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Date: Sat, 14 Dec 2019 23:08:44 -0800
From: Andrii Nakryiko <andriin@...com>
To: <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <ast@...com>,
<daniel@...earbox.net>
CC: <andrii.nakryiko@...il.com>, <kernel-team@...com>,
Andrii Nakryiko <andriin@...com>
Subject: [PATCH bpf-next 2/2] selftests/bpf: add flexible array relocation tests
Add few tests validation CO-RE relocation handling of flexible array accesses.
Signed-off-by: Andrii Nakryiko <andriin@...com>
---
.../selftests/bpf/prog_tests/core_reloc.c | 4 ++
...f__core_reloc_arrays___equiv_zero_sz_arr.c | 3 ++
..._core_reloc_arrays___err_bad_zero_sz_arr.c | 3 ++
.../btf__core_reloc_arrays___fixed_arr.c | 3 ++
.../selftests/bpf/progs/core_reloc_types.h | 39 +++++++++++++++++++
.../bpf/progs/test_core_reloc_arrays.c | 8 ++--
6 files changed, 56 insertions(+), 4 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___equiv_zero_sz_arr.c
create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___err_bad_zero_sz_arr.c
create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___fixed_arr.c
diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc.c b/tools/testing/selftests/bpf/prog_tests/core_reloc.c
index 05fe85281ff7..31e177adbdf1 100644
--- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c
+++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c
@@ -74,6 +74,7 @@
.b123 = 2, \
.c1c = 3, \
.d00d = 4, \
+ .f10c = 0, \
}, \
.output_len = sizeof(struct core_reloc_arrays_output) \
}
@@ -308,12 +309,15 @@ static struct core_reloc_test_case test_cases[] = {
ARRAYS_CASE(arrays),
ARRAYS_CASE(arrays___diff_arr_dim),
ARRAYS_CASE(arrays___diff_arr_val_sz),
+ ARRAYS_CASE(arrays___equiv_zero_sz_arr),
+ ARRAYS_CASE(arrays___fixed_arr),
ARRAYS_ERR_CASE(arrays___err_too_small),
ARRAYS_ERR_CASE(arrays___err_too_shallow),
ARRAYS_ERR_CASE(arrays___err_non_array),
ARRAYS_ERR_CASE(arrays___err_wrong_val_type1),
ARRAYS_ERR_CASE(arrays___err_wrong_val_type2),
+ ARRAYS_ERR_CASE(arrays___err_bad_zero_sz_arr),
/* enum/ptr/int handling scenarios */
PRIMITIVES_CASE(primitives),
diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___equiv_zero_sz_arr.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___equiv_zero_sz_arr.c
new file mode 100644
index 000000000000..65eac371b061
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___equiv_zero_sz_arr.c
@@ -0,0 +1,3 @@
+#include "core_reloc_types.h"
+
+void f(struct core_reloc_arrays___equiv_zero_sz_arr x) {}
diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___err_bad_zero_sz_arr.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___err_bad_zero_sz_arr.c
new file mode 100644
index 000000000000..ecda2b545ac2
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___err_bad_zero_sz_arr.c
@@ -0,0 +1,3 @@
+#include "core_reloc_types.h"
+
+void f(struct core_reloc_arrays___err_bad_zero_sz_arr x) {}
diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___fixed_arr.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___fixed_arr.c
new file mode 100644
index 000000000000..fe1d01232c22
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___fixed_arr.c
@@ -0,0 +1,3 @@
+#include "core_reloc_types.h"
+
+void f(struct core_reloc_arrays___fixed_arr x) {}
diff --git a/tools/testing/selftests/bpf/progs/core_reloc_types.h b/tools/testing/selftests/bpf/progs/core_reloc_types.h
index 9311489e14b2..6d598cfbdb3e 100644
--- a/tools/testing/selftests/bpf/progs/core_reloc_types.h
+++ b/tools/testing/selftests/bpf/progs/core_reloc_types.h
@@ -327,6 +327,7 @@ struct core_reloc_arrays_output {
char b123;
int c1c;
int d00d;
+ int f10c;
};
struct core_reloc_arrays_substruct {
@@ -339,6 +340,7 @@ struct core_reloc_arrays {
char b[2][3][4];
struct core_reloc_arrays_substruct c[3];
struct core_reloc_arrays_substruct d[1][2];
+ struct core_reloc_arrays_substruct f[][2];
};
/* bigger array dimensions */
@@ -347,6 +349,7 @@ struct core_reloc_arrays___diff_arr_dim {
char b[3][4][5];
struct core_reloc_arrays_substruct c[4];
struct core_reloc_arrays_substruct d[2][3];
+ struct core_reloc_arrays_substruct f[1][3];
};
/* different size of array's value (struct) */
@@ -363,6 +366,29 @@ struct core_reloc_arrays___diff_arr_val_sz {
int d;
int __padding2;
} d[1][2];
+ struct {
+ int __padding1;
+ int c;
+ int __padding2;
+ } f[][2];
+};
+
+struct core_reloc_arrays___equiv_zero_sz_arr {
+ int a[5];
+ char b[2][3][4];
+ struct core_reloc_arrays_substruct c[3];
+ struct core_reloc_arrays_substruct d[1][2];
+ /* equivalent to flexible array */
+ struct core_reloc_arrays_substruct f[0][2];
+};
+
+struct core_reloc_arrays___fixed_arr {
+ int a[5];
+ char b[2][3][4];
+ struct core_reloc_arrays_substruct c[3];
+ struct core_reloc_arrays_substruct d[1][2];
+ /* not a flexible array anymore, but within access bounds */
+ struct core_reloc_arrays_substruct f[1][2];
};
struct core_reloc_arrays___err_too_small {
@@ -370,6 +396,7 @@ struct core_reloc_arrays___err_too_small {
char b[2][3][4];
struct core_reloc_arrays_substruct c[3];
struct core_reloc_arrays_substruct d[1][2];
+ struct core_reloc_arrays_substruct f[][2];
};
struct core_reloc_arrays___err_too_shallow {
@@ -377,6 +404,7 @@ struct core_reloc_arrays___err_too_shallow {
char b[2][3]; /* this one lacks one dimension */
struct core_reloc_arrays_substruct c[3];
struct core_reloc_arrays_substruct d[1][2];
+ struct core_reloc_arrays_substruct f[][2];
};
struct core_reloc_arrays___err_non_array {
@@ -384,6 +412,7 @@ struct core_reloc_arrays___err_non_array {
char b[2][3][4];
struct core_reloc_arrays_substruct c[3];
struct core_reloc_arrays_substruct d[1][2];
+ struct core_reloc_arrays_substruct f[][2];
};
struct core_reloc_arrays___err_wrong_val_type {
@@ -391,6 +420,16 @@ struct core_reloc_arrays___err_wrong_val_type {
char b[2][3][4];
int c[3]; /* value is not a struct */
struct core_reloc_arrays_substruct d[1][2];
+ struct core_reloc_arrays_substruct f[][2];
+};
+
+struct core_reloc_arrays___err_bad_zero_sz_arr {
+ /* zero-sized array, but not at the end */
+ struct core_reloc_arrays_substruct f[0][2];
+ int a[5];
+ char b[2][3][4];
+ struct core_reloc_arrays_substruct c[3];
+ struct core_reloc_arrays_substruct d[1][2];
};
/*
diff --git a/tools/testing/selftests/bpf/progs/test_core_reloc_arrays.c b/tools/testing/selftests/bpf/progs/test_core_reloc_arrays.c
index 89951b684282..053b86f6b53f 100644
--- a/tools/testing/selftests/bpf/progs/test_core_reloc_arrays.c
+++ b/tools/testing/selftests/bpf/progs/test_core_reloc_arrays.c
@@ -18,6 +18,7 @@ struct core_reloc_arrays_output {
char b123;
int c1c;
int d00d;
+ int f01c;
};
struct core_reloc_arrays_substruct {
@@ -30,6 +31,7 @@ struct core_reloc_arrays {
char b[2][3][4];
struct core_reloc_arrays_substruct c[3];
struct core_reloc_arrays_substruct d[1][2];
+ struct core_reloc_arrays_substruct f[][2];
};
#define CORE_READ(dst, src) bpf_core_read(dst, sizeof(*(dst)), src)
@@ -40,18 +42,16 @@ int test_core_arrays(void *ctx)
struct core_reloc_arrays *in = (void *)&data.in;
struct core_reloc_arrays_output *out = (void *)&data.out;
- /* in->a[2] */
if (CORE_READ(&out->a2, &in->a[2]))
return 1;
- /* in->b[1][2][3] */
if (CORE_READ(&out->b123, &in->b[1][2][3]))
return 1;
- /* in->c[1].c */
if (CORE_READ(&out->c1c, &in->c[1].c))
return 1;
- /* in->d[0][0].d */
if (CORE_READ(&out->d00d, &in->d[0][0].d))
return 1;
+ if (CORE_READ(&out->f01c, &in->f[0][1].c))
+ return 1;
return 0;
}
--
2.17.1
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