On Thu, Jul 23, 2020 at 09:37:40AM -0400, Colin Walters wrote:
> On Tue, Jul 21, 2020, at 11:58 AM, Stefano Garzarella wrote:
>
> > my use case concerns virtualization. The idea, that I described in the
> > proposal of io-uring restrictions [1], is to share io_uring CQ and SQ queues
> > with a
On Tue, Jul 21, 2020, at 11:58 AM, Stefano Garzarella wrote:
> my use case concerns virtualization. The idea, that I described in the
> proposal of io-uring restrictions [1], is to share io_uring CQ and SQ queues
> with a guest VM for block operations.
Virtualization being a strong security
On Tue, Jul 21, 2020 at 05:58:48PM +0200, Stefano Garzarella wrote:
> On Tue, Jul 21, 2020 at 08:27:34AM -0700, Andy Lutomirski wrote:
> > On Fri, Jul 17, 2020 at 1:02 AM Stefano Garzarella
> > wrote:
> > >
> > > On Thu, Jul 16, 2020 at 08:12:35AM -0700, Kees Cook wrote:
> > > > On Thu, Jul 16,
Hi,
On 2020-07-21 12:44:09 -0700, Andy Lutomirski wrote:
> Can you enlighten me? I don't see any iov_iter_get_pages() calls or
> equivalents. If an IO is punted, how does the data end up in the
> io_uring_enter() caller's mm?
For operations needing that io_op_def.needs_mm is true. Which is
On 7/21/20 1:44 PM, Andy Lutomirski wrote:
> On Tue, Jul 21, 2020 at 11:39 AM Jens Axboe wrote:
>>
>> On 7/21/20 11:44 AM, Andy Lutomirski wrote:
>>> On Tue, Jul 21, 2020 at 10:30 AM Jens Axboe wrote:
On 7/21/20 11:23 AM, Andy Lutomirski wrote:
> On Tue, Jul 21, 2020 at 8:31 AM
On Tue, Jul 21, 2020 at 11:39 AM Jens Axboe wrote:
>
> On 7/21/20 11:44 AM, Andy Lutomirski wrote:
> > On Tue, Jul 21, 2020 at 10:30 AM Jens Axboe wrote:
> >>
> >> On 7/21/20 11:23 AM, Andy Lutomirski wrote:
> >>> On Tue, Jul 21, 2020 at 8:31 AM Jens Axboe wrote:
>
> On 7/21/20 9:27
Hi,
On 2020-07-21 10:23:22 -0700, Andy Lutomirski wrote:
> Andres, how final is your Postgres branch?
Not final at all. Some of the constraints like needing to submit/receive
completions to/from multiple processes are pretty immovable though.
> I'm wondering if we could get away with requiring
On 7/21/20 11:44 AM, Andy Lutomirski wrote:
> On Tue, Jul 21, 2020 at 10:30 AM Jens Axboe wrote:
>>
>> On 7/21/20 11:23 AM, Andy Lutomirski wrote:
>>> On Tue, Jul 21, 2020 at 8:31 AM Jens Axboe wrote:
On 7/21/20 9:27 AM, Andy Lutomirski wrote:
> On Fri, Jul 17, 2020 at 1:02 AM
On Tue, Jul 21, 2020 at 10:30 AM Jens Axboe wrote:
>
> On 7/21/20 11:23 AM, Andy Lutomirski wrote:
> > On Tue, Jul 21, 2020 at 8:31 AM Jens Axboe wrote:
> >>
> >> On 7/21/20 9:27 AM, Andy Lutomirski wrote:
> >>> On Fri, Jul 17, 2020 at 1:02 AM Stefano Garzarella
> >>> wrote:
>
> On
On 7/21/20 11:23 AM, Andy Lutomirski wrote:
> On Tue, Jul 21, 2020 at 8:31 AM Jens Axboe wrote:
>>
>> On 7/21/20 9:27 AM, Andy Lutomirski wrote:
>>> On Fri, Jul 17, 2020 at 1:02 AM Stefano Garzarella
>>> wrote:
On Thu, Jul 16, 2020 at 08:12:35AM -0700, Kees Cook wrote:
> On Thu,
On Tue, Jul 21, 2020 at 8:31 AM Jens Axboe wrote:
>
> On 7/21/20 9:27 AM, Andy Lutomirski wrote:
> > On Fri, Jul 17, 2020 at 1:02 AM Stefano Garzarella
> > wrote:
> >>
> >> On Thu, Jul 16, 2020 at 08:12:35AM -0700, Kees Cook wrote:
> >>> On Thu, Jul 16, 2020 at 03:14:04PM +0200, Stefano
On Tue, Jul 21, 2020 at 08:27:34AM -0700, Andy Lutomirski wrote:
> On Fri, Jul 17, 2020 at 1:02 AM Stefano Garzarella
> wrote:
> >
> > On Thu, Jul 16, 2020 at 08:12:35AM -0700, Kees Cook wrote:
> > > On Thu, Jul 16, 2020 at 03:14:04PM +0200, Stefano Garzarella wrote:
>
> > > access (IIUC) is
On 7/21/20 9:27 AM, Andy Lutomirski wrote:
> On Fri, Jul 17, 2020 at 1:02 AM Stefano Garzarella
> wrote:
>>
>> On Thu, Jul 16, 2020 at 08:12:35AM -0700, Kees Cook wrote:
>>> On Thu, Jul 16, 2020 at 03:14:04PM +0200, Stefano Garzarella wrote:
>
>>> access (IIUC) is possible without actually
On Fri, Jul 17, 2020 at 1:02 AM Stefano Garzarella wrote:
>
> On Thu, Jul 16, 2020 at 08:12:35AM -0700, Kees Cook wrote:
> > On Thu, Jul 16, 2020 at 03:14:04PM +0200, Stefano Garzarella wrote:
> > access (IIUC) is possible without actually calling any of the io_uring
> > syscalls. Is that
Hi!
> > - Why aren't the io_uring syscalls in the man-page git? (It seems like
> > they're in liburing, but that's should document the _library_ not the
> > syscalls, yes?)
>
> I imagine because using the syscall requires specific memory barriers
> which we probably don't want most C programs
On Thu, Jul 16, 2020 at 08:12:35AM -0700, Kees Cook wrote:
> On Thu, Jul 16, 2020 at 03:14:04PM +0200, Stefano Garzarella wrote:
> > On Wed, Jul 15, 2020 at 04:07:00PM -0700, Kees Cook wrote:
> > [...]
> >
> > > Speaking to Stefano's proposal[1]:
> > >
> > > - There appear to be three classes of
> On Jul 15, 2020, at 4:07 PM, Kees Cook wrote:
>
> Earlier Andy Lutomirski wrote:
>> Let’s add some seccomp folks. We probably also want to be able to run
>> seccomp-like filters on io_uring requests. So maybe io_uring should call into
>> seccomp-and-tracing code for each action.
>
> Okay, I'm
On Thu, Jul 16, 2020 at 11:17:55PM +1000, Aleksa Sarai wrote:
> On 2020-07-15, Kees Cook wrote:
> > In the basic case of "I want to run strace", this is really just a
> > creative use of ptrace in that interception is being used only for
> > reporting. Does ptrace need to grow a way to
On Thu, Jul 16, 2020 at 03:14:04PM +0200, Stefano Garzarella wrote:
> On Wed, Jul 15, 2020 at 04:07:00PM -0700, Kees Cook wrote:
> [...]
>
> > Speaking to Stefano's proposal[1]:
> >
> > - There appear to be three classes of desired restrictions:
> > - opcodes for io_uring_register() (which can
On 2020-07-15, Kees Cook wrote:
> Earlier Andy Lutomirski wrote:
> > Let’s add some seccomp folks. We probably also want to be able to run
> > seccomp-like filters on io_uring requests. So maybe io_uring should call
> > into
> > seccomp-and-tracing code for each action.
>
> Okay, I'm finally
+Cc Stefan Hajnoczi
On Wed, Jul 15, 2020 at 04:07:00PM -0700, Kees Cook wrote:
> Earlier Andy Lutomirski wrote:
> > Let’s add some seccomp folks. We probably also want to be able to run
> > seccomp-like filters on io_uring requests. So maybe io_uring should call
> > into
> > seccomp-and-tracing
On Wed, Jul 15, 2020 at 06:11:30PM +0100, Matthew Wilcox wrote:
> On Wed, Jul 15, 2020 at 07:35:50AM -0700, Andy Lutomirski wrote:
> > > On Jul 15, 2020, at 4:12 AM, Miklos Szeredi wrote:
> > > This thread is to discuss the possibility of stracing requests
> > > submitted through io_uring. I'm
Earlier Andy Lutomirski wrote:
> Let’s add some seccomp folks. We probably also want to be able to run
> seccomp-like filters on io_uring requests. So maybe io_uring should call into
> seccomp-and-tracing code for each action.
Okay, I'm finally able to spend time looking at this. And thank you to
On 15/07/2020 23:09, Miklos Szeredi wrote:
> On Wed, Jul 15, 2020 at 9:43 PM Pavel Begunkov wrote:
>>
>> To clear details for those who are not familiar with io_uring:
>>
>> io_uring has a pair of queues, submission (SQ) and completion queues (CQ),
>> both shared between kernel and user spaces.
On Wed, Jul 15, 2020 at 9:43 PM Pavel Begunkov wrote:
>
> To clear details for those who are not familiar with io_uring:
>
> io_uring has a pair of queues, submission (SQ) and completion queues (CQ),
> both shared between kernel and user spaces. The userspace submits requests
> by filling a chunk
On 15/07/2020 20:11, Matthew Wilcox wrote:
> On Wed, Jul 15, 2020 at 07:35:50AM -0700, Andy Lutomirski wrote:
>>> On Jul 15, 2020, at 4:12 AM, Miklos Szeredi wrote:
>>>
>>> Hi,
>
> feff? Are we doing WTF-16 in email now? ;-)
>
>>>
>>> This thread is to discuss the possibility of stracing
On Wed, Jul 15, 2020 at 07:35:50AM -0700, Andy Lutomirski wrote:
> > On Jul 15, 2020, at 4:12 AM, Miklos Szeredi wrote:
> >
> > Hi,
feff? Are we doing WTF-16 in email now? ;-)
> >
> > This thread is to discuss the possibility of stracing requests
> > submitted through io_uring. I'm not
> On Jul 15, 2020, at 4:12 AM, Miklos Szeredi wrote:
>
> Hi,
>
> This thread is to discuss the possibility of stracing requests
> submitted through io_uring. I'm not directly involved in io_uring
> development, so I'm posting this out of interest in using strace on
> processes utilizing
Hi,
This thread is to discuss the possibility of stracing requests
submitted through io_uring. I'm not directly involved in io_uring
development, so I'm posting this out of interest in using strace on
processes utilizing io_uring.
io_uring gives the developer a way to bypass the syscall
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