// SPDX-License-Identifier: GPL-2.0/* * Feature set bits and string conversion. * Inspired by ext4's features compat/incompat/ro_compat related code. * * Copyright 2020 Coly Li <colyli@suse.de> * */#include "bcache_ondisk.h"#include "bcache.h"#include "features.h" struct feature {	int		compat;	unsigned int	mask;	const char	*string;}; static struct feature feature_list[] = {	{BCH_FEATURE_INCOMPAT, BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE,		"large_bucket"},	{0, 0, NULL },}; #define compose_feature_string(type)				\({									\	struct feature *f;						\	bool first = true;						\									\	for (f = &feature_list[0]; f->compat != 0; f++) {		\		if (f->compat != BCH_FEATURE_ ## type)			\			continue;					\		if (BCH_HAS_ ## type ## _FEATURE(&c->cache->sb, f->mask)) {	\			if (first) {					\				out += snprintf(out, buf + size - out,	\						"[");	\			} else {					\				out += snprintf(out, buf + size - out,	\						" [");			\			}						\		} else if (!first) {					\			out += snprintf(out, buf + size - out, " ");	\		}							\									\		out += snprintf(out, buf + size - out, "%s", f->string);\									\		if (BCH_HAS_ ## type ## _FEATURE(&c->cache->sb, f->mask))	\			out += snprintf(out, buf + size - out, "]");	\									\		first = false;						\	}								\	if (!first)							\		out += snprintf(out, buf + size - out, "\n");		\}) int bch_print_cache_set_feature_compat(struct cache_set *c, char *buf, int size){	char *out = buf;	compose_feature_string(COMPAT);	return out - buf;} int bch_print_cache_set_feature_ro_compat(struct cache_set *c, char *buf, int size){	char *out = buf;	compose_feature_string(RO_COMPAT);	return out - buf;} int bch_print_cache_set_feature_incompat(struct cache_set *c, char *buf, int size){	char *out = buf;	compose_feature_string(INCOMPAT);	return out - buf;}