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#ifndef _BCACHE_SYSFS_H_
#define _BCACHE_SYSFS_H_
#define KTYPE(type) \
struct kobj_type type ## _ktype = { \
.release = type ## _release, \
.sysfs_ops = &((const struct sysfs_ops) { \
.show = type ## _show, \
.store = type ## _store \
}), \
.default_attrs = type ## _files \
}
#define SHOW(fn) \
static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
char *buf) \
#define STORE(fn) \
static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
const char *buf, size_t size) \
#define SHOW_LOCKED(fn) \
SHOW(fn) \
{ \
ssize_t ret; \
mutex_lock(&bch_register_lock); \
ret = __ ## fn ## _show(kobj, attr, buf); \
mutex_unlock(&bch_register_lock); \
return ret; \
}
#define STORE_LOCKED(fn) \
STORE(fn) \
{ \
ssize_t ret; \
mutex_lock(&bch_register_lock); \
ret = __ ## fn ## _store(kobj, attr, buf, size); \
mutex_unlock(&bch_register_lock); \
return ret; \
}
#define __sysfs_attribute(_name, _mode) \
static struct attribute sysfs_##_name = \
{ .name = #_name, .mode = _mode }
#define write_attribute(n) __sysfs_attribute(n, S_IWUSR)
#define read_attribute(n) __sysfs_attribute(n, S_IRUGO)
#define rw_attribute(n) __sysfs_attribute(n, S_IRUGO|S_IWUSR)
#define sysfs_printf(file, fmt, ...) \
do { \
if (attr == &sysfs_ ## file) \
return snprintf(buf, PAGE_SIZE, fmt "\n", __VA_ARGS__); \
} while (0)
#define sysfs_print(file, var) \
do { \
if (attr == &sysfs_ ## file) \
return snprint(buf, PAGE_SIZE, var); \
} while (0)
#define sysfs_hprint(file, val) \
do { \
if (attr == &sysfs_ ## file) { \
ssize_t ret = hprint(buf, val); \
strcat(buf, "\n"); \
return ret + 1; \
} \
} while (0)
#define var_printf(_var, fmt) sysfs_printf(_var, fmt, var(_var))
#define var_print(_var) sysfs_print(_var, var(_var))
#define var_hprint(_var) sysfs_hprint(_var, var(_var))
#define sysfs_strtoul(file, var) \
do { \
if (attr == &sysfs_ ## file) \
return strtoul_safe(buf, var) ?: (ssize_t) size; \
} while (0)
#define sysfs_strtoul_clamp(file, var, min, max) \
do { \
if (attr == &sysfs_ ## file) \
return strtoul_safe_clamp(buf, var, min, max) \
?: (ssize_t) size; \
} while (0)
#define strtoul_or_return(cp) \
({ \
unsigned long _v; \
int _r = kstrtoul(cp, 10, &_v); \
if (_r) \
return _r; \
_v; \
})
#define strtoi_h_or_return(cp, v) \
do { \
int _r = strtoi_h(cp, &v); \
if (_r) \
return _r; \
} while (0)
#define sysfs_hatoi(file, var) \
do { \
if (attr == &sysfs_ ## file) \
return strtoi_h(buf, &var) ?: (ssize_t) size; \
} while (0)
#endif /* _BCACHE_SYSFS_H_ */
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