[SPDK] Re: How to get transport ID from spdk_bdev

There's no readily available way to get transoprt id for nvme, but
respective call may be added to nvme_ctrlr.c. One could the call it with
bdev_nvme provided controller as an argument.

Regards,
Andrey

On Mon, Oct 26, 2020, 19:04 Luse, Paul E <paul.e.luse(a)intel.com> wrote:

> Hi Yawei,
>
> Generically the bdev layer won’t have anything like this but each bdev
> module supports its own set of RPCs that are specific to the bdev.  Take a
> look a the nvme bdev RPC rpc_dump_nvme_controller_info() and see if it has
> what you need.  New RPC’s can also be added as makes sense for various use
> cases (depending on what your inputs are desired outputs are)
>
> Hope that helps….
>
> Thx
> Paul
>
> From: Niu, Yawei <yawei.niu(a)intel.com>
> Date: Monday, October 26, 2020 at 12:09 AM
> To: Storage Performance Development Kit <spdk(a)lists.01.org>
> Subject: [SPDK] How to get transport ID from spdk_bdev
> Hi,
>
> Is there any way to get transport ID (and ns id) of an existing spdk_bdev?
> I think that could be useful for the applications built upon bdev layer and
> want to know the transport ID and namespace ID where the bdev is located,
> but I failed to find such kind of exported interfaces.
> I’m wondering if this controller information is deliberately being hidden
> behind bdev layer? In our use case, we just want to get the association of
> bdev and ctrlr/ns for configuration management purpose.
>
> Thanks
> -Niu
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