From mboxrd@z Thu Jan 1 00:00:00 1970 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 44BAC1DF726; Wed, 6 Nov 2024 12:22:22 +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=1730895742; cv=none; b=tkR6kXjZsCj9tj7VAh3FC5cHwT0nI0fEGdrG6YlFcveWl92ogwDZcHuzoVvKWXufi2mOwpP4E7HyOOv9NwxEI6rlfNDD4bOuZq3rH5xR9Kp/mndVkq+hk+E1NSYBjQrKR6hJLqF8Hrw5K25V77RewD1PFr9REVumo2EO/bM91ps= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730895742; c=relaxed/simple; bh=0i+RItifkWfm7cGWqiXz3ykTNHafLwr7lxziLwJuFZY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qdZzT/z2gRkkChcAjdIKBjIE7JQTH0iGCYc7aHlPyse336WPTI+Bvwf1hAl4q+mpRnpNEDpKZdycRUnmZfWh76g4/XhMdIeJenhMMi+YZyfqFmgW+I8li+Llw7MACaCgMwfmfBJaN2haqH0deJQxMeewAb3sFiwI+X1+dveMeeA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2sKITsTw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="2sKITsTw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 767B9C4CED8; Wed, 6 Nov 2024 12:22:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730895742; bh=0i+RItifkWfm7cGWqiXz3ykTNHafLwr7lxziLwJuFZY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2sKITsTwimKsSkYNpSOrdDWC/JbESlQJohw+u6ZkLGme0nWYsPeHo/tR5fLCA3UYU xe8pJnCCCnwutvnzaBJ+z/GiwxGyzRbNIl5M1BPSyjfZrvdul6/WgGNwePAJE6dROd imGGcGbsYEme6XRtRaBY12i4MM1xaYIGepPWJJuM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stephen Hemminger , Haiyang Zhang , Simon Horman , Paolo Abeni Subject: [PATCH 4.19 319/350] hv_netvsc: Fix VF namespace also in synthetic NIC NETDEV_REGISTER event Date: Wed, 6 Nov 2024 13:04:07 +0100 Message-ID: <20241106120328.632846383@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241106120320.865793091@linuxfoundation.org> References: <20241106120320.865793091@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Haiyang Zhang commit 4c262801ea60c518b5bebc22a09f5b78b3147da2 upstream. The existing code moves VF to the same namespace as the synthetic NIC during netvsc_register_vf(). But, if the synthetic device is moved to a new namespace after the VF registration, the VF won't be moved together. To make the behavior more consistent, add a namespace check for synthetic NIC's NETDEV_REGISTER event (generated during its move), and move the VF if it is not in the same namespace. Cc: stable@vger.kernel.org Fixes: c0a41b887ce6 ("hv_netvsc: move VF to same namespace as netvsc device") Suggested-by: Stephen Hemminger Signed-off-by: Haiyang Zhang Reviewed-by: Simon Horman Link: https://patch.msgid.link/1729275922-17595-1-git-send-email-haiyangz@microsoft.com Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- drivers/net/hyperv/netvsc_drv.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -2526,6 +2526,31 @@ static struct hv_driver netvsc_drv = { }, }; +/* Set VF's namespace same as the synthetic NIC */ +static void netvsc_event_set_vf_ns(struct net_device *ndev) +{ + struct net_device_context *ndev_ctx = netdev_priv(ndev); + struct net_device *vf_netdev; + int ret; + + vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); + if (!vf_netdev) + return; + + if (!net_eq(dev_net(ndev), dev_net(vf_netdev))) { + ret = dev_change_net_namespace(vf_netdev, dev_net(ndev), + "eth%d"); + if (ret) + netdev_err(vf_netdev, + "Cannot move to same namespace as %s: %d\n", + ndev->name, ret); + else + netdev_info(vf_netdev, + "Moved VF to namespace with: %s\n", + ndev->name); + } +} + /* * On Hyper-V, every VF interface is matched with a corresponding * synthetic interface. The synthetic interface is presented first @@ -2538,6 +2563,11 @@ static int netvsc_netdev_event(struct no struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); int ret = 0; + if (event_dev->netdev_ops == &device_ops && event == NETDEV_REGISTER) { + netvsc_event_set_vf_ns(event_dev); + return NOTIFY_DONE; + } + ret = check_dev_is_matching_vf(event_dev); if (ret != 0) return NOTIFY_DONE;