Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1722761

[Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport constants

From Long Li <longli@exchange.microsoft.com>
Newsgroups linux.kernel
Subject [Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport constants
Date 2017-08-29 21:40 +0200
Message-ID <ujUwI-6Me-67@gated-at.bofh.it> (permalink)
References <ujUwF-6Me-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

From: Long Li <longli@microsoft.com>

To prepare for protocol implementation, add constants and user-configurable
values in the SMBDirect protocol.

Signed-off-by: Long Li <longli@microsoft.com>
---
 fs/cifs/smbdirect.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 fs/cifs/smbdirect.h | 20 ++++++++++++++
 2 files changed, 98 insertions(+)
 create mode 100644 fs/cifs/smbdirect.c
 create mode 100644 fs/cifs/smbdirect.h

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
new file mode 100644
index 0000000..d785bc1
--- /dev/null
+++ b/fs/cifs/smbdirect.c
@@ -0,0 +1,78 @@
+/*
+ *   Copyright (C) 2017, Microsoft Corporation.
+ *
+ *   Author(s): Long Li <longli@microsoft.com>
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ */
+#include <linux/module.h>
+#include "smbdirect.h"
+#include "cifs_debug.h"
+
+/* SMBD version number */
+#define SMBD_V1	0x0100
+
+/* Port numbers for SMBD transport */
+#define SMB_PORT	445
+#define SMBD_PORT	5445
+
+/* Address lookup and resolve timeout in ms */
+#define RDMA_RESOLVE_TIMEOUT	5000
+
+/* SMBD negotiation timeout in seconds */
+#define SMBD_NEGOTIATE_TIMEOUT	120
+
+/* SMBD minimum receive size and fragmented sized defined in [MS-SMBD] */
+#define SMBD_MIN_RECEIVE_SIZE		128
+#define SMBD_MIN_FRAGMENTED_SIZE	131072
+
+/*
+ * Default maximum number of RDMA read/write outstanding on this connection
+ * This value is possibly decreased during QP creation on hardware limit
+ */
+#define SMBD_CM_RESPONDER_RESOURCES	32
+
+/* Maximum number of retries on data transfer operations */
+#define SMBD_CM_RETRY			6
+/* No need to retry on Receiver Not Ready since SMBD manages credits */
+#define SMBD_CM_RNR_RETRY		0
+
+/*
+ * User configurable initial values per SMBD transport connection
+ * as defined in [MS-SMBD] 3.1.1.1
+ * Those may change after a SMBD negotiation
+ */
+/* The local peer's maximum number of credits to grant to the peer */
+static int receive_credit_max = 255;
+/* The remote peer's credit request of local peer */
+static int send_credit_target = 255;
+/* The maximum single message size can be sent to remote peer */
+static int max_send_size = 1364;
+/*  The maximum fragmented upper-layer payload receive size supported */
+static int max_fragmented_recv_size = 1024 * 1024;
+/*  The maximum single-message size which can be received */
+static int max_receive_size = 8192;
+
+/* The timeout to initiate send of a keepalive message on idle */
+static int keep_alive_interval = 120;
+
+/*
+ * User configurable initial values for RDMA transport
+ * The actual values used may be lower and are limited to hardware capabilities
+ */
+/* Default maximum number of SGEs in a RDMA send/recv */
+static int max_send_sge = SMBDIRECT_MAX_SGE;
+static int max_recv_sge = SMBDIRECT_MAX_SGE;
+/* Default maximum number of SGEs in a RDMA write/read */
+static int max_frmr_depth = 2048;
+
+/* If payload is less than this byte, use RDMA send/recv not read/write */
+static int rdma_readwrite_threshold = 4096;
diff --git a/fs/cifs/smbdirect.h b/fs/cifs/smbdirect.h
new file mode 100644
index 0000000..06eeb0b
--- /dev/null
+++ b/fs/cifs/smbdirect.h
@@ -0,0 +1,20 @@
+/*
+ *   Copyright (C) 2017, Microsoft Corporation.
+ *
+ *   Author(s): Long Li <longli@microsoft.com>
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ */
+#ifndef _SMBDIRECT_H
+#define _SMBDIRECT_H
+
+#define SMBDIRECT_MAX_SGE	16
+#endif
-- 
2.7.4

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[Patch v3 00/19] CIFS: Implement SMB Direct Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 07/19] CIFS: SMBD: Destroy SMBDirect session on shutdown or umount Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 04/19] CIFS: SMBD: Add SMBDirect transport to SMB connection and Makefile Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
    Re: [Patch v3 04/19] CIFS: SMBD: Add SMBDirect transport to SMB  connection and Makefile Pavel Shilovsky <piastryyy@gmail.com> - 2017-08-30 01:20 +0200
      RE: [Patch v3 04/19] CIFS: SMBD: Add SMBDirect transport to SMB  connection and Makefile Long Li <longli@microsoft.com> - 2017-08-30 01:20 +0200
  [Patch v3 09/19] CIFS: SMBD: Receive data from SMBDirect Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 01/19] CIFS: Add rdma mount option Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
    Re: [Patch v3 01/19] CIFS: Add rdma mount option Pavel Shilovsky <piastryyy@gmail.com> - 2017-08-30 00:40 +0200
      RE: [Patch v3 01/19] CIFS: Add rdma mount option Long Li <longli@microsoft.com> - 2017-08-30 01:00 +0200
  [Patch v3 11/19] CIFS: SMBD: Define memory registration for I/O data Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
    Re: [Patch v3 11/19] CIFS: SMBD: Define memory registration for I/O data Pavel Shilovsky <piastryyy@gmail.com> - 2017-08-30 02:50 +0200
      RE: [Patch v3 11/19] CIFS: SMBD: Define memory registration for I/O  data Long Li <longli@microsoft.com> - 2017-08-30 04:20 +0200
  [Patch v3 12/19] CIFS: SMBD: Fix the definition for SMB2_CHANNEL_RDMA_V1_INVALIDATE Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
    Re: [Patch v3 12/19] CIFS: SMBD: Fix the definition for SMB2_CHANNEL_RDMA_V1_INVALIDATE Pavel Shilovsky <piastryyy@gmail.com> - 2017-08-30 03:00 +0200
      RE: [Patch v3 12/19] CIFS: SMBD: Fix the definition for  SMB2_CHANNEL_RDMA_V1_INVALIDATE Long Li <longli@microsoft.com> - 2017-08-30 04:20 +0200
  [Patch v3 10/19] CIFS: SMBD: Send data through SMBDirect Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 19/19] CIFS: SMBD: Add SMBDirect debug counters Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 17/19] CIFS: SMBD: Implement SMB read via RDMA write through memory registration Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 14/19] CIFS: SMBD: Deregister memory on finishing SMB write Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 08/19] CIFS: SMBD: Set SMBDirect maximum read or write size for I/O Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 18/19] CIFS: SMBD: Deregister memory when finishing SMB read Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 06/19] CIFS: SMBD: Reconnect to SMBDirect session Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
    Re: [Patch v3 06/19] CIFS: SMBD: Reconnect to SMBDirect session Pavel Shilovsky <piastryyy@gmail.com> - 2017-08-30 01:30 +0200
      RE: [Patch v3 06/19] CIFS: SMBD: Reconnect to SMBDirect session Long Li <longli@microsoft.com> - 2017-08-30 01:40 +0200
  [Patch v3 15/19] CIFS: SMBD: Add parameter rdata to smb2_new_read_req Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 13/19] CIFS: SMBD: Implement SMB write via RDMA read through memory registration Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
  [Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport constants Long Li <longli@exchange.microsoft.com> - 2017-08-29 21:40 +0200
    Re: [Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport constants Pavel Shilovsky <piastryyy@gmail.com> - 2017-08-30 00:50 +0200
      RE: [Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport  constants Long Li <longli@microsoft.com> - 2017-08-30 01:10 +0200
        Re: [Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport constants Pavel Shilovsky <piastryyy@gmail.com> - 2017-08-30 20:20 +0200
          RE: [Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport  constants Long Li <longli@microsoft.com> - 2017-08-30 20:30 +0200
            Re: [Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport constants Pavel Shilovsky <piastryyy@gmail.com> - 2017-08-30 20:40 +0200
              Re: [Patch v3 02/19] CIFS: SMBD: Add SMBDirect protocol and transport constants Steve French <smfrench@gmail.com> - 2017-09-01 17:50 +0200
  RE: [Patch v3 00/19] CIFS: Implement SMB Direct Long Li <longli@microsoft.com> - 2017-08-30 20:50 +0200

csiph-web