2009-10-08 Chris Johns <chrisj@rtems.org>

        * Makefile.am, preinstall.am: Added statvfs.h.
        * libcsupport/Makefile.am: Add statvfs.c.
        * libcsupport/include/sys/statvfs.h, libcsupport/src/statvfs.c:
        New.
        * libcsupport/include/rtems/libio.h: Add a file system handler for
        the statvfs call.
        * libfs/src/devfs/devfs_init.c, libfs/src/dosfs/msdos_init.c,
        libfs/src/imfs/imfs_init.c, libfs/src/nfsclient/src/nfs.c: Set the
        statvfs handler to NULL.
        * include/rtems/fs.h: Add a second node access field for the RFS
        file system to hold a directory offset while the existing field
        holds the inode number. This save a rescan of the directory when
        working with directories.
        * libblock/include/rtems/bdbuf.h: Added references and user fields
        to the buffer descriptor.
        * libblock/src/bdbuf.c: Added dynamic buffer support for different
        block sizes. Fixed a number of bugs.
        * libblock/src/blkdev.c: Release the disk device on an error.
        * libblock/src/diskdevs.c: Set the block size to the media block
        size during initialisation of the disk device.
        * libblock/src/flashdisk.c, libblock/src/nvdisk.c,
        libblock/src/ramdisk.c: Updated the drivers to handle variable
        block sizes.
        * libfs/src/dosfs/fat.c, libfs/src/dosfs/fat.h: Release any
        buffers when an error occurs. The FAT buffer layer hangs onto a
        single buffer while mounted. This should be fixed.
        * sapi/inline/rtems/chain.inl: Added rtems_chain_set_off_chain,
        rtems_chain_is_node_off_chain, and rtems_chain_previous.
        * score/inline/rtems/score/chain.inl: Added _Chain_Set_off_chain,
        and _Chain_Is_node_off_chain.
        * libmisc/shell/main_ln.c, libmisc/shell/main_mknod.c,
        libmisc/shell/mknod-pack_dev.c, libmisc/shell/mknod-pack_dev.h:
        New shell commands.
        * libmisc/Makefile.am, libmisc/shell/shellconfig.h: Added ln and
        mknod commands.
        * libmisc/shell/hexdump-display.c: Fixed the reopen bug which
        showed up as a free with a bad pointer.
        * libmisc/shell/main_mount.c: List the user adding file system
        when listing the available file systems to mount.
        * libmisc/shell/utils-cp.c: Remove the fixed static copy buffer
        and use a large dynamic buffer.
        * score/inline/rtems/score/address.inl, score/src/coremsgsubmit.c,
        score/src/objectallocate.c, score/src/objectfree.c: Remove
        warnings.

1 files changed, 24 insertions, 0 deletions

diff --git a/cpukit/libfs/src/dosfs/fat.c b/cpukit/libfs/src/dosfs/fat.c
index 26682dc6dd..0c30053a72 100644
--- a/cpukit/libfs/src/dosfs/fat.c
+++ b/cpukit/libfs/src/dosfs/fat.c
@@ -264,6 +264,24 @@ _fat_block_write(
     return cmpltd;
 }
 
+/* _fat_block_release --
+ *     This function works around the hack that hold a bdbuf and does
+ *     not release it.
+ *
+ * PARAMETERS:
+ *     mt_entry - mount table entry
+ *
+ * RETURNS:
+ *     0 on success, or -1 if error occured and errno set appropriately
+ */
+int
+_fat_block_release(
+    rtems_filesystem_mount_table_entry_t *mt_entry)
+{
+    fat_fs_info_t *fs_info = mt_entry->fs_info;
+    return fat_buf_release(fs_info);
+}
+    
 /* fat_cluster_read --
  *     wrapper for reading a whole cluster at once
  *
@@ -504,6 +522,7 @@ fat_init_volume_info(rtems_filesystem_mount_table_entry_t *mt_entry)
             if (FAT_GET_FSINFO_LEAD_SIGNATURE(fs_info_sector) != 
                 FAT_FSINFO_LEAD_SIGNATURE_VALUE)
             {
+                _fat_block_release(mt_entry);
                 rtems_disk_release(vol->dd);
                 rtems_set_errno_and_return_minus_one( EINVAL );
             }
@@ -513,6 +532,7 @@ fat_init_volume_info(rtems_filesystem_mount_table_entry_t *mt_entry)
                                       FAT_USEFUL_INFO_SIZE, fs_info_sector);
                 if ( ret < 0 )
                 {
+                    _fat_block_release(mt_entry);
                     rtems_disk_release(vol->dd);
                     return -1;
                 }    
@@ -523,6 +543,7 @@ fat_init_volume_info(rtems_filesystem_mount_table_entry_t *mt_entry)
                                                     0xFFFFFFFF);
                 if ( rc != RC_OK )
                 {
+                    _fat_block_release(mt_entry);
                     rtems_disk_release(vol->dd);
                     return rc;
                 }
@@ -537,6 +558,9 @@ fat_init_volume_info(rtems_filesystem_mount_table_entry_t *mt_entry)
         vol->free_cls = 0xFFFFFFFF;
         vol->next_cl = 0xFFFFFFFF;
     }
+
+    _fat_block_release(mt_entry);
+
     vol->afat_loc = vol->fat_loc + vol->fat_length * vol->afat;
 
     /* set up collection of fat-files fd */