forked from Minki/linux
7cf245a37e
Fix all files in samples/bpf to include libbpf header files with the bpf/
prefix, to be consistent with external users of the library. Also ensure
that all includes of exported libbpf header files (those that are exported
on 'make install' of the library) use bracketed includes instead of quoted.
To make sure no new files are introduced that doesn't include the bpf/
prefix in its include, remove tools/lib/bpf from the include path entirely,
and use tools/lib instead.
Fixes: 6910d7d386 ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/157952560911.1683545.8795966751309534150.stgit@toke.dk
81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/* Copyright (c) 2016 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#include <linux/ptrace.h>
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#include <linux/version.h>
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#include <uapi/linux/bpf.h>
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#include <uapi/linux/bpf_perf_event.h>
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#include <uapi/linux/perf_event.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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struct key_t {
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char comm[TASK_COMM_LEN];
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u32 kernstack;
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u32 userstack;
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};
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struct bpf_map_def SEC("maps") counts = {
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.type = BPF_MAP_TYPE_HASH,
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.key_size = sizeof(struct key_t),
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.value_size = sizeof(u64),
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.max_entries = 10000,
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};
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struct bpf_map_def SEC("maps") stackmap = {
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.type = BPF_MAP_TYPE_STACK_TRACE,
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.key_size = sizeof(u32),
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.value_size = PERF_MAX_STACK_DEPTH * sizeof(u64),
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.max_entries = 10000,
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};
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#define KERN_STACKID_FLAGS (0 | BPF_F_FAST_STACK_CMP)
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#define USER_STACKID_FLAGS (0 | BPF_F_FAST_STACK_CMP | BPF_F_USER_STACK)
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SEC("perf_event")
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int bpf_prog1(struct bpf_perf_event_data *ctx)
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{
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char time_fmt1[] = "Time Enabled: %llu, Time Running: %llu";
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char time_fmt2[] = "Get Time Failed, ErrCode: %d";
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char addr_fmt[] = "Address recorded on event: %llx";
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char fmt[] = "CPU-%d period %lld ip %llx";
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u32 cpu = bpf_get_smp_processor_id();
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struct bpf_perf_event_value value_buf;
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struct key_t key;
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u64 *val, one = 1;
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int ret;
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if (ctx->sample_period < 10000)
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/* ignore warmup */
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return 0;
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bpf_get_current_comm(&key.comm, sizeof(key.comm));
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key.kernstack = bpf_get_stackid(ctx, &stackmap, KERN_STACKID_FLAGS);
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key.userstack = bpf_get_stackid(ctx, &stackmap, USER_STACKID_FLAGS);
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if ((int)key.kernstack < 0 && (int)key.userstack < 0) {
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bpf_trace_printk(fmt, sizeof(fmt), cpu, ctx->sample_period,
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PT_REGS_IP(&ctx->regs));
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return 0;
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}
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ret = bpf_perf_prog_read_value(ctx, (void *)&value_buf, sizeof(struct bpf_perf_event_value));
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if (!ret)
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bpf_trace_printk(time_fmt1, sizeof(time_fmt1), value_buf.enabled, value_buf.running);
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else
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bpf_trace_printk(time_fmt2, sizeof(time_fmt2), ret);
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if (ctx->addr != 0)
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bpf_trace_printk(addr_fmt, sizeof(addr_fmt), ctx->addr);
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val = bpf_map_lookup_elem(&counts, &key);
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if (val)
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(*val)++;
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else
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bpf_map_update_elem(&counts, &key, &one, BPF_NOEXIST);
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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