[PATCH] f2fs/009: fix race condition in orphan inode test

[Chao Yu <chao@kernel.org>]

f2fs/009     81s ... [failed, exit status 1]- output mismatch (see /share/git/fstests/results//f2fs/009.out.bad)
    --- tests/f2fs/009.out      2026-06-12 08:46:32.819432390 +0800
    +++ /share/git/fstests/results//f2fs/009.out.bad    2026-08-17 13:09:35.000000000 +0800
    @@ -1,2 +1,3 @@
     QA output created by 009
    -Silence is golden
    +can't find corruption
    +(see /share/git/fstests/results//f2fs/009.full for details)
    ...
    (Run 'diff -u /share/git/fstests/tests/f2fs/009.out /share/git/fstests/results//f2fs/009.out.bad'  to see the entire diff)

HINT: You _MAY_ be missing f2fs-tools fix:
      958cd6e fsck.f2fs: support to repair corrupted i_links

f2fs_io write ... atomic_commit ... 5000 runs in the background and has
an initial delay before invoking F2FS_IOC_START_ATOMIC_WRITE. Without a
sleep in the test script, rm and _scratch_shutdown -f run immediately
before f2fs_io enters atomic mode, causing f2fs_io to fail and
preventing the orphan inode from being committed to the on-disk
checkpoint.

Add a 2-second sleep to let f2fs_io enter atomic mode, record its PID,
then shutdown -f to ensure the orphan inode is written to the checkpoint,
and clean up the background process properly.

Signed-off-by: Chao Yu <chao@kernel.org>
---
 tests/f2fs/009 | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tests/f2fs/009 b/tests/f2fs/009
index afb3bc98f..df8bef96c 100755
--- a/tests/f2fs/009
+++ b/tests/f2fs/009
@@ -106,10 +106,14 @@ check_links 0 0
 touch $filename
 ino=`stat -c '%i' $filename`
 $F2FS_IO_PROG write 1 0 1 zero atomic_commit $filename 5000 >> $seqres.full 2>&1 &
+pid=$!
+sleep 2
 stat $filename >> $seqres.full
 rm $filename
 _scratch_shutdown -f
-sleep 6
+sleep 4
+kill $pid &> /dev/null
+wait $pid &> /dev/null
 check_links 1 0 $ino
 
 # hardlink
-- 
2.49.0