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([103.167.140.11]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2ea81b0e2fasm1616926a91.52.2024.11.18.06.33.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2024 06:33:13 -0800 (PST) From: Xiao Liang To: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, Kuniyuki Iwashima , Jakub Kicinski , Donald Hunter Cc: "David S. Miller" , David Ahern , Eric Dumazet , Paolo Abeni , Ido Schimmel , Andrew Lunn , Simon Horman , Shuah Khan , Jiri Pirko , Hangbin Liu , 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 v4 0/5] net: Improve netns handling in RTNL and ip_tunnel Date: Mon, 18 Nov 2024 22:32:39 +0800 Message-ID: <20241118143244.1773-1-shaw.leon@gmail.com> X-Mailer: git-send-email 2.47.0 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org This patch series includes some netns-related improvements and fixes for RTNL and ip_tunnel, to make link creation more intuitive: - Creating link in another net namespace doesn't conflict with link names in current one. - Refector rtnetlink link creation. Create link in target namespace directly. Pass both source and link netns to drivers via newlink() callback. 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. --- v4: - 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 (5): net: ip_tunnel: Build flow in underlay net namespace rtnetlink: Lookup device in target netns when creating link rtnetlink: Decouple net namespaces in rtnl_newlink_create() selftests: net: Add python context manager for netns entering selftests: net: Add two test cases for link netns drivers/infiniband/ulp/ipoib/ipoib_netlink.c | 11 ++++-- drivers/net/amt.c | 13 ++++--- drivers/net/bareudp.c | 11 ++++-- drivers/net/bonding/bond_netlink.c | 8 ++-- drivers/net/can/dev/netlink.c | 4 +- drivers/net/can/vxcan.c | 11 ++++-- .../ethernet/qualcomm/rmnet/rmnet_config.c | 11 ++++-- drivers/net/geneve.c | 11 ++++-- drivers/net/gtp.c | 9 +++-- drivers/net/ipvlan/ipvlan.h | 4 +- drivers/net/ipvlan/ipvlan_main.c | 11 ++++-- drivers/net/ipvlan/ipvtap.c | 7 ++-- drivers/net/macsec.c | 11 ++++-- drivers/net/macvlan.c | 8 ++-- drivers/net/macvtap.c | 8 ++-- drivers/net/netkit.c | 11 ++++-- drivers/net/pfcp.c | 8 ++-- drivers/net/ppp/ppp_generic.c | 10 +++-- drivers/net/team/team_core.c | 7 ++-- drivers/net/veth.c | 11 ++++-- drivers/net/vrf.c | 7 ++-- drivers/net/vxlan/vxlan_core.c | 11 ++++-- drivers/net/wireguard/device.c | 8 ++-- drivers/net/wireless/virtual/virt_wifi.c | 10 +++-- drivers/net/wwan/wwan_core.c | 15 +++++-- include/net/ip_tunnels.h | 5 ++- include/net/rtnetlink.h | 34 +++++++++++++--- net/8021q/vlan_netlink.c | 11 ++++-- net/batman-adv/soft-interface.c | 8 ++-- net/bridge/br_netlink.c | 8 ++-- net/caif/chnl_net.c | 6 +-- net/core/rtnetlink.c | 29 +++++++++----- net/hsr/hsr_netlink.c | 14 ++++--- net/ieee802154/6lowpan/core.c | 9 +++-- net/ipv4/ip_gre.c | 27 ++++++++----- net/ipv4/ip_tunnel.c | 16 ++++---- net/ipv4/ip_vti.c | 10 +++-- net/ipv4/ipip.c | 10 +++-- net/ipv6/ip6_gre.c | 28 +++++++------ net/ipv6/ip6_tunnel.c | 16 ++++---- net/ipv6/ip6_vti.c | 15 ++++--- net/ipv6/sit.c | 16 ++++---- net/xfrm/xfrm_interface_core.c | 14 +++---- tools/testing/selftests/net/Makefile | 1 + .../testing/selftests/net/lib/py/__init__.py | 2 +- tools/testing/selftests/net/lib/py/netns.py | 18 +++++++++ tools/testing/selftests/net/netns-name.sh | 10 +++++ tools/testing/selftests/net/netns_atomic.py | 39 +++++++++++++++++++ 48 files changed, 377 insertions(+), 205 deletions(-) create mode 100755 tools/testing/selftests/net/netns_atomic.py