253 строки
7.0 KiB
C
253 строки
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
|
|
/*
|
|
* Copyright (c) 2015-2018 Oracle. All rights reserved.
|
|
* Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved.
|
|
*
|
|
* 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:
|
|
*
|
|
* 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
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* Neither the name of the Network Appliance, Inc. nor the names of
|
|
* its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* Author: Tom Tucker <tom@opengridcomputing.com>
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/sunrpc/clnt.h>
|
|
#include <linux/sunrpc/sched.h>
|
|
#include <linux/sunrpc/svc_rdma.h>
|
|
|
|
#define RPCDBG_FACILITY RPCDBG_SVCXPRT
|
|
|
|
/* RPC/RDMA parameters */
|
|
unsigned int svcrdma_ord = 16; /* historical default */
|
|
static unsigned int min_ord = 1;
|
|
static unsigned int max_ord = 255;
|
|
unsigned int svcrdma_max_requests = RPCRDMA_MAX_REQUESTS;
|
|
unsigned int svcrdma_max_bc_requests = RPCRDMA_MAX_BC_REQUESTS;
|
|
static unsigned int min_max_requests = 4;
|
|
static unsigned int max_max_requests = 16384;
|
|
unsigned int svcrdma_max_req_size = RPCRDMA_DEF_INLINE_THRESH;
|
|
static unsigned int min_max_inline = RPCRDMA_DEF_INLINE_THRESH;
|
|
static unsigned int max_max_inline = RPCRDMA_MAX_INLINE_THRESH;
|
|
|
|
atomic_t rdma_stat_recv;
|
|
atomic_t rdma_stat_read;
|
|
atomic_t rdma_stat_write;
|
|
atomic_t rdma_stat_sq_starve;
|
|
atomic_t rdma_stat_rq_starve;
|
|
atomic_t rdma_stat_rq_poll;
|
|
atomic_t rdma_stat_rq_prod;
|
|
atomic_t rdma_stat_sq_poll;
|
|
atomic_t rdma_stat_sq_prod;
|
|
|
|
/*
|
|
* This function implements reading and resetting an atomic_t stat
|
|
* variable through read/write to a proc file. Any write to the file
|
|
* resets the associated statistic to zero. Any read returns it's
|
|
* current value.
|
|
*/
|
|
static int read_reset_stat(struct ctl_table *table, int write,
|
|
void *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
atomic_t *stat = (atomic_t *)table->data;
|
|
|
|
if (!stat)
|
|
return -EINVAL;
|
|
|
|
if (write)
|
|
atomic_set(stat, 0);
|
|
else {
|
|
char str_buf[32];
|
|
int len = snprintf(str_buf, 32, "%d\n", atomic_read(stat));
|
|
if (len >= 32)
|
|
return -EFAULT;
|
|
len = strlen(str_buf);
|
|
if (*ppos > len) {
|
|
*lenp = 0;
|
|
return 0;
|
|
}
|
|
len -= *ppos;
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
if (len)
|
|
memcpy(buffer, str_buf, len);
|
|
*lenp = len;
|
|
*ppos += len;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct ctl_table_header *svcrdma_table_header;
|
|
static struct ctl_table svcrdma_parm_table[] = {
|
|
{
|
|
.procname = "max_requests",
|
|
.data = &svcrdma_max_requests,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &min_max_requests,
|
|
.extra2 = &max_max_requests
|
|
},
|
|
{
|
|
.procname = "max_req_size",
|
|
.data = &svcrdma_max_req_size,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &min_max_inline,
|
|
.extra2 = &max_max_inline
|
|
},
|
|
{
|
|
.procname = "max_outbound_read_requests",
|
|
.data = &svcrdma_ord,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &min_ord,
|
|
.extra2 = &max_ord,
|
|
},
|
|
|
|
{
|
|
.procname = "rdma_stat_read",
|
|
.data = &rdma_stat_read,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{
|
|
.procname = "rdma_stat_recv",
|
|
.data = &rdma_stat_recv,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{
|
|
.procname = "rdma_stat_write",
|
|
.data = &rdma_stat_write,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{
|
|
.procname = "rdma_stat_sq_starve",
|
|
.data = &rdma_stat_sq_starve,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{
|
|
.procname = "rdma_stat_rq_starve",
|
|
.data = &rdma_stat_rq_starve,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{
|
|
.procname = "rdma_stat_rq_poll",
|
|
.data = &rdma_stat_rq_poll,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{
|
|
.procname = "rdma_stat_rq_prod",
|
|
.data = &rdma_stat_rq_prod,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{
|
|
.procname = "rdma_stat_sq_poll",
|
|
.data = &rdma_stat_sq_poll,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{
|
|
.procname = "rdma_stat_sq_prod",
|
|
.data = &rdma_stat_sq_prod,
|
|
.maxlen = sizeof(atomic_t),
|
|
.mode = 0644,
|
|
.proc_handler = read_reset_stat,
|
|
},
|
|
{ },
|
|
};
|
|
|
|
static struct ctl_table svcrdma_table[] = {
|
|
{
|
|
.procname = "svc_rdma",
|
|
.mode = 0555,
|
|
.child = svcrdma_parm_table
|
|
},
|
|
{ },
|
|
};
|
|
|
|
static struct ctl_table svcrdma_root_table[] = {
|
|
{
|
|
.procname = "sunrpc",
|
|
.mode = 0555,
|
|
.child = svcrdma_table
|
|
},
|
|
{ },
|
|
};
|
|
|
|
void svc_rdma_cleanup(void)
|
|
{
|
|
dprintk("SVCRDMA Module Removed, deregister RPC RDMA transport\n");
|
|
if (svcrdma_table_header) {
|
|
unregister_sysctl_table(svcrdma_table_header);
|
|
svcrdma_table_header = NULL;
|
|
}
|
|
svc_unreg_xprt_class(&svc_rdma_class);
|
|
}
|
|
|
|
int svc_rdma_init(void)
|
|
{
|
|
dprintk("SVCRDMA Module Init, register RPC RDMA transport\n");
|
|
dprintk("\tsvcrdma_ord : %d\n", svcrdma_ord);
|
|
dprintk("\tmax_requests : %u\n", svcrdma_max_requests);
|
|
dprintk("\tmax_bc_requests : %u\n", svcrdma_max_bc_requests);
|
|
dprintk("\tmax_inline : %d\n", svcrdma_max_req_size);
|
|
|
|
if (!svcrdma_table_header)
|
|
svcrdma_table_header =
|
|
register_sysctl_table(svcrdma_root_table);
|
|
|
|
/* Register RDMA with the SVC transport switch */
|
|
svc_reg_xprt_class(&svc_rdma_class);
|
|
return 0;
|
|
}
|