mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 15:04:27 +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
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/* Copyright (c) 2016 Thomas Graf <tgraf@tgraf.ch>
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*/
|
|
|
|
#include <uapi/linux/bpf.h>
|
|
#include <uapi/linux/if_ether.h>
|
|
#include <uapi/linux/ip.h>
|
|
#include <uapi/linux/in.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
|
|
# define printk(fmt, ...) \
|
|
({ \
|
|
char ____fmt[] = fmt; \
|
|
bpf_trace_printk(____fmt, sizeof(____fmt), \
|
|
##__VA_ARGS__); \
|
|
})
|
|
|
|
struct bpf_elf_map {
|
|
__u32 type;
|
|
__u32 size_key;
|
|
__u32 size_value;
|
|
__u32 max_elem;
|
|
__u32 flags;
|
|
__u32 id;
|
|
__u32 pinning;
|
|
};
|
|
|
|
struct bpf_elf_map SEC("maps") lwt_len_hist_map = {
|
|
.type = BPF_MAP_TYPE_PERCPU_HASH,
|
|
.size_key = sizeof(__u64),
|
|
.size_value = sizeof(__u64),
|
|
.pinning = 2,
|
|
.max_elem = 1024,
|
|
};
|
|
|
|
static unsigned int log2(unsigned int v)
|
|
{
|
|
unsigned int r;
|
|
unsigned int shift;
|
|
|
|
r = (v > 0xFFFF) << 4; v >>= r;
|
|
shift = (v > 0xFF) << 3; v >>= shift; r |= shift;
|
|
shift = (v > 0xF) << 2; v >>= shift; r |= shift;
|
|
shift = (v > 0x3) << 1; v >>= shift; r |= shift;
|
|
r |= (v >> 1);
|
|
return r;
|
|
}
|
|
|
|
static unsigned int log2l(unsigned long v)
|
|
{
|
|
unsigned int hi = v >> 32;
|
|
if (hi)
|
|
return log2(hi) + 32;
|
|
else
|
|
return log2(v);
|
|
}
|
|
|
|
SEC("len_hist")
|
|
int do_len_hist(struct __sk_buff *skb)
|
|
{
|
|
__u64 *value, key, init_val = 1;
|
|
|
|
key = log2l(skb->len);
|
|
|
|
value = bpf_map_lookup_elem(&lwt_len_hist_map, &key);
|
|
if (value)
|
|
__sync_fetch_and_add(value, 1);
|
|
else
|
|
bpf_map_update_elem(&lwt_len_hist_map, &key, &init_val, BPF_ANY);
|
|
|
|
return BPF_OK;
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|