f9fb182809
Update files from Gregory Nutt to Apache 2.0 license. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
/****************************************************************************
|
|
* fs/driver/fs_openblockdriver.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 <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;
|
|
}
|