From patchwork Mon Feb 10 13:29:51 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Liang X-Patchwork-Id: 13967887 Received: from mail-pl1-f179.google.com (mail-pl1-f179.google.com [209.85.214.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 279F017BB6; Mon, 10 Feb 2025 13:30:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739194219; cv=none; b=YmNuM6CwIEH5ym4KOgrUrVE4m/ciSMIpbebhONHGHyitL80x/Wj54M57o11x3arhSj7ZHIVmkI+WNM42cQZ+OT1y7eyiSQ/IBG7z9AJNsyjuYqaN53owzqtUAfUaD7FQHq+YJwNLXGDAEtFwHAYWj1CjwtMK22N6JQbkqv+wNUU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739194219; c=relaxed/simple; bh=JWT9jVfwqIPjzXgKMkQZPpiZ8wjCF2EonWQINvODLL4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=HVd8+RlFtrPeMVIseaGS6Y8uzssSqo46ohfwMhgXtEkmx6DLNULWVPB8pOo8KjT7+Nd7A2AXcN0YlxtTYfe73dVd7iikRZaghsO8DJm7bwjk3EMXiuG0+MtuGK07Mto2b3IiZw20ezN80Mwy9CUno8PnPt493+GdNl01aiOOTxo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=MZMbEjaN; arc=none smtp.client-ip=209.85.214.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MZMbEjaN" Received: by mail-pl1-f179.google.com with SMTP id d9443c01a7336-21f62cc4088so40062675ad.3; Mon, 10 Feb 2025 05:30:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1739194217; x=1739799017; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Y0kuY/qnmLWcTpq+Gs4oe5wYG4aWX3Vy2rs59JLm5Zc=; b=MZMbEjaNCLXUjEDHkeB1mWQKFwuK/jyJHzF39Pc2ZlVn/AXZi5mNxl5b9fLd3iOAjt 92iQ4JMRoNkEsYwsT5iH97vi9o66ASe999wyNCgHIxm1Cpqyvr52CL0DwYbJxtAvfVYx Dwgwr1zS7GCNTfF6SidE6MH1LYw4ZaeQVNiW64xYNKRcxVlnZiVRGp1P7tEtZ6e1FGHv DYCldnEtveUp4eDpn7tD7TpwzrIbz5qoZybUPzdinJT/D6Gb24M+ZIu/LU6lSw2hif29 biPs662hwRX9B6DCEjZLJf6a3c1vkfwBQPbmoiF7vPUD6ir4sPycGA2MpO8XwTX3l3sT bEbg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739194217; x=1739799017; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Y0kuY/qnmLWcTpq+Gs4oe5wYG4aWX3Vy2rs59JLm5Zc=; b=i9W3cXW89v5yEtpEH6J64ElvShiFI5ZP2qvoAIEAfO4k++EsVP7HPxEaW1F0Ka7w+0 0Bnu1zwxFjBkHG1JIUYx88F2mY1OSMem/Aup5hqqyB03NsK3TvkzIoi7xUXbtLjhYDRX JOqQy1g8JO+04dtAN7x5Zbg7C6hzO4dNclZw30jpERpa1LQC0bOy3cmhuBQCpAcnKHWI 4Ka3yUYPhdbhxWsB4Crw8yc67gu+OYOuySCNteWPRACLqfzigsGmopBJ6FbVl5UdfShB 92F6cEsNd1Iy4EAlyUP6pxuWvWU4ZZgFDfz+aWCAWIktImidnJFqwW2iXo/NGXSypQTM UILw== X-Forwarded-Encrypted: i=1; AJvYcCUjZcIWJRnik/kP+PEzjY6NfkONH1zA511L2wkdrdLCI+EQhMtz8FTmOhf9L23RFTzQxQBIcB8zoQoBIA==@vger.kernel.org, AJvYcCUmie4w87JpmwbqNsDdVPuZqJERkbwnGJyRDmDSQ7yWF/yKmL1QATf2M5GrOxI9yMdjsqym1YUumARNFufHOPQ=@vger.kernel.org, AJvYcCVCxkAGqNtSCUXtJ5O3tD9mIgvmmPenm+Z7dt1CCIFnJHooyS4oE2imvIVqsjk405dcME06IFbV8x8Yi7InoF3S@vger.kernel.org, AJvYcCVZNz4xNrJzFulQBGdFAQFiGr8GOxgz7gM+8xVztEj0wPQqj4AxktT0s7FsL9NuRQpnBBwFMPLZTV7ShOei@vger.kernel.org, AJvYcCVuMzQi4I1JflDazRSdxjDAdllCyC/+7Gt/Jfrd5dCY+rAFhy7NhfUuLFMBU354DULo53M=@vger.kernel.org, AJvYcCWeXavF7w4iKdRZyaSk31jtU/F3Jmuj2AeYzuekIvwBzod6e9eMEVYOKIkzgL/W7BKe9XRdp4dKM06S@vger.kernel.org, AJvYcCWrOKcQEFNZy5H79NSBvqGUXuWMxVK/ta+jOPD+RWzmlgkfznIglKZwR6A1832P3gB6shKG2K24ba+EWQ==@vger.kernel.org, AJvYcCXf3GOtaGR8TTovxp1VRiN6Sq2Wb/oaLxF2rKlwXlE8pE3VBR1A9qnieCf8WYJiifMgnFZ4xc9OSaWy@vger.kernel.org X-Gm-Message-State: AOJu0Ywm56sd4b+Olxnu3JE3ORpe+nfEj3z0b5LOAvd1PbUGfKJXCY4L iJtkeLHtR6tyv21/oOIB7aUgBK4TWobXTViE8P17Oyy5d1c2PLAAhAYgopPD X-Gm-Gg: ASbGncuy2GazpDX1qG9e98XjYbEZCNUvLYrOdCMz/1LIV6Zs19RRrZrG7/6yMsW5V1F /hEOpGpqDeobOepdbT+QUM4IzQ3y+W7u/j3u6Lh1tqXkdnPrB+m22ohd7S9KgnuYd6vsbFntTaC GsfBvgKD+wQC5Mo2JtHrO/lKo9yBsPaWtYi/Iis0N9pnj4kyohTwftgejjqq2b3+bVxKLqSKCZf r2zojv5nju/pby+37PduCG6dffBZM5Fvn2PNcDn2h52aW7nJbrUhIbrbiTvfz9M0Jn1dqz/huxQ Cw19sg== X-Google-Smtp-Source: AGHT+IEH5QCCl4lI0axSO2k1baOf7QV120615EUg7vMmek14klRWGmTSu58W64P2a3hO1mcauSS1MQ== X-Received: by 2002:a17:903:2309:b0:215:a04a:89d5 with SMTP id d9443c01a7336-21f4e1cf038mr233204165ad.2.1739194216829; Mon, 10 Feb 2025 05:30:16 -0800 (PST) Received: from ws.. ([103.167.140.11]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-21f3653af3bsm78799445ad.57.2025.02.10.05.30.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2025 05:30:16 -0800 (PST) From: Xiao Liang To: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, Kuniyuki Iwashima , Jakub Kicinski Cc: "David S. Miller" , David Ahern , Eric Dumazet , Paolo Abeni , Andrew Lunn , Simon Horman , Shuah Khan , Donald Hunter , Alexander Aring , Stefan Schmidt , Miquel Raynal , Steffen Klassert , Herbert Xu , linux-rdma@vger.kernel.org, linux-can@vger.kernel.org, osmocom-net-gprs@lists.osmocom.org, bpf@vger.kernel.org, linux-ppp@vger.kernel.org, wireguard@lists.zx2c4.com, linux-wireless@vger.kernel.org, b.a.t.m.a.n@lists.open-mesh.org, bridge@lists.linux.dev, linux-wpan@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v9 00/11] net: Improve netns handling in rtnetlink Date: Mon, 10 Feb 2025 21:29:51 +0800 Message-ID: <20250210133002.883422-1-shaw.leon@gmail.com> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This patch series includes some netns-related improvements and fixes for rtnetlink, to make link creation more intuitive: 1) Creating link in another net namespace doesn't conflict with link names in current one. 2) Refector rtnetlink link creation. Create link in target namespace directly. So that # ip link add netns ns1 link-netns ns2 tun0 type gre ... will create tun0 in ns1, rather than create it in ns2 and move to ns1. And don't conflict with another interface named "tun0" in current netns. Patch 01 avoids link name conflict in different netns. To achieve 2), there're mainly 3 steps: - Patch 02 packs newlink() parameters into a struct, including the original "src_net" along with more netns context. No semantic changes are introduced. - Patch 03 ~ 07 converts device drivers to use the explicit netns extracted from params. - Patch 08 ~ 09 removes the old netns parameter, and converts rtnetlink to create device in target netns directly. Patch 10 ~ 11 adds some tests for link name and link netns. BTW please note there're some issues found in current code: - In amt_newlink() drivers/net/amt.c: amt->net = net; ... amt->stream_dev = dev_get_by_index(net, ... Uses net, but amt_lookup_upper_dev() only searches in dev_net. So the AMT device may not be properly deleted if it's in a different netns from lower dev. - In lowpan_newlink() in net/ieee802154/6lowpan/core.c: wdev = dev_get_by_index(dev_net(ldev), nla_get_u32(tb[IFLA_LINK])); Looks for IFLA_LINK in dev_net, but in theory the ifindex is defined in link netns. And thanks to Kuniyuki for fixing related issues in gtp and pfcp: https://lore.kernel.org/netdev/20250110014754.33847-1-kuniyu@amazon.com/ --- v9: - Change the prototype of macvlan_common_newlink(). - Minor fixes of coding style and local variables. v8: link: https://lore.kernel.org/all/20250113143719.7948-1-shaw.leon@gmail.com/ - Move dev and ext_ack out from param struct. - Validate link_net and dev_net are identical for 6lowpan. v7: link: https://lore.kernel.org/all/20250104125732.17335-1-shaw.leon@gmail.com/ - Add selftest kconfig. - Remove a duplicated test of ip6gre. v6: link: https://lore.kernel.org/all/20241218130909.2173-1-shaw.leon@gmail.com/ - Split prototype, driver and rtnetlink changes. - Add more tests for link netns. - Fix IPv6 tunnel net overwriten in ndo_init(). - Reorder variable declarations. - Exclude a ip_tunnel-specific patch. v5: link: https://lore.kernel.org/all/20241209140151.231257-1-shaw.leon@gmail.com/ - Fix function doc in batman-adv. - Include peer_net in rtnl newlink parameters. v4: link: https://lore.kernel.org/all/20241118143244.1773-1-shaw.leon@gmail.com/ - Pack newlink() parameters to a single struct. - Use ynl async_msg_queue.empty() in selftest. v3: link: https://lore.kernel.org/all/20241113125715.150201-1-shaw.leon@gmail.com/ - Drop "netns_atomic" flag and module parameter. Add netns parameter to newlink() instead, and convert drivers accordingly. - Move python NetNSEnter helper to net selftest lib. v2: link: https://lore.kernel.org/all/20241107133004.7469-1-shaw.leon@gmail.com/ - Check NLM_F_EXCL to ensure only link creation is affected. - Add self tests for link name/ifindex conflict and notifications in different netns. - Changes in dummy driver and ynl in order to add the test case. v1: link: https://lore.kernel.org/all/20241023023146.372653-1-shaw.leon@gmail.com/ Xiao Liang (11): rtnetlink: Lookup device in target netns when creating link rtnetlink: Pack newlink() params into struct net: Use link netns in newlink() of rtnl_link_ops ieee802154: 6lowpan: Validate link netns in newlink() of rtnl_link_ops net: ip_tunnel: Use link netns in newlink() of rtnl_link_ops net: ipv6: Use link netns in newlink() of rtnl_link_ops net: xfrm: Use link netns in newlink() of rtnl_link_ops rtnetlink: Remove "net" from newlink params rtnetlink: Create link directly in target net namespace selftests: net: Add python context manager for netns entering selftests: net: Add test cases for link and peer netns drivers/infiniband/ulp/ipoib/ipoib_netlink.c | 9 +- drivers/net/amt.c | 11 +- drivers/net/bareudp.c | 9 +- drivers/net/bonding/bond_netlink.c | 6 +- drivers/net/can/dev/netlink.c | 4 +- drivers/net/can/vxcan.c | 7 +- .../ethernet/qualcomm/rmnet/rmnet_config.c | 9 +- drivers/net/geneve.c | 9 +- drivers/net/gtp.c | 10 +- drivers/net/ipvlan/ipvlan.h | 3 +- drivers/net/ipvlan/ipvlan_main.c | 8 +- drivers/net/ipvlan/ipvtap.c | 6 +- drivers/net/macsec.c | 9 +- drivers/net/macvlan.c | 21 +-- drivers/net/macvtap.c | 6 +- drivers/net/netkit.c | 14 +- drivers/net/pfcp.c | 9 +- drivers/net/ppp/ppp_generic.c | 9 +- drivers/net/team/team_core.c | 6 +- drivers/net/veth.c | 7 +- drivers/net/vrf.c | 5 +- drivers/net/vxlan/vxlan_core.c | 9 +- drivers/net/wireguard/device.c | 7 +- drivers/net/wireless/virtual/virt_wifi.c | 8 +- drivers/net/wwan/wwan_core.c | 16 +- include/linux/if_macvlan.h | 6 +- include/net/ip_tunnels.h | 5 +- include/net/rtnetlink.h | 40 ++++- net/8021q/vlan_netlink.c | 9 +- net/batman-adv/soft-interface.c | 9 +- net/bridge/br_netlink.c | 6 +- net/caif/chnl_net.c | 5 +- net/core/rtnetlink.c | 34 +++-- net/hsr/hsr_netlink.c | 12 +- net/ieee802154/6lowpan/core.c | 7 +- net/ipv4/ip_gre.c | 22 ++- net/ipv4/ip_tunnel.c | 10 +- net/ipv4/ip_vti.c | 9 +- net/ipv4/ipip.c | 9 +- net/ipv6/ip6_gre.c | 30 ++-- net/ipv6/ip6_tunnel.c | 19 ++- net/ipv6/ip6_vti.c | 15 +- net/ipv6/sit.c | 17 ++- net/xfrm/xfrm_interface_core.c | 15 +- tools/testing/selftests/net/Makefile | 1 + tools/testing/selftests/net/config | 5 + .../testing/selftests/net/lib/py/__init__.py | 2 +- tools/testing/selftests/net/lib/py/netns.py | 18 +++ tools/testing/selftests/net/link_netns.py | 141 ++++++++++++++++++ tools/testing/selftests/net/netns-name.sh | 10 ++ 50 files changed, 494 insertions(+), 179 deletions(-) create mode 100755 tools/testing/selftests/net/link_netns.py