[Qemu-devel] [Bug 1831354] Re: unable to read symlinks when mounting 9p filesystem with security_model=mapped

[Olie Hilt]

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.

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https://bugs.launchpad.net/bugs/1831354

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

Status in QEMU:
  New

Bug description:
  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.

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