Now splice() on O_DIRECT-opened fat file will return -EFAULT, that is
because the default .splice_write, namely default_file_splice_write(),
will construct an ITER_KVEC iov_iter and dio_refill_pages() in dio path
can not handle it.
Fix it by implementing .splice_write through iter_file_splice_write().
Spotted by xfs-tests generic/091.
Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
---
fs/fat/file.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 13935ee99e1e..b3bed32946b1 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -214,6 +214,7 @@ const struct file_operations fat_file_operations = {
#endif
.fsync = fat_file_fsync,
.splice_read = generic_file_splice_read,
+ .splice_write = iter_file_splice_write,
.fallocate = fat_fallocate,
};
--
2.16.2.dirty
