120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/****************************************************************************
|
|
* fs/driver/fs_findmtddriver.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.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 */
|