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[82.132.230.8]) by smtp.gmail.com with ESMTPSA id z11-20020a7bc14b000000b0039419dfbb39sm7547wmi.33.2022.04.28.03.57.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Apr 2022 03:57:51 -0700 (PDT) From: Pavel Begunkov To: netdev@vger.kernel.org, "David S . Miller" , Jakub Kicinski Cc: David Ahern , Eric Dumazet , linux-kernel@vger.kernel.org, Pavel Begunkov Subject: [PATCH net-next 11/11] ipv6: clean up ip6_setup_cork Date: Thu, 28 Apr 2022 11:56:45 +0100 Message-Id: <683aab669ffa7db48416137c904a406a37e9a0c9.1651071843.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.36.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Do a bit of refactoring for ip6_setup_cork(). Cache a xfrm_dst_path() result to not call it twice, reshuffle ifs to not repeat some parts twice and so. Signed-off-by: Pavel Begunkov --- net/ipv6/ip6_output.c | 30 +++++++++++++----------------- 1 file changed, 13 insertions(+), 17 deletions(-) diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 416d14299242..a17b26d5f34d 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1358,15 +1358,13 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork, struct ipv6_pinfo *np = inet6_sk(sk); unsigned int mtu; struct ipv6_txoptions *nopt, *opt = ipc6->opt; + struct dst_entry *xrfm_dst; /* callers pass dst together with a reference, set it first so * ip6_cork_release() can put it down even in case of an error. */ cork->base.dst = &rt->dst; - /* - * setup for corking - */ if (opt) { if (WARN_ON(v6_cork->opt)) return -EINVAL; @@ -1399,28 +1397,26 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork, } v6_cork->hop_limit = ipc6->hlimit; v6_cork->tclass = ipc6->tclass; - if (rt->dst.flags & DST_XFRM_TUNNEL) - mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ? - READ_ONCE(rt->dst.dev->mtu) : dst_mtu(&rt->dst); + + xrfm_dst = xfrm_dst_path(&rt->dst); + if (dst_allfrag(xrfm_dst)) + cork->base.flags |= IPCORK_ALLFRAG; + + if (np->pmtudisc < IPV6_PMTUDISC_PROBE) + mtu = dst_mtu(rt->dst.flags & DST_XFRM_TUNNEL ? &rt->dst : xrfm_dst); else - mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ? - READ_ONCE(rt->dst.dev->mtu) : dst_mtu(xfrm_dst_path(&rt->dst)); - if (np->frag_size < mtu) { - if (np->frag_size) - mtu = np->frag_size; - } + mtu = READ_ONCE(rt->dst.dev->mtu); + + if (np->frag_size < mtu && np->frag_size) + mtu = np->frag_size; + cork->base.fragsize = mtu; cork->base.gso_size = ipc6->gso_size; cork->base.tx_flags = 0; cork->base.mark = ipc6->sockc.mark; sock_tx_timestamp(sk, ipc6->sockc.tsflags, &cork->base.tx_flags); - - if (dst_allfrag(xfrm_dst_path(&rt->dst))) - cork->base.flags |= IPCORK_ALLFRAG; cork->base.length = 0; - cork->base.transmit_time = ipc6->sockc.transmit_time; - return 0; }