2 * Copyright (C) 2007 IBM Corporation
4 * Author: Cedric Le Goater <clg@fr.ibm.com>
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
12 #include <linux/nsproxy.h>
13 #include <linux/ipc_namespace.h>
14 #include <linux/sysctl.h>
16 #ifdef CONFIG_PROC_SYSCTL
17 static void *get_mq(ctl_table *table)
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;
25 static int proc_mq_dointvec_minmax(ctl_table *table, int write,
26 void __user *buffer, size_t *lenp, loff_t *ppos)
28 struct ctl_table mq_table;
29 memcpy(&mq_table, table, sizeof(mq_table));
30 mq_table.data = get_mq(table);
32 return proc_dointvec_minmax(&mq_table, write, buffer,
36 #define proc_mq_dointvec_minmax NULL
39 static int msg_queues_limit_min = MIN_QUEUESMAX;
40 static int msg_queues_limit_max = HARD_QUEUESMAX;
42 static int msg_max_limit_min = MIN_MSGMAX;
43 static int msg_max_limit_max = HARD_MSGMAX;
45 static int msg_maxsize_limit_min = MIN_MSGSIZEMAX;
46 static int msg_maxsize_limit_max = HARD_MSGSIZEMAX;
48 static ctl_table mq_sysctls[] = {
50 .procname = "queues_max",
51 .data = &init_ipc_ns.mq_queues_max,
52 .maxlen = sizeof(int),
54 .proc_handler = proc_mq_dointvec_minmax,
55 .extra1 = &msg_queues_limit_min,
56 .extra2 = &msg_queues_limit_max,
59 .procname = "msg_max",
60 .data = &init_ipc_ns.mq_msg_max,
61 .maxlen = sizeof(int),
63 .proc_handler = proc_mq_dointvec_minmax,
64 .extra1 = &msg_max_limit_min,
65 .extra2 = &msg_max_limit_max,
68 .procname = "msgsize_max",
69 .data = &init_ipc_ns.mq_msgsize_max,
70 .maxlen = sizeof(int),
72 .proc_handler = proc_mq_dointvec_minmax,
73 .extra1 = &msg_maxsize_limit_min,
74 .extra2 = &msg_maxsize_limit_max,
77 .procname = "msg_default",
78 .data = &init_ipc_ns.mq_msg_default,
79 .maxlen = sizeof(int),
81 .proc_handler = proc_mq_dointvec_minmax,
82 .extra1 = &msg_max_limit_min,
83 .extra2 = &msg_max_limit_max,
86 .procname = "msgsize_default",
87 .data = &init_ipc_ns.mq_msgsize_default,
88 .maxlen = sizeof(int),
90 .proc_handler = proc_mq_dointvec_minmax,
91 .extra1 = &msg_maxsize_limit_min,
92 .extra2 = &msg_maxsize_limit_max,
97 static ctl_table mq_sysctl_dir[] = {
106 static ctl_table mq_sysctl_root[] = {
110 .child = mq_sysctl_dir,
115 struct ctl_table_header *mq_register_sysctl_table(void)
117 return register_sysctl_table(mq_sysctl_root);