mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 23:14:31 +08:00
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
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/* Copyright (c) 2015 PLUMgrid, http://plumgrid.com
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of version 2 of the GNU General Public
|
|
* License as published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/ptrace.h>
|
|
#include <linux/version.h>
|
|
#include <uapi/linux/bpf.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
#include <bpf/bpf_tracing.h>
|
|
|
|
struct pair {
|
|
u64 val;
|
|
u64 ip;
|
|
};
|
|
|
|
struct bpf_map_def SEC("maps") my_map = {
|
|
.type = BPF_MAP_TYPE_HASH,
|
|
.key_size = sizeof(long),
|
|
.value_size = sizeof(struct pair),
|
|
.max_entries = 1000000,
|
|
};
|
|
|
|
/* kprobe is NOT a stable ABI. If kernel internals change this bpf+kprobe
|
|
* example will no longer be meaningful
|
|
*/
|
|
SEC("kprobe/kmem_cache_free")
|
|
int bpf_prog1(struct pt_regs *ctx)
|
|
{
|
|
long ptr = PT_REGS_PARM2(ctx);
|
|
|
|
bpf_map_delete_elem(&my_map, &ptr);
|
|
return 0;
|
|
}
|
|
|
|
SEC("kretprobe/kmem_cache_alloc_node")
|
|
int bpf_prog2(struct pt_regs *ctx)
|
|
{
|
|
long ptr = PT_REGS_RC(ctx);
|
|
long ip = 0;
|
|
|
|
/* get ip address of kmem_cache_alloc_node() caller */
|
|
BPF_KRETPROBE_READ_RET_IP(ip, ctx);
|
|
|
|
struct pair v = {
|
|
.val = bpf_ktime_get_ns(),
|
|
.ip = ip,
|
|
};
|
|
|
|
bpf_map_update_elem(&my_map, &ptr, &v, BPF_ANY);
|
|
return 0;
|
|
}
|
|
char _license[] SEC("license") = "GPL";
|
|
u32 _version SEC("version") = LINUX_VERSION_CODE;
|