1 files changed, 124 insertions, 0 deletions
diff --git a/nuttx/fs/fs_registerblockdriver.c b/nuttx/fs/fs_registerblockdriver.c
new file mode 100644
index 000000000..bb5a3121b
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+++ b/nuttx/fs/fs_registerblockdriver.c
@@ -0,0 +1,124 @@
+/****************************************************************************
+ * fs/fs_registerblockdriver.c
+ *
+ *   Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <errno.h>
+
+#include <nuttx/fs/fs.h>
+
+#include "fs_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: register_blockdriver
+ *
+ * Description:
+ *   Register a block driver inode the pseudo file system.
+ *
+ * Input parameters:
+ *   path - The path to the inode to create
+ *   bops - The block driver operations structure
+ *   mode - inmode priviledges (not used)
+ *   priv - Private, user data that will be associated with the inode.
+ *
+ * Returned Value:
+ *   Zero on success (with the inode point in 'inode'); A negated errno
+ *   value is returned on a failure (all error values returned by
+ *   inode_reserve):
+ *
+ *   EINVAL - 'path' is invalid for this operation
+ *   EEXIST - An inode already exists at 'path'
+ *   ENOMEM - Failed to allocate in-memory resources for the operation
+ *
+ ****************************************************************************/
+
+int register_blockdriver(FAR const char *path,
+                         FAR const struct block_operations *bops,
+                         mode_t mode, FAR void *priv)
+{
+  FAR struct inode *node;
+  int ret;
+
+  /* Insert an inode for the device driver -- we need to hold the inode
+   * semaphore to prevent access to the tree while we this.  This is because
+   * we will have a momentarily bad true until we populate the inode with
+   * valid data.
+   */
+
+  inode_semtake();
+  ret = inode_reserve(path, &node);
+  if (ret >= 0)
+    {
+      /* We have it, now populate it with block driver specific information. */
+
+      INODE_SET_BLOCK(node);
+
+      node->u.i_bops  = bops;
+#ifdef CONFIG_FILE_MODE
+      node->i_mode    = mode;
+#endif
+      node->i_private = priv;
+      ret             = OK;
+    }
+
+  inode_semgive();
+  return ret;
+}
+