[LU-17583] Unclean direntry after rename

• Type: Bug
• Resolution: Unresolved
• Priority: Major
• Environment: Alma 8 Lustre 2.15.4 client ; Centos 7 Lustre 2.12.9 server
• Severity: 3
• Assignee: Etienne Aujames
• Reporter: Etienne Aujames

Description

Environment:

• No DNE
• No DOM
• Opencache disable

Reproducer:

On the first client:

[root@client1 test_bug_2.12-2.15]# mkdir foo
[root@client1 test_bug_2.12-2.15]# for i in 1 2 3 4 ; do dd if=/dev/zero bs=1k count=1k of=foo/$i  ; done
[root@client1 test_bug_2.12-2.15]# cd foo
[root@client1 foo]# tail -f 2
... 

On the second client:

[root@client2 test_bug_2.12-2.15]# mv foo/ foo.new ; mkdir foo ; mv foo.new foo/foo
[root@client2 test_bug_2.12-2.15]# find
.
./foo
./foo/foo
./foo/foo/4
./foo/foo/1
./foo/foo/2
./foo/foo/3 

Back on the first one:

^C
[root@client1 foo]# ls
1  2  3  4
[root@client1 foo]# cd ..
[root@client1 test_bug_2.12-2.15]# ls foo/
1  2  3  4 

Here, we should have:

[root@client1 test_bug_2.12-2.15]# ls foo/
foo

Then, if the directory is touched then the directory entry is sync:

[root@client1 test_bug_2.12-2.15]# touch foo/2
[root@client1 test_bug_2.12-2.15]# ls foo/
foo
[root@client1 test_bug_2.12-2.15]# ls foo/foo/
1  2  3  4