[Xen-users] Can not init netfront

[Nodir Kodirov <nodir.qodirov@xxxxxxxxx>]

Hello,Â

I'm a graduate student, trying to run Mini-OS for my project.

When I create mini-os instance, netfront fails to initialize. I get following output from 'xl console <domid>'Â

Xen Minimal OS!

 start_info: 000000000028f000(VA)

  nr_pages: 0x40000

 shared_inf: 0xc05e1000(MA)

  Âpt_base: 0000000000292000(VA)

nr_pt_frames: 0x5

  mfn_list: 000000000008f000(VA)

 Âmod_start: 0x0(VA)

  Âmod_len: 0

   Âflags: 0x0

  cmd_line:Â

 stack:   Â000000000004e7a0-000000000006e7a0

MM: Init

   _text: 0000000000000000(VA)

  Â_etext: 00000000000303c2(VA)

 Â_erodata: 0000000000038000(VA)

  Â_edata: 0000000000038540(VA)

stack start: 000000000004e7a0(VA)

   Â_end: 000000000008efa0(VA)

 start_pfn: 29a

  max_pfn: 40000

Mapping memory range 0x400000 - 0x40000000

setting 0000000000000000-0000000000038000 readonly

skipped 0000000000001000

MM: Initialise page allocator for 498000(498000)-40000000(40000000)

MM: done

Demand map pfns at 40001000-2040001000.

Initialising timer interface

Initialising console ... done.

gnttab_table mapped at 0000000040001000.

Initialising scheduler

Thread "Idle": pointer: 0x4a2070, stack: 0x4b0000

Thread "xenstore": pointer: 0x4a20d0, stack: 0x4c0000

xenbus initialised on irq 1 mfn 0xbe5f5

Thread "shutdown": pointer: 0x4a2130, stack: 0x4d0000

Thread "server": pointer: 0x4a2190, stack: 0x4e0000

[server] Waiting for network.

Failed to read device/vif/0/backend-id.

_init_netfront: backend/mac failed

VM's state is 'b' (for blocked) and that's a last line of output before VM gets frozen. My host environment is x86_64ÂCentOS 6.5 with Linux 3.10.34-11 kernel. I configured a bridged network with eth0 and xenbr0 configured as following:

/etc/sysconfig/network-scripts/ifcfg-xenbr0

DEVICE=xenbr0

TYPE=Bridge

BOOTPROTO=dhcp

>

DELAY=0

NM_CONTROLLED=no

/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"

NM_CONTROLLED="no"

>

HWADDR=00:1C:C0:37:57:B2

BRIDGE=xenbr0

Xen VM configuration file is as follows:

kernel = "/home/knodir/devel/mini-os/mini-os.gz"

builder = 'pvm'

vcpus = 1

memory = 1024

name = "Mini-OS-custom"

serial = 'pty'

>

on_reboot  = 'destroy'

on_crash  Â= 'destroy'

My custom mini-os kernel is built from https://github.com/cnplab/mini-os since I'm planning to use it for ClickOSÂhttps://github.com/cnplab/clickos I believe this modified Mini-OS to have the same networking source code as an original one (I did not apply xennetÂhttps://github.com/cnplab/xennet patch).

I wonder if I'm missing something in my Xen VM configuration file. When I add a new line vif=[ 'mac=00:16:3e:01:01:01,bridge=xenbr0' ] to it, VM is not created at all. These are the VM creation corresponding lines from /var/log/xen/xend.log

[2014-07-01 14:11:11 20157] DEBUG (XendDomainInfo:151) XendDomainInfo.recreate({'max_vcpu_id': 0, 'cpu_time': 0L, 'ssidref': 0, 'hvm': 0, 'shutdown_reason': 255, 'dying': 0, 'online_vcpus': 1, 'domid': 33, 'paused': 1, 'crashed': 0, 'running': 0, 'maxmem_kb': 1049600L, 'shutdown': 0, 'mem_kb': 1048576L, 'handle': [121, 198, 174, 221, 11, 118, 72, 231, 172, 230, 168, 102, 169, 14, 221, 123], 'blocked': 0, 'cpupool': 0})

[2014-07-01 14:11:11 20157] INFO (XendDomainInfo:169) Recreating domain 33, UUID 79c6aedd-0b76-48e7-ace6-a866a90edd7b. at /local/domain/33

[2014-07-01 14:11:11 20157] DEBUG (XendDomain:476) Adding Domain: 33

[2014-07-01 14:11:11 20157] DEBUG (XendDomainInfo:1882) XendDomainInfo.handleShutdownWatch

[2014-07-01 14:11:11 20157] DEBUG (DevController:95) DevController: writing {'state': '1', 'backend-id': '0', 'backend': '/local/domain/0/backend/console/33/0'} to /local/domain/33/device/console/0.

[2014-07-01 14:11:11 20157] DEBUG (DevController:97) DevController: writing {'domain': 'Mini-OS-custom', 'frontend': '/local/domain/33/device/console/0', 'uuid': '12b56995-0349-8bf3-93ee-92c6a9ec75e7', 'frontend-id': '33', 'state': '1', 'location': '2', 'online': '1', 'protocol': 'vt100'} to /local/domain/0/backend/console/33/0.

[2014-07-01 14:11:11 20157] WARNING (XendDomainInfo:2062) Domain has crashed: name=Mini-OS-custom id=33.

[2014-07-01 14:11:11 20157] ERROR (XendDomainInfo:2196) VM Mini-OS-custom restarting too fast (Elapsed time: 0.400618 seconds). Refusing to restart to avoid loops.

[2014-07-01 14:11:11 20157] DEBUG (XendDomainInfo:3077) XendDomainInfo.destroy: domid=33

[2014-07-01 14:11:12 20157] DEBUG (XendDomainInfo:2402) Destroying device model

[2014-07-01 14:11:12 20157] DEBUG (XendDomainInfo:2409) Releasing devices

[2014-07-01 14:11:12 20157] DEBUG (XendDomainInfo:2407) No device model

[2014-07-01 14:11:12 20157] DEBUG (XendDomainInfo:2409) Releasing devices

Any help is appreciated.

Nodir.

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