FS needs to add the fmode capability in order to support atomic writes during file open (refer kiocb_set_rw_flags()). Set this capability on a regular file if ext4 can do atomic write. Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx> --- fs/ext4/file.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/file.c b/fs/ext4/file.c index a7b9b9751a3f..8116bd78910b 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -898,6 +898,9 @@ static int ext4_file_open(struct inode *inode, struct file *filp) return ret; } + if (S_ISREG(inode->i_mode) && ext4_can_atomic_write(inode->i_sb)) + filp->f_mode |= FMODE_CAN_ATOMIC_WRITE; + filp->f_mode |= FMODE_NOWAIT | FMODE_CAN_ODIRECT; return dquot_file_open(inode, filp); } -- 2.46.0
