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btrfs-progs: print-tree: Do correct offset output for ROOT_ITEM 

Commit Fixes: 8c36786c81 ("btrfs-progs: print-tree: Print offset as
tree objectid for ROOT_ITEM") changes how we translate offset of
ROOT_ITEM.

However the fact is, even for ROOT_ITEM, we have different meaning of
offset.

For tree reloc tree, it's indeed subvolume id.  But for other trees,
it's the transid of when it's created.

Reported-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Qu Wenruo 2018-03-19 18:28:10 +08:00 committed by David Sterba
parent 92ffad47b5
commit 7065345c99
1 changed files with 10 additions and 1 deletions
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11
print-tree.c
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@ -834,7 +834,16 @@ void btrfs_print_key(struct btrfs_disk_key *disk_key)
*/
case BTRFS_ROOT_ITEM_KEY:
printf(" ");
print_objectid(stdout, offset, type);
/*
* Normally offset of ROOT_ITEM should present the generation
* of creation time of the root.
* However if this is reloc tree, offset is the subvolume
* id of its source. Here we do extra check on this.
*/
if (objectid == BTRFS_TREE_RELOC_OBJECTID)
print_objectid(stdout, offset, type);
else
printf("%lld", offset);
printf(")");
break;
default: