Motivation:
Though bitmap can have an arbitrary length, the linux 5.10 client expects
device notification bitmap to be size of one (1).

Modification:
Update OperationGETDEVICEINFO to initialize resulting notification bitmap
with the length that matches requested notification bitmap.

Result:
Linux 5.10 client processes the result of getdeviceinfo operation as expected.

Target: 0.22, master
Acked-by: Paul Millar
Acked-by: Albert Rossi

Motivation:
new major version update with improvements and breaking changes:

- Drop dependency on dcache-auth , which had incompatible license
- Experimental AUTH_TLS support
- Various javadoc improvements
- Improved code coverage
- removed direct dependency on grizzly-framework-monitoring

The result of removal of license incompatible dcache-auth in oncrpc4j is
migration from org.dcache.auth.GidPrincipal and org.dcache.auth.UidPrincipal
to com.sun.security.auth.UnixNumericGroupPrincipal and
com.sun.security.auth.UnixNumericUserPrincipa. This breaking change have
to be handled in nfs4j.

Modification:
Update pom to use oncrpc4j-3.1.0. Introduce UnixSubjects that provides
alternative to org.dcache.auth.Subjects. Update code base to match API
changes.

Result:
The nfs4j has no dependency with conflicting license. Support for
nfs-over-tls.

WARNING: this is a breaking change that requires changes in VirtualFileSystem
implementations.

Acked-by: Paul Millar
Target: master

Motivation:
The NfsLoginService aimed to handle RPCSEC_GSS based session and
map GSS context to appropriate Subject. However, this is always
handled by RPC layer (after split of nfs and rpc modules into different
projects). Thus NfsLoginService is simply a dead code.

Modification:
remove NfsLoginService interface

Result:
less dead code

Acked-by: Paul Millar
Acked-by: Lea Morschel
Target: master

Motivation:
the UnixUtils used by nfs client to extract curren user with the help of
reflection. As com.sun.security.auth.module.UnixSystem is a part of
official OpenJDK, there are no reasons to hide it usage.

Modification:
update nfs client to directly call
com.sun.security.auth.module.UnixSystem.

Result:
less magic in the code.

Acked-by: Paul Millar
Target: master

modernize

Acked-by: Paul Millar
Target: master

Motivation:
The read/write buffer size between a and the data server is offered by
MDS. Currently, this value is hard coded to 64k, which is not optimal
value for modern hardware.

Modification:
Allow mds to specify preferred IO size for DS. Though this value can be
different for each data server, we use a single buffer size by assuming
that in typical installation data servers have a similar IO
capabilities.

As Linux client uses single value for rsize and wsize, we use (for
pragmatic reasons) a single value as well.

Result:
The IO size between clients and the server can be configured.

Acked-by: Paul Millar
Target: master

build(deps): bump junit from 4.12 to 4.13.1

Bumps [junit](https://github.com/junit-team/junit4) from 4.12 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.12.md)
- [Commits](https://github.com/junit-team/junit4/compare/r4.12...r4.13.1

)

Signed-off-by: dependabot[bot] <support@github.com>

fix

/data: 10.1.0.1(RW,root_squash,noacl,sec=SYSsecure,,dcap,pnfs,anonuid=1001,anongid=65534):idx=2eefc9
                                                 ^^^^^^
to

/data: 10.1.0.1(RW,root_squash,noacl,sec=SYS,secure,dcap,pnfs,anonuid=1001,anongid=65534):idx=2eefc9

Acked-by: Lea Morschel
Target: master

move return statement into try-catch block for better readability

Acked-by: Lea Morschel
Acked-by: Paul Millar
Target: master

Acked-by: Paul Millar
Acked-by: Lea Morschel
Target: master

Motivation:
In some environments we might want to enforce clients to come from a
privileged port (< 1024), e.g. to be sure that request is send by kernel
process.

Modification:
Add secure/insecure export options (like in linux and solaris servers).
Update PseudoFs to to check for privileged client port, if required.

Result:
nfs clients can be restricted to privileged (root) users.

Acked-by: Lea Morschel
Acked-by: Paul Millar
Target: master

Motivation:
The nfs spec requires, that after restart client presents the same
client id. Though this is not that important for the test client,
however, makes testing more reliable.

Modification:
generate client is string to be

java class name + user + host name.

for example: org.dcache.nfs.v4.client.Main: tigran on nairi

Result:
server friendly test client.

Acked-by: Paul Millar
Acked-by: Lea Morschel
Target: master

Motivation:
Some NFSv4.1 operations must be bound to a session, some are not. Thus
for some compound requests the first operations must be SEQUENCE, that
specifies the session id, slot to use and sequence.

Modification:
introduce sendCompoundInSession method that takes care about session
bookkeeping.

Result:
Automatic session processing when the corresponding sendCompound is
used.

Acked-by: Paul Millar
Target: master

Motivation:
client session slot handling is not only used by call-back but as well
by a regular client and proxy-io client inside dCache. Thus, this functionality
should be shared to reduce code duplication.

Modification:
introduce ClientSession class that does the session slot management.

Result:
client side session slot management can be shared with other classes.

Acked-by: Paul Millar
Acked-by: Lea Morschel
Target: master

If we want to build a GETATTR request with to retrieve the file handle,
then we should be able to process the result.

Acked-by: Paul Millar
Acked-by: Lea Morschel
Target: master

make readdir request size reasonable (equal to linux kernel)
for better performance with big directories.

Acked-by: Lea Morschel
Acked-by: Paul Millar
Acked-by: Albert Rossi
Target: master

and rename some fields to make them more obvious.

Acked-by: Lea Morschel
Acked-by: Paul Millar
Target: master

Motivation:
The NFSv4.1 server might decide to send multiple callback to a client.
The parallelism is defined by number of callback slots specified by the
client. As each slot maintain it's own sequence, a new request can be
sent only when the slot is not in use.

Modification:
Introduce a ClientCB$SesionSlot class that represents session slot and
associated sequence. Introduce a blocking queue, that represents
available session slots. When slot is used, then it removed from the
queue and putted back, after callback is complete.

Result:
Multiple callbacks can be issued to the client in parallel without
misordering the requests.

Acked-by: Paul Millar
Target: master

Motivation:
When server performs callback to a client it must use the same nfsv4
minor version as client uses.

Modification:
store client's minor version information with call-back object.

Result:
fixes compatibility with nfsv4.2 clients.

Acked-by: Albert Rossi
Acked-by: Lea Morschel
Acked-by: Paul Millar
Target: master, 0.21

The LOCKT operation falsely assumes, that client id of a test operation
is not required to be valid.

Enforce clientid validity by querying state manager v4.0 or derive from
the session, for v4.1 and later.

Acked-by: Albert Rossi
Target: master

NFS spec is more restrictive to what is allowed with LOCKT operation

Acked-by: Albert Rossi
Target: master

less dependency on Guava without functional changes.

Acked-by: Paul Millar
Acked-by: Lea Morschel
Target: master

Acked-by: Lea Morschel
Acked-by: Svenja Meyer
Target: master

Acked-by: Albert Rossi
Target: master

Acked-by: Lea Morschel
Acked-by: Albert Rossi
Target: master

Acked-by: Lea Morschel
Acked-by: Paul Millar
Acked-by: Albert Rossi
Target: master

Acked-by: Lea Morschel
Acked-by: Albert Rossi
Acked-by: Paul Millar
Target: master

we must always use the same method when a binary object converted into
a String key used as lock identifier.

Acked-by: Lea Morschel
Acked-by: Albert Rossi
Acked-by: Paul Millar
Target: master

Acked-by: Lea Morschel
Acked-by: Albert Rossi
Acked-by: Paul Millar
Target: master

time to move on ...

Acked-by: Lea Morschel
Target: master

Acked-by: Paul Millar
Acked-by: Lea Morschel
Target: master