OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / fs / ocfs2 / cluster / masklog.c
blob07ac24fd92520f604f6d3cfeff4cd4bd2c6ad85c
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
4 * Copyright (C) 2004, 2005 Oracle. All rights reserved.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public
17 * License along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA.
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/proc_fs.h>
25 #include <linux/seq_file.h>
26 #include <linux/string.h>
27 #include <asm/uaccess.h>
29 #include "masklog.h"
31 struct mlog_bits mlog_and_bits = MLOG_BITS_RHS(MLOG_INITIAL_AND_MASK);
32 EXPORT_SYMBOL_GPL(mlog_and_bits);
33 struct mlog_bits mlog_not_bits = MLOG_BITS_RHS(0);
34 EXPORT_SYMBOL_GPL(mlog_not_bits);
36 static ssize_t mlog_mask_show(u64 mask, char *buf)
38 char *state;
40 if (__mlog_test_u64(mask, mlog_and_bits))
41 state = "allow";
42 else if (__mlog_test_u64(mask, mlog_not_bits))
43 state = "deny";
44 else
45 state = "off";
47 return snprintf(buf, PAGE_SIZE, "%s\n", state);
50 static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count)
52 if (!strnicmp(buf, "allow", 5)) {
53 __mlog_set_u64(mask, mlog_and_bits);
54 __mlog_clear_u64(mask, mlog_not_bits);
55 } else if (!strnicmp(buf, "deny", 4)) {
56 __mlog_set_u64(mask, mlog_not_bits);
57 __mlog_clear_u64(mask, mlog_and_bits);
58 } else if (!strnicmp(buf, "off", 3)) {
59 __mlog_clear_u64(mask, mlog_not_bits);
60 __mlog_clear_u64(mask, mlog_and_bits);
61 } else
62 return -EINVAL;
64 return count;
67 struct mlog_attribute {
68 struct attribute attr;
69 u64 mask;
72 #define to_mlog_attr(_attr) container_of(_attr, struct mlog_attribute, attr)
74 #define define_mask(_name) { \
75 .attr = { \
76 .name = #_name, \
77 .mode = S_IRUGO | S_IWUSR, \
78 }, \
79 .mask = ML_##_name, \
82 static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = {
83 define_mask(TCP),
84 define_mask(MSG),
85 define_mask(SOCKET),
86 define_mask(HEARTBEAT),
87 define_mask(HB_BIO),
88 define_mask(DLMFS),
89 define_mask(DLM),
90 define_mask(DLM_DOMAIN),
91 define_mask(DLM_THREAD),
92 define_mask(DLM_MASTER),
93 define_mask(DLM_RECOVERY),
94 define_mask(DLM_GLUE),
95 define_mask(VOTE),
96 define_mask(CONN),
97 define_mask(QUORUM),
98 define_mask(BASTS),
99 define_mask(CLUSTER),
100 define_mask(ERROR),
101 define_mask(NOTICE),
102 define_mask(KTHREAD),
105 static struct attribute *mlog_attr_ptrs[MLOG_MAX_BITS] = {NULL, };
107 static ssize_t mlog_show(struct kobject *obj, struct attribute *attr,
108 char *buf)
110 struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
112 return mlog_mask_show(mlog_attr->mask, buf);
115 static ssize_t mlog_store(struct kobject *obj, struct attribute *attr,
116 const char *buf, size_t count)
118 struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
120 return mlog_mask_store(mlog_attr->mask, buf, count);
123 static const struct sysfs_ops mlog_attr_ops = {
124 .show = mlog_show,
125 .store = mlog_store,
128 static struct kobj_type mlog_ktype = {
129 .default_attrs = mlog_attr_ptrs,
130 .sysfs_ops = &mlog_attr_ops,
133 static struct kset mlog_kset = {
134 .kobj = {.ktype = &mlog_ktype},
137 int mlog_sys_init(struct kset *o2cb_kset)
139 int i = 0;
141 while (mlog_attrs[i].attr.mode) {
142 mlog_attr_ptrs[i] = &mlog_attrs[i].attr;
143 i++;
145 mlog_attr_ptrs[i] = NULL;
147 kobject_set_name(&mlog_kset.kobj, "logmask");
148 mlog_kset.kobj.kset = o2cb_kset;
149 return kset_register(&mlog_kset);
152 void mlog_sys_shutdown(void)
154 kset_unregister(&mlog_kset);