From owner-freebsd-fs@FreeBSD.ORG Tue Aug 12 20:50:51 2008 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 56D59106564A for ; Tue, 12 Aug 2008 20:50:51 +0000 (UTC) (envelope-from root@dchagin.dialup.corbina.ru) Received: from contrabass.post.ru (contrabass.post.ru [85.21.78.5]) by mx1.freebsd.org (Postfix) with ESMTP id ECC088FC14 for ; Tue, 12 Aug 2008 20:50:50 +0000 (UTC) (envelope-from root@dchagin.dialup.corbina.ru) Received: from corbina.ru (mail.post.ru [195.14.50.16]) by contrabass.post.ru (Postfix) with ESMTP id A61B8168F20 for ; Wed, 13 Aug 2008 00:50:48 +0400 (MSD) X-Virus-Scanned: by cgpav Uf39PSi9pFi9oFi9 Received: from [10.208.17.3] (HELO dchagin.dialup.corbina.ru) by corbina.ru (CommuniGate Pro SMTP 5.1.14) with ESMTPS id 946376393 for freebsd-fs@freebsd.org; Wed, 13 Aug 2008 00:50:48 +0400 Received: from dchagin.dialup.corbina.ru (localhost.chd.net [127.0.0.1]) by dchagin.dialup.corbina.ru (8.14.2/8.14.2) with ESMTP id m7CKomNl009251 for ; Wed, 13 Aug 2008 00:50:48 +0400 (MSD) (envelope-from root@dchagin.dialup.corbina.ru) Received: (from root@localhost) by dchagin.dialup.corbina.ru (8.14.2/8.14.2/Submit) id m7CKohpR009250 for freebsd-fs@freebsd.org; Wed, 13 Aug 2008 00:50:43 +0400 (MSD) (envelope-from root) Date: Wed, 13 Aug 2008 00:50:43 +0400 From: Chagin Dmitry To: freebsd-fs@freebsd.org Message-ID: <20080812205043.GA9233@dchagin.dialup.corbina.ru> Mail-Followup-To: freebsd-fs@freebsd.org References: <20080812182028.GA7047@dchagin.dialup.corbina.ru> <48A1DB63.3050804@FreeBSD.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48A1DB63.3050804@FreeBSD.org> User-Agent: Mutt/1.4.2.3i Subject: Re: new file system (my experiments) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Aug 2008 20:50:51 -0000 On Tue, Aug 12, 2008 at 08:50:11PM +0200, Kris Kennaway wrote: > Chagin Dmitry wrote: > >Hi > > > >I experiment resalization of new file system based on tmpfs - shmfs for > >Linux emulation layer. for the beginning has simply copied current source > >codes to compat/lintmps, has compiled a module and tried to mount: > > > >mount -t lintmpfs lintmpfs /compat/linux/dev/shm > >and has received a panic: > > > >#11 0xffffffff803b6ade in calltrap () > > at /usr/local/root/pub/linux_shmfs/sys/amd64/amd64/exception.S:217 > >---Type to continue, or q to quit--- > >#12 0xffffffff802a794b in vfs_filteropt (opts=0x0, > >legal=0xffffffff808497e0) > > at /usr/local/root/pub/linux_shmfs/sys/kern/vfs_mount.c:1812 > >#13 0xffffffff80847015 in tmpfs_mount (mp=0xffffff0001a3a000, > > td=0xffffff004dcb56c0) > > at > > /usr/local/root/pub/linux_shmfs/sys/modules/lintmpfs/../../compat/lintmpf > > s/lintmpfs_vfsops.c:206 > >#14 0xffffffff802a947f in vfs_donmount (td=0xffffff004dcb56c0, fsflags=0, > > fsoptions=0xffffff000190e800) > > at /usr/local/root/pub/linux_shmfs/sys/kern/vfs_mount.c:1010 > >#15 0xffffffff802aaa46 in nmount (td=0xffffff004dcb56c0, > > uap=0xfffffffe7e7fcbf0) > > at /usr/local/root/pub/linux_shmfs/sys/kern/vfs_mount.c:417 > >#16 0xffffffff803d4e47 in syscall (frame=0xfffffffe7e7fcc80) > > at /usr/local/root/pub/linux_shmfs/sys/amd64/amd64/trap.c:902 > >#17 0xffffffff803b6ceb in Xfast_syscall () > > > >(kgdb) f 12 > >#12 0xffffffff802a794b in vfs_filteropt (opts=0x0, > >legal=0xffffffff808497e0) > > at /usr/local/root/pub/linux_shmfs/sys/kern/vfs_mount.c:1812 > >1812 { > >(kgdb) list *0xffffffff802a794b > >0xffffffff802a794b is in vfs_filteropt > >(/usr/local/root/pub/linux_shmfs/sys/kern > >/vfs_mount.c:1818). > >1813 struct vfsopt *opt; > >1814 char errmsg[255]; > >1815 const char **t, *p, *q; > >1816 int ret = 0; > >1817 > >1818 TAILQ_FOREACH(opt, opts, link) { > >1819 p = opt->name; > >1820 q = NULL; > >1821 if (p[0] == 'n' && p[1] == 'o') > >1822 q = p + 2; > >(kgdb) > >(kgdb) up > >#13 0xffffffff80847015 in tmpfs_mount (mp=0xffffff0001a3a000, > > td=0xffffff004dcb56c0) > > at > > /usr/local/root/pub/linux_shmfs/sys/modules/lintmpfs/../../compat/lintmpf > >s/lintmpfs_vfsops.c:206 > >206 if (vfs_filteropt(mp->mnt_optnew, lintmpfs_opts)) > >(kgdb) > > > >Problem in that mp->mnt_optnew is 0, but tmpfs works correctly. > >I shall not understand that I have missied... > > > > If you have DEBUG_LOCKS and/or DEBUG_VFS_LOCKS then one of them changes > the kernel ABI (adds entries to structs somewhere). You need to either > add them to the module CFLAGS or use make buildkernel. > yes, it has helped. thnx! -- Have fun! chd