btrfs-debug-tree: add -r option to print only the roots

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

diff --git a/debug-tree.c b/debug-tree.c
index 34cefe9..91e0064 100644 (file)
--- a/debug-tree.c
+++ b/debug-tree.c
@@ -76,6 +76,7 @@ int main(int ac, char **av)
        int slot;
        int extent_only = 0;
        int device_only = 0;
+       int roots_only = 0;
        u64 block_only = 0;
        struct btrfs_root *tree_root_scan;
 
@@ -83,7 +84,7 @@ int main(int ac, char **av)
 
        while(1) {
                int c;
-               c = getopt(ac, av, "deb:");
+               c = getopt(ac, av, "deb:r");
                if (c < 0)
                        break;
                switch(c) {
@@ -93,6 +94,9 @@ int main(int ac, char **av)
                        case 'd':
                                device_only = 1;
                                break;
+                       case 'r':
+                               roots_only = 1;
+                               break;
                        case 'b':
                                block_only = atoll(optarg);
                                break;
@@ -134,13 +138,22 @@ int main(int ac, char **av)
        }
 
        if (!extent_only) {
-               printf("root tree\n");
-               btrfs_print_tree(root->fs_info->tree_root,
-                                root->fs_info->tree_root->node, 1);
+               if (roots_only) {
+                       printf("root tree: %llu level %d\n",
+                            (unsigned long long)root->fs_info->tree_root->node->start,
+                            btrfs_header_level(root->fs_info->tree_root->node));
+                       printf("chunk tree: %llu level %d\n",
+                            (unsigned long long)root->fs_info->chunk_root->node->start,
+                            btrfs_header_level(root->fs_info->chunk_root->node));
+               } else {
+                       printf("root tree\n");
+                       btrfs_print_tree(root->fs_info->tree_root,
+                                        root->fs_info->tree_root->node, 1);
 
-               printf("chunk tree\n");
-               btrfs_print_tree(root->fs_info->chunk_root,
-                                root->fs_info->chunk_root->node, 1);
+                       printf("chunk tree\n");
+                       btrfs_print_tree(root->fs_info->chunk_root,
+                                        root->fs_info->chunk_root->node, 1);
+               }
        }
        tree_root_scan = root->fs_info->tree_root;
 
@@ -253,8 +266,14 @@ again:
                        } else if (!skip) {
                                printf(" tree ");
                                btrfs_print_key(&disk_key);
-                               printf(" \n");
-                               btrfs_print_tree(tree_root_scan, buf, 1);
+                               if (roots_only) {
+                                       printf(" %llu level %d\n",
+                                              (unsigned long long)buf->start,
+                                              btrfs_header_level(buf));
+                               } else {
+                                       printf(" \n");
+                                       btrfs_print_tree(tree_root_scan, buf, 1);
+                               }
                        }
                }
                path.slots[0]++;