[PATCH] generic/027: use 300M FS to accommodate XFS limits

[David Disseldorp <ddiss@suse.de>]

As of xfsprogs commit 6e0ed3d1 ("mkfs: stop allowing tiny filesystems")
attempts to create XFS filesystems sized under 300M fail.

Lacking MIN_FSSIZE configuration, failure of _scratch_mkfs_sized() in
generic/027 doesn't halt the test, leading _scratch_mount() to mount any
previously created (full-size) filesystem. As a result create_file()
may loop near-endlessly awaiting ENOSPC.

Use a 300M sized filesystem to support XFS' limit, and explicitly check
for _scratch_mkfs_sized() failure to avoid endless loops if the limit
changes again in future.

Signed-off-by: David Disseldorp <ddiss@suse.de>
---
 tests/generic/027 | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tests/generic/027 b/tests/generic/027
index 47f1981d..4f8cf6d8 100755
--- a/tests/generic/027
+++ b/tests/generic/027
@@ -35,13 +35,14 @@ _require_scratch
 
 echo "Silence is golden"
 
-_scratch_mkfs_sized $((256 * 1024 * 1024)) >>$seqres.full 2>&1
+_scratch_mkfs_sized $((300 * 1024 * 1024)) >>$seqres.full 2>&1 \
+	|| _fail "_scratch_mkfs_sized failed"
 _scratch_mount
 
 echo "Reserve 2M space" >>$seqres.full
 $XFS_IO_PROG -f -c "pwrite 0 2m" $SCRATCH_MNT/testfile >>$seqres.full 2>&1
 echo "Fulfill the fs" >>$seqres.full
-$XFS_IO_PROG -f -c "pwrite 0 254m" $SCRATCH_MNT/bigfile >>$seqres.full 2>&1
+$XFS_IO_PROG -f -c "pwrite 0 298m" $SCRATCH_MNT/bigfile >>$seqres.full 2>&1
 echo "Remove reserved file" >>$seqres.full
 rm -f $SCRATCH_MNT/testfile
 
-- 
2.35.3