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-rw-r--r--tools/testing/selftests/bpf/progs/tailcall1.c48
-rw-r--r--tools/testing/selftests/bpf/progs/tailcall2.c59
-rw-r--r--tools/testing/selftests/bpf/progs/tailcall3.c31
-rw-r--r--tools/testing/selftests/bpf/progs/tailcall4.c33
-rw-r--r--tools/testing/selftests/bpf/progs/tailcall5.c40
5 files changed, 211 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/tailcall1.c b/tools/testing/selftests/bpf/progs/tailcall1.c
new file mode 100644
index 000000000000..63531e1a9fa4
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/tailcall1.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+
+#include "bpf_helpers.h"
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
+ __uint(max_entries, 3);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(__u32));
+} jmp_table SEC(".maps");
+
+#define TAIL_FUNC(x) \
+ SEC("classifier/" #x) \
+ int bpf_func_##x(struct __sk_buff *skb) \
+ { \
+ return x; \
+ }
+TAIL_FUNC(0)
+TAIL_FUNC(1)
+TAIL_FUNC(2)
+
+SEC("classifier")
+int entry(struct __sk_buff *skb)
+{
+ /* Multiple locations to make sure we patch
+ * all of them.
+ */
+ bpf_tail_call(skb, &jmp_table, 0);
+ bpf_tail_call(skb, &jmp_table, 0);
+ bpf_tail_call(skb, &jmp_table, 0);
+ bpf_tail_call(skb, &jmp_table, 0);
+
+ bpf_tail_call(skb, &jmp_table, 1);
+ bpf_tail_call(skb, &jmp_table, 1);
+ bpf_tail_call(skb, &jmp_table, 1);
+ bpf_tail_call(skb, &jmp_table, 1);
+
+ bpf_tail_call(skb, &jmp_table, 2);
+ bpf_tail_call(skb, &jmp_table, 2);
+ bpf_tail_call(skb, &jmp_table, 2);
+ bpf_tail_call(skb, &jmp_table, 2);
+
+ return 3;
+}
+
+char __license[] SEC("license") = "GPL";
+int _version SEC("version") = 1;
diff --git a/tools/testing/selftests/bpf/progs/tailcall2.c b/tools/testing/selftests/bpf/progs/tailcall2.c
new file mode 100644
index 000000000000..21c85c477210
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/tailcall2.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+
+#include "bpf_helpers.h"
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
+ __uint(max_entries, 5);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(__u32));
+} jmp_table SEC(".maps");
+
+SEC("classifier/0")
+int bpf_func_0(struct __sk_buff *skb)
+{
+ bpf_tail_call(skb, &jmp_table, 1);
+ return 0;
+}
+
+SEC("classifier/1")
+int bpf_func_1(struct __sk_buff *skb)
+{
+ bpf_tail_call(skb, &jmp_table, 2);
+ return 1;
+}
+
+SEC("classifier/2")
+int bpf_func_2(struct __sk_buff *skb)
+{
+ return 2;
+}
+
+SEC("classifier/3")
+int bpf_func_3(struct __sk_buff *skb)
+{
+ bpf_tail_call(skb, &jmp_table, 4);
+ return 3;
+}
+
+SEC("classifier/4")
+int bpf_func_4(struct __sk_buff *skb)
+{
+ bpf_tail_call(skb, &jmp_table, 3);
+ return 4;
+}
+
+SEC("classifier")
+int entry(struct __sk_buff *skb)
+{
+ bpf_tail_call(skb, &jmp_table, 0);
+ /* Check multi-prog update. */
+ bpf_tail_call(skb, &jmp_table, 2);
+ /* Check tail call limit. */
+ bpf_tail_call(skb, &jmp_table, 3);
+ return 3;
+}
+
+char __license[] SEC("license") = "GPL";
+int _version SEC("version") = 1;
diff --git a/tools/testing/selftests/bpf/progs/tailcall3.c b/tools/testing/selftests/bpf/progs/tailcall3.c
new file mode 100644
index 000000000000..1ecae198b8c1
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/tailcall3.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+
+#include "bpf_helpers.h"
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
+ __uint(max_entries, 1);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(__u32));
+} jmp_table SEC(".maps");
+
+static volatile int count;
+
+SEC("classifier/0")
+int bpf_func_0(struct __sk_buff *skb)
+{
+ count++;
+ bpf_tail_call(skb, &jmp_table, 0);
+ return 1;
+}
+
+SEC("classifier")
+int entry(struct __sk_buff *skb)
+{
+ bpf_tail_call(skb, &jmp_table, 0);
+ return 0;
+}
+
+char __license[] SEC("license") = "GPL";
+int _version SEC("version") = 1;
diff --git a/tools/testing/selftests/bpf/progs/tailcall4.c b/tools/testing/selftests/bpf/progs/tailcall4.c
new file mode 100644
index 000000000000..499388758119
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/tailcall4.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+
+#include "bpf_helpers.h"
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
+ __uint(max_entries, 3);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(__u32));
+} jmp_table SEC(".maps");
+
+static volatile int selector;
+
+#define TAIL_FUNC(x) \
+ SEC("classifier/" #x) \
+ int bpf_func_##x(struct __sk_buff *skb) \
+ { \
+ return x; \
+ }
+TAIL_FUNC(0)
+TAIL_FUNC(1)
+TAIL_FUNC(2)
+
+SEC("classifier")
+int entry(struct __sk_buff *skb)
+{
+ bpf_tail_call(skb, &jmp_table, selector);
+ return 3;
+}
+
+char __license[] SEC("license") = "GPL";
+int _version SEC("version") = 1;
diff --git a/tools/testing/selftests/bpf/progs/tailcall5.c b/tools/testing/selftests/bpf/progs/tailcall5.c
new file mode 100644
index 000000000000..49c64eb53f19
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/tailcall5.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+
+#include "bpf_helpers.h"
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
+ __uint(max_entries, 3);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(__u32));
+} jmp_table SEC(".maps");
+
+static volatile int selector;
+
+#define TAIL_FUNC(x) \
+ SEC("classifier/" #x) \
+ int bpf_func_##x(struct __sk_buff *skb) \
+ { \
+ return x; \
+ }
+TAIL_FUNC(0)
+TAIL_FUNC(1)
+TAIL_FUNC(2)
+
+SEC("classifier")
+int entry(struct __sk_buff *skb)
+{
+ int idx = 0;
+
+ if (selector == 1234)
+ idx = 1;
+ else if (selector == 5678)
+ idx = 2;
+
+ bpf_tail_call(skb, &jmp_table, idx);
+ return 3;
+}
+
+char __license[] SEC("license") = "GPL";
+int _version SEC("version") = 1;
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