Running "go test" in the collector directory, without the fixtures
available, results in multiple panics, including `SIGSEGV`. Most of
these are due to incorrect error handling. This cleans them up.
Signed-off-by: Benny Siegert <bsiegert@gmail.com>
* Improve metrics filesystem scanning logic
* Makes ioctl syscalls to load the device error stats.
* Adds filesystem mountpoint labels to existing metrics for ease of use.
Signed-off-by: Marcus Cobden <leth@users.noreply.github.com>
