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Date: Thu, 27 Jan 2022 00:36:24 +0000 From: Pavel Begunkov <asml.silence@...il.com> To: netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org> Cc: Eric Dumazet <edumazet@...gle.com>, Willem de Bruijn <willemdebruijn.kernel@...il.com>, linux-kernel@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>, Pavel Begunkov <asml.silence@...il.com> Subject: [PATCH net-next v2 03/10] ipv6: remove daddr temp buffer in __ip6_make_skb ipv6_push_nfrag_opts() doesn't change passed daddr, and so __ip6_make_skb() doesn't actually need to keep an on-stack copy of fl6->daddr. Set initially final_dst to fl6->daddr, ipv6_push_nfrag_opts() will override it if needed, and get rid of extra copies. Signed-off-by: Pavel Begunkov <asml.silence@...il.com> --- net/ipv6/ip6_output.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 14d607ccfeea..4acd577d5ec5 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1843,7 +1843,7 @@ struct sk_buff *__ip6_make_skb(struct sock *sk, { struct sk_buff *skb, *tmp_skb; struct sk_buff **tail_skb; - struct in6_addr final_dst_buf, *final_dst = &final_dst_buf; + struct in6_addr *final_dst; struct ipv6_pinfo *np = inet6_sk(sk); struct net *net = sock_net(sk); struct ipv6hdr *hdr; @@ -1873,9 +1873,9 @@ struct sk_buff *__ip6_make_skb(struct sock *sk, /* Allow local fragmentation. */ skb->ignore_df = ip6_sk_ignore_df(sk); - - *final_dst = fl6->daddr; __skb_pull(skb, skb_network_header_len(skb)); + + final_dst = &fl6->daddr; if (opt && opt->opt_flen) ipv6_push_frag_opts(skb, opt, &proto); if (opt && opt->opt_nflen) @@ -1895,7 +1895,6 @@ struct sk_buff *__ip6_make_skb(struct sock *sk, skb->priority = sk->sk_priority; skb->mark = cork->base.mark; - skb->tstamp = cork->base.transmit_time; ip6_cork_steal_dst(skb, cork); -- 2.34.1
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