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


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3















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.










share|improve this question























  • 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
















3















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.










share|improve this question























  • 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














3












3








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.










share|improve this question














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













share|improve this question











share|improve this question




share|improve this question










asked Apr 25 '18 at 15:17









jksjks

162




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



















  • 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

















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





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










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








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.




























    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























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      2 Answers
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      active

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      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      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








      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.

























        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








        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.























          1












          1








          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








          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.










          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








          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



          share|improve this answer






          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




          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.





          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.






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

























              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




























                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


























                  0












                  0








                  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













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



                  modprobe virtio_pci







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Sep 24 '18 at 5:37









                  John DoeJohn Doe

                  4114




                  4114






























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