59929cd1fe
Because the previous two commit replaced the bpf_load implementation of the user program with libbpf, the corresponding kernel program's MAP definition can be replaced with new BTF-defined map syntax. This commit only updates the samples which uses libbpf API for loading bpf program not with bpf_load. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200516040608.1377876-6-danieltimlee@gmail.com
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
#include <linux/ptrace.h>
|
|
#include <linux/version.h>
|
|
#include <uapi/linux/bpf.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
|
|
struct {
|
|
__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
|
|
__uint(key_size, sizeof(int));
|
|
__uint(value_size, sizeof(u32));
|
|
__uint(max_entries, 64);
|
|
} counters SEC(".maps");
|
|
|
|
struct {
|
|
__uint(type, BPF_MAP_TYPE_HASH);
|
|
__type(key, int);
|
|
__type(value, u64);
|
|
__uint(max_entries, 64);
|
|
} values SEC(".maps");
|
|
|
|
struct {
|
|
__uint(type, BPF_MAP_TYPE_HASH);
|
|
__type(key, int);
|
|
__type(value, struct bpf_perf_event_value);
|
|
__uint(max_entries, 64);
|
|
} values2 SEC(".maps");
|
|
|
|
SEC("kprobe/htab_map_get_next_key")
|
|
int bpf_prog1(struct pt_regs *ctx)
|
|
{
|
|
u32 key = bpf_get_smp_processor_id();
|
|
u64 count, *val;
|
|
s64 error;
|
|
|
|
count = bpf_perf_event_read(&counters, key);
|
|
error = (s64)count;
|
|
if (error <= -2 && error >= -22)
|
|
return 0;
|
|
|
|
val = bpf_map_lookup_elem(&values, &key);
|
|
if (val)
|
|
*val = count;
|
|
else
|
|
bpf_map_update_elem(&values, &key, &count, BPF_NOEXIST);
|
|
|
|
return 0;
|
|
}
|
|
|
|
SEC("kprobe/htab_map_lookup_elem")
|
|
int bpf_prog2(struct pt_regs *ctx)
|
|
{
|
|
u32 key = bpf_get_smp_processor_id();
|
|
struct bpf_perf_event_value *val, buf;
|
|
int error;
|
|
|
|
error = bpf_perf_event_read_value(&counters, key, &buf, sizeof(buf));
|
|
if (error)
|
|
return 0;
|
|
|
|
val = bpf_map_lookup_elem(&values2, &key);
|
|
if (val)
|
|
*val = buf;
|
|
else
|
|
bpf_map_update_elem(&values2, &key, &buf, BPF_NOEXIST);
|
|
|
|
return 0;
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
u32 _version SEC("version") = LINUX_VERSION_CODE;
|