![Chuck Lever](/assets/img/avatar_default.png)
Reflect the more conservative approach used in the socket transport's version of this transport method. An RPC buffer allocation should avoid forcing not just FS activity, but any I/O. In particular, two recent changes missed updating xprtrdma: - Commitc6c8fe79a8
("net, sunrpc: suppress allocation warning ...") - Commita564b8f039
("nfs: enable swap on NFS") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
730 lines
20 KiB
C
730 lines
20 KiB
C
/*
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* Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the BSD-type
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Network Appliance, Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* transport.c
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*
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* This file contains the top-level implementation of an RPC RDMA
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* transport.
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*
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* Naming convention: functions beginning with xprt_ are part of the
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* transport switch. All others are RPC RDMA internal.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/seq_file.h>
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#include <linux/sunrpc/addr.h>
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#include "xprt_rdma.h"
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#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
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# define RPCDBG_FACILITY RPCDBG_TRANS
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#endif
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION("RPC/RDMA Transport for Linux kernel NFS");
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MODULE_AUTHOR("Network Appliance, Inc.");
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/*
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* tunables
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*/
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static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE;
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static unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
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static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
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static unsigned int xprt_rdma_inline_write_padding;
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static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR;
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int xprt_rdma_pad_optimize = 1;
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#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
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static unsigned int min_slot_table_size = RPCRDMA_MIN_SLOT_TABLE;
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static unsigned int max_slot_table_size = RPCRDMA_MAX_SLOT_TABLE;
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static unsigned int zero;
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static unsigned int max_padding = PAGE_SIZE;
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static unsigned int min_memreg = RPCRDMA_BOUNCEBUFFERS;
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static unsigned int max_memreg = RPCRDMA_LAST - 1;
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static struct ctl_table_header *sunrpc_table_header;
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static struct ctl_table xr_tunables_table[] = {
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{
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.procname = "rdma_slot_table_entries",
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.data = &xprt_rdma_slot_table_entries,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &min_slot_table_size,
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.extra2 = &max_slot_table_size
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},
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{
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.procname = "rdma_max_inline_read",
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.data = &xprt_rdma_max_inline_read,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "rdma_max_inline_write",
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.data = &xprt_rdma_max_inline_write,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "rdma_inline_write_padding",
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.data = &xprt_rdma_inline_write_padding,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &zero,
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.extra2 = &max_padding,
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},
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{
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.procname = "rdma_memreg_strategy",
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.data = &xprt_rdma_memreg_strategy,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &min_memreg,
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.extra2 = &max_memreg,
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},
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{
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.procname = "rdma_pad_optimize",
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.data = &xprt_rdma_pad_optimize,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{ },
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};
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static struct ctl_table sunrpc_table[] = {
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{
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.procname = "sunrpc",
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.mode = 0555,
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.child = xr_tunables_table
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},
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{ },
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};
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#endif
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#define RPCRDMA_BIND_TO (60U * HZ)
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#define RPCRDMA_INIT_REEST_TO (5U * HZ)
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#define RPCRDMA_MAX_REEST_TO (30U * HZ)
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#define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ)
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static struct rpc_xprt_ops xprt_rdma_procs; /* forward reference */
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static void
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xprt_rdma_format_addresses(struct rpc_xprt *xprt)
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{
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struct sockaddr *sap = (struct sockaddr *)
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&rpcx_to_rdmad(xprt).addr;
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struct sockaddr_in *sin = (struct sockaddr_in *)sap;
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char buf[64];
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(void)rpc_ntop(sap, buf, sizeof(buf));
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xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL);
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snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap));
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xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
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xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma";
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snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr));
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xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
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snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap));
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xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
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/* netid */
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xprt->address_strings[RPC_DISPLAY_NETID] = "rdma";
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}
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static void
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xprt_rdma_free_addresses(struct rpc_xprt *xprt)
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{
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unsigned int i;
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for (i = 0; i < RPC_DISPLAY_MAX; i++)
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switch (i) {
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case RPC_DISPLAY_PROTO:
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case RPC_DISPLAY_NETID:
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continue;
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default:
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kfree(xprt->address_strings[i]);
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}
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}
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static void
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xprt_rdma_connect_worker(struct work_struct *work)
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{
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struct rpcrdma_xprt *r_xprt = container_of(work, struct rpcrdma_xprt,
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rx_connect_worker.work);
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struct rpc_xprt *xprt = &r_xprt->rx_xprt;
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int rc = 0;
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xprt_clear_connected(xprt);
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dprintk("RPC: %s: %sconnect\n", __func__,
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r_xprt->rx_ep.rep_connected != 0 ? "re" : "");
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rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia);
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if (rc)
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xprt_wake_pending_tasks(xprt, rc);
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dprintk("RPC: %s: exit\n", __func__);
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xprt_clear_connecting(xprt);
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}
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/*
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* xprt_rdma_destroy
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*
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* Destroy the xprt.
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* Free all memory associated with the object, including its own.
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* NOTE: none of the *destroy methods free memory for their top-level
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* objects, even though they may have allocated it (they do free
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* private memory). It's up to the caller to handle it. In this
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* case (RDMA transport), all structure memory is inlined with the
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* struct rpcrdma_xprt.
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*/
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static void
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xprt_rdma_destroy(struct rpc_xprt *xprt)
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{
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struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
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dprintk("RPC: %s: called\n", __func__);
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cancel_delayed_work_sync(&r_xprt->rx_connect_worker);
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xprt_clear_connected(xprt);
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rpcrdma_buffer_destroy(&r_xprt->rx_buf);
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rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia);
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rpcrdma_ia_close(&r_xprt->rx_ia);
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xprt_rdma_free_addresses(xprt);
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xprt_free(xprt);
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dprintk("RPC: %s: returning\n", __func__);
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module_put(THIS_MODULE);
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}
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static const struct rpc_timeout xprt_rdma_default_timeout = {
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.to_initval = 60 * HZ,
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.to_maxval = 60 * HZ,
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};
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/**
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* xprt_setup_rdma - Set up transport to use RDMA
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*
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* @args: rpc transport arguments
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*/
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static struct rpc_xprt *
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xprt_setup_rdma(struct xprt_create *args)
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{
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struct rpcrdma_create_data_internal cdata;
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struct rpc_xprt *xprt;
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struct rpcrdma_xprt *new_xprt;
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struct rpcrdma_ep *new_ep;
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struct sockaddr_in *sin;
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int rc;
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if (args->addrlen > sizeof(xprt->addr)) {
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dprintk("RPC: %s: address too large\n", __func__);
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return ERR_PTR(-EBADF);
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}
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xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt),
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xprt_rdma_slot_table_entries,
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xprt_rdma_slot_table_entries);
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if (xprt == NULL) {
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dprintk("RPC: %s: couldn't allocate rpcrdma_xprt\n",
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__func__);
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return ERR_PTR(-ENOMEM);
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}
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/* 60 second timeout, no retries */
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xprt->timeout = &xprt_rdma_default_timeout;
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xprt->bind_timeout = RPCRDMA_BIND_TO;
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xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
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xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO;
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xprt->resvport = 0; /* privileged port not needed */
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xprt->tsh_size = 0; /* RPC-RDMA handles framing */
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xprt->ops = &xprt_rdma_procs;
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/*
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* Set up RDMA-specific connect data.
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*/
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/* Put server RDMA address in local cdata */
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memcpy(&cdata.addr, args->dstaddr, args->addrlen);
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/* Ensure xprt->addr holds valid server TCP (not RDMA)
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* address, for any side protocols which peek at it */
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xprt->prot = IPPROTO_TCP;
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xprt->addrlen = args->addrlen;
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memcpy(&xprt->addr, &cdata.addr, xprt->addrlen);
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sin = (struct sockaddr_in *)&cdata.addr;
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if (ntohs(sin->sin_port) != 0)
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xprt_set_bound(xprt);
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dprintk("RPC: %s: %pI4:%u\n",
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__func__, &sin->sin_addr.s_addr, ntohs(sin->sin_port));
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/* Set max requests */
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cdata.max_requests = xprt->max_reqs;
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/* Set some length limits */
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cdata.rsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA write max */
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cdata.wsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA read max */
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cdata.inline_wsize = xprt_rdma_max_inline_write;
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if (cdata.inline_wsize > cdata.wsize)
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cdata.inline_wsize = cdata.wsize;
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cdata.inline_rsize = xprt_rdma_max_inline_read;
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if (cdata.inline_rsize > cdata.rsize)
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cdata.inline_rsize = cdata.rsize;
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cdata.padding = xprt_rdma_inline_write_padding;
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/*
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* Create new transport instance, which includes initialized
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* o ia
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* o endpoint
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* o buffers
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*/
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new_xprt = rpcx_to_rdmax(xprt);
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rc = rpcrdma_ia_open(new_xprt, (struct sockaddr *) &cdata.addr,
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xprt_rdma_memreg_strategy);
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if (rc)
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goto out1;
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/*
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* initialize and create ep
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*/
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new_xprt->rx_data = cdata;
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new_ep = &new_xprt->rx_ep;
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new_ep->rep_remote_addr = cdata.addr;
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rc = rpcrdma_ep_create(&new_xprt->rx_ep,
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&new_xprt->rx_ia, &new_xprt->rx_data);
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if (rc)
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goto out2;
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/*
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* Allocate pre-registered send and receive buffers for headers and
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* any inline data. Also specify any padding which will be provided
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* from a preregistered zero buffer.
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*/
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rc = rpcrdma_buffer_create(new_xprt);
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if (rc)
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goto out3;
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/*
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* Register a callback for connection events. This is necessary because
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* connection loss notification is async. We also catch connection loss
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* when reaping receives.
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*/
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INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
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xprt_rdma_connect_worker);
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xprt_rdma_format_addresses(xprt);
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xprt->max_payload = rpcrdma_max_payload(new_xprt);
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dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
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__func__, xprt->max_payload);
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if (!try_module_get(THIS_MODULE))
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goto out4;
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return xprt;
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out4:
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xprt_rdma_free_addresses(xprt);
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rc = -EINVAL;
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out3:
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rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia);
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out2:
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rpcrdma_ia_close(&new_xprt->rx_ia);
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out1:
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xprt_free(xprt);
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return ERR_PTR(rc);
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}
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/*
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* Close a connection, during shutdown or timeout/reconnect
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*/
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static void
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xprt_rdma_close(struct rpc_xprt *xprt)
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{
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struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
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dprintk("RPC: %s: closing\n", __func__);
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if (r_xprt->rx_ep.rep_connected > 0)
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xprt->reestablish_timeout = 0;
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xprt_disconnect_done(xprt);
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rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia);
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}
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static void
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xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port)
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{
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struct sockaddr_in *sap;
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sap = (struct sockaddr_in *)&xprt->addr;
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sap->sin_port = htons(port);
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sap = (struct sockaddr_in *)&rpcx_to_rdmad(xprt).addr;
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sap->sin_port = htons(port);
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dprintk("RPC: %s: %u\n", __func__, port);
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}
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static void
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xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task)
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{
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struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
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if (r_xprt->rx_ep.rep_connected != 0) {
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/* Reconnect */
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schedule_delayed_work(&r_xprt->rx_connect_worker,
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xprt->reestablish_timeout);
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xprt->reestablish_timeout <<= 1;
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if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO)
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xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO;
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else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO)
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xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
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} else {
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schedule_delayed_work(&r_xprt->rx_connect_worker, 0);
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if (!RPC_IS_ASYNC(task))
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flush_delayed_work(&r_xprt->rx_connect_worker);
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}
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}
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/*
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* The RDMA allocate/free functions need the task structure as a place
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* to hide the struct rpcrdma_req, which is necessary for the actual send/recv
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* sequence.
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*
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* The RPC layer allocates both send and receive buffers in the same call
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* (rq_send_buf and rq_rcv_buf are both part of a single contiguous buffer).
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* We may register rq_rcv_buf when using reply chunks.
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*/
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static void *
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xprt_rdma_allocate(struct rpc_task *task, size_t size)
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{
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struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt;
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struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
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struct rpcrdma_regbuf *rb;
|
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struct rpcrdma_req *req;
|
|
size_t min_size;
|
|
gfp_t flags;
|
|
|
|
req = rpcrdma_buffer_get(&r_xprt->rx_buf);
|
|
if (req == NULL)
|
|
return NULL;
|
|
|
|
flags = GFP_NOIO | __GFP_NOWARN;
|
|
if (RPC_IS_SWAPPER(task))
|
|
flags = __GFP_MEMALLOC | GFP_NOWAIT | __GFP_NOWARN;
|
|
|
|
if (req->rl_rdmabuf == NULL)
|
|
goto out_rdmabuf;
|
|
if (req->rl_sendbuf == NULL)
|
|
goto out_sendbuf;
|
|
if (size > req->rl_sendbuf->rg_size)
|
|
goto out_sendbuf;
|
|
|
|
out:
|
|
dprintk("RPC: %s: size %zd, request 0x%p\n", __func__, size, req);
|
|
req->rl_connect_cookie = 0; /* our reserved value */
|
|
return req->rl_sendbuf->rg_base;
|
|
|
|
out_rdmabuf:
|
|
min_size = RPCRDMA_INLINE_WRITE_THRESHOLD(task->tk_rqstp);
|
|
rb = rpcrdma_alloc_regbuf(&r_xprt->rx_ia, min_size, flags);
|
|
if (IS_ERR(rb))
|
|
goto out_fail;
|
|
req->rl_rdmabuf = rb;
|
|
|
|
out_sendbuf:
|
|
/* XDR encoding and RPC/RDMA marshaling of this request has not
|
|
* yet occurred. Thus a lower bound is needed to prevent buffer
|
|
* overrun during marshaling.
|
|
*
|
|
* RPC/RDMA marshaling may choose to send payload bearing ops
|
|
* inline, if the result is smaller than the inline threshold.
|
|
* The value of the "size" argument accounts for header
|
|
* requirements but not for the payload in these cases.
|
|
*
|
|
* Likewise, allocate enough space to receive a reply up to the
|
|
* size of the inline threshold.
|
|
*
|
|
* It's unlikely that both the send header and the received
|
|
* reply will be large, but slush is provided here to allow
|
|
* flexibility when marshaling.
|
|
*/
|
|
min_size = RPCRDMA_INLINE_READ_THRESHOLD(task->tk_rqstp);
|
|
min_size += RPCRDMA_INLINE_WRITE_THRESHOLD(task->tk_rqstp);
|
|
if (size < min_size)
|
|
size = min_size;
|
|
|
|
rb = rpcrdma_alloc_regbuf(&r_xprt->rx_ia, size, flags);
|
|
if (IS_ERR(rb))
|
|
goto out_fail;
|
|
rb->rg_owner = req;
|
|
|
|
r_xprt->rx_stats.hardway_register_count += size;
|
|
rpcrdma_free_regbuf(&r_xprt->rx_ia, req->rl_sendbuf);
|
|
req->rl_sendbuf = rb;
|
|
goto out;
|
|
|
|
out_fail:
|
|
rpcrdma_buffer_put(req);
|
|
r_xprt->rx_stats.failed_marshal_count++;
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* This function returns all RDMA resources to the pool.
|
|
*/
|
|
static void
|
|
xprt_rdma_free(void *buffer)
|
|
{
|
|
struct rpcrdma_req *req;
|
|
struct rpcrdma_xprt *r_xprt;
|
|
struct rpcrdma_regbuf *rb;
|
|
int i;
|
|
|
|
if (buffer == NULL)
|
|
return;
|
|
|
|
rb = container_of(buffer, struct rpcrdma_regbuf, rg_base[0]);
|
|
req = rb->rg_owner;
|
|
r_xprt = container_of(req->rl_buffer, struct rpcrdma_xprt, rx_buf);
|
|
|
|
dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply);
|
|
|
|
for (i = 0; req->rl_nchunks;) {
|
|
--req->rl_nchunks;
|
|
i += rpcrdma_deregister_external(
|
|
&req->rl_segments[i], r_xprt);
|
|
}
|
|
|
|
rpcrdma_buffer_put(req);
|
|
}
|
|
|
|
/*
|
|
* send_request invokes the meat of RPC RDMA. It must do the following:
|
|
* 1. Marshal the RPC request into an RPC RDMA request, which means
|
|
* putting a header in front of data, and creating IOVs for RDMA
|
|
* from those in the request.
|
|
* 2. In marshaling, detect opportunities for RDMA, and use them.
|
|
* 3. Post a recv message to set up asynch completion, then send
|
|
* the request (rpcrdma_ep_post).
|
|
* 4. No partial sends are possible in the RPC-RDMA protocol (as in UDP).
|
|
*/
|
|
|
|
static int
|
|
xprt_rdma_send_request(struct rpc_task *task)
|
|
{
|
|
struct rpc_rqst *rqst = task->tk_rqstp;
|
|
struct rpc_xprt *xprt = rqst->rq_xprt;
|
|
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
|
|
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
|
|
int rc = 0;
|
|
|
|
if (req->rl_niovs == 0)
|
|
rc = rpcrdma_marshal_req(rqst);
|
|
else if (r_xprt->rx_ia.ri_memreg_strategy != RPCRDMA_ALLPHYSICAL)
|
|
rc = rpcrdma_marshal_chunks(rqst, 0);
|
|
if (rc < 0)
|
|
goto failed_marshal;
|
|
|
|
if (req->rl_reply == NULL) /* e.g. reconnection */
|
|
rpcrdma_recv_buffer_get(req);
|
|
|
|
if (req->rl_reply) {
|
|
req->rl_reply->rr_func = rpcrdma_reply_handler;
|
|
/* this need only be done once, but... */
|
|
req->rl_reply->rr_xprt = xprt;
|
|
}
|
|
|
|
/* Must suppress retransmit to maintain credits */
|
|
if (req->rl_connect_cookie == xprt->connect_cookie)
|
|
goto drop_connection;
|
|
req->rl_connect_cookie = xprt->connect_cookie;
|
|
|
|
if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req))
|
|
goto drop_connection;
|
|
|
|
rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len;
|
|
rqst->rq_bytes_sent = 0;
|
|
return 0;
|
|
|
|
failed_marshal:
|
|
r_xprt->rx_stats.failed_marshal_count++;
|
|
dprintk("RPC: %s: rpcrdma_marshal_req failed, status %i\n",
|
|
__func__, rc);
|
|
if (rc == -EIO)
|
|
return -EIO;
|
|
drop_connection:
|
|
xprt_disconnect_done(xprt);
|
|
return -ENOTCONN; /* implies disconnect */
|
|
}
|
|
|
|
static void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
|
|
{
|
|
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
|
|
long idle_time = 0;
|
|
|
|
if (xprt_connected(xprt))
|
|
idle_time = (long)(jiffies - xprt->last_used) / HZ;
|
|
|
|
seq_printf(seq,
|
|
"\txprt:\trdma %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu "
|
|
"%lu %lu %lu %Lu %Lu %Lu %Lu %lu %lu %lu\n",
|
|
|
|
0, /* need a local port? */
|
|
xprt->stat.bind_count,
|
|
xprt->stat.connect_count,
|
|
xprt->stat.connect_time,
|
|
idle_time,
|
|
xprt->stat.sends,
|
|
xprt->stat.recvs,
|
|
xprt->stat.bad_xids,
|
|
xprt->stat.req_u,
|
|
xprt->stat.bklog_u,
|
|
|
|
r_xprt->rx_stats.read_chunk_count,
|
|
r_xprt->rx_stats.write_chunk_count,
|
|
r_xprt->rx_stats.reply_chunk_count,
|
|
r_xprt->rx_stats.total_rdma_request,
|
|
r_xprt->rx_stats.total_rdma_reply,
|
|
r_xprt->rx_stats.pullup_copy_count,
|
|
r_xprt->rx_stats.fixup_copy_count,
|
|
r_xprt->rx_stats.hardway_register_count,
|
|
r_xprt->rx_stats.failed_marshal_count,
|
|
r_xprt->rx_stats.bad_reply_count);
|
|
}
|
|
|
|
/*
|
|
* Plumbing for rpc transport switch and kernel module
|
|
*/
|
|
|
|
static struct rpc_xprt_ops xprt_rdma_procs = {
|
|
.reserve_xprt = xprt_reserve_xprt_cong,
|
|
.release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */
|
|
.alloc_slot = xprt_alloc_slot,
|
|
.release_request = xprt_release_rqst_cong, /* ditto */
|
|
.set_retrans_timeout = xprt_set_retrans_timeout_def, /* ditto */
|
|
.rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */
|
|
.set_port = xprt_rdma_set_port,
|
|
.connect = xprt_rdma_connect,
|
|
.buf_alloc = xprt_rdma_allocate,
|
|
.buf_free = xprt_rdma_free,
|
|
.send_request = xprt_rdma_send_request,
|
|
.close = xprt_rdma_close,
|
|
.destroy = xprt_rdma_destroy,
|
|
.print_stats = xprt_rdma_print_stats
|
|
};
|
|
|
|
static struct xprt_class xprt_rdma = {
|
|
.list = LIST_HEAD_INIT(xprt_rdma.list),
|
|
.name = "rdma",
|
|
.owner = THIS_MODULE,
|
|
.ident = XPRT_TRANSPORT_RDMA,
|
|
.setup = xprt_setup_rdma,
|
|
};
|
|
|
|
static void __exit xprt_rdma_cleanup(void)
|
|
{
|
|
int rc;
|
|
|
|
dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n");
|
|
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
|
|
if (sunrpc_table_header) {
|
|
unregister_sysctl_table(sunrpc_table_header);
|
|
sunrpc_table_header = NULL;
|
|
}
|
|
#endif
|
|
rc = xprt_unregister_transport(&xprt_rdma);
|
|
if (rc)
|
|
dprintk("RPC: %s: xprt_unregister returned %i\n",
|
|
__func__, rc);
|
|
}
|
|
|
|
static int __init xprt_rdma_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = xprt_register_transport(&xprt_rdma);
|
|
|
|
if (rc)
|
|
return rc;
|
|
|
|
dprintk("RPCRDMA Module Init, register RPC RDMA transport\n");
|
|
|
|
dprintk("Defaults:\n");
|
|
dprintk("\tSlots %d\n"
|
|
"\tMaxInlineRead %d\n\tMaxInlineWrite %d\n",
|
|
xprt_rdma_slot_table_entries,
|
|
xprt_rdma_max_inline_read, xprt_rdma_max_inline_write);
|
|
dprintk("\tPadding %d\n\tMemreg %d\n",
|
|
xprt_rdma_inline_write_padding, xprt_rdma_memreg_strategy);
|
|
|
|
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
|
|
if (!sunrpc_table_header)
|
|
sunrpc_table_header = register_sysctl_table(sunrpc_table);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
module_init(xprt_rdma_init);
|
|
module_exit(xprt_rdma_cleanup);
|