Return-Path: Received: from mail.cn.fujitsu.com ([183.91.158.132]:56989 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750975AbeCGGRF (ORCPT ); Wed, 7 Mar 2018 01:17:05 -0500 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id 8C01248AE762 for ; Wed, 7 Mar 2018 14:17:01 +0800 (CST) From: Lu Xinyu Subject: Inheritance of sgid in nfsv3 To: CC: Message-ID: Date: Wed, 7 Mar 2018 14:17:05 +0800 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-nfs-owner@vger.kernel.org List-ID: hi, folks I have client and server using nfsv3. The kernels are all 4.16-rc3. In client I mount a partition or a disk formatted in xfs/ext4 in /nfstest. It seems there is someting wrong with inheritance of sgid. I try the following operations in the client. > [root@localhost ]#id user1 > uid=1003(user1) gid=1006(testgroup1) groups=1006(testgroup1),1007(testgroup2) > [root@localhost ]# mount -t nfs -o vers=3 -o noac 192.168.56.9:/data/nfstest /mnt/test/ > [root@localhost ]# cd /mnt/test/ > [root@localhost ]# mkdir mainsub > [root@localhost ]# setfacl -d -m u:user2:rwx mainsub/ > [root@localhost ]# chown user1:testgroup1 mainsub/ > [root@localhost ]# runuser -u user1 -g testgroup1 mkdir mainsub/subdir1 > [root@localhost ]# runuser -u user1 -g testgroup2 mkdir mainsub/subdir2 > [root@localhost ]# ls -l mainsub/ > drwxrwsr-x+ 2 user1 testgroup1 4096 Mar 6 22:50 subdir1 > drwxrwxr-x+ 2 user1 testgroup1 4096 Mar 6 22:50 subdir2 The subdir2 losts SGID. But if the same operations are applied in the xfs or ext4 directedly, the SGID could be interited normally. > [root@localhost ]# ls -l mainsub/ > drwxrwsr-x+ 2 user1 testgroup1 4096 Mar 6 22:55 subdir1 > drwxrwsr-x+ 2 user1 testgroup1 4096 Mar 6 22:55 subdir2 Is this a bug of NFSv3? Lu Xinyu