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authorHans de Goede <hdegoede@redhat.com>2011-03-24 11:12:02 +0100
committerAmit Shah <amit.shah@redhat.com>2011-04-28 11:02:21 +0530
commit7c32c4feebd962960fb160291a426b983e0ae668 (patch)
tree1757d459bbb1202e0e2a377862805e49fb9c0437 /qemu-char.c
parenta7d3970d0635ebce1412736e7aaf11d387919dc8 (diff)
chardev: Allow frontends to notify backends of guest open / close
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 <hdegoede@redhat.com> Reviewed-by: Alon Levy <alevy@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com>
Diffstat (limited to 'qemu-char.c')
-rw-r--r--qemu-char.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/qemu-char.c b/qemu-char.c
index 03858d4ef7..710d98ffc4 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -480,6 +480,9 @@ 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);
@@ -2579,6 +2582,20 @@ 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);