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Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/net/sunrpc/sysctl.c | |
4 | * | |
5 | * Sysctl interface to sunrpc module. | |
6 | * | |
7 | * I would prefer to register the sunrpc table below sys/net, but that's | |
8 | * impossible at the moment. | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | #include <linux/types.h> |
12 | #include <linux/linkage.h> | |
13 | #include <linux/ctype.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/sysctl.h> | |
16 | #include <linux/module.h> | |
17 | ||
7c0f6ba6 | 18 | #include <linux/uaccess.h> |
1da177e4 LT |
19 | #include <linux/sunrpc/types.h> |
20 | #include <linux/sunrpc/sched.h> | |
21 | #include <linux/sunrpc/stats.h> | |
dc9a16e4 | 22 | #include <linux/sunrpc/svc_xprt.h> |
1da177e4 | 23 | |
70abc49b SK |
24 | #include "netns.h" |
25 | ||
1da177e4 LT |
26 | /* |
27 | * Declare the debug flags here | |
28 | */ | |
29 | unsigned int rpc_debug; | |
e8914c65 | 30 | EXPORT_SYMBOL_GPL(rpc_debug); |
a6eaf8bd | 31 | |
1da177e4 | 32 | unsigned int nfs_debug; |
e8914c65 | 33 | EXPORT_SYMBOL_GPL(nfs_debug); |
a6eaf8bd | 34 | |
1da177e4 | 35 | unsigned int nfsd_debug; |
e8914c65 | 36 | EXPORT_SYMBOL_GPL(nfsd_debug); |
a6eaf8bd | 37 | |
1da177e4 | 38 | unsigned int nlm_debug; |
e8914c65 | 39 | EXPORT_SYMBOL_GPL(nlm_debug); |
1da177e4 | 40 | |
f895b252 | 41 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
1da177e4 LT |
42 | |
43 | static struct ctl_table_header *sunrpc_table_header; | |
fe2c6338 | 44 | static struct ctl_table sunrpc_table[]; |
1da177e4 LT |
45 | |
46 | void | |
47 | rpc_register_sysctl(void) | |
48 | { | |
2b1bec5f | 49 | if (!sunrpc_table_header) |
0b4d4147 | 50 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
1da177e4 LT |
51 | } |
52 | ||
53 | void | |
54 | rpc_unregister_sysctl(void) | |
55 | { | |
56 | if (sunrpc_table_header) { | |
57 | unregister_sysctl_table(sunrpc_table_header); | |
58 | sunrpc_table_header = NULL; | |
59 | } | |
60 | } | |
61 | ||
fe2c6338 | 62 | static int proc_do_xprt(struct ctl_table *table, int write, |
32927393 | 63 | void *buffer, size_t *lenp, loff_t *ppos) |
dc9a16e4 TT |
64 | { |
65 | char tmpbuf[256]; | |
ae297504 | 66 | ssize_t len; |
27df6f25 | 67 | |
d435c05a | 68 | if (write || *ppos) { |
dc9a16e4 TT |
69 | *lenp = 0; |
70 | return 0; | |
71 | } | |
27df6f25 | 72 | len = svc_print_xprts(tmpbuf, sizeof(tmpbuf)); |
ae297504 | 73 | len = memory_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len); |
c09f56b8 | 74 | |
ae297504 | 75 | if (len < 0) { |
c09f56b8 AM |
76 | *lenp = 0; |
77 | return -EINVAL; | |
78 | } | |
ae297504 | 79 | *lenp = len; |
c09f56b8 | 80 | return 0; |
dc9a16e4 TT |
81 | } |
82 | ||
1da177e4 | 83 | static int |
32927393 CH |
84 | proc_dodebug(struct ctl_table *table, int write, void *buffer, size_t *lenp, |
85 | loff_t *ppos) | |
1da177e4 | 86 | { |
32927393 CH |
87 | char tmpbuf[20], *s = NULL; |
88 | char *p; | |
1da177e4 LT |
89 | unsigned int value; |
90 | size_t left, len; | |
91 | ||
92 | if ((*ppos && !write) || !*lenp) { | |
93 | *lenp = 0; | |
94 | return 0; | |
95 | } | |
96 | ||
97 | left = *lenp; | |
98 | ||
99 | if (write) { | |
1da177e4 | 100 | p = buffer; |
32927393 CH |
101 | while (left && isspace(*p)) { |
102 | left--; | |
103 | p++; | |
104 | } | |
1da177e4 LT |
105 | if (!left) |
106 | goto done; | |
107 | ||
108 | if (left > sizeof(tmpbuf) - 1) | |
109 | return -EINVAL; | |
32927393 | 110 | memcpy(tmpbuf, p, left); |
1da177e4 LT |
111 | tmpbuf[left] = '\0'; |
112 | ||
941c3ff3 KM |
113 | value = simple_strtol(tmpbuf, &s, 0); |
114 | if (s) { | |
115 | left -= (s - tmpbuf); | |
116 | if (left && !isspace(*s)) | |
117 | return -EINVAL; | |
ca65a280 JP |
118 | while (left && isspace(*s)) { |
119 | left--; | |
120 | s++; | |
121 | } | |
941c3ff3 KM |
122 | } else |
123 | left = 0; | |
1da177e4 LT |
124 | *(unsigned int *) table->data = value; |
125 | /* Display the RPC tasks on writing to rpc_debug */ | |
bc2a3f86 | 126 | if (strcmp(table->procname, "rpc_debug") == 0) |
70abc49b | 127 | rpc_show_tasks(&init_net); |
1da177e4 | 128 | } else { |
941c3ff3 | 129 | len = sprintf(tmpbuf, "0x%04x", *(unsigned int *) table->data); |
1da177e4 LT |
130 | if (len > left) |
131 | len = left; | |
32927393 | 132 | memcpy(buffer, tmpbuf, len); |
1da177e4 | 133 | if ((left -= len) > 0) { |
32927393 | 134 | *((char *)buffer + len) = '\n'; |
1da177e4 LT |
135 | left--; |
136 | } | |
137 | } | |
138 | ||
139 | done: | |
140 | *lenp -= left; | |
141 | *ppos += *lenp; | |
142 | return 0; | |
143 | } | |
144 | ||
a246b010 | 145 | |
fe2c6338 | 146 | static struct ctl_table debug_table[] = { |
1da177e4 | 147 | { |
1da177e4 LT |
148 | .procname = "rpc_debug", |
149 | .data = &rpc_debug, | |
150 | .maxlen = sizeof(int), | |
151 | .mode = 0644, | |
6d456111 | 152 | .proc_handler = proc_dodebug |
cca5172a | 153 | }, |
1da177e4 | 154 | { |
1da177e4 LT |
155 | .procname = "nfs_debug", |
156 | .data = &nfs_debug, | |
157 | .maxlen = sizeof(int), | |
158 | .mode = 0644, | |
6d456111 | 159 | .proc_handler = proc_dodebug |
cca5172a | 160 | }, |
1da177e4 | 161 | { |
1da177e4 LT |
162 | .procname = "nfsd_debug", |
163 | .data = &nfsd_debug, | |
164 | .maxlen = sizeof(int), | |
165 | .mode = 0644, | |
6d456111 | 166 | .proc_handler = proc_dodebug |
cca5172a | 167 | }, |
1da177e4 | 168 | { |
1da177e4 LT |
169 | .procname = "nlm_debug", |
170 | .data = &nlm_debug, | |
171 | .maxlen = sizeof(int), | |
172 | .mode = 0644, | |
6d456111 | 173 | .proc_handler = proc_dodebug |
cca5172a | 174 | }, |
dc9a16e4 TT |
175 | { |
176 | .procname = "transports", | |
177 | .maxlen = 256, | |
178 | .mode = 0444, | |
6d456111 | 179 | .proc_handler = proc_do_xprt, |
dc9a16e4 | 180 | }, |
f8572d8f | 181 | { } |
1da177e4 LT |
182 | }; |
183 | ||
fe2c6338 | 184 | static struct ctl_table sunrpc_table[] = { |
1da177e4 | 185 | { |
1da177e4 LT |
186 | .procname = "sunrpc", |
187 | .mode = 0555, | |
188 | .child = debug_table | |
189 | }, | |
f8572d8f | 190 | { } |
1da177e4 LT |
191 | }; |
192 | ||
193 | #endif |