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- /****************************************************************************
- * fs/nxffs/nxffs_stat.c
- *
- * Copyright (C) 2011, 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 <sys/stat.h>
- #include <sys/statfs.h>
- #include <string.h>
- #include <fcntl.h>
- #include <assert.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/fs/fs.h>
- #include <nuttx/mtd/mtd.h>
- #include "nxffs.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nxffs_statfs
- *
- * Description: Return filesystem statistics
- *
- ****************************************************************************/
- int nxffs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf)
- {
- 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 < 0)
- {
- goto errout;
- }
- /* Fill in the statfs info
- *
- * REVISIT: Need f_bfree, f_bavail, f_files, f_ffree calculation
- */
- memset(buf, 0, sizeof(struct statfs));
- buf->f_type = NXFFS_MAGIC;
- buf->f_bsize = volume->geo.blocksize;
- buf->f_blocks = volume->nblocks;
- buf->f_namelen = volume->geo.blocksize - SIZEOF_NXFFS_BLOCK_HDR -
- SIZEOF_NXFFS_INODE_HDR;
- ret = OK;
- nxsem_post(&volume->exclsem);
- errout:
- return ret;
- }
- /****************************************************************************
- * Name: nxffs_stat
- *
- * Description: Return information about a file or directory
- *
- ****************************************************************************/
- int nxffs_stat(FAR struct inode *mountpt, FAR const char *relpath,
- FAR struct stat *buf)
- {
- FAR struct nxffs_volume_s *volume;
- struct nxffs_entry_s entry;
- int ret;
- finfo("Entry\n");
- /* Sanity checks */
- DEBUGASSERT(mountpt && mountpt->i_private && buf);
- /* Get the mountpoint private data from the NuttX inode structure */
- volume = mountpt->i_private;
- ret = nxsem_wait(&volume->exclsem);
- if (ret != OK)
- {
- goto errout;
- }
- /* Initialize the return stat instance */
- memset(buf, 0, sizeof(struct stat));
- buf->st_blksize = volume->geo.blocksize;
- /* The requested directory must be the volume-relative "root" directory */
- if (relpath && relpath[0] != '\0')
- {
- /* Not the top directory.. find the NXFFS inode with this name */
- ret = nxffs_findinode(volume, relpath, &entry);
- if (ret < 0)
- {
- ferr("ERROR: Inode '%s' not found: %d\n", -ret);
- goto errout_with_semaphore;
- }
- /* Return status information based on the directory entry */
- buf->st_blocks = entry.datlen /
- (volume->geo.blocksize - SIZEOF_NXFFS_BLOCK_HDR);
- buf->st_mode = S_IFREG | S_IXOTH | S_IXGRP | S_IXUSR;
- buf->st_size = entry.datlen;
- buf->st_atime = entry.utc;
- buf->st_mtime = entry.utc;
- buf->st_ctime = entry.utc;
- /* Free inode resources */
- nxffs_freeentry(&entry);
- }
- else
- {
- /* It's a read/execute-only directory name */
- buf->st_mode = S_IFDIR | S_IROTH | S_IRGRP | S_IRUSR | S_IXOTH |
- S_IXGRP | S_IXUSR;
- }
- ret = OK;
- errout_with_semaphore:
- nxsem_post(&volume->exclsem);
- errout:
- return ret;
- }
- /****************************************************************************
- * Name: nxffs_fstat
- *
- * Description:
- * Obtain information about an open file associated with the file
- * descriptor 'fd', and will write it to the area pointed to by 'buf'.
- *
- ****************************************************************************/
- int nxffs_fstat(FAR const struct file *filep, FAR struct stat *buf)
- {
- FAR struct nxffs_volume_s *volume;
- FAR struct nxffs_ofile_s *ofile;
- int ret;
- finfo("Buf %s\n", buf);
- DEBUGASSERT(filep != NULL && buf != NULL);
- /* Recover the open file state from the struct file instance */
- DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
- ofile = (FAR struct nxffs_ofile_s *)filep->f_priv;
- /* Recover the volume state from the open file */
- volume = (FAR struct nxffs_volume_s *)filep->f_inode->i_private;
- DEBUGASSERT(volume != NULL);
- /* Get exclusive access to the volume. Note that the volume exclsem
- * protects the open file list.
- */
- ret = nxsem_wait(&volume->exclsem);
- if (ret != OK)
- {
- ferr("ERROR: nxsem_wait failed: %d\n", ret);
- return ret;
- }
- /* Return status information based on the directory entry */
- buf->st_blocks = ofile->entry.datlen /
- (volume->geo.blocksize - SIZEOF_NXFFS_BLOCK_HDR);
- buf->st_mode = S_IFREG | S_IXOTH | S_IXGRP | S_IXUSR;
- buf->st_size = ofile->entry.datlen;
- buf->st_atime = ofile->entry.utc;
- buf->st_mtime = ofile->entry.utc;
- buf->st_ctime = ofile->entry.utc;
- nxsem_post(&volume->exclsem);
- return OK;
- }
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