mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-09 17:02:46 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
747
net/sunrpc/xprtrdma/transport.c
Normal file
747
net/sunrpc/xprtrdma/transport.c
Normal file
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@ -0,0 +1,747 @@
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/*
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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
|
||||
* licenses. You may choose to be licensed under the terms of the GNU
|
||||
* General Public License (GPL) Version 2, available from the file
|
||||
* COPYING in the main directory of this source tree, or the BSD-type
|
||||
* license below:
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*
|
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* Redistributions in binary form must reproduce the above
|
||||
* copyright notice, this list of conditions and the following
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||||
* disclaimer in the documentation and/or other materials provided
|
||||
* 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
|
||||
* 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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#ifdef RPC_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 = 0;
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#ifdef RPC_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 =
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container_of(work, struct rpcrdma_xprt, rdma_connect.work);
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struct rpc_xprt *xprt = &r_xprt->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->rdma_connect);
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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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|
||||
/* 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;
|
||||
|
||||
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.
|
||||
*/
|
||||
|
||||
/* Put server RDMA address in local cdata */
|
||||
memcpy(&cdata.addr, args->dstaddr, args->addrlen);
|
||||
|
||||
/* Ensure xprt->addr holds valid server TCP (not RDMA)
|
||||
* address, for any side protocols which peek at it */
|
||||
xprt->prot = IPPROTO_TCP;
|
||||
xprt->addrlen = args->addrlen;
|
||||
memcpy(&xprt->addr, &cdata.addr, xprt->addrlen);
|
||||
|
||||
sin = (struct sockaddr_in *)&cdata.addr;
|
||||
if (ntohs(sin->sin_port) != 0)
|
||||
xprt_set_bound(xprt);
|
||||
|
||||
dprintk("RPC: %s: %pI4:%u\n",
|
||||
__func__, &sin->sin_addr.s_addr, ntohs(sin->sin_port));
|
||||
|
||||
/* Set max requests */
|
||||
cdata.max_requests = xprt->max_reqs;
|
||||
|
||||
/* Set some length limits */
|
||||
cdata.rsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA write max */
|
||||
cdata.wsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA read max */
|
||||
|
||||
cdata.inline_wsize = xprt_rdma_max_inline_write;
|
||||
if (cdata.inline_wsize > cdata.wsize)
|
||||
cdata.inline_wsize = cdata.wsize;
|
||||
|
||||
cdata.inline_rsize = xprt_rdma_max_inline_read;
|
||||
if (cdata.inline_rsize > cdata.rsize)
|
||||
cdata.inline_rsize = cdata.rsize;
|
||||
|
||||
cdata.padding = xprt_rdma_inline_write_padding;
|
||||
|
||||
/*
|
||||
* Create new transport instance, which includes initialized
|
||||
* o ia
|
||||
* o endpoint
|
||||
* o buffers
|
||||
*/
|
||||
|
||||
new_xprt = rpcx_to_rdmax(xprt);
|
||||
|
||||
rc = rpcrdma_ia_open(new_xprt, (struct sockaddr *) &cdata.addr,
|
||||
xprt_rdma_memreg_strategy);
|
||||
if (rc)
|
||||
goto out1;
|
||||
|
||||
/*
|
||||
* initialize and create ep
|
||||
*/
|
||||
new_xprt->rx_data = cdata;
|
||||
new_ep = &new_xprt->rx_ep;
|
||||
new_ep->rep_remote_addr = cdata.addr;
|
||||
|
||||
rc = rpcrdma_ep_create(&new_xprt->rx_ep,
|
||||
&new_xprt->rx_ia, &new_xprt->rx_data);
|
||||
if (rc)
|
||||
goto out2;
|
||||
|
||||
/*
|
||||
* Allocate pre-registered send and receive buffers for headers and
|
||||
* any inline data. Also specify any padding which will be provided
|
||||
* from a preregistered zero buffer.
|
||||
*/
|
||||
rc = rpcrdma_buffer_create(&new_xprt->rx_buf, new_ep, &new_xprt->rx_ia,
|
||||
&new_xprt->rx_data);
|
||||
if (rc)
|
||||
goto out3;
|
||||
|
||||
/*
|
||||
* Register a callback for connection events. This is necessary because
|
||||
* connection loss notification is async. We also catch connection loss
|
||||
* when reaping receives.
|
||||
*/
|
||||
INIT_DELAYED_WORK(&new_xprt->rdma_connect, xprt_rdma_connect_worker);
|
||||
new_ep->rep_func = rpcrdma_conn_func;
|
||||
new_ep->rep_xprt = xprt;
|
||||
|
||||
xprt_rdma_format_addresses(xprt);
|
||||
xprt->max_payload = rpcrdma_max_payload(new_xprt);
|
||||
dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
|
||||
__func__, xprt->max_payload);
|
||||
|
||||
if (!try_module_get(THIS_MODULE))
|
||||
goto out4;
|
||||
|
||||
return xprt;
|
||||
|
||||
out4:
|
||||
xprt_rdma_free_addresses(xprt);
|
||||
rc = -EINVAL;
|
||||
out3:
|
||||
rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia);
|
||||
out2:
|
||||
rpcrdma_ia_close(&new_xprt->rx_ia);
|
||||
out1:
|
||||
xprt_free(xprt);
|
||||
return ERR_PTR(rc);
|
||||
}
|
||||
|
||||
/*
|
||||
* Close a connection, during shutdown or timeout/reconnect
|
||||
*/
|
||||
static void
|
||||
xprt_rdma_close(struct rpc_xprt *xprt)
|
||||
{
|
||||
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
|
||||
|
||||
dprintk("RPC: %s: closing\n", __func__);
|
||||
if (r_xprt->rx_ep.rep_connected > 0)
|
||||
xprt->reestablish_timeout = 0;
|
||||
xprt_disconnect_done(xprt);
|
||||
rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia);
|
||||
}
|
||||
|
||||
static void
|
||||
xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port)
|
||||
{
|
||||
struct sockaddr_in *sap;
|
||||
|
||||
sap = (struct sockaddr_in *)&xprt->addr;
|
||||
sap->sin_port = htons(port);
|
||||
sap = (struct sockaddr_in *)&rpcx_to_rdmad(xprt).addr;
|
||||
sap->sin_port = htons(port);
|
||||
dprintk("RPC: %s: %u\n", __func__, port);
|
||||
}
|
||||
|
||||
static void
|
||||
xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task)
|
||||
{
|
||||
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
|
||||
|
||||
if (r_xprt->rx_ep.rep_connected != 0) {
|
||||
/* Reconnect */
|
||||
schedule_delayed_work(&r_xprt->rdma_connect,
|
||||
xprt->reestablish_timeout);
|
||||
xprt->reestablish_timeout <<= 1;
|
||||
if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO)
|
||||
xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO;
|
||||
else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO)
|
||||
xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
|
||||
} else {
|
||||
schedule_delayed_work(&r_xprt->rdma_connect, 0);
|
||||
if (!RPC_IS_ASYNC(task))
|
||||
flush_delayed_work(&r_xprt->rdma_connect);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* The RDMA allocate/free functions need the task structure as a place
|
||||
* to hide the struct rpcrdma_req, which is necessary for the actual send/recv
|
||||
* sequence. For this reason, the recv buffers are attached to send
|
||||
* buffers for portions of the RPC. Note that the RPC layer allocates
|
||||
* both send and receive buffers in the same call. We may register
|
||||
* the receive buffer portion when using reply chunks.
|
||||
*/
|
||||
static void *
|
||||
xprt_rdma_allocate(struct rpc_task *task, size_t size)
|
||||
{
|
||||
struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt;
|
||||
struct rpcrdma_req *req, *nreq;
|
||||
|
||||
req = rpcrdma_buffer_get(&rpcx_to_rdmax(xprt)->rx_buf);
|
||||
if (req == NULL)
|
||||
return NULL;
|
||||
|
||||
if (size > req->rl_size) {
|
||||
dprintk("RPC: %s: size %zd too large for buffer[%zd]: "
|
||||
"prog %d vers %d proc %d\n",
|
||||
__func__, size, req->rl_size,
|
||||
task->tk_client->cl_prog, task->tk_client->cl_vers,
|
||||
task->tk_msg.rpc_proc->p_proc);
|
||||
/*
|
||||
* Outgoing length shortage. Our inline write max must have
|
||||
* been configured to perform direct i/o.
|
||||
*
|
||||
* This is therefore a large metadata operation, and the
|
||||
* allocate call was made on the maximum possible message,
|
||||
* e.g. containing long filename(s) or symlink data. In
|
||||
* fact, while these metadata operations *might* carry
|
||||
* large outgoing payloads, they rarely *do*. However, we
|
||||
* have to commit to the request here, so reallocate and
|
||||
* register it now. The data path will never require this
|
||||
* reallocation.
|
||||
*
|
||||
* If the allocation or registration fails, the RPC framework
|
||||
* will (doggedly) retry.
|
||||
*/
|
||||
if (task->tk_flags & RPC_TASK_SWAPPER)
|
||||
nreq = kmalloc(sizeof *req + size, GFP_ATOMIC);
|
||||
else
|
||||
nreq = kmalloc(sizeof *req + size, GFP_NOFS);
|
||||
if (nreq == NULL)
|
||||
goto outfail;
|
||||
|
||||
if (rpcrdma_register_internal(&rpcx_to_rdmax(xprt)->rx_ia,
|
||||
nreq->rl_base, size + sizeof(struct rpcrdma_req)
|
||||
- offsetof(struct rpcrdma_req, rl_base),
|
||||
&nreq->rl_handle, &nreq->rl_iov)) {
|
||||
kfree(nreq);
|
||||
goto outfail;
|
||||
}
|
||||
rpcx_to_rdmax(xprt)->rx_stats.hardway_register_count += size;
|
||||
nreq->rl_size = size;
|
||||
nreq->rl_niovs = 0;
|
||||
nreq->rl_nchunks = 0;
|
||||
nreq->rl_buffer = (struct rpcrdma_buffer *)req;
|
||||
nreq->rl_reply = req->rl_reply;
|
||||
memcpy(nreq->rl_segments,
|
||||
req->rl_segments, sizeof nreq->rl_segments);
|
||||
/* flag the swap with an unused field */
|
||||
nreq->rl_iov.length = 0;
|
||||
req->rl_reply = NULL;
|
||||
req = nreq;
|
||||
}
|
||||
dprintk("RPC: %s: size %zd, request 0x%p\n", __func__, size, req);
|
||||
req->rl_connect_cookie = 0; /* our reserved value */
|
||||
return req->rl_xdr_buf;
|
||||
|
||||
outfail:
|
||||
rpcrdma_buffer_put(req);
|
||||
rpcx_to_rdmax(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_rep *rep;
|
||||
int i;
|
||||
|
||||
if (buffer == NULL)
|
||||
return;
|
||||
|
||||
req = container_of(buffer, struct rpcrdma_req, rl_xdr_buf[0]);
|
||||
if (req->rl_iov.length == 0) { /* see allocate above */
|
||||
r_xprt = container_of(((struct rpcrdma_req *) req->rl_buffer)->rl_buffer,
|
||||
struct rpcrdma_xprt, rx_buf);
|
||||
} else
|
||||
r_xprt = container_of(req->rl_buffer, struct rpcrdma_xprt, rx_buf);
|
||||
rep = req->rl_reply;
|
||||
|
||||
dprintk("RPC: %s: called on 0x%p%s\n",
|
||||
__func__, rep, (rep && rep->rr_func) ? " (with waiter)" : "");
|
||||
|
||||
/*
|
||||
* Finish the deregistration. The process is considered
|
||||
* complete when the rr_func vector becomes NULL - this
|
||||
* was put in place during rpcrdma_reply_handler() - the wait
|
||||
* call below will not block if the dereg is "done". If
|
||||
* interrupted, our framework will clean up.
|
||||
*/
|
||||
for (i = 0; req->rl_nchunks;) {
|
||||
--req->rl_nchunks;
|
||||
i += rpcrdma_deregister_external(
|
||||
&req->rl_segments[i], r_xprt);
|
||||
}
|
||||
|
||||
if (req->rl_iov.length == 0) { /* see allocate above */
|
||||
struct rpcrdma_req *oreq = (struct rpcrdma_req *)req->rl_buffer;
|
||||
oreq->rl_reply = req->rl_reply;
|
||||
(void) rpcrdma_deregister_internal(&r_xprt->rx_ia,
|
||||
req->rl_handle,
|
||||
&req->rl_iov);
|
||||
kfree(req);
|
||||
req = oreq;
|
||||
}
|
||||
|
||||
/* Put back request+reply buffers */
|
||||
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_FRMR)
|
||||
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");
|
||||
#ifdef RPC_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);
|
||||
|
||||
#ifdef RPC_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);
|
||||
Loading…
Add table
Add a link
Reference in a new issue