| /**************************************************************************** |
| * fs_inoderemove.c |
| * |
| * Copyright (C) 2007 Gregory Nutt. All rights reserved. |
| * Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source 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 Gregory Nutt 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 <stdlib.h> |
| #include <errno.h> |
| #include <nuttx/fs.h> |
| #include "fs_internal.h" |
| |
| /**************************************************************************** |
| * Definitions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Private Variables |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Public Variables |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Private Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: inode_unlink |
| ****************************************************************************/ |
| |
| static void inode_unlink(struct inode *node, |
| struct inode *peer, |
| struct inode *parent) |
| { |
| /* If peer is non-null, then remove the node from the right of |
| * of that peer node. |
| */ |
| |
| if (peer) |
| { |
| peer->i_peer = node->i_peer; |
| } |
| |
| /* If parent is non-null, then remove the node from head of |
| * of the list of children. |
| */ |
| |
| else if (parent) |
| { |
| parent->i_child = node->i_peer; |
| } |
| |
| /* Otherwise, we must be removing the root inode. */ |
| |
| else |
| { |
| root_inode = node->i_peer; |
| } |
| node->i_peer = NULL; |
| } |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: inode_remove |
| * |
| * NOTE: Caller must hold the inode semaphore |
| ****************************************************************************/ |
| |
| STATUS inode_remove(const char *path) |
| { |
| const char *name = path; |
| FAR struct inode *node; |
| FAR struct inode *left; |
| FAR struct inode *parent; |
| |
| if (!*path || path[0] != '/') |
| { |
| return -EINVAL; |
| } |
| |
| /* Find the node to delete */ |
| |
| node = inode_search(&name, &left, &parent, (const char **)NULL); |
| if (node) |
| { |
| /* Found it, now remove it from the tree */ |
| |
| inode_unlink(node, left, parent); |
| |
| /* We cannot delete it if there reference to the inode */ |
| |
| if (node->i_crefs) |
| { |
| /* In that case, we will mark it deleted, when the FS |
| * releases the inode, we will then, finally delete |
| * the subtree. |
| */ |
| |
| node->i_flags |= FSNODEFLAG_DELETED; |
| return -EBUSY; |
| } |
| else |
| { |
| /* And delete it now -- recursively to delete all of its children */ |
| |
| inode_free(node->i_child); |
| free(node); |
| return OK; |
| } |
| } |
| |
| /* The node does not exist or it has references */ |
| |
| return -ENOENT; |
| } |