From owner-freebsd-current@freebsd.org Sun Dec 17 20:37:43 2017 Return-Path: Delivered-To: freebsd-current@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 ED985E94E8C for ; Sun, 17 Dec 2017 20:37:43 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 8463A7D35B for ; Sun, 17 Dec 2017 20:37:43 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id vBHKbYLW095512 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sun, 17 Dec 2017 22:37:38 +0200 (EET) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua vBHKbYLW095512 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id vBHKbYSX095511; Sun, 17 Dec 2017 22:37:34 +0200 (EET) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Sun, 17 Dec 2017 22:37:34 +0200 From: Konstantin Belousov To: Dan Langille Cc: freebsd-current@freebsd.org Subject: Re: cannot access pass device from within jail Message-ID: <20171217203734.GA2272@kib.kiev.ua> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.1 (2017-09-22) X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on tom.home X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 Dec 2017 20:37:44 -0000 On Sun, Dec 17, 2017 at 02:52:12PM -0500, Dan Langille wrote: > Hello, > > What suggestions do you have for where I should look next? I'm happy to start installing various builds of FreeBSD in order to track down which commit caused this. > > I'm trying to access a tape library from within a jail running on a FreeBSD 11.1 host. sa(4) devices are working (e.g. I can rewind nsa0). > > pass(4) devices (i.e. the tape changer ch0) are not working. This morning I posted to -scsi@: https://lists.freebsd.org/pipermail/freebsd-scsi/2017-December/007608.html > > The device appears in the jail and has appropriate permissions. This access was granted > via /etc/devfs.rules using the same approach I used for FreeBSD 10.3 > > The permissions in the jail: > > [root@bacula-sd-02 ~]# ls -l /dev/pass7 > crw------- 1 root operator 0x74 Dec 16 21:52 /dev/pass7 > > The command in the jail: > > [root@bacula-sd-02 ~]# mtx -f /dev/pass7 status > cannot open SCSI device '/dev/pass7' - Operation not permitted > > Here is the truss output of the command in question: https://gist.github.com/dlangille/b80ee804b8080e1cbf5b5ab67f0bdabe Does it work to access the pass device from host using host' /dev ? Same question for the host access using the nodes of the jailed devfs mount.