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Could not obtain handle on privileged command interface

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Could not obtain handle on privileged command interface

mailing@securitylabs.it
Hello,

when I try to start xend I receive this error:

root@xenized:~# xend start
ERROR Internal error: Could not obtain handle on privileged command
interface (2 = No such file or directory)
Traceback (most recent call last):
   File "/usr/sbin/xend", line 36, in <module>
     from xen.xend.server import SrvDaemon
   File "usr/lib/python2.5/site-packages/xen/xend/server/SrvDaemon.py",
line 26, in <module>
   File "usr/lib/python2.5/site-packages/xen/xend/server/relocate.py",
line 28, in <module>
   File "usr/lib/python2.5/site-packages/xen/xend/XendDomain.py", line
35, in <module>
   File "usr/lib/python2.5/site-packages/xen/xend/XendCheckpoint.py",
line 20, in <module>
   File "usr/lib/python2.5/site-packages/xen/xend/image.py", line 46, in
<module>
xen.lowlevel.xc.Error: (1, 'Internal error', 'Could not obtain handle on
privileged command interface (2 = No such file or directory)')

Googling seems that I've not booted with the Xen kernel, but It's not my
case:

uname -a

Linux xenized 2.6.31.12-custom #1 SMP Mon Mar 15 15:00:37 CET 2010
x86_64 GNU/Linux

dmesg  | grep -i xen
[    0.000000] Linux version 2.6.31.12-custom (root@xenized) (gcc
version 4.4.3 20100108 (prerelease) (Debian 4.4.2-9) ) #1 SMP Mon Mar 15
15:00:37 CET 2010
[    0.000000] xen_release_chunk: looking at area pfn 9d-a0
[    0.000000] xen_release_chunk: looking at area pfn c0000-e0000
[    0.000000] xen_release_chunk: looking at area pfn f0000-fe000
[    0.000000]  Xen: 0000000000000000 - 000000000009d000 (usable)
[    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)
[    0.000000]  Xen: 0000000000100000 - 00000000bf699000 (usable)
[    0.000000]  Xen: 00000000bf699000 - 00000000bf6af000 (reserved)
[    0.000000]  Xen: 00000000bf6af000 - 00000000bf6ce000 (ACPI data)
[    0.000000]  Xen: 00000000bf6ce000 - 00000000c0000000 (reserved)
[    0.000000]  Xen: 00000000e0000000 - 00000000f0000000 (reserved)
[    0.000000]  Xen: 00000000fe000000 - 0000000100000000 (reserved)
[    0.000000]   #1 [0001fea000 - 0001fff000]   XEN PAGETABLES ==>
[0001fea000 - 0001fff000]
[    0.000000]   #4 [000184b000 - 0001fea000]   XEN START INFO ==>
[000184b000 - 0001fea000]
[    0.124571] Xen: using vcpu_info placement
[    0.124967] PCI-DMA: Using Xen software bounce buffering for IO
(Xen-SWIOTLB)
[    0.131397] xen_swiotlb_fixup: buf=ffff880004e17000 size=67108864
[    0.146553] xen_swiotlb_fixup: buf=ffff880008e77000 size=32768
[    0.146621] Placing 64MB Xen software IO TLB between ffff880004e17000
- ffff880008e17000
[    0.146623] Xen software IO TLB at phys 0x4e17000 - 0x8e17000
[    0.158797] xen: registering gsi 0 triggering 1 polarity 0
[    0.158804] xen: --> irq=0
[    0.158806] xen_set_ioapic_routing: irq 0 gsi 0 vector 240 ioapic 0
pin 0 triggering 0 polarity 0
[    0.158818] xen: registering gsi 1 triggering 1 polarity 0
[    0.158821] xen: --> irq=1
[    0.158823] xen_set_ioapic_routing: irq 1 gsi 1 vector 32 ioapic 0
pin 1 triggering 0 polarity 0
[    0.158828] xen: registering gsi 3 triggering 1 polarity 0
[    0.158831] xen: --> irq=3
[    0.158833] xen_set_ioapic_routing: irq 3 gsi 3 vector 40 ioapic 0
pin 3 triggering 0 polarity 0
[    0.158838] xen: registering gsi 4 triggering 1 polarity 0
[    0.158841] xen: --> irq=4
[    0.158843] xen_set_ioapic_routing: irq 4 gsi 4 vector 48 ioapic 0
pin 4 triggering 0 polarity 0
[    0.158848] xen: registering gsi 5 triggering 1 polarity 0
[    0.158851] xen: --> irq=5
[    0.158853] xen_set_ioapic_routing: irq 5 gsi 5 vector 56 ioapic 0
pin 5 triggering 0 polarity 0
[    0.158857] xen: registering gsi 6 triggering 1 polarity 0
[    0.158860] xen: --> irq=6
[    0.158862] xen_set_ioapic_routing: irq 6 gsi 6 vector 64 ioapic 0
pin 6 triggering 0 polarity 0
[    0.158867] xen: registering gsi 7 triggering 1 polarity 0
[    0.158870] xen: --> irq=7
[    0.158872] xen_set_ioapic_routing: irq 7 gsi 7 vector 72 ioapic 0
pin 7 triggering 0 polarity 0
[    0.158877] xen: registering gsi 8 triggering 1 polarity 0
[    0.158880] xen: --> irq=8
[    0.158882] xen_set_ioapic_routing: irq 8 gsi 8 vector 80 ioapic 0
pin 8 triggering 0 polarity 0
[    0.158886] xen: registering gsi 9 triggering 0 polarity 0
[    0.158889] xen: --> irq=9
[    0.158891] xen_set_ioapic_routing: irq 9 gsi 9 vector 88 ioapic 0
pin 9 triggering 1 polarity 0
[    0.158896] xen: registering gsi 10 triggering 1 polarity 0
[    0.158899] xen: --> irq=10
[    0.158901] xen_set_ioapic_routing: irq 10 gsi 10 vector 96 ioapic 0
pin 10 triggering 0 polarity 0
[    0.158906] xen: registering gsi 11 triggering 1 polarity 0
[    0.158909] xen: --> irq=11
[    0.158911] xen_set_ioapic_routing: irq 11 gsi 11 vector 104 ioapic 0
pin 11 triggering 0 polarity 0
[    0.158915] xen: registering gsi 12 triggering 1 polarity 0
[    0.158918] xen: --> irq=12
[    0.158921] xen_set_ioapic_routing: irq 12 gsi 12 vector 112 ioapic 0
pin 12 triggering 0 polarity 0
[    0.158925] xen: registering gsi 13 triggering 1 polarity 0
[    0.158928] xen: --> irq=13
[    0.158930] xen_set_ioapic_routing: irq 13 gsi 13 vector 120 ioapic 0
pin 13 triggering 0 polarity 0
[    0.158935] xen: registering gsi 14 triggering 1 polarity 0
[    0.158938] xen: --> irq=14
[    0.158940] xen_set_ioapic_routing: irq 14 gsi 14 vector 136 ioapic 0
pin 14 triggering 0 polarity 0
[    0.158945] xen: registering gsi 15 triggering 1 polarity 0
[    0.158948] xen: --> irq=15
[    0.158950] xen_set_ioapic_routing: irq 15 gsi 15 vector 144 ioapic 0
pin 15 triggering 0 polarity 0
[    0.172927] Xen: using vcpuop timer interface
[    0.172927] installing Xen timer for CPU 0
[    0.172997] xen: vcpu_time_info placement not supported
[    0.218319] installing Xen timer for CPU 1
[    0.248551] installing Xen timer for CPU 2
[    0.249239] installing Xen timer for CPU 3
[    0.250784] Booting paravirtualized kernel on Xen
[    0.250840] Xen version: 3.4.2 (preserve-AD) (dom0)
[    0.269000] xenbus_probe_init ok
[    0.334534] xenbus_probe_backend_init bus registered ok
[    0.334620] xenbus_probe_frontend_init bus registered ok
[    0.334677] xen_balloon: Initialising balloon driver with page order 0.
[    0.890440] xen: registering gsi 13 triggering 1 polarity 0
[    0.890443] xen_allocate_pirq: returning irq 13 for gsi 13
[    0.890500] xen: --> irq=13
[    0.890503] xen_set_ioapic_routing: irq 13 gsi 13 vector 120 ioapic 0
pin 13 triggering 0 polarity 0
[    0.890821] xen: registering gsi 8 triggering 1 polarity 0
[    0.890824] xen_allocate_pirq: returning irq 8 for gsi 8
[    0.890880] xen: --> irq=8
[    0.890882] xen_set_ioapic_routing: irq 8 gsi 8 vector 80 ioapic 0
pin 8 triggering 0 polarity 0
[    0.891352] xen: registering gsi 4 triggering 1 polarity 0
[    0.891354] xen_allocate_pirq: returning irq 4 for gsi 4
[    0.891410] xen: --> irq=4
[    0.891413] xen_set_ioapic_routing: irq 4 gsi 4 vector 48 ioapic 0
pin 4 triggering 0 polarity 0
[    0.891940] xen: registering gsi 3 triggering 1 polarity 0
[    0.891942] xen_allocate_pirq: returning irq 3 for gsi 3
[    0.891998] xen: --> irq=3
[    0.892000] xen_set_ioapic_routing: irq 3 gsi 3 vector 40 ioapic 0
pin 3 triggering 0 polarity 0
[    0.901840] xen: registering gsi 16 triggering 0 polarity 1
[    0.901855] xen: --> irq=16
[    0.901858] xen_set_ioapic_routing: irq 16 gsi 16 vector 184 ioapic 0
pin 16 triggering 1 polarity 1
[    0.954879] xen: registering gsi 20 triggering 0 polarity 1
[    0.954889] xen: --> irq=20
[    0.954892] xen_set_ioapic_routing: irq 20 gsi 20 vector 208 ioapic 0
pin 20 triggering 1 polarity 1
[    2.943976] xen: registering gsi 22 triggering 0 polarity 1
[    2.944008] xen: --> irq=22
[    2.944014] xen_set_ioapic_routing: irq 22 gsi 22 vector 33 ioapic 0
pin 22 triggering 1 polarity 1
[    2.963011] xen: registering gsi 16 triggering 0 polarity 1
[    2.963016] xen_allocate_pirq: returning irq 16 for gsi 16
[    2.963107] xen: --> irq=16
[    2.963113] xen_set_ioapic_routing: irq 16 gsi 16 vector 184 ioapic 0
pin 16 triggering 1 polarity 1
[    2.970498] xen: registering gsi 22 triggering 0 polarity 1
[    2.970504] xen_allocate_pirq: returning irq 22 for gsi 22
[    2.970578] xen: --> irq=22
[    2.970583] xen_set_ioapic_routing: irq 22 gsi 22 vector 33 ioapic 0
pin 22 triggering 1 polarity 1
[    3.070823] xen: registering gsi 17 triggering 0 polarity 1
[    3.070843] xen: --> irq=17
[    3.070848] xen_set_ioapic_routing: irq 17 gsi 17 vector 41 ioapic 0
pin 17 triggering 1 polarity 1

root@xenized:~# ls -l /sys/hypervisor/
total 0
drwxr-xr-x 2 root root    0 2010-03-15 15:26 compilation
drwxr-xr-x 2 root root    0 2010-03-15 15:26 properties
-r--r--r-- 1 root root 4096 2010-03-15 15:26 type
-r--r--r-- 1 root root 4096 2010-03-15 15:26 uuid
drwxr-xr-x 2 root root    0 2010-03-15 15:26 version



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Re: [SOLVED] Could not obtain handle on privileged command interface

mailing@securitylabs.it
On 15/03/2010 15:37, [hidden email] wrote:

> Hello,
>
> when I try to start xend I receive this error:
>
> root@xenized:~# xend start
> ERROR Internal error: Could not obtain handle on privileged command
> interface (2 = No such file or directory)
> Traceback (most recent call last):
>   File "/usr/sbin/xend", line 36, in <module>
>     from xen.xend.server import SrvDaemon
>   File "usr/lib/python2.5/site-packages/xen/xend/server/SrvDaemon.py",
> line 26, in <module>
>   File "usr/lib/python2.5/site-packages/xen/xend/server/relocate.py",
> line 28, in <module>
>   File "usr/lib/python2.5/site-packages/xen/xend/XendDomain.py", line
> 35, in <module>
>   File "usr/lib/python2.5/site-packages/xen/xend/XendCheckpoint.py",
> line 20, in <module>
>   File "usr/lib/python2.5/site-packages/xen/xend/image.py", line 46,
> in <module>
> xen.lowlevel.xc.Error: (1, 'Internal error', 'Could not obtain handle
> on privileged command interface (2 = No such file or directory)')
>
> Googling seems that I've not booted with the Xen kernel, but It's not
> my case:
>

Solved by adding:

none /proc/xen xenfs defaults 0 0

in /etc/fstab

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