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Subject: Re: [PATCH 0/7 V4] The NFSv4 only mounting daemon.
To:     "J. Bruce Fields" <bfields@fieldses.org>
Cc:     Linux NFS Mailing list <linux-nfs@vger.kernel.org>
References: <20210219200815.792667-1-steved@redhat.com>
 <20210224203053.GF11591@fieldses.org>
From:   Steve Dickson <SteveD@RedHat.com>
Message-ID: <1553fb2d-9b8e-f8eb-8c72-edcd14a2ad08@RedHat.com>
Date:   Tue, 2 Mar 2021 17:33:23 -0500
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On 2/24/21 3:30 PM, J. Bruce Fields wrote:
> On Fri, Feb 19, 2021 at 03:08:08PM -0500, Steve Dickson wrote:
>> nfsv4.exportd is a daemon that will listen for only v4 mount upcalls.
>> The idea is to allow distros to build a v4 only package
>> which will have a much smaller footprint than the
>> entire nfs-utils package.
>>
>> exportd uses no RPC code, which means none of the 
>> code or arguments that deal with v3 was ported, 
>> this again, makes the footprint much smaller. 
> 
> How much smaller?
Will a bit smaller... but a number of daemons like nfsd[cld,clddb,cldnts]
need to also come a long. 
> 
>> The following options were ported:
>>     * multiple threads
>>     * state-directory-path option
>>     * junction support (not tested)
>>
>> The rest of the mountd options were v3 only options.
> 
> There's also --manage-gids.
Right... a patch was posted... 

> 
> If you want nfsv4-only at runtime, you can always run rpc.mountd with
> -N2 -N3 to turn off the MOUNT protocol support.
The end game is not to run mountd at all... 

> 
> If you don't even want v2/f3 code on your system, then you may have to
> do something like this, but why is that important?
Container friendly... Not bring in all the extra daemons v3
needs is a good thing... esp rpcbind. 

steved.

> 
> --b.
> 
>>
>> V2:
>>   * Added two systemd services: nfsv4-exportd and nfsv4-server
>>   * nfsv4-server starts rpc.nfsd -N 3, so nfs.conf mod not needed.
>>
>> V3: Changed the name from exportd to nfsv4.exportd
>>
>> V4: Added compile flag that will compile in the NFSv4 only server
>>
>> Steve Dickson (7):
>>   exportd: the initial shell of the v4 export support
>>   exportd: Moved cache upcalls routines into libexport.a
>>   exportd: multiple threads
>>   exportd/exportfs: Add the state-directory-path option
>>   exportd: Enabled junction support
>>   exportd: systemd unit files
>>   exportd: Added config variable to compile in the NFSv4 only server.
>>
>>  .gitignore                                |   1 +
>>  configure.ac                              |  14 ++
>>  nfs.conf                                  |   4 +
>>  support/export/Makefile.am                |   3 +-
>>  {utils/mountd => support/export}/auth.c   |   4 +-
>>  {utils/mountd => support/export}/cache.c  |  46 +++-
>>  support/export/export.h                   |  34 +++
>>  {utils/mountd => support/export}/fsloc.c  |   0
>>  {utils/mountd => support/export}/v4root.c |   0
>>  {utils/mountd => support/include}/fsloc.h |   0
>>  systemd/Makefile.am                       |   6 +
>>  systemd/nfs.conf.man                      |  10 +
>>  systemd/nfsv4-exportd.service             |  12 +
>>  systemd/nfsv4-server.service              |  31 +++
>>  utils/Makefile.am                         |   4 +
>>  utils/exportd/Makefile.am                 |  65 +++++
>>  utils/exportd/exportd.c                   | 276 ++++++++++++++++++++++
>>  utils/exportd/exportd.man                 |  81 +++++++
>>  utils/exportfs/exportfs.c                 |  21 +-
>>  utils/exportfs/exportfs.man               |   7 +-
>>  utils/mountd/Makefile.am                  |   5 +-
>>  21 files changed, 606 insertions(+), 18 deletions(-)
>>  rename {utils/mountd => support/export}/auth.c (99%)
>>  rename {utils/mountd => support/export}/cache.c (98%)
>>  create mode 100644 support/export/export.h
>>  rename {utils/mountd => support/export}/fsloc.c (100%)
>>  rename {utils/mountd => support/export}/v4root.c (100%)
>>  rename {utils/mountd => support/include}/fsloc.h (100%)
>>  create mode 100644 systemd/nfsv4-exportd.service
>>  create mode 100644 systemd/nfsv4-server.service
>>  create mode 100644 utils/exportd/Makefile.am
>>  create mode 100644 utils/exportd/exportd.c
>>  create mode 100644 utils/exportd/exportd.man
>>
>> -- 
>> 2.29.2
>