// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2011-2015 PLUMgrid, http://plumgrid.com
* Copyright (c) 2016 Facebook
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/bpf.h>
#include <linux/bpf_perf_event.h>
#include <linux/filter.h>
#include <linux/uaccess.h>
#include <linux/ctype.h>
#include <linux/kprobes.h>
#include <linux/syscalls.h>
#include <linux/error-injection.h>
#include <asm/tlb.h>
#include "trace_probe.h"
#include "trace.h"
#ifdef CONFIG_MODULES
struct bpf_trace_module {
struct module *module;
struct list_head list;
};
static LIST_HEAD(bpf_trace_modules);
static DEFINE_MUTEX(bpf_module_mutex);
static struct bpf_raw_event_map *bpf_get_raw_tracepoint_module(const char *name)
{
struct bpf_raw_event_map *btp, *ret = NULL;
struct bpf_trace_module *btm;
unsigned int i;
mutex_lock(&bpf_module_mutex);
list_for_each_entry(btm, &bpf_trace_modules, list) {
for (i = 0; i < btm->module->num_bpf_raw_events; ++i) {
btp = &btm->module->bpf_raw_events[i];
if (!strcmp(btp->tp->name, name)) {
if (try_module_get(btm->module))
ret = btp;
goto out;
}
}
}
out:
mutex_unlock(&bpf_module_mutex);
return ret;
}
#else
static struct bpf_raw_event_map