[lustre-devel] new LND number reservation

[Andreas Dilger]

On May 7, 2025, at 02:58, Sylvain GOUDEAU <sylvain.goudeau at eviden.com> wrote:

There is this comment in Lustre source code:

/* Please email adilger at whamcloud.com<mailto:adilger at whamcloud.com> and lustre-devel at lists.lustre.org<mailto:lustre-devel at lists.lustre.org>
  * to reserve new LND numbers before they are used anywhere.

We are starting to write an LND for the BXI 3 interconnect which is under development in our labs.
As discussed with  Peter Jones, we will try to make it available for Lustre 2.17.

Currently the next available slot looks like number 19:

        PTL4LND         = 15, /* ATOS/Bull Portals 4 for BXI          */
        KFILND          = 16, /* HPE Kernel Fabric Interface          */
        TOFULND         = 17, /* Fujitsu Torus Fusion                      */
        EFALND          = 18, /* Amazon Elastic Fabric Adapter  */
+      BXI3LND         = 19, /* Bull BXIv3 Fabric Interface            */

Thank you for your email.  This LND number is available, please submit a patch on master to reserve this number.

It would also be preferred to update libcfs_netstrfns[] to include the LND name, module name, and functions to map to/from the NID string.  That is fairly straight forward if addresses are numbers or IPv4/IPv6 addresses.  This allows routing to/from your network even if clients/servers do not have the BXI3LND functionality.

Our company is undergoing organizational changes so maybe there will be another company name next to "Bull".

That is fine, it doesn't affect any functionality.

Is it OK to reserve slot 19? Otherwise could you please indicate the next available slot number that can be reserved?
Don't hesitate to contact me or Gregoire for further information,

Cheers, Andreas
—
Andreas Dilger
Lustre Principal Architect
Whamcloud/DDN




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