[deliverable/linux.git] / drivers / staging / lustre / lustre / obdclass / linux / linux-sysctl.c

/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 */

#include <linux/module.h>
#include <linux/sysctl.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/bitops.h>
#include <linux/uaccess.h>
#include <linux/utsname.h>

#define DEBUG_SUBSYSTEM S_CLASS

#include "../../include/obd_support.h"
#include "../../include/lprocfs_status.h"

#ifdef CONFIG_SYSCTL
static struct ctl_table_header *obd_table_header;
#endif


#define OBD_SYSCTL 300

enum {
	OBD_TIMEOUT = 3,	/* RPC timeout before recovery/intr */
	OBD_DUMP_ON_TIMEOUT,    /* dump kernel debug log upon eviction */
	OBD_MEMUSED,	    /* bytes currently OBD_ALLOCated */
	OBD_PAGESUSED,	  /* pages currently OBD_PAGE_ALLOCated */
	OBD_MAXMEMUSED,	 /* maximum bytes OBD_ALLOCated concurrently */
	OBD_MAXPAGESUSED,       /* maximum pages OBD_PAGE_ALLOCated concurrently */
	OBD_SYNCFILTER,	 /* XXX temporary, as we play with sync osts.. */
	OBD_LDLM_TIMEOUT,       /* LDLM timeout for ASTs before client eviction */
	OBD_DUMP_ON_EVICTION,   /* dump kernel debug log upon eviction */
	OBD_DEBUG_PEER_ON_TIMEOUT, /* dump peer debug when RPC times out */
	OBD_ALLOC_FAIL_RATE,    /* memory allocation random failure rate */
	OBD_MAX_DIRTY_PAGES,    /* maximum dirty pages */
	OBD_AT_MIN,	     /* Adaptive timeouts params */
	OBD_AT_MAX,
	OBD_AT_EXTRA,
	OBD_AT_EARLY_MARGIN,
	OBD_AT_HISTORY,
};


#ifdef CONFIG_SYSCTL
static int proc_set_timeout(struct ctl_table *table, int write,
			void __user *buffer, size_t *lenp, loff_t *ppos)
{
	int rc;

	rc = proc_dointvec(table, write, buffer, lenp, ppos);
	if (ldlm_timeout >= obd_timeout)
		ldlm_timeout = max(obd_timeout / 3, 1U);
	return rc;
}

static int proc_memory_alloc(struct ctl_table *table, int write,
			void __user *buffer, size_t *lenp, loff_t *ppos)
{
	char buf[22];
	int len;

	if (!*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}
	if (write)
		return -EINVAL;

	len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_sum());
	if (len > *lenp)
		len = *lenp;
	buf[len] = '\0';
	if (copy_to_user(buffer, buf, len))
		return -EFAULT;
	*lenp = len;
	*ppos += *lenp;
	return 0;
}

static int proc_pages_alloc(struct ctl_table *table, int write,
			void __user *buffer, size_t *lenp, loff_t *ppos)
{
	char buf[22];
	int len;

	if (!*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}
	if (write)
		return -EINVAL;

	len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_sum());
	if (len > *lenp)
		len = *lenp;
	buf[len] = '\0';
	if (copy_to_user(buffer, buf, len))
		return -EFAULT;
	*lenp = len;
	*ppos += *lenp;
	return 0;
}

static int proc_mem_max(struct ctl_table *table, int write, void __user *buffer,
		 size_t *lenp, loff_t *ppos)
{
	char buf[22];
	int len;

	if (!*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}
	if (write)
		return -EINVAL;

	len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_max());
	if (len > *lenp)
		len = *lenp;
	buf[len] = '\0';
	if (copy_to_user(buffer, buf, len))
		return -EFAULT;
	*lenp = len;
	*ppos += *lenp;
	return 0;
}

static int proc_pages_max(struct ctl_table *table, int write,
			void __user *buffer, size_t *lenp, loff_t *ppos)
{
	char buf[22];
	int len;

	if (!*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}
	if (write)
		return -EINVAL;

	len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_max());
	if (len > *lenp)
		len = *lenp;
	buf[len] = '\0';
	if (copy_to_user(buffer, buf, len))
		return -EFAULT;
	*lenp = len;
	*ppos += *lenp;
	return 0;
}

static int proc_max_dirty_pages_in_mb(struct ctl_table *table, int write,
			       void __user *buffer, size_t *lenp, loff_t *ppos)
{
	int rc = 0;

	if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}
	if (write) {
		rc = lprocfs_write_frac_helper(buffer, *lenp,
					       (unsigned int *)table->data,
					       1 << (20 - PAGE_CACHE_SHIFT));
		/* Don't allow them to let dirty pages exceed 90% of system
		 * memory and set a hard minimum of 4MB. */
		if (obd_max_dirty_pages > ((totalram_pages / 10) * 9)) {
			CERROR("Refusing to set max dirty pages to %u, which is more than 90%% of available RAM; setting to %lu\n",
			       obd_max_dirty_pages,
			       ((totalram_pages / 10) * 9));
			obd_max_dirty_pages = ((totalram_pages / 10) * 9);
		} else if (obd_max_dirty_pages < 4 << (20 - PAGE_CACHE_SHIFT)) {
			obd_max_dirty_pages = 4 << (20 - PAGE_CACHE_SHIFT);
		}
	} else {
		char buf[21];
		int len;

		len = lprocfs_read_frac_helper(buf, sizeof(buf),
					       *(unsigned int *)table->data,
					       1 << (20 - PAGE_CACHE_SHIFT));
		if (len > *lenp)
			len = *lenp;
		buf[len] = '\0';
		if (copy_to_user(buffer, buf, len))
			return -EFAULT;
		*lenp = len;
	}
	*ppos += *lenp;
	return rc;
}

static int proc_alloc_fail_rate(struct ctl_table *table, int write,
			 void __user *buffer, size_t *lenp, loff_t *ppos)
{
	int rc	  = 0;

	if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}
	if (write) {
		rc = lprocfs_write_frac_helper(buffer, *lenp,
					       (unsigned int *)table->data,
					       OBD_ALLOC_FAIL_MULT);
	} else {
		char buf[21];
		int  len;

		len = lprocfs_read_frac_helper(buf, 21,
					       *(unsigned int *)table->data,
					       OBD_ALLOC_FAIL_MULT);
		if (len > *lenp)
			len = *lenp;
		buf[len] = '\0';
		if (copy_to_user(buffer, buf, len))
			return -EFAULT;
		*lenp = len;
	}
	*ppos += *lenp;
	return rc;
}

static struct ctl_table obd_table[] = {
	{
		.procname = "timeout",
		.data     = &obd_timeout,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_set_timeout
	},
	{
		.procname = "debug_peer_on_timeout",
		.data     = &obd_debug_peer_on_timeout,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_dointvec
	},
	{
		.procname = "dump_on_timeout",
		.data     = &obd_dump_on_timeout,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_dointvec
	},
	{
		.procname = "dump_on_eviction",
		.data     = &obd_dump_on_eviction,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_dointvec
	},
	{
		.procname = "memused",
		.data     = NULL,
		.maxlen   = 0,
		.mode     = 0444,
		.proc_handler = &proc_memory_alloc
	},
	{
		.procname = "pagesused",
		.data     = NULL,
		.maxlen   = 0,
		.mode     = 0444,
		.proc_handler = &proc_pages_alloc
	},
	{
		.procname = "memused_max",
		.data     = NULL,
		.maxlen   = 0,
		.mode     = 0444,
		.proc_handler = &proc_mem_max
	},
	{
		.procname = "pagesused_max",
		.data     = NULL,
		.maxlen   = 0,
		.mode     = 0444,
		.proc_handler = &proc_pages_max
	},
	{
		.procname = "ldlm_timeout",
		.data     = &ldlm_timeout,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_set_timeout
	},
	{
		.procname = "alloc_fail_rate",
		.data     = &obd_alloc_fail_rate,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_alloc_fail_rate
	},
	{
		.procname = "max_dirty_mb",
		.data     = &obd_max_dirty_pages,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_max_dirty_pages_in_mb
	},
	{
		.procname = "at_min",
		.data     = &at_min,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_dointvec,
	},
	{
		.procname = "at_max",
		.data     = &at_max,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_dointvec,
	},
	{
		.procname = "at_extra",
		.data     = &at_extra,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_dointvec,
	},
	{
		.procname = "at_early_margin",
		.data     = &at_early_margin,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_dointvec,
	},
	{
		.procname = "at_history",
		.data     = &at_history,
		.maxlen   = sizeof(int),
		.mode     = 0644,
		.proc_handler = &proc_dointvec,
	},
	{}
};

static struct ctl_table parent_table[] = {
	{
		.procname = "lustre",
		.data     = NULL,
		.maxlen   = 0,
		.mode     = 0555,
		.child    = obd_table
	},
	{}
};
#endif

void obd_sysctl_init(void)
{
#ifdef CONFIG_SYSCTL
	if (!obd_table_header)
		obd_table_header = register_sysctl_table(parent_table);
#endif
}

void obd_sysctl_clean(void)
{
#ifdef CONFIG_SYSCTL
	if (obd_table_header)
		unregister_sysctl_table(obd_table_header);
	obd_table_header = NULL;
#endif
}
Commit	Line	Data
d7e09d03 PT	1	/*
	2	* GPL HEADER START
	3	*
	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License version 2 for more details (a copy is included
	14	* in the LICENSE file that accompanied this code).
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* version 2 along with this program; If not, see
	18	* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
	19	*
	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	21	* CA 95054 USA or visit www.sun.com if you need additional information or
	22	* have any questions.
	23	*
	24	* GPL HEADER END
	25	*/
	26	/*
	27	* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
	28	* Use is subject to license terms.
	29	*
	30	* Copyright (c) 2011, Intel Corporation.
	31	*/
	32	/*
	33	* This file is part of Lustre, http://www.lustre.org/
	34	* Lustre is a trademark of Sun Microsystems, Inc.
	35	*/
	36
	37	#include <linux/module.h>
	38	#include <linux/sysctl.h>
	39	#include <linux/sched.h>
	40	#include <linux/mm.h>
d7e09d03 PT	41	#include <linux/proc_fs.h>
	42	#include <linux/slab.h>
	43	#include <linux/stat.h>
	44	#include <linux/ctype.h>
87822e41 AS	45	#include <linux/bitops.h>
87822e41 AS	46	#include <linux/uaccess.h>
d7e09d03 PT	47	#include <linux/utsname.h>
	48
	49	#define DEBUG_SUBSYSTEM S_CLASS
	50
610f7377 GKH	51	#include "../../include/obd_support.h"
610f7377 GKH	52	#include "../../include/lprocfs_status.h"
d7e09d03 PT	53
d7e09d03 PT	54	#ifdef CONFIG_SYSCTL
71b1fd9c	55	static struct ctl_table_header *obd_table_header;
d7e09d03 PT	56	#endif
	57
	58
	59	#define OBD_SYSCTL 300
	60
	61	enum {
	62	OBD_TIMEOUT = 3, /* RPC timeout before recovery/intr */
	63	OBD_DUMP_ON_TIMEOUT, /* dump kernel debug log upon eviction */
	64	OBD_MEMUSED, /* bytes currently OBD_ALLOCated */
	65	OBD_PAGESUSED, /* pages currently OBD_PAGE_ALLOCated */
	66	OBD_MAXMEMUSED, /* maximum bytes OBD_ALLOCated concurrently */
	67	OBD_MAXPAGESUSED, /* maximum pages OBD_PAGE_ALLOCated concurrently */
	68	OBD_SYNCFILTER, /* XXX temporary, as we play with sync osts.. */
	69	OBD_LDLM_TIMEOUT, /* LDLM timeout for ASTs before client eviction */
	70	OBD_DUMP_ON_EVICTION, /* dump kernel debug log upon eviction */
	71	OBD_DEBUG_PEER_ON_TIMEOUT, /* dump peer debug when RPC times out */
	72	OBD_ALLOC_FAIL_RATE, /* memory allocation random failure rate */
	73	OBD_MAX_DIRTY_PAGES, /* maximum dirty pages */
	74	OBD_AT_MIN, /* Adaptive timeouts params */
	75	OBD_AT_MAX,
	76	OBD_AT_EXTRA,
	77	OBD_AT_EARLY_MARGIN,
	78	OBD_AT_HISTORY,
	79	};
	80
	81
b475d037	82	#ifdef CONFIG_SYSCTL
71b1fd9c AS	83	static int proc_set_timeout(struct ctl_table *table, int write,
71b1fd9c AS	84	void __user buffer, size_t lenp, loff_t *ppos)
d7e09d03 PT	85	{
	86	int rc;
	87
1d3ade00	88	rc = proc_dointvec(table, write, buffer, lenp, ppos);
d7e09d03 PT	89	if (ldlm_timeout >= obd_timeout)
	90	ldlm_timeout = max(obd_timeout / 3, 1U);
	91	return rc;
	92	}
	93
71b1fd9c AS	94	static int proc_memory_alloc(struct ctl_table *table, int write,
71b1fd9c AS	95	void __user buffer, size_t lenp, loff_t *ppos)
d7e09d03 PT	96	{
	97	char buf[22];
	98	int len;
d7e09d03 PT	99
	100	if (!lenp \|\| (ppos && !write)) {
	101	*lenp = 0;
	102	return 0;
	103	}
	104	if (write)
	105	return -EINVAL;
	106
b0f5aad5	107	len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_sum());
d7e09d03 PT	108	if (len > *lenp)
	109	len = *lenp;
	110	buf[len] = '\0';
	111	if (copy_to_user(buffer, buf, len))
	112	return -EFAULT;
	113	*lenp = len;
	114	ppos += lenp;
	115	return 0;
	116	}
	117
71b1fd9c AS	118	static int proc_pages_alloc(struct ctl_table *table, int write,
71b1fd9c AS	119	void __user buffer, size_t lenp, loff_t *ppos)
d7e09d03 PT	120	{
	121	char buf[22];
	122	int len;
d7e09d03 PT	123
	124	if (!lenp \|\| (ppos && !write)) {
	125	*lenp = 0;
	126	return 0;
	127	}
	128	if (write)
	129	return -EINVAL;
	130
b0f5aad5	131	len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_sum());
d7e09d03 PT	132	if (len > *lenp)
	133	len = *lenp;
	134	buf[len] = '\0';
	135	if (copy_to_user(buffer, buf, len))
	136	return -EFAULT;
	137	*lenp = len;
	138	ppos += lenp;
	139	return 0;
	140	}
	141
71b1fd9c	142	static int proc_mem_max(struct ctl_table table, int write, void __user buffer,
3bdb7ce4	143	size_t lenp, loff_t ppos)
d7e09d03 PT	144	{
	145	char buf[22];
	146	int len;
d7e09d03 PT	147
	148	if (!lenp \|\| (ppos && !write)) {
	149	*lenp = 0;
	150	return 0;
	151	}
	152	if (write)
	153	return -EINVAL;
	154
b0f5aad5	155	len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_max());
d7e09d03 PT	156	if (len > *lenp)
	157	len = *lenp;
	158	buf[len] = '\0';
	159	if (copy_to_user(buffer, buf, len))
	160	return -EFAULT;
	161	*lenp = len;
	162	ppos += lenp;
	163	return 0;
	164	}
	165
71b1fd9c AS	166	static int proc_pages_max(struct ctl_table *table, int write,
71b1fd9c AS	167	void __user buffer, size_t lenp, loff_t *ppos)
d7e09d03 PT	168	{
	169	char buf[22];
	170	int len;
d7e09d03 PT	171
	172	if (!lenp \|\| (ppos && !write)) {
	173	*lenp = 0;
	174	return 0;
	175	}
	176	if (write)
	177	return -EINVAL;
	178
b0f5aad5	179	len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_max());
d7e09d03 PT	180	if (len > *lenp)
	181	len = *lenp;
	182	buf[len] = '\0';
	183	if (copy_to_user(buffer, buf, len))
	184	return -EFAULT;
	185	*lenp = len;
	186	ppos += lenp;
	187	return 0;
	188	}
	189
71b1fd9c	190	static int proc_max_dirty_pages_in_mb(struct ctl_table *table, int write,
3bdb7ce4	191	void __user buffer, size_t lenp, loff_t *ppos)
d7e09d03 PT	192	{
d7e09d03 PT	193	int rc = 0;
d7e09d03 PT	194
	195	if (!table->data \|\| !table->maxlen \|\| !lenp \|\| (ppos && !write)) {
	196	*lenp = 0;
	197	return 0;
	198	}
	199	if (write) {
	200	rc = lprocfs_write_frac_helper(buffer, *lenp,
260cdf5d	201	(unsigned int *)table->data,
d7e09d03 PT	202	1 << (20 - PAGE_CACHE_SHIFT));
	203	/* Don't allow them to let dirty pages exceed 90% of system
	204	* memory and set a hard minimum of 4MB. */
4f6cc9ab	205	if (obd_max_dirty_pages > ((totalram_pages / 10) * 9)) {
2d00bd17 JP	206	CERROR("Refusing to set max dirty pages to %u, which is more than 90%% of available RAM; setting to %lu\n",
2d00bd17 JP	207	obd_max_dirty_pages,
4f6cc9ab PT	208	((totalram_pages / 10) * 9));
4f6cc9ab PT	209	obd_max_dirty_pages = ((totalram_pages / 10) * 9);
d7e09d03 PT	210	} else if (obd_max_dirty_pages < 4 << (20 - PAGE_CACHE_SHIFT)) {
	211	obd_max_dirty_pages = 4 << (20 - PAGE_CACHE_SHIFT);
	212	}
	213	} else {
	214	char buf[21];
	215	int len;
	216
	217	len = lprocfs_read_frac_helper(buf, sizeof(buf),
260cdf5d	218	(unsigned int )table->data,
d7e09d03 PT	219	1 << (20 - PAGE_CACHE_SHIFT));
	220	if (len > *lenp)
	221	len = *lenp;
	222	buf[len] = '\0';
	223	if (copy_to_user(buffer, buf, len))
	224	return -EFAULT;
	225	*lenp = len;
	226	}
	227	ppos += lenp;
	228	return rc;
	229	}
	230
71b1fd9c	231	static int proc_alloc_fail_rate(struct ctl_table *table, int write,
3bdb7ce4	232	void __user buffer, size_t lenp, loff_t *ppos)
d7e09d03 PT	233	{
d7e09d03 PT	234	int rc = 0;
d7e09d03 PT	235
	236	if (!table->data \|\| !table->maxlen \|\| !lenp \|\| (ppos && !write)) {
	237	*lenp = 0;
	238	return 0;
	239	}
	240	if (write) {
	241	rc = lprocfs_write_frac_helper(buffer, *lenp,
260cdf5d	242	(unsigned int *)table->data,
d7e09d03 PT	243	OBD_ALLOC_FAIL_MULT);
	244	} else {
	245	char buf[21];
	246	int len;
	247
	248	len = lprocfs_read_frac_helper(buf, 21,
260cdf5d	249	(unsigned int )table->data,
d7e09d03 PT	250	OBD_ALLOC_FAIL_MULT);
	251	if (len > *lenp)
	252	len = *lenp;
	253	buf[len] = '\0';
	254	if (copy_to_user(buffer, buf, len))
	255	return -EFAULT;
	256	*lenp = len;
	257	}
	258	ppos += lenp;
	259	return rc;
	260	}
	261
691bc0eb	262	static struct ctl_table obd_table[] = {
d7e09d03	263	{
d7e09d03 PT	264	.procname = "timeout",
	265	.data = &obd_timeout,
	266	.maxlen = sizeof(int),
	267	.mode = 0644,
	268	.proc_handler = &proc_set_timeout
	269	},
	270	{
d7e09d03 PT	271	.procname = "debug_peer_on_timeout",
	272	.data = &obd_debug_peer_on_timeout,
	273	.maxlen = sizeof(int),
	274	.mode = 0644,
	275	.proc_handler = &proc_dointvec
	276	},
	277	{
d7e09d03 PT	278	.procname = "dump_on_timeout",
	279	.data = &obd_dump_on_timeout,
	280	.maxlen = sizeof(int),
	281	.mode = 0644,
	282	.proc_handler = &proc_dointvec
	283	},
	284	{
d7e09d03 PT	285	.procname = "dump_on_eviction",
	286	.data = &obd_dump_on_eviction,
	287	.maxlen = sizeof(int),
	288	.mode = 0644,
	289	.proc_handler = &proc_dointvec
	290	},
	291	{
d7e09d03 PT	292	.procname = "memused",
	293	.data = NULL,
	294	.maxlen = 0,
	295	.mode = 0444,
	296	.proc_handler = &proc_memory_alloc
	297	},
	298	{
d7e09d03 PT	299	.procname = "pagesused",
	300	.data = NULL,
	301	.maxlen = 0,
	302	.mode = 0444,
	303	.proc_handler = &proc_pages_alloc
	304	},
	305	{
d7e09d03 PT	306	.procname = "memused_max",
	307	.data = NULL,
	308	.maxlen = 0,
	309	.mode = 0444,
	310	.proc_handler = &proc_mem_max
	311	},
	312	{
d7e09d03 PT	313	.procname = "pagesused_max",
	314	.data = NULL,
	315	.maxlen = 0,
	316	.mode = 0444,
	317	.proc_handler = &proc_pages_max
	318	},
	319	{
d7e09d03 PT	320	.procname = "ldlm_timeout",
	321	.data = &ldlm_timeout,
	322	.maxlen = sizeof(int),
	323	.mode = 0644,
	324	.proc_handler = &proc_set_timeout
	325	},
	326	{
d7e09d03 PT	327	.procname = "alloc_fail_rate",
	328	.data = &obd_alloc_fail_rate,
	329	.maxlen = sizeof(int),
	330	.mode = 0644,
	331	.proc_handler = &proc_alloc_fail_rate
	332	},
	333	{
d7e09d03 PT	334	.procname = "max_dirty_mb",
	335	.data = &obd_max_dirty_pages,
	336	.maxlen = sizeof(int),
	337	.mode = 0644,
	338	.proc_handler = &proc_max_dirty_pages_in_mb
	339	},
	340	{
d7e09d03 PT	341	.procname = "at_min",
	342	.data = &at_min,
	343	.maxlen = sizeof(int),
	344	.mode = 0644,
1d3ade00	345	.proc_handler = &proc_dointvec,
d7e09d03 PT	346	},
d7e09d03 PT	347	{
d7e09d03 PT	348	.procname = "at_max",
	349	.data = &at_max,
	350	.maxlen = sizeof(int),
	351	.mode = 0644,
1d3ade00	352	.proc_handler = &proc_dointvec,
d7e09d03 PT	353	},
d7e09d03 PT	354	{
d7e09d03 PT	355	.procname = "at_extra",
	356	.data = &at_extra,
	357	.maxlen = sizeof(int),
	358	.mode = 0644,
1d3ade00	359	.proc_handler = &proc_dointvec,
d7e09d03 PT	360	},
d7e09d03 PT	361	{
d7e09d03 PT	362	.procname = "at_early_margin",
	363	.data = &at_early_margin,
	364	.maxlen = sizeof(int),
	365	.mode = 0644,
1d3ade00	366	.proc_handler = &proc_dointvec,
d7e09d03 PT	367	},
d7e09d03 PT	368	{
d7e09d03 PT	369	.procname = "at_history",
	370	.data = &at_history,
	371	.maxlen = sizeof(int),
	372	.mode = 0644,
1d3ade00	373	.proc_handler = &proc_dointvec,
e780e3de PT	374	},
e780e3de PT	375	{}
d7e09d03 PT	376	};
d7e09d03 PT	377
691bc0eb	378	static struct ctl_table parent_table[] = {
d7e09d03	379	{
d7e09d03 PT	380	.procname = "lustre",
	381	.data = NULL,
	382	.maxlen = 0,
	383	.mode = 0555,
	384	.child = obd_table
e780e3de PT	385	},
e780e3de PT	386	{}
d7e09d03 PT	387	};
	388	#endif
	389
e4f3771f	390	void obd_sysctl_init(void)
d7e09d03 PT	391	{
d7e09d03 PT	392	#ifdef CONFIG_SYSCTL
e4f3771f	393	if (!obd_table_header)
a7f24447	394	obd_table_header = register_sysctl_table(parent_table);
d7e09d03 PT	395	#endif
	396	}
	397
e4f3771f	398	void obd_sysctl_clean(void)
d7e09d03 PT	399	{
d7e09d03 PT	400	#ifdef CONFIG_SYSCTL
e4f3771f	401	if (obd_table_header)
d7e09d03 PT	402	unregister_sysctl_table(obd_table_header);
	403	obd_table_header = NULL;
	404	#endif
	405	}