![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 107 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.615055994@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* Copyright (c) 2017 Facebook
|
|
*/
|
|
#include <uapi/linux/bpf.h>
|
|
#include "bpf_helpers.h"
|
|
|
|
struct syscalls_enter_open_args {
|
|
unsigned long long unused;
|
|
long syscall_nr;
|
|
long filename_ptr;
|
|
long flags;
|
|
long mode;
|
|
};
|
|
|
|
struct syscalls_exit_open_args {
|
|
unsigned long long unused;
|
|
long syscall_nr;
|
|
long ret;
|
|
};
|
|
|
|
struct bpf_map_def SEC("maps") enter_open_map = {
|
|
.type = BPF_MAP_TYPE_ARRAY,
|
|
.key_size = sizeof(u32),
|
|
.value_size = sizeof(u32),
|
|
.max_entries = 1,
|
|
};
|
|
|
|
struct bpf_map_def SEC("maps") exit_open_map = {
|
|
.type = BPF_MAP_TYPE_ARRAY,
|
|
.key_size = sizeof(u32),
|
|
.value_size = sizeof(u32),
|
|
.max_entries = 1,
|
|
};
|
|
|
|
static __always_inline void count(void *map)
|
|
{
|
|
u32 key = 0;
|
|
u32 *value, init_val = 1;
|
|
|
|
value = bpf_map_lookup_elem(map, &key);
|
|
if (value)
|
|
*value += 1;
|
|
else
|
|
bpf_map_update_elem(map, &key, &init_val, BPF_NOEXIST);
|
|
}
|
|
|
|
SEC("tracepoint/syscalls/sys_enter_open")
|
|
int trace_enter_open(struct syscalls_enter_open_args *ctx)
|
|
{
|
|
count((void *)&enter_open_map);
|
|
return 0;
|
|
}
|
|
|
|
SEC("tracepoint/syscalls/sys_exit_open")
|
|
int trace_enter_exit(struct syscalls_exit_open_args *ctx)
|
|
{
|
|
count((void *)&exit_open_map);
|
|
return 0;
|
|
}
|