Currently UBIFS does not support direct IO, but some applications
blindly use the O_DIRECT flag.
Instead of failing upon open() we can do better and fall back
to buffered IO.
Cc: Dongsheng Yang <yangds.f...@cn.fujitsu.com>
Cc: dedeki...@gmail.com
Suggested-by: Dave Chinner <da...@fromorbit.com>
Signed-off-by: Richard Weinberger <rich...@nod.at>
---
fs/ubifs/file.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index a3dfe2a..a61fe86 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1540,6 +1540,15 @@ static int ubifs_file_mmap(struct file *file, struct
vm_area_struct *vma)
return 0;
}
+/*
+ * For now fall back to buffered IO.
+ */
+static ssize_t ubifs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+ loff_t offset)
+{
+ return 0;
+}
+
const struct address_space_operations ubifs_file_address_operations = {
.readpage = ubifs_readpage,
.writepage = ubifs_writepage,
@@ -1548,6 +1557,7 @@ const struct address_space_operations
ubifs_file_address_operations = {
.invalidatepage = ubifs_invalidatepage,
.set_page_dirty = ubifs_set_page_dirty,
.releasepage = ubifs_releasepage,
+ .direct_IO = ubifs_direct_IO,
};
const struct inode_operations ubifs_file_inode_operations = {
--
1.8.4.5
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