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| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2020-09-26 22:32:14 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-26 14:17:59 -0700 |
| commit | e665297983f140f3a80d5de84aed4897cdc94cd1 (patch) | |
| tree | 1144db1cc5e03c2350745b3c7d3c3ef6a531c03f /net/dsa | |
| parent | 6b04f171dcbd6932019eafbb08c8faecde8b048d (diff) | |
| download | linux-e665297983f140f3a80d5de84aed4897cdc94cd1.tar.bz2 | |
net: dsa: tag_sja1105: use a custom flow dissector procedure
The sja1105 is a bit of a special snowflake, in that not all frames are
transmitted/received in the same way. L2 link-local frames are received
with the source port/switch ID information put in the destination MAC
address. For the rest, a tag_8021q header is used. So only the latter
frames displace the rest of the headers and need to use the generic flow
dissector procedure.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
| -rw-r--r-- | net/dsa/tag_sja1105.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c index 36ebd5878061..50496013cdb7 100644 --- a/net/dsa/tag_sja1105.c +++ b/net/dsa/tag_sja1105.c @@ -346,6 +346,16 @@ static struct sk_buff *sja1105_rcv(struct sk_buff *skb, is_meta); } +static void sja1105_flow_dissect(const struct sk_buff *skb, __be16 *proto, + int *offset) +{ + /* No tag added for management frames, all ok */ + if (unlikely(sja1105_is_link_local(skb))) + return; + + dsa_tag_generic_flow_dissect(skb, proto, offset); +} + static const struct dsa_device_ops sja1105_netdev_ops = { .name = "sja1105", .proto = DSA_TAG_PROTO_SJA1105, @@ -353,6 +363,7 @@ static const struct dsa_device_ops sja1105_netdev_ops = { .rcv = sja1105_rcv, .filter = sja1105_filter, .overhead = VLAN_HLEN, + .flow_dissect = sja1105_flow_dissect, .promisc_on_master = true, }; |