[Qemu-devel] [PULL for usb-next]: Add support for live-migration to usb-redir (v2)

[Qemu-devel] [PULL for usb-next]: Add support for live-migration to usb-redir (v2)

[Hans de Goede]

Hi Gerd,

I'm very happy to present to you a pull-request for usb-redir
live-migration support. I've tested this combined with Spice
seamless migration, and it can successful:
1) migrate a vm while running "dd if=/dev/zero of=/dev/sdb1 bs=32K"
inside the guest with sdb being a redirect USB-2 mass storage device.
2) migrate a vm while running camorama inside the vm showing a 720p
video from a redirected USB-2 webcam at 30 fps!

Note this is based on usb-next rather then master / usb.62,
since one of my patches would otherwise conflict with your recent
ehci changes.

Changes in v2:
- As discussed drop the "usb: Migrate over device speed and speedmask" patch

The following changes since commit a44fd2e0c66b2276f586948702e5ebc7136fdb73:

   usb-host: allow emulated (non-async) control requests without USBPacket (2012-09-06 12:03:41 +0200)

are available in the git repository at:

   git://people.freedesktop.org/~jwrdegoede/qemu usb-for-gerd

for you to fetch changes up to 6ef0b771704ca898a44c1f9ea41ab98590fc2e84:

   usb-redir: Add chardev open / close debug logging (2012-09-07 21:27:16 +0200)

----------------------------------------------------------------
Hans de Goede (8):
       ehci: Don't set seen to 0 when removing unseen queue-heads
       ehci: Walk async schedule before and after migration
       ehci: Don't process too much frames in 1 timer tick
       usb-redir: Change cancelled packet code into a generic packet-id queue
       usb-redir: Add an already_in_flight packet-id queue
       usb-redir: Store max_packet_size in endp_data
       usb-redir: Add support for migration
       usb-redir: Add chardev open / close debug logging

  hw/usb/hcd-ehci.c |  61 ++++++-
  hw/usb/redirect.c | 500 ++++++++++++++++++++++++++++++++++++++++++++++++++----
  2 files changed, 522 insertions(+), 39 deletions(-)

Thanks & Regards,

Hans