From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 7DA05314A7A for ; Wed, 4 Feb 2026 12:28:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770208122; cv=none; b=ogpfVi4tXcuIvBq0htn+epyLIiq+1vTZg1gDm2o5PWdhEAecE7j9z28dgIcSJaJ10K6Mo66XITGWlEkpvDweQFrE/uNSw5unEcZrvXwXyjmLKC4wgUfnW1Bb264vTR8ISE9uwAj60fivKlL/SBkoT4/75hD9pG8YkJyDM0VSmzI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770208122; c=relaxed/simple; bh=MebNB7kxXYHJC9vusRnw8YUM+zyJCnTwYu80MnDFkSs=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=J4rzsJOdREqaqIs9akYo31XBhxpl3o3YDCUjOQJZ7zyIlMdAhFSbnwhvqLrqcluAi9/8KI7eADxBxG/36+Qfc/XLXaemHuAfAHJ5hnqHHKrUv/MUwtq9CvRQvfUvo5wD0bk3a4kUiaUR2/diNE4GiwSt3KWbkSQU/fIezQW/SkI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cNP0cVsq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cNP0cVsq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 84874C4CEF7; Wed, 4 Feb 2026 12:28:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770208122; bh=MebNB7kxXYHJC9vusRnw8YUM+zyJCnTwYu80MnDFkSs=; h=From:Subject:Date:To:Cc:From; b=cNP0cVsqE9K+0jczyqF4MVugeG7FPEOBJouHcdYZxNfz0etXtXaUTuOmUjY2pjOXv KCoyojeJ1qEVwzPHvKJA6Jhv7OnKQbkfEECidXsAO8MxhfDrEWP0c9mCzt2tnbOgnZ vTIDB6JSolP7cZ2+Is+4axkEGDFgzQKIX9xIb5UkON1ZzPZgHtFHmCe8j8+L6FnoYe 6yVVwterPPu0Ug1GnBluEXCEpXxuZPrLc2jR2e0FT/hJ+AUg+4F5iSfOv9A/i/cwYp 4AdovmUJRv9mEeGIQfkbys33YFte2NoTol6BLwY4Q4IQHk5tS5BDXuiJl6MfQO6Chh yCdUUcbg8D4ew== From: Jeff Layton Subject: [PATCH nfs-utils 0/3] nfsdctl: properly handle older kernels that don't support min-threads Date: Wed, 04 Feb 2026 07:28:25 -0500 Message-Id: <20260204-minthreads-v1-0-9f348608f884@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/x3MSwqAMAwA0auUrC3EKv6uIi6KRg1olUZFKL27x eVbzAQQ8kwCnQrg6WHhwyXkmYJxtW4hzVMyGDQVGiz0zu5aPdlJdIlmpKbGtiKEFJyeZn7/WQ9 uFn1fvAkMMX66QqyfZwAAAA== X-Change-ID: 20260203-minthreads-402ce87096e0 To: Steve Dickson Cc: Ben Coddington , Chuck Lever , linux-nfs@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=977; i=jlayton@kernel.org; h=from:subject:message-id; bh=MebNB7kxXYHJC9vusRnw8YUM+zyJCnTwYu80MnDFkSs=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBpgztzUW3gVtkaNwlv9GohKlDBQUh3CqRnVPzA7 Yn38RZFRzKJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaYM7cwAKCRAADmhBGVaC FZLxEACduKBkSj31Gh6mM1wMy69JgZu6Sw/D/MjZpNd4FsfwEpZgbms0Pud1iKA+maAwP4mFXFk CWBikokUdYTDIs55NogIjstPOuAem1crqtEU3/6uAQMmmghsOoIFUS3ZvwhVmKJ4R0uzk8NOE8B Zq8ZLoAxt8lPg8ShvUwK+yP++TdE4TbgnotdxCCRF1Rx+r36qnaHh2632I7QK4W/G1cD+OQBl9S RqiT44R1eE/H/bTI1SCU/RHQ/ysGeIJBLsW3aTX1EKYp+g5yejFhGIzOa1T68VdNy0xX+VMeaD3 e3wN7rJ5mjVZJ6ez7VCGbkW6yuMnImG4Rt+gtpBkZc/1nEh/xpULD74LAOQC/OUIe3TPaHU4sZJ QMf62EzIRRFBhckN/6BXmG5kAzHVHP61FH+nSEQJbzw96iE5gR+l3FHg8Wp47HwG+gZhzZGTcfS M7Esle7gh/ZC0OVjrv5z8zWv0dmWUDONT5yaeCo/PJ9KstaoLDE4kglMnP29uGgnKLMw+ZR/N7L 8a1wxJyuwuY2OoanWVAV25ajyCbi+OBqg8N0l0zn5Q7HqrsjsFqpJXCRe+nI9L3QYzPwDoGhqse uK1Kr9RVJ1+90sBwOgDZWBHdrvUx6Y5kUbOyGknLukyHkNj+FUHDslwaLmJKXVKcvuTFTVQ4mpd 0yjYPoyw6vXbvKw== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Ben reported a problem with using new userland with old kernel. If he tried to send down a setting that the kernel doesn't support, it returns -EINVAL to the call. This patch series adds a mechanism for nfsdctl to tell what attributes are supported by the "threads" command. If can then use that to determine whether to pass down the min-threads attribute or report an error or warning. Signed-off-by: Jeff Layton --- Jeff Layton (3): nfsdctl: only resolve netlink family names once nfsdctl: query netlink policy before sending the minthreads attribute to kernel nfsdctl: remove unneeded newlines from xlog() format strings utils/nfsdctl/nfsdctl.c | 193 +++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 168 insertions(+), 25 deletions(-) --- base-commit: 8f54511aefe1455161a6c4406ed8c770139f61e3 change-id: 20260203-minthreads-402ce87096e0 Best regards, -- Jeff Layton