path: root/Documentation
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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-20 14:04:11 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-20 14:04:11 -0800
commit982197277c85018cc6eb77f1d3bef17933b0c5fd (patch)
tree805fcef9ec7c1e83867b89332fd37f751594fae3 /Documentation
parent40889e8d9fc6355980cf2bc94ef4356c10dec4ec (diff)
parent24ffb93872f7363a01ad639e3c8a9889b46c3f0a (diff)
Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux
Pull nfsd update from Bruce Fields: "Included this time: - more nfsd containerization work from Stanislav Kinsbursky: we're not quite there yet, but should be by 3.9. - NFSv4.1 progress: implementation of basic backchannel security negotiation and the mandatory BACKCHANNEL_CTL operation. See http://wiki.linux-nfs.org/wiki/index.php/Server_4.0_and_4.1_issues for remaining TODO's - Fixes for some bugs that could be triggered by unusual compounds. Our xdr code wasn't designed with v4 compounds in mind, and it shows. A more thorough rewrite is still a todo. - If you've ever seen "RPC: multiple fragments per record not supported" logged while using some sort of odd userland NFS client, that should now be fixed. - Further work from Jeff Layton on our mechanism for storing information about NFSv4 clients across reboots. - Further work from Bryan Schumaker on his fault-injection mechanism (which allows us to discard selective NFSv4 state, to excercise rarely-taken recovery code paths in the client.) - The usual mix of miscellaneous bugs and cleanup. Thanks to everyone who tested or contributed this cycle." * 'for-3.8' of git://linux-nfs.org/~bfields/linux: (111 commits) nfsd4: don't leave freed stateid hashed nfsd4: free_stateid can use the current stateid nfsd4: cleanup: replace rq_resused count by rq_next_page pointer nfsd: warn on odd reply state in nfsd_vfs_read nfsd4: fix oops on unusual readlike compound nfsd4: disable zero-copy on non-final read ops svcrpc: fix some printks NFSD: Correct the size calculation in fault_inject_write NFSD: Pass correct buffer size to rpc_ntop nfsd: pass proper net to nfsd_destroy() from NFSd kthreads nfsd: simplify service shutdown nfsd: replace boolean nfsd_up flag by users counter nfsd: simplify NFSv4 state init and shutdown nfsd: introduce helpers for generic resources init and shutdown nfsd: make NFSd service structure allocated per net nfsd: make NFSd service boot time per-net nfsd: per-net NFSd up flag introduced nfsd: move per-net startup code to separated function nfsd: pass net to __write_ports() and down nfsd: pass net to nfsd_set_nrthreads() ...
Diffstat (limited to 'Documentation')
1 files changed, 4 insertions, 16 deletions
diff --git a/Documentation/filesystems/nfs/nfs41-server.txt b/Documentation/filesystems/nfs/nfs41-server.txt
index 092fad92a3f..01c2db76979 100644
--- a/Documentation/filesystems/nfs/nfs41-server.txt
+++ b/Documentation/filesystems/nfs/nfs41-server.txt
@@ -39,21 +39,10 @@ interoperability problems with future clients. Known issues:
from a linux client are possible, but we aren't really
conformant with the spec (for example, we don't use kerberos
on the backchannel correctly).
- - Incomplete backchannel support: incomplete backchannel gss
- support and no support for BACKCHANNEL_CTL mean that
- callbacks (hence delegations and layouts) may not be
- available and clients confused by the incomplete
- implementation may fail.
- We do not support SSV, which provides security for shared
client-server state (thus preventing unauthorized tampering
with locks and opens, for example). It is mandatory for
servers to support this, though no clients use it yet.
- - Mandatory operations which we do not support, such as
- DESTROY_CLIENTID, are not currently used by clients, but will be
- (and the spec recommends their uses in common cases), and
- clients should not be expected to know how to recover from the
- case where they are not supported. This will eventually cause
- interoperability failures.
In addition, some limitations are inherited from the current NFSv4
@@ -89,7 +78,7 @@ Operations
| | MNI | or OPT) | |
| ACCESS | REQ | | Section 18.1 |
-NS | BACKCHANNEL_CTL | REQ | | Section 18.33 |
+I | BACKCHANNEL_CTL | REQ | | Section 18.33 |
I | BIND_CONN_TO_SESSION | REQ | | Section 18.34 |
| CLOSE | REQ | | Section 18.2 |
| COMMIT | REQ | | Section 18.3 |
@@ -99,7 +88,7 @@ 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_CLIENTID | REQ | | Section 18.50 |
I | DESTROY_SESSION | REQ | | Section 18.37 |
I | EXCHANGE_ID | REQ | | Section 18.35 |
I | FREE_STATEID | REQ | | Section 18.38 |
@@ -192,7 +181,6 @@ EXCHANGE_ID:
* backchannel attributes are ignored
-* backchannel security parameters are ignored
* no support for dynamic slot table renegotiation (optional)
@@ -202,7 +190,7 @@ Nonstandard compound limitations:
ca_maxrequestsize request and a ca_maxresponsesize reply, so we may
fail to live up to the promise we made in CREATE_SESSION fore channel
-* No more than one IO operation (read, write, readdir) allowed per
- compound.
+* No more than one read-like operation allowed per compound; encoding
+ replies that cross page boundaries (except for read data) not handled.
See also http://wiki.linux-nfs.org/wiki/index.php/Server_4.0_and_4.1_issues.