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141 lines
4.8 KiB
141 lines
4.8 KiB
/**************************************************************************** |
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* examples/mount/ramdisk.c |
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* |
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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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 <stdbool.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <nuttx/ramdisk.h> |
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#include <nuttx/fs/mkfatfs.h> |
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#include "mount.h" |
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#ifndef CONFIG_EXAMPLES_MOUNT_DEVNAME |
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/**************************************************************************** |
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* Private Definitions |
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****************************************************************************/ |
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#define BUFFER_SIZE (CONFIG_EXAMPLES_MOUNT_NSECTORS*CONFIG_EXAMPLES_MOUNT_SECTORSIZE) |
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/**************************************************************************** |
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* Private Types |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Function Prototypes |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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static struct fat_format_s g_fmt = FAT_FORMAT_INITIALIZER; |
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/**************************************************************************** |
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* Private Functions |
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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: create_ramdisk |
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* |
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* Description: |
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* Create a RAM disk of the specified size formatting with a FAT file |
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* system |
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* |
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* Input Parameters: |
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* None |
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* |
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* Return: |
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* Zero on success, a negated errno on failure. |
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* |
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****************************************************************************/ |
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int create_ramdisk(void) |
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{ |
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char *pbuffer; |
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int ret; |
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/* Allocate a buffer to hold the file system image. */ |
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pbuffer = (char*)malloc(BUFFER_SIZE); |
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if (!pbuffer) |
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{ |
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printf("create_ramdisk: Failed to allocate ramdisk of size %d\n", |
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BUFFER_SIZE); |
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return -ENOMEM; |
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} |
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/* Register a RAMDISK device to manage this RAM image */ |
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ret = ramdisk_register(CONFIG_EXAMPLES_MOUNT_RAMDEVNO, |
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pbuffer, |
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CONFIG_EXAMPLES_MOUNT_NSECTORS, |
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CONFIG_EXAMPLES_MOUNT_SECTORSIZE, |
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true); |
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if (ret < 0) |
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{ |
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printf("create_ramdisk: Failed to register ramdisk at %s: %d\n", |
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g_source, -ret); |
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free(pbuffer); |
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return ret; |
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} |
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/* Create a FAT filesystem on the ramdisk */ |
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ret = mkfatfs(g_source, &g_fmt); |
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if (ret < 0) |
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{ |
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printf("create_ramdisk: Failed to create FAT filesystem on ramdisk at %s\n", |
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g_source); |
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/* free(pbuffer); -- RAM disk is registered */ |
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return ret; |
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} |
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return 0; |
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} |
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#endif /* !CONFIG_EXAMPLES_MOUNT_DEVNAME */
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