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spice-qemu-char: Fix flow control in client -> guest direction
In the old spice-vmc device we used to have:last_out = virtio_serial_write(&svc->port, p, MIN);if (last_out > 0) ...
Now in the chardev backend we have:last_out = MIN;...
spice-chardev: listen to frontend guest open / close
Note the vmc_register_interface() in spice_chr_write is left in placein case someone uses spice-chardev with a frontend which does not haveguest open / close notification.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>...
spice: add chardev (v5)
Adding a chardev backend for spice, where spice determines whatto do with it based on the name attribute given during chardev creation.For usage by spice vdagent in conjunction with a properly namedvirtio-serial device, and future smartcard channel usage....