--- /dev/null
+/*
+ * Copyright 6WIND S.A., 2014
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version. See the COPYING file in the
+ * top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/cutils.h"
+
+#include "ivshmem-server.h"
+
+#define IVSHMEM_SERVER_DEFAULT_VERBOSE 0
+#define IVSHMEM_SERVER_DEFAULT_FOREGROUND 0
+#define IVSHMEM_SERVER_DEFAULT_PID_FILE "/var/run/ivshmem-server.pid"
+#define IVSHMEM_SERVER_DEFAULT_UNIX_SOCK_PATH "/tmp/ivshmem_socket"
+#define IVSHMEM_SERVER_DEFAULT_SHM_PATH "ivshmem"
+#define IVSHMEM_SERVER_DEFAULT_SHM_SIZE (4*1024*1024)
+#define IVSHMEM_SERVER_DEFAULT_N_VECTORS 1
+
+/* used to quit on signal SIGTERM */
+static int ivshmem_server_quit;
+
+/* arguments given by the user */
+typedef struct IvshmemServerArgs {
+ bool verbose;
+ bool foreground;
+ const char *pid_file;
+ const char *unix_socket_path;
+ const char *shm_path;
+ bool use_shm_open;
+ uint64_t shm_size;
+ unsigned n_vectors;
+} IvshmemServerArgs;
+
+static void
+ivshmem_server_usage(const char *progname)
+{
+ printf("Usage: %s [OPTION]...\n"
+ " -h: show this help\n"
+ " -v: verbose mode\n"
+ " -F: foreground mode (default is to daemonize)\n"
+ " -p <pid-file>: path to the PID file (used in daemon mode only)\n"
+ " default " IVSHMEM_SERVER_DEFAULT_PID_FILE "\n"
+ " -S <unix-socket-path>: path to the unix socket to listen to\n"
+ " default " IVSHMEM_SERVER_DEFAULT_UNIX_SOCK_PATH "\n"
+ " -M <shm-name>: POSIX shared memory object to use\n"
+ " default " IVSHMEM_SERVER_DEFAULT_SHM_PATH "\n"
+ " -m <dir-name>: where to create shared memory\n"
+ " -l <size>: size of shared memory in bytes\n"
+ " suffixes K, M and G can be used, e.g. 1K means 1024\n"
+ " default %u\n"
+ " -n <nvectors>: number of vectors\n"
+ " default %u\n",
+ progname, IVSHMEM_SERVER_DEFAULT_SHM_SIZE,
+ IVSHMEM_SERVER_DEFAULT_N_VECTORS);
+}
+
+static void
+ivshmem_server_help(const char *progname)
+{
+ fprintf(stderr, "Try '%s -h' for more information.\n", progname);
+}
+
+/* parse the program arguments, exit on error */
+static void
+ivshmem_server_parse_args(IvshmemServerArgs *args, int argc, char *argv[])
+{
+ int c;
+ unsigned long long v;
+ Error *err = NULL;
+
+ while ((c = getopt(argc, argv, "hvFp:S:m:M:l:n:")) != -1) {
+
+ switch (c) {
+ case 'h': /* help */
+ ivshmem_server_usage(argv[0]);
+ exit(0);
+ break;
+
+ case 'v': /* verbose */
+ args->verbose = 1;
+ break;
+
+ case 'F': /* foreground */
+ args->foreground = 1;
+ break;
+
+ case 'p': /* pid file */
+ args->pid_file = optarg;
+ break;
+
+ case 'S': /* unix socket path */
+ args->unix_socket_path = optarg;
+ break;
+
+ case 'M': /* shm name */
+ case 'm': /* dir name */
+ args->shm_path = optarg;
+ args->use_shm_open = c == 'M';
+ break;
+
+ case 'l': /* shm size */
+ parse_option_size("shm_size", optarg, &args->shm_size, &err);
+ if (err) {
+ error_report_err(err);
+ ivshmem_server_help(argv[0]);
+ exit(1);
+ }
+ break;
+
+ case 'n': /* number of vectors */
+ if (parse_uint_full(optarg, &v, 0) < 0) {
+ fprintf(stderr, "cannot parse n_vectors\n");
+ ivshmem_server_help(argv[0]);
+ exit(1);
+ }
+ args->n_vectors = v;
+ break;
+
+ default:
+ ivshmem_server_usage(argv[0]);
+ exit(1);
+ break;
+ }
+ }
+
+ if (args->n_vectors > IVSHMEM_SERVER_MAX_VECTORS) {
+ fprintf(stderr, "too many requested vectors (max is %d)\n",
+ IVSHMEM_SERVER_MAX_VECTORS);
+ ivshmem_server_help(argv[0]);
+ exit(1);
+ }
+
+ if (args->verbose == 1 && args->foreground == 0) {
+ fprintf(stderr, "cannot use verbose in daemon mode\n");
+ ivshmem_server_help(argv[0]);
+ exit(1);
+ }
+}
+
+/* wait for events on listening server unix socket and connected client
+ * sockets */
+static int
+ivshmem_server_poll_events(IvshmemServer *server)
+{
+ fd_set fds;
+ int ret = 0, maxfd;
+
+ while (!ivshmem_server_quit) {
+
+ FD_ZERO(&fds);
+ maxfd = 0;
+ ivshmem_server_get_fds(server, &fds, &maxfd);
+
+ ret = select(maxfd, &fds, NULL, NULL, NULL);
+
+ if (ret < 0) {
+ if (errno == EINTR) {
+ continue;
+ }
+
+ fprintf(stderr, "select error: %s\n", strerror(errno));
+ break;
+ }
+ if (ret == 0) {
+ continue;
+ }
+
+ if (ivshmem_server_handle_fds(server, &fds, maxfd) < 0) {
+ fprintf(stderr, "ivshmem_server_handle_fds() failed\n");
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static void
+ivshmem_server_quit_cb(int signum)
+{
+ ivshmem_server_quit = 1;
+}
+
+int
+main(int argc, char *argv[])
+{
+ IvshmemServer server;
+ struct sigaction sa, sa_quit;
+ IvshmemServerArgs args = {
+ .verbose = IVSHMEM_SERVER_DEFAULT_VERBOSE,
+ .foreground = IVSHMEM_SERVER_DEFAULT_FOREGROUND,
+ .pid_file = IVSHMEM_SERVER_DEFAULT_PID_FILE,
+ .unix_socket_path = IVSHMEM_SERVER_DEFAULT_UNIX_SOCK_PATH,
+ .shm_path = IVSHMEM_SERVER_DEFAULT_SHM_PATH,
+ .use_shm_open = true,
+ .shm_size = IVSHMEM_SERVER_DEFAULT_SHM_SIZE,
+ .n_vectors = IVSHMEM_SERVER_DEFAULT_N_VECTORS,
+ };
+ int ret = 1;
+
+ /*
+ * Do not remove this notice without adding proper error handling!
+ * Start with handling ivshmem_server_send_one_msg() failure.
+ */
+ printf("*** Example code, do not use in production ***\n");
+
+ /* parse arguments, will exit on error */
+ ivshmem_server_parse_args(&args, argc, argv);
+
+ /* Ignore SIGPIPE, see this link for more info:
+ * http://www.mail-archive.com/libevent-users@monkey.org/msg01606.html */
+ sa.sa_handler = SIG_IGN;
+ sa.sa_flags = 0;
+ if (sigemptyset(&sa.sa_mask) == -1 ||
+ sigaction(SIGPIPE, &sa, 0) == -1) {
+ perror("failed to ignore SIGPIPE; sigaction");
+ goto err;
+ }
+
+ sa_quit.sa_handler = ivshmem_server_quit_cb;
+ sa_quit.sa_flags = 0;
+ if (sigemptyset(&sa_quit.sa_mask) == -1 ||
+ sigaction(SIGTERM, &sa_quit, 0) == -1) {
+ perror("failed to add SIGTERM handler; sigaction");
+ goto err;
+ }
+
+ /* init the ivshms structure */
+ if (ivshmem_server_init(&server, args.unix_socket_path,
+ args.shm_path, args.use_shm_open,
+ args.shm_size, args.n_vectors, args.verbose) < 0) {
+ fprintf(stderr, "cannot init server\n");
+ goto err;
+ }
+
+ /* start the ivshmem server (open shm & unix socket) */
+ if (ivshmem_server_start(&server) < 0) {
+ fprintf(stderr, "cannot bind\n");
+ goto err;
+ }
+
+ /* daemonize if asked to */
+ if (!args.foreground) {
+ FILE *fp;
+
+ if (qemu_daemon(1, 1) < 0) {
+ fprintf(stderr, "cannot daemonize: %s\n", strerror(errno));
+ goto err_close;
+ }
+
+ /* write pid file */
+ fp = fopen(args.pid_file, "w");
+ if (fp == NULL) {
+ fprintf(stderr, "cannot write pid file: %s\n", strerror(errno));
+ goto err_close;
+ }
+
+ fprintf(fp, "%d\n", (int) getpid());
+ fclose(fp);
+ }
+
+ ivshmem_server_poll_events(&server);
+ fprintf(stdout, "server disconnected\n");
+ ret = 0;
+
+err_close:
+ ivshmem_server_close(&server);
+err:
+ return ret;
+}
Code Review / kvmfornfv.git / blobdiff