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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576// 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;}