/**************************************************************************** * fs/nxffs/nxffs_stat.c * * Copyright (C) 2011, 2017-2018 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #include #include #include #include #include #include #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; }