#define __USE_FILE_OFFSET64
#define _XOPEN_SOURCE 500
+#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include "bcache.h"
-
-static void usage()
+void usage()
{
fprintf(stderr, "Usage: bcache-super-show [-f] <device>\n");
}
-
-static bool accepted_char(char c)
-{
- if ('0' <= c && c <= '9')
- return true;
- if ('A' <= c && c <= 'Z')
- return true;
- if ('a' <= c && c <= 'z')
- return true;
- if (strchr(".-_", c))
- return true;
- return false;
-}
-
-static void print_encode(char* in)
-{
- for (char* pos = in; *pos; pos++)
- if (accepted_char(*pos))
- putchar(*pos);
- else
- printf("%%%x", *pos);
-}
-
-
int main(int argc, char **argv)
{
- bool force_csum = false;
int o;
extern char *optarg;
- struct cache_sb sb;
- char uuid[40];
- uint64_t expected_csum;
+ 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) {
exit(2);
}
- if (pread(fd, &sb, sizeof(sb), SB_START) != sizeof(sb)) {
+ if (pread(fd, sb, bytes, SB_START) != bytes) {
fprintf(stderr, "Couldn't read\n");
exit(2);
}
- printf("sb.magic\t\t");
- if (!memcmp(sb.magic, bcache_magic, 16)) {
- printf("ok\n");
- } else {
- printf("bad magic\n");
- fprintf(stderr, "Invalid superblock (bad magic)\n");
- exit(2);
- }
-
- printf("sb.first_sector\t\t%" PRIu64, 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);
- }
+ if (sb->keys) {
+ bytes = sizeof(*sb) + sb->keys * sizeof(uint64_t);
+ sb = malloc(bytes);
- printf("sb.csum\t\t\t%" PRIX64, sb.csum);
- expected_csum = csum_set(&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");
+ if (pread(fd, sb, bytes, SB_START) != bytes) {
+ fprintf(stderr, "Couldn't read\n");
exit(2);
}
}
- printf("sb.version\t\t%" PRIu64, 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?
- return 0;
- }
-
- putchar('\n');
-
- char label[SB_LABEL_SIZE + 1];
- strncpy(label, (char*)sb.label, SB_LABEL_SIZE);
- label[SB_LABEL_SIZE] = '\0';
- printf("dev.label\t\t");
- if (*label)
- print_encode(label);
+ if (!SB_IS_BDEV(sb))
+ show_super_cache(sb, force_csum);
else
- printf("(empty)");
- putchar('\n');
-
- uuid_unparse(sb.uuid, uuid);
- printf("dev.uuid\t\t%s\n", uuid);
-
- printf("dev.sectors_per_block\t%u\n"
- "dev.sectors_per_bucket\t%u\n",
- sb.block_size,
- sb.bucket_size);
-
- if (!SB_IS_BDEV(&sb)) {
- // total_sectors includes the superblock;
- printf("dev.cache.first_sector\t%u\n"
- "dev.cache.cache_sectors\t%ju\n"
- "dev.cache.total_sectors\t%ju\n"
- "dev.cache.ordered\t%s\n"
- "dev.cache.discard\t%s\n"
- "dev.cache.pos\t\t%u\n"
- "dev.cache.replacement\t%ju",
- sb.bucket_size * sb.first_bucket,
- sb.bucket_size * (sb.nbuckets - sb.first_bucket),
- sb.bucket_size * sb.nbuckets,
- CACHE_SYNC(&sb) ? "yes" : "no",
- CACHE_DISCARD(&sb) ? "yes" : "no",
- sb.nr_this_dev,
- CACHE_REPLACEMENT(&sb));
- switch (CACHE_REPLACEMENT(&sb)) {
- case CACHE_REPLACEMENT_LRU:
- printf(" [lru]\n");
- break;
- case CACHE_REPLACEMENT_FIFO:
- printf(" [fifo]\n");
- break;
- case CACHE_REPLACEMENT_RANDOM:
- printf(" [random]\n");
- break;
- default:
- putchar('\n');
- }
-
- } 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.cache_state\t%ju",
- BDEV_STATE(&sb));
- switch (BDEV_STATE(&sb)) {
- case BDEV_STATE_NONE:
- printf(" [detached]\n");
- break;
- case BDEV_STATE_CLEAN:
- printf(" [clean]\n");
- break;
- case BDEV_STATE_DIRTY:
- printf(" [dirty]\n");
- break;
- case BDEV_STATE_STALE:
- printf(" [inconsistent]\n");
- break;
- default:
- putchar('\n');
- }
- }
- putchar('\n');
-
- uuid_unparse(sb.set_uuid, uuid);
- printf("cset.uuid\t\t%s\n", uuid);
+ show_super_backingdev(sb, force_csum);
return 0;
}
projects / bcachefs-tools-debian / blobdiff