Alon, It is a bug that I modified for printing channel. BTW, can a spice channel be brought up or down based on a request from a spice client? The reason that I am asking for such a question is because the printing channel might be brought up based on a configuration policy. I would like to know if a spice channel can be brought up dynamically during the run time.
-----Original Message----- From: Alon Levy [mailto:al...@redhat.com] Sent: Friday, March 30, 2012 4:16 AM To: Charles.Tsai-蔡清海-研究發展部 Cc: spice-devel@lists.freedesktop.org Subject: Re: Read data out of the Virtqueue On Thu, Mar 29, 2012 at 09:42:32AM +0000, Charles.Tsai-蔡清海-研究發展部 wrote: > Alon, > > Forget my previous mail. When I dig into the vdservice, I found there was one > bug to check the overlay I/O status after calling the VirtIO write function. > After I fixed the bug, I can see more printing raw data inside the Qemu now. > Although I still find some issues, hopefully I can fix it as I debug more > codes in both spice client and spice server. Thank you for your time. Great that you managed to progress. Can you send a patch for the vdservice issue? Is it a bug in the original or just in the one you modified for printer channel? > > -----Original Message----- > From: Charles.Tsai-蔡清海-研究發展部 > Sent: Wednesday, March 28, 2012 6:07 PM > To: 'Alon Levy' > Cc: spice-devel@lists.freedesktop.org > Subject: Read data out of the Virtqueue > > Alon, > > My printer driver can write the printing raw data into virtIO driver. But I > cannot see the found the printing raw data in the spice server. For the > vdagent, I found the following code segment which is a callback to read the > data from the vdi_port. Do I need to add a similar code to read the data from > the Virtio? > > In Qemu, I do see vmc_write is called when the printer driver writes the > printing raw data into the virtIOdevice. > Consequently, function "spicevmc_red_channel_send_item" should be called to > send the payload to the spice client. But I did not see function > "spicevmc_red_channel_send_item" is called either. It looks like the printing > rawa data is still inside the VirtIO queue. What function I need to add so as > to pull the data out of the VirtIO queue? > > ====================================================================== > ================= struct SpiceCharDeviceState > vdagent_char_device_state = { > .wakeup = &vdagent_char_device_wakeup, }; > > > void vdagent_char_device_wakeup(SpiceCharDeviceInstance *sin) { > while (read_from_vdi_port()); > } _______________________________________________ Spice-devel mailing list Spice-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/spice-devel
