From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 2BF0B33A9EB for ; Thu, 26 Feb 2026 02:36:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772073402; cv=none; b=K9LeipQzsJX0AFGVpfrp2fbw5GOgiVuzyk1KBE7CNNbnedeCtrZi2PmDBIjA/nw/urNTHIJjuvUP+rYcTpkjiDxIbIkKZBmnqW4skkGbNuLghXdIrDOUALL58amHAptLYpNx1LtX6srKDb6yuQC1/95EfJ08ljv6Ho/Andc8CUY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772073402; c=relaxed/simple; bh=F6JrlEUA/ex16vgomKUWvsE41UicPaiHRhZ0UNj0y14=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=CLRHtZd58/jBaIdnKEGD3pgQjQ9B3VRf68/kcoIuh4Obsva9XdAj9BSctJsaRLmum0+fk7NZdEA+srzGddjdePWcKtXU+8HQEyrOZUg9qeY/Szu3eSQUc4N/npLHtnFbeMoJNXq9N9OFVEvQ9hmCOt/nMcWKiv44kdjyUE9zKW8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--kuniyu.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=mtgLophP; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--kuniyu.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="mtgLophP" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-358e79b4ca6so193928a91.1 for ; Wed, 25 Feb 2026 18:36:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1772073400; x=1772678200; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=p9LWcr88rL6Xx3Q4WbGZrFQtWtigw101MW2rZpRS6HY=; b=mtgLophP4f2gQdz8jNEmILuYwh3kun5U2R7bffilf6Je4SJ+oZNppGJVjmBc9DXMdY xXG8BPMKyLjGjFTPxCN9NF6vYuYoNl9n0PlUbXqxz3kmkmCnYJTWDkJiqpyyBs6Lgw0e +XMUcKsOrXYbconsk5LbgbByHK8L2S7Oo/CEcXddLIjGN8NvR6YeGzQDU8ziuvN544Xy ORTps+xY65YI9Ae/ffROVNqDM7ykzISiVKUfqEoFb8j0o0XNzH7mKOJyn0jJ7haYtujv amOX1j+npHYY1DnGpsJjwYx+mofyZIi1+MXcEFXgO8y9E6Fpy4yofGu/FTI5i5unmqSQ 2oCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772073400; x=1772678200; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=p9LWcr88rL6Xx3Q4WbGZrFQtWtigw101MW2rZpRS6HY=; b=fJGg7Q4JM0wBL3l95MYHCWo9/erSlOrztWLdRo6omAqUtfjtropepYTssG5mqfSBML BF723MK6TVMS/iBjBVF7bCHJ8zWw3OXOXw9QXBawIclJMfsbRIlgKXY19AIdrqIXeKjP mYSgw4sjxFgZ6iFPDyAdL5B161MhaxZVE38NwO0iAWA+9dxJ6jqf3/yrGVSQZzXSCND4 L9GmNC9PUKsceE5s57rrXzxmYV61eDgbxT6lM8voNXV1Ze9eo1645lAfjgZvIi3c6twv DDF+zgwbnZvwbKOaargmflHNrtO+lU/dujLCMJrHm2CFmyxRx6/WQJSdAAAdzQfyoDZB ZXcw== X-Forwarded-Encrypted: i=1; AJvYcCWWX87XiCHTCgBmyvQop6ZJ2y4Hit2Kx9JL4aUNU8wX30xRBmjRbVqDMGgkYp9IM6SHdq9ZOzA=@vger.kernel.org X-Gm-Message-State: AOJu0YzcmfrTc+ItcajPD7/dsiFRqnfWy4C/LID5/nxyXWIyAAIJlp4d gh84w4K14vmGEFuqyvQf0XUcSgyIj10uzUJZHlZRyeX5+cy4qm2e/y0M0cno7NaOfmcy8zfnoq9 oKD4E4Q== X-Received: from pjblx14.prod.google.com ([2002:a17:90b:4b0e:b0:34a:c039:1428]) (user=kuniyu job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:39cc:b0:33b:a906:e40 with SMTP id 98e67ed59e1d1-35928a38a51mr2281058a91.2.1772073400348; Wed, 25 Feb 2026 18:36:40 -0800 (PST) Date: Thu, 26 Feb 2026 02:35:12 +0000 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.53.0.414.gf7e9f6c205-goog Message-ID: <20260226023637.1335854-1-kuniyu@google.com> Subject: [PATCH v1 net-next 00/15] ipmr: No RTNL for RTNL_FAMILY_IPMR rtnetlink. From: Kuniyuki Iwashima To: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Simon Horman , Kuniyuki Iwashima , Kuniyuki Iwashima , netdev@vger.kernel.org Content-Type: text/plain; charset="UTF-8" This series removes RTNL from ipmr rtnetlink handlers. After this series, there are a few RTNL left in net/ipv4/ipmr.c and such users will be converted to per-netns RTNL in another series. Patch 1 adds a selftest to exercise most? of the RTNL paths in net/ipv4/ipmr.c Patch 2 - 6 converts RTM_GETLINK / RTM_GETROUTE handlers to RCU. Patch 7 - 9 converts ->exit_batch() to ->exit_rtnl() to save one RTNL in cleanup_net(). Patch 10 - 11 removes unnecessary RTNL during setup_net() failure. Patch 12 is a random cleanup. Patch 13 - 15 drops RTNL for RTM_NEWROUTE and RTM_DELROUTE. Kuniyuki Iwashima (15): selftest: net: Add basic functionality tests for ipmr. ipmr: Annotate access to mrt->mroute_do_{pim,assert,wrvifwhole}. ipmr: Convert ipmr_rtm_dumplink() to RCU. ipmr: Use MAXVIFS in mroute_msgsize(). ipmr: Convert ipmr_rtm_getroute() to RCU. ipmr: Convert ipmr_rtm_dumproute() to RCU. ipmr: Move unregister_netdevice_many() out of mroute_clean_tables(). ipmr: Move unregister_netdevice_many() out of ipmr_free_table(). ipmr: Convert ipmr_net_exit_batch() to ->exit_rtnl(). ipmr: Remove RTNL in ipmr_rules_init() and ipmr_net_init(). ipmr: Call fib_rules_unregister() without RTNL. ipmr: Define net->ipv4.{ipmr_notifier_ops,ipmr_seq} under CONFIG_IP_MROUTE. ipmr/ip6mr: Convert net->ipv[46].ipmr_seq to atomic_t. ipmr: Add dedicated mutex for mrt->{mfc_hash,mfc_cache_list}. ipmr: Don't hold RTNL for ipmr_rtm_route(). include/linux/mroute_base.h | 9 +- include/net/netns/ipv4.h | 6 +- include/net/netns/ipv6.h | 2 +- net/ipv4/ipmr.c | 257 ++++++---- net/ipv4/ipmr_base.c | 4 +- net/ipv6/ip6mr.c | 4 +- .../testing/selftests/net/forwarding/Makefile | 4 + tools/testing/selftests/net/forwarding/ipmr.c | 455 ++++++++++++++++++ 8 files changed, 630 insertions(+), 111 deletions(-) create mode 100644 tools/testing/selftests/net/forwarding/ipmr.c -- 2.53.0.414.gf7e9f6c205-goog