IO-Uring Archive on lore.kernel.org
 help / color / Atom feed
From: William Dauchy <wdauchy@gmail.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: io-uring@vger.kernel.org
Subject: Re: SQPOLL behaviour with openat
Date: Sat, 4 Jan 2020 17:41:50 +0100
Message-ID: <CAJ75kXZdwF4x0Od9BE5OD0vxbkuKR2UDHSfjaQ-yhjUkpx=r2A@mail.gmail.com> (raw)
In-Reply-To: <fad9c723-88ed-355f-6938-71db6db948b4@kernel.dk>

Hello Jens,

Thank you for the quick answer.

On Sat, Jan 4, 2020 at 5:28 PM Jens Axboe <axboe@kernel.dk> wrote:
> sqpoll requires the use of fixed files for any sqe, at least for now.
> That's why it returns -EBADF if the request doesn't have fixed files
> specified.

 I indeed forgot sqe->flags |= IOSQE_FIXED_FILE; in my modified test.

> So it cannot be used with opcodes that create (or close) file
> descriptors either.

ok, I thought `dirfd` could have been the index of my registered fd
for `openat` call. It was not very clear to me this was not possible
to use fixed files for those opcodes.

Thanks,
-- 
William

  reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-04 16:22 wdauchy
2020-01-04 16:28 ` Jens Axboe
2020-01-04 16:41   ` William Dauchy [this message]
2020-01-04 17:41     ` Jens Axboe

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAJ75kXZdwF4x0Od9BE5OD0vxbkuKR2UDHSfjaQ-yhjUkpx=r2A@mail.gmail.com' \
    --to=wdauchy@gmail.com \
    --cc=axboe@kernel.dk \
    --cc=io-uring@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

IO-Uring Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/io-uring/0 io-uring/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 io-uring io-uring/ https://lore.kernel.org/io-uring \
		io-uring@vger.kernel.org
	public-inbox-index io-uring

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.io-uring


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git