diff options
Diffstat (limited to 'drivers/md/bcache/super.c')
| -rw-r--r-- | drivers/md/bcache/super.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 6f7bc8a8674b..b8013e386c76 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -966,6 +966,7 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c) uint32_t rtime = cpu_to_le32(get_seconds()); struct uuid_entry *u; char buf[BDEVNAME_SIZE]; + struct cached_dev *exist_dc, *t; bdevname(dc->bdev, buf); @@ -989,6 +990,16 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c) return -EINVAL; } + /* Check whether already attached */ + list_for_each_entry_safe(exist_dc, t, &c->cached_devs, list) { + if (!memcmp(dc->sb.uuid, exist_dc->sb.uuid, 16)) { + pr_err("Tried to attach %s but duplicate UUID already attached", + buf); + + return -EINVAL; + } + } + u = uuid_find(c, dc->sb.uuid); if (u && |