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ffd956eef6
This patch introduces the CAN midlayer private structure ("struct
can_ml_priv") which should be used to hold protocol specific per device
data structures. For now it's only member is "struct can_dev_rcv_lists".
The CAN midlayer private is allocated via alloc_netdev()'s private and
assigned to "struct net_device::ml_priv" during device creation. This is
done transparently for CAN drivers using alloc_candev(). The slcan, vcan
and vxcan drivers which are not using alloc_candev() have been adopted
manually. The memory layout of the netdev_priv allocated via
alloc_candev() will looke like this:
+-------------------------+
| driver's priv |
+-------------------------+
| struct can_ml_priv |
+-------------------------+
| array of struct sk_buff |
+-------------------------+
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
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/* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Volkswagen nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* Alternatively, provided that this notice is retained in full, this
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* software may be distributed under the terms of the GNU General
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* Public License ("GPL") version 2, in which case the provisions of the
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* GPL apply INSTEAD OF those given above.
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*
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* The provided data structures and external interfaces from this code
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* are not restricted to be used by modules with a GPL compatible license.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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*/
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#ifndef AF_CAN_H
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#define AF_CAN_H
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/list.h>
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#include <linux/rcupdate.h>
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#include <linux/can.h>
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/* af_can rx dispatcher structures */
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struct receiver {
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struct hlist_node list;
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canid_t can_id;
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canid_t mask;
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unsigned long matches;
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void (*func)(struct sk_buff *skb, void *data);
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void *data;
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char *ident;
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struct sock *sk;
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struct rcu_head rcu;
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};
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/* statistic structures */
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/* can be reset e.g. by can_init_stats() */
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struct can_pkg_stats {
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unsigned long jiffies_init;
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unsigned long rx_frames;
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unsigned long tx_frames;
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unsigned long matches;
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unsigned long total_rx_rate;
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unsigned long total_tx_rate;
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unsigned long total_rx_match_ratio;
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unsigned long current_rx_rate;
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unsigned long current_tx_rate;
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unsigned long current_rx_match_ratio;
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unsigned long max_rx_rate;
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unsigned long max_tx_rate;
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unsigned long max_rx_match_ratio;
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unsigned long rx_frames_delta;
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unsigned long tx_frames_delta;
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unsigned long matches_delta;
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};
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/* persistent statistics */
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struct can_rcv_lists_stats {
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unsigned long stats_reset;
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unsigned long user_reset;
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unsigned long rcv_entries;
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unsigned long rcv_entries_max;
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};
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/* function prototypes for the CAN networklayer procfs (proc.c) */
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void can_init_proc(struct net *net);
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void can_remove_proc(struct net *net);
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void can_stat_update(struct timer_list *t);
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#endif /* AF_CAN_H */
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