff_proc_fops);
	net->can.pde_rcvlist_sff = proc_create(CAN_PROC_RCVLIST_SFF, 0644,
					       net->can.proc_dir,
					       &can_rcvlist_sff_proc_fops);
}

/*
 * can_remove_proc - remove procfs entries and main CAN proc directory
 */
void can_remove_proc(struct net *net)
{
	if (net->can.pde_version)
		remove_proc_entry(CAN_PROC_VERSION, net->can.proc_dir);

	if (net->can.pde_stats)
		remove_proc_entry(CAN_PROC_STATS, net->can.proc_dir);

	if (net->can.pde_reset_stats)
		remove_proc_entry(CAN_PROC_RESET_STATS, net->can.proc_dir);

	if (net->can.pde_rcvlist_err)
		remove_proc_entry(CAN_PROC_RCVLIST_ERR, net->can.proc_dir);

	if (net->can.pde_rcvlist_all)
		remove_proc_entry(CAN_PROC_RCVLIST_ALL, net->can.proc_dir);

	if (net->can.pde_rcvlist_fil)
		remove_proc_entry(CAN_PROC_RCVLIST_FIL, net->can.proc_dir);

	if (net->can.pde_rcvlist_inv)
		remove_proc_entry(CAN_PROC_RCVLIST_INV, net->can.proc_dir);

	if (net->can.pde_rcvlist_eff)
		remove_proc_entry(CAN_PROC_RCVLIST_EFF, net->can.proc_dir);

	if (net->can.pde_rcvlist_sff)
		remove_proc_entry(CAN_PROC_RCVLIST_SFF, net->can.proc_dir);

	if (net->can.proc_dir)
		remove_proc_entry("can", net->proc_net);
}
Commit	Line	Data
0d66548a OH	1	/*
	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	*
0d66548a OH	40	*/
	41
	42	#include <linux/module.h>
	43	#include <linux/proc_fs.h>
	44	#include <linux/list.h>
	45	#include <linux/rcupdate.h>
20dd3850	46	#include <linux/if_arp.h>
0d66548a OH	47	#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
0d66548a OH	65	static int user_reset;
	66
	67	static const char rx_list_name[][8] = {
	68	[RX_ERR] = "rx_err",
	69	[RX_ALL] = "rx_all",
	70	[RX_FIL] = "rx_fil",
	71	[RX_INV] = "rx_inv",
0d66548a OH	72	};
	73
	74	/*
	75	* af_can statistics stuff
	76	*/
	77
cb5635a3	78	static void can_init_stats(struct net *net)
0d66548a	79	{
cb5635a3 OH	80	struct s_stats *can_stats = net->can.can_stats;
cb5635a3 OH	81	struct s_pstats *can_pstats = net->can.can_pstats;
0d66548a OH	82	/*
	83	* This memset function is called from a timer context (when
	84	* can_stattimer is active which is the default) OR in a process
	85	* context (reading the proc_fs when can_stattimer is disabled).
	86	*/
cb5635a3 OH	87	memset(can_stats, 0, sizeof(struct s_stats));
cb5635a3 OH	88	can_stats->jiffies_init = jiffies;
0d66548a	89
cb5635a3	90	can_pstats->stats_reset++;
0d66548a OH	91
	92	if (user_reset) {
	93	user_reset = 0;
cb5635a3	94	can_pstats->user_reset++;
0d66548a OH	95	}
	96	}
	97
	98	static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
	99	unsigned long count)
	100	{
	101	unsigned long rate;
	102
	103	if (oldjif == newjif)
	104	return 0;
	105
	106	/* see can_stat_update() - this should NEVER happen! */
	107	if (count > (ULONG_MAX / HZ)) {
	108	printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n",
	109	count);
	110	return 99999999;
	111	}
	112
	113	rate = (count * HZ) / (newjif - oldjif);
	114
	115	return rate;
	116	}
	117
1fccb565	118	void can_stat_update(struct timer_list *t)
0d66548a	119	{
1fccb565	120	struct net *net = from_timer(net, t, can.can_stattimer);
cb5635a3	121	struct s_stats *can_stats = net->can.can_stats;
0d66548a OH	122	unsigned long j = jiffies; /* snapshot */
	123
	124	/* restart counting in timer context on user request */
	125	if (user_reset)
cb5635a3	126	can_init_stats(net);
0d66548a OH	127
0d66548a OH	128	/* restart counting on jiffies overflow */
cb5635a3 OH	129	if (j < can_stats->jiffies_init)
cb5635a3 OH	130	can_init_stats(net);
0d66548a OH	131
0d66548a OH	132	/* prevent overflow in calc_rate() */
cb5635a3 OH	133	if (can_stats->rx_frames > (ULONG_MAX / HZ))
cb5635a3 OH	134	can_init_stats(net);
0d66548a OH	135
0d66548a OH	136	/* prevent overflow in calc_rate() */
cb5635a3 OH	137	if (can_stats->tx_frames > (ULONG_MAX / HZ))
cb5635a3 OH	138	can_init_stats(net);
0d66548a OH	139
0d66548a OH	140	/* matches overflow - very improbable */
cb5635a3 OH	141	if (can_stats->matches > (ULONG_MAX / 100))
cb5635a3 OH	142	can_init_stats(net);
0d66548a OH	143
0d66548a OH	144	/* calc total values */
cb5635a3 OH	145	if (can_stats->rx_frames)
	146	can_stats->total_rx_match_ratio = (can_stats->matches * 100) /
	147	can_stats->rx_frames;
0d66548a	148
cb5635a3 OH	149	can_stats->total_tx_rate = calc_rate(can_stats->jiffies_init, j,
	150	can_stats->tx_frames);
	151	can_stats->total_rx_rate = calc_rate(can_stats->jiffies_init, j,
	152	can_stats->rx_frames);
0d66548a OH	153
0d66548a OH	154	/* calc current values */
cb5635a3 OH	155	if (can_stats->rx_frames_delta)
	156	can_stats->current_rx_match_ratio =
	157	(can_stats->matches_delta * 100) /
	158	can_stats->rx_frames_delta;
0d66548a	159
cb5635a3 OH	160	can_stats->current_tx_rate = calc_rate(0, HZ, can_stats->tx_frames_delta);
cb5635a3 OH	161	can_stats->current_rx_rate = calc_rate(0, HZ, can_stats->rx_frames_delta);
0d66548a OH	162
0d66548a OH	163	/* check / update maximum values */
cb5635a3 OH	164	if (can_stats->max_tx_rate < can_stats->current_tx_rate)
cb5635a3 OH	165	can_stats->max_tx_rate = can_stats->current_tx_rate;
0d66548a	166
cb5635a3 OH	167	if (can_stats->max_rx_rate < can_stats->current_rx_rate)
cb5635a3 OH	168	can_stats->max_rx_rate = can_stats->current_rx_rate;
0d66548a	169
cb5635a3 OH	170	if (can_stats->max_rx_match_ratio < can_stats->current_rx_match_ratio)
cb5635a3 OH	171	can_stats->max_rx_match_ratio = can_stats->current_rx_match_ratio;
0d66548a OH	172
0d66548a OH	173	/* clear values for 'current rate' calculation */
cb5635a3 OH	174	can_stats->tx_frames_delta = 0;
	175	can_stats->rx_frames_delta = 0;
	176	can_stats->matches_delta = 0;
0d66548a OH	177
0d66548a OH	178	/* restart timer (one second) */
cb5635a3	179	mod_timer(&net->can.can_stattimer, round_jiffies(jiffies + HZ));
0d66548a OH	180	}
	181
	182	/*
	183	* proc read functions
0d66548a OH	184	*/
0d66548a OH	185
ea00b8e2 AD	186	static void can_print_rcvlist(struct seq_file m, struct hlist_head rx_list,
ea00b8e2 AD	187	struct net_device *dev)
0d66548a OH	188	{
0d66548a OH	189	struct receiver *r;
0d66548a	190
b67bfe0d	191	hlist_for_each_entry_rcu(r, rx_list, list) {
0d66548a	192	char *fmt = (r->can_id & CAN_EFF_FLAG)?
12e6c419 OH	193	" %-5s %08x %08x %pK %pK %8ld %s\n" :
12e6c419 OH	194	" %-5s %03x %08x %pK %pK %8ld %s\n";
0d66548a	195
ea00b8e2	196	seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask,
12e6c419	197	r->func, r->data, r->matches, r->ident);
0d66548a	198	}
0d66548a OH	199	}
0d66548a OH	200
ea00b8e2	201	static void can_print_recv_banner(struct seq_file *m)
0d66548a OH	202	{
	203	/*
	204	* can1. 00000000 00000000 00000000
	205	* ....... 0 tp20
	206	*/
ea00b8e2	207	seq_puts(m, " device can_id can_mask function"
0d66548a	208	" userdata matches ident\n");
0d66548a OH	209	}
0d66548a OH	210
ea00b8e2	211	static int can_stats_proc_show(struct seq_file m, void v)
0d66548a	212	{
cb5635a3 OH	213	struct net *net = m->private;
	214	struct s_stats *can_stats = net->can.can_stats;
	215	struct s_pstats *can_pstats = net->can.can_pstats;
	216
ea00b8e2	217	seq_putc(m, '\n');
cb5635a3 OH	218	seq_printf(m, " %8ld transmitted frames (TXF)\n", can_stats->tx_frames);
	219	seq_printf(m, " %8ld received frames (RXF)\n", can_stats->rx_frames);
	220	seq_printf(m, " %8ld matched frames (RXMF)\n", can_stats->matches);
0d66548a	221
ea00b8e2	222	seq_putc(m, '\n');
0d66548a	223
841b86f3	224	if (net->can.can_stattimer.function == can_stat_update) {
ea00b8e2	225	seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
cb5635a3	226	can_stats->total_rx_match_ratio);
0d66548a	227
ea00b8e2	228	seq_printf(m, " %8ld frames/s total tx rate (TXR)\n",
cb5635a3	229	can_stats->total_tx_rate);
ea00b8e2	230	seq_printf(m, " %8ld frames/s total rx rate (RXR)\n",
cb5635a3	231	can_stats->total_rx_rate);
0d66548a	232
ea00b8e2	233	seq_putc(m, '\n');
0d66548a	234
ea00b8e2	235	seq_printf(m, " %8ld %% current match ratio (CRXMR)\n",
cb5635a3	236	can_stats->current_rx_match_ratio);
0d66548a	237
ea00b8e2	238	seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n",
cb5635a3	239	can_stats->current_tx_rate);
ea00b8e2	240	seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n",
cb5635a3	241	can_stats->current_rx_rate);
0d66548a	242
ea00b8e2	243	seq_putc(m, '\n');
0d66548a	244
ea00b8e2	245	seq_printf(m, " %8ld %% max match ratio (MRXMR)\n",
cb5635a3	246	can_stats->max_rx_match_ratio);
0d66548a	247
ea00b8e2	248	seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n",
cb5635a3	249	can_stats->max_tx_rate);
ea00b8e2	250	seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n",
cb5635a3	251	can_stats->max_rx_rate);
0d66548a	252
ea00b8e2	253	seq_putc(m, '\n');
0d66548a OH	254	}
0d66548a OH	255
ea00b8e2	256	seq_printf(m, " %8ld current receive list entries (CRCV)\n",
cb5635a3	257	can_pstats->rcv_entries);
ea00b8e2	258	seq_printf(m, " %8ld maximum receive list entries (MRCV)\n",
cb5635a3	259	can_pstats->rcv_entries_max);
0d66548a	260
cb5635a3	261	if (can_pstats->stats_reset)
ea00b8e2	262	seq_printf(m, "\n %8ld statistic resets (STR)\n",
cb5635a3	263	can_pstats->stats_reset);
0d66548a	264
cb5635a3	265	if (can_pstats->user_reset)
ea00b8e2	266	seq_printf(m, " %8ld user statistic resets (USTR)\n",
cb5635a3	267	can_pstats->user_reset);
0d66548a	268
ea00b8e2 AD	269	seq_putc(m, '\n');
ea00b8e2 AD	270	return 0;
0d66548a OH	271	}
0d66548a OH	272
ea00b8e2	273	static int can_stats_proc_open(struct inode inode, struct file file)
0d66548a	274	{
cb5635a3	275	return single_open_net(inode, file, can_stats_proc_show);
ea00b8e2 AD	276	}
	277
	278	static const struct file_operations can_stats_proc_fops = {
ea00b8e2 AD	279	.open = can_stats_proc_open,
	280	.read = seq_read,
	281	.llseek = seq_lseek,
	282	.release = single_release,
	283	};
0d66548a	284
ea00b8e2 AD	285	static int can_reset_stats_proc_show(struct seq_file m, void v)
ea00b8e2 AD	286	{
cb5635a3 OH	287	struct net *net = m->private;
	288	struct s_pstats *can_pstats = net->can.can_pstats;
	289	struct s_stats *can_stats = net->can.can_stats;
	290
0d66548a OH	291	user_reset = 1;
0d66548a OH	292
841b86f3	293	if (net->can.can_stattimer.function == can_stat_update) {
ea00b8e2	294	seq_printf(m, "Scheduled statistic reset #%ld.\n",
cb5635a3	295	can_pstats->stats_reset + 1);
0d66548a	296	} else {
cb5635a3 OH	297	if (can_stats->jiffies_init != jiffies)
cb5635a3 OH	298	can_init_stats(net);
0d66548a	299
ea00b8e2	300	seq_printf(m, "Performed statistic reset #%ld.\n",
cb5635a3	301	can_pstats->stats_reset);
0d66548a	302	}
ea00b8e2 AD	303	return 0;
ea00b8e2 AD	304	}
0d66548a	305
ea00b8e2 AD	306	static int can_reset_stats_proc_open(struct inode inode, struct file file)
ea00b8e2 AD	307	{
cb5635a3	308	return single_open_net(inode, file, can_reset_stats_proc_show);
0d66548a OH	309	}
0d66548a OH	310
ea00b8e2	311	static const struct file_operations can_reset_stats_proc_fops = {
ea00b8e2 AD	312	.open = can_reset_stats_proc_open,
	313	.read = seq_read,
	314	.llseek = seq_lseek,
	315	.release = single_release,
	316	};
	317
	318	static int can_version_proc_show(struct seq_file m, void v)
0d66548a	319	{
ea00b8e2 AD	320	seq_printf(m, "%s\n", CAN_VERSION_STRING);
	321	return 0;
	322	}
0d66548a	323
ea00b8e2 AD	324	static int can_version_proc_open(struct inode inode, struct file file)
ea00b8e2 AD	325	{
cb5635a3	326	return single_open_net(inode, file, can_version_proc_show);
0d66548a OH	327	}
0d66548a OH	328
ea00b8e2	329	static const struct file_operations can_version_proc_fops = {
ea00b8e2 AD	330	.open = can_version_proc_open,
	331	.read = seq_read,
	332	.llseek = seq_lseek,
	333	.release = single_release,
	334	};
	335
20dd3850 OH	336	static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx,
20dd3850 OH	337	struct net_device *dev,
ff847ee4	338	struct can_dev_rcv_lists *d)
20dd3850 OH	339	{
	340	if (!hlist_empty(&d->rx[idx])) {
	341	can_print_recv_banner(m);
	342	can_print_rcvlist(m, &d->rx[idx], dev);
	343	} else
	344	seq_printf(m, " (%s: no entry)\n", DNAME(dev));
	345
	346	}
	347
ea00b8e2	348	static int can_rcvlist_proc_show(struct seq_file m, void v)
0d66548a OH	349	{
0d66548a OH	350	/* double cast to prevent GCC warning */
8e8cda6d	351	int idx = (int)(long)PDE_DATA(m->file->f_inode);
20dd3850	352	struct net_device *dev;
ff847ee4	353	struct can_dev_rcv_lists *d;
8e8cda6d	354	struct net *net = m->private;
0d66548a	355
ea00b8e2	356	seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]);
0d66548a OH	357
0d66548a OH	358	rcu_read_lock();
0d66548a	359
20dd3850	360	/* receive list for 'all' CAN devices (dev == NULL) */
8e8cda6d	361	d = net->can.can_rx_alldev_list;
20dd3850 OH	362	can_rcvlist_proc_show_one(m, idx, NULL, d);
	363
	364	/* receive list for registered CAN devices */
8e8cda6d	365	for_each_netdev_rcu(net, dev) {
20dd3850 OH	366	if (dev->type == ARPHRD_CAN && dev->ml_priv)
20dd3850 OH	367	can_rcvlist_proc_show_one(m, idx, dev, dev->ml_priv);
0d66548a	368	}
20dd3850	369
0d66548a OH	370	rcu_read_unlock();
0d66548a OH	371
ea00b8e2 AD	372	seq_putc(m, '\n');
	373	return 0;
	374	}
0d66548a	375
ea00b8e2 AD	376	static int can_rcvlist_proc_open(struct inode inode, struct file file)
ea00b8e2 AD	377	{
8e8cda6d	378	return single_open_net(inode, file, can_rcvlist_proc_show);
0d66548a OH	379	}
0d66548a OH	380
ea00b8e2	381	static const struct file_operations can_rcvlist_proc_fops = {
ea00b8e2 AD	382	.open = can_rcvlist_proc_open,
	383	.read = seq_read,
	384	.llseek = seq_lseek,
	385	.release = single_release,
	386	};
	387
e3d3917f OH	388	static inline void can_rcvlist_proc_show_array(struct seq_file *m,
	389	struct net_device *dev,
	390	struct hlist_head *rcv_array,
	391	unsigned int rcv_array_sz)
20dd3850	392	{
e3d3917f	393	unsigned int i;
20dd3850 OH	394	int all_empty = 1;
20dd3850 OH	395
48fc7f7e	396	/* check whether at least one list is non-empty */
e3d3917f OH	397	for (i = 0; i < rcv_array_sz; i++)
e3d3917f OH	398	if (!hlist_empty(&rcv_array[i])) {
20dd3850 OH	399	all_empty = 0;
	400	break;
	401	}
	402
	403	if (!all_empty) {
	404	can_print_recv_banner(m);
e3d3917f OH	405	for (i = 0; i < rcv_array_sz; i++) {
	406	if (!hlist_empty(&rcv_array[i]))
	407	can_print_rcvlist(m, &rcv_array[i], dev);
20dd3850 OH	408	}
	409	} else
	410	seq_printf(m, " (%s: no entry)\n", DNAME(dev));
	411	}
	412
ea00b8e2	413	static int can_rcvlist_sff_proc_show(struct seq_file m, void v)
0d66548a	414	{
20dd3850	415	struct net_device *dev;
ff847ee4	416	struct can_dev_rcv_lists *d;
8e8cda6d	417	struct net *net = m->private;
0d66548a OH	418
0d66548a OH	419	/* RX_SFF */
ea00b8e2	420	seq_puts(m, "\nreceive list 'rx_sff':\n");
0d66548a OH	421
0d66548a OH	422	rcu_read_lock();
20dd3850 OH	423
20dd3850 OH	424	/* sff receive list for 'all' CAN devices (dev == NULL) */
8e8cda6d	425	d = net->can.can_rx_alldev_list;
e3d3917f	426	can_rcvlist_proc_show_array(m, NULL, d->rx_sff, ARRAY_SIZE(d->rx_sff));
20dd3850 OH	427
20dd3850 OH	428	/* sff receive list for registered CAN devices */
8e8cda6d	429	for_each_netdev_rcu(net, dev) {
e3d3917f OH	430	if (dev->type == ARPHRD_CAN && dev->ml_priv) {
	431	d = dev->ml_priv;
	432	can_rcvlist_proc_show_array(m, dev, d->rx_sff,
	433	ARRAY_SIZE(d->rx_sff));
	434	}
0d66548a	435	}
20dd3850	436
0d66548a OH	437	rcu_read_unlock();
0d66548a OH	438
ea00b8e2 AD	439	seq_putc(m, '\n');
	440	return 0;
	441	}
0d66548a	442
ea00b8e2 AD	443	static int can_rcvlist_sff_proc_open(struct inode inode, struct file file)
ea00b8e2 AD	444	{
8e8cda6d	445	return single_open_net(inode, file, can_rcvlist_sff_proc_show);
0d66548a OH	446	}
0d66548a OH	447
ea00b8e2	448	static const struct file_operations can_rcvlist_sff_proc_fops = {
ea00b8e2 AD	449	.open = can_rcvlist_sff_proc_open,
	450	.read = seq_read,
	451	.llseek = seq_lseek,
	452	.release = single_release,
	453	};
	454
45c70029 OH	455
	456	static int can_rcvlist_eff_proc_show(struct seq_file m, void v)
	457	{
	458	struct net_device *dev;
ff847ee4	459	struct can_dev_rcv_lists *d;
8e8cda6d	460	struct net *net = m->private;
45c70029 OH	461
	462	/* RX_EFF */
	463	seq_puts(m, "\nreceive list 'rx_eff':\n");
	464
	465	rcu_read_lock();
	466
	467	/* eff receive list for 'all' CAN devices (dev == NULL) */
8e8cda6d	468	d = net->can.can_rx_alldev_list;
45c70029 OH	469	can_rcvlist_proc_show_array(m, NULL, d->rx_eff, ARRAY_SIZE(d->rx_eff));
	470
	471	/* eff receive list for registered CAN devices */
8e8cda6d	472	for_each_netdev_rcu(net, dev) {
45c70029 OH	473	if (dev->type == ARPHRD_CAN && dev->ml_priv) {
	474	d = dev->ml_priv;
	475	can_rcvlist_proc_show_array(m, dev, d->rx_eff,
	476	ARRAY_SIZE(d->rx_eff));
	477	}
	478	}
	479
	480	rcu_read_unlock();
	481
	482	seq_putc(m, '\n');
	483	return 0;
	484	}
	485
	486	static int can_rcvlist_eff_proc_open(struct inode inode, struct file file)
	487	{
8e8cda6d	488	return single_open_net(inode, file, can_rcvlist_eff_proc_show);
45c70029 OH	489	}
	490
	491	static const struct file_operations can_rcvlist_eff_proc_fops = {
45c70029 OH	492	.open = can_rcvlist_eff_proc_open,
	493	.read = seq_read,
	494	.llseek = seq_lseek,
	495	.release = single_release,
	496	};
	497
0d66548a OH	498	/*
	499	* can_init_proc - create main CAN proc directory and procfs entries
	500	*/
8e8cda6d	501	void can_init_proc(struct net *net)
0d66548a OH	502	{
0d66548a OH	503	/* create /proc/net/can directory */
8e8cda6d	504	net->can.proc_dir = proc_net_mkdir(net, "can", net->proc_net);
0d66548a	505
8e8cda6d MK	506	if (!net->can.proc_dir) {
	507	printk(KERN_INFO "can: failed to create /proc/net/can . "
	508	"CONFIG_PROC_FS missing?\n");
0d66548a OH	509	return;
	510	}
	511
0d66548a	512	/* own procfs entries from the AF_CAN core */
8e8cda6d MK	513	net->can.pde_version = proc_create(CAN_PROC_VERSION, 0644,
	514	net->can.proc_dir,
	515	&can_version_proc_fops);
	516	net->can.pde_stats = proc_create(CAN_PROC_STATS, 0644,
	517	net->can.proc_dir,
	518	&can_stats_proc_fops);
	519	net->can.pde_reset_stats = proc_create(CAN_PROC_RESET_STATS, 0644,
	520	net->can.proc_dir,
	521	&can_reset_stats_proc_fops);
	522	net->can.pde_rcvlist_err = proc_create_data(CAN_PROC_RCVLIST_ERR, 0644,
	523	net->can.proc_dir,
	524	&can_rcvlist_proc_fops,
	525	(void *)RX_ERR);
	526	net->can.pde_rcvlist_all = proc_create_data(CAN_PROC_RCVLIST_ALL, 0644,
	527	net->can.proc_dir,
	528	&can_rcvlist_proc_fops,
	529	(void *)RX_ALL);
	530	net->can.pde_rcvlist_fil = proc_create_data(CAN_PROC_RCVLIST_FIL, 0644,
	531	net->can.proc_dir,
	532	&can_rcvlist_proc_fops,
	533	(void *)RX_FIL);
	534	net->can.pde_rcvlist_inv = proc_create_data(CAN_PROC_RCVLIST_INV, 0644,
	535	net->can.proc_dir,
	536	&can_rcvlist_proc_fops,
	537	(void *)RX_INV);
	538	net->can.pde_rcvlist_eff = proc_create(CAN_PROC_RCVLIST_EFF, 0644,
	539	net->can.proc_dir,
	540	&can_rcvlist_eff_proc_fops);
	541	net->can.pde_rcvlist_sff = proc_create(CAN_PROC_RCVLIST_SFF, 0644,
	542	net->can.proc_dir,
	543	&can_rcvlist_sff_proc_fops);
0d66548a OH	544	}
	545
	546	/*
	547	* can_remove_proc - remove procfs entries and main CAN proc directory
	548	*/
8e8cda6d	549	void can_remove_proc(struct net *net)
0d66548a	550	{
8e8cda6d MK	551	if (net->can.pde_version)
8e8cda6d MK	552	remove_proc_entry(CAN_PROC_VERSION, net->can.proc_dir);
0d66548a	553
8e8cda6d MK	554	if (net->can.pde_stats)
8e8cda6d MK	555	remove_proc_entry(CAN_PROC_STATS, net->can.proc_dir);
0d66548a	556
8e8cda6d MK	557	if (net->can.pde_reset_stats)
8e8cda6d MK	558	remove_proc_entry(CAN_PROC_RESET_STATS, net->can.proc_dir);
0d66548a	559
8e8cda6d MK	560	if (net->can.pde_rcvlist_err)
8e8cda6d MK	561	remove_proc_entry(CAN_PROC_RCVLIST_ERR, net->can.proc_dir);
0d66548a	562
8e8cda6d MK	563	if (net->can.pde_rcvlist_all)
8e8cda6d MK	564	remove_proc_entry(CAN_PROC_RCVLIST_ALL, net->can.proc_dir);
0d66548a	565
8e8cda6d MK	566	if (net->can.pde_rcvlist_fil)
8e8cda6d MK	567	remove_proc_entry(CAN_PROC_RCVLIST_FIL, net->can.proc_dir);
0d66548a	568
8e8cda6d MK	569	if (net->can.pde_rcvlist_inv)
8e8cda6d MK	570	remove_proc_entry(CAN_PROC_RCVLIST_INV, net->can.proc_dir);
0d66548a	571
8e8cda6d MK	572	if (net->can.pde_rcvlist_eff)
8e8cda6d MK	573	remove_proc_entry(CAN_PROC_RCVLIST_EFF, net->can.proc_dir);
0d66548a	574
8e8cda6d MK	575	if (net->can.pde_rcvlist_sff)
8e8cda6d MK	576	remove_proc_entry(CAN_PROC_RCVLIST_SFF, net->can.proc_dir);
0d66548a	577
8e8cda6d MK	578	if (net->can.proc_dir)
8e8cda6d MK	579	remove_proc_entry("can", net->proc_net);
0d66548a	580	}