Hmm… so this dates back quite long ago unfortunately, I had basically forgotten about this bug report as I had opened it while just experimenting with qemu.
To the best of my recollection, this was happening with a NixOS, either 16.09, 17.03 or unstable, at an update that was probably within 0-2 months of the time I made the bug report. Now, I guess the best may be to just close as can't reproduce, as I no longer have the code originally used to trigger the issue anyway? Either way, thank you for your feedback! -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1673957 Title: virtfs: mapped-xattr on mount point Status in QEMU: Incomplete Bug description: With -virtfs local,path="/tmp",security_model=mapped-xattr,mount_tag="shared2" in the qemu command line, shared2 on /mnt/testbis type 9p (rw,sync,dirsync,relatime,trans=virtio,version=9p2000.L,msize=262144) in the guest mount points, and tmpfs on /tmp type tmpfs (rw,nosuid,nodev) in the host mount points (with CONFIG_TMPFS_XATTR=y according to zgrep /proc/config.gz), running qemu as user "vm-test", trying to "touch a" in /mnt/testbis on the VM fails with "Operation not supported". In addition, no file or directory actually present in the host's /tmp can be seen in the guest's /mnt/testbis. When trying to replace "/tmp" with "/tmp/aaa" on the host, with /tmp/aaa owned by root:root, still running qemu as vm-test, trying to run "ls" in the guest's /mnt/testbis fails with the weird "ls: reading directory '.': Cannot allocate memory", while the directory is empty. After a "chown vm-test /tmp/aaa", the guest can list the files (despite the permissions already allowing it to do so before), but still not write new files: "cannot touch 'b': Operation not supported". Do you have a pointer as to what is happening? PS: complete setup is running all this inside a qemu VM that I use for testing, I guess it shouldn't matter but saying it just in case To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1673957/+subscriptions
