diff options
| -rw-r--r-- | drivers/block/rbd.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index d0328835bbd9..4734446c3b5b 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -533,6 +533,16 @@ static bool rbd_dev_ondisk_valid(struct rbd_image_header_ondisk *ondisk) if (memcmp(&ondisk->text, RBD_HEADER_TEXT, sizeof (RBD_HEADER_TEXT))) return false; + /* The bio layer requires at least sector-sized I/O */ + + if (ondisk->options.order < SECTOR_SHIFT) + return false; + + /* If we use u64 in a few spots we may be able to loosen this */ + + if (ondisk->options.order > 8 * sizeof (int) - 1) + return false; + /* * The size of a snapshot header has to fit in a size_t, and * that limits the number of snapshots. |