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Commit 18d1aef8 authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

nfsd: update documentation for pNFS support 



Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent c5c707f9

Documentation/filesystems/nfs/nfs41-server.txt

+8 −15
Original line number Diff line number Diff line
@@ -24,11 +24,6 @@ focuses on the mandatory-to-implement NFSv4.1 Sessions, providing 
"exactly once" semantics and better control and throttling of the

resources allocated for each client.



Other NFSv4.1 features, Parallel NFS operations in particular,

are still under development out of tree.

See http://wiki.linux-nfs.org/wiki/index.php/PNFS_prototype_design

for more information.



The table below, taken from the NFSv4.1 document, lists

the operations that are mandatory to implement (REQ), optional

(OPT), and NFSv4.0 operations that are required not to implement (MNI)
@@ -43,9 +38,7 @@ The OPTIONAL features identified and their abbreviations are as follows: 
The following abbreviations indicate the linux server implementation status.

	I	Implemented NFSv4.1 operations.

	NS	Not Supported.

	NS*	unimplemented optional feature.

	P	pNFS features implemented out of tree.

	PNS	pNFS features that are not supported yet (out of tree).

	NS*	Unimplemented optional feature.



Operations
@@ -70,13 +63,13 @@ I | DESTROY_SESSION | REQ | | Section 18.37 | 
I  | EXCHANGE_ID          | REQ        |              | Section 18.35  |

I  | FREE_STATEID         | REQ        |              | Section 18.38  |

   | GETATTR              | REQ        |              | Section 18.7   |

P  | GETDEVICEINFO        | OPT        | pNFS (REQ)   | Section 18.40  |

P  | GETDEVICELIST        | OPT        | pNFS (OPT)   | Section 18.41  |

I  | GETDEVICEINFO        | OPT        | pNFS (REQ)   | Section 18.40  |

NS*| GETDEVICELIST        | OPT        | pNFS (OPT)   | Section 18.41  |

   | GETFH                | REQ        |              | Section 18.8   |

NS*| GET_DIR_DELEGATION   | OPT        | DDELG (REQ)  | Section 18.39  |

P  | LAYOUTCOMMIT         | OPT        | pNFS (REQ)   | Section 18.42  |

P  | LAYOUTGET            | OPT        | pNFS (REQ)   | Section 18.43  |

P  | LAYOUTRETURN         | OPT        | pNFS (REQ)   | Section 18.44  |

I  | LAYOUTCOMMIT         | OPT        | pNFS (REQ)   | Section 18.42  |

I  | LAYOUTGET            | OPT        | pNFS (REQ)   | Section 18.43  |

I  | LAYOUTRETURN         | OPT        | pNFS (REQ)   | Section 18.44  |

   | LINK                 | OPT        |              | Section 18.9   |

   | LOCK                 | REQ        |              | Section 18.10  |

   | LOCKT                | REQ        |              | Section 18.11  |
@@ -122,9 +115,9 @@ Callback Operations 
   |                         | MNI       | or OPT)     |               |

   +-------------------------+-----------+-------------+---------------+

   | CB_GETATTR              | OPT       | FDELG (REQ) | Section 20.1  |

P  | CB_LAYOUTRECALL         | OPT       | pNFS (REQ)  | Section 20.3  |

I  | CB_LAYOUTRECALL         | OPT       | pNFS (REQ)  | Section 20.3  |

NS*| CB_NOTIFY               | OPT       | DDELG (REQ) | Section 20.4  |

P  | CB_NOTIFY_DEVICEID      | OPT       | pNFS (OPT)  | Section 20.12 |

NS*| CB_NOTIFY_DEVICEID      | OPT       | pNFS (OPT)  | Section 20.12 |

NS*| CB_NOTIFY_LOCK          | OPT       |             | Section 20.11 |

NS*| CB_PUSH_DELEG           | OPT       | FDELG (OPT) | Section 20.5  |

   | CB_RECALL               | OPT       | FDELG,      | Section 20.2  |