}
#endif /* MOUNT_CONFIG */
-static int nfs_lookup(const char *hostname, const sa_family_t family,
- struct sockaddr *sap, socklen_t *salen)
+/**
+ * nfs_lookup - resolve hostname to an IPv4 or IPv6 socket address
+ * @hostname: pointer to C string containing DNS hostname to resolve
+ * @family: address family hint
+ * @sap: pointer to buffer to fill with socket address
+ * @len: IN: size of buffer to fill; OUT: size of socket address
+ *
+ * Returns 1 and places a socket address at @sap if successful;
+ * otherwise zero.
+ */
+int nfs_lookup(const char *hostname, const sa_family_t family,
+ struct sockaddr *sap, socklen_t *salen)
{
struct addrinfo *gai_results;
struct addrinfo gai_hint = {
return ret;
}
-/**
- * nfs_name_to_address - resolve hostname to an IPv4 or IPv6 socket address
- * @hostname: pointer to C string containing DNS hostname to resolve
- * @sap: pointer to buffer to fill with socket address
- * @len: IN: size of buffer to fill; OUT: size of socket address
- *
- * Returns 1 and places a socket address at @sap if successful;
- * otherwise zero.
- */
-int nfs_name_to_address(const char *hostname,
- struct sockaddr *sap, socklen_t *salen)
-{
-#ifdef IPV6_SUPPORTED
- return nfs_lookup(hostname, AF_UNSPEC, sap, salen);
-#else /* !IPV6_SUPPORTED */
- return nfs_lookup(hostname, AF_INET, sap, salen);
-#endif /* !IPV6_SUPPORTED */
-}
-
/**
* nfs_gethostbyname - resolve a hostname to an IPv4 address
* @hostname: pointer to a C string containing a DNS hostname
* OUT: length of converted socket address
*
* Convert a presentation format address string to a socket address.
- * Similar to nfs_name_to_address(), but the DNS query is squelched,
- * and won't make any noise if the getaddrinfo() call fails.
+ * Similar to nfs_lookup(), but the DNS query is squelched, and it
+ * won't make any noise if the getaddrinfo() call fails.
*
* Returns 1 and fills in @sap and @salen if successful; otherwise zero.
*
return 1;
}
+/*
+ * Returns TRUE and fills in @family if a valid NFS protocol option
+ * is found, or FALSE if the option was specified with an invalid value.
+ */
+int nfs_nfs_proto_family(struct mount_options *options,
+ sa_family_t *family)
+{
+ unsigned long protocol;
+ char *option;
+
+#ifdef IPV6_SUPPORTED
+ *family = AF_UNSPEC;
+#else
+ *family = AF_INET;
+#endif
+
+ switch (po_rightmost(options, nfs_transport_opttbl)) {
+ case 0: /* udp */
+ return 1;
+ case 1: /* tcp */
+ return 1;
+ case 2: /* proto */
+ option = po_get(options, "proto");
+ if (option != NULL)
+ return nfs_get_proto(option, family, &protocol);
+ }
+
+ /*
+ * NFS transport protocol wasn't specified. Return the
+ * default address family.
+ */
+ return 1;
+}
+
/*
* "mountprog" is supported only by the legacy mount command. The
* kernel mount client does not support this option.
return 1;
}
+/*
+ * Returns TRUE and fills in @family if a valid MNT protocol option
+ * is found, or FALSE if the option was specified with an invalid value.
+ */
+int nfs_mount_proto_family(struct mount_options *options,
+ sa_family_t *family)
+{
+ unsigned long protocol;
+ char *option;
+
+#ifdef HAVE_LIBTIRPC
+ *family = AF_UNSPEC;
+#else
+ *family = AF_INET;
+#endif
+
+ option = po_get(options, "mountproto");
+ if (option != NULL)
+ return nfs_get_proto(option, family, &protocol);
+
+ /*
+ * MNT transport protocol wasn't specified. If the NFS
+ * transport protocol was specified, derive the family
+ * from that; otherwise, return the default family for
+ * NFS.
+ */
+ return nfs_nfs_proto_family(options, family);
+}
+
/**
* nfs_options2pmap - set up pmap structs based on mount options
* @options: pointer to mount options