Re: [PATCH rdma-next v3 0/6] Add Enhanced Connection Established (ECE)

From: Jason Gunthorpe
Date: Wed May 27 2020 - 15:14:29 EST

On Tue, May 26, 2020 at 01:32:58PM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> Changelog:
> v3:
> * Rebased on top of ebd6e96b33a2 RDMA/ipoib: Remove can_sleep parameter from iboib_mcast_alloc
> * Updated rdma_reject patch to include newly added RTR ulp
> * Remove empty hunks added by rebase
> * Changed signature of rdma_reject so kernel users will provide reason by themselves
> * Squashed UAPI patch to other patches which add functionality
> * Removed define of the IBTA reason from UAPI
> v2:
> * Rebased on latest rdma-next and removed already accepted patches.
> * Updated all rdma_reject in-kernel users to provide reject reason.
> v1: Dropped field_avail patch in favor of mass conversion to use function
> which already exists in the kernel code.
> v0:
> Enhanced Connection Established or ECE is new negotiation scheme
> introduced in IBTA v1.4 to exchange extra information about nodes
> capabilities and later negotiate them at the connection establishment
> phase.
> The RDMA-CM messages (REQ, REP, SIDR_REQ and SIDR_REP) were extended
> to carry two fields, one new and another gained new functionality:
> * VendorID is a new field that indicates that common subset of vendor
> option bits are supported as indicated by that VendorID.
> * AttributeModifier already exists, but overloaded to indicate which
> vendor options are supported by this VendorID.
> This is kernel part of such functionality which is responsible to get data
> from librdmacm and properly create and handle RDMA-CM messages.
> Thanks
> Leon Romanovsky (6):
> RDMA/cm: Add Enhanced Connection Establishment (ECE) bits
> RDMA/ucma: Extend ucma_connect to receive ECE parameters
> RDMA/ucma: Deliver ECE parameters through UCMA events
> RDMA/cm: Send and receive ECE parameter over the wire
> RDMA/cma: Connect ECE to rdma_accept
> RDMA/cma: Provide ECE reject reason

Applied to for-next, thanks