5824 static int prepare_kstatmount(struct kstatmount *ks, struct mnt_id_req *kreq,  in prepare_kstatmount()  argument
5832 	ks->mask = kreq->param;  in prepare_kstatmount()
5851 			   struct mnt_id_req *kreq, unsigned int flags)  in copy_mnt_id_req()  argument
5865 	memset(kreq, 0, sizeof(*kreq));  in copy_mnt_id_req()
5866 	ret = copy_struct_from_user(kreq, sizeof(*kreq), req, usize);  in copy_mnt_id_req()
5871 		if (kreq->mnt_id || kreq->mnt_ns_id)  in copy_mnt_id_req()
5874 		if (kreq->mnt_ns_fd != 0 && kreq->mnt_ns_id)  in copy_mnt_id_req()
5877 		if (kreq->mnt_id <= MNT_UNIQUE_ID_OFFSET)  in copy_mnt_id_req()
5888 static struct mnt_namespace *grab_requested_mnt_ns(const struct mnt_id_req *kreq)  in grab_requested_mnt_ns()  argument
5892 	if (kreq->mnt_ns_id) {  in grab_requested_mnt_ns()
5893 		mnt_ns = lookup_mnt_ns(kreq->mnt_ns_id);  in grab_requested_mnt_ns()
5896 	} else if (kreq->mnt_ns_fd) {  in grab_requested_mnt_ns()
5899 		CLASS(fd, f)(kreq->mnt_ns_fd);  in grab_requested_mnt_ns()
5927 	struct mnt_id_req kreq;  in SYSCALL_DEFINE4()  local
5935 	ret = copy_mnt_id_req(req, &kreq, flags);  in SYSCALL_DEFINE4()
5940 		mnt_file = fget_raw(kreq.mnt_fd);  in SYSCALL_DEFINE4()
5945 		ns = grab_requested_mnt_ns(&kreq);  in SYSCALL_DEFINE4()
5949 		if (kreq.mnt_ns_id && (ns != current->nsproxy->mnt_ns) &&  in SYSCALL_DEFINE4()
5959 	ret = prepare_kstatmount(ks, &kreq, buf, bufsize, seq_size);  in SYSCALL_DEFINE4()
5964 		ret = do_statmount(ks, kreq.mnt_id, kreq.mnt_ns_id, mnt_file, ns);  in SYSCALL_DEFINE4()
6055 static inline int prepare_klistmount(struct klistmount *kls, struct mnt_id_req *kreq,  in prepare_klistmount()  argument
6058 	u64 last_mnt_id = kreq->param;  in prepare_klistmount()
6073 	ns = grab_requested_mnt_ns(kreq);  in prepare_klistmount()
6078 	kls->mnt_parent_id = kreq->mnt_id;  in prepare_klistmount()
6087 	struct mnt_id_req kreq;  in SYSCALL_DEFINE4()  local
6104 	ret = copy_mnt_id_req(req, &kreq, 0);  in SYSCALL_DEFINE4()
6108 	ret = prepare_klistmount(&kls, &kreq, nr_mnt_ids);  in SYSCALL_DEFINE4()
6112 	if (kreq.mnt_ns_id && (kls.ns != current->nsproxy->mnt_ns) &&  in SYSCALL_DEFINE4()