From: Jens Axboe <axboe@kernel.dk>
To: linux-block@vger.kernel.org
Cc: jmoyer@redhat.com
Subject: [PATCHSET v2] io_uring: support fileset add/remove/modify
Date: Fri, 4 Oct 2019 10:22:20 -0600 [thread overview]
Message-ID: <20191004162222.10390-1-axboe@kernel.dk> (raw)
Currently we only support registrering a fixed file set. If changes need
to be made to that set, the application must unregister the existing set
first, then register a new one.
This patchset adds support for sparse file sets (patch 1), which means
the application can register a fileset with room for expansion. This is
done through having unregistered slots use fd == -1.
On top of that, we can add IORING_REGISTER_FILES_UPDATE. This allows
modifying the existing file set through:
- Replacing empty slots with valid file descriptors
- Replacing valid descriptors with an empty slot
- Modifying an existing slot, replacing a file descriptor with a new one
--
Jens Axboe
next reply other threads:[~2019-10-04 16:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-04 16:22 Jens Axboe [this message]
2019-10-04 16:22 ` [PATCH 1/2] io_uring: allow sparse fixed file sets Jens Axboe
2019-10-04 16:22 ` [PATCH 2/2] io_uring: add support for IORING_REGISTER_FILES_UPDATE Jens Axboe
2019-10-04 18:17 ` [PATCHSET v2] io_uring: support fileset add/remove/modify Jeff Moyer
2019-10-04 18:52 ` Jens Axboe
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