Git Repo - linux.git/blame_incremental

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Commit	Line	Data
	1	/*
	2	* Copyright (C) 2007 IBM Corporation
	3	*
	4	* Author: Cedric Le Goater <[email protected]>
	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(struct 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(struct 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
	35	static int proc_mq_dointvec_minmax(struct ctl_table *table, int write,
	36	void __user buffer, size_t lenp, loff_t *ppos)
	37	{
	38	struct ctl_table mq_table;
	39	memcpy(&mq_table, table, sizeof(mq_table));
	40	mq_table.data = get_mq(table);
	41
	42	return proc_dointvec_minmax(&mq_table, write, buffer,
	43	lenp, ppos);
	44	}
	45	#else
	46	#define proc_mq_dointvec NULL
	47	#define proc_mq_dointvec_minmax NULL
	48	#endif
	49
	50	static int msg_max_limit_min = MIN_MSGMAX;
	51	static int msg_max_limit_max = HARD_MSGMAX;
	52
	53	static int msg_maxsize_limit_min = MIN_MSGSIZEMAX;
	54	static int msg_maxsize_limit_max = HARD_MSGSIZEMAX;
	55
	56	static struct ctl_table mq_sysctls[] = {
	57	{
	58	.procname = "queues_max",
	59	.data = &init_ipc_ns.mq_queues_max,
	60	.maxlen = sizeof(int),
	61	.mode = 0644,
	62	.proc_handler = proc_mq_dointvec,
	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	},
	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	},
	100	{}
	101	};
	102
	103	static struct ctl_table mq_sysctl_dir[] = {
	104	{
	105	.procname = "mqueue",
	106	.mode = 0555,
	107	.child = mq_sysctls,
	108	},
	109	{}
	110	};
	111
	112	static struct ctl_table mq_sysctl_root[] = {
	113	{
	114	.procname = "fs",
	115	.mode = 0555,
	116	.child = mq_sysctl_dir,
	117	},
	118	{}
	119	};
	120
	121	struct ctl_table_header *mq_register_sysctl_table(void)
	122	{
	123	return register_sysctl_table(mq_sysctl_root);
	124	}