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From: David Howells <dhowells@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: dhowells@redhat.com, linux-ext4@vger.kernel.org,
	linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Could we get an IOCB_NO_READ_HOLE?
Date: Fri, 17 Sep 2021 11:27:43 +0100	[thread overview]
Message-ID: <2315872.1631874463@warthog.procyon.org.uk> (raw)

Hi Christoph,

Would it be possible to get an IOCB_NO_READ_HOLE flag that causes a read to
either fail entirely if there's a hole in the file or to stop at the hole,
possibly returning -ENODATA if the hole is at the front of the file?

Looking at iomap_dio_iter(), IOMAP_HOLE should be enabled in
iomap_iter::iomap.type for this?  Is it that simple?

David


             reply	other threads:[~2021-09-17 10:27 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-17 10:27 David Howells [this message]
2021-09-17 10:43 ` Could we get an IOCB_NO_READ_HOLE? David Howells
2021-09-17 11:04   ` Christoph Hellwig

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