From: Jakub Sitnicki <jakub@cloudflare.com>
To: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org, kernel-team@cloudflare.com,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
Lorenz Bauer <lmb@cloudflare.com>, Martin Lau <kafai@fb.com>
Subject: [PATCH bpf-next v3 01/12] bpf, sk_msg: Don't clear saved sock proto on restore
Date: Wed, 22 Jan 2020 14:05:38 +0100 [thread overview]
Message-ID: <20200122130549.832236-2-jakub@cloudflare.com> (raw)
In-Reply-To: <20200122130549.832236-1-jakub@cloudflare.com>
There is no need to clear psock->sk_proto when restoring socket protocol
callbacks in sk->sk_prot. The psock is about to get detached from the sock
and eventually destroyed. At worst we will restore the protocol callbacks
twice.
This makes reasoning about psock state easier. Once psock is initialized,
we can count on psock->sk_proto always being set.
Also, we don't need a fallback for when socket is not using ULP.
tcp_update_ulp already does this for us.
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
---
include/linux/skmsg.h | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/include/linux/skmsg.h b/include/linux/skmsg.h
index ef7031f8a304..41ea1258d15e 100644
--- a/include/linux/skmsg.h
+++ b/include/linux/skmsg.h
@@ -359,17 +359,7 @@ static inline void sk_psock_restore_proto(struct sock *sk,
struct sk_psock *psock)
{
sk->sk_write_space = psock->saved_write_space;
-
- if (psock->sk_proto) {
- struct inet_connection_sock *icsk = inet_csk(sk);
- bool has_ulp = !!icsk->icsk_ulp_data;
-
- if (has_ulp)
- tcp_update_ulp(sk, psock->sk_proto);
- else
- sk->sk_prot = psock->sk_proto;
- psock->sk_proto = NULL;
- }
+ tcp_update_ulp(sk, psock->sk_proto);
}
static inline void sk_psock_set_state(struct sk_psock *psock,
--
2.24.1
next prev parent reply other threads:[~2020-01-22 13:05 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 13:05 [PATCH bpf-next v3 00/12] Extend SOCKMAP to store listening sockets Jakub Sitnicki
2020-01-22 13:05 ` Jakub Sitnicki [this message]
2020-01-22 13:05 ` [PATCH bpf-next v3 02/12] net, sk_msg: Annotate lockless access to sk_prot on clone Jakub Sitnicki
2020-01-22 22:57 ` Martin Lau
2020-01-22 13:05 ` [PATCH bpf-next v3 03/12] net, sk_msg: Clear sk_user_data pointer on clone if tagged Jakub Sitnicki
2020-01-22 13:05 ` [PATCH bpf-next v3 04/12] tcp_bpf: Don't let child socket inherit parent protocol ops on copy Jakub Sitnicki
2020-01-22 20:35 ` Martin Lau
2020-01-23 10:34 ` Jakub Sitnicki
2020-01-22 13:05 ` [PATCH bpf-next v3 05/12] bpf, sockmap: Allow inserting listening TCP sockets into sockmap Jakub Sitnicki
2020-01-22 20:52 ` Martin Lau
2020-01-23 10:41 ` Jakub Sitnicki
2020-01-22 13:05 ` [PATCH bpf-next v3 06/12] bpf, sockmap: Don't set up sockmap progs for listening sockets Jakub Sitnicki
2020-01-22 16:24 ` Lorenz Bauer
2020-01-22 18:07 ` Jakub Sitnicki
2020-01-22 23:11 ` Martin Lau
2020-01-22 13:05 ` [PATCH bpf-next v3 07/12] bpf, sockmap: Return socket cookie on lookup from syscall Jakub Sitnicki
2020-01-22 13:05 ` [PATCH bpf-next v3 08/12] bpf, sockmap: Let all kernel-land lookup values in SOCKMAP Jakub Sitnicki
2020-01-22 23:02 ` Martin Lau
2020-01-22 13:05 ` [PATCH bpf-next v3 09/12] bpf: Allow selecting reuseport socket from a SOCKMAP Jakub Sitnicki
2020-01-22 23:08 ` Martin Lau
2020-01-22 13:05 ` [PATCH bpf-next v3 10/12] net: Generate reuseport group ID on group creation Jakub Sitnicki
2020-01-22 22:53 ` Martin Lau
2020-01-23 10:59 ` Jakub Sitnicki
2020-01-22 13:05 ` [PATCH bpf-next v3 11/12] selftests/bpf: Extend SK_REUSEPORT tests to cover SOCKMAP Jakub Sitnicki
2020-01-22 13:05 ` [PATCH bpf-next v3 12/12] selftests/bpf: Tests for SOCKMAP holding listening sockets Jakub Sitnicki
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