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super-show: print cache mode (writethrough, writeback, writearound, none)

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This commit is contained in:
Gabriel 2013-05-01 19:15:18 +02:00
parent af6e3f1c74
commit 315ab92e58
3 changed files with 50 additions and 17 deletions
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45
bcache-super-show.c
View File

@ -137,20 +137,39 @@ int main(int argc, char **argv)
sb.bucket_size * sb.nbuckets,
CACHE_DISCARD(&sb) ? "yes" : "no",
sb.nr_this_dev);
} else if (sb.version == BCACHE_SB_VERSION_BDEV) {
printf("dev.data.first_sector\t%u\n"
"dev.data.writeback\t%s\n",
BDEV_DATA_START_DEFAULT,
BDEV_WRITEBACK(&sb) ? "yes" : "no");
} else if (sb.version == BCACHE_SB_VERSION_BDEV_WITH_OFFSET) {
if (sb.keys == 1 || sb.d[0]) {
fprintf(stderr, "Possible experimental format detected, bailing\n");
exit(3);
} else {
uint64_t first_sector;
if (sb.version == BCACHE_SB_VERSION_BDEV) {
first_sector = BDEV_DATA_START_DEFAULT;
} else {
if (sb.keys == 1 || sb.d[0]) {
fprintf(stderr,
"Possible experimental format detected, bailing\n");
exit(3);
}
first_sector = sb.data_offset;
}
printf("dev.data.first_sector\t%ju\n"
"dev.data.cache_mode\t%ju",
first_sector,
BDEV_CACHE_MODE(&sb));
switch (BDEV_CACHE_MODE(&sb)) {
case CACHE_MODE_WRITETHROUGH:
printf(" [writethrough]\n");
break;
case CACHE_MODE_WRITEBACK:
printf(" [writeback]\n");
break;
case CACHE_MODE_WRITEAROUND:
printf(" [writearound]\n");
break;
case CACHE_MODE_NONE:
printf(" [no caching]\n");
break;
default:
putchar('\n');
}
printf("dev.data.first_sector\t%lu\n"
"dev.data.writeback\t%s\n",
sb.data_offset,
BDEV_WRITEBACK(&sb) ? "yes" : "no");
}
putchar('\n');

19
bcache.h
View File

@ -91,10 +91,23 @@ static inline bool SB_IS_BDEV(const struct cache_sb *sb)
|| sb->version == BCACHE_SB_VERSION_BDEV_WITH_OFFSET;
}
BITMASK(BDEV_WRITEBACK, struct cache_sb, flags, 0, 1);
BITMASK(CACHE_SYNC, struct cache_sb, flags, 0, 1);
BITMASK(CACHE_DISCARD, struct cache_sb, flags, 1, 1);
BITMASK(CACHE_REPLACEMENT, struct cache_sb, flags, 2, 3);
#define CACHE_REPLACEMENT_LRU 0U
#define CACHE_REPLACEMENT_FIFO 1U
#define CACHE_REPLACEMENT_RANDOM 2U
BITMASK(CACHE_DISCARD, struct cache_sb, flags, 1, 1);
BITMASK(CACHE_REPLACEMENT, struct cache_sb, flags, 2, 3);
BITMASK(BDEV_CACHE_MODE, struct cache_sb, flags, 0, 4);
#define CACHE_MODE_WRITETHROUGH 0U
#define CACHE_MODE_WRITEBACK 1U
#define CACHE_MODE_WRITEAROUND 2U
#define CACHE_MODE_NONE 3U
BITMASK(BDEV_STATE, struct cache_sb, flags, 61, 2);
#define BDEV_STATE_NONE 0U
#define BDEV_STATE_CLEAN 1U
#define BDEV_STATE_DIRTY 2U
#define BDEV_STATE_STALE 3U
inline uint64_t crc64(const void *_data, size_t len);

3
make-bcache.c
View File

@ -192,7 +192,8 @@ static void write_sb(char *dev, unsigned block_size, unsigned bucket_size,
uuid_unparse(sb.set_uuid, set_uuid_str);
if (SB_IS_BDEV(&sb)) {
SET_BDEV_WRITEBACK(&sb, writeback);
SET_BDEV_CACHE_MODE(
&sb, writeback ? CACHE_MODE_WRITEBACK : CACHE_MODE_WRITETHROUGH);
if (data_offset != BDEV_DATA_START_DEFAULT) {
sb.version = BCACHE_SB_VERSION_BDEV_WITH_OFFSET;