From owner-freebsd-xen@freebsd.org Tue Mar 15 17:03:03 2016 Return-Path: Delivered-To: freebsd-xen@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 193DFAD2CA7 for ; Tue, 15 Mar 2016 17:03:03 +0000 (UTC) (envelope-from gustau.perez@gmail.com) Received: from mail-wm0-x22d.google.com (mail-wm0-x22d.google.com [IPv6:2a00:1450:400c:c09::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A2841106D for ; Tue, 15 Mar 2016 17:03:02 +0000 (UTC) (envelope-from gustau.perez@gmail.com) Received: by mail-wm0-x22d.google.com with SMTP id p65so153908836wmp.1 for ; Tue, 15 Mar 2016 10:03:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:references:cc:to:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding; bh=2QLf2xWbqxUm/Cpx3wEK0nrGh4jXvWiUxw3rF+9ni/c=; b=eztq8z06T6G9akjDV2/vYxvrZppdAYVPZjsgmWLdhIog0r0YZ1CiMNrbV+iTqOYReM pvJfMvUewhZfAtltxwaiJGx77cCstdT+q6v/ieE+k5qV1zeT/LdR+OSEQ11NYffdtL2I fO88Z8nBAF6nMvtOV4PswqhwoMydgYpJ8L19mtcgueROcnw24h+xc31FMQUCtRli+yT3 J6cToVetC80ZZ9dSsddglenjAteZwb+iX+ukzCaA2wpPBz+Klo245JtXq6xPsqwz4gsn sADzorPLU6741CX++8vWKT1Ngf7/yuA9O1nbMyIgKjFOAbrqzJc+dcJtL/zQ2Fxx1V/e f5Ww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:references:cc:to:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=2QLf2xWbqxUm/Cpx3wEK0nrGh4jXvWiUxw3rF+9ni/c=; b=LTOD9Mae0F+vUhesOzPIhhhbomL9gJUXtJmFix2LWqBlEQWsd/L3GXTQPsNz1KMooe L3kF4eZhCQkeu1x8PZ/QpxJ+cpxNAuYpA3yDBhskLRQTeVGeKD+8M79ZCag0HY/o37sm 7DweYDYrfTqm7v9JaT9fCrPpx0xb6Xl9hUKbCVaOXGh8bak8MjArQ6lACl4KilUy7y1B WycgfX4VZhCA/J3Y6vtEmnwe9qIZkaanKupKlLMckKb82/ma8723Bx0U4q0RI8Yg0Rim 2VYzQDCFXAOWzBTR+ry/c7tBfzb3yIdAYuy/WreEAxF/SytQa02/JS6SmDErre82dwiY VDhw== X-Gm-Message-State: AD7BkJKC6VZ/cTzbGxgZGwToKv6WzMOnOEiCU0PJWD33QYwVFbdaAHNPSUn77vVO9x7SrA== X-Received: by 10.194.47.133 with SMTP id d5mr32684224wjn.87.1458061381097; Tue, 15 Mar 2016 10:03:01 -0700 (PDT) Received: from [10.0.2.151] ([147.83.40.10]) by smtp.googlemail.com with ESMTPSA id gb9sm27914176wjb.26.2016.03.15.10.02.59 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 15 Mar 2016 10:02:59 -0700 (PDT) Subject: Re: Porting the block-iscsi hotplug script References: <553DEB97.5000300@entel.upc.edu> <555EF542.3090002@citrix.com> <555F9B3F.1000600@entel.upc.edu> <55602512.1090702@citrix.com> <56C6FA2F.8040900@gmail.com> <56CAC8CB.8030107@gmail.com> <56CADEDA.4050007@citrix.com> <56CB0057.1060509@gmail.com> <56CB041E.1020009@citrix.com> <56CB2D90.5080809@gmail.com> <56CB34BA.6060809@citrix.com> <56CC24BD.6050609@gmail.com> <56CC32E5.5010101@citrix.com> <56CC7637.3080408@gmail.com> <56CF5668.6090605@citrix.com> <56D0091F.80408@gmail.com> <56D02863.7040100@citrix.com> <56D03D95.9090509@gmail.com> <56D04E5F.8070901@citrix.com> <56D42A28.8050701@gmail.com> <56D434FC.8030905@citrix.com> <56D57110.2060406@gmail.com> <56D587D8.6030702@citrix.com> <56D590EA.609@gmail.com> <56D591BA.4020303@gmail.com> <56D5929F.7040001@citrix.com> <56D5C722.3080205@gmail.com> <56D6B68D.8080809@citrix.com> <56D7FEFE.9050000@gmail.com> <56D97762.7000908@gmail.com> To: FreeBSD XEN From: =?UTF-8?Q?Gustau_P=c3=a9rez?= Message-ID: <56E84043.4060602@gmail.com> Date: Tue, 15 Mar 2016 18:02:59 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Mar 2016 17:03:03 -0000 > Linux already has some code to do this checking, but this also involves > taking a lock in order to make sure there's only one hotplug script > performing this check at the same time. > > The Linux function that performs this checking is in: > > http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=tools/hotplug/Linux/block;h=2691b56951c9b82094471a141b9e0bed04abb929;hb=HEAD#l40 > > And the caller is: > > http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=tools/hotplug/Linux/block;h=2691b56951c9b82094471a141b9e0bed04abb929;hb=HEAD#l275 > > If you take a look, the call to check_device_sharing is protected with the > "block" lock. > Hi, finally $WORK gave me a few time to spend and I managed to have something that works with 'sh' (ash). It'd need some comments here and there, but it works. I'll post the scripts somewhere when I got time, or would you prefer diff? Next step would be to deal with HVM domains and qemu, right? Gustau