From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qt1-f201.google.com (mail-qt1-f201.google.com [209.85.160.201]) (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 3D9AF3A544D for ; Wed, 20 May 2026 10:32:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779273152; cv=none; b=c0XnGiFFVG25yeHHCF6u4BLEarm+RSjtNyTt/Cc3zLIOzpHfl+lywPb7PBvgtODFu8ZKUBB8e4MuHDO0+kI78lvMU4quYdDZp3Atx7lqeOHfaLS3J13INEbE6HO0I3yjpoe+dGwY+LEIFyif5buF6W4re4mYBvg5TSzGmmLqSqk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779273152; c=relaxed/simple; bh=EsuMteTS8wv1emfFeo7Evcv8TqjuK/axQXyFjKcgLWM=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=rTJPFfNxtGPxZJmziy+pDQAdRgqZ7FMMrX3ibbJmRNkKpoYvkelp+u8cp2JGzuhX5HwLrQLweeO3eDQtRvH0Gk5iapGXMDNMZjGv6MtFvJTVaBF09mbaHLU+hPZCfuc3rUW0CXsfOq/aB55m7YY4asHXL5fF/6gnRDTiQ8sgNLw= 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=jDn8UbTL; arc=none smtp.client-ip=209.85.160.201 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="jDn8UbTL" Received: by mail-qt1-f201.google.com with SMTP id d75a77b69052e-50fbc70cfbdso139976471cf.2 for ; Wed, 20 May 2026 03:32:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1779273149; x=1779877949; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=Ap5x+xrKtC09Ru67F9w90PyjG2arP/ZeCIIk8BQlDUk=; b=jDn8UbTLHkKo7AgBgtHU95rLbsgNP9OAjBmH20m/4+P7K8BNMv5BRkQmE49/EO+nFw MJSL8ryaTiHOeOnmOcejUnNKutB68TFMnoox/JGcMmax5fbXX0w4FYbPcMIaj5oouv2R b0cu7GawUKGhImfsOChpv7peQwAxGMvK9O+ziiilmC9hnsWkLP8rwISFcRdFl3LVmhYM EPIfxdmSCLLmJw90QhJ33ZGsYYuvgZTr51/B383iZOEFwPXnXpFHVXU0c1pTCfI9zOx/ 7zYnMRIjo6KXdf188cTiml9atNh4x/oMVBSHci6gIK5Cko1boCgB/bojdo1C5cG8yGf2 fPRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779273149; x=1779877949; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Ap5x+xrKtC09Ru67F9w90PyjG2arP/ZeCIIk8BQlDUk=; b=soCsvTs3LdSjELctNLmIOinm4C+DpiXDGfDMsLwFHvjMSU4IeEaWHCDCpodbZZKDbs +iBc7PHljj+PzdzUjNcHl9M2ZH/ev+0u0p1WJ4QiqUS/fy35jkfu9+zXYMjC+QFAZVd8 et8pkZArduLqaIX5E1oBneMxIvW5aBknTBnI1ICOM8321W8OwaD78phEX5CJ5PNHwPrU Z5znlAxGwlEROwLAHwK+v9DDAU6duX1g25kPKgrjSfVjDhQFejKGtNmXY2g9tGstJZDs 4u4zGtAvCnENAaBhzC9mysuBSshX1DXt9+uzlFW67CPdC2xqEsA8f+G5cZdQE36khEsM Rm/Q== X-Forwarded-Encrypted: i=1; AFNElJ9G4yA4A2n1a3iyO3IhkYNJKae4t46ywt8ilxfb5CTsOxo+mGl+AFYffOt4VnU+6NTFCKuIXyk=@vger.kernel.org X-Gm-Message-State: AOJu0YxsK6deKYYVIqzZja+z74+nSb2Ba4B5ie2ksFYmfxYsEgCNgYzi IeAG/fOySghsvXf7dlMvi6/gt2WOLpEv4on+76XbaqlL5ycdPQPeDHaGjGCc6qec4waq/M3i0LP yEEQs0en/0YXACQ== X-Received: from qvbfn11.prod.google.com ([2002:ad4:5d6b:0:b0:8c4:b10a:1250]) (user=edumazet job=prod-delivery.src-stubby-dispatcher) by 2002:ac8:584d:0:b0:50d:91e3:b668 with SMTP id d75a77b69052e-5165a051e3cmr299120561cf.20.1779273148347; Wed, 20 May 2026 03:32:28 -0700 (PDT) Date: Wed, 20 May 2026 10:32:24 +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 2.54.0.631.ge1b05301d1-goog Message-ID: <20260520103227.1133277-1-edumazet@google.com> Subject: [PATCH v3 net-next 0/3] rtnetlink: RTNL avoidance in rtnl_getlink() From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski , Paolo Abeni Cc: Simon Horman , Kuniyuki Iwashima , David Ahern , netdev@vger.kernel.org, eric.dumazet@gmail.com, Eric Dumazet Content-Type: text/plain; charset="UTF-8" Many shell scripts invoke iproute2 commands specifying a device by its name. This series improves their performance avoiding RTNL acquisition for their (repeated) name->index conversion. v3: insert patch 2/3 in the series (Jakub reported a KASAN splat) Eric Dumazet (3): rtnetlink: use nla_nest_end_safe() in rtnl_fill_prop_list() net: defer netdev_name_node_alt_flush() call to netdev_run_todo() rtnetlink: do not acquire RTNL for RTM_GETLINK with RTEXT_FILTER_NAME_ONLY net/core/dev.c | 4 +-- net/core/rtnetlink.c | 86 ++++++++++++++++++++++++++++++-------------- 2 files changed, 61 insertions(+), 29 deletions(-) -- 2.54.0.631.ge1b05301d1-goog