FireMarshal does not support being run out of a NFS-mounted directory

[jerryz123]

Default runs of FireMarshal in a NFS-mounted directory will result in

Running: "guestmount --pid-file guestmount.pid -a /nscratch/jerryz/chipyard-proj/chipyard4/software/firemarshal/images/br-base.img -m /dev/sda /nscratch/jerryz/chipyard-proj/chipyard4/software/firemarshal/disk-mount" in /nscratch/jerryz/chipyard-proj/chipyard4/software/firemarshal
fusermount: failed to open mountpoint for reading: Permission denied
libguestfs: error: fuse_mount: /nscratch/jerryz/chipyard-proj/chipyard4/software/firemarshal/disk-mount: Operation not permitted
TaskError - taskid:/nscratch/jerryz/chipyard-proj/chipyard4/software/firemarshal/images/br-base.img

I'm not familiar with the details here, but there seems to be some issue with FUSE and NFS.

The workaround I am using is to set mnt-dir in wlutil.py to a local directory.

[NathanTP]

I don't think generally fixing this is feasible. It's only an issue with setups that don't have sudo and it seems like a fundamental problem. Autodetecting this corner case and working around it also doesn't seem like it's worth the extra complexity.

I will make the manual workaround easier though by allowing the user to override mnt-dir in their config or with an environment variable.