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kernel/linux-imx6_3.14.28/net/dccp/sysctl.c 2.77 KB
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  /*
   *  net/dccp/sysctl.c
   *
   *  An implementation of the DCCP protocol
   *  Arnaldo Carvalho de Melo <acme@mandriva.com>
   *
   *	This program is free software; you can redistribute it and/or
   *	modify it under the terms of the GNU General Public License v2
   *	as published by the Free Software Foundation.
   */
  
  #include <linux/mm.h>
  #include <linux/sysctl.h>
  #include "dccp.h"
  #include "feat.h"
  
  #ifndef CONFIG_SYSCTL
  #error This file should not be compiled without CONFIG_SYSCTL defined
  #endif
  
  /* Boundary values */
  static int		zero     = 0,
  			u8_max   = 0xFF;
  static unsigned long	seqw_min = DCCPF_SEQ_WMIN,
  			seqw_max = 0xFFFFFFFF;		/* maximum on 32 bit */
  
  static struct ctl_table dccp_default_table[] = {
  	{
  		.procname	= "seq_window",
  		.data		= &sysctl_dccp_sequence_window,
  		.maxlen		= sizeof(sysctl_dccp_sequence_window),
  		.mode		= 0644,
  		.proc_handler	= proc_doulongvec_minmax,
  		.extra1		= &seqw_min,		/* RFC 4340, 7.5.2 */
  		.extra2		= &seqw_max,
  	},
  	{
  		.procname	= "rx_ccid",
  		.data		= &sysctl_dccp_rx_ccid,
  		.maxlen		= sizeof(sysctl_dccp_rx_ccid),
  		.mode		= 0644,
  		.proc_handler	= proc_dointvec_minmax,
  		.extra1		= &zero,
  		.extra2		= &u8_max,		/* RFC 4340, 10. */
  	},
  	{
  		.procname	= "tx_ccid",
  		.data		= &sysctl_dccp_tx_ccid,
  		.maxlen		= sizeof(sysctl_dccp_tx_ccid),
  		.mode		= 0644,
  		.proc_handler	= proc_dointvec_minmax,
  		.extra1		= &zero,
  		.extra2		= &u8_max,		/* RFC 4340, 10. */
  	},
  	{
  		.procname	= "request_retries",
  		.data		= &sysctl_dccp_request_retries,
  		.maxlen		= sizeof(sysctl_dccp_request_retries),
  		.mode		= 0644,
  		.proc_handler	= proc_dointvec_minmax,
  		.extra1		= &zero,
  		.extra2		= &u8_max,
  	},
  	{
  		.procname	= "retries1",
  		.data		= &sysctl_dccp_retries1,
  		.maxlen		= sizeof(sysctl_dccp_retries1),
  		.mode		= 0644,
  		.proc_handler	= proc_dointvec_minmax,
  		.extra1		= &zero,
  		.extra2		= &u8_max,
  	},
  	{
  		.procname	= "retries2",
  		.data		= &sysctl_dccp_retries2,
  		.maxlen		= sizeof(sysctl_dccp_retries2),
  		.mode		= 0644,
  		.proc_handler	= proc_dointvec_minmax,
  		.extra1		= &zero,
  		.extra2		= &u8_max,
  	},
  	{
  		.procname	= "tx_qlen",
  		.data		= &sysctl_dccp_tx_qlen,
  		.maxlen		= sizeof(sysctl_dccp_tx_qlen),
  		.mode		= 0644,
  		.proc_handler	= proc_dointvec_minmax,
  		.extra1		= &zero,
  	},
  	{
  		.procname	= "sync_ratelimit",
  		.data		= &sysctl_dccp_sync_ratelimit,
  		.maxlen		= sizeof(sysctl_dccp_sync_ratelimit),
  		.mode		= 0644,
  		.proc_handler	= proc_dointvec_ms_jiffies,
  	},
  
  	{ }
  };
  
  static struct ctl_table_header *dccp_table_header;
  
  int __init dccp_sysctl_init(void)
  {
  	dccp_table_header = register_net_sysctl(&init_net, "net/dccp/default",
  			dccp_default_table);
  
  	return dccp_table_header != NULL ? 0 : -ENOMEM;
  }
  
  void dccp_sysctl_exit(void)
  {
  	if (dccp_table_header != NULL) {
  		unregister_net_sysctl_table(dccp_table_header);
  		dccp_table_header = NULL;
  	}
  }