Re: [SPDK] NVMF initiator error: Failed to open /dev/nvme-fabrics: No such file or directory

* Re: [SPDK] NVMF initiator error: Failed to open /dev/nvme-fabrics: No such file or directory
@ 2017-08-21 16:45 Sunil Vettukalppurathu
  0 siblings, 0 replies; 5+ messages in thread
From: Sunil Vettukalppurathu @ 2017-08-21 16:45 UTC (permalink / raw)
  To: spdk

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Hi Gang,

Thanks for the suggestion.

It doesn't work in my case as it's using linux rdma instead of spdk rdma
where I am making some changes.

Error:

Failed to write to /dev/nvme-fabrics: Connection reset by peer

dmesg:

nvme nvme0: rdma_resolve_addr wait failed (-104).

The above message comes from linux rdma instead of spdk rdma.
Thanks,
--Sunil

On Sun, Aug 20, 2017 at 6:51 AM, Cao, Gang <gang.cao(a)intel.com> wrote:

> Hi Sunil,
>
>
>
> On the initiator side, you may run the “modprobe -v nvme-rdma” with root
> command first and will see the /dev/nvme-fabrics device there. After
> this, run the connect command from the SPDK version nvme-cli. Also to
> support more parameters from the connect command like hostnqn, you may pull
> the https://review.gerrithub.io/#/c/372395/ patch which is under
> reviewing now. Once the device is connected, you can see /dev/nvmeX and
> /dev/nvmeXn1 two new devices there. Please kindly let us know whether this
> works.
>
>
>
> Thanks,
>
> Gang
>
>
>
> *From:* SPDK [mailto:spdk-bounces(a)lists.01.org] *On Behalf Of *Sunil
> Vettukalppurathu
> *Sent:* Saturday, August 19, 2017 1:42 AM
> *To:* Storage Performance Development Kit <spdk(a)lists.01.org>
> *Subject:* Re: [SPDK] NVMF initiator error: Failed to open
> /dev/nvme-fabrics: No such file or directory
>
>
>
>
>
> Hi Daniel,
>
>
>
> Appreciate the quick response.
>
>
>
> command:
>
>
>
> ./nvme connect -t rdma -n testnqn -a 192.168.56.1 -s 4420
>
> This is spdk verion of nvme-cli.
>
> I tried 'identify' as you suggested and it's working fine.
>
> What  am trying to achieve is to get  a namespace created which can be
> mounted and used (like /dev/nvme0n1).
>
> May be it's not possible with spdk, I guess. Looks like once the 'attach'
> is done, I will have to do all operations, then detach and come out  -
> meaning the attach of a controller is not persistent once the program
> exits.
>
> Thanks,
>
> --Sunil
>
>
>
>
>
>
>
>
>
> On Fri, Aug 18, 2017 at 9:18 AM, Verkamp, Daniel <daniel.verkamp(a)intel.com>
> wrote:
>
> Hi Sunil,
>
>
>
> Can you describe which commands you are running on the initiator side?
>
>
>
> /dev/nvme-fabrics is exposed by the Linux kernel NMVe-oF initiator; if you
> are using the SPDK initiator, it should not be needed.
>
>
>
> As an example, you should be able to use the SPDK NVMe-oF initiator
> through the NVMe identify example (fill in your own target IP address and
> port number):
>
>
>
>     examples/nvme/identify/identify -r ‘trtype:RDMA traddr:1.2.3.4
> adrfam:IPv4 trsvcid:4420 subnqn:nqn.2014-08.org.nvmexpress.discovery’
>
>
>
> Thanks,
>
> -- Daniel
>
>
>
> *From:* SPDK [mailto:spdk-bounces(a)lists.01.org] *On Behalf Of *Sunil
> Vettukalppurathu
> *Sent:* Thursday, August 17, 2017 3:27 PM
> *To:* spdk(a)lists.01.org
> *Subject:* [SPDK] NVMF initiator error: Failed to open /dev/nvme-fabrics:
> No such file or directory
>
>
>
> Hi,
>
>
>
> I am  trying to run initiator on machine and the target on another machine
>   using rdma.
>
>
>
> Once the controller is initialized (qpairs are created), it fails in
> add_ctrl() saying:
>
>
>
> *Failed to open /dev/nvme-fabrics: No such file or directory*
>
>
>
> Who should be creating this file: /dev/nvme-fabrics ?
>
>
>
> Looking at code, nowhere it's created - at least I can not see it.
>
>
>
> If I load linux nvme_fabrics module,  /dev/nvme-fabrics is created. But
> then it would be taking the linux route.... right?
>
>
>
> Thanks for the help. Appreciate it.
>
>
>
> --sunil
>
>
>
>
>
>
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