/*
* returns a count of the number of free bits in a plane.
*/
int ssd_free_bits(int plane_num, int elem_num, ssd_element_metadata *metadata, ssd_t *s)
{
int i;
int freecount = 0;
int start = plane_num * s->params.blocks_per_plane;
for (i = start; i < start + (int)s->params.blocks_per_plane; i ++) {
if (!ssd_bit_on(metadata->free_blocks, i)) {
freecount ++;
}
}
return freecount;
}
/*
* we clean a block only after it is fully used.
*/
int ssd_can_clean_block(ssd_t *s, ssd_element_metadata *metadata, int blk)
{
int bitpos = ssd_block_to_bitpos(s, blk);
return ((ssd_bit_on(metadata->free_blocks, bitpos)) && (metadata->block_usage[blk].state == SSD_BLOCK_SEALED));
}