]> www.infradead.org Git - users/jedix/linux-maple.git/commitdiff
selftests/bpf: Test struct_ops maps with a large number of struct_ops program.
authorKui-Feng Lee <thinker.li@gmail.com>
Sat, 24 Feb 2024 22:34:18 +0000 (14:34 -0800)
committerMartin KaFai Lau <martin.lau@kernel.org>
Mon, 4 Mar 2024 22:09:24 +0000 (14:09 -0800)
Create and load a struct_ops map with a large number of struct_ops
programs to generate trampolines taking a size over multiple pages. The
map includes 40 programs. Their trampolines takes 6.6k+, more than 1.5
pages, on x86.

Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Link: https://lore.kernel.org/r/20240224223418.526631-4-thinker.li@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h
tools/testing/selftests/bpf/prog_tests/test_struct_ops_multi_pages.c [new file with mode: 0644]
tools/testing/selftests/bpf/progs/struct_ops_multi_pages.c [new file with mode: 0644]

index 971458acfac350c0e09c7d76457a31ae9564b4b0..622d24e29d358ab2372ebea1f55eaf4c15dede9f 100644 (file)
@@ -43,6 +43,50 @@ struct bpf_testmod_ops {
                int b;
        } unsupported;
        int data;
+
+       /* The following pointers are used to test the maps having multiple
+        * pages of trampolines.
+        */
+       int (*tramp_1)(int value);
+       int (*tramp_2)(int value);
+       int (*tramp_3)(int value);
+       int (*tramp_4)(int value);
+       int (*tramp_5)(int value);
+       int (*tramp_6)(int value);
+       int (*tramp_7)(int value);
+       int (*tramp_8)(int value);
+       int (*tramp_9)(int value);
+       int (*tramp_10)(int value);
+       int (*tramp_11)(int value);
+       int (*tramp_12)(int value);
+       int (*tramp_13)(int value);
+       int (*tramp_14)(int value);
+       int (*tramp_15)(int value);
+       int (*tramp_16)(int value);
+       int (*tramp_17)(int value);
+       int (*tramp_18)(int value);
+       int (*tramp_19)(int value);
+       int (*tramp_20)(int value);
+       int (*tramp_21)(int value);
+       int (*tramp_22)(int value);
+       int (*tramp_23)(int value);
+       int (*tramp_24)(int value);
+       int (*tramp_25)(int value);
+       int (*tramp_26)(int value);
+       int (*tramp_27)(int value);
+       int (*tramp_28)(int value);
+       int (*tramp_29)(int value);
+       int (*tramp_30)(int value);
+       int (*tramp_31)(int value);
+       int (*tramp_32)(int value);
+       int (*tramp_33)(int value);
+       int (*tramp_34)(int value);
+       int (*tramp_35)(int value);
+       int (*tramp_36)(int value);
+       int (*tramp_37)(int value);
+       int (*tramp_38)(int value);
+       int (*tramp_39)(int value);
+       int (*tramp_40)(int value);
 };
 
 #endif /* _BPF_TESTMOD_H */
diff --git a/tools/testing/selftests/bpf/prog_tests/test_struct_ops_multi_pages.c b/tools/testing/selftests/bpf/prog_tests/test_struct_ops_multi_pages.c
new file mode 100644 (file)
index 0000000..645d32b
--- /dev/null
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
+#include <test_progs.h>
+
+#include "struct_ops_multi_pages.skel.h"
+
+static void do_struct_ops_multi_pages(void)
+{
+       struct struct_ops_multi_pages *skel;
+       struct bpf_link *link;
+
+       /* The size of all trampolines of skel->maps.multi_pages should be
+        * over 1 page (at least for x86).
+        */
+       skel = struct_ops_multi_pages__open_and_load();
+       if (!ASSERT_OK_PTR(skel, "struct_ops_multi_pages_open_and_load"))
+               return;
+
+       link = bpf_map__attach_struct_ops(skel->maps.multi_pages);
+       ASSERT_OK_PTR(link, "attach_multi_pages");
+
+       bpf_link__destroy(link);
+       struct_ops_multi_pages__destroy(skel);
+}
+
+void test_struct_ops_multi_pages(void)
+{
+       if (test__start_subtest("multi_pages"))
+               do_struct_ops_multi_pages();
+}
diff --git a/tools/testing/selftests/bpf/progs/struct_ops_multi_pages.c b/tools/testing/selftests/bpf/progs/struct_ops_multi_pages.c
new file mode 100644 (file)
index 0000000..9efcc6e
--- /dev/null
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
+#include <vmlinux.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include "../bpf_testmod/bpf_testmod.h"
+
+char _license[] SEC("license") = "GPL";
+
+#define TRAMP(x) \
+       SEC("struct_ops/tramp_" #x)             \
+       int BPF_PROG(tramp_ ## x, int a)        \
+       {                                       \
+               return a;                       \
+       }
+
+TRAMP(1)
+TRAMP(2)
+TRAMP(3)
+TRAMP(4)
+TRAMP(5)
+TRAMP(6)
+TRAMP(7)
+TRAMP(8)
+TRAMP(9)
+TRAMP(10)
+TRAMP(11)
+TRAMP(12)
+TRAMP(13)
+TRAMP(14)
+TRAMP(15)
+TRAMP(16)
+TRAMP(17)
+TRAMP(18)
+TRAMP(19)
+TRAMP(20)
+TRAMP(21)
+TRAMP(22)
+TRAMP(23)
+TRAMP(24)
+TRAMP(25)
+TRAMP(26)
+TRAMP(27)
+TRAMP(28)
+TRAMP(29)
+TRAMP(30)
+TRAMP(31)
+TRAMP(32)
+TRAMP(33)
+TRAMP(34)
+TRAMP(35)
+TRAMP(36)
+TRAMP(37)
+TRAMP(38)
+TRAMP(39)
+TRAMP(40)
+
+#define F_TRAMP(x) .tramp_ ## x = (void *)tramp_ ## x
+
+SEC(".struct_ops.link")
+struct bpf_testmod_ops multi_pages = {
+       F_TRAMP(1),
+       F_TRAMP(2),
+       F_TRAMP(3),
+       F_TRAMP(4),
+       F_TRAMP(5),
+       F_TRAMP(6),
+       F_TRAMP(7),
+       F_TRAMP(8),
+       F_TRAMP(9),
+       F_TRAMP(10),
+       F_TRAMP(11),
+       F_TRAMP(12),
+       F_TRAMP(13),
+       F_TRAMP(14),
+       F_TRAMP(15),
+       F_TRAMP(16),
+       F_TRAMP(17),
+       F_TRAMP(18),
+       F_TRAMP(19),
+       F_TRAMP(20),
+       F_TRAMP(21),
+       F_TRAMP(22),
+       F_TRAMP(23),
+       F_TRAMP(24),
+       F_TRAMP(25),
+       F_TRAMP(26),
+       F_TRAMP(27),
+       F_TRAMP(28),
+       F_TRAMP(29),
+       F_TRAMP(30),
+       F_TRAMP(31),
+       F_TRAMP(32),
+       F_TRAMP(33),
+       F_TRAMP(34),
+       F_TRAMP(35),
+       F_TRAMP(36),
+       F_TRAMP(37),
+       F_TRAMP(38),
+       F_TRAMP(39),
+       F_TRAMP(40),
+};