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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>
#include "../bpf_testmod/bpf_testmod_kfunc.h"
SEC("tc")
int kfunc_call_test4(struct __sk_buff *skb)
{
struct bpf_sock *sk = skb->sk;
long tmp;
if (!sk)
return -1;
sk = bpf_sk_fullsock(sk);
if (!sk)
return -1;
tmp = bpf_kfunc_call_test4(-3, -30, -200, -1000);
return (tmp >> 32) + tmp;
}
SEC("tc")
int kfunc_call_test2(struct __sk_buff *skb)
{
struct bpf_sock *sk = skb->sk;
if (!sk)
return -1;
sk = bpf_sk_fullsock(sk);
if (!sk)
return -1;
return bpf_kfunc_call_test2((struct sock *)sk, 1, 2);
}
SEC("tc")
int kfunc_call_test1(struct __sk_buff *skb)
{
struct bpf_sock *sk = skb->sk;
__u64 a = 1ULL << 32;
__u32 ret;
if (!sk)
return -1;
sk = bpf_sk_fullsock(sk);
if (!sk)
return -1;
a = bpf_kfunc_call_test1((struct sock *)sk, 1, a | 2, 3, a | 4);
ret = a >> 32; /* ret should be 2 */
ret += (__u32)a; /* ret should be 12 */
return ret;
}
SEC("tc")
int kfunc_call_test_ref_btf_id(struct __sk_buff *skb)
{
struct prog_test_ref_kfunc *pt;
unsigned long s = 0;
int ret = 0;
pt = bpf_kfunc_call_test_acquire(&s);
if (pt) {
if (pt->a != 42 || pt->b != 108)
ret = -1;
bpf_kfunc_call_test_release(pt);
}
return ret;
}
SEC("tc")
int kfunc_call_test_pass(struct __sk_buff *skb)
{
struct prog_test_pass1 p1 = {};
struct prog_test_pass2 p2 = {};
short a = 0;
__u64 b = 0;
long c = 0;
char d = 0;
int e = 0;
bpf_kfunc_call_test_pass_ctx(skb);
bpf_kfunc_call_test_pass1(&p1);
bpf_kfunc_call_test_pass2(&p2);
bpf_kfunc_call_test_mem_len_pass1(&a, sizeof(a));
bpf_kfunc_call_test_mem_len_pass1(&b, sizeof(b));
bpf_kfunc_call_test_mem_len_pass1(&c, sizeof(c));
bpf_kfunc_call_test_mem_len_pass1(&d, sizeof(d));
bpf_kfunc_call_test_mem_len_pass1(&e, sizeof(e));
bpf_kfunc_call_test_mem_len_fail2(&b, -1);
return 0;
}
struct syscall_test_args {
__u8 data[16];
size_t size;
};
SEC("syscall")
int kfunc_syscall_test(struct syscall_test_args *args)
{
const long size = args->size;
if (size > sizeof(args->data))
return -7; /* -E2BIG */
bpf_kfunc_call_test_mem_len_pass1(&args->data, sizeof(args->data));
bpf_kfunc_call_test_mem_len_pass1(&args->data, sizeof(*args));
bpf_kfunc_call_test_mem_len_pass1(&args->data, size);
return 0;
}
SEC("syscall")
int kfunc_syscall_test_null(struct syscall_test_args *args)
{
/* Must be called with args as a NULL pointer
* we do not check for it to have the verifier consider that
* the pointer might not be null, and so we can load it.
*
* So the following can not be added:
*
* if (args)
* return -22;
*/
bpf_kfunc_call_test_mem_len_pass1(args, 0);
return 0;
}
SEC("tc")
int kfunc_call_test_get_mem(struct __sk_buff *skb)
{
struct prog_test_ref_kfunc *pt;
unsigned long s = 0;
int *p = NULL;
int ret = 0;
pt = bpf_kfunc_call_test_acquire(&s);
if (pt) {
p = bpf_kfunc_call_test_get_rdwr_mem(pt, 2 * sizeof(int));
if (p) {
p[0] = 42;
ret = p[1]; /* 108 */
} else {
ret = -1;
}
if (ret >= 0) {
p = bpf_kfunc_call_test_get_rdonly_mem(pt, 2 * sizeof(int));
if (p)
ret = p[0]; /* 42 */
else
ret = -1;
}
bpf_kfunc_call_test_release(pt);
}
return ret;
}
SEC("tc")
int kfunc_call_test_static_unused_arg(struct __sk_buff *skb)
{
u32 expected = 5, actual;
actual = bpf_kfunc_call_test_static_unused_arg(expected, 0xdeadbeef);
return actual != expected ? -1 : 0;
}
struct ctx_val {
struct bpf_testmod_ctx __kptr *ctx;
};
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
__type(key, int);
__type(value, struct ctx_val);
} ctx_map SEC(".maps");
SEC("tc")
int kfunc_call_ctx(struct __sk_buff *skb)
{
struct bpf_testmod_ctx *ctx;
int err = 0;
ctx = bpf_testmod_ctx_create(&err);
if (!ctx && !err)
err = -1;
if (ctx) {
int key = 0;
struct ctx_val *ctx_val = bpf_map_lookup_elem(&ctx_map, &key);
/* Transfer ctx to map to be freed via implicit dtor call
* on cleanup.
*/
if (ctx_val)
ctx = bpf_kptr_xchg(&ctx_val->ctx, ctx);
if (ctx) {
bpf_testmod_ctx_release(ctx);
err = -1;
}
}
return err;
}
char _license[] SEC("license") = "GPL";
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