[Xen-bugs] [Bug 1628] New: xen networking does not work

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1628

           Summary: xen networking does not work
           Product: Xen
           Version: unstable
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: darkbasic4@xxxxxxxxx


I pulled latest version of xen-4.0-testing and both 2.6.32 and 2.6.31 git
kernels.

With kernel 2.6.32 networking is very problematic: the vast majority of times I
get a backtrace and I cannot start another domU.
Anyway, if I can start the domU the networking (bridge) works.

With 2.6.31 I never managed to boot the domU and I get the following backtrace.
I also tried netchannel2 but it does not work too (please see
http://permalink.gmane.org/gmane.comp.emulators.xen.user/59780)

This is the config:
memory = 1000

vif = ['bridge=eth0']

disk =  [
       'tap2:tapdisk:aio:/srv/xen/webserver2.img,hda,w',
#       'file:/root/debian-testing-amd64-businesscard.iso,hdc:cdrom,r',
#       'phy:/dev/cdrom,hdc:cdrom,r',
       ]

#boot = "dc"
#device_model = '/usr/lib/xen/bin/qemu-dm'
#kernel = "/usr/lib/xen/boot/hvmloader"
#builder='hvm'
#sdl=0
#vnc=1
#vnclisten="0.0.0.0"
#vncpasswd=''

kernel = "/usr/lib/xen/boot/pv-grub-x86_64.gz"
extra = "(hd0,0)/boot/grub/menu.lst"




root@dom0-firewall:~# xm create /srv/xen/profiles/prova.cfg -c
Using config file "/srv/xen/profiles/prova.cfg".

Message from syslogd@dom0-firewall at Jun 28 15:04:00 ...
 kernel:[  123.968631] Oops: 0000 [#1] SMP 

Message from syslogd@dom0-firewall at Jun 28 15:04:00 ...
 kernel:[  123.968729] last sysfs file: /sys/devices/vif-2-0/uevent

Message from syslogd@dom0-firewall at Jun 28 15:04:00 ...
 kernel:[  123.971447] Stack:

Message from syslogd@dom0-firewall at Jun 28 15:04:00 ...
 kernel:[  123.972058] Call Trace:

Message from syslogd@dom0-firewall at Jun 28 15:04:00 ...
 kernel:[  123.972734] Code: 1b 66 45 81 55 48 89 f5 53 48 89 fb 48 83 ec 18 65
48 8b 04 25 28 00 00 00 48 89 44 24 08 31 c0 48 8b 87 c8 00 00 00 48 8b 77 08
<4c> 8b 60 08 31 ff e8 30 6c ff ff 49 89 c5 48 3d 00 f0 ff ff 76 

Message from syslogd@dom0-firewall at Jun 28 15:04:00 ...
 kernel:[  123.974651] CR2: 0000000000000008
root@dom0-firewall:~# tail -50 /var/log/messages 
Jun 28 15:02:57 dom0-firewall kernel: [   60.221063] blktap_ring_mmap: blktap:
mapping pid is 1638
Jun 28 15:02:57 dom0-firewall kernel: [   60.221083] blktap_validate_params:
aio:/srv/xen/webserver2.img: capacity: 20971520, sector-size: 512
Jun 28 15:02:57 dom0-firewall kernel: [   60.221088] blktap_validate_params:
aio:/srv/xen/webserver2.img: capacity: 20971520, sector-size: 512
Jun 28 15:02:57 dom0-firewall kernel: [   60.221092] blktap_device_create:
minor 0 sectors 20971520 sector-size 512
Jun 28 15:02:57 dom0-firewall kernel: [   60.221217] blktap_device_create:
creation of 254:0: 0
Jun 28 15:02:57 dom0-firewall kernel: [   60.921488] blkback: ring-ref 2047,
event-channel 4, protocol 1 (x86_64-abi)
Jun 28 15:03:58 dom0-firewall kernel: [  121.314577] blktap_device_destroy:
destroy device 0 users 0
Jun 28 15:03:58 dom0-firewall kernel: [  121.741044] blktap_ring_vm_close:
unmapping ring 0
Jun 28 15:03:58 dom0-firewall kernel: [  121.741056] blktap_ring_release:
freeing device 0
Jun 28 15:04:00 dom0-firewall kernel: [  123.929283]
blktap_control_allocate_tap: allocated tap ffff88016db87800
Jun 28 15:04:00 dom0-firewall kernel: [  123.930148] blktap_ring_open: opening
device blktap0
Jun 28 15:04:00 dom0-firewall kernel: [  123.930153] blktap_ring_open: opened
device 0
Jun 28 15:04:00 dom0-firewall kernel: [  123.930168] blktap_ring_mmap: blktap:
mapping pid is 1779
Jun 28 15:04:00 dom0-firewall kernel: [  123.930184] blktap_validate_params:
aio:/srv/xen/webserver2.img: capacity: 20971520, sector-size: 512
Jun 28 15:04:00 dom0-firewall kernel: [  123.930187] blktap_validate_params:
aio:/srv/xen/webserver2.img: capacity: 20971520, sector-size: 512
Jun 28 15:04:00 dom0-firewall kernel: [  123.930191] blktap_device_create:
minor 0 sectors 20971520 sector-size 512
Jun 28 15:04:00 dom0-firewall kernel: [  123.968504] PGD 16ec35067 PUD
16d88a067 PMD 0 
Jun 28 15:04:00 dom0-firewall kernel: [  123.968779] CPU 0 
Jun 28 15:04:00 dom0-firewall kernel: [  123.968849] Modules linked in: bridge
stp xenfs blktap xen_evtchn loop firewire_sbp2 snd_hda_codec_realtek
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer joydev evdev snd
i2c_i801 i2c_core soundcore snd_page_alloc pcspkr psmouse button serio_raw
shpchp pci_hotplug wmi processor acpi_processor ext4 mbcache jbd2 crc16 usbhid
hid sd_mod crc_t10dif ata_generic ahci firewire_ohci megaraid_sas pata_via tg3
ata_piix firewire_core crc_itu_t libata libphy uhci_hcd ehci_hcd thermal r8169
mii thermal_sys usbcore nls_base scsi_mod [last unloaded: scsi_wait_scan]
Jun 28 15:04:00 dom0-firewall kernel: [  123.970616] Pid: 498, comm: udevd Not
tainted 2.6.31.13 #1 To Be Filled By O.E.M.
Jun 28 15:04:00 dom0-firewall kernel: [  123.970684] RIP:
e030:[<ffffffff8124e230>]  [<ffffffff8124e230>] netback_uevent+0x34/0xd5
Jun 28 15:04:00 dom0-firewall kernel: [  123.970779] RSP: e02b:ffff88016e16fda8
 EFLAGS: 00010246
Jun 28 15:04:00 dom0-firewall kernel: [  123.970829] RAX: 0000000000000000 RBX:
ffff88016d918400 RCX: 0000000000000000
Jun 28 15:04:00 dom0-firewall kernel: [  123.970882] RDX: ffffffff8145661b RSI:
ffff88016d9185c0 RDI: ffff88016d918400
Jun 28 15:04:00 dom0-firewall kernel: [  123.970935] RBP: ffff88016e144000 R08:
0000000000000002 R09: 0000000000000000
Jun 28 15:04:00 dom0-firewall kernel: [  123.970989] R10: 0000000000000401 R11:
00000000000286ec R12: ffff88017203e120
Jun 28 15:04:00 dom0-firewall kernel: [  123.971042] R13: ffff88016d918450 R14:
ffff88012803f000 R15: ffffffff81507550
Jun 28 15:04:00 dom0-firewall kernel: [  123.971097] FS: 
00007f5a46bf77a0(0000) GS:ffffc90000000000(0000) knlGS:0000000000000000
Jun 28 15:04:00 dom0-firewall kernel: [  123.971166] CS:  e033 DS: 0000 ES:
0000 CR0: 000000008005003b
Jun 28 15:04:00 dom0-firewall kernel: [  123.971217] CR2: 0000000000000008 CR3:
000000016e160000 CR4: 0000000000002660
Jun 28 15:04:00 dom0-firewall kernel: [  123.971271] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Jun 28 15:04:00 dom0-firewall kernel: [  123.971325] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Jun 28 15:04:00 dom0-firewall kernel: [  123.971379] Process udevd (pid: 498,
threadinfo ffff88016e16e000, task ffff88016db7a880)
Jun 28 15:04:00 dom0-firewall kernel: [  123.971491]  ffffffff81464f6c
00000000eff20557 00000000000080d0 ffff88016d918440
Jun 28 15:04:00 dom0-firewall kernel: [  123.971623] <0> ffff88016e144000
ffff88017203e120 ffff88016d918450 ffffffff8128694d
Jun 28 15:04:00 dom0-firewall kernel: [  123.971820] <0> ffff88016e16ff50
00000000eff20557 ffff88016d918450 0000000000000000
Jun 28 15:04:00 dom0-firewall kernel: [  123.972105]  [<ffffffff8128694d>] ?
dev_uevent+0xdd/0x134
Jun 28 15:04:00 dom0-firewall kernel: [  123.972157]  [<ffffffff81287983>] ?
show_uevent+0x92/0xff
Jun 28 15:04:00 dom0-firewall kernel: [  123.972208]  [<ffffffff812865a5>] ?
dev_attr_show+0x2e/0x6b
Jun 28 15:04:00 dom0-firewall kernel: [  123.972261]  [<ffffffff810d1460>] ?
get_zeroed_page+0x21/0x76
Jun 28 15:04:00 dom0-firewall kernel: [  123.972316]  [<ffffffff81167217>] ?
sysfs_read_file+0xbb/0x156
Jun 28 15:04:00 dom0-firewall kernel: [  123.972369]  [<ffffffff8100e301>] ?
xen_force_evtchn_callback+0x1d/0x37
Jun 28 15:04:00 dom0-firewall kernel: [  123.972422]  [<ffffffff8100edf2>] ?
check_events+0x12/0x20
Jun 28 15:04:00 dom0-firewall kernel: [  123.972474]  [<ffffffff81108fdc>] ?
vfs_read+0xb1/0x123
Jun 28 15:04:00 dom0-firewall kernel: [  123.972525]  [<ffffffff8100eddf>] ?
xen_restore_fl_direct_end+0x0/0x1
Jun 28 15:04:00 dom0-firewall kernel: [  123.972578]  [<ffffffff81387053>] ?
_spin_unlock_irqrestore+0x24/0x3e
Jun 28 15:04:00 dom0-firewall kernel: [  123.972631]  [<ffffffff81109136>] ?
sys_read+0x55/0x90
Jun 28 15:04:00 dom0-firewall kernel: [  123.972682]  [<ffffffff81013e02>] ?
system_call_fastpath+0x16/0x1b
Jun 28 15:04:00 dom0-firewall kernel: [  123.974604]  RSP <ffff88016e16fda8>
Jun 28 15:04:00 dom0-firewall kernel: [  123.974698] ---[ end trace
c9847565b3c746b5 ]---
root@dom0-firewall:~# Error: Device 0 (vif) could not be connected. Hotplug
scripts not working.


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