Re: [PATCH 2/2] dm: Check for forbidden splitting of emulated zone append operations

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On 6/11/25 12:28 PM, Christoph Hellwig wrote:
> On Wed, Jun 11, 2025 at 10:13:40AM +0900, Damien Le Moal wrote:
>> @@ -1322,6 +1323,7 @@ void dm_accept_partial_bio(struct bio *bio, unsigned int n_sectors)
>>  	BUG_ON(dm_tio_flagged(tio, DM_TIO_IS_DUPLICATE_BIO));
>>  	BUG_ON(op_is_zone_mgmt(bio_op(bio)));
>>  	BUG_ON(bio_op(bio) == REQ_OP_ZONE_APPEND);
>> +	BUG_ON(bio_flagged(bio, BIO_EMULATES_ZONE_APPEND));
>>  	BUG_ON(bio_sectors > *tio->len_ptr);
>>  	BUG_ON(n_sectors > bio_sectors);
> 
> Shouldn't all these be WARN_ON_ONCE and error return instead?

Yes, I would prefer that, but that would be a more involved cleanup.
I can switch to doing that instead of this simple check.


-- 
Damien Le Moal
Western Digital Research




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