This is a note to let you know that I've just added the patch titled
selftests/bpf: Support checks against a regular expression
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-bpf-support-checks-against-a-regular-expre.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2886f3bb7190cfb9aac724ec35776a137a61f9b4
Author: Cupertino Miranda <cupertino.miranda@xxxxxxxxxx>
Date: Mon Jun 17 15:14:57 2024 +0100
selftests/bpf: Support checks against a regular expression
[ Upstream commit f06ae6194f278444201e0b041a00192d794f83b6 ]
Add support for __regex and __regex_unpriv macros to check the test
execution output against a regular expression. This is similar to __msg
and __msg_unpriv, however those expect do substring matching.
Signed-off-by: Cupertino Miranda <cupertino.miranda@xxxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Acked-by: Eduard Zingerman <eddyz87@xxxxxxxxx>
Link: https://lore.kernel.org/bpf/20240617141458.471620-2-cupertino.miranda@xxxxxxxxxx
Stable-dep-of: f00bb757ed63 ("selftests/bpf: fix to avoid __msg tag de-duplication by clang")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/testing/selftests/bpf/progs/bpf_misc.h b/tools/testing/selftests/bpf/progs/bpf_misc.h
index fb2f5513e29e1..c0280bd2f340d 100644
--- a/tools/testing/selftests/bpf/progs/bpf_misc.h
+++ b/tools/testing/selftests/bpf/progs/bpf_misc.h
@@ -7,9 +7,9 @@
*
* The test_loader sequentially loads each program in a skeleton.
* Programs could be loaded in privileged and unprivileged modes.
- * - __success, __failure, __msg imply privileged mode;
- * - __success_unpriv, __failure_unpriv, __msg_unpriv imply
- * unprivileged mode.
+ * - __success, __failure, __msg, __regex imply privileged mode;
+ * - __success_unpriv, __failure_unpriv, __msg_unpriv, __regex_unpriv
+ * imply unprivileged mode.
* If combination of privileged and unprivileged attributes is present
* both modes are used. If none are present privileged mode is implied.
*
@@ -24,6 +24,9 @@
* Multiple __msg attributes could be specified.
* __msg_unpriv Same as __msg but for unprivileged mode.
*
+ * __regex Same as __msg, but using a regular expression.
+ * __regex_unpriv Same as __msg_unpriv but using a regular expression.
+ *
* __success Expect program load success in privileged mode.
* __success_unpriv Expect program load success in unprivileged mode.
*
@@ -59,10 +62,12 @@
* __auxiliary_unpriv Same, but load program in unprivileged mode.
*/
#define __msg(msg) __attribute__((btf_decl_tag("comment:test_expect_msg=" msg)))
+#define __regex(regex) __attribute__((btf_decl_tag("comment:test_expect_regex=" regex)))
#define __failure __attribute__((btf_decl_tag("comment:test_expect_failure")))
#define __success __attribute__((btf_decl_tag("comment:test_expect_success")))
#define __description(desc) __attribute__((btf_decl_tag("comment:test_description=" desc)))
#define __msg_unpriv(msg) __attribute__((btf_decl_tag("comment:test_expect_msg_unpriv=" msg)))
+#define __regex_unpriv(regex) __attribute__((btf_decl_tag("comment:test_expect_regex_unpriv=" regex)))
#define __failure_unpriv __attribute__((btf_decl_tag("comment:test_expect_failure_unpriv")))
#define __success_unpriv __attribute__((btf_decl_tag("comment:test_expect_success_unpriv")))
#define __log_level(lvl) __attribute__((btf_decl_tag("comment:test_log_level="#lvl)))
diff --git a/tools/testing/selftests/bpf/test_loader.c b/tools/testing/selftests/bpf/test_loader.c
index 524c38e9cde48..f14e10b0de96e 100644
--- a/tools/testing/selftests/bpf/test_loader.c
+++ b/tools/testing/selftests/bpf/test_loader.c
@@ -2,6 +2,7 @@
/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
#include <linux/capability.h>
#include <stdlib.h>
+#include <regex.h>
#include <test_progs.h>
#include <bpf/btf.h>
@@ -17,9 +18,11 @@
#define TEST_TAG_EXPECT_FAILURE "comment:test_expect_failure"
#define TEST_TAG_EXPECT_SUCCESS "comment:test_expect_success"
#define TEST_TAG_EXPECT_MSG_PFX "comment:test_expect_msg="
+#define TEST_TAG_EXPECT_REGEX_PFX "comment:test_expect_regex="
#define TEST_TAG_EXPECT_FAILURE_UNPRIV "comment:test_expect_failure_unpriv"
#define TEST_TAG_EXPECT_SUCCESS_UNPRIV "comment:test_expect_success_unpriv"
#define TEST_TAG_EXPECT_MSG_PFX_UNPRIV "comment:test_expect_msg_unpriv="
+#define TEST_TAG_EXPECT_REGEX_PFX_UNPRIV "comment:test_expect_regex_unpriv="
#define TEST_TAG_LOG_LEVEL_PFX "comment:test_log_level="
#define TEST_TAG_PROG_FLAGS_PFX "comment:test_prog_flags="
#define TEST_TAG_DESCRIPTION_PFX "comment:test_description="
@@ -46,10 +49,16 @@ enum mode {
UNPRIV = 2
};
+struct expect_msg {
+ const char *substr; /* substring match */
+ const char *regex_str; /* regex-based match */
+ regex_t regex;
+};
+
struct test_subspec {
char *name;
bool expect_failure;
- const char **expect_msgs;
+ struct expect_msg *expect_msgs;
size_t expect_msg_cnt;
int retval;
bool execute;
@@ -89,6 +98,16 @@ void test_loader_fini(struct test_loader *tester)
static void free_test_spec(struct test_spec *spec)
{
+ int i;
+
+ /* Deallocate expect_msgs arrays. */
+ for (i = 0; i < spec->priv.expect_msg_cnt; i++)
+ if (spec->priv.expect_msgs[i].regex_str)
+ regfree(&spec->priv.expect_msgs[i].regex);
+ for (i = 0; i < spec->unpriv.expect_msg_cnt; i++)
+ if (spec->unpriv.expect_msgs[i].regex_str)
+ regfree(&spec->unpriv.expect_msgs[i].regex);
+
free(spec->priv.name);
free(spec->unpriv.name);
free(spec->priv.expect_msgs);
@@ -100,18 +119,38 @@ static void free_test_spec(struct test_spec *spec)
spec->unpriv.expect_msgs = NULL;
}
-static int push_msg(const char *msg, struct test_subspec *subspec)
+static int push_msg(const char *substr, const char *regex_str, struct test_subspec *subspec)
{
void *tmp;
+ int regcomp_res;
+ char error_msg[100];
+ struct expect_msg *msg;
- tmp = realloc(subspec->expect_msgs, (1 + subspec->expect_msg_cnt) * sizeof(void *));
+ tmp = realloc(subspec->expect_msgs,
+ (1 + subspec->expect_msg_cnt) * sizeof(struct expect_msg));
if (!tmp) {
ASSERT_FAIL("failed to realloc memory for messages\n");
return -ENOMEM;
}
subspec->expect_msgs = tmp;
- subspec->expect_msgs[subspec->expect_msg_cnt++] = msg;
+ msg = &subspec->expect_msgs[subspec->expect_msg_cnt];
+
+ if (substr) {
+ msg->substr = substr;
+ msg->regex_str = NULL;
+ } else {
+ msg->regex_str = regex_str;
+ msg->substr = NULL;
+ regcomp_res = regcomp(&msg->regex, regex_str, REG_EXTENDED|REG_NEWLINE);
+ if (regcomp_res != 0) {
+ regerror(regcomp_res, &msg->regex, error_msg, sizeof(error_msg));
+ PRINT_FAIL("Regexp compilation error in '%s': '%s'\n",
+ regex_str, error_msg);
+ return -EINVAL;
+ }
+ }
+ subspec->expect_msg_cnt += 1;
return 0;
}
@@ -233,13 +272,25 @@ static int parse_test_spec(struct test_loader *tester,
spec->mode_mask |= UNPRIV;
} else if (str_has_pfx(s, TEST_TAG_EXPECT_MSG_PFX)) {
msg = s + sizeof(TEST_TAG_EXPECT_MSG_PFX) - 1;
- err = push_msg(msg, &spec->priv);
+ err = push_msg(msg, NULL, &spec->priv);
if (err)
goto cleanup;
spec->mode_mask |= PRIV;
} else if (str_has_pfx(s, TEST_TAG_EXPECT_MSG_PFX_UNPRIV)) {
msg = s + sizeof(TEST_TAG_EXPECT_MSG_PFX_UNPRIV) - 1;
- err = push_msg(msg, &spec->unpriv);
+ err = push_msg(msg, NULL, &spec->unpriv);
+ if (err)
+ goto cleanup;
+ spec->mode_mask |= UNPRIV;
+ } else if (str_has_pfx(s, TEST_TAG_EXPECT_REGEX_PFX)) {
+ msg = s + sizeof(TEST_TAG_EXPECT_REGEX_PFX) - 1;
+ err = push_msg(NULL, msg, &spec->priv);
+ if (err)
+ goto cleanup;
+ spec->mode_mask |= PRIV;
+ } else if (str_has_pfx(s, TEST_TAG_EXPECT_REGEX_PFX_UNPRIV)) {
+ msg = s + sizeof(TEST_TAG_EXPECT_REGEX_PFX_UNPRIV) - 1;
+ err = push_msg(NULL, msg, &spec->unpriv);
if (err)
goto cleanup;
spec->mode_mask |= UNPRIV;
@@ -337,16 +388,13 @@ static int parse_test_spec(struct test_loader *tester,
}
if (!spec->unpriv.expect_msgs) {
- size_t sz = spec->priv.expect_msg_cnt * sizeof(void *);
+ for (i = 0; i < spec->priv.expect_msg_cnt; i++) {
+ struct expect_msg *msg = &spec->priv.expect_msgs[i];
- spec->unpriv.expect_msgs = malloc(sz);
- if (!spec->unpriv.expect_msgs) {
- PRINT_FAIL("failed to allocate memory for unpriv.expect_msgs\n");
- err = -ENOMEM;
- goto cleanup;
+ err = push_msg(msg->substr, msg->regex_str, &spec->unpriv);
+ if (err)
+ goto cleanup;
}
- memcpy(spec->unpriv.expect_msgs, spec->priv.expect_msgs, sz);
- spec->unpriv.expect_msg_cnt = spec->priv.expect_msg_cnt;
}
}
@@ -402,27 +450,40 @@ static void validate_case(struct test_loader *tester,
struct bpf_program *prog,
int load_err)
{
- int i, j;
+ int i, j, err;
+ char *match;
+ regmatch_t reg_match[1];
for (i = 0; i < subspec->expect_msg_cnt; i++) {
- char *match;
- const char *expect_msg;
-
- expect_msg = subspec->expect_msgs[i];
+ struct expect_msg *msg = &subspec->expect_msgs[i];
+
+ if (msg->substr) {
+ match = strstr(tester->log_buf + tester->next_match_pos, msg->substr);
+ if (match)
+ tester->next_match_pos = match - tester->log_buf + strlen(msg->substr);
+ } else {
+ err = regexec(&msg->regex,
+ tester->log_buf + tester->next_match_pos, 1, reg_match, 0);
+ if (err == 0) {
+ match = tester->log_buf + tester->next_match_pos + reg_match[0].rm_so;
+ tester->next_match_pos += reg_match[0].rm_eo;
+ } else {
+ match = NULL;
+ }
+ }
- match = strstr(tester->log_buf + tester->next_match_pos, expect_msg);
if (!ASSERT_OK_PTR(match, "expect_msg")) {
- /* if we are in verbose mode, we've already emitted log */
if (env.verbosity == VERBOSE_NONE)
emit_verifier_log(tester->log_buf, true /*force*/);
- for (j = 0; j < i; j++)
- fprintf(stderr,
- "MATCHED MSG: '%s'\n", subspec->expect_msgs[j]);
- fprintf(stderr, "EXPECTED MSG: '%s'\n", expect_msg);
+ for (j = 0; j <= i; j++) {
+ msg = &subspec->expect_msgs[j];
+ fprintf(stderr, "%s %s: '%s'\n",
+ j < i ? "MATCHED " : "EXPECTED",
+ msg->substr ? "SUBSTR" : " REGEX",
+ msg->substr ?: msg->regex_str);
+ }
return;
}
-
- tester->next_match_pos = match - tester->log_buf + strlen(expect_msg);
}
}
