From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B0D843770B; Mon, 25 May 2026 12:38:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779712739; cv=none; b=dfc9uF+q/c2QOChx1u8bZENaRbvgIYk6s46JRoZRsPcMhYkp760tqNZS00ui0+XryZ9Yqsd1ryQXmV2ItGXS2jL5g3jm5+Cf8F8avhflTHMkMvSMHu3IgV7YKNAU68hgT3mxZIy9I8R4bwyR+Tf9Nc0O+GWMXtkb+AKJDjr/3k0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779712739; c=relaxed/simple; bh=qJevWjhUpwFMhmq63XR9DqZRc+HAf2aq6b3ndw1s8cQ=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=O3d+QQiuTBpxEKwhD3hh7XgBW5m4ekD4pttzkE6yKkoC/HnCkeu7uwaF9Wz90tl9L/uju2JyvCtguWdpBOPeD6rPSB7R3BUSaQF1QZmTSUg9oySBk73yW0+yr7Cwp0wj4iozAQgBLJBgQHsJqiHEHX2rfHJy4I+mx352ZLdqVhU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kuk7YWnU; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kuk7YWnU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66F291F00A3A; Mon, 25 May 2026 12:38:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779712738; bh=8lgb9Ngn5FdzHWyrcZVupSqGIGO/Ib2PndiFN45dwAo=; h=From:Subject:Date:To:Cc; b=kuk7YWnUeM/nCIXwrG2F9OmYPh0gFcDusHjnCddvMKoBkFXoa4ij/AI8LM3/xX56y kHMNq4j2FiYH4p9Fi/LGqTWand4e9je6rT2BnnFyyhDCJnZMPhCUFeeIzAkjeMTOi1 14/squkc6yNk398ncpb2wiT4YhUDKD7T4c1Lh7G2PSZX6StrTwrv8bbtkiNKXQ1DZk /E6Up/bI5jSJC7zqpk2iKIVVbu/0Zs0VD1+lhjwoDtUhnYjfKIxUZFwVwgEqAw19wB V18Cm468n/52EBn4XEyvpsd7OIqV8w7Xt4PKC/6qAioQwDAZTI49/jDwIHECZq5pvQ nwntsdkq3TV1A== From: Jeff Layton Subject: [PATCH v2 0/4] nfsd/sunrpc: convert nfsstat server-side interfaces to use netlink Date: Mon, 25 May 2026 08:38:46 -0400 Message-Id: <20260525-exportd-netlink-v2-0-40003fed450c@kernel.org> Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/3WNQQqDMBBFryKzbopJSMCueo/ioiajDkoikxAs4 t2buu/yPfjvH5CQCRM8mgMYCyWKoYK6NeDmd5hQkK8MqlW21dIK3LfI2YuAeaWwCOm6cTDKaIs a6mpjHGm/iq++8kwpR/5cB0X+7P9WkaIVVirjnVVDZ8xzQQ643iNP0J/n+QVmXzhKrwAAAA== X-Change-ID: 20260316-exportd-netlink-1c9fb52536e3 To: Chuck Lever , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: Trond Myklebust , Anna Schumaker , Steve Dickson , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=2732; i=jlayton@kernel.org; h=from:subject:message-id; bh=qJevWjhUpwFMhmq63XR9DqZRc+HAf2aq6b3ndw1s8cQ=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBqFELg+qRtwtIxgosv+Rm0xXn9r9+NrXdVuHfTK 8Lpl/Sk7fOJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCahRC4AAKCRAADmhBGVaC FfqKD/93kQw9x2K3LTfPuvjkZjWjKvUaWS0qPB8DSb7RVzZwhBkkhCiADQzqf1O13TcTHaba8Hu 5WW04yuoC+TaADDnSxmUysONVNraWJVAac9kjRgvxoNyBqIbkLLkvu3xHzAY6W9sOuuqgsy/ywg HDqDGXhWZI6UXpCDEfaPvb6BJ5CDwuAKGYQmmQ4JopTeBjiRcZUkHtuGnvpDKvOSfvI7oVqmvcm H1wk96jXbn7swbDxM4w8wZ4SAnDyv9fyDjpx9vgM1mEqNWjroUummtL511MiSrQEgdV1WGfga0D la5lJxEWJoLJK5XPklJsc8fkJowfosqogMVbUvQAjoFojvYtvSNQ4mb5rVO0AAQx26U/R7rOQb2 e0uxmiDEjllk6rcLS4TPPZhSOzjaAJrbrwB7eo8L5gOHBWMg97C2m/9PogCfyzfgFB0/5IDdtxl rKLIZJ8HlkYZtYG1RwFt7gLW1nt/wHBydx9wJCrfBXwUdr+licxTV8QOQyz6IiQdiqafwZ0ghMv +Dc47Pt2hzTtQusDjDE/0Y6CGRiNTaXXrwdqfVWGsVldGe0WOEOhchjYHDlz32xU0/XtHipcqJQ aQqu3NT6DJcTfJPcyMYDOyeEYRv79KDQfGxnn+0Q6kMO87Edt4kbPpZKjBokUZ7uMAYhW1afIcC OKDUHmKOQHQXq9g== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 The nfsstat tool currently scrapes /proc/net/rpc/nfsd for server statistics. This procfs interface has several limitations: the counters are global (not network-namespace-aware), the format is fragile to parse, and it cannot be extended without breaking existing parsers. This series adds per-network-namespace procedure call counts to the sunrpc layer and exposes them through a new netlink handler in the nfsd generic netlink family, allowing nfsstat to retrieve server statistics via netlink with a procfs fallback for older kernels. Patch 1 adds per-netns per-procedure percpu call count arrays to struct svc_stat, allocated alongside the nfsd_net lifecycle. Patch 2 switches svc_seq_show() to read from the per-netns counters, making /proc/net/rpc/nfsd namespace-aware. Note that this is a behavior change, but I think it's a desirable one. Patch 3 implements the server-stats-get netlink dump handler, streaming reply-cache, filehandle, IO, network, and RPC statistics plus per-version and per-operation procedure counts. Patch 4 removes the now-unused global svc_version vs_count percpu arrays from nfsd, lockd, and the NFS client callback service. I'll also be sending an nfs-utils patch to convert nfsstat to use the new interfaces. Signed-off-by: Jeff Layton --- Jeff Layton (4): sunrpc: add per-netns per-procedure call counts to svc_stat sunrpc: use per-net counts in svc_seq_show() nfsd: implement server-stats-get netlink handler sunrpc: remove unused svc_version vs_count field Documentation/netlink/specs/nfsd.yaml | 105 ++++++++++++++++ fs/lockd/svc4proc.c | 4 - fs/lockd/svcproc.c | 7 -- fs/nfs/callback_xdr.c | 6 - fs/nfsd/localio.c | 3 - fs/nfsd/netlink.c | 5 + fs/nfsd/netlink.h | 2 + fs/nfsd/nfs2acl.c | 3 - fs/nfsd/nfs3acl.c | 3 - fs/nfsd/nfs3proc.c | 3 - fs/nfsd/nfs4proc.c | 3 - fs/nfsd/nfsctl.c | 221 +++++++++++++++++++++++++++++++++- fs/nfsd/nfsproc.c | 3 - include/linux/sunrpc/stats.h | 6 + include/linux/sunrpc/svc.h | 1 - include/uapi/linux/nfsd_netlink.h | 35 ++++++ net/sunrpc/stats.c | 56 ++++++++- net/sunrpc/svc.c | 8 +- 18 files changed, 434 insertions(+), 40 deletions(-) --- base-commit: 887d478bb2115cec0be8caae58bad4d4b3109b1a change-id: 20260316-exportd-netlink-1c9fb52536e3 Best regards, -- Jeff Layton