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author | David S. Miller <davem@davemloft.net> | 2019-02-16 22:56:34 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2019-02-16 22:56:34 -0800 |
commit | 885e63195980ab25abc67336f0c44d4cb4e6e72b (patch) | |
tree | e16c90fe7e0400646dc73771790b5be47d143012 /tools/testing/selftests/bpf/progs/netcnt_prog.c | |
parent | f186a82b10dc229f9cd1e9f27f90cb0ce86e879d (diff) | |
parent | 5aab392c55c96f9bb26d9294f965f156a87ee81c (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Alexei Starovoitov says:
====================
pull-request: bpf-next 2019-02-16
The following pull-request contains BPF updates for your *net-next* tree.
The main changes are:
1) numerous libbpf API improvements, from Andrii, Andrey, Yonghong.
2) test all bpf progs in alu32 mode, from Jiong.
3) skb->sk access and bpf_sk_fullsock(), bpf_tcp_sock() helpers, from Martin.
4) support for IP encap in lwt bpf progs, from Peter.
5) remove XDP_QUERY_XSK_UMEM dead code, from Jan.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/netcnt_prog.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/netcnt_prog.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/netcnt_prog.c b/tools/testing/selftests/bpf/progs/netcnt_prog.c new file mode 100644 index 000000000000..9f741e69cebe --- /dev/null +++ b/tools/testing/selftests/bpf/progs/netcnt_prog.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/bpf.h> +#include <linux/version.h> + +#include "bpf_helpers.h" +#include "netcnt_common.h" + +#define MAX_BPS (3 * 1024 * 1024) + +#define REFRESH_TIME_NS 100000000 +#define NS_PER_SEC 1000000000 + +struct bpf_map_def SEC("maps") percpu_netcnt = { + .type = BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE, + .key_size = sizeof(struct bpf_cgroup_storage_key), + .value_size = sizeof(struct percpu_net_cnt), +}; + +BPF_ANNOTATE_KV_PAIR(percpu_netcnt, struct bpf_cgroup_storage_key, + struct percpu_net_cnt); + +struct bpf_map_def SEC("maps") netcnt = { + .type = BPF_MAP_TYPE_CGROUP_STORAGE, + .key_size = sizeof(struct bpf_cgroup_storage_key), + .value_size = sizeof(struct net_cnt), +}; + +BPF_ANNOTATE_KV_PAIR(netcnt, struct bpf_cgroup_storage_key, + struct net_cnt); + +SEC("cgroup/skb") +int bpf_nextcnt(struct __sk_buff *skb) +{ + struct percpu_net_cnt *percpu_cnt; + char fmt[] = "%d %llu %llu\n"; + struct net_cnt *cnt; + __u64 ts, dt; + int ret; + + cnt = bpf_get_local_storage(&netcnt, 0); + percpu_cnt = bpf_get_local_storage(&percpu_netcnt, 0); + + percpu_cnt->packets++; + percpu_cnt->bytes += skb->len; + + if (percpu_cnt->packets > MAX_PERCPU_PACKETS) { + __sync_fetch_and_add(&cnt->packets, + percpu_cnt->packets); + percpu_cnt->packets = 0; + + __sync_fetch_and_add(&cnt->bytes, + percpu_cnt->bytes); + percpu_cnt->bytes = 0; + } + + ts = bpf_ktime_get_ns(); + dt = ts - percpu_cnt->prev_ts; + + dt *= MAX_BPS; + dt /= NS_PER_SEC; + + if (cnt->bytes + percpu_cnt->bytes - percpu_cnt->prev_bytes < dt) + ret = 1; + else + ret = 0; + + if (dt > REFRESH_TIME_NS) { + percpu_cnt->prev_ts = ts; + percpu_cnt->prev_packets = cnt->packets; + percpu_cnt->prev_bytes = cnt->bytes; + } + + return !!ret; +} + +char _license[] SEC("license") = "GPL"; +__u32 _version SEC("version") = LINUX_VERSION_CODE; |