4265 static unsigned int recalc_flags(struct mount_kattr *kattr, struct mount *mnt)  in recalc_flags()  argument
4270 	flags &= ~kattr->attr_clr;  in recalc_flags()
4272 	flags |= kattr->attr_set;  in recalc_flags()
4277 static int can_idmap_mount(const struct mount_kattr *kattr, struct mount *mnt)  in can_idmap_mount()  argument
4282 	if (!kattr->mnt_idmap)  in can_idmap_mount()
4289 	if (!check_fsmapping(kattr->mnt_idmap, m->mnt_sb))  in can_idmap_mount()
4324 static inline bool mnt_allow_writers(const struct mount_kattr *kattr,  in mnt_allow_writers()  argument
4327 	return (!(kattr->attr_set & MNT_READONLY) ||  in mnt_allow_writers()
4329 	       !kattr->mnt_idmap;  in mnt_allow_writers()
4332 static int mount_setattr_prepare(struct mount_kattr *kattr, struct mount *mnt)  in mount_setattr_prepare()  argument
4338 		if (!can_change_locked_flags(m, recalc_flags(kattr, m))) {  in mount_setattr_prepare()
4343 		err = can_idmap_mount(kattr, m);  in mount_setattr_prepare()
4347 		if (!mnt_allow_writers(kattr, m)) {  in mount_setattr_prepare()
4353 		if (!kattr->recurse)  in mount_setattr_prepare()
4381 static void do_idmap_mount(const struct mount_kattr *kattr, struct mount *mnt)  in do_idmap_mount()  argument
4383 	if (!kattr->mnt_idmap)  in do_idmap_mount()
4394 	smp_store_release(&mnt->mnt.mnt_idmap, mnt_idmap_get(kattr->mnt_idmap));  in do_idmap_mount()
4397 static void mount_setattr_commit(struct mount_kattr *kattr, struct mount *mnt)  in mount_setattr_commit()  argument
4404 		do_idmap_mount(kattr, m);  in mount_setattr_commit()
4405 		flags = recalc_flags(kattr, m);  in mount_setattr_commit()
4412 		if (kattr->propagation)  in mount_setattr_commit()
4413 			change_mnt_propagation(m, kattr->propagation);  in mount_setattr_commit()
4414 		if (!kattr->recurse)  in mount_setattr_commit()
4420 static int do_mount_setattr(struct path *path, struct mount_kattr *kattr)  in do_mount_setattr()  argument
4428 	if (kattr->mnt_userns) {  in do_mount_setattr()
4431 		mnt_idmap = alloc_mnt_idmap(kattr->mnt_userns);  in do_mount_setattr()
4434 		kattr->mnt_idmap = mnt_idmap;  in do_mount_setattr()
4437 	if (kattr->propagation) {  in do_mount_setattr()
4443 		if (kattr->propagation == MS_SHARED) {  in do_mount_setattr()
4444 			err = invent_group_ids(mnt, kattr->recurse);  in do_mount_setattr()
4473 	err = mount_setattr_prepare(kattr, mnt);  in do_mount_setattr()
4475 		mount_setattr_commit(kattr, mnt);  in do_mount_setattr()
4480 	if (kattr->propagation) {  in do_mount_setattr()
4490 				struct mount_kattr *kattr, unsigned int flags)  in build_mount_idmapped()  argument
4546 	kattr->mnt_userns = get_user_ns(mnt_userns);  in build_mount_idmapped()
4554 			     struct mount_kattr *kattr, unsigned int flags)  in build_mount_kattr()  argument
4565 	*kattr = (struct mount_kattr) {  in build_mount_kattr()
4574 	kattr->propagation = attr->propagation;  in build_mount_kattr()
4579 	kattr->attr_set = attr_flags_to_mnt_flags(attr->attr_set);  in build_mount_kattr()
4580 	kattr->attr_clr = attr_flags_to_mnt_flags(attr->attr_clr);  in build_mount_kattr()
4599 		kattr->attr_clr |= MNT_RELATIME | MNT_NOATIME;  in build_mount_kattr()
4602 			kattr->attr_set |= MNT_RELATIME;  in build_mount_kattr()
4605 			kattr->attr_set |= MNT_NOATIME;  in build_mount_kattr()
4617 	return build_mount_idmapped(attr, usize, kattr, flags);  in build_mount_kattr()
4620 static void finish_mount_kattr(struct mount_kattr *kattr)  in finish_mount_kattr()  argument
4622 	put_user_ns(kattr->mnt_userns);  in finish_mount_kattr()
4623 	kattr->mnt_userns = NULL;  in finish_mount_kattr()
4625 	if (kattr->mnt_idmap)  in finish_mount_kattr()
4626 		mnt_idmap_put(kattr->mnt_idmap);  in finish_mount_kattr()
4636 	struct mount_kattr kattr;  in SYSCALL_DEFINE5()  local
4664 	err = build_mount_kattr(&attr, usize, &kattr, flags);  in SYSCALL_DEFINE5()
4668 	err = user_path_at(dfd, path, kattr.lookup_flags, &target);  in SYSCALL_DEFINE5()
4670 		err = do_mount_setattr(&target, &kattr);  in SYSCALL_DEFINE5()
4673 	finish_mount_kattr(&kattr);  in SYSCALL_DEFINE5()