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net: tap: check vlan with eth_type_vlan() method 

Replace some checks for ETH_P_8021Q and ETH_P_8021AD in
drivers/net/tap.c with eth_type_vlan.

Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn>
Link: https://lore.kernel.org/r/20210115023238.4681-1-dong.menglong@zte.com.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Menglong Dong 2021-01-14 18:32:38 -08:00 committed by Jakub Kicinski
parent 32d91b4af3
commit b69df26082
1 changed files with 2 additions and 4 deletions
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6
drivers/net/tap.c
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@ -713,8 +713,7 @@ static ssize_t tap_get_user(struct tap_queue *q, void *msg_control,
skb_probe_transport_header(skb);
/* Move network header to the right position for VLAN tagged packets */
if ((skb->protocol == htons(ETH_P_8021Q) ||
skb->protocol == htons(ETH_P_8021AD)) &&
if (eth_type_vlan(skb->protocol) &&
__vlan_get_protocol(skb, skb->protocol, &depth) != 0)
skb_set_network_header(skb, depth);
@ -1164,8 +1163,7 @@ static int tap_get_user_xdp(struct tap_queue *q, struct xdp_buff *xdp)
}
/* Move network header to the right position for VLAN tagged packets */
if ((skb->protocol == htons(ETH_P_8021Q) ||
skb->protocol == htons(ETH_P_8021AD)) &&
if (eth_type_vlan(skb->protocol) &&
__vlan_get_protocol(skb, skb->protocol, &depth) != 0)
skb_set_network_header(skb, depth);