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). Change log: v2: Implemented RDMA read/write via memory registration. Re-arranged patches for review [Christoph Hellwig <hch@xxxxxxxxxxxxx>]. Restructured the code and fixed bugs on protocol timer and keepalive [Tom Talpey <ttalpey@xxxxxxxxxxxxx>]. v3: Improved performance by introducing an additional queue for handling empty packets and reducing lock contention on IRQ path. Added light weight profiling by reading TSC. Improved the code for checking SMB versions when mounting with rdma option [Leon Romanovsky <leon@xxxxxxxxxx>]. Moved to use pages instead of buffers for passing I/O for RDMA [Christoph Hellwig <hch@xxxxxxxxxxxxx>]. Removed redundant code and refactored I/O code paths [Christoph Hellwig <hch@xxxxxxxxxxxxx>, Tom Talpey <ttalpey@xxxxxxxxxxxxx>]. v4: Fixed connectivity issues with iWAPR devices. Exported configurable protocol parameters to /proc/fs/cifs [Steve French <sfrench@xxxxxxxxx>] Re-arranged patches for review [Pavel Shilovsky <piastryyy@xxxxxxxxx>]. v5: Fixed compiling errors on ia64, i386 and when INFINIBAND is not configured. [kbuild test robot] Profiling is removed and will be introduced in a seperate patch. v6: Report internal code error via WARN_ON(). Change description in Kconfig [Pavel Shilovsky <piastryyy@xxxxxxxxx>]. v7: Removed the use of #ifdef CONFIG_CIFS_SMB_DIRECT in upper layer code calling transport I/O. [Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>, Tom Talpey <ttalpey@xxxxxxxxxxxxx>] 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 | 21 +- fs/cifs/cifssmb.c | 15 +- fs/cifs/connect.c | 53 +- fs/cifs/file.c | 17 +- fs/cifs/smb1ops.c | 4 +- fs/cifs/smb2ops.c | 24 +- fs/cifs/smb2pdu.c | 127 ++- fs/cifs/smbdirect.c | 2617 ++++++++++++++++++++++++++++++++++++++++++++++++++ fs/cifs/smbdirect.h | 330 +++++++ fs/cifs/transport.c | 8 +- 14 files changed, 3344 insertions(+), 31 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
