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ipv6: add priority parameter to ip6_xmit()

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Currently, ip6_xmit() sets skb->priority based on sk->sk_priority

This is not desirable for TCP since TCP shares the same ctl socket
for a given netns. We want to be able to send RST or ACK packets
with a non zero skb->priority.

This patch has no functional change.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2019-09-24 08:01:14 -07:00
committed by David S. Miller
parent 2b6fd3ea43
commit 4f6570d720
6 changed files with 12 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
net/ipv6/inet6_connection_sock.c
View File

@@ -133,7 +133,7 @@ int inet6_csk_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl_unused
fl6.daddr = sk->sk_v6_daddr;
res = ip6_xmit(sk, skb, &fl6, sk->sk_mark, rcu_dereference(np->opt),
np->tclass);
np->tclass, sk->sk_priority);
rcu_read_unlock();
return res;
}

4
net/ipv6/ip6_output.c
View File

@@ -193,7 +193,7 @@ bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
* which are using proper atomic operations or spinlocks.
*/
int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
__u32 mark, struct ipv6_txoptions *opt, int tclass)
__u32 mark, struct ipv6_txoptions *opt, int tclass, u32 priority)
{
struct net *net = sock_net(sk);
const struct ipv6_pinfo *np = inet6_sk(sk);
@@ -258,7 +258,7 @@ int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
hdr->daddr = *first_hop;
skb->protocol = htons(ETH_P_IPV6);
skb->priority = sk->sk_priority;
skb->priority = priority;
skb->mark = mark;
mtu = dst_mtu(dst);

6
net/ipv6/tcp_ipv6.c
View File

@@ -512,7 +512,8 @@ static int tcp_v6_send_synack(const struct sock *sk, struct dst_entry *dst,
opt = ireq->ipv6_opt;
if (!opt)
opt = rcu_dereference(np->opt);
err = ip6_xmit(sk, skb, fl6, sk->sk_mark, opt, np->tclass);
err = ip6_xmit(sk, skb, fl6, sk->sk_mark, opt, np->tclass,
sk->sk_priority);
rcu_read_unlock();
err = net_xmit_eval(err);
}
@@ -907,7 +908,8 @@ static void tcp_v6_send_response(const struct sock *sk, struct sk_buff *skb, u32
dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL);
if (!IS_ERR(dst)) {
skb_dst_set(buff, dst);
ip6_xmit(ctl_sk, buff, &fl6, fl6.flowi6_mark, NULL, tclass);
ip6_xmit(ctl_sk, buff, &fl6, fl6.flowi6_mark, NULL, tclass,
0);
TCP_INC_STATS(net, TCP_MIB_OUTSEGS);
if (rst)
TCP_INC_STATS(net, TCP_MIB_OUTRSTS);