[PATCH] generic/402: Make timestamp range check conditional

[Deepa Dinamani <deepa.kernel@gmail.com>]

Addition of fs-specific timestamp range checking was added
in 188d20bcd1eb ("vfs: Add file timestamp range support").

Add a check for whether the kernel supports the limits check
before running the associated test.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
---
 common/rc         | 11 +++++++++++
 tests/generic/402 |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/common/rc b/common/rc
index 816588d6..472db995 100644
--- a/common/rc
+++ b/common/rc
@@ -1981,6 +1981,17 @@ _run_aiodio()
     return $status
 }
 
+_require_kernel_timestamp_range()
+{
+	# 128-byte inodes do not have room for extended timestamp
+	MKFS_OPTIONS=-I128 _scratch_mkfs_ext4 &>> $seqres.full 2>&1 || _fail "ext4 mkfs failed"
+
+	mount -t ext4 ${SCRATCH_DEV} ${SCRATCH_MNT}
+	_check_dmesg_for "ext4 filesystem being mounted at ${SCRATCH_MNT} supports timestamps until 2038" || \
+		_notrun "Kernel does not support timestamp limits"
+	umount ${SCRATCH_MNT}
+}
+
 _require_timestamp_range()
 {
 	local device=${1:-$TEST_DEV}
diff --git a/tests/generic/402 b/tests/generic/402
index 0392c258..2be94c54 100755
--- a/tests/generic/402
+++ b/tests/generic/402
@@ -30,6 +30,7 @@ rm -f $seqres.full
 _supported_fs generic
 _supported_os Linux
 _require_scratch
+_require_check_dmesg
 _require_xfs_io_command utimes
 
 # Compare file timestamps obtained from stat
@@ -79,6 +80,8 @@ run_test()
 	done
 }
 
+_require_kernel_timestamp_range
+
 _scratch_mkfs &>> $seqres.full 2>&1 || _fail "mkfs failed"
 _require_timestamp_range $SCRATCH_DEV
 
-- 
2.17.1