[sanboot] Add "sanhook" and "sanunhook" commands

Expose the multiple-SAN-drive capability of the iPXE core via the iPXE
command line by adding commands to hook and unhook additional drives.

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

3 files changed, 27 insertions, 3 deletions

diff --git a/src/include/ipxe/null_sanboot.h b/src/include/ipxe/null_sanboot.h
index 341a9a1d2..2b3a2c74d 100644
--- a/src/include/ipxe/null_sanboot.h
+++ b/src/include/ipxe/null_sanboot.h
@@ -15,4 +15,9 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #define SANBOOT_PREFIX_null __null_
 #endif
 
+static inline __always_inline unsigned int
+SANBOOT_INLINE ( null, san_default_drive ) ( void ) {
+	return 0;
+}
+
 #endif /* _IPXE_NULL_SANBOOT_H */
diff --git a/src/include/ipxe/sanboot.h b/src/include/ipxe/sanboot.h
index 913282eb5..14c8a5da4 100644
--- a/src/include/ipxe/sanboot.h
+++ b/src/include/ipxe/sanboot.h
@@ -59,11 +59,18 @@ struct uri;
 #include <bits/sanboot.h>
 
 /**
+ * Get default SAN drive number
+ *
+ * @ret drive		Default drive number
+ */
+unsigned int san_default_drive ( void );
+
+/**
  * Hook SAN device
  *
  * @v uri		URI
- * @v drive		Requested drive number
- * @ret drive		Assigned drive number, or negative error
+ * @v drive		Drive number
+ * @ret rc		Return status code
  */
 int san_hook ( struct uri *uri, unsigned int drive );
 
diff --git a/src/include/usr/autoboot.h b/src/include/usr/autoboot.h
index a608b3dce..25b9f073d 100644
--- a/src/include/usr/autoboot.h
+++ b/src/include/usr/autoboot.h
@@ -14,7 +14,19 @@ struct net_device;
 struct uri;
 struct settings;
 
-extern int uriboot ( struct uri *filename, struct uri *root_path );
+/** uriboot() flags */
+enum uriboot_flags {
+	URIBOOT_NO_SAN_DESCRIBE = 0x0001,
+	URIBOOT_NO_SAN_BOOT = 0x0002,
+	URIBOOT_NO_SAN_UNHOOK = 0x0004,
+};
+
+#define URIBOOT_NO_SAN ( URIBOOT_NO_SAN_DESCRIBE | \
+			 URIBOOT_NO_SAN_BOOT |	   \
+			 URIBOOT_NO_SAN_UNHOOK )
+
+extern int uriboot ( struct uri *filename, struct uri *root_path, int drive,
+		     unsigned int flags );
 extern struct uri *
 fetch_next_server_and_filename ( struct settings *settings );
 extern int netboot ( struct net_device *netdev );