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- /****************************************************************************
- * fs/nxffs/nxffs_unlink.c
- *
- * Copyright (C) 2011, 2013, 2017-2018 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * References: Linux/Documentation/filesystems/romfs.txt
- *
- * 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 NuttX 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 <string.h>
- #include <errno.h>
- #include <assert.h>
- #include <debug.h>
- #include <nuttx/semaphore.h>
- #include <nuttx/fs/fs.h>
- #include <nuttx/mtd/mtd.h>
- #include "nxffs.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nxffs_rminode
- *
- * Description:
- * Remove an inode from FLASH. This is the internal implementation of
- * the file system unlinke operation.
- *
- * Input Parameters:
- * volume - Describes the NXFFS volume.
- * name - the name of the inode to be deleted.
- *
- * Returned Value:
- * Zero is returned if the inode is successfully deleted. Otherwise, a
- * negated errno value is returned indicating the nature of the failure.
- *
- ****************************************************************************/
- int nxffs_rminode(FAR struct nxffs_volume_s *volume, FAR const char *name)
- {
- FAR struct nxffs_ofile_s *ofile;
- FAR struct nxffs_inode_s *inode;
- struct nxffs_entry_s entry;
- int ret;
- /* Check if the file is open */
- ofile = nxffs_findofile(volume, name);
- if (ofile)
- {
- /* We can't remove the inode if it is open */
- ferr("ERROR: Inode '%s' is open\n", name);
- ret = -EBUSY;
- goto errout;
- }
- /* Find the NXFFS inode */
- ret = nxffs_findinode(volume, name, &entry);
- if (ret < 0)
- {
- ferr("ERROR: Inode '%s' not found\n", name);
- goto errout;
- }
- /* Set the position to the FLASH offset of the file header (nxffs_findinode
- * should have left the block in the cache).
- */
- nxffs_ioseek(volume, entry.hoffset);
- /* Make sure that the block is in the cache */
- ret = nxffs_rdcache(volume, volume->ioblock);
- if (ret < 0)
- {
- ferr("ERROR: Failed to read block %d into cache: %d\n",
- volume->ioblock, ret);
- goto errout_with_entry;
- }
- /* Change the file status... it is no longer valid */
- inode = (FAR struct nxffs_inode_s *)&volume->cache[volume->iooffset];
- inode->state = INODE_STATE_DELETED;
- /* Then write the cached block back to FLASH */
- ret = nxffs_wrcache(volume);
- if (ret < 0)
- {
- ferr("ERROR: Failed to write block %d: %d\n",
- volume->ioblock, ret);
- }
- errout_with_entry:
- nxffs_freeentry(&entry);
- errout:
- return ret;
- }
- /****************************************************************************
- * Name: nxffs_unlink
- *
- * Description: Remove a file
- *
- ****************************************************************************/
- int nxffs_unlink(FAR struct inode *mountpt, FAR const char *relpath)
- {
- FAR struct nxffs_volume_s *volume;
- int ret;
- finfo("Entry\n");
- /* Sanity checks */
- DEBUGASSERT(mountpt && mountpt->i_private);
- /* Get the mountpoint private data from the NuttX inode structure */
- volume = mountpt->i_private;
- ret = nxsem_wait(&volume->exclsem);
- if (ret != OK)
- {
- goto errout;
- }
- /* Then remove the NXFFS inode */
- ret = nxffs_rminode(volume, relpath);
- nxsem_post(&volume->exclsem);
- errout:
- return ret;
- }
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