fs/btrfs/super.c

782 		key.objectid = subvol_objectid;
822 			key.objectid = dirid;
871 static int get_default_subvol_objectid(struct btrfs_fs_info *fs_info, u64 *objectid)
902 		*objectid = BTRFS_FS_TREE_OBJECTID;
908 	*objectid = location.objectid;
1101 		  BTRFS_I(d_inode(dentry))->root->root_key.objectid);
1103 			BTRFS_I(d_inode(dentry))->root->root_key.objectid);
1155 		u64 root_objectid = BTRFS_I(root_inode)->root->root_key.objectid;
1778 		BTRFS_I(d_inode(dentry))->root->root_key.objectid >> 32;
1780 		BTRFS_I(d_inode(dentry))->root->root_key.objectid;
2115 	 * our original fc so we can have the subvolume name or objectid.