Hello Friends,
I am doing work on stackable file system RAIF, which implements the RAID functionality at file system level. I got confused about where to put my stackable functions. E.g. for reading a file sys_read calls the vfs_read(), which in turn calls the lower level fs read() function(In most of the fs it's generic_file_read()). Generic_file_read() uses page cache & get page from disk .Now if I want to add my functionality(Stripping or mirroring), where should I add it? In generic_file_read() or before generic_file_read(that means capturing the pointer from vfs, adding our function & then calling generic_file_read.)?
Does anyone knows more about stackable fs. I know the basic design but do not know it at coding level.
Thanks.
