github.com/datadog/cilium@v1.6.12/bpf/lib/metrics.h (about) 1 /* 2 * Copyright (C) 2018 Authors of Cilium 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 /* 19 * Data metrics collection functions 20 * 21 */ 22 23 #ifndef __LIB_METRICS__ 24 #define __LIB_METRICS__ 25 26 27 #include "common.h" 28 #include "utils.h" 29 #include "maps.h" 30 #include "dbg.h" 31 #include <stdint.h> 32 #include <stdbool.h> 33 34 35 /** 36 * update_metrics 37 * @direction: 1: Ingress 2: Egress 38 * @reason: reason for forwarding or dropping packet. 39 reason is 0 if packet is being forwarded, else reason 40 is the drop error code. 41 * Update the metrics map. 42 */ 43 static inline void update_metrics(__u32 bytes, __u8 direction, __u8 reason) 44 { 45 struct metrics_value *entry, newEntry = {}; 46 struct metrics_key key = {}; 47 48 key.reason = reason; 49 key.dir = direction; 50 51 52 if ((entry = map_lookup_elem(&METRICS_MAP, &key))) { 53 entry->count += 1; 54 entry->bytes += (__u64)bytes; 55 } else { 56 newEntry.count = 1; 57 newEntry.bytes = (__u64)bytes; 58 map_update_elem(&METRICS_MAP, &key, &newEntry, 0); 59 } 60 } 61 62 #endif /* __LIB_METRICS__ */