On 1/7/06, Avishay Traeger <atraeger@xxxxxxxxxxxxx> wrote:
On Sat, 2006-01-07 at 11:22 +0530, prasad Musale wrote:
> 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.
Hello,
May I ask what this project is for? I hope you realize that it has
already been done:
http://www.fsl.cs.sunysb.edu/project-raif.html
If you want to make a stackable file system, try using FiST:
http://www.fsl.cs.sunysb.edu/project-fist.html
You can also use the unionfs source code to help you, since it is also a
stackable fan-out file system:
http://www.fsl.cs.sunysb.edu/project-unionfs.html
Good luck.
Avishay Traeger
http://www.fsl.cs.sunysb.edu/~avishay/
Ya, I am doing same project(RAIF) as my final year of graduation. But not getting things right while analyzing code as I explained earlier.
Thanks
