* [PATCH bpf-next v2 2/4] bpf/selftests: add a few helpers for bpftool testing
2026-01-21 15:18 [PATCH bpf-next v2 0/4] selftests/bpf: migrate a few bpftool testing scripts Alexis Lothoré (eBPF Foundation)
2026-01-21 15:18 ` [PATCH bpf-next v2 1/4] selftests/bpf: reorder test_progs sources alphabetically Alexis Lothoré (eBPF Foundation)
@ 2026-01-21 15:18 ` Alexis Lothoré (eBPF Foundation)
2026-01-21 15:18 ` [PATCH bpf-next v2 3/4] selftests/bpf: convert test_bpftool_metadata.sh into test_progs framework Alexis Lothoré (eBPF Foundation)
2026-01-21 15:18 ` [PATCH bpf-next v2 4/4] selftests/bpf: convert test_bpftool_map_access.sh " Alexis Lothoré (eBPF Foundation)
3 siblings, 0 replies; 7+ messages in thread
From: Alexis Lothoré (eBPF Foundation) @ 2026-01-21 15:18 UTC (permalink / raw)
To: Andrii Nakryiko, Eduard Zingerman, Alexei Starovoitov,
Daniel Borkmann, Martin KaFai Lau, Song Liu, Yonghong Song,
John Fastabend, KP Singh, Stanislav Fomichev, Hao Luo, Jiri Olsa,
Shuah Khan, Quentin Monnet
Cc: ebpf, Bastien Curutchet, Thomas Petazzoni, linux-kernel, bpf,
linux-kselftest, Alexis Lothoré (eBPF Foundation)
In order to integrate some bpftool tests into test_progs, define a few
specific helpers that allow to execute bpftool commands, while possibly
retrieving the command output. Those helpers most notably set the
path to the bpftool binary under test. This version checks different
possible paths relative to the directories where the different
test_progs runners are executed, as we want to make sure not to
accidentally use a bootstrap version of the binary.
Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
---
Changes in v2:
- Drop the new runner from commit, keep only the new bpftool-specific
helpers
- replace hardcoded path with a detected (and cached) path
---
tools/testing/selftests/bpf/Makefile | 1 +
tools/testing/selftests/bpf/bpftool_helpers.c | 74 +++++++++++++++++++++++++++
tools/testing/selftests/bpf/bpftool_helpers.h | 11 ++++
3 files changed, 86 insertions(+)
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 0270b0a6dd79..18d5e258841a 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -730,6 +730,7 @@ $(VERIFY_SIG_HDR): $(VERIFICATION_CERT)
TRUNNER_TESTS_DIR := prog_tests
TRUNNER_BPF_PROGS_DIR := progs
TRUNNER_EXTRA_SOURCES := btf_helpers.c \
+ bpftool_helpers.c \
cap_helpers.c \
cgroup_helpers.c \
disasm.c \
diff --git a/tools/testing/selftests/bpf/bpftool_helpers.c b/tools/testing/selftests/bpf/bpftool_helpers.c
new file mode 100644
index 000000000000..a5824945a4a5
--- /dev/null
+++ b/tools/testing/selftests/bpf/bpftool_helpers.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include "bpftool_helpers.h"
+#include <unistd.h>
+#include <string.h>
+#include <stdbool.h>
+
+#define BPFTOOL_PATH_MAX_LEN 64
+#define BPFTOOL_FULL_CMD_MAX_LEN 512
+
+#define BPFTOOL_DEFAULT_PATH "tools/sbin/bpftool"
+
+static int detect_bpftool_path(char *buffer)
+{
+ char tmp[BPFTOOL_PATH_MAX_LEN];
+
+ /* Check default bpftool location (will work if we are running the
+ * default flavor of test_progs)
+ */
+ snprintf(tmp, BPFTOOL_PATH_MAX_LEN, "./%s", BPFTOOL_DEFAULT_PATH);
+ if (access(tmp, X_OK) == 0) {
+ strncpy(buffer, tmp, BPFTOOL_PATH_MAX_LEN);
+ return 0;
+ }
+
+ /* Check alternate bpftool location (will work if we are running a
+ * specific flavor of test_progs, e.g. cpuv4 or no_alu32)
+ */
+ snprintf(tmp, BPFTOOL_PATH_MAX_LEN, "../%s", BPFTOOL_DEFAULT_PATH);
+ if (access(tmp, X_OK) == 0) {
+ strncpy(buffer, tmp, BPFTOOL_PATH_MAX_LEN);
+ return 0;
+ }
+
+ /* Failed to find bpftool binary */
+ return 1;
+}
+
+static int run_command(char *args, char *output_buf, size_t output_max_len)
+{
+ static char bpftool_path[BPFTOOL_PATH_MAX_LEN] = {0};
+ bool suppress_output = !(output_buf && output_max_len);
+ char command[BPFTOOL_FULL_CMD_MAX_LEN];
+ FILE *f;
+ int ret;
+
+ /* Detect and cache bpftool binary location */
+ if (bpftool_path[0] == 0 && detect_bpftool_path(bpftool_path))
+ return 1;
+
+ ret = snprintf(command, BPFTOOL_FULL_CMD_MAX_LEN, "%s %s%s",
+ bpftool_path, args,
+ suppress_output ? " > /dev/null 2>&1" : "");
+
+ f = popen(command, "r");
+ if (!f)
+ return 1;
+
+ if (!suppress_output)
+ fread(output_buf, 1, output_max_len, f);
+ ret = pclose(f);
+
+ return ret;
+}
+
+int run_bpftool_command(char *args)
+{
+ return run_command(args, NULL, 0);
+}
+
+int get_bpftool_command_output(char *args, char *output_buf, size_t output_max_len)
+{
+ return run_command(args, output_buf, output_max_len);
+}
+
diff --git a/tools/testing/selftests/bpf/bpftool_helpers.h b/tools/testing/selftests/bpf/bpftool_helpers.h
new file mode 100644
index 000000000000..dec1ba201410
--- /dev/null
+++ b/tools/testing/selftests/bpf/bpftool_helpers.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#pragma once
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+#define MAX_BPFTOOL_CMD_LEN (256)
+
+int run_bpftool_command(char *args);
+int get_bpftool_command_output(char *args, char *output_buf, size_t output_max_len);
--
2.52.0
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH bpf-next v2 3/4] selftests/bpf: convert test_bpftool_metadata.sh into test_progs framework
2026-01-21 15:18 [PATCH bpf-next v2 0/4] selftests/bpf: migrate a few bpftool testing scripts Alexis Lothoré (eBPF Foundation)
2026-01-21 15:18 ` [PATCH bpf-next v2 1/4] selftests/bpf: reorder test_progs sources alphabetically Alexis Lothoré (eBPF Foundation)
2026-01-21 15:18 ` [PATCH bpf-next v2 2/4] bpf/selftests: add a few helpers for bpftool testing Alexis Lothoré (eBPF Foundation)
@ 2026-01-21 15:18 ` Alexis Lothoré (eBPF Foundation)
2026-01-21 15:18 ` [PATCH bpf-next v2 4/4] selftests/bpf: convert test_bpftool_map_access.sh " Alexis Lothoré (eBPF Foundation)
3 siblings, 0 replies; 7+ messages in thread
From: Alexis Lothoré (eBPF Foundation) @ 2026-01-21 15:18 UTC (permalink / raw)
To: Andrii Nakryiko, Eduard Zingerman, Alexei Starovoitov,
Daniel Borkmann, Martin KaFai Lau, Song Liu, Yonghong Song,
John Fastabend, KP Singh, Stanislav Fomichev, Hao Luo, Jiri Olsa,
Shuah Khan, Quentin Monnet
Cc: ebpf, Bastien Curutchet, Thomas Petazzoni, linux-kernel, bpf,
linux-kselftest, Alexis Lothoré (eBPF Foundation)
The test_bpftool_metadata.sh script validates that bpftool properly
returns in its ouptput any metadata generated by bpf programs through
some .rodata sections.
Port this test to the test_progs framework so that it can be executed
automatically in CI. The new test, similarly to the former script,
checks that valid data appears both for textual output and json output,
as well as for both data not used at all and used data. For the json
check part, the expected json string is hardcoded to avoid bringing a
new external dependency (eg: a json deserializer) for test_progs.
As the test is now converted into test_progs, remove the former script.
The newly converted test brings two new subtests:
#37/1 bpftool_metadata/metadata_unused:OK
#37/2 bpftool_metadata/metadata_used:OK
#37 bpftool_metadata:OK
Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
---
Changes in v2:
- move the new test in prog_tests directory
- use power of 2 for bpftool output buffer size
- check snprintf return when building commands
- target program by pin path rather than prog name
- remove a few blank lines
---
tools/testing/selftests/bpf/Makefile | 1 -
.../selftests/bpf/prog_tests/bpftool_metadata.c | 134 +++++++++++++++++++++
.../testing/selftests/bpf/test_bpftool_metadata.sh | 85 -------------
3 files changed, 134 insertions(+), 86 deletions(-)
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 18d5e258841a..c977b40e3376 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -109,7 +109,6 @@ TEST_PROGS := test_kmod.sh \
test_bpftool_build.sh \
test_bpftool.sh \
test_bpftool_map.sh \
- test_bpftool_metadata.sh \
test_doc_build.sh \
test_xsk.sh \
test_xdp_features.sh
diff --git a/tools/testing/selftests/bpf/prog_tests/bpftool_metadata.c b/tools/testing/selftests/bpf/prog_tests/bpftool_metadata.c
new file mode 100644
index 000000000000..b5598741a01c
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/bpftool_metadata.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <bpftool_helpers.h>
+#include <test_progs.h>
+#include <linux/bpf.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <stdbool.h>
+
+#define BPFFS_DIR "/sys/fs/bpf/test_metadata"
+#define BPFFS_USED BPFFS_DIR "/used"
+#define BPFFS_UNUSED BPFFS_DIR "/unused"
+
+#define BPF_FILE_USED "metadata_used.bpf.o"
+#define BPF_FILE_UNUSED "metadata_unused.bpf.o"
+
+#define MAX_BPFTOOL_OUTPUT_LEN (64*1024)
+
+#define MAX_TOKENS_TO_CHECK 3
+static char output[MAX_BPFTOOL_OUTPUT_LEN];
+
+struct test_desc {
+ char *name;
+ char *bpf_prog;
+ char *bpffs_path;
+ char *expected_output[MAX_TOKENS_TO_CHECK];
+ char *expected_output_json[MAX_TOKENS_TO_CHECK];
+};
+
+static int setup(struct test_desc *test)
+{
+ return mkdir(BPFFS_DIR, 0700);
+}
+
+static void cleanup(struct test_desc *test)
+{
+ unlink(test->bpffs_path);
+ rmdir(BPFFS_DIR);
+}
+
+static int check_metadata(char *buf, char * const *tokens, int count)
+{
+ int i;
+
+ for (i = 0; i < count && tokens[i]; i++)
+ if (!strstr(buf, tokens[i]))
+ return 1;
+
+ return 0;
+}
+
+static void run_test(struct test_desc *test)
+{
+ int ret;
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+
+ ret = snprintf(cmd, MAX_BPFTOOL_CMD_LEN, "prog load %s %s",
+ test->bpf_prog, test->bpffs_path);
+ if (!ASSERT_GT(ret, 0, "format prog insert command"))
+ return;
+ ret = run_bpftool_command(cmd);
+ if (!ASSERT_OK(ret, "load program"))
+ return;
+
+ /* Check output with default format */
+ ret = snprintf(cmd, MAX_BPFTOOL_CMD_LEN, "prog show pinned %s",
+ test->bpffs_path);
+ if (!ASSERT_GT(ret, 0, "format pinned prog check command"))
+ return;
+ ret = get_bpftool_command_output(cmd, output,
+ MAX_BPFTOOL_OUTPUT_LEN);
+ if (ASSERT_OK(ret, "get program info")) {
+ ret = check_metadata(output, test->expected_output,
+ ARRAY_SIZE(test->expected_output));
+ ASSERT_OK(ret, "find metadata");
+ }
+
+ /* Check output with json format */
+ ret = snprintf(cmd, MAX_BPFTOOL_CMD_LEN, "prog -j show pinned %s",
+ test->bpffs_path);
+ if (!ASSERT_GT(ret, 0, "format pinned prog check command in json"))
+ return;
+ ret = get_bpftool_command_output(cmd, output,
+ MAX_BPFTOOL_OUTPUT_LEN);
+ if (ASSERT_OK(ret, "get program info in json")) {
+ ret = check_metadata(output, test->expected_output_json,
+ ARRAY_SIZE(test->expected_output_json));
+ ASSERT_OK(ret, "find metadata in json");
+ }
+
+}
+
+static struct test_desc tests[] = {
+ {
+ .name = "metadata_unused",
+ .bpf_prog = BPF_FILE_UNUSED,
+ .bpffs_path = BPFFS_UNUSED,
+ .expected_output = {
+ "a = \"foo\"",
+ "b = 1"
+ },
+ .expected_output_json = {
+ "\"metadata\":{\"a\":\"foo\",\"b\":1}"
+ }
+ },
+ {
+ .name = "metadata_used",
+ .bpf_prog = BPF_FILE_USED,
+ .bpffs_path = BPFFS_USED,
+ .expected_output = {
+ "a = \"bar\"",
+ "b = 2"
+ },
+ .expected_output_json = {
+ "\"metadata\":{\"a\":\"bar\",\"b\":2}"
+ }
+ }
+};
+static const int tests_count = ARRAY_SIZE(tests);
+
+void test_bpftool_metadata(void)
+{
+ int i;
+
+ for (i = 0; i < tests_count; i++) {
+ if (!test__start_subtest(tests[i].name))
+ continue;
+ if (ASSERT_OK(setup(&tests[i]), "setup bpffs pin dir")) {
+ run_test(&tests[i]);
+ cleanup(&tests[i]);
+ }
+ }
+}
diff --git a/tools/testing/selftests/bpf/test_bpftool_metadata.sh b/tools/testing/selftests/bpf/test_bpftool_metadata.sh
deleted file mode 100755
index b5520692f41b..000000000000
--- a/tools/testing/selftests/bpf/test_bpftool_metadata.sh
+++ /dev/null
@@ -1,85 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-
-# Kselftest framework requirement - SKIP code is 4.
-ksft_skip=4
-
-BPF_FILE_USED="metadata_used.bpf.o"
-BPF_FILE_UNUSED="metadata_unused.bpf.o"
-
-TESTNAME=bpftool_metadata
-BPF_FS=$(awk '$3 == "bpf" {print $2; exit}' /proc/mounts)
-BPF_DIR=$BPF_FS/test_$TESTNAME
-
-_cleanup()
-{
- set +e
- rm -rf $BPF_DIR 2> /dev/null
-}
-
-cleanup_skip()
-{
- echo "selftests: $TESTNAME [SKIP]"
- _cleanup
-
- exit $ksft_skip
-}
-
-cleanup()
-{
- if [ "$?" = 0 ]; then
- echo "selftests: $TESTNAME [PASS]"
- else
- echo "selftests: $TESTNAME [FAILED]"
- fi
- _cleanup
-}
-
-if [ $(id -u) -ne 0 ]; then
- echo "selftests: $TESTNAME [SKIP] Need root privileges"
- exit $ksft_skip
-fi
-
-if [ -z "$BPF_FS" ]; then
- echo "selftests: $TESTNAME [SKIP] Could not run test without bpffs mounted"
- exit $ksft_skip
-fi
-
-if ! bpftool version > /dev/null 2>&1; then
- echo "selftests: $TESTNAME [SKIP] Could not run test without bpftool"
- exit $ksft_skip
-fi
-
-set -e
-
-trap cleanup_skip EXIT
-
-mkdir $BPF_DIR
-
-trap cleanup EXIT
-
-bpftool prog load $BPF_FILE_UNUSED $BPF_DIR/unused
-
-METADATA_PLAIN="$(bpftool prog)"
-echo "$METADATA_PLAIN" | grep 'a = "foo"' > /dev/null
-echo "$METADATA_PLAIN" | grep 'b = 1' > /dev/null
-
-bpftool prog --json | grep '"metadata":{"a":"foo","b":1}' > /dev/null
-
-bpftool map | grep 'metadata.rodata' > /dev/null
-
-rm $BPF_DIR/unused
-
-bpftool prog load $BPF_FILE_USED $BPF_DIR/used
-
-METADATA_PLAIN="$(bpftool prog)"
-echo "$METADATA_PLAIN" | grep 'a = "bar"' > /dev/null
-echo "$METADATA_PLAIN" | grep 'b = 2' > /dev/null
-
-bpftool prog --json | grep '"metadata":{"a":"bar","b":2}' > /dev/null
-
-bpftool map | grep 'metadata.rodata' > /dev/null
-
-rm $BPF_DIR/used
-
-exit 0
--
2.52.0
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH bpf-next v2 4/4] selftests/bpf: convert test_bpftool_map_access.sh into test_progs framework
2026-01-21 15:18 [PATCH bpf-next v2 0/4] selftests/bpf: migrate a few bpftool testing scripts Alexis Lothoré (eBPF Foundation)
` (2 preceding siblings ...)
2026-01-21 15:18 ` [PATCH bpf-next v2 3/4] selftests/bpf: convert test_bpftool_metadata.sh into test_progs framework Alexis Lothoré (eBPF Foundation)
@ 2026-01-21 15:18 ` Alexis Lothoré (eBPF Foundation)
3 siblings, 0 replies; 7+ messages in thread
From: Alexis Lothoré (eBPF Foundation) @ 2026-01-21 15:18 UTC (permalink / raw)
To: Andrii Nakryiko, Eduard Zingerman, Alexei Starovoitov,
Daniel Borkmann, Martin KaFai Lau, Song Liu, Yonghong Song,
John Fastabend, KP Singh, Stanislav Fomichev, Hao Luo, Jiri Olsa,
Shuah Khan, Quentin Monnet
Cc: ebpf, Bastien Curutchet, Thomas Petazzoni, linux-kernel, bpf,
linux-kselftest, Alexis Lothoré (eBPF Foundation)
The test_bpftool_map.sh script tests that maps read/write accesses
are being properly allowed/refused by the kernel depending on a specific
fmod_ret program being attached on security_bpf_map function.
Rewrite this test to integrate it in the test_progs. The
new test spawns a few subtests:
#36/1 bpftool_maps_access/unprotected_unpinned:OK
#36/2 bpftool_maps_access/unprotected_pinned:OK
#36/3 bpftool_maps_access/protected_unpinned:OK
#36/4 bpftool_maps_access/protected_pinned:OK
#36/5 bpftool_maps_access/nested_maps:OK
#36/6 bpftool_maps_access/btf_list:OK
#36 bpftool_maps_access:OK
Summary: 1/6 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
Acked-by: Quentin Monnet <qmo@kernel.org>
---
Changes in v2:
- move the new test in prog_tests directory
- collect Quentin's AB
---
tools/testing/selftests/bpf/Makefile | 1 -
.../selftests/bpf/prog_tests/bpftool_maps_access.c | 371 +++++++++++++++++++
tools/testing/selftests/bpf/test_bpftool_map.sh | 398 ---------------------
3 files changed, 371 insertions(+), 399 deletions(-)
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index c977b40e3376..d849dbed1794 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -108,7 +108,6 @@ TEST_PROGS := test_kmod.sh \
test_xdping.sh \
test_bpftool_build.sh \
test_bpftool.sh \
- test_bpftool_map.sh \
test_doc_build.sh \
test_xsk.sh \
test_xdp_features.sh
diff --git a/tools/testing/selftests/bpf/prog_tests/bpftool_maps_access.c b/tools/testing/selftests/bpf/prog_tests/bpftool_maps_access.c
new file mode 100644
index 000000000000..e0eb869cb1b4
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/bpftool_maps_access.c
@@ -0,0 +1,371 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <sys/stat.h>
+#include <stdbool.h>
+#include <linux/bpf.h>
+#include <bpf/libbpf.h>
+#include <bpftool_helpers.h>
+#include <test_progs.h>
+#include <bpf/bpf.h>
+#include "security_bpf_map.skel.h"
+
+#define PROTECTED_MAP_NAME "prot_map"
+#define UNPROTECTED_MAP_NAME "not_prot_map"
+#define BPF_ITER_FILE "bpf_iter_map_elem.bpf.o"
+#define BPFFS_PIN_DIR "/sys/fs/bpf/test_bpftool_map"
+#define INNER_MAP_NAME "inner_map_tt"
+#define OUTER_MAP_NAME "outer_map_tt"
+
+#define MAP_NAME_MAX_LEN 64
+#define PATH_MAX_LEN 128
+
+enum map_protection {
+ PROTECTED,
+ UNPROTECTED
+};
+
+struct test_desc {
+ char *name;
+ enum map_protection protection;
+ struct bpf_map *map;
+ char *map_name;
+ bool pinned;
+ char pin_path[PATH_MAX_LEN];
+ bool write_must_fail;
+};
+
+static struct security_bpf_map *general_setup(void)
+{
+ struct security_bpf_map *skel;
+ uint32_t key, value;
+ int ret, i;
+
+ skel = security_bpf_map__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "open and load skeleton"))
+ goto end;
+
+ struct bpf_map *maps[] = {skel->maps.prot_map, skel->maps.not_prot_map};
+
+ ret = security_bpf_map__attach(skel);
+ if (!ASSERT_OK(ret, "attach maps security programs"))
+ goto end_destroy;
+
+ for (i = 0; i < sizeof(maps)/sizeof(struct bpf_map *); i++) {
+ for (key = 0; key < 2; key++) {
+ int ret = bpf_map__update_elem(maps[i], &key,
+ sizeof(key), &key, sizeof(key),
+ 0);
+ if (!ASSERT_OK(ret, "set initial map value"))
+ goto end_destroy;
+ }
+ }
+
+ key = 0;
+ value = 1;
+ ret = bpf_map__update_elem(skel->maps.prot_status_map, &key,
+ sizeof(key), &value, sizeof(value), 0);
+ if (!ASSERT_OK(ret, "configure map protection"))
+ goto end_destroy;
+
+ if (!ASSERT_OK(mkdir(BPFFS_PIN_DIR, S_IFDIR), "create bpffs pin dir"))
+ goto end_destroy;
+
+ return skel;
+end_destroy:
+ security_bpf_map__destroy(skel);
+end:
+ return NULL;
+}
+
+static void general_cleanup(struct security_bpf_map *skel)
+{
+ rmdir(BPFFS_PIN_DIR);
+ security_bpf_map__destroy(skel);
+}
+
+static void update_test_desc(struct security_bpf_map *skel,
+ struct test_desc *test)
+{
+ /* Now that the skeleton is loaded, update all missing fields to
+ * have the subtest properly configured
+ */
+ if (test->protection == PROTECTED) {
+ test->map = skel->maps.prot_map;
+ test->map_name = PROTECTED_MAP_NAME;
+ } else {
+ test->map = skel->maps.not_prot_map;
+ test->map_name = UNPROTECTED_MAP_NAME;
+ }
+}
+
+static int test_setup(struct security_bpf_map *skel, struct test_desc *desc)
+{
+ int ret;
+
+ update_test_desc(skel, desc);
+
+ if (desc->pinned) {
+ ret = snprintf(desc->pin_path, PATH_MAX_LEN, "%s/%s", BPFFS_PIN_DIR,
+ desc->name);
+ if (!ASSERT_GT(ret, 0, "format pin path"))
+ return 1;
+ ret = bpf_map__pin(desc->map, desc->pin_path);
+ if (!ASSERT_OK(ret, "pin map"))
+ return 1;
+ }
+
+ return 0;
+}
+
+static void test_cleanup(struct test_desc *desc)
+{
+ if (desc->pinned)
+ bpf_map__unpin(desc->map, NULL);
+}
+
+static int lookup_map_value(char *map_handle)
+{
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+ int ret = 0;
+
+ ret = snprintf(cmd, MAX_BPFTOOL_CMD_LEN, "map lookup %s key 0 0 0 0",
+ map_handle);
+ if (!ASSERT_GT(ret, 0, "format map lookup cmd"))
+ return 1;
+ return run_bpftool_command(cmd);
+}
+
+static int read_map_btf_data(char *map_handle)
+{
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+ int ret = 0;
+
+ ret = snprintf(cmd, MAX_BPFTOOL_CMD_LEN, "btf dump map %s",
+ map_handle);
+ if (!ASSERT_GT(ret, 0, "format map btf dump cmd"))
+ return 1;
+ return run_bpftool_command(cmd);
+}
+
+static int write_map_value(char *map_handle)
+{
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+ int ret = 0;
+
+ ret = snprintf(cmd, MAX_BPFTOOL_CMD_LEN,
+ "map update %s key 0 0 0 0 value 1 1 1 1", map_handle);
+ if (!ASSERT_GT(ret, 0, "format value write cmd"))
+ return 1;
+ return run_bpftool_command(cmd);
+}
+
+static int delete_map_value(char *map_handle)
+{
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+ int ret = 0;
+
+ ret = snprintf(cmd, MAX_BPFTOOL_CMD_LEN,
+ "map delete %s key 0 0 0 0", map_handle);
+ if (!ASSERT_GT(ret, 0, "format value deletion cmd"))
+ return 1;
+ return run_bpftool_command(cmd);
+}
+
+static int iterate_on_map_values(char *map_handle, char *iter_pin_path)
+{
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+ int ret = 0;
+
+
+ ret = snprintf(cmd, MAX_BPFTOOL_CMD_LEN, "iter pin %s %s map %s",
+ BPF_ITER_FILE, iter_pin_path, map_handle);
+ if (!ASSERT_GT(ret, 0, "format iterator creation cmd"))
+ return 1;
+ ret = run_bpftool_command(cmd);
+ if (ret)
+ return ret;
+ ret = snprintf(cmd, MAP_NAME_MAX_LEN, "cat %s", iter_pin_path);
+ if (ret < 0)
+ goto cleanup;
+ ret = system(cmd);
+
+cleanup:
+ unlink(iter_pin_path);
+ return ret;
+}
+
+static int create_inner_map(void)
+{
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+ int ret = 0;
+
+ ret = snprintf(
+ cmd, MAX_BPFTOOL_CMD_LEN,
+ "map create %s/%s type array key 4 value 4 entries 4 name %s",
+ BPFFS_PIN_DIR, INNER_MAP_NAME, INNER_MAP_NAME);
+ if (!ASSERT_GT(ret, 0, "format inner map create cmd"))
+ return 1;
+ return run_bpftool_command(cmd);
+}
+
+static int create_outer_map(void)
+{
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+ int ret = 0;
+
+ ret = snprintf(
+ cmd, MAX_BPFTOOL_CMD_LEN,
+ "map create %s/%s type hash_of_maps key 4 value 4 entries 2 name %s inner_map name %s",
+ BPFFS_PIN_DIR, OUTER_MAP_NAME, OUTER_MAP_NAME, INNER_MAP_NAME);
+ if (!ASSERT_GT(ret, 0, "format outer map create cmd"))
+ return 1;
+ return run_bpftool_command(cmd);
+}
+
+static void delete_pinned_map(char *map_name)
+{
+ char pin_path[PATH_MAX_LEN];
+ int ret;
+
+ ret = snprintf(pin_path, PATH_MAX_LEN, "%s/%s", BPFFS_PIN_DIR,
+ map_name);
+ if (ret >= 0)
+ unlink(pin_path);
+}
+
+static int add_outer_map_entry(int key)
+{
+ char cmd[MAX_BPFTOOL_CMD_LEN];
+ int ret = 0;
+
+ ret = snprintf(
+ cmd, MAX_BPFTOOL_CMD_LEN,
+ "map update pinned %s/%s key %d 0 0 0 value name %s",
+ BPFFS_PIN_DIR, OUTER_MAP_NAME, key, INNER_MAP_NAME);
+ if (!ASSERT_GT(ret, 0, "format outer map value addition cmd"))
+ return 1;
+ return run_bpftool_command(cmd);
+}
+
+static void test_basic_access(struct test_desc *desc)
+{
+ char map_handle[MAP_NAME_MAX_LEN];
+ char iter_pin_path[PATH_MAX_LEN];
+ int ret;
+
+ if (desc->pinned)
+ ret = snprintf(map_handle, MAP_NAME_MAX_LEN, "pinned %s",
+ desc->pin_path);
+ else
+ ret = snprintf(map_handle, MAP_NAME_MAX_LEN, "name %s",
+ desc->map_name);
+ if (!ASSERT_GT(ret, 0, "format map handle"))
+ return;
+
+ ret = lookup_map_value(map_handle);
+ ASSERT_OK(ret, "read map value");
+
+ ret = read_map_btf_data(map_handle);
+ ASSERT_OK(ret, "read map btf data");
+
+ ret = write_map_value(map_handle);
+ ASSERT_OK(desc->write_must_fail ? !ret : ret, "write map value");
+
+ ret = delete_map_value(map_handle);
+ ASSERT_OK(desc->write_must_fail ? !ret : ret, "delete map value");
+ /* Restore deleted value */
+ if (!ret)
+ write_map_value(map_handle);
+
+ ret = snprintf(iter_pin_path, PATH_MAX_LEN, "%s/iter", BPFFS_PIN_DIR);
+ if (ASSERT_GT(ret, 0, "format iter pin path")) {
+ ret = iterate_on_map_values(map_handle, iter_pin_path);
+ ASSERT_OK(ret, "iterate on map values");
+ }
+}
+
+static void test_create_nested_maps(void)
+{
+ if (!ASSERT_OK(create_inner_map(), "create inner map"))
+ return;
+ if (!ASSERT_OK(create_outer_map(), "create outer map"))
+ goto end_cleanup_inner;
+ ASSERT_OK(add_outer_map_entry(0), "add a first entry in outer map");
+ ASSERT_OK(add_outer_map_entry(1), "add a second entry in outer map");
+ ASSERT_NEQ(add_outer_map_entry(2), 0, "add a third entry in outer map");
+
+ delete_pinned_map(OUTER_MAP_NAME);
+end_cleanup_inner:
+ delete_pinned_map(INNER_MAP_NAME);
+}
+
+static void test_btf_list(void)
+{
+ ASSERT_OK(run_bpftool_command("btf list"), "list btf data");
+}
+
+static struct test_desc tests[] = {
+ {
+ .name = "unprotected_unpinned",
+ .protection = UNPROTECTED,
+ .map_name = UNPROTECTED_MAP_NAME,
+ .pinned = false,
+ .write_must_fail = false,
+ },
+ {
+ .name = "unprotected_pinned",
+ .protection = UNPROTECTED,
+ .map_name = UNPROTECTED_MAP_NAME,
+ .pinned = true,
+ .write_must_fail = false,
+ },
+ {
+ .name = "protected_unpinned",
+ .protection = PROTECTED,
+ .map_name = UNPROTECTED_MAP_NAME,
+ .pinned = false,
+ .write_must_fail = true,
+ },
+ {
+ .name = "protected_pinned",
+ .protection = PROTECTED,
+ .map_name = UNPROTECTED_MAP_NAME,
+ .pinned = true,
+ .write_must_fail = true,
+ }
+};
+
+static const size_t tests_count = ARRAY_SIZE(tests);
+
+void test_bpftool_maps_access(void)
+{
+ struct security_bpf_map *skel;
+ struct test_desc *current;
+ int i;
+
+ skel = general_setup();
+ if (!ASSERT_OK_PTR(skel, "prepare programs"))
+ goto cleanup;
+
+ for (i = 0; i < tests_count; i++) {
+ current = &tests[i];
+ if (!test__start_subtest(current->name))
+ continue;
+ if (ASSERT_OK(test_setup(skel, current), "subtest setup")) {
+ test_basic_access(current);
+ test_cleanup(current);
+ }
+ }
+ if (test__start_subtest("nested_maps"))
+ test_create_nested_maps();
+ if (test__start_subtest("btf_list"))
+ test_btf_list();
+
+cleanup:
+ general_cleanup(skel);
+}
+
diff --git a/tools/testing/selftests/bpf/test_bpftool_map.sh b/tools/testing/selftests/bpf/test_bpftool_map.sh
deleted file mode 100755
index 515b1df0501e..000000000000
--- a/tools/testing/selftests/bpf/test_bpftool_map.sh
+++ /dev/null
@@ -1,398 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-
-# Kselftest framework requirement - SKIP code is 4.
-ksft_skip=4
-
-TESTNAME="bpftool_map"
-BPF_FILE="security_bpf_map.bpf.o"
-BPF_ITER_FILE="bpf_iter_map_elem.bpf.o"
-PROTECTED_MAP_NAME="prot_map"
-NOT_PROTECTED_MAP_NAME="not_prot_map"
-BPF_FS_TMP_PARENT="/tmp"
-BPF_FS_PARENT=$(awk '$3 == "bpf" {print $2; exit}' /proc/mounts)
-BPF_FS_PARENT=${BPF_FS_PARENT:-$BPF_FS_TMP_PARENT}
-# bpftool will mount bpf file system under BPF_DIR if it is not mounted
-# under BPF_FS_PARENT.
-BPF_DIR="$BPF_FS_PARENT/test_$TESTNAME"
-SCRIPT_DIR=$(dirname $(realpath "$0"))
-BPF_FILE_PATH="$SCRIPT_DIR/$BPF_FILE"
-BPF_ITER_FILE_PATH="$SCRIPT_DIR/$BPF_ITER_FILE"
-BPFTOOL_PATH="bpftool"
-# Assume the script is located under tools/testing/selftests/bpf/
-KDIR_ROOT_DIR=$(realpath "$SCRIPT_DIR"/../../../../)
-
-_cleanup()
-{
- set +eu
-
- # If BPF_DIR is a mount point this will not remove the mount point itself.
- [ -d "$BPF_DIR" ] && rm -rf "$BPF_DIR" 2> /dev/null
-
- # Unmount if BPF filesystem was temporarily created.
- if [ "$BPF_FS_PARENT" = "$BPF_FS_TMP_PARENT" ]; then
- # A loop and recursive unmount are required as bpftool might
- # create multiple mounts. For example, a bind mount of the directory
- # to itself. The bind mount is created to change mount propagation
- # flags on an actual mount point.
- max_attempts=3
- attempt=0
- while mountpoint -q "$BPF_DIR" && [ $attempt -lt $max_attempts ]; do
- umount -R "$BPF_DIR" 2>/dev/null
- attempt=$((attempt+1))
- done
-
- # The directory still exists. Remove it now.
- [ -d "$BPF_DIR" ] && rm -rf "$BPF_DIR" 2>/dev/null
- fi
-}
-
-cleanup_skip()
-{
- echo "selftests: $TESTNAME [SKIP]"
- _cleanup
-
- exit $ksft_skip
-}
-
-cleanup()
-{
- if [ "$?" = 0 ]; then
- echo "selftests: $TESTNAME [PASS]"
- else
- echo "selftests: $TESTNAME [FAILED]"
- fi
- _cleanup
-}
-
-check_root_privileges() {
- if [ $(id -u) -ne 0 ]; then
- echo "Need root privileges"
- exit $ksft_skip
- fi
-}
-
-# Function to verify bpftool path.
-# Parameters:
-# $1: bpftool path
-verify_bpftool_path() {
- local bpftool_path="$1"
- if ! "$bpftool_path" version > /dev/null 2>&1; then
- echo "Could not run test without bpftool"
- exit $ksft_skip
- fi
-}
-
-# Function to verify BTF support.
-# The test requires BTF support for fmod_ret programs.
-verify_btf_support() {
- if [ ! -f /sys/kernel/btf/vmlinux ]; then
- echo "Could not run test without BTF support"
- exit $ksft_skip
- fi
-}
-
-# Function to initialize map entries with keys [0..2] and values set to 0.
-# Parameters:
-# $1: Map name
-# $2: bpftool path
-initialize_map_entries() {
- local map_name="$1"
- local bpftool_path="$2"
-
- for key in 0 1 2; do
- "$bpftool_path" map update name "$map_name" key $key 0 0 0 value 0 0 0 $key
- done
-}
-
-# Test read access to the map.
-# Parameters:
-# $1: Name command (name/pinned)
-# $2: Map name
-# $3: bpftool path
-# $4: key
-access_for_read() {
- local name_cmd="$1"
- local map_name="$2"
- local bpftool_path="$3"
- local key="$4"
-
- # Test read access to the map.
- if ! "$bpftool_path" map lookup "$name_cmd" "$map_name" key $key 1>/dev/null; then
- echo " Read access to $key in $map_name failed"
- exit 1
- fi
-
- # Test read access to map's BTF data.
- if ! "$bpftool_path" btf dump map "$name_cmd" "$map_name" 1>/dev/null; then
- echo " Read access to $map_name for BTF data failed"
- exit 1
- fi
-}
-
-# Test write access to the map.
-# Parameters:
-# $1: Name command (name/pinned)
-# $2: Map name
-# $3: bpftool path
-# $4: key
-# $5: Whether write should succeed (true/false)
-access_for_write() {
- local name_cmd="$1"
- local map_name="$2"
- local bpftool_path="$3"
- local key="$4"
- local write_should_succeed="$5"
- local value="1 1 1 1"
-
- if "$bpftool_path" map update "$name_cmd" "$map_name" key $key value \
- $value 2>/dev/null; then
- if [ "$write_should_succeed" = "false" ]; then
- echo " Write access to $key in $map_name succeeded but should have failed"
- exit 1
- fi
- else
- if [ "$write_should_succeed" = "true" ]; then
- echo " Write access to $key in $map_name failed but should have succeeded"
- exit 1
- fi
- fi
-}
-
-# Test entry deletion for the map.
-# Parameters:
-# $1: Name command (name/pinned)
-# $2: Map name
-# $3: bpftool path
-# $4: key
-# $5: Whether write should succeed (true/false)
-access_for_deletion() {
- local name_cmd="$1"
- local map_name="$2"
- local bpftool_path="$3"
- local key="$4"
- local write_should_succeed="$5"
- local value="1 1 1 1"
-
- # Test deletion by key for the map.
- # Before deleting, check the key exists.
- if ! "$bpftool_path" map lookup "$name_cmd" "$map_name" key $key 1>/dev/null; then
- echo " Key $key does not exist in $map_name"
- exit 1
- fi
-
- # Delete by key.
- if "$bpftool_path" map delete "$name_cmd" "$map_name" key $key 2>/dev/null; then
- if [ "$write_should_succeed" = "false" ]; then
- echo " Deletion for $key in $map_name succeeded but should have failed"
- exit 1
- fi
- else
- if [ "$write_should_succeed" = "true" ]; then
- echo " Deletion for $key in $map_name failed but should have succeeded"
- exit 1
- fi
- fi
-
- # After deleting, check the entry existence according to the expected status.
- if "$bpftool_path" map lookup "$name_cmd" "$map_name" key $key 1>/dev/null; then
- if [ "$write_should_succeed" = "true" ]; then
- echo " Key $key for $map_name was not deleted but should have been deleted"
- exit 1
- fi
- else
- if [ "$write_should_succeed" = "false" ]; then
- echo "Key $key for $map_name was deleted but should have not been deleted"
- exit 1
- fi
- fi
-
- # Test creation of map's deleted entry, if deletion was successful.
- # Otherwise, the entry exists.
- if "$bpftool_path" map update "$name_cmd" "$map_name" key $key value \
- $value 2>/dev/null; then
- if [ "$write_should_succeed" = "false" ]; then
- echo " Write access to $key in $map_name succeeded after deletion attempt but should have failed"
- exit 1
- fi
- else
- if [ "$write_should_succeed" = "true" ]; then
- echo " Write access to $key in $map_name failed after deletion attempt but should have succeeded"
- exit 1
- fi
- fi
-}
-
-# Test map elements iterator.
-# Parameters:
-# $1: Name command (name/pinned)
-# $2: Map name
-# $3: bpftool path
-# $4: BPF_DIR
-# $5: bpf iterator object file path
-iterate_map_elem() {
- local name_cmd="$1"
- local map_name="$2"
- local bpftool_path="$3"
- local bpf_dir="$4"
- local bpf_file="$5"
- local pin_path="$bpf_dir/map_iterator"
-
- "$bpftool_path" iter pin "$bpf_file" "$pin_path" map "$name_cmd" "$map_name"
- if [ ! -f "$pin_path" ]; then
- echo " Failed to pin iterator to $pin_path"
- exit 1
- fi
-
- cat "$pin_path" 1>/dev/null
- rm "$pin_path" 2>/dev/null
-}
-
-# Function to test map access with configurable write expectations
-# Parameters:
-# $1: Name command (name/pinned)
-# $2: Map name
-# $3: bpftool path
-# $4: key for rw
-# $5: key to delete
-# $6: Whether write should succeed (true/false)
-# $7: BPF_DIR
-# $8: bpf iterator object file path
-access_map() {
- local name_cmd="$1"
- local map_name="$2"
- local bpftool_path="$3"
- local key_for_rw="$4"
- local key_to_del="$5"
- local write_should_succeed="$6"
- local bpf_dir="$7"
- local bpf_iter_file_path="$8"
-
- access_for_read "$name_cmd" "$map_name" "$bpftool_path" "$key_for_rw"
- access_for_write "$name_cmd" "$map_name" "$bpftool_path" "$key_for_rw" \
- "$write_should_succeed"
- access_for_deletion "$name_cmd" "$map_name" "$bpftool_path" "$key_to_del" \
- "$write_should_succeed"
- iterate_map_elem "$name_cmd" "$map_name" "$bpftool_path" "$bpf_dir" \
- "$bpf_iter_file_path"
-}
-
-# Function to test map access with configurable write expectations
-# Parameters:
-# $1: Map name
-# $2: bpftool path
-# $3: BPF_DIR
-# $4: Whether write should succeed (true/false)
-# $5: bpf iterator object file path
-test_map_access() {
- local map_name="$1"
- local bpftool_path="$2"
- local bpf_dir="$3"
- local pin_path="$bpf_dir/${map_name}_pinned"
- local write_should_succeed="$4"
- local bpf_iter_file_path="$5"
-
- # Test access to the map by name.
- access_map "name" "$map_name" "$bpftool_path" "0 0 0 0" "1 0 0 0" \
- "$write_should_succeed" "$bpf_dir" "$bpf_iter_file_path"
-
- # Pin the map to the BPF filesystem
- "$bpftool_path" map pin name "$map_name" "$pin_path"
- if [ ! -e "$pin_path" ]; then
- echo " Failed to pin $map_name"
- exit 1
- fi
-
- # Test access to the pinned map.
- access_map "pinned" "$pin_path" "$bpftool_path" "0 0 0 0" "2 0 0 0" \
- "$write_should_succeed" "$bpf_dir" "$bpf_iter_file_path"
-}
-
-# Function to test map creation and map-of-maps
-# Parameters:
-# $1: bpftool path
-# $2: BPF_DIR
-test_map_creation_and_map_of_maps() {
- local bpftool_path="$1"
- local bpf_dir="$2"
- local outer_map_name="outer_map_tt"
- local inner_map_name="inner_map_tt"
-
- "$bpftool_path" map create "$bpf_dir/$inner_map_name" type array key 4 \
- value 4 entries 4 name "$inner_map_name"
- if [ ! -f "$bpf_dir/$inner_map_name" ]; then
- echo " Failed to create inner map file at $bpf_dir/$outer_map_name"
- return 1
- fi
-
- "$bpftool_path" map create "$bpf_dir/$outer_map_name" type hash_of_maps \
- key 4 value 4 entries 2 name "$outer_map_name" inner_map name "$inner_map_name"
- if [ ! -f "$bpf_dir/$outer_map_name" ]; then
- echo " Failed to create outer map file at $bpf_dir/$outer_map_name"
- return 1
- fi
-
- # Add entries to the outer map by name and by pinned path.
- "$bpftool_path" map update pinned "$bpf_dir/$outer_map_name" key 0 0 0 0 \
- value pinned "$bpf_dir/$inner_map_name"
- "$bpftool_path" map update name "$outer_map_name" key 1 0 0 0 value \
- name "$inner_map_name"
-
- # The outer map should be full by now.
- # The following map update command is expected to fail.
- if "$bpftool_path" map update name "$outer_map_name" key 2 0 0 0 value name \
- "$inner_map_name" 2>/dev/null; then
- echo " Update for $outer_map_name succeeded but should have failed"
- exit 1
- fi
-}
-
-# Function to test map access with the btf list command
-# Parameters:
-# $1: bpftool path
-test_map_access_with_btf_list() {
- local bpftool_path="$1"
-
- # The btf list command iterates over maps for
- # loaded BPF programs.
- if ! "$bpftool_path" btf list 1>/dev/null; then
- echo " Failed to access btf data"
- exit 1
- fi
-}
-
-set -eu
-
-trap cleanup_skip EXIT
-
-check_root_privileges
-
-verify_bpftool_path "$BPFTOOL_PATH"
-
-verify_btf_support
-
-trap cleanup EXIT
-
-# Load and attach the BPF programs to control maps access.
-"$BPFTOOL_PATH" prog loadall "$BPF_FILE_PATH" "$BPF_DIR" autoattach
-
-initialize_map_entries "$PROTECTED_MAP_NAME" "$BPFTOOL_PATH"
-initialize_map_entries "$NOT_PROTECTED_MAP_NAME" "$BPFTOOL_PATH"
-
-# Activate the map protection mechanism. Protection status is controlled
-# by a value stored in the prot_status_map at index 0.
-"$BPFTOOL_PATH" map update name prot_status_map key 0 0 0 0 value 1 0 0 0
-
-# Test protected map (write should fail).
-test_map_access "$PROTECTED_MAP_NAME" "$BPFTOOL_PATH" "$BPF_DIR" "false" \
- "$BPF_ITER_FILE_PATH"
-
-# Test not protected map (write should succeed).
-test_map_access "$NOT_PROTECTED_MAP_NAME" "$BPFTOOL_PATH" "$BPF_DIR" "true" \
- "$BPF_ITER_FILE_PATH"
-
-test_map_creation_and_map_of_maps "$BPFTOOL_PATH" "$BPF_DIR"
-
-test_map_access_with_btf_list "$BPFTOOL_PATH"
-
-exit 0
--
2.52.0
^ permalink raw reply related [flat|nested] 7+ messages in thread