Re: [PATCH v8 00/23] IB/Verbs: IB Management Helpers

From: ira.weiny
Date: Mon May 11 2015 - 19:49:24 EST

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I have run with this series and the only issue I have found is not with this
patch set directly.

This patch:

> IB/Verbs: Use management helper rdma_cap_ib_mad()

causes an error when you actually use the port passed from the ib_umad module.
I have a patch to fix that which I found while trying to build on this series
for the use of a bit mask.

Doug, I don't know what you would like to do for this fix. I am submitting it
shortly with a new version of the core capability bit patches. If you want to
just add it after this series or force Michael to respin with the fix? Frankly
I vote for the former because as it stands this series does not break directly.
It was only after I changed the implementation of rdma_cap_ib_mad that it
broke.

For the rest of the series.

Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Tested-by: Ira Weiny <ira.weiny@xxxxxxxxx>
-- Limited to mlx4, qib, and OPA (with additional patches.)

On Tue, May 05, 2015 at 02:50:17PM +0200, Michael Wang wrote:
> Since v7:
> * Thanks to Doug, Ira, Devesh for the testing :-)
> * Thanks for the comments from or, Doug, Ira, Jason :-)
> Please remind me if anything missed :-P
> * Use rdma_cap_XX() instead of cap_XX() for readability
> * Remove CC list in git log for maintainability
> * Use bool as return value
> * Updated github repository to v8
>
> There are plenty of lengthy code to check the transport type of IB device,
> or the link layer type of it's port, but actually we are just speculating
> whether a particular management/feature is supported by the device/port.
>
> Thus instead of inferring, we should have our own mechanism for IB management
> capability/protocol/feature checking, several proposals below.
>
> This patch set will introduce query_protocol() to check management requirement
> instead of inferring from transport and link layer respectively, along with
> the new enum on protocol type.
>
> Mapping List:
> node-type link-layer transport protocol
> nes RNIC ETH IWARP IWARP
> amso1100 RNIC ETH IWARP IWARP
> cxgb3 RNIC ETH IWARP IWARP
> cxgb4 RNIC ETH IWARP IWARP
> usnic USNIC_UDP ETH USNIC_UDP USNIC_UDP
> ocrdma IB_CA ETH IB IBOE
> mlx4 IB_CA IB/ETH IB IB/IBOE
> mlx5 IB_CA IB IB IB
> ehca IB_CA IB IB IB
> ipath IB_CA IB IB IB
> mthca IB_CA IB IB IB
> qib IB_CA IB IB IB
>
> For example:
> if (transport == IB) && (link-layer == ETH)
> will now become:
> if (query_protocol() == IBOE)
>
> Thus we will be able to get rid of the respective transport and link-layer
> checking, and it will help us to add new protocol/Technology (like OPA) more
> easier, also with the introduced management helpers, IB management logical
> will be more clear and easier for extending.
>
> Highlights:
> The long CC list in each patches was complained consider about the
> maintainability, it was suggested folks to provide their reviewed-by or
> Acked-by instead, so for those who used to be on the CC list, please
> provide your signature voluntarily :-)
>
> The 'mgmt-helpers' branch of 'git@xxxxxxxxxx:ywang-pb/infiniband-wy.git'
> contain this series based on the latest 'infiniband/for-next'
>
> Patch 1#~14# included all the logical reform, 15#~23# introduced the
> management helpers.
>
> Doug suggested the bitmask mechanism:
> https://www.mail-archive.com/linux-rdma@xxxxxxxxxxxxxxx/msg23765.html
> which could be the plan for future reforming, we prefer that to be another
> series which focus on semantic and performance.
>
> This patch-set is somewhat 'bloated' now and it may be a good timing for
> staging, I'd like to suggest we focus on improving existed helpers and push
> all the further reforms into next series ;-)
>
> Proposals:
> Sean:
> https://www.mail-archive.com/linux-rdma@xxxxxxxxxxxxxxx/msg23339.html
> Doug:
> https://www.mail-archive.com/linux-rdma@xxxxxxxxxxxxxxx/msg23418.html
> https://www.mail-archive.com/linux-rdma@xxxxxxxxxxxxxxx/msg23765.html
> Jason:
> https://www.mail-archive.com/linux-rdma@xxxxxxxxxxxxxxx/msg23425.html
>
> Michael Wang (23):
> IB/Verbs: Implement new callback query_protocol()
> IB/Verbs: Implement raw management helpers
> IB/Verbs: Reform IB-core mad/agent/user_mad
> IB/Verbs: Reform IB-core cm
> IB/Verbs: Reform IB-core sa_query
> IB/Verbs: Reform IB-core multicast
> IB/Verbs: Reform IB-ulp ipoib
> IB/Verbs: Reform IB-ulp xprtrdma
> IB/Verbs: Reform IB-core verbs
> IB/Verbs: Reform cm related part in IB-core cma/ucm
> IB/Verbs: Reform route related part in IB-core cma
> IB/Verbs: Reform mcast related part in IB-core cma
> IB/Verbs: Reform cma_acquire_dev()
> IB/Verbs: Reform rest part in IB-core cma
> IB/Verbs: Use management helper rdma_cap_ib_mad()
> IB/Verbs: Use management helper rdma_cap_ib_smi()
> IB/Verbs: Use management helper rdma_cap_ib_cm()
> IB/Verbs: Use management helper rdma_cap_iw_cm()
> IB/Verbs: Use management helper rdma_cap_ib_sa()
> IB/Verbs: Use management helper rdma_cap_ib_mcast()
> IB/Verbs: Use management helper rdma_cap_read_multi_sge()
> IB/Verbs: Use management helper rdma_cap_af_ib()
> IB/Verbs: Use management helper rdma_cap_eth_ah()
>
> drivers/infiniband/core/agent.c | 2 +-
> drivers/infiniband/core/cm.c | 20 ++-
> drivers/infiniband/core/cma.c | 257 +++++++++++----------------
> drivers/infiniband/core/device.c | 1 +
> drivers/infiniband/core/mad.c | 43 +++--
> drivers/infiniband/core/multicast.c | 12 +-
> drivers/infiniband/core/sa_query.c | 30 ++--
> drivers/infiniband/core/ucm.c | 3 +-
> drivers/infiniband/core/ucma.c | 25 +--
> drivers/infiniband/core/user_mad.c | 26 ++-
> drivers/infiniband/core/verbs.c | 6 +-
> drivers/infiniband/hw/amso1100/c2_provider.c | 7 +
> drivers/infiniband/hw/cxgb3/iwch_provider.c | 7 +
> drivers/infiniband/hw/cxgb4/provider.c | 7 +
> drivers/infiniband/hw/ehca/ehca_hca.c | 6 +
> drivers/infiniband/hw/ehca/ehca_iverbs.h | 3 +
> drivers/infiniband/hw/ehca/ehca_main.c | 1 +
> drivers/infiniband/hw/ipath/ipath_verbs.c | 7 +
> drivers/infiniband/hw/mlx4/main.c | 10 ++
> drivers/infiniband/hw/mlx5/main.c | 7 +
> drivers/infiniband/hw/mthca/mthca_provider.c | 7 +
> drivers/infiniband/hw/nes/nes_verbs.c | 6 +
> drivers/infiniband/hw/ocrdma/ocrdma_main.c | 1 +
> drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 6 +
> drivers/infiniband/hw/ocrdma/ocrdma_verbs.h | 3 +
> drivers/infiniband/hw/qib/qib_verbs.c | 7 +
> drivers/infiniband/hw/usnic/usnic_ib_main.c | 1 +
> drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 6 +
> drivers/infiniband/hw/usnic/usnic_ib_verbs.h | 2 +
> drivers/infiniband/ulp/ipoib/ipoib_main.c | 15 +-
> include/rdma/ib_verbs.h | 167 +++++++++++++++++
> net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 4 +-
> net/sunrpc/xprtrdma/svc_rdma_transport.c | 45 ++---
> 33 files changed, 477 insertions(+), 273 deletions(-)
>
> --
> 2.1.0
>
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Next message: Daniel Phillips: "Re: xfs: does mkfs.xfs require fancy switches to get decent performance? (was Tux3 Report: How fast can we fsync?)"
Previous message: Al Viro: "Re: [PATCH v3 105/110] namei: make unlazy_walk and terminate_walk handle nd->stack, add unlazy_link"
In reply to: Devesh Sharma: "Re: [PATCH v8 00/23] IB/Verbs: IB Management Helpers"
Next in thread: Doug Ledford: "Re: [PATCH v8 00/23] IB/Verbs: IB Management Helpers"
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