cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sysctl_net_llc.c (1877B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * sysctl_net_llc.c: sysctl interface to LLC net subsystem.
      4 *
      5 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
      6 */
      7
      8#include <linux/mm.h>
      9#include <linux/init.h>
     10#include <linux/sysctl.h>
     11#include <net/net_namespace.h>
     12#include <net/llc.h>
     13
     14#ifndef CONFIG_SYSCTL
     15#error This file should not be compiled without CONFIG_SYSCTL defined
     16#endif
     17
     18static struct ctl_table llc2_timeout_table[] = {
     19	{
     20		.procname	= "ack",
     21		.data		= &sysctl_llc2_ack_timeout,
     22		.maxlen		= sizeof(sysctl_llc2_ack_timeout),
     23		.mode		= 0644,
     24		.proc_handler   = proc_dointvec_jiffies,
     25	},
     26	{
     27		.procname	= "busy",
     28		.data		= &sysctl_llc2_busy_timeout,
     29		.maxlen		= sizeof(sysctl_llc2_busy_timeout),
     30		.mode		= 0644,
     31		.proc_handler   = proc_dointvec_jiffies,
     32	},
     33	{
     34		.procname	= "p",
     35		.data		= &sysctl_llc2_p_timeout,
     36		.maxlen		= sizeof(sysctl_llc2_p_timeout),
     37		.mode		= 0644,
     38		.proc_handler   = proc_dointvec_jiffies,
     39	},
     40	{
     41		.procname	= "rej",
     42		.data		= &sysctl_llc2_rej_timeout,
     43		.maxlen		= sizeof(sysctl_llc2_rej_timeout),
     44		.mode		= 0644,
     45		.proc_handler   = proc_dointvec_jiffies,
     46	},
     47	{ },
     48};
     49
     50static struct ctl_table llc_station_table[] = {
     51	{ },
     52};
     53
     54static struct ctl_table_header *llc2_timeout_header;
     55static struct ctl_table_header *llc_station_header;
     56
     57int __init llc_sysctl_init(void)
     58{
     59	llc2_timeout_header = register_net_sysctl(&init_net, "net/llc/llc2/timeout", llc2_timeout_table);
     60	llc_station_header = register_net_sysctl(&init_net, "net/llc/station", llc_station_table);
     61
     62	if (!llc2_timeout_header || !llc_station_header) {
     63		llc_sysctl_exit();
     64		return -ENOMEM;
     65	}
     66	return 0;
     67}
     68
     69void llc_sysctl_exit(void)
     70{
     71	if (llc2_timeout_header) {
     72		unregister_net_sysctl_table(llc2_timeout_header);
     73		llc2_timeout_header = NULL;
     74	}
     75	if (llc_station_header) {
     76		unregister_net_sysctl_table(llc_station_header);
     77		llc_station_header = NULL;
     78	}
     79}