Some frontends know when the guest has opened the "channel" and is actively
listening to it, for example virtio-serial. This patch adds 2 new qemu-chardev
functions which can be used by frontends to signal guest open / close, and
allows interested backends to listen to this.
Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
qemu-char.c | 17 +++++++++++++++++
qemu-char.h | 4 ++++
2 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/qemu-char.c b/qemu-char.c
index 31c9e79..7ec7196 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -476,6 +476,9 @@ static CharDriverState *qemu_chr_open_mux(CharDriverState
*drv)
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_guest_open = NULL;
+ chr->chr_guest_close = NULL;
/* Muxes are always open on creation */
qemu_chr_generic_open(chr);
@@ -2575,6 +2578,20 @@ void qemu_chr_set_echo(struct CharDriverState *chr, bool
echo)
}
}
+void qemu_chr_guest_open(struct CharDriverState *chr)
+{
+ if (chr->chr_guest_open) {
+ chr->chr_guest_open(chr);
+ }
+}
+
+void qemu_chr_guest_close(struct CharDriverState *chr)
+{
+ if (chr->chr_guest_close) {
+ chr->chr_guest_close(chr);
+ }
+}
+
void qemu_chr_close(CharDriverState *chr)
{
QTAILQ_REMOVE(&chardevs, chr, next);
diff --git a/qemu-char.h b/qemu-char.h
index 56d9954..d2f5e5f 100644
--- a/qemu-char.h
+++ b/qemu-char.h
@@ -65,6 +65,8 @@ struct CharDriverState {
void (*chr_close)(struct CharDriverState *chr);
void (*chr_accept_input)(struct CharDriverState *chr);
void (*chr_set_echo)(struct CharDriverState *chr, bool echo);
+ void (*chr_guest_open)(struct CharDriverState *chr);
+ void (*chr_guest_close)(struct CharDriverState *chr);
void *opaque;
QEMUBH *bh;
char *label;
@@ -78,6 +80,8 @@ CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
void (*init)(struct CharDriverState *s));
CharDriverState *qemu_chr_open(const char *label, const char *filename, void
(*init)(struct CharDriverState *s));
void qemu_chr_set_echo(struct CharDriverState *chr, bool echo);
+void qemu_chr_guest_open(struct CharDriverState *chr);
+void qemu_chr_guest_close(struct CharDriverState *chr);
void qemu_chr_close(CharDriverState *chr);
void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
--
1.7.3.2
