ocfs2: Wrap ocfs2_extent_contig in ocfs2_extent_tree.
Add a new operation eo_ocfs2_extent_contig int the extent tree's
operations vector. So that with the new refcount tree, We want
this so that refcount trees can always return CONTIG_NONE and
prevent extent merging.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index ab4d2b59..75e65df3 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -52,7 +52,17 @@
#include "buffer_head_io.h"
+enum ocfs2_contig_type {
+ CONTIG_NONE = 0,
+ CONTIG_LEFT,
+ CONTIG_RIGHT,
+ CONTIG_LEFTRIGHT,
+};
+static enum ocfs2_contig_type
+ ocfs2_extent_rec_contig(struct super_block *sb,
+ struct ocfs2_extent_rec *ext,
+ struct ocfs2_extent_rec *insert_rec);
/*
* Operations for a specific extent tree type.
*
@@ -122,6 +132,16 @@
* to 0 (unlimited). Optional.
*/
void (*eo_fill_max_leaf_clusters)(struct ocfs2_extent_tree *et);
+
+ /*
+ * ->eo_extent_contig test whether the 2 ocfs2_extent_rec
+ * are contiguous or not. Optional. Don't need to set it if use
+ * ocfs2_extent_rec as the tree leaf.
+ */
+ enum ocfs2_contig_type
+ (*eo_extent_contig)(struct ocfs2_extent_tree *et,
+ struct ocfs2_extent_rec *ext,
+ struct ocfs2_extent_rec *insert_rec);
};
@@ -458,6 +478,19 @@
type);
}
+static inline enum ocfs2_contig_type
+ ocfs2_et_extent_contig(struct ocfs2_extent_tree *et,
+ struct ocfs2_extent_rec *rec,
+ struct ocfs2_extent_rec *insert_rec)
+{
+ if (et->et_ops->eo_extent_contig)
+ return et->et_ops->eo_extent_contig(et, rec, insert_rec);
+
+ return ocfs2_extent_rec_contig(
+ ocfs2_metadata_cache_get_super(et->et_ci),
+ rec, insert_rec);
+}
+
static inline int ocfs2_et_insert_check(struct ocfs2_extent_tree *et,
struct ocfs2_extent_rec *rec)
{
@@ -736,17 +769,9 @@
return ret;
}
-enum ocfs2_contig_type {
- CONTIG_NONE = 0,
- CONTIG_LEFT,
- CONTIG_RIGHT,
- CONTIG_LEFTRIGHT,
-};
-
-
/*
* NOTE: ocfs2_block_extent_contig(), ocfs2_extents_adjacent() and
- * ocfs2_extent_contig only work properly against leaf nodes!
+ * ocfs2_extent_rec_contig only work properly against leaf nodes!
*/
static int ocfs2_block_extent_contig(struct super_block *sb,
struct ocfs2_extent_rec *ext,
@@ -772,9 +797,9 @@
}
static enum ocfs2_contig_type
- ocfs2_extent_contig(struct super_block *sb,
- struct ocfs2_extent_rec *ext,
- struct ocfs2_extent_rec *insert_rec)
+ ocfs2_extent_rec_contig(struct super_block *sb,
+ struct ocfs2_extent_rec *ext,
+ struct ocfs2_extent_rec *insert_rec)
{
u64 blkno = le64_to_cpu(insert_rec->e_blkno);
@@ -4400,7 +4425,7 @@
if (split_rec->e_cpos == el->l_recs[index].e_cpos)
ret = CONTIG_RIGHT;
} else {
- ret = ocfs2_extent_contig(sb, rec, split_rec);
+ ret = ocfs2_et_extent_contig(et, rec, split_rec);
}
}
@@ -4445,7 +4470,7 @@
if (rec) {
enum ocfs2_contig_type contig_type;
- contig_type = ocfs2_extent_contig(sb, rec, split_rec);
+ contig_type = ocfs2_et_extent_contig(et, rec, split_rec);
if (contig_type == CONTIG_LEFT && ret == CONTIG_RIGHT)
ret = CONTIG_LEFTRIGHT;
@@ -4473,8 +4498,8 @@
BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {
- contig_type = ocfs2_extent_contig(ocfs2_metadata_cache_get_super(et->et_ci),
- &el->l_recs[i], insert_rec);
+ contig_type = ocfs2_et_extent_contig(et, &el->l_recs[i],
+ insert_rec);
if (contig_type != CONTIG_NONE) {
insert->ins_contig_index = i;
break;
