1 files changed, 72 insertions, 0 deletions

diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
new file mode 100644
index 000000000000..594d23b5b24c
--- /dev/null
+++ b/fs/btrfs/print-tree.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "kerncompat.h"
+#include "radix-tree.h"
+#include "ctree.h"
+#include "disk-io.h"
+
+void print_leaf(struct leaf *l)
+{
+        int i;
+        int nr = l->header.nritems;
+        struct item *item;
+        struct extent_item *ei;
+        printf("leaf %lu total ptrs %d free space %d\n", l->header.blocknr, nr,
+               leaf_free_space(l));
+        fflush(stdout);
+        for (i = 0 ; i < nr ; i++) {
+                item = l->items + i;
+                printf("\titem %d key (%lu %u %lu) itemoff %d itemsize %d\n",
+                        i,
+                        item->key.objectid, item->key.flags, item->key.offset,
+                        item->offset, item->size);
+                fflush(stdout);
+                printf("\t\titem data %.*s\n", item->size, l->data+item->offset);
+                ei = (struct extent_item *)(l->data + item->offset);
+                printf("\t\textent data %u %lu\n", ei->refs, ei->owner);
+                fflush(stdout);
+        }
+}
+void print_tree(struct ctree_root *root, struct tree_buffer *t)
+{
+        int i;
+        int nr;
+        struct node *c;
+
+        if (!t)
+                return;
+        c = &t->node;
+        nr = c->header.nritems;
+        if (c->header.blocknr != t->blocknr)
+                BUG();
+        if (is_leaf(c->header.flags)) {
+                print_leaf((struct leaf *)c);
+                return;
+        }
+        printf("node %lu level %d total ptrs %d free spc %lu\n", t->blocknr,
+                node_level(c->header.flags), c->header.nritems,
+                NODEPTRS_PER_BLOCK - c->header.nritems);
+        fflush(stdout);
+        for (i = 0; i < nr; i++) {
+                printf("\tkey %d (%lu %u %lu) block %lu\n",
+                       i,
+                       c->keys[i].objectid, c->keys[i].flags, c->keys[i].offset,
+                       c->blockptrs[i]);
+                fflush(stdout);
+        }
+        for (i = 0; i < nr; i++) {
+                struct tree_buffer *next_buf = read_tree_block(root,
+                                                            c->blockptrs[i]);
+                struct node *next = &next_buf->node;
+                if (is_leaf(next->header.flags) &&
+                    node_level(c->header.flags) != 1)
+                        BUG();
+                if (node_level(next->header.flags) !=
+                        node_level(c->header.flags) - 1)
+                        BUG();
+                print_tree(root, next_buf);
+                tree_block_release(root, next_buf);
+        }
+
+}
+