fe089ab1a3
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3542 42af7a65-404d-4744-a932-0658087f49c3
350 lines
9.9 KiB
C
350 lines
9.9 KiB
C
/****************************************************************************
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* examples/nxffs/nxffs_main.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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/mount.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <crc32.h>
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#include <nuttx/mtd.h>
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#include <nuttx/nxffs.h>
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* This must exactly match the default configuration in drivers/mtd/rammtd.c */
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#ifndef CONFIG_RAMMTD_BLOCKSIZE
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# define CONFIG_RAMMTD_BLOCKSIZE 512
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#endif
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#ifndef CONFIG_RAMMTD_ERASESIZE
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# define CONFIG_RAMMTD_ERASESIZE 4096
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#endif
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#ifndef CONFIG_EXAMPLES_NXFFS_NEBLOCKS
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# define CONFIG_EXAMPLES_NXFFS_NEBLOCKS (32)
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#endif
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#undef CONFIG_EXAMPLES_NXFFS_BUFSIZE
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#define CONFIG_EXAMPLES_NXFFS_BUFSIZE \
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(CONFIG_RAMMTD_ERASESIZE * CONFIG_EXAMPLES_NXFFS_NEBLOCKS)
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#ifndef CONFIG_EXAMPLES_NXFFS_MAXNAME
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# define CONFIG_EXAMPLES_NXFFS_MAXNAME 128
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#endif
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#if CONFIG_EXAMPLES_NXFFS_MAXNAME > 255
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# undef CONFIG_EXAMPLES_NXFFS_MAXNAME
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# define CONFIG_EXAMPLES_NXFFS_MAXNAME 255
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#endif
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#ifndef CONFIG_EXAMPLES_NXFFS_MAXFILE
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# define CONFIG_EXAMPLES_NXFFS_MAXFILE 8192
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#endif
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#ifndef CONFIG_EXAMPLES_NXFFS_MAXIO
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# define CONFIG_EXAMPLES_NXFFS_MAXIO 347
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#endif
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#ifndef CONFIG_EXAMPLES_NXFFS_MAXOPEN
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# define CONFIG_EXAMPLES_NXFFS_MAXOPEN 512
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#endif
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#ifndef CONFIG_EXAMPLES_NXFFS_MOUNTPT
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# define CONFIG_EXAMPLES_NXFFS_MOUNTPT "/mnt/nxffs"
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct nxffs_filedesc_s
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{
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FAR char *name;
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size_t len;
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uint32_t crc;
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* Pre-allocated simulated flash */
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static uint8_t g_simflash[CONFIG_EXAMPLES_NXFFS_BUFSIZE];
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static uint8_t g_fileimage[CONFIG_EXAMPLES_NXFFS_MAXFILE];
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static struct nxffs_filedesc_s g_files[CONFIG_EXAMPLES_NXFFS_MAXOPEN];
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static const char g_mountdir[] = CONFIG_EXAMPLES_NXFFS_MOUNTPT "/";
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static int g_nfiles;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxffs_randchar
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****************************************************************************/
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static inline char nxffs_randchar(void)
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{
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int value = rand() % 63;
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if (value == 0)
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{
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return '/';
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}
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else if (value <= 10)
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{
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return value + '0' - 1;
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}
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else if (value <= 36)
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{
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return value + 'a' - 11;
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}
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else /* if (value <= 62) */
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{
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return value + 'A' - 37;
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}
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}
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/****************************************************************************
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* Name: nxffs_randname
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****************************************************************************/
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static inline void nxffs_randname(FAR struct nxffs_filedesc_s *file)
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{
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int dirlen;
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int maxname;
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int namelen;
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int alloclen;
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int i;
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dirlen = strlen(g_mountdir);
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maxname = CONFIG_EXAMPLES_NXFFS_MAXNAME - dirlen;
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namelen = (rand() % maxname) + 1;
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alloclen = namelen + dirlen;
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file->name = (FAR char*)malloc(alloclen + 1);
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if (!file->name)
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{
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fprintf(stderr, "ERROR: Failed to allocate name, length=%d\n", namelen);
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exit(3);
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}
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memcpy(file->name, g_mountdir, dirlen);
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for (i = dirlen; i < alloclen; i++)
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{
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file->name[i] = nxffs_randchar();
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}
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file->name[alloclen] = '\0';
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}
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/****************************************************************************
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* Name: nxffs_randfile
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****************************************************************************/
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static inline void nxffs_randfile(FAR struct nxffs_filedesc_s *file)
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{
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int i;
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file->len = (rand() % CONFIG_EXAMPLES_NXFFS_MAXFILE) + 1;
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for (i = 0; i < file->len; i++)
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{
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g_fileimage[i] = nxffs_randchar();
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}
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file->crc = crc32(g_fileimage, file->len);
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}
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/****************************************************************************
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* Name: nxffs_freefile
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****************************************************************************/
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static void nxffs_freefile(FAR struct nxffs_filedesc_s *file)
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{
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if (file->name)
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{
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free(file->name);
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}
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memset(file, 0, sizeof(struct nxffs_filedesc_s));
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}
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/****************************************************************************
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* Name: nxffs_wrfile
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****************************************************************************/
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static inline int nxffs_wrfile(void)
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{
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struct nxffs_filedesc_s *file = NULL;
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size_t offset;
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int fd;
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int i;
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for (i = 0; i < CONFIG_EXAMPLES_NXFFS_MAXOPEN; i++)
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{
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if (g_files[i].name == NULL)
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{
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file = &g_files[i];
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break;
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}
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}
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if (!file)
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{
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fprintf(stderr, "No available files\n");
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return ERROR;
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}
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nxffs_randname(file);
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nxffs_randfile(file);
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fd = open(file->name, O_WRONLY, 0666);
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if (fd < 0)
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{
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fprintf(stderr, "Failed to open file: %d\n", errno);
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fprintf(stderr, " File name: %s\n", file->name);
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fprintf(stderr, " File size: %d\n", file->len);
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nxffs_freefile(file);
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return ERROR;
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}
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for (offset = 0; offset < file->len; )
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{
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size_t maxio = (rand() % CONFIG_EXAMPLES_NXFFS_MAXIO) + 1;
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size_t nbytestowrite = file->len - offset;
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ssize_t nbyteswritten;
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if (nbytestowrite > maxio)
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{
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nbytestowrite = maxio;
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}
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nbyteswritten = write(fd, &g_fileimage[offset], nbytestowrite);
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if (nbyteswritten < 0)
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{
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fprintf(stderr, "Failed to write file: %d\n", errno);
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fprintf(stderr, " File name: %s\n", file->name);
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fprintf(stderr, " File size: %d\n", file->len);
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fprintf(stderr, " Write offset: %d\n", offset);
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fprintf(stderr, " Write size: %d\n", nbytestowrite);
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nxffs_freefile(file);
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close(fd);
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return ERROR;
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}
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else if (nbyteswritten != nbytestowrite)
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{
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fprintf(stderr, "Partial write:\n");
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fprintf(stderr, " File name: %s\n", file->name);
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fprintf(stderr, " File size: %d\n", file->len);
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fprintf(stderr, " Write offset: %d\n", offset);
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fprintf(stderr, " Write size: %d\n", nbytestowrite);
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fprintf(stderr, " Written: %d\n", nbyteswritten);
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}
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offset += nbyteswritten;
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}
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close(fd);
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g_nfiles++;
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return OK;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: user_start
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****************************************************************************/
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int user_start(int argc, char *argv[])
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{
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FAR struct mtd_dev_s *mtd;
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int ret;
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/* Seed the random number generated */
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srand(0x93846);
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/* Create and initialize a RAM MTD device instance */
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mtd = rammtd_initialize(g_simflash, CONFIG_EXAMPLES_NXFFS_BUFSIZE);
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if (!mtd)
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{
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fprintf(stderr, "ERROR: Failed to create RAM MTD instance\n");
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exit(1);
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}
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/* Initialize to provide NXFFS on an MTD interface */
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ret = nxffs_initialize(mtd);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: NXFFS initialization failed: %d\n", -ret);
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exit(2);
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}
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/* Mount the file system */
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ret = mount(NULL, CONFIG_EXAMPLES_NXFFS_MOUNTPT, "nxffs", 0, NULL);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: Failed to mount the NXFFS volume: %d\n", errno);
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exit(3);
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}
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/* Then write a file to the NXFFS file system */
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ret = nxffs_wrfile();
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: Failed to write a file\n");
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exit(3);
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}
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return 0;
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}
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