1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/net/sunrpc/sysctl.c
5 * Sysctl interface to sunrpc module.
7 * I would prefer to register the sunrpc table below sys/net, but that's
8 * impossible at the moment.
11 #include <linux/types.h>
12 #include <linux/linkage.h>
13 #include <linux/ctype.h>
15 #include <linux/sysctl.h>
16 #include <linux/module.h>
18 #include <linux/uaccess.h>
19 #include <linux/sunrpc/types.h>
20 #include <linux/sunrpc/sched.h>
21 #include <linux/sunrpc/stats.h>
22 #include <linux/sunrpc/svc_xprt.h>
27 * Declare the debug flags here
29 unsigned int rpc_debug;
30 EXPORT_SYMBOL_GPL(rpc_debug);
32 unsigned int nfs_debug;
33 EXPORT_SYMBOL_GPL(nfs_debug);
35 unsigned int nfsd_debug;
36 EXPORT_SYMBOL_GPL(nfsd_debug);
38 unsigned int nlm_debug;
39 EXPORT_SYMBOL_GPL(nlm_debug);
41 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
43 static struct ctl_table_header *sunrpc_table_header;
44 static struct ctl_table sunrpc_table[];
47 rpc_register_sysctl(void)
49 if (!sunrpc_table_header)
50 sunrpc_table_header = register_sysctl_table(sunrpc_table);
54 rpc_unregister_sysctl(void)
56 if (sunrpc_table_header) {
57 unregister_sysctl_table(sunrpc_table_header);
58 sunrpc_table_header = NULL;
62 static int proc_do_xprt(struct ctl_table *table, int write,
63 void __user *buffer, size_t *lenp, loff_t *ppos)
68 if ((*ppos && !write) || !*lenp) {
72 len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
73 return simple_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len);
77 proc_dodebug(struct ctl_table *table, int write,
78 void __user *buffer, size_t *lenp, loff_t *ppos)
80 char tmpbuf[20], c, *s = NULL;
85 if ((*ppos && !write) || !*lenp) {
93 if (!access_ok(buffer, left))
96 while (left && __get_user(c, p) >= 0 && isspace(c))
101 if (left > sizeof(tmpbuf) - 1)
103 if (copy_from_user(tmpbuf, p, left))
107 value = simple_strtol(tmpbuf, &s, 0);
109 left -= (s - tmpbuf);
110 if (left && !isspace(*s))
112 while (left && isspace(*s))
116 *(unsigned int *) table->data = value;
117 /* Display the RPC tasks on writing to rpc_debug */
118 if (strcmp(table->procname, "rpc_debug") == 0)
119 rpc_show_tasks(&init_net);
121 len = sprintf(tmpbuf, "0x%04x", *(unsigned int *) table->data);
124 if (copy_to_user(buffer, tmpbuf, len))
126 if ((left -= len) > 0) {
127 if (put_user('\n', (char __user *)buffer + len))
140 static struct ctl_table debug_table[] = {
142 .procname = "rpc_debug",
144 .maxlen = sizeof(int),
146 .proc_handler = proc_dodebug
149 .procname = "nfs_debug",
151 .maxlen = sizeof(int),
153 .proc_handler = proc_dodebug
156 .procname = "nfsd_debug",
158 .maxlen = sizeof(int),
160 .proc_handler = proc_dodebug
163 .procname = "nlm_debug",
165 .maxlen = sizeof(int),
167 .proc_handler = proc_dodebug
170 .procname = "transports",
173 .proc_handler = proc_do_xprt,
178 static struct ctl_table sunrpc_table[] = {
180 .procname = "sunrpc",