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Qemu share folder - 9pnet_virtio: no channels available for device

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3

2

I try to run a qemu virtual machine having a folder shared with host. No matter what I do, I have always the same error: 9pnet_virtio: no channels available for device share.

Host machine is under Linux.

Kernel was compiled with all 9P and virtio options enabled (https://wiki.qemu.org/Documentation/9psetup).

Here's my script to run qemu:

#! /bin/bash



HDA=archlinux.img

HDB=myHome.img

KERNEL=linux/arch/x86/boot/bzImage



if [ -n "${KDB}" ]; then

    KGD_WAIT='kgdbwait'

fi



CMDLINE="root=/dev/sda1 rw vga=792 console=ttyS0 kgdboc=ttyS1 ${KGD_WAIT}"



FLAGS="--enable-kvm -s"

VIRTFS+=" --virtfs local,path=./share/,mount_tag=share,security_model=passthrough,id=share "



exec qemu-system-x86_64 ${FLAGS} 

     -hda "${HDA}" -hdb "${HDB}" 

     ${VIRTFS} 

     -net user -net nic 

     -serial stdio -serial tcp::1234,server,nowait 

     -boot c -m 1G 

     -kernel "${KERNEL}" -append "${CMDLINE}"

When I mount the folder manually (https://www.linux-kvm.org/page/9p_virtio)

mkdir share_folder

mount -t 9p -o trans=virtio,version=9p2000.L share share_folder

The result is the same.

linux virtualization qemu virtio

share|improve this question

asked Apr 25 '18 at 15:17

jksjks

162

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Here is an automated QEMU+ Buildroot setup that uses 9P successfully: github.com/cirosantilli/linux-kernel-module-cheat/tree/…
  
  – Ciro Santilli 新疆改造中心 六四事件 法轮功
  Oct 13 '18 at 9:02
  

  
  
  
  

add a comment | 

3

2

I try to run a qemu virtual machine having a folder shared with host. No matter what I do, I have always the same error: 9pnet_virtio: no channels available for device share.

Host machine is under Linux.

Kernel was compiled with all 9P and virtio options enabled (https://wiki.qemu.org/Documentation/9psetup).

Here's my script to run qemu:

#! /bin/bash



HDA=archlinux.img

HDB=myHome.img

KERNEL=linux/arch/x86/boot/bzImage



if [ -n "${KDB}" ]; then

    KGD_WAIT='kgdbwait'

fi



CMDLINE="root=/dev/sda1 rw vga=792 console=ttyS0 kgdboc=ttyS1 ${KGD_WAIT}"



FLAGS="--enable-kvm -s"

VIRTFS+=" --virtfs local,path=./share/,mount_tag=share,security_model=passthrough,id=share "



exec qemu-system-x86_64 ${FLAGS} 

     -hda "${HDA}" -hdb "${HDB}" 

     ${VIRTFS} 

     -net user -net nic 

     -serial stdio -serial tcp::1234,server,nowait 

     -boot c -m 1G 

     -kernel "${KERNEL}" -append "${CMDLINE}"

When I mount the folder manually (https://www.linux-kvm.org/page/9p_virtio)

mkdir share_folder

mount -t 9p -o trans=virtio,version=9p2000.L share share_folder

The result is the same.

linux virtualization qemu virtio

share|improve this question

asked Apr 25 '18 at 15:17

jksjks

162

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Here is an automated QEMU+ Buildroot setup that uses 9P successfully: github.com/cirosantilli/linux-kernel-module-cheat/tree/…
  
  – Ciro Santilli 新疆改造中心 六四事件 法轮功
  Oct 13 '18 at 9:02
  

  
  
  
  

add a comment | 

I try to run a qemu virtual machine having a folder shared with host. No matter what I do, I have always the same error: 9pnet_virtio: no channels available for device share.

Host machine is under Linux.

Kernel was compiled with all 9P and virtio options enabled (https://wiki.qemu.org/Documentation/9psetup).

Here's my script to run qemu:

#! /bin/bash



HDA=archlinux.img

HDB=myHome.img

KERNEL=linux/arch/x86/boot/bzImage



if [ -n "${KDB}" ]; then

    KGD_WAIT='kgdbwait'

fi



CMDLINE="root=/dev/sda1 rw vga=792 console=ttyS0 kgdboc=ttyS1 ${KGD_WAIT}"



FLAGS="--enable-kvm -s"

VIRTFS+=" --virtfs local,path=./share/,mount_tag=share,security_model=passthrough,id=share "



exec qemu-system-x86_64 ${FLAGS} 

     -hda "${HDA}" -hdb "${HDB}" 

     ${VIRTFS} 

     -net user -net nic 

     -serial stdio -serial tcp::1234,server,nowait 

     -boot c -m 1G 

     -kernel "${KERNEL}" -append "${CMDLINE}"

When I mount the folder manually (https://www.linux-kvm.org/page/9p_virtio)

mkdir share_folder

mount -t 9p -o trans=virtio,version=9p2000.L share share_folder

The result is the same.

linux virtualization qemu virtio

share|improve this question

asked Apr 25 '18 at 15:17

jksjks

162

#! /bin/bash



HDA=archlinux.img

HDB=myHome.img

KERNEL=linux/arch/x86/boot/bzImage



if [ -n "${KDB}" ]; then

    KGD_WAIT='kgdbwait'

fi



CMDLINE="root=/dev/sda1 rw vga=792 console=ttyS0 kgdboc=ttyS1 ${KGD_WAIT}"



FLAGS="--enable-kvm -s"

VIRTFS+=" --virtfs local,path=./share/,mount_tag=share,security_model=passthrough,id=share "



exec qemu-system-x86_64 ${FLAGS} 

     -hda "${HDA}" -hdb "${HDB}" 

     ${VIRTFS} 

     -net user -net nic 

     -serial stdio -serial tcp::1234,server,nowait 

     -boot c -m 1G 

     -kernel "${KERNEL}" -append "${CMDLINE}"

mkdir share_folder

mount -t 9p -o trans=virtio,version=9p2000.L share share_folder

share|improve this question

asked Apr 25 '18 at 15:17

jksjks

162

share|improve this question

asked Apr 25 '18 at 15:17

jksjks

162

asked Apr 25 '18 at 15:17

jksjks

162

asked Apr 25 '18 at 15:17

jksjks

162

2 Answers
2

active

oldest

votes

1

Resolved for me (with an ubuntu 18.04 host and 14.04 guest) by adding theses modules:

• virtio_input


• 9pnet


• 9pnet_virtio

into guest file /etc/initramfs-tools/modules.

Don't forget to upadate initramfs for your kernel(s) after add:

update-initramfs -uk <kernel|all>

share|improve this answer

answered 21 hours ago

BatmanBatman

112

New contributor

Batman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

0

In my case it was failing due to missing virtio_pci module and I fixed it with:

modprobe virtio_pci

share|improve this answer

answered Sep 24 '18 at 5:37

John DoeJohn Doe

4114

add a comment | 

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1

Resolved for me (with an ubuntu 18.04 host and 14.04 guest) by adding theses modules:

• virtio_input


• 9pnet


• 9pnet_virtio

into guest file /etc/initramfs-tools/modules.

Don't forget to upadate initramfs for your kernel(s) after add:

update-initramfs -uk <kernel|all>

share|improve this answer

answered 21 hours ago

BatmanBatman

112

New contributor

Batman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

1

Resolved for me (with an ubuntu 18.04 host and 14.04 guest) by adding theses modules:

• virtio_input


• 9pnet


• 9pnet_virtio

into guest file /etc/initramfs-tools/modules.

Don't forget to upadate initramfs for your kernel(s) after add:

update-initramfs -uk <kernel|all>

share|improve this answer

answered 21 hours ago

BatmanBatman

112

New contributor

Batman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

Resolved for me (with an ubuntu 18.04 host and 14.04 guest) by adding theses modules:

• virtio_input


• 9pnet


• 9pnet_virtio

into guest file /etc/initramfs-tools/modules.

Don't forget to upadate initramfs for your kernel(s) after add:

update-initramfs -uk <kernel|all>

share|improve this answer

answered 21 hours ago

BatmanBatman

112

New contributor

Batman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this answer

answered 21 hours ago

BatmanBatman

112

New contributor

Batman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered 21 hours ago

BatmanBatman

112

New contributor

Batman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered 21 hours ago

BatmanBatman

112

0

In my case it was failing due to missing virtio_pci module and I fixed it with:

modprobe virtio_pci

share|improve this answer

answered Sep 24 '18 at 5:37

John DoeJohn Doe

4114

add a comment | 

0

In my case it was failing due to missing virtio_pci module and I fixed it with:

modprobe virtio_pci

share|improve this answer

answered Sep 24 '18 at 5:37

John DoeJohn Doe

4114

add a comment | 

In my case it was failing due to missing virtio_pci module and I fixed it with:

modprobe virtio_pci

share|improve this answer

answered Sep 24 '18 at 5:37

John DoeJohn Doe

4114

share|improve this answer

answered Sep 24 '18 at 5:37

John DoeJohn Doe

4114

answered Sep 24 '18 at 5:37

John DoeJohn Doe

4114

answered Sep 24 '18 at 5:37

John DoeJohn Doe

4114