From patchwork Fri Nov 27 10:10:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Abeni X-Patchwork-Id: 1407110 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=SPdZl3Uc; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Cj9Pj2p1Dz9s1l for ; Fri, 27 Nov 2020 21:11:05 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727107AbgK0KKu (ORCPT ); Fri, 27 Nov 2020 05:10:50 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:29959 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725854AbgK0KKt (ORCPT ); Fri, 27 Nov 2020 05:10:49 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1606471848; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=TfdqAVYhzEvrCFECZLS/WUpqTUKd31Cq3Z5fIDccb/4=; b=SPdZl3UclC5SqmGKhfWwEVoDSHX1+9lxIaNsA7lQP5pXjDzWG9JUqSJCf7IAxzLuC48a/K Kvtxcq3xASZRCBiCVs4HQvsieFl6mDYYy7ewu0ZFZ0CGEXUkh3BPIzaVDJet9apzusBhrV m3FTWHV7h/dVNjXCo66EVBSuFNxWU6s= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-211-pdWqnJg3PIudhyYpboTSFw-1; Fri, 27 Nov 2020 05:10:44 -0500 X-MC-Unique: pdWqnJg3PIudhyYpboTSFw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C739D805BFA; Fri, 27 Nov 2020 10:10:41 +0000 (UTC) Received: from gerbillo.redhat.com (ovpn-113-134.ams2.redhat.com [10.36.113.134]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9F5CF1000320; Fri, 27 Nov 2020 10:10:40 +0000 (UTC) From: Paolo Abeni To: netdev@vger.kernel.org Cc: Jakub Kicinski , mptcp@lists.01.org, Eric Dumazet Subject: [PATCH net-next 1/6] mptcp: open code mptcp variant for lock_sock Date: Fri, 27 Nov 2020 11:10:22 +0100 Message-Id: In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This allows invoking an additional callback under the socket spin lock. Will be used by the next patches to avoid additional spin lock contention. Acked-by: Florian Westphal Signed-off-by: Paolo Abeni Reviewed-by: Mat Martineau --- include/net/sock.h | 1 + net/core/sock.c | 2 +- net/mptcp/protocol.h | 13 +++++++++++++ 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/include/net/sock.h b/include/net/sock.h index 80469c2c448d..f59764614e30 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1590,6 +1590,7 @@ static inline void lock_sock(struct sock *sk) lock_sock_nested(sk, 0); } +void __lock_sock(struct sock *sk); void __release_sock(struct sock *sk); void release_sock(struct sock *sk); diff --git a/net/core/sock.c b/net/core/sock.c index 9badbe7bb4e4..f0f096852876 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -2486,7 +2486,7 @@ bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag) } EXPORT_SYMBOL(sk_page_frag_refill); -static void __lock_sock(struct sock *sk) +void __lock_sock(struct sock *sk) __releases(&sk->sk_lock.slock) __acquires(&sk->sk_lock.slock) { diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 82d5626323b1..6abac8238de3 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -253,6 +253,19 @@ struct mptcp_sock { } rcvq_space; }; +#define mptcp_lock_sock(___sk, cb) do { \ + struct sock *__sk = (___sk); /* silence macro reuse warning */ \ + might_sleep(); \ + spin_lock_bh(&__sk->sk_lock.slock); \ + if (__sk->sk_lock.owned) \ + __lock_sock(__sk); \ + cb; \ + __sk->sk_lock.owned = 1; \ + spin_unlock(&__sk->sk_lock.slock); \ + mutex_acquire(&__sk->sk_lock.dep_map, 0, 0, _RET_IP_); \ + local_bh_enable(); \ +} while (0) + #define mptcp_for_each_subflow(__msk, __subflow) \ list_for_each_entry(__subflow, &((__msk)->conn_list), node)