398 lines
8.0 KiB
C
398 lines
8.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vsock test utilities
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*
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* Copyright (C) 2017 Red Hat, Inc.
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*
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* Author: Stefan Hajnoczi <stefanha@redhat.com>
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <unistd.h>
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#include <assert.h>
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#include <sys/epoll.h>
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#include "timeout.h"
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#include "control.h"
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#include "util.h"
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/* Install signal handlers */
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void init_signals(void)
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{
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struct sigaction act = {
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.sa_handler = sigalrm,
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};
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sigaction(SIGALRM, &act, NULL);
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signal(SIGPIPE, SIG_IGN);
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}
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/* Parse a CID in string representation */
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unsigned int parse_cid(const char *str)
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{
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char *endptr = NULL;
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unsigned long n;
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errno = 0;
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n = strtoul(str, &endptr, 10);
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if (errno || *endptr != '\0') {
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fprintf(stderr, "malformed CID \"%s\"\n", str);
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exit(EXIT_FAILURE);
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}
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return n;
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}
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/* Wait for the remote to close the connection */
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void vsock_wait_remote_close(int fd)
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{
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struct epoll_event ev;
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int epollfd, nfds;
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epollfd = epoll_create1(0);
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if (epollfd == -1) {
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perror("epoll_create1");
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exit(EXIT_FAILURE);
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}
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ev.events = EPOLLRDHUP | EPOLLHUP;
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ev.data.fd = fd;
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if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev) == -1) {
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perror("epoll_ctl");
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exit(EXIT_FAILURE);
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}
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nfds = epoll_wait(epollfd, &ev, 1, TIMEOUT * 1000);
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if (nfds == -1) {
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perror("epoll_wait");
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exit(EXIT_FAILURE);
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}
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if (nfds == 0) {
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fprintf(stderr, "epoll_wait timed out\n");
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exit(EXIT_FAILURE);
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}
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assert(nfds == 1);
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assert(ev.events & (EPOLLRDHUP | EPOLLHUP));
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assert(ev.data.fd == fd);
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close(epollfd);
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}
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/* Connect to <cid, port> and return the file descriptor. */
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static int vsock_connect(unsigned int cid, unsigned int port, int type)
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{
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union {
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struct sockaddr sa;
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struct sockaddr_vm svm;
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} addr = {
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.svm = {
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.svm_family = AF_VSOCK,
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.svm_port = port,
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.svm_cid = cid,
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},
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};
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int ret;
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int fd;
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control_expectln("LISTENING");
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fd = socket(AF_VSOCK, type, 0);
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timeout_begin(TIMEOUT);
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do {
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ret = connect(fd, &addr.sa, sizeof(addr.svm));
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timeout_check("connect");
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} while (ret < 0 && errno == EINTR);
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timeout_end();
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if (ret < 0) {
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int old_errno = errno;
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close(fd);
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fd = -1;
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errno = old_errno;
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}
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return fd;
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}
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int vsock_stream_connect(unsigned int cid, unsigned int port)
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{
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return vsock_connect(cid, port, SOCK_STREAM);
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}
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int vsock_seqpacket_connect(unsigned int cid, unsigned int port)
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{
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return vsock_connect(cid, port, SOCK_SEQPACKET);
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}
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/* Listen on <cid, port> and return the first incoming connection. The remote
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* address is stored to clientaddrp. clientaddrp may be NULL.
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*/
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static int vsock_accept(unsigned int cid, unsigned int port,
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struct sockaddr_vm *clientaddrp, int type)
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{
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union {
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struct sockaddr sa;
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struct sockaddr_vm svm;
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} addr = {
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.svm = {
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.svm_family = AF_VSOCK,
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.svm_port = port,
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.svm_cid = cid,
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},
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};
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union {
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struct sockaddr sa;
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struct sockaddr_vm svm;
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} clientaddr;
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socklen_t clientaddr_len = sizeof(clientaddr.svm);
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int fd;
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int client_fd;
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int old_errno;
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fd = socket(AF_VSOCK, type, 0);
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if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
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perror("bind");
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exit(EXIT_FAILURE);
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}
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if (listen(fd, 1) < 0) {
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perror("listen");
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exit(EXIT_FAILURE);
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}
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control_writeln("LISTENING");
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timeout_begin(TIMEOUT);
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do {
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client_fd = accept(fd, &clientaddr.sa, &clientaddr_len);
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timeout_check("accept");
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} while (client_fd < 0 && errno == EINTR);
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timeout_end();
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old_errno = errno;
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close(fd);
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errno = old_errno;
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if (client_fd < 0)
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return client_fd;
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if (clientaddr_len != sizeof(clientaddr.svm)) {
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fprintf(stderr, "unexpected addrlen from accept(2), %zu\n",
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(size_t)clientaddr_len);
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exit(EXIT_FAILURE);
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}
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if (clientaddr.sa.sa_family != AF_VSOCK) {
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fprintf(stderr, "expected AF_VSOCK from accept(2), got %d\n",
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clientaddr.sa.sa_family);
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exit(EXIT_FAILURE);
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}
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if (clientaddrp)
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*clientaddrp = clientaddr.svm;
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return client_fd;
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}
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int vsock_stream_accept(unsigned int cid, unsigned int port,
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struct sockaddr_vm *clientaddrp)
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{
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return vsock_accept(cid, port, clientaddrp, SOCK_STREAM);
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}
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int vsock_seqpacket_accept(unsigned int cid, unsigned int port,
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struct sockaddr_vm *clientaddrp)
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{
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return vsock_accept(cid, port, clientaddrp, SOCK_SEQPACKET);
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}
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/* Transmit one byte and check the return value.
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*
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* expected_ret:
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* <0 Negative errno (for testing errors)
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* 0 End-of-file
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* 1 Success
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*/
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void send_byte(int fd, int expected_ret, int flags)
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{
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const uint8_t byte = 'A';
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ssize_t nwritten;
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timeout_begin(TIMEOUT);
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do {
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nwritten = send(fd, &byte, sizeof(byte), flags);
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timeout_check("write");
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} while (nwritten < 0 && errno == EINTR);
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timeout_end();
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if (expected_ret < 0) {
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if (nwritten != -1) {
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fprintf(stderr, "bogus send(2) return value %zd\n",
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nwritten);
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exit(EXIT_FAILURE);
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}
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if (errno != -expected_ret) {
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perror("write");
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exit(EXIT_FAILURE);
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}
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return;
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}
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if (nwritten < 0) {
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perror("write");
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exit(EXIT_FAILURE);
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}
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if (nwritten == 0) {
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if (expected_ret == 0)
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return;
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fprintf(stderr, "unexpected EOF while sending byte\n");
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exit(EXIT_FAILURE);
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}
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if (nwritten != sizeof(byte)) {
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fprintf(stderr, "bogus send(2) return value %zd\n", nwritten);
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exit(EXIT_FAILURE);
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}
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}
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/* Receive one byte and check the return value.
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*
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* expected_ret:
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* <0 Negative errno (for testing errors)
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* 0 End-of-file
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* 1 Success
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*/
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void recv_byte(int fd, int expected_ret, int flags)
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{
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uint8_t byte;
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ssize_t nread;
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timeout_begin(TIMEOUT);
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do {
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nread = recv(fd, &byte, sizeof(byte), flags);
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timeout_check("read");
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} while (nread < 0 && errno == EINTR);
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timeout_end();
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if (expected_ret < 0) {
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if (nread != -1) {
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fprintf(stderr, "bogus recv(2) return value %zd\n",
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nread);
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exit(EXIT_FAILURE);
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}
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if (errno != -expected_ret) {
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perror("read");
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exit(EXIT_FAILURE);
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}
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return;
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}
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if (nread < 0) {
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perror("read");
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exit(EXIT_FAILURE);
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}
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if (nread == 0) {
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if (expected_ret == 0)
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return;
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fprintf(stderr, "unexpected EOF while receiving byte\n");
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exit(EXIT_FAILURE);
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}
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if (nread != sizeof(byte)) {
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fprintf(stderr, "bogus recv(2) return value %zd\n", nread);
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exit(EXIT_FAILURE);
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}
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if (byte != 'A') {
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fprintf(stderr, "unexpected byte read %c\n", byte);
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exit(EXIT_FAILURE);
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}
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}
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/* Run test cases. The program terminates if a failure occurs. */
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void run_tests(const struct test_case *test_cases,
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const struct test_opts *opts)
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{
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int i;
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for (i = 0; test_cases[i].name; i++) {
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void (*run)(const struct test_opts *opts);
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char *line;
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printf("%d - %s...", i, test_cases[i].name);
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fflush(stdout);
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/* Full barrier before executing the next test. This
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* ensures that client and server are executing the
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* same test case. In particular, it means whoever is
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* faster will not see the peer still executing the
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* last test. This is important because port numbers
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* can be used by multiple test cases.
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*/
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if (test_cases[i].skip)
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control_writeln("SKIP");
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else
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control_writeln("NEXT");
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line = control_readln();
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if (control_cmpln(line, "SKIP", false) || test_cases[i].skip) {
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printf("skipped\n");
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free(line);
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continue;
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}
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control_cmpln(line, "NEXT", true);
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free(line);
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if (opts->mode == TEST_MODE_CLIENT)
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run = test_cases[i].run_client;
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else
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run = test_cases[i].run_server;
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if (run)
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run(opts);
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printf("ok\n");
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}
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}
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void list_tests(const struct test_case *test_cases)
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{
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int i;
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printf("ID\tTest name\n");
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for (i = 0; test_cases[i].name; i++)
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printf("%d\t%s\n", i, test_cases[i].name);
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exit(EXIT_FAILURE);
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}
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void skip_test(struct test_case *test_cases, size_t test_cases_len,
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const char *test_id_str)
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{
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unsigned long test_id;
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char *endptr = NULL;
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errno = 0;
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test_id = strtoul(test_id_str, &endptr, 10);
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if (errno || *endptr != '\0') {
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fprintf(stderr, "malformed test ID \"%s\"\n", test_id_str);
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exit(EXIT_FAILURE);
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}
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if (test_id >= test_cases_len) {
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fprintf(stderr, "test ID (%lu) larger than the max allowed (%lu)\n",
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test_id, test_cases_len - 1);
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exit(EXIT_FAILURE);
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}
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test_cases[test_id].skip = true;
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}
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