sysctl.c

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/*
 * Thomas Horsten <[email protected]>
 * Copyright (C) 2000 LASAT Networks A/S.
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Routines specific to the LASAT boards
 */
#include <linux/types.h>
#include <asm/lasat/lasat.h>

#include <linux/module.h>
#include <linux/sysctl.h>
#include <linux/stddef.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/net.h>
#include <linux/inet.h>
#include <linux/uaccess.h>

#include <asm/time.h>

#ifdef CONFIG_DS1603
#include "ds1603.h"
#endif


/* And the same for proc */
int proc_dolasatstring(ctl_table *table, int write,
               void *buffer, size_t *lenp, loff_t *ppos)
{
    int r;

    r = proc_dostring(table, write, buffer, lenp, ppos);
    if ((!write) || r)
        return r;

    lasat_write_eeprom_info();

    return 0;
}

/* proc function to write EEPROM after changing int entry */
int proc_dolasatint(ctl_table *table, int write,
               void *buffer, size_t *lenp, loff_t *ppos)
{
    int r;

    r = proc_dointvec(table, write, buffer, lenp, ppos);
    if ((!write) || r)
        return r;

    lasat_write_eeprom_info();

    return 0;
}

#ifdef CONFIG_DS1603
static int rtctmp;

/* proc function to read/write RealTime Clock */
int proc_dolasatrtc(ctl_table *table, int write,
               void *buffer, size_t *lenp, loff_t *ppos)
{
    struct timespec ts;
    int r;

    if (!write) {
        read_persistent_clock(&ts);
        rtctmp = ts.tv_sec;
        /* check for time < 0 and set to 0 */
        if (rtctmp < 0)
            rtctmp = 0;
    }
    r = proc_dointvec(table, write, buffer, lenp, ppos);
    if (r)
        return r;

    if (write)
        rtc_mips_set_mmss(rtctmp);

    return 0;
}
#endif

#ifdef CONFIG_INET
int proc_lasat_ip(ctl_table *table, int write,
               void *buffer, size_t *lenp, loff_t *ppos)
{
    unsigned int ip;
    char *p, c;
    int len;
    char ipbuf[32];

    if (!table->data || !table->maxlen || !*lenp ||
        (*ppos && !write)) {
        *lenp = 0;
        return 0;
    }

    if (write) {
        len = 0;
        p = buffer;
        while (len < *lenp) {
            if (get_user(c, p++))
                return -EFAULT;
            if (c == 0 || c == '\n')
                break;
            len++;
        }
        if (len >= sizeof(ipbuf)-1)
            len = sizeof(ipbuf) - 1;
        if (copy_from_user(ipbuf, buffer, len))
            return -EFAULT;
        ipbuf[len] = 0;
        *ppos += *lenp;
        /* Now see if we can convert it to a valid IP */
        ip = in_aton(ipbuf);
        *(unsigned int *)(table->data) = ip;
        lasat_write_eeprom_info();
    } else {
        ip = *(unsigned int *)(table->data);
        sprintf(ipbuf, "%d.%d.%d.%d",
            (ip)       & 0xff,
            (ip >>  8) & 0xff,
            (ip >> 16) & 0xff,
            (ip >> 24) & 0xff);
        len = strlen(ipbuf);
        if (len > *lenp)
            len = *lenp;
        if (len)
            if (copy_to_user(buffer, ipbuf, len))
                return -EFAULT;
        if (len < *lenp) {
            if (put_user('\n', ((char *) buffer) + len))
                return -EFAULT;
            len++;
        }
        *lenp = len;
        *ppos += len;
    }

    return 0;
}
#endif

int proc_lasat_prid(ctl_table *table, int write,
               void *buffer, size_t *lenp, loff_t *ppos)
{
    int r;

    r = proc_dointvec(table, write, buffer, lenp, ppos);
    if (r < 0)
        return r;
    if (write) {
        lasat_board_info.li_eeprom_info.prid =
            lasat_board_info.li_prid;
        lasat_write_eeprom_info();
        lasat_init_board_info();
    }
    return 0;
}

extern int lasat_boot_to_service;

static ctl_table lasat_table[] = {
    {
        .procname   = "cpu-hz",
        .data       = &lasat_board_info.li_cpu_hz,
        .maxlen     = sizeof(int),
        .mode       = 0444,
        .proc_handler   = proc_dointvec,
    },
    {
        .procname   = "bus-hz",
        .data       = &lasat_board_info.li_bus_hz,
        .maxlen     = sizeof(int),
        .mode       = 0444,
        .proc_handler   = proc_dointvec,
    },
    {
        .procname   = "bmid",
        .data       = &lasat_board_info.li_bmid,
        .maxlen     = sizeof(int),
        .mode       = 0444,
        .proc_handler   = proc_dointvec,
    },
    {
        .procname   = "prid",
        .data       = &lasat_board_info.li_prid,
        .maxlen     = sizeof(int),
        .mode       = 0644,
        .proc_handler   = proc_lasat_prid,
    },
#ifdef CONFIG_INET
    {
        .procname   = "ipaddr",
        .data       = &lasat_board_info.li_eeprom_info.ipaddr,
        .maxlen     = sizeof(int),
        .mode       = 0644,
        .proc_handler   = proc_lasat_ip,
    },
    {
        .procname   = "netmask",
        .data       = &lasat_board_info.li_eeprom_info.netmask,
        .maxlen     = sizeof(int),
        .mode       = 0644,
        .proc_handler   = proc_lasat_ip,
    },
#endif
    {
        .procname   = "passwd_hash",
        .data       = &lasat_board_info.li_eeprom_info.passwd_hash,
        .maxlen     =
            sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
        .mode       = 0600,
        .proc_handler   = proc_dolasatstring,
    },
    {
        .procname   = "boot-service",
        .data       = &lasat_boot_to_service,
        .maxlen     = sizeof(int),
        .mode       = 0644,
        .proc_handler   = proc_dointvec,
    },
#ifdef CONFIG_DS1603
    {
        .procname   = "rtc",
        .data       = &rtctmp,
        .maxlen     = sizeof(int),
        .mode       = 0644,
        .proc_handler   = proc_dolasatrtc,
    },
#endif
    {
        .procname   = "namestr",
        .data       = &lasat_board_info.li_namestr,
        .maxlen     = sizeof(lasat_board_info.li_namestr),
        .mode       = 0444,
        .proc_handler   = proc_dostring,
    },
    {
        .procname   = "typestr",
        .data       = &lasat_board_info.li_typestr,
        .maxlen     = sizeof(lasat_board_info.li_typestr),
        .mode       = 0444,
        .proc_handler   = proc_dostring,
    },
    {}
};

static ctl_table lasat_root_table[] = {
    {
        .procname   = "lasat",
        .mode       =  0555,
        .child      = lasat_table
    },
    {}
};

static int __init lasat_register_sysctl(void)
{
    struct ctl_table_header *lasat_table_header;

    lasat_table_header =
        register_sysctl_table(lasat_root_table);
    if (!lasat_table_header) {
        printk(KERN_ERR "Unable to register LASAT sysctl\n");
        return -ENOMEM;
    }

    return 0;
}

__initcall(lasat_register_sysctl);