2013-01-16 16:41:27 +01:00
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/****************************************************************************
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* fs/binfs/fs_binfs.c
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*
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2021-02-03 14:47:23 +01:00
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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2013-01-16 16:41:27 +01:00
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*
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2021-02-03 14:47:23 +01:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2013-01-16 16:41:27 +01:00
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*
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2021-02-03 14:47:23 +01:00
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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2013-01-16 16:41:27 +01:00
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/statfs.h>
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#include <sys/stat.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <fcntl.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/fs/fs.h>
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2013-01-16 18:05:00 +01:00
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#include <nuttx/fs/ioctl.h>
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2019-08-23 17:07:40 +02:00
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#include <nuttx/lib/builtin.h>
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2013-01-16 16:41:27 +01:00
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2021-08-31 10:00:59 +02:00
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#include "inode/inode.h"
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2013-01-16 16:41:27 +01:00
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#if !defined(CONFIG_DISABLE_MOUNTPOINT) && defined(CONFIG_FS_BINFS)
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2022-08-05 06:31:25 +02:00
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/****************************************************************************
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* Private Type
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****************************************************************************/
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struct binfs_dir_s
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{
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struct fs_dirent_s base; /* VFS directory structure */
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unsigned int index; /* Index to the next named entry point */
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};
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2013-01-16 16:41:27 +01:00
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int binfs_open(FAR struct file *filep, const char *relpath,
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int oflags, mode_t mode);
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static int binfs_close(FAR struct file *filep);
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2020-07-02 16:03:27 +02:00
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static ssize_t binfs_read(FAR struct file *filep,
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char *buffer, size_t buflen);
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static int binfs_ioctl(FAR struct file *filep,
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int cmd, unsigned long arg);
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2013-01-16 16:41:27 +01:00
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static int binfs_dup(FAR const struct file *oldp, FAR struct file *newp);
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2020-07-02 16:03:27 +02:00
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static int binfs_fstat(FAR const struct file *filep,
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FAR struct stat *buf);
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2013-01-16 16:41:27 +01:00
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2022-08-05 06:31:25 +02:00
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static int binfs_opendir(FAR struct inode *mountpt,
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FAR const char *relpath,
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FAR struct fs_dirent_s **dir);
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static int binfs_closedir(FAR struct inode *mountpt,
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FAR struct fs_dirent_s *dir);
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2013-01-16 16:41:27 +01:00
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static int binfs_readdir(FAR struct inode *mountpt,
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2022-07-26 08:56:41 +02:00
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FAR struct fs_dirent_s *dir,
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FAR struct dirent *entry);
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2013-01-16 16:41:27 +01:00
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static int binfs_rewinddir(FAR struct inode *mountpt,
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FAR struct fs_dirent_s *dir);
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static int binfs_bind(FAR struct inode *blkdriver, FAR const void *data,
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FAR void **handle);
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2015-03-15 01:14:54 +01:00
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static int binfs_unbind(FAR void *handle, FAR struct inode **blkdriver,
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unsigned int flags);
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2013-01-16 16:41:27 +01:00
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static int binfs_statfs(FAR struct inode *mountpt,
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FAR struct statfs *buf);
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static int binfs_stat(FAR struct inode *mountpt, FAR const char *relpath,
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FAR struct stat *buf);
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/****************************************************************************
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2015-10-03 00:30:35 +02:00
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* Public Data
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2013-01-16 16:41:27 +01:00
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****************************************************************************/
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2015-03-15 14:45:19 +01:00
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/* See fs_mount.c -- this structure is explicitly extern'ed there.
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2013-01-16 16:41:27 +01:00
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* We use the old-fashioned kind of initializers so that this will compile
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* with any compiler.
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*/
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2023-04-22 16:53:42 +02:00
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const struct mountpt_operations g_binfs_operations =
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2013-01-16 16:41:27 +01:00
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{
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binfs_open, /* open */
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binfs_close, /* close */
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binfs_read, /* read */
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NULL, /* write */
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NULL, /* seek */
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binfs_ioctl, /* ioctl */
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2023-01-02 14:02:51 +01:00
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NULL, /* mmap */
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2023-01-02 18:06:12 +01:00
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NULL, /* truncate */
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2013-01-16 16:41:27 +01:00
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NULL, /* sync */
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binfs_dup, /* dup */
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2017-02-12 20:42:27 +01:00
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binfs_fstat, /* fstat */
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2021-07-09 07:43:26 +02:00
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NULL, /* fchstat */
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2013-01-16 16:41:27 +01:00
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binfs_opendir, /* opendir */
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2022-08-05 06:31:25 +02:00
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binfs_closedir, /* closedir */
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2013-01-16 16:41:27 +01:00
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binfs_readdir, /* readdir */
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binfs_rewinddir, /* rewinddir */
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binfs_bind, /* bind */
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binfs_unbind, /* unbind */
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binfs_statfs, /* statfs */
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NULL, /* unlink */
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NULL, /* mkdir */
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NULL, /* rmdir */
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NULL, /* rename */
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2021-07-09 07:43:26 +02:00
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binfs_stat, /* stat */
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NULL /* chstat */
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2013-01-16 16:41:27 +01:00
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: binfs_open
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****************************************************************************/
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static int binfs_open(FAR struct file *filep, FAR const char *relpath,
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int oflags, mode_t mode)
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{
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int index;
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2016-06-11 19:59:51 +02:00
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finfo("Open '%s'\n", relpath);
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2013-01-16 16:41:27 +01:00
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/* BINFS is read-only. Any attempt to open with any kind of write
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* access is not permitted.
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*/
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if ((oflags & O_WRONLY) != 0 || (oflags & O_RDONLY) == 0)
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{
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2016-06-11 23:50:49 +02:00
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ferr("ERROR: Only O_RDONLY supported\n");
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2013-01-16 16:41:27 +01:00
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return -EACCES;
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}
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2020-02-12 14:04:00 +01:00
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/* Check if the entry exists with this name in the root directory.
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2013-01-16 16:41:27 +01:00
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* so the 'relpath' must be the name of the builtin function.
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*/
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index = builtin_isavail(relpath);
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if (index < 0)
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{
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2019-03-17 20:42:44 +01:00
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ferr("ERROR: Built-in %s does not exist\n", relpath);
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2013-01-16 16:41:27 +01:00
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return -ENOENT;
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}
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/* Save the index as the open-specific state in filep->f_priv */
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2015-11-21 17:12:21 +01:00
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filep->f_priv = (FAR void *)((uintptr_t)index);
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2013-01-16 16:41:27 +01:00
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return OK;
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}
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/****************************************************************************
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* Name: binfs_close
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****************************************************************************/
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static int binfs_close(FAR struct file *filep)
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{
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2016-06-11 19:59:51 +02:00
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finfo("Closing\n");
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2013-01-16 16:41:27 +01:00
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return OK;
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}
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/****************************************************************************
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* Name: binfs_read
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****************************************************************************/
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2020-07-02 16:03:27 +02:00
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static ssize_t binfs_read(FAR struct file *filep,
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char *buffer, size_t buflen)
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2013-01-16 16:41:27 +01:00
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{
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/* Reading is not supported. Just return end-of-file */
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2020-11-25 12:11:25 +01:00
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finfo("Read %zu bytes from offset %jd\n",
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buflen, (intmax_t)filep->f_pos);
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2013-01-16 16:41:27 +01:00
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return 0;
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}
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/****************************************************************************
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* Name: binfs_ioctl
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****************************************************************************/
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static int binfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
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{
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int ret;
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2016-06-11 19:59:51 +02:00
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finfo("cmd: %d arg: %08lx\n", cmd, arg);
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2013-01-16 16:41:27 +01:00
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/* Only one IOCTL command is supported */
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2021-08-31 10:00:59 +02:00
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if (cmd == FIOC_FILEPATH)
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2013-01-16 16:41:27 +01:00
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{
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2021-08-31 10:00:59 +02:00
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/* IN: FAR char *(length >= PATH_MAX)
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* OUT: The full file path
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2013-01-16 16:41:27 +01:00
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*/
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2021-08-31 10:00:59 +02:00
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FAR char *ptr = (FAR char *)((uintptr_t)arg);
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2013-01-16 16:41:27 +01:00
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if (ptr == NULL)
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{
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ret = -EINVAL;
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}
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else
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{
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2021-08-31 10:00:59 +02:00
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ret = inode_getpath(filep->f_inode, ptr);
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if (ret < 0)
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{
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return ret;
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}
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strcat(ptr, builtin_getname((int)((uintptr_t)filep->f_priv)));
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2013-01-16 16:41:27 +01:00
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}
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}
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else
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{
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ret = -ENOTTY;
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}
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return ret;
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}
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/****************************************************************************
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* Name: binfs_dup
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*
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* Description:
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* Duplicate open file data in the new file structure.
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*
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****************************************************************************/
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static int binfs_dup(FAR const struct file *oldp, FAR struct file *newp)
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{
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2016-06-11 19:59:51 +02:00
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finfo("Dup %p->%p\n", oldp, newp);
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2013-01-16 16:41:27 +01:00
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/* Copy the index from the old to the new file structure */
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newp->f_priv = oldp->f_priv;
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return OK;
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}
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2017-02-12 20:42:27 +01:00
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/****************************************************************************
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* Name: binfs_fstat
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*
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* Description:
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* Obtain information about an open file associated with the file
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* descriptor 'fd', and will write it to the area pointed to by 'buf'.
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*
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****************************************************************************/
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static int binfs_fstat(FAR const struct file *filep, FAR struct stat *buf)
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{
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2017-02-12 21:47:05 +01:00
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DEBUGASSERT(filep != NULL && buf != NULL);
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/* It's a execute-only file system */
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buf->st_mode = S_IFREG | S_IXOTH | S_IXGRP | S_IXUSR;
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buf->st_size = 0;
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buf->st_blksize = 0;
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buf->st_blocks = 0;
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return OK;
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2017-02-12 20:42:27 +01:00
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}
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2013-01-16 16:41:27 +01:00
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/****************************************************************************
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* Name: binfs_opendir
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*
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* Description:
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* Open a directory for read access
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*
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****************************************************************************/
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2022-08-05 06:31:25 +02:00
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static int binfs_opendir(FAR struct inode *mountpt, FAR const char *relpath,
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FAR struct fs_dirent_s **dir)
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2013-01-16 16:41:27 +01:00
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{
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2022-08-05 06:31:25 +02:00
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FAR struct binfs_dir_s *bdir;
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2016-06-11 19:59:51 +02:00
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finfo("relpath: \"%s\"\n", relpath ? relpath : "NULL");
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2013-01-16 16:41:27 +01:00
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/* The requested directory must be the volume-relative "root" directory */
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if (relpath && relpath[0] != '\0')
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{
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return -ENOENT;
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}
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2022-08-05 06:31:25 +02:00
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bdir = kmm_zalloc(sizeof(*bdir));
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if (bdir == NULL)
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{
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return -ENOMEM;
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}
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2013-01-16 16:41:27 +01:00
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/* Set the index to the first entry */
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2022-08-05 06:31:25 +02:00
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bdir->index = 0;
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*dir = (FAR struct fs_dirent_s *)bdir;
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2013-01-16 16:41:27 +01:00
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return OK;
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}
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2022-08-05 06:31:25 +02:00
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/****************************************************************************
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* Name: binfs_closedir
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*
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* Description:
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* Close a directory
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*
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****************************************************************************/
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static int binfs_closedir(FAR struct inode *mountpt,
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FAR struct fs_dirent_s *dir)
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{
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DEBUGASSERT(dir);
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kmm_free(dir);
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return 0;
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}
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2013-01-16 16:41:27 +01:00
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/****************************************************************************
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* Name: binfs_readdir
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*
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* Description: Read the next directory entry
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*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2022-07-26 08:56:41 +02:00
|
|
|
static int binfs_readdir(FAR struct inode *mountpt,
|
|
|
|
FAR struct fs_dirent_s *dir,
|
|
|
|
FAR struct dirent *entry)
|
2013-01-16 16:41:27 +01:00
|
|
|
{
|
2022-08-05 06:31:25 +02:00
|
|
|
FAR struct binfs_dir_s *bdir;
|
2013-01-17 15:43:55 +01:00
|
|
|
FAR const char *name;
|
2013-01-16 16:41:27 +01:00
|
|
|
unsigned int index;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
/* Have we reached the end of the directory */
|
|
|
|
|
2022-08-05 06:31:25 +02:00
|
|
|
bdir = (FAR struct binfs_dir_s *)dir;
|
|
|
|
index = bdir->index;
|
2013-01-17 15:43:55 +01:00
|
|
|
name = builtin_getname(index);
|
|
|
|
if (name == NULL)
|
2013-01-16 16:41:27 +01:00
|
|
|
{
|
|
|
|
/* We signal the end of the directory by returning the
|
|
|
|
* special error -ENOENT
|
|
|
|
*/
|
|
|
|
|
2016-06-11 19:59:51 +02:00
|
|
|
finfo("Entry %d: End of directory\n", index);
|
2013-01-16 16:41:27 +01:00
|
|
|
ret = -ENOENT;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Save the filename and file type */
|
|
|
|
|
2016-06-11 19:59:51 +02:00
|
|
|
finfo("Entry %d: \"%s\"\n", index, name);
|
2022-07-26 08:56:41 +02:00
|
|
|
entry->d_type = DTYPE_FILE;
|
|
|
|
strlcpy(entry->d_name, name, sizeof(entry->d_name));
|
2013-01-16 16:41:27 +01:00
|
|
|
|
|
|
|
/* The application list is terminated by an entry with a NULL name.
|
|
|
|
* Therefore, there is at least one more entry in the list.
|
|
|
|
*/
|
|
|
|
|
|
|
|
index++;
|
|
|
|
|
|
|
|
/* Set up the next directory entry offset. NOTE that we could use the
|
2022-08-05 06:31:25 +02:00
|
|
|
* standard f_pos instead of our own private index.
|
2013-01-16 16:41:27 +01:00
|
|
|
*/
|
|
|
|
|
2022-08-05 06:31:25 +02:00
|
|
|
bdir->index = index;
|
2013-01-16 16:41:27 +01:00
|
|
|
ret = OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: binfs_rewindir
|
|
|
|
*
|
|
|
|
* Description: Reset directory read to the first entry
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
static int binfs_rewinddir(struct inode *mountpt, struct fs_dirent_s *dir)
|
|
|
|
{
|
2016-06-11 19:59:51 +02:00
|
|
|
finfo("Entry\n");
|
2013-01-16 16:41:27 +01:00
|
|
|
|
2022-08-05 06:31:25 +02:00
|
|
|
((FAR struct binfs_dir_s *)dir)->index = 0;
|
2013-01-16 16:41:27 +01:00
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: binfs_bind
|
|
|
|
*
|
|
|
|
* Description: This implements a portion of the mount operation. This
|
|
|
|
* function allocates and initializes the mountpoint private data and
|
|
|
|
* binds the blockdriver inode to the filesystem private data. The final
|
|
|
|
* binding of the private data (containing the blockdriver) to the
|
|
|
|
* mountpoint is performed by mount().
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
static int binfs_bind(FAR struct inode *blkdriver, const void *data,
|
|
|
|
void **handle)
|
|
|
|
{
|
2016-06-11 19:59:51 +02:00
|
|
|
finfo("Entry\n");
|
2013-01-16 16:41:27 +01:00
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: binfs_unbind
|
|
|
|
*
|
|
|
|
* Description: This implements the filesystem portion of the umount
|
|
|
|
* operation.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2015-03-15 00:22:02 +01:00
|
|
|
static int binfs_unbind(FAR void *handle, FAR struct inode **blkdriver,
|
|
|
|
unsigned int flags)
|
2013-01-16 16:41:27 +01:00
|
|
|
{
|
2016-06-11 19:59:51 +02:00
|
|
|
finfo("Entry\n");
|
2013-01-16 16:41:27 +01:00
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: binfs_statfs
|
|
|
|
*
|
|
|
|
* Description: Return filesystem statistics
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
static int binfs_statfs(struct inode *mountpt, struct statfs *buf)
|
|
|
|
{
|
2016-06-11 19:59:51 +02:00
|
|
|
finfo("Entry\n");
|
2013-01-16 16:41:27 +01:00
|
|
|
|
|
|
|
/* Fill in the statfs info */
|
|
|
|
|
|
|
|
memset(buf, 0, sizeof(struct statfs));
|
|
|
|
buf->f_type = BINFS_MAGIC;
|
|
|
|
buf->f_bsize = 0;
|
|
|
|
buf->f_blocks = 0;
|
|
|
|
buf->f_bfree = 0;
|
|
|
|
buf->f_bavail = 0;
|
|
|
|
buf->f_namelen = NAME_MAX;
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: binfs_stat
|
|
|
|
*
|
|
|
|
* Description: Return information about a file or directory
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2020-07-02 16:03:27 +02:00
|
|
|
static int binfs_stat(struct inode *mountpt,
|
|
|
|
const char *relpath, struct stat *buf)
|
2013-01-16 16:41:27 +01:00
|
|
|
{
|
2016-06-11 19:59:51 +02:00
|
|
|
finfo("Entry\n");
|
2013-01-16 16:41:27 +01:00
|
|
|
|
|
|
|
/* The requested directory must be the volume-relative "root" directory */
|
|
|
|
|
|
|
|
if (relpath && relpath[0] != '\0')
|
|
|
|
{
|
|
|
|
/* Check if there is a file with this name. */
|
|
|
|
|
|
|
|
if (builtin_isavail(relpath) < 0)
|
|
|
|
{
|
|
|
|
return -ENOENT;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* It's a execute-only file name */
|
|
|
|
|
2015-10-11 19:39:29 +02:00
|
|
|
buf->st_mode = S_IFREG | S_IXOTH | S_IXGRP | S_IXUSR;
|
2013-01-16 16:41:27 +01:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* It's a read/execute-only directory name */
|
|
|
|
|
2015-10-11 19:39:29 +02:00
|
|
|
buf->st_mode = S_IFDIR | S_IROTH | S_IRGRP | S_IRUSR | S_IXOTH |
|
|
|
|
S_IXGRP | S_IXUSR;
|
2013-01-16 16:41:27 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* File/directory size, access block size */
|
|
|
|
|
|
|
|
buf->st_size = 0;
|
|
|
|
buf->st_blksize = 0;
|
|
|
|
buf->st_blocks = 0;
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Public Functions
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
#endif /* !CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_BINFS */
|