4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #include <linux/module.h>
34 #include <linux/sysctl.h>
35 #include <linux/sched.h>
37 #include <linux/sysctl.h>
38 #include <linux/version.h>
39 #include <linux/proc_fs.h>
40 #include <linux/slab.h>
41 #include <linux/stat.h>
42 #include <linux/ctype.h>
43 #include <asm/bitops.h>
44 #include <asm/uaccess.h>
45 #include <linux/utsname.h>
47 #define DEBUG_SUBSYSTEM S_CLASS
49 #include <obd_support.h>
50 #include <lprocfs_status.h>
51 #include <obd_class.h>
54 static struct ctl_table_header *obd_table_header;
57 struct static_lustre_uintvalue_attr {
59 struct attribute attr;
60 ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
62 ssize_t (*store)(struct kobject *kobj, struct attribute *attr,
63 const char *buf, size_t len);
68 static ssize_t static_uintvalue_show(struct kobject *kobj,
69 struct attribute *attr,
72 struct static_lustre_uintvalue_attr *lattr = (void *)attr;
74 return sprintf(buf, "%d\n", *lattr->value);
77 static ssize_t static_uintvalue_store(struct kobject *kobj,
78 struct attribute *attr,
79 const char *buffer, size_t count)
81 struct static_lustre_uintvalue_attr *lattr = (void *)attr;
85 rc = kstrtouint(buffer, 10, &val);
94 #define LUSTRE_STATIC_UINT_ATTR(name, value) \
95 static struct static_lustre_uintvalue_attr lustre_sattr_##name = \
97 static_uintvalue_show, \
98 static_uintvalue_store),\
101 LUSTRE_STATIC_UINT_ATTR(timeout, &obd_timeout);
105 proc_memory_alloc(struct ctl_table *table, int write, void __user *buffer,
106 size_t *lenp, loff_t *ppos)
111 if (!*lenp || (*ppos && !write)) {
118 len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_sum());
122 if (copy_to_user(buffer, buf, len))
130 proc_mem_max(struct ctl_table *table, int write, void __user *buffer,
131 size_t *lenp, loff_t *ppos)
136 if (!*lenp || (*ppos && !write)) {
143 len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_max());
147 if (copy_to_user(buffer, buf, len))
153 #endif /* CONFIG_SYSCTL */
155 static ssize_t max_dirty_mb_show(struct kobject *kobj, struct attribute *attr,
158 return sprintf(buf, "%lu\n",
159 obd_max_dirty_pages / (1 << (20 - PAGE_SHIFT)));
162 static ssize_t max_dirty_mb_store(struct kobject *kobj, struct attribute *attr,
163 const char *buffer, size_t count)
168 rc = kstrtoul(buffer, 10, &val);
172 val *= 1 << (20 - PAGE_SHIFT); /* convert to pages */
174 if (val > ((totalram_pages / 10) * 9)) {
175 /* Somebody wants to assign too much memory to dirty pages */
179 if (val < 4 << (20 - PAGE_SHIFT)) {
180 /* Less than 4 Mb for dirty cache is also bad */
184 obd_max_dirty_pages = val;
188 LUSTRE_RW_ATTR(max_dirty_mb);
190 LUSTRE_STATIC_UINT_ATTR(debug_peer_on_timeout, &obd_debug_peer_on_timeout);
191 LUSTRE_STATIC_UINT_ATTR(dump_on_timeout, &obd_dump_on_timeout);
192 LUSTRE_STATIC_UINT_ATTR(dump_on_eviction, &obd_dump_on_eviction);
193 LUSTRE_STATIC_UINT_ATTR(at_min, &at_min);
194 LUSTRE_STATIC_UINT_ATTR(at_max, &at_max);
195 LUSTRE_STATIC_UINT_ATTR(at_extra, &at_extra);
196 LUSTRE_STATIC_UINT_ATTR(at_early_margin, &at_early_margin);
197 LUSTRE_STATIC_UINT_ATTR(at_history, &at_history);
199 #ifdef HAVE_SERVER_SUPPORT
200 LUSTRE_STATIC_UINT_ATTR(ldlm_timeout, &ldlm_timeout);
204 static struct ctl_table obd_table[] = {
207 .procname = "memused",
211 .proc_handler = &proc_memory_alloc
215 .procname = "memused_max",
219 .proc_handler = &proc_mem_max
223 .procname = "bulk_timeout",
224 .data = &bulk_timeout,
225 .maxlen = sizeof(int),
227 .proc_handler = &proc_dointvec
232 static struct ctl_table parent_table[] = {
235 .procname = "lustre",
245 static struct attribute *lustre_attrs[] = {
246 &lustre_sattr_timeout.u.attr,
247 &lustre_attr_max_dirty_mb.attr,
248 &lustre_sattr_debug_peer_on_timeout.u.attr,
249 &lustre_sattr_dump_on_timeout.u.attr,
250 &lustre_sattr_dump_on_eviction.u.attr,
251 &lustre_sattr_at_min.u.attr,
252 &lustre_sattr_at_max.u.attr,
253 &lustre_sattr_at_extra.u.attr,
254 &lustre_sattr_at_early_margin.u.attr,
255 &lustre_sattr_at_history.u.attr,
256 #ifdef HAVE_SERVER_SUPPORT
257 &lustre_sattr_ldlm_timeout.u.attr,
262 static struct attribute_group lustre_attr_group = {
263 .attrs = lustre_attrs,
266 int obd_sysctl_init(void)
269 if ( !obd_table_header )
270 obd_table_header = register_sysctl_table(parent_table);
272 return sysfs_create_group(lustre_kobj, &lustre_attr_group);
275 void obd_sysctl_clean (void)
278 if ( obd_table_header )
279 unregister_sysctl_table(obd_table_header);
280 obd_table_header = NULL;