[dm-devel] [PATCH v7 4/6] dax: add DAX_RECOVERY flag and .recovery_write dev_pgmap_ops

[Jane Chu]

On 4/11/2022 10:02 PM, Christoph Hellwig wrote:
> On Mon, Apr 11, 2022 at 09:57:36PM -0700, Dan Williams wrote:
>> So how about change 'int flags' to 'enum dax_access_mode mode' where
>> dax_access_mode is:
>>
>> /**
>>   * enum dax_access_mode - operational mode for dax_direct_access()
>>   * @DAX_ACCESS: nominal access, fail / trim access on encountering poison
>>   * @DAX_RECOVERY_WRITE: ignore poison and provide a pointer suitable
>> for use with dax_recovery_write()
>>   */
>> enum dax_access_mode {
>>      DAX_ACCESS,
>>      DAX_RECOVERY_WRITE,
>> };
>>
>> Then the conversions look like this:
>>
>>   -       rc = dax_direct_access(iter->iomap.dax_dev, pgoff, 1, &kaddr, NULL);
>>   +       rc = dax_direct_access(iter->iomap.dax_dev, pgoff, 1,
>> DAX_ACCESS, &kaddr, NULL);
>>
>> ...and there's less chance of confusion with the @nr_pages argument.
> 
> Yes, this might be a little nicer.

Will do.

Thanks!
-jane