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 <asm/uaccess.h>
28
29#include "masklog.h"
30
31struct mlog_bits mlog_and_bits = MLOG_BITS_RHS(MLOG_INITIAL_AND_MASK);
32EXPORT_SYMBOL_GPL(mlog_and_bits);
33struct mlog_bits mlog_not_bits = MLOG_BITS_RHS(MLOG_INITIAL_NOT_MASK);
34EXPORT_SYMBOL_GPL(mlog_not_bits);
35
36static 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
50static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count)
51{
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;
63
64	return count;
65}
66
67struct mlog_attribute {
68	struct attribute attr;
69	u64 mask;
70};
71
72#define to_mlog_attr(_attr) container_of(_attr, struct mlog_attribute, attr)
73
74#define define_mask(_name) {			\
75	.attr = {				\
76		.name = #_name,			\
77		.owner = THIS_MODULE,		\
78		.mode = S_IRUGO | S_IWUSR,	\
79	},					\
80	.mask = ML_##_name,			\
81}
82
83static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = {
84	define_mask(ENTRY),
85	define_mask(EXIT),
86	define_mask(TCP),
87	define_mask(MSG),
88	define_mask(SOCKET),
89	define_mask(HEARTBEAT),
90	define_mask(HB_BIO),
91	define_mask(DLMFS),
92	define_mask(DLM),
93	define_mask(DLM_DOMAIN),
94	define_mask(DLM_THREAD),
95	define_mask(DLM_MASTER),
96	define_mask(DLM_RECOVERY),
97	define_mask(AIO),
98	define_mask(JOURNAL),
99	define_mask(DISK_ALLOC),
100	define_mask(SUPER),
101	define_mask(FILE_IO),
102	define_mask(EXTENT_MAP),
103	define_mask(DLM_GLUE),
104	define_mask(BH_IO),
105	define_mask(UPTODATE),
106	define_mask(NAMEI),
107	define_mask(INODE),
108	define_mask(VOTE),
109	define_mask(DCACHE),
110	define_mask(CONN),
111	define_mask(QUORUM),
112	define_mask(EXPORT),
113	define_mask(ERROR),
114	define_mask(NOTICE),
115	define_mask(KTHREAD),
116};
117
118static struct attribute *mlog_attr_ptrs[MLOG_MAX_BITS] = {NULL, };
119
120static ssize_t mlog_show(struct kobject *obj, struct attribute *attr,
121			 char *buf)
122{
123	struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
124
125	return mlog_mask_show(mlog_attr->mask, buf);
126}
127
128static ssize_t mlog_store(struct kobject *obj, struct attribute *attr,
129			  const char *buf, size_t count)
130{
131	struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
132
133	return mlog_mask_store(mlog_attr->mask, buf, count);
134}
135
136static struct sysfs_ops mlog_attr_ops = {
137	.show  = mlog_show,
138	.store = mlog_store,
139};
140
141static struct kobj_type mlog_ktype = {
142	.default_attrs = mlog_attr_ptrs,
143	.sysfs_ops     = &mlog_attr_ops,
144};
145
146static struct kset mlog_kset = {
147	.kobj   = {.name = "logmask", .ktype = &mlog_ktype},
148};
149
150int mlog_sys_init(struct kset *o2cb_subsys)
151{
152	int i = 0;
153
154	while (mlog_attrs[i].attr.mode) {
155		mlog_attr_ptrs[i] = &mlog_attrs[i].attr;
156		i++;
157	}
158	mlog_attr_ptrs[i] = NULL;
159
160	kobj_set_kset_s(&mlog_kset, *o2cb_subsys);
161	return kset_register(&mlog_kset);
162}
163
164void mlog_sys_shutdown(void)
165{
166	kset_unregister(&mlog_kset);
167}
168