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CRC check: Added CRC check in flashdisk

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- added CRC check for rtems_fdisk_recover_block_mappings function
- Computes CRC of page data and compares with page descriptor
- Marks pages as bad if CRC mismatch occurs
This commit is contained in:
Prakhar Kumar
2026-03-19 18:10:59 -05:00
committed by Joel Sherrill
parent 6e83c38851
commit b3a0dc0966
1 changed files with 27 additions and 10 deletions
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cpukit/libblock/src/flashdisk.c
+27 -10
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@@ -1868,17 +1868,34 @@ static int rtems_fdisk_recover_block_mappings( rtems_flashdisk *fd )
);
sc->pages_bad++;
} else {
/**
* @todo
* Add start up crc checks here.
*/
fd->blocks[ pd->block ].segment = sc;
fd->blocks[ pd->block ].page = page;
uint8_t buffer[fd->block_size];
uint16_t cs;
ret = rtems_fdisk_seg_read_page( fd, sc,
page + sc->pages_desc,
buffer );
/*
* The page is active.
*/
sc->pages_active++;
if( ret ) {
#if RTEMS_FDISK_TRACE
rtems_fdisk_info( fd,
"read-block:%02d-%03d-%03d: read page failed: %s (%d)",
sc->device, sc->segment, fd->blocks[pd->block].page,
strerror( ret ), ret );
#endif
return ret;
}
cs = rtems_fdisk_page_checksum( buffer, fd->block_size );
if( cs != pd->crc ) {
sc->pages_bad++;
} else {
fd->blocks[pd->block].segment = sc;
fd->blocks[pd->block].page = page;
/*
* The page is active.
*/
sc->pages_active++;
}
}
} else {
sc->pages_bad++;