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142 lines
3.8 KiB
142 lines
3.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _BCACHE_SYSFS_H_ |
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#define _BCACHE_SYSFS_H_ |
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#define KTYPE(type) \ |
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struct kobj_type type ## _ktype = { \ |
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.release = type ## _release, \ |
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.sysfs_ops = &((const struct sysfs_ops) { \ |
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.show = type ## _show, \ |
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.store = type ## _store \ |
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}), \ |
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.default_groups = type ## _groups \ |
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} |
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#define SHOW(fn) \ |
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static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\ |
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char *buf) \ |
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#define STORE(fn) \ |
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static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\ |
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const char *buf, size_t size) \ |
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#define SHOW_LOCKED(fn) \ |
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SHOW(fn) \ |
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{ \ |
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ssize_t ret; \ |
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mutex_lock(&bch_register_lock); \ |
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ret = __ ## fn ## _show(kobj, attr, buf); \ |
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mutex_unlock(&bch_register_lock); \ |
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return ret; \ |
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} |
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#define STORE_LOCKED(fn) \ |
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STORE(fn) \ |
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{ \ |
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ssize_t ret; \ |
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mutex_lock(&bch_register_lock); \ |
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ret = __ ## fn ## _store(kobj, attr, buf, size); \ |
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mutex_unlock(&bch_register_lock); \ |
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return ret; \ |
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} |
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#define __sysfs_attribute(_name, _mode) \ |
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static struct attribute sysfs_##_name = \ |
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{ .name = #_name, .mode = _mode } |
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#define write_attribute(n) __sysfs_attribute(n, 0200) |
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#define read_attribute(n) __sysfs_attribute(n, 0444) |
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#define rw_attribute(n) __sysfs_attribute(n, 0644) |
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#define sysfs_printf(file, fmt, ...) \ |
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do { \ |
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if (attr == &sysfs_ ## file) \ |
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return sysfs_emit(buf, fmt "\n", __VA_ARGS__); \ |
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} while (0) |
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#define sysfs_print(file, var) \ |
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do { \ |
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if (attr == &sysfs_ ## file) \ |
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return sysfs_emit(buf, \ |
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__builtin_types_compatible_p(typeof(var), int) \ |
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? "%i\n" : \ |
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__builtin_types_compatible_p(typeof(var), unsigned int) \ |
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? "%u\n" : \ |
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__builtin_types_compatible_p(typeof(var), long) \ |
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? "%li\n" : \ |
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__builtin_types_compatible_p(typeof(var), unsigned long)\ |
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? "%lu\n" : \ |
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__builtin_types_compatible_p(typeof(var), int64_t) \ |
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? "%lli\n" : \ |
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__builtin_types_compatible_p(typeof(var), uint64_t) \ |
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? "%llu\n" : \ |
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__builtin_types_compatible_p(typeof(var), const char *) \ |
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? "%s\n" : "%i\n", var); \ |
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} while (0) |
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#define sysfs_hprint(file, val) \ |
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do { \ |
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if (attr == &sysfs_ ## file) { \ |
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ssize_t ret = bch_hprint(buf, val); \ |
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strcat(buf, "\n"); \ |
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return ret + 1; \ |
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} \ |
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} while (0) |
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#define var_printf(_var, fmt) sysfs_printf(_var, fmt, var(_var)) |
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#define var_print(_var) sysfs_print(_var, var(_var)) |
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#define var_hprint(_var) sysfs_hprint(_var, var(_var)) |
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#define sysfs_strtoul(file, var) \ |
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do { \ |
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if (attr == &sysfs_ ## file) \ |
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return strtoul_safe(buf, var) ?: (ssize_t) size; \ |
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} while (0) |
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#define sysfs_strtoul_bool(file, var) \ |
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do { \ |
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if (attr == &sysfs_ ## file) { \ |
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unsigned long v = strtoul_or_return(buf); \ |
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\ |
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var = v ? 1 : 0; \ |
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return size; \ |
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} \ |
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} while (0) |
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#define sysfs_strtoul_clamp(file, var, min, max) \ |
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do { \ |
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if (attr == &sysfs_ ## file) { \ |
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unsigned long v = 0; \ |
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ssize_t ret; \ |
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ret = strtoul_safe_clamp(buf, v, min, max); \ |
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if (!ret) { \ |
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var = v; \ |
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return size; \ |
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} \ |
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return ret; \ |
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} \ |
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} while (0) |
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#define strtoul_or_return(cp) \ |
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({ \ |
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unsigned long _v; \ |
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int _r = kstrtoul(cp, 10, &_v); \ |
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if (_r) \ |
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return _r; \ |
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_v; \ |
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}) |
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#define strtoi_h_or_return(cp, v) \ |
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do { \ |
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int _r = strtoi_h(cp, &v); \ |
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if (_r) \ |
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return _r; \ |
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} while (0) |
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#define sysfs_hatoi(file, var) \ |
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do { \ |
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if (attr == &sysfs_ ## file) \ |
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return strtoi_h(buf, &var) ?: (ssize_t) size; \ |
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} while (0) |
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#endif /* _BCACHE_SYSFS_H_ */
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