From: Long Li <longli@xxxxxxxxxxxxx> 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://msdn.microsoft.com/en-us/library/hh536346.aspx). 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. 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 -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
