From: Jan Kara <jack@suse.cz> maillist inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8MPXP Reference: https://lore.kernel.org/all/20231101174325.10596-5-jack@suse.cz/ ------------------------------------------- Ask block layer to block writes to block devices mounted by filesystems. Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20231101174325.10596-5-jack@suse.cz Reviewed-by: Christian Brauner <brauner@kernel.org> Reviewed-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com> --- 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 8cbdaa24570a..9f3bcbcb156d 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1479,7 +1479,8 @@ 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; -- 2.31.1