[pnfs] updated todo list wiki page created

[Benny Halevy]

See https://wiki.linux-nfs.org/wiki/index.php/PNFS_Todo_List

Currently on this page is the list below.
I probably missed a lot of stuff so please update the page/
reply to this email.

Benny

NFSv4.1 (sessions) Todo List

    *  [2008-04-07] Support concurrent nfsv4.0 and 4.1.
          o Get rid of global nfs4_procedures and move the pointer to struct nfs_client. (TBD)
          o nfs_version4 should not be global. We apparently need to either:
                + Split nfs_version and nfs_program to nfs_{version,program}4 and nfs_{version,program}41, make them static in fs/nfs/client.c and use either based on minorversion, or
                + teach rpc code, e.g. rpc_bind_new_program about minor version (and represent it in struct rpc_version). (TBD) 
          o Manage callback threads for 4.0 and 4.1
                + Can either keep a separate use count, or
                + bring them up and down together. (TBD) 

    * [2008-04-07] Prepare and send nfs41 patches for review. (bhalevy)
          o Depends on support for concurrent 4.0 and 4.1 mounts. 

    * [2008-04-07] Add an option for nfsv4.1 to the nfs mount program.
          o "{nfs,}vers=41" seems to be the most appropriate. See nfs_mount_option_tokens in fs/nfs/super.c. Note that kernel nfs root (in fs/nfs/nfsroot.c does not current (2.6.25-rc8) support root over nfsv4 only "nfsvers=[23]". 

pNFS Todo List

    * Agree on LD API changes for block layout (Fred and Dean) then merge generic pnfs patch (fred-pnfs) into pnfs branch. (bhalevy) 

    * [2008-04-02] Implement layout stateid as per draft-21+ (bhalevy) 

    * [2008-04-02] Implement pnfs-aware page sync state model.