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authorStefan Hajnoczi <stefanha@redhat.com>2017-10-05 16:46:54 -0400
committerDavid S. Miller <davem@davemloft.net>2017-10-05 18:44:17 -0700
commit0b02503384301e4c2db13f1045a1ddbaca2ba0ce (patch)
tree88a8efdc3dcba52ab1d0e379a709d4043acbc6c7 /tools/testing/vsock/vsock_diag_test.c
parentVSOCK: add sock_diag interface (diff)
downloadlinux-dev-0b02503384301e4c2db13f1045a1ddbaca2ba0ce.tar.xz
linux-dev-0b02503384301e4c2db13f1045a1ddbaca2ba0ce.zip
VSOCK: add tools/testing/vsock/vsock_diag_test
This patch adds tests for the vsock_diag.ko module. These tests are not self-tests because they require manual set up of a KVM or VMware guest. Please see tools/testing/vsock/README for instructions. The control.h and timeout.h infrastructure can be used for additional AF_VSOCK tests in the future. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--tools/testing/vsock/vsock_diag_test.c681
1 files changed, 681 insertions, 0 deletions
diff --git a/tools/testing/vsock/vsock_diag_test.c b/tools/testing/vsock/vsock_diag_test.c
new file mode 100644
index 000000000000..e896a4af52f4
--- /dev/null
+++ b/tools/testing/vsock/vsock_diag_test.c
@@ -0,0 +1,681 @@
+/*
+ * vsock_diag_test - vsock_diag.ko test suite
+ *
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * Author: Stefan Hajnoczi <stefanha@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <getopt.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <linux/list.h>
+#include <linux/net.h>
+#include <linux/netlink.h>
+#include <linux/sock_diag.h>
+#include <netinet/tcp.h>
+
+#include "../../../include/uapi/linux/vm_sockets.h"
+#include "../../../include/uapi/linux/vm_sockets_diag.h"
+
+#include "timeout.h"
+#include "control.h"
+
+enum test_mode {
+ TEST_MODE_UNSET,
+ TEST_MODE_CLIENT,
+ TEST_MODE_SERVER
+};
+
+/* Per-socket status */
+struct vsock_stat {
+ struct list_head list;
+ struct vsock_diag_msg msg;
+};
+
+static const char *sock_type_str(int type)
+{
+ switch (type) {
+ case SOCK_DGRAM:
+ return "DGRAM";
+ case SOCK_STREAM:
+ return "STREAM";
+ default:
+ return "INVALID TYPE";
+ }
+}
+
+static const char *sock_state_str(int state)
+{
+ switch (state) {
+ case TCP_CLOSE:
+ return "UNCONNECTED";
+ case TCP_SYN_SENT:
+ return "CONNECTING";
+ case TCP_ESTABLISHED:
+ return "CONNECTED";
+ case TCP_CLOSING:
+ return "DISCONNECTING";
+ case TCP_LISTEN:
+ return "LISTEN";
+ default:
+ return "INVALID STATE";
+ }
+}
+
+static const char *sock_shutdown_str(int shutdown)
+{
+ switch (shutdown) {
+ case 1:
+ return "RCV_SHUTDOWN";
+ case 2:
+ return "SEND_SHUTDOWN";
+ case 3:
+ return "RCV_SHUTDOWN | SEND_SHUTDOWN";
+ default:
+ return "0";
+ }
+}
+
+static void print_vsock_addr(FILE *fp, unsigned int cid, unsigned int port)
+{
+ if (cid == VMADDR_CID_ANY)
+ fprintf(fp, "*:");
+ else
+ fprintf(fp, "%u:", cid);
+
+ if (port == VMADDR_PORT_ANY)
+ fprintf(fp, "*");
+ else
+ fprintf(fp, "%u", port);
+}
+
+static void print_vsock_stat(FILE *fp, struct vsock_stat *st)
+{
+ print_vsock_addr(fp, st->msg.vdiag_src_cid, st->msg.vdiag_src_port);
+ fprintf(fp, " ");
+ print_vsock_addr(fp, st->msg.vdiag_dst_cid, st->msg.vdiag_dst_port);
+ fprintf(fp, " %s %s %s %u\n",
+ sock_type_str(st->msg.vdiag_type),
+ sock_state_str(st->msg.vdiag_state),
+ sock_shutdown_str(st->msg.vdiag_shutdown),
+ st->msg.vdiag_ino);
+}
+
+static void print_vsock_stats(FILE *fp, struct list_head *head)
+{
+ struct vsock_stat *st;
+
+ list_for_each_entry(st, head, list)
+ print_vsock_stat(fp, st);
+}
+
+static struct vsock_stat *find_vsock_stat(struct list_head *head, int fd)
+{
+ struct vsock_stat *st;
+ struct stat stat;
+
+ if (fstat(fd, &stat) < 0) {
+ perror("fstat");
+ exit(EXIT_FAILURE);
+ }
+
+ list_for_each_entry(st, head, list)
+ if (st->msg.vdiag_ino == stat.st_ino)
+ return st;
+
+ fprintf(stderr, "cannot find fd %d\n", fd);
+ exit(EXIT_FAILURE);
+}
+
+static void check_no_sockets(struct list_head *head)
+{
+ if (!list_empty(head)) {
+ fprintf(stderr, "expected no sockets\n");
+ print_vsock_stats(stderr, head);
+ exit(1);
+ }
+}
+
+static void check_num_sockets(struct list_head *head, int expected)
+{
+ struct list_head *node;
+ int n = 0;
+
+ list_for_each(node, head)
+ n++;
+
+ if (n != expected) {
+ fprintf(stderr, "expected %d sockets, found %d\n",
+ expected, n);
+ print_vsock_stats(stderr, head);
+ exit(EXIT_FAILURE);
+ }
+}
+
+static void check_socket_state(struct vsock_stat *st, __u8 state)
+{
+ if (st->msg.vdiag_state != state) {
+ fprintf(stderr, "expected socket state %#x, got %#x\n",
+ state, st->msg.vdiag_state);
+ exit(EXIT_FAILURE);
+ }
+}
+
+static void send_req(int fd)
+{
+ struct sockaddr_nl nladdr = {
+ .nl_family = AF_NETLINK,
+ };
+ struct {
+ struct nlmsghdr nlh;
+ struct vsock_diag_req vreq;
+ } req = {
+ .nlh = {
+ .nlmsg_len = sizeof(req),
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP,
+ },
+ .vreq = {
+ .sdiag_family = AF_VSOCK,
+ .vdiag_states = ~(__u32)0,
+ },
+ };
+ struct iovec iov = {
+ .iov_base = &req,
+ .iov_len = sizeof(req),
+ };
+ struct msghdr msg = {
+ .msg_name = &nladdr,
+ .msg_namelen = sizeof(nladdr),
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ };
+
+ for (;;) {
+ if (sendmsg(fd, &msg, 0) < 0) {
+ if (errno == EINTR)
+ continue;
+
+ perror("sendmsg");
+ exit(EXIT_FAILURE);
+ }
+
+ return;
+ }
+}
+
+static ssize_t recv_resp(int fd, void *buf, size_t len)
+{
+ struct sockaddr_nl nladdr = {
+ .nl_family = AF_NETLINK,
+ };
+ struct iovec iov = {
+ .iov_base = buf,
+ .iov_len = len,
+ };
+ struct msghdr msg = {
+ .msg_name = &nladdr,
+ .msg_namelen = sizeof(nladdr),
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ };
+ ssize_t ret;
+
+ do {
+ ret = recvmsg(fd, &msg, 0);
+ } while (ret < 0 && errno == EINTR);
+
+ if (ret < 0) {
+ perror("recvmsg");
+ exit(EXIT_FAILURE);
+ }
+
+ return ret;
+}
+
+static void add_vsock_stat(struct list_head *sockets,
+ const struct vsock_diag_msg *resp)
+{
+ struct vsock_stat *st;
+
+ st = malloc(sizeof(*st));
+ if (!st) {
+ perror("malloc");
+ exit(EXIT_FAILURE);
+ }
+
+ st->msg = *resp;
+ list_add_tail(&st->list, sockets);
+}
+
+/*
+ * Read vsock stats into a list.
+ */
+static void read_vsock_stat(struct list_head *sockets)
+{
+ long buf[8192 / sizeof(long)];
+ int fd;
+
+ fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG);
+ if (fd < 0) {
+ perror("socket");
+ exit(EXIT_FAILURE);
+ }
+
+ send_req(fd);
+
+ for (;;) {
+ const struct nlmsghdr *h;
+ ssize_t ret;
+
+ ret = recv_resp(fd, buf, sizeof(buf));
+ if (ret == 0)
+ goto done;
+ if (ret < sizeof(*h)) {
+ fprintf(stderr, "short read of %zd bytes\n", ret);
+ exit(EXIT_FAILURE);
+ }
+
+ h = (struct nlmsghdr *)buf;
+
+ while (NLMSG_OK(h, ret)) {
+ if (h->nlmsg_type == NLMSG_DONE)
+ goto done;
+
+ if (h->nlmsg_type == NLMSG_ERROR) {
+ const struct nlmsgerr *err = NLMSG_DATA(h);
+
+ if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
+ fprintf(stderr, "NLMSG_ERROR\n");
+ else {
+ errno = -err->error;
+ perror("NLMSG_ERROR");
+ }
+
+ exit(EXIT_FAILURE);
+ }
+
+ if (h->nlmsg_type != SOCK_DIAG_BY_FAMILY) {
+ fprintf(stderr, "unexpected nlmsg_type %#x\n",
+ h->nlmsg_type);
+ exit(EXIT_FAILURE);
+ }
+ if (h->nlmsg_len <
+ NLMSG_LENGTH(sizeof(struct vsock_diag_msg))) {
+ fprintf(stderr, "short vsock_diag_msg\n");
+ exit(EXIT_FAILURE);
+ }
+
+ add_vsock_stat(sockets, NLMSG_DATA(h));
+
+ h = NLMSG_NEXT(h, ret);
+ }
+ }
+
+done:
+ close(fd);
+}
+
+static void free_sock_stat(struct list_head *sockets)
+{
+ struct vsock_stat *st;
+ struct vsock_stat *next;
+
+ list_for_each_entry_safe(st, next, sockets, list)
+ free(st);
+}
+
+static void test_no_sockets(unsigned int peer_cid)
+{
+ LIST_HEAD(sockets);
+
+ read_vsock_stat(&sockets);
+
+ check_no_sockets(&sockets);
+
+ free_sock_stat(&sockets);
+}
+
+static void test_listen_socket_server(unsigned int peer_cid)
+{
+ union {
+ struct sockaddr sa;
+ struct sockaddr_vm svm;
+ } addr = {
+ .svm = {
+ .svm_family = AF_VSOCK,
+ .svm_port = 1234,
+ .svm_cid = VMADDR_CID_ANY,
+ },
+ };
+ LIST_HEAD(sockets);
+ struct vsock_stat *st;
+ int fd;
+
+ fd = socket(AF_VSOCK, SOCK_STREAM, 0);
+
+ if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
+ perror("bind");
+ exit(EXIT_FAILURE);
+ }
+
+ if (listen(fd, 1) < 0) {
+ perror("listen");
+ exit(EXIT_FAILURE);
+ }
+
+ read_vsock_stat(&sockets);
+
+ check_num_sockets(&sockets, 1);
+ st = find_vsock_stat(&sockets, fd);
+ check_socket_state(st, TCP_LISTEN);
+
+ close(fd);
+ free_sock_stat(&sockets);
+}
+
+static void test_connect_client(unsigned int peer_cid)
+{
+ union {
+ struct sockaddr sa;
+ struct sockaddr_vm svm;
+ } addr = {
+ .svm = {
+ .svm_family = AF_VSOCK,
+ .svm_port = 1234,
+ .svm_cid = peer_cid,
+ },
+ };
+ int fd;
+ int ret;
+ LIST_HEAD(sockets);
+ struct vsock_stat *st;
+
+ control_expectln("LISTENING");
+
+ fd = socket(AF_VSOCK, SOCK_STREAM, 0);
+
+ timeout_begin(TIMEOUT);
+ do {
+ ret = connect(fd, &addr.sa, sizeof(addr.svm));
+ timeout_check("connect");
+ } while (ret < 0 && errno == EINTR);
+ timeout_end();
+
+ if (ret < 0) {
+ perror("connect");
+ exit(EXIT_FAILURE);
+ }
+
+ read_vsock_stat(&sockets);
+
+ check_num_sockets(&sockets, 1);
+ st = find_vsock_stat(&sockets, fd);
+ check_socket_state(st, TCP_ESTABLISHED);
+
+ control_expectln("DONE");
+ control_writeln("DONE");
+
+ close(fd);
+ free_sock_stat(&sockets);
+}
+
+static void test_connect_server(unsigned int peer_cid)
+{
+ union {
+ struct sockaddr sa;
+ struct sockaddr_vm svm;
+ } addr = {
+ .svm = {
+ .svm_family = AF_VSOCK,
+ .svm_port = 1234,
+ .svm_cid = VMADDR_CID_ANY,
+ },
+ };
+ union {
+ struct sockaddr sa;
+ struct sockaddr_vm svm;
+ } clientaddr;
+ socklen_t clientaddr_len = sizeof(clientaddr.svm);
+ LIST_HEAD(sockets);
+ struct vsock_stat *st;
+ int fd;
+ int client_fd;
+
+ fd = socket(AF_VSOCK, SOCK_STREAM, 0);
+
+ if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
+ perror("bind");
+ exit(EXIT_FAILURE);
+ }
+
+ if (listen(fd, 1) < 0) {
+ perror("listen");
+ exit(EXIT_FAILURE);
+ }
+
+ control_writeln("LISTENING");
+
+ timeout_begin(TIMEOUT);
+ do {
+ client_fd = accept(fd, &clientaddr.sa, &clientaddr_len);
+ timeout_check("accept");
+ } while (client_fd < 0 && errno == EINTR);
+ timeout_end();
+
+ if (client_fd < 0) {
+ perror("accept");
+ exit(EXIT_FAILURE);
+ }
+ if (clientaddr.sa.sa_family != AF_VSOCK) {
+ fprintf(stderr, "expected AF_VSOCK from accept(2), got %d\n",
+ clientaddr.sa.sa_family);
+ exit(EXIT_FAILURE);
+ }
+ if (clientaddr.svm.svm_cid != peer_cid) {
+ fprintf(stderr, "expected peer CID %u from accept(2), got %u\n",
+ peer_cid, clientaddr.svm.svm_cid);
+ exit(EXIT_FAILURE);
+ }
+
+ read_vsock_stat(&sockets);
+
+ check_num_sockets(&sockets, 2);
+ find_vsock_stat(&sockets, fd);
+ st = find_vsock_stat(&sockets, client_fd);
+ check_socket_state(st, TCP_ESTABLISHED);
+
+ control_writeln("DONE");
+ control_expectln("DONE");
+
+ close(client_fd);
+ close(fd);
+ free_sock_stat(&sockets);
+}
+
+static struct {
+ const char *name;
+ void (*run_client)(unsigned int peer_cid);
+ void (*run_server)(unsigned int peer_cid);
+} test_cases[] = {
+ {
+ .name = "No sockets",
+ .run_server = test_no_sockets,
+ },
+ {
+ .name = "Listen socket",
+ .run_server = test_listen_socket_server,
+ },
+ {
+ .name = "Connect",
+ .run_client = test_connect_client,
+ .run_server = test_connect_server,
+ },
+ {},
+};
+
+static void init_signals(void)
+{
+ struct sigaction act = {
+ .sa_handler = sigalrm,
+ };
+
+ sigaction(SIGALRM, &act, NULL);
+ signal(SIGPIPE, SIG_IGN);
+}
+
+static unsigned int parse_cid(const char *str)
+{
+ char *endptr = NULL;
+ unsigned long int n;
+
+ errno = 0;
+ n = strtoul(str, &endptr, 10);
+ if (errno || *endptr != '\0') {
+ fprintf(stderr, "malformed CID \"%s\"\n", str);
+ exit(EXIT_FAILURE);
+ }
+ return n;
+}
+
+static const char optstring[] = "";
+static const struct option longopts[] = {
+ {
+ .name = "control-host",
+ .has_arg = required_argument,
+ .val = 'H',
+ },
+ {
+ .name = "control-port",
+ .has_arg = required_argument,
+ .val = 'P',
+ },
+ {
+ .name = "mode",
+ .has_arg = required_argument,
+ .val = 'm',
+ },
+ {
+ .name = "peer-cid",
+ .has_arg = required_argument,
+ .val = 'p',
+ },
+ {
+ .name = "help",
+ .has_arg = no_argument,
+ .val = '?',
+ },
+ {},
+};
+
+static void usage(void)
+{
+ fprintf(stderr, "Usage: vsock_diag_test [--help] [--control-host=<host>] --control-port=<port> --mode=client|server --peer-cid=<cid>\n"
+ "\n"
+ " Server: vsock_diag_test --control-port=1234 --mode=server --peer-cid=3\n"
+ " Client: vsock_diag_test --control-host=192.168.0.1 --control-port=1234 --mode=client --peer-cid=2\n"
+ "\n"
+ "Run vsock_diag.ko tests. Must be launched in both\n"
+ "guest and host. One side must use --mode=client and\n"
+ "the other side must use --mode=server.\n"
+ "\n"
+ "A TCP control socket connection is used to coordinate tests\n"
+ "between the client and the server. The server requires a\n"
+ "listen address and the client requires an address to\n"
+ "connect to.\n"
+ "\n"
+ "The CID of the other side must be given with --peer-cid=<cid>.\n");
+ exit(EXIT_FAILURE);
+}
+
+int main(int argc, char **argv)
+{
+ const char *control_host = NULL;
+ const char *control_port = NULL;
+ int mode = TEST_MODE_UNSET;
+ unsigned int peer_cid = VMADDR_CID_ANY;
+ int i;
+
+ init_signals();
+
+ for (;;) {
+ int opt = getopt_long(argc, argv, optstring, longopts, NULL);
+
+ if (opt == -1)
+ break;
+
+ switch (opt) {
+ case 'H':
+ control_host = optarg;
+ break;
+ case 'm':
+ if (strcmp(optarg, "client") == 0)
+ mode = TEST_MODE_CLIENT;
+ else if (strcmp(optarg, "server") == 0)
+ mode = TEST_MODE_SERVER;
+ else {
+ fprintf(stderr, "--mode must be \"client\" or \"server\"\n");
+ return EXIT_FAILURE;
+ }
+ break;
+ case 'p':
+ peer_cid = parse_cid(optarg);
+ break;
+ case 'P':
+ control_port = optarg;
+ break;
+ case '?':
+ default:
+ usage();
+ }
+ }
+
+ if (!control_port)
+ usage();
+ if (mode == TEST_MODE_UNSET)
+ usage();
+ if (peer_cid == VMADDR_CID_ANY)
+ usage();
+
+ if (!control_host) {
+ if (mode != TEST_MODE_SERVER)
+ usage();
+ control_host = "0.0.0.0";
+ }
+
+ control_init(control_host, control_port, mode == TEST_MODE_SERVER);
+
+ for (i = 0; test_cases[i].name; i++) {
+ void (*run)(unsigned int peer_cid);
+
+ printf("%s...", test_cases[i].name);
+ fflush(stdout);
+
+ if (mode == TEST_MODE_CLIENT)
+ run = test_cases[i].run_client;
+ else
+ run = test_cases[i].run_server;
+
+ if (run)
+ run(peer_cid);
+
+ printf("ok\n");
+ }
+
+ control_cleanup();
+ return EXIT_SUCCESS;
+}