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6#include <linux/module.h>
7#include <linux/kernel.h>
8#include <linux/proc_fs.h>
9#include <linux/seq_file.h>
10#include <linux/string.h>
11#include <linux/uaccess.h>
12
13#include "masklog.h"
14
15struct mlog_bits mlog_and_bits = MLOG_BITS_RHS(MLOG_INITIAL_AND_MASK);
16EXPORT_SYMBOL_GPL(mlog_and_bits);
17struct mlog_bits mlog_not_bits = MLOG_BITS_RHS(0);
18EXPORT_SYMBOL_GPL(mlog_not_bits);
19
20static ssize_t mlog_mask_show(u64 mask, char *buf)
21{
22 char *state;
23
24 if (__mlog_test_u64(mask, mlog_and_bits))
25 state = "allow";
26 else if (__mlog_test_u64(mask, mlog_not_bits))
27 state = "deny";
28 else
29 state = "off";
30
31 return snprintf(buf, PAGE_SIZE, "%s\n", state);
32}
33
34static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count)
35{
36 if (!strncasecmp(buf, "allow", 5)) {
37 __mlog_set_u64(mask, mlog_and_bits);
38 __mlog_clear_u64(mask, mlog_not_bits);
39 } else if (!strncasecmp(buf, "deny", 4)) {
40 __mlog_set_u64(mask, mlog_not_bits);
41 __mlog_clear_u64(mask, mlog_and_bits);
42 } else if (!strncasecmp(buf, "off", 3)) {
43 __mlog_clear_u64(mask, mlog_not_bits);
44 __mlog_clear_u64(mask, mlog_and_bits);
45 } else
46 return -EINVAL;
47
48 return count;
49}
50
51void __mlog_printk(const u64 *mask, const char *func, int line,
52 const char *fmt, ...)
53{
54 struct va_format vaf;
55 va_list args;
56 const char *level;
57 const char *prefix = "";
58
59 if (!__mlog_test_u64(*mask, mlog_and_bits) ||
60 __mlog_test_u64(*mask, mlog_not_bits))
61 return;
62
63 if (*mask & ML_ERROR) {
64 level = KERN_ERR;
65 prefix = "ERROR: ";
66 } else if (*mask & ML_NOTICE) {
67 level = KERN_NOTICE;
68 } else {
69 level = KERN_INFO;
70 }
71
72 va_start(args, fmt);
73
74 vaf.fmt = fmt;
75 vaf.va = &args;
76
77 printk("%s(%s,%u,%u):%s:%d %s%pV",
78 level, current->comm, task_pid_nr(current),
79 raw_smp_processor_id(), func, line, prefix, &vaf);
80
81 va_end(args);
82}
83EXPORT_SYMBOL_GPL(__mlog_printk);
84
85struct mlog_attribute {
86 struct attribute attr;
87 u64 mask;
88};
89
90#define to_mlog_attr(_attr) container_of(_attr, struct mlog_attribute, attr)
91
92#define define_mask(_name) { \
93 .attr = { \
94 .name = #_name, \
95 .mode = S_IRUGO | S_IWUSR, \
96 }, \
97 .mask = ML_##_name, \
98}
99
100static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = {
101 define_mask(TCP),
102 define_mask(MSG),
103 define_mask(SOCKET),
104 define_mask(HEARTBEAT),
105 define_mask(HB_BIO),
106 define_mask(DLMFS),
107 define_mask(DLM),
108 define_mask(DLM_DOMAIN),
109 define_mask(DLM_THREAD),
110 define_mask(DLM_MASTER),
111 define_mask(DLM_RECOVERY),
112 define_mask(DLM_GLUE),
113 define_mask(VOTE),
114 define_mask(CONN),
115 define_mask(QUORUM),
116 define_mask(BASTS),
117 define_mask(CLUSTER),
118 define_mask(ERROR),
119 define_mask(NOTICE),
120 define_mask(KTHREAD),
121};
122
123static struct attribute *mlog_attr_ptrs[MLOG_MAX_BITS] = {NULL, };
124
125static ssize_t mlog_show(struct kobject *obj, struct attribute *attr,
126 char *buf)
127{
128 struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
129
130 return mlog_mask_show(mlog_attr->mask, buf);
131}
132
133static ssize_t mlog_store(struct kobject *obj, struct attribute *attr,
134 const char *buf, size_t count)
135{
136 struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
137
138 return mlog_mask_store(mlog_attr->mask, buf, count);
139}
140
141static const struct sysfs_ops mlog_attr_ops = {
142 .show = mlog_show,
143 .store = mlog_store,
144};
145
146static struct kobj_type mlog_ktype = {
147 .default_attrs = mlog_attr_ptrs,
148 .sysfs_ops = &mlog_attr_ops,
149};
150
151static struct kset mlog_kset = {
152 .kobj = {.ktype = &mlog_ktype},
153};
154
155int mlog_sys_init(struct kset *o2cb_kset)
156{
157 int i = 0;
158
159 while (mlog_attrs[i].attr.mode) {
160 mlog_attr_ptrs[i] = &mlog_attrs[i].attr;
161 i++;
162 }
163 mlog_attr_ptrs[i] = NULL;
164
165 kobject_set_name(&mlog_kset.kobj, "logmask");
166 mlog_kset.kobj.kset = o2cb_kset;
167 return kset_register(&mlog_kset);
168}
169
170void mlog_sys_shutdown(void)
171{
172 kset_unregister(&mlog_kset);
173}
174
