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- /****************************************************************************
- * fs/driver/fs_openblockdriver.c
- *
- * Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in pathname and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of pathname 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 <debug.h>
- #include <errno.h>
- #include <nuttx/fs/fs.h>
- #include "inode/inode.h"
- #include "driver/driver.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: open_blockdriver
- *
- * Description:
- * Return the inode of the block driver specified by 'pathname'
- *
- * Input Parameters:
- * pathname - the full path to the block driver to be opened
- * mountflags - if MS_RDONLY is not set, then driver must support write
- * operations (see include/sys/mount.h)
- * ppinode - address of the location to return the inode reference
- *
- * Returned Value:
- * Returns zero on success or a negated errno on failure:
- *
- * EINVAL - pathname or pinode is NULL
- * ENOENT - No block driver of this name is registered
- * ENOTBLK - The inode associated with the pathname is not a block driver
- * EACCESS - The MS_RDONLY option was not set but this driver does not
- * support write access
- *
- ****************************************************************************/
- int open_blockdriver(FAR const char *pathname, int mountflags,
- FAR struct inode **ppinode)
- {
- FAR struct inode *inode;
- int ret;
- /* Minimal sanity checks */
- #ifdef CONFIG_DEBUG_FEATURES
- if (!ppinode)
- {
- return -EINVAL;
- }
- #endif
- /* Find the inode associated with this block driver name. find_blockdriver
- * will perform all additional error checking.
- */
- ret = find_blockdriver(pathname, mountflags, &inode);
- if (ret < 0)
- {
- #ifdef CONFIG_MTD
- /* Not block device, mtd device? let's try it. */
- return mtd_proxy(pathname, mountflags, ppinode);
- #else
- ferr("ERROR: Failed to file %s block driver\n", pathname);
- return ret;
- #endif
- }
- /* Open the block driver. Note that no mutually exclusive access
- * to the driver is enforced here. That must be done in the driver
- * if needed.
- */
- if (inode->u.i_bops->open)
- {
- ret = inode->u.i_bops->open(inode);
- if (ret < 0)
- {
- ferr("ERROR: %s driver open failed\n", pathname);
- inode_release(inode);
- return ret;
- }
- }
- *ppinode = inode;
- return OK;
- }
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