[Xen-users] xen-4.9.0 and cdrom block-attach/-detach

[squidmobile@xxxxxxxxxxxxxxx]

22 oct 2017

greetings xen-users@xxxxxxxxxxxxx,

i ran into a problem adding and removing cdrom images from a
xen-4.9.0 vm.  i put a series of commands into a shell script, ran
a script command, and captured the output from ksh -xv.

i figure these errors propagate through to the vm so that it sees
neither the disk removal nor the new disk attachment.

i noticed the cdrom did NOT add a .../script = entry similar to the
disk test, so i ran an experiment and manually added a similar
xenstore entry.  however, the block-detach commmand failed as
before.

any comments or suggestions?

thanks.
frank smith


Script started on Sun 22 Oct 2017 11:01:57 AM EDT
xanadu(root) 1 $
xanadu(root) 1 $
xanadu(root) 1 $ ksh -xv /tmp/gigo

xl block-list <vm-name>


+ xl block-list <vm-name>
Vdev  BE  handle state evt-ch ring-ref BE-path
51712 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51712
51728 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51728
xenstore-ls -f | grep '/102/'


+ grep /102/
+ xenstore-ls -f
/local/domain/0/device-model/102/backends = ""
/local/domain/0/device-model/102/backends/console = ""
/local/domain/0/device-model/102/backends/vkbd = ""
/local/domain/0/device-model/102/backends/qdisk = ""
/local/domain/0/device-model/102/backends/qusb = ""
/local/domain/0/device-model/102/state = "running"
/local/domain/0/device-model/102/physmap = ""
/local/domain/0/device-model/102/physmap/1f000000 = ""
/local/domain/0/device-model/102/physmap/1f000000/start_addr = "f1000000"
/local/domain/0/device-model/102/physmap/1f000000/size = "1000000"
/local/domain/0/device-model/102/physmap/1f000000/name = "vga.vram"
/local/domain/0/backend/vbd/102/51712 = ""
/local/domain/0/backend/vbd/102/51712/frontend = 
"/local/domain/102/device/vbd/51712"
/local/domain/0/backend/vbd/102/51712/params = "/dev/vg_xen/xen_<vm-name>_c"
/local/domain/0/backend/vbd/102/51712/script = "/etc/xen/scripts/block"
/local/domain/0/backend/vbd/102/51712/frontend-id = "102"
/local/domain/0/backend/vbd/102/51712/online = "1"
/local/domain/0/backend/vbd/102/51712/removable = "0"
/local/domain/0/backend/vbd/102/51712/bootable = "1"
/local/domain/0/backend/vbd/102/51712/state = "2"
/local/domain/0/backend/vbd/102/51712/dev = "xvda"
/local/domain/0/backend/vbd/102/51712/type = "phy"
/local/domain/0/backend/vbd/102/51712/mode = "w"
/local/domain/0/backend/vbd/102/51712/device-type = "disk"
/local/domain/0/backend/vbd/102/51712/discard-enable = "1"
/local/domain/0/backend/vbd/102/51712/max-ring-page-order = "4"
/local/domain/0/backend/vbd/102/51712/physical-device = "fa:b"
/local/domain/0/backend/vbd/102/51712/physical-device-path = "/dev/dm-11"
/local/domain/0/backend/vbd/102/51712/hotplug-status = "connected"
/local/domain/0/backend/vbd/102/51728 = ""
/local/domain/0/backend/vbd/102/51728/frontend = 
"/local/domain/102/device/vbd/51728"
/local/domain/0/backend/vbd/102/51728/params = 
"/scratch01/gigo.d1/test.xen/<vm-name>.d"
/local/domain/0/backend/vbd/102/51728/script = "/etc/xen/scripts/block"
/local/domain/0/backend/vbd/102/51728/frontend-id = "102"
/local/domain/0/backend/vbd/102/51728/online = "1"
/local/domain/0/backend/vbd/102/51728/removable = "0"
/local/domain/0/backend/vbd/102/51728/bootable = "1"
/local/domain/0/backend/vbd/102/51728/state = "2"
/local/domain/0/backend/vbd/102/51728/dev = "xvdb"
/local/domain/0/backend/vbd/102/51728/type = "phy"
/local/domain/0/backend/vbd/102/51728/mode = "w"
/local/domain/0/backend/vbd/102/51728/device-type = "disk"
/local/domain/0/backend/vbd/102/51728/discard-enable = "1"
/local/domain/0/backend/vbd/102/51728/max-ring-page-order = "4"
/local/domain/0/backend/vbd/102/51728/node = "/dev/loop1"
/local/domain/0/backend/vbd/102/51728/physical-device = "7:1"
/local/domain/0/backend/vbd/102/51728/physical-device-path = "/dev/loop1"
/local/domain/0/backend/vbd/102/51728/hotplug-status = "connected"
/local/domain/0/backend/vkbd/102/0 = ""
/local/domain/0/backend/vkbd/102/0/frontend = "/local/domain/102/device/vkbd/0"
/local/domain/0/backend/vkbd/102/0/frontend-id = "102"
/local/domain/0/backend/vkbd/102/0/online = "1"
/local/domain/0/backend/vkbd/102/0/state = "2"
/local/domain/0/backend/vkbd/102/0/feature-abs-pointer = "1"
/local/domain/0/backend/vkbd/102/0/hotplug-status = "connected"
/local/domain/0/backend/console/102/0 = ""
/local/domain/0/backend/console/102/0/frontend = "/local/domain/102/console"
/local/domain/0/backend/console/102/0/frontend-id = "102"
/local/domain/0/backend/console/102/0/online = "1"
/local/domain/0/backend/console/102/0/state = "1"
/local/domain/0/backend/console/102/0/protocol = "vt100"
/local/domain/102/vm = "/vm/2f2e978c-f17e-4353-a0c7-ec3022c62ba3"
/local/domain/102/name = "<vm-name>"
/local/domain/102/cpu = ""
/local/domain/102/cpu/0 = ""
/local/domain/102/cpu/0/availability = "online"
/local/domain/102/memory = ""
/local/domain/102/memory/static-max = "524288"
/local/domain/102/memory/target = "507904"
/local/domain/102/memory/videoram = "16384"
/local/domain/102/device = ""
/local/domain/102/device/suspend = ""
/local/domain/102/device/suspend/event-channel = ""
/local/domain/102/device/vbd = ""
/local/domain/102/device/vbd/51712 = ""
/local/domain/102/device/vbd/51712/backend = 
"/local/domain/0/backend/vbd/102/51712"
/local/domain/102/device/vbd/51712/backend-id = "0"
/local/domain/102/device/vbd/51712/state = "1"
/local/domain/102/device/vbd/51712/virtual-device = "51712"
/local/domain/102/device/vbd/51712/device-type = "disk"
/local/domain/102/device/vbd/51728 = ""
/local/domain/102/device/vbd/51728/backend = 
"/local/domain/0/backend/vbd/102/51728"
/local/domain/102/device/vbd/51728/backend-id = "0"
/local/domain/102/device/vbd/51728/state = "1"
/local/domain/102/device/vbd/51728/virtual-device = "51728"
/local/domain/102/device/vbd/51728/device-type = "disk"
/local/domain/102/device/vkbd = ""
/local/domain/102/device/vkbd/0 = ""
/local/domain/102/device/vkbd/0/backend = "/local/domain/0/backend/vkbd/102/0"
/local/domain/102/device/vkbd/0/backend-id = "0"
/local/domain/102/device/vkbd/0/state = "1"
/local/domain/102/control = ""
/local/domain/102/control/shutdown = ""
/local/domain/102/control/feature-poweroff = ""
/local/domain/102/control/feature-reboot = ""
/local/domain/102/control/feature-suspend = ""
/local/domain/102/control/feature-s3 = ""
/local/domain/102/control/feature-s4 = ""
/local/domain/102/control/platform-feature-multiprocessor-suspend = "1"
/local/domain/102/control/platform-feature-xs_reset_watches = "1"
/local/domain/102/hvmloader = ""
/local/domain/102/hvmloader/bios = "seabios"
/local/domain/102/hvmloader/allow-memory-relocate = "0"
/local/domain/102/data = ""
/local/domain/102/drivers = ""
/local/domain/102/feature = ""
/local/domain/102/attr = ""
/local/domain/102/domid = "102"
/local/domain/102/store = ""
/local/domain/102/store/port = "1"
/local/domain/102/store/ring-ref = "1044476"
/local/domain/102/platform = ""
/local/domain/102/platform/acpi = "1"
/local/domain/102/platform/acpi_s3 = "0"
/local/domain/102/platform/acpi_s4 = "0"
/local/domain/102/platform/acpi_laptop_slate = "0"
/local/domain/102/console = ""
/local/domain/102/console/backend = "/local/domain/0/backend/console/102/0"
/local/domain/102/console/backend-id = "0"
/local/domain/102/console/limit = "1048576"
/local/domain/102/console/type = "xenconsoled"
/local/domain/102/console/output = "pty"
/local/domain/102/console/tty = "/dev/pts/45"
/local/domain/102/console/port = "2"
/local/domain/102/console/ring-ref = "1044479"
/local/domain/102/image = ""
/local/domain/102/image/device-model-pid = "23647"
/libxl/102/device = ""
/libxl/102/device/vbd = ""
/libxl/102/device/vbd/51712 = ""
/libxl/102/device/vbd/51712/frontend = "/local/domain/102/device/vbd/51712"
/libxl/102/device/vbd/51712/backend = "/local/domain/0/backend/vbd/102/51712"
/libxl/102/device/vbd/51712/params = "/dev/vg_xen/xen_<vm-name>_c"
/libxl/102/device/vbd/51712/script = "/etc/xen/scripts/block"
/libxl/102/device/vbd/51712/frontend-id = "102"
/libxl/102/device/vbd/51712/online = "1"
/libxl/102/device/vbd/51712/removable = "0"
/libxl/102/device/vbd/51712/bootable = "1"
/libxl/102/device/vbd/51712/state = "1"
/libxl/102/device/vbd/51712/dev = "xvda"
/libxl/102/device/vbd/51712/type = "phy"
/libxl/102/device/vbd/51712/mode = "w"
/libxl/102/device/vbd/51712/device-type = "disk"
/libxl/102/device/vbd/51712/discard-enable = "1"
/libxl/102/device/vbd/51728 = ""
/libxl/102/device/vbd/51728/frontend = "/local/domain/102/device/vbd/51728"
/libxl/102/device/vbd/51728/backend = "/local/domain/0/backend/vbd/102/51728"
/libxl/102/device/vbd/51728/params = "/scratch01/gigo.d1/test.xen/<vm-name>.d"
/libxl/102/device/vbd/51728/script = "/etc/xen/scripts/block"
/libxl/102/device/vbd/51728/frontend-id = "102"
/libxl/102/device/vbd/51728/online = "1"
/libxl/102/device/vbd/51728/removable = "0"
/libxl/102/device/vbd/51728/bootable = "1"
/libxl/102/device/vbd/51728/state = "1"
/libxl/102/device/vbd/51728/dev = "xvdb"
/libxl/102/device/vbd/51728/type = "phy"
/libxl/102/device/vbd/51728/mode = "w"
/libxl/102/device/vbd/51728/device-type = "disk"
/libxl/102/device/vbd/51728/discard-enable = "1"
/libxl/102/device/console = ""
/libxl/102/device/console/0 = ""
/libxl/102/device/console/0/frontend = "/local/domain/102/console"
/libxl/102/device/console/0/backend = "/local/domain/0/backend/console/102/0"
/libxl/102/device/console/0/frontend-id = "102"
/libxl/102/device/console/0/online = "1"
/libxl/102/device/console/0/state = "1"
/libxl/102/device/console/0/protocol = "vt100"
/libxl/102/device/vkbd = ""
/libxl/102/device/vkbd/0 = ""
/libxl/102/device/vkbd/0/frontend = "/local/domain/102/device/vkbd/0"
/libxl/102/device/vkbd/0/backend = "/local/domain/0/backend/vkbd/102/0"
/libxl/102/device/vkbd/0/frontend-id = "102"
/libxl/102/device/vkbd/0/online = "1"
/libxl/102/device/vkbd/0/state = "1"
/libxl/102/dm-version = "qemu_xen"
xl block-attach <vm-name> /tmp/gigo.iso,raw,hdd


+ xl block-attach <vm-name> /tmp/gigo.iso,raw,hdd
xl block-list <vm-name>


+ xl block-list <vm-name>
Vdev  BE  handle state evt-ch ring-ref BE-path
51712 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51712
51728 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51728
5696  0   102    1     -1     -1       /local/domain/0/backend/vbd/102/5696
xenstore-ls -f | grep '/102/' | grep '/5696'


+ grep /5696
+ xenstore-ls -f
+ grep /102/
/local/domain/0/backend/vbd/102/5696 = ""
/local/domain/0/backend/vbd/102/5696/frontend = 
"/local/domain/102/device/vbd/5696"
/local/domain/0/backend/vbd/102/5696/params = "/tmp/gigo.iso"
/local/domain/0/backend/vbd/102/5696/script = "/etc/xen/scripts/block"
/local/domain/0/backend/vbd/102/5696/frontend-id = "102"
/local/domain/0/backend/vbd/102/5696/online = "1"
/local/domain/0/backend/vbd/102/5696/removable = "0"
/local/domain/0/backend/vbd/102/5696/bootable = "1"
/local/domain/0/backend/vbd/102/5696/state = "2"
/local/domain/0/backend/vbd/102/5696/dev = "hdd"
/local/domain/0/backend/vbd/102/5696/type = "phy"
/local/domain/0/backend/vbd/102/5696/mode = "w"
/local/domain/0/backend/vbd/102/5696/device-type = "disk"
/local/domain/0/backend/vbd/102/5696/discard-enable = "1"
/local/domain/0/backend/vbd/102/5696/max-ring-page-order = "4"
/local/domain/0/backend/vbd/102/5696/node = "/dev/loop2"
/local/domain/0/backend/vbd/102/5696/physical-device = "7:2"
/local/domain/0/backend/vbd/102/5696/physical-device-path = "/dev/loop2"
/local/domain/0/backend/vbd/102/5696/hotplug-status = "connected"
/local/domain/102/device/vbd/5696 = ""
/local/domain/102/device/vbd/5696/backend = 
"/local/domain/0/backend/vbd/102/5696"
/local/domain/102/device/vbd/5696/backend-id = "0"
/local/domain/102/device/vbd/5696/state = "1"
/local/domain/102/device/vbd/5696/virtual-device = "5696"
/local/domain/102/device/vbd/5696/device-type = "disk"
/libxl/102/device/vbd/5696 = ""
/libxl/102/device/vbd/5696/frontend = "/local/domain/102/device/vbd/5696"
/libxl/102/device/vbd/5696/backend = "/local/domain/0/backend/vbd/102/5696"
/libxl/102/device/vbd/5696/params = "/tmp/gigo.iso"
/libxl/102/device/vbd/5696/script = "/etc/xen/scripts/block"
/libxl/102/device/vbd/5696/frontend-id = "102"
/libxl/102/device/vbd/5696/online = "1"
/libxl/102/device/vbd/5696/removable = "0"
/libxl/102/device/vbd/5696/bootable = "1"
/libxl/102/device/vbd/5696/state = "1"
/libxl/102/device/vbd/5696/dev = "hdd"
/libxl/102/device/vbd/5696/type = "phy"
/libxl/102/device/vbd/5696/mode = "w"
/libxl/102/device/vbd/5696/device-type = "disk"
/libxl/102/device/vbd/5696/discard-enable = "1"
xl block-detach <vm-name> hdd


+ xl block-detach <vm-name> hdd
xl block-list <vm-name>


+ xl block-list <vm-name>
Vdev  BE  handle state evt-ch ring-ref BE-path
51712 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51712
51728 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51728
xenstore-ls -f | grep '/102/' | grep '/5696'


+ grep /5696
+ xenstore-ls -f
+ grep /102/
xl block-attach <vm-name> /tmp/gigo.iso,raw,hdd,ro,cdrom


+ xl block-attach <vm-name> /tmp/gigo.iso,raw,hdd,ro,cdrom
xl block-list <vm-name>


+ xl block-list <vm-name>
Vdev  BE  handle state evt-ch ring-ref BE-path
51712 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51712
51728 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51728
5696  0   102    1     -1     -1       /local/domain/0/backend/qdisk/102/5696
xenstore-ls -f | grep '/102/' | grep '/5696'


+ xenstore-ls -f
+ grep /5696
+ grep /102/
/local/domain/0/backend/qdisk/102/5696 = ""
/local/domain/0/backend/qdisk/102/5696/frontend = 
"/local/domain/102/device/vbd/5696"
/local/domain/0/backend/qdisk/102/5696/params = "aio:/tmp/gigo.iso"
/local/domain/0/backend/qdisk/102/5696/frontend-id = "102"
/local/domain/0/backend/qdisk/102/5696/online = "1"
/local/domain/0/backend/qdisk/102/5696/removable = "1"
/local/domain/0/backend/qdisk/102/5696/bootable = "1"
/local/domain/0/backend/qdisk/102/5696/state = "2"
/local/domain/0/backend/qdisk/102/5696/dev = "hdd"
/local/domain/0/backend/qdisk/102/5696/type = "qdisk"
/local/domain/0/backend/qdisk/102/5696/mode = "r"
/local/domain/0/backend/qdisk/102/5696/device-type = "cdrom"
/local/domain/0/backend/qdisk/102/5696/discard-enable = "0"
/local/domain/0/backend/qdisk/102/5696/feature-flush-cache = "1"
/local/domain/0/backend/qdisk/102/5696/feature-persistent = "1"
/local/domain/0/backend/qdisk/102/5696/info = "5"
/local/domain/0/backend/qdisk/102/5696/hotplug-status = "connected"
/local/domain/102/device/vbd/5696 = ""
/local/domain/102/device/vbd/5696/backend = 
"/local/domain/0/backend/qdisk/102/5696"
/local/domain/102/device/vbd/5696/backend-id = "0"
/local/domain/102/device/vbd/5696/state = "1"
/local/domain/102/device/vbd/5696/virtual-device = "5696"
/local/domain/102/device/vbd/5696/device-type = "cdrom"
/libxl/102/device/vbd/5696 = ""
/libxl/102/device/vbd/5696/frontend = "/local/domain/102/device/vbd/5696"
/libxl/102/device/vbd/5696/backend = "/local/domain/0/backend/qdisk/102/5696"
/libxl/102/device/vbd/5696/params = "aio:/tmp/gigo.iso"
/libxl/102/device/vbd/5696/frontend-id = "102"
/libxl/102/device/vbd/5696/online = "1"
/libxl/102/device/vbd/5696/removable = "1"
/libxl/102/device/vbd/5696/bootable = "1"
/libxl/102/device/vbd/5696/state = "1"
/libxl/102/device/vbd/5696/dev = "hdd"
/libxl/102/device/vbd/5696/type = "qdisk"
/libxl/102/device/vbd/5696/mode = "r"
/libxl/102/device/vbd/5696/device-type = "cdrom"
/libxl/102/device/vbd/5696/discard-enable = "0"
xl block-detach <vm-name> hdd


+ xl block-detach <vm-name> hdd
libxl: error: libxl_device.c:1075:device_backend_callback: Domain 102:unable to 
remove device with path /local/domain/0/backend/qdisk/102/5696
libxl: error: libxl_device.c:1375:device_addrm_aocomplete: Domain 102:Unable to 
remove vbd with id 5696
libxl_device_disk_remove failed.
xl block-list <vm-name>


+ xl block-list <vm-name>
Vdev  BE  handle state evt-ch ring-ref BE-path
51712 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51712
51728 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51728
xenstore-ls -f | grep '/102/' | grep '/5696'


+ xenstore-ls -f
+ grep /5696
+ grep /102/
xl block-attach <vm-name> /tmp/gigo.iso,raw,xvdd,ro,cdrom


+ xl block-attach <vm-name> /tmp/gigo.iso,raw,xvdd,ro,cdrom
xl block-list <vm-name>


+ xl block-list <vm-name>
Vdev  BE  handle state evt-ch ring-ref BE-path
51712 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51712
51728 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51728
51760 0   102    1     -1     -1       /local/domain/0/backend/qdisk/102/51760
xenstore-ls -f | grep '/102/' | grep '/51760'


+ grep /51760
+ xenstore-ls -f
+ grep /102/
/local/domain/0/backend/qdisk/102/51760 = ""
/local/domain/0/backend/qdisk/102/51760/frontend = 
"/local/domain/102/device/vbd/51760"
/local/domain/0/backend/qdisk/102/51760/params = "aio:/tmp/gigo.iso"
/local/domain/0/backend/qdisk/102/51760/frontend-id = "102"
/local/domain/0/backend/qdisk/102/51760/online = "1"
/local/domain/0/backend/qdisk/102/51760/removable = "1"
/local/domain/0/backend/qdisk/102/51760/bootable = "1"
/local/domain/0/backend/qdisk/102/51760/state = "2"
/local/domain/0/backend/qdisk/102/51760/dev = "xvdd"
/local/domain/0/backend/qdisk/102/51760/type = "qdisk"
/local/domain/0/backend/qdisk/102/51760/mode = "r"
/local/domain/0/backend/qdisk/102/51760/device-type = "cdrom"
/local/domain/0/backend/qdisk/102/51760/discard-enable = "0"
/local/domain/0/backend/qdisk/102/51760/feature-flush-cache = "1"
/local/domain/0/backend/qdisk/102/51760/feature-persistent = "1"
/local/domain/0/backend/qdisk/102/51760/info = "5"
/local/domain/0/backend/qdisk/102/51760/hotplug-status = "connected"
/local/domain/102/device/vbd/51760 = ""
/local/domain/102/device/vbd/51760/backend = 
"/local/domain/0/backend/qdisk/102/51760"
/local/domain/102/device/vbd/51760/backend-id = "0"
/local/domain/102/device/vbd/51760/state = "1"
/local/domain/102/device/vbd/51760/virtual-device = "51760"
/local/domain/102/device/vbd/51760/device-type = "cdrom"
/libxl/102/device/vbd/51760 = ""
/libxl/102/device/vbd/51760/frontend = "/local/domain/102/device/vbd/51760"
/libxl/102/device/vbd/51760/backend = "/local/domain/0/backend/qdisk/102/51760"
/libxl/102/device/vbd/51760/params = "aio:/tmp/gigo.iso"
/libxl/102/device/vbd/51760/frontend-id = "102"
/libxl/102/device/vbd/51760/online = "1"
/libxl/102/device/vbd/51760/removable = "1"
/libxl/102/device/vbd/51760/bootable = "1"
/libxl/102/device/vbd/51760/state = "1"
/libxl/102/device/vbd/51760/dev = "xvdd"
/libxl/102/device/vbd/51760/type = "qdisk"
/libxl/102/device/vbd/51760/mode = "r"
/libxl/102/device/vbd/51760/device-type = "cdrom"
/libxl/102/device/vbd/51760/discard-enable = "0"
xl block-detach <vm-name> xvdd


+ xl block-detach <vm-name> xvdd
libxl: error: libxl_device.c:1075:device_backend_callback: Domain 102:unable to 
remove device with path /local/domain/0/backend/qdisk/102/51760
libxl: error: libxl_device.c:1375:device_addrm_aocomplete: Domain 102:Unable to 
remove vbd with id 51760
libxl_device_disk_remove failed.
xl block-list <vm-name>


+ xl block-list <vm-name>
Vdev  BE  handle state evt-ch ring-ref BE-path
51712 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51712
51728 0   102    1     -1     -1       /local/domain/0/backend/vbd/102/51728
xenstore-ls -f | grep '/102/' | grep '/51760'

+ xenstore-ls -f
+ grep /51760
+ grep /102/
xanadu(root) 2 $

Script done on Sun 22 Oct 2017 11:02:58 AM EDT

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