[PATCH 2/6] fs: Block writes to mounted block devices

[Jan Kara <jack@xxxxxxx>]

Ask block layer to block writes to block devices mounted by filesystems.

Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 include/linux/blkdev.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ca467525e6e4..a1fb90f3887e 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1471,7 +1471,8 @@ struct blk_holder_ops {
  * as stored in sb->s_flags.
  */
 #define sb_open_mode(flags) \
-	(BLK_OPEN_READ | (((flags) & SB_RDONLY) ? 0 : BLK_OPEN_WRITE))
+	(BLK_OPEN_READ | BLK_OPEN_BLOCK_WRITES | \
+	 (((flags) & SB_RDONLY) ? 0 : BLK_OPEN_WRITE))
 
 struct bdev_handle {
 	struct block_device *bdev;
-- 
2.35.3