[LTP] [PATCH] block: add BLK_FEAT_LBS to check for PAGE_SIZE limit

[Luis Chamberlain]

On Wed, Mar 12, 2025 at 06:40:53AM +0100, Christoph Hellwig wrote:
> On Tue, Mar 11, 2025 at 10:37:27PM -0700, Luis Chamberlain wrote:
> > > If you need extra per-driver validatation, do it in the driver.
> > 
> > Are you suggesting we just move back the PAGE_SIZE check,
> 
> PAGE_SIZE now is a consumer (i.e. file system) limitation.  Having
> a flag in the provider (driver) does not make sense.
> 
> > or to keep
> > the checks for the block driver limits into each driver?
> 
> Most drivers probably don't have a limit other than than that implicit
> by the field width used for reporting.  So in general the driver should
> not need any checks.  The only exceptions might be for virtual drivers
> where the value comes from userspace, but even then it is a bit doubtful.

Alrighty, so silly tests just need to be updated. If a hang is reported,
we can look into it, or just add block driver checks / limitations.

  Luis