[Qemu-devel] [PATCH 0/3] IDE and live migration fun

[Kevin Wolf]

Patch 1 describes the real problem that I was going to solve. While fixing
this, I stumbled across some more migration problems that are included in this
series. Some refactoring is still left to do after this, but I'd prefer to
keep this series with the hard stuff short.

This is the test case that I was using:

$ cat blkdebug.conf
[inject-error]
state = "2"
event = "read_aio"
errno = "7"
immediately = "off"
once = "on"

[set-state]
state = "1"
event = "read_aio"
new_state = "2"

[set-state]
state = "2"
event = "read_aio"
new_state = "3"

$ x86_64-softmmu/qemu-system-x86_64 -drive 
file=blkdebug:blkdebug.conf:disk.qcow2,rerror=stop,werror=stop -incoming 
tcp::1028
$ x86_64-softmmu/qemu-system-x86_64 -drive 
file=blkdebug:blkdebug.conf:disk.qcow2,rerror=stop,werror=stop
(qemu) migrate tcp::1028

Please note that you need to use a qcow2 image, or the blkdebug events won't be
triggered. Expected result: The very first read from the disk (BIOS reading
the MBR) fails and stops the VM. I migrate while the VM is stopped, so that the
request is queued for resubmission. After continuing, the VM should work just
as normal.

Kevin Wolf (3):
  ide: Split error status from status register
  ide: Fix ide_drive_pio_state_needed()
  ide: Add forgotten VMSTATE_END_OF_LIST in subsection

 hw/ide/core.c     |   32 +++++++++++++++++++++-
 hw/ide/internal.h |    8 ++++++
 hw/ide/pci.c      |   73 +++++++++++++++++++++++++++++++++++++++++++++++-----
 hw/ide/pci.h      |    4 +++
 4 files changed, 108 insertions(+), 9 deletions(-)

-- 
1.7.5.2