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This add a new sysctl: net.smc.autocorking_size We can dynamically change the behaviour of autocorking by change the value of autocorking_size. Setting to 0 disables autocorking in SMC Signed-off-by: Dust Li <dust.li@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* smc_sysctl.c: sysctl interface to SMC subsystem.
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*
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* Copyright (c) 2022, Alibaba Inc.
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*
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* Author: Tony Lu <tonylu@linux.alibaba.com>
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*
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*/
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#include <linux/init.h>
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#include <linux/sysctl.h>
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#include <net/net_namespace.h>
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#include "smc.h"
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#include "smc_sysctl.h"
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static struct ctl_table smc_table[] = {
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{
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.procname = "autocorking_size",
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.data = &init_net.smc.sysctl_autocorking_size,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_douintvec,
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},
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{ }
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};
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static __net_init int smc_sysctl_init_net(struct net *net)
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{
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struct ctl_table *table;
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table = smc_table;
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if (!net_eq(net, &init_net)) {
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int i;
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table = kmemdup(table, sizeof(smc_table), GFP_KERNEL);
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if (!table)
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goto err_alloc;
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for (i = 0; i < ARRAY_SIZE(smc_table) - 1; i++)
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table[i].data += (void *)net - (void *)&init_net;
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}
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net->smc.smc_hdr = register_net_sysctl(net, "net/smc", table);
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if (!net->smc.smc_hdr)
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goto err_reg;
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net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
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return 0;
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err_reg:
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if (!net_eq(net, &init_net))
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kfree(table);
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err_alloc:
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return -ENOMEM;
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}
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static __net_exit void smc_sysctl_exit_net(struct net *net)
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{
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unregister_net_sysctl_table(net->smc.smc_hdr);
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}
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static struct pernet_operations smc_sysctl_ops __net_initdata = {
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.init = smc_sysctl_init_net,
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.exit = smc_sysctl_exit_net,
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};
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int __init smc_sysctl_init(void)
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{
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return register_pernet_subsys(&smc_sysctl_ops);
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}
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void smc_sysctl_exit(void)
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{
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unregister_pernet_subsys(&smc_sysctl_ops);
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}
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