large_buf: use enum large_buf_action for action field

Author: NameHaibinZhang

bpf/generictracer/large_buf_tailcall.h

@@ -5,6 +5,7 @@
 
 #include <bpfcore/vmlinux.h>
 
+#include <common/common.h>
 #include <common/connection_info.h>
 #include <common/scratch_mem.h>
 
@@ -17,7 +18,7 @@ typedef struct large_buf_emit_state {
     u8 batch_iter;
     u8 packet_type;
     u8 direction;
-    u8 action;
+    enum large_buf_action action;
 } large_buf_emit_state_t;
 
 SCRATCH_MEM_TYPED(large_buf_emit_state, large_buf_emit_state_t)

bpf/generictracer/protocol_http.h

@@ -376,7 +376,7 @@ static __always_inline int http_send_large_buffer(void *ctx,
     state->batch_iter = 0;
     state->packet_type = packet_type;
     state->direction = direction;
-    state->action = (u8)action;
+    state->action = action;
 
     bpf_tail_call_static(ctx, &jump_table, k_tail_large_buf_emit_continue);
     return 0;
@@ -835,8 +835,7 @@ int obi_large_buf_emit_continue(struct pt_regs *ctx) {
     large_buf->packet_type = state->packet_type;
     large_buf->direction = state->direction;
     large_buf->conn_info = info->conn_info;
-    large_buf->action =
-        state->batch_iter == 0 ? (enum large_buf_action)state->action : k_large_buf_action_append;
+    large_buf->action = state->batch_iter == 0 ? state->action : k_large_buf_action_append;
     large_buf->kind = k_large_buf_layer_app;
     large_buf->tp = info->tp;