/* * QEMU System Emulator * * Copyright (c) 2003-2008 Fabrice Bellard * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "qemu/osdep.h" #include "qemu-common.h" #include "qemu/cutils.h" #include "monitor/monitor.h" #include "sysemu/sysemu.h" #include "sysemu/block-backend.h" #include "qemu/error-report.h" #include "qemu/timer.h" #include "sysemu/char.h" #include "hw/usb.h" #include "qmp-commands.h" #include "qapi/clone-visitor.h" #include "qapi-visit.h" #include "qemu/base64.h" #include "io/channel-socket.h" #include "io/channel-file.h" #include "io/channel-tls.h" #include "sysemu/replay.h" #include "qemu/help_option.h" #include #ifndef _WIN32 #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_BSD #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) #include #include #elif defined(__DragonFly__) #include #include #endif #else #ifdef __linux__ #include #include #endif #ifdef __sun__ #include #include #include #include #include #include #include // must come after ip.h #include #include #endif #endif #endif #include "qemu/sockets.h" #include "ui/qemu-spice.h" #define READ_BUF_LEN 4096 #define READ_RETRIES 10 #define TCP_MAX_FDS 16 /***********************************************************/ /* Socket address helpers */ static char *SocketAddress_to_str(const char *prefix, SocketAddress *addr, bool is_listen, bool is_telnet) { switch (addr->type) { case SOCKET_ADDRESS_KIND_INET: return g_strdup_printf("%s%s:%s:%s%s", prefix, is_telnet ? "telnet" : "tcp", addr->u.inet.data->host, addr->u.inet.data->port, is_listen ? ",server" : ""); break; case SOCKET_ADDRESS_KIND_UNIX: return g_strdup_printf("%sunix:%s%s", prefix, addr->u.q_unix.data->path, is_listen ? ",server" : ""); break; case SOCKET_ADDRESS_KIND_FD: return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.data->str, is_listen ? ",server" : ""); break; default: abort(); } } static char *sockaddr_to_str(struct sockaddr_storage *ss, socklen_t ss_len, struct sockaddr_storage *ps, socklen_t ps_len, bool is_listen, bool is_telnet) { char shost[NI_MAXHOST], sserv[NI_MAXSERV]; char phost[NI_MAXHOST], pserv[NI_MAXSERV]; const char *left = "", *right = ""; switch (ss->ss_family) { #ifndef _WIN32 case AF_UNIX: return g_strdup_printf("unix:%s%s", ((struct sockaddr_un *)(ss))->sun_path, is_listen ? ",server" : ""); #endif case AF_INET6: left = "["; right = "]"; /* fall through */ case AF_INET: getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost), sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV); getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost), pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV); return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s", is_telnet ? "telnet" : "tcp", left, shost, right, sserv, is_listen ? ",server" : "", left, phost, right, pserv); default: return g_strdup_printf("unknown"); } } /***********************************************************/ /* character device */ static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs = QTAILQ_HEAD_INITIALIZER(chardevs); static void qemu_chr_free_common(CharDriverState *chr); CharDriverState *qemu_chr_alloc(ChardevCommon *backend, Error **errp) { CharDriverState *chr = g_malloc0(sizeof(CharDriverState)); qemu_mutex_init(&chr->chr_write_lock); if (backend->has_logfile) { int flags = O_WRONLY | O_CREAT; if (backend->has_logappend && backend->logappend) { flags |= O_APPEND; } else { flags |= O_TRUNC; } chr->logfd = qemu_open(backend->logfile, flags, 0666); if (chr->logfd < 0) { error_setg_errno(errp, errno, "Unable to open logfile %s", backend->logfile); g_free(chr); return NULL; } } else { chr->logfd = -1; } return chr; } void qemu_chr_be_event(CharDriverState *s, int event) { /* Keep track if the char device is open */ switch (event) { case CHR_EVENT_OPENED: s->be_open = 1; break; case CHR_EVENT_CLOSED: s->be_open = 0; break; } if (!s->chr_event) return; s->chr_event(s->handler_opaque, event); } void qemu_chr_be_generic_open(CharDriverState *s) { qemu_chr_be_event(s, CHR_EVENT_OPENED); } /* Not reporting errors from writing to logfile, as logs are * defined to be "best effort" only */ static void qemu_chr_fe_write_log(CharDriverState *s, const uint8_t *buf, size_t len) { size_t done = 0; ssize_t ret; if (s->logfd < 0) { return; } while (done < len) { retry: ret = write(s->logfd, buf + done, len - done); if (ret == -1 && errno == EAGAIN) { g_usleep(100); goto retry; } if (ret <= 0) { return; } done += ret; } } static int qemu_chr_fe_write_buffer(CharDriverState *s, const uint8_t *buf, int len, int *offset) { int res = 0; *offset = 0; qemu_mutex_lock(&s->chr_write_lock); while (*offset < len) { retry: res = s->chr_write(s, buf + *offset, len - *offset); if (res < 0 && errno == EAGAIN) { g_usleep(100); goto retry; } if (res <= 0) { break; } *offset += res; } if (*offset > 0) { qemu_chr_fe_write_log(s, buf, *offset); } qemu_mutex_unlock(&s->chr_write_lock); return res; } int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len) { int ret; if (s->replay && replay_mode == REPLAY_MODE_PLAY) { int offset; replay_char_write_event_load(&ret, &offset); assert(offset <= len); qemu_chr_fe_write_buffer(s, buf, offset, &offset); return ret; } qemu_mutex_lock(&s->chr_write_lock); ret = s->chr_write(s, buf, len); if (ret > 0) { qemu_chr_fe_write_log(s, buf, ret); } qemu_mutex_unlock(&s->chr_write_lock); if (s->replay && replay_mode == REPLAY_MODE_RECORD) { replay_char_write_event_save(ret, ret < 0 ? 0 : ret); } return ret; } int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len) { int offset; int res; if (s->replay && replay_mode == REPLAY_MODE_PLAY) { replay_char_write_event_load(&res, &offset); assert(offset <= len); qemu_chr_fe_write_buffer(s, buf, offset, &offset); return res; } res = qemu_chr_fe_write_buffer(s, buf, len, &offset); if (s->replay && replay_mode == REPLAY_MODE_RECORD) { replay_char_write_event_save(res, offset); } if (res < 0) { return res; } return offset; } int qemu_chr_fe_read_all(CharDriverState *s, uint8_t *buf, int len) { int offset = 0, counter = 10; int res; if (!s->chr_sync_read) { return 0; } if (s->replay && replay_mode == REPLAY_MODE_PLAY) { return replay_char_read_all_load(buf); } while (offset < len) { retry: res = s->chr_sync_read(s, buf + offset, len - offset); if (res == -1 && errno == EAGAIN) { g_usleep(100); goto retry; } if (res == 0) { break; } if (res < 0) { if (s->replay && replay_mode == REPLAY_MODE_RECORD) { replay_char_read_all_save_error(res); } return res; } offset += res; if (!counter--) { break; } } if (s->replay && replay_mode == REPLAY_MODE_RECORD) { replay_char_read_all_save_buf(buf, offset); } return offset; } int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg) { int res; if (!s->chr_ioctl || s->replay) { res = -ENOTSUP; } else { res = s->chr_ioctl(s, cmd, arg); } return res; } int qemu_chr_be_can_write(CharDriverState *s) { if (!s->chr_can_read) return 0; return s->chr_can_read(s->handler_opaque); } void qemu_chr_be_write_impl(CharDriverState *s, uint8_t *buf, int len) { if (s->chr_read) { s->chr_read(s->handler_opaque, buf, len); } } void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len) { if (s->replay) { if (replay_mode == REPLAY_MODE_PLAY) { return; } replay_chr_be_write(s, buf, len); } else { qemu_chr_be_write_impl(s, buf, len); } } int qemu_chr_fe_get_msgfd(CharDriverState *s) { int fd; int res = (qemu_chr_fe_get_msgfds(s, &fd, 1) == 1) ? fd : -1; if (s->replay) { fprintf(stderr, "Replay: get msgfd is not supported for serial devices yet\n"); exit(1); } return res; } int qemu_chr_fe_get_msgfds(CharDriverState *s, int *fds, int len) { return s->get_msgfds ? s->get_msgfds(s, fds, len) : -1; } int qemu_chr_fe_set_msgfds(CharDriverState *s, int *fds, int num) { return s->set_msgfds ? s->set_msgfds(s, fds, num) : -1; } int qemu_chr_add_client(CharDriverState *s, int fd) { return s->chr_add_client ? s->chr_add_client(s, fd) : -1; } void qemu_chr_accept_input(CharDriverState *s) { if (s->chr_accept_input) s->chr_accept_input(s); qemu_notify_event(); } void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...) { char buf[READ_BUF_LEN]; va_list ap; va_start(ap, fmt); vsnprintf(buf, sizeof(buf), fmt, ap); /* XXX this blocks entire thread. Rewrite to use * qemu_chr_fe_write and background I/O callbacks */ qemu_chr_fe_write_all(s, (uint8_t *)buf, strlen(buf)); va_end(ap); } static void remove_fd_in_watch(CharDriverState *chr); void qemu_chr_add_handlers_full(CharDriverState *s, IOCanReadHandler *fd_can_read, IOReadHandler *fd_read, IOEventHandler *fd_event, void *opaque, GMainContext *context) { int fe_open; if (!opaque && !fd_can_read && !fd_read && !fd_event) { fe_open = 0; remove_fd_in_watch(s); } else { fe_open = 1; } s->chr_can_read = fd_can_read; s->chr_read = fd_read; s->chr_event = fd_event; s->handler_opaque = opaque; if (s->chr_update_read_handler) { s->chr_update_read_handler(s, context); } if (!s->explicit_fe_open) { qemu_chr_fe_set_open(s, fe_open); } /* We're connecting to an already opened device, so let's make sure we also get the open event */ if (fe_open && s->be_open) { qemu_chr_be_generic_open(s); } } void qemu_chr_add_handlers(CharDriverState *s, IOCanReadHandler *fd_can_read, IOReadHandler *fd_read, IOEventHandler *fd_event, void *opaque) { qemu_chr_add_handlers_full(s, fd_can_read, fd_read, fd_event, opaque, NULL); } static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { return len; } static CharDriverState *qemu_chr_open_null(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { CharDriverState *chr; ChardevCommon *common = backend->u.null.data; chr = qemu_chr_alloc(common, errp); if (!chr) { return NULL; } chr->chr_write = null_chr_write; chr->explicit_be_open = true; return chr; } /* MUX driver for serial I/O splitting */ #define MAX_MUX 4 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */ #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1) typedef struct { IOCanReadHandler *chr_can_read[MAX_MUX]; IOReadHandler *chr_read[MAX_MUX]; IOEventHandler *chr_event[MAX_MUX]; void *ext_opaque[MAX_MUX]; CharDriverState *drv; int focus; int mux_cnt; int term_got_escape; int max_size; /* Intermediate input buffer allows to catch escape sequences even if the currently active device is not accepting any input - but only until it is full as well. */ unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE]; int prod[MAX_MUX]; int cons[MAX_MUX]; int timestamps; /* Protected by the CharDriverState chr_write_lock. */ int linestart; int64_t timestamps_start; } MuxDriver; /* Called with chr_write_lock held. */ static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { MuxDriver *d = chr->opaque; int ret; if (!d->timestamps) { ret = qemu_chr_fe_write(d->drv, buf, len); } else { int i; ret = 0; for (i = 0; i < len; i++) { if (d->linestart) { char buf1[64]; int64_t ti; int secs; ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); if (d->timestamps_start == -1) d->timestamps_start = ti; ti -= d->timestamps_start; secs = ti / 1000; snprintf(buf1, sizeof(buf1), "[%02d:%02d:%02d.%03d] ", secs / 3600, (secs / 60) % 60, secs % 60, (int)(ti % 1000)); /* XXX this blocks entire thread. Rewrite to use * qemu_chr_fe_write and background I/O callbacks */ qemu_chr_fe_write_all(d->drv, (uint8_t *)buf1, strlen(buf1)); d->linestart = 0; } ret += qemu_chr_fe_write(d->drv, buf+i, 1); if (buf[i] == '\n') { d->linestart = 1; } } } return ret; } static const char * const mux_help[] = { "% h print this help\n\r", "% x exit emulator\n\r", "% s save disk data back to file (if -snapshot)\n\r", "% t toggle console timestamps\n\r", "% b send break (magic sysrq)\n\r", "% c switch between console and monitor\n\r", "% % sends %\n\r", NULL }; int term_escape_char = 0x01; /* ctrl-a is used for escape */ static void mux_print_help(CharDriverState *chr) { int i, j; char ebuf[15] = "Escape-Char"; char cbuf[50] = "\n\r"; if (term_escape_char > 0 && term_escape_char < 26) { snprintf(cbuf, sizeof(cbuf), "\n\r"); snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a'); } else { snprintf(cbuf, sizeof(cbuf), "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r", term_escape_char); } /* XXX this blocks entire thread. Rewrite to use * qemu_chr_fe_write and background I/O callbacks */ qemu_chr_fe_write_all(chr, (uint8_t *)cbuf, strlen(cbuf)); for (i = 0; mux_help[i] != NULL; i++) { for (j=0; mux_help[i][j] != '\0'; j++) { if (mux_help[i][j] == '%') qemu_chr_fe_write_all(chr, (uint8_t *)ebuf, strlen(ebuf)); else qemu_chr_fe_write_all(chr, (uint8_t *)&mux_help[i][j], 1); } } } static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event) { if (d->chr_event[mux_nr]) d->chr_event[mux_nr](d->ext_opaque[mux_nr], event); } static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch) { if (d->term_got_escape) { d->term_got_escape = 0; if (ch == term_escape_char) goto send_char; switch(ch) { case '?': case 'h': mux_print_help(chr); break; case 'x': { const char *term = "QEMU: Terminated\n\r"; qemu_chr_fe_write_all(chr, (uint8_t *)term, strlen(term)); exit(0); break; } case 's': blk_commit_all(); break; case 'b': qemu_chr_be_event(chr, CHR_EVENT_BREAK); break; case 'c': /* Switch to the next registered device */ mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT); d->focus++; if (d->focus >= d->mux_cnt) d->focus = 0; mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN); break; case 't': d->timestamps = !d->timestamps; d->timestamps_start = -1; d->linestart = 0; break; } } else if (ch == term_escape_char) { d->term_got_escape = 1; } else { send_char: return 1; } return 0; } static void mux_chr_accept_input(CharDriverState *chr) { MuxDriver *d = chr->opaque; int m = d->focus; while (d->prod[m] != d->cons[m] && d->chr_can_read[m] && d->chr_can_read[m](d->ext_opaque[m])) { d->chr_read[m](d->ext_opaque[m], &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1); } } static int mux_chr_can_read(void *opaque) { CharDriverState *chr = opaque; MuxDriver *d = chr->opaque; int m = d->focus; if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) return 1; if (d->chr_can_read[m]) return d->chr_can_read[m](d->ext_opaque[m]); return 0; } static void mux_chr_read(void *opaque, const uint8_t *buf, int size) { CharDriverState *chr = opaque; MuxDriver *d = chr->opaque; int m = d->focus; int i; mux_chr_accept_input (opaque); for(i = 0; i < size; i++) if (mux_proc_byte(chr, d, buf[i])) { if (d->prod[m] == d->cons[m] && d->chr_can_read[m] && d->chr_can_read[m](d->ext_opaque[m])) d->chr_read[m](d->ext_opaque[m], &buf[i], 1); else d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i]; } } static void mux_chr_event(void *opaque, int event) { CharDriverState *chr = opaque; MuxDriver *d = chr->opaque; int i; /* Send the event to all registered listeners */ for (i = 0; i < d->mux_cnt; i++) mux_chr_send_event(d, i, event); } static void mux_chr_update_read_handler(CharDriverState *chr, GMainContext *context) { MuxDriver *d = chr->opaque; if (d->mux_cnt >= MAX_MUX) { fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n"); return; } d->ext_opaque[d->mux_cnt] = chr->handler_opaque; d->chr_can_read[d->mux_cnt] = chr->chr_can_read; d->chr_read[d->mux_cnt] = chr->chr_read; d->chr_event[d->mux_cnt] = chr->chr_event; /* Fix up the real driver with mux routines */ if (d->mux_cnt == 0) { qemu_chr_add_handlers_full(d->drv, mux_chr_can_read, mux_chr_read, mux_chr_event, chr, context); } if (d->focus != -1) { mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT); } d->focus = d->mux_cnt; d->mux_cnt++; mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN); } static bool muxes_realized; /** * Called after processing of default and command-line-specified * chardevs to deliver CHR_EVENT_OPENED events to any FEs attached * to a mux chardev. This is done here to ensure that * output/prompts/banners are only displayed for the FE that has * focus when initial command-line processing/machine init is * completed. * * After this point, any new FE attached to any new or existing * mux will receive CHR_EVENT_OPENED notifications for the BE * immediately. */ static void muxes_realize_done(Notifier *notifier, void *unused) { CharDriverState *chr; QTAILQ_FOREACH(chr, &chardevs, next) { if (chr->is_mux) { MuxDriver *d = chr->opaque; int i; /* send OPENED to all already-attached FEs */ for (i = 0; i < d->mux_cnt; i++) { mux_chr_send_event(d, i, CHR_EVENT_OPENED); } /* mark mux as OPENED so any new FEs will immediately receive * OPENED event */ qemu_chr_be_generic_open(chr); } } muxes_realized = true; } static Notifier muxes_realize_notify = { .notify = muxes_realize_done, }; static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond) { MuxDriver *d = s->opaque; return d->drv->chr_add_watch(d->drv, cond); } static void mux_chr_close(struct CharDriverState *chr) { MuxDriver *d = chr->opaque; g_free(d); } static CharDriverState *qemu_chr_open_mux(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevMux *mux = backend->u.mux.data; CharDriverState *chr, *drv; MuxDriver *d; ChardevCommon *common = qapi_ChardevMux_base(mux); drv = qemu_chr_find(mux->chardev); if (drv == NULL) { error_setg(errp, "mux: base chardev %s not found", mux->chardev); return NULL; } chr = qemu_chr_alloc(common, errp); if (!chr) { return NULL; } d = g_new0(MuxDriver, 1); chr->opaque = d; d->drv = drv; d->focus = -1; chr->chr_close = mux_chr_close; chr->chr_write = mux_chr_write; chr->chr_update_read_handler = mux_chr_update_read_handler; chr->chr_accept_input = mux_chr_accept_input; /* Frontend guest-open / -close notification is not support with muxes */ chr->chr_set_fe_open = NULL; if (drv->chr_add_watch) { chr->chr_add_watch = mux_chr_add_watch; } /* only default to opened state if we've realized the initial * set of muxes */ chr->explicit_be_open = muxes_realized ? 0 : 1; chr->is_mux = 1; return chr; } typedef struct IOWatchPoll { GSource parent; QIOChannel *ioc; GSource *src; IOCanReadHandler *fd_can_read; GSourceFunc fd_read; void *opaque; GMainContext *context; } IOWatchPoll; static IOWatchPoll *io_watch_poll_from_source(GSource *source) { return container_of(source, IOWatchPoll, parent); } static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_) { IOWatchPoll *iwp = io_watch_poll_from_source(source); bool now_active = iwp->fd_can_read(iwp->opaque) > 0; bool was_active = iwp->src != NULL; if (was_active == now_active) { return FALSE; } if (now_active) { iwp->src = qio_channel_create_watch( iwp->ioc, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL); g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque, NULL); g_source_attach(iwp->src, iwp->context); } else { g_source_destroy(iwp->src); g_source_unref(iwp->src); iwp->src = NULL; } return FALSE; } static gboolean io_watch_poll_check(GSource *source) { return FALSE; } static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback, gpointer user_data) { abort(); } static void io_watch_poll_finalize(GSource *source) { /* Due to a glib bug, removing the last reference to a source * inside a finalize callback causes recursive locking (and a * deadlock). This is not a problem inside other callbacks, * including dispatch callbacks, so we call io_remove_watch_poll * to remove this source. At this point, iwp->src must * be NULL, or we would leak it. * * This would be solved much more elegantly by child sources, * but we support older glib versions that do not have them. */ IOWatchPoll *iwp = io_watch_poll_from_source(source); assert(iwp->src == NULL); } static GSourceFuncs io_watch_poll_funcs = { .prepare = io_watch_poll_prepare, .check = io_watch_poll_check, .dispatch = io_watch_poll_dispatch, .finalize = io_watch_poll_finalize, }; /* Can only be used for read */ static guint io_add_watch_poll(QIOChannel *ioc, IOCanReadHandler *fd_can_read, QIOChannelFunc fd_read, gpointer user_data, GMainContext *context) { IOWatchPoll *iwp; int tag; iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs, sizeof(IOWatchPoll)); iwp->fd_can_read = fd_can_read; iwp->opaque = user_data; iwp->ioc = ioc; iwp->fd_read = (GSourceFunc) fd_read; iwp->src = NULL; iwp->context = context; tag = g_source_attach(&iwp->parent, context); g_source_unref(&iwp->parent); return tag; } static void io_remove_watch_poll(guint tag) { GSource *source; IOWatchPoll *iwp; g_return_if_fail (tag > 0); source = g_main_context_find_source_by_id(NULL, tag); g_return_if_fail (source != NULL); iwp = io_watch_poll_from_source(source); if (iwp->src) { g_source_destroy(iwp->src); g_source_unref(iwp->src); iwp->src = NULL; } g_source_destroy(&iwp->parent); } static void remove_fd_in_watch(CharDriverState *chr) { if (chr->fd_in_tag) { io_remove_watch_poll(chr->fd_in_tag); chr->fd_in_tag = 0; } } static int io_channel_send_full(QIOChannel *ioc, const void *buf, size_t len, int *fds, size_t nfds) { size_t offset = 0; while (offset < len) { ssize_t ret = 0; struct iovec iov = { .iov_base = (char *)buf + offset, .iov_len = len - offset }; ret = qio_channel_writev_full( ioc, &iov, 1, fds, nfds, NULL); if (ret == QIO_CHANNEL_ERR_BLOCK) { if (offset) { return offset; } errno = EAGAIN; return -1; } else if (ret < 0) { errno = EINVAL; return -1; } offset += ret; } return offset; } #ifndef _WIN32 static int io_channel_send(QIOChannel *ioc, const void *buf, size_t len) { return io_channel_send_full(ioc, buf, len, NULL, 0); } typedef struct FDCharDriver { CharDriverState *chr; QIOChannel *ioc_in, *ioc_out; int max_size; } FDCharDriver; /* Called with chr_write_lock held. */ static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { FDCharDriver *s = chr->opaque; return io_channel_send(s->ioc_out, buf, len); } static gboolean fd_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) { CharDriverState *chr = opaque; FDCharDriver *s = chr->opaque; int len; uint8_t buf[READ_BUF_LEN]; ssize_t ret; len = sizeof(buf); if (len > s->max_size) { len = s->max_size; } if (len == 0) { return TRUE; } ret = qio_channel_read( chan, (gchar *)buf, len, NULL); if (ret == 0) { remove_fd_in_watch(chr); qemu_chr_be_event(chr, CHR_EVENT_CLOSED); return FALSE; } if (ret > 0) { qemu_chr_be_write(chr, buf, ret); } return TRUE; } static int fd_chr_read_poll(void *opaque) { CharDriverState *chr = opaque; FDCharDriver *s = chr->opaque; s->max_size = qemu_chr_be_can_write(chr); return s->max_size; } static GSource *fd_chr_add_watch(CharDriverState *chr, GIOCondition cond) { FDCharDriver *s = chr->opaque; return qio_channel_create_watch(s->ioc_out, cond); } static void fd_chr_update_read_handler(CharDriverState *chr, GMainContext *context) { FDCharDriver *s = chr->opaque; remove_fd_in_watch(chr); if (s->ioc_in) { chr->fd_in_tag = io_add_watch_poll(s->ioc_in, fd_chr_read_poll, fd_chr_read, chr, context); } } static void fd_chr_close(struct CharDriverState *chr) { FDCharDriver *s = chr->opaque; remove_fd_in_watch(chr); if (s->ioc_in) { object_unref(OBJECT(s->ioc_in)); } if (s->ioc_out) { object_unref(OBJECT(s->ioc_out)); } g_free(s); qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } /* open a character device to a unix fd */ static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out, ChardevCommon *backend, Error **errp) { CharDriverState *chr; FDCharDriver *s; chr = qemu_chr_alloc(backend, errp); if (!chr) { return NULL; } s = g_new0(FDCharDriver, 1); s->ioc_in = QIO_CHANNEL(qio_channel_file_new_fd(fd_in)); s->ioc_out = QIO_CHANNEL(qio_channel_file_new_fd(fd_out)); qemu_set_nonblock(fd_out); s->chr = chr; chr->opaque = s; chr->chr_add_watch = fd_chr_add_watch; chr->chr_write = fd_chr_write; chr->chr_update_read_handler = fd_chr_update_read_handler; chr->chr_close = fd_chr_close; return chr; } static CharDriverState *qemu_chr_open_pipe(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevHostdev *opts = backend->u.pipe.data; int fd_in, fd_out; char *filename_in; char *filename_out; const char *filename = opts->device; ChardevCommon *common = qapi_ChardevHostdev_base(opts); filename_in = g_strdup_printf("%s.in", filename); filename_out = g_strdup_printf("%s.out", filename); TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY)); TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY)); g_free(filename_in); g_free(filename_out); if (fd_in < 0 || fd_out < 0) { if (fd_in >= 0) close(fd_in); if (fd_out >= 0) close(fd_out); TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY)); if (fd_in < 0) { error_setg_file_open(errp, errno, filename); return NULL; } } return qemu_chr_open_fd(fd_in, fd_out, common, errp); } /* init terminal so that we can grab keys */ static struct termios oldtty; static int old_fd0_flags; static bool stdio_in_use; static bool stdio_allow_signal; static bool stdio_echo_state; static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo); static void term_exit(void) { tcsetattr (0, TCSANOW, &oldtty); fcntl(0, F_SETFL, old_fd0_flags); } static void term_stdio_handler(int sig) { /* restore echo after resume from suspend. */ qemu_chr_set_echo_stdio(NULL, stdio_echo_state); } static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo) { struct termios tty; stdio_echo_state = echo; tty = oldtty; if (!echo) { tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |INLCR|IGNCR|ICRNL|IXON); tty.c_oflag |= OPOST; tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); tty.c_cflag &= ~(CSIZE|PARENB); tty.c_cflag |= CS8; tty.c_cc[VMIN] = 1; tty.c_cc[VTIME] = 0; } if (!stdio_allow_signal) tty.c_lflag &= ~ISIG; tcsetattr (0, TCSANOW, &tty); } static void qemu_chr_close_stdio(struct CharDriverState *chr) { term_exit(); fd_chr_close(chr); } static CharDriverState *qemu_chr_open_stdio(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevStdio *opts = backend->u.stdio.data; CharDriverState *chr; struct sigaction act; ChardevCommon *common = qapi_ChardevStdio_base(opts); if (is_daemonized()) { error_setg(errp, "cannot use stdio with -daemonize"); return NULL; } if (stdio_in_use) { error_setg(errp, "cannot use stdio by multiple character devices"); return NULL; } stdio_in_use = true; old_fd0_flags = fcntl(0, F_GETFL); tcgetattr(0, &oldtty); qemu_set_nonblock(0); atexit(term_exit); memset(&act, 0, sizeof(act)); act.sa_handler = term_stdio_handler; sigaction(SIGCONT, &act, NULL); chr = qemu_chr_open_fd(0, 1, common, errp); if (!chr) { return NULL; } chr->chr_close = qemu_chr_close_stdio; chr->chr_set_echo = qemu_chr_set_echo_stdio; if (opts->has_signal) { stdio_allow_signal = opts->signal; } qemu_chr_fe_set_echo(chr, false); return chr; } #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \ || defined(__GLIBC__) #define HAVE_CHARDEV_SERIAL 1 #define HAVE_CHARDEV_PTY 1 typedef struct { QIOChannel *ioc; int read_bytes; /* Protected by the CharDriverState chr_write_lock. */ int connected; guint timer_tag; guint open_tag; } PtyCharDriver; static void pty_chr_update_read_handler_locked(CharDriverState *chr); static void pty_chr_state(CharDriverState *chr, int connected); static gboolean pty_chr_timer(gpointer opaque) { struct CharDriverState *chr = opaque; PtyCharDriver *s = chr->opaque; qemu_mutex_lock(&chr->chr_write_lock); s->timer_tag = 0; s->open_tag = 0; if (!s->connected) { /* Next poll ... */ pty_chr_update_read_handler_locked(chr); } qemu_mutex_unlock(&chr->chr_write_lock); return FALSE; } /* Called with chr_write_lock held. */ static void pty_chr_rearm_timer(CharDriverState *chr, int ms) { PtyCharDriver *s = chr->opaque; if (s->timer_tag) { g_source_remove(s->timer_tag); s->timer_tag = 0; } if (ms == 1000) { s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr); } else { s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr); } } /* Called with chr_write_lock held. */ static void pty_chr_update_read_handler_locked(CharDriverState *chr) { PtyCharDriver *s = chr->opaque; GPollFD pfd; int rc; QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc); pfd.fd = fioc->fd; pfd.events = G_IO_OUT; pfd.revents = 0; do { rc = g_poll(&pfd, 1, 0); } while (rc == -1 && errno == EINTR); assert(rc >= 0); if (pfd.revents & G_IO_HUP) { pty_chr_state(chr, 0); } else { pty_chr_state(chr, 1); } } static void pty_chr_update_read_handler(CharDriverState *chr, GMainContext *context) { qemu_mutex_lock(&chr->chr_write_lock); pty_chr_update_read_handler_locked(chr); qemu_mutex_unlock(&chr->chr_write_lock); } /* Called with chr_write_lock held. */ static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { PtyCharDriver *s = chr->opaque; if (!s->connected) { /* guest sends data, check for (re-)connect */ pty_chr_update_read_handler_locked(chr); if (!s->connected) { return 0; } } return io_channel_send(s->ioc, buf, len); } static GSource *pty_chr_add_watch(CharDriverState *chr, GIOCondition cond) { PtyCharDriver *s = chr->opaque; if (!s->connected) { return NULL; } return qio_channel_create_watch(s->ioc, cond); } static int pty_chr_read_poll(void *opaque) { CharDriverState *chr = opaque; PtyCharDriver *s = chr->opaque; s->read_bytes = qemu_chr_be_can_write(chr); return s->read_bytes; } static gboolean pty_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) { CharDriverState *chr = opaque; PtyCharDriver *s = chr->opaque; gsize len; uint8_t buf[READ_BUF_LEN]; ssize_t ret; len = sizeof(buf); if (len > s->read_bytes) len = s->read_bytes; if (len == 0) { return TRUE; } ret = qio_channel_read(s->ioc, (char *)buf, len, NULL); if (ret <= 0) { pty_chr_state(chr, 0); return FALSE; } else { pty_chr_state(chr, 1); qemu_chr_be_write(chr, buf, ret); } return TRUE; } static gboolean qemu_chr_be_generic_open_func(gpointer opaque) { CharDriverState *chr = opaque; PtyCharDriver *s = chr->opaque; s->open_tag = 0; qemu_chr_be_generic_open(chr); return FALSE; } /* Called with chr_write_lock held. */ static void pty_chr_state(CharDriverState *chr, int connected) { PtyCharDriver *s = chr->opaque; if (!connected) { if (s->open_tag) { g_source_remove(s->open_tag); s->open_tag = 0; } remove_fd_in_watch(chr); s->connected = 0; /* (re-)connect poll interval for idle guests: once per second. * We check more frequently in case the guests sends data to * the virtual device linked to our pty. */ pty_chr_rearm_timer(chr, 1000); } else { if (s->timer_tag) { g_source_remove(s->timer_tag); s->timer_tag = 0; } if (!s->connected) { g_assert(s->open_tag == 0); s->connected = 1; s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr); } if (!chr->fd_in_tag) { chr->fd_in_tag = io_add_watch_poll(s->ioc, pty_chr_read_poll, pty_chr_read, chr, NULL); } } } static void pty_chr_close(struct CharDriverState *chr) { PtyCharDriver *s = chr->opaque; qemu_mutex_lock(&chr->chr_write_lock); pty_chr_state(chr, 0); object_unref(OBJECT(s->ioc)); if (s->timer_tag) { g_source_remove(s->timer_tag); s->timer_tag = 0; } qemu_mutex_unlock(&chr->chr_write_lock); g_free(s); qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } static CharDriverState *qemu_chr_open_pty(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { CharDriverState *chr; PtyCharDriver *s; int master_fd, slave_fd; char pty_name[PATH_MAX]; ChardevCommon *common = backend->u.pty.data; master_fd = qemu_openpty_raw(&slave_fd, pty_name); if (master_fd < 0) { error_setg_errno(errp, errno, "Failed to create PTY"); return NULL; } close(slave_fd); qemu_set_nonblock(master_fd); chr = qemu_chr_alloc(common, errp); if (!chr) { close(master_fd); return NULL; } chr->filename = g_strdup_printf("pty:%s", pty_name); ret->pty = g_strdup(pty_name); ret->has_pty = true; fprintf(stderr, "char device redirected to %s (label %s)\n", pty_name, id); s = g_new0(PtyCharDriver, 1); chr->opaque = s; chr->chr_write = pty_chr_write; chr->chr_update_read_handler = pty_chr_update_read_handler; chr->chr_close = pty_chr_close; chr->chr_add_watch = pty_chr_add_watch; chr->explicit_be_open = true; s->ioc = QIO_CHANNEL(qio_channel_file_new_fd(master_fd)); s->timer_tag = 0; return chr; } static void tty_serial_init(int fd, int speed, int parity, int data_bits, int stop_bits) { struct termios tty; speed_t spd; #if 0 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n", speed, parity, data_bits, stop_bits); #endif tcgetattr (fd, &tty); #define check_speed(val) if (speed <= val) { spd = B##val; break; } speed = speed * 10 / 11; do { check_speed(50); check_speed(75); check_speed(110); check_speed(134); check_speed(150); check_speed(200); check_speed(300); check_speed(600); check_speed(1200); check_speed(1800); check_speed(2400); check_speed(4800); check_speed(9600); check_speed(19200); check_speed(38400); /* Non-Posix values follow. They may be unsupported on some systems. */ check_speed(57600); check_speed(115200); #ifdef B230400 check_speed(230400); #endif #ifdef B460800 check_speed(460800); #endif #ifdef B500000 check_speed(500000); #endif #ifdef B576000 check_speed(576000); #endif #ifdef B921600 check_speed(921600); #endif #ifdef B1000000 check_speed(1000000); #endif #ifdef B1152000 check_speed(1152000); #endif #ifdef B1500000 check_speed(1500000); #endif #ifdef B2000000 check_speed(2000000); #endif #ifdef B2500000 check_speed(2500000); #endif #ifdef B3000000 check_speed(3000000); #endif #ifdef B3500000 check_speed(3500000); #endif #ifdef B4000000 check_speed(4000000); #endif spd = B115200; } while (0); cfsetispeed(&tty, spd); cfsetospeed(&tty, spd); tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |INLCR|IGNCR|ICRNL|IXON); tty.c_oflag |= OPOST; tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG); tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB); switch(data_bits) { default: case 8: tty.c_cflag |= CS8; break; case 7: tty.c_cflag |= CS7; break; case 6: tty.c_cflag |= CS6; break; case 5: tty.c_cflag |= CS5; break; } switch(parity) { default: case 'N': break; case 'E': tty.c_cflag |= PARENB; break; case 'O': tty.c_cflag |= PARENB | PARODD; break; } if (stop_bits == 2) tty.c_cflag |= CSTOPB; tcsetattr (fd, TCSANOW, &tty); } static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg) { FDCharDriver *s = chr->opaque; QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc_in); switch(cmd) { case CHR_IOCTL_SERIAL_SET_PARAMS: { QEMUSerialSetParams *ssp = arg; tty_serial_init(fioc->fd, ssp->speed, ssp->parity, ssp->data_bits, ssp->stop_bits); } break; case CHR_IOCTL_SERIAL_SET_BREAK: { int enable = *(int *)arg; if (enable) { tcsendbreak(fioc->fd, 1); } } break; case CHR_IOCTL_SERIAL_GET_TIOCM: { int sarg = 0; int *targ = (int *)arg; ioctl(fioc->fd, TIOCMGET, &sarg); *targ = 0; if (sarg & TIOCM_CTS) *targ |= CHR_TIOCM_CTS; if (sarg & TIOCM_CAR) *targ |= CHR_TIOCM_CAR; if (sarg & TIOCM_DSR) *targ |= CHR_TIOCM_DSR; if (sarg & TIOCM_RI) *targ |= CHR_TIOCM_RI; if (sarg & TIOCM_DTR) *targ |= CHR_TIOCM_DTR; if (sarg & TIOCM_RTS) *targ |= CHR_TIOCM_RTS; } break; case CHR_IOCTL_SERIAL_SET_TIOCM: { int sarg = *(int *)arg; int targ = 0; ioctl(fioc->fd, TIOCMGET, &targ); targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS); if (sarg & CHR_TIOCM_CTS) targ |= TIOCM_CTS; if (sarg & CHR_TIOCM_CAR) targ |= TIOCM_CAR; if (sarg & CHR_TIOCM_DSR) targ |= TIOCM_DSR; if (sarg & CHR_TIOCM_RI) targ |= TIOCM_RI; if (sarg & CHR_TIOCM_DTR) targ |= TIOCM_DTR; if (sarg & CHR_TIOCM_RTS) targ |= TIOCM_RTS; ioctl(fioc->fd, TIOCMSET, &targ); } break; default: return -ENOTSUP; } return 0; } static void qemu_chr_close_tty(CharDriverState *chr) { fd_chr_close(chr); } static CharDriverState *qemu_chr_open_tty_fd(int fd, ChardevCommon *backend, Error **errp) { CharDriverState *chr; tty_serial_init(fd, 115200, 'N', 8, 1); chr = qemu_chr_open_fd(fd, fd, backend, errp); if (!chr) { return NULL; } chr->chr_ioctl = tty_serial_ioctl; chr->chr_close = qemu_chr_close_tty; return chr; } #endif /* __linux__ || __sun__ */ #if defined(__linux__) #define HAVE_CHARDEV_PARPORT 1 typedef struct { int fd; int mode; } ParallelCharDriver; static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode) { if (s->mode != mode) { int m = mode; if (ioctl(s->fd, PPSETMODE, &m) < 0) return 0; s->mode = mode; } return 1; } static int pp_ioctl(CharDriverState *chr, int cmd, void *arg) { ParallelCharDriver *drv = chr->opaque; int fd = drv->fd; uint8_t b; switch(cmd) { case CHR_IOCTL_PP_READ_DATA: if (ioctl(fd, PPRDATA, &b) < 0) return -ENOTSUP; *(uint8_t *)arg = b; break; case CHR_IOCTL_PP_WRITE_DATA: b = *(uint8_t *)arg; if (ioctl(fd, PPWDATA, &b) < 0) return -ENOTSUP; break; case CHR_IOCTL_PP_READ_CONTROL: if (ioctl(fd, PPRCONTROL, &b) < 0) return -ENOTSUP; /* Linux gives only the lowest bits, and no way to know data direction! For better compatibility set the fixed upper bits. */ *(uint8_t *)arg = b | 0xc0; break; case CHR_IOCTL_PP_WRITE_CONTROL: b = *(uint8_t *)arg; if (ioctl(fd, PPWCONTROL, &b) < 0) return -ENOTSUP; break; case CHR_IOCTL_PP_READ_STATUS: if (ioctl(fd, PPRSTATUS, &b) < 0) return -ENOTSUP; *(uint8_t *)arg = b; break; case CHR_IOCTL_PP_DATA_DIR: if (ioctl(fd, PPDATADIR, (int *)arg) < 0) return -ENOTSUP; break; case CHR_IOCTL_PP_EPP_READ_ADDR: if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) { struct ParallelIOArg *parg = arg; int n = read(fd, parg->buffer, parg->count); if (n != parg->count) { return -EIO; } } break; case CHR_IOCTL_PP_EPP_READ: if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) { struct ParallelIOArg *parg = arg; int n = read(fd, parg->buffer, parg->count); if (n != parg->count) { return -EIO; } } break; case CHR_IOCTL_PP_EPP_WRITE_ADDR: if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) { struct ParallelIOArg *parg = arg; int n = write(fd, parg->buffer, parg->count); if (n != parg->count) { return -EIO; } } break; case CHR_IOCTL_PP_EPP_WRITE: if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) { struct ParallelIOArg *parg = arg; int n = write(fd, parg->buffer, parg->count); if (n != parg->count) { return -EIO; } } break; default: return -ENOTSUP; } return 0; } static void pp_close(CharDriverState *chr) { ParallelCharDriver *drv = chr->opaque; int fd = drv->fd; pp_hw_mode(drv, IEEE1284_MODE_COMPAT); ioctl(fd, PPRELEASE); close(fd); g_free(drv); qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } static CharDriverState *qemu_chr_open_pp_fd(int fd, ChardevCommon *backend, Error **errp) { CharDriverState *chr; ParallelCharDriver *drv; if (ioctl(fd, PPCLAIM) < 0) { error_setg_errno(errp, errno, "not a parallel port"); close(fd); return NULL; } chr = qemu_chr_alloc(backend, errp); if (!chr) { return NULL; } drv = g_new0(ParallelCharDriver, 1); chr->opaque = drv; chr->chr_write = null_chr_write; chr->chr_ioctl = pp_ioctl; chr->chr_close = pp_close; drv->fd = fd; drv->mode = IEEE1284_MODE_COMPAT; return chr; } #endif /* __linux__ */ #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) #define HAVE_CHARDEV_PARPORT 1 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg) { int fd = (int)(intptr_t)chr->opaque; uint8_t b; switch(cmd) { case CHR_IOCTL_PP_READ_DATA: if (ioctl(fd, PPIGDATA, &b) < 0) return -ENOTSUP; *(uint8_t *)arg = b; break; case CHR_IOCTL_PP_WRITE_DATA: b = *(uint8_t *)arg; if (ioctl(fd, PPISDATA, &b) < 0) return -ENOTSUP; break; case CHR_IOCTL_PP_READ_CONTROL: if (ioctl(fd, PPIGCTRL, &b) < 0) return -ENOTSUP; *(uint8_t *)arg = b; break; case CHR_IOCTL_PP_WRITE_CONTROL: b = *(uint8_t *)arg; if (ioctl(fd, PPISCTRL, &b) < 0) return -ENOTSUP; break; case CHR_IOCTL_PP_READ_STATUS: if (ioctl(fd, PPIGSTATUS, &b) < 0) return -ENOTSUP; *(uint8_t *)arg = b; break; default: return -ENOTSUP; } return 0; } static CharDriverState *qemu_chr_open_pp_fd(int fd, ChardevCommon *backend, Error **errp) { CharDriverState *chr; chr = qemu_chr_alloc(backend, errp); if (!chr) { return NULL; } chr->opaque = (void *)(intptr_t)fd; chr->chr_write = null_chr_write; chr->chr_ioctl = pp_ioctl; chr->explicit_be_open = true; return chr; } #endif #else /* _WIN32 */ #define HAVE_CHARDEV_SERIAL 1 typedef struct { int max_size; HANDLE hcom, hrecv, hsend; OVERLAPPED orecv; BOOL fpipe; DWORD len; /* Protected by the CharDriverState chr_write_lock. */ OVERLAPPED osend; } WinCharState; typedef struct { HANDLE hStdIn; HANDLE hInputReadyEvent; HANDLE hInputDoneEvent; HANDLE hInputThread; uint8_t win_stdio_buf; } WinStdioCharState; #define NSENDBUF 2048 #define NRECVBUF 2048 #define MAXCONNECT 1 #define NTIMEOUT 5000 static int win_chr_poll(void *opaque); static int win_chr_pipe_poll(void *opaque); static void win_chr_close(CharDriverState *chr) { WinCharState *s = chr->opaque; if (s->hsend) { CloseHandle(s->hsend); s->hsend = NULL; } if (s->hrecv) { CloseHandle(s->hrecv); s->hrecv = NULL; } if (s->hcom) { CloseHandle(s->hcom); s->hcom = NULL; } if (s->fpipe) qemu_del_polling_cb(win_chr_pipe_poll, chr); else qemu_del_polling_cb(win_chr_poll, chr); qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } static int win_chr_init(CharDriverState *chr, const char *filename, Error **errp) { WinCharState *s = chr->opaque; COMMCONFIG comcfg; COMMTIMEOUTS cto = { 0, 0, 0, 0, 0}; COMSTAT comstat; DWORD size; DWORD err; s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); if (!s->hsend) { error_setg(errp, "Failed CreateEvent"); goto fail; } s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); if (!s->hrecv) { error_setg(errp, "Failed CreateEvent"); goto fail; } s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); if (s->hcom == INVALID_HANDLE_VALUE) { error_setg(errp, "Failed CreateFile (%lu)", GetLastError()); s->hcom = NULL; goto fail; } if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) { error_setg(errp, "Failed SetupComm"); goto fail; } ZeroMemory(&comcfg, sizeof(COMMCONFIG)); size = sizeof(COMMCONFIG); GetDefaultCommConfig(filename, &comcfg, &size); comcfg.dcb.DCBlength = sizeof(DCB); CommConfigDialog(filename, NULL, &comcfg); if (!SetCommState(s->hcom, &comcfg.dcb)) { error_setg(errp, "Failed SetCommState"); goto fail; } if (!SetCommMask(s->hcom, EV_ERR)) { error_setg(errp, "Failed SetCommMask"); goto fail; } cto.ReadIntervalTimeout = MAXDWORD; if (!SetCommTimeouts(s->hcom, &cto)) { error_setg(errp, "Failed SetCommTimeouts"); goto fail; } if (!ClearCommError(s->hcom, &err, &comstat)) { error_setg(errp, "Failed ClearCommError"); goto fail; } qemu_add_polling_cb(win_chr_poll, chr); return 0; fail: win_chr_close(chr); return -1; } /* Called with chr_write_lock held. */ static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1) { WinCharState *s = chr->opaque; DWORD len, ret, size, err; len = len1; ZeroMemory(&s->osend, sizeof(s->osend)); s->osend.hEvent = s->hsend; while (len > 0) { if (s->hsend) ret = WriteFile(s->hcom, buf, len, &size, &s->osend); else ret = WriteFile(s->hcom, buf, len, &size, NULL); if (!ret) { err = GetLastError(); if (err == ERROR_IO_PENDING) { ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE); if (ret) { buf += size; len -= size; } else { break; } } else { break; } } else { buf += size; len -= size; } } return len1 - len; } static int win_chr_read_poll(CharDriverState *chr) { WinCharState *s = chr->opaque; s->max_size = qemu_chr_be_can_write(chr); return s->max_size; } static void win_chr_readfile(CharDriverState *chr) { WinCharState *s = chr->opaque; int ret, err; uint8_t buf[READ_BUF_LEN]; DWORD size; ZeroMemory(&s->orecv, sizeof(s->orecv)); s->orecv.hEvent = s->hrecv; ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv); if (!ret) { err = GetLastError(); if (err == ERROR_IO_PENDING) { ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE); } } if (size > 0) { qemu_chr_be_write(chr, buf, size); } } static void win_chr_read(CharDriverState *chr) { WinCharState *s = chr->opaque; if (s->len > s->max_size) s->len = s->max_size; if (s->len == 0) return; win_chr_readfile(chr); } static int win_chr_poll(void *opaque) { CharDriverState *chr = opaque; WinCharState *s = chr->opaque; COMSTAT status; DWORD comerr; ClearCommError(s->hcom, &comerr, &status); if (status.cbInQue > 0) { s->len = status.cbInQue; win_chr_read_poll(chr); win_chr_read(chr); return 1; } return 0; } static CharDriverState *qemu_chr_open_win_path(const char *filename, ChardevCommon *backend, Error **errp) { CharDriverState *chr; WinCharState *s; chr = qemu_chr_alloc(backend, errp); if (!chr) { return NULL; } s = g_new0(WinCharState, 1); chr->opaque = s; chr->chr_write = win_chr_write; chr->chr_close = win_chr_close; if (win_chr_init(chr, filename, errp) < 0) { g_free(s); qemu_chr_free_common(chr); return NULL; } return chr; } static int win_chr_pipe_poll(void *opaque) { CharDriverState *chr = opaque; WinCharState *s = chr->opaque; DWORD size; PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL); if (size > 0) { s->len = size; win_chr_read_poll(chr); win_chr_read(chr); return 1; } return 0; } static int win_chr_pipe_init(CharDriverState *chr, const char *filename, Error **errp) { WinCharState *s = chr->opaque; OVERLAPPED ov; int ret; DWORD size; char *openname; s->fpipe = TRUE; s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); if (!s->hsend) { error_setg(errp, "Failed CreateEvent"); goto fail; } s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); if (!s->hrecv) { error_setg(errp, "Failed CreateEvent"); goto fail; } openname = g_strdup_printf("\\\\.\\pipe\\%s", filename); s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT, MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL); g_free(openname); if (s->hcom == INVALID_HANDLE_VALUE) { error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError()); s->hcom = NULL; goto fail; } ZeroMemory(&ov, sizeof(ov)); ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); ret = ConnectNamedPipe(s->hcom, &ov); if (ret) { error_setg(errp, "Failed ConnectNamedPipe"); goto fail; } ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE); if (!ret) { error_setg(errp, "Failed GetOverlappedResult"); if (ov.hEvent) { CloseHandle(ov.hEvent); ov.hEvent = NULL; } goto fail; } if (ov.hEvent) { CloseHandle(ov.hEvent); ov.hEvent = NULL; } qemu_add_polling_cb(win_chr_pipe_poll, chr); return 0; fail: win_chr_close(chr); return -1; } static CharDriverState *qemu_chr_open_pipe(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevHostdev *opts = backend->u.pipe.data; const char *filename = opts->device; CharDriverState *chr; WinCharState *s; ChardevCommon *common = qapi_ChardevHostdev_base(opts); chr = qemu_chr_alloc(common, errp); if (!chr) { return NULL; } s = g_new0(WinCharState, 1); chr->opaque = s; chr->chr_write = win_chr_write; chr->chr_close = win_chr_close; if (win_chr_pipe_init(chr, filename, errp) < 0) { g_free(s); qemu_chr_free_common(chr); return NULL; } return chr; } static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out, ChardevCommon *backend, Error **errp) { CharDriverState *chr; WinCharState *s; chr = qemu_chr_alloc(backend, errp); if (!chr) { return NULL; } s = g_new0(WinCharState, 1); s->hcom = fd_out; chr->opaque = s; chr->chr_write = win_chr_write; return chr; } static CharDriverState *qemu_chr_open_win_con(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevCommon *common = backend->u.console.data; return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE), common, errp); } static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len) { HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE); DWORD dwSize; int len1; len1 = len; while (len1 > 0) { if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) { break; } buf += dwSize; len1 -= dwSize; } return len - len1; } static void win_stdio_wait_func(void *opaque) { CharDriverState *chr = opaque; WinStdioCharState *stdio = chr->opaque; INPUT_RECORD buf[4]; int ret; DWORD dwSize; int i; ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize); if (!ret) { /* Avoid error storm */ qemu_del_wait_object(stdio->hStdIn, NULL, NULL); return; } for (i = 0; i < dwSize; i++) { KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent; if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) { int j; if (kev->uChar.AsciiChar != 0) { for (j = 0; j < kev->wRepeatCount; j++) { if (qemu_chr_be_can_write(chr)) { uint8_t c = kev->uChar.AsciiChar; qemu_chr_be_write(chr, &c, 1); } } } } } } static DWORD WINAPI win_stdio_thread(LPVOID param) { CharDriverState *chr = param; WinStdioCharState *stdio = chr->opaque; int ret; DWORD dwSize; while (1) { /* Wait for one byte */ ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL); /* Exit in case of error, continue if nothing read */ if (!ret) { break; } if (!dwSize) { continue; } /* Some terminal emulator returns \r\n for Enter, just pass \n */ if (stdio->win_stdio_buf == '\r') { continue; } /* Signal the main thread and wait until the byte was eaten */ if (!SetEvent(stdio->hInputReadyEvent)) { break; } if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE) != WAIT_OBJECT_0) { break; } } qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL); return 0; } static void win_stdio_thread_wait_func(void *opaque) { CharDriverState *chr = opaque; WinStdioCharState *stdio = chr->opaque; if (qemu_chr_be_can_write(chr)) { qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1); } SetEvent(stdio->hInputDoneEvent); } static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo) { WinStdioCharState *stdio = chr->opaque; DWORD dwMode = 0; GetConsoleMode(stdio->hStdIn, &dwMode); if (echo) { SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT); } else { SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT); } } static void win_stdio_close(CharDriverState *chr) { WinStdioCharState *stdio = chr->opaque; if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) { CloseHandle(stdio->hInputReadyEvent); } if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) { CloseHandle(stdio->hInputDoneEvent); } if (stdio->hInputThread != INVALID_HANDLE_VALUE) { TerminateThread(stdio->hInputThread, 0); } g_free(chr->opaque); } static CharDriverState *qemu_chr_open_stdio(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { CharDriverState *chr; WinStdioCharState *stdio; DWORD dwMode; int is_console = 0; ChardevCommon *common = qapi_ChardevStdio_base(backend->u.stdio.data); chr = qemu_chr_alloc(common, errp); if (!chr) { return NULL; } stdio = g_new0(WinStdioCharState, 1); stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE); if (stdio->hStdIn == INVALID_HANDLE_VALUE) { error_setg(errp, "cannot open stdio: invalid handle"); return NULL; } is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0; chr->opaque = stdio; chr->chr_write = win_stdio_write; chr->chr_close = win_stdio_close; if (is_console) { if (qemu_add_wait_object(stdio->hStdIn, win_stdio_wait_func, chr)) { error_setg(errp, "qemu_add_wait_object: failed"); goto err1; } } else { DWORD dwId; stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL); stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL); if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) { error_setg(errp, "cannot create event"); goto err2; } if (qemu_add_wait_object(stdio->hInputReadyEvent, win_stdio_thread_wait_func, chr)) { error_setg(errp, "qemu_add_wait_object: failed"); goto err2; } stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread, chr, 0, &dwId); if (stdio->hInputThread == INVALID_HANDLE_VALUE) { error_setg(errp, "cannot create stdio thread"); goto err3; } } dwMode |= ENABLE_LINE_INPUT; if (is_console) { /* set the terminal in raw mode */ /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */ dwMode |= ENABLE_PROCESSED_INPUT; } SetConsoleMode(stdio->hStdIn, dwMode); chr->chr_set_echo = qemu_chr_set_echo_win_stdio; qemu_chr_fe_set_echo(chr, false); return chr; err3: qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL); err2: CloseHandle(stdio->hInputReadyEvent); CloseHandle(stdio->hInputDoneEvent); err1: qemu_del_wait_object(stdio->hStdIn, NULL, NULL); return NULL; } #endif /* !_WIN32 */ /***********************************************************/ /* UDP Net console */ typedef struct { QIOChannel *ioc; uint8_t buf[READ_BUF_LEN]; int bufcnt; int bufptr; int max_size; } NetCharDriver; /* Called with chr_write_lock held. */ static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { NetCharDriver *s = chr->opaque; return qio_channel_write( s->ioc, (const char *)buf, len, NULL); } static int udp_chr_read_poll(void *opaque) { CharDriverState *chr = opaque; NetCharDriver *s = chr->opaque; s->max_size = qemu_chr_be_can_write(chr); /* If there were any stray characters in the queue process them * first */ while (s->max_size > 0 && s->bufptr < s->bufcnt) { qemu_chr_be_write(chr, &s->buf[s->bufptr], 1); s->bufptr++; s->max_size = qemu_chr_be_can_write(chr); } return s->max_size; } static gboolean udp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) { CharDriverState *chr = opaque; NetCharDriver *s = chr->opaque; ssize_t ret; if (s->max_size == 0) { return TRUE; } ret = qio_channel_read( s->ioc, (char *)s->buf, sizeof(s->buf), NULL); if (ret <= 0) { remove_fd_in_watch(chr); return FALSE; } s->bufcnt = ret; s->bufptr = 0; while (s->max_size > 0 && s->bufptr < s->bufcnt) { qemu_chr_be_write(chr, &s->buf[s->bufptr], 1); s->bufptr++; s->max_size = qemu_chr_be_can_write(chr); } return TRUE; } static void udp_chr_update_read_handler(CharDriverState *chr, GMainContext *context) { NetCharDriver *s = chr->opaque; remove_fd_in_watch(chr); if (s->ioc) { chr->fd_in_tag = io_add_watch_poll(s->ioc, udp_chr_read_poll, udp_chr_read, chr, context); } } static void udp_chr_close(CharDriverState *chr) { NetCharDriver *s = chr->opaque; remove_fd_in_watch(chr); if (s->ioc) { object_unref(OBJECT(s->ioc)); } g_free(s); qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } static CharDriverState *qemu_chr_open_udp(QIOChannelSocket *sioc, ChardevCommon *backend, Error **errp) { CharDriverState *chr = NULL; NetCharDriver *s = NULL; chr = qemu_chr_alloc(backend, errp); if (!chr) { return NULL; } s = g_new0(NetCharDriver, 1); s->ioc = QIO_CHANNEL(sioc); s->bufcnt = 0; s->bufptr = 0; chr->opaque = s; chr->chr_write = udp_chr_write; chr->chr_update_read_handler = udp_chr_update_read_handler; chr->chr_close = udp_chr_close; /* be isn't opened until we get a connection */ chr->explicit_be_open = true; return chr; } /***********************************************************/ /* TCP Net console */ typedef struct { QIOChannel *ioc; /* Client I/O channel */ QIOChannelSocket *sioc; /* Client master channel */ QIOChannelSocket *listen_ioc; guint listen_tag; QCryptoTLSCreds *tls_creds; int connected; int max_size; int do_telnetopt; int do_nodelay; int is_unix; int *read_msgfds; size_t read_msgfds_num; int *write_msgfds; size_t write_msgfds_num; SocketAddress *addr; bool is_listen; bool is_telnet; guint reconnect_timer; int64_t reconnect_time; bool connect_err_reported; } TCPCharDriver; static gboolean socket_reconnect_timeout(gpointer opaque); static void qemu_chr_socket_restart_timer(CharDriverState *chr) { TCPCharDriver *s = chr->opaque; assert(s->connected == 0); s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time, socket_reconnect_timeout, chr); } static void check_report_connect_error(CharDriverState *chr, Error *err) { TCPCharDriver *s = chr->opaque; if (!s->connect_err_reported) { error_report("Unable to connect character device %s: %s", chr->label, error_get_pretty(err)); s->connect_err_reported = true; } qemu_chr_socket_restart_timer(chr); } static gboolean tcp_chr_accept(QIOChannel *chan, GIOCondition cond, void *opaque); /* Called with chr_write_lock held. */ static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { TCPCharDriver *s = chr->opaque; if (s->connected) { int ret = io_channel_send_full(s->ioc, buf, len, s->write_msgfds, s->write_msgfds_num); /* free the written msgfds, no matter what */ if (s->write_msgfds_num) { g_free(s->write_msgfds); s->write_msgfds = 0; s->write_msgfds_num = 0; } return ret; } else { /* XXX: indicate an error ? */ return len; } } static int tcp_chr_read_poll(void *opaque) { CharDriverState *chr = opaque; TCPCharDriver *s = chr->opaque; if (!s->connected) return 0; s->max_size = qemu_chr_be_can_write(chr); return s->max_size; } #define IAC 255 #define IAC_BREAK 243 static void tcp_chr_process_IAC_bytes(CharDriverState *chr, TCPCharDriver *s, uint8_t *buf, int *size) { /* Handle any telnet client's basic IAC options to satisfy char by * char mode with no echo. All IAC options will be removed from * the buf and the do_telnetopt variable will be used to track the * state of the width of the IAC information. * * IAC commands come in sets of 3 bytes with the exception of the * "IAC BREAK" command and the double IAC. */ int i; int j = 0; for (i = 0; i < *size; i++) { if (s->do_telnetopt > 1) { if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) { /* Double IAC means send an IAC */ if (j != i) buf[j] = buf[i]; j++; s->do_telnetopt = 1; } else { if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) { /* Handle IAC break commands by sending a serial break */ qemu_chr_be_event(chr, CHR_EVENT_BREAK); s->do_telnetopt++; } s->do_telnetopt++; } if (s->do_telnetopt >= 4) { s->do_telnetopt = 1; } } else { if ((unsigned char)buf[i] == IAC) { s->do_telnetopt = 2; } else { if (j != i) buf[j] = buf[i]; j++; } } } *size = j; } static int tcp_get_msgfds(CharDriverState *chr, int *fds, int num) { TCPCharDriver *s = chr->opaque; int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num; assert(num <= TCP_MAX_FDS); if (to_copy) { int i; memcpy(fds, s->read_msgfds, to_copy * sizeof(int)); /* Close unused fds */ for (i = to_copy; i < s->read_msgfds_num; i++) { close(s->read_msgfds[i]); } g_free(s->read_msgfds); s->read_msgfds = 0; s->read_msgfds_num = 0; } return to_copy; } static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num) { TCPCharDriver *s = chr->opaque; /* clear old pending fd array */ g_free(s->write_msgfds); s->write_msgfds = NULL; s->write_msgfds_num = 0; if (!s->connected || !qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { return -1; } if (num) { s->write_msgfds = g_new(int, num); memcpy(s->write_msgfds, fds, num * sizeof(int)); } s->write_msgfds_num = num; return 0; } static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len) { TCPCharDriver *s = chr->opaque; struct iovec iov = { .iov_base = buf, .iov_len = len }; int ret; size_t i; int *msgfds = NULL; size_t msgfds_num = 0; if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) { ret = qio_channel_readv_full(s->ioc, &iov, 1, &msgfds, &msgfds_num, NULL); } else { ret = qio_channel_readv_full(s->ioc, &iov, 1, NULL, NULL, NULL); } if (ret == QIO_CHANNEL_ERR_BLOCK) { errno = EAGAIN; ret = -1; } else if (ret == -1) { errno = EIO; } if (msgfds_num) { /* close and clean read_msgfds */ for (i = 0; i < s->read_msgfds_num; i++) { close(s->read_msgfds[i]); } if (s->read_msgfds_num) { g_free(s->read_msgfds); } s->read_msgfds = msgfds; s->read_msgfds_num = msgfds_num; } for (i = 0; i < s->read_msgfds_num; i++) { int fd = s->read_msgfds[i]; if (fd < 0) { continue; } /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ qemu_set_block(fd); #ifndef MSG_CMSG_CLOEXEC qemu_set_cloexec(fd); #endif } return ret; } static GSource *tcp_chr_add_watch(CharDriverState *chr, GIOCondition cond) { TCPCharDriver *s = chr->opaque; return qio_channel_create_watch(s->ioc, cond); } static void tcp_chr_free_connection(CharDriverState *chr) { TCPCharDriver *s = chr->opaque; int i; if (!s->connected) { return; } if (s->read_msgfds_num) { for (i = 0; i < s->read_msgfds_num; i++) { close(s->read_msgfds[i]); } g_free(s->read_msgfds); s->read_msgfds = NULL; s->read_msgfds_num = 0; } tcp_set_msgfds(chr, NULL, 0); remove_fd_in_watch(chr); object_unref(OBJECT(s->sioc)); s->sioc = NULL; object_unref(OBJECT(s->ioc)); s->ioc = NULL; g_free(chr->filename); chr->filename = NULL; s->connected = 0; } static void tcp_chr_disconnect(CharDriverState *chr) { TCPCharDriver *s = chr->opaque; if (!s->connected) { return; } tcp_chr_free_connection(chr); if (s->listen_ioc) { s->listen_tag = qio_channel_add_watch( QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL); } chr->filename = SocketAddress_to_str("disconnected:", s->addr, s->is_listen, s->is_telnet); qemu_chr_be_event(chr, CHR_EVENT_CLOSED); if (s->reconnect_time) { qemu_chr_socket_restart_timer(chr); } } static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) { CharDriverState *chr = opaque; TCPCharDriver *s = chr->opaque; uint8_t buf[READ_BUF_LEN]; int len, size; if (!s->connected || s->max_size <= 0) { return TRUE; } len = sizeof(buf); if (len > s->max_size) len = s->max_size; size = tcp_chr_recv(chr, (void *)buf, len); if (size == 0 || size == -1) { /* connection closed */ tcp_chr_disconnect(chr); } else if (size > 0) { if (s->do_telnetopt) tcp_chr_process_IAC_bytes(chr, s, buf, &size); if (size > 0) qemu_chr_be_write(chr, buf, size); } return TRUE; } static int tcp_chr_sync_read(CharDriverState *chr, const uint8_t *buf, int len) { TCPCharDriver *s = chr->opaque; int size; if (!s->connected) { return 0; } size = tcp_chr_recv(chr, (void *) buf, len); if (size == 0) { /* connection closed */ tcp_chr_disconnect(chr); } return size; } static void tcp_chr_connect(void *opaque) { CharDriverState *chr = opaque; TCPCharDriver *s = chr->opaque; g_free(chr->filename); chr->filename = sockaddr_to_str( &s->sioc->localAddr, s->sioc->localAddrLen, &s->sioc->remoteAddr, s->sioc->remoteAddrLen, s->is_listen, s->is_telnet); s->connected = 1; if (s->ioc) { chr->fd_in_tag = io_add_watch_poll(s->ioc, tcp_chr_read_poll, tcp_chr_read, chr, NULL); } qemu_chr_be_generic_open(chr); } static void tcp_chr_update_read_handler(CharDriverState *chr, GMainContext *context) { TCPCharDriver *s = chr->opaque; if (!s->connected) { return; } remove_fd_in_watch(chr); if (s->ioc) { chr->fd_in_tag = io_add_watch_poll(s->ioc, tcp_chr_read_poll, tcp_chr_read, chr, context); } } typedef struct { CharDriverState *chr; char buf[12]; size_t buflen; } TCPCharDriverTelnetInit; static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc, GIOCondition cond G_GNUC_UNUSED, gpointer user_data) { TCPCharDriverTelnetInit *init = user_data; ssize_t ret; ret = qio_channel_write(ioc, init->buf, init->buflen, NULL); if (ret < 0) { if (ret == QIO_CHANNEL_ERR_BLOCK) { ret = 0; } else { tcp_chr_disconnect(init->chr); return FALSE; } } init->buflen -= ret; if (init->buflen == 0) { tcp_chr_connect(init->chr); return FALSE; } memmove(init->buf, init->buf + ret, init->buflen); return TRUE; } static void tcp_chr_telnet_init(CharDriverState *chr) { TCPCharDriver *s = chr->opaque; TCPCharDriverTelnetInit *init = g_new0(TCPCharDriverTelnetInit, 1); size_t n = 0; init->chr = chr; init->buflen = 12; #define IACSET(x, a, b, c) \ do { \ x[n++] = a; \ x[n++] = b; \ x[n++] = c; \ } while (0) /* Prep the telnet negotion to put telnet in binary, * no echo, single char mode */ IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */ IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */ IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */ IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */ #undef IACSET qio_channel_add_watch( s->ioc, G_IO_OUT, tcp_chr_telnet_init_io, init, NULL); } static void tcp_chr_tls_handshake(Object *source, Error *err, gpointer user_data) { CharDriverState *chr = user_data; TCPCharDriver *s = chr->opaque; if (err) { tcp_chr_disconnect(chr); } else { if (s->do_telnetopt) { tcp_chr_telnet_init(chr); } else { tcp_chr_connect(chr); } } } static void tcp_chr_tls_init(CharDriverState *chr) { TCPCharDriver *s = chr->opaque; QIOChannelTLS *tioc; Error *err = NULL; if (s->is_listen) { tioc = qio_channel_tls_new_server( s->ioc, s->tls_creds, NULL, /* XXX Use an ACL */ &err); } else { tioc = qio_channel_tls_new_client( s->ioc, s->tls_creds, s->addr->u.inet.data->host, &err); } if (tioc == NULL) { error_free(err); tcp_chr_disconnect(chr); return; } object_unref(OBJECT(s->ioc)); s->ioc = QIO_CHANNEL(tioc); qio_channel_tls_handshake(tioc, tcp_chr_tls_handshake, chr, NULL); } static int tcp_chr_new_client(CharDriverState *chr, QIOChannelSocket *sioc) { TCPCharDriver *s = chr->opaque; if (s->ioc != NULL) { return -1; } s->ioc = QIO_CHANNEL(sioc); object_ref(OBJECT(sioc)); s->sioc = sioc; object_ref(OBJECT(sioc)); qio_channel_set_blocking(s->ioc, false, NULL); if (s->do_nodelay) { qio_channel_set_delay(s->ioc, false); } if (s->listen_tag) { g_source_remove(s->listen_tag); s->listen_tag = 0; } if (s->tls_creds) { tcp_chr_tls_init(chr); } else { if (s->do_telnetopt) { tcp_chr_telnet_init(chr); } else { tcp_chr_connect(chr); } } return 0; } static int tcp_chr_add_client(CharDriverState *chr, int fd) { int ret; QIOChannelSocket *sioc; sioc = qio_channel_socket_new_fd(fd, NULL); if (!sioc) { return -1; } ret = tcp_chr_new_client(chr, sioc); object_unref(OBJECT(sioc)); return ret; } static gboolean tcp_chr_accept(QIOChannel *channel, GIOCondition cond, void *opaque) { CharDriverState *chr = opaque; QIOChannelSocket *sioc; sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(channel), NULL); if (!sioc) { return TRUE; } tcp_chr_new_client(chr, sioc); object_unref(OBJECT(sioc)); return TRUE; } static int tcp_chr_wait_connected(CharDriverState *chr, Error **errp) { TCPCharDriver *s = chr->opaque; QIOChannelSocket *sioc; /* It can't wait on s->connected, since it is set asynchronously * in TLS and telnet cases, only wait for an accepted socket */ while (!s->ioc) { if (s->is_listen) { fprintf(stderr, "QEMU waiting for connection on: %s\n", chr->filename); qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), true, NULL); tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr); qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL); } else { sioc = qio_channel_socket_new(); if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) { object_unref(OBJECT(sioc)); return -1; } tcp_chr_new_client(chr, sioc); object_unref(OBJECT(sioc)); } } return 0; } int qemu_chr_wait_connected(CharDriverState *chr, Error **errp) { if (chr->chr_wait_connected) { return chr->chr_wait_connected(chr, errp); } return 0; } static void tcp_chr_close(CharDriverState *chr) { TCPCharDriver *s = chr->opaque; tcp_chr_free_connection(chr); if (s->reconnect_timer) { g_source_remove(s->reconnect_timer); s->reconnect_timer = 0; } qapi_free_SocketAddress(s->addr); if (s->listen_tag) { g_source_remove(s->listen_tag); s->listen_tag = 0; } if (s->listen_ioc) { object_unref(OBJECT(s->listen_ioc)); } if (s->tls_creds) { object_unref(OBJECT(s->tls_creds)); } g_free(s); qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } static void qemu_chr_socket_connected(Object *src, Error *err, void *opaque) { QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(src); CharDriverState *chr = opaque; TCPCharDriver *s = chr->opaque; if (err) { check_report_connect_error(chr, err); object_unref(src); return; } s->connect_err_reported = false; tcp_chr_new_client(chr, sioc); object_unref(OBJECT(sioc)); } /*********************************************************/ /* Ring buffer chardev */ typedef struct { size_t size; size_t prod; size_t cons; uint8_t *cbuf; } RingBufCharDriver; static size_t ringbuf_count(const CharDriverState *chr) { const RingBufCharDriver *d = chr->opaque; return d->prod - d->cons; } /* Called with chr_write_lock held. */ static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { RingBufCharDriver *d = chr->opaque; int i; if (!buf || (len < 0)) { return -1; } for (i = 0; i < len; i++ ) { d->cbuf[d->prod++ & (d->size - 1)] = buf[i]; if (d->prod - d->cons > d->size) { d->cons = d->prod - d->size; } } return len; } static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len) { RingBufCharDriver *d = chr->opaque; int i; qemu_mutex_lock(&chr->chr_write_lock); for (i = 0; i < len && d->cons != d->prod; i++) { buf[i] = d->cbuf[d->cons++ & (d->size - 1)]; } qemu_mutex_unlock(&chr->chr_write_lock); return i; } static void ringbuf_chr_close(struct CharDriverState *chr) { RingBufCharDriver *d = chr->opaque; g_free(d->cbuf); g_free(d); chr->opaque = NULL; } static CharDriverState *qemu_chr_open_ringbuf(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevRingbuf *opts = backend->u.ringbuf.data; ChardevCommon *common = qapi_ChardevRingbuf_base(opts); CharDriverState *chr; RingBufCharDriver *d; chr = qemu_chr_alloc(common, errp); if (!chr) { return NULL; } d = g_malloc(sizeof(*d)); d->size = opts->has_size ? opts->size : 65536; /* The size must be power of 2 */ if (d->size & (d->size - 1)) { error_setg(errp, "size of ringbuf chardev must be power of two"); goto fail; } d->prod = 0; d->cons = 0; d->cbuf = g_malloc0(d->size); chr->opaque = d; chr->chr_write = ringbuf_chr_write; chr->chr_close = ringbuf_chr_close; return chr; fail: g_free(d); qemu_chr_free_common(chr); return NULL; } bool chr_is_ringbuf(const CharDriverState *chr) { return chr->chr_write == ringbuf_chr_write; } void qmp_ringbuf_write(const char *device, const char *data, bool has_format, enum DataFormat format, Error **errp) { CharDriverState *chr; const uint8_t *write_data; int ret; gsize write_count; chr = qemu_chr_find(device); if (!chr) { error_setg(errp, "Device '%s' not found", device); return; } if (!chr_is_ringbuf(chr)) { error_setg(errp,"%s is not a ringbuf device", device); return; } if (has_format && (format == DATA_FORMAT_BASE64)) { write_data = qbase64_decode(data, -1, &write_count, errp); if (!write_data) { return; } } else { write_data = (uint8_t *)data; write_count = strlen(data); } ret = ringbuf_chr_write(chr, write_data, write_count); if (write_data != (uint8_t *)data) { g_free((void *)write_data); } if (ret < 0) { error_setg(errp, "Failed to write to device %s", device); return; } } char *qmp_ringbuf_read(const char *device, int64_t size, bool has_format, enum DataFormat format, Error **errp) { CharDriverState *chr; uint8_t *read_data; size_t count; char *data; chr = qemu_chr_find(device); if (!chr) { error_setg(errp, "Device '%s' not found", device); return NULL; } if (!chr_is_ringbuf(chr)) { error_setg(errp,"%s is not a ringbuf device", device); return NULL; } if (size <= 0) { error_setg(errp, "size must be greater than zero"); return NULL; } count = ringbuf_count(chr); size = size > count ? count : size; read_data = g_malloc(size + 1); ringbuf_chr_read(chr, read_data, size); if (has_format && (format == DATA_FORMAT_BASE64)) { data = g_base64_encode(read_data, size); g_free(read_data); } else { /* * FIXME should read only complete, valid UTF-8 characters up * to @size bytes. Invalid sequences should be replaced by a * suitable replacement character. Except when (and only * when) ring buffer lost characters since last read, initial * continuation characters should be dropped. */ read_data[size] = 0; data = (char *)read_data; } return data; } QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename) { char host[65], port[33], width[8], height[8]; int pos; const char *p; QemuOpts *opts; Error *local_err = NULL; opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err); if (local_err) { error_report_err(local_err); return NULL; } if (strstart(filename, "mon:", &p)) { filename = p; qemu_opt_set(opts, "mux", "on", &error_abort); if (strcmp(filename, "stdio") == 0) { /* Monitor is muxed to stdio: do not exit on Ctrl+C by default * but pass it to the guest. Handle this only for compat syntax, * for -chardev syntax we have special option for this. * This is what -nographic did, redirecting+muxing serial+monitor * to stdio causing Ctrl+C to be passed to guest. */ qemu_opt_set(opts, "signal", "off", &error_abort); } } if (strcmp(filename, "null") == 0 || strcmp(filename, "pty") == 0 || strcmp(filename, "msmouse") == 0 || strcmp(filename, "braille") == 0 || strcmp(filename, "testdev") == 0 || strcmp(filename, "stdio") == 0) { qemu_opt_set(opts, "backend", filename, &error_abort); return opts; } if (strstart(filename, "vc", &p)) { qemu_opt_set(opts, "backend", "vc", &error_abort); if (*p == ':') { if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) { /* pixels */ qemu_opt_set(opts, "width", width, &error_abort); qemu_opt_set(opts, "height", height, &error_abort); } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) { /* chars */ qemu_opt_set(opts, "cols", width, &error_abort); qemu_opt_set(opts, "rows", height, &error_abort); } else { goto fail; } } return opts; } if (strcmp(filename, "con:") == 0) { qemu_opt_set(opts, "backend", "console", &error_abort); return opts; } if (strstart(filename, "COM", NULL)) { qemu_opt_set(opts, "backend", "serial", &error_abort); qemu_opt_set(opts, "path", filename, &error_abort); return opts; } if (strstart(filename, "file:", &p)) { qemu_opt_set(opts, "backend", "file", &error_abort); qemu_opt_set(opts, "path", p, &error_abort); return opts; } if (strstart(filename, "pipe:", &p)) { qemu_opt_set(opts, "backend", "pipe", &error_abort); qemu_opt_set(opts, "path", p, &error_abort); return opts; } if (strstart(filename, "tcp:", &p) || strstart(filename, "telnet:", &p)) { if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) { host[0] = 0; if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) goto fail; } qemu_opt_set(opts, "backend", "socket", &error_abort); qemu_opt_set(opts, "host", host, &error_abort); qemu_opt_set(opts, "port", port, &error_abort); if (p[pos] == ',') { qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err); if (local_err) { error_report_err(local_err); goto fail; } } if (strstart(filename, "telnet:", &p)) qemu_opt_set(opts, "telnet", "on", &error_abort); return opts; } if (strstart(filename, "udp:", &p)) { qemu_opt_set(opts, "backend", "udp", &error_abort); if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) { host[0] = 0; if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) { goto fail; } } qemu_opt_set(opts, "host", host, &error_abort); qemu_opt_set(opts, "port", port, &error_abort); if (p[pos] == '@') { p += pos + 1; if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) { host[0] = 0; if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) { goto fail; } } qemu_opt_set(opts, "localaddr", host, &error_abort); qemu_opt_set(opts, "localport", port, &error_abort); } return opts; } if (strstart(filename, "unix:", &p)) { qemu_opt_set(opts, "backend", "socket", &error_abort); qemu_opts_do_parse(opts, p, "path", &local_err); if (local_err) { error_report_err(local_err); goto fail; } return opts; } if (strstart(filename, "/dev/parport", NULL) || strstart(filename, "/dev/ppi", NULL)) { qemu_opt_set(opts, "backend", "parport", &error_abort); qemu_opt_set(opts, "path", filename, &error_abort); return opts; } if (strstart(filename, "/dev/", NULL)) { qemu_opt_set(opts, "backend", "tty", &error_abort); qemu_opt_set(opts, "path", filename, &error_abort); return opts; } fail: qemu_opts_del(opts); return NULL; } void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend) { const char *logfile = qemu_opt_get(opts, "logfile"); backend->has_logfile = logfile != NULL; backend->logfile = logfile ? g_strdup(logfile) : NULL; backend->has_logappend = true; backend->logappend = qemu_opt_get_bool(opts, "logappend", false); } static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *path = qemu_opt_get(opts, "path"); ChardevFile *file; if (path == NULL) { error_setg(errp, "chardev: file: no filename given"); return; } file = backend->u.file.data = g_new0(ChardevFile, 1); qemu_chr_parse_common(opts, qapi_ChardevFile_base(file)); file->out = g_strdup(path); file->has_append = true; file->append = qemu_opt_get_bool(opts, "append", false); } static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend, Error **errp) { ChardevStdio *stdio; stdio = backend->u.stdio.data = g_new0(ChardevStdio, 1); qemu_chr_parse_common(opts, qapi_ChardevStdio_base(stdio)); stdio->has_signal = true; stdio->signal = qemu_opt_get_bool(opts, "signal", true); } #ifdef HAVE_CHARDEV_SERIAL static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *device = qemu_opt_get(opts, "path"); ChardevHostdev *serial; if (device == NULL) { error_setg(errp, "chardev: serial/tty: no device path given"); return; } serial = backend->u.serial.data = g_new0(ChardevHostdev, 1); qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(serial)); serial->device = g_strdup(device); } #endif #ifdef HAVE_CHARDEV_PARPORT static void qemu_chr_parse_parallel(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *device = qemu_opt_get(opts, "path"); ChardevHostdev *parallel; if (device == NULL) { error_setg(errp, "chardev: parallel: no device path given"); return; } parallel = backend->u.parallel.data = g_new0(ChardevHostdev, 1); qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(parallel)); parallel->device = g_strdup(device); } #endif static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *device = qemu_opt_get(opts, "path"); ChardevHostdev *dev; if (device == NULL) { error_setg(errp, "chardev: pipe: no device path given"); return; } dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1); qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev)); dev->device = g_strdup(device); } static void qemu_chr_parse_ringbuf(QemuOpts *opts, ChardevBackend *backend, Error **errp) { int val; ChardevRingbuf *ringbuf; ringbuf = backend->u.ringbuf.data = g_new0(ChardevRingbuf, 1); qemu_chr_parse_common(opts, qapi_ChardevRingbuf_base(ringbuf)); val = qemu_opt_get_size(opts, "size", 0); if (val != 0) { ringbuf->has_size = true; ringbuf->size = val; } } static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *chardev = qemu_opt_get(opts, "chardev"); ChardevMux *mux; if (chardev == NULL) { error_setg(errp, "chardev: mux: no chardev given"); return; } mux = backend->u.mux.data = g_new0(ChardevMux, 1); qemu_chr_parse_common(opts, qapi_ChardevMux_base(mux)); mux->chardev = g_strdup(chardev); } static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend, Error **errp) { bool is_listen = qemu_opt_get_bool(opts, "server", false); bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true); bool is_telnet = qemu_opt_get_bool(opts, "telnet", false); bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true); int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0); const char *path = qemu_opt_get(opts, "path"); const char *host = qemu_opt_get(opts, "host"); const char *port = qemu_opt_get(opts, "port"); const char *tls_creds = qemu_opt_get(opts, "tls-creds"); SocketAddress *addr; ChardevSocket *sock; if (!path) { if (!host) { error_setg(errp, "chardev: socket: no host given"); return; } if (!port) { error_setg(errp, "chardev: socket: no port given"); return; } } else { if (tls_creds) { error_setg(errp, "TLS can only be used over TCP socket"); return; } } sock = backend->u.socket.data = g_new0(ChardevSocket, 1); qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock)); sock->has_nodelay = true; sock->nodelay = do_nodelay; sock->has_server = true; sock->server = is_listen; sock->has_telnet = true; sock->telnet = is_telnet; sock->has_wait = true; sock->wait = is_waitconnect; sock->has_reconnect = true; sock->reconnect = reconnect; sock->tls_creds = g_strdup(tls_creds); addr = g_new0(SocketAddress, 1); if (path) { UnixSocketAddress *q_unix; addr->type = SOCKET_ADDRESS_KIND_UNIX; q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1); q_unix->path = g_strdup(path); } else { addr->type = SOCKET_ADDRESS_KIND_INET; addr->u.inet.data = g_new(InetSocketAddress, 1); *addr->u.inet.data = (InetSocketAddress) { .host = g_strdup(host), .port = g_strdup(port), .has_to = qemu_opt_get(opts, "to"), .to = qemu_opt_get_number(opts, "to", 0), .has_ipv4 = qemu_opt_get(opts, "ipv4"), .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), .has_ipv6 = qemu_opt_get(opts, "ipv6"), .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), }; } sock->addr = addr; } static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *host = qemu_opt_get(opts, "host"); const char *port = qemu_opt_get(opts, "port"); const char *localaddr = qemu_opt_get(opts, "localaddr"); const char *localport = qemu_opt_get(opts, "localport"); bool has_local = false; SocketAddress *addr; ChardevUdp *udp; if (host == NULL || strlen(host) == 0) { host = "localhost"; } if (port == NULL || strlen(port) == 0) { error_setg(errp, "chardev: udp: remote port not specified"); return; } if (localport == NULL || strlen(localport) == 0) { localport = "0"; } else { has_local = true; } if (localaddr == NULL || strlen(localaddr) == 0) { localaddr = ""; } else { has_local = true; } udp = backend->u.udp.data = g_new0(ChardevUdp, 1); qemu_chr_parse_common(opts, qapi_ChardevUdp_base(udp)); addr = g_new0(SocketAddress, 1); addr->type = SOCKET_ADDRESS_KIND_INET; addr->u.inet.data = g_new(InetSocketAddress, 1); *addr->u.inet.data = (InetSocketAddress) { .host = g_strdup(host), .port = g_strdup(port), .has_ipv4 = qemu_opt_get(opts, "ipv4"), .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), .has_ipv6 = qemu_opt_get(opts, "ipv6"), .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), }; udp->remote = addr; if (has_local) { udp->has_local = true; addr = g_new0(SocketAddress, 1); addr->type = SOCKET_ADDRESS_KIND_INET; addr->u.inet.data = g_new(InetSocketAddress, 1); *addr->u.inet.data = (InetSocketAddress) { .host = g_strdup(localaddr), .port = g_strdup(localport), }; udp->local = addr; } } typedef struct CharDriver { const char *name; ChardevBackendKind kind; void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp); CharDriverState *(*create)(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp); } CharDriver; static GSList *backends; void register_char_driver(const char *name, ChardevBackendKind kind, void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp), CharDriverState *(*create)(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp)) { CharDriver *s; s = g_malloc0(sizeof(*s)); s->name = g_strdup(name); s->kind = kind; s->parse = parse; s->create = create; backends = g_slist_append(backends, s); } CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts, void (*init)(struct CharDriverState *s), Error **errp) { Error *local_err = NULL; CharDriver *cd; CharDriverState *chr; GSList *i; ChardevReturn *ret = NULL; ChardevBackend *backend; const char *id = qemu_opts_id(opts); char *bid = NULL; if (qemu_opt_get(opts, "backend") == NULL) { error_setg(errp, "chardev: \"%s\" missing backend", qemu_opts_id(opts)); goto err; } if (is_help_option(qemu_opt_get(opts, "backend"))) { fprintf(stderr, "Available chardev backend types:\n"); for (i = backends; i; i = i->next) { cd = i->data; fprintf(stderr, "%s\n", cd->name); } exit(!is_help_option(qemu_opt_get(opts, "backend"))); } if (id == NULL) { error_setg(errp, "chardev: no id specified"); goto err; } for (i = backends; i; i = i->next) { cd = i->data; if (strcmp(cd->name, qemu_opt_get(opts, "backend")) == 0) { break; } } if (i == NULL) { error_setg(errp, "chardev: backend \"%s\" not found", qemu_opt_get(opts, "backend")); goto err; } backend = g_new0(ChardevBackend, 1); if (qemu_opt_get_bool(opts, "mux", 0)) { bid = g_strdup_printf("%s-base", id); } chr = NULL; backend->type = cd->kind; if (cd->parse) { cd->parse(opts, backend, &local_err); if (local_err) { error_propagate(errp, local_err); goto qapi_out; } } else { ChardevCommon *cc = g_new0(ChardevCommon, 1); qemu_chr_parse_common(opts, cc); backend->u.null.data = cc; /* Any ChardevCommon member would work */ } ret = qmp_chardev_add(bid ? bid : id, backend, errp); if (!ret) { goto qapi_out; } if (bid) { qapi_free_ChardevBackend(backend); qapi_free_ChardevReturn(ret); backend = g_new0(ChardevBackend, 1); backend->u.mux.data = g_new0(ChardevMux, 1); backend->type = CHARDEV_BACKEND_KIND_MUX; backend->u.mux.data->chardev = g_strdup(bid); ret = qmp_chardev_add(id, backend, errp); if (!ret) { chr = qemu_chr_find(bid); qemu_chr_delete(chr); chr = NULL; goto qapi_out; } } chr = qemu_chr_find(id); qapi_out: qapi_free_ChardevBackend(backend); qapi_free_ChardevReturn(ret); g_free(bid); return chr; err: return NULL; } CharDriverState *qemu_chr_new_noreplay(const char *label, const char *filename, void (*init)(struct CharDriverState *s)) { const char *p; CharDriverState *chr; QemuOpts *opts; Error *err = NULL; if (strstart(filename, "chardev:", &p)) { return qemu_chr_find(p); } opts = qemu_chr_parse_compat(label, filename); if (!opts) return NULL; chr = qemu_chr_new_from_opts(opts, init, &err); if (err) { error_report_err(err); } if (chr && qemu_opt_get_bool(opts, "mux", 0)) { qemu_chr_fe_claim_no_fail(chr); monitor_init(chr, MONITOR_USE_READLINE); } qemu_opts_del(opts); return chr; } CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s)) { CharDriverState *chr; chr = qemu_chr_new_noreplay(label, filename, init); if (chr) { chr->replay = replay_mode != REPLAY_MODE_NONE; if (chr->replay && chr->chr_ioctl) { fprintf(stderr, "Replay: ioctl is not supported for serial devices yet\n"); } replay_register_char_driver(chr); } return chr; } void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo) { if (chr->chr_set_echo) { chr->chr_set_echo(chr, echo); } } void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open) { if (chr->fe_open == fe_open) { return; } chr->fe_open = fe_open; if (chr->chr_set_fe_open) { chr->chr_set_fe_open(chr, fe_open); } } void qemu_chr_fe_event(struct CharDriverState *chr, int event) { if (chr->chr_fe_event) { chr->chr_fe_event(chr, event); } } guint qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond, GIOFunc func, void *user_data) { GSource *src; guint tag; if (s->chr_add_watch == NULL) { return 0; } src = s->chr_add_watch(s, cond); if (!src) { return 0; } g_source_set_callback(src, (GSourceFunc)func, user_data, NULL); tag = g_source_attach(src, NULL); g_source_unref(src); return tag; } int qemu_chr_fe_claim(CharDriverState *s) { if (s->avail_connections < 1) { return -1; } s->avail_connections--; return 0; } void qemu_chr_fe_claim_no_fail(CharDriverState *s) { if (qemu_chr_fe_claim(s) != 0) { fprintf(stderr, "%s: error chardev \"%s\" already used\n", __func__, s->label); exit(1); } } void qemu_chr_fe_release(CharDriverState *s) { s->avail_connections++; } void qemu_chr_disconnect(CharDriverState *chr) { if (chr->chr_disconnect) { chr->chr_disconnect(chr); } } static void qemu_chr_free_common(CharDriverState *chr) { g_free(chr->filename); g_free(chr->label); if (chr->logfd != -1) { close(chr->logfd); } qemu_mutex_destroy(&chr->chr_write_lock); g_free(chr); } void qemu_chr_free(CharDriverState *chr) { if (chr->chr_close) { chr->chr_close(chr); } qemu_chr_free_common(chr); } void qemu_chr_delete(CharDriverState *chr) { QTAILQ_REMOVE(&chardevs, chr, next); qemu_chr_free(chr); } ChardevInfoList *qmp_query_chardev(Error **errp) { ChardevInfoList *chr_list = NULL; CharDriverState *chr; QTAILQ_FOREACH(chr, &chardevs, next) { ChardevInfoList *info = g_malloc0(sizeof(*info)); info->value = g_malloc0(sizeof(*info->value)); info->value->label = g_strdup(chr->label); info->value->filename = g_strdup(chr->filename); info->value->frontend_open = chr->fe_open; info->next = chr_list; chr_list = info; } return chr_list; } ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp) { ChardevBackendInfoList *backend_list = NULL; CharDriver *c = NULL; GSList *i = NULL; for (i = backends; i; i = i->next) { ChardevBackendInfoList *info = g_malloc0(sizeof(*info)); c = i->data; info->value = g_malloc0(sizeof(*info->value)); info->value->name = g_strdup(c->name); info->next = backend_list; backend_list = info; } return backend_list; } CharDriverState *qemu_chr_find(const char *name) { CharDriverState *chr; QTAILQ_FOREACH(chr, &chardevs, next) { if (strcmp(chr->label, name) != 0) continue; return chr; } return NULL; } QemuOptsList qemu_chardev_opts = { .name = "chardev", .implied_opt_name = "backend", .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head), .desc = { { .name = "backend", .type = QEMU_OPT_STRING, },{ .name = "path", .type = QEMU_OPT_STRING, },{ .name = "host", .type = QEMU_OPT_STRING, },{ .name = "port", .type = QEMU_OPT_STRING, },{ .name = "localaddr", .type = QEMU_OPT_STRING, },{ .name = "localport", .type = QEMU_OPT_STRING, },{ .name = "to", .type = QEMU_OPT_NUMBER, },{ .name = "ipv4", .type = QEMU_OPT_BOOL, },{ .name = "ipv6", .type = QEMU_OPT_BOOL, },{ .name = "wait", .type = QEMU_OPT_BOOL, },{ .name = "server", .type = QEMU_OPT_BOOL, },{ .name = "delay", .type = QEMU_OPT_BOOL, },{ .name = "reconnect", .type = QEMU_OPT_NUMBER, },{ .name = "telnet", .type = QEMU_OPT_BOOL, },{ .name = "tls-creds", .type = QEMU_OPT_STRING, },{ .name = "width", .type = QEMU_OPT_NUMBER, },{ .name = "height", .type = QEMU_OPT_NUMBER, },{ .name = "cols", .type = QEMU_OPT_NUMBER, },{ .name = "rows", .type = QEMU_OPT_NUMBER, },{ .name = "mux", .type = QEMU_OPT_BOOL, },{ .name = "signal", .type = QEMU_OPT_BOOL, },{ .name = "name", .type = QEMU_OPT_STRING, },{ .name = "debug", .type = QEMU_OPT_NUMBER, },{ .name = "size", .type = QEMU_OPT_SIZE, },{ .name = "chardev", .type = QEMU_OPT_STRING, },{ .name = "append", .type = QEMU_OPT_BOOL, },{ .name = "logfile", .type = QEMU_OPT_STRING, },{ .name = "logappend", .type = QEMU_OPT_BOOL, }, { /* end of list */ } }, }; #ifdef _WIN32 static CharDriverState *qmp_chardev_open_file(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevFile *file = backend->u.file.data; ChardevCommon *common = qapi_ChardevFile_base(file); HANDLE out; DWORD accessmode; DWORD flags; if (file->has_in) { error_setg(errp, "input file not supported"); return NULL; } if (file->has_append && file->append) { /* Append to file if it already exists. */ accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA; flags = OPEN_ALWAYS; } else { /* Truncate file if it already exists. */ accessmode = GENERIC_WRITE; flags = CREATE_ALWAYS; } out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags, FILE_ATTRIBUTE_NORMAL, NULL); if (out == INVALID_HANDLE_VALUE) { error_setg(errp, "open %s failed", file->out); return NULL; } return qemu_chr_open_win_file(out, common, errp); } static CharDriverState *qmp_chardev_open_serial(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevHostdev *serial = backend->u.serial.data; ChardevCommon *common = qapi_ChardevHostdev_base(serial); return qemu_chr_open_win_path(serial->device, common, errp); } #else /* WIN32 */ static int qmp_chardev_open_file_source(char *src, int flags, Error **errp) { int fd = -1; TFR(fd = qemu_open(src, flags, 0666)); if (fd == -1) { error_setg_file_open(errp, errno, src); } return fd; } static CharDriverState *qmp_chardev_open_file(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevFile *file = backend->u.file.data; ChardevCommon *common = qapi_ChardevFile_base(file); int flags, in = -1, out; flags = O_WRONLY | O_CREAT | O_BINARY; if (file->has_append && file->append) { flags |= O_APPEND; } else { flags |= O_TRUNC; } out = qmp_chardev_open_file_source(file->out, flags, errp); if (out < 0) { return NULL; } if (file->has_in) { flags = O_RDONLY; in = qmp_chardev_open_file_source(file->in, flags, errp); if (in < 0) { qemu_close(out); return NULL; } } return qemu_chr_open_fd(in, out, common, errp); } #ifdef HAVE_CHARDEV_SERIAL static CharDriverState *qmp_chardev_open_serial(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevHostdev *serial = backend->u.serial.data; ChardevCommon *common = qapi_ChardevHostdev_base(serial); int fd; fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp); if (fd < 0) { return NULL; } qemu_set_nonblock(fd); return qemu_chr_open_tty_fd(fd, common, errp); } #endif #ifdef HAVE_CHARDEV_PARPORT static CharDriverState *qmp_chardev_open_parallel(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevHostdev *parallel = backend->u.parallel.data; ChardevCommon *common = qapi_ChardevHostdev_base(parallel); int fd; fd = qmp_chardev_open_file_source(parallel->device, O_RDWR, errp); if (fd < 0) { return NULL; } return qemu_chr_open_pp_fd(fd, common, errp); } #endif #endif /* WIN32 */ static gboolean socket_reconnect_timeout(gpointer opaque) { CharDriverState *chr = opaque; TCPCharDriver *s = chr->opaque; QIOChannelSocket *sioc; s->reconnect_timer = 0; if (chr->be_open) { return false; } sioc = qio_channel_socket_new(); qio_channel_socket_connect_async(sioc, s->addr, qemu_chr_socket_connected, chr, NULL); return false; } static CharDriverState *qmp_chardev_open_socket(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { CharDriverState *chr; TCPCharDriver *s; ChardevSocket *sock = backend->u.socket.data; SocketAddress *addr = sock->addr; bool do_nodelay = sock->has_nodelay ? sock->nodelay : false; bool is_listen = sock->has_server ? sock->server : true; bool is_telnet = sock->has_telnet ? sock->telnet : false; bool is_waitconnect = sock->has_wait ? sock->wait : false; int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0; ChardevCommon *common = qapi_ChardevSocket_base(sock); QIOChannelSocket *sioc = NULL; chr = qemu_chr_alloc(common, errp); if (!chr) { return NULL; } s = g_new0(TCPCharDriver, 1); s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX; s->is_listen = is_listen; s->is_telnet = is_telnet; s->do_nodelay = do_nodelay; if (sock->tls_creds) { Object *creds; creds = object_resolve_path_component( object_get_objects_root(), sock->tls_creds); if (!creds) { error_setg(errp, "No TLS credentials with id '%s'", sock->tls_creds); goto error; } s->tls_creds = (QCryptoTLSCreds *) object_dynamic_cast(creds, TYPE_QCRYPTO_TLS_CREDS); if (!s->tls_creds) { error_setg(errp, "Object with id '%s' is not TLS credentials", sock->tls_creds); goto error; } object_ref(OBJECT(s->tls_creds)); if (is_listen) { if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { error_setg(errp, "%s", "Expected TLS credentials for server endpoint"); goto error; } } else { if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) { error_setg(errp, "%s", "Expected TLS credentials for client endpoint"); goto error; } } } s->addr = QAPI_CLONE(SocketAddress, sock->addr); qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE); if (s->is_unix) { qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS); } chr->opaque = s; chr->chr_wait_connected = tcp_chr_wait_connected; chr->chr_write = tcp_chr_write; chr->chr_sync_read = tcp_chr_sync_read; chr->chr_close = tcp_chr_close; chr->chr_disconnect = tcp_chr_disconnect; chr->get_msgfds = tcp_get_msgfds; chr->set_msgfds = tcp_set_msgfds; chr->chr_add_client = tcp_chr_add_client; chr->chr_add_watch = tcp_chr_add_watch; chr->chr_update_read_handler = tcp_chr_update_read_handler; /* be isn't opened until we get a connection */ chr->explicit_be_open = true; chr->filename = SocketAddress_to_str("disconnected:", addr, is_listen, is_telnet); if (is_listen) { if (is_telnet) { s->do_telnetopt = 1; } } else if (reconnect > 0) { s->reconnect_time = reconnect; } if (s->reconnect_time) { sioc = qio_channel_socket_new(); qio_channel_socket_connect_async(sioc, s->addr, qemu_chr_socket_connected, chr, NULL); } else { if (s->is_listen) { sioc = qio_channel_socket_new(); if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) { goto error; } s->listen_ioc = sioc; if (is_waitconnect && qemu_chr_wait_connected(chr, errp) < 0) { goto error; } if (!s->ioc) { s->listen_tag = qio_channel_add_watch( QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL); } } else if (qemu_chr_wait_connected(chr, errp) < 0) { goto error; } } return chr; error: if (sioc) { object_unref(OBJECT(sioc)); } if (s->tls_creds) { object_unref(OBJECT(s->tls_creds)); } g_free(s); qemu_chr_free_common(chr); return NULL; } static CharDriverState *qmp_chardev_open_udp(const char *id, ChardevBackend *backend, ChardevReturn *ret, Error **errp) { ChardevUdp *udp = backend->u.udp.data; ChardevCommon *common = qapi_ChardevUdp_base(udp); QIOChannelSocket *sioc = qio_channel_socket_new(); if (qio_channel_socket_dgram_sync(sioc, udp->local, udp->remote, errp) < 0) { object_unref(OBJECT(sioc)); return NULL; } return qemu_chr_open_udp(sioc, common, errp); } bool qemu_chr_has_feature(CharDriverState *chr, CharDriverFeature feature) { return test_bit(feature, chr->features); } void qemu_chr_set_feature(CharDriverState *chr, CharDriverFeature feature) { return set_bit(feature, chr->features); } ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend, Error **errp) { ChardevReturn *ret = g_new0(ChardevReturn, 1); CharDriverState *chr = NULL; Error *local_err = NULL; GSList *i; CharDriver *cd; chr = qemu_chr_find(id); if (chr) { error_setg(errp, "Chardev '%s' already exists", id); g_free(ret); return NULL; } for (i = backends; i; i = i->next) { cd = i->data; if (cd->kind == backend->type) { chr = cd->create(id, backend, ret, &local_err); if (local_err) { error_propagate(errp, local_err); goto out_error; } break; } } if (chr == NULL) { assert(!i); error_setg(errp, "chardev backend not available"); goto out_error; } chr->label = g_strdup(id); chr->avail_connections = (backend->type == CHARDEV_BACKEND_KIND_MUX) ? MAX_MUX : 1; if (!chr->filename) { chr->filename = g_strdup(ChardevBackendKind_lookup[backend->type]); } if (!chr->explicit_be_open) { qemu_chr_be_event(chr, CHR_EVENT_OPENED); } QTAILQ_INSERT_TAIL(&chardevs, chr, next); return ret; out_error: g_free(ret); return NULL; } void qmp_chardev_remove(const char *id, Error **errp) { CharDriverState *chr; chr = qemu_chr_find(id); if (chr == NULL) { error_setg(errp, "Chardev '%s' not found", id); return; } if (chr->chr_can_read || chr->chr_read || chr->chr_event || chr->handler_opaque) { error_setg(errp, "Chardev '%s' is busy", id); return; } if (chr->replay) { error_setg(errp, "Chardev '%s' cannot be unplugged in record/replay mode", id); return; } qemu_chr_delete(chr); } void qemu_chr_cleanup(void) { CharDriverState *chr, *tmp; QTAILQ_FOREACH_SAFE(chr, &chardevs, next, tmp) { qemu_chr_delete(chr); } } static void register_types(void) { register_char_driver("null", CHARDEV_BACKEND_KIND_NULL, NULL, qemu_chr_open_null); register_char_driver("socket", CHARDEV_BACKEND_KIND_SOCKET, qemu_chr_parse_socket, qmp_chardev_open_socket); register_char_driver("udp", CHARDEV_BACKEND_KIND_UDP, qemu_chr_parse_udp, qmp_chardev_open_udp); register_char_driver("ringbuf", CHARDEV_BACKEND_KIND_RINGBUF, qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf); register_char_driver("file", CHARDEV_BACKEND_KIND_FILE, qemu_chr_parse_file_out, qmp_chardev_open_file); register_char_driver("stdio", CHARDEV_BACKEND_KIND_STDIO, qemu_chr_parse_stdio, qemu_chr_open_stdio); #if defined HAVE_CHARDEV_SERIAL register_char_driver("serial", CHARDEV_BACKEND_KIND_SERIAL, qemu_chr_parse_serial, qmp_chardev_open_serial); register_char_driver("tty", CHARDEV_BACKEND_KIND_SERIAL, qemu_chr_parse_serial, qmp_chardev_open_serial); #endif #ifdef HAVE_CHARDEV_PARPORT register_char_driver("parallel", CHARDEV_BACKEND_KIND_PARALLEL, qemu_chr_parse_parallel, qmp_chardev_open_parallel); register_char_driver("parport", CHARDEV_BACKEND_KIND_PARALLEL, qemu_chr_parse_parallel, qmp_chardev_open_parallel); #endif #ifdef HAVE_CHARDEV_PTY register_char_driver("pty", CHARDEV_BACKEND_KIND_PTY, NULL, qemu_chr_open_pty); #endif #ifdef _WIN32 register_char_driver("console", CHARDEV_BACKEND_KIND_CONSOLE, NULL, qemu_chr_open_win_con); #endif register_char_driver("pipe", CHARDEV_BACKEND_KIND_PIPE, qemu_chr_parse_pipe, qemu_chr_open_pipe); register_char_driver("mux", CHARDEV_BACKEND_KIND_MUX, qemu_chr_parse_mux, qemu_chr_open_mux); /* Bug-compatibility: */ register_char_driver("memory", CHARDEV_BACKEND_KIND_MEMORY, qemu_chr_parse_ringbuf, qemu_chr_open_ringbuf); /* this must be done after machine init, since we register FEs with muxes * as part of realize functions like serial_isa_realizefn when -nographic * is specified */ qemu_add_machine_init_done_notifier(&muxes_realize_notify); } type_init(register_types);