From patchwork Thu Feb 22 10:50:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Dumazet X-Patchwork-Id: 13567039 Received: from mail-yb1-f201.google.com (mail-yb1-f201.google.com [209.85.219.201]) (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 717583FB2E for ; Thu, 22 Feb 2024 10:50:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708599026; cv=none; b=a/8H4Ft7JsNLeFNEZ1ZJvCUcMxZ9H+X6ZZ76l99hb//kV13cwjNMiEEWWu2/0DRnBk1QqSkt6DjKjVr1HydPwbj/3/jQj2V25FAHn4RfIeS+wVok7Q9UZRd17M+raMVdclNXi6KU7vuWMUbu85qOr1fpBbOTTXUNlErZ8licv40= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708599026; c=relaxed/simple; bh=wbrG0QT4aXp7xUnKeM8twR1WKmTe/6sfzfRf36QYyvA=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=mHZROfAjMV6dJsBGZQlTlcbehv/MScO+lhdN2eApT2xV7ZeTsd9sJyqdl51p6mDXuqH6lm8PwnlmPrzMyyr5tF6vqolGbLuRn0R6kzvZBDt0B9ZEMbUzXjYB8jX+PeYJdwNP1ZnKNCgot7ve0psoZewxy+1wSKsJx331KqW+gz0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--edumazet.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=yf6YNEMR; arc=none smtp.client-ip=209.85.219.201 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--edumazet.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="yf6YNEMR" Received: by mail-yb1-f201.google.com with SMTP id 3f1490d57ef6-dcd94cc48a1so13524813276.3 for ; Thu, 22 Feb 2024 02:50:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1708599023; x=1709203823; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=xYm3V2Z4GOBVSKCpv9wKIBpXwW0wEyBg3yOVPQbP2C0=; b=yf6YNEMRsuszdReDDNY2ukzEgqV2yYybIFJBXHzKsGaTSSy7Djo3PN5VXmG0jWygPc gAqx5iNS+yHSYw0aLdfYNWhxSjh72tAC6Bb+02FlAxRCX4PozLX6VD/GgMAK1CMm+p1T Vt0um6Gz9b4ZKnVecwOpnykMotBUzmx0GMDaZOHNxVar2zrlSLIsGWoTNeYHIuJ0G1ks QlH7mad9G738tIeylsEViSF0d1X3A29pYDSmAubiWOLX0io9KMJ7Gs0v19z61yFhW89P sUb/s0tF4IklJaQm03HABwMZ2dLN5KwJVdva4AJIqnc5gATx1nmNcH82AGuvLrhYNdVS JltQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708599023; x=1709203823; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=xYm3V2Z4GOBVSKCpv9wKIBpXwW0wEyBg3yOVPQbP2C0=; b=Jkufazbx3a9x4FJ11ujp/CWYe14rC0GAkOU9qXoyfX9CSlq+eTdEMcWlhyIeeRa8n+ ofrwAtBTWE21FZ0DAlXrXoZVS5yf2fTg9Fl62I8mJ0oVfkVMfwgBiSOuG8zQgV7g2jdZ xe5XgcxzPwKNBQvdlAu9CR4rRl6/mxbVWjpp758hhq22+DXv1GeEZmeMXsrQiVVJzc4K G0WI3jjrFrKCacjs8h0BKXH9LI5FBd4/niMdo/48j52d9+oto48gvPde2McpaED3w0Ch pzRvUQUZ3ezmNqBVgGHjvXEX82a8jpja0MBhudNhvZsOA1WDVc0VwoXpR048mZPSt8sc lHhw== X-Gm-Message-State: AOJu0YzI6z7LKf0a6oNB3VMnEXL8m1t3Y6DT6M4f/UP374OtiZR7r04U THV6+UH6yBrCpiRhtGaLkjVMVIYPCewPOhwHQYO/0QjcNCgV91TQPe/RdmZ9fhfK1M81eyl9J23 4OrmGEUVMBQ== X-Google-Smtp-Source: AGHT+IHCNedpPnRctZxlXtZ+3JyvRmQtXFvGHrLqrfQlFna7+TtOR8E5K5clCmeI65nrneiB/R8q9z++5c44bg== X-Received: from edumazet1.c.googlers.com ([fda3:e722:ac3:cc00:2b:7d90:c0a8:395a]) (user=edumazet job=sendgmr) by 2002:a05:6902:70b:b0:dcd:3172:7265 with SMTP id k11-20020a056902070b00b00dcd31727265mr511407ybt.8.1708599023469; Thu, 22 Feb 2024 02:50:23 -0800 (PST) Date: Thu, 22 Feb 2024 10:50:07 +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 2.44.0.rc1.240.g4c46232300-goog Message-ID: <20240222105021.1943116-1-edumazet@google.com> Subject: [PATCH v2 net-next 00/14] rtnetlink: reduce RTNL pressure for dumps From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski , Paolo Abeni Cc: netdev@vger.kernel.org, Ido Schimmel , Jiri Pirko , eric.dumazet@gmail.com, Eric Dumazet X-Patchwork-Delegate: kuba@kernel.org This series restarts the conversion of rtnl dump operations to RCU protection, instead of requiring RTNL. In this new attempt (prior one failed in 2011), I chose to allow a gradual conversion of selected operations. After this series, "ip -6 addr" and "ip -4 ro" no longer need to acquire RTNL. I refrained from changing inet_dump_ifaddr() and inet6_dump_addr() to avoid merge conflicts because of two fixes in net tree. I also started the work for "ip link" future conversion. v2: rtnl_fill_link_ifmap() always emit IFLA_MAP (Jiri Pirko) Added "nexthop: allow nexthop_mpath_fill_node() to be called without RTNL" to avoid a lockdep splat (Ido Schimmel) Eric Dumazet (14): rtnetlink: prepare nla_put_iflink() to run under RCU ipv6: prepare inet6_fill_ifla6_attrs() for RCU ipv6: prepare inet6_fill_ifinfo() for RCU protection ipv6: use xarray iterator to implement inet6_dump_ifinfo() netlink: fix netlink_diag_dump() return value netlink: hold nlk->cb_mutex longer in __netlink_dump_start() rtnetlink: change nlk->cb_mutex role rtnetlink: add RTNL_FLAG_DUMP_UNLOCKED flag ipv6: switch inet6_dump_ifinfo() to RCU protection inet: allow ip_valid_fib_dump_req() to be called with RTNL or RCU nexthop: allow nexthop_mpath_fill_node() to be called without RTNL inet: switch inet_dump_fib() to RCU protection rtnetlink: make rtnl_fill_link_ifmap() RCU ready rtnetlink: provide RCU protection to rtnl_fill_prop_list() drivers/infiniband/ulp/ipoib/ipoib_main.c | 4 +- drivers/net/can/vxcan.c | 2 +- .../net/ethernet/qualcomm/rmnet/rmnet_vnd.c | 2 +- drivers/net/ipvlan/ipvlan_main.c | 2 +- drivers/net/macsec.c | 2 +- drivers/net/macvlan.c | 2 +- drivers/net/netkit.c | 2 +- drivers/net/veth.c | 2 +- drivers/net/wireless/virtual/virt_wifi.c | 2 +- include/linux/netdevice.h | 6 +- include/linux/netlink.h | 2 + include/net/ip_fib.h | 1 + include/net/nexthop.h | 2 +- include/net/rtnetlink.h | 1 + net/8021q/vlan_dev.c | 4 +- net/core/dev.c | 6 +- net/core/rtnetlink.c | 36 +-- net/dsa/user.c | 2 +- net/ieee802154/6lowpan/core.c | 2 +- net/ipv4/fib_frontend.c | 50 ++-- net/ipv4/fib_trie.c | 4 +- net/ipv4/ipmr.c | 4 +- net/ipv6/addrconf.c | 222 +++++++++--------- net/ipv6/ip6_fib.c | 7 +- net/ipv6/ip6_tunnel.c | 2 +- net/ipv6/ip6mr.c | 4 +- net/ipv6/ndisc.c | 2 +- net/mpls/af_mpls.c | 4 +- net/netlink/af_netlink.c | 46 ++-- net/netlink/af_netlink.h | 5 +- net/netlink/diag.c | 2 +- net/xfrm/xfrm_interface_core.c | 2 +- 32 files changed, 238 insertions(+), 198 deletions(-)