1 files changed, 35 insertions, 22 deletions

diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c
index 61e70d719b4..63ee35080fb 100644
--- a/fs/nilfs2/btree.c
+++ b/fs/nilfs2/btree.c
@@ -122,10 +122,29 @@ static void nilfs_btree_clear_path(const struct nilfs_btree *btree,
         }
 }
 
-
 /*
  * B-tree node operations
  */
+static int nilfs_btree_get_block(const struct nilfs_btree *btree, __u64 ptr,
+                                 struct buffer_head **bhp)
+{
+        struct address_space *btnc =
+                &NILFS_BMAP_I((struct nilfs_bmap *)btree)->i_btnode_cache;
+        return nilfs_btnode_get(btnc, ptr, 0, bhp, 0);
+}
+
+static int nilfs_btree_get_new_block(const struct nilfs_btree *btree,
+                                     __u64 ptr, struct buffer_head **bhp)
+{
+        struct address_space *btnc =
+                &NILFS_BMAP_I((struct nilfs_bmap *)btree)->i_btnode_cache;
+        int ret;
+
+        ret = nilfs_btnode_get(btnc, ptr, 0, bhp, 1);
+        if (!ret)
+                set_buffer_nilfs_volatile(*bhp);
+        return ret;
+}
 
 static inline int
 nilfs_btree_node_get_flags(const struct nilfs_btree *btree,
@@ -487,8 +506,7 @@ static int nilfs_btree_do_lookup(const struct nilfs_btree *btree,
         path[level].bp_index = index;
 
         for (level--; level >= minlevel; level--) {
-                ret = nilfs_bmap_get_block(&btree->bt_bmap, ptr,
-                                           &path[level].bp_bh);
+                ret = nilfs_btree_get_block(btree, ptr, &path[level].bp_bh);
                 if (ret < 0)
                         return ret;
                 node = nilfs_btree_get_nonroot_node(btree, path, level);
@@ -534,8 +552,7 @@ static int nilfs_btree_do_lookup_last(const struct nilfs_btree *btree,
         path[level].bp_index = index;
 
         for (level--; level > 0; level--) {
-                ret = nilfs_bmap_get_block(&btree->bt_bmap, ptr,
-                                           &path[level].bp_bh);
+                ret = nilfs_btree_get_block(btree, ptr, &path[level].bp_bh);
                 if (ret < 0)
                         return ret;
                 node = nilfs_btree_get_nonroot_node(btree, path, level);
@@ -923,8 +940,7 @@ static int nilfs_btree_prepare_insert(struct nilfs_btree *btree,
                 if (pindex > 0) {
                         sibptr = nilfs_btree_node_get_ptr(btree, parent,
                                                           pindex - 1);
-                        ret = nilfs_bmap_get_block(&btree->bt_bmap, sibptr,
-                                                   &bh);
+                        ret = nilfs_btree_get_block(btree, sibptr, &bh);
                         if (ret < 0)
                                 goto err_out_child_node;
                         sib = (struct nilfs_btree_node *)bh->b_data;
@@ -943,8 +959,7 @@ static int nilfs_btree_prepare_insert(struct nilfs_btree *btree,
                     nilfs_btree_node_get_nchildren(btree, parent) - 1) {
                         sibptr = nilfs_btree_node_get_ptr(btree, parent,
                                                           pindex + 1);
-                        ret = nilfs_bmap_get_block(&btree->bt_bmap, sibptr,
-                                                   &bh);
+                        ret = nilfs_btree_get_block(btree, sibptr, &bh);
                         if (ret < 0)
                                 goto err_out_child_node;
                         sib = (struct nilfs_btree_node *)bh->b_data;
@@ -965,9 +980,9 @@ static int nilfs_btree_prepare_insert(struct nilfs_btree *btree,
                         &btree->bt_bmap, &path[level].bp_newreq);
                 if (ret < 0)
                         goto err_out_child_node;
-                ret = nilfs_bmap_get_new_block(&btree->bt_bmap,
-                                               path[level].bp_newreq.bpr_ptr,
-                                               &bh);
+                ret = nilfs_btree_get_new_block(btree,
+                                                path[level].bp_newreq.bpr_ptr,
+                                                &bh);
                 if (ret < 0)
                         goto err_out_curr_node;
 
@@ -997,8 +1012,8 @@ static int nilfs_btree_prepare_insert(struct nilfs_btree *btree,
                 &btree->bt_bmap, &path[level].bp_newreq);
         if (ret < 0)
                 goto err_out_child_node;
-        ret = nilfs_bmap_get_new_block(&btree->bt_bmap,
-                                       path[level].bp_newreq.bpr_ptr, &bh);
+        ret = nilfs_btree_get_new_block(btree, path[level].bp_newreq.bpr_ptr,
+                                        &bh);
         if (ret < 0)
                 goto err_out_curr_node;
 
@@ -1320,8 +1335,7 @@ static int nilfs_btree_prepare_delete(struct nilfs_btree *btree,
                         /* left sibling */
                         sibptr = nilfs_btree_node_get_ptr(btree, parent,
                                                           pindex - 1);
-                        ret = nilfs_bmap_get_block(&btree->bt_bmap, sibptr,
-                                                   &bh);
+                        ret = nilfs_btree_get_block(btree, sibptr, &bh);
                         if (ret < 0)
                                 goto err_out_curr_node;
                         sib = (struct nilfs_btree_node *)bh->b_data;
@@ -1342,8 +1356,7 @@ static int nilfs_btree_prepare_delete(struct nilfs_btree *btree,
                         /* right sibling */
                         sibptr = nilfs_btree_node_get_ptr(btree, parent,
                                                           pindex + 1);
-                        ret = nilfs_bmap_get_block(&btree->bt_bmap, sibptr,
-                                                   &bh);
+                        ret = nilfs_btree_get_block(btree, sibptr, &bh);
                         if (ret < 0)
                                 goto err_out_curr_node;
                         sib = (struct nilfs_btree_node *)bh->b_data;
@@ -1500,7 +1513,7 @@ static int nilfs_btree_check_delete(struct nilfs_bmap *bmap, __u64 key)
                 if (nchildren > 1)
                         return 0;
                 ptr = nilfs_btree_node_get_ptr(btree, root, nchildren - 1);
-                ret = nilfs_bmap_get_block(bmap, ptr, &bh);
+                ret = nilfs_btree_get_block(btree, ptr, &bh);
                 if (ret < 0)
                         return ret;
                 node = (struct nilfs_btree_node *)bh->b_data;
@@ -1541,7 +1554,7 @@ static int nilfs_btree_gather_data(struct nilfs_bmap *bmap,
                 nchildren = nilfs_btree_node_get_nchildren(btree, root);
                 WARN_ON(nchildren > 1);
                 ptr = nilfs_btree_node_get_ptr(btree, root, nchildren - 1);
-                ret = nilfs_bmap_get_block(bmap, ptr, &bh);
+                ret = nilfs_btree_get_block(btree, ptr, &bh);
                 if (ret < 0)
                         return ret;
                 node = (struct nilfs_btree_node *)bh->b_data;
@@ -1598,7 +1611,7 @@ nilfs_btree_prepare_convert_and_insert(struct nilfs_bmap *bmap, __u64 key,
                 if (ret < 0)
                         goto err_out_dreq;
 
-                ret = nilfs_bmap_get_new_block(bmap, nreq->bpr_ptr, &bh);
+                ret = nilfs_btree_get_new_block(btree, nreq->bpr_ptr, &bh);
                 if (ret < 0)
                         goto err_out_nreq;
 
@@ -2167,7 +2180,7 @@ static int nilfs_btree_mark(struct nilfs_bmap *bmap, __u64 key, int level)
                 WARN_ON(ret == -ENOENT);
                 goto out;
         }
-        ret = nilfs_bmap_get_block(&btree->bt_bmap, ptr, &bh);
+        ret = nilfs_btree_get_block(btree, ptr, &bh);
         if (ret < 0) {
                 WARN_ON(ret == -ENOENT);
                 goto out;