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451d8123f8
DAN-P (Dual Attached Nodes PRP) nodes are expected to receive traditional IP packets as well as PRP (Parallel Redundancy Protocol) tagged (trailer) packets. PRP trailer is 6 bytes of PRP protocol unit called RCT, Redundancy Control Trailer (RCT) similar to HSR tag. PRP network can have traditional devices such as bridges/switches or PC attached to it and should be able to communicate. Regular Ethernet devices treat the RCT as pads. This patch adds logic to format L2 frames from network stack to add a trailer (RCT) and send it as duplicates over the slave interfaces when the protocol is PRP as per IEC 62439-3. At the ingress, it strips the trailer, do duplicate detection and rejection and forward a stripped frame up the network stack. PRP device should accept frames from Singly Attached Nodes (SAN) and thus the driver mark the link where the frame came from in the node table. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
38 lines
982 B
C
38 lines
982 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2011-2014 Autronica Fire and Security AS
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*
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* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
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*
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* include file for HSR and PRP.
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*/
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#ifndef __HSR_SLAVE_H
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#define __HSR_SLAVE_H
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include "hsr_main.h"
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int hsr_add_port(struct hsr_priv *hsr, struct net_device *dev,
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enum hsr_port_type pt, struct netlink_ext_ack *extack);
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void hsr_del_port(struct hsr_port *port);
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bool hsr_port_exists(const struct net_device *dev);
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static inline struct hsr_port *hsr_port_get_rtnl(const struct net_device *dev)
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{
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ASSERT_RTNL();
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return hsr_port_exists(dev) ?
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rtnl_dereference(dev->rx_handler_data) : NULL;
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}
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static inline struct hsr_port *hsr_port_get_rcu(const struct net_device *dev)
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{
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return hsr_port_exists(dev) ?
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rcu_dereference(dev->rx_handler_data) : NULL;
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}
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bool hsr_invalid_dan_ingress_frame(__be16 protocol);
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#endif /* __HSR_SLAVE_H */
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