[PATCH 06/17] block: introduce GENHD_FL_HIDDEN

[Hannes Reinecke]

On 10/18/2017 06:52 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 at lst.de>
> ---
>  block/genhd.c         | 53 ++++++++++++++++++++++++++++++++++-----------------
>  include/linux/genhd.h |  1 +
>  2 files changed, 36 insertions(+), 18 deletions(-)
> 
To quote:

On Fri, Oct 06, 2017 at 09:13 AM, Christoph Hellwig wrote:
> On Fri, Oct 06, 2017 at 10:39:50AM +1100, NeilBrown wrote:
[ .. ]
>>
>> There is some precedent for hiding things from /proc/partitions.
>> removable devices like CDROMs are hidden, and you can easily hide
>> individual devices by setting GENHD_FL_SUPPRESS_PARTITION_INFO.
>> We might be able to get that through.  It is certainly worth writing
>> a patch and letting people experiment with it.
>
> No way in hell this would get through.  Preemptive NAK right here.
>
> That whole idea is just amazingly stupid, and no one has even
> explained a reason for it.

I wonder what has changed ...

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
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