Add mount and umount

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@214 42af7a65-404d-4744-a932-0658087f49c3

include/nuttx/fs.h

@@ -59,12 +59,22 @@
 struct file;
 struct file_operations
 {
+  /* The device driver open method differs from the mountpoint open method */
+
   int     (*open)(FAR struct file *filp);
+
+  /* The following methods must be identical in signature and position because
+   * the struct file_operations and struct mountp_operations are treated like
+   * unions.
+   */
+
   int     (*close)(FAR struct file *filp);
   ssize_t (*read)(FAR struct file *filp, char *buffer, size_t buflen);
   ssize_t (*write)(FAR struct file *filp, const char *buffer, size_t buflen);
   off_t   (*seek)(FAR struct file *filp, off_t offset, int whence);
   int     (*ioctl)(FAR struct file *filp, int cmd, unsigned long arg);
+
+  /* The two structures need not be common after this point */
 };
 
 /* This structure provides information about the state of a block driver */
@@ -98,14 +108,33 @@ struct block_operations
  * struct file_operations or struct mountpt_operations
  */
 
+struct inode;
 struct mountpt_operations
 {
+  /* The mountpoint open method differs from the driver open method
+   * because it receives the relative path into the mountpoint.
+   */
+
   int     (*open)(FAR struct file *filp, const char *rel_path);
+
+  /* The following methods must be identical in signature and position because
+   * the struct file_operations and struct mountp_operations are treated like
+   * unions.
+   */
+
   int     (*close)(FAR struct file *filp);
   ssize_t (*read)(FAR struct file *filp, char *buffer, size_t buflen);
   ssize_t (*write)(FAR struct file *filp, const char *buffer, size_t buflen);
   off_t   (*seek)(FAR struct file *filp, off_t offset, int whence);
   int     (*ioctl)(FAR struct file *filp, int cmd, unsigned long arg);
+
+  /* The two structures need not be common after this point.  For the
+   * case of struct mountpt_operations, additional operations are included
+   * that used only for mounting and unmounting the volume.
+   */
+
+  int   (*bind)(FAR struct inode *blkdriver, const void *data, void **handle);
+  int   (*unbind)(void *handle);
 };
 
 /* This structure represents one inode in the Nuttx psuedo-file system */
@@ -125,7 +154,7 @@ struct inode
 #ifdef CONFIG_FILE_MODE
   mode_t                       i_mode;       /* Access mode flags */
 #endif
-  FAR void                    *i_private;    /* Driver private data */
+  FAR void                    *i_private;    /* Per inode driver private data */
   char                         i_name[1];    /* Name of inode (variable) */
 };
 #define FSNODE_SIZE(n) (sizeof(struct inode) + (n))
@@ -220,11 +249,13 @@ EXTERN STATUS register_blockdriver(const char *path,
                                    const struct block_operations *bops,
                                    mode_t mode, void *private);
 
-/* fs_inoderemove.c *********************************************************/
+/* fs_unregisterdriver.c ****************************************************/
 
-EXTERN STATUS inode_remove(const char *path);
+EXTERN STATUS unregister_driver(const char *path);
-#define unregister_driver(p) inode_remove(p)
+
-#define unregister_blockdriver(p) inode_remove(p)
+/* fs_unregisterblockdriver.c ***********************************************/
+
+EXTERN STATUS unregister_blockdriver(const char *path);
 
 /* fs_open.c ****************************************************************/
 

include/sys/mount.h

@@ -0,0 +1,78 @@
+/****************************************************************************
+ * sys/mount.h
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 Gregory Nutt 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.
+ *
+ ****************************************************************************/
+
+#ifndef __SYS_MOUNT_H
+#define __SYS_MOUNT_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* Mount flags */
+
+#define MS_RDONLY 1 /* Mount file system read-only */
+
+/****************************************************************************
+ * Public Type Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+EXTERN int mount(const char *source, const char *target,
+                 const char *filesystemtype, unsigned long mountflags,
+                 const void *data);
+EXTERN int umount(const char *target);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __SYS_MOUNT_H */