[Ocfs2-tools-devel] [PATCH 05/20] ocfs2: Add ocfs2_gd_is_discontig.

[Tao Ma]

Add ocfs2_gd_is_discontig so that we can test whether
a group descriptor is discontiguous or not.

Signed-off-by: Tao Ma <tao.ma at oracle.com>
---
 include/ocfs2-kernel/ocfs2_fs.h |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/include/ocfs2-kernel/ocfs2_fs.h b/include/ocfs2-kernel/ocfs2_fs.h
index a913f7c..45e90f2 100644
--- a/include/ocfs2-kernel/ocfs2_fs.h
+++ b/include/ocfs2-kernel/ocfs2_fs.h
@@ -1622,5 +1622,18 @@ static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de,
 	de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
 }
 
+static inline int ocfs2_gd_is_discontig(struct ocfs2_group_desc *gd)
+{
+	if ((offsetof(struct ocfs2_group_desc, bg_bitmap) + gd->bg_size) !=
+	    offsetof(struct ocfs2_group_desc, bg_list))
+		return 0;
+	/*
+	 * Only valid to check l_next_free_rec if
+	 * bg_bitmap + bg_size == bg_list
+	 */
+	if (!gd->bg_list.l_next_free_rec)
+		return 0;
+	return 1;
+}
 #endif  /* _OCFS2_FS_H */
 
-- 
1.5.5