chardev: add socket chardev support to chardev-add (qmp)
qemu_chr_open_socket is split into two functions. All initialization after creating the socket file handler is split away into the new qemu_chr_open_socket_fd function. chr->filename doesn't get filled from QemuOpts any more. Qemu gathers the information using getsockname and getnameinfo instead. This way it will also work correctly for file handles passed via file descriptor passing. Finally qmp_chardev_open_socket() is the actual qmp hotplug implementation which basically just calls socket_listen or socket_connect and the new qemu_chr_open_socket_fd function. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann
parent
88a946d32d
commit
f6bd5d6ec5
@ -3048,6 +3048,27 @@
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{ 'type': 'ChardevPort', 'data': { 'device' : 'str',
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'type' : 'ChardevPortKind'} }
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##
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# @ChardevSocket:
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#
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# Configuration info for socket chardevs.
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#
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# @addr: socket address to listen on (server=true)
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# or connect to (server=false)
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# @server: #optional create server socket (default: true)
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# @wait: #optional wait for connect (not used for server
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# sockets, default: false)
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# @nodelay: #optional set TCP_NODELAY socket option (default: false)
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# @telnet: #optional enable telnet protocol (default: false)
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#
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# Since: 1.4
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##
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{ 'type': 'ChardevSocket', 'data': { 'addr' : 'SocketAddress',
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'*server' : 'bool',
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'*wait' : 'bool',
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'*nodelay' : 'bool',
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'*telnet' : 'bool' } }
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##
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# @ChardevBackend:
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#
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@ -3057,9 +3078,10 @@
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##
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{ 'type': 'ChardevDummy', 'data': { } }
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{ 'union': 'ChardevBackend', 'data': { 'file' : 'ChardevFile',
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'port' : 'ChardevPort',
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'null' : 'ChardevDummy' } }
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{ 'union': 'ChardevBackend', 'data': { 'file' : 'ChardevFile',
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'port' : 'ChardevPort',
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'socket' : 'ChardevSocket',
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'null' : 'ChardevDummy' } }
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##
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# @ChardevReturn:
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166
qemu-char.c
166
qemu-char.c
@ -2438,10 +2438,88 @@ static void tcp_chr_close(CharDriverState *chr)
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qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
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}
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static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
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static CharDriverState *qemu_chr_open_socket_fd(int fd, bool do_nodelay,
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bool is_listen, bool is_telnet,
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bool is_waitconnect,
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Error **errp)
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{
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CharDriverState *chr = NULL;
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TCPCharDriver *s = NULL;
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char host[NI_MAXHOST], serv[NI_MAXSERV];
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const char *left = "", *right = "";
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struct sockaddr_storage ss;
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socklen_t ss_len = sizeof(ss);
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memset(&ss, 0, ss_len);
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if (getsockname(fd, (struct sockaddr *) &ss, &ss_len) != 0) {
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error_setg(errp, "getsockname: %s", strerror(errno));
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return NULL;
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}
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chr = g_malloc0(sizeof(CharDriverState));
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s = g_malloc0(sizeof(TCPCharDriver));
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s->connected = 0;
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s->fd = -1;
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s->listen_fd = -1;
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s->msgfd = -1;
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chr->filename = g_malloc(256);
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switch (ss.ss_family) {
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#ifndef _WIN32
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case AF_UNIX:
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s->is_unix = 1;
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snprintf(chr->filename, 256, "unix:%s%s",
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((struct sockaddr_un *)(&ss))->sun_path,
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is_listen ? ",server" : "");
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break;
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#endif
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case AF_INET6:
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left = "[";
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right = "]";
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/* fall through */
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case AF_INET:
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s->do_nodelay = do_nodelay;
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getnameinfo((struct sockaddr *) &ss, ss_len, host, sizeof(host),
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serv, sizeof(serv), NI_NUMERICHOST | NI_NUMERICSERV);
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snprintf(chr->filename, 256, "%s:%s:%s%s%s%s",
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is_telnet ? "telnet" : "tcp",
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left, host, right, serv,
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is_listen ? ",server" : "");
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break;
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}
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chr->opaque = s;
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chr->chr_write = tcp_chr_write;
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chr->chr_close = tcp_chr_close;
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chr->get_msgfd = tcp_get_msgfd;
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chr->chr_add_client = tcp_chr_add_client;
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if (is_listen) {
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s->listen_fd = fd;
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qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
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if (is_telnet) {
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s->do_telnetopt = 1;
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}
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} else {
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s->connected = 1;
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s->fd = fd;
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socket_set_nodelay(fd);
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tcp_chr_connect(chr);
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}
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if (is_listen && is_waitconnect) {
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printf("QEMU waiting for connection on: %s\n",
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chr->filename);
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tcp_chr_accept(chr);
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socket_set_nonblock(s->listen_fd);
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}
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return chr;
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}
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static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
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{
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CharDriverState *chr = NULL;
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Error *local_err = NULL;
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int fd = -1;
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int is_listen;
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@ -2458,9 +2536,6 @@ static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
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if (!is_listen)
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is_waitconnect = 0;
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chr = g_malloc0(sizeof(CharDriverState));
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s = g_malloc0(sizeof(TCPCharDriver));
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if (is_unix) {
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if (is_listen) {
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fd = unix_listen_opts(opts, &local_err);
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@ -2481,56 +2556,14 @@ static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
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if (!is_waitconnect)
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socket_set_nonblock(fd);
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s->connected = 0;
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s->fd = -1;
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s->listen_fd = -1;
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s->msgfd = -1;
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s->is_unix = is_unix;
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s->do_nodelay = do_nodelay && !is_unix;
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chr->opaque = s;
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chr->chr_write = tcp_chr_write;
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chr->chr_close = tcp_chr_close;
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chr->get_msgfd = tcp_get_msgfd;
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chr->chr_add_client = tcp_chr_add_client;
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if (is_listen) {
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s->listen_fd = fd;
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qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
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if (is_telnet)
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s->do_telnetopt = 1;
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} else {
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s->connected = 1;
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s->fd = fd;
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socket_set_nodelay(fd);
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tcp_chr_connect(chr);
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}
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/* for "info chardev" monitor command */
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chr->filename = g_malloc(256);
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if (is_unix) {
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snprintf(chr->filename, 256, "unix:%s%s",
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qemu_opt_get(opts, "path"),
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qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
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} else if (is_telnet) {
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snprintf(chr->filename, 256, "telnet:%s:%s%s",
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qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
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qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
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} else {
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snprintf(chr->filename, 256, "tcp:%s:%s%s",
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qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
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qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
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}
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if (is_listen && is_waitconnect) {
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printf("QEMU waiting for connection on: %s\n",
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chr->filename);
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tcp_chr_accept(chr);
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socket_set_nonblock(s->listen_fd);
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chr = qemu_chr_open_socket_fd(fd, do_nodelay, is_listen, is_telnet,
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is_waitconnect, &local_err);
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if (error_is_set(&local_err)) {
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goto fail;
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}
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return chr;
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fail:
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if (local_err) {
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qerror_report_err(local_err);
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@ -2539,8 +2572,10 @@ static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
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if (fd >= 0) {
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closesocket(fd);
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}
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g_free(s);
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g_free(chr);
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if (chr) {
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g_free(chr->opaque);
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g_free(chr);
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}
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return NULL;
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}
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@ -3124,6 +3159,28 @@ static CharDriverState *qmp_chardev_open_port(ChardevPort *port, Error **errp)
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#endif /* WIN32 */
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static CharDriverState *qmp_chardev_open_socket(ChardevSocket *sock,
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Error **errp)
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{
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SocketAddress *addr = sock->addr;
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bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
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bool is_listen = sock->has_server ? sock->server : true;
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bool is_telnet = sock->has_telnet ? sock->telnet : false;
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bool is_waitconnect = sock->has_wait ? sock->wait : false;
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int fd;
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if (is_listen) {
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fd = socket_listen(addr, errp);
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} else {
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fd = socket_connect(addr, errp, NULL, NULL);
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}
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if (error_is_set(errp)) {
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return NULL;
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}
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return qemu_chr_open_socket_fd(fd, do_nodelay, is_listen,
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is_telnet, is_waitconnect, errp);
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}
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ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
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Error **errp)
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{
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@ -3144,6 +3201,9 @@ ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
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case CHARDEV_BACKEND_KIND_PORT:
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chr = qmp_chardev_open_port(backend->port, errp);
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break;
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case CHARDEV_BACKEND_KIND_SOCKET:
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chr = qmp_chardev_open_socket(backend->socket, errp);
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break;
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case CHARDEV_BACKEND_KIND_NULL:
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chr = qemu_chr_open_null(NULL);
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break;
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