diff options
Diffstat (limited to 'nuttx/fs/fs_inoderemove.c')
-rw-r--r-- | nuttx/fs/fs_inoderemove.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/nuttx/fs/fs_inoderemove.c b/nuttx/fs/fs_inoderemove.c new file mode 100644 index 000000000..58ac734e7 --- /dev/null +++ b/nuttx/fs/fs_inoderemove.c @@ -0,0 +1,155 @@ +/**************************************************************************** + * 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 + ****************************************************************************/ + +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 ERROR; + } + + /* Find the node to delete */ + + inode_semtake(); + node = inode_search(&name, &left, &parent, 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; + inode_semgive(); + } + else + { + /* And delete it now -- recursively to delete all of its children */ + + inode_semgive(); + inode_free(node->i_child); + free(node); + return OK; + } + } + + /* The node does not exist or it has references */ + + inode_semgive(); + return ERROR; +} |