3967 static unsigned int recalc_flags(struct mount_kattr *kattr, struct mount *mnt)  in recalc_flags()  argument
3972 	flags &= ~kattr->attr_clr;  in recalc_flags()
3974 	flags |= kattr->attr_set;  in recalc_flags()
3979 static int can_idmap_mount(const struct mount_kattr *kattr, struct mount *mnt)  in can_idmap_mount()  argument
3984 	if (!kattr->mnt_userns)  in can_idmap_mount()
3991 	if (kattr->mnt_userns == fs_userns)  in can_idmap_mount()
4026 static inline bool mnt_allow_writers(const struct mount_kattr *kattr,  in mnt_allow_writers()  argument
4029 	return (!(kattr->attr_set & MNT_READONLY) ||  in mnt_allow_writers()
4031 	       !kattr->mnt_userns;  in mnt_allow_writers()
4034 static int mount_setattr_prepare(struct mount_kattr *kattr, struct mount *mnt)  in mount_setattr_prepare()  argument
4040 		if (!can_change_locked_flags(m, recalc_flags(kattr, m))) {  in mount_setattr_prepare()
4045 		err = can_idmap_mount(kattr, m);  in mount_setattr_prepare()
4049 		if (!mnt_allow_writers(kattr, m)) {  in mount_setattr_prepare()
4055 		if (!kattr->recurse)  in mount_setattr_prepare()
4083 static void do_idmap_mount(const struct mount_kattr *kattr, struct mount *mnt)  in do_idmap_mount()  argument
4087 	if (!kattr->mnt_userns)  in do_idmap_mount()
4096 	mnt_userns = get_user_ns(kattr->mnt_userns);  in do_idmap_mount()
4108 static void mount_setattr_commit(struct mount_kattr *kattr, struct mount *mnt)  in mount_setattr_commit()  argument
4115 		do_idmap_mount(kattr, m);  in mount_setattr_commit()
4116 		flags = recalc_flags(kattr, m);  in mount_setattr_commit()
4123 		if (kattr->propagation)  in mount_setattr_commit()
4124 			change_mnt_propagation(m, kattr->propagation);  in mount_setattr_commit()
4125 		if (!kattr->recurse)  in mount_setattr_commit()
4131 static int do_mount_setattr(struct path *path, struct mount_kattr *kattr)  in do_mount_setattr()  argument
4139 	if (kattr->propagation) {  in do_mount_setattr()
4145 		if (kattr->propagation == MS_SHARED) {  in do_mount_setattr()
4146 			err = invent_group_ids(mnt, kattr->recurse);  in do_mount_setattr()
4175 	err = mount_setattr_prepare(kattr, mnt);  in do_mount_setattr()
4177 		mount_setattr_commit(kattr, mnt);  in do_mount_setattr()
4182 	if (kattr->propagation) {  in do_mount_setattr()
4192 				struct mount_kattr *kattr, unsigned int flags)  in build_mount_idmapped()  argument
4248 	kattr->mnt_userns = get_user_ns(mnt_userns);  in build_mount_idmapped()
4256 			     struct mount_kattr *kattr, unsigned int flags)  in build_mount_kattr()  argument
4267 	*kattr = (struct mount_kattr) {  in build_mount_kattr()
4276 	kattr->propagation = attr->propagation;  in build_mount_kattr()
4281 	kattr->attr_set = attr_flags_to_mnt_flags(attr->attr_set);  in build_mount_kattr()
4282 	kattr->attr_clr = attr_flags_to_mnt_flags(attr->attr_clr);  in build_mount_kattr()
4301 		kattr->attr_clr |= MNT_RELATIME | MNT_NOATIME;  in build_mount_kattr()
4304 			kattr->attr_set |= MNT_RELATIME;  in build_mount_kattr()
4307 			kattr->attr_set |= MNT_NOATIME;  in build_mount_kattr()
4319 	return build_mount_idmapped(attr, usize, kattr, flags);  in build_mount_kattr()
4322 static void finish_mount_kattr(struct mount_kattr *kattr)  in finish_mount_kattr()  argument
4324 	put_user_ns(kattr->mnt_userns);  in finish_mount_kattr()
4325 	kattr->mnt_userns = NULL;  in finish_mount_kattr()
4335 	struct mount_kattr kattr;  in SYSCALL_DEFINE5()  local
4363 	err = build_mount_kattr(&attr, usize, &kattr, flags);  in SYSCALL_DEFINE5()
4367 	err = user_path_at(dfd, path, kattr.lookup_flags, &target);  in SYSCALL_DEFINE5()
4369 		err = do_mount_setattr(&target, &kattr);  in SYSCALL_DEFINE5()
4372 	finish_mount_kattr(&kattr);  in SYSCALL_DEFINE5()