Function blst_leaf_fill

freebsd/kern/subr_blist.c:989–1002

* BLST_LEAF_FILL() - allocate specific blocks in leaf bitmap * * This routine allocates all blocks in the specified range * regardless of any existing allocations in that range. Returns * the number of blocks allocated by the call. */

 *	the number of blocks allocated by the call.
 */
static daddr_t
blst_leaf_fill(blmeta_t *scan, daddr_t blk, int count)
{
	daddr_t nblks;
	u_daddr_t mask;

	mask = bitrange(blk & BLIST_MASK, count);

	/* Count the number of blocks that we are allocating. */
	nblks = bitcount64(scan->bm_bitmap & mask);

	scan->bm_bitmap &= ~mask;
	return (nblks);
}

/*
 * BLIST_META_FILL() -	allocate specific blocks at a meta node