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* 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 <asm/bitops.h>
#include <asm/uaccess.h>
#include <linux/utsname.h>
#define DEBUG_SUBSYSTEM S_CLASS
#include <obd_support.h>
#include <lprocfs_status.h>
#ifdef CONFIG_SYSCTL
ctl_table_header_t *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 LL_PROC_PROTO(proc_set_timeout)
{
int rc;
rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
if (ldlm_timeout >= obd_timeout)
ldlm_timeout = max(obd_timeout / 3, 1U);
return rc;
}
int LL_PROC_PROTO(proc_memory_alloc)
{
char buf[22];
int len;
DECLARE_LL_PROC_PPOS_DECL;
if (!*lenp || (*ppos && !write)) {
*lenp = 0;
return 0;
}
if (write)
return -EINVAL;
len = snprintf(buf, sizeof(buf), LPU64"\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 LL_PROC_PROTO(proc_pages_alloc)
{
char buf[22];
int len;
DECLARE_LL_PROC_PPOS_DECL;
if (!*lenp || (*ppos && !write)) {
*lenp = 0;
return 0;
}
if (write)
return -EINVAL;
len = snprintf(buf, sizeof(buf), LPU64"\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 LL_PROC_PROTO(proc_mem_max)
{
char buf[22];
int len;
DECLARE_LL_PROC_PPOS_DECL;
if (!*lenp || (*ppos && !write)) {
*lenp = 0;
return 0;
}
if (write)
return -EINVAL;
len = snprintf(buf, sizeof(buf), LPU64"\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 LL_PROC_PROTO(proc_pages_max)
{
char buf[22];
int len;
DECLARE_LL_PROC_PPOS_DECL;
if (!*lenp || (*ppos && !write)) {
*lenp = 0;
return 0;
}
if (write)
return -EINVAL;
len = snprintf(buf, sizeof(buf), LPU64"\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 LL_PROC_PROTO(proc_max_dirty_pages_in_mb)
{
int rc = 0;
DECLARE_LL_PROC_PPOS_DECL;
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 LL_PROC_PROTO(proc_alloc_fail_rate)
{
int rc = 0;
DECLARE_LL_PROC_PPOS_DECL;
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;
}
int LL_PROC_PROTO(proc_at_min)
{
return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
}
int LL_PROC_PROTO(proc_at_max)
{
return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
}
int LL_PROC_PROTO(proc_at_extra)
{
return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
}
int LL_PROC_PROTO(proc_at_early_margin)
{
return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
}
int LL_PROC_PROTO(proc_at_history)
{
return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
}
#ifdef CONFIG_SYSCTL
static ctl_table_t 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_at_min
},
{
.procname = "at_max",
.data = &at_max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_at_max
},
{
.procname = "at_extra",
.data = &at_extra,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_at_extra
},
{
.procname = "at_early_margin",
.data = &at_early_margin,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_at_early_margin
},
{
.procname = "at_history",
.data = &at_history,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_at_history
},
{}
};
static ctl_table_t 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
}
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