linux-kernel - RE: [RFC PATCH] io_uring: add support for IORING_OP

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Message-ID: <a99467bab6d64a7f9057181d979ec563@AcuMS.aculab.com>
Date:   Sun, 24 Jan 2021 22:21:38 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Lennert Buytenhek' <buytenh@...tstofly.org>,
        Jens Axboe <axboe@...nel.dk>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "io-uring@...r.kernel.org" <io-uring@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>
Subject: RE: [RFC PATCH] io_uring: add support for IORING_OP_GETDENTS64

> One open question is whether IORING_OP_GETDENTS64 should be more like
> pread(2) and allow passing in a starting offset to read from the
> directory from.  (This would require some more surgery in fs/readdir.c.)

Since directories are seekable this ought to work.
Modulo horrid issues with 32bit file offsets.

You'd need to return the final offset to allow another
read to continue from the end position.

	David

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