pfs

PFS is a try to design a filesytem by myself, it's designed depend on inode , and ensure the consistency of the filesystem.
The first version, pfs is a application program for linux, now it's a driver for linux.
pfs isn't depend on bit map or btree, it also don't support log. At the first version, i try to deal with the dependency of filesystem to make sure the consistency for filesystem.now, i want to improve the measure, so the driver for linux don't ensure the consistency fo filesystem(i will support at next version).
pfs don't support extended attributes now, i obligate 8k for every inode to support extended attributes in the feature.