[PATCH 4/5] btrfs: fallback to buffered io for verity files

[Boris Burkov]

Reading the contents with direct IO would circumvent verity checks, so
fallback to buffered reads. For what it's worth, this is how ext4
handles it as well.

Signed-off-by: Boris Burkov <bo...@bur.io>
---
 fs/btrfs/file.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 6c08bca09d62..a4a2c9c9fcf0 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -3621,6 +3621,9 @@ static ssize_t btrfs_direct_read(struct kiocb *iocb, 
struct iov_iter *to)
        struct inode *inode = file_inode(iocb->ki_filp);
        ssize_t ret;
 
+       if (fsverity_active(inode))
+               return 0;
+
        if (check_direct_read(btrfs_sb(inode->i_sb), to, iocb->ki_pos))
                return 0;
 
-- 
2.24.1