iomap: support ioends for direct reads

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Support using the ioend structure to defer I/O completion for direct
reads in addition to writes.  This requires a check for the operation
to not merge reads and writes in iomap_ioend_can_merge.  This support
will be used for bounce buffered direct I/O reads that need to copy
data back to the user address space on read completion.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Tested-by: Anuj Gupta <anuj20.g@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2026-01-26 06:53:44 +01:00 • committed by Jens Axboe

parent c96b8b2202

commit d969bd72cf

1 changed files with 8 additions and 0 deletions

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fs/iomap/ioend.c

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