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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - net/hsr/hsr_slave.c
1 /* Copyright 2011-2014 Autronica Fire and Security AS
3 * This program is free software; you can redistribute it and/or modify it
4 * under the terms of the GNU General Public License as published by the Free
5 * Software Foundation; either version 2 of the License, or (at your option)
9 * 2011-2014 Arvid Brodin, arvid.brodin@alten.se
12 #include "hsr_slave.h"
13 #include <linux/etherdevice.h>
14 #include <linux/if_arp.h>
16 #include "hsr_device.h"
17 #include "hsr_forward.h"
18 #include "hsr_framereg.h"
21 static rx_handler_result_t
hsr_handle_frame(struct sk_buff
**pskb
)
23 struct sk_buff
*skb
= *pskb
;
24 struct hsr_port
*port
;
27 if (!skb_mac_header_was_set(skb
)) {
28 WARN_ONCE(1, "%s: skb invalid", __func__
);
29 return RX_HANDLER_PASS
;
32 rcu_read_lock(); /* hsr->node_db, hsr->ports */
33 port
= hsr_port_get_rcu(skb
->dev
);
35 if (hsr_addr_is_self(port
->hsr
, eth_hdr(skb
)->h_source
)) {
36 /* Directly kill frames sent by ourselves */
41 protocol
= eth_hdr(skb
)->h_proto
;
42 if (protocol
!= htons(ETH_P_PRP
) && protocol
!= htons(ETH_P_HSR
))
45 skb_push(skb
, ETH_HLEN
);
47 hsr_forward_skb(skb
, port
);
50 rcu_read_unlock(); /* hsr->node_db, hsr->ports */
51 return RX_HANDLER_CONSUMED
;
54 rcu_read_unlock(); /* hsr->node_db, hsr->ports */
55 return RX_HANDLER_PASS
;
58 bool hsr_port_exists(const struct net_device
*dev
)
60 return rcu_access_pointer(dev
->rx_handler
) == hsr_handle_frame
;
64 static int hsr_check_dev_ok(struct net_device
*dev
)
66 /* Don't allow HSR on non-ethernet like devices */
67 if ((dev
->flags
& IFF_LOOPBACK
) || (dev
->type
!= ARPHRD_ETHER
) ||
68 (dev
->addr_len
!= ETH_ALEN
)) {
69 netdev_info(dev
, "Cannot use loopback or non-ethernet device as HSR slave.\n");
73 /* Don't allow enslaving hsr devices */
74 if (is_hsr_master(dev
)) {
75 netdev_info(dev
, "Cannot create trees of HSR devices.\n");
79 if (hsr_port_exists(dev
)) {
80 netdev_info(dev
, "This device is already a HSR slave.\n");
84 if (dev
->priv_flags
& IFF_802_1Q_VLAN
) {
85 netdev_info(dev
, "HSR on top of VLAN is not yet supported in this driver.\n");
89 if (dev
->priv_flags
& IFF_DONT_BRIDGE
) {
90 netdev_info(dev
, "This device does not support bridging.\n");
94 /* HSR over bonded devices has not been tested, but I'm not sure it
102 /* Setup device to be added to the HSR bridge. */
103 static int hsr_portdev_setup(struct net_device
*dev
, struct hsr_port
*port
)
108 res
= dev_set_promiscuity(dev
, 1);
110 goto fail_promiscuity
;
113 * What does net device "adjacency" mean? Should we do
114 * res = netdev_master_upper_dev_link(port->dev, port->hsr->dev); ?
117 res
= netdev_rx_handler_register(dev
, hsr_handle_frame
, port
);
119 goto fail_rx_handler
;
120 dev_disable_lro(dev
);
125 dev_set_promiscuity(dev
, -1);
132 int hsr_add_port(struct hsr_priv
*hsr
, struct net_device
*dev
,
133 enum hsr_port_type type
)
135 struct hsr_port
*port
, *master
;
138 if (type
!= HSR_PT_MASTER
) {
139 res
= hsr_check_dev_ok(dev
);
144 port
= hsr_port_get_hsr(hsr
, type
);
146 return -EBUSY
; /* This port already exists */
148 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
152 if (type
!= HSR_PT_MASTER
) {
153 res
= hsr_portdev_setup(dev
, port
);
162 list_add_tail_rcu(&port
->port_list
, &hsr
->ports
);
165 master
= hsr_port_get_hsr(hsr
, HSR_PT_MASTER
);
166 netdev_update_features(master
->dev
);
167 dev_set_mtu(master
->dev
, hsr_get_max_mtu(hsr
));
176 void hsr_del_port(struct hsr_port
*port
)
178 struct hsr_priv
*hsr
;
179 struct hsr_port
*master
;
182 master
= hsr_port_get_hsr(hsr
, HSR_PT_MASTER
);
183 list_del_rcu(&port
->port_list
);
185 if (port
!= master
) {
186 if (master
!= NULL
) {
187 netdev_update_features(master
->dev
);
188 dev_set_mtu(master
->dev
, hsr_get_max_mtu(hsr
));
190 netdev_rx_handler_unregister(port
->dev
);
191 dev_set_promiscuity(port
->dev
, -1);
195 * netdev_upper_dev_unlink(port->dev, port->hsr->dev);