Re: API break, sysfs "capability" file

Hannes Reinecke
2024-04-18T06:28:05Z

On 4/17/24 17:59, Christoph Hellwig wrote:
> On Wed, Apr 17, 2024 at 05:48:16PM +0200, Lennart Poettering wrote:
>> Block devices with part scanning off are quite common after all,
>> i.e. "losetup" creates them by default like that, and partition block
>> devices themselves have no part scanning on and so on, hence we have
>> to be ablet to operate sanely with them.
>
> Maybe and ioctl to turn on partition scanning if it is currently disabled
> or return an error otherwise would be the better thing? It would
> do the right thing for the most common loop case, and with a bit more
> work could do the right thing for those that more or less disable it
> graciously (ubiblock, drbd, zram) and would just fail for those who are
> so grotty old code and slow devices that we never want to do a partition
> scan (basically old floppy drivers and the Nintendo N64 cartridge driver)
>
>
The world is going to end.
hch suggests an ioctl.

Cheers,

Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
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