ocfs2: Add ocfs2_trim_fs for SSD trim support.
Add ocfs2_trim_fs to support trimming freed clusters in the
volume. A range will be given and all the freed clusters greater
than minlen will be discarded to the block layer.
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index 3bd08a0..ca381c5 100644
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -239,6 +239,7 @@
struct buffer_head **leaf_bh);
int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster);
+int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range);
/*
* Helper function to look at the # of clusters in an extent record.
*/