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Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -07001/*
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
Geert Uytterhoevenf26ec5b2009-04-13 14:39:48 -070016#ifdef CONFIG_PROC_SYSCTL
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -070017static 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
Davidlohr Buesof3713fd2014-02-25 15:01:45 -080025static int proc_mq_dointvec(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(&mq_table, write, buffer, lenp, ppos);
33}
34
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -070035static int proc_mq_dointvec_minmax(ctl_table *table, int write,
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070036 void __user *buffer, size_t *lenp, loff_t *ppos)
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -070037{
38 struct ctl_table mq_table;
39 memcpy(&mq_table, table, sizeof(mq_table));
40 mq_table.data = get_mq(table);
41
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070042 return proc_dointvec_minmax(&mq_table, write, buffer,
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -070043 lenp, ppos);
44}
45#else
Davidlohr Buesof3713fd2014-02-25 15:01:45 -080046#define proc_mq_dointvec NULL
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -070047#define proc_mq_dointvec_minmax NULL
48#endif
49
50static int msg_max_limit_min = MIN_MSGMAX;
Doug Ledford93e6f112012-05-31 16:26:28 -070051static int msg_max_limit_max = HARD_MSGMAX;
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -070052
53static int msg_maxsize_limit_min = MIN_MSGSIZEMAX;
Doug Ledford93e6f112012-05-31 16:26:28 -070054static int msg_maxsize_limit_max = HARD_MSGSIZEMAX;
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -070055
56static ctl_table mq_sysctls[] = {
57 {
58 .procname = "queues_max",
59 .data = &init_ipc_ns.mq_queues_max,
60 .maxlen = sizeof(int),
61 .mode = 0644,
Davidlohr Buesof3713fd2014-02-25 15:01:45 -080062 .proc_handler = proc_mq_dointvec,
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -070063 },
64 {
65 .procname = "msg_max",
66 .data = &init_ipc_ns.mq_msg_max,
67 .maxlen = sizeof(int),
68 .mode = 0644,
69 .proc_handler = proc_mq_dointvec_minmax,
70 .extra1 = &msg_max_limit_min,
71 .extra2 = &msg_max_limit_max,
72 },
73 {
74 .procname = "msgsize_max",
75 .data = &init_ipc_ns.mq_msgsize_max,
76 .maxlen = sizeof(int),
77 .mode = 0644,
78 .proc_handler = proc_mq_dointvec_minmax,
79 .extra1 = &msg_maxsize_limit_min,
80 .extra2 = &msg_maxsize_limit_max,
81 },
KOSAKI Motohirocef01842012-05-31 16:26:33 -070082 {
83 .procname = "msg_default",
84 .data = &init_ipc_ns.mq_msg_default,
85 .maxlen = sizeof(int),
86 .mode = 0644,
87 .proc_handler = proc_mq_dointvec_minmax,
88 .extra1 = &msg_max_limit_min,
89 .extra2 = &msg_max_limit_max,
90 },
91 {
92 .procname = "msgsize_default",
93 .data = &init_ipc_ns.mq_msgsize_default,
94 .maxlen = sizeof(int),
95 .mode = 0644,
96 .proc_handler = proc_mq_dointvec_minmax,
97 .extra1 = &msg_maxsize_limit_min,
98 .extra2 = &msg_maxsize_limit_max,
99 },
Eric W. Biederman2bc46572009-04-03 02:51:10 -0700100 {}
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -0700101};
102
103static ctl_table mq_sysctl_dir[] = {
104 {
105 .procname = "mqueue",
106 .mode = 0555,
107 .child = mq_sysctls,
108 },
Eric W. Biederman2bc46572009-04-03 02:51:10 -0700109 {}
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -0700110};
111
112static ctl_table mq_sysctl_root[] = {
113 {
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -0700114 .procname = "fs",
115 .mode = 0555,
116 .child = mq_sysctl_dir,
117 },
Eric W. Biederman2bc46572009-04-03 02:51:10 -0700118 {}
Serge E. Hallynbdc8e5f2009-04-06 19:01:11 -0700119};
120
121struct ctl_table_header *mq_register_sysctl_table(void)
122{
123 return register_sysctl_table(mq_sysctl_root);
124}