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Subject[Patch v2 00/19] CIFS: Implement SMBDirect
From: Long Li <>

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] (

The patch v2 added RDMA read/write via memory registration, and addressed feedbacks on v1.

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: Read data from SMBDirect
CIFS: SMBD: Send data through SMBDirect
CIFS: SMBD: Define memory registration for I/O data
CIFS: SMBD: Use registered memory RDMA read for SMB write
CIFS: SMBD: Deregister memory when finishing SMB write
CIFS: SMBD: Add parameter rdata to smb2_new_read_req
CIFS: SMBD: Read correct returned data length for RDMA write (SMB
CIFS: SMBD: Do not read from transport on registered memory RDMA write
CIFS: SMBD: Deregister memory when finishing SMB read
CIFS: SMBD: Add SMBDirect debug counters

fs/cifs/Makefile | 2 +-
fs/cifs/cifs_debug.c | 48 ++
fs/cifs/cifsfs.c | 2 +
fs/cifs/cifsglob.h | 17 +-
fs/cifs/cifssmb.c | 4 +-
fs/cifs/connect.c | 62 +-
fs/cifs/file.c | 5 +
fs/cifs/smb1ops.c | 2 +-
fs/cifs/smb2ops.c | 21 +-
fs/cifs/smb2pdu.c | 114 ++-
fs/cifs/smb2pdu.h | 2 +-
fs/cifs/smbdirect.c | 2328 ++++++++++++++++++++++++++++++++++++++++++++++++++
fs/cifs/smbdirect.h | 300 +++++++
fs/cifs/transport.c | 7 +
14 files changed, 2895 insertions(+), 19 deletions(-)
create mode 100644 fs/cifs/smbdirect.c
create mode 100644 fs/cifs/smbdirect.h


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