PNFS Todo List
From Linux NFS
(Difference between revisions)
BennyHalevy (Talk | contribs) |
BennyHalevy (Talk | contribs) (→NFSv4.1 (sessions) Todo List) |
||
Line 19: | Line 19: | ||
** The motivation is disabling 4.1 on the server without having to rebuild the kernel. Some use cases: a faulty 4.1 client, | ** The motivation is disabling 4.1 on the server without having to rebuild the kernel. Some use cases: a faulty 4.1 client, | ||
or one that's crashing the server, or just for easier debugging of the client (4.1 client mounting a 4.0 server). | or one that's crashing the server, or just for easier debugging of the client (4.1 client mounting a 4.0 server). | ||
+ | |||
+ | * [2008-05-22] (low priority) Investigate getting rid of extra indirection level of callback API for the filesystem. Currently the exported filesystem calls a pnfsd function with void* parameter that calls another function via a pointer in struct export_operations. Since we don't really need this abstraction the filesystem can just directly call the EXPORTed API function (that's currently pointed to in export_operations). | ||
== pNFS Todo List == | == pNFS Todo List == |
Revision as of 07:38, 22 May 2008
NFSv4.1 (sessions) Todo List
- [2008-04-07] Support concurrent nfsv4.0 and 4.1.
- Get rid of global nfs4_procedures and move the pointer to struct nfs_client. (TBD)
- 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)
- 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)
- 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.
- "{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]".
- [2008-04-10] Add an option to control nfsv4.1 on the server side.
- The motivation is disabling 4.1 on the server without having to rebuild the kernel. Some use cases: a faulty 4.1 client,
or one that's crashing the server, or just for easier debugging of the client (4.1 client mounting a 4.0 server).
- [2008-05-22] (low priority) Investigate getting rid of extra indirection level of callback API for the filesystem. Currently the exported filesystem calls a pnfsd function with void* parameter that calls another function via a pointer in struct export_operations. Since we don't really need this abstraction the filesystem can just directly call the EXPORTed API function (that's currently pointed to in export_operations).
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.