Received: by 2002:a25:4158:0:0:0:0:0 with SMTP id o85csp2603748yba; Fri, 10 May 2019 14:55:17 -0700 (PDT) X-Google-Smtp-Source: APXvYqzyLMQ8PRoJK+tuqqieWE2pshWFhHy7VPIvgvo60Nbgrpsk5msZVGzGmBzmLMwIosqke/mW X-Received: by 2002:a63:f843:: with SMTP id v3mr16402594pgj.69.1557525317046; Fri, 10 May 2019 14:55:17 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1557525317; cv=none; d=google.com; s=arc-20160816; b=rmEzsdWVecR5a3C9Vx+clV1TdsrFdLrrgJy+46w+3Zlb8jwOo4YHZaKKE8h2ZJ7cRk 13YTHfblLXu0vLbhfQPl8cDXR8pZGj1xX44oLm0DqQHXT0XYqFAXh3yL+7EtcyTs3R2O 0VgqftLljAbyAAK/SpTTF5QZwqB+txARoFy+Z4eqqXssudnGDNei9chElKOzU0w2s1XT W+o897bQjQSUzdrhB667Jhv/dSGVGUZ4LDQ+IFRvFhU5uUdqj+QocCjdj5Ef8IV8qNex 1S8j23RMy/IND0HEHrr0OtgfX+S+aWwmznvzUpZwGIw8VudMmr9JMRq7mQrwcORZhT1s 717Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=XdiZCWKOT+YByhQKTjkNxaNNAPc+4JdcXCMU/V/jLYw=; b=jJ7S42R5EdiI+X5xniw4cTKkMLsWoU3mtNzYvXuRGSkopbmnIz7sGX2lK/avkl2pa8 mHcvydaTae2MFPNd6r4J6AYXF0w0+FhfIz4xjzQFLgoqIKnp5iPSLc60QHTYVk0akyJA 5YBMgD+hPDDOncJQpj3DveRn4MF66dfpfXn2RndBMdkOVdvAHKby86a2d8tc1p0LOUuo dZsQ8a0P+UMgYtYc3qYtFeXoUrhuwGEY0h1a9ywAXO487BalrS6+mlL2a965PTm3/Wta 1P31eqO8GsgE0oifKr8eD82N+qjmi/SW1f2HizmivRYHQ3p+OF7ZvUqPUEATqAYN0iGc mGow== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=eYUM6pqO; spf=pass (google.com: best guess record for domain of linux-nfs-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id n5si8512573plk.419.2019.05.10.14.54.51; Fri, 10 May 2019 14:55:17 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-nfs-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=eYUM6pqO; spf=pass (google.com: best guess record for domain of linux-nfs-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728160AbfEJVys (ORCPT + 99 others); Fri, 10 May 2019 17:54:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:43956 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727828AbfEJVys (ORCPT ); Fri, 10 May 2019 17:54:48 -0400 Received: from tleilax.poochiereds.net (cpe-71-70-156-158.nc.res.rr.com [71.70.156.158]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6DEDE217D6; Fri, 10 May 2019 21:54:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557525287; bh=OlL2+v8U1rTwUryIIhYhCqJpysGNxtNHY09Fq/O9t74=; h=From:To:Cc:Subject:Date:From; b=eYUM6pqOPCLapV1ItJQzqJ8LffhgN/N4pizwCd4w7L2S+lSGBXP6iJKprYgMaE15R OUlfjdPfcYDT6dFIeKU1+AEYrmVWOGgHZ7uZf2EUmbn/C6eEs4SwD3EQbofkFczfs0 9wRCnyFzUU7KdSHgLQ4k1yJ9Vj/Qo68jV9bMnei0= From: Jeff Layton To: steved@redhat.com Cc: linux-nfs@vger.kernel.org, jfajerski@suse.com Subject: [PATCH] manpage: explain why showmount doesn't really work against a v4-only server Date: Fri, 10 May 2019 17:54:45 -0400 Message-Id: <20190510215445.1823-1-jlayton@kernel.org> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Jeff Layton I occasionally see people that expect valid info when running showmount against a server that may export some or all filesystems via NFSv4. Let's make it clear that it only works by talking to the remote MNT service, and that that may not be available from a v4-only server. Cc: Jan Fajerski Signed-off-by: Jeff Layton --- utils/showmount/showmount.man | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/utils/showmount/showmount.man b/utils/showmount/showmount.man index a2f510fb5617..35818e1b61c5 100644 --- a/utils/showmount/showmount.man +++ b/utils/showmount/showmount.man @@ -56,5 +56,10 @@ Because .B showmount sorts and uniqs the output, it is impossible to determine from the output whether a client is mounting the same directory more than once. +.P +.B showmount +works by contacting the server's MNT service directly. NFSv4-only servers have +no need to advertise their exported root filehandles via this method, and may +not expose their MNT service to clients. .SH AUTHOR Rick Sladkey -- 2.21.0