[Xen-users] blktap2 not working on xen-4.0-testing?

[Nathan March <nathan@xxxxxxxxxxxxxxxxxxxx>]

 Hi All,

According to http://wiki.xensource.com/xenwiki/XenKernelFeatures, 
Jeremy's kernel should support blktap2 properly but I'm not having any 
luck with it.
I've got CONFIG_XEN_BLKDEV_TAP set in the kernel (tried both built in 
and a module) and dmesg shows it coming up on bootup:
[    0.566220] blktap_device_init: blktap device major 253
[    0.566574] blktap_ring_init: blktap ring major: 251

but in /dev/xen/ I have no blktap device, just these:
crw-rw----  1 root root 10, 61 Jul 22 07:11 evtchn
crw-rw----  1 root root 10, 60 Jul 22 07:11 gntdev

stracing blktapctrl shows it looking for a blktap0 in there:
[pid  6545] open("/dev/xen/blktap0", O_RDWR) = -1 ENOENT (No such file 
or directory)
debug output from blktapctrl:
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:790: 
blktapctrl: v1.0.0
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:792: Found 
driver: [raw image (aio)]
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:792: Found 
driver: [raw image (sync)]
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:792: Found 
driver: [vmware image (vmdk)]
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:792: Found 
driver: [ramdisk image (ram)]
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:792: Found 
driver: [qcow disk (qcow)]
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:792: Found 
driver: [qcow2 disk (qcow2)]
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl_linux.c:86: 
blktap0 open failed
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:859: 
couldn't open blktap interface
Jul 22 15:25:58 xen4.nmsrv.com BLKTAPCTRL[2730]: blktapctrl.c:922: 
Unable to start blktapctrl
Am I missing something obvious here?

Thanks,
Nathan

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users