Re: [libvirt] [SOLVED] virDomainAttachDevice error during disk hotplug

On Fri, Aug 16, 2013 at 8:30 AM, Daniel P. Berrange <berrange(a)redhat.com <mailto:berrange@redhat.com>> wrote: On Fri, Aug 16, 2013 at 06:51:21PM +0530, Deepak C Shetty wrote: > On 08/10/2013 06:20 PM, Deepak C Shetty wrote: > >2013-08-10 11:19:41.772+0000: 1091: debug : > >qemuMonitorIOProcess:345 : QEMU_MONITOR_IO_PROCESS: > >mon=0x7f92f0007830 buf={"return": "could not open disk image > >/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399: Invalid > >argument\r\n", "id": "libvirt-67"}^M > > Any suggestions from anyone on why "Invalid Argument" is being returned ? QEMU's error reporting for disk configs is known to be worse than useless. You can't infer anything useful from "Invalid Argument" I'm afraid. I'm going to go out on a limb here and say its an O_DIRECT error. Reason I'm guessing this is that O_DIRECT is not supported on tmpfs and when you attempt to open() a file with O_DIRECT and its not supported you'll get back -EINVAL from the kernel. Newer systems have /run as tmpfs and /var/run symlinked to /run.

-- Doug Goldstein