- if ty == "0x8006" or ty == "0x8306":
- first_action += "uint64_t amt = data_end - pktdata;\n"
- else:
- first_action += "uint64_t amt = 1;\n"
- first_action += "if (rate) {\n"
- first_action += f"\t{spin_lock}\n"
- first_action += "\tint64_t bucket_pkts = (rate->sent_time & (~RATE_TIME_MASK)) >> (64 - RATE_BUCKET_BITS);\n"
- # We mask the top 12 bits, so date overflows every 52 days, handled below
- first_action += "\tint64_t time_diff = time_masked - ((int64_t)(rate->sent_time & RATE_TIME_MASK));\n"
- first_action += "\tif (unlikely(time_diff < -1000000000 || time_diff > 16000000000)) {\n"
- first_action += "\t\tbucket_pkts = 0;\n"
- first_action += "\t} else {\n"
- first_action += "\t\tif (unlikely(time_diff < 0)) { time_diff = 0; }\n"
- first_action += f"\t\tint64_t pkts_since_last = (time_diff << RATE_BUCKET_BITS) * amt / per_pkt_ns;\n"
- first_action += "\t\tbucket_pkts -= pkts_since_last;\n"
- first_action += "\t}\n"
- first_action += "\tif (bucket_pkts >= (((1 << RATE_BUCKET_INTEGER_BITS) - 1) << RATE_BUCKET_DECIMAL_BITS)) {\n"
- first_action += f"\t\t{spin_unlock}\n"
- first_action += "\t\t{stats_replace}\n"
- first_action += "\t\treturn XDP_DROP;\n"
- first_action += "\t} else {\n"
- first_action += "\t\tif (unlikely(bucket_pkts < 0)) bucket_pkts = 0;\n"
- first_action += f"\t\trate->sent_time = time_masked | ((bucket_pkts + (1 << RATE_BUCKET_DECIMAL_BITS)) << (64 - RATE_BUCKET_BITS));\n"
- first_action += f"\t\t{spin_unlock}\n"
- first_action += "\t}\n"