From nobody Mon Feb 9 05:20:26 2026 Received: from out-203.mta0.migadu.com (out-203.mta0.migadu.com [91.218.175.203]) (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 463807481 for ; Tue, 17 Oct 2023 03:02:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="WOSnVqLw" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1697511777; 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=i/3vUxr1J2aq5pv+HHKWWqG1NBDvCyErjmH6SiUBc5k=; b=WOSnVqLwz86/Pi6PiQBHAdvqCXGuTre3VC+t7aIzIuCBuxf4CPJTdvcPhx9gmt6myHhMQl w82c8ScX6SpFgL9b3bAYGKxZGFq/lrM58cdz2OcACOd36idLEYlL8iLAMzOxWFdefWSCV4 ms5WtdYUnjIcpj/7UX4UZ79eFrY62P8= From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v17 7/9] mptcp: userspace pm send RM_ADDR for ID 0 Date: Tue, 17 Oct 2023 11:00:26 +0800 Message-Id: <9b271203764b94eebc7d9c412d4949e7ce1dc208.1697511436.git.geliang.tang@suse.com> 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 X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" From: Geliang Tang This patch adds the ability to send RM_ADDR for local ID 0. Check whether id 0 address is removed, if not, put id 0 into a removing list, pass it to mptcp_pm_remove_addr() to remove id 0 address. There is no reason not to allow the userspace to remove the initial address (ID 0). This special case was not taken into account not letting the userspace to delete all addresses as announced. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/379 Fixes: d9a4594edabf ("mptcp: netlink: Add MPTCP_PM_CMD_REMOVE") Signed-off-by: Geliang Tang --- net/mptcp/pm_userspace.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index 6b8083650bc1..ea50e694125d 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -211,6 +211,40 @@ int mptcp_pm_nl_announce_doit(struct sk_buff *skb, str= uct genl_info *info) return err; } =20 +static int mptcp_userspace_remove_id_zero_address(struct mptcp_sock *msk, + struct genl_info *info) +{ + struct mptcp_rm_list list =3D { .nr =3D 0 }; + struct mptcp_subflow_context *subflow; + struct sock *sk =3D (struct sock *)msk; + bool has_id_0 =3D false; + int err =3D -EINVAL; + + lock_sock(sk); + mptcp_for_each_subflow(msk, subflow) { + if (subflow->local_id =3D=3D 0) { + has_id_0 =3D true; + break; + } + } + if (!has_id_0) { + GENL_SET_ERR_MSG(info, "address with id 0 not found"); + goto remove_err; + } + + list.ids[list.nr++] =3D 0; + + spin_lock_bh(&msk->pm.lock); + mptcp_pm_remove_addr(msk, &list); + spin_unlock_bh(&msk->pm.lock); + + err =3D 0; + +remove_err: + release_sock(sk); + return err; +} + int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info) { struct nlattr *token =3D info->attrs[MPTCP_PM_ATTR_TOKEN]; @@ -245,6 +279,11 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struc= t genl_info *info) goto remove_err; } =20 + if (id_val =3D=3D 0) { + err =3D mptcp_userspace_remove_id_zero_address(msk, info); + goto remove_err; + } + lock_sock(sk); =20 list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { --=20 2.35.3