The iovec write_vecs[] array on the stack was just 2 element, but we
sometimes use 3 elements of it. This was causing random crashes due to
corrupting the stack.
Closes: #3110
Approved by: alexlarsson
This is necessary so as to not leave the revokefs backend around
when the system-helper exits abruptly (e.g. OOM killer). It would
be a vulnerability if revokefs backend continues to live even after
the system-helper is killed as it might lead to write access to the
underlying directory.
Closes: #2657
Approved by: alexlarsson
The demo starts two instances by the same users so
the revoke doesn't really enforce any separation, but
it demos how you would do it.
Closes: #2657
Approved by: alexlarsson
By default we just spawn a writer from the fuse implementation,
but you can also do it manually with --backend and --socket,
allowing you to start the two in different contexts.
Closes: #2657
Approved by: alexlarsson
