[linux-2.6-block.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
struct ctl_table_header *obd_table_header = NULL;
#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,
};


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;
}

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;
}

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;
}

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;
}

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;
}

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;
}

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;
}

#ifdef CONFIG_SYSCTL
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
691bc0eb	55	struct ctl_table_header *obd_table_header = NULL;
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
3bdb7ce4 GKH	82	int proc_set_timeout(struct ctl_table table, int write, void __user buffer,
3bdb7ce4 GKH	83	size_t lenp, loff_t ppos)
d7e09d03 PT	84	{
	85	int rc;
	86
1d3ade00	87	rc = proc_dointvec(table, write, buffer, lenp, ppos);
d7e09d03 PT	88	if (ldlm_timeout >= obd_timeout)
	89	ldlm_timeout = max(obd_timeout / 3, 1U);
	90	return rc;
	91	}
	92
3bdb7ce4 GKH	93	int proc_memory_alloc(struct ctl_table table, int write, void __user buffer,
3bdb7ce4 GKH	94	size_t lenp, loff_t ppos)
d7e09d03 PT	95	{
	96	char buf[22];
	97	int len;
d7e09d03 PT	98
	99	if (!lenp \|\| (ppos && !write)) {
	100	*lenp = 0;
	101	return 0;
	102	}
	103	if (write)
	104	return -EINVAL;
	105
b0f5aad5	106	len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_sum());
d7e09d03 PT	107	if (len > *lenp)
	108	len = *lenp;
	109	buf[len] = '\0';
	110	if (copy_to_user(buffer, buf, len))
	111	return -EFAULT;
	112	*lenp = len;
	113	ppos += lenp;
	114	return 0;
	115	}
	116
3bdb7ce4 GKH	117	int proc_pages_alloc(struct ctl_table table, int write, void __user buffer,
3bdb7ce4 GKH	118	size_t lenp, loff_t ppos)
d7e09d03 PT	119	{
	120	char buf[22];
	121	int len;
d7e09d03 PT	122
	123	if (!lenp \|\| (ppos && !write)) {
	124	*lenp = 0;
	125	return 0;
	126	}
	127	if (write)
	128	return -EINVAL;
	129
b0f5aad5	130	len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_sum());
d7e09d03 PT	131	if (len > *lenp)
	132	len = *lenp;
	133	buf[len] = '\0';
	134	if (copy_to_user(buffer, buf, len))
	135	return -EFAULT;
	136	*lenp = len;
	137	ppos += lenp;
	138	return 0;
	139	}
	140
3bdb7ce4 GKH	141	int proc_mem_max(struct ctl_table table, int write, void __user buffer,
3bdb7ce4 GKH	142	size_t lenp, loff_t ppos)
d7e09d03 PT	143	{
	144	char buf[22];
	145	int len;
d7e09d03 PT	146
	147	if (!lenp \|\| (ppos && !write)) {
	148	*lenp = 0;
	149	return 0;
	150	}
	151	if (write)
	152	return -EINVAL;
	153
b0f5aad5	154	len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_max());
d7e09d03 PT	155	if (len > *lenp)
	156	len = *lenp;
	157	buf[len] = '\0';
	158	if (copy_to_user(buffer, buf, len))
	159	return -EFAULT;
	160	*lenp = len;
	161	ppos += lenp;
	162	return 0;
	163	}
	164
3bdb7ce4 GKH	165	int proc_pages_max(struct ctl_table table, int write, void __user buffer,
3bdb7ce4 GKH	166	size_t lenp, loff_t ppos)
d7e09d03 PT	167	{
	168	char buf[22];
	169	int len;
d7e09d03 PT	170
	171	if (!lenp \|\| (ppos && !write)) {
	172	*lenp = 0;
	173	return 0;
	174	}
	175	if (write)
	176	return -EINVAL;
	177
b0f5aad5	178	len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_max());
d7e09d03 PT	179	if (len > *lenp)
	180	len = *lenp;
	181	buf[len] = '\0';
	182	if (copy_to_user(buffer, buf, len))
	183	return -EFAULT;
	184	*lenp = len;
	185	ppos += lenp;
	186	return 0;
	187	}
	188
3bdb7ce4 GKH	189	int proc_max_dirty_pages_in_mb(struct ctl_table *table, int write,
3bdb7ce4 GKH	190	void __user buffer, size_t lenp, loff_t *ppos)
d7e09d03 PT	191	{
d7e09d03 PT	192	int rc = 0;
d7e09d03 PT	193
	194	if (!table->data \|\| !table->maxlen \|\| !lenp \|\| (ppos && !write)) {
	195	*lenp = 0;
	196	return 0;
	197	}
	198	if (write) {
	199	rc = lprocfs_write_frac_helper(buffer, *lenp,
260cdf5d	200	(unsigned int *)table->data,
d7e09d03 PT	201	1 << (20 - PAGE_CACHE_SHIFT));
	202	/* Don't allow them to let dirty pages exceed 90% of system
	203	* memory and set a hard minimum of 4MB. */
4f6cc9ab	204	if (obd_max_dirty_pages > ((totalram_pages / 10) * 9)) {
d7e09d03 PT	205	CERROR("Refusing to set max dirty pages to %u, which "
	206	"is more than 90%% of available RAM; setting "
	207	"to %lu\n", 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
3bdb7ce4 GKH	231	int proc_alloc_fail_rate(struct ctl_table *table, int write,
3bdb7ce4 GKH	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
d7e09d03	262	#ifdef CONFIG_SYSCTL
691bc0eb	263	static struct ctl_table obd_table[] = {
d7e09d03	264	{
d7e09d03 PT	265	.procname = "timeout",
	266	.data = &obd_timeout,
	267	.maxlen = sizeof(int),
	268	.mode = 0644,
	269	.proc_handler = &proc_set_timeout
	270	},
	271	{
d7e09d03 PT	272	.procname = "debug_peer_on_timeout",
	273	.data = &obd_debug_peer_on_timeout,
	274	.maxlen = sizeof(int),
	275	.mode = 0644,
	276	.proc_handler = &proc_dointvec
	277	},
	278	{
d7e09d03 PT	279	.procname = "dump_on_timeout",
	280	.data = &obd_dump_on_timeout,
	281	.maxlen = sizeof(int),
	282	.mode = 0644,
	283	.proc_handler = &proc_dointvec
	284	},
	285	{
d7e09d03 PT	286	.procname = "dump_on_eviction",
	287	.data = &obd_dump_on_eviction,
	288	.maxlen = sizeof(int),
	289	.mode = 0644,
	290	.proc_handler = &proc_dointvec
	291	},
	292	{
d7e09d03 PT	293	.procname = "memused",
	294	.data = NULL,
	295	.maxlen = 0,
	296	.mode = 0444,
	297	.proc_handler = &proc_memory_alloc
	298	},
	299	{
d7e09d03 PT	300	.procname = "pagesused",
	301	.data = NULL,
	302	.maxlen = 0,
	303	.mode = 0444,
	304	.proc_handler = &proc_pages_alloc
	305	},
	306	{
d7e09d03 PT	307	.procname = "memused_max",
	308	.data = NULL,
	309	.maxlen = 0,
	310	.mode = 0444,
	311	.proc_handler = &proc_mem_max
	312	},
	313	{
d7e09d03 PT	314	.procname = "pagesused_max",
	315	.data = NULL,
	316	.maxlen = 0,
	317	.mode = 0444,
	318	.proc_handler = &proc_pages_max
	319	},
	320	{
d7e09d03 PT	321	.procname = "ldlm_timeout",
	322	.data = &ldlm_timeout,
	323	.maxlen = sizeof(int),
	324	.mode = 0644,
	325	.proc_handler = &proc_set_timeout
	326	},
	327	{
d7e09d03 PT	328	.procname = "alloc_fail_rate",
	329	.data = &obd_alloc_fail_rate,
	330	.maxlen = sizeof(int),
	331	.mode = 0644,
	332	.proc_handler = &proc_alloc_fail_rate
	333	},
	334	{
d7e09d03 PT	335	.procname = "max_dirty_mb",
	336	.data = &obd_max_dirty_pages,
	337	.maxlen = sizeof(int),
	338	.mode = 0644,
	339	.proc_handler = &proc_max_dirty_pages_in_mb
	340	},
	341	{
d7e09d03 PT	342	.procname = "at_min",
	343	.data = &at_min,
	344	.maxlen = sizeof(int),
	345	.mode = 0644,
1d3ade00	346	.proc_handler = &proc_dointvec,
d7e09d03 PT	347	},
d7e09d03 PT	348	{
d7e09d03 PT	349	.procname = "at_max",
	350	.data = &at_max,
	351	.maxlen = sizeof(int),
	352	.mode = 0644,
1d3ade00	353	.proc_handler = &proc_dointvec,
d7e09d03 PT	354	},
d7e09d03 PT	355	{
d7e09d03 PT	356	.procname = "at_extra",
	357	.data = &at_extra,
	358	.maxlen = sizeof(int),
	359	.mode = 0644,
1d3ade00	360	.proc_handler = &proc_dointvec,
d7e09d03 PT	361	},
d7e09d03 PT	362	{
d7e09d03 PT	363	.procname = "at_early_margin",
	364	.data = &at_early_margin,
	365	.maxlen = sizeof(int),
	366	.mode = 0644,
1d3ade00	367	.proc_handler = &proc_dointvec,
d7e09d03 PT	368	},
d7e09d03 PT	369	{
d7e09d03 PT	370	.procname = "at_history",
	371	.data = &at_history,
	372	.maxlen = sizeof(int),
	373	.mode = 0644,
1d3ade00	374	.proc_handler = &proc_dointvec,
e780e3de PT	375	},
e780e3de PT	376	{}
d7e09d03 PT	377	};
d7e09d03 PT	378
691bc0eb	379	static struct ctl_table parent_table[] = {
d7e09d03	380	{
d7e09d03 PT	381	.procname = "lustre",
	382	.data = NULL,
	383	.maxlen = 0,
	384	.mode = 0555,
	385	.child = obd_table
e780e3de PT	386	},
e780e3de PT	387	{}
d7e09d03 PT	388	};
	389	#endif
	390
e4f3771f	391	void obd_sysctl_init(void)
d7e09d03 PT	392	{
d7e09d03 PT	393	#ifdef CONFIG_SYSCTL
e4f3771f	394	if (!obd_table_header)
a7f24447	395	obd_table_header = register_sysctl_table(parent_table);
d7e09d03 PT	396	#endif
	397	}
	398
e4f3771f	399	void obd_sysctl_clean(void)
d7e09d03 PT	400	{
d7e09d03 PT	401	#ifdef CONFIG_SYSCTL
e4f3771f	402	if (obd_table_header)
d7e09d03 PT	403	unregister_sysctl_table(obd_table_header);
	404	obd_table_header = NULL;
	405	#endif
	406	}