linux-kernel - Re: [PATCH v2 3/8] fs: clear or set FMODE

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Message-ID: <YrcQKIruM3w2gGho@infradead.org>
Date:   Sat, 25 Jun 2022 06:39:52 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Christoph Hellwig <hch@...radead.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v2 3/8] fs: clear or set FMODE_LSEEK based on llseek
 function

On Sat, Jun 25, 2022 at 02:29:09PM +0100, Al Viro wrote:
> I wouldn't bet on that - as it is, an ->open() instance can decide
> in some cases to clear FMODE_LSEEK, despite having file_operations
> with non-NULL ->llseek.

The interesting cases here are nonseekable_open and stream_open,
and I don't see why we could not fix this up in the file_operations.