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Message-Id: <eae1be625797e0323e3e1e82b44cc0d716e2fcc9.1641863490.git.asml.silence@gmail.com>
Date: Tue, 11 Jan 2022 01:21:39 +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: Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
David Ahern <dsahern@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Willem de Bruijn <willemdebruijn.kernel@...il.com>,
linux-kernel@...r.kernel.org,
Pavel Begunkov <asml.silence@...il.com>
Subject: [PATCH 07/14] ipv6: pass flow in ip6_make_skb together with cork
Another preparation patch. inet_cork_full already contains a field for
iflow, so we can avoid passing a separate struct iflow6 into
__ip6_append_data() and ip6_make_skb(), and use the flow stored in
inet_cork_full. Make sure callers set cork->fl right, i.e. we init it in
ip6_append_data() and right before the only ip6_make_skb() call.
Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
include/net/ipv6.h | 2 +-
net/ipv6/ip6_output.c | 20 +++++++++-----------
net/ipv6/udp.c | 4 +++-
3 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 3afcb128e064..5e0b56d66724 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -1020,7 +1020,7 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
int getfrag(void *from, char *to, int offset,
int len, int odd, struct sk_buff *skb),
void *from, int length, int transhdrlen,
- struct ipcm6_cookie *ipc6, struct flowi6 *fl6,
+ struct ipcm6_cookie *ipc6,
struct rt6_info *rt, unsigned int flags,
struct inet_cork_full *cork);
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 62da09819750..0cc490f2cfbf 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1350,7 +1350,7 @@ static void ip6_append_data_mtu(unsigned int *mtu,
static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
struct inet6_cork *v6_cork, struct ipcm6_cookie *ipc6,
- struct rt6_info *rt, struct flowi6 *fl6)
+ struct rt6_info *rt)
{
struct ipv6_pinfo *np = inet6_sk(sk);
unsigned int mtu;
@@ -1391,7 +1391,6 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
}
dst_hold(&rt->dst);
cork->base.dst = &rt->dst;
- cork->fl.u.ip6 = *fl6;
v6_cork->hop_limit = ipc6->hlimit;
v6_cork->tclass = ipc6->tclass;
if (rt->dst.flags & DST_XFRM_TUNNEL)
@@ -1422,7 +1421,6 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
}
static int __ip6_append_data(struct sock *sk,
- struct flowi6 *fl6,
struct sk_buff_head *queue,
struct inet_cork_full *cork_full,
struct inet6_cork *v6_cork,
@@ -1434,6 +1432,7 @@ static int __ip6_append_data(struct sock *sk,
{
struct sk_buff *skb, *skb_prev = NULL;
struct inet_cork *cork = &cork_full->base;
+ struct flowi6 *fl6 = &cork_full->fl.u.ip6;
unsigned int maxfraglen, fragheaderlen, mtu, orig_mtu, pmtu;
struct ubuf_info *uarg = NULL;
int exthdrlen = 0;
@@ -1786,19 +1785,19 @@ int ip6_append_data(struct sock *sk,
* setup for corking
*/
err = ip6_setup_cork(sk, &inet->cork, &np->cork,
- ipc6, rt, fl6);
+ ipc6, rt);
if (err)
return err;
+ inet->cork.fl.u.ip6 = *fl6;
exthdrlen = (ipc6->opt ? ipc6->opt->opt_flen : 0);
length += exthdrlen;
transhdrlen += exthdrlen;
} else {
- fl6 = &inet->cork.fl.u.ip6;
transhdrlen = 0;
}
- return __ip6_append_data(sk, fl6, &sk->sk_write_queue, &inet->cork,
+ return __ip6_append_data(sk, &sk->sk_write_queue, &inet->cork,
&np->cork, sk_page_frag(sk), getfrag,
from, length, transhdrlen, flags, ipc6);
}
@@ -1967,9 +1966,8 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
int getfrag(void *from, char *to, int offset,
int len, int odd, struct sk_buff *skb),
void *from, int length, int transhdrlen,
- struct ipcm6_cookie *ipc6, struct flowi6 *fl6,
- struct rt6_info *rt, unsigned int flags,
- struct inet_cork_full *cork)
+ struct ipcm6_cookie *ipc6, struct rt6_info *rt,
+ unsigned int flags, struct inet_cork_full *cork)
{
struct inet6_cork v6_cork;
struct sk_buff_head queue;
@@ -1986,7 +1984,7 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
cork->base.opt = NULL;
cork->base.dst = NULL;
v6_cork.opt = NULL;
- err = ip6_setup_cork(sk, cork, &v6_cork, ipc6, rt, fl6);
+ err = ip6_setup_cork(sk, cork, &v6_cork, ipc6, rt);
if (err) {
ip6_cork_release(cork, &v6_cork);
return ERR_PTR(err);
@@ -1994,7 +1992,7 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
if (ipc6->dontfrag < 0)
ipc6->dontfrag = inet6_sk(sk)->dontfrag;
- err = __ip6_append_data(sk, fl6, &queue, cork, &v6_cork,
+ err = __ip6_append_data(sk, &queue, cork, &v6_cork,
¤t->task_frag, getfrag, from,
length + exthdrlen, transhdrlen + exthdrlen,
flags, ipc6);
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 9a91b51d8e3f..2580705431ea 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1533,9 +1533,11 @@ int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
struct inet_cork_full cork;
struct sk_buff *skb;
+ cork.fl.u.ip6 = fl6;
+
skb = ip6_make_skb(sk, getfrag, msg, ulen,
sizeof(struct udphdr), &ipc6,
- &fl6, (struct rt6_info *)dst,
+ (struct rt6_info *)dst,
msg->msg_flags, &cork);
err = PTR_ERR(skb);
if (!IS_ERR_OR_NULL(skb))
--
2.34.1
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