static int
cmm_pages_handler(ctl_table *ctl, int write, struct file *filp,
void *buffer, size_t *lenp)
{
char buf[16], *p;
long pages;
int len;
if (!*lenp || (filp->f_pos && !write)) {
*lenp = 0;
return 0;
}
if (write) {
len = *lenp;
if (copy_from_user(buf, buffer,
len > sizeof(buf) ? sizeof(buf) : len))
return -EFAULT;
buf[sizeof(buf) - 1] = '\0';
cmm_skip_blanks(buf, &p);
pages = cmm_strtoul(p, &p);
if (ctl == &cmm_table[0])
cmm_set_pages(pages);
else
cmm_add_timed_pages(pages);
} else {
if (ctl == &cmm_table[0])
pages = cmm_get_pages();
else
pages = cmm_get_timed_pages();
len = sprintf(buf, "%ld\n", pages);
if (len > *lenp)
len = *lenp;
if (copy_to_user(buffer, buf, len))
return -EFAULT;
}
*lenp = len;
filp->f_pos += len;
return 0;
}
static int
cmm_pages_handler(ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
char buf[16], *p;
long nr;
int len;
if (!*lenp || (*ppos && !write)) {
*lenp = 0;
return 0;
}
if (write) {
len = *lenp;
if (copy_from_user(buf, buffer,
len > sizeof(buf) ? sizeof(buf) : len))
return -EFAULT;
buf[sizeof(buf) - 1] = '\0';
cmm_skip_blanks(buf, &p);
nr = simple_strtoul(p, &p, 0);
if (ctl == &cmm_table[0])
cmm_set_pages(nr);
else
cmm_add_timed_pages(nr);
} else {
if (ctl == &cmm_table[0])
nr = cmm_get_pages();
else
nr = cmm_get_timed_pages();
len = sprintf(buf, "%ld\n", nr);
if (len > *lenp)
len = *lenp;
if (copy_to_user(buffer, buf, len))
return -EFAULT;
}
*lenp = len;
*ppos += len;
return 0;
}