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- /****************************************************************************
- * fs/driver/fs_findmtddriver.c
- *
- * Copyright (C) 2018 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 <sys/types.h>
- #include <sys/mount.h>
- #include <stdbool.h>
- #include <assert.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/fs/fs.h>
- #include "inode/inode.h"
- #include "driver/driver.h"
- #ifdef CONFIG_MTD
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: find_mtddriver
- *
- * Description:
- * Return the inode of the named MTD driver specified by 'pathname'
- *
- * Input Parameters:
- * pathname - the full path to the named MTD driver to be located
- * ppinode - address of the location to return the inode reference
- *
- * Returned Value:
- * Returns zero on success or a negated errno on failure:
- *
- * ENOENT - No MTD driver of this name is registered
- * ENOTBLK - The inode associated with the pathname is not an MTD driver
- *
- ****************************************************************************/
- int find_mtddriver(FAR const char *pathname, FAR struct inode **ppinode)
- {
- struct inode_search_s desc;
- FAR struct inode *inode;
- int ret = 0; /* Assume success */
- DEBUGASSERT(pathname != NULL || ppinode != NULL);
- /* Find the inode registered with this pathname */
- SETUP_SEARCH(&desc, pathname, false);
- ret = inode_find(&desc);
- if (ret < 0)
- {
- ferr("ERROR: Failed to find %s\n", pathname);
- ret = -ENOENT;
- goto errout_with_search;
- }
- /* Get the search results */
- inode = desc.node;
- DEBUGASSERT(inode != NULL);
- /* Verify that the inode is a block driver. */
- if (!INODE_IS_MTD(inode))
- {
- ferr("ERROR: %s is not a named MTD driver\n", pathname);
- ret = -ENOTBLK;
- goto errout_with_inode;
- }
- /* Return the MTD inode reference */
- DEBUGASSERT(inode->u.i_mtd != NULL);
- *ppinode = inode;
- RELEASE_SEARCH(&desc);
- return OK;
- errout_with_inode:
- inode_release(inode);
- errout_with_search:
- RELEASE_SEARCH(&desc);
- return ret;
- }
- #else
- int find_mtddriver(FAR const char *pathname, FAR struct inode **ppinode)
- {
- return -ENODEV;
- }
- #endif /* CONFIG_MTD */
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