char: move pty chardev in its own file
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Acked-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Marc-André Lureau
parent
1fcb3841d0
commit
c3b7d62097
@ -6,6 +6,7 @@ chardev-obj-y += char-io.o
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chardev-obj-y += char-mux.o
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chardev-obj-y += char-null.o
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chardev-obj-y += char-pipe.o
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chardev-obj-$(CONFIG_POSIX) += char-pty.o
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chardev-obj-y += char-ringbuf.o
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chardev-obj-y += char-socket.o
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chardev-obj-y += char-stdio.o
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300
chardev/char-pty.c
Normal file
300
chardev/char-pty.c
Normal file
@ -0,0 +1,300 @@
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/*
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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 "qapi/error.h"
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#include "qemu-common.h"
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#include "sysemu/char.h"
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#include "io/channel-file.h"
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#include "qemu/sockets.h"
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#include "qemu/error-report.h"
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#include "char-io.h"
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#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
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|| defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
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|| defined(__GLIBC__)
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typedef struct {
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Chardev parent;
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QIOChannel *ioc;
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int read_bytes;
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/* Protected by the Chardev chr_write_lock. */
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int connected;
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guint timer_tag;
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guint open_tag;
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} PtyChardev;
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#define PTY_CHARDEV(obj) OBJECT_CHECK(PtyChardev, (obj), TYPE_CHARDEV_PTY)
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static void pty_chr_update_read_handler_locked(Chardev *chr);
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static void pty_chr_state(Chardev *chr, int connected);
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static gboolean pty_chr_timer(gpointer opaque)
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{
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struct Chardev *chr = CHARDEV(opaque);
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PtyChardev *s = PTY_CHARDEV(opaque);
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qemu_mutex_lock(&chr->chr_write_lock);
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s->timer_tag = 0;
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s->open_tag = 0;
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if (!s->connected) {
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/* Next poll ... */
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pty_chr_update_read_handler_locked(chr);
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}
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qemu_mutex_unlock(&chr->chr_write_lock);
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return FALSE;
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}
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/* Called with chr_write_lock held. */
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static void pty_chr_rearm_timer(Chardev *chr, int ms)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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char *name;
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if (s->timer_tag) {
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g_source_remove(s->timer_tag);
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s->timer_tag = 0;
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}
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if (ms == 1000) {
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name = g_strdup_printf("pty-timer-secs-%s", chr->label);
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s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
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} else {
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name = g_strdup_printf("pty-timer-ms-%s", chr->label);
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s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
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}
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g_source_set_name_by_id(s->timer_tag, name);
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g_free(name);
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}
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/* Called with chr_write_lock held. */
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static void pty_chr_update_read_handler_locked(Chardev *chr)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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GPollFD pfd;
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int rc;
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QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc);
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pfd.fd = fioc->fd;
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pfd.events = G_IO_OUT;
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pfd.revents = 0;
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do {
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rc = g_poll(&pfd, 1, 0);
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} while (rc == -1 && errno == EINTR);
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assert(rc >= 0);
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if (pfd.revents & G_IO_HUP) {
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pty_chr_state(chr, 0);
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} else {
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pty_chr_state(chr, 1);
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}
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}
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static void pty_chr_update_read_handler(Chardev *chr,
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GMainContext *context)
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{
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qemu_mutex_lock(&chr->chr_write_lock);
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pty_chr_update_read_handler_locked(chr);
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qemu_mutex_unlock(&chr->chr_write_lock);
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}
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/* Called with chr_write_lock held. */
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static int char_pty_chr_write(Chardev *chr, const uint8_t *buf, int len)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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if (!s->connected) {
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/* guest sends data, check for (re-)connect */
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pty_chr_update_read_handler_locked(chr);
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if (!s->connected) {
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return 0;
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}
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}
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return io_channel_send(s->ioc, buf, len);
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}
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static GSource *pty_chr_add_watch(Chardev *chr, GIOCondition cond)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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if (!s->connected) {
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return NULL;
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}
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return qio_channel_create_watch(s->ioc, cond);
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}
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static int pty_chr_read_poll(void *opaque)
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{
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Chardev *chr = CHARDEV(opaque);
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PtyChardev *s = PTY_CHARDEV(opaque);
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s->read_bytes = qemu_chr_be_can_write(chr);
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return s->read_bytes;
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}
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static gboolean pty_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
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{
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Chardev *chr = CHARDEV(opaque);
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PtyChardev *s = PTY_CHARDEV(opaque);
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gsize len;
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uint8_t buf[CHR_READ_BUF_LEN];
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ssize_t ret;
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len = sizeof(buf);
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if (len > s->read_bytes) {
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len = s->read_bytes;
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}
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if (len == 0) {
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return TRUE;
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}
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ret = qio_channel_read(s->ioc, (char *)buf, len, NULL);
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if (ret <= 0) {
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pty_chr_state(chr, 0);
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return FALSE;
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} else {
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pty_chr_state(chr, 1);
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qemu_chr_be_write(chr, buf, ret);
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}
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return TRUE;
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}
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static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
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{
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Chardev *chr = CHARDEV(opaque);
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PtyChardev *s = PTY_CHARDEV(opaque);
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s->open_tag = 0;
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qemu_chr_be_generic_open(chr);
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return FALSE;
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}
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/* Called with chr_write_lock held. */
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static void pty_chr_state(Chardev *chr, int connected)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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if (!connected) {
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if (s->open_tag) {
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g_source_remove(s->open_tag);
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s->open_tag = 0;
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}
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remove_fd_in_watch(chr);
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s->connected = 0;
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/* (re-)connect poll interval for idle guests: once per second.
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* We check more frequently in case the guests sends data to
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* the virtual device linked to our pty. */
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pty_chr_rearm_timer(chr, 1000);
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} else {
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if (s->timer_tag) {
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g_source_remove(s->timer_tag);
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s->timer_tag = 0;
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}
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if (!s->connected) {
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g_assert(s->open_tag == 0);
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s->connected = 1;
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s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
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}
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if (!chr->fd_in_tag) {
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chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
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pty_chr_read_poll,
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pty_chr_read,
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chr, NULL);
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}
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}
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}
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static void char_pty_finalize(Object *obj)
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{
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Chardev *chr = CHARDEV(obj);
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PtyChardev *s = PTY_CHARDEV(obj);
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qemu_mutex_lock(&chr->chr_write_lock);
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pty_chr_state(chr, 0);
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object_unref(OBJECT(s->ioc));
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if (s->timer_tag) {
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g_source_remove(s->timer_tag);
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s->timer_tag = 0;
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}
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qemu_mutex_unlock(&chr->chr_write_lock);
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qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
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}
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static void char_pty_open(Chardev *chr,
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ChardevBackend *backend,
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bool *be_opened,
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Error **errp)
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{
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PtyChardev *s;
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int master_fd, slave_fd;
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char pty_name[PATH_MAX];
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char *name;
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master_fd = qemu_openpty_raw(&slave_fd, pty_name);
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if (master_fd < 0) {
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error_setg_errno(errp, errno, "Failed to create PTY");
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return;
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}
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close(slave_fd);
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qemu_set_nonblock(master_fd);
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chr->filename = g_strdup_printf("pty:%s", pty_name);
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error_report("char device redirected to %s (label %s)",
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pty_name, chr->label);
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s = PTY_CHARDEV(chr);
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s->ioc = QIO_CHANNEL(qio_channel_file_new_fd(master_fd));
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name = g_strdup_printf("chardev-pty-%s", chr->label);
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qio_channel_set_name(QIO_CHANNEL(s->ioc), name);
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g_free(name);
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s->timer_tag = 0;
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*be_opened = false;
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}
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static void char_pty_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->open = char_pty_open;
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cc->chr_write = char_pty_chr_write;
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cc->chr_update_read_handler = pty_chr_update_read_handler;
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cc->chr_add_watch = pty_chr_add_watch;
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}
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static const TypeInfo char_pty_type_info = {
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.name = TYPE_CHARDEV_PTY,
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.parent = TYPE_CHARDEV,
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.instance_size = sizeof(PtyChardev),
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.instance_finalize = char_pty_finalize,
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.class_init = char_pty_class_init,
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};
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static void register_types(void)
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{
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type_register_static(&char_pty_type_info);
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}
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type_init(register_types);
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#endif
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258
chardev/char.c
258
chardev/char.c
@ -661,261 +661,6 @@ void qemu_chr_fe_take_focus(CharBackend *b)
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|| defined(__GLIBC__)
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#define HAVE_CHARDEV_SERIAL 1
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#define HAVE_CHARDEV_PTY 1
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typedef struct {
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Chardev parent;
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QIOChannel *ioc;
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int read_bytes;
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/* Protected by the Chardev chr_write_lock. */
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int connected;
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guint timer_tag;
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guint open_tag;
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} PtyChardev;
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#define PTY_CHARDEV(obj) OBJECT_CHECK(PtyChardev, (obj), TYPE_CHARDEV_PTY)
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static void pty_chr_update_read_handler_locked(Chardev *chr);
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static void pty_chr_state(Chardev *chr, int connected);
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static gboolean pty_chr_timer(gpointer opaque)
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{
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struct Chardev *chr = CHARDEV(opaque);
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PtyChardev *s = PTY_CHARDEV(opaque);
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qemu_mutex_lock(&chr->chr_write_lock);
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s->timer_tag = 0;
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s->open_tag = 0;
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if (!s->connected) {
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/* Next poll ... */
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pty_chr_update_read_handler_locked(chr);
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}
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qemu_mutex_unlock(&chr->chr_write_lock);
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return FALSE;
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}
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/* Called with chr_write_lock held. */
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static void pty_chr_rearm_timer(Chardev *chr, int ms)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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char *name;
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if (s->timer_tag) {
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g_source_remove(s->timer_tag);
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s->timer_tag = 0;
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}
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if (ms == 1000) {
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name = g_strdup_printf("pty-timer-secs-%s", chr->label);
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s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
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} else {
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name = g_strdup_printf("pty-timer-ms-%s", chr->label);
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s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
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}
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g_source_set_name_by_id(s->timer_tag, name);
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g_free(name);
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}
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/* Called with chr_write_lock held. */
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static void pty_chr_update_read_handler_locked(Chardev *chr)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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GPollFD pfd;
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int rc;
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QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc);
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pfd.fd = fioc->fd;
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pfd.events = G_IO_OUT;
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pfd.revents = 0;
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do {
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rc = g_poll(&pfd, 1, 0);
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} while (rc == -1 && errno == EINTR);
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assert(rc >= 0);
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if (pfd.revents & G_IO_HUP) {
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pty_chr_state(chr, 0);
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} else {
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pty_chr_state(chr, 1);
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}
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}
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static void pty_chr_update_read_handler(Chardev *chr,
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GMainContext *context)
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{
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qemu_mutex_lock(&chr->chr_write_lock);
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pty_chr_update_read_handler_locked(chr);
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qemu_mutex_unlock(&chr->chr_write_lock);
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}
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/* Called with chr_write_lock held. */
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static int char_pty_chr_write(Chardev *chr, const uint8_t *buf, int len)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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if (!s->connected) {
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/* guest sends data, check for (re-)connect */
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pty_chr_update_read_handler_locked(chr);
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if (!s->connected) {
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return 0;
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}
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}
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return io_channel_send(s->ioc, buf, len);
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}
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static GSource *pty_chr_add_watch(Chardev *chr, GIOCondition cond)
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{
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PtyChardev *s = PTY_CHARDEV(chr);
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if (!s->connected) {
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return NULL;
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}
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return qio_channel_create_watch(s->ioc, cond);
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}
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static int pty_chr_read_poll(void *opaque)
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{
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Chardev *chr = CHARDEV(opaque);
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PtyChardev *s = PTY_CHARDEV(opaque);
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s->read_bytes = qemu_chr_be_can_write(chr);
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return s->read_bytes;
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}
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static gboolean pty_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
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{
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Chardev *chr = CHARDEV(opaque);
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PtyChardev *s = PTY_CHARDEV(opaque);
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gsize len;
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uint8_t buf[CHR_READ_BUF_LEN];
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ssize_t ret;
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len = sizeof(buf);
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if (len > s->read_bytes)
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len = s->read_bytes;
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if (len == 0) {
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return TRUE;
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}
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ret = qio_channel_read(s->ioc, (char *)buf, len, NULL);
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if (ret <= 0) {
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pty_chr_state(chr, 0);
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return FALSE;
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} else {
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pty_chr_state(chr, 1);
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qemu_chr_be_write(chr, buf, ret);
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}
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return TRUE;
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}
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static gboolean qemu_chr_be_generic_open_func(gpointer opaque)
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{
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Chardev *chr = CHARDEV(opaque);
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PtyChardev *s = PTY_CHARDEV(opaque);
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s->open_tag = 0;
|
||||
qemu_chr_be_generic_open(chr);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* Called with chr_write_lock held. */
|
||||
static void pty_chr_state(Chardev *chr, int connected)
|
||||
{
|
||||
PtyChardev *s = PTY_CHARDEV(chr);
|
||||
|
||||
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(chr, s->ioc,
|
||||
pty_chr_read_poll,
|
||||
pty_chr_read,
|
||||
chr, NULL);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void char_pty_finalize(Object *obj)
|
||||
{
|
||||
Chardev *chr = CHARDEV(obj);
|
||||
PtyChardev *s = PTY_CHARDEV(obj);
|
||||
|
||||
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);
|
||||
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
|
||||
}
|
||||
|
||||
static void char_pty_open(Chardev *chr,
|
||||
ChardevBackend *backend,
|
||||
bool *be_opened,
|
||||
Error **errp)
|
||||
{
|
||||
PtyChardev *s;
|
||||
int master_fd, slave_fd;
|
||||
char pty_name[PATH_MAX];
|
||||
char *name;
|
||||
|
||||
master_fd = qemu_openpty_raw(&slave_fd, pty_name);
|
||||
if (master_fd < 0) {
|
||||
error_setg_errno(errp, errno, "Failed to create PTY");
|
||||
return;
|
||||
}
|
||||
|
||||
close(slave_fd);
|
||||
qemu_set_nonblock(master_fd);
|
||||
|
||||
chr->filename = g_strdup_printf("pty:%s", pty_name);
|
||||
error_report("char device redirected to %s (label %s)",
|
||||
pty_name, chr->label);
|
||||
|
||||
s = PTY_CHARDEV(chr);
|
||||
s->ioc = QIO_CHANNEL(qio_channel_file_new_fd(master_fd));
|
||||
name = g_strdup_printf("chardev-pty-%s", chr->label);
|
||||
qio_channel_set_name(QIO_CHANNEL(s->ioc), name);
|
||||
g_free(name);
|
||||
s->timer_tag = 0;
|
||||
*be_opened = false;
|
||||
}
|
||||
|
||||
static void char_pty_class_init(ObjectClass *oc, void *data)
|
||||
{
|
||||
ChardevClass *cc = CHARDEV_CLASS(oc);
|
||||
|
||||
cc->open = char_pty_open;
|
||||
cc->chr_write = char_pty_chr_write;
|
||||
cc->chr_update_read_handler = pty_chr_update_read_handler;
|
||||
cc->chr_add_watch = pty_chr_add_watch;
|
||||
}
|
||||
|
||||
static const TypeInfo char_pty_type_info = {
|
||||
.name = TYPE_CHARDEV_PTY,
|
||||
.parent = TYPE_CHARDEV,
|
||||
.instance_size = sizeof(PtyChardev),
|
||||
.instance_finalize = char_pty_finalize,
|
||||
.class_init = char_pty_class_init,
|
||||
};
|
||||
|
||||
static void tty_serial_init(int fd, int speed,
|
||||
int parity, int data_bits, int stop_bits)
|
||||
@ -2175,9 +1920,6 @@ static void register_types(void)
|
||||
#ifdef HAVE_CHARDEV_PARPORT
|
||||
type_register_static(&char_parallel_type_info);
|
||||
#endif
|
||||
#ifdef HAVE_CHARDEV_PTY
|
||||
type_register_static(&char_pty_type_info);
|
||||
#endif
|
||||
|
||||
/* this must be done after machine init, since we register FEs with muxes
|
||||
* as part of realize functions like serial_isa_realizefn when -nographic
|
||||
|
||||
Loading…
Reference in New Issue
Block a user