patch-2.1.32 linux/net/sunrpc/sysctl.c

• Lines: 135
• Date: Mon Mar 3 00:55:59 1997
• Orig file: v2.1.31/linux/net/sunrpc/sysctl.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.31/linux/net/sunrpc/sysctl.c linux/net/sunrpc/sysctl.c
@@ -0,0 +1,134 @@
+/*
+ * linux/net/sunrpc/sysctl.c
+ *
+ * Sysctl interface to sunrpc module. This is for debugging only now.
+ *
+ * I would prefer to register the sunrpc table below sys/net, but that's
+ * impossible at the moment.
+ */
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/linkage.h>
+#include <linux/ctype.h>
+#include <linux/fs.h>
+#include <linux/sysctl.h>
+#if LINUX_VERSION_CODE >= 0x020100
+#include <asm/uaccess.h>
+#else
+# include <linux/mm.h>
+# define copy_from_user		memcpy_fromfs
+# define copy_to_user		memcpy_tofs
+# define access_ok		!verify_area
+#endif
+#include <linux/sunrpc/types.h>
+
+/*
+ * Declare the debug flags here
+ */
+unsigned int	rpc_debug  = 0;
+unsigned int	nfs_debug  = 0;
+unsigned int	nfsd_debug = 0;
+unsigned int	nlm_debug  = 0;
+
+#ifdef RPC_DEBUG
+
+static struct ctl_table_header *sunrpc_table_header = NULL;
+static ctl_table		sunrpc_table[];
+
+void
+rpc_register_sysctl(void)
+{
+	if (sunrpc_table_header)
+		return;
+	sunrpc_table_header = register_sysctl_table(sunrpc_table, 1);
+}
+
+void
+rpc_unregister_sysctl(void)
+{
+	if (!sunrpc_table_header)
+		return;
+	unregister_sysctl_table(sunrpc_table_header);
+}
+
+int
+proc_dodebug(ctl_table *table, int write, struct file *file,
+				void *buffer, size_t *lenp)
+{
+	char		tmpbuf[20], *p, c;
+	unsigned int	value;
+	int		left, len;
+
+	if ((file->f_pos && !write) || !*lenp) {
+		*lenp = 0;
+		return 0;
+	}
+
+	left = *lenp;
+
+	if (write) {
+		if (!access_ok(VERIFY_READ, buffer, left))
+			return -EFAULT;
+		p = (char *) buffer;
+#if LINUX_VERSION_CODE >= 0x020100
+		while (left && __get_user(c, p) >= 0 && isspace(c))
+			left--, p++;
+#else
+		while (left && (c = get_fs_byte(p)) >= 0 && isspace(c))
+			left--, p++;
+#endif
+		if (!left)
+			goto done;
+
+		if (left > sizeof(tmpbuf) - 1)
+			return -EINVAL;
+		copy_from_user(tmpbuf, p, left);
+		tmpbuf[left] = '\0';
+
+		for (p = tmpbuf, value = 0; '0' <= *p && *p <= '9'; p++, left--)
+			value = 10 * value + (*p - '0');
+		if (*p && !isspace(*p))
+			return -EINVAL;
+		while (left && isspace(*p))
+			left--, p++;
+		*(unsigned int *) table->data = value;
+	} else {
+		if (!access_ok(VERIFY_WRITE, buffer, left))
+			return -EFAULT;
+		len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
+		if (len > left)
+			len = left;
+		copy_to_user(buffer, tmpbuf, len);
+		if ((left -= len) > 0) {
+			put_user('\n', (char *)buffer + len);
+			left--;
+		}
+	}
+
+done:
+	*lenp -= left;
+	file->f_pos += *lenp;
+	return 0;
+}
+
+#define DIRENTRY(nam1, nam2, child)	\
+	{CTL_##nam1, #nam2, NULL, 0, 0555, child }
+#define DBGENTRY(nam1, nam2)	\
+	{CTL_##nam1##DEBUG, #nam2 "_debug", &nam2##_debug, sizeof(int),\
+	 0644, NULL, &proc_dodebug}
+
+static ctl_table		debug_table[] = {
+	DBGENTRY(RPC,  rpc),
+	DBGENTRY(NFS,  nfs),
+	DBGENTRY(NFSD, nfsd),
+	DBGENTRY(NLM,  nlm),
+	{0}
+};
+
+static ctl_table		sunrpc_table[] = {
+	DIRENTRY(SUNRPC, sunrpc, debug_table),
+	{0}
+};
+
+#endif