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authorAndreas Gruenbacher <agruenba@redhat.com>2021-07-24 13:26:41 +0300
committerAndreas Gruenbacher <agruenba@redhat.com>2021-10-24 16:26:05 +0300
commit4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d (patch)
treeb6468d6e6a3fecb66b4a5e9c46819268bf9289ad /fs/zonefs
parent97308f8b0d867e9ef59528cd97f0db55ffdf5651 (diff)
downloadlinux-4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d.tar.xz
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 'fs/zonefs')
-rw-r--r--fs/zonefs/super.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index ddc346a9df9b..6122c38ab44d 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -852,7 +852,7 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from)
ret = zonefs_file_dio_append(iocb, from);
else
ret = iomap_dio_rw(iocb, from, &zonefs_iomap_ops,
- &zonefs_write_dio_ops, 0);
+ &zonefs_write_dio_ops, 0, 0);
if (zi->i_ztype == ZONEFS_ZTYPE_SEQ &&
(ret > 0 || ret == -EIOCBQUEUED)) {
if (ret > 0)
@@ -987,7 +987,7 @@ static ssize_t zonefs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
}
file_accessed(iocb->ki_filp);
ret = iomap_dio_rw(iocb, to, &zonefs_iomap_ops,
- &zonefs_read_dio_ops, 0);
+ &zonefs_read_dio_ops, 0, 0);
} else {
ret = generic_file_read_iter(iocb, to);
if (ret == -EIO)