[PATCH] generic/365: Fix false failure when mapping ends with free space

[Ojaswin Mujoo <ojaswin@linux.ibm.com>]

If we have a small FS where the first free space mapping is also the
last mapping of the FS, then the following sub-test fails:

  echo "test whatever came after freesp"
  $XFS_IO_PROG -c "fsmap -d $((freesp_end + 2)) $((freesp_end + 3))" $SCRATCH_MNT

since there is nothing after the freespace. Fix this by punching a 1M
hole in a 3M file to ensure that the first free space is always
surrounded by allocated blocks.

Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
---
 tests/generic/365 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/generic/365 b/tests/generic/365
index 36cb2530..bbadae71 100755
--- a/tests/generic/365
+++ b/tests/generic/365
@@ -32,6 +32,10 @@ if ((blksz < 2048)); then
 	_notrun "test requires at least 4 bblocks per fsblock"
 fi
 
+# This makes sure there is free space surrounded by allocated blocks, which
+# is needed for some sub tests.
+$XFS_IO_PROG -fc 'falloc 0 3M' -c 'fpunch 1M 1M' -c 'fsync' $SCRATCH_MNT/f
+
 $XFS_IO_PROG -c 'fsmap' $SCRATCH_MNT >> $seqres.full
 
 find_freesp() {
-- 
2.49.0