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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /net/can/af_can.h
Initial import
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diff --git a/net/can/af_can.h b/net/can/af_can.h
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+/*
+ * 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.
+ *
+ */
+
+#ifndef AF_CAN_H
+#define AF_CAN_H
+
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/list.h>
+#include <linux/rcupdate.h>
+#include <linux/can.h>
+
+/* af_can rx dispatcher structures */
+
+struct receiver {
+ struct hlist_node list;
+ struct rcu_head rcu;
+ canid_t can_id;
+ canid_t mask;
+ unsigned long matches;
+ void (*func)(struct sk_buff *, void *);
+ void *data;
+ char *ident;
+};
+
+#define CAN_SFF_RCV_ARRAY_SZ (1 << CAN_SFF_ID_BITS)
+#define CAN_EFF_RCV_HASH_BITS 10
+#define CAN_EFF_RCV_ARRAY_SZ (1 << CAN_EFF_RCV_HASH_BITS)
+
+enum { RX_ERR, RX_ALL, RX_FIL, RX_INV, RX_MAX };
+
+/* per device receive filters linked at dev->ml_priv */
+struct dev_rcv_lists {
+ struct hlist_head rx[RX_MAX];
+ struct hlist_head rx_sff[CAN_SFF_RCV_ARRAY_SZ];
+ struct hlist_head rx_eff[CAN_EFF_RCV_ARRAY_SZ];
+ int remove_on_zero_entries;
+ int entries;
+};
+
+/* statistic structures */
+
+/* can be reset e.g. by can_init_stats() */
+struct s_stats {
+ unsigned long jiffies_init;
+
+ unsigned long rx_frames;
+ unsigned long tx_frames;
+ unsigned long matches;
+
+ unsigned long total_rx_rate;
+ unsigned long total_tx_rate;
+ unsigned long total_rx_match_ratio;
+
+ unsigned long current_rx_rate;
+ unsigned long current_tx_rate;
+ unsigned long current_rx_match_ratio;
+
+ unsigned long max_rx_rate;
+ unsigned long max_tx_rate;
+ unsigned long max_rx_match_ratio;
+
+ unsigned long rx_frames_delta;
+ unsigned long tx_frames_delta;
+ unsigned long matches_delta;
+};
+
+/* persistent statistics */
+struct s_pstats {
+ unsigned long stats_reset;
+ unsigned long user_reset;
+ unsigned long rcv_entries;
+ unsigned long rcv_entries_max;
+};
+
+/* receive filters subscribed for 'all' CAN devices */
+extern struct dev_rcv_lists can_rx_alldev_list;
+
+/* function prototypes for the CAN networklayer procfs (proc.c) */
+void can_init_proc(void);
+void can_remove_proc(void);
+void can_stat_update(unsigned long data);
+
+/* structures and variables from af_can.c needed in proc.c for reading */
+extern struct timer_list can_stattimer; /* timer for statistics update */
+extern struct s_stats can_stats; /* packet statistics */
+extern struct s_pstats can_pstats; /* receive list statistics */
+extern struct hlist_head can_rx_dev_list; /* rx dispatcher structures */
+
+#endif /* AF_CAN_H */