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([2001:67c:2fbc:1:2b1b:6df9:ad3c:c183]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5dbcfb8ff37sm2461596a12.72.2025.01.21.15.25.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Jan 2025 15:25:53 -0800 (PST) Message-ID: <10bb8eb7-fdcc-4ab6-8ddb-52491933659e@openvpn.net> Date: Wed, 22 Jan 2025 00:26:50 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v18 20/25] ovpn: implement peer add/get/dump/delete via netlink From: Antonio Quartulli To: Sabrina Dubroca Cc: netdev@vger.kernel.org, Eric Dumazet , Jakub Kicinski , Paolo Abeni , Donald Hunter , Shuah Khan , ryazanov.s.a@gmail.com, Andrew Lunn , Simon Horman , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Xiao Liang References: <20250113-b4-ovpn-v18-0-1f00db9c2bd6@openvpn.net> <20250113-b4-ovpn-v18-20-1f00db9c2bd6@openvpn.net> <30c50783-096b-4114-aa55-c3edbeb38d49@openvpn.net> Content-Language: en-US Autocrypt: addr=antonio@openvpn.net; keydata= xsFNBFN3k+ABEADEvXdJZVUfqxGOKByfkExNpKzFzAwHYjhOb3MTlzSLlVKLRIHxe/Etj13I X6tcViNYiIiJxmeHAH7FUj/yAISW56lynAEt7OdkGpZf3HGXRQz1Xi0PWuUINa4QW+ipaKmv voR4b1wZQ9cZ787KLmu10VF1duHW/IewDx9GUQIzChqQVI3lSHRCo90Z/NQ75ZL/rbR3UHB+ EWLIh8Lz1cdE47VaVyX6f0yr3Itx0ZuyIWPrctlHwV5bUdA4JnyY3QvJh4yJPYh9I69HZWsj qplU2WxEfM6+OlaM9iKOUhVxjpkFXheD57EGdVkuG0YhizVF4p9MKGB42D70pfS3EiYdTaKf WzbiFUunOHLJ4hyAi75d4ugxU02DsUjw/0t0kfHtj2V0x1169Hp/NTW1jkqgPWtIsjn+dkde dG9mXk5QrvbpihgpcmNbtloSdkRZ02lsxkUzpG8U64X8WK6LuRz7BZ7p5t/WzaR/hCdOiQCG RNup2UTNDrZpWxpwadXMnJsyJcVX4BAKaWGsm5IQyXXBUdguHVa7To/JIBlhjlKackKWoBnI Ojl8VQhVLcD551iJ61w4aQH6bHxdTjz65MT2OrW/mFZbtIwWSeif6axrYpVCyERIDEKrX5AV rOmGEaUGsCd16FueoaM2Hf96BH3SI3/q2w+g058RedLOZVZtyQARAQABzSdBbnRvbmlvIFF1 YXJ0dWxsaSA8YW50b25pb0BvcGVudnBuLm5ldD7Cwa0EEwEIAFcCGwMFCwkIBwMFFQoJCAsF FgIDAQACHgECF4AFCRWQ2TIWIQTKvaEoIBfCZyGYhcdI8My2j1nRTAUCYRUquBgYaGtwczov L2tleXMub3BlbnBncC5vcmcACgkQSPDMto9Z0UzmcxAAjzLeD47We0R4A/14oDKlZxXO0mKL fCzaWFsdhQCDhZkgxoHkYRektK2cEOh4Vd+CnfDcPs/iZ1i2+Zl+va79s4fcUhRReuwi7VCg 7nHiYSNC7qZo84Wzjz3RoGYyJ6MKLRn3zqAxUtFECoS074/JX1sLG0Z3hi19MBmJ/teM84GY IbSvRwZu+VkJgIvZonFZjbwF7XyoSIiEJWQC+AKvwtEBNoVOMuH0tZsgqcgMqGs6lLn66RK4 tMV1aNeX6R+dGSiu11i+9pm7sw8tAmsfu3kQpyk4SB3AJ0jtXrQRESFa1+iemJtt+RaSE5LK 5sGLAO+oN+DlE0mRNDQowS6q/GBhPCjjbTMcMfRoWPCpHZZfKpv5iefXnZ/xVj7ugYdV2T7z r6VL2BRPNvvkgbLZgIlkWyfxRnGh683h4vTqRqTb1wka5pmyBNAv7vCgqrwfvaV1m7J9O4B5 PuRjYRelmCygQBTXFeJAVJvuh2efFknMh41R01PP2ulXAQuVYEztq3t3Ycw6+HeqjbeqTF8C DboqYeIM18HgkOqRrn3VuwnKFNdzyBmgYh/zZx/dJ3yWQi/kfhR6TawAwz6GdbQGiu5fsx5t u14WBxmzNf9tXK7hnXcI24Z1z6e5jG6U2Swtmi8sGSh6fqV4dBKmhobEoS7Xl496JN2NKuaX jeWsF2rOwE0EZmhJFwEIAOAWiIj1EYkbikxXSSP3AazkI+Y/ICzdFDmiXXrYnf/mYEzORB0K vqNRQOdLyjbLKPQwSjYEt1uqwKaD1LRLbA7FpktAShDK4yIljkxhvDI8semfQ5WE/1Jj/I/Q U+4VXhkd6UvvpyQt/LiWvyAfvExPEvhiMnsg2zkQbBQ/M4Ns7ck0zQ4BTAVzW/GqoT2z03mg p1FhxkfzHMKPQ6ImEpuY5cZTQwrBUgWif6HzCtQJL7Ipa2fFnDaIHQeiJG0RXl/g9x3YlwWG sxOFrpWWsh6GI0Mo2W2nkinEIts48+wNDBCMcMlOaMYpyAI7fT5ziDuG2CBA060ZT7qqdl6b aXUAEQEAAcLBfAQYAQgAJhYhBMq9oSggF8JnIZiFx0jwzLaPWdFMBQJmaEkXAhsMBQkB4TOA AAoJEEjwzLaPWdFMbRUP/0t5FrjF8KY6uCU4Tx029NYKDN9zJr0CVwSGsNfC8WWonKs66QE1 pd6xBVoBzu5InFRWa2ed6d6vBw2BaJHC0aMg3iwwBbEgPn4Jx89QfczFMJvFm+MNc2DLDrqN zaQSqBzQ5SvUjxh8lQ+iqAhi0MPv4e2YbXD0ROyO+ITRgQVZBVXoPm4IJGYWgmVmxP34oUQh BM7ipfCVbcOFU5OPhd9/jn1BCHzir+/i0fY2Z/aexMYHwXUMha/itvsBHGcIEYKk7PL9FEfs wlbq+vWoCtUTUc0AjDgB76AcUVxxJtxxpyvES9aFxWD7Qc+dnGJnfxVJI0zbN2b37fX138Bf 27NuKpokv0sBnNEtsD7TY4gBz4QhvRNSBli0E5bGUbkM31rh4Iz21Qk0cCwR9D/vwQVsgPvG ioRqhvFWtLsEt/xKolOmUWA/jP0p8wnQ+3jY6a/DJ+o5LnVFzFqbK3fSojKbfr3bY33iZTSj DX9A4BcohRyqhnpNYyHL36gaOnNnOc+uXFCdoQkI531hXjzIsVs2OlfRufuDrWwAv+em2uOT BnRX9nFx9kPSO42TkFK55Dr5EDeBO3v33recscuB8VVN5xvh0GV57Qre+9sJrEq7Es9W609a +M0yRJWJEjFnMa/jsGZ+QyLD5QTL6SGuZ9gKI3W1SfFZOzV7hHsxPTZ6 Organization: OpenVPN Inc. In-Reply-To: <30c50783-096b-4114-aa55-c3edbeb38d49@openvpn.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 20/01/2025 15:52, Antonio Quartulli wrote: > On 17/01/2025 12:48, Sabrina Dubroca wrote: > [...] >> -------- 8< -------- >> >> diff --git a/drivers/net/ovpn/netlink.c b/drivers/net/ovpn/netlink.c >> index 72357bb5f30b..19aa4ee6d468 100644 >> --- a/drivers/net/ovpn/netlink.c >> +++ b/drivers/net/ovpn/netlink.c >> @@ -733,6 +733,9 @@ int ovpn_nl_peer_del_doit(struct sk_buff *skb, >> struct genl_info *info) >>       netdev_dbg(ovpn->dev, "del peer %u\n", peer->id); >>       ret = ovpn_peer_del(peer, OVPN_DEL_PEER_REASON_USERSPACE); >> +    if (ret >= 0 && peer->sock) >> +        wait_for_completion(&peer->sock_detach); >> + >>       ovpn_peer_put(peer); >>       return ret; >> diff --git a/drivers/net/ovpn/peer.c b/drivers/net/ovpn/peer.c >> index b032390047fe..6120521d0c32 100644 >> --- a/drivers/net/ovpn/peer.c >> +++ b/drivers/net/ovpn/peer.c >> @@ -92,6 +92,7 @@ struct ovpn_peer *ovpn_peer_new(struct ovpn_priv >> *ovpn, u32 id) >>       ovpn_peer_stats_init(&peer->vpn_stats); >>       ovpn_peer_stats_init(&peer->link_stats); >>       INIT_WORK(&peer->keepalive_work, ovpn_peer_keepalive_send); >> +    init_completion(&peer->sock_detach); >>       ret = dst_cache_init(&peer->dst_cache, GFP_KERNEL); >>       if (ret < 0) { >> diff --git a/drivers/net/ovpn/peer.h b/drivers/net/ovpn/peer.h >> index 7a062cc5a5a4..8c54bf5709ef 100644 >> --- a/drivers/net/ovpn/peer.h >> +++ b/drivers/net/ovpn/peer.h >> @@ -112,6 +112,7 @@ struct ovpn_peer { >>       struct rcu_head rcu; >>       struct work_struct remove_work; >>       struct work_struct keepalive_work; >> +    struct completion sock_detach; >>   }; >>   /** >> diff --git a/drivers/net/ovpn/socket.c b/drivers/net/ovpn/socket.c >> index a5c3bc834a35..7cefac42c3be 100644 >> --- a/drivers/net/ovpn/socket.c >> +++ b/drivers/net/ovpn/socket.c >> @@ -31,6 +31,8 @@ static void ovpn_socket_release_kref(struct kref *kref) >>       sockfd_put(sock->sock); >>       kfree_rcu(sock, rcu); >> + >> +    complete(&sock->peer->sock_detach); I am moving this line to ovpn_socket_put(), right after kref_put() so that every peer going through the socket release will get their complete() invoked. If the peer happens to be the last one owning the socket, kref_put() will first do the detach and only then complete() gets called. This requires ovpn_socket_release/put() to take the peer as argument, but that's ok. This way we should achieve what we needed. Regards, -- Antonio Quartulli OpenVPN Inc.