SSDFS file system driver

* DESCRIPTION

SSDFS is flash-friendly file system is designed with the goals:
 (1) take into account the ZNS and FDP SSD models;
 (2) descrease as much as possible the write amplification issue;
 (3) eliminate the GC activity;
 (4) widely use the compression, compaction, delta-encoding, and deduplication;
 (5) prolong SSD lifetime;
 (6) store more data than physical capacity of the device;
 (7) guarantee stable performance;
 (8) provide the strong file system reliability;
 (9) give the easy way of data recovery in the case of failure or user mistakes.