selftests/bpf: Remove stand-along test_verifier_log test binary

test_prog's prog_tests/verifier_log.c is superseding test_verifier_log
stand-alone test. It cover same checks and adds more, and is also
integrated into test_progs test runner.

Just remove test_verifier_log.c.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230412170655.1866831-1-andrii@kernel.org

tools/testing/selftests/bpf/Makefile

@@ -36,7 +36,7 @@ endif
 
 # Order correspond to 'make run_tests' order
 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
-	test_verifier_log test_dev_cgroup \
+	test_dev_cgroup \
 	test_sock test_sockmap get_cgroup_id_user \
 	test_cgroup_storage \
 	test_tcpnotify_user test_sysctl \

tools/testing/selftests/bpf/test_verifier_log.c

-#include <errno.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/time.h>
-
-#include <linux/bpf.h>
-#include <linux/filter.h>
-#include <linux/unistd.h>
-
-#include <bpf/bpf.h>
-
-#define LOG_SIZE (1 << 20)
-
-#define err(str...)	printf("ERROR: " str)
-
-static const struct bpf_insn code_sample[] = {
-	/* We need a few instructions to pass the min log length */
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
-		     BPF_FUNC_map_lookup_elem),
-	BPF_EXIT_INSN(),
-};
-
-static inline __u64 ptr_to_u64(const void *ptr)
-{
-	return (__u64) (unsigned long) ptr;
-}
-
-static int load(char *log, size_t log_len, int log_level)
-{
-	union bpf_attr attr;
-
-	bzero(&attr, sizeof(attr));
-	attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
-	attr.insn_cnt = (__u32)(sizeof(code_sample) / sizeof(struct bpf_insn));
-	attr.insns = ptr_to_u64(code_sample);
-	attr.license = ptr_to_u64("GPL");
-	attr.log_buf = ptr_to_u64(log);
-	attr.log_size = log_len;
-	attr.log_level = log_level;
-
-	return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
-}
-
-static void check_ret(int ret, int exp_errno)
-{
-	if (ret > 0) {
-		close(ret);
-		err("broken sample loaded successfully!?\n");
-		exit(1);
-	}
-
-	if (!ret || errno != exp_errno) {
-		err("Program load returned: ret:%d/errno:%d, expected ret:%d/errno:%d\n",
-		    ret, errno, -1, exp_errno);
-		exit(1);
-	}
-}
-
-static void check_ones(const char *buf, size_t len, const char *msg)
-{
-	while (len--)
-		if (buf[len] != 1) {
-			err("%s", msg);
-			exit(1);
-		}
-}
-
-static void test_log_good(char *log, size_t buf_len, size_t log_len,
-			  size_t exp_len, int exp_errno, const char *full_log)
-{
-	size_t len;
-	int ret;
-
-	memset(log, 1, buf_len);
-
-	ret = load(log, log_len, 1);
-	check_ret(ret, exp_errno);
-
-	len = strnlen(log, buf_len);
-	if (len == buf_len) {
-		err("verifier did not NULL terminate the log\n");
-		exit(1);
-	}
-	if (exp_len && len != exp_len) {
-		err("incorrect log length expected:%zd have:%zd\n",
-		    exp_len, len);
-		exit(1);
-	}
-
-	if (strchr(log, 1)) {
-		err("verifier leaked a byte through\n");
-		exit(1);
-	}
-
-	check_ones(log + len + 1, buf_len - len - 1,
-		   "verifier wrote bytes past NULL termination\n");
-
-	if (memcmp(full_log, log, LOG_SIZE)) {
-		err("log did not match expected output\n");
-		exit(1);
-	}
-}
-
-static void test_log_bad(char *log, size_t log_len, int log_level)
-{
-	int ret;
-
-	ret = load(log, log_len, log_level);
-	check_ret(ret, EINVAL);
-	if (log)
-		check_ones(log, LOG_SIZE,
-			   "verifier touched log with bad parameters\n");
-}
-
-int main(int argc, char **argv)
-{
-	char full_log[LOG_SIZE];
-	char log[LOG_SIZE];
-	size_t want_len;
-	int i;
-
-	memset(log, 1, LOG_SIZE);
-
-	/* Use libbpf 1.0 API mode */
-	libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
-
-	/* Test incorrect attr */
-	printf("Test log_level 0...\n");
-	test_log_bad(log, LOG_SIZE, 0);
-
-	printf("Test log_size < 128...\n");
-	test_log_bad(log, 15, 1);
-
-	printf("Test log_buff = NULL...\n");
-	test_log_bad(NULL, LOG_SIZE, 1);
-
-	/* Test with log big enough */
-	printf("Test oversized buffer...\n");
-	test_log_good(full_log, LOG_SIZE, LOG_SIZE, 0, EACCES, full_log);
-
-	want_len = strlen(full_log);
-
-	printf("Test exact buffer...\n");
-	test_log_good(log, LOG_SIZE, want_len + 2, want_len, EACCES, full_log);
-
-	printf("Test undersized buffers...\n");
-	for (i = 0; i < 64; i++) {
-		full_log[want_len - i + 1] = 1;
-		full_log[want_len - i] = 0;
-
-		test_log_good(log, LOG_SIZE, want_len + 1 - i, want_len - i,
-			      ENOSPC, full_log);
-	}
-
-	printf("test_verifier_log: OK\n");
-	return 0;
-}