[LU-3240] The link count is not updated after the mkdir

Related — Fri, 20 Dec 2013 21:07:51 +0000

We sometimes saw incorrect link counts after the mkdir or remove directories.
The link counts seem not to be updated after create/remove directory.

We created a simple reproducer for this problem below.

#!/bin/sh -x 

TESTDIR=/lustre/linkcount_test
[ -d "$TESTDIR" ] && rm -rf $TESTDIR

mkdir $TESTDIR
cd $TESTDIR
ls
mkdir a b
ls
ls -adl $TESTDIR
rmdir b
ls -ald

# ./test.sh
+ TESTDIR=/lustre/linkcount_test
+ '[' -d /lustre/linkcount_test ']'
+ rm -rf /lustre/linkcount_test
+ mkdir /lustre/linkcount_test
+ cd /lustre/linkcount_test
+ ls
+ mkdir a b
+ ls
a  b
+ ls -adl /lustre/linkcount_test
drwxr-xr-x 2 root root 4096 Apr 30 02:52 /lustre/linkcount_test
          ^^^
          This should be 4 after two directories created.
+ rmdir b
+ ls -ald
drwxr-xr-x 3 root root 4096 Apr 30 02:52 .
          ^^^
          Updated after an directory is removed.

This problem happens on b2_1, b2_2 and b2_3, but not happens if both server and clients are running with current master.
However, master (server) - b2_1(client), we see same problem.

Whamcloud Community JIRA

[LU-3240] The link count is not updated after the mkdir