From mboxrd@z Thu Jan  1 00:00:00 1970
From: aeasi@marvell.com (Arun Easi)
Date: Wed, 29 May 2019 16:12:08 -0700
Subject: [PATCH v2 0/7] nvmet/nvmet_fc: add events for discovery controller
 rescan
In-Reply-To: <20190514215808.10572-1-jsmart2021@gmail.com>
References: <20190514215808.10572-1-jsmart2021@gmail.com>
Message-ID: <alpine.LRH.2.21.9999.1905291609220.19585@mvluser05.qlc.com>

Apologies for the delay, wanted to test out some of these changes, but 
it looks it would be a bit longer.

Anyway, the series look good to me.

-- arun

On Tue, 14 May 2019, 2:58pm, James Smart wrote:

> A transport may have a transport-specific mechanism that can signal
> when discovery controller content has changed and request a host
> to rescan to the discovery controller.
> 
> FC is such a transport. RSCNs may be generated by the subsystem's FC
> port and sent to the initiator or fabric controller. If a fabric, the
> fabric controller will broadcast the RSCN to registered hosts. A host,
> upon receiving the RSCN, would validate connectivity then initiate a
> discovery controller rescan.
> 
> These patches:
> - Modify the nvmet core layer to call a transport callback whenever
>   a port discovery change occurs.  To facilitate the callback and
>   avoid new routines between core. and discovery.c the port structure
>   now has a copy of the transport ops structure.
> - Modify the nvmet-fc transport to support the nvmet callback, and add
>   its own internal lldd api to request the lldd to generate an RSCN.
> - Update nvme-fcloop test harness to support the lldd api and invoke
>   the rescan on the host.
> - Modify the lpfc driver to support the new interfaces:
>   - Adds a new routine to transmit an RSCN to the other port (pt2pt)
>     or fabric controller.  Add recognition for receipt of an RSCN.
>   - Add support for the nvmet lldd api for discovery event, which
>     invokes the RSCN transmit.
>   - Ties into the RSCN receipt and requests the nvme_fc transport
>     to rescan the remote port (discovery event will be posted).
>   - Adds a sysfs routine to enable manual generation of an RSCN.
> 
> v2:
> Revise lpfc patch 6 to check for port role nvme discovery not just
>   nvme target
> 
> 
> James Smart (7):
>   nvmet: add transport discovery change op
>   nvmet_fc: add transport discovery change event callback support
>   nvme-fcloop: Add support for nvmet discovery_event op
>   lpfc: Add support to generate RSCN events for nport
>   lpfc: add nvmet discovery_event op support
>   lpfc: Add support for translating an RSCN rcv into a discovery rescan
>   lpfc: Add sysfs interface to post NVME RSCN
> 
>  drivers/nvme/target/core.c       |   2 +
>  drivers/nvme/target/discovery.c  |   4 ++
>  drivers/nvme/target/fc.c         |  11 ++++
>  drivers/nvme/target/fcloop.c     |  37 ++++++++++++
>  drivers/nvme/target/nvmet.h      |   2 +
>  drivers/scsi/lpfc/lpfc.h         |   2 +
>  drivers/scsi/lpfc/lpfc_attr.c    |  60 ++++++++++++++++++
>  drivers/scsi/lpfc/lpfc_crtn.h    |   4 ++
>  drivers/scsi/lpfc/lpfc_els.c     | 127 +++++++++++++++++++++++++++++++++++++++
>  drivers/scsi/lpfc/lpfc_hbadisc.c |  35 +++++++++++
>  drivers/scsi/lpfc/lpfc_hw.h      |   2 +
>  drivers/scsi/lpfc/lpfc_nvme.c    |  44 ++++++++++++++
>  drivers/scsi/lpfc/lpfc_nvmet.c   |  17 ++++++
>  drivers/scsi/lpfc/lpfc_sli.c     |   1 +
>  include/linux/nvme-fc-driver.h   |   6 ++
>  15 files changed, 354 insertions(+)
> 
>