linux-kernel - Re: [PATCH v6 01/34] vfs: Unconditionally set IOCB_WRITE in call_write

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Message-ID: <2330920.1673944104@warthog.procyon.org.uk>
Date:   Tue, 17 Jan 2023 08:28:24 +0000
From:   David Howells <dhowells@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     dhowells@...hat.com, Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.cz>,
        Jeff Layton <jlayton@...nel.org>,
        Logan Gunthorpe <logang@...tatee.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 01/34] vfs: Unconditionally set IOCB_WRITE in call_write_iter()

Christoph Hellwig <hch@...radead.org> wrote:

> I suspect the best is to:
> 
>  - rename init_sync_kiocb to init_kiocb
>  - pass a new argument for the destination

Do you mean the direction rather than the destination?

>    to it.  I'm not entirely
>    sure if flags is a good thing, or an explicit READ/WRITE might be
>    better because it's harder to get wrong, even if a the compiler
>    might generate worth code for it.
>  - also use it in the async callers (io_uring, aio, overlayfs, loop,
>    nvmet, target, cachefs, file backed swap)

David