| 1 |
|
| 2 | #ifndef _BCACHE_SYSFS_H_
|
| 3 | #define _BCACHE_SYSFS_H_
|
| 4 |
|
| 5 | #define KTYPE(type) \
|
| 6 | const struct kobj_type type ## _ktype = { \
|
| 7 | .release = type ## _release, \
|
| 8 | .sysfs_ops = &((const struct sysfs_ops) { \
|
| 9 | .show = type ## _show, \
|
| 10 | .store = type ## _store \
|
| 11 | }), \
|
| 12 | .default_groups = type ## _groups \
|
| 13 | }
|
| 14 |
|
| 15 | #define SHOW(fn) \
|
| 16 | static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
|
| 17 | char *buf) \
|
| 18 |
|
| 19 | #define STORE(fn) \
|
| 20 | static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
|
| 21 | const char *buf, size_t size) \
|
| 22 |
|
| 23 | #define SHOW_LOCKED(fn) \
|
| 24 | SHOW(fn) \
|
| 25 | { \
|
| 26 | ssize_t ret; \
|
| 27 | mutex_lock(&bch_register_lock); \
|
| 28 | ret = __ ## fn ## _show(kobj, attr, buf); \
|
| 29 | mutex_unlock(&bch_register_lock); \
|
| 30 | return ret; \
|
| 31 | }
|
| 32 |
|
| 33 | #define STORE_LOCKED(fn) \
|
| 34 | STORE(fn) \
|
| 35 | { \
|
| 36 | ssize_t ret; \
|
| 37 | mutex_lock(&bch_register_lock); \
|
| 38 | ret = __ ## fn ## _store(kobj, attr, buf, size); \
|
| 39 | mutex_unlock(&bch_register_lock); \
|
| 40 | return ret; \
|
| 41 | }
|
| 42 |
|
| 43 | #define __sysfs_attribute(_name, _mode) \
|
| 44 | static struct attribute sysfs_##_name = \
|
| 45 | { .name = #_name, .mode = _mode }
|
| 46 |
|
| 47 | #define write_attribute(n) __sysfs_attribute(n, 0200)
|
| 48 | #define read_attribute(n) __sysfs_attribute(n, 0444)
|
| 49 | #define rw_attribute(n) __sysfs_attribute(n, 0644)
|
| 50 |
|
| 51 | #define sysfs_printf(file, fmt, ...) \
|
| 52 | do { \
|
| 53 | if (attr == &sysfs_ ## file) \
|
| 54 | return sysfs_emit(buf, fmt "\n", __VA_ARGS__); \
|
| 55 | } while (0)
|
| 56 |
|
| 57 | #define sysfs_print(file, var) \
|
| 58 | do { \
|
| 59 | if (attr == &sysfs_ ## file) \
|
| 60 | return sysfs_emit(buf, \
|
| 61 | __builtin_types_compatible_p(typeof(var), int) \
|
| 62 | ? "%i\n" : \
|
| 63 | __builtin_types_compatible_p(typeof(var), unsigned int) \
|
| 64 | ? "%u\n" : \
|
| 65 | __builtin_types_compatible_p(typeof(var), long) \
|
| 66 | ? "%li\n" : \
|
| 67 | __builtin_types_compatible_p(typeof(var), unsigned long)\
|
| 68 | ? "%lu\n" : \
|
| 69 | __builtin_types_compatible_p(typeof(var), int64_t) \
|
| 70 | ? "%lli\n" : \
|
| 71 | __builtin_types_compatible_p(typeof(var), uint64_t) \
|
| 72 | ? "%llu\n" : \
|
| 73 | __builtin_types_compatible_p(typeof(var), const char *) \
|
| 74 | ? "%s\n" : "%i\n", var); \
|
| 75 | } while (0)
|
| 76 |
|
| 77 | #define sysfs_hprint(file, val) \
|
| 78 | do { \
|
| 79 | if (attr == &sysfs_ ## file) { \
|
| 80 | ssize_t ret = bch_hprint(buf, val); \
|
| 81 | strcat(buf, "\n"); \
|
| 82 | return ret + 1; \
|
| 83 | } \
|
| 84 | } while (0)
|
| 85 |
|
| 86 | #define var_printf(_var, fmt) sysfs_printf(_var, fmt, var(_var))
|
| 87 | #define var_print(_var) sysfs_print(_var, var(_var))
|
| 88 | #define var_hprint(_var) sysfs_hprint(_var, var(_var))
|
| 89 |
|
| 90 | #define sysfs_strtoul(file, var) \
|
| 91 | do { \
|
| 92 | if (attr == &sysfs_ ## file) \
|
| 93 | return strtoul_safe(buf, var) ?: (ssize_t) size; \
|
| 94 | } while (0)
|
| 95 |
|
| 96 | #define sysfs_strtoul_bool(file, var) \
|
| 97 | do { \
|
| 98 | if (attr == &sysfs_ ## file) { \
|
| 99 | unsigned long v = strtoul_or_return(buf); \
|
| 100 | \
|
| 101 | var = v ? 1 : 0; \
|
| 102 | return size; \
|
| 103 | } \
|
| 104 | } while (0)
|
| 105 |
|
| 106 | #define sysfs_strtoul_clamp(file, var, min, max) \
|
| 107 | do { \
|
| 108 | if (attr == &sysfs_ ## file) { \
|
| 109 | unsigned long v = 0; \
|
| 110 | ssize_t ret; \
|
| 111 | ret = strtoul_safe_clamp(buf, v, min, max); \
|
| 112 | if (!ret) { \
|
| 113 | var = v; \
|
| 114 | return size; \
|
| 115 | } \
|
| 116 | return ret; \
|
| 117 | } \
|
| 118 | } while (0)
|
| 119 |
|
| 120 | #define strtoul_or_return(cp) \
|
| 121 | ({ \
|
| 122 | unsigned long _v; \
|
| 123 | int _r = kstrtoul(cp, 10, &_v); \
|
| 124 | if (_r) \
|
| 125 | return _r; \
|
| 126 | _v; \
|
| 127 | })
|
| 128 |
|
| 129 | #define strtoi_h_or_return(cp, v) \
|
| 130 | do { \
|
| 131 | int _r = strtoi_h(cp, &v); \
|
| 132 | if (_r) \
|
| 133 | return _r; \
|
| 134 | } while (0)
|
| 135 |
|
| 136 | #define sysfs_hatoi(file, var) \
|
| 137 | do { \
|
| 138 | if (attr == &sysfs_ ## file) \
|
| 139 | return strtoi_h(buf, &var) ?: (ssize_t) size; \
|
| 140 | } while (0)
|
| 141 |
|
| 142 | #endif
|