common: remove _require_no_rtinherit

All the remaining tests that use _require_no_rtinherit can be adapted to
ignore SCRATCH_RTDEV or to force files to be created on the data device.
This makes the helper unnecessary and increases test coverage, so remove
this helper.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

tests/xfs/205

@@ -23,10 +23,13 @@ _supported_fs xfs
 
 # single AG will cause xfs_repair to fail checks.
 _require_scratch_nocheck
-_require_no_rtinherit
 
 rm -f $seqres.full
 
+# Disable the scratch rt device to avoid test failures relating to the rt
+# bitmap consuming all the free space in our small data device.
+unset SCRATCH_RTDEV
+
 fsblksz=1024
 _scratch_mkfs_xfs -d size=$((32768*fsblksz)) -b size=$fsblksz >> $seqres.full 2>&1
 _scratch_mount

tests/xfs/306

@@ -34,12 +34,15 @@ _cleanup()
 _supported_fs xfs
 
 _require_scratch_nocheck	# check complains about single AG fs
-_require_no_rtinherit
 _require_xfs_io_command "fpunch"
 _require_command $UUIDGEN_PROG uuidgen
 
 rm -f $seqres.full
 
+# Disable the scratch rt device to avoid test failures relating to the rt
+# bitmap consuming all the free space in our small data device.
+unset SCRATCH_RTDEV
+
 # Create a small fs with a large directory block size. We want to fill up the fs
 # quickly and then create multi-fsb dirblocks over fragmented free space.
 _scratch_mkfs_xfs -d size=20m -n size=64k >> $seqres.full 2>&1

tests/xfs/318

@@ -32,7 +32,6 @@ _supported_fs xfs
 _require_scratch
 _require_error_injection
 _require_xfs_io_error_injection "rmap_finish_one"
-_require_no_rtinherit
 
 rm -f $seqres.full
 
@@ -43,6 +42,10 @@ echo "Format filesystem"
 _scratch_mkfs >/dev/null 2>&1
 _scratch_mount >> $seqres.full
 
+# This test depends on specific behaviors of the data device, so create all
+# files on it.
+$XFS_IO_PROG -c 'chattr -t' $SCRATCH_MNT
+
 echo "Create files"
 touch $SCRATCH_MNT/file1
 

tests/xfs/444

@@ -39,11 +39,15 @@ _require_scratch
 _require_test_program "punch-alternating"
 _require_xfs_io_command "falloc"
 _require_xfs_db_write_array
-_require_no_rtinherit
 
 # This is only a v5 filesystem problem
 _require_scratch_xfs_crc
 
+# Disable the scratch rt device to avoid test failures relating to the rt
+# bitmap consuming free space in our small data device and throwing off the
+# filestreams allocator.
+unset SCRATCH_RTDEV
+
 mount_loop() {
 	if ! _try_scratch_mount >> $seqres.full 2>&1; then
 		echo "scratch mount failed" >> $seqres.full