1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * Copyright (C) 2004, 2005 Oracle. All rights reserved.
5 *
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.
10 *
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.
15 *
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.
20 */
21
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 <linux/uaccess.h>
28
29 #include "masklog.h"
30
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);
35
mlog_mask_show(u64 mask,char * buf)36 static ssize_t mlog_mask_show(u64 mask, char *buf)
37 {
38 char *state;
39
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";
46
47 return snprintf(buf, PAGE_SIZE, "%s\n", state);
48 }
49
mlog_mask_store(u64 mask,const char * buf,size_t count)50 static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count)
51 {
52 if (!strncasecmp(buf, "allow", 5)) {
53 __mlog_set_u64(mask, mlog_and_bits);
54 __mlog_clear_u64(mask, mlog_not_bits);
55 } else if (!strncasecmp(buf, "deny", 4)) {
56 __mlog_set_u64(mask, mlog_not_bits);
57 __mlog_clear_u64(mask, mlog_and_bits);
58 } else if (!strncasecmp(buf, "off", 3)) {
59 __mlog_clear_u64(mask, mlog_not_bits);
60 __mlog_clear_u64(mask, mlog_and_bits);
61 } else
62 return -EINVAL;
63
64 return count;
65 }
66
__mlog_printk(const u64 * mask,const char * func,int line,const char * fmt,...)67 void __mlog_printk(const u64 *mask, const char *func, int line,
68 const char *fmt, ...)
69 {
70 struct va_format vaf;
71 va_list args;
72 const char *level;
73 const char *prefix = "";
74
75 if (!__mlog_test_u64(*mask, mlog_and_bits) ||
76 __mlog_test_u64(*mask, mlog_not_bits))
77 return;
78
79 if (*mask & ML_ERROR) {
80 level = KERN_ERR;
81 prefix = "ERROR: ";
82 } else if (*mask & ML_NOTICE) {
83 level = KERN_NOTICE;
84 } else {
85 level = KERN_INFO;
86 }
87
88 va_start(args, fmt);
89
90 vaf.fmt = fmt;
91 vaf.va = &args;
92
93 printk("%s(%s,%u,%u):%s:%d %s%pV",
94 level, current->comm, task_pid_nr(current),
95 raw_smp_processor_id(), func, line, prefix, &vaf);
96
97 va_end(args);
98 }
99 EXPORT_SYMBOL_GPL(__mlog_printk);
100
101 struct mlog_attribute {
102 struct attribute attr;
103 u64 mask;
104 };
105
106 #define to_mlog_attr(_attr) container_of(_attr, struct mlog_attribute, attr)
107
108 #define define_mask(_name) { \
109 .attr = { \
110 .name = #_name, \
111 .mode = S_IRUGO | S_IWUSR, \
112 }, \
113 .mask = ML_##_name, \
114 }
115
116 static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = {
117 define_mask(TCP),
118 define_mask(MSG),
119 define_mask(SOCKET),
120 define_mask(HEARTBEAT),
121 define_mask(HB_BIO),
122 define_mask(DLMFS),
123 define_mask(DLM),
124 define_mask(DLM_DOMAIN),
125 define_mask(DLM_THREAD),
126 define_mask(DLM_MASTER),
127 define_mask(DLM_RECOVERY),
128 define_mask(DLM_GLUE),
129 define_mask(VOTE),
130 define_mask(CONN),
131 define_mask(QUORUM),
132 define_mask(BASTS),
133 define_mask(CLUSTER),
134 define_mask(ERROR),
135 define_mask(NOTICE),
136 define_mask(KTHREAD),
137 };
138
139 static struct attribute *mlog_attr_ptrs[MLOG_MAX_BITS] = {NULL, };
140
mlog_show(struct kobject * obj,struct attribute * attr,char * buf)141 static ssize_t mlog_show(struct kobject *obj, struct attribute *attr,
142 char *buf)
143 {
144 struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
145
146 return mlog_mask_show(mlog_attr->mask, buf);
147 }
148
mlog_store(struct kobject * obj,struct attribute * attr,const char * buf,size_t count)149 static ssize_t mlog_store(struct kobject *obj, struct attribute *attr,
150 const char *buf, size_t count)
151 {
152 struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
153
154 return mlog_mask_store(mlog_attr->mask, buf, count);
155 }
156
157 static const struct sysfs_ops mlog_attr_ops = {
158 .show = mlog_show,
159 .store = mlog_store,
160 };
161
162 static struct kobj_type mlog_ktype = {
163 .default_attrs = mlog_attr_ptrs,
164 .sysfs_ops = &mlog_attr_ops,
165 };
166
167 static struct kset mlog_kset = {
168 .kobj = {.ktype = &mlog_ktype},
169 };
170
mlog_sys_init(struct kset * o2cb_kset)171 int mlog_sys_init(struct kset *o2cb_kset)
172 {
173 int i = 0;
174
175 while (mlog_attrs[i].attr.mode) {
176 mlog_attr_ptrs[i] = &mlog_attrs[i].attr;
177 i++;
178 }
179 mlog_attr_ptrs[i] = NULL;
180
181 kobject_set_name(&mlog_kset.kobj, "logmask");
182 mlog_kset.kobj.kset = o2cb_kset;
183 return kset_register(&mlog_kset);
184 }
185
mlog_sys_shutdown(void)186 void mlog_sys_shutdown(void)
187 {
188 kset_unregister(&mlog_kset);
189 }
190
