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Diffstat (limited to 'tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c')
-rw-r--r--tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c82
1 files changed, 77 insertions, 5 deletions
diff --git a/tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c b/tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c
index 2d211ee98a1c..c329fccf9842 100644
--- a/tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c
+++ b/tools/testing/selftests/bpf/progs/fexit_bpf2bpf.c
@@ -1,7 +1,10 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */
+#include <linux/stddef.h>
+#include <linux/ipv6.h>
#include <linux/bpf.h>
-#include "bpf_helpers.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_endian.h>
#include "bpf_trace_helpers.h"
struct sk_buff {
@@ -9,8 +12,8 @@ struct sk_buff {
};
__u64 test_result = 0;
-BPF_TRACE_2("fexit/test_pkt_access", test_main,
- struct sk_buff *, skb, int, ret)
+SEC("fexit/test_pkt_access")
+int BPF_PROG(test_main, struct sk_buff *skb, int ret)
{
int len;
@@ -24,8 +27,8 @@ BPF_TRACE_2("fexit/test_pkt_access", test_main,
}
__u64 test_result_subprog1 = 0;
-BPF_TRACE_2("fexit/test_pkt_access_subprog1", test_subprog1,
- struct sk_buff *, skb, int, ret)
+SEC("fexit/test_pkt_access_subprog1")
+int BPF_PROG(test_subprog1, struct sk_buff *skb, int ret)
{
int len;
@@ -79,4 +82,73 @@ int test_subprog2(struct args_subprog2 *ctx)
test_result_subprog2 = 1;
return 0;
}
+
+__u64 test_result_subprog3 = 0;
+SEC("fexit/test_pkt_access_subprog3")
+int BPF_PROG(test_subprog3, int val, struct sk_buff *skb, int ret)
+{
+ int len;
+
+ __builtin_preserve_access_index(({
+ len = skb->len;
+ }));
+ if (len != 74 || ret != 74 * val || val != 3)
+ return 0;
+ test_result_subprog3 = 1;
+ return 0;
+}
+
+__u64 test_get_skb_len = 0;
+SEC("freplace/get_skb_len")
+int new_get_skb_len(struct __sk_buff *skb)
+{
+ int len = skb->len;
+
+ if (len != 74)
+ return 0;
+ test_get_skb_len = 1;
+ return 74; /* original get_skb_len() returns skb->len */
+}
+
+__u64 test_get_skb_ifindex = 0;
+SEC("freplace/get_skb_ifindex")
+int new_get_skb_ifindex(int val, struct __sk_buff *skb, int var)
+{
+ void *data_end = (void *)(long)skb->data_end;
+ void *data = (void *)(long)skb->data;
+ struct ipv6hdr ip6, *ip6p;
+ int ifindex = skb->ifindex;
+ __u32 eth_proto;
+ __u32 nh_off;
+
+ /* check that BPF extension can read packet via direct packet access */
+ if (data + 14 + sizeof(ip6) > data_end)
+ return 0;
+ ip6p = data + 14;
+
+ if (ip6p->nexthdr != 6 || ip6p->payload_len != __bpf_constant_htons(123))
+ return 0;
+
+ /* check that legacy packet access helper works too */
+ if (bpf_skb_load_bytes(skb, 14, &ip6, sizeof(ip6)) < 0)
+ return 0;
+ ip6p = &ip6;
+ if (ip6p->nexthdr != 6 || ip6p->payload_len != __bpf_constant_htons(123))
+ return 0;
+
+ if (ifindex != 1 || val != 3 || var != 1)
+ return 0;
+ test_get_skb_ifindex = 1;
+ return 3; /* original get_skb_ifindex() returns val * ifindex * var */
+}
+
+volatile __u64 test_get_constant = 0;
+SEC("freplace/get_constant")
+int new_get_constant(long val)
+{
+ if (val != 123)
+ return 0;
+ test_get_constant = 1;
+ return test_get_constant; /* original get_constant() returns val - 122 */
+}
char _license[] SEC("license") = "GPL";