[nvo] Allow resizing of non-volatile stored option blocks

Signed-off-by: Michael Brown <mcb30@ipxe.org>

2 files changed, 12 insertions, 1 deletions

diff --git a/src/include/ipxe/dhcpopts.h b/src/include/ipxe/dhcpopts.h
index fe07d903d..8fb3d2d79 100644
--- a/src/include/ipxe/dhcpopts.h
+++ b/src/include/ipxe/dhcpopts.h
@@ -36,6 +36,7 @@ extern void dhcpopt_init ( struct dhcp_options *options,
 			   void *data, size_t alloc_len,
 			   int ( * realloc ) ( struct dhcp_options *options,
 					       size_t len ) );
+extern void dhcpopt_update_used_len ( struct dhcp_options *options );
 extern int dhcpopt_no_realloc ( struct dhcp_options *options, size_t len );
 
 #endif /* _IPXE_DHCPOPTS_H */
diff --git a/src/include/ipxe/nvo.h b/src/include/ipxe/nvo.h
index 1fdc12ccb..995afd749 100644
--- a/src/include/ipxe/nvo.h
+++ b/src/include/ipxe/nvo.h
@@ -30,12 +30,22 @@ struct nvo_block {
 	size_t len;
 	/** Option-containing data */
 	void *data;
+	/**
+	 * Resize non-volatile stored option block
+	 *
+	 * @v nvo		Non-volatile options block
+	 * @v len		New size
+	 * @ret rc		Return status code
+	 */
+	int ( * resize ) ( struct nvo_block *nvo, size_t len );
 	/** DHCP options block */
 	struct dhcp_options dhcpopts;
 };
 
 extern void nvo_init ( struct nvo_block *nvo, struct nvs_device *nvs,
-		       size_t address, size_t len, struct refcnt *refcnt );
+		       size_t address, size_t len,
+		       int ( * resize ) ( struct nvo_block *nvo, size_t len ),
+		       struct refcnt *refcnt );
 extern int register_nvo ( struct nvo_block *nvo, struct settings *parent );
 extern void unregister_nvo ( struct nvo_block *nvo );