Please read the document
Description of Partition Surprise Library API shipped along this one which is essential before
reading the following text. This documentation is destined only for
(co-)authors of filesystem modules found in surprise/fs/*
subdirectories. It is definitely not interesting to users of libsuprise
or even casual users.
Most parts of the following document will be strongly related to
struct fs_calls found in include/fs.h, please have it
handy during the reading.