1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright 2011-2014 Autronica Fire and Security AS
5  *	2011-2014 Arvid Brodin, arvid.brodin@alten.se
7  * Frame handler other utility functions for HSR and PRP.
32 	if (unlikely(skb->pkt_type == PACKET_LOOPBACK))  in hsr_handle_frame()
40 	port = hsr_port_get_rcu(skb->dev);  in hsr_handle_frame()
43 	hsr = port->hsr;  in hsr_handle_frame()
45 	if (hsr_addr_is_self(port->hsr, eth_hdr(skb)->h_source)) {  in hsr_handle_frame()
55 	protocol = eth_hdr(skb)->h_proto;  in hsr_handle_frame()
57 	if (!(port->dev->features & NETIF_F_HW_HSR_TAG_RM) &&  in hsr_handle_frame()
58 	    hsr->proto_ops->invalid_dan_ingress_frame &&  in hsr_handle_frame()
59 	    hsr->proto_ops->invalid_dan_ingress_frame(protocol))  in hsr_handle_frame()
64 	if ((!hsr->prot_version && protocol == htons(ETH_P_PRP)) ||  in hsr_handle_frame()
80 	return rcu_access_pointer(dev->rx_handler) == hsr_handle_frame;  in hsr_port_exists()
86 	/* Don't allow HSR on non-ethernet like devices */  in hsr_check_dev_ok()
87 	if ((dev->flags & IFF_LOOPBACK) || dev->type != ARPHRD_ETHER ||  in hsr_check_dev_ok()
88 	    dev->addr_len != ETH_ALEN) {  in hsr_check_dev_ok()
89 		NL_SET_ERR_MSG_MOD(extack, "Cannot use loopback or non-ethernet device as HSR slave.");  in hsr_check_dev_ok()
90 		return -EINVAL;  in hsr_check_dev_ok()
97 		return -EINVAL;  in hsr_check_dev_ok()
103 		return -EINVAL;  in hsr_check_dev_ok()
108 		return -EINVAL;  in hsr_check_dev_ok()
111 	if (dev->priv_flags & IFF_DONT_BRIDGE) {  in hsr_check_dev_ok()
114 		return -EOPNOTSUPP;  in hsr_check_dev_ok()
131 	struct hsr_port *master;  in hsr_portdev_setup()  local
134 	/* Don't use promiscuous mode for offload since L2 frame forward  in hsr_portdev_setup()
137 	if (!port->hsr->fwd_offloaded) {  in hsr_portdev_setup()
143 	master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);  in hsr_portdev_setup()
144 	hsr_dev = master->dev;  in hsr_portdev_setup()
160 	if (!port->hsr->fwd_offloaded)  in hsr_portdev_setup()
161 		dev_set_promiscuity(dev, -1);  in hsr_portdev_setup()
169 	struct hsr_port *port, *master;  in hsr_add_port()  local
180 		return -EBUSY;	/* This port already exists */  in hsr_add_port()
184 		return -ENOMEM;  in hsr_add_port()
186 	port->hsr = hsr;  in hsr_add_port()
187 	port->dev = dev;  in hsr_add_port()
188 	port->type = type;  in hsr_add_port()
196 	list_add_tail_rcu(&port->port_list, &hsr->ports);  in hsr_add_port()
199 	master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);  in hsr_add_port()
200 	netdev_update_features(master->dev);  in hsr_add_port()
201 	dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));  in hsr_add_port()
213 	struct hsr_port *master;  in hsr_del_port()  local
215 	hsr = port->hsr;  in hsr_del_port()
216 	master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);  in hsr_del_port()
217 	list_del_rcu(&port->port_list);  in hsr_del_port()
219 	if (port != master) {  in hsr_del_port()
220 		netdev_update_features(master->dev);  in hsr_del_port()
221 		dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));  in hsr_del_port()
222 		netdev_rx_handler_unregister(port->dev);  in hsr_del_port()
223 		if (!port->hsr->fwd_offloaded)  in hsr_del_port()
224 			dev_set_promiscuity(port->dev, -1);  in hsr_del_port()
225 		netdev_upper_dev_unlink(port->dev, master->dev);  in hsr_del_port()