Add a test of ROMFS

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@906 42af7a65-404d-4744-a932-0658087f49c3

ChangeLog

@@ -463,4 +463,5 @@
 	  random access to large files.
 
 0.3.15 2008-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
-	* Add support for ROMFS filesystem (initial checkin untested)
+	* Added support for ROMFS filesystem.
+	* Added a simple test the ROMFS filesystem (examples/romfs)

Documentation/NuttX.html

@@ -1097,7 +1097,8 @@ buildroot-0.1.0 2007-03-09 <spudmonkey@racsa.co.cr&gt
 
 <pre><ul>
 nuttx-0.3.15 2008-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
-	* Add support for ROMFS filesystem (initial checkin untested)
+	* Added support for ROMFS filesystem.
+	* Added a simple test the ROMFS filesystem (examples/romfs)
 
 pascal-0.1.3 2008-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 

arch/sim/src/up_initialize.c

@@ -95,7 +95,9 @@ void up_initialize(void)
 
   devnull_register();       /* Standard /dev/null */
   up_devconsole();          /* Our private /dev/console */
+#if defined(CONFIG_FS_FAT) && !defined(CONFIG_DISABLE_MOUNTPOINT)
   up_registerblockdevice(); /* Our FAT ramdisk at /dev/ram0 */
+#endif
 #if defined(CONFIG_NET) && defined(linux)
   uipdriver_init();         /* Our "real" netwok driver */
 #endif

examples/README.txt

@@ -58,6 +58,22 @@ examples/mount
       when CONFIG_EXAMPLES_MOUNT_DEVNAME is not defined.  The
       default is zero (meaning that "/dev/ram0" will be used).
 
+examples/romfs
+^^^^^^^^^^^^^^
+
+  This example exercises the romfs filesystem.  Configuration options
+  include:
+
+  * CONFIG_EXAMPLES_ROMFS_RAMDEVNO
+      The minor device number to use for the ROM disk.  The default is
+      1 (meaning /dev/ram1)
+
+  * CONFIG_EXAMPLES_ROMFS_SECTORSIZE
+      The ROM disk sector size to use.  Default is 64.
+
+  * CONFIG_EXAMPLES_ROMFS_MOUNTPOINT
+      The location to mount the ROM disk.  Deafault: "/usr/local/share"
+
 examples/null
 ^^^^^^^^^^^^^
 

fs/romfs/fs_romfs.c

@@ -654,7 +654,7 @@ static int romfs_readdir(struct inode *mountpt, struct internal_dir_s *dir)
           dir->fd_dir.d_type = DTYPE_DIRECTORY;
           break;
         }
-      else if (IS_DIRECTORY(next))
+      else if (IS_FILE(next))
         {
           dir->fd_dir.d_type = DTYPE_FILE;
           break;
@@ -919,10 +919,6 @@ static int romfs_stat(struct inode *mountpt, const char *relpath, struct stat *b
 {
   struct romfs_mountpt_s *rm;
   struct romfs_dirinfo_s  dirinfo;
-  uint16                date;
-  uint16                date2;
-  uint16                time;
-  ubyte                 attribute;
   int                   ret;
 
   /* Sanity checks */

fs/romfs/fs_romfs.h

@@ -77,7 +77,8 @@
  * values specified in  */
 
 #define RFNEXT_MODEMASK    7    /* Bits 0-2: Mode; bit 3: Executable */
-#define RFNEXT_OFFSETMASK  (~7) /* Bits n-3: Offset to next entry */
+#define RFNEXT_ALLMODEMASK 15   /* Bits 0-3: All mode bits */
+#define RFNEXT_OFFSETMASK (~15) /* Bits n-3: Offset to next entry */
 
 #define RFNEXT_HARDLINK    0    /* rf_info = Link destination file header */
 #define RFNEXT_DIRECTORY   1    /* rf_info = First file's header */

fs/romfs/fs_romfsutil.c

@@ -247,7 +247,7 @@ static inline int romfs_searchdir(struct romfs_mountpt_s *rm,
 
       /* No match... select the offset to the next entry */
 
-      offset += next;
+      offset = next;
     }
    while (next != 0)
 
@@ -543,9 +543,16 @@ int romfs_finddirentry(struct romfs_mountpt_s *rm, struct romfs_dirinfo_s *dirin
   dirinfo->rd_dir.fr_diroffset   = 0;
   dirinfo->rd_dir.fr_firstoffset = rm->rm_rootoffset;
   dirinfo->rd_dir.fr_curroffset  = rm->rm_rootoffset;
-  dirinfo->rd_next               = 0;
+  dirinfo->rd_next               = RFNEXT_DIRECTORY;
   dirinfo->rd_size               = 0;
 
+  /* The root directory is a special case */
+
+  if (!path || path[0] == '\0')
+    {
+      return OK;
+    }
+
   /* Then loop for each directory/file component in the full path */
 
   entryname    = path;
@@ -689,7 +696,7 @@ int romfs_parsedirentry(struct romfs_mountpt_s *rm, uint32 offset, uint32 *poffs
            */
 
           *poffset = offset;
-          *pnext   = (save & RFNEXT_OFFSETMASK) | (next & RFNEXT_MODEMASK);
+          *pnext   = (save & RFNEXT_OFFSETMASK) | (next & RFNEXT_ALLMODEMASK);
           *pinfo   = info;
           *psize   = size;
           return OK;