mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 00:24:12 +08:00
4bc5008e43
This patch introduces the sysctl smcr_buf_type for setting the type of SMC-R sndbufs and RMBs. Valid values includes: - SMCR_PHYS_CONT_BUFS, which means use physically contiguous buffers for better performance and is the default value. - SMCR_VIRT_CONT_BUFS, which means use virtually contiguous buffers in case of physically contiguous memory is scarce. - SMCR_MIXED_BUFS, which means first try to use physically contiguous buffers. If not available, then use virtually contiguous buffers. Signed-off-by: Wen Gu <guwen@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Shared Memory Communications over RDMA (SMC-R) and RoCE
|
|
*
|
|
* smc_sysctl.c: sysctl interface to SMC subsystem.
|
|
*
|
|
* Copyright (c) 2022, Alibaba Inc.
|
|
*
|
|
* Author: Tony Lu <tonylu@linux.alibaba.com>
|
|
*
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/sysctl.h>
|
|
#include <net/net_namespace.h>
|
|
|
|
#include "smc.h"
|
|
#include "smc_core.h"
|
|
#include "smc_sysctl.h"
|
|
|
|
static struct ctl_table smc_table[] = {
|
|
{
|
|
.procname = "autocorking_size",
|
|
.data = &init_net.smc.sysctl_autocorking_size,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_douintvec,
|
|
},
|
|
{
|
|
.procname = "smcr_buf_type",
|
|
.data = &init_net.smc.sysctl_smcr_buf_type,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_douintvec_minmax,
|
|
.extra1 = SYSCTL_ZERO,
|
|
.extra2 = SYSCTL_TWO,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
int __net_init smc_sysctl_net_init(struct net *net)
|
|
{
|
|
struct ctl_table *table;
|
|
|
|
table = smc_table;
|
|
if (!net_eq(net, &init_net)) {
|
|
int i;
|
|
|
|
table = kmemdup(table, sizeof(smc_table), GFP_KERNEL);
|
|
if (!table)
|
|
goto err_alloc;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(smc_table) - 1; i++)
|
|
table[i].data += (void *)net - (void *)&init_net;
|
|
}
|
|
|
|
net->smc.smc_hdr = register_net_sysctl(net, "net/smc", table);
|
|
if (!net->smc.smc_hdr)
|
|
goto err_reg;
|
|
|
|
net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
|
|
net->smc.sysctl_smcr_buf_type = SMCR_PHYS_CONT_BUFS;
|
|
|
|
return 0;
|
|
|
|
err_reg:
|
|
if (!net_eq(net, &init_net))
|
|
kfree(table);
|
|
err_alloc:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void __net_exit smc_sysctl_net_exit(struct net *net)
|
|
{
|
|
struct ctl_table *table;
|
|
|
|
table = net->smc.smc_hdr->ctl_table_arg;
|
|
unregister_net_sysctl_table(net->smc.smc_hdr);
|
|
if (!net_eq(net, &init_net))
|
|
kfree(table);
|
|
}
|