filter: refactoring filter

Attempt to simplify the filter build:
  - storing all the bpf_args in a common array and saving the index of
    each entry in filter_input
  - added new flag to filter_add_arg for append an argument to an entry
  - split large loop in filter_build in multiple functions
  - adjust and refactor tests/units/test_filter

The tests in test_filter_build.c still need to be fixed

1 files changed, 2 insertions, 1 deletions

diff --git a/tests/unit/testutil.h b/tests/unit/testutil.h
index 638dd0a..4f104ac 100644
--- a/tests/unit/testutil.h
+++ b/tests/unit/testutil.h
@@ -55,7 +55,8 @@ struct args_target {
         bool open_path;
         int fd;
         int nr;
-	struct arg args[6];
+	bool filter_args[6];
+	struct bpf_arg args[6];
 	void *targs[6];
 	int (*install_filter)(struct args_target *at);
 	int (*target)(void *);