From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E822E2D5950; Tue, 13 Jan 2026 14:55:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768316117; cv=none; b=bTAlx+QfRmnNgTuSYsj1dxuCT8V0ypHR++mZuqYAs1KoTGqWjqi4dATBwPwoS5MdoE/56IWoptgzG1h+YW2aa6ejAj3KmMZybu5D7syFgJ1IrmbkMj8qTBzaxI1c2SdyyBXr6EMbcIX7OxPeFyteIzcxoHYkg1tOFhIL1ERAuVk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768316117; c=relaxed/simple; bh=bfIM1fR8gdAxufoD568zE6Xe4mmrFMtNm5YRrKxfWsU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=cmL79ntMLhS5H1+k3qwp4/rPnbQXLVptIz0d6ubG4tB8Nzumzbdhc8DU2Y8u182WmmQp8G8AiI9iTjEoyPNvZg+dHKqS3mGK2AewcfcFDcPrnCDqqLZ/fY0d5/AczlueItfnRR19jbwPZtQ80Pk90WQ0Yr0xv5DA1weZH9gWyCk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=4Xu9MpV1; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="4Xu9MpV1" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=P2AuSB3q0O5lkw/gF1nY/Lrh9I92MUD/Wumu9860GzA=; b=4Xu9MpV1fb36nk+xLVqjw50voP zN/I3Mf0fobYWLAtyiFh6eeo2iNKSQjTeeoaA3AO23SzK+/Vk2xX9VLh/6wcQuPfbSCvUOgDwyZYy tXshgL07k3R6MJgxwiaacOrzdFKqY26ilV+3ph2n3cLlcyEKXdyvGWC1WCSx/3BvnFpOaXNp0hUlA LOdIhx3h0ffALf9ACVX13Eu4Iz33hZNDOWMQjukRFeiggJlDl5sQ6RHc1RZf9BGxevbcm69L9/VYf CAJ9bUHsn3reBoeGpHTySi5zkROuhZhDghCw4gv3aAP/DG1boh0ciWwdyMBlKp1WmN0ZP9AS9/Kc/ 9BtfzNuw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vffmt-00000007IYZ-1cGp; Tue, 13 Jan 2026 14:54:27 +0000 Date: Tue, 13 Jan 2026 06:54:27 -0800 From: Christoph Hellwig To: Christian Brauner Cc: Jeff Layton , Amir Goldstein , Chuck Lever , Jan Kara , Luis de Bethencourt , Salah Triki , Nicolas Pitre , Christoph Hellwig , Anders Larsen , Alexander Viro , David Sterba , Chris Mason , Gao Xiang , Chao Yu , Yue Hu , Jeffle Xu , Sandeep Dhavale , Hongbo Li , Chunhai Guo , Jan Kara , Theodore Ts'o , Andreas Dilger , Jaegeuk Kim , OGAWA Hirofumi , David Woodhouse , Richard Weinberger , Dave Kleikamp , Ryusuke Konishi , Viacheslav Dubeyko , Konstantin Komarov , Mark Fasheh , Joel Becker , Joseph Qi , Mike Marshall , Martin Brandenburg , Miklos Szeredi , Phillip Lougher , Carlos Maiolino , Hugh Dickins , Baolin Wang , Andrew Morton , Namjae Jeon , Sungjong Seo , Yuezhang Mo , Alexander Aring , Andreas Gruenbacher , Jonathan Corbet , "Matthew Wilcox (Oracle)" , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , Xiubo Li , Ilya Dryomov , Trond Myklebust , Anna Schumaker , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Bharath SM , Hans de Goede , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@lists.linux.dev, devel@lists.orangefs.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, gfs2@lists.linux.dev, linux-doc@vger.kernel.org, v9fs@lists.linux.dev, ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org Subject: Re: [PATCH 00/24] vfs: require filesystems to explicitly opt-in to lease support Message-ID: References: <20260108-setlease-6-20-v1-0-ea4dec9b67fa@kernel.org> <8af369636c32b868f83669c49aea708ca3b894ac.camel@kernel.org> <20260113-mondlicht-raven-82fc4eb70e9d@brauner> Precedence: bulk X-Mailing-List: ceph-devel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260113-mondlicht-raven-82fc4eb70e9d@brauner> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Tue, Jan 13, 2026 at 09:54:15AM +0100, Christian Brauner wrote: > I don't think we want to expose cgroupfs via NFS that's super weird. > It's like remote partial resource management and it would be very > strange if a remote process suddenly would be able to move things around > in the cgroup tree. So I would prefer to not do this. > > So my preference would be to really sever file handles from the export > mechanism so that we can allow stuff like pidfs and nsfs and cgroupfs to > use file handles via name_to_handle_at() and open_by_handle_at() without > making them exportable. I don't understand this discussion. If someone really wants to expose say cgroupfs to the network they'll find a way, be that using a userspace nfs server, samba, 9p or a custom fuse thing. What's the benefit of explicitly prohibiting a knfsd export? (not that I think any of this makes much sense to start with) From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B3DDFD2D11F for ; Tue, 13 Jan 2026 14:55:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.sourceforge.net; s=beta; h=Content-Transfer-Encoding:Content-Type:Cc: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Subject:In-Reply-To:MIME-Version:References:Message-ID:To:From:Date:Sender: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Q5clGHv9uP/d/NL2HtjT8Z20BWcHZlU5+gaBcJERFnY=; b=IatD6pWMlm0dPBsegO1XrjgdXs H0VVN9ALNv0ny8hoJwMMCHGimO14CQdFnJjIStYKba469BXeOfaLQDttITbLx7VZn+HuUGub+OMU1 tZcrEDcLzx0BHTzxB7gflFtlat00dG01RLNVYFaWSPGrrxJDc0i4fjFqXiSOfNVqrI5g=; Received: from [127.0.0.1] (helo=sfs-ml-3.v29.lw.sourceforge.com) by sfs-ml-3.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1vffo1-0004tW-8C; Tue, 13 Jan 2026 14:55:37 +0000 Received: from [172.30.29.66] (helo=mx.sourceforge.net) by sfs-ml-3.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1vffnx-0004tL-Mq; Tue, 13 Jan 2026 14:55:34 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=In-Reply-To:Content-Type:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=P2AuSB3q0O5lkw/gF1nY/Lrh9I92MUD/Wumu9860GzA=; b=mBdzV65lS3X+Iz9/Eop9kyzmR6 Ttp9xyhNm+D5H5WGrX4In+QXfxOpC2xuasaOv/E1HxuiU/kDUTbCqGiLhxBHfjBVRYKTfgqzZzClP xQhSTKqGvIXYZlR/sV5cKOJuJaUEA6N8oy8DIlvFQOtk9s7OWydupXl6HmxTnyHdWpFA=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To :From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=P2AuSB3q0O5lkw/gF1nY/Lrh9I92MUD/Wumu9860GzA=; b=OMZWQdBxqplOztyJjWV9zirn2d /vQ83YoI1hIidse48ozsaE1hxUzCJ93KoZCnPPKgnWvZlxcvwMcdrTuo7TjerQ9LzOFDseAZmwyZx omrKcYJE875KtcQUPFapCdG5vj7cGuXtO+yDbNixNQYc13HUd4Nl6QPnuMOPAGnksvAQ=; Received: from bombadil.infradead.org ([198.137.202.133]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1vffnw-00086H-Q8; Tue, 13 Jan 2026 14:55:33 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=P2AuSB3q0O5lkw/gF1nY/Lrh9I92MUD/Wumu9860GzA=; b=4Xu9MpV1fb36nk+xLVqjw50voP zN/I3Mf0fobYWLAtyiFh6eeo2iNKSQjTeeoaA3AO23SzK+/Vk2xX9VLh/6wcQuPfbSCvUOgDwyZYy tXshgL07k3R6MJgxwiaacOrzdFKqY26ilV+3ph2n3cLlcyEKXdyvGWC1WCSx/3BvnFpOaXNp0hUlA LOdIhx3h0ffALf9ACVX13Eu4Iz33hZNDOWMQjukRFeiggJlDl5sQ6RHc1RZf9BGxevbcm69L9/VYf CAJ9bUHsn3reBoeGpHTySi5zkROuhZhDghCw4gv3aAP/DG1boh0ciWwdyMBlKp1WmN0ZP9AS9/Kc/ 9BtfzNuw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vffmt-00000007IYZ-1cGp; Tue, 13 Jan 2026 14:54:27 +0000 Date: Tue, 13 Jan 2026 06:54:27 -0800 From: Christoph Hellwig To: Christian Brauner Message-ID: References: <20260108-setlease-6-20-v1-0-ea4dec9b67fa@kernel.org> <8af369636c32b868f83669c49aea708ca3b894ac.camel@kernel.org> <20260113-mondlicht-raven-82fc4eb70e9d@brauner> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260113-mondlicht-raven-82fc4eb70e9d@brauner> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Headers-End: 1vffnw-00086H-Q8 Subject: Re: [f2fs-dev] [PATCH 00/24] vfs: require filesystems to explicitly opt-in to lease support X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Latchesar Ionkov , Dave Kleikamp , Alexander Aring , Jan Kara , Paulo Alcantara , Sandeep Dhavale , Martin Brandenburg , Yuezhang Mo , Anders Larsen , Amir Goldstein , jfs-discussion@lists.sourceforge.net, linux-unionfs@vger.kernel.org, Konstantin Komarov , Chris Mason , Andreas Dilger , Chunhai Guo , Ilya Dryomov , Ronnie Sahlberg , linux-mtd@lists.infradead.org, Mike Marshall , linux-xfs@vger.kernel.org, Xiubo Li , Yue Hu , Miklos Szeredi , samba-technical@lists.samba.org, Richard Weinberger , Mark Fasheh , devel@lists.orangefs.org, Hugh Dickins , "Matthew Wilcox \(Oracle\)" , ntfs3@lists.linux.dev, Christoph Hellwig , Joseph Qi , linux-mm@kvack.org, Viacheslav Dubeyko , linux-btrfs@vger.kernel.org, Gao Xiang , linux-ext4@vger.kernel.org, Salah Triki , Carlos Maiolino , Dominique Martinet , Shyam Prasad N , Christian Schoenebeck , linux-doc@vger.kernel.org, linux-cifs@vger.kernel.org, Tom Talpey , ocfs2-devel@lists.linux.dev, Bharath SM , linux-nilfs@vger.kernel.org, David Sterba , Alexander Viro , Baolin Wang , Jeffle Xu , Jaegeuk Kim , ceph-devel@vger.kernel.org, Eric Van Hensbergen , Ryusuke Konishi , OGAWA Hirofumi , Andreas Gruenbacher , Hans de Goede , gfs2@lists.linux.dev, linux-nfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, Theodore Ts'o , Luis de Bethencourt , Nicolas Pitre , linux-erofs@lists.ozlabs.org, v9fs@lists.linux.dev, Jonathan Corbet , Jeff Layton , linux-kernel@vger.kernel.org, Namjae Jeon , Steve French , Chuck Lever , Hongbo Li , Anna Schumaker , Jan Kara , linux-fsdevel@vger.kernel.org, Phillip Lougher , Andrew Morton , Sungjong Seo , David Woodhouse , Trond Myklebust , Joel Becker Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On Tue, Jan 13, 2026 at 09:54:15AM +0100, Christian Brauner wrote: > I don't think we want to expose cgroupfs via NFS that's super weird. > It's like remote partial resource management and it would be very > strange if a remote process suddenly would be able to move things around > in the cgroup tree. So I would prefer to not do this. > > So my preference would be to really sever file handles from the export > mechanism so that we can allow stuff like pidfs and nsfs and cgroupfs to > use file handles via name_to_handle_at() and open_by_handle_at() without > making them exportable. I don't understand this discussion. If someone really wants to expose say cgroupfs to the network they'll find a way, be that using a userspace nfs server, samba, 9p or a custom fuse thing. What's the benefit of explicitly prohibiting a knfsd export? (not that I think any of this makes much sense to start with) _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7DFD4D2D11F for ; Tue, 13 Jan 2026 14:54:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=BBeKXomHJBdf2wEdU+SEDwoulv1gUQ/3MDsGkMDeVhs=; b=aHEv2DfODEyGce U7tcCzPuJFfcI1HAYL3rNQCmM8s18Y3vgJ7JchIjvdlblPQdUzpmcXamcTChLJdz4nG8jF7GsrgqN 1Pg8BrCr6YH68adP6AAw5UnUJICbkij2bk8tBeis9y8Kl3qJLDdTNFA8Dwkfpo/7VW+Op15U8XLsc e8qOpoaCB6PnvOByJOlHC+F0L3Gg5Hxyltj3UYFXM0L6jNURG2qcyR3f7YPxWbHYWJsmphJSwwM0D EJUE9MW31zs1RJcNWEJ0TJgPihEt2jcyS1R7fczrse/3F8uVaHx1wRmbJTrSsIROIW308ch5hjU68 OoMdsKlrlRWFF1LTZjXA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vffn4-00000007IZE-188v; Tue, 13 Jan 2026 14:54:38 +0000 Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vffmt-00000007IYZ-1cGp; Tue, 13 Jan 2026 14:54:27 +0000 Date: Tue, 13 Jan 2026 06:54:27 -0800 From: Christoph Hellwig To: Christian Brauner Cc: Jeff Layton , Amir Goldstein , Chuck Lever , Jan Kara , Luis de Bethencourt , Salah Triki , Nicolas Pitre , Christoph Hellwig , Anders Larsen , Alexander Viro , David Sterba , Chris Mason , Gao Xiang , Chao Yu , Yue Hu , Jeffle Xu , Sandeep Dhavale , Hongbo Li , Chunhai Guo , Jan Kara , Theodore Ts'o , Andreas Dilger , Jaegeuk Kim , OGAWA Hirofumi , David Woodhouse , Richard Weinberger , Dave Kleikamp , Ryusuke Konishi , Viacheslav Dubeyko , Konstantin Komarov , Mark Fasheh , Joel Becker , Joseph Qi , Mike Marshall , Martin Brandenburg , Miklos Szeredi , Phillip Lougher , Carlos Maiolino , Hugh Dickins , Baolin Wang , Andrew Morton , Namjae Jeon , Sungjong Seo , Yuezhang Mo , Alexander Aring , Andreas Gruenbacher , Jonathan Corbet , "Matthew Wilcox (Oracle)" , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , Xiubo Li , Ilya Dryomov , Trond Myklebust , Anna Schumaker , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Bharath SM , Hans de Goede , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@lists.linux.dev, devel@lists.orangefs.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, gfs2@lists.linux.dev, linux-doc@vger.kernel.org, v9fs@lists.linux.dev, ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org Subject: Re: [PATCH 00/24] vfs: require filesystems to explicitly opt-in to lease support Message-ID: References: <20260108-setlease-6-20-v1-0-ea4dec9b67fa@kernel.org> <8af369636c32b868f83669c49aea708ca3b894ac.camel@kernel.org> <20260113-mondlicht-raven-82fc4eb70e9d@brauner> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260113-mondlicht-raven-82fc4eb70e9d@brauner> X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On Tue, Jan 13, 2026 at 09:54:15AM +0100, Christian Brauner wrote: > I don't think we want to expose cgroupfs via NFS that's super weird. > It's like remote partial resource management and it would be very > strange if a remote process suddenly would be able to move things around > in the cgroup tree. So I would prefer to not do this. > > So my preference would be to really sever file handles from the export > mechanism so that we can allow stuff like pidfs and nsfs and cgroupfs to > use file handles via name_to_handle_at() and open_by_handle_at() without > making them exportable. I don't understand this discussion. If someone really wants to expose say cgroupfs to the network they'll find a way, be that using a userspace nfs server, samba, 9p or a custom fuse thing. What's the benefit of explicitly prohibiting a knfsd export? (not that I think any of this makes much sense to start with) ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/