Hans de Goede <hdego...@redhat.com> writes:
> Add tracking of the fe_open state to struct CharDriverState.
>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
> ---
> include/char/char.h | 1 +
> qemu-char.c | 2 ++
> 2 files changed, 3 insertions(+)
>
> diff --git a/include/char/char.h b/include/char/char.h
> index dd8f39a..3174575 100644
> --- a/include/char/char.h
> +++ b/include/char/char.h
> @@ -75,6 +75,7 @@ struct CharDriverState {
> char *label;
> char *filename;
> int be_open;
> + int fe_open;
> int avail_connections;
> QemuOpts *opts;
> QTAILQ_ENTRY(CharDriverState) next;
> diff --git a/qemu-char.c b/qemu-char.c
> index 55795d7..554d72f 100644
> --- a/qemu-char.c
> +++ b/qemu-char.c
> @@ -3385,6 +3385,7 @@ void qemu_chr_fe_set_echo(struct CharDriverState *chr,
> bool echo)
>
> void qemu_chr_fe_open(struct CharDriverState *chr)
> {
> + chr->fe_open = 1;
> if (chr->chr_guest_open) {
> chr->chr_guest_open(chr);
> }
> @@ -3392,6 +3393,7 @@ void qemu_chr_fe_open(struct CharDriverState *chr)
>
> void qemu_chr_fe_close(struct CharDriverState *chr)
> {
> + chr->fe_open = 0;
Even though this gets rewritten later on, you should avoid calling the
callback when open is called when fe_open=1. Something like
if (!chr->fe_open) {
return;
}
Then later when this becomes set_fe_open() the backend doesn't need to
deal with double open/close.
Regards,
Anthony Liguori
> if (chr->chr_guest_close) {
> chr->chr_guest_close(chr);
> }
> --
> 1.8.1.4
