1 // SPDX-License-Identifier: GPL-2.0 2 #ifndef __NETCNT_COMMON_H 3 #define __NETCNT_COMMON_H 4 5 #include <linux/types.h> 6 7 #define MAX_PERCPU_PACKETS 32 8 9 /* sizeof(struct bpf_local_storage_elem): 10 * 11 * It is about 128 bytes on x86_64 and 512 bytes on s390x, but allocate more to 12 * account for possible layout changes, different architectures, etc. 13 * The kernel will wrap up to PAGE_SIZE internally anyway. 14 */ 15 #define SIZEOF_BPF_LOCAL_STORAGE_ELEM 768 16 17 /* Try to estimate kernel's BPF_LOCAL_STORAGE_MAX_VALUE_SIZE: */ 18 #define BPF_LOCAL_STORAGE_MAX_VALUE_SIZE (0xFFFF - \ 19 SIZEOF_BPF_LOCAL_STORAGE_ELEM) 20 21 #define PCPU_MIN_UNIT_SIZE 32768 22 23 union percpu_net_cnt { 24 struct { 25 __u64 packets; 26 __u64 bytes; 27 28 __u64 prev_ts; 29 30 __u64 prev_packets; 31 __u64 prev_bytes; 32 }; 33 __u8 data[PCPU_MIN_UNIT_SIZE]; 34 }; 35 36 union net_cnt { 37 struct { 38 __u64 packets; 39 __u64 bytes; 40 }; 41 __u8 data[BPF_LOCAL_STORAGE_MAX_VALUE_SIZE]; 42 }; 43 44 #endif 45