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iomap: Support partial direct I/O on user copy failures
authorAndreas Gruenbacher <agruenba@redhat.com>
Thu, 22 Jul 2021 23:59:41 +0000 (01:59 +0200)
committerAndreas Gruenbacher <agruenba@redhat.com>
Sun, 24 Oct 2021 13:26:05 +0000 (15:26 +0200)
commitca742e6ee0930ce4f2e729a26844ded5094fd953
treeddf419571b6bf50ea98c445d822627b24a5fbb0btree | snapshot
parente19da83877a893b477a722e9ece7afc53a965a75commit | diff
iomap: Support partial direct I/O on user copy failures

In iomap_dio_rw, when iomap_apply returns an -EFAULT error and the
IOMAP_DIO_PARTIAL flag is set, complete the request synchronously and
return a partial result.  This allows the caller to deal with the page
fault and retry the remainder of the request.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
fs/iomap/direct-io.c diff | blob | history
include/linux/iomap.h diff | blob | history
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