From: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com> mainline inclusion from mainline-v6.12-rc1 commit b7987a7d69a4a17b7f334f5c100d6729ebcc2ccb category: feature bugzilla: https://atomgit.com/src-openeuler/kernel/issues/8862 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- 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. Reviewed-by: John Garry <john.g.garry@oracle.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Conflicts: fs/ext4/file.c [Context Conflicts] Signed-off-by: Long Li <leo.lilong@huawei.com> --- fs/ext4/file.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/file.c b/fs/ext4/file.c index f22530345254..3896883f7659 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -939,6 +939,9 @@ static int ext4_file_open(struct inode *inode, struct file *filp) return ret; } + if (ext4_inode_can_atomic_write(inode)) + filp->f_mode |= FMODE_CAN_ATOMIC_WRITE; + filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC | FMODE_DIO_PARALLEL_WRITE; return dquot_file_open(inode, filp); -- 2.52.0