device: 0.238
other: 0.109
semantic: 0.097
PID: 0.095
performance: 0.083
graphic: 0.061
vnc: 0.050
debug: 0.049
network: 0.047
permissions: 0.041
files: 0.040
boot: 0.040
socket: 0.033
KVM: 0.020
files: 0.308
debug: 0.225
other: 0.114
network: 0.055
device: 0.053
PID: 0.051
semantic: 0.040
socket: 0.032
permissions: 0.028
performance: 0.024
graphic: 0.021
boot: 0.019
vnc: 0.015
KVM: 0.015

unable to read symlinks when mounting 9p filesystem with security_model=mapped

I am trying to use clang that is mounted from a 9p filesystem that has the options 
 -fsdev local,id=virtfs3,path=/clang,security_model=mapped-file -device virtio-9p-pci,fsdev=virtfs3,mount_tag=clang

clang has symlinks to clang-9. eg /clang/clang/bin/clang is a symlink that points to clang-9 in the current directory. 

the clang filesystem is on a bind mount point on /clang/clang on the host and this is mapped to the same place on the guest. If I have the same virtfs mount point with the security_model=none I don't have this problem.

On the host: readlink clang
clang-9

and guest:

ls: cannot read symbolic link 'clang': No such file or directory
lrwxrwxrwx 1 root root 7 May 30 02:21 clang

readlink clang

returns nothing.


This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/173