summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_sysfs.c
blob: aa03670851d86574cc542a2eccb1b5c4607e4ca5 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
 * Copyright (c) 2014 Red Hat, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "xfs.h"
#include "xfs_sysfs.h"
#include "xfs_log_format.h"
#include "xfs_log.h"
#include "xfs_log_priv.h"

struct xfs_sysfs_attr {
	struct attribute attr;
	ssize_t (*show)(char *buf, void *data);
	ssize_t (*store)(const char *buf, size_t count, void *data);
};

static inline struct xfs_sysfs_attr *
to_attr(struct attribute *attr)
{
	return container_of(attr, struct xfs_sysfs_attr, attr);
}

#define XFS_SYSFS_ATTR_RW(name) \
	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
#define XFS_SYSFS_ATTR_RO(name) \
	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)

#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr

/*
 * xfs_mount kobject. This currently has no attributes and thus no need for show
 * and store helpers. The mp kobject serves as the per-mount parent object that
 * is identified by the fsname under sysfs.
 */

struct kobj_type xfs_mp_ktype = {
	.release = xfs_sysfs_release,
};

#ifdef DEBUG
/* debug */

STATIC ssize_t
log_recovery_delay_store(
	const char	*buf,
	size_t		count,
	void		*data)
{
	int		ret;
	int		val;

	ret = kstrtoint(buf, 0, &val);
	if (ret)
		return ret;

	if (val < 0 || val > 60)
		return -EINVAL;

	xfs_globals.log_recovery_delay = val;

	return count;
}

STATIC ssize_t
log_recovery_delay_show(
	char	*buf,
	void	*data)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
}
XFS_SYSFS_ATTR_RW(log_recovery_delay);

static struct attribute *xfs_dbg_attrs[] = {
	ATTR_LIST(log_recovery_delay),
	NULL,
};

STATIC ssize_t
xfs_dbg_show(
	struct kobject		*kobject,
	struct attribute	*attr,
	char			*buf)
{
	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);

	return xfs_attr->show ? xfs_attr->show(buf, NULL) : 0;
}

STATIC ssize_t
xfs_dbg_store(
	struct kobject		*kobject,
	struct attribute	*attr,
	const char		*buf,
	size_t			count)
{
	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);

	return xfs_attr->store ? xfs_attr->store(buf, count, NULL) : 0;
}

static struct sysfs_ops xfs_dbg_ops = {
	.show = xfs_dbg_show,
	.store = xfs_dbg_store,
};

struct kobj_type xfs_dbg_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_dbg_ops,
	.default_attrs = xfs_dbg_attrs,
};

#endif /* DEBUG */

/* xlog */

STATIC ssize_t
log_head_lsn_show(
	char	*buf,
	void	*data)
{
	struct xlog *log = data;
	int cycle;
	int block;

	spin_lock(&log->l_icloglock);
	cycle = log->l_curr_cycle;
	block = log->l_curr_block;
	spin_unlock(&log->l_icloglock);

	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
}
XFS_SYSFS_ATTR_RO(log_head_lsn);

STATIC ssize_t
log_tail_lsn_show(
	char	*buf,
	void	*data)
{
	struct xlog *log = data;
	int cycle;
	int block;

	xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
}
XFS_SYSFS_ATTR_RO(log_tail_lsn);

STATIC ssize_t
reserve_grant_head_show(
	char	*buf,
	void	*data)
{
	struct xlog *log = data;
	int cycle;
	int bytes;

	xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
}
XFS_SYSFS_ATTR_RO(reserve_grant_head);

STATIC ssize_t
write_grant_head_show(
	char	*buf,
	void	*data)
{
	struct xlog *log = data;
	int cycle;
	int bytes;

	xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
}
XFS_SYSFS_ATTR_RO(write_grant_head);

static struct attribute *xfs_log_attrs[] = {
	ATTR_LIST(log_head_lsn),
	ATTR_LIST(log_tail_lsn),
	ATTR_LIST(reserve_grant_head),
	ATTR_LIST(write_grant_head),
	NULL,
};

static inline struct xlog *
to_xlog(struct kobject *kobject)
{
	struct xfs_kobj *kobj = to_kobj(kobject);
	return container_of(kobj, struct xlog, l_kobj);
}

STATIC ssize_t
xfs_log_show(
	struct kobject		*kobject,
	struct attribute	*attr,
	char			*buf)
{
	struct xlog *log = to_xlog(kobject);
	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);

	return xfs_attr->show ? xfs_attr->show(buf, log) : 0;
}

STATIC ssize_t
xfs_log_store(
	struct kobject		*kobject,
	struct attribute	*attr,
	const char		*buf,
	size_t			count)
{
	struct xlog *log = to_xlog(kobject);
	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);

	return xfs_attr->store ? xfs_attr->store(buf, count, log) : 0;
}

static struct sysfs_ops xfs_log_ops = {
	.show = xfs_log_show,
	.store = xfs_log_store,
};

struct kobj_type xfs_log_ktype = {
	.release = xfs_sysfs_release,
	.sysfs_ops = &xfs_log_ops,
	.default_attrs = xfs_log_attrs,
};