// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Copyright (c) 2014-2017 Oracle. All rights reserved.
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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/slab.h>
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#include <linux/seq_file.h>
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#include <linux/smp.h>
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#include <linux/sunrpc/addr.h>
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#include <linux/sunrpc/svc_rdma.h>
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#include "xprt_rdma.h"
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#include <trace/events/rpcrdma.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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/*
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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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unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
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unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
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unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRWR;
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int xprt_rdma_pad_optimize;
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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 min_inline_size = RPCRDMA_MIN_INLINE;
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static unsigned int max_inline_size = RPCRDMA_MAX_INLINE;
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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 unsigned int dummy;
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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_minmax,
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.extra1 = &min_inline_size,
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.extra2 = &max_inline_size,
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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_minmax,
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.extra1 = &min_inline_size,
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.extra2 = &max_inline_size,
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},
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{
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.procname = "rdma_inline_write_padding",
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.data = &dummy,
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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 = SYSCTL_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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static const struct rpc_xprt_ops xprt_rdma_procs;
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static void
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xprt_rdma_format_addresses4(struct rpc_xprt *xprt, struct sockaddr *sap)
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{
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struct sockaddr_in *sin = (struct sockaddr_in *)sap;
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char buf[20];
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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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xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA;
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}
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static void
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xprt_rdma_format_addresses6(struct rpc_xprt *xprt, struct sockaddr *sap)
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{
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struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
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char buf[40];
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snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr);
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xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
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xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA6;
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}
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void
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xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap)
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{
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char buf[128];
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switch (sap->sa_family) {
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case AF_INET:
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xprt_rdma_format_addresses4(xprt, sap);
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break;
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case AF_INET6:
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xprt_rdma_format_addresses6(xprt, sap);
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break;
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default:
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pr_err("rpcrdma: Unrecognized address family\n");
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return;
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}
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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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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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xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma";
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}
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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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/**
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* xprt_rdma_connect_worker - establish connection in the background
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* @work: worker thread context
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*
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* Requester holds the xprt's send lock to prevent activity on this
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* transport while a fresh connection is being established. RPC tasks
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* sleep on the xprt's pending queue waiting for connect to complete.
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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;
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rc = rpcrdma_xprt_connect(r_xprt);
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xprt_clear_connecting(xprt);
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if (!rc) {
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xprt->connect_cookie++;
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xprt->stat.connect_count++;
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xprt->stat.connect_time += (long)jiffies -
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xprt->stat.connect_start;
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xprt_set_connected(xprt);
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rc = -EAGAIN;
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} else
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rpcrdma_xprt_disconnect(r_xprt);
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xprt_unlock_connect(xprt, r_xprt);
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xprt_wake_pending_tasks(xprt, rc);
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}
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/**
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* xprt_rdma_inject_disconnect - inject a connection fault
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* @xprt: transport context
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*
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* If @xprt is connected, disconnect it to simulate spurious
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* connection loss. Caller must hold @xprt's send lock to
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* ensure that data structures and hardware resources are
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* stable during the rdma_disconnect() call.
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*/
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static void
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xprt_rdma_inject_disconnect(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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trace_xprtrdma_op_inject_dsc(r_xprt);
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rdma_disconnect(r_xprt->rx_ep->re_id);
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}
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/**
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* xprt_rdma_destroy - Full tear down of transport
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* @xprt: doomed transport context
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*
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* Caller guarantees there will be no more calls to us with
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* this @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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cancel_delayed_work_sync(&r_xprt->rx_connect_worker);
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rpcrdma_xprt_disconnect(r_xprt);
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rpcrdma_buffer_destroy(&r_xprt->rx_buf);
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xprt_rdma_free_addresses(xprt);
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xprt_free(xprt);
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module_put(THIS_MODULE);
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}
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/* 60 second timeout, no retries */
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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 rpc_xprt *xprt;
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struct rpcrdma_xprt *new_xprt;
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struct sockaddr *sap;
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int rc;
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if (args->addrlen > sizeof(xprt->addr))
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return ERR_PTR(-EBADF);
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if (!try_module_get(THIS_MODULE))
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return ERR_PTR(-EIO);
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xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), 0,
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xprt_rdma_slot_table_entries);
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if (!xprt) {
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module_put(THIS_MODULE);
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return ERR_PTR(-ENOMEM);
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}
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xprt->timeout = &xprt_rdma_default_timeout;
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xprt->connect_timeout = xprt->timeout->to_initval;
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xprt->max_reconnect_timeout = xprt->timeout->to_maxval;
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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->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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sap = args->dstaddr;
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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, sap, xprt->addrlen);
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if (rpc_get_port(sap))
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xprt_set_bound(xprt);
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xprt_rdma_format_addresses(xprt, sap);
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new_xprt = rpcx_to_rdmax(xprt);
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rc = rpcrdma_buffer_create(new_xprt);
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if (rc) {
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xprt_rdma_free_addresses(xprt);
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xprt_free(xprt);
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module_put(THIS_MODULE);
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return ERR_PTR(rc);
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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->max_payload = RPCRDMA_MAX_DATA_SEGS << PAGE_SHIFT;
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return xprt;
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}
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/**
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* xprt_rdma_close - close a transport connection
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* @xprt: transport context
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*
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* Called during autoclose or device removal.
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*
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* Caller holds @xprt's send lock to prevent activity on this
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* transport while the connection is torn down.
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*/
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void 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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rpcrdma_xprt_disconnect(r_xprt);
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xprt->reestablish_timeout = 0;
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++xprt->connect_cookie;
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xprt_disconnect_done(xprt);
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}
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/**
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* xprt_rdma_set_port - update server port with rpcbind result
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* @xprt: controlling RPC transport
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* @port: new port value
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*
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* Transport connect status is unchanged.
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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 *sap = (struct sockaddr *)&xprt->addr;
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char buf[8];
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rpc_set_port(sap, port);
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kfree(xprt->address_strings[RPC_DISPLAY_PORT]);
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snprintf(buf, sizeof(buf), "%u", port);
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xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
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kfree(xprt->address_strings[RPC_DISPLAY_HEX_PORT]);
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snprintf(buf, sizeof(buf), "%4hx", port);
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xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
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}
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/**
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* xprt_rdma_timer - invoked when an RPC times out
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* @xprt: controlling RPC transport
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* @task: RPC task that timed out
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*
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* Invoked when the transport is still connected, but an RPC
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* retransmit timeout occurs.
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*
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* Since RDMA connections don't have a keep-alive, forcibly
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* disconnect and retry to connect. This drives full
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* detection of the network path, and retransmissions of
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* all pending RPCs.
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*/
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static void
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xprt_rdma_timer(struct rpc_xprt *xprt, struct rpc_task *task)
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{
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xprt_force_disconnect(xprt);
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}
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/**
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* xprt_rdma_set_connect_timeout - set timeouts for establishing a connection
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* @xprt: controlling transport instance
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* @connect_timeout: reconnect timeout after client disconnects
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* @reconnect_timeout: reconnect timeout after server disconnects
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*
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*/
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static void xprt_rdma_set_connect_timeout(struct rpc_xprt *xprt,
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unsigned long connect_timeout,
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unsigned long reconnect_timeout)
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{
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struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
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trace_xprtrdma_op_set_cto(r_xprt, connect_timeout, reconnect_timeout);
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spin_lock(&xprt->transport_lock);
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if (connect_timeout < xprt->connect_timeout) {
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struct rpc_timeout to;
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unsigned long initval;
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to = *xprt->timeout;
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initval = connect_timeout;
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if (initval < RPCRDMA_INIT_REEST_TO << 1)
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initval = RPCRDMA_INIT_REEST_TO << 1;
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to.to_initval = initval;
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to.to_maxval = initval;
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r_xprt->rx_timeout = to;
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xprt->timeout = &r_xprt->rx_timeout;
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xprt->connect_timeout = connect_timeout;
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}
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if (reconnect_timeout < xprt->max_reconnect_timeout)
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xprt->max_reconnect_timeout = reconnect_timeout;
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spin_unlock(&xprt->transport_lock);
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}
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/**
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* xprt_rdma_connect - schedule an attempt to reconnect
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* @xprt: transport state
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* @task: RPC scheduler context (unused)
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*
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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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struct rpcrdma_ep *ep = r_xprt->rx_ep;
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unsigned long delay;
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WARN_ON_ONCE(!xprt_lock_connect(xprt, task, r_xprt));
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delay = 0;
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if (ep && ep->re_connect_status != 0) {
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delay = xprt_reconnect_delay(xprt);
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xprt_reconnect_backoff(xprt, RPCRDMA_INIT_REEST_TO);
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}
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trace_xprtrdma_op_connect(r_xprt, delay);
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queue_delayed_work(xprtiod_workqueue, &r_xprt->rx_connect_worker,
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delay);
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}
|
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/**
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* xprt_rdma_alloc_slot - allocate an rpc_rqst
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* @xprt: controlling RPC transport
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* @task: RPC task requesting a fresh rpc_rqst
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*
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* tk_status values:
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* %0 if task->tk_rqstp points to a fresh rpc_rqst
|
* %-EAGAIN if no rpc_rqst is available; queued on backlog
|
*/
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static void
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xprt_rdma_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task)
|
{
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struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
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struct rpcrdma_req *req;
|
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req = rpcrdma_buffer_get(&r_xprt->rx_buf);
|
if (!req)
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goto out_sleep;
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task->tk_rqstp = &req->rl_slot;
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task->tk_status = 0;
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return;
|
|
out_sleep:
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task->tk_status = -ENOMEM;
|
xprt_add_backlog(xprt, task);
|
}
|
|
/**
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* xprt_rdma_free_slot - release an rpc_rqst
|
* @xprt: controlling RPC transport
|
* @rqst: rpc_rqst to release
|
*
|
*/
|
static void
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xprt_rdma_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *rqst)
|
{
|
struct rpcrdma_xprt *r_xprt =
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container_of(xprt, struct rpcrdma_xprt, rx_xprt);
|
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rpcrdma_reply_put(&r_xprt->rx_buf, rpcr_to_rdmar(rqst));
|
if (!xprt_wake_up_backlog(xprt, rqst)) {
|
memset(rqst, 0, sizeof(*rqst));
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rpcrdma_buffer_put(&r_xprt->rx_buf, rpcr_to_rdmar(rqst));
|
}
|
}
|
|
static bool rpcrdma_check_regbuf(struct rpcrdma_xprt *r_xprt,
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struct rpcrdma_regbuf *rb, size_t size,
|
gfp_t flags)
|
{
|
if (unlikely(rdmab_length(rb) < size)) {
|
if (!rpcrdma_regbuf_realloc(rb, size, flags))
|
return false;
|
r_xprt->rx_stats.hardway_register_count += size;
|
}
|
return true;
|
}
|
|
/**
|
* xprt_rdma_allocate - allocate transport resources for an RPC
|
* @task: RPC task
|
*
|
* Return values:
|
* 0: Success; rq_buffer points to RPC buffer to use
|
* ENOMEM: Out of memory, call again later
|
* EIO: A permanent error occurred, do not retry
|
*/
|
static int
|
xprt_rdma_allocate(struct rpc_task *task)
|
{
|
struct rpc_rqst *rqst = task->tk_rqstp;
|
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
|
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
|
gfp_t flags;
|
|
flags = RPCRDMA_DEF_GFP;
|
if (RPC_IS_ASYNC(task))
|
flags = GFP_NOWAIT | __GFP_NOWARN;
|
if (RPC_IS_SWAPPER(task))
|
flags |= __GFP_MEMALLOC;
|
|
if (!rpcrdma_check_regbuf(r_xprt, req->rl_sendbuf, rqst->rq_callsize,
|
flags))
|
goto out_fail;
|
if (!rpcrdma_check_regbuf(r_xprt, req->rl_recvbuf, rqst->rq_rcvsize,
|
flags))
|
goto out_fail;
|
|
rqst->rq_buffer = rdmab_data(req->rl_sendbuf);
|
rqst->rq_rbuffer = rdmab_data(req->rl_recvbuf);
|
return 0;
|
|
out_fail:
|
return -ENOMEM;
|
}
|
|
/**
|
* xprt_rdma_free - release resources allocated by xprt_rdma_allocate
|
* @task: RPC task
|
*
|
* Caller guarantees rqst->rq_buffer is non-NULL.
|
*/
|
static void
|
xprt_rdma_free(struct rpc_task *task)
|
{
|
struct rpc_rqst *rqst = task->tk_rqstp;
|
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
|
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
|
|
if (!list_empty(&req->rl_registered))
|
frwr_unmap_sync(r_xprt, req);
|
|
/* XXX: If the RPC is completing because of a signal and
|
* not because a reply was received, we ought to ensure
|
* that the Send completion has fired, so that memory
|
* involved with the Send is not still visible to the NIC.
|
*/
|
}
|
|
/**
|
* xprt_rdma_send_request - marshal and send an RPC request
|
* @rqst: RPC message in rq_snd_buf
|
*
|
* Caller holds the transport's write lock.
|
*
|
* Returns:
|
* %0 if the RPC message has been sent
|
* %-ENOTCONN if the caller should reconnect and call again
|
* %-EAGAIN if the caller should call again
|
* %-ENOBUFS if the caller should call again after a delay
|
* %-EMSGSIZE if encoding ran out of buffer space. The request
|
* was not sent. Do not try to send this message again.
|
* %-EIO if an I/O error occurred. The request was not sent.
|
* Do not try to send this message again.
|
*/
|
static int
|
xprt_rdma_send_request(struct rpc_rqst *rqst)
|
{
|
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 defined(CONFIG_SUNRPC_BACKCHANNEL)
|
if (unlikely(!rqst->rq_buffer))
|
return xprt_rdma_bc_send_reply(rqst);
|
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
|
|
if (!xprt_connected(xprt))
|
return -ENOTCONN;
|
|
if (!xprt_request_get_cong(xprt, rqst))
|
return -EBADSLT;
|
|
rc = rpcrdma_marshal_req(r_xprt, rqst);
|
if (rc < 0)
|
goto failed_marshal;
|
|
/* Must suppress retransmit to maintain credits */
|
if (rqst->rq_connect_cookie == xprt->connect_cookie)
|
goto drop_connection;
|
rqst->rq_xtime = ktime_get();
|
|
if (rpcrdma_post_sends(r_xprt, req))
|
goto drop_connection;
|
|
rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len;
|
|
/* An RPC with no reply will throw off credit accounting,
|
* so drop the connection to reset the credit grant.
|
*/
|
if (!rpc_reply_expected(rqst->rq_task))
|
goto drop_connection;
|
return 0;
|
|
failed_marshal:
|
if (rc != -ENOTCONN)
|
return rc;
|
drop_connection:
|
xprt_rdma_close(xprt);
|
return -ENOTCONN;
|
}
|
|
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_puts(seq, "\txprt:\trdma ");
|
seq_printf(seq, "%u %lu %lu %lu %ld %lu %lu %lu %llu %llu ",
|
0, /* need a local port? */
|
xprt->stat.bind_count,
|
xprt->stat.connect_count,
|
xprt->stat.connect_time / HZ,
|
idle_time,
|
xprt->stat.sends,
|
xprt->stat.recvs,
|
xprt->stat.bad_xids,
|
xprt->stat.req_u,
|
xprt->stat.bklog_u);
|
seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %lu %lu %lu %lu ",
|
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,
|
r_xprt->rx_stats.nomsg_call_count);
|
seq_printf(seq, "%lu %lu %lu %lu %lu %lu\n",
|
r_xprt->rx_stats.mrs_recycled,
|
r_xprt->rx_stats.mrs_orphaned,
|
r_xprt->rx_stats.mrs_allocated,
|
r_xprt->rx_stats.local_inv_needed,
|
r_xprt->rx_stats.empty_sendctx_q,
|
r_xprt->rx_stats.reply_waits_for_send);
|
}
|
|
static int
|
xprt_rdma_enable_swap(struct rpc_xprt *xprt)
|
{
|
return 0;
|
}
|
|
static void
|
xprt_rdma_disable_swap(struct rpc_xprt *xprt)
|
{
|
}
|
|
/*
|
* Plumbing for rpc transport switch and kernel module
|
*/
|
|
static const 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_rdma_alloc_slot,
|
.free_slot = xprt_rdma_free_slot,
|
.release_request = xprt_release_rqst_cong, /* ditto */
|
.wait_for_reply_request = xprt_wait_for_reply_request_def, /* ditto */
|
.timer = xprt_rdma_timer,
|
.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,
|
.set_connect_timeout = xprt_rdma_set_connect_timeout,
|
.print_stats = xprt_rdma_print_stats,
|
.enable_swap = xprt_rdma_enable_swap,
|
.disable_swap = xprt_rdma_disable_swap,
|
.inject_disconnect = xprt_rdma_inject_disconnect,
|
#if defined(CONFIG_SUNRPC_BACKCHANNEL)
|
.bc_setup = xprt_rdma_bc_setup,
|
.bc_maxpayload = xprt_rdma_bc_maxpayload,
|
.bc_num_slots = xprt_rdma_bc_max_slots,
|
.bc_free_rqst = xprt_rdma_bc_free_rqst,
|
.bc_destroy = xprt_rdma_bc_destroy,
|
#endif
|
};
|
|
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,
|
.netid = { "rdma", "rdma6", "" },
|
};
|
|
void xprt_rdma_cleanup(void)
|
{
|
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
|
if (sunrpc_table_header) {
|
unregister_sysctl_table(sunrpc_table_header);
|
sunrpc_table_header = NULL;
|
}
|
#endif
|
|
xprt_unregister_transport(&xprt_rdma);
|
xprt_unregister_transport(&xprt_rdma_bc);
|
}
|
|
int xprt_rdma_init(void)
|
{
|
int rc;
|
|
rc = xprt_register_transport(&xprt_rdma);
|
if (rc)
|
return rc;
|
|
rc = xprt_register_transport(&xprt_rdma_bc);
|
if (rc) {
|
xprt_unregister_transport(&xprt_rdma);
|
return rc;
|
}
|
|
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
|
if (!sunrpc_table_header)
|
sunrpc_table_header = register_sysctl_table(sunrpc_table);
|
#endif
|
return 0;
|
}
|
