In order to detect whether the current kernel supports XFS shrinking.
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Gao Xiang <hsiangkao@xxxxxxxxxx>
---
common/xfs | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/common/xfs b/common/xfs
index 69f76d6e..a0a4032a 100644
--- a/common/xfs
+++ b/common/xfs
@@ -766,6 +766,26 @@ _require_xfs_mkfs_without_validation()
fi
}
+_require_xfs_scratch_shrink()
+{
+ _require_scratch
+ _require_command "$XFS_GROWFS_PROG" xfs_growfs
+
+ _scratch_mkfs_xfs | _filter_mkfs 2>$tmp.mkfs >/dev/null
+ . $tmp.mkfs
+ _scratch_mount
+ # here just to check if kernel supports, no need do more extra work
+ errmsg=$($XFS_GROWFS_PROG -D$((dblocks-1)) "$SCRATCH_MNT" 2>&1)
+ if [ "$?" -ne 0 ]; then
+ echo "$errmsg" | grep 'XFS_IOC_FSGROWFSDATA xfsctl failed: Invalid argument' > /dev/null && \
+ _notrun "kernel does not support shrinking"
+ echo "$errmsg" | grep 'data size .* too small, old size is ' > /dev/null && \
+ _notrun "xfsprogs does not support shrinking"
+ _fail "$XFS_GROWFS_PROG failed unexpectedly: $errmsg"
+ fi
+ _scratch_unmount
+}
+
# XFS ability to change UUIDs on V5/CRC filesystems
#
_require_meta_uuid()
--
2.27.0
