Re: [PATCH rdma-next v3 00/14] RDMA: Make device names unique per net namespace

[Jiri Pirko <jiri@resnulli.us>]

Thu, Jul 16, 2026 at 03:23:01PM +0200, jiri@resnulli.us wrote:
>From: Jiri Pirko <jiri@nvidia.com>
>
>RDMA device names are unique system-wide today:
>__ib_device_get_by_name() checks a requested name against every
>registered device regardless of the network namespace it lives in.
>A device in one network namespace therefore cannot use a name already
>taken in another, even in exclusive netns mode (netns_mode=0) where
>the two are otherwise isolated. Net devices have no such restriction -
>their names only need to be unique within a network namespace.
>
>This series makes RDMA device names unique per network namespace,
>matching net device semantics, and adapts the users that assumed
>system-wide unique names.
>
>Scoping reuses the existing rdma_dev_access_netns() predicate, so
>behavior only changes in exclusive mode:
>  - shared mode (default): names stay unique system-wide, no change;
>  - exclusive mode: names only need to be unique within a namespace;
>  - CONFIG_NET_NS=n: everything is init_net, names stay system-wide
>    unique.
>
>There are two users that cannot be made per-namespace and are
>documented as known limitations instead of changed:
>  - the rdma_cm configfs tree: configfs has no network namespace
>    support, so it cannot represent two same-named devices;
>  - SELinux ibendport labelling: endports are labelled by (device
>    name, port) from a global policy; distinguishing same-named
>    devices would need net namespace support in the SELinux policy
>    language and tooling.
>
>Tested with the new rxe_netns_names kselftest added in the last patch.

This looks like good to go. All Sashiko findings are false positive or
unrelated. Care to merge? Thanks!