From: Al Viro <[email protected]>
To: "Eric W. Biederman" <[email protected]>
Cc: Dmitry Kadashev <[email protected]>,
Jens Axboe <[email protected]>, io-uring <[email protected]>,
[email protected]
Subject: Re: [PATCH 1/2] fs: make do_mkdirat() take struct filename
Date: Wed, 31 Mar 2021 16:46:27 +0000 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On Wed, Mar 31, 2021 at 11:28:04AM -0500, Eric W. Biederman wrote:
> Al Viro <[email protected]> writes:
>
> > On Mon, Feb 01, 2021 at 03:00:42PM +0000, Al Viro wrote:
> >
> >> The last one is the easiest to answer - we want to keep the imported strings
> >> around for audit. It's not so much a proper refcounting as it is "we might
> >> want freeing delayed" implemented as refcount.
> >
> > BTW, regarding io_uring + audit interactions - just how is that supposed to
> > work if you offload any work that might lead to audit records (on permission
> > checks, etc.) to helper threads?
>
> For people looking into these details. Things have gotten much better
> recently.
>
> The big change is that io_uring helper threads are now proper
> threads of the process that is using io_uring. The io_uring helper
> threads just happen to never execute any userspace code.
audit context is per-thread (as it has to be, obviously - multiple threads
can have overlapping syscalls), so getname()/putname() interplay with that
is still not obvious. I agree that these threads have gotten better,
though.
next prev parent reply other threads:[~2021-03-31 16:47 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-16 4:45 [PATCH 0/2] io_uring: add mkdirat support Dmitry Kadashev
2020-11-16 4:45 ` [PATCH 1/2] fs: make do_mkdirat() take struct filename Dmitry Kadashev
2021-01-25 4:38 ` Jens Axboe
2021-01-26 22:55 ` Al Viro
2021-02-01 11:09 ` Dmitry Kadashev
2021-02-01 15:00 ` Al Viro
2021-02-01 15:29 ` Al Viro
2021-03-31 16:28 ` Eric W. Biederman
2021-03-31 16:46 ` Al Viro [this message]
2021-02-02 4:39 ` Dmitry Kadashev
2020-11-16 4:45 ` [PATCH 2/2] io_uring: add support for IORING_OP_MKDIRAT Dmitry Kadashev
2020-12-04 10:57 ` [PATCH 0/2] io_uring: add mkdirat support Dmitry Kadashev
2020-12-15 11:43 ` Dmitry Kadashev
2020-12-15 16:20 ` Jens Axboe
2020-12-16 6:05 ` Dmitry Kadashev
2021-01-20 8:21 ` Dmitry Kadashev
2021-01-26 22:35 ` Jens Axboe
2021-01-27 11:06 ` Dmitry Kadashev
2021-01-27 16:22 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2020-11-11 13:25 Dmitry Kadashev
2020-11-11 13:25 ` [PATCH 1/2] fs: make do_mkdirat() take struct filename Dmitry Kadashev
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