[PATCH 5.13 05/35] skmsg: Pass source psock to sk_psock_skb_redirect()

Greg Kroah-Hartman
2021-08-06T08:24:43Z

From: Cong Wang <cong.wang@bytedance.com>

[ Upstream commit 42830571f1fd9751b3fbf38084bbb253320e185f ]

sk_psock_skb_redirect() only takes skb as a parameter, we
will need to know where this skb is from, so just pass
the source psock to this function as a new parameter.
This patch prepares for the next one.

Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20210615021342.7416-8-xiyou.wangcong@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/core/skmsg.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index d428368a0d87..b088fe07fc00 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -859,7 +859,7 @@ int sk_psock_msg_verdict(struct sock *sk, struct sk_psock *psock,
}
EXPORT_SYMBOL_GPL(sk_psock_msg_verdict);

-static int sk_psock_skb_redirect(struct sk_buff *skb)
+static int sk_psock_skb_redirect(struct sk_psock *from, struct sk_buff *skb)
{
struct sk_psock *psock_other;
struct sock *sk_other;
@@ -896,11 +896,12 @@ static int sk_psock_skb_redirect(struct sk_buff *skb)
return 0;
}

-static void sk_psock_tls_verdict_apply(struct sk_buff *skb, struct sock *sk, int verdict)
+static void sk_psock_tls_verdict_apply(struct sk_buff *skb,
+ struct sk_psock *from, int verdict)
{
switch (verdict) {
case __SK_REDIRECT:
- sk_psock_skb_redirect(skb);
+ sk_psock_skb_redirect(from, skb);
break;
case __SK_PASS:
case __SK_DROP:
@@ -924,7 +925,7 @@ int sk_psock_tls_strp_read(struct sk_psock *psock, struct sk_buff *skb)
ret = sk_psock_map_verd(ret, skb_bpf_redirect_fetch(skb));
skb->sk = NULL;
}
- sk_psock_tls_verdict_apply(skb, psock->sk, ret);
+ sk_psock_tls_verdict_apply(skb, psock, ret);
rcu_read_unlock();
return ret;
}
@@ -971,7 +972,7 @@ static int sk_psock_verdict_apply(struct sk_psock *psock, struct sk_buff *skb,
}
break;
case __SK_REDIRECT:
- err = sk_psock_skb_redirect(skb);
+ err = sk_psock_skb_redirect(psock, skb);
break;
case __SK_DROP:
default:
--
2.30.2