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bcache: add more accurate error messages in read_super()

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Previous code only returns "Not a bcache superblock" for both bcache
super block offset and magic error. This patch addss more accurate error
messages,
- for super block unmatched offset:
  "Not a bcache superblock (bad offset)"
- for super block unmatched magic number:
  "Not a bcache superblock (bad magic)"

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Coly Li 2019-11-13 16:03:18 +08:00 committed by Jens Axboe
parent 2d8869518a
commit aaf8dbeab5
1 changed files with 2 additions and 1 deletions
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3
drivers/md/bcache/super.c
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@ -92,10 +92,11 @@ static const char *read_super(struct cache_sb *sb, struct block_device *bdev,
pr_debug("read sb version %llu, flags %llu, seq %llu, journal size %u",
sb->version, sb->flags, sb->seq, sb->keys);
err = "Not a bcache superblock";
err = "Not a bcache superblock (bad offset)";
if (sb->offset != SB_SECTOR)
goto err;
err = "Not a bcache superblock (bad magic)";
if (memcmp(sb->magic, bcache_magic, 16))
goto err;