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.

4 files changed, 113 insertions, 1 deletions

diff --git a/cpukit/libcsupport/Makefile.am b/cpukit/libcsupport/Makefile.am
index 40c46f0847..ef66d121ae 100644
--- a/cpukit/libcsupport/Makefile.am
+++ b/cpukit/libcsupport/Makefile.am
@@ -62,7 +62,7 @@ SYSTEM_CALL_C_FILES = src/open.c src/close.c src/read.c src/write.c \
     src/link.c src/unlink.c src/umask.c src/ftruncate.c src/utime.c src/fstat.c \
     src/fcntl.c src/fpathconf.c src/getdents.c src/fsync.c src/fdatasync.c \
     src/pipe.c src/dup.c src/dup2.c src/symlink.c src/readlink.c src/creat.c \
-    src/chroot.c src/sync.c src/_rename_r.c
+    src/chroot.c src/sync.c src/_rename_r.c src/statvfs.c
 
 ## Until sys/uio.h is moved to libcsupport, we have to have networking
 ## enabled to compile these.  Hopefully this is a temporary situation.
diff --git a/cpukit/libcsupport/include/rtems/libio.h b/cpukit/libcsupport/include/rtems/libio.h
index 44e8b59267..e89427fa2e 100644
--- a/cpukit/libcsupport/include/rtems/libio.h
+++ b/cpukit/libcsupport/include/rtems/libio.h
@@ -28,6 +28,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
+#include <sys/statvfs.h>
 
 /*
  *  Define data types which must be constructed using forward references.
@@ -250,6 +251,11 @@ typedef int (*rtems_filesystem_readlink_t)(
  size_t                            bufsize
 );
 
+typedef int (*rtems_filesystem_statvfs_t)(
+ rtems_filesystem_location_info_t  *loc,     /* IN  */
+ struct statvfs                    *buf      /* OUT */
+);
+
 /*
  * operations table that must be defined for every file system.
  */
@@ -274,6 +280,7 @@ struct _rtems_filesystem_operations_table {
     rtems_filesystem_evaluate_link_t eval_link_h;
     rtems_filesystem_symlink_t       symlink_h;
     rtems_filesystem_readlink_t      readlink_h;
+    rtems_filesystem_statvfs_t       statvfs_h;
 };
 
 #if 0
diff --git a/cpukit/libcsupport/include/sys/statvfs.h b/cpukit/libcsupport/include/sys/statvfs.h
new file mode 100644
index 0000000000..1ef210a702
--- /dev/null
+++ b/cpukit/libcsupport/include/sys/statvfs.h
@@ -0,0 +1,45 @@
+/*
+ *  COPYRIGHT (c) 2009 Chris Johns <chrisj@rtems.org>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+/*
+ * The statvfs as defined by the SUS:
+ *    http://www.opengroup.org/onlinepubs/009695399/basedefs/sys/statvfs.h.html
+ */
+
+#ifndef _SYS_STATVFS_H_
+#define _SYS_STATVFS_H_
+
+#include <sys/cdefs.h>
+#include <stdint.h>
+
+typedef uint64_t fsblkcnt_t;
+typedef uint32_t fsfilcnt_t;
+
+struct statvfs
+{
+  unsigned long f_bsize;   /**< File system block size. */
+  unsigned long f_frsize;  /**< Fundamental file system block size. */
+  fsblkcnt_t    f_blocks;  /**< Total number of blocks on file system in units
+                            * of f_frsize. */
+  fsblkcnt_t    f_bfree;   /**< Total number of free blocks. */
+  fsblkcnt_t    f_bavail;  /**< Number of free blocks available to
+                            * non-privileged process. */
+  fsfilcnt_t    f_files;   /**< Total number of file serial numbers. */
+  fsfilcnt_t    f_ffree;   /**< Total number of free file serial numbers. */
+  fsfilcnt_t    f_favail;  /**< Number of file serial numbers available to
+                            * non-privileged process. */
+  unsigned long f_fsid;    /**< File system ID. */
+  unsigned long f_flag;    /**< Bit mask of f_flag values. */
+  unsigned long f_namemax; /**< Maximum filename length. */
+};
+
+int statvfs(const char *, struct statvfs *);
+int fstatvfs(int, struct statvfs *);
+
+#endif
diff --git a/cpukit/libcsupport/src/statvfs.c b/cpukit/libcsupport/src/statvfs.c
new file mode 100644
index 0000000000..bd6827fe76
--- /dev/null
+++ b/cpukit/libcsupport/src/statvfs.c
@@ -0,0 +1,60 @@
+/*
+ *  COPYRIGHT (c) 2009 Chris Johns <chrisj@rtems.org>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+/*
+ * The statvfs as defined by the SUS:
+ *    http://www.opengroup.org/onlinepubs/009695399/basedefs/sys/statvfs.h.html
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/libio_.h>
+#include <rtems/seterr.h>
+
+#include <sys/statvfs.h>
+
+/*
+ *  Data structures and routines private to mount/unmount pair.
+ */
+extern rtems_chain_control rtems_filesystem_mount_table_control;
+
+int
+statvfs (const char *path, struct statvfs *sb)
+{
+  rtems_filesystem_location_info_t      loc;
+  rtems_filesystem_location_info_t     *fs_mount_root;
+  rtems_filesystem_mount_table_entry_t *mt_entry;
+  int                                   result;
+
+  /*
+   *  Get
+   *    The root node of the mounted filesytem.
+   *    The node for the directory that the fileystem is mounted on.
+   *    The mount entry that is being refered to.
+   */
+
+  if ( rtems_filesystem_evaluate_path( path, strlen( path ), 0x0, &loc, true ) )
+    return -1;
+
+  mt_entry      = loc.mt_entry;
+  fs_mount_root = &mt_entry->mt_fs_root;
+
+  if ( !fs_mount_root->ops->statvfs_h )
+    rtems_set_errno_and_return_minus_one( ENOTSUP );
+
+  memset (sb, 0, sizeof (struct statvfs));
+  
+  result = ( fs_mount_root->ops->statvfs_h )( fs_mount_root, sb );
+  
+  rtems_filesystem_freenode( &loc );
+
+  return result;
+}