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Date: Wed, 13 Dec 2017 14:49:10 +0000
From: Stefan Hajnoczi <stefanha@...hat.com>
To: netdev@...r.kernel.org
Cc: Jorgen Hansen <jhansen@...are.com>,
Dexuan Cui <decui@...rosoft.com>,
Stefan Hajnoczi <stefanha@...hat.com>
Subject: [PATCH 4/5] VSOCK: add send_byte()/recv_byte() test utilities
Test cases will want to transfer data. This patch adds utility
functions to do this.
Signed-off-by: Stefan Hajnoczi <stefanha@...hat.com>
---
tools/testing/vsock/util.h | 2 +
tools/testing/vsock/util.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 101 insertions(+)
diff --git a/tools/testing/vsock/util.h b/tools/testing/vsock/util.h
index 3e6971f15caa..cf43d42591bc 100644
--- a/tools/testing/vsock/util.h
+++ b/tools/testing/vsock/util.h
@@ -35,6 +35,8 @@ unsigned int parse_cid(const char *str);
int vsock_stream_connect(unsigned int cid, unsigned int port);
int vsock_stream_accept(unsigned int cid, unsigned int port,
struct sockaddr_vm *clientaddrp);
+void send_byte(int fd, int expected_ret);
+void recv_byte(int fd, int expected_ret);
void run_tests(const struct test_case *test_cases,
const struct test_opts *opts);
diff --git a/tools/testing/vsock/util.c b/tools/testing/vsock/util.c
index 2be923fe9922..e28085a2a429 100644
--- a/tools/testing/vsock/util.c
+++ b/tools/testing/vsock/util.c
@@ -13,6 +13,7 @@
#include <errno.h>
#include <stdio.h>
+#include <stdint.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
@@ -153,6 +154,104 @@ int vsock_stream_accept(unsigned int cid, unsigned int port,
return client_fd;
}
+/* Transmit one byte and check the return value.
+ *
+ * expected_ret:
+ * <0 Negative errno (for testing errors)
+ * 0 End-of-file
+ * 1 Success
+ */
+void send_byte(int fd, int expected_ret)
+{
+ const uint8_t byte = 'A';
+ ssize_t nwritten;
+
+ timeout_begin(TIMEOUT);
+ do {
+ nwritten = write(fd, &byte, sizeof(byte));
+ timeout_check("write");
+ } while (nwritten < 0 && errno == EINTR);
+ timeout_end();
+
+ if (expected_ret < 0) {
+ if (nwritten != -1) {
+ fprintf(stderr, "bogus write(2) return value %zd\n",
+ nwritten);
+ exit(EXIT_FAILURE);
+ }
+ if (errno != -expected_ret) {
+ perror("write");
+ exit(EXIT_FAILURE);
+ }
+ return;
+ }
+
+ if (nwritten < 0) {
+ perror("write");
+ exit(EXIT_FAILURE);
+ }
+ if (nwritten == 0) {
+ if (expected_ret == 0)
+ return;
+
+ fprintf(stderr, "unexpected EOF while sending byte\n");
+ exit(EXIT_FAILURE);
+ }
+ if (nwritten != sizeof(byte)) {
+ fprintf(stderr, "bogus write(2) return value %zd\n", nwritten);
+ exit(EXIT_FAILURE);
+ }
+}
+
+/* Receive one byte and check the return value.
+ *
+ * expected_ret:
+ * <0 Negative errno (for testing errors)
+ * 0 End-of-file
+ * 1 Success
+ */
+void recv_byte(int fd, int expected_ret)
+{
+ uint8_t byte;
+ ssize_t nread;
+
+ timeout_begin(TIMEOUT);
+ do {
+ nread = read(fd, &byte, sizeof(byte));
+ timeout_check("read");
+ } while (nread < 0 && errno == EINTR);
+ timeout_end();
+
+ if (expected_ret < 0) {
+ if (nread != -1) {
+ fprintf(stderr, "bogus read(2) return value %zd\n",
+ nread);
+ exit(EXIT_FAILURE);
+ }
+ if (errno != -expected_ret) {
+ perror("read");
+ exit(EXIT_FAILURE);
+ }
+ return;
+ }
+
+ if (nread < 0) {
+ perror("read");
+ exit(EXIT_FAILURE);
+ }
+ if (nread == 0) {
+ if (expected_ret == 0)
+ return;
+
+ fprintf(stderr, "unexpected EOF while receiving byte\n");
+ exit(EXIT_FAILURE);
+ }
+ if (nread != sizeof(byte)) {
+ fprintf(stderr, "bogus read(2) return value %zd\n", nread);
+ exit(EXIT_FAILURE);
+ }
+}
+
/* Run test cases. The program terminates if a failure occurs. */
void run_tests(const struct test_case *test_cases,
const struct test_opts *opts)
--
2.14.3
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