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author | Andreas Gruenbacher <agruenba@redhat.com> | 2021-07-24 12:26:41 +0200 |
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committer | Andreas Gruenbacher <agruenba@redhat.com> | 2021-10-24 15:26:05 +0200 |
commit | 4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d (patch) | |
tree | b6468d6e6a3fecb66b4a5e9c46819268bf9289ad /include | |
parent | 97308f8b0d867e9ef59528cd97f0db55ffdf5651 (diff) | |
download | linux-stable-4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d.tar.gz linux-stable-4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d.tar.bz2 linux-stable-4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d.zip |
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.h | 4 |
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); |