ubuntu15.10 kvm给guest分配usb设备不成功

ForCalm

环境如下:
Host: Ubuntu15.10 i386
Guest: RedHat6.3-i686/winXP-32

根据ubuntu官方的介绍检查/etc/apparmor.d/abstractions/libvirt-qemu文件，描述的配置都存在：
/sys/bus/usb/devices/ r,
/sys/devices/*/*/usb[0-9]*/** r,
/dev/bus/usb/*/[0-9]* rw,

/dev/bus/usb/ r,
/etc/udev/udev.conf r,
/sys/bus/ r,
/sys/class/ r,

用virt-manager添加了usb host，但是guest系统始终无法获得此设备：


反而用sudo qemu-system-i386 winxp.img -usb -usbdevide host:14cd:1212 的方法启动guest系统倒是可以识别，刚开始也怀疑是权限的问题，可是查看guest启动之后的设备信息，发现属主和组都已经改变了:

重新修改了rhel6的domain配置，还是不可用，有谁经历过ubuntu上的这种问题知道该怎么弄吗：

1. <domain type='kvm' id='16'>
   
2.   <name>rhel6</name>
   
3.   <uuid>8bcfc45a-38ae-449f-8ba3-8aeef867c693</uuid>
   
4.   <memory unit='KiB'>524288</memory>
   
5.   <currentMemory unit='KiB'>524288</currentMemory>
   
6.   <vcpu placement='static'>2</vcpu>
   
7.   <resource>
   
8.     <partition>/machine</partition>
   
9.   </resource>
   
10.   <os>
    
11.     <type arch='i686' machine='pc-i440fx-vivid'>hvm</type>
    
12.     <boot dev='hd'/>
    
13.   </os>
    
14.   <features>
    
15.     <acpi/>
    
16.     <apic/>
    
17.     <pae/>
    
18.   </features>
    
19.   <cpu mode='custom' match='exact'>
    
20.     <model fallback='allow'>n270</model>
    
21.   </cpu>
    
22.   <clock offset='utc'>
    
23.     <timer name='rtc' tickpolicy='catchup'/>
    
24.     <timer name='pit' tickpolicy='delay'/>
    
25.     <timer name='hpet' present='no'/>
    
26.   </clock>
    
27.   <on_poweroff>destroy</on_poweroff>
    
28.   <on_reboot>restart</on_reboot>
    
29.   <on_crash>restart</on_crash>
    
30.   <pm>
    
31.     <suspend-to-mem enabled='no'/>
    
32.     <suspend-to-disk enabled='no'/>
    
33.   </pm>
    
34.   <devices>
    
35.     <emulator>/usr/bin/kvm-spice</emulator>
    
36.     <disk type='file' device='disk'>
    
37.       <driver name='qemu' type='qcow2'/>
    
38.       <source file='/home/ma/rhel6.img'/>
    
39.       <backingStore/>
    
40.       <target dev='vda' bus='virtio'/>
    
41.       <alias name='virtio-disk0'/>
    
42.       <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    
43.     </disk>
    
44.     <disk type='file' device='cdrom'>
    
45.       <driver name='qemu' type='raw'/>
    
46.       <source file='/home/ma/software/rhel-server-6.3-i386-dvd.iso'/>
    
47.       <backingStore/>
    
48.       <target dev='hda' bus='ide'/>
    
49.       <readonly/>
    
50.       <alias name='ide0-0-0'/>
    
51.       <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    
52.     </disk>
    
53.     <controller type='pci' index='0' model='pci-root'>
    
54.       <alias name='pci.0'/>
    
55.     </controller>
    
56.     <controller type='ide' index='0'>
    
57.       <alias name='ide'/>
    
58.       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    
59.     </controller>
    
60.     <controller type='virtio-serial' index='0'>
    
61.       <alias name='virtio-serial0'/>
    
62.       <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    
63.     </controller>
    
64.     <controller type='usb' index='0' model='ehci'>
    
65.       <alias name='usb'/>
    
66.       <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0' multifunction='on'/>
    
67.     </controller>
    
68.     <interface type='network'>
    
69.       <mac address='52:54:00:4c:de:61'/>
    
70.       <source network='default' bridge='virbr0'/>
    
71.       <target dev='vnet0'/>
    
72.       <model type='virtio'/>
    
73.       <alias name='net0'/>
    
74.       <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    
75.     </interface>
    
76.     <serial type='pty'>
    
77.       <source path='/dev/pts/21'/>
    
78.       <target port='0'/>
    
79.       <alias name='serial0'/>
    
80.     </serial>
    
81.     <console type='pty' tty='/dev/pts/21'>
    
82.       <source path='/dev/pts/21'/>
    
83.       <target type='serial' port='0'/>
    
84.       <alias name='serial0'/>
    
85.     </console>
    
86.     <channel type='spicevmc'>
    
87.       <target type='virtio' name='com.redhat.spice.0' state='disconnected'/>
    
88.       <alias name='channel0'/>
    
89.       <address type='virtio-serial' controller='0' bus='0' port='1'/>
    
90.     </channel>
    
91.     <input type='tablet' bus='usb'>
    
92.       <alias name='input0'/>
    
93.     </input>
    
94.     <input type='mouse' bus='ps2'/>
    
95.     <input type='keyboard' bus='ps2'/>
    
96.     <graphics type='spice' port='5901' autoport='yes' listen='127.0.0.1'>
    
97.       <listen type='address' address='127.0.0.1'/>
    
98.     </graphics>
    
99.     <video>
    
100.       <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1'/>
     
101.       <alias name='video0'/>
     
102.       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     
103.     </video>
     
104.     <hostdev mode='subsystem' type='usb' managed='yes'>
     
105.       <source>
     
106.         <vendor id='0x14cd'/>
     
107.         <product id='0x1212'/>
     
108.         <address bus='2' device='4'/>
     
109.       </source>
     
110.       <alias name='hostdev0'/>
     
111.       <address type='usb' bus='0' port='4'/>
     
112.     </hostdev>
     
113.     <redirdev bus='usb' type='spicevmc'>
     
114.       <alias name='redir0'/>
     
115.     </redirdev>
     
116.     <memballoon model='virtio'>
     
117.       <alias name='balloon0'/>
     
118.       <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
     
119.     </memballoon>
     
120.   </devices>
     
121.   <seclabel type='dynamic' model='apparmor' relabel='yes'>
     
122.     <label>libvirt-8bcfc45a-38ae-449f-8ba3-8aeef867c693</label>
     
123.     <imagelabel>libvirt-8bcfc45a-38ae-449f-8ba3-8aeef867c693</imagelabel>
     
124.   </seclabel>
     
125. </domain>
     

复制代码