From ffd956eef69b212a724b1cc4cdc61828f3ad9104 Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Mon, 8 Oct 2018 09:02:38 +0200
Subject: can: introduce CAN midlayer private and allocate it automatically

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>
---
 net/can/af_can.c |  1 +
 net/can/af_can.h | 15 ---------------
 net/can/proc.c   |  1 +
 3 files changed, 2 insertions(+), 15 deletions(-)

(limited to 'net/can')

diff --git a/net/can/af_can.c b/net/can/af_can.c
index d65b19003a24..723299daa04e 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -58,6 +58,7 @@
 #include <linux/can.h>
 #include <linux/can/core.h>
 #include <linux/can/skb.h>
+#include <linux/can/can-ml.h>
 #include <linux/ratelimit.h>
 #include <net/net_namespace.h>
 #include <net/sock.h>
diff --git a/net/can/af_can.h b/net/can/af_can.h
index 25d22e534506..7c2d9161e224 100644
--- a/net/can/af_can.h
+++ b/net/can/af_can.h
@@ -60,21 +60,6 @@ struct receiver {
 	struct rcu_head rcu;
 };
 
-#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 can_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() */
diff --git a/net/can/proc.c b/net/can/proc.c
index 560fa3c132bf..e6881bfc3ed1 100644
--- a/net/can/proc.c
+++ b/net/can/proc.c
@@ -45,6 +45,7 @@
 #include <linux/list.h>
 #include <linux/rcupdate.h>
 #include <linux/if_arp.h>
+#include <linux/can/can-ml.h>
 #include <linux/can/core.h>
 
 #include "af_can.h"
-- 
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