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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 | |
6a5b99a4 | 18 | * http://www.gnu.org/licenses/gpl-2.0.html |
d7e09d03 | 19 | * |
d7e09d03 PT |
20 | * GPL HEADER END |
21 | */ | |
22 | /* | |
23 | * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. | |
24 | * Use is subject to license terms. | |
25 | * | |
1dc563a6 | 26 | * Copyright (c) 2011, 2015, Intel Corporation. |
d7e09d03 PT |
27 | */ |
28 | /* | |
29 | * This file is part of Lustre, http://www.lustre.org/ | |
30 | * Lustre is a trademark of Sun Microsystems, Inc. | |
31 | */ | |
32 | ||
33 | #include <linux/module.h> | |
34 | #include <linux/sysctl.h> | |
35 | #include <linux/sched.h> | |
36 | #include <linux/mm.h> | |
d7e09d03 PT |
37 | #include <linux/slab.h> |
38 | #include <linux/stat.h> | |
39 | #include <linux/ctype.h> | |
87822e41 AS |
40 | #include <linux/bitops.h> |
41 | #include <linux/uaccess.h> | |
d7e09d03 PT |
42 | #include <linux/utsname.h> |
43 | ||
44 | #define DEBUG_SUBSYSTEM S_CLASS | |
45 | ||
610f7377 GKH |
46 | #include "../../include/obd_support.h" |
47 | #include "../../include/lprocfs_status.h" | |
d7e09d03 | 48 | |
e2424a12 OD |
49 | struct static_lustre_uintvalue_attr { |
50 | struct { | |
51 | struct attribute attr; | |
52 | ssize_t (*show)(struct kobject *kobj, struct attribute *attr, | |
53 | char *buf); | |
54 | ssize_t (*store)(struct kobject *kobj, struct attribute *attr, | |
55 | const char *buf, size_t len); | |
56 | } u; | |
57 | int *value; | |
58 | }; | |
59 | ||
60 | static ssize_t static_uintvalue_show(struct kobject *kobj, | |
926d6fb2 OD |
61 | struct attribute *attr, |
62 | char *buf) | |
d7e09d03 | 63 | { |
e2424a12 OD |
64 | struct static_lustre_uintvalue_attr *lattr = (void *)attr; |
65 | ||
66 | return sprintf(buf, "%d\n", *lattr->value); | |
67 | } | |
68 | ||
69 | static ssize_t static_uintvalue_store(struct kobject *kobj, | |
926d6fb2 OD |
70 | struct attribute *attr, |
71 | const char *buffer, size_t count) | |
e2424a12 OD |
72 | { |
73 | struct static_lustre_uintvalue_attr *lattr = (void *)attr; | |
d7e09d03 | 74 | int rc; |
e2424a12 | 75 | unsigned int val; |
d7e09d03 | 76 | |
e2424a12 OD |
77 | rc = kstrtouint(buffer, 10, &val); |
78 | if (rc) | |
79 | return rc; | |
80 | ||
81 | *lattr->value = val; | |
82 | ||
83 | return count; | |
d7e09d03 PT |
84 | } |
85 | ||
e2424a12 OD |
86 | #define LUSTRE_STATIC_UINT_ATTR(name, value) \ |
87 | static struct static_lustre_uintvalue_attr lustre_sattr_##name = \ | |
88 | {__ATTR(name, 0644, \ | |
89 | static_uintvalue_show, \ | |
90 | static_uintvalue_store),\ | |
91 | value } | |
92 | ||
93 | LUSTRE_STATIC_UINT_ATTR(timeout, &obd_timeout); | |
94 | ||
df476a4d OD |
95 | static ssize_t max_dirty_mb_show(struct kobject *kobj, struct attribute *attr, |
96 | char *buf) | |
d7e09d03 | 97 | { |
df476a4d | 98 | return sprintf(buf, "%ul\n", |
09cbfeaf | 99 | obd_max_dirty_pages / (1 << (20 - PAGE_SHIFT))); |
df476a4d OD |
100 | } |
101 | ||
102 | static ssize_t max_dirty_mb_store(struct kobject *kobj, struct attribute *attr, | |
103 | const char *buffer, size_t count) | |
104 | { | |
105 | int rc; | |
106 | unsigned long val; | |
107 | ||
108 | rc = kstrtoul(buffer, 10, &val); | |
109 | if (rc) | |
110 | return rc; | |
111 | ||
09cbfeaf | 112 | val *= 1 << (20 - PAGE_SHIFT); /* convert to pages */ |
d7e09d03 | 113 | |
df476a4d OD |
114 | if (val > ((totalram_pages / 10) * 9)) { |
115 | /* Somebody wants to assign too much memory to dirty pages */ | |
116 | return -EINVAL; | |
d7e09d03 | 117 | } |
df476a4d | 118 | |
09cbfeaf | 119 | if (val < 4 << (20 - PAGE_SHIFT)) { |
df476a4d OD |
120 | /* Less than 4 Mb for dirty cache is also bad */ |
121 | return -EINVAL; | |
d7e09d03 | 122 | } |
df476a4d OD |
123 | |
124 | obd_max_dirty_pages = val; | |
125 | ||
126 | return count; | |
d7e09d03 | 127 | } |
df476a4d | 128 | LUSTRE_RW_ATTR(max_dirty_mb); |
d7e09d03 | 129 | |
9e7fa149 OD |
130 | LUSTRE_STATIC_UINT_ATTR(debug_peer_on_timeout, &obd_debug_peer_on_timeout); |
131 | LUSTRE_STATIC_UINT_ATTR(dump_on_timeout, &obd_dump_on_timeout); | |
132 | LUSTRE_STATIC_UINT_ATTR(dump_on_eviction, &obd_dump_on_eviction); | |
bcef118e OD |
133 | LUSTRE_STATIC_UINT_ATTR(at_min, &at_min); |
134 | LUSTRE_STATIC_UINT_ATTR(at_max, &at_max); | |
135 | LUSTRE_STATIC_UINT_ATTR(at_extra, &at_extra); | |
136 | LUSTRE_STATIC_UINT_ATTR(at_early_margin, &at_early_margin); | |
137 | LUSTRE_STATIC_UINT_ATTR(at_history, &at_history); | |
9e7fa149 | 138 | |
e2424a12 OD |
139 | static struct attribute *lustre_attrs[] = { |
140 | &lustre_sattr_timeout.u.attr, | |
df476a4d | 141 | &lustre_attr_max_dirty_mb.attr, |
9e7fa149 OD |
142 | &lustre_sattr_debug_peer_on_timeout.u.attr, |
143 | &lustre_sattr_dump_on_timeout.u.attr, | |
144 | &lustre_sattr_dump_on_eviction.u.attr, | |
bcef118e OD |
145 | &lustre_sattr_at_min.u.attr, |
146 | &lustre_sattr_at_max.u.attr, | |
147 | &lustre_sattr_at_extra.u.attr, | |
148 | &lustre_sattr_at_early_margin.u.attr, | |
149 | &lustre_sattr_at_history.u.attr, | |
e2424a12 OD |
150 | NULL, |
151 | }; | |
152 | ||
153 | static struct attribute_group lustre_attr_group = { | |
154 | .attrs = lustre_attrs, | |
155 | }; | |
156 | ||
157 | int obd_sysctl_init(void) | |
d7e09d03 | 158 | { |
e2424a12 | 159 | return sysfs_create_group(lustre_kobj, &lustre_attr_group); |
d7e09d03 | 160 | } |