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SubjectRE: [Patch v3 00/19] CIFS: Implement SMB Direct
Date
> -----Original Message-----
> From: Long Li [mailto:longli@exchange.microsoft.com]
> Sent: Tuesday, August 29, 2017 12:29 PM
> To: Steve French <sfrench@samba.org>; linux-cifs@vger.kernel.org; samba-
> technical@lists.samba.org; linux-kernel@vger.kernel.org; linux-
> rdma@vger.kernel.org; Christoph Hellwig <hch@infradead.org>; Tom Talpey
> <ttalpey@microsoft.com>; Matthew Wilcox <mawilcox@microsoft.com>
> Cc: Long Li <longli@microsoft.com>
> Subject: [Patch v3 00/19] CIFS: Implement SMB Direct
>
> From: Long Li <longli@microsoft.com>
>
> Starting with SMB2 dialect 3.0, Microsoft introduced SMBDirect transport
> protocol for transferring upper layer (SMB2) payload over RDMA via
> Infiniband, RoCE or iWARP. The prococol is published in [MS-SMBD]
> (https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmsdn
> .microsoft.com%2Fen-
> us%2Flibrary%2Fhh536346.aspx&data=02%7C01%7Clongli%40microsoft.com
> %7C73e721d48ac0402f414208d4ef1470f2%7C72f988bf86f141af91ab2d7cd011
> db47%7C1%7C0%7C636396318489728526&sdata=3ES4XY3qXqUVEJ37YUHlMJ
> QWuxFeljzOEMhGXhmO2i0%3D&reserved=0).
>
> Patch v2 added RDMA read/write via memory registration, and addressed
> feedbacks on v1.
>
> Patch v3 improved performance by introducing an additional queue for
> handling empty packets and reducing lock contention on IRQ path. Also
> added light weight profiling by reading TSC and addressed feedbacks on v2.

I received some requests about testing the patch. Thank you for help testing.

A snapshot of the development kernel with the patch set is at:
https://github.com/longlimsft/linux-next/tree/patch_v3

During development, it is tested on Infiniband with Mellanox ConnectX-3.

>
> Long Li (19):
> CIFS: Add rdma mount option
> CIFS: SMBD: Add SMBDirect protocol and transport constants
> CIFS: SMBD: Implement SMBDirect transport
> CIFS: SMBD: Add SMBDirect transport to SMB connection and Makefile
> CIFS: SMBD: Connect to SMBDirect session
> CIFS: SMBD: Reconnect to SMBDirect session
> CIFS: SMBD: Destroy SMBDirect session on shutdown or umount
> CIFS: SMBD: Set SMBDirect maximum read or write size for I/O
> CIFS: SMBD: Receive data from SMBDirect
> CIFS: SMBD: Send data through SMBDirect
> CIFS: SMBD: Define memory registration for I/O data
> CIFS: SMBD: Fix the definition for SMB2_CHANNEL_RDMA_V1_INVALIDATE
> CIFS: SMBD: Implement SMB write via RDMA read through memory
> registration
> CIFS: SMBD: Deregister memory on finishing SMB write
> CIFS: SMBD: Add parameter rdata to smb2_new_read_req
> CIFS: SMBD: Read correct returned data length for RDMA write (SMB
> read) I/O
> CIFS: SMBD: Implement SMB read via RDMA write through memory
> registration
> CIFS: SMBD: Deregister memory when finishing SMB read
> CIFS: SMBD: Add SMBDirect debug counters
>
> fs/cifs/Makefile | 2 +-
> fs/cifs/cifs_debug.c | 84 ++
> fs/cifs/cifsfs.c | 2 +
> fs/cifs/cifsglob.h | 17 +-
> fs/cifs/cifssmb.c | 10 +-
> fs/cifs/connect.c | 46 +-
> fs/cifs/file.c | 10 +
> fs/cifs/smb1ops.c | 2 +-
> fs/cifs/smb2ops.c | 21 +-
> fs/cifs/smb2pdu.c | 114 ++-
> fs/cifs/smb2pdu.h | 2 +-
> fs/cifs/smbdirect.c | 2639
> ++++++++++++++++++++++++++++++++++++++++++++++++++
> fs/cifs/smbdirect.h | 324 +++++++
> fs/cifs/transport.c | 7 +
> 14 files changed, 3260 insertions(+), 20 deletions(-) create mode 100644
> fs/cifs/smbdirect.c create mode 100644 fs/cifs/smbdirect.h
>
> --
> 2.7.4

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