1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
|
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -2267,6 +2267,8 @@ static const struct file_operations proc
static int __init proc_locks_init(void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
proc_create("locks", 0, NULL, &proc_locks_operations);
return 0;
}
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -67,3 +67,8 @@ config PROC_PAGE_MONITOR
/proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
/proc/kpagecount, and /proc/kpageflags. Disabling these
interfaces will reduce the size of the kernel by approximately 4kb.
+
+config PROC_STRIPPED
+ default n
+ depends on EXPERT
+ bool "Strip non-essential /proc functionality to reduce code size"
--- a/fs/proc/consoles.c
+++ b/fs/proc/consoles.c
@@ -108,6 +108,9 @@ static const struct file_operations proc
static int __init proc_consoles_init(void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
+
proc_create("consoles", 0, NULL, &proc_consoles_operations);
return 0;
}
--- a/fs/proc/proc_tty.c
+++ b/fs/proc/proc_tty.c
@@ -143,7 +143,10 @@ static const struct file_operations proc
void proc_tty_register_driver(struct tty_driver *driver)
{
struct proc_dir_entry *ent;
-
+
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return;
+
if (!driver->driver_name || driver->proc_entry ||
!driver->ops->proc_fops)
return;
@@ -160,6 +163,9 @@ void proc_tty_unregister_driver(struct t
{
struct proc_dir_entry *ent;
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return;
+
ent = driver->proc_entry;
if (!ent)
return;
@@ -174,6 +180,9 @@ void proc_tty_unregister_driver(struct t
*/
void __init proc_tty_init(void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return;
+
if (!proc_mkdir("tty", NULL))
return;
proc_tty_ldisc = proc_mkdir("tty/ldisc", NULL);
--- a/kernel/exec_domain.c
+++ b/kernel/exec_domain.c
@@ -173,6 +173,8 @@ static const struct file_operations exec
static int __init proc_execdomains_init(void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
proc_create("execdomains", 0, NULL, &execdomains_proc_fops);
return 0;
}
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -311,6 +311,9 @@ void register_irq_proc(unsigned int irq,
{
char name [MAX_NAMELEN];
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
+ return;
+
if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip) || desc->dir)
return;
@@ -347,6 +350,9 @@ void unregister_irq_proc(unsigned int ir
{
char name [MAX_NAMELEN];
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
+ return;
+
if (!root_irq_dir || !desc->dir)
return;
#ifdef CONFIG_SMP
@@ -386,6 +392,9 @@ void init_irq_proc(void)
unsigned int irq;
struct irq_desc *desc;
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED) && !IS_ENABLED(CONFIG_SMP))
+ return;
+
/* create /proc/irq */
root_irq_dir = proc_mkdir("irq", NULL);
if (!root_irq_dir)
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -293,6 +293,8 @@ static int __init init_timer_list_procfs
{
struct proc_dir_entry *pe;
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
pe = proc_create("timer_list", 0444, NULL, &timer_list_fops);
if (!pe)
return -ENOMEM;
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2638,6 +2638,8 @@ static const struct file_operations proc
static int __init proc_vmalloc_init(void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations);
return 0;
}
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1238,10 +1238,12 @@ static int __init setup_vmstat(void)
start_cpu_timer(cpu);
#endif
#ifdef CONFIG_PROC_FS
- proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
- proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops);
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
+ proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
+ proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops);
+ proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations);
+ }
proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations);
- proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations);
#endif
return 0;
}
--- a/net/8021q/vlanproc.c
+++ b/net/8021q/vlanproc.c
@@ -127,6 +127,9 @@ void vlan_proc_cleanup(struct net *net)
{
struct vlan_net *vn = net_generic(net, vlan_net_id);
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return;
+
if (vn->proc_vlan_conf)
remove_proc_entry(name_conf, vn->proc_vlan_dir);
@@ -146,6 +149,9 @@ int __net_init vlan_proc_init(struct net
{
struct vlan_net *vn = net_generic(net, vlan_net_id);
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
+
vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net);
if (!vn->proc_vlan_dir)
goto err;
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4588,9 +4588,11 @@ static int __net_init dev_proc_net_init(
if (!proc_net_fops_create(net, "dev", S_IRUGO, &dev_seq_fops))
goto out;
- if (!proc_net_fops_create(net, "softnet_stat", S_IRUGO, &softnet_seq_fops))
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
+ !proc_net_fops_create(net, "softnet_stat", S_IRUGO, &softnet_seq_fops))
goto out_dev;
- if (!proc_net_fops_create(net, "ptype", S_IRUGO, &ptype_seq_fops))
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
+ !proc_net_fops_create(net, "ptype", S_IRUGO, &ptype_seq_fops))
goto out_softnet;
if (wext_proc_init(net))
@@ -4599,9 +4601,11 @@ static int __net_init dev_proc_net_init(
out:
return rc;
out_ptype:
- proc_net_remove(net, "ptype");
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
+ proc_net_remove(net, "ptype");
out_softnet:
- proc_net_remove(net, "softnet_stat");
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED))
+ proc_net_remove(net, "softnet_stat");
out_dev:
proc_net_remove(net, "dev");
goto out;
@@ -4611,8 +4615,10 @@ static void __net_exit dev_proc_net_exit
{
wext_proc_exit(net);
- proc_net_remove(net, "ptype");
- proc_net_remove(net, "softnet_stat");
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
+ proc_net_remove(net, "ptype");
+ proc_net_remove(net, "softnet_stat");
+ }
proc_net_remove(net, "dev");
}
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2837,6 +2837,8 @@ static __net_initdata struct pernet_oper
static int __init proto_init(void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
return register_pernet_subsys(&proto_net_ops);
}
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -2607,10 +2607,12 @@ static const struct file_operations fib_
int __net_init fib_proc_init(struct net *net)
{
- if (!proc_net_fops_create(net, "fib_trie", S_IRUGO, &fib_trie_fops))
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
+ !proc_net_fops_create(net, "fib_trie", S_IRUGO, &fib_trie_fops))
goto out1;
- if (!proc_net_fops_create(net, "fib_triestat", S_IRUGO,
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED) &&
+ !proc_net_fops_create(net, "fib_triestat", S_IRUGO,
&fib_triestat_fops))
goto out2;
@@ -2629,8 +2631,10 @@ out1:
void __net_exit fib_proc_exit(struct net *net)
{
- proc_net_remove(net, "fib_trie");
- proc_net_remove(net, "fib_triestat");
+ if (!IS_ENABLED(CONFIG_PROC_STRIPPED)) {
+ proc_net_remove(net, "fib_trie");
+ proc_net_remove(net, "fib_triestat");
+ }
proc_net_remove(net, "route");
}
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -71,6 +71,10 @@
#define CONFIG_IP_PIMSM 1
#endif
+#ifdef CONFIG_PROC_STRIPPED
+#undef CONFIG_PROC_FS
+#endif
+
struct mr_table {
struct list_head list;
#ifdef CONFIG_NET_NS
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -502,6 +502,9 @@ static __net_initdata struct pernet_oper
int __init ip_misc_proc_init(void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
+
return register_pernet_subsys(&ip_proc_ops);
}
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -427,6 +427,9 @@ static struct pernet_operations ip_rt_pr
static int __init ip_rt_proc_init(void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return 0;
+
return register_pernet_subsys(&ip_rt_proc_ops);
}
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -135,6 +135,9 @@ void __init msg_init(void)
printk(KERN_INFO "msgmni has been set to %d\n",
init_ipc_ns.msg_ctlmni);
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return;
+
ipc_init_proc_interface("sysvipc/msg",
" key msqid perms cbytes qnum lspid lrpid uid gid cuid cgid stime rtime ctime\n",
IPC_MSG_IDS, sysvipc_msg_proc_show);
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -185,6 +185,8 @@ void sem_exit_ns(struct ipc_namespace *n
void __init sem_init (void)
{
sem_init_ns(&init_ipc_ns);
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return;
ipc_init_proc_interface("sysvipc/sem",
" key semid perms nsems uid gid cuid cgid otime ctime\n",
IPC_SEM_IDS, sysvipc_sem_proc_show);
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -115,6 +115,8 @@ pure_initcall(ipc_ns_init);
void __init shm_init (void)
{
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return;
ipc_init_proc_interface("sysvipc/shm",
#if BITS_PER_LONG <= 32
" key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap\n",
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -149,6 +149,9 @@ void __init ipc_init_proc_interface(cons
struct proc_dir_entry *pde;
struct ipc_proc_iface *iface;
+ if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+ return;
+
iface = kmalloc(sizeof(*iface), GFP_KERNEL);
if (!iface)
return;
|
