From nobody Sun Feb 8 02:41:23 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB7FBB665 for ; Tue, 3 Feb 2026 03:47:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770090479; cv=none; b=czljhZTYy+vFQTDAXQ48ccZ+3tKIH2fGt2CPHkx774N2Buc7ugrxkMd3AbydEj1sHXQ7FU29VsNHM5MQz7XXjTve5w2UmppDCDLPPpJ+3+GPxbzMTjNa7q/jA4neTMAybL3wH88ETTKKmNBOLsV3UI2ibvcb0fHAq7mfykYxiS4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770090479; c=relaxed/simple; bh=vov6tkqC87cnSOm8by38/8go1MTToOlVyH1VKguG0gg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JS6zrozWaqSTpSZwZCKBAFNnn0zPoX12zTZZ/GSKwrxMPk0pDt8rJpNG/3M8K/bNM6RkFMrn+Jrhc2Ic/OOiX7RouU1wGZHqLvGXvAkEUoorLw9s85e4/ZZ1xH3s1QaLt9GwUfvsbaKs5DXqbo5k4N88BqOUcK3y/gqIJDeYHgk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=abA1YyLm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="abA1YyLm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2862FC2BC87; Tue, 3 Feb 2026 03:47:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770090479; bh=vov6tkqC87cnSOm8by38/8go1MTToOlVyH1VKguG0gg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=abA1YyLmrlwkmyttZd77Pu165vZ9lVF8AqrFZZyyowNbQLsRl22hA9uo00JlFzRmi XzosE9Dk0zCSCOBzcVZPAWRPkfl5TKj10LSK0UH6xwdL30JgnMFDSSWwShouWXDvkS oPnAQyl9yLD7AJmACdvXP5XQxcV8wkY0H6GOg2+sUKSaORMqrUqUlJzmWxKhTruy4C NYRzoJiAtYuX3TknXW5swdNE9gVFPZptcMwQ4khXk7DZaxXrC0XBpvv0XzNQ/zB4l4 PXWaNzDBpqMv2X8kWskuuLS+yR9cCwIXuZzqsQbWCz6rT6erGl+Y5NRIZswEIys3Zo rlMgTkt9YocOw== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Gang Yan , Geliang Tang Subject: [PATCH mptcp-next v2 1/2] mptcp: check desc->count in read_sock Date: Tue, 3 Feb 2026 11:47:44 +0800 Message-ID: X-Mailer: git-send-email 2.52.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Gang Yan In __tcp_read_sock(), it checks whether desc->count equals 0 within the loop and breaks the loop if true. This check should also be synchronized to __mptcp_read_sock(). Co-developed-by: Geliang Tang Signed-off-by: Geliang Tang Signed-off-by: Gang Yan --- net/mptcp/protocol.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index c88882062c40..fd9a574d1dda 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -4382,6 +4382,8 @@ static int __mptcp_read_sock(struct sock *sk, read_de= scriptor_t *desc, } =20 mptcp_eat_recv_skb(sk, skb); + if (!desc->count) + break; } =20 if (noack) --=20 2.52.0 From nobody Sun Feb 8 02:41:23 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC1EB2581 for ; Tue, 3 Feb 2026 03:48:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770090481; cv=none; b=kHKDXt8vckZNaqTBGX7gfHv4U9VFv3hu9pEEO9rJ5IeKxNeKwrqEx+YHIuFYB50g6TdCbobjrxJ/vE19dx1FlAGuynLaAMJRTThuIOBpAIRLbdlYY7GfYRe8Huays8Ruanr7SDVK4qso3D/RAexShoufBbc8mGkalNTjM69YIeg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770090481; c=relaxed/simple; bh=7VW/geT0M1oAKnsquC10wcOuJNfEFREb937oETjqTMk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DrpjwlxEA6VVCheI9QXnlyC7ND9XW+S83BBra7qUyMl5DIbc/BcA88ZnW92ZfemDKcQCVQoDVsHgoAMoZHfYYffJzPh1xVDYuayQ4T56/od8ExAQQBUYAYIUNY7AQm1vX3wjpKrjJDxkzK0EU+Pzk3oA5RaoPOCaFFMwFNu6tdY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jjC36p7X; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jjC36p7X" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32FB6C116D0; Tue, 3 Feb 2026 03:47:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770090481; bh=7VW/geT0M1oAKnsquC10wcOuJNfEFREb937oETjqTMk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jjC36p7XrhrGtr/SoDv1v4xNdGXoCl0vlr8dkql4uxq+uCCsDdtGH5l/9QyoqNXvA sxo5CBw3Ww6euryKeJL0XqFVJzihrAMQDh/MvN8QosEt1uhKjjXvK9/wL/dg7iEHUJ wxLtDdoKcCD0iuM1EdEPxt+sGM8ea4v024Ni3U7SWkNqMANKgMQpcdSD0BjAtld4QU n5TK0lH/M9AO8QRtyQPeWcOvBxM99cq66dDLKeAssHrO1jspFlt/CNsuHAhCxvQw6i Rjc38U85cXNJUGXXXzxlk+jX1ucI2Smbi4SI/5bqyi9ZdBta1oC7zJAoyh0hIZwdY2 IgvBLH+yzYq6g== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang , Paolo Abeni , Mat Martineau Subject: [PATCH mptcp-next v2 2/2] tcp: add recv_should_stop helper Date: Tue, 3 Feb 2026 11:47:45 +0800 Message-ID: <5d485efb9c4cea80f3e5ec93f2b6d4b5eca7b1ef.1770089761.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.52.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Geliang Tang Factor out a new helper tcp_recv_should_stop() from tcp_recvmsg_locked() and tcp_splice_read() to check whether to stop receiving. And use this helper in mptcp_recvmsg() and mptcp_splice_read() to reduce redundant code. Suggested-by: Paolo Abeni Acked-by: Mat Martineau Signed-off-by: Geliang Tang --- include/net/tcp.h | 9 +++++++++ net/ipv4/tcp.c | 10 ++-------- net/mptcp/protocol.c | 10 ++-------- 3 files changed, 13 insertions(+), 16 deletions(-) diff --git a/include/net/tcp.h b/include/net/tcp.h index cecec1a92d5e..a64b6159f93c 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -2951,4 +2951,13 @@ enum skb_drop_reason tcp_inbound_hash(struct sock *s= k, const void *saddr, const void *daddr, int family, int dif, int sdif); =20 +static inline int tcp_recv_should_stop(struct sock *sk, long timeo) +{ + return sk->sk_err || + sk->sk_state =3D=3D TCP_CLOSE || + (sk->sk_shutdown & RCV_SHUTDOWN) || + signal_pending(current) || + !timeo; +} + #endif /* _TCP_H */ diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index ae0000215ff4..e6e07df3979f 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -894,9 +894,7 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *pp= os, release_sock(sk); lock_sock(sk); =20 - if (sk->sk_err || sk->sk_state =3D=3D TCP_CLOSE || - (sk->sk_shutdown & RCV_SHUTDOWN) || - signal_pending(current)) + if (tcp_recv_should_stop(sk, timeo)) break; } =20 @@ -2783,11 +2781,7 @@ static int tcp_recvmsg_locked(struct sock *sk, struc= t msghdr *msg, size_t len, break; =20 if (copied) { - if (!timeo || - sk->sk_err || - sk->sk_state =3D=3D TCP_CLOSE || - (sk->sk_shutdown & RCV_SHUTDOWN) || - signal_pending(current)) + if (tcp_recv_should_stop(sk, timeo)) break; } else { if (sock_flag(sk, SOCK_DONE)) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index fd9a574d1dda..9b0b6324fb56 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2316,11 +2316,7 @@ static int mptcp_recvmsg(struct sock *sk, struct msg= hdr *msg, size_t len, break; =20 if (copied) { - if (sk->sk_err || - sk->sk_state =3D=3D TCP_CLOSE || - (sk->sk_shutdown & RCV_SHUTDOWN) || - !timeo || - signal_pending(current)) + if (tcp_recv_should_stop(sk, timeo)) break; } else { if (sk->sk_err) { @@ -4506,9 +4502,7 @@ static ssize_t mptcp_splice_read(struct socket *sock,= loff_t *ppos, release_sock(sk); lock_sock(sk); =20 - if (sk->sk_err || sk->sk_state =3D=3D TCP_CLOSE || - (sk->sk_shutdown & RCV_SHUTDOWN) || - signal_pending(current)) + if (tcp_recv_should_stop(sk, timeo)) break; } =20 --=20 2.52.0