This is a note to let you know that I've just added the patch titled
ethernet: Add helper for assigning packet type when dest address does not match device address
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ethernet-add-helper-for-assigning-packet-type-when-dest-address-does-not-match-device-address.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6e159fd653d7ebf6290358e0330a0cb8a75cf73b Mon Sep 17 00:00:00 2001
From: Rahul Rameshbabu <rrameshbabu@xxxxxxxxxx>
Date: Tue, 23 Apr 2024 11:13:03 -0700
Subject: ethernet: Add helper for assigning packet type when dest address does not match device address
From: Rahul Rameshbabu <rrameshbabu@xxxxxxxxxx>
commit 6e159fd653d7ebf6290358e0330a0cb8a75cf73b upstream.
Enable reuse of logic in eth_type_trans for determining packet type.
Suggested-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Rahul Rameshbabu <rrameshbabu@xxxxxxxxxx>
Reviewed-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240423181319.115860-3-rrameshbabu@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/etherdevice.h | 25 +++++++++++++++++++++++++
net/ethernet/eth.c | 12 +-----------
2 files changed, 26 insertions(+), 11 deletions(-)
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -532,6 +532,31 @@ static inline unsigned long compare_ethe
}
/**
+ * eth_skb_pkt_type - Assign packet type if destination address does not match
+ * @skb: Assigned a packet type if address does not match @dev address
+ * @dev: Network device used to compare packet address against
+ *
+ * If the destination MAC address of the packet does not match the network
+ * device address, assign an appropriate packet type.
+ */
+static inline void eth_skb_pkt_type(struct sk_buff *skb,
+ const struct net_device *dev)
+{
+ const struct ethhdr *eth = eth_hdr(skb);
+
+ if (unlikely(!ether_addr_equal_64bits(eth->h_dest, dev->dev_addr))) {
+ if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) {
+ if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
+ skb->pkt_type = PACKET_BROADCAST;
+ else
+ skb->pkt_type = PACKET_MULTICAST;
+ } else {
+ skb->pkt_type = PACKET_OTHERHOST;
+ }
+ }
+}
+
+/**
* eth_skb_pad - Pad buffer to mininum number of octets for Ethernet frame
* @skb: Buffer to pad
*
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -164,17 +164,7 @@ __be16 eth_type_trans(struct sk_buff *sk
eth = (struct ethhdr *)skb->data;
skb_pull_inline(skb, ETH_HLEN);
- if (unlikely(!ether_addr_equal_64bits(eth->h_dest,
- dev->dev_addr))) {
- if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) {
- if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
- skb->pkt_type = PACKET_BROADCAST;
- else
- skb->pkt_type = PACKET_MULTICAST;
- } else {
- skb->pkt_type = PACKET_OTHERHOST;
- }
- }
+ eth_skb_pkt_type(skb, dev);
/*
* Some variants of DSA tagging don't have an ethertype field
Patches currently in stable-queue which might be from rrameshbabu@xxxxxxxxxx are
queue-5.4/ethernet-add-helper-for-assigning-packet-type-when-dest-address-does-not-match-device-address.patch
