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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/slab.h> |
42 | #include <linux/stat.h> | |
43 | #include <linux/ctype.h> | |
87822e41 AS |
44 | #include <linux/bitops.h> |
45 | #include <linux/uaccess.h> | |
d7e09d03 PT |
46 | #include <linux/utsname.h> |
47 | ||
48 | #define DEBUG_SUBSYSTEM S_CLASS | |
49 | ||
610f7377 GKH |
50 | #include "../../include/obd_support.h" |
51 | #include "../../include/lprocfs_status.h" | |
d7e09d03 PT |
52 | |
53 | #ifdef CONFIG_SYSCTL | |
71b1fd9c | 54 | static struct ctl_table_header *obd_table_header; |
d7e09d03 PT |
55 | #endif |
56 | ||
e2424a12 OD |
57 | struct static_lustre_uintvalue_attr { |
58 | struct { | |
59 | struct attribute attr; | |
60 | ssize_t (*show)(struct kobject *kobj, struct attribute *attr, | |
61 | char *buf); | |
62 | ssize_t (*store)(struct kobject *kobj, struct attribute *attr, | |
63 | const char *buf, size_t len); | |
64 | } u; | |
65 | int *value; | |
66 | }; | |
67 | ||
68 | static ssize_t static_uintvalue_show(struct kobject *kobj, | |
69 | struct attribute *attr, | |
70 | char *buf) | |
d7e09d03 | 71 | { |
e2424a12 OD |
72 | struct static_lustre_uintvalue_attr *lattr = (void *)attr; |
73 | ||
74 | return sprintf(buf, "%d\n", *lattr->value); | |
75 | } | |
76 | ||
77 | static ssize_t static_uintvalue_store(struct kobject *kobj, | |
78 | struct attribute *attr, | |
79 | const char *buffer, size_t count) | |
80 | { | |
81 | struct static_lustre_uintvalue_attr *lattr = (void *)attr; | |
d7e09d03 | 82 | int rc; |
e2424a12 | 83 | unsigned int val; |
d7e09d03 | 84 | |
e2424a12 OD |
85 | rc = kstrtouint(buffer, 10, &val); |
86 | if (rc) | |
87 | return rc; | |
88 | ||
89 | *lattr->value = val; | |
90 | ||
91 | return count; | |
d7e09d03 PT |
92 | } |
93 | ||
e2424a12 OD |
94 | #define LUSTRE_STATIC_UINT_ATTR(name, value) \ |
95 | static struct static_lustre_uintvalue_attr lustre_sattr_##name = \ | |
96 | {__ATTR(name, 0644, \ | |
97 | static_uintvalue_show, \ | |
98 | static_uintvalue_store),\ | |
99 | value } | |
100 | ||
101 | LUSTRE_STATIC_UINT_ATTR(timeout, &obd_timeout); | |
102 | ||
df476a4d OD |
103 | static ssize_t max_dirty_mb_show(struct kobject *kobj, struct attribute *attr, |
104 | char *buf) | |
d7e09d03 | 105 | { |
df476a4d OD |
106 | return sprintf(buf, "%ul\n", |
107 | obd_max_dirty_pages / (1 << (20 - PAGE_CACHE_SHIFT))); | |
108 | } | |
109 | ||
110 | static ssize_t max_dirty_mb_store(struct kobject *kobj, struct attribute *attr, | |
111 | const char *buffer, size_t count) | |
112 | { | |
113 | int rc; | |
114 | unsigned long val; | |
115 | ||
116 | rc = kstrtoul(buffer, 10, &val); | |
117 | if (rc) | |
118 | return rc; | |
119 | ||
120 | val *= 1 << (20 - PAGE_CACHE_SHIFT); /* convert to pages */ | |
d7e09d03 | 121 | |
df476a4d OD |
122 | if (val > ((totalram_pages / 10) * 9)) { |
123 | /* Somebody wants to assign too much memory to dirty pages */ | |
124 | return -EINVAL; | |
d7e09d03 | 125 | } |
df476a4d OD |
126 | |
127 | if (val < 4 << (20 - PAGE_CACHE_SHIFT)) { | |
128 | /* Less than 4 Mb for dirty cache is also bad */ | |
129 | return -EINVAL; | |
d7e09d03 | 130 | } |
df476a4d OD |
131 | |
132 | obd_max_dirty_pages = val; | |
133 | ||
134 | return count; | |
d7e09d03 | 135 | } |
df476a4d | 136 | LUSTRE_RW_ATTR(max_dirty_mb); |
d7e09d03 | 137 | |
9e7fa149 OD |
138 | LUSTRE_STATIC_UINT_ATTR(debug_peer_on_timeout, &obd_debug_peer_on_timeout); |
139 | LUSTRE_STATIC_UINT_ATTR(dump_on_timeout, &obd_dump_on_timeout); | |
140 | LUSTRE_STATIC_UINT_ATTR(dump_on_eviction, &obd_dump_on_eviction); | |
bcef118e OD |
141 | LUSTRE_STATIC_UINT_ATTR(at_min, &at_min); |
142 | LUSTRE_STATIC_UINT_ATTR(at_max, &at_max); | |
143 | LUSTRE_STATIC_UINT_ATTR(at_extra, &at_extra); | |
144 | LUSTRE_STATIC_UINT_ATTR(at_early_margin, &at_early_margin); | |
145 | LUSTRE_STATIC_UINT_ATTR(at_history, &at_history); | |
9e7fa149 | 146 | |
df476a4d | 147 | #ifdef CONFIG_SYSCTL |
691bc0eb | 148 | static struct ctl_table obd_table[] = { |
e780e3de | 149 | {} |
d7e09d03 PT |
150 | }; |
151 | ||
691bc0eb | 152 | static struct ctl_table parent_table[] = { |
d7e09d03 | 153 | { |
d7e09d03 PT |
154 | .procname = "lustre", |
155 | .data = NULL, | |
156 | .maxlen = 0, | |
157 | .mode = 0555, | |
158 | .child = obd_table | |
e780e3de PT |
159 | }, |
160 | {} | |
d7e09d03 PT |
161 | }; |
162 | #endif | |
163 | ||
e2424a12 OD |
164 | static struct attribute *lustre_attrs[] = { |
165 | &lustre_sattr_timeout.u.attr, | |
df476a4d | 166 | &lustre_attr_max_dirty_mb.attr, |
9e7fa149 OD |
167 | &lustre_sattr_debug_peer_on_timeout.u.attr, |
168 | &lustre_sattr_dump_on_timeout.u.attr, | |
169 | &lustre_sattr_dump_on_eviction.u.attr, | |
bcef118e OD |
170 | &lustre_sattr_at_min.u.attr, |
171 | &lustre_sattr_at_max.u.attr, | |
172 | &lustre_sattr_at_extra.u.attr, | |
173 | &lustre_sattr_at_early_margin.u.attr, | |
174 | &lustre_sattr_at_history.u.attr, | |
e2424a12 OD |
175 | NULL, |
176 | }; | |
177 | ||
178 | static struct attribute_group lustre_attr_group = { | |
179 | .attrs = lustre_attrs, | |
180 | }; | |
181 | ||
182 | int obd_sysctl_init(void) | |
d7e09d03 PT |
183 | { |
184 | #ifdef CONFIG_SYSCTL | |
e4f3771f | 185 | if (!obd_table_header) |
a7f24447 | 186 | obd_table_header = register_sysctl_table(parent_table); |
d7e09d03 | 187 | #endif |
e2424a12 | 188 | return sysfs_create_group(lustre_kobj, &lustre_attr_group); |
d7e09d03 PT |
189 | } |
190 | ||
e4f3771f | 191 | void obd_sysctl_clean(void) |
d7e09d03 PT |
192 | { |
193 | #ifdef CONFIG_SYSCTL | |
e4f3771f | 194 | if (obd_table_header) |
d7e09d03 PT |
195 | unregister_sysctl_table(obd_table_header); |
196 | obd_table_header = NULL; | |
197 | #endif | |
198 | } |