Received: (at 21018) by debbugs.gnu.org; 7 Aug 2015 17:10:50 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Aug 07 13:10:50 2015 Received: from localhost ([127.0.0.1]:50318 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ZNlAQ-0002Yx-Dy for submit <at> debbugs.gnu.org; Fri, 07 Aug 2015 13:10:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48419) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <bcl@HIDDEN>) id 1ZNlAO-0002Yp-Ce for 21018 <at> debbugs.gnu.org; Fri, 07 Aug 2015 13:10:49 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id C03DEAA0A4; Fri, 7 Aug 2015 17:10:47 +0000 (UTC) Received: from lister.brianlane.com (ovpn-113-169.phx2.redhat.com [10.3.113.169]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t77HAiVY028261 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 7 Aug 2015 13:10:46 -0400 Date: Fri, 7 Aug 2015 10:10:44 -0700 From: "Brian C. Lane" <bcl@HIDDEN> To: Dan Williams <dan.j.williams@HIDDEN> Subject: Re: bug#21018: Support for "libnvdimm BLK" devices Message-ID: <20150807171044.GU2515@HIDDEN> References: <CAPcyv4j0cqJq_Q+7U3dSS4n9RH6rVTkFsprXu_0nfegrQgMP+Q@HIDDEN> <20150709215252.GD3080@HIDDEN> <CAPcyv4g8aeNKBnDNY20rBjsUNiJL-D=YaQ2rbOpM95oBMwOOMA@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <CAPcyv4g8aeNKBnDNY20rBjsUNiJL-D=YaQ2rbOpM95oBMwOOMA@HIDDEN> User-Agent: Mutt/1.5.23 (2014-03-12) X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-Spam-Score: -5.1 (-----) X-Debbugs-Envelope-To: 21018 Cc: 21018 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -5.1 (-----) On Mon, Aug 03, 2015 at 10:24:32PM -0700, Dan Williams wrote: > On Thu, Jul 9, 2015 at 2:52 PM, Brian C. Lane <bcl@HIDDEN> wrote: > > On Thu, Jul 09, 2015 at 10:00:10AM -0700, Dan Williams wrote: > >> BLK mode devices emitted by the libnvdimm sub-system [1] have a "." in > >> their name. When parted calls _probe_sys_block() it trips over this > >> fact and unconditionally re-writes the block device name. > >> > >> /* in /sys/block, '/'s are replaced with '!' or '.' */ > >> for (ptr = dev_name; *ptr != '\0'; ptr++) { > >> if (*ptr == '!' || *ptr == '.') > >> *ptr = '/'; > >> } > >> > >> This is confirmed by strace where parted emits calls to > >> > >> lstat("/dev/ndblk2", 0x7ffec6b33e50) = -1 ENOENT (No such file or directory) > >> stat("/dev/ndblk2/0", 0x7ffec6b33dc0) = -1 ENOENT (No such file or directory) > >> > >> The original BLK device name is /dev/ndblk2.0. > >> > >> This can be reproduced with a 4.2-rc1+ kernel and the nfit_test > >> module. See the libndctl readme for instructions on getting the test > >> environment running [2]. > >> > >> [1]: https://git.kernel.org/cgit/linux/kernel/git/djbw/nvdimm.git/tree/Documentation/nvdimm/nvdimm.txt?h=libnvdimm-for-next > >> > >> [2]: https://github.com/pmem/ndctl > > > > Thanks for the report. I think we can reduce this to just replacing '!', > > as far as I can tell cciss is the only device that has subdirectories > > and uses the ! in the name. Looking at the current kernel code it looks > > like the substitution is done in drivers/base/core.c -> > > device_get_devnode() > > > > I'm no kernel expert though. What does everyone think about dropping the > > '.'? Do you know of anything that this would break? > > > > In blivet (our storage library which handles all the devices we've ever > > seen) it only looks for ! so that's reassuring. > > > > Any update on this? > > With this one line change, parted can list libnvdimm "BLK" devices: > > diff --git a/libparted/arch/linux.c b/libparted/arch/linux.c > index 27bbb8043e4f..2719ac327236 100644 > --- a/libparted/arch/linux.c > +++ b/libparted/arch/linux.c > @@ -2237,7 +2237,7 @@ _probe_sys_block () > strcat (dev_name, dirent->d_name); > /* in /sys/block, '/'s are replaced with '!' or '.' */ > for (ptr = dev_name; *ptr != '\0'; ptr++) { > - if (*ptr == '!' || *ptr == '.') > + if (*ptr == '!') > *ptr = '/'; > } > _ped_device_probe (dev_name); I think this is fine. I'll push it later today. Thanks! -- Brian C. Lane | Anaconda Team | IRC: bcl #anaconda | Port Orchard, WA (PST8PDT)
bug-parted@HIDDEN
:bug#21018
; Package parted
.
Full text available.Received: (at 21018) by debbugs.gnu.org; 4 Aug 2015 05:24:36 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Aug 04 01:24:36 2015 Received: from localhost ([127.0.0.1]:38959 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ZMUiJ-00012l-IO for submit <at> debbugs.gnu.org; Tue, 04 Aug 2015 01:24:36 -0400 Received: from mail-wi0-f169.google.com ([209.85.212.169]:33092) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <dan.j.williams@HIDDEN>) id 1ZMUiH-00012a-0f for 21018 <at> debbugs.gnu.org; Tue, 04 Aug 2015 01:24:34 -0400 Received: by wicmv11 with SMTP id mv11so160572671wic.0 for <21018 <at> debbugs.gnu.org>; Mon, 03 Aug 2015 22:24:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=Nr82DDh2+NdUGlerkM+hLvkO1RA7bSyRUNikJocsN3o=; b=RvQ+zQ8bphh+SW/yjO3WW4750H+dQBRJYS9lcoA82JBXu3mwHn2O+ZMTtFiNVhuh3l IAhdScawLNUmi7rkt/+xkWEq1Ke2OH6MHMOrp8SI9N0OvrVy1+tpdToDYuE+i5uUjrA1 qJ8k7CX49SZ9pEaKckTTMOcahrxMnH0wG6HPNd558TYKU2x0Pi+xwKQRVZiMizNImAMZ EjIh1iJI/mAVCAG/Jr4g+c7CjjzduUuG5TT7+qY/05S6bM9v2zdTyHhk/caIHMJYCmU1 uEISsoNKZ9tCHDiX28A9NBry1juJBzsvWDy4sp7Ozlfascsyfjoubg+ijxDBg5+Ym2qZ uA3Q== X-Gm-Message-State: ALoCoQlItbGUuiA7ypwWfSqK//3LvwxMwn8CMh5BRxIvMiUMPzPkgkQO0LffLu9wJvffpnWnyTeW MIME-Version: 1.0 X-Received: by 10.194.90.70 with SMTP id bu6mr3847010wjb.149.1438665872415; Mon, 03 Aug 2015 22:24:32 -0700 (PDT) Received: by 10.27.127.196 with HTTP; Mon, 3 Aug 2015 22:24:32 -0700 (PDT) In-Reply-To: <20150709215252.GD3080@HIDDEN> References: <CAPcyv4j0cqJq_Q+7U3dSS4n9RH6rVTkFsprXu_0nfegrQgMP+Q@HIDDEN> <20150709215252.GD3080@HIDDEN> Date: Mon, 3 Aug 2015 22:24:32 -0700 Message-ID: <CAPcyv4g8aeNKBnDNY20rBjsUNiJL-D=YaQ2rbOpM95oBMwOOMA@HIDDEN> Subject: Re: bug#21018: Support for "libnvdimm BLK" devices From: Dan Williams <dan.j.williams@HIDDEN> To: "Brian C. Lane" <bcl@HIDDEN> Content-Type: text/plain; charset=UTF-8 X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 21018 Cc: 21018 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.7 (/) On Thu, Jul 9, 2015 at 2:52 PM, Brian C. Lane <bcl@HIDDEN> wrote: > On Thu, Jul 09, 2015 at 10:00:10AM -0700, Dan Williams wrote: >> BLK mode devices emitted by the libnvdimm sub-system [1] have a "." in >> their name. When parted calls _probe_sys_block() it trips over this >> fact and unconditionally re-writes the block device name. >> >> /* in /sys/block, '/'s are replaced with '!' or '.' */ >> for (ptr = dev_name; *ptr != '\0'; ptr++) { >> if (*ptr == '!' || *ptr == '.') >> *ptr = '/'; >> } >> >> This is confirmed by strace where parted emits calls to >> >> lstat("/dev/ndblk2", 0x7ffec6b33e50) = -1 ENOENT (No such file or directory) >> stat("/dev/ndblk2/0", 0x7ffec6b33dc0) = -1 ENOENT (No such file or directory) >> >> The original BLK device name is /dev/ndblk2.0. >> >> This can be reproduced with a 4.2-rc1+ kernel and the nfit_test >> module. See the libndctl readme for instructions on getting the test >> environment running [2]. >> >> [1]: https://git.kernel.org/cgit/linux/kernel/git/djbw/nvdimm.git/tree/Documentation/nvdimm/nvdimm.txt?h=libnvdimm-for-next >> >> [2]: https://github.com/pmem/ndctl > > Thanks for the report. I think we can reduce this to just replacing '!', > as far as I can tell cciss is the only device that has subdirectories > and uses the ! in the name. Looking at the current kernel code it looks > like the substitution is done in drivers/base/core.c -> > device_get_devnode() > > I'm no kernel expert though. What does everyone think about dropping the > '.'? Do you know of anything that this would break? > > In blivet (our storage library which handles all the devices we've ever > seen) it only looks for ! so that's reassuring. > Any update on this? With this one line change, parted can list libnvdimm "BLK" devices: diff --git a/libparted/arch/linux.c b/libparted/arch/linux.c index 27bbb8043e4f..2719ac327236 100644 --- a/libparted/arch/linux.c +++ b/libparted/arch/linux.c @@ -2237,7 +2237,7 @@ _probe_sys_block () strcat (dev_name, dirent->d_name); /* in /sys/block, '/'s are replaced with '!' or '.' */ for (ptr = dev_name; *ptr != '\0'; ptr++) { - if (*ptr == '!' || *ptr == '.') + if (*ptr == '!') *ptr = '/'; } _ped_device_probe (dev_name);
bug-parted@HIDDEN
:bug#21018
; Package parted
.
Full text available.Received: (at submit) by debbugs.gnu.org; 9 Jul 2015 21:53:12 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Jul 09 17:53:12 2015 Received: from localhost ([127.0.0.1]:45601 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ZDJkl-0006Xq-JG for submit <at> debbugs.gnu.org; Thu, 09 Jul 2015 17:53:11 -0400 Received: from eggs.gnu.org ([208.118.235.92]:36233) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <bcl@HIDDEN>) id 1ZDJki-0006XS-Fr for submit <at> debbugs.gnu.org; Thu, 09 Jul 2015 17:53:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <bcl@HIDDEN>) id 1ZDJkc-00035V-3x for submit <at> debbugs.gnu.org; Thu, 09 Jul 2015 17:53:03 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_05 autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:59705) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <bcl@HIDDEN>) id 1ZDJkc-00035P-0v for submit <at> debbugs.gnu.org; Thu, 09 Jul 2015 17:53:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49739) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <bcl@HIDDEN>) id 1ZDJka-0001Ir-LK for bug-parted@HIDDEN; Thu, 09 Jul 2015 17:53:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <bcl@HIDDEN>) id 1ZDJkW-00034b-Ge for bug-parted@HIDDEN; Thu, 09 Jul 2015 17:53:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35137) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <bcl@HIDDEN>) id 1ZDJkW-000349-BS for bug-parted@HIDDEN; Thu, 09 Jul 2015 17:52:56 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id B5C744C0A1 for <bug-parted@HIDDEN>; Thu, 9 Jul 2015 21:52:54 +0000 (UTC) Received: from lister.brianlane.com (ovpn-113-156.phx2.redhat.com [10.3.113.156]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t69Lqqlq012276 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for <bug-parted@HIDDEN>; Thu, 9 Jul 2015 17:52:54 -0400 Date: Thu, 9 Jul 2015 14:52:52 -0700 From: "Brian C. Lane" <bcl@HIDDEN> To: bug-parted@HIDDEN Subject: Re: bug#21018: Support for "libnvdimm BLK" devices Message-ID: <20150709215252.GD3080@HIDDEN> References: <CAPcyv4j0cqJq_Q+7U3dSS4n9RH6rVTkFsprXu_0nfegrQgMP+Q@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <CAPcyv4j0cqJq_Q+7U3dSS4n9RH6rVTkFsprXu_0nfegrQgMP+Q@HIDDEN> User-Agent: Mutt/1.5.23 (2014-03-12) X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -5.0 (-----) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -5.0 (-----) On Thu, Jul 09, 2015 at 10:00:10AM -0700, Dan Williams wrote: > BLK mode devices emitted by the libnvdimm sub-system [1] have a "." in > their name. When parted calls _probe_sys_block() it trips over this > fact and unconditionally re-writes the block device name. > > /* in /sys/block, '/'s are replaced with '!' or '.' */ > for (ptr = dev_name; *ptr != '\0'; ptr++) { > if (*ptr == '!' || *ptr == '.') > *ptr = '/'; > } > > This is confirmed by strace where parted emits calls to > > lstat("/dev/ndblk2", 0x7ffec6b33e50) = -1 ENOENT (No such file or directory) > stat("/dev/ndblk2/0", 0x7ffec6b33dc0) = -1 ENOENT (No such file or directory) > > The original BLK device name is /dev/ndblk2.0. > > This can be reproduced with a 4.2-rc1+ kernel and the nfit_test > module. See the libndctl readme for instructions on getting the test > environment running [2]. > > [1]: https://git.kernel.org/cgit/linux/kernel/git/djbw/nvdimm.git/tree/Documentation/nvdimm/nvdimm.txt?h=libnvdimm-for-next > > [2]: https://github.com/pmem/ndctl Thanks for the report. I think we can reduce this to just replacing '!', as far as I can tell cciss is the only device that has subdirectories and uses the ! in the name. Looking at the current kernel code it looks like the substitution is done in drivers/base/core.c -> device_get_devnode() I'm no kernel expert though. What does everyone think about dropping the '.'? Do you know of anything that this would break? In blivet (our storage library which handles all the devices we've ever seen) it only looks for ! so that's reassuring. -- Brian C. Lane | Anaconda Team | IRC: bcl #anaconda | Port Orchard, WA (PST8PDT)
bug-parted@HIDDEN
:bug#21018
; Package parted
.
Full text available.Received: (at submit) by debbugs.gnu.org; 9 Jul 2015 17:04:35 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Jul 09 13:04:35 2015 Received: from localhost ([127.0.0.1]:45387 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ZDFFS-00081R-FQ for submit <at> debbugs.gnu.org; Thu, 09 Jul 2015 13:04:35 -0400 Received: from eggs.gnu.org ([208.118.235.92]:43518) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <dan.j.williams@HIDDEN>) id 1ZDFBQ-0007uh-Ca for submit <at> debbugs.gnu.org; Thu, 09 Jul 2015 13:00:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <dan.j.williams@HIDDEN>) id 1ZDFBK-0008OM-4Q for submit <at> debbugs.gnu.org; Thu, 09 Jul 2015 13:00:19 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:43388) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <dan.j.williams@HIDDEN>) id 1ZDFBK-0008OH-1X for submit <at> debbugs.gnu.org; Thu, 09 Jul 2015 13:00:18 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57013) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <dan.j.williams@HIDDEN>) id 1ZDFBJ-00084M-1d for bug-parted@HIDDEN; Thu, 09 Jul 2015 13:00:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <dan.j.williams@HIDDEN>) id 1ZDFBD-0008Mj-UZ for bug-parted@HIDDEN; Thu, 09 Jul 2015 13:00:16 -0400 Received: from mail-wi0-f170.google.com ([209.85.212.170]:37085) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <dan.j.williams@HIDDEN>) id 1ZDFBD-0008MN-Oq for bug-parted@HIDDEN; Thu, 09 Jul 2015 13:00:11 -0400 Received: by wiclp1 with SMTP id lp1so114681967wic.0 for <bug-parted@HIDDEN>; Thu, 09 Jul 2015 10:00:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=5sMrZf1bB6JMPHaUq8tp3R2Y8AII+MB4LGDcQki4r9M=; b=k8bkKwRCkeiYH95Tx/Ay0NXenATn+U0ywFY0E07jW3BDSsYP/GnWuQXMHF3BH21R4N xqEg8a2bkiDBYBf/+USbEBio/yIbvrxl1W90g3qR9anFIQmBy3ceKw0VHZGw+92pTQQ+ M7iPRCFT2ChCMtmVzTg0u9i4mRSupC3kePaksQxYPEjAc8jhjWEXj++1FLuH4iaxjekE ehfJVIf0ShEiYQaCWFcOd001KU/hKYg+4Pr/UZkdG8XKDPPlT79dgwHhnxWIFdPc9Nrw R6pr1agjB7UzJLJbaWysz4v0AHpVzwjh6iPFQjosmv3I70RyetyEDWalbVPwJU1W8Mwb p+pQ== X-Gm-Message-State: ALoCoQm3lBU5RTzkONIykCuk1qCd14AO5XKF+8W/EFWqnzOqUJGJi+wboHrmCzQxT+U3aadJLym2 MIME-Version: 1.0 X-Received: by 10.180.198.52 with SMTP id iz20mr97043811wic.77.1436461210495; Thu, 09 Jul 2015 10:00:10 -0700 (PDT) Received: by 10.27.127.68 with HTTP; Thu, 9 Jul 2015 10:00:10 -0700 (PDT) Date: Thu, 9 Jul 2015 10:00:10 -0700 Message-ID: <CAPcyv4j0cqJq_Q+7U3dSS4n9RH6rVTkFsprXu_0nfegrQgMP+Q@HIDDEN> Subject: Support for "libnvdimm BLK" devices From: Dan Williams <dan.j.williams@HIDDEN> To: bug-parted@HIDDEN Content-Type: text/plain; charset=UTF-8 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.0 (----) X-Debbugs-Envelope-To: submit X-Mailman-Approved-At: Thu, 09 Jul 2015 13:04:32 -0400 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -4.0 (----) BLK mode devices emitted by the libnvdimm sub-system [1] have a "." in their name. When parted calls _probe_sys_block() it trips over this fact and unconditionally re-writes the block device name. /* in /sys/block, '/'s are replaced with '!' or '.' */ for (ptr = dev_name; *ptr != '\0'; ptr++) { if (*ptr == '!' || *ptr == '.') *ptr = '/'; } This is confirmed by strace where parted emits calls to lstat("/dev/ndblk2", 0x7ffec6b33e50) = -1 ENOENT (No such file or directory) stat("/dev/ndblk2/0", 0x7ffec6b33dc0) = -1 ENOENT (No such file or directory) The original BLK device name is /dev/ndblk2.0. This can be reproduced with a 4.2-rc1+ kernel and the nfit_test module. See the libndctl readme for instructions on getting the test environment running [2]. [1]: https://git.kernel.org/cgit/linux/kernel/git/djbw/nvdimm.git/tree/Documentation/nvdimm/nvdimm.txt?h=libnvdimm-for-next [2]: https://github.com/pmem/ndctl
Dan Williams <dan.j.williams@HIDDEN>
:bug-parted@HIDDEN
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Full text available.bug-parted@HIDDEN
:bug#21018
; Package parted
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