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-rw-r--r--bcache-super-show.c164
1 files changed, 4 insertions, 160 deletions
diff --git a/bcache-super-show.c b/bcache-super-show.c
index 76d8b0a8..f645af68 100644
--- a/bcache-super-show.c
+++ b/bcache-super-show.c
@@ -27,174 +27,18 @@
#include "bcache.h"
-static bool force_csum = false;
-
-static void usage()
+void usage()
{
fprintf(stderr, "Usage: bcache-super-show [-f] <device>\n");
}
-static void print_encode(char *in)
-{
- for (char *pos = in; *pos; pos++)
- if (isalnum(*pos) || strchr(".-_", *pos))
- putchar(*pos);
- else
- printf("%%%x", *pos);
-}
-
-static void show_super_common(struct cache_sb *sb)
-{
- char uuid[40];
- char label[SB_LABEL_SIZE + 1];
- uint64_t expected_csum;
-
- printf("sb.magic\t\t");
- if (!memcmp(&sb->magic, &BCACHE_MAGIC, sizeof(sb->magic))) {
- printf("ok\n");
- } else {
- printf("bad magic\n");
- fprintf(stderr, "Invalid superblock (bad magic)\n");
- exit(2);
- }
-
- printf("sb.first_sector\t\t%ju", (uint64_t) sb->offset);
- if (sb->offset == SB_SECTOR) {
- printf(" [match]\n");
- } else {
- printf(" [expected %ds]\n", SB_SECTOR);
- fprintf(stderr, "Invalid superblock (bad sector)\n");
- exit(2);
- }
-
- printf("sb.csum\t\t\t%ju", (uint64_t) sb->csum);
- expected_csum = csum_set(sb,
- sb->version < BCACHE_SB_VERSION_CDEV_V3
- ? BCH_CSUM_CRC64
- : CACHE_SB_CSUM_TYPE(sb));
- if (sb->csum == expected_csum) {
- printf(" [match]\n");
- } else {
- printf(" [expected %" PRIX64 "]\n", expected_csum);
- if (!force_csum) {
- fprintf(stderr, "Corrupt superblock (bad csum)\n");
- exit(2);
- }
- }
-
- printf("sb.version\t\t%ju", (uint64_t) sb->version);
- switch (sb->version) {
- // These are handled the same by the kernel
- case BCACHE_SB_VERSION_CDEV:
- case BCACHE_SB_VERSION_CDEV_WITH_UUID:
- printf(" [cache device]\n");
- break;
-
- // The second adds data offset support
- case BCACHE_SB_VERSION_BDEV:
- case BCACHE_SB_VERSION_BDEV_WITH_OFFSET:
- printf(" [backing device]\n");
- break;
-
- default:
- printf(" [unknown]\n");
- // exit code?
- exit(EXIT_SUCCESS);
- }
-
- putchar('\n');
-
- strncpy(label, (char *) sb->label, SB_LABEL_SIZE);
- label[SB_LABEL_SIZE] = '\0';
- printf("dev.label\t\t");
- if (*label)
- print_encode(label);
- else
- printf("(empty)");
- putchar('\n');
-
- uuid_unparse(sb->uuid.b, uuid);
- printf("dev.uuid\t\t%s\n", uuid);
-
- uuid_unparse(sb->set_uuid.b, uuid);
- printf("cset.uuid\t\t%s\n", uuid);
-}
-
-static void show_super_backingdev(struct cache_sb *sb)
-{
- uint64_t first_sector;
-
- show_super_common(sb);
-
- 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%s"
- "dev.data.cache_state\t%s\n",
- first_sector,
- bdev_cache_mode[BDEV_CACHE_MODE(sb)],
- bdev_state[BDEV_STATE(sb)]);
-}
-
-static void show_cache_member(struct cache_sb *sb, unsigned i)
-{
- struct cache_member *m = ((struct cache_member *) sb->d) + i;
-
- printf("cache.state\t%s\n", cache_state[CACHE_STATE(m)]);
- printf("cache.tier\t%llu\n", CACHE_TIER(m));
-
- printf("cache.replication_set\t%llu\n", CACHE_REPLICATION_SET(m));
- printf("cache.cur_meta_replicas\t%llu\n", REPLICATION_SET_CUR_META_REPLICAS(m));
- printf("cache.cur_data_replicas\t%llu\n", REPLICATION_SET_CUR_DATA_REPLICAS(m));
-
- printf("cache.has_metadata\t%llu\n", CACHE_HAS_METADATA(m));
- printf("cache.has_data\t%llu\n", CACHE_HAS_DATA(m));
-
- printf("cache.replacement\t%s\n", replacement_policies[CACHE_REPLACEMENT(m)]);
- printf("cache.discard\t%llu\n", CACHE_DISCARD(m));
-}
-
-static void show_super_cache(struct cache_sb *sb)
-{
- show_super_common(sb);
-
- printf("dev.sectors_per_block\t%u\n"
- "dev.sectors_per_bucket\t%u\n",
- sb->block_size,
- sb->bucket_size);
-
- // total_sectors includes the superblock;
- printf("dev.cache.first_sector\t%u\n"
- "dev.cache.cache_sectors\t%llu\n"
- "dev.cache.total_sectors\t%llu\n"
- "dev.cache.ordered\t%s\n"
- "dev.cache.pos\t\t%u\n"
- "dev.cache.setsize\t\t%u\n",
- sb->bucket_size * sb->first_bucket,
- sb->bucket_size * (sb->nbuckets - sb->first_bucket),
- sb->bucket_size * sb->nbuckets,
- CACHE_SYNC(sb) ? "yes" : "no",
- sb->nr_this_dev,
- sb->nr_in_set);
-
- show_cache_member(sb, sb->nr_this_dev);
-}
-
int main(int argc, char **argv)
{
int o;
extern char *optarg;
struct cache_sb sb_stack, *sb = &sb_stack;
size_t bytes = sizeof(*sb);
+ bool force_csum = false;
while ((o = getopt(argc, argv, "f")) != EOF)
switch (o) {
@@ -237,9 +81,9 @@ int main(int argc, char **argv)
}
if (!SB_IS_BDEV(sb))
- show_super_cache(sb);
+ show_super_cache(sb, force_csum);
else
- show_super_backingdev(sb);
+ show_super_backingdev(sb, force_csum);
return 0;
}