[PATCH v2] generic/645: notrun if FS doesn't have enough free inodes/blocks

When running generic/645 with ext4 using 64k block size + bigalloc, the
test fails with ENOSPC because the filesystem runs out of inodes before
the test completes.

The test creates approximately 10,001 files, however, in this particular
configuration a standard 5G FS only has around ~5100 inodes resulting in
the ENOSPC failure.

Parse vfstest output to notrun the test incase we encounter this ENOSPC
instead of reporting it as a failure.

Reported-by: Disha Goel <[email protected]>
Signed-off-by: Ojaswin Mujoo <[email protected]>
---

* Changes since v1 [1] *

- Instead of using a helper, check for ENOSPC in vfstest output
  (Thanks for Darrick for suggestion)


[1] https://lore.kernel.org/fstests/[email protected]/
 tests/generic/645 | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tests/generic/645 b/tests/generic/645
index d6eb75e6..6498efe1 100755
--- a/tests/generic/645
+++ b/tests/generic/645
@@ -22,7 +22,13 @@ _wants_kernel_commit dacfd001eaf2 \
 echo "Silence is golden"
 
 $here/src/vfs/vfstest --test-nested-userns \
-	--device "$TEST_DEV" --mount "$TEST_DIR" --fstype "$FSTYP"
+	--device "$TEST_DEV" --mount "$TEST_DIR" --fstype "$FSTYP" \
+	> $tmp.vfstest 2>&1
 
+if grep -q "No space left on device" $tmp.vfstest; then
+	_notrun "$TEST_DEV ran out of free blocks/inodes"
+fi
+
+cat $tmp.vfstest
 status=$?
 exit
-- 
2.55.0