bpf: Add struct for bin_args arg in bpf_bprintf_prepare

Adding struct bpf_bprintf_data to hold bin_args argument for
bpf_bprintf_prepare function.

We will add another return argument to bpf_bprintf_prepare and
pass the struct to bpf_bprintf_cleanup for proper cleanup in
following changes.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20221215214430.1336195-2-jolsa@kernel.org

1 files changed, 6 insertions, 1 deletions

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 3de24cfb7a3d..cc390ba32e70 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -2796,8 +2796,13 @@ bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
 
 #define MAX_BPRINTF_VARARGS		12
 
+struct bpf_bprintf_data {
+	u32 *bin_args;
+	bool get_bin_args;
+};
+
 int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
-			u32 **bin_buf, u32 num_args);
+			u32 num_args, struct bpf_bprintf_data *data);
 void bpf_bprintf_cleanup(void);
 
 /* the implementation of the opaque uapi struct bpf_dynptr */