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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@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Hajnoczi 2019-12-18 19:07:03 +01:00 committed by David S. Miller
parent 2f65b44e19
commit 092f32ae62
2 changed files with 105 additions and 0 deletions
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103
tools/testing/vsock/util.c
View File

@ -9,6 +9,7 @@
#include <errno.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
@ -149,6 +150,108 @@ 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, int flags)
{
const uint8_t byte = 'A';
ssize_t nwritten;
timeout_begin(TIMEOUT);
do {
nwritten = send(fd, &byte, sizeof(byte), flags);
timeout_check("write");
} while (nwritten < 0 && errno == EINTR);
timeout_end();
if (expected_ret < 0) {
if (nwritten != -1) {
fprintf(stderr, "bogus send(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 send(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, int flags)
{
uint8_t byte;
ssize_t nread;
timeout_begin(TIMEOUT);
do {
nread = recv(fd, &byte, sizeof(byte), flags);
timeout_check("read");
} while (nread < 0 && errno == EINTR);
timeout_end();
if (expected_ret < 0) {
if (nread != -1) {
fprintf(stderr, "bogus recv(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 recv(2) return value %zd\n", nread);
exit(EXIT_FAILURE);
}
if (byte != 'A') {
fprintf(stderr, "unexpected byte read %c\n", byte);
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
tools/testing/vsock/util.h
View File

@ -36,6 +36,8 @@ 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, int flags);
void recv_byte(int fd, int expected_ret, int flags);
void run_tests(const struct test_case *test_cases,
const struct test_opts *opts);