btrfs: account block group tree when calculating global reserve size

commit 8dbfc14fc736eb701089aff09645c3d4ad3decb1 upstream.

When using the block group tree feature, this tree is a critical tree just
like the extent, csum and free space trees, and just like them it uses the
delayed refs block reserve.

So take into account the block group tree, and its current size, when
calculating the size for the global reserve.

CC: stable@vger.kernel.org # 6.1+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/btrfs/block-rsv.c b/fs/btrfs/block-rsv.c
index 2044f1e18629711e02678c4ca58a0666d62e36b0..507b44d18572db551fafd968d6e5a3ee7473cbcb 100644 (file)
--- a/fs/btrfs/block-rsv.c
+++ b/fs/btrfs/block-rsv.c
@@ -377,6 +377,11 @@ void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info)
        }
        read_unlock(&fs_info->global_root_lock);
 
+       if (btrfs_fs_compat_ro(fs_info, BLOCK_GROUP_TREE)) {
+               num_bytes += btrfs_root_used(&fs_info->block_group_root->root_item);
+               min_items++;
+       }
+
        /*
         * But we also want to reserve enough space so we can do the fallback
         * global reserve for an unlink, which is an additional 5 items (see the