f266a683a4
This patch removes the separate paths for frames coming from the outside, and frames sent from the HSR device, and instead makes all frames go through hsr_forward_skb() in hsr_forward.c. This greatly improves code readability and also opens up the possibility for future support of the HSR Interlink device that is the basis for HSR RedBoxes and HSR QuadBoxes, as well as VLAN compatibility. Other improvements: * A reduction in the number of times an skb is copied on machines without HAVE_EFFICIENT_UNALIGNED_ACCESS, which improves throughput somewhat. * Headers are now created using the standard eth_header(), and using the standard hard_header_len. * Each HSR slave now gets its own private skb, so slave-specific fields can be correctly set. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
/* Copyright 2011-2014 Autronica Fire and Security AS
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* Author(s):
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* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
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*/
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#include <linux/netdevice.h>
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#include <linux/rculist.h>
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#include <linux/timer.h>
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#include <linux/etherdevice.h>
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#include "hsr_main.h"
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#include "hsr_device.h"
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#include "hsr_netlink.h"
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#include "hsr_framereg.h"
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#include "hsr_slave.h"
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static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
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void *ptr)
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{
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struct net_device *dev;
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struct hsr_port *port, *master;
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struct hsr_priv *hsr;
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int mtu_max;
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int res;
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dev = netdev_notifier_info_to_dev(ptr);
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port = hsr_port_get_rtnl(dev);
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if (port == NULL) {
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if (!is_hsr_master(dev))
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return NOTIFY_DONE; /* Not an HSR device */
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hsr = netdev_priv(dev);
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port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
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} else {
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hsr = port->hsr;
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}
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switch (event) {
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case NETDEV_UP: /* Administrative state DOWN */
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case NETDEV_DOWN: /* Administrative state UP */
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case NETDEV_CHANGE: /* Link (carrier) state changes */
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hsr_check_carrier_and_operstate(hsr);
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break;
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case NETDEV_CHANGEADDR:
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if (port->type == HSR_PT_MASTER) {
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/* This should not happen since there's no
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* ndo_set_mac_address() for HSR devices - i.e. not
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* supported.
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*/
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break;
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}
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master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
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if (port->type == HSR_PT_SLAVE_A) {
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ether_addr_copy(master->dev->dev_addr, dev->dev_addr);
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call_netdevice_notifiers(NETDEV_CHANGEADDR, master->dev);
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}
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/* Make sure we recognize frames from ourselves in hsr_rcv() */
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port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
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res = hsr_create_self_node(&hsr->self_node_db,
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master->dev->dev_addr,
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port ?
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port->dev->dev_addr :
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master->dev->dev_addr);
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if (res)
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netdev_warn(master->dev,
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"Could not update HSR node address.\n");
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break;
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case NETDEV_CHANGEMTU:
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if (port->type == HSR_PT_MASTER)
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break; /* Handled in ndo_change_mtu() */
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mtu_max = hsr_get_max_mtu(port->hsr);
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master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER);
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master->dev->mtu = mtu_max;
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break;
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case NETDEV_UNREGISTER:
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hsr_del_port(port);
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break;
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case NETDEV_PRE_TYPE_CHANGE:
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/* HSR works only on Ethernet devices. Refuse slave to change
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* its type.
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*/
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return NOTIFY_BAD;
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}
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return NOTIFY_DONE;
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}
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struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt)
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{
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struct hsr_port *port;
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hsr_for_each_port(hsr, port)
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if (port->type == pt)
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return port;
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return NULL;
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}
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static struct notifier_block hsr_nb = {
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.notifier_call = hsr_netdev_notify, /* Slave event notifications */
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};
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static int __init hsr_init(void)
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{
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int res;
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BUILD_BUG_ON(sizeof(struct hsr_tag) != HSR_HLEN);
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register_netdevice_notifier(&hsr_nb);
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res = hsr_netlink_init();
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return res;
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}
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static void __exit hsr_exit(void)
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{
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unregister_netdevice_notifier(&hsr_nb);
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hsr_netlink_exit();
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}
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module_init(hsr_init);
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module_exit(hsr_exit);
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MODULE_LICENSE("GPL");
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