Re: Regarding to how ksmbd handles sector size request from windows cllient

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I agree with Christof, don't do anything ZFS-specific here. But I was trying to encourage you to think more broadly about the situation, and hopefully find a compatible solution.

Sector size is mostly about application compatibility. If you don't return anything, the app may break. For example, I bet SQL Server issues that info req, and SQL supports running over SMB. So that's one reason.

Tom.

Mar 30, 2022 7:37:20 PM Namjae Jeon <linkinjeon@xxxxxxxxxx>:

> 2022-03-30 21:09 GMT+09:00, Tom Talpey <tom@xxxxxxxxxx>:
>> On 3/30/2022 3:53 AM, Namjae Jeon wrote:
>>> zfs block size is 128KB, and there is a problem when ksmbd responds to
>>> this value as a sector size to the windows client.
>>> This seems to judge as an error when a Windows client requests sector
>>> size information from the server and receives a value larger than 4KB.
>>> 
>>> If the logical/physical_block_size is obtained from the block layer in
>>> ksmbd, You might think of this as a layer violation.
>>> e.g. i_sb->s_bdev->bd_disk->queue->limits.logical_block_size.
>>> 
>>> So I am confused as to how to fix this issue. and I'd like to hear
>>> your thoughts on how to fix this correctly.
>> This sounds like a problem common to any LVM or RAID layering.
>> What does a Windows server return for a volume on a Storage Space?
> I'm not sure if windows server & ZFS share is possible. samba & ZFS
> respond 512Bytes sector size to client. I don't know why SMB client
> need the disk sector size information from server...
>> Look to that for guidance.
> Okay:)
> 
> Thanks!
>> 
>> Tom.
>> 



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