/* SPDX-License-Identifier: GPL-2.0 */ #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, 0200) #define read_attribute(n) __sysfs_attribute(n, 0444) #define rw_attribute(n) __sysfs_attribute(n, 0644) #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 = bch_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_ */