[PATCH v1 0/3] nvmet-rdma automatic port re-activation

[hch@lst.de (Christoph Hellwig)]

On Thu, Apr 12, 2018@11:06:52AM +0300, Sagi Grimberg wrote:
> When a RDMA device goes away we must destroy all it's associated
> RDMA resources. RDMa device resets also manifest as device removal
> events and a short while after they come back. We want to re-activate
> a port listener on this RDMA device when it comes back in to the system.

I really detest this series.  It just shows how messed up the whole
IB core interaction is.  The right way to fix this is to stop treating
a IB device reset as a device removal, and give it a different event.

And also make sure we have a single unified event system instead of
three separate ones.

> 
> In order to make it happen, we save the RDMA device node_guid on a
> ULP listener representation (nvmet_rdma_port) and when a RDMA device
> comes into the system, we check if there is a listener port that needs
> to be re-activated.
> 
> In addition, reflect the port state to the sysadmin nicely with a patch
> to nvmetcli.
> 
> Changes from v0 (rfc):
> - renamed tractive to trstate
> - trstate configfs file without addr_ prefix to prevent json serialization on it
> - nvmet_rdma_port_enable_work self requeue delay was increased to 5 seconds
> 
> Israel Rukshin (2):
>   nvmet: Add fabrics ops to port
>   nvmet: Add port transport state flag
> 
> Sagi Grimberg (1):
>   nvmet-rdma: automatic listening port re-activation
> 
>  drivers/nvme/target/configfs.c |  11 ++
>  drivers/nvme/target/core.c     |  17 ++-
>  drivers/nvme/target/nvmet.h    |   3 +
>  drivers/nvme/target/rdma.c     | 237 ++++++++++++++++++++++++++---------------
>  4 files changed, 175 insertions(+), 93 deletions(-)
> 
> -- 
> 2.14.1
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