Motivation:
The values use by aceflag4, acemask4 and acetype4 are wrapped by uint32_t
ints.

Modification:
Simplify aceflag4, acemask4 and acetype4 by dropping extra uint32 wrapper.

Result:
less work for GC.

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

Motivation:
The ACE flags are missing in the result of nfsace4#toString method and
introduce a confusion during debugging.

Modification:
include ACE flags in toString method

Result:
consistent output in logs

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

Motivation:
When an async server side copy is performed, then server must notify the
client on completion.

Modification:
Add copy-offload notification to the back channel.

Result:
the ground work for async server side copy

Acked-by: Paul Millar
Target: master

Motivation:
the newer libc make use of copy_file_range function, that directly
mapped to NFSv4.2 COPY request.

Modification:
Add initial implementation on OperationCOPY that synchronously copies
the data between two open files.

Result:
initial step to support intra-server copy.

Acked-by: Paul Millar
Target: master

Guava's implementation of Files#asCharSink s marked @Beta and can be replaced
with java native Files#writeString.

Result:
less dependency on guava's non stable API.

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

the call of Inode#toString for logging is redundant, especially when
logger is disabled.

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

Fixes: #103

Motivation:
There are no reasons to have to utility classes in a single package
(plus Himera vs Chimera)

Modification:
merge NameUtils and HimeraNfsUtils into single class Utils class,
including corresponding tests.

Result:
same code, less classes

Acked-by: Marina Sahakyan
Target: master

Motivation:
uid3 and gid3 object are wraps around uint32, which is by itself wrap around
int.

Modification:
simplify buid3 and gid3y wrapping directly int

Result:
less load on GC.

Acked-by: Paul Millar
Acked-by: Marina Sahakyan
Target: master

Motivation:
size3 object is a wrap around uint64, which is by itself wrap around
long.

Modification:
simplify size3 by wrapping directly long

Result:
less load on GC.

Acked-by: Marina Sahakyan
Acked-by: Paul Millar
Target: master

if client supports multiple layout types, then we need a way to specify which
one is needed.

Acked-by: Paul Millar
Target: master

re-format only

Motivation:
Current client uses LAYOUT4_NFSV4_1_FILES layout types independent from
what server is offering.

Modification:
Update client to show server side supported layout types and disable pNFS
if client doesn't supports any of them.

Result:
more debug possibilities

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

Not used as the functionality is handles by implementations of
LayoutDriver interface.

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

as dcache.org hae disabled http->https redirection some builds start to
fail.

Fixes: #98
Target: master, 0.22, 0.21

Motivation:
The state handler keeps track of NFSv4 clients. This duty is not
symmetric - updates happen when a client is added or removed, but
queried almost for any compound operation in a session. Thus on a
busy system we can observe thread serialization.

Modification:
replace synchronized blocks with read/write locks.

Result:
a better concurrency in a multi-client environment.

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

Motivation:
when estimating readdir reply size we should not forget about boolean
flag that indicates the presence of a next entry.

Modification:
fix entry overhead size.

Result:
The returned xdr doesn't overflow expected reply size.

Acked-by: Paul Millar
Target: master, 0.22

The exception is never thrown.

Acked-by: Lea Morschel
Target: master

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