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(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(&mq_table
, write
, buffer
, lenp
, ppos
);
35 static int proc_mq_dointvec_minmax(ctl_table
*table
, int write
,
36 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
38 struct ctl_table mq_table
;
39 memcpy(&mq_table
, table
, sizeof(mq_table
));
40 mq_table
.data
= get_mq(table
);
42 return proc_dointvec_minmax(&mq_table
, write
, buffer
,
46 #define proc_mq_dointvec NULL
47 #define proc_mq_dointvec_minmax NULL
50 static int msg_max_limit_min
= MIN_MSGMAX
;
51 static int msg_max_limit_max
= HARD_MSGMAX
;
53 static int msg_maxsize_limit_min
= MIN_MSGSIZEMAX
;
54 static int msg_maxsize_limit_max
= HARD_MSGSIZEMAX
;
56 static ctl_table mq_sysctls
[] = {
58 .procname
= "queues_max",
59 .data
= &init_ipc_ns
.mq_queues_max
,
60 .maxlen
= sizeof(int),
62 .proc_handler
= proc_mq_dointvec
,
65 .procname
= "msg_max",
66 .data
= &init_ipc_ns
.mq_msg_max
,
67 .maxlen
= sizeof(int),
69 .proc_handler
= proc_mq_dointvec_minmax
,
70 .extra1
= &msg_max_limit_min
,
71 .extra2
= &msg_max_limit_max
,
74 .procname
= "msgsize_max",
75 .data
= &init_ipc_ns
.mq_msgsize_max
,
76 .maxlen
= sizeof(int),
78 .proc_handler
= proc_mq_dointvec_minmax
,
79 .extra1
= &msg_maxsize_limit_min
,
80 .extra2
= &msg_maxsize_limit_max
,
83 .procname
= "msg_default",
84 .data
= &init_ipc_ns
.mq_msg_default
,
85 .maxlen
= sizeof(int),
87 .proc_handler
= proc_mq_dointvec_minmax
,
88 .extra1
= &msg_max_limit_min
,
89 .extra2
= &msg_max_limit_max
,
92 .procname
= "msgsize_default",
93 .data
= &init_ipc_ns
.mq_msgsize_default
,
94 .maxlen
= sizeof(int),
96 .proc_handler
= proc_mq_dointvec_minmax
,
97 .extra1
= &msg_maxsize_limit_min
,
98 .extra2
= &msg_maxsize_limit_max
,
103 static ctl_table mq_sysctl_dir
[] = {
105 .procname
= "mqueue",
112 static ctl_table mq_sysctl_root
[] = {
116 .child
= mq_sysctl_dir
,
121 struct ctl_table_header
*mq_register_sysctl_table(void)
123 return register_sysctl_table(mq_sysctl_root
);
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