Messages in this thread Patch in this message | | | From | Alexander Lobakin <> | Subject | [PATCH RFC net-next 13/19] net: dsa: tag_lan9303: add GRO callbacks | Date | Mon, 30 Dec 2019 17:30:21 +0300 |
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Add GRO callbacks for LAN9303 tagger to make GRO available for frames tagged with it.
Signed-off-by: Alexander Lobakin <alobakin@dlink.ru> --- net/dsa/tag_lan9303.c | 77 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+)
diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c index ba03502986a4..77aba4311f2d 100644 --- a/net/dsa/tag_lan9303.c +++ b/net/dsa/tag_lan9303.c @@ -151,12 +151,89 @@ static void lan9303_flow_dissect(const struct sk_buff *skb, __be16 *proto, *proto = lan9303_encap_proto(skb->data); } +static struct sk_buff *lan9303_gro_receive(struct list_head *head, + struct sk_buff *skb) +{ + const struct packet_offload *ptype; + struct sk_buff *p, *pp = NULL; + const u8 *data, *data_p; + u32 data_off, data_end; + int flush = 1; + + data_off = skb_gro_offset(skb); + data_end = data_off + LAN9303_TAG_LEN; + + data = skb_gro_header_fast(skb, data_off); + if (skb_gro_header_hard(skb, data_end)) { + data = skb_gro_header_slow(skb, data_end, data_off); + if (unlikely(!data)) + goto out; + } + + /* Data that is to the left to the current position is already + * pulled to the head + */ + if (!lan9303_sanity_check(skb->data + data_off)) + goto out; + + rcu_read_lock(); + + ptype = gro_find_receive_by_type(lan9303_encap_proto(data)); + if (!ptype) + goto out_unlock; + + flush = 0; + + list_for_each_entry(p, head, list) { + if (!NAPI_GRO_CB(p)->same_flow) + continue; + + data_p = p->data + data_off; + if (lan9303_source_port(data) ^ lan9303_source_port(data_p)) + NAPI_GRO_CB(p)->same_flow = 0; + } + + skb_gro_pull(skb, LAN9303_TAG_LEN); + skb_gro_postpull_rcsum(skb, data, LAN9303_TAG_LEN); + + pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); + +out_unlock: + rcu_read_unlock(); +out: + skb_gro_flush_final(skb, pp, flush); + + return pp; +} + +static int lan9303_gro_complete(struct sk_buff *skb, int nhoff) +{ + const struct packet_offload *ptype; + int err = -ENOENT; + __be16 proto; + + proto = lan9303_encap_proto(skb->data + nhoff); + nhoff += LAN9303_TAG_LEN; + + rcu_read_lock(); + + ptype = gro_find_complete_by_type(proto); + if (ptype) + err = ptype->callbacks.gro_complete(skb, nhoff); + + rcu_read_unlock(); + + return err; +} + static const struct dsa_device_ops lan9303_netdev_ops = { .name = "lan9303", .proto = DSA_TAG_PROTO_LAN9303, .xmit = lan9303_xmit, .rcv = lan9303_rcv, .flow_dissect = lan9303_flow_dissect, + .gro_receive = lan9303_gro_receive, + .gro_complete = lan9303_gro_complete, .overhead = LAN9303_TAG_LEN, }; -- 2.24.1
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