[PATCH 1/6] xstat: Add a pair of system calls to make extended file stats available

[Andreas Dilger]

On 2012-04-26, at 6:51 PM, Dave Chinner wrote:
> On Thu, Apr 26, 2012 at 02:32:36PM +0100, David Howells wrote:
>> I wonder if there's a way to make this explicit - or is it something that if the bit isn't set, you can't use the value in st_blksize.
>> I wonder if this value always has to be non-zero to make sure existing
>> stat() doesn't explode.
> 
> More likely it probably needs to be non-zero to prevent applications
> doing division by block size from exploding... ;)

Right, and any application which knows it needs the blocksize should
also be requesting it when using the statxat() (or whatever) syscall.

Cheers, Andreas





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