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/*
* Sysctl operations for Coda filesystem
* Original version: (C) 1996 P. Braam and M. Callahan
* Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
*
* Carnegie Mellon encourages users to contribute improvements to
* the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
*/
/* sysctl entries for Coda! */
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/swapctl.h>
#include <linux/proc_fs.h>
#include <linux/malloc.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <asm/bitops.h>
#include <asm/segment.h>
#include <asm/uaccess.h>
#include <linux/utsname.h>
#include <linux/coda.h>
#include <linux/coda_linux.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_psdev.h>
#include <linux/coda_cache.h>
#include <linux/coda_proc.h>
extern int coda_debug;
/* extern int cfsnc_use; */
extern int coda_print_entry;
/* extern int cfsnc_flushme; */
extern int cfsnc_procsize;
/* extern void cfsnc_flush(void); */
void coda_sysctl_init(void);
void coda_sysctl_clean(void);
int coda_dointvec(ctl_table *table, int write, struct file *filp,
void *buffer, size_t *lenp);
struct ctl_table_header *fs_table_header, *coda_table_header;
#define FS_CODA 1 /* Coda file system */
#define CODA_DEBUG 1 /* control debugging */
#define CODA_ENTRY 2 /* control enter/leave pattern */
#define CODA_TIMEOUT 3 /* timeout on upcalls to become intrble */
#define CODA_MC 4 /* use/do not use the access cache */
#define CODA_HARD 5 /* mount type "hard" or "soft" */
#define CODA_VFS 6 /* vfs statistics */
#define CODA_UPCALL 7 /* upcall statistics */
#define CODA_PERMISSION 8 /* permission statistics */
#define CODA_CACHE_INV 9 /* cache invalidation statistics */
static ctl_table coda_table[] = {
{CODA_DEBUG, "debug", &coda_debug, sizeof(int), 0644, NULL, &coda_dointvec},
{CODA_ENTRY, "printentry", &coda_print_entry, sizeof(int), 0644, NULL, &coda_dointvec},
{CODA_MC, "accesscache", &coda_access_cache, sizeof(int), 0644, NULL, &coda_dointvec},
{CODA_TIMEOUT, "timeout", &coda_timeout, sizeof(int), 0644, NULL, &coda_dointvec},
{CODA_HARD, "hard", &coda_hard, sizeof(int), 0644, NULL, &coda_dointvec},
{CODA_VFS, "vfs_stats", NULL, 0, 0644, NULL, &do_reset_coda_vfs_stats},
{CODA_UPCALL, "upcall_stats", NULL, 0, 0644, NULL, &do_reset_coda_upcall_stats},
{CODA_PERMISSION, "permission_stats", NULL, 0, 0644, NULL, &do_reset_coda_permission_stats},
{CODA_CACHE_INV, "cache_inv_stats", NULL, 0, 0644, NULL, &do_reset_coda_cache_inv_stats},
{ 0 }
};
static ctl_table fs_table[] = {
{FS_CODA, "coda", NULL, 0, 0555, coda_table},
{0}
};
void coda_sysctl_init()
{
fs_table_header = register_sysctl_table(fs_table, 0);
/* coda_table_header = register_sysctl_table(coda_table, 0);*/
}
void coda_sysctl_clean() {
/*unregister_sysctl_table(coda_table_header);*/
unregister_sysctl_table(fs_table_header);
}
int coda_dointvec(ctl_table *table, int write, struct file *filp,
void *buffer, size_t *lenp)
{
int *i, vleft, first=1, len, left, neg, val;
#define TMPBUFLEN 20
char buf[TMPBUFLEN], *p;
if (!table->data || !table->maxlen || !*lenp ||
(filp->f_pos && !write)) {
*lenp = 0;
return 0;
}
i = (int *) table->data;
vleft = table->maxlen / sizeof(int);
left = *lenp;
for (; left && vleft--; i++, first=0) {
if (write) {
while (left) {
char c;
if(get_user(c,(char *) buffer))
return -EFAULT;
if (!isspace(c))
break;
left--;
((char *) buffer)++;
}
if (!left)
break;
neg = 0;
len = left;
if (len > TMPBUFLEN-1)
len = TMPBUFLEN-1;
if (copy_from_user(buf, buffer, len))
return -EFAULT;
buf[len] = 0;
p = buf;
if (*p == '-' && left > 1) {
neg = 1;
left--, p++;
}
if (*p < '0' || *p > '9')
break;
val = simple_strtoul(p, &p, 0);
len = p-buf;
if ((len < left) && *p && !isspace(*p))
break;
if (neg)
val = -val;
buffer += len;
left -= len;
*i = val;
} else {
p = buf;
if (!first)
*p++ = '\t';
sprintf(p, "%d", *i);
len = strlen(buf);
if (len > left)
len = left;
if (copy_to_user(buffer, buf, len))
return -EFAULT;
left -= len;
buffer += len;
}
}
if (!write && !first && left) {
if(put_user('\n', (char *) buffer))
return -EFAULT;
left--, buffer++;
}
if (write) {
p = (char *) buffer;
while (left) {
char c;
if(get_user(c, p++))
return -EFAULT;
if (!isspace(c))
break;
left--;
}
}
if (write && first)
return -EINVAL;
*lenp -= left;
filp->f_pos += *lenp;
return 0;
}
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