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net: indirect call helpers for ipv4/ipv6 dst_check functions

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This patch avoids the indirect call for the common case:
ip6_dst_check and ipv4_dst_check

Signed-off-by: Brian Vazquez <brianvv@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Brian Vazquez 2021-02-01 17:41:32 +00:00 • committed by Jakub Kicinski
parent f67fbeaebd
commit bbd807dfbf
6 changed files with 34 additions and 9 deletions
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12
net/core/sock.c
View file

@ -526,11 +526,17 @@ discard_and_relse:
}
EXPORT_SYMBOL(__sk_receive_skb);
INDIRECT_CALLABLE_DECLARE(struct dst_entry *ip6_dst_check(struct dst_entry *,
u32));
INDIRECT_CALLABLE_DECLARE(struct dst_entry *ipv4_dst_check(struct dst_entry *,
u32));
struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie)
{
struct dst_entry *dst = __sk_dst_get(sk);
if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
if (dst && dst->obsolete &&
INDIRECT_CALL_INET(dst->ops->check, ip6_dst_check, ipv4_dst_check,
dst, cookie) == NULL) {
sk_tx_queue_clear(sk);
sk->sk_dst_pending_confirm = 0;
RCU_INIT_POINTER(sk->sk_dst_cache, NULL);
@ -546,7 +552,9 @@ struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie)
{
struct dst_entry *dst = sk_dst_get(sk);
if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
if (dst && dst->obsolete &&
INDIRECT_CALL_INET(dst->ops->check, ip6_dst_check, ipv4_dst_check,
dst, cookie) == NULL) {
sk_dst_reset(sk);
dst_release(dst);
return NULL;