Commit e5df9573 authored Aug 29, 2011 by Mark Fasheh Committed by David Sterba Mar 22, 2012

btrfs: Go readonly on bad extent refs in update_ref_for_cow()



update_ref_for_cow() will BUG_ON() after it's call to
btrfs_lookup_extent_info() if no existing references are found.  Since refs
are computed directly from disk, this should be treated as a corruption
instead of a logic error.

Signed-off-by: Mark Fasheh <mfasheh@suse.de>

parent 4ed1d16e

fs/btrfs/ctree.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -333,7 +333,11 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
		buf->len, &refs, &flags);
		if (ret)
		return ret;
		BUG_ON(refs == 0);
		if (refs == 0) {
		ret = -EROFS;
		btrfs_std_error(root->fs_info, ret);
		return ret;
		}
		} else {
		refs = 1;
		if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID \|\|