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a31b1d3d BF |
1 | /* |
2 | * Copyright (c) 2014 Red Hat, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it would be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #include "xfs.h" | |
20 | #include "xfs_sysfs.h" | |
baff4e44 BF |
21 | #include "xfs_log_format.h" |
22 | #include "xfs_log.h" | |
23 | #include "xfs_log_priv.h" | |
a31b1d3d BF |
24 | |
25 | struct xfs_sysfs_attr { | |
26 | struct attribute attr; | |
27 | ssize_t (*show)(char *buf, void *data); | |
28 | ssize_t (*store)(const char *buf, size_t count, void *data); | |
29 | }; | |
30 | ||
31 | static inline struct xfs_sysfs_attr * | |
32 | to_attr(struct attribute *attr) | |
33 | { | |
34 | return container_of(attr, struct xfs_sysfs_attr, attr); | |
35 | } | |
36 | ||
37 | #define XFS_SYSFS_ATTR_RW(name) \ | |
38 | static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name) | |
39 | #define XFS_SYSFS_ATTR_RO(name) \ | |
40 | static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name) | |
41 | ||
42 | #define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr | |
43 | ||
44 | /* | |
45 | * xfs_mount kobject. This currently has no attributes and thus no need for show | |
46 | * and store helpers. The mp kobject serves as the per-mount parent object that | |
47 | * is identified by the fsname under sysfs. | |
48 | */ | |
49 | ||
50 | struct kobj_type xfs_mp_ktype = { | |
51 | .release = xfs_sysfs_release, | |
52 | }; | |
baff4e44 | 53 | |
65b65735 BF |
54 | #ifdef DEBUG |
55 | /* debug */ | |
56 | ||
2e227178 BF |
57 | STATIC ssize_t |
58 | log_recovery_delay_store( | |
59 | const char *buf, | |
60 | size_t count, | |
61 | void *data) | |
62 | { | |
63 | int ret; | |
64 | int val; | |
65 | ||
66 | ret = kstrtoint(buf, 0, &val); | |
67 | if (ret) | |
68 | return ret; | |
69 | ||
70 | if (val < 0 || val > 60) | |
71 | return -EINVAL; | |
72 | ||
73 | xfs_globals.log_recovery_delay = val; | |
74 | ||
75 | return count; | |
76 | } | |
77 | ||
78 | STATIC ssize_t | |
79 | log_recovery_delay_show( | |
80 | char *buf, | |
81 | void *data) | |
82 | { | |
83 | return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay); | |
84 | } | |
85 | XFS_SYSFS_ATTR_RW(log_recovery_delay); | |
86 | ||
65b65735 | 87 | static struct attribute *xfs_dbg_attrs[] = { |
2e227178 | 88 | ATTR_LIST(log_recovery_delay), |
65b65735 BF |
89 | NULL, |
90 | }; | |
91 | ||
92 | STATIC ssize_t | |
93 | xfs_dbg_show( | |
94 | struct kobject *kobject, | |
95 | struct attribute *attr, | |
96 | char *buf) | |
97 | { | |
98 | struct xfs_sysfs_attr *xfs_attr = to_attr(attr); | |
99 | ||
100 | return xfs_attr->show ? xfs_attr->show(buf, NULL) : 0; | |
101 | } | |
102 | ||
103 | STATIC ssize_t | |
104 | xfs_dbg_store( | |
105 | struct kobject *kobject, | |
106 | struct attribute *attr, | |
107 | const char *buf, | |
108 | size_t count) | |
109 | { | |
110 | struct xfs_sysfs_attr *xfs_attr = to_attr(attr); | |
111 | ||
112 | return xfs_attr->store ? xfs_attr->store(buf, count, NULL) : 0; | |
113 | } | |
114 | ||
115 | static struct sysfs_ops xfs_dbg_ops = { | |
116 | .show = xfs_dbg_show, | |
117 | .store = xfs_dbg_store, | |
118 | }; | |
119 | ||
120 | struct kobj_type xfs_dbg_ktype = { | |
121 | .release = xfs_sysfs_release, | |
122 | .sysfs_ops = &xfs_dbg_ops, | |
123 | .default_attrs = xfs_dbg_attrs, | |
124 | }; | |
125 | ||
126 | #endif /* DEBUG */ | |
127 | ||
baff4e44 BF |
128 | /* xlog */ |
129 | ||
80d6d698 BF |
130 | STATIC ssize_t |
131 | log_head_lsn_show( | |
132 | char *buf, | |
133 | void *data) | |
134 | { | |
135 | struct xlog *log = data; | |
136 | int cycle; | |
137 | int block; | |
138 | ||
139 | spin_lock(&log->l_icloglock); | |
140 | cycle = log->l_curr_cycle; | |
141 | block = log->l_curr_block; | |
142 | spin_unlock(&log->l_icloglock); | |
143 | ||
144 | return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block); | |
145 | } | |
146 | XFS_SYSFS_ATTR_RO(log_head_lsn); | |
147 | ||
148 | STATIC ssize_t | |
149 | log_tail_lsn_show( | |
150 | char *buf, | |
151 | void *data) | |
152 | { | |
153 | struct xlog *log = data; | |
154 | int cycle; | |
155 | int block; | |
156 | ||
157 | xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block); | |
158 | return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block); | |
159 | } | |
160 | XFS_SYSFS_ATTR_RO(log_tail_lsn); | |
161 | ||
162 | STATIC ssize_t | |
163 | reserve_grant_head_show( | |
164 | char *buf, | |
165 | void *data) | |
166 | { | |
167 | struct xlog *log = data; | |
168 | int cycle; | |
169 | int bytes; | |
170 | ||
171 | xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes); | |
172 | return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes); | |
173 | } | |
174 | XFS_SYSFS_ATTR_RO(reserve_grant_head); | |
175 | ||
176 | STATIC ssize_t | |
177 | write_grant_head_show( | |
178 | char *buf, | |
179 | void *data) | |
180 | { | |
181 | struct xlog *log = data; | |
182 | int cycle; | |
183 | int bytes; | |
184 | ||
185 | xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes); | |
186 | return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes); | |
187 | } | |
188 | XFS_SYSFS_ATTR_RO(write_grant_head); | |
189 | ||
baff4e44 | 190 | static struct attribute *xfs_log_attrs[] = { |
80d6d698 BF |
191 | ATTR_LIST(log_head_lsn), |
192 | ATTR_LIST(log_tail_lsn), | |
193 | ATTR_LIST(reserve_grant_head), | |
194 | ATTR_LIST(write_grant_head), | |
baff4e44 BF |
195 | NULL, |
196 | }; | |
197 | ||
198 | static inline struct xlog * | |
199 | to_xlog(struct kobject *kobject) | |
200 | { | |
201 | struct xfs_kobj *kobj = to_kobj(kobject); | |
202 | return container_of(kobj, struct xlog, l_kobj); | |
203 | } | |
204 | ||
205 | STATIC ssize_t | |
206 | xfs_log_show( | |
207 | struct kobject *kobject, | |
208 | struct attribute *attr, | |
209 | char *buf) | |
210 | { | |
211 | struct xlog *log = to_xlog(kobject); | |
212 | struct xfs_sysfs_attr *xfs_attr = to_attr(attr); | |
213 | ||
214 | return xfs_attr->show ? xfs_attr->show(buf, log) : 0; | |
215 | } | |
216 | ||
217 | STATIC ssize_t | |
218 | xfs_log_store( | |
219 | struct kobject *kobject, | |
220 | struct attribute *attr, | |
221 | const char *buf, | |
222 | size_t count) | |
223 | { | |
224 | struct xlog *log = to_xlog(kobject); | |
225 | struct xfs_sysfs_attr *xfs_attr = to_attr(attr); | |
226 | ||
227 | return xfs_attr->store ? xfs_attr->store(buf, count, log) : 0; | |
228 | } | |
229 | ||
230 | static struct sysfs_ops xfs_log_ops = { | |
231 | .show = xfs_log_show, | |
232 | .store = xfs_log_store, | |
233 | }; | |
234 | ||
235 | struct kobj_type xfs_log_ktype = { | |
236 | .release = xfs_sysfs_release, | |
237 | .sysfs_ops = &xfs_log_ops, | |
238 | .default_attrs = xfs_log_attrs, | |
239 | }; |