NFS mount over UDP fails on kernel 6.6

[Matheus Machado Guilhermino]

Brief Description
-----------------
When installing an AIO-DX system using kernel 6.6, controller-1 install fails when attempting to execute nfs mounts due to "malformed" UDP response that are too short and contain checksum errors.

Severity
--------
Critical

Steps to Reproduce
------------------
Steps to reproduce:

(1)init repo

repo init -u https://opendev.org/starlingx/manifest -b f/kernel-6.6

repo sync --force-sync

(2) build-pkgs; build-image; start AIO-DX install.

Expected Behavior
------------------
Controller-1 installed and configured

Actual Behavior
----------------
Controller-1 is not installed

Reproducibility
---------------
100%

System Configuration
--------------------
Two node system

Last Pass
---------
Never on kernel 6.6

Timestamp/Logs
--------------
[ 202.496856] controller_config[4072]: mount.nfs: Connection timed out
[ 202.505412] controller_config[5006]: ****************************************************
[ 202.515062] controller_config[5006]: ****************************************************
[ 202.525062] controller_config[5006]: Unable to mount /opt/platform
[ 202.533056] controller_config[5006]: ****************************************************
[ 202.543058] controller_config[5006]: ****************************************************
[ 202.553615] controller_config[3517]: Pausing for 5 seconds...

Test Activity
-------------
Developer Testing

Workaround
----------
Modify nfs_mount script to use TCP instead of UDP

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/kernel/+/922145
Committed: https://opendev.org/starlingx/kernel/commit/3c6402b23c7b87a6d43a2c0a62fe1720aa620011
Submitter: "Zuul (22348)"
Branch: f/kernel-6.6

commit 3c6402b23c7b87a6d43a2c0a62fe1720aa620011
Author: Matheus Guilhermino <email address hidden>
Date: Mon Jun 17 16:32:12 2024 -0300

    SUNRPC: avoid zero-length UDP packets

    Cherry-picks commit 1d9cabe2817e ("SUNRPC: use request size to
    initialize bio_vec in svc_udp_sendto()") from linux-yocto in order
    to use the proper size when setting up the bio_vec, as otherwise
    only zero-length UDP packets will be sent.

    * commit d9cabe2817e ("SUNRPC: use request size to initialize
      bio_vec in svc_udp_sendto()")
      https://git.yoctoproject.org/linux-yocto/commit/?id=1d9cabe2817e

    Test Plan:
    PASS: Succesful NFS mount during C-1 install of an AIO-DX

    Closes-bug: 2069643

    Change-Id: Iac09d24ff5f3cc4c64690e1c42356d7f57f95d66
    Signed-off-by: Matheus Guilhermino <email address hidden>

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/kernel/+/923005
Committed: https://opendev.org/starlingx/kernel/commit/c75144224057b36a88700ba11cf65327ca8f48ff
Submitter: "Zuul (22348)"
Branch: master

commit c75144224057b36a88700ba11cf65327ca8f48ff
Author: Matheus Guilhermino <email address hidden>
Date: Mon Jun 17 16:32:12 2024 -0300

    SUNRPC: avoid zero-length UDP packets

    Cherry-picks commit 1d9cabe2817e ("SUNRPC: use request size to
    initialize bio_vec in svc_udp_sendto()") from linux-yocto in order
    to use the proper size when setting up the bio_vec, as otherwise
    only zero-length UDP packets will be sent.

    * commit d9cabe2817e ("SUNRPC: use request size to initialize
      bio_vec in svc_udp_sendto()")
      https://git.yoctoproject.org/linux-yocto/commit/?id=1d9cabe2817e

    Test Plan:
    PASS: Succesful NFS mount during C-1 install of an AIO-DX

    Closes-bug: 2069643

    Change-Id: Iac09d24ff5f3cc4c64690e1c42356d7f57f95d66
    Signed-off-by: Matheus Guilhermino <email address hidden>
    (cherry picked from commit 3c6402b23c7b87a6d43a2c0a62fe1720aa620011)
    Signed-off-by: Jiping Ma <email address hidden>