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/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* Filesystem manager File: cfe_filesys.c
*
* This module maintains the list of available file systems.
*
* Author: Mitch Lichtenberg (mpl@broadcom.com)
*
*********************************************************************
*
* Copyright 2000,2001,2002,2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and
* conditions. Subject to these conditions, you may download,
* copy, install, use, modify and distribute modified or unmodified
* copies of this software in source and/or binary form. No title
* or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions
* as they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or
* logo of Broadcom Corporation. The "Broadcom Corporation"
* name may not be used to endorse or promote products derived
* from this software without the prior written permission of
* Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
* SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
* PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR 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), EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************* */
#include "lib_types.h"
#include "lib_string.h"
#include "lib_malloc.h"
#include "cfe_error.h"
#include "cfe_fileops.h"
#include "cfe.h"
#include "bsp_config.h"
/* *********************************************************************
* Externs
********************************************************************* */
extern const fileio_dispatch_t raw_fileops;
#if CFG_NETWORK
extern const fileio_dispatch_t tftp_fileops;
#if (CFG_TCP) && (CFG_HTTPFS)
extern const fileio_dispatch_t http_fileops;
#endif
#endif
#if CFG_FATFS
extern const fileio_dispatch_t fatfs_fileops;
extern const fileio_dispatch_t pfatfs_fileops;
#endif
#if CFG_ZLIB
extern const fileio_dispatch_t zlibfs_fileops;
#endif
/* *********************************************************************
* File system list
********************************************************************* */
static const fileio_dispatch_t * const cfe_filesystems[] = {
#if !defined(CONFIG_MIPS_BRCM)
&raw_fileops,
#endif
#if CFG_NETWORK
&tftp_fileops,
#if (CFG_TCP) & (CFG_HTTPFS)
&http_fileops,
#endif
#endif
#if CFG_FATFS
&fatfs_fileops,
&pfatfs_fileops,
#endif
#if CFG_ZLIB
&zlibfs_fileops,
#endif
NULL
};
/* *********************************************************************
* cfe_findfilesys(name)
*
* Locate the dispatch record for a particular file system.
*
* Input parameters:
* name - name of filesys to locate
*
* Return value:
* pointer to dispatch table or NULL if not found
********************************************************************* */
const fileio_dispatch_t *cfe_findfilesys(const char *name)
{
const fileio_dispatch_t * const *disp;
disp = cfe_filesystems;
while (*disp) {
if (strcmp((*disp)->method,name) == 0) return *disp;
disp++;
}
return NULL;
}
/* *********************************************************************
* fs_init(name,fsctx,device)
*
* Initialize a filesystem context
*
* Input parameters:
* name - name of file system
* fsctx - returns a filesystem context
* device - device name or other info
*
* Return value:
* 0 if ok
* else error code
********************************************************************* */
int fs_init(char *fsname,fileio_ctx_t **fsctx,void *device)
{
fileio_ctx_t *ctx;
int res;
const fileio_dispatch_t *ops;
ops = cfe_findfilesys((const char *)fsname);
if (!ops) return CFE_ERR_FSNOTAVAIL;
ctx = (fileio_ctx_t *) KMALLOC(sizeof(fileio_ctx_t),0);
if (!ctx) return CFE_ERR_NOMEM;
ctx->ops = ops;
res = BDINIT(ops,&(ctx->fsctx),device);
if (res != 0) {
KFREE(ctx);
}
*fsctx = ctx;
return res;
}
/* *********************************************************************
* fs_hook(fsctx,name)
*
* "Hook" a filesystem to attach a filter, like a decompression
* or decryption engine.
*
* Input parameters:
* fsctx - result from a previous fs_init
* name - name of fs to hook onto the beginning
*
* Return value:
* 0 if ok
* else error
********************************************************************* */
int fs_hook(fileio_ctx_t *fsctx,char *fsname)
{
void *hookfsctx;
const fileio_dispatch_t *ops;
int res;
/*
* Find the hook filesystem (well, actually a filter)
*/
ops = cfe_findfilesys((const char *)fsname);
if (!ops) return CFE_ERR_FSNOTAVAIL;
/*
* initialize our hook file filter.
*/
res = BDINIT(ops,&hookfsctx,fsctx);
if (res != 0) return res;
/*
* Now replace dispatch table for current filesystem
* with the hook's dispatch table. When fs_read is called,
* we'll go to the hook, and the hook will call the original.
*
* When fs_uninit is called, the hook will call the original's
* uninit routine.
*/
fsctx->ops = ops;
fsctx->fsctx = hookfsctx;
return 0;
}
/* *********************************************************************
* fs_uninit(fsctx)
*
* Uninitialize a file system context.
*
* Input parameters:
* fsctx - filesystem context to remove (from fs_init)
*
* Return value:
* 0 if ok
* else error
********************************************************************* */
int fs_uninit(fileio_ctx_t *fsctx)
{
BDUNINIT(fsctx->ops,fsctx->fsctx);
KFREE(fsctx);
return 0;
}
/* *********************************************************************
* fs_open(fsctx,ref,filename,mode)
*
* Open a file on the file system
*
* Input parameters:
* fsctx - filesystem context (from fs_init)
* ref - returns file handle
* filename - name of file to open
* mode - file open mode
*
* Return value:
* 0 if ok
* else error code
********************************************************************* */
int fs_open(fileio_ctx_t *fsctx,void **ref,char *filename,int mode)
{
return BDOPEN2(fsctx->ops,ref,fsctx->fsctx,filename,mode);
}
/* *********************************************************************
* fs_close(fsctx,ref)
*
* Close a file on the file system
*
* Input parameters:
* fsctx - filesystem context (from fs_init)
* ref - file handle (from fs_open)
*
* Return value:
* 0 if ok
* else error code
********************************************************************* */
int fs_close(fileio_ctx_t *fsctx,void *ref)
{
BDCLOSE(fsctx->ops,ref);
return 0;
}
/* *********************************************************************
* fs_read(fsctx,ref,buffer,len)
*
* Read data from the device.
*
* Input parameters:
* fsctx - filesystem context (from fs_init)
* ref - file handle (from fs_open)
* buffer - buffer pointer
* len - length
*
* Return value:
* number of bytes read
* 0=eof
* <0 = error
********************************************************************* */
int fs_read(fileio_ctx_t *fsctx,void *ref,uint8_t *buffer,int len)
{
return BDREAD(fsctx->ops,ref,buffer,len);
}
/* *********************************************************************
* fs_write(fsctx,ref,buffer,len)
*
* write data from the device.
*
* Input parameters:
* fsctx - filesystem context (from fs_init)
* ref - file handle (from fs_open)
* buffer - buffer pointer
* len - length
*
* Return value:
* number of bytes written
* 0=eof
* <0 = error
********************************************************************* */
int fs_write(fileio_ctx_t *fsctx,void *ref,uint8_t *buffer,int len)
{
return BDWRITE(fsctx->ops,ref,buffer,len);
}
/* *********************************************************************
* fs_seek(fsctx,ref,offset,how)
*
* move file pointer on the device
*
* Input parameters:
* fsctx - filesystem context (from fs_init)
* ref - file handle (from fs_open)
* offset - distance to move
* how - origin (FILE_SEEK_xxx)
*
* Return value:
* new offset
* <0 = error
********************************************************************* */
int fs_seek(fileio_ctx_t *fsctx,void *ref,int offset,int how)
{
return BDSEEK(fsctx->ops,ref,offset,how);
}
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