diff mbox series

[5/7] fs: Block writes to mounted block devices

Message ID 20231101174325.10596-5-jack@suse.cz (mailing list archive)
State New
Headers show
Series block: Add config option to not allow writing to mounted devices | expand

Commit Message

Jan Kara Nov. 1, 2023, 5:43 p.m. UTC 
Ask block layer to block writes to block devices mounted by filesystems.

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

Comments

Christian Brauner Nov. 6, 2023, 2:32 p.m. UTC | #1 
On Wed, Nov 01, 2023 at 06:43:10PM +0100, Jan Kara wrote:
> Ask block layer to block writes to block devices mounted by filesystems.
> 
> Signed-off-by: Jan Kara <jack@suse.cz>
> ---

Looks good to me,
Reviewed-by: Christian Brauner <brauner@kernel.org>
diff mbox series

Patch

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0e0c0186aa32..9f6c3373f9fc 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1494,7 +1494,8 @@  extern const struct blk_holder_ops fs_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_RESTRICT_WRITES | \
+	 (((flags) & SB_RDONLY) ? 0 : BLK_OPEN_WRITE))
 
 struct bdev_handle {
 	struct block_device *bdev;