common/xfs: Add a helper to get an inode fork's extent count

This commit adds the helper _scratch_get_iext_count() which returns an
inode fork's extent count.

Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>

diff --git a/common/xfs b/common/xfs
index 4469f045e082211aa7099754e7d234e898738545..fff65667c5e3dee7519d37889099677a4de7e357 100644 (file)
--- a/common/xfs
+++ b/common/xfs
@@ -975,6 +975,26 @@ _scratch_get_bmx_prefix() {
        return 1
 }
 
+_scratch_get_iext_count()
+{
+       local ino=$1
+       local whichfork=$2
+       local field=""
+
+       case $whichfork in
+               "attr")
+                       field=core.naextents
+                       ;;
+               "data")
+                       field=core.nextents
+                       ;;
+               *)
+                       return 1
+       esac
+
+       _scratch_xfs_get_metadata_field $field "inode $ino"
+}
+
 #
 # Ensures that we don't pass any mount options incompatible with XFS v4
 #