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cafe5635 KO |
1 | #ifndef _BCACHE_SYSFS_H_ |
2 | #define _BCACHE_SYSFS_H_ | |
3 | ||
4 | #define KTYPE(type) \ | |
5 | struct kobj_type type ## _ktype = { \ | |
6 | .release = type ## _release, \ | |
7 | .sysfs_ops = &((const struct sysfs_ops) { \ | |
8 | .show = type ## _show, \ | |
9 | .store = type ## _store \ | |
10 | }), \ | |
11 | .default_attrs = type ## _files \ | |
12 | } | |
13 | ||
14 | #define SHOW(fn) \ | |
15 | static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\ | |
16 | char *buf) \ | |
17 | ||
18 | #define STORE(fn) \ | |
19 | static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\ | |
20 | const char *buf, size_t size) \ | |
21 | ||
22 | #define SHOW_LOCKED(fn) \ | |
23 | SHOW(fn) \ | |
24 | { \ | |
25 | ssize_t ret; \ | |
26 | mutex_lock(&bch_register_lock); \ | |
27 | ret = __ ## fn ## _show(kobj, attr, buf); \ | |
28 | mutex_unlock(&bch_register_lock); \ | |
29 | return ret; \ | |
30 | } | |
31 | ||
32 | #define STORE_LOCKED(fn) \ | |
33 | STORE(fn) \ | |
34 | { \ | |
35 | ssize_t ret; \ | |
36 | mutex_lock(&bch_register_lock); \ | |
37 | ret = __ ## fn ## _store(kobj, attr, buf, size); \ | |
38 | mutex_unlock(&bch_register_lock); \ | |
39 | return ret; \ | |
40 | } | |
41 | ||
42 | #define __sysfs_attribute(_name, _mode) \ | |
43 | static struct attribute sysfs_##_name = \ | |
44 | { .name = #_name, .mode = _mode } | |
45 | ||
46 | #define write_attribute(n) __sysfs_attribute(n, S_IWUSR) | |
47 | #define read_attribute(n) __sysfs_attribute(n, S_IRUGO) | |
48 | #define rw_attribute(n) __sysfs_attribute(n, S_IRUGO|S_IWUSR) | |
49 | ||
50 | #define sysfs_printf(file, fmt, ...) \ | |
51 | do { \ | |
52 | if (attr == &sysfs_ ## file) \ | |
53 | return snprintf(buf, PAGE_SIZE, fmt "\n", __VA_ARGS__); \ | |
54 | } while (0) | |
55 | ||
56 | #define sysfs_print(file, var) \ | |
57 | do { \ | |
58 | if (attr == &sysfs_ ## file) \ | |
59 | return snprint(buf, PAGE_SIZE, var); \ | |
60 | } while (0) | |
61 | ||
62 | #define sysfs_hprint(file, val) \ | |
63 | do { \ | |
64 | if (attr == &sysfs_ ## file) { \ | |
169ef1cf | 65 | ssize_t ret = bch_hprint(buf, val); \ |
cafe5635 KO |
66 | strcat(buf, "\n"); \ |
67 | return ret + 1; \ | |
68 | } \ | |
69 | } while (0) | |
70 | ||
71 | #define var_printf(_var, fmt) sysfs_printf(_var, fmt, var(_var)) | |
72 | #define var_print(_var) sysfs_print(_var, var(_var)) | |
73 | #define var_hprint(_var) sysfs_hprint(_var, var(_var)) | |
74 | ||
75 | #define sysfs_strtoul(file, var) \ | |
76 | do { \ | |
77 | if (attr == &sysfs_ ## file) \ | |
78 | return strtoul_safe(buf, var) ?: (ssize_t) size; \ | |
79 | } while (0) | |
80 | ||
81 | #define sysfs_strtoul_clamp(file, var, min, max) \ | |
82 | do { \ | |
83 | if (attr == &sysfs_ ## file) \ | |
84 | return strtoul_safe_clamp(buf, var, min, max) \ | |
85 | ?: (ssize_t) size; \ | |
86 | } while (0) | |
87 | ||
88 | #define strtoul_or_return(cp) \ | |
89 | ({ \ | |
90 | unsigned long _v; \ | |
91 | int _r = kstrtoul(cp, 10, &_v); \ | |
92 | if (_r) \ | |
93 | return _r; \ | |
94 | _v; \ | |
95 | }) | |
96 | ||
97 | #define strtoi_h_or_return(cp, v) \ | |
98 | do { \ | |
99 | int _r = strtoi_h(cp, &v); \ | |
100 | if (_r) \ | |
101 | return _r; \ | |
102 | } while (0) | |
103 | ||
104 | #define sysfs_hatoi(file, var) \ | |
105 | do { \ | |
106 | if (attr == &sysfs_ ## file) \ | |
107 | return strtoi_h(buf, &var) ?: (ssize_t) size; \ | |
108 | } while (0) | |
109 | ||
110 | #endif /* _BCACHE_SYSFS_H_ */ |