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net: do not use skb_mac_header() in qdisc_pkt_len_init() 

We want to remove our use of skb_mac_header() in tx paths,
eg remove skb_reset_mac_header() from __dev_queue_xmit().

Idea is that ndo_start_xmit() can get the mac header
simply looking at skb->data.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2023-03-21 16:45:17 +00:00 committed by Jakub Kicinski
parent b50fea1f26
commit f5fca219ad
1 changed files with 4 additions and 4 deletions
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8
net/core/dev.c
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@ -3735,25 +3735,25 @@ static void qdisc_pkt_len_init(struct sk_buff *skb)
* we add to pkt_len the headers size of all segments
*/
if (shinfo->gso_size && skb_transport_header_was_set(skb)) {
unsigned int hdr_len;
u16 gso_segs = shinfo->gso_segs;
unsigned int hdr_len;
/* mac layer + network layer */
hdr_len = skb_transport_header(skb) - skb_mac_header(skb);
hdr_len = skb_transport_offset(skb);
/* + transport layer */
if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))) {
const struct tcphdr *th;
struct tcphdr _tcphdr;
th = skb_header_pointer(skb, skb_transport_offset(skb),
th = skb_header_pointer(skb, hdr_len,
sizeof(_tcphdr), &_tcphdr);
if (likely(th))
hdr_len += __tcp_hdrlen(th);
} else {
struct udphdr _udphdr;
if (skb_header_pointer(skb, skb_transport_offset(skb),
if (skb_header_pointer(skb, hdr_len,
sizeof(_udphdr), &_udphdr))
hdr_len += sizeof(struct udphdr);
}