文章目錄
1. 查看linux usb設備
1.1.通過/sys/kernel/debug/usb/devices文件
[root@192 usb-test]# cat /sys/kernel/debug/usb/devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 6
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev= 3.10
S: Manufacturer=Linux 3.10.0-693.21.1.el7.x86_64.debug ehci_hcd
S: Product=EHCI Host Controller
S: SerialNumber=0000:02:03.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms
T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 1, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0001 Rev= 3.10
S: Manufacturer=Linux 3.10.0-693.21.1.el7.x86_64.debug uhci_hcd
S: Product=UHCI Host Controller
S: SerialNumber=0000:02:00.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0e0f ProdID=0003 Rev= 1.03
S: Manufacturer=VMware
S: Product=VMware Virtual USB Mouse
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=1ms
T: Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 3 Spd=12 MxCh= 7
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0e0f ProdID=0002 Rev= 1.00
S: Product=VMware Virtual USB Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms
T: Bus=02 Lev=02 Prnt=03 Port=00 Cnt=01 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0e0f ProdID=0008 Rev= 1.00
S: Manufacturer=VMware
S: Product=Virtual Bluetooth Adapter
S: SerialNumber=000650268328
C:* #Ifs= 2 Cfg#= 1 Atr=c0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
T: Bus=02 Lev=02 Prnt=03 Port=01 Cnt=02 Dev#= 6 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1
P: Vendor=0ef5 ProdID=2202 Rev= 1.00
S: Manufacturer=USB Mass Storage
S: Product=USB Mass Storage
S: SerialNumber=2005102616390601
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
1.2. 通過lsusb命令
[root@localhost ~]# lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/7p, 12M
|__ Port 1: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 1: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 2: Dev 5, If 0, Class=Mass Storage, Driver=usb-storage, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
2.啓動帶usb設備的虛擬機
注意，識別出host上usb設備的方式有很多種，以下的並不完整
2.1.根據Bus, Dev來識別
- qemu命令行方式
-device usb-host,hostbus=2,hostaddr=6,id=hostdev0
這種方式優點在於Dev號是唯一的，如1.2節所示，每個層級的設備都是統一編號
- libvirt xml方式
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x0ef5'/>
<product id='0x2202'/>
<address bus='2' device='6' />
</source>
</hostdev>
這裏效果和上面一樣，但是不知道vendor和product的id是否是必須的？？？
2.2. 根據Bus，Port來識別
- qemu命令行方式
-device usb-host,hostbus=2,hostport=2.2,id=hostdev0 \
這裏要注意hostport的2.2，代表是Bus=02，Port2的Port2，或者是level2的Port2？？？
- libvirt xml方式
贊不支持，需要開發
3.動態刪除usb設備
3.1.列出qemu的虛擬usb設備
(qemu) info usb
Device 0.2, Port 1, Speed 12 Mb/s, Product host:1.2, ID: hostdev0
Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
Device 0.4, Port 2.1, Speed 12 Mb/s, Product USB Mass Storage, ID: hostdev1
圖3-1
字段含義
ID: hostdev0這個就是qemu啓動參數裏面的id
Device 0.2指的是guest裏面看到的Dev 2
Port 1指的是Bus 01下面的Port1
Port 2.2指的是Bus 01下面的Port2，再下面的Port1
Product指的是產品名字，沒任何意義
由此可見，真正是對host可見的只有ID，因此要刪除一個設備，只能通過ID號
[root@192 usb-test]# lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/7p, 12M
|__ Port 1: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 1: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 2: Dev 5, If 0, Class=Mass Storage, Driver=usb-storage, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
|__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 480M
從host上U盤信息也可以看到，與圖3-1顯示的信息無關
3.2.刪除指定設備
(qemu) device_del hostdev1
(qemu) info usb
Device 0.2, Port 1, Speed 12 Mb/s, Product host:1.2, ID: hostdev0
Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
可以看到，ID爲hostdev1的設備被刪除了
-libvirt刪除
[root@localhost usb-test]# virsh detach-device vm1-usb --file usb_2.0.xml
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<address bus='1' port='1' />
</source>
</hostdev>
3.3.動態添加設備
[root@localhost usb-test]# virsh attach-device vm1-usb --file usb_2.0.xml
Device attached successfully
[1]USB device & USB controller & USB passthrough
[2]Linux下，查看USB設備信息
[3]KVM usb passthrough配置
[4]虛機支持虛擬USB存儲設備
[5]qemu: usb存儲設備仿真