mirror of
https://github.com/adulau/aha.git
synced 2024-12-28 11:46:19 +00:00
nfsd41: Documentation/filesystems/nfs41-server.txt
Initial nfs41 server write up describing the status of the linux server implementation. [nfsd41: document unenforced nfs41 compound ordering rules.] [get rid of CONFIG_NFSD_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Benny Halevy
J. Bruce Fields
parent
79fb54abd2
commit
3ef1728898
1 changed files with 161 additions and 0 deletions
161
Documentation/filesystems/nfs41-server.txt
Normal file
161
Documentation/filesystems/nfs41-server.txt
Normal file
|
|
@ -0,0 +1,161 @@
|
|||
NFSv4.1 Server Implementation
|
||||
|
||||
Server support for minorversion 1 can be controlled using the
|
||||
/proc/fs/nfsd/versions control file. The string output returned
|
||||
by reading this file will contain either "+4.1" or "-4.1"
|
||||
correspondingly.
|
||||
|
||||
Currently, server support for minorversion 1 is disabled by default.
|
||||
It can be enabled at run time by writing the string "+4.1" to
|
||||
the /proc/fs/nfsd/versions control file. Note that to write this
|
||||
control file, the nfsd service must be taken down. Use your user-mode
|
||||
nfs-utils to set this up; see rpc.nfsd(8)
|
||||
|
||||
The NFSv4 minorversion 1 (NFSv4.1) implementation in nfsd is based
|
||||
on the latest NFSv4.1 Internet Draft:
|
||||
http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-29
|
||||
|
||||
From the many new features in NFSv4.1 the current implementation
|
||||
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)
|
||||
in minor version 1. The first column indicates the operations that
|
||||
are not supported yet by the linux server implementation.
|
||||
|
||||
The OPTIONAL features identified and their abbreviations are as follows:
|
||||
pNFS Parallel NFS
|
||||
FDELG File Delegations
|
||||
DDELG Directory Delegations
|
||||
|
||||
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).
|
||||
|
||||
Operations
|
||||
|
||||
+----------------------+------------+--------------+----------------+
|
||||
| Operation | REQ, REC, | Feature | Definition |
|
||||
| | OPT, or | (REQ, REC, | |
|
||||
| | MNI | or OPT) | |
|
||||
+----------------------+------------+--------------+----------------+
|
||||
| ACCESS | REQ | | Section 18.1 |
|
||||
NS | BACKCHANNEL_CTL | REQ | | Section 18.33 |
|
||||
NS | BIND_CONN_TO_SESSION | REQ | | Section 18.34 |
|
||||
| CLOSE | REQ | | Section 18.2 |
|
||||
| COMMIT | REQ | | Section 18.3 |
|
||||
| CREATE | REQ | | Section 18.4 |
|
||||
I | CREATE_SESSION | REQ | | Section 18.36 |
|
||||
NS*| DELEGPURGE | OPT | FDELG (REQ) | Section 18.5 |
|
||||
| DELEGRETURN | OPT | FDELG, | Section 18.6 |
|
||||
| | | DDELG, pNFS | |
|
||||
| | | (REQ) | |
|
||||
NS | DESTROY_CLIENTID | REQ | | Section 18.50 |
|
||||
I | DESTROY_SESSION | REQ | | Section 18.37 |
|
||||
I | EXCHANGE_ID | REQ | | Section 18.35 |
|
||||
NS | 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 |
|
||||
| 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 |
|
||||
| LINK | OPT | | Section 18.9 |
|
||||
| LOCK | REQ | | Section 18.10 |
|
||||
| LOCKT | REQ | | Section 18.11 |
|
||||
| LOCKU | REQ | | Section 18.12 |
|
||||
| LOOKUP | REQ | | Section 18.13 |
|
||||
| LOOKUPP | REQ | | Section 18.14 |
|
||||
| NVERIFY | REQ | | Section 18.15 |
|
||||
| OPEN | REQ | | Section 18.16 |
|
||||
NS*| OPENATTR | OPT | | Section 18.17 |
|
||||
| OPEN_CONFIRM | MNI | | N/A |
|
||||
| OPEN_DOWNGRADE | REQ | | Section 18.18 |
|
||||
| PUTFH | REQ | | Section 18.19 |
|
||||
| PUTPUBFH | REQ | | Section 18.20 |
|
||||
| PUTROOTFH | REQ | | Section 18.21 |
|
||||
| READ | REQ | | Section 18.22 |
|
||||
| READDIR | REQ | | Section 18.23 |
|
||||
| READLINK | OPT | | Section 18.24 |
|
||||
NS | RECLAIM_COMPLETE | REQ | | Section 18.51 |
|
||||
| RELEASE_LOCKOWNER | MNI | | N/A |
|
||||
| REMOVE | REQ | | Section 18.25 |
|
||||
| RENAME | REQ | | Section 18.26 |
|
||||
| RENEW | MNI | | N/A |
|
||||
| RESTOREFH | REQ | | Section 18.27 |
|
||||
| SAVEFH | REQ | | Section 18.28 |
|
||||
| SECINFO | REQ | | Section 18.29 |
|
||||
NS | SECINFO_NO_NAME | REC | pNFS files | Section 18.45, |
|
||||
| | | layout (REQ) | Section 13.12 |
|
||||
I | SEQUENCE | REQ | | Section 18.46 |
|
||||
| SETATTR | REQ | | Section 18.30 |
|
||||
| SETCLIENTID | MNI | | N/A |
|
||||
| SETCLIENTID_CONFIRM | MNI | | N/A |
|
||||
NS | SET_SSV | REQ | | Section 18.47 |
|
||||
NS | TEST_STATEID | REQ | | Section 18.48 |
|
||||
| VERIFY | REQ | | Section 18.31 |
|
||||
NS*| WANT_DELEGATION | OPT | FDELG (OPT) | Section 18.49 |
|
||||
| WRITE | REQ | | Section 18.32 |
|
||||
|
||||
Callback Operations
|
||||
|
||||
+-------------------------+-----------+-------------+---------------+
|
||||
| Operation | REQ, REC, | Feature | Definition |
|
||||
| | OPT, or | (REQ, REC, | |
|
||||
| | MNI | or OPT) | |
|
||||
+-------------------------+-----------+-------------+---------------+
|
||||
| CB_GETATTR | OPT | FDELG (REQ) | Section 20.1 |
|
||||
P | 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_LOCK | OPT | | Section 20.11 |
|
||||
NS*| CB_PUSH_DELEG | OPT | FDELG (OPT) | Section 20.5 |
|
||||
| CB_RECALL | OPT | FDELG, | Section 20.2 |
|
||||
| | | DDELG, pNFS | |
|
||||
| | | (REQ) | |
|
||||
NS*| CB_RECALL_ANY | OPT | FDELG, | Section 20.6 |
|
||||
| | | DDELG, pNFS | |
|
||||
| | | (REQ) | |
|
||||
NS | CB_RECALL_SLOT | REQ | | Section 20.8 |
|
||||
NS*| CB_RECALLABLE_OBJ_AVAIL | OPT | DDELG, pNFS | Section 20.7 |
|
||||
| | | (REQ) | |
|
||||
I | CB_SEQUENCE | OPT | FDELG, | Section 20.9 |
|
||||
| | | DDELG, pNFS | |
|
||||
| | | (REQ) | |
|
||||
NS*| CB_WANTS_CANCELLED | OPT | FDELG, | Section 20.10 |
|
||||
| | | DDELG, pNFS | |
|
||||
| | | (REQ) | |
|
||||
+-------------------------+-----------+-------------+---------------+
|
||||
|
||||
Implementation notes:
|
||||
|
||||
EXCHANGE_ID:
|
||||
* only SP4_NONE state protection supported
|
||||
* implementation ids are ignored
|
||||
|
||||
CREATE_SESSION:
|
||||
* backchannel attributes are ignored
|
||||
* backchannel security parameters are ignored
|
||||
|
||||
SEQUENCE:
|
||||
* no support for dynamic slot table renegotiation (optional)
|
||||
|
||||
nfsv4.1 COMPOUND rules:
|
||||
The following cases aren't supported yet:
|
||||
* Enforcing of NFS4ERR_NOT_ONLY_OP for: BIND_CONN_TO_SESSION, CREATE_SESSION,
|
||||
DESTROY_CLIENTID, DESTROY_SESSION, EXCHANGE_ID.
|
||||
* DESTROY_SESSION MUST be the final operation in the COMPOUND request.
|
||||
|
||||
Loading…
Reference in a new issue