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authorPeter Heise <mail@pheise.de>2016-04-13 13:52:22 +0200
committerDavid S. Miller <davem@davemloft.net>2016-04-15 17:06:48 -0400
commitee1c27977284907d40f7f72c2d078d709f15811f (patch)
tree58c578e321dd8baad0af86ecaf41e6e2f34ddb34 /net/hsr/hsr_framereg.c
parentMerge branch 'tcp-synflood-perf' (diff)
downloadlinux-dev-ee1c27977284907d40f7f72c2d078d709f15811f.tar.xz
linux-dev-ee1c27977284907d40f7f72c2d078d709f15811f.zip
net/hsr: Added support for HSR v1
This patch adds support for the newer version 1 of the HSR networking standard. Version 0 is still default and the new version has to be selected via iproute2. Main changes are in the supervision frame handling and its ethertype field. Signed-off-by: Peter Heise <peter.heise@airbus.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/hsr/hsr_framereg.c')
-rw-r--r--net/hsr/hsr_framereg.c30
1 files changed, 19 insertions, 11 deletions
diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c
index bace124d14ef..7ea925816f79 100644
--- a/net/hsr/hsr_framereg.c
+++ b/net/hsr/hsr_framereg.c
@@ -177,17 +177,17 @@ struct hsr_node *hsr_get_node(struct list_head *node_db, struct sk_buff *skb,
return node;
}
- if (!is_sup)
- return NULL; /* Only supervision frame may create node entry */
+ /* Everyone may create a node entry, connected node to a HSR device. */
- if (ethhdr->h_proto == htons(ETH_P_PRP)) {
+ if (ethhdr->h_proto == htons(ETH_P_PRP)
+ || ethhdr->h_proto == htons(ETH_P_HSR)) {
/* Use the existing sequence_nr from the tag as starting point
* for filtering duplicate frames.
*/
seq_out = hsr_get_skb_sequence_nr(skb) - 1;
} else {
WARN_ONCE(1, "%s: Non-HSR frame\n", __func__);
- seq_out = 0;
+ seq_out = HSR_SEQNR_START;
}
return hsr_add_node(node_db, ethhdr->h_source, seq_out);
@@ -200,17 +200,25 @@ struct hsr_node *hsr_get_node(struct list_head *node_db, struct sk_buff *skb,
void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr,
struct hsr_port *port_rcv)
{
+ struct ethhdr *ethhdr;
struct hsr_node *node_real;
struct hsr_sup_payload *hsr_sp;
struct list_head *node_db;
int i;
- skb_pull(skb, sizeof(struct hsr_ethhdr_sp));
- hsr_sp = (struct hsr_sup_payload *) skb->data;
+ ethhdr = (struct ethhdr *) skb_mac_header(skb);
- if (ether_addr_equal(eth_hdr(skb)->h_source, hsr_sp->MacAddressA))
- /* Not sent from MacAddressB of a PICS_SUBS capable node */
- goto done;
+ /* Leave the ethernet header. */
+ skb_pull(skb, sizeof(struct ethhdr));
+
+ /* And leave the HSR tag. */
+ if (ethhdr->h_proto == htons(ETH_P_HSR))
+ skb_pull(skb, sizeof(struct hsr_tag));
+
+ /* And leave the HSR sup tag. */
+ skb_pull(skb, sizeof(struct hsr_sup_tag));
+
+ hsr_sp = (struct hsr_sup_payload *) skb->data;
/* Merge node_curr (registered on MacAddressB) into node_real */
node_db = &port_rcv->hsr->node_db;
@@ -225,7 +233,7 @@ void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr,
/* Node has already been merged */
goto done;
- ether_addr_copy(node_real->MacAddressB, eth_hdr(skb)->h_source);
+ ether_addr_copy(node_real->MacAddressB, ethhdr->h_source);
for (i = 0; i < HSR_PT_PORTS; i++) {
if (!node_curr->time_in_stale[i] &&
time_after(node_curr->time_in[i], node_real->time_in[i])) {
@@ -241,7 +249,7 @@ void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr,
kfree_rcu(node_curr, rcu_head);
done:
- skb_push(skb, sizeof(struct hsr_ethhdr_sp));
+ skb_push(skb, sizeof(struct hsrv1_ethhdr_sp));
}