On Fri, Jul 17, 2020 at 11:06:05AM +0200, Lukas Czerner wrote: > Ext4 uses blkdev_get_by_dev() to get the block_device for journal device > which does check to see if the read-only block device was opened > read-only. > > As a result ext4 will hapily proceed mounting the file system with > external journal on read-only device. This is bad as we would not be > able to use the journal leading to errors later on. > > Instead of simply failing to mount file system in this case, treat it in > a similar way we treat internal journal on read-only device. Allow to > mount with -o noload in read-only mode. Applied, thanks. - Ted
