diff options
| author | Alex Elder <elder@inktank.com> | 2012-08-10 13:12:07 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-17 08:51:18 -0800 |
| commit | a871375b5548cbcd28c9b97040da7f6470a96a72 (patch) | |
| tree | d023d8a3ce7956c9fb0ae7b35d056881437e720f | |
| parent | 2c130889f540f0bc6bc866d436b2ec3a23ea8f2b (diff) | |
rbd: drop dev reference on error in rbd_open()
If a read-only rbd device is opened for writing in rbd_open(), it
returns without dropping the just-acquired device reference.
Fix this by moving the read-only check before getting the reference.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
(cherry picked from commit 340c7a2b2c9a2da640af28a8c196356484ac8b50)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/block/rbd.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 52e295defb9..c05a4ab47e5 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -250,13 +250,12 @@ static int rbd_open(struct block_device *bdev, fmode_t mode) { struct rbd_device *rbd_dev = bdev->bd_disk->private_data; - rbd_get_dev(rbd_dev); - - set_device_ro(bdev, rbd_dev->read_only); - if ((mode & FMODE_WRITE) && rbd_dev->read_only) return -EROFS; + rbd_get_dev(rbd_dev); + set_device_ro(bdev, rbd_dev->read_only); + return 0; } |