4.19-stable review patch. If anyone has any objections, please let me know.
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From: Rahul Rameshbabu rrameshbabu@nvidia.com
[ Upstream commit 6e159fd653d7ebf6290358e0330a0cb8a75cf73b ]
Enable reuse of logic in eth_type_trans for determining packet type.
Suggested-by: Sabrina Dubroca sd@queasysnail.net Cc: stable@vger.kernel.org Signed-off-by: Rahul Rameshbabu rrameshbabu@nvidia.com Reviewed-by: Sabrina Dubroca sd@queasysnail.net Link: https://lore.kernel.org/r/20240423181319.115860-3-rrameshbabu@nvidia.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/etherdevice.h | 25 +++++++++++++++++++++++++ net/ethernet/eth.c | 12 +----------- 2 files changed, 26 insertions(+), 11 deletions(-)
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index fef4bb77f7590..267b3cbc7ae13 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -543,6 +543,31 @@ static inline void eth_hw_addr_gen(struct net_device *dev, const u8 *base_addr, eth_hw_addr_set(dev, addr); }
+/** + * 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 diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c index 88a074dd983e6..31be0b426e839 100644 --- a/net/ethernet/eth.c +++ b/net/ethernet/eth.c @@ -165,17 +165,7 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev) 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