Btrfs-progs: add option to btrfs-debug-tree to print uuid tree only

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/btrfs-debug-tree.c b/btrfs-debug-tree.c
index 74d4d66..bdd4022 100644 (file)
--- a/btrfs-debug-tree.c
+++ b/btrfs-debug-tree.c
@@ -30,13 +30,14 @@
 
 static int print_usage(void)
 {
-       fprintf(stderr, "usage: btrfs-debug-tree [ -e ] [ -d ] [ -r ] [ -R ]\n");
+       fprintf(stderr, "usage: btrfs-debug-tree [-e] [-d] [-r] [-R] [-u]\n");
        fprintf(stderr, "                        [-b block_num ] device\n");
        fprintf(stderr, "\t-e : print detailed extents info\n");
        fprintf(stderr, "\t-d : print info of btrfs device and root tree dirs"
                     " only\n");
        fprintf(stderr, "\t-r : print info of roots only\n");
        fprintf(stderr, "\t-R : print info of roots and root backups\n");
+       fprintf(stderr, "\t-u : print info of uuid tree only\n");
        fprintf(stderr, "\t-b block_num : print info of the specified block"
                     " only\n");
        fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
@@ -129,6 +130,7 @@ int main(int ac, char **av)
        int slot;
        int extent_only = 0;
        int device_only = 0;
+       int uuid_tree_only = 0;
        int roots_only = 0;
        int root_backups = 0;
        u64 block_only = 0;
@@ -138,7 +140,7 @@ int main(int ac, char **av)
 
        while(1) {
                int c;
-               c = getopt(ac, av, "deb:rR");
+               c = getopt(ac, av, "deb:rRu");
                if (c < 0)
                        break;
                switch(c) {
@@ -151,6 +153,9 @@ int main(int ac, char **av)
                        case 'r':
                                roots_only = 1;
                                break;
+                       case 'u':
+                               uuid_tree_only = 1;
+                               break;
                        case 'R':
                                roots_only = 1;
                                root_backups = 1;
@@ -201,7 +206,7 @@ int main(int ac, char **av)
                goto close_root;
        }
 
-       if (!extent_only) {
+       if (!(extent_only || uuid_tree_only)) {
                if (roots_only) {
                        printf("root tree: %llu level %d\n",
                             (unsigned long long)info->tree_root->node->start,
@@ -250,7 +255,7 @@ again:
                if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
                        unsigned long offset;
                        struct extent_buffer *buf;
-                       int skip = extent_only | device_only;
+                       int skip = extent_only | device_only | uuid_tree_only;
 
                        offset = btrfs_item_ptr_offset(leaf, slot);
                        read_extent_buffer(leaf, &ri, offset, sizeof(ri));
@@ -268,9 +273,9 @@ again:
                                        printf("root");
                                break;
                        case BTRFS_EXTENT_TREE_OBJECTID:
-                               if (!device_only)
+                               if (!device_only && !uuid_tree_only)
                                        skip = 0;
-                               if (!extent_only && !device_only)
+                               if (!skip)
                                        printf("extent");
                                break;
                        case BTRFS_CHUNK_TREE_OBJECTID:
@@ -279,8 +284,10 @@ again:
                                }
                                break;
                        case BTRFS_DEV_TREE_OBJECTID:
-                               skip = 0;
-                               printf("device");
+                               if (!uuid_tree_only)
+                                       skip = 0;
+                               if (!skip)
+                                       printf("device");
                                break;
                        case BTRFS_FS_TREE_OBJECTID:
                                if (!skip) {
@@ -331,6 +338,12 @@ again:
                                        printf("quota");
                                }
                                break;
+                       case BTRFS_UUID_TREE_OBJECTID:
+                               if (!extent_only && !device_only)
+                                       skip = 0;
+                               if (!skip)
+                                       printf("uuid");
+                               break;
                        case BTRFS_MULTIPLE_OBJECTIDS:
                                if (!skip) {
                                        printf("multiple");
@@ -369,7 +382,7 @@ no_node:
                goto again;
        }
 
-       if (extent_only || device_only)
+       if (extent_only || device_only || uuid_tree_only)
                goto close_root;
 
        if (root_backups)