On Tue, May 21, 2019 at 1:39 PM Ryota Ozaki <ozak...@netbsd.org> wrote: > > Hi, > > The following two patches enables a NetBSD guest running > on a Linux KVM to share files with its host over virtio-9p. > > https://www.netbsd.org/~ozaki-r/vio9p.diff > https://www.netbsd.org/~ozaki-r/mount_9p-cdev.diff > > The first patch exports a 9p endpoint of virtio-9p via a character > device (e.g., /dev/vio9p0) and the second one extends mount_9p > (puffs) to talk with a 9p server inside qemu via the character device. > > [Usage] > > Export a directory of a host via virtio-9p. The below XML is part of > a libvirt domain configuration. It exports "/var/lib/libvirt/export" > directory with a tag "test". If it is the first entry, it will have > minor number 0 and /dev/vio9p0 is assigned to it typically. > > <filesystem type='mount' accessmode='mapped'> > <source dir='/var/lib/libvirt/export'/> > <target dir='test'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > </filesystem> > > A boot log of vio9p looks like this: > > virtio0 at pci0 dev 3 function 0 > virtio0: Virtio 9P Transport Device (rev. 0x00) > vio9p0 at virtio0: Features: 0x10000000<INDIRECT_DESC> > virtio0: allocated 12288 byte for virtqueue 0 for vio9p, size 128 > virtio0: using 4096 byte (256 entries) indirect descriptors > vio9p0: tagged as test > virtio0: interrupting at ioapic0 pin 11 > > A NetBSD guest can mount the exported directory with mount_9p. > > mount_9p -cu /dev/vio9p0 /mnt/9p > > -c tells mount_9p to interpret the first argument as a character > device file to talk with. > > > Have fun, > ozaki-r
I've prepared complete patches ready to commit: https://www.netbsd.org/~ozaki-r/tweak-MAKEDEV.diff https://www.netbsd.org/~ozaki-r/vio9p.diff https://www.netbsd.org/~ozaki-r/vio9p-configs.diff https://www.netbsd.org/~ozaki-r/mount_9p-cdev.diff Any comments? I would like to commit them in several days if there is no objection. Regards, ozaki-r
