Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
37 lines
763 B
C
37 lines
763 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (C) 2022. Huawei Technologies Co., Ltd */
|
|
#include <linux/bpf.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
#include <bpf/bpf_tracing.h>
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
|
|
/* Map value type: has BTF-managed field (bpf_timer) */
|
|
struct val {
|
|
struct bpf_timer t;
|
|
__u64 payload;
|
|
};
|
|
|
|
struct {
|
|
__uint(type, BPF_MAP_TYPE_HASH);
|
|
__uint(max_entries, 1);
|
|
__type(key, __u32);
|
|
__type(value, struct val);
|
|
} htab SEC(".maps");
|
|
|
|
int pid = 0;
|
|
int update_err = 0;
|
|
|
|
SEC("?fentry/bpf_obj_free_fields")
|
|
int bpf_obj_free_fields(void *ctx)
|
|
{
|
|
__u32 key = 0;
|
|
struct val value = { .payload = 1 };
|
|
|
|
if ((bpf_get_current_pid_tgid() >> 32) != pid)
|
|
return 0;
|
|
|
|
update_err = bpf_map_update_elem(&htab, &key, &value, BPF_ANY);
|
|
return 0;
|
|
}
|