Re: [PATCH v5 3/4] RDMA/rxe: Support RDMA link creation and destruction per net namespace

[Leon Romanovsky <leon@kernel.org>]

On Tue, Mar 10, 2026 at 03:05:17AM +0100, Zhu Yanjun wrote:
> After introducing dellink handling and per-net namespace management
> for IPv4 and IPv6 sockets, extend rxe to create and destroy RDMA links
> within each network namespace.
> 
> With this change, RDMA links can be instantiated both in init_net and
> in other network namespaces. The lifecycle of the RDMA link is now tied
> to the corresponding namespace and is properly cleaned up when the
> namespace or link is removed.
> 
> This ensures rxe behaves correctly in multi-namespace environments and
> keeps socket and RDMA link resources consistent across namespace
> creation and teardown.
> 
> Signed-off-by: Zhu Yanjun <yanjun.zhu@linux.dev>
> ---
>  drivers/infiniband/sw/rxe/rxe.c     |  38 +++++++-
>  drivers/infiniband/sw/rxe/rxe_net.c | 145 +++++++++++++++++++++-------
>  drivers/infiniband/sw/rxe/rxe_net.h |   9 +-
>  3 files changed, 146 insertions(+), 46 deletions(-)

<...>

> +#define SK_REF_FOR_TUNNEL	2

<...>

> +#undef SK_REF_FOR_TUNNEL

We typically place defines at the beginning of a file and avoid undefining
them. The undef directive is mainly used when a macro is defined inside a
function.

Thanks