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authorAndreas Gruenbacher2021-07-24 12:26:41 +0200
committerAndreas Gruenbacher2021-10-24 15:26:05 +0200
commit4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d (patch)
treeb6468d6e6a3fecb66b4a5e9c46819268bf9289ad /include
parent97308f8b0d867e9ef59528cd97f0db55ffdf5651 (diff)
iomap: Add done_before argument to iomap_dio_rw
Add a done_before argument to iomap_dio_rw that indicates how much of the request has already been transferred. When the request succeeds, we report that done_before additional bytes were tranferred. This is useful for finishing a request asynchronously when part of the request has already been completed synchronously. We'll use that to allow iomap_dio_rw to be used with page faults disabled: when a page fault occurs while submitting a request, we synchronously complete the part of the request that has already been submitted. The caller can then take care of the page fault and call iomap_dio_rw again for the rest of the request, passing in the number of bytes already tranferred. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/iomap.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 2a213b0d1e1f..829f2325ecba 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -339,10 +339,10 @@ struct iomap_dio_ops {
ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
- unsigned int dio_flags);
+ unsigned int dio_flags, size_t done_before);
struct iomap_dio *__iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
- unsigned int dio_flags);
+ unsigned int dio_flags, size_t done_before);
ssize_t iomap_dio_complete(struct iomap_dio *dio);
int iomap_dio_iopoll(struct kiocb *kiocb, bool spin);