On 10/23/2017 04:51 PM, Christoph Hellwig wrote: > With this flag a driver can create a gendisk that can be used for I/O > submission inside the kernel, but which is not registered as user > facing block device. This will be useful for the NVMe multipath > implementation. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > --- > block/genhd.c | 57 +++++++++++++++++++++++++++++++++++---------------- > include/linux/genhd.h | 1 + > 2 files changed, 40 insertions(+), 18 deletions(-) > Can we have some information in sysfs to figure out if a gendisk is hidden? I'd hate having to do an inverse lookup in /proc/partitions; it's always hard to prove that something is _not_ present. And we already present various information (like disk_removable_show()), so it's not without precedent. And it would make integration with systemd/udev easier. Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg)
