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/**************************************************************************
*
* Copyright (c) 2013 Alcatel-Lucent
*
* Alcatel Lucent licenses this file to You under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. A copy of the License is contained the
* file LICENSE at the top level of this repository.
* You may also obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**************************************************************************
*
* tfsclean2.c:
*
* This version of defragmentation is not power-hit safe and does not
* require any flash overhead. The defragmentation simply copies all
* good files to an allocated block of ram erases the flash, then copies
* the concatenated data back to the flash. Simple but dangerous.
*
* If automatic defragmentation (through tfsadd()) is to be used in this
* mode, then the application must reside in ram space that is above
* APPRAMSTART + SIZEOF_TFSFLASH. This version of defragmentation assumes
* that the ram space needed for defrag will start at APPRAMBASE.
*
* Original author: Ed Sutter (ed.sutter@alcatel-lucent.com)
*
*/
#include "config.h"
#include "cpu.h"
#include "stddefs.h"
#include "genlib.h"
#include "tfs.h"
#include "tfsprivate.h"
#include "flash.h"
#include "monflags.h"
#if INCLUDE_TFS
int
tfsfixup(int verbose, int dontquery)
{
return(TFSERR_NOTAVAILABLE);
}
#if DEFRAG_TEST_ENABLED
int
dumpDhdr(DEFRAGHDR *dhp)
{
return(TFSERR_NOTAVAILABLE);
}
int
dumpDhdrTbl(DEFRAGHDR *dhp, int ftot)
{
return(TFSERR_NOTAVAILABLE);
}
#endif
/* _tfsclean():
* This is an alternative to the complicated defragmentation above.
* It simply scans through the file list and copies all valid files
* to RAM; then flash is erased and the RAM is copied back to flash.
* <<< WARNING >>>
* THIS FUNCTION SHOULD NOT BE INTERRUPTED AND IT WILL BLOW AWAY
* ANY APPLICATION CURRENTLY IN CLIENT RAM SPACE.
*/
int
_tfsclean(TDEV *tdp, int notused, int verbose)
{
TFILE *tfp;
ulong appramstart;
uchar *tbuf, *cp1, *cp2;
int dtot, nfadd, len, chkstat;
#if INCLUDE_FLASH
TFILE *lasttfp;
#endif
if (TfsCleanEnable < 0)
return(TFSERR_CLEANOFF);
appramstart = getAppRamStart();
/* Determine how many "dead" files exist. */
dtot = 0;
tfp = (TFILE *)tdp->start;
while(validtfshdr(tfp)) {
if (!TFS_FILEEXISTS(tfp))
dtot++;
tfp = nextfp(tfp,tdp);
}
if (dtot == 0)
return(TFS_OKAY);
printf("TFS device '%s' non-powersafe defragmentation\n",tdp->prefix);
tbuf = (uchar *)appramstart;
tfp = (TFILE *)(tdp->start);
#if INCLUDE_FLASH
lasttfp = tfp;
#endif
nfadd = tdp->start;
while(validtfshdr(tfp)) {
if (TFS_FILEEXISTS(tfp)) {
len = TFS_SIZE(tfp) + sizeof(struct tfshdr);
if (len % TFS_FSIZEMOD)
len += TFS_FSIZEMOD - (len % TFS_FSIZEMOD);
nfadd += len;
if (s_memcpy((char *)tbuf,(char *)tfp,len,0,0) != 0)
return(TFSERR_MEMFAIL);
((struct tfshdr *)tbuf)->next = (struct tfshdr *)nfadd;
tbuf += len;
}
#if INCLUDE_FLASH
lasttfp = tfp;
#endif
tfp = nextfp(tfp,tdp);
}
/* We've now copied all of the active files from flash to ram.
* Now we want to see how much of the flash space needs to be
* erased. We only need to erase the sectors that have changed...
*/
cp1 = (uchar *)tdp->start;
cp2 = (uchar *)appramstart;
while(cp2 < tbuf) {
if (*cp1 != *cp2)
break;
cp1++; cp2++;
}
#if INCLUDE_FLASH
if ((cp2 != tbuf) || (!TFS_FILEEXISTS(lasttfp))) {
int first, last;
if (addrtosector(cp1,&first,0,0) == -1)
return(TFSERR_FLASHFAILURE);
if (addrtosector((uchar *)tdp->end,&last,0,0) == -1)
return(TFSERR_FLASHFAILURE);
printf("Erasing sectors %d-%d...\n",first,last);
while(first<last) {
if (flasherase(first++) == 0)
return(TFSERR_FLASHFAILURE);
}
}
#endif
/* Copy data placed in RAM back to flash: */
printf("Restoring flash...\n");
if (TFS_DEVTYPE_ISRAM(tdp)) {
memcpy((char *)(tdp->start),(char *)appramstart,
(tbuf-(uchar*)appramstart));
}
else {
#if INCLUDE_FLASH
int err;
err = AppFlashWrite((uchar *)(tdp->start),(uchar *)appramstart,
(tbuf-(uchar*)appramstart));
if (err < 0)
#endif
return(TFSERR_FLASHFAILURE);
}
/* All defragmentation is done, so verify sanity of files... */
chkstat = tfscheck(tdp,verbose);
return(chkstat);
}
#endif
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