Re: samba does not work with liburing 2.3

[Stefan Metzmacher <metze@samba.org>]

Am 08.11.22 um 13:56 schrieb Michael Tokarev via samba-technical:
> 08.11.2022 13:25, Michael Tokarev via samba-technical wrote:
>> FWIW, samba built against the relatively new liburing-2.3 does not
>> work right, io_uring-enabled samba just times out in various i/o
>> operations (eg from smbclient) when liburing used at compile time
>> was 2.3. It works fine with liburing 2.2.
> 
> This turned out to be debian packaging issue, but it might affect
> others too. liburing 2.3 breaks ABI by changing layout of the main
> struct io_uring object in a significant way.
> 
> http://bugs.debian.org/1023654

I don't see where this changes the struct size:

-       unsigned pad[4];
+       unsigned ring_mask;
+       unsigned ring_entries;
+
+       unsigned pad[2];

But I see a problem when you compile against 2.3 and run against 2.2
as the new values are not filled.

The problem is the mixture of inline and non-inline functions...

The packaging should make sure it requires the version is build against...

metze