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>
442 lines
10 KiB
C
442 lines
10 KiB
C
/*
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* Thomas Horsten <thh@lasat.com>
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* Copyright (C) 2000 LASAT Networks A/S.
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Routines specific to the LASAT boards
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*/
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#include <linux/types.h>
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#include <asm/lasat/lasat.h>
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#include <linux/module.h>
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#include <linux/sysctl.h>
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#include <linux/stddef.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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#include <linux/net.h>
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#include <linux/inet.h>
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#include <linux/mutex.h>
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#include <asm/uaccess.h>
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#include "sysctl.h"
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#include "ds1603.h"
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static DEFINE_MUTEX(lasat_info_mutex);
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/* Strategy function to write EEPROM after changing string entry */
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int sysctl_lasatstring(ctl_table *table, int *name, int nlen,
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void *oldval, size_t *oldlenp,
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void *newval, size_t newlen)
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{
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int r;
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mutex_lock(&lasat_info_mutex);
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r = sysctl_string(table, name,
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nlen, oldval, oldlenp, newval, newlen);
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if (r < 0) {
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mutex_unlock(&lasat_info_mutex);
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return r;
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}
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if (newval && newlen) {
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lasat_write_eeprom_info();
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}
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mutex_unlock(&lasat_info_mutex);
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return 1;
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}
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/* And the same for proc */
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int proc_dolasatstring(ctl_table *table, int write, struct file *filp,
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void *buffer, size_t *lenp, loff_t *ppos)
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{
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int r;
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mutex_lock(&lasat_info_mutex);
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r = proc_dostring(table, write, filp, buffer, lenp, ppos);
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if ( (!write) || r) {
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mutex_unlock(&lasat_info_mutex);
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return r;
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}
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lasat_write_eeprom_info();
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mutex_unlock(&lasat_info_mutex);
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return 0;
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}
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/* proc function to write EEPROM after changing int entry */
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int proc_dolasatint(ctl_table *table, int write, struct file *filp,
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void *buffer, size_t *lenp, loff_t *ppos)
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{
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int r;
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mutex_lock(&lasat_info_mutex);
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r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
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if ( (!write) || r) {
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mutex_unlock(&lasat_info_mutex);
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return r;
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}
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lasat_write_eeprom_info();
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mutex_unlock(&lasat_info_mutex);
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return 0;
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}
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static int rtctmp;
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#ifdef CONFIG_DS1603
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/* proc function to read/write RealTime Clock */
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int proc_dolasatrtc(ctl_table *table, int write, struct file *filp,
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void *buffer, size_t *lenp, loff_t *ppos)
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{
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int r;
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mutex_lock(&lasat_info_mutex);
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if (!write) {
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rtctmp = ds1603_read();
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/* check for time < 0 and set to 0 */
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if (rtctmp < 0)
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rtctmp = 0;
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}
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r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
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if ( (!write) || r) {
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mutex_unlock(&lasat_info_mutex);
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return r;
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}
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ds1603_set(rtctmp);
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mutex_unlock(&lasat_info_mutex);
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return 0;
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}
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#endif
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/* Sysctl for setting the IP addresses */
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int sysctl_lasat_intvec(ctl_table *table, int *name, int nlen,
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void *oldval, size_t *oldlenp,
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void *newval, size_t newlen)
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{
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int r;
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mutex_lock(&lasat_info_mutex);
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r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
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if (r < 0) {
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mutex_unlock(&lasat_info_mutex);
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return r;
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}
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if (newval && newlen) {
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lasat_write_eeprom_info();
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}
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mutex_unlock(&lasat_info_mutex);
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return 1;
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}
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#ifdef CONFIG_DS1603
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/* Same for RTC */
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int sysctl_lasat_rtc(ctl_table *table, int *name, int nlen,
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void *oldval, size_t *oldlenp,
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void *newval, size_t newlen)
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{
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int r;
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mutex_lock(&lasat_info_mutex);
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rtctmp = ds1603_read();
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if (rtctmp < 0)
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rtctmp = 0;
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r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
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if (r < 0) {
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mutex_unlock(&lasat_info_mutex);
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return r;
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}
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if (newval && newlen) {
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ds1603_set(rtctmp);
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}
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mutex_unlock(&lasat_info_mutex);
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return 1;
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}
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#endif
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#ifdef CONFIG_INET
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static char lasat_bcastaddr[16];
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void update_bcastaddr(void)
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{
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unsigned int ip;
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ip = (lasat_board_info.li_eeprom_info.ipaddr &
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lasat_board_info.li_eeprom_info.netmask) |
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~lasat_board_info.li_eeprom_info.netmask;
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sprintf(lasat_bcastaddr, "%d.%d.%d.%d",
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(ip ) & 0xff,
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(ip >> 8) & 0xff,
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(ip >> 16) & 0xff,
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(ip >> 24) & 0xff);
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}
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static char proc_lasat_ipbuf[32];
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/* Parsing of IP address */
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int proc_lasat_ip(ctl_table *table, int write, struct file *filp,
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void *buffer, size_t *lenp, loff_t *ppos)
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{
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int len;
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unsigned int ip;
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char *p, c;
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if (!table->data || !table->maxlen || !*lenp ||
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(*ppos && !write)) {
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*lenp = 0;
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return 0;
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}
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mutex_lock(&lasat_info_mutex);
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if (write) {
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len = 0;
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p = buffer;
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while (len < *lenp) {
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if(get_user(c, p++)) {
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mutex_unlock(&lasat_info_mutex);
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return -EFAULT;
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}
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if (c == 0 || c == '\n')
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break;
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len++;
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}
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if (len >= sizeof(proc_lasat_ipbuf)-1)
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len = sizeof(proc_lasat_ipbuf) - 1;
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if (copy_from_user(proc_lasat_ipbuf, buffer, len))
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{
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mutex_unlock(&lasat_info_mutex);
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return -EFAULT;
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}
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proc_lasat_ipbuf[len] = 0;
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*ppos += *lenp;
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/* Now see if we can convert it to a valid IP */
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ip = in_aton(proc_lasat_ipbuf);
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*(unsigned int *)(table->data) = ip;
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lasat_write_eeprom_info();
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} else {
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ip = *(unsigned int *)(table->data);
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sprintf(proc_lasat_ipbuf, "%d.%d.%d.%d",
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(ip ) & 0xff,
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(ip >> 8) & 0xff,
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(ip >> 16) & 0xff,
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(ip >> 24) & 0xff);
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len = strlen(proc_lasat_ipbuf);
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if (len > *lenp)
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len = *lenp;
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if (len)
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if(copy_to_user(buffer, proc_lasat_ipbuf, len)) {
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mutex_unlock(&lasat_info_mutex);
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return -EFAULT;
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}
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if (len < *lenp) {
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if(put_user('\n', ((char *) buffer) + len)) {
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mutex_unlock(&lasat_info_mutex);
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return -EFAULT;
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}
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len++;
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}
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*lenp = len;
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*ppos += len;
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}
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update_bcastaddr();
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mutex_unlock(&lasat_info_mutex);
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return 0;
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}
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#endif /* defined(CONFIG_INET) */
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static int sysctl_lasat_eeprom_value(ctl_table *table, int *name, int nlen,
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void *oldval, size_t *oldlenp,
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void *newval, size_t newlen)
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{
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int r;
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mutex_lock(&lasat_info_mutex);
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r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
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if (r < 0) {
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mutex_unlock(&lasat_info_mutex);
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return r;
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}
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if (newval && newlen)
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{
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if (name && *name == LASAT_PRID)
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lasat_board_info.li_eeprom_info.prid = *(int*)newval;
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lasat_write_eeprom_info();
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lasat_init_board_info();
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}
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mutex_unlock(&lasat_info_mutex);
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return 0;
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}
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int proc_lasat_eeprom_value(ctl_table *table, int write, struct file *filp,
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void *buffer, size_t *lenp, loff_t *ppos)
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{
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int r;
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mutex_lock(&lasat_info_mutex);
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r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
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if ( (!write) || r) {
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mutex_unlock(&lasat_info_mutex);
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return r;
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}
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if (filp && filp->f_path.dentry)
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{
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if (!strcmp(filp->f_path.dentry->d_name.name, "prid"))
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lasat_board_info.li_eeprom_info.prid = lasat_board_info.li_prid;
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if (!strcmp(filp->f_path.dentry->d_name.name, "debugaccess"))
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lasat_board_info.li_eeprom_info.debugaccess = lasat_board_info.li_debugaccess;
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}
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lasat_write_eeprom_info();
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mutex_unlock(&lasat_info_mutex);
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return 0;
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}
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extern int lasat_boot_to_service;
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#ifdef CONFIG_SYSCTL
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static ctl_table lasat_table[] = {
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "cpu-hz",
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.data = &lasat_board_info.li_cpu_hz,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "bus-hz",
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.data = &lasat_board_info.li_bus_hz,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "bmid",
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.data = &lasat_board_info.li_bmid,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = &proc_dointvec,
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.strategy = &sysctl_intvec
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "prid",
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.data = &lasat_board_info.li_prid,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_lasat_eeprom_value,
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.strategy = &sysctl_lasat_eeprom_value
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},
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#ifdef CONFIG_INET
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "ipaddr",
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.data = &lasat_board_info.li_eeprom_info.ipaddr,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_lasat_ip,
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.strategy = &sysctl_lasat_intvec
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},
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{
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.ctl_name = LASAT_NETMASK,
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.procname = "netmask",
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.data = &lasat_board_info.li_eeprom_info.netmask,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_lasat_ip,
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.strategy = &sysctl_lasat_intvec
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "bcastaddr",
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.data = &lasat_bcastaddr,
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.maxlen = sizeof(lasat_bcastaddr),
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.mode = 0600,
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.proc_handler = &proc_dostring,
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.strategy = &sysctl_string
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},
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#endif
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "passwd_hash",
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.data = &lasat_board_info.li_eeprom_info.passwd_hash,
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.maxlen = sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
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.mode = 0600,
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.proc_handler = &proc_dolasatstring,
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.strategy = &sysctl_lasatstring
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "boot-service",
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.data = &lasat_boot_to_service,
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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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.strategy = &sysctl_intvec
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},
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#ifdef CONFIG_DS1603
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "rtc",
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.data = &rtctmp,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dolasatrtc,
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.strategy = &sysctl_lasat_rtc
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},
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#endif
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "namestr",
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.data = &lasat_board_info.li_namestr,
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.maxlen = sizeof(lasat_board_info.li_namestr),
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.mode = 0444,
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.proc_handler = &proc_dostring,
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.strategy = &sysctl_string
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "typestr",
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.data = &lasat_board_info.li_typestr,
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.maxlen = sizeof(lasat_board_info.li_typestr),
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.mode = 0444,
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.proc_handler = &proc_dostring,
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.strategy = &sysctl_string
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},
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{}
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};
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static ctl_table lasat_root_table[] = {
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "lasat",
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.mode = 0555,
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.child = lasat_table
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},
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{}
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};
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static int __init lasat_register_sysctl(void)
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{
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struct ctl_table_header *lasat_table_header;
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lasat_table_header =
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register_sysctl_table(lasat_root_table);
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return 0;
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}
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__initcall(lasat_register_sysctl);
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#endif /* CONFIG_SYSCTL */
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