提交 c483e026 编写于 作者: P Phil Sutter 提交者: David S. Miller

af_packet: simplify VLAN frame check in packet_snd

For ethernet frames, eth_type_trans() already parses the header, so one
can skip this when checking the frame size.
Signed-off-by: NPhil Sutter <phil@nwl.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 cbd89acb
......@@ -2333,24 +2333,17 @@ static int packet_snd(struct socket *sock,
if (dev->type == ARPHRD_ETHER) {
skb->protocol = eth_type_trans(skb, dev);
if (skb->protocol == htons(ETH_P_8021Q))
reserve += VLAN_HLEN;
} else {
skb->protocol = proto;
skb->dev = dev;
}
if (!gso_type && (len > dev->mtu + reserve + extra_len)) {
/* Earlier code assumed this would be a VLAN pkt,
* double-check this now that we have the actual
* packet in hand.
*/
struct ethhdr *ehdr;
skb_reset_mac_header(skb);
ehdr = eth_hdr(skb);
if (ehdr->h_proto != htons(ETH_P_8021Q)) {
err = -EMSGSIZE;
goto out_free;
}
}
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
......
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