2136 lines
64 KiB
C
2136 lines
64 KiB
C
/****************************************************************************
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* fs/smartfs/smartfs_utils.c
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*
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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 <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.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/kmalloc.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/fs/ioctl.h>
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#include "smartfs.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define WORKBUFFER_SIZE 256
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#if defined(CONFIG_SMARTFS_MULTI_ROOT_DIRS) || \
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(defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_SMARTFS))
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static struct smartfs_mountpt_s *g_mounthead = NULL;
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: smartfs_rdle16
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*
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* Description:
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* Get a (possibly unaligned) 16-bit little endian value.
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*
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* Input Parameters:
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* val - A pointer to the first byte of the little endian value.
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*
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* Returned Value:
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* A uint16_t representing the whole 16-bit integer value
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*
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****************************************************************************/
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uint16_t smartfs_rdle16(FAR const void *val)
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{
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return (uint16_t)((FAR const uint8_t *)val)[1] << 8 |
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(uint16_t)((FAR const uint8_t *)val)[0];
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}
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/****************************************************************************
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* Name: smartfs_wrle16
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*
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* Description:
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* Put a (possibly unaligned) 16-bit little endian value.
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*
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* Input Parameters:
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* dest - A pointer to the first byte to save the little endian value.
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* val - The 16-bit value to be saved.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void smartfs_wrle16(FAR void *dest, uint16_t val)
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{
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((FAR uint8_t *) dest)[0] = val & 0xff; /* Little endian means LS byte first in byte stream */
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((FAR uint8_t *) dest)[1] = val >> 8;
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}
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/****************************************************************************
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* Name: smartfs_rdle32
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*
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* Description:
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* Get a (possibly unaligned) 32-bit little endian value.
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*
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* Input Parameters:
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* val - A pointer to the first byte of the little endian value.
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*
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* Returned Value:
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* A uint32_t representing the whole 32-bit integer value
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*
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****************************************************************************/
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uint32_t smartfs_rdle32(FAR const void *val)
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{
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/* Little endian means LS halfword first in byte stream */
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return (uint32_t)smartfs_rdle16(&((FAR const uint8_t *)val)[2]) << 16 |
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(uint32_t)smartfs_rdle16(val);
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}
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/****************************************************************************
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* Name: smartfs_wrle32
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*
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* Description:
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* Put a (possibly unaligned) 32-bit little endian value.
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*
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* Input Parameters:
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* dest - A pointer to the first byte to save the little endian value.
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* val - The 32-bit value to be saved.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void smartfs_wrle32(uint8_t *dest, uint32_t val)
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{
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/* Little endian means LS halfword first in byte stream */
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smartfs_wrle16(dest, (uint16_t)(val & 0xffff));
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smartfs_wrle16(dest + 2, (uint16_t)(val >> 16));
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}
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/****************************************************************************
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* Name: smartfs_mount
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*
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* Description: This function is called only when the mountpoint is first
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* established. It initializes the mountpoint structure and verifies
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* that a valid SMART filesystem is provided by the block driver.
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*
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* The caller should hold the mountpoint semaphore
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*
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****************************************************************************/
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int smartfs_mount(FAR struct smartfs_mountpt_s *fs, bool writeable)
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{
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FAR struct inode *inode;
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struct geometry geo;
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int ret = OK;
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#if defined(CONFIG_SMARTFS_MULTI_ROOT_DIRS)
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struct smartfs_mountpt_s *nextfs;
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#endif
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/* Assume that the mount is not successful */
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fs->fs_mounted = false;
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/* Check if there is media available */
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inode = fs->fs_blkdriver;
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if (!inode || !inode->u.i_bops || !inode->u.i_bops->geometry ||
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inode->u.i_bops->geometry(inode, &geo) != OK || !geo.geo_available)
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{
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ret = -ENODEV;
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goto errout;
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}
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/* Make sure that that the media is write-able
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* (if write access is needed)
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*/
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if (writeable && !geo.geo_writeenabled)
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{
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ret = -EACCES;
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goto errout;
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}
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/* Get the SMART low-level format information to validate the device has
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* been formatted and scan properly for logical to physical sector mapping.
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*/
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ret = FS_IOCTL(fs, BIOC_GETFORMAT, (unsigned long) &fs->fs_llformat);
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if (ret != OK)
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{
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ferr("ERROR: Error getting device low level format: %d\n", ret);
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goto errout;
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}
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/* Validate the low-level format is valid */
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if (!(fs->fs_llformat.flags & SMART_FMT_ISFORMATTED))
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{
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ferr("ERROR: No low-level format found\n");
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ret = -ENODEV;
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goto errout;
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}
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/* Allocate a read/write buffer */
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#ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
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/* Scan linked list of mounted file systems to find another FS with
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* the same blockdriver. We will reuse the buffers.
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*/
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nextfs = g_mounthead;
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while (nextfs != NULL)
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{
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/* Test if this FS uses the same block driver */
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if (nextfs->fs_blkdriver == fs->fs_blkdriver)
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{
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/* Yep, it's the same block driver. Reuse the buffers.
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* we can do this because we are protected by the same
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* semaphore.
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*/
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fs->fs_rwbuffer = nextfs->fs_rwbuffer;
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fs->fs_workbuffer = nextfs->fs_workbuffer;
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break;
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}
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/* Advance to next FS */
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nextfs = nextfs->fs_next;
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}
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/* If we didn't find a FS above, then allocate some buffers */
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if (nextfs == NULL)
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{
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fs->fs_rwbuffer = kmm_malloc(fs->fs_llformat.availbytes);
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fs->fs_workbuffer = kmm_malloc(WORKBUFFER_SIZE);
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}
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/* Now add ourselves to the linked list of SMART mounts */
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fs->fs_next = g_mounthead;
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g_mounthead = fs;
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/* Set our root directory sector based on the directory entry
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* reported by the block driver (based on which device is
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* associated with this mount.
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*/
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fs->fs_rootsector = SMARTFS_ROOT_DIR_SECTOR + fs->fs_llformat.rootdirnum;
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#else /* CONFIG_SMARTFS_MULTI_ROOT_DIRS */
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#if defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_SMARTFS)
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/* Now add ourselves to the linked list of SMART mounts */
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fs->fs_next = g_mounthead;
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g_mounthead = fs;
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#endif
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fs->fs_rwbuffer = kmm_malloc(fs->fs_llformat.availbytes);
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fs->fs_workbuffer = kmm_malloc(WORKBUFFER_SIZE);
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fs->fs_rootsector = SMARTFS_ROOT_DIR_SECTOR;
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#endif /* CONFIG_SMARTFS_MULTI_ROOT_DIRS */
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/* We did it! */
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fs->fs_mounted = true;
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finfo("SMARTFS:\n");
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finfo("\t Sector size: %d\n", fs->fs_llformat.sectorsize);
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finfo("\t Bytes/sector %d\n", fs->fs_llformat.availbytes);
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finfo("\t Num sectors: %d\n", fs->fs_llformat.nsectors);
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finfo("\t Free sectors: %d\n", fs->fs_llformat.nfreesectors);
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finfo("\t Max filename: %d\n", CONFIG_SMARTFS_MAXNAMLEN);
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#ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
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finfo("\t RootDirEntries: %d\n", fs->fs_llformat.nrootdirentries);
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#endif
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finfo("\t RootDirSector: %d\n", fs->fs_rootsector);
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errout:
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return ret;
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}
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/****************************************************************************
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* Name: smartfs_unmount
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*
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* Description: This function is called only when the mountpoint is being
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* unbound. If we are serving multiple directories, then we have to
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* remove ourselves from the mount linked list, and potentially free
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* the shared buffers.
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*
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* The caller should hold the mountpoint semaphore
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*
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****************************************************************************/
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int smartfs_unmount(FAR struct smartfs_mountpt_s *fs)
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{
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int ret = OK;
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FAR struct inode *inode;
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#if defined(CONFIG_SMARTFS_MULTI_ROOT_DIRS) || \
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(defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_SMARTFS))
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FAR struct smartfs_mountpt_s *nextfs;
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FAR struct smartfs_mountpt_s *prevfs;
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int count = 0;
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bool found = false;
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#endif
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#if defined(CONFIG_SMARTFS_MULTI_ROOT_DIRS) || \
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(defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_SMARTFS))
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/* Start at the head of the mounts and search for our entry. Also
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* count the number of entries that match our blkdriver.
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*/
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nextfs = g_mounthead;
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prevfs = NULL;
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while (nextfs != NULL)
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{
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/* Test if this FS's blkdriver matches ours (it could be us) */
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if (nextfs->fs_blkdriver == fs->fs_blkdriver)
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count++;
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/* Test if this entry is our's */
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if (nextfs == fs)
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{
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found = true;
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}
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/* Keep track of the previous entry until our's is found */
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if (!found)
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{
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/* Save this entry as the previous entry */
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prevfs = nextfs;
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}
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/* Advance to the next entry */
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nextfs = nextfs->fs_next;
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}
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/* Ensure we found our FS */
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if (!found)
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{
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/* Our entry not found! Invalid unmount or bug somewhere */
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return -EINVAL;
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}
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/* If the count is only one, then we need to delete the shared
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* buffers because we are the last ones.
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*/
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if (count == 1)
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{
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/* Close the block driver */
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if (fs->fs_blkdriver)
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{
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inode = fs->fs_blkdriver;
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if (inode)
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{
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if (inode->u.i_bops && inode->u.i_bops->close)
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{
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inode->u.i_bops->close(inode);
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}
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}
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}
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/* Free the buffers */
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kmm_free(fs->fs_rwbuffer);
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kmm_free(fs->fs_workbuffer);
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|
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/* Set the buffer's to invalid value to catch program bugs */
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|
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fs->fs_rwbuffer = (FAR char *)0xdeadbeef;
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fs->fs_workbuffer = (FAR char *)0xdeadbeef;
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}
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|
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/* Now removed ourselves from the linked list */
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|
|
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if (fs == g_mounthead)
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{
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/* We were the first ones. Set a new head */
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g_mounthead = fs->fs_next;
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}
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else
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{
|
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/* Remove from the middle of the list somewhere */
|
|
|
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prevfs->fs_next = fs->fs_next;
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}
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#else
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if (fs->fs_blkdriver)
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{
|
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inode = fs->fs_blkdriver;
|
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if (inode)
|
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{
|
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if (inode->u.i_bops && inode->u.i_bops->close)
|
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{
|
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inode->u.i_bops->close(inode);
|
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}
|
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}
|
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}
|
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|
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/* Release the mountpoint private data */
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|
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kmm_free(fs->fs_rwbuffer);
|
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kmm_free(fs->fs_workbuffer);
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#endif
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|
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return ret;
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}
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|
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/****************************************************************************
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* Name: smartfs_finddirentry
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*
|
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* Description: Finds an entry in the filesystem as specified by relpath.
|
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* If found, the direntry will be populated with information
|
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* for accessing the entry.
|
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*
|
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* If the final directory segment of relpath just before the
|
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* last segment (the target file/dir) is valid, then the
|
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* parentdirsector will indicate the logical sector number of
|
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* the parent directory where a new entry should be created,
|
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* and the filename pointer will point to the final segment
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* (i.e. the "filename").
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*
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****************************************************************************/
|
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|
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int smartfs_finddirentry(FAR struct smartfs_mountpt_s *fs,
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FAR struct smartfs_entry_s *direntry,
|
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FAR const char *relpath,
|
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FAR uint16_t *parentdirsector,
|
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FAR const char **filename)
|
|
{
|
|
int ret = -ENOENT;
|
|
FAR const char *segment;
|
|
FAR const char *ptr;
|
|
uint16_t seglen;
|
|
uint16_t depth = 0;
|
|
uint16_t dirstack[CONFIG_SMARTFS_DIRDEPTH];
|
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uint16_t dirsector;
|
|
uint16_t entrysize;
|
|
uint16_t offset;
|
|
FAR struct smartfs_chain_header_s *header;
|
|
struct smart_read_write_s readwrite;
|
|
FAR struct smartfs_entry_header_s *entry;
|
|
|
|
/* Set the initial value of the output */
|
|
|
|
*parentdirsector = 0xffff;
|
|
*filename = NULL;
|
|
|
|
/* Initialize directory level zero as the root sector */
|
|
|
|
dirstack[0] = fs->fs_rootsector;
|
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entrysize = sizeof(struct smartfs_entry_header_s) +
|
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fs->fs_llformat.namesize;
|
|
|
|
/* Test if this is a request for the root directory */
|
|
|
|
if (*relpath == '\0')
|
|
{
|
|
direntry->firstsector = fs->fs_rootsector;
|
|
direntry->flags = SMARTFS_DIRENT_TYPE_DIR | 0777;
|
|
direntry->utc = 0;
|
|
direntry->dsector = 0;
|
|
direntry->doffset = 0;
|
|
direntry->dfirst = fs->fs_rootsector;
|
|
direntry->name = NULL;
|
|
direntry->datlen = 0;
|
|
|
|
*parentdirsector = 0; /* Our parent is the format sector I guess */
|
|
return OK;
|
|
}
|
|
|
|
/* Parse through each segment of relpath */
|
|
|
|
segment = relpath;
|
|
while (segment != NULL && *segment != '\0')
|
|
{
|
|
/* Find the end of this segment. It will be '/' or NULL. */
|
|
|
|
ptr = segment;
|
|
seglen = 0;
|
|
while (*ptr != '/' && *ptr != '\0')
|
|
{
|
|
seglen++;
|
|
ptr++;
|
|
}
|
|
|
|
/* Check to avoid buffer overflow */
|
|
|
|
if (seglen >= WORKBUFFER_SIZE)
|
|
{
|
|
ret = -ENAMETOOLONG;
|
|
goto errout;
|
|
}
|
|
|
|
strlcpy(fs->fs_workbuffer, segment, seglen + 1);
|
|
|
|
/* Search for "." and ".." as segment names */
|
|
|
|
if (strcmp(fs->fs_workbuffer, ".") == 0)
|
|
{
|
|
/* Just ignore this segment. Advance ptr if not on NULL */
|
|
|
|
if (*ptr == '/')
|
|
{
|
|
ptr++;
|
|
}
|
|
|
|
segment = ptr;
|
|
continue;
|
|
}
|
|
else if (strcmp(fs->fs_workbuffer, "..") == 0)
|
|
{
|
|
/* Up one level */
|
|
|
|
if (depth == 0)
|
|
{
|
|
/* We went up one level past our mount point! */
|
|
|
|
goto errout;
|
|
}
|
|
|
|
/* "Pop" to the previous directory level */
|
|
|
|
depth--;
|
|
if (*ptr == '/')
|
|
{
|
|
ptr++;
|
|
}
|
|
|
|
segment = ptr;
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
/* Search for the entry in the current directory */
|
|
|
|
dirsector = dirstack[depth];
|
|
|
|
/* Read the directory */
|
|
|
|
offset = 0xffff;
|
|
|
|
#if CONFIG_SMARTFS_ERASEDSTATE == 0xff
|
|
while (dirsector != 0xffff)
|
|
#else
|
|
while (dirsector != 0)
|
|
#endif
|
|
{
|
|
/* Read the next directory in the chain */
|
|
|
|
readwrite.logsector = dirsector;
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
readwrite.buffer = (uint8_t *)fs->fs_rwbuffer;
|
|
readwrite.offset = 0;
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
goto errout;
|
|
}
|
|
|
|
/* Point to next sector in chain */
|
|
|
|
header = (FAR struct smartfs_chain_header_s *) fs->fs_rwbuffer;
|
|
dirsector = SMARTFS_NEXTSECTOR(header);
|
|
|
|
/* Search for the entry */
|
|
|
|
offset = sizeof(struct smartfs_chain_header_s);
|
|
entry = (struct smartfs_entry_header_s *)
|
|
&fs->fs_rwbuffer[offset];
|
|
while (offset < readwrite.count)
|
|
{
|
|
/* Test if this entry is valid and active */
|
|
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
if (((smartfs_rdle16(&entry->flags) &
|
|
SMARTFS_DIRENT_EMPTY) ==
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_EMPTY)) ||
|
|
((smartfs_rdle16(&entry->flags)
|
|
& SMARTFS_DIRENT_ACTIVE) !=
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_ACTIVE)))
|
|
#else
|
|
if (((entry->flags & SMARTFS_DIRENT_EMPTY) ==
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_EMPTY)) ||
|
|
((entry->flags & SMARTFS_DIRENT_ACTIVE) !=
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_ACTIVE)))
|
|
#endif
|
|
{
|
|
/* This entry isn't valid, skip it */
|
|
|
|
offset += entrysize;
|
|
entry = (struct smartfs_entry_header_s *)
|
|
&fs->fs_rwbuffer[offset];
|
|
|
|
continue;
|
|
}
|
|
|
|
/* Test if the name matches */
|
|
|
|
if (strncmp(entry->name, fs->fs_workbuffer,
|
|
fs->fs_llformat.namesize) == 0)
|
|
{
|
|
/* We found it! If this is the last segment entry,
|
|
* then report the entry. If it isn't the last
|
|
* entry, then validate it is a directory entry and
|
|
* open it and continue searching.
|
|
*/
|
|
|
|
if (*ptr == '\0')
|
|
{
|
|
/* We are at the last segment. Report the entry */
|
|
|
|
/* Fill in the entry */
|
|
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
direntry->firstsector =
|
|
smartfs_rdle16(&entry->firstsector);
|
|
direntry->flags = smartfs_rdle16(&entry->flags);
|
|
direntry->utc = smartfs_rdle32(&entry->utc);
|
|
#else
|
|
direntry->firstsector = entry->firstsector;
|
|
direntry->flags = entry->flags;
|
|
direntry->utc = entry->utc;
|
|
#endif
|
|
direntry->dsector = readwrite.logsector;
|
|
direntry->doffset = offset;
|
|
direntry->dfirst = dirstack[depth];
|
|
if (direntry->name == NULL)
|
|
{
|
|
direntry->name = (FAR char *)
|
|
kmm_malloc(fs->fs_llformat.namesize + 1);
|
|
}
|
|
|
|
strlcpy(direntry->name, entry->name,
|
|
fs->fs_llformat.namesize + 1);
|
|
direntry->datlen = 0;
|
|
|
|
/* Scan the file's sectors to calculate the length
|
|
* and perform a rudimentary check.
|
|
*/
|
|
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
if ((smartfs_rdle16(&entry->flags) &
|
|
SMARTFS_DIRENT_TYPE) ==
|
|
SMARTFS_DIRENT_TYPE_FILE)
|
|
#else
|
|
if ((entry->flags & SMARTFS_DIRENT_TYPE) ==
|
|
SMARTFS_DIRENT_TYPE_FILE)
|
|
#endif
|
|
{
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
dirsector =
|
|
smartfs_rdle16(&entry->firstsector);
|
|
#else
|
|
dirsector = entry->firstsector;
|
|
#endif
|
|
readwrite.count =
|
|
sizeof(struct smartfs_chain_header_s);
|
|
readwrite.buffer = (uint8_t *)fs->fs_rwbuffer;
|
|
readwrite.offset = 0;
|
|
|
|
while (dirsector != SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
/* Read the next sector of the file */
|
|
|
|
readwrite.logsector = dirsector;
|
|
ret = FS_IOCTL(fs, BIOC_READSECT,
|
|
(unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error in sector"
|
|
" chain at %d!\n", dirsector);
|
|
break;
|
|
}
|
|
|
|
/* Add used bytes to the total and point
|
|
* to next sector
|
|
*/
|
|
|
|
if (SMARTFS_USED(header) !=
|
|
SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
direntry->datlen +=
|
|
SMARTFS_USED(header);
|
|
}
|
|
|
|
dirsector = SMARTFS_NEXTSECTOR(header);
|
|
}
|
|
}
|
|
|
|
*parentdirsector = dirstack[depth];
|
|
*filename = segment;
|
|
ret = OK;
|
|
goto errout;
|
|
}
|
|
else
|
|
{
|
|
/* Validate it's a directory */
|
|
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
if ((smartfs_rdle16(&entry->flags) &
|
|
SMARTFS_DIRENT_TYPE) !=
|
|
SMARTFS_DIRENT_TYPE_DIR)
|
|
#else
|
|
if ((entry->flags & SMARTFS_DIRENT_TYPE) !=
|
|
SMARTFS_DIRENT_TYPE_DIR)
|
|
#endif
|
|
{
|
|
/* Not a directory! Report the error */
|
|
|
|
ret = -ENOTDIR;
|
|
goto errout;
|
|
}
|
|
|
|
/* "Push" the directory and continue searching */
|
|
|
|
if (depth >= CONFIG_SMARTFS_DIRDEPTH - 1)
|
|
{
|
|
/* Directory depth too big */
|
|
|
|
ret = -ENAMETOOLONG;
|
|
goto errout;
|
|
}
|
|
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
dirstack[++depth] =
|
|
smartfs_rdle16(&entry->firstsector);
|
|
#else
|
|
dirstack[++depth] = entry->firstsector;
|
|
#endif
|
|
segment = ptr + 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Not this entry. Skip to the next one */
|
|
|
|
offset += entrysize;
|
|
entry = (struct smartfs_entry_header_s *)
|
|
&fs->fs_rwbuffer[offset];
|
|
}
|
|
|
|
/* Test if a directory entry was found and break if it was */
|
|
|
|
if (offset < readwrite.count)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If we found a dir entry, then continue searching */
|
|
|
|
if (offset < readwrite.count)
|
|
{
|
|
/* Update the segment pointer */
|
|
|
|
if (*ptr != '\0')
|
|
{
|
|
ptr++;
|
|
}
|
|
|
|
segment = ptr;
|
|
continue;
|
|
}
|
|
|
|
/* Entry not found! Report the error. Also, if this is the last
|
|
* segment, then report the parent directory sector.
|
|
*/
|
|
|
|
if (*ptr == '\0')
|
|
{
|
|
*parentdirsector = dirstack[depth];
|
|
*filename = segment;
|
|
}
|
|
else
|
|
{
|
|
*parentdirsector = 0xffff;
|
|
*filename = NULL;
|
|
}
|
|
|
|
ret = -ENOENT;
|
|
goto errout;
|
|
}
|
|
}
|
|
|
|
errout:
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: smartfs_createentry
|
|
*
|
|
* Description: Creates a new entry in the specified parent directory, using
|
|
* the specified type and name. If the given sectorno is
|
|
* 0xffff, then a new sector is allocated for the new entry,
|
|
* otherwise the supplied sectorno is used.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int smartfs_createentry(FAR struct smartfs_mountpt_s *fs,
|
|
uint16_t parentdirsector,
|
|
FAR const char *filename,
|
|
uint16_t type, mode_t mode,
|
|
FAR struct smartfs_entry_s *direntry,
|
|
uint16_t sectorno,
|
|
FAR struct smartfs_ofile_s *sf)
|
|
{
|
|
struct smart_read_write_s readwrite;
|
|
int ret;
|
|
uint16_t psector;
|
|
uint16_t nextsector;
|
|
uint16_t offset;
|
|
bool found = false;
|
|
uint16_t entrysize;
|
|
FAR struct smartfs_entry_header_s *entry;
|
|
FAR struct smartfs_chain_header_s *chainheader;
|
|
struct smart_read_write_s update_readwrite;
|
|
struct smartfs_chain_header_s update_header;
|
|
int update_chain = 0;
|
|
|
|
/* Start at the 1st sector in the parent directory */
|
|
|
|
psector = parentdirsector;
|
|
entrysize = sizeof(struct smartfs_entry_header_s) +
|
|
fs->fs_llformat.namesize;
|
|
|
|
/* Validate the name isn't too long */
|
|
|
|
if (strlen(filename) > fs->fs_llformat.namesize)
|
|
{
|
|
return -ENAMETOOLONG;
|
|
}
|
|
|
|
/* Read the parent directory sector and find a place to insert
|
|
* the new entry.
|
|
*/
|
|
|
|
while (1)
|
|
{
|
|
/* Read the next sector */
|
|
|
|
readwrite.logsector = psector;
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
readwrite.offset = 0;
|
|
readwrite.buffer = (FAR uint8_t *)fs->fs_rwbuffer;
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long)&readwrite);
|
|
if (ret < 0)
|
|
{
|
|
goto errout;
|
|
}
|
|
|
|
/* Get the next chained sector */
|
|
|
|
chainheader = (FAR struct smartfs_chain_header_s *)fs->fs_rwbuffer;
|
|
nextsector = SMARTFS_NEXTSECTOR(chainheader);
|
|
|
|
/* Search for an empty entry in this sector */
|
|
|
|
offset = sizeof(struct smartfs_chain_header_s);
|
|
entry = (struct smartfs_entry_header_s *) &fs->fs_rwbuffer[offset];
|
|
while (offset + entrysize < readwrite.count)
|
|
{
|
|
/* Check if this entry is available */
|
|
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
if ((smartfs_rdle16(&entry->flags) == SMARTFS_ERASEDSTATE_16BIT) ||
|
|
((smartfs_rdle16(&entry->flags) &
|
|
#else
|
|
if ((entry->flags == SMARTFS_ERASEDSTATE_16BIT) ||
|
|
((entry->flags &
|
|
#endif
|
|
(SMARTFS_DIRENT_EMPTY | SMARTFS_DIRENT_ACTIVE)) ==
|
|
(~SMARTFS_ERASEDSTATE_16BIT &
|
|
(SMARTFS_DIRENT_EMPTY | SMARTFS_DIRENT_ACTIVE))))
|
|
{
|
|
/* We found an empty entry. Use it. */
|
|
|
|
found = true;
|
|
break;
|
|
}
|
|
|
|
/* Not available. Skip to next entry */
|
|
|
|
offset += entrysize;
|
|
entry = (FAR struct smartfs_entry_header_s *)
|
|
&fs->fs_rwbuffer[offset];
|
|
}
|
|
|
|
/* If we found an entry, stop the search */
|
|
|
|
if (found)
|
|
{
|
|
break;
|
|
}
|
|
|
|
/* If there are no more sectors, then we need to add one to make
|
|
* room for the new entry.
|
|
*/
|
|
|
|
if (nextsector == SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
/* Allocate a new sector and chain it to the last one */
|
|
|
|
ret = FS_IOCTL(fs, BIOC_ALLOCSECT, 0xffff);
|
|
if (ret < 0)
|
|
{
|
|
goto errout;
|
|
}
|
|
|
|
nextsector = (uint16_t) ret;
|
|
|
|
/* Chain the next sector into this sector. */
|
|
|
|
*((FAR uint16_t *)update_header.nextsector) = nextsector;
|
|
update_readwrite.logsector = psector;
|
|
update_readwrite.offset = offsetof(struct smartfs_chain_header_s,
|
|
nextsector);
|
|
update_readwrite.count = sizeof(uint16_t);
|
|
update_readwrite.buffer = update_header.nextsector;
|
|
update_chain = 1;
|
|
}
|
|
|
|
/* Now update to the next sector */
|
|
|
|
psector = nextsector;
|
|
}
|
|
|
|
/* We found an insertion point. Create the entry at sector,offset */
|
|
|
|
#if CONFIG_SMARTFS_ERASEDSTATE == 0xff
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
smartfs_wrle16(&entry->flags, (uint16_t) (SMARTFS_DIRENT_ACTIVE |
|
|
SMARTFS_DIRENT_DELETING | SMARTFS_DIRENT_RESERVED | type | (mode &
|
|
SMARTFS_DIRENT_MODE)));
|
|
#else
|
|
entry->flags = (uint16_t) (SMARTFS_DIRENT_ACTIVE |
|
|
SMARTFS_DIRENT_DELETING | SMARTFS_DIRENT_RESERVED | type | (mode &
|
|
SMARTFS_DIRENT_MODE));
|
|
#endif
|
|
#else /* CONFIG_SMARTFS_ERASEDSTATE == 0xff */
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
smartfs_wrle16(&entry->flags, (uint16_t) (SMARTFS_DIRENT_EMPTY | type |
|
|
(mode & SMARTFS_DIRENT_MODE)));
|
|
#else
|
|
entry->flags = (uint16_t) (SMARTFS_DIRENT_EMPTY | type |
|
|
(mode & SMARTFS_DIRENT_MODE));
|
|
#endif
|
|
#endif /* CONFIG_SMARTFS_ERASEDSTATE == 0xff */
|
|
|
|
if (sectorno == 0xffff)
|
|
{
|
|
/* Allocate a new sector for the file / dir */
|
|
|
|
ret = FS_IOCTL(fs, BIOC_ALLOCSECT, 0xffff);
|
|
if (ret < 0)
|
|
{
|
|
goto errout;
|
|
}
|
|
|
|
nextsector = (uint16_t)ret;
|
|
|
|
/* Set the newly allocated sector's type (file or dir) */
|
|
|
|
#ifdef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
if (sf)
|
|
{
|
|
/* Using sector buffer and we have an open file context.
|
|
* Just update the sector buffer in the open file context.
|
|
*/
|
|
|
|
memset(sf->buffer, CONFIG_SMARTFS_ERASEDSTATE,
|
|
fs->fs_llformat.availbytes);
|
|
chainheader = (FAR struct smartfs_chain_header_s *)sf->buffer;
|
|
chainheader->type = SMARTFS_SECTOR_TYPE_FILE;
|
|
sf->bflags = SMARTFS_BFLAG_DIRTY | SMARTFS_BFLAG_NEWALLOC;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
if ((type & SMARTFS_DIRENT_TYPE) == SMARTFS_DIRENT_TYPE_DIR)
|
|
{
|
|
chainheader->type = SMARTFS_SECTOR_TYPE_DIR;
|
|
}
|
|
else
|
|
{
|
|
chainheader->type = SMARTFS_SECTOR_TYPE_FILE;
|
|
}
|
|
|
|
readwrite.count = 1;
|
|
readwrite.offset = offsetof(struct smartfs_chain_header_s, type);
|
|
readwrite.buffer = (uint8_t *) &chainheader->type;
|
|
readwrite.logsector = nextsector;
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long)&readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d setting new sector type for sector %d\n",
|
|
ret, nextsector);
|
|
goto errout;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Use the provided sector number */
|
|
|
|
nextsector = sectorno;
|
|
}
|
|
|
|
/* Create the directory entry to be written in the parent's sector */
|
|
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
smartfs_wrle16(&entry->firstsector, nextsector);
|
|
smartfs_wrle16(&entry->utc, time(NULL));
|
|
#else
|
|
entry->firstsector = nextsector;
|
|
entry->utc = time(NULL);
|
|
#endif
|
|
memset(entry->name, 0, fs->fs_llformat.namesize);
|
|
strlcpy(entry->name, filename, fs->fs_llformat.namesize);
|
|
|
|
/* Now write the new entry to the parent directory sector */
|
|
|
|
readwrite.logsector = psector;
|
|
readwrite.offset = offset;
|
|
readwrite.count = entrysize;
|
|
readwrite.buffer = (uint8_t *) &fs->fs_rwbuffer[offset];
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
goto errout;
|
|
}
|
|
|
|
if (update_chain)
|
|
{
|
|
/* Update chain header after the next sector was written */
|
|
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &update_readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error chaining sector %d\n",
|
|
update_readwrite.logsector);
|
|
goto errout;
|
|
}
|
|
}
|
|
|
|
/* Now fill in the entry */
|
|
|
|
direntry->firstsector = nextsector;
|
|
direntry->dsector = psector;
|
|
direntry->doffset = offset;
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
direntry->flags = smartfs_rdle16(&entry->flags);
|
|
direntry->utc = smartfs_rdle32(&entry->utc);
|
|
#else
|
|
direntry->flags = entry->flags;
|
|
direntry->utc = entry->utc;
|
|
#endif
|
|
direntry->datlen = 0;
|
|
if (direntry->name == NULL)
|
|
{
|
|
direntry->name = kmm_malloc(fs->fs_llformat.namesize + 1);
|
|
}
|
|
|
|
memset(direntry->name, 0, fs->fs_llformat.namesize + 1);
|
|
strlcpy(direntry->name, filename, fs->fs_llformat.namesize);
|
|
|
|
ret = OK;
|
|
|
|
errout:
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: smartfs_deleteentry
|
|
*
|
|
* Description: Deletes an entry from the filesystem (file or dir) by
|
|
* freeing all the entry's sectors and then marking it inactive
|
|
* in it's parent's directory sector. For a directory, it
|
|
* does not validate the directory is empty, nor does it do
|
|
* a recursive delete.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int smartfs_deleteentry(FAR struct smartfs_mountpt_s *fs,
|
|
FAR struct smartfs_entry_s *entry)
|
|
{
|
|
int ret;
|
|
uint16_t nextsector;
|
|
uint16_t sector;
|
|
uint16_t count;
|
|
uint16_t entrysize;
|
|
uint16_t offset;
|
|
FAR struct smartfs_entry_header_s *direntry;
|
|
FAR struct smartfs_chain_header_s *header;
|
|
struct smart_read_write_s readwrite;
|
|
|
|
/* Okay, delete the file. Loop through each sector and release them
|
|
*
|
|
* TODO: We really should walk the list backward to avoid lost
|
|
* sectors in the event we lose power. However this requires
|
|
* allocating a buffer to build the sector list since we don't
|
|
* store a doubly-linked list of sectors on the device. We
|
|
* could test if the sector data buffer is big enough and
|
|
* just use that, and only allocate a new buffer if the
|
|
* sector buffer isn't big enough. Do do this, however, we
|
|
* need to change the code below as it is using the a few
|
|
* bytes of the buffer to read in header info.
|
|
*/
|
|
|
|
nextsector = entry->firstsector;
|
|
header = (FAR struct smartfs_chain_header_s *) fs->fs_rwbuffer;
|
|
readwrite.offset = 0;
|
|
readwrite.count = sizeof(struct smartfs_chain_header_s);
|
|
readwrite.buffer = (uint8_t *) fs->fs_rwbuffer;
|
|
while (nextsector != SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
/* Read the next sector into our buffer */
|
|
|
|
sector = nextsector;
|
|
readwrite.logsector = sector;
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error reading sector %d\n", nextsector);
|
|
break;
|
|
}
|
|
|
|
/* Release this sector */
|
|
|
|
nextsector = SMARTFS_NEXTSECTOR(header);
|
|
ret = FS_IOCTL(fs, BIOC_FREESECT, sector);
|
|
}
|
|
|
|
/* Remove the entry from the directory tree */
|
|
|
|
readwrite.logsector = entry->dsector;
|
|
readwrite.offset = 0;
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
readwrite.buffer = (uint8_t *) fs->fs_rwbuffer;
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error reading directory info at sector %d\n",
|
|
entry->dsector);
|
|
goto errout;
|
|
}
|
|
|
|
/* Mark this entry as inactive */
|
|
|
|
direntry = (struct smartfs_entry_header_s *)
|
|
&fs->fs_rwbuffer[entry->doffset];
|
|
#if CONFIG_SMARTFS_ERASEDSTATE == 0xff
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
smartfs_wrle16(&direntry->flags,
|
|
smartfs_rdle16(&direntry->flags) & ~SMARTFS_DIRENT_ACTIVE);
|
|
#else
|
|
direntry->flags &= ~SMARTFS_DIRENT_ACTIVE;
|
|
#endif
|
|
#else /* CONFIG_SMARTFS_ERASEDSTATE == 0xff */
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
smartfs_wrle16(&direntry->flags,
|
|
smartfs_rdle16(&direntry->flags) | SMARTFS_DIRENT_ACTIVE);
|
|
#else
|
|
direntry->flags |= SMARTFS_DIRENT_ACTIVE;
|
|
#endif
|
|
#endif /* CONFIG_SMARTFS_ERASEDSTATE == 0xff */
|
|
|
|
/* Write the updated flags back to the sector */
|
|
|
|
readwrite.offset = entry->doffset;
|
|
readwrite.count = sizeof(uint16_t);
|
|
readwrite.buffer = (uint8_t *) &direntry->flags;
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error marking entry inactive at sector %d\n",
|
|
entry->dsector);
|
|
goto errout;
|
|
}
|
|
|
|
/* Test if any entries in this sector are being used */
|
|
|
|
if ((entry->dsector != fs->fs_rootsector) &&
|
|
(entry->dsector != entry->dfirst))
|
|
{
|
|
/* Scan the sector and count used entries */
|
|
|
|
count = 0;
|
|
offset = sizeof(struct smartfs_chain_header_s);
|
|
entrysize = sizeof(struct smartfs_entry_header_s) +
|
|
fs->fs_llformat.namesize;
|
|
while (offset + entrysize < fs->fs_llformat.availbytes)
|
|
{
|
|
/* Test the next entry */
|
|
|
|
direntry = (struct smartfs_entry_header_s *)
|
|
&fs->fs_rwbuffer[offset];
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
if (((smartfs_rdle16(&direntry->flags) & SMARTFS_DIRENT_EMPTY) !=
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_EMPTY)) &&
|
|
((smartfs_rdle16(&direntry->flags) & SMARTFS_DIRENT_ACTIVE) ==
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_ACTIVE)))
|
|
#else
|
|
if (((direntry->flags & SMARTFS_DIRENT_EMPTY) !=
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_EMPTY)) &&
|
|
((direntry->flags & SMARTFS_DIRENT_ACTIVE) ==
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_ACTIVE)))
|
|
#endif
|
|
{
|
|
/* Count this entry */
|
|
|
|
count++;
|
|
}
|
|
|
|
/* Advance to next entry */
|
|
|
|
offset += entrysize;
|
|
}
|
|
|
|
/* Test if the count it zero.
|
|
* If it is, then we will release the sector
|
|
*/
|
|
|
|
if (count == 0)
|
|
{
|
|
/* Okay, to release the sector, we must find the sector that we
|
|
* are chained to and remove ourselves from the chain. First
|
|
* save our nextsector value so we can "unchain" ourselves.
|
|
*/
|
|
|
|
nextsector = SMARTFS_NEXTSECTOR(header);
|
|
|
|
/* Now loop through the dir sectors to find ourselves in the
|
|
* chain
|
|
*/
|
|
|
|
sector = entry->dfirst;
|
|
readwrite.offset = 0;
|
|
readwrite.count = sizeof(struct smartfs_chain_header_s);
|
|
readwrite.buffer = (uint8_t *) fs->fs_rwbuffer;
|
|
while (sector != SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
/* Read the header for the next sector */
|
|
|
|
readwrite.logsector = sector;
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error reading sector %d\n", nextsector);
|
|
break;
|
|
}
|
|
|
|
/* Test if this sector "points" to us */
|
|
|
|
if (SMARTFS_NEXTSECTOR(header) == entry->dsector)
|
|
{
|
|
/* We found ourselves in the chain. Update the chain. */
|
|
|
|
SMARTFS_SET_NEXTSECTOR(header, nextsector);
|
|
readwrite.offset = offsetof(struct smartfs_chain_header_s,
|
|
nextsector);
|
|
readwrite.count = sizeof(uint16_t);
|
|
readwrite.buffer = header->nextsector;
|
|
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT,
|
|
(unsigned long)&readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error unchaining sector (%d)\n",
|
|
nextsector);
|
|
goto errout;
|
|
}
|
|
|
|
/* Now release our sector */
|
|
|
|
ret = FS_IOCTL(fs, BIOC_FREESECT,
|
|
(unsigned long)entry->dsector);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error freeing sector %d\n",
|
|
entry->dsector);
|
|
goto errout;
|
|
}
|
|
|
|
/* Break out of the loop, we are done! */
|
|
|
|
break;
|
|
}
|
|
|
|
/* Chain to the next sector */
|
|
|
|
sector = SMARTFS_NEXTSECTOR(header);
|
|
}
|
|
}
|
|
}
|
|
|
|
ret = OK;
|
|
|
|
errout:
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: smartfs_countdirentries
|
|
*
|
|
* Description: Counts the number of items in the specified directory entry.
|
|
* This routine assumes you have validated the entry you are
|
|
* passing is in fact a directory sector, though it checks
|
|
* just in case you were stupid :-)
|
|
*
|
|
****************************************************************************/
|
|
|
|
int smartfs_countdirentries(FAR struct smartfs_mountpt_s *fs,
|
|
FAR struct smartfs_entry_s *entry)
|
|
{
|
|
int ret;
|
|
uint16_t nextsector;
|
|
uint16_t offset;
|
|
uint16_t entrysize;
|
|
int count;
|
|
FAR struct smartfs_entry_header_s *direntry;
|
|
FAR struct smartfs_chain_header_s *header;
|
|
struct smart_read_write_s readwrite;
|
|
|
|
/* Walk through the directory's sectors and count entries */
|
|
|
|
count = 0;
|
|
nextsector = entry->firstsector;
|
|
while (nextsector != SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
/* Read the next sector into our buffer */
|
|
|
|
readwrite.logsector = nextsector;
|
|
readwrite.offset = 0;
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
readwrite.buffer = (uint8_t *) fs->fs_rwbuffer;
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error reading sector %d\n", nextsector);
|
|
break;
|
|
}
|
|
|
|
/* Validate this is a directory type sector */
|
|
|
|
header = (FAR struct smartfs_chain_header_s *) fs->fs_rwbuffer;
|
|
if (header->type != SMARTFS_SECTOR_TYPE_DIR)
|
|
{
|
|
ferr("ERROR: Sector %d is not a DIR sector!\n", nextsector);
|
|
goto errout;
|
|
}
|
|
|
|
/* Loop for all entries in this sector and count them */
|
|
|
|
offset = sizeof(struct smartfs_chain_header_s);
|
|
entrysize = sizeof(struct smartfs_entry_header_s) +
|
|
fs->fs_llformat.namesize;
|
|
direntry = (struct smartfs_entry_header_s *) &fs->fs_rwbuffer[offset];
|
|
while (offset + entrysize < readwrite.count)
|
|
{
|
|
#ifdef CONFIG_SMARTFS_ALIGNED_ACCESS
|
|
if (((smartfs_rdle16(&direntry->flags) & SMARTFS_DIRENT_EMPTY) !=
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_EMPTY)) &&
|
|
((smartfs_rdle16(&direntry->flags) & SMARTFS_DIRENT_ACTIVE) ==
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_ACTIVE)))
|
|
#else
|
|
if (((direntry->flags & SMARTFS_DIRENT_EMPTY) !=
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_EMPTY)) &&
|
|
((direntry->flags & SMARTFS_DIRENT_ACTIVE) ==
|
|
(SMARTFS_ERASEDSTATE_16BIT & SMARTFS_DIRENT_ACTIVE)))
|
|
#endif
|
|
{
|
|
/* Count this entry */
|
|
|
|
count++;
|
|
}
|
|
|
|
offset += entrysize;
|
|
direntry = (struct smartfs_entry_header_s *)
|
|
&fs->fs_rwbuffer[offset];
|
|
}
|
|
|
|
/* Get the next sector from the header */
|
|
|
|
nextsector = SMARTFS_NEXTSECTOR(header);
|
|
}
|
|
|
|
ret = count;
|
|
|
|
errout:
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: smartfs_sync_internal
|
|
*
|
|
* Description:
|
|
* Synchronize the file state on disk to match internal, in-memory state.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int smartfs_sync_internal(FAR struct smartfs_mountpt_s *fs,
|
|
FAR struct smartfs_ofile_s *sf)
|
|
{
|
|
FAR struct smartfs_chain_header_s *header;
|
|
struct smart_read_write_s readwrite;
|
|
int ret = OK;
|
|
|
|
#ifdef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
if (sf->bflags & SMARTFS_BFLAG_DIRTY)
|
|
{
|
|
/* Update the header with the number of bytes written */
|
|
|
|
header = (FAR struct smartfs_chain_header_s *)sf->buffer;
|
|
|
|
if (SMARTFS_USED(header) == SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
SMARTFS_SET_USED(header, sf->byteswritten);
|
|
}
|
|
else
|
|
{
|
|
SMARTFS_SET_USED(header, SMARTFS_USED(header)
|
|
+ sf->byteswritten);
|
|
}
|
|
|
|
/* Write the entire sector to FLASH */
|
|
|
|
readwrite.logsector = sf->currsector;
|
|
readwrite.offset = 0;
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
readwrite.buffer = sf->buffer;
|
|
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d writing used bytes for sector %d\n",
|
|
ret, sf->currsector);
|
|
goto errout;
|
|
}
|
|
|
|
sf->byteswritten = 0;
|
|
sf->bflags = 0;
|
|
}
|
|
#else /* CONFIG_SMARTFS_USE_SECTOR_BUFFER */
|
|
|
|
/* Test if we have written bytes to the current sector that
|
|
* need to be recorded in the chain header's used bytes field.
|
|
*/
|
|
|
|
if (sf->byteswritten > 0)
|
|
{
|
|
finfo("Syncing sector %d\n", sf->currsector);
|
|
|
|
/* Read the existing sector used bytes value */
|
|
|
|
readwrite.logsector = sf->currsector;
|
|
readwrite.offset = 0;
|
|
readwrite.buffer = (uint8_t *) fs->fs_rwbuffer;
|
|
readwrite.count = sizeof(struct smartfs_chain_header_s);
|
|
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d reading sector %d data\n",
|
|
ret, sf->currsector);
|
|
goto errout;
|
|
}
|
|
|
|
/* Add new byteswritten to existing value */
|
|
|
|
header = (FAR struct smartfs_chain_header_s *) fs->fs_rwbuffer;
|
|
|
|
if (SMARTFS_USED(header) == SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
SMARTFS_SET_USED(header, sf->byteswritten);
|
|
}
|
|
else
|
|
{
|
|
SMARTFS_SET_USED(header, SMARTFS_USED(header)
|
|
+ sf->byteswritten);
|
|
}
|
|
|
|
readwrite.offset = offsetof(struct smartfs_chain_header_s, used);
|
|
readwrite.count = sizeof(uint16_t);
|
|
readwrite.buffer = (uint8_t *) &fs->fs_rwbuffer[readwrite.offset];
|
|
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d writing used bytes for sector %d\n",
|
|
ret, sf->currsector);
|
|
goto errout;
|
|
}
|
|
|
|
sf->byteswritten = 0;
|
|
}
|
|
#endif /* CONFIG_SMARTFS_USE_SECTOR_BUFFER */
|
|
|
|
errout:
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: smartfs_seek_internal
|
|
*
|
|
* Description:
|
|
* Performs the logic of the seek function. This is an internal function
|
|
* because it does not provide semaphore protection and therefore must be
|
|
* called from one of the other public interface routines (open, seek,
|
|
* etc.).
|
|
*
|
|
****************************************************************************/
|
|
|
|
off_t smartfs_seek_internal(FAR struct smartfs_mountpt_s *fs,
|
|
FAR struct smartfs_ofile_s *sf,
|
|
off_t offset, int whence)
|
|
{
|
|
FAR struct smartfs_chain_header_s *header;
|
|
struct smart_read_write_s readwrite;
|
|
off_t newpos;
|
|
off_t sectorstartpos;
|
|
int ret;
|
|
|
|
/* Test if this is a seek to get the current file pos */
|
|
|
|
if ((whence == SEEK_CUR) && (offset == 0))
|
|
{
|
|
return sf->filepos;
|
|
}
|
|
|
|
/* Test if we need to sync the file */
|
|
|
|
if (sf->byteswritten > 0)
|
|
{
|
|
/* Perform a sync */
|
|
|
|
smartfs_sync_internal(fs, sf);
|
|
}
|
|
|
|
/* Calculate the file position to seek to based on current position */
|
|
|
|
switch (whence)
|
|
{
|
|
case SEEK_SET:
|
|
default:
|
|
newpos = offset;
|
|
break;
|
|
|
|
case SEEK_CUR:
|
|
newpos = sf->filepos + offset;
|
|
break;
|
|
|
|
case SEEK_END:
|
|
newpos = sf->entry.datlen + offset;
|
|
break;
|
|
}
|
|
|
|
/* Ensure newpos is in range */
|
|
|
|
if (newpos < 0)
|
|
{
|
|
newpos = 0;
|
|
}
|
|
|
|
if (newpos > sf->entry.datlen)
|
|
{
|
|
newpos = sf->entry.datlen;
|
|
}
|
|
|
|
/* Now perform the seek. Test if we are seeking within the current
|
|
* sector and can skip the search to save time.
|
|
*/
|
|
|
|
sectorstartpos = sf->filepos - (sf->curroffset - sizeof(struct
|
|
smartfs_chain_header_s));
|
|
|
|
if (newpos >= sectorstartpos && newpos < sectorstartpos +
|
|
fs->fs_llformat.availbytes - sizeof(struct smartfs_chain_header_s))
|
|
{
|
|
/* Seeking within the current sector. Just update the offset */
|
|
|
|
sf->curroffset = sizeof(struct smartfs_chain_header_s) +
|
|
newpos - sectorstartpos;
|
|
sf->filepos = newpos;
|
|
|
|
return newpos;
|
|
}
|
|
|
|
/* Nope, we have to search for the sector and offset. If the new pos is
|
|
* greater than the current pos, then we can start from the beginning of
|
|
* the current sector, otherwise we have to start from the beginning of
|
|
* the file.
|
|
*/
|
|
|
|
if (newpos > sf->filepos)
|
|
{
|
|
sf->filepos = sectorstartpos;
|
|
}
|
|
else
|
|
{
|
|
sf->currsector = sf->entry.firstsector;
|
|
sf->filepos = 0;
|
|
}
|
|
|
|
header = (FAR struct smartfs_chain_header_s *) fs->fs_rwbuffer;
|
|
while ((sf->currsector != SMARTFS_ERASEDSTATE_16BIT) &&
|
|
(sf->filepos + fs->fs_llformat.availbytes -
|
|
sizeof(struct smartfs_chain_header_s) < newpos))
|
|
{
|
|
/* Read the sector's header */
|
|
|
|
readwrite.logsector = sf->currsector;
|
|
readwrite.offset = 0;
|
|
readwrite.count = sizeof(struct smartfs_chain_header_s);
|
|
readwrite.buffer = (uint8_t *) fs->fs_rwbuffer;
|
|
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d reading sector %d header\n",
|
|
ret, sf->currsector);
|
|
goto errout;
|
|
}
|
|
|
|
/* Point to next sector and update filepos */
|
|
|
|
sf->currsector = SMARTFS_NEXTSECTOR(header);
|
|
sf->filepos += SMARTFS_USED(header);
|
|
}
|
|
|
|
#ifdef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
|
|
/* When using sector buffering, we must read in the last buffer to our
|
|
* sf->buffer in case any changes are made.
|
|
*/
|
|
|
|
if (sf->currsector != SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
readwrite.logsector = sf->currsector;
|
|
readwrite.offset = 0;
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
readwrite.buffer = (uint8_t *) sf->buffer;
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d reading sector %d header\n",
|
|
ret, sf->currsector);
|
|
goto errout;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Now calculate the offset */
|
|
|
|
sf->curroffset = sizeof(struct smartfs_chain_header_s) + newpos -
|
|
sf->filepos;
|
|
sf->filepos = newpos;
|
|
return newpos;
|
|
|
|
errout:
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: smartfs_shrinkfile
|
|
*
|
|
* Description:
|
|
* Shrink the size of an existing file to the specified length
|
|
*
|
|
****************************************************************************/
|
|
|
|
int smartfs_shrinkfile(FAR struct smartfs_mountpt_s *fs,
|
|
FAR struct smartfs_ofile_s *sf, off_t length)
|
|
{
|
|
FAR struct smartfs_chain_header_s *header;
|
|
FAR struct smartfs_entry_s *entry;
|
|
FAR uint8_t *dest;
|
|
struct smart_read_write_s readwrite;
|
|
uint16_t nextsector;
|
|
uint16_t sector;
|
|
off_t remaining;
|
|
off_t destsize;
|
|
off_t available;
|
|
off_t offset;
|
|
int ret;
|
|
|
|
/* Walk through the directory's sectors and count entries */
|
|
|
|
entry = &sf->entry;
|
|
nextsector = entry->firstsector;
|
|
header = (FAR struct smartfs_chain_header_s *)fs->fs_rwbuffer;
|
|
remaining = length;
|
|
available = fs->fs_llformat.availbytes -
|
|
sizeof(struct smartfs_chain_header_s);
|
|
|
|
while (nextsector != SMARTFS_ERASEDSTATE_16BIT)
|
|
{
|
|
/* Read the next sector into our buffer */
|
|
|
|
readwrite.logsector = nextsector;
|
|
readwrite.offset = 0;
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
readwrite.buffer = (FAR uint8_t *)fs->fs_rwbuffer;
|
|
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error reading sector %d header\n", nextsector);
|
|
return ret;
|
|
}
|
|
|
|
/* Get the next chained sector */
|
|
|
|
sector = SMARTFS_NEXTSECTOR(header);
|
|
|
|
#ifdef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
/* When we have a sector buffer in use, simply skip the first sector.
|
|
* It will be handled below.
|
|
*/
|
|
|
|
if (nextsector == entry->firstsector)
|
|
{
|
|
if (remaining > available)
|
|
{
|
|
remaining -= available;
|
|
}
|
|
else
|
|
{
|
|
remaining = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Are we retaining the sector it its entirety? */
|
|
|
|
if (remaining >= available)
|
|
{
|
|
/* Yes... skip to the next sector */
|
|
|
|
remaining -= available;
|
|
}
|
|
|
|
/* Are we removing the sector it its entirety? */
|
|
|
|
else if (remaining <= 0 && nextsector != entry->firstsector)
|
|
{
|
|
/* Yes.. just release the sector */
|
|
|
|
ret = FS_IOCTL(fs, BIOC_FREESECT, (unsigned long)nextsector);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error freeing sector %d\n", nextsector);
|
|
return ret;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* No.. Fill our buffer with erased data, retaining any still-
|
|
* valid bytes at the beginning of the buffer.
|
|
*
|
|
* Because of the preceding tests we know that
|
|
* 0 <= remaining < available. A special case is remaining == 0
|
|
* and nextsector == firstsector. In that case, we need to
|
|
* overwrite the sector data with the erased state value. The
|
|
* underlying SMART block driver will detect this and release the
|
|
* old sector and create a new one with the new (blank) data.
|
|
*
|
|
* Otherwise, we need to preserve the header and overwrite some of
|
|
* the data.
|
|
*/
|
|
|
|
if (remaining == 0)
|
|
{
|
|
dest = (FAR uint8_t *)fs->fs_rwbuffer;
|
|
destsize = fs->fs_llformat.availbytes;
|
|
}
|
|
else
|
|
{
|
|
offset = sizeof(struct smartfs_chain_header_s) + remaining;
|
|
dest = (FAR uint8_t *)&fs->fs_rwbuffer[offset];
|
|
destsize = fs->fs_llformat.availbytes - offset;
|
|
|
|
SMARTFS_SET_USED(header, remaining);
|
|
SMARTFS_SET_NEXTSECTOR(header, SMARTFS_ERASEDSTATE_16BIT);
|
|
remaining = 0;
|
|
}
|
|
|
|
memset(dest, CONFIG_SMARTFS_ERASEDSTATE, destsize);
|
|
header->type = SMARTFS_SECTOR_TYPE_FILE;
|
|
|
|
/* Now write the new sector data */
|
|
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long)&readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error blanking 1st sector (%d) of file\n",
|
|
nextsector);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Now move on to the next sector */
|
|
|
|
nextsector = sector;
|
|
}
|
|
|
|
#ifdef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
/* Now deal with the first sector in the event we are using a sector buffer
|
|
* like we would be if CRC is enabled.
|
|
*
|
|
* Using sector buffer and we have an open file context. Just update the
|
|
* sector buffer in the open file context.
|
|
*/
|
|
|
|
if (length < fs->fs_llformat.availbytes)
|
|
{
|
|
/* Read the entire sector */
|
|
|
|
readwrite.logsector = entry->firstsector;
|
|
readwrite.offset = 0;
|
|
readwrite.count = fs->fs_llformat.availbytes;
|
|
readwrite.buffer = (uint8_t *)sf->buffer;
|
|
|
|
ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long)&readwrite);
|
|
if (ret < 0)
|
|
{
|
|
return ret;
|
|
}
|
|
|
|
/* Retain any valid data at the beginning of the sector, including the
|
|
* header. Special case length == 0
|
|
*/
|
|
|
|
if (length == 0)
|
|
{
|
|
dest = (FAR uint8_t *)sf->buffer;
|
|
destsize = fs->fs_llformat.availbytes;
|
|
}
|
|
else
|
|
{
|
|
offset = sizeof(struct smartfs_chain_header_s) + length;
|
|
dest = (FAR uint8_t *)&sf->buffer[offset];
|
|
destsize = fs->fs_llformat.availbytes - offset;
|
|
|
|
header = (FAR struct smartfs_chain_header_s *)sf->buffer;
|
|
|
|
SMARTFS_SET_USED(header, length);
|
|
SMARTFS_SET_NEXTSECTOR(header, SMARTFS_ERASEDSTATE_16BIT);
|
|
}
|
|
|
|
memset(dest, CONFIG_SMARTFS_ERASEDSTATE, destsize);
|
|
|
|
header = (FAR struct smartfs_chain_header_s *)sf->buffer;
|
|
header->type = SMARTFS_SECTOR_TYPE_FILE;
|
|
sf->bflags = SMARTFS_BFLAG_DIRTY;
|
|
}
|
|
#endif
|
|
|
|
entry->datlen = length;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: smartfs_extendfile
|
|
*
|
|
* Description:
|
|
* Zero-extend the length of a regular file to 'length'.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int smartfs_extendfile(FAR struct smartfs_mountpt_s *fs,
|
|
FAR struct smartfs_ofile_s *sf, off_t length)
|
|
{
|
|
struct smart_read_write_s readwrite;
|
|
FAR struct smartfs_chain_header_s *header;
|
|
#ifndef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
FAR uint8_t *buffer;
|
|
#endif
|
|
off_t remaining;
|
|
off_t savepos;
|
|
off_t oldsize;
|
|
int ret;
|
|
|
|
/* We are zero-extending the file. This is essentially the same as a
|
|
* write except that (1) we write zeros and (2) we don't update the file
|
|
* position.
|
|
*/
|
|
|
|
#ifndef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
/* In order to perform the writes we will have to have a sector buffer. If
|
|
* SmartFS is not configured with a sector buffer then we will, then we
|
|
* will, unfortunately, need to allocate one.
|
|
*/
|
|
|
|
buffer = kmm_malloc(SMARTFS_TRUNCBUFFER_SIZE);
|
|
if (buffer == NULL)
|
|
{
|
|
return -ENOMEM;
|
|
}
|
|
#endif
|
|
|
|
/* Loop until either (1) the file has been fully extended with zeroed data
|
|
* or (2) an error occurs. We assume we start with the current sector in
|
|
* cache (ff_currentsector).
|
|
*/
|
|
|
|
oldsize = sf->entry.datlen;
|
|
remaining = length - oldsize;
|
|
DEBUGASSERT(length > oldsize);
|
|
|
|
/* Seek to the end of the file for the append/write operation, remembering
|
|
* the current file position. It will be restored before returning; the
|
|
* truncate operation must not alter the file position.
|
|
*/
|
|
|
|
savepos = sf->filepos;
|
|
smartfs_seek_internal(fs, sf, 0, SEEK_END);
|
|
|
|
while (remaining > 0)
|
|
{
|
|
/* We will fill up the current sector. Write data to the current
|
|
* sector first.
|
|
*/
|
|
|
|
#ifdef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
readwrite.count = fs->fs_llformat.availbytes - sf->curroffset;
|
|
if (readwrite.count > remaining)
|
|
{
|
|
readwrite.count = remaining;
|
|
}
|
|
|
|
memset(&sf->buffer[sf->curroffset], 0, readwrite.count);
|
|
sf->bflags |= SMARTFS_BFLAG_DIRTY;
|
|
|
|
#else /* CONFIG_SMARTFS_USE_SECTOR_BUFFER */
|
|
readwrite.offset = sf->curroffset;
|
|
readwrite.logsector = sf->currsector;
|
|
readwrite.buffer = buffer;
|
|
|
|
/* Select max size that available in the current sector */
|
|
|
|
readwrite.count = fs->fs_llformat.availbytes - sf->curroffset;
|
|
if (readwrite.count > remaining)
|
|
{
|
|
/* Limit the write to the size for our smaller working buffer */
|
|
|
|
readwrite.count = SMARTFS_TRUNCBUFFER_SIZE;
|
|
}
|
|
|
|
if (readwrite.count > remaining)
|
|
{
|
|
/* Further limit the write to the remaining bytes to write */
|
|
|
|
readwrite.count = remaining;
|
|
}
|
|
|
|
/* Perform the write */
|
|
|
|
if (readwrite.count > 0)
|
|
{
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d writing sector %d data\n",
|
|
ret, sf->currsector);
|
|
goto errout_with_buffer;
|
|
}
|
|
}
|
|
#endif /* CONFIG_SMARTFS_USE_SECTOR_BUFFER */
|
|
|
|
/* Update our control variables */
|
|
|
|
sf->entry.datlen += readwrite.count;
|
|
sf->byteswritten += readwrite.count;
|
|
sf->curroffset += readwrite.count;
|
|
remaining -= readwrite.count;
|
|
|
|
/* Test if we wrote a full sector of data */
|
|
|
|
#ifdef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
if (sf->curroffset == fs->fs_llformat.availbytes && remaining)
|
|
{
|
|
/* First get a new chained sector */
|
|
|
|
ret = FS_IOCTL(fs, BIOC_ALLOCSECT, 0xffff);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d allocating new sector\n", ret);
|
|
goto errout_with_buffer;
|
|
}
|
|
|
|
/* Copy the new sector to the old one and chain it */
|
|
|
|
header = (FAR struct smartfs_chain_header_s *) sf->buffer;
|
|
SMARTFS_SET_NEXTSECTOR(header, ret);
|
|
|
|
/* Now sync the file to write this sector out */
|
|
|
|
ret = smartfs_sync_internal(fs, sf);
|
|
if (ret != OK)
|
|
{
|
|
goto errout_with_buffer;
|
|
}
|
|
|
|
/* Record the new sector in our tracking variables and reset the
|
|
* offset to "zero".
|
|
*/
|
|
|
|
if (sf->currsector == SMARTFS_NEXTSECTOR(header))
|
|
{
|
|
/* Error allocating logical sector! */
|
|
|
|
ferr("ERROR: Duplicate logical sector %d\n", sf->currsector);
|
|
}
|
|
|
|
sf->bflags = SMARTFS_BFLAG_DIRTY;
|
|
sf->currsector = SMARTFS_NEXTSECTOR(header);
|
|
sf->curroffset = sizeof(struct smartfs_chain_header_s);
|
|
memset(sf->buffer, CONFIG_SMARTFS_ERASEDSTATE,
|
|
fs->fs_llformat.availbytes);
|
|
header->type = SMARTFS_DIRENT_TYPE_FILE;
|
|
}
|
|
#else /* CONFIG_SMARTFS_USE_SECTOR_BUFFER */
|
|
|
|
if (sf->curroffset == fs->fs_llformat.availbytes)
|
|
{
|
|
/* Sync the file to write this sector out */
|
|
|
|
ret = smartfs_sync_internal(fs, sf);
|
|
if (ret != OK)
|
|
{
|
|
goto errout_with_buffer;
|
|
}
|
|
|
|
/* Allocate a new sector if needed */
|
|
|
|
if (remaining > 0)
|
|
{
|
|
/* Allocate a new sector */
|
|
|
|
ret = FS_IOCTL(fs, BIOC_ALLOCSECT, 0xffff);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d allocating new sector\n", ret);
|
|
goto errout_with_buffer;
|
|
}
|
|
|
|
/* Copy the new sector to the old one and chain it */
|
|
|
|
header = (FAR struct smartfs_chain_header_s *)fs->fs_rwbuffer;
|
|
SMARTFS_SET_NEXTSECTOR(header, ret);
|
|
|
|
readwrite.offset = offsetof(struct smartfs_chain_header_s,
|
|
nextsector);
|
|
readwrite.buffer = (FAR uint8_t *)header->nextsector;
|
|
readwrite.count = sizeof(uint16_t);
|
|
|
|
ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
|
|
if (ret < 0)
|
|
{
|
|
ferr("ERROR: Error %d writing next sector\n", ret);
|
|
goto errout_with_buffer;
|
|
}
|
|
|
|
/* Record the new sector in our tracking variables and
|
|
* reset the offset to "zero".
|
|
*/
|
|
|
|
if (sf->currsector == SMARTFS_NEXTSECTOR(header))
|
|
{
|
|
/* Error allocating logical sector! */
|
|
|
|
ferr("ERROR: Duplicate logical sector %d\n",
|
|
sf->currsector);
|
|
}
|
|
|
|
sf->currsector = SMARTFS_NEXTSECTOR(header);
|
|
sf->curroffset = sizeof(struct smartfs_chain_header_s);
|
|
}
|
|
}
|
|
#endif /* CONFIG_SMARTFS_USE_SECTOR_BUFFER */
|
|
}
|
|
|
|
/* The file was successfully extended with zeros */
|
|
|
|
ret = OK;
|
|
|
|
errout_with_buffer:
|
|
#ifndef CONFIG_SMARTFS_USE_SECTOR_BUFFER
|
|
/* Release the allocated buffer */
|
|
|
|
kmm_free(buffer);
|
|
#endif
|
|
/* Restore the original file position */
|
|
|
|
smartfs_seek_internal(fs, sf, savepos, SEEK_SET);
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: smartfs_get_first_mount
|
|
*
|
|
* Description: Returns a pointer to the first mounted smartfs volume.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_SMARTFS)
|
|
FAR struct smartfs_mountpt_s *smartfs_get_first_mount(void)
|
|
{
|
|
return g_mounthead;
|
|
}
|
|
#endif
|