Allow mounting of any directory as the root directory.

Provide definitions for the macros:
* RB_ROOT_VOL_HIDDEN(v) to exclude certain items from the root.
* RB_ROOT_CONTENTS to return a string with the name of the
directory to mount in the root.

Defaults are in export/rbpaths.h

It's a bit much for those that don't need the full functionality.
Some conditional define can cut it back a lot to cut out things only
needed if alternate root mounts are required. I'm just not bothering
yet. The basic concept would be applied to all targets to keep file
code from forking too much.

Change-Id: I90b5c0a1c949283d3102c16734b0b6ac73901a30

1 files changed, 4 insertions, 0 deletions

diff --git a/firmware/export/mv.h b/firmware/export/mv.h
index ec7b2efdbd..5aa0ff8b4d 100644
--- a/firmware/export/mv.h
+++ b/firmware/export/mv.h
@@ -84,6 +84,10 @@
 #define VOL_MAX_LEN      (1 + VOL_DEC_MAX_LEN + 2 + 1)
 #define VOL_NUM_MAX      100
 
+#ifndef ROOT_VOLUME
+#define ROOT_VOLUME      INT_MAX
+#endif
+
 #else /* empty definitions if no multi-volume */
 #define IF_MV(x...)
 #define IF_MV_NONVOID(x...) void