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https://github.com/xemu-project/xemu.git
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692277f38d
If a chardev has a logfile the file is opened using qemu_open_old() which does the job, but since @errp is not propagated into qemu_open_internal() we lose much more accurate error and just report "Unable to open logfile $errno". When using plain files, it's probably okay as nothing complex is happening behind the curtains. But the problem becomes more prominent when passing an "/dev/fdset/XXX" path since much more needs to be done. The fix is to use qemu_create() which passes @errp further down. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <f34ee80866e6f591bcb98401dee27682f5543fca.1629190206.git.mprivozn@redhat.com>
1231 lines
33 KiB
C
1231 lines
33 KiB
C
/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu/cutils.h"
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#include "monitor/monitor.h"
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#include "qemu/config-file.h"
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#include "qemu/error-report.h"
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#include "qemu/qemu-print.h"
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#include "chardev/char.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-char.h"
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#include "qapi/qmp/qerror.h"
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#include "sysemu/replay.h"
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#include "qemu/help_option.h"
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#include "qemu/module.h"
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#include "qemu/option.h"
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#include "qemu/id.h"
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#include "qemu/coroutine.h"
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#include "qemu/yank.h"
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#include "chardev-internal.h"
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/***********************************************************/
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/* character device */
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Object *get_chardevs_root(void)
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{
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return container_get(object_get_root(), "/chardevs");
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}
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static void chr_be_event(Chardev *s, QEMUChrEvent event)
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{
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CharBackend *be = s->be;
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if (!be || !be->chr_event) {
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return;
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}
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be->chr_event(be->opaque, event);
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}
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void qemu_chr_be_event(Chardev *s, QEMUChrEvent event)
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{
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/* Keep track if the char device is open */
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switch (event) {
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case CHR_EVENT_OPENED:
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s->be_open = 1;
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break;
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case CHR_EVENT_CLOSED:
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s->be_open = 0;
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break;
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case CHR_EVENT_BREAK:
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case CHR_EVENT_MUX_IN:
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case CHR_EVENT_MUX_OUT:
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/* Ignore */
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break;
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}
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CHARDEV_GET_CLASS(s)->chr_be_event(s, event);
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}
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/* Not reporting errors from writing to logfile, as logs are
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* defined to be "best effort" only */
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static void qemu_chr_write_log(Chardev *s, const uint8_t *buf, size_t len)
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{
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size_t done = 0;
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ssize_t ret;
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if (s->logfd < 0) {
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return;
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}
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while (done < len) {
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retry:
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ret = write(s->logfd, buf + done, len - done);
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if (ret == -1 && errno == EAGAIN) {
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g_usleep(100);
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goto retry;
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}
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if (ret <= 0) {
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return;
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}
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done += ret;
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}
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}
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static int qemu_chr_write_buffer(Chardev *s,
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const uint8_t *buf, int len,
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int *offset, bool write_all)
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{
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ChardevClass *cc = CHARDEV_GET_CLASS(s);
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int res = 0;
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*offset = 0;
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qemu_mutex_lock(&s->chr_write_lock);
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while (*offset < len) {
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retry:
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res = cc->chr_write(s, buf + *offset, len - *offset);
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if (res < 0 && errno == EAGAIN && write_all) {
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if (qemu_in_coroutine()) {
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qemu_co_sleep_ns(QEMU_CLOCK_REALTIME, 100000);
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} else {
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g_usleep(100);
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}
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goto retry;
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}
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if (res <= 0) {
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break;
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}
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*offset += res;
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if (!write_all) {
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break;
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}
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}
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if (*offset > 0) {
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/*
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* If some data was written by backend, we should
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* only log what was actually written. This method
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* may be invoked again to write the remaining
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* method, thus we'll log the remainder at that time.
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*/
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qemu_chr_write_log(s, buf, *offset);
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} else if (res < 0) {
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/*
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* If a fatal error was reported by the backend,
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* assume this method won't be invoked again with
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* this buffer, so log it all right away.
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*/
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qemu_chr_write_log(s, buf, len);
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}
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qemu_mutex_unlock(&s->chr_write_lock);
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return res;
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}
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int qemu_chr_write(Chardev *s, const uint8_t *buf, int len, bool write_all)
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{
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int offset = 0;
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int res;
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if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_PLAY) {
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replay_char_write_event_load(&res, &offset);
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assert(offset <= len);
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qemu_chr_write_buffer(s, buf, offset, &offset, true);
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return res;
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}
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res = qemu_chr_write_buffer(s, buf, len, &offset, write_all);
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if (qemu_chr_replay(s) && replay_mode == REPLAY_MODE_RECORD) {
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replay_char_write_event_save(res, offset);
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}
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if (res < 0) {
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return res;
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}
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return offset;
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}
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int qemu_chr_be_can_write(Chardev *s)
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{
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CharBackend *be = s->be;
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if (!be || !be->chr_can_read) {
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return 0;
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}
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return be->chr_can_read(be->opaque);
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}
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void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len)
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{
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CharBackend *be = s->be;
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if (be && be->chr_read) {
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be->chr_read(be->opaque, buf, len);
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}
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}
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void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len)
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{
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if (qemu_chr_replay(s)) {
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if (replay_mode == REPLAY_MODE_PLAY) {
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return;
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}
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replay_chr_be_write(s, buf, len);
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} else {
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qemu_chr_be_write_impl(s, buf, len);
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}
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}
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void qemu_chr_be_update_read_handlers(Chardev *s,
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GMainContext *context)
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{
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ChardevClass *cc = CHARDEV_GET_CLASS(s);
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assert(qemu_chr_has_feature(s, QEMU_CHAR_FEATURE_GCONTEXT)
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|| !context);
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s->gcontext = context;
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if (cc->chr_update_read_handler) {
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cc->chr_update_read_handler(s);
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}
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}
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int qemu_chr_add_client(Chardev *s, int fd)
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{
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return CHARDEV_GET_CLASS(s)->chr_add_client ?
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CHARDEV_GET_CLASS(s)->chr_add_client(s, fd) : -1;
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}
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static void qemu_char_open(Chardev *chr, ChardevBackend *backend,
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bool *be_opened, Error **errp)
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{
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ChardevClass *cc = CHARDEV_GET_CLASS(chr);
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/* Any ChardevCommon member would work */
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ChardevCommon *common = backend ? backend->u.null.data : NULL;
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if (common && common->has_logfile) {
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int flags = O_WRONLY;
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if (common->has_logappend &&
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common->logappend) {
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flags |= O_APPEND;
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} else {
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flags |= O_TRUNC;
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}
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chr->logfd = qemu_create(common->logfile, flags, 0666, errp);
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if (chr->logfd < 0) {
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return;
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}
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}
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if (cc->open) {
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cc->open(chr, backend, be_opened, errp);
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}
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}
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static void char_init(Object *obj)
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{
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Chardev *chr = CHARDEV(obj);
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chr->handover_yank_instance = false;
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chr->logfd = -1;
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qemu_mutex_init(&chr->chr_write_lock);
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/*
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* Assume if chr_update_read_handler is implemented it will
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* take the updated gcontext into account.
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*/
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if (CHARDEV_GET_CLASS(chr)->chr_update_read_handler) {
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qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_GCONTEXT);
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}
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}
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static int null_chr_write(Chardev *chr, const uint8_t *buf, int len)
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{
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return len;
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}
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static void char_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->chr_write = null_chr_write;
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cc->chr_be_event = chr_be_event;
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}
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static void char_finalize(Object *obj)
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{
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Chardev *chr = CHARDEV(obj);
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if (chr->be) {
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chr->be->chr = NULL;
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}
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g_free(chr->filename);
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g_free(chr->label);
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if (chr->logfd != -1) {
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close(chr->logfd);
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}
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qemu_mutex_destroy(&chr->chr_write_lock);
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}
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static const TypeInfo char_type_info = {
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.name = TYPE_CHARDEV,
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.parent = TYPE_OBJECT,
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.instance_size = sizeof(Chardev),
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.instance_init = char_init,
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.instance_finalize = char_finalize,
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.abstract = true,
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.class_size = sizeof(ChardevClass),
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.class_init = char_class_init,
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};
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static bool qemu_chr_is_busy(Chardev *s)
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{
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if (CHARDEV_IS_MUX(s)) {
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MuxChardev *d = MUX_CHARDEV(s);
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return d->mux_cnt >= 0;
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} else {
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return s->be != NULL;
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}
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}
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int qemu_chr_wait_connected(Chardev *chr, Error **errp)
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{
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ChardevClass *cc = CHARDEV_GET_CLASS(chr);
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if (cc->chr_wait_connected) {
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return cc->chr_wait_connected(chr, errp);
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}
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return 0;
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}
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QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename,
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bool permit_mux_mon)
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{
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char host[65], port[33], width[8], height[8];
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int pos;
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const char *p;
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QemuOpts *opts;
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Error *local_err = NULL;
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opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, &local_err);
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if (local_err) {
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error_report_err(local_err);
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return NULL;
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}
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if (strstart(filename, "mon:", &p)) {
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if (!permit_mux_mon) {
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error_report("mon: isn't supported in this context");
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return NULL;
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}
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filename = p;
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qemu_opt_set(opts, "mux", "on", &error_abort);
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if (strcmp(filename, "stdio") == 0) {
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/* Monitor is muxed to stdio: do not exit on Ctrl+C by default
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* but pass it to the guest. Handle this only for compat syntax,
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* for -chardev syntax we have special option for this.
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* This is what -nographic did, redirecting+muxing serial+monitor
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* to stdio causing Ctrl+C to be passed to guest. */
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qemu_opt_set(opts, "signal", "off", &error_abort);
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}
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}
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if (strcmp(filename, "null") == 0 ||
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strcmp(filename, "pty") == 0 ||
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strcmp(filename, "msmouse") == 0 ||
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strcmp(filename, "wctablet") == 0 ||
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strcmp(filename, "braille") == 0 ||
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strcmp(filename, "testdev") == 0 ||
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strcmp(filename, "stdio") == 0) {
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qemu_opt_set(opts, "backend", filename, &error_abort);
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return opts;
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}
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if (strstart(filename, "vc", &p)) {
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qemu_opt_set(opts, "backend", "vc", &error_abort);
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if (*p == ':') {
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if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
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/* pixels */
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qemu_opt_set(opts, "width", width, &error_abort);
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qemu_opt_set(opts, "height", height, &error_abort);
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} else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
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/* chars */
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qemu_opt_set(opts, "cols", width, &error_abort);
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qemu_opt_set(opts, "rows", height, &error_abort);
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} else {
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goto fail;
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}
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}
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return opts;
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}
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if (strcmp(filename, "con:") == 0) {
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qemu_opt_set(opts, "backend", "console", &error_abort);
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return opts;
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}
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if (strstart(filename, "COM", NULL)) {
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qemu_opt_set(opts, "backend", "serial", &error_abort);
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qemu_opt_set(opts, "path", filename, &error_abort);
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return opts;
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}
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if (strstart(filename, "file:", &p)) {
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qemu_opt_set(opts, "backend", "file", &error_abort);
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qemu_opt_set(opts, "path", p, &error_abort);
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return opts;
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}
|
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if (strstart(filename, "pipe:", &p)) {
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qemu_opt_set(opts, "backend", "pipe", &error_abort);
|
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qemu_opt_set(opts, "path", p, &error_abort);
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return opts;
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}
|
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if (strstart(filename, "tcp:", &p) ||
|
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strstart(filename, "telnet:", &p) ||
|
|
strstart(filename, "tn3270:", &p) ||
|
|
strstart(filename, "websocket:", &p)) {
|
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if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
|
|
host[0] = 0;
|
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if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
|
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goto fail;
|
|
}
|
|
qemu_opt_set(opts, "backend", "socket", &error_abort);
|
|
qemu_opt_set(opts, "host", host, &error_abort);
|
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qemu_opt_set(opts, "port", port, &error_abort);
|
|
if (p[pos] == ',') {
|
|
if (!qemu_opts_do_parse(opts, p + pos + 1, NULL, &local_err)) {
|
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error_report_err(local_err);
|
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goto fail;
|
|
}
|
|
}
|
|
if (strstart(filename, "telnet:", &p)) {
|
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qemu_opt_set(opts, "telnet", "on", &error_abort);
|
|
} else if (strstart(filename, "tn3270:", &p)) {
|
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qemu_opt_set(opts, "tn3270", "on", &error_abort);
|
|
} else if (strstart(filename, "websocket:", &p)) {
|
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qemu_opt_set(opts, "websocket", "on", &error_abort);
|
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}
|
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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);
|
|
if (!qemu_opts_do_parse(opts, p, "path", &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", "parallel", &error_abort);
|
|
qemu_opt_set(opts, "path", filename, &error_abort);
|
|
return opts;
|
|
}
|
|
if (strstart(filename, "/dev/", NULL)) {
|
|
qemu_opt_set(opts, "backend", "serial", &error_abort);
|
|
qemu_opt_set(opts, "path", filename, &error_abort);
|
|
return opts;
|
|
}
|
|
|
|
error_report("'%s' is not a valid char driver", filename);
|
|
|
|
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 = g_strdup(logfile);
|
|
|
|
backend->has_logappend = true;
|
|
backend->logappend = qemu_opt_get_bool(opts, "logappend", false);
|
|
}
|
|
|
|
static const ChardevClass *char_get_class(const char *driver, Error **errp)
|
|
{
|
|
ObjectClass *oc;
|
|
const ChardevClass *cc;
|
|
char *typename = g_strdup_printf("chardev-%s", driver);
|
|
|
|
oc = module_object_class_by_name(typename);
|
|
g_free(typename);
|
|
|
|
if (!object_class_dynamic_cast(oc, TYPE_CHARDEV)) {
|
|
error_setg(errp, "'%s' is not a valid char driver name", driver);
|
|
return NULL;
|
|
}
|
|
|
|
if (object_class_is_abstract(oc)) {
|
|
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
|
|
"an abstract device type");
|
|
return NULL;
|
|
}
|
|
|
|
cc = CHARDEV_CLASS(oc);
|
|
if (cc->internal) {
|
|
error_setg(errp, "'%s' is not a valid char driver name", driver);
|
|
return NULL;
|
|
}
|
|
|
|
return cc;
|
|
}
|
|
|
|
static struct ChardevAlias {
|
|
const char *typename;
|
|
const char *alias;
|
|
bool deprecation_warning_printed;
|
|
} chardev_alias_table[] = {
|
|
#ifdef HAVE_CHARDEV_PARPORT
|
|
{ "parallel", "parport" },
|
|
#endif
|
|
#ifdef HAVE_CHARDEV_SERIAL
|
|
{ "serial", "tty" },
|
|
#endif
|
|
};
|
|
|
|
typedef struct ChadevClassFE {
|
|
void (*fn)(const char *name, void *opaque);
|
|
void *opaque;
|
|
} ChadevClassFE;
|
|
|
|
static void
|
|
chardev_class_foreach(ObjectClass *klass, void *opaque)
|
|
{
|
|
ChadevClassFE *fe = opaque;
|
|
|
|
assert(g_str_has_prefix(object_class_get_name(klass), "chardev-"));
|
|
if (CHARDEV_CLASS(klass)->internal) {
|
|
return;
|
|
}
|
|
|
|
fe->fn(object_class_get_name(klass) + 8, fe->opaque);
|
|
}
|
|
|
|
static void
|
|
chardev_name_foreach(void (*fn)(const char *name, void *opaque),
|
|
void *opaque)
|
|
{
|
|
ChadevClassFE fe = { .fn = fn, .opaque = opaque };
|
|
|
|
object_class_foreach(chardev_class_foreach, TYPE_CHARDEV, false, &fe);
|
|
}
|
|
|
|
static void
|
|
help_string_append(const char *name, void *opaque)
|
|
{
|
|
GString *str = opaque;
|
|
|
|
g_string_append_printf(str, "\n %s", name);
|
|
}
|
|
|
|
static const char *chardev_alias_translate(const char *name)
|
|
{
|
|
int i;
|
|
for (i = 0; i < (int)ARRAY_SIZE(chardev_alias_table); i++) {
|
|
if (g_strcmp0(chardev_alias_table[i].alias, name) == 0) {
|
|
if (!chardev_alias_table[i].deprecation_warning_printed) {
|
|
warn_report("The alias '%s' is deprecated, use '%s' instead",
|
|
name, chardev_alias_table[i].typename);
|
|
chardev_alias_table[i].deprecation_warning_printed = true;
|
|
}
|
|
return chardev_alias_table[i].typename;
|
|
}
|
|
}
|
|
return name;
|
|
}
|
|
|
|
ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
const ChardevClass *cc;
|
|
ChardevBackend *backend = NULL;
|
|
const char *name = chardev_alias_translate(qemu_opt_get(opts, "backend"));
|
|
|
|
if (name == NULL) {
|
|
error_setg(errp, "chardev: \"%s\" missing backend",
|
|
qemu_opts_id(opts));
|
|
return NULL;
|
|
}
|
|
|
|
cc = char_get_class(name, errp);
|
|
if (cc == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
backend = g_new0(ChardevBackend, 1);
|
|
backend->type = CHARDEV_BACKEND_KIND_NULL;
|
|
|
|
if (cc->parse) {
|
|
cc->parse(opts, backend, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
qapi_free_ChardevBackend(backend);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
ChardevCommon *ccom = g_new0(ChardevCommon, 1);
|
|
qemu_chr_parse_common(opts, ccom);
|
|
backend->u.null.data = ccom; /* Any ChardevCommon member would work */
|
|
}
|
|
|
|
return backend;
|
|
}
|
|
|
|
Chardev *qemu_chr_new_from_opts(QemuOpts *opts, GMainContext *context,
|
|
Error **errp)
|
|
{
|
|
const ChardevClass *cc;
|
|
Chardev *chr = NULL;
|
|
ChardevBackend *backend = NULL;
|
|
const char *name = chardev_alias_translate(qemu_opt_get(opts, "backend"));
|
|
const char *id = qemu_opts_id(opts);
|
|
char *bid = NULL;
|
|
|
|
if (name && is_help_option(name)) {
|
|
GString *str = g_string_new("");
|
|
|
|
chardev_name_foreach(help_string_append, str);
|
|
|
|
qemu_printf("Available chardev backend types: %s\n", str->str);
|
|
g_string_free(str, true);
|
|
return NULL;
|
|
}
|
|
|
|
if (id == NULL) {
|
|
error_setg(errp, "chardev: no id specified");
|
|
return NULL;
|
|
}
|
|
|
|
backend = qemu_chr_parse_opts(opts, errp);
|
|
if (backend == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
cc = char_get_class(name, errp);
|
|
if (cc == NULL) {
|
|
goto out;
|
|
}
|
|
|
|
if (qemu_opt_get_bool(opts, "mux", 0)) {
|
|
bid = g_strdup_printf("%s-base", id);
|
|
}
|
|
|
|
chr = qemu_chardev_new(bid ? bid : id,
|
|
object_class_get_name(OBJECT_CLASS(cc)),
|
|
backend, context, errp);
|
|
|
|
if (chr == NULL) {
|
|
goto out;
|
|
}
|
|
|
|
if (bid) {
|
|
Chardev *mux;
|
|
qapi_free_ChardevBackend(backend);
|
|
backend = g_new0(ChardevBackend, 1);
|
|
backend->type = CHARDEV_BACKEND_KIND_MUX;
|
|
backend->u.mux.data = g_new0(ChardevMux, 1);
|
|
backend->u.mux.data->chardev = g_strdup(bid);
|
|
mux = qemu_chardev_new(id, TYPE_CHARDEV_MUX, backend, context, errp);
|
|
if (mux == NULL) {
|
|
object_unparent(OBJECT(chr));
|
|
chr = NULL;
|
|
goto out;
|
|
}
|
|
chr = mux;
|
|
}
|
|
|
|
out:
|
|
qapi_free_ChardevBackend(backend);
|
|
g_free(bid);
|
|
return chr;
|
|
}
|
|
|
|
Chardev *qemu_chr_new_noreplay(const char *label, const char *filename,
|
|
bool permit_mux_mon, GMainContext *context)
|
|
{
|
|
const char *p;
|
|
Chardev *chr;
|
|
QemuOpts *opts;
|
|
Error *err = NULL;
|
|
|
|
if (strstart(filename, "chardev:", &p)) {
|
|
return qemu_chr_find(p);
|
|
}
|
|
|
|
opts = qemu_chr_parse_compat(label, filename, permit_mux_mon);
|
|
if (!opts)
|
|
return NULL;
|
|
|
|
chr = qemu_chr_new_from_opts(opts, context, &err);
|
|
if (!chr) {
|
|
error_report_err(err);
|
|
goto out;
|
|
}
|
|
|
|
if (qemu_opt_get_bool(opts, "mux", 0)) {
|
|
assert(permit_mux_mon);
|
|
monitor_init_hmp(chr, true, &err);
|
|
if (err) {
|
|
error_report_err(err);
|
|
object_unparent(OBJECT(chr));
|
|
chr = NULL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out:
|
|
qemu_opts_del(opts);
|
|
return chr;
|
|
}
|
|
|
|
static Chardev *qemu_chr_new_permit_mux_mon(const char *label,
|
|
const char *filename,
|
|
bool permit_mux_mon,
|
|
GMainContext *context)
|
|
{
|
|
Chardev *chr;
|
|
chr = qemu_chr_new_noreplay(label, filename, permit_mux_mon, context);
|
|
if (chr) {
|
|
if (replay_mode != REPLAY_MODE_NONE) {
|
|
qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_REPLAY);
|
|
}
|
|
if (qemu_chr_replay(chr) && CHARDEV_GET_CLASS(chr)->chr_ioctl) {
|
|
error_report("Replay: ioctl is not supported "
|
|
"for serial devices yet");
|
|
}
|
|
replay_register_char_driver(chr);
|
|
}
|
|
return chr;
|
|
}
|
|
|
|
Chardev *qemu_chr_new(const char *label, const char *filename,
|
|
GMainContext *context)
|
|
{
|
|
return qemu_chr_new_permit_mux_mon(label, filename, false, context);
|
|
}
|
|
|
|
Chardev *qemu_chr_new_mux_mon(const char *label, const char *filename,
|
|
GMainContext *context)
|
|
{
|
|
return qemu_chr_new_permit_mux_mon(label, filename, true, context);
|
|
}
|
|
|
|
static int qmp_query_chardev_foreach(Object *obj, void *data)
|
|
{
|
|
Chardev *chr = CHARDEV(obj);
|
|
ChardevInfoList **list = data;
|
|
ChardevInfo *value = g_malloc0(sizeof(*value));
|
|
|
|
value->label = g_strdup(chr->label);
|
|
value->filename = g_strdup(chr->filename);
|
|
value->frontend_open = chr->be && chr->be->fe_open;
|
|
|
|
QAPI_LIST_PREPEND(*list, value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
ChardevInfoList *qmp_query_chardev(Error **errp)
|
|
{
|
|
ChardevInfoList *chr_list = NULL;
|
|
|
|
object_child_foreach(get_chardevs_root(),
|
|
qmp_query_chardev_foreach, &chr_list);
|
|
|
|
return chr_list;
|
|
}
|
|
|
|
static void
|
|
qmp_prepend_backend(const char *name, void *opaque)
|
|
{
|
|
ChardevBackendInfoList **list = opaque;
|
|
ChardevBackendInfo *value;
|
|
|
|
value = g_new0(ChardevBackendInfo, 1);
|
|
value->name = g_strdup(name);
|
|
QAPI_LIST_PREPEND(*list, value);
|
|
}
|
|
|
|
ChardevBackendInfoList *qmp_query_chardev_backends(Error **errp)
|
|
{
|
|
ChardevBackendInfoList *backend_list = NULL;
|
|
|
|
chardev_name_foreach(qmp_prepend_backend, &backend_list);
|
|
|
|
return backend_list;
|
|
}
|
|
|
|
Chardev *qemu_chr_find(const char *name)
|
|
{
|
|
Object *obj = object_resolve_path_component(get_chardevs_root(), name);
|
|
|
|
return obj ? CHARDEV(obj) : 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 = "fd",
|
|
.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 = "nodelay",
|
|
.type = QEMU_OPT_BOOL,
|
|
},{
|
|
.name = "reconnect",
|
|
.type = QEMU_OPT_NUMBER,
|
|
},{
|
|
.name = "telnet",
|
|
.type = QEMU_OPT_BOOL,
|
|
},{
|
|
.name = "tn3270",
|
|
.type = QEMU_OPT_BOOL,
|
|
},{
|
|
.name = "tls-creds",
|
|
.type = QEMU_OPT_STRING,
|
|
},{
|
|
.name = "tls-authz",
|
|
.type = QEMU_OPT_STRING,
|
|
},{
|
|
.name = "websocket",
|
|
.type = QEMU_OPT_BOOL,
|
|
},{
|
|
.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,
|
|
},{
|
|
.name = "mouse",
|
|
.type = QEMU_OPT_BOOL,
|
|
},{
|
|
.name = "clipboard",
|
|
.type = QEMU_OPT_BOOL,
|
|
#ifdef CONFIG_LINUX
|
|
},{
|
|
.name = "tight",
|
|
.type = QEMU_OPT_BOOL,
|
|
.def_value_str = "on",
|
|
},{
|
|
.name = "abstract",
|
|
.type = QEMU_OPT_BOOL,
|
|
#endif
|
|
},
|
|
{ /* end of list */ }
|
|
},
|
|
};
|
|
|
|
bool qemu_chr_has_feature(Chardev *chr,
|
|
ChardevFeature feature)
|
|
{
|
|
return test_bit(feature, chr->features);
|
|
}
|
|
|
|
void qemu_chr_set_feature(Chardev *chr,
|
|
ChardevFeature feature)
|
|
{
|
|
return set_bit(feature, chr->features);
|
|
}
|
|
|
|
static Chardev *chardev_new(const char *id, const char *typename,
|
|
ChardevBackend *backend,
|
|
GMainContext *gcontext,
|
|
bool handover_yank_instance,
|
|
Error **errp)
|
|
{
|
|
Object *obj;
|
|
Chardev *chr = NULL;
|
|
Error *local_err = NULL;
|
|
bool be_opened = true;
|
|
|
|
assert(g_str_has_prefix(typename, "chardev-"));
|
|
assert(id);
|
|
|
|
obj = object_new(typename);
|
|
chr = CHARDEV(obj);
|
|
chr->handover_yank_instance = handover_yank_instance;
|
|
chr->label = g_strdup(id);
|
|
chr->gcontext = gcontext;
|
|
|
|
qemu_char_open(chr, backend, &be_opened, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
object_unref(obj);
|
|
return NULL;
|
|
}
|
|
|
|
if (!chr->filename) {
|
|
chr->filename = g_strdup(typename + 8);
|
|
}
|
|
if (be_opened) {
|
|
qemu_chr_be_event(chr, CHR_EVENT_OPENED);
|
|
}
|
|
|
|
return chr;
|
|
}
|
|
|
|
Chardev *qemu_chardev_new(const char *id, const char *typename,
|
|
ChardevBackend *backend,
|
|
GMainContext *gcontext,
|
|
Error **errp)
|
|
{
|
|
Chardev *chr;
|
|
g_autofree char *genid = NULL;
|
|
|
|
if (!id) {
|
|
genid = id_generate(ID_CHR);
|
|
id = genid;
|
|
}
|
|
|
|
chr = chardev_new(id, typename, backend, gcontext, false, errp);
|
|
if (!chr) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!object_property_try_add_child(get_chardevs_root(), id, OBJECT(chr),
|
|
errp)) {
|
|
object_unref(OBJECT(chr));
|
|
return NULL;
|
|
}
|
|
object_unref(OBJECT(chr));
|
|
|
|
return chr;
|
|
}
|
|
|
|
ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
|
|
Error **errp)
|
|
{
|
|
ERRP_GUARD();
|
|
const ChardevClass *cc;
|
|
ChardevReturn *ret;
|
|
g_autoptr(Chardev) chr = NULL;
|
|
|
|
if (qemu_chr_find(id)) {
|
|
error_setg(errp, "Chardev with id '%s' already exists", id);
|
|
return NULL;
|
|
}
|
|
|
|
cc = char_get_class(ChardevBackendKind_str(backend->type), errp);
|
|
if (!cc) {
|
|
goto err;
|
|
}
|
|
|
|
chr = chardev_new(id, object_class_get_name(OBJECT_CLASS(cc)),
|
|
backend, NULL, false, errp);
|
|
if (!chr) {
|
|
goto err;
|
|
}
|
|
|
|
if (!object_property_try_add_child(get_chardevs_root(), id, OBJECT(chr),
|
|
errp)) {
|
|
goto err;
|
|
}
|
|
|
|
ret = g_new0(ChardevReturn, 1);
|
|
if (CHARDEV_IS_PTY(chr)) {
|
|
ret->pty = g_strdup(chr->filename + 4);
|
|
ret->has_pty = true;
|
|
}
|
|
|
|
return ret;
|
|
|
|
err:
|
|
error_prepend(errp, "Failed to add chardev '%s': ", id);
|
|
return NULL;
|
|
}
|
|
|
|
ChardevReturn *qmp_chardev_change(const char *id, ChardevBackend *backend,
|
|
Error **errp)
|
|
{
|
|
CharBackend *be;
|
|
const ChardevClass *cc, *cc_new;
|
|
Chardev *chr, *chr_new;
|
|
bool closed_sent = false;
|
|
bool handover_yank_instance;
|
|
ChardevReturn *ret;
|
|
|
|
chr = qemu_chr_find(id);
|
|
if (!chr) {
|
|
error_setg(errp, "Chardev '%s' does not exist", id);
|
|
return NULL;
|
|
}
|
|
|
|
if (CHARDEV_IS_MUX(chr)) {
|
|
error_setg(errp, "Mux device hotswap not supported yet");
|
|
return NULL;
|
|
}
|
|
|
|
if (qemu_chr_replay(chr)) {
|
|
error_setg(errp,
|
|
"Chardev '%s' cannot be changed in record/replay mode", id);
|
|
return NULL;
|
|
}
|
|
|
|
be = chr->be;
|
|
if (!be) {
|
|
/* easy case */
|
|
object_unparent(OBJECT(chr));
|
|
return qmp_chardev_add(id, backend, errp);
|
|
}
|
|
|
|
if (!be->chr_be_change) {
|
|
error_setg(errp, "Chardev user does not support chardev hotswap");
|
|
return NULL;
|
|
}
|
|
|
|
cc = CHARDEV_GET_CLASS(chr);
|
|
cc_new = char_get_class(ChardevBackendKind_str(backend->type), errp);
|
|
if (!cc_new) {
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* The new chardev should not register a yank instance if the current
|
|
* chardev has registered one already.
|
|
*/
|
|
handover_yank_instance = cc->supports_yank && cc_new->supports_yank;
|
|
|
|
chr_new = chardev_new(id, object_class_get_name(OBJECT_CLASS(cc_new)),
|
|
backend, chr->gcontext, handover_yank_instance, errp);
|
|
if (!chr_new) {
|
|
return NULL;
|
|
}
|
|
|
|
if (chr->be_open && !chr_new->be_open) {
|
|
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
|
|
closed_sent = true;
|
|
}
|
|
|
|
chr->be = NULL;
|
|
qemu_chr_fe_init(be, chr_new, &error_abort);
|
|
|
|
if (be->chr_be_change(be->opaque) < 0) {
|
|
error_setg(errp, "Chardev '%s' change failed", chr_new->label);
|
|
chr_new->be = NULL;
|
|
qemu_chr_fe_init(be, chr, &error_abort);
|
|
if (closed_sent) {
|
|
qemu_chr_be_event(chr, CHR_EVENT_OPENED);
|
|
}
|
|
object_unref(OBJECT(chr_new));
|
|
return NULL;
|
|
}
|
|
|
|
/* change successfull, clean up */
|
|
chr_new->handover_yank_instance = false;
|
|
|
|
/*
|
|
* When the old chardev is freed, it should not unregister the yank
|
|
* instance if the new chardev needs it.
|
|
*/
|
|
chr->handover_yank_instance = handover_yank_instance;
|
|
|
|
object_unparent(OBJECT(chr));
|
|
object_property_add_child(get_chardevs_root(), chr_new->label,
|
|
OBJECT(chr_new));
|
|
object_unref(OBJECT(chr_new));
|
|
|
|
ret = g_new0(ChardevReturn, 1);
|
|
if (CHARDEV_IS_PTY(chr_new)) {
|
|
ret->pty = g_strdup(chr_new->filename + 4);
|
|
ret->has_pty = true;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void qmp_chardev_remove(const char *id, Error **errp)
|
|
{
|
|
Chardev *chr;
|
|
|
|
chr = qemu_chr_find(id);
|
|
if (chr == NULL) {
|
|
error_setg(errp, "Chardev '%s' not found", id);
|
|
return;
|
|
}
|
|
if (qemu_chr_is_busy(chr)) {
|
|
error_setg(errp, "Chardev '%s' is busy", id);
|
|
return;
|
|
}
|
|
if (qemu_chr_replay(chr)) {
|
|
error_setg(errp,
|
|
"Chardev '%s' cannot be unplugged in record/replay mode", id);
|
|
return;
|
|
}
|
|
object_unparent(OBJECT(chr));
|
|
}
|
|
|
|
void qmp_chardev_send_break(const char *id, Error **errp)
|
|
{
|
|
Chardev *chr;
|
|
|
|
chr = qemu_chr_find(id);
|
|
if (chr == NULL) {
|
|
error_setg(errp, "Chardev '%s' not found", id);
|
|
return;
|
|
}
|
|
qemu_chr_be_event(chr, CHR_EVENT_BREAK);
|
|
}
|
|
|
|
/*
|
|
* Add a timeout callback for the chardev (in milliseconds), return
|
|
* the GSource object created. Please use this to add timeout hook for
|
|
* chardev instead of g_timeout_add() and g_timeout_add_seconds(), to
|
|
* make sure the gcontext that the task bound to is correct.
|
|
*/
|
|
GSource *qemu_chr_timeout_add_ms(Chardev *chr, guint ms,
|
|
GSourceFunc func, void *private)
|
|
{
|
|
GSource *source = g_timeout_source_new(ms);
|
|
|
|
assert(func);
|
|
g_source_set_callback(source, func, private, NULL);
|
|
g_source_attach(source, chr->gcontext);
|
|
|
|
return source;
|
|
}
|
|
|
|
void qemu_chr_cleanup(void)
|
|
{
|
|
object_unparent(get_chardevs_root());
|
|
}
|
|
|
|
static void register_types(void)
|
|
{
|
|
type_register_static(&char_type_info);
|
|
}
|
|
|
|
type_init(register_types);
|