diff options
Diffstat (limited to 'drivers/block/rbd.c')
| -rw-r--r-- | drivers/block/rbd.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index bb7f436b1765..ae65fac2c42b 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -481,6 +481,12 @@ static void rbd_coll_release(struct kref *kref) kfree(coll); } +static bool rbd_dev_ondisk_valid(struct rbd_image_header_ondisk *ondisk) +{ + return !memcmp(&ondisk->text, + RBD_HEADER_TEXT, sizeof (RBD_HEADER_TEXT)); +} + /* * Create a new header structure, translate header format from the on-disk * header. @@ -492,7 +498,7 @@ static int rbd_header_from_disk(struct rbd_image_header *header, { u32 i, snap_count; - if (memcmp(ondisk, RBD_HEADER_TEXT, sizeof(RBD_HEADER_TEXT))) + if (!rbd_dev_ondisk_valid(ondisk)) return -ENXIO; snap_count = le32_to_cpu(ondisk->snap_count); |