[GitHub/mt8127/android_kernel_alcatel_ttab.git] / ipc / mq_sysctl.c

/*
 *  Copyright (C) 2007 IBM Corporation
 *
 *  Author: Cedric Le Goater <clg@fr.ibm.com>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License as
 *  published by the Free Software Foundation, version 2 of the
 *  License.
 */

#include <linux/nsproxy.h>
#include <linux/ipc_namespace.h>
#include <linux/sysctl.h>

#ifdef CONFIG_PROC_SYSCTL
static void *get_mq(ctl_table *table)
{
	char *which = table->data;
	struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
	which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns;
	return which;
}

static int proc_mq_dointvec(ctl_table *table, int write,
			    void __user *buffer, size_t *lenp, loff_t *ppos)
{
	struct ctl_table mq_table;
	memcpy(&mq_table, table, sizeof(mq_table));
	mq_table.data = get_mq(table);

	return proc_dointvec(&mq_table, write, buffer, lenp, ppos);
}

static int proc_mq_dointvec_minmax(ctl_table *table, int write,
	void __user *buffer, size_t *lenp, loff_t *ppos)
{
	struct ctl_table mq_table;
	memcpy(&mq_table, table, sizeof(mq_table));
	mq_table.data = get_mq(table);

	return proc_dointvec_minmax(&mq_table, write, buffer,
					lenp, ppos);
}
#else
#define proc_mq_dointvec NULL
#define proc_mq_dointvec_minmax NULL
#endif

static int msg_max_limit_min = MIN_MSGMAX;
static int msg_max_limit_max = HARD_MSGMAX;

static int msg_maxsize_limit_min = MIN_MSGSIZEMAX;
static int msg_maxsize_limit_max = HARD_MSGSIZEMAX;

static ctl_table mq_sysctls[] = {
	{
		.procname	= "queues_max",
		.data		= &init_ipc_ns.mq_queues_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_mq_dointvec,
	},
	{
		.procname	= "msg_max",
		.data		= &init_ipc_ns.mq_msg_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_mq_dointvec_minmax,
		.extra1		= &msg_max_limit_min,
		.extra2		= &msg_max_limit_max,
	},
	{
		.procname	= "msgsize_max",
		.data		= &init_ipc_ns.mq_msgsize_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_mq_dointvec_minmax,
		.extra1		= &msg_maxsize_limit_min,
		.extra2		= &msg_maxsize_limit_max,
	},
	{
		.procname	= "msg_default",
		.data		= &init_ipc_ns.mq_msg_default,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_mq_dointvec_minmax,
		.extra1		= &msg_max_limit_min,
		.extra2		= &msg_max_limit_max,
	},
	{
		.procname	= "msgsize_default",
		.data		= &init_ipc_ns.mq_msgsize_default,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_mq_dointvec_minmax,
		.extra1		= &msg_maxsize_limit_min,
		.extra2		= &msg_maxsize_limit_max,
	},
	{}
};

static ctl_table mq_sysctl_dir[] = {
	{
		.procname	= "mqueue",
		.mode		= 0555,
		.child		= mq_sysctls,
	},
	{}
};

static ctl_table mq_sysctl_root[] = {
	{
		.procname	= "fs",
		.mode		= 0555,
		.child		= mq_sysctl_dir,
	},
	{}
};

struct ctl_table_header *mq_register_sysctl_table(void)
{
	return register_sysctl_table(mq_sysctl_root);
}
Commit	Line	Data
bdc8e5f8 SH	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
f26ec5ba	16	#ifdef CONFIG_PROC_SYSCTL
bdc8e5f8 SH	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
3079c1e6 DB	25	static 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
bdc8e5f8	35	static int proc_mq_dointvec_minmax(ctl_table *table, int write,
8d65af78	36	void __user buffer, size_t lenp, loff_t *ppos)
bdc8e5f8 SH	37	{
	38	struct ctl_table mq_table;
	39	memcpy(&mq_table, table, sizeof(mq_table));
	40	mq_table.data = get_mq(table);
	41
8d65af78	42	return proc_dointvec_minmax(&mq_table, write, buffer,
bdc8e5f8 SH	43	lenp, ppos);
	44	}
	45	#else
3079c1e6	46	#define proc_mq_dointvec NULL
bdc8e5f8 SH	47	#define proc_mq_dointvec_minmax NULL
	48	#endif
	49
	50	static int msg_max_limit_min = MIN_MSGMAX;
93e6f119	51	static int msg_max_limit_max = HARD_MSGMAX;
bdc8e5f8 SH	52
bdc8e5f8 SH	53	static int msg_maxsize_limit_min = MIN_MSGSIZEMAX;
93e6f119	54	static int msg_maxsize_limit_max = HARD_MSGSIZEMAX;
bdc8e5f8 SH	55
	56	static ctl_table mq_sysctls[] = {
	57	{
	58	.procname = "queues_max",
	59	.data = &init_ipc_ns.mq_queues_max,
	60	.maxlen = sizeof(int),
	61	.mode = 0644,
3079c1e6	62	.proc_handler = proc_mq_dointvec,
bdc8e5f8 SH	63	},
	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	},
cef0184c KM	82	{
	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	},
2bc4657c	100	{}
bdc8e5f8 SH	101	};
	102
	103	static ctl_table mq_sysctl_dir[] = {
	104	{
	105	.procname = "mqueue",
	106	.mode = 0555,
	107	.child = mq_sysctls,
	108	},
2bc4657c	109	{}
bdc8e5f8 SH	110	};
	111
	112	static ctl_table mq_sysctl_root[] = {
	113	{
bdc8e5f8 SH	114	.procname = "fs",
	115	.mode = 0555,
	116	.child = mq_sysctl_dir,
	117	},
2bc4657c	118	{}
bdc8e5f8 SH	119	};
	120
	121	struct ctl_table_header *mq_register_sysctl_table(void)
	122	{
	123	return register_sysctl_table(mq_sysctl_root);
	124	}