author: Christoph Hellwig <hch@lst.de> 2021-01-23 10:06:10 -0800
committer: Darrick J. Wong <djwong@kernel.org> 2021-01-23 10:22:12 -0800
commit: 213f627104daf8589aad8ee73fcaeb603ab0af15
parent: 2f63296578cad1ae681152d5b2122a4595195f16
Commit Summary:
Diffstat:
1 file changed, 7 insertions, 0 deletions
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index 947343730e2c..65d32364345d 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -485,6 +485,13 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
iomap_flags |= IOMAP_NOWAIT;
}
+ if (dio_flags & IOMAP_DIO_OVERWRITE_ONLY) {
+ ret = -EAGAIN;
+ if (pos >= dio->i_size || pos + count > dio->i_size)
+ goto out_free_dio;
+ iomap_flags |= IOMAP_OVERWRITE_ONLY;
+ }
+
ret = filemap_write_and_wait_range(mapping, pos, end);
if (ret)
goto out_free_dio;