[PATCH 0/5] net: Port NFS to LWIP

[Andrew Goodbody]

On 10/12/2025 12:55, Heinrich Schuchardt wrote:
> On 12/8/25 13:52, Andrew Goodbody wrote:
>> This series ports the existing NFS code so that it can be used with both
>> the legacy network code and also with LWIP.
>> Firstly some legacy network code, mostly variables, is moved into common
>> files so that it is accessible to LWIP.
>> Secondly the NFS code is refactored so that the parts that are not
>> specific to the network code can be shared with both network
>> implementations.
>> Finally the LWIP specific parts needed to interface the NFS shared code
>> to that network stack are added and enabled.
>>
>> Signed-off-by: Andrew Goodbody <andrew.goodbody at linaro.org>
>> ---
>> Andrew Goodbody (5):
>>        net: move net_state to net-common
>>        net: Move some variables to net-common files
>>        net: nfs: Add licence header
>>        net: nfs: Move most NFS code to common files
>>        net: lwip: nfs: Port the NFS code to work with LWIP
>>
>>   cmd/Kconfig          |  28 +-
>>   cmd/lwip/Makefile    |   1 +
>>   cmd/lwip/nfs.c       |  11 +
>>   include/net-common.h |  38 ++-
>>   include/net-legacy.h |  26 --
>>   include/net-lwip.h   |   1 +
>>   net/Makefile         |   1 +
>>   net/lwip/Makefile    |   1 +
>>   net/lwip/net-lwip.c  |   5 -
>>   net/lwip/nfs.c       | 282 +++++++++++++++++
>>   net/net-common.c     |  21 ++
>>   net/net.c            |  23 --
>>   net/nfs-common.c     | 863 +++++++++++++++++++++++++++++++++++++++++ 
>> ++++++++++
>>   net/nfs-common.h     | 123 ++++++++
>>   net/nfs.c            | 849 
>> +-------------------------------------------------
>>   net/nfs.h            |  59 ----
>>   16 files changed, 1368 insertions(+), 964 deletions(-)
>> ---
>> base-commit: 59f9fcc1f514762674ac07c13c2a85f7aace7250
>> change-id: 20251029-lwip_nfs-5385efca71bc
>>
>> Best regards,
> 
> Thank you for looking into the LWIP port.
> 
> We lack an NFS server in our Gitlab CI to run the NFS test.
> 
> For HTTP we are running
> python3 -m http.server 80 --directory "${UBOOT_TRAVIS_BUILD_DIR}"
> in .gitlab-ci.yml.
> 
> We should do something similar for NFS.
> 
> There is a userspace NFS server available
> at https://github.com/unfs3/unfs3.
> 
> This worked on my workstation:
> 
> cat > exports << EOF
> /home/ubuntu
> EOF
> ./unfsd -e `pwd`/exports  -u  -n 4096 -m 4096
> sudo mount -t nfs \
> -o port=4096,mountport=4096,mountvers=3,nolock \
> localhost:/home/ubuntu /mnt
> 
> Now in /mnt I could see the /home/ubuntu file-system.

Tom, is this something that can be added to the build containers?

> With LWIP we should think about enabling tcp for NFS.

As they say, patches are welcome, but it is unfortunately well outside 
the scope of this work.

Andrew

> Best regards
> 
> Heinrich