155 lines
5.0 KiB
C
155 lines
5.0 KiB
C
/****************************************************************************
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* fs_inoderemove.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <nuttx/fs.h>
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#include "fs_internal.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: inode_unlink
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****************************************************************************/
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static void inode_unlink(struct inode *node,
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struct inode *peer,
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struct inode *parent)
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{
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/* If peer is non-null, then remove the node from the right of
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* of that peer node.
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*/
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if (peer)
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{
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peer->i_peer = node->i_peer;
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}
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/* If parent is non-null, then remove the node from head of
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* of the list of children.
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*/
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else if (parent)
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{
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parent->i_child = node->i_peer;
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}
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/* Otherwise, we must be removing the root inode. */
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else
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{
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root_inode = node->i_peer;
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}
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node->i_peer = NULL;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: inode_remove
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*
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* NOTE: Caller must hold the inode semaphore
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****************************************************************************/
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STATUS inode_remove(const char *path)
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{
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const char *name = path;
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FAR struct inode *node;
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FAR struct inode *left;
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FAR struct inode *parent;
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if (!*path || path[0] != '/')
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{
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return -EINVAL;
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}
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/* Find the node to delete */
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node = inode_search(&name, &left, &parent, NULL);
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if (node)
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{
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/* Found it, now remove it from the tree */
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inode_unlink(node, left, parent);
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/* We cannot delete it if there reference to the inode */
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if (node->i_crefs)
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{
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/* In that case, we will mark it deleted, when the FS
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* releases the inode, we will then, finally delete
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* the subtree.
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*/
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node->i_flags |= FSNODEFLAG_DELETED;
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return -EBUSY;
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}
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else
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{
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/* And delete it now -- recursively to delete all of its children */
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inode_free(node->i_child);
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free(node);
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return OK;
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}
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}
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/* The node does not exist or it has references */
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return -ENOENT;
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}
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