Btrfs: Defrag: only walk into nodes with the defrag bit set

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index e1557e573d74243348ab38a371c32cb97802953e..984f4745440eb1b231be859afd606689e7bdcbae 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -280,7 +280,6 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
                *last_ret = search_start;
                if (parent_level == 1)
                        btrfs_clear_buffer_defrag(tmp);
-               btrfs_set_buffer_defrag_done(tmp);
                free_extent_buffer(tmp);
        }
        return err;

diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index d31c21ac6f237bf91926eff7664d7c3b9d988fe9..f86eccf511b9b0642efe07cf4ae1b3fdc62a8b25 100644 (file)
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -87,8 +87,8 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
                if (cache_only) {
                        next = btrfs_find_tree_block(root, bytenr,
                                           btrfs_level_size(root, *level - 1));
-                       /* FIXME, test for defrag */
-                       if (!next || !btrfs_buffer_uptodate(next)) {
+                       if (!next || !btrfs_buffer_uptodate(next) ||
+                           !btrfs_buffer_defrag(next)) {
                                free_extent_buffer(next);
                                path->slots[*level]++;
                                continue;
@@ -147,7 +147,8 @@ static int defrag_walk_up(struct btrfs_trans_handle *trans,
                        root->defrag_level = i;
                        return 0;
                } else {
-                       if (*level > 1 && path->nodes[*level] != root->node) {
+                       if (*level > 1 && path->nodes[*level] != root->node &&
+                           btrfs_buffer_defrag(path->nodes[*level])) {
                                struct extent_buffer *next;
                                u64 last;
                                int ret;
@@ -168,7 +169,6 @@ static int defrag_walk_up(struct btrfs_trans_handle *trans,
                        }
 
                        btrfs_clear_buffer_defrag(path->nodes[*level]);
-                       btrfs_clear_buffer_defrag_done(path->nodes[*level]);
                        free_extent_buffer(path->nodes[*level]);
                        path->nodes[*level] = NULL;
                        *level = i + 1;