From: Long Li <longli@xxxxxxxxxxxxx> Starting with SMB2 dialect 3.0, Microsoft introduced SMB Direct 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. Patch v4 fixed connectivity issues with iWAPR devices and addressed comments. Patch v5 fixed compiling errors on ia64, i386 and when INFINIBAND is not configured, and addressed comments. Profiling is removed and will be introduced in a seperate patch. Patch v6 addressed comments. Long Li (22): CIFS: SMBD: Add parameter rdata to smb2_new_read_req CIFS: SMBD: Introduce kernel config option CONFIG_CIFS_SMB_DIRECT CIFS: SMBD: Add rdma mount option CIFS: SMBD: Add SMB Direct protocol initial values and constants CIFS: SMBD: Establish SMB Direct connection CIFS: SMBD: export protocol initial values CIFS: SMBD: Implement function to create a SMB Direct connection CIFS: SMBD: Upper layer connects to SMBDirect session CIFS: SMBD: Implement function to reconnect to a SMB Direct transport CIFS: SMBD: Upper layer reconnects to SMB Direct session CIFS: SMBD: Implement function to destroy a SMB Direct connection CIFS: SMBD: Upper layer destroys SMB Direct session on shutdown or umount CIFS: SMBD: Set SMB Direct maximum read or write size for I/O CIFS: SMBD: Implement function to receive data via RDMA receive CIFS: SMBD: Upper layer receives data via RDMA receive CIFS: SMBD: Implement function to send data via RDMA send CIFS: SMBD: Upper layer sends data via RDMA send CIFS: SMBD: Implement RDMA memory registration CIFS: SMBD: Upper layer performs SMB write via RDMA read through memory registration CIFS: SMBD: Read correct returned data length for RDMA write (SMB read) I/O CIFS: SMBD: Upper layer performs SMB read via RDMA write through memory registration CIFS: SMBD: Add SMB Direct debug counters fs/cifs/Kconfig | 8 + fs/cifs/Makefile | 2 + fs/cifs/cifs_debug.c | 147 +++ fs/cifs/cifsfs.c | 2 + fs/cifs/cifsglob.h | 23 +- fs/cifs/cifssmb.c | 16 +- fs/cifs/connect.c | 64 +- fs/cifs/file.c | 19 +- fs/cifs/smb1ops.c | 4 +- fs/cifs/smb2ops.c | 26 +- fs/cifs/smb2pdu.c | 129 ++- fs/cifs/smbdirect.c | 2618 ++++++++++++++++++++++++++++++++++++++++++++++++++ fs/cifs/smbdirect.h | 315 ++++++ fs/cifs/transport.c | 14 +- 14 files changed, 3359 insertions(+), 28 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-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
