Hello,
I'm seeing an issue where stat (and ls) reports wrong mode bits on
referral directories. Actual permissions are 755; but Linux client
displays 555. This causes some operations like setattr (chmod) to
fail. Traversing to the directory fixes the issue.
Kernel version : 5.8.6-2.el7.elrepo.x86_64
[nfstest@centos77 ~]$ mkdir /mnt/nfsh1/dir.{1..5}
[nfstest@centos77 ~]$ ls -l /mnt/nfsh1
total 3
dr-xr-xr-x. 2 nfstest wheel 2 Sep 3 17:55 dir.1
drwxr-xr-x. 2 nfstest wheel 2 Sep 3 17:55 dir.2
dr-xr-xr-x. 2 nfstest wheel 2 Sep 3 17:55 dir.3
dr-xr-xr-x. 2 nfstest wheel 2 Sep 3 17:55 dir.4
dr-xr-xr-x. 2 nfstest wheel 2 Sep 3 17:55 dir.5
[nfstest@centos77 ~]$ stat /mnt/nfsh1/dir.1
File: ‘/mnt/nfsh1/dir.1’
Size: 2 Blocks: 1 IO Block: 1048576 directory
Device: 30h/48d Inode: 3940649673949864 Links: 2
Access: (0555/dr-xr-xr-x) Uid: ( 2000/ nfstest) Gid: ( 10/ wheel)
Context: system_u:object_r:nfs_t:s0
Access: 2020-09-03 17:55:59.082327209 -0400
Modify: 2020-09-03 17:55:59.082327209 -0400
Change: 2020-09-03 17:55:59.082327209 -0400
Birth: -
[nfstest@centos77 ~]$ ls /mnt/nfsh1/dir.1 <-- Try traversing into the
dir, see the mode bits in stat after traversal.
[nfstest@centos77 ~]$ stat /mnt/nfsh1/dir.1
File: ‘/mnt/nfsh1/dir.1’
Size: 2 Blocks: 1 IO Block: 32768 directory
Device: 32h/50d Inode: 3940649673949864 Links: 2
Access: (0755/drwxr-xr-x) Uid: ( 2000/ nfstest) Gid: ( 10/ wheel)
Context: system_u:object_r:nfs_t:s0
Access: 2020-09-03 17:55:59.082327209 -0400
Modify: 2020-09-03 17:55:59.082327209 -0400
Change: 2020-09-03 17:55:59.082327209 -0400
Birth: -
Attached is the tcpdump for requests. It looks like the server sends
back correct attributes; but the client somehow is ignoring it. Any
ideas why?
Thanks,
Pradeep
Attachment:
referral_issue.pcap
Description: Binary data
