hosted: Fix USB mounting code to work with HAVE_MULTIDRIVE enabled

Change-Id: I48944c28903db117d3d883a5e777cafe5d055600

firmware/target/hosted/fiio/usb-fiio.c

@@ -28,6 +28,11 @@
 #include "power.h"
 #include "power-fiio.h"
 
+#ifdef HAVE_MULTIDRIVE
+void cleanup_rbhome(void);
+void startup_rbhome(void);
+#endif
+
 const char * const sysfs_usb_online =
     "/sys/class/power_supply/usb/online";
 
@@ -68,6 +73,9 @@ void usb_enable(bool on)
 */
 int disk_mount_all(void)
 {
+#ifdef HAVE_MULTIDRIVE
+    startup_rbhome();
+#endif
     return 1;
 }
 
@@ -77,6 +85,10 @@ int disk_mount_all(void)
  */
 int disk_unmount_all(void)
 {
+#ifdef HAVE_MULTIDRIVE
+    cleanup_rbhome();
+#endif
+
     return 1;
 }
 

firmware/target/hosted/filesystem-app.c

@@ -100,11 +100,20 @@ static const char *handle_special_links(const char* link, unsigned flags,
 
 /* we keep an open descriptor of the home directory to detect when it has been
    opened by opendir() so that its "symlinks" may be enumerated */
-static void cleanup_rbhome(void)
+void cleanup_rbhome(void)
 {
     os_close(rbhome_fildes);
     rbhome_fildes = -1;
 }
+void startup_rbhome(void)
+{
+    /* if this fails then alternate volumes will not work, but this function
+       cannot return that fact */
+    rbhome_fildes = os_opendirfd(rbhome);
+    if (rbhome_fildes >= 0)
+        atexit(cleanup_rbhome);
+}
+
 #endif /* HAVE_MULTIDRIVE */
 
 void paths_init(void)
@@ -140,14 +149,9 @@ void paths_init(void)
     os_mkdir(config_dir __MKDIR_MODE_ARG);
 #endif
 #endif /* HAVE_SPECIAL_DIRS */
-
 #ifdef HAVE_MULTIDRIVE
-    /* if this fails then alternate volumes will not work, but this function
-       cannot return that fact */
-    rbhome_fildes = os_opendirfd(rbhome);
-    if (rbhome_fildes >= 0)
-        atexit(cleanup_rbhome);
-#endif /* HAVE_MULTIDRIVE */
+    startup_rbhome();
+#endif
 }
 
 #ifdef HAVE_SPECIAL_DIRS

firmware/target/hosted/usb-hiby.c

@@ -27,8 +27,16 @@
 #include "sysfs.h"
 #include "power.h"
 
+//#define LOGF_ENABLE
+#include "logf.h"
+
 static bool adb_mode = false;
 
+#ifdef HAVE_MULTIDRIVE
+void cleanup_rbhome(void);
+void startup_rbhome(void);
+#endif
+
 /* TODO: implement usb detection properly */
 int usb_detect(void)
 {
@@ -37,6 +45,8 @@ int usb_detect(void)
 
 void usb_enable(bool on)
 {
+    logf("usb enable %d %d\n", on, adb_mode);
+
     /* Ignore usb enable/disable when ADB is enabled so we can fireup adb shell
      * without entering ums mode
      */
@@ -65,11 +75,16 @@ int disk_mount_all(void)
             int rval = mount(dev[i], PIVOT_ROOT, fs[j], 0, NULL);
             if (rval == 0 || errno == -EBUSY)
             {
+                logf("mount good! %d/%d %d %d", i, j, rval, errno);
+#ifdef HAVE_MULTIDRIVE
+                startup_rbhome();
+#endif
                 return 1;
             }
          }
     }
 
+    logf("mount failed! %d", errno);
     return 0;
 }
 
@@ -79,12 +94,22 @@ int disk_mount_all(void)
  */
 int disk_unmount_all(void)
 {
-    if (umount("/mnt/sd_0") == 0)
+#ifdef HAVE_MULTIDRIVE
+    cleanup_rbhome();
+#endif
+
+    if (umount(PIVOT_ROOT) == 0)
     {
         sysfs_set_string("/sys/class/android_usb/android0/f_mass_storage/lun/file", "/dev/mmcblk0");
+        logf("umount_all good");
         return 1;
     }
 
+    logf("umount_all failed! %d", errno);
+#ifdef HAVE_MULTIDRIVE
+    startup_rbhome();
+#endif
+
     return 0;
 }