在 debian 8.8 jessie 上运行 kvm。我无法将 usb 从主机重定向到客户机（尝试使用 debian jessie 和 windows 2012 作为客户机，问题相同）
libvirt 1.2.9-9+deb8u4
如果我从 virt-manager GUI 重定向 USB 驱动器，则客户机将看到 USB。
如果我尝试使用“virsh connect-device guest-dom”hostdev.xml 进行重定向。客户机可以看到该设备（lsusb 和 windows dev manager），但未检测到块设备（lsblk 看不到该设备）
# cat hostdev.xml
<hostdev mode='subsystem' type='usb'>
<source>
<vendor id='0x1976'/>
<product id='0x6025'/>
</source>
</hostdev>
以下是客户端运行时的日志（vir-manager 方法）
May 28 17:18:21 deb2 kernel: [ 949.120071] usb 4-1: new full-speed USB device number 17 using uhci_hcd
May 28 17:18:21 deb2 kernel: [ 949.312416] usb 4-1: New USB device found, idVendor=1976, idProduct=6025
May 28 17:18:21 deb2 kernel: [ 949.312421] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
May 28 17:18:21 deb2 kernel: [ 949.312423] usb 4-1: Product: USB
May 28 17:18:21 deb2 kernel: [ 949.312426] usb 4-1: Manufacturer: ChipsBnk
May 28 17:18:21 deb2 kernel: [ 949.312428] usb 4-1: SerialNumber: 088615381351
May 28 17:18:21 deb2 kernel: [ 949.315619] usb-storage 4-1:1.0: USB Mass Storage device detected
May 28 17:18:21 deb2 kernel: [ 949.315761] scsi16 : usb-storage 4-1:1.0
May 28 17:18:21 deb2 mtp-probe: checking bus 4, device 17: "/sys/devices/pci0000:00/0000:00:05.2/usb4/4-1"
May 28 17:18:21 deb2 mtp-probe: bus: 4, device: 17 was not an MTP device
May 28 17:18:22 deb2 kernel: [ 950.320265] scsi 16:0:0:0: Direct-Access ChipsBnk USB 4.00 PQ: 0 ANSI: 2
May 28 17:18:22 deb2 kernel: [ 950.321321] sd 16:0:0:0: Attached scsi generic sg1 type 0
May 28 17:18:22 deb2 kernel: [ 950.331807] sd 16:0:0:0: [sda] 258047 512-byte logical blocks: (132 MB/125 MiB)
May 28 17:18:22 deb2 kernel: [ 950.338099] sd 16:0:0:0: [sda] Write Protect is off
May 28 17:18:22 deb2 kernel: [ 950.338112] sd 16:0:0:0: [sda] Mode Sense: 00 00 00 00
May 28 17:18:22 deb2 kernel: [ 950.344426] sd 16:0:0:0: [sda] Asking for cache data failed
May 28 17:18:22 deb2 kernel: [ 950.344885] sd 16:0:0:0: [sda] Assuming drive cache: write through
May 28 17:18:22 deb2 kernel: [ 950.429158] sda: sda1
May 28 17:18:22 deb2 kernel: [ 950.481252] sd 16:0:0:0: [sda] Attached SCSI removable disk
root@deb2:~# lsusb
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 002: ID 0409:55aa NEC Corp. Hub
Bus 004 Device 017: ID 1976:6025 Chipsbrand Microelectronics (HK) Co., Ltd. Flash Drive 512 MB
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
root@deb2:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 1 126M 0 disk
└─sda1 8:1 1 126M 0 part
sr0 11:0 1 1024M 0 rom
vda 254:0 0 40G 0 disk
├─vda1 254:1 0 38.3G 0 part /
├─vda2 254:2 0 1K 0 part
└─vda5 254:5 0 1.7G 0 part [SWAP]
以下是客户端失败时的日志（virsh ... xml 方法）
May 28 17:21:01 deb2 kernel: [ 1109.816098] usb 4-2.5: new full-speed USB device number 18 using uhci_hcd
May 28 17:21:02 deb2 kernel: [ 1110.093544] usb 4-2.5: New USB device found, idVendor=1976, idProduct=6025
May 28 17:21:02 deb2 kernel: [ 1110.093548] usb 4-2.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
May 28 17:21:02 deb2 kernel: [ 1110.093551] usb 4-2.5: Product: USB
May 28 17:21:02 deb2 kernel: [ 1110.093553] usb 4-2.5: Manufacturer: ChipsBnk
May 28 17:21:02 deb2 kernel: [ 1110.093555] usb 4-2.5: SerialNumber: 088615381351
May 28 17:21:02 deb2 kernel: [ 1110.095995] usb-storage 4-2.5:1.0: USB Mass Storage device detected
May 28 17:21:02 deb2 mtp-probe: checking bus 4, device 18: "/sys/devices/pci0000:00/0000:00:05.2/usb4/4-2/4-2.5"
May 28 17:21:02 deb2 kernel: [ 1110.097109] scsi17 : usb-storage 4-2.5:1.0
May 28 17:21:02 deb2 mtp-probe: bus: 4, device: 18 was not an MTP device
^C
root@deb2:~# lsusb
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 018: ID 1976:6025 Chipsbrand Microelectronics (HK) Co., Ltd. Flash Drive 512 MB
Bus 004 Device 002: ID 0409:55aa NEC Corp. Hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
root@deb2:~#
root@deb2:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
vda 254:0 0 40G 0 disk
├─vda1 254:1 0 38.3G 0 part /
├─vda2 254:2 0 1K 0 part
└─vda5 254:5 0 1.7G 0 part [SWAP]
May 28 17:22:47 deb2 kernel: [ 1215.915327] usb 4-2.5: USB disconnect, device number 22
系统日志消息看起来与“mtp-probe”相同。但失败情况在 mtp-probe 处停止，而成功情况则在检测到 USB 棒阻塞设备后继续。
在 Windows 2012 下，操作系统在开发管理器的 USB 部分中看到新的“大容量存储...”条目，但在“磁盘管理”和 Windows 资源管理器中均未看到磁盘。
我怎样才能使“virsh attachment-device ..XML”工作？
我没有安装 apparmor。
答案1
virsh 附加设备- 居住客户机-dom hostdev.xml