[PATCH] QNX4fs sync

Brings QNX4FS back in sync with 2.4

fs/Config.help

@@ -679,10 +679,12 @@ CONFIG_ROMFS_FS
   answer N.
 
 CONFIG_QNX4FS_FS
-  This is the file system used by the operating system QNX 4. Say Y if
-  you intend to mount QNX hard disks or floppies. Unless you say Y to
-  "QNX4FS read-write support" below, you will only be able to read
-  these file systems.
+  This is the file system used by the real-time operating systems
+  QNX 4 and QNX 6 (the latter is also called QNX RTP).
+  Further information is available at <http://www.qnx.com/>.
+  Say Y if you intend to mount QNX hard disks or floppies.
+  Unless you say Y to "QNX4FS read-write support" below, you will
+  only be able to read these file systems.
 
   This file system support is also available as a module ( = code
   which can be inserted in and removed from the running kernel
@@ -696,6 +698,9 @@ CONFIG_QNX4FS_FS
 CONFIG_QNX4FS_RW
   Say Y if you want to test write support for QNX4 file systems.
 
+  It's currently broken, so for now:
+  answer N.
+
 CONFIG_AUTOFS_FS
   The automounter is a tool to automatically mount remote file systems
   on demand. This implementation is partially kernel-based to reduce

fs/Config.in

@@ -79,7 +79,7 @@ dep_bool '  Debug devfs' CONFIG_DEVFS_DEBUG $CONFIG_DEVFS_FS
 # breaks.
 dep_bool '/dev/pts file system for Unix98 PTYs' CONFIG_DEVPTS_FS $CONFIG_UNIX98_PTYS
 
-dep_tristate 'QNX4 file system support (read only) (EXPERIMENTAL)' CONFIG_QNX4FS_FS $CONFIG_EXPERIMENTAL
+tristate 'QNX4 file system support (read only)' CONFIG_QNX4FS_FS
 dep_mbool '  QNX4FS write support (DANGEROUS)' CONFIG_QNX4FS_RW $CONFIG_QNX4FS_FS $CONFIG_EXPERIMENTAL
 
 tristate 'ROM file system support' CONFIG_ROMFS_FS

fs/qnx4/BUGS

-Last update: 1999-12-23
-
-- Fragmented files and directories were incorrectly handled.
-  Fixed 1999-12-23, Anders.
-
-- readdir sometimes returned the same dir entry more than once.
-  Fixed 1999-12-13, Anders.
-
-- File names with a length of exactly 16 chars were handled incorrectly.
-  Fixed 1999-12-11, Anders.
-
-- Files in a subdir can't be accessed, I think that the inode information
-  is not correctly copied at some point. Solved 06-06-1998, Richard.
-  
-- At some point the mounted device can't be unmounted. I think that somewhere
-  in the code a buffer is not given free.
-
-- Make the '..' entry work, I give it a great chance that the above bug
-  (not given free) has something to do with this one, after a 'ls -l'
-  the mounted device can't be unmounted and that's where the '..' entry
-  is accessed.
-  Seems to be solved 21-06-1998, Frank.
-
-- File read function not correct, after the first block it goes beserk.
-  Solved 21-06-1998, Frank.
-
-- This fs will not work if not built as a module.
-  Solved 25-06-1998, Frank.
-
-- Write/truncate/delete functions don't update the bitmap.

fs/qnx4/TODO

-Name       : QNX4 TODO list
-Last update: 1999-12-23
-
-    - Writing is still unsupported (it may compile, but it certainly won't
-      bring you any joy).
-
-    - qnx4_checkroot (inode.c), currently there's a look for the '/' in
-      the root direntry, if so then the current mounted device is a qnx4
-      partition. This has to be rewritten with a look for 'QNX4' in the
-      bootblock, it seems to me the savest way to ensure that the mounted
-      device is in fact a QNX4 partition.
-      Done 20-06-1998, Frank. But some disks (like QNX install floppies)
-      don't have 'QNX4' in their bootblock.
-      
-    - Bitmap functions. To find out the free space, largest free block, etc.
-      Partly done (RO), Richard, 05/06/1998. Optimized 20-06-1998, Frank.
-    
-    - Complete write, unlink and truncate functions : the bitmap should be
-updated.
-
-    - Porting to linux 2.1.99+ with dcache support. 20-06-1998, Frank.
-    
-    - Don't rewrite the file_read function : use the generic_file_read hook,
-      and write readpage instead. Done on 21-06-1998, Frank.
-
-    - Write dinit and dcheck.
-
-    - Solving the bugs.
-    
-    - Use le32_to_cpu and vice-versa for portability.