mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 22:53:55 +08:00
958a3f2d2a
Currenty lsm uses bpf_tracing_func_proto helpers which do not include stack trace or perf event output. It's useful to have those for bpftrace lsm support [1]. Using tracing_prog_func_proto helpers for lsm programs. [1] https://github.com/iovisor/bpftrace/pull/1347 Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Cc: KP Singh <kpsingh@google.com> Link: https://lore.kernel.org/bpf/20200531154255.896551-1-jolsa@kernel.org
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
/*
|
|
* Copyright (C) 2020 Google LLC.
|
|
*/
|
|
|
|
#include <linux/filter.h>
|
|
#include <linux/bpf.h>
|
|
#include <linux/btf.h>
|
|
#include <linux/lsm_hooks.h>
|
|
#include <linux/bpf_lsm.h>
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/bpf_verifier.h>
|
|
|
|
/* For every LSM hook that allows attachment of BPF programs, declare a nop
|
|
* function where a BPF program can be attached.
|
|
*/
|
|
#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
|
|
noinline RET bpf_lsm_##NAME(__VA_ARGS__) \
|
|
{ \
|
|
return DEFAULT; \
|
|
}
|
|
|
|
#include <linux/lsm_hook_defs.h>
|
|
#undef LSM_HOOK
|
|
|
|
#define BPF_LSM_SYM_PREFX "bpf_lsm_"
|
|
|
|
int bpf_lsm_verify_prog(struct bpf_verifier_log *vlog,
|
|
const struct bpf_prog *prog)
|
|
{
|
|
if (!prog->gpl_compatible) {
|
|
bpf_log(vlog,
|
|
"LSM programs must have a GPL compatible license\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (strncmp(BPF_LSM_SYM_PREFX, prog->aux->attach_func_name,
|
|
sizeof(BPF_LSM_SYM_PREFX) - 1)) {
|
|
bpf_log(vlog, "attach_btf_id %u points to wrong type name %s\n",
|
|
prog->aux->attach_btf_id, prog->aux->attach_func_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct bpf_prog_ops lsm_prog_ops = {
|
|
};
|
|
|
|
const struct bpf_verifier_ops lsm_verifier_ops = {
|
|
.get_func_proto = tracing_prog_func_proto,
|
|
.is_valid_access = btf_ctx_access,
|
|
};
|