Re: [Qemu-devel] [PATCH v11 00/34] modify boot order of guest, and take effect after rebooting

[Gonglei <arei.gonglei@huawei.com>]

On 2014/10/7 16:00, Gonglei (Arei) wrote:

> From: Gonglei <arei.gonglei@huawei.com>
> 
> Changes since v10:
>  1. add handler for virtio-blk-pci/s390/ccw in PATCH 28.
>  2. add especial bootidnex setter/getter functions for usb-storage
>     device in PATCH 29.
>  3. add bootindex qom property for nvma and ne2k_isa devices,
>     avoid regrassion in PATCH 30.
>  4. change fprintf to error_report in bootdevice.c in PATCH 34.
>  5. rebase on the latest qemu master tree.
>  6. add 'Reviewed-by' in other patches. (Thanks, Gerd)
> 


Hi, Gerd

Could you please review the v11 and consider to merge this series in your tree?
I have no idea which maintainer can apply this series. It seems that only you
and Eduardo  interested in and reviewed this patch series at present. :(

Any help will be appreciated! This patch series has crossed two versions of QEMU,
now is the soft freeze period of qemu-2.2 again.

Best regards,
-Gonglei

> Changes since v9:
>  - rework del_boot_device_path() for code sharing more better.(Gerd)
>    Now, it has only one delete funciton, which work for update fw_cfg list
>    both setting bootindex and hot-unplugging devices.
> 
> Changes since v8:
>  - fix wrong rebase on PATCH 14/30 and 15/30.
> 
> Changes since v7:
>  - IDE unit's value is set too later, so change IDE to not use
>    device_add_bootindex_property(). IDE has its own getter/setter and a call
>    to add_boot_device_path() on realize(). PATCH 25/30, 28/30 (Eduardo)
>  - rewrite PATCH 5/30 using g_strcmp0. (Eduardo)
>  - set 'ide_device_type_info.instance_init = ide_dev_instance_init'
>    for all ide devices. PATCH 25/30 (Eduardo)
>  - set 'scsi_device_type_info.instance_init = scsi_dev_instance_init'
>    for all scsi devices. PATCH 24/30
>  - initialize bootindex property to -1 in device_add_bootindex_property,
>    so there is no need to duplicate the call to init bootindex with -1
>    in all devices. (Gerd)
> 
>  Thanks for review!
> 
> Changes since v6:
>  - move all bootindex/boot-device code to a new file, named bootdevice.c.
>  - introduce a getter/setter wrapper for all device.
>  - call add_boot_device_path in setter bootindx callback function.
>  - call del_boot_device_path in finalize bootindex qom callback function.
>  - other bugfixes.
> 
>  Thanks for Eduardo's good suggestion! And other guys, thanks too!
> 
> Changes since v5:
>  rework by Gerd and Markus's suggestion(Thanks a lot):
>  - Set/update bootindex on reset instead of realize/init.
>  - Switch the property from qdev to qom, then use the set
>    callback to also update the fw_cfg file.
>  - using qom-set instead of 'set-bootindex' qmp interface,
>    remove it.
> 
>  This is a huge change relative to the previous version. 
> 
> Changes since v4:
>  - using error_setg() instead of qerror_report() in patch 1/8.
>  - call del_boot_device_path() from device_finalize() instead
>   of placing it into each individual device in patch 4/8.
> 
> Changes since v3:
>  - rework del_* and modify_* function, because of virtio devices' specialation.
>    For example, virtio-net's id is NULL, and its parent virtio-net-pci's id was assigned.
>    Though the global fw_boot_order stored the virtio-net device.
>  - call dell_boot_device_path in each individual device avoiding waste resouce.
>  - introduce qmp "query-bootindex" command
>  - introcude hmp "info bootindex" command
>  - Fixes by Eric's reviewing comments, thanks.
> 
> Changes since v2:
>  *address Gerd's reviewing suggestion:
>  - use the old entry's suffix, if the caller do not pass it in.
>  - call del_boot_device_path() from device_finalize() instead
>    of placing it into each individual device.
> 
> Changes since v1:
>  *rework by Gerd's suggestion:
>  - split modify and del fw_boot_order for single function.
>  - change modify bootindex's realization which simply lookup
>    the device and modify the bootindex. if the new bootindex
>    has already used by another device just throw an error.
>  - change to del_boot_device_path(DeviceState *dev) and simply delete all
>    entries belonging to the device.
> 
> Sometimes, we want to modify boot order of a guest, but no need to
> shutdown it. We can call dynamic changing bootindex of a guest, which
> can be assured taking effect just after the guest rebooting.
> 
> For example, in P2V scene, we boot a guest and then attach a
> new system disk, for copying some thing. We want to assign the
> new disk as the booting disk, which means its bootindex=1.
> 
> Different nics can be assigen different bootindex dynamically
> also make sense.
> 
> This patch series do belows works:
>  1. add an fw_cfg_machine_reset() assure re-read global fw_boot_order list
>    during vm rebooting.
>  2. switch the property from qdev to qom, then use the set
>     callback to also update the fw_cfg file.
> 
>  Note:
>  - Do not support change pci option rom's bootindex.
> 
> For Convenience of testing, my test case based on Andreas's patch series:
>  [PATCH qom-next 0/4] qom: HMP commands to replace info qtree
>  http://thread.gmane.org/gmane.comp.emulators.qemu/271513
> However, there is no direct relation with this bootindex patch series.
> 
> $./qemu-system-x86_64 -enable-kvm -m 4096 -smp 4 -name redhat6.2 -drive \
> file=/home/win7_32_2U,if=none,id=drive-ide0-0-0 -device ide-hd,bus=ide.0,\
> unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -drive \
> file=/home/rhel-server-7.0-x86_64-dvd.iso,if=none,id=drive-ide0-0-1 \
> -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=4 \
> -vnc 0.0.0.0:10 -netdev type=user,id=net0 -device virtio-net-pci,netdev=net0,bootindex=3,id=nic1 \
> -drive file=/mnt/sdb/gonglei/image/virtio-win-1.5.3.vfd,if=none,id=drive-fdc0-0-0,format=raw \
> -device isa-fdc,driveA=drive-fdc0-0-0,bootindexA=5,id=floppy1 -qmp unix:/tmp/qmp,server,nowait \
> -monitor stdio -netdev type=user,id=net1 -device e1000,netdev=net1,bootindex=2,id=nic \
> -boot menu=on -device virtio-scsi-pci,id=scsi0 -drive file=/home/suse11_sp3_32,if=none,\
> id=drive-scsi0-0-0-0,format=raw,cache=none,aio=native \
> -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=8
> QEMU 2.1.50 monitor - type 'help' for more information
> (qemu) qom-get nic1 bootindex
> 3 (0x3)
> (qemu) qom-set nic1 bootindex 3
> The bootindex 3 has already been used
> (qemu) qom-set nic1 bootindex 0
> (qemu) qom-set floppy1 bootindexA 3
> (qemu) system_reset
> (qemu) qom-get nic1 bootindex
> 0 (0x0)
> (qemu) qom-get scsi0-0-0-0 bootindex
> 8 (0x8)
> (qemu) qom-set scsi0-0-0-0 bootindex 0
> The bootindex 0 has already been used
> (qemu) qom-set nic1 bootindex -1
> (qemu) qom-set scsi0-0-0-0 bootindex 0
> (qemu) qom-get scsi0-0-0-0 bootindex
> 0 (0x0)
> (qemu)
> 
> 
> Gonglei (34):
>   bootdevice: move bootdevice related code to new file bootdevice.c
>   bootindex: add check bootindex function
>   bootindex: add del_boot_device_path function
>   fw_cfg: add fw_cfg_machine_reset function
>   bootindex: rework add_boot_device_path function
>   bootindex: support to set a existent device's bootindex to -1
>   bootindex: add a setter/getter functions wrapper for bootindex
>     property
>   virtio-net: add bootindex to qom property
>   e1000: add bootindex to qom property
>   eepro100: add bootindex to qom property
>   ne2000: add bootindex to qom property
>   pcnet: add bootindex to qom property
>   rtl8139: add bootindex to qom property
>   spapr_lian: add bootindex to qom property
>   vmxnet3: add bootindex to qom property
>   usb-net: add bootindex to qom property
>   net: remove bootindex property from qdev to qom
>   virtio-net: alias bootindex property explicitly for
>     virt-net-pci/ccw/s390
>   host-libusb: remove bootindex property from qdev to qom
>   pci-assign: remove bootindex property from qdev to qom
>   vfio: remove bootindex property from qdev to qom
>   redirect: remove bootindex property from qdev to qom
>   isa-fdc: remove bootindexA/B property from qdev to qom
>   scsi: add bootindex to qom property
>   ide: add bootindex to qom property
>   virtio-blk: add bootindex to qom property
>   block: remove bootindex property from qdev to qom
>   virtio-blk: alias bootindex property explicitly for
>     virt-blk-pci/ccw/s390
>   usb-storage: add bootindex to qom property
>   nvma: ide: add bootindex to qom property
>   ide: add calling add_boot_device_patch in bootindex setter function
>   bootindex: move calling add_boot_device_patch to bootindex setter
>     function
>   bootindex: delete bootindex when device is removed
>   bootindex: change fprintf to error_report
> 
>  Makefile.target            |   2 +-
>  bootdevice.c               | 258 +++++++++++++++++++++++++++++++++++++++++++++
>  hw/block/fdc.c             |  18 +++-
>  hw/block/nvme.c            |  44 ++++++++
>  hw/block/virtio-blk.c      |   5 +-
>  hw/i386/kvm/pci-assign.c   |  14 ++-
>  hw/ide/qdev.c              |  47 +++++++++
>  hw/misc/vfio.c             |  13 ++-
>  hw/net/e1000.c             |  12 ++-
>  hw/net/eepro100.c          |  13 ++-
>  hw/net/lance.c             |  12 +++
>  hw/net/ne2000-isa.c        |  44 ++++++++
>  hw/net/ne2000.c            |  14 ++-
>  hw/net/pcnet-pci.c         |  12 +++
>  hw/net/pcnet.c             |   2 -
>  hw/net/pcnet.h             |   1 -
>  hw/net/rtl8139.c           |  12 ++-
>  hw/net/spapr_llan.c        |  12 ++-
>  hw/net/virtio-net.c        |   5 +-
>  hw/net/vmxnet3.c           |  10 +-
>  hw/nvram/fw_cfg.c          |  55 +++++++++-
>  hw/s390x/s390-virtio-bus.c |   4 +
>  hw/s390x/virtio-ccw.c      |   4 +
>  hw/scsi/scsi-bus.c         |  14 ++-
>  hw/scsi/scsi-disk.c        |   2 -
>  hw/scsi/scsi-generic.c     |   4 -
>  hw/usb/dev-network.c       |  11 +-
>  hw/usb/dev-storage.c       |  52 +++++++++
>  hw/usb/host-libusb.c       |  13 ++-
>  hw/usb/redirect.c          |  13 ++-
>  hw/virtio/virtio-pci.c     |   4 +
>  include/hw/block/block.h   |   1 -
>  include/hw/nvram/fw_cfg.h  |   2 +
>  include/net/net.h          |   3 +-
>  include/sysemu/sysemu.h    |   6 ++
>  vl.c                       | 118 +--------------------
>  36 files changed, 690 insertions(+), 166 deletions(-)
>  create mode 100644 bootdevice.c
>