static ssm_bitmap_t *
ctn_space_bmap_init(int col_size, int unit_size)
{
int nbits;
bitmap_t *bitmap;
ssm_bitmap_t *bmap;
nbits = (col_size + unit_size - 1) / unit_size;
bitmap = bmap_alloc(nbits);
if (!bitmap) {
fprintf(stderr, "Failed to allocate bitmap.\n");
return NULL;
}
bmap = (ssm_bitmap_t *)malloc(sizeof(ssm_bitmap_t));
if (!bmap) {
fprintf(stderr, "Failed to allocate bitmap structure.\n");
free(bitmap);
return NULL;
}
bmap->sb_magic = SSM_MAGIC_1_0;
bmap->sb_seqno = ssm_seqno;
bmap->sb_bitmap = bitmap;
bmap->sb_nbit = nbits;
return bmap;
}
clear_bit(buf->buf.bmap, bit);
bdirty(buf, TRUE);
}
brelse(buf);
return TRUE;
}
/* Data-block bitmap handling. */
/* Allocate a new block from DEV's bitmap. LOCALITY is where you want the
new block to be close to. Note that LOCALITY is ignored for now... */
blkno
alloc_block(struct fs_device *dev, __attribute__ ((unused)) blkno locality)
{
blkno blk = bmap_alloc(dev, dev->sup.data_bitmap, dev->sup.data_size);
return (blk == NO_FREE_BLOCK) ? 0 : dev->sup.data + blk;
}
/* Deallocate the block BLK from DEV. */
bool
free_block(struct fs_device *dev, blkno blk)
{
return bmap_free(dev, dev->sup.data_bitmap, blk - dev->sup.data);
}
/* Returns the total number of used blocks in the device DEV. This takes
into account the boot-block, inode-blocks and the bitmap-blocks. */
u_long
used_blocks(struct fs_device *dev)
/* Allocate a new block from DEV's bitmap. LOCALITY is where you want the
new block to be close to. Note that LOCALITY is ignored for now... */
blkno
alloc_block(struct fs_device *dev, blkno locality)
{
blkno blk = bmap_alloc(dev, dev->sup.data_bitmap, dev->sup.data_size);
return (blk == -1) ? 0 : dev->sup.data + blk;
}