521c2a43b2
Commit baa3a2a0d2, by removing initialization
of the ctl_name field, broke this conditional, preventing the display of
rpc_tasks that you previously got when turning on rpc debugging.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
156 lines
3 KiB
C
156 lines
3 KiB
C
/*
|
|
* linux/net/sunrpc/sysctl.c
|
|
*
|
|
* Sysctl interface to sunrpc module.
|
|
*
|
|
* I would prefer to register the sunrpc table below sys/net, but that's
|
|
* impossible at the moment.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <linux/sunrpc/types.h>
|
|
#include <linux/sunrpc/sched.h>
|
|
#include <linux/sunrpc/stats.h>
|
|
|
|
/*
|
|
* Declare the debug flags here
|
|
*/
|
|
unsigned int rpc_debug;
|
|
unsigned int nfs_debug;
|
|
unsigned int nfsd_debug;
|
|
unsigned int nlm_debug;
|
|
|
|
#ifdef RPC_DEBUG
|
|
|
|
static struct ctl_table_header *sunrpc_table_header;
|
|
static ctl_table sunrpc_table[];
|
|
|
|
void
|
|
rpc_register_sysctl(void)
|
|
{
|
|
if (!sunrpc_table_header)
|
|
sunrpc_table_header = register_sysctl_table(sunrpc_table);
|
|
}
|
|
|
|
void
|
|
rpc_unregister_sysctl(void)
|
|
{
|
|
if (sunrpc_table_header) {
|
|
unregister_sysctl_table(sunrpc_table_header);
|
|
sunrpc_table_header = NULL;
|
|
}
|
|
}
|
|
|
|
static int
|
|
proc_dodebug(ctl_table *table, int write, struct file *file,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
char tmpbuf[20], c, *s;
|
|
char __user *p;
|
|
unsigned int value;
|
|
size_t left, len;
|
|
|
|
if ((*ppos && !write) || !*lenp) {
|
|
*lenp = 0;
|
|
return 0;
|
|
}
|
|
|
|
left = *lenp;
|
|
|
|
if (write) {
|
|
if (!access_ok(VERIFY_READ, buffer, left))
|
|
return -EFAULT;
|
|
p = buffer;
|
|
while (left && __get_user(c, p) >= 0 && isspace(c))
|
|
left--, p++;
|
|
if (!left)
|
|
goto done;
|
|
|
|
if (left > sizeof(tmpbuf) - 1)
|
|
return -EINVAL;
|
|
if (copy_from_user(tmpbuf, p, left))
|
|
return -EFAULT;
|
|
tmpbuf[left] = '\0';
|
|
|
|
for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--)
|
|
value = 10 * value + (*s - '0');
|
|
if (*s && !isspace(*s))
|
|
return -EINVAL;
|
|
while (left && isspace(*s))
|
|
left--, s++;
|
|
*(unsigned int *) table->data = value;
|
|
/* Display the RPC tasks on writing to rpc_debug */
|
|
if (strcmp(table->procname, "rpc_debug") == 0)
|
|
rpc_show_tasks();
|
|
} else {
|
|
if (!access_ok(VERIFY_WRITE, buffer, left))
|
|
return -EFAULT;
|
|
len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
|
|
if (len > left)
|
|
len = left;
|
|
if (__copy_to_user(buffer, tmpbuf, len))
|
|
return -EFAULT;
|
|
if ((left -= len) > 0) {
|
|
if (put_user('\n', (char __user *)buffer + len))
|
|
return -EFAULT;
|
|
left--;
|
|
}
|
|
}
|
|
|
|
done:
|
|
*lenp -= left;
|
|
*ppos += *lenp;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static ctl_table debug_table[] = {
|
|
{
|
|
.procname = "rpc_debug",
|
|
.data = &rpc_debug,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dodebug
|
|
},
|
|
{
|
|
.procname = "nfs_debug",
|
|
.data = &nfs_debug,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dodebug
|
|
},
|
|
{
|
|
.procname = "nfsd_debug",
|
|
.data = &nfsd_debug,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dodebug
|
|
},
|
|
{
|
|
.procname = "nlm_debug",
|
|
.data = &nlm_debug,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dodebug
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
static ctl_table sunrpc_table[] = {
|
|
{
|
|
.ctl_name = CTL_SUNRPC,
|
|
.procname = "sunrpc",
|
|
.mode = 0555,
|
|
.child = debug_table
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
#endif
|