[PATCH] ext4/048: Fix hangup due to no free inodes

Ojaswin Mujoo
2025-10-28T07:18:53Z

We currently mkfs a 128MB filesystem, which gives use ~2048 free inodes
on 64k blocksize. The test then keeps adding new files to a directory to
trigger an htree split. For 64k this takes more than the total free
inodes, which causes touch to return -ENOSPC. This leads to the while
loop in induce_node_split() to never finish.

To fix this:
1. Format a 1G FS which gives us atleast 16K inodes to work with.
2. _fail if there's any error while trying to induce node split, so we
dont get stuck in loop

Fixes: 466ddbfd1151 ("ext4: add test for ext4_dir_entry2 wipe")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
---
tests/ext4/048 | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tests/ext4/048 b/tests/ext4/048
index 2031c8c8..6343ff3a 100755
--- a/tests/ext4/048
+++ b/tests/ext4/048
@@ -69,6 +69,11 @@ induce_node_split() {
while [[ "$(stat --printf="%s" $testdir)" == "$dir_size" ]]; do
file_num=$(($file_num + 1))
touch $testdir/test"$(printf "%04d" $file_num)"
+ local ret=$?
+ if [[ $ret -ne 0 ]]
+ then
+ _fail "ERROR induce_node_split(): $ret"
+ fi
done
_scratch_unmount >> $seqres.full 2>&1
}
@@ -81,7 +86,7 @@ test_file1="test0001"
test_file2="test0002"
test_file3="test0003"

-_scratch_mkfs_sized $((128 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mkfs_sized $((1 * 1024 * 1024 * 1024)) >> $seqres.full 2>&1

# create scratch dir for testing
# create some files with no name a substr of another name so we can grep later
--
2.51.0