linux-kernel - Re: [PATCH] splice: Fix filemap of a blockdev

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Message-ID: <1842478.1681909280@warthog.procyon.org.uk>
Date:   Wed, 19 Apr 2023 14:01:20 +0100
From:   David Howells <dhowells@...hat.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     dhowells@...hat.com, Ayush Jain <ayush.jain3@....com>,
        Christoph Hellwig <hch@....de>,
        Al Viro <viro@...iv.linux.org.uk>,
        David Hildenbrand <david@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Steve French <stfrench@...rosoft.com>, linux-mm@...ck.org,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] splice: Fix filemap of a blockdev

Note that this shouldn't affect direct_splice_read() as that doesn't look at
the size of the file, but rather just keeps reading from it until the
requested amount is read, the pipe is full or ->read_iter() indicates EOF by
returning 0 (so it could work for copy-splicing from a pipe/socket/chardev
too).

David