[PATCH 03/12] libfrog: try the v4 fs geometry ioctl after failing the v5 ioctl

["Darrick J. Wong" <darrick.wong@xxxxxxxxxx>]

From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

If a v5 fs geometry query fails, try the v4 interface before falling
back to the v1 interface.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 libfrog/fsgeom.c |    4 ++++
 1 file changed, 4 insertions(+)


diff --git a/libfrog/fsgeom.c b/libfrog/fsgeom.c
index a3b748f8..06e4e663 100644
--- a/libfrog/fsgeom.c
+++ b/libfrog/fsgeom.c
@@ -84,6 +84,10 @@ xfrog_geometry(
 	if (!ret)
 		return 0;
 
+	ret = ioctl(fd, XFS_IOC_FSGEOMETRY_V4, fsgeo);
+	if (!ret)
+		return 0;
+
 	return ioctl(fd, XFS_IOC_FSGEOMETRY_V1, fsgeo);
 }