[RFC PATCH v2 1/3] common/xfs: add a _require_xfs_shrink helper

Gao Xiang
2021-03-12T13:24:43Z

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

Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
---
use -D1 rather than -D0 since xfs_growfs would report unchanged size
instead.

common/xfs | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/common/xfs b/common/xfs
index 2156749d..326edacc 100644
--- a/common/xfs
+++ b/common/xfs
@@ -432,6 +432,16 @@ _supports_xfs_scrub()
return 0
}

+_require_xfs_shrink()
+{
+ _scratch_mkfs_xfs >/dev/null 2>&1
+
+ _scratch_mount
+ $XFS_GROWFS_PROG -D1 "$SCRATCH_MNT" 2>&1 | grep -q 'Invalid argument' || { \
+ _scratch_unmount; _notrun "kernel does not support shrinking"; }
+ _scratch_unmount
+}
+
# run xfs_check and friends on a FS.
_check_xfs_filesystem()
{
--
2.27.0