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1 | /* |
2 | * Copyright (C) 2007 IBM Corporation |
3 | * |
4 | * Author: Cedric Le Goater <clg@fr.ibm.com> |
5 | * |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License as |
8 | * published by the Free Software Foundation, version 2 of the |
9 | * License. |
10 | */ |
11 | |
12 | #include <linux/nsproxy.h> |
13 | #include <linux/ipc_namespace.h> |
14 | #include <linux/sysctl.h> |
15 | |
16 | #ifdef CONFIG_PROC_SYSCTL |
17 | static void *get_mq(ctl_table *table) |
18 | { |
19 | char *which = table->data; |
20 | struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns; |
21 | which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns; |
22 | return which; |
23 | } |
24 | |
25 | static int proc_mq_dointvec_minmax(ctl_table *table, int write, |
26 | void __user *buffer, size_t *lenp, loff_t *ppos) |
27 | { |
28 | struct ctl_table mq_table; |
29 | memcpy(&mq_table, table, sizeof(mq_table)); |
30 | mq_table.data = get_mq(table); |
31 | |
32 | return proc_dointvec_minmax(&mq_table, write, buffer, |
33 | lenp, ppos); |
34 | } |
35 | #else |
36 | #define proc_mq_dointvec_minmax NULL |
37 | #endif |
38 | |
39 | static int msg_queues_limit_min = MIN_QUEUESMAX; |
40 | static int msg_queues_limit_max = HARD_QUEUESMAX; |
41 | |
42 | static int msg_max_limit_min = MIN_MSGMAX; |
43 | static int msg_max_limit_max = HARD_MSGMAX; |
44 | |
45 | static int msg_maxsize_limit_min = MIN_MSGSIZEMAX; |
46 | static int msg_maxsize_limit_max = HARD_MSGSIZEMAX; |
47 | |
48 | static ctl_table mq_sysctls[] = { |
49 | { |
50 | .procname = "queues_max", |
51 | .data = &init_ipc_ns.mq_queues_max, |
52 | .maxlen = sizeof(int), |
53 | .mode = 0644, |
54 | .proc_handler = proc_mq_dointvec_minmax, |
55 | .extra1 = &msg_queues_limit_min, |
56 | .extra2 = &msg_queues_limit_max, |
57 | }, |
58 | { |
59 | .procname = "msg_max", |
60 | .data = &init_ipc_ns.mq_msg_max, |
61 | .maxlen = sizeof(int), |
62 | .mode = 0644, |
63 | .proc_handler = proc_mq_dointvec_minmax, |
64 | .extra1 = &msg_max_limit_min, |
65 | .extra2 = &msg_max_limit_max, |
66 | }, |
67 | { |
68 | .procname = "msgsize_max", |
69 | .data = &init_ipc_ns.mq_msgsize_max, |
70 | .maxlen = sizeof(int), |
71 | .mode = 0644, |
72 | .proc_handler = proc_mq_dointvec_minmax, |
73 | .extra1 = &msg_maxsize_limit_min, |
74 | .extra2 = &msg_maxsize_limit_max, |
75 | }, |
76 | { |
77 | .procname = "msg_default", |
78 | .data = &init_ipc_ns.mq_msg_default, |
79 | .maxlen = sizeof(int), |
80 | .mode = 0644, |
81 | .proc_handler = proc_mq_dointvec_minmax, |
82 | .extra1 = &msg_max_limit_min, |
83 | .extra2 = &msg_max_limit_max, |
84 | }, |
85 | { |
86 | .procname = "msgsize_default", |
87 | .data = &init_ipc_ns.mq_msgsize_default, |
88 | .maxlen = sizeof(int), |
89 | .mode = 0644, |
90 | .proc_handler = proc_mq_dointvec_minmax, |
91 | .extra1 = &msg_maxsize_limit_min, |
92 | .extra2 = &msg_maxsize_limit_max, |
93 | }, |
94 | {} |
95 | }; |
96 | |
97 | static ctl_table mq_sysctl_dir[] = { |
98 | { |
99 | .procname = "mqueue", |
100 | .mode = 0555, |
101 | .child = mq_sysctls, |
102 | }, |
103 | {} |
104 | }; |
105 | |
106 | static ctl_table mq_sysctl_root[] = { |
107 | { |
108 | .procname = "fs", |
109 | .mode = 0555, |
110 | .child = mq_sysctl_dir, |
111 | }, |
112 | {} |
113 | }; |
114 | |
115 | struct ctl_table_header *mq_register_sysctl_table(void) |
116 | { |
117 | return register_sysctl_table(mq_sysctl_root); |
118 | } |
119 |
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