On Mon, Mar 29, 2021 at 12:18:25AM +0800, Eryu Guan wrote:

On Mon, Mar 15, 2021 at 07:19:24PM +0800, Gao Xiang wrote:

quoted

In order to detect whether the current kernel supports XFS shrinking.

Signed-off-by: Gao Xiang <redacted>
---
 common/xfs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/common/xfs b/common/xfs
index 2156749d..ea3b6cab 100644
--- a/common/xfs
+++ b/common/xfs

@@ -432,6 +432,17 @@ _supports_xfs_scrub()
 	return 0
 }
 
+_require_xfs_shrink()
+{
+	_require_scratch

_require_command "$XFS_GROWFS_PROG" xfs_growfs

will update.

quoted

+
+	_scratch_mkfs_xfs > /dev/null
+	_scratch_mount
+	$XFS_GROWFS_PROG -D1 "$SCRATCH_MNT" 2>&1 | grep -q 'Invalid argument' || \
+		_notrun "kernel does not support shrinking"

Better to describe the behavior here to explain why EINVAL means kernel
supports shrink.

hmmm.. I also don't think this check is correct now. Maybe try to shrink
one fs-block would be better. Will update later.

Thanks,
Gao Xiang

Thanks,
Eryu

quoted

+	_scratch_unmount
+}
+
 # run xfs_check and friends on a FS.
 _check_xfs_filesystem()
 {
-- 
2.27.0