+static int nfs_validate_options(struct nfsmount_info *mi)
+{
+ struct sockaddr *sap = (struct sockaddr *)&mi->address;
+
+ if (!nfs_parse_devname(mi->spec, &mi->hostname, NULL))
+ return 0;
+
+ mi->salen = sizeof(mi->address);
+ if (!nfs_name_to_address(mi->hostname, sap, &mi->salen))
+ return 0;
+
+ if (!nfs_nfs_version(mi->options, &mi->version))
+ return 0;
+ if (strncmp(mi->type, "nfs4", 4) == 0)
+ mi->version = 4;
+ else {
+ char *option = po_get(mi->options, "proto");
+ if (option && strcmp(option, "rdma") == 0)
+ mi->version = 3;
+ }
+ /*
+ * Use the default value set in the config file when
+ * the version has not been explicitly set.
+ */
+ if (mi->version == 0 && config_default_vers) {
+ if (config_default_vers < 4)
+ mi->version = config_default_vers;
+ }
+
+ if (!nfs_append_sloppy_option(mi->options))
+ return 0;
+
+ if (!nfs_append_addr_option(sap, mi->salen, mi->options))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Get NFS/mnt server addresses from mount options
+ *
+ * Returns 1 and fills in @nfs_saddr, @nfs_salen, @mnt_saddr, and @mnt_salen
+ * if all goes well; otherwise zero.
+ */
+static int nfs_extract_server_addresses(struct mount_options *options,
+ struct sockaddr *nfs_saddr,
+ socklen_t *nfs_salen,
+ struct sockaddr *mnt_saddr,
+ socklen_t *mnt_salen)
+{
+ char *option;
+
+ option = po_get(options, "addr");
+ if (option == NULL)
+ return 0;
+ if (!nfs_string_to_sockaddr(option, nfs_saddr, nfs_salen))
+ return 0;
+
+ option = po_get(options, "mountaddr");
+ if (option == NULL) {
+ memcpy(mnt_saddr, nfs_saddr, *nfs_salen);
+ *mnt_salen = *nfs_salen;
+ } else if (!nfs_string_to_sockaddr(option, mnt_saddr, mnt_salen))
+ return 0;
+
+ return 1;
+}
+
+static int nfs_construct_new_options(struct mount_options *options,
+ struct pmap *nfs_pmap,
+ struct pmap *mnt_pmap)