lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Fri, 21 Oct 2022 10:32:16 +0200
From:   Stefan Metzmacher <>
To:     Pavel Begunkov <>,
        io-uring <>, Jens Axboe <>
Cc:     Jakub Kicinski <>, netdev <>,
        Dylan Yudaken <>

Hi Pavel,

>>>> Experimenting with this stuff lets me wish to have a way to
>>>> have a different 'user_data' field for the notif cqe,
>>>> maybe based on a IORING_RECVSEND_ flag, it may make my life
>>>> easier and would avoid some complexity in userspace...
>>>> As I need to handle retry on short writes even with MSG_WAITALL
>>>> as EINTR and other errors could cause them.
>>>> What do you think?
>> Any comment on this?
>> IORING_SEND_NOTIF_USER_DATA could let us use
>> notif->cqe.user_data = sqe->addr3;
> I'd rather not use the last available u64, tbh, that was the
> reason for not adding a second user_data in the first place.

As far as I can see io_send_zc_prep has this:

         if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3)))
                 return -EINVAL;

both are u64...


Powered by blists - more mailing lists