forked from luck/tmp_suning_uos_patched
0b4d414714
The semantic effect of insert_at_head is that it would allow new registered sysctl entries to override existing sysctl entries of the same name. Which is pain for caching and the proc interface never implemented. I have done an audit and discovered that none of the current users of register_sysctl care as (excpet for directories) they do not register duplicate sysctl entries. So this patch simply removes the support for overriding existing entries in the sys_sysctl interface since no one uses it or cares and it makes future enhancments harder. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Howells <dhowells@redhat.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Andi Kleen <ak@muc.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Corey Minyard <minyard@acm.org> Cc: Neil Brown <neilb@suse.de> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Jan Kara <jack@ucw.cz> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Mark Fasheh <mark.fasheh@oracle.com> Cc: David Chinner <dgc@sgi.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Patrick McHardy <kaber@trash.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
297 lines
7.8 KiB
C
297 lines
7.8 KiB
C
/*********************************************************************
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*
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* Filename: irsysctl.c
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* Version: 1.0
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* Description: Sysctl interface for IrDA
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sun May 24 22:12:06 1998
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* Modified at: Fri Jun 4 02:50:15 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1997, 1999 Dag Brattli, All Rights Reserved.
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* Copyright (c) 2000-2001 Jean Tourrilhes <jt@hpl.hp.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* Neither Dag Brattli nor University of Tromsø admit liability nor
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* provide warranty for any of this software. This material is
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* provided "AS-IS" and at no charge.
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*
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********************************************************************/
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#include <linux/mm.h>
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#include <linux/ctype.h>
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#include <linux/sysctl.h>
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#include <linux/init.h>
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#include <net/irda/irda.h> /* irda_debug */
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#include <net/irda/irias_object.h>
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#define NET_IRDA 412 /* Random number */
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enum { DISCOVERY=1, DEVNAME, DEBUG, FAST_POLL, DISCOVERY_SLOTS,
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DISCOVERY_TIMEOUT, SLOT_TIMEOUT, MAX_BAUD_RATE, MIN_TX_TURN_TIME,
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MAX_TX_DATA_SIZE, MAX_TX_WINDOW, MAX_NOREPLY_TIME, WARN_NOREPLY_TIME,
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LAP_KEEPALIVE_TIME };
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extern int sysctl_discovery;
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extern int sysctl_discovery_slots;
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extern int sysctl_discovery_timeout;
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extern int sysctl_slot_timeout;
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extern int sysctl_fast_poll_increase;
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extern char sysctl_devname[];
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extern int sysctl_max_baud_rate;
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extern int sysctl_min_tx_turn_time;
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extern int sysctl_max_tx_data_size;
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extern int sysctl_max_tx_window;
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extern int sysctl_max_noreply_time;
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extern int sysctl_warn_noreply_time;
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extern int sysctl_lap_keepalive_time;
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/* this is needed for the proc_dointvec_minmax - Jean II */
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static int max_discovery_slots = 16; /* ??? */
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static int min_discovery_slots = 1;
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/* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
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* seems to require it. (from Dag's comment) */
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static int max_slot_timeout = 160;
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static int min_slot_timeout = 20;
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static int max_max_baud_rate = 16000000; /* See qos.c - IrLAP spec */
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static int min_max_baud_rate = 2400;
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static int max_min_tx_turn_time = 10000; /* See qos.c - IrLAP spec */
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static int min_min_tx_turn_time;
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static int max_max_tx_data_size = 2048; /* See qos.c - IrLAP spec */
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static int min_max_tx_data_size = 64;
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static int max_max_tx_window = 7; /* See qos.c - IrLAP spec */
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static int min_max_tx_window = 1;
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static int max_max_noreply_time = 40; /* See qos.c - IrLAP spec */
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static int min_max_noreply_time = 3;
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static int max_warn_noreply_time = 3; /* 3s == standard */
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static int min_warn_noreply_time = 1; /* 1s == min WD_TIMER */
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static int max_lap_keepalive_time = 10000; /* 10s */
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static int min_lap_keepalive_time = 100; /* 100us */
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/* For other sysctl, I've no idea of the range. Maybe Dag could help
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* us on that - Jean II */
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static int do_devname(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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int ret;
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ret = proc_dostring(table, write, filp, buffer, lenp, ppos);
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if (ret == 0 && write) {
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struct ias_value *val;
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val = irias_new_string_value(sysctl_devname);
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if (val)
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irias_object_change_attribute("Device", "DeviceName", val);
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}
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return ret;
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}
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/* One file */
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static ctl_table irda_table[] = {
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{
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.ctl_name = DISCOVERY,
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.procname = "discovery",
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.data = &sysctl_discovery,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec
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},
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{
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.ctl_name = DEVNAME,
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.procname = "devname",
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.data = sysctl_devname,
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.maxlen = 65,
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.mode = 0644,
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.proc_handler = &do_devname,
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.strategy = &sysctl_string
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},
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#ifdef CONFIG_IRDA_DEBUG
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{
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.ctl_name = DEBUG,
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.procname = "debug",
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.data = &irda_debug,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec
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},
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#endif
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#ifdef CONFIG_IRDA_FAST_RR
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{
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.ctl_name = FAST_POLL,
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.procname = "fast_poll_increase",
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.data = &sysctl_fast_poll_increase,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec
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},
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#endif
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{
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.ctl_name = DISCOVERY_SLOTS,
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.procname = "discovery_slots",
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.data = &sysctl_discovery_slots,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_discovery_slots,
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.extra2 = &max_discovery_slots
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},
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{
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.ctl_name = DISCOVERY_TIMEOUT,
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.procname = "discovery_timeout",
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.data = &sysctl_discovery_timeout,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec
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},
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{
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.ctl_name = SLOT_TIMEOUT,
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.procname = "slot_timeout",
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.data = &sysctl_slot_timeout,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_slot_timeout,
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.extra2 = &max_slot_timeout
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},
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{
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.ctl_name = MAX_BAUD_RATE,
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.procname = "max_baud_rate",
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.data = &sysctl_max_baud_rate,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_max_baud_rate,
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.extra2 = &max_max_baud_rate
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},
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{
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.ctl_name = MIN_TX_TURN_TIME,
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.procname = "min_tx_turn_time",
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.data = &sysctl_min_tx_turn_time,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_min_tx_turn_time,
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.extra2 = &max_min_tx_turn_time
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},
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{
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.ctl_name = MAX_TX_DATA_SIZE,
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.procname = "max_tx_data_size",
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.data = &sysctl_max_tx_data_size,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_max_tx_data_size,
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.extra2 = &max_max_tx_data_size
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},
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{
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.ctl_name = MAX_TX_WINDOW,
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.procname = "max_tx_window",
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.data = &sysctl_max_tx_window,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_max_tx_window,
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.extra2 = &max_max_tx_window
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},
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{
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.ctl_name = MAX_NOREPLY_TIME,
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.procname = "max_noreply_time",
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.data = &sysctl_max_noreply_time,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_max_noreply_time,
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.extra2 = &max_max_noreply_time
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},
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{
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.ctl_name = WARN_NOREPLY_TIME,
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.procname = "warn_noreply_time",
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.data = &sysctl_warn_noreply_time,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_warn_noreply_time,
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.extra2 = &max_warn_noreply_time
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},
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{
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.ctl_name = LAP_KEEPALIVE_TIME,
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.procname = "lap_keepalive_time",
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.data = &sysctl_lap_keepalive_time,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_lap_keepalive_time,
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.extra2 = &max_lap_keepalive_time
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},
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{ .ctl_name = 0 }
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};
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/* One directory */
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static ctl_table irda_net_table[] = {
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{
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.ctl_name = NET_IRDA,
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.procname = "irda",
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.maxlen = 0,
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.mode = 0555,
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.child = irda_table
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},
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{ .ctl_name = 0 }
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};
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/* The parent directory */
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static ctl_table irda_root_table[] = {
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{
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.ctl_name = CTL_NET,
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.procname = "net",
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.maxlen = 0,
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.mode = 0555,
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.child = irda_net_table
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},
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{ .ctl_name = 0 }
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};
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static struct ctl_table_header *irda_table_header;
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/*
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* Function irda_sysctl_register (void)
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*
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* Register our sysctl interface
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*
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*/
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int __init irda_sysctl_register(void)
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{
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irda_table_header = register_sysctl_table(irda_root_table);
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if (!irda_table_header)
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return -ENOMEM;
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return 0;
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}
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/*
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* Function irda_sysctl_unregister (void)
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*
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* Unregister our sysctl interface
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*
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*/
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void __exit irda_sysctl_unregister(void)
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{
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unregister_sysctl_table(irda_table_header);
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}
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